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> |
2740f0cf | 6 | * Copyright 2013-2014 Intel Mobile Communications GmbH |
8318d78a | 7 | * |
3b77d5ec LR |
8 | * Permission to use, copy, modify, and/or distribute this software for any |
9 | * purpose with or without fee is hereby granted, provided that the above | |
10 | * copyright notice and this permission notice appear in all copies. | |
11 | * | |
12 | * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES | |
13 | * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF | |
14 | * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR | |
15 | * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES | |
16 | * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN | |
17 | * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF | |
18 | * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. | |
8318d78a JB |
19 | */ |
20 | ||
3b77d5ec | 21 | |
b2e1b302 LR |
22 | /** |
23 | * DOC: Wireless regulatory infrastructure | |
8318d78a JB |
24 | * |
25 | * The usual implementation is for a driver to read a device EEPROM to | |
26 | * determine which regulatory domain it should be operating under, then | |
27 | * looking up the allowable channels in a driver-local table and finally | |
28 | * registering those channels in the wiphy structure. | |
29 | * | |
b2e1b302 LR |
30 | * Another set of compliance enforcement is for drivers to use their |
31 | * own compliance limits which can be stored on the EEPROM. The host | |
32 | * driver or firmware may ensure these are used. | |
33 | * | |
34 | * In addition to all this we provide an extra layer of regulatory | |
35 | * conformance. For drivers which do not have any regulatory | |
36 | * information CRDA provides the complete regulatory solution. | |
37 | * For others it provides a community effort on further restrictions | |
38 | * to enhance compliance. | |
39 | * | |
40 | * Note: When number of rules --> infinity we will not be able to | |
41 | * index on alpha2 any more, instead we'll probably have to | |
42 | * rely on some SHA1 checksum of the regdomain for example. | |
43 | * | |
8318d78a | 44 | */ |
e9c0268f JP |
45 | |
46 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt | |
47 | ||
8318d78a | 48 | #include <linux/kernel.h> |
bc3b2d7f | 49 | #include <linux/export.h> |
5a0e3ad6 | 50 | #include <linux/slab.h> |
b2e1b302 | 51 | #include <linux/list.h> |
c61029c7 | 52 | #include <linux/ctype.h> |
b2e1b302 LR |
53 | #include <linux/nl80211.h> |
54 | #include <linux/platform_device.h> | |
d9b93842 | 55 | #include <linux/moduleparam.h> |
b2e1b302 | 56 | #include <net/cfg80211.h> |
8318d78a | 57 | #include "core.h" |
b2e1b302 | 58 | #include "reg.h" |
3b377ea9 | 59 | #include "regdb.h" |
73d54c9e | 60 | #include "nl80211.h" |
8318d78a | 61 | |
4113f751 | 62 | #ifdef CONFIG_CFG80211_REG_DEBUG |
12c5ffb5 JP |
63 | #define REG_DBG_PRINT(format, args...) \ |
64 | printk(KERN_DEBUG pr_fmt(format), ##args) | |
4113f751 | 65 | #else |
8271195e | 66 | #define REG_DBG_PRINT(args...) |
4113f751 LR |
67 | #endif |
68 | ||
52616f2b IP |
69 | /** |
70 | * enum reg_request_treatment - regulatory request treatment | |
71 | * | |
72 | * @REG_REQ_OK: continue processing the regulatory request | |
73 | * @REG_REQ_IGNORE: ignore the regulatory request | |
74 | * @REG_REQ_INTERSECT: the regulatory domain resulting from this request should | |
75 | * be intersected with the current one. | |
76 | * @REG_REQ_ALREADY_SET: the regulatory request will not change the current | |
77 | * regulatory settings, and no further processing is required. | |
78 | * @REG_REQ_USER_HINT_HANDLED: a non alpha2 user hint was handled and no | |
79 | * further processing is required, i.e., not need to update last_request | |
80 | * etc. This should be used for user hints that do not provide an alpha2 | |
81 | * but some other type of regulatory hint, i.e., indoor operation. | |
82 | */ | |
2f92212b JB |
83 | enum reg_request_treatment { |
84 | REG_REQ_OK, | |
85 | REG_REQ_IGNORE, | |
86 | REG_REQ_INTERSECT, | |
87 | REG_REQ_ALREADY_SET, | |
52616f2b | 88 | REG_REQ_USER_HINT_HANDLED, |
2f92212b JB |
89 | }; |
90 | ||
a042994d LR |
91 | static struct regulatory_request core_request_world = { |
92 | .initiator = NL80211_REGDOM_SET_BY_CORE, | |
93 | .alpha2[0] = '0', | |
94 | .alpha2[1] = '0', | |
95 | .intersect = false, | |
96 | .processed = true, | |
97 | .country_ie_env = ENVIRON_ANY, | |
98 | }; | |
99 | ||
38fd2143 JB |
100 | /* |
101 | * Receipt of information from last regulatory request, | |
102 | * protected by RTNL (and can be accessed with RCU protection) | |
103 | */ | |
c492db37 JB |
104 | static struct regulatory_request __rcu *last_request = |
105 | (void __rcu *)&core_request_world; | |
734366de | 106 | |
b2e1b302 LR |
107 | /* To trigger userspace events */ |
108 | static struct platform_device *reg_pdev; | |
8318d78a | 109 | |
fb1fc7ad LR |
110 | /* |
111 | * Central wireless core regulatory domains, we only need two, | |
734366de | 112 | * the current one and a world regulatory domain in case we have no |
e8da2bb4 | 113 | * information to give us an alpha2. |
38fd2143 | 114 | * (protected by RTNL, can be read under RCU) |
fb1fc7ad | 115 | */ |
458f4f9e | 116 | const struct ieee80211_regdomain __rcu *cfg80211_regdomain; |
734366de | 117 | |
57b5ce07 LR |
118 | /* |
119 | * Number of devices that registered to the core | |
120 | * that support cellular base station regulatory hints | |
38fd2143 | 121 | * (protected by RTNL) |
57b5ce07 LR |
122 | */ |
123 | static int reg_num_devs_support_basehint; | |
124 | ||
52616f2b IP |
125 | /* |
126 | * State variable indicating if the platform on which the devices | |
127 | * are attached is operating in an indoor environment. The state variable | |
128 | * is relevant for all registered devices. | |
129 | * (protected by RTNL) | |
130 | */ | |
131 | static bool reg_is_indoor; | |
132 | ||
458f4f9e JB |
133 | static const struct ieee80211_regdomain *get_cfg80211_regdom(void) |
134 | { | |
38fd2143 | 135 | return rtnl_dereference(cfg80211_regdomain); |
458f4f9e JB |
136 | } |
137 | ||
138 | static const struct ieee80211_regdomain *get_wiphy_regdom(struct wiphy *wiphy) | |
139 | { | |
38fd2143 | 140 | return rtnl_dereference(wiphy->regd); |
458f4f9e JB |
141 | } |
142 | ||
3ef121b5 LR |
143 | static const char *reg_dfs_region_str(enum nl80211_dfs_regions dfs_region) |
144 | { | |
145 | switch (dfs_region) { | |
146 | case NL80211_DFS_UNSET: | |
147 | return "unset"; | |
148 | case NL80211_DFS_FCC: | |
149 | return "FCC"; | |
150 | case NL80211_DFS_ETSI: | |
151 | return "ETSI"; | |
152 | case NL80211_DFS_JP: | |
153 | return "JP"; | |
154 | } | |
155 | return "Unknown"; | |
156 | } | |
157 | ||
6c474799 LR |
158 | enum nl80211_dfs_regions reg_get_dfs_region(struct wiphy *wiphy) |
159 | { | |
160 | const struct ieee80211_regdomain *regd = NULL; | |
161 | const struct ieee80211_regdomain *wiphy_regd = NULL; | |
162 | ||
163 | regd = get_cfg80211_regdom(); | |
164 | if (!wiphy) | |
165 | goto out; | |
166 | ||
167 | wiphy_regd = get_wiphy_regdom(wiphy); | |
168 | if (!wiphy_regd) | |
169 | goto out; | |
170 | ||
171 | if (wiphy_regd->dfs_region == regd->dfs_region) | |
172 | goto out; | |
173 | ||
174 | REG_DBG_PRINT("%s: device specific dfs_region " | |
175 | "(%s) disagrees with cfg80211's " | |
176 | "central dfs_region (%s)\n", | |
177 | dev_name(&wiphy->dev), | |
178 | reg_dfs_region_str(wiphy_regd->dfs_region), | |
179 | reg_dfs_region_str(regd->dfs_region)); | |
180 | ||
181 | out: | |
182 | return regd->dfs_region; | |
183 | } | |
184 | ||
458f4f9e JB |
185 | static void rcu_free_regdom(const struct ieee80211_regdomain *r) |
186 | { | |
187 | if (!r) | |
188 | return; | |
189 | kfree_rcu((struct ieee80211_regdomain *)r, rcu_head); | |
190 | } | |
191 | ||
c492db37 JB |
192 | static struct regulatory_request *get_last_request(void) |
193 | { | |
38fd2143 | 194 | return rcu_dereference_rtnl(last_request); |
c492db37 JB |
195 | } |
196 | ||
e38f8a7a | 197 | /* Used to queue up regulatory hints */ |
fe33eb39 LR |
198 | static LIST_HEAD(reg_requests_list); |
199 | static spinlock_t reg_requests_lock; | |
200 | ||
e38f8a7a LR |
201 | /* Used to queue up beacon hints for review */ |
202 | static LIST_HEAD(reg_pending_beacons); | |
203 | static spinlock_t reg_pending_beacons_lock; | |
204 | ||
205 | /* Used to keep track of processed beacon hints */ | |
206 | static LIST_HEAD(reg_beacon_list); | |
207 | ||
208 | struct reg_beacon { | |
209 | struct list_head list; | |
210 | struct ieee80211_channel chan; | |
211 | }; | |
212 | ||
f333a7a2 LR |
213 | static void reg_todo(struct work_struct *work); |
214 | static DECLARE_WORK(reg_work, reg_todo); | |
215 | ||
a90c7a31 LR |
216 | static void reg_timeout_work(struct work_struct *work); |
217 | static DECLARE_DELAYED_WORK(reg_timeout, reg_timeout_work); | |
218 | ||
734366de JB |
219 | /* We keep a static world regulatory domain in case of the absence of CRDA */ |
220 | static const struct ieee80211_regdomain world_regdom = { | |
90cdc6df | 221 | .n_reg_rules = 6, |
734366de JB |
222 | .alpha2 = "00", |
223 | .reg_rules = { | |
68798a62 LR |
224 | /* IEEE 802.11b/g, channels 1..11 */ |
225 | REG_RULE(2412-10, 2462+10, 40, 6, 20, 0), | |
43c771a1 JB |
226 | /* IEEE 802.11b/g, channels 12..13. */ |
227 | REG_RULE(2467-10, 2472+10, 40, 6, 20, | |
8fe02e16 | 228 | NL80211_RRF_NO_IR), |
611b6a82 LR |
229 | /* IEEE 802.11 channel 14 - Only JP enables |
230 | * this and for 802.11b only */ | |
231 | REG_RULE(2484-10, 2484+10, 20, 6, 20, | |
8fe02e16 | 232 | NL80211_RRF_NO_IR | |
611b6a82 LR |
233 | NL80211_RRF_NO_OFDM), |
234 | /* IEEE 802.11a, channel 36..48 */ | |
131a19bc | 235 | REG_RULE(5180-10, 5240+10, 160, 6, 20, |
8fe02e16 | 236 | NL80211_RRF_NO_IR), |
3fc71f77 | 237 | |
131a19bc JB |
238 | /* IEEE 802.11a, channel 52..64 - DFS required */ |
239 | REG_RULE(5260-10, 5320+10, 160, 6, 20, | |
8fe02e16 | 240 | NL80211_RRF_NO_IR | |
131a19bc JB |
241 | NL80211_RRF_DFS), |
242 | ||
243 | /* IEEE 802.11a, channel 100..144 - DFS required */ | |
244 | REG_RULE(5500-10, 5720+10, 160, 6, 20, | |
8fe02e16 | 245 | NL80211_RRF_NO_IR | |
131a19bc | 246 | NL80211_RRF_DFS), |
3fc71f77 LR |
247 | |
248 | /* IEEE 802.11a, channel 149..165 */ | |
8ab9d85c | 249 | REG_RULE(5745-10, 5825+10, 80, 6, 20, |
8fe02e16 | 250 | NL80211_RRF_NO_IR), |
90cdc6df VK |
251 | |
252 | /* IEEE 802.11ad (60gHz), channels 1..3 */ | |
253 | REG_RULE(56160+2160*1-1080, 56160+2160*3+1080, 2160, 0, 0, 0), | |
734366de JB |
254 | } |
255 | }; | |
256 | ||
38fd2143 | 257 | /* protected by RTNL */ |
a3d2eaf0 JB |
258 | static const struct ieee80211_regdomain *cfg80211_world_regdom = |
259 | &world_regdom; | |
734366de | 260 | |
6ee7d330 | 261 | static char *ieee80211_regdom = "00"; |
09d989d1 | 262 | static char user_alpha2[2]; |
6ee7d330 | 263 | |
734366de JB |
264 | module_param(ieee80211_regdom, charp, 0444); |
265 | MODULE_PARM_DESC(ieee80211_regdom, "IEEE 802.11 regulatory domain code"); | |
266 | ||
c888393b | 267 | static void reg_free_request(struct regulatory_request *request) |
5ad6ef5e | 268 | { |
c888393b AN |
269 | if (request != get_last_request()) |
270 | kfree(request); | |
271 | } | |
272 | ||
273 | static void reg_free_last_request(void) | |
274 | { | |
275 | struct regulatory_request *lr = get_last_request(); | |
276 | ||
5ad6ef5e LR |
277 | if (lr != &core_request_world && lr) |
278 | kfree_rcu(lr, rcu_head); | |
279 | } | |
280 | ||
05f1a3ea LR |
281 | static void reg_update_last_request(struct regulatory_request *request) |
282 | { | |
255e25b0 LR |
283 | struct regulatory_request *lr; |
284 | ||
285 | lr = get_last_request(); | |
286 | if (lr == request) | |
287 | return; | |
288 | ||
c888393b | 289 | reg_free_last_request(); |
05f1a3ea LR |
290 | rcu_assign_pointer(last_request, request); |
291 | } | |
292 | ||
379b82f4 JB |
293 | static void reset_regdomains(bool full_reset, |
294 | const struct ieee80211_regdomain *new_regdom) | |
734366de | 295 | { |
458f4f9e JB |
296 | const struct ieee80211_regdomain *r; |
297 | ||
38fd2143 | 298 | ASSERT_RTNL(); |
e8da2bb4 | 299 | |
458f4f9e JB |
300 | r = get_cfg80211_regdom(); |
301 | ||
942b25cf | 302 | /* avoid freeing static information or freeing something twice */ |
458f4f9e JB |
303 | if (r == cfg80211_world_regdom) |
304 | r = NULL; | |
942b25cf JB |
305 | if (cfg80211_world_regdom == &world_regdom) |
306 | cfg80211_world_regdom = NULL; | |
458f4f9e JB |
307 | if (r == &world_regdom) |
308 | r = NULL; | |
942b25cf | 309 | |
458f4f9e JB |
310 | rcu_free_regdom(r); |
311 | rcu_free_regdom(cfg80211_world_regdom); | |
734366de | 312 | |
a3d2eaf0 | 313 | cfg80211_world_regdom = &world_regdom; |
458f4f9e | 314 | rcu_assign_pointer(cfg80211_regdomain, new_regdom); |
a042994d LR |
315 | |
316 | if (!full_reset) | |
317 | return; | |
318 | ||
05f1a3ea | 319 | reg_update_last_request(&core_request_world); |
734366de JB |
320 | } |
321 | ||
fb1fc7ad LR |
322 | /* |
323 | * Dynamic world regulatory domain requested by the wireless | |
324 | * core upon initialization | |
325 | */ | |
a3d2eaf0 | 326 | static void update_world_regdomain(const struct ieee80211_regdomain *rd) |
734366de | 327 | { |
c492db37 | 328 | struct regulatory_request *lr; |
734366de | 329 | |
c492db37 JB |
330 | lr = get_last_request(); |
331 | ||
332 | WARN_ON(!lr); | |
734366de | 333 | |
379b82f4 | 334 | reset_regdomains(false, rd); |
734366de JB |
335 | |
336 | cfg80211_world_regdom = rd; | |
734366de | 337 | } |
734366de | 338 | |
a3d2eaf0 | 339 | bool is_world_regdom(const char *alpha2) |
b2e1b302 LR |
340 | { |
341 | if (!alpha2) | |
342 | return false; | |
1a919318 | 343 | return alpha2[0] == '0' && alpha2[1] == '0'; |
b2e1b302 | 344 | } |
8318d78a | 345 | |
a3d2eaf0 | 346 | static bool is_alpha2_set(const char *alpha2) |
b2e1b302 LR |
347 | { |
348 | if (!alpha2) | |
349 | return false; | |
1a919318 | 350 | return alpha2[0] && alpha2[1]; |
b2e1b302 | 351 | } |
8318d78a | 352 | |
a3d2eaf0 | 353 | static bool is_unknown_alpha2(const char *alpha2) |
b2e1b302 LR |
354 | { |
355 | if (!alpha2) | |
356 | return false; | |
fb1fc7ad LR |
357 | /* |
358 | * Special case where regulatory domain was built by driver | |
359 | * but a specific alpha2 cannot be determined | |
360 | */ | |
1a919318 | 361 | return alpha2[0] == '9' && alpha2[1] == '9'; |
b2e1b302 | 362 | } |
8318d78a | 363 | |
3f2355cb LR |
