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> |
2740f0cf | 6 | * Copyright 2013-2014 Intel Mobile Communications GmbH |
8318d78a | 7 | * |
3b77d5ec LR |
8 | * Permission to use, copy, modify, and/or distribute this software for any |
9 | * purpose with or without fee is hereby granted, provided that the above | |
10 | * copyright notice and this permission notice appear in all copies. | |
11 | * | |
12 | * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES | |
13 | * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF | |
14 | * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR | |
15 | * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES | |
16 | * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN | |
17 | * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF | |
18 | * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. | |
8318d78a JB |
19 | */ |
20 | ||
3b77d5ec | 21 | |
b2e1b302 LR |
22 | /** |
23 | * DOC: Wireless regulatory infrastructure | |
8318d78a JB |
24 | * |
25 | * The usual implementation is for a driver to read a device EEPROM to | |
26 | * determine which regulatory domain it should be operating under, then | |
27 | * looking up the allowable channels in a driver-local table and finally | |
28 | * registering those channels in the wiphy structure. | |
29 | * | |
b2e1b302 LR |
30 | * Another set of compliance enforcement is for drivers to use their |
31 | * own compliance limits which can be stored on the EEPROM. The host | |
32 | * driver or firmware may ensure these are used. | |
33 | * | |
34 | * In addition to all this we provide an extra layer of regulatory | |
35 | * conformance. For drivers which do not have any regulatory | |
36 | * information CRDA provides the complete regulatory solution. | |
37 | * For others it provides a community effort on further restrictions | |
38 | * to enhance compliance. | |
39 | * | |
40 | * Note: When number of rules --> infinity we will not be able to | |
41 | * index on alpha2 any more, instead we'll probably have to | |
42 | * rely on some SHA1 checksum of the regdomain for example. | |
43 | * | |
8318d78a | 44 | */ |
e9c0268f JP |
45 | |
46 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt | |
47 | ||
8318d78a | 48 | #include <linux/kernel.h> |
bc3b2d7f | 49 | #include <linux/export.h> |
5a0e3ad6 | 50 | #include <linux/slab.h> |
b2e1b302 | 51 | #include <linux/list.h> |
c61029c7 | 52 | #include <linux/ctype.h> |
b2e1b302 LR |
53 | #include <linux/nl80211.h> |
54 | #include <linux/platform_device.h> | |
d9b93842 | 55 | #include <linux/moduleparam.h> |
b2e1b302 | 56 | #include <net/cfg80211.h> |
8318d78a | 57 | #include "core.h" |
b2e1b302 | 58 | #include "reg.h" |
3b377ea9 | 59 | #include "regdb.h" |
73d54c9e | 60 | #include "nl80211.h" |
8318d78a | 61 | |
4113f751 | 62 | #ifdef CONFIG_CFG80211_REG_DEBUG |
12c5ffb5 JP |
63 | #define REG_DBG_PRINT(format, args...) \ |
64 | printk(KERN_DEBUG pr_fmt(format), ##args) | |
4113f751 | 65 | #else |
8271195e | 66 | #define REG_DBG_PRINT(args...) |
4113f751 LR |
67 | #endif |
68 | ||
52616f2b IP |
69 | /** |
70 | * enum reg_request_treatment - regulatory request treatment | |
71 | * | |
72 | * @REG_REQ_OK: continue processing the regulatory request | |
73 | * @REG_REQ_IGNORE: ignore the regulatory request | |
74 | * @REG_REQ_INTERSECT: the regulatory domain resulting from this request should | |
75 | * be intersected with the current one. | |
76 | * @REG_REQ_ALREADY_SET: the regulatory request will not change the current | |
77 | * regulatory settings, and no further processing is required. | |
78 | * @REG_REQ_USER_HINT_HANDLED: a non alpha2 user hint was handled and no | |
79 | * further processing is required, i.e., not need to update last_request | |
80 | * etc. This should be used for user hints that do not provide an alpha2 | |
81 | * but some other type of regulatory hint, i.e., indoor operation. | |
82 | */ | |
2f92212b JB |
83 | enum reg_request_treatment { |
84 | REG_REQ_OK, | |
85 | REG_REQ_IGNORE, | |
86 | REG_REQ_INTERSECT, | |
87 | REG_REQ_ALREADY_SET, | |
52616f2b | 88 | REG_REQ_USER_HINT_HANDLED, |
2f92212b JB |
89 | }; |
90 | ||
a042994d LR |
91 | static struct regulatory_request core_request_world = { |
92 | .initiator = NL80211_REGDOM_SET_BY_CORE, | |
93 | .alpha2[0] = '0', | |
94 | .alpha2[1] = '0', | |
95 | .intersect = false, | |
96 | .processed = true, | |
97 | .country_ie_env = ENVIRON_ANY, | |
98 | }; | |
99 | ||
38fd2143 JB |
100 | /* |
101 | * Receipt of information from last regulatory request, | |
102 | * protected by RTNL (and can be accessed with RCU protection) | |
103 | */ | |
c492db37 JB |
104 | static struct regulatory_request __rcu *last_request = |
105 | (void __rcu *)&core_request_world; | |
734366de | 106 | |
b2e1b302 LR |
107 | /* To trigger userspace events */ |
108 | static struct platform_device *reg_pdev; | |
8318d78a | 109 | |
fb1fc7ad LR |
110 | /* |
111 | * Central wireless core regulatory domains, we only need two, | |
734366de | 112 | * the current one and a world regulatory domain in case we have no |
e8da2bb4 | 113 | * information to give us an alpha2. |
38fd2143 | 114 | * (protected by RTNL, can be read under RCU) |
fb1fc7ad | 115 | */ |
458f4f9e | 116 | const struct ieee80211_regdomain __rcu *cfg80211_regdomain; |
734366de | 117 | |
57b5ce07 LR |
118 | /* |
119 | * Number of devices that registered to the core | |
120 | * that support cellular base station regulatory hints | |
38fd2143 | 121 | * (protected by RTNL) |
57b5ce07 LR |
122 | */ |
123 | static int reg_num_devs_support_basehint; | |
124 | ||
52616f2b IP |
125 | /* |
126 | * State variable indicating if the platform on which the devices | |
127 | * are attached is operating in an indoor environment. The state variable | |
128 | * is relevant for all registered devices. | |
129 | * (protected by RTNL) | |
130 | */ | |
131 | static bool reg_is_indoor; | |
132 | ||
458f4f9e JB |
133 | static const struct ieee80211_regdomain *get_cfg80211_regdom(void) |
134 | { | |
38fd2143 | 135 | return rtnl_dereference(cfg80211_regdomain); |
458f4f9e JB |
136 | } |
137 | ||
138 | static const struct ieee80211_regdomain *get_wiphy_regdom(struct wiphy *wiphy) | |
139 | { | |
38fd2143 | 140 | return rtnl_dereference(wiphy->regd); |
458f4f9e JB |
141 | } |
142 | ||
3ef121b5 LR |
143 | static const char *reg_dfs_region_str(enum nl80211_dfs_regions dfs_region) |
144 | { | |
145 | switch (dfs_region) { | |
146 | case NL80211_DFS_UNSET: | |
147 | return "unset"; | |
148 | case NL80211_DFS_FCC: | |
149 | return "FCC"; | |
150 | case NL80211_DFS_ETSI: | |
151 | return "ETSI"; | |
152 | case NL80211_DFS_JP: | |
153 | return "JP"; | |
154 | } | |
155 | return "Unknown"; | |
156 | } | |
157 | ||
6c474799 LR |
158 | enum nl80211_dfs_regions reg_get_dfs_region(struct wiphy *wiphy) |
159 | { | |
160 | const struct ieee80211_regdomain *regd = NULL; | |
161 | const struct ieee80211_regdomain *wiphy_regd = NULL; | |
162 | ||
163 | regd = get_cfg80211_regdom(); | |
164 | if (!wiphy) | |
165 | goto out; | |
166 | ||
167 | wiphy_regd = get_wiphy_regdom(wiphy); | |
168 | if (!wiphy_regd) | |
169 | goto out; | |
170 | ||
171 | if (wiphy_regd->dfs_region == regd->dfs_region) | |
172 | goto out; | |
173 | ||
174 | REG_DBG_PRINT("%s: device specific dfs_region " | |
175 | "(%s) disagrees with cfg80211's " | |
176 | "central dfs_region (%s)\n", | |
177 | dev_name(&wiphy->dev), | |
178 | reg_dfs_region_str(wiphy_regd->dfs_region), | |
179 | reg_dfs_region_str(regd->dfs_region)); | |
180 | ||
181 | out: | |
182 | return regd->dfs_region; | |
183 | } | |
184 | ||
458f4f9e JB |
185 | static void rcu_free_regdom(const struct ieee80211_regdomain *r) |
186 | { | |
187 | if (!r) | |
188 | return; | |
189 | kfree_rcu((struct ieee80211_regdomain *)r, rcu_head); | |
190 | } | |
191 | ||
c492db37 JB |
192 | static struct regulatory_request *get_last_request(void) |
193 | { | |
38fd2143 | 194 | return rcu_dereference_rtnl(last_request); |
c492db37 JB |
195 | } |
196 | ||
e38f8a7a | 197 | /* Used to queue up regulatory hints */ |
fe33eb39 LR |
198 | static LIST_HEAD(reg_requests_list); |
199 | static spinlock_t reg_requests_lock; | |
200 | ||
e38f8a7a LR |
201 | /* Used to queue up beacon hints for review */ |
202 | static LIST_HEAD(reg_pending_beacons); | |
203 | static spinlock_t reg_pending_beacons_lock; | |
204 | ||
205 | /* Used to keep track of processed beacon hints */ | |
206 | static LIST_HEAD(reg_beacon_list); | |
207 | ||
208 | struct reg_beacon { | |
209 | struct list_head list; | |
210 | struct ieee80211_channel chan; | |
211 | }; | |
212 | ||
f333a7a2 LR |
213 | static void reg_todo(struct work_struct *work); |
214 | static DECLARE_WORK(reg_work, reg_todo); | |
215 | ||
a90c7a31 LR |
216 | static void reg_timeout_work(struct work_struct *work); |
217 | static DECLARE_DELAYED_WORK(reg_timeout, reg_timeout_work); | |
218 | ||
734366de JB |
219 | /* We keep a static world regulatory domain in case of the absence of CRDA */ |
220 | static const struct ieee80211_regdomain world_regdom = { | |
90cdc6df | 221 | .n_reg_rules = 6, |
734366de JB |
222 | .alpha2 = "00", |
223 | .reg_rules = { | |
68798a62 LR |
224 | /* IEEE 802.11b/g, channels 1..11 */ |
225 | REG_RULE(2412-10, 2462+10, 40, 6, 20, 0), | |
43c771a1 JB |
226 | /* IEEE 802.11b/g, channels 12..13. */ |
227 | REG_RULE(2467-10, 2472+10, 40, 6, 20, | |
8fe02e16 | 228 | NL80211_RRF_NO_IR), |
611b6a82 LR |
229 | /* IEEE 802.11 channel 14 - Only JP enables |
230 | * this and for 802.11b only */ | |
231 | REG_RULE(2484-10, 2484+10, 20, 6, 20, | |
8fe02e16 | 232 | NL80211_RRF_NO_IR | |
611b6a82 LR |
233 | NL80211_RRF_NO_OFDM), |
234 | /* IEEE 802.11a, channel 36..48 */ | |
131a19bc | 235 | REG_RULE(5180-10, 5240+10, 160, 6, 20, |
8fe02e16 | 236 | NL80211_RRF_NO_IR), |
3fc71f77 | 237 | |
131a19bc JB |
238 | /* IEEE 802.11a, channel 52..64 - DFS required */ |
239 | REG_RULE(5260-10, 5320+10, 160, 6, 20, | |
8fe02e16 | 240 | NL80211_RRF_NO_IR | |
131a19bc JB |
241 | NL80211_RRF_DFS), |
242 | ||
243 | /* IEEE 802.11a, channel 100..144 - DFS required */ | |
244 | REG_RULE(5500-10, 5720+10, 160, 6, 20, | |
8fe02e16 | 245 | NL80211_RRF_NO_IR | |
131a19bc | 246 | NL80211_RRF_DFS), |
3fc71f77 LR |
247 | |
248 | /* IEEE 802.11a, channel 149..165 */ | |
8ab9d85c | 249 | REG_RULE(5745-10, 5825+10, 80, 6, 20, |
8fe02e16 | 250 | NL80211_RRF_NO_IR), |
90cdc6df VK |
251 | |
252 | /* IEEE 802.11ad (60gHz), channels 1..3 */ | |
253 | REG_RULE(56160+2160*1-1080, 56160+2160*3+1080, 2160, 0, 0, 0), | |
734366de JB |
254 | } |
255 | }; | |
256 | ||
38fd2143 | 257 | /* protected by RTNL */ |
a3d2eaf0 JB |
258 | static const struct ieee80211_regdomain *cfg80211_world_regdom = |
259 | &world_regdom; | |
734366de | 260 | |
6ee7d330 | 261 | static char *ieee80211_regdom = "00"; |
09d989d1 | 262 | static char user_alpha2[2]; |
6ee7d330 | 263 | |
734366de JB |
264 | module_param(ieee80211_regdom, charp, 0444); |
265 | MODULE_PARM_DESC(ieee80211_regdom, "IEEE 802.11 regulatory domain code"); | |
266 | ||
c888393b | 267 | static void reg_free_request(struct regulatory_request *request) |
5ad6ef5e | 268 | { |
c888393b AN |
269 | if (request != get_last_request()) |
270 | kfree(request); | |
271 | } | |
272 | ||
273 | static void reg_free_last_request(void) | |
274 | { | |
275 | struct regulatory_request *lr = get_last_request(); | |
276 | ||
5ad6ef5e LR |
277 | if (lr != &core_request_world && lr) |
278 | kfree_rcu(lr, rcu_head); | |
279 | } | |
280 | ||
05f1a3ea LR |
281 | static void reg_update_last_request(struct regulatory_request *request) |
282 | { | |
255e25b0 LR |
283 | struct regulatory_request *lr; |
284 | ||
285 | lr = get_last_request(); | |
286 | if (lr == request) | |
287 | return; | |
288 | ||
c888393b | 289 | reg_free_last_request(); |
05f1a3ea LR |
290 | rcu_assign_pointer(last_request, request); |
291 | } | |
292 | ||
379b82f4 JB |
293 | static void reset_regdomains(bool full_reset, |
294 | const struct ieee80211_regdomain *new_regdom) | |
734366de | 295 | { |
458f4f9e JB |
296 | const struct ieee80211_regdomain *r; |
297 | ||
38fd2143 | 298 | ASSERT_RTNL(); |
e8da2bb4 | 299 | |
458f4f9e JB |
300 | r = get_cfg80211_regdom(); |
301 | ||
942b25cf | 302 | /* avoid freeing static information or freeing something twice */ |
458f4f9e JB |
303 | if (r == cfg80211_world_regdom) |
304 | r = NULL; | |
942b25cf JB |
305 | if (cfg80211_world_regdom == &world_regdom) |
306 | cfg80211_world_regdom = NULL; | |
458f4f9e JB |
307 | if (r == &world_regdom) |
308 | r = NULL; | |
942b25cf | 309 | |
458f4f9e JB |
310 | rcu_free_regdom(r); |
311 | rcu_free_regdom(cfg80211_world_regdom); | |
734366de | 312 | |
a3d2eaf0 | 313 | cfg80211_world_regdom = &world_regdom; |
458f4f9e | 314 | rcu_assign_pointer(cfg80211_regdomain, new_regdom); |
a042994d LR |
315 | |
316 | if (!full_reset) | |
317 | return; | |
318 | ||
05f1a3ea | 319 | reg_update_last_request(&core_request_world); |
734366de JB |
320 | } |
321 | ||
fb1fc7ad LR |
322 | /* |
323 | * Dynamic world regulatory domain requested by the wireless | |
324 | * core upon initialization | |
325 | */ | |
a3d2eaf0 | 326 | static void update_world_regdomain(const struct ieee80211_regdomain *rd) |
734366de | 327 | { |
c492db37 | 328 | struct regulatory_request *lr; |
734366de | 329 | |
c492db37 JB |
330 | lr = get_last_request(); |
331 | ||
332 | WARN_ON(!lr); | |
734366de | 333 | |
379b82f4 | 334 | reset_regdomains(false, rd); |
734366de JB |
335 | |
336 | cfg80211_world_regdom = rd; | |
734366de | 337 | } |
734366de | 338 | |
a3d2eaf0 | 339 | bool is_world_regdom(const char *alpha2) |
b2e1b302 LR |
340 | { |
341 | if (!alpha2) | |
342 | return false; | |
1a919318 | 343 | return alpha2[0] == '0' && alpha2[1] == '0'; |
b2e1b302 | 344 | } |
8318d78a | 345 | |
a3d2eaf0 | 346 | static bool is_alpha2_set(const char *alpha2) |
b2e1b302 LR |
347 | { |
348 | if (!alpha2) | |
349 | return false; | |
1a919318 | 350 | return alpha2[0] && alpha2[1]; |
b2e1b302 | 351 | } |
8318d78a | 352 | |
a3d2eaf0 | 353 | static bool is_unknown_alpha2(const char *alpha2) |
b2e1b302 LR |
354 | { |
355 | if (!alpha2) | |
356 | return false; | |
fb1fc7ad LR |
357 | /* |
358 | * Special case where regulatory domain was built by driver | |
