Commit | Line | Data |
---|---|---|
8318d78a JB |
1 | /* |
2 | * Copyright 2002-2005, Instant802 Networks, Inc. | |
3 | * Copyright 2005-2006, Devicescape Software, Inc. | |
4 | * Copyright 2007 Johannes Berg <johannes@sipsolutions.net> | |
3b77d5ec | 5 | * Copyright 2008-2011 Luis R. Rodriguez <mcgrof@qca.qualcomm.com> |
8318d78a | 6 | * |
3b77d5ec LR |
7 | * Permission to use, copy, modify, and/or distribute this software for any |
8 | * purpose with or without fee is hereby granted, provided that the above | |
9 | * copyright notice and this permission notice appear in all copies. | |
10 | * | |
11 | * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES | |
12 | * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF | |
13 | * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR | |
14 | * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES | |
15 | * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN | |
16 | * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF | |
17 | * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. | |
8318d78a JB |
18 | */ |
19 | ||
3b77d5ec | 20 | |
b2e1b302 LR |
21 | /** |
22 | * DOC: Wireless regulatory infrastructure | |
8318d78a JB |
23 | * |
24 | * The usual implementation is for a driver to read a device EEPROM to | |
25 | * determine which regulatory domain it should be operating under, then | |
26 | * looking up the allowable channels in a driver-local table and finally | |
27 | * registering those channels in the wiphy structure. | |
28 | * | |
b2e1b302 LR |
29 | * Another set of compliance enforcement is for drivers to use their |
30 | * own compliance limits which can be stored on the EEPROM. The host | |
31 | * driver or firmware may ensure these are used. | |
32 | * | |
33 | * In addition to all this we provide an extra layer of regulatory | |
34 | * conformance. For drivers which do not have any regulatory | |
35 | * information CRDA provides the complete regulatory solution. | |
36 | * For others it provides a community effort on further restrictions | |
37 | * to enhance compliance. | |
38 | * | |
39 | * Note: When number of rules --> infinity we will not be able to | |
40 | * index on alpha2 any more, instead we'll probably have to | |
41 | * rely on some SHA1 checksum of the regdomain for example. | |
42 | * | |
8318d78a | 43 | */ |
e9c0268f JP |
44 | |
45 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt | |
46 | ||
8318d78a | 47 | #include <linux/kernel.h> |
bc3b2d7f | 48 | #include <linux/export.h> |
5a0e3ad6 | 49 | #include <linux/slab.h> |
b2e1b302 | 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 | ||
52616f2b IP |
68 | /** |
69 | * enum reg_request_treatment - regulatory request treatment | |
70 | * | |
71 | * @REG_REQ_OK: continue processing the regulatory request | |
72 | * @REG_REQ_IGNORE: ignore the regulatory request | |
73 | * @REG_REQ_INTERSECT: the regulatory domain resulting from this request should | |
74 | * be intersected with the current one. | |
75 | * @REG_REQ_ALREADY_SET: the regulatory request will not change the current | |
76 | * regulatory settings, and no further processing is required. | |
77 | * @REG_REQ_USER_HINT_HANDLED: a non alpha2 user hint was handled and no | |
78 | * further processing is required, i.e., not need to update last_request | |
79 | * etc. This should be used for user hints that do not provide an alpha2 | |
80 | * but some other type of regulatory hint, i.e., indoor operation. | |
81 | */ | |
2f92212b JB |
82 | enum reg_request_treatment { |
83 | REG_REQ_OK, | |
84 | REG_REQ_IGNORE, | |
85 | REG_REQ_INTERSECT, | |
86 | REG_REQ_ALREADY_SET, | |
52616f2b | 87 | REG_REQ_USER_HINT_HANDLED, |
2f92212b JB |
88 | }; |
89 | ||
a042994d LR |
90 | static struct regulatory_request core_request_world = { |
91 | .initiator = NL80211_REGDOM_SET_BY_CORE, | |
92 | .alpha2[0] = '0', | |
93 | .alpha2[1] = '0', | |
94 | .intersect = false, | |
95 | .processed = true, | |
96 | .country_ie_env = ENVIRON_ANY, | |
97 | }; | |
98 | ||
38fd2143 JB |
99 | /* |
100 | * Receipt of information from last regulatory request, | |
101 | * protected by RTNL (and can be accessed with RCU protection) | |
102 | */ | |
c492db37 JB |
103 | static struct regulatory_request __rcu *last_request = |
104 | (void __rcu *)&core_request_world; | |
734366de | 105 | |
b2e1b302 LR |
106 | /* To trigger userspace events */ |
107 | static struct platform_device *reg_pdev; | |
8318d78a | 108 | |
fb1fc7ad LR |
109 | /* |
110 | * Central wireless core regulatory domains, we only need two, | |
734366de | 111 | * the current one and a world regulatory domain in case we have no |
e8da2bb4 | 112 | * information to give us an alpha2. |
38fd2143 | 113 | * (protected by RTNL, can be read under RCU) |
fb1fc7ad | 114 | */ |
458f4f9e | 115 | const struct ieee80211_regdomain __rcu *cfg80211_regdomain; |
734366de | 116 | |
57b5ce07 LR |
117 | /* |
118 | * Number of devices that registered to the core | |
119 | * that support cellular base station regulatory hints | |
38fd2143 | 120 | * (protected by RTNL) |
57b5ce07 LR |
121 | */ |
122 | static int reg_num_devs_support_basehint; | |
123 | ||
52616f2b IP |
124 | /* |
125 | * State variable indicating if the platform on which the devices | |
126 | * are attached is operating in an indoor environment. The state variable | |
127 | * is relevant for all registered devices. | |
128 | * (protected by RTNL) | |
129 | */ | |
130 | static bool reg_is_indoor; | |
131 | ||
458f4f9e JB |
132 | static const struct ieee80211_regdomain *get_cfg80211_regdom(void) |
133 | { | |
38fd2143 | 134 | return rtnl_dereference(cfg80211_regdomain); |
458f4f9e JB |
135 | } |
136 | ||
137 | static const struct ieee80211_regdomain *get_wiphy_regdom(struct wiphy *wiphy) | |
138 | { | |
38fd2143 | 139 | return rtnl_dereference(wiphy->regd); |
458f4f9e JB |
140 | } |
141 | ||
3ef121b5 LR |
142 | static const char *reg_dfs_region_str(enum nl80211_dfs_regions dfs_region) |
143 | { | |
144 | switch (dfs_region) { | |
145 | case NL80211_DFS_UNSET: | |
146 | return "unset"; | |
147 | case NL80211_DFS_FCC: | |
148 | return "FCC"; | |
149 | case NL80211_DFS_ETSI: | |
150 | return "ETSI"; | |
151 | case NL80211_DFS_JP: | |
152 | return "JP"; | |
153 | } | |
154 | return "Unknown"; | |
155 | } | |
156 | ||
6c474799 LR |
157 | enum nl80211_dfs_regions reg_get_dfs_region(struct wiphy *wiphy) |
158 | { | |
159 | const struct ieee80211_regdomain *regd = NULL; | |
160 | const struct ieee80211_regdomain *wiphy_regd = NULL; | |
161 | ||
162 | regd = get_cfg80211_regdom(); | |
163 | if (!wiphy) | |
164 | goto out; | |
165 | ||
166 | wiphy_regd = get_wiphy_regdom(wiphy); | |
167 | if (!wiphy_regd) | |
168 | goto out; | |
169 | ||
170 | if (wiphy_regd->dfs_region == regd->dfs_region) | |
171 | goto out; | |
172 | ||
173 | REG_DBG_PRINT("%s: device specific dfs_region " | |
174 | "(%s) disagrees with cfg80211's " | |
175 | "central dfs_region (%s)\n", | |
176 | dev_name(&wiphy->dev), | |
177 | reg_dfs_region_str(wiphy_regd->dfs_region), | |
178 | reg_dfs_region_str(regd->dfs_region)); | |
179 | ||
180 | out: | |
181 | return regd->dfs_region; | |
182 | } | |
183 | ||
458f4f9e JB |
184 | static void rcu_free_regdom(const struct ieee80211_regdomain *r) |
185 | { | |
186 | if (!r) | |
187 | return; | |
188 | kfree_rcu((struct ieee80211_regdomain *)r, rcu_head); | |
189 | } | |
190 | ||
c492db37 JB |
191 | static struct regulatory_request *get_last_request(void) |
192 | { | |
38fd2143 | 193 | return rcu_dereference_rtnl(last_request); |
c492db37 JB |
194 | } |
195 | ||
e38f8a7a | 196 | /* Used to queue up regulatory hints */ |
fe33eb39 LR |
197 | static LIST_HEAD(reg_requests_list); |
198 | static spinlock_t reg_requests_lock; | |
199 | ||
e38f8a7a LR |
200 | /* Used to queue up beacon hints for review */ |
201 | static LIST_HEAD(reg_pending_beacons); | |
202 | static spinlock_t reg_pending_beacons_lock; | |
203 | ||
204 | /* Used to keep track of processed beacon hints */ | |
205 | static LIST_HEAD(reg_beacon_list); | |
206 | ||
207 | struct reg_beacon { | |
208 | struct list_head list; | |
209 | struct ieee80211_channel chan; | |
210 | }; | |
211 | ||
f333a7a2 LR |
212 | static void reg_todo(struct work_struct *work); |
213 | static DECLARE_WORK(reg_work, reg_todo); | |
214 | ||
a90c7a31 LR |
215 | static void reg_timeout_work(struct work_struct *work); |
216 | static DECLARE_DELAYED_WORK(reg_timeout, reg_timeout_work); | |
217 | ||
734366de JB |
218 | /* We keep a static world regulatory domain in case of the absence of CRDA */ |
219 | static const struct ieee80211_regdomain world_regdom = { | |
90cdc6df | 220 | .n_reg_rules = 6, |
734366de JB |
221 | .alpha2 = "00", |
222 | .reg_rules = { | |
68798a62 LR |
223 | /* IEEE 802.11b/g, channels 1..11 */ |
224 | REG_RULE(2412-10, 2462+10, 40, 6, 20, 0), | |
43c771a1 JB |
225 | /* IEEE 802.11b/g, channels 12..13. */ |
226 | REG_RULE(2467-10, 2472+10, 40, 6, 20, | |
8fe02e16 | 227 | NL80211_RRF_NO_IR), |
611b6a82 LR |
228 | /* IEEE 802.11 channel 14 - Only JP enables |
229 | * this and for 802.11b only */ | |
230 | REG_RULE(2484-10, 2484+10, 20, 6, 20, | |
8fe02e16 | 231 | NL80211_RRF_NO_IR | |
611b6a82 LR |
232 | NL80211_RRF_NO_OFDM), |
233 | /* IEEE 802.11a, channel 36..48 */ | |
131a19bc | 234 | REG_RULE(5180-10, 5240+10, 160, 6, 20, |
8fe02e16 | 235 | NL80211_RRF_NO_IR), |
3fc71f77 | 236 | |
131a19bc JB |
237 | /* IEEE 802.11a, channel 52..64 - DFS required */ |
238 | REG_RULE(5260-10, 5320+10, 160, 6, 20, | |
8fe02e16 | 239 | NL80211_RRF_NO_IR | |
131a19bc JB |
240 | NL80211_RRF_DFS), |
241 | ||
242 | /* IEEE 802.11a, channel 100..144 - DFS required */ | |
243 | REG_RULE(5500-10, 5720+10, 160, 6, 20, | |
8fe02e16 | 244 | NL80211_RRF_NO_IR | |
131a19bc | 245 | NL80211_RRF_DFS), |
3fc71f77 LR |
246 | |
247 | /* IEEE 802.11a, channel 149..165 */ | |
8ab9d85c | 248 | REG_RULE(5745-10, 5825+10, 80, 6, 20, |
8fe02e16 | 249 | NL80211_RRF_NO_IR), |
90cdc6df VK |
250 | |
251 | /* IEEE 802.11ad (60gHz), channels 1..3 */ | |
252 | REG_RULE(56160+2160*1-1080, 56160+2160*3+1080, 2160, 0, 0, 0), | |
734366de JB |
253 | } |
254 | }; | |
255 | ||
38fd2143 | 256 | /* protected by RTNL */ |
a3d2eaf0 JB |
257 | static const struct ieee80211_regdomain *cfg80211_world_regdom = |
258 | &world_regdom; | |
734366de | 259 | |
6ee7d330 | 260 | static char *ieee80211_regdom = "00"; |
09d989d1 | 261 | static char user_alpha2[2]; |
6ee7d330 | 262 | |
734366de JB |
263 | module_param(ieee80211_regdom, charp, 0444); |
264 | MODULE_PARM_DESC(ieee80211_regdom, "IEEE 802.11 regulatory domain code"); | |
265 | ||
255e25b0 | 266 | static void reg_free_request(struct regulatory_request *lr) |
5ad6ef5e | 267 | { |
5ad6ef5e LR |
268 | if (lr != &core_request_world && lr) |
269 | kfree_rcu(lr, rcu_head); | |
270 | } | |
271 | ||
05f1a3ea LR |
272 | static void reg_update_last_request(struct regulatory_request *request) |
273 | { | |
255e25b0 LR |
274 | struct regulatory_request *lr; |
275 | ||
276 | lr = get_last_request(); | |
277 | if (lr == request) | |
278 | return; | |
279 | ||
280 | reg_free_request(lr); | |
05f1a3ea LR |
281 | rcu_assign_pointer(last_request, request); |
282 | } | |
283 | ||
379b82f4 JB |
284 | static void reset_regdomains(bool full_reset, |
285 | const struct ieee80211_regdomain *new_regdom) | |
734366de | 286 | { |
458f4f9e JB |
287 | const struct ieee80211_regdomain *r; |
288 | ||
38fd2143 | 289 | ASSERT_RTNL(); |
e8da2bb4 | 290 | |
458f4f9e JB |
291 | r = get_cfg80211_regdom(); |
292 | ||
942b25cf | 293 | /* avoid freeing static information or freeing something twice */ |
458f4f9e JB |
294 | if (r == cfg80211_world_regdom) |
295 | r = NULL; | |
942b25cf JB |
296 | if (cfg80211_world_regdom == &world_regdom) |
297 | cfg80211_world_regdom = NULL; | |
458f4f9e JB |
298 | if (r == &world_regdom) |
299 | r = NULL; | |
942b25cf | 300 | |
458f4f9e JB |
301 | rcu_free_regdom(r); |
302 | rcu_free_regdom(cfg80211_world_regdom); | |
734366de | 303 | |
a3d2eaf0 | 304 | cfg80211_world_regdom = &world_regdom; |
458f4f9e | 305 | rcu_assign_pointer(cfg80211_regdomain, new_regdom); |
a042994d LR |
306 | |
307 | if (!full_reset) | |
308 | return; | |
309 | ||
05f1a3ea | 310 | reg_update_last_request(&core_request_world); |
734366de JB |
311 | } |
312 | ||
fb1fc7ad LR |
313 | /* |
314 | * Dynamic world regulatory domain requested by the wireless | |
315 | * core upon initialization | |
316 | */ | |
a3d2eaf0 | 317 | static void update_world_regdomain(const struct ieee80211_regdomain *rd) |
734366de | 318 | { |
c492db37 | 319 | struct regulatory_request *lr; |
734366de | 320 | |
c492db37 JB |
321 | lr = get_last_request(); |
322 | ||
323 | WARN_ON(!lr); | |
734366de | 324 | |
379b82f4 | 325 | reset_regdomains(false, rd); |
734366de JB |
326 | |
327 | cfg80211_world_regdom = rd; | |
734366de | 328 | } |
734366de | 329 | |
a3d2eaf0 | 330 | bool is_world_regdom(const char *alpha2) |
b2e1b302 LR |
331 | { |
332 | if (!alpha2) | |
333 | return false; | |
1a919318 | 334 | return alpha2[0] == '0' && alpha2[1] == '0'; |
b2e1b302 | 335 | } |
8318d78a | 336 | |
a3d2eaf0 | 337 | static bool is_alpha2_set(const char *alpha2) |
b2e1b302 LR |
338 | { |
339 | if (!alpha2) | |
340 | return false; | |
1a919318 | 341 | return alpha2[0] && alpha2[1]; |
b2e1b302 | 342 | } |
8318d78a | 343 | |
a3d2eaf0 | 344 | static bool is_unknown_alpha2(const char *alpha2) |
b2e1b302 LR |
345 | { |
346 | if (!alpha2) | |
347 | return false; | |
fb1fc7ad LR |
348 | /* |
349 | * Special case where regulatory domain was built by driver | |
350 | * but a specific alpha2 cannot be determined | |
351 | */ | |
1a919318 | 352 | return alpha2[0] == '9' && alpha2[1] == '9'; |
b2e1b302 | 353 | } |
8318d78a | 354 | |
3f2355cb LR |
355 | static bool is_intersected_alpha2(const char *alpha2) |
356 | { | |
357 | if (!alpha2) | |
358 | return false; | |
fb1fc7ad LR |
359 | /* |
360 | * Special case where regulatory domain is the | |
3f2355cb | 361 | * result of an intersection between two regulatory domain |
