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