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 */ | |
131a19bc | 175 | REG_RULE(5180-10, 5240+10, 160, 6, 20, |
611b6a82 LR |
176 | NL80211_RRF_PASSIVE_SCAN | |
177 | NL80211_RRF_NO_IBSS), | |
3fc71f77 | 178 | |
131a19bc JB |
179 | /* IEEE 802.11a, channel 52..64 - DFS required */ |
180 | REG_RULE(5260-10, 5320+10, 160, 6, 20, | |
181 | NL80211_RRF_PASSIVE_SCAN | | |
182 | NL80211_RRF_NO_IBSS | | |
183 | NL80211_RRF_DFS), | |
184 | ||
185 | /* IEEE 802.11a, channel 100..144 - DFS required */ | |
186 | REG_RULE(5500-10, 5720+10, 160, 6, 20, | |
187 | NL80211_RRF_PASSIVE_SCAN | | |
188 | NL80211_RRF_NO_IBSS | | |
189 | NL80211_RRF_DFS), | |
3fc71f77 LR |
190 | |
191 | /* IEEE 802.11a, channel 149..165 */ | |
8ab9d85c | 192 | REG_RULE(5745-10, 5825+10, 80, 6, 20, |
3fc71f77 LR |
193 | NL80211_RRF_PASSIVE_SCAN | |
194 | NL80211_RRF_NO_IBSS), | |
90cdc6df VK |
195 | |
196 | /* IEEE 802.11ad (60gHz), channels 1..3 */ | |
197 | REG_RULE(56160+2160*1-1080, 56160+2160*3+1080, 2160, 0, 0, 0), | |
734366de JB |
198 | } |
199 | }; | |
200 | ||
38fd2143 | 201 | /* protected by RTNL */ |
a3d2eaf0 JB |
202 | static const struct ieee80211_regdomain *cfg80211_world_regdom = |
203 | &world_regdom; | |
734366de | 204 | |
6ee7d330 | 205 | static char *ieee80211_regdom = "00"; |
09d989d1 | 206 | static char user_alpha2[2]; |
6ee7d330 | 207 | |
734366de JB |
208 | module_param(ieee80211_regdom, charp, 0444); |
209 | MODULE_PARM_DESC(ieee80211_regdom, "IEEE 802.11 regulatory domain code"); | |
210 | ||
379b82f4 JB |
211 | static void reset_regdomains(bool full_reset, |
212 | const struct ieee80211_regdomain *new_regdom) | |
734366de | 213 | { |
458f4f9e | 214 | const struct ieee80211_regdomain *r; |
c492db37 | 215 | struct regulatory_request *lr; |
458f4f9e | 216 | |
38fd2143 | 217 | ASSERT_RTNL(); |
e8da2bb4 | 218 | |
458f4f9e JB |
219 | r = get_cfg80211_regdom(); |
220 | ||
942b25cf | 221 | /* avoid freeing static information or freeing something twice */ |
458f4f9e JB |
222 | if (r == cfg80211_world_regdom) |
223 | r = NULL; | |
942b25cf JB |
224 | if (cfg80211_world_regdom == &world_regdom) |
225 | cfg80211_world_regdom = NULL; | |
458f4f9e JB |
226 | if (r == &world_regdom) |
227 | r = NULL; | |
942b25cf | 228 | |
458f4f9e JB |
229 | rcu_free_regdom(r); |
230 | rcu_free_regdom(cfg80211_world_regdom); | |
734366de | 231 | |
a3d2eaf0 | 232 | cfg80211_world_regdom = &world_regdom; |
458f4f9e | 233 | rcu_assign_pointer(cfg80211_regdomain, new_regdom); |
a042994d LR |
234 | |
235 | if (!full_reset) | |
236 | return; | |
237 | ||
c492db37 JB |
238 | lr = get_last_request(); |
239 | if (lr != &core_request_world && lr) | |
240 | kfree_rcu(lr, rcu_head); | |
241 | rcu_assign_pointer(last_request, &core_request_world); | |
734366de JB |
242 | } |
243 | ||
fb1fc7ad LR |
244 | /* |
245 | * Dynamic world regulatory domain requested by the wireless | |
246 | * core upon initialization | |
247 | */ | |
a3d2eaf0 | 248 | static void update_world_regdomain(const struct ieee80211_regdomain *rd) |
734366de | 249 | { |
c492db37 | 250 | struct regulatory_request *lr; |
734366de | 251 | |
c492db37 JB |
252 | lr = get_last_request(); |
253 | ||
254 | WARN_ON(!lr); | |
734366de | 255 | |
379b82f4 | 256 | reset_regdomains(false, rd); |
734366de JB |
257 | |
258 | cfg80211_world_regdom = rd; | |
734366de | 259 | } |
734366de | 260 | |
a3d2eaf0 | 261 | bool is_world_regdom(const char *alpha2) |
b2e1b302 LR |
262 | { |
263 | if (!alpha2) | |
264 | return false; | |
1a919318 | 265 | return alpha2[0] == '0' && alpha2[1] == '0'; |
b2e1b302 | 266 | } |
8318d78a | 267 | |
a3d2eaf0 | 268 | static bool is_alpha2_set(const char *alpha2) |
b2e1b302 LR |
269 | { |
270 | if (!alpha2) | |
271 | return false; | |
1a919318 | 272 | return alpha2[0] && alpha2[1]; |
b2e1b302 | 273 | } |
8318d78a | 274 | |
a3d2eaf0 | 275 | static bool is_unknown_alpha2(const char *alpha2) |
b2e1b302 LR |
276 | { |
277 | if (!alpha2) | |
278 | return false; | |
fb1fc7ad LR |
279 | /* |
280 | * Special case where regulatory domain was built by driver | |
281 | * but a specific alpha2 cannot be determined | |
282 | */ | |
1a919318 | 283 | return alpha2[0] == '9' && alpha2[1] == '9'; |
b2e1b302 | 284 | } |
8318d78a | 285 | |
3f2355cb LR |
286 | static bool is_intersected_alpha2(const char *alpha2) |
287 | { | |
288 | if (!alpha2) | |
289 | return false; | |
fb1fc7ad LR |
290 | /* |
291 | * Special case where regulatory domain is the | |
3f2355cb | 292 | * result of an intersection between two regulatory domain |
fb1fc7ad LR |
293 | * structures |
294 | */ | |
1a919318 | 295 | return alpha2[0] == '9' && alpha2[1] == '8'; |
3f2355cb LR |
296 | } |
297 | ||
a3d2eaf0 | 298 | static bool is_an_alpha2(const char *alpha2) |
b2e1b302 LR |
299 | { |
300 | if (!alpha2) | |
301 | return false; | |
1a919318 | 302 | return isalpha(alpha2[0]) && isalpha(alpha2[1]); |
b2e1b302 | 303 | } |
8318d78a | 304 | |
a3d2eaf0 | 305 | static bool alpha2_equal(const char *alpha2_x, const char *alpha2_y) |
b2e1b302 LR |
306 | { |
307 | if (!alpha2_x || !alpha2_y) | |
308 | return false; | |
1a919318 | 309 | return alpha2_x[0] == alpha2_y[0] && alpha2_x[1] == alpha2_y[1]; |
b2e1b302 LR |
310 | } |
311 | ||
69b1572b | 312 | static bool regdom_changes(const char *alpha2) |
b2e1b302 | 313 | { |
458f4f9e | 314 | const struct ieee80211_regdomain *r = get_cfg80211_regdom(); |
761cf7ec | 315 | |
458f4f9e | 316 | if (!r) |
b2e1b302 | 317 | return true; |
458f4f9e | 318 | return !alpha2_equal(r->alpha2, alpha2); |
b2e1b302 LR |
319 | } |
320 | ||
09d989d1 LR |
321 | /* |
322 | * The NL80211_REGDOM_SET_BY_USER regdom alpha2 is cached, this lets | |
323 | * you know if a valid regulatory hint with NL80211_REGDOM_SET_BY_USER | |
324 | * has ever been issued. | |
325 | */ | |
326 | static bool is_user_regdom_saved(void) | |
327 | { | |
328 | if (user_alpha2[0] == '9' && user_alpha2[1] == '7') | |
329 | return false; | |
330 | ||
331 | /* This would indicate a mistake on the design */ | |
1a919318 | 332 | if (WARN(!is_world_regdom(user_alpha2) && !is_an_alpha2(user_alpha2), |
09d989d1 | 333 | "Unexpected user alpha2: %c%c\n", |
1a919318 | 334 | user_alpha2[0], user_alpha2[1])) |
09d989d1 LR |
335 | return false; |
336 | ||
337 | return true; | |
338 | } | |
339 | ||
e9763c3c JB |
340 | static const struct ieee80211_regdomain * |
341 | reg_copy_regd(const struct ieee80211_regdomain *src_regd) | |
3b377ea9 JL |
342 | { |
343 | struct ieee80211_regdomain *regd; | |
e9763c3c | 344 | int size_of_regd; |
3b377ea9 JL |
345 | unsigned int i; |
346 | ||
82f20856 JB |
347 | size_of_regd = |
348 | sizeof(struct ieee80211_regdomain) + | |
349 | src_regd->n_reg_rules * sizeof(struct ieee80211_reg_rule); | |
3b377ea9 JL |
350 | |
351 | regd = kzalloc(size_of_regd, GFP_KERNEL); | |
352 | if (!regd) | |
e9763c3c | 353 | return ERR_PTR(-ENOMEM); |
3b377ea9 JL |
354 | |
355 | memcpy(regd, src_regd, sizeof(struct ieee80211_regdomain)); | |
356 | ||
357 | for (i = 0; i < src_regd->n_reg_rules; i++) | |
358 | memcpy(®d->reg_rules[i], &src_regd->reg_rules[i], | |
e9763c3c | 359 | sizeof(struct ieee80211_reg_rule)); |
3b377ea9 | 360 | |
e9763c3c | 361 | return regd; |
3b377ea9 JL |
362 | } |
363 | ||
364 | #ifdef CONFIG_CFG80211_INTERNAL_REGDB | |
365 | struct reg_regdb_search_request { | |
366 | char alpha2[2]; | |
367 | struct list_head list; | |
368 | }; | |
369 | ||
370 | static LIST_HEAD(reg_regdb_search_list); | |
368d06f5 | 371 | static DEFINE_MUTEX(reg_regdb_search_mutex); |
3b377ea9 JL |
372 | |
373 | static void reg_regdb_search(struct work_struct *work) | |
374 | { | |
375 | struct reg_regdb_search_request *request; | |
e9763c3c JB |
376 | const struct ieee80211_regdomain *curdom, *regdom = NULL; |
377 | int i; | |
a85d0d7f | 378 | |
5fe231e8 | 379 | rtnl_lock(); |
3b377ea9 | 380 | |
368d06f5 | 381 | mutex_lock(®_regdb_search_mutex); |
3b377ea9 JL |
382 | while (!list_empty(®_regdb_search_list)) { |
383 | request = list_first_entry(®_regdb_search_list, | |
384 | struct reg_regdb_search_request, | |
385 | list); | |
386 | list_del(&request->list); | |
387 | ||
1a919318 | 388 | for (i = 0; i < reg_regdb_size; i++) { |
3b377ea9 JL |
389 | curdom = reg_regdb[i]; |
390 | ||
1a919318 | 391 | if (alpha2_equal(request->alpha2, curdom->alpha2)) { |
e9763c3c | 392 | regdom = reg_copy_regd(curdom); |
3b377ea9 JL |
393 | break; |
394 | } | |
395 | } | |
396 | ||
397 | kfree(request); | |
398 | } | |
368d06f5 | 399 | mutex_unlock(®_regdb_search_mutex); |
a85d0d7f | 400 | |
e9763c3c | 401 | if (!IS_ERR_OR_NULL(regdom)) |
a85d0d7f LR |
402 | set_regdom(regdom); |
403 | ||
5fe231e8 | 404 | rtnl_unlock(); |
3b377ea9 JL |
405 | } |
406 | ||
407 | static DECLARE_WORK(reg_regdb_work, reg_regdb_search); | |
408 | ||
409 | static void reg_regdb_query(const char *alpha2) | |
410 | { | |
411 | struct reg_regdb_search_request *request; | |
412 | ||
413 | if (!alpha2) | |
414 | return; | |
415 | ||
416 | request = kzalloc(sizeof(struct reg_regdb_search_request), GFP_KERNEL); | |
417 | if (!request) | |
418 | return; | |
419 | ||
420 | memcpy(request->alpha2, alpha2, 2); | |
421 | ||
368d06f5 | 422 | mutex_lock(®_regdb_search_mutex); |
3b377ea9 | 423 | list_add_tail(&request->list, ®_regdb_search_list); |
368d06f5 | 424 | mutex_unlock(®_regdb_search_mutex); |
3b377ea9 JL |
425 | |
426 | schedule_work(®_regdb_work); | |
427 | } | |
80007efe LR |
428 | |
429 | /* Feel free to add any other sanity checks here */ | |
430 | static void reg_regdb_size_check(void) | |
431 | { | |
432 | /* We should ideally BUILD_BUG_ON() but then random builds would fail */ | |
433 | WARN_ONCE(!reg_regdb_size, "db.txt is empty, you should update it..."); | |
434 | } | |
3b377ea9 | 435 | #else |
80007efe | 436 | static inline void reg_regdb_size_check(void) {} |
3b377ea9 JL |
437 | static inline void reg_regdb_query(const char *alpha2) {} |
438 | #endif /* CONFIG_CFG80211_INTERNAL_REGDB */ | |
439 | ||
fb1fc7ad LR |
440 | /* |
441 | * This lets us keep regulatory code which is updated on a regulatory | |
4d9d88d1 SJR |
442 | * basis in userspace. Country information is filled in by |
443 | * reg_device_uevent | |
fb1fc7ad | 444 | */ |
b2e1b302 LR |
445 | static int call_crda(const char *alpha2) |
446 | { | |
b2e1b302 | 447 | if (!is_world_regdom((char *) alpha2)) |
e9c0268f | 448 | pr_info("Calling CRDA for country: %c%c\n", |
b2e1b302 LR |
449 | alpha2[0], alpha2[1]); |
450 | else | |
e9c0268f | 451 | pr_info("Calling CRDA to update world regulatory domain\n"); |
b2e1b302 | 452 | |
3b377ea9 JL |
453 | /* query internal regulatory database (if it exists) */ |
454 | reg_regdb_query(alpha2); | |
455 | ||
4d9d88d1 | 456 | return kobject_uevent(®_pdev->dev.kobj, KOBJ_CHANGE); |
b2e1b302 LR |
457 | } |
458 | ||
6913b49a | 459 | static bool reg_is_valid_request(const char *alpha2) |
b2e1b302 | 460 | { |
c492db37 | 461 | struct regulatory_request *lr = get_last_request(); |
61405e97 | 462 | |
c492db37 | 463 | if (!lr || lr->processed) |
f6037d09 JB |
464 | return false; |
465 | ||
c492db37 | 466 | return alpha2_equal(lr->alpha2, alpha2); |
b2e1b302 | 467 | } |
8318d78a | 468 | |
b2e1b302 | 469 | /* Sanity check on a regulatory rule */ |
a3d2eaf0 | 470 | static bool is_valid_reg_rule(const struct ieee80211_reg_rule *rule) |
8318d78a | 471 | { |