359 | * but a specific alpha2 cannot be determined | |
360 | */ | |
1a919318 | 361 | return alpha2[0] == '9' && alpha2[1] == '9'; |
b2e1b302 | 362 | } |
8318d78a | 363 | |
3f2355cb LR |
364 | static bool is_intersected_alpha2(const char *alpha2) |
365 | { | |
366 | if (!alpha2) | |
367 | return false; | |
fb1fc7ad LR |
368 | /* |
369 | * Special case where regulatory domain is the | |
3f2355cb | 370 | * result of an intersection between two regulatory domain |
fb1fc7ad LR |
371 | * structures |
372 | */ | |
1a919318 | 373 | return alpha2[0] == '9' && alpha2[1] == '8'; |
3f2355cb LR |
374 | } |
375 | ||
a3d2eaf0 | 376 | static bool is_an_alpha2(const char *alpha2) |
b2e1b302 LR |
377 | { |
378 | if (!alpha2) | |
379 | return false; | |
1a919318 | 380 | return isalpha(alpha2[0]) && isalpha(alpha2[1]); |
b2e1b302 | 381 | } |
8318d78a | 382 | |
a3d2eaf0 | 383 | static bool alpha2_equal(const char *alpha2_x, const char *alpha2_y) |
b2e1b302 LR |
384 | { |
385 | if (!alpha2_x || !alpha2_y) | |
386 | return false; | |
1a919318 | 387 | return alpha2_x[0] == alpha2_y[0] && alpha2_x[1] == alpha2_y[1]; |
b2e1b302 LR |
388 | } |
389 | ||
69b1572b | 390 | static bool regdom_changes(const char *alpha2) |
b2e1b302 | 391 | { |
458f4f9e | 392 | const struct ieee80211_regdomain *r = get_cfg80211_regdom(); |
761cf7ec | 393 | |
458f4f9e | 394 | if (!r) |
b2e1b302 | 395 | return true; |
458f4f9e | 396 | return !alpha2_equal(r->alpha2, alpha2); |
b2e1b302 LR |
397 | } |
398 | ||
09d989d1 LR |
399 | /* |
400 | * The NL80211_REGDOM_SET_BY_USER regdom alpha2 is cached, this lets | |
401 | * you know if a valid regulatory hint with NL80211_REGDOM_SET_BY_USER | |
402 | * has ever been issued. | |
403 | */ | |
404 | static bool is_user_regdom_saved(void) | |
405 | { | |
406 | if (user_alpha2[0] == '9' && user_alpha2[1] == '7') | |
407 | return false; | |
408 | ||
409 | /* This would indicate a mistake on the design */ | |
1a919318 | 410 | if (WARN(!is_world_regdom(user_alpha2) && !is_an_alpha2(user_alpha2), |
09d989d1 | 411 | "Unexpected user alpha2: %c%c\n", |
1a919318 | 412 | user_alpha2[0], user_alpha2[1])) |
09d989d1 LR |
413 | return false; |
414 | ||
415 | return true; | |
416 | } | |
417 | ||
e9763c3c JB |
418 | static const struct ieee80211_regdomain * |
419 | reg_copy_regd(const struct ieee80211_regdomain *src_regd) | |
3b377ea9 JL |
420 | { |
421 | struct ieee80211_regdomain *regd; | |
e9763c3c | 422 | int size_of_regd; |
3b377ea9 JL |
423 | unsigned int i; |
424 | ||
82f20856 JB |
425 | size_of_regd = |
426 | sizeof(struct ieee80211_regdomain) + | |
427 | src_regd->n_reg_rules * sizeof(struct ieee80211_reg_rule); | |
3b377ea9 JL |
428 | |
429 | regd = kzalloc(size_of_regd, GFP_KERNEL); | |
430 | if (!regd) | |
e9763c3c | 431 | return ERR_PTR(-ENOMEM); |
3b377ea9 JL |
432 | |
433 | memcpy(regd, src_regd, sizeof(struct ieee80211_regdomain)); | |
434 | ||
435 | for (i = 0; i < src_regd->n_reg_rules; i++) | |
436 | memcpy(®d->reg_rules[i], &src_regd->reg_rules[i], | |
e9763c3c | 437 | sizeof(struct ieee80211_reg_rule)); |
3b377ea9 | 438 | |
e9763c3c | 439 | return regd; |
3b377ea9 JL |
440 | } |
441 | ||
442 | #ifdef CONFIG_CFG80211_INTERNAL_REGDB | |
443 | struct reg_regdb_search_request { | |
444 | char alpha2[2]; | |
445 | struct list_head list; | |
446 | }; | |
447 | ||
448 | static LIST_HEAD(reg_regdb_search_list); | |
368d06f5 | 449 | static DEFINE_MUTEX(reg_regdb_search_mutex); |
3b377ea9 JL |
450 | |
451 | static void reg_regdb_search(struct work_struct *work) | |
452 | { | |
453 | struct reg_regdb_search_request *request; | |
e9763c3c JB |
454 | const struct ieee80211_regdomain *curdom, *regdom = NULL; |
455 | int i; | |
a85d0d7f | 456 | |
5fe231e8 | 457 | rtnl_lock(); |
3b377ea9 | 458 | |
368d06f5 | 459 | mutex_lock(®_regdb_search_mutex); |
3b377ea9 JL |
460 | while (!list_empty(®_regdb_search_list)) { |
461 | request = list_first_entry(®_regdb_search_list, | |
462 | struct reg_regdb_search_request, | |
463 | list); | |
464 | list_del(&request->list); | |
465 | ||
1a919318 | 466 | for (i = 0; i < reg_regdb_size; i++) { |
3b377ea9 JL |
467 | curdom = reg_regdb[i]; |
468 | ||
1a919318 | 469 | if (alpha2_equal(request->alpha2, curdom->alpha2)) { |
e9763c3c | 470 | regdom = reg_copy_regd(curdom); |
3b377ea9 JL |
471 | break; |
472 | } | |
473 | } | |
474 | ||
475 | kfree(request); | |
476 | } | |
368d06f5 | 477 | mutex_unlock(®_regdb_search_mutex); |
a85d0d7f | 478 | |
e9763c3c | 479 | if (!IS_ERR_OR_NULL(regdom)) |
a85d0d7f LR |
480 | set_regdom(regdom); |
481 | ||
5fe231e8 | 482 | rtnl_unlock(); |
3b377ea9 JL |
483 | } |
484 | ||
485 | static DECLARE_WORK(reg_regdb_work, reg_regdb_search); | |
486 | ||
487 | static void reg_regdb_query(const char *alpha2) | |
488 | { | |
489 | struct reg_regdb_search_request *request; | |
490 | ||
491 | if (!alpha2) | |
492 | return; | |
493 | ||
494 | request = kzalloc(sizeof(struct reg_regdb_search_request), GFP_KERNEL); | |
495 | if (!request) | |
496 | return; | |
497 | ||
498 | memcpy(request->alpha2, alpha2, 2); | |
499 | ||
368d06f5 | 500 | mutex_lock(®_regdb_search_mutex); |
3b377ea9 | 501 | list_add_tail(&request->list, ®_regdb_search_list); |
368d06f5 | 502 | mutex_unlock(®_regdb_search_mutex); |
3b377ea9 JL |
503 | |
504 | schedule_work(®_regdb_work); | |
505 | } | |
80007efe LR |
506 | |
507 | /* Feel free to add any other sanity checks here */ | |
508 | static void reg_regdb_size_check(void) | |
509 | { | |
510 | /* We should ideally BUILD_BUG_ON() but then random builds would fail */ | |
511 | WARN_ONCE(!reg_regdb_size, "db.txt is empty, you should update it..."); | |
512 | } | |
3b377ea9 | 513 | #else |
80007efe | 514 | static inline void reg_regdb_size_check(void) {} |
3b377ea9 JL |
515 | static inline void reg_regdb_query(const char *alpha2) {} |
516 | #endif /* CONFIG_CFG80211_INTERNAL_REGDB */ | |
517 | ||
fb1fc7ad LR |
518 | /* |
519 | * This lets us keep regulatory code which is updated on a regulatory | |
1226d258 | 520 | * basis in userspace. |
fb1fc7ad | 521 | */ |
b2e1b302 LR |
522 | static int call_crda(const char *alpha2) |
523 | { | |
1226d258 JB |
524 | char country[12]; |
525 | char *env[] = { country, NULL }; | |
526 | ||
527 | snprintf(country, sizeof(country), "COUNTRY=%c%c", | |
528 | alpha2[0], alpha2[1]); | |
529 | ||
b2e1b302 | 530 | if (!is_world_regdom((char *) alpha2)) |
e9c0268f | 531 | pr_info("Calling CRDA for country: %c%c\n", |
b2e1b302 LR |
532 | alpha2[0], alpha2[1]); |
533 | else | |
e9c0268f | 534 | pr_info("Calling CRDA to update world regulatory domain\n"); |
b2e1b302 | 535 | |
3b377ea9 JL |
536 | /* query internal regulatory database (if it exists) */ |
537 | reg_regdb_query(alpha2); | |
538 | ||
1226d258 | 539 | return kobject_uevent_env(®_pdev->dev.kobj, KOBJ_CHANGE, env); |
b2e1b302 LR |
540 | } |
541 | ||
fe6631ff LR |
542 | static enum reg_request_treatment |
543 | reg_call_crda(struct regulatory_request *request) | |
544 | { | |
545 | if (call_crda(request->alpha2)) | |
546 | return REG_REQ_IGNORE; | |
547 | return REG_REQ_OK; | |
548 | } | |
549 | ||
e438768f | 550 | bool reg_is_valid_request(const char *alpha2) |
b2e1b302 | 551 | { |
c492db37 | 552 | struct regulatory_request *lr = get_last_request(); |
61405e97 | 553 | |
c492db37 | 554 | if (!lr || lr->processed) |
f6037d09 JB |
555 | return false; |
556 | ||
c492db37 | 557 | return alpha2_equal(lr->alpha2, alpha2); |
b2e1b302 | 558 | } |
8318d78a | 559 | |
e3961af1 JD |
560 | static const struct ieee80211_regdomain *reg_get_regdomain(struct wiphy *wiphy) |
561 | { | |
562 | struct regulatory_request *lr = get_last_request(); | |
563 | ||
564 | /* | |
565 | * Follow the driver's regulatory domain, if present, unless a country | |
566 | * IE has been processed or a user wants to help complaince further | |
567 | */ | |
568 | if (lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && | |
569 | lr->initiator != NL80211_REGDOM_SET_BY_USER && | |
570 | wiphy->regd) | |
571 | return get_wiphy_regdom(wiphy); | |
572 | ||
573 | return get_cfg80211_regdom(); | |
574 | } | |
575 | ||
97524820 JD |
576 | unsigned int reg_get_max_bandwidth(const struct ieee80211_regdomain *rd, |
577 | const struct ieee80211_reg_rule *rule) | |
578 | { | |
579 | const struct ieee80211_freq_range *freq_range = &rule->freq_range; | |
580 | const struct ieee80211_freq_range *freq_range_tmp; | |
581 | const struct ieee80211_reg_rule *tmp; | |
582 | u32 start_freq, end_freq, idx, no; | |
583 | ||
584 | for (idx = 0; idx < rd->n_reg_rules; idx++) | |
585 | if (rule == &rd->reg_rules[idx]) | |
586 | break; | |
587 | ||
588 | if (idx == rd->n_reg_rules) | |
589 | return 0; | |
590 | ||
591 | /* get start_freq */ | |
592 | no = idx; | |
593 | ||
594 | while (no) { | |
595 | tmp = &rd->reg_rules[--no]; | |
596 | freq_range_tmp = &tmp->freq_range; | |
597 | ||
598 | if (freq_range_tmp->end_freq_khz < freq_range->start_freq_khz) | |
599 | break; | |
600 | ||
97524820 JD |
601 | freq_range = freq_range_tmp; |
602 | } | |
603 | ||
604 | start_freq = freq_range->start_freq_khz; | |
605 | ||
606 | /* get end_freq */ | |
607 | freq_range = &rule->freq_range; | |
608 | no = idx; | |
609 | ||
610 | while (no < rd->n_reg_rules - 1) { | |
611 | tmp = &rd->reg_rules[++no]; | |
612 | freq_range_tmp = &tmp->freq_range; | |
613 | ||
614 | if (freq_range_tmp->start_freq_khz > freq_range->end_freq_khz) | |
615 | break; | |
616 | ||
97524820 JD |
617 | freq_range = freq_range_tmp; |
618 | } | |
619 | ||
620 | end_freq = freq_range->end_freq_khz; | |
621 | ||
622 | return end_freq - start_freq; | |
623 | } | |
624 | ||
b2e1b302 | 625 | /* Sanity check on a regulatory rule */ |
a3d2eaf0 | 626 | static bool is_valid_reg_rule(const struct ieee80211_reg_rule *rule) |
8318d78a | 627 | { |
a3d2eaf0 | 628 | const struct ieee80211_freq_range *freq_range = &rule->freq_range; |
b2e1b302 LR |
629 | u32 freq_diff; |
630 | ||
91e99004 | 631 | if (freq_range->start_freq_khz <= 0 || freq_range->end_freq_khz <= 0) |
b2e1b302 LR |
632 | return false; |
633 | ||
634 | if (freq_range->start_freq_khz > freq_range->end_freq_khz) | |
635 | return false; | |
636 | ||
637 | freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz; | |
638 | ||
bd05f28e | 639 | if (freq_range->end_freq_khz <= freq_range->start_freq_khz || |
1a919318 | 640 | freq_range->max_bandwidth_khz > freq_diff) |
b2e1b302 LR |
641 | return false; |
642 | ||
643 | return true; | |
644 | } | |
645 | ||
a3d2eaf0 | 646 | static bool is_valid_rd(const struct ieee80211_regdomain *rd) |
b2e1b302 | 647 | { |
a3d2eaf0 | 648 | const struct ieee80211_reg_rule *reg_rule = NULL; |
b2e1b302 | 649 | unsigned int i; |
8318d78a | 650 | |
b2e1b302 LR |
651 | if (!rd->n_reg_rules) |
652 | return false; | |
8318d78a | 653 | |
88dc1c3f LR |
654 | if (WARN_ON(rd->n_reg_rules > NL80211_MAX_SUPP_REG_RULES)) |
655 | return false; | |
656 | ||
b2e1b302 LR |
657 | for (i = 0; i < rd->n_reg_rules; i++) { |
658 | reg_rule = &rd->reg_rules[i]; | |
659 | if (!is_valid_reg_rule(reg_rule)) | |
660 | return false; | |
661 | } | |
662 | ||
663 | return true; | |
8318d78a JB |
664 | } |
665 | ||
038659e7 | 666 | static bool reg_does_bw_fit(const struct ieee80211_freq_range *freq_range, |
fe7ef5e9 | 667 | u32 center_freq_khz, u32 bw_khz) |
b2e1b302 | 668 | { |
038659e7 LR |
669 | u32 start_freq_khz, end_freq_khz; |
670 | ||
671 | start_freq_khz = center_freq_khz - (bw_khz/2); | |
672 | end_freq_khz = center_freq_khz + (bw_khz/2); | |
673 | ||
674 | if (start_freq_khz >= freq_range->start_freq_khz && | |
675 | end_freq_khz <= freq_range->end_freq_khz) | |
676 | return true; | |
677 | ||
678 | return false; | |
b2e1b302 | 679 | } |
8318d78a | 680 | |
0c7dc45d LR |
681 | /** |
682 | * freq_in_rule_band - tells us if a frequency is in a frequency band | |
683 | * @freq_range: frequency rule we want to query | |
684 | * @freq_khz: frequency we are inquiring about | |
685 | * | |
686 | * This lets us know if a specific frequency rule is or is not relevant to | |
687 | * a specific frequency's band. Bands are device specific and artificial | |
64629b9d VK |
688 | * definitions (the "2.4 GHz band", the "5 GHz band" and the "60GHz band"), |
689 | * however it is safe for now to assume that a frequency rule should not be | |
690 | * part of a frequency's band if the start freq or end freq are off by more | |
691 | * than 2 GHz for the 2.4 and 5 GHz bands, and by more than 10 GHz for the | |
692 | * 60 GHz band. | |
0c7dc45d LR |
693 | * This resolution can be lowered and should be considered as we add |
694 | * regulatory rule support for other "bands". | |
695 | **/ | |
696 | static bool freq_in_rule_band(const struct ieee80211_freq_range *freq_range, | |
1a919318 | 697 | u32 freq_khz) |
0c7dc45d LR |
698 | { |
699 | #define ONE_GHZ_IN_KHZ 1000000 | |
64629b9d VK |
700 | /* |
701 | * From 802.11ad: directional multi-gigabit (DMG): | |
702 | * Pertaining to operation in a frequency band containing a channel | |
703 | * with the Channel starting frequency above 45 GHz. | |
704 | */ | |
705 | u32 limit = freq_khz > 45 * ONE_GHZ_IN_KHZ ? | |
706 | 10 * ONE_GHZ_IN_KHZ : 2 * ONE_GHZ_IN_KHZ; | |
707 | if (abs(freq_khz - freq_range->start_freq_khz) <= limit) | |
0c7dc45d | 708 | return true; |
64629b9d | 709 | if (abs(freq_khz - freq_range->end_freq_khz) <= limit) |
0c7dc45d LR |
710 | return true; |
711 | return false; | |
712 | #undef ONE_GHZ_IN_KHZ | |
713 | } | |
714 | ||
adbfb058 LR |
715 | /* |
716 | * Later on we can perhaps use the more restrictive DFS | |
717 | * region but we don't have information for that yet so | |
718 | * for now simply disallow conflicts. | |
719 | */ | |
720 | static enum nl80211_dfs_regions | |
721 | reg_intersect_dfs_region(const enum nl80211_dfs_regions dfs_region1, | |
722 | const enum nl80211_dfs_regions dfs_region2) | |
723 | { | |
724 | if (dfs_region1 != dfs_region2) | |
725 | return NL80211_DFS_UNSET; | |
726 | return dfs_region1; | |
727 | } | |
728 | ||
fb1fc7ad LR |
729 | /* |
730 | * Helper for regdom_intersect(), this does the real | |
731 | * mathematical intersection fun | |
732 | */ | |
97524820 JD |
733 | static int reg_rules_intersect(const struct ieee80211_regdomain *rd1, |
734 | const struct ieee80211_regdomain *rd2, | |
735 | const struct ieee80211_reg_rule *rule1, | |
