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); | |
e8da2bb4 | 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(); |
6913b49a | 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); |
806a9e39 | 838 | |
a92a3ce7 | 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; | |
b2e1b302 | 869 | |
c492db37 | 870 | if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER && |
806a9e39 | 871 | request_wiphy && request_wiphy == wiphy && |
5be83de5 | 872 | request_wiphy->flags & WIPHY_FLAG_STRICT_REGULATORY) { |
fb1fc7ad | 873 | /* |
25985edc | 874 | * This guarantees the driver's requested regulatory domain |
f976376d | 875 | * will always be used as a base for further regulatory |
fb1fc7ad LR |
876 | * settings |
877 | */ | |
f976376d | 878 | chan->flags = chan->orig_flags = |
038659e7 | 879 | map_regdom_flags(reg_rule->flags) | bw_flags; |
f976376d LR |
880 | chan->max_antenna_gain = chan->orig_mag = |
881 | (int) MBI_TO_DBI(power_rule->max_antenna_gain); | |
279f0f55 | 882 | chan->max_reg_power = chan->max_power = chan->orig_mpwr = |
f976376d LR |
883 | (int) MBM_TO_DBM(power_rule->max_eirp); |
884 | return; | |
885 | } | |
886 | ||
04f39047 SW |
887 | chan->dfs_state = NL80211_DFS_USABLE; |
888 | chan->dfs_state_entered = jiffies; | |
889 | ||
aa3d7eef | 890 | chan->beacon_found = false; |
038659e7 | 891 | chan->flags = flags | bw_flags | map_regdom_flags(reg_rule->flags); |
1a919318 JB |
892 | chan->max_antenna_gain = |
893 | min_t(int, chan->orig_mag, | |
894 | MBI_TO_DBI(power_rule->max_antenna_gain)); | |
eccc068e | 895 | chan->max_reg_power = (int) MBM_TO_DBM(power_rule->max_eirp); |
5e31fc08 SG |
896 | if (chan->orig_mpwr) { |
897 | /* | |
898 | * Devices that have their own custom regulatory domain | |
899 | * but also use WIPHY_FLAG_STRICT_REGULATORY will follow the | |
900 | * passed country IE power settings. | |
901 | */ | |
902 | if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE && | |
903 | wiphy->flags & WIPHY_FLAG_CUSTOM_REGULATORY && | |
904 | wiphy->flags & WIPHY_FLAG_STRICT_REGULATORY) | |
905 | chan->max_power = chan->max_reg_power; | |
906 | else | |
907 | chan->max_power = min(chan->orig_mpwr, | |
908 | chan->max_reg_power); | |
909 | } else | |
910 | chan->max_power = chan->max_reg_power; | |
8318d78a JB |
911 | } |
912 | ||
fdc9d7b2 JB |
913 | static void handle_band(struct wiphy *wiphy, |
914 | enum nl80211_reg_initiator initiator, | |
915 | struct ieee80211_supported_band *sband) | |
8318d78a | 916 | { |
a92a3ce7 | 917 | unsigned int i; |
a92a3ce7 | 918 | |
fdc9d7b2 JB |
919 | if (!sband) |
920 | return; | |
8318d78a JB |
921 | |
922 | for (i = 0; i < sband->n_channels; i++) | |
fdc9d7b2 | 923 | handle_channel(wiphy, initiator, &sband->channels[i]); |
8318d78a JB |
924 | } |
925 | ||
57b5ce07 LR |
926 | static bool reg_request_cell_base(struct regulatory_request *request) |
927 | { | |
928 | if (request->initiator != NL80211_REGDOM_SET_BY_USER) | |
929 | return false; | |
1a919318 | 930 | return request->user_reg_hint_type == NL80211_USER_REG_HINT_CELL_BASE; |
57b5ce07 LR |
931 | } |
932 | ||
933 | bool reg_last_request_cell_base(void) | |
934 | { | |
ebd0fd2b | 935 | bool val; |
1a919318 | 936 | |
57b5ce07 | 937 | mutex_lock(®_mutex); |
c492db37 | 938 | val = reg_request_cell_base(get_last_request()); |
57b5ce07 | 939 | mutex_unlock(®_mutex); |
1a919318 | 940 | |
ebd0fd2b | 941 | return val; |
57b5ce07 LR |
942 | } |
943 | ||
944 | #ifdef CONFIG_CFG80211_CERTIFICATION_ONUS | |
57b5ce07 | 945 | /* Core specific check */ |
2f92212b JB |
946 | static enum reg_request_treatment |
947 | reg_ignore_cell_hint(struct regulatory_request *pending_request) | |
57b5ce07 | 948 | { |
c492db37 JB |
949 | struct regulatory_request *lr = get_last_request(); |
950 | ||
57b5ce07 | 951 | if (!reg_num_devs_support_basehint) |
2f92212b | 952 | return REG_REQ_IGNORE; |
57b5ce07 | 953 | |
c492db37 | 954 | if (reg_request_cell_base(lr) && |
1a919318 | 955 | !regdom_changes(pending_request->alpha2)) |
2f92212b | 956 | return REG_REQ_ALREADY_SET; |
1a919318 | 957 | |
2f92212b | 958 | return REG_REQ_OK; |
57b5ce07 LR |
959 | } |
960 | ||
961 | /* Device specific check */ | |
962 | static bool reg_dev_ignore_cell_hint(struct wiphy *wiphy) | |
963 | { | |
1a919318 | 964 | return !(wiphy->features & NL80211_FEATURE_CELL_BASE_REG_HINTS); |
57b5ce07 LR |
965 | } |
966 | #else | |
967 | static int reg_ignore_cell_hint(struct regulatory_request *pending_request) | |
968 | { | |
2f92212b | 969 | return REG_REQ_IGNORE; |
57b5ce07 | 970 | } |
1a919318 JB |
971 | |
972 | static bool reg_dev_ignore_cell_hint(struct wiphy *wiphy) | |
57b5ce07 LR |
973 | { |
974 | return true; | |
975 | } | |
976 | #endif | |
977 | ||
978 | ||
7db90f4a LR |
979 | static bool ignore_reg_update(struct wiphy *wiphy, |
980 | enum nl80211_reg_initiator initiator) | |
14b9815a | 981 | { |
c492db37 JB |
982 | struct regulatory_request *lr = get_last_request(); |
983 | ||
984 | if (!lr) { | |
1a919318 | 985 | REG_DBG_PRINT("Ignoring regulatory request %s since last_request is not set\n", |
926a0a09 | 986 | reg_initiator_name(initiator)); |
14b9815a | 987 | return true; |
926a0a09 LR |
988 | } |
989 | ||
7db90f4a | 990 | if (initiator == NL80211_REGDOM_SET_BY_CORE && |
926a0a09 | 991 | wiphy->flags & WIPHY_FLAG_CUSTOM_REGULATORY) { |
1a919318 | 992 | REG_DBG_PRINT("Ignoring regulatory request %s since the driver uses its own custom regulatory domain\n", |
926a0a09 | 993 | reg_initiator_name(initiator)); |
14b9815a | 994 | return true; |
926a0a09 LR |
995 | } |
996 | ||
fb1fc7ad LR |
997 | /* |
998 | * wiphy->regd will be set once the device has its own | |
999 | * desired regulatory domain set | |
1000 | */ | |
5be83de5 | 1001 | if (wiphy->flags & WIPHY_FLAG_STRICT_REGULATORY && !wiphy->regd && |
749b527b | 1002 | initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && |
c492db37 | 1003 | !is_world_regdom(lr->alpha2)) { |
1a919318 | 1004 | REG_DBG_PRINT("Ignoring regulatory request %s since the driver requires its own regulatory domain to be set first\n", |
926a0a09 | 1005 | reg_initiator_name(initiator)); |
14b9815a | 1006 | return true; |
926a0a09 LR |
1007 | } |
1008 | ||
c492db37 | 1009 | if (reg_request_cell_base(lr)) |
57b5ce07 LR |
1010 | return reg_dev_ignore_cell_hint(wiphy); |
1011 | ||
14b9815a LR |
1012 | return false; |
1013 | } | |
1014 | ||
3195e489 LR |
1015 | static bool reg_is_world_roaming(struct wiphy *wiphy) |
1016 | { | |
1017 | const struct ieee80211_regdomain *cr = get_cfg80211_regdom(); | |
1018 | const struct ieee80211_regdomain *wr = get_wiphy_regdom(wiphy); | |
1019 | struct regulatory_request *lr = get_last_request(); | |
1020 | ||
1021 | if (is_world_regdom(cr->alpha2) || (wr && is_world_regdom(wr->alpha2))) | |
1022 | return true; | |
1023 | ||
1024 | if (lr && lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && | |
1025 | wiphy->flags & WIPHY_FLAG_CUSTOM_REGULATORY) | |
1026 | return true; | |
1027 | ||
1028 | return false; | |
1029 | } | |
1030 | ||
1a919318 | 1031 | static void handle_reg_beacon(struct wiphy *wiphy, unsigned int chan_idx, |
e38f8a7a LR |
1032 | struct reg_beacon *reg_beacon) |
1033 | { | |
e38f8a7a LR |
1034 | struct ieee80211_supported_band *sband; |
1035 | struct ieee80211_channel *chan; | |
6bad8766 LR |
1036 | bool channel_changed = false; |
1037 | struct ieee80211_channel chan_before; | |
e38f8a7a | 1038 | |
e38f8a7a LR |
1039 | sband = wiphy->bands[reg_beacon->chan.band]; |
1040 | chan = &sband->channels[chan_idx]; | |
1041 | ||
1042 | if (likely(chan->center_freq != reg_beacon->chan.center_freq)) | |
1043 | return; | |
1044 | ||
6bad8766 LR |
1045 | if (chan->beacon_found) |
1046 | return; | |
1047 | ||
1048 | chan->beacon_found = true; | |
1049 | ||
0f500a5f LR |
1050 | if (!reg_is_world_roaming(wiphy)) |
1051 | return; | |
1052 | ||
5be83de5 | 1053 | if (wiphy->flags & WIPHY_FLAG_DISABLE_BEACON_HINTS) |
