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Commit | Line | Data |
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8318d78a JB |
1 | /* |
2 | * Copyright 2002-2005, Instant802 Networks, Inc. | |
3 | * Copyright 2005-2006, Devicescape Software, Inc. | |
4 | * Copyright 2007 Johannes Berg <johannes@sipsolutions.net> | |
3b77d5ec | 5 | * Copyright 2008-2011 Luis R. Rodriguez <mcgrof@qca.qualcomm.com> |
8318d78a | 6 | * |
3b77d5ec LR |
7 | * Permission to use, copy, modify, and/or distribute this software for any |
8 | * purpose with or without fee is hereby granted, provided that the above | |
9 | * copyright notice and this permission notice appear in all copies. | |
10 | * | |
11 | * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES | |
12 | * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF | |
13 | * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR | |
14 | * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES | |
15 | * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN | |
16 | * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF | |
17 | * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. | |
8318d78a JB |
18 | */ |
19 | ||
3b77d5ec | 20 | |
b2e1b302 LR |
21 | /** |
22 | * DOC: Wireless regulatory infrastructure | |
8318d78a JB |
23 | * |
24 | * The usual implementation is for a driver to read a device EEPROM to | |
25 | * determine which regulatory domain it should be operating under, then | |
26 | * looking up the allowable channels in a driver-local table and finally | |
27 | * registering those channels in the wiphy structure. | |
28 | * | |
b2e1b302 LR |
29 | * Another set of compliance enforcement is for drivers to use their |
30 | * own compliance limits which can be stored on the EEPROM. The host | |
31 | * driver or firmware may ensure these are used. | |
32 | * | |
33 | * In addition to all this we provide an extra layer of regulatory | |
34 | * conformance. For drivers which do not have any regulatory | |
35 | * information CRDA provides the complete regulatory solution. | |
36 | * For others it provides a community effort on further restrictions | |
37 | * to enhance compliance. | |
38 | * | |
39 | * Note: When number of rules --> infinity we will not be able to | |
40 | * index on alpha2 any more, instead we'll probably have to | |
41 | * rely on some SHA1 checksum of the regdomain for example. | |
42 | * | |
8318d78a | 43 | */ |
e9c0268f JP |
44 | |
45 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt | |
46 | ||
8318d78a | 47 | #include <linux/kernel.h> |
bc3b2d7f | 48 | #include <linux/export.h> |
5a0e3ad6 | 49 | #include <linux/slab.h> |
b2e1b302 | 50 | #include <linux/list.h> |
c61029c7 | 51 | #include <linux/ctype.h> |
b2e1b302 LR |
52 | #include <linux/nl80211.h> |
53 | #include <linux/platform_device.h> | |
d9b93842 | 54 | #include <linux/moduleparam.h> |
b2e1b302 | 55 | #include <net/cfg80211.h> |
8318d78a | 56 | #include "core.h" |
b2e1b302 | 57 | #include "reg.h" |
3b377ea9 | 58 | #include "regdb.h" |
73d54c9e | 59 | #include "nl80211.h" |
8318d78a | 60 | |
4113f751 | 61 | #ifdef CONFIG_CFG80211_REG_DEBUG |
12c5ffb5 JP |
62 | #define REG_DBG_PRINT(format, args...) \ |
63 | printk(KERN_DEBUG pr_fmt(format), ##args) | |
4113f751 | 64 | #else |
8271195e | 65 | #define REG_DBG_PRINT(args...) |
4113f751 LR |
66 | #endif |
67 | ||
2f92212b JB |
68 | enum reg_request_treatment { |
69 | REG_REQ_OK, | |
70 | REG_REQ_IGNORE, | |
71 | REG_REQ_INTERSECT, | |
72 | REG_REQ_ALREADY_SET, | |
73 | }; | |
74 | ||
a042994d LR |
75 | static struct regulatory_request core_request_world = { |
76 | .initiator = NL80211_REGDOM_SET_BY_CORE, | |
77 | .alpha2[0] = '0', | |
78 | .alpha2[1] = '0', | |
79 | .intersect = false, | |
80 | .processed = true, | |
81 | .country_ie_env = ENVIRON_ANY, | |
82 | }; | |
83 | ||
38fd2143 JB |
84 | /* |
85 | * Receipt of information from last regulatory request, | |
86 | * protected by RTNL (and can be accessed with RCU protection) | |
87 | */ | |
c492db37 JB |
88 | static struct regulatory_request __rcu *last_request = |
89 | (void __rcu *)&core_request_world; | |
734366de | 90 | |
b2e1b302 LR |
91 | /* To trigger userspace events */ |
92 | static struct platform_device *reg_pdev; | |
8318d78a | 93 | |
f1e3d556 | 94 | static const struct device_type reg_device_type = { |
4d9d88d1 SJR |
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 | ||
3ef121b5 LR |
123 | static const char *reg_dfs_region_str(enum nl80211_dfs_regions dfs_region) |
124 | { | |
125 | switch (dfs_region) { | |
126 | case NL80211_DFS_UNSET: | |
127 | return "unset"; | |
128 | case NL80211_DFS_FCC: | |
129 | return "FCC"; | |
130 | case NL80211_DFS_ETSI: | |
131 | return "ETSI"; | |
132 | case NL80211_DFS_JP: | |
133 | return "JP"; | |
134 | } | |
135 | return "Unknown"; | |
136 | } | |
137 | ||
6c474799 LR |
138 | enum nl80211_dfs_regions reg_get_dfs_region(struct wiphy *wiphy) |
139 | { | |
140 | const struct ieee80211_regdomain *regd = NULL; | |
141 | const struct ieee80211_regdomain *wiphy_regd = NULL; | |
142 | ||
143 | regd = get_cfg80211_regdom(); | |
144 | if (!wiphy) | |
145 | goto out; | |
146 | ||
147 | wiphy_regd = get_wiphy_regdom(wiphy); | |
148 | if (!wiphy_regd) | |
149 | goto out; | |
150 | ||
151 | if (wiphy_regd->dfs_region == regd->dfs_region) | |
152 | goto out; | |
153 | ||
154 | REG_DBG_PRINT("%s: device specific dfs_region " | |
155 | "(%s) disagrees with cfg80211's " | |
156 | "central dfs_region (%s)\n", | |
157 | dev_name(&wiphy->dev), | |
158 | reg_dfs_region_str(wiphy_regd->dfs_region), | |
159 | reg_dfs_region_str(regd->dfs_region)); | |
160 | ||
161 | out: | |
162 | return regd->dfs_region; | |
163 | } | |
164 | ||
458f4f9e JB |
165 | static void rcu_free_regdom(const struct ieee80211_regdomain *r) |
166 | { | |
167 | if (!r) | |
168 | return; | |
169 | kfree_rcu((struct ieee80211_regdomain *)r, rcu_head); | |
170 | } | |
171 | ||
c492db37 JB |
172 | static struct regulatory_request *get_last_request(void) |
173 | { | |
38fd2143 | 174 | return rcu_dereference_rtnl(last_request); |
c492db37 JB |
175 | } |
176 | ||
e38f8a7a | 177 | /* Used to queue up regulatory hints */ |
fe33eb39 LR |
178 | static LIST_HEAD(reg_requests_list); |
179 | static spinlock_t reg_requests_lock; | |
180 | ||
e38f8a7a LR |
181 | /* Used to queue up beacon hints for review */ |
182 | static LIST_HEAD(reg_pending_beacons); | |
183 | static spinlock_t reg_pending_beacons_lock; | |
184 | ||
185 | /* Used to keep track of processed beacon hints */ | |
186 | static LIST_HEAD(reg_beacon_list); | |
187 | ||
188 | struct reg_beacon { | |
189 | struct list_head list; | |
190 | struct ieee80211_channel chan; | |
191 | }; | |
192 | ||
f333a7a2 LR |
193 | static void reg_todo(struct work_struct *work); |
194 | static DECLARE_WORK(reg_work, reg_todo); | |
195 | ||
a90c7a31 LR |
196 | static void reg_timeout_work(struct work_struct *work); |
197 | static DECLARE_DELAYED_WORK(reg_timeout, reg_timeout_work); | |
198 | ||
734366de JB |
199 | /* We keep a static world regulatory domain in case of the absence of CRDA */ |
200 | static const struct ieee80211_regdomain world_regdom = { | |
90cdc6df | 201 | .n_reg_rules = 6, |
734366de JB |
202 | .alpha2 = "00", |
203 | .reg_rules = { | |
68798a62 LR |
204 | /* IEEE 802.11b/g, channels 1..11 */ |
205 | REG_RULE(2412-10, 2462+10, 40, 6, 20, 0), | |
43c771a1 JB |
206 | /* IEEE 802.11b/g, channels 12..13. */ |
207 | REG_RULE(2467-10, 2472+10, 40, 6, 20, | |
8fe02e16 | 208 | NL80211_RRF_NO_IR), |
611b6a82 LR |
209 | /* IEEE 802.11 channel 14 - Only JP enables |
210 | * this and for 802.11b only */ | |
211 | REG_RULE(2484-10, 2484+10, 20, 6, 20, | |
8fe02e16 | 212 | NL80211_RRF_NO_IR | |
611b6a82 LR |
213 | NL80211_RRF_NO_OFDM), |
214 | /* IEEE 802.11a, channel 36..48 */ | |
131a19bc | 215 | REG_RULE(5180-10, 5240+10, 160, 6, 20, |
8fe02e16 | 216 | NL80211_RRF_NO_IR), |
3fc71f77 | 217 | |
131a19bc JB |
218 | /* IEEE 802.11a, channel 52..64 - DFS required */ |
219 | REG_RULE(5260-10, 5320+10, 160, 6, 20, | |
8fe02e16 | 220 | NL80211_RRF_NO_IR | |
131a19bc JB |
221 | NL80211_RRF_DFS), |
222 | ||
223 | /* IEEE 802.11a, channel 100..144 - DFS required */ | |
224 | REG_RULE(5500-10, 5720+10, 160, 6, 20, | |
8fe02e16 | 225 | NL80211_RRF_NO_IR | |
131a19bc | 226 | NL80211_RRF_DFS), |
3fc71f77 LR |
227 | |
228 | /* IEEE 802.11a, channel 149..165 */ | |
8ab9d85c | 229 | REG_RULE(5745-10, 5825+10, 80, 6, 20, |
8fe02e16 | 230 | NL80211_RRF_NO_IR), |
90cdc6df VK |
231 | |
232 | /* IEEE 802.11ad (60gHz), channels 1..3 */ | |
233 | REG_RULE(56160+2160*1-1080, 56160+2160*3+1080, 2160, 0, 0, 0), | |
734366de JB |
234 | } |
235 | }; | |
236 | ||
38fd2143 | 237 | /* protected by RTNL */ |
a3d2eaf0 JB |
238 | static const struct ieee80211_regdomain *cfg80211_world_regdom = |
239 | &world_regdom; | |
734366de | 240 | |
6ee7d330 | 241 | static char *ieee80211_regdom = "00"; |
09d989d1 | 242 | static char user_alpha2[2]; |
6ee7d330 | 243 | |
734366de JB |
244 | module_param(ieee80211_regdom, charp, 0444); |
245 | MODULE_PARM_DESC(ieee80211_regdom, "IEEE 802.11 regulatory domain code"); | |
246 | ||
5ad6ef5e LR |
247 | static void reg_kfree_last_request(void) |
248 | { | |
249 | struct regulatory_request *lr; | |
250 | ||
251 | lr = get_last_request(); | |
252 | ||
253 | if (lr != &core_request_world && lr) | |
254 | kfree_rcu(lr, rcu_head); | |
255 | } | |
256 | ||
05f1a3ea LR |
257 | static void reg_update_last_request(struct regulatory_request *request) |
258 | { | |
259 | reg_kfree_last_request(); | |
260 | rcu_assign_pointer(last_request, request); | |
261 | } | |
262 | ||
379b82f4 JB |
263 | static void reset_regdomains(bool full_reset, |
264 | const struct ieee80211_regdomain *new_regdom) | |
734366de | 265 | { |
458f4f9e JB |
266 | const struct ieee80211_regdomain *r; |
267 | ||
38fd2143 | 268 | ASSERT_RTNL(); |
e8da2bb4 | 269 | |
458f4f9e JB |
270 | r = get_cfg80211_regdom(); |
271 | ||
942b25cf | 272 | /* avoid freeing static information or freeing something twice */ |
458f4f9e JB |
273 | if (r == cfg80211_world_regdom) |
274 | r = NULL; | |
942b25cf JB |
275 | if (cfg80211_world_regdom == &world_regdom) |
276 | cfg80211_world_regdom = NULL; | |
458f4f9e JB |
277 | if (r == &world_regdom) |
278 | r = NULL; | |
942b25cf | 279 | |
458f4f9e JB |
280 | rcu_free_regdom(r); |
281 | rcu_free_regdom(cfg80211_world_regdom); | |
734366de | 282 | |
a3d2eaf0 | 283 | cfg80211_world_regdom = &world_regdom; |
458f4f9e | 284 | rcu_assign_pointer(cfg80211_regdomain, new_regdom); |
a042994d LR |
285 | |
286 | if (!full_reset) | |
287 | return; | |
288 | ||
05f1a3ea | 289 | reg_update_last_request(&core_request_world); |
734366de JB |
290 | } |
291 | ||
fb1fc7ad LR |
292 | /* |
293 | * Dynamic world regulatory domain requested by the wireless | |
294 | * core upon initialization | |
295 | */ | |
a3d2eaf0 | 296 | static void update_world_regdomain(const struct ieee80211_regdomain *rd) |
734366de | 297 | { |
c492db37 | 298 | struct regulatory_request *lr; |
734366de | 299 | |
c492db37 JB |
300 | lr = get_last_request(); |
301 | ||
302 | WARN_ON(!lr); | |
734366de | 303 | |
379b82f4 | 304 | reset_regdomains(false, rd); |
734366de JB |
305 | |
306 | cfg80211_world_regdom = rd; | |
734366de | 307 | } |
734366de | 308 | |
a3d2eaf0 | 309 | bool is_world_regdom(const char *alpha2) |
b2e1b302 LR |
310 | { |
311 | if (!alpha2) | |
312 | return false; | |
1a919318 | 313 | return alpha2[0] == '0' && alpha2[1] == '0'; |
b2e1b302 | 314 | } |
8318d78a | 315 | |
a3d2eaf0 | 316 | static bool is_alpha2_set(const char *alpha2) |
b2e1b302 LR |
317 | { |
318 | if (!alpha2) | |
319 | return false; | |
1a919318 | 320 | return alpha2[0] && alpha2[1]; |
b2e1b302 | 321 | } |
8318d78a | 322 | |
a3d2eaf0 | 323 | static bool is_unknown_alpha2(const char *alpha2) |
b2e1b302 LR |
324 | { |
325 | if (!alpha2) | |
326 | return false; | |
fb1fc7ad LR |
327 | /* |
328 | * Special case where regulatory domain was built by driver | |
329 | * but a specific alpha2 cannot be determined | |
330 | */ | |
1a919318 | 331 | return alpha2[0] == '9' && alpha2[1] == '9'; |
b2e1b302 | 332 | } |
8318d78a | 333 | |
3f2355cb LR |
334 | static bool is_intersected_alpha2(const char *alpha2) |
335 | { | |
336 | if (!alpha2) | |
337 | return false; | |
fb1fc7ad LR |
338 | /* |
339 | * Special case where regulatory domain is the | |
3f2355cb | 340 | * result of an intersection between two regulatory domain |
fb1fc7ad LR |
341 | * structures |
342 | */ | |
1a919318 | 343 | return alpha2[0] == '9' && alpha2[1] == '8'; |
3f2355cb LR |
344 | } |
345 | ||
a3d2eaf0 | 346 | static bool is_an_alpha2(const char *alpha2) |
b2e1b302 LR |
347 | { |
348 | if (!alpha2) | |
349 | return false; | |
1a919318 | 350 | return isalpha(alpha2[0]) && isalpha(alpha2[1]); |
b2e1b302 | 351 | } |
8318d78a | 352 | |
