Commit | Line | Data |
---|---|---|
8318d78a JB |
1 | /* |
2 | * Copyright 2002-2005, Instant802 Networks, Inc. | |
3 | * Copyright 2005-2006, Devicescape Software, Inc. | |
4 | * Copyright 2007 Johannes Berg <johannes@sipsolutions.net> | |
3b77d5ec | 5 | * Copyright 2008-2011 Luis R. Rodriguez <mcgrof@qca.qualcomm.com> |
8318d78a | 6 | * |
3b77d5ec LR |
7 | * Permission to use, copy, modify, and/or distribute this software for any |
8 | * purpose with or without fee is hereby granted, provided that the above | |
9 | * copyright notice and this permission notice appear in all copies. | |
10 | * | |
11 | * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES | |
12 | * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF | |
13 | * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR | |
14 | * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES | |
15 | * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN | |
16 | * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF | |
17 | * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. | |
8318d78a JB |
18 | */ |
19 | ||
3b77d5ec | 20 | |
b2e1b302 LR |
21 | /** |
22 | * DOC: Wireless regulatory infrastructure | |
8318d78a JB |
23 | * |
24 | * The usual implementation is for a driver to read a device EEPROM to | |
25 | * determine which regulatory domain it should be operating under, then | |
26 | * looking up the allowable channels in a driver-local table and finally | |
27 | * registering those channels in the wiphy structure. | |
28 | * | |
b2e1b302 LR |
29 | * Another set of compliance enforcement is for drivers to use their |
30 | * own compliance limits which can be stored on the EEPROM. The host | |
31 | * driver or firmware may ensure these are used. | |
32 | * | |
33 | * In addition to all this we provide an extra layer of regulatory | |
34 | * conformance. For drivers which do not have any regulatory | |
35 | * information CRDA provides the complete regulatory solution. | |
36 | * For others it provides a community effort on further restrictions | |
37 | * to enhance compliance. | |
38 | * | |
39 | * Note: When number of rules --> infinity we will not be able to | |
40 | * index on alpha2 any more, instead we'll probably have to | |
41 | * rely on some SHA1 checksum of the regdomain for example. | |
42 | * | |
8318d78a | 43 | */ |
e9c0268f JP |
44 | |
45 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt | |
46 | ||
8318d78a | 47 | #include <linux/kernel.h> |
bc3b2d7f | 48 | #include <linux/export.h> |
5a0e3ad6 | 49 | #include <linux/slab.h> |
b2e1b302 LR |
50 | #include <linux/list.h> |
51 | #include <linux/random.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 | ||
a042994d LR |
69 | static struct regulatory_request core_request_world = { |
70 | .initiator = NL80211_REGDOM_SET_BY_CORE, | |
71 | .alpha2[0] = '0', | |
72 | .alpha2[1] = '0', | |
73 | .intersect = false, | |
74 | .processed = true, | |
75 | .country_ie_env = ENVIRON_ANY, | |
76 | }; | |
77 | ||
5166ccd2 | 78 | /* Receipt of information from last regulatory request */ |
a042994d | 79 | static struct regulatory_request *last_request = &core_request_world; |
734366de | 80 | |
b2e1b302 LR |
81 | /* To trigger userspace events */ |
82 | static struct platform_device *reg_pdev; | |
8318d78a | 83 | |
4d9d88d1 SJR |
84 | static struct device_type reg_device_type = { |
85 | .uevent = reg_device_uevent, | |
86 | }; | |
87 | ||
fb1fc7ad LR |
88 | /* |
89 | * Central wireless core regulatory domains, we only need two, | |
734366de | 90 | * the current one and a world regulatory domain in case we have no |
fb1fc7ad LR |
91 | * information to give us an alpha2 |
92 | */ | |
f130347c | 93 | const struct ieee80211_regdomain *cfg80211_regdomain; |
734366de | 94 | |
abc7381b LR |
95 | /* |
96 | * Protects static reg.c components: | |
97 | * - cfg80211_world_regdom | |
98 | * - cfg80211_regdom | |
abc7381b | 99 | * - last_request |
57b5ce07 | 100 | * - reg_num_devs_support_basehint |
abc7381b | 101 | */ |
670b7f11 | 102 | static DEFINE_MUTEX(reg_mutex); |
46a5ebaf | 103 | |
57b5ce07 LR |
104 | /* |
105 | * Number of devices that registered to the core | |
106 | * that support cellular base station regulatory hints | |
107 | */ | |
108 | static int reg_num_devs_support_basehint; | |
109 | ||
46a5ebaf JB |
110 | static inline void assert_reg_lock(void) |
111 | { | |
112 | lockdep_assert_held(®_mutex); | |
113 | } | |
abc7381b | 114 | |
e38f8a7a | 115 | /* Used to queue up regulatory hints */ |
fe33eb39 LR |
116 | static LIST_HEAD(reg_requests_list); |
117 | static spinlock_t reg_requests_lock; | |
118 | ||
e38f8a7a LR |
119 | /* Used to queue up beacon hints for review */ |
120 | static LIST_HEAD(reg_pending_beacons); | |
121 | static spinlock_t reg_pending_beacons_lock; | |
122 | ||
123 | /* Used to keep track of processed beacon hints */ | |
124 | static LIST_HEAD(reg_beacon_list); | |
125 | ||
126 | struct reg_beacon { | |
127 | struct list_head list; | |
128 | struct ieee80211_channel chan; | |
129 | }; | |
130 | ||
f333a7a2 LR |
131 | static void reg_todo(struct work_struct *work); |
132 | static DECLARE_WORK(reg_work, reg_todo); | |
133 | ||
a90c7a31 LR |
134 | static void reg_timeout_work(struct work_struct *work); |
135 | static DECLARE_DELAYED_WORK(reg_timeout, reg_timeout_work); | |
136 | ||
734366de JB |
137 | /* We keep a static world regulatory domain in case of the absence of CRDA */ |
138 | static const struct ieee80211_regdomain world_regdom = { | |
90cdc6df | 139 | .n_reg_rules = 6, |
734366de JB |
140 | .alpha2 = "00", |
141 | .reg_rules = { | |
68798a62 LR |
142 | /* IEEE 802.11b/g, channels 1..11 */ |
143 | REG_RULE(2412-10, 2462+10, 40, 6, 20, 0), | |
611b6a82 LR |
144 | /* IEEE 802.11b/g, channels 12..13. No HT40 |
145 | * channel fits here. */ | |
146 | REG_RULE(2467-10, 2472+10, 20, 6, 20, | |
3fc71f77 LR |
147 | NL80211_RRF_PASSIVE_SCAN | |
148 | NL80211_RRF_NO_IBSS), | |
611b6a82 LR |
149 | /* IEEE 802.11 channel 14 - Only JP enables |
150 | * this and for 802.11b only */ | |
151 | REG_RULE(2484-10, 2484+10, 20, 6, 20, | |
152 | NL80211_RRF_PASSIVE_SCAN | | |
153 | NL80211_RRF_NO_IBSS | | |
154 | NL80211_RRF_NO_OFDM), | |
155 | /* IEEE 802.11a, channel 36..48 */ | |
ec329ace | 156 | REG_RULE(5180-10, 5240+10, 40, 6, 20, |
611b6a82 LR |
157 | NL80211_RRF_PASSIVE_SCAN | |
158 | NL80211_RRF_NO_IBSS), | |
3fc71f77 LR |
159 | |
160 | /* NB: 5260 MHz - 5700 MHz requies DFS */ | |
161 | ||
162 | /* IEEE 802.11a, channel 149..165 */ | |
ec329ace | 163 | REG_RULE(5745-10, 5825+10, 40, 6, 20, |
3fc71f77 LR |
164 | NL80211_RRF_PASSIVE_SCAN | |
165 | NL80211_RRF_NO_IBSS), | |
90cdc6df VK |
166 | |
167 | /* IEEE 802.11ad (60gHz), channels 1..3 */ | |
168 | REG_RULE(56160+2160*1-1080, 56160+2160*3+1080, 2160, 0, 0, 0), | |
734366de JB |
169 | } |
170 | }; | |
171 | ||
a3d2eaf0 JB |
172 | static const struct ieee80211_regdomain *cfg80211_world_regdom = |
173 | &world_regdom; | |
734366de | 174 | |
6ee7d330 | 175 | static char *ieee80211_regdom = "00"; |
09d989d1 | 176 | static char user_alpha2[2]; |
6ee7d330 | 177 | |
734366de JB |
178 | module_param(ieee80211_regdom, charp, 0444); |
179 | MODULE_PARM_DESC(ieee80211_regdom, "IEEE 802.11 regulatory domain code"); | |
180 | ||
a042994d | 181 | static void reset_regdomains(bool full_reset) |
734366de | 182 | { |
942b25cf JB |
183 | /* avoid freeing static information or freeing something twice */ |
184 | if (cfg80211_regdomain == cfg80211_world_regdom) | |
185 | cfg80211_regdomain = NULL; | |
186 | if (cfg80211_world_regdom == &world_regdom) | |
187 | cfg80211_world_regdom = NULL; | |
188 | if (cfg80211_regdomain == &world_regdom) | |
189 | cfg80211_regdomain = NULL; | |
942b25cf JB |
190 | |
191 | kfree(cfg80211_regdomain); | |
192 | kfree(cfg80211_world_regdom); | |
734366de | 193 | |
a3d2eaf0 | 194 | cfg80211_world_regdom = &world_regdom; |
734366de | 195 | cfg80211_regdomain = NULL; |
a042994d LR |
196 | |
197 | if (!full_reset) | |
198 | return; | |
199 | ||
200 | if (last_request != &core_request_world) | |
201 | kfree(last_request); | |
202 | last_request = &core_request_world; | |
734366de JB |
203 | } |
204 | ||
fb1fc7ad LR |
205 | /* |
206 | * Dynamic world regulatory domain requested by the wireless | |
207 | * core upon initialization | |
208 | */ | |
a3d2eaf0 | 209 | static void update_world_regdomain(const struct ieee80211_regdomain *rd) |
734366de | 210 | { |
f6037d09 | 211 | BUG_ON(!last_request); |
734366de | 212 | |
a042994d | 213 | reset_regdomains(false); |
734366de JB |
214 | |
215 | cfg80211_world_regdom = rd; | |
216 | cfg80211_regdomain = rd; | |
217 | } | |
734366de | 218 | |
a3d2eaf0 | 219 | bool is_world_regdom(const char *alpha2) |
b2e1b302 LR |
220 | { |
221 | if (!alpha2) | |
222 | return false; | |
223 | if (alpha2[0] == '0' && alpha2[1] == '0') | |
224 | return true; | |
225 | return false; | |
226 | } | |
8318d78a | 227 | |
a3d2eaf0 | 228 | static bool is_alpha2_set(const char *alpha2) |
b2e1b302 LR |
229 | { |
230 | if (!alpha2) | |
231 | return false; | |
232 | if (alpha2[0] != 0 && alpha2[1] != 0) | |
233 | return true; | |
234 | return false; | |
235 | } | |
8318d78a | 236 | |
a3d2eaf0 | 237 | static bool is_unknown_alpha2(const char *alpha2) |
b2e1b302 LR |
238 | { |
239 | if (!alpha2) | |
240 | return false; | |
fb1fc7ad LR |
241 | /* |
242 | * Special case where regulatory domain was built by driver | |
243 | * but a specific alpha2 cannot be determined | |
244 | */ | |
b2e1b302 LR |
245 | if (alpha2[0] == '9' && alpha2[1] == '9') |
246 | return true; | |
247 | return false; | |
248 | } | |
8318d78a | 249 | |
3f2355cb LR |
250 | static bool is_intersected_alpha2(const char *alpha2) |
251 | { | |
252 | if (!alpha2) | |
253 | return false; | |
fb1fc7ad LR |
254 | /* |
255 | * Special case where regulatory domain is the | |
3f2355cb | 256 | * result of an intersection between two regulatory domain |
fb1fc7ad LR |
257 | * structures |
258 | */ | |
3f2355cb LR |
259 | if (alpha2[0] == '9' && alpha2[1] == '8') |
260 | return true; | |
261 | return false; | |
262 | } | |
263 | ||
a3d2eaf0 | 264 | static bool is_an_alpha2(const char *alpha2) |
b2e1b302 LR |
265 | { |
266 | if (!alpha2) | |
267 | return false; | |
c61029c7 | 268 | if (isalpha(alpha2[0]) && isalpha(alpha2[1])) |
b2e1b302 LR |
269 | return true; |
270 | return false; | |
271 | } | |
8318d78a | 272 | |
a3d2eaf0 | 273 | static bool alpha2_equal(const char *alpha2_x, const char *alpha2_y) |
b2e1b302 LR |
274 | { |
275 | if (!alpha2_x || !alpha2_y) | |
276 | return false; | |
277 | if (alpha2_x[0] == alpha2_y[0] && | |
278 | alpha2_x[1] == alpha2_y[1]) | |
279 | return true; | |
280 | return false; | |
281 | } | |
282 | ||
69b1572b | 283 | static bool regdom_changes(const char *alpha2) |
b2e1b302 | 284 | { |
761cf7ec LR |
285 | assert_cfg80211_lock(); |
286 | ||
b2e1b302 LR |
287 | if (!cfg80211_regdomain) |
288 | return true; | |
289 | if (alpha2_equal(cfg80211_regdomain->alpha2, alpha2)) | |
290 | return false; | |
291 | return true; | |
292 | } | |
293 | ||
09d989d1 LR |
294 | /* |
295 | * The NL80211_REGDOM_SET_BY_USER regdom alpha2 is cached, this lets | |
296 | * you know if a valid regulatory hint with NL80211_REGDOM_SET_BY_USER | |
297 | * has ever been issued. | |
298 | */ | |
299 | static bool is_user_regdom_saved(void) | |
300 | { | |
301 | if (user_alpha2[0] == '9' && user_alpha2[1] == '7') | |
302 | return false; | |
303 | ||
304 | /* This would indicate a mistake on the design */ | |
305 | if (WARN((!is_world_regdom(user_alpha2) && | |
306 | !is_an_alpha2(user_alpha2)), | |
307 | "Unexpected user alpha2: %c%c\n", | |
308 | user_alpha2[0], | |
309 | user_alpha2[1])) | |
310 | return false; | |
311 | ||
312 | return true; | |
313 | } | |
314 | ||
3b377ea9 JL |
315 | static int reg_copy_regd(const struct ieee80211_regdomain **dst_regd, |
316 | const struct ieee80211_regdomain *src_regd) | |
317 | { | |
318 | struct ieee80211_regdomain *regd; | |
319 | int size_of_regd = 0; | |
320 | unsigned int i; | |
321 | ||
322 | size_of_regd = sizeof(struct ieee80211_regdomain) + | |
323 | ((src_regd->n_reg_rules + 1) * sizeof(struct ieee80211_reg_rule)); | |
324 | ||
325 | regd = kzalloc(size_of_regd, GFP_KERNEL); | |