37184244 LR |
1054 | return; |
1055 | ||
6bad8766 LR |
1056 | chan_before.center_freq = chan->center_freq; |
1057 | chan_before.flags = chan->flags; | |
1058 | ||
37184244 | 1059 | if (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN) { |
e38f8a7a | 1060 | chan->flags &= ~IEEE80211_CHAN_PASSIVE_SCAN; |
6bad8766 | 1061 | channel_changed = true; |
e38f8a7a LR |
1062 | } |
1063 | ||
37184244 | 1064 | if (chan->flags & IEEE80211_CHAN_NO_IBSS) { |
e38f8a7a | 1065 | chan->flags &= ~IEEE80211_CHAN_NO_IBSS; |
6bad8766 | 1066 | channel_changed = true; |
e38f8a7a LR |
1067 | } |
1068 | ||
6bad8766 LR |
1069 | if (channel_changed) |
1070 | nl80211_send_beacon_hint_event(wiphy, &chan_before, chan); | |
e38f8a7a LR |
1071 | } |
1072 | ||
1073 | /* | |
1074 | * Called when a scan on a wiphy finds a beacon on | |
1075 | * new channel | |
1076 | */ | |
1077 | static void wiphy_update_new_beacon(struct wiphy *wiphy, | |
1078 | struct reg_beacon *reg_beacon) | |
1079 | { | |
1080 | unsigned int i; | |
1081 | struct ieee80211_supported_band *sband; | |
1082 | ||
e38f8a7a LR |
1083 | if (!wiphy->bands[reg_beacon->chan.band]) |
1084 | return; | |
1085 | ||
1086 | sband = wiphy->bands[reg_beacon->chan.band]; | |
1087 | ||
1088 | for (i = 0; i < sband->n_channels; i++) | |
1089 | handle_reg_beacon(wiphy, i, reg_beacon); | |
1090 | } | |
1091 | ||
1092 | /* | |
1093 | * Called upon reg changes or a new wiphy is added | |
1094 | */ | |
1095 | static void wiphy_update_beacon_reg(struct wiphy *wiphy) | |
1096 | { | |
1097 | unsigned int i; | |
1098 | struct ieee80211_supported_band *sband; | |
1099 | struct reg_beacon *reg_beacon; | |
1100 | ||
e38f8a7a LR |
1101 | list_for_each_entry(reg_beacon, ®_beacon_list, list) { |
1102 | if (!wiphy->bands[reg_beacon->chan.band]) | |
1103 | continue; | |
1104 | sband = wiphy->bands[reg_beacon->chan.band]; | |
1105 | for (i = 0; i < sband->n_channels; i++) | |
1106 | handle_reg_beacon(wiphy, i, reg_beacon); | |
1107 | } | |
1108 | } | |
1109 | ||
e38f8a7a LR |
1110 | /* Reap the advantages of previously found beacons */ |
1111 | static void reg_process_beacons(struct wiphy *wiphy) | |
1112 | { | |
b1ed8ddd LR |
1113 | /* |
1114 | * Means we are just firing up cfg80211, so no beacons would | |
1115 | * have been processed yet. | |
1116 | */ | |
1117 | if (!last_request) | |
1118 | return; | |
e38f8a7a LR |
1119 | wiphy_update_beacon_reg(wiphy); |
1120 | } | |
1121 | ||
1a919318 | 1122 | static bool is_ht40_allowed(struct ieee80211_channel *chan) |
038659e7 LR |
1123 | { |
1124 | if (!chan) | |
1a919318 | 1125 | return false; |
038659e7 | 1126 | if (chan->flags & IEEE80211_CHAN_DISABLED) |
1a919318 | 1127 | return false; |
038659e7 | 1128 | /* This would happen when regulatory rules disallow HT40 completely */ |
55b183ad FF |
1129 | if ((chan->flags & IEEE80211_CHAN_NO_HT40) == IEEE80211_CHAN_NO_HT40) |
1130 | return false; | |
1131 | return true; | |
038659e7 LR |
1132 | } |
1133 | ||
1134 | static void reg_process_ht_flags_channel(struct wiphy *wiphy, | |
fdc9d7b2 | 1135 | struct ieee80211_channel *channel) |
038659e7 | 1136 | { |
fdc9d7b2 | 1137 | struct ieee80211_supported_band *sband = wiphy->bands[channel->band]; |
038659e7 LR |
1138 | struct ieee80211_channel *channel_before = NULL, *channel_after = NULL; |
1139 | unsigned int i; | |
1140 | ||
1a919318 | 1141 | if (!is_ht40_allowed(channel)) { |
038659e7 LR |
1142 | channel->flags |= IEEE80211_CHAN_NO_HT40; |
1143 | return; | |
1144 | } | |
1145 | ||
1146 | /* | |
1147 | * We need to ensure the extension channels exist to | |
1148 | * be able to use HT40- or HT40+, this finds them (or not) | |
1149 | */ | |
1150 | for (i = 0; i < sband->n_channels; i++) { | |
1151 | struct ieee80211_channel *c = &sband->channels[i]; | |
1a919318 | 1152 | |
038659e7 LR |
1153 | if (c->center_freq == (channel->center_freq - 20)) |
1154 | channel_before = c; | |
1155 | if (c->center_freq == (channel->center_freq + 20)) | |
1156 | channel_after = c; | |
1157 | } | |
1158 | ||
1159 | /* | |
1160 | * Please note that this assumes target bandwidth is 20 MHz, | |
1161 | * if that ever changes we also need to change the below logic | |
1162 | * to include that as well. | |
1163 | */ | |
1a919318 | 1164 | if (!is_ht40_allowed(channel_before)) |
689da1b3 | 1165 | channel->flags |= IEEE80211_CHAN_NO_HT40MINUS; |
038659e7 | 1166 | else |
689da1b3 | 1167 | channel->flags &= ~IEEE80211_CHAN_NO_HT40MINUS; |
038659e7 | 1168 | |
1a919318 | 1169 | if (!is_ht40_allowed(channel_after)) |
689da1b3 | 1170 | channel->flags |= IEEE80211_CHAN_NO_HT40PLUS; |
038659e7 | 1171 | else |
689da1b3 | 1172 | channel->flags &= ~IEEE80211_CHAN_NO_HT40PLUS; |
038659e7 LR |
1173 | } |
1174 | ||
1175 | static void reg_process_ht_flags_band(struct wiphy *wiphy, | |
fdc9d7b2 | 1176 | struct ieee80211_supported_band *sband) |
038659e7 LR |
1177 | { |
1178 | unsigned int i; | |
038659e7 | 1179 | |
fdc9d7b2 JB |
1180 | if (!sband) |
1181 | return; | |
038659e7 LR |
1182 | |
1183 | for (i = 0; i < sband->n_channels; i++) | |
fdc9d7b2 | 1184 | reg_process_ht_flags_channel(wiphy, &sband->channels[i]); |
038659e7 LR |
1185 | } |
1186 | ||
1187 | static void reg_process_ht_flags(struct wiphy *wiphy) | |
1188 | { | |
1189 | enum ieee80211_band band; | |
1190 | ||
1191 | if (!wiphy) | |
1192 | return; | |
1193 | ||
fdc9d7b2 JB |
1194 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) |
1195 | reg_process_ht_flags_band(wiphy, wiphy->bands[band]); | |
038659e7 LR |
1196 | } |
1197 | ||
eac03e38 SN |
1198 | static void wiphy_update_regulatory(struct wiphy *wiphy, |
1199 | enum nl80211_reg_initiator initiator) | |
b2e1b302 LR |
1200 | { |
1201 | enum ieee80211_band band; | |
c492db37 | 1202 | struct regulatory_request *lr = get_last_request(); |
eac03e38 | 1203 | |
7db90f4a | 1204 | if (ignore_reg_update(wiphy, initiator)) |
a203c2aa SN |
1205 | return; |
1206 | ||
c492db37 | 1207 | lr->dfs_region = get_cfg80211_regdom()->dfs_region; |
b68e6b3b | 1208 | |
fdc9d7b2 JB |
1209 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) |
1210 | handle_band(wiphy, initiator, wiphy->bands[band]); | |
a203c2aa | 1211 | |
e38f8a7a | 1212 | reg_process_beacons(wiphy); |
038659e7 | 1213 | reg_process_ht_flags(wiphy); |
1a919318 | 1214 | |
560e28e1 | 1215 | if (wiphy->reg_notifier) |
c492db37 | 1216 | wiphy->reg_notifier(wiphy, lr); |
b2e1b302 LR |
1217 | } |
1218 | ||
d7549cbb SN |
1219 | static void update_all_wiphy_regulatory(enum nl80211_reg_initiator initiator) |
1220 | { | |
1221 | struct cfg80211_registered_device *rdev; | |
4a38994f | 1222 | struct wiphy *wiphy; |
d7549cbb | 1223 | |
458f4f9e JB |
1224 | assert_cfg80211_lock(); |
1225 | ||
4a38994f RM |
1226 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) { |
1227 | wiphy = &rdev->wiphy; | |
1228 | wiphy_update_regulatory(wiphy, initiator); | |
1229 | /* | |
1230 | * Regulatory updates set by CORE are ignored for custom | |
1231 | * regulatory cards. Let us notify the changes to the driver, | |
1232 | * as some drivers used this to restore its orig_* reg domain. | |
1233 | */ | |
1234 | if (initiator == NL80211_REGDOM_SET_BY_CORE && | |
1235 | wiphy->flags & WIPHY_FLAG_CUSTOM_REGULATORY && | |
1236 | wiphy->reg_notifier) | |
c492db37 | 1237 | wiphy->reg_notifier(wiphy, get_last_request()); |
4a38994f | 1238 | } |
d7549cbb SN |
1239 | } |
1240 | ||
1fa25e41 | 1241 | static void handle_channel_custom(struct wiphy *wiphy, |
fdc9d7b2 | 1242 | struct ieee80211_channel *chan, |
1fa25e41 LR |
1243 | const struct ieee80211_regdomain *regd) |
1244 | { | |
038659e7 | 1245 | u32 bw_flags = 0; |
1fa25e41 LR |
1246 | const struct ieee80211_reg_rule *reg_rule = NULL; |
1247 | const struct ieee80211_power_rule *power_rule = NULL; | |
038659e7 | 1248 | const struct ieee80211_freq_range *freq_range = NULL; |
1fa25e41 | 1249 | |
361c9c8b JB |
1250 | reg_rule = freq_reg_info_regd(wiphy, MHZ_TO_KHZ(chan->center_freq), |
