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Commit | Line | Data |
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8318d78a JB |
1 | /* |
2 | * Copyright 2002-2005, Instant802 Networks, Inc. | |
3 | * Copyright 2005-2006, Devicescape Software, Inc. | |
4 | * Copyright 2007 Johannes Berg <johannes@sipsolutions.net> | |
3b77d5ec | 5 | * Copyright 2008-2011 Luis R. Rodriguez <mcgrof@qca.qualcomm.com> |
8318d78a | 6 | * |
3b77d5ec LR |
7 | * Permission to use, copy, modify, and/or distribute this software for any |
8 | * purpose with or without fee is hereby granted, provided that the above | |
9 | * copyright notice and this permission notice appear in all copies. | |
10 | * | |
11 | * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES | |
12 | * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF | |
13 | * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR | |
14 | * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES | |
15 | * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN | |
16 | * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF | |
17 | * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. | |
8318d78a JB |
18 | */ |
19 | ||
3b77d5ec | 20 | |
b2e1b302 LR |
21 | /** |
22 | * DOC: Wireless regulatory infrastructure | |
8318d78a JB |
23 | * |
24 | * The usual implementation is for a driver to read a device EEPROM to | |
25 | * determine which regulatory domain it should be operating under, then | |
26 | * looking up the allowable channels in a driver-local table and finally | |
27 | * registering those channels in the wiphy structure. | |
28 | * | |
b2e1b302 LR |
29 | * Another set of compliance enforcement is for drivers to use their |
30 | * own compliance limits which can be stored on the EEPROM. The host | |
31 | * driver or firmware may ensure these are used. | |
32 | * | |
33 | * In addition to all this we provide an extra layer of regulatory | |
34 | * conformance. For drivers which do not have any regulatory | |
35 | * information CRDA provides the complete regulatory solution. | |
36 | * For others it provides a community effort on further restrictions | |
37 | * to enhance compliance. | |
38 | * | |
39 | * Note: When number of rules --> infinity we will not be able to | |
40 | * index on alpha2 any more, instead we'll probably have to | |
41 | * rely on some SHA1 checksum of the regdomain for example. | |
42 | * | |
8318d78a | 43 | */ |
e9c0268f JP |
44 | |
45 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt | |
46 | ||
8318d78a | 47 | #include <linux/kernel.h> |
bc3b2d7f | 48 | #include <linux/export.h> |
5a0e3ad6 | 49 | #include <linux/slab.h> |
b2e1b302 | 50 | #include <linux/list.h> |
c61029c7 | 51 | #include <linux/ctype.h> |
b2e1b302 LR |
52 | #include <linux/nl80211.h> |
53 | #include <linux/platform_device.h> | |
d9b93842 | 54 | #include <linux/moduleparam.h> |
b2e1b302 | 55 | #include <net/cfg80211.h> |
8318d78a | 56 | #include "core.h" |
b2e1b302 | 57 | #include "reg.h" |
3b377ea9 | 58 | #include "regdb.h" |
73d54c9e | 59 | #include "nl80211.h" |
8318d78a | 60 | |
4113f751 | 61 | #ifdef CONFIG_CFG80211_REG_DEBUG |
12c5ffb5 JP |
62 | #define REG_DBG_PRINT(format, args...) \ |
63 | printk(KERN_DEBUG pr_fmt(format), ##args) | |
4113f751 | 64 | #else |
8271195e | 65 | #define REG_DBG_PRINT(args...) |
4113f751 LR |
66 | #endif |
67 | ||
2f92212b JB |
68 | enum reg_request_treatment { |
69 | REG_REQ_OK, | |
70 | REG_REQ_IGNORE, | |
71 | REG_REQ_INTERSECT, | |
72 | REG_REQ_ALREADY_SET, | |
73 | }; | |
74 | ||
a042994d LR |
75 | static struct regulatory_request core_request_world = { |
76 | .initiator = NL80211_REGDOM_SET_BY_CORE, | |
77 | .alpha2[0] = '0', | |
78 | .alpha2[1] = '0', | |
79 | .intersect = false, | |
80 | .processed = true, | |
81 | .country_ie_env = ENVIRON_ANY, | |
82 | }; | |
83 | ||
38fd2143 JB |
84 | /* |
85 | * Receipt of information from last regulatory request, | |
86 | * protected by RTNL (and can be accessed with RCU protection) | |
87 | */ | |
c492db37 JB |
88 | static struct regulatory_request __rcu *last_request = |
89 | (void __rcu *)&core_request_world; | |
734366de | 90 | |
b2e1b302 LR |
91 | /* To trigger userspace events */ |
92 | static struct platform_device *reg_pdev; | |
8318d78a | 93 | |
4d9d88d1 SJR |
94 | static struct device_type reg_device_type = { |
95 | .uevent = reg_device_uevent, | |
96 | }; | |
97 | ||
fb1fc7ad LR |
98 | /* |
99 | * Central wireless core regulatory domains, we only need two, | |
734366de | 100 | * the current one and a world regulatory domain in case we have no |
e8da2bb4 | 101 | * information to give us an alpha2. |
38fd2143 | 102 | * (protected by RTNL, can be read under RCU) |
fb1fc7ad | 103 | */ |
458f4f9e | 104 | const struct ieee80211_regdomain __rcu *cfg80211_regdomain; |
734366de | 105 | |
57b5ce07 LR |
106 | /* |
107 | * Number of devices that registered to the core | |
108 | * that support cellular base station regulatory hints | |
38fd2143 | 109 | * (protected by RTNL) |
57b5ce07 LR |
110 | */ |
111 | static int reg_num_devs_support_basehint; | |
112 | ||
458f4f9e JB |
113 | static const struct ieee80211_regdomain *get_cfg80211_regdom(void) |
114 | { | |
38fd2143 | 115 | return rtnl_dereference(cfg80211_regdomain); |
458f4f9e JB |
116 | } |
117 | ||
118 | static const struct ieee80211_regdomain *get_wiphy_regdom(struct wiphy *wiphy) | |
119 | { | |
38fd2143 | 120 | return rtnl_dereference(wiphy->regd); |
458f4f9e JB |
121 | } |
122 | ||
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 | ||
458f4f9e JB |
138 | static void rcu_free_regdom(const struct ieee80211_regdomain *r) |
139 | { | |
140 | if (!r) | |
141 | return; | |
142 | kfree_rcu((struct ieee80211_regdomain *)r, rcu_head); | |
143 | } | |
144 | ||
c492db37 JB |
145 | static struct regulatory_request *get_last_request(void) |
146 | { | |
38fd2143 | 147 | return rcu_dereference_rtnl(last_request); |
c492db37 JB |
148 | } |
149 | ||
e38f8a7a | 150 | /* Used to queue up regulatory hints */ |
fe33eb39 LR |
151 | static LIST_HEAD(reg_requests_list); |
152 | static spinlock_t reg_requests_lock; | |
153 | ||
e38f8a7a LR |
154 | /* Used to queue up beacon hints for review */ |
155 | static LIST_HEAD(reg_pending_beacons); | |
156 | static spinlock_t reg_pending_beacons_lock; | |
157 | ||
158 | /* Used to keep track of processed beacon hints */ | |
159 | static LIST_HEAD(reg_beacon_list); | |
160 | ||
161 | struct reg_beacon { | |
162 | struct list_head list; | |
163 | struct ieee80211_channel chan; | |
164 | }; | |
165 | ||
f333a7a2 LR |
166 | static void reg_todo(struct work_struct *work); |
167 | static DECLARE_WORK(reg_work, reg_todo); | |
168 | ||
a90c7a31 LR |
169 | static void reg_timeout_work(struct work_struct *work); |
170 | static DECLARE_DELAYED_WORK(reg_timeout, reg_timeout_work); | |
171 | ||
734366de JB |
172 | /* We keep a static world regulatory domain in case of the absence of CRDA */ |
173 | static const struct ieee80211_regdomain world_regdom = { | |
90cdc6df | 174 | .n_reg_rules = 6, |
734366de JB |
175 | .alpha2 = "00", |
176 | .reg_rules = { | |
68798a62 LR |
177 | /* IEEE 802.11b/g, channels 1..11 */ |
178 | REG_RULE(2412-10, 2462+10, 40, 6, 20, 0), | |
43c771a1 JB |
179 | /* IEEE 802.11b/g, channels 12..13. */ |
180 | REG_RULE(2467-10, 2472+10, 40, 6, 20, | |
8fe02e16 | 181 | NL80211_RRF_NO_IR), |
611b6a82 LR |
182 | /* IEEE 802.11 channel 14 - Only JP enables |
183 | * this and for 802.11b only */ | |
184 | REG_RULE(2484-10, 2484+10, 20, 6, 20, | |
8fe02e16 | 185 | NL80211_RRF_NO_IR | |
611b6a82 LR |
186 | NL80211_RRF_NO_OFDM), |
187 | /* IEEE 802.11a, channel 36..48 */ | |
131a19bc | 188 | REG_RULE(5180-10, 5240+10, 160, 6, 20, |
8fe02e16 | 189 | NL80211_RRF_NO_IR), |
3fc71f77 | 190 | |
131a19bc JB |
191 | /* IEEE 802.11a, channel 52..64 - DFS required */ |
192 | REG_RULE(5260-10, 5320+10, 160, 6, 20, | |
8fe02e16 | 193 | NL80211_RRF_NO_IR | |
131a19bc JB |
194 | NL80211_RRF_DFS), |
195 | ||
196 | /* IEEE 802.11a, channel 100..144 - DFS required */ | |
197 | REG_RULE(5500-10, 5720+10, 160, 6, 20, | |
8fe02e16 | 198 | NL80211_RRF_NO_IR | |
131a19bc | 199 | NL80211_RRF_DFS), |
3fc71f77 LR |
200 | |
201 | /* IEEE 802.11a, channel 149..165 */ | |
8ab9d85c | 202 | REG_RULE(5745-10, 5825+10, 80, 6, 20, |
8fe02e16 | 203 | NL80211_RRF_NO_IR), |
90cdc6df VK |
204 | |
205 | /* IEEE 802.11ad (60gHz), channels 1..3 */ | |
206 | REG_RULE(56160+2160*1-1080, 56160+2160*3+1080, 2160, 0, 0, 0), | |
734366de JB |
207 | } |
208 | }; | |
209 | ||
38fd2143 | 210 | /* protected by RTNL */ |
a3d2eaf0 JB |
211 | static const struct ieee80211_regdomain *cfg80211_world_regdom = |
212 | &world_regdom; | |
734366de | 213 | |
6ee7d330 | 214 | static char *ieee80211_regdom = "00"; |
09d989d1 | 215 | static char user_alpha2[2]; |
6ee7d330 | 216 | |
734366de JB |
217 | module_param(ieee80211_regdom, charp, 0444); |
218 | MODULE_PARM_DESC(ieee80211_regdom, "IEEE 802.11 regulatory domain code"); | |
219 | ||
5ad6ef5e LR |
220 | static void reg_kfree_last_request(void) |
221 | { | |
222 | struct regulatory_request *lr; | |
223 | ||
224 | lr = get_last_request(); | |
225 | ||
226 | if (lr != &core_request_world && lr) | |
227 | kfree_rcu(lr, rcu_head); | |
228 | } | |
229 | ||
05f1a3ea LR |
230 | static void reg_update_last_request(struct regulatory_request *request) |
231 | { | |
232 | reg_kfree_last_request(); | |
233 | rcu_assign_pointer(last_request, request); | |
234 | } | |
235 | ||
379b82f4 JB |
236 | static void reset_regdomains(bool full_reset, |
237 | const struct ieee80211_regdomain *new_regdom) | |
734366de | 238 | { |
458f4f9e JB |
239 | const struct ieee80211_regdomain *r; |
240 | ||
38fd2143 | 241 | ASSERT_RTNL(); |
e8da2bb4 | 242 | |
458f4f9e JB |
243 | r = get_cfg80211_regdom(); |
244 | ||
942b25cf | 245 | /* avoid freeing static information or freeing something twice */ |
458f4f9e JB |
246 | if (r == cfg80211_world_regdom) |
247 | r = NULL; | |
942b25cf JB |
248 | if (cfg80211_world_regdom == &world_regdom) |
249 | cfg80211_world_regdom = NULL; | |
458f4f9e JB |
250 | if (r == &world_regdom) |
251 | r = NULL; | |
942b25cf | 252 | |
458f4f9e JB |
253 | rcu_free_regdom(r); |
254 | rcu_free_regdom(cfg80211_world_regdom); | |
734366de | 255 | |
a3d2eaf0 | 256 | cfg80211_world_regdom = &world_regdom; |
458f4f9e | 257 | rcu_assign_pointer(cfg80211_regdomain, new_regdom); |
a042994d LR |
258 | |
259 | if (!full_reset) | |
260 | return; | |
261 | ||
05f1a3ea | 262 | reg_update_last_request(&core_request_world); |
734366de JB |
263 | } |
264 | ||
fb1fc7ad LR |
265 | /* |
266 | * Dynamic world regulatory domain requested by the wireless | |
267 | * core upon initialization | |
268 | */ | |
a3d2eaf0 | 269 | static void update_world_regdomain(const struct ieee80211_regdomain *rd) |
734366de | 270 | { |
c492db37 | 271 | struct regulatory_request *lr; |
734366de | 272 | |
c492db37 JB |
273 | lr = get_last_request(); |
274 | ||
275 | WARN_ON(!lr); | |
734366de | 276 | |
379b82f4 | 277 | reset_regdomains(false, rd); |
734366de JB |
278 | |
279 | cfg80211_world_regdom = rd; | |
734366de | 280 | } |
734366de | 281 | |
a3d2eaf0 | 282 | bool is_world_regdom(const char *alpha2) |
b2e1b302 LR |
283 | { |
284 | if (!alpha2) | |
285 | return false; | |
1a919318 | 286 | return alpha2[0] == '0' && alpha2[1] == '0'; |
b2e1b302 | 287 | } |
8318d78a | 288 | |
a3d2eaf0 | 289 | static bool is_alpha2_set(const char *alpha2) |
b2e1b302 LR |
290 | { |
291 | if (!alpha2) | |
292 | return false; | |
1a919318 | 293 | return alpha2[0] && alpha2[1]; |
b2e1b302 | 294 | } |
8318d78a | 295 | |
a3d2eaf0 | 296 | static bool is_unknown_alpha2(const char *alpha2) |
b2e1b302 LR |
297 | { |
298 | if (!alpha2) | |
299 | return false; | |
fb1fc7ad LR |
300 | /* |
301 | * Special case where regulatory domain was built by driver | |
302 | * but a specific alpha2 cannot be determined | |
303 | */ | |
1a919318 | 304 | return alpha2[0] == '9' && alpha2[1] == '9'; |
b2e1b302 | 305 | } |
8318d78a | 306 | |
3f2355cb LR |
307 | static bool is_intersected_alpha2(const char *alpha2) |
308 | { | |
309 | if (!alpha2) | |
310 | return false; | |
fb1fc7ad LR |
311 | /* |
312 | * Special case where regulatory domain is the | |
3f2355cb | 313 | * result of an intersection between two regulatory domain |
fb1fc7ad LR |
314 | * structures |
315 | */ | |
1a919318 | 316 | return alpha2[0] == '9' && alpha2[1] == '8'; |
3f2355cb LR |
317 | } |
318 | ||
a3d2eaf0 | 319 | static bool is_an_alpha2(const char *alpha2) |
b2e1b302 LR |
320 | { |
321 | if (!alpha2) | |
322 | return false; | |
1a919318 | 323 | return isalpha(alpha2[0]) && isalpha(alpha2[1]); |
b2e1b302 | 324 | } |
8318d78a | 325 | |
a3d2eaf0 | 326 | static bool alpha2_equal(const char *alpha2_x, const char *alpha2_y) |
b2e1b302 LR |
327 | { |