1a919318 JB |
736 | const struct ieee80211_reg_rule *rule2, |
737 | struct ieee80211_reg_rule *intersected_rule) | |
9c96477d LR |
738 | { |
739 | const struct ieee80211_freq_range *freq_range1, *freq_range2; | |
740 | struct ieee80211_freq_range *freq_range; | |
741 | const struct ieee80211_power_rule *power_rule1, *power_rule2; | |
742 | struct ieee80211_power_rule *power_rule; | |
97524820 | 743 | u32 freq_diff, max_bandwidth1, max_bandwidth2; |
9c96477d LR |
744 | |
745 | freq_range1 = &rule1->freq_range; | |
746 | freq_range2 = &rule2->freq_range; | |
747 | freq_range = &intersected_rule->freq_range; | |
748 | ||
749 | power_rule1 = &rule1->power_rule; | |
750 | power_rule2 = &rule2->power_rule; | |
751 | power_rule = &intersected_rule->power_rule; | |
752 | ||
753 | freq_range->start_freq_khz = max(freq_range1->start_freq_khz, | |
1a919318 | 754 | freq_range2->start_freq_khz); |
9c96477d | 755 | freq_range->end_freq_khz = min(freq_range1->end_freq_khz, |
1a919318 | 756 | freq_range2->end_freq_khz); |
97524820 JD |
757 | |
758 | max_bandwidth1 = freq_range1->max_bandwidth_khz; | |
759 | max_bandwidth2 = freq_range2->max_bandwidth_khz; | |
760 | ||
b0dfd2ea JD |
761 | if (rule1->flags & NL80211_RRF_AUTO_BW) |
762 | max_bandwidth1 = reg_get_max_bandwidth(rd1, rule1); | |
763 | if (rule2->flags & NL80211_RRF_AUTO_BW) | |
764 | max_bandwidth2 = reg_get_max_bandwidth(rd2, rule2); | |
97524820 JD |
765 | |
766 | freq_range->max_bandwidth_khz = min(max_bandwidth1, max_bandwidth2); | |
9c96477d | 767 | |
b0dfd2ea JD |
768 | intersected_rule->flags = rule1->flags | rule2->flags; |
769 | ||
770 | /* | |
771 | * In case NL80211_RRF_AUTO_BW requested for both rules | |
772 | * set AUTO_BW in intersected rule also. Next we will | |
773 | * calculate BW correctly in handle_channel function. | |
774 | * In other case remove AUTO_BW flag while we calculate | |
775 | * maximum bandwidth correctly and auto calculation is | |
776 | * not required. | |
777 | */ | |
778 | if ((rule1->flags & NL80211_RRF_AUTO_BW) && | |
779 | (rule2->flags & NL80211_RRF_AUTO_BW)) | |
780 | intersected_rule->flags |= NL80211_RRF_AUTO_BW; | |
781 | else | |
782 | intersected_rule->flags &= ~NL80211_RRF_AUTO_BW; | |
783 | ||
9c96477d LR |
784 | freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz; |
785 | if (freq_range->max_bandwidth_khz > freq_diff) | |
786 | freq_range->max_bandwidth_khz = freq_diff; | |
787 | ||
788 | power_rule->max_eirp = min(power_rule1->max_eirp, | |
789 | power_rule2->max_eirp); | |
790 | power_rule->max_antenna_gain = min(power_rule1->max_antenna_gain, | |
791 | power_rule2->max_antenna_gain); | |
792 | ||
089027e5 JD |
793 | intersected_rule->dfs_cac_ms = max(rule1->dfs_cac_ms, |
794 | rule2->dfs_cac_ms); | |
795 | ||
9c96477d LR |
796 | if (!is_valid_reg_rule(intersected_rule)) |
797 | return -EINVAL; | |
798 | ||
799 | return 0; | |
800 | } | |
801 | ||
a62a1aed EP |
802 | /* check whether old rule contains new rule */ |
803 | static bool rule_contains(struct ieee80211_reg_rule *r1, | |
804 | struct ieee80211_reg_rule *r2) | |
805 | { | |
806 | /* for simplicity, currently consider only same flags */ | |
807 | if (r1->flags != r2->flags) | |
808 | return false; | |
809 | ||
810 | /* verify r1 is more restrictive */ | |
811 | if ((r1->power_rule.max_antenna_gain > | |
812 | r2->power_rule.max_antenna_gain) || | |
813 | r1->power_rule.max_eirp > r2->power_rule.max_eirp) | |
814 | return false; | |
815 | ||
816 | /* make sure r2's range is contained within r1 */ | |
817 | if (r1->freq_range.start_freq_khz > r2->freq_range.start_freq_khz || | |
818 | r1->freq_range.end_freq_khz < r2->freq_range.end_freq_khz) | |
819 | return false; | |
820 | ||
821 | /* and finally verify that r1.max_bw >= r2.max_bw */ | |
822 | if (r1->freq_range.max_bandwidth_khz < | |
823 | r2->freq_range.max_bandwidth_khz) | |
824 | return false; | |
825 | ||
826 | return true; | |
827 | } | |
828 | ||
829 | /* add or extend current rules. do nothing if rule is already contained */ | |
830 | static void add_rule(struct ieee80211_reg_rule *rule, | |
831 | struct ieee80211_reg_rule *reg_rules, u32 *n_rules) | |
832 | { | |
833 | struct ieee80211_reg_rule *tmp_rule; | |
834 | int i; | |
835 | ||
836 | for (i = 0; i < *n_rules; i++) { | |
837 | tmp_rule = ®_rules[i]; | |
838 | /* rule is already contained - do nothing */ | |
839 | if (rule_contains(tmp_rule, rule)) | |
840 | return; | |
841 | ||
842 | /* extend rule if possible */ | |
843 | if (rule_contains(rule, tmp_rule)) { | |
844 | memcpy(tmp_rule, rule, sizeof(*rule)); | |
845 | return; | |
846 | } | |
847 | } | |
848 | ||
849 | memcpy(®_rules[*n_rules], rule, sizeof(*rule)); | |
850 | (*n_rules)++; | |
851 | } | |
852 | ||
9c96477d LR |
853 | /** |
854 | * regdom_intersect - do the intersection between two regulatory domains | |
855 | * @rd1: first regulatory domain | |
856 | * @rd2: second regulatory domain | |
857 | * | |
858 | * Use this function to get the intersection between two regulatory domains. | |
859 | * Once completed we will mark the alpha2 for the rd as intersected, "98", | |
860 | * as no one single alpha2 can represent this regulatory domain. | |
861 | * | |
862 | * Returns a pointer to the regulatory domain structure which will hold the | |
863 | * resulting intersection of rules between rd1 and rd2. We will | |
864 | * kzalloc() this structure for you. | |
865 | */ | |
1a919318 JB |
866 | static struct ieee80211_regdomain * |
867 | regdom_intersect(const struct ieee80211_regdomain *rd1, | |
868 | const struct ieee80211_regdomain *rd2) | |
9c96477d LR |
869 | { |
870 | int r, size_of_regd; | |
871 | unsigned int x, y; | |
a62a1aed | 872 | unsigned int num_rules = 0; |
9c96477d | 873 | const struct ieee80211_reg_rule *rule1, *rule2; |
a62a1aed | 874 | struct ieee80211_reg_rule intersected_rule; |
9c96477d | 875 | struct ieee80211_regdomain *rd; |
9c96477d LR |
876 | |
877 | if (!rd1 || !rd2) | |
878 | return NULL; | |
879 | ||
fb1fc7ad LR |
880 | /* |
881 | * First we get a count of the rules we'll need, then we actually | |
9c96477d LR |
882 | * build them. This is to so we can malloc() and free() a |
883 | * regdomain once. The reason we use reg_rules_intersect() here | |
884 | * is it will return -EINVAL if the rule computed makes no sense. | |
fb1fc7ad LR |
885 | * All rules that do check out OK are valid. |
886 | */ | |
9c96477d LR |
887 | |
888 | for (x = 0; x < rd1->n_reg_rules; x++) { | |
889 | rule1 = &rd1->reg_rules[x]; | |
890 | for (y = 0; y < rd2->n_reg_rules; y++) { | |
891 | rule2 = &rd2->reg_rules[y]; | |
97524820 | 892 | if (!reg_rules_intersect(rd1, rd2, rule1, rule2, |
a62a1aed | 893 | &intersected_rule)) |
9c96477d | 894 | num_rules++; |
9c96477d LR |
895 | } |
896 | } | |
897 | ||
898 | if (!num_rules) | |
899 | return NULL; | |
900 | ||
901 | size_of_regd = sizeof(struct ieee80211_regdomain) + | |
82f20856 | 902 | num_rules * sizeof(struct ieee80211_reg_rule); |
9c96477d LR |
903 | |
904 | rd = kzalloc(size_of_regd, GFP_KERNEL); | |
905 | if (!rd) | |
906 | return NULL; | |
907 | ||
a62a1aed | 908 | for (x = 0; x < rd1->n_reg_rules; x++) { |
9c96477d | 909 | rule1 = &rd1->reg_rules[x]; |
a62a1aed | 910 | for (y = 0; y < rd2->n_reg_rules; y++) { |
9c96477d | 911 | rule2 = &rd2->reg_rules[y]; |
97524820 | 912 | r = reg_rules_intersect(rd1, rd2, rule1, rule2, |
a62a1aed | 913 | &intersected_rule); |
fb1fc7ad LR |
914 | /* |
915 | * No need to memset here the intersected rule here as | |
916 | * we're not using the stack anymore | |
917 | */ | |
9c96477d LR |
918 | if (r) |
919 | continue; | |
9c96477d | 920 | |
a62a1aed EP |
921 | add_rule(&intersected_rule, rd->reg_rules, |
922 | &rd->n_reg_rules); | |
923 | } | |
9c96477d LR |
924 | } |
925 | ||
9c96477d LR |
926 | rd->alpha2[0] = '9'; |
927 | rd->alpha2[1] = '8'; | |
adbfb058 LR |
928 | rd->dfs_region = reg_intersect_dfs_region(rd1->dfs_region, |
929 | rd2->dfs_region); | |
9c96477d LR |
930 | |
931 | return rd; | |
932 | } | |
933 | ||
fb1fc7ad LR |
934 | /* |
935 | * XXX: add support for the rest of enum nl80211_reg_rule_flags, we may | |
936 | * want to just have the channel structure use these | |
937 | */ | |
b2e1b302 LR |
938 | static u32 map_regdom_flags(u32 rd_flags) |
939 | { | |
940 | u32 channel_flags = 0; | |
8fe02e16 LR |
941 | if (rd_flags & NL80211_RRF_NO_IR_ALL) |
942 | channel_flags |= IEEE80211_CHAN_NO_IR; | |
b2e1b302 LR |
943 | if (rd_flags & NL80211_RRF_DFS) |
944 | channel_flags |= IEEE80211_CHAN_RADAR; | |
03f6b084 SF |
945 | if (rd_flags & NL80211_RRF_NO_OFDM) |
946 | channel_flags |= IEEE80211_CHAN_NO_OFDM; | |
570dbde1 DS |
947 | if (rd_flags & NL80211_RRF_NO_OUTDOOR) |
948 | channel_flags |= IEEE80211_CHAN_INDOOR_ONLY; | |
b2e1b302 LR |
949 | return channel_flags; |
950 | } | |
951 | ||
361c9c8b JB |
952 | static const struct ieee80211_reg_rule * |
953 | freq_reg_info_regd(struct wiphy *wiphy, u32 center_freq, | |
954 | const struct ieee80211_regdomain *regd) | |
8318d78a JB |
955 | { |
956 | int i; | |
0c7dc45d | 957 | bool band_rule_found = false; |
038659e7 LR |
958 | bool bw_fits = false; |
959 | ||
3e0c3ff3 | 960 | if (!regd) |
361c9c8b | 961 | return ERR_PTR(-EINVAL); |
b2e1b302 | 962 | |
3e0c3ff3 | 963 | for (i = 0; i < regd->n_reg_rules; i++) { |
b2e1b302 LR |
964 | const struct ieee80211_reg_rule *rr; |
965 | const struct ieee80211_freq_range *fr = NULL; | |
b2e1b302 | 966 | |
3e0c3ff3 | 967 | rr = ®d->reg_rules[i]; |
b2e1b302 | 968 | fr = &rr->freq_range; |
0c7dc45d | 969 | |
fb1fc7ad LR |
970 | /* |
971 | * We only need to know if one frequency rule was | |
0c7dc45d | 972 | * was in center_freq's band, that's enough, so lets |
fb1fc7ad LR |
973 | * not overwrite it once found |
974 | */ | |
0c7dc45d LR |
975 | if (!band_rule_found) |
976 | band_rule_found = freq_in_rule_band(fr, center_freq); | |
977 | ||
e33e2241 | 978 | bw_fits = reg_does_bw_fit(fr, center_freq, MHZ_TO_KHZ(20)); |
0c7dc45d | 979 | |
361c9c8b JB |
980 | if (band_rule_found && bw_fits) |
981 | return rr; | |
8318d78a JB |
982 | } |
983 | ||
0c7dc45d | 984 | if (!band_rule_found) |
361c9c8b | 985 | return ERR_PTR(-ERANGE); |
0c7dc45d | 986 | |
361c9c8b | 987 | return ERR_PTR(-EINVAL); |
b2e1b302 LR |
988 | } |
989 | ||
361c9c8b JB |
990 | const struct ieee80211_reg_rule *freq_reg_info(struct wiphy *wiphy, |
991 | u32 center_freq) | |
1fa25e41 | 992 | { |
5d885b99 | 993 | const struct ieee80211_regdomain *regd; |
1a919318 | 994 | |
e3961af1 | 995 | regd = reg_get_regdomain(wiphy); |
5d885b99 | 996 | |
361c9c8b | 997 | return freq_reg_info_regd(wiphy, center_freq, regd); |
1fa25e41 | 998 | } |
4f366c5d | 999 | EXPORT_SYMBOL(freq_reg_info); |
b2e1b302 | 1000 | |
034c6d6e | 1001 | const char *reg_initiator_name(enum nl80211_reg_initiator initiator) |
926a0a09 LR |
1002 | { |
1003 | switch (initiator) { | |
1004 | case NL80211_REGDOM_SET_BY_CORE: | |
034c6d6e | 1005 | return "core"; |
926a0a09 | 1006 | case NL80211_REGDOM_SET_BY_USER: |
034c6d6e | 1007 | return "user"; |
926a0a09 | 1008 | case NL80211_REGDOM_SET_BY_DRIVER: |
034c6d6e | 1009 | return "driver"; |
926a0a09 | 1010 | case NL80211_REGDOM_SET_BY_COUNTRY_IE: |
034c6d6e | 1011 | return "country IE"; |
926a0a09 LR |
1012 | default: |
1013 | WARN_ON(1); | |
034c6d6e | 1014 | return "bug"; |
926a0a09 LR |
1015 | } |
1016 | } | |
034c6d6e | 1017 | EXPORT_SYMBOL(reg_initiator_name); |
e702d3cf | 1018 | |
034c6d6e | 1019 | #ifdef CONFIG_CFG80211_REG_DEBUG |
b0dfd2ea JD |
1020 | static void chan_reg_rule_print_dbg(const struct ieee80211_regdomain *regd, |
1021 | struct ieee80211_channel *chan, | |
e702d3cf LR |
1022 | const struct ieee80211_reg_rule *reg_rule) |
1023 | { | |
1024 | const struct ieee80211_power_rule *power_rule; | |
1025 | const struct ieee80211_freq_range *freq_range; | |
b0dfd2ea | 1026 | char max_antenna_gain[32], bw[32]; |
e702d3cf LR |
1027 | |
1028 | power_rule = ®_rule->power_rule; | |
1029 | freq_range = ®_rule->freq_range; | |
1030 | ||
1031 | if (!power_rule->max_antenna_gain) | |
b0dfd2ea | 1032 | snprintf(max_antenna_gain, sizeof(max_antenna_gain), "N/A"); |
e702d3cf | 1033 | else |
b0dfd2ea JD |
1034 | snprintf(max_antenna_gain, sizeof(max_antenna_gain), "%d", |
1035 | power_rule->max_antenna_gain); | |
1036 | ||
1037 | if (reg_rule->flags & NL80211_RRF_AUTO_BW) | |
1038 | snprintf(bw, sizeof(bw), "%d KHz, %d KHz AUTO", | |
1039 | freq_range->max_bandwidth_khz, | |
1040 | reg_get_max_bandwidth(regd, reg_rule)); | |
1041 | else | |
1042 | snprintf(bw, sizeof(bw), "%d KHz", | |
1043 | freq_range->max_bandwidth_khz); | |
e702d3cf | 1044 | |
fe7ef5e9 JB |
1045 | REG_DBG_PRINT("Updating information on frequency %d MHz with regulatory rule:\n", |
1046 | chan->center_freq); | |
e702d3cf | 1047 | |
b0dfd2ea | 1048 | REG_DBG_PRINT("%d KHz - %d KHz @ %s), (%s mBi, %d mBm)\n", |
1a919318 | 1049 | freq_range->start_freq_khz, freq_range->end_freq_khz, |
b0dfd2ea | 1050 | bw, max_antenna_gain, |
e702d3cf LR |
1051 | power_rule->max_eirp); |
1052 | } | |
1053 | #else | |
b0dfd2ea JD |
1054 | static void chan_reg_rule_print_dbg(const struct ieee80211_regdomain *regd, |
1055 | struct ieee80211_channel *chan, | |
e702d3cf LR |
1056 | const struct ieee80211_reg_rule *reg_rule) |
1057 | { | |
1058 | return; | |
1059 | } | |
926a0a09 LR |
1060 | #endif |
1061 | ||
e33e2241 JB |
1062 | /* |
1063 | * Note that right now we assume the desired channel bandwidth | |
1064 | * is always 20 MHz for each individual channel (HT40 uses 20 MHz | |
1065 | * per channel, the primary and the extension channel). | |
038659e7 | 1066 | */ |
7ca43d03 LR |
1067 | static void handle_channel(struct wiphy *wiphy, |
1068 | enum nl80211_reg_initiator initiator, | |
fdc9d7b2 | 1069 | struct ieee80211_channel *chan) |
b2e1b302 | 1070 | { |
038659e7 | 1071 | u32 flags, bw_flags = 0; |
b2e1b302 LR |
1072 | const struct ieee80211_reg_rule *reg_rule = NULL; |
1073 | const struct ieee80211_power_rule *power_rule = NULL; | |
038659e7 | 1074 | const struct ieee80211_freq_range *freq_range = NULL; |
fe33eb39 | 1075 | struct wiphy *request_wiphy = NULL; |
c492db37 | 1076 | struct regulatory_request *lr = get_last_request(); |
97524820 JD |
1077 | const struct ieee80211_regdomain *regd; |
1078 | u32 max_bandwidth_khz; | |
a92a3ce7 | 1079 | |