1251 | regd); | |
1fa25e41 | 1252 | |
361c9c8b | 1253 | if (IS_ERR(reg_rule)) { |
fe7ef5e9 JB |
1254 | REG_DBG_PRINT("Disabling freq %d MHz as custom regd has no rule that fits it\n", |
1255 | chan->center_freq); | |
1fa25e41 LR |
1256 | chan->flags = IEEE80211_CHAN_DISABLED; |
1257 | return; | |
1258 | } | |
1259 | ||
fe7ef5e9 | 1260 | chan_reg_rule_print_dbg(chan, reg_rule); |
e702d3cf | 1261 | |
1fa25e41 | 1262 | power_rule = ®_rule->power_rule; |
038659e7 LR |
1263 | freq_range = ®_rule->freq_range; |
1264 | ||
1265 | if (freq_range->max_bandwidth_khz < MHZ_TO_KHZ(40)) | |
1266 | bw_flags = IEEE80211_CHAN_NO_HT40; | |
1fa25e41 | 1267 | |
038659e7 | 1268 | chan->flags |= map_regdom_flags(reg_rule->flags) | bw_flags; |
1fa25e41 | 1269 | chan->max_antenna_gain = (int) MBI_TO_DBI(power_rule->max_antenna_gain); |
279f0f55 FF |
1270 | chan->max_reg_power = chan->max_power = |
1271 | (int) MBM_TO_DBM(power_rule->max_eirp); | |
1fa25e41 LR |
1272 | } |
1273 | ||
fdc9d7b2 JB |
1274 | static void handle_band_custom(struct wiphy *wiphy, |
1275 | struct ieee80211_supported_band *sband, | |
1fa25e41 LR |
1276 | const struct ieee80211_regdomain *regd) |
1277 | { | |
1278 | unsigned int i; | |
1fa25e41 | 1279 | |
fdc9d7b2 JB |
1280 | if (!sband) |
1281 | return; | |
1fa25e41 LR |
1282 | |
1283 | for (i = 0; i < sband->n_channels; i++) | |
fdc9d7b2 | 1284 | handle_channel_custom(wiphy, &sband->channels[i], regd); |
1fa25e41 LR |
1285 | } |
1286 | ||
1287 | /* Used by drivers prior to wiphy registration */ | |
1288 | void wiphy_apply_custom_regulatory(struct wiphy *wiphy, | |
1289 | const struct ieee80211_regdomain *regd) | |
1290 | { | |
1291 | enum ieee80211_band band; | |
bbcf3f02 | 1292 | unsigned int bands_set = 0; |
ac46d48e | 1293 | |
1fa25e41 | 1294 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) { |
bbcf3f02 LR |
1295 | if (!wiphy->bands[band]) |
1296 | continue; | |
fdc9d7b2 | 1297 | handle_band_custom(wiphy, wiphy->bands[band], regd); |
bbcf3f02 | 1298 | bands_set++; |
b2e1b302 | 1299 | } |
bbcf3f02 LR |
1300 | |
1301 | /* | |
1302 | * no point in calling this if it won't have any effect | |
1a919318 | 1303 | * on your device's supported bands. |
bbcf3f02 LR |
1304 | */ |
1305 | WARN_ON(!bands_set); | |
b2e1b302 | 1306 | } |
1fa25e41 LR |
1307 | EXPORT_SYMBOL(wiphy_apply_custom_regulatory); |
1308 | ||
84fa4f43 JB |
1309 | /* This has the logic which determines when a new request |
1310 | * should be ignored. */ | |
2f92212b JB |
1311 | static enum reg_request_treatment |
1312 | get_reg_request_treatment(struct wiphy *wiphy, | |
2f92cd2e | 1313 | struct regulatory_request *pending_request) |
84fa4f43 | 1314 | { |
806a9e39 | 1315 | struct wiphy *last_wiphy = NULL; |
c492db37 | 1316 | struct regulatory_request *lr = get_last_request(); |
761cf7ec | 1317 | |
84fa4f43 | 1318 | /* All initial requests are respected */ |
c492db37 | 1319 | if (!lr) |
2f92212b | 1320 | return REG_REQ_OK; |
84fa4f43 | 1321 | |
2f92cd2e | 1322 | switch (pending_request->initiator) { |
7db90f4a | 1323 | case NL80211_REGDOM_SET_BY_CORE: |
2f92212b | 1324 | return REG_REQ_OK; |
7db90f4a | 1325 | case NL80211_REGDOM_SET_BY_COUNTRY_IE: |
c492db37 | 1326 | if (reg_request_cell_base(lr)) { |
57b5ce07 LR |
1327 | /* Trust a Cell base station over the AP's country IE */ |
1328 | if (regdom_changes(pending_request->alpha2)) | |
2f92212b JB |
1329 | return REG_REQ_IGNORE; |
1330 | return REG_REQ_ALREADY_SET; | |
57b5ce07 LR |
1331 | } |
1332 | ||
c492db37 | 1333 | last_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx); |
806a9e39 | 1334 | |
2f92cd2e | 1335 | if (unlikely(!is_an_alpha2(pending_request->alpha2))) |
84fa4f43 | 1336 | return -EINVAL; |
c492db37 | 1337 | if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) { |
806a9e39 | 1338 | if (last_wiphy != wiphy) { |
84fa4f43 JB |
1339 | /* |
1340 | * Two cards with two APs claiming different | |
1fe90b03 | 1341 | * Country IE alpha2s. We could |
84fa4f43 JB |
1342 | * intersect them, but that seems unlikely |
1343 | * to be correct. Reject second one for now. | |
1344 | */ | |
2f92cd2e | 1345 | if (regdom_changes(pending_request->alpha2)) |
2f92212b JB |
1346 | return REG_REQ_IGNORE; |
1347 | return REG_REQ_ALREADY_SET; | |
84fa4f43 | 1348 | } |
fb1fc7ad LR |
1349 | /* |
1350 | * Two consecutive Country IE hints on the same wiphy. | |
1351 | * This should be picked up early by the driver/stack | |
1352 | */ | |
2f92cd2e | 1353 | if (WARN_ON(regdom_changes(pending_request->alpha2))) |
2f92212b JB |
1354 | return REG_REQ_OK; |
1355 | return REG_REQ_ALREADY_SET; | |
84fa4f43 | 1356 | } |
a171fba4 | 1357 | return 0; |
7db90f4a | 1358 | case NL80211_REGDOM_SET_BY_DRIVER: |
c492db37 | 1359 | if (lr->initiator == NL80211_REGDOM_SET_BY_CORE) { |
2f92cd2e | 1360 | if (regdom_changes(pending_request->alpha2)) |
2f92212b JB |
1361 | return REG_REQ_OK; |
1362 | return REG_REQ_ALREADY_SET; | |
e74b1e7f | 1363 | } |
fff32c04 LR |
1364 | |
1365 | /* | |
1366 | * This would happen if you unplug and plug your card | |
1367 | * back in or if you add a new device for which the previously | |
1368 | * loaded card also agrees on the regulatory domain. | |
1369 | */ | |
c492db37 | 1370 | if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER && |
2f92cd2e | 1371 | !regdom_changes(pending_request->alpha2)) |
2f92212b | 1372 | return REG_REQ_ALREADY_SET; |
fff32c04 | 1373 | |
2f92212b | 1374 | return REG_REQ_INTERSECT; |
7db90f4a | 1375 | case NL80211_REGDOM_SET_BY_USER: |
57b5ce07 LR |
1376 | if (reg_request_cell_base(pending_request)) |
1377 | return reg_ignore_cell_hint(pending_request); | |
1378 | ||
c492db37 | 1379 | if (reg_request_cell_base(lr)) |
2f92212b | 1380 | return REG_REQ_IGNORE; |
57b5ce07 | 1381 | |
c492db37 | 1382 | if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) |
2f92212b | 1383 | return REG_REQ_INTERSECT; |
fb1fc7ad LR |
1384 | /* |
1385 | * If the user knows better the user should set the regdom | |
1386 | * to their country before the IE is picked up | |
1387 | */ | |
c492db37 JB |
1388 | if (lr->initiator == NL80211_REGDOM_SET_BY_USER && |
1389 | lr->intersect) | |
2f92212b | 1390 | return REG_REQ_IGNORE; |
fb1fc7ad LR |
1391 | /* |
1392 | * Process user requests only after previous user/driver/core | |
1393 | * requests have been processed | |
1394 | */ | |
c492db37 JB |
1395 | if ((lr->initiator == NL80211_REGDOM_SET_BY_CORE || |
1396 | lr->initiator == NL80211_REGDOM_SET_BY_DRIVER || | |
1397 | lr->initiator == NL80211_REGDOM_SET_BY_USER) && | |
1398 | regdom_changes(lr->alpha2)) | |
2f92212b | 1399 | return REG_REQ_IGNORE; |
5eebade6 | 1400 | |
baeb66fe | 1401 | if (!regdom_changes(pending_request->alpha2)) |
2f92212b | 1402 | return REG_REQ_ALREADY_SET; |
e74b1e7f | 1403 | |
2f92212b | 1404 | return REG_REQ_OK; |
84fa4f43 JB |
1405 | } |
1406 | ||
2f92212b | 1407 | return REG_REQ_IGNORE; |
84fa4f43 JB |
1408 | } |
1409 | ||
b2e253cf LR |
1410 | static void reg_set_request_processed(void) |
1411 | { | |
1412 | bool need_more_processing = false; | |
c492db37 | 1413 | struct regulatory_request *lr = get_last_request(); |
b2e253cf | 1414 | |
c492db37 | 1415 | lr->processed = true; |
b2e253cf LR |
1416 | |
1417 | spin_lock(®_requests_lock); | |
1418 | if (!list_empty(®_requests_list)) | |
1419 | need_more_processing = true; | |
1420 | spin_unlock(®_requests_lock); | |
1421 | ||
c492db37 | 1422 | if (lr->initiator == NL80211_REGDOM_SET_BY_USER) |
fe20b39e | 1423 | cancel_delayed_work(®_timeout); |
a90c7a31 | 1424 | |
b2e253cf LR |
1425 | if (need_more_processing) |
1426 | schedule_work(®_work); | |
1427 | } | |
1428 | ||
d1c96a9a LR |
1429 | /** |
1430 | * __regulatory_hint - hint to the wireless core a regulatory domain | |
1431 | * @wiphy: if the hint comes from country information from an AP, this | |
1432 | * is required to be set to the wiphy that received the information | |
