Commit | Line | Data |
---|---|---|
8318d78a JB |
1 | /* |
2 | * Copyright 2002-2005, Instant802 Networks, Inc. | |
3 | * Copyright 2005-2006, Devicescape Software, Inc. | |
4 | * Copyright 2007 Johannes Berg <johannes@sipsolutions.net> | |
3b77d5ec | 5 | * Copyright 2008-2011 Luis R. Rodriguez <mcgrof@qca.qualcomm.com> |
8318d78a | 6 | * |
3b77d5ec LR |
7 | * Permission to use, copy, modify, and/or distribute this software for any |
8 | * purpose with or without fee is hereby granted, provided that the above | |
9 | * copyright notice and this permission notice appear in all copies. | |
10 | * | |
11 | * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES | |
12 | * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF | |
13 | * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR | |
14 | * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES | |
15 | * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN | |
16 | * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF | |
17 | * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. | |
8318d78a JB |
18 | */ |
19 | ||
3b77d5ec | 20 | |
b2e1b302 LR |
21 | /** |
22 | * DOC: Wireless regulatory infrastructure | |
8318d78a JB |
23 | * |
24 | * The usual implementation is for a driver to read a device EEPROM to | |
25 | * determine which regulatory domain it should be operating under, then | |
26 | * looking up the allowable channels in a driver-local table and finally | |
27 | * registering those channels in the wiphy structure. | |
28 | * | |
b2e1b302 LR |
29 | * Another set of compliance enforcement is for drivers to use their |
30 | * own compliance limits which can be stored on the EEPROM. The host | |
31 | * driver or firmware may ensure these are used. | |
32 | * | |
33 | * In addition to all this we provide an extra layer of regulatory | |
34 | * conformance. For drivers which do not have any regulatory | |
35 | * information CRDA provides the complete regulatory solution. | |
36 | * For others it provides a community effort on further restrictions | |
37 | * to enhance compliance. | |
38 | * | |
39 | * Note: When number of rules --> infinity we will not be able to | |
40 | * index on alpha2 any more, instead we'll probably have to | |
41 | * rely on some SHA1 checksum of the regdomain for example. | |
42 | * | |
8318d78a | 43 | */ |
e9c0268f JP |
44 | |
45 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt | |
46 | ||
8318d78a | 47 | #include <linux/kernel.h> |
bc3b2d7f | 48 | #include <linux/export.h> |
5a0e3ad6 | 49 | #include <linux/slab.h> |
b2e1b302 | 50 | #include <linux/list.h> |
c61029c7 | 51 | #include <linux/ctype.h> |
b2e1b302 LR |
52 | #include <linux/nl80211.h> |
53 | #include <linux/platform_device.h> | |
d9b93842 | 54 | #include <linux/moduleparam.h> |
b2e1b302 | 55 | #include <net/cfg80211.h> |
8318d78a | 56 | #include "core.h" |
b2e1b302 | 57 | #include "reg.h" |
3b377ea9 | 58 | #include "regdb.h" |
73d54c9e | 59 | #include "nl80211.h" |
8318d78a | 60 | |
4113f751 | 61 | #ifdef CONFIG_CFG80211_REG_DEBUG |
12c5ffb5 JP |
62 | #define REG_DBG_PRINT(format, args...) \ |
63 | printk(KERN_DEBUG pr_fmt(format), ##args) | |
4113f751 | 64 | #else |
8271195e | 65 | #define REG_DBG_PRINT(args...) |
4113f751 LR |
66 | #endif |
67 | ||
2f92212b JB |
68 | enum reg_request_treatment { |
69 | REG_REQ_OK, | |
70 | REG_REQ_IGNORE, | |
71 | REG_REQ_INTERSECT, | |
72 | REG_REQ_ALREADY_SET, | |
73 | }; | |
74 | ||
a042994d LR |
75 | static struct regulatory_request core_request_world = { |
76 | .initiator = NL80211_REGDOM_SET_BY_CORE, | |
77 | .alpha2[0] = '0', | |
78 | .alpha2[1] = '0', | |
79 | .intersect = false, | |
80 | .processed = true, | |
81 | .country_ie_env = ENVIRON_ANY, | |
82 | }; | |
83 | ||
38fd2143 JB |
84 | /* |
85 | * Receipt of information from last regulatory request, | |
86 | * protected by RTNL (and can be accessed with RCU protection) | |
87 | */ | |
c492db37 JB |
88 | static struct regulatory_request __rcu *last_request = |
89 | (void __rcu *)&core_request_world; | |
734366de | 90 | |
b2e1b302 LR |
91 | /* To trigger userspace events */ |
92 | static struct platform_device *reg_pdev; | |
8318d78a | 93 | |
fb1fc7ad LR |
94 | /* |
95 | * Central wireless core regulatory domains, we only need two, | |
734366de | 96 | * the current one and a world regulatory domain in case we have no |
e8da2bb4 | 97 | * information to give us an alpha2. |
38fd2143 | 98 | * (protected by RTNL, can be read under RCU) |
fb1fc7ad | 99 | */ |
458f4f9e | 100 | const struct ieee80211_regdomain __rcu *cfg80211_regdomain; |
734366de | 101 | |
57b5ce07 LR |
102 | /* |
103 | * Number of devices that registered to the core | |
104 | * that support cellular base station regulatory hints | |
38fd2143 | 105 | * (protected by RTNL) |
57b5ce07 LR |
106 | */ |
107 | static int reg_num_devs_support_basehint; | |
108 | ||
458f4f9e JB |
109 | static const struct ieee80211_regdomain *get_cfg80211_regdom(void) |
110 | { | |
38fd2143 | 111 | return rtnl_dereference(cfg80211_regdomain); |
458f4f9e JB |
112 | } |
113 | ||
114 | static const struct ieee80211_regdomain *get_wiphy_regdom(struct wiphy *wiphy) | |
115 | { | |
38fd2143 | 116 | return rtnl_dereference(wiphy->regd); |
458f4f9e JB |
117 | } |
118 | ||
3ef121b5 LR |
119 | static const char *reg_dfs_region_str(enum nl80211_dfs_regions dfs_region) |
120 | { | |
121 | switch (dfs_region) { | |
122 | case NL80211_DFS_UNSET: | |
123 | return "unset"; | |
124 | case NL80211_DFS_FCC: | |
125 | return "FCC"; | |
126 | case NL80211_DFS_ETSI: | |
127 | return "ETSI"; | |
128 | case NL80211_DFS_JP: | |
129 | return "JP"; | |
130 | } | |
131 | return "Unknown"; | |
132 | } | |
133 | ||
6c474799 LR |
134 | enum nl80211_dfs_regions reg_get_dfs_region(struct wiphy *wiphy) |
135 | { | |
136 | const struct ieee80211_regdomain *regd = NULL; | |
137 | const struct ieee80211_regdomain *wiphy_regd = NULL; | |
138 | ||
139 | regd = get_cfg80211_regdom(); | |
140 | if (!wiphy) | |
141 | goto out; | |
142 | ||
143 | wiphy_regd = get_wiphy_regdom(wiphy); | |
144 | if (!wiphy_regd) | |
145 | goto out; | |
146 | ||
147 | if (wiphy_regd->dfs_region == regd->dfs_region) | |
148 | goto out; | |
149 | ||
150 | REG_DBG_PRINT("%s: device specific dfs_region " | |
151 | "(%s) disagrees with cfg80211's " | |
152 | "central dfs_region (%s)\n", | |
153 | dev_name(&wiphy->dev), | |
154 | reg_dfs_region_str(wiphy_regd->dfs_region), | |
155 | reg_dfs_region_str(regd->dfs_region)); | |
156 | ||
157 | out: | |
158 | return regd->dfs_region; | |
159 | } | |
160 | ||
458f4f9e JB |
161 | static void rcu_free_regdom(const struct ieee80211_regdomain *r) |
162 | { | |
163 | if (!r) | |
164 | return; | |
165 | kfree_rcu((struct ieee80211_regdomain *)r, rcu_head); | |
166 | } | |
167 | ||
c492db37 JB |
168 | static struct regulatory_request *get_last_request(void) |
169 | { | |
38fd2143 | 170 | return rcu_dereference_rtnl(last_request); |
c492db37 JB |
171 | } |
172 | ||
e38f8a7a | 173 | /* Used to queue up regulatory hints */ |
fe33eb39 LR |
174 | static LIST_HEAD(reg_requests_list); |
175 | static spinlock_t reg_requests_lock; | |
176 | ||
e38f8a7a LR |
177 | /* Used to queue up beacon hints for review */ |
178 | static LIST_HEAD(reg_pending_beacons); | |
179 | static spinlock_t reg_pending_beacons_lock; | |
180 | ||
181 | /* Used to keep track of processed beacon hints */ | |
182 | static LIST_HEAD(reg_beacon_list); | |
183 | ||
184 | struct reg_beacon { | |
185 | struct list_head list; | |
186 | struct ieee80211_channel chan; | |
187 | }; | |
188 | ||
f333a7a2 LR |
189 | static void reg_todo(struct work_struct *work); |
190 | static DECLARE_WORK(reg_work, reg_todo); | |
191 | ||
a90c7a31 LR |
192 | static void reg_timeout_work(struct work_struct *work); |
193 | static DECLARE_DELAYED_WORK(reg_timeout, reg_timeout_work); | |
194 | ||
734366de JB |
195 | /* We keep a static world regulatory domain in case of the absence of CRDA */ |
196 | static const struct ieee80211_regdomain world_regdom = { | |
90cdc6df | 197 | .n_reg_rules = 6, |
734366de JB |
198 | .alpha2 = "00", |
199 | .reg_rules = { | |
68798a62 LR |
200 | /* IEEE 802.11b/g, channels 1..11 */ |
201 | REG_RULE(2412-10, 2462+10, 40, 6, 20, 0), | |
43c771a1 JB |
202 | /* IEEE 802.11b/g, channels 12..13. */ |
203 | REG_RULE(2467-10, 2472+10, 40, 6, 20, | |
8fe02e16 | 204 | NL80211_RRF_NO_IR), |
611b6a82 LR |
205 | /* IEEE 802.11 channel 14 - Only JP enables |
206 | * this and for 802.11b only */ | |
207 | REG_RULE(2484-10, 2484+10, 20, 6, 20, | |
8fe02e16 | 208 | NL80211_RRF_NO_IR | |
611b6a82 LR |
209 | NL80211_RRF_NO_OFDM), |
210 | /* IEEE 802.11a, channel 36..48 */ | |
131a19bc | 211 | REG_RULE(5180-10, 5240+10, 160, 6, 20, |
8fe02e16 | 212 | NL80211_RRF_NO_IR), |
3fc71f77 | 213 | |
131a19bc JB |
214 | /* IEEE 802.11a, channel 52..64 - DFS required */ |
215 | REG_RULE(5260-10, 5320+10, 160, 6, 20, | |
8fe02e16 | 216 | NL80211_RRF_NO_IR | |
131a19bc JB |
217 | NL80211_RRF_DFS), |
218 | ||
219 | /* IEEE 802.11a, channel 100..144 - DFS required */ | |
220 | REG_RULE(5500-10, 5720+10, 160, 6, 20, | |
8fe02e16 | 221 | NL80211_RRF_NO_IR | |
131a19bc | 222 | NL80211_RRF_DFS), |
3fc71f77 LR |
223 | |
224 | /* IEEE 802.11a, channel 149..165 */ | |
8ab9d85c | 225 | REG_RULE(5745-10, 5825+10, 80, 6, 20, |
8fe02e16 | 226 | NL80211_RRF_NO_IR), |
90cdc6df VK |
227 | |
228 | /* IEEE 802.11ad (60gHz), channels 1..3 */ | |
229 | REG_RULE(56160+2160*1-1080, 56160+2160*3+1080, 2160, 0, 0, 0), | |
734366de JB |
230 | } |
231 | }; | |
232 | ||
38fd2143 | 233 | /* protected by RTNL */ |
a3d2eaf0 JB |
234 | static const struct ieee80211_regdomain *cfg80211_world_regdom = |
235 | &world_regdom; | |
734366de | 236 | |
6ee7d330 | 237 | static char *ieee80211_regdom = "00"; |
09d989d1 | 238 | static char user_alpha2[2]; |
6ee7d330 | 239 | |
734366de JB |
240 | module_param(ieee80211_regdom, charp, 0444); |
241 | MODULE_PARM_DESC(ieee80211_regdom, "IEEE 802.11 regulatory domain code"); | |
242 | ||
5ad6ef5e LR |
243 | static void reg_kfree_last_request(void) |
244 | { | |
245 | struct regulatory_request *lr; | |
246 | ||
247 | lr = get_last_request(); | |
248 | ||
249 | if (lr != &core_request_world && lr) | |
250 | kfree_rcu(lr, rcu_head); | |
251 | } | |
252 | ||
05f1a3ea LR |
253 | static void reg_update_last_request(struct regulatory_request *request) |
254 | { | |
255 | reg_kfree_last_request(); | |
256 | rcu_assign_pointer(last_request, request); | |
257 | } | |
258 | ||
379b82f4 JB |
259 | static void reset_regdomains(bool full_reset, |
260 | const struct ieee80211_regdomain *new_regdom) | |
734366de | 261 | { |
458f4f9e JB |
262 | const struct ieee80211_regdomain *r; |
263 | ||
38fd2143 | 264 | ASSERT_RTNL(); |
e8da2bb4 | 265 | |
458f4f9e JB |
266 | r = get_cfg80211_regdom(); |
267 | ||
942b25cf | 268 | /* avoid freeing static information or freeing something twice */ |
458f4f9e JB |
269 | if (r == cfg80211_world_regdom) |
270 | r = NULL; | |
942b25cf JB |
271 | if (cfg80211_world_regdom == &world_regdom) |
272 | cfg80211_world_regdom = NULL; | |
458f4f9e JB |
273 | if (r == &world_regdom) |
274 | r = NULL; | |
942b25cf | 275 | |
458f4f9e JB |
276 | rcu_free_regdom(r); |
277 | rcu_free_regdom(cfg80211_world_regdom); | |
734366de | 278 | |
a3d2eaf0 | 279 | cfg80211_world_regdom = &world_regdom; |
458f4f9e | 280 | rcu_assign_pointer(cfg80211_regdomain, new_regdom); |
a042994d LR |
281 | |
282 | if (!full_reset) | |
283 | return; | |
284 | ||
05f1a3ea | 285 | reg_update_last_request(&core_request_world); |
734366de JB |
286 | } |
287 | ||
fb1fc7ad LR |
288 | /* |
289 | * Dynamic world regulatory domain requested by the wireless | |
290 | * core upon initialization | |
291 | */ | |
a3d2eaf0 | 292 | static void update_world_regdomain(const struct ieee80211_regdomain *rd) |
734366de | 293 | { |
c492db37 | 294 | struct regulatory_request *lr; |
734366de | 295 | |
c492db37 JB |
296 | lr = get_last_request(); |
297 | ||
298 | WARN_ON(!lr); | |
734366de | 299 | |
379b82f4 | 300 | reset_regdomains(false, rd); |
734366de JB |
301 | |
302 | cfg80211_world_regdom = rd; | |
734366de | 303 | } |
734366de | 304 | |
a3d2eaf0 | 305 | bool is_world_regdom(const char *alpha2) |
b2e1b302 LR |
306 | { |
307 | if (!alpha2) | |
308 | return false; | |
1a919318 | 309 | return alpha2[0] == '0' && alpha2[1] == '0'; |
b2e1b302 | 310 | } |
8318d78a | 311 | |
a3d2eaf0 | 312 | static bool is_alpha2_set(const char *alpha2) |
b2e1b302 LR |
313 | { |
314 | if (!alpha2) | |
315 | return false; | |
1a919318 | 316 | return alpha2[0] && alpha2[1]; |
b2e1b302 | 317 | } |
8318d78a | 318 | |
a3d2eaf0 | 319 | static bool is_unknown_alpha2(const char *alpha2) |
b2e1b302 LR |
320 | { |
321 | if (!alpha2) | |
322 | return false; | |
fb1fc7ad LR |
323 | /* |
324 | * Special case where regulatory domain was built by driver | |
325 | * but a specific alpha2 cannot be determined | |
326 | */ | |
1a919318 | 327 | return alpha2[0] == '9' && alpha2[1] == '9'; |
b2e1b302 | 328 | } |
8318d78a | 329 | |
3f2355cb LR |
330 | static bool is_intersected_alpha2(const char *alpha2) |
331 | { | |
332 | if (!alpha2) | |
333 | return false; | |
fb1fc7ad LR |
334 | /* |
335 | * Special case where regulatory domain is the | |
3f2355cb | 336 | * result of an intersection between two regulatory domain |
fb1fc7ad LR |
337 | * structures |
338 | */ | |
1a919318 | 339 | return alpha2[0] == '9' && alpha2[1] == '8'; |
3f2355cb LR |
340 | } |