328 | if (!alpha2_x || !alpha2_y) | |
329 | return false; | |
1a919318 | 330 | return alpha2_x[0] == alpha2_y[0] && alpha2_x[1] == alpha2_y[1]; |
b2e1b302 LR |
331 | } |
332 | ||
69b1572b | 333 | static bool regdom_changes(const char *alpha2) |
b2e1b302 | 334 | { |
458f4f9e | 335 | const struct ieee80211_regdomain *r = get_cfg80211_regdom(); |
761cf7ec | 336 | |
458f4f9e | 337 | if (!r) |
b2e1b302 | 338 | return true; |
458f4f9e | 339 | return !alpha2_equal(r->alpha2, alpha2); |
b2e1b302 LR |
340 | } |
341 | ||
09d989d1 LR |
342 | /* |
343 | * The NL80211_REGDOM_SET_BY_USER regdom alpha2 is cached, this lets | |
344 | * you know if a valid regulatory hint with NL80211_REGDOM_SET_BY_USER | |
345 | * has ever been issued. | |
346 | */ | |
347 | static bool is_user_regdom_saved(void) | |
348 | { | |
349 | if (user_alpha2[0] == '9' && user_alpha2[1] == '7') | |
350 | return false; | |
351 | ||
352 | /* This would indicate a mistake on the design */ | |
1a919318 | 353 | if (WARN(!is_world_regdom(user_alpha2) && !is_an_alpha2(user_alpha2), |
09d989d1 | 354 | "Unexpected user alpha2: %c%c\n", |
1a919318 | 355 | user_alpha2[0], user_alpha2[1])) |
09d989d1 LR |
356 | return false; |
357 | ||
358 | return true; | |
359 | } | |
360 | ||
e9763c3c JB |
361 | static const struct ieee80211_regdomain * |
362 | reg_copy_regd(const struct ieee80211_regdomain *src_regd) | |
3b377ea9 JL |
363 | { |
364 | struct ieee80211_regdomain *regd; | |
e9763c3c | 365 | int size_of_regd; |
3b377ea9 JL |
366 | unsigned int i; |
367 | ||
82f20856 JB |
368 | size_of_regd = |
369 | sizeof(struct ieee80211_regdomain) + | |
370 | src_regd->n_reg_rules * sizeof(struct ieee80211_reg_rule); | |
3b377ea9 JL |
371 | |
372 | regd = kzalloc(size_of_regd, GFP_KERNEL); | |
373 | if (!regd) | |
e9763c3c | 374 | return ERR_PTR(-ENOMEM); |
3b377ea9 JL |
375 | |
376 | memcpy(regd, src_regd, sizeof(struct ieee80211_regdomain)); | |
377 | ||
378 | for (i = 0; i < src_regd->n_reg_rules; i++) | |
379 | memcpy(®d->reg_rules[i], &src_regd->reg_rules[i], | |
e9763c3c | 380 | sizeof(struct ieee80211_reg_rule)); |
3b377ea9 | 381 | |
e9763c3c | 382 | return regd; |
3b377ea9 JL |
383 | } |
384 | ||
385 | #ifdef CONFIG_CFG80211_INTERNAL_REGDB | |
386 | struct reg_regdb_search_request { | |
387 | char alpha2[2]; | |
388 | struct list_head list; | |
389 | }; | |
390 | ||
391 | static LIST_HEAD(reg_regdb_search_list); | |
368d06f5 | 392 | static DEFINE_MUTEX(reg_regdb_search_mutex); |
3b377ea9 JL |
393 | |
394 | static void reg_regdb_search(struct work_struct *work) | |
395 | { | |
396 | struct reg_regdb_search_request *request; | |
e9763c3c JB |
397 | const struct ieee80211_regdomain *curdom, *regdom = NULL; |
398 | int i; | |
a85d0d7f | 399 | |
5fe231e8 | 400 | rtnl_lock(); |
3b377ea9 | 401 | |
368d06f5 | 402 | mutex_lock(®_regdb_search_mutex); |
3b377ea9 JL |
403 | while (!list_empty(®_regdb_search_list)) { |
404 | request = list_first_entry(®_regdb_search_list, | |
405 | struct reg_regdb_search_request, | |
406 | list); | |
407 | list_del(&request->list); | |
408 | ||
1a919318 | 409 | for (i = 0; i < reg_regdb_size; i++) { |
3b377ea9 JL |
410 | curdom = reg_regdb[i]; |
411 | ||
1a919318 | 412 | if (alpha2_equal(request->alpha2, curdom->alpha2)) { |
e9763c3c | 413 | regdom = reg_copy_regd(curdom); |
3b377ea9 JL |
414 | break; |
415 | } | |
416 | } | |
417 | ||
418 | kfree(request); | |
419 | } | |
368d06f5 | 420 | mutex_unlock(®_regdb_search_mutex); |
a85d0d7f | 421 | |
e9763c3c | 422 | if (!IS_ERR_OR_NULL(regdom)) |
a85d0d7f LR |
423 | set_regdom(regdom); |
424 | ||
5fe231e8 | 425 | rtnl_unlock(); |
3b377ea9 JL |
426 | } |
427 | ||
428 | static DECLARE_WORK(reg_regdb_work, reg_regdb_search); | |
429 | ||
430 | static void reg_regdb_query(const char *alpha2) | |
431 | { | |
432 | struct reg_regdb_search_request *request; | |
433 | ||
434 | if (!alpha2) | |
435 | return; | |
436 | ||
437 | request = kzalloc(sizeof(struct reg_regdb_search_request), GFP_KERNEL); | |
438 | if (!request) | |
439 | return; | |
440 | ||
441 | memcpy(request->alpha2, alpha2, 2); | |
442 | ||
368d06f5 | 443 | mutex_lock(®_regdb_search_mutex); |
3b377ea9 | 444 | list_add_tail(&request->list, ®_regdb_search_list); |
368d06f5 | 445 | mutex_unlock(®_regdb_search_mutex); |
3b377ea9 JL |
446 | |
447 | schedule_work(®_regdb_work); | |
448 | } | |
80007efe LR |
449 | |
450 | /* Feel free to add any other sanity checks here */ | |
451 | static void reg_regdb_size_check(void) | |
452 | { | |
453 | /* We should ideally BUILD_BUG_ON() but then random builds would fail */ | |
454 | WARN_ONCE(!reg_regdb_size, "db.txt is empty, you should update it..."); | |
455 | } | |
3b377ea9 | 456 | #else |
80007efe | 457 | static inline void reg_regdb_size_check(void) {} |
3b377ea9 JL |
458 | static inline void reg_regdb_query(const char *alpha2) {} |
459 | #endif /* CONFIG_CFG80211_INTERNAL_REGDB */ | |
460 | ||
fb1fc7ad LR |
461 | /* |
462 | * This lets us keep regulatory code which is updated on a regulatory | |
4d9d88d1 SJR |
463 | * basis in userspace. Country information is filled in by |
464 | * reg_device_uevent | |
fb1fc7ad | 465 | */ |
b2e1b302 LR |
466 | static int call_crda(const char *alpha2) |
467 | { | |
b2e1b302 | 468 | if (!is_world_regdom((char *) alpha2)) |
e9c0268f | 469 | pr_info("Calling CRDA for country: %c%c\n", |
b2e1b302 LR |
470 | alpha2[0], alpha2[1]); |
471 | else | |
e9c0268f | 472 | pr_info("Calling CRDA to update world regulatory domain\n"); |
b2e1b302 | 473 | |
3b377ea9 JL |
474 | /* query internal regulatory database (if it exists) */ |
475 | reg_regdb_query(alpha2); | |
476 | ||
4d9d88d1 | 477 | return kobject_uevent(®_pdev->dev.kobj, KOBJ_CHANGE); |
b2e1b302 LR |
478 | } |
479 | ||
fe6631ff LR |
480 | static enum reg_request_treatment |
481 | reg_call_crda(struct regulatory_request *request) | |
482 | { | |
483 | if (call_crda(request->alpha2)) | |
484 | return REG_REQ_IGNORE; | |
485 | return REG_REQ_OK; | |
486 | } | |
487 | ||
e438768f | 488 | bool reg_is_valid_request(const char *alpha2) |
b2e1b302 | 489 | { |
c492db37 | 490 | struct regulatory_request *lr = get_last_request(); |
61405e97 | 491 | |
c492db37 | 492 | if (!lr || lr->processed) |
f6037d09 JB |
493 | return false; |
494 | ||
c492db37 | 495 | return alpha2_equal(lr->alpha2, alpha2); |
b2e1b302 | 496 | } |
8318d78a | 497 | |
b2e1b302 | 498 | /* Sanity check on a regulatory rule */ |
a3d2eaf0 | 499 | static bool is_valid_reg_rule(const struct ieee80211_reg_rule *rule) |
8318d78a | 500 | { |
a3d2eaf0 | 501 | const struct ieee80211_freq_range *freq_range = &rule->freq_range; |
b2e1b302 LR |
502 | u32 freq_diff; |
503 | ||
91e99004 | 504 | if (freq_range->start_freq_khz <= 0 || freq_range->end_freq_khz <= 0) |
b2e1b302 LR |
505 | return false; |
506 | ||
507 | if (freq_range->start_freq_khz > freq_range->end_freq_khz) | |
508 | return false; | |
509 | ||
510 | freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz; | |
511 | ||
bd05f28e | 512 | if (freq_range->end_freq_khz <= freq_range->start_freq_khz || |
1a919318 | 513 | freq_range->max_bandwidth_khz > freq_diff) |
b2e1b302 LR |
514 | return false; |
515 | ||
516 | return true; | |
517 | } | |
518 | ||
a3d2eaf0 | 519 | static bool is_valid_rd(const struct ieee80211_regdomain *rd) |
b2e1b302 | 520 | { |
a3d2eaf0 | 521 | const struct ieee80211_reg_rule *reg_rule = NULL; |
b2e1b302 | 522 | unsigned int i; |
8318d78a | 523 | |
b2e1b302 LR |
524 | if (!rd->n_reg_rules) |
525 | return false; | |
8318d78a | 526 | |
88dc1c3f LR |
527 | if (WARN_ON(rd->n_reg_rules > NL80211_MAX_SUPP_REG_RULES)) |
528 | return false; | |
529 | ||
b2e1b302 LR |
530 | for (i = 0; i < rd->n_reg_rules; i++) { |
531 | reg_rule = &rd->reg_rules[i]; | |
532 | if (!is_valid_reg_rule(reg_rule)) | |
533 | return false; | |
534 | } | |
535 | ||
536 | return true; | |
8318d78a JB |
537 | } |
538 | ||
038659e7 | 539 | static bool reg_does_bw_fit(const struct ieee80211_freq_range *freq_range, |
fe7ef5e9 | 540 | u32 center_freq_khz, u32 bw_khz) |
b2e1b302 | 541 | { |
038659e7 LR |
542 | u32 start_freq_khz, end_freq_khz; |
543 | ||
544 | start_freq_khz = center_freq_khz - (bw_khz/2); | |
545 | end_freq_khz = center_freq_khz + (bw_khz/2); | |
546 | ||
547 | if (start_freq_khz >= freq_range->start_freq_khz && | |
548 | end_freq_khz <= freq_range->end_freq_khz) | |
549 | return true; | |
550 | ||
551 | return false; | |
b2e1b302 | 552 | } |
8318d78a | 553 | |
0c7dc45d LR |
554 | /** |
555 | * freq_in_rule_band - tells us if a frequency is in a frequency band | |
556 | * @freq_range: frequency rule we want to query | |
557 | * @freq_khz: frequency we are inquiring about | |
558 | * | |
559 | * This lets us know if a specific frequency rule is or is not relevant to | |
560 | * a specific frequency's band. Bands are device specific and artificial | |
64629b9d VK |
561 | * definitions (the "2.4 GHz band", the "5 GHz band" and the "60GHz band"), |
562 | * however it is safe for now to assume that a frequency rule should not be | |
563 | * part of a frequency's band if the start freq or end freq are off by more | |
564 | * than 2 GHz for the 2.4 and 5 GHz bands, and by more than 10 GHz for the | |
565 | * 60 GHz band. | |
0c7dc45d LR |
566 | * This resolution can be lowered and should be considered as we add |
567 | * regulatory rule support for other "bands". | |
568 | **/ | |
569 | static bool freq_in_rule_band(const struct ieee80211_freq_range *freq_range, | |
1a919318 | 570 | u32 freq_khz) |
0c7dc45d LR |
571 | { |
572 | #define ONE_GHZ_IN_KHZ 1000000 | |
64629b9d VK |
573 | /* |
574 | * From 802.11ad: directional multi-gigabit (DMG): | |
575 | * Pertaining to operation in a frequency band containing a channel | |
576 | * with the Channel starting frequency above 45 GHz. | |
577 | */ | |
578 | u32 limit = freq_khz > 45 * ONE_GHZ_IN_KHZ ? | |
579 | 10 * ONE_GHZ_IN_KHZ : 2 * ONE_GHZ_IN_KHZ; | |
580 | if (abs(freq_khz - freq_range->start_freq_khz) <= limit) | |
0c7dc45d | 581 | return true; |
64629b9d | 582 | if (abs(freq_khz - freq_range->end_freq_khz) <= limit) |
0c7dc45d LR |
583 | return true; |
584 | return false; | |
585 | #undef ONE_GHZ_IN_KHZ | |
586 | } | |
587 | ||
adbfb058 LR |
588 | /* |
589 | * Later on we can perhaps use the more restrictive DFS | |
590 | * region but we don't have information for that yet so | |
591 | * for now simply disallow conflicts. | |
592 | */ | |
593 | static enum nl80211_dfs_regions | |
594 | reg_intersect_dfs_region(const enum nl80211_dfs_regions dfs_region1, | |
595 | const enum nl80211_dfs_regions dfs_region2) | |
596 | { | |
597 | if (dfs_region1 != dfs_region2) | |
598 | return NL80211_DFS_UNSET; | |
599 | return dfs_region1; | |
600 | } | |
601 | ||
fb1fc7ad LR |
602 | /* |
603 | * Helper for regdom_intersect(), this does the real | |
604 | * mathematical intersection fun | |
605 | */ | |
1a919318 JB |
606 | static int reg_rules_intersect(const struct ieee80211_reg_rule *rule1, |
607 | const struct ieee80211_reg_rule *rule2, | |
608 | struct ieee80211_reg_rule *intersected_rule) | |
9c96477d LR |
609 | { |
610 | const struct ieee80211_freq_range *freq_range1, *freq_range2; | |
611 | struct ieee80211_freq_range *freq_range; | |
612 | const struct ieee80211_power_rule *power_rule1, *power_rule2; | |
613 | struct ieee80211_power_rule *power_rule; | |
614 | u32 freq_diff; | |
615 | ||
616 | freq_range1 = &rule1->freq_range; | |
617 | freq_range2 = &rule2->freq_range; | |
618 | freq_range = &intersected_rule->freq_range; | |
619 | ||
620 | power_rule1 = &rule1->power_rule; | |
621 | power_rule2 = &rule2->power_rule; | |
622 | power_rule = &intersected_rule->power_rule; | |
623 | ||
624 | freq_range->start_freq_khz = max(freq_range1->start_freq_khz, | |
1a919318 | 625 | freq_range2->start_freq_khz); |
9c96477d | 626 | freq_range->end_freq_khz = min(freq_range1->end_freq_khz, |
1a919318 | 627 | freq_range2->end_freq_khz); |
9c96477d | 628 | freq_range->max_bandwidth_khz = min(freq_range1->max_bandwidth_khz, |
1a919318 | 629 | freq_range2->max_bandwidth_khz); |
9c96477d LR |
630 | |
631 | freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz; | |
632 | if (freq_range->max_bandwidth_khz > freq_diff) | |
633 | freq_range->max_bandwidth_khz = freq_diff; | |
634 | ||
635 | power_rule->max_eirp = min(power_rule1->max_eirp, | |
636 | power_rule2->max_eirp); | |
637 | power_rule->max_antenna_gain = min(power_rule1->max_antenna_gain, | |
638 | power_rule2->max_antenna_gain); | |
639 | ||
1a919318 | 640 | intersected_rule->flags = rule1->flags | rule2->flags; |
9c96477d LR |
641 | |
642 | if (!is_valid_reg_rule(intersected_rule)) | |
643 | return -EINVAL; | |
644 | ||
645 | return 0; | |
646 | } | |
647 | ||
648 | /** | |
649 | * regdom_intersect - do the intersection between two regulatory domains | |