28da32d7 | 1433 | * @pending_request: the regulatory request currently being processed |
d1c96a9a LR |
1434 | * |
1435 | * The Wireless subsystem can use this function to hint to the wireless core | |
28da32d7 | 1436 | * what it believes should be the current regulatory domain. |
d1c96a9a | 1437 | * |
2f92212b | 1438 | * Returns one of the different reg request treatment values. |
d1c96a9a | 1439 | * |
458f4f9e | 1440 | * Caller must hold ®_mutex |
d1c96a9a | 1441 | */ |
2f92212b JB |
1442 | static enum reg_request_treatment |
1443 | __regulatory_hint(struct wiphy *wiphy, | |
1444 | struct regulatory_request *pending_request) | |
b2e1b302 | 1445 | { |
e9763c3c | 1446 | const struct ieee80211_regdomain *regd; |
9c96477d | 1447 | bool intersect = false; |
2f92212b | 1448 | enum reg_request_treatment treatment; |
c492db37 | 1449 | struct regulatory_request *lr; |
b2e1b302 | 1450 | |
2f92212b | 1451 | treatment = get_reg_request_treatment(wiphy, pending_request); |
9c96477d | 1452 | |
2f92212b JB |
1453 | switch (treatment) { |
1454 | case REG_REQ_INTERSECT: | |
7db90f4a LR |
1455 | if (pending_request->initiator == |
1456 | NL80211_REGDOM_SET_BY_DRIVER) { | |
458f4f9e | 1457 | regd = reg_copy_regd(get_cfg80211_regdom()); |
e9763c3c | 1458 | if (IS_ERR(regd)) { |
d951c1dd | 1459 | kfree(pending_request); |
e9763c3c | 1460 | return PTR_ERR(regd); |
d951c1dd | 1461 | } |
458f4f9e | 1462 | rcu_assign_pointer(wiphy->regd, regd); |
3e0c3ff3 | 1463 | } |
9c96477d | 1464 | intersect = true; |
2f92212b JB |
1465 | break; |
1466 | case REG_REQ_OK: | |
1467 | break; | |
1468 | default: | |
fb1fc7ad LR |
1469 | /* |
1470 | * If the regulatory domain being requested by the | |
3e0c3ff3 | 1471 | * driver has already been set just copy it to the |
fb1fc7ad LR |
1472 | * wiphy |
1473 | */ | |
2f92212b JB |
1474 | if (treatment == REG_REQ_ALREADY_SET && |
1475 | pending_request->initiator == NL80211_REGDOM_SET_BY_DRIVER) { | |
458f4f9e | 1476 | regd = reg_copy_regd(get_cfg80211_regdom()); |
e9763c3c | 1477 | if (IS_ERR(regd)) { |
d951c1dd | 1478 | kfree(pending_request); |
2f92212b | 1479 | return REG_REQ_IGNORE; |
d951c1dd | 1480 | } |
2f92212b | 1481 | treatment = REG_REQ_ALREADY_SET; |
458f4f9e | 1482 | rcu_assign_pointer(wiphy->regd, regd); |
3e0c3ff3 LR |
1483 | goto new_request; |
1484 | } | |
d951c1dd | 1485 | kfree(pending_request); |
2f92212b | 1486 | return treatment; |
3e0c3ff3 | 1487 | } |
b2e1b302 | 1488 | |
3e0c3ff3 | 1489 | new_request: |
c492db37 JB |
1490 | lr = get_last_request(); |
1491 | if (lr != &core_request_world && lr) | |
1492 | kfree_rcu(lr, rcu_head); | |
5203cdb6 | 1493 | |
c492db37 JB |
1494 | pending_request->intersect = intersect; |
1495 | pending_request->processed = false; | |
1496 | rcu_assign_pointer(last_request, pending_request); | |
1497 | lr = pending_request; | |
5203cdb6 | 1498 | |
d951c1dd | 1499 | pending_request = NULL; |
3e0c3ff3 | 1500 | |
c492db37 JB |
1501 | if (lr->initiator == NL80211_REGDOM_SET_BY_USER) { |
1502 | user_alpha2[0] = lr->alpha2[0]; | |
1503 | user_alpha2[1] = lr->alpha2[1]; | |
09d989d1 LR |
1504 | } |
1505 | ||
2f92212b JB |
1506 | /* When r == REG_REQ_INTERSECT we do need to call CRDA */ |
1507 | if (treatment != REG_REQ_OK && treatment != REG_REQ_INTERSECT) { | |
73d54c9e LR |
1508 | /* |
1509 | * Since CRDA will not be called in this case as we already | |
1510 | * have applied the requested regulatory domain before we just | |
1511 | * inform userspace we have processed the request | |
1512 | */ | |
2f92212b | 1513 | if (treatment == REG_REQ_ALREADY_SET) { |
c492db37 | 1514 | nl80211_send_reg_change_event(lr); |
b2e253cf LR |
1515 | reg_set_request_processed(); |
1516 | } | |
2f92212b | 1517 | return treatment; |
73d54c9e | 1518 | } |
3e0c3ff3 | 1519 | |
c492db37 | 1520 | if (call_crda(lr->alpha2)) |
2f92212b JB |
1521 | return REG_REQ_IGNORE; |
1522 | return REG_REQ_OK; | |
b2e1b302 LR |
1523 | } |
1524 | ||
30a548c7 | 1525 | /* This processes *all* regulatory hints */ |
8848bef0 LR |
1526 | static void reg_process_hint(struct regulatory_request *reg_request, |
1527 | enum nl80211_reg_initiator reg_initiator) | |
fe33eb39 | 1528 | { |
fe33eb39 LR |
1529 | struct wiphy *wiphy = NULL; |
1530 | ||
fdc9d7b2 JB |
1531 | if (WARN_ON(!reg_request->alpha2)) |
1532 | return; | |
fe33eb39 | 1533 | |
f4173766 | 1534 | if (reg_request->wiphy_idx != WIPHY_IDX_INVALID) |
fe33eb39 LR |
1535 | wiphy = wiphy_idx_to_wiphy(reg_request->wiphy_idx); |
1536 | ||
1a919318 | 1537 | if (reg_initiator == NL80211_REGDOM_SET_BY_DRIVER && !wiphy) { |
d951c1dd | 1538 | kfree(reg_request); |
b0e2880b | 1539 | return; |
fe33eb39 LR |
1540 | } |
1541 | ||
2f92212b JB |
1542 | switch (__regulatory_hint(wiphy, reg_request)) { |
1543 | case REG_REQ_ALREADY_SET: | |
1544 | /* This is required so that the orig_* parameters are saved */ | |
1545 | if (wiphy && wiphy->flags & WIPHY_FLAG_STRICT_REGULATORY) | |
1546 | wiphy_update_regulatory(wiphy, reg_initiator); | |
1547 | break; | |
1548 | default: | |
1549 | if (reg_initiator == NL80211_REGDOM_SET_BY_USER) | |
1550 | schedule_delayed_work(®_timeout, | |
1551 | msecs_to_jiffies(3142)); | |
1552 | break; | |
a90c7a31 | 1553 | } |
fe33eb39 LR |
1554 | } |
1555 | ||
b2e253cf LR |
1556 | /* |
1557 | * Processes regulatory hints, this is all the NL80211_REGDOM_SET_BY_* | |
1558 | * Regulatory hints come on a first come first serve basis and we | |
1559 | * must process each one atomically. | |
1560 | */ | |
fe33eb39 | 1561 | static void reg_process_pending_hints(void) |
b0e2880b | 1562 | { |
c492db37 | 1563 | struct regulatory_request *reg_request, *lr; |
fe33eb39 | 1564 | |
b0e2880b LR |
1565 | mutex_lock(&cfg80211_mutex); |
1566 | mutex_lock(®_mutex); | |
c492db37 | 1567 | lr = get_last_request(); |
b0e2880b | 1568 | |
b2e253cf | 1569 | /* When last_request->processed becomes true this will be rescheduled */ |
c492db37 | 1570 | if (lr && !lr->processed) { |
1a919318 | 1571 | REG_DBG_PRINT("Pending regulatory request, waiting for it to be processed...\n"); |
b2e253cf LR |
1572 | goto out; |
1573 | } | |
1574 | ||
fe33eb39 | 1575 | spin_lock(®_requests_lock); |
fe33eb39 | 1576 | |
b2e253cf | 1577 | if (list_empty(®_requests_list)) { |
d951c1dd | 1578 | spin_unlock(®_requests_lock); |
b2e253cf | 1579 | goto out; |
fe33eb39 | 1580 | } |
b2e253cf LR |
1581 | |
1582 | reg_request = list_first_entry(®_requests_list, | |
1583 | struct regulatory_request, | |
1584 | list); | |
1585 | list_del_init(®_request->list); | |
1586 | ||
fe33eb39 | 1587 | spin_unlock(®_requests_lock); |
b0e2880b | 1588 | |
8848bef0 | 1589 | reg_process_hint(reg_request, reg_request->initiator); |
b2e253cf LR |
1590 | |
1591 | out: | |
b0e2880b LR |
1592 | mutex_unlock(®_mutex); |
1593 | mutex_unlock(&cfg80211_mutex); | |
fe33eb39 LR |
1594 | } |
1595 | ||
e38f8a7a LR |
1596 | /* Processes beacon hints -- this has nothing to do with country IEs */ |
1597 | static void reg_process_pending_beacon_hints(void) | |
1598 | { | |
79c97e97 | 1599 | struct cfg80211_registered_device *rdev; |
e38f8a7a LR |
1600 | struct reg_beacon *pending_beacon, *tmp; |
1601 | ||
1602 | mutex_lock(&cfg80211_mutex); | |
0f500a5f | 1603 | mutex_lock(®_mutex); |
e38f8a7a LR |
1604 | |
1605 | /* This goes through the _pending_ beacon list */ | |
1606 | spin_lock_bh(®_pending_beacons_lock); | |
1607 | ||
e38f8a7a LR |
1608 | list_for_each_entry_safe(pending_beacon, tmp, |
1609 | ®_pending_beacons, list) { | |
e38f8a7a LR |
1610 | list_del_init(&pending_beacon->list); |
1611 | ||
1612 | /* Applies the beacon hint to current wiphys */ | |
79c97e97 JB |
1613 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) |
1614 | wiphy_update_new_beacon(&rdev->wiphy, pending_beacon); | |
e38f8a7a LR |
1615 | |
1616 | /* Remembers the beacon hint for new wiphys or reg changes */ | |
1617 | list_add_tail(&pending_beacon->list, ®_beacon_list); | |
1618 | } | |
1619 | ||