364 | static bool is_intersected_alpha2(const char *alpha2) |
365 | { | |
366 | if (!alpha2) | |
367 | return false; | |
fb1fc7ad LR |
368 | /* |
369 | * Special case where regulatory domain is the | |
3f2355cb | 370 | * result of an intersection between two regulatory domain |
fb1fc7ad LR |
371 | * structures |
372 | */ | |
1a919318 | 373 | return alpha2[0] == '9' && alpha2[1] == '8'; |
3f2355cb LR |
374 | } |
375 | ||
a3d2eaf0 | 376 | static bool is_an_alpha2(const char *alpha2) |
b2e1b302 LR |
377 | { |
378 | if (!alpha2) | |
379 | return false; | |
1a919318 | 380 | return isalpha(alpha2[0]) && isalpha(alpha2[1]); |
b2e1b302 | 381 | } |
8318d78a | 382 | |
a3d2eaf0 | 383 | static bool alpha2_equal(const char *alpha2_x, const char *alpha2_y) |
b2e1b302 LR |
384 | { |
385 | if (!alpha2_x || !alpha2_y) | |
386 | return false; | |
1a919318 | 387 | return alpha2_x[0] == alpha2_y[0] && alpha2_x[1] == alpha2_y[1]; |
b2e1b302 LR |
388 | } |
389 | ||
69b1572b | 390 | static bool regdom_changes(const char *alpha2) |
b2e1b302 | 391 | { |
458f4f9e | 392 | const struct ieee80211_regdomain *r = get_cfg80211_regdom(); |
761cf7ec | 393 | |
458f4f9e | 394 | if (!r) |
b2e1b302 | 395 | return true; |
458f4f9e | 396 | return !alpha2_equal(r->alpha2, alpha2); |
b2e1b302 LR |
397 | } |
398 | ||
09d989d1 LR |
399 | /* |
400 | * The NL80211_REGDOM_SET_BY_USER regdom alpha2 is cached, this lets | |
401 | * you know if a valid regulatory hint with NL80211_REGDOM_SET_BY_USER | |
402 | * has ever been issued. | |
403 | */ | |
404 | static bool is_user_regdom_saved(void) | |
405 | { | |
406 | if (user_alpha2[0] == '9' && user_alpha2[1] == '7') | |
407 | return false; | |
408 | ||
409 | /* This would indicate a mistake on the design */ | |
1a919318 | 410 | if (WARN(!is_world_regdom(user_alpha2) && !is_an_alpha2(user_alpha2), |
09d989d1 | 411 | "Unexpected user alpha2: %c%c\n", |
1a919318 | 412 | user_alpha2[0], user_alpha2[1])) |
09d989d1 LR |
413 | return false; |
414 | ||
415 | return true; | |
416 | } | |
417 | ||
e9763c3c JB |
418 | static const struct ieee80211_regdomain * |
419 | reg_copy_regd(const struct ieee80211_regdomain *src_regd) | |
3b377ea9 JL |
420 | { |
421 | struct ieee80211_regdomain *regd; | |
e9763c3c | 422 | int size_of_regd; |
3b377ea9 JL |
423 | unsigned int i; |
424 | ||
82f20856 JB |
425 | size_of_regd = |
426 | sizeof(struct ieee80211_regdomain) + | |
427 | src_regd->n_reg_rules * sizeof(struct ieee80211_reg_rule); | |
3b377ea9 JL |
428 | |
429 | regd = kzalloc(size_of_regd, GFP_KERNEL); | |
430 | if (!regd) | |
e9763c3c | 431 | return ERR_PTR(-ENOMEM); |
3b377ea9 JL |
432 | |
433 | memcpy(regd, src_regd, sizeof(struct ieee80211_regdomain)); | |
434 | ||
435 | for (i = 0; i < src_regd->n_reg_rules; i++) | |
436 | memcpy(®d->reg_rules[i], &src_regd->reg_rules[i], | |
e9763c3c | 437 | sizeof(struct ieee80211_reg_rule)); |
3b377ea9 | 438 | |
e9763c3c | 439 | return regd; |
3b377ea9 JL |
440 | } |
441 | ||
442 | #ifdef CONFIG_CFG80211_INTERNAL_REGDB | |
443 | struct reg_regdb_search_request { | |
444 | char alpha2[2]; | |
445 | struct list_head list; | |
446 | }; | |
447 | ||
448 | static LIST_HEAD(reg_regdb_search_list); | |
368d06f5 | 449 | static DEFINE_MUTEX(reg_regdb_search_mutex); |
3b377ea9 JL |
450 | |
451 | static void reg_regdb_search(struct work_struct *work) | |
452 | { | |
453 | struct reg_regdb_search_request *request; | |
e9763c3c JB |
454 | const struct ieee80211_regdomain *curdom, *regdom = NULL; |
455 | int i; | |
a85d0d7f | 456 | |
5fe231e8 | 457 | rtnl_lock(); |
3b377ea9 | 458 | |
368d06f5 | 459 | mutex_lock(®_regdb_search_mutex); |
3b377ea9 JL |
460 | while (!list_empty(®_regdb_search_list)) { |
461 | request = list_first_entry(®_regdb_search_list, | |
462 | struct reg_regdb_search_request, | |
463 | list); | |
464 | list_del(&request->list); | |
465 | ||
1a919318 | 466 | for (i = 0; i < reg_regdb_size; i++) { |
3b377ea9 JL |
467 | curdom = reg_regdb[i]; |
468 | ||
1a919318 | 469 | if (alpha2_equal(request->alpha2, curdom->alpha2)) { |
e9763c3c | 470 | regdom = reg_copy_regd(curdom); |
3b377ea9 JL |
471 | break; |
472 | } | |
473 | } | |
474 | ||
475 | kfree(request); | |
476 | } | |
368d06f5 | 477 | mutex_unlock(®_regdb_search_mutex); |
a85d0d7f | 478 | |
e9763c3c | 479 | if (!IS_ERR_OR_NULL(regdom)) |
a85d0d7f LR |
480 | set_regdom(regdom); |
481 | ||
5fe231e8 | 482 | rtnl_unlock(); |
3b377ea9 JL |
483 | } |
484 | ||
485 | static DECLARE_WORK(reg_regdb_work, reg_regdb_search); | |
486 | ||
487 | static void reg_regdb_query(const char *alpha2) | |
488 | { | |
489 | struct reg_regdb_search_request *request; | |
490 | ||
491 | if (!alpha2) | |
492 | return; | |
493 | ||
494 | request = kzalloc(sizeof(struct reg_regdb_search_request), GFP_KERNEL); | |
495 | if (!request) | |
496 | return; | |
497 | ||
498 | memcpy(request->alpha2, alpha2, 2); | |
499 | ||
368d06f5 | 500 | mutex_lock(®_regdb_search_mutex); |
3b377ea9 | 501 | list_add_tail(&request->list, ®_regdb_search_list); |
368d06f5 | 502 | mutex_unlock(®_regdb_search_mutex); |
3b377ea9 JL |
503 | |
504 | schedule_work(®_regdb_work); | |
505 | } | |
80007efe LR |
506 | |
507 | /* Feel free to add any other sanity checks here */ | |
508 | static void reg_regdb_size_check(void) | |
509 | { | |
510 | /* We should ideally BUILD_BUG_ON() but then random builds would fail */ | |
511 | WARN_ONCE(!reg_regdb_size, "db.txt is empty, you should update it..."); | |
512 | } | |
3b377ea9 | 513 | #else |
80007efe | 514 | static inline void reg_regdb_size_check(void) {} |
3b377ea9 JL |
515 | static inline void reg_regdb_query(const char *alpha2) {} |
516 | #endif /* CONFIG_CFG80211_INTERNAL_REGDB */ | |
517 | ||
fb1fc7ad LR |
518 | /* |
519 | * This lets us keep regulatory code which is updated on a regulatory | |
1226d258 | 520 | * basis in userspace. |
fb1fc7ad | 521 | */ |
b2e1b302 LR |
522 | static int call_crda(const char *alpha2) |
523 | { | |
1226d258 JB |
524 | char country[12]; |
525 | char *env[] = { country, NULL }; | |
526 | ||
527 | snprintf(country, sizeof(country), "COUNTRY=%c%c", | |
528 | alpha2[0], alpha2[1]); | |
529 | ||
b2e1b302 | 530 | if (!is_world_regdom((char *) alpha2)) |
e9c0268f | 531 | pr_info("Calling CRDA for country: %c%c\n", |
b2e1b302 LR |
532 | alpha2[0], alpha2[1]); |
533 | else | |
e9c0268f | 534 | pr_info("Calling CRDA to update world regulatory domain\n"); |
b2e1b302 | 535 | |
3b377ea9 JL |
536 | /* query internal regulatory database (if it exists) */ |
537 | reg_regdb_query(alpha2); | |
538 | ||
1226d258 | 539 | return kobject_uevent_env(®_pdev->dev.kobj, KOBJ_CHANGE, env); |
b2e1b302 LR |
540 | } |
541 | ||
fe6631ff LR |
542 | static enum reg_request_treatment |
543 | reg_call_crda(struct regulatory_request *request) | |
544 | { | |
545 | if (call_crda(request->alpha2)) | |
546 | return REG_REQ_IGNORE; | |
547 | return REG_REQ_OK; | |
548 | } | |
549 | ||
e438768f | 550 | bool reg_is_valid_request(const char *alpha2) |
b2e1b302 | 551 | { |
c492db37 | 552 | struct regulatory_request *lr = get_last_request(); |
61405e97 | 553 | |
c492db37 | 554 | if (!lr || lr->processed) |
f6037d09 JB |
555 | return false; |
556 | ||
c492db37 | 557 | return alpha2_equal(lr->alpha2, alpha2); |
b2e1b302 | 558 | } |
8318d78a | 559 | |
e3961af1 JD |
560 | static const struct ieee80211_regdomain *reg_get_regdomain(struct wiphy *wiphy) |
561 | { | |
562 | struct regulatory_request *lr = get_last_request(); | |
563 | ||
564 | /* | |
565 | * Follow the driver's regulatory domain, if present, unless a country | |
566 | * IE has been processed or a user wants to help complaince further | |
567 | */ | |
568 | if (lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && | |
569 | lr->initiator != NL80211_REGDOM_SET_BY_USER && | |
570 | wiphy->regd) | |
571 | return get_wiphy_regdom(wiphy); | |
572 | ||
573 | return get_cfg80211_regdom(); | |
574 | } | |
575 | ||
a6d4a534 AN |
576 | static unsigned int |
577 | reg_get_max_bandwidth_from_range(const struct ieee80211_regdomain *rd, | |
578 | const struct ieee80211_reg_rule *rule) | |
97524820 JD |
579 | { |
580 | const struct ieee80211_freq_range *freq_range = &rule->freq_range; | |
581 | const struct ieee80211_freq_range *freq_range_tmp; | |
582 | const struct ieee80211_reg_rule *tmp; | |
583 | u32 start_freq, end_freq, idx, no; | |
584 | ||
585 | for (idx = 0; idx < rd->n_reg_rules; idx++) | |
586 | if (rule == &rd->reg_rules[idx]) | |
587 | break; | |
588 | ||
589 | if (idx == rd->n_reg_rules) | |
590 | return 0; | |
591 | ||
592 | /* get start_freq */ | |
593 | no = idx; | |
594 | ||
595 | while (no) { | |
596 | tmp = &rd->reg_rules[--no]; | |
597 | freq_range_tmp = &tmp->freq_range; | |
598 | ||
599 | if (freq_range_tmp->end_freq_khz < freq_range->start_freq_khz) | |
600 | break; | |
601 | ||
97524820 JD |
602 | freq_range = freq_range_tmp; |
603 | } | |
604 | ||
605 | start_freq = freq_range->start_freq_khz; | |
606 | ||
607 | /* get end_freq */ | |
608 | freq_range = &rule->freq_range; | |
609 | no = idx; | |
610 | ||
611 | while (no < rd->n_reg_rules - 1) { | |
612 | tmp = &rd->reg_rules[++no]; | |
613 | freq_range_tmp = &tmp->freq_range; | |
614 | ||
615 | if (freq_range_tmp->start_freq_khz > freq_range->end_freq_khz) | |
616 | break; | |
617 | ||
97524820 JD |
618 | freq_range = freq_range_tmp; |
619 | } | |
620 | ||
621 | end_freq = freq_range->end_freq_khz; | |
622 | ||
623 | return end_freq - start_freq; | |
624 | } | |
625 | ||
a6d4a534 AN |
626 | unsigned int reg_get_max_bandwidth(const struct ieee80211_regdomain *rd, |
627 | const struct ieee80211_reg_rule *rule) | |
628 | { | |
629 | unsigned int bw = reg_get_max_bandwidth_from_range(rd, rule); | |
630 | ||
631 | if (rule->flags & NL80211_RRF_NO_160MHZ) | |
632 | bw = min_t(unsigned int, bw, MHZ_TO_KHZ(80)); | |
633 | if (rule->flags & NL80211_RRF_NO_80MHZ) | |
634 | bw = min_t(unsigned int, bw, MHZ_TO_KHZ(40)); | |
635 | ||
636 | /* | |
637 | * HT40+/HT40- limits are handled per-channel. Only limit BW if both | |
638 | * are not allowed. | |
639 | */ | |
640 | if (rule->flags & NL80211_RRF_NO_HT40MINUS && | |
641 | rule->flags & NL80211_RRF_NO_HT40PLUS) | |
642 | bw = min_t(unsigned int, bw, MHZ_TO_KHZ(20)); | |
643 | ||
644 | return bw; | |
645 | } | |
646 | ||
b2e1b302 | 647 | /* Sanity check on a regulatory rule */ |
a3d2eaf0 | 648 | static bool is_valid_reg_rule(const struct ieee80211_reg_rule *rule) |
8318d78a | 649 | { |
a3d2eaf0 | 650 | const struct ieee80211_freq_range *freq_range = &rule->freq_range; |
b2e1b302 LR |
651 | u32 freq_diff; |
652 | ||
91e99004 | 653 | if (freq_range->start_freq_khz <= 0 || freq_range->end_freq_khz <= 0) |
b2e1b302 LR |
654 | return false; |
655 | ||
656 | if (freq_range->start_freq_khz > freq_range->end_freq_khz) | |
657 | return false; | |
658 | ||
659 | freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz; | |
660 | ||
bd05f28e | 661 | if (freq_range->end_freq_khz <= freq_range->start_freq_khz || |
1a919318 | 662 | freq_range->max_bandwidth_khz > freq_diff) |
b2e1b302 LR |
663 | return false; |
664 | ||
665 | return true; | |
666 | } | |
667 | ||
a3d2eaf0 | 668 | static bool is_valid_rd(const struct ieee80211_regdomain *rd) |
b2e1b302 | 669 | { |
a3d2eaf0 | 670 | const struct ieee80211_reg_rule *reg_rule = NULL; |
b2e1b302 | 671 | unsigned int i; |
8318d78a | 672 | |
b2e1b302 LR |
673 | if (!rd->n_reg_rules) |
674 | return false; | |
8318d78a | 675 | |
88dc1c3f LR |
676 | if (WARN_ON(rd->n_reg_rules > NL80211_MAX_SUPP_REG_RULES)) |
677 | return false; | |
678 | ||
b2e1b302 LR |
679 | for (i = 0; i < rd->n_reg_rules; i++) { |
680 | reg_rule = &rd->reg_rules[i]; | |
681 | if (!is_valid_reg_rule(reg_rule)) | |
682 | return false; | |
683 | } | |
684 | ||
685 | return true; | |
8318d78a JB |
686 | } |
687 | ||
038659e7 | 688 | static bool reg_does_bw_fit(const struct ieee80211_freq_range *freq_range, |
fe7ef5e9 | 689 | u32 center_freq_khz, u32 bw_khz) |
b2e1b302 | 690 | { |
038659e7 LR |
691 | u32 start_freq_khz, end_freq_khz; |
692 | ||
693 | start_freq_khz = center_freq_khz - (bw_khz/2); | |
694 | end_freq_khz = center_freq_khz + (bw_khz/2); | |
695 | ||
696 | if (start_freq_khz >= freq_range->start_freq_khz && | |
697 | end_freq_khz <= freq_range->end_freq_khz) | |
698 | return true; | |
699 | ||
700 | return false; | |
b2e1b302 | 701 | } |
8318d78a | 702 | |
0c7dc45d LR |
703 | /** |
704 | * freq_in_rule_band - tells us if a frequency is in a frequency band | |
705 | * @freq_range: frequency rule we want to query | |
706 | * @freq_khz: frequency we are inquiring about | |
707 | * | |
708 | * This lets us know if a specific frequency rule is or is not relevant to | |
709 | * a specific frequency's band. Bands are device specific and artificial | |
64629b9d VK |
710 | * definitions (the "2.4 GHz band", the "5 GHz band" and the "60GHz band"), |
711 | * however it is safe for now to assume that a frequency rule should not be | |
712 | * part of a frequency's band if the start freq or end freq are off by more | |
713 | * than 2 GHz for the 2.4 and 5 GHz bands, and by more than 10 GHz for the | |
714 | * 60 GHz band. | |
0c7dc45d LR |
715 | * This resolution can be lowered and should be considered as we add |
716 | * regulatory rule support for other "bands". | |
717 | **/ | |
718 | static bool freq_in_rule_band(const struct ieee80211_freq_range *freq_range, | |
1a919318 | 719 | u32 freq_khz) |
0c7dc45d LR |
720 | { |
721 | #define ONE_GHZ_IN_KHZ 1000000 | |
64629b9d VK |
722 | /* |
723 | * From 802.11ad: directional multi-gigabit (DMG): | |
724 | * Pertaining to operation in a frequency band containing a channel | |
725 | * with the Channel starting frequency above 45 GHz. | |
726 | */ | |
727 | u32 limit = freq_khz > 45 * ONE_GHZ_IN_KHZ ? | |
728 | 10 * ONE_GHZ_IN_KHZ : 2 * ONE_GHZ_IN_KHZ; | |
729 | if (abs(freq_khz - freq_range->start_freq_khz) <= limit) | |
0c7dc45d | 730 | return true; |
64629b9d | 731 | if (abs(freq_khz - freq_range->end_freq_khz) <= limit) |
0c7dc45d LR |
732 | return true; |
733 | return false; | |
734 | #undef ONE_GHZ_IN_KHZ | |
735 | } | |
736 | ||
adbfb058 LR |
737 | /* |
738 | * Later on we can perhaps use the more restrictive DFS | |
739 | * region but we don't have information for that yet so | |
740 | * for now simply disallow conflicts. | |
741 | */ | |
742 | static enum nl80211_dfs_regions | |
743 | reg_intersect_dfs_region(const enum nl80211_dfs_regions dfs_region1, | |
744 | const enum nl80211_dfs_regions dfs_region2) | |
