Commit | Line | Data |
---|---|---|
8318d78a JB |
1 | /* |
2 | * Copyright 2002-2005, Instant802 Networks, Inc. | |
3 | * Copyright 2005-2006, Devicescape Software, Inc. | |
4 | * Copyright 2007 Johannes Berg <johannes@sipsolutions.net> | |
3b77d5ec | 5 | * Copyright 2008-2011 Luis R. Rodriguez <mcgrof@qca.qualcomm.com> |
8318d78a | 6 | * |
3b77d5ec LR |
7 | * Permission to use, copy, modify, and/or distribute this software for any |
8 | * purpose with or without fee is hereby granted, provided that the above | |
9 | * copyright notice and this permission notice appear in all copies. | |
10 | * | |
11 | * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES | |
12 | * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF | |
13 | * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR | |
14 | * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES | |
15 | * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN | |
16 | * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF | |
17 | * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. | |
8318d78a JB |
18 | */ |
19 | ||
3b77d5ec | 20 | |
b2e1b302 LR |
21 | /** |
22 | * DOC: Wireless regulatory infrastructure | |
8318d78a JB |
23 | * |
24 | * The usual implementation is for a driver to read a device EEPROM to | |
25 | * determine which regulatory domain it should be operating under, then | |
26 | * looking up the allowable channels in a driver-local table and finally | |
27 | * registering those channels in the wiphy structure. | |
28 | * | |
b2e1b302 LR |
29 | * Another set of compliance enforcement is for drivers to use their |
30 | * own compliance limits which can be stored on the EEPROM. The host | |
31 | * driver or firmware may ensure these are used. | |
32 | * | |
33 | * In addition to all this we provide an extra layer of regulatory | |
34 | * conformance. For drivers which do not have any regulatory | |
35 | * information CRDA provides the complete regulatory solution. | |
36 | * For others it provides a community effort on further restrictions | |
37 | * to enhance compliance. | |
38 | * | |
39 | * Note: When number of rules --> infinity we will not be able to | |
40 | * index on alpha2 any more, instead we'll probably have to | |
41 | * rely on some SHA1 checksum of the regdomain for example. | |
42 | * | |
8318d78a | 43 | */ |
e9c0268f JP |
44 | |
45 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt | |
46 | ||
8318d78a | 47 | #include <linux/kernel.h> |
bc3b2d7f | 48 | #include <linux/export.h> |
5a0e3ad6 | 49 | #include <linux/slab.h> |
b2e1b302 | 50 | #include <linux/list.h> |
c61029c7 | 51 | #include <linux/ctype.h> |
b2e1b302 LR |
52 | #include <linux/nl80211.h> |
53 | #include <linux/platform_device.h> | |
d9b93842 | 54 | #include <linux/moduleparam.h> |
b2e1b302 | 55 | #include <net/cfg80211.h> |
8318d78a | 56 | #include "core.h" |
b2e1b302 | 57 | #include "reg.h" |
3b377ea9 | 58 | #include "regdb.h" |
73d54c9e | 59 | #include "nl80211.h" |
8318d78a | 60 | |
4113f751 | 61 | #ifdef CONFIG_CFG80211_REG_DEBUG |
12c5ffb5 JP |
62 | #define REG_DBG_PRINT(format, args...) \ |
63 | printk(KERN_DEBUG pr_fmt(format), ##args) | |
4113f751 | 64 | #else |
8271195e | 65 | #define REG_DBG_PRINT(args...) |
4113f751 LR |
66 | #endif |
67 | ||
2f92212b JB |
68 | enum reg_request_treatment { |
69 | REG_REQ_OK, | |
70 | REG_REQ_IGNORE, | |
71 | REG_REQ_INTERSECT, | |
72 | REG_REQ_ALREADY_SET, | |
73 | }; | |
74 | ||
a042994d LR |
75 | static struct regulatory_request core_request_world = { |
76 | .initiator = NL80211_REGDOM_SET_BY_CORE, | |
77 | .alpha2[0] = '0', | |
78 | .alpha2[1] = '0', | |
79 | .intersect = false, | |
80 | .processed = true, | |
81 | .country_ie_env = ENVIRON_ANY, | |
82 | }; | |
83 | ||
5166ccd2 | 84 | /* Receipt of information from last regulatory request */ |
c492db37 JB |
85 | static struct regulatory_request __rcu *last_request = |
86 | (void __rcu *)&core_request_world; | |
734366de | 87 | |
b2e1b302 LR |
88 | /* To trigger userspace events */ |
89 | static struct platform_device *reg_pdev; | |
8318d78a | 90 | |
4d9d88d1 SJR |
91 | static struct device_type reg_device_type = { |
92 | .uevent = reg_device_uevent, | |
93 | }; | |
94 | ||
fb1fc7ad LR |
95 | /* |
96 | * Central wireless core regulatory domains, we only need two, | |
734366de | 97 | * the current one and a world regulatory domain in case we have no |
e8da2bb4 | 98 | * information to give us an alpha2. |
fb1fc7ad | 99 | */ |
458f4f9e | 100 | const struct ieee80211_regdomain __rcu *cfg80211_regdomain; |
734366de | 101 | |
abc7381b LR |
102 | /* |
103 | * Protects static reg.c components: | |
458f4f9e JB |
104 | * - cfg80211_regdomain (if not used with RCU) |
105 | * - cfg80211_world_regdom | |
c492db37 | 106 | * - last_request (if not used with RCU) |
458f4f9e | 107 | * - reg_num_devs_support_basehint |
abc7381b | 108 | */ |
670b7f11 | 109 | static DEFINE_MUTEX(reg_mutex); |
46a5ebaf | 110 | |
57b5ce07 LR |
111 | /* |
112 | * Number of devices that registered to the core | |
113 | * that support cellular base station regulatory hints | |
114 | */ | |
115 | static int reg_num_devs_support_basehint; | |
116 | ||
46a5ebaf JB |
117 | static inline void assert_reg_lock(void) |
118 | { | |
119 | lockdep_assert_held(®_mutex); | |
120 | } | |
abc7381b | 121 | |
458f4f9e JB |
122 | static const struct ieee80211_regdomain *get_cfg80211_regdom(void) |
123 | { | |
124 | return rcu_dereference_protected(cfg80211_regdomain, | |
125 | lockdep_is_held(®_mutex)); | |
126 | } | |
127 | ||
128 | static const struct ieee80211_regdomain *get_wiphy_regdom(struct wiphy *wiphy) | |
129 | { | |
130 | return rcu_dereference_protected(wiphy->regd, | |
131 | lockdep_is_held(®_mutex)); | |
132 | } | |
133 | ||
134 | static void rcu_free_regdom(const struct ieee80211_regdomain *r) | |
135 | { | |
136 | if (!r) | |
137 | return; | |
138 | kfree_rcu((struct ieee80211_regdomain *)r, rcu_head); | |
139 | } | |
140 | ||
c492db37 JB |
141 | static struct regulatory_request *get_last_request(void) |
142 | { | |
4a484cff JB |
143 | return rcu_dereference_check(last_request, |
144 | lockdep_is_held(®_mutex)); | |
c492db37 JB |
145 | } |
146 | ||
e38f8a7a | 147 | /* Used to queue up regulatory hints */ |
fe33eb39 LR |
148 | static LIST_HEAD(reg_requests_list); |
149 | static spinlock_t reg_requests_lock; | |
150 | ||
e38f8a7a LR |
151 | /* Used to queue up beacon hints for review */ |
152 | static LIST_HEAD(reg_pending_beacons); | |
153 | static spinlock_t reg_pending_beacons_lock; | |
154 | ||
155 | /* Used to keep track of processed beacon hints */ | |
156 | static LIST_HEAD(reg_beacon_list); | |
157 | ||
158 | struct reg_beacon { | |
159 | struct list_head list; | |
160 | struct ieee80211_channel chan; | |
161 | }; | |
162 | ||
f333a7a2 LR |
163 | static void reg_todo(struct work_struct *work); |
164 | static DECLARE_WORK(reg_work, reg_todo); | |
165 | ||
a90c7a31 LR |
166 | static void reg_timeout_work(struct work_struct *work); |
167 | static DECLARE_DELAYED_WORK(reg_timeout, reg_timeout_work); | |
168 | ||
734366de JB |
169 | /* We keep a static world regulatory domain in case of the absence of CRDA */ |
170 | static const struct ieee80211_regdomain world_regdom = { | |
90cdc6df | 171 | .n_reg_rules = 6, |
734366de JB |
172 | .alpha2 = "00", |
173 | .reg_rules = { | |
68798a62 LR |
174 | /* IEEE 802.11b/g, channels 1..11 */ |
175 | REG_RULE(2412-10, 2462+10, 40, 6, 20, 0), | |
43c771a1 JB |
176 | /* IEEE 802.11b/g, channels 12..13. */ |
177 | REG_RULE(2467-10, 2472+10, 40, 6, 20, | |
3fc71f77 LR |
178 | NL80211_RRF_PASSIVE_SCAN | |
179 | NL80211_RRF_NO_IBSS), | |
611b6a82 LR |
180 | /* IEEE 802.11 channel 14 - Only JP enables |
181 | * this and for 802.11b only */ | |
182 | REG_RULE(2484-10, 2484+10, 20, 6, 20, | |
183 | NL80211_RRF_PASSIVE_SCAN | | |
184 | NL80211_RRF_NO_IBSS | | |
185 | NL80211_RRF_NO_OFDM), | |
186 | /* IEEE 802.11a, channel 36..48 */ | |
ec329ace | 187 | REG_RULE(5180-10, 5240+10, 40, 6, 20, |
611b6a82 LR |
188 | NL80211_RRF_PASSIVE_SCAN | |
189 | NL80211_RRF_NO_IBSS), | |
3fc71f77 LR |
190 | |
191 | /* NB: 5260 MHz - 5700 MHz requies DFS */ | |
192 | ||
193 | /* IEEE 802.11a, channel 149..165 */ | |
ec329ace | 194 | REG_RULE(5745-10, 5825+10, 40, 6, 20, |
3fc71f77 LR |
195 | NL80211_RRF_PASSIVE_SCAN | |
196 | NL80211_RRF_NO_IBSS), | |
90cdc6df VK |
197 | |
198 | /* IEEE 802.11ad (60gHz), channels 1..3 */ | |
199 | REG_RULE(56160+2160*1-1080, 56160+2160*3+1080, 2160, 0, 0, 0), | |
734366de JB |
200 | } |
201 | }; | |
202 | ||
a3d2eaf0 JB |
203 | static const struct ieee80211_regdomain *cfg80211_world_regdom = |
204 | &world_regdom; | |
734366de | 205 | |
6ee7d330 | 206 | static char *ieee80211_regdom = "00"; |
09d989d1 | 207 | static char user_alpha2[2]; |
6ee7d330 | 208 | |
734366de JB |
209 | module_param(ieee80211_regdom, charp, 0444); |
210 | MODULE_PARM_DESC(ieee80211_regdom, "IEEE 802.11 regulatory domain code"); | |
211 | ||
379b82f4 JB |
212 | static void reset_regdomains(bool full_reset, |
213 | const struct ieee80211_regdomain *new_regdom) | |
734366de | 214 | { |
458f4f9e | 215 | const struct ieee80211_regdomain *r; |
c492db37 | 216 | struct regulatory_request *lr; |
458f4f9e | 217 | |
e8da2bb4 JB |
218 | assert_reg_lock(); |
219 | ||
458f4f9e JB |
220 | r = get_cfg80211_regdom(); |
221 | ||
942b25cf | 222 | /* avoid freeing static information or freeing something twice */ |
458f4f9e JB |
223 | if (r == cfg80211_world_regdom) |
224 | r = NULL; | |
942b25cf JB |
225 | if (cfg80211_world_regdom == &world_regdom) |
226 | cfg80211_world_regdom = NULL; | |
458f4f9e JB |
227 | if (r == &world_regdom) |
228 | r = NULL; | |
942b25cf | 229 | |
458f4f9e JB |
230 | rcu_free_regdom(r); |
231 | rcu_free_regdom(cfg80211_world_regdom); | |
734366de | 232 | |
a3d2eaf0 | 233 | cfg80211_world_regdom = &world_regdom; |
458f4f9e | 234 | rcu_assign_pointer(cfg80211_regdomain, new_regdom); |
a042994d LR |
235 | |
236 | if (!full_reset) | |
237 | return; | |
238 | ||
c492db37 JB |
239 | lr = get_last_request(); |
240 | if (lr != &core_request_world && lr) | |
241 | kfree_rcu(lr, rcu_head); | |
242 | rcu_assign_pointer(last_request, &core_request_world); | |
734366de JB |
243 | } |
244 | ||
fb1fc7ad LR |
245 | /* |
246 | * Dynamic world regulatory domain requested by the wireless | |
247 | * core upon initialization | |
248 | */ | |
a3d2eaf0 | 249 | static void update_world_regdomain(const struct ieee80211_regdomain *rd) |
734366de | 250 | { |
c492db37 | 251 | struct regulatory_request *lr; |
734366de | 252 | |
c492db37 JB |
253 | lr = get_last_request(); |
254 | ||
255 | WARN_ON(!lr); | |
734366de | 256 | |
379b82f4 | 257 | reset_regdomains(false, rd); |
734366de JB |
258 | |
259 | cfg80211_world_regdom = rd; | |
734366de | 260 | } |
734366de | 261 | |
a3d2eaf0 | 262 | bool is_world_regdom(const char *alpha2) |
b2e1b302 LR |
263 | { |
264 | if (!alpha2) | |
265 | return false; | |
1a919318 | 266 | return alpha2[0] == '0' && alpha2[1] == '0'; |
b2e1b302 | 267 | } |
8318d78a | 268 | |
a3d2eaf0 | 269 | static bool is_alpha2_set(const char *alpha2) |
b2e1b302 LR |
270 | { |
271 | if (!alpha2) | |
272 | return false; | |
1a919318 | 273 | return alpha2[0] && alpha2[1]; |
b2e1b302 | 274 | } |
8318d78a | 275 | |
a3d2eaf0 | 276 | static bool is_unknown_alpha2(const char *alpha2) |