1620 | spin_unlock_bh(®_pending_beacons_lock); | |
0f500a5f | 1621 | mutex_unlock(®_mutex); |
e38f8a7a LR |
1622 | mutex_unlock(&cfg80211_mutex); |
1623 | } | |
1624 | ||
fe33eb39 LR |
1625 | static void reg_todo(struct work_struct *work) |
1626 | { | |
1627 | reg_process_pending_hints(); | |
e38f8a7a | 1628 | reg_process_pending_beacon_hints(); |
fe33eb39 LR |
1629 | } |
1630 | ||
fe33eb39 LR |
1631 | static void queue_regulatory_request(struct regulatory_request *request) |
1632 | { | |
d4f2c881 JB |
1633 | request->alpha2[0] = toupper(request->alpha2[0]); |
1634 | request->alpha2[1] = toupper(request->alpha2[1]); | |
c61029c7 | 1635 | |
fe33eb39 LR |
1636 | spin_lock(®_requests_lock); |
1637 | list_add_tail(&request->list, ®_requests_list); | |
1638 | spin_unlock(®_requests_lock); | |
1639 | ||
1640 | schedule_work(®_work); | |
1641 | } | |
1642 | ||
09d989d1 LR |
1643 | /* |
1644 | * Core regulatory hint -- happens during cfg80211_init() | |
1645 | * and when we restore regulatory settings. | |
1646 | */ | |
ba25c141 LR |
1647 | static int regulatory_hint_core(const char *alpha2) |
1648 | { | |
1649 | struct regulatory_request *request; | |
1650 | ||
1a919318 | 1651 | request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); |
ba25c141 LR |
1652 | if (!request) |
1653 | return -ENOMEM; | |
1654 | ||
1655 | request->alpha2[0] = alpha2[0]; | |
1656 | request->alpha2[1] = alpha2[1]; | |
7db90f4a | 1657 | request->initiator = NL80211_REGDOM_SET_BY_CORE; |
ba25c141 | 1658 | |
31e99729 | 1659 | queue_regulatory_request(request); |
5078b2e3 | 1660 | |
fe33eb39 | 1661 | return 0; |
ba25c141 LR |
1662 | } |
1663 | ||
fe33eb39 | 1664 | /* User hints */ |
57b5ce07 LR |
1665 | int regulatory_hint_user(const char *alpha2, |
1666 | enum nl80211_user_reg_hint_type user_reg_hint_type) | |
b2e1b302 | 1667 | { |
fe33eb39 LR |
1668 | struct regulatory_request *request; |
1669 | ||
fdc9d7b2 JB |
1670 | if (WARN_ON(!alpha2)) |
1671 | return -EINVAL; | |
b2e1b302 | 1672 | |
fe33eb39 LR |
1673 | request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); |
1674 | if (!request) | |
1675 | return -ENOMEM; | |
1676 | ||
f4173766 | 1677 | request->wiphy_idx = WIPHY_IDX_INVALID; |
fe33eb39 LR |
1678 | request->alpha2[0] = alpha2[0]; |
1679 | request->alpha2[1] = alpha2[1]; | |
e12822e1 | 1680 | request->initiator = NL80211_REGDOM_SET_BY_USER; |
57b5ce07 | 1681 | request->user_reg_hint_type = user_reg_hint_type; |
fe33eb39 LR |
1682 | |
1683 | queue_regulatory_request(request); | |
1684 | ||
1685 | return 0; | |
1686 | } | |
1687 | ||
1688 | /* Driver hints */ | |
1689 | int regulatory_hint(struct wiphy *wiphy, const char *alpha2) | |
1690 | { | |
1691 | struct regulatory_request *request; | |
1692 | ||
fdc9d7b2 JB |
1693 | if (WARN_ON(!alpha2 || !wiphy)) |
1694 | return -EINVAL; | |
fe33eb39 LR |
1695 | |
1696 | request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); | |
1697 | if (!request) | |
1698 | return -ENOMEM; | |
1699 | ||
1700 | request->wiphy_idx = get_wiphy_idx(wiphy); | |
1701 | ||
fe33eb39 LR |
1702 | request->alpha2[0] = alpha2[0]; |
1703 | request->alpha2[1] = alpha2[1]; | |
7db90f4a | 1704 | request->initiator = NL80211_REGDOM_SET_BY_DRIVER; |
fe33eb39 LR |
1705 | |
1706 | queue_regulatory_request(request); | |
1707 | ||
1708 | return 0; | |
b2e1b302 LR |
1709 | } |
1710 | EXPORT_SYMBOL(regulatory_hint); | |
1711 | ||
4b44c8bc LR |
1712 | /* |
1713 | * We hold wdev_lock() here so we cannot hold cfg80211_mutex() and | |
1714 | * therefore cannot iterate over the rdev list here. | |
1715 | */ | |
1a919318 JB |
1716 | void regulatory_hint_11d(struct wiphy *wiphy, enum ieee80211_band band, |
1717 | const u8 *country_ie, u8 country_ie_len) | |
3f2355cb | 1718 | { |
3f2355cb | 1719 | char alpha2[2]; |
3f2355cb | 1720 | enum environment_cap env = ENVIRON_ANY; |
c492db37 | 1721 | struct regulatory_request *request, *lr; |
3f2355cb | 1722 | |
abc7381b | 1723 | mutex_lock(®_mutex); |
c492db37 | 1724 | lr = get_last_request(); |
3f2355cb | 1725 | |
c492db37 | 1726 | if (unlikely(!lr)) |
9828b017 | 1727 | goto out; |
d335fe63 | 1728 | |
3f2355cb LR |
1729 | /* IE len must be evenly divisible by 2 */ |
1730 | if (country_ie_len & 0x01) | |
1731 | goto out; | |
1732 | ||
1733 | if (country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN) | |
1734 | goto out; | |
1735 | ||
3f2355cb LR |
1736 | alpha2[0] = country_ie[0]; |
1737 | alpha2[1] = country_ie[1]; | |
1738 | ||
1739 | if (country_ie[2] == 'I') | |
1740 | env = ENVIRON_INDOOR; | |
1741 | else if (country_ie[2] == 'O') | |
1742 | env = ENVIRON_OUTDOOR; | |
1743 | ||
fb1fc7ad | 1744 | /* |
8b19e6ca | 1745 | * We will run this only upon a successful connection on cfg80211. |
4b44c8bc LR |
1746 | * We leave conflict resolution to the workqueue, where can hold |
1747 | * cfg80211_mutex. | |
fb1fc7ad | 1748 | */ |
c492db37 JB |
1749 | if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE && |
1750 | lr->wiphy_idx != WIPHY_IDX_INVALID) | |
4b44c8bc | 1751 | goto out; |
3f2355cb | 1752 | |
fe33eb39 LR |
1753 | request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); |
1754 | if (!request) | |
f9f9b6e3 | 1755 | goto out; |
fe33eb39 | 1756 | |
fe33eb39 | 1757 | request->wiphy_idx = get_wiphy_idx(wiphy); |
4f366c5d JL |
1758 | request->alpha2[0] = alpha2[0]; |
1759 | request->alpha2[1] = alpha2[1]; | |
7db90f4a | 1760 | request->initiator = NL80211_REGDOM_SET_BY_COUNTRY_IE; |
fe33eb39 LR |
1761 | request->country_ie_env = env; |
1762 | ||
fe33eb39 | 1763 | queue_regulatory_request(request); |
3f2355cb | 1764 | out: |
abc7381b | 1765 | mutex_unlock(®_mutex); |
3f2355cb | 1766 | } |
b2e1b302 | 1767 | |
09d989d1 LR |
1768 | static void restore_alpha2(char *alpha2, bool reset_user) |
1769 | { | |
1770 | /* indicates there is no alpha2 to consider for restoration */ | |
1771 | alpha2[0] = '9'; | |
1772 | alpha2[1] = '7'; | |
1773 | ||
1774 | /* The user setting has precedence over the module parameter */ | |
1775 | if (is_user_regdom_saved()) { | |
1776 | /* Unless we're asked to ignore it and reset it */ | |
1777 | if (reset_user) { | |
1a919318 | 1778 | REG_DBG_PRINT("Restoring regulatory settings including user preference\n"); |
09d989d1 LR |
1779 | user_alpha2[0] = '9'; |
1780 | user_alpha2[1] = '7'; | |
1781 | ||
1782 | /* | |
1783 | * If we're ignoring user settings, we still need to | |
1784 | * check the module parameter to ensure we put things | |
1785 | * back as they were for a full restore. | |
1786 | */ | |
1787 | if (!is_world_regdom(ieee80211_regdom)) { | |
1a919318 JB |
1788 | REG_DBG_PRINT("Keeping preference on module parameter ieee80211_regdom: %c%c\n", |
1789 | ieee80211_regdom[0], ieee80211_regdom[1]); | |
09d989d1 LR |
1790 | alpha2[0] = ieee80211_regdom[0]; |
1791 | alpha2[1] = ieee80211_regdom[1]; | |
1792 | } | |
1793 | } else { | |
1a919318 JB |
1794 | REG_DBG_PRINT("Restoring regulatory settings while preserving user preference for: %c%c\n", |
1795 | user_alpha2[0], user_alpha2[1]); | |
09d989d1 LR |
1796 | alpha2[0] = user_alpha2[0]; |
1797 | alpha2[1] = user_alpha2[1]; | |
1798 | } | |
1799 | } else if (!is_world_regdom(ieee80211_regdom)) { | |
1a919318 JB |
1800 | REG_DBG_PRINT("Keeping preference on module parameter ieee80211_regdom: %c%c\n", |
1801 | ieee80211_regdom[0], ieee80211_regdom[1]); | |
09d989d1 LR |
1802 | alpha2[0] = ieee80211_regdom[0]; |
1803 | alpha2[1] = ieee80211_regdom[1]; | |
1804 | } else | |
d91e41b6 | 1805 | REG_DBG_PRINT("Restoring regulatory settings\n"); |
09d989d1 LR |
1806 | } |
1807 | ||
5ce543d1 RM |
1808 | static void restore_custom_reg_settings(struct wiphy *wiphy) |
1809 | { | |
1810 | struct ieee80211_supported_band *sband; | |
1811 | enum ieee80211_band band; | |
1812 | struct ieee80211_channel *chan; | |
1813 | int i; | |
1814 | ||
1815 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) { | |
1816 | sband = wiphy->bands[band]; | |