745 | { | |
746 | if (dfs_region1 != dfs_region2) | |
747 | return NL80211_DFS_UNSET; | |
748 | return dfs_region1; | |
749 | } | |
750 | ||
fb1fc7ad LR |
751 | /* |
752 | * Helper for regdom_intersect(), this does the real | |
753 | * mathematical intersection fun | |
754 | */ | |
97524820 JD |
755 | static int reg_rules_intersect(const struct ieee80211_regdomain *rd1, |
756 | const struct ieee80211_regdomain *rd2, | |
757 | const struct ieee80211_reg_rule *rule1, | |
1a919318 JB |
758 | const struct ieee80211_reg_rule *rule2, |
759 | struct ieee80211_reg_rule *intersected_rule) | |
9c96477d LR |
760 | { |
761 | const struct ieee80211_freq_range *freq_range1, *freq_range2; | |
762 | struct ieee80211_freq_range *freq_range; | |
763 | const struct ieee80211_power_rule *power_rule1, *power_rule2; | |
764 | struct ieee80211_power_rule *power_rule; | |
97524820 | 765 | u32 freq_diff, max_bandwidth1, max_bandwidth2; |
9c96477d LR |
766 | |
767 | freq_range1 = &rule1->freq_range; | |
768 | freq_range2 = &rule2->freq_range; | |
769 | freq_range = &intersected_rule->freq_range; | |
770 | ||
771 | power_rule1 = &rule1->power_rule; | |
772 | power_rule2 = &rule2->power_rule; | |
773 | power_rule = &intersected_rule->power_rule; | |
774 | ||
775 | freq_range->start_freq_khz = max(freq_range1->start_freq_khz, | |
1a919318 | 776 | freq_range2->start_freq_khz); |
9c96477d | 777 | freq_range->end_freq_khz = min(freq_range1->end_freq_khz, |
1a919318 | 778 | freq_range2->end_freq_khz); |
97524820 JD |
779 | |
780 | max_bandwidth1 = freq_range1->max_bandwidth_khz; | |
781 | max_bandwidth2 = freq_range2->max_bandwidth_khz; | |
782 | ||
b0dfd2ea JD |
783 | if (rule1->flags & NL80211_RRF_AUTO_BW) |
784 | max_bandwidth1 = reg_get_max_bandwidth(rd1, rule1); | |
785 | if (rule2->flags & NL80211_RRF_AUTO_BW) | |
786 | max_bandwidth2 = reg_get_max_bandwidth(rd2, rule2); | |
97524820 JD |
787 | |
788 | freq_range->max_bandwidth_khz = min(max_bandwidth1, max_bandwidth2); | |
9c96477d | 789 | |
b0dfd2ea JD |
790 | intersected_rule->flags = rule1->flags | rule2->flags; |
791 | ||
792 | /* | |
793 | * In case NL80211_RRF_AUTO_BW requested for both rules | |
794 | * set AUTO_BW in intersected rule also. Next we will | |
795 | * calculate BW correctly in handle_channel function. | |
796 | * In other case remove AUTO_BW flag while we calculate | |
797 | * maximum bandwidth correctly and auto calculation is | |
798 | * not required. | |
799 | */ | |
800 | if ((rule1->flags & NL80211_RRF_AUTO_BW) && | |
801 | (rule2->flags & NL80211_RRF_AUTO_BW)) | |
802 | intersected_rule->flags |= NL80211_RRF_AUTO_BW; | |
803 | else | |
804 | intersected_rule->flags &= ~NL80211_RRF_AUTO_BW; | |
805 | ||
9c96477d LR |
806 | freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz; |
807 | if (freq_range->max_bandwidth_khz > freq_diff) | |
808 | freq_range->max_bandwidth_khz = freq_diff; | |
809 | ||
810 | power_rule->max_eirp = min(power_rule1->max_eirp, | |
811 | power_rule2->max_eirp); | |
812 | power_rule->max_antenna_gain = min(power_rule1->max_antenna_gain, | |
813 | power_rule2->max_antenna_gain); | |
814 | ||
089027e5 JD |
815 | intersected_rule->dfs_cac_ms = max(rule1->dfs_cac_ms, |
816 | rule2->dfs_cac_ms); | |
817 | ||
9c96477d LR |
818 | if (!is_valid_reg_rule(intersected_rule)) |
819 | return -EINVAL; | |
820 | ||
821 | return 0; | |
822 | } | |
823 | ||
a62a1aed EP |
824 | /* check whether old rule contains new rule */ |
825 | static bool rule_contains(struct ieee80211_reg_rule *r1, | |
826 | struct ieee80211_reg_rule *r2) | |
827 | { | |
828 | /* for simplicity, currently consider only same flags */ | |
829 | if (r1->flags != r2->flags) | |
830 | return false; | |
831 | ||
832 | /* verify r1 is more restrictive */ | |
833 | if ((r1->power_rule.max_antenna_gain > | |
834 | r2->power_rule.max_antenna_gain) || | |
835 | r1->power_rule.max_eirp > r2->power_rule.max_eirp) | |
836 | return false; | |
837 | ||
838 | /* make sure r2's range is contained within r1 */ | |
839 | if (r1->freq_range.start_freq_khz > r2->freq_range.start_freq_khz || | |
840 | r1->freq_range.end_freq_khz < r2->freq_range.end_freq_khz) | |
841 | return false; | |
842 | ||
843 | /* and finally verify that r1.max_bw >= r2.max_bw */ | |
844 | if (r1->freq_range.max_bandwidth_khz < | |
845 | r2->freq_range.max_bandwidth_khz) | |
846 | return false; | |
847 | ||
848 | return true; | |
849 | } | |
850 | ||
851 | /* add or extend current rules. do nothing if rule is already contained */ | |
852 | static void add_rule(struct ieee80211_reg_rule *rule, | |
853 | struct ieee80211_reg_rule *reg_rules, u32 *n_rules) | |
854 | { | |
855 | struct ieee80211_reg_rule *tmp_rule; | |
856 | int i; | |
857 | ||
858 | for (i = 0; i < *n_rules; i++) { | |
859 | tmp_rule = ®_rules[i]; | |
860 | /* rule is already contained - do nothing */ | |
861 | if (rule_contains(tmp_rule, rule)) | |
862 | return; | |
863 | ||
864 | /* extend rule if possible */ | |
865 | if (rule_contains(rule, tmp_rule)) { | |
866 | memcpy(tmp_rule, rule, sizeof(*rule)); | |
867 | return; | |
868 | } | |
869 | } | |
870 | ||
871 | memcpy(®_rules[*n_rules], rule, sizeof(*rule)); | |
872 | (*n_rules)++; | |
873 | } | |
874 | ||
9c96477d LR |
875 | /** |
876 | * regdom_intersect - do the intersection between two regulatory domains | |
877 | * @rd1: first regulatory domain | |
878 | * @rd2: second regulatory domain | |
879 | * | |
880 | * Use this function to get the intersection between two regulatory domains. | |
881 | * Once completed we will mark the alpha2 for the rd as intersected, "98", | |
882 | * as no one single alpha2 can represent this regulatory domain. | |
883 | * | |
884 | * Returns a pointer to the regulatory domain structure which will hold the | |
885 | * resulting intersection of rules between rd1 and rd2. We will | |
886 | * kzalloc() this structure for you. | |
887 | */ | |
1a919318 JB |
888 | static struct ieee80211_regdomain * |
889 | regdom_intersect(const struct ieee80211_regdomain *rd1, | |
890 | const struct ieee80211_regdomain *rd2) | |
9c96477d LR |
891 | { |
892 | int r, size_of_regd; | |
893 | unsigned int x, y; | |
a62a1aed | 894 | unsigned int num_rules = 0; |
9c96477d | 895 | const struct ieee80211_reg_rule *rule1, *rule2; |
a62a1aed | 896 | struct ieee80211_reg_rule intersected_rule; |
9c96477d | 897 | struct ieee80211_regdomain *rd; |
9c96477d LR |
898 | |
899 | if (!rd1 || !rd2) | |
900 | return NULL; | |
901 | ||
fb1fc7ad LR |
902 | /* |
903 | * First we get a count of the rules we'll need, then we actually | |
9c96477d LR |
904 | * build them. This is to so we can malloc() and free() a |
905 | * regdomain once. The reason we use reg_rules_intersect() here | |
906 | * is it will return -EINVAL if the rule computed makes no sense. | |
fb1fc7ad LR |
907 | * All rules that do check out OK are valid. |
908 | */ | |
9c96477d LR |
909 | |
910 | for (x = 0; x < rd1->n_reg_rules; x++) { | |
911 | rule1 = &rd1->reg_rules[x]; | |
912 | for (y = 0; y < rd2->n_reg_rules; y++) { | |
913 | rule2 = &rd2->reg_rules[y]; | |
97524820 | 914 | if (!reg_rules_intersect(rd1, rd2, rule1, rule2, |
a62a1aed | 915 | &intersected_rule)) |
9c96477d | 916 | num_rules++; |
9c96477d LR |
917 | } |
918 | } | |
919 | ||
920 | if (!num_rules) | |
921 | return NULL; | |
922 | ||
923 | size_of_regd = sizeof(struct ieee80211_regdomain) + | |
82f20856 | 924 | num_rules * sizeof(struct ieee80211_reg_rule); |
9c96477d LR |
925 | |
926 | rd = kzalloc(size_of_regd, GFP_KERNEL); | |
927 | if (!rd) | |
928 | return NULL; | |
929 | ||
a62a1aed | 930 | for (x = 0; x < rd1->n_reg_rules; x++) { |
9c96477d | 931 | rule1 = &rd1->reg_rules[x]; |
a62a1aed | 932 | for (y = 0; y < rd2->n_reg_rules; y++) { |
9c96477d | 933 | rule2 = &rd2->reg_rules[y]; |
97524820 | 934 | r = reg_rules_intersect(rd1, rd2, rule1, rule2, |
a62a1aed | 935 | &intersected_rule); |
fb1fc7ad LR |
936 | /* |
937 | * No need to memset here the intersected rule here as | |
938 | * we're not using the stack anymore | |
939 | */ | |
9c96477d LR |
940 | if (r) |
941 | continue; | |
9c96477d | 942 | |
a62a1aed EP |
943 | add_rule(&intersected_rule, rd->reg_rules, |
944 | &rd->n_reg_rules); | |
945 | } | |
9c96477d LR |
946 | } |
947 | ||
9c96477d LR |
948 | rd->alpha2[0] = '9'; |
949 | rd->alpha2[1] = '8'; | |
adbfb058 LR |
950 | rd->dfs_region = reg_intersect_dfs_region(rd1->dfs_region, |
951 | rd2->dfs_region); | |
9c96477d LR |
952 | |
953 | return rd; | |
954 | } | |
955 | ||
fb1fc7ad LR |
956 | /* |
957 | * XXX: add support for the rest of enum nl80211_reg_rule_flags, we may | |
958 | * want to just have the channel structure use these | |
959 | */ | |
b2e1b302 LR |
960 | static u32 map_regdom_flags(u32 rd_flags) |
961 | { | |
962 | u32 channel_flags = 0; | |
8fe02e16 LR |
963 | if (rd_flags & NL80211_RRF_NO_IR_ALL) |
964 | channel_flags |= IEEE80211_CHAN_NO_IR; | |
b2e1b302 LR |
965 | if (rd_flags & NL80211_RRF_DFS) |
966 | channel_flags |= IEEE80211_CHAN_RADAR; | |
03f6b084 SF |
967 | if (rd_flags & NL80211_RRF_NO_OFDM) |
968 | channel_flags |= IEEE80211_CHAN_NO_OFDM; | |
570dbde1 DS |
969 | if (rd_flags & NL80211_RRF_NO_OUTDOOR) |
970 | channel_flags |= IEEE80211_CHAN_INDOOR_ONLY; | |
a6d4a534 AN |
971 | if (rd_flags & NL80211_RRF_GO_CONCURRENT) |
972 | channel_flags |= IEEE80211_CHAN_GO_CONCURRENT; | |
973 | if (rd_flags & NL80211_RRF_NO_HT40MINUS) | |
974 | channel_flags |= IEEE80211_CHAN_NO_HT40MINUS; | |
975 | if (rd_flags & NL80211_RRF_NO_HT40PLUS) | |
976 | channel_flags |= IEEE80211_CHAN_NO_HT40PLUS; | |
977 | if (rd_flags & NL80211_RRF_NO_80MHZ) | |
978 | channel_flags |= IEEE80211_CHAN_NO_80MHZ; | |
979 | if (rd_flags & NL80211_RRF_NO_160MHZ) | |
980 | channel_flags |= IEEE80211_CHAN_NO_160MHZ; | |
b2e1b302 LR |
981 | return channel_flags; |
982 | } | |
983 | ||
361c9c8b JB |
984 | static const struct ieee80211_reg_rule * |
985 | freq_reg_info_regd(struct wiphy *wiphy, u32 center_freq, | |
986 | const struct ieee80211_regdomain *regd) | |
8318d78a JB |
987 | { |
988 | int i; | |
0c7dc45d | 989 | bool band_rule_found = false; |
038659e7 LR |
990 | bool bw_fits = false; |
991 | ||
3e0c3ff3 | 992 | if (!regd) |
361c9c8b | 993 | return ERR_PTR(-EINVAL); |
b2e1b302 | 994 | |
3e0c3ff3 | 995 | for (i = 0; i < regd->n_reg_rules; i++) { |
b2e1b302 LR |
996 | const struct ieee80211_reg_rule *rr; |
997 | const struct ieee80211_freq_range *fr = NULL; | |
b2e1b302 | 998 | |
3e0c3ff3 | 999 | rr = ®d->reg_rules[i]; |
b2e1b302 | 1000 | fr = &rr->freq_range; |
0c7dc45d | 1001 | |
fb1fc7ad LR |
1002 | /* |
1003 | * We only need to know if one frequency rule was | |
0c7dc45d | 1004 | * was in center_freq's band, that's enough, so lets |
fb1fc7ad LR |
1005 | * not overwrite it once found |
1006 | */ | |
0c7dc45d LR |
1007 | if (!band_rule_found) |
1008 | band_rule_found = freq_in_rule_band(fr, center_freq); | |
1009 | ||
e33e2241 | 1010 | bw_fits = reg_does_bw_fit(fr, center_freq, MHZ_TO_KHZ(20)); |
0c7dc45d | 1011 | |
361c9c8b JB |
1012 | if (band_rule_found && bw_fits) |
1013 | return rr; | |
8318d78a JB |
1014 | } |
1015 | ||
0c7dc45d | 1016 | if (!band_rule_found) |
361c9c8b | 1017 | return ERR_PTR(-ERANGE); |
0c7dc45d | 1018 | |
361c9c8b | 1019 | return ERR_PTR(-EINVAL); |
b2e1b302 LR |
1020 | } |
1021 | ||
361c9c8b JB |
1022 | const struct ieee80211_reg_rule *freq_reg_info(struct wiphy *wiphy, |
1023 | u32 center_freq) | |
1fa25e41 | 1024 | { |
5d885b99 | 1025 | const struct ieee80211_regdomain *regd; |
1a919318 | 1026 | |
e3961af1 | 1027 | regd = reg_get_regdomain(wiphy); |
5d885b99 | 1028 | |
361c9c8b | 1029 | return freq_reg_info_regd(wiphy, center_freq, regd); |
1fa25e41 | 1030 | } |
4f366c5d | 1031 | EXPORT_SYMBOL(freq_reg_info); |
b2e1b302 | 1032 | |
034c6d6e | 1033 | const char *reg_initiator_name(enum nl80211_reg_initiator initiator) |
926a0a09 LR |
1034 | { |
1035 | switch (initiator) { | |
1036 | case NL80211_REGDOM_SET_BY_CORE: | |
034c6d6e | 1037 | return "core"; |
926a0a09 | 1038 | case NL80211_REGDOM_SET_BY_USER: |
034c6d6e | 1039 | return "user"; |
926a0a09 | 1040 | case NL80211_REGDOM_SET_BY_DRIVER: |
034c6d6e | 1041 | return "driver"; |
926a0a09 | 1042 | case NL80211_REGDOM_SET_BY_COUNTRY_IE: |
034c6d6e | 1043 | return "country IE"; |
926a0a09 LR |
1044 | default: |
1045 | WARN_ON(1); | |
034c6d6e | 1046 | return "bug"; |
926a0a09 LR |
1047 | } |
1048 | } | |
034c6d6e | 1049 | EXPORT_SYMBOL(reg_initiator_name); |
e702d3cf | 1050 | |
034c6d6e | 1051 | #ifdef CONFIG_CFG80211_REG_DEBUG |
b0dfd2ea JD |
1052 | static void chan_reg_rule_print_dbg(const struct ieee80211_regdomain *regd, |
1053 | struct ieee80211_channel *chan, | |
e702d3cf LR |
1054 | const struct ieee80211_reg_rule *reg_rule) |
1055 | { | |
1056 | const struct ieee80211_power_rule *power_rule; | |
1057 | const struct ieee80211_freq_range *freq_range; | |
b0dfd2ea | 1058 | char max_antenna_gain[32], bw[32]; |
e702d3cf LR |
1059 | |
1060 | power_rule = ®_rule->power_rule; | |
1061 | freq_range = ®_rule->freq_range; | |
1062 | ||
1063 | if (!power_rule->max_antenna_gain) | |
b0dfd2ea | 1064 | snprintf(max_antenna_gain, sizeof(max_antenna_gain), "N/A"); |
e702d3cf | 1065 | else |
b0dfd2ea JD |
1066 | snprintf(max_antenna_gain, sizeof(max_antenna_gain), "%d", |
1067 | power_rule->max_antenna_gain); | |
1068 | ||
1069 | if (reg_rule->flags & NL80211_RRF_AUTO_BW) | |
1070 | snprintf(bw, sizeof(bw), "%d KHz, %d KHz AUTO", | |
1071 | freq_range->max_bandwidth_khz, | |
1072 | reg_get_max_bandwidth(regd, reg_rule)); | |
1073 | else | |
1074 | snprintf(bw, sizeof(bw), "%d KHz", | |
1075 | freq_range->max_bandwidth_khz); | |
e702d3cf | 1076 | |
fe7ef5e9 JB |
1077 | REG_DBG_PRINT("Updating information on frequency %d MHz with regulatory rule:\n", |
1078 | chan->center_freq); | |
e702d3cf | 1079 | |
b0dfd2ea | 1080 | REG_DBG_PRINT("%d KHz - %d KHz @ %s), (%s mBi, %d mBm)\n", |
1a919318 | 1081 | freq_range->start_freq_khz, freq_range->end_freq_khz, |
b0dfd2ea | 1082 | bw, max_antenna_gain, |
e702d3cf LR |
1083 | power_rule->max_eirp); |
1084 | } | |
1085 | #else | |
b0dfd2ea JD |
1086 | static void chan_reg_rule_print_dbg(const struct ieee80211_regdomain *regd, |
1087 | struct ieee80211_channel *chan, | |
e702d3cf LR |
1088 | const struct ieee80211_reg_rule *reg_rule) |
1089 | { | |
1090 | return; | |
1091 | } | |
926a0a09 LR |
1092 | #endif |
1093 | ||
e33e2241 JB |
1094 | /* |
1095 | * Note that right now we assume the desired channel bandwidth | |
