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Commit | Line | Data |
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8318d78a JB |
1 | /* |
2 | * Copyright 2002-2005, Instant802 Networks, Inc. | |
3 | * Copyright 2005-2006, Devicescape Software, Inc. | |
4 | * Copyright 2007 Johannes Berg <johannes@sipsolutions.net> | |
3b77d5ec | 5 | * Copyright 2008-2011 Luis R. Rodriguez <mcgrof@qca.qualcomm.com> |
8318d78a | 6 | * |
3b77d5ec LR |
7 | * Permission to use, copy, modify, and/or distribute this software for any |
8 | * purpose with or without fee is hereby granted, provided that the above | |
9 | * copyright notice and this permission notice appear in all copies. | |
10 | * | |
11 | * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES | |
12 | * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF | |
13 | * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR | |
14 | * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES | |
15 | * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN | |
16 | * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF | |
17 | * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. | |
8318d78a JB |
18 | */ |
19 | ||
3b77d5ec | 20 | |
b2e1b302 LR |
21 | /** |
22 | * DOC: Wireless regulatory infrastructure | |
8318d78a JB |
23 | * |
24 | * The usual implementation is for a driver to read a device EEPROM to | |
25 | * determine which regulatory domain it should be operating under, then | |
26 | * looking up the allowable channels in a driver-local table and finally | |
27 | * registering those channels in the wiphy structure. | |
28 | * | |
b2e1b302 LR |
29 | * Another set of compliance enforcement is for drivers to use their |
30 | * own compliance limits which can be stored on the EEPROM. The host | |
31 | * driver or firmware may ensure these are used. | |
32 | * | |
33 | * In addition to all this we provide an extra layer of regulatory | |
34 | * conformance. For drivers which do not have any regulatory | |
35 | * information CRDA provides the complete regulatory solution. | |
36 | * For others it provides a community effort on further restrictions | |
37 | * to enhance compliance. | |
38 | * | |
39 | * Note: When number of rules --> infinity we will not be able to | |
40 | * index on alpha2 any more, instead we'll probably have to | |
41 | * rely on some SHA1 checksum of the regdomain for example. | |
42 | * | |
8318d78a | 43 | */ |
e9c0268f JP |
44 | |
45 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt | |
46 | ||
8318d78a | 47 | #include <linux/kernel.h> |
bc3b2d7f | 48 | #include <linux/export.h> |
5a0e3ad6 | 49 | #include <linux/slab.h> |
b2e1b302 | 50 | #include <linux/list.h> |
c61029c7 | 51 | #include <linux/ctype.h> |
b2e1b302 LR |
52 | #include <linux/nl80211.h> |
53 | #include <linux/platform_device.h> | |
d9b93842 | 54 | #include <linux/moduleparam.h> |
b2e1b302 | 55 | #include <net/cfg80211.h> |
8318d78a | 56 | #include "core.h" |
b2e1b302 | 57 | #include "reg.h" |
3b377ea9 | 58 | #include "regdb.h" |
73d54c9e | 59 | #include "nl80211.h" |
8318d78a | 60 | |
4113f751 | 61 | #ifdef CONFIG_CFG80211_REG_DEBUG |
12c5ffb5 JP |
62 | #define REG_DBG_PRINT(format, args...) \ |
63 | printk(KERN_DEBUG pr_fmt(format), ##args) | |
4113f751 | 64 | #else |
8271195e | 65 | #define REG_DBG_PRINT(args...) |
4113f751 LR |
66 | #endif |
67 | ||
a042994d LR |
68 | static struct regulatory_request core_request_world = { |
69 | .initiator = NL80211_REGDOM_SET_BY_CORE, | |
70 | .alpha2[0] = '0', | |
71 | .alpha2[1] = '0', | |
72 | .intersect = false, | |
73 | .processed = true, | |
74 | .country_ie_env = ENVIRON_ANY, | |
75 | }; | |
76 | ||
5166ccd2 | 77 | /* Receipt of information from last regulatory request */ |
a042994d | 78 | static struct regulatory_request *last_request = &core_request_world; |
734366de | 79 | |
b2e1b302 LR |
80 | /* To trigger userspace events */ |
81 | static struct platform_device *reg_pdev; | |
8318d78a | 82 | |
4d9d88d1 SJR |
83 | static struct device_type reg_device_type = { |
84 | .uevent = reg_device_uevent, | |
85 | }; | |
86 | ||
fb1fc7ad LR |
87 | /* |
88 | * Central wireless core regulatory domains, we only need two, | |
734366de | 89 | * the current one and a world regulatory domain in case we have no |
fb1fc7ad LR |
90 | * information to give us an alpha2 |
91 | */ | |
f130347c | 92 | const struct ieee80211_regdomain *cfg80211_regdomain; |
734366de | 93 | |
abc7381b LR |
94 | /* |
95 | * Protects static reg.c components: | |
96 | * - cfg80211_world_regdom | |
97 | * - cfg80211_regdom | |
abc7381b | 98 | * - last_request |
57b5ce07 | 99 | * - reg_num_devs_support_basehint |
abc7381b | 100 | */ |
670b7f11 | 101 | static DEFINE_MUTEX(reg_mutex); |
46a5ebaf | 102 | |
57b5ce07 LR |
103 | /* |
104 | * Number of devices that registered to the core | |
105 | * that support cellular base station regulatory hints | |
106 | */ | |
107 | static int reg_num_devs_support_basehint; | |
108 | ||
46a5ebaf JB |
109 | static inline void assert_reg_lock(void) |
110 | { | |
111 | lockdep_assert_held(®_mutex); | |
112 | } | |
abc7381b | 113 | |
e38f8a7a | 114 | /* Used to queue up regulatory hints */ |
fe33eb39 LR |
115 | static LIST_HEAD(reg_requests_list); |
116 | static spinlock_t reg_requests_lock; | |
117 | ||
e38f8a7a LR |
118 | /* Used to queue up beacon hints for review */ |
119 | static LIST_HEAD(reg_pending_beacons); | |
120 | static spinlock_t reg_pending_beacons_lock; | |
121 | ||
122 | /* Used to keep track of processed beacon hints */ | |
123 | static LIST_HEAD(reg_beacon_list); | |
124 | ||
125 | struct reg_beacon { | |
126 | struct list_head list; | |
127 | struct ieee80211_channel chan; | |
128 | }; | |
129 | ||
f333a7a2 LR |
130 | static void reg_todo(struct work_struct *work); |
131 | static DECLARE_WORK(reg_work, reg_todo); | |
132 | ||
a90c7a31 LR |
133 | static void reg_timeout_work(struct work_struct *work); |
134 | static DECLARE_DELAYED_WORK(reg_timeout, reg_timeout_work); | |
135 | ||
734366de JB |
136 | /* We keep a static world regulatory domain in case of the absence of CRDA */ |
137 | static const struct ieee80211_regdomain world_regdom = { | |
90cdc6df | 138 | .n_reg_rules = 6, |
734366de JB |
139 | .alpha2 = "00", |
140 | .reg_rules = { | |
68798a62 LR |
141 | /* IEEE 802.11b/g, channels 1..11 */ |
142 | REG_RULE(2412-10, 2462+10, 40, 6, 20, 0), | |
43c771a1 JB |
143 | /* IEEE 802.11b/g, channels 12..13. */ |
144 | REG_RULE(2467-10, 2472+10, 40, 6, 20, | |
3fc71f77 LR |
145 | NL80211_RRF_PASSIVE_SCAN | |
146 | NL80211_RRF_NO_IBSS), | |
611b6a82 LR |
147 | /* IEEE 802.11 channel 14 - Only JP enables |
148 | * this and for 802.11b only */ | |
149 | REG_RULE(2484-10, 2484+10, 20, 6, 20, | |
150 | NL80211_RRF_PASSIVE_SCAN | | |
151 | NL80211_RRF_NO_IBSS | | |
152 | NL80211_RRF_NO_OFDM), | |
153 | /* IEEE 802.11a, channel 36..48 */ | |
ec329ace | 154 | REG_RULE(5180-10, 5240+10, 40, 6, 20, |
611b6a82 LR |
155 | NL80211_RRF_PASSIVE_SCAN | |
156 | NL80211_RRF_NO_IBSS), | |
3fc71f77 LR |
157 | |
158 | /* NB: 5260 MHz - 5700 MHz requies DFS */ | |
159 | ||
160 | /* IEEE 802.11a, channel 149..165 */ | |
ec329ace | 161 | REG_RULE(5745-10, 5825+10, 40, 6, 20, |
3fc71f77 LR |
162 | NL80211_RRF_PASSIVE_SCAN | |
163 | NL80211_RRF_NO_IBSS), | |
90cdc6df VK |
164 | |
165 | /* IEEE 802.11ad (60gHz), channels 1..3 */ | |
166 | REG_RULE(56160+2160*1-1080, 56160+2160*3+1080, 2160, 0, 0, 0), | |
734366de JB |
167 | } |
168 | }; | |
169 | ||
a3d2eaf0 JB |
170 | static const struct ieee80211_regdomain *cfg80211_world_regdom = |
171 | &world_regdom; | |
734366de | 172 | |
6ee7d330 | 173 | static char *ieee80211_regdom = "00"; |
09d989d1 | 174 | static char user_alpha2[2]; |
6ee7d330 | 175 | |
734366de JB |
176 | module_param(ieee80211_regdom, charp, 0444); |
177 | MODULE_PARM_DESC(ieee80211_regdom, "IEEE 802.11 regulatory domain code"); | |
178 | ||
a042994d | 179 | static void reset_regdomains(bool full_reset) |
734366de | 180 | { |
942b25cf JB |
181 | /* avoid freeing static information or freeing something twice */ |
182 | if (cfg80211_regdomain == cfg80211_world_regdom) | |
183 | cfg80211_regdomain = NULL; | |
184 | if (cfg80211_world_regdom == &world_regdom) | |
185 | cfg80211_world_regdom = NULL; | |
186 | if (cfg80211_regdomain == &world_regdom) | |
187 | cfg80211_regdomain = NULL; | |
942b25cf JB |
188 | |
189 | kfree(cfg80211_regdomain); | |
190 | kfree(cfg80211_world_regdom); | |
734366de | 191 | |
a3d2eaf0 | 192 | cfg80211_world_regdom = &world_regdom; |
734366de | 193 | cfg80211_regdomain = NULL; |
a042994d LR |
194 | |
195 | if (!full_reset) | |
196 | return; | |
197 | ||
198 | if (last_request != &core_request_world) | |
199 | kfree(last_request); | |
200 | last_request = &core_request_world; | |
734366de JB |
201 | } |
202 | ||
fb1fc7ad LR |
203 | /* |
204 | * Dynamic world regulatory domain requested by the wireless | |
205 | * core upon initialization | |
206 | */ | |
a3d2eaf0 | 207 | static void update_world_regdomain(const struct ieee80211_regdomain *rd) |
734366de | 208 | { |
f6037d09 | 209 | BUG_ON(!last_request); |
734366de | 210 | |
a042994d | 211 | reset_regdomains(false); |
734366de JB |
212 | |
213 | cfg80211_world_regdom = rd; | |
214 | cfg80211_regdomain = rd; | |
215 | } | |
734366de | 216 | |
a3d2eaf0 | 217 | bool is_world_regdom(const char *alpha2) |
b2e1b302 LR |
218 | { |
219 | if (!alpha2) | |
220 | return false; | |
1a919318 | 221 | return alpha2[0] == '0' && alpha2[1] == '0'; |
b2e1b302 | 222 | } |
8318d78a | 223 | |
a3d2eaf0 | 224 | static bool is_alpha2_set(const char *alpha2) |
b2e1b302 LR |
225 | { |
226 | if (!alpha2) | |
227 | return false; | |
1a919318 | 228 | return alpha2[0] && alpha2[1]; |
b2e1b302 | 229 | } |
8318d78a | 230 | |
a3d2eaf0 | 231 | static bool is_unknown_alpha2(const char *alpha2) |
b2e1b302 LR |
232 | { |
233 | if (!alpha2) | |
234 | return false; | |
fb1fc7ad LR |
235 | /* |
236 | * Special case where regulatory domain was built by driver | |
237 | * but a specific alpha2 cannot be determined | |
238 | */ | |
1a919318 | 239 | return alpha2[0] == '9' && alpha2[1] == '9'; |
b2e1b302 | 240 | } |
8318d78a | 241 | |
3f2355cb LR |
242 | static bool is_intersected_alpha2(const char *alpha2) |
243 | { | |
244 | if (!alpha2) | |
245 | return false; | |
fb1fc7ad LR |
246 | /* |
247 | * Special case where regulatory domain is the | |
3f2355cb | 248 | * result of an intersection between two regulatory domain |
fb1fc7ad LR |
249 | * structures |
250 | */ | |
1a919318 | 251 | return alpha2[0] == '9' && alpha2[1] == '8'; |
3f2355cb LR |
252 | } |
253 | ||
a3d2eaf0 | 254 | static bool is_an_alpha2(const char *alpha2) |
b2e1b302 LR |
255 | { |
256 | if (!alpha2) | |
257 | return false; | |
1a919318 | 258 | return isalpha(alpha2[0]) && isalpha(alpha2[1]); |
b2e1b302 | 259 | } |
8318d78a | 260 | |
a3d2eaf0 | 261 | static bool alpha2_equal(const char *alpha2_x, const char *alpha2_y) |
b2e1b302 LR |
262 | { |
263 | if (!alpha2_x || !alpha2_y) | |
264 | return false; | |
1a919318 | 265 | return alpha2_x[0] == alpha2_y[0] && alpha2_x[1] == alpha2_y[1]; |
b2e1b302 LR |
266 | } |
267 | ||
69b1572b | 268 | static bool regdom_changes(const char *alpha2) |
b2e1b302 | 269 | { |
761cf7ec LR |
270 | assert_cfg80211_lock(); |
271 | ||
b2e1b302 LR |
272 | if (!cfg80211_regdomain) |
273 | return true; | |
1a919318 | 274 | return !alpha2_equal(cfg80211_regdomain->alpha2, alpha2); |
b2e1b302 LR |
275 | } |
276 | ||
09d989d1 LR |
277 | /* |
278 | * The NL80211_REGDOM_SET_BY_USER regdom alpha2 is cached, this lets | |
279 | * you know if a valid regulatory hint with NL80211_REGDOM_SET_BY_USER | |
280 | * has ever been issued. | |
281 | */ | |
282 | static bool is_user_regdom_saved(void) | |
283 | { | |
284 | if (user_alpha2[0] == '9' && user_alpha2[1] == '7') | |
285 | return false; | |
286 | ||
287 | /* This would indicate a mistake on the design */ | |
1a919318 | 288 | if (WARN(!is_world_regdom(user_alpha2) && !is_an_alpha2(user_alpha2), |
09d989d1 | 289 | "Unexpected user alpha2: %c%c\n", |
1a919318 | 290 | user_alpha2[0], user_alpha2[1])) |
09d989d1 LR |
291 | return false; |
292 | ||
293 | return true; | |
294 | } | |
295 | ||