326 | if (!regd) | |
327 | return -ENOMEM; | |
328 | ||
329 | memcpy(regd, src_regd, sizeof(struct ieee80211_regdomain)); | |
330 | ||
331 | for (i = 0; i < src_regd->n_reg_rules; i++) | |
332 | memcpy(®d->reg_rules[i], &src_regd->reg_rules[i], | |
333 | sizeof(struct ieee80211_reg_rule)); | |
334 | ||
335 | *dst_regd = regd; | |
336 | return 0; | |
337 | } | |
338 | ||
339 | #ifdef CONFIG_CFG80211_INTERNAL_REGDB | |
340 | struct reg_regdb_search_request { | |
341 | char alpha2[2]; | |
342 | struct list_head list; | |
343 | }; | |
344 | ||
345 | static LIST_HEAD(reg_regdb_search_list); | |
368d06f5 | 346 | static DEFINE_MUTEX(reg_regdb_search_mutex); |
3b377ea9 JL |
347 | |
348 | static void reg_regdb_search(struct work_struct *work) | |
349 | { | |
350 | struct reg_regdb_search_request *request; | |
351 | const struct ieee80211_regdomain *curdom, *regdom; | |
352 | int i, r; | |
a85d0d7f LR |
353 | bool set_reg = false; |
354 | ||
355 | mutex_lock(&cfg80211_mutex); | |
3b377ea9 | 356 | |
368d06f5 | 357 | mutex_lock(®_regdb_search_mutex); |
3b377ea9 JL |
358 | while (!list_empty(®_regdb_search_list)) { |
359 | request = list_first_entry(®_regdb_search_list, | |
360 | struct reg_regdb_search_request, | |
361 | list); | |
362 | list_del(&request->list); | |
363 | ||
364 | for (i=0; i<reg_regdb_size; i++) { | |
365 | curdom = reg_regdb[i]; | |
366 | ||
367 | if (!memcmp(request->alpha2, curdom->alpha2, 2)) { | |
368 | r = reg_copy_regd(®dom, curdom); | |
369 | if (r) | |
370 | break; | |
a85d0d7f | 371 | set_reg = true; |
3b377ea9 JL |
372 | break; |
373 | } | |
374 | } | |
375 | ||
376 | kfree(request); | |
377 | } | |
368d06f5 | 378 | mutex_unlock(®_regdb_search_mutex); |
a85d0d7f LR |
379 | |
380 | if (set_reg) | |
381 | set_regdom(regdom); | |
382 | ||
383 | mutex_unlock(&cfg80211_mutex); | |
3b377ea9 JL |
384 | } |
385 | ||
386 | static DECLARE_WORK(reg_regdb_work, reg_regdb_search); | |
387 | ||
388 | static void reg_regdb_query(const char *alpha2) | |
389 | { | |
390 | struct reg_regdb_search_request *request; | |
391 | ||
392 | if (!alpha2) | |
393 | return; | |
394 | ||
395 | request = kzalloc(sizeof(struct reg_regdb_search_request), GFP_KERNEL); | |
396 | if (!request) | |
397 | return; | |
398 | ||
399 | memcpy(request->alpha2, alpha2, 2); | |
400 | ||
368d06f5 | 401 | mutex_lock(®_regdb_search_mutex); |
3b377ea9 | 402 | list_add_tail(&request->list, ®_regdb_search_list); |
368d06f5 | 403 | mutex_unlock(®_regdb_search_mutex); |
3b377ea9 JL |
404 | |
405 | schedule_work(®_regdb_work); | |
406 | } | |
80007efe LR |
407 | |
408 | /* Feel free to add any other sanity checks here */ | |
409 | static void reg_regdb_size_check(void) | |
410 | { | |
411 | /* We should ideally BUILD_BUG_ON() but then random builds would fail */ | |
412 | WARN_ONCE(!reg_regdb_size, "db.txt is empty, you should update it..."); | |
413 | } | |
3b377ea9 | 414 | #else |
80007efe | 415 | static inline void reg_regdb_size_check(void) {} |
3b377ea9 JL |
416 | static inline void reg_regdb_query(const char *alpha2) {} |
417 | #endif /* CONFIG_CFG80211_INTERNAL_REGDB */ | |
418 | ||
fb1fc7ad LR |
419 | /* |
420 | * This lets us keep regulatory code which is updated on a regulatory | |
4d9d88d1 SJR |
421 | * basis in userspace. Country information is filled in by |
422 | * reg_device_uevent | |
fb1fc7ad | 423 | */ |
b2e1b302 LR |
424 | static int call_crda(const char *alpha2) |
425 | { | |
b2e1b302 | 426 | if (!is_world_regdom((char *) alpha2)) |
e9c0268f | 427 | pr_info("Calling CRDA for country: %c%c\n", |
b2e1b302 LR |
428 | alpha2[0], alpha2[1]); |
429 | else | |
e9c0268f | 430 | pr_info("Calling CRDA to update world regulatory domain\n"); |
b2e1b302 | 431 | |
3b377ea9 JL |
432 | /* query internal regulatory database (if it exists) */ |
433 | reg_regdb_query(alpha2); | |
434 | ||
4d9d88d1 | 435 | return kobject_uevent(®_pdev->dev.kobj, KOBJ_CHANGE); |
b2e1b302 LR |
436 | } |
437 | ||
b2e1b302 | 438 | /* Used by nl80211 before kmalloc'ing our regulatory domain */ |
a3d2eaf0 | 439 | bool reg_is_valid_request(const char *alpha2) |
b2e1b302 | 440 | { |
61405e97 LR |
441 | assert_cfg80211_lock(); |
442 | ||
f6037d09 JB |
443 | if (!last_request) |
444 | return false; | |
445 | ||
446 | return alpha2_equal(last_request->alpha2, alpha2); | |
b2e1b302 | 447 | } |
8318d78a | 448 | |
b2e1b302 | 449 | /* Sanity check on a regulatory rule */ |
a3d2eaf0 | 450 | static bool is_valid_reg_rule(const struct ieee80211_reg_rule *rule) |
8318d78a | 451 | { |
a3d2eaf0 | 452 | const struct ieee80211_freq_range *freq_range = &rule->freq_range; |
b2e1b302 LR |
453 | u32 freq_diff; |
454 | ||
91e99004 | 455 | if (freq_range->start_freq_khz <= 0 || freq_range->end_freq_khz <= 0) |
b2e1b302 LR |
456 | return false; |
457 | ||
458 | if (freq_range->start_freq_khz > freq_range->end_freq_khz) | |
459 | return false; | |
460 | ||
461 | freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz; | |
462 | ||
bd05f28e RK |
463 | if (freq_range->end_freq_khz <= freq_range->start_freq_khz || |
464 | freq_range->max_bandwidth_khz > freq_diff) | |
b2e1b302 LR |
465 | return false; |
466 | ||
467 | return true; | |
468 | } | |
469 | ||
a3d2eaf0 | 470 | static bool is_valid_rd(const struct ieee80211_regdomain *rd) |
b2e1b302 | 471 | { |
a3d2eaf0 | 472 | const struct ieee80211_reg_rule *reg_rule = NULL; |
b2e1b302 | 473 | unsigned int i; |
8318d78a | 474 | |
b2e1b302 LR |
475 | if (!rd->n_reg_rules) |
476 | return false; | |
8318d78a | 477 | |
88dc1c3f LR |
478 | if (WARN_ON(rd->n_reg_rules > NL80211_MAX_SUPP_REG_RULES)) |
479 | return false; | |
480 | ||
b2e1b302 LR |
481 | for (i = 0; i < rd->n_reg_rules; i++) { |
482 | reg_rule = &rd->reg_rules[i]; | |
483 | if (!is_valid_reg_rule(reg_rule)) | |
484 | return false; | |
485 | } | |
486 | ||
487 | return true; | |
8318d78a JB |
488 | } |
489 | ||
038659e7 LR |
490 | static bool reg_does_bw_fit(const struct ieee80211_freq_range *freq_range, |
491 | u32 center_freq_khz, | |
492 | u32 bw_khz) | |
b2e1b302 | 493 | { |
038659e7 LR |
494 | u32 start_freq_khz, end_freq_khz; |
495 | ||
496 | start_freq_khz = center_freq_khz - (bw_khz/2); | |
497 | end_freq_khz = center_freq_khz + (bw_khz/2); | |
498 | ||
499 | if (start_freq_khz >= freq_range->start_freq_khz && | |
500 | end_freq_khz <= freq_range->end_freq_khz) | |
501 | return true; | |
502 | ||
503 | return false; | |
b2e1b302 | 504 | } |
8318d78a | 505 | |
0c7dc45d LR |
506 | /** |
507 | * freq_in_rule_band - tells us if a frequency is in a frequency band | |
508 | * @freq_range: frequency rule we want to query | |
509 | * @freq_khz: frequency we are inquiring about | |
510 | * | |
511 | * This lets us know if a specific frequency rule is or is not relevant to | |
512 | * a specific frequency's band. Bands are device specific and artificial | |
513 | * definitions (the "2.4 GHz band" and the "5 GHz band"), however it is | |
514 | * safe for now to assume that a frequency rule should not be part of a | |
515 | * frequency's band if the start freq or end freq are off by more than 2 GHz. | |
516 | * This resolution can be lowered and should be considered as we add | |
517 | * regulatory rule support for other "bands". | |
518 | **/ | |
519 | static bool freq_in_rule_band(const struct ieee80211_freq_range *freq_range, | |
520 | u32 freq_khz) | |
521 | { | |
522 | #define ONE_GHZ_IN_KHZ 1000000 | |
523 | if (abs(freq_khz - freq_range->start_freq_khz) <= (2 * ONE_GHZ_IN_KHZ)) | |
524 | return true; | |
525 | if (abs(freq_khz - freq_range->end_freq_khz) <= (2 * ONE_GHZ_IN_KHZ)) | |
526 | return true; | |
527 | return false; | |
528 | #undef ONE_GHZ_IN_KHZ | |
529 | } | |
530 | ||
fb1fc7ad LR |
531 | /* |
532 | * Helper for regdom_intersect(), this does the real | |
533 | * mathematical intersection fun | |
534 | */ | |
9c96477d LR |
535 | static int reg_rules_intersect( |
536 | const struct ieee80211_reg_rule *rule1, | |
537 | const struct ieee80211_reg_rule *rule2, | |
538 | struct ieee80211_reg_rule *intersected_rule) | |
539 | { | |
540 | const struct ieee80211_freq_range *freq_range1, *freq_range2; | |
541 | struct ieee80211_freq_range *freq_range; | |
542 | const struct ieee80211_power_rule *power_rule1, *power_rule2; | |
543 | struct ieee80211_power_rule *power_rule; | |
544 | u32 freq_diff; | |
545 | ||
546 | freq_range1 = &rule1->freq_range; | |
547 | freq_range2 = &rule2->freq_range; | |
548 | freq_range = &intersected_rule->freq_range; | |
549 | ||
550 | power_rule1 = &rule1->power_rule; | |
551 | power_rule2 = &rule2->power_rule; | |
552 | power_rule = &intersected_rule->power_rule; | |
553 | ||
554 | freq_range->start_freq_khz = max(freq_range1->start_freq_khz, | |
555 | freq_range2->start_freq_khz); | |
556 | freq_range->end_freq_khz = min(freq_range1->end_freq_khz, | |
557 | freq_range2->end_freq_khz); | |
558 | freq_range->max_bandwidth_khz = min(freq_range1->max_bandwidth_khz, | |
559 | freq_range2->max_bandwidth_khz); | |
560 | ||
561 | freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz; | |
562 | if (freq_range->max_bandwidth_khz > freq_diff) | |
563 | freq_range->max_bandwidth_khz = freq_diff; | |
564 | ||
565 | power_rule->max_eirp = min(power_rule1->max_eirp, | |
566 | power_rule2->max_eirp); | |
567 | power_rule->max_antenna_gain = min(power_rule1->max_antenna_gain, | |
568 | power_rule2->max_antenna_gain); | |
569 | ||
570 | intersected_rule->flags = (rule1->flags | rule2->flags); | |
571 | ||
572 | if (!is_valid_reg_rule(intersected_rule)) | |
573 | return -EINVAL; | |
574 | ||
575 | return 0; | |
576 | } | |
577 | ||
578 | /** | |
579 | * regdom_intersect - do the intersection between two regulatory domains | |
580 | * @rd1: first regulatory domain | |
581 | * @rd2: second regulatory domain | |
582 | * | |
583 | * Use this function to get the intersection between two regulatory domains. | |
584 | * Once completed we will mark the alpha2 for the rd as intersected, "98", | |
585 | * as no one single alpha2 can represent this regulatory domain. | |
586 | * | |
587 | * Returns a pointer to the regulatory domain structure which will hold the | |
588 | * resulting intersection of rules between rd1 and rd2. We will | |
589 | * kzalloc() this structure for you. | |
590 | */ | |
591 | static struct ieee80211_regdomain *regdom_intersect( | |
592 | const struct ieee80211_regdomain *rd1, | |
593 | const struct ieee80211_regdomain *rd2) | |
594 | { | |
595 | int r, size_of_regd; | |
596 | unsigned int x, y; | |
597 | unsigned int num_rules = 0, rule_idx = 0; | |
598 | const struct ieee80211_reg_rule *rule1, *rule2; | |
599 | struct ieee80211_reg_rule *intersected_rule; | |
600 | struct ieee80211_regdomain *rd; | |
601 | /* This is just a dummy holder to help us count */ | |
602 | struct ieee80211_reg_rule irule; | |
603 | ||
604 | /* Uses the stack temporarily for counter arithmetic */ | |
605 | intersected_rule = &irule; | |
606 | ||
607 | memset(intersected_rule, 0, sizeof(struct ieee80211_reg_rule)); | |
608 | ||
609 | if (!rd1 || !rd2) | |
610 | return NULL; | |
611 | ||
fb1fc7ad LR |
612 | /* |
613 | * First we get a count of the rules we'll need, then we actually | |
9c96477d LR |
614 | * build them. This is to so we can malloc() and free() a |
615 | * regdomain once. The reason we use reg_rules_intersect() here | |
616 | * is it will return -EINVAL if the rule computed makes no sense. | |
fb1fc7ad LR |
617 | * All rules that do check out OK are valid. |
618 | */ | |
9c96477d LR |
619 | |
620 | for (x = 0; x < rd1->n_reg_rules; x++) { | |
621 | rule1 = &rd1->reg_rules[x]; | |
622 | for (y = 0; y < rd2->n_reg_rules; y++) { | |
623 | rule2 = &rd2->reg_rules[y]; | |
624 | if (!reg_rules_intersect(rule1, rule2, | |
625 | intersected_rule)) | |
626 | num_rules++; | |
627 | memset(intersected_rule, 0, | |
628 | sizeof(struct ieee80211_reg_rule)); | |
629 | } | |
630 | } | |
631 | ||
632 | if (!num_rules) | |
633 | return NULL; | |
634 | ||
635 | size_of_regd = sizeof(struct ieee80211_regdomain) + | |
636 | ((num_rules + 1) * sizeof(struct ieee80211_reg_rule)); | |
637 | ||
638 | rd = kzalloc(size_of_regd, GFP_KERNEL); | |
639 | if (!rd) | |
640 | return NULL; | |
641 | ||
642 | for (x = 0; x < rd1->n_reg_rules; x++) { | |
