Commit | Line | Data |
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8318d78a JB |
1 | /* |
2 | * Copyright 2002-2005, Instant802 Networks, Inc. | |
3 | * Copyright 2005-2006, Devicescape Software, Inc. | |
4 | * Copyright 2007 Johannes Berg <johannes@sipsolutions.net> | |
3b77d5ec | 5 | * Copyright 2008-2011 Luis R. Rodriguez <mcgrof@qca.qualcomm.com> |
2740f0cf | 6 | * Copyright 2013-2014 Intel Mobile Communications GmbH |
8318d78a | 7 | * |
3b77d5ec LR |
8 | * Permission to use, copy, modify, and/or distribute this software for any |
9 | * purpose with or without fee is hereby granted, provided that the above | |
10 | * copyright notice and this permission notice appear in all copies. | |
11 | * | |
12 | * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES | |
13 | * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF | |
14 | * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR | |
15 | * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES | |
16 | * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN | |
17 | * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF | |
18 | * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. | |
8318d78a JB |
19 | */ |
20 | ||
3b77d5ec | 21 | |
b2e1b302 LR |
22 | /** |
23 | * DOC: Wireless regulatory infrastructure | |
8318d78a JB |
24 | * |
25 | * The usual implementation is for a driver to read a device EEPROM to | |
26 | * determine which regulatory domain it should be operating under, then | |
27 | * looking up the allowable channels in a driver-local table and finally | |
28 | * registering those channels in the wiphy structure. | |
29 | * | |
b2e1b302 LR |
30 | * Another set of compliance enforcement is for drivers to use their |
31 | * own compliance limits which can be stored on the EEPROM. The host | |
32 | * driver or firmware may ensure these are used. | |
33 | * | |
34 | * In addition to all this we provide an extra layer of regulatory | |
35 | * conformance. For drivers which do not have any regulatory | |
36 | * information CRDA provides the complete regulatory solution. | |
37 | * For others it provides a community effort on further restrictions | |
38 | * to enhance compliance. | |
39 | * | |
40 | * Note: When number of rules --> infinity we will not be able to | |
41 | * index on alpha2 any more, instead we'll probably have to | |
42 | * rely on some SHA1 checksum of the regdomain for example. | |
43 | * | |
8318d78a | 44 | */ |
e9c0268f JP |
45 | |
46 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt | |
47 | ||
8318d78a | 48 | #include <linux/kernel.h> |
bc3b2d7f | 49 | #include <linux/export.h> |
5a0e3ad6 | 50 | #include <linux/slab.h> |
b2e1b302 | 51 | #include <linux/list.h> |
c61029c7 | 52 | #include <linux/ctype.h> |
b2e1b302 LR |
53 | #include <linux/nl80211.h> |
54 | #include <linux/platform_device.h> | |
d9b93842 | 55 | #include <linux/moduleparam.h> |
b2e1b302 | 56 | #include <net/cfg80211.h> |
8318d78a | 57 | #include "core.h" |
b2e1b302 | 58 | #include "reg.h" |
ad932f04 | 59 | #include "rdev-ops.h" |
3b377ea9 | 60 | #include "regdb.h" |
73d54c9e | 61 | #include "nl80211.h" |
8318d78a | 62 | |
4113f751 | 63 | #ifdef CONFIG_CFG80211_REG_DEBUG |
12c5ffb5 JP |
64 | #define REG_DBG_PRINT(format, args...) \ |
65 | printk(KERN_DEBUG pr_fmt(format), ##args) | |
4113f751 | 66 | #else |
8271195e | 67 | #define REG_DBG_PRINT(args...) |
4113f751 LR |
68 | #endif |
69 | ||
ad932f04 AN |
70 | /* |
71 | * Grace period we give before making sure all current interfaces reside on | |
72 | * channels allowed by the current regulatory domain. | |
73 | */ | |
74 | #define REG_ENFORCE_GRACE_MS 60000 | |
75 | ||
52616f2b IP |
76 | /** |
77 | * enum reg_request_treatment - regulatory request treatment | |
78 | * | |
79 | * @REG_REQ_OK: continue processing the regulatory request | |
80 | * @REG_REQ_IGNORE: ignore the regulatory request | |
81 | * @REG_REQ_INTERSECT: the regulatory domain resulting from this request should | |
82 | * be intersected with the current one. | |
83 | * @REG_REQ_ALREADY_SET: the regulatory request will not change the current | |
84 | * regulatory settings, and no further processing is required. | |
52616f2b | 85 | */ |
2f92212b JB |
86 | enum reg_request_treatment { |
87 | REG_REQ_OK, | |
88 | REG_REQ_IGNORE, | |
89 | REG_REQ_INTERSECT, | |
90 | REG_REQ_ALREADY_SET, | |
91 | }; | |
92 | ||
a042994d LR |
93 | static struct regulatory_request core_request_world = { |
94 | .initiator = NL80211_REGDOM_SET_BY_CORE, | |
95 | .alpha2[0] = '0', | |
96 | .alpha2[1] = '0', | |
97 | .intersect = false, | |
98 | .processed = true, | |
99 | .country_ie_env = ENVIRON_ANY, | |
100 | }; | |
101 | ||
38fd2143 JB |
102 | /* |
103 | * Receipt of information from last regulatory request, | |
104 | * protected by RTNL (and can be accessed with RCU protection) | |
105 | */ | |
c492db37 | 106 | static struct regulatory_request __rcu *last_request = |
cec3f0ed | 107 | (void __force __rcu *)&core_request_world; |
734366de | 108 | |
b2e1b302 LR |
109 | /* To trigger userspace events */ |
110 | static struct platform_device *reg_pdev; | |
8318d78a | 111 | |
fb1fc7ad LR |
112 | /* |
113 | * Central wireless core regulatory domains, we only need two, | |
734366de | 114 | * the current one and a world regulatory domain in case we have no |
e8da2bb4 | 115 | * information to give us an alpha2. |
38fd2143 | 116 | * (protected by RTNL, can be read under RCU) |
fb1fc7ad | 117 | */ |
458f4f9e | 118 | const struct ieee80211_regdomain __rcu *cfg80211_regdomain; |
734366de | 119 | |
57b5ce07 LR |
120 | /* |
121 | * Number of devices that registered to the core | |
122 | * that support cellular base station regulatory hints | |
38fd2143 | 123 | * (protected by RTNL) |
57b5ce07 LR |
124 | */ |
125 | static int reg_num_devs_support_basehint; | |
126 | ||
52616f2b IP |
127 | /* |
128 | * State variable indicating if the platform on which the devices | |
129 | * are attached is operating in an indoor environment. The state variable | |
130 | * is relevant for all registered devices. | |
52616f2b IP |
131 | */ |
132 | static bool reg_is_indoor; | |
05050753 I |
133 | static spinlock_t reg_indoor_lock; |
134 | ||
135 | /* Used to track the userspace process controlling the indoor setting */ | |
136 | static u32 reg_is_indoor_portid; | |
52616f2b | 137 | |
c37722bd I |
138 | /* Max number of consecutive attempts to communicate with CRDA */ |
139 | #define REG_MAX_CRDA_TIMEOUTS 10 | |
140 | ||
141 | static u32 reg_crda_timeouts; | |
142 | ||
458f4f9e JB |
143 | static const struct ieee80211_regdomain *get_cfg80211_regdom(void) |
144 | { | |
38fd2143 | 145 | return rtnl_dereference(cfg80211_regdomain); |
458f4f9e JB |
146 | } |
147 | ||
ad30ca2c | 148 | const struct ieee80211_regdomain *get_wiphy_regdom(struct wiphy *wiphy) |
458f4f9e | 149 | { |
38fd2143 | 150 | return rtnl_dereference(wiphy->regd); |
458f4f9e JB |
151 | } |
152 | ||
3ef121b5 LR |
153 | static const char *reg_dfs_region_str(enum nl80211_dfs_regions dfs_region) |
154 | { | |
155 | switch (dfs_region) { | |
156 | case NL80211_DFS_UNSET: | |
157 | return "unset"; | |
158 | case NL80211_DFS_FCC: | |
159 | return "FCC"; | |
160 | case NL80211_DFS_ETSI: | |
161 | return "ETSI"; | |
162 | case NL80211_DFS_JP: | |
163 | return "JP"; | |
164 | } | |
165 | return "Unknown"; | |
166 | } | |
167 | ||
6c474799 LR |
168 | enum nl80211_dfs_regions reg_get_dfs_region(struct wiphy *wiphy) |
169 | { | |
170 | const struct ieee80211_regdomain *regd = NULL; | |
171 | const struct ieee80211_regdomain *wiphy_regd = NULL; | |
172 | ||
173 | regd = get_cfg80211_regdom(); | |
174 | if (!wiphy) | |
175 | goto out; | |
176 | ||
177 | wiphy_regd = get_wiphy_regdom(wiphy); | |
178 | if (!wiphy_regd) | |
179 | goto out; | |
180 | ||
181 | if (wiphy_regd->dfs_region == regd->dfs_region) | |
182 | goto out; | |
183 | ||
184 | REG_DBG_PRINT("%s: device specific dfs_region " | |
185 | "(%s) disagrees with cfg80211's " | |
186 | "central dfs_region (%s)\n", | |
187 | dev_name(&wiphy->dev), | |
188 | reg_dfs_region_str(wiphy_regd->dfs_region), | |
189 | reg_dfs_region_str(regd->dfs_region)); | |
190 | ||
191 | out: | |
192 | return regd->dfs_region; | |
193 | } | |
194 | ||
458f4f9e JB |
195 | static void rcu_free_regdom(const struct ieee80211_regdomain *r) |
196 | { | |
197 | if (!r) | |
198 | return; | |
199 | kfree_rcu((struct ieee80211_regdomain *)r, rcu_head); | |
200 | } | |
201 | ||
c492db37 JB |
202 | static struct regulatory_request *get_last_request(void) |
203 | { | |
38fd2143 | 204 | return rcu_dereference_rtnl(last_request); |
c492db37 JB |
205 | } |
206 | ||
e38f8a7a | 207 | /* Used to queue up regulatory hints */ |
fe33eb39 LR |
208 | static LIST_HEAD(reg_requests_list); |
209 | static spinlock_t reg_requests_lock; | |
210 | ||
e38f8a7a LR |
211 | /* Used to queue up beacon hints for review */ |
212 | static LIST_HEAD(reg_pending_beacons); | |
213 | static spinlock_t reg_pending_beacons_lock; | |
214 | ||
215 | /* Used to keep track of processed beacon hints */ | |
216 | static LIST_HEAD(reg_beacon_list); | |
217 | ||
218 | struct reg_beacon { | |
219 | struct list_head list; | |
220 | struct ieee80211_channel chan; | |
221 | }; | |
222 | ||
ad932f04 AN |
223 | static void reg_check_chans_work(struct work_struct *work); |
224 | static DECLARE_DELAYED_WORK(reg_check_chans, reg_check_chans_work); | |
225 | ||
f333a7a2 LR |
226 | static void reg_todo(struct work_struct *work); |
227 | static DECLARE_WORK(reg_work, reg_todo); | |
228 | ||
a90c7a31 LR |
229 | static void reg_timeout_work(struct work_struct *work); |
230 | static DECLARE_DELAYED_WORK(reg_timeout, reg_timeout_work); | |
231 | ||
734366de JB |
232 | /* We keep a static world regulatory domain in case of the absence of CRDA */ |
233 | static const struct ieee80211_regdomain world_regdom = { | |
28981e5e | 234 | .n_reg_rules = 8, |
734366de JB |
235 | .alpha2 = "00", |
236 | .reg_rules = { | |
68798a62 LR |
237 | /* IEEE 802.11b/g, channels 1..11 */ |
238 | REG_RULE(2412-10, 2462+10, 40, 6, 20, 0), | |
43c771a1 JB |
239 | /* IEEE 802.11b/g, channels 12..13. */ |
240 | REG_RULE(2467-10, 2472+10, 40, 6, 20, | |
8fe02e16 | 241 | NL80211_RRF_NO_IR), |
611b6a82 LR |
242 | /* IEEE 802.11 channel 14 - Only JP enables |
243 | * this and for 802.11b only */ | |
244 | REG_RULE(2484-10, 2484+10, 20, 6, 20, | |
8fe02e16 | 245 | NL80211_RRF_NO_IR | |
611b6a82 LR |
246 | NL80211_RRF_NO_OFDM), |
247 | /* IEEE 802.11a, channel 36..48 */ | |
131a19bc | 248 | REG_RULE(5180-10, 5240+10, 160, 6, 20, |
8fe02e16 | 249 | NL80211_RRF_NO_IR), |
3fc71f77 | 250 | |
131a19bc JB |
251 | /* IEEE 802.11a, channel 52..64 - DFS required */ |
252 | REG_RULE(5260-10, 5320+10, 160, 6, 20, | |
8fe02e16 | 253 | NL80211_RRF_NO_IR | |
131a19bc JB |
254 | NL80211_RRF_DFS), |
255 | ||
256 | /* IEEE 802.11a, channel 100..144 - DFS required */ | |
257 | REG_RULE(5500-10, 5720+10, 160, 6, 20, | |
8fe02e16 | 258 | NL80211_RRF_NO_IR | |
131a19bc | 259 | NL80211_RRF_DFS), |
3fc71f77 LR |
260 | |
261 | /* IEEE 802.11a, channel 149..165 */ | |
8ab9d85c | 262 | REG_RULE(5745-10, 5825+10, 80, 6, 20, |
8fe02e16 | 263 | NL80211_RRF_NO_IR), |
90cdc6df VK |
264 | |
265 | /* IEEE 802.11ad (60gHz), channels 1..3 */ | |
266 | REG_RULE(56160+2160*1-1080, 56160+2160*3+1080, 2160, 0, 0, 0), | |
734366de JB |
267 | } |
268 | }; | |
269 | ||
38fd2143 | 270 | /* protected by RTNL */ |
a3d2eaf0 JB |
271 | static const struct ieee80211_regdomain *cfg80211_world_regdom = |
272 | &world_regdom; | |
734366de | 273 | |
6ee7d330 | 274 | static char *ieee80211_regdom = "00"; |
09d989d1 | 275 | static char user_alpha2[2]; |
6ee7d330 | 276 | |
734366de JB |
277 | module_param(ieee80211_regdom, charp, 0444); |
278 | MODULE_PARM_DESC(ieee80211_regdom, "IEEE 802.11 regulatory domain code"); | |
279 | ||
c888393b | 280 | static void reg_free_request(struct regulatory_request *request) |
5ad6ef5e | 281 | { |
c888393b AN |
282 | if (request != get_last_request()) |
283 | kfree(request); | |
284 | } | |
285 | ||
286 | static void reg_free_last_request(void) | |
287 | { | |
288 | struct regulatory_request *lr = get_last_request(); | |
289 | ||
5ad6ef5e LR |
290 | if (lr != &core_request_world && lr) |
291 | kfree_rcu(lr, rcu_head); | |
292 | } | |
293 | ||
05f1a3ea LR |
294 | static void reg_update_last_request(struct regulatory_request *request) |
295 | { | |
255e25b0 LR |
296 | struct regulatory_request *lr; |
297 | ||
298 | lr = get_last_request(); | |
299 | if (lr == request) | |
300 | return; | |
301 | ||
c888393b | 302 | reg_free_last_request(); |
05f1a3ea LR |
303 | rcu_assign_pointer(last_request, request); |
304 | } | |
305 | ||
379b82f4 JB |
306 | static void reset_regdomains(bool full_reset, |
307 | const struct ieee80211_regdomain *new_regdom) | |
734366de | 308 | { |
458f4f9e JB |
309 | const struct ieee80211_regdomain *r; |
310 | ||
38fd2143 | 311 | ASSERT_RTNL(); |
e8da2bb4 | 312 | |
458f4f9e JB |
313 | r = get_cfg80211_regdom(); |
314 | ||
942b25cf | 315 | /* avoid freeing static information or freeing something twice */ |
458f4f9e JB |
316 | if (r == cfg80211_world_regdom) |
317 | r = NULL; | |
942b25cf JB |
318 | if (cfg80211_world_regdom == &world_regdom) |
319 | cfg80211_world_regdom = NULL; | |
458f4f9e JB |
320 | if (r == &world_regdom) |
321 | r = NULL; | |
942b25cf | 322 | |
458f4f9e JB |
323 | rcu_free_regdom(r); |
324 | rcu_free_regdom(cfg80211_world_regdom); | |
734366de | 325 | |
a3d2eaf0 | 326 | cfg80211_world_regdom = &world_regdom; |
458f4f9e | 327 | rcu_assign_pointer(cfg80211_regdomain, new_regdom); |
a042994d LR |
328 | |
329 | if (!full_reset) | |
330 | return; | |
331 | ||
05f1a3ea | 332 | reg_update_last_request(&core_request_world); |
734366de JB |
333 | } |
334 | ||
fb1fc7ad LR |
335 | /* |
336 | * Dynamic world regulatory domain requested by the wireless | |
337 | * core upon initialization | |
338 | */ | |
a3d2eaf0 | 339 | static void update_world_regdomain(const struct ieee80211_regdomain *rd) |
734366de | 340 | { |
c492db37 | 341 | struct regulatory_request *lr; |
734366de | 342 | |
c492db37 JB |
343 | lr = get_last_request(); |
344 | ||
345 | WARN_ON(!lr); | |
734366de | 346 | |
379b82f4 | 347 | reset_regdomains(false, rd); |
734366de JB |
348 | |
349 | cfg80211_world_regdom = rd; | |
734366de | 350 | } |
734366de | 351 | |
a3d2eaf0 | 352 | bool is_world_regdom(const char *alpha2) |
b2e1b302 LR |
353 | { |
354 | if (!alpha2) | |
355 | return false; | |
1a919318 | 356 | return alpha2[0] == '0' && alpha2[1] == '0'; |
b2e1b302 | 357 | } |
8318d78a | 358 | |
a3d2eaf0 | 359 | static bool is_alpha2_set(const char *alpha2) |
b2e1b302 LR |
360 | { |
361 | if (!alpha2) | |
362 | return false; | |
1a919318 | 363 | return alpha2[0] && alpha2[1]; |
b2e1b302 | 364 | } |
8318d78a | 365 | |
a3d2eaf0 | 366 | static bool is_unknown_alpha2(const char *alpha2) |
b2e1b302 LR |
367 | { |
368 | if (!alpha2) | |
369 | return false; | |
fb1fc7ad LR |
370 | /* |
371 | * Special case where regulatory domain was built by driver | |
372 | * but a specific alpha2 cannot be determined | |
373 | */ | |
1a919318 | 374 | return alpha2[0] == '9' && alpha2[1] == '9'; |
b2e1b302 | 375 | } |
8318d78a | 376 | |
3f2355cb LR |
377 | static bool is_intersected_alpha2(const char *alpha2) |
378 | { | |
379 | if (!alpha2) | |
380 | return false; | |
fb1fc7ad LR |
381 | /* |
382 | * Special case where regulatory domain is the | |
3f2355cb | 383 | * result of an intersection between two regulatory domain |
fb1fc7ad LR |
384 | * structures |
385 | */ | |
1a919318 | 386 | return alpha2[0] == '9' && alpha2[1] == '8'; |
3f2355cb LR |
387 | } |
388 | ||
a3d2eaf0 | 389 | static bool is_an_alpha2(const char *alpha2) |
b2e1b302 LR |
390 | { |
391 | if (!alpha2) | |
392 | return false; | |
1a919318 | 393 | return isalpha(alpha2[0]) && isalpha(alpha2[1]); |
b2e1b302 | 394 | } |
8318d78a | 395 | |
a3d2eaf0 | 396 | static bool alpha2_equal(const char *alpha2_x, const char *alpha2_y) |