a3d2eaf0 | 472 | const struct ieee80211_freq_range *freq_range = &rule->freq_range; |
b2e1b302 LR |
473 | u32 freq_diff; |
474 | ||
91e99004 | 475 | if (freq_range->start_freq_khz <= 0 || freq_range->end_freq_khz <= 0) |
b2e1b302 LR |
476 | return false; |
477 | ||
478 | if (freq_range->start_freq_khz > freq_range->end_freq_khz) | |
479 | return false; | |
480 | ||
481 | freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz; | |
482 | ||
bd05f28e | 483 | if (freq_range->end_freq_khz <= freq_range->start_freq_khz || |
1a919318 | 484 | freq_range->max_bandwidth_khz > freq_diff) |
b2e1b302 LR |
485 | return false; |
486 | ||
487 | return true; | |
488 | } | |
489 | ||
a3d2eaf0 | 490 | static bool is_valid_rd(const struct ieee80211_regdomain *rd) |
b2e1b302 | 491 | { |
a3d2eaf0 | 492 | const struct ieee80211_reg_rule *reg_rule = NULL; |
b2e1b302 | 493 | unsigned int i; |
8318d78a | 494 | |
b2e1b302 LR |
495 | if (!rd->n_reg_rules) |
496 | return false; | |
8318d78a | 497 | |
88dc1c3f LR |
498 | if (WARN_ON(rd->n_reg_rules > NL80211_MAX_SUPP_REG_RULES)) |
499 | return false; | |
500 | ||
b2e1b302 LR |
501 | for (i = 0; i < rd->n_reg_rules; i++) { |
502 | reg_rule = &rd->reg_rules[i]; | |
503 | if (!is_valid_reg_rule(reg_rule)) | |
504 | return false; | |
505 | } | |
506 | ||
507 | return true; | |
8318d78a JB |
508 | } |
509 | ||
038659e7 | 510 | static bool reg_does_bw_fit(const struct ieee80211_freq_range *freq_range, |
fe7ef5e9 | 511 | u32 center_freq_khz, u32 bw_khz) |
b2e1b302 | 512 | { |
038659e7 LR |
513 | u32 start_freq_khz, end_freq_khz; |
514 | ||
515 | start_freq_khz = center_freq_khz - (bw_khz/2); | |
516 | end_freq_khz = center_freq_khz + (bw_khz/2); | |
517 | ||
518 | if (start_freq_khz >= freq_range->start_freq_khz && | |
519 | end_freq_khz <= freq_range->end_freq_khz) | |
520 | return true; | |
521 | ||
522 | return false; | |
b2e1b302 | 523 | } |
8318d78a | 524 | |
0c7dc45d LR |
525 | /** |
526 | * freq_in_rule_band - tells us if a frequency is in a frequency band | |
527 | * @freq_range: frequency rule we want to query | |
528 | * @freq_khz: frequency we are inquiring about | |
529 | * | |
530 | * This lets us know if a specific frequency rule is or is not relevant to | |
531 | * a specific frequency's band. Bands are device specific and artificial | |
64629b9d VK |
532 | * definitions (the "2.4 GHz band", the "5 GHz band" and the "60GHz band"), |
533 | * however it is safe for now to assume that a frequency rule should not be | |
534 | * part of a frequency's band if the start freq or end freq are off by more | |
535 | * than 2 GHz for the 2.4 and 5 GHz bands, and by more than 10 GHz for the | |
536 | * 60 GHz band. | |
0c7dc45d LR |
537 | * This resolution can be lowered and should be considered as we add |
538 | * regulatory rule support for other "bands". | |
539 | **/ | |
540 | static bool freq_in_rule_band(const struct ieee80211_freq_range *freq_range, | |
1a919318 | 541 | u32 freq_khz) |
0c7dc45d LR |
542 | { |
543 | #define ONE_GHZ_IN_KHZ 1000000 | |
64629b9d VK |
544 | /* |
545 | * From 802.11ad: directional multi-gigabit (DMG): | |
546 | * Pertaining to operation in a frequency band containing a channel | |
547 | * with the Channel starting frequency above 45 GHz. | |
548 | */ | |
549 | u32 limit = freq_khz > 45 * ONE_GHZ_IN_KHZ ? | |
550 | 10 * ONE_GHZ_IN_KHZ : 2 * ONE_GHZ_IN_KHZ; | |
551 | if (abs(freq_khz - freq_range->start_freq_khz) <= limit) | |
0c7dc45d | 552 | return true; |
64629b9d | 553 | if (abs(freq_khz - freq_range->end_freq_khz) <= limit) |
0c7dc45d LR |
554 | return true; |
555 | return false; | |
556 | #undef ONE_GHZ_IN_KHZ | |
557 | } | |
558 | ||
fb1fc7ad LR |
559 | /* |
560 | * Helper for regdom_intersect(), this does the real | |
561 | * mathematical intersection fun | |
562 | */ | |
1a919318 JB |
563 | static int reg_rules_intersect(const struct ieee80211_reg_rule *rule1, |
564 | const struct ieee80211_reg_rule *rule2, | |
565 | struct ieee80211_reg_rule *intersected_rule) | |
9c96477d LR |
566 | { |
567 | const struct ieee80211_freq_range *freq_range1, *freq_range2; | |
568 | struct ieee80211_freq_range *freq_range; | |
569 | const struct ieee80211_power_rule *power_rule1, *power_rule2; | |
570 | struct ieee80211_power_rule *power_rule; | |
571 | u32 freq_diff; | |
572 | ||
573 | freq_range1 = &rule1->freq_range; | |
574 | freq_range2 = &rule2->freq_range; | |
575 | freq_range = &intersected_rule->freq_range; | |
576 | ||
577 | power_rule1 = &rule1->power_rule; | |
578 | power_rule2 = &rule2->power_rule; | |
579 | power_rule = &intersected_rule->power_rule; | |
580 | ||
581 | freq_range->start_freq_khz = max(freq_range1->start_freq_khz, | |
1a919318 | 582 | freq_range2->start_freq_khz); |
9c96477d | 583 | freq_range->end_freq_khz = min(freq_range1->end_freq_khz, |
1a919318 | 584 | freq_range2->end_freq_khz); |
9c96477d | 585 | freq_range->max_bandwidth_khz = min(freq_range1->max_bandwidth_khz, |
1a919318 | 586 | freq_range2->max_bandwidth_khz); |
9c96477d LR |
587 | |
588 | freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz; | |
589 | if (freq_range->max_bandwidth_khz > freq_diff) | |
590 | freq_range->max_bandwidth_khz = freq_diff; | |
591 | ||
592 | power_rule->max_eirp = min(power_rule1->max_eirp, | |
593 | power_rule2->max_eirp); | |
594 | power_rule->max_antenna_gain = min(power_rule1->max_antenna_gain, | |
595 | power_rule2->max_antenna_gain); | |
596 | ||
1a919318 | 597 | intersected_rule->flags = rule1->flags | rule2->flags; |
9c96477d LR |
598 | |
599 | if (!is_valid_reg_rule(intersected_rule)) | |
600 | return -EINVAL; | |
601 | ||
602 | return 0; | |
603 | } | |
604 | ||
605 | /** | |
606 | * regdom_intersect - do the intersection between two regulatory domains | |
607 | * @rd1: first regulatory domain | |
608 | * @rd2: second regulatory domain | |
609 | * | |
610 | * Use this function to get the intersection between two regulatory domains. | |
611 | * Once completed we will mark the alpha2 for the rd as intersected, "98", | |
612 | * as no one single alpha2 can represent this regulatory domain. | |
613 | * | |
614 | * Returns a pointer to the regulatory domain structure which will hold the | |
615 | * resulting intersection of rules between rd1 and rd2. We will | |
616 | * kzalloc() this structure for you. | |
617 | */ | |
1a919318 JB |
618 | static struct ieee80211_regdomain * |
619 | regdom_intersect(const struct ieee80211_regdomain *rd1, | |
620 | const struct ieee80211_regdomain *rd2) | |
9c96477d LR |
621 | { |
622 | int r, size_of_regd; | |
623 | unsigned int x, y; | |
624 | unsigned int num_rules = 0, rule_idx = 0; | |
625 | const struct ieee80211_reg_rule *rule1, *rule2; | |
626 | struct ieee80211_reg_rule *intersected_rule; | |
627 | struct ieee80211_regdomain *rd; | |
628 | /* This is just a dummy holder to help us count */ | |
74f53cd8 | 629 | struct ieee80211_reg_rule dummy_rule; |
9c96477d LR |
630 | |
631 | if (!rd1 || !rd2) | |
632 | return NULL; | |
633 | ||
fb1fc7ad LR |
634 | /* |
635 | * First we get a count of the rules we'll need, then we actually | |
9c96477d LR |
636 | * build them. This is to so we can malloc() and free() a |
637 | * regdomain once. The reason we use reg_rules_intersect() here | |
638 | * is it will return -EINVAL if the rule computed makes no sense. | |
fb1fc7ad LR |
639 | * All rules that do check out OK are valid. |
640 | */ | |
9c96477d LR |
641 | |
642 | for (x = 0; x < rd1->n_reg_rules; x++) { | |
643 | rule1 = &rd1->reg_rules[x]; | |
644 | for (y = 0; y < rd2->n_reg_rules; y++) { | |
645 | rule2 = &rd2->reg_rules[y]; | |
74f53cd8 | 646 | if (!reg_rules_intersect(rule1, rule2, &dummy_rule)) |
9c96477d | 647 | num_rules++; |
9c96477d LR |
648 | } |
649 | } | |
650 | ||
651 | if (!num_rules) | |
652 | return NULL; | |
653 | ||
654 | size_of_regd = sizeof(struct ieee80211_regdomain) + | |
82f20856 | 655 | num_rules * sizeof(struct ieee80211_reg_rule); |
9c96477d LR |
656 | |
657 | rd = kzalloc(size_of_regd, GFP_KERNEL); | |
658 | if (!rd) | |
659 | return NULL; | |
660 | ||
8a57fff0 | 661 | for (x = 0; x < rd1->n_reg_rules && rule_idx < num_rules; x++) { |
9c96477d | 662 | rule1 = &rd1->reg_rules[x]; |
8a57fff0 | 663 | for (y = 0; y < rd2->n_reg_rules && rule_idx < num_rules; y++) { |
9c96477d | 664 | rule2 = &rd2->reg_rules[y]; |
fb1fc7ad LR |
665 | /* |
666 | * This time around instead of using the stack lets | |
9c96477d | 667 | * write to the target rule directly saving ourselves |
fb1fc7ad LR |
668 | * a memcpy() |
669 | */ | |
9c96477d | 670 | intersected_rule = &rd->reg_rules[rule_idx]; |
1a919318 | 671 | r = reg_rules_intersect(rule1, rule2, intersected_rule); |
fb1fc7ad LR |
672 | /* |
673 | * No need to memset here the intersected rule here as | |
674 | * we're not using the stack anymore | |
675 | */ | |
9c96477d LR |
676 | if (r) |
677 | continue; | |
678 | rule_idx++; | |
679 | } | |
680 | } | |
681 | ||
682 | if (rule_idx != num_rules) { | |
683 | kfree(rd); | |
684 | return NULL; | |
685 | } | |
686 | ||
687 | rd->n_reg_rules = num_rules; | |
688 | rd->alpha2[0] = '9'; | |
689 | rd->alpha2[1] = '8'; | |
690 | ||
691 | return rd; | |
692 | } | |
693 | ||
fb1fc7ad LR |
694 | /* |
695 | * XXX: add support for the rest of enum nl80211_reg_rule_flags, we may | |
696 | * want to just have the channel structure use these | |
697 | */ | |
b2e1b302 LR |
698 | static u32 map_regdom_flags(u32 rd_flags) |
699 | { | |
700 | u32 channel_flags = 0; | |
701 | if (rd_flags & NL80211_RRF_PASSIVE_SCAN) | |
702 | channel_flags |= IEEE80211_CHAN_PASSIVE_SCAN; | |
703 | if (rd_flags & NL80211_RRF_NO_IBSS) | |
704 | channel_flags |= IEEE80211_CHAN_NO_IBSS; | |
705 | if (rd_flags & NL80211_RRF_DFS) | |
706 | channel_flags |= IEEE80211_CHAN_RADAR; | |
03f6b084 SF |
707 | if (rd_flags & NL80211_RRF_NO_OFDM) |
708 | channel_flags |= IEEE80211_CHAN_NO_OFDM; | |
b2e1b302 LR |
709 | return channel_flags; |
710 | } | |
711 | ||
361c9c8b JB |
712 | static const struct ieee80211_reg_rule * |
713 | freq_reg_info_regd(struct wiphy *wiphy, u32 center_freq, | |
714 | const struct ieee80211_regdomain *regd) | |
8318d78a JB |
715 | { |
716 | int i; | |
0c7dc45d | 717 | bool band_rule_found = false; |
038659e7 LR |
718 | bool bw_fits = false; |
719 | ||
3e0c3ff3 | 720 | if (!regd) |
361c9c8b | 721 | return ERR_PTR(-EINVAL); |
b2e1b302 | 722 | |
3e0c3ff3 | 723 | for (i = 0; i < regd->n_reg_rules; i++) { |
b2e1b302 LR |
724 | const struct ieee80211_reg_rule *rr; |
725 | const struct ieee80211_freq_range *fr = NULL; | |
b2e1b302 | 726 | |
3e0c3ff3 | 727 | rr = ®d->reg_rules[i]; |
b2e1b302 | 728 | fr = &rr->freq_range; |
0c7dc45d | 729 | |
fb1fc7ad LR |
730 | /* |
731 | * We only need to know if one frequency rule was | |
0c7dc45d | 732 | * was in center_freq's band, that's enough, so lets |
fb1fc7ad LR |
733 | * not overwrite it once found |
734 | */ | |
0c7dc45d LR |
735 | if (!band_rule_found) |
736 | band_rule_found = freq_in_rule_band(fr, center_freq); | |
737 | ||
fe7ef5e9 | 738 | bw_fits = reg_does_bw_fit(fr, center_freq, MHZ_TO_KHZ(20)); |
0c7dc45d | 739 | |
361c9c8b JB |
740 | if (band_rule_found && bw_fits) |
741 | return rr; | |
8318d78a JB |
742 | } |
743 | ||
0c7dc45d | 744 | if (!band_rule_found) |
361c9c8b | 745 | return ERR_PTR(-ERANGE); |
0c7dc45d | 746 | |
361c9c8b | 747 | return ERR_PTR(-EINVAL); |
b2e1b302 LR |