650 | * @rd1: first regulatory domain | |
651 | * @rd2: second regulatory domain | |
652 | * | |
653 | * Use this function to get the intersection between two regulatory domains. | |
654 | * Once completed we will mark the alpha2 for the rd as intersected, "98", | |
655 | * as no one single alpha2 can represent this regulatory domain. | |
656 | * | |
657 | * Returns a pointer to the regulatory domain structure which will hold the | |
658 | * resulting intersection of rules between rd1 and rd2. We will | |
659 | * kzalloc() this structure for you. | |
660 | */ | |
1a919318 JB |
661 | static struct ieee80211_regdomain * |
662 | regdom_intersect(const struct ieee80211_regdomain *rd1, | |
663 | const struct ieee80211_regdomain *rd2) | |
9c96477d LR |
664 | { |
665 | int r, size_of_regd; | |
666 | unsigned int x, y; | |
667 | unsigned int num_rules = 0, rule_idx = 0; | |
668 | const struct ieee80211_reg_rule *rule1, *rule2; | |
669 | struct ieee80211_reg_rule *intersected_rule; | |
670 | struct ieee80211_regdomain *rd; | |
671 | /* This is just a dummy holder to help us count */ | |
74f53cd8 | 672 | struct ieee80211_reg_rule dummy_rule; |
9c96477d LR |
673 | |
674 | if (!rd1 || !rd2) | |
675 | return NULL; | |
676 | ||
fb1fc7ad LR |
677 | /* |
678 | * First we get a count of the rules we'll need, then we actually | |
9c96477d LR |
679 | * build them. This is to so we can malloc() and free() a |
680 | * regdomain once. The reason we use reg_rules_intersect() here | |
681 | * is it will return -EINVAL if the rule computed makes no sense. | |
fb1fc7ad LR |
682 | * All rules that do check out OK are valid. |
683 | */ | |
9c96477d LR |
684 | |
685 | for (x = 0; x < rd1->n_reg_rules; x++) { | |
686 | rule1 = &rd1->reg_rules[x]; | |
687 | for (y = 0; y < rd2->n_reg_rules; y++) { | |
688 | rule2 = &rd2->reg_rules[y]; | |
74f53cd8 | 689 | if (!reg_rules_intersect(rule1, rule2, &dummy_rule)) |
9c96477d | 690 | num_rules++; |
9c96477d LR |
691 | } |
692 | } | |
693 | ||
694 | if (!num_rules) | |
695 | return NULL; | |
696 | ||
697 | size_of_regd = sizeof(struct ieee80211_regdomain) + | |
82f20856 | 698 | num_rules * sizeof(struct ieee80211_reg_rule); |
9c96477d LR |
699 | |
700 | rd = kzalloc(size_of_regd, GFP_KERNEL); | |
701 | if (!rd) | |
702 | return NULL; | |
703 | ||
8a57fff0 | 704 | for (x = 0; x < rd1->n_reg_rules && rule_idx < num_rules; x++) { |
9c96477d | 705 | rule1 = &rd1->reg_rules[x]; |
8a57fff0 | 706 | for (y = 0; y < rd2->n_reg_rules && rule_idx < num_rules; y++) { |
9c96477d | 707 | rule2 = &rd2->reg_rules[y]; |
fb1fc7ad LR |
708 | /* |
709 | * This time around instead of using the stack lets | |
9c96477d | 710 | * write to the target rule directly saving ourselves |
fb1fc7ad LR |
711 | * a memcpy() |
712 | */ | |
9c96477d | 713 | intersected_rule = &rd->reg_rules[rule_idx]; |
1a919318 | 714 | r = reg_rules_intersect(rule1, rule2, intersected_rule); |
fb1fc7ad LR |
715 | /* |
716 | * No need to memset here the intersected rule here as | |
717 | * we're not using the stack anymore | |
718 | */ | |
9c96477d LR |
719 | if (r) |
720 | continue; | |
721 | rule_idx++; | |
722 | } | |
723 | } | |
724 | ||
725 | if (rule_idx != num_rules) { | |
726 | kfree(rd); | |
727 | return NULL; | |
728 | } | |
729 | ||
730 | rd->n_reg_rules = num_rules; | |
731 | rd->alpha2[0] = '9'; | |
732 | rd->alpha2[1] = '8'; | |
adbfb058 LR |
733 | rd->dfs_region = reg_intersect_dfs_region(rd1->dfs_region, |
734 | rd2->dfs_region); | |
9c96477d LR |
735 | |
736 | return rd; | |
737 | } | |
738 | ||
fb1fc7ad LR |
739 | /* |
740 | * XXX: add support for the rest of enum nl80211_reg_rule_flags, we may | |
741 | * want to just have the channel structure use these | |
742 | */ | |
b2e1b302 LR |
743 | static u32 map_regdom_flags(u32 rd_flags) |
744 | { | |
745 | u32 channel_flags = 0; | |
8fe02e16 LR |
746 | if (rd_flags & NL80211_RRF_NO_IR_ALL) |
747 | channel_flags |= IEEE80211_CHAN_NO_IR; | |
b2e1b302 LR |
748 | if (rd_flags & NL80211_RRF_DFS) |
749 | channel_flags |= IEEE80211_CHAN_RADAR; | |
03f6b084 SF |
750 | if (rd_flags & NL80211_RRF_NO_OFDM) |
751 | channel_flags |= IEEE80211_CHAN_NO_OFDM; | |
b2e1b302 LR |
752 | return channel_flags; |
753 | } | |
754 | ||
361c9c8b JB |
755 | static const struct ieee80211_reg_rule * |
756 | freq_reg_info_regd(struct wiphy *wiphy, u32 center_freq, | |
757 | const struct ieee80211_regdomain *regd) | |
8318d78a JB |
758 | { |
759 | int i; | |
0c7dc45d | 760 | bool band_rule_found = false; |
038659e7 LR |
761 | bool bw_fits = false; |
762 | ||
3e0c3ff3 | 763 | if (!regd) |
361c9c8b | 764 | return ERR_PTR(-EINVAL); |
b2e1b302 | 765 | |
3e0c3ff3 | 766 | for (i = 0; i < regd->n_reg_rules; i++) { |
b2e1b302 LR |
767 | const struct ieee80211_reg_rule *rr; |
768 | const struct ieee80211_freq_range *fr = NULL; | |
b2e1b302 | 769 | |
3e0c3ff3 | 770 | rr = ®d->reg_rules[i]; |
b2e1b302 | 771 | fr = &rr->freq_range; |
0c7dc45d | 772 | |
fb1fc7ad LR |
773 | /* |
774 | * We only need to know if one frequency rule was | |
0c7dc45d | 775 | * was in center_freq's band, that's enough, so lets |
fb1fc7ad LR |
776 | * not overwrite it once found |
777 | */ | |
0c7dc45d LR |
778 | if (!band_rule_found) |
779 | band_rule_found = freq_in_rule_band(fr, center_freq); | |
780 | ||
fe7ef5e9 | 781 | bw_fits = reg_does_bw_fit(fr, center_freq, MHZ_TO_KHZ(20)); |
0c7dc45d | 782 | |
361c9c8b JB |
783 | if (band_rule_found && bw_fits) |
784 | return rr; | |
8318d78a JB |
785 | } |
786 | ||
0c7dc45d | 787 | if (!band_rule_found) |
361c9c8b | 788 | return ERR_PTR(-ERANGE); |
0c7dc45d | 789 | |
361c9c8b | 790 | return ERR_PTR(-EINVAL); |
b2e1b302 LR |
791 | } |
792 | ||
361c9c8b JB |
793 | const struct ieee80211_reg_rule *freq_reg_info(struct wiphy *wiphy, |
794 | u32 center_freq) | |
1fa25e41 | 795 | { |
5d885b99 | 796 | const struct ieee80211_regdomain *regd; |
c492db37 | 797 | struct regulatory_request *lr = get_last_request(); |
1a919318 | 798 | |
5d885b99 JB |
799 | /* |
800 | * Follow the driver's regulatory domain, if present, unless a country | |
801 | * IE has been processed or a user wants to help complaince further | |
802 | */ | |
c492db37 JB |
803 | if (lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && |
804 | lr->initiator != NL80211_REGDOM_SET_BY_USER && | |
5d885b99 | 805 | wiphy->regd) |
458f4f9e | 806 | regd = get_wiphy_regdom(wiphy); |
5d885b99 | 807 | else |
458f4f9e | 808 | regd = get_cfg80211_regdom(); |
5d885b99 | 809 | |
361c9c8b | 810 | return freq_reg_info_regd(wiphy, center_freq, regd); |
1fa25e41 | 811 | } |
4f366c5d | 812 | EXPORT_SYMBOL(freq_reg_info); |
b2e1b302 | 813 | |
034c6d6e | 814 | const char *reg_initiator_name(enum nl80211_reg_initiator initiator) |
926a0a09 LR |
815 | { |
816 | switch (initiator) { | |
817 | case NL80211_REGDOM_SET_BY_CORE: | |
034c6d6e | 818 | return "core"; |
926a0a09 | 819 | case NL80211_REGDOM_SET_BY_USER: |
034c6d6e | 820 | return "user"; |
926a0a09 | 821 | case NL80211_REGDOM_SET_BY_DRIVER: |
034c6d6e | 822 | return "driver"; |
926a0a09 | 823 | case NL80211_REGDOM_SET_BY_COUNTRY_IE: |
034c6d6e | 824 | return "country IE"; |
926a0a09 LR |
825 | default: |
826 | WARN_ON(1); | |
034c6d6e | 827 | return "bug"; |
926a0a09 LR |
828 | } |
829 | } | |
034c6d6e | 830 | EXPORT_SYMBOL(reg_initiator_name); |
e702d3cf | 831 | |
034c6d6e | 832 | #ifdef CONFIG_CFG80211_REG_DEBUG |
e702d3cf | 833 | static void chan_reg_rule_print_dbg(struct ieee80211_channel *chan, |
e702d3cf LR |
834 | const struct ieee80211_reg_rule *reg_rule) |
835 | { | |
836 | const struct ieee80211_power_rule *power_rule; | |
837 | const struct ieee80211_freq_range *freq_range; | |
838 | char max_antenna_gain[32]; | |
839 | ||
840 | power_rule = ®_rule->power_rule; | |
841 | freq_range = ®_rule->freq_range; | |
842 | ||
843 | if (!power_rule->max_antenna_gain) | |
844 | snprintf(max_antenna_gain, 32, "N/A"); | |
845 | else | |
846 | snprintf(max_antenna_gain, 32, "%d", power_rule->max_antenna_gain); | |
847 | ||
fe7ef5e9 JB |
848 | REG_DBG_PRINT("Updating information on frequency %d MHz with regulatory rule:\n", |
849 | chan->center_freq); | |
e702d3cf | 850 | |
56e6786e | 851 | REG_DBG_PRINT("%d KHz - %d KHz @ %d KHz), (%s mBi, %d mBm)\n", |
1a919318 JB |
852 | freq_range->start_freq_khz, freq_range->end_freq_khz, |
853 | freq_range->max_bandwidth_khz, max_antenna_gain, | |
e702d3cf LR |
854 | power_rule->max_eirp); |
855 | } | |
856 | #else | |
857 | static void chan_reg_rule_print_dbg(struct ieee80211_channel *chan, | |
e702d3cf LR |
858 | const struct ieee80211_reg_rule *reg_rule) |
859 | { | |
860 | return; | |
861 | } | |
926a0a09 LR |
862 | #endif |
863 | ||
038659e7 LR |
864 | /* |
865 | * Note that right now we assume the desired channel bandwidth | |
866 | * is always 20 MHz for each individual channel (HT40 uses 20 MHz | |
fe7ef5e9 | 867 | * per channel, the primary and the extension channel). |
038659e7 | 868 | */ |
7ca43d03 LR |
869 | static void handle_channel(struct wiphy *wiphy, |
870 | enum nl80211_reg_initiator initiator, | |
fdc9d7b2 | 871 | struct ieee80211_channel *chan) |
b2e1b302 | 872 | { |
038659e7 | 873 | u32 flags, bw_flags = 0; |
b2e1b302 LR |
874 | const struct ieee80211_reg_rule *reg_rule = NULL; |
875 | const struct ieee80211_power_rule *power_rule = NULL; | |
038659e7 | 876 | const struct ieee80211_freq_range *freq_range = NULL; |
fe33eb39 | 877 | struct wiphy *request_wiphy = NULL; |
c492db37 | 878 | struct regulatory_request *lr = get_last_request(); |
a92a3ce7 | 879 | |
c492db37 | 880 | request_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx); |
a92a3ce7 LR |
881 | |
882 | flags = chan->orig_flags; | |
b2e1b302 | 883 | |
361c9c8b JB |
884 | reg_rule = freq_reg_info(wiphy, MHZ_TO_KHZ(chan->center_freq)); |
885 | if (IS_ERR(reg_rule)) { | |
ca4ffe8f LR |
886 | /* |
887 | * We will disable all channels that do not match our | |
25985edc | 888 | * received regulatory rule unless the hint is coming |
ca4ffe8f LR |
889 | * from a Country IE and the Country IE had no information |
890 | * about a band. The IEEE 802.11 spec allows for an AP | |
891 | * to send only a subset of the regulatory rules allowed, | |
892 | * so an AP in the US that only supports 2.4 GHz may only send | |
893 | * a country IE with information for the 2.4 GHz band | |
894 | * while 5 GHz is still supported. | |
895 | */ | |
896 | if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE && | |
361c9c8b | 897 | PTR_ERR(reg_rule) == -ERANGE) |
ca4ffe8f LR |
898 | return; |
899 | ||
cc493e4f LR |
900 | if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER && |
901 | request_wiphy && request_wiphy == wiphy && | |
a2f73b6c | 902 | request_wiphy->regulatory_flags & REGULATORY_STRICT_REG) { |
cc493e4f LR |
903 | REG_DBG_PRINT("Disabling freq %d MHz for good\n", |
904 | chan->center_freq); | |
905 | chan->orig_flags |= IEEE80211_CHAN_DISABLED; | |
906 | chan->flags = chan->orig_flags; | |
907 | } else { | |
908 | REG_DBG_PRINT("Disabling freq %d MHz\n", | |
909 | chan->center_freq); | |
910 | chan->flags |= IEEE80211_CHAN_DISABLED; | |
911 | } | |
8318d78a | 912 | return; |
ca4ffe8f | 913 | } |
8318d78a | 914 | |
fe7ef5e9 | 915 | chan_reg_rule_print_dbg(chan, reg_rule); |
e702d3cf | 916 | |
b2e1b302 | 917 | power_rule = ®_rule->power_rule; |
038659e7 LR |
918 | freq_range = ®_rule->freq_range; |
919 | ||
920 | if (freq_range->max_bandwidth_khz < MHZ_TO_KHZ(40)) | |
921 | bw_flags = IEEE80211_CHAN_NO_HT40; | |
c7a6ee27 JB |
922 | if (freq_range->max_bandwidth_khz < MHZ_TO_KHZ(80)) |
923 | bw_flags |= IEEE80211_CHAN_NO_80MHZ; | |
924 | if (freq_range->max_bandwidth_khz < MHZ_TO_KHZ(160)) | |
925 | bw_flags |= IEEE80211_CHAN_NO_160MHZ; | |
b2e1b302 | 926 | |
c492db37 | 927 | if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER && |
806a9e39 | 928 | request_wiphy && request_wiphy == wiphy && |
a2f73b6c | 929 | request_wiphy->regulatory_flags & REGULATORY_STRICT_REG) { |
fb1fc7ad | 930 | /* |
25985edc | 931 | * This guarantees the driver's requested regulatory domain |
f976376d | 932 | * will always be used as a base for further regulatory |
fb1fc7ad LR |
933 | * settings |
934 | */ | |
f976376d | 935 | chan->flags = chan->orig_flags = |
038659e7 | 936 | map_regdom_flags(reg_rule->flags) | bw_flags; |
f976376d LR |
937 | chan->max_antenna_gain = chan->orig_mag = |
938 | (int) MBI_TO_DBI(power_rule->max_antenna_gain); | |
279f0f55 | 939 | chan->max_reg_power = chan->max_power = chan->orig_mpwr = |
f976376d LR |
940 | (int) MBM_TO_DBM(power_rule->max_eirp); |
941 | return; | |
942 | } | |
943 | ||
04f39047 SW |
944 | chan->dfs_state = NL80211_DFS_USABLE; |
945 | chan->dfs_state_entered = jiffies; | |
946 | ||
aa3d7eef | 947 | chan->beacon_found = false; |
038659e7 | 948 | chan->flags = flags | bw_flags | map_regdom_flags(reg_rule->flags); |
