Commit | Line | Data |
---|---|---|
8318d78a JB |
1 | /* |
2 | * Copyright 2002-2005, Instant802 Networks, Inc. | |
3 | * Copyright 2005-2006, Devicescape Software, Inc. | |
4 | * Copyright 2007 Johannes Berg <johannes@sipsolutions.net> | |
3b77d5ec | 5 | * Copyright 2008-2011 Luis R. Rodriguez <mcgrof@qca.qualcomm.com> |
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. | |
131 | * (protected by RTNL) | |
132 | */ | |
133 | static bool reg_is_indoor; | |
134 | ||
458f4f9e JB |
135 | static const struct ieee80211_regdomain *get_cfg80211_regdom(void) |
136 | { | |
38fd2143 | 137 | return rtnl_dereference(cfg80211_regdomain); |
458f4f9e JB |
138 | } |
139 | ||
ad30ca2c | 140 | const struct ieee80211_regdomain *get_wiphy_regdom(struct wiphy *wiphy) |
458f4f9e | 141 | { |
38fd2143 | 142 | return rtnl_dereference(wiphy->regd); |
458f4f9e JB |
143 | } |
144 | ||
3ef121b5 LR |
145 | static const char *reg_dfs_region_str(enum nl80211_dfs_regions dfs_region) |
146 | { | |
147 | switch (dfs_region) { | |
148 | case NL80211_DFS_UNSET: | |
149 | return "unset"; | |
150 | case NL80211_DFS_FCC: | |
151 | return "FCC"; | |
152 | case NL80211_DFS_ETSI: | |
153 | return "ETSI"; | |
154 | case NL80211_DFS_JP: | |
155 | return "JP"; | |
156 | } | |
157 | return "Unknown"; | |
158 | } | |
159 | ||
6c474799 LR |
160 | enum nl80211_dfs_regions reg_get_dfs_region(struct wiphy *wiphy) |
161 | { | |
162 | const struct ieee80211_regdomain *regd = NULL; | |
163 | const struct ieee80211_regdomain *wiphy_regd = NULL; | |
164 | ||
165 | regd = get_cfg80211_regdom(); | |
166 | if (!wiphy) | |
167 | goto out; | |
168 | ||
169 | wiphy_regd = get_wiphy_regdom(wiphy); | |
170 | if (!wiphy_regd) | |
171 | goto out; | |
172 | ||
173 | if (wiphy_regd->dfs_region == regd->dfs_region) | |
174 | goto out; | |
175 | ||
176 | REG_DBG_PRINT("%s: device specific dfs_region " | |
177 | "(%s) disagrees with cfg80211's " | |
178 | "central dfs_region (%s)\n", | |
179 | dev_name(&wiphy->dev), | |
180 | reg_dfs_region_str(wiphy_regd->dfs_region), | |
181 | reg_dfs_region_str(regd->dfs_region)); | |
182 | ||
183 | out: | |
184 | return regd->dfs_region; | |
185 | } | |
186 | ||
458f4f9e JB |
187 | static void rcu_free_regdom(const struct ieee80211_regdomain *r) |
188 | { | |
189 | if (!r) | |
190 | return; | |
191 | kfree_rcu((struct ieee80211_regdomain *)r, rcu_head); | |
192 | } | |
193 | ||
c492db37 JB |
194 | static struct regulatory_request *get_last_request(void) |
195 | { | |
38fd2143 | 196 | return rcu_dereference_rtnl(last_request); |
c492db37 JB |
197 | } |
198 | ||
e38f8a7a | 199 | /* Used to queue up regulatory hints */ |
fe33eb39 LR |
200 | static LIST_HEAD(reg_requests_list); |
201 | static spinlock_t reg_requests_lock; | |
202 | ||
e38f8a7a LR |
203 | /* Used to queue up beacon hints for review */ |
204 | static LIST_HEAD(reg_pending_beacons); | |
205 | static spinlock_t reg_pending_beacons_lock; | |
206 | ||
207 | /* Used to keep track of processed beacon hints */ | |
208 | static LIST_HEAD(reg_beacon_list); | |
209 | ||
210 | struct reg_beacon { | |
211 | struct list_head list; | |
212 | struct ieee80211_channel chan; | |
213 | }; | |
214 | ||
ad932f04 AN |
215 | static void reg_check_chans_work(struct work_struct *work); |
216 | static DECLARE_DELAYED_WORK(reg_check_chans, reg_check_chans_work); | |
217 | ||
f333a7a2 LR |
218 | static void reg_todo(struct work_struct *work); |
219 | static DECLARE_WORK(reg_work, reg_todo); | |
220 | ||
a90c7a31 LR |
221 | static void reg_timeout_work(struct work_struct *work); |
222 | static DECLARE_DELAYED_WORK(reg_timeout, reg_timeout_work); | |
223 | ||
734366de JB |
224 | /* We keep a static world regulatory domain in case of the absence of CRDA */ |
225 | static const struct ieee80211_regdomain world_regdom = { | |
90cdc6df | 226 | .n_reg_rules = 6, |
