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Commit | Line | Data |
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8318d78a JB |
1 | /* |
2 | * Copyright 2002-2005, Instant802 Networks, Inc. | |
3 | * Copyright 2005-2006, Devicescape Software, Inc. | |
4 | * Copyright 2007 Johannes Berg <johannes@sipsolutions.net> | |
3b77d5ec | 5 | * Copyright 2008-2011 Luis R. Rodriguez <mcgrof@qca.qualcomm.com> |
8318d78a | 6 | * |
3b77d5ec LR |
7 | * Permission to use, copy, modify, and/or distribute this software for any |
8 | * purpose with or without fee is hereby granted, provided that the above | |
9 | * copyright notice and this permission notice appear in all copies. | |
10 | * | |
11 | * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES | |
12 | * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF | |
13 | * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR | |
14 | * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES | |
15 | * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN | |
16 | * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF | |
17 | * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. | |
8318d78a JB |
18 | */ |
19 | ||
3b77d5ec | 20 | |
b2e1b302 LR |
21 | /** |
22 | * DOC: Wireless regulatory infrastructure | |
8318d78a JB |
23 | * |
24 | * The usual implementation is for a driver to read a device EEPROM to | |
25 | * determine which regulatory domain it should be operating under, then | |
26 | * looking up the allowable channels in a driver-local table and finally | |
27 | * registering those channels in the wiphy structure. | |
28 | * | |
b2e1b302 LR |
29 | * Another set of compliance enforcement is for drivers to use their |
30 | * own compliance limits which can be stored on the EEPROM. The host | |
31 | * driver or firmware may ensure these are used. | |
32 | * | |
33 | * In addition to all this we provide an extra layer of regulatory | |
34 | * conformance. For drivers which do not have any regulatory | |
35 | * information CRDA provides the complete regulatory solution. | |
36 | * For others it provides a community effort on further restrictions | |
37 | * to enhance compliance. | |
38 | * | |
39 | * Note: When number of rules --> infinity we will not be able to | |
40 | * index on alpha2 any more, instead we'll probably have to | |
41 | * rely on some SHA1 checksum of the regdomain for example. | |
42 | * | |
8318d78a | 43 | */ |
e9c0268f JP |
44 | |
45 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt | |
46 | ||
8318d78a | 47 | #include <linux/kernel.h> |
bc3b2d7f | 48 | #include <linux/export.h> |
5a0e3ad6 | 49 | #include <linux/slab.h> |
b2e1b302 | 50 | #include <linux/list.h> |
c61029c7 | 51 | #include <linux/ctype.h> |
b2e1b302 LR |
52 | #include <linux/nl80211.h> |
53 | #include <linux/platform_device.h> | |
d9b93842 | 54 | #include <linux/moduleparam.h> |
b2e1b302 | 55 | #include <net/cfg80211.h> |
8318d78a | 56 | #include "core.h" |
b2e1b302 | 57 | #include "reg.h" |
3b377ea9 | 58 | #include "regdb.h" |
73d54c9e | 59 | #include "nl80211.h" |
8318d78a | 60 | |
4113f751 | 61 | #ifdef CONFIG_CFG80211_REG_DEBUG |
12c5ffb5 JP |
62 | #define REG_DBG_PRINT(format, args...) \ |
63 | printk(KERN_DEBUG pr_fmt(format), ##args) | |
4113f751 | 64 | #else |
8271195e | 65 | #define REG_DBG_PRINT(args...) |
4113f751 LR |
66 | #endif |
67 | ||
2f92212b JB |
68 | enum reg_request_treatment { |
69 | REG_REQ_OK, | |
70 | REG_REQ_IGNORE, | |
71 | REG_REQ_INTERSECT, | |
72 | REG_REQ_ALREADY_SET, | |
73 | }; | |
74 | ||
a042994d LR |
75 | static struct regulatory_request core_request_world = { |
76 | .initiator = NL80211_REGDOM_SET_BY_CORE, | |
77 | .alpha2[0] = '0', | |
78 | .alpha2[1] = '0', | |
79 | .intersect = false, | |
80 | .processed = true, | |
81 | .country_ie_env = ENVIRON_ANY, | |
82 | }; | |
83 | ||
38fd2143 JB |
84 | /* |
85 | * Receipt of information from last regulatory request, | |
86 | * protected by RTNL (and can be accessed with RCU protection) | |
87 | */ | |
c492db37 JB |
88 | static struct regulatory_request __rcu *last_request = |
89 | (void __rcu *)&core_request_world; | |
734366de | 90 | |
b2e1b302 LR |
91 | /* To trigger userspace events */ |
92 | static struct platform_device *reg_pdev; | |
8318d78a | 93 | |
4d9d88d1 SJR |
94 | static struct device_type reg_device_type = { |
95 | .uevent = reg_device_uevent, | |
96 | }; | |
97 | ||
fb1fc7ad LR |
98 | /* |
99 | * Central wireless core regulatory domains, we only need two, | |
734366de | 100 | * the current one and a world regulatory domain in case we have no |
e8da2bb4 | 101 | * information to give us an alpha2. |
38fd2143 | 102 | * (protected by RTNL, can be read under RCU) |
fb1fc7ad | 103 | */ |
458f4f9e | 104 | const struct ieee80211_regdomain __rcu *cfg80211_regdomain; |
734366de | 105 | |
57b5ce07 LR |
106 | /* |
107 | * Number of devices that registered to the core | |
108 | * that support cellular base station regulatory hints | |
38fd2143 | 109 | * (protected by RTNL) |
57b5ce07 LR |
110 | */ |
111 | static int reg_num_devs_support_basehint; | |
112 | ||
458f4f9e JB |
113 | static const struct ieee80211_regdomain *get_cfg80211_regdom(void) |
114 | { | |
38fd2143 | 115 | return rtnl_dereference(cfg80211_regdomain); |
458f4f9e JB |
116 | } |
117 | ||
118 | static const struct ieee80211_regdomain *get_wiphy_regdom(struct wiphy *wiphy) | |
119 | { | |
38fd2143 | 120 | return rtnl_dereference(wiphy->regd); |
458f4f9e JB |
121 | } |
122 | ||
123 | static void rcu_free_regdom(const struct ieee80211_regdomain *r) | |
124 | { | |
125 | if (!r) | |
126 | return; | |
127 | kfree_rcu((struct ieee80211_regdomain *)r, rcu_head); | |
128 | } | |
129 | ||
c492db37 JB |
130 | static struct regulatory_request *get_last_request(void) |
131 | { | |
38fd2143 | 132 | return rcu_dereference_rtnl(last_request); |
c492db37 JB |
133 | } |
134 | ||
e38f8a7a | 135 | /* Used to queue up regulatory hints */ |
fe33eb39 LR |
136 | static LIST_HEAD(reg_requests_list); |
137 | static spinlock_t reg_requests_lock; | |
138 | ||
e38f8a7a LR |
139 | /* Used to queue up beacon hints for review */ |
140 | static LIST_HEAD(reg_pending_beacons); | |
141 | static spinlock_t reg_pending_beacons_lock; | |
142 | ||
143 | /* Used to keep track of processed beacon hints */ | |
144 | static LIST_HEAD(reg_beacon_list); | |
145 | ||
146 | struct reg_beacon { | |
147 | struct list_head list; | |
148 | struct ieee80211_channel chan; | |
149 | }; | |
150 | ||
f333a7a2 LR |
151 | static void reg_todo(struct work_struct *work); |
152 | static DECLARE_WORK(reg_work, reg_todo); | |
153 | ||
a90c7a31 LR |
154 | static void reg_timeout_work(struct work_struct *work); |
155 | static DECLARE_DELAYED_WORK(reg_timeout, reg_timeout_work); | |
156 | ||
734366de JB |
157 | /* We keep a static world regulatory domain in case of the absence of CRDA */ |
158 | static const struct ieee80211_regdomain world_regdom = { | |
90cdc6df | 159 | .n_reg_rules = 6, |
734366de JB |
160 | .alpha2 = "00", |
161 | .reg_rules = { | |
68798a62 LR |
162 | /* IEEE 802.11b/g, channels 1..11 */ |
163 | REG_RULE(2412-10, 2462+10, 40, 6, 20, 0), | |
43c771a1 JB |
164 | /* IEEE 802.11b/g, channels 12..13. */ |
165 | REG_RULE(2467-10, 2472+10, 40, 6, 20, | |
3fc71f77 LR |
166 | NL80211_RRF_PASSIVE_SCAN | |
167 | NL80211_RRF_NO_IBSS), | |
611b6a82 LR |
168 | /* IEEE 802.11 channel 14 - Only JP enables |
169 | * this and for 802.11b only */ | |
170 | REG_RULE(2484-10, 2484+10, 20, 6, 20, | |
171 | NL80211_RRF_PASSIVE_SCAN | | |
172 | NL80211_RRF_NO_IBSS | | |
173 | NL80211_RRF_NO_OFDM), | |
174 | /* IEEE 802.11a, channel 36..48 */ | |
8ab9d85c | 175 | REG_RULE(5180-10, 5240+10, 80, 6, 20, |
611b6a82 LR |
176 | NL80211_RRF_PASSIVE_SCAN | |
177 | NL80211_RRF_NO_IBSS), | |
3fc71f77 | 178 | |
8ab9d85c | 179 | /* NB: 5260 MHz - 5700 MHz requires DFS */ |
3fc71f77 LR |
180 | |
181 | /* IEEE 802.11a, channel 149..165 */ | |
8ab9d85c | 182 | REG_RULE(5745-10, 5825+10, 80, 6, 20, |
3fc71f77 LR |
183 | NL80211_RRF_PASSIVE_SCAN | |
184 | NL80211_RRF_NO_IBSS), | |
90cdc6df VK |
185 | |
186 | /* IEEE 802.11ad (60gHz), channels 1..3 */ | |
187 | REG_RULE(56160+2160*1-1080, 56160+2160*3+1080, 2160, 0, 0, 0), | |
734366de JB |
188 | } |
189 | }; | |
190 | ||
38fd2143 | 191 | /* protected by RTNL */ |
a3d2eaf0 JB |
192 | static const struct ieee80211_regdomain *cfg80211_world_regdom = |
193 | &world_regdom; | |
734366de | 194 | |
6ee7d330 | 195 | static char *ieee80211_regdom = "00"; |
09d989d1 | 196 | static char user_alpha2[2]; |
6ee7d330 | 197 | |
734366de JB |
198 | module_param(ieee80211_regdom, charp, 0444); |
199 | MODULE_PARM_DESC(ieee80211_regdom, "IEEE 802.11 regulatory domain code"); | |
200 | ||
379b82f4 JB |
201 | static void reset_regdomains(bool full_reset, |
202 | const struct ieee80211_regdomain *new_regdom) | |
734366de | 203 | { |
458f4f9e | 204 | const struct ieee80211_regdomain *r; |
c492db37 | 205 | struct regulatory_request *lr; |
458f4f9e | 206 | |
38fd2143 | 207 | ASSERT_RTNL(); |
e8da2bb4 | 208 | |
458f4f9e JB |
209 | r = get_cfg80211_regdom(); |
210 | ||
942b25cf | 211 | /* avoid freeing static information or freeing something twice */ |
458f4f9e JB |
212 | if (r == cfg80211_world_regdom) |
213 | r = NULL; | |
942b25cf JB |
214 | if (cfg80211_world_regdom == &world_regdom) |
215 | cfg80211_world_regdom = NULL; | |
458f4f9e JB |
216 | if (r == &world_regdom) |
217 | r = NULL; | |
942b25cf | 218 | |
458f4f9e JB |
219 | rcu_free_regdom(r); |
220 | rcu_free_regdom(cfg80211_world_regdom); | |
734366de | 221 | |
a3d2eaf0 | 222 | cfg80211_world_regdom = &world_regdom; |
458f4f9e | 223 | rcu_assign_pointer(cfg80211_regdomain, new_regdom); |
a042994d LR |
224 | |
225 | if (!full_reset) | |
226 | return; | |
227 | ||
c492db37 JB |
228 | lr = get_last_request(); |
229 | if (lr != &core_request_world && lr) | |
230 | kfree_rcu(lr, rcu_head); | |
231 | rcu_assign_pointer(last_request, &core_request_world); | |
734366de JB |
232 | } |
233 | ||
fb1fc7ad LR |
234 | /* |
235 | * Dynamic world regulatory domain requested by the wireless | |
236 | * core upon initialization | |
237 | */ | |
a3d2eaf0 | 238 | static void update_world_regdomain(const struct ieee80211_regdomain *rd) |
734366de | 239 | { |
c492db37 | 240 | struct regulatory_request *lr; |
734366de | 241 | |
c492db37 JB |
242 | lr = get_last_request(); |
243 | ||
244 | WARN_ON(!lr); | |
734366de | 245 | |
379b82f4 | 246 | reset_regdomains(false, rd); |
734366de JB |
247 | |
248 | cfg80211_world_regdom = rd; | |
734366de | 249 | } |
734366de | 250 | |
a3d2eaf0 | 251 | bool is_world_regdom(const char *alpha2) |
b2e1b302 LR |
252 | { |
253 | if (!alpha2) | |
254 | return false; | |
1a919318 | 255 | return alpha2[0] == '0' && alpha2[1] == '0'; |
b2e1b302 | 256 | } |
8318d78a | 257 | |
a3d2eaf0 | 258 | static bool is_alpha2_set(const char *alpha2) |
b2e1b302 LR |
259 | { |
260 | if (!alpha2) | |
261 | return false; | |
1a919318 | 262 | return alpha2[0] && alpha2[1]; |
b2e1b302 | 263 | } |
8318d78a | 264 | |
a3d2eaf0 | 265 | static bool is_unknown_alpha2(const char *alpha2) |
b2e1b302 LR |
266 | { |
267 | if (!alpha2) | |
268 | return false; | |
fb1fc7ad LR |
269 | /* |
270 | * Special case where regulatory domain was built by driver | |
271 | * but a specific alpha2 cannot be determined | |
272 | */ | |
1a919318 | 273 | return alpha2[0] == '9' && alpha2[1] == '9'; |
b2e1b302 | 274 | } |
8318d78a | 275 | |
3f2355cb LR |
276 | static bool is_intersected_alpha2(const char *alpha2) |
277 | { | |
278 | if (!alpha2) | |
279 | return false; | |
fb1fc7ad LR |
280 | /* |
281 | * Special case where regulatory domain is the | |
3f2355cb | 282 | * result of an intersection between two regulatory domain |
fb1fc7ad LR |
283 | * structures |
284 | */ | |
1a919318 | 285 | return alpha2[0] == '9' && alpha2[1] == '8'; |
3f2355cb LR |
286 | } |
287 | ||
a3d2eaf0 | 288 | static bool is_an_alpha2(const char *alpha2) |
b2e1b302 LR |
289 | { |
290 | if (!alpha2) | |
291 | return false; | |
1a919318 | 292 | return isalpha(alpha2[0]) && isalpha(alpha2[1]); |
b2e1b302 | 293 | } |
8318d78a | 294 | |