e9763c3c JB |
296 | static const struct ieee80211_regdomain * |
297 | reg_copy_regd(const struct ieee80211_regdomain *src_regd) | |
3b377ea9 JL |
298 | { |
299 | struct ieee80211_regdomain *regd; | |
e9763c3c | 300 | int size_of_regd; |
3b377ea9 JL |
301 | unsigned int i; |
302 | ||
82f20856 JB |
303 | size_of_regd = |
304 | sizeof(struct ieee80211_regdomain) + | |
305 | src_regd->n_reg_rules * sizeof(struct ieee80211_reg_rule); | |
3b377ea9 JL |
306 | |
307 | regd = kzalloc(size_of_regd, GFP_KERNEL); | |
308 | if (!regd) | |
e9763c3c | 309 | return ERR_PTR(-ENOMEM); |
3b377ea9 JL |
310 | |
311 | memcpy(regd, src_regd, sizeof(struct ieee80211_regdomain)); | |
312 | ||
313 | for (i = 0; i < src_regd->n_reg_rules; i++) | |
314 | memcpy(®d->reg_rules[i], &src_regd->reg_rules[i], | |
e9763c3c | 315 | sizeof(struct ieee80211_reg_rule)); |
3b377ea9 | 316 | |
e9763c3c | 317 | return regd; |
3b377ea9 JL |
318 | } |
319 | ||
320 | #ifdef CONFIG_CFG80211_INTERNAL_REGDB | |
321 | struct reg_regdb_search_request { | |
322 | char alpha2[2]; | |
323 | struct list_head list; | |
324 | }; | |
325 | ||
326 | static LIST_HEAD(reg_regdb_search_list); | |
368d06f5 | 327 | static DEFINE_MUTEX(reg_regdb_search_mutex); |
3b377ea9 JL |
328 | |
329 | static void reg_regdb_search(struct work_struct *work) | |
330 | { | |
331 | struct reg_regdb_search_request *request; | |
e9763c3c JB |
332 | const struct ieee80211_regdomain *curdom, *regdom = NULL; |
333 | int i; | |
a85d0d7f LR |
334 | |
335 | mutex_lock(&cfg80211_mutex); | |
3b377ea9 | 336 | |
368d06f5 | 337 | mutex_lock(®_regdb_search_mutex); |
3b377ea9 JL |
338 | while (!list_empty(®_regdb_search_list)) { |
339 | request = list_first_entry(®_regdb_search_list, | |
340 | struct reg_regdb_search_request, | |
341 | list); | |
342 | list_del(&request->list); | |
343 | ||
1a919318 | 344 | for (i = 0; i < reg_regdb_size; i++) { |
3b377ea9 JL |
345 | curdom = reg_regdb[i]; |
346 | ||
1a919318 | 347 | if (alpha2_equal(request->alpha2, curdom->alpha2)) { |
e9763c3c | 348 | regdom = reg_copy_regd(curdom); |
3b377ea9 JL |
349 | break; |
350 | } | |
351 | } | |
352 | ||
353 | kfree(request); | |
354 | } | |
368d06f5 | 355 | mutex_unlock(®_regdb_search_mutex); |
a85d0d7f | 356 | |
e9763c3c | 357 | if (!IS_ERR_OR_NULL(regdom)) |
a85d0d7f LR |
358 | set_regdom(regdom); |
359 | ||
360 | mutex_unlock(&cfg80211_mutex); | |
3b377ea9 JL |
361 | } |
362 | ||
363 | static DECLARE_WORK(reg_regdb_work, reg_regdb_search); | |
364 | ||
365 | static void reg_regdb_query(const char *alpha2) | |
366 | { | |
367 | struct reg_regdb_search_request *request; | |
368 | ||
369 | if (!alpha2) | |
370 | return; | |
371 | ||
372 | request = kzalloc(sizeof(struct reg_regdb_search_request), GFP_KERNEL); | |
373 | if (!request) | |
374 | return; | |
375 | ||
376 | memcpy(request->alpha2, alpha2, 2); | |
377 | ||
368d06f5 | 378 | mutex_lock(®_regdb_search_mutex); |
3b377ea9 | 379 | list_add_tail(&request->list, ®_regdb_search_list); |
368d06f5 | 380 | mutex_unlock(®_regdb_search_mutex); |
3b377ea9 JL |
381 | |
382 | schedule_work(®_regdb_work); | |
383 | } | |
80007efe LR |
384 | |
385 | /* Feel free to add any other sanity checks here */ | |
386 | static void reg_regdb_size_check(void) | |
387 | { | |
388 | /* We should ideally BUILD_BUG_ON() but then random builds would fail */ | |
389 | WARN_ONCE(!reg_regdb_size, "db.txt is empty, you should update it..."); | |
390 | } | |
3b377ea9 | 391 | #else |
80007efe | 392 | static inline void reg_regdb_size_check(void) {} |
3b377ea9 JL |
393 | static inline void reg_regdb_query(const char *alpha2) {} |
394 | #endif /* CONFIG_CFG80211_INTERNAL_REGDB */ | |
395 | ||
fb1fc7ad LR |
396 | /* |
397 | * This lets us keep regulatory code which is updated on a regulatory | |
4d9d88d1 SJR |
398 | * basis in userspace. Country information is filled in by |
399 | * reg_device_uevent | |
fb1fc7ad | 400 | */ |
b2e1b302 LR |
401 | static int call_crda(const char *alpha2) |
402 | { | |
b2e1b302 | 403 | if (!is_world_regdom((char *) alpha2)) |
e9c0268f | 404 | pr_info("Calling CRDA for country: %c%c\n", |
b2e1b302 LR |
405 | alpha2[0], alpha2[1]); |
406 | else | |
e9c0268f | 407 | pr_info("Calling CRDA to update world regulatory domain\n"); |
b2e1b302 | 408 | |
3b377ea9 JL |
409 | /* query internal regulatory database (if it exists) */ |
410 | reg_regdb_query(alpha2); | |
411 | ||
4d9d88d1 | 412 | return kobject_uevent(®_pdev->dev.kobj, KOBJ_CHANGE); |
b2e1b302 LR |
413 | } |
414 | ||
b2e1b302 | 415 | /* Used by nl80211 before kmalloc'ing our regulatory domain */ |
a3d2eaf0 | 416 | bool reg_is_valid_request(const char *alpha2) |
b2e1b302 | 417 | { |
61405e97 LR |
418 | assert_cfg80211_lock(); |
419 | ||
f6037d09 JB |
420 | if (!last_request) |
421 | return false; | |
422 | ||
423 | return alpha2_equal(last_request->alpha2, alpha2); | |
b2e1b302 | 424 | } |
8318d78a | 425 | |
b2e1b302 | 426 | /* Sanity check on a regulatory rule */ |
a3d2eaf0 | 427 | static bool is_valid_reg_rule(const struct ieee80211_reg_rule *rule) |
8318d78a | 428 | { |
a3d2eaf0 | 429 | const struct ieee80211_freq_range *freq_range = &rule->freq_range; |
b2e1b302 LR |
430 | u32 freq_diff; |
431 | ||
91e99004 | 432 | if (freq_range->start_freq_khz <= 0 || freq_range->end_freq_khz <= 0) |
b2e1b302 LR |
433 | return false; |
434 | ||
435 | if (freq_range->start_freq_khz > freq_range->end_freq_khz) | |
436 | return false; | |
437 | ||
438 | freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz; | |
439 | ||
bd05f28e | 440 | if (freq_range->end_freq_khz <= freq_range->start_freq_khz || |
1a919318 | 441 | freq_range->max_bandwidth_khz > freq_diff) |
b2e1b302 LR |
442 | return false; |
443 | ||
444 | return true; | |
445 | } | |
446 | ||
a3d2eaf0 | 447 | static bool is_valid_rd(const struct ieee80211_regdomain *rd) |
b2e1b302 | 448 | { |
a3d2eaf0 | 449 | const struct ieee80211_reg_rule *reg_rule = NULL; |
b2e1b302 | 450 | unsigned int i; |
8318d78a | 451 | |
b2e1b302 LR |
452 | if (!rd->n_reg_rules) |
453 | return false; | |
8318d78a | 454 | |
88dc1c3f LR |
455 | if (WARN_ON(rd->n_reg_rules > NL80211_MAX_SUPP_REG_RULES)) |
456 | return false; | |
457 | ||
b2e1b302 LR |
458 | for (i = 0; i < rd->n_reg_rules; i++) { |
459 | reg_rule = &rd->reg_rules[i]; | |
460 | if (!is_valid_reg_rule(reg_rule)) | |
461 | return false; | |
462 | } | |
463 | ||
464 | return true; | |
8318d78a JB |
465 | } |
466 | ||
038659e7 LR |
467 | static bool reg_does_bw_fit(const struct ieee80211_freq_range *freq_range, |
468 | u32 center_freq_khz, | |
469 | u32 bw_khz) | |
b2e1b302 | 470 | { |
038659e7 LR |
471 | u32 start_freq_khz, end_freq_khz; |
472 | ||
473 | start_freq_khz = center_freq_khz - (bw_khz/2); | |
474 | end_freq_khz = center_freq_khz + (bw_khz/2); | |
475 | ||
476 | if (start_freq_khz >= freq_range->start_freq_khz && | |
477 | end_freq_khz <= freq_range->end_freq_khz) | |
478 | return true; | |
479 | ||
480 | return false; | |
b2e1b302 | 481 | } |
8318d78a | 482 | |
0c7dc45d LR |
483 | /** |
484 | * freq_in_rule_band - tells us if a frequency is in a frequency band | |
485 | * @freq_range: frequency rule we want to query | |
486 | * @freq_khz: frequency we are inquiring about | |
487 | * | |
488 | * This lets us know if a specific frequency rule is or is not relevant to | |
489 | * a specific frequency's band. Bands are device specific and artificial | |
64629b9d VK |
490 | * definitions (the "2.4 GHz band", the "5 GHz band" and the "60GHz band"), |
491 | * however it is safe for now to assume that a frequency rule should not be | |
492 | * part of a frequency's band if the start freq or end freq are off by more | |
493 | * than 2 GHz for the 2.4 and 5 GHz bands, and by more than 10 GHz for the | |
494 | * 60 GHz band. | |
0c7dc45d LR |
495 | * This resolution can be lowered and should be considered as we add |
496 | * regulatory rule support for other "bands". | |
497 | **/ | |
498 | static bool freq_in_rule_band(const struct ieee80211_freq_range *freq_range, | |
1a919318 | 499 | u32 freq_khz) |
0c7dc45d LR |
500 | { |
501 | #define ONE_GHZ_IN_KHZ 1000000 | |
64629b9d VK |
502 | /* |
503 | * From 802.11ad: directional multi-gigabit (DMG): | |
504 | * Pertaining to operation in a frequency band containing a channel | |
505 | * with the Channel starting frequency above 45 GHz. | |
506 | */ | |
507 | u32 limit = freq_khz > 45 * ONE_GHZ_IN_KHZ ? | |
508 | 10 * ONE_GHZ_IN_KHZ : 2 * ONE_GHZ_IN_KHZ; | |
509 | if (abs(freq_khz - freq_range->start_freq_khz) <= limit) | |
0c7dc45d | 510 | return true; |
64629b9d | 511 | if (abs(freq_khz - freq_range->end_freq_khz) <= limit) |
0c7dc45d LR |
512 | return true; |
513 | return false; | |
514 | #undef ONE_GHZ_IN_KHZ | |
515 | } | |
516 | ||
fb1fc7ad LR |
517 | /* |
518 | * Helper for regdom_intersect(), this does the real | |
519 | * mathematical intersection fun | |
520 | */ | |
1a919318 JB |
521 | static int reg_rules_intersect(const struct ieee80211_reg_rule *rule1, |
522 | const struct ieee80211_reg_rule *rule2, | |
523 | struct ieee80211_reg_rule *intersected_rule) | |
9c96477d LR |
524 | { |
525 | const struct ieee80211_freq_range *freq_range1, *freq_range2; | |
526 | struct ieee80211_freq_range *freq_range; | |
527 | const struct ieee80211_power_rule *power_rule1, *power_rule2; | |
528 | struct ieee80211_power_rule *power_rule; | |
529 | u32 freq_diff; | |
530 | ||
531 | freq_range1 = &rule1->freq_range; | |
532 | freq_range2 = &rule2->freq_range; | |
533 | freq_range = &intersected_rule->freq_range; | |
534 | ||
535 | power_rule1 = &rule1->power_rule; | |
536 | power_rule2 = &rule2->power_rule; | |
537 | power_rule = &intersected_rule->power_rule; | |
538 | ||
539 | freq_range->start_freq_khz = max(freq_range1->start_freq_khz, | |
1a919318 | 540 | freq_range2->start_freq_khz); |
9c96477d | 541 | freq_range->end_freq_khz = min(freq_range1->end_freq_khz, |
1a919318 | 542 | freq_range2->end_freq_khz); |
9c96477d | 543 | freq_range->max_bandwidth_khz = min(freq_range1->max_bandwidth_khz, |
1a919318 | 544 | freq_range2->max_bandwidth_khz); |
9c96477d LR |
545 | |
546 | freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz; | |
547 | if (freq_range->max_bandwidth_khz > freq_diff) | |
548 | freq_range->max_bandwidth_khz = freq_diff; | |
549 | ||
550 | power_rule->max_eirp = min(power_rule1->max_eirp, | |
551 | power_rule2->max_eirp); | |
552 | power_rule->max_antenna_gain = min(power_rule1->max_antenna_gain, | |
553 | power_rule2->max_antenna_gain); | |
554 | ||
1a919318 | 555 | intersected_rule->flags = rule1->flags | rule2->flags; |
9c96477d LR |
556 | |
557 | if (!is_valid_reg_rule(intersected_rule)) | |
558 | return -EINVAL; | |
559 | ||
560 | return 0; | |
561 | } | |
562 | ||
563 | /** | |
564 | * regdom_intersect - do the intersection between two regulatory domains | |
565 | * @rd1: first regulatory domain | |
566 | * @rd2: second regulatory domain | |
567 | * | |
568 | * Use this function to get the intersection between two regulatory domains. | |
569 | * Once completed we will mark the alpha2 for the rd as intersected, "98", | |
570 | * as no one single alpha2 can represent this regulatory domain. | |
571 | * | |
572 | * Returns a pointer to the regulatory domain structure which will hold the | |
573 | * resulting intersection of rules between rd1 and rd2. We will | |
574 | * kzalloc() this structure for you. | |
575 | */ | |
1a919318 JB |
576 | static struct ieee80211_regdomain * |
577 | regdom_intersect(const struct ieee80211_regdomain *rd1, | |
578 | const struct ieee80211_regdomain *rd2) | |
9c96477d LR |
579 | { |
580 | int r, size_of_regd; | |
581 | unsigned int x, y; | |
582 | unsigned int num_rules = 0, rule_idx = 0; | |
583 | const struct ieee80211_reg_rule *rule1, *rule2; | |
584 | struct ieee80211_reg_rule *intersected_rule; | |
585 | struct ieee80211_regdomain *rd; | |
586 | /* This is just a dummy holder to help us count */ | |
74f53cd8 | 587 | struct ieee80211_reg_rule dummy_rule; |
9c96477d LR |
588 | |
589 | if (!rd1 || !rd2) | |
590 | return NULL; | |
591 | ||
fb1fc7ad LR |
592 | /* |
593 | * First we get a count of the rules we'll need, then we actually | |
9c96477d LR |