b2e1b302 LR |
397 | { |
398 | if (!alpha2_x || !alpha2_y) | |
399 | return false; | |
1a919318 | 400 | return alpha2_x[0] == alpha2_y[0] && alpha2_x[1] == alpha2_y[1]; |
b2e1b302 LR |
401 | } |
402 | ||
69b1572b | 403 | static bool regdom_changes(const char *alpha2) |
b2e1b302 | 404 | { |
458f4f9e | 405 | const struct ieee80211_regdomain *r = get_cfg80211_regdom(); |
761cf7ec | 406 | |
458f4f9e | 407 | if (!r) |
b2e1b302 | 408 | return true; |
458f4f9e | 409 | return !alpha2_equal(r->alpha2, alpha2); |
b2e1b302 LR |
410 | } |
411 | ||
09d989d1 LR |
412 | /* |
413 | * The NL80211_REGDOM_SET_BY_USER regdom alpha2 is cached, this lets | |
414 | * you know if a valid regulatory hint with NL80211_REGDOM_SET_BY_USER | |
415 | * has ever been issued. | |
416 | */ | |
417 | static bool is_user_regdom_saved(void) | |
418 | { | |
419 | if (user_alpha2[0] == '9' && user_alpha2[1] == '7') | |
420 | return false; | |
421 | ||
422 | /* This would indicate a mistake on the design */ | |
1a919318 | 423 | if (WARN(!is_world_regdom(user_alpha2) && !is_an_alpha2(user_alpha2), |
09d989d1 | 424 | "Unexpected user alpha2: %c%c\n", |
1a919318 | 425 | user_alpha2[0], user_alpha2[1])) |
09d989d1 LR |
426 | return false; |
427 | ||
428 | return true; | |
429 | } | |
430 | ||
e9763c3c JB |
431 | static const struct ieee80211_regdomain * |
432 | reg_copy_regd(const struct ieee80211_regdomain *src_regd) | |
3b377ea9 JL |
433 | { |
434 | struct ieee80211_regdomain *regd; | |
e9763c3c | 435 | int size_of_regd; |
3b377ea9 JL |
436 | unsigned int i; |
437 | ||
82f20856 JB |
438 | size_of_regd = |
439 | sizeof(struct ieee80211_regdomain) + | |
440 | src_regd->n_reg_rules * sizeof(struct ieee80211_reg_rule); | |
3b377ea9 JL |
441 | |
442 | regd = kzalloc(size_of_regd, GFP_KERNEL); | |
443 | if (!regd) | |
e9763c3c | 444 | return ERR_PTR(-ENOMEM); |
3b377ea9 JL |
445 | |
446 | memcpy(regd, src_regd, sizeof(struct ieee80211_regdomain)); | |
447 | ||
448 | for (i = 0; i < src_regd->n_reg_rules; i++) | |
449 | memcpy(®d->reg_rules[i], &src_regd->reg_rules[i], | |
e9763c3c | 450 | sizeof(struct ieee80211_reg_rule)); |
3b377ea9 | 451 | |
e9763c3c | 452 | return regd; |
3b377ea9 JL |
453 | } |
454 | ||
455 | #ifdef CONFIG_CFG80211_INTERNAL_REGDB | |
456 | struct reg_regdb_search_request { | |
457 | char alpha2[2]; | |
458 | struct list_head list; | |
459 | }; | |
460 | ||
461 | static LIST_HEAD(reg_regdb_search_list); | |
368d06f5 | 462 | static DEFINE_MUTEX(reg_regdb_search_mutex); |
3b377ea9 JL |
463 | |
464 | static void reg_regdb_search(struct work_struct *work) | |
465 | { | |
466 | struct reg_regdb_search_request *request; | |
e9763c3c JB |
467 | const struct ieee80211_regdomain *curdom, *regdom = NULL; |
468 | int i; | |
a85d0d7f | 469 | |
5fe231e8 | 470 | rtnl_lock(); |
3b377ea9 | 471 | |
368d06f5 | 472 | mutex_lock(®_regdb_search_mutex); |
3b377ea9 JL |
473 | while (!list_empty(®_regdb_search_list)) { |
474 | request = list_first_entry(®_regdb_search_list, | |
475 | struct reg_regdb_search_request, | |
476 | list); | |
477 | list_del(&request->list); | |
478 | ||
1a919318 | 479 | for (i = 0; i < reg_regdb_size; i++) { |
3b377ea9 JL |
480 | curdom = reg_regdb[i]; |
481 | ||
1a919318 | 482 | if (alpha2_equal(request->alpha2, curdom->alpha2)) { |
e9763c3c | 483 | regdom = reg_copy_regd(curdom); |
3b377ea9 JL |
484 | break; |
485 | } | |
486 | } | |
487 | ||
488 | kfree(request); | |
489 | } | |
368d06f5 | 490 | mutex_unlock(®_regdb_search_mutex); |
a85d0d7f | 491 | |
e9763c3c | 492 | if (!IS_ERR_OR_NULL(regdom)) |
c37722bd | 493 | set_regdom(regdom, REGD_SOURCE_INTERNAL_DB); |
a85d0d7f | 494 | |
5fe231e8 | 495 | rtnl_unlock(); |
3b377ea9 JL |
496 | } |
497 | ||
498 | static DECLARE_WORK(reg_regdb_work, reg_regdb_search); | |
499 | ||
500 | static void reg_regdb_query(const char *alpha2) | |
501 | { | |
502 | struct reg_regdb_search_request *request; | |
503 | ||
504 | if (!alpha2) | |
505 | return; | |
506 | ||
507 | request = kzalloc(sizeof(struct reg_regdb_search_request), GFP_KERNEL); | |
508 | if (!request) | |
509 | return; | |
510 | ||
511 | memcpy(request->alpha2, alpha2, 2); | |
512 | ||
368d06f5 | 513 | mutex_lock(®_regdb_search_mutex); |
3b377ea9 | 514 | list_add_tail(&request->list, ®_regdb_search_list); |
368d06f5 | 515 | mutex_unlock(®_regdb_search_mutex); |
3b377ea9 JL |
516 | |
517 | schedule_work(®_regdb_work); | |
518 | } | |
80007efe LR |
519 | |
520 | /* Feel free to add any other sanity checks here */ | |
521 | static void reg_regdb_size_check(void) | |
522 | { | |
523 | /* We should ideally BUILD_BUG_ON() but then random builds would fail */ | |
524 | WARN_ONCE(!reg_regdb_size, "db.txt is empty, you should update it..."); | |
525 | } | |
3b377ea9 | 526 | #else |
80007efe | 527 | static inline void reg_regdb_size_check(void) {} |
3b377ea9 JL |
528 | static inline void reg_regdb_query(const char *alpha2) {} |
529 | #endif /* CONFIG_CFG80211_INTERNAL_REGDB */ | |
530 | ||
fb1fc7ad LR |
531 | /* |
532 | * This lets us keep regulatory code which is updated on a regulatory | |
1226d258 | 533 | * basis in userspace. |
fb1fc7ad | 534 | */ |
b2e1b302 LR |
535 | static int call_crda(const char *alpha2) |
536 | { | |
1226d258 JB |
537 | char country[12]; |
538 | char *env[] = { country, NULL }; | |
539 | ||
540 | snprintf(country, sizeof(country), "COUNTRY=%c%c", | |
541 | alpha2[0], alpha2[1]); | |
542 | ||
c37722bd I |
543 | /* query internal regulatory database (if it exists) */ |
544 | reg_regdb_query(alpha2); | |
545 | ||
546 | if (reg_crda_timeouts > REG_MAX_CRDA_TIMEOUTS) { | |
042ab5fc | 547 | pr_debug("Exceeded CRDA call max attempts. Not calling CRDA\n"); |
c37722bd I |
548 | return -EINVAL; |
549 | } | |
550 | ||
b2e1b302 | 551 | if (!is_world_regdom((char *) alpha2)) |
042ab5fc | 552 | pr_debug("Calling CRDA for country: %c%c\n", |
b2e1b302 LR |
553 | alpha2[0], alpha2[1]); |
554 | else | |
042ab5fc | 555 | pr_debug("Calling CRDA to update world regulatory domain\n"); |
b2e1b302 | 556 | |
1226d258 | 557 | return kobject_uevent_env(®_pdev->dev.kobj, KOBJ_CHANGE, env); |
b2e1b302 LR |
558 | } |
559 | ||
fe6631ff LR |
560 | static enum reg_request_treatment |
561 | reg_call_crda(struct regulatory_request *request) | |
562 | { | |
563 | if (call_crda(request->alpha2)) | |
564 | return REG_REQ_IGNORE; | |
eeca9fce I |
565 | |
566 | queue_delayed_work(system_power_efficient_wq, | |
567 | ®_timeout, msecs_to_jiffies(3142)); | |
fe6631ff LR |
568 | return REG_REQ_OK; |
569 | } | |
570 | ||
e438768f | 571 | bool reg_is_valid_request(const char *alpha2) |
b2e1b302 | 572 | { |
c492db37 | 573 | struct regulatory_request *lr = get_last_request(); |
61405e97 | 574 | |
c492db37 | 575 | if (!lr || lr->processed) |
f6037d09 JB |
576 | return false; |
577 | ||
c492db37 | 578 | return alpha2_equal(lr->alpha2, alpha2); |
b2e1b302 | 579 | } |
8318d78a | 580 | |
e3961af1 JD |
581 | static const struct ieee80211_regdomain *reg_get_regdomain(struct wiphy *wiphy) |
582 | { | |
583 | struct regulatory_request *lr = get_last_request(); | |
584 | ||
585 | /* | |
586 | * Follow the driver's regulatory domain, if present, unless a country | |
587 | * IE has been processed or a user wants to help complaince further | |
588 | */ | |
589 | if (lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && | |
590 | lr->initiator != NL80211_REGDOM_SET_BY_USER && | |
591 | wiphy->regd) | |
592 | return get_wiphy_regdom(wiphy); | |
593 | ||
594 | return get_cfg80211_regdom(); | |
595 | } | |
596 | ||
a6d4a534 AN |
597 | static unsigned int |
598 | reg_get_max_bandwidth_from_range(const struct ieee80211_regdomain *rd, | |
599 | const struct ieee80211_reg_rule *rule) | |
97524820 JD |
600 | { |
601 | const struct ieee80211_freq_range *freq_range = &rule->freq_range; | |
602 | const struct ieee80211_freq_range *freq_range_tmp; | |
603 | const struct ieee80211_reg_rule *tmp; | |
604 | u32 start_freq, end_freq, idx, no; | |
605 | ||
606 | for (idx = 0; idx < rd->n_reg_rules; idx++) | |
607 | if (rule == &rd->reg_rules[idx]) | |
608 | break; | |
609 | ||
610 | if (idx == rd->n_reg_rules) | |
611 | return 0; | |
612 | ||
613 | /* get start_freq */ | |
614 | no = idx; | |
615 | ||
616 | while (no) { | |
617 | tmp = &rd->reg_rules[--no]; | |
618 | freq_range_tmp = &tmp->freq_range; | |
619 | ||
620 | if (freq_range_tmp->end_freq_khz < freq_range->start_freq_khz) | |
621 | break; | |
622 | ||
97524820 JD |
623 | freq_range = freq_range_tmp; |
624 | } | |
625 | ||
626 | start_freq = freq_range->start_freq_khz; | |
627 | ||
628 | /* get end_freq */ | |
629 | freq_range = &rule->freq_range; | |
630 | no = idx; | |
631 | ||
632 | while (no < rd->n_reg_rules - 1) { | |
633 | tmp = &rd->reg_rules[++no]; | |
634 | freq_range_tmp = &tmp->freq_range; | |
635 | ||
636 | if (freq_range_tmp->start_freq_khz > freq_range->end_freq_khz) | |
637 | break; | |
638 | ||
97524820 JD |
639 | freq_range = freq_range_tmp; |
640 | } | |
641 | ||
642 | end_freq = freq_range->end_freq_khz; | |
643 | ||
644 | return end_freq - start_freq; | |
645 | } | |
646 | ||
a6d4a534 AN |
647 | unsigned int reg_get_max_bandwidth(const struct ieee80211_regdomain *rd, |
648 | const struct ieee80211_reg_rule *rule) | |
649 | { | |
650 | unsigned int bw = reg_get_max_bandwidth_from_range(rd, rule); | |
651 | ||
652 | if (rule->flags & NL80211_RRF_NO_160MHZ) | |
653 | bw = min_t(unsigned int, bw, MHZ_TO_KHZ(80)); | |
654 | if (rule->flags & NL80211_RRF_NO_80MHZ) | |
655 | bw = min_t(unsigned int, bw, MHZ_TO_KHZ(40)); | |
656 | ||
657 | /* | |
658 | * HT40+/HT40- limits are handled per-channel. Only limit BW if both | |
659 | * are not allowed. | |
660 | */ | |
661 | if (rule->flags & NL80211_RRF_NO_HT40MINUS && | |
662 | rule->flags & NL80211_RRF_NO_HT40PLUS) | |
663 | bw = min_t(unsigned int, bw, MHZ_TO_KHZ(20)); | |
664 | ||
665 | return bw; | |
666 | } | |
667 | ||
b2e1b302 | 668 | /* Sanity check on a regulatory rule */ |
a3d2eaf0 | 669 | static bool is_valid_reg_rule(const struct ieee80211_reg_rule *rule) |
8318d78a | 670 | { |
a3d2eaf0 | 671 | const struct ieee80211_freq_range *freq_range = &rule->freq_range; |
b2e1b302 LR |
672 | u32 freq_diff; |
673 | ||
91e99004 | 674 | if (freq_range->start_freq_khz <= 0 || freq_range->end_freq_khz <= 0) |
b2e1b302 LR |
675 | return false; |
676 | ||
677 | if (freq_range->start_freq_khz > freq_range->end_freq_khz) | |
678 | return false; | |
679 | ||
680 | freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz; | |
681 | ||
bd05f28e | 682 | if (freq_range->end_freq_khz <= freq_range->start_freq_khz || |
1a919318 | 683 | freq_range->max_bandwidth_khz > freq_diff) |
b2e1b302 LR |
684 | return false; |
685 | ||
686 | return true; | |
687 | } | |
688 | ||
a3d2eaf0 | 689 | static bool is_valid_rd(const struct ieee80211_regdomain *rd) |
b2e1b302 | 690 | { |
a3d2eaf0 | 691 | const struct ieee80211_reg_rule *reg_rule = NULL; |
b2e1b302 | 692 | unsigned int i; |
8318d78a | 693 | |
b2e1b302 LR |
694 | if (!rd->n_reg_rules) |
695 | return false; | |
8318d78a | 696 | |
88dc1c3f LR |
697 | if (WARN_ON(rd->n_reg_rules > NL80211_MAX_SUPP_REG_RULES)) |
698 | return false; | |
699 | ||
b2e1b302 LR |
700 | for (i = 0; i < rd->n_reg_rules; i++) { |
701 | reg_rule = &rd->reg_rules[i]; | |
702 | if (!is_valid_reg_rule(reg_rule)) | |
703 | return false; | |
704 | } | |
705 | ||
706 | return true; | |
8318d78a JB |
707 | } |
708 | ||
038659e7 | 709 | static bool reg_does_bw_fit(const struct ieee80211_freq_range *freq_range, |
fe7ef5e9 | 710 | u32 center_freq_khz, u32 bw_khz) |
b2e1b302 | 711 | { |
038659e7 LR |
712 | u32 start_freq_khz, end_freq_khz; |
713 | ||
714 | start_freq_khz = center_freq_khz - (bw_khz/2); | |
715 | end_freq_khz = center_freq_khz + (bw_khz/2); | |
716 | ||
717 | if (start_freq_khz >= freq_range->start_freq_khz && | |
718 | end_freq_khz <= freq_range->end_freq_khz) | |
719 | return true; | |
720 | ||
721 | return false; | |
b2e1b302 | 722 | } |
8318d78a | 723 | |
0c7dc45d LR |
724 | /** |
725 | * freq_in_rule_band - tells us if a frequency is in a frequency band | |
726 | * @freq_range: frequency rule we want to query | |
727 | * @freq_khz: frequency we are inquiring about | |
728 | * | |
729 | * This lets us know if a specific frequency rule is or is not relevant to | |
730 | * a specific frequency's band. Bands are device specific and artificial | |
64629b9d VK |
731 | * definitions (the "2.4 GHz band", the "5 GHz band" and the "60GHz band"), |
732 | * however it is safe for now to assume that a frequency rule should not be | |
733 | * part of a frequency's band if the start freq or end freq are off by more | |
734 | * than 2 GHz for the 2.4 and 5 GHz bands, and by more than 10 GHz for the | |
735 | * 60 GHz band. | |
0c7dc45d LR |
736 | * This resolution can be lowered and should be considered as we add |
737 | * regulatory rule support for other "bands". | |
738 | **/ | |
739 | static bool freq_in_rule_band(const struct ieee80211_freq_range *freq_range, | |
1a919318 | 740 | u32 freq_khz) |
0c7dc45d LR |
741 | { |
742 | #define ONE_GHZ_IN_KHZ 1000000 | |
64629b9d VK |
743 | /* |
744 | * From 802.11ad: directional multi-gigabit (DMG): | |
745 | * Pertaining to operation in a frequency band containing a channel | |
746 | * with the Channel starting frequency above 45 GHz. | |
747 | */ | |
748 | u32 limit = freq_khz > 45 * ONE_GHZ_IN_KHZ ? | |
749 | 10 * ONE_GHZ_IN_KHZ : 2 * ONE_GHZ_IN_KHZ; | |
750 | if (abs(freq_khz - freq_range->start_freq_khz) <= limit) | |
0c7dc45d | 751 | return true; |
64629b9d | 752 | if (abs(freq_khz - freq_range->end_freq_khz) <= limit) |
0c7dc45d LR |
753 | return true; |
754 | return false; | |
755 | #undef ONE_GHZ_IN_KHZ | |
756 | } | |
757 | ||
adbfb058 LR |
758 | /* |
759 | * Later on we can perhaps use the more restrictive DFS | |
760 | * region but we don't have information for that yet so | |
761 | * for now simply disallow conflicts. | |
762 | */ | |
763 | static enum nl80211_dfs_regions | |
764 | reg_intersect_dfs_region(const enum nl80211_dfs_regions dfs_region1, | |
765 | const enum nl80211_dfs_regions dfs_region2) | |
766 | { | |
767 | if (dfs_region1 != dfs_region2) | |
768 | return NL80211_DFS_UNSET; | |
769 | return dfs_region1; | |
770 | } | |
771 | ||
fb1fc7ad LR |
772 | /* |
773 | * Helper for regdom_intersect(), this does the real | |
774 | * mathematical intersection fun | |
775 | */ | |
97524820 JD |
776 | static int reg_rules_intersect(const struct ieee80211_regdomain *rd1, |
777 | const struct ieee80211_regdomain *rd2, | |
778 | const struct ieee80211_reg_rule *rule1, | |
1a919318 JB |
779 | const struct ieee80211_reg_rule *rule2, |
780 | struct ieee80211_reg_rule *intersected_rule) | |
9c96477d LR |
781 | { |
782 | const struct ieee80211_freq_range *freq_range1, *freq_range2; | |
783 | struct ieee80211_freq_range *freq_range; | |
784 | const struct ieee80211_power_rule *power_rule1, *power_rule2; | |
785 | struct ieee80211_power_rule *power_rule; | |
97524820 | 786 | u32 freq_diff, max_bandwidth1, max_bandwidth2; |
9c96477d LR |
787 | |
788 | freq_range1 = &rule1->freq_range; | |
789 | freq_range2 = &rule2->freq_range; | |
790 | freq_range = &intersected_rule->freq_range; | |
791 | ||
792 | power_rule1 = &rule1->power_rule; | |
793 | power_rule2 = &rule2->power_rule; | |
794 | power_rule = &intersected_rule->power_rule; | |
795 | ||
796 | freq_range->start_freq_khz = max(freq_range1->start_freq_khz, | |
1a919318 | 797 | freq_range2->start_freq_khz); |
9c96477d | 798 | freq_range->end_freq_khz = min(freq_range1->end_freq_khz, |
1a919318 | 799 | freq_range2->end_freq_khz); |
97524820 JD |
800 | |
801 | max_bandwidth1 = freq_range1->max_bandwidth_khz; | |
802 | max_bandwidth2 = freq_range2->max_bandwidth_khz; | |
803 | ||
b0dfd2ea JD |
804 | if (rule1->flags & NL80211_RRF_AUTO_BW) |
805 | max_bandwidth1 = reg_get_max_bandwidth(rd1, rule1); | |
806 | if (rule2->flags & NL80211_RRF_AUTO_BW) | |