a3d2eaf0 | 295 | static bool alpha2_equal(const char *alpha2_x, const char *alpha2_y) |
b2e1b302 LR |
296 | { |
297 | if (!alpha2_x || !alpha2_y) | |
298 | return false; | |
1a919318 | 299 | return alpha2_x[0] == alpha2_y[0] && alpha2_x[1] == alpha2_y[1]; |
b2e1b302 LR |
300 | } |
301 | ||
69b1572b | 302 | static bool regdom_changes(const char *alpha2) |
b2e1b302 | 303 | { |
458f4f9e | 304 | const struct ieee80211_regdomain *r = get_cfg80211_regdom(); |
761cf7ec | 305 | |
458f4f9e | 306 | if (!r) |
b2e1b302 | 307 | return true; |
458f4f9e | 308 | return !alpha2_equal(r->alpha2, alpha2); |
b2e1b302 LR |
309 | } |
310 | ||
09d989d1 LR |
311 | /* |
312 | * The NL80211_REGDOM_SET_BY_USER regdom alpha2 is cached, this lets | |
313 | * you know if a valid regulatory hint with NL80211_REGDOM_SET_BY_USER | |
314 | * has ever been issued. | |
315 | */ | |
316 | static bool is_user_regdom_saved(void) | |
317 | { | |
318 | if (user_alpha2[0] == '9' && user_alpha2[1] == '7') | |
319 | return false; | |
320 | ||
321 | /* This would indicate a mistake on the design */ | |
1a919318 | 322 | if (WARN(!is_world_regdom(user_alpha2) && !is_an_alpha2(user_alpha2), |
09d989d1 | 323 | "Unexpected user alpha2: %c%c\n", |
1a919318 | 324 | user_alpha2[0], user_alpha2[1])) |
09d989d1 LR |
325 | return false; |
326 | ||
327 | return true; | |
328 | } | |
329 | ||
e9763c3c JB |
330 | static const struct ieee80211_regdomain * |
331 | reg_copy_regd(const struct ieee80211_regdomain *src_regd) | |
3b377ea9 JL |
332 | { |
333 | struct ieee80211_regdomain *regd; | |
e9763c3c | 334 | int size_of_regd; |
3b377ea9 JL |
335 | unsigned int i; |
336 | ||
82f20856 JB |
337 | size_of_regd = |
338 | sizeof(struct ieee80211_regdomain) + | |
339 | src_regd->n_reg_rules * sizeof(struct ieee80211_reg_rule); | |
3b377ea9 JL |
340 | |
341 | regd = kzalloc(size_of_regd, GFP_KERNEL); | |
342 | if (!regd) | |
e9763c3c | 343 | return ERR_PTR(-ENOMEM); |
3b377ea9 JL |
344 | |
345 | memcpy(regd, src_regd, sizeof(struct ieee80211_regdomain)); | |
346 | ||
347 | for (i = 0; i < src_regd->n_reg_rules; i++) | |
348 | memcpy(®d->reg_rules[i], &src_regd->reg_rules[i], | |
e9763c3c | 349 | sizeof(struct ieee80211_reg_rule)); |
3b377ea9 | 350 | |
e9763c3c | 351 | return regd; |
3b377ea9 JL |
352 | } |
353 | ||
354 | #ifdef CONFIG_CFG80211_INTERNAL_REGDB | |
355 | struct reg_regdb_search_request { | |
356 | char alpha2[2]; | |
357 | struct list_head list; | |
358 | }; | |
359 | ||
360 | static LIST_HEAD(reg_regdb_search_list); | |
368d06f5 | 361 | static DEFINE_MUTEX(reg_regdb_search_mutex); |
3b377ea9 JL |
362 | |
363 | static void reg_regdb_search(struct work_struct *work) | |
364 | { | |
365 | struct reg_regdb_search_request *request; | |
e9763c3c JB |
366 | const struct ieee80211_regdomain *curdom, *regdom = NULL; |
367 | int i; | |
a85d0d7f | 368 | |
5fe231e8 | 369 | rtnl_lock(); |
3b377ea9 | 370 | |
368d06f5 | 371 | mutex_lock(®_regdb_search_mutex); |
3b377ea9 JL |
372 | while (!list_empty(®_regdb_search_list)) { |
373 | request = list_first_entry(®_regdb_search_list, | |
374 | struct reg_regdb_search_request, | |
375 | list); | |
376 | list_del(&request->list); | |
377 | ||
1a919318 | 378 | for (i = 0; i < reg_regdb_size; i++) { |
3b377ea9 JL |
379 | curdom = reg_regdb[i]; |
380 | ||
1a919318 | 381 | if (alpha2_equal(request->alpha2, curdom->alpha2)) { |
e9763c3c | 382 | regdom = reg_copy_regd(curdom); |
3b377ea9 JL |
383 | break; |
384 | } | |
385 | } | |
386 | ||
387 | kfree(request); | |
388 | } | |
368d06f5 | 389 | mutex_unlock(®_regdb_search_mutex); |
a85d0d7f | 390 | |
e9763c3c | 391 | if (!IS_ERR_OR_NULL(regdom)) |
a85d0d7f LR |
392 | set_regdom(regdom); |
393 | ||
5fe231e8 | 394 | rtnl_unlock(); |
3b377ea9 JL |
395 | } |
396 | ||
397 | static DECLARE_WORK(reg_regdb_work, reg_regdb_search); | |
398 | ||
399 | static void reg_regdb_query(const char *alpha2) | |
400 | { | |
401 | struct reg_regdb_search_request *request; | |
402 | ||
403 | if (!alpha2) | |
404 | return; | |
405 | ||
406 | request = kzalloc(sizeof(struct reg_regdb_search_request), GFP_KERNEL); | |
407 | if (!request) | |
408 | return; | |
409 | ||
410 | memcpy(request->alpha2, alpha2, 2); | |
411 | ||
368d06f5 | 412 | mutex_lock(®_regdb_search_mutex); |
3b377ea9 | 413 | list_add_tail(&request->list, ®_regdb_search_list); |
368d06f5 | 414 | mutex_unlock(®_regdb_search_mutex); |
3b377ea9 JL |
415 | |
416 | schedule_work(®_regdb_work); | |
417 | } | |
80007efe LR |
418 | |
419 | /* Feel free to add any other sanity checks here */ | |
420 | static void reg_regdb_size_check(void) | |
421 | { | |
422 | /* We should ideally BUILD_BUG_ON() but then random builds would fail */ | |
423 | WARN_ONCE(!reg_regdb_size, "db.txt is empty, you should update it..."); | |
424 | } | |
3b377ea9 | 425 | #else |
80007efe | 426 | static inline void reg_regdb_size_check(void) {} |
3b377ea9 JL |
427 | static inline void reg_regdb_query(const char *alpha2) {} |
428 | #endif /* CONFIG_CFG80211_INTERNAL_REGDB */ | |
429 | ||
fb1fc7ad LR |
430 | /* |
431 | * This lets us keep regulatory code which is updated on a regulatory | |
4d9d88d1 SJR |
432 | * basis in userspace. Country information is filled in by |
433 | * reg_device_uevent | |
fb1fc7ad | 434 | */ |
b2e1b302 LR |
435 | static int call_crda(const char *alpha2) |
436 | { | |
b2e1b302 | 437 | if (!is_world_regdom((char *) alpha2)) |
e9c0268f | 438 | pr_info("Calling CRDA for country: %c%c\n", |
b2e1b302 LR |
439 | alpha2[0], alpha2[1]); |
440 | else | |
e9c0268f | 441 | pr_info("Calling CRDA to update world regulatory domain\n"); |
b2e1b302 | 442 | |
3b377ea9 JL |
443 | /* query internal regulatory database (if it exists) */ |
444 | reg_regdb_query(alpha2); | |
445 | ||
4d9d88d1 | 446 | return kobject_uevent(®_pdev->dev.kobj, KOBJ_CHANGE); |
b2e1b302 LR |
447 | } |
448 | ||
6913b49a | 449 | static bool reg_is_valid_request(const char *alpha2) |
b2e1b302 | 450 | { |
c492db37 | 451 | struct regulatory_request *lr = get_last_request(); |
61405e97 | 452 | |
c492db37 | 453 | if (!lr || lr->processed) |
f6037d09 JB |
454 | return false; |
455 | ||
c492db37 | 456 | return alpha2_equal(lr->alpha2, alpha2); |
b2e1b302 | 457 | } |
8318d78a | 458 | |
b2e1b302 | 459 | /* Sanity check on a regulatory rule */ |
a3d2eaf0 | 460 | static bool is_valid_reg_rule(const struct ieee80211_reg_rule *rule) |
8318d78a | 461 | { |
a3d2eaf0 | 462 | const struct ieee80211_freq_range *freq_range = &rule->freq_range; |
b2e1b302 LR |
463 | u32 freq_diff; |
464 | ||
91e99004 | 465 | if (freq_range->start_freq_khz <= 0 || freq_range->end_freq_khz <= 0) |
b2e1b302 LR |
466 | return false; |
467 | ||
468 | if (freq_range->start_freq_khz > freq_range->end_freq_khz) | |
469 | return false; | |
470 | ||
471 | freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz; | |
472 | ||
bd05f28e | 473 | if (freq_range->end_freq_khz <= freq_range->start_freq_khz || |
1a919318 | 474 | freq_range->max_bandwidth_khz > freq_diff) |
b2e1b302 LR |
475 | return false; |
476 | ||
477 | return true; | |
478 | } | |
479 | ||
a3d2eaf0 | 480 | static bool is_valid_rd(const struct ieee80211_regdomain *rd) |
b2e1b302 | 481 | { |
a3d2eaf0 | 482 | const struct ieee80211_reg_rule *reg_rule = NULL; |
b2e1b302 | 483 | unsigned int i; |
8318d78a | 484 | |
b2e1b302 LR |
485 | if (!rd->n_reg_rules) |
486 | return false; | |
8318d78a | 487 | |
88dc1c3f LR |
488 | if (WARN_ON(rd->n_reg_rules > NL80211_MAX_SUPP_REG_RULES)) |
489 | return false; | |
490 | ||
b2e1b302 LR |
491 | for (i = 0; i < rd->n_reg_rules; i++) { |
492 | reg_rule = &rd->reg_rules[i]; | |
493 | if (!is_valid_reg_rule(reg_rule)) | |
494 | return false; | |
495 | } | |
496 | ||
497 | return true; | |
8318d78a JB |
498 | } |
499 | ||
038659e7 | 500 | static bool reg_does_bw_fit(const struct ieee80211_freq_range *freq_range, |
fe7ef5e9 | 501 | u32 center_freq_khz, u32 bw_khz) |
b2e1b302 | 502 | { |
038659e7 LR |
503 | u32 start_freq_khz, end_freq_khz; |
504 | ||
505 | start_freq_khz = center_freq_khz - (bw_khz/2); | |
506 | end_freq_khz = center_freq_khz + (bw_khz/2); | |
507 | ||
508 | if (start_freq_khz >= freq_range->start_freq_khz && | |
509 | end_freq_khz <= freq_range->end_freq_khz) | |
510 | return true; | |
511 | ||
512 | return false; | |
b2e1b302 | 513 | } |
8318d78a | 514 | |
0c7dc45d LR |
515 | /** |
516 | * freq_in_rule_band - tells us if a frequency is in a frequency band | |
517 | * @freq_range: frequency rule we want to query | |
518 | * @freq_khz: frequency we are inquiring about | |
519 | * | |
520 | * This lets us know if a specific frequency rule is or is not relevant to | |
521 | * a specific frequency's band. Bands are device specific and artificial | |
64629b9d VK |
522 | * definitions (the "2.4 GHz band", the "5 GHz band" and the "60GHz band"), |
523 | * however it is safe for now to assume that a frequency rule should not be | |
524 | * part of a frequency's band if the start freq or end freq are off by more | |
525 | * than 2 GHz for the 2.4 and 5 GHz bands, and by more than 10 GHz for the | |
526 | * 60 GHz band. | |
0c7dc45d LR |
527 | * This resolution can be lowered and should be considered as we add |
528 | * regulatory rule support for other "bands". | |
529 | **/ | |
530 | static bool freq_in_rule_band(const struct ieee80211_freq_range *freq_range, | |
1a919318 | 531 | u32 freq_khz) |
0c7dc45d LR |
532 | { |
533 | #define ONE_GHZ_IN_KHZ 1000000 | |
64629b9d VK |
534 | /* |
535 | * From 802.11ad: directional multi-gigabit (DMG): | |
536 | * Pertaining to operation in a frequency band containing a channel | |
537 | * with the Channel starting frequency above 45 GHz. | |
538 | */ | |
539 | u32 limit = freq_khz > 45 * ONE_GHZ_IN_KHZ ? | |
540 | 10 * ONE_GHZ_IN_KHZ : 2 * ONE_GHZ_IN_KHZ; | |
541 | if (abs(freq_khz - freq_range->start_freq_khz) <= limit) | |
0c7dc45d | 542 | return true; |
64629b9d | 543 | if (abs(freq_khz - freq_range->end_freq_khz) <= limit) |
0c7dc45d LR |
544 | return true; |
545 | return false; | |
546 | #undef ONE_GHZ_IN_KHZ | |
547 | } | |
548 | ||
fb1fc7ad LR |
549 | /* |
550 | * Helper for regdom_intersect(), this does the real | |
551 | * mathematical intersection fun | |
552 | */ | |
1a919318 JB |
553 | static int reg_rules_intersect(const struct ieee80211_reg_rule *rule1, |
554 | const struct ieee80211_reg_rule *rule2, | |
555 | struct ieee80211_reg_rule *intersected_rule) | |
9c96477d LR |
556 | { |
557 | const struct ieee80211_freq_range *freq_range1, *freq_range2; | |
558 | struct ieee80211_freq_range *freq_range; | |
559 | const struct ieee80211_power_rule *power_rule1, *power_rule2; | |
560 | struct ieee80211_power_rule *power_rule; | |
561 | u32 freq_diff; | |
562 | ||
563 | freq_range1 = &rule1->freq_range; | |
564 | freq_range2 = &rule2->freq_range; | |
565 | freq_range = &intersected_rule->freq_range; | |
566 | ||
567 | power_rule1 = &rule1->power_rule; | |
568 | power_rule2 = &rule2->power_rule; | |
569 | power_rule = &intersected_rule->power_rule; | |
570 | ||
571 | freq_range->start_freq_khz = max(freq_range1->start_freq_khz, | |
1a919318 | 572 | freq_range2->start_freq_khz); |
9c96477d | 573 | freq_range->end_freq_khz = min(freq_range1->end_freq_khz, |
1a919318 | 574 | freq_range2->end_freq_khz); |
9c96477d | 575 | freq_range->max_bandwidth_khz = min(freq_range1->max_bandwidth_khz, |
1a919318 | 576 | freq_range2->max_bandwidth_khz); |
9c96477d LR |
577 | |
578 | freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz; | |
579 | if (freq_range->max_bandwidth_khz > freq_diff) | |
580 | freq_range->max_bandwidth_khz = freq_diff; | |
581 | ||
582 | power_rule->max_eirp = min(power_rule1->max_eirp, | |
583 | power_rule2->max_eirp); | |
584 | power_rule->max_antenna_gain = min(power_rule1->max_antenna_gain, | |
585 | power_rule2->max_antenna_gain); | |
586 | ||
1a919318 | 587 | intersected_rule->flags = rule1->flags | rule2->flags; |
9c96477d LR |
588 | |
589 | if (!is_valid_reg_rule(intersected_rule)) | |
590 | return -EINVAL; | |
591 | ||
592 | return 0; | |
593 | } | |
594 | ||
595 | /** | |
596 | * regdom_intersect - do the intersection between two regulatory domains | |
597 | * @rd1: first regulatory domain | |
