Commit | Line | Data |
---|---|---|
8318d78a JB |
1 | /* |
2 | * Copyright 2002-2005, Instant802 Networks, Inc. | |
3 | * Copyright 2005-2006, Devicescape Software, Inc. | |
4 | * Copyright 2007 Johannes Berg <johannes@sipsolutions.net> | |
3b77d5ec | 5 | * Copyright 2008-2011 Luis R. Rodriguez <mcgrof@qca.qualcomm.com> |
8318d78a | 6 | * |
3b77d5ec LR |
7 | * Permission to use, copy, modify, and/or distribute this software for any |
8 | * purpose with or without fee is hereby granted, provided that the above | |
9 | * copyright notice and this permission notice appear in all copies. | |
10 | * | |
11 | * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES | |
12 | * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF | |
13 | * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR | |
14 | * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES | |
15 | * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN | |
16 | * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF | |
17 | * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. | |
8318d78a JB |
18 | */ |
19 | ||
3b77d5ec | 20 | |
b2e1b302 LR |
21 | /** |
22 | * DOC: Wireless regulatory infrastructure | |
8318d78a JB |
23 | * |
24 | * The usual implementation is for a driver to read a device EEPROM to | |
25 | * determine which regulatory domain it should be operating under, then | |
26 | * looking up the allowable channels in a driver-local table and finally | |
27 | * registering those channels in the wiphy structure. | |
28 | * | |
b2e1b302 LR |
29 | * Another set of compliance enforcement is for drivers to use their |
30 | * own compliance limits which can be stored on the EEPROM. The host | |
31 | * driver or firmware may ensure these are used. | |
32 | * | |
33 | * In addition to all this we provide an extra layer of regulatory | |
34 | * conformance. For drivers which do not have any regulatory | |
35 | * information CRDA provides the complete regulatory solution. | |
36 | * For others it provides a community effort on further restrictions | |
37 | * to enhance compliance. | |
38 | * | |
39 | * Note: When number of rules --> infinity we will not be able to | |
40 | * index on alpha2 any more, instead we'll probably have to | |
41 | * rely on some SHA1 checksum of the regdomain for example. | |
42 | * | |
8318d78a | 43 | */ |
e9c0268f JP |
44 | |
45 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt | |
46 | ||
8318d78a | 47 | #include <linux/kernel.h> |
bc3b2d7f | 48 | #include <linux/export.h> |
5a0e3ad6 | 49 | #include <linux/slab.h> |
b2e1b302 | 50 | #include <linux/list.h> |
c61029c7 | 51 | #include <linux/ctype.h> |
b2e1b302 LR |
52 | #include <linux/nl80211.h> |
53 | #include <linux/platform_device.h> | |
d9b93842 | 54 | #include <linux/moduleparam.h> |
b2e1b302 | 55 | #include <net/cfg80211.h> |
8318d78a | 56 | #include "core.h" |
b2e1b302 | 57 | #include "reg.h" |
3b377ea9 | 58 | #include "regdb.h" |
73d54c9e | 59 | #include "nl80211.h" |
8318d78a | 60 | |
4113f751 | 61 | #ifdef CONFIG_CFG80211_REG_DEBUG |
12c5ffb5 JP |
62 | #define REG_DBG_PRINT(format, args...) \ |
63 | printk(KERN_DEBUG pr_fmt(format), ##args) | |
4113f751 | 64 | #else |
8271195e | 65 | #define REG_DBG_PRINT(args...) |
4113f751 LR |
66 | #endif |
67 | ||
2f92212b JB |
68 | enum reg_request_treatment { |
69 | REG_REQ_OK, | |
70 | REG_REQ_IGNORE, | |
71 | REG_REQ_INTERSECT, | |
72 | REG_REQ_ALREADY_SET, | |
73 | }; | |
74 | ||
a042994d LR |
75 | static struct regulatory_request core_request_world = { |
76 | .initiator = NL80211_REGDOM_SET_BY_CORE, | |
77 | .alpha2[0] = '0', | |
78 | .alpha2[1] = '0', | |
79 | .intersect = false, | |
80 | .processed = true, | |
81 | .country_ie_env = ENVIRON_ANY, | |
82 | }; | |
83 | ||
5166ccd2 | 84 | /* Receipt of information from last regulatory request */ |
a042994d | 85 | static struct regulatory_request *last_request = &core_request_world; |
734366de | 86 | |
b2e1b302 LR |
87 | /* To trigger userspace events */ |
88 | static struct platform_device *reg_pdev; | |
8318d78a | 89 | |
4d9d88d1 SJR |
90 | static struct device_type reg_device_type = { |
91 | .uevent = reg_device_uevent, | |
92 | }; | |
93 | ||
fb1fc7ad LR |
94 | /* |
95 | * Central wireless core regulatory domains, we only need two, | |
734366de | 96 | * the current one and a world regulatory domain in case we have no |
fb1fc7ad LR |
97 | * information to give us an alpha2 |
98 | */ | |
f130347c | 99 | const struct ieee80211_regdomain *cfg80211_regdomain; |
734366de | 100 | |
abc7381b LR |
101 | /* |
102 | * Protects static reg.c components: | |
103 | * - cfg80211_world_regdom | |
104 | * - cfg80211_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 | { |
942b25cf JB |
188 | /* avoid freeing static information or freeing something twice */ |
189 | if (cfg80211_regdomain == cfg80211_world_regdom) | |
190 | cfg80211_regdomain = NULL; | |
191 | if (cfg80211_world_regdom == &world_regdom) | |
192 | cfg80211_world_regdom = NULL; | |
193 | if (cfg80211_regdomain == &world_regdom) | |
194 | cfg80211_regdomain = NULL; | |
942b25cf JB |
195 | |
196 | kfree(cfg80211_regdomain); | |
197 | kfree(cfg80211_world_regdom); | |
734366de | 198 | |
a3d2eaf0 | 199 | cfg80211_world_regdom = &world_regdom; |
734366de | 200 | cfg80211_regdomain = NULL; |
a042994d LR |
201 | |
202 | if (!full_reset) | |
203 | return; | |
204 | ||
205 | if (last_request != &core_request_world) | |
206 | kfree(last_request); | |
207 | last_request = &core_request_world; | |
734366de JB |
208 | } |
209 | ||
fb1fc7ad LR |
210 | /* |
211 | * Dynamic world regulatory domain requested by the wireless | |
212 | * core upon initialization | |
213 | */ | |
a3d2eaf0 | 214 | static void update_world_regdomain(const struct ieee80211_regdomain *rd) |
734366de | 215 | { |
f6037d09 | 216 | BUG_ON(!last_request); |
734366de | 217 | |
a042994d | 218 | reset_regdomains(false); |
734366de JB |
219 | |
220 | cfg80211_world_regdom = rd; | |
221 | cfg80211_regdomain = rd; | |
222 | } | |
734366de | 223 | |
a3d2eaf0 | 224 | bool is_world_regdom(const char *alpha2) |
b2e1b302 LR |
225 | { |
226 | if (!alpha2) | |
227 | return false; | |
1a919318 | 228 | return alpha2[0] == '0' && alpha2[1] == '0'; |
b2e1b302 | 229 | } |
8318d78a | 230 | |
a3d2eaf0 | 231 | static bool is_alpha2_set(const char *alpha2) |
b2e1b302 LR |
232 | { |
233 | if (!alpha2) | |
234 | return false; | |
1a919318 | 235 | return alpha2[0] && alpha2[1]; |
b2e1b302 | 236 | } |
8318d78a | 237 | |
a3d2eaf0 | 238 | static bool is_unknown_alpha2(const char *alpha2) |
b2e1b302 LR |
239 | { |
240 | if (!alpha2) | |
241 | return false; | |
fb1fc7ad LR |
242 | /* |
243 | * Special case where regulatory domain was built by driver | |
244 | * but a specific alpha2 cannot be determined | |
245 | */ | |
1a919318 | 246 | return alpha2[0] == '9' && alpha2[1] == '9'; |
b2e1b302 | 247 | } |
8318d78a | 248 | |
3f2355cb LR |
249 | static bool is_intersected_alpha2(const char *alpha2) |
250 | { | |
251 | if (!alpha2) | |
252 | return false; | |
fb1fc7ad LR |
253 | /* |
254 | * Special case where regulatory domain is the | |
3f2355cb | 255 | * result of an intersection between two regulatory domain |
fb1fc7ad LR |
256 | * structures |
257 | */ | |
1a919318 | 258 | return alpha2[0] == '9' && alpha2[1] == '8'; |
3f2355cb LR |
259 | } |
260 | ||
a3d2eaf0 | 261 | static bool is_an_alpha2(const char *alpha2) |
b2e1b302 LR |
262 | { |
263 | if (!alpha2) | |
264 | return false; | |
1a919318 | 265 | return isalpha(alpha2[0]) && isalpha(alpha2[1]); |
b2e1b302 | 266 | } |
8318d78a | 267 | |
a3d2eaf0 | 268 | static bool alpha2_equal(const char *alpha2_x, const char *alpha2_y) |
b2e1b302 LR |
269 | { |
270 | if (!alpha2_x || !alpha2_y) | |
271 | return false; | |
1a919318 | 272 | return alpha2_x[0] == alpha2_y[0] && alpha2_x[1] == alpha2_y[1]; |
b2e1b302 LR |
273 | } |
274 | ||
69b1572b | 275 | static bool regdom_changes(const char *alpha2) |
b2e1b302 | 276 | { |
761cf7ec LR |
277 | assert_cfg80211_lock(); |
278 | ||
b2e1b302 LR |
279 | if (!cfg80211_regdomain) |
280 | return true; | |
1a919318 | 281 | return !alpha2_equal(cfg80211_regdomain->alpha2, alpha2); |
b2e1b302 LR |
282 | } |
283 | ||
09d989d1 LR |
284 | /* |
285 | * The NL80211_REGDOM_SET_BY_USER regdom alpha2 is cached, this lets | |
286 | * you know if a valid regulatory hint with NL80211_REGDOM_SET_BY_USER | |
287 | * has ever been issued. | |
288 | */ | |
289 | static bool is_user_regdom_saved(void) | |
290 | { | |
291 | if (user_alpha2[0] == '9' && user_alpha2[1] == '7') | |
292 | return false; | |
293 | ||
294 | /* This would indicate a mistake on the design */ | |
1a919318 | 295 | if (WARN(!is_world_regdom(user_alpha2) && !is_an_alpha2(user_alpha2), |
09d989d1 | 296 | "Unexpected user alpha2: %c%c\n", |
1a919318 | 297 | user_alpha2[0], user_alpha2[1])) |
09d989d1 LR |
298 | return false; |
299 | ||
300 | return true; | |
301 | } | |
302 | ||
e9763c3c JB |
303 | static const struct ieee80211_regdomain * |
304 | reg_copy_regd(const struct ieee80211_regdomain *src_regd) | |
3b377ea9 JL |
305 | { |
306 | struct ieee80211_regdomain *regd; | |
e9763c3c | 307 | int size_of_regd; |
3b377ea9 JL |
308 | unsigned int i; |
309 | ||
82f20856 JB |
310 | size_of_regd = |
311 | sizeof(struct ieee80211_regdomain) + | |
312 | src_regd->n_reg_rules * sizeof(struct ieee80211_reg_rule); | |
3b377ea9 JL |
313 | |
314 | regd = kzalloc(size_of_regd, GFP_KERNEL); | |
315 | if (!regd) | |
e9763c3c | 316 | return ERR_PTR(-ENOMEM); |
3b377ea9 JL |
317 | |
318 | memcpy(regd, src_regd, sizeof(struct ieee80211_regdomain)); | |
319 | ||
320 | for (i = 0; i < src_regd->n_reg_rules; i++) | |
321 | memcpy(®d->reg_rules[i], &src_regd->reg_rules[i], | |
e9763c3c | 322 | sizeof(struct ieee80211_reg_rule)); |
3b377ea9 | 323 | |
e9763c3c | 324 | return regd; |
3b377ea9 JL |
325 | } |
326 | ||
327 | #ifdef CONFIG_CFG80211_INTERNAL_REGDB | |
328 | struct reg_regdb_search_request { | |
329 | char alpha2[2]; | |
330 | struct list_head list; | |
331 | }; | |
332 | ||
333 | static LIST_HEAD(reg_regdb_search_list); | |
368d06f5 | 334 | static DEFINE_MUTEX(reg_regdb_search_mutex); |
3b377ea9 JL |
335 | |
336 | static void reg_regdb_search(struct work_struct *work) | |
337 | { | |
338 | struct reg_regdb_search_request *request; | |
e9763c3c JB |
339 | const struct ieee80211_regdomain *curdom, *regdom = NULL; |
340 | int i; | |
a85d0d7f LR |
341 | |
342 | mutex_lock(&cfg80211_mutex); | |
3b377ea9 | 343 | |
368d06f5 | 344 | mutex_lock(®_regdb_search_mutex); |
3b377ea9 JL |
345 | while (!list_empty(®_regdb_search_list)) { |
346 | request = list_first_entry(®_regdb_search_list, | |
347 | struct reg_regdb_search_request, | |
348 | list); | |
349 | list_del(&request->list); | |
350 | ||
1a919318 | 351 | for (i = 0; i < reg_regdb_size; i++) { |
3b377ea9 JL |
352 | curdom = reg_regdb[i]; |
353 | ||
1a919318 | 354 | if (alpha2_equal(request->alpha2, curdom->alpha2)) { |
e9763c3c | 355 | regdom = reg_copy_regd(curdom); |
3b377ea9 JL |
356 | break; |
357 | } | |
358 | } | |
359 | ||
360 | kfree(request); | |
361 | } | |
368d06f5 | 362 | mutex_unlock(®_regdb_search_mutex); |
a85d0d7f | 363 | |
e9763c3c | 364 | if (!IS_ERR_OR_NULL(regdom)) |
a85d0d7f LR |
365 | set_regdom(regdom); |
366 | ||
367 | mutex_unlock(&cfg80211_mutex); | |
3b377ea9 JL |
368 | } |
369 | ||
370 | static DECLARE_WORK(reg_regdb_work, reg_regdb_search); | |
371 | ||
372 | static void reg_regdb_query(const char *alpha2) | |
373 | { | |
374 | struct reg_regdb_search_request *request; | |
375 | ||
376 | if (!alpha2) | |
377 | return; | |
378 | ||
379 | request = kzalloc(sizeof(struct reg_regdb_search_request), GFP_KERNEL); | |
380 | if (!request) | |
381 | return; | |
382 | ||
383 | memcpy(request->alpha2, alpha2, 2); | |
384 | ||