594 | * build them. This is to so we can malloc() and free() a |
595 | * regdomain once. The reason we use reg_rules_intersect() here | |
596 | * is it will return -EINVAL if the rule computed makes no sense. | |
fb1fc7ad LR |
597 | * All rules that do check out OK are valid. |
598 | */ | |
9c96477d LR |
599 | |
600 | for (x = 0; x < rd1->n_reg_rules; x++) { | |
601 | rule1 = &rd1->reg_rules[x]; | |
602 | for (y = 0; y < rd2->n_reg_rules; y++) { | |
603 | rule2 = &rd2->reg_rules[y]; | |
74f53cd8 | 604 | if (!reg_rules_intersect(rule1, rule2, &dummy_rule)) |
9c96477d | 605 | num_rules++; |
9c96477d LR |
606 | } |
607 | } | |
608 | ||
609 | if (!num_rules) | |
610 | return NULL; | |
611 | ||
612 | size_of_regd = sizeof(struct ieee80211_regdomain) + | |
82f20856 | 613 | num_rules * sizeof(struct ieee80211_reg_rule); |
9c96477d LR |
614 | |
615 | rd = kzalloc(size_of_regd, GFP_KERNEL); | |
616 | if (!rd) | |
617 | return NULL; | |
618 | ||
8a57fff0 | 619 | for (x = 0; x < rd1->n_reg_rules && rule_idx < num_rules; x++) { |
9c96477d | 620 | rule1 = &rd1->reg_rules[x]; |
8a57fff0 | 621 | for (y = 0; y < rd2->n_reg_rules && rule_idx < num_rules; y++) { |
9c96477d | 622 | rule2 = &rd2->reg_rules[y]; |
fb1fc7ad LR |
623 | /* |
624 | * This time around instead of using the stack lets | |
9c96477d | 625 | * write to the target rule directly saving ourselves |
fb1fc7ad LR |
626 | * a memcpy() |
627 | */ | |
9c96477d | 628 | intersected_rule = &rd->reg_rules[rule_idx]; |
1a919318 | 629 | r = reg_rules_intersect(rule1, rule2, intersected_rule); |
fb1fc7ad LR |
630 | /* |
631 | * No need to memset here the intersected rule here as | |
632 | * we're not using the stack anymore | |
633 | */ | |
9c96477d LR |
634 | if (r) |
635 | continue; | |
636 | rule_idx++; | |
637 | } | |
638 | } | |
639 | ||
640 | if (rule_idx != num_rules) { | |
641 | kfree(rd); | |
642 | return NULL; | |
643 | } | |
644 | ||
645 | rd->n_reg_rules = num_rules; | |
646 | rd->alpha2[0] = '9'; | |
647 | rd->alpha2[1] = '8'; | |
648 | ||
649 | return rd; | |
650 | } | |
651 | ||
fb1fc7ad LR |
652 | /* |
653 | * XXX: add support for the rest of enum nl80211_reg_rule_flags, we may | |
654 | * want to just have the channel structure use these | |
655 | */ | |
b2e1b302 LR |
656 | static u32 map_regdom_flags(u32 rd_flags) |
657 | { | |
658 | u32 channel_flags = 0; | |
659 | if (rd_flags & NL80211_RRF_PASSIVE_SCAN) | |
660 | channel_flags |= IEEE80211_CHAN_PASSIVE_SCAN; | |
661 | if (rd_flags & NL80211_RRF_NO_IBSS) | |
662 | channel_flags |= IEEE80211_CHAN_NO_IBSS; | |
663 | if (rd_flags & NL80211_RRF_DFS) | |
664 | channel_flags |= IEEE80211_CHAN_RADAR; | |
03f6b084 SF |
665 | if (rd_flags & NL80211_RRF_NO_OFDM) |
666 | channel_flags |= IEEE80211_CHAN_NO_OFDM; | |
b2e1b302 LR |
667 | return channel_flags; |
668 | } | |
669 | ||
1fa25e41 LR |
670 | static int freq_reg_info_regd(struct wiphy *wiphy, |
671 | u32 center_freq, | |
038659e7 | 672 | u32 desired_bw_khz, |
1fa25e41 LR |
673 | const struct ieee80211_reg_rule **reg_rule, |
674 | const struct ieee80211_regdomain *custom_regd) | |
8318d78a JB |
675 | { |
676 | int i; | |
0c7dc45d | 677 | bool band_rule_found = false; |
3e0c3ff3 | 678 | const struct ieee80211_regdomain *regd; |
038659e7 LR |
679 | bool bw_fits = false; |
680 | ||
681 | if (!desired_bw_khz) | |
682 | desired_bw_khz = MHZ_TO_KHZ(20); | |
8318d78a | 683 | |
1fa25e41 | 684 | regd = custom_regd ? custom_regd : cfg80211_regdomain; |
3e0c3ff3 | 685 | |
fb1fc7ad LR |
686 | /* |
687 | * Follow the driver's regulatory domain, if present, unless a country | |
688 | * IE has been processed or a user wants to help complaince further | |
689 | */ | |
2784fe91 LR |
690 | if (!custom_regd && |
691 | last_request->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && | |
7db90f4a | 692 | last_request->initiator != NL80211_REGDOM_SET_BY_USER && |
3e0c3ff3 LR |
693 | wiphy->regd) |
694 | regd = wiphy->regd; | |
695 | ||
696 | if (!regd) | |
b2e1b302 LR |
697 | return -EINVAL; |
698 | ||
3e0c3ff3 | 699 | for (i = 0; i < regd->n_reg_rules; i++) { |
b2e1b302 LR |
700 | const struct ieee80211_reg_rule *rr; |
701 | const struct ieee80211_freq_range *fr = NULL; | |
b2e1b302 | 702 | |
3e0c3ff3 | 703 | rr = ®d->reg_rules[i]; |
b2e1b302 | 704 | fr = &rr->freq_range; |
0c7dc45d | 705 | |
fb1fc7ad LR |
706 | /* |
707 | * We only need to know if one frequency rule was | |
0c7dc45d | 708 | * was in center_freq's band, that's enough, so lets |
fb1fc7ad LR |
709 | * not overwrite it once found |
710 | */ | |
0c7dc45d LR |
711 | if (!band_rule_found) |
712 | band_rule_found = freq_in_rule_band(fr, center_freq); | |
713 | ||
1a919318 | 714 | bw_fits = reg_does_bw_fit(fr, center_freq, desired_bw_khz); |
0c7dc45d | 715 | |
038659e7 | 716 | if (band_rule_found && bw_fits) { |
b2e1b302 | 717 | *reg_rule = rr; |
038659e7 | 718 | return 0; |
8318d78a JB |
719 | } |
720 | } | |
721 | ||
0c7dc45d LR |
722 | if (!band_rule_found) |
723 | return -ERANGE; | |
724 | ||
038659e7 | 725 | return -EINVAL; |
b2e1b302 LR |
726 | } |
727 | ||
1a919318 | 728 | int freq_reg_info(struct wiphy *wiphy, u32 center_freq, u32 desired_bw_khz, |
038659e7 | 729 | const struct ieee80211_reg_rule **reg_rule) |
1fa25e41 | 730 | { |
ac46d48e | 731 | assert_cfg80211_lock(); |
1a919318 JB |
732 | |
733 | return freq_reg_info_regd(wiphy, center_freq, desired_bw_khz, | |
734 | reg_rule, NULL); | |
1fa25e41 | 735 | } |
4f366c5d | 736 | EXPORT_SYMBOL(freq_reg_info); |
b2e1b302 | 737 | |
926a0a09 LR |
738 | #ifdef CONFIG_CFG80211_REG_DEBUG |
739 | static const char *reg_initiator_name(enum nl80211_reg_initiator initiator) | |
740 | { | |
741 | switch (initiator) { | |
742 | case NL80211_REGDOM_SET_BY_CORE: | |
743 | return "Set by core"; | |
744 | case NL80211_REGDOM_SET_BY_USER: | |
745 | return "Set by user"; | |
746 | case NL80211_REGDOM_SET_BY_DRIVER: | |
747 | return "Set by driver"; | |
748 | case NL80211_REGDOM_SET_BY_COUNTRY_IE: | |
749 | return "Set by country IE"; | |
750 | default: | |
751 | WARN_ON(1); | |
752 | return "Set by bug"; | |
753 | } | |
754 | } | |
e702d3cf LR |
755 | |
756 | static void chan_reg_rule_print_dbg(struct ieee80211_channel *chan, | |
757 | u32 desired_bw_khz, | |
758 | const struct ieee80211_reg_rule *reg_rule) | |
759 | { | |
760 | const struct ieee80211_power_rule *power_rule; | |
761 | const struct ieee80211_freq_range *freq_range; | |
762 | char max_antenna_gain[32]; | |
763 | ||
764 | power_rule = ®_rule->power_rule; | |
765 | freq_range = ®_rule->freq_range; | |
766 | ||
767 | if (!power_rule->max_antenna_gain) | |
768 | snprintf(max_antenna_gain, 32, "N/A"); | |
769 | else | |
770 | snprintf(max_antenna_gain, 32, "%d", power_rule->max_antenna_gain); | |
771 | ||
1a919318 JB |
772 | REG_DBG_PRINT("Updating information on frequency %d MHz for a %d MHz width channel with regulatory rule:\n", |
773 | chan->center_freq, KHZ_TO_MHZ(desired_bw_khz)); | |
e702d3cf | 774 | |
56e6786e | 775 | REG_DBG_PRINT("%d KHz - %d KHz @ %d KHz), (%s mBi, %d mBm)\n", |
1a919318 JB |
776 | freq_range->start_freq_khz, freq_range->end_freq_khz, |
777 | freq_range->max_bandwidth_khz, max_antenna_gain, | |
e702d3cf LR |
778 | power_rule->max_eirp); |
779 | } | |
780 | #else | |
781 | static void chan_reg_rule_print_dbg(struct ieee80211_channel *chan, | |
782 | u32 desired_bw_khz, | |
783 | const struct ieee80211_reg_rule *reg_rule) | |
784 | { | |
785 | return; | |
786 | } | |
926a0a09 LR |
787 | #endif |
788 | ||
038659e7 LR |
789 | /* |
790 | * Note that right now we assume the desired channel bandwidth | |
791 | * is always 20 MHz for each individual channel (HT40 uses 20 MHz | |
792 | * per channel, the primary and the extension channel). To support | |
793 | * smaller custom bandwidths such as 5 MHz or 10 MHz we'll need a | |
794 | * new ieee80211_channel.target_bw and re run the regulatory check | |
795 | * on the wiphy with the target_bw specified. Then we can simply use | |
796 | * that below for the desired_bw_khz below. | |
797 | */ | |
7ca43d03 LR |
798 | static void handle_channel(struct wiphy *wiphy, |
799 | enum nl80211_reg_initiator initiator, | |
800 | enum ieee80211_band band, | |
a92a3ce7 | 801 | unsigned int chan_idx) |
b2e1b302 LR |
802 | { |
803 | int r; | |
038659e7 LR |
804 | u32 flags, bw_flags = 0; |
805 | u32 desired_bw_khz = MHZ_TO_KHZ(20); | |
b2e1b302 LR |
806 | const struct ieee80211_reg_rule *reg_rule = NULL; |
807 | const struct ieee80211_power_rule *power_rule = NULL; | |
038659e7 | 808 | const struct ieee80211_freq_range *freq_range = NULL; |
a92a3ce7 LR |
809 | struct ieee80211_supported_band *sband; |
810 | struct ieee80211_channel *chan; | |
fe33eb39 | 811 | struct wiphy *request_wiphy = NULL; |
a92a3ce7 | 812 | |
761cf7ec LR |
813 | assert_cfg80211_lock(); |
814 | ||
806a9e39 LR |
815 | request_wiphy = wiphy_idx_to_wiphy(last_request->wiphy_idx); |
816 | ||
a92a3ce7 LR |
817 | sband = wiphy->bands[band]; |
818 | BUG_ON(chan_idx >= sband->n_channels); | |
819 | chan = &sband->channels[chan_idx]; | |
820 | ||
821 | flags = chan->orig_flags; | |
b2e1b302 | 822 | |
1a919318 JB |
823 | r = freq_reg_info(wiphy, MHZ_TO_KHZ(chan->center_freq), |
824 | desired_bw_khz, ®_rule); | |
ca4ffe8f LR |
825 | if (r) { |
826 | /* | |
827 | * We will disable all channels that do not match our | |
25985edc | 828 | * received regulatory rule unless the hint is coming |
ca4ffe8f LR |
829 | * from a Country IE and the Country IE had no information |
830 | * about a band. The IEEE 802.11 spec allows for an AP | |
831 | * to send only a subset of the regulatory rules allowed, | |
832 | * so an AP in the US that only supports 2.4 GHz may only send | |
833 | * a country IE with information for the 2.4 GHz band | |
834 | * while 5 GHz is still supported. | |
835 | */ | |
836 | if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE && | |
837 | r == -ERANGE) | |
838 | return; | |
839 | ||
d91e41b6 | 840 | REG_DBG_PRINT("Disabling freq %d MHz\n", chan->center_freq); |
ca4ffe8f | 841 | chan->flags = IEEE80211_CHAN_DISABLED; |
8318d78a | 842 | return; |
ca4ffe8f | 843 | } |
8318d78a | 844 | |
e702d3cf LR |
845 | chan_reg_rule_print_dbg(chan, desired_bw_khz, reg_rule); |
846 | ||
b2e1b302 | 847 | power_rule = ®_rule->power_rule; |
038659e7 LR |
848 | freq_range = ®_rule->freq_range; |
849 | ||
850 | if (freq_range->max_bandwidth_khz < MHZ_TO_KHZ(40)) | |
851 | bw_flags = IEEE80211_CHAN_NO_HT40; | |
b2e1b302 | 852 | |
7db90f4a | 853 | if (last_request->initiator == NL80211_REGDOM_SET_BY_DRIVER && |
806a9e39 | 854 | request_wiphy && request_wiphy == wiphy && |
5be83de5 | 855 | request_wiphy->flags & WIPHY_FLAG_STRICT_REGULATORY) { |
fb1fc7ad | 856 | /* |
25985edc | 857 | * This guarantees the driver's requested regulatory domain |
f976376d | 858 | * will always be used as a base for further regulatory |
fb1fc7ad LR |
859 | * settings |
860 | */ | |
f976376d | 861 | chan->flags = chan->orig_flags = |
038659e7 | 862 | map_regdom_flags(reg_rule->flags) | bw_flags; |
f976376d LR |
863 | chan->max_antenna_gain = chan->orig_mag = |
864 | (int) MBI_TO_DBI(power_rule->max_antenna_gain); | |
279f0f55 | 865 | chan->max_reg_power = chan->max_power = chan->orig_mpwr = |
f976376d LR |
866 | (int) MBM_TO_DBM(power_rule->max_eirp); |
867 | return; | |
868 | } | |
869 | ||
aa3d7eef | 870 | chan->beacon_found = false; |
038659e7 | 871 | chan->flags = flags | bw_flags | map_regdom_flags(reg_rule->flags); |
1a919318 JB |
872 | chan->max_antenna_gain = |
873 | min_t(int, chan->orig_mag, | |
874 | MBI_TO_DBI(power_rule->max_antenna_gain)); | |
eccc068e | 875 | chan->max_reg_power = (int) MBM_TO_DBM(power_rule->max_eirp); |
5e31fc08 SG |
876 | if (chan->orig_mpwr) { |
877 | /* | |
878 | * Devices that have their own custom regulatory domain | |
879 | * but also use WIPHY_FLAG_STRICT_REGULATORY will follow the | |
880 | * passed country IE power settings. | |
881 | */ | |
882 | if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE && | |
883 | wiphy->flags & WIPHY_FLAG_CUSTOM_REGULATORY && | |
884 | wiphy->flags & WIPHY_FLAG_STRICT_REGULATORY) | |
885 | chan->max_power = chan->max_reg_power; | |
886 | else | |
887 | chan->max_power = min(chan->orig_mpwr, | |