341 | ||
a3d2eaf0 | 342 | static bool is_an_alpha2(const char *alpha2) |
b2e1b302 LR |
343 | { |
344 | if (!alpha2) | |
345 | return false; | |
1a919318 | 346 | return isalpha(alpha2[0]) && isalpha(alpha2[1]); |
b2e1b302 | 347 | } |
8318d78a | 348 | |
a3d2eaf0 | 349 | static bool alpha2_equal(const char *alpha2_x, const char *alpha2_y) |
b2e1b302 LR |
350 | { |
351 | if (!alpha2_x || !alpha2_y) | |
352 | return false; | |
1a919318 | 353 | return alpha2_x[0] == alpha2_y[0] && alpha2_x[1] == alpha2_y[1]; |
b2e1b302 LR |
354 | } |
355 | ||
69b1572b | 356 | static bool regdom_changes(const char *alpha2) |
b2e1b302 | 357 | { |
458f4f9e | 358 | const struct ieee80211_regdomain *r = get_cfg80211_regdom(); |
761cf7ec | 359 | |
458f4f9e | 360 | if (!r) |
b2e1b302 | 361 | return true; |
458f4f9e | 362 | return !alpha2_equal(r->alpha2, alpha2); |
b2e1b302 LR |
363 | } |
364 | ||
09d989d1 LR |
365 | /* |
366 | * The NL80211_REGDOM_SET_BY_USER regdom alpha2 is cached, this lets | |
367 | * you know if a valid regulatory hint with NL80211_REGDOM_SET_BY_USER | |
368 | * has ever been issued. | |
369 | */ | |
370 | static bool is_user_regdom_saved(void) | |
371 | { | |
372 | if (user_alpha2[0] == '9' && user_alpha2[1] == '7') | |
373 | return false; | |
374 | ||
375 | /* This would indicate a mistake on the design */ | |
1a919318 | 376 | if (WARN(!is_world_regdom(user_alpha2) && !is_an_alpha2(user_alpha2), |
09d989d1 | 377 | "Unexpected user alpha2: %c%c\n", |
1a919318 | 378 | user_alpha2[0], user_alpha2[1])) |
09d989d1 LR |
379 | return false; |
380 | ||
381 | return true; | |
382 | } | |
383 | ||
e9763c3c JB |
384 | static const struct ieee80211_regdomain * |
385 | reg_copy_regd(const struct ieee80211_regdomain *src_regd) | |
3b377ea9 JL |
386 | { |
387 | struct ieee80211_regdomain *regd; | |
e9763c3c | 388 | int size_of_regd; |
3b377ea9 JL |
389 | unsigned int i; |
390 | ||
82f20856 JB |
391 | size_of_regd = |
392 | sizeof(struct ieee80211_regdomain) + | |
393 | src_regd->n_reg_rules * sizeof(struct ieee80211_reg_rule); | |
3b377ea9 JL |
394 | |
395 | regd = kzalloc(size_of_regd, GFP_KERNEL); | |
396 | if (!regd) | |
e9763c3c | 397 | return ERR_PTR(-ENOMEM); |
3b377ea9 JL |
398 | |
399 | memcpy(regd, src_regd, sizeof(struct ieee80211_regdomain)); | |
400 | ||
401 | for (i = 0; i < src_regd->n_reg_rules; i++) | |
402 | memcpy(®d->reg_rules[i], &src_regd->reg_rules[i], | |
e9763c3c | 403 | sizeof(struct ieee80211_reg_rule)); |
3b377ea9 | 404 | |
e9763c3c | 405 | return regd; |
3b377ea9 JL |
406 | } |
407 | ||
408 | #ifdef CONFIG_CFG80211_INTERNAL_REGDB | |
409 | struct reg_regdb_search_request { | |
410 | char alpha2[2]; | |
411 | struct list_head list; | |
412 | }; | |
413 | ||
414 | static LIST_HEAD(reg_regdb_search_list); | |
368d06f5 | 415 | static DEFINE_MUTEX(reg_regdb_search_mutex); |
3b377ea9 JL |
416 | |
417 | static void reg_regdb_search(struct work_struct *work) | |
418 | { | |
419 | struct reg_regdb_search_request *request; | |
e9763c3c JB |
420 | const struct ieee80211_regdomain *curdom, *regdom = NULL; |
421 | int i; | |
a85d0d7f | 422 | |
5fe231e8 | 423 | rtnl_lock(); |
3b377ea9 | 424 | |
368d06f5 | 425 | mutex_lock(®_regdb_search_mutex); |
3b377ea9 JL |
426 | while (!list_empty(®_regdb_search_list)) { |
427 | request = list_first_entry(®_regdb_search_list, | |
428 | struct reg_regdb_search_request, | |
429 | list); | |
430 | list_del(&request->list); | |
431 | ||
1a919318 | 432 | for (i = 0; i < reg_regdb_size; i++) { |
3b377ea9 JL |
433 | curdom = reg_regdb[i]; |
434 | ||
1a919318 | 435 | if (alpha2_equal(request->alpha2, curdom->alpha2)) { |
e9763c3c | 436 | regdom = reg_copy_regd(curdom); |
3b377ea9 JL |
437 | break; |
438 | } | |
439 | } | |
440 | ||
441 | kfree(request); | |
442 | } | |
368d06f5 | 443 | mutex_unlock(®_regdb_search_mutex); |
a85d0d7f | 444 | |
e9763c3c | 445 | if (!IS_ERR_OR_NULL(regdom)) |
a85d0d7f LR |
446 | set_regdom(regdom); |
447 | ||
5fe231e8 | 448 | rtnl_unlock(); |
3b377ea9 JL |
449 | } |
450 | ||
451 | static DECLARE_WORK(reg_regdb_work, reg_regdb_search); | |
452 | ||
453 | static void reg_regdb_query(const char *alpha2) | |
454 | { | |
455 | struct reg_regdb_search_request *request; | |
456 | ||
457 | if (!alpha2) | |
458 | return; | |
459 | ||
460 | request = kzalloc(sizeof(struct reg_regdb_search_request), GFP_KERNEL); | |
461 | if (!request) | |
462 | return; | |
463 | ||
464 | memcpy(request->alpha2, alpha2, 2); | |
465 | ||
368d06f5 | 466 | mutex_lock(®_regdb_search_mutex); |
3b377ea9 | 467 | list_add_tail(&request->list, ®_regdb_search_list); |
368d06f5 | 468 | mutex_unlock(®_regdb_search_mutex); |
3b377ea9 JL |
469 | |
470 | schedule_work(®_regdb_work); | |
471 | } | |
80007efe LR |
472 | |
473 | /* Feel free to add any other sanity checks here */ | |
474 | static void reg_regdb_size_check(void) | |
475 | { | |
476 | /* We should ideally BUILD_BUG_ON() but then random builds would fail */ | |
477 | WARN_ONCE(!reg_regdb_size, "db.txt is empty, you should update it..."); | |
478 | } | |
3b377ea9 | 479 | #else |
80007efe | 480 | static inline void reg_regdb_size_check(void) {} |
3b377ea9 JL |
481 | static inline void reg_regdb_query(const char *alpha2) {} |
482 | #endif /* CONFIG_CFG80211_INTERNAL_REGDB */ | |
483 | ||
fb1fc7ad LR |
484 | /* |
485 | * This lets us keep regulatory code which is updated on a regulatory | |
1226d258 | 486 | * basis in userspace. |
fb1fc7ad | 487 | */ |
b2e1b302 LR |
488 | static int call_crda(const char *alpha2) |
489 | { | |
1226d258 JB |
490 | char country[12]; |
491 | char *env[] = { country, NULL }; | |
492 | ||
493 | snprintf(country, sizeof(country), "COUNTRY=%c%c", | |
494 | alpha2[0], alpha2[1]); | |
495 | ||
b2e1b302 | 496 | if (!is_world_regdom((char *) alpha2)) |
e9c0268f | 497 | pr_info("Calling CRDA for country: %c%c\n", |
b2e1b302 LR |
498 | alpha2[0], alpha2[1]); |
499 | else | |
e9c0268f | 500 | pr_info("Calling CRDA to update world regulatory domain\n"); |
b2e1b302 | 501 | |
3b377ea9 JL |
502 | /* query internal regulatory database (if it exists) */ |
503 | reg_regdb_query(alpha2); | |
504 | ||
1226d258 | 505 | return kobject_uevent_env(®_pdev->dev.kobj, KOBJ_CHANGE, env); |
b2e1b302 LR |
506 | } |
507 | ||
fe6631ff LR |
508 | static enum reg_request_treatment |
509 | reg_call_crda(struct regulatory_request *request) | |
510 | { | |
511 | if (call_crda(request->alpha2)) | |
512 | return REG_REQ_IGNORE; | |
513 | return REG_REQ_OK; | |
514 | } | |
515 | ||
e438768f | 516 | bool reg_is_valid_request(const char *alpha2) |
b2e1b302 | 517 | { |
c492db37 | 518 | struct regulatory_request *lr = get_last_request(); |
61405e97 | 519 | |
c492db37 | 520 | if (!lr || lr->processed) |
f6037d09 JB |
521 | return false; |
522 | ||
c492db37 | 523 | return alpha2_equal(lr->alpha2, alpha2); |
b2e1b302 | 524 | } |
8318d78a | 525 | |
e3961af1 JD |
526 | static const struct ieee80211_regdomain *reg_get_regdomain(struct wiphy *wiphy) |
527 | { | |
528 | struct regulatory_request *lr = get_last_request(); | |
529 | ||
530 | /* | |
531 | * Follow the driver's regulatory domain, if present, unless a country | |
532 | * IE has been processed or a user wants to help complaince further | |
533 | */ | |
534 | if (lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && | |
535 | lr->initiator != NL80211_REGDOM_SET_BY_USER && | |
536 | wiphy->regd) | |
537 | return get_wiphy_regdom(wiphy); | |
538 | ||
539 | return get_cfg80211_regdom(); | |
540 | } | |
541 | ||
97524820 JD |
542 | unsigned int reg_get_max_bandwidth(const struct ieee80211_regdomain *rd, |
543 | const struct ieee80211_reg_rule *rule) | |
544 | { | |
545 | const struct ieee80211_freq_range *freq_range = &rule->freq_range; | |
546 | const struct ieee80211_freq_range *freq_range_tmp; | |
547 | const struct ieee80211_reg_rule *tmp; | |
548 | u32 start_freq, end_freq, idx, no; | |
549 | ||
550 | for (idx = 0; idx < rd->n_reg_rules; idx++) | |
551 | if (rule == &rd->reg_rules[idx]) | |
552 | break; | |
553 | ||
554 | if (idx == rd->n_reg_rules) | |
555 | return 0; | |
556 | ||
557 | /* get start_freq */ | |
558 | no = idx; | |
559 | ||
560 | while (no) { | |
561 | tmp = &rd->reg_rules[--no]; | |
562 | freq_range_tmp = &tmp->freq_range; | |
563 | ||
564 | if (freq_range_tmp->end_freq_khz < freq_range->start_freq_khz) | |
565 | break; | |
566 | ||
97524820 JD |
567 | freq_range = freq_range_tmp; |
568 | } | |
569 | ||
570 | start_freq = freq_range->start_freq_khz; | |
571 | ||
572 | /* get end_freq */ | |
573 | freq_range = &rule->freq_range; | |
574 | no = idx; | |
575 | ||
576 | while (no < rd->n_reg_rules - 1) { | |
577 | tmp = &rd->reg_rules[++no]; | |
578 | freq_range_tmp = &tmp->freq_range; | |
579 | ||
580 | if (freq_range_tmp->start_freq_khz > freq_range->end_freq_khz) | |
581 | break; | |
582 | ||
97524820 JD |
583 | freq_range = freq_range_tmp; |
584 | } | |
585 | ||
586 | end_freq = freq_range->end_freq_khz; | |
587 | ||
588 | return end_freq - start_freq; | |
589 | } | |
590 | ||
b2e1b302 | 591 | /* Sanity check on a regulatory rule */ |
a3d2eaf0 | 592 | static bool is_valid_reg_rule(const struct ieee80211_reg_rule *rule) |
8318d78a | 593 | { |
a3d2eaf0 | 594 | const struct ieee80211_freq_range *freq_range = &rule->freq_range; |
b2e1b302 LR |
595 | u32 freq_diff; |
596 | ||
91e99004 | 597 | if (freq_range->start_freq_khz <= 0 || freq_range->end_freq_khz <= 0) |
b2e1b302 LR |
598 | return false; |
599 | ||
600 | if (freq_range->start_freq_khz > freq_range->end_freq_khz) | |
601 | return false; | |
602 | ||
603 | freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz; | |
604 | ||
bd05f28e | 605 | if (freq_range->end_freq_khz <= freq_range->start_freq_khz || |
1a919318 | 606 | freq_range->max_bandwidth_khz > freq_diff) |
b2e1b302 LR |
607 | return false; |
608 | ||
609 | return true; | |
610 | } | |
611 | ||
a3d2eaf0 | 612 | static bool is_valid_rd(const struct ieee80211_regdomain *rd) |
b2e1b302 | 613 | { |
a3d2eaf0 | 614 | const struct ieee80211_reg_rule *reg_rule = NULL; |
b2e1b302 | 615 | unsigned int i; |
8318d78a | 616 | |
b2e1b302 LR |
617 | if (!rd->n_reg_rules) |
618 | return false; | |
8318d78a | 619 | |
88dc1c3f LR |
620 | if (WARN_ON(rd->n_reg_rules > NL80211_MAX_SUPP_REG_RULES)) |
621 | return false; | |
622 | ||
b2e1b302 LR |
623 | for (i = 0; i < rd->n_reg_rules; i++) { |
624 | reg_rule = &rd->reg_rules[i]; | |
625 | if (!is_valid_reg_rule(reg_rule)) | |
626 | return false; | |
627 | } | |
628 | ||
629 | return true; | |
8318d78a JB |
630 | } |
631 | ||
038659e7 | 632 | static bool reg_does_bw_fit(const struct ieee80211_freq_range *freq_range, |
fe7ef5e9 | 633 | u32 center_freq_khz, u32 bw_khz) |
b2e1b302 | 634 | { |
038659e7 LR |
635 | u32 start_freq_khz, end_freq_khz; |
636 | ||
637 | start_freq_khz = center_freq_khz - (bw_khz/2); | |
638 | end_freq_khz = center_freq_khz + (bw_khz/2); | |
639 | ||
640 | if (start_freq_khz >= freq_range->start_freq_khz && | |
641 | end_freq_khz <= freq_range->end_freq_khz) | |
642 | return true; | |
643 | ||
644 | return false; | |
b2e1b302 | 645 | } |
8318d78a | 646 | |
0c7dc45d LR |
647 | /** |
648 | * freq_in_rule_band - tells us if a frequency is in a frequency band | |
649 | * @freq_range: frequency rule we want to query | |
650 | * @freq_khz: frequency we are inquiring about | |
651 | * | |
652 | * This lets us know if a specific frequency rule is or is not relevant to | |
653 | * a specific frequency's band. Bands are device specific and artificial | |
64629b9d VK |
654 | * definitions (the "2.4 GHz band", the "5 GHz band" and the "60GHz band"), |
655 | * however it is safe for now to assume that a frequency rule should not be | |
656 | * part of a frequency's band if the start freq or end freq are off by more | |
657 | * than 2 GHz for the 2.4 and 5 GHz bands, and by more than 10 GHz for the | |
658 | * 60 GHz band. | |
0c7dc45d LR |
659 | * This resolution can be lowered and should be considered as we add |
660 | * regulatory rule support for other "bands". | |
661 | **/ | |
662 | static bool freq_in_rule_band(const struct ieee80211_freq_range *freq_range, | |
1a919318 | 663 | u32 freq_khz) |
0c7dc45d LR |
664 | { |
665 | #define ONE_GHZ_IN_KHZ 1000000 | |
64629b9d VK |
666 | /* |
667 | * From 802.11ad: directional multi-gigabit (DMG): | |
668 | * Pertaining to operation in a frequency band containing a channel | |
669 | * with the Channel starting frequency above 45 GHz. | |
670 | */ | |
671 | u32 limit = freq_khz > 45 * ONE_GHZ_IN_KHZ ? | |
672 | 10 * ONE_GHZ_IN_KHZ : 2 * ONE_GHZ_IN_KHZ; | |
673 | if (abs(freq_khz - freq_range->start_freq_khz) <= limit) | |
0c7dc45d | 674 | return true; |
64629b9d | 675 | if (abs(freq_khz - freq_range->end_freq_khz) <= limit) |
0c7dc45d LR |
676 | return true; |
677 | return false; | |
678 | #undef ONE_GHZ_IN_KHZ | |
679 | } | |
680 | ||
adbfb058 LR |
681 | /* |
682 | * Later on we can perhaps use the more restrictive DFS | |
683 | * region but we don't have information for that yet so | |
684 | * for now simply disallow conflicts. | |
685 | */ | |
686 | static enum nl80211_dfs_regions | |
687 | reg_intersect_dfs_region(const enum nl80211_dfs_regions dfs_region1, | |
688 | const enum nl80211_dfs_regions dfs_region2) | |
689 | { | |
690 | if (dfs_region1 != dfs_region2) | |
691 | return NL80211_DFS_UNSET; | |
692 | return dfs_region1; | |
693 | } | |
694 | ||
fb1fc7ad LR |
695 | /* |
696 | * Helper for regdom_intersect(), this does the real | |