1a919318 JB |
949 | chan->max_antenna_gain = |
950 | min_t(int, chan->orig_mag, | |
951 | MBI_TO_DBI(power_rule->max_antenna_gain)); | |
eccc068e | 952 | chan->max_reg_power = (int) MBM_TO_DBM(power_rule->max_eirp); |
5e31fc08 SG |
953 | if (chan->orig_mpwr) { |
954 | /* | |
a09a85a0 LR |
955 | * Devices that use REGULATORY_COUNTRY_IE_FOLLOW_POWER |
956 | * will always follow the passed country IE power settings. | |
5e31fc08 SG |
957 | */ |
958 | if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE && | |
a09a85a0 | 959 | wiphy->regulatory_flags & REGULATORY_COUNTRY_IE_FOLLOW_POWER) |
5e31fc08 SG |
960 | chan->max_power = chan->max_reg_power; |
961 | else | |
962 | chan->max_power = min(chan->orig_mpwr, | |
963 | chan->max_reg_power); | |
964 | } else | |
965 | chan->max_power = chan->max_reg_power; | |
8318d78a JB |
966 | } |
967 | ||
7ca43d03 | 968 | static void handle_band(struct wiphy *wiphy, |
fdc9d7b2 JB |
969 | enum nl80211_reg_initiator initiator, |
970 | struct ieee80211_supported_band *sband) | |
8318d78a | 971 | { |
a92a3ce7 | 972 | unsigned int i; |
a92a3ce7 | 973 | |
fdc9d7b2 JB |
974 | if (!sband) |
975 | return; | |
8318d78a JB |
976 | |
977 | for (i = 0; i < sband->n_channels; i++) | |
fdc9d7b2 | 978 | handle_channel(wiphy, initiator, &sband->channels[i]); |
8318d78a JB |
979 | } |
980 | ||
57b5ce07 LR |
981 | static bool reg_request_cell_base(struct regulatory_request *request) |
982 | { | |
983 | if (request->initiator != NL80211_REGDOM_SET_BY_USER) | |
984 | return false; | |
1a919318 | 985 | return request->user_reg_hint_type == NL80211_USER_REG_HINT_CELL_BASE; |
57b5ce07 LR |
986 | } |
987 | ||
988 | bool reg_last_request_cell_base(void) | |
989 | { | |
38fd2143 | 990 | return reg_request_cell_base(get_last_request()); |
57b5ce07 LR |
991 | } |
992 | ||
993 | #ifdef CONFIG_CFG80211_CERTIFICATION_ONUS | |
57b5ce07 | 994 | /* Core specific check */ |
2f92212b JB |
995 | static enum reg_request_treatment |
996 | reg_ignore_cell_hint(struct regulatory_request *pending_request) | |
57b5ce07 | 997 | { |
c492db37 JB |
998 | struct regulatory_request *lr = get_last_request(); |
999 | ||
57b5ce07 | 1000 | if (!reg_num_devs_support_basehint) |
2f92212b | 1001 | return REG_REQ_IGNORE; |
57b5ce07 | 1002 | |
c492db37 | 1003 | if (reg_request_cell_base(lr) && |
1a919318 | 1004 | !regdom_changes(pending_request->alpha2)) |
2f92212b | 1005 | return REG_REQ_ALREADY_SET; |
1a919318 | 1006 | |
2f92212b | 1007 | return REG_REQ_OK; |
57b5ce07 LR |
1008 | } |
1009 | ||
1010 | /* Device specific check */ | |
1011 | static bool reg_dev_ignore_cell_hint(struct wiphy *wiphy) | |
1012 | { | |
1a919318 | 1013 | return !(wiphy->features & NL80211_FEATURE_CELL_BASE_REG_HINTS); |
57b5ce07 LR |
1014 | } |
1015 | #else | |
1016 | static int reg_ignore_cell_hint(struct regulatory_request *pending_request) | |
1017 | { | |
2f92212b | 1018 | return REG_REQ_IGNORE; |
57b5ce07 | 1019 | } |
1a919318 JB |
1020 | |
1021 | static bool reg_dev_ignore_cell_hint(struct wiphy *wiphy) | |
57b5ce07 LR |
1022 | { |
1023 | return true; | |
1024 | } | |
1025 | #endif | |
1026 | ||
fa1fb9cb LR |
1027 | static bool wiphy_strict_alpha2_regd(struct wiphy *wiphy) |
1028 | { | |
a2f73b6c LR |
1029 | if (wiphy->regulatory_flags & REGULATORY_STRICT_REG && |
1030 | !(wiphy->regulatory_flags & REGULATORY_CUSTOM_REG)) | |
fa1fb9cb LR |
1031 | return true; |
1032 | return false; | |
1033 | } | |
57b5ce07 | 1034 | |
7db90f4a LR |
1035 | static bool ignore_reg_update(struct wiphy *wiphy, |
1036 | enum nl80211_reg_initiator initiator) | |
14b9815a | 1037 | { |
c492db37 JB |
1038 | struct regulatory_request *lr = get_last_request(); |
1039 | ||
1040 | if (!lr) { | |
034c6d6e LR |
1041 | REG_DBG_PRINT("Ignoring regulatory request set by %s " |
1042 | "since last_request is not set\n", | |
926a0a09 | 1043 | reg_initiator_name(initiator)); |
14b9815a | 1044 | return true; |
926a0a09 LR |
1045 | } |
1046 | ||
7db90f4a | 1047 | if (initiator == NL80211_REGDOM_SET_BY_CORE && |
a2f73b6c | 1048 | wiphy->regulatory_flags & REGULATORY_CUSTOM_REG) { |
034c6d6e LR |
1049 | REG_DBG_PRINT("Ignoring regulatory request set by %s " |
1050 | "since the driver uses its own custom " | |
1051 | "regulatory domain\n", | |
926a0a09 | 1052 | reg_initiator_name(initiator)); |
14b9815a | 1053 | return true; |
926a0a09 LR |
1054 | } |
1055 | ||
fb1fc7ad LR |
1056 | /* |
1057 | * wiphy->regd will be set once the device has its own | |
1058 | * desired regulatory domain set | |
1059 | */ | |
fa1fb9cb | 1060 | if (wiphy_strict_alpha2_regd(wiphy) && !wiphy->regd && |
749b527b | 1061 | initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && |
c492db37 | 1062 | !is_world_regdom(lr->alpha2)) { |
034c6d6e LR |
1063 | REG_DBG_PRINT("Ignoring regulatory request set by %s " |
1064 | "since the driver requires its own regulatory " | |
1065 | "domain to be set first\n", | |
926a0a09 | 1066 | reg_initiator_name(initiator)); |
14b9815a | 1067 | return true; |
926a0a09 LR |
1068 | } |
1069 | ||
c492db37 | 1070 | if (reg_request_cell_base(lr)) |
57b5ce07 LR |
1071 | return reg_dev_ignore_cell_hint(wiphy); |
1072 | ||
14b9815a LR |
1073 | return false; |
1074 | } | |
1075 | ||
3195e489 LR |
1076 | static bool reg_is_world_roaming(struct wiphy *wiphy) |
1077 | { | |
1078 | const struct ieee80211_regdomain *cr = get_cfg80211_regdom(); | |
1079 | const struct ieee80211_regdomain *wr = get_wiphy_regdom(wiphy); | |
1080 | struct regulatory_request *lr = get_last_request(); | |
1081 | ||
1082 | if (is_world_regdom(cr->alpha2) || (wr && is_world_regdom(wr->alpha2))) | |
1083 | return true; | |
1084 | ||
1085 | if (lr && lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && | |
a2f73b6c | 1086 | wiphy->regulatory_flags & REGULATORY_CUSTOM_REG) |
3195e489 LR |
1087 | return true; |
1088 | ||
1089 | return false; | |
1090 | } | |
1091 | ||
1a919318 | 1092 | static void handle_reg_beacon(struct wiphy *wiphy, unsigned int chan_idx, |
e38f8a7a LR |
1093 | struct reg_beacon *reg_beacon) |
1094 | { | |
e38f8a7a LR |
1095 | struct ieee80211_supported_band *sband; |
1096 | struct ieee80211_channel *chan; | |
6bad8766 LR |
1097 | bool channel_changed = false; |
1098 | struct ieee80211_channel chan_before; | |
e38f8a7a | 1099 | |
e38f8a7a LR |
1100 | sband = wiphy->bands[reg_beacon->chan.band]; |
1101 | chan = &sband->channels[chan_idx]; | |
1102 | ||
1103 | if (likely(chan->center_freq != reg_beacon->chan.center_freq)) | |
1104 | return; | |
1105 | ||
6bad8766 LR |
1106 | if (chan->beacon_found) |
1107 | return; | |
1108 | ||
1109 | chan->beacon_found = true; | |
1110 | ||
0f500a5f LR |
1111 | if (!reg_is_world_roaming(wiphy)) |
1112 | return; | |
1113 | ||
a2f73b6c | 1114 | if (wiphy->regulatory_flags & REGULATORY_DISABLE_BEACON_HINTS) |
37184244 LR |
1115 | return; |
1116 | ||
6bad8766 LR |
1117 | chan_before.center_freq = chan->center_freq; |
1118 | chan_before.flags = chan->flags; | |
1119 | ||
8fe02e16 LR |
1120 | if (chan->flags & IEEE80211_CHAN_NO_IR) { |
1121 | chan->flags &= ~IEEE80211_CHAN_NO_IR; | |
6bad8766 | 1122 | channel_changed = true; |
e38f8a7a LR |
1123 | } |
1124 | ||
6bad8766 LR |
1125 | if (channel_changed) |
1126 | nl80211_send_beacon_hint_event(wiphy, &chan_before, chan); | |
e38f8a7a LR |
1127 | } |
1128 | ||
1129 | /* | |
1130 | * Called when a scan on a wiphy finds a beacon on | |
1131 | * new channel | |
1132 | */ | |
1133 | static void wiphy_update_new_beacon(struct wiphy *wiphy, | |
1134 | struct reg_beacon *reg_beacon) | |
1135 | { | |
1136 | unsigned int i; | |
1137 | struct ieee80211_supported_band *sband; | |
1138 | ||
e38f8a7a LR |
1139 | if (!wiphy->bands[reg_beacon->chan.band]) |
1140 | return; | |
1141 | ||
1142 | sband = wiphy->bands[reg_beacon->chan.band]; | |
1143 | ||
1144 | for (i = 0; i < sband->n_channels; i++) | |
1145 | handle_reg_beacon(wiphy, i, reg_beacon); | |
1146 | } | |
1147 | ||
1148 | /* | |
1149 | * Called upon reg changes or a new wiphy is added | |
1150 | */ | |
1151 | static void wiphy_update_beacon_reg(struct wiphy *wiphy) | |
1152 | { | |
1153 | unsigned int i; | |
1154 | struct ieee80211_supported_band *sband; | |
1155 | struct reg_beacon *reg_beacon; | |
1156 | ||
e38f8a7a LR |
1157 | list_for_each_entry(reg_beacon, ®_beacon_list, list) { |
1158 | if (!wiphy->bands[reg_beacon->chan.band]) | |
1159 | continue; | |
1160 | sband = wiphy->bands[reg_beacon->chan.band]; | |
1161 | for (i = 0; i < sband->n_channels; i++) | |
1162 | handle_reg_beacon(wiphy, i, reg_beacon); | |
1163 | } | |
1164 | } | |
1165 | ||
e38f8a7a LR |
1166 | /* Reap the advantages of previously found beacons */ |
1167 | static void reg_process_beacons(struct wiphy *wiphy) | |
1168 | { | |
b1ed8ddd LR |
1169 | /* |
1170 | * Means we are just firing up cfg80211, so no beacons would | |
1171 | * have been processed yet. | |
1172 | */ | |
1173 | if (!last_request) | |
1174 | return; | |
e38f8a7a LR |
1175 | wiphy_update_beacon_reg(wiphy); |
1176 | } | |
1177 | ||
1a919318 | 1178 | static bool is_ht40_allowed(struct ieee80211_channel *chan) |
038659e7 LR |
1179 | { |
1180 | if (!chan) | |
1a919318 | 1181 | return false; |
038659e7 | 1182 | if (chan->flags & IEEE80211_CHAN_DISABLED) |
1a919318 | 1183 | return false; |
038659e7 | 1184 | /* This would happen when regulatory rules disallow HT40 completely */ |
55b183ad FF |
1185 | if ((chan->flags & IEEE80211_CHAN_NO_HT40) == IEEE80211_CHAN_NO_HT40) |
1186 | return false; | |
1187 | return true; | |
038659e7 LR |
1188 | } |
1189 | ||
1190 | static void reg_process_ht_flags_channel(struct wiphy *wiphy, | |
fdc9d7b2 | 1191 | struct ieee80211_channel *channel) |
038659e7 | 1192 | { |
fdc9d7b2 | 1193 | struct ieee80211_supported_band *sband = wiphy->bands[channel->band]; |
038659e7 LR |
1194 | struct ieee80211_channel *channel_before = NULL, *channel_after = NULL; |
1195 | unsigned int i; | |
1196 | ||
1a919318 | 1197 | if (!is_ht40_allowed(channel)) { |
038659e7 LR |
1198 | channel->flags |= IEEE80211_CHAN_NO_HT40; |
1199 | return; | |
1200 | } | |
1201 | ||
1202 | /* | |
1203 | * We need to ensure the extension channels exist to | |
1204 | * be able to use HT40- or HT40+, this finds them (or not) | |
1205 | */ | |
1206 | for (i = 0; i < sband->n_channels; i++) { | |
1207 | struct ieee80211_channel *c = &sband->channels[i]; | |
1a919318 | 1208 | |
038659e7 LR |
1209 | if (c->center_freq == (channel->center_freq - 20)) |
1210 | channel_before = c; | |
1211 | if (c->center_freq == (channel->center_freq + 20)) | |
1212 | channel_after = c; | |
1213 | } | |
1214 | ||
1215 | /* | |
1216 | * Please note that this assumes target bandwidth is 20 MHz, | |
1217 | * if that ever changes we also need to change the below logic | |
1218 | * to include that as well. | |
1219 | */ | |
1a919318 | 1220 | if (!is_ht40_allowed(channel_before)) |
689da1b3 | 1221 | channel->flags |= IEEE80211_CHAN_NO_HT40MINUS; |
038659e7 | 1222 | else |
689da1b3 | 1223 | channel->flags &= ~IEEE80211_CHAN_NO_HT40MINUS; |
038659e7 | 1224 | |
1a919318 | 1225 | if (!is_ht40_allowed(channel_after)) |
689da1b3 | 1226 | channel->flags |= IEEE80211_CHAN_NO_HT40PLUS; |
038659e7 | 1227 | else |
689da1b3 | 1228 | channel->flags &= ~IEEE80211_CHAN_NO_HT40PLUS; |
038659e7 LR |
1229 | } |
1230 | ||
1231 | static void reg_process_ht_flags_band(struct wiphy *wiphy, | |
fdc9d7b2 | 1232 | struct ieee80211_supported_band *sband) |
038659e7 LR |
1233 | { |
1234 | unsigned int i; | |
038659e7 | 1235 | |
fdc9d7b2 JB |
1236 | if (!sband) |
1237 | return; | |
038659e7 LR |
1238 | |
1239 | for (i = 0; i < sband->n_channels; i++) | |
fdc9d7b2 | 1240 | reg_process_ht_flags_channel(wiphy, &sband->channels[i]); |
038659e7 LR |
1241 | } |
1242 | ||
1243 | static void reg_process_ht_flags(struct wiphy *wiphy) | |
1244 | { | |
1245 | enum ieee80211_band band; | |
1246 | ||
1247 | if (!wiphy) | |
1248 | return; | |
1249 | ||
fdc9d7b2 JB |
1250 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) |
1251 | reg_process_ht_flags_band(wiphy, wiphy->bands[band]); | |
038659e7 LR |
1252 | } |
1253 | ||
0e3802db LR |
1254 | static void reg_call_notifier(struct wiphy *wiphy, |
1255 | struct regulatory_request *request) | |
1256 | { | |
1257 | if (wiphy->reg_notifier) | |
1258 | wiphy->reg_notifier(wiphy, request); | |
1259 | } | |
1260 | ||
eac03e38 SN |
1261 | static void wiphy_update_regulatory(struct wiphy *wiphy, |
1262 | enum nl80211_reg_initiator initiator) | |
b2e1b302 LR |
1263 | { |
1264 | enum ieee80211_band band; | |
c492db37 | 1265 | struct regulatory_request *lr = get_last_request(); |
eac03e38 | 1266 | |
0e3802db LR |
1267 | if (ignore_reg_update(wiphy, initiator)) { |
1268 | /* | |
1269 | * Regulatory updates set by CORE are ignored for custom | |
1270 | * regulatory cards. Let us notify the changes to the driver, | |