888 | chan->max_reg_power); | |
889 | } else | |
890 | chan->max_power = chan->max_reg_power; | |
8318d78a JB |
891 | } |
892 | ||
1a919318 | 893 | static void handle_band(struct wiphy *wiphy, enum ieee80211_band band, |
7ca43d03 | 894 | enum nl80211_reg_initiator initiator) |
8318d78a | 895 | { |
a92a3ce7 LR |
896 | unsigned int i; |
897 | struct ieee80211_supported_band *sband; | |
898 | ||
899 | BUG_ON(!wiphy->bands[band]); | |
900 | sband = wiphy->bands[band]; | |
8318d78a JB |
901 | |
902 | for (i = 0; i < sband->n_channels; i++) | |
7ca43d03 | 903 | handle_channel(wiphy, initiator, band, i); |
8318d78a JB |
904 | } |
905 | ||
57b5ce07 LR |
906 | static bool reg_request_cell_base(struct regulatory_request *request) |
907 | { | |
908 | if (request->initiator != NL80211_REGDOM_SET_BY_USER) | |
909 | return false; | |
1a919318 | 910 | return request->user_reg_hint_type == NL80211_USER_REG_HINT_CELL_BASE; |
57b5ce07 LR |
911 | } |
912 | ||
913 | bool reg_last_request_cell_base(void) | |
914 | { | |
ebd0fd2b | 915 | bool val; |
1a919318 | 916 | |
57b5ce07 LR |
917 | assert_cfg80211_lock(); |
918 | ||
919 | mutex_lock(®_mutex); | |
ebd0fd2b | 920 | val = reg_request_cell_base(last_request); |
57b5ce07 | 921 | mutex_unlock(®_mutex); |
1a919318 | 922 | |
ebd0fd2b | 923 | return val; |
57b5ce07 LR |
924 | } |
925 | ||
926 | #ifdef CONFIG_CFG80211_CERTIFICATION_ONUS | |
57b5ce07 LR |
927 | /* Core specific check */ |
928 | static int reg_ignore_cell_hint(struct regulatory_request *pending_request) | |
929 | { | |
930 | if (!reg_num_devs_support_basehint) | |
931 | return -EOPNOTSUPP; | |
932 | ||
1a919318 JB |
933 | if (reg_request_cell_base(last_request) && |
934 | !regdom_changes(pending_request->alpha2)) | |
935 | return -EALREADY; | |
936 | ||
57b5ce07 LR |
937 | return 0; |
938 | } | |
939 | ||
940 | /* Device specific check */ | |
941 | static bool reg_dev_ignore_cell_hint(struct wiphy *wiphy) | |
942 | { | |
1a919318 | 943 | return !(wiphy->features & NL80211_FEATURE_CELL_BASE_REG_HINTS); |
57b5ce07 LR |
944 | } |
945 | #else | |
946 | static int reg_ignore_cell_hint(struct regulatory_request *pending_request) | |
947 | { | |
948 | return -EOPNOTSUPP; | |
949 | } | |
1a919318 JB |
950 | |
951 | static bool reg_dev_ignore_cell_hint(struct wiphy *wiphy) | |
57b5ce07 LR |
952 | { |
953 | return true; | |
954 | } | |
955 | #endif | |
956 | ||
957 | ||
7db90f4a LR |
958 | static bool ignore_reg_update(struct wiphy *wiphy, |
959 | enum nl80211_reg_initiator initiator) | |
14b9815a | 960 | { |
926a0a09 | 961 | if (!last_request) { |
1a919318 | 962 | REG_DBG_PRINT("Ignoring regulatory request %s since last_request is not set\n", |
926a0a09 | 963 | reg_initiator_name(initiator)); |
14b9815a | 964 | return true; |
926a0a09 LR |
965 | } |
966 | ||
7db90f4a | 967 | if (initiator == NL80211_REGDOM_SET_BY_CORE && |
926a0a09 | 968 | wiphy->flags & WIPHY_FLAG_CUSTOM_REGULATORY) { |
1a919318 | 969 | REG_DBG_PRINT("Ignoring regulatory request %s since the driver uses its own custom regulatory domain\n", |
926a0a09 | 970 | reg_initiator_name(initiator)); |
14b9815a | 971 | return true; |
926a0a09 LR |
972 | } |
973 | ||
fb1fc7ad LR |
974 | /* |
975 | * wiphy->regd will be set once the device has its own | |
976 | * desired regulatory domain set | |
977 | */ | |
5be83de5 | 978 | if (wiphy->flags & WIPHY_FLAG_STRICT_REGULATORY && !wiphy->regd && |
749b527b | 979 | initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && |
926a0a09 | 980 | !is_world_regdom(last_request->alpha2)) { |
1a919318 | 981 | REG_DBG_PRINT("Ignoring regulatory request %s since the driver requires its own regulatory domain to be set first\n", |
926a0a09 | 982 | reg_initiator_name(initiator)); |
14b9815a | 983 | return true; |
926a0a09 LR |
984 | } |
985 | ||
57b5ce07 LR |
986 | if (reg_request_cell_base(last_request)) |
987 | return reg_dev_ignore_cell_hint(wiphy); | |
988 | ||
14b9815a LR |
989 | return false; |
990 | } | |
991 | ||
1a919318 | 992 | static void handle_reg_beacon(struct wiphy *wiphy, unsigned int chan_idx, |
e38f8a7a LR |
993 | struct reg_beacon *reg_beacon) |
994 | { | |
e38f8a7a LR |
995 | struct ieee80211_supported_band *sband; |
996 | struct ieee80211_channel *chan; | |
6bad8766 LR |
997 | bool channel_changed = false; |
998 | struct ieee80211_channel chan_before; | |
e38f8a7a LR |
999 | |
1000 | assert_cfg80211_lock(); | |
1001 | ||
1002 | sband = wiphy->bands[reg_beacon->chan.band]; | |
1003 | chan = &sband->channels[chan_idx]; | |
1004 | ||
1005 | if (likely(chan->center_freq != reg_beacon->chan.center_freq)) | |
1006 | return; | |
1007 | ||
6bad8766 LR |
1008 | if (chan->beacon_found) |
1009 | return; | |
1010 | ||
1011 | chan->beacon_found = true; | |
1012 | ||
5be83de5 | 1013 | if (wiphy->flags & WIPHY_FLAG_DISABLE_BEACON_HINTS) |
37184244 LR |
1014 | return; |
1015 | ||
6bad8766 LR |
1016 | chan_before.center_freq = chan->center_freq; |
1017 | chan_before.flags = chan->flags; | |
1018 | ||
37184244 | 1019 | if (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN) { |
e38f8a7a | 1020 | chan->flags &= ~IEEE80211_CHAN_PASSIVE_SCAN; |
6bad8766 | 1021 | channel_changed = true; |
e38f8a7a LR |
1022 | } |
1023 | ||
37184244 | 1024 | if (chan->flags & IEEE80211_CHAN_NO_IBSS) { |
e38f8a7a | 1025 | chan->flags &= ~IEEE80211_CHAN_NO_IBSS; |
6bad8766 | 1026 | channel_changed = true; |
e38f8a7a LR |
1027 | } |
1028 | ||
6bad8766 LR |
1029 | if (channel_changed) |
1030 | nl80211_send_beacon_hint_event(wiphy, &chan_before, chan); | |
e38f8a7a LR |
1031 | } |
1032 | ||
1033 | /* | |
1034 | * Called when a scan on a wiphy finds a beacon on | |
1035 | * new channel | |
1036 | */ | |
1037 | static void wiphy_update_new_beacon(struct wiphy *wiphy, | |
1038 | struct reg_beacon *reg_beacon) | |
1039 | { | |
1040 | unsigned int i; | |
1041 | struct ieee80211_supported_band *sband; | |
1042 | ||
1043 | assert_cfg80211_lock(); | |
1044 | ||
1045 | if (!wiphy->bands[reg_beacon->chan.band]) | |
1046 | return; | |
1047 | ||
1048 | sband = wiphy->bands[reg_beacon->chan.band]; | |
1049 | ||
1050 | for (i = 0; i < sband->n_channels; i++) | |
1051 | handle_reg_beacon(wiphy, i, reg_beacon); | |
1052 | } | |
1053 | ||
1054 | /* | |
1055 | * Called upon reg changes or a new wiphy is added | |
1056 | */ | |
1057 | static void wiphy_update_beacon_reg(struct wiphy *wiphy) | |
1058 | { | |
1059 | unsigned int i; | |
1060 | struct ieee80211_supported_band *sband; | |
1061 | struct reg_beacon *reg_beacon; | |
1062 | ||
1063 | assert_cfg80211_lock(); | |
1064 | ||
e38f8a7a LR |
1065 | list_for_each_entry(reg_beacon, ®_beacon_list, list) { |
1066 | if (!wiphy->bands[reg_beacon->chan.band]) | |
1067 | continue; | |
1068 | sband = wiphy->bands[reg_beacon->chan.band]; | |
1069 | for (i = 0; i < sband->n_channels; i++) | |
1070 | handle_reg_beacon(wiphy, i, reg_beacon); | |
1071 | } | |
1072 | } | |
1073 | ||
1074 | static bool reg_is_world_roaming(struct wiphy *wiphy) | |
1075 | { | |
1076 | if (is_world_regdom(cfg80211_regdomain->alpha2) || | |
1077 | (wiphy->regd && is_world_regdom(wiphy->regd->alpha2))) | |
1078 | return true; | |
b1ed8ddd LR |
1079 | if (last_request && |
1080 | last_request->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && | |
5be83de5 | 1081 | wiphy->flags & WIPHY_FLAG_CUSTOM_REGULATORY) |
e38f8a7a LR |
1082 | return true; |
1083 | return false; | |
1084 | } | |
1085 | ||
1086 | /* Reap the advantages of previously found beacons */ | |
1087 | static void reg_process_beacons(struct wiphy *wiphy) | |
1088 | { | |
b1ed8ddd LR |
1089 | /* |
1090 | * Means we are just firing up cfg80211, so no beacons would | |
1091 | * have been processed yet. | |
1092 | */ | |
1093 | if (!last_request) | |
1094 | return; | |
e38f8a7a LR |
1095 | if (!reg_is_world_roaming(wiphy)) |
1096 | return; | |
1097 | wiphy_update_beacon_reg(wiphy); | |
1098 | } | |
1099 | ||
1a919318 | 1100 | static bool is_ht40_allowed(struct ieee80211_channel *chan) |
038659e7 LR |
1101 | { |
1102 | if (!chan) | |
1a919318 | 1103 | return false; |
038659e7 | 1104 | if (chan->flags & IEEE80211_CHAN_DISABLED) |
1a919318 | 1105 | return false; |
038659e7 | 1106 | /* This would happen when regulatory rules disallow HT40 completely */ |
1a919318 | 1107 | return !(chan->flags & IEEE80211_CHAN_NO_HT40); |
038659e7 LR |
1108 | } |
1109 | ||
1110 | static void reg_process_ht_flags_channel(struct wiphy *wiphy, | |
1111 | enum ieee80211_band band, | |
1112 | unsigned int chan_idx) | |
1113 | { | |
1114 | struct ieee80211_supported_band *sband; | |
1115 | struct ieee80211_channel *channel; | |
1116 | struct ieee80211_channel *channel_before = NULL, *channel_after = NULL; | |
1117 | unsigned int i; | |
1118 | ||
1119 | assert_cfg80211_lock(); | |
1120 | ||
1121 | sband = wiphy->bands[band]; | |
1122 | BUG_ON(chan_idx >= sband->n_channels); | |
1123 | channel = &sband->channels[chan_idx]; | |
1124 | ||
1a919318 | 1125 | if (!is_ht40_allowed(channel)) { |
038659e7 LR |
1126 | channel->flags |= IEEE80211_CHAN_NO_HT40; |
1127 | return; | |
1128 | } | |
1129 | ||
1130 | /* | |
1131 | * We need to ensure the extension channels exist to | |
1132 | * be able to use HT40- or HT40+, this finds them (or not) | |
1133 | */ | |
1134 | for (i = 0; i < sband->n_channels; i++) { | |
1135 | struct ieee80211_channel *c = &sband->channels[i]; | |
1a919318 | 1136 | |
038659e7 LR |
1137 | if (c->center_freq == (channel->center_freq - 20)) |
1138 | channel_before = c; | |
1139 | if (c->center_freq == (channel->center_freq + 20)) | |
1140 | channel_after = c; | |
1141 | } | |
1142 | ||
1143 | /* | |
1144 | * Please note that this assumes target bandwidth is 20 MHz, | |
1145 | * if that ever changes we also need to change the below logic | |
1146 | * to include that as well. | |
1147 | */ | |
1a919318 | 1148 | if (!is_ht40_allowed(channel_before)) |
689da1b3 | 1149 | channel->flags |= IEEE80211_CHAN_NO_HT40MINUS; |
038659e7 | 1150 | else |
689da1b3 | 1151 | channel->flags &= ~IEEE80211_CHAN_NO_HT40MINUS; |
038659e7 | 1152 | |
1a919318 | 1153 | if (!is_ht40_allowed(channel_after)) |
689da1b3 | 1154 | channel->flags |= IEEE80211_CHAN_NO_HT40PLUS; |
038659e7 | 1155 | else |
689da1b3 | 1156 | channel->flags &= ~IEEE80211_CHAN_NO_HT40PLUS; |
038659e7 LR |
1157 | } |
1158 | ||
1159 | static void reg_process_ht_flags_band(struct wiphy *wiphy, | |
1160 | enum ieee80211_band band) | |
1161 | { | |
1162 | unsigned int i; | |
1163 | struct ieee80211_supported_band *sband; | |
1164 | ||
1165 | BUG_ON(!wiphy->bands[band]); | |
1166 | sband = wiphy->bands[band]; | |
1167 | ||
1168 | for (i = 0; i < sband->n_channels; i++) | |
1169 | reg_process_ht_flags_channel(wiphy, band, i); | |
1170 | } | |
1171 | ||
1172 | static void reg_process_ht_flags(struct wiphy *wiphy) | |
1173 | { | |
1174 | enum ieee80211_band band; | |
1175 | ||
1176 | if (!wiphy) | |
1177 | return; | |
1178 | ||
1179 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) { | |
1180 | if (wiphy->bands[band]) | |
1181 | reg_process_ht_flags_band(wiphy, band); | |
1182 | } | |
1183 | ||
1184 | } | |
1185 | ||
eac03e38 SN |
1186 | static void wiphy_update_regulatory(struct wiphy *wiphy, |
1187 | enum nl80211_reg_initiator initiator) | |
b2e1b302 LR |
1188 | { |
1189 | enum ieee80211_band band; | |
d46e5b1d | 1190 | |
eac03e38 SN |
1191 | assert_reg_lock(); |
1192 | ||
7db90f4a | 1193 | if (ignore_reg_update(wiphy, initiator)) |
a203c2aa SN |
1194 | return; |
1195 | ||
b68e6b3b LR |
1196 | last_request->dfs_region = cfg80211_regdomain->dfs_region; |
1197 | ||
b2e1b302 | 1198 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) { |
8318d78a | 1199 | if (wiphy->bands[band]) |
7ca43d03 | 1200 | handle_band(wiphy, band, initiator); |
b2e1b302 | 1201 | } |
a203c2aa | 1202 | |
e38f8a7a | 1203 | reg_process_beacons(wiphy); |
038659e7 | 1204 | reg_process_ht_flags(wiphy); |
1a919318 | 1205 | |
560e28e1 | 1206 | if (wiphy->reg_notifier) |
716f9392 | 1207 | wiphy->reg_notifier(wiphy, last_request); |
b2e1b302 LR |
1208 | } |
1209 | ||
d7549cbb SN |
1210 | static void update_all_wiphy_regulatory(enum nl80211_reg_initiator initiator) |
1211 | { | |
1212 | struct cfg80211_registered_device *rdev; | |