368d06f5 | 385 | mutex_lock(®_regdb_search_mutex); |
3b377ea9 | 386 | list_add_tail(&request->list, ®_regdb_search_list); |
368d06f5 | 387 | mutex_unlock(®_regdb_search_mutex); |
3b377ea9 JL |
388 | |
389 | schedule_work(®_regdb_work); | |
390 | } | |
80007efe LR |
391 | |
392 | /* Feel free to add any other sanity checks here */ | |
393 | static void reg_regdb_size_check(void) | |
394 | { | |
395 | /* We should ideally BUILD_BUG_ON() but then random builds would fail */ | |
396 | WARN_ONCE(!reg_regdb_size, "db.txt is empty, you should update it..."); | |
397 | } | |
3b377ea9 | 398 | #else |
80007efe | 399 | static inline void reg_regdb_size_check(void) {} |
3b377ea9 JL |
400 | static inline void reg_regdb_query(const char *alpha2) {} |
401 | #endif /* CONFIG_CFG80211_INTERNAL_REGDB */ | |
402 | ||
fb1fc7ad LR |
403 | /* |
404 | * This lets us keep regulatory code which is updated on a regulatory | |
4d9d88d1 SJR |
405 | * basis in userspace. Country information is filled in by |
406 | * reg_device_uevent | |
fb1fc7ad | 407 | */ |
b2e1b302 LR |
408 | static int call_crda(const char *alpha2) |
409 | { | |
b2e1b302 | 410 | if (!is_world_regdom((char *) alpha2)) |
e9c0268f | 411 | pr_info("Calling CRDA for country: %c%c\n", |
b2e1b302 LR |
412 | alpha2[0], alpha2[1]); |
413 | else | |
e9c0268f | 414 | pr_info("Calling CRDA to update world regulatory domain\n"); |
b2e1b302 | 415 | |
3b377ea9 JL |
416 | /* query internal regulatory database (if it exists) */ |
417 | reg_regdb_query(alpha2); | |
418 | ||
4d9d88d1 | 419 | return kobject_uevent(®_pdev->dev.kobj, KOBJ_CHANGE); |
b2e1b302 LR |
420 | } |
421 | ||
b2e1b302 | 422 | /* Used by nl80211 before kmalloc'ing our regulatory domain */ |
a3d2eaf0 | 423 | bool reg_is_valid_request(const char *alpha2) |
b2e1b302 | 424 | { |
61405e97 LR |
425 | assert_cfg80211_lock(); |
426 | ||
f6037d09 JB |
427 | if (!last_request) |
428 | return false; | |
429 | ||
430 | return alpha2_equal(last_request->alpha2, alpha2); | |
b2e1b302 | 431 | } |
8318d78a | 432 | |
b2e1b302 | 433 | /* Sanity check on a regulatory rule */ |
a3d2eaf0 | 434 | static bool is_valid_reg_rule(const struct ieee80211_reg_rule *rule) |
8318d78a | 435 | { |
a3d2eaf0 | 436 | const struct ieee80211_freq_range *freq_range = &rule->freq_range; |
b2e1b302 LR |
437 | u32 freq_diff; |
438 | ||
91e99004 | 439 | if (freq_range->start_freq_khz <= 0 || freq_range->end_freq_khz <= 0) |
b2e1b302 LR |
440 | return false; |
441 | ||
442 | if (freq_range->start_freq_khz > freq_range->end_freq_khz) | |
443 | return false; | |
444 | ||
445 | freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz; | |
446 | ||
bd05f28e | 447 | if (freq_range->end_freq_khz <= freq_range->start_freq_khz || |
1a919318 | 448 | freq_range->max_bandwidth_khz > freq_diff) |
b2e1b302 LR |
449 | return false; |
450 | ||
451 | return true; | |
452 | } | |
453 | ||
a3d2eaf0 | 454 | static bool is_valid_rd(const struct ieee80211_regdomain *rd) |
b2e1b302 | 455 | { |
a3d2eaf0 | 456 | const struct ieee80211_reg_rule *reg_rule = NULL; |
b2e1b302 | 457 | unsigned int i; |
8318d78a | 458 | |
b2e1b302 LR |
459 | if (!rd->n_reg_rules) |
460 | return false; | |
8318d78a | 461 | |
88dc1c3f LR |
462 | if (WARN_ON(rd->n_reg_rules > NL80211_MAX_SUPP_REG_RULES)) |
463 | return false; | |
464 | ||
b2e1b302 LR |
465 | for (i = 0; i < rd->n_reg_rules; i++) { |
466 | reg_rule = &rd->reg_rules[i]; | |
467 | if (!is_valid_reg_rule(reg_rule)) | |
468 | return false; | |
469 | } | |
470 | ||
471 | return true; | |
8318d78a JB |
472 | } |
473 | ||
038659e7 LR |
474 | static bool reg_does_bw_fit(const struct ieee80211_freq_range *freq_range, |
475 | u32 center_freq_khz, | |
476 | u32 bw_khz) | |
b2e1b302 | 477 | { |
038659e7 LR |
478 | u32 start_freq_khz, end_freq_khz; |
479 | ||
480 | start_freq_khz = center_freq_khz - (bw_khz/2); | |
481 | end_freq_khz = center_freq_khz + (bw_khz/2); | |
482 | ||
483 | if (start_freq_khz >= freq_range->start_freq_khz && | |
484 | end_freq_khz <= freq_range->end_freq_khz) | |
485 | return true; | |
486 | ||
487 | return false; | |
b2e1b302 | 488 | } |
8318d78a | 489 | |
0c7dc45d LR |
490 | /** |
491 | * freq_in_rule_band - tells us if a frequency is in a frequency band | |
492 | * @freq_range: frequency rule we want to query | |
493 | * @freq_khz: frequency we are inquiring about | |
494 | * | |
495 | * This lets us know if a specific frequency rule is or is not relevant to | |
496 | * a specific frequency's band. Bands are device specific and artificial | |
64629b9d VK |
497 | * definitions (the "2.4 GHz band", the "5 GHz band" and the "60GHz band"), |
498 | * however it is safe for now to assume that a frequency rule should not be | |
499 | * part of a frequency's band if the start freq or end freq are off by more | |
500 | * than 2 GHz for the 2.4 and 5 GHz bands, and by more than 10 GHz for the | |
501 | * 60 GHz band. | |
0c7dc45d LR |
502 | * This resolution can be lowered and should be considered as we add |
503 | * regulatory rule support for other "bands". | |
504 | **/ | |
505 | static bool freq_in_rule_band(const struct ieee80211_freq_range *freq_range, | |
1a919318 | 506 | u32 freq_khz) |
0c7dc45d LR |
507 | { |
508 | #define ONE_GHZ_IN_KHZ 1000000 | |
64629b9d VK |
509 | /* |
510 | * From 802.11ad: directional multi-gigabit (DMG): | |
511 | * Pertaining to operation in a frequency band containing a channel | |
512 | * with the Channel starting frequency above 45 GHz. | |
513 | */ | |
514 | u32 limit = freq_khz > 45 * ONE_GHZ_IN_KHZ ? | |
515 | 10 * ONE_GHZ_IN_KHZ : 2 * ONE_GHZ_IN_KHZ; | |
516 | if (abs(freq_khz - freq_range->start_freq_khz) <= limit) | |
0c7dc45d | 517 | return true; |
64629b9d | 518 | if (abs(freq_khz - freq_range->end_freq_khz) <= limit) |
0c7dc45d LR |
519 | return true; |
520 | return false; | |
521 | #undef ONE_GHZ_IN_KHZ | |
522 | } | |
523 | ||
fb1fc7ad LR |
524 | /* |
525 | * Helper for regdom_intersect(), this does the real | |
526 | * mathematical intersection fun | |
527 | */ | |
1a919318 JB |
528 | static int reg_rules_intersect(const struct ieee80211_reg_rule *rule1, |
529 | const struct ieee80211_reg_rule *rule2, | |
530 | struct ieee80211_reg_rule *intersected_rule) | |
9c96477d LR |
531 | { |
532 | const struct ieee80211_freq_range *freq_range1, *freq_range2; | |
533 | struct ieee80211_freq_range *freq_range; | |
534 | const struct ieee80211_power_rule *power_rule1, *power_rule2; | |
535 | struct ieee80211_power_rule *power_rule; | |
536 | u32 freq_diff; | |
537 | ||
538 | freq_range1 = &rule1->freq_range; | |
539 | freq_range2 = &rule2->freq_range; | |
540 | freq_range = &intersected_rule->freq_range; | |
541 | ||
542 | power_rule1 = &rule1->power_rule; | |
543 | power_rule2 = &rule2->power_rule; | |
544 | power_rule = &intersected_rule->power_rule; | |
545 | ||
546 | freq_range->start_freq_khz = max(freq_range1->start_freq_khz, | |
1a919318 | 547 | freq_range2->start_freq_khz); |
9c96477d | 548 | freq_range->end_freq_khz = min(freq_range1->end_freq_khz, |
1a919318 | 549 | freq_range2->end_freq_khz); |
9c96477d | 550 | freq_range->max_bandwidth_khz = min(freq_range1->max_bandwidth_khz, |
1a919318 | 551 | freq_range2->max_bandwidth_khz); |
9c96477d LR |
552 | |
553 | freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz; | |
554 | if (freq_range->max_bandwidth_khz > freq_diff) | |
555 | freq_range->max_bandwidth_khz = freq_diff; | |
556 | ||
557 | power_rule->max_eirp = min(power_rule1->max_eirp, | |
558 | power_rule2->max_eirp); | |
559 | power_rule->max_antenna_gain = min(power_rule1->max_antenna_gain, | |
560 | power_rule2->max_antenna_gain); | |
561 | ||
1a919318 | 562 | intersected_rule->flags = rule1->flags | rule2->flags; |
9c96477d LR |
563 | |
564 | if (!is_valid_reg_rule(intersected_rule)) | |
565 | return -EINVAL; | |
566 | ||
567 | return 0; | |
568 | } | |
569 | ||
570 | /** | |
571 | * regdom_intersect - do the intersection between two regulatory domains | |
572 | * @rd1: first regulatory domain | |
573 | * @rd2: second regulatory domain | |
574 | * | |
575 | * Use this function to get the intersection between two regulatory domains. | |
576 | * Once completed we will mark the alpha2 for the rd as intersected, "98", | |
577 | * as no one single alpha2 can represent this regulatory domain. | |
578 | * | |
579 | * Returns a pointer to the regulatory domain structure which will hold the | |
580 | * resulting intersection of rules between rd1 and rd2. We will | |
581 | * kzalloc() this structure for you. | |
582 | */ | |
1a919318 JB |
583 | static struct ieee80211_regdomain * |
584 | regdom_intersect(const struct ieee80211_regdomain *rd1, | |
585 | const struct ieee80211_regdomain *rd2) | |
9c96477d LR |
586 | { |
587 | int r, size_of_regd; | |
588 | unsigned int x, y; | |
589 | unsigned int num_rules = 0, rule_idx = 0; | |
590 | const struct ieee80211_reg_rule *rule1, *rule2; | |
591 | struct ieee80211_reg_rule *intersected_rule; | |
592 | struct ieee80211_regdomain *rd; | |
593 | /* This is just a dummy holder to help us count */ | |
74f53cd8 | 594 | struct ieee80211_reg_rule dummy_rule; |
9c96477d LR |
595 | |
596 | if (!rd1 || !rd2) | |
597 | return NULL; | |
598 | ||
fb1fc7ad LR |
599 | /* |
600 | * First we get a count of the rules we'll need, then we actually | |
9c96477d LR |
601 | * build them. This is to so we can malloc() and free() a |
602 | * regdomain once. The reason we use reg_rules_intersect() here | |
603 | * is it will return -EINVAL if the rule computed makes no sense. | |
fb1fc7ad LR |
604 | * All rules that do check out OK are valid. |
605 | */ | |
9c96477d LR |
606 | |
607 | for (x = 0; x < rd1->n_reg_rules; x++) { | |
608 | rule1 = &rd1->reg_rules[x]; | |
609 | for (y = 0; y < rd2->n_reg_rules; y++) { | |
610 | rule2 = &rd2->reg_rules[y]; | |
74f53cd8 | 611 | if (!reg_rules_intersect(rule1, rule2, &dummy_rule)) |
9c96477d | 612 | num_rules++; |
9c96477d LR |
613 | } |
614 | } | |
615 | ||
616 | if (!num_rules) | |
617 | return NULL; | |
618 | ||
619 | size_of_regd = sizeof(struct ieee80211_regdomain) + | |
82f20856 | 620 | num_rules * sizeof(struct ieee80211_reg_rule); |
9c96477d LR |
621 | |
622 | rd = kzalloc(size_of_regd, GFP_KERNEL); | |
623 | if (!rd) | |
624 | return NULL; | |
625 | ||
8a57fff0 | 626 | for (x = 0; x < rd1->n_reg_rules && rule_idx < num_rules; x++) { |
9c96477d | 627 | rule1 = &rd1->reg_rules[x]; |
8a57fff0 | 628 | for (y = 0; y < rd2->n_reg_rules && rule_idx < num_rules; y++) { |
9c96477d | 629 | rule2 = &rd2->reg_rules[y]; |
fb1fc7ad LR |
630 | /* |
631 | * This time around instead of using the stack lets | |
9c96477d | 632 | * write to the target rule directly saving ourselves |
fb1fc7ad LR |
633 | * a memcpy() |
634 | */ | |
9c96477d | 635 | intersected_rule = &rd->reg_rules[rule_idx]; |
1a919318 | 636 | r = reg_rules_intersect(rule1, rule2, intersected_rule); |
fb1fc7ad LR |
637 | /* |
638 | * No need to memset here the intersected rule here as | |
639 | * we're not using the stack anymore | |
640 | */ | |
9c96477d LR |
641 | if (r) |
642 | continue; | |
643 | rule_idx++; | |
644 | } | |
645 | } | |
646 | ||
647 | if (rule_idx != num_rules) { | |
648 | kfree(rd); | |
649 | return NULL; | |
650 | } | |
651 | ||
652 | rd->n_reg_rules = num_rules; | |
653 | rd->alpha2[0] = '9'; | |
654 | rd->alpha2[1] = '8'; | |
655 | ||
656 | return rd; | |
657 | } | |
658 | ||
fb1fc7ad LR |
659 | /* |
660 | * XXX: add support for the rest of enum nl80211_reg_rule_flags, we may | |
661 | * want to just have the channel structure use these | |
662 | */ | |
b2e1b302 LR |
663 | static u32 map_regdom_flags(u32 rd_flags) |
664 | { | |
665 | u32 channel_flags = 0; | |
666 | if (rd_flags & NL80211_RRF_PASSIVE_SCAN) | |
667 | channel_flags |= IEEE80211_CHAN_PASSIVE_SCAN; | |
668 | if (rd_flags & NL80211_RRF_NO_IBSS) | |