c492db37 | 1080 | request_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx); |
a92a3ce7 LR |
1081 | |
1082 | flags = chan->orig_flags; | |
b2e1b302 | 1083 | |
361c9c8b JB |
1084 | reg_rule = freq_reg_info(wiphy, MHZ_TO_KHZ(chan->center_freq)); |
1085 | if (IS_ERR(reg_rule)) { | |
ca4ffe8f LR |
1086 | /* |
1087 | * We will disable all channels that do not match our | |
25985edc | 1088 | * received regulatory rule unless the hint is coming |
ca4ffe8f LR |
1089 | * from a Country IE and the Country IE had no information |
1090 | * about a band. The IEEE 802.11 spec allows for an AP | |
1091 | * to send only a subset of the regulatory rules allowed, | |
1092 | * so an AP in the US that only supports 2.4 GHz may only send | |
1093 | * a country IE with information for the 2.4 GHz band | |
1094 | * while 5 GHz is still supported. | |
1095 | */ | |
1096 | if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE && | |
361c9c8b | 1097 | PTR_ERR(reg_rule) == -ERANGE) |
ca4ffe8f LR |
1098 | return; |
1099 | ||
cc493e4f LR |
1100 | if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER && |
1101 | request_wiphy && request_wiphy == wiphy && | |
a2f73b6c | 1102 | request_wiphy->regulatory_flags & REGULATORY_STRICT_REG) { |
cc493e4f LR |
1103 | REG_DBG_PRINT("Disabling freq %d MHz for good\n", |
1104 | chan->center_freq); | |
1105 | chan->orig_flags |= IEEE80211_CHAN_DISABLED; | |
1106 | chan->flags = chan->orig_flags; | |
1107 | } else { | |
1108 | REG_DBG_PRINT("Disabling freq %d MHz\n", | |
1109 | chan->center_freq); | |
1110 | chan->flags |= IEEE80211_CHAN_DISABLED; | |
1111 | } | |
8318d78a | 1112 | return; |
ca4ffe8f | 1113 | } |
8318d78a | 1114 | |
b0dfd2ea JD |
1115 | regd = reg_get_regdomain(wiphy); |
1116 | chan_reg_rule_print_dbg(regd, chan, reg_rule); | |
e702d3cf | 1117 | |
b2e1b302 | 1118 | power_rule = ®_rule->power_rule; |
038659e7 LR |
1119 | freq_range = ®_rule->freq_range; |
1120 | ||
97524820 JD |
1121 | max_bandwidth_khz = freq_range->max_bandwidth_khz; |
1122 | /* Check if auto calculation requested */ | |
b0dfd2ea | 1123 | if (reg_rule->flags & NL80211_RRF_AUTO_BW) |
97524820 | 1124 | max_bandwidth_khz = reg_get_max_bandwidth(regd, reg_rule); |
97524820 JD |
1125 | |
1126 | if (max_bandwidth_khz < MHZ_TO_KHZ(40)) | |
e33e2241 | 1127 | bw_flags = IEEE80211_CHAN_NO_HT40; |
97524820 | 1128 | if (max_bandwidth_khz < MHZ_TO_KHZ(80)) |
c7a6ee27 | 1129 | bw_flags |= IEEE80211_CHAN_NO_80MHZ; |
97524820 | 1130 | if (max_bandwidth_khz < MHZ_TO_KHZ(160)) |
c7a6ee27 | 1131 | bw_flags |= IEEE80211_CHAN_NO_160MHZ; |
b2e1b302 | 1132 | |
c492db37 | 1133 | if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER && |
806a9e39 | 1134 | request_wiphy && request_wiphy == wiphy && |
a2f73b6c | 1135 | request_wiphy->regulatory_flags & REGULATORY_STRICT_REG) { |
fb1fc7ad | 1136 | /* |
25985edc | 1137 | * This guarantees the driver's requested regulatory domain |
f976376d | 1138 | * will always be used as a base for further regulatory |
fb1fc7ad LR |
1139 | * settings |
1140 | */ | |
f976376d | 1141 | chan->flags = chan->orig_flags = |
038659e7 | 1142 | map_regdom_flags(reg_rule->flags) | bw_flags; |
f976376d LR |
1143 | chan->max_antenna_gain = chan->orig_mag = |
1144 | (int) MBI_TO_DBI(power_rule->max_antenna_gain); | |
279f0f55 | 1145 | chan->max_reg_power = chan->max_power = chan->orig_mpwr = |
f976376d | 1146 | (int) MBM_TO_DBM(power_rule->max_eirp); |
4f267c11 JD |
1147 | |
1148 | if (chan->flags & IEEE80211_CHAN_RADAR) { | |
1149 | chan->dfs_cac_ms = IEEE80211_DFS_MIN_CAC_TIME_MS; | |
1150 | if (reg_rule->dfs_cac_ms) | |
1151 | chan->dfs_cac_ms = reg_rule->dfs_cac_ms; | |
1152 | } | |
1153 | ||
f976376d LR |
1154 | return; |
1155 | } | |
1156 | ||
04f39047 SW |
1157 | chan->dfs_state = NL80211_DFS_USABLE; |
1158 | chan->dfs_state_entered = jiffies; | |
1159 | ||
aa3d7eef | 1160 | chan->beacon_found = false; |
038659e7 | 1161 | chan->flags = flags | bw_flags | map_regdom_flags(reg_rule->flags); |
1a919318 JB |
1162 | chan->max_antenna_gain = |
1163 | min_t(int, chan->orig_mag, | |
1164 | MBI_TO_DBI(power_rule->max_antenna_gain)); | |
eccc068e | 1165 | chan->max_reg_power = (int) MBM_TO_DBM(power_rule->max_eirp); |
089027e5 JD |
1166 | |
1167 | if (chan->flags & IEEE80211_CHAN_RADAR) { | |
1168 | if (reg_rule->dfs_cac_ms) | |
1169 | chan->dfs_cac_ms = reg_rule->dfs_cac_ms; | |
1170 | else | |
1171 | chan->dfs_cac_ms = IEEE80211_DFS_MIN_CAC_TIME_MS; | |
1172 | } | |
1173 | ||
5e31fc08 SG |
1174 | if (chan->orig_mpwr) { |
1175 | /* | |
a09a85a0 LR |
1176 | * Devices that use REGULATORY_COUNTRY_IE_FOLLOW_POWER |
1177 | * will always follow the passed country IE power settings. | |
5e31fc08 SG |
1178 | */ |
1179 | if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE && | |
a09a85a0 | 1180 | wiphy->regulatory_flags & REGULATORY_COUNTRY_IE_FOLLOW_POWER) |
5e31fc08 SG |
1181 | chan->max_power = chan->max_reg_power; |
1182 | else | |
1183 | chan->max_power = min(chan->orig_mpwr, | |
1184 | chan->max_reg_power); | |
1185 | } else | |
1186 | chan->max_power = chan->max_reg_power; | |
8318d78a JB |
1187 | } |
1188 | ||
7ca43d03 | 1189 | static void handle_band(struct wiphy *wiphy, |
fdc9d7b2 JB |
1190 | enum nl80211_reg_initiator initiator, |
1191 | struct ieee80211_supported_band *sband) | |
8318d78a | 1192 | { |
a92a3ce7 | 1193 | unsigned int i; |
a92a3ce7 | 1194 | |
fdc9d7b2 JB |
1195 | if (!sband) |
1196 | return; | |
8318d78a JB |
1197 | |
1198 | for (i = 0; i < sband->n_channels; i++) | |
fdc9d7b2 | 1199 | handle_channel(wiphy, initiator, &sband->channels[i]); |
8318d78a JB |
1200 | } |
1201 | ||
57b5ce07 LR |
1202 | static bool reg_request_cell_base(struct regulatory_request *request) |
1203 | { | |
1204 | if (request->initiator != NL80211_REGDOM_SET_BY_USER) | |
1205 | return false; | |
1a919318 | 1206 | return request->user_reg_hint_type == NL80211_USER_REG_HINT_CELL_BASE; |
57b5ce07 LR |
1207 | } |
1208 | ||
52616f2b IP |
1209 | static bool reg_request_indoor(struct regulatory_request *request) |
1210 | { | |
1211 | if (request->initiator != NL80211_REGDOM_SET_BY_USER) | |
1212 | return false; | |
1213 | return request->user_reg_hint_type == NL80211_USER_REG_HINT_INDOOR; | |
1214 | } | |
1215 | ||
57b5ce07 LR |
1216 | bool reg_last_request_cell_base(void) |
1217 | { | |
38fd2143 | 1218 | return reg_request_cell_base(get_last_request()); |
57b5ce07 LR |
1219 | } |
1220 | ||
94fc661f | 1221 | #ifdef CONFIG_CFG80211_REG_CELLULAR_HINTS |
57b5ce07 | 1222 | /* Core specific check */ |
2f92212b JB |
1223 | static enum reg_request_treatment |
1224 | reg_ignore_cell_hint(struct regulatory_request *pending_request) | |
57b5ce07 | 1225 | { |
c492db37 JB |
1226 | struct regulatory_request *lr = get_last_request(); |
1227 | ||
57b5ce07 | 1228 | if (!reg_num_devs_support_basehint) |
2f92212b | 1229 | return REG_REQ_IGNORE; |
57b5ce07 | 1230 | |
c492db37 | 1231 | if (reg_request_cell_base(lr) && |
1a919318 | 1232 | !regdom_changes(pending_request->alpha2)) |
2f92212b | 1233 | return REG_REQ_ALREADY_SET; |
1a919318 | 1234 | |
2f92212b | 1235 | return REG_REQ_OK; |
57b5ce07 LR |
1236 | } |
1237 | ||
1238 | /* Device specific check */ | |
1239 | static bool reg_dev_ignore_cell_hint(struct wiphy *wiphy) | |
1240 | { | |
1a919318 | 1241 | return !(wiphy->features & NL80211_FEATURE_CELL_BASE_REG_HINTS); |
57b5ce07 LR |
1242 | } |
1243 | #else | |
1244 | static int reg_ignore_cell_hint(struct regulatory_request *pending_request) | |
1245 | { | |
2f92212b | 1246 | return REG_REQ_IGNORE; |
57b5ce07 | 1247 | } |
1a919318 JB |
1248 | |
1249 | static bool reg_dev_ignore_cell_hint(struct wiphy *wiphy) | |
57b5ce07 LR |
1250 | { |
1251 | return true; | |
1252 | } | |
1253 | #endif | |
1254 | ||
fa1fb9cb LR |
1255 | static bool wiphy_strict_alpha2_regd(struct wiphy *wiphy) |
1256 | { | |
a2f73b6c LR |
1257 | if (wiphy->regulatory_flags & REGULATORY_STRICT_REG && |
1258 | !(wiphy->regulatory_flags & REGULATORY_CUSTOM_REG)) | |
fa1fb9cb LR |
1259 | return true; |
1260 | return false; | |
1261 | } | |
57b5ce07 | 1262 | |
7db90f4a LR |
1263 | static bool ignore_reg_update(struct wiphy *wiphy, |
1264 | enum nl80211_reg_initiator initiator) | |
14b9815a | 1265 | { |
c492db37 JB |
1266 | struct regulatory_request *lr = get_last_request(); |
1267 | ||
1268 | if (!lr) { | |
034c6d6e LR |
1269 | REG_DBG_PRINT("Ignoring regulatory request set by %s " |
1270 | "since last_request is not set\n", | |
926a0a09 | 1271 | reg_initiator_name(initiator)); |
14b9815a | 1272 | return true; |
926a0a09 LR |
1273 | } |
1274 | ||
7db90f4a | 1275 | if (initiator == NL80211_REGDOM_SET_BY_CORE && |
a2f73b6c | 1276 | wiphy->regulatory_flags & REGULATORY_CUSTOM_REG) { |
034c6d6e LR |
1277 | REG_DBG_PRINT("Ignoring regulatory request set by %s " |
1278 | "since the driver uses its own custom " | |
1279 | "regulatory domain\n", | |
926a0a09 | 1280 | reg_initiator_name(initiator)); |
14b9815a | 1281 | return true; |
926a0a09 LR |
1282 | } |
1283 | ||
fb1fc7ad LR |
1284 | /* |
1285 | * wiphy->regd will be set once the device has its own | |
1286 | * desired regulatory domain set | |
1287 | */ | |
fa1fb9cb | 1288 | if (wiphy_strict_alpha2_regd(wiphy) && !wiphy->regd && |
749b527b | 1289 | initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && |
c492db37 | 1290 | !is_world_regdom(lr->alpha2)) { |
034c6d6e LR |
1291 | REG_DBG_PRINT("Ignoring regulatory request set by %s " |
1292 | "since the driver requires its own regulatory " | |
1293 | "domain to be set first\n", | |
926a0a09 | 1294 | reg_initiator_name(initiator)); |
14b9815a | 1295 | return true; |
926a0a09 LR |
1296 | } |
1297 | ||
c492db37 | 1298 | if (reg_request_cell_base(lr)) |
57b5ce07 LR |
1299 | return reg_dev_ignore_cell_hint(wiphy); |
1300 | ||
14b9815a LR |
1301 | return false; |
1302 | } | |
1303 | ||
3195e489 LR |
1304 | static bool reg_is_world_roaming(struct wiphy *wiphy) |
1305 | { | |
1306 | const struct ieee80211_regdomain *cr = get_cfg80211_regdom(); | |
1307 | const struct ieee80211_regdomain *wr = get_wiphy_regdom(wiphy); | |
1308 | struct regulatory_request *lr = get_last_request(); | |
1309 | ||
1310 | if (is_world_regdom(cr->alpha2) || (wr && is_world_regdom(wr->alpha2))) | |
1311 | return true; | |
1312 | ||
1313 | if (lr && lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && | |
a2f73b6c | 1314 | wiphy->regulatory_flags & REGULATORY_CUSTOM_REG) |
3195e489 LR |
1315 | return true; |
1316 | ||
1317 | return false; | |
1318 | } | |
1319 | ||
1a919318 | 1320 | static void handle_reg_beacon(struct wiphy *wiphy, unsigned int chan_idx, |
e38f8a7a LR |
1321 | struct reg_beacon *reg_beacon) |
1322 | { | |
e38f8a7a LR |
1323 | struct ieee80211_supported_band *sband; |
1324 | struct ieee80211_channel *chan; | |
6bad8766 LR |
1325 | bool channel_changed = false; |
1326 | struct ieee80211_channel chan_before; | |
e38f8a7a | 1327 | |
e38f8a7a LR |
1328 | sband = wiphy->bands[reg_beacon->chan.band]; |
1329 | chan = &sband->channels[chan_idx]; | |
1330 | ||
1331 | if (likely(chan->center_freq != reg_beacon->chan.center_freq)) | |
1332 | return; | |
1333 | ||
6bad8766 LR |
1334 | if (chan->beacon_found) |
1335 | return; | |
1336 | ||
1337 | chan->beacon_found = true; | |
1338 | ||
0f500a5f LR |
1339 | if (!reg_is_world_roaming(wiphy)) |
1340 | return; | |
1341 | ||
a2f73b6c | 1342 | if (wiphy->regulatory_flags & REGULATORY_DISABLE_BEACON_HINTS) |
37184244 LR |
1343 | return; |
1344 | ||
6bad8766 LR |
1345 | chan_before.center_freq = chan->center_freq; |
1346 | chan_before.flags = chan->flags; | |
1347 | ||
8fe02e16 LR |
1348 | if (chan->flags & IEEE80211_CHAN_NO_IR) { |
1349 | chan->flags &= ~IEEE80211_CHAN_NO_IR; | |
6bad8766 | 1350 | channel_changed = true; |
e38f8a7a LR |
1351 | } |
1352 | ||
6bad8766 LR |
1353 | if (channel_changed) |
1354 | nl80211_send_beacon_hint_event(wiphy, &chan_before, chan); | |
e38f8a7a LR |
1355 | } |
1356 | ||
1357 | /* | |
1358 | * Called when a scan on a wiphy finds a beacon on | |
1359 | * new channel | |
1360 | */ | |
1361 | static void wiphy_update_new_beacon(struct wiphy *wiphy, | |
1362 | struct reg_beacon *reg_beacon) | |
1363 | { | |
1364 | unsigned int i; | |
1365 | struct ieee80211_supported_band *sband; | |
1366 | ||
e38f8a7a LR |
1367 | if (!wiphy->bands[reg_beacon->chan.band]) |
1368 | return; | |
1369 | ||
1370 | sband = wiphy->bands[reg_beacon->chan.band]; | |
1371 | ||
1372 | for (i = 0; i < sband->n_channels; i++) | |
1373 | handle_reg_beacon(wiphy, i, reg_beacon); | |
1374 | } | |
1375 | ||
1376 | /* | |
1377 | * Called upon reg changes or a new wiphy is added | |
1378 | */ | |
1379 | static void wiphy_update_beacon_reg(struct wiphy *wiphy) | |
1380 | { | |
1381 | unsigned int i; | |
1382 | struct ieee80211_supported_band *sband; | |
1383 | struct reg_beacon *reg_beacon; | |
1384 | ||
e38f8a7a LR |
1385 | list_for_each_entry(reg_beacon, ®_beacon_list, list) { |
1386 | if (!wiphy->bands[reg_beacon->chan.band]) | |
1387 | continue; | |
1388 | sband = wiphy->bands[reg_beacon->chan.band]; | |
1389 | for (i = 0; i < sband->n_channels; i++) | |
1390 | handle_reg_beacon(wiphy, i, reg_beacon); | |
1391 | } | |
1392 | } | |
1393 | ||
e38f8a7a LR |
1394 | /* Reap the advantages of previously found beacons */ |
1395 | static void reg_process_beacons(struct wiphy *wiphy) | |
1396 | { | |
b1ed8ddd LR |
1397 | /* |
1398 | * Means we are just firing up cfg80211, so no beacons would | |
1399 | * have been processed yet. | |
1400 | */ | |
1401 | if (!last_request) | |
1402 | return; | |
e38f8a7a LR |
1403 | wiphy_update_beacon_reg(wiphy); |
1404 | } | |
1405 | ||
1a919318 | 1406 | static bool is_ht40_allowed(struct ieee80211_channel *chan) |
038659e7 LR |
1407 | { |
1408 | if (!chan) | |
1a919318 | 1409 | return false; |
038659e7 | 1410 | if (chan->flags & IEEE80211_CHAN_DISABLED) |
1a919318 | 1411 | return false; |
038659e7 | 1412 | /* This would happen when regulatory rules disallow HT40 completely */ |
55b183ad FF |
1413 | if ((chan->flags & IEEE80211_CHAN_NO_HT40) == IEEE80211_CHAN_NO_HT40) |
1414 | return false; | |
1415 | return true; | |
038659e7 LR |
1416 | } |
1417 | ||
1418 | static void reg_process_ht_flags_channel(struct wiphy *wiphy, | |
fdc9d7b2 | 1419 | struct ieee80211_channel *channel) |
038659e7 | 1420 | { |