697 | * mathematical intersection fun | |
698 | */ | |
97524820 JD |
699 | static int reg_rules_intersect(const struct ieee80211_regdomain *rd1, |
700 | const struct ieee80211_regdomain *rd2, | |
701 | const struct ieee80211_reg_rule *rule1, | |
1a919318 JB |
702 | const struct ieee80211_reg_rule *rule2, |
703 | struct ieee80211_reg_rule *intersected_rule) | |
9c96477d LR |
704 | { |
705 | const struct ieee80211_freq_range *freq_range1, *freq_range2; | |
706 | struct ieee80211_freq_range *freq_range; | |
707 | const struct ieee80211_power_rule *power_rule1, *power_rule2; | |
708 | struct ieee80211_power_rule *power_rule; | |
97524820 | 709 | u32 freq_diff, max_bandwidth1, max_bandwidth2; |
9c96477d LR |
710 | |
711 | freq_range1 = &rule1->freq_range; | |
712 | freq_range2 = &rule2->freq_range; | |
713 | freq_range = &intersected_rule->freq_range; | |
714 | ||
715 | power_rule1 = &rule1->power_rule; | |
716 | power_rule2 = &rule2->power_rule; | |
717 | power_rule = &intersected_rule->power_rule; | |
718 | ||
719 | freq_range->start_freq_khz = max(freq_range1->start_freq_khz, | |
1a919318 | 720 | freq_range2->start_freq_khz); |
9c96477d | 721 | freq_range->end_freq_khz = min(freq_range1->end_freq_khz, |
1a919318 | 722 | freq_range2->end_freq_khz); |
97524820 JD |
723 | |
724 | max_bandwidth1 = freq_range1->max_bandwidth_khz; | |
725 | max_bandwidth2 = freq_range2->max_bandwidth_khz; | |
726 | ||
b0dfd2ea JD |
727 | if (rule1->flags & NL80211_RRF_AUTO_BW) |
728 | max_bandwidth1 = reg_get_max_bandwidth(rd1, rule1); | |
729 | if (rule2->flags & NL80211_RRF_AUTO_BW) | |
730 | max_bandwidth2 = reg_get_max_bandwidth(rd2, rule2); | |
97524820 JD |
731 | |
732 | freq_range->max_bandwidth_khz = min(max_bandwidth1, max_bandwidth2); | |
9c96477d | 733 | |
b0dfd2ea JD |
734 | intersected_rule->flags = rule1->flags | rule2->flags; |
735 | ||
736 | /* | |
737 | * In case NL80211_RRF_AUTO_BW requested for both rules | |
738 | * set AUTO_BW in intersected rule also. Next we will | |
739 | * calculate BW correctly in handle_channel function. | |
740 | * In other case remove AUTO_BW flag while we calculate | |
741 | * maximum bandwidth correctly and auto calculation is | |
742 | * not required. | |
743 | */ | |
744 | if ((rule1->flags & NL80211_RRF_AUTO_BW) && | |
745 | (rule2->flags & NL80211_RRF_AUTO_BW)) | |
746 | intersected_rule->flags |= NL80211_RRF_AUTO_BW; | |
747 | else | |
748 | intersected_rule->flags &= ~NL80211_RRF_AUTO_BW; | |
749 | ||
9c96477d LR |
750 | freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz; |
751 | if (freq_range->max_bandwidth_khz > freq_diff) | |
752 | freq_range->max_bandwidth_khz = freq_diff; | |
753 | ||
754 | power_rule->max_eirp = min(power_rule1->max_eirp, | |
755 | power_rule2->max_eirp); | |
756 | power_rule->max_antenna_gain = min(power_rule1->max_antenna_gain, | |
757 | power_rule2->max_antenna_gain); | |
758 | ||
9c96477d LR |
759 | if (!is_valid_reg_rule(intersected_rule)) |
760 | return -EINVAL; | |
761 | ||
762 | return 0; | |
763 | } | |
764 | ||
765 | /** | |
766 | * regdom_intersect - do the intersection between two regulatory domains | |
767 | * @rd1: first regulatory domain | |
768 | * @rd2: second regulatory domain | |
769 | * | |
770 | * Use this function to get the intersection between two regulatory domains. | |
771 | * Once completed we will mark the alpha2 for the rd as intersected, "98", | |
772 | * as no one single alpha2 can represent this regulatory domain. | |
773 | * | |
774 | * Returns a pointer to the regulatory domain structure which will hold the | |
775 | * resulting intersection of rules between rd1 and rd2. We will | |
776 | * kzalloc() this structure for you. | |
777 | */ | |
1a919318 JB |
778 | static struct ieee80211_regdomain * |
779 | regdom_intersect(const struct ieee80211_regdomain *rd1, | |
780 | const struct ieee80211_regdomain *rd2) | |
9c96477d LR |
781 | { |
782 | int r, size_of_regd; | |
783 | unsigned int x, y; | |
784 | unsigned int num_rules = 0, rule_idx = 0; | |
785 | const struct ieee80211_reg_rule *rule1, *rule2; | |
786 | struct ieee80211_reg_rule *intersected_rule; | |
787 | struct ieee80211_regdomain *rd; | |
788 | /* This is just a dummy holder to help us count */ | |
74f53cd8 | 789 | struct ieee80211_reg_rule dummy_rule; |
9c96477d LR |
790 | |
791 | if (!rd1 || !rd2) | |
792 | return NULL; | |
793 | ||
fb1fc7ad LR |
794 | /* |
795 | * First we get a count of the rules we'll need, then we actually | |
9c96477d LR |
796 | * build them. This is to so we can malloc() and free() a |
797 | * regdomain once. The reason we use reg_rules_intersect() here | |
798 | * is it will return -EINVAL if the rule computed makes no sense. | |
fb1fc7ad LR |
799 | * All rules that do check out OK are valid. |
800 | */ | |
9c96477d LR |
801 | |
802 | for (x = 0; x < rd1->n_reg_rules; x++) { | |
803 | rule1 = &rd1->reg_rules[x]; | |
804 | for (y = 0; y < rd2->n_reg_rules; y++) { | |
805 | rule2 = &rd2->reg_rules[y]; | |
97524820 JD |
806 | if (!reg_rules_intersect(rd1, rd2, rule1, rule2, |
807 | &dummy_rule)) | |
9c96477d | 808 | num_rules++; |
9c96477d LR |
809 | } |
810 | } | |
811 | ||
812 | if (!num_rules) | |
813 | return NULL; | |
814 | ||
815 | size_of_regd = sizeof(struct ieee80211_regdomain) + | |
82f20856 | 816 | num_rules * sizeof(struct ieee80211_reg_rule); |
9c96477d LR |
817 | |
818 | rd = kzalloc(size_of_regd, GFP_KERNEL); | |
819 | if (!rd) | |
820 | return NULL; | |
821 | ||
8a57fff0 | 822 | for (x = 0; x < rd1->n_reg_rules && rule_idx < num_rules; x++) { |
9c96477d | 823 | rule1 = &rd1->reg_rules[x]; |
8a57fff0 | 824 | for (y = 0; y < rd2->n_reg_rules && rule_idx < num_rules; y++) { |
9c96477d | 825 | rule2 = &rd2->reg_rules[y]; |
fb1fc7ad LR |
826 | /* |
827 | * This time around instead of using the stack lets | |
9c96477d | 828 | * write to the target rule directly saving ourselves |
fb1fc7ad LR |
829 | * a memcpy() |
830 | */ | |
9c96477d | 831 | intersected_rule = &rd->reg_rules[rule_idx]; |
97524820 JD |
832 | r = reg_rules_intersect(rd1, rd2, rule1, rule2, |
833 | intersected_rule); | |
fb1fc7ad LR |
834 | /* |
835 | * No need to memset here the intersected rule here as | |
836 | * we're not using the stack anymore | |
837 | */ | |
9c96477d LR |
838 | if (r) |
839 | continue; | |
840 | rule_idx++; | |
841 | } | |
842 | } | |
843 | ||
844 | if (rule_idx != num_rules) { | |
845 | kfree(rd); | |
846 | return NULL; | |
847 | } | |
848 | ||
849 | rd->n_reg_rules = num_rules; | |
850 | rd->alpha2[0] = '9'; | |
851 | rd->alpha2[1] = '8'; | |
adbfb058 LR |
852 | rd->dfs_region = reg_intersect_dfs_region(rd1->dfs_region, |
853 | rd2->dfs_region); | |
9c96477d LR |
854 | |
855 | return rd; | |
856 | } | |
857 | ||
fb1fc7ad LR |
858 | /* |
859 | * XXX: add support for the rest of enum nl80211_reg_rule_flags, we may | |
860 | * want to just have the channel structure use these | |
861 | */ | |
b2e1b302 LR |
862 | static u32 map_regdom_flags(u32 rd_flags) |
863 | { | |
864 | u32 channel_flags = 0; | |
8fe02e16 LR |
865 | if (rd_flags & NL80211_RRF_NO_IR_ALL) |
866 | channel_flags |= IEEE80211_CHAN_NO_IR; | |
b2e1b302 LR |
867 | if (rd_flags & NL80211_RRF_DFS) |
868 | channel_flags |= IEEE80211_CHAN_RADAR; | |
03f6b084 SF |
869 | if (rd_flags & NL80211_RRF_NO_OFDM) |
870 | channel_flags |= IEEE80211_CHAN_NO_OFDM; | |
b2e1b302 LR |
871 | return channel_flags; |
872 | } | |
873 | ||
361c9c8b JB |
874 | static const struct ieee80211_reg_rule * |
875 | freq_reg_info_regd(struct wiphy *wiphy, u32 center_freq, | |
876 | const struct ieee80211_regdomain *regd) | |
8318d78a JB |
877 | { |
878 | int i; | |
0c7dc45d | 879 | bool band_rule_found = false; |
038659e7 LR |
880 | bool bw_fits = false; |
881 | ||
3e0c3ff3 | 882 | if (!regd) |
361c9c8b | 883 | return ERR_PTR(-EINVAL); |
b2e1b302 | 884 | |
3e0c3ff3 | 885 | for (i = 0; i < regd->n_reg_rules; i++) { |
b2e1b302 LR |
886 | const struct ieee80211_reg_rule *rr; |
887 | const struct ieee80211_freq_range *fr = NULL; | |
b2e1b302 | 888 | |
3e0c3ff3 | 889 | rr = ®d->reg_rules[i]; |
b2e1b302 | 890 | fr = &rr->freq_range; |
0c7dc45d | 891 | |
fb1fc7ad LR |
892 | /* |
893 | * We only need to know if one frequency rule was | |
0c7dc45d | 894 | * was in center_freq's band, that's enough, so lets |
fb1fc7ad LR |
895 | * not overwrite it once found |
896 | */ | |
0c7dc45d LR |
897 | if (!band_rule_found) |
898 | band_rule_found = freq_in_rule_band(fr, center_freq); | |
899 | ||
fe7ef5e9 | 900 | bw_fits = reg_does_bw_fit(fr, center_freq, MHZ_TO_KHZ(20)); |
0c7dc45d | 901 | |
361c9c8b JB |
902 | if (band_rule_found && bw_fits) |
903 | return rr; | |
8318d78a JB |
904 | } |
905 | ||
0c7dc45d | 906 | if (!band_rule_found) |
361c9c8b | 907 | return ERR_PTR(-ERANGE); |
0c7dc45d | 908 | |
361c9c8b | 909 | return ERR_PTR(-EINVAL); |
b2e1b302 LR |
910 | } |
911 | ||
361c9c8b JB |
912 | const struct ieee80211_reg_rule *freq_reg_info(struct wiphy *wiphy, |
913 | u32 center_freq) | |
1fa25e41 | 914 | { |
5d885b99 | 915 | const struct ieee80211_regdomain *regd; |
1a919318 | 916 | |
e3961af1 | 917 | regd = reg_get_regdomain(wiphy); |
5d885b99 | 918 | |
361c9c8b | 919 | return freq_reg_info_regd(wiphy, center_freq, regd); |
1fa25e41 | 920 | } |
4f366c5d | 921 | EXPORT_SYMBOL(freq_reg_info); |
b2e1b302 | 922 | |
034c6d6e | 923 | const char *reg_initiator_name(enum nl80211_reg_initiator initiator) |
926a0a09 LR |
924 | { |
925 | switch (initiator) { | |
926 | case NL80211_REGDOM_SET_BY_CORE: | |
034c6d6e | 927 | return "core"; |
926a0a09 | 928 | case NL80211_REGDOM_SET_BY_USER: |
034c6d6e | 929 | return "user"; |
926a0a09 | 930 | case NL80211_REGDOM_SET_BY_DRIVER: |
034c6d6e | 931 | return "driver"; |
926a0a09 | 932 | case NL80211_REGDOM_SET_BY_COUNTRY_IE: |
034c6d6e | 933 | return "country IE"; |
926a0a09 LR |
934 | default: |
935 | WARN_ON(1); | |
034c6d6e | 936 | return "bug"; |
926a0a09 LR |
937 | } |
938 | } | |
034c6d6e | 939 | EXPORT_SYMBOL(reg_initiator_name); |
e702d3cf | 940 | |
034c6d6e | 941 | #ifdef CONFIG_CFG80211_REG_DEBUG |
b0dfd2ea JD |
942 | static void chan_reg_rule_print_dbg(const struct ieee80211_regdomain *regd, |
943 | struct ieee80211_channel *chan, | |
e702d3cf LR |
944 | const struct ieee80211_reg_rule *reg_rule) |
945 | { | |
946 | const struct ieee80211_power_rule *power_rule; | |
947 | const struct ieee80211_freq_range *freq_range; | |
b0dfd2ea | 948 | char max_antenna_gain[32], bw[32]; |
e702d3cf LR |
949 | |
950 | power_rule = ®_rule->power_rule; | |
951 | freq_range = ®_rule->freq_range; | |
952 | ||
953 | if (!power_rule->max_antenna_gain) | |
b0dfd2ea | 954 | snprintf(max_antenna_gain, sizeof(max_antenna_gain), "N/A"); |
e702d3cf | 955 | else |
b0dfd2ea JD |
956 | snprintf(max_antenna_gain, sizeof(max_antenna_gain), "%d", |
957 | power_rule->max_antenna_gain); | |
958 | ||
959 | if (reg_rule->flags & NL80211_RRF_AUTO_BW) | |
960 | snprintf(bw, sizeof(bw), "%d KHz, %d KHz AUTO", | |
961 | freq_range->max_bandwidth_khz, | |
962 | reg_get_max_bandwidth(regd, reg_rule)); | |
963 | else | |
964 | snprintf(bw, sizeof(bw), "%d KHz", | |
965 | freq_range->max_bandwidth_khz); | |
e702d3cf | 966 | |
fe7ef5e9 JB |
967 | REG_DBG_PRINT("Updating information on frequency %d MHz with regulatory rule:\n", |
968 | chan->center_freq); | |
e702d3cf | 969 | |
b0dfd2ea | 970 | REG_DBG_PRINT("%d KHz - %d KHz @ %s), (%s mBi, %d mBm)\n", |
1a919318 | 971 | freq_range->start_freq_khz, freq_range->end_freq_khz, |
b0dfd2ea | 972 | bw, max_antenna_gain, |
e702d3cf LR |
973 | power_rule->max_eirp); |
974 | } | |
975 | #else | |
b0dfd2ea JD |
976 | static void chan_reg_rule_print_dbg(const struct ieee80211_regdomain *regd, |
977 | struct ieee80211_channel *chan, | |
e702d3cf LR |
978 | const struct ieee80211_reg_rule *reg_rule) |
979 | { | |
980 | return; | |
981 | } | |
926a0a09 LR |
982 | #endif |
983 | ||
038659e7 LR |
984 | /* |
985 | * Note that right now we assume the desired channel bandwidth | |
986 | * is always 20 MHz for each individual channel (HT40 uses 20 MHz | |
fe7ef5e9 | 987 | * per channel, the primary and the extension channel). |
038659e7 | 988 | */ |
7ca43d03 LR |
989 | static void handle_channel(struct wiphy *wiphy, |
990 | enum nl80211_reg_initiator initiator, | |
fdc9d7b2 | 991 | struct ieee80211_channel *chan) |
b2e1b302 | 992 | { |
038659e7 | 993 | u32 flags, bw_flags = 0; |
b2e1b302 LR |
994 | const struct ieee80211_reg_rule *reg_rule = NULL; |
995 | const struct ieee80211_power_rule *power_rule = NULL; | |
038659e7 | 996 | const struct ieee80211_freq_range *freq_range = NULL; |
fe33eb39 | 997 | struct wiphy *request_wiphy = NULL; |
c492db37 | 998 | struct regulatory_request *lr = get_last_request(); |
97524820 JD |
999 | const struct ieee80211_regdomain *regd; |
1000 | u32 max_bandwidth_khz; | |
a92a3ce7 | 1001 | |
c492db37 | 1002 | request_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx); |
a92a3ce7 LR |
1003 | |
1004 | flags = chan->orig_flags; | |
b2e1b302 | 1005 | |
361c9c8b JB |
1006 | reg_rule = freq_reg_info(wiphy, MHZ_TO_KHZ(chan->center_freq)); |
1007 | if (IS_ERR(reg_rule)) { | |
ca4ffe8f LR |
1008 | /* |
1009 | * We will disable all channels that do not match our | |
25985edc | 1010 | * received regulatory rule unless the hint is coming |
ca4ffe8f LR |
1011 | * from a Country IE and the Country IE had no information |
1012 | * about a band. The IEEE 802.11 spec allows for an AP | |