fb1fc7ad LR |
362 | * structures |
363 | */ | |
1a919318 | 364 | return alpha2[0] == '9' && alpha2[1] == '8'; |
3f2355cb LR |
365 | } |
366 | ||
a3d2eaf0 | 367 | static bool is_an_alpha2(const char *alpha2) |
b2e1b302 LR |
368 | { |
369 | if (!alpha2) | |
370 | return false; | |
1a919318 | 371 | return isalpha(alpha2[0]) && isalpha(alpha2[1]); |
b2e1b302 | 372 | } |
8318d78a | 373 | |
a3d2eaf0 | 374 | static bool alpha2_equal(const char *alpha2_x, const char *alpha2_y) |
b2e1b302 LR |
375 | { |
376 | if (!alpha2_x || !alpha2_y) | |
377 | return false; | |
1a919318 | 378 | return alpha2_x[0] == alpha2_y[0] && alpha2_x[1] == alpha2_y[1]; |
b2e1b302 LR |
379 | } |
380 | ||
69b1572b | 381 | static bool regdom_changes(const char *alpha2) |
b2e1b302 | 382 | { |
458f4f9e | 383 | const struct ieee80211_regdomain *r = get_cfg80211_regdom(); |
761cf7ec | 384 | |
458f4f9e | 385 | if (!r) |
b2e1b302 | 386 | return true; |
458f4f9e | 387 | return !alpha2_equal(r->alpha2, alpha2); |
b2e1b302 LR |
388 | } |
389 | ||
09d989d1 LR |
390 | /* |
391 | * The NL80211_REGDOM_SET_BY_USER regdom alpha2 is cached, this lets | |
392 | * you know if a valid regulatory hint with NL80211_REGDOM_SET_BY_USER | |
393 | * has ever been issued. | |
394 | */ | |
395 | static bool is_user_regdom_saved(void) | |
396 | { | |
397 | if (user_alpha2[0] == '9' && user_alpha2[1] == '7') | |
398 | return false; | |
399 | ||
400 | /* This would indicate a mistake on the design */ | |
1a919318 | 401 | if (WARN(!is_world_regdom(user_alpha2) && !is_an_alpha2(user_alpha2), |
09d989d1 | 402 | "Unexpected user alpha2: %c%c\n", |
1a919318 | 403 | user_alpha2[0], user_alpha2[1])) |
09d989d1 LR |
404 | return false; |
405 | ||
406 | return true; | |
407 | } | |
408 | ||
e9763c3c JB |
409 | static const struct ieee80211_regdomain * |
410 | reg_copy_regd(const struct ieee80211_regdomain *src_regd) | |
3b377ea9 JL |
411 | { |
412 | struct ieee80211_regdomain *regd; | |
e9763c3c | 413 | int size_of_regd; |
3b377ea9 JL |
414 | unsigned int i; |
415 | ||
82f20856 JB |
416 | size_of_regd = |
417 | sizeof(struct ieee80211_regdomain) + | |
418 | src_regd->n_reg_rules * sizeof(struct ieee80211_reg_rule); | |
3b377ea9 JL |
419 | |
420 | regd = kzalloc(size_of_regd, GFP_KERNEL); | |
421 | if (!regd) | |
e9763c3c | 422 | return ERR_PTR(-ENOMEM); |
3b377ea9 JL |
423 | |
424 | memcpy(regd, src_regd, sizeof(struct ieee80211_regdomain)); | |
425 | ||
426 | for (i = 0; i < src_regd->n_reg_rules; i++) | |
427 | memcpy(®d->reg_rules[i], &src_regd->reg_rules[i], | |
e9763c3c | 428 | sizeof(struct ieee80211_reg_rule)); |
3b377ea9 | 429 | |
e9763c3c | 430 | return regd; |
3b377ea9 JL |
431 | } |
432 | ||
433 | #ifdef CONFIG_CFG80211_INTERNAL_REGDB | |
434 | struct reg_regdb_search_request { | |
435 | char alpha2[2]; | |
436 | struct list_head list; | |
437 | }; | |
438 | ||
439 | static LIST_HEAD(reg_regdb_search_list); | |
368d06f5 | 440 | static DEFINE_MUTEX(reg_regdb_search_mutex); |
3b377ea9 JL |
441 | |
442 | static void reg_regdb_search(struct work_struct *work) | |
443 | { | |
444 | struct reg_regdb_search_request *request; | |
e9763c3c JB |
445 | const struct ieee80211_regdomain *curdom, *regdom = NULL; |
446 | int i; | |
a85d0d7f | 447 | |
5fe231e8 | 448 | rtnl_lock(); |
3b377ea9 | 449 | |
368d06f5 | 450 | mutex_lock(®_regdb_search_mutex); |
3b377ea9 JL |
451 | while (!list_empty(®_regdb_search_list)) { |
452 | request = list_first_entry(®_regdb_search_list, | |
453 | struct reg_regdb_search_request, | |
454 | list); | |
455 | list_del(&request->list); | |
456 | ||
1a919318 | 457 | for (i = 0; i < reg_regdb_size; i++) { |
3b377ea9 JL |
458 | curdom = reg_regdb[i]; |
459 | ||
1a919318 | 460 | if (alpha2_equal(request->alpha2, curdom->alpha2)) { |
e9763c3c | 461 | regdom = reg_copy_regd(curdom); |
3b377ea9 JL |
462 | break; |
463 | } | |
464 | } | |
465 | ||
466 | kfree(request); | |
467 | } | |
368d06f5 | 468 | mutex_unlock(®_regdb_search_mutex); |
a85d0d7f | 469 | |
e9763c3c | 470 | if (!IS_ERR_OR_NULL(regdom)) |
a85d0d7f LR |
471 | set_regdom(regdom); |
472 | ||
5fe231e8 | 473 | rtnl_unlock(); |
3b377ea9 JL |
474 | } |
475 | ||
476 | static DECLARE_WORK(reg_regdb_work, reg_regdb_search); | |
477 | ||
478 | static void reg_regdb_query(const char *alpha2) | |
479 | { | |
480 | struct reg_regdb_search_request *request; | |
481 | ||
482 | if (!alpha2) | |
483 | return; | |
484 | ||
485 | request = kzalloc(sizeof(struct reg_regdb_search_request), GFP_KERNEL); | |
486 | if (!request) | |
487 | return; | |
488 | ||
489 | memcpy(request->alpha2, alpha2, 2); | |
490 | ||
368d06f5 | 491 | mutex_lock(®_regdb_search_mutex); |
3b377ea9 | 492 | list_add_tail(&request->list, ®_regdb_search_list); |
368d06f5 | 493 | mutex_unlock(®_regdb_search_mutex); |
3b377ea9 JL |
494 | |
495 | schedule_work(®_regdb_work); | |
496 | } | |
80007efe LR |
497 | |
498 | /* Feel free to add any other sanity checks here */ | |
499 | static void reg_regdb_size_check(void) | |
500 | { | |
501 | /* We should ideally BUILD_BUG_ON() but then random builds would fail */ | |
502 | WARN_ONCE(!reg_regdb_size, "db.txt is empty, you should update it..."); | |
503 | } | |
3b377ea9 | 504 | #else |
80007efe | 505 | static inline void reg_regdb_size_check(void) {} |
3b377ea9 JL |
506 | static inline void reg_regdb_query(const char *alpha2) {} |
507 | #endif /* CONFIG_CFG80211_INTERNAL_REGDB */ | |
508 | ||
fb1fc7ad LR |
509 | /* |
510 | * This lets us keep regulatory code which is updated on a regulatory | |
1226d258 | 511 | * basis in userspace. |
fb1fc7ad | 512 | */ |
b2e1b302 LR |
513 | static int call_crda(const char *alpha2) |
514 | { | |
1226d258 JB |
515 | char country[12]; |
516 | char *env[] = { country, NULL }; | |
517 | ||
518 | snprintf(country, sizeof(country), "COUNTRY=%c%c", | |
519 | alpha2[0], alpha2[1]); | |
520 | ||
b2e1b302 | 521 | if (!is_world_regdom((char *) alpha2)) |
e9c0268f | 522 | pr_info("Calling CRDA for country: %c%c\n", |
b2e1b302 LR |
523 | alpha2[0], alpha2[1]); |
524 | else | |
e9c0268f | 525 | pr_info("Calling CRDA to update world regulatory domain\n"); |
b2e1b302 | 526 | |
3b377ea9 JL |
527 | /* query internal regulatory database (if it exists) */ |
528 | reg_regdb_query(alpha2); | |
529 | ||
1226d258 | 530 | return kobject_uevent_env(®_pdev->dev.kobj, KOBJ_CHANGE, env); |
b2e1b302 LR |
531 | } |
532 | ||
fe6631ff LR |
533 | static enum reg_request_treatment |
534 | reg_call_crda(struct regulatory_request *request) | |
535 | { | |
536 | if (call_crda(request->alpha2)) | |
537 | return REG_REQ_IGNORE; | |
538 | return REG_REQ_OK; | |
539 | } | |
540 | ||
e438768f | 541 | bool reg_is_valid_request(const char *alpha2) |
b2e1b302 | 542 | { |
c492db37 | 543 | struct regulatory_request *lr = get_last_request(); |
61405e97 | 544 | |
c492db37 | 545 | if (!lr || lr->processed) |
f6037d09 JB |
546 | return false; |
547 | ||
c492db37 | 548 | return alpha2_equal(lr->alpha2, alpha2); |
b2e1b302 | 549 | } |
8318d78a | 550 | |
e3961af1 JD |
551 | static const struct ieee80211_regdomain *reg_get_regdomain(struct wiphy *wiphy) |
552 | { | |
553 | struct regulatory_request *lr = get_last_request(); | |
554 | ||
555 | /* | |
556 | * Follow the driver's regulatory domain, if present, unless a country | |
557 | * IE has been processed or a user wants to help complaince further | |
558 | */ | |
559 | if (lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && | |
560 | lr->initiator != NL80211_REGDOM_SET_BY_USER && | |
561 | wiphy->regd) | |
562 | return get_wiphy_regdom(wiphy); | |
563 | ||
564 | return get_cfg80211_regdom(); | |
565 | } | |
566 | ||
97524820 JD |
567 | unsigned int reg_get_max_bandwidth(const struct ieee80211_regdomain *rd, |
568 | const struct ieee80211_reg_rule *rule) | |
569 | { | |
570 | const struct ieee80211_freq_range *freq_range = &rule->freq_range; | |
571 | const struct ieee80211_freq_range *freq_range_tmp; | |
572 | const struct ieee80211_reg_rule *tmp; | |
573 | u32 start_freq, end_freq, idx, no; | |
574 | ||
575 | for (idx = 0; idx < rd->n_reg_rules; idx++) | |
576 | if (rule == &rd->reg_rules[idx]) | |
577 | break; | |
578 | ||
579 | if (idx == rd->n_reg_rules) | |
580 | return 0; | |
581 | ||
582 | /* get start_freq */ | |
583 | no = idx; | |
584 | ||
585 | while (no) { | |
586 | tmp = &rd->reg_rules[--no]; | |
587 | freq_range_tmp = &tmp->freq_range; | |
588 | ||
589 | if (freq_range_tmp->end_freq_khz < freq_range->start_freq_khz) | |
590 | break; | |
591 | ||
97524820 JD |
592 | freq_range = freq_range_tmp; |
593 | } | |
594 | ||
595 | start_freq = freq_range->start_freq_khz; | |
596 | ||
597 | /* get end_freq */ | |
598 | freq_range = &rule->freq_range; | |
599 | no = idx; | |
600 | ||
601 | while (no < rd->n_reg_rules - 1) { | |
602 | tmp = &rd->reg_rules[++no]; | |
603 | freq_range_tmp = &tmp->freq_range; | |
604 | ||
605 | if (freq_range_tmp->start_freq_khz > freq_range->end_freq_khz) | |
606 | break; | |
607 | ||
97524820 JD |
608 | freq_range = freq_range_tmp; |
609 | } | |
610 | ||
611 | end_freq = freq_range->end_freq_khz; | |
612 | ||
613 | return end_freq - start_freq; | |
614 | } | |
615 | ||
b2e1b302 | 616 | /* Sanity check on a regulatory rule */ |
a3d2eaf0 | 617 | static bool is_valid_reg_rule(const struct ieee80211_reg_rule *rule) |
8318d78a | 618 | { |
a3d2eaf0 | 619 | const struct ieee80211_freq_range *freq_range = &rule->freq_range; |
b2e1b302 LR |
620 | u32 freq_diff; |
621 | ||
91e99004 | 622 | if (freq_range->start_freq_khz <= 0 || freq_range->end_freq_khz <= 0) |
b2e1b302 LR |
623 | return false; |
624 | ||
625 | if (freq_range->start_freq_khz > freq_range->end_freq_khz) | |
626 | return false; | |
627 | ||
628 | freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz; | |
629 | ||
bd05f28e | 630 | if (freq_range->end_freq_khz <= freq_range->start_freq_khz || |
1a919318 | 631 | freq_range->max_bandwidth_khz > freq_diff) |
b2e1b302 LR |
632 | return false; |
633 | ||
634 | return true; | |
635 | } | |
636 | ||
a3d2eaf0 | 637 | static bool is_valid_rd(const struct ieee80211_regdomain *rd) |
b2e1b302 | 638 | { |
a3d2eaf0 | 639 | const struct ieee80211_reg_rule *reg_rule = NULL; |
b2e1b302 | 640 | unsigned int i; |
8318d78a | 641 | |
b2e1b302 LR |
642 | if (!rd->n_reg_rules) |
643 | return false; | |
8318d78a | 644 | |
88dc1c3f LR |
645 | if (WARN_ON(rd->n_reg_rules > NL80211_MAX_SUPP_REG_RULES)) |
646 | return false; | |
647 | ||
b2e1b302 LR |
648 | for (i = 0; i < rd->n_reg_rules; i++) { |
649 | reg_rule = &rd->reg_rules[i]; | |
650 | if (!is_valid_reg_rule(reg_rule)) | |
651 | return false; | |
652 | } | |
653 | ||
654 | return true; | |
8318d78a JB |
655 | } |
656 | ||
038659e7 | 657 | static bool reg_does_bw_fit(const struct ieee80211_freq_range *freq_range, |
fe7ef5e9 | 658 | u32 center_freq_khz, u32 bw_khz) |
b2e1b302 | 659 | { |
038659e7 LR |
660 | u32 start_freq_khz, end_freq_khz; |
661 | ||
662 | start_freq_khz = center_freq_khz - (bw_khz/2); | |
663 | end_freq_khz = center_freq_khz + (bw_khz/2); | |
664 | ||
665 | if (start_freq_khz >= freq_range->start_freq_khz && | |
666 | end_freq_khz <= freq_range->end_freq_khz) | |
667 | return true; | |
668 | ||
669 | return false; | |
b2e1b302 | 670 | } |
8318d78a | 671 | |
0c7dc45d LR |
672 | /** |
673 | * freq_in_rule_band - tells us if a frequency is in a frequency band | |
674 | * @freq_range: frequency rule we want to query | |
675 | * @freq_khz: frequency we are inquiring about | |
676 | * | |
677 | * This lets us know if a specific frequency rule is or is not relevant to | |
678 | * a specific frequency's band. Bands are device specific and artificial | |
64629b9d VK |
679 | * definitions (the "2.4 GHz band", the "5 GHz band" and the "60GHz band"), |
680 | * however it is safe for now to assume that a frequency rule should not be | |
681 | * part of a frequency's band if the start freq or end freq are off by more | |
682 | * than 2 GHz for the 2.4 and 5 GHz bands, and by more than 10 GHz for the | |
683 | * 60 GHz band. | |
0c7dc45d LR |
684 | * This resolution can be lowered and should be considered as we add |
685 | * regulatory rule support for other "bands". | |
686 | **/ | |
687 | static bool freq_in_rule_band(const struct ieee80211_freq_range *freq_range, | |
1a919318 | 688 | u32 freq_khz) |
0c7dc45d LR |
689 | { |
690 | #define ONE_GHZ_IN_KHZ 1000000 | |
64629b9d VK |
691 | /* |
692 | * From 802.11ad: directional multi-gigabit (DMG): | |
693 | * Pertaining to operation in a frequency band containing a channel | |
694 | * with the Channel starting frequency above 45 GHz. | |
695 | */ | |
696 | u32 limit = freq_khz > 45 * ONE_GHZ_IN_KHZ ? | |
697 | 10 * ONE_GHZ_IN_KHZ : 2 * ONE_GHZ_IN_KHZ; | |
698 | if (abs(freq_khz - freq_range->start_freq_khz) <= limit) | |
0c7dc45d | 699 | return true; |
64629b9d | 700 | if (abs(freq_khz - freq_range->end_freq_khz) <= limit) |
0c7dc45d LR |
701 | return true; |
702 | return false; | |
703 | #undef ONE_GHZ_IN_KHZ | |
704 | } | |
705 | ||
adbfb058 LR |
706 | /* |
707 | * Later on we can perhaps use the more restrictive DFS | |
708 | * region but we don't have information for that yet so | |
709 | * for now simply disallow conflicts. | |
710 | */ | |
711 | static enum nl80211_dfs_regions | |
712 | reg_intersect_dfs_region(const enum nl80211_dfs_regions dfs_region1, | |
713 | const enum nl80211_dfs_regions dfs_region2) | |
714 | { | |
715 | if (dfs_region1 != dfs_region2) | |
716 | return NL80211_DFS_UNSET; | |
717 | return dfs_region1; | |
718 | } | |
719 | ||
fb1fc7ad LR |
720 | /* |
721 | * Helper for regdom_intersect(), this does the real | |
722 | * mathematical intersection fun | |
723 | */ | |
97524820 JD |
724 | static int reg_rules_intersect(const struct ieee80211_regdomain *rd1, |
725 | const struct ieee80211_regdomain *rd2, | |
726 | const struct ieee80211_reg_rule *rule1, | |
1a919318 JB |
727 | const struct ieee80211_reg_rule *rule2, |
728 | struct ieee80211_reg_rule *intersected_rule) | |
9c96477d LR |