598 | * @rd2: second regulatory domain | |
599 | * | |
600 | * Use this function to get the intersection between two regulatory domains. | |
601 | * Once completed we will mark the alpha2 for the rd as intersected, "98", | |
602 | * as no one single alpha2 can represent this regulatory domain. | |
603 | * | |
604 | * Returns a pointer to the regulatory domain structure which will hold the | |
605 | * resulting intersection of rules between rd1 and rd2. We will | |
606 | * kzalloc() this structure for you. | |
607 | */ | |
1a919318 JB |
608 | static struct ieee80211_regdomain * |
609 | regdom_intersect(const struct ieee80211_regdomain *rd1, | |
610 | const struct ieee80211_regdomain *rd2) | |
9c96477d LR |
611 | { |
612 | int r, size_of_regd; | |
613 | unsigned int x, y; | |
614 | unsigned int num_rules = 0, rule_idx = 0; | |
615 | const struct ieee80211_reg_rule *rule1, *rule2; | |
616 | struct ieee80211_reg_rule *intersected_rule; | |
617 | struct ieee80211_regdomain *rd; | |
618 | /* This is just a dummy holder to help us count */ | |
74f53cd8 | 619 | struct ieee80211_reg_rule dummy_rule; |
9c96477d LR |
620 | |
621 | if (!rd1 || !rd2) | |
622 | return NULL; | |
623 | ||
fb1fc7ad LR |
624 | /* |
625 | * First we get a count of the rules we'll need, then we actually | |
9c96477d LR |
626 | * build them. This is to so we can malloc() and free() a |
627 | * regdomain once. The reason we use reg_rules_intersect() here | |
628 | * is it will return -EINVAL if the rule computed makes no sense. | |
fb1fc7ad LR |
629 | * All rules that do check out OK are valid. |
630 | */ | |
9c96477d LR |
631 | |
632 | for (x = 0; x < rd1->n_reg_rules; x++) { | |
633 | rule1 = &rd1->reg_rules[x]; | |
634 | for (y = 0; y < rd2->n_reg_rules; y++) { | |
635 | rule2 = &rd2->reg_rules[y]; | |
74f53cd8 | 636 | if (!reg_rules_intersect(rule1, rule2, &dummy_rule)) |
9c96477d | 637 | num_rules++; |
9c96477d LR |
638 | } |
639 | } | |
640 | ||
641 | if (!num_rules) | |
642 | return NULL; | |
643 | ||
644 | size_of_regd = sizeof(struct ieee80211_regdomain) + | |
82f20856 | 645 | num_rules * sizeof(struct ieee80211_reg_rule); |
9c96477d LR |
646 | |
647 | rd = kzalloc(size_of_regd, GFP_KERNEL); | |
648 | if (!rd) | |
649 | return NULL; | |
650 | ||
8a57fff0 | 651 | for (x = 0; x < rd1->n_reg_rules && rule_idx < num_rules; x++) { |
9c96477d | 652 | rule1 = &rd1->reg_rules[x]; |
8a57fff0 | 653 | for (y = 0; y < rd2->n_reg_rules && rule_idx < num_rules; y++) { |
9c96477d | 654 | rule2 = &rd2->reg_rules[y]; |
fb1fc7ad LR |
655 | /* |
656 | * This time around instead of using the stack lets | |
9c96477d | 657 | * write to the target rule directly saving ourselves |
fb1fc7ad LR |
658 | * a memcpy() |
659 | */ | |
9c96477d | 660 | intersected_rule = &rd->reg_rules[rule_idx]; |
1a919318 | 661 | r = reg_rules_intersect(rule1, rule2, intersected_rule); |
fb1fc7ad LR |
662 | /* |
663 | * No need to memset here the intersected rule here as | |
664 | * we're not using the stack anymore | |
665 | */ | |
9c96477d LR |
666 | if (r) |
667 | continue; | |
668 | rule_idx++; | |
669 | } | |
670 | } | |
671 | ||
672 | if (rule_idx != num_rules) { | |
673 | kfree(rd); | |
674 | return NULL; | |
675 | } | |
676 | ||
677 | rd->n_reg_rules = num_rules; | |
678 | rd->alpha2[0] = '9'; | |
679 | rd->alpha2[1] = '8'; | |
680 | ||
681 | return rd; | |
682 | } | |
683 | ||
fb1fc7ad LR |
684 | /* |
685 | * XXX: add support for the rest of enum nl80211_reg_rule_flags, we may | |
686 | * want to just have the channel structure use these | |
687 | */ | |
b2e1b302 LR |
688 | static u32 map_regdom_flags(u32 rd_flags) |
689 | { | |
690 | u32 channel_flags = 0; | |
691 | if (rd_flags & NL80211_RRF_PASSIVE_SCAN) | |
692 | channel_flags |= IEEE80211_CHAN_PASSIVE_SCAN; | |
693 | if (rd_flags & NL80211_RRF_NO_IBSS) | |
694 | channel_flags |= IEEE80211_CHAN_NO_IBSS; | |
695 | if (rd_flags & NL80211_RRF_DFS) | |
696 | channel_flags |= IEEE80211_CHAN_RADAR; | |
03f6b084 SF |
697 | if (rd_flags & NL80211_RRF_NO_OFDM) |
698 | channel_flags |= IEEE80211_CHAN_NO_OFDM; | |
b2e1b302 LR |
699 | return channel_flags; |
700 | } | |
701 | ||
361c9c8b JB |
702 | static const struct ieee80211_reg_rule * |
703 | freq_reg_info_regd(struct wiphy *wiphy, u32 center_freq, | |
704 | const struct ieee80211_regdomain *regd) | |
8318d78a JB |
705 | { |
706 | int i; | |
0c7dc45d | 707 | bool band_rule_found = false; |
038659e7 LR |
708 | bool bw_fits = false; |
709 | ||
3e0c3ff3 | 710 | if (!regd) |
361c9c8b | 711 | return ERR_PTR(-EINVAL); |
b2e1b302 | 712 | |
3e0c3ff3 | 713 | for (i = 0; i < regd->n_reg_rules; i++) { |
b2e1b302 LR |
714 | const struct ieee80211_reg_rule *rr; |
715 | const struct ieee80211_freq_range *fr = NULL; | |
b2e1b302 | 716 | |
3e0c3ff3 | 717 | rr = ®d->reg_rules[i]; |
b2e1b302 | 718 | fr = &rr->freq_range; |
0c7dc45d | 719 | |
fb1fc7ad LR |
720 | /* |
721 | * We only need to know if one frequency rule was | |
0c7dc45d | 722 | * was in center_freq's band, that's enough, so lets |
fb1fc7ad LR |
723 | * not overwrite it once found |
724 | */ | |
0c7dc45d LR |
725 | if (!band_rule_found) |
726 | band_rule_found = freq_in_rule_band(fr, center_freq); | |
727 | ||
fe7ef5e9 | 728 | bw_fits = reg_does_bw_fit(fr, center_freq, MHZ_TO_KHZ(20)); |
0c7dc45d | 729 | |
361c9c8b JB |
730 | if (band_rule_found && bw_fits) |
731 | return rr; | |
8318d78a JB |
732 | } |
733 | ||
0c7dc45d | 734 | if (!band_rule_found) |
361c9c8b | 735 | return ERR_PTR(-ERANGE); |
0c7dc45d | 736 | |
361c9c8b | 737 | return ERR_PTR(-EINVAL); |
b2e1b302 LR |
738 | } |
739 | ||
361c9c8b JB |
740 | const struct ieee80211_reg_rule *freq_reg_info(struct wiphy *wiphy, |
741 | u32 center_freq) | |
1fa25e41 | 742 | { |
5d885b99 | 743 | const struct ieee80211_regdomain *regd; |
c492db37 | 744 | struct regulatory_request *lr = get_last_request(); |
1a919318 | 745 | |
5d885b99 JB |
746 | /* |
747 | * Follow the driver's regulatory domain, if present, unless a country | |
748 | * IE has been processed or a user wants to help complaince further | |
749 | */ | |
c492db37 JB |
750 | if (lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && |
751 | lr->initiator != NL80211_REGDOM_SET_BY_USER && | |
5d885b99 | 752 | wiphy->regd) |
458f4f9e | 753 | regd = get_wiphy_regdom(wiphy); |
5d885b99 | 754 | else |
458f4f9e | 755 | regd = get_cfg80211_regdom(); |
5d885b99 | 756 | |
361c9c8b | 757 | return freq_reg_info_regd(wiphy, center_freq, regd); |
1fa25e41 | 758 | } |
4f366c5d | 759 | EXPORT_SYMBOL(freq_reg_info); |
b2e1b302 | 760 | |
926a0a09 LR |
761 | #ifdef CONFIG_CFG80211_REG_DEBUG |
762 | static const char *reg_initiator_name(enum nl80211_reg_initiator initiator) | |
763 | { | |
764 | switch (initiator) { | |
765 | case NL80211_REGDOM_SET_BY_CORE: | |
766 | return "Set by core"; | |
767 | case NL80211_REGDOM_SET_BY_USER: | |
768 | return "Set by user"; | |
769 | case NL80211_REGDOM_SET_BY_DRIVER: | |
770 | return "Set by driver"; | |
771 | case NL80211_REGDOM_SET_BY_COUNTRY_IE: | |
772 | return "Set by country IE"; | |
773 | default: | |
774 | WARN_ON(1); | |
775 | return "Set by bug"; | |
776 | } | |
777 | } | |
e702d3cf LR |
778 | |
779 | static void chan_reg_rule_print_dbg(struct ieee80211_channel *chan, | |
e702d3cf LR |
780 | const struct ieee80211_reg_rule *reg_rule) |
781 | { | |
782 | const struct ieee80211_power_rule *power_rule; | |
783 | const struct ieee80211_freq_range *freq_range; | |
784 | char max_antenna_gain[32]; | |
785 | ||
786 | power_rule = ®_rule->power_rule; | |
787 | freq_range = ®_rule->freq_range; | |
788 | ||
789 | if (!power_rule->max_antenna_gain) | |
790 | snprintf(max_antenna_gain, 32, "N/A"); | |
791 | else | |
792 | snprintf(max_antenna_gain, 32, "%d", power_rule->max_antenna_gain); | |
793 | ||
fe7ef5e9 JB |
794 | REG_DBG_PRINT("Updating information on frequency %d MHz with regulatory rule:\n", |
795 | chan->center_freq); | |
e702d3cf | 796 | |
56e6786e | 797 | REG_DBG_PRINT("%d KHz - %d KHz @ %d KHz), (%s mBi, %d mBm)\n", |
1a919318 JB |
798 | freq_range->start_freq_khz, freq_range->end_freq_khz, |
799 | freq_range->max_bandwidth_khz, max_antenna_gain, | |
e702d3cf LR |
800 | power_rule->max_eirp); |
801 | } | |
802 | #else | |
803 | static void chan_reg_rule_print_dbg(struct ieee80211_channel *chan, | |
e702d3cf LR |
804 | const struct ieee80211_reg_rule *reg_rule) |
805 | { | |
806 | return; | |
807 | } | |
926a0a09 LR |
808 | #endif |
809 | ||
038659e7 LR |
810 | /* |
811 | * Note that right now we assume the desired channel bandwidth | |
812 | * is always 20 MHz for each individual channel (HT40 uses 20 MHz | |
fe7ef5e9 | 813 | * per channel, the primary and the extension channel). |
038659e7 | 814 | */ |
7ca43d03 LR |
815 | static void handle_channel(struct wiphy *wiphy, |
816 | enum nl80211_reg_initiator initiator, | |
fdc9d7b2 | 817 | struct ieee80211_channel *chan) |
b2e1b302 | 818 | { |
038659e7 | 819 | u32 flags, bw_flags = 0; |
b2e1b302 LR |
820 | const struct ieee80211_reg_rule *reg_rule = NULL; |
821 | const struct ieee80211_power_rule *power_rule = NULL; | |
038659e7 | 822 | const struct ieee80211_freq_range *freq_range = NULL; |
fe33eb39 | 823 | struct wiphy *request_wiphy = NULL; |
c492db37 | 824 | struct regulatory_request *lr = get_last_request(); |
a92a3ce7 | 825 | |
c492db37 | 826 | request_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx); |
a92a3ce7 LR |
827 | |
828 | flags = chan->orig_flags; | |
b2e1b302 | 829 | |
361c9c8b JB |
830 | reg_rule = freq_reg_info(wiphy, MHZ_TO_KHZ(chan->center_freq)); |
831 | if (IS_ERR(reg_rule)) { | |
ca4ffe8f LR |
832 | /* |
833 | * We will disable all channels that do not match our | |
25985edc | 834 | * received regulatory rule unless the hint is coming |
ca4ffe8f LR |
835 | * from a Country IE and the Country IE had no information |
836 | * about a band. The IEEE 802.11 spec allows for an AP | |
837 | * to send only a subset of the regulatory rules allowed, | |
838 | * so an AP in the US that only supports 2.4 GHz may only send | |
839 | * a country IE with information for the 2.4 GHz band | |
840 | * while 5 GHz is still supported. | |
841 | */ | |
842 | if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE && | |
361c9c8b | 843 | PTR_ERR(reg_rule) == -ERANGE) |
ca4ffe8f LR |
844 | return; |
845 | ||
d91e41b6 | 846 | REG_DBG_PRINT("Disabling freq %d MHz\n", chan->center_freq); |
990de49f | 847 | chan->flags |= IEEE80211_CHAN_DISABLED; |
8318d78a | 848 | return; |
ca4ffe8f | 849 | } |
8318d78a | 850 | |
fe7ef5e9 | 851 | chan_reg_rule_print_dbg(chan, reg_rule); |
e702d3cf | 852 | |
b2e1b302 | 853 | power_rule = ®_rule->power_rule; |
038659e7 LR |
854 | freq_range = ®_rule->freq_range; |
855 | ||
856 | if (freq_range->max_bandwidth_khz < MHZ_TO_KHZ(40)) | |
857 | bw_flags = IEEE80211_CHAN_NO_HT40; | |
c7a6ee27 JB |
858 | if (freq_range->max_bandwidth_khz < MHZ_TO_KHZ(80)) |
859 | bw_flags |= IEEE80211_CHAN_NO_80MHZ; | |
860 | if (freq_range->max_bandwidth_khz < MHZ_TO_KHZ(160)) | |
861 | bw_flags |= IEEE80211_CHAN_NO_160MHZ; | |
b2e1b302 | 862 | |
c492db37 | 863 | if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER && |
806a9e39 | 864 | request_wiphy && request_wiphy == wiphy && |
5be83de5 | 865 | request_wiphy->flags & WIPHY_FLAG_STRICT_REGULATORY) { |
fb1fc7ad | 866 | /* |
25985edc | 867 | * This guarantees the driver's requested regulatory domain |
f976376d | 868 | * will always be used as a base for further regulatory |
fb1fc7ad LR |
869 | * settings |
870 | */ | |
f976376d | 871 | chan->flags = chan->orig_flags = |
038659e7 | 872 | map_regdom_flags(reg_rule->flags) | bw_flags; |
f976376d LR |
873 | chan->max_antenna_gain = chan->orig_mag = |
874 | (int) MBI_TO_DBI(power_rule->max_antenna_gain); | |
279f0f55 | 875 | chan->max_reg_power = chan->max_power = chan->orig_mpwr = |
f976376d LR |
876 | (int) MBM_TO_DBM(power_rule->max_eirp); |
877 | return; | |
878 | } | |
879 | ||
04f39047 SW |
880 | chan->dfs_state = NL80211_DFS_USABLE; |
881 | chan->dfs_state_entered = jiffies; | |
882 | ||
aa3d7eef | 883 | chan->beacon_found = false; |