a3d2eaf0 | 353 | static bool alpha2_equal(const char *alpha2_x, const char *alpha2_y) |
b2e1b302 LR |
354 | { |
355 | if (!alpha2_x || !alpha2_y) | |
356 | return false; | |
1a919318 | 357 | return alpha2_x[0] == alpha2_y[0] && alpha2_x[1] == alpha2_y[1]; |
b2e1b302 LR |
358 | } |
359 | ||
69b1572b | 360 | static bool regdom_changes(const char *alpha2) |
b2e1b302 | 361 | { |
458f4f9e | 362 | const struct ieee80211_regdomain *r = get_cfg80211_regdom(); |
761cf7ec | 363 | |
458f4f9e | 364 | if (!r) |
b2e1b302 | 365 | return true; |
458f4f9e | 366 | return !alpha2_equal(r->alpha2, alpha2); |
b2e1b302 LR |
367 | } |
368 | ||
09d989d1 LR |
369 | /* |
370 | * The NL80211_REGDOM_SET_BY_USER regdom alpha2 is cached, this lets | |
371 | * you know if a valid regulatory hint with NL80211_REGDOM_SET_BY_USER | |
372 | * has ever been issued. | |
373 | */ | |
374 | static bool is_user_regdom_saved(void) | |
375 | { | |
376 | if (user_alpha2[0] == '9' && user_alpha2[1] == '7') | |
377 | return false; | |
378 | ||
379 | /* This would indicate a mistake on the design */ | |
1a919318 | 380 | if (WARN(!is_world_regdom(user_alpha2) && !is_an_alpha2(user_alpha2), |
09d989d1 | 381 | "Unexpected user alpha2: %c%c\n", |
1a919318 | 382 | user_alpha2[0], user_alpha2[1])) |
09d989d1 LR |
383 | return false; |
384 | ||
385 | return true; | |
386 | } | |
387 | ||
e9763c3c JB |
388 | static const struct ieee80211_regdomain * |
389 | reg_copy_regd(const struct ieee80211_regdomain *src_regd) | |
3b377ea9 JL |
390 | { |
391 | struct ieee80211_regdomain *regd; | |
e9763c3c | 392 | int size_of_regd; |
3b377ea9 JL |
393 | unsigned int i; |
394 | ||
82f20856 JB |
395 | size_of_regd = |
396 | sizeof(struct ieee80211_regdomain) + | |
397 | src_regd->n_reg_rules * sizeof(struct ieee80211_reg_rule); | |
3b377ea9 JL |
398 | |
399 | regd = kzalloc(size_of_regd, GFP_KERNEL); | |
400 | if (!regd) | |
e9763c3c | 401 | return ERR_PTR(-ENOMEM); |
3b377ea9 JL |
402 | |
403 | memcpy(regd, src_regd, sizeof(struct ieee80211_regdomain)); | |
404 | ||
405 | for (i = 0; i < src_regd->n_reg_rules; i++) | |
406 | memcpy(®d->reg_rules[i], &src_regd->reg_rules[i], | |
e9763c3c | 407 | sizeof(struct ieee80211_reg_rule)); |
3b377ea9 | 408 | |
e9763c3c | 409 | return regd; |
3b377ea9 JL |
410 | } |
411 | ||
412 | #ifdef CONFIG_CFG80211_INTERNAL_REGDB | |
413 | struct reg_regdb_search_request { | |
414 | char alpha2[2]; | |
415 | struct list_head list; | |
416 | }; | |
417 | ||
418 | static LIST_HEAD(reg_regdb_search_list); | |
368d06f5 | 419 | static DEFINE_MUTEX(reg_regdb_search_mutex); |
3b377ea9 JL |
420 | |
421 | static void reg_regdb_search(struct work_struct *work) | |
422 | { | |
423 | struct reg_regdb_search_request *request; | |
e9763c3c JB |
424 | const struct ieee80211_regdomain *curdom, *regdom = NULL; |
425 | int i; | |
a85d0d7f | 426 | |
5fe231e8 | 427 | rtnl_lock(); |
3b377ea9 | 428 | |
368d06f5 | 429 | mutex_lock(®_regdb_search_mutex); |
3b377ea9 JL |
430 | while (!list_empty(®_regdb_search_list)) { |
431 | request = list_first_entry(®_regdb_search_list, | |
432 | struct reg_regdb_search_request, | |
433 | list); | |
434 | list_del(&request->list); | |
435 | ||
1a919318 | 436 | for (i = 0; i < reg_regdb_size; i++) { |
3b377ea9 JL |
437 | curdom = reg_regdb[i]; |
438 | ||
1a919318 | 439 | if (alpha2_equal(request->alpha2, curdom->alpha2)) { |
e9763c3c | 440 | regdom = reg_copy_regd(curdom); |
3b377ea9 JL |
441 | break; |
442 | } | |
443 | } | |
444 | ||
445 | kfree(request); | |
446 | } | |
368d06f5 | 447 | mutex_unlock(®_regdb_search_mutex); |
a85d0d7f | 448 | |
e9763c3c | 449 | if (!IS_ERR_OR_NULL(regdom)) |
a85d0d7f LR |
450 | set_regdom(regdom); |
451 | ||
5fe231e8 | 452 | rtnl_unlock(); |
3b377ea9 JL |
453 | } |
454 | ||
455 | static DECLARE_WORK(reg_regdb_work, reg_regdb_search); | |
456 | ||
457 | static void reg_regdb_query(const char *alpha2) | |
458 | { | |
459 | struct reg_regdb_search_request *request; | |
460 | ||
461 | if (!alpha2) | |
462 | return; | |
463 | ||
464 | request = kzalloc(sizeof(struct reg_regdb_search_request), GFP_KERNEL); | |
465 | if (!request) | |
466 | return; | |
467 | ||
468 | memcpy(request->alpha2, alpha2, 2); | |
469 | ||
368d06f5 | 470 | mutex_lock(®_regdb_search_mutex); |
3b377ea9 | 471 | list_add_tail(&request->list, ®_regdb_search_list); |
368d06f5 | 472 | mutex_unlock(®_regdb_search_mutex); |
3b377ea9 JL |
473 | |
474 | schedule_work(®_regdb_work); | |
475 | } | |
80007efe LR |
476 | |
477 | /* Feel free to add any other sanity checks here */ | |
478 | static void reg_regdb_size_check(void) | |
479 | { | |
480 | /* We should ideally BUILD_BUG_ON() but then random builds would fail */ | |
481 | WARN_ONCE(!reg_regdb_size, "db.txt is empty, you should update it..."); | |
482 | } | |
3b377ea9 | 483 | #else |
80007efe | 484 | static inline void reg_regdb_size_check(void) {} |
3b377ea9 JL |
485 | static inline void reg_regdb_query(const char *alpha2) {} |
486 | #endif /* CONFIG_CFG80211_INTERNAL_REGDB */ | |
487 | ||
fb1fc7ad LR |
488 | /* |
489 | * This lets us keep regulatory code which is updated on a regulatory | |
4d9d88d1 SJR |
490 | * basis in userspace. Country information is filled in by |
491 | * reg_device_uevent | |
fb1fc7ad | 492 | */ |
b2e1b302 LR |
493 | static int call_crda(const char *alpha2) |
494 | { | |
b2e1b302 | 495 | if (!is_world_regdom((char *) alpha2)) |
e9c0268f | 496 | pr_info("Calling CRDA for country: %c%c\n", |
b2e1b302 LR |
497 | alpha2[0], alpha2[1]); |
498 | else | |
e9c0268f | 499 | pr_info("Calling CRDA to update world regulatory domain\n"); |
b2e1b302 | 500 | |
3b377ea9 JL |
501 | /* query internal regulatory database (if it exists) */ |
502 | reg_regdb_query(alpha2); | |
503 | ||
4d9d88d1 | 504 | return kobject_uevent(®_pdev->dev.kobj, KOBJ_CHANGE); |
b2e1b302 LR |
505 | } |
506 | ||
fe6631ff LR |
507 | static enum reg_request_treatment |
508 | reg_call_crda(struct regulatory_request *request) | |
509 | { | |
510 | if (call_crda(request->alpha2)) | |
511 | return REG_REQ_IGNORE; | |
512 | return REG_REQ_OK; | |
513 | } | |
514 | ||
e438768f | 515 | bool reg_is_valid_request(const char *alpha2) |
b2e1b302 | 516 | { |
c492db37 | 517 | struct regulatory_request *lr = get_last_request(); |
61405e97 | 518 | |
c492db37 | 519 | if (!lr || lr->processed) |
f6037d09 JB |
520 | return false; |
521 | ||
c492db37 | 522 | return alpha2_equal(lr->alpha2, alpha2); |
b2e1b302 | 523 | } |
8318d78a | 524 | |
e3961af1 JD |
525 | static const struct ieee80211_regdomain *reg_get_regdomain(struct wiphy *wiphy) |
526 | { | |
527 | struct regulatory_request *lr = get_last_request(); | |
528 | ||
529 | /* | |
530 | * Follow the driver's regulatory domain, if present, unless a country | |
531 | * IE has been processed or a user wants to help complaince further | |
532 | */ | |
533 | if (lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && | |
534 | lr->initiator != NL80211_REGDOM_SET_BY_USER && | |
535 | wiphy->regd) | |
536 | return get_wiphy_regdom(wiphy); | |
537 | ||
538 | return get_cfg80211_regdom(); | |
539 | } | |
540 | ||
b2e1b302 | 541 | /* Sanity check on a regulatory rule */ |
a3d2eaf0 | 542 | static bool is_valid_reg_rule(const struct ieee80211_reg_rule *rule) |
8318d78a | 543 | { |
a3d2eaf0 | 544 | const struct ieee80211_freq_range *freq_range = &rule->freq_range; |
b2e1b302 LR |
545 | u32 freq_diff; |
546 | ||
91e99004 | 547 | if (freq_range->start_freq_khz <= 0 || freq_range->end_freq_khz <= 0) |
b2e1b302 LR |
548 | return false; |
549 | ||
550 | if (freq_range->start_freq_khz > freq_range->end_freq_khz) | |
551 | return false; | |
552 | ||
553 | freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz; | |
554 | ||
bd05f28e | 555 | if (freq_range->end_freq_khz <= freq_range->start_freq_khz || |
1a919318 | 556 | freq_range->max_bandwidth_khz > freq_diff) |
b2e1b302 LR |
557 | return false; |
558 | ||
559 | return true; | |
560 | } | |
561 | ||
a3d2eaf0 | 562 | static bool is_valid_rd(const struct ieee80211_regdomain *rd) |
b2e1b302 | 563 | { |
a3d2eaf0 | 564 | const struct ieee80211_reg_rule *reg_rule = NULL; |
b2e1b302 | 565 | unsigned int i; |
8318d78a | 566 | |
b2e1b302 LR |
567 | if (!rd->n_reg_rules) |
568 | return false; | |
8318d78a | 569 | |
88dc1c3f LR |
570 | if (WARN_ON(rd->n_reg_rules > NL80211_MAX_SUPP_REG_RULES)) |
571 | return false; | |
572 | ||
b2e1b302 LR |
573 | for (i = 0; i < rd->n_reg_rules; i++) { |
574 | reg_rule = &rd->reg_rules[i]; | |
575 | if (!is_valid_reg_rule(reg_rule)) | |
576 | return false; | |
577 | } | |
578 | ||
579 | return true; | |
8318d78a JB |
580 | } |
581 | ||
038659e7 | 582 | static bool reg_does_bw_fit(const struct ieee80211_freq_range *freq_range, |
fe7ef5e9 | 583 | u32 center_freq_khz, u32 bw_khz) |
b2e1b302 | 584 | { |
038659e7 LR |
585 | u32 start_freq_khz, end_freq_khz; |
586 | ||
587 | start_freq_khz = center_freq_khz - (bw_khz/2); | |
588 | end_freq_khz = center_freq_khz + (bw_khz/2); | |
589 | ||
590 | if (start_freq_khz >= freq_range->start_freq_khz && | |
591 | end_freq_khz <= freq_range->end_freq_khz) | |
592 | return true; | |
593 | ||
594 | return false; | |
b2e1b302 | 595 | } |
8318d78a | 596 | |
0c7dc45d LR |
597 | /** |
598 | * freq_in_rule_band - tells us if a frequency is in a frequency band | |
599 | * @freq_range: frequency rule we want to query | |
600 | * @freq_khz: frequency we are inquiring about | |
601 | * | |
602 | * This lets us know if a specific frequency rule is or is not relevant to | |
603 | * a specific frequency's band. Bands are device specific and artificial | |
64629b9d VK |
604 | * definitions (the "2.4 GHz band", the "5 GHz band" and the "60GHz band"), |
605 | * however it is safe for now to assume that a frequency rule should not be | |
606 | * part of a frequency's band if the start freq or end freq are off by more | |
607 | * than 2 GHz for the 2.4 and 5 GHz bands, and by more than 10 GHz for the | |
608 | * 60 GHz band. | |
0c7dc45d LR |
609 | * This resolution can be lowered and should be considered as we add |
610 | * regulatory rule support for other "bands". | |
611 | **/ | |
612 | static bool freq_in_rule_band(const struct ieee80211_freq_range *freq_range, | |
1a919318 | 613 | u32 freq_khz) |
0c7dc45d LR |
614 | { |
615 | #define ONE_GHZ_IN_KHZ 1000000 | |
64629b9d VK |
616 | /* |
617 | * From 802.11ad: directional multi-gigabit (DMG): | |
618 | * Pertaining to operation in a frequency band containing a channel | |
619 | * with the Channel starting frequency above 45 GHz. | |
620 | */ | |
621 | u32 limit = freq_khz > 45 * ONE_GHZ_IN_KHZ ? | |
622 | 10 * ONE_GHZ_IN_KHZ : 2 * ONE_GHZ_IN_KHZ; | |
623 | if (abs(freq_khz - freq_range->start_freq_khz) <= limit) | |
0c7dc45d | 624 | return true; |
64629b9d | 625 | if (abs(freq_khz - freq_range->end_freq_khz) <= limit) |
0c7dc45d LR |
626 | return true; |
627 | return false; | |
628 | #undef ONE_GHZ_IN_KHZ | |
629 | } | |
630 | ||
adbfb058 LR |
631 | /* |
632 | * Later on we can perhaps use the more restrictive DFS | |
633 | * region but we don't have information for that yet so | |
634 | * for now simply disallow conflicts. | |
635 | */ | |
636 | static enum nl80211_dfs_regions | |
637 | reg_intersect_dfs_region(const enum nl80211_dfs_regions dfs_region1, | |
638 | const enum nl80211_dfs_regions dfs_region2) | |
639 | { | |
640 | if (dfs_region1 != dfs_region2) | |
641 | return NL80211_DFS_UNSET; | |
642 | return dfs_region1; | |
643 | } | |
644 | ||
fb1fc7ad LR |
645 | /* |
646 | * Helper for regdom_intersect(), this does the real | |
647 | * mathematical intersection fun | |
648 | */ | |
1a919318 JB |
649 | static int reg_rules_intersect(const struct ieee80211_reg_rule *rule1, |
650 | const struct ieee80211_reg_rule *rule2, | |
651 | struct ieee80211_reg_rule *intersected_rule) | |
9c96477d LR |
652 | { |
653 | const struct ieee80211_freq_range *freq_range1, *freq_range2; | |
654 | struct ieee80211_freq_range *freq_range; | |
655 | const struct ieee80211_power_rule *power_rule1, *power_rule2; | |
656 | struct ieee80211_power_rule *power_rule; | |
657 | u32 freq_diff; | |
658 | ||
659 | freq_range1 = &rule1->freq_range; | |
660 | freq_range2 = &rule2->freq_range; | |
661 | freq_range = &intersected_rule->freq_range; | |
662 | ||
663 | power_rule1 = &rule1->power_rule; | |
664 | power_rule2 = &rule2->power_rule; | |
665 | power_rule = &intersected_rule->power_rule; | |
666 | ||
667 | freq_range->start_freq_khz = max(freq_range1->start_freq_khz, | |
1a919318 | 668 | freq_range2->start_freq_khz); |
9c96477d | 669 | freq_range->end_freq_khz = min(freq_range1->end_freq_khz, |
1a919318 | 670 | freq_range2->end_freq_khz); |
9c96477d | 671 | freq_range->max_bandwidth_khz = min(freq_range1->max_bandwidth_khz, |
1a919318 | 672 | freq_range2->max_bandwidth_khz); |
9c96477d LR |
673 | |
674 | freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz; | |