b2e1b302 LR |
277 | { |
278 | if (!alpha2) | |
279 | return false; | |
fb1fc7ad LR |
280 | /* |
281 | * Special case where regulatory domain was built by driver | |
282 | * but a specific alpha2 cannot be determined | |
283 | */ | |
1a919318 | 284 | return alpha2[0] == '9' && alpha2[1] == '9'; |
b2e1b302 | 285 | } |
8318d78a | 286 | |
3f2355cb LR |
287 | static bool is_intersected_alpha2(const char *alpha2) |
288 | { | |
289 | if (!alpha2) | |
290 | return false; | |
fb1fc7ad LR |
291 | /* |
292 | * Special case where regulatory domain is the | |
3f2355cb | 293 | * result of an intersection between two regulatory domain |
fb1fc7ad LR |
294 | * structures |
295 | */ | |
1a919318 | 296 | return alpha2[0] == '9' && alpha2[1] == '8'; |
3f2355cb LR |
297 | } |
298 | ||
a3d2eaf0 | 299 | static bool is_an_alpha2(const char *alpha2) |
b2e1b302 LR |
300 | { |
301 | if (!alpha2) | |
302 | return false; | |
1a919318 | 303 | return isalpha(alpha2[0]) && isalpha(alpha2[1]); |
b2e1b302 | 304 | } |
8318d78a | 305 | |
a3d2eaf0 | 306 | static bool alpha2_equal(const char *alpha2_x, const char *alpha2_y) |
b2e1b302 LR |
307 | { |
308 | if (!alpha2_x || !alpha2_y) | |
309 | return false; | |
1a919318 | 310 | return alpha2_x[0] == alpha2_y[0] && alpha2_x[1] == alpha2_y[1]; |
b2e1b302 LR |
311 | } |
312 | ||
69b1572b | 313 | static bool regdom_changes(const char *alpha2) |
b2e1b302 | 314 | { |
458f4f9e | 315 | const struct ieee80211_regdomain *r = get_cfg80211_regdom(); |
761cf7ec | 316 | |
458f4f9e | 317 | if (!r) |
b2e1b302 | 318 | return true; |
458f4f9e | 319 | return !alpha2_equal(r->alpha2, alpha2); |
b2e1b302 LR |
320 | } |
321 | ||
09d989d1 LR |
322 | /* |
323 | * The NL80211_REGDOM_SET_BY_USER regdom alpha2 is cached, this lets | |
324 | * you know if a valid regulatory hint with NL80211_REGDOM_SET_BY_USER | |
325 | * has ever been issued. | |
326 | */ | |
327 | static bool is_user_regdom_saved(void) | |
328 | { | |
329 | if (user_alpha2[0] == '9' && user_alpha2[1] == '7') | |
330 | return false; | |
331 | ||
332 | /* This would indicate a mistake on the design */ | |
1a919318 | 333 | if (WARN(!is_world_regdom(user_alpha2) && !is_an_alpha2(user_alpha2), |
09d989d1 | 334 | "Unexpected user alpha2: %c%c\n", |
1a919318 | 335 | user_alpha2[0], user_alpha2[1])) |
09d989d1 LR |
336 | return false; |
337 | ||
338 | return true; | |
339 | } | |
340 | ||
e9763c3c JB |
341 | static const struct ieee80211_regdomain * |
342 | reg_copy_regd(const struct ieee80211_regdomain *src_regd) | |
3b377ea9 JL |
343 | { |
344 | struct ieee80211_regdomain *regd; | |
e9763c3c | 345 | int size_of_regd; |
3b377ea9 JL |
346 | unsigned int i; |
347 | ||
82f20856 JB |
348 | size_of_regd = |
349 | sizeof(struct ieee80211_regdomain) + | |
350 | src_regd->n_reg_rules * sizeof(struct ieee80211_reg_rule); | |
3b377ea9 JL |
351 | |
352 | regd = kzalloc(size_of_regd, GFP_KERNEL); | |
353 | if (!regd) | |
e9763c3c | 354 | return ERR_PTR(-ENOMEM); |
3b377ea9 JL |
355 | |
356 | memcpy(regd, src_regd, sizeof(struct ieee80211_regdomain)); | |
357 | ||
358 | for (i = 0; i < src_regd->n_reg_rules; i++) | |
359 | memcpy(®d->reg_rules[i], &src_regd->reg_rules[i], | |
e9763c3c | 360 | sizeof(struct ieee80211_reg_rule)); |
3b377ea9 | 361 | |
e9763c3c | 362 | return regd; |
3b377ea9 JL |
363 | } |
364 | ||
365 | #ifdef CONFIG_CFG80211_INTERNAL_REGDB | |
366 | struct reg_regdb_search_request { | |
367 | char alpha2[2]; | |
368 | struct list_head list; | |
369 | }; | |
370 | ||
371 | static LIST_HEAD(reg_regdb_search_list); | |
368d06f5 | 372 | static DEFINE_MUTEX(reg_regdb_search_mutex); |
3b377ea9 JL |
373 | |
374 | static void reg_regdb_search(struct work_struct *work) | |
375 | { | |
376 | struct reg_regdb_search_request *request; | |
e9763c3c JB |
377 | const struct ieee80211_regdomain *curdom, *regdom = NULL; |
378 | int i; | |
a85d0d7f LR |
379 | |
380 | mutex_lock(&cfg80211_mutex); | |
3b377ea9 | 381 | |
368d06f5 | 382 | mutex_lock(®_regdb_search_mutex); |
3b377ea9 JL |
383 | while (!list_empty(®_regdb_search_list)) { |
384 | request = list_first_entry(®_regdb_search_list, | |
385 | struct reg_regdb_search_request, | |
386 | list); | |
387 | list_del(&request->list); | |
388 | ||
1a919318 | 389 | for (i = 0; i < reg_regdb_size; i++) { |
3b377ea9 JL |
390 | curdom = reg_regdb[i]; |
391 | ||
1a919318 | 392 | if (alpha2_equal(request->alpha2, curdom->alpha2)) { |
e9763c3c | 393 | regdom = reg_copy_regd(curdom); |
3b377ea9 JL |
394 | break; |
395 | } | |
396 | } | |
397 | ||
398 | kfree(request); | |
399 | } | |
368d06f5 | 400 | mutex_unlock(®_regdb_search_mutex); |
a85d0d7f | 401 | |
e9763c3c | 402 | if (!IS_ERR_OR_NULL(regdom)) |
a85d0d7f LR |
403 | set_regdom(regdom); |
404 | ||
405 | mutex_unlock(&cfg80211_mutex); | |
3b377ea9 JL |
406 | } |
407 | ||
408 | static DECLARE_WORK(reg_regdb_work, reg_regdb_search); | |
409 | ||
410 | static void reg_regdb_query(const char *alpha2) | |
411 | { | |
412 | struct reg_regdb_search_request *request; | |
413 | ||
414 | if (!alpha2) | |
415 | return; | |
416 | ||
417 | request = kzalloc(sizeof(struct reg_regdb_search_request), GFP_KERNEL); | |
418 | if (!request) | |
419 | return; | |
420 | ||
421 | memcpy(request->alpha2, alpha2, 2); | |
422 | ||
368d06f5 | 423 | mutex_lock(®_regdb_search_mutex); |
3b377ea9 | 424 | list_add_tail(&request->list, ®_regdb_search_list); |
368d06f5 | 425 | mutex_unlock(®_regdb_search_mutex); |
3b377ea9 JL |
426 | |
427 | schedule_work(®_regdb_work); | |
428 | } | |
80007efe LR |
429 | |
430 | /* Feel free to add any other sanity checks here */ | |
431 | static void reg_regdb_size_check(void) | |
432 | { | |
433 | /* We should ideally BUILD_BUG_ON() but then random builds would fail */ | |
434 | WARN_ONCE(!reg_regdb_size, "db.txt is empty, you should update it..."); | |
435 | } | |
3b377ea9 | 436 | #else |
80007efe | 437 | static inline void reg_regdb_size_check(void) {} |
3b377ea9 JL |
438 | static inline void reg_regdb_query(const char *alpha2) {} |
439 | #endif /* CONFIG_CFG80211_INTERNAL_REGDB */ | |
440 | ||
fb1fc7ad LR |
441 | /* |
442 | * This lets us keep regulatory code which is updated on a regulatory | |
4d9d88d1 SJR |
443 | * basis in userspace. Country information is filled in by |
444 | * reg_device_uevent | |
fb1fc7ad | 445 | */ |
b2e1b302 LR |
446 | static int call_crda(const char *alpha2) |
447 | { | |
b2e1b302 | 448 | if (!is_world_regdom((char *) alpha2)) |
e9c0268f | 449 | pr_info("Calling CRDA for country: %c%c\n", |
b2e1b302 LR |
450 | alpha2[0], alpha2[1]); |
451 | else | |
e9c0268f | 452 | pr_info("Calling CRDA to update world regulatory domain\n"); |
b2e1b302 | 453 | |
3b377ea9 JL |
454 | /* query internal regulatory database (if it exists) */ |
455 | reg_regdb_query(alpha2); | |
456 | ||
4d9d88d1 | 457 | return kobject_uevent(®_pdev->dev.kobj, KOBJ_CHANGE); |
b2e1b302 LR |
458 | } |
459 | ||
6913b49a | 460 | static bool reg_is_valid_request(const char *alpha2) |
b2e1b302 | 461 | { |
c492db37 | 462 | struct regulatory_request *lr = get_last_request(); |
61405e97 | 463 | |
c492db37 | 464 | if (!lr || lr->processed) |
f6037d09 JB |
465 | return false; |
466 | ||
c492db37 | 467 | return alpha2_equal(lr->alpha2, alpha2); |
b2e1b302 | 468 | } |
8318d78a | 469 | |
b2e1b302 | 470 | /* Sanity check on a regulatory rule */ |
a3d2eaf0 | 471 | static bool is_valid_reg_rule(const struct ieee80211_reg_rule *rule) |
8318d78a | 472 | { |
a3d2eaf0 | 473 | const struct ieee80211_freq_range *freq_range = &rule->freq_range; |
b2e1b302 LR |
474 | u32 freq_diff; |
475 | ||
91e99004 | 476 | if (freq_range->start_freq_khz <= 0 || freq_range->end_freq_khz <= 0) |
b2e1b302 LR |
477 | return false; |
478 | ||
479 | if (freq_range->start_freq_khz > freq_range->end_freq_khz) | |
480 | return false; | |
481 | ||
482 | freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz; | |
483 | ||
bd05f28e | 484 | if (freq_range->end_freq_khz <= freq_range->start_freq_khz || |
1a919318 | 485 | freq_range->max_bandwidth_khz > freq_diff) |
b2e1b302 LR |
486 | return false; |
487 | ||
488 | return true; | |
489 | } | |
490 | ||
a3d2eaf0 | 491 | static bool is_valid_rd(const struct ieee80211_regdomain *rd) |
b2e1b302 | 492 | { |
a3d2eaf0 | 493 | const struct ieee80211_reg_rule *reg_rule = NULL; |
b2e1b302 | 494 | unsigned int i; |
8318d78a | 495 | |
b2e1b302 LR |
496 | if (!rd->n_reg_rules) |
497 | return false; | |
8318d78a | 498 | |
88dc1c3f LR |
499 | if (WARN_ON(rd->n_reg_rules > NL80211_MAX_SUPP_REG_RULES)) |
500 | return false; | |
501 | ||
b2e1b302 LR |
502 | for (i = 0; i < rd->n_reg_rules; i++) { |
503 | reg_rule = &rd->reg_rules[i]; | |
504 | if (!is_valid_reg_rule(reg_rule)) | |
505 | return false; | |
506 | } | |
507 | ||
508 | return true; | |
8318d78a JB |
509 | } |
510 | ||
038659e7 | 511 | static bool reg_does_bw_fit(const struct ieee80211_freq_range *freq_range, |
fe7ef5e9 | 512 | u32 center_freq_khz, u32 bw_khz) |
b2e1b302 | 513 | { |
038659e7 LR |
514 | u32 start_freq_khz, end_freq_khz; |
515 | ||
516 | start_freq_khz = center_freq_khz - (bw_khz/2); | |
517 | end_freq_khz = center_freq_khz + (bw_khz/2); | |
518 | ||
519 | if (start_freq_khz >= freq_range->start_freq_khz && | |
520 | end_freq_khz <= freq_range->end_freq_khz) | |
521 | return true; | |
522 | ||
523 | return false; | |
b2e1b302 | 524 | } |
8318d78a | 525 | |
0c7dc45d LR |
526 | /** |
527 | * freq_in_rule_band - tells us if a frequency is in a frequency band | |
528 | * @freq_range: frequency rule we want to query | |
529 | * @freq_khz: frequency we are inquiring about | |
530 | * | |
531 | * This lets us know if a specific frequency rule is or is not relevant to | |
532 | * a specific frequency's band. Bands are device specific and artificial | |
64629b9d VK |
533 | * definitions (the "2.4 GHz band", the "5 GHz band" and the "60GHz band"), |
534 | * however it is safe for now to assume that a frequency rule should not be | |
535 | * part of a frequency's band if the start freq or end freq are off by more | |
536 | * than 2 GHz for the 2.4 and 5 GHz bands, and by more than 10 GHz for the | |
537 | * 60 GHz band. | |
0c7dc45d LR |
538 | * This resolution can be lowered and should be considered as we add |
539 | * regulatory rule support for other "bands". | |
540 | **/ | |
541 | static bool freq_in_rule_band(const struct ieee80211_freq_range *freq_range, | |
1a919318 | 542 | u32 freq_khz) |
0c7dc45d LR |
543 | { |
544 | #define ONE_GHZ_IN_KHZ 1000000 | |
64629b9d VK |
545 | /* |
546 | * From 802.11ad: directional multi-gigabit (DMG): | |
547 | * Pertaining to operation in a frequency band containing a channel | |
548 | * with the Channel starting frequency above 45 GHz. | |
549 | */ | |
550 | u32 limit = freq_khz > 45 * ONE_GHZ_IN_KHZ ? | |
551 | 10 * ONE_GHZ_IN_KHZ : 2 * ONE_GHZ_IN_KHZ; | |
552 | if (abs(freq_khz - freq_range->start_freq_khz) <= limit) | |
0c7dc45d | 553 | return true; |
64629b9d | 554 | if (abs(freq_khz - freq_range->end_freq_khz) <= limit) |
0c7dc45d LR |
555 | return true; |
556 | return false; | |
557 | #undef ONE_GHZ_IN_KHZ | |
558 | } | |
559 | ||
fb1fc7ad LR |
560 | /* |
561 | * Helper for regdom_intersect(), this does the real | |
562 | * mathematical intersection fun | |
563 | */ | |
1a919318 JB |
564 | static int reg_rules_intersect(const struct ieee80211_reg_rule *rule1, |