4a38994f | 1213 | struct wiphy *wiphy; |
d7549cbb | 1214 | |
4a38994f RM |
1215 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) { |
1216 | wiphy = &rdev->wiphy; | |
1217 | wiphy_update_regulatory(wiphy, initiator); | |
1218 | /* | |
1219 | * Regulatory updates set by CORE are ignored for custom | |
1220 | * regulatory cards. Let us notify the changes to the driver, | |
1221 | * as some drivers used this to restore its orig_* reg domain. | |
1222 | */ | |
1223 | if (initiator == NL80211_REGDOM_SET_BY_CORE && | |
1224 | wiphy->flags & WIPHY_FLAG_CUSTOM_REGULATORY && | |
1225 | wiphy->reg_notifier) | |
1226 | wiphy->reg_notifier(wiphy, last_request); | |
1227 | } | |
d7549cbb SN |
1228 | } |
1229 | ||
1fa25e41 LR |
1230 | static void handle_channel_custom(struct wiphy *wiphy, |
1231 | enum ieee80211_band band, | |
1232 | unsigned int chan_idx, | |
1233 | const struct ieee80211_regdomain *regd) | |
1234 | { | |
1235 | int r; | |
038659e7 LR |
1236 | u32 desired_bw_khz = MHZ_TO_KHZ(20); |
1237 | u32 bw_flags = 0; | |
1fa25e41 LR |
1238 | const struct ieee80211_reg_rule *reg_rule = NULL; |
1239 | const struct ieee80211_power_rule *power_rule = NULL; | |
038659e7 | 1240 | const struct ieee80211_freq_range *freq_range = NULL; |
1fa25e41 LR |
1241 | struct ieee80211_supported_band *sband; |
1242 | struct ieee80211_channel *chan; | |
1243 | ||
abc7381b | 1244 | assert_reg_lock(); |
ac46d48e | 1245 | |
1fa25e41 LR |
1246 | sband = wiphy->bands[band]; |
1247 | BUG_ON(chan_idx >= sband->n_channels); | |
1248 | chan = &sband->channels[chan_idx]; | |
1249 | ||
1a919318 JB |
1250 | r = freq_reg_info_regd(wiphy, MHZ_TO_KHZ(chan->center_freq), |
1251 | desired_bw_khz, ®_rule, regd); | |
1fa25e41 LR |
1252 | |
1253 | if (r) { | |
1a919318 JB |
1254 | REG_DBG_PRINT("Disabling freq %d MHz as custom regd has no rule that fits a %d MHz wide channel\n", |
1255 | chan->center_freq, KHZ_TO_MHZ(desired_bw_khz)); | |
1fa25e41 LR |
1256 | chan->flags = IEEE80211_CHAN_DISABLED; |
1257 | return; | |
1258 | } | |
1259 | ||
e702d3cf LR |
1260 | chan_reg_rule_print_dbg(chan, desired_bw_khz, reg_rule); |
1261 | ||
1fa25e41 | 1262 | power_rule = ®_rule->power_rule; |
038659e7 LR |
1263 | freq_range = ®_rule->freq_range; |
1264 | ||
1265 | if (freq_range->max_bandwidth_khz < MHZ_TO_KHZ(40)) | |
1266 | bw_flags = IEEE80211_CHAN_NO_HT40; | |
1fa25e41 | 1267 | |
038659e7 | 1268 | chan->flags |= map_regdom_flags(reg_rule->flags) | bw_flags; |
1fa25e41 | 1269 | chan->max_antenna_gain = (int) MBI_TO_DBI(power_rule->max_antenna_gain); |
279f0f55 FF |
1270 | chan->max_reg_power = chan->max_power = |
1271 | (int) MBM_TO_DBM(power_rule->max_eirp); | |
1fa25e41 LR |
1272 | } |
1273 | ||
1274 | static void handle_band_custom(struct wiphy *wiphy, enum ieee80211_band band, | |
1275 | const struct ieee80211_regdomain *regd) | |
1276 | { | |
1277 | unsigned int i; | |
1278 | struct ieee80211_supported_band *sband; | |
1279 | ||
1280 | BUG_ON(!wiphy->bands[band]); | |
1281 | sband = wiphy->bands[band]; | |
1282 | ||
1283 | for (i = 0; i < sband->n_channels; i++) | |
1284 | handle_channel_custom(wiphy, band, i, regd); | |
1285 | } | |
1286 | ||
1287 | /* Used by drivers prior to wiphy registration */ | |
1288 | void wiphy_apply_custom_regulatory(struct wiphy *wiphy, | |
1289 | const struct ieee80211_regdomain *regd) | |
1290 | { | |
1291 | enum ieee80211_band band; | |
bbcf3f02 | 1292 | unsigned int bands_set = 0; |
ac46d48e | 1293 | |
abc7381b | 1294 | mutex_lock(®_mutex); |
1fa25e41 | 1295 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) { |
bbcf3f02 LR |
1296 | if (!wiphy->bands[band]) |
1297 | continue; | |
1298 | handle_band_custom(wiphy, band, regd); | |
1299 | bands_set++; | |
b2e1b302 | 1300 | } |
abc7381b | 1301 | mutex_unlock(®_mutex); |
bbcf3f02 LR |
1302 | |
1303 | /* | |
1304 | * no point in calling this if it won't have any effect | |
1a919318 | 1305 | * on your device's supported bands. |
bbcf3f02 LR |
1306 | */ |
1307 | WARN_ON(!bands_set); | |
b2e1b302 | 1308 | } |
1fa25e41 LR |
1309 | EXPORT_SYMBOL(wiphy_apply_custom_regulatory); |
1310 | ||
fb1fc7ad LR |
1311 | /* |
1312 | * Return value which can be used by ignore_request() to indicate | |
1313 | * it has been determined we should intersect two regulatory domains | |
1314 | */ | |
9c96477d LR |
1315 | #define REG_INTERSECT 1 |
1316 | ||
84fa4f43 JB |
1317 | /* This has the logic which determines when a new request |
1318 | * should be ignored. */ | |
2f92cd2e LR |
1319 | static int ignore_request(struct wiphy *wiphy, |
1320 | struct regulatory_request *pending_request) | |
84fa4f43 | 1321 | { |
806a9e39 | 1322 | struct wiphy *last_wiphy = NULL; |
761cf7ec LR |
1323 | |
1324 | assert_cfg80211_lock(); | |
1325 | ||
84fa4f43 JB |
1326 | /* All initial requests are respected */ |
1327 | if (!last_request) | |
1328 | return 0; | |
1329 | ||
2f92cd2e | 1330 | switch (pending_request->initiator) { |
7db90f4a | 1331 | case NL80211_REGDOM_SET_BY_CORE: |
09d989d1 | 1332 | return 0; |
7db90f4a | 1333 | case NL80211_REGDOM_SET_BY_COUNTRY_IE: |
57b5ce07 LR |
1334 | if (reg_request_cell_base(last_request)) { |
1335 | /* Trust a Cell base station over the AP's country IE */ | |
1336 | if (regdom_changes(pending_request->alpha2)) | |
1337 | return -EOPNOTSUPP; | |
1338 | return -EALREADY; | |
1339 | } | |
1340 | ||
806a9e39 LR |
1341 | last_wiphy = wiphy_idx_to_wiphy(last_request->wiphy_idx); |
1342 | ||
2f92cd2e | 1343 | if (unlikely(!is_an_alpha2(pending_request->alpha2))) |
84fa4f43 | 1344 | return -EINVAL; |
7db90f4a LR |
1345 | if (last_request->initiator == |
1346 | NL80211_REGDOM_SET_BY_COUNTRY_IE) { | |
806a9e39 | 1347 | if (last_wiphy != wiphy) { |
84fa4f43 JB |
1348 | /* |
1349 | * Two cards with two APs claiming different | |
1fe90b03 | 1350 | * Country IE alpha2s. We could |
84fa4f43 JB |
1351 | * intersect them, but that seems unlikely |
1352 | * to be correct. Reject second one for now. | |
1353 | */ | |
2f92cd2e | 1354 | if (regdom_changes(pending_request->alpha2)) |
84fa4f43 JB |
1355 | return -EOPNOTSUPP; |
1356 | return -EALREADY; | |
1357 | } | |
fb1fc7ad LR |
1358 | /* |
1359 | * Two consecutive Country IE hints on the same wiphy. | |
1360 | * This should be picked up early by the driver/stack | |
1361 | */ | |
2f92cd2e | 1362 | if (WARN_ON(regdom_changes(pending_request->alpha2))) |
84fa4f43 JB |
1363 | return 0; |
1364 | return -EALREADY; | |
1365 | } | |
a171fba4 | 1366 | return 0; |
7db90f4a LR |
1367 | case NL80211_REGDOM_SET_BY_DRIVER: |
1368 | if (last_request->initiator == NL80211_REGDOM_SET_BY_CORE) { | |
2f92cd2e | 1369 | if (regdom_changes(pending_request->alpha2)) |
e74b1e7f | 1370 | return 0; |
84fa4f43 | 1371 | return -EALREADY; |
e74b1e7f | 1372 | } |
fff32c04 LR |
1373 | |
1374 | /* | |
1375 | * This would happen if you unplug and plug your card | |
1376 | * back in or if you add a new device for which the previously | |
1377 | * loaded card also agrees on the regulatory domain. | |
1378 | */ | |
7db90f4a | 1379 | if (last_request->initiator == NL80211_REGDOM_SET_BY_DRIVER && |
2f92cd2e | 1380 | !regdom_changes(pending_request->alpha2)) |
fff32c04 LR |
1381 | return -EALREADY; |
1382 | ||
3e0c3ff3 | 1383 | return REG_INTERSECT; |
7db90f4a | 1384 | case NL80211_REGDOM_SET_BY_USER: |
57b5ce07 LR |
1385 | if (reg_request_cell_base(pending_request)) |
1386 | return reg_ignore_cell_hint(pending_request); | |
1387 | ||
1388 | if (reg_request_cell_base(last_request)) | |
1389 | return -EOPNOTSUPP; | |
1390 | ||
7db90f4a | 1391 | if (last_request->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) |
9c96477d | 1392 | return REG_INTERSECT; |
fb1fc7ad LR |
1393 | /* |
1394 | * If the user knows better the user should set the regdom | |
1395 | * to their country before the IE is picked up | |
1396 | */ | |
7db90f4a | 1397 | if (last_request->initiator == NL80211_REGDOM_SET_BY_USER && |
1a919318 | 1398 | last_request->intersect) |
3f2355cb | 1399 | return -EOPNOTSUPP; |
fb1fc7ad LR |
1400 | /* |
1401 | * Process user requests only after previous user/driver/core | |
1402 | * requests have been processed | |
1403 | */ | |
1a919318 JB |
1404 | if ((last_request->initiator == NL80211_REGDOM_SET_BY_CORE || |
1405 | last_request->initiator == NL80211_REGDOM_SET_BY_DRIVER || | |
1406 | last_request->initiator == NL80211_REGDOM_SET_BY_USER) && | |
1407 | regdom_changes(last_request->alpha2)) | |
1408 | return -EAGAIN; | |
5eebade6 | 1409 | |
baeb66fe | 1410 | if (!regdom_changes(pending_request->alpha2)) |
e74b1e7f LR |
1411 | return -EALREADY; |
1412 | ||
84fa4f43 JB |
1413 | return 0; |
1414 | } | |
1415 | ||
1416 | return -EINVAL; | |
1417 | } | |
1418 | ||
b2e253cf LR |
1419 | static void reg_set_request_processed(void) |
1420 | { | |
1421 | bool need_more_processing = false; | |
1422 | ||
1423 | last_request->processed = true; | |
1424 | ||
1425 | spin_lock(®_requests_lock); | |
1426 | if (!list_empty(®_requests_list)) | |
1427 | need_more_processing = true; | |
1428 | spin_unlock(®_requests_lock); | |
1429 | ||
a90c7a31 | 1430 | if (last_request->initiator == NL80211_REGDOM_SET_BY_USER) |
fe20b39e | 1431 | cancel_delayed_work(®_timeout); |
a90c7a31 | 1432 | |
b2e253cf LR |
1433 | if (need_more_processing) |
1434 | schedule_work(®_work); | |
1435 | } | |
1436 | ||
d1c96a9a LR |
1437 | /** |
1438 | * __regulatory_hint - hint to the wireless core a regulatory domain | |
1439 | * @wiphy: if the hint comes from country information from an AP, this | |
1440 | * is required to be set to the wiphy that received the information | |
28da32d7 | 1441 | * @pending_request: the regulatory request currently being processed |
d1c96a9a LR |
1442 | * |
1443 | * The Wireless subsystem can use this function to hint to the wireless core | |
28da32d7 | 1444 | * what it believes should be the current regulatory domain. |
d1c96a9a LR |
1445 | * |
1446 | * Returns zero if all went fine, %-EALREADY if a regulatory domain had | |
1447 | * already been set or other standard error codes. | |
1448 | * | |
abc7381b | 1449 | * Caller must hold &cfg80211_mutex and ®_mutex |
d1c96a9a | 1450 | */ |
28da32d7 LR |
1451 | static int __regulatory_hint(struct wiphy *wiphy, |
1452 | struct regulatory_request *pending_request) | |
b2e1b302 | 1453 | { |
e9763c3c | 1454 | const struct ieee80211_regdomain *regd; |
9c96477d | 1455 | bool intersect = false; |
b2e1b302 LR |
1456 | int r = 0; |
1457 | ||
761cf7ec LR |
1458 | assert_cfg80211_lock(); |
1459 | ||
2f92cd2e | 1460 | r = ignore_request(wiphy, pending_request); |
9c96477d | 1461 | |
3e0c3ff3 | 1462 | if (r == REG_INTERSECT) { |
7db90f4a LR |
1463 | if (pending_request->initiator == |
1464 | NL80211_REGDOM_SET_BY_DRIVER) { | |
e9763c3c JB |
1465 | regd = reg_copy_regd(cfg80211_regdomain); |
1466 | if (IS_ERR(regd)) { | |
d951c1dd | 1467 | kfree(pending_request); |
e9763c3c | 1468 | return PTR_ERR(regd); |
d951c1dd | 1469 | } |
e9763c3c | 1470 | wiphy->regd = regd; |
3e0c3ff3 | 1471 | } |
9c96477d | 1472 | intersect = true; |
3e0c3ff3 | 1473 | } else if (r) { |
fb1fc7ad LR |
1474 | /* |
1475 | * If the regulatory domain being requested by the | |
3e0c3ff3 | 1476 | * driver has already been set just copy it to the |
fb1fc7ad LR |
1477 | * wiphy |
1478 | */ | |
28da32d7 | 1479 | if (r == -EALREADY && |
7db90f4a LR |
1480 | pending_request->initiator == |
1481 | NL80211_REGDOM_SET_BY_DRIVER) { | |
e9763c3c JB |
1482 | regd = reg_copy_regd(cfg80211_regdomain); |
1483 | if (IS_ERR(regd)) { | |
d951c1dd | 1484 | kfree(pending_request); |
e9763c3c | 1485 | return PTR_ERR(regd); |
d951c1dd | 1486 | } |
3e0c3ff3 | 1487 | r = -EALREADY; |
e9763c3c | 1488 | wiphy->regd = regd; |
3e0c3ff3 LR |
1489 | goto new_request; |
1490 | } | |
d951c1dd | 1491 | kfree(pending_request); |
b2e1b302 | 1492 | return r; |
3e0c3ff3 | 1493 | } |
b2e1b302 | 1494 | |
3e0c3ff3 | 1495 | new_request: |
a042994d LR |
1496 | if (last_request != &core_request_world) |
1497 | kfree(last_request); | |
5203cdb6 | 1498 | |
d951c1dd LR |
1499 | last_request = pending_request; |
1500 | last_request->intersect = intersect; | |
5203cdb6 | 1501 | |
d951c1dd | 1502 | pending_request = NULL; |
3e0c3ff3 | 1503 | |