675 | if (freq_range->max_bandwidth_khz > freq_diff) | |
676 | freq_range->max_bandwidth_khz = freq_diff; | |
677 | ||
678 | power_rule->max_eirp = min(power_rule1->max_eirp, | |
679 | power_rule2->max_eirp); | |
680 | power_rule->max_antenna_gain = min(power_rule1->max_antenna_gain, | |
681 | power_rule2->max_antenna_gain); | |
682 | ||
1a919318 | 683 | intersected_rule->flags = rule1->flags | rule2->flags; |
9c96477d LR |
684 | |
685 | if (!is_valid_reg_rule(intersected_rule)) | |
686 | return -EINVAL; | |
687 | ||
688 | return 0; | |
689 | } | |
690 | ||
691 | /** | |
692 | * regdom_intersect - do the intersection between two regulatory domains | |
693 | * @rd1: first regulatory domain | |
694 | * @rd2: second regulatory domain | |
695 | * | |
696 | * Use this function to get the intersection between two regulatory domains. | |
697 | * Once completed we will mark the alpha2 for the rd as intersected, "98", | |
698 | * as no one single alpha2 can represent this regulatory domain. | |
699 | * | |
700 | * Returns a pointer to the regulatory domain structure which will hold the | |
701 | * resulting intersection of rules between rd1 and rd2. We will | |
702 | * kzalloc() this structure for you. | |
703 | */ | |
1a919318 JB |
704 | static struct ieee80211_regdomain * |
705 | regdom_intersect(const struct ieee80211_regdomain *rd1, | |
706 | const struct ieee80211_regdomain *rd2) | |
9c96477d LR |
707 | { |
708 | int r, size_of_regd; | |
709 | unsigned int x, y; | |
710 | unsigned int num_rules = 0, rule_idx = 0; | |
711 | const struct ieee80211_reg_rule *rule1, *rule2; | |
712 | struct ieee80211_reg_rule *intersected_rule; | |
713 | struct ieee80211_regdomain *rd; | |
714 | /* This is just a dummy holder to help us count */ | |
74f53cd8 | 715 | struct ieee80211_reg_rule dummy_rule; |
9c96477d LR |
716 | |
717 | if (!rd1 || !rd2) | |
718 | return NULL; | |
719 | ||
fb1fc7ad LR |
720 | /* |
721 | * First we get a count of the rules we'll need, then we actually | |
9c96477d LR |
722 | * build them. This is to so we can malloc() and free() a |
723 | * regdomain once. The reason we use reg_rules_intersect() here | |
724 | * is it will return -EINVAL if the rule computed makes no sense. | |
fb1fc7ad LR |
725 | * All rules that do check out OK are valid. |
726 | */ | |
9c96477d LR |
727 | |
728 | for (x = 0; x < rd1->n_reg_rules; x++) { | |
729 | rule1 = &rd1->reg_rules[x]; | |
730 | for (y = 0; y < rd2->n_reg_rules; y++) { | |
731 | rule2 = &rd2->reg_rules[y]; | |
74f53cd8 | 732 | if (!reg_rules_intersect(rule1, rule2, &dummy_rule)) |
9c96477d | 733 | num_rules++; |
9c96477d LR |
734 | } |
735 | } | |
736 | ||
737 | if (!num_rules) | |
738 | return NULL; | |
739 | ||
740 | size_of_regd = sizeof(struct ieee80211_regdomain) + | |
82f20856 | 741 | num_rules * sizeof(struct ieee80211_reg_rule); |
9c96477d LR |
742 | |
743 | rd = kzalloc(size_of_regd, GFP_KERNEL); | |
744 | if (!rd) | |
745 | return NULL; | |
746 | ||
8a57fff0 | 747 | for (x = 0; x < rd1->n_reg_rules && rule_idx < num_rules; x++) { |
9c96477d | 748 | rule1 = &rd1->reg_rules[x]; |
8a57fff0 | 749 | for (y = 0; y < rd2->n_reg_rules && rule_idx < num_rules; y++) { |
9c96477d | 750 | rule2 = &rd2->reg_rules[y]; |
fb1fc7ad LR |
751 | /* |
752 | * This time around instead of using the stack lets | |
9c96477d | 753 | * write to the target rule directly saving ourselves |
fb1fc7ad LR |
754 | * a memcpy() |
755 | */ | |
9c96477d | 756 | intersected_rule = &rd->reg_rules[rule_idx]; |
1a919318 | 757 | r = reg_rules_intersect(rule1, rule2, intersected_rule); |
fb1fc7ad LR |
758 | /* |
759 | * No need to memset here the intersected rule here as | |
760 | * we're not using the stack anymore | |
761 | */ | |
9c96477d LR |
762 | if (r) |
763 | continue; | |
764 | rule_idx++; | |
765 | } | |
766 | } | |
767 | ||
768 | if (rule_idx != num_rules) { | |
769 | kfree(rd); | |
770 | return NULL; | |
771 | } | |
772 | ||
773 | rd->n_reg_rules = num_rules; | |
774 | rd->alpha2[0] = '9'; | |
775 | rd->alpha2[1] = '8'; | |
adbfb058 LR |
776 | rd->dfs_region = reg_intersect_dfs_region(rd1->dfs_region, |
777 | rd2->dfs_region); | |
9c96477d LR |
778 | |
779 | return rd; | |
780 | } | |
781 | ||
fb1fc7ad LR |
782 | /* |
783 | * XXX: add support for the rest of enum nl80211_reg_rule_flags, we may | |
784 | * want to just have the channel structure use these | |
785 | */ | |
b2e1b302 LR |
786 | static u32 map_regdom_flags(u32 rd_flags) |
787 | { | |
788 | u32 channel_flags = 0; | |
8fe02e16 LR |
789 | if (rd_flags & NL80211_RRF_NO_IR_ALL) |
790 | channel_flags |= IEEE80211_CHAN_NO_IR; | |
b2e1b302 LR |
791 | if (rd_flags & NL80211_RRF_DFS) |
792 | channel_flags |= IEEE80211_CHAN_RADAR; | |
03f6b084 SF |
793 | if (rd_flags & NL80211_RRF_NO_OFDM) |
794 | channel_flags |= IEEE80211_CHAN_NO_OFDM; | |
b2e1b302 LR |
795 | return channel_flags; |
796 | } | |
797 | ||
361c9c8b JB |
798 | static const struct ieee80211_reg_rule * |
799 | freq_reg_info_regd(struct wiphy *wiphy, u32 center_freq, | |
800 | const struct ieee80211_regdomain *regd) | |
8318d78a JB |
801 | { |
802 | int i; | |
0c7dc45d | 803 | bool band_rule_found = false; |
038659e7 LR |
804 | bool bw_fits = false; |
805 | ||
3e0c3ff3 | 806 | if (!regd) |
361c9c8b | 807 | return ERR_PTR(-EINVAL); |
b2e1b302 | 808 | |
3e0c3ff3 | 809 | for (i = 0; i < regd->n_reg_rules; i++) { |
b2e1b302 LR |
810 | const struct ieee80211_reg_rule *rr; |
811 | const struct ieee80211_freq_range *fr = NULL; | |
b2e1b302 | 812 | |
3e0c3ff3 | 813 | rr = ®d->reg_rules[i]; |
b2e1b302 | 814 | fr = &rr->freq_range; |
0c7dc45d | 815 | |
fb1fc7ad LR |
816 | /* |
817 | * We only need to know if one frequency rule was | |
0c7dc45d | 818 | * was in center_freq's band, that's enough, so lets |
fb1fc7ad LR |
819 | * not overwrite it once found |
820 | */ | |
0c7dc45d LR |
821 | if (!band_rule_found) |
822 | band_rule_found = freq_in_rule_band(fr, center_freq); | |
823 | ||
fe7ef5e9 | 824 | bw_fits = reg_does_bw_fit(fr, center_freq, MHZ_TO_KHZ(20)); |
0c7dc45d | 825 | |
361c9c8b JB |
826 | if (band_rule_found && bw_fits) |
827 | return rr; | |
8318d78a JB |
828 | } |
829 | ||
0c7dc45d | 830 | if (!band_rule_found) |
361c9c8b | 831 | return ERR_PTR(-ERANGE); |
0c7dc45d | 832 | |
361c9c8b | 833 | return ERR_PTR(-EINVAL); |
b2e1b302 LR |
834 | } |
835 | ||
361c9c8b JB |
836 | const struct ieee80211_reg_rule *freq_reg_info(struct wiphy *wiphy, |
837 | u32 center_freq) | |
1fa25e41 | 838 | { |
5d885b99 | 839 | const struct ieee80211_regdomain *regd; |
1a919318 | 840 | |
e3961af1 | 841 | regd = reg_get_regdomain(wiphy); |
5d885b99 | 842 | |
361c9c8b | 843 | return freq_reg_info_regd(wiphy, center_freq, regd); |
1fa25e41 | 844 | } |
4f366c5d | 845 | EXPORT_SYMBOL(freq_reg_info); |
b2e1b302 | 846 | |
034c6d6e | 847 | const char *reg_initiator_name(enum nl80211_reg_initiator initiator) |
926a0a09 LR |
848 | { |
849 | switch (initiator) { | |
850 | case NL80211_REGDOM_SET_BY_CORE: | |
034c6d6e | 851 | return "core"; |
926a0a09 | 852 | case NL80211_REGDOM_SET_BY_USER: |
034c6d6e | 853 | return "user"; |
926a0a09 | 854 | case NL80211_REGDOM_SET_BY_DRIVER: |
034c6d6e | 855 | return "driver"; |
926a0a09 | 856 | case NL80211_REGDOM_SET_BY_COUNTRY_IE: |
034c6d6e | 857 | return "country IE"; |
926a0a09 LR |
858 | default: |
859 | WARN_ON(1); | |
034c6d6e | 860 | return "bug"; |
926a0a09 LR |
861 | } |
862 | } | |
034c6d6e | 863 | EXPORT_SYMBOL(reg_initiator_name); |
e702d3cf | 864 | |
034c6d6e | 865 | #ifdef CONFIG_CFG80211_REG_DEBUG |
e702d3cf | 866 | static void chan_reg_rule_print_dbg(struct ieee80211_channel *chan, |
e702d3cf LR |
867 | const struct ieee80211_reg_rule *reg_rule) |
868 | { | |
869 | const struct ieee80211_power_rule *power_rule; | |
870 | const struct ieee80211_freq_range *freq_range; | |
871 | char max_antenna_gain[32]; | |
872 | ||
873 | power_rule = ®_rule->power_rule; | |
874 | freq_range = ®_rule->freq_range; | |
875 | ||
876 | if (!power_rule->max_antenna_gain) | |
877 | snprintf(max_antenna_gain, 32, "N/A"); | |
878 | else | |
879 | snprintf(max_antenna_gain, 32, "%d", power_rule->max_antenna_gain); | |
880 | ||
fe7ef5e9 JB |
881 | REG_DBG_PRINT("Updating information on frequency %d MHz with regulatory rule:\n", |
882 | chan->center_freq); | |
e702d3cf | 883 | |
56e6786e | 884 | REG_DBG_PRINT("%d KHz - %d KHz @ %d KHz), (%s mBi, %d mBm)\n", |
1a919318 JB |
885 | freq_range->start_freq_khz, freq_range->end_freq_khz, |
886 | freq_range->max_bandwidth_khz, max_antenna_gain, | |
e702d3cf LR |
887 | power_rule->max_eirp); |
888 | } | |
889 | #else | |
890 | static void chan_reg_rule_print_dbg(struct ieee80211_channel *chan, | |
e702d3cf LR |
891 | const struct ieee80211_reg_rule *reg_rule) |
892 | { | |
893 | return; | |
894 | } | |
926a0a09 LR |
895 | #endif |
896 | ||
038659e7 LR |
897 | /* |
898 | * Note that right now we assume the desired channel bandwidth | |
899 | * is always 20 MHz for each individual channel (HT40 uses 20 MHz | |
fe7ef5e9 | 900 | * per channel, the primary and the extension channel). |
038659e7 | 901 | */ |
7ca43d03 LR |
902 | static void handle_channel(struct wiphy *wiphy, |
903 | enum nl80211_reg_initiator initiator, | |
fdc9d7b2 | 904 | struct ieee80211_channel *chan) |
b2e1b302 | 905 | { |
038659e7 | 906 | u32 flags, bw_flags = 0; |
b2e1b302 LR |
907 | const struct ieee80211_reg_rule *reg_rule = NULL; |
908 | const struct ieee80211_power_rule *power_rule = NULL; | |
038659e7 | 909 | const struct ieee80211_freq_range *freq_range = NULL; |
fe33eb39 | 910 | struct wiphy *request_wiphy = NULL; |
c492db37 | 911 | struct regulatory_request *lr = get_last_request(); |
a92a3ce7 | 912 | |
c492db37 | 913 | request_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx); |
a92a3ce7 LR |
914 | |
915 | flags = chan->orig_flags; | |
b2e1b302 | 916 | |
361c9c8b JB |
917 | reg_rule = freq_reg_info(wiphy, MHZ_TO_KHZ(chan->center_freq)); |
918 | if (IS_ERR(reg_rule)) { | |
ca4ffe8f LR |
919 | /* |
920 | * We will disable all channels that do not match our | |
25985edc | 921 | * received regulatory rule unless the hint is coming |
ca4ffe8f LR |
922 | * from a Country IE and the Country IE had no information |
923 | * about a band. The IEEE 802.11 spec allows for an AP | |
924 | * to send only a subset of the regulatory rules allowed, | |
925 | * so an AP in the US that only supports 2.4 GHz may only send | |
926 | * a country IE with information for the 2.4 GHz band | |
927 | * while 5 GHz is still supported. | |
928 | */ | |
929 | if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE && | |
361c9c8b | 930 | PTR_ERR(reg_rule) == -ERANGE) |
ca4ffe8f LR |
931 | return; |
932 | ||
cc493e4f LR |
933 | if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER && |
934 | request_wiphy && request_wiphy == wiphy && | |
a2f73b6c | 935 | request_wiphy->regulatory_flags & REGULATORY_STRICT_REG) { |
cc493e4f LR |
936 | REG_DBG_PRINT("Disabling freq %d MHz for good\n", |
937 | chan->center_freq); | |
938 | chan->orig_flags |= IEEE80211_CHAN_DISABLED; | |
939 | chan->flags = chan->orig_flags; | |
940 | } else { | |
941 | REG_DBG_PRINT("Disabling freq %d MHz\n", | |
942 | chan->center_freq); | |
943 | chan->flags |= IEEE80211_CHAN_DISABLED; | |
944 | } | |
8318d78a | 945 | return; |
ca4ffe8f | 946 | } |
8318d78a | 947 | |
fe7ef5e9 | 948 | chan_reg_rule_print_dbg(chan, reg_rule); |
e702d3cf | 949 | |
b2e1b302 | 950 | power_rule = ®_rule->power_rule; |
038659e7 LR |
951 | freq_range = ®_rule->freq_range; |
952 | ||
953 | if (freq_range->max_bandwidth_khz < MHZ_TO_KHZ(40)) | |
954 | bw_flags = IEEE80211_CHAN_NO_HT40; | |
c7a6ee27 JB |
955 | if (freq_range->max_bandwidth_khz < MHZ_TO_KHZ(80)) |
956 | bw_flags |= IEEE80211_CHAN_NO_80MHZ; | |
957 | if (freq_range->max_bandwidth_khz < MHZ_TO_KHZ(160)) | |
958 | bw_flags |= IEEE80211_CHAN_NO_160MHZ; | |
b2e1b302 | 959 | |
c492db37 | 960 | if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER && |
806a9e39 | 961 | request_wiphy && request_wiphy == wiphy && |
a2f73b6c | 962 | request_wiphy->regulatory_flags & REGULATORY_STRICT_REG) { |
fb1fc7ad | 963 | /* |
25985edc | 964 | * This guarantees the driver's requested regulatory domain |
f976376d | 965 | * will always be used as a base for further regulatory |
fb1fc7ad LR |
966 | * settings |
967 | */ | |
f976376d | 968 | chan->flags = chan->orig_flags = |
038659e7 | 969 | map_regdom_flags(reg_rule->flags) | bw_flags; |
f976376d LR |
970 | chan->max_antenna_gain = chan->orig_mag = |
971 | (int) MBI_TO_DBI(power_rule->max_antenna_gain); | |
279f0f55 | 972 | chan->max_reg_power = chan->max_power = chan->orig_mpwr = |
f976376d LR |
973 | (int) MBM_TO_DBM(power_rule->max_eirp); |
974 | return; | |
975 | } | |
976 | ||
04f39047 SW |
977 | chan->dfs_state = NL80211_DFS_USABLE; |
978 | chan->dfs_state_entered = jiffies; | |
979 | ||
aa3d7eef | 980 | chan->beacon_found = false; |