734366de JB |
227 | .alpha2 = "00", |
228 | .reg_rules = { | |
68798a62 LR |
229 | /* IEEE 802.11b/g, channels 1..11 */ |
230 | REG_RULE(2412-10, 2462+10, 40, 6, 20, 0), | |
43c771a1 JB |
231 | /* IEEE 802.11b/g, channels 12..13. */ |
232 | REG_RULE(2467-10, 2472+10, 40, 6, 20, | |
8fe02e16 | 233 | NL80211_RRF_NO_IR), |
611b6a82 LR |
234 | /* IEEE 802.11 channel 14 - Only JP enables |
235 | * this and for 802.11b only */ | |
236 | REG_RULE(2484-10, 2484+10, 20, 6, 20, | |
8fe02e16 | 237 | NL80211_RRF_NO_IR | |
611b6a82 LR |
238 | NL80211_RRF_NO_OFDM), |
239 | /* IEEE 802.11a, channel 36..48 */ | |
131a19bc | 240 | REG_RULE(5180-10, 5240+10, 160, 6, 20, |
8fe02e16 | 241 | NL80211_RRF_NO_IR), |
3fc71f77 | 242 | |
131a19bc JB |
243 | /* IEEE 802.11a, channel 52..64 - DFS required */ |
244 | REG_RULE(5260-10, 5320+10, 160, 6, 20, | |
8fe02e16 | 245 | NL80211_RRF_NO_IR | |
131a19bc JB |
246 | NL80211_RRF_DFS), |
247 | ||
248 | /* IEEE 802.11a, channel 100..144 - DFS required */ | |
249 | REG_RULE(5500-10, 5720+10, 160, 6, 20, | |
8fe02e16 | 250 | NL80211_RRF_NO_IR | |
131a19bc | 251 | NL80211_RRF_DFS), |
3fc71f77 LR |
252 | |
253 | /* IEEE 802.11a, channel 149..165 */ | |
8ab9d85c | 254 | REG_RULE(5745-10, 5825+10, 80, 6, 20, |
8fe02e16 | 255 | NL80211_RRF_NO_IR), |
90cdc6df VK |
256 | |
257 | /* IEEE 802.11ad (60gHz), channels 1..3 */ | |
258 | REG_RULE(56160+2160*1-1080, 56160+2160*3+1080, 2160, 0, 0, 0), | |
734366de JB |
259 | } |
260 | }; | |
261 | ||
38fd2143 | 262 | /* protected by RTNL */ |
a3d2eaf0 JB |
263 | static const struct ieee80211_regdomain *cfg80211_world_regdom = |
264 | &world_regdom; | |
734366de | 265 | |
6ee7d330 | 266 | static char *ieee80211_regdom = "00"; |
09d989d1 | 267 | static char user_alpha2[2]; |
6ee7d330 | 268 | |
734366de JB |
269 | module_param(ieee80211_regdom, charp, 0444); |
270 | MODULE_PARM_DESC(ieee80211_regdom, "IEEE 802.11 regulatory domain code"); | |
271 | ||
c888393b | 272 | static void reg_free_request(struct regulatory_request *request) |
5ad6ef5e | 273 | { |
c888393b AN |
274 | if (request != get_last_request()) |
275 | kfree(request); | |
276 | } | |
277 | ||
278 | static void reg_free_last_request(void) | |
279 | { | |
280 | struct regulatory_request *lr = get_last_request(); | |
281 | ||
5ad6ef5e LR |
282 | if (lr != &core_request_world && lr) |
283 | kfree_rcu(lr, rcu_head); | |
284 | } | |
285 | ||
05f1a3ea LR |
286 | static void reg_update_last_request(struct regulatory_request *request) |
287 | { | |
255e25b0 LR |
288 | struct regulatory_request *lr; |
289 | ||
290 | lr = get_last_request(); | |
291 | if (lr == request) | |
292 | return; | |
293 | ||
c888393b | 294 | reg_free_last_request(); |
05f1a3ea LR |
295 | rcu_assign_pointer(last_request, request); |
296 | } | |
297 | ||
379b82f4 JB |
298 | static void reset_regdomains(bool full_reset, |
299 | const struct ieee80211_regdomain *new_regdom) | |
734366de | 300 | { |
458f4f9e JB |
301 | const struct ieee80211_regdomain *r; |
302 | ||
38fd2143 | 303 | ASSERT_RTNL(); |
e8da2bb4 | 304 | |
458f4f9e JB |
305 | r = get_cfg80211_regdom(); |
306 | ||
942b25cf | 307 | /* avoid freeing static information or freeing something twice */ |
458f4f9e JB |
308 | if (r == cfg80211_world_regdom) |
309 | r = NULL; | |
942b25cf JB |
310 | if (cfg80211_world_regdom == &world_regdom) |
311 | cfg80211_world_regdom = NULL; | |
458f4f9e JB |
312 | if (r == &world_regdom) |
313 | r = NULL; | |
942b25cf | 314 | |
458f4f9e JB |
315 | rcu_free_regdom(r); |
316 | rcu_free_regdom(cfg80211_world_regdom); | |
734366de | 317 | |
a3d2eaf0 | 318 | cfg80211_world_regdom = &world_regdom; |
458f4f9e | 319 | rcu_assign_pointer(cfg80211_regdomain, new_regdom); |
a042994d LR |
320 | |
321 | if (!full_reset) | |
322 | return; | |
323 | ||
05f1a3ea | 324 | reg_update_last_request(&core_request_world); |