1817 | if (!sband) | |
1818 | continue; | |
1819 | for (i = 0; i < sband->n_channels; i++) { | |
1820 | chan = &sband->channels[i]; | |
1821 | chan->flags = chan->orig_flags; | |
1822 | chan->max_antenna_gain = chan->orig_mag; | |
1823 | chan->max_power = chan->orig_mpwr; | |
899852af | 1824 | chan->beacon_found = false; |
5ce543d1 RM |
1825 | } |
1826 | } | |
1827 | } | |
1828 | ||
09d989d1 LR |
1829 | /* |
1830 | * Restoring regulatory settings involves ingoring any | |
1831 | * possibly stale country IE information and user regulatory | |
1832 | * settings if so desired, this includes any beacon hints | |
1833 | * learned as we could have traveled outside to another country | |
1834 | * after disconnection. To restore regulatory settings we do | |
1835 | * exactly what we did at bootup: | |
1836 | * | |
1837 | * - send a core regulatory hint | |
1838 | * - send a user regulatory hint if applicable | |
1839 | * | |
1840 | * Device drivers that send a regulatory hint for a specific country | |
1841 | * keep their own regulatory domain on wiphy->regd so that does does | |
1842 | * not need to be remembered. | |
1843 | */ | |
1844 | static void restore_regulatory_settings(bool reset_user) | |
1845 | { | |
1846 | char alpha2[2]; | |
cee0bec5 | 1847 | char world_alpha2[2]; |
09d989d1 | 1848 | struct reg_beacon *reg_beacon, *btmp; |
14609555 LR |
1849 | struct regulatory_request *reg_request, *tmp; |
1850 | LIST_HEAD(tmp_reg_req_list); | |
5ce543d1 | 1851 | struct cfg80211_registered_device *rdev; |
09d989d1 LR |
1852 | |
1853 | mutex_lock(&cfg80211_mutex); | |
1854 | mutex_lock(®_mutex); | |
1855 | ||
2d319867 | 1856 | reset_regdomains(true, &world_regdom); |
09d989d1 LR |
1857 | restore_alpha2(alpha2, reset_user); |
1858 | ||
14609555 LR |
1859 | /* |
1860 | * If there's any pending requests we simply | |
1861 | * stash them to a temporary pending queue and | |
1862 | * add then after we've restored regulatory | |
1863 | * settings. | |
1864 | */ | |
1865 | spin_lock(®_requests_lock); | |
fea9bced JB |
1866 | list_for_each_entry_safe(reg_request, tmp, ®_requests_list, list) { |
1867 | if (reg_request->initiator != NL80211_REGDOM_SET_BY_USER) | |
1868 | continue; | |
1869 | list_move_tail(®_request->list, &tmp_reg_req_list); | |
14609555 LR |
1870 | } |
1871 | spin_unlock(®_requests_lock); | |
1872 | ||
09d989d1 LR |
1873 | /* Clear beacon hints */ |
1874 | spin_lock_bh(®_pending_beacons_lock); | |
fea9bced JB |
1875 | list_for_each_entry_safe(reg_beacon, btmp, ®_pending_beacons, list) { |
1876 | list_del(®_beacon->list); | |
1877 | kfree(reg_beacon); | |
09d989d1 LR |
1878 | } |
1879 | spin_unlock_bh(®_pending_beacons_lock); | |
1880 | ||
fea9bced JB |
1881 | list_for_each_entry_safe(reg_beacon, btmp, ®_beacon_list, list) { |
1882 | list_del(®_beacon->list); | |
1883 | kfree(reg_beacon); | |
09d989d1 LR |
1884 | } |
1885 | ||
1886 | /* First restore to the basic regulatory settings */ | |
379b82f4 JB |
1887 | world_alpha2[0] = cfg80211_world_regdom->alpha2[0]; |
1888 | world_alpha2[1] = cfg80211_world_regdom->alpha2[1]; | |
09d989d1 | 1889 | |
5ce543d1 RM |
1890 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) { |
1891 | if (rdev->wiphy.flags & WIPHY_FLAG_CUSTOM_REGULATORY) | |
1892 | restore_custom_reg_settings(&rdev->wiphy); | |
1893 | } | |
1894 | ||
cee0bec5 | 1895 | regulatory_hint_core(world_alpha2); |
09d989d1 LR |
1896 | |
1897 | /* | |
1898 | * This restores the ieee80211_regdom module parameter | |
1899 | * preference or the last user requested regulatory | |
1900 | * settings, user regulatory settings takes precedence. | |
1901 | */ | |
1902 | if (is_an_alpha2(alpha2)) | |
57b5ce07 | 1903 | regulatory_hint_user(user_alpha2, NL80211_USER_REG_HINT_USER); |
09d989d1 | 1904 | |
14609555 | 1905 | spin_lock(®_requests_lock); |
11cff96c | 1906 | list_splice_tail_init(&tmp_reg_req_list, ®_requests_list); |
14609555 LR |
1907 | spin_unlock(®_requests_lock); |
1908 | ||
1909 | mutex_unlock(®_mutex); | |
1910 | mutex_unlock(&cfg80211_mutex); | |
1911 | ||
1912 | REG_DBG_PRINT("Kicking the queue\n"); | |
1913 | ||
1914 | schedule_work(®_work); | |
1915 | } | |
09d989d1 LR |
1916 | |
1917 | void regulatory_hint_disconnect(void) | |
1918 | { | |
1a919318 | 1919 | REG_DBG_PRINT("All devices are disconnected, going to restore regulatory settings\n"); |
09d989d1 LR |
1920 | restore_regulatory_settings(false); |
1921 | } | |
1922 | ||
e38f8a7a LR |
1923 | static bool freq_is_chan_12_13_14(u16 freq) |
1924 | { | |
59eb21a6 BR |
1925 | if (freq == ieee80211_channel_to_frequency(12, IEEE80211_BAND_2GHZ) || |
1926 | freq == ieee80211_channel_to_frequency(13, IEEE80211_BAND_2GHZ) || | |
1927 | freq == ieee80211_channel_to_frequency(14, IEEE80211_BAND_2GHZ)) | |
e38f8a7a LR |
1928 | return true; |
1929 | return false; | |
1930 | } | |
1931 | ||
3ebfa6e7 LR |
1932 | static bool pending_reg_beacon(struct ieee80211_channel *beacon_chan) |
1933 | { | |
1934 | struct reg_beacon *pending_beacon; | |
1935 | ||
1936 | list_for_each_entry(pending_beacon, ®_pending_beacons, list) | |
1937 | if (beacon_chan->center_freq == | |
1938 | pending_beacon->chan.center_freq) | |
1939 | return true; | |
1940 | return false; | |
1941 | } | |
1942 | ||
e38f8a7a LR |
1943 | int regulatory_hint_found_beacon(struct wiphy *wiphy, |
1944 | struct ieee80211_channel *beacon_chan, | |
1945 | gfp_t gfp) | |
1946 | { | |
1947 | struct reg_beacon *reg_beacon; | |
3ebfa6e7 | 1948 | bool processing; |
e38f8a7a | 1949 | |
1a919318 JB |
1950 | if (beacon_chan->beacon_found || |
1951 | beacon_chan->flags & IEEE80211_CHAN_RADAR || | |
e38f8a7a | 1952 | (beacon_chan->band == IEEE80211_BAND_2GHZ && |
1a919318 | 1953 | !freq_is_chan_12_13_14(beacon_chan->center_freq))) |
e38f8a7a LR |
1954 | return 0; |
1955 | ||
3ebfa6e7 LR |
1956 | spin_lock_bh(®_pending_beacons_lock); |
1957 | processing = pending_reg_beacon(beacon_chan); | |
1958 | spin_unlock_bh(®_pending_beacons_lock); | |
1959 | ||
1960 | if (processing) | |
1961 | return 0; | |
1962 | ||
e38f8a7a LR |
1963 | reg_beacon = kzalloc(sizeof(struct reg_beacon), gfp); |
1964 | if (!reg_beacon) | |
1965 | return -ENOMEM; | |
1966 | ||
1a919318 | 1967 | REG_DBG_PRINT("Found new beacon on frequency: %d MHz (Ch %d) on %s\n", |
4113f751 LR |
1968 | beacon_chan->center_freq, |
1969 | ieee80211_frequency_to_channel(beacon_chan->center_freq), | |
1970 | wiphy_name(wiphy)); | |
1971 | ||
e38f8a7a | 1972 | memcpy(®_beacon->chan, beacon_chan, |
1a919318 | 1973 | sizeof(struct ieee80211_channel)); |
e38f8a7a LR |
1974 | |
1975 | /* | |
1976 | * Since we can be called from BH or and non-BH context | |
1977 | * we must use spin_lock_bh() | |
1978 | */ | |
1979 | spin_lock_bh(®_pending_beacons_lock); | |
1980 | list_add_tail(®_beacon->list, ®_pending_beacons); | |
1981 | spin_unlock_bh(®_pending_beacons_lock); | |
1982 | ||
1983 | schedule_work(®_work); | |
1984 | ||
1985 | return 0; | |
1986 | } | |
1987 | ||
a3d2eaf0 | 1988 | static void print_rd_rules(const struct ieee80211_regdomain *rd) |
b2e1b302 LR |
1989 | { |
1990 | unsigned int i; | |
a3d2eaf0 JB |
1991 | const struct ieee80211_reg_rule *reg_rule = NULL; |
1992 | const struct ieee80211_freq_range *freq_range = NULL; | |
1993 | const struct ieee80211_power_rule *power_rule = NULL; | |
b2e1b302 | 1994 | |
6653325a | 1995 | pr_info(" (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)\n"); |
b2e1b302 LR |
1996 | |
1997 | for (i = 0; i < rd->n_reg_rules; i++) { | |
1998 | reg_rule = &rd->reg_rules[i]; | |
1999 | freq_range = ®_rule->freq_range; | |
2000 | power_rule = ®_rule->power_rule; | |
2001 | ||
fb1fc7ad LR |
2002 | /* |
2003 | * There may not be documentation for max antenna gain | |
2004 | * in certain regions | |
2005 | */ | |
b2e1b302 | 2006 | if (power_rule->max_antenna_gain) |
6653325a | 2007 | pr_info(" (%d KHz - %d KHz @ %d KHz), (%d mBi, %d mBm)\n", |
b2e1b302 LR |
2008 | freq_range->start_freq_khz, |