748 | } |
749 | ||
361c9c8b JB |
750 | const struct ieee80211_reg_rule *freq_reg_info(struct wiphy *wiphy, |
751 | u32 center_freq) | |
1fa25e41 | 752 | { |
5d885b99 | 753 | const struct ieee80211_regdomain *regd; |
c492db37 | 754 | struct regulatory_request *lr = get_last_request(); |
1a919318 | 755 | |
5d885b99 JB |
756 | /* |
757 | * Follow the driver's regulatory domain, if present, unless a country | |
758 | * IE has been processed or a user wants to help complaince further | |
759 | */ | |
c492db37 JB |
760 | if (lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && |
761 | lr->initiator != NL80211_REGDOM_SET_BY_USER && | |
5d885b99 | 762 | wiphy->regd) |
458f4f9e | 763 | regd = get_wiphy_regdom(wiphy); |
5d885b99 | 764 | else |
458f4f9e | 765 | regd = get_cfg80211_regdom(); |
5d885b99 | 766 | |
361c9c8b | 767 | return freq_reg_info_regd(wiphy, center_freq, regd); |
1fa25e41 | 768 | } |
4f366c5d | 769 | EXPORT_SYMBOL(freq_reg_info); |
b2e1b302 | 770 | |
034c6d6e | 771 | const char *reg_initiator_name(enum nl80211_reg_initiator initiator) |
926a0a09 LR |
772 | { |
773 | switch (initiator) { | |
774 | case NL80211_REGDOM_SET_BY_CORE: | |
034c6d6e | 775 | return "core"; |
926a0a09 | 776 | case NL80211_REGDOM_SET_BY_USER: |
034c6d6e | 777 | return "user"; |
926a0a09 | 778 | case NL80211_REGDOM_SET_BY_DRIVER: |
034c6d6e | 779 | return "driver"; |
926a0a09 | 780 | case NL80211_REGDOM_SET_BY_COUNTRY_IE: |
034c6d6e | 781 | return "country IE"; |
926a0a09 LR |
782 | default: |
783 | WARN_ON(1); | |
034c6d6e | 784 | return "bug"; |
926a0a09 LR |
785 | } |
786 | } | |
034c6d6e | 787 | EXPORT_SYMBOL(reg_initiator_name); |
e702d3cf | 788 | |
034c6d6e | 789 | #ifdef CONFIG_CFG80211_REG_DEBUG |
e702d3cf | 790 | static void chan_reg_rule_print_dbg(struct ieee80211_channel *chan, |
e702d3cf LR |
791 | const struct ieee80211_reg_rule *reg_rule) |
792 | { | |
793 | const struct ieee80211_power_rule *power_rule; | |
794 | const struct ieee80211_freq_range *freq_range; | |
795 | char max_antenna_gain[32]; | |
796 | ||
797 | power_rule = ®_rule->power_rule; | |
798 | freq_range = ®_rule->freq_range; | |
799 | ||
800 | if (!power_rule->max_antenna_gain) | |
801 | snprintf(max_antenna_gain, 32, "N/A"); | |
802 | else | |
803 | snprintf(max_antenna_gain, 32, "%d", power_rule->max_antenna_gain); | |
804 | ||
fe7ef5e9 JB |
805 | REG_DBG_PRINT("Updating information on frequency %d MHz with regulatory rule:\n", |
806 | chan->center_freq); | |
e702d3cf | 807 | |
56e6786e | 808 | REG_DBG_PRINT("%d KHz - %d KHz @ %d KHz), (%s mBi, %d mBm)\n", |
1a919318 JB |
809 | freq_range->start_freq_khz, freq_range->end_freq_khz, |
810 | freq_range->max_bandwidth_khz, max_antenna_gain, | |
e702d3cf LR |
811 | power_rule->max_eirp); |
812 | } | |
813 | #else | |
814 | static void chan_reg_rule_print_dbg(struct ieee80211_channel *chan, | |
e702d3cf LR |
815 | const struct ieee80211_reg_rule *reg_rule) |
816 | { | |
817 | return; | |
818 | } | |
926a0a09 LR |
819 | #endif |
820 | ||
038659e7 LR |
821 | /* |
822 | * Note that right now we assume the desired channel bandwidth | |
823 | * is always 20 MHz for each individual channel (HT40 uses 20 MHz | |
fe7ef5e9 | 824 | * per channel, the primary and the extension channel). |
038659e7 | 825 | */ |
7ca43d03 LR |
826 | static void handle_channel(struct wiphy *wiphy, |
827 | enum nl80211_reg_initiator initiator, | |
fdc9d7b2 | 828 | struct ieee80211_channel *chan) |
b2e1b302 | 829 | { |
038659e7 | 830 | u32 flags, bw_flags = 0; |
b2e1b302 LR |
831 | const struct ieee80211_reg_rule *reg_rule = NULL; |
832 | const struct ieee80211_power_rule *power_rule = NULL; | |
038659e7 | 833 | const struct ieee80211_freq_range *freq_range = NULL; |
fe33eb39 | 834 | struct wiphy *request_wiphy = NULL; |
c492db37 | 835 | struct regulatory_request *lr = get_last_request(); |
a92a3ce7 | 836 | |
c492db37 | 837 | request_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx); |
a92a3ce7 LR |
838 | |
839 | flags = chan->orig_flags; | |
b2e1b302 | 840 | |
361c9c8b JB |
841 | reg_rule = freq_reg_info(wiphy, MHZ_TO_KHZ(chan->center_freq)); |
842 | if (IS_ERR(reg_rule)) { | |
ca4ffe8f LR |
843 | /* |
844 | * We will disable all channels that do not match our | |
25985edc | 845 | * received regulatory rule unless the hint is coming |
ca4ffe8f LR |
846 | * from a Country IE and the Country IE had no information |
847 | * about a band. The IEEE 802.11 spec allows for an AP | |
848 | * to send only a subset of the regulatory rules allowed, | |
849 | * so an AP in the US that only supports 2.4 GHz may only send | |
850 | * a country IE with information for the 2.4 GHz band | |
851 | * while 5 GHz is still supported. | |
852 | */ | |
853 | if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE && | |
361c9c8b | 854 | PTR_ERR(reg_rule) == -ERANGE) |
ca4ffe8f LR |
855 | return; |
856 | ||
d91e41b6 | 857 | REG_DBG_PRINT("Disabling freq %d MHz\n", chan->center_freq); |
990de49f | 858 | chan->flags |= IEEE80211_CHAN_DISABLED; |
8318d78a | 859 | return; |
ca4ffe8f | 860 | } |
8318d78a | 861 | |
fe7ef5e9 | 862 | chan_reg_rule_print_dbg(chan, reg_rule); |
e702d3cf | 863 | |
b2e1b302 | 864 | power_rule = ®_rule->power_rule; |
038659e7 LR |
865 | freq_range = ®_rule->freq_range; |
866 | ||
867 | if (freq_range->max_bandwidth_khz < MHZ_TO_KHZ(40)) | |
868 | bw_flags = IEEE80211_CHAN_NO_HT40; | |
c7a6ee27 JB |
869 | if (freq_range->max_bandwidth_khz < MHZ_TO_KHZ(80)) |
870 | bw_flags |= IEEE80211_CHAN_NO_80MHZ; | |
871 | if (freq_range->max_bandwidth_khz < MHZ_TO_KHZ(160)) | |
872 | bw_flags |= IEEE80211_CHAN_NO_160MHZ; | |
b2e1b302 | 873 | |
c492db37 | 874 | if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER && |
806a9e39 | 875 | request_wiphy && request_wiphy == wiphy && |
5be83de5 | 876 | request_wiphy->flags & WIPHY_FLAG_STRICT_REGULATORY) { |
fb1fc7ad | 877 | /* |
25985edc | 878 | * This guarantees the driver's requested regulatory domain |
f976376d | 879 | * will always be used as a base for further regulatory |
fb1fc7ad LR |
880 | * settings |
881 | */ | |
f976376d | 882 | chan->flags = chan->orig_flags = |
038659e7 | 883 | map_regdom_flags(reg_rule->flags) | bw_flags; |
f976376d LR |
884 | chan->max_antenna_gain = chan->orig_mag = |
885 | (int) MBI_TO_DBI(power_rule->max_antenna_gain); | |
279f0f55 | 886 | chan->max_reg_power = chan->max_power = chan->orig_mpwr = |
f976376d LR |
887 | (int) MBM_TO_DBM(power_rule->max_eirp); |
888 | return; | |
889 | } | |
890 | ||
04f39047 SW |
891 | chan->dfs_state = NL80211_DFS_USABLE; |
892 | chan->dfs_state_entered = jiffies; | |
893 | ||
aa3d7eef | 894 | chan->beacon_found = false; |
038659e7 | 895 | chan->flags = flags | bw_flags | map_regdom_flags(reg_rule->flags); |
1a919318 JB |
896 | chan->max_antenna_gain = |
897 | min_t(int, chan->orig_mag, | |
898 | MBI_TO_DBI(power_rule->max_antenna_gain)); | |
eccc068e | 899 | chan->max_reg_power = (int) MBM_TO_DBM(power_rule->max_eirp); |
5e31fc08 SG |
900 | if (chan->orig_mpwr) { |
901 | /* | |
902 | * Devices that have their own custom regulatory domain | |
903 | * but also use WIPHY_FLAG_STRICT_REGULATORY will follow the | |
904 | * passed country IE power settings. | |
905 | */ | |
906 | if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE && | |
907 | wiphy->flags & WIPHY_FLAG_CUSTOM_REGULATORY && | |
908 | wiphy->flags & WIPHY_FLAG_STRICT_REGULATORY) | |
909 | chan->max_power = chan->max_reg_power; | |
910 | else | |
911 | chan->max_power = min(chan->orig_mpwr, | |
912 | chan->max_reg_power); | |
913 | } else | |
914 | chan->max_power = chan->max_reg_power; | |
8318d78a JB |
915 | } |
916 | ||
7ca43d03 | 917 | static void handle_band(struct wiphy *wiphy, |
fdc9d7b2 JB |
918 | enum nl80211_reg_initiator initiator, |
919 | struct ieee80211_supported_band *sband) | |
8318d78a | 920 | { |
a92a3ce7 | 921 | unsigned int i; |
a92a3ce7 | 922 | |
fdc9d7b2 JB |
923 | if (!sband) |
924 | return; | |
8318d78a JB |
925 | |
926 | for (i = 0; i < sband->n_channels; i++) | |
fdc9d7b2 | 927 | handle_channel(wiphy, initiator, &sband->channels[i]); |
8318d78a JB |
928 | } |
929 | ||
57b5ce07 LR |
930 | static bool reg_request_cell_base(struct regulatory_request *request) |
931 | { | |
932 | if (request->initiator != NL80211_REGDOM_SET_BY_USER) | |
933 | return false; | |
1a919318 | 934 | return request->user_reg_hint_type == NL80211_USER_REG_HINT_CELL_BASE; |
57b5ce07 LR |
935 | } |
936 | ||
937 | bool reg_last_request_cell_base(void) | |
938 | { | |
38fd2143 | 939 | return reg_request_cell_base(get_last_request()); |
57b5ce07 LR |
940 | } |
941 | ||
942 | #ifdef CONFIG_CFG80211_CERTIFICATION_ONUS | |
57b5ce07 | 943 | /* Core specific check */ |
2f92212b JB |
944 | static enum reg_request_treatment |
945 | reg_ignore_cell_hint(struct regulatory_request *pending_request) | |
57b5ce07 | 946 | { |
c492db37 JB |
947 | struct regulatory_request *lr = get_last_request(); |
948 | ||
57b5ce07 | 949 | if (!reg_num_devs_support_basehint) |
2f92212b | 950 | return REG_REQ_IGNORE; |
57b5ce07 | 951 | |
c492db37 | 952 | if (reg_request_cell_base(lr) && |
1a919318 | 953 | !regdom_changes(pending_request->alpha2)) |
2f92212b | 954 | return REG_REQ_ALREADY_SET; |
1a919318 | 955 | |
2f92212b | 956 | return REG_REQ_OK; |
57b5ce07 LR |
957 | } |
958 | ||
959 | /* Device specific check */ | |
960 | static bool reg_dev_ignore_cell_hint(struct wiphy *wiphy) | |
961 | { | |
1a919318 | 962 | return !(wiphy->features & NL80211_FEATURE_CELL_BASE_REG_HINTS); |
57b5ce07 LR |
963 | } |
964 | #else | |
965 | static int reg_ignore_cell_hint(struct regulatory_request *pending_request) | |
966 | { | |
2f92212b | 967 | return REG_REQ_IGNORE; |
57b5ce07 | 968 | } |
1a919318 JB |
969 | |
970 | static bool reg_dev_ignore_cell_hint(struct wiphy *wiphy) | |
57b5ce07 LR |
971 | { |
972 | return true; | |
973 | } | |
974 | #endif | |
975 | ||
fa1fb9cb LR |
976 | static bool wiphy_strict_alpha2_regd(struct wiphy *wiphy) |
977 | { | |
978 | if (wiphy->flags & WIPHY_FLAG_STRICT_REGULATORY && | |
979 | !(wiphy->flags & WIPHY_FLAG_CUSTOM_REGULATORY)) | |
980 | return true; | |
981 | return false; | |
982 | } | |
57b5ce07 | 983 | |
7db90f4a LR |
984 | static bool ignore_reg_update(struct wiphy *wiphy, |
985 | enum nl80211_reg_initiator initiator) | |
14b9815a | 986 | { |
c492db37 JB |
987 | struct regulatory_request *lr = get_last_request(); |
988 | ||
989 | if (!lr) { | |
034c6d6e LR |
990 | REG_DBG_PRINT("Ignoring regulatory request set by %s " |
991 | "since last_request is not set\n", | |
926a0a09 | 992 | reg_initiator_name(initiator)); |
14b9815a | 993 | return true; |
926a0a09 LR |
994 | } |
995 | ||
7db90f4a | 996 | if (initiator == NL80211_REGDOM_SET_BY_CORE && |
926a0a09 | 997 | wiphy->flags & WIPHY_FLAG_CUSTOM_REGULATORY) { |
034c6d6e LR |
998 | REG_DBG_PRINT("Ignoring regulatory request set by %s " |
999 | "since the driver uses its own custom " | |
1000 | "regulatory domain\n", | |
926a0a09 | 1001 | reg_initiator_name(initiator)); |
14b9815a | 1002 | return true; |
926a0a09 LR |
1003 | } |
1004 | ||
fb1fc7ad LR |
1005 | /* |
1006 | * wiphy->regd will be set once the device has its own | |
1007 | * desired regulatory domain set | |
1008 | */ | |
fa1fb9cb | 1009 | if (wiphy_strict_alpha2_regd(wiphy) && !wiphy->regd && |
