Commit | Line | Data |
---|---|---|
8318d78a JB |
1 | /* |
2 | * Copyright 2002-2005, Instant802 Networks, Inc. | |
3 | * Copyright 2005-2006, Devicescape Software, Inc. | |
4 | * Copyright 2007 Johannes Berg <johannes@sipsolutions.net> | |
3b77d5ec | 5 | * Copyright 2008-2011 Luis R. Rodriguez <mcgrof@qca.qualcomm.com> |
8318d78a | 6 | * |
3b77d5ec LR |
7 | * Permission to use, copy, modify, and/or distribute this software for any |
8 | * purpose with or without fee is hereby granted, provided that the above | |
9 | * copyright notice and this permission notice appear in all copies. | |
10 | * | |
11 | * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES | |
12 | * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF | |
13 | * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR | |
14 | * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES | |
15 | * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN | |
16 | * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF | |
17 | * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. | |
8318d78a JB |
18 | */ |
19 | ||
3b77d5ec | 20 | |
b2e1b302 LR |
21 | /** |
22 | * DOC: Wireless regulatory infrastructure | |
8318d78a JB |
23 | * |
24 | * The usual implementation is for a driver to read a device EEPROM to | |
25 | * determine which regulatory domain it should be operating under, then | |
26 | * looking up the allowable channels in a driver-local table and finally | |
27 | * registering those channels in the wiphy structure. | |
28 | * | |
b2e1b302 LR |
29 | * Another set of compliance enforcement is for drivers to use their |
30 | * own compliance limits which can be stored on the EEPROM. The host | |
31 | * driver or firmware may ensure these are used. | |
32 | * | |
33 | * In addition to all this we provide an extra layer of regulatory | |
34 | * conformance. For drivers which do not have any regulatory | |
35 | * information CRDA provides the complete regulatory solution. | |
36 | * For others it provides a community effort on further restrictions | |
37 | * to enhance compliance. | |
38 | * | |
39 | * Note: When number of rules --> infinity we will not be able to | |
40 | * index on alpha2 any more, instead we'll probably have to | |
41 | * rely on some SHA1 checksum of the regdomain for example. | |
42 | * | |
8318d78a | 43 | */ |
e9c0268f JP |
44 | |
45 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt | |
46 | ||
8318d78a | 47 | #include <linux/kernel.h> |
bc3b2d7f | 48 | #include <linux/export.h> |
5a0e3ad6 | 49 | #include <linux/slab.h> |
b2e1b302 | 50 | #include <linux/list.h> |
c61029c7 | 51 | #include <linux/ctype.h> |
b2e1b302 LR |
52 | #include <linux/nl80211.h> |
53 | #include <linux/platform_device.h> | |
d9b93842 | 54 | #include <linux/moduleparam.h> |
b2e1b302 | 55 | #include <net/cfg80211.h> |
8318d78a | 56 | #include "core.h" |
b2e1b302 | 57 | #include "reg.h" |
3b377ea9 | 58 | #include "regdb.h" |
73d54c9e | 59 | #include "nl80211.h" |
8318d78a | 60 | |
4113f751 | 61 | #ifdef CONFIG_CFG80211_REG_DEBUG |
12c5ffb5 JP |
62 | #define REG_DBG_PRINT(format, args...) \ |
63 | printk(KERN_DEBUG pr_fmt(format), ##args) | |
4113f751 | 64 | #else |
8271195e | 65 | #define REG_DBG_PRINT(args...) |
4113f751 LR |
66 | #endif |
67 | ||
2f92212b JB |
68 | enum reg_request_treatment { |
69 | REG_REQ_OK, | |
70 | REG_REQ_IGNORE, | |
71 | REG_REQ_INTERSECT, | |
72 | REG_REQ_ALREADY_SET, | |
73 | }; | |
74 | ||
a042994d LR |
75 | static struct regulatory_request core_request_world = { |
76 | .initiator = NL80211_REGDOM_SET_BY_CORE, | |
77 | .alpha2[0] = '0', | |
78 | .alpha2[1] = '0', | |
79 | .intersect = false, | |
80 | .processed = true, | |
81 | .country_ie_env = ENVIRON_ANY, | |
82 | }; | |
83 | ||
5166ccd2 | 84 | /* Receipt of information from last regulatory request */ |
a042994d | 85 | static struct regulatory_request *last_request = &core_request_world; |
734366de | 86 | |
b2e1b302 LR |
87 | /* To trigger userspace events */ |
88 | static struct platform_device *reg_pdev; | |
8318d78a | 89 | |
4d9d88d1 SJR |
90 | static struct device_type reg_device_type = { |
91 | .uevent = reg_device_uevent, | |
92 | }; | |
93 | ||
fb1fc7ad LR |
94 | /* |
95 | * Central wireless core regulatory domains, we only need two, | |
734366de | 96 | * the current one and a world regulatory domain in case we have no |
e8da2bb4 JB |
97 | * information to give us an alpha2. |
98 | * Protected by the cfg80211_mutex. | |
fb1fc7ad | 99 | */ |
f130347c | 100 | const struct ieee80211_regdomain *cfg80211_regdomain; |
734366de | 101 | |
abc7381b LR |
102 | /* |
103 | * Protects static reg.c components: | |
104 | * - cfg80211_world_regdom | |
abc7381b | 105 | * - last_request |
57b5ce07 | 106 | * - reg_num_devs_support_basehint |
abc7381b | 107 | */ |
670b7f11 | 108 | static DEFINE_MUTEX(reg_mutex); |
46a5ebaf | 109 | |
57b5ce07 LR |
110 | /* |
111 | * Number of devices that registered to the core | |
112 | * that support cellular base station regulatory hints | |
113 | */ | |
114 | static int reg_num_devs_support_basehint; | |
115 | ||
46a5ebaf JB |
116 | static inline void assert_reg_lock(void) |
117 | { | |
118 | lockdep_assert_held(®_mutex); | |
119 | } | |
abc7381b | 120 | |
e38f8a7a | 121 | /* Used to queue up regulatory hints */ |
fe33eb39 LR |
122 | static LIST_HEAD(reg_requests_list); |
123 | static spinlock_t reg_requests_lock; | |
124 | ||
e38f8a7a LR |
125 | /* Used to queue up beacon hints for review */ |
126 | static LIST_HEAD(reg_pending_beacons); | |
127 | static spinlock_t reg_pending_beacons_lock; | |
128 | ||
129 | /* Used to keep track of processed beacon hints */ | |
130 | static LIST_HEAD(reg_beacon_list); | |
131 | ||
132 | struct reg_beacon { | |
133 | struct list_head list; | |
134 | struct ieee80211_channel chan; | |
135 | }; | |
136 | ||
f333a7a2 LR |
137 | static void reg_todo(struct work_struct *work); |
138 | static DECLARE_WORK(reg_work, reg_todo); | |
139 | ||
a90c7a31 LR |
140 | static void reg_timeout_work(struct work_struct *work); |
141 | static DECLARE_DELAYED_WORK(reg_timeout, reg_timeout_work); | |
142 | ||
734366de JB |
143 | /* We keep a static world regulatory domain in case of the absence of CRDA */ |
144 | static const struct ieee80211_regdomain world_regdom = { | |
90cdc6df | 145 | .n_reg_rules = 6, |
734366de JB |
146 | .alpha2 = "00", |
147 | .reg_rules = { | |
68798a62 LR |
148 | /* IEEE 802.11b/g, channels 1..11 */ |
149 | REG_RULE(2412-10, 2462+10, 40, 6, 20, 0), | |
43c771a1 JB |
150 | /* IEEE 802.11b/g, channels 12..13. */ |
151 | REG_RULE(2467-10, 2472+10, 40, 6, 20, | |
3fc71f77 LR |
152 | NL80211_RRF_PASSIVE_SCAN | |
153 | NL80211_RRF_NO_IBSS), | |
611b6a82 LR |
154 | /* IEEE 802.11 channel 14 - Only JP enables |
155 | * this and for 802.11b only */ | |
156 | REG_RULE(2484-10, 2484+10, 20, 6, 20, | |
157 | NL80211_RRF_PASSIVE_SCAN | | |
158 | NL80211_RRF_NO_IBSS | | |
159 | NL80211_RRF_NO_OFDM), | |
160 | /* IEEE 802.11a, channel 36..48 */ | |
ec329ace | 161 | REG_RULE(5180-10, 5240+10, 40, 6, 20, |
611b6a82 LR |
162 | NL80211_RRF_PASSIVE_SCAN | |
163 | NL80211_RRF_NO_IBSS), | |
3fc71f77 LR |
164 | |
165 | /* NB: 5260 MHz - 5700 MHz requies DFS */ | |
166 | ||
167 | /* IEEE 802.11a, channel 149..165 */ | |
ec329ace | 168 | REG_RULE(5745-10, 5825+10, 40, 6, 20, |
3fc71f77 LR |
169 | NL80211_RRF_PASSIVE_SCAN | |
170 | NL80211_RRF_NO_IBSS), | |
90cdc6df VK |
171 | |
172 | /* IEEE 802.11ad (60gHz), channels 1..3 */ | |
173 | REG_RULE(56160+2160*1-1080, 56160+2160*3+1080, 2160, 0, 0, 0), | |
734366de JB |
174 | } |
175 | }; | |
176 | ||
a3d2eaf0 JB |
177 | static const struct ieee80211_regdomain *cfg80211_world_regdom = |
178 | &world_regdom; | |
734366de | 179 | |
6ee7d330 | 180 | static char *ieee80211_regdom = "00"; |
09d989d1 | 181 | static char user_alpha2[2]; |
6ee7d330 | 182 | |
734366de JB |
183 | module_param(ieee80211_regdom, charp, 0444); |
184 | MODULE_PARM_DESC(ieee80211_regdom, "IEEE 802.11 regulatory domain code"); | |
185 | ||
a042994d | 186 | static void reset_regdomains(bool full_reset) |
734366de | 187 | { |
e8da2bb4 JB |
188 | assert_cfg80211_lock(); |
189 | assert_reg_lock(); | |
190 | ||
942b25cf JB |
191 | /* avoid freeing static information or freeing something twice */ |
192 | if (cfg80211_regdomain == cfg80211_world_regdom) | |
193 | cfg80211_regdomain = NULL; | |
194 | if (cfg80211_world_regdom == &world_regdom) | |
195 | cfg80211_world_regdom = NULL; | |
196 | if (cfg80211_regdomain == &world_regdom) | |
197 | cfg80211_regdomain = NULL; | |
942b25cf JB |
198 | |
199 | kfree(cfg80211_regdomain); | |
200 | kfree(cfg80211_world_regdom); | |
734366de | 201 | |
a3d2eaf0 | 202 | cfg80211_world_regdom = &world_regdom; |
734366de | 203 | cfg80211_regdomain = NULL; |
a042994d LR |
204 | |
205 | if (!full_reset) | |
206 | return; | |
207 | ||
208 | if (last_request != &core_request_world) | |
209 | kfree(last_request); | |
210 | last_request = &core_request_world; | |
734366de JB |
211 | } |
212 | ||
fb1fc7ad LR |
213 | /* |
214 | * Dynamic world regulatory domain requested by the wireless | |
215 | * core upon initialization | |
216 | */ | |
a3d2eaf0 | 217 | static void update_world_regdomain(const struct ieee80211_regdomain *rd) |
734366de | 218 | { |
fdc9d7b2 | 219 | WARN_ON(!last_request); |
734366de | 220 | |
e8da2bb4 JB |
221 | assert_cfg80211_lock(); |
222 | assert_reg_lock(); | |
223 | ||
a042994d | 224 | reset_regdomains(false); |
734366de JB |
225 | |
226 | cfg80211_world_regdom = rd; | |
227 | cfg80211_regdomain = rd; | |
228 | } | |
734366de | 229 | |
a3d2eaf0 | 230 | bool is_world_regdom(const char *alpha2) |
b2e1b302 LR |
231 | { |
232 | if (!alpha2) | |
233 | return false; | |
1a919318 | 234 | return alpha2[0] == '0' && alpha2[1] == '0'; |
b2e1b302 | 235 | } |
8318d78a | 236 | |
a3d2eaf0 | 237 | static bool is_alpha2_set(const char *alpha2) |
b2e1b302 LR |
238 | { |
239 | if (!alpha2) | |
240 | return false; | |
1a919318 | 241 | return alpha2[0] && alpha2[1]; |
b2e1b302 | 242 | } |
8318d78a | 243 | |
a3d2eaf0 | 244 | static bool is_unknown_alpha2(const char *alpha2) |
b2e1b302 LR |
245 | { |
246 | if (!alpha2) | |
247 | return false; | |
fb1fc7ad LR |
248 | /* |
249 | * Special case where regulatory domain was built by driver | |
250 | * but a specific alpha2 cannot be determined | |
251 | */ | |
1a919318 | 252 | return alpha2[0] == '9' && alpha2[1] == '9'; |
b2e1b302 | 253 | } |
8318d78a | 254 | |
3f2355cb LR |
255 | static bool is_intersected_alpha2(const char *alpha2) |
256 | { | |
257 | if (!alpha2) | |
258 | return false; | |
fb1fc7ad LR |
259 | /* |
260 | * Special case where regulatory domain is the | |
3f2355cb | 261 | * result of an intersection between two regulatory domain |
fb1fc7ad LR |
262 | * structures |
263 | */ | |
1a919318 | 264 | return alpha2[0] == '9' && alpha2[1] == '8'; |
3f2355cb LR |
265 | } |
266 | ||
a3d2eaf0 | 267 | static bool is_an_alpha2(const char *alpha2) |
b2e1b302 LR |
268 | { |
269 | if (!alpha2) | |
270 | return false; | |
1a919318 | 271 | return isalpha(alpha2[0]) && isalpha(alpha2[1]); |
b2e1b302 | 272 | } |
8318d78a | 273 | |
a3d2eaf0 | 274 | static bool alpha2_equal(const char *alpha2_x, const char *alpha2_y) |
b2e1b302 LR |
275 | { |
276 | if (!alpha2_x || !alpha2_y) | |
277 | return false; | |
1a919318 | 278 | return alpha2_x[0] == alpha2_y[0] && alpha2_x[1] == alpha2_y[1]; |
b2e1b302 LR |
279 | } |
280 | ||
69b1572b | 281 | static bool regdom_changes(const char *alpha2) |
b2e1b302 | 282 | { |
761cf7ec LR |
283 | assert_cfg80211_lock(); |
284 | ||
b2e1b302 LR |
285 | if (!cfg80211_regdomain) |
286 | return true; | |
1a919318 | 287 | return !alpha2_equal(cfg80211_regdomain->alpha2, alpha2); |
b2e1b302 LR |
288 | } |
289 | ||
09d989d1 LR |
290 | /* |
291 | * The NL80211_REGDOM_SET_BY_USER regdom alpha2 is cached, this lets | |
292 | * you know if a valid regulatory hint with NL80211_REGDOM_SET_BY_USER | |
293 | * has ever been issued. | |
294 | */ | |
295 | static bool is_user_regdom_saved(void) | |