729 | { |
730 | const struct ieee80211_freq_range *freq_range1, *freq_range2; | |
731 | struct ieee80211_freq_range *freq_range; | |
732 | const struct ieee80211_power_rule *power_rule1, *power_rule2; | |
733 | struct ieee80211_power_rule *power_rule; | |
97524820 | 734 | u32 freq_diff, max_bandwidth1, max_bandwidth2; |
9c96477d LR |
735 | |
736 | freq_range1 = &rule1->freq_range; | |
737 | freq_range2 = &rule2->freq_range; | |
738 | freq_range = &intersected_rule->freq_range; | |
739 | ||
740 | power_rule1 = &rule1->power_rule; | |
741 | power_rule2 = &rule2->power_rule; | |
742 | power_rule = &intersected_rule->power_rule; | |
743 | ||
744 | freq_range->start_freq_khz = max(freq_range1->start_freq_khz, | |
1a919318 | 745 | freq_range2->start_freq_khz); |
9c96477d | 746 | freq_range->end_freq_khz = min(freq_range1->end_freq_khz, |
1a919318 | 747 | freq_range2->end_freq_khz); |
97524820 JD |
748 | |
749 | max_bandwidth1 = freq_range1->max_bandwidth_khz; | |
750 | max_bandwidth2 = freq_range2->max_bandwidth_khz; | |
751 | ||
b0dfd2ea JD |
752 | if (rule1->flags & NL80211_RRF_AUTO_BW) |
753 | max_bandwidth1 = reg_get_max_bandwidth(rd1, rule1); | |
754 | if (rule2->flags & NL80211_RRF_AUTO_BW) | |
755 | max_bandwidth2 = reg_get_max_bandwidth(rd2, rule2); | |
97524820 JD |
756 | |
757 | freq_range->max_bandwidth_khz = min(max_bandwidth1, max_bandwidth2); | |
9c96477d | 758 | |
b0dfd2ea JD |
759 | intersected_rule->flags = rule1->flags | rule2->flags; |
760 | ||
761 | /* | |
762 | * In case NL80211_RRF_AUTO_BW requested for both rules | |
763 | * set AUTO_BW in intersected rule also. Next we will | |
764 | * calculate BW correctly in handle_channel function. | |
765 | * In other case remove AUTO_BW flag while we calculate | |
766 | * maximum bandwidth correctly and auto calculation is | |
767 | * not required. | |
768 | */ | |
769 | if ((rule1->flags & NL80211_RRF_AUTO_BW) && | |
770 | (rule2->flags & NL80211_RRF_AUTO_BW)) | |
771 | intersected_rule->flags |= NL80211_RRF_AUTO_BW; | |
772 | else | |
773 | intersected_rule->flags &= ~NL80211_RRF_AUTO_BW; | |
774 | ||
9c96477d LR |
775 | freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz; |
776 | if (freq_range->max_bandwidth_khz > freq_diff) | |
777 | freq_range->max_bandwidth_khz = freq_diff; | |
778 | ||
779 | power_rule->max_eirp = min(power_rule1->max_eirp, | |
780 | power_rule2->max_eirp); | |
781 | power_rule->max_antenna_gain = min(power_rule1->max_antenna_gain, | |
782 | power_rule2->max_antenna_gain); | |
783 | ||
089027e5 JD |
784 | intersected_rule->dfs_cac_ms = max(rule1->dfs_cac_ms, |
785 | rule2->dfs_cac_ms); | |
786 | ||
9c96477d LR |
787 | if (!is_valid_reg_rule(intersected_rule)) |
788 | return -EINVAL; | |
789 | ||
790 | return 0; | |
791 | } | |
792 | ||
793 | /** | |
794 | * regdom_intersect - do the intersection between two regulatory domains | |
795 | * @rd1: first regulatory domain | |
796 | * @rd2: second regulatory domain | |
797 | * | |
798 | * Use this function to get the intersection between two regulatory domains. | |
799 | * Once completed we will mark the alpha2 for the rd as intersected, "98", | |
800 | * as no one single alpha2 can represent this regulatory domain. | |
801 | * | |
802 | * Returns a pointer to the regulatory domain structure which will hold the | |
803 | * resulting intersection of rules between rd1 and rd2. We will | |
804 | * kzalloc() this structure for you. | |
805 | */ | |
1a919318 JB |
806 | static struct ieee80211_regdomain * |
807 | regdom_intersect(const struct ieee80211_regdomain *rd1, | |
808 | const struct ieee80211_regdomain *rd2) | |
9c96477d LR |
809 | { |
810 | int r, size_of_regd; | |
811 | unsigned int x, y; | |
812 | unsigned int num_rules = 0, rule_idx = 0; | |
813 | const struct ieee80211_reg_rule *rule1, *rule2; | |
814 | struct ieee80211_reg_rule *intersected_rule; | |
815 | struct ieee80211_regdomain *rd; | |
816 | /* This is just a dummy holder to help us count */ | |
74f53cd8 | 817 | struct ieee80211_reg_rule dummy_rule; |
9c96477d LR |
818 | |
819 | if (!rd1 || !rd2) | |
820 | return NULL; | |
821 | ||
fb1fc7ad LR |
822 | /* |
823 | * First we get a count of the rules we'll need, then we actually | |
9c96477d LR |
824 | * build them. This is to so we can malloc() and free() a |
825 | * regdomain once. The reason we use reg_rules_intersect() here | |
826 | * is it will return -EINVAL if the rule computed makes no sense. | |
fb1fc7ad LR |
827 | * All rules that do check out OK are valid. |
828 | */ | |
9c96477d LR |
829 | |
830 | for (x = 0; x < rd1->n_reg_rules; x++) { | |
831 | rule1 = &rd1->reg_rules[x]; | |
832 | for (y = 0; y < rd2->n_reg_rules; y++) { | |
833 | rule2 = &rd2->reg_rules[y]; | |
97524820 JD |
834 | if (!reg_rules_intersect(rd1, rd2, rule1, rule2, |
835 | &dummy_rule)) | |
9c96477d | 836 | num_rules++; |
9c96477d LR |
837 | } |
838 | } | |
839 | ||
840 | if (!num_rules) | |
841 | return NULL; | |
842 | ||
843 | size_of_regd = sizeof(struct ieee80211_regdomain) + | |
82f20856 | 844 | num_rules * sizeof(struct ieee80211_reg_rule); |
9c96477d LR |
845 | |
846 | rd = kzalloc(size_of_regd, GFP_KERNEL); | |
847 | if (!rd) | |
848 | return NULL; | |
849 | ||
8a57fff0 | 850 | for (x = 0; x < rd1->n_reg_rules && rule_idx < num_rules; x++) { |
9c96477d | 851 | rule1 = &rd1->reg_rules[x]; |
8a57fff0 | 852 | for (y = 0; y < rd2->n_reg_rules && rule_idx < num_rules; y++) { |
9c96477d | 853 | rule2 = &rd2->reg_rules[y]; |
fb1fc7ad LR |
854 | /* |
855 | * This time around instead of using the stack lets | |
9c96477d | 856 | * write to the target rule directly saving ourselves |
fb1fc7ad LR |
857 | * a memcpy() |
858 | */ | |
9c96477d | 859 | intersected_rule = &rd->reg_rules[rule_idx]; |
97524820 JD |
860 | r = reg_rules_intersect(rd1, rd2, rule1, rule2, |
861 | intersected_rule); | |
fb1fc7ad LR |
862 | /* |
863 | * No need to memset here the intersected rule here as | |
864 | * we're not using the stack anymore | |
865 | */ | |
9c96477d LR |
866 | if (r) |
867 | continue; | |
868 | rule_idx++; | |
869 | } | |
870 | } | |
871 | ||
872 | if (rule_idx != num_rules) { | |
873 | kfree(rd); | |
874 | return NULL; | |
875 | } | |
876 | ||
877 | rd->n_reg_rules = num_rules; | |
878 | rd->alpha2[0] = '9'; | |
879 | rd->alpha2[1] = '8'; | |
adbfb058 LR |
880 | rd->dfs_region = reg_intersect_dfs_region(rd1->dfs_region, |
881 | rd2->dfs_region); | |
9c96477d LR |
882 | |
883 | return rd; | |
884 | } | |
885 | ||
fb1fc7ad LR |
886 | /* |
887 | * XXX: add support for the rest of enum nl80211_reg_rule_flags, we may | |
888 | * want to just have the channel structure use these | |
889 | */ | |
b2e1b302 LR |
890 | static u32 map_regdom_flags(u32 rd_flags) |
891 | { | |
892 | u32 channel_flags = 0; | |
8fe02e16 LR |
893 | if (rd_flags & NL80211_RRF_NO_IR_ALL) |
894 | channel_flags |= IEEE80211_CHAN_NO_IR; | |
b2e1b302 LR |
895 | if (rd_flags & NL80211_RRF_DFS) |
896 | channel_flags |= IEEE80211_CHAN_RADAR; | |
03f6b084 SF |
897 | if (rd_flags & NL80211_RRF_NO_OFDM) |
898 | channel_flags |= IEEE80211_CHAN_NO_OFDM; | |
570dbde1 DS |
899 | if (rd_flags & NL80211_RRF_NO_OUTDOOR) |
900 | channel_flags |= IEEE80211_CHAN_INDOOR_ONLY; | |
b2e1b302 LR |
901 | return channel_flags; |
902 | } | |
903 | ||
361c9c8b JB |
904 | static const struct ieee80211_reg_rule * |
905 | freq_reg_info_regd(struct wiphy *wiphy, u32 center_freq, | |
906 | const struct ieee80211_regdomain *regd) | |
8318d78a JB |
907 | { |
908 | int i; | |
0c7dc45d | 909 | bool band_rule_found = false; |
038659e7 LR |
910 | bool bw_fits = false; |
911 | ||
3e0c3ff3 | 912 | if (!regd) |
361c9c8b | 913 | return ERR_PTR(-EINVAL); |
b2e1b302 | 914 | |
3e0c3ff3 | 915 | for (i = 0; i < regd->n_reg_rules; i++) { |
b2e1b302 LR |
916 | const struct ieee80211_reg_rule *rr; |
917 | const struct ieee80211_freq_range *fr = NULL; | |
b2e1b302 | 918 | |
3e0c3ff3 | 919 | rr = ®d->reg_rules[i]; |
b2e1b302 | 920 | fr = &rr->freq_range; |
0c7dc45d | 921 | |
fb1fc7ad LR |
922 | /* |
923 | * We only need to know if one frequency rule was | |
0c7dc45d | 924 | * was in center_freq's band, that's enough, so lets |
fb1fc7ad LR |
925 | * not overwrite it once found |
926 | */ | |
0c7dc45d LR |
927 | if (!band_rule_found) |
928 | band_rule_found = freq_in_rule_band(fr, center_freq); | |
929 | ||
fe7ef5e9 | 930 | bw_fits = reg_does_bw_fit(fr, center_freq, MHZ_TO_KHZ(20)); |
0c7dc45d | 931 | |
361c9c8b JB |
932 | if (band_rule_found && bw_fits) |
933 | return rr; | |
8318d78a JB |
934 | } |
935 | ||
0c7dc45d | 936 | if (!band_rule_found) |
361c9c8b | 937 | return ERR_PTR(-ERANGE); |
0c7dc45d | 938 | |
361c9c8b | 939 | return ERR_PTR(-EINVAL); |
b2e1b302 LR |
940 | } |
941 | ||
361c9c8b JB |
942 | const struct ieee80211_reg_rule *freq_reg_info(struct wiphy *wiphy, |
943 | u32 center_freq) | |
1fa25e41 | 944 | { |
5d885b99 | 945 | const struct ieee80211_regdomain *regd; |
1a919318 | 946 | |
e3961af1 | 947 | regd = reg_get_regdomain(wiphy); |
5d885b99 | 948 | |
361c9c8b | 949 | return freq_reg_info_regd(wiphy, center_freq, regd); |
1fa25e41 | 950 | } |
4f366c5d | 951 | EXPORT_SYMBOL(freq_reg_info); |
b2e1b302 | 952 | |
034c6d6e | 953 | const char *reg_initiator_name(enum nl80211_reg_initiator initiator) |
926a0a09 LR |
954 | { |
955 | switch (initiator) { | |
956 | case NL80211_REGDOM_SET_BY_CORE: | |
034c6d6e | 957 | return "core"; |
926a0a09 | 958 | case NL80211_REGDOM_SET_BY_USER: |
034c6d6e | 959 | return "user"; |
926a0a09 | 960 | case NL80211_REGDOM_SET_BY_DRIVER: |
034c6d6e | 961 | return "driver"; |
926a0a09 | 962 | case NL80211_REGDOM_SET_BY_COUNTRY_IE: |
034c6d6e | 963 | return "country IE"; |
926a0a09 LR |
964 | default: |
965 | WARN_ON(1); | |
034c6d6e | 966 | return "bug"; |
926a0a09 LR |
967 | } |
968 | } | |
034c6d6e | 969 | EXPORT_SYMBOL(reg_initiator_name); |
e702d3cf | 970 | |
034c6d6e | 971 | #ifdef CONFIG_CFG80211_REG_DEBUG |
b0dfd2ea JD |
972 | static void chan_reg_rule_print_dbg(const struct ieee80211_regdomain *regd, |
973 | struct ieee80211_channel *chan, | |
e702d3cf LR |
974 | const struct ieee80211_reg_rule *reg_rule) |
975 | { | |
976 | const struct ieee80211_power_rule *power_rule; | |
977 | const struct ieee80211_freq_range *freq_range; | |
b0dfd2ea | 978 | char max_antenna_gain[32], bw[32]; |
e702d3cf LR |
979 | |
980 | power_rule = ®_rule->power_rule; | |
981 | freq_range = ®_rule->freq_range; | |
982 | ||
983 | if (!power_rule->max_antenna_gain) | |
b0dfd2ea | 984 | snprintf(max_antenna_gain, sizeof(max_antenna_gain), "N/A"); |
e702d3cf | 985 | else |
b0dfd2ea JD |
986 | snprintf(max_antenna_gain, sizeof(max_antenna_gain), "%d", |
987 | power_rule->max_antenna_gain); | |
988 | ||
989 | if (reg_rule->flags & NL80211_RRF_AUTO_BW) | |
990 | snprintf(bw, sizeof(bw), "%d KHz, %d KHz AUTO", | |
991 | freq_range->max_bandwidth_khz, | |
992 | reg_get_max_bandwidth(regd, reg_rule)); | |
993 | else | |
994 | snprintf(bw, sizeof(bw), "%d KHz", | |
995 | freq_range->max_bandwidth_khz); | |
e702d3cf | 996 | |
fe7ef5e9 JB |
997 | REG_DBG_PRINT("Updating information on frequency %d MHz with regulatory rule:\n", |
998 | chan->center_freq); | |
e702d3cf | 999 | |
b0dfd2ea | 1000 | REG_DBG_PRINT("%d KHz - %d KHz @ %s), (%s mBi, %d mBm)\n", |
1a919318 | 1001 | freq_range->start_freq_khz, freq_range->end_freq_khz, |
b0dfd2ea | 1002 | bw, max_antenna_gain, |
e702d3cf LR |
1003 | power_rule->max_eirp); |
1004 | } | |
1005 | #else | |
b0dfd2ea JD |
1006 | static void chan_reg_rule_print_dbg(const struct ieee80211_regdomain *regd, |
1007 | struct ieee80211_channel *chan, | |
e702d3cf LR |
1008 | const struct ieee80211_reg_rule *reg_rule) |
1009 | { | |
1010 | return; | |
1011 | } | |
926a0a09 LR |
1012 | #endif |
1013 | ||
038659e7 LR |
1014 | /* |
1015 | * Note that right now we assume the desired channel bandwidth | |
1016 | * is always 20 MHz for each individual channel (HT40 uses 20 MHz | |
fe7ef5e9 | 1017 | * per channel, the primary and the extension channel). |
038659e7 | 1018 | */ |
7ca43d03 LR |
1019 | static void handle_channel(struct wiphy *wiphy, |
1020 | enum nl80211_reg_initiator initiator, | |
fdc9d7b2 | 1021 | struct ieee80211_channel *chan) |
b2e1b302 | 1022 | { |
038659e7 | 1023 | u32 flags, bw_flags = 0; |
b2e1b302 LR |
1024 | const struct ieee80211_reg_rule *reg_rule = NULL; |
1025 | const struct ieee80211_power_rule *power_rule = NULL; | |
038659e7 | 1026 | const struct ieee80211_freq_range *freq_range = NULL; |
fe33eb39 | 1027 | struct wiphy *request_wiphy = NULL; |
c492db37 | 1028 | struct regulatory_request *lr = get_last_request(); |
97524820 JD |
1029 | const struct ieee80211_regdomain *regd; |
1030 | u32 max_bandwidth_khz; | |
a92a3ce7 | 1031 | |
c492db37 | 1032 | request_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx); |
a92a3ce7 LR |
1033 | |
1034 | flags = chan->orig_flags; | |
b2e1b302 | 1035 | |
361c9c8b JB |
1036 | reg_rule = freq_reg_info(wiphy, MHZ_TO_KHZ(chan->center_freq)); |
1037 | if (IS_ERR(reg_rule)) { | |
ca4ffe8f LR |
1038 | /* |
1039 | * We will disable all channels that do not match our | |
25985edc | 1040 | * received regulatory rule unless the hint is coming |
ca4ffe8f LR |
1041 | * from a Country IE and the Country IE had no information |
1042 | * about a band. The IEEE 802.11 spec allows for an AP | |
1043 | * to send only a subset of the regulatory rules allowed, | |
1044 | * so an AP in the US that only supports 2.4 GHz may only send | |
1045 | * a country IE with information for the 2.4 GHz band | |
1046 | * while 5 GHz is still supported. | |
1047 | */ | |
1048 | if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE && | |
361c9c8b | 1049 | PTR_ERR(reg_rule) == -ERANGE) |
ca4ffe8f LR |
1050 | return; |
1051 | ||
cc493e4f LR |
1052 | if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER && |
1053 | request_wiphy && request_wiphy == wiphy && | |
a2f73b6c | 1054 | request_wiphy->regulatory_flags & REGULATORY_STRICT_REG) { |
cc493e4f LR |
1055 | REG_DBG_PRINT("Disabling freq %d MHz for good\n", |