1013 | * to send only a subset of the regulatory rules allowed, | |
1014 | * so an AP in the US that only supports 2.4 GHz may only send | |
1015 | * a country IE with information for the 2.4 GHz band | |
1016 | * while 5 GHz is still supported. | |
1017 | */ | |
1018 | if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE && | |
361c9c8b | 1019 | PTR_ERR(reg_rule) == -ERANGE) |
ca4ffe8f LR |
1020 | return; |
1021 | ||
cc493e4f LR |
1022 | if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER && |
1023 | request_wiphy && request_wiphy == wiphy && | |
a2f73b6c | 1024 | request_wiphy->regulatory_flags & REGULATORY_STRICT_REG) { |
cc493e4f LR |
1025 | REG_DBG_PRINT("Disabling freq %d MHz for good\n", |
1026 | chan->center_freq); | |
1027 | chan->orig_flags |= IEEE80211_CHAN_DISABLED; | |
1028 | chan->flags = chan->orig_flags; | |
1029 | } else { | |
1030 | REG_DBG_PRINT("Disabling freq %d MHz\n", | |
1031 | chan->center_freq); | |
1032 | chan->flags |= IEEE80211_CHAN_DISABLED; | |
1033 | } | |
8318d78a | 1034 | return; |
ca4ffe8f | 1035 | } |
8318d78a | 1036 | |
b0dfd2ea JD |
1037 | regd = reg_get_regdomain(wiphy); |
1038 | chan_reg_rule_print_dbg(regd, chan, reg_rule); | |
e702d3cf | 1039 | |
b2e1b302 | 1040 | power_rule = ®_rule->power_rule; |
038659e7 LR |
1041 | freq_range = ®_rule->freq_range; |
1042 | ||
97524820 JD |
1043 | max_bandwidth_khz = freq_range->max_bandwidth_khz; |
1044 | /* Check if auto calculation requested */ | |
b0dfd2ea | 1045 | if (reg_rule->flags & NL80211_RRF_AUTO_BW) |
97524820 | 1046 | max_bandwidth_khz = reg_get_max_bandwidth(regd, reg_rule); |
97524820 JD |
1047 | |
1048 | if (max_bandwidth_khz < MHZ_TO_KHZ(40)) | |
038659e7 | 1049 | bw_flags = IEEE80211_CHAN_NO_HT40; |
97524820 | 1050 | if (max_bandwidth_khz < MHZ_TO_KHZ(80)) |
c7a6ee27 | 1051 | bw_flags |= IEEE80211_CHAN_NO_80MHZ; |
97524820 | 1052 | if (max_bandwidth_khz < MHZ_TO_KHZ(160)) |
c7a6ee27 | 1053 | bw_flags |= IEEE80211_CHAN_NO_160MHZ; |
b2e1b302 | 1054 | |
c492db37 | 1055 | if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER && |
806a9e39 | 1056 | request_wiphy && request_wiphy == wiphy && |
a2f73b6c | 1057 | request_wiphy->regulatory_flags & REGULATORY_STRICT_REG) { |
fb1fc7ad | 1058 | /* |
25985edc | 1059 | * This guarantees the driver's requested regulatory domain |
f976376d | 1060 | * will always be used as a base for further regulatory |
fb1fc7ad LR |
1061 | * settings |
1062 | */ | |
f976376d | 1063 | chan->flags = chan->orig_flags = |
038659e7 | 1064 | map_regdom_flags(reg_rule->flags) | bw_flags; |
f976376d LR |
1065 | chan->max_antenna_gain = chan->orig_mag = |
1066 | (int) MBI_TO_DBI(power_rule->max_antenna_gain); | |
279f0f55 | 1067 | chan->max_reg_power = chan->max_power = chan->orig_mpwr = |
f976376d LR |
1068 | (int) MBM_TO_DBM(power_rule->max_eirp); |
1069 | return; | |
1070 | } | |
1071 | ||
04f39047 SW |
1072 | chan->dfs_state = NL80211_DFS_USABLE; |
1073 | chan->dfs_state_entered = jiffies; | |
1074 | ||
aa3d7eef | 1075 | chan->beacon_found = false; |
038659e7 | 1076 | chan->flags = flags | bw_flags | map_regdom_flags(reg_rule->flags); |
1a919318 JB |
1077 | chan->max_antenna_gain = |
1078 | min_t(int, chan->orig_mag, | |
1079 | MBI_TO_DBI(power_rule->max_antenna_gain)); | |
eccc068e | 1080 | chan->max_reg_power = (int) MBM_TO_DBM(power_rule->max_eirp); |
5e31fc08 SG |
1081 | if (chan->orig_mpwr) { |
1082 | /* | |
a09a85a0 LR |
1083 | * Devices that use REGULATORY_COUNTRY_IE_FOLLOW_POWER |
1084 | * will always follow the passed country IE power settings. | |
5e31fc08 SG |
1085 | */ |
1086 | if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE && | |
a09a85a0 | 1087 | wiphy->regulatory_flags & REGULATORY_COUNTRY_IE_FOLLOW_POWER) |
5e31fc08 SG |
1088 | chan->max_power = chan->max_reg_power; |
1089 | else | |
1090 | chan->max_power = min(chan->orig_mpwr, | |
1091 | chan->max_reg_power); | |
1092 | } else | |
1093 | chan->max_power = chan->max_reg_power; | |
8318d78a JB |
1094 | } |
1095 | ||
7ca43d03 | 1096 | static void handle_band(struct wiphy *wiphy, |
fdc9d7b2 JB |
1097 | enum nl80211_reg_initiator initiator, |
1098 | struct ieee80211_supported_band *sband) | |
8318d78a | 1099 | { |
a92a3ce7 | 1100 | unsigned int i; |
a92a3ce7 | 1101 | |
fdc9d7b2 JB |
1102 | if (!sband) |
1103 | return; | |
8318d78a JB |
1104 | |
1105 | for (i = 0; i < sband->n_channels; i++) | |
fdc9d7b2 | 1106 | handle_channel(wiphy, initiator, &sband->channels[i]); |
8318d78a JB |
1107 | } |
1108 | ||
57b5ce07 LR |
1109 | static bool reg_request_cell_base(struct regulatory_request *request) |
1110 | { | |
1111 | if (request->initiator != NL80211_REGDOM_SET_BY_USER) | |
1112 | return false; | |
1a919318 | 1113 | return request->user_reg_hint_type == NL80211_USER_REG_HINT_CELL_BASE; |
57b5ce07 LR |
1114 | } |
1115 | ||
1116 | bool reg_last_request_cell_base(void) | |
1117 | { | |
38fd2143 | 1118 | return reg_request_cell_base(get_last_request()); |
57b5ce07 LR |
1119 | } |
1120 | ||
1121 | #ifdef CONFIG_CFG80211_CERTIFICATION_ONUS | |
57b5ce07 | 1122 | /* Core specific check */ |
2f92212b JB |
1123 | static enum reg_request_treatment |
1124 | reg_ignore_cell_hint(struct regulatory_request *pending_request) | |
57b5ce07 | 1125 | { |
c492db37 JB |
1126 | struct regulatory_request *lr = get_last_request(); |
1127 | ||
57b5ce07 | 1128 | if (!reg_num_devs_support_basehint) |
2f92212b | 1129 | return REG_REQ_IGNORE; |
57b5ce07 | 1130 | |
c492db37 | 1131 | if (reg_request_cell_base(lr) && |
1a919318 | 1132 | !regdom_changes(pending_request->alpha2)) |
2f92212b | 1133 | return REG_REQ_ALREADY_SET; |
1a919318 | 1134 | |
2f92212b | 1135 | return REG_REQ_OK; |
57b5ce07 LR |
1136 | } |
1137 | ||
1138 | /* Device specific check */ | |
1139 | static bool reg_dev_ignore_cell_hint(struct wiphy *wiphy) | |
1140 | { | |
1a919318 | 1141 | return !(wiphy->features & NL80211_FEATURE_CELL_BASE_REG_HINTS); |
57b5ce07 LR |
1142 | } |
1143 | #else | |
1144 | static int reg_ignore_cell_hint(struct regulatory_request *pending_request) | |
1145 | { | |
2f92212b | 1146 | return REG_REQ_IGNORE; |
57b5ce07 | 1147 | } |
1a919318 JB |
1148 | |
1149 | static bool reg_dev_ignore_cell_hint(struct wiphy *wiphy) | |
57b5ce07 LR |
1150 | { |
1151 | return true; | |
1152 | } | |
1153 | #endif | |
1154 | ||
fa1fb9cb LR |
1155 | static bool wiphy_strict_alpha2_regd(struct wiphy *wiphy) |
1156 | { | |
a2f73b6c LR |
1157 | if (wiphy->regulatory_flags & REGULATORY_STRICT_REG && |
1158 | !(wiphy->regulatory_flags & REGULATORY_CUSTOM_REG)) | |
fa1fb9cb LR |
1159 | return true; |
1160 | return false; | |
1161 | } | |
57b5ce07 | 1162 | |
7db90f4a LR |
1163 | static bool ignore_reg_update(struct wiphy *wiphy, |
1164 | enum nl80211_reg_initiator initiator) | |
14b9815a | 1165 | { |
c492db37 JB |
1166 | struct regulatory_request *lr = get_last_request(); |
1167 | ||
1168 | if (!lr) { | |
034c6d6e LR |
1169 | REG_DBG_PRINT("Ignoring regulatory request set by %s " |
1170 | "since last_request is not set\n", | |
926a0a09 | 1171 | reg_initiator_name(initiator)); |
14b9815a | 1172 | return true; |
926a0a09 LR |
1173 | } |
1174 | ||
7db90f4a | 1175 | if (initiator == NL80211_REGDOM_SET_BY_CORE && |
a2f73b6c | 1176 | wiphy->regulatory_flags & REGULATORY_CUSTOM_REG) { |
034c6d6e LR |
1177 | REG_DBG_PRINT("Ignoring regulatory request set by %s " |
1178 | "since the driver uses its own custom " | |
1179 | "regulatory domain\n", | |
926a0a09 | 1180 | reg_initiator_name(initiator)); |
14b9815a | 1181 | return true; |
926a0a09 LR |
1182 | } |
1183 | ||
fb1fc7ad LR |
1184 | /* |
1185 | * wiphy->regd will be set once the device has its own | |
1186 | * desired regulatory domain set | |
1187 | */ | |
fa1fb9cb | 1188 | if (wiphy_strict_alpha2_regd(wiphy) && !wiphy->regd && |
749b527b | 1189 | initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && |
c492db37 | 1190 | !is_world_regdom(lr->alpha2)) { |
034c6d6e LR |
1191 | REG_DBG_PRINT("Ignoring regulatory request set by %s " |
1192 | "since the driver requires its own regulatory " | |
1193 | "domain to be set first\n", | |
926a0a09 | 1194 | reg_initiator_name(initiator)); |
14b9815a | 1195 | return true; |
926a0a09 LR |
1196 | } |
1197 | ||
c492db37 | 1198 | if (reg_request_cell_base(lr)) |
57b5ce07 LR |
1199 | return reg_dev_ignore_cell_hint(wiphy); |
1200 | ||
14b9815a LR |
1201 | return false; |
1202 | } | |
1203 | ||
3195e489 LR |
1204 | static bool reg_is_world_roaming(struct wiphy *wiphy) |
1205 | { | |
1206 | const struct ieee80211_regdomain *cr = get_cfg80211_regdom(); | |
1207 | const struct ieee80211_regdomain *wr = get_wiphy_regdom(wiphy); | |
1208 | struct regulatory_request *lr = get_last_request(); | |
1209 | ||
1210 | if (is_world_regdom(cr->alpha2) || (wr && is_world_regdom(wr->alpha2))) | |
1211 | return true; | |
1212 | ||
1213 | if (lr && lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && | |
a2f73b6c | 1214 | wiphy->regulatory_flags & REGULATORY_CUSTOM_REG) |
3195e489 LR |
1215 | return true; |
1216 | ||
1217 | return false; | |
1218 | } | |
1219 | ||
1a919318 | 1220 | static void handle_reg_beacon(struct wiphy *wiphy, unsigned int chan_idx, |
e38f8a7a LR |
1221 | struct reg_beacon *reg_beacon) |
1222 | { | |
e38f8a7a LR |
1223 | struct ieee80211_supported_band *sband; |
1224 | struct ieee80211_channel *chan; | |
6bad8766 LR |
1225 | bool channel_changed = false; |
1226 | struct ieee80211_channel chan_before; | |
e38f8a7a | 1227 | |
e38f8a7a LR |
1228 | sband = wiphy->bands[reg_beacon->chan.band]; |
1229 | chan = &sband->channels[chan_idx]; | |
1230 | ||
1231 | if (likely(chan->center_freq != reg_beacon->chan.center_freq)) | |
1232 | return; | |
1233 | ||
6bad8766 LR |
1234 | if (chan->beacon_found) |
1235 | return; | |
1236 | ||
1237 | chan->beacon_found = true; | |
1238 | ||
0f500a5f LR |
1239 | if (!reg_is_world_roaming(wiphy)) |
1240 | return; | |
1241 | ||
a2f73b6c | 1242 | if (wiphy->regulatory_flags & REGULATORY_DISABLE_BEACON_HINTS) |
37184244 LR |
1243 | return; |
1244 | ||
6bad8766 LR |
1245 | chan_before.center_freq = chan->center_freq; |
1246 | chan_before.flags = chan->flags; | |
1247 | ||
8fe02e16 LR |
1248 | if (chan->flags & IEEE80211_CHAN_NO_IR) { |
1249 | chan->flags &= ~IEEE80211_CHAN_NO_IR; | |
6bad8766 | 1250 | channel_changed = true; |
e38f8a7a LR |
1251 | } |
1252 | ||
6bad8766 LR |
1253 | if (channel_changed) |
1254 | nl80211_send_beacon_hint_event(wiphy, &chan_before, chan); | |
e38f8a7a LR |
1255 | } |
1256 | ||
1257 | /* | |
1258 | * Called when a scan on a wiphy finds a beacon on | |
1259 | * new channel | |
1260 | */ | |
1261 | static void wiphy_update_new_beacon(struct wiphy *wiphy, | |
1262 | struct reg_beacon *reg_beacon) | |
1263 | { | |
1264 | unsigned int i; | |
1265 | struct ieee80211_supported_band *sband; | |
1266 | ||
e38f8a7a LR |
1267 | if (!wiphy->bands[reg_beacon->chan.band]) |
1268 | return; | |
1269 | ||
1270 | sband = wiphy->bands[reg_beacon->chan.band]; | |
1271 | ||
1272 | for (i = 0; i < sband->n_channels; i++) | |
1273 | handle_reg_beacon(wiphy, i, reg_beacon); | |
1274 | } | |
1275 | ||
1276 | /* | |
1277 | * Called upon reg changes or a new wiphy is added | |
1278 | */ | |
1279 | static void wiphy_update_beacon_reg(struct wiphy *wiphy) | |
1280 | { | |
1281 | unsigned int i; | |
1282 | struct ieee80211_supported_band *sband; | |
1283 | struct reg_beacon *reg_beacon; | |
1284 | ||
e38f8a7a LR |
1285 | list_for_each_entry(reg_beacon, ®_beacon_list, list) { |
1286 | if (!wiphy->bands[reg_beacon->chan.band]) | |
1287 | continue; | |
1288 | sband = wiphy->bands[reg_beacon->chan.band]; | |
1289 | for (i = 0; i < sband->n_channels; i++) | |
1290 | handle_reg_beacon(wiphy, i, reg_beacon); | |
1291 | } | |
1292 | } | |
1293 | ||
e38f8a7a LR |
1294 | /* Reap the advantages of previously found beacons */ |
1295 | static void reg_process_beacons(struct wiphy *wiphy) | |
1296 | { | |
b1ed8ddd LR |
1297 | /* |
1298 | * Means we are just firing up cfg80211, so no beacons would | |
1299 | * have been processed yet. | |
1300 | */ | |
1301 | if (!last_request) | |
1302 | return; | |
e38f8a7a LR |
1303 | wiphy_update_beacon_reg(wiphy); |
1304 | } | |
1305 | ||
1a919318 | 1306 | static bool is_ht40_allowed(struct ieee80211_channel *chan) |
038659e7 LR |
1307 | { |
1308 | if (!chan) | |
1a919318 | 1309 | return false; |
038659e7 | 1310 | if (chan->flags & IEEE80211_CHAN_DISABLED) |
1a919318 | 1311 | return false; |
038659e7 | 1312 | /* This would happen when regulatory rules disallow HT40 completely */ |
55b183ad FF |
1313 | if ((chan->flags & IEEE80211_CHAN_NO_HT40) == IEEE80211_CHAN_NO_HT40) |
1314 | return false; | |
1315 | return true; | |
038659e7 LR |
1316 | } |
1317 | ||
1318 | static void reg_process_ht_flags_channel(struct wiphy *wiphy, | |
fdc9d7b2 | 1319 | struct ieee80211_channel *channel) |
038659e7 | 1320 | { |
fdc9d7b2 | 1321 | struct ieee80211_supported_band *sband = wiphy->bands[channel->band]; |
038659e7 LR |
1322 | struct ieee80211_channel *channel_before = NULL, *channel_after = NULL; |
1323 | unsigned int i; | |
1324 | ||
1a919318 | 1325 | if (!is_ht40_allowed(channel)) { |
038659e7 LR |
1326 | channel->flags |= IEEE80211_CHAN_NO_HT40; |
1327 | return; | |
1328 | } | |
1329 | ||
1330 | /* | |
1331 | * We need to ensure the extension channels exist to | |
1332 | * be able to use HT40- or HT40+, this finds them (or not) | |
1333 | */ | |
1334 | for (i = 0; i < sband->n_channels; i++) { | |
1335 | struct ieee80211_channel *c = &sband->channels[i]; | |