565 | const struct ieee80211_reg_rule *rule2, | |
566 | struct ieee80211_reg_rule *intersected_rule) | |
9c96477d LR |
567 | { |
568 | const struct ieee80211_freq_range *freq_range1, *freq_range2; | |
569 | struct ieee80211_freq_range *freq_range; | |
570 | const struct ieee80211_power_rule *power_rule1, *power_rule2; | |
571 | struct ieee80211_power_rule *power_rule; | |
572 | u32 freq_diff; | |
573 | ||
574 | freq_range1 = &rule1->freq_range; | |
575 | freq_range2 = &rule2->freq_range; | |
576 | freq_range = &intersected_rule->freq_range; | |
577 | ||
578 | power_rule1 = &rule1->power_rule; | |
579 | power_rule2 = &rule2->power_rule; | |
580 | power_rule = &intersected_rule->power_rule; | |
581 | ||
582 | freq_range->start_freq_khz = max(freq_range1->start_freq_khz, | |
1a919318 | 583 | freq_range2->start_freq_khz); |
9c96477d | 584 | freq_range->end_freq_khz = min(freq_range1->end_freq_khz, |
1a919318 | 585 | freq_range2->end_freq_khz); |
9c96477d | 586 | freq_range->max_bandwidth_khz = min(freq_range1->max_bandwidth_khz, |
1a919318 | 587 | freq_range2->max_bandwidth_khz); |
9c96477d LR |
588 | |
589 | freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz; | |
590 | if (freq_range->max_bandwidth_khz > freq_diff) | |
591 | freq_range->max_bandwidth_khz = freq_diff; | |
592 | ||
593 | power_rule->max_eirp = min(power_rule1->max_eirp, | |
594 | power_rule2->max_eirp); | |
595 | power_rule->max_antenna_gain = min(power_rule1->max_antenna_gain, | |
596 | power_rule2->max_antenna_gain); | |
597 | ||
1a919318 | 598 | intersected_rule->flags = rule1->flags | rule2->flags; |
9c96477d LR |
599 | |
600 | if (!is_valid_reg_rule(intersected_rule)) | |
601 | return -EINVAL; | |
602 | ||
603 | return 0; | |
604 | } | |
605 | ||
606 | /** | |
607 | * regdom_intersect - do the intersection between two regulatory domains | |
608 | * @rd1: first regulatory domain | |
609 | * @rd2: second regulatory domain | |
610 | * | |
611 | * Use this function to get the intersection between two regulatory domains. | |
612 | * Once completed we will mark the alpha2 for the rd as intersected, "98", | |
613 | * as no one single alpha2 can represent this regulatory domain. | |
614 | * | |
615 | * Returns a pointer to the regulatory domain structure which will hold the | |
616 | * resulting intersection of rules between rd1 and rd2. We will | |
617 | * kzalloc() this structure for you. | |
618 | */ | |
1a919318 JB |
619 | static struct ieee80211_regdomain * |
620 | regdom_intersect(const struct ieee80211_regdomain *rd1, | |
621 | const struct ieee80211_regdomain *rd2) | |
9c96477d LR |
622 | { |
623 | int r, size_of_regd; | |
624 | unsigned int x, y; | |
625 | unsigned int num_rules = 0, rule_idx = 0; | |
626 | const struct ieee80211_reg_rule *rule1, *rule2; | |
627 | struct ieee80211_reg_rule *intersected_rule; | |
628 | struct ieee80211_regdomain *rd; | |
629 | /* This is just a dummy holder to help us count */ | |
74f53cd8 | 630 | struct ieee80211_reg_rule dummy_rule; |
9c96477d LR |
631 | |
632 | if (!rd1 || !rd2) | |
633 | return NULL; | |
634 | ||
fb1fc7ad LR |
635 | /* |
636 | * First we get a count of the rules we'll need, then we actually | |
9c96477d LR |
637 | * build them. This is to so we can malloc() and free() a |
638 | * regdomain once. The reason we use reg_rules_intersect() here | |
639 | * is it will return -EINVAL if the rule computed makes no sense. | |
fb1fc7ad LR |
640 | * All rules that do check out OK are valid. |
641 | */ | |
9c96477d LR |
642 | |
643 | for (x = 0; x < rd1->n_reg_rules; x++) { | |
644 | rule1 = &rd1->reg_rules[x]; | |
645 | for (y = 0; y < rd2->n_reg_rules; y++) { | |
646 | rule2 = &rd2->reg_rules[y]; | |
74f53cd8 | 647 | if (!reg_rules_intersect(rule1, rule2, &dummy_rule)) |
9c96477d | 648 | num_rules++; |
9c96477d LR |
649 | } |
650 | } | |
651 | ||
652 | if (!num_rules) | |
653 | return NULL; | |
654 | ||
655 | size_of_regd = sizeof(struct ieee80211_regdomain) + | |
82f20856 | 656 | num_rules * sizeof(struct ieee80211_reg_rule); |
9c96477d LR |
657 | |
658 | rd = kzalloc(size_of_regd, GFP_KERNEL); | |
659 | if (!rd) | |
660 | return NULL; | |
661 | ||
8a57fff0 | 662 | for (x = 0; x < rd1->n_reg_rules && rule_idx < num_rules; x++) { |
9c96477d | 663 | rule1 = &rd1->reg_rules[x]; |
8a57fff0 | 664 | for (y = 0; y < rd2->n_reg_rules && rule_idx < num_rules; y++) { |
9c96477d | 665 | rule2 = &rd2->reg_rules[y]; |
fb1fc7ad LR |
666 | /* |
667 | * This time around instead of using the stack lets | |
9c96477d | 668 | * write to the target rule directly saving ourselves |
fb1fc7ad LR |
669 | * a memcpy() |
670 | */ | |
9c96477d | 671 | intersected_rule = &rd->reg_rules[rule_idx]; |
1a919318 | 672 | r = reg_rules_intersect(rule1, rule2, intersected_rule); |
fb1fc7ad LR |
673 | /* |
674 | * No need to memset here the intersected rule here as | |
675 | * we're not using the stack anymore | |
676 | */ | |
9c96477d LR |
677 | if (r) |
678 | continue; | |
679 | rule_idx++; | |
680 | } | |
681 | } | |
682 | ||
683 | if (rule_idx != num_rules) { | |
684 | kfree(rd); | |
685 | return NULL; | |
686 | } | |
687 | ||
688 | rd->n_reg_rules = num_rules; | |
689 | rd->alpha2[0] = '9'; | |
690 | rd->alpha2[1] = '8'; | |
691 | ||
692 | return rd; | |
693 | } | |
694 | ||
fb1fc7ad LR |
695 | /* |
696 | * XXX: add support for the rest of enum nl80211_reg_rule_flags, we may | |
697 | * want to just have the channel structure use these | |
698 | */ | |
b2e1b302 LR |
699 | static u32 map_regdom_flags(u32 rd_flags) |
700 | { | |
701 | u32 channel_flags = 0; | |
702 | if (rd_flags & NL80211_RRF_PASSIVE_SCAN) | |
703 | channel_flags |= IEEE80211_CHAN_PASSIVE_SCAN; | |
704 | if (rd_flags & NL80211_RRF_NO_IBSS) | |
705 | channel_flags |= IEEE80211_CHAN_NO_IBSS; | |
706 | if (rd_flags & NL80211_RRF_DFS) | |
707 | channel_flags |= IEEE80211_CHAN_RADAR; | |
03f6b084 SF |
708 | if (rd_flags & NL80211_RRF_NO_OFDM) |
709 | channel_flags |= IEEE80211_CHAN_NO_OFDM; | |
b2e1b302 LR |
710 | return channel_flags; |
711 | } | |
712 | ||
361c9c8b JB |
713 | static const struct ieee80211_reg_rule * |
714 | freq_reg_info_regd(struct wiphy *wiphy, u32 center_freq, | |
715 | const struct ieee80211_regdomain *regd) | |
8318d78a JB |
716 | { |
717 | int i; | |
0c7dc45d | 718 | bool band_rule_found = false; |
038659e7 LR |
719 | bool bw_fits = false; |
720 | ||
3e0c3ff3 | 721 | if (!regd) |
361c9c8b | 722 | return ERR_PTR(-EINVAL); |
b2e1b302 | 723 | |
3e0c3ff3 | 724 | for (i = 0; i < regd->n_reg_rules; i++) { |
b2e1b302 LR |
725 | const struct ieee80211_reg_rule *rr; |
726 | const struct ieee80211_freq_range *fr = NULL; | |
b2e1b302 | 727 | |
3e0c3ff3 | 728 | rr = ®d->reg_rules[i]; |
b2e1b302 | 729 | fr = &rr->freq_range; |
0c7dc45d | 730 | |
fb1fc7ad LR |
731 | /* |
732 | * We only need to know if one frequency rule was | |
0c7dc45d | 733 | * was in center_freq's band, that's enough, so lets |
fb1fc7ad LR |
734 | * not overwrite it once found |
735 | */ | |
0c7dc45d LR |
736 | if (!band_rule_found) |
737 | band_rule_found = freq_in_rule_band(fr, center_freq); | |
738 | ||
fe7ef5e9 | 739 | bw_fits = reg_does_bw_fit(fr, center_freq, MHZ_TO_KHZ(20)); |
0c7dc45d | 740 | |
361c9c8b JB |
741 | if (band_rule_found && bw_fits) |
742 | return rr; | |
8318d78a JB |
743 | } |
744 | ||
0c7dc45d | 745 | if (!band_rule_found) |
361c9c8b | 746 | return ERR_PTR(-ERANGE); |
0c7dc45d | 747 | |
361c9c8b | 748 | return ERR_PTR(-EINVAL); |
b2e1b302 LR |
749 | } |
750 | ||
361c9c8b JB |
751 | const struct ieee80211_reg_rule *freq_reg_info(struct wiphy *wiphy, |
752 | u32 center_freq) | |
1fa25e41 | 753 | { |
5d885b99 | 754 | const struct ieee80211_regdomain *regd; |
c492db37 | 755 | struct regulatory_request *lr = get_last_request(); |
1a919318 | 756 | |
5d885b99 JB |
757 | /* |
758 | * Follow the driver's regulatory domain, if present, unless a country | |
759 | * IE has been processed or a user wants to help complaince further | |
760 | */ | |
c492db37 JB |
761 | if (lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && |
762 | lr->initiator != NL80211_REGDOM_SET_BY_USER && | |
5d885b99 | 763 | wiphy->regd) |
458f4f9e | 764 | regd = get_wiphy_regdom(wiphy); |
5d885b99 | 765 | else |
458f4f9e | 766 | regd = get_cfg80211_regdom(); |
5d885b99 | 767 | |
361c9c8b | 768 | return freq_reg_info_regd(wiphy, center_freq, regd); |
1fa25e41 | 769 | } |
4f366c5d | 770 | EXPORT_SYMBOL(freq_reg_info); |
b2e1b302 | 771 | |
926a0a09 LR |
772 | #ifdef CONFIG_CFG80211_REG_DEBUG |
773 | static const char *reg_initiator_name(enum nl80211_reg_initiator initiator) | |
774 | { | |
775 | switch (initiator) { | |
776 | case NL80211_REGDOM_SET_BY_CORE: | |
777 | return "Set by core"; | |
778 | case NL80211_REGDOM_SET_BY_USER: | |
779 | return "Set by user"; | |
780 | case NL80211_REGDOM_SET_BY_DRIVER: | |
781 | return "Set by driver"; | |
782 | case NL80211_REGDOM_SET_BY_COUNTRY_IE: | |
783 | return "Set by country IE"; | |
784 | default: | |
785 | WARN_ON(1); | |
786 | return "Set by bug"; | |
787 | } | |
788 | } | |
e702d3cf LR |
789 | |
790 | static void chan_reg_rule_print_dbg(struct ieee80211_channel *chan, | |
e702d3cf LR |
791 | const struct ieee80211_reg_rule *reg_rule) |
792 | { | |
793 | const struct ieee80211_power_rule *power_rule; | |
794 | const struct ieee80211_freq_range *freq_range; | |
795 | char max_antenna_gain[32]; | |
796 | ||
797 | power_rule = ®_rule->power_rule; | |
798 | freq_range = ®_rule->freq_range; | |
799 | ||
800 | if (!power_rule->max_antenna_gain) | |
801 | snprintf(max_antenna_gain, 32, "N/A"); | |
802 | else | |
803 | snprintf(max_antenna_gain, 32, "%d", power_rule->max_antenna_gain); | |
804 | ||
fe7ef5e9 JB |
805 | REG_DBG_PRINT("Updating information on frequency %d MHz with regulatory rule:\n", |
806 | chan->center_freq); | |
e702d3cf | 807 | |
56e6786e | 808 | REG_DBG_PRINT("%d KHz - %d KHz @ %d KHz), (%s mBi, %d mBm)\n", |
1a919318 JB |
809 | freq_range->start_freq_khz, freq_range->end_freq_khz, |
810 | freq_range->max_bandwidth_khz, max_antenna_gain, | |
e702d3cf LR |
811 | power_rule->max_eirp); |
812 | } | |
813 | #else | |
814 | static void chan_reg_rule_print_dbg(struct ieee80211_channel *chan, | |
e702d3cf LR |
815 | const struct ieee80211_reg_rule *reg_rule) |
816 | { | |
817 | return; | |
818 | } | |
926a0a09 LR |
819 | #endif |
820 | ||
038659e7 LR |
821 | /* |
822 | * Note that right now we assume the desired channel bandwidth | |
823 | * is always 20 MHz for each individual channel (HT40 uses 20 MHz | |
fe7ef5e9 | 824 | * per channel, the primary and the extension channel). |
038659e7 | 825 | */ |
7ca43d03 LR |
826 | static void handle_channel(struct wiphy *wiphy, |
827 | enum nl80211_reg_initiator initiator, | |
fdc9d7b2 | 828 | struct ieee80211_channel *chan) |
b2e1b302 | 829 | { |
038659e7 | 830 | u32 flags, bw_flags = 0; |
b2e1b302 LR |
831 | const struct ieee80211_reg_rule *reg_rule = NULL; |
832 | const struct ieee80211_power_rule *power_rule = NULL; | |
038659e7 | 833 | const struct ieee80211_freq_range *freq_range = NULL; |
fe33eb39 | 834 | struct wiphy *request_wiphy = NULL; |
c492db37 | 835 | struct regulatory_request *lr = get_last_request(); |
a92a3ce7 | 836 | |
c492db37 | 837 | request_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx); |
a92a3ce7 LR |
838 | |
839 | flags = chan->orig_flags; | |
b2e1b302 | 840 | |