734366de JB |
325 | } |
326 | ||
fb1fc7ad LR |
327 | /* |
328 | * Dynamic world regulatory domain requested by the wireless | |
329 | * core upon initialization | |
330 | */ | |
a3d2eaf0 | 331 | static void update_world_regdomain(const struct ieee80211_regdomain *rd) |
734366de | 332 | { |
c492db37 | 333 | struct regulatory_request *lr; |
734366de | 334 | |
c492db37 JB |
335 | lr = get_last_request(); |
336 | ||
337 | WARN_ON(!lr); | |
734366de | 338 | |
379b82f4 | 339 | reset_regdomains(false, rd); |
734366de JB |
340 | |
341 | cfg80211_world_regdom = rd; | |
734366de | 342 | } |
734366de | 343 | |
a3d2eaf0 | 344 | bool is_world_regdom(const char *alpha2) |
b2e1b302 LR |
345 | { |
346 | if (!alpha2) | |
347 | return false; | |
1a919318 | 348 | return alpha2[0] == '0' && alpha2[1] == '0'; |
b2e1b302 | 349 | } |
8318d78a | 350 | |
a3d2eaf0 | 351 | static bool is_alpha2_set(const char *alpha2) |
b2e1b302 LR |
352 | { |
353 | if (!alpha2) | |
354 | return false; | |
1a919318 | 355 | return alpha2[0] && alpha2[1]; |
b2e1b302 | 356 | } |
8318d78a | 357 | |
a3d2eaf0 | 358 | static bool is_unknown_alpha2(const char *alpha2) |
b2e1b302 LR |
359 | { |
360 | if (!alpha2) | |
361 | return false; | |
fb1fc7ad LR |
362 | /* |
363 | * Special case where regulatory domain was built by driver | |
364 | * but a specific alpha2 cannot be determined | |
365 | */ | |
1a919318 | 366 | return alpha2[0] == '9' && alpha2[1] == '9'; |
b2e1b302 | 367 | } |
8318d78a | 368 | |
3f2355cb LR |
369 | static bool is_intersected_alpha2(const char *alpha2) |
370 | { | |
371 | if (!alpha2) | |
372 | return false; | |
fb1fc7ad LR |
373 | /* |
374 | * Special case where regulatory domain is the | |
3f2355cb | 375 | * result of an intersection between two regulatory domain |
fb1fc7ad LR |
376 | * structures |
377 | */ | |
1a919318 | 378 | return alpha2[0] == '9' && alpha2[1] == '8'; |
3f2355cb LR |
379 | } |
380 | ||
a3d2eaf0 | 381 | static bool is_an_alpha2(const char *alpha2) |
b2e1b302 LR |
382 | { |
383 | if (!alpha2) | |
384 | return false; | |
1a919318 | 385 | return isalpha(alpha2[0]) && isalpha(alpha2[1]); |
b2e1b302 | 386 | } |
8318d78a | 387 | |
a3d2eaf0 | 388 | static bool alpha2_equal(const char *alpha2_x, const char *alpha2_y) |
b2e1b302 LR |
389 | { |
390 | if (!alpha2_x || !alpha2_y) | |
391 | return false; | |
1a919318 | 392 | return alpha2_x[0] == alpha2_y[0] && alpha2_x[1] == alpha2_y[1]; |
b2e1b302 LR |
393 | } |
394 | ||
69b1572b | 395 | static bool regdom_changes(const char *alpha2) |
b2e1b302 | 396 | { |
458f4f9e | 397 | const struct ieee80211_regdomain *r = get_cfg80211_regdom(); |
761cf7ec | 398 | |
458f4f9e | 399 | if (!r) |
b2e1b302 | 400 | return true; |
458f4f9e | 401 | return !alpha2_equal(r->alpha2, alpha2); |
b2e1b302 LR |
402 | } |
403 | ||
09d989d1 LR |
404 | /* |
405 | * The NL80211_REGDOM_SET_BY_USER regdom alpha2 is cached, this lets | |
406 | * you know if a valid regulatory hint with NL80211_REGDOM_SET_BY_USER | |
407 | * has ever been issued. | |
408 | */ | |
409 | static bool is_user_regdom_saved(void) | |
410 | { | |
411 | if (user_alpha2[0] == '9' && user_alpha2[1] == '7') | |
412 | return false; | |
413 | ||
414 | /* This would indicate a mistake on the design */ | |
1a919318 | 415 | if (WARN(!is_world_regdom(user_alpha2) && !is_an_alpha2(user_alpha2), |
09d989d1 | 416 | "Unexpected user alpha2: %c%c\n", |
1a919318 | 417 | user_alpha2[0], user_alpha2[1])) |
09d989d1 LR |
418 | return false; |
419 | ||
420 | return true; | |
421 | } | |
422 | ||
e9763c3c JB |
423 | static const struct ieee80211_regdomain * |
424 | reg_copy_regd(const struct ieee80211_regdomain *src_regd) | |
3b377ea9 JL |
425 | { |
426 | struct ieee80211_regdomain *regd; | |
e9763c3c | 427 | int size_of_regd; |
3b377ea9 JL |
428 | unsigned int i; |