1271 | * as some drivers used this to restore its orig_* reg domain. | |
1272 | */ | |
1273 | if (initiator == NL80211_REGDOM_SET_BY_CORE && | |
a2f73b6c | 1274 | wiphy->regulatory_flags & REGULATORY_CUSTOM_REG) |
0e3802db | 1275 | reg_call_notifier(wiphy, lr); |
a203c2aa | 1276 | return; |
0e3802db | 1277 | } |
a203c2aa | 1278 | |
c492db37 | 1279 | lr->dfs_region = get_cfg80211_regdom()->dfs_region; |
b68e6b3b | 1280 | |
fdc9d7b2 JB |
1281 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) |
1282 | handle_band(wiphy, initiator, wiphy->bands[band]); | |
a203c2aa | 1283 | |
e38f8a7a | 1284 | reg_process_beacons(wiphy); |
038659e7 | 1285 | reg_process_ht_flags(wiphy); |
0e3802db | 1286 | reg_call_notifier(wiphy, lr); |
b2e1b302 LR |
1287 | } |
1288 | ||
d7549cbb SN |
1289 | static void update_all_wiphy_regulatory(enum nl80211_reg_initiator initiator) |
1290 | { | |
1291 | struct cfg80211_registered_device *rdev; | |
4a38994f | 1292 | struct wiphy *wiphy; |
d7549cbb | 1293 | |
5fe231e8 | 1294 | ASSERT_RTNL(); |
458f4f9e | 1295 | |
4a38994f RM |
1296 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) { |
1297 | wiphy = &rdev->wiphy; | |
1298 | wiphy_update_regulatory(wiphy, initiator); | |
4a38994f | 1299 | } |
d7549cbb SN |
1300 | } |
1301 | ||
1fa25e41 | 1302 | static void handle_channel_custom(struct wiphy *wiphy, |
fdc9d7b2 | 1303 | struct ieee80211_channel *chan, |
1fa25e41 LR |
1304 | const struct ieee80211_regdomain *regd) |
1305 | { | |
038659e7 | 1306 | u32 bw_flags = 0; |
1fa25e41 LR |
1307 | const struct ieee80211_reg_rule *reg_rule = NULL; |
1308 | const struct ieee80211_power_rule *power_rule = NULL; | |
038659e7 | 1309 | const struct ieee80211_freq_range *freq_range = NULL; |
ac46d48e | 1310 | |
361c9c8b JB |
1311 | reg_rule = freq_reg_info_regd(wiphy, MHZ_TO_KHZ(chan->center_freq), |
1312 | regd); | |
1fa25e41 | 1313 | |
361c9c8b | 1314 | if (IS_ERR(reg_rule)) { |
fe7ef5e9 JB |
1315 | REG_DBG_PRINT("Disabling freq %d MHz as custom regd has no rule that fits it\n", |
1316 | chan->center_freq); | |
cc493e4f LR |
1317 | chan->orig_flags |= IEEE80211_CHAN_DISABLED; |
1318 | chan->flags = chan->orig_flags; | |
1fa25e41 LR |
1319 | return; |
1320 | } | |
1321 | ||
fe7ef5e9 | 1322 | chan_reg_rule_print_dbg(chan, reg_rule); |
e702d3cf | 1323 | |
1fa25e41 | 1324 | power_rule = ®_rule->power_rule; |
038659e7 LR |
1325 | freq_range = ®_rule->freq_range; |
1326 | ||
1327 | if (freq_range->max_bandwidth_khz < MHZ_TO_KHZ(40)) | |
1328 | bw_flags = IEEE80211_CHAN_NO_HT40; | |
c7a6ee27 JB |
1329 | if (freq_range->max_bandwidth_khz < MHZ_TO_KHZ(80)) |
1330 | bw_flags |= IEEE80211_CHAN_NO_80MHZ; | |
1331 | if (freq_range->max_bandwidth_khz < MHZ_TO_KHZ(160)) | |
1332 | bw_flags |= IEEE80211_CHAN_NO_160MHZ; | |
1fa25e41 | 1333 | |
038659e7 | 1334 | chan->flags |= map_regdom_flags(reg_rule->flags) | bw_flags; |
1fa25e41 | 1335 | chan->max_antenna_gain = (int) MBI_TO_DBI(power_rule->max_antenna_gain); |
279f0f55 FF |
1336 | chan->max_reg_power = chan->max_power = |
1337 | (int) MBM_TO_DBM(power_rule->max_eirp); | |
1fa25e41 LR |
1338 | } |
1339 | ||
fdc9d7b2 JB |
1340 | static void handle_band_custom(struct wiphy *wiphy, |
1341 | struct ieee80211_supported_band *sband, | |
1fa25e41 LR |
1342 | const struct ieee80211_regdomain *regd) |
1343 | { | |
1344 | unsigned int i; | |
1fa25e41 | 1345 | |
fdc9d7b2 JB |
1346 | if (!sband) |
1347 | return; | |
1fa25e41 LR |
1348 | |
1349 | for (i = 0; i < sband->n_channels; i++) | |
fdc9d7b2 | 1350 | handle_channel_custom(wiphy, &sband->channels[i], regd); |
1fa25e41 LR |
1351 | } |
1352 | ||
1353 | /* Used by drivers prior to wiphy registration */ | |
1354 | void wiphy_apply_custom_regulatory(struct wiphy *wiphy, | |
1355 | const struct ieee80211_regdomain *regd) | |
1356 | { | |
1357 | enum ieee80211_band band; | |
bbcf3f02 | 1358 | unsigned int bands_set = 0; |
ac46d48e | 1359 | |
a2f73b6c LR |
1360 | WARN(!(wiphy->regulatory_flags & REGULATORY_CUSTOM_REG), |
1361 | "wiphy should have REGULATORY_CUSTOM_REG\n"); | |
1362 | wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG; | |
222ea581 | 1363 | |
1fa25e41 | 1364 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) { |
bbcf3f02 LR |
1365 | if (!wiphy->bands[band]) |
1366 | continue; | |
fdc9d7b2 | 1367 | handle_band_custom(wiphy, wiphy->bands[band], regd); |
bbcf3f02 | 1368 | bands_set++; |
b2e1b302 | 1369 | } |
bbcf3f02 LR |
1370 | |
1371 | /* | |
1372 | * no point in calling this if it won't have any effect | |
1a919318 | 1373 | * on your device's supported bands. |
bbcf3f02 LR |
1374 | */ |
1375 | WARN_ON(!bands_set); | |
b2e1b302 | 1376 | } |
1fa25e41 LR |
1377 | EXPORT_SYMBOL(wiphy_apply_custom_regulatory); |
1378 | ||
b2e253cf LR |
1379 | static void reg_set_request_processed(void) |
1380 | { | |
1381 | bool need_more_processing = false; | |
c492db37 | 1382 | struct regulatory_request *lr = get_last_request(); |
b2e253cf | 1383 | |
c492db37 | 1384 | lr->processed = true; |
b2e253cf LR |
1385 | |
1386 | spin_lock(®_requests_lock); | |
1387 | if (!list_empty(®_requests_list)) | |
1388 | need_more_processing = true; | |
1389 | spin_unlock(®_requests_lock); | |
1390 | ||
c492db37 | 1391 | if (lr->initiator == NL80211_REGDOM_SET_BY_USER) |
fe20b39e | 1392 | cancel_delayed_work(®_timeout); |
a90c7a31 | 1393 | |
b2e253cf LR |
1394 | if (need_more_processing) |
1395 | schedule_work(®_work); | |
1396 | } | |
1397 | ||
b3eb7f3f LR |
1398 | /** |
1399 | * reg_process_hint_core - process core regulatory requests | |
1400 | * @pending_request: a pending core regulatory request | |
1401 | * | |
1402 | * The wireless subsystem can use this function to process | |
1403 | * a regulatory request issued by the regulatory core. | |
1404 | * | |
1405 | * Returns one of the different reg request treatment values. | |
1406 | */ | |
1407 | static enum reg_request_treatment | |
1408 | reg_process_hint_core(struct regulatory_request *core_request) | |
1409 | { | |
b3eb7f3f LR |
1410 | |
1411 | core_request->intersect = false; | |
1412 | core_request->processed = false; | |
5ad6ef5e | 1413 | |
05f1a3ea | 1414 | reg_update_last_request(core_request); |
b3eb7f3f | 1415 | |
fe6631ff | 1416 | return reg_call_crda(core_request); |
b3eb7f3f LR |
1417 | } |
1418 | ||
0d97a619 LR |
1419 | static enum reg_request_treatment |
1420 | __reg_process_hint_user(struct regulatory_request *user_request) | |
1421 | { | |
1422 | struct regulatory_request *lr = get_last_request(); | |
1423 | ||
1424 | if (reg_request_cell_base(user_request)) | |
1425 | return reg_ignore_cell_hint(user_request); | |
1426 | ||
1427 | if (reg_request_cell_base(lr)) | |
1428 | return REG_REQ_IGNORE; | |
1429 | ||
1430 | if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) | |
1431 | return REG_REQ_INTERSECT; | |
1432 | /* | |
1433 | * If the user knows better the user should set the regdom | |
1434 | * to their country before the IE is picked up | |
1435 | */ | |
1436 | if (lr->initiator == NL80211_REGDOM_SET_BY_USER && | |
1437 | lr->intersect) | |
1438 | return REG_REQ_IGNORE; | |
1439 | /* | |
1440 | * Process user requests only after previous user/driver/core | |
1441 | * requests have been processed | |
1442 | */ | |
1443 | if ((lr->initiator == NL80211_REGDOM_SET_BY_CORE || | |
1444 | lr->initiator == NL80211_REGDOM_SET_BY_DRIVER || | |
1445 | lr->initiator == NL80211_REGDOM_SET_BY_USER) && | |
1446 | regdom_changes(lr->alpha2)) | |
1447 | return REG_REQ_IGNORE; | |
1448 | ||
1449 | if (!regdom_changes(user_request->alpha2)) | |
1450 | return REG_REQ_ALREADY_SET; | |
1451 | ||
1452 | return REG_REQ_OK; | |
1453 | } | |
1454 | ||
1455 | /** | |
1456 | * reg_process_hint_user - process user regulatory requests | |
1457 | * @user_request: a pending user regulatory request | |
1458 | * | |
1459 | * The wireless subsystem can use this function to process | |
1460 | * a regulatory request initiated by userspace. | |
1461 | * | |
1462 | * Returns one of the different reg request treatment values. | |
1463 | */ | |
1464 | static enum reg_request_treatment | |
1465 | reg_process_hint_user(struct regulatory_request *user_request) | |
1466 | { | |
1467 | enum reg_request_treatment treatment; | |
0d97a619 LR |
1468 | |
1469 | treatment = __reg_process_hint_user(user_request); | |
1470 | if (treatment == REG_REQ_IGNORE || | |
1471 | treatment == REG_REQ_ALREADY_SET) { | |
1472 | kfree(user_request); | |
1473 | return treatment; | |
1474 | } | |
1475 | ||
0d97a619 LR |
1476 | user_request->intersect = treatment == REG_REQ_INTERSECT; |
1477 | user_request->processed = false; | |
5ad6ef5e | 1478 | |
05f1a3ea | 1479 | reg_update_last_request(user_request); |
0d97a619 LR |
1480 | |
1481 | user_alpha2[0] = user_request->alpha2[0]; | |
1482 | user_alpha2[1] = user_request->alpha2[1]; | |
1483 | ||
fe6631ff | 1484 | return reg_call_crda(user_request); |
0d97a619 LR |
1485 | } |
1486 | ||
21636c7f LR |
1487 | static enum reg_request_treatment |
1488 | __reg_process_hint_driver(struct regulatory_request *driver_request) | |
1489 | { | |
1490 | struct regulatory_request *lr = get_last_request(); | |
1491 | ||
1492 | if (lr->initiator == NL80211_REGDOM_SET_BY_CORE) { | |
1493 | if (regdom_changes(driver_request->alpha2)) | |
1494 | return REG_REQ_OK; | |
1495 | return REG_REQ_ALREADY_SET; | |
1496 | } | |
1497 | ||
1498 | /* | |
1499 | * This would happen if you unplug and plug your card | |
1500 | * back in or if you add a new device for which the previously | |
1501 | * loaded card also agrees on the regulatory domain. | |
1502 | */ | |
1503 | if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER && | |
1504 | !regdom_changes(driver_request->alpha2)) | |
1505 | return REG_REQ_ALREADY_SET; | |
1506 | ||
1507 | return REG_REQ_INTERSECT; | |
1508 | } | |
1509 | ||
1510 | /** | |
1511 | * reg_process_hint_driver - process driver regulatory requests | |
1512 | * @driver_request: a pending driver regulatory request | |
1513 | * | |
1514 | * The wireless subsystem can use this function to process | |
1515 | * a regulatory request issued by an 802.11 driver. | |
1516 | * | |
1517 | * Returns one of the different reg request treatment values. | |
1518 | */ | |
1519 | static enum reg_request_treatment | |
1520 | reg_process_hint_driver(struct wiphy *wiphy, | |
1521 | struct regulatory_request *driver_request) | |
1522 | { | |
1523 | const struct ieee80211_regdomain *regd; | |
1524 | enum reg_request_treatment treatment; | |
21636c7f LR |
1525 | |
1526 | treatment = __reg_process_hint_driver(driver_request); | |
1527 | ||
1528 | switch (treatment) { | |
1529 | case REG_REQ_OK: | |
1530 | break; | |
1531 | case REG_REQ_IGNORE: | |
1532 | kfree(driver_request); | |
1533 | return treatment; | |
1534 | case REG_REQ_INTERSECT: | |
1535 | /* fall through */ | |
1536 | case REG_REQ_ALREADY_SET: | |
1537 | regd = reg_copy_regd(get_cfg80211_regdom()); | |
1538 | if (IS_ERR(regd)) { | |
1539 | kfree(driver_request); | |
1540 | return REG_REQ_IGNORE; | |
1541 | } | |
1542 | rcu_assign_pointer(wiphy->regd, regd); | |
1543 | } | |
1544 | ||
21636c7f LR |
1545 | |
1546 | driver_request->intersect = treatment == REG_REQ_INTERSECT; | |
1547 | driver_request->processed = false; | |
5ad6ef5e | 1548 | |
05f1a3ea | 1549 | reg_update_last_request(driver_request); |
21636c7f LR |
1550 | |
1551 | /* | |
1552 | * Since CRDA will not be called in this case as we already | |
1553 | * have applied the requested regulatory domain before we just | |
1554 | * inform userspace we have processed the request | |
1555 | */ | |
1556 | if (treatment == REG_REQ_ALREADY_SET) { | |
1557 | nl80211_send_reg_change_event(driver_request); | |
1558 | reg_set_request_processed(); | |
1559 | return treatment; | |
1560 | } | |
1561 | ||
fe6631ff | 1562 | return reg_call_crda(driver_request); |
21636c7f LR |
1563 | } |
1564 | ||
b23e7a9e LR |
1565 | static enum reg_request_treatment |
1566 | __reg_process_hint_country_ie(struct wiphy *wiphy, | |
1567 | struct regulatory_request *country_ie_request) | |
1568 | { | |
1569 | struct wiphy *last_wiphy = NULL; | |
1570 | struct regulatory_request *lr = get_last_request(); | |
1571 | ||
1572 | if (reg_request_cell_base(lr)) { | |
1573 | /* Trust a Cell base station over the AP's country IE */ | |
1574 | if (regdom_changes(country_ie_request->alpha2)) | |
1575 | return REG_REQ_IGNORE; | |
1576 | return REG_REQ_ALREADY_SET; | |
2a901468 LR |
1577 | } else { |
1578 | if (wiphy->regulatory_flags & REGULATORY_COUNTRY_IE_IGNORE) | |
1579 | return REG_REQ_IGNORE; | |
b23e7a9e LR |
1580 | } |
1581 | ||
b23e7a9e LR |
1582 | if (unlikely(!is_an_alpha2(country_ie_request->alpha2))) |
1583 | return -EINVAL; | |
2f1c6c57 LR |
1584 | |
1585 | if (lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE) | |
1586 | return REG_REQ_OK; | |