fdc9d7b2 | 1421 | struct ieee80211_supported_band *sband = wiphy->bands[channel->band]; |
038659e7 LR |
1422 | struct ieee80211_channel *channel_before = NULL, *channel_after = NULL; |
1423 | unsigned int i; | |
1424 | ||
1a919318 | 1425 | if (!is_ht40_allowed(channel)) { |
038659e7 LR |
1426 | channel->flags |= IEEE80211_CHAN_NO_HT40; |
1427 | return; | |
1428 | } | |
1429 | ||
1430 | /* | |
1431 | * We need to ensure the extension channels exist to | |
1432 | * be able to use HT40- or HT40+, this finds them (or not) | |
1433 | */ | |
1434 | for (i = 0; i < sband->n_channels; i++) { | |
1435 | struct ieee80211_channel *c = &sband->channels[i]; | |
1a919318 | 1436 | |
038659e7 LR |
1437 | if (c->center_freq == (channel->center_freq - 20)) |
1438 | channel_before = c; | |
1439 | if (c->center_freq == (channel->center_freq + 20)) | |
1440 | channel_after = c; | |
1441 | } | |
1442 | ||
1443 | /* | |
1444 | * Please note that this assumes target bandwidth is 20 MHz, | |
1445 | * if that ever changes we also need to change the below logic | |
1446 | * to include that as well. | |
1447 | */ | |
1a919318 | 1448 | if (!is_ht40_allowed(channel_before)) |
689da1b3 | 1449 | channel->flags |= IEEE80211_CHAN_NO_HT40MINUS; |
038659e7 | 1450 | else |
689da1b3 | 1451 | channel->flags &= ~IEEE80211_CHAN_NO_HT40MINUS; |
038659e7 | 1452 | |
1a919318 | 1453 | if (!is_ht40_allowed(channel_after)) |
689da1b3 | 1454 | channel->flags |= IEEE80211_CHAN_NO_HT40PLUS; |
038659e7 | 1455 | else |
689da1b3 | 1456 | channel->flags &= ~IEEE80211_CHAN_NO_HT40PLUS; |
038659e7 LR |
1457 | } |
1458 | ||
1459 | static void reg_process_ht_flags_band(struct wiphy *wiphy, | |
fdc9d7b2 | 1460 | struct ieee80211_supported_band *sband) |
038659e7 LR |
1461 | { |
1462 | unsigned int i; | |
038659e7 | 1463 | |
fdc9d7b2 JB |
1464 | if (!sband) |
1465 | return; | |
038659e7 LR |
1466 | |
1467 | for (i = 0; i < sband->n_channels; i++) | |
fdc9d7b2 | 1468 | reg_process_ht_flags_channel(wiphy, &sband->channels[i]); |
038659e7 LR |
1469 | } |
1470 | ||
1471 | static void reg_process_ht_flags(struct wiphy *wiphy) | |
1472 | { | |
1473 | enum ieee80211_band band; | |
1474 | ||
1475 | if (!wiphy) | |
1476 | return; | |
1477 | ||
fdc9d7b2 JB |
1478 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) |
1479 | reg_process_ht_flags_band(wiphy, wiphy->bands[band]); | |
038659e7 LR |
1480 | } |
1481 | ||
0e3802db LR |
1482 | static void reg_call_notifier(struct wiphy *wiphy, |
1483 | struct regulatory_request *request) | |
1484 | { | |
1485 | if (wiphy->reg_notifier) | |
1486 | wiphy->reg_notifier(wiphy, request); | |
1487 | } | |
1488 | ||
eac03e38 SN |
1489 | static void wiphy_update_regulatory(struct wiphy *wiphy, |
1490 | enum nl80211_reg_initiator initiator) | |
b2e1b302 LR |
1491 | { |
1492 | enum ieee80211_band band; | |
c492db37 | 1493 | struct regulatory_request *lr = get_last_request(); |
eac03e38 | 1494 | |
0e3802db LR |
1495 | if (ignore_reg_update(wiphy, initiator)) { |
1496 | /* | |
1497 | * Regulatory updates set by CORE are ignored for custom | |
1498 | * regulatory cards. Let us notify the changes to the driver, | |
1499 | * as some drivers used this to restore its orig_* reg domain. | |
1500 | */ | |
1501 | if (initiator == NL80211_REGDOM_SET_BY_CORE && | |
a2f73b6c | 1502 | wiphy->regulatory_flags & REGULATORY_CUSTOM_REG) |
0e3802db | 1503 | reg_call_notifier(wiphy, lr); |
a203c2aa | 1504 | return; |
0e3802db | 1505 | } |
a203c2aa | 1506 | |
c492db37 | 1507 | lr->dfs_region = get_cfg80211_regdom()->dfs_region; |
b68e6b3b | 1508 | |
fdc9d7b2 JB |
1509 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) |
1510 | handle_band(wiphy, initiator, wiphy->bands[band]); | |
a203c2aa | 1511 | |
e38f8a7a | 1512 | reg_process_beacons(wiphy); |
038659e7 | 1513 | reg_process_ht_flags(wiphy); |
0e3802db | 1514 | reg_call_notifier(wiphy, lr); |
b2e1b302 LR |
1515 | } |
1516 | ||
d7549cbb SN |
1517 | static void update_all_wiphy_regulatory(enum nl80211_reg_initiator initiator) |
1518 | { | |
1519 | struct cfg80211_registered_device *rdev; | |
4a38994f | 1520 | struct wiphy *wiphy; |
d7549cbb | 1521 | |
5fe231e8 | 1522 | ASSERT_RTNL(); |
458f4f9e | 1523 | |
4a38994f RM |
1524 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) { |
1525 | wiphy = &rdev->wiphy; | |
1526 | wiphy_update_regulatory(wiphy, initiator); | |
4a38994f | 1527 | } |
d7549cbb SN |
1528 | } |
1529 | ||
1fa25e41 | 1530 | static void handle_channel_custom(struct wiphy *wiphy, |
fdc9d7b2 | 1531 | struct ieee80211_channel *chan, |
1fa25e41 LR |
1532 | const struct ieee80211_regdomain *regd) |
1533 | { | |
038659e7 | 1534 | u32 bw_flags = 0; |
1fa25e41 LR |
1535 | const struct ieee80211_reg_rule *reg_rule = NULL; |
1536 | const struct ieee80211_power_rule *power_rule = NULL; | |
038659e7 | 1537 | const struct ieee80211_freq_range *freq_range = NULL; |
97524820 | 1538 | u32 max_bandwidth_khz; |
ac46d48e | 1539 | |
361c9c8b JB |
1540 | reg_rule = freq_reg_info_regd(wiphy, MHZ_TO_KHZ(chan->center_freq), |
1541 | regd); | |
1fa25e41 | 1542 | |
361c9c8b | 1543 | if (IS_ERR(reg_rule)) { |
fe7ef5e9 JB |
1544 | REG_DBG_PRINT("Disabling freq %d MHz as custom regd has no rule that fits it\n", |
1545 | chan->center_freq); | |
cc493e4f LR |
1546 | chan->orig_flags |= IEEE80211_CHAN_DISABLED; |
1547 | chan->flags = chan->orig_flags; | |
1fa25e41 LR |
1548 | return; |
1549 | } | |
1550 | ||
b0dfd2ea | 1551 | chan_reg_rule_print_dbg(regd, chan, reg_rule); |
e702d3cf | 1552 | |
1fa25e41 | 1553 | power_rule = ®_rule->power_rule; |
038659e7 LR |
1554 | freq_range = ®_rule->freq_range; |
1555 | ||
97524820 JD |
1556 | max_bandwidth_khz = freq_range->max_bandwidth_khz; |
1557 | /* Check if auto calculation requested */ | |
b0dfd2ea | 1558 | if (reg_rule->flags & NL80211_RRF_AUTO_BW) |
97524820 JD |
1559 | max_bandwidth_khz = reg_get_max_bandwidth(regd, reg_rule); |
1560 | ||
1561 | if (max_bandwidth_khz < MHZ_TO_KHZ(40)) | |
e33e2241 | 1562 | bw_flags = IEEE80211_CHAN_NO_HT40; |
97524820 | 1563 | if (max_bandwidth_khz < MHZ_TO_KHZ(80)) |
c7a6ee27 | 1564 | bw_flags |= IEEE80211_CHAN_NO_80MHZ; |
97524820 | 1565 | if (max_bandwidth_khz < MHZ_TO_KHZ(160)) |
c7a6ee27 | 1566 | bw_flags |= IEEE80211_CHAN_NO_160MHZ; |
1fa25e41 | 1567 | |
038659e7 | 1568 | chan->flags |= map_regdom_flags(reg_rule->flags) | bw_flags; |
1fa25e41 | 1569 | chan->max_antenna_gain = (int) MBI_TO_DBI(power_rule->max_antenna_gain); |
279f0f55 FF |
1570 | chan->max_reg_power = chan->max_power = |
1571 | (int) MBM_TO_DBM(power_rule->max_eirp); | |
1fa25e41 LR |
1572 | } |
1573 | ||
fdc9d7b2 JB |
1574 | static void handle_band_custom(struct wiphy *wiphy, |
1575 | struct ieee80211_supported_band *sband, | |
1fa25e41 LR |
1576 | const struct ieee80211_regdomain *regd) |
1577 | { | |
1578 | unsigned int i; | |
1fa25e41 | 1579 | |
fdc9d7b2 JB |
1580 | if (!sband) |
1581 | return; | |
1fa25e41 LR |
1582 | |
1583 | for (i = 0; i < sband->n_channels; i++) | |
fdc9d7b2 | 1584 | handle_channel_custom(wiphy, &sband->channels[i], regd); |
1fa25e41 LR |
1585 | } |
1586 | ||
1587 | /* Used by drivers prior to wiphy registration */ | |
1588 | void wiphy_apply_custom_regulatory(struct wiphy *wiphy, | |
1589 | const struct ieee80211_regdomain *regd) | |
1590 | { | |
1591 | enum ieee80211_band band; | |
bbcf3f02 | 1592 | unsigned int bands_set = 0; |
ac46d48e | 1593 | |
a2f73b6c LR |
1594 | WARN(!(wiphy->regulatory_flags & REGULATORY_CUSTOM_REG), |
1595 | "wiphy should have REGULATORY_CUSTOM_REG\n"); | |
1596 | wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG; | |
222ea581 | 1597 | |
1fa25e41 | 1598 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) { |
bbcf3f02 LR |
1599 | if (!wiphy->bands[band]) |
1600 | continue; | |
fdc9d7b2 | 1601 | handle_band_custom(wiphy, wiphy->bands[band], regd); |
bbcf3f02 | 1602 | bands_set++; |
b2e1b302 | 1603 | } |
bbcf3f02 LR |
1604 | |
1605 | /* | |
1606 | * no point in calling this if it won't have any effect | |
1a919318 | 1607 | * on your device's supported bands. |
bbcf3f02 LR |
1608 | */ |
1609 | WARN_ON(!bands_set); | |
b2e1b302 | 1610 | } |
1fa25e41 LR |
1611 | EXPORT_SYMBOL(wiphy_apply_custom_regulatory); |
1612 | ||
b2e253cf LR |
1613 | static void reg_set_request_processed(void) |
1614 | { | |
1615 | bool need_more_processing = false; | |
c492db37 | 1616 | struct regulatory_request *lr = get_last_request(); |
b2e253cf | 1617 | |
c492db37 | 1618 | lr->processed = true; |
b2e253cf LR |
1619 | |
1620 | spin_lock(®_requests_lock); | |
1621 | if (!list_empty(®_requests_list)) | |
1622 | need_more_processing = true; | |
1623 | spin_unlock(®_requests_lock); | |
1624 | ||
c492db37 | 1625 | if (lr->initiator == NL80211_REGDOM_SET_BY_USER) |
fe20b39e | 1626 | cancel_delayed_work(®_timeout); |
a90c7a31 | 1627 | |
b2e253cf LR |
1628 | if (need_more_processing) |
1629 | schedule_work(®_work); | |
1630 | } | |
1631 | ||
b3eb7f3f LR |
1632 | /** |
1633 | * reg_process_hint_core - process core regulatory requests | |
1634 | * @pending_request: a pending core regulatory request | |
1635 | * | |
1636 | * The wireless subsystem can use this function to process | |
1637 | * a regulatory request issued by the regulatory core. | |
1638 | * | |
1639 | * Returns one of the different reg request treatment values. | |
1640 | */ | |
1641 | static enum reg_request_treatment | |
1642 | reg_process_hint_core(struct regulatory_request *core_request) | |
1643 | { | |
b3eb7f3f LR |
1644 | |
1645 | core_request->intersect = false; | |
1646 | core_request->processed = false; | |
5ad6ef5e | 1647 | |
05f1a3ea | 1648 | reg_update_last_request(core_request); |
b3eb7f3f | 1649 | |
fe6631ff | 1650 | return reg_call_crda(core_request); |
b3eb7f3f LR |
1651 | } |
1652 | ||
0d97a619 LR |
1653 | static enum reg_request_treatment |
1654 | __reg_process_hint_user(struct regulatory_request *user_request) | |
1655 | { | |
1656 | struct regulatory_request *lr = get_last_request(); | |
1657 | ||
52616f2b IP |
1658 | if (reg_request_indoor(user_request)) { |
1659 | reg_is_indoor = true; | |
1660 | return REG_REQ_USER_HINT_HANDLED; | |
1661 | } | |
1662 | ||
0d97a619 LR |
1663 | if (reg_request_cell_base(user_request)) |
1664 | return reg_ignore_cell_hint(user_request); | |
1665 | ||
1666 | if (reg_request_cell_base(lr)) | |
1667 | return REG_REQ_IGNORE; | |
1668 | ||
1669 | if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) | |
1670 | return REG_REQ_INTERSECT; | |
1671 | /* | |
1672 | * If the user knows better the user should set the regdom | |
1673 | * to their country before the IE is picked up | |
1674 | */ | |
1675 | if (lr->initiator == NL80211_REGDOM_SET_BY_USER && | |
1676 | lr->intersect) | |
1677 | return REG_REQ_IGNORE; | |
1678 | /* | |
1679 | * Process user requests only after previous user/driver/core | |
1680 | * requests have been processed | |
1681 | */ | |
1682 | if ((lr->initiator == NL80211_REGDOM_SET_BY_CORE || | |
1683 | lr->initiator == NL80211_REGDOM_SET_BY_DRIVER || | |
1684 | lr->initiator == NL80211_REGDOM_SET_BY_USER) && | |
1685 | regdom_changes(lr->alpha2)) | |
1686 | return REG_REQ_IGNORE; | |
1687 | ||
1688 | if (!regdom_changes(user_request->alpha2)) | |
1689 | return REG_REQ_ALREADY_SET; | |
1690 | ||
1691 | return REG_REQ_OK; | |
1692 | } | |
1693 | ||
1694 | /** | |
1695 | * reg_process_hint_user - process user regulatory requests | |
1696 | * @user_request: a pending user regulatory request | |
1697 | * | |
1698 | * The wireless subsystem can use this function to process | |
1699 | * a regulatory request initiated by userspace. | |
1700 | * | |
1701 | * Returns one of the different reg request treatment values. | |
1702 | */ | |
1703 | static enum reg_request_treatment | |
1704 | reg_process_hint_user(struct regulatory_request *user_request) | |
1705 | { | |
1706 | enum reg_request_treatment treatment; | |
0d97a619 LR |
1707 | |
1708 | treatment = __reg_process_hint_user(user_request); | |
1709 | if (treatment == REG_REQ_IGNORE || | |
52616f2b IP |
1710 | treatment == REG_REQ_ALREADY_SET || |
1711 | treatment == REG_REQ_USER_HINT_HANDLED) { | |
c888393b | 1712 | reg_free_request(user_request); |
0d97a619 LR |
1713 | return treatment; |
1714 | } | |
1715 | ||
0d97a619 LR |
1716 | user_request->intersect = treatment == REG_REQ_INTERSECT; |
1717 | user_request->processed = false; | |
5ad6ef5e | 1718 | |
05f1a3ea | 1719 | reg_update_last_request(user_request); |
0d97a619 LR |
1720 | |
1721 | user_alpha2[0] = user_request->alpha2[0]; | |
1722 | user_alpha2[1] = user_request->alpha2[1]; | |
1723 | ||
fe6631ff | 1724 | return reg_call_crda(user_request); |
0d97a619 LR |
1725 | } |
1726 | ||
21636c7f LR |
1727 | static enum reg_request_treatment |
1728 | __reg_process_hint_driver(struct regulatory_request *driver_request) | |
1729 | { | |
1730 | struct regulatory_request *lr = get_last_request(); | |
1731 | ||
1732 | if (lr->initiator == NL80211_REGDOM_SET_BY_CORE) { | |
1733 | if (regdom_changes(driver_request->alpha2)) | |
1734 | return REG_REQ_OK; | |
1735 | return REG_REQ_ALREADY_SET; | |
1736 | } | |
1737 | ||
1738 | /* | |
1739 | * This would happen if you unplug and plug your card | |
1740 | * back in or if you add a new device for which the previously | |
1741 | * loaded card also agrees on the regulatory domain. | |
1742 | */ | |
1743 | if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER && | |
1744 | !regdom_changes(driver_request->alpha2)) | |
1745 | return REG_REQ_ALREADY_SET; | |
1746 | ||
1747 | return REG_REQ_INTERSECT; | |
1748 | } | |
1749 | ||
1750 | /** | |
1751 | * reg_process_hint_driver - process driver regulatory requests | |
1752 | * @driver_request: a pending driver regulatory request | |
1753 | * | |
1754 | * The wireless subsystem can use this function to process | |
1755 | * a regulatory request issued by an 802.11 driver. | |
1756 | * | |
1757 | * Returns one of the different reg request treatment values. | |
1758 | */ | |
1759 | static enum reg_request_treatment | |
1760 | reg_process_hint_driver(struct wiphy *wiphy, | |
1761 | struct regulatory_request *driver_request) | |
1762 | { | |
1763 | const struct ieee80211_regdomain *regd; | |
1764 | enum reg_request_treatment treatment; | |
21636c7f LR |
1765 | |
1766 | treatment = __reg_process_hint_driver(driver_request); | |
1767 | ||