038659e7 | 981 | chan->flags = flags | bw_flags | map_regdom_flags(reg_rule->flags); |
1a919318 JB |
982 | chan->max_antenna_gain = |
983 | min_t(int, chan->orig_mag, | |
984 | MBI_TO_DBI(power_rule->max_antenna_gain)); | |
eccc068e | 985 | chan->max_reg_power = (int) MBM_TO_DBM(power_rule->max_eirp); |
5e31fc08 SG |
986 | if (chan->orig_mpwr) { |
987 | /* | |
a09a85a0 LR |
988 | * Devices that use REGULATORY_COUNTRY_IE_FOLLOW_POWER |
989 | * will always follow the passed country IE power settings. | |
5e31fc08 SG |
990 | */ |
991 | if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE && | |
a09a85a0 | 992 | wiphy->regulatory_flags & REGULATORY_COUNTRY_IE_FOLLOW_POWER) |
5e31fc08 SG |
993 | chan->max_power = chan->max_reg_power; |
994 | else | |
995 | chan->max_power = min(chan->orig_mpwr, | |
996 | chan->max_reg_power); | |
997 | } else | |
998 | chan->max_power = chan->max_reg_power; | |
8318d78a JB |
999 | } |
1000 | ||
7ca43d03 | 1001 | static void handle_band(struct wiphy *wiphy, |
fdc9d7b2 JB |
1002 | enum nl80211_reg_initiator initiator, |
1003 | struct ieee80211_supported_band *sband) | |
8318d78a | 1004 | { |
a92a3ce7 | 1005 | unsigned int i; |
a92a3ce7 | 1006 | |
fdc9d7b2 JB |
1007 | if (!sband) |
1008 | return; | |
8318d78a JB |
1009 | |
1010 | for (i = 0; i < sband->n_channels; i++) | |
fdc9d7b2 | 1011 | handle_channel(wiphy, initiator, &sband->channels[i]); |
8318d78a JB |
1012 | } |
1013 | ||
57b5ce07 LR |
1014 | static bool reg_request_cell_base(struct regulatory_request *request) |
1015 | { | |
1016 | if (request->initiator != NL80211_REGDOM_SET_BY_USER) | |
1017 | return false; | |
1a919318 | 1018 | return request->user_reg_hint_type == NL80211_USER_REG_HINT_CELL_BASE; |
57b5ce07 LR |
1019 | } |
1020 | ||
1021 | bool reg_last_request_cell_base(void) | |
1022 | { | |
38fd2143 | 1023 | return reg_request_cell_base(get_last_request()); |
57b5ce07 LR |
1024 | } |
1025 | ||
1026 | #ifdef CONFIG_CFG80211_CERTIFICATION_ONUS | |
57b5ce07 | 1027 | /* Core specific check */ |
2f92212b JB |
1028 | static enum reg_request_treatment |
1029 | reg_ignore_cell_hint(struct regulatory_request *pending_request) | |
57b5ce07 | 1030 | { |
c492db37 JB |
1031 | struct regulatory_request *lr = get_last_request(); |
1032 | ||
57b5ce07 | 1033 | if (!reg_num_devs_support_basehint) |
2f92212b | 1034 | return REG_REQ_IGNORE; |
57b5ce07 | 1035 | |
c492db37 | 1036 | if (reg_request_cell_base(lr) && |
1a919318 | 1037 | !regdom_changes(pending_request->alpha2)) |
2f92212b | 1038 | return REG_REQ_ALREADY_SET; |
1a919318 | 1039 | |
2f92212b | 1040 | return REG_REQ_OK; |
57b5ce07 LR |
1041 | } |
1042 | ||
1043 | /* Device specific check */ | |
1044 | static bool reg_dev_ignore_cell_hint(struct wiphy *wiphy) | |
1045 | { | |
1a919318 | 1046 | return !(wiphy->features & NL80211_FEATURE_CELL_BASE_REG_HINTS); |
57b5ce07 LR |
1047 | } |
1048 | #else | |
1049 | static int reg_ignore_cell_hint(struct regulatory_request *pending_request) | |
1050 | { | |
2f92212b | 1051 | return REG_REQ_IGNORE; |
57b5ce07 | 1052 | } |
1a919318 JB |
1053 | |
1054 | static bool reg_dev_ignore_cell_hint(struct wiphy *wiphy) | |
57b5ce07 LR |
1055 | { |
1056 | return true; | |
1057 | } | |
1058 | #endif | |
1059 | ||
fa1fb9cb LR |
1060 | static bool wiphy_strict_alpha2_regd(struct wiphy *wiphy) |
1061 | { | |
a2f73b6c LR |
1062 | if (wiphy->regulatory_flags & REGULATORY_STRICT_REG && |
1063 | !(wiphy->regulatory_flags & REGULATORY_CUSTOM_REG)) | |
fa1fb9cb LR |
1064 | return true; |
1065 | return false; | |
1066 | } | |
57b5ce07 | 1067 | |
7db90f4a LR |
1068 | static bool ignore_reg_update(struct wiphy *wiphy, |
1069 | enum nl80211_reg_initiator initiator) | |
14b9815a | 1070 | { |
c492db37 JB |
1071 | struct regulatory_request *lr = get_last_request(); |
1072 | ||
1073 | if (!lr) { | |
034c6d6e LR |
1074 | REG_DBG_PRINT("Ignoring regulatory request set by %s " |
1075 | "since last_request is not set\n", | |
926a0a09 | 1076 | reg_initiator_name(initiator)); |
14b9815a | 1077 | return true; |
926a0a09 LR |
1078 | } |
1079 | ||
7db90f4a | 1080 | if (initiator == NL80211_REGDOM_SET_BY_CORE && |
a2f73b6c | 1081 | wiphy->regulatory_flags & REGULATORY_CUSTOM_REG) { |
034c6d6e LR |
1082 | REG_DBG_PRINT("Ignoring regulatory request set by %s " |
1083 | "since the driver uses its own custom " | |
1084 | "regulatory domain\n", | |
926a0a09 | 1085 | reg_initiator_name(initiator)); |
14b9815a | 1086 | return true; |
926a0a09 LR |
1087 | } |
1088 | ||
fb1fc7ad LR |
1089 | /* |
1090 | * wiphy->regd will be set once the device has its own | |
1091 | * desired regulatory domain set | |
1092 | */ | |
fa1fb9cb | 1093 | if (wiphy_strict_alpha2_regd(wiphy) && !wiphy->regd && |
749b527b | 1094 | initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && |
c492db37 | 1095 | !is_world_regdom(lr->alpha2)) { |
034c6d6e LR |
1096 | REG_DBG_PRINT("Ignoring regulatory request set by %s " |
1097 | "since the driver requires its own regulatory " | |
1098 | "domain to be set first\n", | |
926a0a09 | 1099 | reg_initiator_name(initiator)); |
14b9815a | 1100 | return true; |
926a0a09 LR |
1101 | } |
1102 | ||
c492db37 | 1103 | if (reg_request_cell_base(lr)) |
57b5ce07 LR |
1104 | return reg_dev_ignore_cell_hint(wiphy); |
1105 | ||
14b9815a LR |
1106 | return false; |
1107 | } | |
1108 | ||
3195e489 LR |
1109 | static bool reg_is_world_roaming(struct wiphy *wiphy) |
1110 | { | |
1111 | const struct ieee80211_regdomain *cr = get_cfg80211_regdom(); | |
1112 | const struct ieee80211_regdomain *wr = get_wiphy_regdom(wiphy); | |
1113 | struct regulatory_request *lr = get_last_request(); | |
1114 | ||
1115 | if (is_world_regdom(cr->alpha2) || (wr && is_world_regdom(wr->alpha2))) | |
1116 | return true; | |
1117 | ||
1118 | if (lr && lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && | |
a2f73b6c | 1119 | wiphy->regulatory_flags & REGULATORY_CUSTOM_REG) |
3195e489 LR |
1120 | return true; |
1121 | ||
1122 | return false; | |
1123 | } | |
1124 | ||
1a919318 | 1125 | static void handle_reg_beacon(struct wiphy *wiphy, unsigned int chan_idx, |
e38f8a7a LR |
1126 | struct reg_beacon *reg_beacon) |
1127 | { | |
e38f8a7a LR |
1128 | struct ieee80211_supported_band *sband; |
1129 | struct ieee80211_channel *chan; | |
6bad8766 LR |
1130 | bool channel_changed = false; |
1131 | struct ieee80211_channel chan_before; | |
e38f8a7a | 1132 | |
e38f8a7a LR |
1133 | sband = wiphy->bands[reg_beacon->chan.band]; |
1134 | chan = &sband->channels[chan_idx]; | |
1135 | ||
1136 | if (likely(chan->center_freq != reg_beacon->chan.center_freq)) | |
1137 | return; | |
1138 | ||
6bad8766 LR |
1139 | if (chan->beacon_found) |
1140 | return; | |
1141 | ||
1142 | chan->beacon_found = true; | |
1143 | ||
0f500a5f LR |
1144 | if (!reg_is_world_roaming(wiphy)) |
1145 | return; | |
1146 | ||
a2f73b6c | 1147 | if (wiphy->regulatory_flags & REGULATORY_DISABLE_BEACON_HINTS) |
37184244 LR |
1148 | return; |
1149 | ||
6bad8766 LR |
1150 | chan_before.center_freq = chan->center_freq; |
1151 | chan_before.flags = chan->flags; | |
1152 | ||
8fe02e16 LR |
1153 | if (chan->flags & IEEE80211_CHAN_NO_IR) { |
1154 | chan->flags &= ~IEEE80211_CHAN_NO_IR; | |
6bad8766 | 1155 | channel_changed = true; |
e38f8a7a LR |
1156 | } |
1157 | ||
6bad8766 LR |
1158 | if (channel_changed) |
1159 | nl80211_send_beacon_hint_event(wiphy, &chan_before, chan); | |
e38f8a7a LR |
1160 | } |
1161 | ||
1162 | /* | |
1163 | * Called when a scan on a wiphy finds a beacon on | |
1164 | * new channel | |
1165 | */ | |
1166 | static void wiphy_update_new_beacon(struct wiphy *wiphy, | |
1167 | struct reg_beacon *reg_beacon) | |
1168 | { | |
1169 | unsigned int i; | |
1170 | struct ieee80211_supported_band *sband; | |
1171 | ||
e38f8a7a LR |
1172 | if (!wiphy->bands[reg_beacon->chan.band]) |
1173 | return; | |
1174 | ||
1175 | sband = wiphy->bands[reg_beacon->chan.band]; | |
1176 | ||
1177 | for (i = 0; i < sband->n_channels; i++) | |
1178 | handle_reg_beacon(wiphy, i, reg_beacon); | |
1179 | } | |
1180 | ||
1181 | /* | |
1182 | * Called upon reg changes or a new wiphy is added | |
1183 | */ | |
1184 | static void wiphy_update_beacon_reg(struct wiphy *wiphy) | |
1185 | { | |
1186 | unsigned int i; | |
1187 | struct ieee80211_supported_band *sband; | |
1188 | struct reg_beacon *reg_beacon; | |
1189 | ||
e38f8a7a LR |
1190 | list_for_each_entry(reg_beacon, ®_beacon_list, list) { |
1191 | if (!wiphy->bands[reg_beacon->chan.band]) | |
1192 | continue; | |
1193 | sband = wiphy->bands[reg_beacon->chan.band]; | |
1194 | for (i = 0; i < sband->n_channels; i++) | |
1195 | handle_reg_beacon(wiphy, i, reg_beacon); | |
1196 | } | |
1197 | } | |
1198 | ||
e38f8a7a LR |
1199 | /* Reap the advantages of previously found beacons */ |
1200 | static void reg_process_beacons(struct wiphy *wiphy) | |
1201 | { | |
b1ed8ddd LR |
1202 | /* |
1203 | * Means we are just firing up cfg80211, so no beacons would | |
1204 | * have been processed yet. | |
1205 | */ | |
1206 | if (!last_request) | |
1207 | return; | |
e38f8a7a LR |
1208 | wiphy_update_beacon_reg(wiphy); |
1209 | } | |
1210 | ||
1a919318 | 1211 | static bool is_ht40_allowed(struct ieee80211_channel *chan) |
038659e7 LR |
1212 | { |
1213 | if (!chan) | |
1a919318 | 1214 | return false; |
038659e7 | 1215 | if (chan->flags & IEEE80211_CHAN_DISABLED) |
1a919318 | 1216 | return false; |
038659e7 | 1217 | /* This would happen when regulatory rules disallow HT40 completely */ |
55b183ad FF |
1218 | if ((chan->flags & IEEE80211_CHAN_NO_HT40) == IEEE80211_CHAN_NO_HT40) |
1219 | return false; | |
1220 | return true; | |
038659e7 LR |
1221 | } |
1222 | ||
1223 | static void reg_process_ht_flags_channel(struct wiphy *wiphy, | |
fdc9d7b2 | 1224 | struct ieee80211_channel *channel) |
038659e7 | 1225 | { |
fdc9d7b2 | 1226 | struct ieee80211_supported_band *sband = wiphy->bands[channel->band]; |
038659e7 LR |
1227 | struct ieee80211_channel *channel_before = NULL, *channel_after = NULL; |
1228 | unsigned int i; | |
1229 | ||
1a919318 | 1230 | if (!is_ht40_allowed(channel)) { |
038659e7 LR |
1231 | channel->flags |= IEEE80211_CHAN_NO_HT40; |
1232 | return; | |
1233 | } | |
1234 | ||
1235 | /* | |
1236 | * We need to ensure the extension channels exist to | |
1237 | * be able to use HT40- or HT40+, this finds them (or not) | |
1238 | */ | |
1239 | for (i = 0; i < sband->n_channels; i++) { | |
1240 | struct ieee80211_channel *c = &sband->channels[i]; | |
1a919318 | 1241 | |
038659e7 LR |
1242 | if (c->center_freq == (channel->center_freq - 20)) |
1243 | channel_before = c; | |
1244 | if (c->center_freq == (channel->center_freq + 20)) | |
1245 | channel_after = c; | |
1246 | } | |
1247 | ||
1248 | /* | |
1249 | * Please note that this assumes target bandwidth is 20 MHz, | |
1250 | * if that ever changes we also need to change the below logic | |
1251 | * to include that as well. | |
1252 | */ | |
1a919318 | 1253 | if (!is_ht40_allowed(channel_before)) |
689da1b3 | 1254 | channel->flags |= IEEE80211_CHAN_NO_HT40MINUS; |
038659e7 | 1255 | else |
689da1b3 | 1256 | channel->flags &= ~IEEE80211_CHAN_NO_HT40MINUS; |
038659e7 | 1257 | |
1a919318 | 1258 | if (!is_ht40_allowed(channel_after)) |
689da1b3 | 1259 | channel->flags |= IEEE80211_CHAN_NO_HT40PLUS; |
038659e7 | 1260 | else |
689da1b3 | 1261 | channel->flags &= ~IEEE80211_CHAN_NO_HT40PLUS; |
038659e7 LR |
1262 | } |
1263 | ||
1264 | static void reg_process_ht_flags_band(struct wiphy *wiphy, | |
fdc9d7b2 | 1265 | struct ieee80211_supported_band *sband) |
038659e7 LR |
1266 | { |
1267 | unsigned int i; | |
038659e7 | 1268 | |
fdc9d7b2 JB |
1269 | if (!sband) |
1270 | return; | |
038659e7 LR |
1271 | |
1272 | for (i = 0; i < sband->n_channels; i++) | |
fdc9d7b2 | 1273 | reg_process_ht_flags_channel(wiphy, &sband->channels[i]); |
038659e7 LR |
1274 | } |
1275 | ||
1276 | static void reg_process_ht_flags(struct wiphy *wiphy) | |
1277 | { | |
1278 | enum ieee80211_band band; | |
1279 | ||
1280 | if (!wiphy) | |
1281 | return; | |
1282 | ||
fdc9d7b2 JB |
1283 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) |
1284 | reg_process_ht_flags_band(wiphy, wiphy->bands[band]); | |
038659e7 LR |
1285 | } |
1286 | ||
0e3802db LR |
1287 | static void reg_call_notifier(struct wiphy *wiphy, |
1288 | struct regulatory_request *request) | |
1289 | { | |
1290 | if (wiphy->reg_notifier) | |
1291 | wiphy->reg_notifier(wiphy, request); | |
1292 | } | |
1293 | ||
eac03e38 SN |
1294 | static void wiphy_update_regulatory(struct wiphy *wiphy, |
1295 | enum nl80211_reg_initiator initiator) | |
b2e1b302 LR |
1296 | { |
1297 | enum ieee80211_band band; | |
c492db37 | 1298 | struct regulatory_request *lr = get_last_request(); |
eac03e38 | 1299 | |
0e3802db LR |
1300 | if (ignore_reg_update(wiphy, initiator)) { |
1301 | /* | |
1302 | * Regulatory updates set by CORE are ignored for custom | |