1587 | ||
1588 | last_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx); | |
1589 | ||
1590 | if (last_wiphy != wiphy) { | |
b23e7a9e | 1591 | /* |
2f1c6c57 LR |
1592 | * Two cards with two APs claiming different |
1593 | * Country IE alpha2s. We could | |
1594 | * intersect them, but that seems unlikely | |
1595 | * to be correct. Reject second one for now. | |
b23e7a9e | 1596 | */ |
2f1c6c57 LR |
1597 | if (regdom_changes(country_ie_request->alpha2)) |
1598 | return REG_REQ_IGNORE; | |
b23e7a9e LR |
1599 | return REG_REQ_ALREADY_SET; |
1600 | } | |
2f1c6c57 LR |
1601 | /* |
1602 | * Two consecutive Country IE hints on the same wiphy. | |
1603 | * This should be picked up early by the driver/stack | |
1604 | */ | |
1605 | if (WARN_ON(regdom_changes(country_ie_request->alpha2))) | |
1606 | return REG_REQ_OK; | |
1607 | return REG_REQ_ALREADY_SET; | |
b23e7a9e LR |
1608 | } |
1609 | ||
d1c96a9a | 1610 | /** |
b23e7a9e LR |
1611 | * reg_process_hint_country_ie - process regulatory requests from country IEs |
1612 | * @country_ie_request: a regulatory request from a country IE | |
d1c96a9a | 1613 | * |
b23e7a9e LR |
1614 | * The wireless subsystem can use this function to process |
1615 | * a regulatory request issued by a country Information Element. | |
d1c96a9a | 1616 | * |
2f92212b | 1617 | * Returns one of the different reg request treatment values. |
d1c96a9a | 1618 | */ |
2f92212b | 1619 | static enum reg_request_treatment |
b23e7a9e LR |
1620 | reg_process_hint_country_ie(struct wiphy *wiphy, |
1621 | struct regulatory_request *country_ie_request) | |
b2e1b302 | 1622 | { |
2f92212b | 1623 | enum reg_request_treatment treatment; |
761cf7ec | 1624 | |
b23e7a9e | 1625 | treatment = __reg_process_hint_country_ie(wiphy, country_ie_request); |
9c96477d | 1626 | |
2f92212b | 1627 | switch (treatment) { |
2f92212b JB |
1628 | case REG_REQ_OK: |
1629 | break; | |
b23e7a9e LR |
1630 | case REG_REQ_IGNORE: |
1631 | /* fall through */ | |
1632 | case REG_REQ_ALREADY_SET: | |
1633 | kfree(country_ie_request); | |
1634 | return treatment; | |
1635 | case REG_REQ_INTERSECT: | |
1636 | kfree(country_ie_request); | |
fb1fc7ad | 1637 | /* |
b23e7a9e LR |
1638 | * This doesn't happen yet, not sure we |
1639 | * ever want to support it for this case. | |
fb1fc7ad | 1640 | */ |
b23e7a9e LR |
1641 | WARN_ONCE(1, "Unexpected intersection for country IEs"); |
1642 | return REG_REQ_IGNORE; | |
3e0c3ff3 | 1643 | } |
b2e1b302 | 1644 | |
b23e7a9e LR |
1645 | country_ie_request->intersect = false; |
1646 | country_ie_request->processed = false; | |
5ad6ef5e | 1647 | |
05f1a3ea | 1648 | reg_update_last_request(country_ie_request); |
3e0c3ff3 | 1649 | |
fe6631ff | 1650 | return reg_call_crda(country_ie_request); |
b2e1b302 LR |
1651 | } |
1652 | ||
30a548c7 | 1653 | /* This processes *all* regulatory hints */ |
1daa37c7 | 1654 | static void reg_process_hint(struct regulatory_request *reg_request) |
fe33eb39 | 1655 | { |
fe33eb39 | 1656 | struct wiphy *wiphy = NULL; |
b3eb7f3f | 1657 | enum reg_request_treatment treatment; |
fe33eb39 | 1658 | |
fdc9d7b2 JB |
1659 | if (WARN_ON(!reg_request->alpha2)) |
1660 | return; | |
fe33eb39 | 1661 | |
f4173766 | 1662 | if (reg_request->wiphy_idx != WIPHY_IDX_INVALID) |
fe33eb39 LR |
1663 | wiphy = wiphy_idx_to_wiphy(reg_request->wiphy_idx); |
1664 | ||
1daa37c7 | 1665 | if (reg_request->initiator == NL80211_REGDOM_SET_BY_DRIVER && !wiphy) { |
d951c1dd | 1666 | kfree(reg_request); |
b0e2880b | 1667 | return; |
fe33eb39 LR |
1668 | } |
1669 | ||
b3eb7f3f LR |
1670 | switch (reg_request->initiator) { |
1671 | case NL80211_REGDOM_SET_BY_CORE: | |
1672 | reg_process_hint_core(reg_request); | |
1673 | return; | |
1674 | case NL80211_REGDOM_SET_BY_USER: | |
0d97a619 LR |
1675 | treatment = reg_process_hint_user(reg_request); |
1676 | if (treatment == REG_REQ_OK || | |
1677 | treatment == REG_REQ_ALREADY_SET) | |
1678 | return; | |
1679 | schedule_delayed_work(®_timeout, msecs_to_jiffies(3142)); | |
1680 | return; | |
b3eb7f3f | 1681 | case NL80211_REGDOM_SET_BY_DRIVER: |
21636c7f LR |
1682 | treatment = reg_process_hint_driver(wiphy, reg_request); |
1683 | break; | |
b3eb7f3f | 1684 | case NL80211_REGDOM_SET_BY_COUNTRY_IE: |
b23e7a9e | 1685 | treatment = reg_process_hint_country_ie(wiphy, reg_request); |
b3eb7f3f LR |
1686 | break; |
1687 | default: | |
1688 | WARN(1, "invalid initiator %d\n", reg_request->initiator); | |
1689 | return; | |
1690 | } | |
1691 | ||
b23e7a9e LR |
1692 | /* This is required so that the orig_* parameters are saved */ |
1693 | if (treatment == REG_REQ_ALREADY_SET && wiphy && | |
a2f73b6c | 1694 | wiphy->regulatory_flags & REGULATORY_STRICT_REG) |
b23e7a9e | 1695 | wiphy_update_regulatory(wiphy, reg_request->initiator); |
fe33eb39 LR |
1696 | } |
1697 | ||
b2e253cf LR |
1698 | /* |
1699 | * Processes regulatory hints, this is all the NL80211_REGDOM_SET_BY_* | |
1700 | * Regulatory hints come on a first come first serve basis and we | |
1701 | * must process each one atomically. | |
1702 | */ | |
fe33eb39 | 1703 | static void reg_process_pending_hints(void) |
b0e2880b | 1704 | { |
c492db37 | 1705 | struct regulatory_request *reg_request, *lr; |
fe33eb39 | 1706 | |
c492db37 | 1707 | lr = get_last_request(); |
b0e2880b | 1708 | |
b2e253cf | 1709 | /* When last_request->processed becomes true this will be rescheduled */ |
c492db37 | 1710 | if (lr && !lr->processed) { |
1a919318 | 1711 | REG_DBG_PRINT("Pending regulatory request, waiting for it to be processed...\n"); |
5fe231e8 | 1712 | return; |
b2e253cf LR |
1713 | } |
1714 | ||
fe33eb39 | 1715 | spin_lock(®_requests_lock); |
fe33eb39 | 1716 | |
b2e253cf | 1717 | if (list_empty(®_requests_list)) { |
d951c1dd | 1718 | spin_unlock(®_requests_lock); |
5fe231e8 | 1719 | return; |
fe33eb39 | 1720 | } |
b2e253cf LR |
1721 | |
1722 | reg_request = list_first_entry(®_requests_list, | |
1723 | struct regulatory_request, | |
1724 | list); | |
1725 | list_del_init(®_request->list); | |
1726 | ||
fe33eb39 | 1727 | spin_unlock(®_requests_lock); |
b0e2880b | 1728 | |
1daa37c7 | 1729 | reg_process_hint(reg_request); |
fe33eb39 LR |
1730 | } |
1731 | ||
e38f8a7a LR |
1732 | /* Processes beacon hints -- this has nothing to do with country IEs */ |
1733 | static void reg_process_pending_beacon_hints(void) | |
1734 | { | |
79c97e97 | 1735 | struct cfg80211_registered_device *rdev; |
e38f8a7a LR |
1736 | struct reg_beacon *pending_beacon, *tmp; |
1737 | ||
e38f8a7a LR |
1738 | /* This goes through the _pending_ beacon list */ |
1739 | spin_lock_bh(®_pending_beacons_lock); | |
1740 | ||
e38f8a7a LR |
1741 | list_for_each_entry_safe(pending_beacon, tmp, |
1742 | ®_pending_beacons, list) { | |
e38f8a7a LR |
1743 | list_del_init(&pending_beacon->list); |
1744 | ||
1745 | /* Applies the beacon hint to current wiphys */ | |
79c97e97 JB |
1746 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) |
1747 | wiphy_update_new_beacon(&rdev->wiphy, pending_beacon); | |
e38f8a7a LR |
1748 | |
1749 | /* Remembers the beacon hint for new wiphys or reg changes */ | |
1750 | list_add_tail(&pending_beacon->list, ®_beacon_list); | |
1751 | } | |
1752 | ||
1753 | spin_unlock_bh(®_pending_beacons_lock); | |
e38f8a7a LR |
1754 | } |
1755 | ||
fe33eb39 LR |
1756 | static void reg_todo(struct work_struct *work) |
1757 | { | |
5fe231e8 | 1758 | rtnl_lock(); |
fe33eb39 | 1759 | reg_process_pending_hints(); |
e38f8a7a | 1760 | reg_process_pending_beacon_hints(); |
5fe231e8 | 1761 | rtnl_unlock(); |
fe33eb39 LR |
1762 | } |
1763 | ||
fe33eb39 LR |
1764 | static void queue_regulatory_request(struct regulatory_request *request) |
1765 | { | |
d4f2c881 JB |
1766 | request->alpha2[0] = toupper(request->alpha2[0]); |
1767 | request->alpha2[1] = toupper(request->alpha2[1]); | |
c61029c7 | 1768 | |
fe33eb39 LR |
1769 | spin_lock(®_requests_lock); |
1770 | list_add_tail(&request->list, ®_requests_list); | |
1771 | spin_unlock(®_requests_lock); | |
1772 | ||
1773 | schedule_work(®_work); | |
1774 | } | |
1775 | ||
09d989d1 LR |
1776 | /* |
1777 | * Core regulatory hint -- happens during cfg80211_init() | |
1778 | * and when we restore regulatory settings. | |
1779 | */ | |
ba25c141 LR |
1780 | static int regulatory_hint_core(const char *alpha2) |
1781 | { | |
1782 | struct regulatory_request *request; | |
1783 | ||
1a919318 | 1784 | request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); |
ba25c141 LR |
1785 | if (!request) |
1786 | return -ENOMEM; | |
1787 | ||
1788 | request->alpha2[0] = alpha2[0]; | |
1789 | request->alpha2[1] = alpha2[1]; | |
7db90f4a | 1790 | request->initiator = NL80211_REGDOM_SET_BY_CORE; |
ba25c141 | 1791 | |
31e99729 | 1792 | queue_regulatory_request(request); |
5078b2e3 | 1793 | |
fe33eb39 | 1794 | return 0; |
ba25c141 LR |
1795 | } |
1796 | ||
fe33eb39 | 1797 | /* User hints */ |
57b5ce07 LR |
1798 | int regulatory_hint_user(const char *alpha2, |
1799 | enum nl80211_user_reg_hint_type user_reg_hint_type) | |
b2e1b302 | 1800 | { |
fe33eb39 LR |
1801 | struct regulatory_request *request; |
1802 | ||
fdc9d7b2 JB |
1803 | if (WARN_ON(!alpha2)) |
1804 | return -EINVAL; | |
b2e1b302 | 1805 | |
fe33eb39 LR |
1806 | request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); |
1807 | if (!request) | |
1808 | return -ENOMEM; | |
1809 | ||
f4173766 | 1810 | request->wiphy_idx = WIPHY_IDX_INVALID; |
fe33eb39 LR |
1811 | request->alpha2[0] = alpha2[0]; |
1812 | request->alpha2[1] = alpha2[1]; | |
e12822e1 | 1813 | request->initiator = NL80211_REGDOM_SET_BY_USER; |
57b5ce07 | 1814 | request->user_reg_hint_type = user_reg_hint_type; |
fe33eb39 LR |
1815 | |
1816 | queue_regulatory_request(request); | |
1817 | ||
1818 | return 0; | |
1819 | } | |
1820 | ||
1821 | /* Driver hints */ | |
1822 | int regulatory_hint(struct wiphy *wiphy, const char *alpha2) | |
1823 | { | |
1824 | struct regulatory_request *request; | |
1825 | ||
fdc9d7b2 JB |
1826 | if (WARN_ON(!alpha2 || !wiphy)) |
1827 | return -EINVAL; | |
fe33eb39 LR |
1828 | |
1829 | request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); | |
1830 | if (!request) | |
1831 | return -ENOMEM; | |
1832 | ||
1833 | request->wiphy_idx = get_wiphy_idx(wiphy); | |
1834 | ||
fe33eb39 LR |
1835 | request->alpha2[0] = alpha2[0]; |
1836 | request->alpha2[1] = alpha2[1]; | |
7db90f4a | 1837 | request->initiator = NL80211_REGDOM_SET_BY_DRIVER; |
fe33eb39 LR |
1838 | |
1839 | queue_regulatory_request(request); | |
1840 | ||
1841 | return 0; | |
b2e1b302 LR |
1842 | } |
1843 | EXPORT_SYMBOL(regulatory_hint); | |
1844 | ||
789fd033 LR |
1845 | void regulatory_hint_country_ie(struct wiphy *wiphy, enum ieee80211_band band, |
1846 | const u8 *country_ie, u8 country_ie_len) | |
3f2355cb | 1847 | { |
3f2355cb | 1848 | char alpha2[2]; |
3f2355cb | 1849 | enum environment_cap env = ENVIRON_ANY; |
db2424c5 | 1850 | struct regulatory_request *request = NULL, *lr; |
d335fe63 | 1851 | |
3f2355cb LR |
1852 | /* IE len must be evenly divisible by 2 */ |
1853 | if (country_ie_len & 0x01) | |
db2424c5 | 1854 | return; |
3f2355cb LR |
1855 | |
1856 | if (country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN) | |
db2424c5 JB |
1857 | return; |
1858 | ||
1859 | request = kzalloc(sizeof(*request), GFP_KERNEL); | |
1860 | if (!request) | |
1861 | return; | |
3f2355cb | 1862 | |
3f2355cb LR |
1863 | alpha2[0] = country_ie[0]; |
1864 | alpha2[1] = country_ie[1]; | |
1865 | ||
1866 | if (country_ie[2] == 'I') | |
1867 | env = ENVIRON_INDOOR; | |
1868 | else if (country_ie[2] == 'O') | |
1869 | env = ENVIRON_OUTDOOR; | |
1870 | ||
db2424c5 JB |
1871 | rcu_read_lock(); |
1872 | lr = get_last_request(); | |
1873 | ||
1874 | if (unlikely(!lr)) | |
1875 | goto out; | |
1876 | ||
fb1fc7ad | 1877 | /* |
8b19e6ca | 1878 | * We will run this only upon a successful connection on cfg80211. |
4b44c8bc | 1879 | * We leave conflict resolution to the workqueue, where can hold |
5fe231e8 | 1880 | * the RTNL. |
fb1fc7ad | 1881 | */ |
c492db37 JB |
1882 | if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE && |
1883 | lr->wiphy_idx != WIPHY_IDX_INVALID) | |
4b44c8bc | 1884 | goto out; |
3f2355cb | 1885 | |
fe33eb39 | 1886 | request->wiphy_idx = get_wiphy_idx(wiphy); |
4f366c5d JL |
1887 | request->alpha2[0] = alpha2[0]; |
1888 | request->alpha2[1] = alpha2[1]; | |
7db90f4a | 1889 | request->initiator = NL80211_REGDOM_SET_BY_COUNTRY_IE; |
fe33eb39 LR |
1890 | request->country_ie_env = env; |
1891 | ||
fe33eb39 | 1892 | queue_regulatory_request(request); |
db2424c5 | 1893 | request = NULL; |
3f2355cb | 1894 | out: |
db2424c5 JB |
1895 | kfree(request); |
1896 | rcu_read_unlock(); | |
3f2355cb | 1897 | } |
b2e1b302 | 1898 | |
09d989d1 LR |
1899 | static void restore_alpha2(char *alpha2, bool reset_user) |
1900 | { | |
1901 | /* indicates there is no alpha2 to consider for restoration */ | |