749b527b | 1010 | initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && |
c492db37 | 1011 | !is_world_regdom(lr->alpha2)) { |
034c6d6e LR |
1012 | REG_DBG_PRINT("Ignoring regulatory request set by %s " |
1013 | "since the driver requires its own regulatory " | |
1014 | "domain to be set first\n", | |
926a0a09 | 1015 | reg_initiator_name(initiator)); |
14b9815a | 1016 | return true; |
926a0a09 LR |
1017 | } |
1018 | ||
c492db37 | 1019 | if (reg_request_cell_base(lr)) |
57b5ce07 LR |
1020 | return reg_dev_ignore_cell_hint(wiphy); |
1021 | ||
14b9815a LR |
1022 | return false; |
1023 | } | |
1024 | ||
3195e489 LR |
1025 | static bool reg_is_world_roaming(struct wiphy *wiphy) |
1026 | { | |
1027 | const struct ieee80211_regdomain *cr = get_cfg80211_regdom(); | |
1028 | const struct ieee80211_regdomain *wr = get_wiphy_regdom(wiphy); | |
1029 | struct regulatory_request *lr = get_last_request(); | |
1030 | ||
1031 | if (is_world_regdom(cr->alpha2) || (wr && is_world_regdom(wr->alpha2))) | |
1032 | return true; | |
1033 | ||
1034 | if (lr && lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && | |
1035 | wiphy->flags & WIPHY_FLAG_CUSTOM_REGULATORY) | |
1036 | return true; | |
1037 | ||
1038 | return false; | |
1039 | } | |
1040 | ||
1a919318 | 1041 | static void handle_reg_beacon(struct wiphy *wiphy, unsigned int chan_idx, |
e38f8a7a LR |
1042 | struct reg_beacon *reg_beacon) |
1043 | { | |
e38f8a7a LR |
1044 | struct ieee80211_supported_band *sband; |
1045 | struct ieee80211_channel *chan; | |
6bad8766 LR |
1046 | bool channel_changed = false; |
1047 | struct ieee80211_channel chan_before; | |
e38f8a7a | 1048 | |
e38f8a7a LR |
1049 | sband = wiphy->bands[reg_beacon->chan.band]; |
1050 | chan = &sband->channels[chan_idx]; | |
1051 | ||
1052 | if (likely(chan->center_freq != reg_beacon->chan.center_freq)) | |
1053 | return; | |
1054 | ||
6bad8766 LR |
1055 | if (chan->beacon_found) |
1056 | return; | |
1057 | ||
1058 | chan->beacon_found = true; | |
1059 | ||
0f500a5f LR |
1060 | if (!reg_is_world_roaming(wiphy)) |
1061 | return; | |
1062 | ||
5be83de5 | 1063 | if (wiphy->flags & WIPHY_FLAG_DISABLE_BEACON_HINTS) |
37184244 LR |
1064 | return; |
1065 | ||
6bad8766 LR |
1066 | chan_before.center_freq = chan->center_freq; |
1067 | chan_before.flags = chan->flags; | |
1068 | ||
37184244 | 1069 | if (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN) { |
e38f8a7a | 1070 | chan->flags &= ~IEEE80211_CHAN_PASSIVE_SCAN; |
6bad8766 | 1071 | channel_changed = true; |
e38f8a7a LR |
1072 | } |
1073 | ||
37184244 | 1074 | if (chan->flags & IEEE80211_CHAN_NO_IBSS) { |
e38f8a7a | 1075 | chan->flags &= ~IEEE80211_CHAN_NO_IBSS; |
6bad8766 | 1076 | channel_changed = true; |
e38f8a7a LR |
1077 | } |
1078 | ||
6bad8766 LR |
1079 | if (channel_changed) |
1080 | nl80211_send_beacon_hint_event(wiphy, &chan_before, chan); | |
e38f8a7a LR |
1081 | } |
1082 | ||
1083 | /* | |
1084 | * Called when a scan on a wiphy finds a beacon on | |
1085 | * new channel | |
1086 | */ | |
1087 | static void wiphy_update_new_beacon(struct wiphy *wiphy, | |
1088 | struct reg_beacon *reg_beacon) | |
1089 | { | |
1090 | unsigned int i; | |
1091 | struct ieee80211_supported_band *sband; | |
1092 | ||
e38f8a7a LR |
1093 | if (!wiphy->bands[reg_beacon->chan.band]) |
1094 | return; | |
1095 | ||
1096 | sband = wiphy->bands[reg_beacon->chan.band]; | |
1097 | ||
1098 | for (i = 0; i < sband->n_channels; i++) | |
1099 | handle_reg_beacon(wiphy, i, reg_beacon); | |
1100 | } | |
1101 | ||
1102 | /* | |
1103 | * Called upon reg changes or a new wiphy is added | |
1104 | */ | |
1105 | static void wiphy_update_beacon_reg(struct wiphy *wiphy) | |
1106 | { | |
1107 | unsigned int i; | |
1108 | struct ieee80211_supported_band *sband; | |
1109 | struct reg_beacon *reg_beacon; | |
1110 | ||
e38f8a7a LR |
1111 | list_for_each_entry(reg_beacon, ®_beacon_list, list) { |
1112 | if (!wiphy->bands[reg_beacon->chan.band]) | |
1113 | continue; | |
1114 | sband = wiphy->bands[reg_beacon->chan.band]; | |
1115 | for (i = 0; i < sband->n_channels; i++) | |
1116 | handle_reg_beacon(wiphy, i, reg_beacon); | |
1117 | } | |
1118 | } | |
1119 | ||
e38f8a7a LR |
1120 | /* Reap the advantages of previously found beacons */ |
1121 | static void reg_process_beacons(struct wiphy *wiphy) | |
1122 | { | |
b1ed8ddd LR |
1123 | /* |
1124 | * Means we are just firing up cfg80211, so no beacons would | |
1125 | * have been processed yet. | |
1126 | */ | |
1127 | if (!last_request) | |
1128 | return; | |
e38f8a7a LR |
1129 | wiphy_update_beacon_reg(wiphy); |
1130 | } | |
1131 | ||
1a919318 | 1132 | static bool is_ht40_allowed(struct ieee80211_channel *chan) |
038659e7 LR |
1133 | { |
1134 | if (!chan) | |
1a919318 | 1135 | return false; |
038659e7 | 1136 | if (chan->flags & IEEE80211_CHAN_DISABLED) |
1a919318 | 1137 | return false; |
038659e7 | 1138 | /* This would happen when regulatory rules disallow HT40 completely */ |
55b183ad FF |
1139 | if ((chan->flags & IEEE80211_CHAN_NO_HT40) == IEEE80211_CHAN_NO_HT40) |
1140 | return false; | |
1141 | return true; | |
038659e7 LR |
1142 | } |
1143 | ||
1144 | static void reg_process_ht_flags_channel(struct wiphy *wiphy, | |
fdc9d7b2 | 1145 | struct ieee80211_channel *channel) |
038659e7 | 1146 | { |
fdc9d7b2 | 1147 | struct ieee80211_supported_band *sband = wiphy->bands[channel->band]; |
038659e7 LR |
1148 | struct ieee80211_channel *channel_before = NULL, *channel_after = NULL; |
1149 | unsigned int i; | |
1150 | ||
1a919318 | 1151 | if (!is_ht40_allowed(channel)) { |
038659e7 LR |
1152 | channel->flags |= IEEE80211_CHAN_NO_HT40; |
1153 | return; | |
1154 | } | |
1155 | ||
1156 | /* | |
1157 | * We need to ensure the extension channels exist to | |
1158 | * be able to use HT40- or HT40+, this finds them (or not) | |
1159 | */ | |
1160 | for (i = 0; i < sband->n_channels; i++) { | |
1161 | struct ieee80211_channel *c = &sband->channels[i]; | |
1a919318 | 1162 | |
038659e7 LR |
1163 | if (c->center_freq == (channel->center_freq - 20)) |
1164 | channel_before = c; | |
1165 | if (c->center_freq == (channel->center_freq + 20)) | |
1166 | channel_after = c; | |
1167 | } | |
1168 | ||
1169 | /* | |
1170 | * Please note that this assumes target bandwidth is 20 MHz, | |
1171 | * if that ever changes we also need to change the below logic | |
1172 | * to include that as well. | |
1173 | */ | |
1a919318 | 1174 | if (!is_ht40_allowed(channel_before)) |
689da1b3 | 1175 | channel->flags |= IEEE80211_CHAN_NO_HT40MINUS; |
038659e7 | 1176 | else |
689da1b3 | 1177 | channel->flags &= ~IEEE80211_CHAN_NO_HT40MINUS; |
038659e7 | 1178 | |
1a919318 | 1179 | if (!is_ht40_allowed(channel_after)) |
689da1b3 | 1180 | channel->flags |= IEEE80211_CHAN_NO_HT40PLUS; |
038659e7 | 1181 | else |
689da1b3 | 1182 | channel->flags &= ~IEEE80211_CHAN_NO_HT40PLUS; |
038659e7 LR |
1183 | } |
1184 | ||
1185 | static void reg_process_ht_flags_band(struct wiphy *wiphy, | |
fdc9d7b2 | 1186 | struct ieee80211_supported_band *sband) |
038659e7 LR |
1187 | { |
1188 | unsigned int i; | |
038659e7 | 1189 | |
fdc9d7b2 JB |
1190 | if (!sband) |
1191 | return; | |
038659e7 LR |
1192 | |
1193 | for (i = 0; i < sband->n_channels; i++) | |
fdc9d7b2 | 1194 | reg_process_ht_flags_channel(wiphy, &sband->channels[i]); |
038659e7 LR |
1195 | } |
1196 | ||
1197 | static void reg_process_ht_flags(struct wiphy *wiphy) | |
1198 | { | |
1199 | enum ieee80211_band band; | |
1200 | ||
1201 | if (!wiphy) | |
1202 | return; | |
1203 | ||
fdc9d7b2 JB |
1204 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) |
1205 | reg_process_ht_flags_band(wiphy, wiphy->bands[band]); | |
038659e7 LR |
1206 | } |
1207 | ||
eac03e38 SN |
1208 | static void wiphy_update_regulatory(struct wiphy *wiphy, |
1209 | enum nl80211_reg_initiator initiator) | |
b2e1b302 LR |
1210 | { |
1211 | enum ieee80211_band band; | |
c492db37 | 1212 | struct regulatory_request *lr = get_last_request(); |
eac03e38 | 1213 | |
7db90f4a | 1214 | if (ignore_reg_update(wiphy, initiator)) |
a203c2aa SN |
1215 | return; |
1216 | ||
c492db37 | 1217 | lr->dfs_region = get_cfg80211_regdom()->dfs_region; |
b68e6b3b | 1218 | |
fdc9d7b2 JB |
1219 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) |
1220 | handle_band(wiphy, initiator, wiphy->bands[band]); | |
a203c2aa | 1221 | |
e38f8a7a | 1222 | reg_process_beacons(wiphy); |
038659e7 | 1223 | reg_process_ht_flags(wiphy); |
1a919318 | 1224 | |
560e28e1 | 1225 | if (wiphy->reg_notifier) |
c492db37 | 1226 | wiphy->reg_notifier(wiphy, lr); |
b2e1b302 LR |
1227 | } |
1228 | ||
d7549cbb SN |
1229 | static void update_all_wiphy_regulatory(enum nl80211_reg_initiator initiator) |
1230 | { | |
1231 | struct cfg80211_registered_device *rdev; | |
4a38994f | 1232 | struct wiphy *wiphy; |
d7549cbb | 1233 | |
5fe231e8 | 1234 | ASSERT_RTNL(); |
458f4f9e | 1235 | |
4a38994f RM |
1236 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) { |
1237 | wiphy = &rdev->wiphy; | |
1238 | wiphy_update_regulatory(wiphy, initiator); | |
1239 | /* | |
1240 | * Regulatory updates set by CORE are ignored for custom | |
1241 | * regulatory cards. Let us notify the changes to the driver, | |
1242 | * as some drivers used this to restore its orig_* reg domain. | |
1243 | */ | |
1244 | if (initiator == NL80211_REGDOM_SET_BY_CORE && | |
1245 | wiphy->flags & WIPHY_FLAG_CUSTOM_REGULATORY && | |
1246 | wiphy->reg_notifier) | |
c492db37 | 1247 | wiphy->reg_notifier(wiphy, get_last_request()); |
4a38994f | 1248 | } |
d7549cbb SN |
1249 | } |
1250 | ||
1fa25e41 | 1251 | static void handle_channel_custom(struct wiphy *wiphy, |
fdc9d7b2 | 1252 | struct ieee80211_channel *chan, |
1fa25e41 LR |
1253 | const struct ieee80211_regdomain *regd) |
1254 | { | |
038659e7 | 1255 | u32 bw_flags = 0; |
1fa25e41 LR |
1256 | const struct ieee80211_reg_rule *reg_rule = NULL; |
1257 | const struct ieee80211_power_rule *power_rule = NULL; | |
038659e7 | 1258 | const struct ieee80211_freq_range *freq_range = NULL; |
ac46d48e | 1259 | |
361c9c8b JB |
1260 | reg_rule = freq_reg_info_regd(wiphy, MHZ_TO_KHZ(chan->center_freq), |
1261 | regd); | |
1fa25e41 | 1262 | |
361c9c8b | 1263 | if (IS_ERR(reg_rule)) { |
fe7ef5e9 JB |
1264 | REG_DBG_PRINT("Disabling freq %d MHz as custom regd has no rule that fits it\n", |
1265 | chan->center_freq); | |
1fa25e41 LR |
1266 | chan->flags = IEEE80211_CHAN_DISABLED; |
1267 | return; | |
1268 | } | |
1269 | ||
fe7ef5e9 | 1270 | chan_reg_rule_print_dbg(chan, reg_rule); |
e702d3cf | 1271 | |
1fa25e41 | 1272 | power_rule = ®_rule->power_rule; |
038659e7 LR |
1273 | freq_range = ®_rule->freq_range; |
1274 | ||
1275 | if (freq_range->max_bandwidth_khz < MHZ_TO_KHZ(40)) | |
1276 | bw_flags = IEEE80211_CHAN_NO_HT40; | |
c7a6ee27 JB |
1277 | if (freq_range->max_bandwidth_khz < MHZ_TO_KHZ(80)) |
1278 | bw_flags |= IEEE80211_CHAN_NO_80MHZ; | |
1279 | if (freq_range->max_bandwidth_khz < MHZ_TO_KHZ(160)) | |
1280 | bw_flags |= IEEE80211_CHAN_NO_160MHZ; | |
1fa25e41 | 1281 | |
038659e7 | 1282 | chan->flags |= map_regdom_flags(reg_rule->flags) | bw_flags; |
1fa25e41 | 1283 | chan->max_antenna_gain = (int) MBI_TO_DBI(power_rule->max_antenna_gain); |
279f0f55 FF |
1284 | chan->max_reg_power = chan->max_power = |
1285 | (int) MBM_TO_DBM(power_rule->max_eirp); | |
1fa25e41 LR |
1286 | } |
1287 | ||
fdc9d7b2 JB |
1288 | static void handle_band_custom(struct wiphy *wiphy, |