361c9c8b JB |
841 | reg_rule = freq_reg_info(wiphy, MHZ_TO_KHZ(chan->center_freq)); |
842 | if (IS_ERR(reg_rule)) { | |
ca4ffe8f LR |
843 | /* |
844 | * We will disable all channels that do not match our | |
25985edc | 845 | * received regulatory rule unless the hint is coming |
ca4ffe8f LR |
846 | * from a Country IE and the Country IE had no information |
847 | * about a band. The IEEE 802.11 spec allows for an AP | |
848 | * to send only a subset of the regulatory rules allowed, | |
849 | * so an AP in the US that only supports 2.4 GHz may only send | |
850 | * a country IE with information for the 2.4 GHz band | |
851 | * while 5 GHz is still supported. | |
852 | */ | |
853 | if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE && | |
361c9c8b | 854 | PTR_ERR(reg_rule) == -ERANGE) |
ca4ffe8f LR |
855 | return; |
856 | ||
d91e41b6 | 857 | REG_DBG_PRINT("Disabling freq %d MHz\n", chan->center_freq); |
ca4ffe8f | 858 | chan->flags = IEEE80211_CHAN_DISABLED; |
8318d78a | 859 | return; |
ca4ffe8f | 860 | } |
8318d78a | 861 | |
fe7ef5e9 | 862 | chan_reg_rule_print_dbg(chan, reg_rule); |
e702d3cf | 863 | |
b2e1b302 | 864 | power_rule = ®_rule->power_rule; |
038659e7 LR |
865 | freq_range = ®_rule->freq_range; |
866 | ||
867 | if (freq_range->max_bandwidth_khz < MHZ_TO_KHZ(40)) | |
868 | bw_flags = IEEE80211_CHAN_NO_HT40; | |
c7a6ee27 JB |
869 | if (freq_range->max_bandwidth_khz < MHZ_TO_KHZ(80)) |
870 | bw_flags |= IEEE80211_CHAN_NO_80MHZ; | |
871 | if (freq_range->max_bandwidth_khz < MHZ_TO_KHZ(160)) | |
872 | bw_flags |= IEEE80211_CHAN_NO_160MHZ; | |
b2e1b302 | 873 | |
c492db37 | 874 | if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER && |
806a9e39 | 875 | request_wiphy && request_wiphy == wiphy && |
5be83de5 | 876 | request_wiphy->flags & WIPHY_FLAG_STRICT_REGULATORY) { |
fb1fc7ad | 877 | /* |
25985edc | 878 | * This guarantees the driver's requested regulatory domain |
f976376d | 879 | * will always be used as a base for further regulatory |
fb1fc7ad LR |
880 | * settings |
881 | */ | |
f976376d | 882 | chan->flags = chan->orig_flags = |
038659e7 | 883 | map_regdom_flags(reg_rule->flags) | bw_flags; |
f976376d LR |
884 | chan->max_antenna_gain = chan->orig_mag = |
885 | (int) MBI_TO_DBI(power_rule->max_antenna_gain); | |
279f0f55 | 886 | chan->max_reg_power = chan->max_power = chan->orig_mpwr = |
f976376d LR |
887 | (int) MBM_TO_DBM(power_rule->max_eirp); |
888 | return; | |
889 | } | |
890 | ||
04f39047 SW |
891 | chan->dfs_state = NL80211_DFS_USABLE; |
892 | chan->dfs_state_entered = jiffies; | |
893 | ||
aa3d7eef | 894 | chan->beacon_found = false; |
038659e7 | 895 | chan->flags = flags | bw_flags | map_regdom_flags(reg_rule->flags); |
1a919318 JB |
896 | chan->max_antenna_gain = |
897 | min_t(int, chan->orig_mag, | |
898 | MBI_TO_DBI(power_rule->max_antenna_gain)); | |
eccc068e | 899 | chan->max_reg_power = (int) MBM_TO_DBM(power_rule->max_eirp); |
5e31fc08 SG |
900 | if (chan->orig_mpwr) { |
901 | /* | |
902 | * Devices that have their own custom regulatory domain | |
903 | * but also use WIPHY_FLAG_STRICT_REGULATORY will follow the | |
904 | * passed country IE power settings. | |
905 | */ | |
906 | if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE && | |
907 | wiphy->flags & WIPHY_FLAG_CUSTOM_REGULATORY && | |
908 | wiphy->flags & WIPHY_FLAG_STRICT_REGULATORY) | |
909 | chan->max_power = chan->max_reg_power; | |
910 | else | |
911 | chan->max_power = min(chan->orig_mpwr, | |
912 | chan->max_reg_power); | |
913 | } else | |
914 | chan->max_power = chan->max_reg_power; | |
8318d78a JB |
915 | } |
916 | ||
7ca43d03 | 917 | static void handle_band(struct wiphy *wiphy, |
fdc9d7b2 JB |
918 | enum nl80211_reg_initiator initiator, |
919 | struct ieee80211_supported_band *sband) | |
8318d78a | 920 | { |
a92a3ce7 | 921 | unsigned int i; |
a92a3ce7 | 922 | |
fdc9d7b2 JB |
923 | if (!sband) |
924 | return; | |
8318d78a JB |
925 | |
926 | for (i = 0; i < sband->n_channels; i++) | |
fdc9d7b2 | 927 | handle_channel(wiphy, initiator, &sband->channels[i]); |
8318d78a JB |
928 | } |
929 | ||
57b5ce07 LR |
930 | static bool reg_request_cell_base(struct regulatory_request *request) |
931 | { | |
932 | if (request->initiator != NL80211_REGDOM_SET_BY_USER) | |
933 | return false; | |
1a919318 | 934 | return request->user_reg_hint_type == NL80211_USER_REG_HINT_CELL_BASE; |
57b5ce07 LR |
935 | } |
936 | ||
937 | bool reg_last_request_cell_base(void) | |
938 | { | |
ebd0fd2b | 939 | bool val; |
57b5ce07 LR |
940 | |
941 | mutex_lock(®_mutex); | |
c492db37 | 942 | val = reg_request_cell_base(get_last_request()); |
57b5ce07 | 943 | mutex_unlock(®_mutex); |
1a919318 | 944 | |
ebd0fd2b | 945 | return val; |
57b5ce07 LR |
946 | } |
947 | ||
948 | #ifdef CONFIG_CFG80211_CERTIFICATION_ONUS | |
57b5ce07 | 949 | /* Core specific check */ |
2f92212b JB |
950 | static enum reg_request_treatment |
951 | reg_ignore_cell_hint(struct regulatory_request *pending_request) | |
57b5ce07 | 952 | { |
c492db37 JB |
953 | struct regulatory_request *lr = get_last_request(); |
954 | ||
57b5ce07 | 955 | if (!reg_num_devs_support_basehint) |
2f92212b | 956 | return REG_REQ_IGNORE; |
57b5ce07 | 957 | |
c492db37 | 958 | if (reg_request_cell_base(lr) && |
1a919318 | 959 | !regdom_changes(pending_request->alpha2)) |
2f92212b | 960 | return REG_REQ_ALREADY_SET; |
1a919318 | 961 | |
2f92212b | 962 | return REG_REQ_OK; |
57b5ce07 LR |
963 | } |
964 | ||
965 | /* Device specific check */ | |
966 | static bool reg_dev_ignore_cell_hint(struct wiphy *wiphy) | |
967 | { | |
1a919318 | 968 | return !(wiphy->features & NL80211_FEATURE_CELL_BASE_REG_HINTS); |
57b5ce07 LR |
969 | } |
970 | #else | |
971 | static int reg_ignore_cell_hint(struct regulatory_request *pending_request) | |
972 | { | |
2f92212b | 973 | return REG_REQ_IGNORE; |
57b5ce07 | 974 | } |
1a919318 JB |
975 | |
976 | static bool reg_dev_ignore_cell_hint(struct wiphy *wiphy) | |
57b5ce07 LR |
977 | { |
978 | return true; | |
979 | } | |
980 | #endif | |
981 | ||
982 | ||
7db90f4a LR |
983 | static bool ignore_reg_update(struct wiphy *wiphy, |
984 | enum nl80211_reg_initiator initiator) | |
14b9815a | 985 | { |
c492db37 JB |
986 | struct regulatory_request *lr = get_last_request(); |
987 | ||
988 | if (!lr) { | |
1a919318 | 989 | REG_DBG_PRINT("Ignoring regulatory request %s since last_request is not set\n", |
926a0a09 | 990 | reg_initiator_name(initiator)); |
14b9815a | 991 | return true; |
926a0a09 LR |
992 | } |
993 | ||
7db90f4a | 994 | if (initiator == NL80211_REGDOM_SET_BY_CORE && |
926a0a09 | 995 | wiphy->flags & WIPHY_FLAG_CUSTOM_REGULATORY) { |
1a919318 | 996 | REG_DBG_PRINT("Ignoring regulatory request %s since the driver uses its own custom regulatory domain\n", |
926a0a09 | 997 | reg_initiator_name(initiator)); |
14b9815a | 998 | return true; |
926a0a09 LR |
999 | } |
1000 | ||
fb1fc7ad LR |
1001 | /* |
1002 | * wiphy->regd will be set once the device has its own | |
1003 | * desired regulatory domain set | |
1004 | */ | |
5be83de5 | 1005 | if (wiphy->flags & WIPHY_FLAG_STRICT_REGULATORY && !wiphy->regd && |
749b527b | 1006 | initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && |
c492db37 | 1007 | !is_world_regdom(lr->alpha2)) { |
1a919318 | 1008 | REG_DBG_PRINT("Ignoring regulatory request %s since the driver requires its own regulatory domain to be set first\n", |
926a0a09 | 1009 | reg_initiator_name(initiator)); |
14b9815a | 1010 | return true; |
926a0a09 LR |
1011 | } |
1012 | ||
c492db37 | 1013 | if (reg_request_cell_base(lr)) |
57b5ce07 LR |
1014 | return reg_dev_ignore_cell_hint(wiphy); |
1015 | ||
14b9815a LR |
1016 | return false; |
1017 | } | |
1018 | ||
3195e489 LR |
1019 | static bool reg_is_world_roaming(struct wiphy *wiphy) |
1020 | { | |
1021 | const struct ieee80211_regdomain *cr = get_cfg80211_regdom(); | |
1022 | const struct ieee80211_regdomain *wr = get_wiphy_regdom(wiphy); | |
1023 | struct regulatory_request *lr = get_last_request(); | |
1024 | ||
1025 | if (is_world_regdom(cr->alpha2) || (wr && is_world_regdom(wr->alpha2))) | |
1026 | return true; | |
1027 | ||
1028 | if (lr && lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && | |
1029 | wiphy->flags & WIPHY_FLAG_CUSTOM_REGULATORY) | |
1030 | return true; | |
1031 | ||
1032 | return false; | |
1033 | } | |
1034 | ||
1a919318 | 1035 | static void handle_reg_beacon(struct wiphy *wiphy, unsigned int chan_idx, |
e38f8a7a LR |
1036 | struct reg_beacon *reg_beacon) |
1037 | { | |
e38f8a7a LR |
1038 | struct ieee80211_supported_band *sband; |
1039 | struct ieee80211_channel *chan; | |
6bad8766 LR |
1040 | bool channel_changed = false; |
1041 | struct ieee80211_channel chan_before; | |
e38f8a7a | 1042 | |
e38f8a7a LR |
1043 | sband = wiphy->bands[reg_beacon->chan.band]; |
1044 | chan = &sband->channels[chan_idx]; | |
1045 | ||
1046 | if (likely(chan->center_freq != reg_beacon->chan.center_freq)) | |
1047 | return; | |
1048 | ||
6bad8766 LR |
1049 | if (chan->beacon_found) |
1050 | return; | |
1051 | ||
1052 | chan->beacon_found = true; | |
1053 | ||
0f500a5f LR |
1054 | if (!reg_is_world_roaming(wiphy)) |
1055 | return; | |
1056 | ||
5be83de5 | 1057 | if (wiphy->flags & WIPHY_FLAG_DISABLE_BEACON_HINTS) |
37184244 LR |
1058 | return; |
1059 | ||
6bad8766 LR |
1060 | chan_before.center_freq = chan->center_freq; |
1061 | chan_before.flags = chan->flags; | |
1062 | ||
37184244 | 1063 | if (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN) { |
e38f8a7a | 1064 | chan->flags &= ~IEEE80211_CHAN_PASSIVE_SCAN; |
6bad8766 | 1065 | channel_changed = true; |
e38f8a7a LR |
1066 | } |
1067 | ||
37184244 | 1068 | if (chan->flags & IEEE80211_CHAN_NO_IBSS) { |
e38f8a7a | 1069 | chan->flags &= ~IEEE80211_CHAN_NO_IBSS; |
6bad8766 | 1070 | channel_changed = true; |
e38f8a7a LR |
1071 | } |
1072 | ||
6bad8766 LR |
1073 | if (channel_changed) |
1074 | nl80211_send_beacon_hint_event(wiphy, &chan_before, chan); | |
e38f8a7a LR |
1075 | } |
1076 | ||
1077 | /* | |
1078 | * Called when a scan on a wiphy finds a beacon on | |
1079 | * new channel | |
1080 | */ | |
1081 | static void wiphy_update_new_beacon(struct wiphy *wiphy, | |
1082 | struct reg_beacon *reg_beacon) | |
1083 | { | |
1084 | unsigned int i; | |
1085 | struct ieee80211_supported_band *sband; | |
1086 | ||
e38f8a7a LR |
1087 | if (!wiphy->bands[reg_beacon->chan.band]) |
1088 | return; | |
1089 | ||
1090 | sband = wiphy->bands[reg_beacon->chan.band]; | |
1091 | ||
1092 | for (i = 0; i < sband->n_channels; i++) | |
1093 | handle_reg_beacon(wiphy, i, reg_beacon); | |
1094 | } | |
1095 | ||
1096 | /* | |
1097 | * Called upon reg changes or a new wiphy is added | |
1098 | */ | |
1099 | static void wiphy_update_beacon_reg(struct wiphy *wiphy) | |
1100 | { | |
1101 | unsigned int i; | |
1102 | struct ieee80211_supported_band *sband; | |
1103 | struct reg_beacon *reg_beacon; | |
1104 | ||
e38f8a7a LR |
1105 | list_for_each_entry(reg_beacon, ®_beacon_list, list) { |
1106 | if (!wiphy->bands[reg_beacon->chan.band]) | |
1107 | continue; | |
1108 | sband = wiphy->bands[reg_beacon->chan.band]; | |
1109 | for (i = 0; i < sband->n_channels; i++) | |
1110 | handle_reg_beacon(wiphy, i, reg_beacon); | |
1111 | } | |
1112 | } | |
1113 | ||
e38f8a7a LR |
1114 | /* Reap the advantages of previously found beacons */ |