296 | { | |
297 | if (user_alpha2[0] == '9' && user_alpha2[1] == '7') | |
298 | return false; | |
299 | ||
300 | /* This would indicate a mistake on the design */ | |
1a919318 | 301 | if (WARN(!is_world_regdom(user_alpha2) && !is_an_alpha2(user_alpha2), |
09d989d1 | 302 | "Unexpected user alpha2: %c%c\n", |
1a919318 | 303 | user_alpha2[0], user_alpha2[1])) |
09d989d1 LR |
304 | return false; |
305 | ||
306 | return true; | |
307 | } | |
308 | ||
e9763c3c JB |
309 | static const struct ieee80211_regdomain * |
310 | reg_copy_regd(const struct ieee80211_regdomain *src_regd) | |
3b377ea9 JL |
311 | { |
312 | struct ieee80211_regdomain *regd; | |
e9763c3c | 313 | int size_of_regd; |
3b377ea9 JL |
314 | unsigned int i; |
315 | ||
82f20856 JB |
316 | size_of_regd = |
317 | sizeof(struct ieee80211_regdomain) + | |
318 | src_regd->n_reg_rules * sizeof(struct ieee80211_reg_rule); | |
3b377ea9 JL |
319 | |
320 | regd = kzalloc(size_of_regd, GFP_KERNEL); | |
321 | if (!regd) | |
e9763c3c | 322 | return ERR_PTR(-ENOMEM); |
3b377ea9 JL |
323 | |
324 | memcpy(regd, src_regd, sizeof(struct ieee80211_regdomain)); | |
325 | ||
326 | for (i = 0; i < src_regd->n_reg_rules; i++) | |
327 | memcpy(®d->reg_rules[i], &src_regd->reg_rules[i], | |
e9763c3c | 328 | sizeof(struct ieee80211_reg_rule)); |
3b377ea9 | 329 | |
e9763c3c | 330 | return regd; |
3b377ea9 JL |
331 | } |
332 | ||
333 | #ifdef CONFIG_CFG80211_INTERNAL_REGDB | |
334 | struct reg_regdb_search_request { | |
335 | char alpha2[2]; | |
336 | struct list_head list; | |
337 | }; | |
338 | ||
339 | static LIST_HEAD(reg_regdb_search_list); | |
368d06f5 | 340 | static DEFINE_MUTEX(reg_regdb_search_mutex); |
3b377ea9 JL |
341 | |
342 | static void reg_regdb_search(struct work_struct *work) | |
343 | { | |
344 | struct reg_regdb_search_request *request; | |
e9763c3c JB |
345 | const struct ieee80211_regdomain *curdom, *regdom = NULL; |
346 | int i; | |
a85d0d7f LR |
347 | |
348 | mutex_lock(&cfg80211_mutex); | |
3b377ea9 | 349 | |
368d06f5 | 350 | mutex_lock(®_regdb_search_mutex); |
3b377ea9 JL |
351 | while (!list_empty(®_regdb_search_list)) { |
352 | request = list_first_entry(®_regdb_search_list, | |
353 | struct reg_regdb_search_request, | |
354 | list); | |
355 | list_del(&request->list); | |
356 | ||
1a919318 | 357 | for (i = 0; i < reg_regdb_size; i++) { |
3b377ea9 JL |
358 | curdom = reg_regdb[i]; |
359 | ||
1a919318 | 360 | if (alpha2_equal(request->alpha2, curdom->alpha2)) { |
e9763c3c | 361 | regdom = reg_copy_regd(curdom); |
3b377ea9 JL |
362 | break; |
363 | } | |
364 | } | |
365 | ||
366 | kfree(request); | |
367 | } | |
368d06f5 | 368 | mutex_unlock(®_regdb_search_mutex); |
a85d0d7f | 369 | |
e9763c3c | 370 | if (!IS_ERR_OR_NULL(regdom)) |
a85d0d7f LR |
371 | set_regdom(regdom); |
372 | ||
373 | mutex_unlock(&cfg80211_mutex); | |
3b377ea9 JL |
374 | } |
375 | ||
376 | static DECLARE_WORK(reg_regdb_work, reg_regdb_search); | |
377 | ||
378 | static void reg_regdb_query(const char *alpha2) | |
379 | { | |
380 | struct reg_regdb_search_request *request; | |
381 | ||
382 | if (!alpha2) | |
383 | return; | |
384 | ||
385 | request = kzalloc(sizeof(struct reg_regdb_search_request), GFP_KERNEL); | |
386 | if (!request) | |
387 | return; | |
388 | ||
389 | memcpy(request->alpha2, alpha2, 2); | |
390 | ||
368d06f5 | 391 | mutex_lock(®_regdb_search_mutex); |
3b377ea9 | 392 | list_add_tail(&request->list, ®_regdb_search_list); |
368d06f5 | 393 | mutex_unlock(®_regdb_search_mutex); |
3b377ea9 JL |
394 | |
395 | schedule_work(®_regdb_work); | |
396 | } | |
80007efe LR |
397 | |
398 | /* Feel free to add any other sanity checks here */ | |
399 | static void reg_regdb_size_check(void) | |
400 | { | |
401 | /* We should ideally BUILD_BUG_ON() but then random builds would fail */ | |
402 | WARN_ONCE(!reg_regdb_size, "db.txt is empty, you should update it..."); | |
403 | } | |
3b377ea9 | 404 | #else |
80007efe | 405 | static inline void reg_regdb_size_check(void) {} |
3b377ea9 JL |
406 | static inline void reg_regdb_query(const char *alpha2) {} |
407 | #endif /* CONFIG_CFG80211_INTERNAL_REGDB */ | |
408 | ||
fb1fc7ad LR |
409 | /* |
410 | * This lets us keep regulatory code which is updated on a regulatory | |
4d9d88d1 SJR |
411 | * basis in userspace. Country information is filled in by |
412 | * reg_device_uevent | |
fb1fc7ad | 413 | */ |
b2e1b302 LR |
414 | static int call_crda(const char *alpha2) |
415 | { | |
b2e1b302 | 416 | if (!is_world_regdom((char *) alpha2)) |
e9c0268f | 417 | pr_info("Calling CRDA for country: %c%c\n", |
b2e1b302 LR |
418 | alpha2[0], alpha2[1]); |
419 | else | |
e9c0268f | 420 | pr_info("Calling CRDA to update world regulatory domain\n"); |
b2e1b302 | 421 | |
3b377ea9 JL |
422 | /* query internal regulatory database (if it exists) */ |
423 | reg_regdb_query(alpha2); | |
424 | ||
4d9d88d1 | 425 | return kobject_uevent(®_pdev->dev.kobj, KOBJ_CHANGE); |
b2e1b302 LR |
426 | } |
427 | ||
6913b49a | 428 | static bool reg_is_valid_request(const char *alpha2) |
b2e1b302 | 429 | { |
6913b49a JB |
430 | assert_reg_lock(); |
431 | ||
f6037d09 JB |
432 | if (!last_request) |
433 | return false; | |
434 | ||
6913b49a JB |
435 | if (last_request->processed) |
436 | return false; | |
437 | ||
f6037d09 | 438 | return alpha2_equal(last_request->alpha2, alpha2); |
b2e1b302 | 439 | } |
8318d78a | 440 | |
b2e1b302 | 441 | /* Sanity check on a regulatory rule */ |
a3d2eaf0 | 442 | static bool is_valid_reg_rule(const struct ieee80211_reg_rule *rule) |
8318d78a | 443 | { |
a3d2eaf0 | 444 | const struct ieee80211_freq_range *freq_range = &rule->freq_range; |
b2e1b302 LR |
445 | u32 freq_diff; |
446 | ||
91e99004 | 447 | if (freq_range->start_freq_khz <= 0 || freq_range->end_freq_khz <= 0) |
b2e1b302 LR |
448 | return false; |
449 | ||
450 | if (freq_range->start_freq_khz > freq_range->end_freq_khz) | |
451 | return false; | |
452 | ||
453 | freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz; | |
454 | ||
bd05f28e | 455 | if (freq_range->end_freq_khz <= freq_range->start_freq_khz || |
1a919318 | 456 | freq_range->max_bandwidth_khz > freq_diff) |
b2e1b302 LR |
457 | return false; |
458 | ||
459 | return true; | |
460 | } | |
461 | ||
a3d2eaf0 | 462 | static bool is_valid_rd(const struct ieee80211_regdomain *rd) |
b2e1b302 | 463 | { |
a3d2eaf0 | 464 | const struct ieee80211_reg_rule *reg_rule = NULL; |
b2e1b302 | 465 | unsigned int i; |
8318d78a | 466 | |
b2e1b302 LR |
467 | if (!rd->n_reg_rules) |
468 | return false; | |
8318d78a | 469 | |
88dc1c3f LR |
470 | if (WARN_ON(rd->n_reg_rules > NL80211_MAX_SUPP_REG_RULES)) |
471 | return false; | |
472 | ||
b2e1b302 LR |
473 | for (i = 0; i < rd->n_reg_rules; i++) { |
474 | reg_rule = &rd->reg_rules[i]; | |
475 | if (!is_valid_reg_rule(reg_rule)) | |
476 | return false; | |
477 | } | |
478 | ||
479 | return true; | |
8318d78a JB |
480 | } |
481 | ||
038659e7 LR |
482 | static bool reg_does_bw_fit(const struct ieee80211_freq_range *freq_range, |
483 | u32 center_freq_khz, | |
484 | u32 bw_khz) | |
b2e1b302 | 485 | { |
038659e7 LR |
486 | u32 start_freq_khz, end_freq_khz; |
487 | ||
488 | start_freq_khz = center_freq_khz - (bw_khz/2); | |
489 | end_freq_khz = center_freq_khz + (bw_khz/2); | |
490 | ||
491 | if (start_freq_khz >= freq_range->start_freq_khz && | |
492 | end_freq_khz <= freq_range->end_freq_khz) | |
493 | return true; | |
494 | ||
495 | return false; | |
b2e1b302 | 496 | } |
8318d78a | 497 | |
0c7dc45d LR |
498 | /** |
499 | * freq_in_rule_band - tells us if a frequency is in a frequency band | |
500 | * @freq_range: frequency rule we want to query | |
501 | * @freq_khz: frequency we are inquiring about | |
502 | * | |
503 | * This lets us know if a specific frequency rule is or is not relevant to | |
504 | * a specific frequency's band. Bands are device specific and artificial | |
64629b9d VK |
505 | * definitions (the "2.4 GHz band", the "5 GHz band" and the "60GHz band"), |
506 | * however it is safe for now to assume that a frequency rule should not be | |
507 | * part of a frequency's band if the start freq or end freq are off by more | |
508 | * than 2 GHz for the 2.4 and 5 GHz bands, and by more than 10 GHz for the | |
509 | * 60 GHz band. | |
0c7dc45d LR |
510 | * This resolution can be lowered and should be considered as we add |
511 | * regulatory rule support for other "bands". | |
512 | **/ | |
513 | static bool freq_in_rule_band(const struct ieee80211_freq_range *freq_range, | |
1a919318 | 514 | u32 freq_khz) |
0c7dc45d LR |
515 | { |
516 | #define ONE_GHZ_IN_KHZ 1000000 | |
64629b9d VK |
517 | /* |
518 | * From 802.11ad: directional multi-gigabit (DMG): | |
519 | * Pertaining to operation in a frequency band containing a channel | |
520 | * with the Channel starting frequency above 45 GHz. | |
521 | */ | |
522 | u32 limit = freq_khz > 45 * ONE_GHZ_IN_KHZ ? | |
523 | 10 * ONE_GHZ_IN_KHZ : 2 * ONE_GHZ_IN_KHZ; | |
524 | if (abs(freq_khz - freq_range->start_freq_khz) <= limit) | |
0c7dc45d | 525 | return true; |
64629b9d | 526 | if (abs(freq_khz - freq_range->end_freq_khz) <= limit) |
0c7dc45d LR |
527 | return true; |
528 | return false; | |
529 | #undef ONE_GHZ_IN_KHZ | |
530 | } | |
531 | ||
fb1fc7ad LR |
532 | /* |
533 | * Helper for regdom_intersect(), this does the real | |
534 | * mathematical intersection fun | |
535 | */ | |
1a919318 JB |
536 | static int reg_rules_intersect(const struct ieee80211_reg_rule *rule1, |
537 | const struct ieee80211_reg_rule *rule2, | |
538 | struct ieee80211_reg_rule *intersected_rule) | |
9c96477d LR |
539 | { |
540 | const struct ieee80211_freq_range *freq_range1, *freq_range2; | |
541 | struct ieee80211_freq_range *freq_range; | |
542 | const struct ieee80211_power_rule *power_rule1, *power_rule2; | |
543 | struct ieee80211_power_rule *power_rule; | |
544 | u32 freq_diff; | |
545 | ||
546 | freq_range1 = &rule1->freq_range; | |
547 | freq_range2 = &rule2->freq_range; | |
548 | freq_range = &intersected_rule->freq_range; | |
549 | ||
550 | power_rule1 = &rule1->power_rule; | |
551 | power_rule2 = &rule2->power_rule; | |
552 | power_rule = &intersected_rule->power_rule; | |
553 | ||
554 | freq_range->start_freq_khz = max(freq_range1->start_freq_khz, | |
1a919318 | 555 | freq_range2->start_freq_khz); |
9c96477d | 556 | freq_range->end_freq_khz = min(freq_range1->end_freq_khz, |
1a919318 | 557 | freq_range2->end_freq_khz); |
9c96477d | 558 | freq_range->max_bandwidth_khz = min(freq_range1->max_bandwidth_khz, |
1a919318 | 559 | freq_range2->max_bandwidth_khz); |
9c96477d LR |
560 | |
561 | freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz; | |
562 | if (freq_range->max_bandwidth_khz > freq_diff) | |
563 | freq_range->max_bandwidth_khz = freq_diff; | |
564 | ||
565 | power_rule->max_eirp = min(power_rule1->max_eirp, | |
566 | power_rule2->max_eirp); | |
567 | power_rule->max_antenna_gain = min(power_rule1->max_antenna_gain, | |
568 | power_rule2->max_antenna_gain); | |
569 | ||
1a919318 | 570 | intersected_rule->flags = rule1->flags | rule2->flags; |
9c96477d LR |
571 | |
572 | if (!is_valid_reg_rule(intersected_rule)) | |
573 | return -EINVAL; | |
574 | ||
575 | return 0; | |
576 | } | |
577 | ||
578 | /** | |
579 | * regdom_intersect - do the intersection between two regulatory domains | |
580 | * @rd1: first regulatory domain | |
581 | * @rd2: second regulatory domain | |
582 | * | |
583 | * Use this function to get the intersection between two regulatory domains. | |
584 | * Once completed we will mark the alpha2 for the rd as intersected, "98", | |
585 | * as no one single alpha2 can represent this regulatory domain. | |
586 | * | |
587 | * Returns a pointer to the regulatory domain structure which will hold the | |
588 | * resulting intersection of rules between rd1 and rd2. We will | |
589 | * kzalloc() this structure for you. | |
590 | */ | |
1a919318 JB |
591 | static struct ieee80211_regdomain * |
592 | regdom_intersect(const struct ieee80211_regdomain *rd1, | |