1056 | chan->center_freq); | |
1057 | chan->orig_flags |= IEEE80211_CHAN_DISABLED; | |
1058 | chan->flags = chan->orig_flags; | |
1059 | } else { | |
1060 | REG_DBG_PRINT("Disabling freq %d MHz\n", | |
1061 | chan->center_freq); | |
1062 | chan->flags |= IEEE80211_CHAN_DISABLED; | |
1063 | } | |
8318d78a | 1064 | return; |
ca4ffe8f | 1065 | } |
8318d78a | 1066 | |
b0dfd2ea JD |
1067 | regd = reg_get_regdomain(wiphy); |
1068 | chan_reg_rule_print_dbg(regd, chan, reg_rule); | |
e702d3cf | 1069 | |
b2e1b302 | 1070 | power_rule = ®_rule->power_rule; |
038659e7 LR |
1071 | freq_range = ®_rule->freq_range; |
1072 | ||
97524820 JD |
1073 | max_bandwidth_khz = freq_range->max_bandwidth_khz; |
1074 | /* Check if auto calculation requested */ | |
b0dfd2ea | 1075 | if (reg_rule->flags & NL80211_RRF_AUTO_BW) |
97524820 | 1076 | max_bandwidth_khz = reg_get_max_bandwidth(regd, reg_rule); |
97524820 JD |
1077 | |
1078 | if (max_bandwidth_khz < MHZ_TO_KHZ(40)) | |
038659e7 | 1079 | bw_flags = IEEE80211_CHAN_NO_HT40; |
97524820 | 1080 | if (max_bandwidth_khz < MHZ_TO_KHZ(80)) |
c7a6ee27 | 1081 | bw_flags |= IEEE80211_CHAN_NO_80MHZ; |
97524820 | 1082 | if (max_bandwidth_khz < MHZ_TO_KHZ(160)) |
c7a6ee27 | 1083 | bw_flags |= IEEE80211_CHAN_NO_160MHZ; |
b2e1b302 | 1084 | |
c492db37 | 1085 | if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER && |
806a9e39 | 1086 | request_wiphy && request_wiphy == wiphy && |
a2f73b6c | 1087 | request_wiphy->regulatory_flags & REGULATORY_STRICT_REG) { |
fb1fc7ad | 1088 | /* |
25985edc | 1089 | * This guarantees the driver's requested regulatory domain |
f976376d | 1090 | * will always be used as a base for further regulatory |
fb1fc7ad LR |
1091 | * settings |
1092 | */ | |
f976376d | 1093 | chan->flags = chan->orig_flags = |
038659e7 | 1094 | map_regdom_flags(reg_rule->flags) | bw_flags; |
f976376d LR |
1095 | chan->max_antenna_gain = chan->orig_mag = |
1096 | (int) MBI_TO_DBI(power_rule->max_antenna_gain); | |
279f0f55 | 1097 | chan->max_reg_power = chan->max_power = chan->orig_mpwr = |
f976376d | 1098 | (int) MBM_TO_DBM(power_rule->max_eirp); |
4f267c11 JD |
1099 | |
1100 | if (chan->flags & IEEE80211_CHAN_RADAR) { | |
1101 | chan->dfs_cac_ms = IEEE80211_DFS_MIN_CAC_TIME_MS; | |
1102 | if (reg_rule->dfs_cac_ms) | |
1103 | chan->dfs_cac_ms = reg_rule->dfs_cac_ms; | |
1104 | } | |
1105 | ||
f976376d LR |
1106 | return; |
1107 | } | |
1108 | ||
04f39047 SW |
1109 | chan->dfs_state = NL80211_DFS_USABLE; |
1110 | chan->dfs_state_entered = jiffies; | |
1111 | ||
aa3d7eef | 1112 | chan->beacon_found = false; |
038659e7 | 1113 | chan->flags = flags | bw_flags | map_regdom_flags(reg_rule->flags); |
1a919318 JB |
1114 | chan->max_antenna_gain = |
1115 | min_t(int, chan->orig_mag, | |
1116 | MBI_TO_DBI(power_rule->max_antenna_gain)); | |
eccc068e | 1117 | chan->max_reg_power = (int) MBM_TO_DBM(power_rule->max_eirp); |
089027e5 JD |
1118 | |
1119 | if (chan->flags & IEEE80211_CHAN_RADAR) { | |
1120 | if (reg_rule->dfs_cac_ms) | |
1121 | chan->dfs_cac_ms = reg_rule->dfs_cac_ms; | |
1122 | else | |
1123 | chan->dfs_cac_ms = IEEE80211_DFS_MIN_CAC_TIME_MS; | |
1124 | } | |
1125 | ||
5e31fc08 SG |
1126 | if (chan->orig_mpwr) { |
1127 | /* | |
a09a85a0 LR |
1128 | * Devices that use REGULATORY_COUNTRY_IE_FOLLOW_POWER |
1129 | * will always follow the passed country IE power settings. | |
5e31fc08 SG |
1130 | */ |
1131 | if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE && | |
a09a85a0 | 1132 | wiphy->regulatory_flags & REGULATORY_COUNTRY_IE_FOLLOW_POWER) |
5e31fc08 SG |
1133 | chan->max_power = chan->max_reg_power; |
1134 | else | |
1135 | chan->max_power = min(chan->orig_mpwr, | |
1136 | chan->max_reg_power); | |
1137 | } else | |
1138 | chan->max_power = chan->max_reg_power; | |
8318d78a JB |
1139 | } |
1140 | ||
7ca43d03 | 1141 | static void handle_band(struct wiphy *wiphy, |
fdc9d7b2 JB |
1142 | enum nl80211_reg_initiator initiator, |
1143 | struct ieee80211_supported_band *sband) | |
8318d78a | 1144 | { |
a92a3ce7 | 1145 | unsigned int i; |
a92a3ce7 | 1146 | |
fdc9d7b2 JB |
1147 | if (!sband) |
1148 | return; | |
8318d78a JB |
1149 | |
1150 | for (i = 0; i < sband->n_channels; i++) | |
fdc9d7b2 | 1151 | handle_channel(wiphy, initiator, &sband->channels[i]); |
8318d78a JB |
1152 | } |
1153 | ||
57b5ce07 LR |
1154 | static bool reg_request_cell_base(struct regulatory_request *request) |
1155 | { | |
1156 | if (request->initiator != NL80211_REGDOM_SET_BY_USER) | |
1157 | return false; | |
1a919318 | 1158 | return request->user_reg_hint_type == NL80211_USER_REG_HINT_CELL_BASE; |
57b5ce07 LR |
1159 | } |
1160 | ||
52616f2b IP |
1161 | static bool reg_request_indoor(struct regulatory_request *request) |
1162 | { | |
1163 | if (request->initiator != NL80211_REGDOM_SET_BY_USER) | |
1164 | return false; | |
1165 | return request->user_reg_hint_type == NL80211_USER_REG_HINT_INDOOR; | |
1166 | } | |
1167 | ||
57b5ce07 LR |
1168 | bool reg_last_request_cell_base(void) |
1169 | { | |
38fd2143 | 1170 | return reg_request_cell_base(get_last_request()); |
57b5ce07 LR |
1171 | } |
1172 | ||
94fc661f | 1173 | #ifdef CONFIG_CFG80211_REG_CELLULAR_HINTS |
57b5ce07 | 1174 | /* Core specific check */ |
2f92212b JB |
1175 | static enum reg_request_treatment |
1176 | reg_ignore_cell_hint(struct regulatory_request *pending_request) | |
57b5ce07 | 1177 | { |
c492db37 JB |
1178 | struct regulatory_request *lr = get_last_request(); |
1179 | ||
57b5ce07 | 1180 | if (!reg_num_devs_support_basehint) |
2f92212b | 1181 | return REG_REQ_IGNORE; |
57b5ce07 | 1182 | |
c492db37 | 1183 | if (reg_request_cell_base(lr) && |
1a919318 | 1184 | !regdom_changes(pending_request->alpha2)) |
2f92212b | 1185 | return REG_REQ_ALREADY_SET; |
1a919318 | 1186 | |
2f92212b | 1187 | return REG_REQ_OK; |
57b5ce07 LR |
1188 | } |
1189 | ||
1190 | /* Device specific check */ | |
1191 | static bool reg_dev_ignore_cell_hint(struct wiphy *wiphy) | |
1192 | { | |
1a919318 | 1193 | return !(wiphy->features & NL80211_FEATURE_CELL_BASE_REG_HINTS); |
57b5ce07 LR |
1194 | } |
1195 | #else | |
1196 | static int reg_ignore_cell_hint(struct regulatory_request *pending_request) | |
1197 | { | |
2f92212b | 1198 | return REG_REQ_IGNORE; |
57b5ce07 | 1199 | } |
1a919318 JB |
1200 | |
1201 | static bool reg_dev_ignore_cell_hint(struct wiphy *wiphy) | |
57b5ce07 LR |
1202 | { |
1203 | return true; | |
1204 | } | |
1205 | #endif | |
1206 | ||
fa1fb9cb LR |
1207 | static bool wiphy_strict_alpha2_regd(struct wiphy *wiphy) |
1208 | { | |
a2f73b6c LR |
1209 | if (wiphy->regulatory_flags & REGULATORY_STRICT_REG && |
1210 | !(wiphy->regulatory_flags & REGULATORY_CUSTOM_REG)) | |
fa1fb9cb LR |
1211 | return true; |
1212 | return false; | |
1213 | } | |
57b5ce07 | 1214 | |
7db90f4a LR |
1215 | static bool ignore_reg_update(struct wiphy *wiphy, |
1216 | enum nl80211_reg_initiator initiator) | |
14b9815a | 1217 | { |
c492db37 JB |
1218 | struct regulatory_request *lr = get_last_request(); |
1219 | ||
1220 | if (!lr) { | |
034c6d6e LR |
1221 | REG_DBG_PRINT("Ignoring regulatory request set by %s " |
1222 | "since last_request is not set\n", | |
926a0a09 | 1223 | reg_initiator_name(initiator)); |
14b9815a | 1224 | return true; |
926a0a09 LR |
1225 | } |
1226 | ||
7db90f4a | 1227 | if (initiator == NL80211_REGDOM_SET_BY_CORE && |
a2f73b6c | 1228 | wiphy->regulatory_flags & REGULATORY_CUSTOM_REG) { |
034c6d6e LR |
1229 | REG_DBG_PRINT("Ignoring regulatory request set by %s " |
1230 | "since the driver uses its own custom " | |
1231 | "regulatory domain\n", | |
926a0a09 | 1232 | reg_initiator_name(initiator)); |
14b9815a | 1233 | return true; |
926a0a09 LR |
1234 | } |
1235 | ||
fb1fc7ad LR |
1236 | /* |
1237 | * wiphy->regd will be set once the device has its own | |
1238 | * desired regulatory domain set | |
1239 | */ | |
fa1fb9cb | 1240 | if (wiphy_strict_alpha2_regd(wiphy) && !wiphy->regd && |
749b527b | 1241 | initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && |
c492db37 | 1242 | !is_world_regdom(lr->alpha2)) { |
034c6d6e LR |
1243 | REG_DBG_PRINT("Ignoring regulatory request set by %s " |
1244 | "since the driver requires its own regulatory " | |
1245 | "domain to be set first\n", | |
926a0a09 | 1246 | reg_initiator_name(initiator)); |
14b9815a | 1247 | return true; |
926a0a09 LR |
1248 | } |
1249 | ||
c492db37 | 1250 | if (reg_request_cell_base(lr)) |
57b5ce07 LR |
1251 | return reg_dev_ignore_cell_hint(wiphy); |
1252 | ||
14b9815a LR |
1253 | return false; |
1254 | } | |
1255 | ||
3195e489 LR |
1256 | static bool reg_is_world_roaming(struct wiphy *wiphy) |
1257 | { | |
1258 | const struct ieee80211_regdomain *cr = get_cfg80211_regdom(); | |
1259 | const struct ieee80211_regdomain *wr = get_wiphy_regdom(wiphy); | |
1260 | struct regulatory_request *lr = get_last_request(); | |
1261 | ||
1262 | if (is_world_regdom(cr->alpha2) || (wr && is_world_regdom(wr->alpha2))) | |
1263 | return true; | |
1264 | ||
1265 | if (lr && lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && | |
a2f73b6c | 1266 | wiphy->regulatory_flags & REGULATORY_CUSTOM_REG) |
3195e489 LR |
1267 | return true; |
1268 | ||
1269 | return false; | |
1270 | } | |
1271 | ||
1a919318 | 1272 | static void handle_reg_beacon(struct wiphy *wiphy, unsigned int chan_idx, |
e38f8a7a LR |
1273 | struct reg_beacon *reg_beacon) |
1274 | { | |
e38f8a7a LR |
1275 | struct ieee80211_supported_band *sband; |
1276 | struct ieee80211_channel *chan; | |
6bad8766 LR |
1277 | bool channel_changed = false; |
1278 | struct ieee80211_channel chan_before; | |
e38f8a7a | 1279 | |
e38f8a7a LR |
1280 | sband = wiphy->bands[reg_beacon->chan.band]; |
1281 | chan = &sband->channels[chan_idx]; | |
1282 | ||
1283 | if (likely(chan->center_freq != reg_beacon->chan.center_freq)) | |
1284 | return; | |
1285 | ||
6bad8766 LR |
1286 | if (chan->beacon_found) |
1287 | return; | |
1288 | ||
1289 | chan->beacon_found = true; | |
1290 | ||
0f500a5f LR |
1291 | if (!reg_is_world_roaming(wiphy)) |
1292 | return; | |
1293 | ||
a2f73b6c | 1294 | if (wiphy->regulatory_flags & REGULATORY_DISABLE_BEACON_HINTS) |
37184244 LR |
1295 | return; |
1296 | ||
6bad8766 LR |
1297 | chan_before.center_freq = chan->center_freq; |
1298 | chan_before.flags = chan->flags; | |
1299 | ||
8fe02e16 LR |
1300 | if (chan->flags & IEEE80211_CHAN_NO_IR) { |
1301 | chan->flags &= ~IEEE80211_CHAN_NO_IR; | |
6bad8766 | 1302 | channel_changed = true; |
e38f8a7a LR |
1303 | } |
1304 | ||
6bad8766 LR |
1305 | if (channel_changed) |
1306 | nl80211_send_beacon_hint_event(wiphy, &chan_before, chan); | |
e38f8a7a LR |
1307 | } |
1308 | ||
1309 | /* | |
1310 | * Called when a scan on a wiphy finds a beacon on | |
1311 | * new channel | |
1312 | */ | |
1313 | static void wiphy_update_new_beacon(struct wiphy *wiphy, | |
1314 | struct reg_beacon *reg_beacon) | |
1315 | { | |
1316 | unsigned int i; | |
1317 | struct ieee80211_supported_band *sband; | |
1318 | ||
e38f8a7a LR |
1319 | if (!wiphy->bands[reg_beacon->chan.band]) |
1320 | return; | |
1321 | ||
1322 | sband = wiphy->bands[reg_beacon->chan.band]; | |
1323 | ||
1324 | for (i = 0; i < sband->n_channels; i++) | |
1325 | handle_reg_beacon(wiphy, i, reg_beacon); | |
1326 | } | |
1327 | ||
1328 | /* | |
1329 | * Called upon reg changes or a new wiphy is added | |
1330 | */ | |
1331 | static void wiphy_update_beacon_reg(struct wiphy *wiphy) | |
1332 | { | |
1333 | unsigned int i; | |
1334 | struct ieee80211_supported_band *sband; | |
1335 | struct reg_beacon *reg_beacon; | |
1336 | ||
e38f8a7a LR |
1337 | list_for_each_entry(reg_beacon, ®_beacon_list, list) { |
1338 | if (!wiphy->bands[reg_beacon->chan.band]) | |
1339 | continue; | |
1340 | sband = wiphy->bands[reg_beacon->chan.band]; | |
1341 | for (i = 0; i < sband->n_channels; i++) | |
1342 | handle_reg_beacon(wiphy, i, reg_beacon); | |
1343 | } | |
1344 | } | |
1345 | ||
e38f8a7a LR |
1346 | /* Reap the advantages of previously found beacons */ |
1347 | static void reg_process_beacons(struct wiphy *wiphy) | |
1348 | { | |
b1ed8ddd LR |
1349 | /* |
1350 | * Means we are just firing up cfg80211, so no beacons would | |
1351 | * have been processed yet. | |
1352 | */ | |
1353 | if (!last_request) | |
1354 | return; | |
e38f8a7a LR |
1355 | wiphy_update_beacon_reg(wiphy); |
1356 | } | |
1357 | ||
1a919318 | 1358 | static bool is_ht40_allowed(struct ieee80211_channel *chan) |
038659e7 LR |
1359 | { |
1360 | if (!chan) | |
1a919318 | 1361 | return false; |
038659e7 | 1362 | if (chan->flags & IEEE80211_CHAN_DISABLED) |
1a919318 | 1363 | return false; |
038659e7 | 1364 | /* This would happen when regulatory rules disallow HT40 completely */ |
55b183ad FF |
1365 | if ((chan->flags & IEEE80211_CHAN_NO_HT40) == IEEE80211_CHAN_NO_HT40) |
1366 | return false; | |
1367 | return true; | |
038659e7 LR |
1368 | } |
1369 | ||
1370 | static void reg_process_ht_flags_channel(struct wiphy *wiphy, | |
fdc9d7b2 | 1371 | struct ieee80211_channel *channel) |
038659e7 | 1372 | { |
fdc9d7b2 | 1373 | struct ieee80211_supported_band *sband = wiphy->bands[channel->band]; |
038659e7 LR |
1374 | struct ieee80211_channel *channel_before = NULL, *channel_after = NULL; |
1375 | unsigned int i; | |
1376 | ||
1a919318 | 1377 | if (!is_ht40_allowed(channel)) { |
038659e7 LR |
1378 | channel->flags |= IEEE80211_CHAN_NO_HT40; |
1379 | return; | |
1380 | } | |
1381 | ||
1382 | /* | |
1383 | * We need to ensure the extension channels exist to | |
1384 | * be able to use HT40- or HT40+, this finds them (or not) | |
1385 | */ | |
1386 | for (i = 0; i < sband->n_channels; i++) { | |
1387 | struct ieee80211_channel *c = &sband->channels[i]; | |
1a919318 | 1388 | |
038659e7 LR |
1389 | if (c->center_freq == (channel->center_freq - 20)) |
1390 | channel_before = c; | |
1391 | if (c->center_freq == (channel->center_freq + 20)) | |
1392 | channel_after = c; | |
1393 | } | |
1394 | ||
1395 | /* | |
1396 | * Please note that this assumes target bandwidth is 20 MHz, | |
1397 | * if that ever changes we also need to change the below logic | |