1a919318 | 1336 | |
038659e7 LR |
1337 | if (c->center_freq == (channel->center_freq - 20)) |
1338 | channel_before = c; | |
1339 | if (c->center_freq == (channel->center_freq + 20)) | |
1340 | channel_after = c; | |
1341 | } | |
1342 | ||
1343 | /* | |
1344 | * Please note that this assumes target bandwidth is 20 MHz, | |
1345 | * if that ever changes we also need to change the below logic | |
1346 | * to include that as well. | |
1347 | */ | |
1a919318 | 1348 | if (!is_ht40_allowed(channel_before)) |
689da1b3 | 1349 | channel->flags |= IEEE80211_CHAN_NO_HT40MINUS; |
038659e7 | 1350 | else |
689da1b3 | 1351 | channel->flags &= ~IEEE80211_CHAN_NO_HT40MINUS; |
038659e7 | 1352 | |
1a919318 | 1353 | if (!is_ht40_allowed(channel_after)) |
689da1b3 | 1354 | channel->flags |= IEEE80211_CHAN_NO_HT40PLUS; |
038659e7 | 1355 | else |
689da1b3 | 1356 | channel->flags &= ~IEEE80211_CHAN_NO_HT40PLUS; |
038659e7 LR |
1357 | } |
1358 | ||
1359 | static void reg_process_ht_flags_band(struct wiphy *wiphy, | |
fdc9d7b2 | 1360 | struct ieee80211_supported_band *sband) |
038659e7 LR |
1361 | { |
1362 | unsigned int i; | |
038659e7 | 1363 | |
fdc9d7b2 JB |
1364 | if (!sband) |
1365 | return; | |
038659e7 LR |
1366 | |
1367 | for (i = 0; i < sband->n_channels; i++) | |
fdc9d7b2 | 1368 | reg_process_ht_flags_channel(wiphy, &sband->channels[i]); |
038659e7 LR |
1369 | } |
1370 | ||
1371 | static void reg_process_ht_flags(struct wiphy *wiphy) | |
1372 | { | |
1373 | enum ieee80211_band band; | |
1374 | ||
1375 | if (!wiphy) | |
1376 | return; | |
1377 | ||
fdc9d7b2 JB |
1378 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) |
1379 | reg_process_ht_flags_band(wiphy, wiphy->bands[band]); | |
038659e7 LR |
1380 | } |
1381 | ||
0e3802db LR |
1382 | static void reg_call_notifier(struct wiphy *wiphy, |
1383 | struct regulatory_request *request) | |
1384 | { | |
1385 | if (wiphy->reg_notifier) | |
1386 | wiphy->reg_notifier(wiphy, request); | |
1387 | } | |
1388 | ||
eac03e38 SN |
1389 | static void wiphy_update_regulatory(struct wiphy *wiphy, |
1390 | enum nl80211_reg_initiator initiator) | |
b2e1b302 LR |
1391 | { |
1392 | enum ieee80211_band band; | |
c492db37 | 1393 | struct regulatory_request *lr = get_last_request(); |
eac03e38 | 1394 | |
0e3802db LR |
1395 | if (ignore_reg_update(wiphy, initiator)) { |
1396 | /* | |
1397 | * Regulatory updates set by CORE are ignored for custom | |
1398 | * regulatory cards. Let us notify the changes to the driver, | |
1399 | * as some drivers used this to restore its orig_* reg domain. | |
1400 | */ | |
1401 | if (initiator == NL80211_REGDOM_SET_BY_CORE && | |
a2f73b6c | 1402 | wiphy->regulatory_flags & REGULATORY_CUSTOM_REG) |
0e3802db | 1403 | reg_call_notifier(wiphy, lr); |
a203c2aa | 1404 | return; |
0e3802db | 1405 | } |
a203c2aa | 1406 | |
c492db37 | 1407 | lr->dfs_region = get_cfg80211_regdom()->dfs_region; |
b68e6b3b | 1408 | |
fdc9d7b2 JB |
1409 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) |
1410 | handle_band(wiphy, initiator, wiphy->bands[band]); | |
a203c2aa | 1411 | |
e38f8a7a | 1412 | reg_process_beacons(wiphy); |
038659e7 | 1413 | reg_process_ht_flags(wiphy); |
0e3802db | 1414 | reg_call_notifier(wiphy, lr); |
b2e1b302 LR |
1415 | } |
1416 | ||
d7549cbb SN |
1417 | static void update_all_wiphy_regulatory(enum nl80211_reg_initiator initiator) |
1418 | { | |
1419 | struct cfg80211_registered_device *rdev; | |
4a38994f | 1420 | struct wiphy *wiphy; |
d7549cbb | 1421 | |
5fe231e8 | 1422 | ASSERT_RTNL(); |
458f4f9e | 1423 | |
4a38994f RM |
1424 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) { |
1425 | wiphy = &rdev->wiphy; | |
1426 | wiphy_update_regulatory(wiphy, initiator); | |
4a38994f | 1427 | } |
d7549cbb SN |
1428 | } |
1429 | ||
1fa25e41 | 1430 | static void handle_channel_custom(struct wiphy *wiphy, |
fdc9d7b2 | 1431 | struct ieee80211_channel *chan, |
1fa25e41 LR |
1432 | const struct ieee80211_regdomain *regd) |
1433 | { | |
038659e7 | 1434 | u32 bw_flags = 0; |
1fa25e41 LR |
1435 | const struct ieee80211_reg_rule *reg_rule = NULL; |
1436 | const struct ieee80211_power_rule *power_rule = NULL; | |
038659e7 | 1437 | const struct ieee80211_freq_range *freq_range = NULL; |
97524820 | 1438 | u32 max_bandwidth_khz; |
ac46d48e | 1439 | |
361c9c8b JB |
1440 | reg_rule = freq_reg_info_regd(wiphy, MHZ_TO_KHZ(chan->center_freq), |
1441 | regd); | |
1fa25e41 | 1442 | |
361c9c8b | 1443 | if (IS_ERR(reg_rule)) { |
fe7ef5e9 JB |
1444 | REG_DBG_PRINT("Disabling freq %d MHz as custom regd has no rule that fits it\n", |
1445 | chan->center_freq); | |
cc493e4f LR |
1446 | chan->orig_flags |= IEEE80211_CHAN_DISABLED; |
1447 | chan->flags = chan->orig_flags; | |
1fa25e41 LR |
1448 | return; |
1449 | } | |
1450 | ||
b0dfd2ea | 1451 | chan_reg_rule_print_dbg(regd, chan, reg_rule); |
e702d3cf | 1452 | |
1fa25e41 | 1453 | power_rule = ®_rule->power_rule; |
038659e7 LR |
1454 | freq_range = ®_rule->freq_range; |
1455 | ||
97524820 JD |
1456 | max_bandwidth_khz = freq_range->max_bandwidth_khz; |
1457 | /* Check if auto calculation requested */ | |
b0dfd2ea | 1458 | if (reg_rule->flags & NL80211_RRF_AUTO_BW) |
97524820 JD |
1459 | max_bandwidth_khz = reg_get_max_bandwidth(regd, reg_rule); |
1460 | ||
1461 | if (max_bandwidth_khz < MHZ_TO_KHZ(40)) | |
038659e7 | 1462 | bw_flags = IEEE80211_CHAN_NO_HT40; |
97524820 | 1463 | if (max_bandwidth_khz < MHZ_TO_KHZ(80)) |
c7a6ee27 | 1464 | bw_flags |= IEEE80211_CHAN_NO_80MHZ; |
97524820 | 1465 | if (max_bandwidth_khz < MHZ_TO_KHZ(160)) |
c7a6ee27 | 1466 | bw_flags |= IEEE80211_CHAN_NO_160MHZ; |
1fa25e41 | 1467 | |
038659e7 | 1468 | chan->flags |= map_regdom_flags(reg_rule->flags) | bw_flags; |
1fa25e41 | 1469 | chan->max_antenna_gain = (int) MBI_TO_DBI(power_rule->max_antenna_gain); |
279f0f55 FF |
1470 | chan->max_reg_power = chan->max_power = |
1471 | (int) MBM_TO_DBM(power_rule->max_eirp); | |
1fa25e41 LR |
1472 | } |
1473 | ||
fdc9d7b2 JB |
1474 | static void handle_band_custom(struct wiphy *wiphy, |
1475 | struct ieee80211_supported_band *sband, | |
1fa25e41 LR |
1476 | const struct ieee80211_regdomain *regd) |
1477 | { | |
1478 | unsigned int i; | |
1fa25e41 | 1479 | |
fdc9d7b2 JB |
1480 | if (!sband) |
1481 | return; | |
1fa25e41 LR |
1482 | |
1483 | for (i = 0; i < sband->n_channels; i++) | |
fdc9d7b2 | 1484 | handle_channel_custom(wiphy, &sband->channels[i], regd); |
1fa25e41 LR |
1485 | } |
1486 | ||
1487 | /* Used by drivers prior to wiphy registration */ | |
1488 | void wiphy_apply_custom_regulatory(struct wiphy *wiphy, | |
1489 | const struct ieee80211_regdomain *regd) | |
1490 | { | |
1491 | enum ieee80211_band band; | |
bbcf3f02 | 1492 | unsigned int bands_set = 0; |
ac46d48e | 1493 | |
a2f73b6c LR |
1494 | WARN(!(wiphy->regulatory_flags & REGULATORY_CUSTOM_REG), |
1495 | "wiphy should have REGULATORY_CUSTOM_REG\n"); | |
1496 | wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG; | |
222ea581 | 1497 | |
1fa25e41 | 1498 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) { |
bbcf3f02 LR |
1499 | if (!wiphy->bands[band]) |
1500 | continue; | |
fdc9d7b2 | 1501 | handle_band_custom(wiphy, wiphy->bands[band], regd); |
bbcf3f02 | 1502 | bands_set++; |
b2e1b302 | 1503 | } |
bbcf3f02 LR |
1504 | |
1505 | /* | |
1506 | * no point in calling this if it won't have any effect | |
1a919318 | 1507 | * on your device's supported bands. |
bbcf3f02 LR |
1508 | */ |
1509 | WARN_ON(!bands_set); | |
b2e1b302 | 1510 | } |
1fa25e41 LR |
1511 | EXPORT_SYMBOL(wiphy_apply_custom_regulatory); |
1512 | ||
b2e253cf LR |
1513 | static void reg_set_request_processed(void) |
1514 | { | |
1515 | bool need_more_processing = false; | |
c492db37 | 1516 | struct regulatory_request *lr = get_last_request(); |
b2e253cf | 1517 | |
c492db37 | 1518 | lr->processed = true; |
b2e253cf LR |
1519 | |
1520 | spin_lock(®_requests_lock); | |
1521 | if (!list_empty(®_requests_list)) | |
1522 | need_more_processing = true; | |
1523 | spin_unlock(®_requests_lock); | |
1524 | ||
c492db37 | 1525 | if (lr->initiator == NL80211_REGDOM_SET_BY_USER) |
fe20b39e | 1526 | cancel_delayed_work(®_timeout); |
a90c7a31 | 1527 | |
b2e253cf LR |
1528 | if (need_more_processing) |
1529 | schedule_work(®_work); | |
1530 | } | |
1531 | ||
b3eb7f3f LR |
1532 | /** |
1533 | * reg_process_hint_core - process core regulatory requests | |
1534 | * @pending_request: a pending core regulatory request | |
1535 | * | |
1536 | * The wireless subsystem can use this function to process | |
1537 | * a regulatory request issued by the regulatory core. | |
1538 | * | |
1539 | * Returns one of the different reg request treatment values. | |
1540 | */ | |
1541 | static enum reg_request_treatment | |
1542 | reg_process_hint_core(struct regulatory_request *core_request) | |
1543 | { | |
b3eb7f3f LR |
1544 | |
1545 | core_request->intersect = false; | |
1546 | core_request->processed = false; | |
5ad6ef5e | 1547 | |
05f1a3ea | 1548 | reg_update_last_request(core_request); |
b3eb7f3f | 1549 | |
fe6631ff | 1550 | return reg_call_crda(core_request); |
b3eb7f3f LR |
1551 | } |
1552 | ||
0d97a619 LR |
1553 | static enum reg_request_treatment |
1554 | __reg_process_hint_user(struct regulatory_request *user_request) | |
1555 | { | |
1556 | struct regulatory_request *lr = get_last_request(); | |
1557 | ||
1558 | if (reg_request_cell_base(user_request)) | |
1559 | return reg_ignore_cell_hint(user_request); | |
1560 | ||
1561 | if (reg_request_cell_base(lr)) | |
1562 | return REG_REQ_IGNORE; | |
1563 | ||
1564 | if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) | |
1565 | return REG_REQ_INTERSECT; | |
1566 | /* | |
1567 | * If the user knows better the user should set the regdom | |
1568 | * to their country before the IE is picked up | |
1569 | */ | |
1570 | if (lr->initiator == NL80211_REGDOM_SET_BY_USER && | |
1571 | lr->intersect) | |
1572 | return REG_REQ_IGNORE; | |
1573 | /* | |
1574 | * Process user requests only after previous user/driver/core | |
1575 | * requests have been processed | |
1576 | */ | |
1577 | if ((lr->initiator == NL80211_REGDOM_SET_BY_CORE || | |
1578 | lr->initiator == NL80211_REGDOM_SET_BY_DRIVER || | |
1579 | lr->initiator == NL80211_REGDOM_SET_BY_USER) && | |
1580 | regdom_changes(lr->alpha2)) | |
1581 | return REG_REQ_IGNORE; | |
1582 | ||
1583 | if (!regdom_changes(user_request->alpha2)) | |
1584 | return REG_REQ_ALREADY_SET; | |
1585 | ||
1586 | return REG_REQ_OK; | |
1587 | } | |
1588 | ||
1589 | /** | |
1590 | * reg_process_hint_user - process user regulatory requests | |
1591 | * @user_request: a pending user regulatory request | |
1592 | * | |
1593 | * The wireless subsystem can use this function to process | |
1594 | * a regulatory request initiated by userspace. | |
1595 | * | |
1596 | * Returns one of the different reg request treatment values. | |
1597 | */ | |
1598 | static enum reg_request_treatment | |
1599 | reg_process_hint_user(struct regulatory_request *user_request) | |
1600 | { | |
1601 | enum reg_request_treatment treatment; | |
0d97a619 LR |
1602 | |
1603 | treatment = __reg_process_hint_user(user_request); | |
1604 | if (treatment == REG_REQ_IGNORE || | |
1605 | treatment == REG_REQ_ALREADY_SET) { | |
1606 | kfree(user_request); | |
1607 | return treatment; | |
1608 | } | |
1609 | ||
0d97a619 LR |
1610 | user_request->intersect = treatment == REG_REQ_INTERSECT; |
1611 | user_request->processed = false; | |
5ad6ef5e | 1612 | |
05f1a3ea | 1613 | reg_update_last_request(user_request); |
0d97a619 LR |
1614 | |
1615 | user_alpha2[0] = user_request->alpha2[0]; | |
1616 | user_alpha2[1] = user_request->alpha2[1]; | |
1617 | ||
fe6631ff | 1618 | return reg_call_crda(user_request); |
0d97a619 LR |
1619 | } |
1620 | ||
21636c7f LR |
1621 | static enum reg_request_treatment |
1622 | __reg_process_hint_driver(struct regulatory_request *driver_request) | |
1623 | { | |
1624 | struct regulatory_request *lr = get_last_request(); | |
1625 | ||
1626 | if (lr->initiator == NL80211_REGDOM_SET_BY_CORE) { | |
1627 | if (regdom_changes(driver_request->alpha2)) | |
1628 | return REG_REQ_OK; | |
1629 | return REG_REQ_ALREADY_SET; | |
1630 | } | |
1631 | ||
1632 | /* | |
1633 | * This would happen if you unplug and plug your card | |
1634 | * back in or if you add a new device for which the previously | |
1635 | * loaded card also agrees on the regulatory domain. | |
1636 | */ | |
1637 | if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER && | |
1638 | !regdom_changes(driver_request->alpha2)) | |
1639 | return REG_REQ_ALREADY_SET; | |
1640 | ||
1641 | return REG_REQ_INTERSECT; | |
1642 | } | |
1643 | ||
1644 | /** | |
1645 | * reg_process_hint_driver - process driver regulatory requests | |
1646 | * @driver_request: a pending driver regulatory request | |
1647 | * | |
1648 | * The wireless subsystem can use this function to process | |
1649 | * a regulatory request issued by an 802.11 driver. | |
1650 | * | |
1651 | * Returns one of the different reg request treatment values. | |
1652 | */ | |
1653 | static enum reg_request_treatment | |
1654 | reg_process_hint_driver(struct wiphy *wiphy, | |
1655 | struct regulatory_request *driver_request) | |
1656 | { | |
1657 | const struct ieee80211_regdomain *regd; | |
1658 | enum reg_request_treatment treatment; | |
21636c7f LR |
1659 | |
1660 | treatment = __reg_process_hint_driver(driver_request); | |
1661 | ||
1662 | switch (treatment) { | |
1663 | case REG_REQ_OK: | |