2009 | freq_range->end_freq_khz, | |
2010 | freq_range->max_bandwidth_khz, | |
2011 | power_rule->max_antenna_gain, | |
2012 | power_rule->max_eirp); | |
2013 | else | |
6653325a | 2014 | pr_info(" (%d KHz - %d KHz @ %d KHz), (N/A, %d mBm)\n", |
b2e1b302 LR |
2015 | freq_range->start_freq_khz, |
2016 | freq_range->end_freq_khz, | |
2017 | freq_range->max_bandwidth_khz, | |
2018 | power_rule->max_eirp); | |
2019 | } | |
2020 | } | |
2021 | ||
8b60b078 LR |
2022 | bool reg_supported_dfs_region(u8 dfs_region) |
2023 | { | |
2024 | switch (dfs_region) { | |
2025 | case NL80211_DFS_UNSET: | |
2026 | case NL80211_DFS_FCC: | |
2027 | case NL80211_DFS_ETSI: | |
2028 | case NL80211_DFS_JP: | |
2029 | return true; | |
2030 | default: | |
2031 | REG_DBG_PRINT("Ignoring uknown DFS master region: %d\n", | |
2032 | dfs_region); | |
2033 | return false; | |
2034 | } | |
2035 | } | |
2036 | ||
2037 | static void print_dfs_region(u8 dfs_region) | |
2038 | { | |
2039 | if (!dfs_region) | |
2040 | return; | |
2041 | ||
2042 | switch (dfs_region) { | |
2043 | case NL80211_DFS_FCC: | |
2044 | pr_info(" DFS Master region FCC"); | |
2045 | break; | |
2046 | case NL80211_DFS_ETSI: | |
2047 | pr_info(" DFS Master region ETSI"); | |
2048 | break; | |
2049 | case NL80211_DFS_JP: | |
2050 | pr_info(" DFS Master region JP"); | |
2051 | break; | |
2052 | default: | |
1a919318 | 2053 | pr_info(" DFS Master region Unknown"); |
8b60b078 LR |
2054 | break; |
2055 | } | |
2056 | } | |
2057 | ||
a3d2eaf0 | 2058 | static void print_regdomain(const struct ieee80211_regdomain *rd) |
b2e1b302 | 2059 | { |
c492db37 | 2060 | struct regulatory_request *lr = get_last_request(); |
b2e1b302 | 2061 | |
3f2355cb | 2062 | if (is_intersected_alpha2(rd->alpha2)) { |
c492db37 | 2063 | if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) { |
79c97e97 | 2064 | struct cfg80211_registered_device *rdev; |
c492db37 | 2065 | rdev = cfg80211_rdev_by_wiphy_idx(lr->wiphy_idx); |
79c97e97 | 2066 | if (rdev) { |
e9c0268f | 2067 | pr_info("Current regulatory domain updated by AP to: %c%c\n", |
79c97e97 JB |
2068 | rdev->country_ie_alpha2[0], |
2069 | rdev->country_ie_alpha2[1]); | |
3f2355cb | 2070 | } else |
e9c0268f | 2071 | pr_info("Current regulatory domain intersected:\n"); |
3f2355cb | 2072 | } else |
e9c0268f | 2073 | pr_info("Current regulatory domain intersected:\n"); |
1a919318 | 2074 | } else if (is_world_regdom(rd->alpha2)) { |
e9c0268f | 2075 | pr_info("World regulatory domain updated:\n"); |
1a919318 | 2076 | } else { |
b2e1b302 | 2077 | if (is_unknown_alpha2(rd->alpha2)) |
e9c0268f | 2078 | pr_info("Regulatory domain changed to driver built-in settings (unknown country)\n"); |
57b5ce07 | 2079 | else { |
c492db37 | 2080 | if (reg_request_cell_base(lr)) |
1a919318 | 2081 | pr_info("Regulatory domain changed to country: %c%c by Cell Station\n", |
57b5ce07 LR |
2082 | rd->alpha2[0], rd->alpha2[1]); |
2083 | else | |
1a919318 | 2084 | pr_info("Regulatory domain changed to country: %c%c\n", |
57b5ce07 LR |
2085 | rd->alpha2[0], rd->alpha2[1]); |
2086 | } | |
b2e1b302 | 2087 | } |
1a919318 | 2088 | |
8b60b078 | 2089 | print_dfs_region(rd->dfs_region); |
b2e1b302 LR |
2090 | print_rd_rules(rd); |
2091 | } | |
2092 | ||
2df78167 | 2093 | static void print_regdomain_info(const struct ieee80211_regdomain *rd) |
b2e1b302 | 2094 | { |
e9c0268f | 2095 | pr_info("Regulatory domain: %c%c\n", rd->alpha2[0], rd->alpha2[1]); |
b2e1b302 LR |
2096 | print_rd_rules(rd); |
2097 | } | |
2098 | ||
d2372b31 | 2099 | /* Takes ownership of rd only if it doesn't fail */ |
a3d2eaf0 | 2100 | static int __set_regdom(const struct ieee80211_regdomain *rd) |
b2e1b302 | 2101 | { |
e9763c3c | 2102 | const struct ieee80211_regdomain *regd; |
9c96477d | 2103 | const struct ieee80211_regdomain *intersected_rd = NULL; |
806a9e39 | 2104 | struct wiphy *request_wiphy; |
c492db37 | 2105 | struct regulatory_request *lr = get_last_request(); |
6913b49a | 2106 | |
b2e1b302 LR |
2107 | /* Some basic sanity checks first */ |
2108 | ||
6913b49a JB |
2109 | if (!reg_is_valid_request(rd->alpha2)) |
2110 | return -EINVAL; | |
2111 | ||
b2e1b302 | 2112 | if (is_world_regdom(rd->alpha2)) { |
b2e1b302 LR |
2113 | update_world_regdomain(rd); |
2114 | return 0; | |
2115 | } | |
b2e1b302 LR |
2116 | |
2117 | if (!is_alpha2_set(rd->alpha2) && !is_an_alpha2(rd->alpha2) && | |
1a919318 | 2118 | !is_unknown_alpha2(rd->alpha2)) |
b2e1b302 LR |
2119 | return -EINVAL; |
2120 | ||
fb1fc7ad LR |
2121 | /* |
2122 | * Lets only bother proceeding on the same alpha2 if the current | |
3f2355cb | 2123 | * rd is non static (it means CRDA was present and was used last) |
fb1fc7ad LR |
2124 | * and the pending request came in from a country IE |
2125 | */ | |
c492db37 | 2126 | if (lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE) { |
fb1fc7ad LR |
2127 | /* |
2128 | * If someone else asked us to change the rd lets only bother | |
2129 | * checking if the alpha2 changes if CRDA was already called | |
2130 | */ | |
baeb66fe | 2131 | if (!regdom_changes(rd->alpha2)) |
95908535 | 2132 | return -EALREADY; |
3f2355cb LR |
2133 | } |
2134 | ||
fb1fc7ad LR |
2135 | /* |
2136 | * Now lets set the regulatory domain, update all driver channels | |
b2e1b302 LR |
2137 | * and finally inform them of what we have done, in case they want |
2138 | * to review or adjust their own settings based on their own | |
fb1fc7ad LR |
2139 | * internal EEPROM data |
2140 | */ | |
b2e1b302 | 2141 | |
8375af3b | 2142 | if (!is_valid_rd(rd)) { |
e9c0268f | 2143 | pr_err("Invalid regulatory domain detected:\n"); |
8375af3b LR |
2144 | print_regdomain_info(rd); |
2145 | return -EINVAL; | |
b2e1b302 LR |
2146 | } |
2147 | ||
c492db37 | 2148 | request_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx); |
0bac71af | 2149 | if (!request_wiphy && |
c492db37 JB |
2150 | (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER || |
2151 | lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE)) { | |
0bac71af | 2152 | schedule_delayed_work(®_timeout, 0); |
de3584bd JB |
2153 | return -ENODEV; |
2154 | } | |
806a9e39 | 2155 | |
c492db37 JB |
2156 | if (!lr->intersect) { |
2157 | if (lr->initiator != NL80211_REGDOM_SET_BY_DRIVER) { | |
379b82f4 | 2158 | reset_regdomains(false, rd); |
3e0c3ff3 LR |
2159 | return 0; |
2160 | } | |
2161 | ||
fb1fc7ad LR |
2162 | /* |
2163 | * For a driver hint, lets copy the regulatory domain the | |
2164 | * driver wanted to the wiphy to deal with conflicts | |
2165 | */ | |
3e0c3ff3 | 2166 | |
558f6d32 LR |
2167 | /* |
2168 | * Userspace could have sent two replies with only | |
2169 | * one kernel request. | |
2170 | */ | |
2171 | if (request_wiphy->regd) | |
2172 | return -EALREADY; | |
3e0c3ff3 | 2173 | |
e9763c3c JB |
2174 | regd = reg_copy_regd(rd); |
2175 | if (IS_ERR(regd)) | |
2176 | return PTR_ERR(regd); | |
3e0c3ff3 | 2177 | |
458f4f9e | 2178 | rcu_assign_pointer(request_wiphy->regd, regd); |
379b82f4 | 2179 | reset_regdomains(false, rd); |
b8295acd LR |
2180 | return 0; |
2181 | } | |
2182 | ||
2183 | /* Intersection requires a bit more work */ | |
2184 | ||
c492db37 | 2185 | if (lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE) { |
458f4f9e | 2186 | intersected_rd = regdom_intersect(rd, get_cfg80211_regdom()); |
9c96477d LR |
2187 | if (!intersected_rd) |
2188 | return -EINVAL; | |
b8295acd | 2189 | |
fb1fc7ad LR |
2190 | /* |
2191 | * We can trash what CRDA provided now. | |
3e0c3ff3 | 2192 | * However if a driver requested this specific regulatory |
fb1fc7ad LR |
2193 | * domain we keep it for its private use |
2194 | */ | |
b7566fc3 LF |
2195 | if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER) { |
2196 | const struct ieee80211_regdomain *tmp; | |
2197 | ||
2198 | tmp = get_wiphy_regdom(request_wiphy); | |
458f4f9e | 2199 | rcu_assign_pointer(request_wiphy->regd, rd); |
b7566fc3 LF |
2200 | rcu_free_regdom(tmp); |