1768 | switch (treatment) { | |
1769 | case REG_REQ_OK: | |
1770 | break; | |
1771 | case REG_REQ_IGNORE: | |
52616f2b | 1772 | case REG_REQ_USER_HINT_HANDLED: |
c888393b | 1773 | reg_free_request(driver_request); |
21636c7f LR |
1774 | return treatment; |
1775 | case REG_REQ_INTERSECT: | |
1776 | /* fall through */ | |
1777 | case REG_REQ_ALREADY_SET: | |
1778 | regd = reg_copy_regd(get_cfg80211_regdom()); | |
1779 | if (IS_ERR(regd)) { | |
c888393b | 1780 | reg_free_request(driver_request); |
21636c7f LR |
1781 | return REG_REQ_IGNORE; |
1782 | } | |
1783 | rcu_assign_pointer(wiphy->regd, regd); | |
1784 | } | |
1785 | ||
21636c7f LR |
1786 | |
1787 | driver_request->intersect = treatment == REG_REQ_INTERSECT; | |
1788 | driver_request->processed = false; | |
5ad6ef5e | 1789 | |
05f1a3ea | 1790 | reg_update_last_request(driver_request); |
21636c7f LR |
1791 | |
1792 | /* | |
1793 | * Since CRDA will not be called in this case as we already | |
1794 | * have applied the requested regulatory domain before we just | |
1795 | * inform userspace we have processed the request | |
1796 | */ | |
1797 | if (treatment == REG_REQ_ALREADY_SET) { | |
1798 | nl80211_send_reg_change_event(driver_request); | |
1799 | reg_set_request_processed(); | |
1800 | return treatment; | |
1801 | } | |
1802 | ||
fe6631ff | 1803 | return reg_call_crda(driver_request); |
21636c7f LR |
1804 | } |
1805 | ||
b23e7a9e LR |
1806 | static enum reg_request_treatment |
1807 | __reg_process_hint_country_ie(struct wiphy *wiphy, | |
1808 | struct regulatory_request *country_ie_request) | |
1809 | { | |
1810 | struct wiphy *last_wiphy = NULL; | |
1811 | struct regulatory_request *lr = get_last_request(); | |
1812 | ||
1813 | if (reg_request_cell_base(lr)) { | |
1814 | /* Trust a Cell base station over the AP's country IE */ | |
1815 | if (regdom_changes(country_ie_request->alpha2)) | |
1816 | return REG_REQ_IGNORE; | |
1817 | return REG_REQ_ALREADY_SET; | |
2a901468 LR |
1818 | } else { |
1819 | if (wiphy->regulatory_flags & REGULATORY_COUNTRY_IE_IGNORE) | |
1820 | return REG_REQ_IGNORE; | |
b23e7a9e LR |
1821 | } |
1822 | ||
b23e7a9e LR |
1823 | if (unlikely(!is_an_alpha2(country_ie_request->alpha2))) |
1824 | return -EINVAL; | |
2f1c6c57 LR |
1825 | |
1826 | if (lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE) | |
1827 | return REG_REQ_OK; | |
1828 | ||
1829 | last_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx); | |
1830 | ||
1831 | if (last_wiphy != wiphy) { | |
b23e7a9e | 1832 | /* |
2f1c6c57 LR |
1833 | * Two cards with two APs claiming different |
1834 | * Country IE alpha2s. We could | |
1835 | * intersect them, but that seems unlikely | |
1836 | * to be correct. Reject second one for now. | |
b23e7a9e | 1837 | */ |
2f1c6c57 LR |
1838 | if (regdom_changes(country_ie_request->alpha2)) |
1839 | return REG_REQ_IGNORE; | |
b23e7a9e LR |
1840 | return REG_REQ_ALREADY_SET; |
1841 | } | |
2f1c6c57 LR |
1842 | /* |
1843 | * Two consecutive Country IE hints on the same wiphy. | |
1844 | * This should be picked up early by the driver/stack | |
1845 | */ | |
1846 | if (WARN_ON(regdom_changes(country_ie_request->alpha2))) | |
1847 | return REG_REQ_OK; | |
1848 | return REG_REQ_ALREADY_SET; | |
b23e7a9e LR |
1849 | } |
1850 | ||
d1c96a9a | 1851 | /** |
b23e7a9e LR |
1852 | * reg_process_hint_country_ie - process regulatory requests from country IEs |
1853 | * @country_ie_request: a regulatory request from a country IE | |
d1c96a9a | 1854 | * |
b23e7a9e LR |
1855 | * The wireless subsystem can use this function to process |
1856 | * a regulatory request issued by a country Information Element. | |
d1c96a9a | 1857 | * |
2f92212b | 1858 | * Returns one of the different reg request treatment values. |
d1c96a9a | 1859 | */ |
2f92212b | 1860 | static enum reg_request_treatment |
b23e7a9e LR |
1861 | reg_process_hint_country_ie(struct wiphy *wiphy, |
1862 | struct regulatory_request *country_ie_request) | |
b2e1b302 | 1863 | { |
2f92212b | 1864 | enum reg_request_treatment treatment; |
761cf7ec | 1865 | |
b23e7a9e | 1866 | treatment = __reg_process_hint_country_ie(wiphy, country_ie_request); |
9c96477d | 1867 | |
2f92212b | 1868 | switch (treatment) { |
2f92212b JB |
1869 | case REG_REQ_OK: |
1870 | break; | |
b23e7a9e | 1871 | case REG_REQ_IGNORE: |
52616f2b | 1872 | case REG_REQ_USER_HINT_HANDLED: |
b23e7a9e LR |
1873 | /* fall through */ |
1874 | case REG_REQ_ALREADY_SET: | |
c888393b | 1875 | reg_free_request(country_ie_request); |
b23e7a9e LR |
1876 | return treatment; |
1877 | case REG_REQ_INTERSECT: | |
c888393b | 1878 | reg_free_request(country_ie_request); |
fb1fc7ad | 1879 | /* |
b23e7a9e LR |
1880 | * This doesn't happen yet, not sure we |
1881 | * ever want to support it for this case. | |
fb1fc7ad | 1882 | */ |
b23e7a9e LR |
1883 | WARN_ONCE(1, "Unexpected intersection for country IEs"); |
1884 | return REG_REQ_IGNORE; | |
3e0c3ff3 | 1885 | } |
b2e1b302 | 1886 | |
b23e7a9e LR |
1887 | country_ie_request->intersect = false; |
1888 | country_ie_request->processed = false; | |
5ad6ef5e | 1889 | |
05f1a3ea | 1890 | reg_update_last_request(country_ie_request); |
3e0c3ff3 | 1891 | |
fe6631ff | 1892 | return reg_call_crda(country_ie_request); |
b2e1b302 LR |
1893 | } |
1894 | ||
30a548c7 | 1895 | /* This processes *all* regulatory hints */ |
1daa37c7 | 1896 | static void reg_process_hint(struct regulatory_request *reg_request) |
fe33eb39 | 1897 | { |
fe33eb39 | 1898 | struct wiphy *wiphy = NULL; |
b3eb7f3f | 1899 | enum reg_request_treatment treatment; |
fe33eb39 | 1900 | |
f4173766 | 1901 | if (reg_request->wiphy_idx != WIPHY_IDX_INVALID) |
fe33eb39 LR |
1902 | wiphy = wiphy_idx_to_wiphy(reg_request->wiphy_idx); |
1903 | ||
b3eb7f3f LR |
1904 | switch (reg_request->initiator) { |
1905 | case NL80211_REGDOM_SET_BY_CORE: | |
1906 | reg_process_hint_core(reg_request); | |
1907 | return; | |
1908 | case NL80211_REGDOM_SET_BY_USER: | |
0d97a619 | 1909 | treatment = reg_process_hint_user(reg_request); |
50c11eb9 | 1910 | if (treatment == REG_REQ_IGNORE || |
4d3df547 AN |
1911 | treatment == REG_REQ_ALREADY_SET || |
1912 | treatment == REG_REQ_USER_HINT_HANDLED) | |
0d97a619 | 1913 | return; |
845f3351 SD |
1914 | queue_delayed_work(system_power_efficient_wq, |
1915 | ®_timeout, msecs_to_jiffies(3142)); | |
0d97a619 | 1916 | return; |
b3eb7f3f | 1917 | case NL80211_REGDOM_SET_BY_DRIVER: |
772f0389 IP |
1918 | if (!wiphy) |
1919 | goto out_free; | |
21636c7f LR |
1920 | treatment = reg_process_hint_driver(wiphy, reg_request); |
1921 | break; | |
b3eb7f3f | 1922 | case NL80211_REGDOM_SET_BY_COUNTRY_IE: |
772f0389 IP |
1923 | if (!wiphy) |
1924 | goto out_free; | |
b23e7a9e | 1925 | treatment = reg_process_hint_country_ie(wiphy, reg_request); |
b3eb7f3f LR |
1926 | break; |
1927 | default: | |
1928 | WARN(1, "invalid initiator %d\n", reg_request->initiator); | |
772f0389 | 1929 | goto out_free; |
b3eb7f3f LR |
1930 | } |
1931 | ||
b23e7a9e LR |
1932 | /* This is required so that the orig_* parameters are saved */ |
1933 | if (treatment == REG_REQ_ALREADY_SET && wiphy && | |
a2f73b6c | 1934 | wiphy->regulatory_flags & REGULATORY_STRICT_REG) |
b23e7a9e | 1935 | wiphy_update_regulatory(wiphy, reg_request->initiator); |
772f0389 IP |
1936 | |
1937 | return; | |
1938 | ||
1939 | out_free: | |
c888393b | 1940 | reg_free_request(reg_request); |
fe33eb39 LR |
1941 | } |
1942 | ||
b2e253cf LR |
1943 | /* |
1944 | * Processes regulatory hints, this is all the NL80211_REGDOM_SET_BY_* | |
1945 | * Regulatory hints come on a first come first serve basis and we | |
1946 | * must process each one atomically. | |
1947 | */ | |
fe33eb39 | 1948 | static void reg_process_pending_hints(void) |
b0e2880b | 1949 | { |
c492db37 | 1950 | struct regulatory_request *reg_request, *lr; |
fe33eb39 | 1951 | |
c492db37 | 1952 | lr = get_last_request(); |
b0e2880b | 1953 | |
b2e253cf | 1954 | /* When last_request->processed becomes true this will be rescheduled */ |
c492db37 | 1955 | if (lr && !lr->processed) { |
96cce12f | 1956 | reg_process_hint(lr); |
5fe231e8 | 1957 | return; |
b2e253cf LR |
1958 | } |
1959 | ||
fe33eb39 | 1960 | spin_lock(®_requests_lock); |
fe33eb39 | 1961 | |
b2e253cf | 1962 | if (list_empty(®_requests_list)) { |
d951c1dd | 1963 | spin_unlock(®_requests_lock); |
5fe231e8 | 1964 | return; |
fe33eb39 | 1965 | } |
b2e253cf LR |
1966 | |
1967 | reg_request = list_first_entry(®_requests_list, | |
1968 | struct regulatory_request, | |
1969 | list); | |
1970 | list_del_init(®_request->list); | |
1971 | ||
fe33eb39 | 1972 | spin_unlock(®_requests_lock); |
b0e2880b | 1973 | |
1daa37c7 | 1974 | reg_process_hint(reg_request); |
fe33eb39 LR |
1975 | } |
1976 | ||
e38f8a7a LR |
1977 | /* Processes beacon hints -- this has nothing to do with country IEs */ |
1978 | static void reg_process_pending_beacon_hints(void) | |
1979 | { | |
79c97e97 | 1980 | struct cfg80211_registered_device *rdev; |
e38f8a7a LR |
1981 | struct reg_beacon *pending_beacon, *tmp; |
1982 | ||
e38f8a7a LR |
1983 | /* This goes through the _pending_ beacon list */ |
1984 | spin_lock_bh(®_pending_beacons_lock); | |
1985 | ||
e38f8a7a LR |
1986 | list_for_each_entry_safe(pending_beacon, tmp, |
1987 | ®_pending_beacons, list) { | |
e38f8a7a LR |
1988 | list_del_init(&pending_beacon->list); |
1989 | ||
1990 | /* Applies the beacon hint to current wiphys */ | |
79c97e97 JB |
1991 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) |
1992 | wiphy_update_new_beacon(&rdev->wiphy, pending_beacon); | |
e38f8a7a LR |
1993 | |
1994 | /* Remembers the beacon hint for new wiphys or reg changes */ | |
1995 | list_add_tail(&pending_beacon->list, ®_beacon_list); | |
1996 | } | |
1997 | ||
1998 | spin_unlock_bh(®_pending_beacons_lock); | |
e38f8a7a LR |
1999 | } |
2000 | ||
fe33eb39 LR |
2001 | static void reg_todo(struct work_struct *work) |
2002 | { | |
5fe231e8 | 2003 | rtnl_lock(); |
fe33eb39 | 2004 | reg_process_pending_hints(); |
e38f8a7a | 2005 | reg_process_pending_beacon_hints(); |
5fe231e8 | 2006 | rtnl_unlock(); |
fe33eb39 LR |
2007 | } |
2008 | ||
fe33eb39 LR |
2009 | static void queue_regulatory_request(struct regulatory_request *request) |
2010 | { | |
d4f2c881 JB |
2011 | request->alpha2[0] = toupper(request->alpha2[0]); |
2012 | request->alpha2[1] = toupper(request->alpha2[1]); | |
c61029c7 | 2013 | |
fe33eb39 LR |
2014 | spin_lock(®_requests_lock); |
2015 | list_add_tail(&request->list, ®_requests_list); | |
2016 | spin_unlock(®_requests_lock); | |
2017 | ||
2018 | schedule_work(®_work); | |
2019 | } | |
2020 | ||
09d989d1 LR |
2021 | /* |
2022 | * Core regulatory hint -- happens during cfg80211_init() | |
2023 | * and when we restore regulatory settings. | |
2024 | */ | |
ba25c141 LR |
2025 | static int regulatory_hint_core(const char *alpha2) |
2026 | { | |
2027 | struct regulatory_request *request; | |
2028 | ||
1a919318 | 2029 | request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); |
ba25c141 LR |
2030 | if (!request) |
2031 | return -ENOMEM; | |
2032 | ||
2033 | request->alpha2[0] = alpha2[0]; | |
2034 | request->alpha2[1] = alpha2[1]; | |
7db90f4a | 2035 | request->initiator = NL80211_REGDOM_SET_BY_CORE; |
ba25c141 | 2036 | |
31e99729 | 2037 | queue_regulatory_request(request); |
5078b2e3 | 2038 | |
fe33eb39 | 2039 | return 0; |
ba25c141 LR |
2040 | } |
2041 | ||
fe33eb39 | 2042 | /* User hints */ |
57b5ce07 LR |
2043 | int regulatory_hint_user(const char *alpha2, |
2044 | enum nl80211_user_reg_hint_type user_reg_hint_type) | |
b2e1b302 | 2045 | { |
fe33eb39 LR |
2046 | struct regulatory_request *request; |
2047 | ||
fdc9d7b2 JB |
2048 | if (WARN_ON(!alpha2)) |
2049 | return -EINVAL; | |
b2e1b302 | 2050 | |
fe33eb39 LR |
2051 | request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); |
2052 | if (!request) | |
2053 | return -ENOMEM; | |
2054 | ||
f4173766 | 2055 | request->wiphy_idx = WIPHY_IDX_INVALID; |
fe33eb39 LR |
2056 | request->alpha2[0] = alpha2[0]; |
2057 | request->alpha2[1] = alpha2[1]; | |
e12822e1 | 2058 | request->initiator = NL80211_REGDOM_SET_BY_USER; |
57b5ce07 | 2059 | request->user_reg_hint_type = user_reg_hint_type; |
fe33eb39 LR |
2060 | |
2061 | queue_regulatory_request(request); | |
2062 | ||
2063 | return 0; | |
2064 | } | |
2065 | ||
52616f2b IP |
2066 | int regulatory_hint_indoor_user(void) |
2067 | { | |
2068 | struct regulatory_request *request; | |
2069 | ||
2070 | request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); | |
2071 | if (!request) | |
2072 | return -ENOMEM; | |
2073 | ||
2074 | request->wiphy_idx = WIPHY_IDX_INVALID; | |
2075 | request->initiator = NL80211_REGDOM_SET_BY_USER; | |
2076 | request->user_reg_hint_type = NL80211_USER_REG_HINT_INDOOR; | |
2077 | queue_regulatory_request(request); | |
2078 | ||
2079 | return 0; | |
2080 | } | |
2081 | ||
fe33eb39 LR |
2082 | /* Driver hints */ |
2083 | int regulatory_hint(struct wiphy *wiphy, const char *alpha2) | |
2084 | { | |
2085 | struct regulatory_request *request; | |
2086 | ||
fdc9d7b2 JB |
2087 | if (WARN_ON(!alpha2 || !wiphy)) |
2088 | return -EINVAL; | |
fe33eb39 | 2089 | |
4f7b9140 LR |
2090 | wiphy->regulatory_flags &= ~REGULATORY_CUSTOM_REG; |
2091 | ||
fe33eb39 LR |
2092 | request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); |
2093 | if (!request) | |
2094 | return -ENOMEM; | |
2095 | ||
2096 | request->wiphy_idx = get_wiphy_idx(wiphy); | |
2097 | ||
fe33eb39 LR |
2098 | request->alpha2[0] = alpha2[0]; |
2099 | request->alpha2[1] = alpha2[1]; | |
7db90f4a | 2100 | request->initiator = NL80211_REGDOM_SET_BY_DRIVER; |
fe33eb39 LR |
2101 | |
2102 | queue_regulatory_request(request); | |
2103 | ||
2104 | return 0; | |
b2e1b302 LR |
2105 | } |
2106 | EXPORT_SYMBOL(regulatory_hint); | |
2107 | ||
789fd033 LR |
2108 | void regulatory_hint_country_ie(struct wiphy *wiphy, enum ieee80211_band band, |
2109 | const u8 *country_ie, u8 country_ie_len) | |
3f2355cb | 2110 | { |
3f2355cb | 2111 | char alpha2[2]; |
3f2355cb | 2112 | enum environment_cap env = ENVIRON_ANY; |
db2424c5 | 2113 | struct regulatory_request *request = NULL, *lr; |
d335fe63 | 2114 | |
3f2355cb LR |
2115 | /* IE len must be evenly divisible by 2 */ |
2116 | if (country_ie_len & 0x01) | |
db2424c5 | 2117 | return; |
3f2355cb LR |
2118 | |