1115 | static void reg_process_beacons(struct wiphy *wiphy) | |
1116 | { | |
b1ed8ddd LR |
1117 | /* |
1118 | * Means we are just firing up cfg80211, so no beacons would | |
1119 | * have been processed yet. | |
1120 | */ | |
1121 | if (!last_request) | |
1122 | return; | |
e38f8a7a LR |
1123 | wiphy_update_beacon_reg(wiphy); |
1124 | } | |
1125 | ||
1a919318 | 1126 | static bool is_ht40_allowed(struct ieee80211_channel *chan) |
038659e7 LR |
1127 | { |
1128 | if (!chan) | |
1a919318 | 1129 | return false; |
038659e7 | 1130 | if (chan->flags & IEEE80211_CHAN_DISABLED) |
1a919318 | 1131 | return false; |
038659e7 | 1132 | /* This would happen when regulatory rules disallow HT40 completely */ |
55b183ad FF |
1133 | if ((chan->flags & IEEE80211_CHAN_NO_HT40) == IEEE80211_CHAN_NO_HT40) |
1134 | return false; | |
1135 | return true; | |
038659e7 LR |
1136 | } |
1137 | ||
1138 | static void reg_process_ht_flags_channel(struct wiphy *wiphy, | |
fdc9d7b2 | 1139 | struct ieee80211_channel *channel) |
038659e7 | 1140 | { |
fdc9d7b2 | 1141 | struct ieee80211_supported_band *sband = wiphy->bands[channel->band]; |
038659e7 LR |
1142 | struct ieee80211_channel *channel_before = NULL, *channel_after = NULL; |
1143 | unsigned int i; | |
1144 | ||
1a919318 | 1145 | if (!is_ht40_allowed(channel)) { |
038659e7 LR |
1146 | channel->flags |= IEEE80211_CHAN_NO_HT40; |
1147 | return; | |
1148 | } | |
1149 | ||
1150 | /* | |
1151 | * We need to ensure the extension channels exist to | |
1152 | * be able to use HT40- or HT40+, this finds them (or not) | |
1153 | */ | |
1154 | for (i = 0; i < sband->n_channels; i++) { | |
1155 | struct ieee80211_channel *c = &sband->channels[i]; | |
1a919318 | 1156 | |
038659e7 LR |
1157 | if (c->center_freq == (channel->center_freq - 20)) |
1158 | channel_before = c; | |
1159 | if (c->center_freq == (channel->center_freq + 20)) | |
1160 | channel_after = c; | |
1161 | } | |
1162 | ||
1163 | /* | |
1164 | * Please note that this assumes target bandwidth is 20 MHz, | |
1165 | * if that ever changes we also need to change the below logic | |
1166 | * to include that as well. | |
1167 | */ | |
1a919318 | 1168 | if (!is_ht40_allowed(channel_before)) |
689da1b3 | 1169 | channel->flags |= IEEE80211_CHAN_NO_HT40MINUS; |
038659e7 | 1170 | else |
689da1b3 | 1171 | channel->flags &= ~IEEE80211_CHAN_NO_HT40MINUS; |
038659e7 | 1172 | |
1a919318 | 1173 | if (!is_ht40_allowed(channel_after)) |
689da1b3 | 1174 | channel->flags |= IEEE80211_CHAN_NO_HT40PLUS; |
038659e7 | 1175 | else |
689da1b3 | 1176 | channel->flags &= ~IEEE80211_CHAN_NO_HT40PLUS; |
038659e7 LR |
1177 | } |
1178 | ||
1179 | static void reg_process_ht_flags_band(struct wiphy *wiphy, | |
fdc9d7b2 | 1180 | struct ieee80211_supported_band *sband) |
038659e7 LR |
1181 | { |
1182 | unsigned int i; | |
038659e7 | 1183 | |
fdc9d7b2 JB |
1184 | if (!sband) |
1185 | return; | |
038659e7 LR |
1186 | |
1187 | for (i = 0; i < sband->n_channels; i++) | |
fdc9d7b2 | 1188 | reg_process_ht_flags_channel(wiphy, &sband->channels[i]); |
038659e7 LR |
1189 | } |
1190 | ||
1191 | static void reg_process_ht_flags(struct wiphy *wiphy) | |
1192 | { | |
1193 | enum ieee80211_band band; | |
1194 | ||
1195 | if (!wiphy) | |
1196 | return; | |
1197 | ||
fdc9d7b2 JB |
1198 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) |
1199 | reg_process_ht_flags_band(wiphy, wiphy->bands[band]); | |
038659e7 LR |
1200 | } |
1201 | ||
eac03e38 SN |
1202 | static void wiphy_update_regulatory(struct wiphy *wiphy, |
1203 | enum nl80211_reg_initiator initiator) | |
b2e1b302 LR |
1204 | { |
1205 | enum ieee80211_band band; | |
c492db37 | 1206 | struct regulatory_request *lr = get_last_request(); |
eac03e38 | 1207 | |
7db90f4a | 1208 | if (ignore_reg_update(wiphy, initiator)) |
a203c2aa SN |
1209 | return; |
1210 | ||
c492db37 | 1211 | lr->dfs_region = get_cfg80211_regdom()->dfs_region; |
b68e6b3b | 1212 | |
fdc9d7b2 JB |
1213 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) |
1214 | handle_band(wiphy, initiator, wiphy->bands[band]); | |
a203c2aa | 1215 | |
e38f8a7a | 1216 | reg_process_beacons(wiphy); |
038659e7 | 1217 | reg_process_ht_flags(wiphy); |
1a919318 | 1218 | |
560e28e1 | 1219 | if (wiphy->reg_notifier) |
c492db37 | 1220 | wiphy->reg_notifier(wiphy, lr); |
b2e1b302 LR |
1221 | } |
1222 | ||
d7549cbb SN |
1223 | static void update_all_wiphy_regulatory(enum nl80211_reg_initiator initiator) |
1224 | { | |
1225 | struct cfg80211_registered_device *rdev; | |
4a38994f | 1226 | struct wiphy *wiphy; |
d7549cbb | 1227 | |
458f4f9e JB |
1228 | assert_cfg80211_lock(); |
1229 | ||
4a38994f RM |
1230 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) { |
1231 | wiphy = &rdev->wiphy; | |
1232 | wiphy_update_regulatory(wiphy, initiator); | |
1233 | /* | |
1234 | * Regulatory updates set by CORE are ignored for custom | |
1235 | * regulatory cards. Let us notify the changes to the driver, | |
1236 | * as some drivers used this to restore its orig_* reg domain. | |
1237 | */ | |
1238 | if (initiator == NL80211_REGDOM_SET_BY_CORE && | |
1239 | wiphy->flags & WIPHY_FLAG_CUSTOM_REGULATORY && | |
1240 | wiphy->reg_notifier) | |
c492db37 | 1241 | wiphy->reg_notifier(wiphy, get_last_request()); |
4a38994f | 1242 | } |
d7549cbb SN |
1243 | } |
1244 | ||
1fa25e41 | 1245 | static void handle_channel_custom(struct wiphy *wiphy, |
fdc9d7b2 | 1246 | struct ieee80211_channel *chan, |
1fa25e41 LR |
1247 | const struct ieee80211_regdomain *regd) |
1248 | { | |
038659e7 | 1249 | u32 bw_flags = 0; |
1fa25e41 LR |
1250 | const struct ieee80211_reg_rule *reg_rule = NULL; |
1251 | const struct ieee80211_power_rule *power_rule = NULL; | |
038659e7 | 1252 | const struct ieee80211_freq_range *freq_range = NULL; |
ac46d48e | 1253 | |
361c9c8b JB |
1254 | reg_rule = freq_reg_info_regd(wiphy, MHZ_TO_KHZ(chan->center_freq), |
1255 | regd); | |
1fa25e41 | 1256 | |
361c9c8b | 1257 | if (IS_ERR(reg_rule)) { |
fe7ef5e9 JB |
1258 | REG_DBG_PRINT("Disabling freq %d MHz as custom regd has no rule that fits it\n", |
1259 | chan->center_freq); | |
1fa25e41 LR |
1260 | chan->flags = IEEE80211_CHAN_DISABLED; |
1261 | return; | |
1262 | } | |
1263 | ||
fe7ef5e9 | 1264 | chan_reg_rule_print_dbg(chan, reg_rule); |
e702d3cf | 1265 | |
1fa25e41 | 1266 | power_rule = ®_rule->power_rule; |
038659e7 LR |
1267 | freq_range = ®_rule->freq_range; |
1268 | ||
1269 | if (freq_range->max_bandwidth_khz < MHZ_TO_KHZ(40)) | |
1270 | bw_flags = IEEE80211_CHAN_NO_HT40; | |
c7a6ee27 JB |
1271 | if (freq_range->max_bandwidth_khz < MHZ_TO_KHZ(80)) |
1272 | bw_flags |= IEEE80211_CHAN_NO_80MHZ; | |
1273 | if (freq_range->max_bandwidth_khz < MHZ_TO_KHZ(160)) | |
1274 | bw_flags |= IEEE80211_CHAN_NO_160MHZ; | |
1fa25e41 | 1275 | |
038659e7 | 1276 | chan->flags |= map_regdom_flags(reg_rule->flags) | bw_flags; |
1fa25e41 | 1277 | chan->max_antenna_gain = (int) MBI_TO_DBI(power_rule->max_antenna_gain); |
279f0f55 FF |
1278 | chan->max_reg_power = chan->max_power = |
1279 | (int) MBM_TO_DBM(power_rule->max_eirp); | |
1fa25e41 LR |
1280 | } |
1281 | ||
fdc9d7b2 JB |
1282 | static void handle_band_custom(struct wiphy *wiphy, |
1283 | struct ieee80211_supported_band *sband, | |
1fa25e41 LR |
1284 | const struct ieee80211_regdomain *regd) |
1285 | { | |
1286 | unsigned int i; | |
1fa25e41 | 1287 | |
fdc9d7b2 JB |
1288 | if (!sband) |
1289 | return; | |
1fa25e41 LR |
1290 | |
1291 | for (i = 0; i < sband->n_channels; i++) | |
fdc9d7b2 | 1292 | handle_channel_custom(wiphy, &sband->channels[i], regd); |
1fa25e41 LR |
1293 | } |
1294 | ||
1295 | /* Used by drivers prior to wiphy registration */ | |
1296 | void wiphy_apply_custom_regulatory(struct wiphy *wiphy, | |
1297 | const struct ieee80211_regdomain *regd) | |
1298 | { | |
1299 | enum ieee80211_band band; | |
bbcf3f02 | 1300 | unsigned int bands_set = 0; |
ac46d48e | 1301 | |
1fa25e41 | 1302 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) { |
bbcf3f02 LR |
1303 | if (!wiphy->bands[band]) |
1304 | continue; | |
fdc9d7b2 | 1305 | handle_band_custom(wiphy, wiphy->bands[band], regd); |
bbcf3f02 | 1306 | bands_set++; |
b2e1b302 | 1307 | } |
bbcf3f02 LR |
1308 | |
1309 | /* | |
1310 | * no point in calling this if it won't have any effect | |
1a919318 | 1311 | * on your device's supported bands. |
bbcf3f02 LR |
1312 | */ |
1313 | WARN_ON(!bands_set); | |
b2e1b302 | 1314 | } |
1fa25e41 LR |
1315 | EXPORT_SYMBOL(wiphy_apply_custom_regulatory); |
1316 | ||
84fa4f43 JB |
1317 | /* This has the logic which determines when a new request |
1318 | * should be ignored. */ | |
2f92212b JB |
1319 | static enum reg_request_treatment |
1320 | get_reg_request_treatment(struct wiphy *wiphy, | |
2f92cd2e | 1321 | struct regulatory_request *pending_request) |
84fa4f43 | 1322 | { |
806a9e39 | 1323 | struct wiphy *last_wiphy = NULL; |
c492db37 | 1324 | struct regulatory_request *lr = get_last_request(); |
761cf7ec | 1325 | |
84fa4f43 | 1326 | /* All initial requests are respected */ |
c492db37 | 1327 | if (!lr) |
2f92212b | 1328 | return REG_REQ_OK; |
84fa4f43 | 1329 | |
2f92cd2e | 1330 | switch (pending_request->initiator) { |
7db90f4a | 1331 | case NL80211_REGDOM_SET_BY_CORE: |
2f92212b | 1332 | return REG_REQ_OK; |
7db90f4a | 1333 | case NL80211_REGDOM_SET_BY_COUNTRY_IE: |
c492db37 | 1334 | if (reg_request_cell_base(lr)) { |
57b5ce07 LR |
1335 | /* Trust a Cell base station over the AP's country IE */ |
1336 | if (regdom_changes(pending_request->alpha2)) | |
2f92212b JB |
1337 | return REG_REQ_IGNORE; |
1338 | return REG_REQ_ALREADY_SET; | |
57b5ce07 LR |
1339 | } |
1340 | ||
c492db37 | 1341 | last_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx); |
806a9e39 | 1342 | |
2f92cd2e | 1343 | if (unlikely(!is_an_alpha2(pending_request->alpha2))) |
84fa4f43 | 1344 | return -EINVAL; |
c492db37 | 1345 | if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) { |
806a9e39 | 1346 | if (last_wiphy != wiphy) { |
84fa4f43 JB |
1347 | /* |
1348 | * Two cards with two APs claiming different | |
1fe90b03 | 1349 | * Country IE alpha2s. We could |
84fa4f43 JB |
1350 | * intersect them, but that seems unlikely |
1351 | * to be correct. Reject second one for now. | |
1352 | */ | |
2f92cd2e | 1353 | if (regdom_changes(pending_request->alpha2)) |
2f92212b JB |
1354 | return REG_REQ_IGNORE; |
1355 | return REG_REQ_ALREADY_SET; | |
84fa4f43 | 1356 | } |
fb1fc7ad LR |
1357 | /* |
1358 | * Two consecutive Country IE hints on the same wiphy. | |
1359 | * This should be picked up early by the driver/stack | |
1360 | */ | |
2f92cd2e | 1361 | if (WARN_ON(regdom_changes(pending_request->alpha2))) |
2f92212b JB |
1362 | return REG_REQ_OK; |
1363 | return REG_REQ_ALREADY_SET; | |
84fa4f43 | 1364 | } |
a171fba4 | 1365 | return 0; |
7db90f4a | 1366 | case NL80211_REGDOM_SET_BY_DRIVER: |
c492db37 | 1367 | if (lr->initiator == NL80211_REGDOM_SET_BY_CORE) { |
2f92cd2e | 1368 | if (regdom_changes(pending_request->alpha2)) |
2f92212b JB |
1369 | return REG_REQ_OK; |
1370 | return REG_REQ_ALREADY_SET; | |
e74b1e7f | 1371 | } |
fff32c04 LR |
1372 | |
1373 | /* | |
1374 | * This would happen if you unplug and plug your card | |
1375 | * back in or if you add a new device for which the previously | |
1376 | * loaded card also agrees on the regulatory domain. | |
1377 | */ | |
c492db37 | 1378 | if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER && |
2f92cd2e | 1379 | !regdom_changes(pending_request->alpha2)) |
2f92212b | 1380 | return REG_REQ_ALREADY_SET; |
fff32c04 | 1381 | |
2f92212b | 1382 | return REG_REQ_INTERSECT; |
7db90f4a | 1383 | case NL80211_REGDOM_SET_BY_USER: |
57b5ce07 LR |
1384 | if (reg_request_cell_base(pending_request)) |
1385 | return reg_ignore_cell_hint(pending_request); | |
1386 | ||
c492db37 | 1387 | if (reg_request_cell_base(lr)) |
2f92212b | 1388 | return REG_REQ_IGNORE; |
57b5ce07 | 1389 | |
c492db37 | 1390 | if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) |
2f92212b | 1391 | return REG_REQ_INTERSECT; |
fb1fc7ad LR |
1392 | /* |
1393 | * If the user knows better the user should set the regdom | |
1394 | * to their country before the IE is picked up | |
1395 | */ | |
c492db37 JB |
1396 | if (lr->initiator == NL80211_REGDOM_SET_BY_USER && |
1397 | lr->intersect) | |
2f92212b | 1398 | return REG_REQ_IGNORE; |
fb1fc7ad LR |
1399 | /* |
1400 | * Process user requests only after previous user/driver/core | |
1401 | * requests have been processed | |
1402 | */ | |
c492db37 JB |
1403 | if ((lr->initiator == NL80211_REGDOM_SET_BY_CORE || |
1404 | lr->initiator == NL80211_REGDOM_SET_BY_DRIVER || | |
1405 | lr->initiator == NL80211_REGDOM_SET_BY_USER) && | |
1406 | regdom_changes(lr->alpha2)) | |
2f92212b | 1407 | return REG_REQ_IGNORE; |
5eebade6 | 1408 | |
baeb66fe | 1409 | if (!regdom_changes(pending_request->alpha2)) |
2f92212b | 1410 | return REG_REQ_ALREADY_SET; |
e74b1e7f | 1411 | |
2f92212b | 1412 | return REG_REQ_OK; |
84fa4f43 JB |
1413 | } |
1414 | ||
2f92212b | 1415 | return REG_REQ_IGNORE; |
84fa4f43 JB |
1416 | } |
1417 | ||
b2e253cf LR |
1418 | static void reg_set_request_processed(void) |
1419 | { | |
1420 | bool need_more_processing = false; | |
c492db37 | 1421 | struct regulatory_request *lr = get_last_request(); |
b2e253cf | 1422 | |
c492db37 | 1423 | lr->processed = true; |
b2e253cf LR |
1424 | |
1425 | spin_lock(®_requests_lock); | |
1426 | if (!list_empty(®_requests_list)) | |
1427 | need_more_processing = true; | |
1428 | spin_unlock(®_requests_lock); | |
1429 | ||
c492db37 | 1430 | if (lr->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 | 1445 | * |
2f92212b | 1446 | * Returns one of the different reg request treatment values. |
d1c96a9a | 1447 | * |
458f4f9e | 1448 | * Caller must hold ®_mutex |
d1c96a9a | 1449 | */ |
2f92212b JB |
1450 | static enum reg_request_treatment |
1451 | __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; |
2f92212b | 1456 | enum reg_request_treatment treatment; |
c492db37 | 1457 | struct regulatory_request *lr; |
761cf7ec | 1458 | |
2f92212b | 1459 | treatment = get_reg_request_treatment(wiphy, pending_request); |
9c96477d | 1460 | |
2f92212b JB |
1461 | switch (treatment) { |
1462 | case REG_REQ_INTERSECT: | |
7db90f4a LR |
1463 | if (pending_request->initiator == |
1464 | NL80211_REGDOM_SET_BY_DRIVER) { | |
458f4f9e | 1465 | regd = reg_copy_regd(get_cfg80211_regdom()); |
e9763c3c | 1466 | if (IS_ERR(regd)) { |
d951c1dd | 1467 | kfree(pending_request); |
e9763c3c | 1468 | return PTR_ERR(regd); |
d951c1dd | 1469 | } |
458f4f9e | 1470 | rcu_assign_pointer(wiphy->regd, regd); |
3e0c3ff3 | 1471 | } |
9c96477d | 1472 | intersect = true; |
2f92212b JB |
1473 | break; |
1474 | case REG_REQ_OK: | |
1475 | break; | |
1476 | default: | |
fb1fc7ad LR |
1477 | /* |
1478 | * If the regulatory domain being requested by the | |
3e0c3ff3 | 1479 | * driver has already been set just copy it to the |
fb1fc7ad LR |
1480 | * wiphy |
1481 | */ | |
2f92212b JB |
1482 | if (treatment == REG_REQ_ALREADY_SET && |
1483 | pending_request->initiator == NL80211_REGDOM_SET_BY_DRIVER) { | |
458f4f9e | 1484 | regd = reg_copy_regd(get_cfg80211_regdom()); |
e9763c3c | 1485 | if (IS_ERR(regd)) { |
d951c1dd | 1486 | kfree(pending_request); |
2f92212b | 1487 | return REG_REQ_IGNORE; |
d951c1dd | 1488 | } |
2f92212b | 1489 | treatment = REG_REQ_ALREADY_SET; |
458f4f9e | 1490 | rcu_assign_pointer(wiphy->regd, regd); |
3e0c3ff3 LR |
1491 | goto new_request; |
1492 | } | |
d951c1dd | 1493 | kfree(pending_request); |
2f92212b | 1494 | return treatment; |
3e0c3ff3 | 1495 | } |
b2e1b302 | 1496 | |
3e0c3ff3 | 1497 | new_request: |
c492db37 JB |
1498 | lr = get_last_request(); |
1499 | if (lr != &core_request_world && lr) | |
1500 | kfree_rcu(lr, rcu_head); | |
5203cdb6 | 1501 | |
c492db37 JB |
1502 | pending_request->intersect = intersect; |
1503 | pending_request->processed = false; | |
1504 | rcu_assign_pointer(last_request, pending_request); | |
1505 | lr = pending_request; | |
5203cdb6 | 1506 | |
d951c1dd | 1507 | pending_request = NULL; |
3e0c3ff3 | 1508 | |
c492db37 JB |
1509 | if (lr->initiator == NL80211_REGDOM_SET_BY_USER) { |
1510 | user_alpha2[0] = lr->alpha2[0]; | |
1511 | user_alpha2[1] = lr->alpha2[1]; | |
09d989d1 LR |
1512 | } |
1513 | ||
2f92212b JB |
1514 | /* When r == REG_REQ_INTERSECT we do need to call CRDA */ |
1515 | if (treatment != REG_REQ_OK && treatment != REG_REQ_INTERSECT) { | |
73d54c9e LR |
1516 | /* |
1517 | * Since CRDA will not be called in this case as we already | |
1518 | * have applied the requested regulatory domain before we just | |
1519 | * inform userspace we have processed the request | |
1520 | */ | |
2f92212b | 1521 | if (treatment == REG_REQ_ALREADY_SET) { |
c492db37 | 1522 | nl80211_send_reg_change_event(lr); |
b2e253cf LR |
1523 | reg_set_request_processed(); |
1524 | } | |
2f92212b | 1525 | return treatment; |
73d54c9e | 1526 | } |
3e0c3ff3 | 1527 | |
c492db37 | 1528 | if (call_crda(lr->alpha2)) |
2f92212b JB |
1529 | return REG_REQ_IGNORE; |
1530 | return REG_REQ_OK; | |
b2e1b302 LR |
1531 | } |
1532 | ||
30a548c7 | 1533 | /* This processes *all* regulatory hints */ |
8848bef0 LR |
1534 | static void reg_process_hint(struct regulatory_request *reg_request, |
1535 | enum nl80211_reg_initiator reg_initiator) | |
fe33eb39 | 1536 | { |
fe33eb39 LR |
1537 | struct wiphy *wiphy = NULL; |
1538 | ||
fdc9d7b2 JB |
1539 | if (WARN_ON(!reg_request->alpha2)) |
1540 | return; | |
fe33eb39 | 1541 | |
f4173766 | 1542 | if (reg_request->wiphy_idx != WIPHY_IDX_INVALID) |
fe33eb39 LR |
1543 | wiphy = wiphy_idx_to_wiphy(reg_request->wiphy_idx); |
1544 | ||
1a919318 | 1545 | if (reg_initiator == NL80211_REGDOM_SET_BY_DRIVER && !wiphy) { |
d951c1dd | 1546 | kfree(reg_request); |
b0e2880b | 1547 | return; |
fe33eb39 LR |
1548 | } |
1549 | ||
2f92212b JB |
1550 | switch (__regulatory_hint(wiphy, reg_request)) { |
1551 | case REG_REQ_ALREADY_SET: | |
1552 | /* This is required so that the orig_* parameters are saved */ | |
1553 | if (wiphy && wiphy->flags & WIPHY_FLAG_STRICT_REGULATORY) | |
1554 | wiphy_update_regulatory(wiphy, reg_initiator); | |
1555 | break; | |
1556 | default: | |
1557 | if (reg_initiator == NL80211_REGDOM_SET_BY_USER) | |
1558 | schedule_delayed_work(®_timeout, | |
1559 | msecs_to_jiffies(3142)); | |
1560 | break; | |
a90c7a31 | 1561 | } |
fe33eb39 LR |
1562 | } |
1563 | ||
b2e253cf LR |
1564 | /* |
1565 | * Processes regulatory hints, this is all the NL80211_REGDOM_SET_BY_* | |
1566 | * Regulatory hints come on a first come first serve basis and we | |
1567 | * must process each one atomically. | |
1568 | */ | |
fe33eb39 | 1569 | static void reg_process_pending_hints(void) |
b0e2880b | 1570 | { |
c492db37 | 1571 | struct regulatory_request *reg_request, *lr; |
fe33eb39 | 1572 | |
b0e2880b LR |
1573 | mutex_lock(&cfg80211_mutex); |
1574 | mutex_lock(®_mutex); | |
c492db37 | 1575 | lr = get_last_request(); |
b0e2880b | 1576 | |
b2e253cf | 1577 | /* When last_request->processed becomes true this will be rescheduled */ |
c492db37 | 1578 | if (lr && !lr->processed) { |
1a919318 | 1579 | REG_DBG_PRINT("Pending regulatory request, waiting for it to be processed...\n"); |
b2e253cf LR |
1580 | goto out; |
1581 | } | |
1582 | ||
fe33eb39 | 1583 | spin_lock(®_requests_lock); |
fe33eb39 | 1584 | |
b2e253cf | 1585 | if (list_empty(®_requests_list)) { |
d951c1dd | 1586 | spin_unlock(®_requests_lock); |
b2e253cf | 1587 | goto out; |
fe33eb39 | 1588 | } |
b2e253cf LR |
1589 | |
1590 | reg_request = list_first_entry(®_requests_list, | |
1591 | struct regulatory_request, | |
1592 | list); | |
1593 | list_del_init(®_request->list); | |
1594 | ||
fe33eb39 | 1595 | spin_unlock(®_requests_lock); |
b0e2880b | 1596 | |
8848bef0 | 1597 | reg_process_hint(reg_request, reg_request->initiator); |
b2e253cf LR |
1598 | |
1599 | out: | |
b0e2880b LR |
1600 | mutex_unlock(®_mutex); |
1601 | mutex_unlock(&cfg80211_mutex); | |
fe33eb39 LR |
1602 | } |
1603 | ||
e38f8a7a LR |
1604 | /* Processes beacon hints -- this has nothing to do with country IEs */ |
1605 | static void reg_process_pending_beacon_hints(void) | |
1606 | { | |
79c97e97 | 1607 | struct cfg80211_registered_device *rdev; |
e38f8a7a LR |
1608 | struct reg_beacon *pending_beacon, *tmp; |
1609 | ||
1610 | mutex_lock(&cfg80211_mutex); | |
0f500a5f | 1611 | mutex_lock(®_mutex); |
e38f8a7a LR |
1612 | |
1613 | /* This goes through the _pending_ beacon list */ | |
1614 | spin_lock_bh(®_pending_beacons_lock); | |
1615 | ||
e38f8a7a LR |
1616 | list_for_each_entry_safe(pending_beacon, tmp, |
1617 | ®_pending_beacons, list) { | |
e38f8a7a LR |
1618 | list_del_init(&pending_beacon->list); |
1619 | ||
1620 | /* Applies the beacon hint to current wiphys */ | |
79c97e97 JB |
1621 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) |
1622 | wiphy_update_new_beacon(&rdev->wiphy, pending_beacon); | |
e38f8a7a LR |
1623 | |
1624 | /* Remembers the beacon hint for new wiphys or reg changes */ | |
1625 | list_add_tail(&pending_beacon->list, ®_beacon_list); | |
1626 | } | |
1627 | ||
1628 | spin_unlock_bh(®_pending_beacons_lock); | |
0f500a5f | 1629 | mutex_unlock(®_mutex); |
e38f8a7a LR |
1630 | mutex_unlock(&cfg80211_mutex); |
1631 | } | |
1632 | ||
fe33eb39 LR |
1633 | static void reg_todo(struct work_struct *work) |
1634 | { | |
1635 | reg_process_pending_hints(); | |
e38f8a7a | 1636 | reg_process_pending_beacon_hints(); |
fe33eb39 LR |
1637 | } |
1638 | ||
fe33eb39 LR |
1639 | static void queue_regulatory_request(struct regulatory_request *request) |
1640 | { | |
d4f2c881 JB |
1641 | request->alpha2[0] = toupper(request->alpha2[0]); |
1642 | request->alpha2[1] = toupper(request->alpha2[1]); | |
c61029c7 | 1643 | |
fe33eb39 LR |
1644 | spin_lock(®_requests_lock); |
1645 | list_add_tail(&request->list, ®_requests_list); | |
1646 | spin_unlock(®_requests_lock); | |
1647 | ||
1648 | schedule_work(®_work); | |
1649 | } | |
1650 | ||
09d989d1 LR |
1651 | /* |
1652 | * Core regulatory hint -- happens during cfg80211_init() | |
1653 | * and when we restore regulatory settings. | |
1654 | */ | |
ba25c141 LR |
1655 | static int regulatory_hint_core(const char *alpha2) |
1656 | { | |
1657 | struct regulatory_request *request; | |
1658 | ||
1a919318 | 1659 | request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); |
ba25c141 LR |
1660 | if (!request) |
1661 | return -ENOMEM; | |
1662 | ||
1663 | request->alpha2[0] = alpha2[0]; | |
1664 | request->alpha2[1] = alpha2[1]; | |
7db90f4a | 1665 | request->initiator = NL80211_REGDOM_SET_BY_CORE; |
ba25c141 | 1666 | |
31e99729 | 1667 | queue_regulatory_request(request); |
5078b2e3 | 1668 | |
fe33eb39 | 1669 | return 0; |
ba25c141 LR |
1670 | } |
1671 | ||
fe33eb39 | 1672 | /* User hints */ |
57b5ce07 LR |