038659e7 | 884 | chan->flags = flags | bw_flags | map_regdom_flags(reg_rule->flags); |
1a919318 JB |
885 | chan->max_antenna_gain = |
886 | min_t(int, chan->orig_mag, | |
887 | MBI_TO_DBI(power_rule->max_antenna_gain)); | |
eccc068e | 888 | chan->max_reg_power = (int) MBM_TO_DBM(power_rule->max_eirp); |
5e31fc08 SG |
889 | if (chan->orig_mpwr) { |
890 | /* | |
891 | * Devices that have their own custom regulatory domain | |
892 | * but also use WIPHY_FLAG_STRICT_REGULATORY will follow the | |
893 | * passed country IE power settings. | |
894 | */ | |
895 | if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE && | |
896 | wiphy->flags & WIPHY_FLAG_CUSTOM_REGULATORY && | |
897 | wiphy->flags & WIPHY_FLAG_STRICT_REGULATORY) | |
898 | chan->max_power = chan->max_reg_power; | |
899 | else | |
900 | chan->max_power = min(chan->orig_mpwr, | |
901 | chan->max_reg_power); | |
902 | } else | |
903 | chan->max_power = chan->max_reg_power; | |
8318d78a JB |
904 | } |
905 | ||
7ca43d03 | 906 | static void handle_band(struct wiphy *wiphy, |
fdc9d7b2 JB |
907 | enum nl80211_reg_initiator initiator, |
908 | struct ieee80211_supported_band *sband) | |
8318d78a | 909 | { |
a92a3ce7 | 910 | unsigned int i; |
a92a3ce7 | 911 | |
fdc9d7b2 JB |
912 | if (!sband) |
913 | return; | |
8318d78a JB |
914 | |
915 | for (i = 0; i < sband->n_channels; i++) | |
fdc9d7b2 | 916 | handle_channel(wiphy, initiator, &sband->channels[i]); |
8318d78a JB |
917 | } |
918 | ||
57b5ce07 LR |
919 | static bool reg_request_cell_base(struct regulatory_request *request) |
920 | { | |
921 | if (request->initiator != NL80211_REGDOM_SET_BY_USER) | |
922 | return false; | |
1a919318 | 923 | return request->user_reg_hint_type == NL80211_USER_REG_HINT_CELL_BASE; |
57b5ce07 LR |
924 | } |
925 | ||
926 | bool reg_last_request_cell_base(void) | |
927 | { | |
38fd2143 | 928 | return reg_request_cell_base(get_last_request()); |
57b5ce07 LR |
929 | } |
930 | ||
931 | #ifdef CONFIG_CFG80211_CERTIFICATION_ONUS | |
57b5ce07 | 932 | /* Core specific check */ |
2f92212b JB |
933 | static enum reg_request_treatment |
934 | reg_ignore_cell_hint(struct regulatory_request *pending_request) | |
57b5ce07 | 935 | { |
c492db37 JB |
936 | struct regulatory_request *lr = get_last_request(); |
937 | ||
57b5ce07 | 938 | if (!reg_num_devs_support_basehint) |
2f92212b | 939 | return REG_REQ_IGNORE; |
57b5ce07 | 940 | |
c492db37 | 941 | if (reg_request_cell_base(lr) && |
1a919318 | 942 | !regdom_changes(pending_request->alpha2)) |
2f92212b | 943 | return REG_REQ_ALREADY_SET; |
1a919318 | 944 | |
2f92212b | 945 | return REG_REQ_OK; |
57b5ce07 LR |
946 | } |
947 | ||
948 | /* Device specific check */ | |
949 | static bool reg_dev_ignore_cell_hint(struct wiphy *wiphy) | |
950 | { | |
1a919318 | 951 | return !(wiphy->features & NL80211_FEATURE_CELL_BASE_REG_HINTS); |
57b5ce07 LR |
952 | } |
953 | #else | |
954 | static int reg_ignore_cell_hint(struct regulatory_request *pending_request) | |
955 | { | |
2f92212b | 956 | return REG_REQ_IGNORE; |
57b5ce07 | 957 | } |
1a919318 JB |
958 | |
959 | static bool reg_dev_ignore_cell_hint(struct wiphy *wiphy) | |
57b5ce07 LR |
960 | { |
961 | return true; | |
962 | } | |
963 | #endif | |
964 | ||
965 | ||
7db90f4a LR |
966 | static bool ignore_reg_update(struct wiphy *wiphy, |
967 | enum nl80211_reg_initiator initiator) | |
14b9815a | 968 | { |
c492db37 JB |
969 | struct regulatory_request *lr = get_last_request(); |
970 | ||
971 | if (!lr) { | |
1a919318 | 972 | REG_DBG_PRINT("Ignoring regulatory request %s since last_request is not set\n", |
926a0a09 | 973 | reg_initiator_name(initiator)); |
14b9815a | 974 | return true; |
926a0a09 LR |
975 | } |
976 | ||
7db90f4a | 977 | if (initiator == NL80211_REGDOM_SET_BY_CORE && |
926a0a09 | 978 | wiphy->flags & WIPHY_FLAG_CUSTOM_REGULATORY) { |
1a919318 | 979 | REG_DBG_PRINT("Ignoring regulatory request %s since the driver uses its own custom regulatory domain\n", |
926a0a09 | 980 | reg_initiator_name(initiator)); |
14b9815a | 981 | return true; |
926a0a09 LR |
982 | } |
983 | ||
fb1fc7ad LR |
984 | /* |
985 | * wiphy->regd will be set once the device has its own | |
986 | * desired regulatory domain set | |
987 | */ | |
5be83de5 | 988 | if (wiphy->flags & WIPHY_FLAG_STRICT_REGULATORY && !wiphy->regd && |
749b527b | 989 | initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && |
c492db37 | 990 | !is_world_regdom(lr->alpha2)) { |
1a919318 | 991 | REG_DBG_PRINT("Ignoring regulatory request %s since the driver requires its own regulatory domain to be set first\n", |
926a0a09 | 992 | reg_initiator_name(initiator)); |
14b9815a | 993 | return true; |
926a0a09 LR |
994 | } |
995 | ||
c492db37 | 996 | if (reg_request_cell_base(lr)) |
57b5ce07 LR |
997 | return reg_dev_ignore_cell_hint(wiphy); |
998 | ||
14b9815a LR |
999 | return false; |
1000 | } | |
1001 | ||
3195e489 LR |
1002 | static bool reg_is_world_roaming(struct wiphy *wiphy) |
1003 | { | |
1004 | const struct ieee80211_regdomain *cr = get_cfg80211_regdom(); | |
1005 | const struct ieee80211_regdomain *wr = get_wiphy_regdom(wiphy); | |
1006 | struct regulatory_request *lr = get_last_request(); | |
1007 | ||
1008 | if (is_world_regdom(cr->alpha2) || (wr && is_world_regdom(wr->alpha2))) | |
1009 | return true; | |
1010 | ||
1011 | if (lr && lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && | |
1012 | wiphy->flags & WIPHY_FLAG_CUSTOM_REGULATORY) | |
1013 | return true; | |
1014 | ||
1015 | return false; | |
1016 | } | |
1017 | ||
1a919318 | 1018 | static void handle_reg_beacon(struct wiphy *wiphy, unsigned int chan_idx, |
e38f8a7a LR |
1019 | struct reg_beacon *reg_beacon) |
1020 | { | |
e38f8a7a LR |
1021 | struct ieee80211_supported_band *sband; |
1022 | struct ieee80211_channel *chan; | |
6bad8766 LR |
1023 | bool channel_changed = false; |
1024 | struct ieee80211_channel chan_before; | |
e38f8a7a | 1025 | |
e38f8a7a LR |
1026 | sband = wiphy->bands[reg_beacon->chan.band]; |
1027 | chan = &sband->channels[chan_idx]; | |
1028 | ||
1029 | if (likely(chan->center_freq != reg_beacon->chan.center_freq)) | |
1030 | return; | |
1031 | ||
6bad8766 LR |
1032 | if (chan->beacon_found) |
1033 | return; | |
1034 | ||
1035 | chan->beacon_found = true; | |
1036 | ||
0f500a5f LR |
1037 | if (!reg_is_world_roaming(wiphy)) |
1038 | return; | |
1039 | ||
5be83de5 | 1040 | if (wiphy->flags & WIPHY_FLAG_DISABLE_BEACON_HINTS) |
37184244 LR |
1041 | return; |
1042 | ||
6bad8766 LR |
1043 | chan_before.center_freq = chan->center_freq; |
1044 | chan_before.flags = chan->flags; | |
1045 | ||
37184244 | 1046 | if (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN) { |
e38f8a7a | 1047 | chan->flags &= ~IEEE80211_CHAN_PASSIVE_SCAN; |
6bad8766 | 1048 | channel_changed = true; |
e38f8a7a LR |
1049 | } |
1050 | ||
37184244 | 1051 | if (chan->flags & IEEE80211_CHAN_NO_IBSS) { |
e38f8a7a | 1052 | chan->flags &= ~IEEE80211_CHAN_NO_IBSS; |
6bad8766 | 1053 | channel_changed = true; |
e38f8a7a LR |
1054 | } |
1055 | ||
6bad8766 LR |
1056 | if (channel_changed) |
1057 | nl80211_send_beacon_hint_event(wiphy, &chan_before, chan); | |
e38f8a7a LR |
1058 | } |
1059 | ||
1060 | /* | |
1061 | * Called when a scan on a wiphy finds a beacon on | |
1062 | * new channel | |
1063 | */ | |
1064 | static void wiphy_update_new_beacon(struct wiphy *wiphy, | |
1065 | struct reg_beacon *reg_beacon) | |
1066 | { | |
1067 | unsigned int i; | |
1068 | struct ieee80211_supported_band *sband; | |
1069 | ||
e38f8a7a LR |
1070 | if (!wiphy->bands[reg_beacon->chan.band]) |
1071 | return; | |
1072 | ||
1073 | sband = wiphy->bands[reg_beacon->chan.band]; | |
1074 | ||
1075 | for (i = 0; i < sband->n_channels; i++) | |
1076 | handle_reg_beacon(wiphy, i, reg_beacon); | |
1077 | } | |
1078 | ||
1079 | /* | |
1080 | * Called upon reg changes or a new wiphy is added | |
1081 | */ | |
1082 | static void wiphy_update_beacon_reg(struct wiphy *wiphy) | |
1083 | { | |
1084 | unsigned int i; | |
1085 | struct ieee80211_supported_band *sband; | |
1086 | struct reg_beacon *reg_beacon; | |
1087 | ||
e38f8a7a LR |
1088 | list_for_each_entry(reg_beacon, ®_beacon_list, list) { |
1089 | if (!wiphy->bands[reg_beacon->chan.band]) | |
1090 | continue; | |
1091 | sband = wiphy->bands[reg_beacon->chan.band]; | |
1092 | for (i = 0; i < sband->n_channels; i++) | |
1093 | handle_reg_beacon(wiphy, i, reg_beacon); | |
1094 | } | |
1095 | } | |
1096 | ||
e38f8a7a LR |
1097 | /* Reap the advantages of previously found beacons */ |
1098 | static void reg_process_beacons(struct wiphy *wiphy) | |
1099 | { | |
b1ed8ddd LR |
1100 | /* |
1101 | * Means we are just firing up cfg80211, so no beacons would | |
1102 | * have been processed yet. | |
1103 | */ | |
1104 | if (!last_request) | |
1105 | return; | |
e38f8a7a LR |
1106 | wiphy_update_beacon_reg(wiphy); |
1107 | } | |
1108 | ||
1a919318 | 1109 | static bool is_ht40_allowed(struct ieee80211_channel *chan) |
038659e7 LR |
1110 | { |
1111 | if (!chan) | |
1a919318 | 1112 | return false; |
038659e7 | 1113 | if (chan->flags & IEEE80211_CHAN_DISABLED) |
1a919318 | 1114 | return false; |
038659e7 | 1115 | /* This would happen when regulatory rules disallow HT40 completely */ |
55b183ad FF |
1116 | if ((chan->flags & IEEE80211_CHAN_NO_HT40) == IEEE80211_CHAN_NO_HT40) |
1117 | return false; | |
1118 | return true; | |
038659e7 LR |
1119 | } |
1120 | ||
1121 | static void reg_process_ht_flags_channel(struct wiphy *wiphy, | |
fdc9d7b2 | 1122 | struct ieee80211_channel *channel) |
038659e7 | 1123 | { |
fdc9d7b2 | 1124 | struct ieee80211_supported_band *sband = wiphy->bands[channel->band]; |
038659e7 LR |
1125 | struct ieee80211_channel *channel_before = NULL, *channel_after = NULL; |
1126 | unsigned int i; | |
1127 | ||
1a919318 | 1128 | if (!is_ht40_allowed(channel)) { |
038659e7 LR |
1129 | channel->flags |= IEEE80211_CHAN_NO_HT40; |
1130 | return; | |
1131 | } | |
1132 | ||
1133 | /* | |
1134 | * We need to ensure the extension channels exist to | |
1135 | * be able to use HT40- or HT40+, this finds them (or not) | |
1136 | */ | |
1137 | for (i = 0; i < sband->n_channels; i++) { | |
1138 | struct ieee80211_channel *c = &sband->channels[i]; | |
1a919318 | 1139 | |
038659e7 LR |
1140 | if (c->center_freq == (channel->center_freq - 20)) |
1141 | channel_before = c; | |
1142 | if (c->center_freq == (channel->center_freq + 20)) | |
1143 | channel_after = c; | |
1144 | } | |
1145 | ||
1146 | /* | |
1147 | * Please note that this assumes target bandwidth is 20 MHz, | |
1148 | * if that ever changes we also need to change the below logic | |
1149 | * to include that as well. | |
1150 | */ | |
1a919318 | 1151 | if (!is_ht40_allowed(channel_before)) |
689da1b3 | 1152 | channel->flags |= IEEE80211_CHAN_NO_HT40MINUS; |
038659e7 | 1153 | else |
689da1b3 | 1154 | channel->flags &= ~IEEE80211_CHAN_NO_HT40MINUS; |
038659e7 | 1155 | |
1a919318 | 1156 | if (!is_ht40_allowed(channel_after)) |
689da1b3 | 1157 | channel->flags |= IEEE80211_CHAN_NO_HT40PLUS; |
038659e7 | 1158 | else |
689da1b3 | 1159 | channel->flags &= ~IEEE80211_CHAN_NO_HT40PLUS; |
038659e7 LR |
1160 | } |
1161 | ||
1162 | static void reg_process_ht_flags_band(struct wiphy *wiphy, | |
fdc9d7b2 | 1163 | struct ieee80211_supported_band *sband) |
038659e7 LR |
1164 | { |
1165 | unsigned int i; | |
038659e7 | 1166 | |
fdc9d7b2 JB |
1167 | if (!sband) |
1168 | return; | |
038659e7 LR |
1169 | |
1170 | for (i = 0; i < sband->n_channels; i++) | |
fdc9d7b2 | 1171 | reg_process_ht_flags_channel(wiphy, &sband->channels[i]); |
038659e7 LR |
1172 | } |
1173 | ||
1174 | static void reg_process_ht_flags(struct wiphy *wiphy) | |
1175 | { | |
1176 | enum ieee80211_band band; | |
1177 | ||
1178 | if (!wiphy) | |
1179 | return; | |
1180 | ||
fdc9d7b2 JB |
1181 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) |
1182 | reg_process_ht_flags_band(wiphy, wiphy->bands[band]); | |
038659e7 LR |
1183 | } |
1184 | ||
eac03e38 SN |
1185 | static void wiphy_update_regulatory(struct wiphy *wiphy, |
1186 | enum nl80211_reg_initiator initiator) | |
b2e1b302 LR |
1187 | { |
1188 | enum ieee80211_band band; | |
c492db37 | 1189 | struct regulatory_request *lr = get_last_request(); |