429 | ||
82f20856 JB |
430 | size_of_regd = |
431 | sizeof(struct ieee80211_regdomain) + | |
432 | src_regd->n_reg_rules * sizeof(struct ieee80211_reg_rule); | |
3b377ea9 JL |
433 | |
434 | regd = kzalloc(size_of_regd, GFP_KERNEL); | |
435 | if (!regd) | |
e9763c3c | 436 | return ERR_PTR(-ENOMEM); |
3b377ea9 JL |
437 | |
438 | memcpy(regd, src_regd, sizeof(struct ieee80211_regdomain)); | |
439 | ||
440 | for (i = 0; i < src_regd->n_reg_rules; i++) | |
441 | memcpy(®d->reg_rules[i], &src_regd->reg_rules[i], | |
e9763c3c | 442 | sizeof(struct ieee80211_reg_rule)); |
3b377ea9 | 443 | |
e9763c3c | 444 | return regd; |
3b377ea9 JL |
445 | } |
446 | ||
447 | #ifdef CONFIG_CFG80211_INTERNAL_REGDB | |
448 | struct reg_regdb_search_request { | |
449 | char alpha2[2]; | |
450 | struct list_head list; | |
451 | }; | |
452 | ||
453 | static LIST_HEAD(reg_regdb_search_list); | |
368d06f5 | 454 | static DEFINE_MUTEX(reg_regdb_search_mutex); |
3b377ea9 JL |
455 | |
456 | static void reg_regdb_search(struct work_struct *work) | |
457 | { | |
458 | struct reg_regdb_search_request *request; | |
e9763c3c JB |
459 | const struct ieee80211_regdomain *curdom, *regdom = NULL; |
460 | int i; | |
a85d0d7f | 461 | |
5fe231e8 | 462 | rtnl_lock(); |
3b377ea9 | 463 | |
368d06f5 | 464 | mutex_lock(®_regdb_search_mutex); |
3b377ea9 JL |
465 | while (!list_empty(®_regdb_search_list)) { |
466 | request = list_first_entry(®_regdb_search_list, | |
467 | struct reg_regdb_search_request, | |
468 | list); | |
469 | list_del(&request->list); | |
470 | ||
1a919318 | 471 | for (i = 0; i < reg_regdb_size; i++) { |
3b377ea9 JL |
472 | curdom = reg_regdb[i]; |
473 | ||
1a919318 | 474 | if (alpha2_equal(request->alpha2, curdom->alpha2)) { |
e9763c3c | 475 | regdom = reg_copy_regd(curdom); |
3b377ea9 JL |
476 | break; |
477 | } | |
478 | } | |
479 | ||
480 | kfree(request); | |
481 | } | |
368d06f5 | 482 | mutex_unlock(®_regdb_search_mutex); |
a85d0d7f | 483 | |
e9763c3c | 484 | if (!IS_ERR_OR_NULL(regdom)) |
a85d0d7f LR |
485 | set_regdom(regdom); |
486 | ||
5fe231e8 | 487 | rtnl_unlock(); |
3b377ea9 JL |
488 | } |
489 | ||
490 | static DECLARE_WORK(reg_regdb_work, reg_regdb_search); | |
491 | ||
492 | static void reg_regdb_query(const char *alpha2) | |
493 | { | |
494 | struct reg_regdb_search_request *request; | |
495 | ||
496 | if (!alpha2) | |
497 | return; | |
498 | ||
499 | request = kzalloc(sizeof(struct reg_regdb_search_request), GFP_KERNEL); | |
500 | if (!request) | |
501 | return; | |
502 | ||
503 | memcpy(request->alpha2, alpha2, 2); | |
504 | ||
368d06f5 | 505 | mutex_lock(®_regdb_search_mutex); |
3b377ea9 | 506 | list_add_tail(&request->list, ®_regdb_search_list); |
368d06f5 | 507 | mutex_unlock(®_regdb_search_mutex); |
3b377ea9 JL |
508 | |
509 | schedule_work(®_regdb_work); | |
510 | } | |
80007efe LR |
511 | |
512 | /* Feel free to add any other sanity checks here */ | |
513 | static void reg_regdb_size_check(void) | |
514 | { | |
515 | /* We should ideally BUILD_BUG_ON() but then random builds would fail */ | |
516 | WARN_ONCE(!reg_regdb_size, "db.txt is empty, you should update it..."); | |
517 | } | |
3b377ea9 | 518 | #else |
80007efe | 519 | static inline void reg_regdb_size_check(void) {} |
3b377ea9 JL |
520 | static inline void reg_regdb_query(const char *alpha2) {} |
521 | #endif /* CONFIG_CFG80211_INTERNAL_REGDB */ | |
522 | ||
fb1fc7ad LR |
523 | /* |
524 | * This lets us keep regulatory code which is updated on a regulatory | |
1226d258 | 525 | * basis in userspace. |
fb1fc7ad | 526 | */ |
b2e1b302 LR |
527 | static int call_crda(const char *alpha2) |
528 | { | |
1226d258 JB |
529 | char country[12]; |
530 | char *env[] = { country, NULL }; | |
531 | ||
532 | snprintf(country, sizeof(country), "COUNTRY=%c%c", | |
533 | alpha2[0], alpha2[1]); | |
534 | ||