669 | channel_flags |= IEEE80211_CHAN_NO_IBSS; | |
670 | if (rd_flags & NL80211_RRF_DFS) | |
671 | channel_flags |= IEEE80211_CHAN_RADAR; | |
03f6b084 SF |
672 | if (rd_flags & NL80211_RRF_NO_OFDM) |
673 | channel_flags |= IEEE80211_CHAN_NO_OFDM; | |
b2e1b302 LR |
674 | return channel_flags; |
675 | } | |
676 | ||
1fa25e41 LR |
677 | static int freq_reg_info_regd(struct wiphy *wiphy, |
678 | u32 center_freq, | |
038659e7 | 679 | u32 desired_bw_khz, |
1fa25e41 LR |
680 | const struct ieee80211_reg_rule **reg_rule, |
681 | const struct ieee80211_regdomain *custom_regd) | |
8318d78a JB |
682 | { |
683 | int i; | |
0c7dc45d | 684 | bool band_rule_found = false; |
3e0c3ff3 | 685 | const struct ieee80211_regdomain *regd; |
038659e7 LR |
686 | bool bw_fits = false; |
687 | ||
688 | if (!desired_bw_khz) | |
689 | desired_bw_khz = MHZ_TO_KHZ(20); | |
8318d78a | 690 | |
1fa25e41 | 691 | regd = custom_regd ? custom_regd : cfg80211_regdomain; |
3e0c3ff3 | 692 | |
fb1fc7ad LR |
693 | /* |
694 | * Follow the driver's regulatory domain, if present, unless a country | |
695 | * IE has been processed or a user wants to help complaince further | |
696 | */ | |
2784fe91 LR |
697 | if (!custom_regd && |
698 | last_request->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && | |
7db90f4a | 699 | last_request->initiator != NL80211_REGDOM_SET_BY_USER && |
3e0c3ff3 LR |
700 | wiphy->regd) |
701 | regd = wiphy->regd; | |
702 | ||
703 | if (!regd) | |
b2e1b302 LR |
704 | return -EINVAL; |
705 | ||
3e0c3ff3 | 706 | for (i = 0; i < regd->n_reg_rules; i++) { |
b2e1b302 LR |
707 | const struct ieee80211_reg_rule *rr; |
708 | const struct ieee80211_freq_range *fr = NULL; | |
b2e1b302 | 709 | |
3e0c3ff3 | 710 | rr = ®d->reg_rules[i]; |
b2e1b302 | 711 | fr = &rr->freq_range; |
0c7dc45d | 712 | |
fb1fc7ad LR |
713 | /* |
714 | * We only need to know if one frequency rule was | |
0c7dc45d | 715 | * was in center_freq's band, that's enough, so lets |
fb1fc7ad LR |
716 | * not overwrite it once found |
717 | */ | |
0c7dc45d LR |
718 | if (!band_rule_found) |
719 | band_rule_found = freq_in_rule_band(fr, center_freq); | |
720 | ||
1a919318 | 721 | bw_fits = reg_does_bw_fit(fr, center_freq, desired_bw_khz); |
0c7dc45d | 722 | |
038659e7 | 723 | if (band_rule_found && bw_fits) { |
b2e1b302 | 724 | *reg_rule = rr; |
038659e7 | 725 | return 0; |
8318d78a JB |
726 | } |
727 | } | |
728 | ||
0c7dc45d LR |
729 | if (!band_rule_found) |
730 | return -ERANGE; | |
731 | ||
038659e7 | 732 | return -EINVAL; |
b2e1b302 LR |
733 | } |
734 | ||
1a919318 | 735 | int freq_reg_info(struct wiphy *wiphy, u32 center_freq, u32 desired_bw_khz, |
038659e7 | 736 | const struct ieee80211_reg_rule **reg_rule) |
1fa25e41 | 737 | { |
ac46d48e | 738 | assert_cfg80211_lock(); |
1a919318 JB |
739 | |
740 | return freq_reg_info_regd(wiphy, center_freq, desired_bw_khz, | |
741 | reg_rule, NULL); | |
1fa25e41 | 742 | } |
4f366c5d | 743 | EXPORT_SYMBOL(freq_reg_info); |
b2e1b302 | 744 | |
926a0a09 LR |
745 | #ifdef CONFIG_CFG80211_REG_DEBUG |
746 | static const char *reg_initiator_name(enum nl80211_reg_initiator initiator) | |
747 | { | |
748 | switch (initiator) { | |
749 | case NL80211_REGDOM_SET_BY_CORE: | |
750 | return "Set by core"; | |
751 | case NL80211_REGDOM_SET_BY_USER: | |
752 | return "Set by user"; | |
753 | case NL80211_REGDOM_SET_BY_DRIVER: | |
754 | return "Set by driver"; | |
755 | case NL80211_REGDOM_SET_BY_COUNTRY_IE: | |
756 | return "Set by country IE"; | |
757 | default: | |
758 | WARN_ON(1); | |
759 | return "Set by bug"; | |
760 | } | |
761 | } | |
e702d3cf LR |
762 | |
763 | static void chan_reg_rule_print_dbg(struct ieee80211_channel *chan, | |
764 | u32 desired_bw_khz, | |
765 | const struct ieee80211_reg_rule *reg_rule) | |
766 | { | |
767 | const struct ieee80211_power_rule *power_rule; | |
768 | const struct ieee80211_freq_range *freq_range; | |
769 | char max_antenna_gain[32]; | |
770 | ||
771 | power_rule = ®_rule->power_rule; | |
772 | freq_range = ®_rule->freq_range; | |
773 | ||
774 | if (!power_rule->max_antenna_gain) | |
775 | snprintf(max_antenna_gain, 32, "N/A"); | |
776 | else | |
777 | snprintf(max_antenna_gain, 32, "%d", power_rule->max_antenna_gain); | |
778 | ||
1a919318 JB |
779 | REG_DBG_PRINT("Updating information on frequency %d MHz for a %d MHz width channel with regulatory rule:\n", |
780 | chan->center_freq, KHZ_TO_MHZ(desired_bw_khz)); | |
e702d3cf | 781 | |
56e6786e | 782 | REG_DBG_PRINT("%d KHz - %d KHz @ %d KHz), (%s mBi, %d mBm)\n", |
1a919318 JB |
783 | freq_range->start_freq_khz, freq_range->end_freq_khz, |
784 | freq_range->max_bandwidth_khz, max_antenna_gain, | |
e702d3cf LR |
785 | power_rule->max_eirp); |
786 | } | |
787 | #else | |
788 | static void chan_reg_rule_print_dbg(struct ieee80211_channel *chan, | |
789 | u32 desired_bw_khz, | |
790 | const struct ieee80211_reg_rule *reg_rule) | |
791 | { | |
792 | return; | |
793 | } | |
926a0a09 LR |
794 | #endif |
795 | ||
038659e7 LR |
796 | /* |
797 | * Note that right now we assume the desired channel bandwidth | |
798 | * is always 20 MHz for each individual channel (HT40 uses 20 MHz | |
799 | * per channel, the primary and the extension channel). To support | |
800 | * smaller custom bandwidths such as 5 MHz or 10 MHz we'll need a | |
801 | * new ieee80211_channel.target_bw and re run the regulatory check | |
802 | * on the wiphy with the target_bw specified. Then we can simply use | |
803 | * that below for the desired_bw_khz below. | |
804 | */ | |
7ca43d03 LR |
805 | static void handle_channel(struct wiphy *wiphy, |
806 | enum nl80211_reg_initiator initiator, | |
807 | enum ieee80211_band band, | |
a92a3ce7 | 808 | unsigned int chan_idx) |
b2e1b302 LR |
809 | { |
810 | int r; | |
038659e7 LR |
811 | u32 flags, bw_flags = 0; |
812 | u32 desired_bw_khz = MHZ_TO_KHZ(20); | |
b2e1b302 LR |
813 | const struct ieee80211_reg_rule *reg_rule = NULL; |
814 | const struct ieee80211_power_rule *power_rule = NULL; | |
038659e7 | 815 | const struct ieee80211_freq_range *freq_range = NULL; |
a92a3ce7 LR |
816 | struct ieee80211_supported_band *sband; |
817 | struct ieee80211_channel *chan; | |
fe33eb39 | 818 | struct wiphy *request_wiphy = NULL; |
a92a3ce7 | 819 | |
761cf7ec LR |
820 | assert_cfg80211_lock(); |
821 | ||
806a9e39 LR |
822 | request_wiphy = wiphy_idx_to_wiphy(last_request->wiphy_idx); |
823 | ||
a92a3ce7 LR |
824 | sband = wiphy->bands[band]; |
825 | BUG_ON(chan_idx >= sband->n_channels); | |
826 | chan = &sband->channels[chan_idx]; | |
827 | ||
828 | flags = chan->orig_flags; | |
b2e1b302 | 829 | |
1a919318 JB |
830 | r = freq_reg_info(wiphy, MHZ_TO_KHZ(chan->center_freq), |
831 | desired_bw_khz, ®_rule); | |
ca4ffe8f LR |
832 | if (r) { |
833 | /* | |
834 | * We will disable all channels that do not match our | |
25985edc | 835 | * received regulatory rule unless the hint is coming |
ca4ffe8f LR |
836 | * from a Country IE and the Country IE had no information |
837 | * about a band. The IEEE 802.11 spec allows for an AP | |
838 | * to send only a subset of the regulatory rules allowed, | |
839 | * so an AP in the US that only supports 2.4 GHz may only send | |
840 | * a country IE with information for the 2.4 GHz band | |
841 | * while 5 GHz is still supported. | |
842 | */ | |
843 | if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE && | |
844 | r == -ERANGE) | |
845 | return; | |
846 | ||
d91e41b6 | 847 | REG_DBG_PRINT("Disabling freq %d MHz\n", chan->center_freq); |
ca4ffe8f | 848 | chan->flags = IEEE80211_CHAN_DISABLED; |
8318d78a | 849 | return; |
ca4ffe8f | 850 | } |
8318d78a | 851 | |
e702d3cf LR |
852 | chan_reg_rule_print_dbg(chan, desired_bw_khz, reg_rule); |
853 | ||
b2e1b302 | 854 | power_rule = ®_rule->power_rule; |
038659e7 LR |
855 | freq_range = ®_rule->freq_range; |
856 | ||
857 | if (freq_range->max_bandwidth_khz < MHZ_TO_KHZ(40)) | |
858 | bw_flags = IEEE80211_CHAN_NO_HT40; | |
b2e1b302 | 859 | |
7db90f4a | 860 | if (last_request->initiator == NL80211_REGDOM_SET_BY_DRIVER && |
806a9e39 | 861 | request_wiphy && request_wiphy == wiphy && |
5be83de5 | 862 | request_wiphy->flags & WIPHY_FLAG_STRICT_REGULATORY) { |
fb1fc7ad | 863 | /* |
25985edc | 864 | * This guarantees the driver's requested regulatory domain |
f976376d | 865 | * will always be used as a base for further regulatory |
fb1fc7ad LR |
866 | * settings |
867 | */ | |
f976376d | 868 | chan->flags = chan->orig_flags = |
038659e7 | 869 | map_regdom_flags(reg_rule->flags) | bw_flags; |
f976376d LR |
870 | chan->max_antenna_gain = chan->orig_mag = |
871 | (int) MBI_TO_DBI(power_rule->max_antenna_gain); | |
279f0f55 | 872 | chan->max_reg_power = chan->max_power = chan->orig_mpwr = |
f976376d LR |
873 | (int) MBM_TO_DBM(power_rule->max_eirp); |
874 | return; | |
875 | } | |
876 | ||
aa3d7eef | 877 | chan->beacon_found = false; |
038659e7 | 878 | chan->flags = flags | bw_flags | map_regdom_flags(reg_rule->flags); |
1a919318 JB |
879 | chan->max_antenna_gain = |
880 | min_t(int, chan->orig_mag, | |
881 | MBI_TO_DBI(power_rule->max_antenna_gain)); | |
eccc068e | 882 | chan->max_reg_power = (int) MBM_TO_DBM(power_rule->max_eirp); |
5e31fc08 SG |
883 | if (chan->orig_mpwr) { |
884 | /* | |
885 | * Devices that have their own custom regulatory domain | |
886 | * but also use WIPHY_FLAG_STRICT_REGULATORY will follow the | |
887 | * passed country IE power settings. | |
888 | */ | |
889 | if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE && | |
890 | wiphy->flags & WIPHY_FLAG_CUSTOM_REGULATORY && | |
891 | wiphy->flags & WIPHY_FLAG_STRICT_REGULATORY) | |
892 | chan->max_power = chan->max_reg_power; | |
893 | else | |
894 | chan->max_power = min(chan->orig_mpwr, | |
895 | chan->max_reg_power); | |
896 | } else | |
897 | chan->max_power = chan->max_reg_power; | |
8318d78a JB |
898 | } |
899 | ||
1a919318 | 900 | static void handle_band(struct wiphy *wiphy, enum ieee80211_band band, |
7ca43d03 | 901 | enum nl80211_reg_initiator initiator) |
8318d78a | 902 | { |
a92a3ce7 LR |
903 | unsigned int i; |
904 | struct ieee80211_supported_band *sband; | |
905 | ||
906 | BUG_ON(!wiphy->bands[band]); | |
907 | sband = wiphy->bands[band]; | |
8318d78a JB |
908 | |
909 | for (i = 0; i < sband->n_channels; i++) | |
7ca43d03 | 910 | handle_channel(wiphy, initiator, band, i); |
8318d78a JB |
911 | } |
912 | ||
57b5ce07 LR |
913 | static bool reg_request_cell_base(struct regulatory_request *request) |
914 | { | |
915 | if (request->initiator != NL80211_REGDOM_SET_BY_USER) | |
916 | return false; | |
1a919318 | 917 | return request->user_reg_hint_type == NL80211_USER_REG_HINT_CELL_BASE; |
57b5ce07 LR |
918 | } |
919 | ||
920 | bool reg_last_request_cell_base(void) | |
921 | { | |
ebd0fd2b | 922 | bool val; |
1a919318 | 923 | |
57b5ce07 LR |
924 | assert_cfg80211_lock(); |
925 | ||
926 | mutex_lock(®_mutex); | |
ebd0fd2b | 927 | val = reg_request_cell_base(last_request); |
57b5ce07 | 928 | mutex_unlock(®_mutex); |
1a919318 | 929 | |
ebd0fd2b | 930 | return val; |
57b5ce07 LR |
931 | } |
932 | ||
933 | #ifdef CONFIG_CFG80211_CERTIFICATION_ONUS | |
57b5ce07 | 934 | /* Core specific check */ |
2f92212b JB |
935 | static enum reg_request_treatment |
936 | reg_ignore_cell_hint(struct regulatory_request *pending_request) | |
57b5ce07 LR |
937 | { |
938 | if (!reg_num_devs_support_basehint) | |
2f92212b | 939 | return REG_REQ_IGNORE; |
57b5ce07 | 940 | |
1a919318 JB |
941 | if (reg_request_cell_base(last_request) && |
942 | !regdom_changes(pending_request->alpha2)) | |
2f92212b | 943 | return REG_REQ_ALREADY_SET; |
1a919318 | 944 | |
2f92212b | 945 | return REG_REQ_OK; |
57b5ce07 LR |
946 | } |
947 | ||
948 | /* Device specific check */ | |
949 | static bool reg_dev_ignore_cell_hint(struct wiphy *wiphy) | |
950 | { | |