593 | const struct ieee80211_regdomain *rd2) | |
9c96477d LR |
594 | { |
595 | int r, size_of_regd; | |
596 | unsigned int x, y; | |
597 | unsigned int num_rules = 0, rule_idx = 0; | |
598 | const struct ieee80211_reg_rule *rule1, *rule2; | |
599 | struct ieee80211_reg_rule *intersected_rule; | |
600 | struct ieee80211_regdomain *rd; | |
601 | /* This is just a dummy holder to help us count */ | |
74f53cd8 | 602 | struct ieee80211_reg_rule dummy_rule; |
9c96477d LR |
603 | |
604 | if (!rd1 || !rd2) | |
605 | return NULL; | |
606 | ||
fb1fc7ad LR |
607 | /* |
608 | * First we get a count of the rules we'll need, then we actually | |
9c96477d LR |
609 | * build them. This is to so we can malloc() and free() a |
610 | * regdomain once. The reason we use reg_rules_intersect() here | |
611 | * is it will return -EINVAL if the rule computed makes no sense. | |
fb1fc7ad LR |
612 | * All rules that do check out OK are valid. |
613 | */ | |
9c96477d LR |
614 | |
615 | for (x = 0; x < rd1->n_reg_rules; x++) { | |
616 | rule1 = &rd1->reg_rules[x]; | |
617 | for (y = 0; y < rd2->n_reg_rules; y++) { | |
618 | rule2 = &rd2->reg_rules[y]; | |
74f53cd8 | 619 | if (!reg_rules_intersect(rule1, rule2, &dummy_rule)) |
9c96477d | 620 | num_rules++; |
9c96477d LR |
621 | } |
622 | } | |
623 | ||
624 | if (!num_rules) | |
625 | return NULL; | |
626 | ||
627 | size_of_regd = sizeof(struct ieee80211_regdomain) + | |
82f20856 | 628 | num_rules * sizeof(struct ieee80211_reg_rule); |
9c96477d LR |
629 | |
630 | rd = kzalloc(size_of_regd, GFP_KERNEL); | |
631 | if (!rd) | |
632 | return NULL; | |
633 | ||
8a57fff0 | 634 | for (x = 0; x < rd1->n_reg_rules && rule_idx < num_rules; x++) { |
9c96477d | 635 | rule1 = &rd1->reg_rules[x]; |
8a57fff0 | 636 | for (y = 0; y < rd2->n_reg_rules && rule_idx < num_rules; y++) { |
9c96477d | 637 | rule2 = &rd2->reg_rules[y]; |
fb1fc7ad LR |
638 | /* |
639 | * This time around instead of using the stack lets | |
9c96477d | 640 | * write to the target rule directly saving ourselves |
fb1fc7ad LR |
641 | * a memcpy() |
642 | */ | |
9c96477d | 643 | intersected_rule = &rd->reg_rules[rule_idx]; |
1a919318 | 644 | r = reg_rules_intersect(rule1, rule2, intersected_rule); |
fb1fc7ad LR |
645 | /* |
646 | * No need to memset here the intersected rule here as | |
647 | * we're not using the stack anymore | |
648 | */ | |
9c96477d LR |
649 | if (r) |
650 | continue; | |
651 | rule_idx++; | |
652 | } | |
653 | } | |
654 | ||
655 | if (rule_idx != num_rules) { | |
656 | kfree(rd); | |
657 | return NULL; | |
658 | } | |
659 | ||
660 | rd->n_reg_rules = num_rules; | |
661 | rd->alpha2[0] = '9'; | |
662 | rd->alpha2[1] = '8'; | |
663 | ||
664 | return rd; | |
665 | } | |
666 | ||
fb1fc7ad LR |
667 | /* |
668 | * XXX: add support for the rest of enum nl80211_reg_rule_flags, we may | |
669 | * want to just have the channel structure use these | |
670 | */ | |
b2e1b302 LR |
671 | static u32 map_regdom_flags(u32 rd_flags) |
672 | { | |
673 | u32 channel_flags = 0; | |
674 | if (rd_flags & NL80211_RRF_PASSIVE_SCAN) | |
675 | channel_flags |= IEEE80211_CHAN_PASSIVE_SCAN; | |
676 | if (rd_flags & NL80211_RRF_NO_IBSS) | |
677 | channel_flags |= IEEE80211_CHAN_NO_IBSS; | |
678 | if (rd_flags & NL80211_RRF_DFS) | |
679 | channel_flags |= IEEE80211_CHAN_RADAR; | |
03f6b084 SF |
680 | if (rd_flags & NL80211_RRF_NO_OFDM) |
681 | channel_flags |= IEEE80211_CHAN_NO_OFDM; | |
b2e1b302 LR |
682 | return channel_flags; |
683 | } | |
684 | ||
1fa25e41 LR |
685 | static int freq_reg_info_regd(struct wiphy *wiphy, |
686 | u32 center_freq, | |
038659e7 | 687 | u32 desired_bw_khz, |
1fa25e41 | 688 | const struct ieee80211_reg_rule **reg_rule, |
5d885b99 | 689 | const struct ieee80211_regdomain *regd) |
8318d78a JB |
690 | { |
691 | int i; | |
0c7dc45d | 692 | bool band_rule_found = false; |
038659e7 LR |
693 | bool bw_fits = false; |
694 | ||
695 | if (!desired_bw_khz) | |
696 | desired_bw_khz = MHZ_TO_KHZ(20); | |
8318d78a | 697 | |
3e0c3ff3 | 698 | if (!regd) |
b2e1b302 LR |
699 | return -EINVAL; |
700 | ||
3e0c3ff3 | 701 | for (i = 0; i < regd->n_reg_rules; i++) { |
b2e1b302 LR |
702 | const struct ieee80211_reg_rule *rr; |
703 | const struct ieee80211_freq_range *fr = NULL; | |
b2e1b302 | 704 | |
3e0c3ff3 | 705 | rr = ®d->reg_rules[i]; |
b2e1b302 | 706 | fr = &rr->freq_range; |
0c7dc45d | 707 | |
fb1fc7ad LR |
708 | /* |
709 | * We only need to know if one frequency rule was | |
0c7dc45d | 710 | * was in center_freq's band, that's enough, so lets |
fb1fc7ad LR |
711 | * not overwrite it once found |
712 | */ | |
0c7dc45d LR |
713 | if (!band_rule_found) |
714 | band_rule_found = freq_in_rule_band(fr, center_freq); | |
715 | ||
1a919318 | 716 | bw_fits = reg_does_bw_fit(fr, center_freq, desired_bw_khz); |
0c7dc45d | 717 | |
038659e7 | 718 | if (band_rule_found && bw_fits) { |
b2e1b302 | 719 | *reg_rule = rr; |
038659e7 | 720 | return 0; |
8318d78a JB |
721 | } |
722 | } | |
723 | ||
0c7dc45d LR |
724 | if (!band_rule_found) |
725 | return -ERANGE; | |
726 | ||
038659e7 | 727 | return -EINVAL; |
b2e1b302 LR |
728 | } |
729 | ||
1a919318 | 730 | int freq_reg_info(struct wiphy *wiphy, u32 center_freq, u32 desired_bw_khz, |
038659e7 | 731 | const struct ieee80211_reg_rule **reg_rule) |
1fa25e41 | 732 | { |
5d885b99 JB |
733 | const struct ieee80211_regdomain *regd; |
734 | ||
735 | assert_reg_lock(); | |
ac46d48e | 736 | assert_cfg80211_lock(); |
1a919318 | 737 | |
5d885b99 JB |
738 | /* |
739 | * Follow the driver's regulatory domain, if present, unless a country | |
740 | * IE has been processed or a user wants to help complaince further | |
741 | */ | |
742 | if (last_request->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && | |
743 | last_request->initiator != NL80211_REGDOM_SET_BY_USER && | |
744 | wiphy->regd) | |
745 | regd = wiphy->regd; | |
746 | else | |
747 | regd = cfg80211_regdomain; | |
748 | ||
1a919318 | 749 | return freq_reg_info_regd(wiphy, center_freq, desired_bw_khz, |
5d885b99 | 750 | reg_rule, regd); |
1fa25e41 | 751 | } |
4f366c5d | 752 | EXPORT_SYMBOL(freq_reg_info); |
b2e1b302 | 753 | |
926a0a09 LR |
754 | #ifdef CONFIG_CFG80211_REG_DEBUG |
755 | static const char *reg_initiator_name(enum nl80211_reg_initiator initiator) | |
756 | { | |
757 | switch (initiator) { | |
758 | case NL80211_REGDOM_SET_BY_CORE: | |
759 | return "Set by core"; | |
760 | case NL80211_REGDOM_SET_BY_USER: | |
761 | return "Set by user"; | |
762 | case NL80211_REGDOM_SET_BY_DRIVER: | |
763 | return "Set by driver"; | |
764 | case NL80211_REGDOM_SET_BY_COUNTRY_IE: | |
765 | return "Set by country IE"; | |
766 | default: | |
767 | WARN_ON(1); | |
768 | return "Set by bug"; | |
769 | } | |
770 | } | |
e702d3cf LR |
771 | |
772 | static void chan_reg_rule_print_dbg(struct ieee80211_channel *chan, | |
773 | u32 desired_bw_khz, | |
774 | const struct ieee80211_reg_rule *reg_rule) | |
775 | { | |
776 | const struct ieee80211_power_rule *power_rule; | |
777 | const struct ieee80211_freq_range *freq_range; | |
778 | char max_antenna_gain[32]; | |
779 | ||
780 | power_rule = ®_rule->power_rule; | |
781 | freq_range = ®_rule->freq_range; | |
782 | ||
783 | if (!power_rule->max_antenna_gain) | |
784 | snprintf(max_antenna_gain, 32, "N/A"); | |
785 | else | |
786 | snprintf(max_antenna_gain, 32, "%d", power_rule->max_antenna_gain); | |
787 | ||
1a919318 JB |
788 | REG_DBG_PRINT("Updating information on frequency %d MHz for a %d MHz width channel with regulatory rule:\n", |
789 | chan->center_freq, KHZ_TO_MHZ(desired_bw_khz)); | |
e702d3cf | 790 | |
56e6786e | 791 | REG_DBG_PRINT("%d KHz - %d KHz @ %d KHz), (%s mBi, %d mBm)\n", |
1a919318 JB |
792 | freq_range->start_freq_khz, freq_range->end_freq_khz, |
793 | freq_range->max_bandwidth_khz, max_antenna_gain, | |
e702d3cf LR |
794 | power_rule->max_eirp); |
795 | } | |
796 | #else | |
797 | static void chan_reg_rule_print_dbg(struct ieee80211_channel *chan, | |
798 | u32 desired_bw_khz, | |
799 | const struct ieee80211_reg_rule *reg_rule) | |
800 | { | |
801 | return; | |
802 | } | |
926a0a09 LR |
803 | #endif |
804 | ||
038659e7 LR |
805 | /* |
806 | * Note that right now we assume the desired channel bandwidth | |
807 | * is always 20 MHz for each individual channel (HT40 uses 20 MHz | |
808 | * per channel, the primary and the extension channel). To support | |
809 | * smaller custom bandwidths such as 5 MHz or 10 MHz we'll need a | |
810 | * new ieee80211_channel.target_bw and re run the regulatory check | |
811 | * on the wiphy with the target_bw specified. Then we can simply use | |
812 | * that below for the desired_bw_khz below. | |
813 | */ | |
7ca43d03 LR |
814 | static void handle_channel(struct wiphy *wiphy, |
815 | enum nl80211_reg_initiator initiator, | |
fdc9d7b2 | 816 | struct ieee80211_channel *chan) |
b2e1b302 LR |
817 | { |
818 | int r; | |
038659e7 LR |
819 | u32 flags, bw_flags = 0; |
820 | u32 desired_bw_khz = MHZ_TO_KHZ(20); | |
b2e1b302 LR |
821 | const struct ieee80211_reg_rule *reg_rule = NULL; |
822 | const struct ieee80211_power_rule *power_rule = NULL; | |
038659e7 | 823 | const struct ieee80211_freq_range *freq_range = NULL; |
fe33eb39 | 824 | struct wiphy *request_wiphy = NULL; |
a92a3ce7 | 825 | |
761cf7ec LR |
826 | assert_cfg80211_lock(); |
827 | ||
806a9e39 LR |
828 | request_wiphy = wiphy_idx_to_wiphy(last_request->wiphy_idx); |
829 | ||
a92a3ce7 | 830 | flags = chan->orig_flags; |
b2e1b302 | 831 | |
1a919318 JB |
832 | r = freq_reg_info(wiphy, MHZ_TO_KHZ(chan->center_freq), |
833 | desired_bw_khz, ®_rule); | |
ca4ffe8f LR |
834 | if (r) { |
835 | /* | |
836 | * We will disable all channels that do not match our | |
25985edc | 837 | * received regulatory rule unless the hint is coming |
ca4ffe8f LR |
838 | * from a Country IE and the Country IE had no information |
839 | * about a band. The IEEE 802.11 spec allows for an AP | |
840 | * to send only a subset of the regulatory rules allowed, | |
841 | * so an AP in the US that only supports 2.4 GHz may only send | |
842 | * a country IE with information for the 2.4 GHz band | |
843 | * while 5 GHz is still supported. | |
844 | */ | |
845 | if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE && | |
846 | r == -ERANGE) | |
847 | return; | |
848 | ||
d91e41b6 | 849 | REG_DBG_PRINT("Disabling freq %d MHz\n", chan->center_freq); |
ca4ffe8f | 850 | chan->flags = IEEE80211_CHAN_DISABLED; |
8318d78a | 851 | return; |
ca4ffe8f | 852 | } |
8318d78a | 853 | |
e702d3cf LR |
854 | chan_reg_rule_print_dbg(chan, desired_bw_khz, reg_rule); |
855 | ||
b2e1b302 | 856 | power_rule = ®_rule->power_rule; |
038659e7 LR |
857 | freq_range = ®_rule->freq_range; |
858 | ||
859 | if (freq_range->max_bandwidth_khz < MHZ_TO_KHZ(40)) | |
860 | bw_flags = IEEE80211_CHAN_NO_HT40; | |
b2e1b302 | 861 | |
7db90f4a | 862 | if (last_request->initiator == NL80211_REGDOM_SET_BY_DRIVER && |
806a9e39 | 863 | request_wiphy && request_wiphy == wiphy && |
5be83de5 | 864 | request_wiphy->flags & WIPHY_FLAG_STRICT_REGULATORY) { |
fb1fc7ad | 865 | /* |
25985edc | 866 | * This guarantees the driver's requested regulatory domain |
f976376d | 867 | * will always be used as a base for further regulatory |
fb1fc7ad LR |
868 | * settings |
869 | */ | |
f976376d | 870 | chan->flags = chan->orig_flags = |
038659e7 | 871 | map_regdom_flags(reg_rule->flags) | bw_flags; |
f976376d LR |
872 | chan->max_antenna_gain = chan->orig_mag = |
873 | (int) MBI_TO_DBI(power_rule->max_antenna_gain); | |
279f0f55 | 874 | chan->max_reg_power = chan->max_power = chan->orig_mpwr = |
f976376d LR |
875 | (int) MBM_TO_DBM(power_rule->max_eirp); |
876 | return; | |
877 | } | |
878 | ||
aa3d7eef | 879 | chan->beacon_found = false; |
038659e7 | 880 | chan->flags = flags | bw_flags | map_regdom_flags(reg_rule->flags); |
1a919318 JB |
881 | chan->max_antenna_gain = |
882 | min_t(int, chan->orig_mag, | |
883 | MBI_TO_DBI(power_rule->max_antenna_gain)); | |
eccc068e | 884 | chan->max_reg_power = (int) MBM_TO_DBM(power_rule->max_eirp); |