b2e1b302 | 535 | if (!is_world_regdom((char *) alpha2)) |
e9c0268f | 536 | pr_info("Calling CRDA for country: %c%c\n", |
b2e1b302 LR |
537 | alpha2[0], alpha2[1]); |
538 | else | |
e9c0268f | 539 | pr_info("Calling CRDA to update world regulatory domain\n"); |
b2e1b302 | 540 | |
3b377ea9 JL |
541 | /* query internal regulatory database (if it exists) */ |
542 | reg_regdb_query(alpha2); | |
543 | ||
1226d258 | 544 | return kobject_uevent_env(®_pdev->dev.kobj, KOBJ_CHANGE, env); |
b2e1b302 LR |
545 | } |
546 | ||
fe6631ff LR |
547 | static enum reg_request_treatment |
548 | reg_call_crda(struct regulatory_request *request) | |
549 | { | |
550 | if (call_crda(request->alpha2)) | |
551 | return REG_REQ_IGNORE; | |
552 | return REG_REQ_OK; | |
553 | } | |
554 | ||
e438768f | 555 | bool reg_is_valid_request(const char *alpha2) |
b2e1b302 | 556 | { |
c492db37 | 557 | struct regulatory_request *lr = get_last_request(); |
61405e97 | 558 | |
c492db37 | 559 | if (!lr || lr->processed) |
f6037d09 JB |
560 | return false; |
561 | ||
c492db37 | 562 | return alpha2_equal(lr->alpha2, alpha2); |
b2e1b302 | 563 | } |
8318d78a | 564 | |
e3961af1 JD |
565 | static const struct ieee80211_regdomain *reg_get_regdomain(struct wiphy *wiphy) |
566 | { | |
567 | struct regulatory_request *lr = get_last_request(); | |
568 | ||
569 | /* | |
570 | * Follow the driver's regulatory domain, if present, unless a country | |
571 | * IE has been processed or a user wants to help complaince further | |
572 | */ | |
573 | if (lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && | |
574 | lr->initiator != NL80211_REGDOM_SET_BY_USER && | |
575 | wiphy->regd) | |
576 | return get_wiphy_regdom(wiphy); | |
577 | ||
578 | return get_cfg80211_regdom(); | |
579 | } | |
580 | ||
a6d4a534 AN |
581 | static unsigned int |
582 | reg_get_max_bandwidth_from_range(const struct ieee80211_regdomain *rd, | |
583 | const struct ieee80211_reg_rule *rule) | |
97524820 JD |
584 | { |
585 | const struct ieee80211_freq_range *freq_range = &rule->freq_range; | |
586 | const struct ieee80211_freq_range *freq_range_tmp; | |
587 | const struct ieee80211_reg_rule *tmp; | |
588 | u32 start_freq, end_freq, idx, no; | |
589 | ||
590 | for (idx = 0; idx < rd->n_reg_rules; idx++) | |
591 | if (rule == &rd->reg_rules[idx]) | |
592 | break; | |
593 | ||
594 | if (idx == rd->n_reg_rules) | |
595 | return 0; | |
596 | ||
597 | /* get start_freq */ | |
598 | no = idx; | |
599 | ||
600 | while (no) { | |
601 | tmp = &rd->reg_rules[--no]; | |
602 | freq_range_tmp = &tmp->freq_range; | |
603 | ||
604 | if (freq_range_tmp->end_freq_khz < freq_range->start_freq_khz) | |
605 | break; | |
606 | ||
97524820 JD |
607 | freq_range = freq_range_tmp; |
608 | } | |
609 | ||
610 | start_freq = freq_range->start_freq_khz; | |
611 | ||
612 | /* get end_freq */ | |
613 | freq_range = &rule->freq_range; | |
614 | no = idx; | |
615 | ||
616 | while (no < rd->n_reg_rules - 1) { | |
617 | tmp = &rd->reg_rules[++no]; | |
618 | freq_range_tmp = &tmp->freq_range; | |
619 | ||
620 | if (freq_range_tmp->start_freq_khz > freq_range->end_freq_khz) | |
621 | break; | |
622 | ||
97524820 JD |
623 | freq_range = freq_range_tmp; |
624 | } | |
625 | ||
626 | end_freq = freq_range->end_freq_khz; | |
627 | ||
628 | return end_freq - start_freq; | |
629 | } | |
630 | ||
a6d4a534 AN |
631 | unsigned int reg_get_max_bandwidth(const struct ieee80211_regdomain *rd, |
632 | const struct ieee80211_reg_rule *rule) | |
633 | { | |
634 | unsigned int bw = reg_get_max_bandwidth_from_range(rd, rule); | |
635 | ||
636 | if (rule->flags & NL80211_RRF_NO_160MHZ) | |
637 | bw = min_t(unsigned int, bw, MHZ_TO_KHZ(80)); | |
638 | if (rule->flags & NL80211_RRF_NO_80MHZ) | |
639 | bw = min_t(unsigned int, bw, MHZ_TO_KHZ(40)); | |
640 | ||
641 | /* | |