1303 | * regulatory cards. Let us notify the changes to the driver, | |
1304 | * as some drivers used this to restore its orig_* reg domain. | |
1305 | */ | |
1306 | if (initiator == NL80211_REGDOM_SET_BY_CORE && | |
a2f73b6c | 1307 | wiphy->regulatory_flags & REGULATORY_CUSTOM_REG) |
0e3802db | 1308 | reg_call_notifier(wiphy, lr); |
a203c2aa | 1309 | return; |
0e3802db | 1310 | } |
a203c2aa | 1311 | |
c492db37 | 1312 | lr->dfs_region = get_cfg80211_regdom()->dfs_region; |
b68e6b3b | 1313 | |
fdc9d7b2 JB |
1314 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) |
1315 | handle_band(wiphy, initiator, wiphy->bands[band]); | |
a203c2aa | 1316 | |
e38f8a7a | 1317 | reg_process_beacons(wiphy); |
038659e7 | 1318 | reg_process_ht_flags(wiphy); |
0e3802db | 1319 | reg_call_notifier(wiphy, lr); |
b2e1b302 LR |
1320 | } |
1321 | ||
d7549cbb SN |
1322 | static void update_all_wiphy_regulatory(enum nl80211_reg_initiator initiator) |
1323 | { | |
1324 | struct cfg80211_registered_device *rdev; | |
4a38994f | 1325 | struct wiphy *wiphy; |
d7549cbb | 1326 | |
5fe231e8 | 1327 | ASSERT_RTNL(); |
458f4f9e | 1328 | |
4a38994f RM |
1329 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) { |
1330 | wiphy = &rdev->wiphy; | |
1331 | wiphy_update_regulatory(wiphy, initiator); | |
4a38994f | 1332 | } |
d7549cbb SN |
1333 | } |
1334 | ||
1fa25e41 | 1335 | static void handle_channel_custom(struct wiphy *wiphy, |
fdc9d7b2 | 1336 | struct ieee80211_channel *chan, |
1fa25e41 LR |
1337 | const struct ieee80211_regdomain *regd) |
1338 | { | |
038659e7 | 1339 | u32 bw_flags = 0; |
1fa25e41 LR |
1340 | const struct ieee80211_reg_rule *reg_rule = NULL; |
1341 | const struct ieee80211_power_rule *power_rule = NULL; | |
038659e7 | 1342 | const struct ieee80211_freq_range *freq_range = NULL; |
ac46d48e | 1343 | |
361c9c8b JB |
1344 | reg_rule = freq_reg_info_regd(wiphy, MHZ_TO_KHZ(chan->center_freq), |
1345 | regd); | |
1fa25e41 | 1346 | |
361c9c8b | 1347 | if (IS_ERR(reg_rule)) { |
fe7ef5e9 JB |
1348 | REG_DBG_PRINT("Disabling freq %d MHz as custom regd has no rule that fits it\n", |
1349 | chan->center_freq); | |
cc493e4f LR |
1350 | chan->orig_flags |= IEEE80211_CHAN_DISABLED; |
1351 | chan->flags = chan->orig_flags; | |
1fa25e41 LR |
1352 | return; |
1353 | } | |
1354 | ||
fe7ef5e9 | 1355 | chan_reg_rule_print_dbg(chan, reg_rule); |
e702d3cf | 1356 | |
1fa25e41 | 1357 | power_rule = ®_rule->power_rule; |
038659e7 LR |
1358 | freq_range = ®_rule->freq_range; |
1359 | ||
1360 | if (freq_range->max_bandwidth_khz < MHZ_TO_KHZ(40)) | |
1361 | bw_flags = IEEE80211_CHAN_NO_HT40; | |
c7a6ee27 JB |
1362 | if (freq_range->max_bandwidth_khz < MHZ_TO_KHZ(80)) |
1363 | bw_flags |= IEEE80211_CHAN_NO_80MHZ; | |
1364 | if (freq_range->max_bandwidth_khz < MHZ_TO_KHZ(160)) | |
1365 | bw_flags |= IEEE80211_CHAN_NO_160MHZ; | |
1fa25e41 | 1366 | |
038659e7 | 1367 | chan->flags |= map_regdom_flags(reg_rule->flags) | bw_flags; |
1fa25e41 | 1368 | chan->max_antenna_gain = (int) MBI_TO_DBI(power_rule->max_antenna_gain); |
279f0f55 FF |
1369 | chan->max_reg_power = chan->max_power = |
1370 | (int) MBM_TO_DBM(power_rule->max_eirp); | |
1fa25e41 LR |
1371 | } |
1372 | ||
fdc9d7b2 JB |
1373 | static void handle_band_custom(struct wiphy *wiphy, |
1374 | struct ieee80211_supported_band *sband, | |
1fa25e41 LR |
1375 | const struct ieee80211_regdomain *regd) |
1376 | { | |
1377 | unsigned int i; | |
1fa25e41 | 1378 | |
fdc9d7b2 JB |
1379 | if (!sband) |
1380 | return; | |
1fa25e41 LR |
1381 | |
1382 | for (i = 0; i < sband->n_channels; i++) | |
fdc9d7b2 | 1383 | handle_channel_custom(wiphy, &sband->channels[i], regd); |
1fa25e41 LR |
1384 | } |
1385 | ||
1386 | /* Used by drivers prior to wiphy registration */ | |
1387 | void wiphy_apply_custom_regulatory(struct wiphy *wiphy, | |
1388 | const struct ieee80211_regdomain *regd) | |
1389 | { | |
1390 | enum ieee80211_band band; | |
bbcf3f02 | 1391 | unsigned int bands_set = 0; |
ac46d48e | 1392 | |
a2f73b6c LR |
1393 | WARN(!(wiphy->regulatory_flags & REGULATORY_CUSTOM_REG), |
1394 | "wiphy should have REGULATORY_CUSTOM_REG\n"); | |
1395 | wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG; | |
222ea581 | 1396 | |
1fa25e41 | 1397 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) { |
bbcf3f02 LR |
1398 | if (!wiphy->bands[band]) |
1399 | continue; | |
fdc9d7b2 | 1400 | handle_band_custom(wiphy, wiphy->bands[band], regd); |
bbcf3f02 | 1401 | bands_set++; |
b2e1b302 | 1402 | } |
bbcf3f02 LR |
1403 | |
1404 | /* | |
1405 | * no point in calling this if it won't have any effect | |
1a919318 | 1406 | * on your device's supported bands. |
bbcf3f02 LR |
1407 | */ |
1408 | WARN_ON(!bands_set); | |
b2e1b302 | 1409 | } |
1fa25e41 LR |
1410 | EXPORT_SYMBOL(wiphy_apply_custom_regulatory); |
1411 | ||
b2e253cf LR |
1412 | static void reg_set_request_processed(void) |
1413 | { | |
1414 | bool need_more_processing = false; | |
c492db37 | 1415 | struct regulatory_request *lr = get_last_request(); |
b2e253cf | 1416 | |
c492db37 | 1417 | lr->processed = true; |
b2e253cf LR |
1418 | |
1419 | spin_lock(®_requests_lock); | |
1420 | if (!list_empty(®_requests_list)) | |
1421 | need_more_processing = true; | |
1422 | spin_unlock(®_requests_lock); | |
1423 | ||
c492db37 | 1424 | if (lr->initiator == NL80211_REGDOM_SET_BY_USER) |
fe20b39e | 1425 | cancel_delayed_work(®_timeout); |
a90c7a31 | 1426 | |
b2e253cf LR |
1427 | if (need_more_processing) |
1428 | schedule_work(®_work); | |
1429 | } | |
1430 | ||
b3eb7f3f LR |
1431 | /** |
1432 | * reg_process_hint_core - process core regulatory requests | |
1433 | * @pending_request: a pending core regulatory request | |
1434 | * | |
1435 | * The wireless subsystem can use this function to process | |
1436 | * a regulatory request issued by the regulatory core. | |
1437 | * | |
1438 | * Returns one of the different reg request treatment values. | |
1439 | */ | |
1440 | static enum reg_request_treatment | |
1441 | reg_process_hint_core(struct regulatory_request *core_request) | |
1442 | { | |
b3eb7f3f LR |
1443 | |
1444 | core_request->intersect = false; | |
1445 | core_request->processed = false; | |
5ad6ef5e | 1446 | |
05f1a3ea | 1447 | reg_update_last_request(core_request); |
b3eb7f3f | 1448 | |
fe6631ff | 1449 | return reg_call_crda(core_request); |
b3eb7f3f LR |
1450 | } |
1451 | ||
0d97a619 LR |
1452 | static enum reg_request_treatment |
1453 | __reg_process_hint_user(struct regulatory_request *user_request) | |
1454 | { | |
1455 | struct regulatory_request *lr = get_last_request(); | |
1456 | ||
1457 | if (reg_request_cell_base(user_request)) | |
1458 | return reg_ignore_cell_hint(user_request); | |
1459 | ||
1460 | if (reg_request_cell_base(lr)) | |
1461 | return REG_REQ_IGNORE; | |
1462 | ||
1463 | if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) | |
1464 | return REG_REQ_INTERSECT; | |
1465 | /* | |
1466 | * If the user knows better the user should set the regdom | |
1467 | * to their country before the IE is picked up | |
1468 | */ | |
1469 | if (lr->initiator == NL80211_REGDOM_SET_BY_USER && | |
1470 | lr->intersect) | |
1471 | return REG_REQ_IGNORE; | |
1472 | /* | |
1473 | * Process user requests only after previous user/driver/core | |
1474 | * requests have been processed | |
1475 | */ | |
1476 | if ((lr->initiator == NL80211_REGDOM_SET_BY_CORE || | |
1477 | lr->initiator == NL80211_REGDOM_SET_BY_DRIVER || | |
1478 | lr->initiator == NL80211_REGDOM_SET_BY_USER) && | |
1479 | regdom_changes(lr->alpha2)) | |
1480 | return REG_REQ_IGNORE; | |
1481 | ||
1482 | if (!regdom_changes(user_request->alpha2)) | |
1483 | return REG_REQ_ALREADY_SET; | |
1484 | ||
1485 | return REG_REQ_OK; | |
1486 | } | |
1487 | ||
1488 | /** | |
1489 | * reg_process_hint_user - process user regulatory requests | |
1490 | * @user_request: a pending user regulatory request | |
1491 | * | |
1492 | * The wireless subsystem can use this function to process | |
1493 | * a regulatory request initiated by userspace. | |
1494 | * | |
1495 | * Returns one of the different reg request treatment values. | |
1496 | */ | |
1497 | static enum reg_request_treatment | |
1498 | reg_process_hint_user(struct regulatory_request *user_request) | |
1499 | { | |
1500 | enum reg_request_treatment treatment; | |
0d97a619 LR |
1501 | |
1502 | treatment = __reg_process_hint_user(user_request); | |
1503 | if (treatment == REG_REQ_IGNORE || | |
1504 | treatment == REG_REQ_ALREADY_SET) { | |
1505 | kfree(user_request); | |
1506 | return treatment; | |
1507 | } | |
1508 | ||
0d97a619 LR |
1509 | user_request->intersect = treatment == REG_REQ_INTERSECT; |
1510 | user_request->processed = false; | |
5ad6ef5e | 1511 | |
05f1a3ea | 1512 | reg_update_last_request(user_request); |
0d97a619 LR |
1513 | |
1514 | user_alpha2[0] = user_request->alpha2[0]; | |
1515 | user_alpha2[1] = user_request->alpha2[1]; | |
1516 | ||
fe6631ff | 1517 | return reg_call_crda(user_request); |
0d97a619 LR |
1518 | } |
1519 | ||
21636c7f LR |
1520 | static enum reg_request_treatment |
1521 | __reg_process_hint_driver(struct regulatory_request *driver_request) | |
1522 | { | |
1523 | struct regulatory_request *lr = get_last_request(); | |
1524 | ||
1525 | if (lr->initiator == NL80211_REGDOM_SET_BY_CORE) { | |
1526 | if (regdom_changes(driver_request->alpha2)) | |
1527 | return REG_REQ_OK; | |
1528 | return REG_REQ_ALREADY_SET; | |
1529 | } | |
1530 | ||
1531 | /* | |
1532 | * This would happen if you unplug and plug your card | |
1533 | * back in or if you add a new device for which the previously | |
1534 | * loaded card also agrees on the regulatory domain. | |
1535 | */ | |
1536 | if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER && | |
1537 | !regdom_changes(driver_request->alpha2)) | |
1538 | return REG_REQ_ALREADY_SET; | |
1539 | ||
1540 | return REG_REQ_INTERSECT; | |
1541 | } | |
1542 | ||
1543 | /** | |
1544 | * reg_process_hint_driver - process driver regulatory requests | |
1545 | * @driver_request: a pending driver regulatory request | |
1546 | * | |
1547 | * The wireless subsystem can use this function to process | |
1548 | * a regulatory request issued by an 802.11 driver. | |
1549 | * | |
1550 | * Returns one of the different reg request treatment values. | |
1551 | */ | |
1552 | static enum reg_request_treatment | |
1553 | reg_process_hint_driver(struct wiphy *wiphy, | |
1554 | struct regulatory_request *driver_request) | |
1555 | { | |
1556 | const struct ieee80211_regdomain *regd; | |
1557 | enum reg_request_treatment treatment; | |
21636c7f LR |
1558 | |
1559 | treatment = __reg_process_hint_driver(driver_request); | |
1560 | ||
1561 | switch (treatment) { | |
1562 | case REG_REQ_OK: | |
1563 | break; | |
1564 | case REG_REQ_IGNORE: | |
1565 | kfree(driver_request); | |
1566 | return treatment; | |
1567 | case REG_REQ_INTERSECT: | |
1568 | /* fall through */ | |
1569 | case REG_REQ_ALREADY_SET: | |
1570 | regd = reg_copy_regd(get_cfg80211_regdom()); | |
1571 | if (IS_ERR(regd)) { | |
1572 | kfree(driver_request); | |
1573 | return REG_REQ_IGNORE; | |
1574 | } | |
1575 | rcu_assign_pointer(wiphy->regd, regd); | |
1576 | } | |
1577 | ||
21636c7f LR |
1578 | |
1579 | driver_request->intersect = treatment == REG_REQ_INTERSECT; | |
1580 | driver_request->processed = false; | |
5ad6ef5e | 1581 | |
05f1a3ea | 1582 | reg_update_last_request(driver_request); |
21636c7f LR |
1583 | |
1584 | /* | |
1585 | * Since CRDA will not be called in this case as we already | |
1586 | * have applied the requested regulatory domain before we just | |
1587 | * inform userspace we have processed the request | |
1588 | */ | |
1589 | if (treatment == REG_REQ_ALREADY_SET) { | |
1590 | nl80211_send_reg_change_event(driver_request); | |
1591 | reg_set_request_processed(); | |
1592 | return treatment; | |
1593 | } | |
1594 | ||
fe6631ff | 1595 | return reg_call_crda(driver_request); |
21636c7f LR |
1596 | } |
1597 | ||
b23e7a9e LR |
1598 | static enum reg_request_treatment |
1599 | __reg_process_hint_country_ie(struct wiphy *wiphy, | |
1600 | struct regulatory_request *country_ie_request) | |
1601 | { | |
1602 | struct wiphy *last_wiphy = NULL; | |
1603 | struct regulatory_request *lr = get_last_request(); | |
1604 | ||
1605 | if (reg_request_cell_base(lr)) { | |
1606 | /* Trust a Cell base station over the AP's country IE */ | |
1607 | if (regdom_changes(country_ie_request->alpha2)) | |
1608 | return REG_REQ_IGNORE; | |
1609 | return REG_REQ_ALREADY_SET; | |
2a901468 LR |
1610 | } else { |
1611 | if (wiphy->regulatory_flags & REGULATORY_COUNTRY_IE_IGNORE) | |
1612 | return REG_REQ_IGNORE; | |
b23e7a9e LR |
1613 | } |
1614 | ||
b23e7a9e LR |
1615 | if (unlikely(!is_an_alpha2(country_ie_request->alpha2))) |
1616 | return -EINVAL; | |
2f1c6c57 LR |
1617 | |
1618 | if (lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE) | |
1619 | return REG_REQ_OK; | |