1a919318 | 951 | return !(wiphy->features & NL80211_FEATURE_CELL_BASE_REG_HINTS); |
57b5ce07 LR |
952 | } |
953 | #else | |
954 | static int reg_ignore_cell_hint(struct regulatory_request *pending_request) | |
955 | { | |
2f92212b | 956 | return REG_REQ_IGNORE; |
57b5ce07 | 957 | } |
1a919318 JB |
958 | |
959 | static bool reg_dev_ignore_cell_hint(struct wiphy *wiphy) | |
57b5ce07 LR |
960 | { |
961 | return true; | |
962 | } | |
963 | #endif | |
964 | ||
965 | ||
7db90f4a LR |
966 | static bool ignore_reg_update(struct wiphy *wiphy, |
967 | enum nl80211_reg_initiator initiator) | |
14b9815a | 968 | { |
926a0a09 | 969 | if (!last_request) { |
1a919318 | 970 | REG_DBG_PRINT("Ignoring regulatory request %s since last_request is not set\n", |
926a0a09 | 971 | reg_initiator_name(initiator)); |
14b9815a | 972 | return true; |
926a0a09 LR |
973 | } |
974 | ||
7db90f4a | 975 | if (initiator == NL80211_REGDOM_SET_BY_CORE && |
926a0a09 | 976 | wiphy->flags & WIPHY_FLAG_CUSTOM_REGULATORY) { |
1a919318 | 977 | REG_DBG_PRINT("Ignoring regulatory request %s since the driver uses its own custom regulatory domain\n", |
926a0a09 | 978 | reg_initiator_name(initiator)); |
14b9815a | 979 | return true; |
926a0a09 LR |
980 | } |
981 | ||
fb1fc7ad LR |
982 | /* |
983 | * wiphy->regd will be set once the device has its own | |
984 | * desired regulatory domain set | |
985 | */ | |
5be83de5 | 986 | if (wiphy->flags & WIPHY_FLAG_STRICT_REGULATORY && !wiphy->regd && |
749b527b | 987 | initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && |
926a0a09 | 988 | !is_world_regdom(last_request->alpha2)) { |
1a919318 | 989 | REG_DBG_PRINT("Ignoring regulatory request %s since the driver requires its own regulatory domain to be set first\n", |
926a0a09 | 990 | reg_initiator_name(initiator)); |
14b9815a | 991 | return true; |
926a0a09 LR |
992 | } |
993 | ||
57b5ce07 LR |
994 | if (reg_request_cell_base(last_request)) |
995 | return reg_dev_ignore_cell_hint(wiphy); | |
996 | ||
14b9815a LR |
997 | return false; |
998 | } | |
999 | ||
1a919318 | 1000 | static void handle_reg_beacon(struct wiphy *wiphy, unsigned int chan_idx, |
e38f8a7a LR |
1001 | struct reg_beacon *reg_beacon) |
1002 | { | |
e38f8a7a LR |
1003 | struct ieee80211_supported_band *sband; |
1004 | struct ieee80211_channel *chan; | |
6bad8766 LR |
1005 | bool channel_changed = false; |
1006 | struct ieee80211_channel chan_before; | |
e38f8a7a LR |
1007 | |
1008 | assert_cfg80211_lock(); | |
1009 | ||
1010 | sband = wiphy->bands[reg_beacon->chan.band]; | |
1011 | chan = &sband->channels[chan_idx]; | |
1012 | ||
1013 | if (likely(chan->center_freq != reg_beacon->chan.center_freq)) | |
1014 | return; | |
1015 | ||
6bad8766 LR |
1016 | if (chan->beacon_found) |
1017 | return; | |
1018 | ||
1019 | chan->beacon_found = true; | |
1020 | ||
5be83de5 | 1021 | if (wiphy->flags & WIPHY_FLAG_DISABLE_BEACON_HINTS) |
37184244 LR |
1022 | return; |
1023 | ||
6bad8766 LR |
1024 | chan_before.center_freq = chan->center_freq; |
1025 | chan_before.flags = chan->flags; | |
1026 | ||
37184244 | 1027 | if (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN) { |
e38f8a7a | 1028 | chan->flags &= ~IEEE80211_CHAN_PASSIVE_SCAN; |
6bad8766 | 1029 | channel_changed = true; |
e38f8a7a LR |
1030 | } |
1031 | ||
37184244 | 1032 | if (chan->flags & IEEE80211_CHAN_NO_IBSS) { |
e38f8a7a | 1033 | chan->flags &= ~IEEE80211_CHAN_NO_IBSS; |
6bad8766 | 1034 | channel_changed = true; |
e38f8a7a LR |
1035 | } |
1036 | ||
6bad8766 LR |
1037 | if (channel_changed) |
1038 | nl80211_send_beacon_hint_event(wiphy, &chan_before, chan); | |
e38f8a7a LR |
1039 | } |
1040 | ||
1041 | /* | |
1042 | * Called when a scan on a wiphy finds a beacon on | |
1043 | * new channel | |
1044 | */ | |
1045 | static void wiphy_update_new_beacon(struct wiphy *wiphy, | |
1046 | struct reg_beacon *reg_beacon) | |
1047 | { | |
1048 | unsigned int i; | |
1049 | struct ieee80211_supported_band *sband; | |
1050 | ||
1051 | assert_cfg80211_lock(); | |
1052 | ||
1053 | if (!wiphy->bands[reg_beacon->chan.band]) | |
1054 | return; | |
1055 | ||
1056 | sband = wiphy->bands[reg_beacon->chan.band]; | |
1057 | ||
1058 | for (i = 0; i < sband->n_channels; i++) | |
1059 | handle_reg_beacon(wiphy, i, reg_beacon); | |
1060 | } | |
1061 | ||
1062 | /* | |
1063 | * Called upon reg changes or a new wiphy is added | |
1064 | */ | |
1065 | static void wiphy_update_beacon_reg(struct wiphy *wiphy) | |
1066 | { | |
1067 | unsigned int i; | |
1068 | struct ieee80211_supported_band *sband; | |
1069 | struct reg_beacon *reg_beacon; | |
1070 | ||
1071 | assert_cfg80211_lock(); | |
1072 | ||
e38f8a7a LR |
1073 | list_for_each_entry(reg_beacon, ®_beacon_list, list) { |
1074 | if (!wiphy->bands[reg_beacon->chan.band]) | |
1075 | continue; | |
1076 | sband = wiphy->bands[reg_beacon->chan.band]; | |
1077 | for (i = 0; i < sband->n_channels; i++) | |
1078 | handle_reg_beacon(wiphy, i, reg_beacon); | |
1079 | } | |
1080 | } | |
1081 | ||
1082 | static bool reg_is_world_roaming(struct wiphy *wiphy) | |
1083 | { | |
1084 | if (is_world_regdom(cfg80211_regdomain->alpha2) || | |
1085 | (wiphy->regd && is_world_regdom(wiphy->regd->alpha2))) | |
1086 | return true; | |
b1ed8ddd LR |
1087 | if (last_request && |
1088 | last_request->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && | |
5be83de5 | 1089 | wiphy->flags & WIPHY_FLAG_CUSTOM_REGULATORY) |
e38f8a7a LR |
1090 | return true; |
1091 | return false; | |
1092 | } | |
1093 | ||
1094 | /* Reap the advantages of previously found beacons */ | |
1095 | static void reg_process_beacons(struct wiphy *wiphy) | |
1096 | { | |
b1ed8ddd LR |
1097 | /* |
1098 | * Means we are just firing up cfg80211, so no beacons would | |
1099 | * have been processed yet. | |
1100 | */ | |
1101 | if (!last_request) | |
1102 | return; | |
e38f8a7a LR |
1103 | if (!reg_is_world_roaming(wiphy)) |
1104 | return; | |
1105 | wiphy_update_beacon_reg(wiphy); | |
1106 | } | |
1107 | ||
1a919318 | 1108 | static bool is_ht40_allowed(struct ieee80211_channel *chan) |
038659e7 LR |
1109 | { |
1110 | if (!chan) | |
1a919318 | 1111 | return false; |
038659e7 | 1112 | if (chan->flags & IEEE80211_CHAN_DISABLED) |
1a919318 | 1113 | return false; |
038659e7 | 1114 | /* This would happen when regulatory rules disallow HT40 completely */ |
1a919318 | 1115 | return !(chan->flags & IEEE80211_CHAN_NO_HT40); |
038659e7 LR |
1116 | } |
1117 | ||
1118 | static void reg_process_ht_flags_channel(struct wiphy *wiphy, | |
1119 | enum ieee80211_band band, | |
1120 | unsigned int chan_idx) | |
1121 | { | |
1122 | struct ieee80211_supported_band *sband; | |
1123 | struct ieee80211_channel *channel; | |
1124 | struct ieee80211_channel *channel_before = NULL, *channel_after = NULL; | |
1125 | unsigned int i; | |
1126 | ||
1127 | assert_cfg80211_lock(); | |
1128 | ||
1129 | sband = wiphy->bands[band]; | |
1130 | BUG_ON(chan_idx >= sband->n_channels); | |
1131 | channel = &sband->channels[chan_idx]; | |
1132 | ||
1a919318 | 1133 | if (!is_ht40_allowed(channel)) { |
038659e7 LR |
1134 | channel->flags |= IEEE80211_CHAN_NO_HT40; |
1135 | return; | |
1136 | } | |
1137 | ||
1138 | /* | |
1139 | * We need to ensure the extension channels exist to | |
1140 | * be able to use HT40- or HT40+, this finds them (or not) | |
1141 | */ | |
1142 | for (i = 0; i < sband->n_channels; i++) { | |
1143 | struct ieee80211_channel *c = &sband->channels[i]; | |
1a919318 | 1144 | |
038659e7 LR |
1145 | if (c->center_freq == (channel->center_freq - 20)) |
1146 | channel_before = c; | |
1147 | if (c->center_freq == (channel->center_freq + 20)) | |
1148 | channel_after = c; | |
1149 | } | |
1150 | ||
1151 | /* | |
1152 | * Please note that this assumes target bandwidth is 20 MHz, | |
1153 | * if that ever changes we also need to change the below logic | |
1154 | * to include that as well. | |
1155 | */ | |
1a919318 | 1156 | if (!is_ht40_allowed(channel_before)) |
689da1b3 | 1157 | channel->flags |= IEEE80211_CHAN_NO_HT40MINUS; |
038659e7 | 1158 | else |
689da1b3 | 1159 | channel->flags &= ~IEEE80211_CHAN_NO_HT40MINUS; |
038659e7 | 1160 | |
1a919318 | 1161 | if (!is_ht40_allowed(channel_after)) |
689da1b3 | 1162 | channel->flags |= IEEE80211_CHAN_NO_HT40PLUS; |
038659e7 | 1163 | else |
689da1b3 | 1164 | channel->flags &= ~IEEE80211_CHAN_NO_HT40PLUS; |
038659e7 LR |
1165 | } |
1166 | ||
1167 | static void reg_process_ht_flags_band(struct wiphy *wiphy, | |
1168 | enum ieee80211_band band) | |
1169 | { | |
1170 | unsigned int i; | |
1171 | struct ieee80211_supported_band *sband; | |
1172 | ||
1173 | BUG_ON(!wiphy->bands[band]); | |
1174 | sband = wiphy->bands[band]; | |
1175 | ||
1176 | for (i = 0; i < sband->n_channels; i++) | |
1177 | reg_process_ht_flags_channel(wiphy, band, i); | |
1178 | } | |
1179 | ||
1180 | static void reg_process_ht_flags(struct wiphy *wiphy) | |
1181 | { | |
1182 | enum ieee80211_band band; | |
1183 | ||
1184 | if (!wiphy) | |
1185 | return; | |
1186 | ||
1187 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) { | |
1188 | if (wiphy->bands[band]) | |
1189 | reg_process_ht_flags_band(wiphy, band); | |
1190 | } | |
1191 | ||
1192 | } | |
1193 | ||
eac03e38 SN |
1194 | static void wiphy_update_regulatory(struct wiphy *wiphy, |
1195 | enum nl80211_reg_initiator initiator) | |
b2e1b302 LR |
1196 | { |
1197 | enum ieee80211_band band; | |
d46e5b1d | 1198 | |
eac03e38 SN |
1199 | assert_reg_lock(); |
1200 | ||
7db90f4a | 1201 | if (ignore_reg_update(wiphy, initiator)) |
a203c2aa SN |
1202 | return; |
1203 | ||
b68e6b3b LR |
1204 | last_request->dfs_region = cfg80211_regdomain->dfs_region; |
1205 | ||
b2e1b302 | 1206 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) { |
8318d78a | 1207 | if (wiphy->bands[band]) |
7ca43d03 | 1208 | handle_band(wiphy, band, initiator); |
b2e1b302 | 1209 | } |
a203c2aa | 1210 | |
e38f8a7a | 1211 | reg_process_beacons(wiphy); |
038659e7 | 1212 | reg_process_ht_flags(wiphy); |
1a919318 | 1213 | |
560e28e1 | 1214 | if (wiphy->reg_notifier) |
716f9392 | 1215 | wiphy->reg_notifier(wiphy, last_request); |
b2e1b302 LR |
1216 | } |
1217 | ||
d7549cbb SN |
1218 | static void update_all_wiphy_regulatory(enum nl80211_reg_initiator initiator) |
1219 | { | |
1220 | struct cfg80211_registered_device *rdev; | |
4a38994f | 1221 | struct wiphy *wiphy; |
d7549cbb | 1222 | |
4a38994f RM |
1223 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) { |
1224 | wiphy = &rdev->wiphy; | |
1225 | wiphy_update_regulatory(wiphy, initiator); | |
1226 | /* | |
1227 | * Regulatory updates set by CORE are ignored for custom | |
1228 | * regulatory cards. Let us notify the changes to the driver, | |
1229 | * as some drivers used this to restore its orig_* reg domain. | |
1230 | */ | |
1231 | if (initiator == NL80211_REGDOM_SET_BY_CORE && | |
1232 | wiphy->flags & WIPHY_FLAG_CUSTOM_REGULATORY && | |
1233 | wiphy->reg_notifier) | |
1234 | wiphy->reg_notifier(wiphy, last_request); | |
1235 | } | |
d7549cbb SN |
1236 | } |
1237 | ||
1fa25e41 LR |
1238 | static void handle_channel_custom(struct wiphy *wiphy, |
1239 | enum ieee80211_band band, | |
1240 | unsigned int chan_idx, | |
1241 | const struct ieee80211_regdomain *regd) | |
1242 | { | |
1243 | int r; | |
038659e7 LR |
1244 | u32 desired_bw_khz = MHZ_TO_KHZ(20); |
1245 | u32 bw_flags = 0; | |
1fa25e41 LR |
1246 | const struct ieee80211_reg_rule *reg_rule = NULL; |
1247 | const struct ieee80211_power_rule *power_rule = NULL; | |
038659e7 | 1248 | const struct ieee80211_freq_range *freq_range = NULL; |
1fa25e41 LR |
1249 | struct ieee80211_supported_band *sband; |
1250 | struct ieee80211_channel *chan; | |
1251 | ||
abc7381b | 1252 | assert_reg_lock(); |
ac46d48e | 1253 | |
1fa25e41 LR |
1254 | sband = wiphy->bands[band]; |
1255 | BUG_ON(chan_idx >= sband->n_channels); | |