642 | * HT40+/HT40- limits are handled per-channel. Only limit BW if both | |
643 | * are not allowed. | |
644 | */ | |
645 | if (rule->flags & NL80211_RRF_NO_HT40MINUS && | |
646 | rule->flags & NL80211_RRF_NO_HT40PLUS) | |
647 | bw = min_t(unsigned int, bw, MHZ_TO_KHZ(20)); | |
648 | ||
649 | return bw; | |
650 | } | |
651 | ||
b2e1b302 | 652 | /* Sanity check on a regulatory rule */ |
a3d2eaf0 | 653 | static bool is_valid_reg_rule(const struct ieee80211_reg_rule *rule) |
8318d78a | 654 | { |
a3d2eaf0 | 655 | const struct ieee80211_freq_range *freq_range = &rule->freq_range; |
b2e1b302 LR |
656 | u32 freq_diff; |
657 | ||
91e99004 | 658 | if (freq_range->start_freq_khz <= 0 || freq_range->end_freq_khz <= 0) |
b2e1b302 LR |
659 | return false; |
660 | ||
661 | if (freq_range->start_freq_khz > freq_range->end_freq_khz) | |
662 | return false; | |
663 | ||
664 | freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz; | |
665 | ||
bd05f28e | 666 | if (freq_range->end_freq_khz <= freq_range->start_freq_khz || |
1a919318 | 667 | freq_range->max_bandwidth_khz > freq_diff) |
b2e1b302 LR |
668 | return false; |
669 | ||
670 | return true; | |
671 | } | |
672 | ||
a3d2eaf0 | 673 | static bool is_valid_rd(const struct ieee80211_regdomain *rd) |
b2e1b302 | 674 | { |
a3d2eaf0 | 675 | const struct ieee80211_reg_rule *reg_rule = NULL; |
b2e1b302 | 676 | unsigned int i; |
8318d78a | 677 | |
b2e1b302 LR |
678 | if (!rd->n_reg_rules) |
679 | return false; | |
8318d78a | 680 | |
88dc1c3f LR |
681 | if (WARN_ON(rd->n_reg_rules > NL80211_MAX_SUPP_REG_RULES)) |
682 | return false; | |
683 | ||
b2e1b302 LR |
684 | for (i = 0; i < rd->n_reg_rules; i++) { |
685 | reg_rule = &rd->reg_rules[i]; | |
686 | if (!is_valid_reg_rule(reg_rule)) | |
687 | return false; | |
688 | } | |
689 | ||
690 | return true; | |
8318d78a JB |
691 | } |
692 | ||
038659e7 | 693 | static bool reg_does_bw_fit(const struct ieee80211_freq_range *freq_range, |
fe7ef5e9 | 694 | u32 center_freq_khz, u32 bw_khz) |
b2e1b302 | 695 | { |
038659e7 LR |
696 | u32 start_freq_khz, end_freq_khz; |
697 | ||
698 | start_freq_khz = center_freq_khz - (bw_khz/2); | |
699 | end_freq_khz = center_freq_khz + (bw_khz/2); | |
700 | ||
701 | if (start_freq_khz >= freq_range->start_freq_khz && | |
702 | end_freq_khz <= freq_range->end_freq_khz) | |
703 | return true; | |
704 | ||
705 | return false; | |
b2e1b302 | 706 | } |
8318d78a | 707 | |
0c7dc45d LR |
708 | /** |
709 | * freq_in_rule_band - tells us if a frequency is in a frequency band | |
710 | * @freq_range: frequency rule we want to query | |
711 | * @freq_khz: frequency we are inquiring about | |
712 | * | |
713 | * This lets us know if a specific frequency rule is or is not relevant to | |
714 | * a specific frequency's band. Bands are device specific and artificial | |
64629b9d VK |
715 | * definitions (the "2.4 GHz band", the "5 GHz band" and the "60GHz band"), |
716 | * however it is safe for now to assume that a frequency rule should not be | |
717 | * part of a frequency's band if the start freq or end freq are off by more | |
718 | * than 2 GHz for the 2.4 and 5 GHz bands, and by more than 10 GHz for the | |
719 | * 60 GHz band. | |
0c7dc45d LR |
720 | * This resolution can be lowered and should be considered as we add |
721 | * regulatory rule support for other "bands". | |
722 | **/ | |
723 | static bool freq_in_rule_band(const struct ieee80211_freq_range *freq_range, | |
1a919318 | 724 | u32 freq_khz) |
0c7dc45d LR |
725 | { |
726 | #define ONE_GHZ_IN_KHZ 1000000 | |
64629b9d VK |
727 | /* |
728 | * From 802.11ad: directional multi-gigabit (DMG): | |
729 | * Pertaining to operation in a frequency band containing a channel | |
730 | * with the Channel starting frequency above 45 GHz. | |
731 | */ | |
732 | u32 limit = freq_khz > 45 * ONE_GHZ_IN_KHZ ? | |
733 | 10 * ONE_GHZ_IN_KHZ : 2 * ONE_GHZ_IN_KHZ; | |