1620 | ||
1621 | last_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx); | |
1622 | ||
1623 | if (last_wiphy != wiphy) { | |
b23e7a9e | 1624 | /* |
2f1c6c57 LR |
1625 | * Two cards with two APs claiming different |
1626 | * Country IE alpha2s. We could | |
1627 | * intersect them, but that seems unlikely | |
1628 | * to be correct. Reject second one for now. | |
b23e7a9e | 1629 | */ |
2f1c6c57 LR |
1630 | if (regdom_changes(country_ie_request->alpha2)) |
1631 | return REG_REQ_IGNORE; | |
b23e7a9e LR |
1632 | return REG_REQ_ALREADY_SET; |
1633 | } | |
2f1c6c57 LR |
1634 | /* |
1635 | * Two consecutive Country IE hints on the same wiphy. | |
1636 | * This should be picked up early by the driver/stack | |
1637 | */ | |
1638 | if (WARN_ON(regdom_changes(country_ie_request->alpha2))) | |
1639 | return REG_REQ_OK; | |
1640 | return REG_REQ_ALREADY_SET; | |
b23e7a9e LR |
1641 | } |
1642 | ||
d1c96a9a | 1643 | /** |
b23e7a9e LR |
1644 | * reg_process_hint_country_ie - process regulatory requests from country IEs |
1645 | * @country_ie_request: a regulatory request from a country IE | |
d1c96a9a | 1646 | * |
b23e7a9e LR |
1647 | * The wireless subsystem can use this function to process |
1648 | * a regulatory request issued by a country Information Element. | |
d1c96a9a | 1649 | * |
2f92212b | 1650 | * Returns one of the different reg request treatment values. |
d1c96a9a | 1651 | */ |
2f92212b | 1652 | static enum reg_request_treatment |
b23e7a9e LR |
1653 | reg_process_hint_country_ie(struct wiphy *wiphy, |
1654 | struct regulatory_request *country_ie_request) | |
b2e1b302 | 1655 | { |
2f92212b | 1656 | enum reg_request_treatment treatment; |
761cf7ec | 1657 | |
b23e7a9e | 1658 | treatment = __reg_process_hint_country_ie(wiphy, country_ie_request); |
9c96477d | 1659 | |
2f92212b | 1660 | switch (treatment) { |
2f92212b JB |
1661 | case REG_REQ_OK: |
1662 | break; | |
b23e7a9e LR |
1663 | case REG_REQ_IGNORE: |
1664 | /* fall through */ | |
1665 | case REG_REQ_ALREADY_SET: | |
1666 | kfree(country_ie_request); | |
1667 | return treatment; | |
1668 | case REG_REQ_INTERSECT: | |
1669 | kfree(country_ie_request); | |
fb1fc7ad | 1670 | /* |
b23e7a9e LR |
1671 | * This doesn't happen yet, not sure we |
1672 | * ever want to support it for this case. | |
fb1fc7ad | 1673 | */ |
b23e7a9e LR |
1674 | WARN_ONCE(1, "Unexpected intersection for country IEs"); |
1675 | return REG_REQ_IGNORE; | |
3e0c3ff3 | 1676 | } |
b2e1b302 | 1677 | |
b23e7a9e LR |
1678 | country_ie_request->intersect = false; |
1679 | country_ie_request->processed = false; | |
5ad6ef5e | 1680 | |
05f1a3ea | 1681 | reg_update_last_request(country_ie_request); |
3e0c3ff3 | 1682 | |
fe6631ff | 1683 | return reg_call_crda(country_ie_request); |
b2e1b302 LR |
1684 | } |
1685 | ||
30a548c7 | 1686 | /* This processes *all* regulatory hints */ |
1daa37c7 | 1687 | static void reg_process_hint(struct regulatory_request *reg_request) |
fe33eb39 | 1688 | { |
fe33eb39 | 1689 | struct wiphy *wiphy = NULL; |
b3eb7f3f | 1690 | enum reg_request_treatment treatment; |
fe33eb39 | 1691 | |
f4173766 | 1692 | if (reg_request->wiphy_idx != WIPHY_IDX_INVALID) |
fe33eb39 LR |
1693 | wiphy = wiphy_idx_to_wiphy(reg_request->wiphy_idx); |
1694 | ||
b3eb7f3f LR |
1695 | switch (reg_request->initiator) { |
1696 | case NL80211_REGDOM_SET_BY_CORE: | |
1697 | reg_process_hint_core(reg_request); | |
1698 | return; | |
1699 | case NL80211_REGDOM_SET_BY_USER: | |
0d97a619 LR |
1700 | treatment = reg_process_hint_user(reg_request); |
1701 | if (treatment == REG_REQ_OK || | |
1702 | treatment == REG_REQ_ALREADY_SET) | |
1703 | return; | |
845f3351 SD |
1704 | queue_delayed_work(system_power_efficient_wq, |
1705 | ®_timeout, msecs_to_jiffies(3142)); | |
0d97a619 | 1706 | return; |
b3eb7f3f | 1707 | case NL80211_REGDOM_SET_BY_DRIVER: |
772f0389 IP |
1708 | if (!wiphy) |
1709 | goto out_free; | |
21636c7f LR |
1710 | treatment = reg_process_hint_driver(wiphy, reg_request); |
1711 | break; | |
b3eb7f3f | 1712 | case NL80211_REGDOM_SET_BY_COUNTRY_IE: |
772f0389 IP |
1713 | if (!wiphy) |
1714 | goto out_free; | |
b23e7a9e | 1715 | treatment = reg_process_hint_country_ie(wiphy, reg_request); |
b3eb7f3f LR |
1716 | break; |
1717 | default: | |
1718 | WARN(1, "invalid initiator %d\n", reg_request->initiator); | |
772f0389 | 1719 | goto out_free; |
b3eb7f3f LR |
1720 | } |
1721 | ||
b23e7a9e LR |
1722 | /* This is required so that the orig_* parameters are saved */ |
1723 | if (treatment == REG_REQ_ALREADY_SET && wiphy && | |
a2f73b6c | 1724 | wiphy->regulatory_flags & REGULATORY_STRICT_REG) |
b23e7a9e | 1725 | wiphy_update_regulatory(wiphy, reg_request->initiator); |
772f0389 IP |
1726 | |
1727 | return; | |
1728 | ||
1729 | out_free: | |
1730 | kfree(reg_request); | |
fe33eb39 LR |
1731 | } |
1732 | ||
b2e253cf LR |
1733 | /* |
1734 | * Processes regulatory hints, this is all the NL80211_REGDOM_SET_BY_* | |
1735 | * Regulatory hints come on a first come first serve basis and we | |
1736 | * must process each one atomically. | |
1737 | */ | |
fe33eb39 | 1738 | static void reg_process_pending_hints(void) |
b0e2880b | 1739 | { |
c492db37 | 1740 | struct regulatory_request *reg_request, *lr; |
fe33eb39 | 1741 | |
c492db37 | 1742 | lr = get_last_request(); |
b0e2880b | 1743 | |
b2e253cf | 1744 | /* When last_request->processed becomes true this will be rescheduled */ |
c492db37 | 1745 | if (lr && !lr->processed) { |
1a919318 | 1746 | REG_DBG_PRINT("Pending regulatory request, waiting for it to be processed...\n"); |
5fe231e8 | 1747 | return; |
b2e253cf LR |
1748 | } |
1749 | ||
fe33eb39 | 1750 | spin_lock(®_requests_lock); |
fe33eb39 | 1751 | |
b2e253cf | 1752 | if (list_empty(®_requests_list)) { |
d951c1dd | 1753 | spin_unlock(®_requests_lock); |
5fe231e8 | 1754 | return; |
fe33eb39 | 1755 | } |
b2e253cf LR |
1756 | |
1757 | reg_request = list_first_entry(®_requests_list, | |
1758 | struct regulatory_request, | |
1759 | list); | |
1760 | list_del_init(®_request->list); | |
1761 | ||
fe33eb39 | 1762 | spin_unlock(®_requests_lock); |
b0e2880b | 1763 | |
1daa37c7 | 1764 | reg_process_hint(reg_request); |
fe33eb39 LR |
1765 | } |
1766 | ||
e38f8a7a LR |
1767 | /* Processes beacon hints -- this has nothing to do with country IEs */ |
1768 | static void reg_process_pending_beacon_hints(void) | |
1769 | { | |
79c97e97 | 1770 | struct cfg80211_registered_device *rdev; |
e38f8a7a LR |
1771 | struct reg_beacon *pending_beacon, *tmp; |
1772 | ||
e38f8a7a LR |
1773 | /* This goes through the _pending_ beacon list */ |
1774 | spin_lock_bh(®_pending_beacons_lock); | |
1775 | ||
e38f8a7a LR |
1776 | list_for_each_entry_safe(pending_beacon, tmp, |
1777 | ®_pending_beacons, list) { | |
e38f8a7a LR |
1778 | list_del_init(&pending_beacon->list); |
1779 | ||
1780 | /* Applies the beacon hint to current wiphys */ | |
79c97e97 JB |
1781 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) |
1782 | wiphy_update_new_beacon(&rdev->wiphy, pending_beacon); | |
e38f8a7a LR |
1783 | |
1784 | /* Remembers the beacon hint for new wiphys or reg changes */ | |
1785 | list_add_tail(&pending_beacon->list, ®_beacon_list); | |
1786 | } | |
1787 | ||
1788 | spin_unlock_bh(®_pending_beacons_lock); | |
e38f8a7a LR |
1789 | } |
1790 | ||
fe33eb39 LR |
1791 | static void reg_todo(struct work_struct *work) |
1792 | { | |
5fe231e8 | 1793 | rtnl_lock(); |
fe33eb39 | 1794 | reg_process_pending_hints(); |
e38f8a7a | 1795 | reg_process_pending_beacon_hints(); |
5fe231e8 | 1796 | rtnl_unlock(); |
fe33eb39 LR |
1797 | } |
1798 | ||
fe33eb39 LR |
1799 | static void queue_regulatory_request(struct regulatory_request *request) |
1800 | { | |
d4f2c881 JB |
1801 | request->alpha2[0] = toupper(request->alpha2[0]); |
1802 | request->alpha2[1] = toupper(request->alpha2[1]); | |
c61029c7 | 1803 | |
fe33eb39 LR |
1804 | spin_lock(®_requests_lock); |
1805 | list_add_tail(&request->list, ®_requests_list); | |
1806 | spin_unlock(®_requests_lock); | |
1807 | ||
1808 | schedule_work(®_work); | |
1809 | } | |
1810 | ||
09d989d1 LR |
1811 | /* |
1812 | * Core regulatory hint -- happens during cfg80211_init() | |
1813 | * and when we restore regulatory settings. | |
1814 | */ | |
ba25c141 LR |
1815 | static int regulatory_hint_core(const char *alpha2) |
1816 | { | |
1817 | struct regulatory_request *request; | |
1818 | ||
1a919318 | 1819 | request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); |
ba25c141 LR |
1820 | if (!request) |
1821 | return -ENOMEM; | |
1822 | ||
1823 | request->alpha2[0] = alpha2[0]; | |
1824 | request->alpha2[1] = alpha2[1]; | |
7db90f4a | 1825 | request->initiator = NL80211_REGDOM_SET_BY_CORE; |
ba25c141 | 1826 | |
31e99729 | 1827 | queue_regulatory_request(request); |
5078b2e3 | 1828 | |
fe33eb39 | 1829 | return 0; |
ba25c141 LR |
1830 | } |
1831 | ||
fe33eb39 | 1832 | /* User hints */ |
57b5ce07 LR |
1833 | int regulatory_hint_user(const char *alpha2, |
1834 | enum nl80211_user_reg_hint_type user_reg_hint_type) | |
b2e1b302 | 1835 | { |
fe33eb39 LR |
1836 | struct regulatory_request *request; |
1837 | ||
fdc9d7b2 JB |
1838 | if (WARN_ON(!alpha2)) |
1839 | return -EINVAL; | |
b2e1b302 | 1840 | |
fe33eb39 LR |
1841 | request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); |
1842 | if (!request) | |
1843 | return -ENOMEM; | |
1844 | ||
f4173766 | 1845 | request->wiphy_idx = WIPHY_IDX_INVALID; |
fe33eb39 LR |
1846 | request->alpha2[0] = alpha2[0]; |
1847 | request->alpha2[1] = alpha2[1]; | |
e12822e1 | 1848 | request->initiator = NL80211_REGDOM_SET_BY_USER; |
57b5ce07 | 1849 | request->user_reg_hint_type = user_reg_hint_type; |
fe33eb39 LR |
1850 | |
1851 | queue_regulatory_request(request); | |
1852 | ||
1853 | return 0; | |
1854 | } | |
1855 | ||
1856 | /* Driver hints */ | |
1857 | int regulatory_hint(struct wiphy *wiphy, const char *alpha2) | |
1858 | { | |
1859 | struct regulatory_request *request; | |
1860 | ||
fdc9d7b2 JB |
1861 | if (WARN_ON(!alpha2 || !wiphy)) |
1862 | return -EINVAL; | |
fe33eb39 | 1863 | |
4f7b9140 LR |
1864 | wiphy->regulatory_flags &= ~REGULATORY_CUSTOM_REG; |
1865 | ||
fe33eb39 LR |
1866 | request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); |
1867 | if (!request) | |
1868 | return -ENOMEM; | |
1869 | ||
1870 | request->wiphy_idx = get_wiphy_idx(wiphy); | |
1871 | ||
fe33eb39 LR |
1872 | request->alpha2[0] = alpha2[0]; |
1873 | request->alpha2[1] = alpha2[1]; | |
7db90f4a | 1874 | request->initiator = NL80211_REGDOM_SET_BY_DRIVER; |
fe33eb39 LR |
1875 | |
1876 | queue_regulatory_request(request); | |
1877 | ||
1878 | return 0; | |
b2e1b302 LR |
1879 | } |
1880 | EXPORT_SYMBOL(regulatory_hint); | |
1881 | ||
789fd033 LR |
1882 | void regulatory_hint_country_ie(struct wiphy *wiphy, enum ieee80211_band band, |
1883 | const u8 *country_ie, u8 country_ie_len) | |
3f2355cb | 1884 | { |
3f2355cb | 1885 | char alpha2[2]; |
3f2355cb | 1886 | enum environment_cap env = ENVIRON_ANY; |
db2424c5 | 1887 | struct regulatory_request *request = NULL, *lr; |
d335fe63 | 1888 | |
3f2355cb LR |
1889 | /* IE len must be evenly divisible by 2 */ |
1890 | if (country_ie_len & 0x01) | |
db2424c5 | 1891 | return; |
3f2355cb LR |
1892 | |
1893 | if (country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN) | |
db2424c5 JB |
1894 | return; |
1895 | ||
1896 | request = kzalloc(sizeof(*request), GFP_KERNEL); | |
1897 | if (!request) | |
1898 | return; | |
3f2355cb | 1899 | |
3f2355cb LR |
1900 | alpha2[0] = country_ie[0]; |
1901 | alpha2[1] = country_ie[1]; | |
1902 | ||
1903 | if (country_ie[2] == 'I') | |
1904 | env = ENVIRON_INDOOR; | |
1905 | else if (country_ie[2] == 'O') | |
1906 | env = ENVIRON_OUTDOOR; | |
1907 | ||
db2424c5 JB |
1908 | rcu_read_lock(); |
1909 | lr = get_last_request(); | |
1910 | ||
1911 | if (unlikely(!lr)) | |
1912 | goto out; | |
1913 | ||
fb1fc7ad | 1914 | /* |
8b19e6ca | 1915 | * We will run this only upon a successful connection on cfg80211. |
4b44c8bc | 1916 | * We leave conflict resolution to the workqueue, where can hold |
5fe231e8 | 1917 | * the RTNL. |
fb1fc7ad | 1918 | */ |
c492db37 JB |
1919 | if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE && |
1920 | lr->wiphy_idx != WIPHY_IDX_INVALID) | |
4b44c8bc | 1921 | goto out; |
3f2355cb | 1922 | |
fe33eb39 | 1923 | request->wiphy_idx = get_wiphy_idx(wiphy); |
4f366c5d JL |
1924 | request->alpha2[0] = alpha2[0]; |
1925 | request->alpha2[1] = alpha2[1]; | |
7db90f4a | 1926 | request->initiator = NL80211_REGDOM_SET_BY_COUNTRY_IE; |
fe33eb39 LR |
1927 | request->country_ie_env = env; |
1928 | ||
fe33eb39 | 1929 | queue_regulatory_request(request); |
db2424c5 | 1930 | request = NULL; |
3f2355cb | 1931 | out: |
db2424c5 JB |
1932 | kfree(request); |
1933 | rcu_read_unlock(); | |
3f2355cb | 1934 | } |
b2e1b302 | 1935 | |
09d989d1 LR |
1936 | static void restore_alpha2(char *alpha2, bool reset_user) |
1937 | { | |