1256 | chan = &sband->channels[chan_idx]; | |
1257 | ||
1a919318 JB |
1258 | r = freq_reg_info_regd(wiphy, MHZ_TO_KHZ(chan->center_freq), |
1259 | desired_bw_khz, ®_rule, regd); | |
1fa25e41 LR |
1260 | |
1261 | if (r) { | |
1a919318 JB |
1262 | REG_DBG_PRINT("Disabling freq %d MHz as custom regd has no rule that fits a %d MHz wide channel\n", |
1263 | chan->center_freq, KHZ_TO_MHZ(desired_bw_khz)); | |
1fa25e41 LR |
1264 | chan->flags = IEEE80211_CHAN_DISABLED; |
1265 | return; | |
1266 | } | |
1267 | ||
e702d3cf LR |
1268 | chan_reg_rule_print_dbg(chan, desired_bw_khz, reg_rule); |
1269 | ||
1fa25e41 | 1270 | power_rule = ®_rule->power_rule; |
038659e7 LR |
1271 | freq_range = ®_rule->freq_range; |
1272 | ||
1273 | if (freq_range->max_bandwidth_khz < MHZ_TO_KHZ(40)) | |
1274 | bw_flags = IEEE80211_CHAN_NO_HT40; | |
1fa25e41 | 1275 | |
038659e7 | 1276 | chan->flags |= map_regdom_flags(reg_rule->flags) | bw_flags; |
1fa25e41 | 1277 | chan->max_antenna_gain = (int) MBI_TO_DBI(power_rule->max_antenna_gain); |
279f0f55 FF |
1278 | chan->max_reg_power = chan->max_power = |
1279 | (int) MBM_TO_DBM(power_rule->max_eirp); | |
1fa25e41 LR |
1280 | } |
1281 | ||
1282 | static void handle_band_custom(struct wiphy *wiphy, enum ieee80211_band band, | |
1283 | const struct ieee80211_regdomain *regd) | |
1284 | { | |
1285 | unsigned int i; | |
1286 | struct ieee80211_supported_band *sband; | |
1287 | ||
1288 | BUG_ON(!wiphy->bands[band]); | |
1289 | sband = wiphy->bands[band]; | |
1290 | ||
1291 | for (i = 0; i < sband->n_channels; i++) | |
1292 | handle_channel_custom(wiphy, band, i, regd); | |
1293 | } | |
1294 | ||
1295 | /* Used by drivers prior to wiphy registration */ | |
1296 | void wiphy_apply_custom_regulatory(struct wiphy *wiphy, | |
1297 | const struct ieee80211_regdomain *regd) | |
1298 | { | |
1299 | enum ieee80211_band band; | |
bbcf3f02 | 1300 | unsigned int bands_set = 0; |
ac46d48e | 1301 | |
abc7381b | 1302 | mutex_lock(®_mutex); |
1fa25e41 | 1303 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) { |
bbcf3f02 LR |
1304 | if (!wiphy->bands[band]) |
1305 | continue; | |
1306 | handle_band_custom(wiphy, band, regd); | |
1307 | bands_set++; | |
b2e1b302 | 1308 | } |
abc7381b | 1309 | mutex_unlock(®_mutex); |
bbcf3f02 LR |
1310 | |
1311 | /* | |
1312 | * no point in calling this if it won't have any effect | |
1a919318 | 1313 | * on your device's supported bands. |
bbcf3f02 LR |
1314 | */ |
1315 | WARN_ON(!bands_set); | |
b2e1b302 | 1316 | } |
1fa25e41 LR |
1317 | EXPORT_SYMBOL(wiphy_apply_custom_regulatory); |
1318 | ||
84fa4f43 JB |
1319 | /* This has the logic which determines when a new request |
1320 | * should be ignored. */ | |
2f92212b JB |
1321 | static enum reg_request_treatment |
1322 | get_reg_request_treatment(struct wiphy *wiphy, | |
2f92cd2e | 1323 | struct regulatory_request *pending_request) |
84fa4f43 | 1324 | { |
806a9e39 | 1325 | struct wiphy *last_wiphy = NULL; |
761cf7ec LR |
1326 | |
1327 | assert_cfg80211_lock(); | |
1328 | ||
84fa4f43 JB |
1329 | /* All initial requests are respected */ |
1330 | if (!last_request) | |
2f92212b | 1331 | return REG_REQ_OK; |
84fa4f43 | 1332 | |
2f92cd2e | 1333 | switch (pending_request->initiator) { |
7db90f4a | 1334 | case NL80211_REGDOM_SET_BY_CORE: |
2f92212b | 1335 | return REG_REQ_OK; |
7db90f4a | 1336 | case NL80211_REGDOM_SET_BY_COUNTRY_IE: |
57b5ce07 LR |
1337 | if (reg_request_cell_base(last_request)) { |
1338 | /* Trust a Cell base station over the AP's country IE */ | |
1339 | if (regdom_changes(pending_request->alpha2)) | |
2f92212b JB |
1340 | return REG_REQ_IGNORE; |
1341 | return REG_REQ_ALREADY_SET; | |
57b5ce07 LR |
1342 | } |
1343 | ||
806a9e39 LR |
1344 | last_wiphy = wiphy_idx_to_wiphy(last_request->wiphy_idx); |
1345 | ||
2f92cd2e | 1346 | if (unlikely(!is_an_alpha2(pending_request->alpha2))) |
84fa4f43 | 1347 | return -EINVAL; |
7db90f4a LR |
1348 | if (last_request->initiator == |
1349 | NL80211_REGDOM_SET_BY_COUNTRY_IE) { | |
806a9e39 | 1350 | if (last_wiphy != wiphy) { |
84fa4f43 JB |
1351 | /* |
1352 | * Two cards with two APs claiming different | |
1fe90b03 | 1353 | * Country IE alpha2s. We could |
84fa4f43 JB |
1354 | * intersect them, but that seems unlikely |
1355 | * to be correct. Reject second one for now. | |
1356 | */ | |
2f92cd2e | 1357 | if (regdom_changes(pending_request->alpha2)) |
2f92212b JB |
1358 | return REG_REQ_IGNORE; |
1359 | return REG_REQ_ALREADY_SET; | |
84fa4f43 | 1360 | } |
fb1fc7ad LR |
1361 | /* |
1362 | * Two consecutive Country IE hints on the same wiphy. | |
1363 | * This should be picked up early by the driver/stack | |
1364 | */ | |
2f92cd2e | 1365 | if (WARN_ON(regdom_changes(pending_request->alpha2))) |
2f92212b JB |
1366 | return REG_REQ_OK; |
1367 | return REG_REQ_ALREADY_SET; | |
84fa4f43 | 1368 | } |
a171fba4 | 1369 | return 0; |
7db90f4a LR |
1370 | case NL80211_REGDOM_SET_BY_DRIVER: |
1371 | if (last_request->initiator == NL80211_REGDOM_SET_BY_CORE) { | |
2f92cd2e | 1372 | if (regdom_changes(pending_request->alpha2)) |
2f92212b JB |
1373 | return REG_REQ_OK; |
1374 | return REG_REQ_ALREADY_SET; | |
e74b1e7f | 1375 | } |
fff32c04 LR |
1376 | |
1377 | /* | |
1378 | * This would happen if you unplug and plug your card | |
1379 | * back in or if you add a new device for which the previously | |
1380 | * loaded card also agrees on the regulatory domain. | |
1381 | */ | |
7db90f4a | 1382 | if (last_request->initiator == NL80211_REGDOM_SET_BY_DRIVER && |
2f92cd2e | 1383 | !regdom_changes(pending_request->alpha2)) |
2f92212b | 1384 | return REG_REQ_ALREADY_SET; |
fff32c04 | 1385 | |
2f92212b | 1386 | return REG_REQ_INTERSECT; |
7db90f4a | 1387 | case NL80211_REGDOM_SET_BY_USER: |
57b5ce07 LR |
1388 | if (reg_request_cell_base(pending_request)) |
1389 | return reg_ignore_cell_hint(pending_request); | |
1390 | ||
1391 | if (reg_request_cell_base(last_request)) | |
2f92212b | 1392 | return REG_REQ_IGNORE; |
57b5ce07 | 1393 | |
7db90f4a | 1394 | if (last_request->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) |
2f92212b | 1395 | return REG_REQ_INTERSECT; |
fb1fc7ad LR |
1396 | /* |
1397 | * If the user knows better the user should set the regdom | |
1398 | * to their country before the IE is picked up | |
1399 | */ | |
7db90f4a | 1400 | if (last_request->initiator == NL80211_REGDOM_SET_BY_USER && |
1a919318 | 1401 | last_request->intersect) |
2f92212b | 1402 | return REG_REQ_IGNORE; |
fb1fc7ad LR |
1403 | /* |
1404 | * Process user requests only after previous user/driver/core | |
1405 | * requests have been processed | |
1406 | */ | |
1a919318 JB |
1407 | if ((last_request->initiator == NL80211_REGDOM_SET_BY_CORE || |
1408 | last_request->initiator == NL80211_REGDOM_SET_BY_DRIVER || | |
1409 | last_request->initiator == NL80211_REGDOM_SET_BY_USER) && | |
1410 | regdom_changes(last_request->alpha2)) | |
2f92212b | 1411 | return REG_REQ_IGNORE; |
5eebade6 | 1412 | |
baeb66fe | 1413 | if (!regdom_changes(pending_request->alpha2)) |
2f92212b | 1414 | return REG_REQ_ALREADY_SET; |
e74b1e7f | 1415 | |
2f92212b | 1416 | return REG_REQ_OK; |
84fa4f43 JB |
1417 | } |
1418 | ||
2f92212b | 1419 | return REG_REQ_IGNORE; |
84fa4f43 JB |
1420 | } |
1421 | ||
b2e253cf LR |
1422 | static void reg_set_request_processed(void) |
1423 | { | |
1424 | bool need_more_processing = false; | |
1425 | ||
1426 | last_request->processed = true; | |
1427 | ||
1428 | spin_lock(®_requests_lock); | |
1429 | if (!list_empty(®_requests_list)) | |
1430 | need_more_processing = true; | |
1431 | spin_unlock(®_requests_lock); | |
1432 | ||
a90c7a31 | 1433 | if (last_request->initiator == NL80211_REGDOM_SET_BY_USER) |
fe20b39e | 1434 | cancel_delayed_work(®_timeout); |
a90c7a31 | 1435 | |
b2e253cf LR |
1436 | if (need_more_processing) |
1437 | schedule_work(®_work); | |
1438 | } | |
1439 | ||
d1c96a9a LR |
1440 | /** |
1441 | * __regulatory_hint - hint to the wireless core a regulatory domain | |
1442 | * @wiphy: if the hint comes from country information from an AP, this | |
1443 | * is required to be set to the wiphy that received the information | |
28da32d7 | 1444 | * @pending_request: the regulatory request currently being processed |
d1c96a9a LR |
1445 | * |
1446 | * The Wireless subsystem can use this function to hint to the wireless core | |
28da32d7 | 1447 | * what it believes should be the current regulatory domain. |
d1c96a9a | 1448 | * |
2f92212b | 1449 | * Returns one of the different reg request treatment values. |
d1c96a9a | 1450 | * |
abc7381b | 1451 | * Caller must hold &cfg80211_mutex and ®_mutex |
d1c96a9a | 1452 | */ |
2f92212b JB |
1453 | static enum reg_request_treatment |
1454 | __regulatory_hint(struct wiphy *wiphy, | |
1455 | struct regulatory_request *pending_request) | |
b2e1b302 | 1456 | { |
e9763c3c | 1457 | const struct ieee80211_regdomain *regd; |
9c96477d | 1458 | bool intersect = false; |
2f92212b | 1459 | enum reg_request_treatment treatment; |
b2e1b302 | 1460 | |
761cf7ec LR |
1461 | assert_cfg80211_lock(); |
1462 | ||
2f92212b | 1463 | treatment = get_reg_request_treatment(wiphy, pending_request); |
9c96477d | 1464 | |
2f92212b JB |
1465 | switch (treatment) { |
1466 | case REG_REQ_INTERSECT: | |
7db90f4a LR |
1467 | if (pending_request->initiator == |
1468 | NL80211_REGDOM_SET_BY_DRIVER) { | |
e9763c3c JB |
1469 | regd = reg_copy_regd(cfg80211_regdomain); |
1470 | if (IS_ERR(regd)) { | |
d951c1dd | 1471 | kfree(pending_request); |
e9763c3c | 1472 | return PTR_ERR(regd); |
d951c1dd | 1473 | } |
e9763c3c | 1474 | wiphy->regd = regd; |
3e0c3ff3 | 1475 | } |
9c96477d | 1476 | intersect = true; |
2f92212b JB |
1477 | break; |
1478 | case REG_REQ_OK: | |
1479 | break; | |
1480 | default: | |
fb1fc7ad LR |
1481 | /* |
1482 | * If the regulatory domain being requested by the | |
3e0c3ff3 | 1483 | * driver has already been set just copy it to the |
fb1fc7ad LR |
1484 | * wiphy |
1485 | */ | |
2f92212b JB |
1486 | if (treatment == REG_REQ_ALREADY_SET && |
1487 | pending_request->initiator == NL80211_REGDOM_SET_BY_DRIVER) { | |
e9763c3c JB |
1488 | regd = reg_copy_regd(cfg80211_regdomain); |
1489 | if (IS_ERR(regd)) { | |
d951c1dd | 1490 | kfree(pending_request); |
2f92212b | 1491 | return REG_REQ_IGNORE; |
d951c1dd | 1492 | } |
2f92212b | 1493 | treatment = REG_REQ_ALREADY_SET; |
e9763c3c | 1494 | wiphy->regd = regd; |
3e0c3ff3 LR |
1495 | goto new_request; |
1496 | } | |
d951c1dd | 1497 | kfree(pending_request); |
2f92212b | 1498 | return treatment; |
3e0c3ff3 | 1499 | } |
b2e1b302 | 1500 | |
3e0c3ff3 | 1501 | new_request: |
a042994d LR |
1502 | if (last_request != &core_request_world) |
1503 | kfree(last_request); | |
5203cdb6 | 1504 | |
d951c1dd LR |
1505 | last_request = pending_request; |
1506 | last_request->intersect = intersect; | |
5203cdb6 | 1507 | |
d951c1dd | 1508 | pending_request = NULL; |
3e0c3ff3 | 1509 | |
09d989d1 LR |
1510 | if (last_request->initiator == NL80211_REGDOM_SET_BY_USER) { |
1511 | user_alpha2[0] = last_request->alpha2[0]; | |
1512 | user_alpha2[1] = last_request->alpha2[1]; | |
1513 | } | |
1514 | ||
2f92212b JB |
1515 | /* When r == REG_REQ_INTERSECT we do need to call CRDA */ |
1516 | if (treatment != REG_REQ_OK && treatment != REG_REQ_INTERSECT) { | |
73d54c9e LR |
1517 | /* |
1518 | * Since CRDA will not be called in this case as we already | |
1519 | * have applied the requested regulatory domain before we just | |
1520 | * inform userspace we have processed the request | |
1521 | */ | |
2f92212b | 1522 | if (treatment == REG_REQ_ALREADY_SET) { |
73d54c9e | 1523 | nl80211_send_reg_change_event(last_request); |
b2e253cf LR |
1524 | reg_set_request_processed(); |
1525 | } | |
2f92212b | 1526 | return treatment; |
73d54c9e | 1527 | } |
3e0c3ff3 | 1528 | |
2f92212b JB |
1529 | if (call_crda(last_request->alpha2)) |