1902 | alpha2[0] = '9'; | |
1903 | alpha2[1] = '7'; | |
1904 | ||
1905 | /* The user setting has precedence over the module parameter */ | |
1906 | if (is_user_regdom_saved()) { | |
1907 | /* Unless we're asked to ignore it and reset it */ | |
1908 | if (reset_user) { | |
1a919318 | 1909 | REG_DBG_PRINT("Restoring regulatory settings including user preference\n"); |
09d989d1 LR |
1910 | user_alpha2[0] = '9'; |
1911 | user_alpha2[1] = '7'; | |
1912 | ||
1913 | /* | |
1914 | * If we're ignoring user settings, we still need to | |
1915 | * check the module parameter to ensure we put things | |
1916 | * back as they were for a full restore. | |
1917 | */ | |
1918 | if (!is_world_regdom(ieee80211_regdom)) { | |
1a919318 JB |
1919 | REG_DBG_PRINT("Keeping preference on module parameter ieee80211_regdom: %c%c\n", |
1920 | ieee80211_regdom[0], ieee80211_regdom[1]); | |
09d989d1 LR |
1921 | alpha2[0] = ieee80211_regdom[0]; |
1922 | alpha2[1] = ieee80211_regdom[1]; | |
1923 | } | |
1924 | } else { | |
1a919318 JB |
1925 | REG_DBG_PRINT("Restoring regulatory settings while preserving user preference for: %c%c\n", |
1926 | user_alpha2[0], user_alpha2[1]); | |
09d989d1 LR |
1927 | alpha2[0] = user_alpha2[0]; |
1928 | alpha2[1] = user_alpha2[1]; | |
1929 | } | |
1930 | } else if (!is_world_regdom(ieee80211_regdom)) { | |
1a919318 JB |
1931 | REG_DBG_PRINT("Keeping preference on module parameter ieee80211_regdom: %c%c\n", |
1932 | ieee80211_regdom[0], ieee80211_regdom[1]); | |
09d989d1 LR |
1933 | alpha2[0] = ieee80211_regdom[0]; |
1934 | alpha2[1] = ieee80211_regdom[1]; | |
1935 | } else | |
d91e41b6 | 1936 | REG_DBG_PRINT("Restoring regulatory settings\n"); |
09d989d1 LR |
1937 | } |
1938 | ||
5ce543d1 RM |
1939 | static void restore_custom_reg_settings(struct wiphy *wiphy) |
1940 | { | |
1941 | struct ieee80211_supported_band *sband; | |
1942 | enum ieee80211_band band; | |
1943 | struct ieee80211_channel *chan; | |
1944 | int i; | |
1945 | ||
1946 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) { | |
1947 | sband = wiphy->bands[band]; | |
1948 | if (!sband) | |
1949 | continue; | |
1950 | for (i = 0; i < sband->n_channels; i++) { | |
1951 | chan = &sband->channels[i]; | |
1952 | chan->flags = chan->orig_flags; | |
1953 | chan->max_antenna_gain = chan->orig_mag; | |
1954 | chan->max_power = chan->orig_mpwr; | |
899852af | 1955 | chan->beacon_found = false; |
5ce543d1 RM |
1956 | } |
1957 | } | |
1958 | } | |
1959 | ||
09d989d1 LR |
1960 | /* |
1961 | * Restoring regulatory settings involves ingoring any | |
1962 | * possibly stale country IE information and user regulatory | |
1963 | * settings if so desired, this includes any beacon hints | |
1964 | * learned as we could have traveled outside to another country | |
1965 | * after disconnection. To restore regulatory settings we do | |
1966 | * exactly what we did at bootup: | |
1967 | * | |
1968 | * - send a core regulatory hint | |
1969 | * - send a user regulatory hint if applicable | |
1970 | * | |
1971 | * Device drivers that send a regulatory hint for a specific country | |
1972 | * keep their own regulatory domain on wiphy->regd so that does does | |
1973 | * not need to be remembered. | |
1974 | */ | |
1975 | static void restore_regulatory_settings(bool reset_user) | |
1976 | { | |
1977 | char alpha2[2]; | |
cee0bec5 | 1978 | char world_alpha2[2]; |
09d989d1 | 1979 | struct reg_beacon *reg_beacon, *btmp; |
14609555 LR |
1980 | struct regulatory_request *reg_request, *tmp; |
1981 | LIST_HEAD(tmp_reg_req_list); | |
5ce543d1 | 1982 | struct cfg80211_registered_device *rdev; |
09d989d1 | 1983 | |
5fe231e8 JB |
1984 | ASSERT_RTNL(); |
1985 | ||
2d319867 | 1986 | reset_regdomains(true, &world_regdom); |
09d989d1 LR |
1987 | restore_alpha2(alpha2, reset_user); |
1988 | ||
14609555 LR |
1989 | /* |
1990 | * If there's any pending requests we simply | |
1991 | * stash them to a temporary pending queue and | |
1992 | * add then after we've restored regulatory | |
1993 | * settings. | |
1994 | */ | |
1995 | spin_lock(®_requests_lock); | |
fea9bced JB |
1996 | list_for_each_entry_safe(reg_request, tmp, ®_requests_list, list) { |
1997 | if (reg_request->initiator != NL80211_REGDOM_SET_BY_USER) | |
1998 | continue; | |
1999 | list_move_tail(®_request->list, &tmp_reg_req_list); | |
14609555 LR |
2000 | } |
2001 | spin_unlock(®_requests_lock); | |
2002 | ||
09d989d1 LR |
2003 | /* Clear beacon hints */ |
2004 | spin_lock_bh(®_pending_beacons_lock); | |
fea9bced JB |
2005 | list_for_each_entry_safe(reg_beacon, btmp, ®_pending_beacons, list) { |
2006 | list_del(®_beacon->list); | |
2007 | kfree(reg_beacon); | |
09d989d1 LR |
2008 | } |
2009 | spin_unlock_bh(®_pending_beacons_lock); | |
2010 | ||
fea9bced JB |
2011 | list_for_each_entry_safe(reg_beacon, btmp, ®_beacon_list, list) { |
2012 | list_del(®_beacon->list); | |
2013 | kfree(reg_beacon); | |
09d989d1 LR |
2014 | } |
2015 | ||
2016 | /* First restore to the basic regulatory settings */ | |
379b82f4 JB |
2017 | world_alpha2[0] = cfg80211_world_regdom->alpha2[0]; |
2018 | world_alpha2[1] = cfg80211_world_regdom->alpha2[1]; | |
09d989d1 | 2019 | |
5ce543d1 | 2020 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) { |
a2f73b6c | 2021 | if (rdev->wiphy.regulatory_flags & REGULATORY_CUSTOM_REG) |
5ce543d1 RM |
2022 | restore_custom_reg_settings(&rdev->wiphy); |
2023 | } | |
2024 | ||
cee0bec5 | 2025 | regulatory_hint_core(world_alpha2); |
09d989d1 LR |
2026 | |
2027 | /* | |
2028 | * This restores the ieee80211_regdom module parameter | |
2029 | * preference or the last user requested regulatory | |
2030 | * settings, user regulatory settings takes precedence. | |
2031 | */ | |
2032 | if (is_an_alpha2(alpha2)) | |
57b5ce07 | 2033 | regulatory_hint_user(user_alpha2, NL80211_USER_REG_HINT_USER); |
09d989d1 | 2034 | |
14609555 | 2035 | spin_lock(®_requests_lock); |
11cff96c | 2036 | list_splice_tail_init(&tmp_reg_req_list, ®_requests_list); |
14609555 LR |
2037 | spin_unlock(®_requests_lock); |
2038 | ||
14609555 LR |
2039 | REG_DBG_PRINT("Kicking the queue\n"); |
2040 | ||
2041 | schedule_work(®_work); | |
2042 | } | |
09d989d1 LR |
2043 | |
2044 | void regulatory_hint_disconnect(void) | |
2045 | { | |
1a919318 | 2046 | REG_DBG_PRINT("All devices are disconnected, going to restore regulatory settings\n"); |
09d989d1 LR |
2047 | restore_regulatory_settings(false); |
2048 | } | |
2049 | ||
e38f8a7a LR |
2050 | static bool freq_is_chan_12_13_14(u16 freq) |
2051 | { | |
59eb21a6 BR |
2052 | if (freq == ieee80211_channel_to_frequency(12, IEEE80211_BAND_2GHZ) || |
2053 | freq == ieee80211_channel_to_frequency(13, IEEE80211_BAND_2GHZ) || | |
2054 | freq == ieee80211_channel_to_frequency(14, IEEE80211_BAND_2GHZ)) | |
e38f8a7a LR |
2055 | return true; |
2056 | return false; | |
2057 | } | |
2058 | ||
3ebfa6e7 LR |
2059 | static bool pending_reg_beacon(struct ieee80211_channel *beacon_chan) |
2060 | { | |
2061 | struct reg_beacon *pending_beacon; | |
2062 | ||
2063 | list_for_each_entry(pending_beacon, ®_pending_beacons, list) | |
2064 | if (beacon_chan->center_freq == | |
2065 | pending_beacon->chan.center_freq) | |
2066 | return true; | |
2067 | return false; | |
2068 | } | |
2069 | ||
e38f8a7a LR |
2070 | int regulatory_hint_found_beacon(struct wiphy *wiphy, |
2071 | struct ieee80211_channel *beacon_chan, | |
2072 | gfp_t gfp) | |
2073 | { | |
2074 | struct reg_beacon *reg_beacon; | |
3ebfa6e7 | 2075 | bool processing; |
e38f8a7a | 2076 | |
1a919318 JB |
2077 | if (beacon_chan->beacon_found || |
2078 | beacon_chan->flags & IEEE80211_CHAN_RADAR || | |
e38f8a7a | 2079 | (beacon_chan->band == IEEE80211_BAND_2GHZ && |
1a919318 | 2080 | !freq_is_chan_12_13_14(beacon_chan->center_freq))) |
e38f8a7a LR |
2081 | return 0; |
2082 | ||
3ebfa6e7 LR |
2083 | spin_lock_bh(®_pending_beacons_lock); |
2084 | processing = pending_reg_beacon(beacon_chan); | |
2085 | spin_unlock_bh(®_pending_beacons_lock); | |
2086 | ||
2087 | if (processing) | |
e38f8a7a LR |
2088 | return 0; |
2089 | ||
2090 | reg_beacon = kzalloc(sizeof(struct reg_beacon), gfp); | |
2091 | if (!reg_beacon) | |
2092 | return -ENOMEM; | |
2093 | ||
1a919318 | 2094 | REG_DBG_PRINT("Found new beacon on frequency: %d MHz (Ch %d) on %s\n", |
4113f751 LR |
2095 | beacon_chan->center_freq, |
2096 | ieee80211_frequency_to_channel(beacon_chan->center_freq), | |
2097 | wiphy_name(wiphy)); | |
2098 | ||
e38f8a7a | 2099 | memcpy(®_beacon->chan, beacon_chan, |
1a919318 | 2100 | sizeof(struct ieee80211_channel)); |
e38f8a7a LR |
2101 | |
2102 | /* | |
2103 | * Since we can be called from BH or and non-BH context | |
2104 | * we must use spin_lock_bh() | |
2105 | */ | |
2106 | spin_lock_bh(®_pending_beacons_lock); | |
2107 | list_add_tail(®_beacon->list, ®_pending_beacons); | |
2108 | spin_unlock_bh(®_pending_beacons_lock); | |
2109 | ||
2110 | schedule_work(®_work); | |
2111 | ||
2112 | return 0; | |
2113 | } | |
2114 | ||
a3d2eaf0 | 2115 | static void print_rd_rules(const struct ieee80211_regdomain *rd) |
b2e1b302 LR |
2116 | { |
2117 | unsigned int i; | |
a3d2eaf0 JB |
2118 | const struct ieee80211_reg_rule *reg_rule = NULL; |
2119 | const struct ieee80211_freq_range *freq_range = NULL; | |
2120 | const struct ieee80211_power_rule *power_rule = NULL; | |
b2e1b302 | 2121 | |
6653325a | 2122 | pr_info(" (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)\n"); |
b2e1b302 LR |
2123 | |
2124 | for (i = 0; i < rd->n_reg_rules; i++) { | |
2125 | reg_rule = &rd->reg_rules[i]; | |
2126 | freq_range = ®_rule->freq_range; | |
2127 | power_rule = ®_rule->power_rule; | |
2128 | ||
fb1fc7ad LR |
2129 | /* |
2130 | * There may not be documentation for max antenna gain | |
2131 | * in certain regions | |
2132 | */ | |
b2e1b302 | 2133 | if (power_rule->max_antenna_gain) |
6653325a | 2134 | pr_info(" (%d KHz - %d KHz @ %d KHz), (%d mBi, %d mBm)\n", |
b2e1b302 LR |
2135 | freq_range->start_freq_khz, |
2136 | freq_range->end_freq_khz, | |
2137 | freq_range->max_bandwidth_khz, | |
2138 | power_rule->max_antenna_gain, | |
2139 | power_rule->max_eirp); | |
2140 | else | |
6653325a | 2141 | pr_info(" (%d KHz - %d KHz @ %d KHz), (N/A, %d mBm)\n", |
b2e1b302 LR |
2142 | freq_range->start_freq_khz, |
2143 | freq_range->end_freq_khz, | |
2144 | freq_range->max_bandwidth_khz, | |
2145 | power_rule->max_eirp); | |
2146 | } | |
2147 | } | |
2148 | ||
4c7d3982 | 2149 | bool reg_supported_dfs_region(enum nl80211_dfs_regions dfs_region) |
8b60b078 LR |
2150 | { |
2151 | switch (dfs_region) { | |
2152 | case NL80211_DFS_UNSET: | |
2153 | case NL80211_DFS_FCC: | |
2154 | case NL80211_DFS_ETSI: | |
2155 | case NL80211_DFS_JP: | |
2156 | return true; | |
2157 | default: | |
2158 | REG_DBG_PRINT("Ignoring uknown DFS master region: %d\n", | |
2159 | dfs_region); | |
2160 | return false; | |
2161 | } | |
2162 | } | |
2163 | ||
a3d2eaf0 | 2164 | static void print_regdomain(const struct ieee80211_regdomain *rd) |
b2e1b302 | 2165 | { |
c492db37 | 2166 | struct regulatory_request *lr = get_last_request(); |
b2e1b302 | 2167 | |
3f2355cb | 2168 | if (is_intersected_alpha2(rd->alpha2)) { |
c492db37 | 2169 | if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) { |
79c97e97 | 2170 | struct cfg80211_registered_device *rdev; |
c492db37 | 2171 | rdev = cfg80211_rdev_by_wiphy_idx(lr->wiphy_idx); |
79c97e97 | 2172 | if (rdev) { |
e9c0268f | 2173 | pr_info("Current regulatory domain updated by AP to: %c%c\n", |
79c97e97 JB |
2174 | rdev->country_ie_alpha2[0], |
2175 | rdev->country_ie_alpha2[1]); | |
3f2355cb | 2176 | } else |
e9c0268f | 2177 | pr_info("Current regulatory domain intersected:\n"); |
3f2355cb | 2178 | } else |
e9c0268f | 2179 | pr_info("Current regulatory domain intersected:\n"); |
1a919318 | 2180 | } else if (is_world_regdom(rd->alpha2)) { |
e9c0268f | 2181 | pr_info("World regulatory domain updated:\n"); |
1a919318 | 2182 | } else { |
b2e1b302 | 2183 | if (is_unknown_alpha2(rd->alpha2)) |
e9c0268f | 2184 | pr_info("Regulatory domain changed to driver built-in settings (unknown country)\n"); |
57b5ce07 | 2185 | else { |
c492db37 | 2186 | if (reg_request_cell_base(lr)) |
1a919318 | 2187 | pr_info("Regulatory domain changed to country: %c%c by Cell Station\n", |
57b5ce07 LR |
2188 | rd->alpha2[0], rd->alpha2[1]); |
2189 | else | |
1a919318 | 2190 | pr_info("Regulatory domain changed to country: %c%c\n", |
57b5ce07 LR |
2191 | rd->alpha2[0], rd->alpha2[1]); |
2192 | } | |
b2e1b302 | 2193 | } |
1a919318 | 2194 | |
3ef121b5 | 2195 | pr_info(" DFS Master region: %s", reg_dfs_region_str(rd->dfs_region)); |
b2e1b302 LR |
2196 | print_rd_rules(rd); |
2197 | } | |
2198 | ||
2df78167 | 2199 | static void print_regdomain_info(const struct ieee80211_regdomain *rd) |
b2e1b302 | 2200 | { |