1664 | break; | |
1665 | case REG_REQ_IGNORE: | |
1666 | kfree(driver_request); | |
1667 | return treatment; | |
1668 | case REG_REQ_INTERSECT: | |
1669 | /* fall through */ | |
1670 | case REG_REQ_ALREADY_SET: | |
1671 | regd = reg_copy_regd(get_cfg80211_regdom()); | |
1672 | if (IS_ERR(regd)) { | |
1673 | kfree(driver_request); | |
1674 | return REG_REQ_IGNORE; | |
1675 | } | |
1676 | rcu_assign_pointer(wiphy->regd, regd); | |
1677 | } | |
1678 | ||
21636c7f LR |
1679 | |
1680 | driver_request->intersect = treatment == REG_REQ_INTERSECT; | |
1681 | driver_request->processed = false; | |
5ad6ef5e | 1682 | |
05f1a3ea | 1683 | reg_update_last_request(driver_request); |
21636c7f LR |
1684 | |
1685 | /* | |
1686 | * Since CRDA will not be called in this case as we already | |
1687 | * have applied the requested regulatory domain before we just | |
1688 | * inform userspace we have processed the request | |
1689 | */ | |
1690 | if (treatment == REG_REQ_ALREADY_SET) { | |
1691 | nl80211_send_reg_change_event(driver_request); | |
1692 | reg_set_request_processed(); | |
1693 | return treatment; | |
1694 | } | |
1695 | ||
fe6631ff | 1696 | return reg_call_crda(driver_request); |
21636c7f LR |
1697 | } |
1698 | ||
b23e7a9e LR |
1699 | static enum reg_request_treatment |
1700 | __reg_process_hint_country_ie(struct wiphy *wiphy, | |
1701 | struct regulatory_request *country_ie_request) | |
1702 | { | |
1703 | struct wiphy *last_wiphy = NULL; | |
1704 | struct regulatory_request *lr = get_last_request(); | |
1705 | ||
1706 | if (reg_request_cell_base(lr)) { | |
1707 | /* Trust a Cell base station over the AP's country IE */ | |
1708 | if (regdom_changes(country_ie_request->alpha2)) | |
1709 | return REG_REQ_IGNORE; | |
1710 | return REG_REQ_ALREADY_SET; | |
2a901468 LR |
1711 | } else { |
1712 | if (wiphy->regulatory_flags & REGULATORY_COUNTRY_IE_IGNORE) | |
1713 | return REG_REQ_IGNORE; | |
b23e7a9e LR |
1714 | } |
1715 | ||
b23e7a9e LR |
1716 | if (unlikely(!is_an_alpha2(country_ie_request->alpha2))) |
1717 | return -EINVAL; | |
2f1c6c57 LR |
1718 | |
1719 | if (lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE) | |
1720 | return REG_REQ_OK; | |
1721 | ||
1722 | last_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx); | |
1723 | ||
1724 | if (last_wiphy != wiphy) { | |
b23e7a9e | 1725 | /* |
2f1c6c57 LR |
1726 | * Two cards with two APs claiming different |
1727 | * Country IE alpha2s. We could | |
1728 | * intersect them, but that seems unlikely | |
1729 | * to be correct. Reject second one for now. | |
b23e7a9e | 1730 | */ |
2f1c6c57 LR |
1731 | if (regdom_changes(country_ie_request->alpha2)) |
1732 | return REG_REQ_IGNORE; | |
b23e7a9e LR |
1733 | return REG_REQ_ALREADY_SET; |
1734 | } | |
2f1c6c57 LR |
1735 | /* |
1736 | * Two consecutive Country IE hints on the same wiphy. | |
1737 | * This should be picked up early by the driver/stack | |
1738 | */ | |
1739 | if (WARN_ON(regdom_changes(country_ie_request->alpha2))) | |
1740 | return REG_REQ_OK; | |
1741 | return REG_REQ_ALREADY_SET; | |
b23e7a9e LR |
1742 | } |
1743 | ||
d1c96a9a | 1744 | /** |
b23e7a9e LR |
1745 | * reg_process_hint_country_ie - process regulatory requests from country IEs |
1746 | * @country_ie_request: a regulatory request from a country IE | |
d1c96a9a | 1747 | * |
b23e7a9e LR |
1748 | * The wireless subsystem can use this function to process |
1749 | * a regulatory request issued by a country Information Element. | |
d1c96a9a | 1750 | * |
2f92212b | 1751 | * Returns one of the different reg request treatment values. |
d1c96a9a | 1752 | */ |
2f92212b | 1753 | static enum reg_request_treatment |
b23e7a9e LR |
1754 | reg_process_hint_country_ie(struct wiphy *wiphy, |
1755 | struct regulatory_request *country_ie_request) | |
b2e1b302 | 1756 | { |
2f92212b | 1757 | enum reg_request_treatment treatment; |
761cf7ec | 1758 | |
b23e7a9e | 1759 | treatment = __reg_process_hint_country_ie(wiphy, country_ie_request); |
9c96477d | 1760 | |
2f92212b | 1761 | switch (treatment) { |
2f92212b JB |
1762 | case REG_REQ_OK: |
1763 | break; | |
b23e7a9e LR |
1764 | case REG_REQ_IGNORE: |
1765 | /* fall through */ | |
1766 | case REG_REQ_ALREADY_SET: | |
1767 | kfree(country_ie_request); | |
1768 | return treatment; | |
1769 | case REG_REQ_INTERSECT: | |
1770 | kfree(country_ie_request); | |
fb1fc7ad | 1771 | /* |
b23e7a9e LR |
1772 | * This doesn't happen yet, not sure we |
1773 | * ever want to support it for this case. | |
fb1fc7ad | 1774 | */ |
b23e7a9e LR |
1775 | WARN_ONCE(1, "Unexpected intersection for country IEs"); |
1776 | return REG_REQ_IGNORE; | |
3e0c3ff3 | 1777 | } |
b2e1b302 | 1778 | |
b23e7a9e LR |
1779 | country_ie_request->intersect = false; |
1780 | country_ie_request->processed = false; | |
5ad6ef5e | 1781 | |
05f1a3ea | 1782 | reg_update_last_request(country_ie_request); |
3e0c3ff3 | 1783 | |
fe6631ff | 1784 | return reg_call_crda(country_ie_request); |
b2e1b302 LR |
1785 | } |
1786 | ||
30a548c7 | 1787 | /* This processes *all* regulatory hints */ |
1daa37c7 | 1788 | static void reg_process_hint(struct regulatory_request *reg_request) |
fe33eb39 | 1789 | { |
fe33eb39 | 1790 | struct wiphy *wiphy = NULL; |
b3eb7f3f | 1791 | enum reg_request_treatment treatment; |
fe33eb39 | 1792 | |
f4173766 | 1793 | if (reg_request->wiphy_idx != WIPHY_IDX_INVALID) |
fe33eb39 LR |
1794 | wiphy = wiphy_idx_to_wiphy(reg_request->wiphy_idx); |
1795 | ||
b3eb7f3f LR |
1796 | switch (reg_request->initiator) { |
1797 | case NL80211_REGDOM_SET_BY_CORE: | |
1798 | reg_process_hint_core(reg_request); | |
1799 | return; | |
1800 | case NL80211_REGDOM_SET_BY_USER: | |
0d97a619 LR |
1801 | treatment = reg_process_hint_user(reg_request); |
1802 | if (treatment == REG_REQ_OK || | |
1803 | treatment == REG_REQ_ALREADY_SET) | |
1804 | return; | |
845f3351 SD |
1805 | queue_delayed_work(system_power_efficient_wq, |
1806 | ®_timeout, msecs_to_jiffies(3142)); | |
0d97a619 | 1807 | return; |
b3eb7f3f | 1808 | case NL80211_REGDOM_SET_BY_DRIVER: |
772f0389 IP |
1809 | if (!wiphy) |
1810 | goto out_free; | |
21636c7f LR |
1811 | treatment = reg_process_hint_driver(wiphy, reg_request); |
1812 | break; | |
b3eb7f3f | 1813 | case NL80211_REGDOM_SET_BY_COUNTRY_IE: |
772f0389 IP |
1814 | if (!wiphy) |
1815 | goto out_free; | |
b23e7a9e | 1816 | treatment = reg_process_hint_country_ie(wiphy, reg_request); |
b3eb7f3f LR |
1817 | break; |
1818 | default: | |
1819 | WARN(1, "invalid initiator %d\n", reg_request->initiator); | |
772f0389 | 1820 | goto out_free; |
b3eb7f3f LR |
1821 | } |
1822 | ||
b23e7a9e LR |
1823 | /* This is required so that the orig_* parameters are saved */ |
1824 | if (treatment == REG_REQ_ALREADY_SET && wiphy && | |
a2f73b6c | 1825 | wiphy->regulatory_flags & REGULATORY_STRICT_REG) |
b23e7a9e | 1826 | wiphy_update_regulatory(wiphy, reg_request->initiator); |
772f0389 IP |
1827 | |
1828 | return; | |
1829 | ||
1830 | out_free: | |
1831 | kfree(reg_request); | |
fe33eb39 LR |
1832 | } |
1833 | ||
b2e253cf LR |
1834 | /* |
1835 | * Processes regulatory hints, this is all the NL80211_REGDOM_SET_BY_* | |
1836 | * Regulatory hints come on a first come first serve basis and we | |
1837 | * must process each one atomically. | |
1838 | */ | |
fe33eb39 | 1839 | static void reg_process_pending_hints(void) |
b0e2880b | 1840 | { |
c492db37 | 1841 | struct regulatory_request *reg_request, *lr; |
fe33eb39 | 1842 | |
c492db37 | 1843 | lr = get_last_request(); |
b0e2880b | 1844 | |
b2e253cf | 1845 | /* When last_request->processed becomes true this will be rescheduled */ |
c492db37 | 1846 | if (lr && !lr->processed) { |
1a919318 | 1847 | REG_DBG_PRINT("Pending regulatory request, waiting for it to be processed...\n"); |
5fe231e8 | 1848 | return; |
b2e253cf LR |
1849 | } |
1850 | ||
fe33eb39 | 1851 | spin_lock(®_requests_lock); |
fe33eb39 | 1852 | |
b2e253cf | 1853 | if (list_empty(®_requests_list)) { |
d951c1dd | 1854 | spin_unlock(®_requests_lock); |
5fe231e8 | 1855 | return; |
fe33eb39 | 1856 | } |
b2e253cf LR |
1857 | |
1858 | reg_request = list_first_entry(®_requests_list, | |
1859 | struct regulatory_request, | |
1860 | list); | |
1861 | list_del_init(®_request->list); | |
1862 | ||
fe33eb39 | 1863 | spin_unlock(®_requests_lock); |
b0e2880b | 1864 | |
1daa37c7 | 1865 | reg_process_hint(reg_request); |
fe33eb39 LR |
1866 | } |
1867 | ||
e38f8a7a LR |
1868 | /* Processes beacon hints -- this has nothing to do with country IEs */ |
1869 | static void reg_process_pending_beacon_hints(void) | |
1870 | { | |
79c97e97 | 1871 | struct cfg80211_registered_device *rdev; |
e38f8a7a LR |
1872 | struct reg_beacon *pending_beacon, *tmp; |
1873 | ||
e38f8a7a LR |
1874 | /* This goes through the _pending_ beacon list */ |
1875 | spin_lock_bh(®_pending_beacons_lock); | |
1876 | ||
e38f8a7a LR |
1877 | list_for_each_entry_safe(pending_beacon, tmp, |
1878 | ®_pending_beacons, list) { | |
e38f8a7a LR |
1879 | list_del_init(&pending_beacon->list); |
1880 | ||
1881 | /* Applies the beacon hint to current wiphys */ | |
79c97e97 JB |
1882 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) |
1883 | wiphy_update_new_beacon(&rdev->wiphy, pending_beacon); | |
e38f8a7a LR |
1884 | |
1885 | /* Remembers the beacon hint for new wiphys or reg changes */ | |
1886 | list_add_tail(&pending_beacon->list, ®_beacon_list); | |
1887 | } | |
1888 | ||
1889 | spin_unlock_bh(®_pending_beacons_lock); | |
e38f8a7a LR |
1890 | } |
1891 | ||
fe33eb39 LR |
1892 | static void reg_todo(struct work_struct *work) |
1893 | { | |
5fe231e8 | 1894 | rtnl_lock(); |
fe33eb39 | 1895 | reg_process_pending_hints(); |
e38f8a7a | 1896 | reg_process_pending_beacon_hints(); |
5fe231e8 | 1897 | rtnl_unlock(); |
fe33eb39 LR |
1898 | } |
1899 | ||
fe33eb39 LR |
1900 | static void queue_regulatory_request(struct regulatory_request *request) |
1901 | { | |
d4f2c881 JB |
1902 | request->alpha2[0] = toupper(request->alpha2[0]); |
1903 | request->alpha2[1] = toupper(request->alpha2[1]); | |
c61029c7 | 1904 | |
fe33eb39 LR |
1905 | spin_lock(®_requests_lock); |
1906 | list_add_tail(&request->list, ®_requests_list); | |
1907 | spin_unlock(®_requests_lock); | |
1908 | ||
1909 | schedule_work(®_work); | |
1910 | } | |
1911 | ||
09d989d1 LR |
1912 | /* |
1913 | * Core regulatory hint -- happens during cfg80211_init() | |
1914 | * and when we restore regulatory settings. | |
1915 | */ | |
ba25c141 LR |
1916 | static int regulatory_hint_core(const char *alpha2) |
1917 | { | |
1918 | struct regulatory_request *request; | |
1919 | ||
1a919318 | 1920 | request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); |
ba25c141 LR |
1921 | if (!request) |
1922 | return -ENOMEM; | |
1923 | ||
1924 | request->alpha2[0] = alpha2[0]; | |
1925 | request->alpha2[1] = alpha2[1]; | |
7db90f4a | 1926 | request->initiator = NL80211_REGDOM_SET_BY_CORE; |
ba25c141 | 1927 | |
31e99729 | 1928 | queue_regulatory_request(request); |
5078b2e3 | 1929 | |
fe33eb39 | 1930 | return 0; |
ba25c141 LR |
1931 | } |
1932 | ||
fe33eb39 | 1933 | /* User hints */ |
57b5ce07 LR |
1934 | int regulatory_hint_user(const char *alpha2, |
1935 | enum nl80211_user_reg_hint_type user_reg_hint_type) | |
b2e1b302 | 1936 | { |
fe33eb39 LR |
1937 | struct regulatory_request *request; |
1938 | ||
fdc9d7b2 JB |
1939 | if (WARN_ON(!alpha2)) |
1940 | return -EINVAL; | |
b2e1b302 | 1941 | |
fe33eb39 LR |
1942 | request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); |
1943 | if (!request) | |
1944 | return -ENOMEM; | |
1945 | ||
f4173766 | 1946 | request->wiphy_idx = WIPHY_IDX_INVALID; |
fe33eb39 LR |
1947 | request->alpha2[0] = alpha2[0]; |
1948 | request->alpha2[1] = alpha2[1]; | |
e12822e1 | 1949 | request->initiator = NL80211_REGDOM_SET_BY_USER; |
57b5ce07 | 1950 | request->user_reg_hint_type = user_reg_hint_type; |
fe33eb39 LR |
1951 | |
1952 | queue_regulatory_request(request); | |
1953 | ||
1954 | return 0; | |
1955 | } | |
1956 | ||
1957 | /* Driver hints */ | |
1958 | int regulatory_hint(struct wiphy *wiphy, const char *alpha2) | |
1959 | { | |
1960 | struct regulatory_request *request; | |
1961 | ||
fdc9d7b2 JB |
1962 | if (WARN_ON(!alpha2 || !wiphy)) |
1963 | return -EINVAL; | |
fe33eb39 | 1964 | |
4f7b9140 LR |
1965 | wiphy->regulatory_flags &= ~REGULATORY_CUSTOM_REG; |
1966 | ||
fe33eb39 LR |
1967 | request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); |
1968 | if (!request) | |
1969 | return -ENOMEM; | |
1970 | ||
1971 | request->wiphy_idx = get_wiphy_idx(wiphy); | |
1972 | ||
fe33eb39 LR |
1973 | request->alpha2[0] = alpha2[0]; |
1974 | request->alpha2[1] = alpha2[1]; | |
7db90f4a | 1975 | request->initiator = NL80211_REGDOM_SET_BY_DRIVER; |
fe33eb39 LR |
1976 | |
1977 | queue_regulatory_request(request); | |
1978 | ||
1979 | return 0; | |
b2e1b302 LR |
1980 | } |
1981 | EXPORT_SYMBOL(regulatory_hint); | |
1982 | ||
789fd033 LR |
1983 | void regulatory_hint_country_ie(struct wiphy *wiphy, enum ieee80211_band band, |
1984 | const u8 *country_ie, u8 country_ie_len) | |
3f2355cb | 1985 | { |
3f2355cb | 1986 | char alpha2[2]; |
3f2355cb | 1987 | enum environment_cap env = ENVIRON_ANY; |
db2424c5 | 1988 | struct regulatory_request *request = NULL, *lr; |
d335fe63 | 1989 | |
3f2355cb LR |
1990 | /* IE len must be evenly divisible by 2 */ |
1991 | if (country_ie_len & 0x01) | |
db2424c5 | 1992 | return; |
3f2355cb LR |
1993 | |
1994 | if (country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN) | |
db2424c5 JB |