1530 | return REG_REQ_IGNORE; | |
1531 | return REG_REQ_OK; | |
b2e1b302 LR |
1532 | } |
1533 | ||
30a548c7 | 1534 | /* This processes *all* regulatory hints */ |
8848bef0 LR |
1535 | static void reg_process_hint(struct regulatory_request *reg_request, |
1536 | enum nl80211_reg_initiator reg_initiator) | |
fe33eb39 | 1537 | { |
fe33eb39 LR |
1538 | struct wiphy *wiphy = NULL; |
1539 | ||
1540 | BUG_ON(!reg_request->alpha2); | |
1541 | ||
fe33eb39 LR |
1542 | if (wiphy_idx_valid(reg_request->wiphy_idx)) |
1543 | wiphy = wiphy_idx_to_wiphy(reg_request->wiphy_idx); | |
1544 | ||
1a919318 | 1545 | if (reg_initiator == NL80211_REGDOM_SET_BY_DRIVER && !wiphy) { |
d951c1dd | 1546 | kfree(reg_request); |
b0e2880b | 1547 | return; |
fe33eb39 LR |
1548 | } |
1549 | ||
2f92212b JB |
1550 | switch (__regulatory_hint(wiphy, reg_request)) { |
1551 | case REG_REQ_ALREADY_SET: | |
1552 | /* This is required so that the orig_* parameters are saved */ | |
1553 | if (wiphy && wiphy->flags & WIPHY_FLAG_STRICT_REGULATORY) | |
1554 | wiphy_update_regulatory(wiphy, reg_initiator); | |
1555 | break; | |
1556 | default: | |
1557 | if (reg_initiator == NL80211_REGDOM_SET_BY_USER) | |
1558 | schedule_delayed_work(®_timeout, | |
1559 | msecs_to_jiffies(3142)); | |
1560 | break; | |
a90c7a31 | 1561 | } |
fe33eb39 LR |
1562 | } |
1563 | ||
b2e253cf LR |
1564 | /* |
1565 | * Processes regulatory hints, this is all the NL80211_REGDOM_SET_BY_* | |
1566 | * Regulatory hints come on a first come first serve basis and we | |
1567 | * must process each one atomically. | |
1568 | */ | |
fe33eb39 | 1569 | static void reg_process_pending_hints(void) |
b0e2880b | 1570 | { |
fe33eb39 | 1571 | struct regulatory_request *reg_request; |
fe33eb39 | 1572 | |
b0e2880b LR |
1573 | mutex_lock(&cfg80211_mutex); |
1574 | mutex_lock(®_mutex); | |
1575 | ||
b2e253cf LR |
1576 | /* When last_request->processed becomes true this will be rescheduled */ |
1577 | if (last_request && !last_request->processed) { | |
1a919318 | 1578 | REG_DBG_PRINT("Pending regulatory request, waiting for it to be processed...\n"); |
b2e253cf LR |
1579 | goto out; |
1580 | } | |
1581 | ||
fe33eb39 | 1582 | spin_lock(®_requests_lock); |
fe33eb39 | 1583 | |
b2e253cf | 1584 | if (list_empty(®_requests_list)) { |
d951c1dd | 1585 | spin_unlock(®_requests_lock); |
b2e253cf | 1586 | goto out; |
fe33eb39 | 1587 | } |
b2e253cf LR |
1588 | |
1589 | reg_request = list_first_entry(®_requests_list, | |
1590 | struct regulatory_request, | |
1591 | list); | |
1592 | list_del_init(®_request->list); | |
1593 | ||
fe33eb39 | 1594 | spin_unlock(®_requests_lock); |
b0e2880b | 1595 | |
8848bef0 | 1596 | reg_process_hint(reg_request, reg_request->initiator); |
b2e253cf LR |
1597 | |
1598 | out: | |
b0e2880b LR |
1599 | mutex_unlock(®_mutex); |
1600 | mutex_unlock(&cfg80211_mutex); | |
fe33eb39 LR |
1601 | } |
1602 | ||
e38f8a7a LR |
1603 | /* Processes beacon hints -- this has nothing to do with country IEs */ |
1604 | static void reg_process_pending_beacon_hints(void) | |
1605 | { | |
79c97e97 | 1606 | struct cfg80211_registered_device *rdev; |
e38f8a7a LR |
1607 | struct reg_beacon *pending_beacon, *tmp; |
1608 | ||
abc7381b LR |
1609 | /* |
1610 | * No need to hold the reg_mutex here as we just touch wiphys | |
1611 | * and do not read or access regulatory variables. | |
1612 | */ | |
e38f8a7a LR |
1613 | mutex_lock(&cfg80211_mutex); |
1614 | ||
1615 | /* This goes through the _pending_ beacon list */ | |
1616 | spin_lock_bh(®_pending_beacons_lock); | |
1617 | ||
e38f8a7a LR |
1618 | list_for_each_entry_safe(pending_beacon, tmp, |
1619 | ®_pending_beacons, list) { | |
e38f8a7a LR |
1620 | list_del_init(&pending_beacon->list); |
1621 | ||
1622 | /* Applies the beacon hint to current wiphys */ | |
79c97e97 JB |
1623 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) |
1624 | wiphy_update_new_beacon(&rdev->wiphy, pending_beacon); | |
e38f8a7a LR |
1625 | |
1626 | /* Remembers the beacon hint for new wiphys or reg changes */ | |
1627 | list_add_tail(&pending_beacon->list, ®_beacon_list); | |
1628 | } | |
1629 | ||
1630 | spin_unlock_bh(®_pending_beacons_lock); | |
e38f8a7a LR |
1631 | mutex_unlock(&cfg80211_mutex); |
1632 | } | |
1633 | ||
fe33eb39 LR |
1634 | static void reg_todo(struct work_struct *work) |
1635 | { | |
1636 | reg_process_pending_hints(); | |
e38f8a7a | 1637 | reg_process_pending_beacon_hints(); |
fe33eb39 LR |
1638 | } |
1639 | ||
fe33eb39 LR |
1640 | static void queue_regulatory_request(struct regulatory_request *request) |
1641 | { | |
c61029c7 JL |
1642 | if (isalpha(request->alpha2[0])) |
1643 | request->alpha2[0] = toupper(request->alpha2[0]); | |
1644 | if (isalpha(request->alpha2[1])) | |
1645 | request->alpha2[1] = toupper(request->alpha2[1]); | |
1646 | ||
fe33eb39 LR |
1647 | spin_lock(®_requests_lock); |
1648 | list_add_tail(&request->list, ®_requests_list); | |
1649 | spin_unlock(®_requests_lock); | |
1650 | ||
1651 | schedule_work(®_work); | |
1652 | } | |
1653 | ||
09d989d1 LR |
1654 | /* |
1655 | * Core regulatory hint -- happens during cfg80211_init() | |
1656 | * and when we restore regulatory settings. | |
1657 | */ | |
ba25c141 LR |
1658 | static int regulatory_hint_core(const char *alpha2) |
1659 | { | |
1660 | struct regulatory_request *request; | |
1661 | ||
1a919318 | 1662 | request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); |
ba25c141 LR |
1663 | if (!request) |
1664 | return -ENOMEM; | |
1665 | ||
1666 | request->alpha2[0] = alpha2[0]; | |
1667 | request->alpha2[1] = alpha2[1]; | |
7db90f4a | 1668 | request->initiator = NL80211_REGDOM_SET_BY_CORE; |
ba25c141 | 1669 | |
31e99729 | 1670 | queue_regulatory_request(request); |
5078b2e3 | 1671 | |
fe33eb39 | 1672 | return 0; |
ba25c141 LR |
1673 | } |
1674 | ||
fe33eb39 | 1675 | /* User hints */ |
57b5ce07 LR |
1676 | int regulatory_hint_user(const char *alpha2, |
1677 | enum nl80211_user_reg_hint_type user_reg_hint_type) | |
b2e1b302 | 1678 | { |
fe33eb39 LR |
1679 | struct regulatory_request *request; |
1680 | ||
be3d4810 | 1681 | BUG_ON(!alpha2); |
b2e1b302 | 1682 | |
fe33eb39 LR |
1683 | request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); |
1684 | if (!request) | |
1685 | return -ENOMEM; | |
1686 | ||
1687 | request->wiphy_idx = WIPHY_IDX_STALE; | |
1688 | request->alpha2[0] = alpha2[0]; | |
1689 | request->alpha2[1] = alpha2[1]; | |
e12822e1 | 1690 | request->initiator = NL80211_REGDOM_SET_BY_USER; |
57b5ce07 | 1691 | request->user_reg_hint_type = user_reg_hint_type; |
fe33eb39 LR |
1692 | |
1693 | queue_regulatory_request(request); | |
1694 | ||
1695 | return 0; | |
1696 | } | |
1697 | ||
1698 | /* Driver hints */ | |
1699 | int regulatory_hint(struct wiphy *wiphy, const char *alpha2) | |
1700 | { | |
1701 | struct regulatory_request *request; | |
1702 | ||
1703 | BUG_ON(!alpha2); | |
1704 | BUG_ON(!wiphy); | |
1705 | ||
1706 | request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); | |
1707 | if (!request) | |
1708 | return -ENOMEM; | |
1709 | ||
1710 | request->wiphy_idx = get_wiphy_idx(wiphy); | |
1711 | ||
1712 | /* Must have registered wiphy first */ | |
1713 | BUG_ON(!wiphy_idx_valid(request->wiphy_idx)); | |
1714 | ||
1715 | request->alpha2[0] = alpha2[0]; | |
1716 | request->alpha2[1] = alpha2[1]; | |
7db90f4a | 1717 | request->initiator = NL80211_REGDOM_SET_BY_DRIVER; |
fe33eb39 LR |
1718 | |
1719 | queue_regulatory_request(request); | |
1720 | ||
1721 | return 0; | |
b2e1b302 LR |
1722 | } |
1723 | EXPORT_SYMBOL(regulatory_hint); | |
1724 | ||
4b44c8bc LR |
1725 | /* |
1726 | * We hold wdev_lock() here so we cannot hold cfg80211_mutex() and | |
1727 | * therefore cannot iterate over the rdev list here. | |
1728 | */ | |
1a919318 JB |
1729 | void regulatory_hint_11d(struct wiphy *wiphy, enum ieee80211_band band, |
1730 | const u8 *country_ie, u8 country_ie_len) | |
3f2355cb | 1731 | { |
3f2355cb | 1732 | char alpha2[2]; |
3f2355cb | 1733 | enum environment_cap env = ENVIRON_ANY; |
fe33eb39 | 1734 | struct regulatory_request *request; |
3f2355cb | 1735 | |
abc7381b | 1736 | mutex_lock(®_mutex); |
3f2355cb | 1737 | |
9828b017 LR |
1738 | if (unlikely(!last_request)) |
1739 | goto out; | |
d335fe63 | 1740 | |
3f2355cb LR |
1741 | /* IE len must be evenly divisible by 2 */ |
1742 | if (country_ie_len & 0x01) | |
1743 | goto out; | |
1744 | ||
1745 | if (country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN) | |
1746 | goto out; | |
1747 | ||
3f2355cb LR |
1748 | alpha2[0] = country_ie[0]; |
1749 | alpha2[1] = country_ie[1]; | |
1750 | ||
1751 | if (country_ie[2] == 'I') | |
1752 | env = ENVIRON_INDOOR; | |
1753 | else if (country_ie[2] == 'O') | |
1754 | env = ENVIRON_OUTDOOR; | |
1755 | ||
fb1fc7ad | 1756 | /* |
8b19e6ca | 1757 | * We will run this only upon a successful connection on cfg80211. |
4b44c8bc LR |
1758 | * We leave conflict resolution to the workqueue, where can hold |
1759 | * cfg80211_mutex. | |
fb1fc7ad | 1760 | */ |
cc0b6fe8 | 1761 | if (likely(last_request->initiator == |
1a919318 JB |
1762 | NL80211_REGDOM_SET_BY_COUNTRY_IE && |
1763 | wiphy_idx_valid(last_request->wiphy_idx))) | |
4b44c8bc | 1764 | goto out; |
3f2355cb | 1765 | |
fe33eb39 LR |
1766 | request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); |
1767 | if (!request) | |
f9f9b6e3 | 1768 | goto out; |
fe33eb39 | 1769 | |
fe33eb39 | 1770 | request->wiphy_idx = get_wiphy_idx(wiphy); |
4f366c5d JL |
1771 | request->alpha2[0] = alpha2[0]; |
1772 | request->alpha2[1] = alpha2[1]; | |
7db90f4a | 1773 | request->initiator = NL80211_REGDOM_SET_BY_COUNTRY_IE; |
fe33eb39 LR |
1774 | request->country_ie_env = env; |
1775 | ||
fe33eb39 | 1776 | queue_regulatory_request(request); |
3f2355cb | 1777 | out: |
abc7381b | 1778 | mutex_unlock(®_mutex); |
3f2355cb | 1779 | } |
b2e1b302 | 1780 | |
09d989d1 LR |
1781 | static void restore_alpha2(char *alpha2, bool reset_user) |
1782 | { | |
1783 | /* indicates there is no alpha2 to consider for restoration */ | |
1784 | alpha2[0] = '9'; | |
1785 | alpha2[1] = '7'; | |
1786 | ||
1787 | /* The user setting has precedence over the module parameter */ | |
1788 | if (is_user_regdom_saved()) { | |
1789 | /* Unless we're asked to ignore it and reset it */ | |
1790 | if (reset_user) { | |
1a919318 | 1791 | REG_DBG_PRINT("Restoring regulatory settings including user preference\n"); |
09d989d1 LR |
1792 | user_alpha2[0] = '9'; |
1793 | user_alpha2[1] = '7'; | |
1794 | ||
1795 | /* | |
1796 | * If we're ignoring user settings, we still need to | |
1797 | * check the module parameter to ensure we put things | |
1798 | * back as they were for a full restore. | |
1799 | */ | |
1800 | if (!is_world_regdom(ieee80211_regdom)) { | |
1a919318 JB |
1801 | REG_DBG_PRINT("Keeping preference on module parameter ieee80211_regdom: %c%c\n", |
1802 | ieee80211_regdom[0], ieee80211_regdom[1]); | |
09d989d1 LR |
1803 | alpha2[0] = ieee80211_regdom[0]; |
1804 | alpha2[1] = ieee80211_regdom[1]; | |
1805 | } | |
1806 | } else { | |
1a919318 JB |
1807 | REG_DBG_PRINT("Restoring regulatory settings while preserving user preference for: %c%c\n", |
1808 | user_alpha2[0], user_alpha2[1]); | |
09d989d1 LR |
1809 | alpha2[0] = user_alpha2[0]; |
1810 | alpha2[1] = user_alpha2[1]; | |
1811 | } | |
1812 | } else if (!is_world_regdom(ieee80211_regdom)) { | |
1a919318 JB |
1813 | REG_DBG_PRINT("Keeping preference on module parameter ieee80211_regdom: %c%c\n", |
1814 | ieee80211_regdom[0], ieee80211_regdom[1]); | |
09d989d1 LR |
1815 | alpha2[0] = ieee80211_regdom[0]; |
1816 | alpha2[1] = ieee80211_regdom[1]; | |
1817 | } else | |
d91e41b6 | 1818 | REG_DBG_PRINT("Restoring regulatory settings\n"); |
09d989d1 LR |
1819 | } |
1820 | ||
5ce543d1 RM |
1821 | static void restore_custom_reg_settings(struct wiphy *wiphy) |
1822 | { | |