e9c0268f | 2201 | pr_info("Regulatory domain: %c%c\n", rd->alpha2[0], rd->alpha2[1]); |
b2e1b302 LR |
2202 | print_rd_rules(rd); |
2203 | } | |
2204 | ||
3b9e5aca LR |
2205 | static int reg_set_rd_core(const struct ieee80211_regdomain *rd) |
2206 | { | |
2207 | if (!is_world_regdom(rd->alpha2)) | |
2208 | return -EINVAL; | |
2209 | update_world_regdomain(rd); | |
2210 | return 0; | |
2211 | } | |
2212 | ||
84721d44 LR |
2213 | static int reg_set_rd_user(const struct ieee80211_regdomain *rd, |
2214 | struct regulatory_request *user_request) | |
2215 | { | |
2216 | const struct ieee80211_regdomain *intersected_rd = NULL; | |
2217 | ||
2218 | if (is_world_regdom(rd->alpha2)) | |
2219 | return -EINVAL; | |
2220 | ||
2221 | if (!regdom_changes(rd->alpha2)) | |
2222 | return -EALREADY; | |
2223 | ||
2224 | if (!is_valid_rd(rd)) { | |
2225 | pr_err("Invalid regulatory domain detected:\n"); | |
2226 | print_regdomain_info(rd); | |
2227 | return -EINVAL; | |
2228 | } | |
2229 | ||
2230 | if (!user_request->intersect) { | |
2231 | reset_regdomains(false, rd); | |
2232 | return 0; | |
2233 | } | |
2234 | ||
2235 | intersected_rd = regdom_intersect(rd, get_cfg80211_regdom()); | |
2236 | if (!intersected_rd) | |
2237 | return -EINVAL; | |
2238 | ||
2239 | kfree(rd); | |
2240 | rd = NULL; | |
2241 | reset_regdomains(false, intersected_rd); | |
2242 | ||
2243 | return 0; | |
2244 | } | |
2245 | ||
f5fe3247 LR |
2246 | static int reg_set_rd_driver(const struct ieee80211_regdomain *rd, |
2247 | struct regulatory_request *driver_request) | |
b2e1b302 | 2248 | { |
e9763c3c | 2249 | const struct ieee80211_regdomain *regd; |
9c96477d | 2250 | const struct ieee80211_regdomain *intersected_rd = NULL; |
f5fe3247 | 2251 | const struct ieee80211_regdomain *tmp; |
806a9e39 | 2252 | struct wiphy *request_wiphy; |
6913b49a | 2253 | |
f5fe3247 | 2254 | if (is_world_regdom(rd->alpha2)) |
b2e1b302 LR |
2255 | return -EINVAL; |
2256 | ||
f5fe3247 LR |
2257 | if (!regdom_changes(rd->alpha2)) |
2258 | return -EALREADY; | |
b2e1b302 | 2259 | |
8375af3b | 2260 | if (!is_valid_rd(rd)) { |
e9c0268f | 2261 | pr_err("Invalid regulatory domain detected:\n"); |
8375af3b LR |
2262 | print_regdomain_info(rd); |
2263 | return -EINVAL; | |
b2e1b302 LR |
2264 | } |
2265 | ||
f5fe3247 LR |
2266 | request_wiphy = wiphy_idx_to_wiphy(driver_request->wiphy_idx); |
2267 | if (!request_wiphy) { | |
0bac71af | 2268 | schedule_delayed_work(®_timeout, 0); |
de3584bd JB |
2269 | return -ENODEV; |
2270 | } | |
806a9e39 | 2271 | |
f5fe3247 | 2272 | if (!driver_request->intersect) { |
558f6d32 LR |
2273 | if (request_wiphy->regd) |
2274 | return -EALREADY; | |
3e0c3ff3 | 2275 | |
e9763c3c JB |
2276 | regd = reg_copy_regd(rd); |
2277 | if (IS_ERR(regd)) | |
2278 | return PTR_ERR(regd); | |
3e0c3ff3 | 2279 | |
458f4f9e | 2280 | rcu_assign_pointer(request_wiphy->regd, regd); |
379b82f4 | 2281 | reset_regdomains(false, rd); |
b8295acd LR |
2282 | return 0; |
2283 | } | |
2284 | ||
f5fe3247 LR |
2285 | intersected_rd = regdom_intersect(rd, get_cfg80211_regdom()); |
2286 | if (!intersected_rd) | |
2287 | return -EINVAL; | |
b8295acd | 2288 | |
f5fe3247 LR |
2289 | /* |
2290 | * We can trash what CRDA provided now. | |
2291 | * However if a driver requested this specific regulatory | |
2292 | * domain we keep it for its private use | |
2293 | */ | |
2294 | tmp = get_wiphy_regdom(request_wiphy); | |
2295 | rcu_assign_pointer(request_wiphy->regd, rd); | |
2296 | rcu_free_regdom(tmp); | |
b8295acd | 2297 | |
f5fe3247 | 2298 | rd = NULL; |
b7566fc3 | 2299 | |
f5fe3247 | 2300 | reset_regdomains(false, intersected_rd); |
3e0c3ff3 | 2301 | |
f5fe3247 LR |
2302 | return 0; |
2303 | } | |
2304 | ||
01992406 LR |
2305 | static int reg_set_rd_country_ie(const struct ieee80211_regdomain *rd, |
2306 | struct regulatory_request *country_ie_request) | |
f5fe3247 LR |
2307 | { |
2308 | struct wiphy *request_wiphy; | |
b8295acd | 2309 | |
f5fe3247 LR |
2310 | if (!is_alpha2_set(rd->alpha2) && !is_an_alpha2(rd->alpha2) && |
2311 | !is_unknown_alpha2(rd->alpha2)) | |
2312 | return -EINVAL; | |
b8295acd | 2313 | |
f5fe3247 LR |
2314 | /* |
2315 | * Lets only bother proceeding on the same alpha2 if the current | |
2316 | * rd is non static (it means CRDA was present and was used last) | |
2317 | * and the pending request came in from a country IE | |
2318 | */ | |
2319 | ||
2320 | if (!is_valid_rd(rd)) { | |
2321 | pr_err("Invalid regulatory domain detected:\n"); | |
2322 | print_regdomain_info(rd); | |
2323 | return -EINVAL; | |
9c96477d LR |
2324 | } |
2325 | ||
01992406 | 2326 | request_wiphy = wiphy_idx_to_wiphy(country_ie_request->wiphy_idx); |
f5fe3247 LR |
2327 | if (!request_wiphy) { |
2328 | schedule_delayed_work(®_timeout, 0); | |
2329 | return -ENODEV; | |
2330 | } | |
b2e1b302 | 2331 | |
01992406 | 2332 | if (country_ie_request->intersect) |
f5fe3247 LR |
2333 | return -EINVAL; |
2334 | ||
2335 | reset_regdomains(false, rd); | |
2336 | return 0; | |
2337 | } | |
b2e1b302 | 2338 | |
fb1fc7ad LR |
2339 | /* |
2340 | * Use this call to set the current regulatory domain. Conflicts with | |
b2e1b302 | 2341 | * multiple drivers can be ironed out later. Caller must've already |
458f4f9e | 2342 | * kmalloc'd the rd structure. |
fb1fc7ad | 2343 | */ |
a3d2eaf0 | 2344 | int set_regdom(const struct ieee80211_regdomain *rd) |
b2e1b302 | 2345 | { |
c492db37 | 2346 | struct regulatory_request *lr; |
b2e1b302 LR |
2347 | int r; |
2348 | ||
3b9e5aca LR |
2349 | if (!reg_is_valid_request(rd->alpha2)) { |
2350 | kfree(rd); | |
2351 | return -EINVAL; | |
2352 | } | |
2353 | ||
c492db37 | 2354 | lr = get_last_request(); |
abc7381b | 2355 | |
b2e1b302 | 2356 | /* Note that this doesn't update the wiphys, this is done below */ |
3b9e5aca LR |
2357 | switch (lr->initiator) { |
2358 | case NL80211_REGDOM_SET_BY_CORE: | |
2359 | r = reg_set_rd_core(rd); | |
2360 | break; | |
2361 | case NL80211_REGDOM_SET_BY_USER: | |
84721d44 LR |
2362 | r = reg_set_rd_user(rd, lr); |
2363 | break; | |
3b9e5aca | 2364 | case NL80211_REGDOM_SET_BY_DRIVER: |
f5fe3247 LR |
2365 | r = reg_set_rd_driver(rd, lr); |
2366 | break; | |
3b9e5aca | 2367 | case NL80211_REGDOM_SET_BY_COUNTRY_IE: |
01992406 | 2368 | r = reg_set_rd_country_ie(rd, lr); |
3b9e5aca LR |
2369 | break; |
2370 | default: | |
2371 | WARN(1, "invalid initiator %d\n", lr->initiator); | |
2372 | return -EINVAL; | |
2373 | } | |
2374 | ||
d2372b31 | 2375 | if (r) { |
95908535 KV |
2376 | if (r == -EALREADY) |
2377 | reg_set_request_processed(); | |
2378 | ||
d2372b31 | 2379 | kfree(rd); |
38fd2143 | 2380 | return r; |
d2372b31 | 2381 | } |
b2e1b302 | 2382 | |
b2e1b302 | 2383 | /* This would make this whole thing pointless */ |
38fd2143 JB |
2384 | if (WARN_ON(!lr->intersect && rd != get_cfg80211_regdom())) |
2385 | return -EINVAL; | |
b2e1b302 LR |
2386 | |
2387 | /* update all wiphys now with the new established regulatory domain */ | |
c492db37 | 2388 | update_all_wiphy_regulatory(lr->initiator); |
b2e1b302 | 2389 | |
458f4f9e | 2390 | print_regdomain(get_cfg80211_regdom()); |
b2e1b302 | 2391 | |
c492db37 | 2392 | nl80211_send_reg_change_event(lr); |
73d54c9e | 2393 | |
b2e253cf LR |
2394 | reg_set_request_processed(); |
2395 | ||
38fd2143 | 2396 | return 0; |
b2e1b302 LR |
2397 | } |
2398 | ||
4d9d88d1 SJR |
2399 | int reg_device_uevent(struct device *dev, struct kobj_uevent_env *env) |
2400 | { | |
4a484cff JB |
2401 | struct regulatory_request *lr; |
2402 | u8 alpha2[2]; | |
2403 | bool add = false; | |
c492db37 | 2404 | |
4a484cff JB |
2405 | rcu_read_lock(); |
2406 | lr = get_last_request(); | |
c492db37 | 2407 | if (lr && !lr->processed) { |
4a484cff JB |
2408 | memcpy(alpha2, lr->alpha2, 2); |
2409 | add = true; | |
4d9d88d1 | 2410 | } |
4a484cff | 2411 | rcu_read_unlock(); |
4d9d88d1 | 2412 | |
4a484cff JB |
2413 | if (add) |
2414 | return add_uevent_var(env, "COUNTRY=%c%c", | |
2415 | alpha2[0], alpha2[1]); | |
4d9d88d1 SJR |
2416 | return 0; |
2417 | } | |
4d9d88d1 | 2418 | |
57b5ce07 LR |
2419 | void wiphy_regulatory_register(struct wiphy *wiphy) |
2420 | { | |
23df0b73 AN |
2421 | struct regulatory_request *lr; |
2422 | ||
57b5ce07 LR |
2423 | if (!reg_dev_ignore_cell_hint(wiphy)) |
2424 | reg_num_devs_support_basehint++; | |
2425 | ||
23df0b73 AN |
2426 | lr = get_last_request(); |
2427 | wiphy_update_regulatory(wiphy, lr->initiator); | |
57b5ce07 LR |
2428 | } |
2429 | ||
bfead080 | 2430 | void wiphy_regulatory_deregister(struct wiphy *wiphy) |
3f2355cb | 2431 | { |
0ad8acaf | 2432 | struct wiphy *request_wiphy = NULL; |
c492db37 | 2433 | struct regulatory_request *lr; |
761cf7ec | 2434 | |
c492db37 | 2435 | lr = get_last_request(); |
abc7381b | 2436 | |
57b5ce07 LR |
2437 | if (!reg_dev_ignore_cell_hint(wiphy)) |
2438 | reg_num_devs_support_basehint--; | |
2439 | ||
458f4f9e JB |
2440 | rcu_free_regdom(get_wiphy_regdom(wiphy)); |
2441 | rcu_assign_pointer(wiphy->regd, NULL); | |
0ef9ccdd | 2442 | |
c492db37 JB |
2443 | if (lr) |
2444 | request_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx); | |
806a9e39 | 2445 | |
0ef9ccdd | 2446 | if (!request_wiphy || request_wiphy != wiphy) |
38fd2143 | 2447 | return; |
0ef9ccdd | 2448 | |
c492db37 JB |
2449 | lr->wiphy_idx = WIPHY_IDX_INVALID; |
2450 | lr->country_ie_env = ENVIRON_ANY; | |
3f2355cb LR |
2451 | } |
2452 | ||
a90c7a31 LR |
2453 | static void reg_timeout_work(struct work_struct *work) |
2454 | { | |
1a919318 | 2455 | REG_DBG_PRINT("Timeout while waiting for CRDA to reply, restoring regulatory settings\n"); |
f77b86d7 | 2456 | rtnl_lock(); |
a90c7a31 | 2457 | restore_regulatory_settings(true); |
f77b86d7 | 2458 | rtnl_unlock(); |
a90c7a31 LR |
2459 | } |
2460 | ||
2fcc9f73 | 2461 | int __init regulatory_init(void) |
b2e1b302 | 2462 | { |
bcf4f99b | 2463 | int err = 0; |
734366de | 2464 | |
b2e1b302 LR |
2465 | reg_pdev = platform_device_register_simple("regulatory", 0, NULL, 0); |
2466 | if (IS_ERR(reg_pdev)) | |
2467 | return PTR_ERR(reg_pdev); | |
734366de | 2468 | |
4d9d88d1 SJR |
2469 | reg_pdev->dev.type = ®_device_type; |
2470 | ||
fe33eb39 | 2471 | spin_lock_init(®_requests_lock); |
e38f8a7a | 2472 | spin_lock_init(®_pending_beacons_lock); |
fe33eb39 | 2473 | |
80007efe LR |
2474 | reg_regdb_size_check(); |
2475 | ||
458f4f9e | 2476 | rcu_assign_pointer(cfg80211_regdomain, cfg80211_world_regdom); |
734366de | 2477 | |
09d989d1 LR |
2478 | user_alpha2[0] = '9'; |
2479 | user_alpha2[1] = '7'; | |
2480 | ||
ae9e4b0d | 2481 | /* We always try to get an update for the static regdomain */ |
458f4f9e | 2482 | err = regulatory_hint_core(cfg80211_world_regdom->alpha2); |
ba25c141 | 2483 | if (err) { |
bcf4f99b LR |
2484 | if (err == -ENOMEM) |
2485 | return err; | |
2486 | /* | |
2487 | * N.B. kobject_uevent_env() can fail mainly for when we're out | |
2488 | * memory which is handled and propagated appropriately above | |
2489 | * but it can also fail during a netlink_broadcast() or during | |
2490 | * early boot for call_usermodehelper(). For now treat these | |
2491 | * errors as non-fatal. | |
2492 | */ | |
e9c0268f | 2493 | pr_err("kobject_uevent_env() was unable to call CRDA during init\n"); |
bcf4f99b | 2494 | } |
734366de | 2495 | |
ae9e4b0d LR |
2496 | /* |
2497 | * Finally, if the user set the module parameter treat it | |
2498 | * as a user hint. | |
2499 | */ | |
2500 | if (!is_world_regdom(ieee80211_regdom)) | |
57b5ce07 LR |
2501 | regulatory_hint_user(ieee80211_regdom, |
2502 | NL80211_USER_REG_HINT_USER); | |
ae9e4b0d | 2503 | |
b2e1b302 LR |
2504 | return 0; |
2505 | } | |
2506 | ||
1a919318 | 2507 | void regulatory_exit(void) |
b2e1b302 | 2508 | { |
fe33eb39 | 2509 | struct regulatory_request *reg_request, *tmp; |
e38f8a7a | 2510 | struct reg_beacon *reg_beacon, *btmp; |
fe33eb39 LR |
2511 | |
2512 | cancel_work_sync(®_work); | |
a90c7a31 | 2513 | cancel_delayed_work_sync(®_timeout); |
fe33eb39 | 2514 | |
9027b149 | 2515 | /* Lock to suppress warnings */ |
38fd2143 | 2516 | rtnl_lock(); |
379b82f4 | 2517 | reset_regdomains(true, NULL); |
38fd2143 | 2518 | rtnl_unlock(); |
734366de | 2519 | |
58ebacc6 | 2520 | dev_set_uevent_suppress(®_pdev->dev, true); |
f6037d09 | 2521 | |
b2e1b302 | 2522 | platform_device_unregister(reg_pdev); |
734366de | 2523 | |
fea9bced JB |
2524 | list_for_each_entry_safe(reg_beacon, btmp, ®_pending_beacons, list) { |
2525 | list_del(®_beacon->list); | |
2526 | kfree(reg_beacon); | |
e38f8a7a | 2527 | } |
e38f8a7a | 2528 | |
fea9bced JB |
2529 | list_for_each_entry_safe(reg_beacon, btmp, ®_beacon_list, list) { |
2530 | list_del(®_beacon->list); | |
2531 | kfree(reg_beacon); | |
e38f8a7a LR |
2532 | } |
2533 | ||
fea9bced JB |
2534 | list_for_each_entry_safe(reg_request, tmp, ®_requests_list, list) { |
2535 | list_del(®_request->list); | |
2536 | kfree(reg_request); | |
fe33eb39 | 2537 | } |
8318d78a | 2538 | } |