643 | rule1 = &rd1->reg_rules[x]; | |
644 | for (y = 0; y < rd2->n_reg_rules; y++) { | |
645 | rule2 = &rd2->reg_rules[y]; | |
fb1fc7ad LR |
646 | /* |
647 | * This time around instead of using the stack lets | |
9c96477d | 648 | * write to the target rule directly saving ourselves |
fb1fc7ad LR |
649 | * a memcpy() |
650 | */ | |
9c96477d LR |
651 | intersected_rule = &rd->reg_rules[rule_idx]; |
652 | r = reg_rules_intersect(rule1, rule2, | |
653 | intersected_rule); | |
fb1fc7ad LR |
654 | /* |
655 | * No need to memset here the intersected rule here as | |
656 | * we're not using the stack anymore | |
657 | */ | |
9c96477d LR |
658 | if (r) |
659 | continue; | |
660 | rule_idx++; | |
661 | } | |
662 | } | |
663 | ||
664 | if (rule_idx != num_rules) { | |
665 | kfree(rd); | |
666 | return NULL; | |
667 | } | |
668 | ||
669 | rd->n_reg_rules = num_rules; | |
670 | rd->alpha2[0] = '9'; | |
671 | rd->alpha2[1] = '8'; | |
672 | ||
673 | return rd; | |
674 | } | |
675 | ||
fb1fc7ad LR |
676 | /* |
677 | * XXX: add support for the rest of enum nl80211_reg_rule_flags, we may | |
678 | * want to just have the channel structure use these | |
679 | */ | |
b2e1b302 LR |
680 | static u32 map_regdom_flags(u32 rd_flags) |
681 | { | |
682 | u32 channel_flags = 0; | |
683 | if (rd_flags & NL80211_RRF_PASSIVE_SCAN) | |
684 | channel_flags |= IEEE80211_CHAN_PASSIVE_SCAN; | |
685 | if (rd_flags & NL80211_RRF_NO_IBSS) | |
686 | channel_flags |= IEEE80211_CHAN_NO_IBSS; | |
687 | if (rd_flags & NL80211_RRF_DFS) | |
688 | channel_flags |= IEEE80211_CHAN_RADAR; | |
03f6b084 SF |
689 | if (rd_flags & NL80211_RRF_NO_OFDM) |
690 | channel_flags |= IEEE80211_CHAN_NO_OFDM; | |
b2e1b302 LR |
691 | return channel_flags; |
692 | } | |
693 | ||
1fa25e41 LR |
694 | static int freq_reg_info_regd(struct wiphy *wiphy, |
695 | u32 center_freq, | |
038659e7 | 696 | u32 desired_bw_khz, |
1fa25e41 LR |
697 | const struct ieee80211_reg_rule **reg_rule, |
698 | const struct ieee80211_regdomain *custom_regd) | |
8318d78a JB |
699 | { |
700 | int i; | |
0c7dc45d | 701 | bool band_rule_found = false; |
3e0c3ff3 | 702 | const struct ieee80211_regdomain *regd; |
038659e7 LR |
703 | bool bw_fits = false; |
704 | ||
705 | if (!desired_bw_khz) | |
706 | desired_bw_khz = MHZ_TO_KHZ(20); | |
8318d78a | 707 | |
1fa25e41 | 708 | regd = custom_regd ? custom_regd : cfg80211_regdomain; |
3e0c3ff3 | 709 | |
fb1fc7ad LR |
710 | /* |
711 | * Follow the driver's regulatory domain, if present, unless a country | |
712 | * IE has been processed or a user wants to help complaince further | |
713 | */ | |
2784fe91 LR |
714 | if (!custom_regd && |
715 | last_request->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && | |
7db90f4a | 716 | last_request->initiator != NL80211_REGDOM_SET_BY_USER && |
3e0c3ff3 LR |
717 | wiphy->regd) |
718 | regd = wiphy->regd; | |
719 | ||
720 | if (!regd) | |
b2e1b302 LR |
721 | return -EINVAL; |
722 | ||
3e0c3ff3 | 723 | for (i = 0; i < regd->n_reg_rules; i++) { |
b2e1b302 LR |
724 | const struct ieee80211_reg_rule *rr; |
725 | const struct ieee80211_freq_range *fr = NULL; | |
b2e1b302 | 726 | |
3e0c3ff3 | 727 | rr = ®d->reg_rules[i]; |
b2e1b302 | 728 | fr = &rr->freq_range; |
0c7dc45d | 729 | |
fb1fc7ad LR |
730 | /* |
731 | * We only need to know if one frequency rule was | |
0c7dc45d | 732 | * was in center_freq's band, that's enough, so lets |
fb1fc7ad LR |
733 | * not overwrite it once found |
734 | */ | |
0c7dc45d LR |
735 | if (!band_rule_found) |
736 | band_rule_found = freq_in_rule_band(fr, center_freq); | |
737 | ||
038659e7 LR |
738 | bw_fits = reg_does_bw_fit(fr, |
739 | center_freq, | |
740 | desired_bw_khz); | |
0c7dc45d | 741 | |
038659e7 | 742 | if (band_rule_found && bw_fits) { |
b2e1b302 | 743 | *reg_rule = rr; |
038659e7 | 744 | return 0; |
8318d78a JB |
745 | } |
746 | } | |
747 | ||
0c7dc45d LR |
748 | if (!band_rule_found) |
749 | return -ERANGE; | |
750 | ||
038659e7 | 751 | return -EINVAL; |
b2e1b302 LR |
752 | } |
753 | ||
038659e7 LR |
754 | int freq_reg_info(struct wiphy *wiphy, |
755 | u32 center_freq, | |
756 | u32 desired_bw_khz, | |
757 | const struct ieee80211_reg_rule **reg_rule) | |
1fa25e41 | 758 | { |
ac46d48e | 759 | assert_cfg80211_lock(); |
038659e7 LR |
760 | return freq_reg_info_regd(wiphy, |
761 | center_freq, | |
762 | desired_bw_khz, | |
763 | reg_rule, | |
764 | NULL); | |
1fa25e41 | 765 | } |
4f366c5d | 766 | EXPORT_SYMBOL(freq_reg_info); |
b2e1b302 | 767 | |
926a0a09 LR |
768 | #ifdef CONFIG_CFG80211_REG_DEBUG |
769 | static const char *reg_initiator_name(enum nl80211_reg_initiator initiator) | |
770 | { | |
771 | switch (initiator) { | |
772 | case NL80211_REGDOM_SET_BY_CORE: | |
773 | return "Set by core"; | |
774 | case NL80211_REGDOM_SET_BY_USER: | |
775 | return "Set by user"; | |
776 | case NL80211_REGDOM_SET_BY_DRIVER: | |
777 | return "Set by driver"; | |
778 | case NL80211_REGDOM_SET_BY_COUNTRY_IE: | |
779 | return "Set by country IE"; | |
780 | default: | |
781 | WARN_ON(1); | |
782 | return "Set by bug"; | |
783 | } | |
784 | } | |
e702d3cf LR |
785 | |
786 | static void chan_reg_rule_print_dbg(struct ieee80211_channel *chan, | |
787 | u32 desired_bw_khz, | |
788 | const struct ieee80211_reg_rule *reg_rule) | |
789 | { | |
790 | const struct ieee80211_power_rule *power_rule; | |
791 | const struct ieee80211_freq_range *freq_range; | |
792 | char max_antenna_gain[32]; | |
793 | ||
794 | power_rule = ®_rule->power_rule; | |
795 | freq_range = ®_rule->freq_range; | |
796 | ||
797 | if (!power_rule->max_antenna_gain) | |
798 | snprintf(max_antenna_gain, 32, "N/A"); | |
799 | else | |
800 | snprintf(max_antenna_gain, 32, "%d", power_rule->max_antenna_gain); | |
801 | ||
d91e41b6 | 802 | REG_DBG_PRINT("Updating information on frequency %d MHz " |
ff039c6f | 803 | "for a %d MHz width channel with regulatory rule:\n", |
e702d3cf LR |
804 | chan->center_freq, |
805 | KHZ_TO_MHZ(desired_bw_khz)); | |
806 | ||
56e6786e | 807 | REG_DBG_PRINT("%d KHz - %d KHz @ %d KHz), (%s mBi, %d mBm)\n", |
e702d3cf LR |
808 | freq_range->start_freq_khz, |
809 | freq_range->end_freq_khz, | |
56e6786e | 810 | freq_range->max_bandwidth_khz, |
e702d3cf LR |
811 | max_antenna_gain, |
812 | power_rule->max_eirp); | |
813 | } | |
814 | #else | |
815 | static void chan_reg_rule_print_dbg(struct ieee80211_channel *chan, | |
816 | u32 desired_bw_khz, | |
817 | const struct ieee80211_reg_rule *reg_rule) | |
818 | { | |
819 | return; | |
820 | } | |
926a0a09 LR |
821 | #endif |
822 | ||
038659e7 LR |
823 | /* |
824 | * Note that right now we assume the desired channel bandwidth | |
825 | * is always 20 MHz for each individual channel (HT40 uses 20 MHz | |
826 | * per channel, the primary and the extension channel). To support | |
827 | * smaller custom bandwidths such as 5 MHz or 10 MHz we'll need a | |
828 | * new ieee80211_channel.target_bw and re run the regulatory check | |
829 | * on the wiphy with the target_bw specified. Then we can simply use | |
830 | * that below for the desired_bw_khz below. | |
831 | */ | |
7ca43d03 LR |
832 | static void handle_channel(struct wiphy *wiphy, |
833 | enum nl80211_reg_initiator initiator, | |
834 | enum ieee80211_band band, | |
a92a3ce7 | 835 | unsigned int chan_idx) |
b2e1b302 LR |
836 | { |
837 | int r; | |
038659e7 LR |
838 | u32 flags, bw_flags = 0; |
839 | u32 desired_bw_khz = MHZ_TO_KHZ(20); | |
b2e1b302 LR |
840 | const struct ieee80211_reg_rule *reg_rule = NULL; |
841 | const struct ieee80211_power_rule *power_rule = NULL; | |
038659e7 | 842 | const struct ieee80211_freq_range *freq_range = NULL; |
a92a3ce7 LR |
843 | struct ieee80211_supported_band *sband; |
844 | struct ieee80211_channel *chan; | |
fe33eb39 | 845 | struct wiphy *request_wiphy = NULL; |
a92a3ce7 | 846 | |
761cf7ec LR |
847 | assert_cfg80211_lock(); |
848 | ||
806a9e39 LR |
849 | request_wiphy = wiphy_idx_to_wiphy(last_request->wiphy_idx); |
850 | ||
a92a3ce7 LR |
851 | sband = wiphy->bands[band]; |
852 | BUG_ON(chan_idx >= sband->n_channels); | |
853 | chan = &sband->channels[chan_idx]; | |
854 | ||
855 | flags = chan->orig_flags; | |
b2e1b302 | 856 | |
038659e7 LR |
857 | r = freq_reg_info(wiphy, |
858 | MHZ_TO_KHZ(chan->center_freq), | |
859 | desired_bw_khz, | |
860 | ®_rule); | |
b2e1b302 | 861 | |
ca4ffe8f LR |
862 | if (r) { |
863 | /* | |
864 | * We will disable all channels that do not match our | |
25985edc | 865 | * received regulatory rule unless the hint is coming |
ca4ffe8f LR |
866 | * from a Country IE and the Country IE had no information |
867 | * about a band. The IEEE 802.11 spec allows for an AP | |
868 | * to send only a subset of the regulatory rules allowed, | |
869 | * so an AP in the US that only supports 2.4 GHz may only send | |
870 | * a country IE with information for the 2.4 GHz band | |
871 | * while 5 GHz is still supported. | |
872 | */ | |
873 | if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE && | |
874 | r == -ERANGE) | |
875 | return; | |
876 | ||
d91e41b6 | 877 | REG_DBG_PRINT("Disabling freq %d MHz\n", chan->center_freq); |
ca4ffe8f | 878 | chan->flags = IEEE80211_CHAN_DISABLED; |
8318d78a | 879 | return; |
ca4ffe8f | 880 | } |
8318d78a | 881 | |
e702d3cf LR |
882 | chan_reg_rule_print_dbg(chan, desired_bw_khz, reg_rule); |
883 | ||
b2e1b302 | 884 | power_rule = ®_rule->power_rule; |
038659e7 LR |
885 | freq_range = ®_rule->freq_range; |
886 | ||
887 | if (freq_range->max_bandwidth_khz < MHZ_TO_KHZ(40)) | |
888 | bw_flags = IEEE80211_CHAN_NO_HT40; | |
b2e1b302 | 889 | |
7db90f4a | 890 | if (last_request->initiator == NL80211_REGDOM_SET_BY_DRIVER && |
806a9e39 | 891 | request_wiphy && request_wiphy == wiphy && |
5be83de5 | 892 | request_wiphy->flags & WIPHY_FLAG_STRICT_REGULATORY) { |
fb1fc7ad | 893 | /* |
25985edc | 894 | * This guarantees the driver's requested regulatory domain |
f976376d | 895 | * will always be used as a base for further regulatory |
fb1fc7ad LR |
896 | * settings |
897 | */ | |
f976376d | 898 | chan->flags = chan->orig_flags = |
038659e7 | 899 | map_regdom_flags(reg_rule->flags) | bw_flags; |
f976376d LR |
900 | chan->max_antenna_gain = chan->orig_mag = |
901 | (int) MBI_TO_DBI(power_rule->max_antenna_gain); | |
f976376d LR |
902 | chan->max_power = chan->orig_mpwr = |
903 | (int) MBM_TO_DBM(power_rule->max_eirp); | |
904 | return; | |
905 | } | |
906 | ||
aa3d7eef | 907 | chan->beacon_found = false; |
038659e7 | 908 | chan->flags = flags | bw_flags | map_regdom_flags(reg_rule->flags); |
8318d78a | 909 | chan->max_antenna_gain = min(chan->orig_mag, |
b2e1b302 | 910 | (int) MBI_TO_DBI(power_rule->max_antenna_gain)); |
eccc068e | 911 | chan->max_reg_power = (int) MBM_TO_DBM(power_rule->max_eirp); |
5e31fc08 SG |
912 | if (chan->orig_mpwr) { |
913 | /* | |
914 | * Devices that have their own custom regulatory domain | |
915 | * but also use WIPHY_FLAG_STRICT_REGULATORY will follow the | |
916 | * passed country IE power settings. | |
917 | */ | |
918 | if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE && | |
919 | wiphy->flags & WIPHY_FLAG_CUSTOM_REGULATORY && | |
920 | wiphy->flags & WIPHY_FLAG_STRICT_REGULATORY) | |
921 | chan->max_power = chan->max_reg_power; | |
922 | else | |
923 | chan->max_power = min(chan->orig_mpwr, | |
924 | chan->max_reg_power); | |
925 | } else | |
926 | chan->max_power = chan->max_reg_power; | |
8318d78a JB |
927 | } |
928 | ||
7ca43d03 LR |
929 | static void handle_band(struct wiphy *wiphy, |
930 | enum ieee80211_band band, | |
931 | enum nl80211_reg_initiator initiator) | |
8318d78a | 932 | { |
a92a3ce7 LR |
933 | unsigned int i; |
934 | struct ieee80211_supported_band *sband; | |
935 | ||
936 | BUG_ON(!wiphy->bands[band]); | |
937 | sband = wiphy->bands[band]; | |
8318d78a JB |
938 | |
939 | for (i = 0; i < sband->n_channels; i++) | |
7ca43d03 | 940 | handle_channel(wiphy, initiator, band, i); |
8318d78a JB |
941 | } |
942 | ||
57b5ce07 LR |
943 | static bool reg_request_cell_base(struct regulatory_request *request) |
944 | { | |
945 | if (request->initiator != NL80211_REGDOM_SET_BY_USER) | |
946 | return false; | |
947 | if (request->user_reg_hint_type != NL80211_USER_REG_HINT_CELL_BASE) | |
948 | return false; | |
949 | return true; | |
950 | } | |
951 | ||
952 | bool reg_last_request_cell_base(void) | |