eac03e38 | 1190 | |
7db90f4a | 1191 | if (ignore_reg_update(wiphy, initiator)) |
a203c2aa SN |
1192 | return; |
1193 | ||
c492db37 | 1194 | lr->dfs_region = get_cfg80211_regdom()->dfs_region; |
b68e6b3b | 1195 | |
fdc9d7b2 JB |
1196 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) |
1197 | handle_band(wiphy, initiator, wiphy->bands[band]); | |
a203c2aa | 1198 | |
e38f8a7a | 1199 | reg_process_beacons(wiphy); |
038659e7 | 1200 | reg_process_ht_flags(wiphy); |
1a919318 | 1201 | |
560e28e1 | 1202 | if (wiphy->reg_notifier) |
c492db37 | 1203 | wiphy->reg_notifier(wiphy, lr); |
b2e1b302 LR |
1204 | } |
1205 | ||
d7549cbb SN |
1206 | static void update_all_wiphy_regulatory(enum nl80211_reg_initiator initiator) |
1207 | { | |
1208 | struct cfg80211_registered_device *rdev; | |
4a38994f | 1209 | struct wiphy *wiphy; |
d7549cbb | 1210 | |
5fe231e8 | 1211 | ASSERT_RTNL(); |
458f4f9e | 1212 | |
4a38994f RM |
1213 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) { |
1214 | wiphy = &rdev->wiphy; | |
1215 | wiphy_update_regulatory(wiphy, initiator); | |
1216 | /* | |
1217 | * Regulatory updates set by CORE are ignored for custom | |
1218 | * regulatory cards. Let us notify the changes to the driver, | |
1219 | * as some drivers used this to restore its orig_* reg domain. | |
1220 | */ | |
1221 | if (initiator == NL80211_REGDOM_SET_BY_CORE && | |
1222 | wiphy->flags & WIPHY_FLAG_CUSTOM_REGULATORY && | |
1223 | wiphy->reg_notifier) | |
c492db37 | 1224 | wiphy->reg_notifier(wiphy, get_last_request()); |
4a38994f | 1225 | } |
d7549cbb SN |
1226 | } |
1227 | ||
1fa25e41 | 1228 | static void handle_channel_custom(struct wiphy *wiphy, |
fdc9d7b2 | 1229 | struct ieee80211_channel *chan, |
1fa25e41 LR |
1230 | const struct ieee80211_regdomain *regd) |
1231 | { | |
038659e7 | 1232 | u32 bw_flags = 0; |
1fa25e41 LR |
1233 | const struct ieee80211_reg_rule *reg_rule = NULL; |
1234 | const struct ieee80211_power_rule *power_rule = NULL; | |
038659e7 | 1235 | const struct ieee80211_freq_range *freq_range = NULL; |
ac46d48e | 1236 | |
361c9c8b JB |
1237 | reg_rule = freq_reg_info_regd(wiphy, MHZ_TO_KHZ(chan->center_freq), |
1238 | regd); | |
1fa25e41 | 1239 | |
361c9c8b | 1240 | if (IS_ERR(reg_rule)) { |
fe7ef5e9 JB |
1241 | REG_DBG_PRINT("Disabling freq %d MHz as custom regd has no rule that fits it\n", |
1242 | chan->center_freq); | |
1fa25e41 LR |
1243 | chan->flags = IEEE80211_CHAN_DISABLED; |
1244 | return; | |
1245 | } | |
1246 | ||
fe7ef5e9 | 1247 | chan_reg_rule_print_dbg(chan, reg_rule); |
e702d3cf | 1248 | |
1fa25e41 | 1249 | power_rule = ®_rule->power_rule; |
038659e7 LR |
1250 | freq_range = ®_rule->freq_range; |
1251 | ||
1252 | if (freq_range->max_bandwidth_khz < MHZ_TO_KHZ(40)) | |
1253 | bw_flags = IEEE80211_CHAN_NO_HT40; | |
c7a6ee27 JB |
1254 | if (freq_range->max_bandwidth_khz < MHZ_TO_KHZ(80)) |
1255 | bw_flags |= IEEE80211_CHAN_NO_80MHZ; | |
1256 | if (freq_range->max_bandwidth_khz < MHZ_TO_KHZ(160)) | |
1257 | bw_flags |= IEEE80211_CHAN_NO_160MHZ; | |
1fa25e41 | 1258 | |
038659e7 | 1259 | chan->flags |= map_regdom_flags(reg_rule->flags) | bw_flags; |
1fa25e41 | 1260 | chan->max_antenna_gain = (int) MBI_TO_DBI(power_rule->max_antenna_gain); |
279f0f55 FF |
1261 | chan->max_reg_power = chan->max_power = |
1262 | (int) MBM_TO_DBM(power_rule->max_eirp); | |
1fa25e41 LR |
1263 | } |
1264 | ||
fdc9d7b2 JB |
1265 | static void handle_band_custom(struct wiphy *wiphy, |
1266 | struct ieee80211_supported_band *sband, | |
1fa25e41 LR |
1267 | const struct ieee80211_regdomain *regd) |
1268 | { | |
1269 | unsigned int i; | |
1fa25e41 | 1270 | |
fdc9d7b2 JB |
1271 | if (!sband) |
1272 | return; | |
1fa25e41 LR |
1273 | |
1274 | for (i = 0; i < sband->n_channels; i++) | |
fdc9d7b2 | 1275 | handle_channel_custom(wiphy, &sband->channels[i], regd); |
1fa25e41 LR |
1276 | } |
1277 | ||
1278 | /* Used by drivers prior to wiphy registration */ | |
1279 | void wiphy_apply_custom_regulatory(struct wiphy *wiphy, | |
1280 | const struct ieee80211_regdomain *regd) | |
1281 | { | |
1282 | enum ieee80211_band band; | |
bbcf3f02 | 1283 | unsigned int bands_set = 0; |
ac46d48e | 1284 | |
1fa25e41 | 1285 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) { |
bbcf3f02 LR |
1286 | if (!wiphy->bands[band]) |
1287 | continue; | |
fdc9d7b2 | 1288 | handle_band_custom(wiphy, wiphy->bands[band], regd); |
bbcf3f02 | 1289 | bands_set++; |
b2e1b302 | 1290 | } |
bbcf3f02 LR |
1291 | |
1292 | /* | |
1293 | * no point in calling this if it won't have any effect | |
1a919318 | 1294 | * on your device's supported bands. |
bbcf3f02 LR |
1295 | */ |
1296 | WARN_ON(!bands_set); | |
b2e1b302 | 1297 | } |
1fa25e41 LR |
1298 | EXPORT_SYMBOL(wiphy_apply_custom_regulatory); |
1299 | ||
84fa4f43 JB |
1300 | /* This has the logic which determines when a new request |
1301 | * should be ignored. */ | |
2f92212b JB |
1302 | static enum reg_request_treatment |
1303 | get_reg_request_treatment(struct wiphy *wiphy, | |
2f92cd2e | 1304 | struct regulatory_request *pending_request) |
84fa4f43 | 1305 | { |
806a9e39 | 1306 | struct wiphy *last_wiphy = NULL; |
c492db37 | 1307 | struct regulatory_request *lr = get_last_request(); |
761cf7ec | 1308 | |
84fa4f43 | 1309 | /* All initial requests are respected */ |
c492db37 | 1310 | if (!lr) |
2f92212b | 1311 | return REG_REQ_OK; |
84fa4f43 | 1312 | |
2f92cd2e | 1313 | switch (pending_request->initiator) { |
7db90f4a | 1314 | case NL80211_REGDOM_SET_BY_CORE: |
2f92212b | 1315 | return REG_REQ_OK; |
7db90f4a | 1316 | case NL80211_REGDOM_SET_BY_COUNTRY_IE: |
c492db37 | 1317 | if (reg_request_cell_base(lr)) { |
57b5ce07 LR |
1318 | /* Trust a Cell base station over the AP's country IE */ |
1319 | if (regdom_changes(pending_request->alpha2)) | |
2f92212b JB |
1320 | return REG_REQ_IGNORE; |
1321 | return REG_REQ_ALREADY_SET; | |
57b5ce07 LR |
1322 | } |
1323 | ||
c492db37 | 1324 | last_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx); |
806a9e39 | 1325 | |
2f92cd2e | 1326 | if (unlikely(!is_an_alpha2(pending_request->alpha2))) |
84fa4f43 | 1327 | return -EINVAL; |
c492db37 | 1328 | if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) { |
806a9e39 | 1329 | if (last_wiphy != wiphy) { |
84fa4f43 JB |
1330 | /* |
1331 | * Two cards with two APs claiming different | |
1fe90b03 | 1332 | * Country IE alpha2s. We could |
84fa4f43 JB |
1333 | * intersect them, but that seems unlikely |
1334 | * to be correct. Reject second one for now. | |
1335 | */ | |
2f92cd2e | 1336 | if (regdom_changes(pending_request->alpha2)) |
2f92212b JB |
1337 | return REG_REQ_IGNORE; |
1338 | return REG_REQ_ALREADY_SET; | |
84fa4f43 | 1339 | } |
fb1fc7ad LR |
1340 | /* |
1341 | * Two consecutive Country IE hints on the same wiphy. | |
1342 | * This should be picked up early by the driver/stack | |
1343 | */ | |
2f92cd2e | 1344 | if (WARN_ON(regdom_changes(pending_request->alpha2))) |
2f92212b JB |
1345 | return REG_REQ_OK; |
1346 | return REG_REQ_ALREADY_SET; | |
84fa4f43 | 1347 | } |
a171fba4 | 1348 | return 0; |
7db90f4a | 1349 | case NL80211_REGDOM_SET_BY_DRIVER: |
c492db37 | 1350 | if (lr->initiator == NL80211_REGDOM_SET_BY_CORE) { |
2f92cd2e | 1351 | if (regdom_changes(pending_request->alpha2)) |
2f92212b JB |
1352 | return REG_REQ_OK; |
1353 | return REG_REQ_ALREADY_SET; | |
e74b1e7f | 1354 | } |
fff32c04 LR |
1355 | |
1356 | /* | |
1357 | * This would happen if you unplug and plug your card | |
1358 | * back in or if you add a new device for which the previously | |
1359 | * loaded card also agrees on the regulatory domain. | |
1360 | */ | |
c492db37 | 1361 | if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER && |
2f92cd2e | 1362 | !regdom_changes(pending_request->alpha2)) |
2f92212b | 1363 | return REG_REQ_ALREADY_SET; |
fff32c04 | 1364 | |
2f92212b | 1365 | return REG_REQ_INTERSECT; |
7db90f4a | 1366 | case NL80211_REGDOM_SET_BY_USER: |
57b5ce07 LR |
1367 | if (reg_request_cell_base(pending_request)) |
1368 | return reg_ignore_cell_hint(pending_request); | |
1369 | ||
c492db37 | 1370 | if (reg_request_cell_base(lr)) |
2f92212b | 1371 | return REG_REQ_IGNORE; |
57b5ce07 | 1372 | |
c492db37 | 1373 | if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) |
2f92212b | 1374 | return REG_REQ_INTERSECT; |
fb1fc7ad LR |
1375 | /* |
1376 | * If the user knows better the user should set the regdom | |
1377 | * to their country before the IE is picked up | |
1378 | */ | |
c492db37 JB |
1379 | if (lr->initiator == NL80211_REGDOM_SET_BY_USER && |
1380 | lr->intersect) | |
2f92212b | 1381 | return REG_REQ_IGNORE; |
fb1fc7ad LR |
1382 | /* |
1383 | * Process user requests only after previous user/driver/core | |
1384 | * requests have been processed | |
1385 | */ | |
c492db37 JB |
1386 | if ((lr->initiator == NL80211_REGDOM_SET_BY_CORE || |
1387 | lr->initiator == NL80211_REGDOM_SET_BY_DRIVER || | |
1388 | lr->initiator == NL80211_REGDOM_SET_BY_USER) && | |
1389 | regdom_changes(lr->alpha2)) | |
2f92212b | 1390 | return REG_REQ_IGNORE; |
5eebade6 | 1391 | |
baeb66fe | 1392 | if (!regdom_changes(pending_request->alpha2)) |
2f92212b | 1393 | return REG_REQ_ALREADY_SET; |
e74b1e7f | 1394 | |
2f92212b | 1395 | return REG_REQ_OK; |
84fa4f43 JB |
1396 | } |
1397 | ||
2f92212b | 1398 | return REG_REQ_IGNORE; |
84fa4f43 JB |
1399 | } |
1400 | ||
b2e253cf LR |
1401 | static void reg_set_request_processed(void) |
1402 | { | |
1403 | bool need_more_processing = false; | |
c492db37 | 1404 | struct regulatory_request *lr = get_last_request(); |
b2e253cf | 1405 | |
c492db37 | 1406 | lr->processed = true; |
b2e253cf LR |
1407 | |
1408 | spin_lock(®_requests_lock); | |
1409 | if (!list_empty(®_requests_list)) | |
1410 | need_more_processing = true; | |
1411 | spin_unlock(®_requests_lock); | |
1412 | ||
c492db37 | 1413 | if (lr->initiator == NL80211_REGDOM_SET_BY_USER) |
fe20b39e | 1414 | cancel_delayed_work(®_timeout); |
a90c7a31 | 1415 | |
b2e253cf LR |
1416 | if (need_more_processing) |
1417 | schedule_work(®_work); | |
1418 | } | |
1419 | ||
d1c96a9a LR |
1420 | /** |
1421 | * __regulatory_hint - hint to the wireless core a regulatory domain | |
1422 | * @wiphy: if the hint comes from country information from an AP, this | |
1423 | * is required to be set to the wiphy that received the information | |
28da32d7 | 1424 | * @pending_request: the regulatory request currently being processed |
d1c96a9a LR |
1425 | * |
1426 | * The Wireless subsystem can use this function to hint to the wireless core | |
28da32d7 | 1427 | * what it believes should be the current regulatory domain. |
d1c96a9a | 1428 | * |
2f92212b | 1429 | * Returns one of the different reg request treatment values. |
d1c96a9a | 1430 | */ |
2f92212b JB |
1431 | static enum reg_request_treatment |
1432 | __regulatory_hint(struct wiphy *wiphy, | |
1433 | struct regulatory_request *pending_request) | |
b2e1b302 | 1434 | { |
e9763c3c | 1435 | const struct ieee80211_regdomain *regd; |
9c96477d | 1436 | bool intersect = false; |
2f92212b | 1437 | enum reg_request_treatment treatment; |
c492db37 | 1438 | struct regulatory_request *lr; |
761cf7ec | 1439 | |
2f92212b | 1440 | treatment = get_reg_request_treatment(wiphy, pending_request); |
9c96477d | 1441 | |
2f92212b JB |
1442 | switch (treatment) { |
1443 | case REG_REQ_INTERSECT: | |
7db90f4a LR |
1444 | if (pending_request->initiator == |
1445 | NL80211_REGDOM_SET_BY_DRIVER) { | |
458f4f9e | 1446 | regd = reg_copy_regd(get_cfg80211_regdom()); |
e9763c3c | 1447 | if (IS_ERR(regd)) { |
d951c1dd | 1448 | kfree(pending_request); |
e9763c3c | 1449 | return PTR_ERR(regd); |
d951c1dd | 1450 | } |
458f4f9e | 1451 | rcu_assign_pointer(wiphy->regd, regd); |
3e0c3ff3 | 1452 | } |
9c96477d | 1453 | intersect = true; |
2f92212b JB |
1454 | break; |
1455 | case REG_REQ_OK: | |
1456 | break; | |
1457 | default: | |
fb1fc7ad LR |
1458 | /* |
1459 | * If the regulatory domain being requested by the | |
3e0c3ff3 | 1460 | * driver has already been set just copy it to the |
fb1fc7ad LR |
1461 | * wiphy |
1462 | */ | |
2f92212b JB |
1463 | if (treatment == REG_REQ_ALREADY_SET && |
1464 | pending_request->initiator == NL80211_REGDOM_SET_BY_DRIVER) { | |