1673 | int regulatory_hint_user(const char *alpha2, |
1674 | enum nl80211_user_reg_hint_type user_reg_hint_type) | |
b2e1b302 | 1675 | { |
fe33eb39 LR |
1676 | struct regulatory_request *request; |
1677 | ||
fdc9d7b2 JB |
1678 | if (WARN_ON(!alpha2)) |
1679 | return -EINVAL; | |
b2e1b302 | 1680 | |
fe33eb39 LR |
1681 | request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); |
1682 | if (!request) | |
1683 | return -ENOMEM; | |
1684 | ||
f4173766 | 1685 | request->wiphy_idx = WIPHY_IDX_INVALID; |
fe33eb39 LR |
1686 | request->alpha2[0] = alpha2[0]; |
1687 | request->alpha2[1] = alpha2[1]; | |
e12822e1 | 1688 | request->initiator = NL80211_REGDOM_SET_BY_USER; |
57b5ce07 | 1689 | request->user_reg_hint_type = user_reg_hint_type; |
fe33eb39 LR |
1690 | |
1691 | queue_regulatory_request(request); | |
1692 | ||
1693 | return 0; | |
1694 | } | |
1695 | ||
1696 | /* Driver hints */ | |
1697 | int regulatory_hint(struct wiphy *wiphy, const char *alpha2) | |
1698 | { | |
1699 | struct regulatory_request *request; | |
1700 | ||
fdc9d7b2 JB |
1701 | if (WARN_ON(!alpha2 || !wiphy)) |
1702 | return -EINVAL; | |
fe33eb39 LR |
1703 | |
1704 | request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); | |
1705 | if (!request) | |
1706 | return -ENOMEM; | |
1707 | ||
1708 | request->wiphy_idx = get_wiphy_idx(wiphy); | |
1709 | ||
fe33eb39 LR |
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; |
c492db37 | 1729 | struct regulatory_request *request, *lr; |
3f2355cb | 1730 | |
abc7381b | 1731 | mutex_lock(®_mutex); |
c492db37 | 1732 | lr = get_last_request(); |
3f2355cb | 1733 | |
c492db37 | 1734 | if (unlikely(!lr)) |
9828b017 | 1735 | goto out; |
d335fe63 | 1736 | |
3f2355cb LR |
1737 | /* IE len must be evenly divisible by 2 */ |
1738 | if (country_ie_len & 0x01) | |
1739 | goto out; | |
1740 | ||
1741 | if (country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN) | |
1742 | goto out; | |
1743 | ||
3f2355cb LR |
1744 | alpha2[0] = country_ie[0]; |
1745 | alpha2[1] = country_ie[1]; | |
1746 | ||
1747 | if (country_ie[2] == 'I') | |
1748 | env = ENVIRON_INDOOR; | |
1749 | else if (country_ie[2] == 'O') | |
1750 | env = ENVIRON_OUTDOOR; | |
1751 | ||
fb1fc7ad | 1752 | /* |
8b19e6ca | 1753 | * We will run this only upon a successful connection on cfg80211. |
4b44c8bc LR |
1754 | * We leave conflict resolution to the workqueue, where can hold |
1755 | * cfg80211_mutex. | |
fb1fc7ad | 1756 | */ |
c492db37 JB |
1757 | if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE && |
1758 | lr->wiphy_idx != WIPHY_IDX_INVALID) | |
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 | ||
2d319867 | 1864 | reset_regdomains(true, &world_regdom); |
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 */ | |
379b82f4 JB |
1895 | world_alpha2[0] = cfg80211_world_regdom->alpha2[0]; |
1896 | world_alpha2[1] = cfg80211_world_regdom->alpha2[1]; | |
09d989d1 | 1897 | |
5ce543d1 RM |
1898 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) { |
1899 | if (rdev->wiphy.flags & WIPHY_FLAG_CUSTOM_REGULATORY) | |
1900 | restore_custom_reg_settings(&rdev->wiphy); | |
1901 | } | |
1902 | ||
cee0bec5 | 1903 | regulatory_hint_core(world_alpha2); |
09d989d1 LR |
1904 | |
1905 | /* | |
1906 | * This restores the ieee80211_regdom module parameter | |
1907 | * preference or the last user requested regulatory | |
1908 | * settings, user regulatory settings takes precedence. | |
1909 | */ | |
1910 | if (is_an_alpha2(alpha2)) | |
57b5ce07 | 1911 | regulatory_hint_user(user_alpha2, NL80211_USER_REG_HINT_USER); |
09d989d1 | 1912 | |
14609555 | 1913 | spin_lock(®_requests_lock); |
11cff96c | 1914 | list_splice_tail_init(&tmp_reg_req_list, ®_requests_list); |
14609555 LR |
1915 | spin_unlock(®_requests_lock); |
1916 | ||
1917 | mutex_unlock(®_mutex); | |
1918 | mutex_unlock(&cfg80211_mutex); | |
1919 | ||
1920 | REG_DBG_PRINT("Kicking the queue\n"); | |
1921 | ||
1922 | schedule_work(®_work); | |
1923 | } | |
09d989d1 LR |
1924 | |
1925 | void regulatory_hint_disconnect(void) | |
1926 | { | |
1a919318 | 1927 | REG_DBG_PRINT("All devices are disconnected, going to restore regulatory settings\n"); |
09d989d1 LR |
1928 | restore_regulatory_settings(false); |
1929 | } | |
1930 | ||
e38f8a7a LR |
1931 | static bool freq_is_chan_12_13_14(u16 freq) |
1932 | { | |
59eb21a6 BR |
1933 | if (freq == ieee80211_channel_to_frequency(12, IEEE80211_BAND_2GHZ) || |
1934 | freq == ieee80211_channel_to_frequency(13, IEEE80211_BAND_2GHZ) || | |
1935 | freq == ieee80211_channel_to_frequency(14, IEEE80211_BAND_2GHZ)) | |
e38f8a7a LR |
1936 | return true; |
1937 | return false; | |
1938 | } | |
1939 | ||
3ebfa6e7 LR |
1940 | static bool pending_reg_beacon(struct ieee80211_channel *beacon_chan) |
1941 | { | |
1942 | struct reg_beacon *pending_beacon; | |
1943 | ||
1944 | list_for_each_entry(pending_beacon, ®_pending_beacons, list) | |
1945 | if (beacon_chan->center_freq == | |
1946 | pending_beacon->chan.center_freq) | |
1947 | return true; | |
1948 | return false; | |
1949 | } | |
1950 | ||
e38f8a7a LR |
1951 | int regulatory_hint_found_beacon(struct wiphy *wiphy, |
1952 | struct ieee80211_channel *beacon_chan, | |
1953 | gfp_t gfp) | |
1954 | { | |
1955 | struct reg_beacon *reg_beacon; | |
3ebfa6e7 | 1956 | bool processing; |
e38f8a7a | 1957 | |
1a919318 JB |
1958 | if (beacon_chan->beacon_found || |
1959 | beacon_chan->flags & IEEE80211_CHAN_RADAR || | |
e38f8a7a | 1960 | (beacon_chan->band == IEEE80211_BAND_2GHZ && |
1a919318 | 1961 | !freq_is_chan_12_13_14(beacon_chan->center_freq))) |
e38f8a7a LR |
1962 | return 0; |
1963 | ||
3ebfa6e7 LR |
1964 | spin_lock_bh(®_pending_beacons_lock); |
1965 | processing = pending_reg_beacon(beacon_chan); | |
1966 | spin_unlock_bh(®_pending_beacons_lock); | |
1967 | ||
1968 | if (processing) | |
e38f8a7a LR |
1969 | return 0; |
1970 | ||
1971 | reg_beacon = kzalloc(sizeof(struct reg_beacon), gfp); | |
1972 | if (!reg_beacon) | |
1973 | return -ENOMEM; | |
1974 | ||
1a919318 | 1975 | REG_DBG_PRINT("Found new beacon on frequency: %d MHz (Ch %d) on %s\n", |
4113f751 LR |
1976 | beacon_chan->center_freq, |
1977 | ieee80211_frequency_to_channel(beacon_chan->center_freq), | |
1978 | wiphy_name(wiphy)); | |
1979 | ||
e38f8a7a | 1980 | memcpy(®_beacon->chan, beacon_chan, |
1a919318 | 1981 | sizeof(struct ieee80211_channel)); |
e38f8a7a LR |
1982 | |
1983 | /* | |
1984 | * Since we can be called from BH or and non-BH context | |
1985 | * we must use spin_lock_bh() | |
1986 | */ | |
1987 | spin_lock_bh(®_pending_beacons_lock); | |
1988 | list_add_tail(®_beacon->list, ®_pending_beacons); | |
1989 | spin_unlock_bh(®_pending_beacons_lock); | |
1990 | ||
1991 | schedule_work(®_work); | |
1992 | ||
1993 | return 0; | |
1994 | } | |
1995 | ||
a3d2eaf0 | 1996 | static void print_rd_rules(const struct ieee80211_regdomain *rd) |
b2e1b302 LR |
1997 | { |
1998 | unsigned int i; | |
a3d2eaf0 JB |
1999 | const struct ieee80211_reg_rule *reg_rule = NULL; |
2000 | const struct ieee80211_freq_range *freq_range = NULL; | |
2001 | const struct ieee80211_power_rule *power_rule = NULL; | |
b2e1b302 | 2002 | |
6653325a | 2003 | pr_info(" (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)\n"); |
b2e1b302 LR |
2004 | |
2005 | for (i = 0; i < rd->n_reg_rules; i++) { | |
2006 | reg_rule = &rd->reg_rules[i]; | |
2007 | freq_range = ®_rule->freq_range; | |
2008 | power_rule = ®_rule->power_rule; | |
2009 | ||
fb1fc7ad LR |
2010 | /* |
2011 | * There may not be documentation for max antenna gain | |
2012 | * in certain regions | |
2013 | */ | |
b2e1b302 | 2014 | if (power_rule->max_antenna_gain) |
6653325a | 2015 | pr_info(" (%d KHz - %d KHz @ %d KHz), (%d mBi, %d mBm)\n", |
b2e1b302 LR |
2016 | freq_range->start_freq_khz, |
2017 | freq_range->end_freq_khz, | |
2018 | freq_range->max_bandwidth_khz, | |
2019 | power_rule->max_antenna_gain, | |
2020 | power_rule->max_eirp); | |
2021 | else | |
6653325a | 2022 | pr_info(" (%d KHz - %d KHz @ %d KHz), (N/A, %d mBm)\n", |
b2e1b302 LR |
2023 | freq_range->start_freq_khz, |
2024 | freq_range->end_freq_khz, | |
2025 | freq_range->max_bandwidth_khz, | |
2026 | power_rule->max_eirp); | |
2027 | } | |
2028 | } | |
2029 | ||
8b60b078 LR |
2030 | bool reg_supported_dfs_region(u8 dfs_region) |
2031 | { | |
2032 | switch (dfs_region) { | |
2033 | case NL80211_DFS_UNSET: | |
2034 | case NL80211_DFS_FCC: | |
2035 | case NL80211_DFS_ETSI: | |
2036 | case NL80211_DFS_JP: | |
2037 | return true; | |
2038 | default: | |
2039 | REG_DBG_PRINT("Ignoring uknown DFS master region: %d\n", | |
2040 | dfs_region); | |
2041 | return false; | |
2042 | } | |
2043 | } | |
2044 | ||
2045 | static void print_dfs_region(u8 dfs_region) | |
2046 | { | |
2047 | if (!dfs_region) | |
2048 | return; | |
2049 | ||
2050 | switch (dfs_region) { | |
2051 | case NL80211_DFS_FCC: | |
2052 | pr_info(" DFS Master region FCC"); | |
2053 | break; | |
2054 | case NL80211_DFS_ETSI: | |
2055 | pr_info(" DFS Master region ETSI"); | |
2056 | break; | |
2057 | case NL80211_DFS_JP: | |
2058 | pr_info(" DFS Master region JP"); | |
2059 | break; | |
2060 | default: | |
1a919318 | 2061 | pr_info(" DFS Master region Unknown"); |
8b60b078 LR |
2062 | break; |
2063 | } | |
2064 | } | |
2065 | ||
a3d2eaf0 | 2066 | static void print_regdomain(const struct ieee80211_regdomain *rd) |
b2e1b302 | 2067 | { |
c492db37 | 2068 | struct regulatory_request *lr = get_last_request(); |
b2e1b302 | 2069 | |
3f2355cb | 2070 | if (is_intersected_alpha2(rd->alpha2)) { |
c492db37 | 2071 | if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) { |
79c97e97 | 2072 | struct cfg80211_registered_device *rdev; |
c492db37 | 2073 | rdev = cfg80211_rdev_by_wiphy_idx(lr->wiphy_idx); |
79c97e97 | 2074 | if (rdev) { |
e9c0268f | 2075 | pr_info("Current regulatory domain updated by AP to: %c%c\n", |
79c97e97 JB |
2076 | rdev->country_ie_alpha2[0], |
2077 | rdev->country_ie_alpha2[1]); | |
3f2355cb | 2078 | } else |
e9c0268f | 2079 | pr_info("Current regulatory domain intersected:\n"); |
3f2355cb | 2080 | } else |
e9c0268f | 2081 | pr_info("Current regulatory domain intersected:\n"); |
1a919318 | 2082 | } else if (is_world_regdom(rd->alpha2)) { |
e9c0268f | 2083 | pr_info("World regulatory domain updated:\n"); |
1a919318 | 2084 | } else { |
b2e1b302 | 2085 | if (is_unknown_alpha2(rd->alpha2)) |
e9c0268f | 2086 | pr_info("Regulatory domain changed to driver built-in settings (unknown country)\n"); |
57b5ce07 | 2087 | else { |
c492db37 | 2088 | if (reg_request_cell_base(lr)) |
1a919318 | 2089 | pr_info("Regulatory domain changed to country: %c%c by Cell Station\n", |
57b5ce07 LR |
2090 | rd->alpha2[0], rd->alpha2[1]); |
2091 | else | |
1a919318 | 2092 | pr_info("Regulatory domain changed to country: %c%c\n", |
57b5ce07 LR |
2093 | rd->alpha2[0], rd->alpha2[1]); |
2094 | } | |
b2e1b302 | 2095 | } |
1a919318 | 2096 | |
8b60b078 | 2097 | print_dfs_region(rd->dfs_region); |
b2e1b302 LR |
2098 | print_rd_rules(rd); |
2099 | } | |
2100 | ||
2df78167 | 2101 | static void print_regdomain_info(const struct ieee80211_regdomain *rd) |
b2e1b302 | 2102 | { |
e9c0268f | 2103 | pr_info("Regulatory domain: %c%c\n", rd->alpha2[0], rd->alpha2[1]); |
b2e1b302 LR |
2104 | print_rd_rules(rd); |
2105 | } | |
2106 | ||
d2372b31 | 2107 | /* Takes ownership of rd only if it doesn't fail */ |