953 | { | |
ebd0fd2b | 954 | bool val; |
57b5ce07 LR |
955 | assert_cfg80211_lock(); |
956 | ||
957 | mutex_lock(®_mutex); | |
ebd0fd2b | 958 | val = reg_request_cell_base(last_request); |
57b5ce07 | 959 | mutex_unlock(®_mutex); |
ebd0fd2b | 960 | return val; |
57b5ce07 LR |
961 | } |
962 | ||
963 | #ifdef CONFIG_CFG80211_CERTIFICATION_ONUS | |
964 | ||
965 | /* Core specific check */ | |
966 | static int reg_ignore_cell_hint(struct regulatory_request *pending_request) | |
967 | { | |
968 | if (!reg_num_devs_support_basehint) | |
969 | return -EOPNOTSUPP; | |
970 | ||
971 | if (reg_request_cell_base(last_request)) { | |
972 | if (!regdom_changes(pending_request->alpha2)) | |
973 | return -EALREADY; | |
974 | return 0; | |
975 | } | |
976 | return 0; | |
977 | } | |
978 | ||
979 | /* Device specific check */ | |
980 | static bool reg_dev_ignore_cell_hint(struct wiphy *wiphy) | |
981 | { | |
982 | if (!(wiphy->features & NL80211_FEATURE_CELL_BASE_REG_HINTS)) | |
983 | return true; | |
984 | return false; | |
985 | } | |
986 | #else | |
987 | static int reg_ignore_cell_hint(struct regulatory_request *pending_request) | |
988 | { | |
989 | return -EOPNOTSUPP; | |
990 | } | |
991 | static int reg_dev_ignore_cell_hint(struct wiphy *wiphy) | |
992 | { | |
993 | return true; | |
994 | } | |
995 | #endif | |
996 | ||
997 | ||
7db90f4a LR |
998 | static bool ignore_reg_update(struct wiphy *wiphy, |
999 | enum nl80211_reg_initiator initiator) | |
14b9815a | 1000 | { |
926a0a09 | 1001 | if (!last_request) { |
d91e41b6 | 1002 | REG_DBG_PRINT("Ignoring regulatory request %s since " |
926a0a09 LR |
1003 | "last_request is not set\n", |
1004 | reg_initiator_name(initiator)); | |
14b9815a | 1005 | return true; |
926a0a09 LR |
1006 | } |
1007 | ||
7db90f4a | 1008 | if (initiator == NL80211_REGDOM_SET_BY_CORE && |
926a0a09 | 1009 | wiphy->flags & WIPHY_FLAG_CUSTOM_REGULATORY) { |
d91e41b6 | 1010 | REG_DBG_PRINT("Ignoring regulatory request %s " |
926a0a09 | 1011 | "since the driver uses its own custom " |
12c5ffb5 | 1012 | "regulatory domain\n", |
926a0a09 | 1013 | reg_initiator_name(initiator)); |
14b9815a | 1014 | return true; |
926a0a09 LR |
1015 | } |
1016 | ||
fb1fc7ad LR |
1017 | /* |
1018 | * wiphy->regd will be set once the device has its own | |
1019 | * desired regulatory domain set | |
1020 | */ | |
5be83de5 | 1021 | if (wiphy->flags & WIPHY_FLAG_STRICT_REGULATORY && !wiphy->regd && |
749b527b | 1022 | initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && |
926a0a09 | 1023 | !is_world_regdom(last_request->alpha2)) { |
d91e41b6 | 1024 | REG_DBG_PRINT("Ignoring regulatory request %s " |
5bc91db8 | 1025 | "since the driver requires its own regulatory " |
12c5ffb5 | 1026 | "domain to be set first\n", |
926a0a09 | 1027 | reg_initiator_name(initiator)); |
14b9815a | 1028 | return true; |
926a0a09 LR |
1029 | } |
1030 | ||
57b5ce07 LR |
1031 | if (reg_request_cell_base(last_request)) |
1032 | return reg_dev_ignore_cell_hint(wiphy); | |
1033 | ||
14b9815a LR |
1034 | return false; |
1035 | } | |
1036 | ||
e38f8a7a LR |
1037 | static void handle_reg_beacon(struct wiphy *wiphy, |
1038 | unsigned int chan_idx, | |
1039 | struct reg_beacon *reg_beacon) | |
1040 | { | |
e38f8a7a LR |
1041 | struct ieee80211_supported_band *sband; |
1042 | struct ieee80211_channel *chan; | |
6bad8766 LR |
1043 | bool channel_changed = false; |
1044 | struct ieee80211_channel chan_before; | |
e38f8a7a LR |
1045 | |
1046 | assert_cfg80211_lock(); | |
1047 | ||
1048 | sband = wiphy->bands[reg_beacon->chan.band]; | |
1049 | chan = &sband->channels[chan_idx]; | |
1050 | ||
1051 | if (likely(chan->center_freq != reg_beacon->chan.center_freq)) | |
1052 | return; | |
1053 | ||
6bad8766 LR |
1054 | if (chan->beacon_found) |
1055 | return; | |
1056 | ||
1057 | chan->beacon_found = true; | |
1058 | ||
5be83de5 | 1059 | if (wiphy->flags & WIPHY_FLAG_DISABLE_BEACON_HINTS) |
37184244 LR |
1060 | return; |
1061 | ||
6bad8766 LR |
1062 | chan_before.center_freq = chan->center_freq; |
1063 | chan_before.flags = chan->flags; | |
1064 | ||
37184244 | 1065 | if (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN) { |
e38f8a7a | 1066 | chan->flags &= ~IEEE80211_CHAN_PASSIVE_SCAN; |
6bad8766 | 1067 | channel_changed = true; |
e38f8a7a LR |
1068 | } |
1069 | ||
37184244 | 1070 | if (chan->flags & IEEE80211_CHAN_NO_IBSS) { |
e38f8a7a | 1071 | chan->flags &= ~IEEE80211_CHAN_NO_IBSS; |
6bad8766 | 1072 | channel_changed = true; |
e38f8a7a LR |
1073 | } |
1074 | ||
6bad8766 LR |
1075 | if (channel_changed) |
1076 | nl80211_send_beacon_hint_event(wiphy, &chan_before, chan); | |
e38f8a7a LR |
1077 | } |
1078 | ||
1079 | /* | |
1080 | * Called when a scan on a wiphy finds a beacon on | |
1081 | * new channel | |
1082 | */ | |
1083 | static void wiphy_update_new_beacon(struct wiphy *wiphy, | |
1084 | struct reg_beacon *reg_beacon) | |
1085 | { | |
1086 | unsigned int i; | |
1087 | struct ieee80211_supported_band *sband; | |
1088 | ||
1089 | assert_cfg80211_lock(); | |
1090 | ||
1091 | if (!wiphy->bands[reg_beacon->chan.band]) | |
1092 | return; | |
1093 | ||
1094 | sband = wiphy->bands[reg_beacon->chan.band]; | |
1095 | ||
1096 | for (i = 0; i < sband->n_channels; i++) | |
1097 | handle_reg_beacon(wiphy, i, reg_beacon); | |
1098 | } | |
1099 | ||
1100 | /* | |
1101 | * Called upon reg changes or a new wiphy is added | |
1102 | */ | |
1103 | static void wiphy_update_beacon_reg(struct wiphy *wiphy) | |
1104 | { | |
1105 | unsigned int i; | |
1106 | struct ieee80211_supported_band *sband; | |
1107 | struct reg_beacon *reg_beacon; | |
1108 | ||
1109 | assert_cfg80211_lock(); | |
1110 | ||
1111 | if (list_empty(®_beacon_list)) | |
1112 | return; | |
1113 | ||
1114 | list_for_each_entry(reg_beacon, ®_beacon_list, list) { | |
1115 | if (!wiphy->bands[reg_beacon->chan.band]) | |
1116 | continue; | |
1117 | sband = wiphy->bands[reg_beacon->chan.band]; | |
1118 | for (i = 0; i < sband->n_channels; i++) | |
1119 | handle_reg_beacon(wiphy, i, reg_beacon); | |
1120 | } | |
1121 | } | |
1122 | ||
1123 | static bool reg_is_world_roaming(struct wiphy *wiphy) | |
1124 | { | |
1125 | if (is_world_regdom(cfg80211_regdomain->alpha2) || | |
1126 | (wiphy->regd && is_world_regdom(wiphy->regd->alpha2))) | |
1127 | return true; | |
b1ed8ddd LR |
1128 | if (last_request && |
1129 | last_request->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && | |
5be83de5 | 1130 | wiphy->flags & WIPHY_FLAG_CUSTOM_REGULATORY) |
e38f8a7a LR |
1131 | return true; |
1132 | return false; | |
1133 | } | |
1134 | ||
1135 | /* Reap the advantages of previously found beacons */ | |
1136 | static void reg_process_beacons(struct wiphy *wiphy) | |
1137 | { | |
b1ed8ddd LR |
1138 | /* |
1139 | * Means we are just firing up cfg80211, so no beacons would | |
1140 | * have been processed yet. | |
1141 | */ | |
1142 | if (!last_request) | |
1143 | return; | |
e38f8a7a LR |
1144 | if (!reg_is_world_roaming(wiphy)) |
1145 | return; | |
1146 | wiphy_update_beacon_reg(wiphy); | |
1147 | } | |
1148 | ||
038659e7 LR |
1149 | static bool is_ht40_not_allowed(struct ieee80211_channel *chan) |
1150 | { | |
1151 | if (!chan) | |
1152 | return true; | |
1153 | if (chan->flags & IEEE80211_CHAN_DISABLED) | |
1154 | return true; | |
1155 | /* This would happen when regulatory rules disallow HT40 completely */ | |
1156 | if (IEEE80211_CHAN_NO_HT40 == (chan->flags & (IEEE80211_CHAN_NO_HT40))) | |
1157 | return true; | |
1158 | return false; | |
1159 | } | |
1160 | ||
1161 | static void reg_process_ht_flags_channel(struct wiphy *wiphy, | |
1162 | enum ieee80211_band band, | |
1163 | unsigned int chan_idx) | |
1164 | { | |
1165 | struct ieee80211_supported_band *sband; | |
1166 | struct ieee80211_channel *channel; | |
1167 | struct ieee80211_channel *channel_before = NULL, *channel_after = NULL; | |
1168 | unsigned int i; | |
1169 | ||
1170 | assert_cfg80211_lock(); | |
1171 | ||
1172 | sband = wiphy->bands[band]; | |
1173 | BUG_ON(chan_idx >= sband->n_channels); | |
1174 | channel = &sband->channels[chan_idx]; | |
1175 | ||
1176 | if (is_ht40_not_allowed(channel)) { | |
1177 | channel->flags |= IEEE80211_CHAN_NO_HT40; | |
1178 | return; | |
1179 | } | |
1180 | ||
1181 | /* | |
1182 | * We need to ensure the extension channels exist to | |
1183 | * be able to use HT40- or HT40+, this finds them (or not) | |
1184 | */ | |
1185 | for (i = 0; i < sband->n_channels; i++) { | |
1186 | struct ieee80211_channel *c = &sband->channels[i]; | |
1187 | if (c->center_freq == (channel->center_freq - 20)) | |
1188 | channel_before = c; | |
1189 | if (c->center_freq == (channel->center_freq + 20)) | |
1190 | channel_after = c; | |
1191 | } | |
1192 | ||
1193 | /* | |
1194 | * Please note that this assumes target bandwidth is 20 MHz, | |
1195 | * if that ever changes we also need to change the below logic | |
1196 | * to include that as well. | |
1197 | */ | |
1198 | if (is_ht40_not_allowed(channel_before)) | |
689da1b3 | 1199 | channel->flags |= IEEE80211_CHAN_NO_HT40MINUS; |
038659e7 | 1200 | else |
689da1b3 | 1201 | channel->flags &= ~IEEE80211_CHAN_NO_HT40MINUS; |
038659e7 LR |
1202 | |
1203 | if (is_ht40_not_allowed(channel_after)) | |
689da1b3 | 1204 | channel->flags |= IEEE80211_CHAN_NO_HT40PLUS; |
038659e7 | 1205 | else |
689da1b3 | 1206 | channel->flags &= ~IEEE80211_CHAN_NO_HT40PLUS; |
038659e7 LR |
1207 | } |
1208 | ||
1209 | static void reg_process_ht_flags_band(struct wiphy *wiphy, | |
1210 | enum ieee80211_band band) | |
1211 | { | |
1212 | unsigned int i; | |
1213 | struct ieee80211_supported_band *sband; | |
1214 | ||
1215 | BUG_ON(!wiphy->bands[band]); | |
1216 | sband = wiphy->bands[band]; | |
1217 | ||
1218 | for (i = 0; i < sband->n_channels; i++) | |
1219 | reg_process_ht_flags_channel(wiphy, band, i); | |
1220 | } | |
1221 | ||
1222 | static void reg_process_ht_flags(struct wiphy *wiphy) | |
1223 | { | |
1224 | enum ieee80211_band band; | |
1225 | ||
1226 | if (!wiphy) | |
1227 | return; | |
1228 | ||
1229 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) { | |
1230 | if (wiphy->bands[band]) | |
1231 | reg_process_ht_flags_band(wiphy, band); | |
1232 | } | |
1233 | ||
1234 | } | |
1235 | ||
eac03e38 SN |
1236 | static void wiphy_update_regulatory(struct wiphy *wiphy, |
1237 | enum nl80211_reg_initiator initiator) | |
b2e1b302 LR |
1238 | { |
1239 | enum ieee80211_band band; | |
d46e5b1d | 1240 | |
eac03e38 SN |
1241 | assert_reg_lock(); |
1242 | ||
7db90f4a | 1243 | if (ignore_reg_update(wiphy, initiator)) |
a203c2aa SN |
1244 | return; |
1245 | ||
b68e6b3b LR |
1246 | last_request->dfs_region = cfg80211_regdomain->dfs_region; |
1247 | ||
b2e1b302 | 1248 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) { |
8318d78a | 1249 | if (wiphy->bands[band]) |
7ca43d03 | 1250 | handle_band(wiphy, band, initiator); |
b2e1b302 | 1251 | } |
a203c2aa | 1252 | |
e38f8a7a | 1253 | reg_process_beacons(wiphy); |
038659e7 | 1254 | reg_process_ht_flags(wiphy); |
560e28e1 | 1255 | if (wiphy->reg_notifier) |
716f9392 | 1256 | wiphy->reg_notifier(wiphy, last_request); |
b2e1b302 LR |
1257 | } |
1258 | ||
d7549cbb SN |
1259 | static void update_all_wiphy_regulatory(enum nl80211_reg_initiator initiator) |
1260 | { | |
1261 | struct cfg80211_registered_device *rdev; | |
4a38994f | 1262 | struct wiphy *wiphy; |
d7549cbb | 1263 | |
4a38994f RM |
1264 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) { |
1265 | wiphy = &rdev->wiphy; | |
1266 | wiphy_update_regulatory(wiphy, initiator); | |
1267 | /* | |
1268 | * Regulatory updates set by CORE are ignored for custom | |
1269 | * regulatory cards. Let us notify the changes to the driver, | |
1270 | * as some drivers used this to restore its orig_* reg domain. | |
1271 | */ | |
1272 | if (initiator == NL80211_REGDOM_SET_BY_CORE && | |
1273 | wiphy->flags & WIPHY_FLAG_CUSTOM_REGULATORY && | |
1274 | wiphy->reg_notifier) | |
1275 | wiphy->reg_notifier(wiphy, last_request); | |
1276 | } | |
d7549cbb SN |
1277 | } |
1278 | ||
1fa25e41 LR |
1279 | static void handle_channel_custom(struct wiphy *wiphy, |
1280 | enum ieee80211_band band, | |
1281 | unsigned int chan_idx, | |
1282 | const struct ieee80211_regdomain *regd) | |
1283 | { | |
1284 | int r; | |