1398 | * to include that as well. | |
1399 | */ | |
1a919318 | 1400 | if (!is_ht40_allowed(channel_before)) |
689da1b3 | 1401 | channel->flags |= IEEE80211_CHAN_NO_HT40MINUS; |
038659e7 | 1402 | else |
689da1b3 | 1403 | channel->flags &= ~IEEE80211_CHAN_NO_HT40MINUS; |
038659e7 | 1404 | |
1a919318 | 1405 | if (!is_ht40_allowed(channel_after)) |
689da1b3 | 1406 | channel->flags |= IEEE80211_CHAN_NO_HT40PLUS; |
038659e7 | 1407 | else |
689da1b3 | 1408 | channel->flags &= ~IEEE80211_CHAN_NO_HT40PLUS; |
038659e7 LR |
1409 | } |
1410 | ||
1411 | static void reg_process_ht_flags_band(struct wiphy *wiphy, | |
fdc9d7b2 | 1412 | struct ieee80211_supported_band *sband) |
038659e7 LR |
1413 | { |
1414 | unsigned int i; | |
038659e7 | 1415 | |
fdc9d7b2 JB |
1416 | if (!sband) |
1417 | return; | |
038659e7 LR |
1418 | |
1419 | for (i = 0; i < sband->n_channels; i++) | |
fdc9d7b2 | 1420 | reg_process_ht_flags_channel(wiphy, &sband->channels[i]); |
038659e7 LR |
1421 | } |
1422 | ||
1423 | static void reg_process_ht_flags(struct wiphy *wiphy) | |
1424 | { | |
1425 | enum ieee80211_band band; | |
1426 | ||
1427 | if (!wiphy) | |
1428 | return; | |
1429 | ||
fdc9d7b2 JB |
1430 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) |
1431 | reg_process_ht_flags_band(wiphy, wiphy->bands[band]); | |
038659e7 LR |
1432 | } |
1433 | ||
0e3802db LR |
1434 | static void reg_call_notifier(struct wiphy *wiphy, |
1435 | struct regulatory_request *request) | |
1436 | { | |
1437 | if (wiphy->reg_notifier) | |
1438 | wiphy->reg_notifier(wiphy, request); | |
1439 | } | |
1440 | ||
eac03e38 SN |
1441 | static void wiphy_update_regulatory(struct wiphy *wiphy, |
1442 | enum nl80211_reg_initiator initiator) | |
b2e1b302 LR |
1443 | { |
1444 | enum ieee80211_band band; | |
c492db37 | 1445 | struct regulatory_request *lr = get_last_request(); |
eac03e38 | 1446 | |
0e3802db LR |
1447 | if (ignore_reg_update(wiphy, initiator)) { |
1448 | /* | |
1449 | * Regulatory updates set by CORE are ignored for custom | |
1450 | * regulatory cards. Let us notify the changes to the driver, | |
1451 | * as some drivers used this to restore its orig_* reg domain. | |
1452 | */ | |
1453 | if (initiator == NL80211_REGDOM_SET_BY_CORE && | |
a2f73b6c | 1454 | wiphy->regulatory_flags & REGULATORY_CUSTOM_REG) |
0e3802db | 1455 | reg_call_notifier(wiphy, lr); |
a203c2aa | 1456 | return; |
0e3802db | 1457 | } |
a203c2aa | 1458 | |
c492db37 | 1459 | lr->dfs_region = get_cfg80211_regdom()->dfs_region; |
b68e6b3b | 1460 | |
fdc9d7b2 JB |
1461 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) |
1462 | handle_band(wiphy, initiator, wiphy->bands[band]); | |
a203c2aa | 1463 | |
e38f8a7a | 1464 | reg_process_beacons(wiphy); |
038659e7 | 1465 | reg_process_ht_flags(wiphy); |
0e3802db | 1466 | reg_call_notifier(wiphy, lr); |
b2e1b302 LR |
1467 | } |
1468 | ||
d7549cbb SN |
1469 | static void update_all_wiphy_regulatory(enum nl80211_reg_initiator initiator) |
1470 | { | |
1471 | struct cfg80211_registered_device *rdev; | |
4a38994f | 1472 | struct wiphy *wiphy; |
d7549cbb | 1473 | |
5fe231e8 | 1474 | ASSERT_RTNL(); |
458f4f9e | 1475 | |
4a38994f RM |
1476 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) { |
1477 | wiphy = &rdev->wiphy; | |
1478 | wiphy_update_regulatory(wiphy, initiator); | |
4a38994f | 1479 | } |
d7549cbb SN |
1480 | } |
1481 | ||
1fa25e41 | 1482 | static void handle_channel_custom(struct wiphy *wiphy, |
fdc9d7b2 | 1483 | struct ieee80211_channel *chan, |
1fa25e41 LR |
1484 | const struct ieee80211_regdomain *regd) |
1485 | { | |
038659e7 | 1486 | u32 bw_flags = 0; |
1fa25e41 LR |
1487 | const struct ieee80211_reg_rule *reg_rule = NULL; |
1488 | const struct ieee80211_power_rule *power_rule = NULL; | |
038659e7 | 1489 | const struct ieee80211_freq_range *freq_range = NULL; |
97524820 | 1490 | u32 max_bandwidth_khz; |
ac46d48e | 1491 | |
361c9c8b JB |
1492 | reg_rule = freq_reg_info_regd(wiphy, MHZ_TO_KHZ(chan->center_freq), |
1493 | regd); | |
1fa25e41 | 1494 | |
361c9c8b | 1495 | if (IS_ERR(reg_rule)) { |
fe7ef5e9 JB |
1496 | REG_DBG_PRINT("Disabling freq %d MHz as custom regd has no rule that fits it\n", |
1497 | chan->center_freq); | |
cc493e4f LR |
1498 | chan->orig_flags |= IEEE80211_CHAN_DISABLED; |
1499 | chan->flags = chan->orig_flags; | |
1fa25e41 LR |
1500 | return; |
1501 | } | |
1502 | ||
b0dfd2ea | 1503 | chan_reg_rule_print_dbg(regd, chan, reg_rule); |
e702d3cf | 1504 | |
1fa25e41 | 1505 | power_rule = ®_rule->power_rule; |
038659e7 LR |
1506 | freq_range = ®_rule->freq_range; |
1507 | ||
97524820 JD |
1508 | max_bandwidth_khz = freq_range->max_bandwidth_khz; |
1509 | /* Check if auto calculation requested */ | |
b0dfd2ea | 1510 | if (reg_rule->flags & NL80211_RRF_AUTO_BW) |
97524820 JD |
1511 | max_bandwidth_khz = reg_get_max_bandwidth(regd, reg_rule); |
1512 | ||
1513 | if (max_bandwidth_khz < MHZ_TO_KHZ(40)) | |
038659e7 | 1514 | bw_flags = IEEE80211_CHAN_NO_HT40; |
97524820 | 1515 | if (max_bandwidth_khz < MHZ_TO_KHZ(80)) |
c7a6ee27 | 1516 | bw_flags |= IEEE80211_CHAN_NO_80MHZ; |
97524820 | 1517 | if (max_bandwidth_khz < MHZ_TO_KHZ(160)) |
c7a6ee27 | 1518 | bw_flags |= IEEE80211_CHAN_NO_160MHZ; |
1fa25e41 | 1519 | |
038659e7 | 1520 | chan->flags |= map_regdom_flags(reg_rule->flags) | bw_flags; |
1fa25e41 | 1521 | chan->max_antenna_gain = (int) MBI_TO_DBI(power_rule->max_antenna_gain); |
279f0f55 FF |
1522 | chan->max_reg_power = chan->max_power = |
1523 | (int) MBM_TO_DBM(power_rule->max_eirp); | |
1fa25e41 LR |
1524 | } |
1525 | ||
fdc9d7b2 JB |
1526 | static void handle_band_custom(struct wiphy *wiphy, |
1527 | struct ieee80211_supported_band *sband, | |
1fa25e41 LR |
1528 | const struct ieee80211_regdomain *regd) |
1529 | { | |
1530 | unsigned int i; | |
1fa25e41 | 1531 | |
fdc9d7b2 JB |
1532 | if (!sband) |
1533 | return; | |
1fa25e41 LR |
1534 | |
1535 | for (i = 0; i < sband->n_channels; i++) | |
fdc9d7b2 | 1536 | handle_channel_custom(wiphy, &sband->channels[i], regd); |
1fa25e41 LR |
1537 | } |
1538 | ||
1539 | /* Used by drivers prior to wiphy registration */ | |
1540 | void wiphy_apply_custom_regulatory(struct wiphy *wiphy, | |
1541 | const struct ieee80211_regdomain *regd) | |
1542 | { | |
1543 | enum ieee80211_band band; | |
bbcf3f02 | 1544 | unsigned int bands_set = 0; |
ac46d48e | 1545 | |
a2f73b6c LR |
1546 | WARN(!(wiphy->regulatory_flags & REGULATORY_CUSTOM_REG), |
1547 | "wiphy should have REGULATORY_CUSTOM_REG\n"); | |
1548 | wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG; | |
222ea581 | 1549 | |
1fa25e41 | 1550 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) { |
bbcf3f02 LR |
1551 | if (!wiphy->bands[band]) |
1552 | continue; | |
fdc9d7b2 | 1553 | handle_band_custom(wiphy, wiphy->bands[band], regd); |
bbcf3f02 | 1554 | bands_set++; |
b2e1b302 | 1555 | } |
bbcf3f02 LR |
1556 | |
1557 | /* | |
1558 | * no point in calling this if it won't have any effect | |
1a919318 | 1559 | * on your device's supported bands. |
bbcf3f02 LR |
1560 | */ |
1561 | WARN_ON(!bands_set); | |
b2e1b302 | 1562 | } |
1fa25e41 LR |
1563 | EXPORT_SYMBOL(wiphy_apply_custom_regulatory); |
1564 | ||
b2e253cf LR |
1565 | static void reg_set_request_processed(void) |
1566 | { | |
1567 | bool need_more_processing = false; | |
c492db37 | 1568 | struct regulatory_request *lr = get_last_request(); |
b2e253cf | 1569 | |
c492db37 | 1570 | lr->processed = true; |
b2e253cf LR |
1571 | |
1572 | spin_lock(®_requests_lock); | |
1573 | if (!list_empty(®_requests_list)) | |
1574 | need_more_processing = true; | |
1575 | spin_unlock(®_requests_lock); | |
1576 | ||
c492db37 | 1577 | if (lr->initiator == NL80211_REGDOM_SET_BY_USER) |
fe20b39e | 1578 | cancel_delayed_work(®_timeout); |
a90c7a31 | 1579 | |
b2e253cf LR |
1580 | if (need_more_processing) |
1581 | schedule_work(®_work); | |
1582 | } | |
1583 | ||
b3eb7f3f LR |
1584 | /** |
1585 | * reg_process_hint_core - process core regulatory requests | |
1586 | * @pending_request: a pending core regulatory request | |
1587 | * | |
1588 | * The wireless subsystem can use this function to process | |
1589 | * a regulatory request issued by the regulatory core. | |
1590 | * | |
1591 | * Returns one of the different reg request treatment values. | |
1592 | */ | |
1593 | static enum reg_request_treatment | |
1594 | reg_process_hint_core(struct regulatory_request *core_request) | |
1595 | { | |
b3eb7f3f LR |
1596 | |
1597 | core_request->intersect = false; | |
1598 | core_request->processed = false; | |
5ad6ef5e | 1599 | |
05f1a3ea | 1600 | reg_update_last_request(core_request); |
b3eb7f3f | 1601 | |
fe6631ff | 1602 | return reg_call_crda(core_request); |
b3eb7f3f LR |
1603 | } |
1604 | ||
0d97a619 LR |
1605 | static enum reg_request_treatment |
1606 | __reg_process_hint_user(struct regulatory_request *user_request) | |
1607 | { | |
1608 | struct regulatory_request *lr = get_last_request(); | |
1609 | ||
52616f2b IP |
1610 | if (reg_request_indoor(user_request)) { |
1611 | reg_is_indoor = true; | |
1612 | return REG_REQ_USER_HINT_HANDLED; | |
1613 | } | |
1614 | ||
0d97a619 LR |
1615 | if (reg_request_cell_base(user_request)) |
1616 | return reg_ignore_cell_hint(user_request); | |
1617 | ||
1618 | if (reg_request_cell_base(lr)) | |
1619 | return REG_REQ_IGNORE; | |
1620 | ||
1621 | if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) | |
1622 | return REG_REQ_INTERSECT; | |
1623 | /* | |
1624 | * If the user knows better the user should set the regdom | |
1625 | * to their country before the IE is picked up | |
1626 | */ | |
1627 | if (lr->initiator == NL80211_REGDOM_SET_BY_USER && | |
1628 | lr->intersect) | |
1629 | return REG_REQ_IGNORE; | |
1630 | /* | |
1631 | * Process user requests only after previous user/driver/core | |
1632 | * requests have been processed | |
1633 | */ | |
1634 | if ((lr->initiator == NL80211_REGDOM_SET_BY_CORE || | |
1635 | lr->initiator == NL80211_REGDOM_SET_BY_DRIVER || | |
1636 | lr->initiator == NL80211_REGDOM_SET_BY_USER) && | |
1637 | regdom_changes(lr->alpha2)) | |
1638 | return REG_REQ_IGNORE; | |
1639 | ||
1640 | if (!regdom_changes(user_request->alpha2)) | |
1641 | return REG_REQ_ALREADY_SET; | |
1642 | ||
1643 | return REG_REQ_OK; | |
1644 | } | |
1645 | ||
1646 | /** | |
1647 | * reg_process_hint_user - process user regulatory requests | |
1648 | * @user_request: a pending user regulatory request | |
1649 | * | |
1650 | * The wireless subsystem can use this function to process | |
1651 | * a regulatory request initiated by userspace. | |
1652 | * | |
1653 | * Returns one of the different reg request treatment values. | |
1654 | */ | |
1655 | static enum reg_request_treatment | |
1656 | reg_process_hint_user(struct regulatory_request *user_request) | |
1657 | { | |
1658 | enum reg_request_treatment treatment; | |
0d97a619 LR |
1659 | |
1660 | treatment = __reg_process_hint_user(user_request); | |
1661 | if (treatment == REG_REQ_IGNORE || | |
52616f2b IP |
1662 | treatment == REG_REQ_ALREADY_SET || |
1663 | treatment == REG_REQ_USER_HINT_HANDLED) { | |
0d97a619 LR |
1664 | kfree(user_request); |
1665 | return treatment; | |
1666 | } | |
1667 | ||
0d97a619 LR |
1668 | user_request->intersect = treatment == REG_REQ_INTERSECT; |
1669 | user_request->processed = false; | |
5ad6ef5e | 1670 | |
05f1a3ea | 1671 | reg_update_last_request(user_request); |
0d97a619 LR |
1672 | |
1673 | user_alpha2[0] = user_request->alpha2[0]; | |
1674 | user_alpha2[1] = user_request->alpha2[1]; | |
1675 | ||
fe6631ff | 1676 | return reg_call_crda(user_request); |
0d97a619 LR |
1677 | } |
1678 | ||
21636c7f LR |
1679 | static enum reg_request_treatment |
1680 | __reg_process_hint_driver(struct regulatory_request *driver_request) | |
1681 | { | |
1682 | struct regulatory_request *lr = get_last_request(); | |
1683 | ||
1684 | if (lr->initiator == NL80211_REGDOM_SET_BY_CORE) { | |
1685 | if (regdom_changes(driver_request->alpha2)) | |
1686 | return REG_REQ_OK; | |
1687 | return REG_REQ_ALREADY_SET; | |
1688 | } | |
1689 | ||
1690 | /* | |
1691 | * This would happen if you unplug and plug your card | |
1692 | * back in or if you add a new device for which the previously | |
1693 | * loaded card also agrees on the regulatory domain. | |
1694 | */ | |
1695 | if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER && | |
1696 | !regdom_changes(driver_request->alpha2)) | |
1697 | return REG_REQ_ALREADY_SET; | |
1698 | ||
1699 | return REG_REQ_INTERSECT; | |
1700 | } | |
1701 | ||
1702 | /** | |
1703 | * reg_process_hint_driver - process driver regulatory requests | |
1704 | * @driver_request: a pending driver regulatory request | |
1705 | * | |
1706 | * The wireless subsystem can use this function to process | |
1707 | * a regulatory request issued by an 802.11 driver. | |
1708 | * | |
1709 | * Returns one of the different reg request treatment values. | |
1710 | */ | |
1711 | static enum reg_request_treatment | |
1712 | reg_process_hint_driver(struct wiphy *wiphy, | |
1713 | struct regulatory_request *driver_request) | |
1714 | { | |
1715 | const struct ieee80211_regdomain *regd; | |
1716 | enum reg_request_treatment treatment; | |
21636c7f LR |
1717 | |
1718 | treatment = __reg_process_hint_driver(driver_request); | |
1719 | ||
1720 | switch (treatment) { | |
1721 | case REG_REQ_OK: | |
1722 | break; | |
1723 | case REG_REQ_IGNORE: | |
52616f2b | 1724 | case REG_REQ_USER_HINT_HANDLED: |
21636c7f LR |
1725 | kfree(driver_request); |
1726 | return treatment; | |
1727 | case REG_REQ_INTERSECT: | |
1728 | /* fall through */ | |
1729 | case REG_REQ_ALREADY_SET: | |
1730 | regd = reg_copy_regd(get_cfg80211_regdom()); | |
1731 | if (IS_ERR(regd)) { | |
1732 | kfree(driver_request); | |
1733 | return REG_REQ_IGNORE; | |
1734 | } | |
1735 | rcu_assign_pointer(wiphy->regd, regd); | |
1736 | } | |
1737 | ||
21636c7f LR |
1738 | |
1739 | driver_request->intersect = treatment == REG_REQ_INTERSECT; | |
1740 | driver_request->processed = false; | |
5ad6ef5e | 1741 | |