5e31fc08 SG |
885 | if (chan->orig_mpwr) { |
886 | /* | |
887 | * Devices that have their own custom regulatory domain | |
888 | * but also use WIPHY_FLAG_STRICT_REGULATORY will follow the | |
889 | * passed country IE power settings. | |
890 | */ | |
891 | if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE && | |
892 | wiphy->flags & WIPHY_FLAG_CUSTOM_REGULATORY && | |
893 | wiphy->flags & WIPHY_FLAG_STRICT_REGULATORY) | |
894 | chan->max_power = chan->max_reg_power; | |
895 | else | |
896 | chan->max_power = min(chan->orig_mpwr, | |
897 | chan->max_reg_power); | |
898 | } else | |
899 | chan->max_power = chan->max_reg_power; | |
8318d78a JB |
900 | } |
901 | ||
fdc9d7b2 JB |
902 | static void handle_band(struct wiphy *wiphy, |
903 | enum nl80211_reg_initiator initiator, | |
904 | struct ieee80211_supported_band *sband) | |
8318d78a | 905 | { |
a92a3ce7 | 906 | unsigned int i; |
a92a3ce7 | 907 | |
fdc9d7b2 JB |
908 | if (!sband) |
909 | return; | |
8318d78a JB |
910 | |
911 | for (i = 0; i < sband->n_channels; i++) | |
fdc9d7b2 | 912 | handle_channel(wiphy, initiator, &sband->channels[i]); |
8318d78a JB |
913 | } |
914 | ||
57b5ce07 LR |
915 | static bool reg_request_cell_base(struct regulatory_request *request) |
916 | { | |
917 | if (request->initiator != NL80211_REGDOM_SET_BY_USER) | |
918 | return false; | |
1a919318 | 919 | return request->user_reg_hint_type == NL80211_USER_REG_HINT_CELL_BASE; |
57b5ce07 LR |
920 | } |
921 | ||
922 | bool reg_last_request_cell_base(void) | |
923 | { | |
ebd0fd2b | 924 | bool val; |
1a919318 | 925 | |
57b5ce07 | 926 | mutex_lock(®_mutex); |
ebd0fd2b | 927 | val = reg_request_cell_base(last_request); |
57b5ce07 | 928 | mutex_unlock(®_mutex); |
1a919318 | 929 | |
ebd0fd2b | 930 | return val; |
57b5ce07 LR |
931 | } |
932 | ||
933 | #ifdef CONFIG_CFG80211_CERTIFICATION_ONUS | |
57b5ce07 | 934 | /* Core specific check */ |
2f92212b JB |
935 | static enum reg_request_treatment |
936 | reg_ignore_cell_hint(struct regulatory_request *pending_request) | |
57b5ce07 LR |
937 | { |
938 | if (!reg_num_devs_support_basehint) | |
2f92212b | 939 | return REG_REQ_IGNORE; |
57b5ce07 | 940 | |
1a919318 JB |
941 | if (reg_request_cell_base(last_request) && |
942 | !regdom_changes(pending_request->alpha2)) | |
2f92212b | 943 | return REG_REQ_ALREADY_SET; |
1a919318 | 944 | |
2f92212b | 945 | return REG_REQ_OK; |
57b5ce07 LR |
946 | } |
947 | ||
948 | /* Device specific check */ | |
949 | static bool reg_dev_ignore_cell_hint(struct wiphy *wiphy) | |
950 | { | |
1a919318 | 951 | return !(wiphy->features & NL80211_FEATURE_CELL_BASE_REG_HINTS); |
57b5ce07 LR |
952 | } |
953 | #else | |
954 | static int reg_ignore_cell_hint(struct regulatory_request *pending_request) | |
955 | { | |
2f92212b | 956 | return REG_REQ_IGNORE; |
57b5ce07 | 957 | } |
1a919318 JB |
958 | |
959 | static bool reg_dev_ignore_cell_hint(struct wiphy *wiphy) | |
57b5ce07 LR |
960 | { |
961 | return true; | |
962 | } | |
963 | #endif | |
964 | ||
965 | ||
7db90f4a LR |
966 | static bool ignore_reg_update(struct wiphy *wiphy, |
967 | enum nl80211_reg_initiator initiator) | |
14b9815a | 968 | { |
926a0a09 | 969 | if (!last_request) { |
1a919318 | 970 | REG_DBG_PRINT("Ignoring regulatory request %s since last_request is not set\n", |
926a0a09 | 971 | reg_initiator_name(initiator)); |
14b9815a | 972 | return true; |
926a0a09 LR |
973 | } |
974 | ||
7db90f4a | 975 | if (initiator == NL80211_REGDOM_SET_BY_CORE && |
926a0a09 | 976 | wiphy->flags & WIPHY_FLAG_CUSTOM_REGULATORY) { |
1a919318 | 977 | REG_DBG_PRINT("Ignoring regulatory request %s since the driver uses its own custom regulatory domain\n", |
926a0a09 | 978 | reg_initiator_name(initiator)); |
14b9815a | 979 | return true; |
926a0a09 LR |
980 | } |
981 | ||
fb1fc7ad LR |
982 | /* |
983 | * wiphy->regd will be set once the device has its own | |
984 | * desired regulatory domain set | |
985 | */ | |
5be83de5 | 986 | if (wiphy->flags & WIPHY_FLAG_STRICT_REGULATORY && !wiphy->regd && |
749b527b | 987 | initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && |
926a0a09 | 988 | !is_world_regdom(last_request->alpha2)) { |
1a919318 | 989 | REG_DBG_PRINT("Ignoring regulatory request %s since the driver requires its own regulatory domain to be set first\n", |
926a0a09 | 990 | reg_initiator_name(initiator)); |
14b9815a | 991 | return true; |
926a0a09 LR |
992 | } |
993 | ||
57b5ce07 LR |
994 | if (reg_request_cell_base(last_request)) |
995 | return reg_dev_ignore_cell_hint(wiphy); | |
996 | ||
14b9815a LR |
997 | return false; |
998 | } | |
999 | ||
1a919318 | 1000 | static void handle_reg_beacon(struct wiphy *wiphy, unsigned int chan_idx, |
e38f8a7a LR |
1001 | struct reg_beacon *reg_beacon) |
1002 | { | |
e38f8a7a LR |
1003 | struct ieee80211_supported_band *sband; |
1004 | struct ieee80211_channel *chan; | |
6bad8766 LR |
1005 | bool channel_changed = false; |
1006 | struct ieee80211_channel chan_before; | |
e38f8a7a | 1007 | |
e38f8a7a LR |
1008 | sband = wiphy->bands[reg_beacon->chan.band]; |
1009 | chan = &sband->channels[chan_idx]; | |
1010 | ||
1011 | if (likely(chan->center_freq != reg_beacon->chan.center_freq)) | |
1012 | return; | |
1013 | ||
6bad8766 LR |
1014 | if (chan->beacon_found) |
1015 | return; | |
1016 | ||
1017 | chan->beacon_found = true; | |
1018 | ||
5be83de5 | 1019 | if (wiphy->flags & WIPHY_FLAG_DISABLE_BEACON_HINTS) |
37184244 LR |
1020 | return; |
1021 | ||
6bad8766 LR |
1022 | chan_before.center_freq = chan->center_freq; |
1023 | chan_before.flags = chan->flags; | |
1024 | ||
37184244 | 1025 | if (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN) { |
e38f8a7a | 1026 | chan->flags &= ~IEEE80211_CHAN_PASSIVE_SCAN; |
6bad8766 | 1027 | channel_changed = true; |
e38f8a7a LR |
1028 | } |
1029 | ||
37184244 | 1030 | if (chan->flags & IEEE80211_CHAN_NO_IBSS) { |
e38f8a7a | 1031 | chan->flags &= ~IEEE80211_CHAN_NO_IBSS; |
6bad8766 | 1032 | channel_changed = true; |
e38f8a7a LR |
1033 | } |
1034 | ||
6bad8766 LR |
1035 | if (channel_changed) |
1036 | nl80211_send_beacon_hint_event(wiphy, &chan_before, chan); | |
e38f8a7a LR |
1037 | } |
1038 | ||
1039 | /* | |
1040 | * Called when a scan on a wiphy finds a beacon on | |
1041 | * new channel | |
1042 | */ | |
1043 | static void wiphy_update_new_beacon(struct wiphy *wiphy, | |
1044 | struct reg_beacon *reg_beacon) | |
1045 | { | |
1046 | unsigned int i; | |
1047 | struct ieee80211_supported_band *sband; | |
1048 | ||
e38f8a7a LR |
1049 | if (!wiphy->bands[reg_beacon->chan.band]) |
1050 | return; | |
1051 | ||
1052 | sband = wiphy->bands[reg_beacon->chan.band]; | |
1053 | ||
1054 | for (i = 0; i < sband->n_channels; i++) | |
1055 | handle_reg_beacon(wiphy, i, reg_beacon); | |
1056 | } | |
1057 | ||
1058 | /* | |
1059 | * Called upon reg changes or a new wiphy is added | |
1060 | */ | |
1061 | static void wiphy_update_beacon_reg(struct wiphy *wiphy) | |
1062 | { | |
1063 | unsigned int i; | |
1064 | struct ieee80211_supported_band *sband; | |
1065 | struct reg_beacon *reg_beacon; | |
1066 | ||
e38f8a7a LR |
1067 | list_for_each_entry(reg_beacon, ®_beacon_list, list) { |
1068 | if (!wiphy->bands[reg_beacon->chan.band]) | |
1069 | continue; | |
1070 | sband = wiphy->bands[reg_beacon->chan.band]; | |
1071 | for (i = 0; i < sband->n_channels; i++) | |
1072 | handle_reg_beacon(wiphy, i, reg_beacon); | |
1073 | } | |
1074 | } | |
1075 | ||
1076 | static bool reg_is_world_roaming(struct wiphy *wiphy) | |
1077 | { | |
e8da2bb4 JB |
1078 | assert_cfg80211_lock(); |
1079 | ||
e38f8a7a LR |
1080 | if (is_world_regdom(cfg80211_regdomain->alpha2) || |
1081 | (wiphy->regd && is_world_regdom(wiphy->regd->alpha2))) | |
1082 | return true; | |
b1ed8ddd LR |
1083 | if (last_request && |
1084 | last_request->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && | |
5be83de5 | 1085 | wiphy->flags & WIPHY_FLAG_CUSTOM_REGULATORY) |
e38f8a7a LR |
1086 | return true; |
1087 | return false; | |
1088 | } | |
1089 | ||
1090 | /* Reap the advantages of previously found beacons */ | |
1091 | static void reg_process_beacons(struct wiphy *wiphy) | |
1092 | { | |
b1ed8ddd LR |
1093 | /* |
1094 | * Means we are just firing up cfg80211, so no beacons would | |
1095 | * have been processed yet. | |
1096 | */ | |
1097 | if (!last_request) | |
1098 | return; | |
e38f8a7a LR |
1099 | if (!reg_is_world_roaming(wiphy)) |
1100 | return; | |
1101 | wiphy_update_beacon_reg(wiphy); | |
1102 | } | |
1103 | ||
1a919318 | 1104 | static bool is_ht40_allowed(struct ieee80211_channel *chan) |
038659e7 LR |
1105 | { |
1106 | if (!chan) | |
1a919318 | 1107 | return false; |
038659e7 | 1108 | if (chan->flags & IEEE80211_CHAN_DISABLED) |
1a919318 | 1109 | return false; |
038659e7 | 1110 | /* This would happen when regulatory rules disallow HT40 completely */ |
1a919318 | 1111 | return !(chan->flags & IEEE80211_CHAN_NO_HT40); |
038659e7 LR |
1112 | } |
1113 | ||
1114 | static void reg_process_ht_flags_channel(struct wiphy *wiphy, | |
fdc9d7b2 | 1115 | struct ieee80211_channel *channel) |
038659e7 | 1116 | { |
fdc9d7b2 | 1117 | struct ieee80211_supported_band *sband = wiphy->bands[channel->band]; |
038659e7 LR |
1118 | struct ieee80211_channel *channel_before = NULL, *channel_after = NULL; |
1119 | unsigned int i; | |
1120 | ||
1a919318 | 1121 | if (!is_ht40_allowed(channel)) { |
038659e7 LR |
1122 | channel->flags |= IEEE80211_CHAN_NO_HT40; |
1123 | return; | |
1124 | } | |
1125 | ||
1126 | /* | |
1127 | * We need to ensure the extension channels exist to | |
1128 | * be able to use HT40- or HT40+, this finds them (or not) | |
1129 | */ | |
1130 | for (i = 0; i < sband->n_channels; i++) { | |
1131 | struct ieee80211_channel *c = &sband->channels[i]; | |
1a919318 | 1132 | |
038659e7 LR |
1133 | if (c->center_freq == (channel->center_freq - 20)) |
1134 | channel_before = c; | |
1135 | if (c->center_freq == (channel->center_freq + 20)) | |
1136 | channel_after = c; | |
1137 | } | |
1138 | ||
1139 | /* | |
1140 | * Please note that this assumes target bandwidth is 20 MHz, | |
1141 | * if that ever changes we also need to change the below logic | |
1142 | * to include that as well. | |
1143 | */ | |
1a919318 | 1144 | if (!is_ht40_allowed(channel_before)) |
689da1b3 | 1145 | channel->flags |= IEEE80211_CHAN_NO_HT40MINUS; |
038659e7 | 1146 | else |
689da1b3 | 1147 | channel->flags &= ~IEEE80211_CHAN_NO_HT40MINUS; |
038659e7 | 1148 | |
1a919318 | 1149 | if (!is_ht40_allowed(channel_after)) |
689da1b3 | 1150 | channel->flags |= IEEE80211_CHAN_NO_HT40PLUS; |
038659e7 | 1151 | else |
689da1b3 | 1152 | channel->flags &= ~IEEE80211_CHAN_NO_HT40PLUS; |
038659e7 LR |
1153 | } |
1154 | ||
1155 | static void reg_process_ht_flags_band(struct wiphy *wiphy, | |
fdc9d7b2 | 1156 | struct ieee80211_supported_band *sband) |
038659e7 LR |
1157 | { |
1158 | unsigned int i; | |
038659e7 | 1159 | |
fdc9d7b2 JB |
1160 | if (!sband) |
1161 | return; | |
038659e7 LR |
1162 | |
1163 | for (i = 0; i < sband->n_channels; i++) | |
fdc9d7b2 | 1164 | reg_process_ht_flags_channel(wiphy, &sband->channels[i]); |
038659e7 LR |
1165 | } |
1166 | ||
1167 | static void reg_process_ht_flags(struct wiphy *wiphy) | |
1168 | { | |
1169 | enum ieee80211_band band; | |
1170 | ||
1171 | if (!wiphy) | |
1172 | return; | |
1173 | ||
fdc9d7b2 JB |
1174 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) |
1175 | reg_process_ht_flags_band(wiphy, wiphy->bands[band]); | |
038659e7 LR |
1176 | } |
1177 | ||
eac03e38 SN |
1178 | static void wiphy_update_regulatory(struct wiphy *wiphy, |
1179 | enum nl80211_reg_initiator initiator) | |
b2e1b302 LR |
1180 | { |
1181 | enum ieee80211_band band; | |
d46e5b1d | 1182 | |
e8da2bb4 | 1183 | assert_cfg80211_lock(); |
eac03e38 SN |
1184 | assert_reg_lock(); |
1185 | ||
7db90f4a | 1186 | if (ignore_reg_update(wiphy, initiator)) |
a203c2aa SN |
1187 | return; |
1188 | ||
b68e6b3b LR |
1189 | last_request->dfs_region = cfg80211_regdomain->dfs_region; |
1190 | ||
fdc9d7b2 JB |