458f4f9e | 1465 | regd = reg_copy_regd(get_cfg80211_regdom()); |
e9763c3c | 1466 | if (IS_ERR(regd)) { |
d951c1dd | 1467 | kfree(pending_request); |
2f92212b | 1468 | return REG_REQ_IGNORE; |
d951c1dd | 1469 | } |
2f92212b | 1470 | treatment = REG_REQ_ALREADY_SET; |
458f4f9e | 1471 | rcu_assign_pointer(wiphy->regd, regd); |
3e0c3ff3 LR |
1472 | goto new_request; |
1473 | } | |
d951c1dd | 1474 | kfree(pending_request); |
2f92212b | 1475 | return treatment; |
3e0c3ff3 | 1476 | } |
b2e1b302 | 1477 | |
3e0c3ff3 | 1478 | new_request: |
c492db37 JB |
1479 | lr = get_last_request(); |
1480 | if (lr != &core_request_world && lr) | |
1481 | kfree_rcu(lr, rcu_head); | |
5203cdb6 | 1482 | |
c492db37 JB |
1483 | pending_request->intersect = intersect; |
1484 | pending_request->processed = false; | |
1485 | rcu_assign_pointer(last_request, pending_request); | |
1486 | lr = pending_request; | |
5203cdb6 | 1487 | |
d951c1dd | 1488 | pending_request = NULL; |
3e0c3ff3 | 1489 | |
c492db37 JB |
1490 | if (lr->initiator == NL80211_REGDOM_SET_BY_USER) { |
1491 | user_alpha2[0] = lr->alpha2[0]; | |
1492 | user_alpha2[1] = lr->alpha2[1]; | |
09d989d1 LR |
1493 | } |
1494 | ||
2f92212b JB |
1495 | /* When r == REG_REQ_INTERSECT we do need to call CRDA */ |
1496 | if (treatment != REG_REQ_OK && treatment != REG_REQ_INTERSECT) { | |
73d54c9e LR |
1497 | /* |
1498 | * Since CRDA will not be called in this case as we already | |
1499 | * have applied the requested regulatory domain before we just | |
1500 | * inform userspace we have processed the request | |
1501 | */ | |
2f92212b | 1502 | if (treatment == REG_REQ_ALREADY_SET) { |
c492db37 | 1503 | nl80211_send_reg_change_event(lr); |
b2e253cf LR |
1504 | reg_set_request_processed(); |
1505 | } | |
2f92212b | 1506 | return treatment; |
73d54c9e | 1507 | } |
3e0c3ff3 | 1508 | |
c492db37 | 1509 | if (call_crda(lr->alpha2)) |
2f92212b JB |
1510 | return REG_REQ_IGNORE; |
1511 | return REG_REQ_OK; | |
b2e1b302 LR |
1512 | } |
1513 | ||
30a548c7 | 1514 | /* This processes *all* regulatory hints */ |
8848bef0 LR |
1515 | static void reg_process_hint(struct regulatory_request *reg_request, |
1516 | enum nl80211_reg_initiator reg_initiator) | |
fe33eb39 | 1517 | { |
fe33eb39 LR |
1518 | struct wiphy *wiphy = NULL; |
1519 | ||
fdc9d7b2 JB |
1520 | if (WARN_ON(!reg_request->alpha2)) |
1521 | return; | |
fe33eb39 | 1522 | |
f4173766 | 1523 | if (reg_request->wiphy_idx != WIPHY_IDX_INVALID) |
fe33eb39 LR |
1524 | wiphy = wiphy_idx_to_wiphy(reg_request->wiphy_idx); |
1525 | ||
1a919318 | 1526 | if (reg_initiator == NL80211_REGDOM_SET_BY_DRIVER && !wiphy) { |
d951c1dd | 1527 | kfree(reg_request); |
b0e2880b | 1528 | return; |
fe33eb39 LR |
1529 | } |
1530 | ||
2f92212b JB |
1531 | switch (__regulatory_hint(wiphy, reg_request)) { |
1532 | case REG_REQ_ALREADY_SET: | |
1533 | /* This is required so that the orig_* parameters are saved */ | |
1534 | if (wiphy && wiphy->flags & WIPHY_FLAG_STRICT_REGULATORY) | |
1535 | wiphy_update_regulatory(wiphy, reg_initiator); | |
1536 | break; | |
1537 | default: | |
1538 | if (reg_initiator == NL80211_REGDOM_SET_BY_USER) | |
1539 | schedule_delayed_work(®_timeout, | |
1540 | msecs_to_jiffies(3142)); | |
1541 | break; | |
a90c7a31 | 1542 | } |
fe33eb39 LR |
1543 | } |
1544 | ||
b2e253cf LR |
1545 | /* |
1546 | * Processes regulatory hints, this is all the NL80211_REGDOM_SET_BY_* | |
1547 | * Regulatory hints come on a first come first serve basis and we | |
1548 | * must process each one atomically. | |
1549 | */ | |
fe33eb39 | 1550 | static void reg_process_pending_hints(void) |
b0e2880b | 1551 | { |
c492db37 | 1552 | struct regulatory_request *reg_request, *lr; |
fe33eb39 | 1553 | |
c492db37 | 1554 | lr = get_last_request(); |
b0e2880b | 1555 | |
b2e253cf | 1556 | /* When last_request->processed becomes true this will be rescheduled */ |
c492db37 | 1557 | if (lr && !lr->processed) { |
1a919318 | 1558 | REG_DBG_PRINT("Pending regulatory request, waiting for it to be processed...\n"); |
5fe231e8 | 1559 | return; |
b2e253cf LR |
1560 | } |
1561 | ||
fe33eb39 | 1562 | spin_lock(®_requests_lock); |
fe33eb39 | 1563 | |
b2e253cf | 1564 | if (list_empty(®_requests_list)) { |
d951c1dd | 1565 | spin_unlock(®_requests_lock); |
5fe231e8 | 1566 | return; |
fe33eb39 | 1567 | } |
b2e253cf LR |
1568 | |
1569 | reg_request = list_first_entry(®_requests_list, | |
1570 | struct regulatory_request, | |
1571 | list); | |
1572 | list_del_init(®_request->list); | |
1573 | ||
fe33eb39 | 1574 | spin_unlock(®_requests_lock); |
b0e2880b | 1575 | |
8848bef0 | 1576 | reg_process_hint(reg_request, reg_request->initiator); |
fe33eb39 LR |
1577 | } |
1578 | ||
e38f8a7a LR |
1579 | /* Processes beacon hints -- this has nothing to do with country IEs */ |
1580 | static void reg_process_pending_beacon_hints(void) | |
1581 | { | |
79c97e97 | 1582 | struct cfg80211_registered_device *rdev; |
e38f8a7a LR |
1583 | struct reg_beacon *pending_beacon, *tmp; |
1584 | ||
e38f8a7a LR |
1585 | /* This goes through the _pending_ beacon list */ |
1586 | spin_lock_bh(®_pending_beacons_lock); | |
1587 | ||
e38f8a7a LR |
1588 | list_for_each_entry_safe(pending_beacon, tmp, |
1589 | ®_pending_beacons, list) { | |
e38f8a7a LR |
1590 | list_del_init(&pending_beacon->list); |
1591 | ||
1592 | /* Applies the beacon hint to current wiphys */ | |
79c97e97 JB |
1593 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) |
1594 | wiphy_update_new_beacon(&rdev->wiphy, pending_beacon); | |
e38f8a7a LR |
1595 | |
1596 | /* Remembers the beacon hint for new wiphys or reg changes */ | |
1597 | list_add_tail(&pending_beacon->list, ®_beacon_list); | |
1598 | } | |
1599 | ||
1600 | spin_unlock_bh(®_pending_beacons_lock); | |
e38f8a7a LR |
1601 | } |
1602 | ||
fe33eb39 LR |
1603 | static void reg_todo(struct work_struct *work) |
1604 | { | |
5fe231e8 | 1605 | rtnl_lock(); |
fe33eb39 | 1606 | reg_process_pending_hints(); |
e38f8a7a | 1607 | reg_process_pending_beacon_hints(); |
5fe231e8 | 1608 | rtnl_unlock(); |
fe33eb39 LR |
1609 | } |
1610 | ||
fe33eb39 LR |
1611 | static void queue_regulatory_request(struct regulatory_request *request) |
1612 | { | |
d4f2c881 JB |
1613 | request->alpha2[0] = toupper(request->alpha2[0]); |
1614 | request->alpha2[1] = toupper(request->alpha2[1]); | |
c61029c7 | 1615 | |
fe33eb39 LR |
1616 | spin_lock(®_requests_lock); |
1617 | list_add_tail(&request->list, ®_requests_list); | |
1618 | spin_unlock(®_requests_lock); | |
1619 | ||
1620 | schedule_work(®_work); | |
1621 | } | |
1622 | ||
09d989d1 LR |
1623 | /* |
1624 | * Core regulatory hint -- happens during cfg80211_init() | |
1625 | * and when we restore regulatory settings. | |
1626 | */ | |
ba25c141 LR |
1627 | static int regulatory_hint_core(const char *alpha2) |
1628 | { | |
1629 | struct regulatory_request *request; | |
1630 | ||
1a919318 | 1631 | request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); |
ba25c141 LR |
1632 | if (!request) |
1633 | return -ENOMEM; | |
1634 | ||
1635 | request->alpha2[0] = alpha2[0]; | |
1636 | request->alpha2[1] = alpha2[1]; | |
7db90f4a | 1637 | request->initiator = NL80211_REGDOM_SET_BY_CORE; |
ba25c141 | 1638 | |
31e99729 | 1639 | queue_regulatory_request(request); |
5078b2e3 | 1640 | |
fe33eb39 | 1641 | return 0; |
ba25c141 LR |
1642 | } |
1643 | ||
fe33eb39 | 1644 | /* User hints */ |
57b5ce07 LR |
1645 | int regulatory_hint_user(const char *alpha2, |
1646 | enum nl80211_user_reg_hint_type user_reg_hint_type) | |
b2e1b302 | 1647 | { |
fe33eb39 LR |
1648 | struct regulatory_request *request; |
1649 | ||
fdc9d7b2 JB |
1650 | if (WARN_ON(!alpha2)) |
1651 | return -EINVAL; | |
b2e1b302 | 1652 | |
fe33eb39 LR |
1653 | request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); |
1654 | if (!request) | |
1655 | return -ENOMEM; | |
1656 | ||
f4173766 | 1657 | request->wiphy_idx = WIPHY_IDX_INVALID; |
fe33eb39 LR |
1658 | request->alpha2[0] = alpha2[0]; |
1659 | request->alpha2[1] = alpha2[1]; | |
e12822e1 | 1660 | request->initiator = NL80211_REGDOM_SET_BY_USER; |
57b5ce07 | 1661 | request->user_reg_hint_type = user_reg_hint_type; |
fe33eb39 LR |
1662 | |
1663 | queue_regulatory_request(request); | |
1664 | ||
1665 | return 0; | |
1666 | } | |
1667 | ||
1668 | /* Driver hints */ | |
1669 | int regulatory_hint(struct wiphy *wiphy, const char *alpha2) | |
1670 | { | |
1671 | struct regulatory_request *request; | |
1672 | ||
fdc9d7b2 JB |
1673 | if (WARN_ON(!alpha2 || !wiphy)) |
1674 | return -EINVAL; | |
fe33eb39 LR |
1675 | |
1676 | request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); | |
1677 | if (!request) | |
1678 | return -ENOMEM; | |
1679 | ||
1680 | request->wiphy_idx = get_wiphy_idx(wiphy); | |
1681 | ||
fe33eb39 LR |
1682 | request->alpha2[0] = alpha2[0]; |
1683 | request->alpha2[1] = alpha2[1]; | |
7db90f4a | 1684 | request->initiator = NL80211_REGDOM_SET_BY_DRIVER; |
fe33eb39 LR |
1685 | |
1686 | queue_regulatory_request(request); | |
1687 | ||
1688 | return 0; | |
b2e1b302 LR |
1689 | } |
1690 | EXPORT_SYMBOL(regulatory_hint); | |
1691 | ||
1a919318 JB |
1692 | void regulatory_hint_11d(struct wiphy *wiphy, enum ieee80211_band band, |
1693 | const u8 *country_ie, u8 country_ie_len) | |
3f2355cb | 1694 | { |
3f2355cb | 1695 | char alpha2[2]; |
3f2355cb | 1696 | enum environment_cap env = ENVIRON_ANY; |
db2424c5 | 1697 | struct regulatory_request *request = NULL, *lr; |
d335fe63 | 1698 | |
3f2355cb LR |
1699 | /* IE len must be evenly divisible by 2 */ |
1700 | if (country_ie_len & 0x01) | |
db2424c5 | 1701 | return; |
3f2355cb LR |
1702 | |
1703 | if (country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN) | |
db2424c5 JB |
1704 | return; |
1705 | ||
1706 | request = kzalloc(sizeof(*request), GFP_KERNEL); | |
1707 | if (!request) | |
1708 | return; | |
3f2355cb | 1709 | |
3f2355cb LR |
1710 | alpha2[0] = country_ie[0]; |
1711 | alpha2[1] = country_ie[1]; | |
1712 | ||
1713 | if (country_ie[2] == 'I') | |
1714 | env = ENVIRON_INDOOR; | |
1715 | else if (country_ie[2] == 'O') | |
1716 | env = ENVIRON_OUTDOOR; | |
1717 | ||
db2424c5 JB |
1718 | rcu_read_lock(); |
1719 | lr = get_last_request(); | |
1720 | ||
1721 | if (unlikely(!lr)) | |
1722 | goto out; | |
1723 | ||
fb1fc7ad | 1724 | /* |
8b19e6ca | 1725 | * We will run this only upon a successful connection on cfg80211. |
4b44c8bc | 1726 | * We leave conflict resolution to the workqueue, where can hold |
5fe231e8 | 1727 | * the RTNL. |
fb1fc7ad | 1728 | */ |
c492db37 JB |
1729 | if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE && |
1730 | lr->wiphy_idx != WIPHY_IDX_INVALID) | |
4b44c8bc | 1731 | goto out; |
3f2355cb | 1732 | |
fe33eb39 | 1733 | request->wiphy_idx = get_wiphy_idx(wiphy); |
4f366c5d JL |
1734 | request->alpha2[0] = alpha2[0]; |
1735 | request->alpha2[1] = alpha2[1]; | |
7db90f4a | 1736 | request->initiator = NL80211_REGDOM_SET_BY_COUNTRY_IE; |
fe33eb39 LR |
1737 | request->country_ie_env = env; |
1738 | ||
fe33eb39 | 1739 | queue_regulatory_request(request); |
db2424c5 | 1740 | request = NULL; |
3f2355cb | 1741 | out: |
db2424c5 JB |
1742 | kfree(request); |
1743 | rcu_read_unlock(); | |
3f2355cb | 1744 | } |
b2e1b302 | 1745 | |
09d989d1 LR |
1746 | static void restore_alpha2(char *alpha2, bool reset_user) |
1747 | { | |
1748 | /* indicates there is no alpha2 to consider for restoration */ | |
1749 | alpha2[0] = '9'; | |
1750 | alpha2[1] = '7'; | |
1751 | ||
1752 | /* The user setting has precedence over the module parameter */ | |
1753 | if (is_user_regdom_saved()) { | |
1754 | /* Unless we're asked to ignore it and reset it */ | |
1755 | if (reset_user) { | |
1a919318 | 1756 | REG_DBG_PRINT("Restoring regulatory settings including user preference\n"); |
09d989d1 LR |
1757 | user_alpha2[0] = '9'; |
1758 | user_alpha2[1] = '7'; | |
1759 | ||
1760 | /* | |
1761 | * If we're ignoring user settings, we still need to | |
1762 | * check the module parameter to ensure we put things | |
1763 | * back as they were for a full restore. | |
1764 | */ | |
1765 | if (!is_world_regdom(ieee80211_regdom)) { | |
1a919318 JB |
1766 | REG_DBG_PRINT("Keeping preference on module parameter ieee80211_regdom: %c%c\n", |