1289 | struct ieee80211_supported_band *sband, | |
1fa25e41 LR |
1290 | const struct ieee80211_regdomain *regd) |
1291 | { | |
1292 | unsigned int i; | |
1fa25e41 | 1293 | |
fdc9d7b2 JB |
1294 | if (!sband) |
1295 | return; | |
1fa25e41 LR |
1296 | |
1297 | for (i = 0; i < sband->n_channels; i++) | |
fdc9d7b2 | 1298 | handle_channel_custom(wiphy, &sband->channels[i], regd); |
1fa25e41 LR |
1299 | } |
1300 | ||
1301 | /* Used by drivers prior to wiphy registration */ | |
1302 | void wiphy_apply_custom_regulatory(struct wiphy *wiphy, | |
1303 | const struct ieee80211_regdomain *regd) | |
1304 | { | |
1305 | enum ieee80211_band band; | |
bbcf3f02 | 1306 | unsigned int bands_set = 0; |
ac46d48e | 1307 | |
1fa25e41 | 1308 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) { |
bbcf3f02 LR |
1309 | if (!wiphy->bands[band]) |
1310 | continue; | |
fdc9d7b2 | 1311 | handle_band_custom(wiphy, wiphy->bands[band], regd); |
bbcf3f02 | 1312 | bands_set++; |
b2e1b302 | 1313 | } |
bbcf3f02 LR |
1314 | |
1315 | /* | |
1316 | * no point in calling this if it won't have any effect | |
1a919318 | 1317 | * on your device's supported bands. |
bbcf3f02 LR |
1318 | */ |
1319 | WARN_ON(!bands_set); | |
b2e1b302 | 1320 | } |
1fa25e41 LR |
1321 | EXPORT_SYMBOL(wiphy_apply_custom_regulatory); |
1322 | ||
84fa4f43 JB |
1323 | /* This has the logic which determines when a new request |
1324 | * should be ignored. */ | |
2f92212b JB |
1325 | static enum reg_request_treatment |
1326 | get_reg_request_treatment(struct wiphy *wiphy, | |
2f92cd2e | 1327 | struct regulatory_request *pending_request) |
84fa4f43 | 1328 | { |
806a9e39 | 1329 | struct wiphy *last_wiphy = NULL; |
c492db37 | 1330 | struct regulatory_request *lr = get_last_request(); |
761cf7ec | 1331 | |
84fa4f43 | 1332 | /* All initial requests are respected */ |
c492db37 | 1333 | if (!lr) |
2f92212b | 1334 | return REG_REQ_OK; |
84fa4f43 | 1335 | |
2f92cd2e | 1336 | switch (pending_request->initiator) { |
7db90f4a | 1337 | case NL80211_REGDOM_SET_BY_CORE: |
2f92212b | 1338 | return REG_REQ_OK; |
7db90f4a | 1339 | case NL80211_REGDOM_SET_BY_COUNTRY_IE: |
c492db37 | 1340 | if (reg_request_cell_base(lr)) { |
57b5ce07 LR |
1341 | /* Trust a Cell base station over the AP's country IE */ |
1342 | if (regdom_changes(pending_request->alpha2)) | |
2f92212b JB |
1343 | return REG_REQ_IGNORE; |
1344 | return REG_REQ_ALREADY_SET; | |
57b5ce07 LR |
1345 | } |
1346 | ||
c492db37 | 1347 | last_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx); |
806a9e39 | 1348 | |
2f92cd2e | 1349 | if (unlikely(!is_an_alpha2(pending_request->alpha2))) |
84fa4f43 | 1350 | return -EINVAL; |
c492db37 | 1351 | if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) { |
806a9e39 | 1352 | if (last_wiphy != wiphy) { |
84fa4f43 JB |
1353 | /* |
1354 | * Two cards with two APs claiming different | |
1fe90b03 | 1355 | * Country IE alpha2s. We could |
84fa4f43 JB |
1356 | * intersect them, but that seems unlikely |
1357 | * to be correct. Reject second one for now. | |
1358 | */ | |
2f92cd2e | 1359 | if (regdom_changes(pending_request->alpha2)) |
2f92212b JB |
1360 | return REG_REQ_IGNORE; |
1361 | return REG_REQ_ALREADY_SET; | |
84fa4f43 | 1362 | } |
fb1fc7ad LR |
1363 | /* |
1364 | * Two consecutive Country IE hints on the same wiphy. | |
1365 | * This should be picked up early by the driver/stack | |
1366 | */ | |
2f92cd2e | 1367 | if (WARN_ON(regdom_changes(pending_request->alpha2))) |
2f92212b JB |
1368 | return REG_REQ_OK; |
1369 | return REG_REQ_ALREADY_SET; | |
84fa4f43 | 1370 | } |
3430140a | 1371 | return REG_REQ_OK; |
7db90f4a | 1372 | case NL80211_REGDOM_SET_BY_DRIVER: |
c492db37 | 1373 | if (lr->initiator == NL80211_REGDOM_SET_BY_CORE) { |
2f92cd2e | 1374 | if (regdom_changes(pending_request->alpha2)) |
2f92212b JB |
1375 | return REG_REQ_OK; |
1376 | return REG_REQ_ALREADY_SET; | |
e74b1e7f | 1377 | } |
fff32c04 LR |
1378 | |
1379 | /* | |
1380 | * This would happen if you unplug and plug your card | |
1381 | * back in or if you add a new device for which the previously | |
1382 | * loaded card also agrees on the regulatory domain. | |
1383 | */ | |
c492db37 | 1384 | if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER && |
2f92cd2e | 1385 | !regdom_changes(pending_request->alpha2)) |
2f92212b | 1386 | return REG_REQ_ALREADY_SET; |
fff32c04 | 1387 | |
2f92212b | 1388 | return REG_REQ_INTERSECT; |
7db90f4a | 1389 | case NL80211_REGDOM_SET_BY_USER: |
57b5ce07 LR |
1390 | if (reg_request_cell_base(pending_request)) |
1391 | return reg_ignore_cell_hint(pending_request); | |
1392 | ||
c492db37 | 1393 | if (reg_request_cell_base(lr)) |
2f92212b | 1394 | return REG_REQ_IGNORE; |
57b5ce07 | 1395 | |
c492db37 | 1396 | if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) |
2f92212b | 1397 | return REG_REQ_INTERSECT; |
fb1fc7ad LR |
1398 | /* |
1399 | * If the user knows better the user should set the regdom | |
1400 | * to their country before the IE is picked up | |
1401 | */ | |
c492db37 JB |
1402 | if (lr->initiator == NL80211_REGDOM_SET_BY_USER && |
1403 | lr->intersect) | |
2f92212b | 1404 | return REG_REQ_IGNORE; |
fb1fc7ad LR |
1405 | /* |
1406 | * Process user requests only after previous user/driver/core | |
1407 | * requests have been processed | |
1408 | */ | |
c492db37 JB |
1409 | if ((lr->initiator == NL80211_REGDOM_SET_BY_CORE || |
1410 | lr->initiator == NL80211_REGDOM_SET_BY_DRIVER || | |
1411 | lr->initiator == NL80211_REGDOM_SET_BY_USER) && | |
1412 | regdom_changes(lr->alpha2)) | |
2f92212b | 1413 | return REG_REQ_IGNORE; |
5eebade6 | 1414 | |
baeb66fe | 1415 | if (!regdom_changes(pending_request->alpha2)) |
2f92212b | 1416 | return REG_REQ_ALREADY_SET; |
e74b1e7f | 1417 | |
2f92212b | 1418 | return REG_REQ_OK; |
84fa4f43 JB |
1419 | } |
1420 | ||
2f92212b | 1421 | return REG_REQ_IGNORE; |
84fa4f43 JB |
1422 | } |
1423 | ||
b2e253cf LR |
1424 | static void reg_set_request_processed(void) |
1425 | { | |
1426 | bool need_more_processing = false; | |
c492db37 | 1427 | struct regulatory_request *lr = get_last_request(); |
b2e253cf | 1428 | |
c492db37 | 1429 | lr->processed = true; |
b2e253cf LR |
1430 | |
1431 | spin_lock(®_requests_lock); | |
1432 | if (!list_empty(®_requests_list)) | |
1433 | need_more_processing = true; | |
1434 | spin_unlock(®_requests_lock); | |
1435 | ||
c492db37 | 1436 | if (lr->initiator == NL80211_REGDOM_SET_BY_USER) |
fe20b39e | 1437 | cancel_delayed_work(®_timeout); |
a90c7a31 | 1438 | |
b2e253cf LR |
1439 | if (need_more_processing) |
1440 | schedule_work(®_work); | |
1441 | } | |
1442 | ||
d1c96a9a LR |
1443 | /** |
1444 | * __regulatory_hint - hint to the wireless core a regulatory domain | |
1445 | * @wiphy: if the hint comes from country information from an AP, this | |
1446 | * is required to be set to the wiphy that received the information | |
28da32d7 | 1447 | * @pending_request: the regulatory request currently being processed |
d1c96a9a LR |
1448 | * |
1449 | * The Wireless subsystem can use this function to hint to the wireless core | |
28da32d7 | 1450 | * what it believes should be the current regulatory domain. |
d1c96a9a | 1451 | * |
2f92212b | 1452 | * Returns one of the different reg request treatment values. |
d1c96a9a | 1453 | */ |
2f92212b JB |
1454 | static enum reg_request_treatment |
1455 | __regulatory_hint(struct wiphy *wiphy, | |
1456 | struct regulatory_request *pending_request) | |
b2e1b302 | 1457 | { |
e9763c3c | 1458 | const struct ieee80211_regdomain *regd; |
9c96477d | 1459 | bool intersect = false; |
2f92212b | 1460 | enum reg_request_treatment treatment; |
c492db37 | 1461 | struct regulatory_request *lr; |
761cf7ec | 1462 | |
2f92212b | 1463 | treatment = get_reg_request_treatment(wiphy, pending_request); |
9c96477d | 1464 | |
2f92212b JB |
1465 | switch (treatment) { |
1466 | case REG_REQ_INTERSECT: | |
7db90f4a LR |
1467 | if (pending_request->initiator == |
1468 | NL80211_REGDOM_SET_BY_DRIVER) { | |
458f4f9e | 1469 | regd = reg_copy_regd(get_cfg80211_regdom()); |
e9763c3c | 1470 | if (IS_ERR(regd)) { |
d951c1dd | 1471 | kfree(pending_request); |
e9763c3c | 1472 | return PTR_ERR(regd); |
d951c1dd | 1473 | } |
458f4f9e | 1474 | rcu_assign_pointer(wiphy->regd, regd); |
3e0c3ff3 | 1475 | } |
9c96477d | 1476 | intersect = true; |
2f92212b JB |
1477 | break; |
1478 | case REG_REQ_OK: | |
1479 | break; | |
1480 | default: | |
fb1fc7ad LR |
1481 | /* |
1482 | * If the regulatory domain being requested by the | |
3e0c3ff3 | 1483 | * driver has already been set just copy it to the |
fb1fc7ad LR |
1484 | * wiphy |
1485 | */ | |
2f92212b JB |
1486 | if (treatment == REG_REQ_ALREADY_SET && |
1487 | pending_request->initiator == NL80211_REGDOM_SET_BY_DRIVER) { | |
458f4f9e | 1488 | regd = reg_copy_regd(get_cfg80211_regdom()); |
e9763c3c | 1489 | if (IS_ERR(regd)) { |
d951c1dd | 1490 | kfree(pending_request); |
2f92212b | 1491 | return REG_REQ_IGNORE; |
d951c1dd | 1492 | } |
2f92212b | 1493 | treatment = REG_REQ_ALREADY_SET; |
458f4f9e | 1494 | rcu_assign_pointer(wiphy->regd, regd); |
3e0c3ff3 LR |
1495 | goto new_request; |
1496 | } | |
d951c1dd | 1497 | kfree(pending_request); |
2f92212b | 1498 | return treatment; |
3e0c3ff3 | 1499 | } |
b2e1b302 | 1500 | |
3e0c3ff3 | 1501 | new_request: |
c492db37 JB |
1502 | lr = get_last_request(); |
1503 | if (lr != &core_request_world && lr) | |
1504 | kfree_rcu(lr, rcu_head); | |
5203cdb6 | 1505 | |
c492db37 JB |
1506 | pending_request->intersect = intersect; |
1507 | pending_request->processed = false; | |
1508 | rcu_assign_pointer(last_request, pending_request); | |
1509 | lr = pending_request; | |
5203cdb6 | 1510 | |
d951c1dd | 1511 | pending_request = NULL; |
3e0c3ff3 | 1512 | |
c492db37 JB |
1513 | if (lr->initiator == NL80211_REGDOM_SET_BY_USER) { |
1514 | user_alpha2[0] = lr->alpha2[0]; | |
1515 | user_alpha2[1] = lr->alpha2[1]; | |
09d989d1 LR |
1516 | } |
1517 | ||
2f92212b JB |
1518 | /* When r == REG_REQ_INTERSECT we do need to call CRDA */ |
1519 | if (treatment != REG_REQ_OK && treatment != REG_REQ_INTERSECT) { | |
73d54c9e LR |
1520 | /* |
1521 | * Since CRDA will not be called in this case as we already | |
1522 | * have applied the requested regulatory domain before we just | |
1523 | * inform userspace we have processed the request | |
1524 | */ | |
2f92212b | 1525 | if (treatment == REG_REQ_ALREADY_SET) { |
c492db37 | 1526 | nl80211_send_reg_change_event(lr); |
b2e253cf LR |
1527 | reg_set_request_processed(); |
1528 | } | |
2f92212b | 1529 | return treatment; |
73d54c9e | 1530 | } |
3e0c3ff3 | 1531 | |
c492db37 | 1532 | if (call_crda(lr->alpha2)) |
2f92212b JB |
1533 | return REG_REQ_IGNORE; |
1534 | return REG_REQ_OK; | |
b2e1b302 LR |
1535 | } |
1536 | ||
30a548c7 | 1537 | /* This processes *all* regulatory hints */ |
8848bef0 LR |
1538 | static void reg_process_hint(struct regulatory_request *reg_request, |
1539 | enum nl80211_reg_initiator reg_initiator) | |
fe33eb39 | 1540 | { |
fe33eb39 LR |
1541 | struct wiphy *wiphy = NULL; |
1542 | ||
fdc9d7b2 JB |
1543 | if (WARN_ON(!reg_request->alpha2)) |
1544 | return; | |
fe33eb39 | 1545 | |
f4173766 | 1546 | if (reg_request->wiphy_idx != WIPHY_IDX_INVALID) |
fe33eb39 LR |
1547 | wiphy = wiphy_idx_to_wiphy(reg_request->wiphy_idx); |
1548 | ||
1a919318 | 1549 | if (reg_initiator == NL80211_REGDOM_SET_BY_DRIVER && !wiphy) { |