2119 | if (country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN) | |
db2424c5 JB |
2120 | return; |
2121 | ||
2122 | request = kzalloc(sizeof(*request), GFP_KERNEL); | |
2123 | if (!request) | |
2124 | return; | |
3f2355cb | 2125 | |
3f2355cb LR |
2126 | alpha2[0] = country_ie[0]; |
2127 | alpha2[1] = country_ie[1]; | |
2128 | ||
2129 | if (country_ie[2] == 'I') | |
2130 | env = ENVIRON_INDOOR; | |
2131 | else if (country_ie[2] == 'O') | |
2132 | env = ENVIRON_OUTDOOR; | |
2133 | ||
db2424c5 JB |
2134 | rcu_read_lock(); |
2135 | lr = get_last_request(); | |
2136 | ||
2137 | if (unlikely(!lr)) | |
2138 | goto out; | |
2139 | ||
fb1fc7ad | 2140 | /* |
8b19e6ca | 2141 | * We will run this only upon a successful connection on cfg80211. |
4b44c8bc | 2142 | * We leave conflict resolution to the workqueue, where can hold |
5fe231e8 | 2143 | * the RTNL. |
fb1fc7ad | 2144 | */ |
c492db37 JB |
2145 | if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE && |
2146 | lr->wiphy_idx != WIPHY_IDX_INVALID) | |
4b44c8bc | 2147 | goto out; |
3f2355cb | 2148 | |
fe33eb39 | 2149 | request->wiphy_idx = get_wiphy_idx(wiphy); |
4f366c5d JL |
2150 | request->alpha2[0] = alpha2[0]; |
2151 | request->alpha2[1] = alpha2[1]; | |
7db90f4a | 2152 | request->initiator = NL80211_REGDOM_SET_BY_COUNTRY_IE; |
fe33eb39 LR |
2153 | request->country_ie_env = env; |
2154 | ||
fe33eb39 | 2155 | queue_regulatory_request(request); |
db2424c5 | 2156 | request = NULL; |
3f2355cb | 2157 | out: |
db2424c5 JB |
2158 | kfree(request); |
2159 | rcu_read_unlock(); | |
3f2355cb | 2160 | } |
b2e1b302 | 2161 | |
09d989d1 LR |
2162 | static void restore_alpha2(char *alpha2, bool reset_user) |
2163 | { | |
2164 | /* indicates there is no alpha2 to consider for restoration */ | |
2165 | alpha2[0] = '9'; | |
2166 | alpha2[1] = '7'; | |
2167 | ||
2168 | /* The user setting has precedence over the module parameter */ | |
2169 | if (is_user_regdom_saved()) { | |
2170 | /* Unless we're asked to ignore it and reset it */ | |
2171 | if (reset_user) { | |
1a919318 | 2172 | REG_DBG_PRINT("Restoring regulatory settings including user preference\n"); |
09d989d1 LR |
2173 | user_alpha2[0] = '9'; |
2174 | user_alpha2[1] = '7'; | |
2175 | ||
2176 | /* | |
2177 | * If we're ignoring user settings, we still need to | |
2178 | * check the module parameter to ensure we put things | |
2179 | * back as they were for a full restore. | |
2180 | */ | |
2181 | if (!is_world_regdom(ieee80211_regdom)) { | |
1a919318 JB |
2182 | REG_DBG_PRINT("Keeping preference on module parameter ieee80211_regdom: %c%c\n", |
2183 | ieee80211_regdom[0], ieee80211_regdom[1]); | |
09d989d1 LR |
2184 | alpha2[0] = ieee80211_regdom[0]; |
2185 | alpha2[1] = ieee80211_regdom[1]; | |
2186 | } | |
2187 | } else { | |
1a919318 JB |
2188 | REG_DBG_PRINT("Restoring regulatory settings while preserving user preference for: %c%c\n", |
2189 | user_alpha2[0], user_alpha2[1]); | |
09d989d1 LR |
2190 | alpha2[0] = user_alpha2[0]; |
2191 | alpha2[1] = user_alpha2[1]; | |
2192 | } | |
2193 | } else if (!is_world_regdom(ieee80211_regdom)) { | |
1a919318 JB |
2194 | REG_DBG_PRINT("Keeping preference on module parameter ieee80211_regdom: %c%c\n", |
2195 | ieee80211_regdom[0], ieee80211_regdom[1]); | |
09d989d1 LR |
2196 | alpha2[0] = ieee80211_regdom[0]; |
2197 | alpha2[1] = ieee80211_regdom[1]; | |
2198 | } else | |
d91e41b6 | 2199 | REG_DBG_PRINT("Restoring regulatory settings\n"); |
09d989d1 LR |
2200 | } |
2201 | ||
5ce543d1 RM |
2202 | static void restore_custom_reg_settings(struct wiphy *wiphy) |
2203 | { | |
2204 | struct ieee80211_supported_band *sband; | |
2205 | enum ieee80211_band band; | |
2206 | struct ieee80211_channel *chan; | |
2207 | int i; | |
2208 | ||
2209 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) { | |
2210 | sband = wiphy->bands[band]; | |
2211 | if (!sband) | |
2212 | continue; | |
2213 | for (i = 0; i < sband->n_channels; i++) { | |
2214 | chan = &sband->channels[i]; | |
2215 | chan->flags = chan->orig_flags; | |
2216 | chan->max_antenna_gain = chan->orig_mag; | |
2217 | chan->max_power = chan->orig_mpwr; | |
899852af | 2218 | chan->beacon_found = false; |
5ce543d1 RM |
2219 | } |
2220 | } | |
2221 | } | |
2222 | ||
09d989d1 LR |
2223 | /* |
2224 | * Restoring regulatory settings involves ingoring any | |
2225 | * possibly stale country IE information and user regulatory | |
2226 | * settings if so desired, this includes any beacon hints | |
2227 | * learned as we could have traveled outside to another country | |
2228 | * after disconnection. To restore regulatory settings we do | |
2229 | * exactly what we did at bootup: | |
2230 | * | |
2231 | * - send a core regulatory hint | |
2232 | * - send a user regulatory hint if applicable | |
2233 | * | |
2234 | * Device drivers that send a regulatory hint for a specific country | |
2235 | * keep their own regulatory domain on wiphy->regd so that does does | |
2236 | * not need to be remembered. | |
2237 | */ | |
2238 | static void restore_regulatory_settings(bool reset_user) | |
2239 | { | |
2240 | char alpha2[2]; | |
cee0bec5 | 2241 | char world_alpha2[2]; |
09d989d1 | 2242 | struct reg_beacon *reg_beacon, *btmp; |
14609555 LR |
2243 | struct regulatory_request *reg_request, *tmp; |
2244 | LIST_HEAD(tmp_reg_req_list); | |
5ce543d1 | 2245 | struct cfg80211_registered_device *rdev; |
09d989d1 | 2246 | |
5fe231e8 JB |
2247 | ASSERT_RTNL(); |
2248 | ||
52616f2b IP |
2249 | reg_is_indoor = false; |
2250 | ||
2d319867 | 2251 | reset_regdomains(true, &world_regdom); |
09d989d1 LR |
2252 | restore_alpha2(alpha2, reset_user); |
2253 | ||
14609555 LR |
2254 | /* |
2255 | * If there's any pending requests we simply | |
2256 | * stash them to a temporary pending queue and | |
2257 | * add then after we've restored regulatory | |
2258 | * settings. | |
2259 | */ | |
2260 | spin_lock(®_requests_lock); | |
fea9bced JB |
2261 | list_for_each_entry_safe(reg_request, tmp, ®_requests_list, list) { |
2262 | if (reg_request->initiator != NL80211_REGDOM_SET_BY_USER) | |
2263 | continue; | |
2264 | list_move_tail(®_request->list, &tmp_reg_req_list); | |
14609555 LR |
2265 | } |
2266 | spin_unlock(®_requests_lock); | |
2267 | ||
09d989d1 LR |
2268 | /* Clear beacon hints */ |
2269 | spin_lock_bh(®_pending_beacons_lock); | |
fea9bced JB |
2270 | list_for_each_entry_safe(reg_beacon, btmp, ®_pending_beacons, list) { |
2271 | list_del(®_beacon->list); | |
2272 | kfree(reg_beacon); | |
09d989d1 LR |
2273 | } |
2274 | spin_unlock_bh(®_pending_beacons_lock); | |
2275 | ||
fea9bced JB |
2276 | list_for_each_entry_safe(reg_beacon, btmp, ®_beacon_list, list) { |
2277 | list_del(®_beacon->list); | |
2278 | kfree(reg_beacon); | |
09d989d1 LR |
2279 | } |
2280 | ||
2281 | /* First restore to the basic regulatory settings */ | |
379b82f4 JB |
2282 | world_alpha2[0] = cfg80211_world_regdom->alpha2[0]; |
2283 | world_alpha2[1] = cfg80211_world_regdom->alpha2[1]; | |
09d989d1 | 2284 | |
5ce543d1 | 2285 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) { |
a2f73b6c | 2286 | if (rdev->wiphy.regulatory_flags & REGULATORY_CUSTOM_REG) |
5ce543d1 RM |
2287 | restore_custom_reg_settings(&rdev->wiphy); |
2288 | } | |
2289 | ||
cee0bec5 | 2290 | regulatory_hint_core(world_alpha2); |
09d989d1 LR |
2291 | |
2292 | /* | |
2293 | * This restores the ieee80211_regdom module parameter | |
2294 | * preference or the last user requested regulatory | |
2295 | * settings, user regulatory settings takes precedence. | |
2296 | */ | |
2297 | if (is_an_alpha2(alpha2)) | |
57b5ce07 | 2298 | regulatory_hint_user(user_alpha2, NL80211_USER_REG_HINT_USER); |
09d989d1 | 2299 | |
14609555 | 2300 | spin_lock(®_requests_lock); |
11cff96c | 2301 | list_splice_tail_init(&tmp_reg_req_list, ®_requests_list); |
14609555 LR |
2302 | spin_unlock(®_requests_lock); |
2303 | ||
14609555 LR |
2304 | REG_DBG_PRINT("Kicking the queue\n"); |
2305 | ||
2306 | schedule_work(®_work); | |
2307 | } | |
09d989d1 LR |
2308 | |
2309 | void regulatory_hint_disconnect(void) | |
2310 | { | |
1a919318 | 2311 | REG_DBG_PRINT("All devices are disconnected, going to restore regulatory settings\n"); |
09d989d1 LR |
2312 | restore_regulatory_settings(false); |
2313 | } | |
2314 | ||
e38f8a7a LR |
2315 | static bool freq_is_chan_12_13_14(u16 freq) |
2316 | { | |
59eb21a6 BR |
2317 | if (freq == ieee80211_channel_to_frequency(12, IEEE80211_BAND_2GHZ) || |
2318 | freq == ieee80211_channel_to_frequency(13, IEEE80211_BAND_2GHZ) || | |
2319 | freq == ieee80211_channel_to_frequency(14, IEEE80211_BAND_2GHZ)) | |
e38f8a7a LR |
2320 | return true; |
2321 | return false; | |
2322 | } | |
2323 | ||
3ebfa6e7 LR |
2324 | static bool pending_reg_beacon(struct ieee80211_channel *beacon_chan) |
2325 | { | |
2326 | struct reg_beacon *pending_beacon; | |
2327 | ||
2328 | list_for_each_entry(pending_beacon, ®_pending_beacons, list) | |
2329 | if (beacon_chan->center_freq == | |
2330 | pending_beacon->chan.center_freq) | |
2331 | return true; | |
2332 | return false; | |
2333 | } | |
2334 | ||
e38f8a7a LR |
2335 | int regulatory_hint_found_beacon(struct wiphy *wiphy, |
2336 | struct ieee80211_channel *beacon_chan, | |
2337 | gfp_t gfp) | |
2338 | { | |
2339 | struct reg_beacon *reg_beacon; | |
3ebfa6e7 | 2340 | bool processing; |
e38f8a7a | 2341 | |
1a919318 JB |
2342 | if (beacon_chan->beacon_found || |
2343 | beacon_chan->flags & IEEE80211_CHAN_RADAR || | |
e38f8a7a | 2344 | (beacon_chan->band == IEEE80211_BAND_2GHZ && |
1a919318 | 2345 | !freq_is_chan_12_13_14(beacon_chan->center_freq))) |
e38f8a7a LR |
2346 | return 0; |
2347 | ||
3ebfa6e7 LR |
2348 | spin_lock_bh(®_pending_beacons_lock); |
2349 | processing = pending_reg_beacon(beacon_chan); | |
2350 | spin_unlock_bh(®_pending_beacons_lock); | |
2351 | ||
2352 | if (processing) | |
e38f8a7a LR |
2353 | return 0; |
2354 | ||
2355 | reg_beacon = kzalloc(sizeof(struct reg_beacon), gfp); | |
2356 | if (!reg_beacon) | |
2357 | return -ENOMEM; | |
2358 | ||
1a919318 | 2359 | REG_DBG_PRINT("Found new beacon on frequency: %d MHz (Ch %d) on %s\n", |
4113f751 LR |
2360 | beacon_chan->center_freq, |
2361 | ieee80211_frequency_to_channel(beacon_chan->center_freq), | |
2362 | wiphy_name(wiphy)); | |
2363 | ||
e38f8a7a | 2364 | memcpy(®_beacon->chan, beacon_chan, |
1a919318 | 2365 | sizeof(struct ieee80211_channel)); |
e38f8a7a LR |
2366 | |
2367 | /* | |
2368 | * Since we can be called from BH or and non-BH context | |
2369 | * we must use spin_lock_bh() | |
2370 | */ | |
2371 | spin_lock_bh(®_pending_beacons_lock); | |
2372 | list_add_tail(®_beacon->list, ®_pending_beacons); | |
2373 | spin_unlock_bh(®_pending_beacons_lock); | |
2374 | ||
2375 | schedule_work(®_work); | |
2376 | ||
2377 | return 0; | |
2378 | } | |
2379 | ||
a3d2eaf0 | 2380 | static void print_rd_rules(const struct ieee80211_regdomain *rd) |
b2e1b302 LR |
2381 | { |
2382 | unsigned int i; | |
a3d2eaf0 JB |
2383 | const struct ieee80211_reg_rule *reg_rule = NULL; |
2384 | const struct ieee80211_freq_range *freq_range = NULL; | |
2385 | const struct ieee80211_power_rule *power_rule = NULL; | |
089027e5 | 2386 | char bw[32], cac_time[32]; |
b2e1b302 | 2387 | |
089027e5 | 2388 | pr_info(" (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp), (dfs_cac_time)\n"); |
b2e1b302 LR |
2389 | |
2390 | for (i = 0; i < rd->n_reg_rules; i++) { | |
2391 | reg_rule = &rd->reg_rules[i]; | |
2392 | freq_range = ®_rule->freq_range; | |
2393 | power_rule = ®_rule->power_rule; | |
2394 | ||
b0dfd2ea JD |
2395 | if (reg_rule->flags & NL80211_RRF_AUTO_BW) |
2396 | snprintf(bw, sizeof(bw), "%d KHz, %d KHz AUTO", | |
2397 | freq_range->max_bandwidth_khz, | |
97524820 JD |
2398 | reg_get_max_bandwidth(rd, reg_rule)); |
2399 | else | |
b0dfd2ea | 2400 | snprintf(bw, sizeof(bw), "%d KHz", |
97524820 JD |
2401 | freq_range->max_bandwidth_khz); |
2402 | ||
089027e5 JD |
2403 | if (reg_rule->flags & NL80211_RRF_DFS) |
2404 | scnprintf(cac_time, sizeof(cac_time), "%u s", | |
2405 | reg_rule->dfs_cac_ms/1000); | |
2406 | else | |
2407 | scnprintf(cac_time, sizeof(cac_time), "N/A"); | |
2408 | ||
2409 | ||
fb1fc7ad LR |
2410 | /* |
2411 | * There may not be documentation for max antenna gain | |
2412 | * in certain regions | |
2413 | */ | |
b2e1b302 | 2414 | if (power_rule->max_antenna_gain) |
089027e5 | 2415 | pr_info(" (%d KHz - %d KHz @ %s), (%d mBi, %d mBm), (%s)\n", |
b2e1b302 LR |
2416 | freq_range->start_freq_khz, |
2417 | freq_range->end_freq_khz, | |
97524820 | 2418 | bw, |
b2e1b302 | 2419 | power_rule->max_antenna_gain, |
089027e5 JD |
2420 | power_rule->max_eirp, |
2421 | cac_time); | |
b2e1b302 | 2422 | else |
089027e5 | 2423 | pr_info(" (%d KHz - %d KHz @ %s), (N/A, %d mBm), (%s)\n", |
b2e1b302 LR |
2424 | freq_range->start_freq_khz, |
2425 | freq_range->end_freq_khz, | |
97524820 | 2426 | bw, |
089027e5 JD |
2427 | power_rule->max_eirp, |
2428 | cac_time); | |
b2e1b302 LR |
2429 | } |
2430 | } | |
2431 | ||
4c7d3982 | 2432 | bool reg_supported_dfs_region(enum nl80211_dfs_regions dfs_region) |
8b60b078 LR |
2433 | { |
2434 | switch (dfs_region) { | |
2435 | case NL80211_DFS_UNSET: | |
2436 | case NL80211_DFS_FCC: | |
2437 | case NL80211_DFS_ETSI: | |
2438 | case NL80211_DFS_JP: | |
2439 | return true; | |
2440 | default: | |
2441 | REG_DBG_PRINT("Ignoring uknown DFS master region: %d\n", | |
2442 | dfs_region); | |
2443 | return false; | |
2444 | } | |
2445 | } | |
2446 | ||
a3d2eaf0 | 2447 | static void print_regdomain(const struct ieee80211_regdomain *rd) |
b2e1b302 | 2448 | { |
c492db37 | 2449 | struct regulatory_request *lr = get_last_request(); |
b2e1b302 | 2450 | |
3f2355cb | 2451 | if (is_intersected_alpha2(rd->alpha2)) { |
c492db37 | 2452 | if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) { |
79c97e97 | 2453 | struct cfg80211_registered_device *rdev; |
c492db37 | 2454 | rdev = cfg80211_rdev_by_wiphy_idx(lr->wiphy_idx); |
79c97e97 | 2455 | if (rdev) { |
e9c0268f | 2456 | pr_info("Current regulatory domain updated by AP to: %c%c\n", |
79c97e97 JB |
2457 | rdev->country_ie_alpha2[0], |
2458 | rdev->country_ie_alpha2[1]); | |
3f2355cb | 2459 | } else |
e9c0268f | 2460 | pr_info("Current regulatory domain intersected:\n"); |
3f2355cb | 2461 | } else |
e9c0268f | 2462 | pr_info("Current regulatory domain intersected:\n"); |