05f1a3ea | 1742 | reg_update_last_request(driver_request); |
21636c7f LR |
1743 | |
1744 | /* | |
1745 | * Since CRDA will not be called in this case as we already | |
1746 | * have applied the requested regulatory domain before we just | |
1747 | * inform userspace we have processed the request | |
1748 | */ | |
1749 | if (treatment == REG_REQ_ALREADY_SET) { | |
1750 | nl80211_send_reg_change_event(driver_request); | |
1751 | reg_set_request_processed(); | |
1752 | return treatment; | |
1753 | } | |
1754 | ||
fe6631ff | 1755 | return reg_call_crda(driver_request); |
21636c7f LR |
1756 | } |
1757 | ||
b23e7a9e LR |
1758 | static enum reg_request_treatment |
1759 | __reg_process_hint_country_ie(struct wiphy *wiphy, | |
1760 | struct regulatory_request *country_ie_request) | |
1761 | { | |
1762 | struct wiphy *last_wiphy = NULL; | |
1763 | struct regulatory_request *lr = get_last_request(); | |
1764 | ||
1765 | if (reg_request_cell_base(lr)) { | |
1766 | /* Trust a Cell base station over the AP's country IE */ | |
1767 | if (regdom_changes(country_ie_request->alpha2)) | |
1768 | return REG_REQ_IGNORE; | |
1769 | return REG_REQ_ALREADY_SET; | |
2a901468 LR |
1770 | } else { |
1771 | if (wiphy->regulatory_flags & REGULATORY_COUNTRY_IE_IGNORE) | |
1772 | return REG_REQ_IGNORE; | |
b23e7a9e LR |
1773 | } |
1774 | ||
b23e7a9e LR |
1775 | if (unlikely(!is_an_alpha2(country_ie_request->alpha2))) |
1776 | return -EINVAL; | |
2f1c6c57 LR |
1777 | |
1778 | if (lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE) | |
1779 | return REG_REQ_OK; | |
1780 | ||
1781 | last_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx); | |
1782 | ||
1783 | if (last_wiphy != wiphy) { | |
b23e7a9e | 1784 | /* |
2f1c6c57 LR |
1785 | * Two cards with two APs claiming different |
1786 | * Country IE alpha2s. We could | |
1787 | * intersect them, but that seems unlikely | |
1788 | * to be correct. Reject second one for now. | |
b23e7a9e | 1789 | */ |
2f1c6c57 LR |
1790 | if (regdom_changes(country_ie_request->alpha2)) |
1791 | return REG_REQ_IGNORE; | |
b23e7a9e LR |
1792 | return REG_REQ_ALREADY_SET; |
1793 | } | |
2f1c6c57 LR |
1794 | /* |
1795 | * Two consecutive Country IE hints on the same wiphy. | |
1796 | * This should be picked up early by the driver/stack | |
1797 | */ | |
1798 | if (WARN_ON(regdom_changes(country_ie_request->alpha2))) | |
1799 | return REG_REQ_OK; | |
1800 | return REG_REQ_ALREADY_SET; | |
b23e7a9e LR |
1801 | } |
1802 | ||
d1c96a9a | 1803 | /** |
b23e7a9e LR |
1804 | * reg_process_hint_country_ie - process regulatory requests from country IEs |
1805 | * @country_ie_request: a regulatory request from a country IE | |
d1c96a9a | 1806 | * |
b23e7a9e LR |
1807 | * The wireless subsystem can use this function to process |
1808 | * a regulatory request issued by a country Information Element. | |
d1c96a9a | 1809 | * |
2f92212b | 1810 | * Returns one of the different reg request treatment values. |
d1c96a9a | 1811 | */ |
2f92212b | 1812 | static enum reg_request_treatment |
b23e7a9e LR |
1813 | reg_process_hint_country_ie(struct wiphy *wiphy, |
1814 | struct regulatory_request *country_ie_request) | |
b2e1b302 | 1815 | { |
2f92212b | 1816 | enum reg_request_treatment treatment; |
761cf7ec | 1817 | |
b23e7a9e | 1818 | treatment = __reg_process_hint_country_ie(wiphy, country_ie_request); |
9c96477d | 1819 | |
2f92212b | 1820 | switch (treatment) { |
2f92212b JB |
1821 | case REG_REQ_OK: |
1822 | break; | |
b23e7a9e | 1823 | case REG_REQ_IGNORE: |
52616f2b | 1824 | case REG_REQ_USER_HINT_HANDLED: |
b23e7a9e LR |
1825 | /* fall through */ |
1826 | case REG_REQ_ALREADY_SET: | |
1827 | kfree(country_ie_request); | |
1828 | return treatment; | |
1829 | case REG_REQ_INTERSECT: | |
1830 | kfree(country_ie_request); | |
fb1fc7ad | 1831 | /* |
b23e7a9e LR |
1832 | * This doesn't happen yet, not sure we |
1833 | * ever want to support it for this case. | |
fb1fc7ad | 1834 | */ |
b23e7a9e LR |
1835 | WARN_ONCE(1, "Unexpected intersection for country IEs"); |
1836 | return REG_REQ_IGNORE; | |
3e0c3ff3 | 1837 | } |
b2e1b302 | 1838 | |
b23e7a9e LR |
1839 | country_ie_request->intersect = false; |
1840 | country_ie_request->processed = false; | |
5ad6ef5e | 1841 | |
05f1a3ea | 1842 | reg_update_last_request(country_ie_request); |
3e0c3ff3 | 1843 | |
fe6631ff | 1844 | return reg_call_crda(country_ie_request); |
b2e1b302 LR |
1845 | } |
1846 | ||
30a548c7 | 1847 | /* This processes *all* regulatory hints */ |
1daa37c7 | 1848 | static void reg_process_hint(struct regulatory_request *reg_request) |
fe33eb39 | 1849 | { |
fe33eb39 | 1850 | struct wiphy *wiphy = NULL; |
b3eb7f3f | 1851 | enum reg_request_treatment treatment; |
fe33eb39 | 1852 | |
f4173766 | 1853 | if (reg_request->wiphy_idx != WIPHY_IDX_INVALID) |
fe33eb39 LR |
1854 | wiphy = wiphy_idx_to_wiphy(reg_request->wiphy_idx); |
1855 | ||
b3eb7f3f LR |
1856 | switch (reg_request->initiator) { |
1857 | case NL80211_REGDOM_SET_BY_CORE: | |
1858 | reg_process_hint_core(reg_request); | |
1859 | return; | |
1860 | case NL80211_REGDOM_SET_BY_USER: | |
0d97a619 | 1861 | treatment = reg_process_hint_user(reg_request); |
50c11eb9 | 1862 | if (treatment == REG_REQ_IGNORE || |
0d97a619 LR |
1863 | treatment == REG_REQ_ALREADY_SET) |
1864 | return; | |
845f3351 SD |
1865 | queue_delayed_work(system_power_efficient_wq, |
1866 | ®_timeout, msecs_to_jiffies(3142)); | |
0d97a619 | 1867 | return; |
b3eb7f3f | 1868 | case NL80211_REGDOM_SET_BY_DRIVER: |
772f0389 IP |
1869 | if (!wiphy) |
1870 | goto out_free; | |
21636c7f LR |
1871 | treatment = reg_process_hint_driver(wiphy, reg_request); |
1872 | break; | |
b3eb7f3f | 1873 | case NL80211_REGDOM_SET_BY_COUNTRY_IE: |
772f0389 IP |
1874 | if (!wiphy) |
1875 | goto out_free; | |
b23e7a9e | 1876 | treatment = reg_process_hint_country_ie(wiphy, reg_request); |
b3eb7f3f LR |
1877 | break; |
1878 | default: | |
1879 | WARN(1, "invalid initiator %d\n", reg_request->initiator); | |
772f0389 | 1880 | goto out_free; |
b3eb7f3f LR |
1881 | } |
1882 | ||
b23e7a9e LR |
1883 | /* This is required so that the orig_* parameters are saved */ |
1884 | if (treatment == REG_REQ_ALREADY_SET && wiphy && | |
a2f73b6c | 1885 | wiphy->regulatory_flags & REGULATORY_STRICT_REG) |
b23e7a9e | 1886 | wiphy_update_regulatory(wiphy, reg_request->initiator); |
772f0389 IP |
1887 | |
1888 | return; | |
1889 | ||
1890 | out_free: | |
1891 | kfree(reg_request); | |
fe33eb39 LR |
1892 | } |
1893 | ||
b2e253cf LR |
1894 | /* |
1895 | * Processes regulatory hints, this is all the NL80211_REGDOM_SET_BY_* | |
1896 | * Regulatory hints come on a first come first serve basis and we | |
1897 | * must process each one atomically. | |
1898 | */ | |
fe33eb39 | 1899 | static void reg_process_pending_hints(void) |
b0e2880b | 1900 | { |
c492db37 | 1901 | struct regulatory_request *reg_request, *lr; |
fe33eb39 | 1902 | |
c492db37 | 1903 | lr = get_last_request(); |
b0e2880b | 1904 | |
b2e253cf | 1905 | /* When last_request->processed becomes true this will be rescheduled */ |
c492db37 | 1906 | if (lr && !lr->processed) { |
1a919318 | 1907 | REG_DBG_PRINT("Pending regulatory request, waiting for it to be processed...\n"); |
5fe231e8 | 1908 | return; |
b2e253cf LR |
1909 | } |
1910 | ||
fe33eb39 | 1911 | spin_lock(®_requests_lock); |
fe33eb39 | 1912 | |
b2e253cf | 1913 | if (list_empty(®_requests_list)) { |
d951c1dd | 1914 | spin_unlock(®_requests_lock); |
5fe231e8 | 1915 | return; |
fe33eb39 | 1916 | } |
b2e253cf LR |
1917 | |
1918 | reg_request = list_first_entry(®_requests_list, | |
1919 | struct regulatory_request, | |
1920 | list); | |
1921 | list_del_init(®_request->list); | |
1922 | ||
fe33eb39 | 1923 | spin_unlock(®_requests_lock); |
b0e2880b | 1924 | |
1daa37c7 | 1925 | reg_process_hint(reg_request); |
fe33eb39 LR |
1926 | } |
1927 | ||
e38f8a7a LR |
1928 | /* Processes beacon hints -- this has nothing to do with country IEs */ |
1929 | static void reg_process_pending_beacon_hints(void) | |
1930 | { | |
79c97e97 | 1931 | struct cfg80211_registered_device *rdev; |
e38f8a7a LR |
1932 | struct reg_beacon *pending_beacon, *tmp; |
1933 | ||
e38f8a7a LR |
1934 | /* This goes through the _pending_ beacon list */ |
1935 | spin_lock_bh(®_pending_beacons_lock); | |
1936 | ||
e38f8a7a LR |
1937 | list_for_each_entry_safe(pending_beacon, tmp, |
1938 | ®_pending_beacons, list) { | |
e38f8a7a LR |
1939 | list_del_init(&pending_beacon->list); |
1940 | ||
1941 | /* Applies the beacon hint to current wiphys */ | |
79c97e97 JB |
1942 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) |
1943 | wiphy_update_new_beacon(&rdev->wiphy, pending_beacon); | |
e38f8a7a LR |
1944 | |
1945 | /* Remembers the beacon hint for new wiphys or reg changes */ | |
1946 | list_add_tail(&pending_beacon->list, ®_beacon_list); | |
1947 | } | |
1948 | ||
1949 | spin_unlock_bh(®_pending_beacons_lock); | |
e38f8a7a LR |
1950 | } |
1951 | ||
fe33eb39 LR |
1952 | static void reg_todo(struct work_struct *work) |
1953 | { | |
5fe231e8 | 1954 | rtnl_lock(); |
fe33eb39 | 1955 | reg_process_pending_hints(); |
e38f8a7a | 1956 | reg_process_pending_beacon_hints(); |
5fe231e8 | 1957 | rtnl_unlock(); |
fe33eb39 LR |
1958 | } |
1959 | ||
fe33eb39 LR |
1960 | static void queue_regulatory_request(struct regulatory_request *request) |
1961 | { | |
d4f2c881 JB |
1962 | request->alpha2[0] = toupper(request->alpha2[0]); |
1963 | request->alpha2[1] = toupper(request->alpha2[1]); | |
c61029c7 | 1964 | |
fe33eb39 LR |
1965 | spin_lock(®_requests_lock); |
1966 | list_add_tail(&request->list, ®_requests_list); | |
1967 | spin_unlock(®_requests_lock); | |
1968 | ||
1969 | schedule_work(®_work); | |
1970 | } | |
1971 | ||
09d989d1 LR |
1972 | /* |
1973 | * Core regulatory hint -- happens during cfg80211_init() | |
1974 | * and when we restore regulatory settings. | |
1975 | */ | |
ba25c141 LR |
1976 | static int regulatory_hint_core(const char *alpha2) |
1977 | { | |
1978 | struct regulatory_request *request; | |
1979 | ||
1a919318 | 1980 | request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); |
ba25c141 LR |
1981 | if (!request) |
1982 | return -ENOMEM; | |
1983 | ||
1984 | request->alpha2[0] = alpha2[0]; | |
1985 | request->alpha2[1] = alpha2[1]; | |
7db90f4a | 1986 | request->initiator = NL80211_REGDOM_SET_BY_CORE; |
ba25c141 | 1987 | |
31e99729 | 1988 | queue_regulatory_request(request); |
5078b2e3 | 1989 | |
fe33eb39 | 1990 | return 0; |
ba25c141 LR |
1991 | } |
1992 | ||
fe33eb39 | 1993 | /* User hints */ |
57b5ce07 LR |
1994 | int regulatory_hint_user(const char *alpha2, |
1995 | enum nl80211_user_reg_hint_type user_reg_hint_type) | |
b2e1b302 | 1996 | { |
fe33eb39 LR |
1997 | struct regulatory_request *request; |
1998 | ||
fdc9d7b2 JB |
1999 | if (WARN_ON(!alpha2)) |
2000 | return -EINVAL; | |
b2e1b302 | 2001 | |
fe33eb39 LR |
2002 | request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); |
2003 | if (!request) | |
2004 | return -ENOMEM; | |
2005 | ||
f4173766 | 2006 | request->wiphy_idx = WIPHY_IDX_INVALID; |
fe33eb39 LR |
2007 | request->alpha2[0] = alpha2[0]; |
2008 | request->alpha2[1] = alpha2[1]; | |
e12822e1 | 2009 | request->initiator = NL80211_REGDOM_SET_BY_USER; |
57b5ce07 | 2010 | request->user_reg_hint_type = user_reg_hint_type; |
fe33eb39 LR |
2011 | |
2012 | queue_regulatory_request(request); | |
2013 | ||
2014 | return 0; | |
2015 | } | |
2016 | ||
52616f2b IP |
2017 | int regulatory_hint_indoor_user(void) |
2018 | { | |
2019 | struct regulatory_request *request; | |
2020 | ||
2021 | request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); | |
2022 | if (!request) | |
2023 | return -ENOMEM; | |
2024 | ||
2025 | request->wiphy_idx = WIPHY_IDX_INVALID; | |
2026 | request->initiator = NL80211_REGDOM_SET_BY_USER; | |
2027 | request->user_reg_hint_type = NL80211_USER_REG_HINT_INDOOR; | |
2028 | queue_regulatory_request(request); | |
2029 | ||
2030 | return 0; | |
2031 | } | |
2032 | ||
fe33eb39 LR |
2033 | /* Driver hints */ |
2034 | int regulatory_hint(struct wiphy *wiphy, const char *alpha2) | |
2035 | { | |
2036 | struct regulatory_request *request; | |
2037 | ||
fdc9d7b2 JB |
2038 | if (WARN_ON(!alpha2 || !wiphy)) |
2039 | return -EINVAL; | |
fe33eb39 | 2040 | |
4f7b9140 LR |
2041 | wiphy->regulatory_flags &= ~REGULATORY_CUSTOM_REG; |
2042 | ||
fe33eb39 LR |
2043 | request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); |
2044 | if (!request) | |
2045 | return -ENOMEM; | |
2046 | ||
2047 | request->wiphy_idx = get_wiphy_idx(wiphy); | |
2048 | ||
fe33eb39 LR |
2049 | request->alpha2[0] = alpha2[0]; |
2050 | request->alpha2[1] = alpha2[1]; | |
7db90f4a | 2051 | request->initiator = NL80211_REGDOM_SET_BY_DRIVER; |
fe33eb39 LR |
2052 | |
2053 | queue_regulatory_request(request); | |
2054 | ||
2055 | return 0; | |
b2e1b302 LR |
2056 | } |
2057 | EXPORT_SYMBOL(regulatory_hint); | |
2058 | ||
789fd033 LR |
2059 | void regulatory_hint_country_ie(struct wiphy *wiphy, enum ieee80211_band band, |
2060 | const u8 *country_ie, u8 country_ie_len) | |
3f2355cb | 2061 | { |
3f2355cb | 2062 | char alpha2[2]; |
3f2355cb | 2063 | enum environment_cap env = ENVIRON_ANY; |
db2424c5 | 2064 | struct regulatory_request *request = NULL, *lr; |
d335fe63 | 2065 | |
3f2355cb LR |
2066 | /* IE len must be evenly divisible by 2 */ |
2067 | if (country_ie_len & 0x01) | |
db2424c5 | 2068 | return; |
3f2355cb LR |
2069 | |
2070 | if (country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN) | |
db2424c5 JB |
2071 | return; |
2072 | ||
2073 | request = kzalloc(sizeof(*request), GFP_KERNEL); | |
2074 | if (!request) | |
2075 | return; | |
3f2355cb | 2076 | |
3f2355cb LR |
2077 | alpha2[0] = country_ie[0]; |
2078 | alpha2[1] = country_ie[1]; | |
2079 | ||
2080 | if (country_ie[2] == 'I') | |
2081 | env = ENVIRON_INDOOR; | |
2082 | else if (country_ie[2] == 'O') | |
2083 | env = ENVIRON_OUTDOOR; | |
2084 | ||
db2424c5 JB |
2085 | rcu_read_lock(); |
2086 | lr = get_last_request(); | |
2087 | ||
2088 | if (unlikely(!lr)) | |