1191 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) |
1192 | handle_band(wiphy, initiator, wiphy->bands[band]); | |
a203c2aa | 1193 | |
e38f8a7a | 1194 | reg_process_beacons(wiphy); |
038659e7 | 1195 | reg_process_ht_flags(wiphy); |
1a919318 | 1196 | |
560e28e1 | 1197 | if (wiphy->reg_notifier) |
716f9392 | 1198 | wiphy->reg_notifier(wiphy, last_request); |
b2e1b302 LR |
1199 | } |
1200 | ||
d7549cbb SN |
1201 | static void update_all_wiphy_regulatory(enum nl80211_reg_initiator initiator) |
1202 | { | |
1203 | struct cfg80211_registered_device *rdev; | |
4a38994f | 1204 | struct wiphy *wiphy; |
d7549cbb | 1205 | |
4a38994f RM |
1206 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) { |
1207 | wiphy = &rdev->wiphy; | |
1208 | wiphy_update_regulatory(wiphy, initiator); | |
1209 | /* | |
1210 | * Regulatory updates set by CORE are ignored for custom | |
1211 | * regulatory cards. Let us notify the changes to the driver, | |
1212 | * as some drivers used this to restore its orig_* reg domain. | |
1213 | */ | |
1214 | if (initiator == NL80211_REGDOM_SET_BY_CORE && | |
1215 | wiphy->flags & WIPHY_FLAG_CUSTOM_REGULATORY && | |
1216 | wiphy->reg_notifier) | |
1217 | wiphy->reg_notifier(wiphy, last_request); | |
1218 | } | |
d7549cbb SN |
1219 | } |
1220 | ||
1fa25e41 | 1221 | static void handle_channel_custom(struct wiphy *wiphy, |
fdc9d7b2 | 1222 | struct ieee80211_channel *chan, |
1fa25e41 LR |
1223 | const struct ieee80211_regdomain *regd) |
1224 | { | |
1225 | int r; | |
038659e7 LR |
1226 | u32 desired_bw_khz = MHZ_TO_KHZ(20); |
1227 | u32 bw_flags = 0; | |
1fa25e41 LR |
1228 | const struct ieee80211_reg_rule *reg_rule = NULL; |
1229 | const struct ieee80211_power_rule *power_rule = NULL; | |
038659e7 | 1230 | const struct ieee80211_freq_range *freq_range = NULL; |
1fa25e41 | 1231 | |
1a919318 JB |
1232 | r = freq_reg_info_regd(wiphy, MHZ_TO_KHZ(chan->center_freq), |
1233 | desired_bw_khz, ®_rule, regd); | |
1fa25e41 LR |
1234 | |
1235 | if (r) { | |
1a919318 JB |
1236 | REG_DBG_PRINT("Disabling freq %d MHz as custom regd has no rule that fits a %d MHz wide channel\n", |
1237 | chan->center_freq, KHZ_TO_MHZ(desired_bw_khz)); | |
1fa25e41 LR |
1238 | chan->flags = IEEE80211_CHAN_DISABLED; |
1239 | return; | |
1240 | } | |
1241 | ||
e702d3cf LR |
1242 | chan_reg_rule_print_dbg(chan, desired_bw_khz, reg_rule); |
1243 | ||
1fa25e41 | 1244 | power_rule = ®_rule->power_rule; |
038659e7 LR |
1245 | freq_range = ®_rule->freq_range; |
1246 | ||
1247 | if (freq_range->max_bandwidth_khz < MHZ_TO_KHZ(40)) | |
1248 | bw_flags = IEEE80211_CHAN_NO_HT40; | |
1fa25e41 | 1249 | |
038659e7 | 1250 | chan->flags |= map_regdom_flags(reg_rule->flags) | bw_flags; |
1fa25e41 | 1251 | chan->max_antenna_gain = (int) MBI_TO_DBI(power_rule->max_antenna_gain); |
279f0f55 FF |
1252 | chan->max_reg_power = chan->max_power = |
1253 | (int) MBM_TO_DBM(power_rule->max_eirp); | |
1fa25e41 LR |
1254 | } |
1255 | ||
fdc9d7b2 JB |
1256 | static void handle_band_custom(struct wiphy *wiphy, |
1257 | struct ieee80211_supported_band *sband, | |
1fa25e41 LR |
1258 | const struct ieee80211_regdomain *regd) |
1259 | { | |
1260 | unsigned int i; | |
1fa25e41 | 1261 | |
fdc9d7b2 JB |
1262 | if (!sband) |
1263 | return; | |
1fa25e41 LR |
1264 | |
1265 | for (i = 0; i < sband->n_channels; i++) | |
fdc9d7b2 | 1266 | handle_channel_custom(wiphy, &sband->channels[i], regd); |
1fa25e41 LR |
1267 | } |
1268 | ||
1269 | /* Used by drivers prior to wiphy registration */ | |
1270 | void wiphy_apply_custom_regulatory(struct wiphy *wiphy, | |
1271 | const struct ieee80211_regdomain *regd) | |
1272 | { | |
1273 | enum ieee80211_band band; | |
bbcf3f02 | 1274 | unsigned int bands_set = 0; |
ac46d48e | 1275 | |
1fa25e41 | 1276 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) { |
bbcf3f02 LR |
1277 | if (!wiphy->bands[band]) |
1278 | continue; | |
fdc9d7b2 | 1279 | handle_band_custom(wiphy, wiphy->bands[band], regd); |
bbcf3f02 | 1280 | bands_set++; |
b2e1b302 | 1281 | } |
bbcf3f02 LR |
1282 | |
1283 | /* | |
1284 | * no point in calling this if it won't have any effect | |
1a919318 | 1285 | * on your device's supported bands. |
bbcf3f02 LR |
1286 | */ |
1287 | WARN_ON(!bands_set); | |
b2e1b302 | 1288 | } |
1fa25e41 LR |
1289 | EXPORT_SYMBOL(wiphy_apply_custom_regulatory); |
1290 | ||
84fa4f43 JB |
1291 | /* This has the logic which determines when a new request |
1292 | * should be ignored. */ | |
2f92212b JB |
1293 | static enum reg_request_treatment |
1294 | get_reg_request_treatment(struct wiphy *wiphy, | |
2f92cd2e | 1295 | struct regulatory_request *pending_request) |
84fa4f43 | 1296 | { |
806a9e39 | 1297 | struct wiphy *last_wiphy = NULL; |
761cf7ec | 1298 | |
84fa4f43 JB |
1299 | /* All initial requests are respected */ |
1300 | if (!last_request) | |
2f92212b | 1301 | return REG_REQ_OK; |
84fa4f43 | 1302 | |
2f92cd2e | 1303 | switch (pending_request->initiator) { |
7db90f4a | 1304 | case NL80211_REGDOM_SET_BY_CORE: |
2f92212b | 1305 | return REG_REQ_OK; |
7db90f4a | 1306 | case NL80211_REGDOM_SET_BY_COUNTRY_IE: |
57b5ce07 LR |
1307 | if (reg_request_cell_base(last_request)) { |
1308 | /* Trust a Cell base station over the AP's country IE */ | |
1309 | if (regdom_changes(pending_request->alpha2)) | |
2f92212b JB |
1310 | return REG_REQ_IGNORE; |
1311 | return REG_REQ_ALREADY_SET; | |
57b5ce07 LR |
1312 | } |
1313 | ||
806a9e39 LR |
1314 | last_wiphy = wiphy_idx_to_wiphy(last_request->wiphy_idx); |
1315 | ||
2f92cd2e | 1316 | if (unlikely(!is_an_alpha2(pending_request->alpha2))) |
84fa4f43 | 1317 | return -EINVAL; |
7db90f4a LR |
1318 | if (last_request->initiator == |
1319 | NL80211_REGDOM_SET_BY_COUNTRY_IE) { | |
806a9e39 | 1320 | if (last_wiphy != wiphy) { |
84fa4f43 JB |
1321 | /* |
1322 | * Two cards with two APs claiming different | |
1fe90b03 | 1323 | * Country IE alpha2s. We could |
84fa4f43 JB |
1324 | * intersect them, but that seems unlikely |
1325 | * to be correct. Reject second one for now. | |
1326 | */ | |
2f92cd2e | 1327 | if (regdom_changes(pending_request->alpha2)) |
2f92212b JB |
1328 | return REG_REQ_IGNORE; |
1329 | return REG_REQ_ALREADY_SET; | |
84fa4f43 | 1330 | } |
fb1fc7ad LR |
1331 | /* |
1332 | * Two consecutive Country IE hints on the same wiphy. | |
1333 | * This should be picked up early by the driver/stack | |
1334 | */ | |
2f92cd2e | 1335 | if (WARN_ON(regdom_changes(pending_request->alpha2))) |
2f92212b JB |
1336 | return REG_REQ_OK; |
1337 | return REG_REQ_ALREADY_SET; | |
84fa4f43 | 1338 | } |
a171fba4 | 1339 | return 0; |
7db90f4a LR |
1340 | case NL80211_REGDOM_SET_BY_DRIVER: |
1341 | if (last_request->initiator == NL80211_REGDOM_SET_BY_CORE) { | |
2f92cd2e | 1342 | if (regdom_changes(pending_request->alpha2)) |
2f92212b JB |
1343 | return REG_REQ_OK; |
1344 | return REG_REQ_ALREADY_SET; | |
e74b1e7f | 1345 | } |
fff32c04 LR |
1346 | |
1347 | /* | |
1348 | * This would happen if you unplug and plug your card | |
1349 | * back in or if you add a new device for which the previously | |
1350 | * loaded card also agrees on the regulatory domain. | |
1351 | */ | |
7db90f4a | 1352 | if (last_request->initiator == NL80211_REGDOM_SET_BY_DRIVER && |
2f92cd2e | 1353 | !regdom_changes(pending_request->alpha2)) |
2f92212b | 1354 | return REG_REQ_ALREADY_SET; |
fff32c04 | 1355 | |
2f92212b | 1356 | return REG_REQ_INTERSECT; |
7db90f4a | 1357 | case NL80211_REGDOM_SET_BY_USER: |
57b5ce07 LR |
1358 | if (reg_request_cell_base(pending_request)) |
1359 | return reg_ignore_cell_hint(pending_request); | |
1360 | ||
1361 | if (reg_request_cell_base(last_request)) | |
2f92212b | 1362 | return REG_REQ_IGNORE; |
57b5ce07 | 1363 | |
7db90f4a | 1364 | if (last_request->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) |
2f92212b | 1365 | return REG_REQ_INTERSECT; |
fb1fc7ad LR |
1366 | /* |
1367 | * If the user knows better the user should set the regdom | |
1368 | * to their country before the IE is picked up | |
1369 | */ | |
7db90f4a | 1370 | if (last_request->initiator == NL80211_REGDOM_SET_BY_USER && |
1a919318 | 1371 | last_request->intersect) |
2f92212b | 1372 | return REG_REQ_IGNORE; |
fb1fc7ad LR |
1373 | /* |
1374 | * Process user requests only after previous user/driver/core | |
1375 | * requests have been processed | |
1376 | */ | |
1a919318 JB |
1377 | if ((last_request->initiator == NL80211_REGDOM_SET_BY_CORE || |
1378 | last_request->initiator == NL80211_REGDOM_SET_BY_DRIVER || | |
1379 | last_request->initiator == NL80211_REGDOM_SET_BY_USER) && | |
1380 | regdom_changes(last_request->alpha2)) | |
2f92212b | 1381 | return REG_REQ_IGNORE; |
5eebade6 | 1382 | |
baeb66fe | 1383 | if (!regdom_changes(pending_request->alpha2)) |
2f92212b | 1384 | return REG_REQ_ALREADY_SET; |
e74b1e7f | 1385 | |
2f92212b | 1386 | return REG_REQ_OK; |
84fa4f43 JB |
1387 | } |
1388 | ||
2f92212b | 1389 | return REG_REQ_IGNORE; |
84fa4f43 JB |
1390 | } |
1391 | ||
b2e253cf LR |
1392 | static void reg_set_request_processed(void) |
1393 | { | |
1394 | bool need_more_processing = false; | |
1395 | ||
1396 | last_request->processed = true; | |
1397 | ||
1398 | spin_lock(®_requests_lock); | |
1399 | if (!list_empty(®_requests_list)) | |
1400 | need_more_processing = true; | |
1401 | spin_unlock(®_requests_lock); | |
1402 | ||
a90c7a31 | 1403 | if (last_request->initiator == NL80211_REGDOM_SET_BY_USER) |
fe20b39e | 1404 | cancel_delayed_work(®_timeout); |
a90c7a31 | 1405 | |
b2e253cf LR |
1406 | if (need_more_processing) |
1407 | schedule_work(®_work); | |
1408 | } | |
1409 | ||
d1c96a9a LR |
1410 | /** |
1411 | * __regulatory_hint - hint to the wireless core a regulatory domain | |
1412 | * @wiphy: if the hint comes from country information from an AP, this | |
1413 | * is required to be set to the wiphy that received the information | |
28da32d7 | 1414 | * @pending_request: the regulatory request currently being processed |
d1c96a9a LR |
1415 | * |
1416 | * The Wireless subsystem can use this function to hint to the wireless core | |
28da32d7 | 1417 | * what it believes should be the current regulatory domain. |
d1c96a9a | 1418 | * |
2f92212b | 1419 | * Returns one of the different reg request treatment values. |
d1c96a9a | 1420 | * |
abc7381b | 1421 | * Caller must hold &cfg80211_mutex and ®_mutex |
d1c96a9a | 1422 | */ |
2f92212b JB |
1423 | static enum reg_request_treatment |
1424 | __regulatory_hint(struct wiphy *wiphy, | |
1425 | struct regulatory_request *pending_request) | |
b2e1b302 | 1426 | { |
e9763c3c | 1427 | const struct ieee80211_regdomain *regd; |
9c96477d | 1428 | bool intersect = false; |
2f92212b | 1429 | enum reg_request_treatment treatment; |
b2e1b302 | 1430 | |
761cf7ec LR |
1431 | assert_cfg80211_lock(); |
1432 | ||
2f92212b | 1433 | treatment = get_reg_request_treatment(wiphy, pending_request); |
9c96477d | 1434 | |
2f92212b JB |
1435 | switch (treatment) { |
1436 | case REG_REQ_INTERSECT: | |
7db90f4a LR |
1437 | if (pending_request->initiator == |
1438 | NL80211_REGDOM_SET_BY_DRIVER) { | |
e9763c3c JB |
1439 | regd = reg_copy_regd(cfg80211_regdomain); |
1440 | if (IS_ERR(regd)) { | |
d951c1dd | 1441 | kfree(pending_request); |
e9763c3c | 1442 | return PTR_ERR(regd); |
d951c1dd | 1443 | } |
e9763c3c | 1444 | wiphy->regd = regd; |
3e0c3ff3 | 1445 | } |
9c96477d | 1446 | intersect = true; |
2f92212b JB |
1447 | break; |
1448 | case REG_REQ_OK: | |
1449 | break; | |
1450 | default: | |
fb1fc7ad LR |
1451 | /* |
1452 | * If the regulatory domain being requested by the | |
3e0c3ff3 | 1453 | * driver has already been set just copy it to the |
fb1fc7ad LR |
1454 | * wiphy |
1455 | */ | |
2f92212b JB |
1456 | if (treatment == REG_REQ_ALREADY_SET && |
1457 | pending_request->initiator == NL80211_REGDOM_SET_BY_DRIVER) { | |
e9763c3c JB |
1458 | regd = reg_copy_regd(cfg80211_regdomain); |
1459 | if (IS_ERR(regd)) { | |
d951c1dd | 1460 | kfree(pending_request); |
2f92212b | 1461 | return REG_REQ_IGNORE; |
d951c1dd | 1462 | } |
2f92212b | 1463 | treatment = REG_REQ_ALREADY_SET; |