1096 | * is always 20 MHz for each individual channel (HT40 uses 20 MHz | |
1097 | * per channel, the primary and the extension channel). | |
038659e7 | 1098 | */ |
7ca43d03 LR |
1099 | static void handle_channel(struct wiphy *wiphy, |
1100 | enum nl80211_reg_initiator initiator, | |
fdc9d7b2 | 1101 | struct ieee80211_channel *chan) |
b2e1b302 | 1102 | { |
038659e7 | 1103 | u32 flags, bw_flags = 0; |
b2e1b302 LR |
1104 | const struct ieee80211_reg_rule *reg_rule = NULL; |
1105 | const struct ieee80211_power_rule *power_rule = NULL; | |
038659e7 | 1106 | const struct ieee80211_freq_range *freq_range = NULL; |
fe33eb39 | 1107 | struct wiphy *request_wiphy = NULL; |
c492db37 | 1108 | struct regulatory_request *lr = get_last_request(); |
97524820 JD |
1109 | const struct ieee80211_regdomain *regd; |
1110 | u32 max_bandwidth_khz; | |
a92a3ce7 | 1111 | |
c492db37 | 1112 | request_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx); |
a92a3ce7 LR |
1113 | |
1114 | flags = chan->orig_flags; | |
b2e1b302 | 1115 | |
361c9c8b JB |
1116 | reg_rule = freq_reg_info(wiphy, MHZ_TO_KHZ(chan->center_freq)); |
1117 | if (IS_ERR(reg_rule)) { | |
ca4ffe8f LR |
1118 | /* |
1119 | * We will disable all channels that do not match our | |
25985edc | 1120 | * received regulatory rule unless the hint is coming |
ca4ffe8f LR |
1121 | * from a Country IE and the Country IE had no information |
1122 | * about a band. The IEEE 802.11 spec allows for an AP | |
1123 | * to send only a subset of the regulatory rules allowed, | |
1124 | * so an AP in the US that only supports 2.4 GHz may only send | |
1125 | * a country IE with information for the 2.4 GHz band | |
1126 | * while 5 GHz is still supported. | |
1127 | */ | |
1128 | if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE && | |
361c9c8b | 1129 | PTR_ERR(reg_rule) == -ERANGE) |
ca4ffe8f LR |
1130 | return; |
1131 | ||
cc493e4f LR |
1132 | if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER && |
1133 | request_wiphy && request_wiphy == wiphy && | |
a2f73b6c | 1134 | request_wiphy->regulatory_flags & REGULATORY_STRICT_REG) { |
cc493e4f LR |
1135 | REG_DBG_PRINT("Disabling freq %d MHz for good\n", |
1136 | chan->center_freq); | |
1137 | chan->orig_flags |= IEEE80211_CHAN_DISABLED; | |
1138 | chan->flags = chan->orig_flags; | |
1139 | } else { | |
1140 | REG_DBG_PRINT("Disabling freq %d MHz\n", | |
1141 | chan->center_freq); | |
1142 | chan->flags |= IEEE80211_CHAN_DISABLED; | |
1143 | } | |
8318d78a | 1144 | return; |
ca4ffe8f | 1145 | } |
8318d78a | 1146 | |
b0dfd2ea JD |
1147 | regd = reg_get_regdomain(wiphy); |
1148 | chan_reg_rule_print_dbg(regd, chan, reg_rule); | |
e702d3cf | 1149 | |
b2e1b302 | 1150 | power_rule = ®_rule->power_rule; |
038659e7 LR |
1151 | freq_range = ®_rule->freq_range; |
1152 | ||
97524820 JD |
1153 | max_bandwidth_khz = freq_range->max_bandwidth_khz; |
1154 | /* Check if auto calculation requested */ | |
b0dfd2ea | 1155 | if (reg_rule->flags & NL80211_RRF_AUTO_BW) |
97524820 | 1156 | max_bandwidth_khz = reg_get_max_bandwidth(regd, reg_rule); |
97524820 JD |
1157 | |
1158 | if (max_bandwidth_khz < MHZ_TO_KHZ(40)) | |
e33e2241 | 1159 | bw_flags = IEEE80211_CHAN_NO_HT40; |
97524820 | 1160 | if (max_bandwidth_khz < MHZ_TO_KHZ(80)) |
c7a6ee27 | 1161 | bw_flags |= IEEE80211_CHAN_NO_80MHZ; |
97524820 | 1162 | if (max_bandwidth_khz < MHZ_TO_KHZ(160)) |
c7a6ee27 | 1163 | bw_flags |= IEEE80211_CHAN_NO_160MHZ; |
b2e1b302 | 1164 | |
c492db37 | 1165 | if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER && |
806a9e39 | 1166 | request_wiphy && request_wiphy == wiphy && |
a2f73b6c | 1167 | request_wiphy->regulatory_flags & REGULATORY_STRICT_REG) { |
fb1fc7ad | 1168 | /* |
25985edc | 1169 | * This guarantees the driver's requested regulatory domain |
f976376d | 1170 | * will always be used as a base for further regulatory |
fb1fc7ad LR |
1171 | * settings |
1172 | */ | |
f976376d | 1173 | chan->flags = chan->orig_flags = |
038659e7 | 1174 | map_regdom_flags(reg_rule->flags) | bw_flags; |
f976376d LR |
1175 | chan->max_antenna_gain = chan->orig_mag = |
1176 | (int) MBI_TO_DBI(power_rule->max_antenna_gain); | |
279f0f55 | 1177 | chan->max_reg_power = chan->max_power = chan->orig_mpwr = |
f976376d | 1178 | (int) MBM_TO_DBM(power_rule->max_eirp); |
4f267c11 JD |
1179 | |
1180 | if (chan->flags & IEEE80211_CHAN_RADAR) { | |
1181 | chan->dfs_cac_ms = IEEE80211_DFS_MIN_CAC_TIME_MS; | |
1182 | if (reg_rule->dfs_cac_ms) | |
1183 | chan->dfs_cac_ms = reg_rule->dfs_cac_ms; | |
1184 | } | |
1185 | ||
f976376d LR |
1186 | return; |
1187 | } | |
1188 | ||
04f39047 SW |
1189 | chan->dfs_state = NL80211_DFS_USABLE; |
1190 | chan->dfs_state_entered = jiffies; | |
1191 | ||
aa3d7eef | 1192 | chan->beacon_found = false; |
038659e7 | 1193 | chan->flags = flags | bw_flags | map_regdom_flags(reg_rule->flags); |
1a919318 JB |
1194 | chan->max_antenna_gain = |
1195 | min_t(int, chan->orig_mag, | |
1196 | MBI_TO_DBI(power_rule->max_antenna_gain)); | |
eccc068e | 1197 | chan->max_reg_power = (int) MBM_TO_DBM(power_rule->max_eirp); |
089027e5 JD |
1198 | |
1199 | if (chan->flags & IEEE80211_CHAN_RADAR) { | |
1200 | if (reg_rule->dfs_cac_ms) | |
1201 | chan->dfs_cac_ms = reg_rule->dfs_cac_ms; | |
1202 | else | |
1203 | chan->dfs_cac_ms = IEEE80211_DFS_MIN_CAC_TIME_MS; | |
1204 | } | |
1205 | ||
5e31fc08 SG |
1206 | if (chan->orig_mpwr) { |
1207 | /* | |
a09a85a0 LR |
1208 | * Devices that use REGULATORY_COUNTRY_IE_FOLLOW_POWER |
1209 | * will always follow the passed country IE power settings. | |
5e31fc08 SG |
1210 | */ |
1211 | if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE && | |
a09a85a0 | 1212 | wiphy->regulatory_flags & REGULATORY_COUNTRY_IE_FOLLOW_POWER) |
5e31fc08 SG |
1213 | chan->max_power = chan->max_reg_power; |
1214 | else | |
1215 | chan->max_power = min(chan->orig_mpwr, | |
1216 | chan->max_reg_power); | |
1217 | } else | |
1218 | chan->max_power = chan->max_reg_power; | |
8318d78a JB |
1219 | } |
1220 | ||
7ca43d03 | 1221 | static void handle_band(struct wiphy *wiphy, |
fdc9d7b2 JB |
1222 | enum nl80211_reg_initiator initiator, |
1223 | struct ieee80211_supported_band *sband) | |
8318d78a | 1224 | { |
a92a3ce7 | 1225 | unsigned int i; |
a92a3ce7 | 1226 | |
fdc9d7b2 JB |
1227 | if (!sband) |
1228 | return; | |
8318d78a JB |
1229 | |
1230 | for (i = 0; i < sband->n_channels; i++) | |
fdc9d7b2 | 1231 | handle_channel(wiphy, initiator, &sband->channels[i]); |
8318d78a JB |
1232 | } |
1233 | ||
57b5ce07 LR |
1234 | static bool reg_request_cell_base(struct regulatory_request *request) |
1235 | { | |
1236 | if (request->initiator != NL80211_REGDOM_SET_BY_USER) | |
1237 | return false; | |
1a919318 | 1238 | return request->user_reg_hint_type == NL80211_USER_REG_HINT_CELL_BASE; |
57b5ce07 LR |
1239 | } |
1240 | ||
52616f2b IP |
1241 | static bool reg_request_indoor(struct regulatory_request *request) |
1242 | { | |
1243 | if (request->initiator != NL80211_REGDOM_SET_BY_USER) | |
1244 | return false; | |
1245 | return request->user_reg_hint_type == NL80211_USER_REG_HINT_INDOOR; | |
1246 | } | |
1247 | ||
57b5ce07 LR |
1248 | bool reg_last_request_cell_base(void) |
1249 | { | |
38fd2143 | 1250 | return reg_request_cell_base(get_last_request()); |
57b5ce07 LR |
1251 | } |
1252 | ||
94fc661f | 1253 | #ifdef CONFIG_CFG80211_REG_CELLULAR_HINTS |
57b5ce07 | 1254 | /* Core specific check */ |
2f92212b JB |
1255 | static enum reg_request_treatment |
1256 | reg_ignore_cell_hint(struct regulatory_request *pending_request) | |
57b5ce07 | 1257 | { |
c492db37 JB |
1258 | struct regulatory_request *lr = get_last_request(); |
1259 | ||
57b5ce07 | 1260 | if (!reg_num_devs_support_basehint) |
2f92212b | 1261 | return REG_REQ_IGNORE; |
57b5ce07 | 1262 | |
c492db37 | 1263 | if (reg_request_cell_base(lr) && |
1a919318 | 1264 | !regdom_changes(pending_request->alpha2)) |
2f92212b | 1265 | return REG_REQ_ALREADY_SET; |
1a919318 | 1266 | |
2f92212b | 1267 | return REG_REQ_OK; |
57b5ce07 LR |
1268 | } |
1269 | ||
1270 | /* Device specific check */ | |
1271 | static bool reg_dev_ignore_cell_hint(struct wiphy *wiphy) | |
1272 | { | |
1a919318 | 1273 | return !(wiphy->features & NL80211_FEATURE_CELL_BASE_REG_HINTS); |
57b5ce07 LR |
1274 | } |
1275 | #else | |
1276 | static int reg_ignore_cell_hint(struct regulatory_request *pending_request) | |
1277 | { | |
2f92212b | 1278 | return REG_REQ_IGNORE; |
57b5ce07 | 1279 | } |
1a919318 JB |
1280 | |
1281 | static bool reg_dev_ignore_cell_hint(struct wiphy *wiphy) | |
57b5ce07 LR |
1282 | { |
1283 | return true; | |
1284 | } | |
1285 | #endif | |
1286 | ||
fa1fb9cb LR |
1287 | static bool wiphy_strict_alpha2_regd(struct wiphy *wiphy) |
1288 | { | |
a2f73b6c LR |
1289 | if (wiphy->regulatory_flags & REGULATORY_STRICT_REG && |
1290 | !(wiphy->regulatory_flags & REGULATORY_CUSTOM_REG)) | |
fa1fb9cb LR |
1291 | return true; |
1292 | return false; | |
1293 | } | |
57b5ce07 | 1294 | |
7db90f4a LR |
1295 | static bool ignore_reg_update(struct wiphy *wiphy, |
1296 | enum nl80211_reg_initiator initiator) | |
14b9815a | 1297 | { |
c492db37 JB |
1298 | struct regulatory_request *lr = get_last_request(); |
1299 | ||
1300 | if (!lr) { | |
034c6d6e LR |
1301 | REG_DBG_PRINT("Ignoring regulatory request set by %s " |
1302 | "since last_request is not set\n", | |
926a0a09 | 1303 | reg_initiator_name(initiator)); |
14b9815a | 1304 | return true; |
926a0a09 LR |
1305 | } |
1306 | ||
7db90f4a | 1307 | if (initiator == NL80211_REGDOM_SET_BY_CORE && |
a2f73b6c | 1308 | wiphy->regulatory_flags & REGULATORY_CUSTOM_REG) { |
034c6d6e LR |
1309 | REG_DBG_PRINT("Ignoring regulatory request set by %s " |
1310 | "since the driver uses its own custom " | |
1311 | "regulatory domain\n", | |
926a0a09 | 1312 | reg_initiator_name(initiator)); |
14b9815a | 1313 | return true; |
926a0a09 LR |
1314 | } |
1315 | ||
fb1fc7ad LR |
1316 | /* |
1317 | * wiphy->regd will be set once the device has its own | |
1318 | * desired regulatory domain set | |
1319 | */ | |
fa1fb9cb | 1320 | if (wiphy_strict_alpha2_regd(wiphy) && !wiphy->regd && |
749b527b | 1321 | initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && |
c492db37 | 1322 | !is_world_regdom(lr->alpha2)) { |
034c6d6e LR |
1323 | REG_DBG_PRINT("Ignoring regulatory request set by %s " |
1324 | "since the driver requires its own regulatory " | |
1325 | "domain to be set first\n", | |
926a0a09 | 1326 | reg_initiator_name(initiator)); |
14b9815a | 1327 | return true; |
926a0a09 LR |
1328 | } |
1329 | ||
c492db37 | 1330 | if (reg_request_cell_base(lr)) |
57b5ce07 LR |
1331 | return reg_dev_ignore_cell_hint(wiphy); |
1332 | ||
14b9815a LR |
1333 | return false; |
1334 | } | |
1335 | ||
3195e489 LR |
1336 | static bool reg_is_world_roaming(struct wiphy *wiphy) |
1337 | { | |
1338 | const struct ieee80211_regdomain *cr = get_cfg80211_regdom(); | |
1339 | const struct ieee80211_regdomain *wr = get_wiphy_regdom(wiphy); | |
1340 | struct regulatory_request *lr = get_last_request(); | |
1341 | ||
1342 | if (is_world_regdom(cr->alpha2) || (wr && is_world_regdom(wr->alpha2))) | |
1343 | return true; | |
1344 | ||
1345 | if (lr && lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && | |
a2f73b6c | 1346 | wiphy->regulatory_flags & REGULATORY_CUSTOM_REG) |
3195e489 LR |
1347 | return true; |
1348 | ||
1349 | return false; | |
1350 | } | |
1351 | ||
1a919318 | 1352 | static void handle_reg_beacon(struct wiphy *wiphy, unsigned int chan_idx, |
e38f8a7a LR |
1353 | struct reg_beacon *reg_beacon) |
1354 | { | |
e38f8a7a LR |
1355 | struct ieee80211_supported_band *sband; |
1356 | struct ieee80211_channel *chan; | |
6bad8766 LR |
1357 | bool channel_changed = false; |
1358 | struct ieee80211_channel chan_before; | |
e38f8a7a | 1359 | |
e38f8a7a LR |
1360 | sband = wiphy->bands[reg_beacon->chan.band]; |
1361 | chan = &sband->channels[chan_idx]; | |
1362 | ||
1363 | if (likely(chan->center_freq != reg_beacon->chan.center_freq)) | |
1364 | return; | |
1365 | ||
6bad8766 LR |
1366 | if (chan->beacon_found) |
1367 | return; | |
1368 | ||
1369 | chan->beacon_found = true; | |
1370 | ||
0f500a5f LR |
1371 | if (!reg_is_world_roaming(wiphy)) |
1372 | return; | |
1373 | ||
a2f73b6c | 1374 | if (wiphy->regulatory_flags & REGULATORY_DISABLE_BEACON_HINTS) |
37184244 LR |
1375 | return; |
1376 | ||
6bad8766 LR |
1377 | chan_before.center_freq = chan->center_freq; |
1378 | chan_before.flags = chan->flags; | |
1379 | ||
8fe02e16 LR |
1380 | if (chan->flags & IEEE80211_CHAN_NO_IR) { |
1381 | chan->flags &= ~IEEE80211_CHAN_NO_IR; | |
6bad8766 | 1382 | channel_changed = true; |
e38f8a7a LR |
1383 | } |
1384 | ||
6bad8766 LR |
1385 | if (channel_changed) |
1386 | nl80211_send_beacon_hint_event(wiphy, &chan_before, chan); | |
e38f8a7a LR |
1387 | } |
1388 | ||
1389 | /* | |
1390 | * Called when a scan on a wiphy finds a beacon on | |
1391 | * new channel | |
1392 | */ | |
1393 | static void wiphy_update_new_beacon(struct wiphy *wiphy, | |
1394 | struct reg_beacon *reg_beacon) | |
1395 | { | |
1396 | unsigned int i; | |
1397 | struct ieee80211_supported_band *sband; | |
1398 | ||
e38f8a7a LR |
1399 | if (!wiphy->bands[reg_beacon->chan.band]) |
1400 | return; | |
1401 | ||
1402 | sband = wiphy->bands[reg_beacon->chan.band]; | |
1403 | ||
1404 | for (i = 0; i < sband->n_channels; i++) | |
1405 | handle_reg_beacon(wiphy, i, reg_beacon); | |
1406 | } | |
1407 | ||
1408 | /* | |
1409 | * Called upon reg changes or a new wiphy is added | |
1410 | */ | |
1411 | static void wiphy_update_beacon_reg(struct wiphy *wiphy) | |
1412 | { | |
1413 | unsigned int i; | |
1414 | struct ieee80211_supported_band *sband; | |
1415 | struct reg_beacon *reg_beacon; | |
1416 | ||
e38f8a7a LR |
1417 | list_for_each_entry(reg_beacon, ®_beacon_list, list) { |
1418 | if (!wiphy->bands[reg_beacon->chan.band]) | |
1419 | continue; | |
1420 | sband = wiphy->bands[reg_beacon->chan.band]; | |
1421 | for (i = 0; i < sband->n_channels; i++) | |
1422 | handle_reg_beacon(wiphy, i, reg_beacon); | |
1423 | } | |
1424 | } | |
1425 | ||
e38f8a7a LR |
1426 | /* Reap the advantages of previously found beacons */ |
1427 | static void reg_process_beacons(struct wiphy *wiphy) | |
1428 | { | |
b1ed8ddd LR |
1429 | /* |
1430 | * Means we are just firing up cfg80211, so no beacons would | |
1431 | * have been processed yet. | |
1432 | */ | |
1433 | if (!last_request) | |
1434 | return; | |
e38f8a7a LR |
1435 | wiphy_update_beacon_reg(wiphy); |
1436 | } | |