038659e7 LR |
1285 | u32 desired_bw_khz = MHZ_TO_KHZ(20); |
1286 | u32 bw_flags = 0; | |
1fa25e41 LR |
1287 | const struct ieee80211_reg_rule *reg_rule = NULL; |
1288 | const struct ieee80211_power_rule *power_rule = NULL; | |
038659e7 | 1289 | const struct ieee80211_freq_range *freq_range = NULL; |
1fa25e41 LR |
1290 | struct ieee80211_supported_band *sband; |
1291 | struct ieee80211_channel *chan; | |
1292 | ||
abc7381b | 1293 | assert_reg_lock(); |
ac46d48e | 1294 | |
1fa25e41 LR |
1295 | sband = wiphy->bands[band]; |
1296 | BUG_ON(chan_idx >= sband->n_channels); | |
1297 | chan = &sband->channels[chan_idx]; | |
1298 | ||
038659e7 LR |
1299 | r = freq_reg_info_regd(wiphy, |
1300 | MHZ_TO_KHZ(chan->center_freq), | |
1301 | desired_bw_khz, | |
1302 | ®_rule, | |
1303 | regd); | |
1fa25e41 LR |
1304 | |
1305 | if (r) { | |
d91e41b6 | 1306 | REG_DBG_PRINT("Disabling freq %d MHz as custom " |
a6518536 LR |
1307 | "regd has no rule that fits a %d MHz " |
1308 | "wide channel\n", | |
1309 | chan->center_freq, | |
1310 | KHZ_TO_MHZ(desired_bw_khz)); | |
1fa25e41 LR |
1311 | chan->flags = IEEE80211_CHAN_DISABLED; |
1312 | return; | |
1313 | } | |
1314 | ||
e702d3cf LR |
1315 | chan_reg_rule_print_dbg(chan, desired_bw_khz, reg_rule); |
1316 | ||
1fa25e41 | 1317 | power_rule = ®_rule->power_rule; |
038659e7 LR |
1318 | freq_range = ®_rule->freq_range; |
1319 | ||
1320 | if (freq_range->max_bandwidth_khz < MHZ_TO_KHZ(40)) | |
1321 | bw_flags = IEEE80211_CHAN_NO_HT40; | |
1fa25e41 | 1322 | |
038659e7 | 1323 | chan->flags |= map_regdom_flags(reg_rule->flags) | bw_flags; |
1fa25e41 | 1324 | chan->max_antenna_gain = (int) MBI_TO_DBI(power_rule->max_antenna_gain); |
1fa25e41 LR |
1325 | chan->max_power = (int) MBM_TO_DBM(power_rule->max_eirp); |
1326 | } | |
1327 | ||
1328 | static void handle_band_custom(struct wiphy *wiphy, enum ieee80211_band band, | |
1329 | const struct ieee80211_regdomain *regd) | |
1330 | { | |
1331 | unsigned int i; | |
1332 | struct ieee80211_supported_band *sband; | |
1333 | ||
1334 | BUG_ON(!wiphy->bands[band]); | |
1335 | sband = wiphy->bands[band]; | |
1336 | ||
1337 | for (i = 0; i < sband->n_channels; i++) | |
1338 | handle_channel_custom(wiphy, band, i, regd); | |
1339 | } | |
1340 | ||
1341 | /* Used by drivers prior to wiphy registration */ | |
1342 | void wiphy_apply_custom_regulatory(struct wiphy *wiphy, | |
1343 | const struct ieee80211_regdomain *regd) | |
1344 | { | |
1345 | enum ieee80211_band band; | |
bbcf3f02 | 1346 | unsigned int bands_set = 0; |
ac46d48e | 1347 | |
abc7381b | 1348 | mutex_lock(®_mutex); |
1fa25e41 | 1349 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) { |
bbcf3f02 LR |
1350 | if (!wiphy->bands[band]) |
1351 | continue; | |
1352 | handle_band_custom(wiphy, band, regd); | |
1353 | bands_set++; | |
b2e1b302 | 1354 | } |
abc7381b | 1355 | mutex_unlock(®_mutex); |
bbcf3f02 LR |
1356 | |
1357 | /* | |
1358 | * no point in calling this if it won't have any effect | |
1359 | * on your device's supportd bands. | |
1360 | */ | |
1361 | WARN_ON(!bands_set); | |
b2e1b302 | 1362 | } |
1fa25e41 LR |
1363 | EXPORT_SYMBOL(wiphy_apply_custom_regulatory); |
1364 | ||
fb1fc7ad LR |
1365 | /* |
1366 | * Return value which can be used by ignore_request() to indicate | |
1367 | * it has been determined we should intersect two regulatory domains | |
1368 | */ | |
9c96477d LR |
1369 | #define REG_INTERSECT 1 |
1370 | ||
84fa4f43 JB |
1371 | /* This has the logic which determines when a new request |
1372 | * should be ignored. */ | |
2f92cd2e LR |
1373 | static int ignore_request(struct wiphy *wiphy, |
1374 | struct regulatory_request *pending_request) | |
84fa4f43 | 1375 | { |
806a9e39 | 1376 | struct wiphy *last_wiphy = NULL; |
761cf7ec LR |
1377 | |
1378 | assert_cfg80211_lock(); | |
1379 | ||
84fa4f43 JB |
1380 | /* All initial requests are respected */ |
1381 | if (!last_request) | |
1382 | return 0; | |
1383 | ||
2f92cd2e | 1384 | switch (pending_request->initiator) { |
7db90f4a | 1385 | case NL80211_REGDOM_SET_BY_CORE: |
09d989d1 | 1386 | return 0; |
7db90f4a | 1387 | case NL80211_REGDOM_SET_BY_COUNTRY_IE: |
806a9e39 | 1388 | |
57b5ce07 LR |
1389 | if (reg_request_cell_base(last_request)) { |
1390 | /* Trust a Cell base station over the AP's country IE */ | |
1391 | if (regdom_changes(pending_request->alpha2)) | |
1392 | return -EOPNOTSUPP; | |
1393 | return -EALREADY; | |
1394 | } | |
1395 | ||
806a9e39 LR |
1396 | last_wiphy = wiphy_idx_to_wiphy(last_request->wiphy_idx); |
1397 | ||
2f92cd2e | 1398 | if (unlikely(!is_an_alpha2(pending_request->alpha2))) |
84fa4f43 | 1399 | return -EINVAL; |
7db90f4a LR |
1400 | if (last_request->initiator == |
1401 | NL80211_REGDOM_SET_BY_COUNTRY_IE) { | |
806a9e39 | 1402 | if (last_wiphy != wiphy) { |
84fa4f43 JB |
1403 | /* |
1404 | * Two cards with two APs claiming different | |
1fe90b03 | 1405 | * Country IE alpha2s. We could |
84fa4f43 JB |
1406 | * intersect them, but that seems unlikely |
1407 | * to be correct. Reject second one for now. | |
1408 | */ | |
2f92cd2e | 1409 | if (regdom_changes(pending_request->alpha2)) |
84fa4f43 JB |
1410 | return -EOPNOTSUPP; |
1411 | return -EALREADY; | |
1412 | } | |
fb1fc7ad LR |
1413 | /* |
1414 | * Two consecutive Country IE hints on the same wiphy. | |
1415 | * This should be picked up early by the driver/stack | |
1416 | */ | |
2f92cd2e | 1417 | if (WARN_ON(regdom_changes(pending_request->alpha2))) |
84fa4f43 JB |
1418 | return 0; |
1419 | return -EALREADY; | |
1420 | } | |
a171fba4 | 1421 | return 0; |
7db90f4a LR |
1422 | case NL80211_REGDOM_SET_BY_DRIVER: |
1423 | if (last_request->initiator == NL80211_REGDOM_SET_BY_CORE) { | |
2f92cd2e | 1424 | if (regdom_changes(pending_request->alpha2)) |
e74b1e7f | 1425 | return 0; |
84fa4f43 | 1426 | return -EALREADY; |
e74b1e7f | 1427 | } |
fff32c04 LR |
1428 | |
1429 | /* | |
1430 | * This would happen if you unplug and plug your card | |
1431 | * back in or if you add a new device for which the previously | |
1432 | * loaded card also agrees on the regulatory domain. | |
1433 | */ | |
7db90f4a | 1434 | if (last_request->initiator == NL80211_REGDOM_SET_BY_DRIVER && |
2f92cd2e | 1435 | !regdom_changes(pending_request->alpha2)) |
fff32c04 LR |
1436 | return -EALREADY; |
1437 | ||
3e0c3ff3 | 1438 | return REG_INTERSECT; |
7db90f4a | 1439 | case NL80211_REGDOM_SET_BY_USER: |
57b5ce07 LR |
1440 | if (reg_request_cell_base(pending_request)) |
1441 | return reg_ignore_cell_hint(pending_request); | |
1442 | ||
1443 | if (reg_request_cell_base(last_request)) | |
1444 | return -EOPNOTSUPP; | |
1445 | ||
7db90f4a | 1446 | if (last_request->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) |
9c96477d | 1447 | return REG_INTERSECT; |
fb1fc7ad LR |
1448 | /* |
1449 | * If the user knows better the user should set the regdom | |
1450 | * to their country before the IE is picked up | |
1451 | */ | |
7db90f4a | 1452 | if (last_request->initiator == NL80211_REGDOM_SET_BY_USER && |
3f2355cb LR |
1453 | last_request->intersect) |
1454 | return -EOPNOTSUPP; | |
fb1fc7ad LR |
1455 | /* |
1456 | * Process user requests only after previous user/driver/core | |
1457 | * requests have been processed | |
1458 | */ | |
7db90f4a LR |
1459 | if (last_request->initiator == NL80211_REGDOM_SET_BY_CORE || |
1460 | last_request->initiator == NL80211_REGDOM_SET_BY_DRIVER || | |
1461 | last_request->initiator == NL80211_REGDOM_SET_BY_USER) { | |
69b1572b | 1462 | if (regdom_changes(last_request->alpha2)) |
5eebade6 LR |
1463 | return -EAGAIN; |
1464 | } | |
1465 | ||
baeb66fe | 1466 | if (!regdom_changes(pending_request->alpha2)) |
e74b1e7f LR |
1467 | return -EALREADY; |
1468 | ||
84fa4f43 JB |
1469 | return 0; |
1470 | } | |
1471 | ||
1472 | return -EINVAL; | |
1473 | } | |
1474 | ||
b2e253cf LR |
1475 | static void reg_set_request_processed(void) |
1476 | { | |
1477 | bool need_more_processing = false; | |
1478 | ||
1479 | last_request->processed = true; | |
1480 | ||
1481 | spin_lock(®_requests_lock); | |
1482 | if (!list_empty(®_requests_list)) | |
1483 | need_more_processing = true; | |
1484 | spin_unlock(®_requests_lock); | |
1485 | ||
a90c7a31 | 1486 | if (last_request->initiator == NL80211_REGDOM_SET_BY_USER) |
fe20b39e | 1487 | cancel_delayed_work(®_timeout); |
a90c7a31 | 1488 | |
b2e253cf LR |
1489 | if (need_more_processing) |
1490 | schedule_work(®_work); | |
1491 | } | |
1492 | ||
d1c96a9a LR |
1493 | /** |
1494 | * __regulatory_hint - hint to the wireless core a regulatory domain | |
1495 | * @wiphy: if the hint comes from country information from an AP, this | |
1496 | * is required to be set to the wiphy that received the information | |
28da32d7 | 1497 | * @pending_request: the regulatory request currently being processed |
d1c96a9a LR |
1498 | * |
1499 | * The Wireless subsystem can use this function to hint to the wireless core | |
28da32d7 | 1500 | * what it believes should be the current regulatory domain. |
d1c96a9a LR |
1501 | * |
1502 | * Returns zero if all went fine, %-EALREADY if a regulatory domain had | |
1503 | * already been set or other standard error codes. | |
1504 | * | |
abc7381b | 1505 | * Caller must hold &cfg80211_mutex and ®_mutex |
d1c96a9a | 1506 | */ |
28da32d7 LR |
1507 | static int __regulatory_hint(struct wiphy *wiphy, |
1508 | struct regulatory_request *pending_request) | |
b2e1b302 | 1509 | { |
9c96477d | 1510 | bool intersect = false; |
b2e1b302 LR |
1511 | int r = 0; |
1512 | ||
761cf7ec LR |
1513 | assert_cfg80211_lock(); |
1514 | ||
2f92cd2e | 1515 | r = ignore_request(wiphy, pending_request); |
9c96477d | 1516 | |
3e0c3ff3 | 1517 | if (r == REG_INTERSECT) { |
7db90f4a LR |
1518 | if (pending_request->initiator == |
1519 | NL80211_REGDOM_SET_BY_DRIVER) { | |
3e0c3ff3 | 1520 | r = reg_copy_regd(&wiphy->regd, cfg80211_regdomain); |
d951c1dd LR |
1521 | if (r) { |
1522 | kfree(pending_request); | |
3e0c3ff3 | 1523 | return r; |
d951c1dd | 1524 | } |
3e0c3ff3 | 1525 | } |
9c96477d | 1526 | intersect = true; |
3e0c3ff3 | 1527 | } else if (r) { |
fb1fc7ad LR |
1528 | /* |
1529 | * If the regulatory domain being requested by the | |
3e0c3ff3 | 1530 | * driver has already been set just copy it to the |
fb1fc7ad LR |
1531 | * wiphy |
1532 | */ | |
28da32d7 | 1533 | if (r == -EALREADY && |
7db90f4a LR |
1534 | pending_request->initiator == |
1535 | NL80211_REGDOM_SET_BY_DRIVER) { | |
3e0c3ff3 | 1536 | r = reg_copy_regd(&wiphy->regd, cfg80211_regdomain); |
d951c1dd LR |
1537 | if (r) { |
1538 | kfree(pending_request); | |
3e0c3ff3 | 1539 | return r; |
d951c1dd | 1540 | } |
3e0c3ff3 LR |
1541 | r = -EALREADY; |
1542 | goto new_request; | |
1543 | } | |
d951c1dd | 1544 | kfree(pending_request); |
b2e1b302 | 1545 | return r; |
3e0c3ff3 | 1546 | } |
b2e1b302 | 1547 | |
3e0c3ff3 | 1548 | new_request: |
a042994d LR |
1549 | if (last_request != &core_request_world) |
1550 | kfree(last_request); | |
5203cdb6 | 1551 | |
d951c1dd LR |
1552 | last_request = pending_request; |
1553 | last_request->intersect = intersect; | |
5203cdb6 | 1554 | |
d951c1dd | 1555 | pending_request = NULL; |
3e0c3ff3 | 1556 | |
09d989d1 LR |
1557 | if (last_request->initiator == NL80211_REGDOM_SET_BY_USER) { |
1558 | user_alpha2[0] = last_request->alpha2[0]; | |
1559 | user_alpha2[1] = last_request->alpha2[1]; | |
1560 | } | |
1561 | ||
3e0c3ff3 | 1562 | /* When r == REG_INTERSECT we do need to call CRDA */ |
73d54c9e LR |
1563 | if (r < 0) { |
1564 | /* | |
1565 | * Since CRDA will not be called in this case as we already | |
1566 | * have applied the requested regulatory domain before we just | |
1567 | * inform userspace we have processed the request | |
1568 | */ | |
b2e253cf | 1569 | if (r == -EALREADY) { |
73d54c9e | 1570 | nl80211_send_reg_change_event(last_request); |
b2e253cf LR |
1571 | reg_set_request_processed(); |
1572 | } | |
3e0c3ff3 | 1573 | return r; |
73d54c9e | 1574 | } |
3e0c3ff3 | 1575 | |
d951c1dd | 1576 | return call_crda(last_request->alpha2); |
b2e1b302 LR |
1577 | } |
1578 | ||
30a548c7 | 1579 | /* This processes *all* regulatory hints */ |
8848bef0 LR |
1580 | static void reg_process_hint(struct regulatory_request *reg_request, |
1581 | enum nl80211_reg_initiator reg_initiator) | |
fe33eb39 LR |
1582 | { |