e9763c3c | 1464 | wiphy->regd = regd; |
3e0c3ff3 LR |
1465 | goto new_request; |
1466 | } | |
d951c1dd | 1467 | kfree(pending_request); |
2f92212b | 1468 | return treatment; |
3e0c3ff3 | 1469 | } |
b2e1b302 | 1470 | |
3e0c3ff3 | 1471 | new_request: |
a042994d LR |
1472 | if (last_request != &core_request_world) |
1473 | kfree(last_request); | |
5203cdb6 | 1474 | |
d951c1dd LR |
1475 | last_request = pending_request; |
1476 | last_request->intersect = intersect; | |
6913b49a | 1477 | last_request->processed = false; |
5203cdb6 | 1478 | |
d951c1dd | 1479 | pending_request = NULL; |
3e0c3ff3 | 1480 | |
09d989d1 LR |
1481 | if (last_request->initiator == NL80211_REGDOM_SET_BY_USER) { |
1482 | user_alpha2[0] = last_request->alpha2[0]; | |
1483 | user_alpha2[1] = last_request->alpha2[1]; | |
1484 | } | |
1485 | ||
2f92212b JB |
1486 | /* When r == REG_REQ_INTERSECT we do need to call CRDA */ |
1487 | if (treatment != REG_REQ_OK && treatment != REG_REQ_INTERSECT) { | |
73d54c9e LR |
1488 | /* |
1489 | * Since CRDA will not be called in this case as we already | |
1490 | * have applied the requested regulatory domain before we just | |
1491 | * inform userspace we have processed the request | |
1492 | */ | |
2f92212b | 1493 | if (treatment == REG_REQ_ALREADY_SET) { |
73d54c9e | 1494 | nl80211_send_reg_change_event(last_request); |
b2e253cf LR |
1495 | reg_set_request_processed(); |
1496 | } | |
2f92212b | 1497 | return treatment; |
73d54c9e | 1498 | } |
3e0c3ff3 | 1499 | |
2f92212b JB |
1500 | if (call_crda(last_request->alpha2)) |
1501 | return REG_REQ_IGNORE; | |
1502 | return REG_REQ_OK; | |
b2e1b302 LR |
1503 | } |
1504 | ||
30a548c7 | 1505 | /* This processes *all* regulatory hints */ |
8848bef0 LR |
1506 | static void reg_process_hint(struct regulatory_request *reg_request, |
1507 | enum nl80211_reg_initiator reg_initiator) | |
fe33eb39 | 1508 | { |
fe33eb39 LR |
1509 | struct wiphy *wiphy = NULL; |
1510 | ||
fdc9d7b2 JB |
1511 | if (WARN_ON(!reg_request->alpha2)) |
1512 | return; | |
fe33eb39 | 1513 | |
f4173766 | 1514 | if (reg_request->wiphy_idx != WIPHY_IDX_INVALID) |
fe33eb39 LR |
1515 | wiphy = wiphy_idx_to_wiphy(reg_request->wiphy_idx); |
1516 | ||
1a919318 | 1517 | if (reg_initiator == NL80211_REGDOM_SET_BY_DRIVER && !wiphy) { |
d951c1dd | 1518 | kfree(reg_request); |
b0e2880b | 1519 | return; |
fe33eb39 LR |
1520 | } |
1521 | ||
2f92212b JB |
1522 | switch (__regulatory_hint(wiphy, reg_request)) { |
1523 | case REG_REQ_ALREADY_SET: | |
1524 | /* This is required so that the orig_* parameters are saved */ | |
1525 | if (wiphy && wiphy->flags & WIPHY_FLAG_STRICT_REGULATORY) | |
1526 | wiphy_update_regulatory(wiphy, reg_initiator); | |
1527 | break; | |
1528 | default: | |
1529 | if (reg_initiator == NL80211_REGDOM_SET_BY_USER) | |
1530 | schedule_delayed_work(®_timeout, | |
1531 | msecs_to_jiffies(3142)); | |
1532 | break; | |
a90c7a31 | 1533 | } |
fe33eb39 LR |
1534 | } |
1535 | ||
b2e253cf LR |
1536 | /* |
1537 | * Processes regulatory hints, this is all the NL80211_REGDOM_SET_BY_* | |
1538 | * Regulatory hints come on a first come first serve basis and we | |
1539 | * must process each one atomically. | |
1540 | */ | |
fe33eb39 | 1541 | static void reg_process_pending_hints(void) |
b0e2880b | 1542 | { |
fe33eb39 | 1543 | struct regulatory_request *reg_request; |
fe33eb39 | 1544 | |
b0e2880b LR |
1545 | mutex_lock(&cfg80211_mutex); |
1546 | mutex_lock(®_mutex); | |
1547 | ||
b2e253cf LR |
1548 | /* When last_request->processed becomes true this will be rescheduled */ |
1549 | if (last_request && !last_request->processed) { | |
1a919318 | 1550 | REG_DBG_PRINT("Pending regulatory request, waiting for it to be processed...\n"); |
b2e253cf LR |
1551 | goto out; |
1552 | } | |
1553 | ||
fe33eb39 | 1554 | spin_lock(®_requests_lock); |
fe33eb39 | 1555 | |
b2e253cf | 1556 | if (list_empty(®_requests_list)) { |
d951c1dd | 1557 | spin_unlock(®_requests_lock); |
b2e253cf | 1558 | goto out; |
fe33eb39 | 1559 | } |
b2e253cf LR |
1560 | |
1561 | reg_request = list_first_entry(®_requests_list, | |
1562 | struct regulatory_request, | |
1563 | list); | |
1564 | list_del_init(®_request->list); | |
1565 | ||
fe33eb39 | 1566 | spin_unlock(®_requests_lock); |
b0e2880b | 1567 | |
8848bef0 | 1568 | reg_process_hint(reg_request, reg_request->initiator); |
b2e253cf LR |
1569 | |
1570 | out: | |
b0e2880b LR |
1571 | mutex_unlock(®_mutex); |
1572 | mutex_unlock(&cfg80211_mutex); | |
fe33eb39 LR |
1573 | } |
1574 | ||
e38f8a7a LR |
1575 | /* Processes beacon hints -- this has nothing to do with country IEs */ |
1576 | static void reg_process_pending_beacon_hints(void) | |
1577 | { | |
79c97e97 | 1578 | struct cfg80211_registered_device *rdev; |
e38f8a7a LR |
1579 | struct reg_beacon *pending_beacon, *tmp; |
1580 | ||
abc7381b LR |
1581 | /* |
1582 | * No need to hold the reg_mutex here as we just touch wiphys | |
1583 | * and do not read or access regulatory variables. | |
1584 | */ | |
e38f8a7a LR |
1585 | mutex_lock(&cfg80211_mutex); |
1586 | ||
1587 | /* This goes through the _pending_ beacon list */ | |
1588 | spin_lock_bh(®_pending_beacons_lock); | |
1589 | ||
e38f8a7a LR |
1590 | list_for_each_entry_safe(pending_beacon, tmp, |
1591 | ®_pending_beacons, list) { | |
e38f8a7a LR |
1592 | list_del_init(&pending_beacon->list); |
1593 | ||
1594 | /* Applies the beacon hint to current wiphys */ | |
79c97e97 JB |
1595 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) |
1596 | wiphy_update_new_beacon(&rdev->wiphy, pending_beacon); | |
e38f8a7a LR |
1597 | |
1598 | /* Remembers the beacon hint for new wiphys or reg changes */ | |
1599 | list_add_tail(&pending_beacon->list, ®_beacon_list); | |
1600 | } | |
1601 | ||
1602 | spin_unlock_bh(®_pending_beacons_lock); | |
e38f8a7a LR |
1603 | mutex_unlock(&cfg80211_mutex); |
1604 | } | |
1605 | ||
fe33eb39 LR |
1606 | static void reg_todo(struct work_struct *work) |
1607 | { | |
1608 | reg_process_pending_hints(); | |
e38f8a7a | 1609 | reg_process_pending_beacon_hints(); |
fe33eb39 LR |
1610 | } |
1611 | ||
fe33eb39 LR |
1612 | static void queue_regulatory_request(struct regulatory_request *request) |
1613 | { | |
d4f2c881 JB |
1614 | request->alpha2[0] = toupper(request->alpha2[0]); |
1615 | request->alpha2[1] = toupper(request->alpha2[1]); | |
c61029c7 | 1616 | |
fe33eb39 LR |
1617 | spin_lock(®_requests_lock); |
1618 | list_add_tail(&request->list, ®_requests_list); | |
1619 | spin_unlock(®_requests_lock); | |
1620 | ||
1621 | schedule_work(®_work); | |
1622 | } | |
1623 | ||
09d989d1 LR |
1624 | /* |
1625 | * Core regulatory hint -- happens during cfg80211_init() | |
1626 | * and when we restore regulatory settings. | |
1627 | */ | |
ba25c141 LR |
1628 | static int regulatory_hint_core(const char *alpha2) |
1629 | { | |
1630 | struct regulatory_request *request; | |
1631 | ||
1a919318 | 1632 | request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); |
ba25c141 LR |
1633 | if (!request) |
1634 | return -ENOMEM; | |
1635 | ||
1636 | request->alpha2[0] = alpha2[0]; | |
1637 | request->alpha2[1] = alpha2[1]; | |
7db90f4a | 1638 | request->initiator = NL80211_REGDOM_SET_BY_CORE; |
ba25c141 | 1639 | |
31e99729 | 1640 | queue_regulatory_request(request); |
5078b2e3 | 1641 | |
fe33eb39 | 1642 | return 0; |
ba25c141 LR |
1643 | } |
1644 | ||
fe33eb39 | 1645 | /* User hints */ |
57b5ce07 LR |
1646 | int regulatory_hint_user(const char *alpha2, |
1647 | enum nl80211_user_reg_hint_type user_reg_hint_type) | |
b2e1b302 | 1648 | { |
fe33eb39 LR |
1649 | struct regulatory_request *request; |
1650 | ||
fdc9d7b2 JB |
1651 | if (WARN_ON(!alpha2)) |
1652 | return -EINVAL; | |
b2e1b302 | 1653 | |
fe33eb39 LR |
1654 | request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); |
1655 | if (!request) | |
1656 | return -ENOMEM; | |
1657 | ||
f4173766 | 1658 | request->wiphy_idx = WIPHY_IDX_INVALID; |
fe33eb39 LR |
1659 | request->alpha2[0] = alpha2[0]; |
1660 | request->alpha2[1] = alpha2[1]; | |
e12822e1 | 1661 | request->initiator = NL80211_REGDOM_SET_BY_USER; |
57b5ce07 | 1662 | request->user_reg_hint_type = user_reg_hint_type; |
fe33eb39 LR |
1663 | |
1664 | queue_regulatory_request(request); | |
1665 | ||
1666 | return 0; | |
1667 | } | |
1668 | ||
1669 | /* Driver hints */ | |
1670 | int regulatory_hint(struct wiphy *wiphy, const char *alpha2) | |
1671 | { | |
1672 | struct regulatory_request *request; | |
1673 | ||
fdc9d7b2 JB |
1674 | if (WARN_ON(!alpha2 || !wiphy)) |
1675 | return -EINVAL; | |
fe33eb39 LR |
1676 | |
1677 | request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); | |
1678 | if (!request) | |
1679 | return -ENOMEM; | |
1680 | ||
1681 | request->wiphy_idx = get_wiphy_idx(wiphy); | |
1682 | ||
fe33eb39 LR |
1683 | request->alpha2[0] = alpha2[0]; |
1684 | request->alpha2[1] = alpha2[1]; | |
7db90f4a | 1685 | request->initiator = NL80211_REGDOM_SET_BY_DRIVER; |
fe33eb39 LR |
1686 | |
1687 | queue_regulatory_request(request); | |
1688 | ||
1689 | return 0; | |
b2e1b302 LR |
1690 | } |
1691 | EXPORT_SYMBOL(regulatory_hint); | |
1692 | ||
4b44c8bc LR |
1693 | /* |
1694 | * We hold wdev_lock() here so we cannot hold cfg80211_mutex() and | |
1695 | * therefore cannot iterate over the rdev list here. | |
1696 | */ | |
1a919318 JB |
1697 | void regulatory_hint_11d(struct wiphy *wiphy, enum ieee80211_band band, |
1698 | const u8 *country_ie, u8 country_ie_len) | |
3f2355cb | 1699 | { |
3f2355cb | 1700 | char alpha2[2]; |
3f2355cb | 1701 | enum environment_cap env = ENVIRON_ANY; |
fe33eb39 | 1702 | struct regulatory_request *request; |
3f2355cb | 1703 | |
abc7381b | 1704 | mutex_lock(®_mutex); |
3f2355cb | 1705 | |
9828b017 LR |
1706 | if (unlikely(!last_request)) |
1707 | goto out; | |
d335fe63 | 1708 | |
3f2355cb LR |
1709 | /* IE len must be evenly divisible by 2 */ |
1710 | if (country_ie_len & 0x01) | |
1711 | goto out; | |
1712 | ||
1713 | if (country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN) | |
1714 | goto out; | |
1715 | ||
3f2355cb LR |
1716 | alpha2[0] = country_ie[0]; |
1717 | alpha2[1] = country_ie[1]; | |
1718 | ||
1719 | if (country_ie[2] == 'I') | |
1720 | env = ENVIRON_INDOOR; | |
1721 | else if (country_ie[2] == 'O') | |
1722 | env = ENVIRON_OUTDOOR; | |
1723 | ||
fb1fc7ad | 1724 | /* |
8b19e6ca | 1725 | * We will run this only upon a successful connection on cfg80211. |
4b44c8bc LR |
1726 | * We leave conflict resolution to the workqueue, where can hold |
1727 | * cfg80211_mutex. | |
fb1fc7ad | 1728 | */ |
f4173766 JB |
1729 | if (last_request->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE && |
1730 | last_request->wiphy_idx != WIPHY_IDX_INVALID) | |
4b44c8bc | 1731 | goto out; |
3f2355cb | 1732 | |
fe33eb39 LR |
1733 | request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); |
1734 | if (!request) | |
f9f9b6e3 | 1735 | goto out; |
fe33eb39 | 1736 | |
fe33eb39 | 1737 | request->wiphy_idx = get_wiphy_idx(wiphy); |
4f366c5d JL |
1738 | request->alpha2[0] = alpha2[0]; |
1739 | request->alpha2[1] = alpha2[1]; | |
7db90f4a | 1740 | request->initiator = NL80211_REGDOM_SET_BY_COUNTRY_IE; |
fe33eb39 LR |
1741 | request->country_ie_env = env; |
1742 | ||
fe33eb39 | 1743 | queue_regulatory_request(request); |
3f2355cb | 1744 | out: |
abc7381b | 1745 | mutex_unlock(®_mutex); |
3f2355cb | 1746 | } |
b2e1b302 | 1747 | |
09d989d1 LR |
1748 | static void restore_alpha2(char *alpha2, bool reset_user) |
1749 | { | |
1750 | /* indicates there is no alpha2 to consider for restoration */ | |
1751 | alpha2[0] = '9'; | |
1752 | alpha2[1] = '7'; | |
1753 | ||
1754 | /* The user setting has precedence over the module parameter */ | |
1755 | if (is_user_regdom_saved()) { | |
1756 | /* Unless we're asked to ignore it and reset it */ | |
1757 | if (reset_user) { | |
1a919318 | 1758 | REG_DBG_PRINT("Restoring regulatory settings including user preference\n"); |
09d989d1 LR |
1759 | user_alpha2[0] = '9'; |
1760 | user_alpha2[1] = '7'; | |
1761 | ||
1762 | /* | |
1763 | * If we're ignoring user settings, we still need to | |