2089 | goto out; | |
2090 | ||
fb1fc7ad | 2091 | /* |
8b19e6ca | 2092 | * We will run this only upon a successful connection on cfg80211. |
4b44c8bc | 2093 | * We leave conflict resolution to the workqueue, where can hold |
5fe231e8 | 2094 | * the RTNL. |
fb1fc7ad | 2095 | */ |
c492db37 JB |
2096 | if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE && |
2097 | lr->wiphy_idx != WIPHY_IDX_INVALID) | |
4b44c8bc | 2098 | goto out; |
3f2355cb | 2099 | |
fe33eb39 | 2100 | request->wiphy_idx = get_wiphy_idx(wiphy); |
4f366c5d JL |
2101 | request->alpha2[0] = alpha2[0]; |
2102 | request->alpha2[1] = alpha2[1]; | |
7db90f4a | 2103 | request->initiator = NL80211_REGDOM_SET_BY_COUNTRY_IE; |
fe33eb39 LR |
2104 | request->country_ie_env = env; |
2105 | ||
fe33eb39 | 2106 | queue_regulatory_request(request); |
db2424c5 | 2107 | request = NULL; |
3f2355cb | 2108 | out: |
db2424c5 JB |
2109 | kfree(request); |
2110 | rcu_read_unlock(); | |
3f2355cb | 2111 | } |
b2e1b302 | 2112 | |
09d989d1 LR |
2113 | static void restore_alpha2(char *alpha2, bool reset_user) |
2114 | { | |
2115 | /* indicates there is no alpha2 to consider for restoration */ | |
2116 | alpha2[0] = '9'; | |
2117 | alpha2[1] = '7'; | |
2118 | ||
2119 | /* The user setting has precedence over the module parameter */ | |
2120 | if (is_user_regdom_saved()) { | |
2121 | /* Unless we're asked to ignore it and reset it */ | |
2122 | if (reset_user) { | |
1a919318 | 2123 | REG_DBG_PRINT("Restoring regulatory settings including user preference\n"); |
09d989d1 LR |
2124 | user_alpha2[0] = '9'; |
2125 | user_alpha2[1] = '7'; | |
2126 | ||
2127 | /* | |
2128 | * If we're ignoring user settings, we still need to | |
2129 | * check the module parameter to ensure we put things | |
2130 | * back as they were for a full restore. | |
2131 | */ | |
2132 | if (!is_world_regdom(ieee80211_regdom)) { | |
1a919318 JB |
2133 | REG_DBG_PRINT("Keeping preference on module parameter ieee80211_regdom: %c%c\n", |
2134 | ieee80211_regdom[0], ieee80211_regdom[1]); | |
09d989d1 LR |
2135 | alpha2[0] = ieee80211_regdom[0]; |
2136 | alpha2[1] = ieee80211_regdom[1]; | |
2137 | } | |
2138 | } else { | |
1a919318 JB |
2139 | REG_DBG_PRINT("Restoring regulatory settings while preserving user preference for: %c%c\n", |
2140 | user_alpha2[0], user_alpha2[1]); | |
09d989d1 LR |
2141 | alpha2[0] = user_alpha2[0]; |
2142 | alpha2[1] = user_alpha2[1]; | |
2143 | } | |
2144 | } else if (!is_world_regdom(ieee80211_regdom)) { | |
1a919318 JB |
2145 | REG_DBG_PRINT("Keeping preference on module parameter ieee80211_regdom: %c%c\n", |
2146 | ieee80211_regdom[0], ieee80211_regdom[1]); | |
09d989d1 LR |
2147 | alpha2[0] = ieee80211_regdom[0]; |
2148 | alpha2[1] = ieee80211_regdom[1]; | |
2149 | } else | |
d91e41b6 | 2150 | REG_DBG_PRINT("Restoring regulatory settings\n"); |
09d989d1 LR |
2151 | } |
2152 | ||
5ce543d1 RM |
2153 | static void restore_custom_reg_settings(struct wiphy *wiphy) |
2154 | { | |
2155 | struct ieee80211_supported_band *sband; | |
2156 | enum ieee80211_band band; | |
2157 | struct ieee80211_channel *chan; | |
2158 | int i; | |
2159 | ||
2160 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) { | |
2161 | sband = wiphy->bands[band]; | |
2162 | if (!sband) | |
2163 | continue; | |
2164 | for (i = 0; i < sband->n_channels; i++) { | |
2165 | chan = &sband->channels[i]; | |
2166 | chan->flags = chan->orig_flags; | |
2167 | chan->max_antenna_gain = chan->orig_mag; | |
2168 | chan->max_power = chan->orig_mpwr; | |
899852af | 2169 | chan->beacon_found = false; |
5ce543d1 RM |
2170 | } |
2171 | } | |
2172 | } | |
2173 | ||
09d989d1 LR |
2174 | /* |
2175 | * Restoring regulatory settings involves ingoring any | |
2176 | * possibly stale country IE information and user regulatory | |
2177 | * settings if so desired, this includes any beacon hints | |
2178 | * learned as we could have traveled outside to another country | |
2179 | * after disconnection. To restore regulatory settings we do | |
2180 | * exactly what we did at bootup: | |
2181 | * | |
2182 | * - send a core regulatory hint | |
2183 | * - send a user regulatory hint if applicable | |
2184 | * | |
2185 | * Device drivers that send a regulatory hint for a specific country | |
2186 | * keep their own regulatory domain on wiphy->regd so that does does | |
2187 | * not need to be remembered. | |
2188 | */ | |
2189 | static void restore_regulatory_settings(bool reset_user) | |
2190 | { | |
2191 | char alpha2[2]; | |
cee0bec5 | 2192 | char world_alpha2[2]; |
09d989d1 | 2193 | struct reg_beacon *reg_beacon, *btmp; |
14609555 LR |
2194 | struct regulatory_request *reg_request, *tmp; |
2195 | LIST_HEAD(tmp_reg_req_list); | |
5ce543d1 | 2196 | struct cfg80211_registered_device *rdev; |
09d989d1 | 2197 | |
5fe231e8 JB |
2198 | ASSERT_RTNL(); |
2199 | ||
52616f2b IP |
2200 | reg_is_indoor = false; |
2201 | ||
2d319867 | 2202 | reset_regdomains(true, &world_regdom); |
09d989d1 LR |
2203 | restore_alpha2(alpha2, reset_user); |
2204 | ||
14609555 LR |
2205 | /* |
2206 | * If there's any pending requests we simply | |
2207 | * stash them to a temporary pending queue and | |
2208 | * add then after we've restored regulatory | |
2209 | * settings. | |
2210 | */ | |
2211 | spin_lock(®_requests_lock); | |
fea9bced JB |
2212 | list_for_each_entry_safe(reg_request, tmp, ®_requests_list, list) { |
2213 | if (reg_request->initiator != NL80211_REGDOM_SET_BY_USER) | |
2214 | continue; | |
2215 | list_move_tail(®_request->list, &tmp_reg_req_list); | |
14609555 LR |
2216 | } |
2217 | spin_unlock(®_requests_lock); | |
2218 | ||
09d989d1 LR |
2219 | /* Clear beacon hints */ |
2220 | spin_lock_bh(®_pending_beacons_lock); | |
fea9bced JB |
2221 | list_for_each_entry_safe(reg_beacon, btmp, ®_pending_beacons, list) { |
2222 | list_del(®_beacon->list); | |
2223 | kfree(reg_beacon); | |
09d989d1 LR |
2224 | } |
2225 | spin_unlock_bh(®_pending_beacons_lock); | |
2226 | ||
fea9bced JB |
2227 | list_for_each_entry_safe(reg_beacon, btmp, ®_beacon_list, list) { |
2228 | list_del(®_beacon->list); | |
2229 | kfree(reg_beacon); | |
09d989d1 LR |
2230 | } |
2231 | ||
2232 | /* First restore to the basic regulatory settings */ | |
379b82f4 JB |
2233 | world_alpha2[0] = cfg80211_world_regdom->alpha2[0]; |
2234 | world_alpha2[1] = cfg80211_world_regdom->alpha2[1]; | |
09d989d1 | 2235 | |
5ce543d1 | 2236 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) { |
a2f73b6c | 2237 | if (rdev->wiphy.regulatory_flags & REGULATORY_CUSTOM_REG) |
5ce543d1 RM |
2238 | restore_custom_reg_settings(&rdev->wiphy); |
2239 | } | |
2240 | ||
cee0bec5 | 2241 | regulatory_hint_core(world_alpha2); |
09d989d1 LR |
2242 | |
2243 | /* | |
2244 | * This restores the ieee80211_regdom module parameter | |
2245 | * preference or the last user requested regulatory | |
2246 | * settings, user regulatory settings takes precedence. | |
2247 | */ | |
2248 | if (is_an_alpha2(alpha2)) | |
57b5ce07 | 2249 | regulatory_hint_user(user_alpha2, NL80211_USER_REG_HINT_USER); |
09d989d1 | 2250 | |
14609555 | 2251 | spin_lock(®_requests_lock); |
11cff96c | 2252 | list_splice_tail_init(&tmp_reg_req_list, ®_requests_list); |
14609555 LR |
2253 | spin_unlock(®_requests_lock); |
2254 | ||
14609555 LR |
2255 | REG_DBG_PRINT("Kicking the queue\n"); |
2256 | ||
2257 | schedule_work(®_work); | |
2258 | } | |
09d989d1 LR |
2259 | |
2260 | void regulatory_hint_disconnect(void) | |
2261 | { | |
1a919318 | 2262 | REG_DBG_PRINT("All devices are disconnected, going to restore regulatory settings\n"); |
09d989d1 LR |
2263 | restore_regulatory_settings(false); |
2264 | } | |
2265 | ||
e38f8a7a LR |
2266 | static bool freq_is_chan_12_13_14(u16 freq) |
2267 | { | |
59eb21a6 BR |
2268 | if (freq == ieee80211_channel_to_frequency(12, IEEE80211_BAND_2GHZ) || |
2269 | freq == ieee80211_channel_to_frequency(13, IEEE80211_BAND_2GHZ) || | |
2270 | freq == ieee80211_channel_to_frequency(14, IEEE80211_BAND_2GHZ)) | |
e38f8a7a LR |
2271 | return true; |
2272 | return false; | |
2273 | } | |
2274 | ||
3ebfa6e7 LR |
2275 | static bool pending_reg_beacon(struct ieee80211_channel *beacon_chan) |
2276 | { | |
2277 | struct reg_beacon *pending_beacon; | |
2278 | ||
2279 | list_for_each_entry(pending_beacon, ®_pending_beacons, list) | |
2280 | if (beacon_chan->center_freq == | |
2281 | pending_beacon->chan.center_freq) | |
2282 | return true; | |
2283 | return false; | |
2284 | } | |
2285 | ||
e38f8a7a LR |
2286 | int regulatory_hint_found_beacon(struct wiphy *wiphy, |
2287 | struct ieee80211_channel *beacon_chan, | |
2288 | gfp_t gfp) | |
2289 | { | |
2290 | struct reg_beacon *reg_beacon; | |
3ebfa6e7 | 2291 | bool processing; |
e38f8a7a | 2292 | |
1a919318 JB |
2293 | if (beacon_chan->beacon_found || |
2294 | beacon_chan->flags & IEEE80211_CHAN_RADAR || | |
e38f8a7a | 2295 | (beacon_chan->band == IEEE80211_BAND_2GHZ && |
1a919318 | 2296 | !freq_is_chan_12_13_14(beacon_chan->center_freq))) |
e38f8a7a LR |
2297 | return 0; |
2298 | ||
3ebfa6e7 LR |
2299 | spin_lock_bh(®_pending_beacons_lock); |
2300 | processing = pending_reg_beacon(beacon_chan); | |
2301 | spin_unlock_bh(®_pending_beacons_lock); | |
2302 | ||
2303 | if (processing) | |
e38f8a7a LR |
2304 | return 0; |
2305 | ||
2306 | reg_beacon = kzalloc(sizeof(struct reg_beacon), gfp); | |
2307 | if (!reg_beacon) | |
2308 | return -ENOMEM; | |
2309 | ||
1a919318 | 2310 | REG_DBG_PRINT("Found new beacon on frequency: %d MHz (Ch %d) on %s\n", |
4113f751 LR |
2311 | beacon_chan->center_freq, |
2312 | ieee80211_frequency_to_channel(beacon_chan->center_freq), | |
2313 | wiphy_name(wiphy)); | |
2314 | ||
e38f8a7a | 2315 | memcpy(®_beacon->chan, beacon_chan, |
1a919318 | 2316 | sizeof(struct ieee80211_channel)); |
e38f8a7a LR |
2317 | |
2318 | /* | |
2319 | * Since we can be called from BH or and non-BH context | |
2320 | * we must use spin_lock_bh() | |
2321 | */ | |
2322 | spin_lock_bh(®_pending_beacons_lock); | |
2323 | list_add_tail(®_beacon->list, ®_pending_beacons); | |
2324 | spin_unlock_bh(®_pending_beacons_lock); | |
2325 | ||
2326 | schedule_work(®_work); | |
2327 | ||
2328 | return 0; | |
2329 | } | |
2330 | ||
a3d2eaf0 | 2331 | static void print_rd_rules(const struct ieee80211_regdomain *rd) |
b2e1b302 LR |
2332 | { |
2333 | unsigned int i; | |
a3d2eaf0 JB |
2334 | const struct ieee80211_reg_rule *reg_rule = NULL; |
2335 | const struct ieee80211_freq_range *freq_range = NULL; | |
2336 | const struct ieee80211_power_rule *power_rule = NULL; | |
089027e5 | 2337 | char bw[32], cac_time[32]; |
b2e1b302 | 2338 | |
089027e5 | 2339 | pr_info(" (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp), (dfs_cac_time)\n"); |
b2e1b302 LR |
2340 | |
2341 | for (i = 0; i < rd->n_reg_rules; i++) { | |
2342 | reg_rule = &rd->reg_rules[i]; | |
2343 | freq_range = ®_rule->freq_range; | |
2344 | power_rule = ®_rule->power_rule; | |
2345 | ||
b0dfd2ea JD |
2346 | if (reg_rule->flags & NL80211_RRF_AUTO_BW) |
2347 | snprintf(bw, sizeof(bw), "%d KHz, %d KHz AUTO", | |
2348 | freq_range->max_bandwidth_khz, | |
97524820 JD |
2349 | reg_get_max_bandwidth(rd, reg_rule)); |
2350 | else | |
b0dfd2ea | 2351 | snprintf(bw, sizeof(bw), "%d KHz", |
97524820 JD |
2352 | freq_range->max_bandwidth_khz); |
2353 | ||
089027e5 JD |
2354 | if (reg_rule->flags & NL80211_RRF_DFS) |
2355 | scnprintf(cac_time, sizeof(cac_time), "%u s", | |
2356 | reg_rule->dfs_cac_ms/1000); | |
2357 | else | |
2358 | scnprintf(cac_time, sizeof(cac_time), "N/A"); | |
2359 | ||
2360 | ||
fb1fc7ad LR |
2361 | /* |
2362 | * There may not be documentation for max antenna gain | |
2363 | * in certain regions | |
2364 | */ | |
b2e1b302 | 2365 | if (power_rule->max_antenna_gain) |
089027e5 | 2366 | pr_info(" (%d KHz - %d KHz @ %s), (%d mBi, %d mBm), (%s)\n", |
b2e1b302 LR |
2367 | freq_range->start_freq_khz, |
2368 | freq_range->end_freq_khz, | |
97524820 | 2369 | bw, |
b2e1b302 | 2370 | power_rule->max_antenna_gain, |
089027e5 JD |
2371 | power_rule->max_eirp, |
2372 | cac_time); | |
b2e1b302 | 2373 | else |
089027e5 | 2374 | pr_info(" (%d KHz - %d KHz @ %s), (N/A, %d mBm), (%s)\n", |
b2e1b302 LR |
2375 | freq_range->start_freq_khz, |
2376 | freq_range->end_freq_khz, | |
97524820 | 2377 | bw, |
089027e5 JD |
2378 | power_rule->max_eirp, |
2379 | cac_time); | |
b2e1b302 LR |
2380 | } |
2381 | } | |
2382 | ||
4c7d3982 | 2383 | bool reg_supported_dfs_region(enum nl80211_dfs_regions dfs_region) |
8b60b078 LR |
2384 | { |
2385 | switch (dfs_region) { | |
2386 | case NL80211_DFS_UNSET: | |
2387 | case NL80211_DFS_FCC: | |
2388 | case NL80211_DFS_ETSI: | |
2389 | case NL80211_DFS_JP: | |
2390 | return true; | |
2391 | default: | |
2392 | REG_DBG_PRINT("Ignoring uknown DFS master region: %d\n", | |
2393 | dfs_region); | |
2394 | return false; | |
2395 | } | |
2396 | } | |
2397 | ||
a3d2eaf0 | 2398 | static void print_regdomain(const struct ieee80211_regdomain *rd) |
b2e1b302 | 2399 | { |
c492db37 | 2400 | struct regulatory_request *lr = get_last_request(); |
b2e1b302 | 2401 | |
3f2355cb | 2402 | if (is_intersected_alpha2(rd->alpha2)) { |
c492db37 | 2403 | if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) { |
79c97e97 | 2404 | struct cfg80211_registered_device *rdev; |
c492db37 | 2405 | rdev = cfg80211_rdev_by_wiphy_idx(lr->wiphy_idx); |
79c97e97 | 2406 | if (rdev) { |
e9c0268f | 2407 | pr_info("Current regulatory domain updated by AP to: %c%c\n", |
79c97e97 JB |
2408 | rdev->country_ie_alpha2[0], |
2409 | rdev->country_ie_alpha2[1]); | |
3f2355cb | 2410 | } else |
e9c0268f | 2411 | pr_info("Current regulatory domain intersected:\n"); |
3f2355cb | 2412 | } else |
e9c0268f | 2413 | pr_info("Current regulatory domain intersected:\n"); |
1a919318 | 2414 | } else if (is_world_regdom(rd->alpha2)) { |
e9c0268f | 2415 | pr_info("World regulatory domain updated:\n"); |
1a919318 | 2416 | } else { |
b2e1b302 | 2417 | if (is_unknown_alpha2(rd->alpha2)) |
e9c0268f | 2418 | pr_info("Regulatory domain changed to driver built-in settings (unknown country)\n"); |
