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