1823 | struct ieee80211_supported_band *sband; | |
1824 | enum ieee80211_band band; | |
1825 | struct ieee80211_channel *chan; | |
1826 | int i; | |
1827 | ||
1828 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) { | |
1829 | sband = wiphy->bands[band]; | |
1830 | if (!sband) | |
1831 | continue; | |
1832 | for (i = 0; i < sband->n_channels; i++) { | |
1833 | chan = &sband->channels[i]; | |
1834 | chan->flags = chan->orig_flags; | |
1835 | chan->max_antenna_gain = chan->orig_mag; | |
1836 | chan->max_power = chan->orig_mpwr; | |
899852af | 1837 | chan->beacon_found = false; |
5ce543d1 RM |
1838 | } |
1839 | } | |
1840 | } | |
1841 | ||
09d989d1 LR |
1842 | /* |
1843 | * Restoring regulatory settings involves ingoring any | |
1844 | * possibly stale country IE information and user regulatory | |
1845 | * settings if so desired, this includes any beacon hints | |
1846 | * learned as we could have traveled outside to another country | |
1847 | * after disconnection. To restore regulatory settings we do | |
1848 | * exactly what we did at bootup: | |
1849 | * | |
1850 | * - send a core regulatory hint | |
1851 | * - send a user regulatory hint if applicable | |
1852 | * | |
1853 | * Device drivers that send a regulatory hint for a specific country | |
1854 | * keep their own regulatory domain on wiphy->regd so that does does | |
1855 | * not need to be remembered. | |
1856 | */ | |
1857 | static void restore_regulatory_settings(bool reset_user) | |
1858 | { | |
1859 | char alpha2[2]; | |
cee0bec5 | 1860 | char world_alpha2[2]; |
09d989d1 | 1861 | struct reg_beacon *reg_beacon, *btmp; |
14609555 LR |
1862 | struct regulatory_request *reg_request, *tmp; |
1863 | LIST_HEAD(tmp_reg_req_list); | |
5ce543d1 | 1864 | struct cfg80211_registered_device *rdev; |
09d989d1 LR |
1865 | |
1866 | mutex_lock(&cfg80211_mutex); | |
1867 | mutex_lock(®_mutex); | |
1868 | ||
a042994d | 1869 | reset_regdomains(true); |
09d989d1 LR |
1870 | restore_alpha2(alpha2, reset_user); |
1871 | ||
14609555 LR |
1872 | /* |
1873 | * If there's any pending requests we simply | |
1874 | * stash them to a temporary pending queue and | |
1875 | * add then after we've restored regulatory | |
1876 | * settings. | |
1877 | */ | |
1878 | spin_lock(®_requests_lock); | |
fea9bced JB |
1879 | list_for_each_entry_safe(reg_request, tmp, ®_requests_list, list) { |
1880 | if (reg_request->initiator != NL80211_REGDOM_SET_BY_USER) | |
1881 | continue; | |
1882 | list_move_tail(®_request->list, &tmp_reg_req_list); | |
14609555 LR |
1883 | } |
1884 | spin_unlock(®_requests_lock); | |
1885 | ||
09d989d1 LR |
1886 | /* Clear beacon hints */ |
1887 | spin_lock_bh(®_pending_beacons_lock); | |
fea9bced JB |
1888 | list_for_each_entry_safe(reg_beacon, btmp, ®_pending_beacons, list) { |
1889 | list_del(®_beacon->list); | |
1890 | kfree(reg_beacon); | |
09d989d1 LR |
1891 | } |
1892 | spin_unlock_bh(®_pending_beacons_lock); | |
1893 | ||
fea9bced JB |
1894 | list_for_each_entry_safe(reg_beacon, btmp, ®_beacon_list, list) { |
1895 | list_del(®_beacon->list); | |
1896 | kfree(reg_beacon); | |
09d989d1 LR |
1897 | } |
1898 | ||
1899 | /* First restore to the basic regulatory settings */ | |
1900 | cfg80211_regdomain = cfg80211_world_regdom; | |
cee0bec5 DS |
1901 | world_alpha2[0] = cfg80211_regdomain->alpha2[0]; |
1902 | world_alpha2[1] = cfg80211_regdomain->alpha2[1]; | |
09d989d1 | 1903 | |
5ce543d1 RM |
1904 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) { |
1905 | if (rdev->wiphy.flags & WIPHY_FLAG_CUSTOM_REGULATORY) | |
1906 | restore_custom_reg_settings(&rdev->wiphy); | |
1907 | } | |
1908 | ||
09d989d1 LR |
1909 | mutex_unlock(®_mutex); |
1910 | mutex_unlock(&cfg80211_mutex); | |
1911 | ||
cee0bec5 | 1912 | regulatory_hint_core(world_alpha2); |
09d989d1 LR |
1913 | |
1914 | /* | |
1915 | * This restores the ieee80211_regdom module parameter | |
1916 | * preference or the last user requested regulatory | |
1917 | * settings, user regulatory settings takes precedence. | |
1918 | */ | |
1919 | if (is_an_alpha2(alpha2)) | |
57b5ce07 | 1920 | regulatory_hint_user(user_alpha2, NL80211_USER_REG_HINT_USER); |
09d989d1 | 1921 | |
14609555 LR |
1922 | if (list_empty(&tmp_reg_req_list)) |
1923 | return; | |
1924 | ||
1925 | mutex_lock(&cfg80211_mutex); | |
1926 | mutex_lock(®_mutex); | |
1927 | ||
1928 | spin_lock(®_requests_lock); | |
1929 | list_for_each_entry_safe(reg_request, tmp, &tmp_reg_req_list, list) { | |
1a919318 JB |
1930 | REG_DBG_PRINT("Adding request for country %c%c back into the queue\n", |
1931 | reg_request->alpha2[0], reg_request->alpha2[1]); | |
00a9ac4c | 1932 | list_move_tail(®_request->list, ®_requests_list); |
14609555 LR |
1933 | } |
1934 | spin_unlock(®_requests_lock); | |
1935 | ||
1936 | mutex_unlock(®_mutex); | |
1937 | mutex_unlock(&cfg80211_mutex); | |
1938 | ||
1939 | REG_DBG_PRINT("Kicking the queue\n"); | |
1940 | ||
1941 | schedule_work(®_work); | |
1942 | } | |
09d989d1 LR |
1943 | |
1944 | void regulatory_hint_disconnect(void) | |
1945 | { | |
1a919318 | 1946 | REG_DBG_PRINT("All devices are disconnected, going to restore regulatory settings\n"); |
09d989d1 LR |
1947 | restore_regulatory_settings(false); |
1948 | } | |
1949 | ||
e38f8a7a LR |
1950 | static bool freq_is_chan_12_13_14(u16 freq) |
1951 | { | |
59eb21a6 BR |
1952 | if (freq == ieee80211_channel_to_frequency(12, IEEE80211_BAND_2GHZ) || |
1953 | freq == ieee80211_channel_to_frequency(13, IEEE80211_BAND_2GHZ) || | |
1954 | freq == ieee80211_channel_to_frequency(14, IEEE80211_BAND_2GHZ)) | |
e38f8a7a LR |
1955 | return true; |
1956 | return false; | |
1957 | } | |
1958 | ||
1959 | int regulatory_hint_found_beacon(struct wiphy *wiphy, | |
1960 | struct ieee80211_channel *beacon_chan, | |
1961 | gfp_t gfp) | |
1962 | { | |
1963 | struct reg_beacon *reg_beacon; | |
1964 | ||
1a919318 JB |
1965 | if (beacon_chan->beacon_found || |
1966 | beacon_chan->flags & IEEE80211_CHAN_RADAR || | |
e38f8a7a | 1967 | (beacon_chan->band == IEEE80211_BAND_2GHZ && |
1a919318 | 1968 | !freq_is_chan_12_13_14(beacon_chan->center_freq))) |
e38f8a7a LR |
1969 | return 0; |
1970 | ||
1971 | reg_beacon = kzalloc(sizeof(struct reg_beacon), gfp); | |
1972 | if (!reg_beacon) | |
1973 | return -ENOMEM; | |
1974 | ||
1a919318 | 1975 | REG_DBG_PRINT("Found new beacon on frequency: %d MHz (Ch %d) on %s\n", |
4113f751 LR |
1976 | beacon_chan->center_freq, |
1977 | ieee80211_frequency_to_channel(beacon_chan->center_freq), | |
1978 | wiphy_name(wiphy)); | |
1979 | ||
e38f8a7a | 1980 | memcpy(®_beacon->chan, beacon_chan, |
1a919318 | 1981 | sizeof(struct ieee80211_channel)); |
e38f8a7a LR |
1982 | |
1983 | /* | |
1984 | * Since we can be called from BH or and non-BH context | |
1985 | * we must use spin_lock_bh() | |
1986 | */ | |
1987 | spin_lock_bh(®_pending_beacons_lock); | |
1988 | list_add_tail(®_beacon->list, ®_pending_beacons); | |
1989 | spin_unlock_bh(®_pending_beacons_lock); | |
1990 | ||
1991 | schedule_work(®_work); | |
1992 | ||
1993 | return 0; | |
1994 | } | |
1995 | ||
a3d2eaf0 | 1996 | static void print_rd_rules(const struct ieee80211_regdomain *rd) |
b2e1b302 LR |
1997 | { |
1998 | unsigned int i; | |
a3d2eaf0 JB |
1999 | const struct ieee80211_reg_rule *reg_rule = NULL; |
2000 | const struct ieee80211_freq_range *freq_range = NULL; | |
2001 | const struct ieee80211_power_rule *power_rule = NULL; | |
b2e1b302 | 2002 | |
6653325a | 2003 | pr_info(" (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)\n"); |
b2e1b302 LR |
2004 | |
2005 | for (i = 0; i < rd->n_reg_rules; i++) { | |
2006 | reg_rule = &rd->reg_rules[i]; | |
2007 | freq_range = ®_rule->freq_range; | |
2008 | power_rule = ®_rule->power_rule; | |
2009 | ||
fb1fc7ad LR |
2010 | /* |
2011 | * There may not be documentation for max antenna gain | |
2012 | * in certain regions | |
2013 | */ | |
b2e1b302 | 2014 | if (power_rule->max_antenna_gain) |
6653325a | 2015 | pr_info(" (%d KHz - %d KHz @ %d KHz), (%d mBi, %d mBm)\n", |
b2e1b302 LR |
2016 | freq_range->start_freq_khz, |
2017 | freq_range->end_freq_khz, | |
2018 | freq_range->max_bandwidth_khz, | |
2019 | power_rule->max_antenna_gain, | |
2020 | power_rule->max_eirp); | |
2021 | else | |
6653325a | 2022 | pr_info(" (%d KHz - %d KHz @ %d KHz), (N/A, %d mBm)\n", |
b2e1b302 LR |
2023 | freq_range->start_freq_khz, |
2024 | freq_range->end_freq_khz, | |
2025 | freq_range->max_bandwidth_khz, | |
2026 | power_rule->max_eirp); | |
2027 | } | |
2028 | } | |
2029 | ||
8b60b078 LR |
2030 | bool reg_supported_dfs_region(u8 dfs_region) |
2031 | { | |
2032 | switch (dfs_region) { | |
2033 | case NL80211_DFS_UNSET: | |
2034 | case NL80211_DFS_FCC: | |
2035 | case NL80211_DFS_ETSI: | |
2036 | case NL80211_DFS_JP: | |
2037 | return true; | |
2038 | default: | |
2039 | REG_DBG_PRINT("Ignoring uknown DFS master region: %d\n", | |
2040 | dfs_region); | |
2041 | return false; | |
2042 | } | |
2043 | } | |
2044 | ||
2045 | static void print_dfs_region(u8 dfs_region) | |
2046 | { | |
2047 | if (!dfs_region) | |
2048 | return; | |
2049 | ||
2050 | switch (dfs_region) { | |
2051 | case NL80211_DFS_FCC: | |
2052 | pr_info(" DFS Master region FCC"); | |
2053 | break; | |
2054 | case NL80211_DFS_ETSI: | |
2055 | pr_info(" DFS Master region ETSI"); | |
2056 | break; | |
2057 | case NL80211_DFS_JP: | |
2058 | pr_info(" DFS Master region JP"); | |
2059 | break; | |
2060 | default: | |
1a919318 | 2061 | pr_info(" DFS Master region Unknown"); |
8b60b078 LR |
2062 | break; |
2063 | } | |
2064 | } | |
2065 | ||
a3d2eaf0 | 2066 | static void print_regdomain(const struct ieee80211_regdomain *rd) |
b2e1b302 LR |
2067 | { |
2068 | ||
3f2355cb | 2069 | if (is_intersected_alpha2(rd->alpha2)) { |
7db90f4a LR |
2070 | if (last_request->initiator == |
2071 | NL80211_REGDOM_SET_BY_COUNTRY_IE) { | |
79c97e97 JB |
2072 | struct cfg80211_registered_device *rdev; |
2073 | rdev = cfg80211_rdev_by_wiphy_idx( | |
806a9e39 | 2074 | last_request->wiphy_idx); |
79c97e97 | 2075 | if (rdev) { |
e9c0268f | 2076 | pr_info("Current regulatory domain updated by AP to: %c%c\n", |
79c97e97 JB |
2077 | rdev->country_ie_alpha2[0], |
2078 | rdev->country_ie_alpha2[1]); | |
3f2355cb | 2079 | } else |
e9c0268f | 2080 | pr_info("Current regulatory domain intersected:\n"); |
3f2355cb | 2081 | } else |
e9c0268f | 2082 | pr_info("Current regulatory domain intersected:\n"); |
1a919318 | 2083 | } else if (is_world_regdom(rd->alpha2)) { |
e9c0268f | 2084 | pr_info("World regulatory domain updated:\n"); |
1a919318 | 2085 | } else { |
b2e1b302 | 2086 | if (is_unknown_alpha2(rd->alpha2)) |
e9c0268f | 2087 | pr_info("Regulatory domain changed to driver built-in settings (unknown country)\n"); |
57b5ce07 LR |
2088 | else { |
2089 | if (reg_request_cell_base(last_request)) | |
1a919318 | 2090 | pr_info("Regulatory domain changed to country: %c%c by Cell Station\n", |
57b5ce07 LR |
2091 | rd->alpha2[0], rd->alpha2[1]); |
2092 | else | |
1a919318 | 2093 | pr_info("Regulatory domain changed to country: %c%c\n", |
57b5ce07 LR |
2094 | rd->alpha2[0], rd->alpha2[1]); |
2095 | } | |
b2e1b302 | 2096 | } |
1a919318 | 2097 | |
8b60b078 | 2098 | print_dfs_region(rd->dfs_region); |
b2e1b302 LR |
2099 | print_rd_rules(rd); |
2100 | } | |
2101 | ||
2df78167 | 2102 | static void print_regdomain_info(const struct ieee80211_regdomain *rd) |
b2e1b302 | 2103 | { |
e9c0268f | 2104 | pr_info("Regulatory domain: %c%c\n", rd->alpha2[0], rd->alpha2[1]); |
b2e1b302 LR |
2105 | print_rd_rules(rd); |
2106 | } | |
2107 | ||
d2372b31 | 2108 | /* Takes ownership of rd only if it doesn't fail */ |
a3d2eaf0 | 2109 | static int __set_regdom(const struct ieee80211_regdomain *rd) |
b2e1b302 | 2110 | { |
e9763c3c | 2111 | const struct ieee80211_regdomain *regd; |
9c96477d | 2112 | const struct ieee80211_regdomain *intersected_rd = NULL; |