09d989d1 LR |
1504 | if (last_request->initiator == NL80211_REGDOM_SET_BY_USER) { |
1505 | user_alpha2[0] = last_request->alpha2[0]; | |
1506 | user_alpha2[1] = last_request->alpha2[1]; | |
1507 | } | |
1508 | ||
3e0c3ff3 | 1509 | /* When r == REG_INTERSECT we do need to call CRDA */ |
73d54c9e LR |
1510 | if (r < 0) { |
1511 | /* | |
1512 | * Since CRDA will not be called in this case as we already | |
1513 | * have applied the requested regulatory domain before we just | |
1514 | * inform userspace we have processed the request | |
1515 | */ | |
b2e253cf | 1516 | if (r == -EALREADY) { |
73d54c9e | 1517 | nl80211_send_reg_change_event(last_request); |
b2e253cf LR |
1518 | reg_set_request_processed(); |
1519 | } | |
3e0c3ff3 | 1520 | return r; |
73d54c9e | 1521 | } |
3e0c3ff3 | 1522 | |
d951c1dd | 1523 | return call_crda(last_request->alpha2); |
b2e1b302 LR |
1524 | } |
1525 | ||
30a548c7 | 1526 | /* This processes *all* regulatory hints */ |
8848bef0 LR |
1527 | static void reg_process_hint(struct regulatory_request *reg_request, |
1528 | enum nl80211_reg_initiator reg_initiator) | |
fe33eb39 LR |
1529 | { |
1530 | int r = 0; | |
1531 | struct wiphy *wiphy = NULL; | |
1532 | ||
1533 | BUG_ON(!reg_request->alpha2); | |
1534 | ||
fe33eb39 LR |
1535 | if (wiphy_idx_valid(reg_request->wiphy_idx)) |
1536 | wiphy = wiphy_idx_to_wiphy(reg_request->wiphy_idx); | |
1537 | ||
1a919318 | 1538 | if (reg_initiator == NL80211_REGDOM_SET_BY_DRIVER && !wiphy) { |
d951c1dd | 1539 | kfree(reg_request); |
b0e2880b | 1540 | return; |
fe33eb39 LR |
1541 | } |
1542 | ||
28da32d7 | 1543 | r = __regulatory_hint(wiphy, reg_request); |
fe33eb39 | 1544 | /* This is required so that the orig_* parameters are saved */ |
5be83de5 | 1545 | if (r == -EALREADY && wiphy && |
a90c7a31 | 1546 | wiphy->flags & WIPHY_FLAG_STRICT_REGULATORY) { |
8848bef0 | 1547 | wiphy_update_regulatory(wiphy, reg_initiator); |
a90c7a31 LR |
1548 | return; |
1549 | } | |
1550 | ||
1551 | /* | |
1552 | * We only time out user hints, given that they should be the only | |
1553 | * source of bogus requests. | |
1554 | */ | |
1a919318 | 1555 | if (r != -EALREADY && reg_initiator == NL80211_REGDOM_SET_BY_USER) |
a90c7a31 | 1556 | schedule_delayed_work(®_timeout, msecs_to_jiffies(3142)); |
fe33eb39 LR |
1557 | } |
1558 | ||
b2e253cf LR |
1559 | /* |
1560 | * Processes regulatory hints, this is all the NL80211_REGDOM_SET_BY_* | |
1561 | * Regulatory hints come on a first come first serve basis and we | |
1562 | * must process each one atomically. | |
1563 | */ | |
fe33eb39 | 1564 | static void reg_process_pending_hints(void) |
b0e2880b | 1565 | { |
fe33eb39 | 1566 | struct regulatory_request *reg_request; |
fe33eb39 | 1567 | |
b0e2880b LR |
1568 | mutex_lock(&cfg80211_mutex); |
1569 | mutex_lock(®_mutex); | |
1570 | ||
b2e253cf LR |
1571 | /* When last_request->processed becomes true this will be rescheduled */ |
1572 | if (last_request && !last_request->processed) { | |
1a919318 | 1573 | REG_DBG_PRINT("Pending regulatory request, waiting for it to be processed...\n"); |
b2e253cf LR |
1574 | goto out; |
1575 | } | |
1576 | ||
fe33eb39 | 1577 | spin_lock(®_requests_lock); |
fe33eb39 | 1578 | |
b2e253cf | 1579 | if (list_empty(®_requests_list)) { |
d951c1dd | 1580 | spin_unlock(®_requests_lock); |
b2e253cf | 1581 | goto out; |
fe33eb39 | 1582 | } |
b2e253cf LR |
1583 | |
1584 | reg_request = list_first_entry(®_requests_list, | |
1585 | struct regulatory_request, | |
1586 | list); | |
1587 | list_del_init(®_request->list); | |
1588 | ||
fe33eb39 | 1589 | spin_unlock(®_requests_lock); |
b0e2880b | 1590 | |
8848bef0 | 1591 | reg_process_hint(reg_request, reg_request->initiator); |
b2e253cf LR |
1592 | |
1593 | out: | |
b0e2880b LR |
1594 | mutex_unlock(®_mutex); |
1595 | mutex_unlock(&cfg80211_mutex); | |
fe33eb39 LR |
1596 | } |
1597 | ||
e38f8a7a LR |
1598 | /* Processes beacon hints -- this has nothing to do with country IEs */ |
1599 | static void reg_process_pending_beacon_hints(void) | |
1600 | { | |
79c97e97 | 1601 | struct cfg80211_registered_device *rdev; |
e38f8a7a LR |
1602 | struct reg_beacon *pending_beacon, *tmp; |
1603 | ||
abc7381b LR |
1604 | /* |
1605 | * No need to hold the reg_mutex here as we just touch wiphys | |
1606 | * and do not read or access regulatory variables. | |
1607 | */ | |
e38f8a7a LR |
1608 | mutex_lock(&cfg80211_mutex); |
1609 | ||
1610 | /* This goes through the _pending_ beacon list */ | |
1611 | spin_lock_bh(®_pending_beacons_lock); | |
1612 | ||
e38f8a7a LR |
1613 | list_for_each_entry_safe(pending_beacon, tmp, |
1614 | ®_pending_beacons, list) { | |
e38f8a7a LR |
1615 | list_del_init(&pending_beacon->list); |
1616 | ||
1617 | /* Applies the beacon hint to current wiphys */ | |
79c97e97 JB |
1618 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) |
1619 | wiphy_update_new_beacon(&rdev->wiphy, pending_beacon); | |
e38f8a7a LR |
1620 | |
1621 | /* Remembers the beacon hint for new wiphys or reg changes */ | |
1622 | list_add_tail(&pending_beacon->list, ®_beacon_list); | |
1623 | } | |
1624 | ||
1625 | spin_unlock_bh(®_pending_beacons_lock); | |
e38f8a7a LR |
1626 | mutex_unlock(&cfg80211_mutex); |
1627 | } | |
1628 | ||
fe33eb39 LR |
1629 | static void reg_todo(struct work_struct *work) |
1630 | { | |
1631 | reg_process_pending_hints(); | |
e38f8a7a | 1632 | reg_process_pending_beacon_hints(); |
fe33eb39 LR |
1633 | } |
1634 | ||
fe33eb39 LR |
1635 | static void queue_regulatory_request(struct regulatory_request *request) |
1636 | { | |
c61029c7 JL |
1637 | if (isalpha(request->alpha2[0])) |
1638 | request->alpha2[0] = toupper(request->alpha2[0]); | |
1639 | if (isalpha(request->alpha2[1])) | |
1640 | request->alpha2[1] = toupper(request->alpha2[1]); | |
1641 | ||
fe33eb39 LR |
1642 | spin_lock(®_requests_lock); |
1643 | list_add_tail(&request->list, ®_requests_list); | |
1644 | spin_unlock(®_requests_lock); | |
1645 | ||
1646 | schedule_work(®_work); | |
1647 | } | |
1648 | ||
09d989d1 LR |
1649 | /* |
1650 | * Core regulatory hint -- happens during cfg80211_init() | |
1651 | * and when we restore regulatory settings. | |
1652 | */ | |
ba25c141 LR |
1653 | static int regulatory_hint_core(const char *alpha2) |
1654 | { | |
1655 | struct regulatory_request *request; | |
1656 | ||
1a919318 | 1657 | request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); |
ba25c141 LR |
1658 | if (!request) |
1659 | return -ENOMEM; | |
1660 | ||
1661 | request->alpha2[0] = alpha2[0]; | |
1662 | request->alpha2[1] = alpha2[1]; | |
7db90f4a | 1663 | request->initiator = NL80211_REGDOM_SET_BY_CORE; |
ba25c141 | 1664 | |
31e99729 | 1665 | queue_regulatory_request(request); |
5078b2e3 | 1666 | |
fe33eb39 | 1667 | return 0; |
ba25c141 LR |
1668 | } |
1669 | ||
fe33eb39 | 1670 | /* User hints */ |
57b5ce07 LR |
1671 | int regulatory_hint_user(const char *alpha2, |
1672 | enum nl80211_user_reg_hint_type user_reg_hint_type) | |
b2e1b302 | 1673 | { |
fe33eb39 LR |
1674 | struct regulatory_request *request; |
1675 | ||
be3d4810 | 1676 | BUG_ON(!alpha2); |
b2e1b302 | 1677 | |
fe33eb39 LR |
1678 | request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); |
1679 | if (!request) | |
1680 | return -ENOMEM; | |
1681 | ||
1682 | request->wiphy_idx = WIPHY_IDX_STALE; | |
1683 | request->alpha2[0] = alpha2[0]; | |
1684 | request->alpha2[1] = alpha2[1]; | |
e12822e1 | 1685 | request->initiator = NL80211_REGDOM_SET_BY_USER; |
57b5ce07 | 1686 | request->user_reg_hint_type = user_reg_hint_type; |
fe33eb39 LR |
1687 | |
1688 | queue_regulatory_request(request); | |
1689 | ||
1690 | return 0; | |
1691 | } | |
1692 | ||
1693 | /* Driver hints */ | |
1694 | int regulatory_hint(struct wiphy *wiphy, const char *alpha2) | |
1695 | { | |
1696 | struct regulatory_request *request; | |
1697 | ||
1698 | BUG_ON(!alpha2); | |
1699 | BUG_ON(!wiphy); | |
1700 | ||
1701 | request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); | |
1702 | if (!request) | |
1703 | return -ENOMEM; | |
1704 | ||
1705 | request->wiphy_idx = get_wiphy_idx(wiphy); | |
1706 | ||
1707 | /* Must have registered wiphy first */ | |
1708 | BUG_ON(!wiphy_idx_valid(request->wiphy_idx)); | |
1709 | ||
1710 | request->alpha2[0] = alpha2[0]; | |
1711 | request->alpha2[1] = alpha2[1]; | |
7db90f4a | 1712 | request->initiator = NL80211_REGDOM_SET_BY_DRIVER; |
fe33eb39 LR |
1713 | |
1714 | queue_regulatory_request(request); | |
1715 | ||
1716 | return 0; | |
b2e1b302 LR |
1717 | } |
1718 | EXPORT_SYMBOL(regulatory_hint); | |
1719 | ||
4b44c8bc LR |
1720 | /* |
1721 | * We hold wdev_lock() here so we cannot hold cfg80211_mutex() and | |
1722 | * therefore cannot iterate over the rdev list here. | |
1723 | */ | |
1a919318 JB |
1724 | void regulatory_hint_11d(struct wiphy *wiphy, enum ieee80211_band band, |
1725 | const u8 *country_ie, u8 country_ie_len) | |
3f2355cb | 1726 | { |
3f2355cb | 1727 | char alpha2[2]; |
3f2355cb | 1728 | enum environment_cap env = ENVIRON_ANY; |
fe33eb39 | 1729 | struct regulatory_request *request; |
3f2355cb | 1730 | |
abc7381b | 1731 | mutex_lock(®_mutex); |
3f2355cb | 1732 | |
9828b017 LR |
1733 | if (unlikely(!last_request)) |
1734 | goto out; | |
d335fe63 | 1735 | |
3f2355cb LR |
1736 | /* IE len must be evenly divisible by 2 */ |
1737 | if (country_ie_len & 0x01) | |
1738 | goto out; | |
1739 | ||
1740 | if (country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN) | |
1741 | goto out; | |
1742 | ||
3f2355cb LR |
1743 | alpha2[0] = country_ie[0]; |
1744 | alpha2[1] = country_ie[1]; | |
1745 | ||
1746 | if (country_ie[2] == 'I') | |
1747 | env = ENVIRON_INDOOR; | |
1748 | else if (country_ie[2] == 'O') | |
1749 | env = ENVIRON_OUTDOOR; | |
1750 | ||
fb1fc7ad | 1751 | /* |
8b19e6ca | 1752 | * We will run this only upon a successful connection on cfg80211. |
4b44c8bc LR |
1753 | * We leave conflict resolution to the workqueue, where can hold |
1754 | * cfg80211_mutex. | |
fb1fc7ad | 1755 | */ |
cc0b6fe8 | 1756 | if (likely(last_request->initiator == |
1a919318 JB |
1757 | NL80211_REGDOM_SET_BY_COUNTRY_IE && |
1758 | wiphy_idx_valid(last_request->wiphy_idx))) | |
4b44c8bc | 1759 | goto out; |
3f2355cb | 1760 | |
fe33eb39 LR |
1761 | request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); |
1762 | if (!request) | |
f9f9b6e3 | 1763 | goto out; |
fe33eb39 | 1764 | |
fe33eb39 | 1765 | request->wiphy_idx = get_wiphy_idx(wiphy); |
4f366c5d JL |
1766 | request->alpha2[0] = alpha2[0]; |
1767 | request->alpha2[1] = alpha2[1]; | |
7db90f4a | 1768 | request->initiator = NL80211_REGDOM_SET_BY_COUNTRY_IE; |
fe33eb39 LR |
1769 | request->country_ie_env = env; |
1770 | ||
fe33eb39 | 1771 | queue_regulatory_request(request); |
3f2355cb | 1772 | out: |
abc7381b | 1773 | mutex_unlock(®_mutex); |
3f2355cb | 1774 | } |
b2e1b302 | 1775 | |
09d989d1 LR |
1776 | static void restore_alpha2(char *alpha2, bool reset_user) |
1777 | { | |
1778 | /* indicates there is no alpha2 to consider for restoration */ | |
1779 | alpha2[0] = '9'; | |
1780 | alpha2[1] = '7'; | |
1781 | ||
1782 | /* The user setting has precedence over the module parameter */ | |
1783 | if (is_user_regdom_saved()) { | |
1784 | /* Unless we're asked to ignore it and reset it */ | |
1785 | if (reset_user) { | |
1a919318 | 1786 | REG_DBG_PRINT("Restoring regulatory settings including user preference\n"); |
09d989d1 LR |
1787 | user_alpha2[0] = '9'; |
1788 | user_alpha2[1] = '7'; | |
1789 | ||
1790 | /* | |
1791 | * If we're ignoring user settings, we still need to | |
1792 | * check the module parameter to ensure we put things | |
1793 | * back as they were for a full restore. | |
1794 | */ | |
1795 | if (!is_world_regdom(ieee80211_regdom)) { | |
1a919318 JB |
1796 | REG_DBG_PRINT("Keeping preference on module parameter ieee80211_regdom: %c%c\n", |
1797 | ieee80211_regdom[0], ieee80211_regdom[1]); | |
09d989d1 LR |
1798 | alpha2[0] = ieee80211_regdom[0]; |
1799 | alpha2[1] = ieee80211_regdom[1]; | |
1800 | } | |
1801 | } else { | |
1a919318 JB |
1802 | REG_DBG_PRINT("Restoring regulatory settings while preserving user preference for: %c%c\n", |
1803 | user_alpha2[0], user_alpha2[1]); | |
09d989d1 LR |
1804 | alpha2[0] = user_alpha2[0]; |