734 | if (abs(freq_khz - freq_range->start_freq_khz) <= limit) | |
0c7dc45d | 735 | return true; |
64629b9d | 736 | if (abs(freq_khz - freq_range->end_freq_khz) <= limit) |
0c7dc45d LR |
737 | return true; |
738 | return false; | |
739 | #undef ONE_GHZ_IN_KHZ | |
740 | } | |
741 | ||
adbfb058 LR |
742 | /* |
743 | * Later on we can perhaps use the more restrictive DFS | |
744 | * region but we don't have information for that yet so | |
745 | * for now simply disallow conflicts. | |
746 | */ | |
747 | static enum nl80211_dfs_regions | |
748 | reg_intersect_dfs_region(const enum nl80211_dfs_regions dfs_region1, | |
749 | const enum nl80211_dfs_regions dfs_region2) | |
750 | { | |
751 | if (dfs_region1 != dfs_region2) | |
752 | return NL80211_DFS_UNSET; | |
753 | return dfs_region1; | |
754 | } | |
755 | ||
fb1fc7ad LR |
756 | /* |
757 | * Helper for regdom_intersect(), this does the real | |
758 | * mathematical intersection fun | |
759 | */ | |
97524820 JD |
760 | static int reg_rules_intersect(const struct ieee80211_regdomain *rd1, |
761 | const struct ieee80211_regdomain *rd2, | |
762 | const struct ieee80211_reg_rule *rule1, | |
1a919318 JB |
763 | const struct ieee80211_reg_rule *rule2, |
764 | struct ieee80211_reg_rule *intersected_rule) | |
9c96477d LR |
765 | { |
766 | const struct ieee80211_freq_range *freq_range1, *freq_range2; | |
767 | struct ieee80211_freq_range *freq_range; | |
768 | const struct ieee80211_power_rule *power_rule1, *power_rule2; | |
769 | struct ieee80211_power_rule *power_rule; | |
97524820 | 770 | u32 freq_diff, max_bandwidth1, max_bandwidth2; |
9c96477d LR |
771 | |
772 | freq_range1 = &rule1->freq_range; | |
773 | freq_range2 = &rule2->freq_range; | |
774 | freq_range = &intersected_rule->freq_range; | |
775 | ||
776 | power_rule1 = &rule1->power_rule; | |
777 | power_rule2 = &rule2->power_rule; | |
778 | power_rule = &intersected_rule->power_rule; | |
779 | ||
780 | freq_range->start_freq_khz = max(freq_range1->start_freq_khz, | |
1a919318 | 781 | freq_range2->start_freq_khz); |
9c96477d | 782 | freq_range->end_freq_khz = min(freq_range1->end_freq_khz, |
1a919318 | 783 | freq_range2->end_freq_khz); |
97524820 JD |
784 | |
785 | max_bandwidth1 = freq_range1->max_bandwidth_khz; | |
786 | max_bandwidth2 = freq_range2->max_bandwidth_khz; | |
787 | ||
b0dfd2ea JD |
788 | if (rule1->flags & NL80211_RRF_AUTO_BW) |
789 | max_bandwidth1 = reg_get_max_bandwidth(rd1, rule1); | |
790 | if (rule2->flags & NL80211_RRF_AUTO_BW) | |
791 | max_bandwidth2 = reg_get_max_bandwidth(rd2, rule2); | |
97524820 JD |
792 | |
793 | freq_range->max_bandwidth_khz = min(max_bandwidth1, max_bandwidth2); | |
9c96477d | 794 | |
b0dfd2ea JD |
795 | intersected_rule->flags = rule1->flags | rule2->flags; |
796 | ||
797 | /* | |
798 | * In case NL80211_RRF_AUTO_BW requested for both rules | |
799 | * set AUTO_BW in intersected rule also. Next we will | |
800 | * calculate BW correctly in handle_channel function. | |
801 | * In other case remove AUTO_BW flag while we calculate | |
802 | * maximum bandwidth correctly and auto calculation is | |
803 | * not required. | |
804 | */ | |
805 | if ((rule1->flags & NL80211_RRF_AUTO_BW) && | |
806 | (rule2->flags & NL80211_RRF_AUTO_BW)) | |
807 | intersected_rule->flags |= NL80211_RRF_AUTO_BW; | |
808 | else | |
809 | intersected_rule->flags &= ~NL80211_RRF_AUTO_BW; | |
810 | ||
9c96477d LR |
811 | freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz; |
812 | if (freq_range->max_bandwidth_khz > freq_diff) | |
813 | freq_range->max_bandwidth_khz = freq_diff; | |
814 | ||
815 | power_rule->max_eirp = min(power_rule1->max_eirp, | |
816 | power_rule2->max_eirp); | |
817 | power_rule->max_antenna_gain = min(power_rule1->max_antenna_gain, | |
818 | power_rule2->max_antenna_gain); | |
819 | ||