1437 | ||
1a919318 | 1438 | static bool is_ht40_allowed(struct ieee80211_channel *chan) |
038659e7 LR |
1439 | { |
1440 | if (!chan) | |
1a919318 | 1441 | return false; |
038659e7 | 1442 | if (chan->flags & IEEE80211_CHAN_DISABLED) |
1a919318 | 1443 | return false; |
038659e7 | 1444 | /* This would happen when regulatory rules disallow HT40 completely */ |
55b183ad FF |
1445 | if ((chan->flags & IEEE80211_CHAN_NO_HT40) == IEEE80211_CHAN_NO_HT40) |
1446 | return false; | |
1447 | return true; | |
038659e7 LR |
1448 | } |
1449 | ||
1450 | static void reg_process_ht_flags_channel(struct wiphy *wiphy, | |
fdc9d7b2 | 1451 | struct ieee80211_channel *channel) |
038659e7 | 1452 | { |
fdc9d7b2 | 1453 | struct ieee80211_supported_band *sband = wiphy->bands[channel->band]; |
038659e7 LR |
1454 | struct ieee80211_channel *channel_before = NULL, *channel_after = NULL; |
1455 | unsigned int i; | |
1456 | ||
1a919318 | 1457 | if (!is_ht40_allowed(channel)) { |
038659e7 LR |
1458 | channel->flags |= IEEE80211_CHAN_NO_HT40; |
1459 | return; | |
1460 | } | |
1461 | ||
1462 | /* | |
1463 | * We need to ensure the extension channels exist to | |
1464 | * be able to use HT40- or HT40+, this finds them (or not) | |
1465 | */ | |
1466 | for (i = 0; i < sband->n_channels; i++) { | |
1467 | struct ieee80211_channel *c = &sband->channels[i]; | |
1a919318 | 1468 | |
038659e7 LR |
1469 | if (c->center_freq == (channel->center_freq - 20)) |
1470 | channel_before = c; | |
1471 | if (c->center_freq == (channel->center_freq + 20)) | |
1472 | channel_after = c; | |
1473 | } | |
1474 | ||
1475 | /* | |
1476 | * Please note that this assumes target bandwidth is 20 MHz, | |
1477 | * if that ever changes we also need to change the below logic | |
1478 | * to include that as well. | |
1479 | */ | |
1a919318 | 1480 | if (!is_ht40_allowed(channel_before)) |
689da1b3 | 1481 | channel->flags |= IEEE80211_CHAN_NO_HT40MINUS; |
038659e7 | 1482 | else |
689da1b3 | 1483 | channel->flags &= ~IEEE80211_CHAN_NO_HT40MINUS; |
038659e7 | 1484 | |
1a919318 | 1485 | if (!is_ht40_allowed(channel_after)) |
689da1b3 | 1486 | channel->flags |= IEEE80211_CHAN_NO_HT40PLUS; |
038659e7 | 1487 | else |
689da1b3 | 1488 | channel->flags &= ~IEEE80211_CHAN_NO_HT40PLUS; |
038659e7 LR |
1489 | } |
1490 | ||
1491 | static void reg_process_ht_flags_band(struct wiphy *wiphy, | |
fdc9d7b2 | 1492 | struct ieee80211_supported_band *sband) |
038659e7 LR |
1493 | { |
1494 | unsigned int i; | |
038659e7 | 1495 | |
fdc9d7b2 JB |
1496 | if (!sband) |
1497 | return; | |
038659e7 LR |
1498 | |
1499 | for (i = 0; i < sband->n_channels; i++) | |
fdc9d7b2 | 1500 | reg_process_ht_flags_channel(wiphy, &sband->channels[i]); |
038659e7 LR |
1501 | } |
1502 | ||
1503 | static void reg_process_ht_flags(struct wiphy *wiphy) | |
1504 | { | |
1505 | enum ieee80211_band band; | |
1506 | ||
1507 | if (!wiphy) | |
1508 | return; | |
1509 | ||
fdc9d7b2 JB |
1510 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) |
1511 | reg_process_ht_flags_band(wiphy, wiphy->bands[band]); | |
038659e7 LR |
1512 | } |
1513 | ||
0e3802db LR |
1514 | static void reg_call_notifier(struct wiphy *wiphy, |
1515 | struct regulatory_request *request) | |
1516 | { | |
1517 | if (wiphy->reg_notifier) | |
1518 | wiphy->reg_notifier(wiphy, request); | |
1519 | } | |
1520 | ||
eac03e38 SN |
1521 | static void wiphy_update_regulatory(struct wiphy *wiphy, |
1522 | enum nl80211_reg_initiator initiator) | |
b2e1b302 LR |
1523 | { |
1524 | enum ieee80211_band band; | |
c492db37 | 1525 | struct regulatory_request *lr = get_last_request(); |
eac03e38 | 1526 | |
0e3802db LR |
1527 | if (ignore_reg_update(wiphy, initiator)) { |
1528 | /* | |
1529 | * Regulatory updates set by CORE are ignored for custom | |
1530 | * regulatory cards. Let us notify the changes to the driver, | |
1531 | * as some drivers used this to restore its orig_* reg domain. | |
1532 | */ | |
1533 | if (initiator == NL80211_REGDOM_SET_BY_CORE && | |
a2f73b6c | 1534 | wiphy->regulatory_flags & REGULATORY_CUSTOM_REG) |
0e3802db | 1535 | reg_call_notifier(wiphy, lr); |
a203c2aa | 1536 | return; |
0e3802db | 1537 | } |
a203c2aa | 1538 | |
c492db37 | 1539 | lr->dfs_region = get_cfg80211_regdom()->dfs_region; |
b68e6b3b | 1540 | |
fdc9d7b2 JB |
1541 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) |
1542 | handle_band(wiphy, initiator, wiphy->bands[band]); | |
a203c2aa | 1543 | |
e38f8a7a | 1544 | reg_process_beacons(wiphy); |
038659e7 | 1545 | reg_process_ht_flags(wiphy); |
0e3802db | 1546 | reg_call_notifier(wiphy, lr); |
b2e1b302 LR |
1547 | } |
1548 | ||
d7549cbb SN |
1549 | static void update_all_wiphy_regulatory(enum nl80211_reg_initiator initiator) |
1550 | { | |
1551 | struct cfg80211_registered_device *rdev; | |
4a38994f | 1552 | struct wiphy *wiphy; |
d7549cbb | 1553 | |
5fe231e8 | 1554 | ASSERT_RTNL(); |
458f4f9e | 1555 | |
4a38994f RM |
1556 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) { |
1557 | wiphy = &rdev->wiphy; | |
1558 | wiphy_update_regulatory(wiphy, initiator); | |
4a38994f | 1559 | } |
d7549cbb SN |
1560 | } |
1561 | ||
1fa25e41 | 1562 | static void handle_channel_custom(struct wiphy *wiphy, |
fdc9d7b2 | 1563 | struct ieee80211_channel *chan, |
1fa25e41 LR |
1564 | const struct ieee80211_regdomain *regd) |
1565 | { | |
038659e7 | 1566 | u32 bw_flags = 0; |
1fa25e41 LR |
1567 | const struct ieee80211_reg_rule *reg_rule = NULL; |
1568 | const struct ieee80211_power_rule *power_rule = NULL; | |
038659e7 | 1569 | const struct ieee80211_freq_range *freq_range = NULL; |
97524820 | 1570 | u32 max_bandwidth_khz; |
ac46d48e | 1571 | |
361c9c8b JB |
1572 | reg_rule = freq_reg_info_regd(wiphy, MHZ_TO_KHZ(chan->center_freq), |
1573 | regd); | |
1fa25e41 | 1574 | |
361c9c8b | 1575 | if (IS_ERR(reg_rule)) { |
fe7ef5e9 JB |
1576 | REG_DBG_PRINT("Disabling freq %d MHz as custom regd has no rule that fits it\n", |
1577 | chan->center_freq); | |
cc493e4f LR |
1578 | chan->orig_flags |= IEEE80211_CHAN_DISABLED; |
1579 | chan->flags = chan->orig_flags; | |
1fa25e41 LR |
1580 | return; |
1581 | } | |
1582 | ||
b0dfd2ea | 1583 | chan_reg_rule_print_dbg(regd, chan, reg_rule); |
e702d3cf | 1584 | |
1fa25e41 | 1585 | power_rule = ®_rule->power_rule; |
038659e7 LR |
1586 | freq_range = ®_rule->freq_range; |
1587 | ||
97524820 JD |
1588 | max_bandwidth_khz = freq_range->max_bandwidth_khz; |
1589 | /* Check if auto calculation requested */ | |
b0dfd2ea | 1590 | if (reg_rule->flags & NL80211_RRF_AUTO_BW) |
97524820 JD |
1591 | max_bandwidth_khz = reg_get_max_bandwidth(regd, reg_rule); |
1592 | ||
1593 | if (max_bandwidth_khz < MHZ_TO_KHZ(40)) | |
e33e2241 | 1594 | bw_flags = IEEE80211_CHAN_NO_HT40; |
97524820 | 1595 | if (max_bandwidth_khz < MHZ_TO_KHZ(80)) |
c7a6ee27 | 1596 | bw_flags |= IEEE80211_CHAN_NO_80MHZ; |
97524820 | 1597 | if (max_bandwidth_khz < MHZ_TO_KHZ(160)) |
c7a6ee27 | 1598 | bw_flags |= IEEE80211_CHAN_NO_160MHZ; |
1fa25e41 | 1599 | |
038659e7 | 1600 | chan->flags |= map_regdom_flags(reg_rule->flags) | bw_flags; |
1fa25e41 | 1601 | chan->max_antenna_gain = (int) MBI_TO_DBI(power_rule->max_antenna_gain); |
279f0f55 FF |
1602 | chan->max_reg_power = chan->max_power = |
1603 | (int) MBM_TO_DBM(power_rule->max_eirp); | |
1fa25e41 LR |
1604 | } |
1605 | ||
fdc9d7b2 JB |
1606 | static void handle_band_custom(struct wiphy *wiphy, |
1607 | struct ieee80211_supported_band *sband, | |
1fa25e41 LR |
1608 | const struct ieee80211_regdomain *regd) |
1609 | { | |
1610 | unsigned int i; | |
1fa25e41 | 1611 | |
fdc9d7b2 JB |
1612 | if (!sband) |
1613 | return; | |
1fa25e41 LR |
1614 | |
1615 | for (i = 0; i < sband->n_channels; i++) | |
fdc9d7b2 | 1616 | handle_channel_custom(wiphy, &sband->channels[i], regd); |
1fa25e41 LR |
1617 | } |
1618 | ||
1619 | /* Used by drivers prior to wiphy registration */ | |
1620 | void wiphy_apply_custom_regulatory(struct wiphy *wiphy, | |
1621 | const struct ieee80211_regdomain *regd) | |
1622 | { | |
1623 | enum ieee80211_band band; | |
bbcf3f02 | 1624 | unsigned int bands_set = 0; |
ac46d48e | 1625 | |
a2f73b6c LR |
1626 | WARN(!(wiphy->regulatory_flags & REGULATORY_CUSTOM_REG), |
1627 | "wiphy should have REGULATORY_CUSTOM_REG\n"); | |
1628 | wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG; | |
222ea581 | 1629 | |
1fa25e41 | 1630 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) { |
bbcf3f02 LR |
1631 | if (!wiphy->bands[band]) |
1632 | continue; | |
fdc9d7b2 | 1633 | handle_band_custom(wiphy, wiphy->bands[band], regd); |
bbcf3f02 | 1634 | bands_set++; |
b2e1b302 | 1635 | } |
bbcf3f02 LR |
1636 | |
1637 | /* | |
1638 | * no point in calling this if it won't have any effect | |
1a919318 | 1639 | * on your device's supported bands. |
bbcf3f02 LR |
1640 | */ |
1641 | WARN_ON(!bands_set); | |
b2e1b302 | 1642 | } |
1fa25e41 LR |
1643 | EXPORT_SYMBOL(wiphy_apply_custom_regulatory); |
1644 | ||
b2e253cf LR |
1645 | static void reg_set_request_processed(void) |
1646 | { | |
1647 | bool need_more_processing = false; | |
c492db37 | 1648 | struct regulatory_request *lr = get_last_request(); |
b2e253cf | 1649 | |
c492db37 | 1650 | lr->processed = true; |
b2e253cf LR |
1651 | |
1652 | spin_lock(®_requests_lock); | |
1653 | if (!list_empty(®_requests_list)) | |
1654 | need_more_processing = true; | |
1655 | spin_unlock(®_requests_lock); | |
1656 | ||
c492db37 | 1657 | if (lr->initiator == NL80211_REGDOM_SET_BY_USER) |
fe20b39e | 1658 | cancel_delayed_work(®_timeout); |
a90c7a31 | 1659 | |
b2e253cf LR |
1660 | if (need_more_processing) |
1661 | schedule_work(®_work); | |
1662 | } | |
1663 | ||
b3eb7f3f LR |
1664 | /** |
1665 | * reg_process_hint_core - process core regulatory requests | |
1666 | * @pending_request: a pending core regulatory request | |
1667 | * | |
1668 | * The wireless subsystem can use this function to process | |
1669 | * a regulatory request issued by the regulatory core. | |
1670 | * | |
1671 | * Returns one of the different reg request treatment values. | |
1672 | */ | |
1673 | static enum reg_request_treatment | |
1674 | reg_process_hint_core(struct regulatory_request *core_request) | |
1675 | { | |
b3eb7f3f LR |
1676 | |
1677 | core_request->intersect = false; | |
1678 | core_request->processed = false; | |
5ad6ef5e | 1679 | |
05f1a3ea | 1680 | reg_update_last_request(core_request); |
b3eb7f3f | 1681 | |
fe6631ff | 1682 | return reg_call_crda(core_request); |
b3eb7f3f LR |
1683 | } |
1684 | ||
0d97a619 LR |
1685 | static enum reg_request_treatment |
1686 | __reg_process_hint_user(struct regulatory_request *user_request) | |
1687 | { | |
1688 | struct regulatory_request *lr = get_last_request(); | |
1689 | ||
52616f2b IP |
1690 | if (reg_request_indoor(user_request)) { |
1691 | reg_is_indoor = true; | |
1692 | return REG_REQ_USER_HINT_HANDLED; | |
1693 | } | |
1694 | ||
0d97a619 LR |
1695 | if (reg_request_cell_base(user_request)) |
1696 | return reg_ignore_cell_hint(user_request); | |
1697 | ||
1698 | if (reg_request_cell_base(lr)) | |
1699 | return REG_REQ_IGNORE; | |
1700 | ||
1701 | if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) | |
1702 | return REG_REQ_INTERSECT; | |
1703 | /* | |
1704 | * If the user knows better the user should set the regdom | |
1705 | * to their country before the IE is picked up | |
1706 | */ | |
1707 | if (lr->initiator == NL80211_REGDOM_SET_BY_USER && | |
1708 | lr->intersect) | |
1709 | return REG_REQ_IGNORE; | |
1710 | /* | |
1711 | * Process user requests only after previous user/driver/core | |
1712 | * requests have been processed | |
1713 | */ | |
1714 | if ((lr->initiator == NL80211_REGDOM_SET_BY_CORE || | |
1715 | lr->initiator == NL80211_REGDOM_SET_BY_DRIVER || | |
1716 | lr->initiator == NL80211_REGDOM_SET_BY_USER) && | |
1717 | regdom_changes(lr->alpha2)) | |
1718 | return REG_REQ_IGNORE; | |
1719 | ||
1720 | if (!regdom_changes(user_request->alpha2)) | |
1721 | return REG_REQ_ALREADY_SET; | |
1722 | ||
1723 | return REG_REQ_OK; | |
1724 | } | |
1725 | ||
1726 | /** | |
1727 | * reg_process_hint_user - process user regulatory requests | |
1728 | * @user_request: a pending user regulatory request | |
1729 | * | |
1730 | * The wireless subsystem can use this function to process | |
1731 | * a regulatory request initiated by userspace. | |
1732 | * | |
1733 | * Returns one of the different reg request treatment values. | |
1734 | */ | |
1735 | static enum reg_request_treatment | |
1736 | reg_process_hint_user(struct regulatory_request *user_request) | |
1737 | { | |
1738 | enum reg_request_treatment treatment; | |
0d97a619 LR |
1739 | |
1740 | treatment = __reg_process_hint_user(user_request); | |
1741 | if (treatment == REG_REQ_IGNORE || | |
52616f2b IP |
1742 | treatment == REG_REQ_ALREADY_SET || |
1743 | treatment == REG_REQ_USER_HINT_HANDLED) { | |
c888393b | 1744 | reg_free_request(user_request); |
0d97a619 LR |
1745 | return treatment; |
1746 | } | |
1747 | ||
0d97a619 LR |
1748 | user_request->intersect = treatment == REG_REQ_INTERSECT; |
1749 | user_request->processed = false; | |
5ad6ef5e | 1750 | |
05f1a3ea | 1751 | reg_update_last_request(user_request); |
0d97a619 LR |
1752 | |
1753 | user_alpha2[0] = user_request->alpha2[0]; | |
1754 | user_alpha2[1] = user_request->alpha2[1]; | |
1755 | ||
fe6631ff | 1756 | return reg_call_crda(user_request); |
0d97a619 LR |
1757 | } |
1758 | ||
21636c7f LR |
1759 | static enum reg_request_treatment |
1760 | __reg_process_hint_driver(struct regulatory_request *driver_request) | |
1761 | { | |
1762 | struct regulatory_request *lr = get_last_request(); | |
1763 | ||
1764 | if (lr->initiator == NL80211_REGDOM_SET_BY_CORE) { | |
1765 | if (regdom_changes(driver_request->alpha2)) | |
1766 | return REG_REQ_OK; | |
1767 | return REG_REQ_ALREADY_SET; | |
1768 | } | |
1769 | ||
1770 | /* | |
1771 | * This would happen if you unplug and plug your card | |
1772 | * back in or if you add a new device for which the previously | |
1773 | * loaded card also agrees on the regulatory domain. | |
1774 | */ | |
1775 | if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER && | |
1776 | !regdom_changes(driver_request->alpha2)) | |
1777 | return REG_REQ_ALREADY_SET; | |
1778 | ||
1779 | return REG_REQ_INTERSECT; | |
1780 | } | |
1781 | ||
1782 | /** | |
1783 | * reg_process_hint_driver - process driver regulatory requests | |
1784 | * @driver_request: a pending driver regulatory request | |
1785 | * | |
1786 | * The wireless subsystem can use this function to process | |