1805 | alpha2[1] = user_alpha2[1]; | |
1806 | } | |
1807 | } else if (!is_world_regdom(ieee80211_regdom)) { | |
1a919318 JB |
1808 | REG_DBG_PRINT("Keeping preference on module parameter ieee80211_regdom: %c%c\n", |
1809 | ieee80211_regdom[0], ieee80211_regdom[1]); | |
09d989d1 LR |
1810 | alpha2[0] = ieee80211_regdom[0]; |
1811 | alpha2[1] = ieee80211_regdom[1]; | |
1812 | } else | |
d91e41b6 | 1813 | REG_DBG_PRINT("Restoring regulatory settings\n"); |
09d989d1 LR |
1814 | } |
1815 | ||
5ce543d1 RM |
1816 | static void restore_custom_reg_settings(struct wiphy *wiphy) |
1817 | { | |
1818 | struct ieee80211_supported_band *sband; | |
1819 | enum ieee80211_band band; | |
1820 | struct ieee80211_channel *chan; | |
1821 | int i; | |
1822 | ||
1823 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) { | |
1824 | sband = wiphy->bands[band]; | |
1825 | if (!sband) | |
1826 | continue; | |
1827 | for (i = 0; i < sband->n_channels; i++) { | |
1828 | chan = &sband->channels[i]; | |
1829 | chan->flags = chan->orig_flags; | |
1830 | chan->max_antenna_gain = chan->orig_mag; | |
1831 | chan->max_power = chan->orig_mpwr; | |
899852af | 1832 | chan->beacon_found = false; |
5ce543d1 RM |
1833 | } |
1834 | } | |
1835 | } | |
1836 | ||
09d989d1 LR |
1837 | /* |
1838 | * Restoring regulatory settings involves ingoring any | |
1839 | * possibly stale country IE information and user regulatory | |
1840 | * settings if so desired, this includes any beacon hints | |
1841 | * learned as we could have traveled outside to another country | |
1842 | * after disconnection. To restore regulatory settings we do | |
1843 | * exactly what we did at bootup: | |
1844 | * | |
1845 | * - send a core regulatory hint | |
1846 | * - send a user regulatory hint if applicable | |
1847 | * | |
1848 | * Device drivers that send a regulatory hint for a specific country | |
1849 | * keep their own regulatory domain on wiphy->regd so that does does | |
1850 | * not need to be remembered. | |
1851 | */ | |
1852 | static void restore_regulatory_settings(bool reset_user) | |
1853 | { | |
1854 | char alpha2[2]; | |
cee0bec5 | 1855 | char world_alpha2[2]; |
09d989d1 | 1856 | struct reg_beacon *reg_beacon, *btmp; |
14609555 LR |
1857 | struct regulatory_request *reg_request, *tmp; |
1858 | LIST_HEAD(tmp_reg_req_list); | |
5ce543d1 | 1859 | struct cfg80211_registered_device *rdev; |
09d989d1 LR |
1860 | |
1861 | mutex_lock(&cfg80211_mutex); | |
1862 | mutex_lock(®_mutex); | |
1863 | ||
a042994d | 1864 | reset_regdomains(true); |
09d989d1 LR |
1865 | restore_alpha2(alpha2, reset_user); |
1866 | ||
14609555 LR |
1867 | /* |
1868 | * If there's any pending requests we simply | |
1869 | * stash them to a temporary pending queue and | |
1870 | * add then after we've restored regulatory | |
1871 | * settings. | |
1872 | */ | |
1873 | spin_lock(®_requests_lock); | |
fea9bced JB |
1874 | list_for_each_entry_safe(reg_request, tmp, ®_requests_list, list) { |
1875 | if (reg_request->initiator != NL80211_REGDOM_SET_BY_USER) | |
1876 | continue; | |
1877 | list_move_tail(®_request->list, &tmp_reg_req_list); | |
14609555 LR |
1878 | } |
1879 | spin_unlock(®_requests_lock); | |
1880 | ||
09d989d1 LR |
1881 | /* Clear beacon hints */ |
1882 | spin_lock_bh(®_pending_beacons_lock); | |
fea9bced JB |
1883 | list_for_each_entry_safe(reg_beacon, btmp, ®_pending_beacons, list) { |
1884 | list_del(®_beacon->list); | |
1885 | kfree(reg_beacon); | |
09d989d1 LR |
1886 | } |
1887 | spin_unlock_bh(®_pending_beacons_lock); | |
1888 | ||
fea9bced JB |
1889 | list_for_each_entry_safe(reg_beacon, btmp, ®_beacon_list, list) { |
1890 | list_del(®_beacon->list); | |
1891 | kfree(reg_beacon); | |
09d989d1 LR |
1892 | } |
1893 | ||
1894 | /* First restore to the basic regulatory settings */ | |
1895 | cfg80211_regdomain = cfg80211_world_regdom; | |
cee0bec5 DS |
1896 | world_alpha2[0] = cfg80211_regdomain->alpha2[0]; |
1897 | world_alpha2[1] = cfg80211_regdomain->alpha2[1]; | |
09d989d1 | 1898 | |
5ce543d1 RM |
1899 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) { |
1900 | if (rdev->wiphy.flags & WIPHY_FLAG_CUSTOM_REGULATORY) | |
1901 | restore_custom_reg_settings(&rdev->wiphy); | |
1902 | } | |
1903 | ||
09d989d1 LR |
1904 | mutex_unlock(®_mutex); |
1905 | mutex_unlock(&cfg80211_mutex); | |
1906 | ||
cee0bec5 | 1907 | regulatory_hint_core(world_alpha2); |
09d989d1 LR |
1908 | |
1909 | /* | |
1910 | * This restores the ieee80211_regdom module parameter | |
1911 | * preference or the last user requested regulatory | |
1912 | * settings, user regulatory settings takes precedence. | |
1913 | */ | |
1914 | if (is_an_alpha2(alpha2)) | |
57b5ce07 | 1915 | regulatory_hint_user(user_alpha2, NL80211_USER_REG_HINT_USER); |
09d989d1 | 1916 | |
14609555 LR |
1917 | if (list_empty(&tmp_reg_req_list)) |
1918 | return; | |
1919 | ||
1920 | mutex_lock(&cfg80211_mutex); | |
1921 | mutex_lock(®_mutex); | |
1922 | ||
1923 | spin_lock(®_requests_lock); | |
1924 | list_for_each_entry_safe(reg_request, tmp, &tmp_reg_req_list, list) { | |
1a919318 JB |
1925 | REG_DBG_PRINT("Adding request for country %c%c back into the queue\n", |
1926 | reg_request->alpha2[0], reg_request->alpha2[1]); | |
00a9ac4c | 1927 | list_move_tail(®_request->list, ®_requests_list); |
14609555 LR |
1928 | } |
1929 | spin_unlock(®_requests_lock); | |
1930 | ||
1931 | mutex_unlock(®_mutex); | |
1932 | mutex_unlock(&cfg80211_mutex); | |
1933 | ||
1934 | REG_DBG_PRINT("Kicking the queue\n"); | |
1935 | ||
1936 | schedule_work(®_work); | |
1937 | } | |
09d989d1 LR |
1938 | |
1939 | void regulatory_hint_disconnect(void) | |
1940 | { | |
1a919318 | 1941 | REG_DBG_PRINT("All devices are disconnected, going to restore regulatory settings\n"); |
09d989d1 LR |
1942 | restore_regulatory_settings(false); |
1943 | } | |
1944 | ||
e38f8a7a LR |
1945 | static bool freq_is_chan_12_13_14(u16 freq) |
1946 | { | |
59eb21a6 BR |
1947 | if (freq == ieee80211_channel_to_frequency(12, IEEE80211_BAND_2GHZ) || |
1948 | freq == ieee80211_channel_to_frequency(13, IEEE80211_BAND_2GHZ) || | |
1949 | freq == ieee80211_channel_to_frequency(14, IEEE80211_BAND_2GHZ)) | |
e38f8a7a LR |
1950 | return true; |
1951 | return false; | |
1952 | } | |
1953 | ||
1954 | int regulatory_hint_found_beacon(struct wiphy *wiphy, | |
1955 | struct ieee80211_channel *beacon_chan, | |
1956 | gfp_t gfp) | |
1957 | { | |
1958 | struct reg_beacon *reg_beacon; | |
1959 | ||
1a919318 JB |
1960 | if (beacon_chan->beacon_found || |
1961 | beacon_chan->flags & IEEE80211_CHAN_RADAR || | |
e38f8a7a | 1962 | (beacon_chan->band == IEEE80211_BAND_2GHZ && |
1a919318 | 1963 | !freq_is_chan_12_13_14(beacon_chan->center_freq))) |
e38f8a7a LR |
1964 | return 0; |
1965 | ||
1966 | reg_beacon = kzalloc(sizeof(struct reg_beacon), gfp); | |
1967 | if (!reg_beacon) | |
1968 | return -ENOMEM; | |
1969 | ||
1a919318 | 1970 | REG_DBG_PRINT("Found new beacon on frequency: %d MHz (Ch %d) on %s\n", |
4113f751 LR |
1971 | beacon_chan->center_freq, |
1972 | ieee80211_frequency_to_channel(beacon_chan->center_freq), | |
1973 | wiphy_name(wiphy)); | |
1974 | ||
e38f8a7a | 1975 | memcpy(®_beacon->chan, beacon_chan, |
1a919318 | 1976 | sizeof(struct ieee80211_channel)); |
e38f8a7a LR |
1977 | |
1978 | /* | |
1979 | * Since we can be called from BH or and non-BH context | |
1980 | * we must use spin_lock_bh() | |
1981 | */ | |
1982 | spin_lock_bh(®_pending_beacons_lock); | |
1983 | list_add_tail(®_beacon->list, ®_pending_beacons); | |
1984 | spin_unlock_bh(®_pending_beacons_lock); | |
1985 | ||
1986 | schedule_work(®_work); | |
1987 | ||
1988 | return 0; | |
1989 | } | |
1990 | ||
a3d2eaf0 | 1991 | static void print_rd_rules(const struct ieee80211_regdomain *rd) |
b2e1b302 LR |
1992 | { |
1993 | unsigned int i; | |
a3d2eaf0 JB |
1994 | const struct ieee80211_reg_rule *reg_rule = NULL; |
1995 | const struct ieee80211_freq_range *freq_range = NULL; | |
1996 | const struct ieee80211_power_rule *power_rule = NULL; | |
b2e1b302 | 1997 | |
6653325a | 1998 | pr_info(" (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)\n"); |
b2e1b302 LR |
1999 | |
2000 | for (i = 0; i < rd->n_reg_rules; i++) { | |
2001 | reg_rule = &rd->reg_rules[i]; | |
2002 | freq_range = ®_rule->freq_range; | |
2003 | power_rule = ®_rule->power_rule; | |
2004 | ||
fb1fc7ad LR |
2005 | /* |
2006 | * There may not be documentation for max antenna gain | |
2007 | * in certain regions | |
2008 | */ | |
b2e1b302 | 2009 | if (power_rule->max_antenna_gain) |
6653325a | 2010 | pr_info(" (%d KHz - %d KHz @ %d KHz), (%d mBi, %d mBm)\n", |
b2e1b302 LR |
2011 | freq_range->start_freq_khz, |
2012 | freq_range->end_freq_khz, | |
2013 | freq_range->max_bandwidth_khz, | |
2014 | power_rule->max_antenna_gain, | |
2015 | power_rule->max_eirp); | |
2016 | else | |
6653325a | 2017 | pr_info(" (%d KHz - %d KHz @ %d KHz), (N/A, %d mBm)\n", |
b2e1b302 LR |
2018 | freq_range->start_freq_khz, |
2019 | freq_range->end_freq_khz, | |
2020 | freq_range->max_bandwidth_khz, | |
2021 | power_rule->max_eirp); | |
2022 | } | |
2023 | } | |
2024 | ||
8b60b078 LR |
2025 | bool reg_supported_dfs_region(u8 dfs_region) |
2026 | { | |
2027 | switch (dfs_region) { | |
2028 | case NL80211_DFS_UNSET: | |
2029 | case NL80211_DFS_FCC: | |
2030 | case NL80211_DFS_ETSI: | |
2031 | case NL80211_DFS_JP: | |
2032 | return true; | |
2033 | default: | |
2034 | REG_DBG_PRINT("Ignoring uknown DFS master region: %d\n", | |
2035 | dfs_region); | |
2036 | return false; | |
2037 | } | |
2038 | } | |
2039 | ||
2040 | static void print_dfs_region(u8 dfs_region) | |
2041 | { | |
2042 | if (!dfs_region) | |
2043 | return; | |
2044 | ||
2045 | switch (dfs_region) { | |
2046 | case NL80211_DFS_FCC: | |
2047 | pr_info(" DFS Master region FCC"); | |
2048 | break; | |
2049 | case NL80211_DFS_ETSI: | |
2050 | pr_info(" DFS Master region ETSI"); | |
2051 | break; | |
2052 | case NL80211_DFS_JP: | |
2053 | pr_info(" DFS Master region JP"); | |
2054 | break; | |
2055 | default: | |
1a919318 | 2056 | pr_info(" DFS Master region Unknown"); |
8b60b078 LR |
2057 | break; |
2058 | } | |
2059 | } | |
2060 | ||
a3d2eaf0 | 2061 | static void print_regdomain(const struct ieee80211_regdomain *rd) |
b2e1b302 LR |
2062 | { |
2063 | ||
3f2355cb | 2064 | if (is_intersected_alpha2(rd->alpha2)) { |
7db90f4a LR |
2065 | if (last_request->initiator == |
2066 | NL80211_REGDOM_SET_BY_COUNTRY_IE) { | |
79c97e97 JB |
2067 | struct cfg80211_registered_device *rdev; |
2068 | rdev = cfg80211_rdev_by_wiphy_idx( | |
806a9e39 | 2069 | last_request->wiphy_idx); |
79c97e97 | 2070 | if (rdev) { |
e9c0268f | 2071 | pr_info("Current regulatory domain updated by AP to: %c%c\n", |
79c97e97 JB |
2072 | rdev->country_ie_alpha2[0], |
2073 | rdev->country_ie_alpha2[1]); | |
3f2355cb | 2074 | } else |
e9c0268f | 2075 | pr_info("Current regulatory domain intersected:\n"); |
3f2355cb | 2076 | } else |
e9c0268f | 2077 | pr_info("Current regulatory domain intersected:\n"); |
1a919318 | 2078 | } else if (is_world_regdom(rd->alpha2)) { |
e9c0268f | 2079 | pr_info("World regulatory domain updated:\n"); |
1a919318 | 2080 | } else { |
b2e1b302 | 2081 | if (is_unknown_alpha2(rd->alpha2)) |
e9c0268f | 2082 | pr_info("Regulatory domain changed to driver built-in settings (unknown country)\n"); |
57b5ce07 LR |
2083 | else { |
2084 | if (reg_request_cell_base(last_request)) | |
1a919318 | 2085 | pr_info("Regulatory domain changed to country: %c%c by Cell Station\n", |
57b5ce07 LR |
2086 | rd->alpha2[0], rd->alpha2[1]); |
2087 | else | |
1a919318 | 2088 | pr_info("Regulatory domain changed to country: %c%c\n", |
57b5ce07 LR |
2089 | rd->alpha2[0], rd->alpha2[1]); |
2090 | } | |
b2e1b302 | 2091 | } |
1a919318 | 2092 | |
8b60b078 | 2093 | print_dfs_region(rd->dfs_region); |
b2e1b302 LR |
2094 | print_rd_rules(rd); |
2095 | } | |
2096 | ||
2df78167 | 2097 | static void print_regdomain_info(const struct ieee80211_regdomain *rd) |
b2e1b302 | 2098 | { |
e9c0268f | 2099 | pr_info("Regulatory domain: %c%c\n", rd->alpha2[0], rd->alpha2[1]); |
b2e1b302 LR |
2100 | print_rd_rules(rd); |
2101 | } | |
2102 | ||
d2372b31 | 2103 | /* Takes ownership of rd only if it doesn't fail */ |