807 | max_bandwidth2 = reg_get_max_bandwidth(rd2, rule2); | |
97524820 JD |
808 | |
809 | freq_range->max_bandwidth_khz = min(max_bandwidth1, max_bandwidth2); | |
9c96477d | 810 | |
b0dfd2ea JD |
811 | intersected_rule->flags = rule1->flags | rule2->flags; |
812 | ||
813 | /* | |
814 | * In case NL80211_RRF_AUTO_BW requested for both rules | |
815 | * set AUTO_BW in intersected rule also. Next we will | |
816 | * calculate BW correctly in handle_channel function. | |
817 | * In other case remove AUTO_BW flag while we calculate | |
818 | * maximum bandwidth correctly and auto calculation is | |
819 | * not required. | |
820 | */ | |
821 | if ((rule1->flags & NL80211_RRF_AUTO_BW) && | |
822 | (rule2->flags & NL80211_RRF_AUTO_BW)) | |
823 | intersected_rule->flags |= NL80211_RRF_AUTO_BW; | |
824 | else | |
825 | intersected_rule->flags &= ~NL80211_RRF_AUTO_BW; | |
826 | ||
9c96477d LR |
827 | freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz; |
828 | if (freq_range->max_bandwidth_khz > freq_diff) | |
829 | freq_range->max_bandwidth_khz = freq_diff; | |
830 | ||
831 | power_rule->max_eirp = min(power_rule1->max_eirp, | |
832 | power_rule2->max_eirp); | |
833 | power_rule->max_antenna_gain = min(power_rule1->max_antenna_gain, | |
834 | power_rule2->max_antenna_gain); | |
835 | ||
089027e5 JD |
836 | intersected_rule->dfs_cac_ms = max(rule1->dfs_cac_ms, |
837 | rule2->dfs_cac_ms); | |
838 | ||
9c96477d LR |
839 | if (!is_valid_reg_rule(intersected_rule)) |
840 | return -EINVAL; | |
841 | ||
842 | return 0; | |
843 | } | |
844 | ||
a62a1aed EP |
845 | /* check whether old rule contains new rule */ |
846 | static bool rule_contains(struct ieee80211_reg_rule *r1, | |
847 | struct ieee80211_reg_rule *r2) | |
848 | { | |
849 | /* for simplicity, currently consider only same flags */ | |
850 | if (r1->flags != r2->flags) | |
851 | return false; | |
852 | ||
853 | /* verify r1 is more restrictive */ | |
854 | if ((r1->power_rule.max_antenna_gain > | |
855 | r2->power_rule.max_antenna_gain) || | |
856 | r1->power_rule.max_eirp > r2->power_rule.max_eirp) | |
857 | return false; | |
858 | ||
859 | /* make sure r2's range is contained within r1 */ | |
860 | if (r1->freq_range.start_freq_khz > r2->freq_range.start_freq_khz || | |
861 | r1->freq_range.end_freq_khz < r2->freq_range.end_freq_khz) | |
862 | return false; | |
863 | ||
864 | /* and finally verify that r1.max_bw >= r2.max_bw */ | |
865 | if (r1->freq_range.max_bandwidth_khz < | |
866 | r2->freq_range.max_bandwidth_khz) | |
867 | return false; | |
868 | ||
869 | return true; | |
870 | } | |
871 | ||
872 | /* add or extend current rules. do nothing if rule is already contained */ | |
873 | static void add_rule(struct ieee80211_reg_rule *rule, | |
874 | struct ieee80211_reg_rule *reg_rules, u32 *n_rules) | |
875 | { | |
876 | struct ieee80211_reg_rule *tmp_rule; | |
877 | int i; | |
878 | ||
879 | for (i = 0; i < *n_rules; i++) { | |
880 | tmp_rule = ®_rules[i]; | |
881 | /* rule is already contained - do nothing */ | |
882 | if (rule_contains(tmp_rule, rule)) | |
883 | return; | |
884 | ||
885 | /* extend rule if possible */ | |
886 | if (rule_contains(rule, tmp_rule)) { | |
887 | memcpy(tmp_rule, rule, sizeof(*rule)); | |
888 | return; | |
889 | } | |
890 | } | |
891 | ||
892 | memcpy(®_rules[*n_rules], rule, sizeof(*rule)); | |
893 | (*n_rules)++; | |
894 | } | |
895 | ||
9c96477d LR |
896 | /** |
897 | * regdom_intersect - do the intersection between two regulatory domains | |
898 | * @rd1: first regulatory domain | |
899 | * @rd2: second regulatory domain | |
900 | * | |
901 | * Use this function to get the intersection between two regulatory domains. | |
902 | * Once completed we will mark the alpha2 for the rd as intersected, "98", | |
903 | * as no one single alpha2 can represent this regulatory domain. | |
904 | * | |
905 | * Returns a pointer to the regulatory domain structure which will hold the | |
906 | * resulting intersection of rules between rd1 and rd2. We will | |
907 | * kzalloc() this structure for you. | |
908 | */ | |
1a919318 JB |
909 | static struct ieee80211_regdomain * |
910 | regdom_intersect(const struct ieee80211_regdomain *rd1, | |
911 | const struct ieee80211_regdomain *rd2) | |
9c96477d LR |
912 | { |
913 | int r, size_of_regd; | |
914 | unsigned int x, y; | |
a62a1aed | 915 | unsigned int num_rules = 0; |
9c96477d | 916 | const struct ieee80211_reg_rule *rule1, *rule2; |
a62a1aed | 917 | struct ieee80211_reg_rule intersected_rule; |
9c96477d | 918 | struct ieee80211_regdomain *rd; |
9c96477d LR |
919 | |
920 | if (!rd1 || !rd2) | |
921 | return NULL; | |
922 | ||
fb1fc7ad LR |
923 | /* |
924 | * First we get a count of the rules we'll need, then we actually | |
9c96477d LR |
925 | * build them. This is to so we can malloc() and free() a |
926 | * regdomain once. The reason we use reg_rules_intersect() here | |
927 | * is it will return -EINVAL if the rule computed makes no sense. | |
fb1fc7ad LR |
928 | * All rules that do check out OK are valid. |
929 | */ | |
9c96477d LR |
930 | |
931 | for (x = 0; x < rd1->n_reg_rules; x++) { | |
932 | rule1 = &rd1->reg_rules[x]; | |
933 | for (y = 0; y < rd2->n_reg_rules; y++) { | |
934 | rule2 = &rd2->reg_rules[y]; | |
97524820 | 935 | if (!reg_rules_intersect(rd1, rd2, rule1, rule2, |
a62a1aed | 936 | &intersected_rule)) |
9c96477d | 937 | num_rules++; |
9c96477d LR |
938 | } |
939 | } | |
940 | ||
941 | if (!num_rules) | |
942 | return NULL; | |
943 | ||
944 | size_of_regd = sizeof(struct ieee80211_regdomain) + | |
82f20856 | 945 | num_rules * sizeof(struct ieee80211_reg_rule); |
9c96477d LR |
946 | |
947 | rd = kzalloc(size_of_regd, GFP_KERNEL); | |
948 | if (!rd) | |
949 | return NULL; | |
950 | ||
a62a1aed | 951 | for (x = 0; x < rd1->n_reg_rules; x++) { |
9c96477d | 952 | rule1 = &rd1->reg_rules[x]; |
a62a1aed | 953 | for (y = 0; y < rd2->n_reg_rules; y++) { |
9c96477d | 954 | rule2 = &rd2->reg_rules[y]; |
97524820 | 955 | r = reg_rules_intersect(rd1, rd2, rule1, rule2, |
a62a1aed | 956 | &intersected_rule); |
fb1fc7ad LR |
957 | /* |
958 | * No need to memset here the intersected rule here as | |
959 | * we're not using the stack anymore | |
960 | */ | |
9c96477d LR |
961 | if (r) |
962 | continue; | |
9c96477d | 963 | |
a62a1aed EP |
964 | add_rule(&intersected_rule, rd->reg_rules, |
965 | &rd->n_reg_rules); | |
966 | } | |
9c96477d LR |
967 | } |
968 | ||
9c96477d LR |
969 | rd->alpha2[0] = '9'; |
970 | rd->alpha2[1] = '8'; | |
adbfb058 LR |
971 | rd->dfs_region = reg_intersect_dfs_region(rd1->dfs_region, |
972 | rd2->dfs_region); | |
9c96477d LR |
973 | |
974 | return rd; | |
975 | } | |
976 | ||
fb1fc7ad LR |
977 | /* |
978 | * XXX: add support for the rest of enum nl80211_reg_rule_flags, we may | |
979 | * want to just have the channel structure use these | |
980 | */ | |
b2e1b302 LR |
981 | static u32 map_regdom_flags(u32 rd_flags) |
982 | { | |
983 | u32 channel_flags = 0; | |
8fe02e16 LR |
984 | if (rd_flags & NL80211_RRF_NO_IR_ALL) |
985 | channel_flags |= IEEE80211_CHAN_NO_IR; | |
b2e1b302 LR |
986 | if (rd_flags & NL80211_RRF_DFS) |
987 | channel_flags |= IEEE80211_CHAN_RADAR; | |
03f6b084 SF |
988 | if (rd_flags & NL80211_RRF_NO_OFDM) |
989 | channel_flags |= IEEE80211_CHAN_NO_OFDM; | |
570dbde1 DS |
990 | if (rd_flags & NL80211_RRF_NO_OUTDOOR) |
991 | channel_flags |= IEEE80211_CHAN_INDOOR_ONLY; | |
06f207fc AN |
992 | if (rd_flags & NL80211_RRF_IR_CONCURRENT) |
993 | channel_flags |= IEEE80211_CHAN_IR_CONCURRENT; | |
a6d4a534 AN |
994 | if (rd_flags & NL80211_RRF_NO_HT40MINUS) |
995 | channel_flags |= IEEE80211_CHAN_NO_HT40MINUS; | |
996 | if (rd_flags & NL80211_RRF_NO_HT40PLUS) | |
997 | channel_flags |= IEEE80211_CHAN_NO_HT40PLUS; | |
998 | if (rd_flags & NL80211_RRF_NO_80MHZ) | |
999 | channel_flags |= IEEE80211_CHAN_NO_80MHZ; | |
1000 | if (rd_flags & NL80211_RRF_NO_160MHZ) | |
1001 | channel_flags |= IEEE80211_CHAN_NO_160MHZ; | |
b2e1b302 LR |
1002 | return channel_flags; |
1003 | } | |
1004 | ||
361c9c8b JB |
1005 | static const struct ieee80211_reg_rule * |
1006 | freq_reg_info_regd(struct wiphy *wiphy, u32 center_freq, | |
1007 | const struct ieee80211_regdomain *regd) | |
8318d78a JB |
1008 | { |
1009 | int i; | |
0c7dc45d | 1010 | bool band_rule_found = false; |
038659e7 LR |
1011 | bool bw_fits = false; |
1012 | ||
3e0c3ff3 | 1013 | if (!regd) |
361c9c8b | 1014 | return ERR_PTR(-EINVAL); |
b2e1b302 | 1015 | |
3e0c3ff3 | 1016 | for (i = 0; i < regd->n_reg_rules; i++) { |
b2e1b302 LR |
1017 | const struct ieee80211_reg_rule *rr; |
1018 | const struct ieee80211_freq_range *fr = NULL; | |
b2e1b302 | 1019 | |
3e0c3ff3 | 1020 | rr = ®d->reg_rules[i]; |
b2e1b302 | 1021 | fr = &rr->freq_range; |
0c7dc45d | 1022 | |
fb1fc7ad LR |
1023 | /* |
1024 | * We only need to know if one frequency rule was | |
0c7dc45d | 1025 | * was in center_freq's band, that's enough, so lets |
fb1fc7ad LR |
1026 | * not overwrite it once found |
1027 | */ | |
0c7dc45d LR |
1028 | if (!band_rule_found) |
1029 | band_rule_found = freq_in_rule_band(fr, center_freq); | |
1030 | ||
e33e2241 | 1031 | bw_fits = reg_does_bw_fit(fr, center_freq, MHZ_TO_KHZ(20)); |
0c7dc45d | 1032 | |
361c9c8b JB |
1033 | if (band_rule_found && bw_fits) |
1034 | return rr; | |
8318d78a JB |
1035 | } |
1036 | ||
0c7dc45d | 1037 | if (!band_rule_found) |
361c9c8b | 1038 | return ERR_PTR(-ERANGE); |
0c7dc45d | 1039 | |
361c9c8b | 1040 | return ERR_PTR(-EINVAL); |
b2e1b302 LR |
1041 | } |
1042 | ||
361c9c8b JB |
1043 | const struct ieee80211_reg_rule *freq_reg_info(struct wiphy *wiphy, |
1044 | u32 center_freq) | |
1fa25e41 | 1045 | { |
5d885b99 | 1046 | const struct ieee80211_regdomain *regd; |
1a919318 | 1047 | |
e3961af1 | 1048 | regd = reg_get_regdomain(wiphy); |
5d885b99 | 1049 | |
361c9c8b | 1050 | return freq_reg_info_regd(wiphy, center_freq, regd); |
1fa25e41 | 1051 | } |
4f366c5d | 1052 | EXPORT_SYMBOL(freq_reg_info); |
b2e1b302 | 1053 | |
034c6d6e | 1054 | const char *reg_initiator_name(enum nl80211_reg_initiator initiator) |
926a0a09 LR |
1055 | { |
1056 | switch (initiator) { | |
1057 | case NL80211_REGDOM_SET_BY_CORE: | |
034c6d6e | 1058 | return "core"; |
926a0a09 | 1059 | case NL80211_REGDOM_SET_BY_USER: |
034c6d6e | 1060 | return "user"; |
926a0a09 | 1061 | case NL80211_REGDOM_SET_BY_DRIVER: |
034c6d6e | 1062 | return "driver"; |
926a0a09 | 1063 | case NL80211_REGDOM_SET_BY_COUNTRY_IE: |
034c6d6e | 1064 | return "country IE"; |
926a0a09 LR |
1065 | default: |
1066 | WARN_ON(1); | |
034c6d6e | 1067 | return "bug"; |
926a0a09 LR |
1068 | } |
1069 | } | |
034c6d6e | 1070 | EXPORT_SYMBOL(reg_initiator_name); |
e702d3cf | 1071 | |
034c6d6e | 1072 | #ifdef CONFIG_CFG80211_REG_DEBUG |
b0dfd2ea JD |
1073 | static void chan_reg_rule_print_dbg(const struct ieee80211_regdomain *regd, |
1074 | struct ieee80211_channel *chan, | |
e702d3cf LR |
1075 | const struct ieee80211_reg_rule *reg_rule) |
1076 | { | |
1077 | const struct ieee80211_power_rule *power_rule; | |
1078 | const struct ieee80211_freq_range *freq_range; | |
b0dfd2ea | 1079 | char max_antenna_gain[32], bw[32]; |
e702d3cf LR |
1080 | |
1081 | power_rule = ®_rule->power_rule; | |
1082 | freq_range = ®_rule->freq_range; | |
1083 | ||
1084 | if (!power_rule->max_antenna_gain) | |
b0dfd2ea | 1085 | snprintf(max_antenna_gain, sizeof(max_antenna_gain), "N/A"); |
e702d3cf | 1086 | else |
b0dfd2ea JD |
1087 | snprintf(max_antenna_gain, sizeof(max_antenna_gain), "%d", |
1088 | power_rule->max_antenna_gain); | |
1089 | ||
1090 | if (reg_rule->flags & NL80211_RRF_AUTO_BW) | |
1091 | snprintf(bw, sizeof(bw), "%d KHz, %d KHz AUTO", | |
1092 | freq_range->max_bandwidth_khz, | |
1093 | reg_get_max_bandwidth(regd, reg_rule)); | |
1094 | else | |
1095 | snprintf(bw, sizeof(bw), "%d KHz", | |
1096 | freq_range->max_bandwidth_khz); | |
e702d3cf | 1097 | |
fe7ef5e9 JB |
1098 | REG_DBG_PRINT("Updating information on frequency %d MHz with regulatory rule:\n", |
1099 | chan->center_freq); | |
e702d3cf | 1100 | |
b0dfd2ea | 1101 | REG_DBG_PRINT("%d KHz - %d KHz @ %s), (%s mBi, %d mBm)\n", |
1a919318 | 1102 | freq_range->start_freq_khz, freq_range->end_freq_khz, |
b0dfd2ea | 1103 | bw, max_antenna_gain, |
e702d3cf LR |
1104 | power_rule->max_eirp); |
1105 | } | |
1106 | #else | |
b0dfd2ea JD |
1107 | static void chan_reg_rule_print_dbg(const struct ieee80211_regdomain *regd, |
1108 | struct ieee80211_channel *chan, | |
e702d3cf LR |
1109 | const struct ieee80211_reg_rule *reg_rule) |
1110 | { | |
1111 | return; | |
1112 | } | |
926a0a09 LR |
1113 | #endif |
1114 | ||
e33e2241 JB |
1115 | /* |
1116 | * Note that right now we assume the desired channel bandwidth | |
1117 | * is always 20 MHz for each individual channel (HT40 uses 20 MHz | |
1118 | * per channel, the primary and the extension channel). | |
038659e7 | 1119 | */ |
7ca43d03 LR |
1120 | static void handle_channel(struct wiphy *wiphy, |
1121 | enum nl80211_reg_initiator initiator, | |
fdc9d7b2 | 1122 | struct ieee80211_channel *chan) |
b2e1b302 | 1123 | { |
038659e7 | 1124 | u32 flags, bw_flags = 0; |
b2e1b302 LR |
1125 | const struct ieee80211_reg_rule *reg_rule = NULL; |
1126 | const struct ieee80211_power_rule *power_rule = NULL; | |
038659e7 | 1127 | const struct ieee80211_freq_range *freq_range = NULL; |
fe33eb39 | 1128 | struct wiphy *request_wiphy = NULL; |
c492db37 | 1129 | struct regulatory_request *lr = get_last_request(); |
97524820 JD |
1130 | const struct ieee80211_regdomain *regd; |
1131 | u32 max_bandwidth_khz; | |
a92a3ce7 | 1132 | |
c492db37 | 1133 | request_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx); |
a92a3ce7 LR |
1134 | |
1135 | flags = chan->orig_flags; | |
b2e1b302 | 1136 | |
361c9c8b JB |
1137 | reg_rule = freq_reg_info(wiphy, MHZ_TO_KHZ(chan->center_freq)); |
1138 | if (IS_ERR(reg_rule)) { | |
ca4ffe8f LR |
1139 | /* |
1140 | * We will disable all channels that do not match our | |
25985edc | 1141 | * received regulatory rule unless the hint is coming |
ca4ffe8f LR |
1142 | * from a Country IE and the Country IE had no information |
1143 | * about a band. The IEEE 802.11 spec allows for an AP | |
1144 | * to send only a subset of the regulatory rules allowed, | |
1145 | * so an AP in the US that only supports 2.4 GHz may only send | |
1146 | * a country IE with information for the 2.4 GHz band | |
1147 | * while 5 GHz is still supported. | |
1148 | */ | |
1149 | if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE && | |
361c9c8b | 1150 | PTR_ERR(reg_rule) == -ERANGE) |
ca4ffe8f LR |
1151 | return; |
1152 | ||
cc493e4f LR |
1153 | if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER && |
1154 | request_wiphy && request_wiphy == wiphy && | |
a2f73b6c | 1155 | request_wiphy->regulatory_flags & REGULATORY_STRICT_REG) { |
cc493e4f LR |
1156 | REG_DBG_PRINT("Disabling freq %d MHz for good\n", |
1157 | chan->center_freq); | |
1158 | chan->orig_flags |= IEEE80211_CHAN_DISABLED; | |
1159 | chan->flags = chan->orig_flags; | |
1160 | } else { | |
1161 | REG_DBG_PRINT("Disabling freq %d MHz\n", | |
1162 | chan->center_freq); | |
1163 | chan->flags |= IEEE80211_CHAN_DISABLED; | |
1164 | } | |
8318d78a | 1165 | return; |
ca4ffe8f | 1166 | } |
8318d78a | 1167 | |
b0dfd2ea JD |
1168 | regd = reg_get_regdomain(wiphy); |
1169 | chan_reg_rule_print_dbg(regd, chan, reg_rule); | |
e702d3cf | 1170 | |
b2e1b302 | 1171 | power_rule = ®_rule->power_rule; |
038659e7 LR |
1172 | freq_range = ®_rule->freq_range; |
1173 | ||
97524820 JD |
1174 | max_bandwidth_khz = freq_range->max_bandwidth_khz; |
1175 | /* Check if auto calculation requested */ | |
b0dfd2ea | 1176 | if (reg_rule->flags & NL80211_RRF_AUTO_BW) |
97524820 | 1177 | max_bandwidth_khz = reg_get_max_bandwidth(regd, reg_rule); |
97524820 JD |
1178 | |
1179 | if (max_bandwidth_khz < MHZ_TO_KHZ(40)) | |
e33e2241 | 1180 | bw_flags = IEEE80211_CHAN_NO_HT40; |
97524820 | 1181 | if (max_bandwidth_khz < MHZ_TO_KHZ(80)) |
c7a6ee27 | 1182 | bw_flags |= IEEE80211_CHAN_NO_80MHZ; |