a3d2eaf0 | 2108 | static int __set_regdom(const struct ieee80211_regdomain *rd) |
b2e1b302 | 2109 | { |
e9763c3c | 2110 | const struct ieee80211_regdomain *regd; |
9c96477d | 2111 | const struct ieee80211_regdomain *intersected_rd = NULL; |
806a9e39 | 2112 | struct wiphy *request_wiphy; |
c492db37 | 2113 | struct regulatory_request *lr = get_last_request(); |
6913b49a | 2114 | |
b2e1b302 LR |
2115 | /* Some basic sanity checks first */ |
2116 | ||
6913b49a JB |
2117 | if (!reg_is_valid_request(rd->alpha2)) |
2118 | return -EINVAL; | |
2119 | ||
b2e1b302 | 2120 | if (is_world_regdom(rd->alpha2)) { |
b2e1b302 LR |
2121 | update_world_regdomain(rd); |
2122 | return 0; | |
2123 | } | |
b2e1b302 LR |
2124 | |
2125 | if (!is_alpha2_set(rd->alpha2) && !is_an_alpha2(rd->alpha2) && | |
1a919318 | 2126 | !is_unknown_alpha2(rd->alpha2)) |
b2e1b302 LR |
2127 | return -EINVAL; |
2128 | ||
fb1fc7ad LR |
2129 | /* |
2130 | * Lets only bother proceeding on the same alpha2 if the current | |
3f2355cb | 2131 | * rd is non static (it means CRDA was present and was used last) |
fb1fc7ad LR |
2132 | * and the pending request came in from a country IE |
2133 | */ | |
c492db37 | 2134 | if (lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE) { |
fb1fc7ad LR |
2135 | /* |
2136 | * If someone else asked us to change the rd lets only bother | |
2137 | * checking if the alpha2 changes if CRDA was already called | |
2138 | */ | |
baeb66fe | 2139 | if (!regdom_changes(rd->alpha2)) |
95908535 | 2140 | return -EALREADY; |
3f2355cb LR |
2141 | } |
2142 | ||
fb1fc7ad LR |
2143 | /* |
2144 | * Now lets set the regulatory domain, update all driver channels | |
b2e1b302 LR |
2145 | * and finally inform them of what we have done, in case they want |
2146 | * to review or adjust their own settings based on their own | |
fb1fc7ad LR |
2147 | * internal EEPROM data |
2148 | */ | |
b2e1b302 | 2149 | |
8375af3b | 2150 | if (!is_valid_rd(rd)) { |
e9c0268f | 2151 | pr_err("Invalid regulatory domain detected:\n"); |
8375af3b LR |
2152 | print_regdomain_info(rd); |
2153 | return -EINVAL; | |
b2e1b302 LR |
2154 | } |
2155 | ||
c492db37 | 2156 | request_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx); |
0bac71af | 2157 | if (!request_wiphy && |
c492db37 JB |
2158 | (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER || |
2159 | lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE)) { | |
0bac71af | 2160 | schedule_delayed_work(®_timeout, 0); |
de3584bd JB |
2161 | return -ENODEV; |
2162 | } | |
806a9e39 | 2163 | |
c492db37 JB |
2164 | if (!lr->intersect) { |
2165 | if (lr->initiator != NL80211_REGDOM_SET_BY_DRIVER) { | |
379b82f4 | 2166 | reset_regdomains(false, rd); |
3e0c3ff3 LR |
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 | |
458f4f9e | 2186 | rcu_assign_pointer(request_wiphy->regd, regd); |
379b82f4 | 2187 | reset_regdomains(false, rd); |
b8295acd LR |
2188 | return 0; |
2189 | } | |
2190 | ||
2191 | /* Intersection requires a bit more work */ | |
2192 | ||
c492db37 | 2193 | if (lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE) { |
458f4f9e | 2194 | intersected_rd = regdom_intersect(rd, get_cfg80211_regdom()); |
9c96477d LR |
2195 | if (!intersected_rd) |
2196 | return -EINVAL; | |
b8295acd | 2197 | |
fb1fc7ad LR |
2198 | /* |
2199 | * We can trash what CRDA provided now. | |
3e0c3ff3 | 2200 | * However if a driver requested this specific regulatory |
fb1fc7ad LR |
2201 | * domain we keep it for its private use |
2202 | */ | |
b7566fc3 LF |
2203 | if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER) { |
2204 | const struct ieee80211_regdomain *tmp; | |
2205 | ||
2206 | tmp = get_wiphy_regdom(request_wiphy); | |
458f4f9e | 2207 | rcu_assign_pointer(request_wiphy->regd, rd); |
b7566fc3 LF |
2208 | rcu_free_regdom(tmp); |
2209 | } else { | |
3e0c3ff3 | 2210 | kfree(rd); |
b7566fc3 | 2211 | } |
3e0c3ff3 | 2212 | |
b8295acd LR |
2213 | rd = NULL; |
2214 | ||
379b82f4 | 2215 | reset_regdomains(false, intersected_rd); |
b8295acd LR |
2216 | |
2217 | return 0; | |
9c96477d LR |
2218 | } |
2219 | ||
f3baed51 | 2220 | return -EINVAL; |
b2e1b302 LR |
2221 | } |
2222 | ||
2223 | ||
fb1fc7ad LR |
2224 | /* |
2225 | * Use this call to set the current regulatory domain. Conflicts with | |
b2e1b302 | 2226 | * multiple drivers can be ironed out later. Caller must've already |
458f4f9e | 2227 | * kmalloc'd the rd structure. |
fb1fc7ad | 2228 | */ |
a3d2eaf0 | 2229 | int set_regdom(const struct ieee80211_regdomain *rd) |
b2e1b302 | 2230 | { |
c492db37 | 2231 | struct regulatory_request *lr; |
b2e1b302 LR |
2232 | int r; |
2233 | ||
abc7381b | 2234 | mutex_lock(®_mutex); |
c492db37 | 2235 | lr = get_last_request(); |
abc7381b | 2236 | |
b2e1b302 LR |
2237 | /* Note that this doesn't update the wiphys, this is done below */ |
2238 | r = __set_regdom(rd); | |
d2372b31 | 2239 | if (r) { |
95908535 KV |
2240 | if (r == -EALREADY) |
2241 | reg_set_request_processed(); | |
2242 | ||
d2372b31 | 2243 | kfree(rd); |
fdc9d7b2 | 2244 | goto out; |
d2372b31 | 2245 | } |
b2e1b302 | 2246 | |
b2e1b302 | 2247 | /* This would make this whole thing pointless */ |
c492db37 | 2248 | if (WARN_ON(!lr->intersect && rd != get_cfg80211_regdom())) { |
fdc9d7b2 JB |
2249 | r = -EINVAL; |
2250 | goto out; | |
2251 | } | |
b2e1b302 LR |
2252 | |
2253 | /* update all wiphys now with the new established regulatory domain */ | |
c492db37 | 2254 | update_all_wiphy_regulatory(lr->initiator); |
b2e1b302 | 2255 | |
458f4f9e | 2256 | print_regdomain(get_cfg80211_regdom()); |
b2e1b302 | 2257 | |
c492db37 | 2258 | nl80211_send_reg_change_event(lr); |
73d54c9e | 2259 | |
b2e253cf LR |
2260 | reg_set_request_processed(); |
2261 | ||
fdc9d7b2 | 2262 | out: |
abc7381b LR |
2263 | mutex_unlock(®_mutex); |
2264 | ||
b2e1b302 LR |
2265 | return r; |
2266 | } | |
2267 | ||
4d9d88d1 SJR |
2268 | int reg_device_uevent(struct device *dev, struct kobj_uevent_env *env) |
2269 | { | |
4a484cff JB |
2270 | struct regulatory_request *lr; |
2271 | u8 alpha2[2]; | |
2272 | bool add = false; | |
c492db37 | 2273 | |
4a484cff JB |
2274 | rcu_read_lock(); |
2275 | lr = get_last_request(); | |
c492db37 | 2276 | if (lr && !lr->processed) { |
4a484cff JB |
2277 | memcpy(alpha2, lr->alpha2, 2); |
2278 | add = true; | |
4d9d88d1 | 2279 | } |
4a484cff | 2280 | rcu_read_unlock(); |
4d9d88d1 | 2281 | |
4a484cff JB |
2282 | if (add) |
2283 | return add_uevent_var(env, "COUNTRY=%c%c", | |
2284 | alpha2[0], alpha2[1]); | |
4d9d88d1 SJR |
2285 | return 0; |
2286 | } | |
4d9d88d1 | 2287 | |
57b5ce07 LR |
2288 | void wiphy_regulatory_register(struct wiphy *wiphy) |
2289 | { | |
57b5ce07 LR |
2290 | mutex_lock(®_mutex); |
2291 | ||
2292 | if (!reg_dev_ignore_cell_hint(wiphy)) | |
2293 | reg_num_devs_support_basehint++; | |
2294 | ||
14cdf112 | 2295 | wiphy_update_regulatory(wiphy, NL80211_REGDOM_SET_BY_CORE); |
f8a1c774 | 2296 | |
14cdf112 | 2297 | mutex_unlock(®_mutex); |
57b5ce07 LR |
2298 | } |
2299 | ||
a1794390 | 2300 | /* Caller must hold cfg80211_mutex */ |
bfead080 | 2301 | void wiphy_regulatory_deregister(struct wiphy *wiphy) |
3f2355cb | 2302 | { |
0ad8acaf | 2303 | struct wiphy *request_wiphy = NULL; |
c492db37 | 2304 | struct regulatory_request *lr; |
761cf7ec | 2305 | |
abc7381b | 2306 | mutex_lock(®_mutex); |
c492db37 | 2307 | lr = get_last_request(); |
abc7381b | 2308 | |
57b5ce07 LR |
2309 | if (!reg_dev_ignore_cell_hint(wiphy)) |
2310 | reg_num_devs_support_basehint--; | |
2311 | ||
458f4f9e JB |
2312 | rcu_free_regdom(get_wiphy_regdom(wiphy)); |
2313 | rcu_assign_pointer(wiphy->regd, NULL); | |
0ef9ccdd | 2314 | |
c492db37 JB |
2315 | if (lr) |
2316 | request_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx); | |
806a9e39 | 2317 | |
0ef9ccdd | 2318 | if (!request_wiphy || request_wiphy != wiphy) |
abc7381b | 2319 | goto out; |
0ef9ccdd | 2320 | |
c492db37 JB |
2321 | lr->wiphy_idx = WIPHY_IDX_INVALID; |
2322 | lr->country_ie_env = ENVIRON_ANY; | |
abc7381b LR |
2323 | out: |
2324 | mutex_unlock(®_mutex); | |
3f2355cb LR |
2325 | } |
2326 | ||
a90c7a31 LR |
2327 | static void reg_timeout_work(struct work_struct *work) |
2328 | { | |
1a919318 | 2329 | REG_DBG_PRINT("Timeout while waiting for CRDA to reply, restoring regulatory settings\n"); |
a90c7a31 LR |
2330 | restore_regulatory_settings(true); |
2331 | } | |
2332 | ||
2fcc9f73 | 2333 | int __init regulatory_init(void) |
b2e1b302 | 2334 | { |
bcf4f99b | 2335 | int err = 0; |
734366de | 2336 | |
b2e1b302 LR |
2337 | reg_pdev = platform_device_register_simple("regulatory", 0, NULL, 0); |
2338 | if (IS_ERR(reg_pdev)) | |
2339 | return PTR_ERR(reg_pdev); | |
734366de | 2340 | |
4d9d88d1 SJR |
2341 | reg_pdev->dev.type = ®_device_type; |
2342 | ||
fe33eb39 | 2343 | spin_lock_init(®_requests_lock); |
e38f8a7a | 2344 | spin_lock_init(®_pending_beacons_lock); |
fe33eb39 | 2345 | |
80007efe LR |
2346 | reg_regdb_size_check(); |
2347 | ||
458f4f9e | 2348 | rcu_assign_pointer(cfg80211_regdomain, cfg80211_world_regdom); |
734366de | 2349 | |
09d989d1 LR |
2350 | user_alpha2[0] = '9'; |
2351 | user_alpha2[1] = '7'; | |
2352 | ||
ae9e4b0d | 2353 | /* We always try to get an update for the static regdomain */ |
458f4f9e | 2354 | err = regulatory_hint_core(cfg80211_world_regdom->alpha2); |
ba25c141 | 2355 | if (err) { |
bcf4f99b LR |
2356 | if (err == -ENOMEM) |
2357 | return err; | |
2358 | /* | |
2359 | * N.B. kobject_uevent_env() can fail mainly for when we're out | |
2360 | * memory which is handled and propagated appropriately above | |
2361 | * but it can also fail during a netlink_broadcast() or during | |
2362 | * early boot for call_usermodehelper(). For now treat these | |
2363 | * errors as non-fatal. | |
2364 | */ | |
e9c0268f | 2365 | pr_err("kobject_uevent_env() was unable to call CRDA during init\n"); |
bcf4f99b | 2366 | } |
734366de | 2367 | |
ae9e4b0d LR |
2368 | /* |
2369 | * Finally, if the user set the module parameter treat it | |
2370 | * as a user hint. | |
2371 | */ | |
2372 | if (!is_world_regdom(ieee80211_regdom)) | |
57b5ce07 LR |
2373 | regulatory_hint_user(ieee80211_regdom, |
2374 | NL80211_USER_REG_HINT_USER); | |
ae9e4b0d | 2375 | |
b2e1b302 LR |
2376 | return 0; |
2377 | } | |
2378 | ||
1a919318 | 2379 | void regulatory_exit(void) |
b2e1b302 | 2380 | { |
fe33eb39 | 2381 | struct regulatory_request *reg_request, *tmp; |
e38f8a7a | 2382 | struct reg_beacon *reg_beacon, *btmp; |
fe33eb39 LR |
2383 | |
2384 | cancel_work_sync(®_work); | |
a90c7a31 | 2385 | cancel_delayed_work_sync(®_timeout); |
fe33eb39 | 2386 | |
9027b149 | 2387 | /* Lock to suppress warnings */ |
abc7381b | 2388 | mutex_lock(®_mutex); |
379b82f4 | 2389 | reset_regdomains(true, NULL); |
9027b149 | 2390 | mutex_unlock(®_mutex); |
734366de | 2391 | |
58ebacc6 | 2392 | dev_set_uevent_suppress(®_pdev->dev, true); |
f6037d09 | 2393 | |
b2e1b302 | 2394 | platform_device_unregister(reg_pdev); |
734366de | 2395 | |
fea9bced JB |
2396 | list_for_each_entry_safe(reg_beacon, btmp, ®_pending_beacons, list) { |
2397 | list_del(®_beacon->list); | |
2398 | kfree(reg_beacon); | |
e38f8a7a | 2399 | } |
e38f8a7a | 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 | ||
fea9bced JB |
2406 | list_for_each_entry_safe(reg_request, tmp, ®_requests_list, list) { |
2407 | list_del(®_request->list); | |
2408 | kfree(reg_request); | |
fe33eb39 | 2409 | } |
8318d78a | 2410 | } |