1a919318 | 2463 | } else if (is_world_regdom(rd->alpha2)) { |
e9c0268f | 2464 | pr_info("World regulatory domain updated:\n"); |
1a919318 | 2465 | } else { |
b2e1b302 | 2466 | if (is_unknown_alpha2(rd->alpha2)) |
e9c0268f | 2467 | pr_info("Regulatory domain changed to driver built-in settings (unknown country)\n"); |
57b5ce07 | 2468 | else { |
c492db37 | 2469 | if (reg_request_cell_base(lr)) |
1a919318 | 2470 | pr_info("Regulatory domain changed to country: %c%c by Cell Station\n", |
57b5ce07 LR |
2471 | rd->alpha2[0], rd->alpha2[1]); |
2472 | else | |
1a919318 | 2473 | pr_info("Regulatory domain changed to country: %c%c\n", |
57b5ce07 LR |
2474 | rd->alpha2[0], rd->alpha2[1]); |
2475 | } | |
b2e1b302 | 2476 | } |
1a919318 | 2477 | |
3ef121b5 | 2478 | pr_info(" DFS Master region: %s", reg_dfs_region_str(rd->dfs_region)); |
b2e1b302 LR |
2479 | print_rd_rules(rd); |
2480 | } | |
2481 | ||
2df78167 | 2482 | static void print_regdomain_info(const struct ieee80211_regdomain *rd) |
b2e1b302 | 2483 | { |
e9c0268f | 2484 | pr_info("Regulatory domain: %c%c\n", rd->alpha2[0], rd->alpha2[1]); |
b2e1b302 LR |
2485 | print_rd_rules(rd); |
2486 | } | |
2487 | ||
3b9e5aca LR |
2488 | static int reg_set_rd_core(const struct ieee80211_regdomain *rd) |
2489 | { | |
2490 | if (!is_world_regdom(rd->alpha2)) | |
2491 | return -EINVAL; | |
2492 | update_world_regdomain(rd); | |
2493 | return 0; | |
2494 | } | |
2495 | ||
84721d44 LR |
2496 | static int reg_set_rd_user(const struct ieee80211_regdomain *rd, |
2497 | struct regulatory_request *user_request) | |
2498 | { | |
2499 | const struct ieee80211_regdomain *intersected_rd = NULL; | |
2500 | ||
84721d44 LR |
2501 | if (!regdom_changes(rd->alpha2)) |
2502 | return -EALREADY; | |
2503 | ||
2504 | if (!is_valid_rd(rd)) { | |
2505 | pr_err("Invalid regulatory domain detected:\n"); | |
2506 | print_regdomain_info(rd); | |
2507 | return -EINVAL; | |
2508 | } | |
2509 | ||
2510 | if (!user_request->intersect) { | |
2511 | reset_regdomains(false, rd); | |
2512 | return 0; | |
2513 | } | |
2514 | ||
2515 | intersected_rd = regdom_intersect(rd, get_cfg80211_regdom()); | |
2516 | if (!intersected_rd) | |
2517 | return -EINVAL; | |
2518 | ||
2519 | kfree(rd); | |
2520 | rd = NULL; | |
2521 | reset_regdomains(false, intersected_rd); | |
2522 | ||
2523 | return 0; | |
2524 | } | |
2525 | ||
f5fe3247 LR |
2526 | static int reg_set_rd_driver(const struct ieee80211_regdomain *rd, |
2527 | struct regulatory_request *driver_request) | |
b2e1b302 | 2528 | { |
e9763c3c | 2529 | const struct ieee80211_regdomain *regd; |
9c96477d | 2530 | const struct ieee80211_regdomain *intersected_rd = NULL; |
f5fe3247 | 2531 | const struct ieee80211_regdomain *tmp; |
806a9e39 | 2532 | struct wiphy *request_wiphy; |
6913b49a | 2533 | |
f5fe3247 | 2534 | if (is_world_regdom(rd->alpha2)) |
b2e1b302 LR |
2535 | return -EINVAL; |
2536 | ||
f5fe3247 LR |
2537 | if (!regdom_changes(rd->alpha2)) |
2538 | return -EALREADY; | |
b2e1b302 | 2539 | |
8375af3b | 2540 | if (!is_valid_rd(rd)) { |
e9c0268f | 2541 | pr_err("Invalid regulatory domain detected:\n"); |
8375af3b LR |
2542 | print_regdomain_info(rd); |
2543 | return -EINVAL; | |
b2e1b302 LR |
2544 | } |
2545 | ||
f5fe3247 LR |
2546 | request_wiphy = wiphy_idx_to_wiphy(driver_request->wiphy_idx); |
2547 | if (!request_wiphy) { | |
845f3351 SD |
2548 | queue_delayed_work(system_power_efficient_wq, |
2549 | ®_timeout, 0); | |
de3584bd JB |
2550 | return -ENODEV; |
2551 | } | |
806a9e39 | 2552 | |
f5fe3247 | 2553 | if (!driver_request->intersect) { |
558f6d32 LR |
2554 | if (request_wiphy->regd) |
2555 | return -EALREADY; | |
3e0c3ff3 | 2556 | |
e9763c3c JB |
2557 | regd = reg_copy_regd(rd); |
2558 | if (IS_ERR(regd)) | |
2559 | return PTR_ERR(regd); | |
3e0c3ff3 | 2560 | |
458f4f9e | 2561 | rcu_assign_pointer(request_wiphy->regd, regd); |
379b82f4 | 2562 | reset_regdomains(false, rd); |
b8295acd LR |
2563 | return 0; |
2564 | } | |
2565 | ||
f5fe3247 LR |
2566 | intersected_rd = regdom_intersect(rd, get_cfg80211_regdom()); |
2567 | if (!intersected_rd) | |
2568 | return -EINVAL; | |
b8295acd | 2569 | |
f5fe3247 LR |
2570 | /* |
2571 | * We can trash what CRDA provided now. | |
2572 | * However if a driver requested this specific regulatory | |
2573 | * domain we keep it for its private use | |
2574 | */ | |
2575 | tmp = get_wiphy_regdom(request_wiphy); | |
2576 | rcu_assign_pointer(request_wiphy->regd, rd); | |
2577 | rcu_free_regdom(tmp); | |
b8295acd | 2578 | |
f5fe3247 | 2579 | rd = NULL; |
b7566fc3 | 2580 | |
f5fe3247 | 2581 | reset_regdomains(false, intersected_rd); |
3e0c3ff3 | 2582 | |
f5fe3247 LR |
2583 | return 0; |
2584 | } | |
2585 | ||
01992406 LR |
2586 | static int reg_set_rd_country_ie(const struct ieee80211_regdomain *rd, |
2587 | struct regulatory_request *country_ie_request) | |
f5fe3247 LR |
2588 | { |
2589 | struct wiphy *request_wiphy; | |
b8295acd | 2590 | |
f5fe3247 LR |
2591 | if (!is_alpha2_set(rd->alpha2) && !is_an_alpha2(rd->alpha2) && |
2592 | !is_unknown_alpha2(rd->alpha2)) | |
2593 | return -EINVAL; | |
b8295acd | 2594 | |
f5fe3247 LR |
2595 | /* |
2596 | * Lets only bother proceeding on the same alpha2 if the current | |
2597 | * rd is non static (it means CRDA was present and was used last) | |
2598 | * and the pending request came in from a country IE | |
2599 | */ | |
2600 | ||
2601 | if (!is_valid_rd(rd)) { | |
2602 | pr_err("Invalid regulatory domain detected:\n"); | |
2603 | print_regdomain_info(rd); | |
2604 | return -EINVAL; | |
9c96477d LR |
2605 | } |
2606 | ||
01992406 | 2607 | request_wiphy = wiphy_idx_to_wiphy(country_ie_request->wiphy_idx); |
f5fe3247 | 2608 | if (!request_wiphy) { |
845f3351 SD |
2609 | queue_delayed_work(system_power_efficient_wq, |
2610 | ®_timeout, 0); | |
f5fe3247 LR |
2611 | return -ENODEV; |
2612 | } | |
b2e1b302 | 2613 | |
01992406 | 2614 | if (country_ie_request->intersect) |
f5fe3247 LR |
2615 | return -EINVAL; |
2616 | ||
2617 | reset_regdomains(false, rd); | |
2618 | return 0; | |
2619 | } | |
b2e1b302 | 2620 | |
fb1fc7ad LR |
2621 | /* |
2622 | * Use this call to set the current regulatory domain. Conflicts with | |
b2e1b302 | 2623 | * multiple drivers can be ironed out later. Caller must've already |
458f4f9e | 2624 | * kmalloc'd the rd structure. |
fb1fc7ad | 2625 | */ |
a3d2eaf0 | 2626 | int set_regdom(const struct ieee80211_regdomain *rd) |
b2e1b302 | 2627 | { |
c492db37 | 2628 | struct regulatory_request *lr; |
092008ab | 2629 | bool user_reset = false; |
b2e1b302 LR |
2630 | int r; |
2631 | ||
3b9e5aca LR |
2632 | if (!reg_is_valid_request(rd->alpha2)) { |
2633 | kfree(rd); | |
2634 | return -EINVAL; | |
2635 | } | |
2636 | ||
c492db37 | 2637 | lr = get_last_request(); |
abc7381b | 2638 | |
b2e1b302 | 2639 | /* Note that this doesn't update the wiphys, this is done below */ |
3b9e5aca LR |
2640 | switch (lr->initiator) { |
2641 | case NL80211_REGDOM_SET_BY_CORE: | |
2642 | r = reg_set_rd_core(rd); | |
2643 | break; | |
2644 | case NL80211_REGDOM_SET_BY_USER: | |
84721d44 | 2645 | r = reg_set_rd_user(rd, lr); |
092008ab | 2646 | user_reset = true; |
84721d44 | 2647 | break; |
3b9e5aca | 2648 | case NL80211_REGDOM_SET_BY_DRIVER: |
f5fe3247 LR |
2649 | r = reg_set_rd_driver(rd, lr); |
2650 | break; | |
3b9e5aca | 2651 | case NL80211_REGDOM_SET_BY_COUNTRY_IE: |
01992406 | 2652 | r = reg_set_rd_country_ie(rd, lr); |
3b9e5aca LR |
2653 | break; |
2654 | default: | |
2655 | WARN(1, "invalid initiator %d\n", lr->initiator); | |
2656 | return -EINVAL; | |
2657 | } | |
2658 | ||
d2372b31 | 2659 | if (r) { |
092008ab JD |
2660 | switch (r) { |
2661 | case -EALREADY: | |
95908535 | 2662 | reg_set_request_processed(); |
092008ab JD |
2663 | break; |
2664 | default: | |
2665 | /* Back to world regulatory in case of errors */ | |
2666 | restore_regulatory_settings(user_reset); | |
2667 | } | |
95908535 | 2668 | |
d2372b31 | 2669 | kfree(rd); |
38fd2143 | 2670 | return r; |
d2372b31 | 2671 | } |
b2e1b302 | 2672 | |
b2e1b302 | 2673 | /* This would make this whole thing pointless */ |
38fd2143 JB |
2674 | if (WARN_ON(!lr->intersect && rd != get_cfg80211_regdom())) |
2675 | return -EINVAL; | |
b2e1b302 LR |
2676 | |
2677 | /* update all wiphys now with the new established regulatory domain */ | |
c492db37 | 2678 | update_all_wiphy_regulatory(lr->initiator); |
b2e1b302 | 2679 | |
458f4f9e | 2680 | print_regdomain(get_cfg80211_regdom()); |
b2e1b302 | 2681 | |
c492db37 | 2682 | nl80211_send_reg_change_event(lr); |
73d54c9e | 2683 | |
b2e253cf LR |
2684 | reg_set_request_processed(); |
2685 | ||
38fd2143 | 2686 | return 0; |
b2e1b302 LR |
2687 | } |
2688 | ||
57b5ce07 LR |
2689 | void wiphy_regulatory_register(struct wiphy *wiphy) |
2690 | { | |
23df0b73 AN |
2691 | struct regulatory_request *lr; |
2692 | ||
57b5ce07 LR |
2693 | if (!reg_dev_ignore_cell_hint(wiphy)) |
2694 | reg_num_devs_support_basehint++; | |
2695 | ||
23df0b73 AN |
2696 | lr = get_last_request(); |
2697 | wiphy_update_regulatory(wiphy, lr->initiator); | |
57b5ce07 LR |
2698 | } |
2699 | ||
bfead080 | 2700 | void wiphy_regulatory_deregister(struct wiphy *wiphy) |
3f2355cb | 2701 | { |
0ad8acaf | 2702 | struct wiphy *request_wiphy = NULL; |
c492db37 | 2703 | struct regulatory_request *lr; |
761cf7ec | 2704 | |
c492db37 | 2705 | lr = get_last_request(); |
abc7381b | 2706 | |
57b5ce07 LR |
2707 | if (!reg_dev_ignore_cell_hint(wiphy)) |
2708 | reg_num_devs_support_basehint--; | |
2709 | ||
458f4f9e | 2710 | rcu_free_regdom(get_wiphy_regdom(wiphy)); |
34dd886c | 2711 | RCU_INIT_POINTER(wiphy->regd, NULL); |
0ef9ccdd | 2712 | |
c492db37 JB |
2713 | if (lr) |
2714 | request_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx); | |
806a9e39 | 2715 | |
0ef9ccdd | 2716 | if (!request_wiphy || request_wiphy != wiphy) |
38fd2143 | 2717 | return; |
0ef9ccdd | 2718 | |
c492db37 JB |
2719 | lr->wiphy_idx = WIPHY_IDX_INVALID; |
2720 | lr->country_ie_env = ENVIRON_ANY; | |
3f2355cb LR |
2721 | } |
2722 | ||
a90c7a31 LR |
2723 | static void reg_timeout_work(struct work_struct *work) |
2724 | { | |
1a919318 | 2725 | REG_DBG_PRINT("Timeout while waiting for CRDA to reply, restoring regulatory settings\n"); |
f77b86d7 | 2726 | rtnl_lock(); |
a90c7a31 | 2727 | restore_regulatory_settings(true); |
f77b86d7 | 2728 | rtnl_unlock(); |
a90c7a31 LR |
2729 | } |
2730 | ||
174e0cd2 IP |
2731 | /* |
2732 | * See http://www.fcc.gov/document/5-ghz-unlicensed-spectrum-unii, for | |
2733 | * UNII band definitions | |
2734 | */ | |
2735 | int cfg80211_get_unii(int freq) | |
2736 | { | |
2737 | /* UNII-1 */ | |
2738 | if (freq >= 5150 && freq <= 5250) | |
2739 | return 0; | |
2740 | ||
2741 | /* UNII-2A */ | |
2742 | if (freq > 5250 && freq <= 5350) | |
2743 | return 1; | |
2744 | ||
2745 | /* UNII-2B */ | |
2746 | if (freq > 5350 && freq <= 5470) | |
2747 | return 2; | |
2748 | ||
2749 | /* UNII-2C */ | |
2750 | if (freq > 5470 && freq <= 5725) | |
2751 | return 3; | |
2752 | ||
2753 | /* UNII-3 */ | |
2754 | if (freq > 5725 && freq <= 5825) | |
2755 | return 4; | |
2756 | ||
2757 | return -EINVAL; | |
2758 | } | |
2759 | ||
c8866e55 IP |
2760 | bool regulatory_indoor_allowed(void) |
2761 | { | |
2762 | return reg_is_indoor; | |
2763 | } | |
2764 | ||
2fcc9f73 | 2765 | int __init regulatory_init(void) |
b2e1b302 | 2766 | { |
bcf4f99b | 2767 | int err = 0; |
734366de | 2768 | |
b2e1b302 LR |
2769 | reg_pdev = platform_device_register_simple("regulatory", 0, NULL, 0); |
2770 | if (IS_ERR(reg_pdev)) | |
2771 | return PTR_ERR(reg_pdev); | |
734366de | 2772 | |
fe33eb39 | 2773 | spin_lock_init(®_requests_lock); |
e38f8a7a | 2774 | spin_lock_init(®_pending_beacons_lock); |
fe33eb39 | 2775 | |
80007efe LR |
2776 | reg_regdb_size_check(); |
2777 | ||
458f4f9e | 2778 | rcu_assign_pointer(cfg80211_regdomain, cfg80211_world_regdom); |
734366de | 2779 | |
09d989d1 LR |
2780 | user_alpha2[0] = '9'; |
2781 | user_alpha2[1] = '7'; | |
2782 | ||
ae9e4b0d | 2783 | /* We always try to get an update for the static regdomain */ |
458f4f9e | 2784 | err = regulatory_hint_core(cfg80211_world_regdom->alpha2); |
ba25c141 | 2785 | if (err) { |
bcf4f99b LR |
2786 | if (err == -ENOMEM) |
2787 | return err; | |
2788 | /* | |
2789 | * N.B. kobject_uevent_env() can fail mainly for when we're out | |
2790 | * memory which is handled and propagated appropriately above | |
2791 | * but it can also fail during a netlink_broadcast() or during | |
2792 | * early boot for call_usermodehelper(). For now treat these | |
2793 | * errors as non-fatal. | |
2794 | */ | |
e9c0268f | 2795 | pr_err("kobject_uevent_env() was unable to call CRDA during init\n"); |
bcf4f99b | 2796 | } |
734366de | 2797 | |
ae9e4b0d LR |
2798 | /* |
2799 | * Finally, if the user set the module parameter treat it | |
2800 | * as a user hint. | |
2801 | */ | |
2802 | if (!is_world_regdom(ieee80211_regdom)) | |
57b5ce07 LR |
2803 | regulatory_hint_user(ieee80211_regdom, |
2804 | NL80211_USER_REG_HINT_USER); | |
ae9e4b0d | 2805 | |
b2e1b302 LR |
2806 | return 0; |
2807 | } | |
2808 | ||
1a919318 | 2809 | void regulatory_exit(void) |
b2e1b302 | 2810 | { |
fe33eb39 | 2811 | struct regulatory_request *reg_request, *tmp; |
e38f8a7a | 2812 | struct reg_beacon *reg_beacon, *btmp; |
fe33eb39 LR |
2813 | |
2814 | cancel_work_sync(®_work); | |
a90c7a31 | 2815 | cancel_delayed_work_sync(®_timeout); |
fe33eb39 | 2816 | |
9027b149 | 2817 | /* Lock to suppress warnings */ |
38fd2143 | 2818 | rtnl_lock(); |
379b82f4 | 2819 | reset_regdomains(true, NULL); |
38fd2143 | 2820 | rtnl_unlock(); |
734366de | 2821 | |
58ebacc6 | 2822 | dev_set_uevent_suppress(®_pdev->dev, true); |
f6037d09 | 2823 | |
b2e1b302 | 2824 | platform_device_unregister(reg_pdev); |
734366de | 2825 | |
fea9bced JB |
2826 | list_for_each_entry_safe(reg_beacon, btmp, ®_pending_beacons, list) { |
2827 | list_del(®_beacon->list); | |
2828 | kfree(reg_beacon); | |
e38f8a7a | 2829 | } |
e38f8a7a | 2830 | |
fea9bced JB |
2831 | list_for_each_entry_safe(reg_beacon, btmp, ®_beacon_list, list) { |
2832 | list_del(®_beacon->list); | |
2833 | kfree(reg_beacon); | |
e38f8a7a LR |
2834 | } |
2835 | ||
fea9bced JB |
2836 | list_for_each_entry_safe(reg_request, tmp, ®_requests_list, list) { |
2837 | list_del(®_request->list); | |
2838 | kfree(reg_request); | |
fe33eb39 | 2839 | } |
8318d78a | 2840 | } |