806a9e39 | 2113 | struct wiphy *request_wiphy; |
b2e1b302 LR |
2114 | /* Some basic sanity checks first */ |
2115 | ||
b2e1b302 | 2116 | if (is_world_regdom(rd->alpha2)) { |
f6037d09 | 2117 | if (WARN_ON(!reg_is_valid_request(rd->alpha2))) |
b2e1b302 LR |
2118 | return -EINVAL; |
2119 | update_world_regdomain(rd); | |
2120 | return 0; | |
2121 | } | |
b2e1b302 LR |
2122 | |
2123 | if (!is_alpha2_set(rd->alpha2) && !is_an_alpha2(rd->alpha2) && | |
1a919318 | 2124 | !is_unknown_alpha2(rd->alpha2)) |
b2e1b302 LR |
2125 | return -EINVAL; |
2126 | ||
f6037d09 | 2127 | if (!last_request) |
b2e1b302 LR |
2128 | return -EINVAL; |
2129 | ||
fb1fc7ad LR |
2130 | /* |
2131 | * Lets only bother proceeding on the same alpha2 if the current | |
3f2355cb | 2132 | * rd is non static (it means CRDA was present and was used last) |
fb1fc7ad LR |
2133 | * and the pending request came in from a country IE |
2134 | */ | |
7db90f4a | 2135 | if (last_request->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE) { |
fb1fc7ad LR |
2136 | /* |
2137 | * If someone else asked us to change the rd lets only bother | |
2138 | * checking if the alpha2 changes if CRDA was already called | |
2139 | */ | |
baeb66fe | 2140 | if (!regdom_changes(rd->alpha2)) |
95908535 | 2141 | return -EALREADY; |
3f2355cb LR |
2142 | } |
2143 | ||
fb1fc7ad LR |
2144 | /* |
2145 | * Now lets set the regulatory domain, update all driver channels | |
b2e1b302 LR |
2146 | * and finally inform them of what we have done, in case they want |
2147 | * to review or adjust their own settings based on their own | |
fb1fc7ad LR |
2148 | * internal EEPROM data |
2149 | */ | |
b2e1b302 | 2150 | |
f6037d09 | 2151 | if (WARN_ON(!reg_is_valid_request(rd->alpha2))) |
b2e1b302 LR |
2152 | return -EINVAL; |
2153 | ||
8375af3b | 2154 | if (!is_valid_rd(rd)) { |
e9c0268f | 2155 | pr_err("Invalid regulatory domain detected:\n"); |
8375af3b LR |
2156 | print_regdomain_info(rd); |
2157 | return -EINVAL; | |
b2e1b302 LR |
2158 | } |
2159 | ||
806a9e39 | 2160 | request_wiphy = wiphy_idx_to_wiphy(last_request->wiphy_idx); |
0bac71af LR |
2161 | if (!request_wiphy && |
2162 | (last_request->initiator == NL80211_REGDOM_SET_BY_DRIVER || | |
2163 | last_request->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE)) { | |
2164 | schedule_delayed_work(®_timeout, 0); | |
de3584bd JB |
2165 | return -ENODEV; |
2166 | } | |
806a9e39 | 2167 | |
b8295acd | 2168 | if (!last_request->intersect) { |
7db90f4a | 2169 | if (last_request->initiator != NL80211_REGDOM_SET_BY_DRIVER) { |
a042994d | 2170 | reset_regdomains(false); |
3e0c3ff3 LR |
2171 | cfg80211_regdomain = rd; |
2172 | return 0; | |
2173 | } | |
2174 | ||
fb1fc7ad LR |
2175 | /* |
2176 | * For a driver hint, lets copy the regulatory domain the | |
2177 | * driver wanted to the wiphy to deal with conflicts | |
2178 | */ | |
3e0c3ff3 | 2179 | |
558f6d32 LR |
2180 | /* |
2181 | * Userspace could have sent two replies with only | |
2182 | * one kernel request. | |
2183 | */ | |
2184 | if (request_wiphy->regd) | |
2185 | return -EALREADY; | |
3e0c3ff3 | 2186 | |
e9763c3c JB |
2187 | regd = reg_copy_regd(rd); |
2188 | if (IS_ERR(regd)) | |
2189 | return PTR_ERR(regd); | |
3e0c3ff3 | 2190 | |
e9763c3c | 2191 | request_wiphy->regd = regd; |
a042994d | 2192 | reset_regdomains(false); |
b8295acd LR |
2193 | cfg80211_regdomain = rd; |
2194 | return 0; | |
2195 | } | |
2196 | ||
2197 | /* Intersection requires a bit more work */ | |
2198 | ||
7db90f4a | 2199 | if (last_request->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE) { |
9c96477d LR |
2200 | intersected_rd = regdom_intersect(rd, cfg80211_regdomain); |
2201 | if (!intersected_rd) | |
2202 | return -EINVAL; | |
b8295acd | 2203 | |
fb1fc7ad LR |
2204 | /* |
2205 | * We can trash what CRDA provided now. | |
3e0c3ff3 | 2206 | * However if a driver requested this specific regulatory |
fb1fc7ad LR |
2207 | * domain we keep it for its private use |
2208 | */ | |
7db90f4a | 2209 | if (last_request->initiator == NL80211_REGDOM_SET_BY_DRIVER) |
806a9e39 | 2210 | request_wiphy->regd = rd; |
3e0c3ff3 LR |
2211 | else |
2212 | kfree(rd); | |
2213 | ||
b8295acd LR |
2214 | rd = NULL; |
2215 | ||
a042994d | 2216 | reset_regdomains(false); |
b8295acd LR |
2217 | cfg80211_regdomain = intersected_rd; |
2218 | ||
2219 | return 0; | |
9c96477d LR |
2220 | } |
2221 | ||
f3baed51 | 2222 | return -EINVAL; |
b2e1b302 LR |
2223 | } |
2224 | ||
2225 | ||
fb1fc7ad LR |
2226 | /* |
2227 | * Use this call to set the current regulatory domain. Conflicts with | |
b2e1b302 | 2228 | * multiple drivers can be ironed out later. Caller must've already |
fb1fc7ad LR |
2229 | * kmalloc'd the rd structure. Caller must hold cfg80211_mutex |
2230 | */ | |
a3d2eaf0 | 2231 | int set_regdom(const struct ieee80211_regdomain *rd) |
b2e1b302 | 2232 | { |
b2e1b302 LR |
2233 | int r; |
2234 | ||
761cf7ec LR |
2235 | assert_cfg80211_lock(); |
2236 | ||
abc7381b LR |
2237 | mutex_lock(®_mutex); |
2238 | ||
b2e1b302 LR |
2239 | /* Note that this doesn't update the wiphys, this is done below */ |
2240 | r = __set_regdom(rd); | |
d2372b31 | 2241 | if (r) { |
95908535 KV |
2242 | if (r == -EALREADY) |
2243 | reg_set_request_processed(); | |
2244 | ||
d2372b31 | 2245 | kfree(rd); |
abc7381b | 2246 | mutex_unlock(®_mutex); |
b2e1b302 | 2247 | return r; |
d2372b31 | 2248 | } |
b2e1b302 | 2249 | |
b2e1b302 | 2250 | /* This would make this whole thing pointless */ |
1a919318 | 2251 | BUG_ON(!last_request->intersect && rd != cfg80211_regdomain); |
b2e1b302 LR |
2252 | |
2253 | /* update all wiphys now with the new established regulatory domain */ | |
f6037d09 | 2254 | update_all_wiphy_regulatory(last_request->initiator); |
b2e1b302 | 2255 | |
a01ddafd | 2256 | print_regdomain(cfg80211_regdomain); |
b2e1b302 | 2257 | |
73d54c9e LR |
2258 | nl80211_send_reg_change_event(last_request); |
2259 | ||
b2e253cf LR |
2260 | reg_set_request_processed(); |
2261 | ||
abc7381b LR |
2262 | mutex_unlock(®_mutex); |
2263 | ||
b2e1b302 LR |
2264 | return r; |
2265 | } | |
2266 | ||
4d9d88d1 SJR |
2267 | #ifdef CONFIG_HOTPLUG |
2268 | int reg_device_uevent(struct device *dev, struct kobj_uevent_env *env) | |
2269 | { | |
2270 | if (last_request && !last_request->processed) { | |
2271 | if (add_uevent_var(env, "COUNTRY=%c%c", | |
2272 | last_request->alpha2[0], | |
2273 | last_request->alpha2[1])) | |
2274 | return -ENOMEM; | |
2275 | } | |
2276 | ||
2277 | return 0; | |
2278 | } | |
2279 | #else | |
2280 | int reg_device_uevent(struct device *dev, struct kobj_uevent_env *env) | |
2281 | { | |
2282 | return -ENODEV; | |
2283 | } | |
2284 | #endif /* CONFIG_HOTPLUG */ | |
2285 | ||
57b5ce07 LR |
2286 | void wiphy_regulatory_register(struct wiphy *wiphy) |
2287 | { | |
2288 | assert_cfg80211_lock(); | |
2289 | ||
2290 | mutex_lock(®_mutex); | |
2291 | ||
2292 | if (!reg_dev_ignore_cell_hint(wiphy)) | |
2293 | reg_num_devs_support_basehint++; | |
2294 | ||
14cdf112 | 2295 | wiphy_update_regulatory(wiphy, NL80211_REGDOM_SET_BY_CORE); |
f8a1c774 | 2296 | |
14cdf112 | 2297 | mutex_unlock(®_mutex); |
57b5ce07 LR |
2298 | } |
2299 | ||
a1794390 | 2300 | /* Caller must hold cfg80211_mutex */ |
bfead080 | 2301 | void wiphy_regulatory_deregister(struct wiphy *wiphy) |
3f2355cb | 2302 | { |
0ad8acaf | 2303 | struct wiphy *request_wiphy = NULL; |
806a9e39 | 2304 | |
761cf7ec LR |
2305 | assert_cfg80211_lock(); |
2306 | ||
abc7381b LR |
2307 | mutex_lock(®_mutex); |
2308 | ||
57b5ce07 LR |
2309 | if (!reg_dev_ignore_cell_hint(wiphy)) |
2310 | reg_num_devs_support_basehint--; | |
2311 | ||
0ef9ccdd CW |
2312 | kfree(wiphy->regd); |
2313 | ||
0ad8acaf LR |
2314 | if (last_request) |
2315 | request_wiphy = wiphy_idx_to_wiphy(last_request->wiphy_idx); | |
806a9e39 | 2316 | |
0ef9ccdd | 2317 | if (!request_wiphy || request_wiphy != wiphy) |
abc7381b | 2318 | goto out; |
0ef9ccdd | 2319 | |
806a9e39 | 2320 | last_request->wiphy_idx = WIPHY_IDX_STALE; |
3f2355cb | 2321 | last_request->country_ie_env = ENVIRON_ANY; |
abc7381b LR |
2322 | out: |
2323 | mutex_unlock(®_mutex); | |
3f2355cb LR |
2324 | } |
2325 | ||
a90c7a31 LR |
2326 | static void reg_timeout_work(struct work_struct *work) |
2327 | { | |
1a919318 | 2328 | REG_DBG_PRINT("Timeout while waiting for CRDA to reply, restoring regulatory settings\n"); |
a90c7a31 LR |
2329 | restore_regulatory_settings(true); |
2330 | } | |
2331 | ||
2fcc9f73 | 2332 | int __init regulatory_init(void) |
b2e1b302 | 2333 | { |
bcf4f99b | 2334 | int err = 0; |
734366de | 2335 | |
b2e1b302 LR |
2336 | reg_pdev = platform_device_register_simple("regulatory", 0, NULL, 0); |
2337 | if (IS_ERR(reg_pdev)) | |
2338 | return PTR_ERR(reg_pdev); | |
734366de | 2339 | |
4d9d88d1 SJR |
2340 | reg_pdev->dev.type = ®_device_type; |
2341 | ||
fe33eb39 | 2342 | spin_lock_init(®_requests_lock); |
e38f8a7a | 2343 | spin_lock_init(®_pending_beacons_lock); |
fe33eb39 | 2344 | |
80007efe LR |
2345 | reg_regdb_size_check(); |
2346 | ||
a3d2eaf0 | 2347 | cfg80211_regdomain = cfg80211_world_regdom; |
734366de | 2348 | |
09d989d1 LR |
2349 | user_alpha2[0] = '9'; |
2350 | user_alpha2[1] = '7'; | |
2351 | ||
ae9e4b0d LR |
2352 | /* We always try to get an update for the static regdomain */ |
2353 | err = regulatory_hint_core(cfg80211_regdomain->alpha2); | |
ba25c141 | 2354 | if (err) { |
bcf4f99b LR |
2355 | if (err == -ENOMEM) |
2356 | return err; | |
2357 | /* | |
2358 | * N.B. kobject_uevent_env() can fail mainly for when we're out | |
2359 | * memory which is handled and propagated appropriately above | |
2360 | * but it can also fail during a netlink_broadcast() or during | |
2361 | * early boot for call_usermodehelper(). For now treat these | |
2362 | * errors as non-fatal. | |
2363 | */ | |
e9c0268f | 2364 | pr_err("kobject_uevent_env() was unable to call CRDA during init\n"); |
bcf4f99b LR |
2365 | #ifdef CONFIG_CFG80211_REG_DEBUG |
2366 | /* We want to find out exactly why when debugging */ | |
2367 | WARN_ON(err); | |
734366de | 2368 | #endif |
bcf4f99b | 2369 | } |
734366de | 2370 | |
ae9e4b0d LR |
2371 | /* |
2372 | * Finally, if the user set the module parameter treat it | |
2373 | * as a user hint. | |
2374 | */ | |
2375 | if (!is_world_regdom(ieee80211_regdom)) | |
57b5ce07 LR |
2376 | regulatory_hint_user(ieee80211_regdom, |
2377 | NL80211_USER_REG_HINT_USER); | |
ae9e4b0d | 2378 | |
b2e1b302 LR |
2379 | return 0; |
2380 | } | |
2381 | ||
1a919318 | 2382 | void regulatory_exit(void) |
b2e1b302 | 2383 | { |
fe33eb39 | 2384 | struct regulatory_request *reg_request, *tmp; |
e38f8a7a | 2385 | struct reg_beacon *reg_beacon, *btmp; |
fe33eb39 LR |
2386 | |
2387 | cancel_work_sync(®_work); | |
a90c7a31 | 2388 | cancel_delayed_work_sync(®_timeout); |
fe33eb39 | 2389 | |
9027b149 | 2390 | /* Lock to suppress warnings */ |
a1794390 | 2391 | mutex_lock(&cfg80211_mutex); |
abc7381b | 2392 | mutex_lock(®_mutex); |
a042994d | 2393 | reset_regdomains(true); |
9027b149 JB |
2394 | mutex_unlock(&cfg80211_mutex); |
2395 | mutex_unlock(®_mutex); | |
734366de | 2396 | |
58ebacc6 | 2397 | dev_set_uevent_suppress(®_pdev->dev, true); |
f6037d09 | 2398 | |
b2e1b302 | 2399 | platform_device_unregister(reg_pdev); |
734366de | 2400 | |
fea9bced JB |
2401 | list_for_each_entry_safe(reg_beacon, btmp, ®_pending_beacons, list) { |
2402 | list_del(®_beacon->list); | |
2403 | kfree(reg_beacon); | |
e38f8a7a | 2404 | } |
e38f8a7a | 2405 | |
fea9bced JB |
2406 | list_for_each_entry_safe(reg_beacon, btmp, ®_beacon_list, list) { |
2407 | list_del(®_beacon->list); | |
2408 | kfree(reg_beacon); | |
e38f8a7a LR |
2409 | } |
2410 | ||
fea9bced JB |
2411 | list_for_each_entry_safe(reg_request, tmp, ®_requests_list, list) { |
2412 | list_del(®_request->list); | |
2413 | kfree(reg_request); | |
fe33eb39 | 2414 | } |
8318d78a | 2415 | } |