d951c1dd | 1550 | kfree(reg_request); |
b0e2880b | 1551 | return; |
fe33eb39 LR |
1552 | } |
1553 | ||
2f92212b JB |
1554 | switch (__regulatory_hint(wiphy, reg_request)) { |
1555 | case REG_REQ_ALREADY_SET: | |
1556 | /* This is required so that the orig_* parameters are saved */ | |
1557 | if (wiphy && wiphy->flags & WIPHY_FLAG_STRICT_REGULATORY) | |
1558 | wiphy_update_regulatory(wiphy, reg_initiator); | |
1559 | break; | |
1560 | default: | |
1561 | if (reg_initiator == NL80211_REGDOM_SET_BY_USER) | |
1562 | schedule_delayed_work(®_timeout, | |
1563 | msecs_to_jiffies(3142)); | |
1564 | break; | |
a90c7a31 | 1565 | } |
fe33eb39 LR |
1566 | } |
1567 | ||
b2e253cf LR |
1568 | /* |
1569 | * Processes regulatory hints, this is all the NL80211_REGDOM_SET_BY_* | |
1570 | * Regulatory hints come on a first come first serve basis and we | |
1571 | * must process each one atomically. | |
1572 | */ | |
fe33eb39 | 1573 | static void reg_process_pending_hints(void) |
b0e2880b | 1574 | { |
c492db37 | 1575 | struct regulatory_request *reg_request, *lr; |
fe33eb39 | 1576 | |
c492db37 | 1577 | lr = get_last_request(); |
b0e2880b | 1578 | |
b2e253cf | 1579 | /* When last_request->processed becomes true this will be rescheduled */ |
c492db37 | 1580 | if (lr && !lr->processed) { |
1a919318 | 1581 | REG_DBG_PRINT("Pending regulatory request, waiting for it to be processed...\n"); |
5fe231e8 | 1582 | return; |
b2e253cf LR |
1583 | } |
1584 | ||
fe33eb39 | 1585 | spin_lock(®_requests_lock); |
fe33eb39 | 1586 | |
b2e253cf | 1587 | if (list_empty(®_requests_list)) { |
d951c1dd | 1588 | spin_unlock(®_requests_lock); |
5fe231e8 | 1589 | return; |
fe33eb39 | 1590 | } |
b2e253cf LR |
1591 | |
1592 | reg_request = list_first_entry(®_requests_list, | |
1593 | struct regulatory_request, | |
1594 | list); | |
1595 | list_del_init(®_request->list); | |
1596 | ||
fe33eb39 | 1597 | spin_unlock(®_requests_lock); |
b0e2880b | 1598 | |
8848bef0 | 1599 | reg_process_hint(reg_request, reg_request->initiator); |
fe33eb39 LR |
1600 | } |
1601 | ||
e38f8a7a LR |
1602 | /* Processes beacon hints -- this has nothing to do with country IEs */ |
1603 | static void reg_process_pending_beacon_hints(void) | |
1604 | { | |
79c97e97 | 1605 | struct cfg80211_registered_device *rdev; |
e38f8a7a LR |
1606 | struct reg_beacon *pending_beacon, *tmp; |
1607 | ||
e38f8a7a LR |
1608 | /* This goes through the _pending_ beacon list */ |
1609 | spin_lock_bh(®_pending_beacons_lock); | |
1610 | ||
e38f8a7a LR |
1611 | list_for_each_entry_safe(pending_beacon, tmp, |
1612 | ®_pending_beacons, list) { | |
e38f8a7a LR |
1613 | list_del_init(&pending_beacon->list); |
1614 | ||
1615 | /* Applies the beacon hint to current wiphys */ | |
79c97e97 JB |
1616 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) |
1617 | wiphy_update_new_beacon(&rdev->wiphy, pending_beacon); | |
e38f8a7a LR |
1618 | |
1619 | /* Remembers the beacon hint for new wiphys or reg changes */ | |
1620 | list_add_tail(&pending_beacon->list, ®_beacon_list); | |
1621 | } | |
1622 | ||
1623 | spin_unlock_bh(®_pending_beacons_lock); | |
e38f8a7a LR |
1624 | } |
1625 | ||
fe33eb39 LR |
1626 | static void reg_todo(struct work_struct *work) |
1627 | { | |
5fe231e8 | 1628 | rtnl_lock(); |
fe33eb39 | 1629 | reg_process_pending_hints(); |
e38f8a7a | 1630 | reg_process_pending_beacon_hints(); |
5fe231e8 | 1631 | rtnl_unlock(); |
fe33eb39 LR |
1632 | } |
1633 | ||
fe33eb39 LR |
1634 | static void queue_regulatory_request(struct regulatory_request *request) |
1635 | { | |
d4f2c881 JB |
1636 | request->alpha2[0] = toupper(request->alpha2[0]); |
1637 | request->alpha2[1] = toupper(request->alpha2[1]); | |
c61029c7 | 1638 | |
fe33eb39 LR |
1639 | spin_lock(®_requests_lock); |
1640 | list_add_tail(&request->list, ®_requests_list); | |
1641 | spin_unlock(®_requests_lock); | |
1642 | ||
1643 | schedule_work(®_work); | |
1644 | } | |
1645 | ||
09d989d1 LR |
1646 | /* |
1647 | * Core regulatory hint -- happens during cfg80211_init() | |
1648 | * and when we restore regulatory settings. | |
1649 | */ | |
ba25c141 LR |
1650 | static int regulatory_hint_core(const char *alpha2) |
1651 | { | |
1652 | struct regulatory_request *request; | |
1653 | ||
1a919318 | 1654 | request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); |
ba25c141 LR |
1655 | if (!request) |
1656 | return -ENOMEM; | |
1657 | ||
1658 | request->alpha2[0] = alpha2[0]; | |
1659 | request->alpha2[1] = alpha2[1]; | |
7db90f4a | 1660 | request->initiator = NL80211_REGDOM_SET_BY_CORE; |
ba25c141 | 1661 | |
31e99729 | 1662 | queue_regulatory_request(request); |
5078b2e3 | 1663 | |
fe33eb39 | 1664 | return 0; |
ba25c141 LR |
1665 | } |
1666 | ||
fe33eb39 | 1667 | /* User hints */ |
57b5ce07 LR |
1668 | int regulatory_hint_user(const char *alpha2, |
1669 | enum nl80211_user_reg_hint_type user_reg_hint_type) | |
b2e1b302 | 1670 | { |
fe33eb39 LR |
1671 | struct regulatory_request *request; |
1672 | ||
fdc9d7b2 JB |
1673 | if (WARN_ON(!alpha2)) |
1674 | return -EINVAL; | |
b2e1b302 | 1675 | |
fe33eb39 LR |
1676 | request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); |
1677 | if (!request) | |
1678 | return -ENOMEM; | |
1679 | ||
f4173766 | 1680 | request->wiphy_idx = WIPHY_IDX_INVALID; |
fe33eb39 LR |
1681 | request->alpha2[0] = alpha2[0]; |
1682 | request->alpha2[1] = alpha2[1]; | |
e12822e1 | 1683 | request->initiator = NL80211_REGDOM_SET_BY_USER; |
57b5ce07 | 1684 | request->user_reg_hint_type = user_reg_hint_type; |
fe33eb39 LR |
1685 | |
1686 | queue_regulatory_request(request); | |
1687 | ||
1688 | return 0; | |
1689 | } | |
1690 | ||
1691 | /* Driver hints */ | |
1692 | int regulatory_hint(struct wiphy *wiphy, const char *alpha2) | |
1693 | { | |
1694 | struct regulatory_request *request; | |
1695 | ||
fdc9d7b2 JB |
1696 | if (WARN_ON(!alpha2 || !wiphy)) |
1697 | return -EINVAL; | |
fe33eb39 LR |
1698 | |
1699 | request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); | |
1700 | if (!request) | |
1701 | return -ENOMEM; | |
1702 | ||
1703 | request->wiphy_idx = get_wiphy_idx(wiphy); | |
1704 | ||
fe33eb39 LR |
1705 | request->alpha2[0] = alpha2[0]; |
1706 | request->alpha2[1] = alpha2[1]; | |
7db90f4a | 1707 | request->initiator = NL80211_REGDOM_SET_BY_DRIVER; |
fe33eb39 LR |
1708 | |
1709 | queue_regulatory_request(request); | |
1710 | ||
1711 | return 0; | |
b2e1b302 LR |
1712 | } |
1713 | EXPORT_SYMBOL(regulatory_hint); | |
1714 | ||
789fd033 LR |
1715 | void regulatory_hint_country_ie(struct wiphy *wiphy, enum ieee80211_band band, |
1716 | const u8 *country_ie, u8 country_ie_len) | |
3f2355cb | 1717 | { |
3f2355cb | 1718 | char alpha2[2]; |
3f2355cb | 1719 | enum environment_cap env = ENVIRON_ANY; |
db2424c5 | 1720 | struct regulatory_request *request = NULL, *lr; |
d335fe63 | 1721 | |
3f2355cb LR |
1722 | /* IE len must be evenly divisible by 2 */ |
1723 | if (country_ie_len & 0x01) | |
db2424c5 | 1724 | return; |
3f2355cb LR |
1725 | |
1726 | if (country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN) | |
db2424c5 JB |
1727 | return; |
1728 | ||
1729 | request = kzalloc(sizeof(*request), GFP_KERNEL); | |
1730 | if (!request) | |
1731 | return; | |
3f2355cb | 1732 | |
3f2355cb LR |
1733 | alpha2[0] = country_ie[0]; |
1734 | alpha2[1] = country_ie[1]; | |
1735 | ||
1736 | if (country_ie[2] == 'I') | |
1737 | env = ENVIRON_INDOOR; | |
1738 | else if (country_ie[2] == 'O') | |
1739 | env = ENVIRON_OUTDOOR; | |
1740 | ||
db2424c5 JB |
1741 | rcu_read_lock(); |
1742 | lr = get_last_request(); | |
1743 | ||
1744 | if (unlikely(!lr)) | |
1745 | goto out; | |
1746 | ||
fb1fc7ad | 1747 | /* |
8b19e6ca | 1748 | * We will run this only upon a successful connection on cfg80211. |
4b44c8bc | 1749 | * We leave conflict resolution to the workqueue, where can hold |
5fe231e8 | 1750 | * the RTNL. |
fb1fc7ad | 1751 | */ |
c492db37 JB |
1752 | if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE && |
1753 | lr->wiphy_idx != WIPHY_IDX_INVALID) | |
4b44c8bc | 1754 | goto out; |
3f2355cb | 1755 | |
fe33eb39 | 1756 | request->wiphy_idx = get_wiphy_idx(wiphy); |
4f366c5d JL |
1757 | request->alpha2[0] = alpha2[0]; |
1758 | request->alpha2[1] = alpha2[1]; | |
7db90f4a | 1759 | request->initiator = NL80211_REGDOM_SET_BY_COUNTRY_IE; |
fe33eb39 LR |
1760 | request->country_ie_env = env; |
1761 | ||
fe33eb39 | 1762 | queue_regulatory_request(request); |
db2424c5 | 1763 | request = NULL; |
3f2355cb | 1764 | out: |
db2424c5 JB |
1765 | kfree(request); |
1766 | rcu_read_unlock(); | |
3f2355cb | 1767 | } |
b2e1b302 | 1768 | |
09d989d1 LR |
1769 | static void restore_alpha2(char *alpha2, bool reset_user) |
1770 | { | |
1771 | /* indicates there is no alpha2 to consider for restoration */ | |
1772 | alpha2[0] = '9'; | |
1773 | alpha2[1] = '7'; | |
1774 | ||
1775 | /* The user setting has precedence over the module parameter */ | |
1776 | if (is_user_regdom_saved()) { | |
1777 | /* Unless we're asked to ignore it and reset it */ | |
1778 | if (reset_user) { | |
1a919318 | 1779 | REG_DBG_PRINT("Restoring regulatory settings including user preference\n"); |
09d989d1 LR |
1780 | user_alpha2[0] = '9'; |
1781 | user_alpha2[1] = '7'; | |
1782 | ||
1783 | /* | |
1784 | * If we're ignoring user settings, we still need to | |
1785 | * check the module parameter to ensure we put things | |
1786 | * back as they were for a full restore. | |
1787 | */ | |
1788 | if (!is_world_regdom(ieee80211_regdom)) { | |
1a919318 JB |
1789 | REG_DBG_PRINT("Keeping preference on module parameter ieee80211_regdom: %c%c\n", |
1790 | ieee80211_regdom[0], ieee80211_regdom[1]); | |
09d989d1 LR |
1791 | alpha2[0] = ieee80211_regdom[0]; |
1792 | alpha2[1] = ieee80211_regdom[1]; | |
1793 | } | |
1794 | } else { | |
1a919318 JB |
1795 | REG_DBG_PRINT("Restoring regulatory settings while preserving user preference for: %c%c\n", |
1796 | user_alpha2[0], user_alpha2[1]); | |
09d989d1 LR |
1797 | alpha2[0] = user_alpha2[0]; |
1798 | alpha2[1] = user_alpha2[1]; | |
1799 | } | |
1800 | } else if (!is_world_regdom(ieee80211_regdom)) { | |
1a919318 JB |
1801 | REG_DBG_PRINT("Keeping preference on module parameter ieee80211_regdom: %c%c\n", |
1802 | ieee80211_regdom[0], ieee80211_regdom[1]); | |
09d989d1 LR |
1803 | alpha2[0] = ieee80211_regdom[0]; |
1804 | alpha2[1] = ieee80211_regdom[1]; | |
1805 | } else | |
d91e41b6 | 1806 | REG_DBG_PRINT("Restoring regulatory settings\n"); |
09d989d1 LR |
1807 | } |
1808 | ||
5ce543d1 RM |
1809 | static void restore_custom_reg_settings(struct wiphy *wiphy) |
1810 | { | |
1811 | struct ieee80211_supported_band *sband; | |
1812 | enum ieee80211_band band; | |
1813 | struct ieee80211_channel *chan; | |
1814 | int i; | |
1815 | ||
1816 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) { | |
1817 | sband = wiphy->bands[band]; | |
1818 | if (!sband) | |
1819 | continue; | |
1820 | for (i = 0; i < sband->n_channels; i++) { | |
1821 | chan = &sband->channels[i]; | |
1822 | chan->flags = chan->orig_flags; | |
1823 | chan->max_antenna_gain = chan->orig_mag; | |
1824 | chan->max_power = chan->orig_mpwr; | |
899852af | 1825 | chan->beacon_found = false; |
5ce543d1 RM |
1826 | } |
1827 | } | |
1828 | } | |
1829 | ||
09d989d1 LR |
1830 | /* |
1831 | * Restoring regulatory settings involves ingoring any | |