97524820 | 1183 | if (max_bandwidth_khz < MHZ_TO_KHZ(160)) |
c7a6ee27 | 1184 | bw_flags |= IEEE80211_CHAN_NO_160MHZ; |
b2e1b302 | 1185 | |
c492db37 | 1186 | if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER && |
806a9e39 | 1187 | request_wiphy && request_wiphy == wiphy && |
a2f73b6c | 1188 | request_wiphy->regulatory_flags & REGULATORY_STRICT_REG) { |
fb1fc7ad | 1189 | /* |
25985edc | 1190 | * This guarantees the driver's requested regulatory domain |
f976376d | 1191 | * will always be used as a base for further regulatory |
fb1fc7ad LR |
1192 | * settings |
1193 | */ | |
f976376d | 1194 | chan->flags = chan->orig_flags = |
038659e7 | 1195 | map_regdom_flags(reg_rule->flags) | bw_flags; |
f976376d LR |
1196 | chan->max_antenna_gain = chan->orig_mag = |
1197 | (int) MBI_TO_DBI(power_rule->max_antenna_gain); | |
279f0f55 | 1198 | chan->max_reg_power = chan->max_power = chan->orig_mpwr = |
f976376d | 1199 | (int) MBM_TO_DBM(power_rule->max_eirp); |
4f267c11 JD |
1200 | |
1201 | if (chan->flags & IEEE80211_CHAN_RADAR) { | |
1202 | chan->dfs_cac_ms = IEEE80211_DFS_MIN_CAC_TIME_MS; | |
1203 | if (reg_rule->dfs_cac_ms) | |
1204 | chan->dfs_cac_ms = reg_rule->dfs_cac_ms; | |
1205 | } | |
1206 | ||
f976376d LR |
1207 | return; |
1208 | } | |
1209 | ||
04f39047 SW |
1210 | chan->dfs_state = NL80211_DFS_USABLE; |
1211 | chan->dfs_state_entered = jiffies; | |
1212 | ||
aa3d7eef | 1213 | chan->beacon_found = false; |
038659e7 | 1214 | chan->flags = flags | bw_flags | map_regdom_flags(reg_rule->flags); |
1a919318 JB |
1215 | chan->max_antenna_gain = |
1216 | min_t(int, chan->orig_mag, | |
1217 | MBI_TO_DBI(power_rule->max_antenna_gain)); | |
eccc068e | 1218 | chan->max_reg_power = (int) MBM_TO_DBM(power_rule->max_eirp); |
089027e5 JD |
1219 | |
1220 | if (chan->flags & IEEE80211_CHAN_RADAR) { | |
1221 | if (reg_rule->dfs_cac_ms) | |
1222 | chan->dfs_cac_ms = reg_rule->dfs_cac_ms; | |
1223 | else | |
1224 | chan->dfs_cac_ms = IEEE80211_DFS_MIN_CAC_TIME_MS; | |
1225 | } | |
1226 | ||
5e31fc08 SG |
1227 | if (chan->orig_mpwr) { |
1228 | /* | |
a09a85a0 LR |
1229 | * Devices that use REGULATORY_COUNTRY_IE_FOLLOW_POWER |
1230 | * will always follow the passed country IE power settings. | |
5e31fc08 SG |
1231 | */ |
1232 | if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE && | |
a09a85a0 | 1233 | wiphy->regulatory_flags & REGULATORY_COUNTRY_IE_FOLLOW_POWER) |
5e31fc08 SG |
1234 | chan->max_power = chan->max_reg_power; |
1235 | else | |
1236 | chan->max_power = min(chan->orig_mpwr, | |
1237 | chan->max_reg_power); | |
1238 | } else | |
1239 | chan->max_power = chan->max_reg_power; | |
8318d78a JB |
1240 | } |
1241 | ||
7ca43d03 | 1242 | static void handle_band(struct wiphy *wiphy, |
fdc9d7b2 JB |
1243 | enum nl80211_reg_initiator initiator, |
1244 | struct ieee80211_supported_band *sband) | |
8318d78a | 1245 | { |
a92a3ce7 | 1246 | unsigned int i; |
a92a3ce7 | 1247 | |
fdc9d7b2 JB |
1248 | if (!sband) |
1249 | return; | |
8318d78a JB |
1250 | |
1251 | for (i = 0; i < sband->n_channels; i++) | |
fdc9d7b2 | 1252 | handle_channel(wiphy, initiator, &sband->channels[i]); |
8318d78a JB |
1253 | } |
1254 | ||
57b5ce07 LR |
1255 | static bool reg_request_cell_base(struct regulatory_request *request) |
1256 | { | |
1257 | if (request->initiator != NL80211_REGDOM_SET_BY_USER) | |
1258 | return false; | |
1a919318 | 1259 | return request->user_reg_hint_type == NL80211_USER_REG_HINT_CELL_BASE; |
57b5ce07 LR |
1260 | } |
1261 | ||
1262 | bool reg_last_request_cell_base(void) | |
1263 | { | |
38fd2143 | 1264 | return reg_request_cell_base(get_last_request()); |
57b5ce07 LR |
1265 | } |
1266 | ||
94fc661f | 1267 | #ifdef CONFIG_CFG80211_REG_CELLULAR_HINTS |
57b5ce07 | 1268 | /* Core specific check */ |
2f92212b JB |
1269 | static enum reg_request_treatment |
1270 | reg_ignore_cell_hint(struct regulatory_request *pending_request) | |
57b5ce07 | 1271 | { |
c492db37 JB |
1272 | struct regulatory_request *lr = get_last_request(); |
1273 | ||
57b5ce07 | 1274 | if (!reg_num_devs_support_basehint) |
2f92212b | 1275 | return REG_REQ_IGNORE; |
57b5ce07 | 1276 | |
c492db37 | 1277 | if (reg_request_cell_base(lr) && |
1a919318 | 1278 | !regdom_changes(pending_request->alpha2)) |
2f92212b | 1279 | return REG_REQ_ALREADY_SET; |
1a919318 | 1280 | |
2f92212b | 1281 | return REG_REQ_OK; |
57b5ce07 LR |
1282 | } |
1283 | ||
1284 | /* Device specific check */ | |
1285 | static bool reg_dev_ignore_cell_hint(struct wiphy *wiphy) | |
1286 | { | |
1a919318 | 1287 | return !(wiphy->features & NL80211_FEATURE_CELL_BASE_REG_HINTS); |
57b5ce07 LR |
1288 | } |
1289 | #else | |
1290 | static int reg_ignore_cell_hint(struct regulatory_request *pending_request) | |
1291 | { | |
2f92212b | 1292 | return REG_REQ_IGNORE; |
57b5ce07 | 1293 | } |
1a919318 JB |
1294 | |
1295 | static bool reg_dev_ignore_cell_hint(struct wiphy *wiphy) | |
57b5ce07 LR |
1296 | { |
1297 | return true; | |
1298 | } | |
1299 | #endif | |
1300 | ||
fa1fb9cb LR |
1301 | static bool wiphy_strict_alpha2_regd(struct wiphy *wiphy) |
1302 | { | |
a2f73b6c LR |
1303 | if (wiphy->regulatory_flags & REGULATORY_STRICT_REG && |
1304 | !(wiphy->regulatory_flags & REGULATORY_CUSTOM_REG)) | |
fa1fb9cb LR |
1305 | return true; |
1306 | return false; | |
1307 | } | |
57b5ce07 | 1308 | |
7db90f4a LR |
1309 | static bool ignore_reg_update(struct wiphy *wiphy, |
1310 | enum nl80211_reg_initiator initiator) | |
14b9815a | 1311 | { |
c492db37 JB |
1312 | struct regulatory_request *lr = get_last_request(); |
1313 | ||
b0d7aa59 JD |
1314 | if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) |
1315 | return true; | |
1316 | ||
c492db37 | 1317 | if (!lr) { |
034c6d6e LR |
1318 | REG_DBG_PRINT("Ignoring regulatory request set by %s " |
1319 | "since last_request is not set\n", | |
926a0a09 | 1320 | reg_initiator_name(initiator)); |
14b9815a | 1321 | return true; |
926a0a09 LR |
1322 | } |
1323 | ||
7db90f4a | 1324 | if (initiator == NL80211_REGDOM_SET_BY_CORE && |
a2f73b6c | 1325 | wiphy->regulatory_flags & REGULATORY_CUSTOM_REG) { |
034c6d6e LR |
1326 | REG_DBG_PRINT("Ignoring regulatory request set by %s " |
1327 | "since the driver uses its own custom " | |
1328 | "regulatory domain\n", | |
926a0a09 | 1329 | reg_initiator_name(initiator)); |
14b9815a | 1330 | return true; |
926a0a09 LR |
1331 | } |
1332 | ||
fb1fc7ad LR |
1333 | /* |
1334 | * wiphy->regd will be set once the device has its own | |
1335 | * desired regulatory domain set | |
1336 | */ | |
fa1fb9cb | 1337 | if (wiphy_strict_alpha2_regd(wiphy) && !wiphy->regd && |
749b527b | 1338 | initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && |
c492db37 | 1339 | !is_world_regdom(lr->alpha2)) { |
034c6d6e LR |
1340 | REG_DBG_PRINT("Ignoring regulatory request set by %s " |
1341 | "since the driver requires its own regulatory " | |
1342 | "domain to be set first\n", | |
926a0a09 | 1343 | reg_initiator_name(initiator)); |
14b9815a | 1344 | return true; |
926a0a09 LR |
1345 | } |
1346 | ||
c492db37 | 1347 | if (reg_request_cell_base(lr)) |
57b5ce07 LR |
1348 | return reg_dev_ignore_cell_hint(wiphy); |
1349 | ||
14b9815a LR |
1350 | return false; |
1351 | } | |
1352 | ||
3195e489 LR |
1353 | static bool reg_is_world_roaming(struct wiphy *wiphy) |
1354 | { | |
1355 | const struct ieee80211_regdomain *cr = get_cfg80211_regdom(); | |
1356 | const struct ieee80211_regdomain *wr = get_wiphy_regdom(wiphy); | |
1357 | struct regulatory_request *lr = get_last_request(); | |
1358 | ||
1359 | if (is_world_regdom(cr->alpha2) || (wr && is_world_regdom(wr->alpha2))) | |
1360 | return true; | |
1361 | ||
1362 | if (lr && lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && | |
a2f73b6c | 1363 | wiphy->regulatory_flags & REGULATORY_CUSTOM_REG) |
3195e489 LR |
1364 | return true; |
1365 | ||
1366 | return false; | |
1367 | } | |
1368 | ||
1a919318 | 1369 | static void handle_reg_beacon(struct wiphy *wiphy, unsigned int chan_idx, |
e38f8a7a LR |
1370 | struct reg_beacon *reg_beacon) |
1371 | { | |
e38f8a7a LR |
1372 | struct ieee80211_supported_band *sband; |
1373 | struct ieee80211_channel *chan; | |
6bad8766 LR |
1374 | bool channel_changed = false; |
1375 | struct ieee80211_channel chan_before; | |
e38f8a7a | 1376 | |
e38f8a7a LR |
1377 | sband = wiphy->bands[reg_beacon->chan.band]; |
1378 | chan = &sband->channels[chan_idx]; | |
1379 | ||
1380 | if (likely(chan->center_freq != reg_beacon->chan.center_freq)) | |
1381 | return; | |
1382 | ||
6bad8766 LR |
1383 | if (chan->beacon_found) |
1384 | return; | |
1385 | ||
1386 | chan->beacon_found = true; | |
1387 | ||
0f500a5f LR |
1388 | if (!reg_is_world_roaming(wiphy)) |
1389 | return; | |
1390 | ||
a2f73b6c | 1391 | if (wiphy->regulatory_flags & REGULATORY_DISABLE_BEACON_HINTS) |
37184244 LR |
1392 | return; |
1393 | ||
6bad8766 LR |
1394 | chan_before.center_freq = chan->center_freq; |
1395 | chan_before.flags = chan->flags; | |
1396 | ||
8fe02e16 LR |
1397 | if (chan->flags & IEEE80211_CHAN_NO_IR) { |
1398 | chan->flags &= ~IEEE80211_CHAN_NO_IR; | |
6bad8766 | 1399 | channel_changed = true; |
e38f8a7a LR |
1400 | } |
1401 | ||
6bad8766 LR |
1402 | if (channel_changed) |
1403 | nl80211_send_beacon_hint_event(wiphy, &chan_before, chan); | |
e38f8a7a LR |
1404 | } |
1405 | ||
1406 | /* | |
1407 | * Called when a scan on a wiphy finds a beacon on | |
1408 | * new channel | |
1409 | */ | |
1410 | static void wiphy_update_new_beacon(struct wiphy *wiphy, | |
1411 | struct reg_beacon *reg_beacon) | |
1412 | { | |
1413 | unsigned int i; | |
1414 | struct ieee80211_supported_band *sband; | |
1415 | ||
e38f8a7a LR |
1416 | if (!wiphy->bands[reg_beacon->chan.band]) |
1417 | return; | |
1418 | ||
1419 | sband = wiphy->bands[reg_beacon->chan.band]; | |
1420 | ||
1421 | for (i = 0; i < sband->n_channels; i++) | |
1422 | handle_reg_beacon(wiphy, i, reg_beacon); | |
1423 | } | |
1424 | ||
1425 | /* | |
1426 | * Called upon reg changes or a new wiphy is added | |
1427 | */ | |
1428 | static void wiphy_update_beacon_reg(struct wiphy *wiphy) | |
1429 | { | |
1430 | unsigned int i; | |
1431 | struct ieee80211_supported_band *sband; | |
1432 | struct reg_beacon *reg_beacon; | |
1433 | ||
e38f8a7a LR |
1434 | list_for_each_entry(reg_beacon, ®_beacon_list, list) { |
1435 | if (!wiphy->bands[reg_beacon->chan.band]) | |
1436 | continue; | |
1437 | sband = wiphy->bands[reg_beacon->chan.band]; | |
1438 | for (i = 0; i < sband->n_channels; i++) | |
1439 | handle_reg_beacon(wiphy, i, reg_beacon); | |
1440 | } | |
1441 | } | |
1442 | ||
e38f8a7a LR |
1443 | /* Reap the advantages of previously found beacons */ |
1444 | static void reg_process_beacons(struct wiphy *wiphy) | |
1445 | { | |
b1ed8ddd LR |
1446 | /* |
1447 | * Means we are just firing up cfg80211, so no beacons would | |
1448 | * have been processed yet. | |
1449 | */ | |
1450 | if (!last_request) | |
1451 | return; | |
e38f8a7a LR |
1452 | wiphy_update_beacon_reg(wiphy); |
1453 | } | |
1454 | ||
1a919318 | 1455 | static bool is_ht40_allowed(struct ieee80211_channel *chan) |
038659e7 LR |
1456 | { |
1457 | if (!chan) | |
1a919318 | 1458 | return false; |
038659e7 | 1459 | if (chan->flags & IEEE80211_CHAN_DISABLED) |
1a919318 | 1460 | return false; |
038659e7 | 1461 | /* This would happen when regulatory rules disallow HT40 completely */ |
55b183ad FF |
1462 | if ((chan->flags & IEEE80211_CHAN_NO_HT40) == IEEE80211_CHAN_NO_HT40) |
1463 | return false; | |
1464 | return true; | |
038659e7 LR |
1465 | } |
1466 | ||
1467 | static void reg_process_ht_flags_channel(struct wiphy *wiphy, | |
fdc9d7b2 | 1468 | struct ieee80211_channel *channel) |
038659e7 | 1469 | { |
fdc9d7b2 | 1470 | struct ieee80211_supported_band *sband = wiphy->bands[channel->band]; |
038659e7 LR |
1471 | struct ieee80211_channel *channel_before = NULL, *channel_after = NULL; |
1472 | unsigned int i; | |
1473 | ||
1a919318 | 1474 | if (!is_ht40_allowed(channel)) { |
038659e7 LR |
1475 | channel->flags |= IEEE80211_CHAN_NO_HT40; |
1476 | return; | |
1477 | } | |
1478 | ||
1479 | /* | |
1480 | * We need to ensure the extension channels exist to | |
1481 | * be able to use HT40- or HT40+, this finds them (or not) | |
1482 | */ | |
1483 | for (i = 0; i < sband->n_channels; i++) { | |
1484 | struct ieee80211_channel *c = &sband->channels[i]; | |
1a919318 | 1485 | |
038659e7 LR |
1486 | if (c->center_freq == (channel->center_freq - 20)) |
1487 | channel_before = c; | |
1488 | if (c->center_freq == (channel->center_freq + 20)) | |
1489 | channel_after = c; | |
1490 | } | |
1491 | ||
1492 | /* | |
1493 | * Please note that this assumes target bandwidth is 20 MHz, | |
1494 | * if that ever changes we also need to change the below logic | |
1495 | * to include that as well. | |
1496 | */ | |
1a919318 | 1497 | if (!is_ht40_allowed(channel_before)) |
689da1b3 | 1498 | channel->flags |= IEEE80211_CHAN_NO_HT40MINUS; |
038659e7 | 1499 | else |
689da1b3 | 1500 | channel->flags &= ~IEEE80211_CHAN_NO_HT40MINUS; |
038659e7 | 1501 | |
1a919318 | 1502 | if (!is_ht40_allowed(channel_after)) |
689da1b3 | 1503 | channel->flags |= IEEE80211_CHAN_NO_HT40PLUS; |
038659e7 | 1504 | else |
689da1b3 | 1505 | channel->flags &= ~IEEE80211_CHAN_NO_HT40PLUS; |
038659e7 LR |
1506 | } |
1507 | ||
1508 | static void reg_process_ht_flags_band(struct wiphy *wiphy, | |
fdc9d7b2 | 1509 | struct ieee80211_supported_band *sband) |
038659e7 LR |
1510 | { |
1511 | unsigned int i; | |
038659e7 | 1512 | |
fdc9d7b2 JB |
1513 | if (!sband) |
1514 | return; | |
038659e7 LR |
1515 | |
1516 | for (i = 0; i < sband->n_channels; i++) | |
fdc9d7b2 | 1517 | reg_process_ht_flags_channel(wiphy, &sband->channels[i]); |
038659e7 LR |
1518 | } |
1519 | ||
1520 | static void reg_process_ht_flags(struct wiphy *wiphy) | |
1521 | { | |
1522 | enum ieee80211_band band; | |
1523 | ||
1524 | if (!wiphy) | |
1525 | return; | |
1526 | ||
fdc9d7b2 JB |
1527 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) |
1528 | reg_process_ht_flags_band(wiphy, wiphy->bands[band]); | |
038659e7 LR |
1529 | } |
1530 | ||
0e3802db LR |
1531 | static void reg_call_notifier(struct wiphy *wiphy, |
1532 | struct regulatory_request *request) | |
1533 | { | |
1534 | if (wiphy->reg_notifier) | |
1535 | wiphy->reg_notifier(wiphy, request); | |
1536 | } | |
1537 | ||
ad932f04 AN |
1538 | static bool reg_wdev_chan_valid(struct wiphy *wiphy, struct wireless_dev *wdev) |
1539 | { | |
ad932f04 AN |
1540 | struct cfg80211_chan_def chandef; |
1541 | struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); | |
20658702 | 1542 | enum nl80211_iftype iftype; |
ad932f04 AN |
1543 | |
1544 | wdev_lock(wdev); | |
20658702 | 1545 | iftype = wdev->iftype; |
ad932f04 | 1546 | |
20658702 | 1547 | /* make sure the interface is active */ |
ad932f04 | 1548 | if (!wdev->netdev || !netif_running(wdev->netdev)) |
20658702 | 1549 | goto wdev_inactive_unlock; |
ad932f04 | 1550 | |
20658702 | 1551 | switch (iftype) { |
ad932f04 AN |
1552 | case NL80211_IFTYPE_AP: |
1553 | case NL80211_IFTYPE_P2P_GO: | |
1554 | if (!wdev->beacon_interval) | |
20658702 AN |
1555 | goto wdev_inactive_unlock; |
1556 | chandef = wdev->chandef; | |
185076d6 AN |
1557 | break; |
1558 | case NL80211_IFTYPE_ADHOC: | |
1559 | if (!wdev->ssid_len) | |
20658702 AN |
1560 | goto wdev_inactive_unlock; |
1561 | chandef = wdev->chandef; | |
ad932f04 AN |
1562 | break; |
1563 | case NL80211_IFTYPE_STATION: | |
1564 | case NL80211_IFTYPE_P2P_CLIENT: | |
ad932f04 AN |
1565 | if (!wdev->current_bss || |
1566 | !wdev->current_bss->pub.channel) | |
20658702 | 1567 | goto wdev_inactive_unlock; |
ad932f04 | 1568 | |
20658702 AN |
1569 | if (!rdev->ops->get_channel || |
1570 | rdev_get_channel(rdev, wdev, &chandef)) | |
1571 | cfg80211_chandef_create(&chandef, | |
1572 | wdev->current_bss->pub.channel, | |
1573 | NL80211_CHAN_NO_HT); | |
ad932f04 AN |
1574 | break; |
1575 | case NL80211_IFTYPE_MONITOR: | |
1576 | case NL80211_IFTYPE_AP_VLAN: | |