1787 | * a regulatory request issued by an 802.11 driver. | |
1788 | * | |
1789 | * Returns one of the different reg request treatment values. | |
1790 | */ | |
1791 | static enum reg_request_treatment | |
1792 | reg_process_hint_driver(struct wiphy *wiphy, | |
1793 | struct regulatory_request *driver_request) | |
1794 | { | |
1795 | const struct ieee80211_regdomain *regd; | |
1796 | enum reg_request_treatment treatment; | |
21636c7f LR |
1797 | |
1798 | treatment = __reg_process_hint_driver(driver_request); | |
1799 | ||
1800 | switch (treatment) { | |
1801 | case REG_REQ_OK: | |
1802 | break; | |
1803 | case REG_REQ_IGNORE: | |
52616f2b | 1804 | case REG_REQ_USER_HINT_HANDLED: |
c888393b | 1805 | reg_free_request(driver_request); |
21636c7f LR |
1806 | return treatment; |
1807 | case REG_REQ_INTERSECT: | |
1808 | /* fall through */ | |
1809 | case REG_REQ_ALREADY_SET: | |
1810 | regd = reg_copy_regd(get_cfg80211_regdom()); | |
1811 | if (IS_ERR(regd)) { | |
c888393b | 1812 | reg_free_request(driver_request); |
21636c7f LR |
1813 | return REG_REQ_IGNORE; |
1814 | } | |
1815 | rcu_assign_pointer(wiphy->regd, regd); | |
1816 | } | |
1817 | ||
21636c7f LR |
1818 | |
1819 | driver_request->intersect = treatment == REG_REQ_INTERSECT; | |
1820 | driver_request->processed = false; | |
5ad6ef5e | 1821 | |
05f1a3ea | 1822 | reg_update_last_request(driver_request); |
21636c7f LR |
1823 | |
1824 | /* | |
1825 | * Since CRDA will not be called in this case as we already | |
1826 | * have applied the requested regulatory domain before we just | |
1827 | * inform userspace we have processed the request | |
1828 | */ | |
1829 | if (treatment == REG_REQ_ALREADY_SET) { | |
1830 | nl80211_send_reg_change_event(driver_request); | |
1831 | reg_set_request_processed(); | |
1832 | return treatment; | |
1833 | } | |
1834 | ||
fe6631ff | 1835 | return reg_call_crda(driver_request); |
21636c7f LR |
1836 | } |
1837 | ||
b23e7a9e LR |
1838 | static enum reg_request_treatment |
1839 | __reg_process_hint_country_ie(struct wiphy *wiphy, | |
1840 | struct regulatory_request *country_ie_request) | |
1841 | { | |
1842 | struct wiphy *last_wiphy = NULL; | |
1843 | struct regulatory_request *lr = get_last_request(); | |
1844 | ||
1845 | if (reg_request_cell_base(lr)) { | |
1846 | /* Trust a Cell base station over the AP's country IE */ | |
1847 | if (regdom_changes(country_ie_request->alpha2)) | |
1848 | return REG_REQ_IGNORE; | |
1849 | return REG_REQ_ALREADY_SET; | |
2a901468 LR |
1850 | } else { |
1851 | if (wiphy->regulatory_flags & REGULATORY_COUNTRY_IE_IGNORE) | |
1852 | return REG_REQ_IGNORE; | |
b23e7a9e LR |
1853 | } |
1854 | ||
b23e7a9e LR |
1855 | if (unlikely(!is_an_alpha2(country_ie_request->alpha2))) |
1856 | return -EINVAL; | |
2f1c6c57 LR |
1857 | |
1858 | if (lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE) | |
1859 | return REG_REQ_OK; | |
1860 | ||
1861 | last_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx); | |
1862 | ||
1863 | if (last_wiphy != wiphy) { | |
b23e7a9e | 1864 | /* |
2f1c6c57 LR |
1865 | * Two cards with two APs claiming different |
1866 | * Country IE alpha2s. We could | |
1867 | * intersect them, but that seems unlikely | |
1868 | * to be correct. Reject second one for now. | |
b23e7a9e | 1869 | */ |
2f1c6c57 LR |
1870 | if (regdom_changes(country_ie_request->alpha2)) |
1871 | return REG_REQ_IGNORE; | |
b23e7a9e LR |
1872 | return REG_REQ_ALREADY_SET; |
1873 | } | |
2f1c6c57 LR |
1874 | /* |
1875 | * Two consecutive Country IE hints on the same wiphy. | |
1876 | * This should be picked up early by the driver/stack | |
1877 | */ | |
1878 | if (WARN_ON(regdom_changes(country_ie_request->alpha2))) | |
1879 | return REG_REQ_OK; | |
1880 | return REG_REQ_ALREADY_SET; | |
b23e7a9e LR |
1881 | } |
1882 | ||
d1c96a9a | 1883 | /** |
b23e7a9e LR |
1884 | * reg_process_hint_country_ie - process regulatory requests from country IEs |
1885 | * @country_ie_request: a regulatory request from a country IE | |
d1c96a9a | 1886 | * |
b23e7a9e LR |
1887 | * The wireless subsystem can use this function to process |
1888 | * a regulatory request issued by a country Information Element. | |
d1c96a9a | 1889 | * |
2f92212b | 1890 | * Returns one of the different reg request treatment values. |
d1c96a9a | 1891 | */ |
2f92212b | 1892 | static enum reg_request_treatment |
b23e7a9e LR |
1893 | reg_process_hint_country_ie(struct wiphy *wiphy, |
1894 | struct regulatory_request *country_ie_request) | |
b2e1b302 | 1895 | { |
2f92212b | 1896 | enum reg_request_treatment treatment; |
761cf7ec | 1897 | |
b23e7a9e | 1898 | treatment = __reg_process_hint_country_ie(wiphy, country_ie_request); |
9c96477d | 1899 | |
2f92212b | 1900 | switch (treatment) { |
2f92212b JB |
1901 | case REG_REQ_OK: |
1902 | break; | |
b23e7a9e | 1903 | case REG_REQ_IGNORE: |
52616f2b | 1904 | case REG_REQ_USER_HINT_HANDLED: |
b23e7a9e LR |
1905 | /* fall through */ |
1906 | case REG_REQ_ALREADY_SET: | |
c888393b | 1907 | reg_free_request(country_ie_request); |
b23e7a9e LR |
1908 | return treatment; |
1909 | case REG_REQ_INTERSECT: | |
c888393b | 1910 | reg_free_request(country_ie_request); |
fb1fc7ad | 1911 | /* |
b23e7a9e LR |
1912 | * This doesn't happen yet, not sure we |
1913 | * ever want to support it for this case. | |
fb1fc7ad | 1914 | */ |
b23e7a9e LR |
1915 | WARN_ONCE(1, "Unexpected intersection for country IEs"); |
1916 | return REG_REQ_IGNORE; | |
3e0c3ff3 | 1917 | } |
b2e1b302 | 1918 | |
b23e7a9e LR |
1919 | country_ie_request->intersect = false; |
1920 | country_ie_request->processed = false; | |
5ad6ef5e | 1921 | |
05f1a3ea | 1922 | reg_update_last_request(country_ie_request); |
3e0c3ff3 | 1923 | |
fe6631ff | 1924 | return reg_call_crda(country_ie_request); |
b2e1b302 LR |
1925 | } |
1926 | ||
30a548c7 | 1927 | /* This processes *all* regulatory hints */ |
1daa37c7 | 1928 | static void reg_process_hint(struct regulatory_request *reg_request) |
fe33eb39 | 1929 | { |
fe33eb39 | 1930 | struct wiphy *wiphy = NULL; |
b3eb7f3f | 1931 | enum reg_request_treatment treatment; |
fe33eb39 | 1932 | |
f4173766 | 1933 | if (reg_request->wiphy_idx != WIPHY_IDX_INVALID) |
fe33eb39 LR |
1934 | wiphy = wiphy_idx_to_wiphy(reg_request->wiphy_idx); |
1935 | ||
b3eb7f3f LR |
1936 | switch (reg_request->initiator) { |
1937 | case NL80211_REGDOM_SET_BY_CORE: | |
1938 | reg_process_hint_core(reg_request); | |
1939 | return; | |
1940 | case NL80211_REGDOM_SET_BY_USER: | |
0d97a619 | 1941 | treatment = reg_process_hint_user(reg_request); |
50c11eb9 | 1942 | if (treatment == REG_REQ_IGNORE || |
4d3df547 AN |
1943 | treatment == REG_REQ_ALREADY_SET || |
1944 | treatment == REG_REQ_USER_HINT_HANDLED) | |
0d97a619 | 1945 | return; |
845f3351 SD |
1946 | queue_delayed_work(system_power_efficient_wq, |
1947 | ®_timeout, msecs_to_jiffies(3142)); | |
0d97a619 | 1948 | return; |
b3eb7f3f | 1949 | case NL80211_REGDOM_SET_BY_DRIVER: |
772f0389 IP |
1950 | if (!wiphy) |
1951 | goto out_free; | |
21636c7f LR |
1952 | treatment = reg_process_hint_driver(wiphy, reg_request); |
1953 | break; | |
b3eb7f3f | 1954 | case NL80211_REGDOM_SET_BY_COUNTRY_IE: |
772f0389 IP |
1955 | if (!wiphy) |
1956 | goto out_free; | |
b23e7a9e | 1957 | treatment = reg_process_hint_country_ie(wiphy, reg_request); |
b3eb7f3f LR |
1958 | break; |
1959 | default: | |
1960 | WARN(1, "invalid initiator %d\n", reg_request->initiator); | |
772f0389 | 1961 | goto out_free; |
b3eb7f3f LR |
1962 | } |
1963 | ||
b23e7a9e LR |
1964 | /* This is required so that the orig_* parameters are saved */ |
1965 | if (treatment == REG_REQ_ALREADY_SET && wiphy && | |
a2f73b6c | 1966 | wiphy->regulatory_flags & REGULATORY_STRICT_REG) |
b23e7a9e | 1967 | wiphy_update_regulatory(wiphy, reg_request->initiator); |
772f0389 IP |
1968 | |
1969 | return; | |
1970 | ||
1971 | out_free: | |
c888393b | 1972 | reg_free_request(reg_request); |
fe33eb39 LR |
1973 | } |
1974 | ||
b2e253cf LR |
1975 | /* |
1976 | * Processes regulatory hints, this is all the NL80211_REGDOM_SET_BY_* | |
1977 | * Regulatory hints come on a first come first serve basis and we | |
1978 | * must process each one atomically. | |
1979 | */ | |
fe33eb39 | 1980 | static void reg_process_pending_hints(void) |
b0e2880b | 1981 | { |
c492db37 | 1982 | struct regulatory_request *reg_request, *lr; |
fe33eb39 | 1983 | |
c492db37 | 1984 | lr = get_last_request(); |
b0e2880b | 1985 | |
b2e253cf | 1986 | /* When last_request->processed becomes true this will be rescheduled */ |
c492db37 | 1987 | if (lr && !lr->processed) { |
96cce12f | 1988 | reg_process_hint(lr); |
5fe231e8 | 1989 | return; |
b2e253cf LR |
1990 | } |
1991 | ||
fe33eb39 | 1992 | spin_lock(®_requests_lock); |
fe33eb39 | 1993 | |
b2e253cf | 1994 | if (list_empty(®_requests_list)) { |
d951c1dd | 1995 | spin_unlock(®_requests_lock); |
5fe231e8 | 1996 | return; |
fe33eb39 | 1997 | } |
b2e253cf LR |
1998 | |
1999 | reg_request = list_first_entry(®_requests_list, | |
2000 | struct regulatory_request, | |
2001 | list); | |
2002 | list_del_init(®_request->list); | |
2003 | ||
fe33eb39 | 2004 | spin_unlock(®_requests_lock); |
b0e2880b | 2005 | |
1daa37c7 | 2006 | reg_process_hint(reg_request); |
fe33eb39 LR |
2007 | } |
2008 | ||
e38f8a7a LR |
2009 | /* Processes beacon hints -- this has nothing to do with country IEs */ |
2010 | static void reg_process_pending_beacon_hints(void) | |
2011 | { | |
79c97e97 | 2012 | struct cfg80211_registered_device *rdev; |
e38f8a7a LR |
2013 | struct reg_beacon *pending_beacon, *tmp; |
2014 | ||
e38f8a7a LR |
2015 | /* This goes through the _pending_ beacon list */ |
2016 | spin_lock_bh(®_pending_beacons_lock); | |
2017 | ||
e38f8a7a LR |
2018 | list_for_each_entry_safe(pending_beacon, tmp, |
2019 | ®_pending_beacons, list) { | |
e38f8a7a LR |
2020 | list_del_init(&pending_beacon->list); |
2021 | ||
2022 | /* Applies the beacon hint to current wiphys */ | |
79c97e97 JB |
2023 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) |
2024 | wiphy_update_new_beacon(&rdev->wiphy, pending_beacon); | |
e38f8a7a LR |
2025 | |
2026 | /* Remembers the beacon hint for new wiphys or reg changes */ | |
2027 | list_add_tail(&pending_beacon->list, ®_beacon_list); | |
2028 | } | |
2029 | ||
2030 | spin_unlock_bh(®_pending_beacons_lock); | |
e38f8a7a LR |
2031 | } |
2032 | ||
fe33eb39 LR |
2033 | static void reg_todo(struct work_struct *work) |
2034 | { | |
5fe231e8 | 2035 | rtnl_lock(); |
fe33eb39 | 2036 | reg_process_pending_hints(); |
e38f8a7a | 2037 | reg_process_pending_beacon_hints(); |
5fe231e8 | 2038 | rtnl_unlock(); |
fe33eb39 LR |
2039 | } |
2040 | ||
fe33eb39 LR |
2041 | static void queue_regulatory_request(struct regulatory_request *request) |
2042 | { | |
d4f2c881 JB |
2043 | request->alpha2[0] = toupper(request->alpha2[0]); |
2044 | request->alpha2[1] = toupper(request->alpha2[1]); | |
c61029c7 | 2045 | |
fe33eb39 LR |
2046 | spin_lock(®_requests_lock); |
2047 | list_add_tail(&request->list, ®_requests_list); | |
2048 | spin_unlock(®_requests_lock); | |
2049 | ||
2050 | schedule_work(®_work); | |
2051 | } | |
2052 | ||
09d989d1 LR |
2053 | /* |
2054 | * Core regulatory hint -- happens during cfg80211_init() | |
2055 | * and when we restore regulatory settings. | |
2056 | */ | |
ba25c141 LR |
2057 | static int regulatory_hint_core(const char *alpha2) |
2058 | { | |
2059 | struct regulatory_request *request; | |
2060 | ||
1a919318 | 2061 | request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); |
ba25c141 LR |
2062 | if (!request) |
2063 | return -ENOMEM; | |
2064 | ||
2065 | request->alpha2[0] = alpha2[0]; | |
2066 | request->alpha2[1] = alpha2[1]; | |
7db90f4a | 2067 | request->initiator = NL80211_REGDOM_SET_BY_CORE; |
ba25c141 | 2068 | |
31e99729 | 2069 | queue_regulatory_request(request); |
5078b2e3 | 2070 | |
fe33eb39 | 2071 | return 0; |
ba25c141 LR |
2072 | } |
2073 | ||
fe33eb39 | 2074 | /* User hints */ |
57b5ce07 LR |
2075 | int regulatory_hint_user(const char *alpha2, |
2076 | enum nl80211_user_reg_hint_type user_reg_hint_type) | |
b2e1b302 | 2077 | { |
fe33eb39 LR |
2078 | struct regulatory_request *request; |
2079 | ||
fdc9d7b2 JB |
2080 | if (WARN_ON(!alpha2)) |
2081 | return -EINVAL; | |
b2e1b302 | 2082 | |
fe33eb39 LR |
2083 | request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); |
2084 | if (!request) | |
2085 | return -ENOMEM; | |
2086 | ||
f4173766 | 2087 | request->wiphy_idx = WIPHY_IDX_INVALID; |
fe33eb39 LR |
2088 | request->alpha2[0] = alpha2[0]; |
2089 | request->alpha2[1] = alpha2[1]; | |
e12822e1 | 2090 | request->initiator = NL80211_REGDOM_SET_BY_USER; |
57b5ce07 | 2091 | request->user_reg_hint_type = user_reg_hint_type; |
fe33eb39 LR |
2092 | |
2093 | queue_regulatory_request(request); | |
2094 | ||
2095 | return 0; | |
2096 | } | |
2097 | ||
52616f2b IP |
2098 | int regulatory_hint_indoor_user(void) |
2099 | { | |
2100 | struct regulatory_request *request; | |
2101 | ||
2102 | request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); | |
2103 | if (!request) | |
2104 | return -ENOMEM; | |
2105 | ||
2106 | request->wiphy_idx = WIPHY_IDX_INVALID; | |
2107 | request->initiator = NL80211_REGDOM_SET_BY_USER; | |
2108 | request->user_reg_hint_type = NL80211_USER_REG_HINT_INDOOR; | |
2109 | queue_regulatory_request(request); | |
2110 | ||
2111 | return 0; | |
2112 | } | |
2113 | ||
fe33eb39 LR |
2114 | /* Driver hints */ |
2115 | int regulatory_hint(struct wiphy *wiphy, const char *alpha2) | |
2116 | { | |
2117 | struct regulatory_request *request; | |
2118 | ||
fdc9d7b2 JB |
2119 | if (WARN_ON(!alpha2 || !wiphy)) |
2120 | return -EINVAL; | |
fe33eb39 | 2121 | |
4f7b9140 LR |
2122 | wiphy->regulatory_flags &= ~REGULATORY_CUSTOM_REG; |
2123 | ||
fe33eb39 LR |
2124 | request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); |
2125 | if (!request) | |
2126 | return -ENOMEM; | |
2127 | ||
2128 | request->wiphy_idx = get_wiphy_idx(wiphy); | |
2129 | ||
fe33eb39 LR |
2130 | request->alpha2[0] = alpha2[0]; |
2131 | request->alpha2[1] = alpha2[1]; | |
7db90f4a | 2132 | request->initiator = NL80211_REGDOM_SET_BY_DRIVER; |
fe33eb39 LR |
2133 | |
2134 | queue_regulatory_request(request); | |
2135 | ||
2136 | return 0; | |
b2e1b302 LR |
2137 | } |
2138 | EXPORT_SYMBOL(regulatory_hint); | |
2139 | ||
789fd033 LR |
2140 | void regulatory_hint_country_ie(struct wiphy *wiphy, enum ieee80211_band band, |
2141 | const u8 *country_ie, u8 country_ie_len) | |
3f2355cb | 2142 | { |
3f2355cb | 2143 | char alpha2[2]; |