1832 | * possibly stale country IE information and user regulatory | |
1833 | * settings if so desired, this includes any beacon hints | |
1834 | * learned as we could have traveled outside to another country | |
1835 | * after disconnection. To restore regulatory settings we do | |
1836 | * exactly what we did at bootup: | |
1837 | * | |
1838 | * - send a core regulatory hint | |
1839 | * - send a user regulatory hint if applicable | |
1840 | * | |
1841 | * Device drivers that send a regulatory hint for a specific country | |
1842 | * keep their own regulatory domain on wiphy->regd so that does does | |
1843 | * not need to be remembered. | |
1844 | */ | |
1845 | static void restore_regulatory_settings(bool reset_user) | |
1846 | { | |
1847 | char alpha2[2]; | |
cee0bec5 | 1848 | char world_alpha2[2]; |
09d989d1 | 1849 | struct reg_beacon *reg_beacon, *btmp; |
14609555 LR |
1850 | struct regulatory_request *reg_request, *tmp; |
1851 | LIST_HEAD(tmp_reg_req_list); | |
5ce543d1 | 1852 | struct cfg80211_registered_device *rdev; |
09d989d1 | 1853 | |
5fe231e8 JB |
1854 | ASSERT_RTNL(); |
1855 | ||
2d319867 | 1856 | reset_regdomains(true, &world_regdom); |
09d989d1 LR |
1857 | restore_alpha2(alpha2, reset_user); |
1858 | ||
14609555 LR |
1859 | /* |
1860 | * If there's any pending requests we simply | |
1861 | * stash them to a temporary pending queue and | |
1862 | * add then after we've restored regulatory | |
1863 | * settings. | |
1864 | */ | |
1865 | spin_lock(®_requests_lock); | |
fea9bced JB |
1866 | list_for_each_entry_safe(reg_request, tmp, ®_requests_list, list) { |
1867 | if (reg_request->initiator != NL80211_REGDOM_SET_BY_USER) | |
1868 | continue; | |
1869 | list_move_tail(®_request->list, &tmp_reg_req_list); | |
14609555 LR |
1870 | } |
1871 | spin_unlock(®_requests_lock); | |
1872 | ||
09d989d1 LR |
1873 | /* Clear beacon hints */ |
1874 | spin_lock_bh(®_pending_beacons_lock); | |
fea9bced JB |
1875 | list_for_each_entry_safe(reg_beacon, btmp, ®_pending_beacons, list) { |
1876 | list_del(®_beacon->list); | |
1877 | kfree(reg_beacon); | |
09d989d1 LR |
1878 | } |
1879 | spin_unlock_bh(®_pending_beacons_lock); | |
1880 | ||
fea9bced JB |
1881 | list_for_each_entry_safe(reg_beacon, btmp, ®_beacon_list, list) { |
1882 | list_del(®_beacon->list); | |
1883 | kfree(reg_beacon); | |
09d989d1 LR |
1884 | } |
1885 | ||
1886 | /* First restore to the basic regulatory settings */ | |
379b82f4 JB |
1887 | world_alpha2[0] = cfg80211_world_regdom->alpha2[0]; |
1888 | world_alpha2[1] = cfg80211_world_regdom->alpha2[1]; | |
09d989d1 | 1889 | |
5ce543d1 RM |
1890 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) { |
1891 | if (rdev->wiphy.flags & WIPHY_FLAG_CUSTOM_REGULATORY) | |
1892 | restore_custom_reg_settings(&rdev->wiphy); | |
1893 | } | |
1894 | ||
cee0bec5 | 1895 | regulatory_hint_core(world_alpha2); |
09d989d1 LR |
1896 | |
1897 | /* | |
1898 | * This restores the ieee80211_regdom module parameter | |
1899 | * preference or the last user requested regulatory | |
1900 | * settings, user regulatory settings takes precedence. | |
1901 | */ | |
1902 | if (is_an_alpha2(alpha2)) | |
57b5ce07 | 1903 | regulatory_hint_user(user_alpha2, NL80211_USER_REG_HINT_USER); |
09d989d1 | 1904 | |
14609555 | 1905 | spin_lock(®_requests_lock); |
11cff96c | 1906 | list_splice_tail_init(&tmp_reg_req_list, ®_requests_list); |
14609555 LR |
1907 | spin_unlock(®_requests_lock); |
1908 | ||
14609555 LR |
1909 | REG_DBG_PRINT("Kicking the queue\n"); |
1910 | ||
1911 | schedule_work(®_work); | |
1912 | } | |
09d989d1 LR |
1913 | |
1914 | void regulatory_hint_disconnect(void) | |
1915 | { | |
1a919318 | 1916 | REG_DBG_PRINT("All devices are disconnected, going to restore regulatory settings\n"); |
09d989d1 LR |
1917 | restore_regulatory_settings(false); |
1918 | } | |
1919 | ||
e38f8a7a LR |
1920 | static bool freq_is_chan_12_13_14(u16 freq) |
1921 | { | |
59eb21a6 BR |
1922 | if (freq == ieee80211_channel_to_frequency(12, IEEE80211_BAND_2GHZ) || |
1923 | freq == ieee80211_channel_to_frequency(13, IEEE80211_BAND_2GHZ) || | |
1924 | freq == ieee80211_channel_to_frequency(14, IEEE80211_BAND_2GHZ)) | |
e38f8a7a LR |
1925 | return true; |
1926 | return false; | |
1927 | } | |
1928 | ||
3ebfa6e7 LR |
1929 | static bool pending_reg_beacon(struct ieee80211_channel *beacon_chan) |
1930 | { | |
1931 | struct reg_beacon *pending_beacon; | |
1932 | ||
1933 | list_for_each_entry(pending_beacon, ®_pending_beacons, list) | |
1934 | if (beacon_chan->center_freq == | |
1935 | pending_beacon->chan.center_freq) | |
1936 | return true; | |
1937 | return false; | |
1938 | } | |
1939 | ||
e38f8a7a LR |
1940 | int regulatory_hint_found_beacon(struct wiphy *wiphy, |
1941 | struct ieee80211_channel *beacon_chan, | |
1942 | gfp_t gfp) | |
1943 | { | |
1944 | struct reg_beacon *reg_beacon; | |
3ebfa6e7 | 1945 | bool processing; |
e38f8a7a | 1946 | |
1a919318 JB |
1947 | if (beacon_chan->beacon_found || |
1948 | beacon_chan->flags & IEEE80211_CHAN_RADAR || | |
e38f8a7a | 1949 | (beacon_chan->band == IEEE80211_BAND_2GHZ && |
1a919318 | 1950 | !freq_is_chan_12_13_14(beacon_chan->center_freq))) |
e38f8a7a LR |
1951 | return 0; |
1952 | ||
3ebfa6e7 LR |
1953 | spin_lock_bh(®_pending_beacons_lock); |
1954 | processing = pending_reg_beacon(beacon_chan); | |
1955 | spin_unlock_bh(®_pending_beacons_lock); | |
1956 | ||
1957 | if (processing) | |
e38f8a7a LR |
1958 | return 0; |
1959 | ||
1960 | reg_beacon = kzalloc(sizeof(struct reg_beacon), gfp); | |
1961 | if (!reg_beacon) | |
1962 | return -ENOMEM; | |
1963 | ||
1a919318 | 1964 | REG_DBG_PRINT("Found new beacon on frequency: %d MHz (Ch %d) on %s\n", |
4113f751 LR |
1965 | beacon_chan->center_freq, |
1966 | ieee80211_frequency_to_channel(beacon_chan->center_freq), | |
1967 | wiphy_name(wiphy)); | |
1968 | ||
e38f8a7a | 1969 | memcpy(®_beacon->chan, beacon_chan, |
1a919318 | 1970 | sizeof(struct ieee80211_channel)); |
e38f8a7a LR |
1971 | |
1972 | /* | |
1973 | * Since we can be called from BH or and non-BH context | |
1974 | * we must use spin_lock_bh() | |
1975 | */ | |
1976 | spin_lock_bh(®_pending_beacons_lock); | |
1977 | list_add_tail(®_beacon->list, ®_pending_beacons); | |
1978 | spin_unlock_bh(®_pending_beacons_lock); | |
1979 | ||
1980 | schedule_work(®_work); | |
1981 | ||
1982 | return 0; | |
1983 | } | |
1984 | ||
a3d2eaf0 | 1985 | static void print_rd_rules(const struct ieee80211_regdomain *rd) |
b2e1b302 LR |
1986 | { |
1987 | unsigned int i; | |
a3d2eaf0 JB |
1988 | const struct ieee80211_reg_rule *reg_rule = NULL; |
1989 | const struct ieee80211_freq_range *freq_range = NULL; | |
1990 | const struct ieee80211_power_rule *power_rule = NULL; | |
b2e1b302 | 1991 | |
6653325a | 1992 | pr_info(" (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)\n"); |
b2e1b302 LR |
1993 | |
1994 | for (i = 0; i < rd->n_reg_rules; i++) { | |
1995 | reg_rule = &rd->reg_rules[i]; | |
1996 | freq_range = ®_rule->freq_range; | |
1997 | power_rule = ®_rule->power_rule; | |
1998 | ||
fb1fc7ad LR |
1999 | /* |
2000 | * There may not be documentation for max antenna gain | |
2001 | * in certain regions | |
2002 | */ | |
b2e1b302 | 2003 | if (power_rule->max_antenna_gain) |
6653325a | 2004 | pr_info(" (%d KHz - %d KHz @ %d KHz), (%d mBi, %d mBm)\n", |
b2e1b302 LR |
2005 | freq_range->start_freq_khz, |
2006 | freq_range->end_freq_khz, | |
2007 | freq_range->max_bandwidth_khz, | |
2008 | power_rule->max_antenna_gain, | |
2009 | power_rule->max_eirp); | |
2010 | else | |
6653325a | 2011 | pr_info(" (%d KHz - %d KHz @ %d KHz), (N/A, %d mBm)\n", |
b2e1b302 LR |
2012 | freq_range->start_freq_khz, |
2013 | freq_range->end_freq_khz, | |
2014 | freq_range->max_bandwidth_khz, | |
2015 | power_rule->max_eirp); | |
2016 | } | |
2017 | } | |
2018 | ||
8b60b078 LR |
2019 | bool reg_supported_dfs_region(u8 dfs_region) |
2020 | { | |
2021 | switch (dfs_region) { | |
2022 | case NL80211_DFS_UNSET: | |
2023 | case NL80211_DFS_FCC: | |
2024 | case NL80211_DFS_ETSI: | |
2025 | case NL80211_DFS_JP: | |
2026 | return true; | |
2027 | default: | |
2028 | REG_DBG_PRINT("Ignoring uknown DFS master region: %d\n", | |
2029 | dfs_region); | |
2030 | return false; | |
2031 | } | |
2032 | } | |
2033 | ||
2034 | static void print_dfs_region(u8 dfs_region) | |
2035 | { | |
2036 | if (!dfs_region) | |
2037 | return; | |
2038 | ||
2039 | switch (dfs_region) { | |
2040 | case NL80211_DFS_FCC: | |
2041 | pr_info(" DFS Master region FCC"); | |
2042 | break; | |
2043 | case NL80211_DFS_ETSI: | |
2044 | pr_info(" DFS Master region ETSI"); | |
2045 | break; | |
2046 | case NL80211_DFS_JP: | |
2047 | pr_info(" DFS Master region JP"); | |
2048 | break; | |
2049 | default: | |
1a919318 | 2050 | pr_info(" DFS Master region Unknown"); |
8b60b078 LR |
2051 | break; |
2052 | } | |
2053 | } | |
2054 | ||
a3d2eaf0 | 2055 | static void print_regdomain(const struct ieee80211_regdomain *rd) |
b2e1b302 | 2056 | { |
c492db37 | 2057 | struct regulatory_request *lr = get_last_request(); |
b2e1b302 | 2058 | |
3f2355cb | 2059 | if (is_intersected_alpha2(rd->alpha2)) { |
c492db37 | 2060 | if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) { |
79c97e97 | 2061 | struct cfg80211_registered_device *rdev; |
c492db37 | 2062 | rdev = cfg80211_rdev_by_wiphy_idx(lr->wiphy_idx); |
79c97e97 | 2063 | if (rdev) { |
e9c0268f | 2064 | pr_info("Current regulatory domain updated by AP to: %c%c\n", |
79c97e97 JB |
2065 | rdev->country_ie_alpha2[0], |
2066 | rdev->country_ie_alpha2[1]); | |
3f2355cb | 2067 | } else |
e9c0268f | 2068 | pr_info("Current regulatory domain intersected:\n"); |
3f2355cb | 2069 | } else |
e9c0268f | 2070 | pr_info("Current regulatory domain intersected:\n"); |
1a919318 | 2071 | } else if (is_world_regdom(rd->alpha2)) { |
e9c0268f | 2072 | pr_info("World regulatory domain updated:\n"); |
1a919318 | 2073 | } else { |
b2e1b302 | 2074 | if (is_unknown_alpha2(rd->alpha2)) |
e9c0268f | 2075 | pr_info("Regulatory domain changed to driver built-in settings (unknown country)\n"); |
57b5ce07 | 2076 | else { |
c492db37 | 2077 | if (reg_request_cell_base(lr)) |
1a919318 | 2078 | pr_info("Regulatory domain changed to country: %c%c by Cell Station\n", |
57b5ce07 LR |
2079 | rd->alpha2[0], rd->alpha2[1]); |
2080 | else | |
1a919318 | 2081 | pr_info("Regulatory domain changed to country: %c%c\n", |
57b5ce07 LR |
2082 | rd->alpha2[0], rd->alpha2[1]); |
2083 | } | |
b2e1b302 | 2084 | } |
1a919318 | 2085 | |
8b60b078 | 2086 | print_dfs_region(rd->dfs_region); |
b2e1b302 LR |
2087 | print_rd_rules(rd); |
2088 | } | |
2089 | ||
2df78167 | 2090 | static void print_regdomain_info(const struct ieee80211_regdomain *rd) |
b2e1b302 | 2091 | { |
e9c0268f | 2092 | pr_info("Regulatory domain: %c%c\n", rd->alpha2[0], rd->alpha2[1]); |
b2e1b302 LR |
2093 | print_rd_rules(rd); |
2094 | } | |
2095 | ||
d2372b31 | 2096 | /* Takes ownership of rd only if it doesn't fail */ |
a3d2eaf0 | 2097 | static int __set_regdom(const struct ieee80211_regdomain *rd) |
b2e1b302 | 2098 | { |
e9763c3c | 2099 | const struct ieee80211_regdomain *regd; |
9c96477d | 2100 | const struct ieee80211_regdomain *intersected_rd = NULL; |
806a9e39 | 2101 | struct wiphy *request_wiphy; |
c492db37 | 2102 | struct regulatory_request *lr = get_last_request(); |
6913b49a | 2103 | |
b2e1b302 LR |
2104 | /* Some basic sanity checks first */ |