2201 | } else { | |
3e0c3ff3 | 2202 | kfree(rd); |
b7566fc3 | 2203 | } |
3e0c3ff3 | 2204 | |
b8295acd LR |
2205 | rd = NULL; |
2206 | ||
379b82f4 | 2207 | reset_regdomains(false, intersected_rd); |
b8295acd LR |
2208 | |
2209 | return 0; | |
9c96477d LR |
2210 | } |
2211 | ||
f3baed51 | 2212 | return -EINVAL; |
b2e1b302 LR |
2213 | } |
2214 | ||
2215 | ||
fb1fc7ad LR |
2216 | /* |
2217 | * Use this call to set the current regulatory domain. Conflicts with | |
b2e1b302 | 2218 | * multiple drivers can be ironed out later. Caller must've already |
458f4f9e | 2219 | * kmalloc'd the rd structure. |
fb1fc7ad | 2220 | */ |
a3d2eaf0 | 2221 | int set_regdom(const struct ieee80211_regdomain *rd) |
b2e1b302 | 2222 | { |
c492db37 | 2223 | struct regulatory_request *lr; |
b2e1b302 LR |
2224 | int r; |
2225 | ||
abc7381b | 2226 | mutex_lock(®_mutex); |
c492db37 | 2227 | lr = get_last_request(); |
abc7381b | 2228 | |
b2e1b302 LR |
2229 | /* Note that this doesn't update the wiphys, this is done below */ |
2230 | r = __set_regdom(rd); | |
d2372b31 | 2231 | if (r) { |
95908535 KV |
2232 | if (r == -EALREADY) |
2233 | reg_set_request_processed(); | |
2234 | ||
d2372b31 | 2235 | kfree(rd); |
fdc9d7b2 | 2236 | goto out; |
d2372b31 | 2237 | } |
b2e1b302 | 2238 | |
b2e1b302 | 2239 | /* This would make this whole thing pointless */ |
c492db37 | 2240 | if (WARN_ON(!lr->intersect && rd != get_cfg80211_regdom())) { |
fdc9d7b2 JB |
2241 | r = -EINVAL; |
2242 | goto out; | |
2243 | } | |
b2e1b302 LR |
2244 | |
2245 | /* update all wiphys now with the new established regulatory domain */ | |
c492db37 | 2246 | update_all_wiphy_regulatory(lr->initiator); |
b2e1b302 | 2247 | |
458f4f9e | 2248 | print_regdomain(get_cfg80211_regdom()); |
b2e1b302 | 2249 | |
c492db37 | 2250 | nl80211_send_reg_change_event(lr); |
73d54c9e | 2251 | |
b2e253cf LR |
2252 | reg_set_request_processed(); |
2253 | ||
fdc9d7b2 | 2254 | out: |
abc7381b LR |
2255 | mutex_unlock(®_mutex); |
2256 | ||
b2e1b302 LR |
2257 | return r; |
2258 | } | |
2259 | ||
4d9d88d1 SJR |
2260 | #ifdef CONFIG_HOTPLUG |
2261 | int reg_device_uevent(struct device *dev, struct kobj_uevent_env *env) | |
2262 | { | |
4a484cff JB |
2263 | struct regulatory_request *lr; |
2264 | u8 alpha2[2]; | |
2265 | bool add = false; | |
c492db37 | 2266 | |
4a484cff JB |
2267 | rcu_read_lock(); |
2268 | lr = get_last_request(); | |
c492db37 | 2269 | if (lr && !lr->processed) { |
4a484cff JB |
2270 | memcpy(alpha2, lr->alpha2, 2); |
2271 | add = true; | |
4d9d88d1 | 2272 | } |
4a484cff | 2273 | rcu_read_unlock(); |
4d9d88d1 | 2274 | |
4a484cff JB |
2275 | if (add) |
2276 | return add_uevent_var(env, "COUNTRY=%c%c", | |
2277 | alpha2[0], alpha2[1]); | |
4d9d88d1 SJR |
2278 | return 0; |
2279 | } | |
2280 | #else | |
2281 | int reg_device_uevent(struct device *dev, struct kobj_uevent_env *env) | |
2282 | { | |
2283 | return -ENODEV; | |
2284 | } | |
2285 | #endif /* CONFIG_HOTPLUG */ | |
2286 | ||
57b5ce07 LR |
2287 | void wiphy_regulatory_register(struct wiphy *wiphy) |
2288 | { | |
57b5ce07 LR |
2289 | mutex_lock(®_mutex); |
2290 | ||
2291 | if (!reg_dev_ignore_cell_hint(wiphy)) | |
2292 | reg_num_devs_support_basehint++; | |
2293 | ||
14cdf112 | 2294 | wiphy_update_regulatory(wiphy, NL80211_REGDOM_SET_BY_CORE); |
f8a1c774 | 2295 | |
14cdf112 | 2296 | mutex_unlock(®_mutex); |
57b5ce07 LR |
2297 | } |
2298 | ||
a1794390 | 2299 | /* Caller must hold cfg80211_mutex */ |
bfead080 | 2300 | void wiphy_regulatory_deregister(struct wiphy *wiphy) |
3f2355cb | 2301 | { |
0ad8acaf | 2302 | struct wiphy *request_wiphy = NULL; |
c492db37 | 2303 | struct regulatory_request *lr; |
806a9e39 | 2304 | |
abc7381b | 2305 | mutex_lock(®_mutex); |
c492db37 | 2306 | lr = get_last_request(); |
abc7381b | 2307 | |
57b5ce07 LR |
2308 | if (!reg_dev_ignore_cell_hint(wiphy)) |
2309 | reg_num_devs_support_basehint--; | |
2310 | ||
458f4f9e JB |
2311 | rcu_free_regdom(get_wiphy_regdom(wiphy)); |
2312 | rcu_assign_pointer(wiphy->regd, NULL); | |
0ef9ccdd | 2313 | |
c492db37 JB |
2314 | if (lr) |
2315 | request_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx); | |
806a9e39 | 2316 | |
0ef9ccdd | 2317 | if (!request_wiphy || request_wiphy != wiphy) |
abc7381b | 2318 | goto out; |
0ef9ccdd | 2319 | |
c492db37 JB |
2320 | lr->wiphy_idx = WIPHY_IDX_INVALID; |
2321 | lr->country_ie_env = ENVIRON_ANY; | |
abc7381b LR |
2322 | out: |
2323 | mutex_unlock(®_mutex); | |
3f2355cb LR |
2324 | } |
2325 | ||
a90c7a31 LR |
2326 | static void reg_timeout_work(struct work_struct *work) |
2327 | { | |
1a919318 | 2328 | REG_DBG_PRINT("Timeout while waiting for CRDA to reply, restoring regulatory settings\n"); |
a90c7a31 LR |
2329 | restore_regulatory_settings(true); |
2330 | } | |
2331 | ||
2fcc9f73 | 2332 | int __init regulatory_init(void) |
b2e1b302 | 2333 | { |
bcf4f99b | 2334 | int err = 0; |
734366de | 2335 | |
b2e1b302 LR |
2336 | reg_pdev = platform_device_register_simple("regulatory", 0, NULL, 0); |
2337 | if (IS_ERR(reg_pdev)) | |
2338 | return PTR_ERR(reg_pdev); | |
734366de | 2339 | |
4d9d88d1 SJR |
2340 | reg_pdev->dev.type = ®_device_type; |
2341 | ||
fe33eb39 | 2342 | spin_lock_init(®_requests_lock); |
e38f8a7a | 2343 | spin_lock_init(®_pending_beacons_lock); |
fe33eb39 | 2344 | |
80007efe LR |
2345 | reg_regdb_size_check(); |
2346 | ||
458f4f9e | 2347 | rcu_assign_pointer(cfg80211_regdomain, cfg80211_world_regdom); |
734366de | 2348 | |
09d989d1 LR |
2349 | user_alpha2[0] = '9'; |
2350 | user_alpha2[1] = '7'; | |
2351 | ||
ae9e4b0d | 2352 | /* We always try to get an update for the static regdomain */ |
458f4f9e | 2353 | err = regulatory_hint_core(cfg80211_world_regdom->alpha2); |
ba25c141 | 2354 | if (err) { |
bcf4f99b LR |
2355 | if (err == -ENOMEM) |
2356 | return err; | |
2357 | /* | |
2358 | * N.B. kobject_uevent_env() can fail mainly for when we're out | |
2359 | * memory which is handled and propagated appropriately above | |
2360 | * but it can also fail during a netlink_broadcast() or during | |
2361 | * early boot for call_usermodehelper(). For now treat these | |
2362 | * errors as non-fatal. | |
2363 | */ | |
e9c0268f | 2364 | pr_err("kobject_uevent_env() was unable to call CRDA during init\n"); |
bcf4f99b | 2365 | } |
734366de | 2366 | |
ae9e4b0d LR |
2367 | /* |
2368 | * Finally, if the user set the module parameter treat it | |
2369 | * as a user hint. | |
2370 | */ | |
2371 | if (!is_world_regdom(ieee80211_regdom)) | |
57b5ce07 LR |
2372 | regulatory_hint_user(ieee80211_regdom, |
2373 | NL80211_USER_REG_HINT_USER); | |
ae9e4b0d | 2374 | |
b2e1b302 LR |
2375 | return 0; |
2376 | } | |
2377 | ||
1a919318 | 2378 | void regulatory_exit(void) |
b2e1b302 | 2379 | { |
fe33eb39 | 2380 | struct regulatory_request *reg_request, *tmp; |
e38f8a7a | 2381 | struct reg_beacon *reg_beacon, *btmp; |
fe33eb39 LR |
2382 | |
2383 | cancel_work_sync(®_work); | |
a90c7a31 | 2384 | cancel_delayed_work_sync(®_timeout); |
fe33eb39 | 2385 | |
9027b149 | 2386 | /* Lock to suppress warnings */ |
abc7381b | 2387 | mutex_lock(®_mutex); |
379b82f4 | 2388 | reset_regdomains(true, NULL); |
9027b149 | 2389 | mutex_unlock(®_mutex); |
734366de | 2390 | |
58ebacc6 | 2391 | dev_set_uevent_suppress(®_pdev->dev, true); |
f6037d09 | 2392 | |
b2e1b302 | 2393 | platform_device_unregister(reg_pdev); |
734366de | 2394 | |
fea9bced JB |
2395 | list_for_each_entry_safe(reg_beacon, btmp, ®_pending_beacons, list) { |
2396 | list_del(®_beacon->list); | |
2397 | kfree(reg_beacon); | |
e38f8a7a | 2398 | } |
e38f8a7a | 2399 | |
fea9bced JB |
2400 | list_for_each_entry_safe(reg_beacon, btmp, ®_beacon_list, list) { |
2401 | list_del(®_beacon->list); | |
2402 | kfree(reg_beacon); | |
e38f8a7a LR |
2403 | } |
2404 | ||
fea9bced JB |
2405 | list_for_each_entry_safe(reg_request, tmp, ®_requests_list, list) { |
2406 | list_del(®_request->list); | |
2407 | kfree(reg_request); | |
fe33eb39 | 2408 | } |
8318d78a | 2409 | } |