1583 | int r = 0; | |
1584 | struct wiphy *wiphy = NULL; | |
1585 | ||
1586 | BUG_ON(!reg_request->alpha2); | |
1587 | ||
fe33eb39 LR |
1588 | if (wiphy_idx_valid(reg_request->wiphy_idx)) |
1589 | wiphy = wiphy_idx_to_wiphy(reg_request->wiphy_idx); | |
1590 | ||
8848bef0 | 1591 | if (reg_initiator == NL80211_REGDOM_SET_BY_DRIVER && |
fe33eb39 | 1592 | !wiphy) { |
d951c1dd | 1593 | kfree(reg_request); |
b0e2880b | 1594 | return; |
fe33eb39 LR |
1595 | } |
1596 | ||
28da32d7 | 1597 | r = __regulatory_hint(wiphy, reg_request); |
fe33eb39 | 1598 | /* This is required so that the orig_* parameters are saved */ |
5be83de5 | 1599 | if (r == -EALREADY && wiphy && |
a90c7a31 | 1600 | wiphy->flags & WIPHY_FLAG_STRICT_REGULATORY) { |
8848bef0 | 1601 | wiphy_update_regulatory(wiphy, reg_initiator); |
a90c7a31 LR |
1602 | return; |
1603 | } | |
1604 | ||
1605 | /* | |
1606 | * We only time out user hints, given that they should be the only | |
1607 | * source of bogus requests. | |
1608 | */ | |
c989bb15 | 1609 | if (r != -EALREADY && |
8848bef0 | 1610 | reg_initiator == NL80211_REGDOM_SET_BY_USER) |
a90c7a31 | 1611 | schedule_delayed_work(®_timeout, msecs_to_jiffies(3142)); |
fe33eb39 LR |
1612 | } |
1613 | ||
b2e253cf LR |
1614 | /* |
1615 | * Processes regulatory hints, this is all the NL80211_REGDOM_SET_BY_* | |
1616 | * Regulatory hints come on a first come first serve basis and we | |
1617 | * must process each one atomically. | |
1618 | */ | |
fe33eb39 | 1619 | static void reg_process_pending_hints(void) |
b0e2880b | 1620 | { |
fe33eb39 | 1621 | struct regulatory_request *reg_request; |
fe33eb39 | 1622 | |
b0e2880b LR |
1623 | mutex_lock(&cfg80211_mutex); |
1624 | mutex_lock(®_mutex); | |
1625 | ||
b2e253cf LR |
1626 | /* When last_request->processed becomes true this will be rescheduled */ |
1627 | if (last_request && !last_request->processed) { | |
1628 | REG_DBG_PRINT("Pending regulatory request, waiting " | |
12c5ffb5 | 1629 | "for it to be processed...\n"); |
b2e253cf LR |
1630 | goto out; |
1631 | } | |
1632 | ||
fe33eb39 | 1633 | spin_lock(®_requests_lock); |
fe33eb39 | 1634 | |
b2e253cf | 1635 | if (list_empty(®_requests_list)) { |
d951c1dd | 1636 | spin_unlock(®_requests_lock); |
b2e253cf | 1637 | goto out; |
fe33eb39 | 1638 | } |
b2e253cf LR |
1639 | |
1640 | reg_request = list_first_entry(®_requests_list, | |
1641 | struct regulatory_request, | |
1642 | list); | |
1643 | list_del_init(®_request->list); | |
1644 | ||
fe33eb39 | 1645 | spin_unlock(®_requests_lock); |
b0e2880b | 1646 | |
8848bef0 | 1647 | reg_process_hint(reg_request, reg_request->initiator); |
b2e253cf LR |
1648 | |
1649 | out: | |
b0e2880b LR |
1650 | mutex_unlock(®_mutex); |
1651 | mutex_unlock(&cfg80211_mutex); | |
fe33eb39 LR |
1652 | } |
1653 | ||
e38f8a7a LR |
1654 | /* Processes beacon hints -- this has nothing to do with country IEs */ |
1655 | static void reg_process_pending_beacon_hints(void) | |
1656 | { | |
79c97e97 | 1657 | struct cfg80211_registered_device *rdev; |
e38f8a7a LR |
1658 | struct reg_beacon *pending_beacon, *tmp; |
1659 | ||
abc7381b LR |
1660 | /* |
1661 | * No need to hold the reg_mutex here as we just touch wiphys | |
1662 | * and do not read or access regulatory variables. | |
1663 | */ | |
e38f8a7a LR |
1664 | mutex_lock(&cfg80211_mutex); |
1665 | ||
1666 | /* This goes through the _pending_ beacon list */ | |
1667 | spin_lock_bh(®_pending_beacons_lock); | |
1668 | ||
1669 | if (list_empty(®_pending_beacons)) { | |
1670 | spin_unlock_bh(®_pending_beacons_lock); | |
1671 | goto out; | |
1672 | } | |
1673 | ||
1674 | list_for_each_entry_safe(pending_beacon, tmp, | |
1675 | ®_pending_beacons, list) { | |
1676 | ||
1677 | list_del_init(&pending_beacon->list); | |
1678 | ||
1679 | /* Applies the beacon hint to current wiphys */ | |
79c97e97 JB |
1680 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) |
1681 | wiphy_update_new_beacon(&rdev->wiphy, pending_beacon); | |
e38f8a7a LR |
1682 | |
1683 | /* Remembers the beacon hint for new wiphys or reg changes */ | |
1684 | list_add_tail(&pending_beacon->list, ®_beacon_list); | |
1685 | } | |
1686 | ||
1687 | spin_unlock_bh(®_pending_beacons_lock); | |
1688 | out: | |
1689 | mutex_unlock(&cfg80211_mutex); | |
1690 | } | |
1691 | ||
fe33eb39 LR |
1692 | static void reg_todo(struct work_struct *work) |
1693 | { | |
1694 | reg_process_pending_hints(); | |
e38f8a7a | 1695 | reg_process_pending_beacon_hints(); |
fe33eb39 LR |
1696 | } |
1697 | ||
fe33eb39 LR |
1698 | static void queue_regulatory_request(struct regulatory_request *request) |
1699 | { | |
c61029c7 JL |
1700 | if (isalpha(request->alpha2[0])) |
1701 | request->alpha2[0] = toupper(request->alpha2[0]); | |
1702 | if (isalpha(request->alpha2[1])) | |
1703 | request->alpha2[1] = toupper(request->alpha2[1]); | |
1704 | ||
fe33eb39 LR |
1705 | spin_lock(®_requests_lock); |
1706 | list_add_tail(&request->list, ®_requests_list); | |
1707 | spin_unlock(®_requests_lock); | |
1708 | ||
1709 | schedule_work(®_work); | |
1710 | } | |
1711 | ||
09d989d1 LR |
1712 | /* |
1713 | * Core regulatory hint -- happens during cfg80211_init() | |
1714 | * and when we restore regulatory settings. | |
1715 | */ | |
ba25c141 LR |
1716 | static int regulatory_hint_core(const char *alpha2) |
1717 | { | |
1718 | struct regulatory_request *request; | |
1719 | ||
ba25c141 LR |
1720 | request = kzalloc(sizeof(struct regulatory_request), |
1721 | GFP_KERNEL); | |
1722 | if (!request) | |
1723 | return -ENOMEM; | |
1724 | ||
1725 | request->alpha2[0] = alpha2[0]; | |
1726 | request->alpha2[1] = alpha2[1]; | |
7db90f4a | 1727 | request->initiator = NL80211_REGDOM_SET_BY_CORE; |
ba25c141 | 1728 | |
31e99729 | 1729 | queue_regulatory_request(request); |
5078b2e3 | 1730 | |
fe33eb39 | 1731 | return 0; |
ba25c141 LR |
1732 | } |
1733 | ||
fe33eb39 | 1734 | /* User hints */ |
57b5ce07 LR |
1735 | int regulatory_hint_user(const char *alpha2, |
1736 | enum nl80211_user_reg_hint_type user_reg_hint_type) | |
b2e1b302 | 1737 | { |
fe33eb39 LR |
1738 | struct regulatory_request *request; |
1739 | ||
be3d4810 | 1740 | BUG_ON(!alpha2); |
b2e1b302 | 1741 | |
fe33eb39 LR |
1742 | request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); |
1743 | if (!request) | |
1744 | return -ENOMEM; | |
1745 | ||
1746 | request->wiphy_idx = WIPHY_IDX_STALE; | |
1747 | request->alpha2[0] = alpha2[0]; | |
1748 | request->alpha2[1] = alpha2[1]; | |
e12822e1 | 1749 | request->initiator = NL80211_REGDOM_SET_BY_USER; |
57b5ce07 | 1750 | request->user_reg_hint_type = user_reg_hint_type; |
fe33eb39 LR |
1751 | |
1752 | queue_regulatory_request(request); | |
1753 | ||
1754 | return 0; | |
1755 | } | |
1756 | ||
1757 | /* Driver hints */ | |
1758 | int regulatory_hint(struct wiphy *wiphy, const char *alpha2) | |
1759 | { | |
1760 | struct regulatory_request *request; | |
1761 | ||
1762 | BUG_ON(!alpha2); | |
1763 | BUG_ON(!wiphy); | |
1764 | ||
1765 | request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); | |
1766 | if (!request) | |
1767 | return -ENOMEM; | |
1768 | ||
1769 | request->wiphy_idx = get_wiphy_idx(wiphy); | |
1770 | ||
1771 | /* Must have registered wiphy first */ | |
1772 | BUG_ON(!wiphy_idx_valid(request->wiphy_idx)); | |
1773 | ||
1774 | request->alpha2[0] = alpha2[0]; | |
1775 | request->alpha2[1] = alpha2[1]; | |
7db90f4a | 1776 | request->initiator = NL80211_REGDOM_SET_BY_DRIVER; |
fe33eb39 LR |
1777 | |
1778 | queue_regulatory_request(request); | |
1779 | ||
1780 | return 0; | |
b2e1b302 LR |
1781 | } |
1782 | EXPORT_SYMBOL(regulatory_hint); | |
1783 | ||
4b44c8bc LR |
1784 | /* |
1785 | * We hold wdev_lock() here so we cannot hold cfg80211_mutex() and | |
1786 | * therefore cannot iterate over the rdev list here. | |
1787 | */ | |
3f2355cb | 1788 | void regulatory_hint_11d(struct wiphy *wiphy, |
84920e3e LR |
1789 | enum ieee80211_band band, |
1790 | u8 *country_ie, | |
1791 | u8 country_ie_len) | |
3f2355cb | 1792 | { |
3f2355cb | 1793 | char alpha2[2]; |
3f2355cb | 1794 | enum environment_cap env = ENVIRON_ANY; |
fe33eb39 | 1795 | struct regulatory_request *request; |
3f2355cb | 1796 | |
abc7381b | 1797 | mutex_lock(®_mutex); |
3f2355cb | 1798 | |
9828b017 LR |
1799 | if (unlikely(!last_request)) |
1800 | goto out; | |
d335fe63 | 1801 | |
3f2355cb LR |
1802 | /* IE len must be evenly divisible by 2 */ |
1803 | if (country_ie_len & 0x01) | |
1804 | goto out; | |
1805 | ||
1806 | if (country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN) | |
1807 | goto out; | |
1808 | ||
3f2355cb LR |
1809 | alpha2[0] = country_ie[0]; |
1810 | alpha2[1] = country_ie[1]; | |
1811 | ||
1812 | if (country_ie[2] == 'I') | |
1813 | env = ENVIRON_INDOOR; | |
1814 | else if (country_ie[2] == 'O') | |
1815 | env = ENVIRON_OUTDOOR; | |
1816 | ||
fb1fc7ad | 1817 | /* |
8b19e6ca | 1818 | * We will run this only upon a successful connection on cfg80211. |
4b44c8bc LR |
1819 | * We leave conflict resolution to the workqueue, where can hold |
1820 | * cfg80211_mutex. | |
fb1fc7ad | 1821 | */ |
cc0b6fe8 LR |
1822 | if (likely(last_request->initiator == |
1823 | NL80211_REGDOM_SET_BY_COUNTRY_IE && | |
4b44c8bc LR |
1824 | wiphy_idx_valid(last_request->wiphy_idx))) |
1825 | goto out; | |
3f2355cb | 1826 | |
fe33eb39 LR |
1827 | request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); |
1828 | if (!request) | |
f9f9b6e3 | 1829 | goto out; |
fe33eb39 | 1830 | |
fe33eb39 | 1831 | request->wiphy_idx = get_wiphy_idx(wiphy); |
4f366c5d JL |
1832 | request->alpha2[0] = alpha2[0]; |
1833 | request->alpha2[1] = alpha2[1]; | |
7db90f4a | 1834 | request->initiator = NL80211_REGDOM_SET_BY_COUNTRY_IE; |
fe33eb39 LR |
1835 | request->country_ie_env = env; |
1836 | ||
abc7381b | 1837 | mutex_unlock(®_mutex); |
3f2355cb | 1838 | |
fe33eb39 LR |
1839 | queue_regulatory_request(request); |
1840 | ||
1841 | return; | |
0441d6ff | 1842 | |
3f2355cb | 1843 | out: |
abc7381b | 1844 | mutex_unlock(®_mutex); |
3f2355cb | 1845 | } |
b2e1b302 | 1846 | |
09d989d1 LR |
1847 | static void restore_alpha2(char *alpha2, bool reset_user) |
1848 | { | |
1849 | /* indicates there is no alpha2 to consider for restoration */ | |
1850 | alpha2[0] = '9'; | |
1851 | alpha2[1] = '7'; | |
1852 | ||
1853 | /* The user setting has precedence over the module parameter */ | |
1854 | if (is_user_regdom_saved()) { | |
1855 | /* Unless we're asked to ignore it and reset it */ | |
1856 | if (reset_user) { | |
d91e41b6 | 1857 | REG_DBG_PRINT("Restoring regulatory settings " |
09d989d1 LR |
1858 | "including user preference\n"); |
1859 | user_alpha2[0] = '9'; | |
1860 | user_alpha2[1] = '7'; | |
1861 | ||
1862 | /* | |
1863 | * If we're ignoring user settings, we still need to | |
1864 | * check the module parameter to ensure we put things | |
1865 | * back as they were for a full restore. | |
1866 | */ | |
1867 | if (!is_world_regdom(ieee80211_regdom)) { | |
d91e41b6 | 1868 | REG_DBG_PRINT("Keeping preference on " |
09d989d1 LR |
1869 | "module parameter ieee80211_regdom: %c%c\n", |
1870 | ieee80211_regdom[0], | |
1871 | ieee80211_regdom[1]); | |
1872 | alpha2[0] = ieee80211_regdom[0]; | |
1873 | alpha2[1] = ieee80211_regdom[1]; | |
1874 | } | |
1875 | } else { | |
d91e41b6 | 1876 | REG_DBG_PRINT("Restoring regulatory settings " |
09d989d1 LR |
1877 | "while preserving user preference for: %c%c\n", |
1878 | user_alpha2[0], | |
1879 | user_alpha2[1]); | |
1880 | alpha2[0] = user_alpha2[0]; | |
1881 | alpha2[1] = user_alpha2[1]; | |
1882 | } | |
1883 | } else if (!is_world_regdom(ieee80211_regdom)) { | |
d91e41b6 | 1884 | REG_DBG_PRINT("Keeping preference on " |
09d989d1 LR |
1885 | "module parameter ieee80211_regdom: %c%c\n", |
1886 | ieee80211_regdom[0], | |
1887 | ieee80211_regdom[1]); | |
1888 | alpha2[0] = ieee80211_regdom[0]; | |
1889 | alpha2[1] = ieee80211_regdom[1]; | |
1890 | } else | |
d91e41b6 | 1891 | REG_DBG_PRINT("Restoring regulatory settings\n"); |
09d989d1 LR |
1892 | } |
1893 | ||
5ce543d1 RM |
1894 | static void restore_custom_reg_settings(struct wiphy *wiphy) |
1895 | { | |
1896 | struct ieee80211_supported_band *sband; | |
1897 | enum ieee80211_band band; | |
1898 | struct ieee80211_channel *chan; | |
1899 | int i; | |
1900 | ||
1901 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) { | |