57b5ce07 | 2419 | else { |
c492db37 | 2420 | if (reg_request_cell_base(lr)) |
1a919318 | 2421 | pr_info("Regulatory domain changed to country: %c%c by Cell Station\n", |
57b5ce07 LR |
2422 | rd->alpha2[0], rd->alpha2[1]); |
2423 | else | |
1a919318 | 2424 | pr_info("Regulatory domain changed to country: %c%c\n", |
57b5ce07 LR |
2425 | rd->alpha2[0], rd->alpha2[1]); |
2426 | } | |
b2e1b302 | 2427 | } |
1a919318 | 2428 | |
3ef121b5 | 2429 | pr_info(" DFS Master region: %s", reg_dfs_region_str(rd->dfs_region)); |
b2e1b302 LR |
2430 | print_rd_rules(rd); |
2431 | } | |
2432 | ||
2df78167 | 2433 | static void print_regdomain_info(const struct ieee80211_regdomain *rd) |
b2e1b302 | 2434 | { |
e9c0268f | 2435 | pr_info("Regulatory domain: %c%c\n", rd->alpha2[0], rd->alpha2[1]); |
b2e1b302 LR |
2436 | print_rd_rules(rd); |
2437 | } | |
2438 | ||
3b9e5aca LR |
2439 | static int reg_set_rd_core(const struct ieee80211_regdomain *rd) |
2440 | { | |
2441 | if (!is_world_regdom(rd->alpha2)) | |
2442 | return -EINVAL; | |
2443 | update_world_regdomain(rd); | |
2444 | return 0; | |
2445 | } | |
2446 | ||
84721d44 LR |
2447 | static int reg_set_rd_user(const struct ieee80211_regdomain *rd, |
2448 | struct regulatory_request *user_request) | |
2449 | { | |
2450 | const struct ieee80211_regdomain *intersected_rd = NULL; | |
2451 | ||
84721d44 LR |
2452 | if (!regdom_changes(rd->alpha2)) |
2453 | return -EALREADY; | |
2454 | ||
2455 | if (!is_valid_rd(rd)) { | |
2456 | pr_err("Invalid regulatory domain detected:\n"); | |
2457 | print_regdomain_info(rd); | |
2458 | return -EINVAL; | |
2459 | } | |
2460 | ||
2461 | if (!user_request->intersect) { | |
2462 | reset_regdomains(false, rd); | |
2463 | return 0; | |
2464 | } | |
2465 | ||
2466 | intersected_rd = regdom_intersect(rd, get_cfg80211_regdom()); | |
2467 | if (!intersected_rd) | |
2468 | return -EINVAL; | |
2469 | ||
2470 | kfree(rd); | |
2471 | rd = NULL; | |
2472 | reset_regdomains(false, intersected_rd); | |
2473 | ||
2474 | return 0; | |
2475 | } | |
2476 | ||
f5fe3247 LR |
2477 | static int reg_set_rd_driver(const struct ieee80211_regdomain *rd, |
2478 | struct regulatory_request *driver_request) | |
b2e1b302 | 2479 | { |
e9763c3c | 2480 | const struct ieee80211_regdomain *regd; |
9c96477d | 2481 | const struct ieee80211_regdomain *intersected_rd = NULL; |
f5fe3247 | 2482 | const struct ieee80211_regdomain *tmp; |
806a9e39 | 2483 | struct wiphy *request_wiphy; |
6913b49a | 2484 | |
f5fe3247 | 2485 | if (is_world_regdom(rd->alpha2)) |
b2e1b302 LR |
2486 | return -EINVAL; |
2487 | ||
f5fe3247 LR |
2488 | if (!regdom_changes(rd->alpha2)) |
2489 | return -EALREADY; | |
b2e1b302 | 2490 | |
8375af3b | 2491 | if (!is_valid_rd(rd)) { |
e9c0268f | 2492 | pr_err("Invalid regulatory domain detected:\n"); |
8375af3b LR |
2493 | print_regdomain_info(rd); |
2494 | return -EINVAL; | |
b2e1b302 LR |
2495 | } |
2496 | ||
f5fe3247 LR |
2497 | request_wiphy = wiphy_idx_to_wiphy(driver_request->wiphy_idx); |
2498 | if (!request_wiphy) { | |
845f3351 SD |
2499 | queue_delayed_work(system_power_efficient_wq, |
2500 | ®_timeout, 0); | |
de3584bd JB |
2501 | return -ENODEV; |
2502 | } | |
806a9e39 | 2503 | |
f5fe3247 | 2504 | if (!driver_request->intersect) { |
558f6d32 LR |
2505 | if (request_wiphy->regd) |
2506 | return -EALREADY; | |
3e0c3ff3 | 2507 | |
e9763c3c JB |
2508 | regd = reg_copy_regd(rd); |
2509 | if (IS_ERR(regd)) | |
2510 | return PTR_ERR(regd); | |
3e0c3ff3 | 2511 | |
458f4f9e | 2512 | rcu_assign_pointer(request_wiphy->regd, regd); |
379b82f4 | 2513 | reset_regdomains(false, rd); |
b8295acd LR |
2514 | return 0; |
2515 | } | |
2516 | ||
f5fe3247 LR |
2517 | intersected_rd = regdom_intersect(rd, get_cfg80211_regdom()); |
2518 | if (!intersected_rd) | |
2519 | return -EINVAL; | |
b8295acd | 2520 | |
f5fe3247 LR |
2521 | /* |
2522 | * We can trash what CRDA provided now. | |
2523 | * However if a driver requested this specific regulatory | |
2524 | * domain we keep it for its private use | |
2525 | */ | |
2526 | tmp = get_wiphy_regdom(request_wiphy); | |
2527 | rcu_assign_pointer(request_wiphy->regd, rd); | |
2528 | rcu_free_regdom(tmp); | |
b8295acd | 2529 | |
f5fe3247 | 2530 | rd = NULL; |
b7566fc3 | 2531 | |
f5fe3247 | 2532 | reset_regdomains(false, intersected_rd); |
3e0c3ff3 | 2533 | |
f5fe3247 LR |
2534 | return 0; |
2535 | } | |
2536 | ||
01992406 LR |
2537 | static int reg_set_rd_country_ie(const struct ieee80211_regdomain *rd, |
2538 | struct regulatory_request *country_ie_request) | |
f5fe3247 LR |
2539 | { |
2540 | struct wiphy *request_wiphy; | |
b8295acd | 2541 | |
f5fe3247 LR |
2542 | if (!is_alpha2_set(rd->alpha2) && !is_an_alpha2(rd->alpha2) && |
2543 | !is_unknown_alpha2(rd->alpha2)) | |
2544 | return -EINVAL; | |
b8295acd | 2545 | |
f5fe3247 LR |
2546 | /* |
2547 | * Lets only bother proceeding on the same alpha2 if the current | |
2548 | * rd is non static (it means CRDA was present and was used last) | |
2549 | * and the pending request came in from a country IE | |
2550 | */ | |
2551 | ||
2552 | if (!is_valid_rd(rd)) { | |
2553 | pr_err("Invalid regulatory domain detected:\n"); | |
2554 | print_regdomain_info(rd); | |
2555 | return -EINVAL; | |
9c96477d LR |
2556 | } |
2557 | ||
01992406 | 2558 | request_wiphy = wiphy_idx_to_wiphy(country_ie_request->wiphy_idx); |
f5fe3247 | 2559 | if (!request_wiphy) { |
845f3351 SD |
2560 | queue_delayed_work(system_power_efficient_wq, |
2561 | ®_timeout, 0); | |
f5fe3247 LR |
2562 | return -ENODEV; |
2563 | } | |
b2e1b302 | 2564 | |
01992406 | 2565 | if (country_ie_request->intersect) |
f5fe3247 LR |
2566 | return -EINVAL; |
2567 | ||
2568 | reset_regdomains(false, rd); | |
2569 | return 0; | |
2570 | } | |
b2e1b302 | 2571 | |
fb1fc7ad LR |
2572 | /* |
2573 | * Use this call to set the current regulatory domain. Conflicts with | |
b2e1b302 | 2574 | * multiple drivers can be ironed out later. Caller must've already |
458f4f9e | 2575 | * kmalloc'd the rd structure. |
fb1fc7ad | 2576 | */ |
a3d2eaf0 | 2577 | int set_regdom(const struct ieee80211_regdomain *rd) |
b2e1b302 | 2578 | { |
c492db37 | 2579 | struct regulatory_request *lr; |
092008ab | 2580 | bool user_reset = false; |
b2e1b302 LR |
2581 | int r; |
2582 | ||
3b9e5aca LR |
2583 | if (!reg_is_valid_request(rd->alpha2)) { |
2584 | kfree(rd); | |
2585 | return -EINVAL; | |
2586 | } | |
2587 | ||
c492db37 | 2588 | lr = get_last_request(); |
abc7381b | 2589 | |
b2e1b302 | 2590 | /* Note that this doesn't update the wiphys, this is done below */ |
3b9e5aca LR |
2591 | switch (lr->initiator) { |
2592 | case NL80211_REGDOM_SET_BY_CORE: | |
2593 | r = reg_set_rd_core(rd); | |
2594 | break; | |
2595 | case NL80211_REGDOM_SET_BY_USER: | |
84721d44 | 2596 | r = reg_set_rd_user(rd, lr); |
092008ab | 2597 | user_reset = true; |
84721d44 | 2598 | break; |
3b9e5aca | 2599 | case NL80211_REGDOM_SET_BY_DRIVER: |
f5fe3247 LR |
2600 | r = reg_set_rd_driver(rd, lr); |
2601 | break; | |
3b9e5aca | 2602 | case NL80211_REGDOM_SET_BY_COUNTRY_IE: |
01992406 | 2603 | r = reg_set_rd_country_ie(rd, lr); |
3b9e5aca LR |
2604 | break; |
2605 | default: | |
2606 | WARN(1, "invalid initiator %d\n", lr->initiator); | |
2607 | return -EINVAL; | |
2608 | } | |
2609 | ||
d2372b31 | 2610 | if (r) { |
092008ab JD |
2611 | switch (r) { |
2612 | case -EALREADY: | |
95908535 | 2613 | reg_set_request_processed(); |
092008ab JD |
2614 | break; |
2615 | default: | |
2616 | /* Back to world regulatory in case of errors */ | |
2617 | restore_regulatory_settings(user_reset); | |
2618 | } | |
95908535 | 2619 | |
d2372b31 | 2620 | kfree(rd); |
38fd2143 | 2621 | return r; |
d2372b31 | 2622 | } |
b2e1b302 | 2623 | |
b2e1b302 | 2624 | /* This would make this whole thing pointless */ |
38fd2143 JB |
2625 | if (WARN_ON(!lr->intersect && rd != get_cfg80211_regdom())) |
2626 | return -EINVAL; | |
b2e1b302 LR |
2627 | |
2628 | /* update all wiphys now with the new established regulatory domain */ | |
c492db37 | 2629 | update_all_wiphy_regulatory(lr->initiator); |
b2e1b302 | 2630 | |
458f4f9e | 2631 | print_regdomain(get_cfg80211_regdom()); |
b2e1b302 | 2632 | |
c492db37 | 2633 | nl80211_send_reg_change_event(lr); |
73d54c9e | 2634 | |
b2e253cf LR |
2635 | reg_set_request_processed(); |
2636 | ||
38fd2143 | 2637 | return 0; |
b2e1b302 LR |
2638 | } |
2639 | ||
57b5ce07 LR |
2640 | void wiphy_regulatory_register(struct wiphy *wiphy) |
2641 | { | |
23df0b73 AN |
2642 | struct regulatory_request *lr; |
2643 | ||
57b5ce07 LR |
2644 | if (!reg_dev_ignore_cell_hint(wiphy)) |
2645 | reg_num_devs_support_basehint++; | |
2646 | ||
23df0b73 AN |
2647 | lr = get_last_request(); |
2648 | wiphy_update_regulatory(wiphy, lr->initiator); | |
57b5ce07 LR |
2649 | } |
2650 | ||
bfead080 | 2651 | void wiphy_regulatory_deregister(struct wiphy *wiphy) |
3f2355cb | 2652 | { |
0ad8acaf | 2653 | struct wiphy *request_wiphy = NULL; |
c492db37 | 2654 | struct regulatory_request *lr; |
761cf7ec | 2655 | |
c492db37 | 2656 | lr = get_last_request(); |
abc7381b | 2657 | |
57b5ce07 LR |
2658 | if (!reg_dev_ignore_cell_hint(wiphy)) |
2659 | reg_num_devs_support_basehint--; | |
2660 | ||
458f4f9e | 2661 | rcu_free_regdom(get_wiphy_regdom(wiphy)); |
34dd886c | 2662 | RCU_INIT_POINTER(wiphy->regd, NULL); |
0ef9ccdd | 2663 | |
c492db37 JB |
2664 | if (lr) |
2665 | request_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx); | |
806a9e39 | 2666 | |
0ef9ccdd | 2667 | if (!request_wiphy || request_wiphy != wiphy) |
38fd2143 | 2668 | return; |
0ef9ccdd | 2669 | |
c492db37 JB |
2670 | lr->wiphy_idx = WIPHY_IDX_INVALID; |
2671 | lr->country_ie_env = ENVIRON_ANY; | |
3f2355cb LR |
2672 | } |
2673 | ||
a90c7a31 LR |
2674 | static void reg_timeout_work(struct work_struct *work) |
2675 | { | |
1a919318 | 2676 | REG_DBG_PRINT("Timeout while waiting for CRDA to reply, restoring regulatory settings\n"); |
f77b86d7 | 2677 | rtnl_lock(); |
a90c7a31 | 2678 | restore_regulatory_settings(true); |
f77b86d7 | 2679 | rtnl_unlock(); |
a90c7a31 LR |
2680 | } |
2681 | ||
174e0cd2 IP |
2682 | /* |
2683 | * See http://www.fcc.gov/document/5-ghz-unlicensed-spectrum-unii, for | |
2684 | * UNII band definitions | |
2685 | */ | |
2686 | int cfg80211_get_unii(int freq) | |
2687 | { | |
2688 | /* UNII-1 */ | |
2689 | if (freq >= 5150 && freq <= 5250) | |
2690 | return 0; | |
2691 | ||
2692 | /* UNII-2A */ | |
2693 | if (freq > 5250 && freq <= 5350) | |
2694 | return 1; | |
2695 | ||
2696 | /* UNII-2B */ | |
2697 | if (freq > 5350 && freq <= 5470) | |
2698 | return 2; | |
2699 | ||
2700 | /* UNII-2C */ | |
2701 | if (freq > 5470 && freq <= 5725) | |
2702 | return 3; | |
2703 | ||
2704 | /* UNII-3 */ | |
2705 | if (freq > 5725 && freq <= 5825) | |
2706 | return 4; | |
2707 | ||
2708 | return -EINVAL; | |
2709 | } | |
2710 | ||
c8866e55 IP |
2711 | bool regulatory_indoor_allowed(void) |
2712 | { | |
2713 | return reg_is_indoor; | |
2714 | } | |
2715 | ||
2fcc9f73 | 2716 | int __init regulatory_init(void) |
b2e1b302 | 2717 | { |
bcf4f99b | 2718 | int err = 0; |
734366de | 2719 | |
b2e1b302 LR |
2720 | reg_pdev = platform_device_register_simple("regulatory", 0, NULL, 0); |
2721 | if (IS_ERR(reg_pdev)) | |
2722 | return PTR_ERR(reg_pdev); | |
734366de | 2723 | |
fe33eb39 | 2724 | spin_lock_init(®_requests_lock); |
e38f8a7a | 2725 | spin_lock_init(®_pending_beacons_lock); |
fe33eb39 | 2726 | |
80007efe LR |
2727 | reg_regdb_size_check(); |
2728 | ||
458f4f9e | 2729 | rcu_assign_pointer(cfg80211_regdomain, cfg80211_world_regdom); |
734366de | 2730 | |
09d989d1 LR |
2731 | user_alpha2[0] = '9'; |
2732 | user_alpha2[1] = '7'; | |
2733 | ||
ae9e4b0d | 2734 | /* We always try to get an update for the static regdomain */ |
458f4f9e | 2735 | err = regulatory_hint_core(cfg80211_world_regdom->alpha2); |
ba25c141 | 2736 | if (err) { |
bcf4f99b LR |
2737 | if (err == -ENOMEM) |
2738 | return err; | |
2739 | /* | |
2740 | * N.B. kobject_uevent_env() can fail mainly for when we're out | |
2741 | * memory which is handled and propagated appropriately above | |
2742 | * but it can also fail during a netlink_broadcast() or during | |
2743 | * early boot for call_usermodehelper(). For now treat these | |
2744 | * errors as non-fatal. | |
2745 | */ | |
e9c0268f | 2746 | pr_err("kobject_uevent_env() was unable to call CRDA during init\n"); |
bcf4f99b | 2747 | } |
734366de | 2748 | |
ae9e4b0d LR |
2749 | /* |
2750 | * Finally, if the user set the module parameter treat it | |
2751 | * as a user hint. | |
2752 | */ | |
2753 | if (!is_world_regdom(ieee80211_regdom)) | |
57b5ce07 LR |
2754 | regulatory_hint_user(ieee80211_regdom, |
2755 | NL80211_USER_REG_HINT_USER); | |
ae9e4b0d | 2756 | |
b2e1b302 LR |
2757 | return 0; |
2758 | } | |
2759 | ||
1a919318 | 2760 | void regulatory_exit(void) |
b2e1b302 | 2761 | { |
fe33eb39 | 2762 | struct regulatory_request *reg_request, *tmp; |
e38f8a7a | 2763 | struct reg_beacon *reg_beacon, *btmp; |
fe33eb39 LR |
2764 | |
2765 | cancel_work_sync(®_work); | |
a90c7a31 | 2766 | cancel_delayed_work_sync(®_timeout); |
fe33eb39 | 2767 | |
9027b149 | 2768 | /* Lock to suppress warnings */ |
38fd2143 | 2769 | rtnl_lock(); |
379b82f4 | 2770 | reset_regdomains(true, NULL); |
38fd2143 | 2771 | rtnl_unlock(); |
734366de | 2772 | |
58ebacc6 | 2773 | dev_set_uevent_suppress(®_pdev->dev, true); |
f6037d09 | 2774 | |
b2e1b302 | 2775 | platform_device_unregister(reg_pdev); |
734366de | 2776 | |
fea9bced JB |
2777 | list_for_each_entry_safe(reg_beacon, btmp, ®_pending_beacons, list) { |
2778 | list_del(®_beacon->list); | |
2779 | kfree(reg_beacon); | |
e38f8a7a | 2780 | } |
e38f8a7a | 2781 | |
fea9bced JB |
2782 | list_for_each_entry_safe(reg_beacon, btmp, ®_beacon_list, list) { |
2783 | list_del(®_beacon->list); | |
2784 | kfree(reg_beacon); | |
e38f8a7a LR |
2785 | } |
2786 | ||
fea9bced JB |
2787 | list_for_each_entry_safe(reg_request, tmp, ®_requests_list, list) { |
2788 | list_del(®_request->list); | |
2789 | kfree(reg_request); | |
fe33eb39 | 2790 | } |
8318d78a | 2791 | } |