1938 | /* indicates there is no alpha2 to consider for restoration */ | |
1939 | alpha2[0] = '9'; | |
1940 | alpha2[1] = '7'; | |
1941 | ||
1942 | /* The user setting has precedence over the module parameter */ | |
1943 | if (is_user_regdom_saved()) { | |
1944 | /* Unless we're asked to ignore it and reset it */ | |
1945 | if (reset_user) { | |
1a919318 | 1946 | REG_DBG_PRINT("Restoring regulatory settings including user preference\n"); |
09d989d1 LR |
1947 | user_alpha2[0] = '9'; |
1948 | user_alpha2[1] = '7'; | |
1949 | ||
1950 | /* | |
1951 | * If we're ignoring user settings, we still need to | |
1952 | * check the module parameter to ensure we put things | |
1953 | * back as they were for a full restore. | |
1954 | */ | |
1955 | if (!is_world_regdom(ieee80211_regdom)) { | |
1a919318 JB |
1956 | REG_DBG_PRINT("Keeping preference on module parameter ieee80211_regdom: %c%c\n", |
1957 | ieee80211_regdom[0], ieee80211_regdom[1]); | |
09d989d1 LR |
1958 | alpha2[0] = ieee80211_regdom[0]; |
1959 | alpha2[1] = ieee80211_regdom[1]; | |
1960 | } | |
1961 | } else { | |
1a919318 JB |
1962 | REG_DBG_PRINT("Restoring regulatory settings while preserving user preference for: %c%c\n", |
1963 | user_alpha2[0], user_alpha2[1]); | |
09d989d1 LR |
1964 | alpha2[0] = user_alpha2[0]; |
1965 | alpha2[1] = user_alpha2[1]; | |
1966 | } | |
1967 | } else if (!is_world_regdom(ieee80211_regdom)) { | |
1a919318 JB |
1968 | REG_DBG_PRINT("Keeping preference on module parameter ieee80211_regdom: %c%c\n", |
1969 | ieee80211_regdom[0], ieee80211_regdom[1]); | |
09d989d1 LR |
1970 | alpha2[0] = ieee80211_regdom[0]; |
1971 | alpha2[1] = ieee80211_regdom[1]; | |
1972 | } else | |
d91e41b6 | 1973 | REG_DBG_PRINT("Restoring regulatory settings\n"); |
09d989d1 LR |
1974 | } |
1975 | ||
5ce543d1 RM |
1976 | static void restore_custom_reg_settings(struct wiphy *wiphy) |
1977 | { | |
1978 | struct ieee80211_supported_band *sband; | |
1979 | enum ieee80211_band band; | |
1980 | struct ieee80211_channel *chan; | |
1981 | int i; | |
1982 | ||
1983 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) { | |
1984 | sband = wiphy->bands[band]; | |
1985 | if (!sband) | |
1986 | continue; | |
1987 | for (i = 0; i < sband->n_channels; i++) { | |
1988 | chan = &sband->channels[i]; | |
1989 | chan->flags = chan->orig_flags; | |
1990 | chan->max_antenna_gain = chan->orig_mag; | |
1991 | chan->max_power = chan->orig_mpwr; | |
899852af | 1992 | chan->beacon_found = false; |
5ce543d1 RM |
1993 | } |
1994 | } | |
1995 | } | |
1996 | ||
09d989d1 LR |
1997 | /* |
1998 | * Restoring regulatory settings involves ingoring any | |
1999 | * possibly stale country IE information and user regulatory | |
2000 | * settings if so desired, this includes any beacon hints | |
2001 | * learned as we could have traveled outside to another country | |
2002 | * after disconnection. To restore regulatory settings we do | |
2003 | * exactly what we did at bootup: | |
2004 | * | |
2005 | * - send a core regulatory hint | |
2006 | * - send a user regulatory hint if applicable | |
2007 | * | |
2008 | * Device drivers that send a regulatory hint for a specific country | |
2009 | * keep their own regulatory domain on wiphy->regd so that does does | |
2010 | * not need to be remembered. | |
2011 | */ | |
2012 | static void restore_regulatory_settings(bool reset_user) | |
2013 | { | |
2014 | char alpha2[2]; | |
cee0bec5 | 2015 | char world_alpha2[2]; |
09d989d1 | 2016 | struct reg_beacon *reg_beacon, *btmp; |
14609555 LR |
2017 | struct regulatory_request *reg_request, *tmp; |
2018 | LIST_HEAD(tmp_reg_req_list); | |
5ce543d1 | 2019 | struct cfg80211_registered_device *rdev; |
09d989d1 | 2020 | |
5fe231e8 JB |
2021 | ASSERT_RTNL(); |
2022 | ||
2d319867 | 2023 | reset_regdomains(true, &world_regdom); |
09d989d1 LR |
2024 | restore_alpha2(alpha2, reset_user); |
2025 | ||
14609555 LR |
2026 | /* |
2027 | * If there's any pending requests we simply | |
2028 | * stash them to a temporary pending queue and | |
2029 | * add then after we've restored regulatory | |
2030 | * settings. | |
2031 | */ | |
2032 | spin_lock(®_requests_lock); | |
fea9bced JB |
2033 | list_for_each_entry_safe(reg_request, tmp, ®_requests_list, list) { |
2034 | if (reg_request->initiator != NL80211_REGDOM_SET_BY_USER) | |
2035 | continue; | |
2036 | list_move_tail(®_request->list, &tmp_reg_req_list); | |
14609555 LR |
2037 | } |
2038 | spin_unlock(®_requests_lock); | |
2039 | ||
09d989d1 LR |
2040 | /* Clear beacon hints */ |
2041 | spin_lock_bh(®_pending_beacons_lock); | |
fea9bced JB |
2042 | list_for_each_entry_safe(reg_beacon, btmp, ®_pending_beacons, list) { |
2043 | list_del(®_beacon->list); | |
2044 | kfree(reg_beacon); | |
09d989d1 LR |
2045 | } |
2046 | spin_unlock_bh(®_pending_beacons_lock); | |
2047 | ||
fea9bced JB |
2048 | list_for_each_entry_safe(reg_beacon, btmp, ®_beacon_list, list) { |
2049 | list_del(®_beacon->list); | |
2050 | kfree(reg_beacon); | |
09d989d1 LR |
2051 | } |
2052 | ||
2053 | /* First restore to the basic regulatory settings */ | |
379b82f4 JB |
2054 | world_alpha2[0] = cfg80211_world_regdom->alpha2[0]; |
2055 | world_alpha2[1] = cfg80211_world_regdom->alpha2[1]; | |
09d989d1 | 2056 | |
5ce543d1 | 2057 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) { |
a2f73b6c | 2058 | if (rdev->wiphy.regulatory_flags & REGULATORY_CUSTOM_REG) |
5ce543d1 RM |
2059 | restore_custom_reg_settings(&rdev->wiphy); |
2060 | } | |
2061 | ||
cee0bec5 | 2062 | regulatory_hint_core(world_alpha2); |
09d989d1 LR |
2063 | |
2064 | /* | |
2065 | * This restores the ieee80211_regdom module parameter | |
2066 | * preference or the last user requested regulatory | |
2067 | * settings, user regulatory settings takes precedence. | |
2068 | */ | |
2069 | if (is_an_alpha2(alpha2)) | |
57b5ce07 | 2070 | regulatory_hint_user(user_alpha2, NL80211_USER_REG_HINT_USER); |
09d989d1 | 2071 | |
14609555 | 2072 | spin_lock(®_requests_lock); |
11cff96c | 2073 | list_splice_tail_init(&tmp_reg_req_list, ®_requests_list); |
14609555 LR |
2074 | spin_unlock(®_requests_lock); |
2075 | ||
14609555 LR |
2076 | REG_DBG_PRINT("Kicking the queue\n"); |
2077 | ||
2078 | schedule_work(®_work); | |
2079 | } | |
09d989d1 LR |
2080 | |
2081 | void regulatory_hint_disconnect(void) | |
2082 | { | |
1a919318 | 2083 | REG_DBG_PRINT("All devices are disconnected, going to restore regulatory settings\n"); |
09d989d1 LR |
2084 | restore_regulatory_settings(false); |
2085 | } | |
2086 | ||
e38f8a7a LR |
2087 | static bool freq_is_chan_12_13_14(u16 freq) |
2088 | { | |
59eb21a6 BR |
2089 | if (freq == ieee80211_channel_to_frequency(12, IEEE80211_BAND_2GHZ) || |
2090 | freq == ieee80211_channel_to_frequency(13, IEEE80211_BAND_2GHZ) || | |
2091 | freq == ieee80211_channel_to_frequency(14, IEEE80211_BAND_2GHZ)) | |
e38f8a7a LR |
2092 | return true; |
2093 | return false; | |
2094 | } | |
2095 | ||
3ebfa6e7 LR |
2096 | static bool pending_reg_beacon(struct ieee80211_channel *beacon_chan) |
2097 | { | |
2098 | struct reg_beacon *pending_beacon; | |
2099 | ||
2100 | list_for_each_entry(pending_beacon, ®_pending_beacons, list) | |
2101 | if (beacon_chan->center_freq == | |
2102 | pending_beacon->chan.center_freq) | |
2103 | return true; | |
2104 | return false; | |
2105 | } | |
2106 | ||
e38f8a7a LR |
2107 | int regulatory_hint_found_beacon(struct wiphy *wiphy, |
2108 | struct ieee80211_channel *beacon_chan, | |
2109 | gfp_t gfp) | |
2110 | { | |
2111 | struct reg_beacon *reg_beacon; | |
3ebfa6e7 | 2112 | bool processing; |
e38f8a7a | 2113 | |
1a919318 JB |
2114 | if (beacon_chan->beacon_found || |
2115 | beacon_chan->flags & IEEE80211_CHAN_RADAR || | |
e38f8a7a | 2116 | (beacon_chan->band == IEEE80211_BAND_2GHZ && |
1a919318 | 2117 | !freq_is_chan_12_13_14(beacon_chan->center_freq))) |
e38f8a7a LR |
2118 | return 0; |
2119 | ||
3ebfa6e7 LR |
2120 | spin_lock_bh(®_pending_beacons_lock); |
2121 | processing = pending_reg_beacon(beacon_chan); | |
2122 | spin_unlock_bh(®_pending_beacons_lock); | |
2123 | ||
2124 | if (processing) | |
e38f8a7a LR |
2125 | return 0; |
2126 | ||
2127 | reg_beacon = kzalloc(sizeof(struct reg_beacon), gfp); | |
2128 | if (!reg_beacon) | |
2129 | return -ENOMEM; | |
2130 | ||
1a919318 | 2131 | REG_DBG_PRINT("Found new beacon on frequency: %d MHz (Ch %d) on %s\n", |
4113f751 LR |
2132 | beacon_chan->center_freq, |
2133 | ieee80211_frequency_to_channel(beacon_chan->center_freq), | |
2134 | wiphy_name(wiphy)); | |
2135 | ||
e38f8a7a | 2136 | memcpy(®_beacon->chan, beacon_chan, |
1a919318 | 2137 | sizeof(struct ieee80211_channel)); |
e38f8a7a LR |
2138 | |
2139 | /* | |
2140 | * Since we can be called from BH or and non-BH context | |
2141 | * we must use spin_lock_bh() | |
2142 | */ | |
2143 | spin_lock_bh(®_pending_beacons_lock); | |
2144 | list_add_tail(®_beacon->list, ®_pending_beacons); | |
2145 | spin_unlock_bh(®_pending_beacons_lock); | |
2146 | ||
2147 | schedule_work(®_work); | |
2148 | ||
2149 | return 0; | |
2150 | } | |
2151 | ||
a3d2eaf0 | 2152 | static void print_rd_rules(const struct ieee80211_regdomain *rd) |
b2e1b302 LR |
2153 | { |
2154 | unsigned int i; | |
a3d2eaf0 JB |
2155 | const struct ieee80211_reg_rule *reg_rule = NULL; |
2156 | const struct ieee80211_freq_range *freq_range = NULL; | |
2157 | const struct ieee80211_power_rule *power_rule = NULL; | |
b2e1b302 | 2158 | |
6653325a | 2159 | pr_info(" (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)\n"); |
b2e1b302 LR |
2160 | |
2161 | for (i = 0; i < rd->n_reg_rules; i++) { | |
2162 | reg_rule = &rd->reg_rules[i]; | |
2163 | freq_range = ®_rule->freq_range; | |
2164 | power_rule = ®_rule->power_rule; | |
2165 | ||
fb1fc7ad LR |
2166 | /* |
2167 | * There may not be documentation for max antenna gain | |
2168 | * in certain regions | |
2169 | */ | |
b2e1b302 | 2170 | if (power_rule->max_antenna_gain) |
6653325a | 2171 | pr_info(" (%d KHz - %d KHz @ %d KHz), (%d mBi, %d mBm)\n", |
b2e1b302 LR |
2172 | freq_range->start_freq_khz, |
2173 | freq_range->end_freq_khz, | |
2174 | freq_range->max_bandwidth_khz, | |
2175 | power_rule->max_antenna_gain, | |
2176 | power_rule->max_eirp); | |
2177 | else | |
6653325a | 2178 | pr_info(" (%d KHz - %d KHz @ %d KHz), (N/A, %d mBm)\n", |
b2e1b302 LR |
2179 | freq_range->start_freq_khz, |
2180 | freq_range->end_freq_khz, | |
2181 | freq_range->max_bandwidth_khz, | |
2182 | power_rule->max_eirp); | |
2183 | } | |
2184 | } | |
2185 | ||
4c7d3982 | 2186 | bool reg_supported_dfs_region(enum nl80211_dfs_regions dfs_region) |
8b60b078 LR |
2187 | { |
2188 | switch (dfs_region) { | |
2189 | case NL80211_DFS_UNSET: | |
2190 | case NL80211_DFS_FCC: | |
2191 | case NL80211_DFS_ETSI: | |
2192 | case NL80211_DFS_JP: | |
2193 | return true; | |
2194 | default: | |
2195 | REG_DBG_PRINT("Ignoring uknown DFS master region: %d\n", | |
2196 | dfs_region); | |
2197 | return false; | |
2198 | } | |
2199 | } | |
2200 | ||
a3d2eaf0 | 2201 | static void print_regdomain(const struct ieee80211_regdomain *rd) |
b2e1b302 | 2202 | { |
c492db37 | 2203 | struct regulatory_request *lr = get_last_request(); |
b2e1b302 | 2204 | |
3f2355cb | 2205 | if (is_intersected_alpha2(rd->alpha2)) { |
c492db37 | 2206 | if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) { |
79c97e97 | 2207 | struct cfg80211_registered_device *rdev; |
c492db37 | 2208 | rdev = cfg80211_rdev_by_wiphy_idx(lr->wiphy_idx); |
79c97e97 | 2209 | if (rdev) { |
e9c0268f | 2210 | pr_info("Current regulatory domain updated by AP to: %c%c\n", |
79c97e97 JB |
2211 | rdev->country_ie_alpha2[0], |
2212 | rdev->country_ie_alpha2[1]); | |
3f2355cb | 2213 | } else |
e9c0268f | 2214 | pr_info("Current regulatory domain intersected:\n"); |
3f2355cb | 2215 | } else |
e9c0268f | 2216 | pr_info("Current regulatory domain intersected:\n"); |
1a919318 | 2217 | } else if (is_world_regdom(rd->alpha2)) { |
e9c0268f | 2218 | pr_info("World regulatory domain updated:\n"); |
1a919318 | 2219 | } else { |
b2e1b302 | 2220 | if (is_unknown_alpha2(rd->alpha2)) |
e9c0268f | 2221 | pr_info("Regulatory domain changed to driver built-in settings (unknown country)\n"); |
57b5ce07 | 2222 | else { |
c492db37 | 2223 | if (reg_request_cell_base(lr)) |
1a919318 | 2224 | pr_info("Regulatory domain changed to country: %c%c by Cell Station\n", |
57b5ce07 LR |
2225 | rd->alpha2[0], rd->alpha2[1]); |
2226 | else | |
1a919318 | 2227 | pr_info("Regulatory domain changed to country: %c%c\n", |
57b5ce07 LR |
2228 | rd->alpha2[0], rd->alpha2[1]); |
2229 | } | |
b2e1b302 | 2230 | } |
1a919318 | 2231 | |
3ef121b5 | 2232 | pr_info(" DFS Master region: %s", reg_dfs_region_str(rd->dfs_region)); |
b2e1b302 LR |
2233 | print_rd_rules(rd); |
2234 | } | |
2235 | ||
2df78167 | 2236 | static void print_regdomain_info(const struct ieee80211_regdomain *rd) |
b2e1b302 | 2237 | { |
e9c0268f | 2238 | pr_info("Regulatory domain: %c%c\n", rd->alpha2[0], rd->alpha2[1]); |