1995 | return; |
1996 | ||
1997 | request = kzalloc(sizeof(*request), GFP_KERNEL); | |
1998 | if (!request) | |
1999 | return; | |
3f2355cb | 2000 | |
3f2355cb LR |
2001 | alpha2[0] = country_ie[0]; |
2002 | alpha2[1] = country_ie[1]; | |
2003 | ||
2004 | if (country_ie[2] == 'I') | |
2005 | env = ENVIRON_INDOOR; | |
2006 | else if (country_ie[2] == 'O') | |
2007 | env = ENVIRON_OUTDOOR; | |
2008 | ||
db2424c5 JB |
2009 | rcu_read_lock(); |
2010 | lr = get_last_request(); | |
2011 | ||
2012 | if (unlikely(!lr)) | |
2013 | goto out; | |
2014 | ||
fb1fc7ad | 2015 | /* |
8b19e6ca | 2016 | * We will run this only upon a successful connection on cfg80211. |
4b44c8bc | 2017 | * We leave conflict resolution to the workqueue, where can hold |
5fe231e8 | 2018 | * the RTNL. |
fb1fc7ad | 2019 | */ |
c492db37 JB |
2020 | if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE && |
2021 | lr->wiphy_idx != WIPHY_IDX_INVALID) | |
4b44c8bc | 2022 | goto out; |
3f2355cb | 2023 | |
fe33eb39 | 2024 | request->wiphy_idx = get_wiphy_idx(wiphy); |
4f366c5d JL |
2025 | request->alpha2[0] = alpha2[0]; |
2026 | request->alpha2[1] = alpha2[1]; | |
7db90f4a | 2027 | request->initiator = NL80211_REGDOM_SET_BY_COUNTRY_IE; |
fe33eb39 LR |
2028 | request->country_ie_env = env; |
2029 | ||
fe33eb39 | 2030 | queue_regulatory_request(request); |
db2424c5 | 2031 | request = NULL; |
3f2355cb | 2032 | out: |
db2424c5 JB |
2033 | kfree(request); |
2034 | rcu_read_unlock(); | |
3f2355cb | 2035 | } |
b2e1b302 | 2036 | |
09d989d1 LR |
2037 | static void restore_alpha2(char *alpha2, bool reset_user) |
2038 | { | |
2039 | /* indicates there is no alpha2 to consider for restoration */ | |
2040 | alpha2[0] = '9'; | |
2041 | alpha2[1] = '7'; | |
2042 | ||
2043 | /* The user setting has precedence over the module parameter */ | |
2044 | if (is_user_regdom_saved()) { | |
2045 | /* Unless we're asked to ignore it and reset it */ | |
2046 | if (reset_user) { | |
1a919318 | 2047 | REG_DBG_PRINT("Restoring regulatory settings including user preference\n"); |
09d989d1 LR |
2048 | user_alpha2[0] = '9'; |
2049 | user_alpha2[1] = '7'; | |
2050 | ||
2051 | /* | |
2052 | * If we're ignoring user settings, we still need to | |
2053 | * check the module parameter to ensure we put things | |
2054 | * back as they were for a full restore. | |
2055 | */ | |
2056 | if (!is_world_regdom(ieee80211_regdom)) { | |
1a919318 JB |
2057 | REG_DBG_PRINT("Keeping preference on module parameter ieee80211_regdom: %c%c\n", |
2058 | ieee80211_regdom[0], ieee80211_regdom[1]); | |
09d989d1 LR |
2059 | alpha2[0] = ieee80211_regdom[0]; |
2060 | alpha2[1] = ieee80211_regdom[1]; | |
2061 | } | |
2062 | } else { | |
1a919318 JB |
2063 | REG_DBG_PRINT("Restoring regulatory settings while preserving user preference for: %c%c\n", |
2064 | user_alpha2[0], user_alpha2[1]); | |
09d989d1 LR |
2065 | alpha2[0] = user_alpha2[0]; |
2066 | alpha2[1] = user_alpha2[1]; | |
2067 | } | |
2068 | } else if (!is_world_regdom(ieee80211_regdom)) { | |
1a919318 JB |
2069 | REG_DBG_PRINT("Keeping preference on module parameter ieee80211_regdom: %c%c\n", |
2070 | ieee80211_regdom[0], ieee80211_regdom[1]); | |
09d989d1 LR |
2071 | alpha2[0] = ieee80211_regdom[0]; |
2072 | alpha2[1] = ieee80211_regdom[1]; | |
2073 | } else | |
d91e41b6 | 2074 | REG_DBG_PRINT("Restoring regulatory settings\n"); |
09d989d1 LR |
2075 | } |
2076 | ||
5ce543d1 RM |
2077 | static void restore_custom_reg_settings(struct wiphy *wiphy) |
2078 | { | |
2079 | struct ieee80211_supported_band *sband; | |
2080 | enum ieee80211_band band; | |
2081 | struct ieee80211_channel *chan; | |
2082 | int i; | |
2083 | ||
2084 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) { | |
2085 | sband = wiphy->bands[band]; | |
2086 | if (!sband) | |
2087 | continue; | |
2088 | for (i = 0; i < sband->n_channels; i++) { | |
2089 | chan = &sband->channels[i]; | |
2090 | chan->flags = chan->orig_flags; | |
2091 | chan->max_antenna_gain = chan->orig_mag; | |
2092 | chan->max_power = chan->orig_mpwr; | |
899852af | 2093 | chan->beacon_found = false; |
5ce543d1 RM |
2094 | } |
2095 | } | |
2096 | } | |
2097 | ||
09d989d1 LR |
2098 | /* |
2099 | * Restoring regulatory settings involves ingoring any | |
2100 | * possibly stale country IE information and user regulatory | |
2101 | * settings if so desired, this includes any beacon hints | |
2102 | * learned as we could have traveled outside to another country | |
2103 | * after disconnection. To restore regulatory settings we do | |
2104 | * exactly what we did at bootup: | |
2105 | * | |
2106 | * - send a core regulatory hint | |
2107 | * - send a user regulatory hint if applicable | |
2108 | * | |
2109 | * Device drivers that send a regulatory hint for a specific country | |
2110 | * keep their own regulatory domain on wiphy->regd so that does does | |
2111 | * not need to be remembered. | |
2112 | */ | |
2113 | static void restore_regulatory_settings(bool reset_user) | |
2114 | { | |
2115 | char alpha2[2]; | |
cee0bec5 | 2116 | char world_alpha2[2]; |
09d989d1 | 2117 | struct reg_beacon *reg_beacon, *btmp; |
14609555 LR |
2118 | struct regulatory_request *reg_request, *tmp; |
2119 | LIST_HEAD(tmp_reg_req_list); | |
5ce543d1 | 2120 | struct cfg80211_registered_device *rdev; |
09d989d1 | 2121 | |
5fe231e8 JB |
2122 | ASSERT_RTNL(); |
2123 | ||
2d319867 | 2124 | reset_regdomains(true, &world_regdom); |
09d989d1 LR |
2125 | restore_alpha2(alpha2, reset_user); |
2126 | ||
14609555 LR |
2127 | /* |
2128 | * If there's any pending requests we simply | |
2129 | * stash them to a temporary pending queue and | |
2130 | * add then after we've restored regulatory | |
2131 | * settings. | |
2132 | */ | |
2133 | spin_lock(®_requests_lock); | |
fea9bced JB |
2134 | list_for_each_entry_safe(reg_request, tmp, ®_requests_list, list) { |
2135 | if (reg_request->initiator != NL80211_REGDOM_SET_BY_USER) | |
2136 | continue; | |
2137 | list_move_tail(®_request->list, &tmp_reg_req_list); | |
14609555 LR |
2138 | } |
2139 | spin_unlock(®_requests_lock); | |
2140 | ||
09d989d1 LR |
2141 | /* Clear beacon hints */ |
2142 | spin_lock_bh(®_pending_beacons_lock); | |
fea9bced JB |
2143 | list_for_each_entry_safe(reg_beacon, btmp, ®_pending_beacons, list) { |
2144 | list_del(®_beacon->list); | |
2145 | kfree(reg_beacon); | |
09d989d1 LR |
2146 | } |
2147 | spin_unlock_bh(®_pending_beacons_lock); | |
2148 | ||
fea9bced JB |
2149 | list_for_each_entry_safe(reg_beacon, btmp, ®_beacon_list, list) { |
2150 | list_del(®_beacon->list); | |
2151 | kfree(reg_beacon); | |
09d989d1 LR |
2152 | } |
2153 | ||
2154 | /* First restore to the basic regulatory settings */ | |
379b82f4 JB |
2155 | world_alpha2[0] = cfg80211_world_regdom->alpha2[0]; |
2156 | world_alpha2[1] = cfg80211_world_regdom->alpha2[1]; | |
09d989d1 | 2157 | |
5ce543d1 | 2158 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) { |
a2f73b6c | 2159 | if (rdev->wiphy.regulatory_flags & REGULATORY_CUSTOM_REG) |
5ce543d1 RM |
2160 | restore_custom_reg_settings(&rdev->wiphy); |
2161 | } | |
2162 | ||
cee0bec5 | 2163 | regulatory_hint_core(world_alpha2); |
09d989d1 LR |
2164 | |
2165 | /* | |
2166 | * This restores the ieee80211_regdom module parameter | |
2167 | * preference or the last user requested regulatory | |
2168 | * settings, user regulatory settings takes precedence. | |
2169 | */ | |
2170 | if (is_an_alpha2(alpha2)) | |
57b5ce07 | 2171 | regulatory_hint_user(user_alpha2, NL80211_USER_REG_HINT_USER); |
09d989d1 | 2172 | |
14609555 | 2173 | spin_lock(®_requests_lock); |
11cff96c | 2174 | list_splice_tail_init(&tmp_reg_req_list, ®_requests_list); |
14609555 LR |
2175 | spin_unlock(®_requests_lock); |
2176 | ||
14609555 LR |
2177 | REG_DBG_PRINT("Kicking the queue\n"); |
2178 | ||
2179 | schedule_work(®_work); | |
2180 | } | |
09d989d1 LR |
2181 | |
2182 | void regulatory_hint_disconnect(void) | |
2183 | { | |
1a919318 | 2184 | REG_DBG_PRINT("All devices are disconnected, going to restore regulatory settings\n"); |
09d989d1 LR |
2185 | restore_regulatory_settings(false); |
2186 | } | |
2187 | ||
e38f8a7a LR |
2188 | static bool freq_is_chan_12_13_14(u16 freq) |
2189 | { | |
59eb21a6 BR |
2190 | if (freq == ieee80211_channel_to_frequency(12, IEEE80211_BAND_2GHZ) || |
2191 | freq == ieee80211_channel_to_frequency(13, IEEE80211_BAND_2GHZ) || | |
2192 | freq == ieee80211_channel_to_frequency(14, IEEE80211_BAND_2GHZ)) | |
e38f8a7a LR |
2193 | return true; |
2194 | return false; | |
2195 | } | |
2196 | ||
3ebfa6e7 LR |
2197 | static bool pending_reg_beacon(struct ieee80211_channel *beacon_chan) |
2198 | { | |
2199 | struct reg_beacon *pending_beacon; | |
2200 | ||
2201 | list_for_each_entry(pending_beacon, ®_pending_beacons, list) | |
2202 | if (beacon_chan->center_freq == | |
2203 | pending_beacon->chan.center_freq) | |
2204 | return true; | |
2205 | return false; | |
2206 | } | |
2207 | ||
e38f8a7a LR |
2208 | int regulatory_hint_found_beacon(struct wiphy *wiphy, |
2209 | struct ieee80211_channel *beacon_chan, | |
2210 | gfp_t gfp) | |
2211 | { | |
2212 | struct reg_beacon *reg_beacon; | |
3ebfa6e7 | 2213 | bool processing; |
e38f8a7a | 2214 | |
1a919318 JB |
2215 | if (beacon_chan->beacon_found || |
2216 | beacon_chan->flags & IEEE80211_CHAN_RADAR || | |
e38f8a7a | 2217 | (beacon_chan->band == IEEE80211_BAND_2GHZ && |
1a919318 | 2218 | !freq_is_chan_12_13_14(beacon_chan->center_freq))) |
e38f8a7a LR |
2219 | return 0; |
2220 | ||
3ebfa6e7 LR |
2221 | spin_lock_bh(®_pending_beacons_lock); |
2222 | processing = pending_reg_beacon(beacon_chan); | |
2223 | spin_unlock_bh(®_pending_beacons_lock); | |
2224 | ||
2225 | if (processing) | |
e38f8a7a LR |
2226 | return 0; |
2227 | ||
2228 | reg_beacon = kzalloc(sizeof(struct reg_beacon), gfp); | |
2229 | if (!reg_beacon) | |
2230 | return -ENOMEM; | |
2231 | ||
1a919318 | 2232 | REG_DBG_PRINT("Found new beacon on frequency: %d MHz (Ch %d) on %s\n", |
4113f751 LR |
2233 | beacon_chan->center_freq, |
2234 | ieee80211_frequency_to_channel(beacon_chan->center_freq), | |
2235 | wiphy_name(wiphy)); | |
2236 | ||
e38f8a7a | 2237 | memcpy(®_beacon->chan, beacon_chan, |
1a919318 | 2238 | sizeof(struct ieee80211_channel)); |
e38f8a7a LR |
2239 | |
2240 | /* | |
2241 | * Since we can be called from BH or and non-BH context | |
2242 | * we must use spin_lock_bh() | |
2243 | */ | |
2244 | spin_lock_bh(®_pending_beacons_lock); | |
2245 | list_add_tail(®_beacon->list, ®_pending_beacons); | |
2246 | spin_unlock_bh(®_pending_beacons_lock); | |
2247 | ||
2248 | schedule_work(®_work); | |
2249 | ||
2250 | return 0; | |
2251 | } | |
2252 | ||
a3d2eaf0 | 2253 | static void print_rd_rules(const struct ieee80211_regdomain *rd) |
b2e1b302 LR |
2254 | { |
2255 | unsigned int i; | |
a3d2eaf0 JB |
2256 | const struct ieee80211_reg_rule *reg_rule = NULL; |
2257 | const struct ieee80211_freq_range *freq_range = NULL; | |
2258 | const struct ieee80211_power_rule *power_rule = NULL; | |
97524820 | 2259 | char bw[32]; |
b2e1b302 | 2260 | |
6653325a | 2261 | pr_info(" (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)\n"); |
b2e1b302 LR |
2262 | |
2263 | for (i = 0; i < rd->n_reg_rules; i++) { | |
2264 | reg_rule = &rd->reg_rules[i]; | |
2265 | freq_range = ®_rule->freq_range; | |
2266 | power_rule = ®_rule->power_rule; | |
2267 | ||
b0dfd2ea JD |
2268 | if (reg_rule->flags & NL80211_RRF_AUTO_BW) |
2269 | snprintf(bw, sizeof(bw), "%d KHz, %d KHz AUTO", | |
2270 | freq_range->max_bandwidth_khz, | |
97524820 JD |
2271 | reg_get_max_bandwidth(rd, reg_rule)); |
2272 | else | |
b0dfd2ea | 2273 | snprintf(bw, sizeof(bw), "%d KHz", |
97524820 JD |
2274 | freq_range->max_bandwidth_khz); |
2275 | ||
fb1fc7ad LR |
2276 | /* |
2277 | * There may not be documentation for max antenna gain | |
2278 | * in certain regions | |
2279 | */ | |
b2e1b302 | 2280 | if (power_rule->max_antenna_gain) |
97524820 | 2281 | pr_info(" (%d KHz - %d KHz @ %s), (%d mBi, %d mBm)\n", |
b2e1b302 LR |
2282 | freq_range->start_freq_khz, |
2283 | freq_range->end_freq_khz, | |
97524820 | 2284 | bw, |
b2e1b302 LR |
2285 | power_rule->max_antenna_gain, |
2286 | power_rule->max_eirp); | |
2287 | else | |
97524820 | 2288 | pr_info(" (%d KHz - %d KHz @ %s), (N/A, %d mBm)\n", |
b2e1b302 LR |
2289 | freq_range->start_freq_khz, |
2290 | freq_range->end_freq_khz, | |
97524820 | 2291 | bw, |
b2e1b302 LR |
2292 | power_rule->max_eirp); |
2293 | } | |
2294 | } | |
2295 | ||
4c7d3982 | 2296 | bool reg_supported_dfs_region(enum nl80211_dfs_regions dfs_region) |
8b60b078 LR |
2297 | { |
2298 | switch (dfs_region) { | |
2299 | case NL80211_DFS_UNSET: | |
2300 | case NL80211_DFS_FCC: | |
2301 | case NL80211_DFS_ETSI: | |
2302 | case NL80211_DFS_JP: | |
2303 | return true; | |
2304 | default: | |
2305 | REG_DBG_PRINT("Ignoring uknown DFS master region: %d\n", | |
2306 | dfs_region); | |
2307 | return false; | |
2308 | } | |
2309 | } | |
2310 | ||
a3d2eaf0 | 2311 | static void print_regdomain(const struct ieee80211_regdomain *rd) |
b2e1b302 | 2312 | { |
c492db37 | 2313 | struct regulatory_request *lr = get_last_request(); |
b2e1b302 | 2314 | |
3f2355cb | 2315 | if (is_intersected_alpha2(rd->alpha2)) { |
c492db37 | 2316 | if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) { |
79c97e97 | 2317 | struct cfg80211_registered_device *rdev; |
c492db37 | 2318 | rdev = cfg80211_rdev_by_wiphy_idx(lr->wiphy_idx); |
79c97e97 | 2319 | if (rdev) { |