1767 | ieee80211_regdom[0], ieee80211_regdom[1]); | |
09d989d1 LR |
1768 | alpha2[0] = ieee80211_regdom[0]; |
1769 | alpha2[1] = ieee80211_regdom[1]; | |
1770 | } | |
1771 | } else { | |
1a919318 JB |
1772 | REG_DBG_PRINT("Restoring regulatory settings while preserving user preference for: %c%c\n", |
1773 | user_alpha2[0], user_alpha2[1]); | |
09d989d1 LR |
1774 | alpha2[0] = user_alpha2[0]; |
1775 | alpha2[1] = user_alpha2[1]; | |
1776 | } | |
1777 | } else if (!is_world_regdom(ieee80211_regdom)) { | |
1a919318 JB |
1778 | REG_DBG_PRINT("Keeping preference on module parameter ieee80211_regdom: %c%c\n", |
1779 | ieee80211_regdom[0], ieee80211_regdom[1]); | |
09d989d1 LR |
1780 | alpha2[0] = ieee80211_regdom[0]; |
1781 | alpha2[1] = ieee80211_regdom[1]; | |
1782 | } else | |
d91e41b6 | 1783 | REG_DBG_PRINT("Restoring regulatory settings\n"); |
09d989d1 LR |
1784 | } |
1785 | ||
5ce543d1 RM |
1786 | static void restore_custom_reg_settings(struct wiphy *wiphy) |
1787 | { | |
1788 | struct ieee80211_supported_band *sband; | |
1789 | enum ieee80211_band band; | |
1790 | struct ieee80211_channel *chan; | |
1791 | int i; | |
1792 | ||
1793 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) { | |
1794 | sband = wiphy->bands[band]; | |
1795 | if (!sband) | |
1796 | continue; | |
1797 | for (i = 0; i < sband->n_channels; i++) { | |
1798 | chan = &sband->channels[i]; | |
1799 | chan->flags = chan->orig_flags; | |
1800 | chan->max_antenna_gain = chan->orig_mag; | |
1801 | chan->max_power = chan->orig_mpwr; | |
899852af | 1802 | chan->beacon_found = false; |
5ce543d1 RM |
1803 | } |
1804 | } | |
1805 | } | |
1806 | ||
09d989d1 LR |
1807 | /* |
1808 | * Restoring regulatory settings involves ingoring any | |
1809 | * possibly stale country IE information and user regulatory | |
1810 | * settings if so desired, this includes any beacon hints | |
1811 | * learned as we could have traveled outside to another country | |
1812 | * after disconnection. To restore regulatory settings we do | |
1813 | * exactly what we did at bootup: | |
1814 | * | |
1815 | * - send a core regulatory hint | |
1816 | * - send a user regulatory hint if applicable | |
1817 | * | |
1818 | * Device drivers that send a regulatory hint for a specific country | |
1819 | * keep their own regulatory domain on wiphy->regd so that does does | |
1820 | * not need to be remembered. | |
1821 | */ | |
1822 | static void restore_regulatory_settings(bool reset_user) | |
1823 | { | |
1824 | char alpha2[2]; | |
cee0bec5 | 1825 | char world_alpha2[2]; |
09d989d1 | 1826 | struct reg_beacon *reg_beacon, *btmp; |
14609555 LR |
1827 | struct regulatory_request *reg_request, *tmp; |
1828 | LIST_HEAD(tmp_reg_req_list); | |
5ce543d1 | 1829 | struct cfg80211_registered_device *rdev; |
09d989d1 | 1830 | |
5fe231e8 JB |
1831 | ASSERT_RTNL(); |
1832 | ||
2d319867 | 1833 | reset_regdomains(true, &world_regdom); |
09d989d1 LR |
1834 | restore_alpha2(alpha2, reset_user); |
1835 | ||
14609555 LR |
1836 | /* |
1837 | * If there's any pending requests we simply | |
1838 | * stash them to a temporary pending queue and | |
1839 | * add then after we've restored regulatory | |
1840 | * settings. | |
1841 | */ | |
1842 | spin_lock(®_requests_lock); | |
fea9bced JB |
1843 | list_for_each_entry_safe(reg_request, tmp, ®_requests_list, list) { |
1844 | if (reg_request->initiator != NL80211_REGDOM_SET_BY_USER) | |
1845 | continue; | |
1846 | list_move_tail(®_request->list, &tmp_reg_req_list); | |
14609555 LR |
1847 | } |
1848 | spin_unlock(®_requests_lock); | |
1849 | ||
09d989d1 LR |
1850 | /* Clear beacon hints */ |
1851 | spin_lock_bh(®_pending_beacons_lock); | |
fea9bced JB |
1852 | list_for_each_entry_safe(reg_beacon, btmp, ®_pending_beacons, list) { |
1853 | list_del(®_beacon->list); | |
1854 | kfree(reg_beacon); | |
09d989d1 LR |
1855 | } |
1856 | spin_unlock_bh(®_pending_beacons_lock); | |
1857 | ||
fea9bced JB |
1858 | list_for_each_entry_safe(reg_beacon, btmp, ®_beacon_list, list) { |
1859 | list_del(®_beacon->list); | |
1860 | kfree(reg_beacon); | |
09d989d1 LR |
1861 | } |
1862 | ||
1863 | /* First restore to the basic regulatory settings */ | |
379b82f4 JB |
1864 | world_alpha2[0] = cfg80211_world_regdom->alpha2[0]; |
1865 | world_alpha2[1] = cfg80211_world_regdom->alpha2[1]; | |
09d989d1 | 1866 | |
5ce543d1 RM |
1867 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) { |
1868 | if (rdev->wiphy.flags & WIPHY_FLAG_CUSTOM_REGULATORY) | |
1869 | restore_custom_reg_settings(&rdev->wiphy); | |
1870 | } | |
1871 | ||
cee0bec5 | 1872 | regulatory_hint_core(world_alpha2); |
09d989d1 LR |
1873 | |
1874 | /* | |
1875 | * This restores the ieee80211_regdom module parameter | |
1876 | * preference or the last user requested regulatory | |
1877 | * settings, user regulatory settings takes precedence. | |
1878 | */ | |
1879 | if (is_an_alpha2(alpha2)) | |
57b5ce07 | 1880 | regulatory_hint_user(user_alpha2, NL80211_USER_REG_HINT_USER); |
09d989d1 | 1881 | |
14609555 | 1882 | spin_lock(®_requests_lock); |
11cff96c | 1883 | list_splice_tail_init(&tmp_reg_req_list, ®_requests_list); |
14609555 LR |
1884 | spin_unlock(®_requests_lock); |
1885 | ||
14609555 LR |
1886 | REG_DBG_PRINT("Kicking the queue\n"); |
1887 | ||
1888 | schedule_work(®_work); | |
1889 | } | |
09d989d1 LR |
1890 | |
1891 | void regulatory_hint_disconnect(void) | |
1892 | { | |
1a919318 | 1893 | REG_DBG_PRINT("All devices are disconnected, going to restore regulatory settings\n"); |
09d989d1 LR |
1894 | restore_regulatory_settings(false); |
1895 | } | |
1896 | ||
e38f8a7a LR |
1897 | static bool freq_is_chan_12_13_14(u16 freq) |
1898 | { | |
59eb21a6 BR |
1899 | if (freq == ieee80211_channel_to_frequency(12, IEEE80211_BAND_2GHZ) || |
1900 | freq == ieee80211_channel_to_frequency(13, IEEE80211_BAND_2GHZ) || | |
1901 | freq == ieee80211_channel_to_frequency(14, IEEE80211_BAND_2GHZ)) | |
e38f8a7a LR |
1902 | return true; |
1903 | return false; | |
1904 | } | |
1905 | ||
3ebfa6e7 LR |
1906 | static bool pending_reg_beacon(struct ieee80211_channel *beacon_chan) |
1907 | { | |
1908 | struct reg_beacon *pending_beacon; | |
1909 | ||
1910 | list_for_each_entry(pending_beacon, ®_pending_beacons, list) | |
1911 | if (beacon_chan->center_freq == | |
1912 | pending_beacon->chan.center_freq) | |
1913 | return true; | |
1914 | return false; | |
1915 | } | |
1916 | ||
e38f8a7a LR |
1917 | int regulatory_hint_found_beacon(struct wiphy *wiphy, |
1918 | struct ieee80211_channel *beacon_chan, | |
1919 | gfp_t gfp) | |
1920 | { | |
1921 | struct reg_beacon *reg_beacon; | |
3ebfa6e7 | 1922 | bool processing; |
e38f8a7a | 1923 | |
1a919318 JB |
1924 | if (beacon_chan->beacon_found || |
1925 | beacon_chan->flags & IEEE80211_CHAN_RADAR || | |
e38f8a7a | 1926 | (beacon_chan->band == IEEE80211_BAND_2GHZ && |
1a919318 | 1927 | !freq_is_chan_12_13_14(beacon_chan->center_freq))) |
e38f8a7a LR |
1928 | return 0; |
1929 | ||
3ebfa6e7 LR |
1930 | spin_lock_bh(®_pending_beacons_lock); |
1931 | processing = pending_reg_beacon(beacon_chan); | |
1932 | spin_unlock_bh(®_pending_beacons_lock); | |
1933 | ||
1934 | if (processing) | |
e38f8a7a LR |
1935 | return 0; |
1936 | ||
1937 | reg_beacon = kzalloc(sizeof(struct reg_beacon), gfp); | |
1938 | if (!reg_beacon) | |
1939 | return -ENOMEM; | |
1940 | ||
1a919318 | 1941 | REG_DBG_PRINT("Found new beacon on frequency: %d MHz (Ch %d) on %s\n", |
4113f751 LR |
1942 | beacon_chan->center_freq, |
1943 | ieee80211_frequency_to_channel(beacon_chan->center_freq), | |
1944 | wiphy_name(wiphy)); | |
1945 | ||
e38f8a7a | 1946 | memcpy(®_beacon->chan, beacon_chan, |
1a919318 | 1947 | sizeof(struct ieee80211_channel)); |
e38f8a7a LR |
1948 | |
1949 | /* | |
1950 | * Since we can be called from BH or and non-BH context | |
1951 | * we must use spin_lock_bh() | |
1952 | */ | |
1953 | spin_lock_bh(®_pending_beacons_lock); | |
1954 | list_add_tail(®_beacon->list, ®_pending_beacons); | |
1955 | spin_unlock_bh(®_pending_beacons_lock); | |
1956 | ||
1957 | schedule_work(®_work); | |
1958 | ||
1959 | return 0; | |
1960 | } | |
1961 | ||
a3d2eaf0 | 1962 | static void print_rd_rules(const struct ieee80211_regdomain *rd) |
b2e1b302 LR |
1963 | { |
1964 | unsigned int i; | |
a3d2eaf0 JB |
1965 | const struct ieee80211_reg_rule *reg_rule = NULL; |
1966 | const struct ieee80211_freq_range *freq_range = NULL; | |
1967 | const struct ieee80211_power_rule *power_rule = NULL; | |
b2e1b302 | 1968 | |
6653325a | 1969 | pr_info(" (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)\n"); |
b2e1b302 LR |
1970 | |
1971 | for (i = 0; i < rd->n_reg_rules; i++) { | |
1972 | reg_rule = &rd->reg_rules[i]; | |
1973 | freq_range = ®_rule->freq_range; | |
1974 | power_rule = ®_rule->power_rule; | |
1975 | ||
fb1fc7ad LR |
1976 | /* |
1977 | * There may not be documentation for max antenna gain | |
1978 | * in certain regions | |
1979 | */ | |
b2e1b302 | 1980 | if (power_rule->max_antenna_gain) |
6653325a | 1981 | pr_info(" (%d KHz - %d KHz @ %d KHz), (%d mBi, %d mBm)\n", |
b2e1b302 LR |
1982 | freq_range->start_freq_khz, |
1983 | freq_range->end_freq_khz, | |
1984 | freq_range->max_bandwidth_khz, | |
1985 | power_rule->max_antenna_gain, | |
1986 | power_rule->max_eirp); | |
1987 | else | |
6653325a | 1988 | pr_info(" (%d KHz - %d KHz @ %d KHz), (N/A, %d mBm)\n", |
b2e1b302 LR |
1989 | freq_range->start_freq_khz, |
1990 | freq_range->end_freq_khz, | |
1991 | freq_range->max_bandwidth_khz, | |
1992 | power_rule->max_eirp); | |
1993 | } | |
1994 | } | |
1995 | ||
8b60b078 LR |
1996 | bool reg_supported_dfs_region(u8 dfs_region) |
1997 | { | |
1998 | switch (dfs_region) { | |
1999 | case NL80211_DFS_UNSET: | |
2000 | case NL80211_DFS_FCC: | |
2001 | case NL80211_DFS_ETSI: | |
2002 | case NL80211_DFS_JP: | |
2003 | return true; | |
2004 | default: | |
2005 | REG_DBG_PRINT("Ignoring uknown DFS master region: %d\n", | |
2006 | dfs_region); | |
2007 | return false; | |
2008 | } | |
2009 | } | |
2010 | ||
2011 | static void print_dfs_region(u8 dfs_region) | |
2012 | { | |
2013 | if (!dfs_region) | |
2014 | return; | |
2015 | ||
2016 | switch (dfs_region) { | |
2017 | case NL80211_DFS_FCC: | |
2018 | pr_info(" DFS Master region FCC"); | |
2019 | break; | |
2020 | case NL80211_DFS_ETSI: | |
2021 | pr_info(" DFS Master region ETSI"); | |
2022 | break; | |
2023 | case NL80211_DFS_JP: | |
2024 | pr_info(" DFS Master region JP"); | |
2025 | break; | |
2026 | default: | |
1a919318 | 2027 | pr_info(" DFS Master region Unknown"); |
8b60b078 LR |
2028 | break; |
2029 | } | |
2030 | } | |
2031 | ||
a3d2eaf0 | 2032 | static void print_regdomain(const struct ieee80211_regdomain *rd) |
b2e1b302 | 2033 | { |
c492db37 | 2034 | struct regulatory_request *lr = get_last_request(); |
b2e1b302 | 2035 | |
3f2355cb | 2036 | if (is_intersected_alpha2(rd->alpha2)) { |
c492db37 | 2037 | if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) { |
79c97e97 | 2038 | struct cfg80211_registered_device *rdev; |
c492db37 | 2039 | rdev = cfg80211_rdev_by_wiphy_idx(lr->wiphy_idx); |
79c97e97 | 2040 | if (rdev) { |
e9c0268f | 2041 | pr_info("Current regulatory domain updated by AP to: %c%c\n", |
79c97e97 JB |
2042 | rdev->country_ie_alpha2[0], |
2043 | rdev->country_ie_alpha2[1]); | |
3f2355cb | 2044 | } else |
e9c0268f | 2045 | pr_info("Current regulatory domain intersected:\n"); |
3f2355cb | 2046 | } else |
e9c0268f | 2047 | pr_info("Current regulatory domain intersected:\n"); |
1a919318 | 2048 | } else if (is_world_regdom(rd->alpha2)) { |
e9c0268f | 2049 | pr_info("World regulatory domain updated:\n"); |
1a919318 | 2050 | } else { |
b2e1b302 | 2051 | if (is_unknown_alpha2(rd->alpha2)) |
e9c0268f | 2052 | pr_info("Regulatory domain changed to driver built-in settings (unknown country)\n"); |
57b5ce07 | 2053 | else { |
c492db37 | 2054 | if (reg_request_cell_base(lr)) |
1a919318 | 2055 | pr_info("Regulatory domain changed to country: %c%c by Cell Station\n", |
57b5ce07 LR |
2056 | rd->alpha2[0], rd->alpha2[1]); |
2057 | else | |
1a919318 | 2058 | pr_info("Regulatory domain changed to country: %c%c\n", |
57b5ce07 LR |