1764 | * check the module parameter to ensure we put things | |
1765 | * back as they were for a full restore. | |
1766 | */ | |
1767 | if (!is_world_regdom(ieee80211_regdom)) { | |
1a919318 JB |
1768 | REG_DBG_PRINT("Keeping preference on module parameter ieee80211_regdom: %c%c\n", |
1769 | ieee80211_regdom[0], ieee80211_regdom[1]); | |
09d989d1 LR |
1770 | alpha2[0] = ieee80211_regdom[0]; |
1771 | alpha2[1] = ieee80211_regdom[1]; | |
1772 | } | |
1773 | } else { | |
1a919318 JB |
1774 | REG_DBG_PRINT("Restoring regulatory settings while preserving user preference for: %c%c\n", |
1775 | user_alpha2[0], user_alpha2[1]); | |
09d989d1 LR |
1776 | alpha2[0] = user_alpha2[0]; |
1777 | alpha2[1] = user_alpha2[1]; | |
1778 | } | |
1779 | } else if (!is_world_regdom(ieee80211_regdom)) { | |
1a919318 JB |
1780 | REG_DBG_PRINT("Keeping preference on module parameter ieee80211_regdom: %c%c\n", |
1781 | ieee80211_regdom[0], ieee80211_regdom[1]); | |
09d989d1 LR |
1782 | alpha2[0] = ieee80211_regdom[0]; |
1783 | alpha2[1] = ieee80211_regdom[1]; | |
1784 | } else | |
d91e41b6 | 1785 | REG_DBG_PRINT("Restoring regulatory settings\n"); |
09d989d1 LR |
1786 | } |
1787 | ||
5ce543d1 RM |
1788 | static void restore_custom_reg_settings(struct wiphy *wiphy) |
1789 | { | |
1790 | struct ieee80211_supported_band *sband; | |
1791 | enum ieee80211_band band; | |
1792 | struct ieee80211_channel *chan; | |
1793 | int i; | |
1794 | ||
1795 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) { | |
1796 | sband = wiphy->bands[band]; | |
1797 | if (!sband) | |
1798 | continue; | |
1799 | for (i = 0; i < sband->n_channels; i++) { | |
1800 | chan = &sband->channels[i]; | |
1801 | chan->flags = chan->orig_flags; | |
1802 | chan->max_antenna_gain = chan->orig_mag; | |
1803 | chan->max_power = chan->orig_mpwr; | |
899852af | 1804 | chan->beacon_found = false; |
5ce543d1 RM |
1805 | } |
1806 | } | |
1807 | } | |
1808 | ||
09d989d1 LR |
1809 | /* |
1810 | * Restoring regulatory settings involves ingoring any | |
1811 | * possibly stale country IE information and user regulatory | |
1812 | * settings if so desired, this includes any beacon hints | |
1813 | * learned as we could have traveled outside to another country | |
1814 | * after disconnection. To restore regulatory settings we do | |
1815 | * exactly what we did at bootup: | |
1816 | * | |
1817 | * - send a core regulatory hint | |
1818 | * - send a user regulatory hint if applicable | |
1819 | * | |
1820 | * Device drivers that send a regulatory hint for a specific country | |
1821 | * keep their own regulatory domain on wiphy->regd so that does does | |
1822 | * not need to be remembered. | |
1823 | */ | |
1824 | static void restore_regulatory_settings(bool reset_user) | |
1825 | { | |
1826 | char alpha2[2]; | |
cee0bec5 | 1827 | char world_alpha2[2]; |
09d989d1 | 1828 | struct reg_beacon *reg_beacon, *btmp; |
14609555 LR |
1829 | struct regulatory_request *reg_request, *tmp; |
1830 | LIST_HEAD(tmp_reg_req_list); | |
5ce543d1 | 1831 | struct cfg80211_registered_device *rdev; |
09d989d1 LR |
1832 | |
1833 | mutex_lock(&cfg80211_mutex); | |
1834 | mutex_lock(®_mutex); | |
1835 | ||
a042994d | 1836 | reset_regdomains(true); |
09d989d1 LR |
1837 | restore_alpha2(alpha2, reset_user); |
1838 | ||
14609555 LR |
1839 | /* |
1840 | * If there's any pending requests we simply | |
1841 | * stash them to a temporary pending queue and | |
1842 | * add then after we've restored regulatory | |
1843 | * settings. | |
1844 | */ | |
1845 | spin_lock(®_requests_lock); | |
fea9bced JB |
1846 | list_for_each_entry_safe(reg_request, tmp, ®_requests_list, list) { |
1847 | if (reg_request->initiator != NL80211_REGDOM_SET_BY_USER) | |
1848 | continue; | |
1849 | list_move_tail(®_request->list, &tmp_reg_req_list); | |
14609555 LR |
1850 | } |
1851 | spin_unlock(®_requests_lock); | |
1852 | ||
09d989d1 LR |
1853 | /* Clear beacon hints */ |
1854 | spin_lock_bh(®_pending_beacons_lock); | |
fea9bced JB |
1855 | list_for_each_entry_safe(reg_beacon, btmp, ®_pending_beacons, list) { |
1856 | list_del(®_beacon->list); | |
1857 | kfree(reg_beacon); | |
09d989d1 LR |
1858 | } |
1859 | spin_unlock_bh(®_pending_beacons_lock); | |
1860 | ||
fea9bced JB |
1861 | list_for_each_entry_safe(reg_beacon, btmp, ®_beacon_list, list) { |
1862 | list_del(®_beacon->list); | |
1863 | kfree(reg_beacon); | |
09d989d1 LR |
1864 | } |
1865 | ||
1866 | /* First restore to the basic regulatory settings */ | |
1867 | cfg80211_regdomain = cfg80211_world_regdom; | |
cee0bec5 DS |
1868 | world_alpha2[0] = cfg80211_regdomain->alpha2[0]; |
1869 | world_alpha2[1] = cfg80211_regdomain->alpha2[1]; | |
09d989d1 | 1870 | |
5ce543d1 RM |
1871 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) { |
1872 | if (rdev->wiphy.flags & WIPHY_FLAG_CUSTOM_REGULATORY) | |
1873 | restore_custom_reg_settings(&rdev->wiphy); | |
1874 | } | |
1875 | ||
cee0bec5 | 1876 | regulatory_hint_core(world_alpha2); |
09d989d1 LR |
1877 | |
1878 | /* | |
1879 | * This restores the ieee80211_regdom module parameter | |
1880 | * preference or the last user requested regulatory | |
1881 | * settings, user regulatory settings takes precedence. | |
1882 | */ | |
1883 | if (is_an_alpha2(alpha2)) | |
57b5ce07 | 1884 | regulatory_hint_user(user_alpha2, NL80211_USER_REG_HINT_USER); |
09d989d1 | 1885 | |
14609555 | 1886 | spin_lock(®_requests_lock); |
11cff96c | 1887 | list_splice_tail_init(&tmp_reg_req_list, ®_requests_list); |
14609555 LR |
1888 | spin_unlock(®_requests_lock); |
1889 | ||
1890 | mutex_unlock(®_mutex); | |
1891 | mutex_unlock(&cfg80211_mutex); | |
1892 | ||
1893 | REG_DBG_PRINT("Kicking the queue\n"); | |
1894 | ||
1895 | schedule_work(®_work); | |
1896 | } | |
09d989d1 LR |
1897 | |
1898 | void regulatory_hint_disconnect(void) | |
1899 | { | |
1a919318 | 1900 | REG_DBG_PRINT("All devices are disconnected, going to restore regulatory settings\n"); |
09d989d1 LR |
1901 | restore_regulatory_settings(false); |
1902 | } | |
1903 | ||
e38f8a7a LR |
1904 | static bool freq_is_chan_12_13_14(u16 freq) |
1905 | { | |
59eb21a6 BR |
1906 | if (freq == ieee80211_channel_to_frequency(12, IEEE80211_BAND_2GHZ) || |
1907 | freq == ieee80211_channel_to_frequency(13, IEEE80211_BAND_2GHZ) || | |
1908 | freq == ieee80211_channel_to_frequency(14, IEEE80211_BAND_2GHZ)) | |
e38f8a7a LR |
1909 | return true; |
1910 | return false; | |
1911 | } | |
1912 | ||
1913 | int regulatory_hint_found_beacon(struct wiphy *wiphy, | |
1914 | struct ieee80211_channel *beacon_chan, | |
1915 | gfp_t gfp) | |
1916 | { | |
1917 | struct reg_beacon *reg_beacon; | |
1918 | ||
1a919318 JB |
1919 | if (beacon_chan->beacon_found || |
1920 | beacon_chan->flags & IEEE80211_CHAN_RADAR || | |
e38f8a7a | 1921 | (beacon_chan->band == IEEE80211_BAND_2GHZ && |
1a919318 | 1922 | !freq_is_chan_12_13_14(beacon_chan->center_freq))) |
e38f8a7a LR |
1923 | return 0; |
1924 | ||
1925 | reg_beacon = kzalloc(sizeof(struct reg_beacon), gfp); | |
1926 | if (!reg_beacon) | |
1927 | return -ENOMEM; | |
1928 | ||
1a919318 | 1929 | REG_DBG_PRINT("Found new beacon on frequency: %d MHz (Ch %d) on %s\n", |
4113f751 LR |
1930 | beacon_chan->center_freq, |
1931 | ieee80211_frequency_to_channel(beacon_chan->center_freq), | |
1932 | wiphy_name(wiphy)); | |
1933 | ||
e38f8a7a | 1934 | memcpy(®_beacon->chan, beacon_chan, |
1a919318 | 1935 | sizeof(struct ieee80211_channel)); |
e38f8a7a LR |
1936 | |
1937 | /* | |
1938 | * Since we can be called from BH or and non-BH context | |
1939 | * we must use spin_lock_bh() | |
1940 | */ | |
1941 | spin_lock_bh(®_pending_beacons_lock); | |
1942 | list_add_tail(®_beacon->list, ®_pending_beacons); | |
1943 | spin_unlock_bh(®_pending_beacons_lock); | |
1944 | ||
1945 | schedule_work(®_work); | |
1946 | ||
1947 | return 0; | |
1948 | } | |
1949 | ||
a3d2eaf0 | 1950 | static void print_rd_rules(const struct ieee80211_regdomain *rd) |
b2e1b302 LR |
1951 | { |
1952 | unsigned int i; | |
a3d2eaf0 JB |
1953 | const struct ieee80211_reg_rule *reg_rule = NULL; |
1954 | const struct ieee80211_freq_range *freq_range = NULL; | |
1955 | const struct ieee80211_power_rule *power_rule = NULL; | |
b2e1b302 | 1956 | |
6653325a | 1957 | pr_info(" (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)\n"); |
b2e1b302 LR |
1958 | |
1959 | for (i = 0; i < rd->n_reg_rules; i++) { | |
1960 | reg_rule = &rd->reg_rules[i]; | |
1961 | freq_range = ®_rule->freq_range; | |
1962 | power_rule = ®_rule->power_rule; | |
1963 | ||
fb1fc7ad LR |
1964 | /* |
1965 | * There may not be documentation for max antenna gain | |
1966 | * in certain regions | |
1967 | */ | |
b2e1b302 | 1968 | if (power_rule->max_antenna_gain) |
6653325a | 1969 | pr_info(" (%d KHz - %d KHz @ %d KHz), (%d mBi, %d mBm)\n", |
b2e1b302 LR |
1970 | freq_range->start_freq_khz, |
1971 | freq_range->end_freq_khz, | |
1972 | freq_range->max_bandwidth_khz, | |
1973 | power_rule->max_antenna_gain, | |
1974 | power_rule->max_eirp); | |
1975 | else | |
6653325a | 1976 | pr_info(" (%d KHz - %d KHz @ %d KHz), (N/A, %d mBm)\n", |
b2e1b302 LR |
1977 | freq_range->start_freq_khz, |
1978 | freq_range->end_freq_khz, | |
1979 | freq_range->max_bandwidth_khz, | |
1980 | power_rule->max_eirp); | |
1981 | } | |
1982 | } | |
1983 | ||
8b60b078 LR |
1984 | bool reg_supported_dfs_region(u8 dfs_region) |
1985 | { | |
1986 | switch (dfs_region) { | |
1987 | case NL80211_DFS_UNSET: | |
1988 | case NL80211_DFS_FCC: | |
1989 | case NL80211_DFS_ETSI: | |
1990 | case NL80211_DFS_JP: | |
1991 | return true; | |
1992 | default: | |
1993 | REG_DBG_PRINT("Ignoring uknown DFS master region: %d\n", | |
1994 | dfs_region); | |
1995 | return false; | |
1996 | } | |
1997 | } | |
1998 | ||
1999 | static void print_dfs_region(u8 dfs_region) | |
2000 | { | |
2001 | if (!dfs_region) | |
2002 | return; | |
2003 | ||
2004 | switch (dfs_region) { | |
2005 | case NL80211_DFS_FCC: | |
2006 | pr_info(" DFS Master region FCC"); | |
2007 | break; | |
2008 | case NL80211_DFS_ETSI: | |
2009 | pr_info(" DFS Master region ETSI"); | |
2010 | break; | |
2011 | case NL80211_DFS_JP: | |
2012 | pr_info(" DFS Master region JP"); | |
2013 | break; | |
2014 | default: | |
1a919318 | 2015 | pr_info(" DFS Master region Unknown"); |
8b60b078 LR |
2016 | break; |
2017 | } | |
2018 | } | |
2019 | ||
a3d2eaf0 | 2020 | static void print_regdomain(const struct ieee80211_regdomain *rd) |
b2e1b302 LR |
2021 | { |
2022 | ||
3f2355cb | 2023 | if (is_intersected_alpha2(rd->alpha2)) { |
7db90f4a LR |
2024 | if (last_request->initiator == |
2025 | NL80211_REGDOM_SET_BY_COUNTRY_IE) { | |
79c97e97 JB |
2026 | struct cfg80211_registered_device *rdev; |
2027 | rdev = cfg80211_rdev_by_wiphy_idx( | |
806a9e39 | 2028 | last_request->wiphy_idx); |
79c97e97 | 2029 | if (rdev) { |
e9c0268f | 2030 | pr_info("Current regulatory domain updated by AP to: %c%c\n", |
79c97e97 JB |
2031 | rdev->country_ie_alpha2[0], |
2032 | rdev->country_ie_alpha2[1]); | |
3f2355cb | 2033 | } else |
e9c0268f | 2034 | pr_info("Current regulatory domain intersected:\n"); |
3f2355cb | 2035 | } else |
e9c0268f | 2036 | pr_info("Current regulatory domain intersected:\n"); |
1a919318 | 2037 | } else if (is_world_regdom(rd->alpha2)) { |
e9c0268f | 2038 | pr_info("World regulatory domain updated:\n"); |
1a919318 | 2039 | } else { |
b2e1b302 | 2040 | if (is_unknown_alpha2(rd->alpha2)) |
e9c0268f | 2041 | pr_info("Regulatory domain changed to driver built-in settings (unknown country)\n"); |
57b5ce07 LR |
2042 | else { |
2043 | if (reg_request_cell_base(last_request)) | |
1a919318 | 2044 | pr_info("Regulatory domain changed to country: %c%c by Cell Station\n", |
57b5ce07 LR |
2045 | rd->alpha2[0], rd->alpha2[1]); |
2046 | else | |
1a919318 | 2047 | pr_info("Regulatory domain changed to country: %c%c\n", |
57b5ce07 LR |
2048 | rd->alpha2[0], rd->alpha2[1]); |
2049 | } | |
b2e1b302 | 2050 | } |
1a919318 | 2051 | |
8b60b078 | 2052 | print_dfs_region(rd->dfs_region); |
b2e1b302 LR |
2053 | print_rd_rules(rd); |
2054 | } | |