3f2355cb | 2144 | enum environment_cap env = ENVIRON_ANY; |
db2424c5 | 2145 | struct regulatory_request *request = NULL, *lr; |
d335fe63 | 2146 | |
3f2355cb LR |
2147 | /* IE len must be evenly divisible by 2 */ |
2148 | if (country_ie_len & 0x01) | |
db2424c5 | 2149 | return; |
3f2355cb LR |
2150 | |
2151 | if (country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN) | |
db2424c5 JB |
2152 | return; |
2153 | ||
2154 | request = kzalloc(sizeof(*request), GFP_KERNEL); | |
2155 | if (!request) | |
2156 | return; | |
3f2355cb | 2157 | |
3f2355cb LR |
2158 | alpha2[0] = country_ie[0]; |
2159 | alpha2[1] = country_ie[1]; | |
2160 | ||
2161 | if (country_ie[2] == 'I') | |
2162 | env = ENVIRON_INDOOR; | |
2163 | else if (country_ie[2] == 'O') | |
2164 | env = ENVIRON_OUTDOOR; | |
2165 | ||
db2424c5 JB |
2166 | rcu_read_lock(); |
2167 | lr = get_last_request(); | |
2168 | ||
2169 | if (unlikely(!lr)) | |
2170 | goto out; | |
2171 | ||
fb1fc7ad | 2172 | /* |
8b19e6ca | 2173 | * We will run this only upon a successful connection on cfg80211. |
4b44c8bc | 2174 | * We leave conflict resolution to the workqueue, where can hold |
5fe231e8 | 2175 | * the RTNL. |
fb1fc7ad | 2176 | */ |
c492db37 JB |
2177 | if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE && |
2178 | lr->wiphy_idx != WIPHY_IDX_INVALID) | |
4b44c8bc | 2179 | goto out; |
3f2355cb | 2180 | |
fe33eb39 | 2181 | request->wiphy_idx = get_wiphy_idx(wiphy); |
4f366c5d JL |
2182 | request->alpha2[0] = alpha2[0]; |
2183 | request->alpha2[1] = alpha2[1]; | |
7db90f4a | 2184 | request->initiator = NL80211_REGDOM_SET_BY_COUNTRY_IE; |
fe33eb39 LR |
2185 | request->country_ie_env = env; |
2186 | ||
fe33eb39 | 2187 | queue_regulatory_request(request); |
db2424c5 | 2188 | request = NULL; |
3f2355cb | 2189 | out: |
db2424c5 JB |
2190 | kfree(request); |
2191 | rcu_read_unlock(); | |
3f2355cb | 2192 | } |
b2e1b302 | 2193 | |
09d989d1 LR |
2194 | static void restore_alpha2(char *alpha2, bool reset_user) |
2195 | { | |
2196 | /* indicates there is no alpha2 to consider for restoration */ | |
2197 | alpha2[0] = '9'; | |
2198 | alpha2[1] = '7'; | |
2199 | ||
2200 | /* The user setting has precedence over the module parameter */ | |
2201 | if (is_user_regdom_saved()) { | |
2202 | /* Unless we're asked to ignore it and reset it */ | |
2203 | if (reset_user) { | |
1a919318 | 2204 | REG_DBG_PRINT("Restoring regulatory settings including user preference\n"); |
09d989d1 LR |
2205 | user_alpha2[0] = '9'; |
2206 | user_alpha2[1] = '7'; | |
2207 | ||
2208 | /* | |
2209 | * If we're ignoring user settings, we still need to | |
2210 | * check the module parameter to ensure we put things | |
2211 | * back as they were for a full restore. | |
2212 | */ | |
2213 | if (!is_world_regdom(ieee80211_regdom)) { | |
1a919318 JB |
2214 | REG_DBG_PRINT("Keeping preference on module parameter ieee80211_regdom: %c%c\n", |
2215 | ieee80211_regdom[0], ieee80211_regdom[1]); | |
09d989d1 LR |
2216 | alpha2[0] = ieee80211_regdom[0]; |
2217 | alpha2[1] = ieee80211_regdom[1]; | |
2218 | } | |
2219 | } else { | |
1a919318 JB |
2220 | REG_DBG_PRINT("Restoring regulatory settings while preserving user preference for: %c%c\n", |
2221 | user_alpha2[0], user_alpha2[1]); | |
09d989d1 LR |
2222 | alpha2[0] = user_alpha2[0]; |
2223 | alpha2[1] = user_alpha2[1]; | |
2224 | } | |
2225 | } else if (!is_world_regdom(ieee80211_regdom)) { | |
1a919318 JB |
2226 | REG_DBG_PRINT("Keeping preference on module parameter ieee80211_regdom: %c%c\n", |
2227 | ieee80211_regdom[0], ieee80211_regdom[1]); | |
09d989d1 LR |
2228 | alpha2[0] = ieee80211_regdom[0]; |
2229 | alpha2[1] = ieee80211_regdom[1]; | |
2230 | } else | |
d91e41b6 | 2231 | REG_DBG_PRINT("Restoring regulatory settings\n"); |
09d989d1 LR |
2232 | } |
2233 | ||
5ce543d1 RM |
2234 | static void restore_custom_reg_settings(struct wiphy *wiphy) |
2235 | { | |
2236 | struct ieee80211_supported_band *sband; | |
2237 | enum ieee80211_band band; | |
2238 | struct ieee80211_channel *chan; | |
2239 | int i; | |
2240 | ||
2241 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) { | |
2242 | sband = wiphy->bands[band]; | |
2243 | if (!sband) | |
2244 | continue; | |
2245 | for (i = 0; i < sband->n_channels; i++) { | |
2246 | chan = &sband->channels[i]; | |
2247 | chan->flags = chan->orig_flags; | |
2248 | chan->max_antenna_gain = chan->orig_mag; | |
2249 | chan->max_power = chan->orig_mpwr; | |
899852af | 2250 | chan->beacon_found = false; |
5ce543d1 RM |
2251 | } |
2252 | } | |
2253 | } | |
2254 | ||
09d989d1 LR |
2255 | /* |
2256 | * Restoring regulatory settings involves ingoring any | |
2257 | * possibly stale country IE information and user regulatory | |
2258 | * settings if so desired, this includes any beacon hints | |
2259 | * learned as we could have traveled outside to another country | |
2260 | * after disconnection. To restore regulatory settings we do | |
2261 | * exactly what we did at bootup: | |
2262 | * | |
2263 | * - send a core regulatory hint | |
2264 | * - send a user regulatory hint if applicable | |
2265 | * | |
2266 | * Device drivers that send a regulatory hint for a specific country | |
2267 | * keep their own regulatory domain on wiphy->regd so that does does | |
2268 | * not need to be remembered. | |
2269 | */ | |
2270 | static void restore_regulatory_settings(bool reset_user) | |
2271 | { | |
2272 | char alpha2[2]; | |
cee0bec5 | 2273 | char world_alpha2[2]; |
09d989d1 | 2274 | struct reg_beacon *reg_beacon, *btmp; |
14609555 LR |
2275 | struct regulatory_request *reg_request, *tmp; |
2276 | LIST_HEAD(tmp_reg_req_list); | |
5ce543d1 | 2277 | struct cfg80211_registered_device *rdev; |
09d989d1 | 2278 | |
5fe231e8 JB |
2279 | ASSERT_RTNL(); |
2280 | ||
52616f2b IP |
2281 | reg_is_indoor = false; |
2282 | ||
2d319867 | 2283 | reset_regdomains(true, &world_regdom); |
09d989d1 LR |
2284 | restore_alpha2(alpha2, reset_user); |
2285 | ||
14609555 LR |
2286 | /* |
2287 | * If there's any pending requests we simply | |
2288 | * stash them to a temporary pending queue and | |
2289 | * add then after we've restored regulatory | |
2290 | * settings. | |
2291 | */ | |
2292 | spin_lock(®_requests_lock); | |
fea9bced JB |
2293 | list_for_each_entry_safe(reg_request, tmp, ®_requests_list, list) { |
2294 | if (reg_request->initiator != NL80211_REGDOM_SET_BY_USER) | |
2295 | continue; | |
2296 | list_move_tail(®_request->list, &tmp_reg_req_list); | |
14609555 LR |
2297 | } |
2298 | spin_unlock(®_requests_lock); | |
2299 | ||
09d989d1 LR |
2300 | /* Clear beacon hints */ |
2301 | spin_lock_bh(®_pending_beacons_lock); | |
fea9bced JB |
2302 | list_for_each_entry_safe(reg_beacon, btmp, ®_pending_beacons, list) { |
2303 | list_del(®_beacon->list); | |
2304 | kfree(reg_beacon); | |
09d989d1 LR |
2305 | } |
2306 | spin_unlock_bh(®_pending_beacons_lock); | |
2307 | ||
fea9bced JB |
2308 | list_for_each_entry_safe(reg_beacon, btmp, ®_beacon_list, list) { |
2309 | list_del(®_beacon->list); | |
2310 | kfree(reg_beacon); | |
09d989d1 LR |
2311 | } |
2312 | ||
2313 | /* First restore to the basic regulatory settings */ | |
379b82f4 JB |
2314 | world_alpha2[0] = cfg80211_world_regdom->alpha2[0]; |
2315 | world_alpha2[1] = cfg80211_world_regdom->alpha2[1]; | |
09d989d1 | 2316 | |
5ce543d1 | 2317 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) { |
a2f73b6c | 2318 | if (rdev->wiphy.regulatory_flags & REGULATORY_CUSTOM_REG) |
5ce543d1 RM |
2319 | restore_custom_reg_settings(&rdev->wiphy); |
2320 | } | |
2321 | ||
cee0bec5 | 2322 | regulatory_hint_core(world_alpha2); |
09d989d1 LR |
2323 | |
2324 | /* | |
2325 | * This restores the ieee80211_regdom module parameter | |
2326 | * preference or the last user requested regulatory | |
2327 | * settings, user regulatory settings takes precedence. | |
2328 | */ | |
2329 | if (is_an_alpha2(alpha2)) | |
57b5ce07 | 2330 | regulatory_hint_user(user_alpha2, NL80211_USER_REG_HINT_USER); |
09d989d1 | 2331 | |
14609555 | 2332 | spin_lock(®_requests_lock); |
11cff96c | 2333 | list_splice_tail_init(&tmp_reg_req_list, ®_requests_list); |
14609555 LR |
2334 | spin_unlock(®_requests_lock); |
2335 | ||
14609555 LR |
2336 | REG_DBG_PRINT("Kicking the queue\n"); |
2337 | ||
2338 | schedule_work(®_work); | |
2339 | } | |
09d989d1 LR |
2340 | |
2341 | void regulatory_hint_disconnect(void) | |
2342 | { | |
1a919318 | 2343 | REG_DBG_PRINT("All devices are disconnected, going to restore regulatory settings\n"); |
09d989d1 LR |
2344 | restore_regulatory_settings(false); |
2345 | } | |
2346 | ||
e38f8a7a LR |
2347 | static bool freq_is_chan_12_13_14(u16 freq) |
2348 | { | |
59eb21a6 BR |
2349 | if (freq == ieee80211_channel_to_frequency(12, IEEE80211_BAND_2GHZ) || |
2350 | freq == ieee80211_channel_to_frequency(13, IEEE80211_BAND_2GHZ) || | |
2351 | freq == ieee80211_channel_to_frequency(14, IEEE80211_BAND_2GHZ)) | |
e38f8a7a LR |
2352 | return true; |
2353 | return false; | |
2354 | } | |
2355 | ||
3ebfa6e7 LR |
2356 | static bool pending_reg_beacon(struct ieee80211_channel *beacon_chan) |
2357 | { | |
2358 | struct reg_beacon *pending_beacon; | |
2359 | ||
2360 | list_for_each_entry(pending_beacon, ®_pending_beacons, list) | |
2361 | if (beacon_chan->center_freq == | |
2362 | pending_beacon->chan.center_freq) | |
2363 | return true; | |
2364 | return false; | |
2365 | } | |
2366 | ||
e38f8a7a LR |
2367 | int regulatory_hint_found_beacon(struct wiphy *wiphy, |
2368 | struct ieee80211_channel *beacon_chan, | |
2369 | gfp_t gfp) | |
2370 | { | |
2371 | struct reg_beacon *reg_beacon; | |
3ebfa6e7 | 2372 | bool processing; |
e38f8a7a | 2373 | |
1a919318 JB |
2374 | if (beacon_chan->beacon_found || |
2375 | beacon_chan->flags & IEEE80211_CHAN_RADAR || | |
e38f8a7a | 2376 | (beacon_chan->band == IEEE80211_BAND_2GHZ && |
1a919318 | 2377 | !freq_is_chan_12_13_14(beacon_chan->center_freq))) |
e38f8a7a LR |
2378 | return 0; |
2379 | ||
3ebfa6e7 LR |
2380 | spin_lock_bh(®_pending_beacons_lock); |
2381 | processing = pending_reg_beacon(beacon_chan); | |
2382 | spin_unlock_bh(®_pending_beacons_lock); | |
2383 | ||
2384 | if (processing) | |
e38f8a7a LR |
2385 | return 0; |
2386 | ||
2387 | reg_beacon = kzalloc(sizeof(struct reg_beacon), gfp); | |
2388 | if (!reg_beacon) | |
2389 | return -ENOMEM; | |
2390 | ||
1a919318 | 2391 | REG_DBG_PRINT("Found new beacon on frequency: %d MHz (Ch %d) on %s\n", |
4113f751 LR |
2392 | beacon_chan->center_freq, |
2393 | ieee80211_frequency_to_channel(beacon_chan->center_freq), | |
2394 | wiphy_name(wiphy)); | |
2395 | ||
e38f8a7a | 2396 | memcpy(®_beacon->chan, beacon_chan, |
1a919318 | 2397 | sizeof(struct ieee80211_channel)); |
e38f8a7a LR |
2398 | |
2399 | /* | |
2400 | * Since we can be called from BH or and non-BH context | |
2401 | * we must use spin_lock_bh() | |
2402 | */ | |
2403 | spin_lock_bh(®_pending_beacons_lock); | |
2404 | list_add_tail(®_beacon->list, ®_pending_beacons); | |
2405 | spin_unlock_bh(®_pending_beacons_lock); | |
2406 | ||
2407 | schedule_work(®_work); | |
2408 | ||
2409 | return 0; | |
2410 | } | |
2411 | ||
a3d2eaf0 | 2412 | static void print_rd_rules(const struct ieee80211_regdomain *rd) |
b2e1b302 LR |
2413 | { |
2414 | unsigned int i; | |
a3d2eaf0 JB |
2415 | const struct ieee80211_reg_rule *reg_rule = NULL; |
2416 | const struct ieee80211_freq_range *freq_range = NULL; | |
2417 | const struct ieee80211_power_rule *power_rule = NULL; | |
089027e5 | 2418 | char bw[32], cac_time[32]; |
b2e1b302 | 2419 | |
089027e5 | 2420 | pr_info(" (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp), (dfs_cac_time)\n"); |
b2e1b302 LR |
2421 | |
2422 | for (i = 0; i < rd->n_reg_rules; i++) { | |
2423 | reg_rule = &rd->reg_rules[i]; | |
2424 | freq_range = ®_rule->freq_range; | |
2425 | power_rule = ®_rule->power_rule; | |
2426 | ||
b0dfd2ea JD |
2427 | if (reg_rule->flags & NL80211_RRF_AUTO_BW) |
2428 | snprintf(bw, sizeof(bw), "%d KHz, %d KHz AUTO", | |
2429 | freq_range->max_bandwidth_khz, | |
97524820 JD |
2430 | reg_get_max_bandwidth(rd, reg_rule)); |
2431 | else | |
b0dfd2ea | 2432 | snprintf(bw, sizeof(bw), "%d KHz", |
97524820 JD |
2433 | freq_range->max_bandwidth_khz); |
2434 | ||
089027e5 JD |
2435 | if (reg_rule->flags & NL80211_RRF_DFS) |
2436 | scnprintf(cac_time, sizeof(cac_time), "%u s", | |
2437 | reg_rule->dfs_cac_ms/1000); | |
2438 | else | |
2439 | scnprintf(cac_time, sizeof(cac_time), "N/A"); | |
2440 | ||
2441 | ||
fb1fc7ad LR |
2442 | /* |
2443 | * There may not be documentation for max antenna gain | |
2444 | * in certain regions | |
2445 | */ | |
b2e1b302 | 2446 | if (power_rule->max_antenna_gain) |
089027e5 | 2447 | pr_info(" (%d KHz - %d KHz @ %s), (%d mBi, %d mBm), (%s)\n", |
b2e1b302 LR |
2448 | freq_range->start_freq_khz, |
2449 | freq_range->end_freq_khz, | |
97524820 | 2450 | bw, |
b2e1b302 | 2451 | power_rule->max_antenna_gain, |
089027e5 JD |
2452 | power_rule->max_eirp, |
2453 | cac_time); | |
b2e1b302 | 2454 | else |
089027e5 | 2455 | pr_info(" (%d KHz - %d KHz @ %s), (N/A, %d mBm), (%s)\n", |
b2e1b302 LR |
2456 | freq_range->start_freq_khz, |
2457 | freq_range->end_freq_khz, | |
97524820 | 2458 | bw, |
089027e5 JD |
2459 | power_rule->max_eirp, |
2460 | cac_time); | |
b2e1b302 LR |
2461 | } |
2462 | } | |
2463 | ||
4c7d3982 | 2464 | bool reg_supported_dfs_region(enum nl80211_dfs_regions dfs_region) |
8b60b078 LR |
2465 | { |
2466 | switch (dfs_region) { | |
2467 | case NL80211_DFS_UNSET: | |
2468 | case NL80211_DFS_FCC: | |
2469 | case NL80211_DFS_ETSI: | |
2470 | case NL80211_DFS_JP: | |
2471 | return true; | |
2472 | default: | |
2473 | REG_DBG_PRINT("Ignoring uknown DFS master region: %d\n", | |
2474 | dfs_region); | |
2475 | return false; | |
2476 | } | |
2477 | } | |
2478 | ||
a3d2eaf0 | 2479 | static void print_regdomain(const struct ieee80211_regdomain *rd) |
b2e1b302 | 2480 | { |
c492db37 | 2481 | struct regulatory_request *lr = get_last_request(); |
b2e1b302 | 2482 | |
3f2355cb | 2483 | if (is_intersected_alpha2(rd->alpha2)) { |
c492db37 | 2484 | if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) { |
79c97e97 | 2485 | struct cfg80211_registered_device *rdev; |
c492db37 | 2486 | rdev = cfg80211_rdev_by_wiphy_idx(lr->wiphy_idx); |
79c97e97 | 2487 | if (rdev) { |
e9c0268f | 2488 | pr_info("Current regulatory domain updated by AP to: %c%c\n", |
79c97e97 JB |
2489 | rdev->country_ie_alpha2[0], |
2490 | rdev->country_ie_alpha2[1]); | |
3f2355cb | 2491 | } else |