b2e1b302 LR |
2239 | print_rd_rules(rd); |
2240 | } | |
2241 | ||
3b9e5aca LR |
2242 | static int reg_set_rd_core(const struct ieee80211_regdomain *rd) |
2243 | { | |
2244 | if (!is_world_regdom(rd->alpha2)) | |
2245 | return -EINVAL; | |
2246 | update_world_regdomain(rd); | |
2247 | return 0; | |
2248 | } | |
2249 | ||
84721d44 LR |
2250 | static int reg_set_rd_user(const struct ieee80211_regdomain *rd, |
2251 | struct regulatory_request *user_request) | |
2252 | { | |
2253 | const struct ieee80211_regdomain *intersected_rd = NULL; | |
2254 | ||
2255 | if (is_world_regdom(rd->alpha2)) | |
2256 | return -EINVAL; | |
2257 | ||
2258 | if (!regdom_changes(rd->alpha2)) | |
2259 | return -EALREADY; | |
2260 | ||
2261 | if (!is_valid_rd(rd)) { | |
2262 | pr_err("Invalid regulatory domain detected:\n"); | |
2263 | print_regdomain_info(rd); | |
2264 | return -EINVAL; | |
2265 | } | |
2266 | ||
2267 | if (!user_request->intersect) { | |
2268 | reset_regdomains(false, rd); | |
2269 | return 0; | |
2270 | } | |
2271 | ||
2272 | intersected_rd = regdom_intersect(rd, get_cfg80211_regdom()); | |
2273 | if (!intersected_rd) | |
2274 | return -EINVAL; | |
2275 | ||
2276 | kfree(rd); | |
2277 | rd = NULL; | |
2278 | reset_regdomains(false, intersected_rd); | |
2279 | ||
2280 | return 0; | |
2281 | } | |
2282 | ||
f5fe3247 LR |
2283 | static int reg_set_rd_driver(const struct ieee80211_regdomain *rd, |
2284 | struct regulatory_request *driver_request) | |
b2e1b302 | 2285 | { |
e9763c3c | 2286 | const struct ieee80211_regdomain *regd; |
9c96477d | 2287 | const struct ieee80211_regdomain *intersected_rd = NULL; |
f5fe3247 | 2288 | const struct ieee80211_regdomain *tmp; |
806a9e39 | 2289 | struct wiphy *request_wiphy; |
6913b49a | 2290 | |
f5fe3247 | 2291 | if (is_world_regdom(rd->alpha2)) |
b2e1b302 LR |
2292 | return -EINVAL; |
2293 | ||
f5fe3247 LR |
2294 | if (!regdom_changes(rd->alpha2)) |
2295 | return -EALREADY; | |
b2e1b302 | 2296 | |
8375af3b | 2297 | if (!is_valid_rd(rd)) { |
e9c0268f | 2298 | pr_err("Invalid regulatory domain detected:\n"); |
8375af3b LR |
2299 | print_regdomain_info(rd); |
2300 | return -EINVAL; | |
b2e1b302 LR |
2301 | } |
2302 | ||
f5fe3247 LR |
2303 | request_wiphy = wiphy_idx_to_wiphy(driver_request->wiphy_idx); |
2304 | if (!request_wiphy) { | |
845f3351 SD |
2305 | queue_delayed_work(system_power_efficient_wq, |
2306 | ®_timeout, 0); | |
de3584bd JB |
2307 | return -ENODEV; |
2308 | } | |
806a9e39 | 2309 | |
f5fe3247 | 2310 | if (!driver_request->intersect) { |
558f6d32 LR |
2311 | if (request_wiphy->regd) |
2312 | return -EALREADY; | |
3e0c3ff3 | 2313 | |
e9763c3c JB |
2314 | regd = reg_copy_regd(rd); |
2315 | if (IS_ERR(regd)) | |
2316 | return PTR_ERR(regd); | |
3e0c3ff3 | 2317 | |
458f4f9e | 2318 | rcu_assign_pointer(request_wiphy->regd, regd); |
379b82f4 | 2319 | reset_regdomains(false, rd); |
b8295acd LR |
2320 | return 0; |
2321 | } | |
2322 | ||
f5fe3247 LR |
2323 | intersected_rd = regdom_intersect(rd, get_cfg80211_regdom()); |
2324 | if (!intersected_rd) | |
2325 | return -EINVAL; | |
b8295acd | 2326 | |
f5fe3247 LR |
2327 | /* |
2328 | * We can trash what CRDA provided now. | |
2329 | * However if a driver requested this specific regulatory | |
2330 | * domain we keep it for its private use | |
2331 | */ | |
2332 | tmp = get_wiphy_regdom(request_wiphy); | |
2333 | rcu_assign_pointer(request_wiphy->regd, rd); | |
2334 | rcu_free_regdom(tmp); | |
b8295acd | 2335 | |
f5fe3247 | 2336 | rd = NULL; |
b7566fc3 | 2337 | |
f5fe3247 | 2338 | reset_regdomains(false, intersected_rd); |
3e0c3ff3 | 2339 | |
f5fe3247 LR |
2340 | return 0; |
2341 | } | |
2342 | ||
01992406 LR |
2343 | static int reg_set_rd_country_ie(const struct ieee80211_regdomain *rd, |
2344 | struct regulatory_request *country_ie_request) | |
f5fe3247 LR |
2345 | { |
2346 | struct wiphy *request_wiphy; | |
b8295acd | 2347 | |
f5fe3247 LR |
2348 | if (!is_alpha2_set(rd->alpha2) && !is_an_alpha2(rd->alpha2) && |
2349 | !is_unknown_alpha2(rd->alpha2)) | |
2350 | return -EINVAL; | |
b8295acd | 2351 | |
f5fe3247 LR |
2352 | /* |
2353 | * Lets only bother proceeding on the same alpha2 if the current | |
2354 | * rd is non static (it means CRDA was present and was used last) | |
2355 | * and the pending request came in from a country IE | |
2356 | */ | |
2357 | ||
2358 | if (!is_valid_rd(rd)) { | |
2359 | pr_err("Invalid regulatory domain detected:\n"); | |
2360 | print_regdomain_info(rd); | |
2361 | return -EINVAL; | |
9c96477d LR |
2362 | } |
2363 | ||
01992406 | 2364 | request_wiphy = wiphy_idx_to_wiphy(country_ie_request->wiphy_idx); |
f5fe3247 | 2365 | if (!request_wiphy) { |
845f3351 SD |
2366 | queue_delayed_work(system_power_efficient_wq, |
2367 | ®_timeout, 0); | |
f5fe3247 LR |
2368 | return -ENODEV; |
2369 | } | |
b2e1b302 | 2370 | |
01992406 | 2371 | if (country_ie_request->intersect) |
f5fe3247 LR |
2372 | return -EINVAL; |
2373 | ||
2374 | reset_regdomains(false, rd); | |
2375 | return 0; | |
2376 | } | |
b2e1b302 | 2377 | |
fb1fc7ad LR |
2378 | /* |
2379 | * Use this call to set the current regulatory domain. Conflicts with | |
b2e1b302 | 2380 | * multiple drivers can be ironed out later. Caller must've already |
458f4f9e | 2381 | * kmalloc'd the rd structure. |
fb1fc7ad | 2382 | */ |
a3d2eaf0 | 2383 | int set_regdom(const struct ieee80211_regdomain *rd) |
b2e1b302 | 2384 | { |
c492db37 | 2385 | struct regulatory_request *lr; |
b2e1b302 LR |
2386 | int r; |
2387 | ||
3b9e5aca LR |
2388 | if (!reg_is_valid_request(rd->alpha2)) { |
2389 | kfree(rd); | |
2390 | return -EINVAL; | |
2391 | } | |
2392 | ||
c492db37 | 2393 | lr = get_last_request(); |
abc7381b | 2394 | |
b2e1b302 | 2395 | /* Note that this doesn't update the wiphys, this is done below */ |
3b9e5aca LR |
2396 | switch (lr->initiator) { |
2397 | case NL80211_REGDOM_SET_BY_CORE: | |
2398 | r = reg_set_rd_core(rd); | |
2399 | break; | |
2400 | case NL80211_REGDOM_SET_BY_USER: | |
84721d44 LR |
2401 | r = reg_set_rd_user(rd, lr); |
2402 | break; | |
3b9e5aca | 2403 | case NL80211_REGDOM_SET_BY_DRIVER: |
f5fe3247 LR |
2404 | r = reg_set_rd_driver(rd, lr); |
2405 | break; | |
3b9e5aca | 2406 | case NL80211_REGDOM_SET_BY_COUNTRY_IE: |
01992406 | 2407 | r = reg_set_rd_country_ie(rd, lr); |
3b9e5aca LR |
2408 | break; |
2409 | default: | |
2410 | WARN(1, "invalid initiator %d\n", lr->initiator); | |
2411 | return -EINVAL; | |
2412 | } | |
2413 | ||
d2372b31 | 2414 | if (r) { |
95908535 KV |
2415 | if (r == -EALREADY) |
2416 | reg_set_request_processed(); | |
2417 | ||
d2372b31 | 2418 | kfree(rd); |
38fd2143 | 2419 | return r; |
d2372b31 | 2420 | } |
b2e1b302 | 2421 | |
b2e1b302 | 2422 | /* This would make this whole thing pointless */ |
38fd2143 JB |
2423 | if (WARN_ON(!lr->intersect && rd != get_cfg80211_regdom())) |
2424 | return -EINVAL; | |
b2e1b302 LR |
2425 | |
2426 | /* update all wiphys now with the new established regulatory domain */ | |
c492db37 | 2427 | update_all_wiphy_regulatory(lr->initiator); |
b2e1b302 | 2428 | |
458f4f9e | 2429 | print_regdomain(get_cfg80211_regdom()); |
b2e1b302 | 2430 | |
c492db37 | 2431 | nl80211_send_reg_change_event(lr); |
73d54c9e | 2432 | |
b2e253cf LR |
2433 | reg_set_request_processed(); |
2434 | ||
38fd2143 | 2435 | return 0; |
b2e1b302 LR |
2436 | } |
2437 | ||
4d9d88d1 SJR |
2438 | int reg_device_uevent(struct device *dev, struct kobj_uevent_env *env) |
2439 | { | |
4a484cff JB |
2440 | struct regulatory_request *lr; |
2441 | u8 alpha2[2]; | |
2442 | bool add = false; | |
c492db37 | 2443 | |
4a484cff JB |
2444 | rcu_read_lock(); |
2445 | lr = get_last_request(); | |
c492db37 | 2446 | if (lr && !lr->processed) { |
4a484cff JB |
2447 | memcpy(alpha2, lr->alpha2, 2); |
2448 | add = true; | |
4d9d88d1 | 2449 | } |
4a484cff | 2450 | rcu_read_unlock(); |
4d9d88d1 | 2451 | |
4a484cff JB |
2452 | if (add) |
2453 | return add_uevent_var(env, "COUNTRY=%c%c", | |
2454 | alpha2[0], alpha2[1]); | |
4d9d88d1 SJR |
2455 | return 0; |
2456 | } | |
4d9d88d1 | 2457 | |
57b5ce07 LR |
2458 | void wiphy_regulatory_register(struct wiphy *wiphy) |
2459 | { | |
23df0b73 AN |
2460 | struct regulatory_request *lr; |
2461 | ||
57b5ce07 LR |
2462 | if (!reg_dev_ignore_cell_hint(wiphy)) |
2463 | reg_num_devs_support_basehint++; | |
2464 | ||
23df0b73 AN |
2465 | lr = get_last_request(); |
2466 | wiphy_update_regulatory(wiphy, lr->initiator); | |
57b5ce07 LR |
2467 | } |
2468 | ||
bfead080 | 2469 | void wiphy_regulatory_deregister(struct wiphy *wiphy) |
3f2355cb | 2470 | { |
0ad8acaf | 2471 | struct wiphy *request_wiphy = NULL; |
c492db37 | 2472 | struct regulatory_request *lr; |
761cf7ec | 2473 | |
c492db37 | 2474 | lr = get_last_request(); |
abc7381b | 2475 | |
57b5ce07 LR |
2476 | if (!reg_dev_ignore_cell_hint(wiphy)) |
2477 | reg_num_devs_support_basehint--; | |
2478 | ||
458f4f9e JB |
2479 | rcu_free_regdom(get_wiphy_regdom(wiphy)); |
2480 | rcu_assign_pointer(wiphy->regd, NULL); | |
0ef9ccdd | 2481 | |
c492db37 JB |
2482 | if (lr) |
2483 | request_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx); | |
806a9e39 | 2484 | |
0ef9ccdd | 2485 | if (!request_wiphy || request_wiphy != wiphy) |
38fd2143 | 2486 | return; |
0ef9ccdd | 2487 | |
c492db37 JB |
2488 | lr->wiphy_idx = WIPHY_IDX_INVALID; |
2489 | lr->country_ie_env = ENVIRON_ANY; | |
3f2355cb LR |
2490 | } |
2491 | ||
a90c7a31 LR |
2492 | static void reg_timeout_work(struct work_struct *work) |
2493 | { | |
1a919318 | 2494 | REG_DBG_PRINT("Timeout while waiting for CRDA to reply, restoring regulatory settings\n"); |
f77b86d7 | 2495 | rtnl_lock(); |
a90c7a31 | 2496 | restore_regulatory_settings(true); |
f77b86d7 | 2497 | rtnl_unlock(); |
a90c7a31 LR |
2498 | } |
2499 | ||
2fcc9f73 | 2500 | int __init regulatory_init(void) |
b2e1b302 | 2501 | { |
bcf4f99b | 2502 | int err = 0; |
734366de | 2503 | |
b2e1b302 LR |
2504 | reg_pdev = platform_device_register_simple("regulatory", 0, NULL, 0); |
2505 | if (IS_ERR(reg_pdev)) | |
2506 | return PTR_ERR(reg_pdev); | |
734366de | 2507 | |
4d9d88d1 SJR |
2508 | reg_pdev->dev.type = ®_device_type; |
2509 | ||
fe33eb39 | 2510 | spin_lock_init(®_requests_lock); |
e38f8a7a | 2511 | spin_lock_init(®_pending_beacons_lock); |
fe33eb39 | 2512 | |
80007efe LR |
2513 | reg_regdb_size_check(); |
2514 | ||
458f4f9e | 2515 | rcu_assign_pointer(cfg80211_regdomain, cfg80211_world_regdom); |
734366de | 2516 | |
09d989d1 LR |
2517 | user_alpha2[0] = '9'; |
2518 | user_alpha2[1] = '7'; | |
2519 | ||
ae9e4b0d | 2520 | /* We always try to get an update for the static regdomain */ |
458f4f9e | 2521 | err = regulatory_hint_core(cfg80211_world_regdom->alpha2); |
ba25c141 | 2522 | if (err) { |
bcf4f99b LR |
2523 | if (err == -ENOMEM) |
2524 | return err; | |
2525 | /* | |
2526 | * N.B. kobject_uevent_env() can fail mainly for when we're out | |
2527 | * memory which is handled and propagated appropriately above | |
2528 | * but it can also fail during a netlink_broadcast() or during | |
2529 | * early boot for call_usermodehelper(). For now treat these | |
2530 | * errors as non-fatal. | |
2531 | */ | |
e9c0268f | 2532 | pr_err("kobject_uevent_env() was unable to call CRDA during init\n"); |
bcf4f99b | 2533 | } |
734366de | 2534 | |
ae9e4b0d LR |
2535 | /* |
2536 | * Finally, if the user set the module parameter treat it | |
2537 | * as a user hint. | |
2538 | */ | |
2539 | if (!is_world_regdom(ieee80211_regdom)) | |
57b5ce07 LR |
2540 | regulatory_hint_user(ieee80211_regdom, |
2541 | NL80211_USER_REG_HINT_USER); | |
ae9e4b0d | 2542 | |
b2e1b302 LR |
2543 | return 0; |
2544 | } | |
2545 | ||
1a919318 | 2546 | void regulatory_exit(void) |
b2e1b302 | 2547 | { |
fe33eb39 | 2548 | struct regulatory_request *reg_request, *tmp; |
e38f8a7a | 2549 | struct reg_beacon *reg_beacon, *btmp; |
fe33eb39 LR |
2550 | |
2551 | cancel_work_sync(®_work); | |
a90c7a31 | 2552 | cancel_delayed_work_sync(®_timeout); |
fe33eb39 | 2553 | |
9027b149 | 2554 | /* Lock to suppress warnings */ |
38fd2143 | 2555 | rtnl_lock(); |
379b82f4 | 2556 | reset_regdomains(true, NULL); |
38fd2143 | 2557 | rtnl_unlock(); |
734366de | 2558 | |
58ebacc6 | 2559 | dev_set_uevent_suppress(®_pdev->dev, true); |
f6037d09 | 2560 | |
b2e1b302 | 2561 | platform_device_unregister(reg_pdev); |
734366de | 2562 | |
fea9bced JB |
2563 | list_for_each_entry_safe(reg_beacon, btmp, ®_pending_beacons, list) { |
2564 | list_del(®_beacon->list); | |
2565 | kfree(reg_beacon); | |
e38f8a7a | 2566 | } |
e38f8a7a | 2567 | |
fea9bced JB |
2568 | list_for_each_entry_safe(reg_beacon, btmp, ®_beacon_list, list) { |
2569 | list_del(®_beacon->list); | |
2570 | kfree(reg_beacon); | |
e38f8a7a LR |
2571 | } |
2572 | ||
fea9bced JB |
2573 | list_for_each_entry_safe(reg_request, tmp, ®_requests_list, list) { |
2574 | list_del(®_request->list); | |
2575 | kfree(reg_request); | |
fe33eb39 | 2576 | } |
8318d78a | 2577 | } |