1577 | case NL80211_IFTYPE_P2P_DEVICE: | |
1578 | /* no enforcement required */ | |
1579 | break; | |
1580 | default: | |
1581 | /* others not implemented for now */ | |
1582 | WARN_ON(1); | |
1583 | break; | |
1584 | } | |
1585 | ||
ad932f04 | 1586 | wdev_unlock(wdev); |
20658702 AN |
1587 | |
1588 | switch (iftype) { | |
1589 | case NL80211_IFTYPE_AP: | |
1590 | case NL80211_IFTYPE_P2P_GO: | |
1591 | case NL80211_IFTYPE_ADHOC: | |
923b352f | 1592 | return cfg80211_reg_can_beacon_relax(wiphy, &chandef, iftype); |
20658702 AN |
1593 | case NL80211_IFTYPE_STATION: |
1594 | case NL80211_IFTYPE_P2P_CLIENT: | |
1595 | return cfg80211_chandef_usable(wiphy, &chandef, | |
1596 | IEEE80211_CHAN_DISABLED); | |
1597 | default: | |
1598 | break; | |
1599 | } | |
1600 | ||
1601 | return true; | |
1602 | ||
1603 | wdev_inactive_unlock: | |
1604 | wdev_unlock(wdev); | |
1605 | return true; | |
ad932f04 AN |
1606 | } |
1607 | ||
1608 | static void reg_leave_invalid_chans(struct wiphy *wiphy) | |
1609 | { | |
1610 | struct wireless_dev *wdev; | |
1611 | struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); | |
1612 | ||
1613 | ASSERT_RTNL(); | |
1614 | ||
1615 | list_for_each_entry(wdev, &rdev->wdev_list, list) | |
1616 | if (!reg_wdev_chan_valid(wiphy, wdev)) | |
1617 | cfg80211_leave(rdev, wdev); | |
1618 | } | |
1619 | ||
1620 | static void reg_check_chans_work(struct work_struct *work) | |
1621 | { | |
1622 | struct cfg80211_registered_device *rdev; | |
1623 | ||
1624 | REG_DBG_PRINT("Verifying active interfaces after reg change\n"); | |
1625 | rtnl_lock(); | |
1626 | ||
1627 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) | |
1628 | if (!(rdev->wiphy.regulatory_flags & | |
1629 | REGULATORY_IGNORE_STALE_KICKOFF)) | |
1630 | reg_leave_invalid_chans(&rdev->wiphy); | |
1631 | ||
1632 | rtnl_unlock(); | |
1633 | } | |
1634 | ||
1635 | static void reg_check_channels(void) | |
1636 | { | |
1637 | /* | |
1638 | * Give usermode a chance to do something nicer (move to another | |
1639 | * channel, orderly disconnection), before forcing a disconnection. | |
1640 | */ | |
1641 | mod_delayed_work(system_power_efficient_wq, | |
1642 | ®_check_chans, | |
1643 | msecs_to_jiffies(REG_ENFORCE_GRACE_MS)); | |
1644 | } | |
1645 | ||
eac03e38 SN |
1646 | static void wiphy_update_regulatory(struct wiphy *wiphy, |
1647 | enum nl80211_reg_initiator initiator) | |
b2e1b302 LR |
1648 | { |
1649 | enum ieee80211_band band; | |
c492db37 | 1650 | struct regulatory_request *lr = get_last_request(); |
eac03e38 | 1651 | |
0e3802db LR |
1652 | if (ignore_reg_update(wiphy, initiator)) { |
1653 | /* | |
1654 | * Regulatory updates set by CORE are ignored for custom | |
1655 | * regulatory cards. Let us notify the changes to the driver, | |
1656 | * as some drivers used this to restore its orig_* reg domain. | |
1657 | */ | |
1658 | if (initiator == NL80211_REGDOM_SET_BY_CORE && | |
a2f73b6c | 1659 | wiphy->regulatory_flags & REGULATORY_CUSTOM_REG) |
0e3802db | 1660 | reg_call_notifier(wiphy, lr); |
a203c2aa | 1661 | return; |
0e3802db | 1662 | } |
a203c2aa | 1663 | |
c492db37 | 1664 | lr->dfs_region = get_cfg80211_regdom()->dfs_region; |
b68e6b3b | 1665 | |
fdc9d7b2 JB |
1666 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) |
1667 | handle_band(wiphy, initiator, wiphy->bands[band]); | |
a203c2aa | 1668 | |
e38f8a7a | 1669 | reg_process_beacons(wiphy); |
038659e7 | 1670 | reg_process_ht_flags(wiphy); |
0e3802db | 1671 | reg_call_notifier(wiphy, lr); |
b2e1b302 LR |
1672 | } |
1673 | ||
d7549cbb SN |
1674 | static void update_all_wiphy_regulatory(enum nl80211_reg_initiator initiator) |
1675 | { | |
1676 | struct cfg80211_registered_device *rdev; | |
4a38994f | 1677 | struct wiphy *wiphy; |
d7549cbb | 1678 | |
5fe231e8 | 1679 | ASSERT_RTNL(); |
458f4f9e | 1680 | |
4a38994f RM |
1681 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) { |
1682 | wiphy = &rdev->wiphy; | |
1683 | wiphy_update_regulatory(wiphy, initiator); | |
4a38994f | 1684 | } |
ad932f04 AN |
1685 | |
1686 | reg_check_channels(); | |
d7549cbb SN |
1687 | } |
1688 | ||
1fa25e41 | 1689 | static void handle_channel_custom(struct wiphy *wiphy, |
fdc9d7b2 | 1690 | struct ieee80211_channel *chan, |
1fa25e41 LR |
1691 | const struct ieee80211_regdomain *regd) |
1692 | { | |
038659e7 | 1693 | u32 bw_flags = 0; |
1fa25e41 LR |
1694 | const struct ieee80211_reg_rule *reg_rule = NULL; |
1695 | const struct ieee80211_power_rule *power_rule = NULL; | |
038659e7 | 1696 | const struct ieee80211_freq_range *freq_range = NULL; |
97524820 | 1697 | u32 max_bandwidth_khz; |
ac46d48e | 1698 | |
361c9c8b JB |
1699 | reg_rule = freq_reg_info_regd(wiphy, MHZ_TO_KHZ(chan->center_freq), |
1700 | regd); | |
1fa25e41 | 1701 | |
361c9c8b | 1702 | if (IS_ERR(reg_rule)) { |
fe7ef5e9 JB |
1703 | REG_DBG_PRINT("Disabling freq %d MHz as custom regd has no rule that fits it\n", |
1704 | chan->center_freq); | |
db8dfee5 AN |
1705 | if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) { |
1706 | chan->flags |= IEEE80211_CHAN_DISABLED; | |
1707 | } else { | |
1708 | chan->orig_flags |= IEEE80211_CHAN_DISABLED; | |
1709 | chan->flags = chan->orig_flags; | |
1710 | } | |
1fa25e41 LR |
1711 | return; |
1712 | } | |
1713 | ||
b0dfd2ea | 1714 | chan_reg_rule_print_dbg(regd, chan, reg_rule); |
e702d3cf | 1715 | |
1fa25e41 | 1716 | power_rule = ®_rule->power_rule; |
038659e7 LR |
1717 | freq_range = ®_rule->freq_range; |
1718 | ||
97524820 JD |
1719 | max_bandwidth_khz = freq_range->max_bandwidth_khz; |
1720 | /* Check if auto calculation requested */ | |
b0dfd2ea | 1721 | if (reg_rule->flags & NL80211_RRF_AUTO_BW) |
97524820 JD |
1722 | max_bandwidth_khz = reg_get_max_bandwidth(regd, reg_rule); |
1723 | ||
1724 | if (max_bandwidth_khz < MHZ_TO_KHZ(40)) | |
e33e2241 | 1725 | bw_flags = IEEE80211_CHAN_NO_HT40; |
97524820 | 1726 | if (max_bandwidth_khz < MHZ_TO_KHZ(80)) |
c7a6ee27 | 1727 | bw_flags |= IEEE80211_CHAN_NO_80MHZ; |
97524820 | 1728 | if (max_bandwidth_khz < MHZ_TO_KHZ(160)) |
c7a6ee27 | 1729 | bw_flags |= IEEE80211_CHAN_NO_160MHZ; |
1fa25e41 | 1730 | |
2e18b38f | 1731 | chan->dfs_state_entered = jiffies; |
c7ab5081 AN |
1732 | chan->dfs_state = NL80211_DFS_USABLE; |
1733 | ||
1734 | chan->beacon_found = false; | |
db8dfee5 AN |
1735 | |
1736 | if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) | |
1737 | chan->flags = chan->orig_flags | bw_flags | | |
1738 | map_regdom_flags(reg_rule->flags); | |
1739 | else | |
1740 | chan->flags |= map_regdom_flags(reg_rule->flags) | bw_flags; | |
1741 | ||
1fa25e41 | 1742 | chan->max_antenna_gain = (int) MBI_TO_DBI(power_rule->max_antenna_gain); |
279f0f55 FF |
1743 | chan->max_reg_power = chan->max_power = |
1744 | (int) MBM_TO_DBM(power_rule->max_eirp); | |
2e18b38f AN |
1745 | |
1746 | if (chan->flags & IEEE80211_CHAN_RADAR) { | |
1747 | if (reg_rule->dfs_cac_ms) | |
1748 | chan->dfs_cac_ms = reg_rule->dfs_cac_ms; | |
1749 | else | |
1750 | chan->dfs_cac_ms = IEEE80211_DFS_MIN_CAC_TIME_MS; | |
1751 | } | |
1752 | ||
1753 | chan->max_power = chan->max_reg_power; | |
1fa25e41 LR |
1754 | } |
1755 | ||
fdc9d7b2 JB |
1756 | static void handle_band_custom(struct wiphy *wiphy, |
1757 | struct ieee80211_supported_band *sband, | |
1fa25e41 LR |
1758 | const struct ieee80211_regdomain *regd) |
1759 | { | |
1760 | unsigned int i; | |
1fa25e41 | 1761 | |
fdc9d7b2 JB |
1762 | if (!sband) |
1763 | return; | |
1fa25e41 LR |
1764 | |
1765 | for (i = 0; i < sband->n_channels; i++) | |
fdc9d7b2 | 1766 | handle_channel_custom(wiphy, &sband->channels[i], regd); |
1fa25e41 LR |
1767 | } |
1768 | ||
1769 | /* Used by drivers prior to wiphy registration */ | |
1770 | void wiphy_apply_custom_regulatory(struct wiphy *wiphy, | |
1771 | const struct ieee80211_regdomain *regd) | |
1772 | { | |
1773 | enum ieee80211_band band; | |
bbcf3f02 | 1774 | unsigned int bands_set = 0; |
ac46d48e | 1775 | |
a2f73b6c LR |
1776 | WARN(!(wiphy->regulatory_flags & REGULATORY_CUSTOM_REG), |
1777 | "wiphy should have REGULATORY_CUSTOM_REG\n"); | |
1778 | wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG; | |
222ea581 | 1779 | |
1fa25e41 | 1780 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) { |
bbcf3f02 LR |
1781 | if (!wiphy->bands[band]) |
1782 | continue; | |
fdc9d7b2 | 1783 | handle_band_custom(wiphy, wiphy->bands[band], regd); |
bbcf3f02 | 1784 | bands_set++; |
b2e1b302 | 1785 | } |
bbcf3f02 LR |
1786 | |
1787 | /* | |
1788 | * no point in calling this if it won't have any effect | |
1a919318 | 1789 | * on your device's supported bands. |
bbcf3f02 LR |
1790 | */ |
1791 | WARN_ON(!bands_set); | |
b2e1b302 | 1792 | } |
1fa25e41 LR |
1793 | EXPORT_SYMBOL(wiphy_apply_custom_regulatory); |
1794 | ||
b2e253cf LR |
1795 | static void reg_set_request_processed(void) |
1796 | { | |
1797 | bool need_more_processing = false; | |
c492db37 | 1798 | struct regulatory_request *lr = get_last_request(); |
b2e253cf | 1799 | |
c492db37 | 1800 | lr->processed = true; |
b2e253cf LR |
1801 | |
1802 | spin_lock(®_requests_lock); | |
1803 | if (!list_empty(®_requests_list)) | |
1804 | need_more_processing = true; | |
1805 | spin_unlock(®_requests_lock); | |
1806 | ||
eeca9fce | 1807 | cancel_delayed_work(®_timeout); |
a90c7a31 | 1808 | |
b2e253cf LR |
1809 | if (need_more_processing) |
1810 | schedule_work(®_work); | |
1811 | } | |
1812 | ||
b3eb7f3f LR |
1813 | /** |
1814 | * reg_process_hint_core - process core regulatory requests | |
1815 | * @pending_request: a pending core regulatory request | |
1816 | * | |
1817 | * The wireless subsystem can use this function to process | |
1818 | * a regulatory request issued by the regulatory core. | |
1819 | * | |
1820 | * Returns one of the different reg request treatment values. | |
1821 | */ | |
1822 | static enum reg_request_treatment | |
1823 | reg_process_hint_core(struct regulatory_request *core_request) | |
1824 | { | |
b3eb7f3f LR |
1825 | |
1826 | core_request->intersect = false; | |
1827 | core_request->processed = false; | |
5ad6ef5e | 1828 | |
05f1a3ea | 1829 | reg_update_last_request(core_request); |
b3eb7f3f | 1830 | |
fe6631ff | 1831 | return reg_call_crda(core_request); |
b3eb7f3f LR |
1832 | } |
1833 | ||
0d97a619 LR |
1834 | static enum reg_request_treatment |
1835 | __reg_process_hint_user(struct regulatory_request *user_request) | |
1836 | { | |
1837 | struct regulatory_request *lr = get_last_request(); | |
1838 | ||
1839 | if (reg_request_cell_base(user_request)) | |
1840 | return reg_ignore_cell_hint(user_request); | |
1841 | ||
1842 | if (reg_request_cell_base(lr)) | |
1843 | return REG_REQ_IGNORE; | |
1844 | ||
1845 | if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) | |
1846 | return REG_REQ_INTERSECT; | |
1847 | /* | |
1848 | * If the user knows better the user should set the regdom | |
1849 | * to their country before the IE is picked up | |
1850 | */ | |
1851 | if (lr->initiator == NL80211_REGDOM_SET_BY_USER && | |
1852 | lr->intersect) | |
1853 | return REG_REQ_IGNORE; | |
1854 | /* | |
1855 | * Process user requests only after previous user/driver/core | |
1856 | * requests have been processed | |
1857 | */ | |
1858 | if ((lr->initiator == NL80211_REGDOM_SET_BY_CORE || | |
1859 | lr->initiator == NL80211_REGDOM_SET_BY_DRIVER || | |
1860 | lr->initiator == NL80211_REGDOM_SET_BY_USER) && | |
1861 | regdom_changes(lr->alpha2)) | |
1862 | return REG_REQ_IGNORE; | |
1863 | ||
1864 | if (!regdom_changes(user_request->alpha2)) | |
1865 | return REG_REQ_ALREADY_SET; | |
1866 | ||
1867 | return REG_REQ_OK; | |
1868 | } | |
1869 | ||
1870 | /** | |
1871 | * reg_process_hint_user - process user regulatory requests | |
1872 | * @user_request: a pending user regulatory request | |
1873 | * | |
1874 | * The wireless subsystem can use this function to process | |
1875 | * a regulatory request initiated by userspace. | |
1876 | * | |
1877 | * Returns one of the different reg request treatment values. | |
1878 | */ | |
1879 | static enum reg_request_treatment | |
1880 | reg_process_hint_user(struct regulatory_request *user_request) | |
1881 | { | |
1882 | enum reg_request_treatment treatment; | |
0d97a619 LR |
1883 | |
1884 | treatment = __reg_process_hint_user(user_request); | |
1885 | if (treatment == REG_REQ_IGNORE || | |
0c4ddcd2 | 1886 | treatment == REG_REQ_ALREADY_SET) { |
c888393b | 1887 | reg_free_request(user_request); |
0d97a619 LR |
1888 | return treatment; |
1889 | } | |
1890 | ||
0d97a619 LR |
1891 | user_request->intersect = treatment == REG_REQ_INTERSECT; |
1892 | user_request->processed = false; | |
5ad6ef5e | 1893 | |
05f1a3ea | 1894 | reg_update_last_request(user_request); |
0d97a619 LR |
1895 | |
1896 | user_alpha2[0] = user_request->alpha2[0]; | |
1897 | user_alpha2[1] = user_request->alpha2[1]; | |
1898 | ||
fe6631ff | 1899 | return reg_call_crda(user_request); |
0d97a619 LR |
1900 | } |
1901 | ||
21636c7f LR |
1902 | static enum reg_request_treatment |
1903 | __reg_process_hint_driver(struct regulatory_request *driver_request) | |
1904 | { | |
1905 | struct regulatory_request *lr = get_last_request(); | |
1906 | ||
1907 | if (lr->initiator == NL80211_REGDOM_SET_BY_CORE) { | |
1908 | if (regdom_changes(driver_request->alpha2)) | |
1909 | return REG_REQ_OK; | |
1910 | return REG_REQ_ALREADY_SET; | |
1911 | } | |
1912 | ||
1913 | /* | |
1914 | * This would happen if you unplug and plug your card | |
1915 | * back in or if you add a new device for which the previously | |
1916 | * loaded card also agrees on the regulatory domain. | |
1917 | */ | |
1918 | if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER && | |
1919 | !regdom_changes(driver_request->alpha2)) | |
1920 | return REG_REQ_ALREADY_SET; | |
1921 | ||
1922 | return REG_REQ_INTERSECT; | |
1923 | } | |
1924 | ||
1925 | /** | |
1926 | * reg_process_hint_driver - process driver regulatory requests | |
1927 | * @driver_request: a pending driver regulatory request | |
1928 | * | |
1929 | * The wireless subsystem can use this function to process | |
1930 | * a regulatory request issued by an 802.11 driver. | |
1931 | * | |
1932 | * Returns one of the different reg request treatment values. | |
1933 | */ | |
1934 | static enum reg_request_treatment | |
1935 | reg_process_hint_driver(struct wiphy *wiphy, | |
1936 | struct regulatory_request *driver_request) | |
1937 | { | |
34f05f54 | 1938 | const struct ieee80211_regdomain *regd, *tmp; |
21636c7f | 1939 | enum reg_request_treatment treatment; |
21636c7f LR |
1940 | |
1941 | treatment = __reg_process_hint_driver(driver_request); | |
1942 | ||
1943 | switch (treatment) { | |
1944 | case REG_REQ_OK: | |
1945 | break; | |
1946 | case REG_REQ_IGNORE: | |
c888393b | 1947 | reg_free_request(driver_request); |
21636c7f LR |
1948 | return treatment; |
1949 | case REG_REQ_INTERSECT: | |
1950 | /* fall through */ | |
1951 | case REG_REQ_ALREADY_SET: | |
1952 | regd = reg_copy_regd(get_cfg80211_regdom()); | |
1953 | if (IS_ERR(regd)) { | |
c888393b | 1954 | reg_free_request(driver_request); |
21636c7f LR |
1955 | return REG_REQ_IGNORE; |
1956 | } | |
34f05f54 AN |
1957 | |
1958 | tmp = get_wiphy_regdom(wiphy); | |
21636c7f | 1959 | rcu_assign_pointer(wiphy->regd, regd); |
34f05f54 | 1960 | rcu_free_regdom(tmp); |
21636c7f LR |
1961 | } |
1962 | ||
21636c7f LR |
1963 | |
1964 | driver_request->intersect = treatment == REG_REQ_INTERSECT; | |
1965 | driver_request->processed = false; | |
5ad6ef5e | 1966 | |
05f1a3ea | 1967 | reg_update_last_request(driver_request); |
21636c7f LR |
1968 | |
1969 | /* | |
1970 | * Since CRDA will not be called in this case as we already | |
1971 | * have applied the requested regulatory domain before we just | |
1972 | * inform userspace we have processed the request | |
1973 | */ | |
1974 | if (treatment == REG_REQ_ALREADY_SET) { | |
1975 | nl80211_send_reg_change_event(driver_request); | |
1976 | reg_set_request_processed(); | |
1977 | return treatment; | |
1978 | } | |
1979 | ||