2105 | ||
6913b49a JB |
2106 | if (!reg_is_valid_request(rd->alpha2)) |
2107 | return -EINVAL; | |
2108 | ||
b2e1b302 | 2109 | if (is_world_regdom(rd->alpha2)) { |
b2e1b302 LR |
2110 | update_world_regdomain(rd); |
2111 | return 0; | |
2112 | } | |
b2e1b302 LR |
2113 | |
2114 | if (!is_alpha2_set(rd->alpha2) && !is_an_alpha2(rd->alpha2) && | |
1a919318 | 2115 | !is_unknown_alpha2(rd->alpha2)) |
b2e1b302 LR |
2116 | return -EINVAL; |
2117 | ||
fb1fc7ad LR |
2118 | /* |
2119 | * Lets only bother proceeding on the same alpha2 if the current | |
3f2355cb | 2120 | * rd is non static (it means CRDA was present and was used last) |
fb1fc7ad LR |
2121 | * and the pending request came in from a country IE |
2122 | */ | |
c492db37 | 2123 | if (lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE) { |
fb1fc7ad LR |
2124 | /* |
2125 | * If someone else asked us to change the rd lets only bother | |
2126 | * checking if the alpha2 changes if CRDA was already called | |
2127 | */ | |
baeb66fe | 2128 | if (!regdom_changes(rd->alpha2)) |
95908535 | 2129 | return -EALREADY; |
3f2355cb LR |
2130 | } |
2131 | ||
fb1fc7ad LR |
2132 | /* |
2133 | * Now lets set the regulatory domain, update all driver channels | |
b2e1b302 LR |
2134 | * and finally inform them of what we have done, in case they want |
2135 | * to review or adjust their own settings based on their own | |
fb1fc7ad LR |
2136 | * internal EEPROM data |
2137 | */ | |
b2e1b302 | 2138 | |
8375af3b | 2139 | if (!is_valid_rd(rd)) { |
e9c0268f | 2140 | pr_err("Invalid regulatory domain detected:\n"); |
8375af3b LR |
2141 | print_regdomain_info(rd); |
2142 | return -EINVAL; | |
b2e1b302 LR |
2143 | } |
2144 | ||
c492db37 | 2145 | request_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx); |
0bac71af | 2146 | if (!request_wiphy && |
c492db37 JB |
2147 | (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER || |
2148 | lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE)) { | |
0bac71af | 2149 | schedule_delayed_work(®_timeout, 0); |
de3584bd JB |
2150 | return -ENODEV; |
2151 | } | |
806a9e39 | 2152 | |
c492db37 JB |
2153 | if (!lr->intersect) { |
2154 | if (lr->initiator != NL80211_REGDOM_SET_BY_DRIVER) { | |
379b82f4 | 2155 | reset_regdomains(false, rd); |
3e0c3ff3 LR |
2156 | return 0; |
2157 | } | |
2158 | ||
fb1fc7ad LR |
2159 | /* |
2160 | * For a driver hint, lets copy the regulatory domain the | |
2161 | * driver wanted to the wiphy to deal with conflicts | |
2162 | */ | |
3e0c3ff3 | 2163 | |
558f6d32 LR |
2164 | /* |
2165 | * Userspace could have sent two replies with only | |
2166 | * one kernel request. | |
2167 | */ | |
2168 | if (request_wiphy->regd) | |
2169 | return -EALREADY; | |
3e0c3ff3 | 2170 | |
e9763c3c JB |
2171 | regd = reg_copy_regd(rd); |
2172 | if (IS_ERR(regd)) | |
2173 | return PTR_ERR(regd); | |
3e0c3ff3 | 2174 | |
458f4f9e | 2175 | rcu_assign_pointer(request_wiphy->regd, regd); |
379b82f4 | 2176 | reset_regdomains(false, rd); |
b8295acd LR |
2177 | return 0; |
2178 | } | |
2179 | ||
2180 | /* Intersection requires a bit more work */ | |
2181 | ||
c492db37 | 2182 | if (lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE) { |
458f4f9e | 2183 | intersected_rd = regdom_intersect(rd, get_cfg80211_regdom()); |
9c96477d LR |
2184 | if (!intersected_rd) |
2185 | return -EINVAL; | |
b8295acd | 2186 | |
fb1fc7ad LR |
2187 | /* |
2188 | * We can trash what CRDA provided now. | |
3e0c3ff3 | 2189 | * However if a driver requested this specific regulatory |
fb1fc7ad LR |
2190 | * domain we keep it for its private use |
2191 | */ | |
b7566fc3 LF |
2192 | if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER) { |
2193 | const struct ieee80211_regdomain *tmp; | |
2194 | ||
2195 | tmp = get_wiphy_regdom(request_wiphy); | |
458f4f9e | 2196 | rcu_assign_pointer(request_wiphy->regd, rd); |
b7566fc3 LF |
2197 | rcu_free_regdom(tmp); |
2198 | } else { | |
3e0c3ff3 | 2199 | kfree(rd); |
b7566fc3 | 2200 | } |
3e0c3ff3 | 2201 | |
b8295acd LR |
2202 | rd = NULL; |
2203 | ||
379b82f4 | 2204 | reset_regdomains(false, intersected_rd); |
b8295acd LR |
2205 | |
2206 | return 0; | |
9c96477d LR |
2207 | } |
2208 | ||
f3baed51 | 2209 | return -EINVAL; |
b2e1b302 LR |
2210 | } |
2211 | ||
2212 | ||
fb1fc7ad LR |
2213 | /* |
2214 | * Use this call to set the current regulatory domain. Conflicts with | |
b2e1b302 | 2215 | * multiple drivers can be ironed out later. Caller must've already |
458f4f9e | 2216 | * kmalloc'd the rd structure. |
fb1fc7ad | 2217 | */ |
a3d2eaf0 | 2218 | int set_regdom(const struct ieee80211_regdomain *rd) |
b2e1b302 | 2219 | { |
c492db37 | 2220 | struct regulatory_request *lr; |
b2e1b302 LR |
2221 | int r; |
2222 | ||
c492db37 | 2223 | lr = get_last_request(); |
abc7381b | 2224 | |
b2e1b302 LR |
2225 | /* Note that this doesn't update the wiphys, this is done below */ |
2226 | r = __set_regdom(rd); | |
d2372b31 | 2227 | if (r) { |
95908535 KV |
2228 | if (r == -EALREADY) |
2229 | reg_set_request_processed(); | |
2230 | ||
d2372b31 | 2231 | kfree(rd); |
38fd2143 | 2232 | return r; |
d2372b31 | 2233 | } |
b2e1b302 | 2234 | |
b2e1b302 | 2235 | /* This would make this whole thing pointless */ |
38fd2143 JB |
2236 | if (WARN_ON(!lr->intersect && rd != get_cfg80211_regdom())) |
2237 | return -EINVAL; | |
b2e1b302 LR |
2238 | |
2239 | /* update all wiphys now with the new established regulatory domain */ | |
c492db37 | 2240 | update_all_wiphy_regulatory(lr->initiator); |
b2e1b302 | 2241 | |
458f4f9e | 2242 | print_regdomain(get_cfg80211_regdom()); |
b2e1b302 | 2243 | |
c492db37 | 2244 | nl80211_send_reg_change_event(lr); |
73d54c9e | 2245 | |
b2e253cf LR |
2246 | reg_set_request_processed(); |
2247 | ||
38fd2143 | 2248 | return 0; |
b2e1b302 LR |
2249 | } |
2250 | ||
4d9d88d1 SJR |
2251 | int reg_device_uevent(struct device *dev, struct kobj_uevent_env *env) |
2252 | { | |
4a484cff JB |
2253 | struct regulatory_request *lr; |
2254 | u8 alpha2[2]; | |
2255 | bool add = false; | |
c492db37 | 2256 | |
4a484cff JB |
2257 | rcu_read_lock(); |
2258 | lr = get_last_request(); | |
c492db37 | 2259 | if (lr && !lr->processed) { |
4a484cff JB |
2260 | memcpy(alpha2, lr->alpha2, 2); |
2261 | add = true; | |
4d9d88d1 | 2262 | } |
4a484cff | 2263 | rcu_read_unlock(); |
4d9d88d1 | 2264 | |
4a484cff JB |
2265 | if (add) |
2266 | return add_uevent_var(env, "COUNTRY=%c%c", | |
2267 | alpha2[0], alpha2[1]); | |
4d9d88d1 SJR |
2268 | return 0; |
2269 | } | |
4d9d88d1 | 2270 | |
57b5ce07 LR |
2271 | void wiphy_regulatory_register(struct wiphy *wiphy) |
2272 | { | |
23df0b73 AN |
2273 | struct regulatory_request *lr; |
2274 | ||
57b5ce07 LR |
2275 | if (!reg_dev_ignore_cell_hint(wiphy)) |
2276 | reg_num_devs_support_basehint++; | |
2277 | ||
23df0b73 AN |
2278 | lr = get_last_request(); |
2279 | wiphy_update_regulatory(wiphy, lr->initiator); | |
57b5ce07 LR |
2280 | } |
2281 | ||
bfead080 | 2282 | void wiphy_regulatory_deregister(struct wiphy *wiphy) |
3f2355cb | 2283 | { |
0ad8acaf | 2284 | struct wiphy *request_wiphy = NULL; |
c492db37 | 2285 | struct regulatory_request *lr; |
761cf7ec | 2286 | |
c492db37 | 2287 | lr = get_last_request(); |
abc7381b | 2288 | |
57b5ce07 LR |
2289 | if (!reg_dev_ignore_cell_hint(wiphy)) |
2290 | reg_num_devs_support_basehint--; | |
2291 | ||
458f4f9e JB |
2292 | rcu_free_regdom(get_wiphy_regdom(wiphy)); |
2293 | rcu_assign_pointer(wiphy->regd, NULL); | |
0ef9ccdd | 2294 | |
c492db37 JB |
2295 | if (lr) |
2296 | request_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx); | |
806a9e39 | 2297 | |
0ef9ccdd | 2298 | if (!request_wiphy || request_wiphy != wiphy) |
38fd2143 | 2299 | return; |
0ef9ccdd | 2300 | |
c492db37 JB |
2301 | lr->wiphy_idx = WIPHY_IDX_INVALID; |
2302 | lr->country_ie_env = ENVIRON_ANY; | |
3f2355cb LR |
2303 | } |
2304 | ||
a90c7a31 LR |
2305 | static void reg_timeout_work(struct work_struct *work) |
2306 | { | |
1a919318 | 2307 | REG_DBG_PRINT("Timeout while waiting for CRDA to reply, restoring regulatory settings\n"); |
f77b86d7 | 2308 | rtnl_lock(); |
a90c7a31 | 2309 | restore_regulatory_settings(true); |
f77b86d7 | 2310 | rtnl_unlock(); |
a90c7a31 LR |
2311 | } |
2312 | ||
2fcc9f73 | 2313 | int __init regulatory_init(void) |
b2e1b302 | 2314 | { |
bcf4f99b | 2315 | int err = 0; |
734366de | 2316 | |
b2e1b302 LR |
2317 | reg_pdev = platform_device_register_simple("regulatory", 0, NULL, 0); |
2318 | if (IS_ERR(reg_pdev)) | |
2319 | return PTR_ERR(reg_pdev); | |
734366de | 2320 | |
4d9d88d1 SJR |
2321 | reg_pdev->dev.type = ®_device_type; |
2322 | ||
fe33eb39 | 2323 | spin_lock_init(®_requests_lock); |
e38f8a7a | 2324 | spin_lock_init(®_pending_beacons_lock); |
fe33eb39 | 2325 | |
80007efe LR |
2326 | reg_regdb_size_check(); |
2327 | ||
458f4f9e | 2328 | rcu_assign_pointer(cfg80211_regdomain, cfg80211_world_regdom); |
734366de | 2329 | |
09d989d1 LR |
2330 | user_alpha2[0] = '9'; |
2331 | user_alpha2[1] = '7'; | |
2332 | ||
ae9e4b0d | 2333 | /* We always try to get an update for the static regdomain */ |
458f4f9e | 2334 | err = regulatory_hint_core(cfg80211_world_regdom->alpha2); |
ba25c141 | 2335 | if (err) { |
bcf4f99b LR |
2336 | if (err == -ENOMEM) |
2337 | return err; | |
2338 | /* | |
2339 | * N.B. kobject_uevent_env() can fail mainly for when we're out | |
2340 | * memory which is handled and propagated appropriately above | |
2341 | * but it can also fail during a netlink_broadcast() or during | |
2342 | * early boot for call_usermodehelper(). For now treat these | |
2343 | * errors as non-fatal. | |
2344 | */ | |
e9c0268f | 2345 | pr_err("kobject_uevent_env() was unable to call CRDA during init\n"); |
bcf4f99b | 2346 | } |
734366de | 2347 | |
ae9e4b0d LR |
2348 | /* |
2349 | * Finally, if the user set the module parameter treat it | |
2350 | * as a user hint. | |
2351 | */ | |
2352 | if (!is_world_regdom(ieee80211_regdom)) | |
57b5ce07 LR |
2353 | regulatory_hint_user(ieee80211_regdom, |
2354 | NL80211_USER_REG_HINT_USER); | |
ae9e4b0d | 2355 | |
b2e1b302 LR |
2356 | return 0; |
2357 | } | |
2358 | ||
1a919318 | 2359 | void regulatory_exit(void) |
b2e1b302 | 2360 | { |
fe33eb39 | 2361 | struct regulatory_request *reg_request, *tmp; |
e38f8a7a | 2362 | struct reg_beacon *reg_beacon, *btmp; |
fe33eb39 LR |
2363 | |
2364 | cancel_work_sync(®_work); | |
a90c7a31 | 2365 | cancel_delayed_work_sync(®_timeout); |
fe33eb39 | 2366 | |
9027b149 | 2367 | /* Lock to suppress warnings */ |
38fd2143 | 2368 | rtnl_lock(); |
379b82f4 | 2369 | reset_regdomains(true, NULL); |
38fd2143 | 2370 | rtnl_unlock(); |
734366de | 2371 | |
58ebacc6 | 2372 | dev_set_uevent_suppress(®_pdev->dev, true); |
f6037d09 | 2373 | |
b2e1b302 | 2374 | platform_device_unregister(reg_pdev); |
734366de | 2375 | |
fea9bced JB |
2376 | list_for_each_entry_safe(reg_beacon, btmp, ®_pending_beacons, list) { |
2377 | list_del(®_beacon->list); | |
2378 | kfree(reg_beacon); | |
e38f8a7a | 2379 | } |
e38f8a7a | 2380 | |
fea9bced JB |
2381 | list_for_each_entry_safe(reg_beacon, btmp, ®_beacon_list, list) { |
2382 | list_del(®_beacon->list); | |
2383 | kfree(reg_beacon); | |
e38f8a7a LR |
2384 | } |
2385 | ||
fea9bced JB |
2386 | list_for_each_entry_safe(reg_request, tmp, ®_requests_list, list) { |
2387 | list_del(®_request->list); | |
2388 | kfree(reg_request); | |
fe33eb39 | 2389 | } |
8318d78a | 2390 | } |