e9c0268f | 2492 | pr_info("Current regulatory domain intersected:\n"); |
3f2355cb | 2493 | } else |
e9c0268f | 2494 | pr_info("Current regulatory domain intersected:\n"); |
1a919318 | 2495 | } else if (is_world_regdom(rd->alpha2)) { |
e9c0268f | 2496 | pr_info("World regulatory domain updated:\n"); |
1a919318 | 2497 | } else { |
b2e1b302 | 2498 | if (is_unknown_alpha2(rd->alpha2)) |
e9c0268f | 2499 | pr_info("Regulatory domain changed to driver built-in settings (unknown country)\n"); |
57b5ce07 | 2500 | else { |
c492db37 | 2501 | if (reg_request_cell_base(lr)) |
1a919318 | 2502 | pr_info("Regulatory domain changed to country: %c%c by Cell Station\n", |
57b5ce07 LR |
2503 | rd->alpha2[0], rd->alpha2[1]); |
2504 | else | |
1a919318 | 2505 | pr_info("Regulatory domain changed to country: %c%c\n", |
57b5ce07 LR |
2506 | rd->alpha2[0], rd->alpha2[1]); |
2507 | } | |
b2e1b302 | 2508 | } |
1a919318 | 2509 | |
3ef121b5 | 2510 | pr_info(" DFS Master region: %s", reg_dfs_region_str(rd->dfs_region)); |
b2e1b302 LR |
2511 | print_rd_rules(rd); |
2512 | } | |
2513 | ||
2df78167 | 2514 | static void print_regdomain_info(const struct ieee80211_regdomain *rd) |
b2e1b302 | 2515 | { |
e9c0268f | 2516 | pr_info("Regulatory domain: %c%c\n", rd->alpha2[0], rd->alpha2[1]); |
b2e1b302 LR |
2517 | print_rd_rules(rd); |
2518 | } | |
2519 | ||
3b9e5aca LR |
2520 | static int reg_set_rd_core(const struct ieee80211_regdomain *rd) |
2521 | { | |
2522 | if (!is_world_regdom(rd->alpha2)) | |
2523 | return -EINVAL; | |
2524 | update_world_regdomain(rd); | |
2525 | return 0; | |
2526 | } | |
2527 | ||
84721d44 LR |
2528 | static int reg_set_rd_user(const struct ieee80211_regdomain *rd, |
2529 | struct regulatory_request *user_request) | |
2530 | { | |
2531 | const struct ieee80211_regdomain *intersected_rd = NULL; | |
2532 | ||
84721d44 LR |
2533 | if (!regdom_changes(rd->alpha2)) |
2534 | return -EALREADY; | |
2535 | ||
2536 | if (!is_valid_rd(rd)) { | |
2537 | pr_err("Invalid regulatory domain detected:\n"); | |
2538 | print_regdomain_info(rd); | |
2539 | return -EINVAL; | |
2540 | } | |
2541 | ||
2542 | if (!user_request->intersect) { | |
2543 | reset_regdomains(false, rd); | |
2544 | return 0; | |
2545 | } | |
2546 | ||
2547 | intersected_rd = regdom_intersect(rd, get_cfg80211_regdom()); | |
2548 | if (!intersected_rd) | |
2549 | return -EINVAL; | |
2550 | ||
2551 | kfree(rd); | |
2552 | rd = NULL; | |
2553 | reset_regdomains(false, intersected_rd); | |
2554 | ||
2555 | return 0; | |
2556 | } | |
2557 | ||
f5fe3247 LR |
2558 | static int reg_set_rd_driver(const struct ieee80211_regdomain *rd, |
2559 | struct regulatory_request *driver_request) | |
b2e1b302 | 2560 | { |
e9763c3c | 2561 | const struct ieee80211_regdomain *regd; |
9c96477d | 2562 | const struct ieee80211_regdomain *intersected_rd = NULL; |
f5fe3247 | 2563 | const struct ieee80211_regdomain *tmp; |
806a9e39 | 2564 | struct wiphy *request_wiphy; |
6913b49a | 2565 | |
f5fe3247 | 2566 | if (is_world_regdom(rd->alpha2)) |
b2e1b302 LR |
2567 | return -EINVAL; |
2568 | ||
f5fe3247 LR |
2569 | if (!regdom_changes(rd->alpha2)) |
2570 | return -EALREADY; | |
b2e1b302 | 2571 | |
8375af3b | 2572 | if (!is_valid_rd(rd)) { |
e9c0268f | 2573 | pr_err("Invalid regulatory domain detected:\n"); |
8375af3b LR |
2574 | print_regdomain_info(rd); |
2575 | return -EINVAL; | |
b2e1b302 LR |
2576 | } |
2577 | ||
f5fe3247 LR |
2578 | request_wiphy = wiphy_idx_to_wiphy(driver_request->wiphy_idx); |
2579 | if (!request_wiphy) { | |
845f3351 SD |
2580 | queue_delayed_work(system_power_efficient_wq, |
2581 | ®_timeout, 0); | |
de3584bd JB |
2582 | return -ENODEV; |
2583 | } | |
806a9e39 | 2584 | |
f5fe3247 | 2585 | if (!driver_request->intersect) { |
558f6d32 LR |
2586 | if (request_wiphy->regd) |
2587 | return -EALREADY; | |
3e0c3ff3 | 2588 | |
e9763c3c JB |
2589 | regd = reg_copy_regd(rd); |
2590 | if (IS_ERR(regd)) | |
2591 | return PTR_ERR(regd); | |
3e0c3ff3 | 2592 | |
458f4f9e | 2593 | rcu_assign_pointer(request_wiphy->regd, regd); |
379b82f4 | 2594 | reset_regdomains(false, rd); |
b8295acd LR |
2595 | return 0; |
2596 | } | |
2597 | ||
f5fe3247 LR |
2598 | intersected_rd = regdom_intersect(rd, get_cfg80211_regdom()); |
2599 | if (!intersected_rd) | |
2600 | return -EINVAL; | |
b8295acd | 2601 | |
f5fe3247 LR |
2602 | /* |
2603 | * We can trash what CRDA provided now. | |
2604 | * However if a driver requested this specific regulatory | |
2605 | * domain we keep it for its private use | |
2606 | */ | |
2607 | tmp = get_wiphy_regdom(request_wiphy); | |
2608 | rcu_assign_pointer(request_wiphy->regd, rd); | |
2609 | rcu_free_regdom(tmp); | |
b8295acd | 2610 | |
f5fe3247 | 2611 | rd = NULL; |
b7566fc3 | 2612 | |
f5fe3247 | 2613 | reset_regdomains(false, intersected_rd); |
3e0c3ff3 | 2614 | |
f5fe3247 LR |
2615 | return 0; |
2616 | } | |
2617 | ||
01992406 LR |
2618 | static int reg_set_rd_country_ie(const struct ieee80211_regdomain *rd, |
2619 | struct regulatory_request *country_ie_request) | |
f5fe3247 LR |
2620 | { |
2621 | struct wiphy *request_wiphy; | |
b8295acd | 2622 | |
f5fe3247 LR |
2623 | if (!is_alpha2_set(rd->alpha2) && !is_an_alpha2(rd->alpha2) && |
2624 | !is_unknown_alpha2(rd->alpha2)) | |
2625 | return -EINVAL; | |
b8295acd | 2626 | |
f5fe3247 LR |
2627 | /* |
2628 | * Lets only bother proceeding on the same alpha2 if the current | |
2629 | * rd is non static (it means CRDA was present and was used last) | |
2630 | * and the pending request came in from a country IE | |
2631 | */ | |
2632 | ||
2633 | if (!is_valid_rd(rd)) { | |
2634 | pr_err("Invalid regulatory domain detected:\n"); | |
2635 | print_regdomain_info(rd); | |
2636 | return -EINVAL; | |
9c96477d LR |
2637 | } |
2638 | ||
01992406 | 2639 | request_wiphy = wiphy_idx_to_wiphy(country_ie_request->wiphy_idx); |
f5fe3247 | 2640 | if (!request_wiphy) { |
845f3351 SD |
2641 | queue_delayed_work(system_power_efficient_wq, |
2642 | ®_timeout, 0); | |
f5fe3247 LR |
2643 | return -ENODEV; |
2644 | } | |
b2e1b302 | 2645 | |
01992406 | 2646 | if (country_ie_request->intersect) |
f5fe3247 LR |
2647 | return -EINVAL; |
2648 | ||
2649 | reset_regdomains(false, rd); | |
2650 | return 0; | |
2651 | } | |
b2e1b302 | 2652 | |
fb1fc7ad LR |
2653 | /* |
2654 | * Use this call to set the current regulatory domain. Conflicts with | |
b2e1b302 | 2655 | * multiple drivers can be ironed out later. Caller must've already |
458f4f9e | 2656 | * kmalloc'd the rd structure. |
fb1fc7ad | 2657 | */ |
a3d2eaf0 | 2658 | int set_regdom(const struct ieee80211_regdomain *rd) |
b2e1b302 | 2659 | { |
c492db37 | 2660 | struct regulatory_request *lr; |
092008ab | 2661 | bool user_reset = false; |
b2e1b302 LR |
2662 | int r; |
2663 | ||
3b9e5aca LR |
2664 | if (!reg_is_valid_request(rd->alpha2)) { |
2665 | kfree(rd); | |
2666 | return -EINVAL; | |
2667 | } | |
2668 | ||
c492db37 | 2669 | lr = get_last_request(); |
abc7381b | 2670 | |
b2e1b302 | 2671 | /* Note that this doesn't update the wiphys, this is done below */ |
3b9e5aca LR |
2672 | switch (lr->initiator) { |
2673 | case NL80211_REGDOM_SET_BY_CORE: | |
2674 | r = reg_set_rd_core(rd); | |
2675 | break; | |
2676 | case NL80211_REGDOM_SET_BY_USER: | |
84721d44 | 2677 | r = reg_set_rd_user(rd, lr); |
092008ab | 2678 | user_reset = true; |
84721d44 | 2679 | break; |
3b9e5aca | 2680 | case NL80211_REGDOM_SET_BY_DRIVER: |
f5fe3247 LR |
2681 | r = reg_set_rd_driver(rd, lr); |
2682 | break; | |
3b9e5aca | 2683 | case NL80211_REGDOM_SET_BY_COUNTRY_IE: |
01992406 | 2684 | r = reg_set_rd_country_ie(rd, lr); |
3b9e5aca LR |
2685 | break; |
2686 | default: | |
2687 | WARN(1, "invalid initiator %d\n", lr->initiator); | |
2688 | return -EINVAL; | |
2689 | } | |
2690 | ||
d2372b31 | 2691 | if (r) { |
092008ab JD |
2692 | switch (r) { |
2693 | case -EALREADY: | |
95908535 | 2694 | reg_set_request_processed(); |
092008ab JD |
2695 | break; |
2696 | default: | |
2697 | /* Back to world regulatory in case of errors */ | |
2698 | restore_regulatory_settings(user_reset); | |
2699 | } | |
95908535 | 2700 | |
d2372b31 | 2701 | kfree(rd); |
38fd2143 | 2702 | return r; |
d2372b31 | 2703 | } |
b2e1b302 | 2704 | |
b2e1b302 | 2705 | /* This would make this whole thing pointless */ |
38fd2143 JB |
2706 | if (WARN_ON(!lr->intersect && rd != get_cfg80211_regdom())) |
2707 | return -EINVAL; | |
b2e1b302 LR |
2708 | |
2709 | /* update all wiphys now with the new established regulatory domain */ | |
c492db37 | 2710 | update_all_wiphy_regulatory(lr->initiator); |
b2e1b302 | 2711 | |
458f4f9e | 2712 | print_regdomain(get_cfg80211_regdom()); |
b2e1b302 | 2713 | |
c492db37 | 2714 | nl80211_send_reg_change_event(lr); |
73d54c9e | 2715 | |
b2e253cf LR |
2716 | reg_set_request_processed(); |
2717 | ||
38fd2143 | 2718 | return 0; |
b2e1b302 LR |
2719 | } |
2720 | ||
57b5ce07 LR |
2721 | void wiphy_regulatory_register(struct wiphy *wiphy) |
2722 | { | |
23df0b73 AN |
2723 | struct regulatory_request *lr; |
2724 | ||
57b5ce07 LR |
2725 | if (!reg_dev_ignore_cell_hint(wiphy)) |
2726 | reg_num_devs_support_basehint++; | |
2727 | ||
23df0b73 AN |
2728 | lr = get_last_request(); |
2729 | wiphy_update_regulatory(wiphy, lr->initiator); | |
57b5ce07 LR |
2730 | } |
2731 | ||
bfead080 | 2732 | void wiphy_regulatory_deregister(struct wiphy *wiphy) |
3f2355cb | 2733 | { |
0ad8acaf | 2734 | struct wiphy *request_wiphy = NULL; |
c492db37 | 2735 | struct regulatory_request *lr; |
761cf7ec | 2736 | |
c492db37 | 2737 | lr = get_last_request(); |
abc7381b | 2738 | |
57b5ce07 LR |
2739 | if (!reg_dev_ignore_cell_hint(wiphy)) |
2740 | reg_num_devs_support_basehint--; | |
2741 | ||
458f4f9e | 2742 | rcu_free_regdom(get_wiphy_regdom(wiphy)); |
34dd886c | 2743 | RCU_INIT_POINTER(wiphy->regd, NULL); |
0ef9ccdd | 2744 | |
c492db37 JB |
2745 | if (lr) |
2746 | request_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx); | |
806a9e39 | 2747 | |
0ef9ccdd | 2748 | if (!request_wiphy || request_wiphy != wiphy) |
38fd2143 | 2749 | return; |
0ef9ccdd | 2750 | |
c492db37 JB |
2751 | lr->wiphy_idx = WIPHY_IDX_INVALID; |
2752 | lr->country_ie_env = ENVIRON_ANY; | |
3f2355cb LR |
2753 | } |
2754 | ||
a90c7a31 LR |
2755 | static void reg_timeout_work(struct work_struct *work) |
2756 | { | |
1a919318 | 2757 | REG_DBG_PRINT("Timeout while waiting for CRDA to reply, restoring regulatory settings\n"); |
f77b86d7 | 2758 | rtnl_lock(); |
a90c7a31 | 2759 | restore_regulatory_settings(true); |
f77b86d7 | 2760 | rtnl_unlock(); |
a90c7a31 LR |
2761 | } |
2762 | ||
174e0cd2 IP |
2763 | /* |
2764 | * See http://www.fcc.gov/document/5-ghz-unlicensed-spectrum-unii, for | |
2765 | * UNII band definitions | |
2766 | */ | |
2767 | int cfg80211_get_unii(int freq) | |
2768 | { | |
2769 | /* UNII-1 */ | |
2770 | if (freq >= 5150 && freq <= 5250) | |
2771 | return 0; | |
2772 | ||
2773 | /* UNII-2A */ | |
2774 | if (freq > 5250 && freq <= 5350) | |
2775 | return 1; | |
2776 | ||
2777 | /* UNII-2B */ | |
2778 | if (freq > 5350 && freq <= 5470) | |
2779 | return 2; | |
2780 | ||
2781 | /* UNII-2C */ | |
2782 | if (freq > 5470 && freq <= 5725) | |
2783 | return 3; | |
2784 | ||
2785 | /* UNII-3 */ | |
2786 | if (freq > 5725 && freq <= 5825) | |
2787 | return 4; | |
2788 | ||
2789 | return -EINVAL; | |
2790 | } | |
2791 | ||
c8866e55 IP |
2792 | bool regulatory_indoor_allowed(void) |
2793 | { | |
2794 | return reg_is_indoor; | |
2795 | } | |
2796 | ||
2fcc9f73 | 2797 | int __init regulatory_init(void) |
b2e1b302 | 2798 | { |
bcf4f99b | 2799 | int err = 0; |
734366de | 2800 | |
b2e1b302 LR |
2801 | reg_pdev = platform_device_register_simple("regulatory", 0, NULL, 0); |
2802 | if (IS_ERR(reg_pdev)) | |
2803 | return PTR_ERR(reg_pdev); | |
734366de | 2804 | |
fe33eb39 | 2805 | spin_lock_init(®_requests_lock); |
e38f8a7a | 2806 | spin_lock_init(®_pending_beacons_lock); |
fe33eb39 | 2807 | |
80007efe LR |
2808 | reg_regdb_size_check(); |
2809 | ||
458f4f9e | 2810 | rcu_assign_pointer(cfg80211_regdomain, cfg80211_world_regdom); |
734366de | 2811 | |
09d989d1 LR |
2812 | user_alpha2[0] = '9'; |
2813 | user_alpha2[1] = '7'; | |
2814 | ||
ae9e4b0d | 2815 | /* We always try to get an update for the static regdomain */ |
458f4f9e | 2816 | err = regulatory_hint_core(cfg80211_world_regdom->alpha2); |
ba25c141 | 2817 | if (err) { |
bcf4f99b LR |
2818 | if (err == -ENOMEM) |
2819 | return err; | |
2820 | /* | |
2821 | * N.B. kobject_uevent_env() can fail mainly for when we're out | |
2822 | * memory which is handled and propagated appropriately above | |
2823 | * but it can also fail during a netlink_broadcast() or during | |
2824 | * early boot for call_usermodehelper(). For now treat these | |
2825 | * errors as non-fatal. | |
2826 | */ | |
e9c0268f | 2827 | pr_err("kobject_uevent_env() was unable to call CRDA during init\n"); |
bcf4f99b | 2828 | } |
734366de | 2829 | |
ae9e4b0d LR |
2830 | /* |
2831 | * Finally, if the user set the module parameter treat it | |
2832 | * as a user hint. | |
2833 | */ | |
2834 | if (!is_world_regdom(ieee80211_regdom)) | |
57b5ce07 LR |
2835 | regulatory_hint_user(ieee80211_regdom, |
2836 | NL80211_USER_REG_HINT_USER); | |
ae9e4b0d | 2837 | |
b2e1b302 LR |
2838 | return 0; |
2839 | } | |
2840 | ||
1a919318 | 2841 | void regulatory_exit(void) |
b2e1b302 | 2842 | { |
fe33eb39 | 2843 | struct regulatory_request *reg_request, *tmp; |
e38f8a7a | 2844 | struct reg_beacon *reg_beacon, *btmp; |
fe33eb39 LR |
2845 | |
2846 | cancel_work_sync(®_work); | |
a90c7a31 | 2847 | cancel_delayed_work_sync(®_timeout); |
fe33eb39 | 2848 | |
9027b149 | 2849 | /* Lock to suppress warnings */ |
38fd2143 | 2850 | rtnl_lock(); |
379b82f4 | 2851 | reset_regdomains(true, NULL); |
38fd2143 | 2852 | rtnl_unlock(); |
734366de | 2853 | |
58ebacc6 | 2854 | dev_set_uevent_suppress(®_pdev->dev, true); |
f6037d09 | 2855 | |
b2e1b302 | 2856 | platform_device_unregister(reg_pdev); |
734366de | 2857 | |
fea9bced JB |
2858 | list_for_each_entry_safe(reg_beacon, btmp, ®_pending_beacons, list) { |
2859 | list_del(®_beacon->list); | |
2860 | kfree(reg_beacon); | |
e38f8a7a | 2861 | } |
e38f8a7a | 2862 | |
fea9bced JB |
2863 | list_for_each_entry_safe(reg_beacon, btmp, ®_beacon_list, list) { |
2864 | list_del(®_beacon->list); | |
2865 | kfree(reg_beacon); | |
e38f8a7a LR |
2866 | } |
2867 | ||
fea9bced JB |
2868 | list_for_each_entry_safe(reg_request, tmp, ®_requests_list, list) { |
2869 | list_del(®_request->list); | |
2870 | kfree(reg_request); | |
fe33eb39 | 2871 | } |
8318d78a | 2872 | } |