fe6631ff | 1980 | return reg_call_crda(driver_request); |
21636c7f LR |
1981 | } |
1982 | ||
b23e7a9e LR |
1983 | static enum reg_request_treatment |
1984 | __reg_process_hint_country_ie(struct wiphy *wiphy, | |
1985 | struct regulatory_request *country_ie_request) | |
1986 | { | |
1987 | struct wiphy *last_wiphy = NULL; | |
1988 | struct regulatory_request *lr = get_last_request(); | |
1989 | ||
1990 | if (reg_request_cell_base(lr)) { | |
1991 | /* Trust a Cell base station over the AP's country IE */ | |
1992 | if (regdom_changes(country_ie_request->alpha2)) | |
1993 | return REG_REQ_IGNORE; | |
1994 | return REG_REQ_ALREADY_SET; | |
2a901468 LR |
1995 | } else { |
1996 | if (wiphy->regulatory_flags & REGULATORY_COUNTRY_IE_IGNORE) | |
1997 | return REG_REQ_IGNORE; | |
b23e7a9e LR |
1998 | } |
1999 | ||
b23e7a9e LR |
2000 | if (unlikely(!is_an_alpha2(country_ie_request->alpha2))) |
2001 | return -EINVAL; | |
2f1c6c57 LR |
2002 | |
2003 | if (lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE) | |
2004 | return REG_REQ_OK; | |
2005 | ||
2006 | last_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx); | |
2007 | ||
2008 | if (last_wiphy != wiphy) { | |
b23e7a9e | 2009 | /* |
2f1c6c57 LR |
2010 | * Two cards with two APs claiming different |
2011 | * Country IE alpha2s. We could | |
2012 | * intersect them, but that seems unlikely | |
2013 | * to be correct. Reject second one for now. | |
b23e7a9e | 2014 | */ |
2f1c6c57 LR |
2015 | if (regdom_changes(country_ie_request->alpha2)) |
2016 | return REG_REQ_IGNORE; | |
b23e7a9e LR |
2017 | return REG_REQ_ALREADY_SET; |
2018 | } | |
70dcec5a EG |
2019 | |
2020 | if (regdom_changes(country_ie_request->alpha2)) | |
2f1c6c57 LR |
2021 | return REG_REQ_OK; |
2022 | return REG_REQ_ALREADY_SET; | |
b23e7a9e LR |
2023 | } |
2024 | ||
d1c96a9a | 2025 | /** |
b23e7a9e LR |
2026 | * reg_process_hint_country_ie - process regulatory requests from country IEs |
2027 | * @country_ie_request: a regulatory request from a country IE | |
d1c96a9a | 2028 | * |
b23e7a9e LR |
2029 | * The wireless subsystem can use this function to process |
2030 | * a regulatory request issued by a country Information Element. | |
d1c96a9a | 2031 | * |
2f92212b | 2032 | * Returns one of the different reg request treatment values. |
d1c96a9a | 2033 | */ |
2f92212b | 2034 | static enum reg_request_treatment |
b23e7a9e LR |
2035 | reg_process_hint_country_ie(struct wiphy *wiphy, |
2036 | struct regulatory_request *country_ie_request) | |
b2e1b302 | 2037 | { |
2f92212b | 2038 | enum reg_request_treatment treatment; |
761cf7ec | 2039 | |
b23e7a9e | 2040 | treatment = __reg_process_hint_country_ie(wiphy, country_ie_request); |
9c96477d | 2041 | |
2f92212b | 2042 | switch (treatment) { |
2f92212b JB |
2043 | case REG_REQ_OK: |
2044 | break; | |
b23e7a9e LR |
2045 | case REG_REQ_IGNORE: |
2046 | /* fall through */ | |
2047 | case REG_REQ_ALREADY_SET: | |
c888393b | 2048 | reg_free_request(country_ie_request); |
b23e7a9e LR |
2049 | return treatment; |
2050 | case REG_REQ_INTERSECT: | |
c888393b | 2051 | reg_free_request(country_ie_request); |
fb1fc7ad | 2052 | /* |
b23e7a9e LR |
2053 | * This doesn't happen yet, not sure we |
2054 | * ever want to support it for this case. | |
fb1fc7ad | 2055 | */ |
b23e7a9e LR |
2056 | WARN_ONCE(1, "Unexpected intersection for country IEs"); |
2057 | return REG_REQ_IGNORE; | |
3e0c3ff3 | 2058 | } |
b2e1b302 | 2059 | |
b23e7a9e LR |
2060 | country_ie_request->intersect = false; |
2061 | country_ie_request->processed = false; | |
5ad6ef5e | 2062 | |
05f1a3ea | 2063 | reg_update_last_request(country_ie_request); |
3e0c3ff3 | 2064 | |
fe6631ff | 2065 | return reg_call_crda(country_ie_request); |
b2e1b302 LR |
2066 | } |
2067 | ||
30a548c7 | 2068 | /* This processes *all* regulatory hints */ |
1daa37c7 | 2069 | static void reg_process_hint(struct regulatory_request *reg_request) |
fe33eb39 | 2070 | { |
fe33eb39 | 2071 | struct wiphy *wiphy = NULL; |
b3eb7f3f | 2072 | enum reg_request_treatment treatment; |
fe33eb39 | 2073 | |
f4173766 | 2074 | if (reg_request->wiphy_idx != WIPHY_IDX_INVALID) |
fe33eb39 LR |
2075 | wiphy = wiphy_idx_to_wiphy(reg_request->wiphy_idx); |
2076 | ||
b3eb7f3f LR |
2077 | switch (reg_request->initiator) { |
2078 | case NL80211_REGDOM_SET_BY_CORE: | |
2079 | reg_process_hint_core(reg_request); | |
2080 | return; | |
2081 | case NL80211_REGDOM_SET_BY_USER: | |
841b351c | 2082 | reg_process_hint_user(reg_request); |
0d97a619 | 2083 | return; |
b3eb7f3f | 2084 | case NL80211_REGDOM_SET_BY_DRIVER: |
772f0389 IP |
2085 | if (!wiphy) |
2086 | goto out_free; | |
21636c7f LR |
2087 | treatment = reg_process_hint_driver(wiphy, reg_request); |
2088 | break; | |
b3eb7f3f | 2089 | case NL80211_REGDOM_SET_BY_COUNTRY_IE: |
772f0389 IP |
2090 | if (!wiphy) |
2091 | goto out_free; | |
b23e7a9e | 2092 | treatment = reg_process_hint_country_ie(wiphy, reg_request); |
b3eb7f3f LR |
2093 | break; |
2094 | default: | |
2095 | WARN(1, "invalid initiator %d\n", reg_request->initiator); | |
772f0389 | 2096 | goto out_free; |
b3eb7f3f LR |
2097 | } |
2098 | ||
841b351c JL |
2099 | /* This is required so that the orig_* parameters are saved. |
2100 | * NOTE: treatment must be set for any case that reaches here! | |
2101 | */ | |
b23e7a9e | 2102 | if (treatment == REG_REQ_ALREADY_SET && wiphy && |
ad932f04 | 2103 | wiphy->regulatory_flags & REGULATORY_STRICT_REG) { |
b23e7a9e | 2104 | wiphy_update_regulatory(wiphy, reg_request->initiator); |
ad932f04 AN |
2105 | reg_check_channels(); |
2106 | } | |
772f0389 IP |
2107 | |
2108 | return; | |
2109 | ||
2110 | out_free: | |
c888393b | 2111 | reg_free_request(reg_request); |
fe33eb39 LR |
2112 | } |
2113 | ||
ef51fb1d AN |
2114 | static bool reg_only_self_managed_wiphys(void) |
2115 | { | |
2116 | struct cfg80211_registered_device *rdev; | |
2117 | struct wiphy *wiphy; | |
2118 | bool self_managed_found = false; | |
2119 | ||
2120 | ASSERT_RTNL(); | |
2121 | ||
2122 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) { | |
2123 | wiphy = &rdev->wiphy; | |
2124 | if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) | |
2125 | self_managed_found = true; | |
2126 | else | |
2127 | return false; | |
2128 | } | |
2129 | ||
2130 | /* make sure at least one self-managed wiphy exists */ | |
2131 | return self_managed_found; | |
2132 | } | |
2133 | ||
b2e253cf LR |
2134 | /* |
2135 | * Processes regulatory hints, this is all the NL80211_REGDOM_SET_BY_* | |
2136 | * Regulatory hints come on a first come first serve basis and we | |
2137 | * must process each one atomically. | |
2138 | */ | |
fe33eb39 | 2139 | static void reg_process_pending_hints(void) |
b0e2880b | 2140 | { |
c492db37 | 2141 | struct regulatory_request *reg_request, *lr; |
fe33eb39 | 2142 | |
c492db37 | 2143 | lr = get_last_request(); |
b0e2880b | 2144 | |
b2e253cf | 2145 | /* When last_request->processed becomes true this will be rescheduled */ |
c492db37 | 2146 | if (lr && !lr->processed) { |
96cce12f | 2147 | reg_process_hint(lr); |
5fe231e8 | 2148 | return; |
b2e253cf LR |
2149 | } |
2150 | ||
fe33eb39 | 2151 | spin_lock(®_requests_lock); |
fe33eb39 | 2152 | |
b2e253cf | 2153 | if (list_empty(®_requests_list)) { |
d951c1dd | 2154 | spin_unlock(®_requests_lock); |
5fe231e8 | 2155 | return; |
fe33eb39 | 2156 | } |
b2e253cf LR |
2157 | |
2158 | reg_request = list_first_entry(®_requests_list, | |
2159 | struct regulatory_request, | |
2160 | list); | |
2161 | list_del_init(®_request->list); | |
2162 | ||
fe33eb39 | 2163 | spin_unlock(®_requests_lock); |
b0e2880b | 2164 | |
ef51fb1d AN |
2165 | if (reg_only_self_managed_wiphys()) { |
2166 | reg_free_request(reg_request); | |
2167 | return; | |
2168 | } | |
2169 | ||
1daa37c7 | 2170 | reg_process_hint(reg_request); |
2e54a689 B |
2171 | |
2172 | lr = get_last_request(); | |
2173 | ||
2174 | spin_lock(®_requests_lock); | |
2175 | if (!list_empty(®_requests_list) && lr && lr->processed) | |
2176 | schedule_work(®_work); | |
2177 | spin_unlock(®_requests_lock); | |
fe33eb39 LR |
2178 | } |
2179 | ||
e38f8a7a LR |
2180 | /* Processes beacon hints -- this has nothing to do with country IEs */ |
2181 | static void reg_process_pending_beacon_hints(void) | |
2182 | { | |
79c97e97 | 2183 | struct cfg80211_registered_device *rdev; |
e38f8a7a LR |
2184 | struct reg_beacon *pending_beacon, *tmp; |
2185 | ||
e38f8a7a LR |
2186 | /* This goes through the _pending_ beacon list */ |
2187 | spin_lock_bh(®_pending_beacons_lock); | |
2188 | ||
e38f8a7a LR |
2189 | list_for_each_entry_safe(pending_beacon, tmp, |
2190 | ®_pending_beacons, list) { | |
e38f8a7a LR |
2191 | list_del_init(&pending_beacon->list); |
2192 | ||
2193 | /* Applies the beacon hint to current wiphys */ | |
79c97e97 JB |
2194 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) |
2195 | wiphy_update_new_beacon(&rdev->wiphy, pending_beacon); | |
e38f8a7a LR |
2196 | |
2197 | /* Remembers the beacon hint for new wiphys or reg changes */ | |
2198 | list_add_tail(&pending_beacon->list, ®_beacon_list); | |
2199 | } | |
2200 | ||
2201 | spin_unlock_bh(®_pending_beacons_lock); | |
e38f8a7a LR |
2202 | } |
2203 | ||
b0d7aa59 JD |
2204 | static void reg_process_self_managed_hints(void) |
2205 | { | |
2206 | struct cfg80211_registered_device *rdev; | |
2207 | struct wiphy *wiphy; | |
2208 | const struct ieee80211_regdomain *tmp; | |
2209 | const struct ieee80211_regdomain *regd; | |
2210 | enum ieee80211_band band; | |
2211 | struct regulatory_request request = {}; | |
2212 | ||
2213 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) { | |
2214 | wiphy = &rdev->wiphy; | |
2215 | ||
2216 | spin_lock(®_requests_lock); | |
2217 | regd = rdev->requested_regd; | |
2218 | rdev->requested_regd = NULL; | |
2219 | spin_unlock(®_requests_lock); | |
2220 | ||
2221 | if (regd == NULL) | |
2222 | continue; | |
2223 | ||
2224 | tmp = get_wiphy_regdom(wiphy); | |
2225 | rcu_assign_pointer(wiphy->regd, regd); | |
2226 | rcu_free_regdom(tmp); | |
2227 | ||
2228 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) | |
2229 | handle_band_custom(wiphy, wiphy->bands[band], regd); | |
2230 | ||
2231 | reg_process_ht_flags(wiphy); | |
2232 | ||
2233 | request.wiphy_idx = get_wiphy_idx(wiphy); | |
2234 | request.alpha2[0] = regd->alpha2[0]; | |
2235 | request.alpha2[1] = regd->alpha2[1]; | |
2236 | request.initiator = NL80211_REGDOM_SET_BY_DRIVER; | |
2237 | ||
2238 | nl80211_send_wiphy_reg_change_event(&request); | |
2239 | } | |
2240 | ||
2241 | reg_check_channels(); | |
2242 | } | |
2243 | ||
fe33eb39 LR |
2244 | static void reg_todo(struct work_struct *work) |
2245 | { | |
5fe231e8 | 2246 | rtnl_lock(); |
fe33eb39 | 2247 | reg_process_pending_hints(); |
e38f8a7a | 2248 | reg_process_pending_beacon_hints(); |
b0d7aa59 | 2249 | reg_process_self_managed_hints(); |
5fe231e8 | 2250 | rtnl_unlock(); |
fe33eb39 LR |
2251 | } |
2252 | ||
fe33eb39 LR |
2253 | static void queue_regulatory_request(struct regulatory_request *request) |
2254 | { | |
d4f2c881 JB |
2255 | request->alpha2[0] = toupper(request->alpha2[0]); |
2256 | request->alpha2[1] = toupper(request->alpha2[1]); | |
c61029c7 | 2257 | |
fe33eb39 LR |
2258 | spin_lock(®_requests_lock); |
2259 | list_add_tail(&request->list, ®_requests_list); | |
2260 | spin_unlock(®_requests_lock); | |
2261 | ||
2262 | schedule_work(®_work); | |
2263 | } | |
2264 | ||
09d989d1 LR |
2265 | /* |
2266 | * Core regulatory hint -- happens during cfg80211_init() | |
2267 | * and when we restore regulatory settings. | |
2268 | */ | |
ba25c141 LR |
2269 | static int regulatory_hint_core(const char *alpha2) |
2270 | { | |
2271 | struct regulatory_request *request; | |
2272 | ||
1a919318 | 2273 | request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); |
ba25c141 LR |
2274 | if (!request) |
2275 | return -ENOMEM; | |
2276 | ||
2277 | request->alpha2[0] = alpha2[0]; | |
2278 | request->alpha2[1] = alpha2[1]; | |
7db90f4a | 2279 | request->initiator = NL80211_REGDOM_SET_BY_CORE; |
ba25c141 | 2280 | |
31e99729 | 2281 | queue_regulatory_request(request); |
5078b2e3 | 2282 | |
fe33eb39 | 2283 | return 0; |
ba25c141 LR |
2284 | } |
2285 | ||
fe33eb39 | 2286 | /* User hints */ |
57b5ce07 LR |
2287 | int regulatory_hint_user(const char *alpha2, |
2288 | enum nl80211_user_reg_hint_type user_reg_hint_type) | |
b2e1b302 | 2289 | { |
fe33eb39 LR |
2290 | struct regulatory_request *request; |
2291 | ||
fdc9d7b2 JB |
2292 | if (WARN_ON(!alpha2)) |
2293 | return -EINVAL; | |
b2e1b302 | 2294 | |
fe33eb39 LR |
2295 | request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); |
2296 | if (!request) | |
2297 | return -ENOMEM; | |
2298 | ||
f4173766 | 2299 | request->wiphy_idx = WIPHY_IDX_INVALID; |
fe33eb39 LR |
2300 | request->alpha2[0] = alpha2[0]; |
2301 | request->alpha2[1] = alpha2[1]; | |
e12822e1 | 2302 | request->initiator = NL80211_REGDOM_SET_BY_USER; |
57b5ce07 | 2303 | request->user_reg_hint_type = user_reg_hint_type; |
fe33eb39 | 2304 | |
c37722bd I |
2305 | /* Allow calling CRDA again */ |
2306 | reg_crda_timeouts = 0; | |
2307 | ||
fe33eb39 LR |
2308 | queue_regulatory_request(request); |
2309 | ||
2310 | return 0; | |
2311 | } | |
2312 | ||
05050753 | 2313 | int regulatory_hint_indoor(bool is_indoor, u32 portid) |
52616f2b | 2314 | { |
05050753 | 2315 | spin_lock(®_indoor_lock); |
52616f2b | 2316 | |
05050753 I |
2317 | /* It is possible that more than one user space process is trying to |
2318 | * configure the indoor setting. To handle such cases, clear the indoor | |
2319 | * setting in case that some process does not think that the device | |
2320 | * is operating in an indoor environment. In addition, if a user space | |
2321 | * process indicates that it is controlling the indoor setting, save its | |
2322 | * portid, i.e., make it the owner. | |
2323 | */ | |
2324 | reg_is_indoor = is_indoor; | |
2325 | if (reg_is_indoor) { | |
2326 | if (!reg_is_indoor_portid) | |
2327 | reg_is_indoor_portid = portid; | |
2328 | } else { | |
2329 | reg_is_indoor_portid = 0; | |
2330 | } | |
52616f2b | 2331 | |
05050753 | 2332 | spin_unlock(®_indoor_lock); |
52616f2b | 2333 | |
05050753 I |
2334 | if (!is_indoor) |
2335 | reg_check_channels(); | |
52616f2b IP |
2336 | |
2337 | return 0; | |
2338 | } | |
2339 | ||
05050753 I |
2340 | void regulatory_netlink_notify(u32 portid) |
2341 | { | |
2342 | spin_lock(®_indoor_lock); | |
2343 | ||
2344 | if (reg_is_indoor_portid != portid) { | |
2345 | spin_unlock(®_indoor_lock); | |
2346 | return; | |
2347 | } | |
2348 | ||
2349 | reg_is_indoor = false; | |
2350 | reg_is_indoor_portid = 0; | |
2351 | ||
2352 | spin_unlock(®_indoor_lock); | |
2353 | ||
2354 | reg_check_channels(); | |
2355 | } | |
2356 | ||
fe33eb39 LR |
2357 | /* Driver hints */ |
2358 | int regulatory_hint(struct wiphy *wiphy, const char *alpha2) | |
2359 | { | |
2360 | struct regulatory_request *request; | |
2361 | ||
fdc9d7b2 JB |
2362 | if (WARN_ON(!alpha2 || !wiphy)) |
2363 | return -EINVAL; | |
fe33eb39 | 2364 | |
4f7b9140 LR |
2365 | wiphy->regulatory_flags &= ~REGULATORY_CUSTOM_REG; |
2366 | ||
fe33eb39 LR |
2367 | request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); |
2368 | if (!request) | |
2369 | return -ENOMEM; | |
2370 | ||
2371 | request->wiphy_idx = get_wiphy_idx(wiphy); | |
2372 | ||
fe33eb39 LR |
2373 | request->alpha2[0] = alpha2[0]; |
2374 | request->alpha2[1] = alpha2[1]; | |
7db90f4a | 2375 | request->initiator = NL80211_REGDOM_SET_BY_DRIVER; |
fe33eb39 | 2376 | |
c37722bd I |
2377 | /* Allow calling CRDA again */ |
2378 | reg_crda_timeouts = 0; | |
2379 | ||
fe33eb39 LR |
2380 | queue_regulatory_request(request); |
2381 | ||
2382 | return 0; | |
b2e1b302 LR |
2383 | } |
2384 | EXPORT_SYMBOL(regulatory_hint); | |
2385 | ||
789fd033 LR |
2386 | void regulatory_hint_country_ie(struct wiphy *wiphy, enum ieee80211_band band, |
2387 | const u8 *country_ie, u8 country_ie_len) | |
3f2355cb | 2388 | { |
3f2355cb | 2389 | char alpha2[2]; |
3f2355cb | 2390 | enum environment_cap env = ENVIRON_ANY; |