2055 | ||
2df78167 | 2056 | static void print_regdomain_info(const struct ieee80211_regdomain *rd) |
b2e1b302 | 2057 | { |
e9c0268f | 2058 | pr_info("Regulatory domain: %c%c\n", rd->alpha2[0], rd->alpha2[1]); |
b2e1b302 LR |
2059 | print_rd_rules(rd); |
2060 | } | |
2061 | ||
d2372b31 | 2062 | /* Takes ownership of rd only if it doesn't fail */ |
a3d2eaf0 | 2063 | static int __set_regdom(const struct ieee80211_regdomain *rd) |
b2e1b302 | 2064 | { |
e9763c3c | 2065 | const struct ieee80211_regdomain *regd; |
9c96477d | 2066 | const struct ieee80211_regdomain *intersected_rd = NULL; |
806a9e39 | 2067 | struct wiphy *request_wiphy; |
6913b49a | 2068 | |
b2e1b302 LR |
2069 | /* Some basic sanity checks first */ |
2070 | ||
6913b49a JB |
2071 | if (!reg_is_valid_request(rd->alpha2)) |
2072 | return -EINVAL; | |
2073 | ||
b2e1b302 | 2074 | if (is_world_regdom(rd->alpha2)) { |
b2e1b302 LR |
2075 | update_world_regdomain(rd); |
2076 | return 0; | |
2077 | } | |
b2e1b302 LR |
2078 | |
2079 | if (!is_alpha2_set(rd->alpha2) && !is_an_alpha2(rd->alpha2) && | |
1a919318 | 2080 | !is_unknown_alpha2(rd->alpha2)) |
b2e1b302 LR |
2081 | return -EINVAL; |
2082 | ||
fb1fc7ad LR |
2083 | /* |
2084 | * Lets only bother proceeding on the same alpha2 if the current | |
3f2355cb | 2085 | * rd is non static (it means CRDA was present and was used last) |
fb1fc7ad LR |
2086 | * and the pending request came in from a country IE |
2087 | */ | |
7db90f4a | 2088 | if (last_request->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE) { |
fb1fc7ad LR |
2089 | /* |
2090 | * If someone else asked us to change the rd lets only bother | |
2091 | * checking if the alpha2 changes if CRDA was already called | |
2092 | */ | |
baeb66fe | 2093 | if (!regdom_changes(rd->alpha2)) |
95908535 | 2094 | return -EALREADY; |
3f2355cb LR |
2095 | } |
2096 | ||
fb1fc7ad LR |
2097 | /* |
2098 | * Now lets set the regulatory domain, update all driver channels | |
b2e1b302 LR |
2099 | * and finally inform them of what we have done, in case they want |
2100 | * to review or adjust their own settings based on their own | |
fb1fc7ad LR |
2101 | * internal EEPROM data |
2102 | */ | |
b2e1b302 | 2103 | |
8375af3b | 2104 | if (!is_valid_rd(rd)) { |
e9c0268f | 2105 | pr_err("Invalid regulatory domain detected:\n"); |
8375af3b LR |
2106 | print_regdomain_info(rd); |
2107 | return -EINVAL; | |
b2e1b302 LR |
2108 | } |
2109 | ||
806a9e39 | 2110 | request_wiphy = wiphy_idx_to_wiphy(last_request->wiphy_idx); |
0bac71af LR |
2111 | if (!request_wiphy && |
2112 | (last_request->initiator == NL80211_REGDOM_SET_BY_DRIVER || | |
2113 | last_request->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE)) { | |
2114 | schedule_delayed_work(®_timeout, 0); | |
de3584bd JB |
2115 | return -ENODEV; |
2116 | } | |
806a9e39 | 2117 | |
b8295acd | 2118 | if (!last_request->intersect) { |
7db90f4a | 2119 | if (last_request->initiator != NL80211_REGDOM_SET_BY_DRIVER) { |
a042994d | 2120 | reset_regdomains(false); |
3e0c3ff3 LR |
2121 | cfg80211_regdomain = rd; |
2122 | return 0; | |
2123 | } | |
2124 | ||
fb1fc7ad LR |
2125 | /* |
2126 | * For a driver hint, lets copy the regulatory domain the | |
2127 | * driver wanted to the wiphy to deal with conflicts | |
2128 | */ | |
3e0c3ff3 | 2129 | |
558f6d32 LR |
2130 | /* |
2131 | * Userspace could have sent two replies with only | |
2132 | * one kernel request. | |
2133 | */ | |
2134 | if (request_wiphy->regd) | |
2135 | return -EALREADY; | |
3e0c3ff3 | 2136 | |
e9763c3c JB |
2137 | regd = reg_copy_regd(rd); |
2138 | if (IS_ERR(regd)) | |
2139 | return PTR_ERR(regd); | |
3e0c3ff3 | 2140 | |
e9763c3c | 2141 | request_wiphy->regd = regd; |
a042994d | 2142 | reset_regdomains(false); |
b8295acd LR |
2143 | cfg80211_regdomain = rd; |
2144 | return 0; | |
2145 | } | |
2146 | ||
2147 | /* Intersection requires a bit more work */ | |
2148 | ||
7db90f4a | 2149 | if (last_request->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE) { |
9c96477d LR |
2150 | intersected_rd = regdom_intersect(rd, cfg80211_regdomain); |
2151 | if (!intersected_rd) | |
2152 | return -EINVAL; | |
b8295acd | 2153 | |
fb1fc7ad LR |
2154 | /* |
2155 | * We can trash what CRDA provided now. | |
3e0c3ff3 | 2156 | * However if a driver requested this specific regulatory |
fb1fc7ad LR |
2157 | * domain we keep it for its private use |
2158 | */ | |
7db90f4a | 2159 | if (last_request->initiator == NL80211_REGDOM_SET_BY_DRIVER) |
806a9e39 | 2160 | request_wiphy->regd = rd; |
3e0c3ff3 LR |
2161 | else |
2162 | kfree(rd); | |
2163 | ||
b8295acd LR |
2164 | rd = NULL; |
2165 | ||
a042994d | 2166 | reset_regdomains(false); |
b8295acd LR |
2167 | cfg80211_regdomain = intersected_rd; |
2168 | ||
2169 | return 0; | |
9c96477d LR |
2170 | } |
2171 | ||
f3baed51 | 2172 | return -EINVAL; |
b2e1b302 LR |
2173 | } |
2174 | ||
2175 | ||
fb1fc7ad LR |
2176 | /* |
2177 | * Use this call to set the current regulatory domain. Conflicts with | |
b2e1b302 | 2178 | * multiple drivers can be ironed out later. Caller must've already |
fb1fc7ad LR |
2179 | * kmalloc'd the rd structure. Caller must hold cfg80211_mutex |
2180 | */ | |
a3d2eaf0 | 2181 | int set_regdom(const struct ieee80211_regdomain *rd) |
b2e1b302 | 2182 | { |
b2e1b302 LR |
2183 | int r; |
2184 | ||
761cf7ec LR |
2185 | assert_cfg80211_lock(); |
2186 | ||
abc7381b LR |
2187 | mutex_lock(®_mutex); |
2188 | ||
b2e1b302 LR |
2189 | /* Note that this doesn't update the wiphys, this is done below */ |
2190 | r = __set_regdom(rd); | |
d2372b31 | 2191 | if (r) { |
95908535 KV |
2192 | if (r == -EALREADY) |
2193 | reg_set_request_processed(); | |
2194 | ||
d2372b31 | 2195 | kfree(rd); |
fdc9d7b2 | 2196 | goto out; |
d2372b31 | 2197 | } |
b2e1b302 | 2198 | |
b2e1b302 | 2199 | /* This would make this whole thing pointless */ |
fdc9d7b2 JB |
2200 | if (WARN_ON(!last_request->intersect && rd != cfg80211_regdomain)) { |
2201 | r = -EINVAL; | |
2202 | goto out; | |
2203 | } | |
b2e1b302 LR |
2204 | |
2205 | /* update all wiphys now with the new established regulatory domain */ | |
f6037d09 | 2206 | update_all_wiphy_regulatory(last_request->initiator); |
b2e1b302 | 2207 | |
a01ddafd | 2208 | print_regdomain(cfg80211_regdomain); |
b2e1b302 | 2209 | |
73d54c9e LR |
2210 | nl80211_send_reg_change_event(last_request); |
2211 | ||
b2e253cf LR |
2212 | reg_set_request_processed(); |
2213 | ||
fdc9d7b2 | 2214 | out: |
abc7381b LR |
2215 | mutex_unlock(®_mutex); |
2216 | ||
b2e1b302 LR |
2217 | return r; |
2218 | } | |
2219 | ||
4d9d88d1 SJR |
2220 | #ifdef CONFIG_HOTPLUG |
2221 | int reg_device_uevent(struct device *dev, struct kobj_uevent_env *env) | |
2222 | { | |
2223 | if (last_request && !last_request->processed) { | |
2224 | if (add_uevent_var(env, "COUNTRY=%c%c", | |
2225 | last_request->alpha2[0], | |
2226 | last_request->alpha2[1])) | |
2227 | return -ENOMEM; | |
2228 | } | |
2229 | ||
2230 | return 0; | |
2231 | } | |
2232 | #else | |
2233 | int reg_device_uevent(struct device *dev, struct kobj_uevent_env *env) | |
2234 | { | |
2235 | return -ENODEV; | |
2236 | } | |
2237 | #endif /* CONFIG_HOTPLUG */ | |
2238 | ||
57b5ce07 LR |
2239 | void wiphy_regulatory_register(struct wiphy *wiphy) |
2240 | { | |
57b5ce07 LR |
2241 | mutex_lock(®_mutex); |
2242 | ||
2243 | if (!reg_dev_ignore_cell_hint(wiphy)) | |
2244 | reg_num_devs_support_basehint++; | |
2245 | ||
14cdf112 | 2246 | wiphy_update_regulatory(wiphy, NL80211_REGDOM_SET_BY_CORE); |
f8a1c774 | 2247 | |
14cdf112 | 2248 | mutex_unlock(®_mutex); |
57b5ce07 LR |
2249 | } |
2250 | ||
a1794390 | 2251 | /* Caller must hold cfg80211_mutex */ |
bfead080 | 2252 | void wiphy_regulatory_deregister(struct wiphy *wiphy) |
3f2355cb | 2253 | { |
0ad8acaf | 2254 | struct wiphy *request_wiphy = NULL; |
806a9e39 | 2255 | |
abc7381b LR |
2256 | mutex_lock(®_mutex); |
2257 | ||
57b5ce07 LR |
2258 | if (!reg_dev_ignore_cell_hint(wiphy)) |
2259 | reg_num_devs_support_basehint--; | |
2260 | ||
0ef9ccdd CW |
2261 | kfree(wiphy->regd); |
2262 | ||
0ad8acaf LR |
2263 | if (last_request) |
2264 | request_wiphy = wiphy_idx_to_wiphy(last_request->wiphy_idx); | |
806a9e39 | 2265 | |
0ef9ccdd | 2266 | if (!request_wiphy || request_wiphy != wiphy) |
abc7381b | 2267 | goto out; |
0ef9ccdd | 2268 | |
f4173766 | 2269 | last_request->wiphy_idx = WIPHY_IDX_INVALID; |
3f2355cb | 2270 | last_request->country_ie_env = ENVIRON_ANY; |
abc7381b LR |
2271 | out: |
2272 | mutex_unlock(®_mutex); | |
3f2355cb LR |
2273 | } |
2274 | ||
a90c7a31 LR |
2275 | static void reg_timeout_work(struct work_struct *work) |
2276 | { | |
1a919318 | 2277 | REG_DBG_PRINT("Timeout while waiting for CRDA to reply, restoring regulatory settings\n"); |
a90c7a31 LR |
2278 | restore_regulatory_settings(true); |
2279 | } | |
2280 | ||
2fcc9f73 | 2281 | int __init regulatory_init(void) |
b2e1b302 | 2282 | { |
bcf4f99b | 2283 | int err = 0; |
734366de | 2284 | |
b2e1b302 LR |
2285 | reg_pdev = platform_device_register_simple("regulatory", 0, NULL, 0); |
2286 | if (IS_ERR(reg_pdev)) | |
2287 | return PTR_ERR(reg_pdev); | |
734366de | 2288 | |
4d9d88d1 SJR |
2289 | reg_pdev->dev.type = ®_device_type; |
2290 | ||
fe33eb39 | 2291 | spin_lock_init(®_requests_lock); |
e38f8a7a | 2292 | spin_lock_init(®_pending_beacons_lock); |
fe33eb39 | 2293 | |
80007efe LR |
2294 | reg_regdb_size_check(); |
2295 | ||
a3d2eaf0 | 2296 | cfg80211_regdomain = cfg80211_world_regdom; |
734366de | 2297 | |
09d989d1 LR |
2298 | user_alpha2[0] = '9'; |
2299 | user_alpha2[1] = '7'; | |
2300 | ||
ae9e4b0d LR |
2301 | /* We always try to get an update for the static regdomain */ |
2302 | err = regulatory_hint_core(cfg80211_regdomain->alpha2); | |
ba25c141 | 2303 | if (err) { |
bcf4f99b LR |
2304 | if (err == -ENOMEM) |
2305 | return err; | |
2306 | /* | |
2307 | * N.B. kobject_uevent_env() can fail mainly for when we're out | |
2308 | * memory which is handled and propagated appropriately above | |
2309 | * but it can also fail during a netlink_broadcast() or during | |
2310 | * early boot for call_usermodehelper(). For now treat these | |
2311 | * errors as non-fatal. | |
2312 | */ | |
e9c0268f | 2313 | pr_err("kobject_uevent_env() was unable to call CRDA during init\n"); |
bcf4f99b | 2314 | } |
734366de | 2315 | |
ae9e4b0d LR |
2316 | /* |
2317 | * Finally, if the user set the module parameter treat it | |
2318 | * as a user hint. | |
2319 | */ | |
2320 | if (!is_world_regdom(ieee80211_regdom)) | |
57b5ce07 LR |
2321 | regulatory_hint_user(ieee80211_regdom, |
2322 | NL80211_USER_REG_HINT_USER); | |
ae9e4b0d | 2323 | |
b2e1b302 LR |
2324 | return 0; |
2325 | } | |
2326 | ||
1a919318 | 2327 | void regulatory_exit(void) |
b2e1b302 | 2328 | { |
fe33eb39 | 2329 | struct regulatory_request *reg_request, *tmp; |
e38f8a7a | 2330 | struct reg_beacon *reg_beacon, *btmp; |
fe33eb39 LR |
2331 | |
2332 | cancel_work_sync(®_work); | |
a90c7a31 | 2333 | cancel_delayed_work_sync(®_timeout); |
fe33eb39 | 2334 | |
9027b149 | 2335 | /* Lock to suppress warnings */ |
a1794390 | 2336 | mutex_lock(&cfg80211_mutex); |
abc7381b | 2337 | mutex_lock(®_mutex); |
a042994d | 2338 | reset_regdomains(true); |
9027b149 JB |
2339 | mutex_unlock(&cfg80211_mutex); |
2340 | mutex_unlock(®_mutex); | |
734366de | 2341 | |
58ebacc6 | 2342 | dev_set_uevent_suppress(®_pdev->dev, true); |
f6037d09 | 2343 | |
b2e1b302 | 2344 | platform_device_unregister(reg_pdev); |
734366de | 2345 | |
fea9bced JB |
2346 | list_for_each_entry_safe(reg_beacon, btmp, ®_pending_beacons, list) { |
2347 | list_del(®_beacon->list); | |
2348 | kfree(reg_beacon); | |
e38f8a7a | 2349 | } |
e38f8a7a | 2350 | |
fea9bced JB |
2351 | list_for_each_entry_safe(reg_beacon, btmp, ®_beacon_list, list) { |
2352 | list_del(®_beacon->list); | |
2353 | kfree(reg_beacon); | |
e38f8a7a LR |
2354 | } |
2355 | ||
fea9bced JB |
2356 | list_for_each_entry_safe(reg_request, tmp, ®_requests_list, list) { |
2357 | list_del(®_request->list); | |
2358 | kfree(reg_request); | |
fe33eb39 | 2359 | } |
8318d78a | 2360 | } |