1902 | sband = wiphy->bands[band]; | |
1903 | if (!sband) | |
1904 | continue; | |
1905 | for (i = 0; i < sband->n_channels; i++) { | |
1906 | chan = &sband->channels[i]; | |
1907 | chan->flags = chan->orig_flags; | |
1908 | chan->max_antenna_gain = chan->orig_mag; | |
1909 | chan->max_power = chan->orig_mpwr; | |
899852af | 1910 | chan->beacon_found = false; |
5ce543d1 RM |
1911 | } |
1912 | } | |
1913 | } | |
1914 | ||
09d989d1 LR |
1915 | /* |
1916 | * Restoring regulatory settings involves ingoring any | |
1917 | * possibly stale country IE information and user regulatory | |
1918 | * settings if so desired, this includes any beacon hints | |
1919 | * learned as we could have traveled outside to another country | |
1920 | * after disconnection. To restore regulatory settings we do | |
1921 | * exactly what we did at bootup: | |
1922 | * | |
1923 | * - send a core regulatory hint | |
1924 | * - send a user regulatory hint if applicable | |
1925 | * | |
1926 | * Device drivers that send a regulatory hint for a specific country | |
1927 | * keep their own regulatory domain on wiphy->regd so that does does | |
1928 | * not need to be remembered. | |
1929 | */ | |
1930 | static void restore_regulatory_settings(bool reset_user) | |
1931 | { | |
1932 | char alpha2[2]; | |
cee0bec5 | 1933 | char world_alpha2[2]; |
09d989d1 | 1934 | struct reg_beacon *reg_beacon, *btmp; |
14609555 LR |
1935 | struct regulatory_request *reg_request, *tmp; |
1936 | LIST_HEAD(tmp_reg_req_list); | |
5ce543d1 | 1937 | struct cfg80211_registered_device *rdev; |
09d989d1 LR |
1938 | |
1939 | mutex_lock(&cfg80211_mutex); | |
1940 | mutex_lock(®_mutex); | |
1941 | ||
a042994d | 1942 | reset_regdomains(true); |
09d989d1 LR |
1943 | restore_alpha2(alpha2, reset_user); |
1944 | ||
14609555 LR |
1945 | /* |
1946 | * If there's any pending requests we simply | |
1947 | * stash them to a temporary pending queue and | |
1948 | * add then after we've restored regulatory | |
1949 | * settings. | |
1950 | */ | |
1951 | spin_lock(®_requests_lock); | |
1952 | if (!list_empty(®_requests_list)) { | |
1953 | list_for_each_entry_safe(reg_request, tmp, | |
1954 | ®_requests_list, list) { | |
1955 | if (reg_request->initiator != | |
1956 | NL80211_REGDOM_SET_BY_USER) | |
1957 | continue; | |
1958 | list_del(®_request->list); | |
1959 | list_add_tail(®_request->list, &tmp_reg_req_list); | |
1960 | } | |
1961 | } | |
1962 | spin_unlock(®_requests_lock); | |
1963 | ||
09d989d1 LR |
1964 | /* Clear beacon hints */ |
1965 | spin_lock_bh(®_pending_beacons_lock); | |
1966 | if (!list_empty(®_pending_beacons)) { | |
1967 | list_for_each_entry_safe(reg_beacon, btmp, | |
1968 | ®_pending_beacons, list) { | |
1969 | list_del(®_beacon->list); | |
1970 | kfree(reg_beacon); | |
1971 | } | |
1972 | } | |
1973 | spin_unlock_bh(®_pending_beacons_lock); | |
1974 | ||
1975 | if (!list_empty(®_beacon_list)) { | |
1976 | list_for_each_entry_safe(reg_beacon, btmp, | |
1977 | ®_beacon_list, list) { | |
1978 | list_del(®_beacon->list); | |
1979 | kfree(reg_beacon); | |
1980 | } | |
1981 | } | |
1982 | ||
1983 | /* First restore to the basic regulatory settings */ | |
1984 | cfg80211_regdomain = cfg80211_world_regdom; | |
cee0bec5 DS |
1985 | world_alpha2[0] = cfg80211_regdomain->alpha2[0]; |
1986 | world_alpha2[1] = cfg80211_regdomain->alpha2[1]; | |
09d989d1 | 1987 | |
5ce543d1 RM |
1988 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) { |
1989 | if (rdev->wiphy.flags & WIPHY_FLAG_CUSTOM_REGULATORY) | |
1990 | restore_custom_reg_settings(&rdev->wiphy); | |
1991 | } | |
1992 | ||
09d989d1 LR |
1993 | mutex_unlock(®_mutex); |
1994 | mutex_unlock(&cfg80211_mutex); | |
1995 | ||
cee0bec5 | 1996 | regulatory_hint_core(world_alpha2); |
09d989d1 LR |
1997 | |
1998 | /* | |
1999 | * This restores the ieee80211_regdom module parameter | |
2000 | * preference or the last user requested regulatory | |
2001 | * settings, user regulatory settings takes precedence. | |
2002 | */ | |
2003 | if (is_an_alpha2(alpha2)) | |
57b5ce07 | 2004 | regulatory_hint_user(user_alpha2, NL80211_USER_REG_HINT_USER); |
09d989d1 | 2005 | |
14609555 LR |
2006 | if (list_empty(&tmp_reg_req_list)) |
2007 | return; | |
2008 | ||
2009 | mutex_lock(&cfg80211_mutex); | |
2010 | mutex_lock(®_mutex); | |
2011 | ||
2012 | spin_lock(®_requests_lock); | |
2013 | list_for_each_entry_safe(reg_request, tmp, &tmp_reg_req_list, list) { | |
2014 | REG_DBG_PRINT("Adding request for country %c%c back " | |
2015 | "into the queue\n", | |
2016 | reg_request->alpha2[0], | |
2017 | reg_request->alpha2[1]); | |
2018 | list_del(®_request->list); | |
2019 | list_add_tail(®_request->list, ®_requests_list); | |
2020 | } | |
2021 | spin_unlock(®_requests_lock); | |
2022 | ||
2023 | mutex_unlock(®_mutex); | |
2024 | mutex_unlock(&cfg80211_mutex); | |
2025 | ||
2026 | REG_DBG_PRINT("Kicking the queue\n"); | |
2027 | ||
2028 | schedule_work(®_work); | |
2029 | } | |
09d989d1 LR |
2030 | |
2031 | void regulatory_hint_disconnect(void) | |
2032 | { | |
d91e41b6 | 2033 | REG_DBG_PRINT("All devices are disconnected, going to " |
09d989d1 LR |
2034 | "restore regulatory settings\n"); |
2035 | restore_regulatory_settings(false); | |
2036 | } | |
2037 | ||
e38f8a7a LR |
2038 | static bool freq_is_chan_12_13_14(u16 freq) |
2039 | { | |
59eb21a6 BR |
2040 | if (freq == ieee80211_channel_to_frequency(12, IEEE80211_BAND_2GHZ) || |
2041 | freq == ieee80211_channel_to_frequency(13, IEEE80211_BAND_2GHZ) || | |
2042 | freq == ieee80211_channel_to_frequency(14, IEEE80211_BAND_2GHZ)) | |
e38f8a7a LR |
2043 | return true; |
2044 | return false; | |
2045 | } | |
2046 | ||
2047 | int regulatory_hint_found_beacon(struct wiphy *wiphy, | |
2048 | struct ieee80211_channel *beacon_chan, | |
2049 | gfp_t gfp) | |
2050 | { | |
2051 | struct reg_beacon *reg_beacon; | |
2052 | ||
2053 | if (likely((beacon_chan->beacon_found || | |
2054 | (beacon_chan->flags & IEEE80211_CHAN_RADAR) || | |
2055 | (beacon_chan->band == IEEE80211_BAND_2GHZ && | |
2056 | !freq_is_chan_12_13_14(beacon_chan->center_freq))))) | |
2057 | return 0; | |
2058 | ||
2059 | reg_beacon = kzalloc(sizeof(struct reg_beacon), gfp); | |
2060 | if (!reg_beacon) | |
2061 | return -ENOMEM; | |
2062 | ||
d91e41b6 | 2063 | REG_DBG_PRINT("Found new beacon on " |
4113f751 LR |
2064 | "frequency: %d MHz (Ch %d) on %s\n", |
2065 | beacon_chan->center_freq, | |
2066 | ieee80211_frequency_to_channel(beacon_chan->center_freq), | |
2067 | wiphy_name(wiphy)); | |
2068 | ||
e38f8a7a LR |
2069 | memcpy(®_beacon->chan, beacon_chan, |
2070 | sizeof(struct ieee80211_channel)); | |
2071 | ||
2072 | ||
2073 | /* | |
2074 | * Since we can be called from BH or and non-BH context | |
2075 | * we must use spin_lock_bh() | |
2076 | */ | |
2077 | spin_lock_bh(®_pending_beacons_lock); | |
2078 | list_add_tail(®_beacon->list, ®_pending_beacons); | |
2079 | spin_unlock_bh(®_pending_beacons_lock); | |
2080 | ||
2081 | schedule_work(®_work); | |
2082 | ||
2083 | return 0; | |
2084 | } | |
2085 | ||
a3d2eaf0 | 2086 | static void print_rd_rules(const struct ieee80211_regdomain *rd) |
b2e1b302 LR |
2087 | { |
2088 | unsigned int i; | |
a3d2eaf0 JB |
2089 | const struct ieee80211_reg_rule *reg_rule = NULL; |
2090 | const struct ieee80211_freq_range *freq_range = NULL; | |
2091 | const struct ieee80211_power_rule *power_rule = NULL; | |
b2e1b302 | 2092 | |
6653325a | 2093 | pr_info(" (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)\n"); |
b2e1b302 LR |
2094 | |
2095 | for (i = 0; i < rd->n_reg_rules; i++) { | |
2096 | reg_rule = &rd->reg_rules[i]; | |
2097 | freq_range = ®_rule->freq_range; | |
2098 | power_rule = ®_rule->power_rule; | |
2099 | ||
fb1fc7ad LR |
2100 | /* |
2101 | * There may not be documentation for max antenna gain | |
2102 | * in certain regions | |
2103 | */ | |
b2e1b302 | 2104 | if (power_rule->max_antenna_gain) |
6653325a | 2105 | pr_info(" (%d KHz - %d KHz @ %d KHz), (%d mBi, %d mBm)\n", |
b2e1b302 LR |
2106 | freq_range->start_freq_khz, |
2107 | freq_range->end_freq_khz, | |
2108 | freq_range->max_bandwidth_khz, | |
2109 | power_rule->max_antenna_gain, | |
2110 | power_rule->max_eirp); | |
2111 | else | |
6653325a | 2112 | pr_info(" (%d KHz - %d KHz @ %d KHz), (N/A, %d mBm)\n", |
b2e1b302 LR |
2113 | freq_range->start_freq_khz, |
2114 | freq_range->end_freq_khz, | |
2115 | freq_range->max_bandwidth_khz, | |
2116 | power_rule->max_eirp); | |
2117 | } | |
2118 | } | |
2119 | ||
8b60b078 LR |
2120 | bool reg_supported_dfs_region(u8 dfs_region) |
2121 | { | |
2122 | switch (dfs_region) { | |
2123 | case NL80211_DFS_UNSET: | |
2124 | case NL80211_DFS_FCC: | |
2125 | case NL80211_DFS_ETSI: | |
2126 | case NL80211_DFS_JP: | |
2127 | return true; | |
2128 | default: | |
2129 | REG_DBG_PRINT("Ignoring uknown DFS master region: %d\n", | |
2130 | dfs_region); | |
2131 | return false; | |
2132 | } | |
2133 | } | |
2134 | ||
2135 | static void print_dfs_region(u8 dfs_region) | |
2136 | { | |
2137 | if (!dfs_region) | |
2138 | return; | |
2139 | ||
2140 | switch (dfs_region) { | |
2141 | case NL80211_DFS_FCC: | |
2142 | pr_info(" DFS Master region FCC"); | |
2143 | break; | |
2144 | case NL80211_DFS_ETSI: | |
2145 | pr_info(" DFS Master region ETSI"); | |
2146 | break; | |
2147 | case NL80211_DFS_JP: | |
2148 | pr_info(" DFS Master region JP"); | |
2149 | break; | |
2150 | default: | |
2151 | pr_info(" DFS Master region Uknown"); | |
2152 | break; | |
2153 | } | |
2154 | } | |
2155 | ||
a3d2eaf0 | 2156 | static void print_regdomain(const struct ieee80211_regdomain *rd) |
b2e1b302 LR |
2157 | { |
2158 | ||
3f2355cb | 2159 | if (is_intersected_alpha2(rd->alpha2)) { |
3f2355cb | 2160 | |
7db90f4a LR |
2161 | if (last_request->initiator == |
2162 | NL80211_REGDOM_SET_BY_COUNTRY_IE) { | |
79c97e97 JB |
2163 | struct cfg80211_registered_device *rdev; |
2164 | rdev = cfg80211_rdev_by_wiphy_idx( | |
806a9e39 | 2165 | last_request->wiphy_idx); |
79c97e97 | 2166 | if (rdev) { |
e9c0268f | 2167 | pr_info("Current regulatory domain updated by AP to: %c%c\n", |
79c97e97 JB |
2168 | rdev->country_ie_alpha2[0], |
2169 | rdev->country_ie_alpha2[1]); | |
3f2355cb | 2170 | } else |
e9c0268f | 2171 | pr_info("Current regulatory domain intersected:\n"); |
3f2355cb | 2172 | } else |
e9c0268f | 2173 | pr_info("Current regulatory domain intersected:\n"); |
3f2355cb | 2174 | } else if (is_world_regdom(rd->alpha2)) |
e9c0268f | 2175 | pr_info("World regulatory domain updated:\n"); |
b2e1b302 LR |
2176 | else { |
2177 | if (is_unknown_alpha2(rd->alpha2)) | |
e9c0268f | 2178 | pr_info("Regulatory domain changed to driver built-in settings (unknown country)\n"); |
57b5ce07 LR |
2179 | else { |
2180 | if (reg_request_cell_base(last_request)) | |
2181 | pr_info("Regulatory domain changed " | |
2182 | "to country: %c%c by Cell Station\n", | |
2183 | rd->alpha2[0], rd->alpha2[1]); | |
2184 | else | |
2185 | pr_info("Regulatory domain changed " | |
2186 | "to country: %c%c\n", | |
2187 | rd->alpha2[0], rd->alpha2[1]); | |
2188 | } | |
b2e1b302 | 2189 | } |
8b60b078 | 2190 | print_dfs_region(rd->dfs_region); |
b2e1b302 LR |
2191 | print_rd_rules(rd); |
2192 | } | |
2193 | ||
2df78167 | 2194 | static void print_regdomain_info(const struct ieee80211_regdomain *rd) |
b2e1b302 | 2195 | { |
e9c0268f | 2196 | pr_info("Regulatory domain: %c%c\n", rd->alpha2[0], rd->alpha2[1]); |
b2e1b302 LR |
2197 | print_rd_rules(rd); |
2198 | } | |
2199 | ||
d2372b31 | 2200 | /* Takes ownership of rd only if it doesn't fail */ |
a3d2eaf0 | 2201 | static int __set_regdom(const struct ieee80211_regdomain *rd) |
b2e1b302 | 2202 | { |
9c96477d | 2203 | const struct ieee80211_regdomain *intersected_rd = NULL; |
79c97e97 | 2204 | struct cfg80211_registered_device *rdev = NULL; |
806a9e39 | 2205 | struct wiphy *request_wiphy; |
b2e1b302 LR |
2206 | /* Some basic sanity checks first */ |
2207 | ||
b2e1b302 | 2208 | if (is_world_regdom(rd->alpha2)) { |
f6037d09 | 2209 | if (WARN_ON(!reg_is_valid_request(rd->alpha2))) |
b2e1b302 LR |
2210 | return -EINVAL; |
2211 | update_world_regdomain(rd); | |
2212 | return 0; | |
2213 | } | |
b2e1b302 LR |
2214 | |
2215 | if (!is_alpha2_set(rd->alpha2) && !is_an_alpha2(rd->alpha2) && | |
2216 | !is_unknown_alpha2(rd->alpha2)) | |