db2424c5 | 2391 | struct regulatory_request *request = NULL, *lr; |
d335fe63 | 2392 | |
3f2355cb LR |
2393 | /* IE len must be evenly divisible by 2 */ |
2394 | if (country_ie_len & 0x01) | |
db2424c5 | 2395 | return; |
3f2355cb LR |
2396 | |
2397 | if (country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN) | |
db2424c5 JB |
2398 | return; |
2399 | ||
2400 | request = kzalloc(sizeof(*request), GFP_KERNEL); | |
2401 | if (!request) | |
2402 | return; | |
3f2355cb | 2403 | |
3f2355cb LR |
2404 | alpha2[0] = country_ie[0]; |
2405 | alpha2[1] = country_ie[1]; | |
2406 | ||
2407 | if (country_ie[2] == 'I') | |
2408 | env = ENVIRON_INDOOR; | |
2409 | else if (country_ie[2] == 'O') | |
2410 | env = ENVIRON_OUTDOOR; | |
2411 | ||
db2424c5 JB |
2412 | rcu_read_lock(); |
2413 | lr = get_last_request(); | |
2414 | ||
2415 | if (unlikely(!lr)) | |
2416 | goto out; | |
2417 | ||
fb1fc7ad | 2418 | /* |
8b19e6ca | 2419 | * We will run this only upon a successful connection on cfg80211. |
4b44c8bc | 2420 | * We leave conflict resolution to the workqueue, where can hold |
5fe231e8 | 2421 | * the RTNL. |
fb1fc7ad | 2422 | */ |
c492db37 JB |
2423 | if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE && |
2424 | lr->wiphy_idx != WIPHY_IDX_INVALID) | |
4b44c8bc | 2425 | goto out; |
3f2355cb | 2426 | |
fe33eb39 | 2427 | request->wiphy_idx = get_wiphy_idx(wiphy); |
4f366c5d JL |
2428 | request->alpha2[0] = alpha2[0]; |
2429 | request->alpha2[1] = alpha2[1]; | |
7db90f4a | 2430 | request->initiator = NL80211_REGDOM_SET_BY_COUNTRY_IE; |
fe33eb39 LR |
2431 | request->country_ie_env = env; |
2432 | ||
c37722bd I |
2433 | /* Allow calling CRDA again */ |
2434 | reg_crda_timeouts = 0; | |
2435 | ||
fe33eb39 | 2436 | queue_regulatory_request(request); |
db2424c5 | 2437 | request = NULL; |
3f2355cb | 2438 | out: |
db2424c5 JB |
2439 | kfree(request); |
2440 | rcu_read_unlock(); | |
3f2355cb | 2441 | } |
b2e1b302 | 2442 | |
09d989d1 LR |
2443 | static void restore_alpha2(char *alpha2, bool reset_user) |
2444 | { | |
2445 | /* indicates there is no alpha2 to consider for restoration */ | |
2446 | alpha2[0] = '9'; | |
2447 | alpha2[1] = '7'; | |
2448 | ||
2449 | /* The user setting has precedence over the module parameter */ | |
2450 | if (is_user_regdom_saved()) { | |
2451 | /* Unless we're asked to ignore it and reset it */ | |
2452 | if (reset_user) { | |
1a919318 | 2453 | REG_DBG_PRINT("Restoring regulatory settings including user preference\n"); |
09d989d1 LR |
2454 | user_alpha2[0] = '9'; |
2455 | user_alpha2[1] = '7'; | |
2456 | ||
2457 | /* | |
2458 | * If we're ignoring user settings, we still need to | |
2459 | * check the module parameter to ensure we put things | |
2460 | * back as they were for a full restore. | |
2461 | */ | |
2462 | if (!is_world_regdom(ieee80211_regdom)) { | |
1a919318 JB |
2463 | REG_DBG_PRINT("Keeping preference on module parameter ieee80211_regdom: %c%c\n", |
2464 | ieee80211_regdom[0], ieee80211_regdom[1]); | |
09d989d1 LR |
2465 | alpha2[0] = ieee80211_regdom[0]; |
2466 | alpha2[1] = ieee80211_regdom[1]; | |
2467 | } | |
2468 | } else { | |
1a919318 JB |
2469 | REG_DBG_PRINT("Restoring regulatory settings while preserving user preference for: %c%c\n", |
2470 | user_alpha2[0], user_alpha2[1]); | |
09d989d1 LR |
2471 | alpha2[0] = user_alpha2[0]; |
2472 | alpha2[1] = user_alpha2[1]; | |
2473 | } | |
2474 | } else if (!is_world_regdom(ieee80211_regdom)) { | |
1a919318 JB |
2475 | REG_DBG_PRINT("Keeping preference on module parameter ieee80211_regdom: %c%c\n", |
2476 | ieee80211_regdom[0], ieee80211_regdom[1]); | |
09d989d1 LR |
2477 | alpha2[0] = ieee80211_regdom[0]; |
2478 | alpha2[1] = ieee80211_regdom[1]; | |
2479 | } else | |
d91e41b6 | 2480 | REG_DBG_PRINT("Restoring regulatory settings\n"); |
09d989d1 LR |
2481 | } |
2482 | ||
5ce543d1 RM |
2483 | static void restore_custom_reg_settings(struct wiphy *wiphy) |
2484 | { | |
2485 | struct ieee80211_supported_band *sband; | |
2486 | enum ieee80211_band band; | |
2487 | struct ieee80211_channel *chan; | |
2488 | int i; | |
2489 | ||
2490 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) { | |
2491 | sband = wiphy->bands[band]; | |
2492 | if (!sband) | |
2493 | continue; | |
2494 | for (i = 0; i < sband->n_channels; i++) { | |
2495 | chan = &sband->channels[i]; | |
2496 | chan->flags = chan->orig_flags; | |
2497 | chan->max_antenna_gain = chan->orig_mag; | |
2498 | chan->max_power = chan->orig_mpwr; | |
899852af | 2499 | chan->beacon_found = false; |
5ce543d1 RM |
2500 | } |
2501 | } | |
2502 | } | |
2503 | ||
09d989d1 LR |
2504 | /* |
2505 | * Restoring regulatory settings involves ingoring any | |
2506 | * possibly stale country IE information and user regulatory | |
2507 | * settings if so desired, this includes any beacon hints | |
2508 | * learned as we could have traveled outside to another country | |
2509 | * after disconnection. To restore regulatory settings we do | |
2510 | * exactly what we did at bootup: | |
2511 | * | |
2512 | * - send a core regulatory hint | |
2513 | * - send a user regulatory hint if applicable | |
2514 | * | |
2515 | * Device drivers that send a regulatory hint for a specific country | |
2516 | * keep their own regulatory domain on wiphy->regd so that does does | |
2517 | * not need to be remembered. | |
2518 | */ | |
2519 | static void restore_regulatory_settings(bool reset_user) | |
2520 | { | |
2521 | char alpha2[2]; | |
cee0bec5 | 2522 | char world_alpha2[2]; |
09d989d1 | 2523 | struct reg_beacon *reg_beacon, *btmp; |
14609555 | 2524 | LIST_HEAD(tmp_reg_req_list); |
5ce543d1 | 2525 | struct cfg80211_registered_device *rdev; |
09d989d1 | 2526 | |
5fe231e8 JB |
2527 | ASSERT_RTNL(); |
2528 | ||
05050753 I |
2529 | /* |
2530 | * Clear the indoor setting in case that it is not controlled by user | |
2531 | * space, as otherwise there is no guarantee that the device is still | |
2532 | * operating in an indoor environment. | |
2533 | */ | |
2534 | spin_lock(®_indoor_lock); | |
2535 | if (reg_is_indoor && !reg_is_indoor_portid) { | |
2536 | reg_is_indoor = false; | |
2537 | reg_check_channels(); | |
2538 | } | |
2539 | spin_unlock(®_indoor_lock); | |
52616f2b | 2540 | |
2d319867 | 2541 | reset_regdomains(true, &world_regdom); |
09d989d1 LR |
2542 | restore_alpha2(alpha2, reset_user); |
2543 | ||
14609555 LR |
2544 | /* |
2545 | * If there's any pending requests we simply | |
2546 | * stash them to a temporary pending queue and | |
2547 | * add then after we've restored regulatory | |
2548 | * settings. | |
2549 | */ | |
2550 | spin_lock(®_requests_lock); | |
eeca9fce | 2551 | list_splice_tail_init(®_requests_list, &tmp_reg_req_list); |
14609555 LR |
2552 | spin_unlock(®_requests_lock); |
2553 | ||
09d989d1 LR |
2554 | /* Clear beacon hints */ |
2555 | spin_lock_bh(®_pending_beacons_lock); | |
fea9bced JB |
2556 | list_for_each_entry_safe(reg_beacon, btmp, ®_pending_beacons, list) { |
2557 | list_del(®_beacon->list); | |
2558 | kfree(reg_beacon); | |
09d989d1 LR |
2559 | } |
2560 | spin_unlock_bh(®_pending_beacons_lock); | |
2561 | ||
fea9bced JB |
2562 | list_for_each_entry_safe(reg_beacon, btmp, ®_beacon_list, list) { |
2563 | list_del(®_beacon->list); | |
2564 | kfree(reg_beacon); | |
09d989d1 LR |
2565 | } |
2566 | ||
2567 | /* First restore to the basic regulatory settings */ | |
379b82f4 JB |
2568 | world_alpha2[0] = cfg80211_world_regdom->alpha2[0]; |
2569 | world_alpha2[1] = cfg80211_world_regdom->alpha2[1]; | |
09d989d1 | 2570 | |
5ce543d1 | 2571 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) { |
b0d7aa59 JD |
2572 | if (rdev->wiphy.regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) |
2573 | continue; | |
a2f73b6c | 2574 | if (rdev->wiphy.regulatory_flags & REGULATORY_CUSTOM_REG) |
5ce543d1 RM |
2575 | restore_custom_reg_settings(&rdev->wiphy); |
2576 | } | |
2577 | ||
cee0bec5 | 2578 | regulatory_hint_core(world_alpha2); |
09d989d1 LR |
2579 | |
2580 | /* | |
2581 | * This restores the ieee80211_regdom module parameter | |
2582 | * preference or the last user requested regulatory | |
2583 | * settings, user regulatory settings takes precedence. | |
2584 | */ | |
2585 | if (is_an_alpha2(alpha2)) | |
57b5ce07 | 2586 | regulatory_hint_user(user_alpha2, NL80211_USER_REG_HINT_USER); |
09d989d1 | 2587 | |
14609555 | 2588 | spin_lock(®_requests_lock); |
11cff96c | 2589 | list_splice_tail_init(&tmp_reg_req_list, ®_requests_list); |
14609555 LR |
2590 | spin_unlock(®_requests_lock); |
2591 | ||
14609555 LR |
2592 | REG_DBG_PRINT("Kicking the queue\n"); |
2593 | ||
2594 | schedule_work(®_work); | |
2595 | } | |
09d989d1 LR |
2596 | |
2597 | void regulatory_hint_disconnect(void) | |
2598 | { | |
1a919318 | 2599 | REG_DBG_PRINT("All devices are disconnected, going to restore regulatory settings\n"); |
09d989d1 LR |
2600 | restore_regulatory_settings(false); |
2601 | } | |
2602 | ||
e38f8a7a LR |
2603 | static bool freq_is_chan_12_13_14(u16 freq) |
2604 | { | |
59eb21a6 BR |
2605 | if (freq == ieee80211_channel_to_frequency(12, IEEE80211_BAND_2GHZ) || |
2606 | freq == ieee80211_channel_to_frequency(13, IEEE80211_BAND_2GHZ) || | |
2607 | freq == ieee80211_channel_to_frequency(14, IEEE80211_BAND_2GHZ)) | |
e38f8a7a LR |
2608 | return true; |
2609 | return false; | |
2610 | } | |
2611 | ||
3ebfa6e7 LR |
2612 | static bool pending_reg_beacon(struct ieee80211_channel *beacon_chan) |
2613 | { | |
2614 | struct reg_beacon *pending_beacon; | |
2615 | ||
2616 | list_for_each_entry(pending_beacon, ®_pending_beacons, list) | |
2617 | if (beacon_chan->center_freq == | |
2618 | pending_beacon->chan.center_freq) | |
2619 | return true; | |
2620 | return false; | |
2621 | } | |
2622 | ||
e38f8a7a LR |
2623 | int regulatory_hint_found_beacon(struct wiphy *wiphy, |
2624 | struct ieee80211_channel *beacon_chan, | |
2625 | gfp_t gfp) | |
2626 | { | |
2627 | struct reg_beacon *reg_beacon; | |
3ebfa6e7 | 2628 | bool processing; |
e38f8a7a | 2629 | |
1a919318 JB |
2630 | if (beacon_chan->beacon_found || |
2631 | beacon_chan->flags & IEEE80211_CHAN_RADAR || | |
e38f8a7a | 2632 | (beacon_chan->band == IEEE80211_BAND_2GHZ && |
1a919318 | 2633 | !freq_is_chan_12_13_14(beacon_chan->center_freq))) |
e38f8a7a LR |
2634 | return 0; |
2635 | ||
3ebfa6e7 LR |
2636 | spin_lock_bh(®_pending_beacons_lock); |
2637 | processing = pending_reg_beacon(beacon_chan); | |
2638 | spin_unlock_bh(®_pending_beacons_lock); | |
2639 | ||
2640 | if (processing) | |
e38f8a7a LR |
2641 | return 0; |
2642 | ||
2643 | reg_beacon = kzalloc(sizeof(struct reg_beacon), gfp); | |
2644 | if (!reg_beacon) | |
2645 | return -ENOMEM; | |
2646 | ||
1a919318 | 2647 | REG_DBG_PRINT("Found new beacon on frequency: %d MHz (Ch %d) on %s\n", |
4113f751 LR |
2648 | beacon_chan->center_freq, |
2649 | ieee80211_frequency_to_channel(beacon_chan->center_freq), | |
2650 | wiphy_name(wiphy)); | |
2651 | ||
e38f8a7a | 2652 | memcpy(®_beacon->chan, beacon_chan, |
1a919318 | 2653 | sizeof(struct ieee80211_channel)); |
e38f8a7a LR |
2654 | |
2655 | /* | |
2656 | * Since we can be called from BH or and non-BH context | |
2657 | * we must use spin_lock_bh() | |
2658 | */ | |
2659 | spin_lock_bh(®_pending_beacons_lock); | |
2660 | list_add_tail(®_beacon->list, ®_pending_beacons); | |
2661 | spin_unlock_bh(®_pending_beacons_lock); | |
2662 | ||
2663 | schedule_work(®_work); | |
2664 | ||
2665 | return 0; | |
2666 | } | |
2667 | ||
a3d2eaf0 | 2668 | static void print_rd_rules(const struct ieee80211_regdomain *rd) |
b2e1b302 LR |
2669 | { |
2670 | unsigned int i; | |
a3d2eaf0 JB |
2671 | const struct ieee80211_reg_rule *reg_rule = NULL; |
2672 | const struct ieee80211_freq_range *freq_range = NULL; | |
2673 | const struct ieee80211_power_rule *power_rule = NULL; | |
089027e5 | 2674 | char bw[32], cac_time[32]; |
b2e1b302 | 2675 | |
089027e5 | 2676 | pr_info(" (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp), (dfs_cac_time)\n"); |
b2e1b302 LR |
2677 | |
2678 | for (i = 0; i < rd->n_reg_rules; i++) { | |
2679 | reg_rule = &rd->reg_rules[i]; | |
2680 | freq_range = ®_rule->freq_range; | |
2681 | power_rule = ®_rule->power_rule; | |
2682 | ||
b0dfd2ea JD |
2683 | if (reg_rule->flags & NL80211_RRF_AUTO_BW) |
2684 | snprintf(bw, sizeof(bw), "%d KHz, %d KHz AUTO", | |
2685 | freq_range->max_bandwidth_khz, | |
97524820 JD |
2686 | reg_get_max_bandwidth(rd, reg_rule)); |
2687 | else | |
b0dfd2ea | 2688 | snprintf(bw, sizeof(bw), "%d KHz", |
97524820 JD |
2689 | freq_range->max_bandwidth_khz); |
2690 | ||
089027e5 JD |
2691 | if (reg_rule->flags & NL80211_RRF_DFS) |
2692 | scnprintf(cac_time, sizeof(cac_time), "%u s", | |
2693 | reg_rule->dfs_cac_ms/1000); | |
2694 | else | |
2695 | scnprintf(cac_time, sizeof(cac_time), "N/A"); | |
2696 | ||
2697 | ||
fb1fc7ad LR |
2698 | /* |
2699 | * There may not be documentation for max antenna gain | |
2700 | * in certain regions | |
2701 | */ | |
b2e1b302 | 2702 | if (power_rule->max_antenna_gain) |
089027e5 | 2703 | pr_info(" (%d KHz - %d KHz @ %s), (%d mBi, %d mBm), (%s)\n", |
b2e1b302 LR |
2704 | freq_range->start_freq_khz, |
2705 | freq_range->end_freq_khz, | |
97524820 | 2706 | bw, |
b2e1b302 | 2707 | power_rule->max_antenna_gain, |
089027e5 JD |
2708 | power_rule->max_eirp, |
2709 | cac_time); | |
b2e1b302 | 2710 | else |
089027e5 | 2711 | pr_info(" (%d KHz - %d KHz @ %s), (N/A, %d mBm), (%s)\n", |
b2e1b302 LR |
2712 | freq_range->start_freq_khz, |
2713 | freq_range->end_freq_khz, | |
97524820 | 2714 | bw, |
089027e5 JD |
2715 | power_rule->max_eirp, |
2716 | cac_time); | |
b2e1b302 LR |
2717 | } |
2718 | } | |
2719 | ||
4c7d3982 | 2720 | bool reg_supported_dfs_region(enum nl80211_dfs_regions dfs_region) |
8b60b078 LR |
2721 | { |
2722 | switch (dfs_region) { | |
2723 | case NL80211_DFS_UNSET: | |
2724 | case NL80211_DFS_FCC: | |
2725 | case NL80211_DFS_ETSI: | |
2726 | case NL80211_DFS_JP: | |
2727 | return true; | |
2728 | default: | |
2729 | REG_DBG_PRINT("Ignoring uknown DFS master region: %d\n", | |
2730 | dfs_region); | |
2731 | return false; | |
2732 | } | |
2733 | } | |
2734 | ||
a3d2eaf0 | 2735 | static void print_regdomain(const struct ieee80211_regdomain *rd) |
b2e1b302 | 2736 | { |
c492db37 | 2737 | struct regulatory_request *lr = get_last_request(); |
b2e1b302 | 2738 | |
3f2355cb | 2739 | if (is_intersected_alpha2(rd->alpha2)) { |
c492db37 | 2740 | if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) { |
79c97e97 | 2741 | struct cfg80211_registered_device *rdev; |
c492db37 | 2742 | rdev = cfg80211_rdev_by_wiphy_idx(lr->wiphy_idx); |
79c97e97 | 2743 | if (rdev) { |
e9c0268f | 2744 | pr_info("Current regulatory domain updated by AP to: %c%c\n", |
79c97e97 JB |
2745 | rdev->country_ie_alpha2[0], |
2746 | rdev->country_ie_alpha2[1]); | |
3f2355cb | 2747 | } else |
e9c0268f | 2748 | pr_info("Current regulatory domain intersected:\n"); |
3f2355cb | 2749 | } else |
e9c0268f | 2750 | pr_info("Current regulatory domain intersected:\n"); |
1a919318 | 2751 | } else if (is_world_regdom(rd->alpha2)) { |
e9c0268f | 2752 | pr_info("World regulatory domain updated:\n"); |
1a919318 | 2753 | } else { |
b2e1b302 | 2754 | if (is_unknown_alpha2(rd->alpha2)) |
e9c0268f | 2755 | pr_info("Regulatory domain changed to driver built-in settings (unknown country)\n"); |
57b5ce07 | 2756 | else { |
c492db37 | 2757 | if (reg_request_cell_base(lr)) |
1a919318 | 2758 | pr_info("Regulatory domain changed to country: %c%c by Cell Station\n", |
57b5ce07 LR |
2759 | rd->alpha2[0], rd->alpha2[1]); |
2760 | else | |
1a919318 | 2761 | pr_info("Regulatory domain changed to country: %c%c\n", |
57b5ce07 LR |
2762 | rd->alpha2[0], rd->alpha2[1]); |
2763 | } | |
b2e1b302 | 2764 | } |
1a919318 | 2765 | |
3ef121b5 | 2766 | pr_info(" DFS Master region: %s", reg_dfs_region_str(rd->dfs_region)); |
b2e1b302 LR |
2767 | print_rd_rules(rd); |
2768 | } | |
2769 | ||
2df78167 | 2770 | static void print_regdomain_info(const struct ieee80211_regdomain *rd) |