a3d2eaf0 | 2104 | static int __set_regdom(const struct ieee80211_regdomain *rd) |
b2e1b302 | 2105 | { |
e9763c3c | 2106 | const struct ieee80211_regdomain *regd; |
9c96477d | 2107 | const struct ieee80211_regdomain *intersected_rd = NULL; |
806a9e39 | 2108 | struct wiphy *request_wiphy; |
b2e1b302 LR |
2109 | /* Some basic sanity checks first */ |
2110 | ||
b2e1b302 | 2111 | if (is_world_regdom(rd->alpha2)) { |
f6037d09 | 2112 | if (WARN_ON(!reg_is_valid_request(rd->alpha2))) |
b2e1b302 LR |
2113 | return -EINVAL; |
2114 | update_world_regdomain(rd); | |
2115 | return 0; | |
2116 | } | |
b2e1b302 LR |
2117 | |
2118 | if (!is_alpha2_set(rd->alpha2) && !is_an_alpha2(rd->alpha2) && | |
1a919318 | 2119 | !is_unknown_alpha2(rd->alpha2)) |
b2e1b302 LR |
2120 | return -EINVAL; |
2121 | ||
f6037d09 | 2122 | if (!last_request) |
b2e1b302 LR |
2123 | return -EINVAL; |
2124 | ||
fb1fc7ad LR |
2125 | /* |
2126 | * Lets only bother proceeding on the same alpha2 if the current | |
3f2355cb | 2127 | * rd is non static (it means CRDA was present and was used last) |
fb1fc7ad LR |
2128 | * and the pending request came in from a country IE |
2129 | */ | |
7db90f4a | 2130 | if (last_request->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE) { |
fb1fc7ad LR |
2131 | /* |
2132 | * If someone else asked us to change the rd lets only bother | |
2133 | * checking if the alpha2 changes if CRDA was already called | |
2134 | */ | |
baeb66fe | 2135 | if (!regdom_changes(rd->alpha2)) |
95908535 | 2136 | return -EALREADY; |
3f2355cb LR |
2137 | } |
2138 | ||
fb1fc7ad LR |
2139 | /* |
2140 | * Now lets set the regulatory domain, update all driver channels | |
b2e1b302 LR |
2141 | * and finally inform them of what we have done, in case they want |
2142 | * to review or adjust their own settings based on their own | |
fb1fc7ad LR |
2143 | * internal EEPROM data |
2144 | */ | |
b2e1b302 | 2145 | |
f6037d09 | 2146 | if (WARN_ON(!reg_is_valid_request(rd->alpha2))) |
b2e1b302 LR |
2147 | return -EINVAL; |
2148 | ||
8375af3b | 2149 | if (!is_valid_rd(rd)) { |
e9c0268f | 2150 | pr_err("Invalid regulatory domain detected:\n"); |
8375af3b LR |
2151 | print_regdomain_info(rd); |
2152 | return -EINVAL; | |
b2e1b302 LR |
2153 | } |
2154 | ||
806a9e39 | 2155 | request_wiphy = wiphy_idx_to_wiphy(last_request->wiphy_idx); |
0bac71af LR |
2156 | if (!request_wiphy && |
2157 | (last_request->initiator == NL80211_REGDOM_SET_BY_DRIVER || | |
2158 | last_request->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE)) { | |
2159 | schedule_delayed_work(®_timeout, 0); | |
de3584bd JB |
2160 | return -ENODEV; |
2161 | } | |
806a9e39 | 2162 | |
b8295acd | 2163 | if (!last_request->intersect) { |
7db90f4a | 2164 | if (last_request->initiator != NL80211_REGDOM_SET_BY_DRIVER) { |
a042994d | 2165 | reset_regdomains(false); |
3e0c3ff3 LR |
2166 | cfg80211_regdomain = rd; |
2167 | return 0; | |
2168 | } | |
2169 | ||
fb1fc7ad LR |
2170 | /* |
2171 | * For a driver hint, lets copy the regulatory domain the | |
2172 | * driver wanted to the wiphy to deal with conflicts | |
2173 | */ | |
3e0c3ff3 | 2174 | |
558f6d32 LR |
2175 | /* |
2176 | * Userspace could have sent two replies with only | |
2177 | * one kernel request. | |
2178 | */ | |
2179 | if (request_wiphy->regd) | |
2180 | return -EALREADY; | |
3e0c3ff3 | 2181 | |
e9763c3c JB |
2182 | regd = reg_copy_regd(rd); |
2183 | if (IS_ERR(regd)) | |
2184 | return PTR_ERR(regd); | |
3e0c3ff3 | 2185 | |
e9763c3c | 2186 | request_wiphy->regd = regd; |
a042994d | 2187 | reset_regdomains(false); |
b8295acd LR |
2188 | cfg80211_regdomain = rd; |
2189 | return 0; | |
2190 | } | |
2191 | ||
2192 | /* Intersection requires a bit more work */ | |
2193 | ||
7db90f4a | 2194 | if (last_request->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE) { |
9c96477d LR |
2195 | intersected_rd = regdom_intersect(rd, cfg80211_regdomain); |
2196 | if (!intersected_rd) | |
2197 | return -EINVAL; | |
b8295acd | 2198 | |
fb1fc7ad LR |
2199 | /* |
2200 | * We can trash what CRDA provided now. | |
3e0c3ff3 | 2201 | * However if a driver requested this specific regulatory |
fb1fc7ad LR |
2202 | * domain we keep it for its private use |
2203 | */ | |
7db90f4a | 2204 | if (last_request->initiator == NL80211_REGDOM_SET_BY_DRIVER) |
806a9e39 | 2205 | request_wiphy->regd = rd; |
3e0c3ff3 LR |
2206 | else |
2207 | kfree(rd); | |
2208 | ||
b8295acd LR |
2209 | rd = NULL; |
2210 | ||
a042994d | 2211 | reset_regdomains(false); |
b8295acd LR |
2212 | cfg80211_regdomain = intersected_rd; |
2213 | ||
2214 | return 0; | |
9c96477d LR |
2215 | } |
2216 | ||
f3baed51 | 2217 | return -EINVAL; |
b2e1b302 LR |
2218 | } |
2219 | ||
2220 | ||
fb1fc7ad LR |
2221 | /* |
2222 | * Use this call to set the current regulatory domain. Conflicts with | |
b2e1b302 | 2223 | * multiple drivers can be ironed out later. Caller must've already |
fb1fc7ad LR |
2224 | * kmalloc'd the rd structure. Caller must hold cfg80211_mutex |
2225 | */ | |
a3d2eaf0 | 2226 | int set_regdom(const struct ieee80211_regdomain *rd) |
b2e1b302 | 2227 | { |
b2e1b302 LR |
2228 | int r; |
2229 | ||
761cf7ec LR |
2230 | assert_cfg80211_lock(); |
2231 | ||
abc7381b LR |
2232 | mutex_lock(®_mutex); |
2233 | ||
b2e1b302 LR |
2234 | /* Note that this doesn't update the wiphys, this is done below */ |
2235 | r = __set_regdom(rd); | |
d2372b31 | 2236 | if (r) { |
95908535 KV |
2237 | if (r == -EALREADY) |
2238 | reg_set_request_processed(); | |
2239 | ||
d2372b31 | 2240 | kfree(rd); |
abc7381b | 2241 | mutex_unlock(®_mutex); |
b2e1b302 | 2242 | return r; |
d2372b31 | 2243 | } |
b2e1b302 | 2244 | |
b2e1b302 | 2245 | /* This would make this whole thing pointless */ |
1a919318 | 2246 | BUG_ON(!last_request->intersect && rd != cfg80211_regdomain); |
b2e1b302 LR |
2247 | |
2248 | /* update all wiphys now with the new established regulatory domain */ | |
f6037d09 | 2249 | update_all_wiphy_regulatory(last_request->initiator); |
b2e1b302 | 2250 | |
a01ddafd | 2251 | print_regdomain(cfg80211_regdomain); |
b2e1b302 | 2252 | |
73d54c9e LR |
2253 | nl80211_send_reg_change_event(last_request); |
2254 | ||
b2e253cf LR |
2255 | reg_set_request_processed(); |
2256 | ||
abc7381b LR |
2257 | mutex_unlock(®_mutex); |
2258 | ||
b2e1b302 LR |
2259 | return r; |
2260 | } | |
2261 | ||
4d9d88d1 SJR |
2262 | #ifdef CONFIG_HOTPLUG |
2263 | int reg_device_uevent(struct device *dev, struct kobj_uevent_env *env) | |
2264 | { | |
2265 | if (last_request && !last_request->processed) { | |
2266 | if (add_uevent_var(env, "COUNTRY=%c%c", | |
2267 | last_request->alpha2[0], | |
2268 | last_request->alpha2[1])) | |
2269 | return -ENOMEM; | |
2270 | } | |
2271 | ||
2272 | return 0; | |
2273 | } | |
2274 | #else | |
2275 | int reg_device_uevent(struct device *dev, struct kobj_uevent_env *env) | |
2276 | { | |
2277 | return -ENODEV; | |
2278 | } | |
2279 | #endif /* CONFIG_HOTPLUG */ | |
2280 | ||
57b5ce07 LR |
2281 | void wiphy_regulatory_register(struct wiphy *wiphy) |
2282 | { | |
2283 | assert_cfg80211_lock(); | |
2284 | ||
2285 | mutex_lock(®_mutex); | |
2286 | ||
2287 | if (!reg_dev_ignore_cell_hint(wiphy)) | |
2288 | reg_num_devs_support_basehint++; | |
2289 | ||
14cdf112 | 2290 | wiphy_update_regulatory(wiphy, NL80211_REGDOM_SET_BY_CORE); |
f8a1c774 | 2291 | |
14cdf112 | 2292 | mutex_unlock(®_mutex); |
57b5ce07 LR |
2293 | } |
2294 | ||
a1794390 | 2295 | /* Caller must hold cfg80211_mutex */ |
bfead080 | 2296 | void wiphy_regulatory_deregister(struct wiphy *wiphy) |
3f2355cb | 2297 | { |
0ad8acaf | 2298 | struct wiphy *request_wiphy = NULL; |
806a9e39 | 2299 | |
761cf7ec LR |
2300 | assert_cfg80211_lock(); |
2301 | ||
abc7381b LR |
2302 | mutex_lock(®_mutex); |
2303 | ||
57b5ce07 LR |
2304 | if (!reg_dev_ignore_cell_hint(wiphy)) |
2305 | reg_num_devs_support_basehint--; | |
2306 | ||
0ef9ccdd CW |
2307 | kfree(wiphy->regd); |
2308 | ||
0ad8acaf LR |
2309 | if (last_request) |
2310 | request_wiphy = wiphy_idx_to_wiphy(last_request->wiphy_idx); | |
806a9e39 | 2311 | |
0ef9ccdd | 2312 | if (!request_wiphy || request_wiphy != wiphy) |
abc7381b | 2313 | goto out; |
0ef9ccdd | 2314 | |
806a9e39 | 2315 | last_request->wiphy_idx = WIPHY_IDX_STALE; |
3f2355cb | 2316 | last_request->country_ie_env = ENVIRON_ANY; |
abc7381b LR |
2317 | out: |
2318 | mutex_unlock(®_mutex); | |
3f2355cb LR |
2319 | } |
2320 | ||
a90c7a31 LR |
2321 | static void reg_timeout_work(struct work_struct *work) |
2322 | { | |
1a919318 | 2323 | REG_DBG_PRINT("Timeout while waiting for CRDA to reply, restoring regulatory settings\n"); |
a90c7a31 LR |
2324 | restore_regulatory_settings(true); |
2325 | } | |
2326 | ||
2fcc9f73 | 2327 | int __init regulatory_init(void) |
b2e1b302 | 2328 | { |
bcf4f99b | 2329 | int err = 0; |
734366de | 2330 | |
b2e1b302 LR |
2331 | reg_pdev = platform_device_register_simple("regulatory", 0, NULL, 0); |
2332 | if (IS_ERR(reg_pdev)) | |
2333 | return PTR_ERR(reg_pdev); | |
734366de | 2334 | |
4d9d88d1 SJR |
2335 | reg_pdev->dev.type = ®_device_type; |
2336 | ||
fe33eb39 | 2337 | spin_lock_init(®_requests_lock); |
e38f8a7a | 2338 | spin_lock_init(®_pending_beacons_lock); |
fe33eb39 | 2339 | |
80007efe LR |
2340 | reg_regdb_size_check(); |
2341 | ||
a3d2eaf0 | 2342 | cfg80211_regdomain = cfg80211_world_regdom; |
734366de | 2343 | |
09d989d1 LR |
2344 | user_alpha2[0] = '9'; |
2345 | user_alpha2[1] = '7'; | |
2346 | ||
ae9e4b0d LR |
2347 | /* We always try to get an update for the static regdomain */ |
2348 | err = regulatory_hint_core(cfg80211_regdomain->alpha2); | |
ba25c141 | 2349 | if (err) { |
bcf4f99b LR |
2350 | if (err == -ENOMEM) |
2351 | return err; | |
2352 | /* | |
2353 | * N.B. kobject_uevent_env() can fail mainly for when we're out | |
2354 | * memory which is handled and propagated appropriately above | |
2355 | * but it can also fail during a netlink_broadcast() or during | |
2356 | * early boot for call_usermodehelper(). For now treat these | |
2357 | * errors as non-fatal. | |
2358 | */ | |
e9c0268f | 2359 | pr_err("kobject_uevent_env() was unable to call CRDA during init\n"); |
bcf4f99b LR |
2360 | #ifdef CONFIG_CFG80211_REG_DEBUG |
2361 | /* We want to find out exactly why when debugging */ | |
2362 | WARN_ON(err); | |
734366de | 2363 | #endif |
bcf4f99b | 2364 | } |
734366de | 2365 | |
ae9e4b0d LR |
2366 | /* |
2367 | * Finally, if the user set the module parameter treat it | |
2368 | * as a user hint. | |
2369 | */ | |
2370 | if (!is_world_regdom(ieee80211_regdom)) | |
57b5ce07 LR |
2371 | regulatory_hint_user(ieee80211_regdom, |
2372 | NL80211_USER_REG_HINT_USER); | |
ae9e4b0d | 2373 | |
b2e1b302 LR |
2374 | return 0; |
2375 | } | |
2376 | ||
1a919318 | 2377 | void regulatory_exit(void) |
b2e1b302 | 2378 | { |
fe33eb39 | 2379 | struct regulatory_request *reg_request, *tmp; |
e38f8a7a | 2380 | struct reg_beacon *reg_beacon, *btmp; |
fe33eb39 LR |
2381 | |
2382 | cancel_work_sync(®_work); | |
a90c7a31 | 2383 | cancel_delayed_work_sync(®_timeout); |
fe33eb39 | 2384 | |
a1794390 | 2385 | mutex_lock(&cfg80211_mutex); |
abc7381b | 2386 | mutex_lock(®_mutex); |
734366de | 2387 | |
a042994d | 2388 | reset_regdomains(true); |
734366de | 2389 | |
58ebacc6 | 2390 | dev_set_uevent_suppress(®_pdev->dev, true); |
f6037d09 | 2391 | |
b2e1b302 | 2392 | platform_device_unregister(reg_pdev); |
734366de | 2393 | |
e38f8a7a | 2394 | spin_lock_bh(®_pending_beacons_lock); |
fea9bced JB |
2395 | list_for_each_entry_safe(reg_beacon, btmp, ®_pending_beacons, list) { |
2396 | list_del(®_beacon->list); | |
2397 | kfree(reg_beacon); | |
e38f8a7a LR |
2398 | } |
2399 | spin_unlock_bh(®_pending_beacons_lock); | |
2400 | ||
fea9bced JB |
2401 | list_for_each_entry_safe(reg_beacon, btmp, ®_beacon_list, list) { |
2402 | list_del(®_beacon->list); | |
2403 | kfree(reg_beacon); | |
e38f8a7a LR |
2404 | } |
2405 | ||
fe33eb39 | 2406 | spin_lock(®_requests_lock); |
fea9bced JB |
2407 | list_for_each_entry_safe(reg_request, tmp, ®_requests_list, list) { |
2408 | list_del(®_request->list); | |
2409 | kfree(reg_request); | |
fe33eb39 LR |
2410 | } |
2411 | spin_unlock(®_requests_lock); | |
2412 | ||
abc7381b | 2413 | mutex_unlock(®_mutex); |
a1794390 | 2414 | mutex_unlock(&cfg80211_mutex); |
8318d78a | 2415 | } |