2217 | return -EINVAL; | |
2218 | ||
f6037d09 | 2219 | if (!last_request) |
b2e1b302 LR |
2220 | return -EINVAL; |
2221 | ||
fb1fc7ad LR |
2222 | /* |
2223 | * Lets only bother proceeding on the same alpha2 if the current | |
3f2355cb | 2224 | * rd is non static (it means CRDA was present and was used last) |
fb1fc7ad LR |
2225 | * and the pending request came in from a country IE |
2226 | */ | |
7db90f4a | 2227 | if (last_request->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE) { |
fb1fc7ad LR |
2228 | /* |
2229 | * If someone else asked us to change the rd lets only bother | |
2230 | * checking if the alpha2 changes if CRDA was already called | |
2231 | */ | |
baeb66fe | 2232 | if (!regdom_changes(rd->alpha2)) |
95908535 | 2233 | return -EALREADY; |
3f2355cb LR |
2234 | } |
2235 | ||
fb1fc7ad LR |
2236 | /* |
2237 | * Now lets set the regulatory domain, update all driver channels | |
b2e1b302 LR |
2238 | * and finally inform them of what we have done, in case they want |
2239 | * to review or adjust their own settings based on their own | |
fb1fc7ad LR |
2240 | * internal EEPROM data |
2241 | */ | |
b2e1b302 | 2242 | |
f6037d09 | 2243 | if (WARN_ON(!reg_is_valid_request(rd->alpha2))) |
b2e1b302 LR |
2244 | return -EINVAL; |
2245 | ||
8375af3b | 2246 | if (!is_valid_rd(rd)) { |
e9c0268f | 2247 | pr_err("Invalid regulatory domain detected:\n"); |
8375af3b LR |
2248 | print_regdomain_info(rd); |
2249 | return -EINVAL; | |
b2e1b302 LR |
2250 | } |
2251 | ||
806a9e39 | 2252 | request_wiphy = wiphy_idx_to_wiphy(last_request->wiphy_idx); |
0bac71af LR |
2253 | if (!request_wiphy && |
2254 | (last_request->initiator == NL80211_REGDOM_SET_BY_DRIVER || | |
2255 | last_request->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE)) { | |
2256 | schedule_delayed_work(®_timeout, 0); | |
de3584bd JB |
2257 | return -ENODEV; |
2258 | } | |
806a9e39 | 2259 | |
b8295acd | 2260 | if (!last_request->intersect) { |
3e0c3ff3 LR |
2261 | int r; |
2262 | ||
7db90f4a | 2263 | if (last_request->initiator != NL80211_REGDOM_SET_BY_DRIVER) { |
a042994d | 2264 | reset_regdomains(false); |
3e0c3ff3 LR |
2265 | cfg80211_regdomain = rd; |
2266 | return 0; | |
2267 | } | |
2268 | ||
fb1fc7ad LR |
2269 | /* |
2270 | * For a driver hint, lets copy the regulatory domain the | |
2271 | * driver wanted to the wiphy to deal with conflicts | |
2272 | */ | |
3e0c3ff3 | 2273 | |
558f6d32 LR |
2274 | /* |
2275 | * Userspace could have sent two replies with only | |
2276 | * one kernel request. | |
2277 | */ | |
2278 | if (request_wiphy->regd) | |
2279 | return -EALREADY; | |
3e0c3ff3 | 2280 | |
806a9e39 | 2281 | r = reg_copy_regd(&request_wiphy->regd, rd); |
3e0c3ff3 LR |
2282 | if (r) |
2283 | return r; | |
2284 | ||
a042994d | 2285 | reset_regdomains(false); |
b8295acd LR |
2286 | cfg80211_regdomain = rd; |
2287 | return 0; | |
2288 | } | |
2289 | ||
2290 | /* Intersection requires a bit more work */ | |
2291 | ||
7db90f4a | 2292 | if (last_request->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE) { |
b8295acd | 2293 | |
9c96477d LR |
2294 | intersected_rd = regdom_intersect(rd, cfg80211_regdomain); |
2295 | if (!intersected_rd) | |
2296 | return -EINVAL; | |
b8295acd | 2297 | |
fb1fc7ad LR |
2298 | /* |
2299 | * We can trash what CRDA provided now. | |
3e0c3ff3 | 2300 | * However if a driver requested this specific regulatory |
fb1fc7ad LR |
2301 | * domain we keep it for its private use |
2302 | */ | |
7db90f4a | 2303 | if (last_request->initiator == NL80211_REGDOM_SET_BY_DRIVER) |
806a9e39 | 2304 | request_wiphy->regd = rd; |
3e0c3ff3 LR |
2305 | else |
2306 | kfree(rd); | |
2307 | ||
b8295acd LR |
2308 | rd = NULL; |
2309 | ||
a042994d | 2310 | reset_regdomains(false); |
b8295acd LR |
2311 | cfg80211_regdomain = intersected_rd; |
2312 | ||
2313 | return 0; | |
9c96477d LR |
2314 | } |
2315 | ||
3f2355cb LR |
2316 | if (!intersected_rd) |
2317 | return -EINVAL; | |
2318 | ||
79c97e97 | 2319 | rdev = wiphy_to_dev(request_wiphy); |
3f2355cb | 2320 | |
79c97e97 JB |
2321 | rdev->country_ie_alpha2[0] = rd->alpha2[0]; |
2322 | rdev->country_ie_alpha2[1] = rd->alpha2[1]; | |
2323 | rdev->env = last_request->country_ie_env; | |
3f2355cb LR |
2324 | |
2325 | BUG_ON(intersected_rd == rd); | |
2326 | ||
2327 | kfree(rd); | |
2328 | rd = NULL; | |
2329 | ||
a042994d | 2330 | reset_regdomains(false); |
3f2355cb | 2331 | cfg80211_regdomain = intersected_rd; |
b2e1b302 LR |
2332 | |
2333 | return 0; | |
2334 | } | |
2335 | ||
2336 | ||
fb1fc7ad LR |
2337 | /* |
2338 | * Use this call to set the current regulatory domain. Conflicts with | |
b2e1b302 | 2339 | * multiple drivers can be ironed out later. Caller must've already |
fb1fc7ad LR |
2340 | * kmalloc'd the rd structure. Caller must hold cfg80211_mutex |
2341 | */ | |
a3d2eaf0 | 2342 | int set_regdom(const struct ieee80211_regdomain *rd) |
b2e1b302 | 2343 | { |
b2e1b302 LR |
2344 | int r; |
2345 | ||
761cf7ec LR |
2346 | assert_cfg80211_lock(); |
2347 | ||
abc7381b LR |
2348 | mutex_lock(®_mutex); |
2349 | ||
b2e1b302 LR |
2350 | /* Note that this doesn't update the wiphys, this is done below */ |
2351 | r = __set_regdom(rd); | |
d2372b31 | 2352 | if (r) { |
95908535 KV |
2353 | if (r == -EALREADY) |
2354 | reg_set_request_processed(); | |
2355 | ||
d2372b31 | 2356 | kfree(rd); |
abc7381b | 2357 | mutex_unlock(®_mutex); |
b2e1b302 | 2358 | return r; |
d2372b31 | 2359 | } |
b2e1b302 | 2360 | |
b2e1b302 | 2361 | /* This would make this whole thing pointless */ |
a01ddafd LR |
2362 | if (!last_request->intersect) |
2363 | BUG_ON(rd != cfg80211_regdomain); | |
b2e1b302 LR |
2364 | |
2365 | /* update all wiphys now with the new established regulatory domain */ | |
f6037d09 | 2366 | update_all_wiphy_regulatory(last_request->initiator); |
b2e1b302 | 2367 | |
a01ddafd | 2368 | print_regdomain(cfg80211_regdomain); |
b2e1b302 | 2369 | |
73d54c9e LR |
2370 | nl80211_send_reg_change_event(last_request); |
2371 | ||
b2e253cf LR |
2372 | reg_set_request_processed(); |
2373 | ||
abc7381b LR |
2374 | mutex_unlock(®_mutex); |
2375 | ||
b2e1b302 LR |
2376 | return r; |
2377 | } | |
2378 | ||
4d9d88d1 SJR |
2379 | #ifdef CONFIG_HOTPLUG |
2380 | int reg_device_uevent(struct device *dev, struct kobj_uevent_env *env) | |
2381 | { | |
2382 | if (last_request && !last_request->processed) { | |
2383 | if (add_uevent_var(env, "COUNTRY=%c%c", | |
2384 | last_request->alpha2[0], | |
2385 | last_request->alpha2[1])) | |
2386 | return -ENOMEM; | |
2387 | } | |
2388 | ||
2389 | return 0; | |
2390 | } | |
2391 | #else | |
2392 | int reg_device_uevent(struct device *dev, struct kobj_uevent_env *env) | |
2393 | { | |
2394 | return -ENODEV; | |
2395 | } | |
2396 | #endif /* CONFIG_HOTPLUG */ | |
2397 | ||
57b5ce07 LR |
2398 | void wiphy_regulatory_register(struct wiphy *wiphy) |
2399 | { | |
2400 | assert_cfg80211_lock(); | |
2401 | ||
2402 | mutex_lock(®_mutex); | |
2403 | ||
2404 | if (!reg_dev_ignore_cell_hint(wiphy)) | |
2405 | reg_num_devs_support_basehint++; | |
2406 | ||
14cdf112 | 2407 | wiphy_update_regulatory(wiphy, NL80211_REGDOM_SET_BY_CORE); |
f8a1c774 | 2408 | |
14cdf112 | 2409 | mutex_unlock(®_mutex); |
57b5ce07 LR |
2410 | } |
2411 | ||
a1794390 | 2412 | /* Caller must hold cfg80211_mutex */ |
bfead080 | 2413 | void wiphy_regulatory_deregister(struct wiphy *wiphy) |
3f2355cb | 2414 | { |
0ad8acaf | 2415 | struct wiphy *request_wiphy = NULL; |
806a9e39 | 2416 | |
761cf7ec LR |
2417 | assert_cfg80211_lock(); |
2418 | ||
abc7381b LR |
2419 | mutex_lock(®_mutex); |
2420 | ||
57b5ce07 LR |
2421 | if (!reg_dev_ignore_cell_hint(wiphy)) |
2422 | reg_num_devs_support_basehint--; | |
2423 | ||
0ef9ccdd CW |
2424 | kfree(wiphy->regd); |
2425 | ||
0ad8acaf LR |
2426 | if (last_request) |
2427 | request_wiphy = wiphy_idx_to_wiphy(last_request->wiphy_idx); | |
806a9e39 | 2428 | |
0ef9ccdd | 2429 | if (!request_wiphy || request_wiphy != wiphy) |
abc7381b | 2430 | goto out; |
0ef9ccdd | 2431 | |
806a9e39 | 2432 | last_request->wiphy_idx = WIPHY_IDX_STALE; |
3f2355cb | 2433 | last_request->country_ie_env = ENVIRON_ANY; |
abc7381b LR |
2434 | out: |
2435 | mutex_unlock(®_mutex); | |
3f2355cb LR |
2436 | } |
2437 | ||
a90c7a31 LR |
2438 | static void reg_timeout_work(struct work_struct *work) |
2439 | { | |
2440 | REG_DBG_PRINT("Timeout while waiting for CRDA to reply, " | |
12c5ffb5 | 2441 | "restoring regulatory settings\n"); |
a90c7a31 LR |
2442 | restore_regulatory_settings(true); |
2443 | } | |
2444 | ||
2fcc9f73 | 2445 | int __init regulatory_init(void) |
b2e1b302 | 2446 | { |
bcf4f99b | 2447 | int err = 0; |
734366de | 2448 | |
b2e1b302 LR |
2449 | reg_pdev = platform_device_register_simple("regulatory", 0, NULL, 0); |
2450 | if (IS_ERR(reg_pdev)) | |
2451 | return PTR_ERR(reg_pdev); | |
734366de | 2452 | |
4d9d88d1 SJR |
2453 | reg_pdev->dev.type = ®_device_type; |
2454 | ||
fe33eb39 | 2455 | spin_lock_init(®_requests_lock); |
e38f8a7a | 2456 | spin_lock_init(®_pending_beacons_lock); |
fe33eb39 | 2457 | |
80007efe LR |
2458 | reg_regdb_size_check(); |
2459 | ||
a3d2eaf0 | 2460 | cfg80211_regdomain = cfg80211_world_regdom; |
734366de | 2461 | |
09d989d1 LR |
2462 | user_alpha2[0] = '9'; |
2463 | user_alpha2[1] = '7'; | |
2464 | ||
ae9e4b0d LR |
2465 | /* We always try to get an update for the static regdomain */ |
2466 | err = regulatory_hint_core(cfg80211_regdomain->alpha2); | |
ba25c141 | 2467 | if (err) { |
bcf4f99b LR |
2468 | if (err == -ENOMEM) |
2469 | return err; | |
2470 | /* | |
2471 | * N.B. kobject_uevent_env() can fail mainly for when we're out | |
2472 | * memory which is handled and propagated appropriately above | |
2473 | * but it can also fail during a netlink_broadcast() or during | |
2474 | * early boot for call_usermodehelper(). For now treat these | |
2475 | * errors as non-fatal. | |
2476 | */ | |
e9c0268f | 2477 | pr_err("kobject_uevent_env() was unable to call CRDA during init\n"); |
bcf4f99b LR |
2478 | #ifdef CONFIG_CFG80211_REG_DEBUG |
2479 | /* We want to find out exactly why when debugging */ | |
2480 | WARN_ON(err); | |
734366de | 2481 | #endif |
bcf4f99b | 2482 | } |
734366de | 2483 | |
ae9e4b0d LR |
2484 | /* |
2485 | * Finally, if the user set the module parameter treat it | |
2486 | * as a user hint. | |
2487 | */ | |
2488 | if (!is_world_regdom(ieee80211_regdom)) | |
57b5ce07 LR |
2489 | regulatory_hint_user(ieee80211_regdom, |
2490 | NL80211_USER_REG_HINT_USER); | |
ae9e4b0d | 2491 | |
b2e1b302 LR |
2492 | return 0; |
2493 | } | |
2494 | ||
2fcc9f73 | 2495 | void /* __init_or_exit */ regulatory_exit(void) |
b2e1b302 | 2496 | { |
fe33eb39 | 2497 | struct regulatory_request *reg_request, *tmp; |
e38f8a7a | 2498 | struct reg_beacon *reg_beacon, *btmp; |
fe33eb39 LR |
2499 | |
2500 | cancel_work_sync(®_work); | |
a90c7a31 | 2501 | cancel_delayed_work_sync(®_timeout); |
fe33eb39 | 2502 | |
a1794390 | 2503 | mutex_lock(&cfg80211_mutex); |
abc7381b | 2504 | mutex_lock(®_mutex); |
734366de | 2505 | |
a042994d | 2506 | reset_regdomains(true); |
734366de | 2507 | |
58ebacc6 | 2508 | dev_set_uevent_suppress(®_pdev->dev, true); |
f6037d09 | 2509 | |
b2e1b302 | 2510 | platform_device_unregister(reg_pdev); |
734366de | 2511 | |
e38f8a7a LR |
2512 | spin_lock_bh(®_pending_beacons_lock); |
2513 | if (!list_empty(®_pending_beacons)) { | |
2514 | list_for_each_entry_safe(reg_beacon, btmp, | |
2515 | ®_pending_beacons, list) { | |
2516 | list_del(®_beacon->list); | |
2517 | kfree(reg_beacon); | |
2518 | } | |
2519 | } | |
2520 | spin_unlock_bh(®_pending_beacons_lock); | |
2521 | ||
2522 | if (!list_empty(®_beacon_list)) { | |
2523 | list_for_each_entry_safe(reg_beacon, btmp, | |
2524 | ®_beacon_list, list) { | |
2525 | list_del(®_beacon->list); | |
2526 | kfree(reg_beacon); | |
2527 | } | |
2528 | } | |
2529 | ||
fe33eb39 LR |
2530 | spin_lock(®_requests_lock); |
2531 | if (!list_empty(®_requests_list)) { | |
2532 | list_for_each_entry_safe(reg_request, tmp, | |
2533 | ®_requests_list, list) { | |
2534 | list_del(®_request->list); | |
2535 | kfree(reg_request); | |
2536 | } | |
2537 | } | |
2538 | spin_unlock(®_requests_lock); | |
2539 | ||
abc7381b | 2540 | mutex_unlock(®_mutex); |
a1794390 | 2541 | mutex_unlock(&cfg80211_mutex); |
8318d78a | 2542 | } |