2059 | rd->alpha2[0], rd->alpha2[1]); |
2060 | } | |
b2e1b302 | 2061 | } |
1a919318 | 2062 | |
8b60b078 | 2063 | print_dfs_region(rd->dfs_region); |
b2e1b302 LR |
2064 | print_rd_rules(rd); |
2065 | } | |
2066 | ||
2df78167 | 2067 | static void print_regdomain_info(const struct ieee80211_regdomain *rd) |
b2e1b302 | 2068 | { |
e9c0268f | 2069 | pr_info("Regulatory domain: %c%c\n", rd->alpha2[0], rd->alpha2[1]); |
b2e1b302 LR |
2070 | print_rd_rules(rd); |
2071 | } | |
2072 | ||
d2372b31 | 2073 | /* Takes ownership of rd only if it doesn't fail */ |
a3d2eaf0 | 2074 | static int __set_regdom(const struct ieee80211_regdomain *rd) |
b2e1b302 | 2075 | { |
e9763c3c | 2076 | const struct ieee80211_regdomain *regd; |
9c96477d | 2077 | const struct ieee80211_regdomain *intersected_rd = NULL; |
806a9e39 | 2078 | struct wiphy *request_wiphy; |
c492db37 | 2079 | struct regulatory_request *lr = get_last_request(); |
6913b49a | 2080 | |
b2e1b302 LR |
2081 | /* Some basic sanity checks first */ |
2082 | ||
6913b49a JB |
2083 | if (!reg_is_valid_request(rd->alpha2)) |
2084 | return -EINVAL; | |
2085 | ||
b2e1b302 | 2086 | if (is_world_regdom(rd->alpha2)) { |
b2e1b302 LR |
2087 | update_world_regdomain(rd); |
2088 | return 0; | |
2089 | } | |
b2e1b302 LR |
2090 | |
2091 | if (!is_alpha2_set(rd->alpha2) && !is_an_alpha2(rd->alpha2) && | |
1a919318 | 2092 | !is_unknown_alpha2(rd->alpha2)) |
b2e1b302 LR |
2093 | return -EINVAL; |
2094 | ||
fb1fc7ad LR |
2095 | /* |
2096 | * Lets only bother proceeding on the same alpha2 if the current | |
3f2355cb | 2097 | * rd is non static (it means CRDA was present and was used last) |
fb1fc7ad LR |
2098 | * and the pending request came in from a country IE |
2099 | */ | |
c492db37 | 2100 | if (lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE) { |
fb1fc7ad LR |
2101 | /* |
2102 | * If someone else asked us to change the rd lets only bother | |
2103 | * checking if the alpha2 changes if CRDA was already called | |
2104 | */ | |
baeb66fe | 2105 | if (!regdom_changes(rd->alpha2)) |
95908535 | 2106 | return -EALREADY; |
3f2355cb LR |
2107 | } |
2108 | ||
fb1fc7ad LR |
2109 | /* |
2110 | * Now lets set the regulatory domain, update all driver channels | |
b2e1b302 LR |
2111 | * and finally inform them of what we have done, in case they want |
2112 | * to review or adjust their own settings based on their own | |
fb1fc7ad LR |
2113 | * internal EEPROM data |
2114 | */ | |
b2e1b302 | 2115 | |
8375af3b | 2116 | if (!is_valid_rd(rd)) { |
e9c0268f | 2117 | pr_err("Invalid regulatory domain detected:\n"); |
8375af3b LR |
2118 | print_regdomain_info(rd); |
2119 | return -EINVAL; | |
b2e1b302 LR |
2120 | } |
2121 | ||
c492db37 | 2122 | request_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx); |
0bac71af | 2123 | if (!request_wiphy && |
c492db37 JB |
2124 | (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER || |
2125 | lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE)) { | |
0bac71af | 2126 | schedule_delayed_work(®_timeout, 0); |
de3584bd JB |
2127 | return -ENODEV; |
2128 | } | |
806a9e39 | 2129 | |
c492db37 JB |
2130 | if (!lr->intersect) { |
2131 | if (lr->initiator != NL80211_REGDOM_SET_BY_DRIVER) { | |
379b82f4 | 2132 | reset_regdomains(false, rd); |
3e0c3ff3 LR |
2133 | return 0; |
2134 | } | |
2135 | ||
fb1fc7ad LR |
2136 | /* |
2137 | * For a driver hint, lets copy the regulatory domain the | |
2138 | * driver wanted to the wiphy to deal with conflicts | |
2139 | */ | |
3e0c3ff3 | 2140 | |
558f6d32 LR |
2141 | /* |
2142 | * Userspace could have sent two replies with only | |
2143 | * one kernel request. | |
2144 | */ | |
2145 | if (request_wiphy->regd) | |
2146 | return -EALREADY; | |
3e0c3ff3 | 2147 | |
e9763c3c JB |
2148 | regd = reg_copy_regd(rd); |
2149 | if (IS_ERR(regd)) | |
2150 | return PTR_ERR(regd); | |
3e0c3ff3 | 2151 | |
458f4f9e | 2152 | rcu_assign_pointer(request_wiphy->regd, regd); |
379b82f4 | 2153 | reset_regdomains(false, rd); |
b8295acd LR |
2154 | return 0; |
2155 | } | |
2156 | ||
2157 | /* Intersection requires a bit more work */ | |
2158 | ||
c492db37 | 2159 | if (lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE) { |
458f4f9e | 2160 | intersected_rd = regdom_intersect(rd, get_cfg80211_regdom()); |
9c96477d LR |
2161 | if (!intersected_rd) |
2162 | return -EINVAL; | |
b8295acd | 2163 | |
fb1fc7ad LR |
2164 | /* |
2165 | * We can trash what CRDA provided now. | |
3e0c3ff3 | 2166 | * However if a driver requested this specific regulatory |
fb1fc7ad LR |
2167 | * domain we keep it for its private use |
2168 | */ | |
b7566fc3 LF |
2169 | if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER) { |
2170 | const struct ieee80211_regdomain *tmp; | |
2171 | ||
2172 | tmp = get_wiphy_regdom(request_wiphy); | |
458f4f9e | 2173 | rcu_assign_pointer(request_wiphy->regd, rd); |
b7566fc3 LF |
2174 | rcu_free_regdom(tmp); |
2175 | } else { | |
3e0c3ff3 | 2176 | kfree(rd); |
b7566fc3 | 2177 | } |
3e0c3ff3 | 2178 | |
b8295acd LR |
2179 | rd = NULL; |
2180 | ||
379b82f4 | 2181 | reset_regdomains(false, intersected_rd); |
b8295acd LR |
2182 | |
2183 | return 0; | |
9c96477d LR |
2184 | } |
2185 | ||
f3baed51 | 2186 | return -EINVAL; |
b2e1b302 LR |
2187 | } |
2188 | ||
2189 | ||
fb1fc7ad LR |
2190 | /* |
2191 | * Use this call to set the current regulatory domain. Conflicts with | |
b2e1b302 | 2192 | * multiple drivers can be ironed out later. Caller must've already |
458f4f9e | 2193 | * kmalloc'd the rd structure. |
fb1fc7ad | 2194 | */ |
a3d2eaf0 | 2195 | int set_regdom(const struct ieee80211_regdomain *rd) |
b2e1b302 | 2196 | { |
c492db37 | 2197 | struct regulatory_request *lr; |
b2e1b302 LR |
2198 | int r; |
2199 | ||
c492db37 | 2200 | lr = get_last_request(); |
abc7381b | 2201 | |
b2e1b302 LR |
2202 | /* Note that this doesn't update the wiphys, this is done below */ |
2203 | r = __set_regdom(rd); | |
d2372b31 | 2204 | if (r) { |
95908535 KV |
2205 | if (r == -EALREADY) |
2206 | reg_set_request_processed(); | |
2207 | ||
d2372b31 | 2208 | kfree(rd); |
38fd2143 | 2209 | return r; |
d2372b31 | 2210 | } |
b2e1b302 | 2211 | |
b2e1b302 | 2212 | /* This would make this whole thing pointless */ |
38fd2143 JB |
2213 | if (WARN_ON(!lr->intersect && rd != get_cfg80211_regdom())) |
2214 | return -EINVAL; | |
b2e1b302 LR |
2215 | |
2216 | /* update all wiphys now with the new established regulatory domain */ | |
c492db37 | 2217 | update_all_wiphy_regulatory(lr->initiator); |
b2e1b302 | 2218 | |
458f4f9e | 2219 | print_regdomain(get_cfg80211_regdom()); |
b2e1b302 | 2220 | |
c492db37 | 2221 | nl80211_send_reg_change_event(lr); |
73d54c9e | 2222 | |
b2e253cf LR |
2223 | reg_set_request_processed(); |
2224 | ||
38fd2143 | 2225 | return 0; |
b2e1b302 LR |
2226 | } |
2227 | ||
4d9d88d1 SJR |
2228 | int reg_device_uevent(struct device *dev, struct kobj_uevent_env *env) |
2229 | { | |
4a484cff JB |
2230 | struct regulatory_request *lr; |
2231 | u8 alpha2[2]; | |
2232 | bool add = false; | |
c492db37 | 2233 | |
4a484cff JB |
2234 | rcu_read_lock(); |
2235 | lr = get_last_request(); | |
c492db37 | 2236 | if (lr && !lr->processed) { |
4a484cff JB |
2237 | memcpy(alpha2, lr->alpha2, 2); |
2238 | add = true; | |
4d9d88d1 | 2239 | } |
4a484cff | 2240 | rcu_read_unlock(); |
4d9d88d1 | 2241 | |
4a484cff JB |
2242 | if (add) |
2243 | return add_uevent_var(env, "COUNTRY=%c%c", | |
2244 | alpha2[0], alpha2[1]); | |
4d9d88d1 SJR |
2245 | return 0; |
2246 | } | |
4d9d88d1 | 2247 | |
57b5ce07 LR |
2248 | void wiphy_regulatory_register(struct wiphy *wiphy) |
2249 | { | |
57b5ce07 LR |
2250 | if (!reg_dev_ignore_cell_hint(wiphy)) |
2251 | reg_num_devs_support_basehint++; | |
2252 | ||
14cdf112 | 2253 | wiphy_update_regulatory(wiphy, NL80211_REGDOM_SET_BY_CORE); |
57b5ce07 LR |
2254 | } |
2255 | ||
bfead080 | 2256 | void wiphy_regulatory_deregister(struct wiphy *wiphy) |
3f2355cb | 2257 | { |
0ad8acaf | 2258 | struct wiphy *request_wiphy = NULL; |
c492db37 | 2259 | struct regulatory_request *lr; |
761cf7ec | 2260 | |
c492db37 | 2261 | lr = get_last_request(); |
abc7381b | 2262 | |
57b5ce07 LR |
2263 | if (!reg_dev_ignore_cell_hint(wiphy)) |
2264 | reg_num_devs_support_basehint--; | |
2265 | ||
458f4f9e JB |
2266 | rcu_free_regdom(get_wiphy_regdom(wiphy)); |
2267 | rcu_assign_pointer(wiphy->regd, NULL); | |
0ef9ccdd | 2268 | |
c492db37 JB |
2269 | if (lr) |
2270 | request_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx); | |
806a9e39 | 2271 | |
0ef9ccdd | 2272 | if (!request_wiphy || request_wiphy != wiphy) |
38fd2143 | 2273 | return; |
0ef9ccdd | 2274 | |
c492db37 JB |
2275 | lr->wiphy_idx = WIPHY_IDX_INVALID; |
2276 | lr->country_ie_env = ENVIRON_ANY; | |
3f2355cb LR |
2277 | } |
2278 | ||
a90c7a31 LR |
2279 | static void reg_timeout_work(struct work_struct *work) |
2280 | { | |
1a919318 | 2281 | REG_DBG_PRINT("Timeout while waiting for CRDA to reply, restoring regulatory settings\n"); |
a90c7a31 LR |
2282 | restore_regulatory_settings(true); |
2283 | } | |
2284 | ||
2fcc9f73 | 2285 | int __init regulatory_init(void) |
b2e1b302 | 2286 | { |
bcf4f99b | 2287 | int err = 0; |
734366de | 2288 | |
b2e1b302 LR |
2289 | reg_pdev = platform_device_register_simple("regulatory", 0, NULL, 0); |
2290 | if (IS_ERR(reg_pdev)) | |
2291 | return PTR_ERR(reg_pdev); | |
734366de | 2292 | |
4d9d88d1 SJR |
2293 | reg_pdev->dev.type = ®_device_type; |
2294 | ||
fe33eb39 | 2295 | spin_lock_init(®_requests_lock); |
e38f8a7a | 2296 | spin_lock_init(®_pending_beacons_lock); |
fe33eb39 | 2297 | |
80007efe LR |
2298 | reg_regdb_size_check(); |
2299 | ||
458f4f9e | 2300 | rcu_assign_pointer(cfg80211_regdomain, cfg80211_world_regdom); |
734366de | 2301 | |
09d989d1 LR |
2302 | user_alpha2[0] = '9'; |
2303 | user_alpha2[1] = '7'; | |
2304 | ||
ae9e4b0d | 2305 | /* We always try to get an update for the static regdomain */ |
458f4f9e | 2306 | err = regulatory_hint_core(cfg80211_world_regdom->alpha2); |
ba25c141 | 2307 | if (err) { |
bcf4f99b LR |
2308 | if (err == -ENOMEM) |
2309 | return err; | |
2310 | /* | |
2311 | * N.B. kobject_uevent_env() can fail mainly for when we're out | |
2312 | * memory which is handled and propagated appropriately above | |
2313 | * but it can also fail during a netlink_broadcast() or during | |
2314 | * early boot for call_usermodehelper(). For now treat these | |
2315 | * errors as non-fatal. | |
2316 | */ | |
e9c0268f | 2317 | pr_err("kobject_uevent_env() was unable to call CRDA during init\n"); |
bcf4f99b | 2318 | } |
734366de | 2319 | |
ae9e4b0d LR |
2320 | /* |
2321 | * Finally, if the user set the module parameter treat it | |
2322 | * as a user hint. | |
2323 | */ | |
2324 | if (!is_world_regdom(ieee80211_regdom)) | |
57b5ce07 LR |
2325 | regulatory_hint_user(ieee80211_regdom, |
2326 | NL80211_USER_REG_HINT_USER); | |
ae9e4b0d | 2327 | |
b2e1b302 LR |
2328 | return 0; |
2329 | } | |
2330 | ||
1a919318 | 2331 | void regulatory_exit(void) |
b2e1b302 | 2332 | { |
fe33eb39 | 2333 | struct regulatory_request *reg_request, *tmp; |
e38f8a7a | 2334 | struct reg_beacon *reg_beacon, *btmp; |
fe33eb39 LR |
2335 | |
2336 | cancel_work_sync(®_work); | |
a90c7a31 | 2337 | cancel_delayed_work_sync(®_timeout); |
fe33eb39 | 2338 | |
9027b149 | 2339 | /* Lock to suppress warnings */ |
38fd2143 | 2340 | rtnl_lock(); |
379b82f4 | 2341 | reset_regdomains(true, NULL); |
38fd2143 | 2342 | rtnl_unlock(); |
734366de | 2343 | |
58ebacc6 | 2344 | dev_set_uevent_suppress(®_pdev->dev, true); |
f6037d09 | 2345 | |
b2e1b302 | 2346 | platform_device_unregister(reg_pdev); |
734366de | 2347 | |
fea9bced JB |
2348 | list_for_each_entry_safe(reg_beacon, btmp, ®_pending_beacons, list) { |
2349 | list_del(®_beacon->list); | |
2350 | kfree(reg_beacon); | |
e38f8a7a | 2351 | } |
e38f8a7a | 2352 | |
fea9bced JB |
2353 | list_for_each_entry_safe(reg_beacon, btmp, ®_beacon_list, list) { |
2354 | list_del(®_beacon->list); | |
2355 | kfree(reg_beacon); | |
e38f8a7a LR |
2356 | } |
2357 | ||
fea9bced JB |
2358 | list_for_each_entry_safe(reg_request, tmp, ®_requests_list, list) { |
2359 | list_del(®_request->list); | |
2360 | kfree(reg_request); | |
fe33eb39 | 2361 | } |
8318d78a | 2362 | } |