e9c0268f | 2320 | pr_info("Current regulatory domain updated by AP to: %c%c\n", |
79c97e97 JB |
2321 | rdev->country_ie_alpha2[0], |
2322 | rdev->country_ie_alpha2[1]); | |
3f2355cb | 2323 | } else |
e9c0268f | 2324 | pr_info("Current regulatory domain intersected:\n"); |
3f2355cb | 2325 | } else |
e9c0268f | 2326 | pr_info("Current regulatory domain intersected:\n"); |
1a919318 | 2327 | } else if (is_world_regdom(rd->alpha2)) { |
e9c0268f | 2328 | pr_info("World regulatory domain updated:\n"); |
1a919318 | 2329 | } else { |
b2e1b302 | 2330 | if (is_unknown_alpha2(rd->alpha2)) |
e9c0268f | 2331 | pr_info("Regulatory domain changed to driver built-in settings (unknown country)\n"); |
57b5ce07 | 2332 | else { |
c492db37 | 2333 | if (reg_request_cell_base(lr)) |
1a919318 | 2334 | pr_info("Regulatory domain changed to country: %c%c by Cell Station\n", |
57b5ce07 LR |
2335 | rd->alpha2[0], rd->alpha2[1]); |
2336 | else | |
1a919318 | 2337 | pr_info("Regulatory domain changed to country: %c%c\n", |
57b5ce07 LR |
2338 | rd->alpha2[0], rd->alpha2[1]); |
2339 | } | |
b2e1b302 | 2340 | } |
1a919318 | 2341 | |
3ef121b5 | 2342 | pr_info(" DFS Master region: %s", reg_dfs_region_str(rd->dfs_region)); |
b2e1b302 LR |
2343 | print_rd_rules(rd); |
2344 | } | |
2345 | ||
2df78167 | 2346 | static void print_regdomain_info(const struct ieee80211_regdomain *rd) |
b2e1b302 | 2347 | { |
e9c0268f | 2348 | pr_info("Regulatory domain: %c%c\n", rd->alpha2[0], rd->alpha2[1]); |
b2e1b302 LR |
2349 | print_rd_rules(rd); |
2350 | } | |
2351 | ||
3b9e5aca LR |
2352 | static int reg_set_rd_core(const struct ieee80211_regdomain *rd) |
2353 | { | |
2354 | if (!is_world_regdom(rd->alpha2)) | |
2355 | return -EINVAL; | |
2356 | update_world_regdomain(rd); | |
2357 | return 0; | |
2358 | } | |
2359 | ||
84721d44 LR |
2360 | static int reg_set_rd_user(const struct ieee80211_regdomain *rd, |
2361 | struct regulatory_request *user_request) | |
2362 | { | |
2363 | const struct ieee80211_regdomain *intersected_rd = NULL; | |
2364 | ||
84721d44 LR |
2365 | if (!regdom_changes(rd->alpha2)) |
2366 | return -EALREADY; | |
2367 | ||
2368 | if (!is_valid_rd(rd)) { | |
2369 | pr_err("Invalid regulatory domain detected:\n"); | |
2370 | print_regdomain_info(rd); | |
2371 | return -EINVAL; | |
2372 | } | |
2373 | ||
2374 | if (!user_request->intersect) { | |
2375 | reset_regdomains(false, rd); | |
2376 | return 0; | |
2377 | } | |
2378 | ||
2379 | intersected_rd = regdom_intersect(rd, get_cfg80211_regdom()); | |
2380 | if (!intersected_rd) | |
2381 | return -EINVAL; | |
2382 | ||
2383 | kfree(rd); | |
2384 | rd = NULL; | |
2385 | reset_regdomains(false, intersected_rd); | |
2386 | ||
2387 | return 0; | |
2388 | } | |
2389 | ||
f5fe3247 LR |
2390 | static int reg_set_rd_driver(const struct ieee80211_regdomain *rd, |
2391 | struct regulatory_request *driver_request) | |
b2e1b302 | 2392 | { |
e9763c3c | 2393 | const struct ieee80211_regdomain *regd; |
9c96477d | 2394 | const struct ieee80211_regdomain *intersected_rd = NULL; |
f5fe3247 | 2395 | const struct ieee80211_regdomain *tmp; |
806a9e39 | 2396 | struct wiphy *request_wiphy; |
6913b49a | 2397 | |
f5fe3247 | 2398 | if (is_world_regdom(rd->alpha2)) |
b2e1b302 LR |
2399 | return -EINVAL; |
2400 | ||
f5fe3247 LR |
2401 | if (!regdom_changes(rd->alpha2)) |
2402 | return -EALREADY; | |
b2e1b302 | 2403 | |
8375af3b | 2404 | if (!is_valid_rd(rd)) { |
e9c0268f | 2405 | pr_err("Invalid regulatory domain detected:\n"); |
8375af3b LR |
2406 | print_regdomain_info(rd); |
2407 | return -EINVAL; | |
b2e1b302 LR |
2408 | } |
2409 | ||
f5fe3247 LR |
2410 | request_wiphy = wiphy_idx_to_wiphy(driver_request->wiphy_idx); |
2411 | if (!request_wiphy) { | |
845f3351 SD |
2412 | queue_delayed_work(system_power_efficient_wq, |
2413 | ®_timeout, 0); | |
de3584bd JB |
2414 | return -ENODEV; |
2415 | } | |
806a9e39 | 2416 | |
f5fe3247 | 2417 | if (!driver_request->intersect) { |
558f6d32 LR |
2418 | if (request_wiphy->regd) |
2419 | return -EALREADY; | |
3e0c3ff3 | 2420 | |
e9763c3c JB |
2421 | regd = reg_copy_regd(rd); |
2422 | if (IS_ERR(regd)) | |
2423 | return PTR_ERR(regd); | |
3e0c3ff3 | 2424 | |
458f4f9e | 2425 | rcu_assign_pointer(request_wiphy->regd, regd); |
379b82f4 | 2426 | reset_regdomains(false, rd); |
b8295acd LR |
2427 | return 0; |
2428 | } | |
2429 | ||
f5fe3247 LR |
2430 | intersected_rd = regdom_intersect(rd, get_cfg80211_regdom()); |
2431 | if (!intersected_rd) | |
2432 | return -EINVAL; | |
b8295acd | 2433 | |
f5fe3247 LR |
2434 | /* |
2435 | * We can trash what CRDA provided now. | |
2436 | * However if a driver requested this specific regulatory | |
2437 | * domain we keep it for its private use | |
2438 | */ | |
2439 | tmp = get_wiphy_regdom(request_wiphy); | |
2440 | rcu_assign_pointer(request_wiphy->regd, rd); | |
2441 | rcu_free_regdom(tmp); | |
b8295acd | 2442 | |
f5fe3247 | 2443 | rd = NULL; |
b7566fc3 | 2444 | |
f5fe3247 | 2445 | reset_regdomains(false, intersected_rd); |
3e0c3ff3 | 2446 | |
f5fe3247 LR |
2447 | return 0; |
2448 | } | |
2449 | ||
01992406 LR |
2450 | static int reg_set_rd_country_ie(const struct ieee80211_regdomain *rd, |
2451 | struct regulatory_request *country_ie_request) | |
f5fe3247 LR |
2452 | { |
2453 | struct wiphy *request_wiphy; | |
b8295acd | 2454 | |
f5fe3247 LR |
2455 | if (!is_alpha2_set(rd->alpha2) && !is_an_alpha2(rd->alpha2) && |
2456 | !is_unknown_alpha2(rd->alpha2)) | |
2457 | return -EINVAL; | |
b8295acd | 2458 | |
f5fe3247 LR |
2459 | /* |
2460 | * Lets only bother proceeding on the same alpha2 if the current | |
2461 | * rd is non static (it means CRDA was present and was used last) | |
2462 | * and the pending request came in from a country IE | |
2463 | */ | |
2464 | ||
2465 | if (!is_valid_rd(rd)) { | |
2466 | pr_err("Invalid regulatory domain detected:\n"); | |
2467 | print_regdomain_info(rd); | |
2468 | return -EINVAL; | |
9c96477d LR |
2469 | } |
2470 | ||
01992406 | 2471 | request_wiphy = wiphy_idx_to_wiphy(country_ie_request->wiphy_idx); |
f5fe3247 | 2472 | if (!request_wiphy) { |
845f3351 SD |
2473 | queue_delayed_work(system_power_efficient_wq, |
2474 | ®_timeout, 0); | |
f5fe3247 LR |
2475 | return -ENODEV; |
2476 | } | |
b2e1b302 | 2477 | |
01992406 | 2478 | if (country_ie_request->intersect) |
f5fe3247 LR |
2479 | return -EINVAL; |
2480 | ||
2481 | reset_regdomains(false, rd); | |
2482 | return 0; | |
2483 | } | |
b2e1b302 | 2484 | |
fb1fc7ad LR |
2485 | /* |
2486 | * Use this call to set the current regulatory domain. Conflicts with | |
b2e1b302 | 2487 | * multiple drivers can be ironed out later. Caller must've already |
458f4f9e | 2488 | * kmalloc'd the rd structure. |
fb1fc7ad | 2489 | */ |
a3d2eaf0 | 2490 | int set_regdom(const struct ieee80211_regdomain *rd) |
b2e1b302 | 2491 | { |
c492db37 | 2492 | struct regulatory_request *lr; |
b2e1b302 LR |
2493 | int r; |
2494 | ||
3b9e5aca LR |
2495 | if (!reg_is_valid_request(rd->alpha2)) { |
2496 | kfree(rd); | |
2497 | return -EINVAL; | |
2498 | } | |
2499 | ||
c492db37 | 2500 | lr = get_last_request(); |
abc7381b | 2501 | |
b2e1b302 | 2502 | /* Note that this doesn't update the wiphys, this is done below */ |
3b9e5aca LR |
2503 | switch (lr->initiator) { |
2504 | case NL80211_REGDOM_SET_BY_CORE: | |
2505 | r = reg_set_rd_core(rd); | |
2506 | break; | |
2507 | case NL80211_REGDOM_SET_BY_USER: | |
84721d44 LR |
2508 | r = reg_set_rd_user(rd, lr); |
2509 | break; | |
3b9e5aca | 2510 | case NL80211_REGDOM_SET_BY_DRIVER: |
f5fe3247 LR |
2511 | r = reg_set_rd_driver(rd, lr); |
2512 | break; | |
3b9e5aca | 2513 | case NL80211_REGDOM_SET_BY_COUNTRY_IE: |
01992406 | 2514 | r = reg_set_rd_country_ie(rd, lr); |
3b9e5aca LR |
2515 | break; |
2516 | default: | |
2517 | WARN(1, "invalid initiator %d\n", lr->initiator); | |
2518 | return -EINVAL; | |
2519 | } | |
2520 | ||
d2372b31 | 2521 | if (r) { |
95908535 KV |
2522 | if (r == -EALREADY) |
2523 | reg_set_request_processed(); | |
2524 | ||
d2372b31 | 2525 | kfree(rd); |
38fd2143 | 2526 | return r; |
d2372b31 | 2527 | } |
b2e1b302 | 2528 | |
b2e1b302 | 2529 | /* This would make this whole thing pointless */ |
38fd2143 JB |
2530 | if (WARN_ON(!lr->intersect && rd != get_cfg80211_regdom())) |
2531 | return -EINVAL; | |
b2e1b302 LR |
2532 | |
2533 | /* update all wiphys now with the new established regulatory domain */ | |
c492db37 | 2534 | update_all_wiphy_regulatory(lr->initiator); |
b2e1b302 | 2535 | |
458f4f9e | 2536 | print_regdomain(get_cfg80211_regdom()); |
b2e1b302 | 2537 | |
c492db37 | 2538 | nl80211_send_reg_change_event(lr); |
73d54c9e | 2539 | |
b2e253cf LR |
2540 | reg_set_request_processed(); |
2541 | ||
38fd2143 | 2542 | return 0; |
b2e1b302 LR |
2543 | } |
2544 | ||
57b5ce07 LR |
2545 | void wiphy_regulatory_register(struct wiphy *wiphy) |
2546 | { | |
23df0b73 AN |
2547 | struct regulatory_request *lr; |
2548 | ||
57b5ce07 LR |
2549 | if (!reg_dev_ignore_cell_hint(wiphy)) |
2550 | reg_num_devs_support_basehint++; | |
2551 | ||
23df0b73 AN |
2552 | lr = get_last_request(); |
2553 | wiphy_update_regulatory(wiphy, lr->initiator); | |
57b5ce07 LR |
2554 | } |
2555 | ||
bfead080 | 2556 | void wiphy_regulatory_deregister(struct wiphy *wiphy) |
3f2355cb | 2557 | { |
0ad8acaf | 2558 | struct wiphy *request_wiphy = NULL; |
c492db37 | 2559 | struct regulatory_request *lr; |
761cf7ec | 2560 | |
c492db37 | 2561 | lr = get_last_request(); |
abc7381b | 2562 | |
57b5ce07 LR |
2563 | if (!reg_dev_ignore_cell_hint(wiphy)) |
2564 | reg_num_devs_support_basehint--; | |
2565 | ||
458f4f9e JB |
2566 | rcu_free_regdom(get_wiphy_regdom(wiphy)); |
2567 | rcu_assign_pointer(wiphy->regd, NULL); | |
0ef9ccdd | 2568 | |
c492db37 JB |
2569 | if (lr) |
2570 | request_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx); | |
806a9e39 | 2571 | |
0ef9ccdd | 2572 | if (!request_wiphy || request_wiphy != wiphy) |
38fd2143 | 2573 | return; |
0ef9ccdd | 2574 | |
c492db37 JB |
2575 | lr->wiphy_idx = WIPHY_IDX_INVALID; |
2576 | lr->country_ie_env = ENVIRON_ANY; | |
3f2355cb LR |
2577 | } |
2578 | ||
a90c7a31 LR |
2579 | static void reg_timeout_work(struct work_struct *work) |
2580 | { | |
1a919318 | 2581 | REG_DBG_PRINT("Timeout while waiting for CRDA to reply, restoring regulatory settings\n"); |
f77b86d7 | 2582 | rtnl_lock(); |
a90c7a31 | 2583 | restore_regulatory_settings(true); |
f77b86d7 | 2584 | rtnl_unlock(); |
a90c7a31 LR |
2585 | } |
2586 | ||
2fcc9f73 | 2587 | int __init regulatory_init(void) |
b2e1b302 | 2588 | { |
bcf4f99b | 2589 | int err = 0; |
734366de | 2590 | |
b2e1b302 LR |
2591 | reg_pdev = platform_device_register_simple("regulatory", 0, NULL, 0); |
2592 | if (IS_ERR(reg_pdev)) | |
2593 | return PTR_ERR(reg_pdev); | |
734366de | 2594 | |
fe33eb39 | 2595 | spin_lock_init(®_requests_lock); |
e38f8a7a | 2596 | spin_lock_init(®_pending_beacons_lock); |
fe33eb39 | 2597 | |
80007efe LR |
2598 | reg_regdb_size_check(); |
2599 | ||
458f4f9e | 2600 | rcu_assign_pointer(cfg80211_regdomain, cfg80211_world_regdom); |
734366de | 2601 | |
09d989d1 LR |
2602 | user_alpha2[0] = '9'; |
2603 | user_alpha2[1] = '7'; | |
2604 | ||
ae9e4b0d | 2605 | /* We always try to get an update for the static regdomain */ |
458f4f9e | 2606 | err = regulatory_hint_core(cfg80211_world_regdom->alpha2); |
ba25c141 | 2607 | if (err) { |
bcf4f99b LR |
2608 | if (err == -ENOMEM) |
2609 | return err; | |
2610 | /* | |
2611 | * N.B. kobject_uevent_env() can fail mainly for when we're out | |
2612 | * memory which is handled and propagated appropriately above | |
2613 | * but it can also fail during a netlink_broadcast() or during | |
2614 | * early boot for call_usermodehelper(). For now treat these | |
2615 | * errors as non-fatal. | |
2616 | */ | |
e9c0268f | 2617 | pr_err("kobject_uevent_env() was unable to call CRDA during init\n"); |
bcf4f99b | 2618 | } |
734366de | 2619 | |
ae9e4b0d LR |
2620 | /* |
2621 | * Finally, if the user set the module parameter treat it | |
2622 | * as a user hint. | |
2623 | */ | |
2624 | if (!is_world_regdom(ieee80211_regdom)) | |
57b5ce07 LR |
2625 | regulatory_hint_user(ieee80211_regdom, |
2626 | NL80211_USER_REG_HINT_USER); | |
ae9e4b0d | 2627 | |
b2e1b302 LR |
2628 | return 0; |
2629 | } | |
2630 | ||
1a919318 | 2631 | void regulatory_exit(void) |
b2e1b302 | 2632 | { |
fe33eb39 | 2633 | struct regulatory_request *reg_request, *tmp; |
e38f8a7a | 2634 | struct reg_beacon *reg_beacon, *btmp; |
fe33eb39 LR |
2635 | |
2636 | cancel_work_sync(®_work); | |
a90c7a31 | 2637 | cancel_delayed_work_sync(®_timeout); |
fe33eb39 | 2638 | |
9027b149 | 2639 | /* Lock to suppress warnings */ |
38fd2143 | 2640 | rtnl_lock(); |
379b82f4 | 2641 | reset_regdomains(true, NULL); |
38fd2143 | 2642 | rtnl_unlock(); |
734366de | 2643 | |
58ebacc6 | 2644 | dev_set_uevent_suppress(®_pdev->dev, true); |
f6037d09 | 2645 | |
b2e1b302 | 2646 | platform_device_unregister(reg_pdev); |
734366de | 2647 | |
fea9bced JB |
2648 | list_for_each_entry_safe(reg_beacon, btmp, ®_pending_beacons, list) { |
2649 | list_del(®_beacon->list); | |
2650 | kfree(reg_beacon); | |
e38f8a7a | 2651 | } |
e38f8a7a | 2652 | |
fea9bced JB |
2653 | list_for_each_entry_safe(reg_beacon, btmp, ®_beacon_list, list) { |
2654 | list_del(®_beacon->list); | |
2655 | kfree(reg_beacon); | |
e38f8a7a LR |
2656 | } |
2657 | ||
fea9bced JB |
2658 | list_for_each_entry_safe(reg_request, tmp, ®_requests_list, list) { |
2659 | list_del(®_request->list); | |
2660 | kfree(reg_request); | |
fe33eb39 | 2661 | } |
8318d78a | 2662 | } |