b2e1b302 | 2771 | { |
e9c0268f | 2772 | pr_info("Regulatory domain: %c%c\n", rd->alpha2[0], rd->alpha2[1]); |
b2e1b302 LR |
2773 | print_rd_rules(rd); |
2774 | } | |
2775 | ||
3b9e5aca LR |
2776 | static int reg_set_rd_core(const struct ieee80211_regdomain *rd) |
2777 | { | |
2778 | if (!is_world_regdom(rd->alpha2)) | |
2779 | return -EINVAL; | |
2780 | update_world_regdomain(rd); | |
2781 | return 0; | |
2782 | } | |
2783 | ||
84721d44 LR |
2784 | static int reg_set_rd_user(const struct ieee80211_regdomain *rd, |
2785 | struct regulatory_request *user_request) | |
2786 | { | |
2787 | const struct ieee80211_regdomain *intersected_rd = NULL; | |
2788 | ||
84721d44 LR |
2789 | if (!regdom_changes(rd->alpha2)) |
2790 | return -EALREADY; | |
2791 | ||
2792 | if (!is_valid_rd(rd)) { | |
2793 | pr_err("Invalid regulatory domain detected:\n"); | |
2794 | print_regdomain_info(rd); | |
2795 | return -EINVAL; | |
2796 | } | |
2797 | ||
2798 | if (!user_request->intersect) { | |
2799 | reset_regdomains(false, rd); | |
2800 | return 0; | |
2801 | } | |
2802 | ||
2803 | intersected_rd = regdom_intersect(rd, get_cfg80211_regdom()); | |
2804 | if (!intersected_rd) | |
2805 | return -EINVAL; | |
2806 | ||
2807 | kfree(rd); | |
2808 | rd = NULL; | |
2809 | reset_regdomains(false, intersected_rd); | |
2810 | ||
2811 | return 0; | |
2812 | } | |
2813 | ||
f5fe3247 LR |
2814 | static int reg_set_rd_driver(const struct ieee80211_regdomain *rd, |
2815 | struct regulatory_request *driver_request) | |
b2e1b302 | 2816 | { |
e9763c3c | 2817 | const struct ieee80211_regdomain *regd; |
9c96477d | 2818 | const struct ieee80211_regdomain *intersected_rd = NULL; |
f5fe3247 | 2819 | const struct ieee80211_regdomain *tmp; |
806a9e39 | 2820 | struct wiphy *request_wiphy; |
6913b49a | 2821 | |
f5fe3247 | 2822 | if (is_world_regdom(rd->alpha2)) |
b2e1b302 LR |
2823 | return -EINVAL; |
2824 | ||
f5fe3247 LR |
2825 | if (!regdom_changes(rd->alpha2)) |
2826 | return -EALREADY; | |
b2e1b302 | 2827 | |
8375af3b | 2828 | if (!is_valid_rd(rd)) { |
e9c0268f | 2829 | pr_err("Invalid regulatory domain detected:\n"); |
8375af3b LR |
2830 | print_regdomain_info(rd); |
2831 | return -EINVAL; | |
b2e1b302 LR |
2832 | } |
2833 | ||
f5fe3247 LR |
2834 | request_wiphy = wiphy_idx_to_wiphy(driver_request->wiphy_idx); |
2835 | if (!request_wiphy) { | |
845f3351 SD |
2836 | queue_delayed_work(system_power_efficient_wq, |
2837 | ®_timeout, 0); | |
de3584bd JB |
2838 | return -ENODEV; |
2839 | } | |
806a9e39 | 2840 | |
f5fe3247 | 2841 | if (!driver_request->intersect) { |
558f6d32 LR |
2842 | if (request_wiphy->regd) |
2843 | return -EALREADY; | |
3e0c3ff3 | 2844 | |
e9763c3c JB |
2845 | regd = reg_copy_regd(rd); |
2846 | if (IS_ERR(regd)) | |
2847 | return PTR_ERR(regd); | |
3e0c3ff3 | 2848 | |
458f4f9e | 2849 | rcu_assign_pointer(request_wiphy->regd, regd); |
379b82f4 | 2850 | reset_regdomains(false, rd); |
b8295acd LR |
2851 | return 0; |
2852 | } | |
2853 | ||
f5fe3247 LR |
2854 | intersected_rd = regdom_intersect(rd, get_cfg80211_regdom()); |
2855 | if (!intersected_rd) | |
2856 | return -EINVAL; | |
b8295acd | 2857 | |
f5fe3247 LR |
2858 | /* |
2859 | * We can trash what CRDA provided now. | |
2860 | * However if a driver requested this specific regulatory | |
2861 | * domain we keep it for its private use | |
2862 | */ | |
2863 | tmp = get_wiphy_regdom(request_wiphy); | |
2864 | rcu_assign_pointer(request_wiphy->regd, rd); | |
2865 | rcu_free_regdom(tmp); | |
b8295acd | 2866 | |
f5fe3247 | 2867 | rd = NULL; |
b7566fc3 | 2868 | |
f5fe3247 | 2869 | reset_regdomains(false, intersected_rd); |
3e0c3ff3 | 2870 | |
f5fe3247 LR |
2871 | return 0; |
2872 | } | |
2873 | ||
01992406 LR |
2874 | static int reg_set_rd_country_ie(const struct ieee80211_regdomain *rd, |
2875 | struct regulatory_request *country_ie_request) | |
f5fe3247 LR |
2876 | { |
2877 | struct wiphy *request_wiphy; | |
b8295acd | 2878 | |
f5fe3247 LR |
2879 | if (!is_alpha2_set(rd->alpha2) && !is_an_alpha2(rd->alpha2) && |
2880 | !is_unknown_alpha2(rd->alpha2)) | |
2881 | return -EINVAL; | |
b8295acd | 2882 | |
f5fe3247 LR |
2883 | /* |
2884 | * Lets only bother proceeding on the same alpha2 if the current | |
2885 | * rd is non static (it means CRDA was present and was used last) | |
2886 | * and the pending request came in from a country IE | |
2887 | */ | |
2888 | ||
2889 | if (!is_valid_rd(rd)) { | |
2890 | pr_err("Invalid regulatory domain detected:\n"); | |
2891 | print_regdomain_info(rd); | |
2892 | return -EINVAL; | |
9c96477d LR |
2893 | } |
2894 | ||
01992406 | 2895 | request_wiphy = wiphy_idx_to_wiphy(country_ie_request->wiphy_idx); |
f5fe3247 | 2896 | if (!request_wiphy) { |
845f3351 SD |
2897 | queue_delayed_work(system_power_efficient_wq, |
2898 | ®_timeout, 0); | |
f5fe3247 LR |
2899 | return -ENODEV; |
2900 | } | |
b2e1b302 | 2901 | |
01992406 | 2902 | if (country_ie_request->intersect) |
f5fe3247 LR |
2903 | return -EINVAL; |
2904 | ||
2905 | reset_regdomains(false, rd); | |
2906 | return 0; | |
2907 | } | |
b2e1b302 | 2908 | |
fb1fc7ad LR |
2909 | /* |
2910 | * Use this call to set the current regulatory domain. Conflicts with | |
b2e1b302 | 2911 | * multiple drivers can be ironed out later. Caller must've already |
458f4f9e | 2912 | * kmalloc'd the rd structure. |
fb1fc7ad | 2913 | */ |
c37722bd I |
2914 | int set_regdom(const struct ieee80211_regdomain *rd, |
2915 | enum ieee80211_regd_source regd_src) | |
b2e1b302 | 2916 | { |
c492db37 | 2917 | struct regulatory_request *lr; |
092008ab | 2918 | bool user_reset = false; |
b2e1b302 LR |
2919 | int r; |
2920 | ||
3b9e5aca LR |
2921 | if (!reg_is_valid_request(rd->alpha2)) { |
2922 | kfree(rd); | |
2923 | return -EINVAL; | |
2924 | } | |
2925 | ||
c37722bd I |
2926 | if (regd_src == REGD_SOURCE_CRDA) |
2927 | reg_crda_timeouts = 0; | |
2928 | ||
c492db37 | 2929 | lr = get_last_request(); |
abc7381b | 2930 | |
b2e1b302 | 2931 | /* Note that this doesn't update the wiphys, this is done below */ |
3b9e5aca LR |
2932 | switch (lr->initiator) { |
2933 | case NL80211_REGDOM_SET_BY_CORE: | |
2934 | r = reg_set_rd_core(rd); | |
2935 | break; | |
2936 | case NL80211_REGDOM_SET_BY_USER: | |
84721d44 | 2937 | r = reg_set_rd_user(rd, lr); |
092008ab | 2938 | user_reset = true; |
84721d44 | 2939 | break; |
3b9e5aca | 2940 | case NL80211_REGDOM_SET_BY_DRIVER: |
f5fe3247 LR |
2941 | r = reg_set_rd_driver(rd, lr); |
2942 | break; | |
3b9e5aca | 2943 | case NL80211_REGDOM_SET_BY_COUNTRY_IE: |
01992406 | 2944 | r = reg_set_rd_country_ie(rd, lr); |
3b9e5aca LR |
2945 | break; |
2946 | default: | |
2947 | WARN(1, "invalid initiator %d\n", lr->initiator); | |
2948 | return -EINVAL; | |
2949 | } | |
2950 | ||
d2372b31 | 2951 | if (r) { |
092008ab JD |
2952 | switch (r) { |
2953 | case -EALREADY: | |
95908535 | 2954 | reg_set_request_processed(); |
092008ab JD |
2955 | break; |
2956 | default: | |
2957 | /* Back to world regulatory in case of errors */ | |
2958 | restore_regulatory_settings(user_reset); | |
2959 | } | |
95908535 | 2960 | |
d2372b31 | 2961 | kfree(rd); |
38fd2143 | 2962 | return r; |
d2372b31 | 2963 | } |
b2e1b302 | 2964 | |
b2e1b302 | 2965 | /* This would make this whole thing pointless */ |
38fd2143 JB |
2966 | if (WARN_ON(!lr->intersect && rd != get_cfg80211_regdom())) |
2967 | return -EINVAL; | |
b2e1b302 LR |
2968 | |
2969 | /* update all wiphys now with the new established regulatory domain */ | |
c492db37 | 2970 | update_all_wiphy_regulatory(lr->initiator); |
b2e1b302 | 2971 | |
458f4f9e | 2972 | print_regdomain(get_cfg80211_regdom()); |
b2e1b302 | 2973 | |
c492db37 | 2974 | nl80211_send_reg_change_event(lr); |
73d54c9e | 2975 | |
b2e253cf LR |
2976 | reg_set_request_processed(); |
2977 | ||
38fd2143 | 2978 | return 0; |
b2e1b302 LR |
2979 | } |
2980 | ||
2c3e861c AN |
2981 | static int __regulatory_set_wiphy_regd(struct wiphy *wiphy, |
2982 | struct ieee80211_regdomain *rd) | |
b0d7aa59 JD |
2983 | { |
2984 | const struct ieee80211_regdomain *regd; | |
2985 | const struct ieee80211_regdomain *prev_regd; | |
2986 | struct cfg80211_registered_device *rdev; | |
2987 | ||
2988 | if (WARN_ON(!wiphy || !rd)) | |
2989 | return -EINVAL; | |
2990 | ||
2991 | if (WARN(!(wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED), | |
2992 | "wiphy should have REGULATORY_WIPHY_SELF_MANAGED\n")) | |
2993 | return -EPERM; | |
2994 | ||
2995 | if (WARN(!is_valid_rd(rd), "Invalid regulatory domain detected\n")) { | |
2996 | print_regdomain_info(rd); | |
2997 | return -EINVAL; | |
2998 | } | |
2999 | ||
3000 | regd = reg_copy_regd(rd); | |
3001 | if (IS_ERR(regd)) | |
3002 | return PTR_ERR(regd); | |
3003 | ||
3004 | rdev = wiphy_to_rdev(wiphy); | |
3005 | ||
3006 | spin_lock(®_requests_lock); | |
3007 | prev_regd = rdev->requested_regd; | |
3008 | rdev->requested_regd = regd; | |
3009 | spin_unlock(®_requests_lock); | |
3010 | ||
3011 | kfree(prev_regd); | |
2c3e861c AN |
3012 | return 0; |
3013 | } | |
3014 | ||
3015 | int regulatory_set_wiphy_regd(struct wiphy *wiphy, | |
3016 | struct ieee80211_regdomain *rd) | |
3017 | { | |
3018 | int ret = __regulatory_set_wiphy_regd(wiphy, rd); | |
3019 | ||
3020 | if (ret) | |
3021 | return ret; | |
b0d7aa59 JD |
3022 | |
3023 | schedule_work(®_work); | |
3024 | return 0; | |
3025 | } | |
3026 | EXPORT_SYMBOL(regulatory_set_wiphy_regd); | |
3027 | ||
2c3e861c AN |
3028 | int regulatory_set_wiphy_regd_sync_rtnl(struct wiphy *wiphy, |
3029 | struct ieee80211_regdomain *rd) | |
3030 | { | |
3031 | int ret; | |
3032 | ||
3033 | ASSERT_RTNL(); | |
3034 | ||
3035 | ret = __regulatory_set_wiphy_regd(wiphy, rd); | |
3036 | if (ret) | |
3037 | return ret; | |
3038 | ||
3039 | /* process the request immediately */ | |
3040 | reg_process_self_managed_hints(); | |
3041 | return 0; | |
3042 | } | |
3043 | EXPORT_SYMBOL(regulatory_set_wiphy_regd_sync_rtnl); | |
3044 | ||
57b5ce07 LR |
3045 | void wiphy_regulatory_register(struct wiphy *wiphy) |
3046 | { | |
23df0b73 AN |
3047 | struct regulatory_request *lr; |
3048 | ||
b0d7aa59 JD |
3049 | /* self-managed devices ignore external hints */ |
3050 | if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) | |
3051 | wiphy->regulatory_flags |= REGULATORY_DISABLE_BEACON_HINTS | | |
3052 | REGULATORY_COUNTRY_IE_IGNORE; | |
3053 | ||
57b5ce07 LR |
3054 | if (!reg_dev_ignore_cell_hint(wiphy)) |
3055 | reg_num_devs_support_basehint++; | |
3056 | ||
23df0b73 AN |
3057 | lr = get_last_request(); |
3058 | wiphy_update_regulatory(wiphy, lr->initiator); | |
57b5ce07 LR |
3059 | } |
3060 | ||
bfead080 | 3061 | void wiphy_regulatory_deregister(struct wiphy *wiphy) |
3f2355cb | 3062 | { |
0ad8acaf | 3063 | struct wiphy *request_wiphy = NULL; |
c492db37 | 3064 | struct regulatory_request *lr; |
761cf7ec | 3065 | |
c492db37 | 3066 | lr = get_last_request(); |
abc7381b | 3067 | |
57b5ce07 LR |
3068 | if (!reg_dev_ignore_cell_hint(wiphy)) |
3069 | reg_num_devs_support_basehint--; | |
3070 | ||
458f4f9e | 3071 | rcu_free_regdom(get_wiphy_regdom(wiphy)); |
34dd886c | 3072 | RCU_INIT_POINTER(wiphy->regd, NULL); |
0ef9ccdd | 3073 | |
c492db37 JB |
3074 | if (lr) |
3075 | request_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx); | |
806a9e39 | 3076 | |
0ef9ccdd | 3077 | if (!request_wiphy || request_wiphy != wiphy) |
38fd2143 | 3078 | return; |
0ef9ccdd | 3079 | |
c492db37 JB |
3080 | lr->wiphy_idx = WIPHY_IDX_INVALID; |
3081 | lr->country_ie_env = ENVIRON_ANY; | |
3f2355cb LR |
3082 | } |
3083 | ||
a90c7a31 LR |
3084 | static void reg_timeout_work(struct work_struct *work) |
3085 | { | |
1a919318 | 3086 | REG_DBG_PRINT("Timeout while waiting for CRDA to reply, restoring regulatory settings\n"); |
f77b86d7 | 3087 | rtnl_lock(); |
c37722bd | 3088 | reg_crda_timeouts++; |
a90c7a31 | 3089 | restore_regulatory_settings(true); |
f77b86d7 | 3090 | rtnl_unlock(); |
a90c7a31 LR |
3091 | } |
3092 | ||
174e0cd2 IP |
3093 | /* |
3094 | * See http://www.fcc.gov/document/5-ghz-unlicensed-spectrum-unii, for | |
3095 | * UNII band definitions | |
3096 | */ | |
3097 | int cfg80211_get_unii(int freq) | |
3098 | { | |
3099 | /* UNII-1 */ | |
3100 | if (freq >= 5150 && freq <= 5250) | |
3101 | return 0; | |
3102 | ||
3103 | /* UNII-2A */ | |
3104 | if (freq > 5250 && freq <= 5350) | |
3105 | return 1; | |
3106 | ||
3107 | /* UNII-2B */ | |
3108 | if (freq > 5350 && freq <= 5470) | |
3109 | return 2; | |
3110 | ||
3111 | /* UNII-2C */ | |
3112 | if (freq > 5470 && freq <= 5725) | |
3113 | return 3; | |
3114 | ||
3115 | /* UNII-3 */ | |
3116 | if (freq > 5725 && freq <= 5825) | |
3117 | return 4; | |
3118 | ||
3119 | return -EINVAL; | |
3120 | } | |
3121 | ||
c8866e55 IP |
3122 | bool regulatory_indoor_allowed(void) |
3123 | { | |
3124 | return reg_is_indoor; | |
3125 | } | |
3126 | ||
2fcc9f73 | 3127 | int __init regulatory_init(void) |
b2e1b302 | 3128 | { |
bcf4f99b | 3129 | int err = 0; |
734366de | 3130 | |
b2e1b302 LR |
3131 | reg_pdev = platform_device_register_simple("regulatory", 0, NULL, 0); |
3132 | if (IS_ERR(reg_pdev)) | |
3133 | return PTR_ERR(reg_pdev); | |
734366de | 3134 | |
fe33eb39 | 3135 | spin_lock_init(®_requests_lock); |
e38f8a7a | 3136 | spin_lock_init(®_pending_beacons_lock); |
05050753 | 3137 | spin_lock_init(®_indoor_lock); |
fe33eb39 | 3138 | |
80007efe LR |
3139 | reg_regdb_size_check(); |
3140 | ||
458f4f9e | 3141 | rcu_assign_pointer(cfg80211_regdomain, cfg80211_world_regdom); |
734366de | 3142 | |
09d989d1 LR |
3143 | user_alpha2[0] = '9'; |
3144 | user_alpha2[1] = '7'; | |
3145 | ||
ae9e4b0d | 3146 | /* We always try to get an update for the static regdomain */ |
458f4f9e | 3147 | err = regulatory_hint_core(cfg80211_world_regdom->alpha2); |
ba25c141 | 3148 | if (err) { |
bcf4f99b LR |
3149 | if (err == -ENOMEM) |
3150 | return err; | |
3151 | /* | |
3152 | * N.B. kobject_uevent_env() can fail mainly for when we're out | |
3153 | * memory which is handled and propagated appropriately above | |
3154 | * but it can also fail during a netlink_broadcast() or during | |
3155 | * early boot for call_usermodehelper(). For now treat these | |
3156 | * errors as non-fatal. | |
3157 | */ | |
e9c0268f | 3158 | pr_err("kobject_uevent_env() was unable to call CRDA during init\n"); |
bcf4f99b | 3159 | } |
734366de | 3160 | |
ae9e4b0d LR |
3161 | /* |
3162 | * Finally, if the user set the module parameter treat it | |
3163 | * as a user hint. | |
3164 | */ | |
3165 | if (!is_world_regdom(ieee80211_regdom)) | |
57b5ce07 LR |
3166 | regulatory_hint_user(ieee80211_regdom, |
3167 | NL80211_USER_REG_HINT_USER); | |
ae9e4b0d | 3168 | |
b2e1b302 LR |
3169 | return 0; |
3170 | } | |
3171 | ||
1a919318 | 3172 | void regulatory_exit(void) |
b2e1b302 | 3173 | { |
fe33eb39 | 3174 | struct regulatory_request *reg_request, *tmp; |
e38f8a7a | 3175 | struct reg_beacon *reg_beacon, *btmp; |
fe33eb39 LR |
3176 | |
3177 | cancel_work_sync(®_work); | |
a90c7a31 | 3178 | cancel_delayed_work_sync(®_timeout); |
ad932f04 | 3179 | cancel_delayed_work_sync(®_check_chans); |
fe33eb39 | 3180 | |
9027b149 | 3181 | /* Lock to suppress warnings */ |
38fd2143 | 3182 | rtnl_lock(); |
379b82f4 | 3183 | reset_regdomains(true, NULL); |
38fd2143 | 3184 | rtnl_unlock(); |
734366de | 3185 | |
58ebacc6 | 3186 | dev_set_uevent_suppress(®_pdev->dev, true); |
f6037d09 | 3187 | |
b2e1b302 | 3188 | platform_device_unregister(reg_pdev); |
734366de | 3189 | |
fea9bced JB |
3190 | list_for_each_entry_safe(reg_beacon, btmp, ®_pending_beacons, list) { |
3191 | list_del(®_beacon->list); | |
3192 | kfree(reg_beacon); | |
e38f8a7a | 3193 | } |
e38f8a7a | 3194 | |
fea9bced JB |
3195 | list_for_each_entry_safe(reg_beacon, btmp, ®_beacon_list, list) { |
3196 | list_del(®_beacon->list); | |
3197 | kfree(reg_beacon); | |
e38f8a7a LR |
3198 | } |
3199 | ||
fea9bced JB |
3200 | list_for_each_entry_safe(reg_request, tmp, ®_requests_list, list) { |
3201 | list_del(®_request->list); | |
3202 | kfree(reg_request); | |
fe33eb39 | 3203 | } |
8318d78a | 3204 | } |