089027e5 JD |
820 | intersected_rule->dfs_cac_ms = max(rule1->dfs_cac_ms, |
821 | rule2->dfs_cac_ms); | |
822 | ||
9c96477d LR |
823 | if (!is_valid_reg_rule(intersected_rule)) |
824 | return -EINVAL; | |
825 | ||
826 | return 0; | |
827 | } | |
828 | ||
a62a1aed EP |
829 | /* check whether old rule contains new rule */ |
830 | static bool rule_contains(struct ieee80211_reg_rule *r1, | |
831 | struct ieee80211_reg_rule *r2) | |
832 | { | |
833 | /* for simplicity, currently consider only same flags */ | |
834 | if (r1->flags != r2->flags) | |
835 | return false; | |
836 | ||
837 | /* verify r1 is more restrictive */ | |
838 | if ((r1->power_rule.max_antenna_gain > | |
839 | r2->power_rule.max_antenna_gain) || | |
840 | r1->power_rule.max_eirp > r2->power_rule.max_eirp) | |
841 | return false; | |
842 | ||
843 | /* make sure r2's range is contained within r1 */ | |
844 | if (r1->freq_range.start_freq_khz > r2->freq_range.start_freq_khz || | |
845 | r1->freq_range.end_freq_khz < r2->freq_range.end_freq_khz) | |
846 | return false; | |
847 | ||
848 | /* and finally verify that r1.max_bw >= r2.max_bw */ | |
849 | if (r1->freq_range.max_bandwidth_khz < | |
850 | r2->freq_range.max_bandwidth_khz) | |
851 | return false; | |
852 | ||
853 | return true; | |
854 | } | |
855 | ||
856 | /* add or extend current rules. do nothing if rule is already contained */ | |
857 | static void add_rule(struct ieee80211_reg_rule *rule, | |
858 | struct ieee80211_reg_rule *reg_rules, u32 *n_rules) | |
859 | { | |
860 | struct ieee80211_reg_rule *tmp_rule; | |
861 | int i; | |
862 | ||
863 | for (i = 0; i < *n_rules; i++) { | |
864 | tmp_rule = ®_rules[i]; | |
865 | /* rule is already contained - do nothing */ | |
866 | if (rule_contains(tmp_rule, rule)) | |
867 | return; | |
868 | ||
869 | /* extend rule if possible */ | |
870 | if (rule_contains(rule, tmp_rule)) { | |
871 | memcpy(tmp_rule, rule, sizeof(*rule)); | |
872 | return; | |
873 | } | |
874 | } | |
875 | ||
876 | memcpy(®_rules[*n_rules], rule, sizeof(*rule)); | |
877 | (*n_rules)++; | |
878 | } | |
879 | ||
9c96477d LR |
880 | /** |
881 | * regdom_intersect - do the intersection between two regulatory domains | |
882 | * @rd1: first regulatory domain | |
883 | * @rd2: second regulatory domain | |
884 | * | |
885 | * Use this function to get the intersection between two regulatory domains. | |
886 | * Once completed we will mark the alpha2 for the rd as intersected, "98", | |
887 | * as no one single alpha2 can represent this regulatory domain. | |
888 | * | |
889 | * Returns a pointer to the regulatory domain structure which will hold the | |
890 | * resulting intersection of rules between rd1 and rd2. We will | |
891 | * kzalloc() this structure for you. | |
892 | */ | |
1a919318 JB |
893 | static struct ieee80211_regdomain * |
894 | regdom_intersect(const struct ieee80211_regdomain *rd1, | |
895 | const struct ieee80211_regdomain *rd2) | |
9c96477d LR |
896 | { |
897 | int r, size_of_regd; | |
898 | unsigned int x, y; | |
a62a1aed | 899 | unsigned int num_rules = 0; |
9c96477d | 900 | const struct ieee80211_reg_rule *rule1, *rule2; |
a62a1aed | 901 | struct ieee80211_reg_rule intersected_rule; |
9c96477d | 902 | struct ieee80211_regdomain *rd; |
9c96477d LR |
903 | |
904 | if (!rd1 || !rd2) | |
905 | return NULL; | |
906 | ||
fb1fc7ad LR |
907 | /* |
908 | * First we get a count of the rules we'll need, then we actually | |
9c96477d LR |
909 | * build them. This is to so we can malloc() and free() a |
910 | * regdomain once. The reason we use reg_rules_intersect() here | |
911 | * is it will return -EINVAL if the rule computed makes no sense. | |
fb1fc7ad LR |
912 | * All rules that do check out OK are valid. |
913 | */ | |
9c96477d LR |
914 | |
915 | for (x = 0; x < rd1->n_reg_rules; x++) { | |
916 | rule1 = &rd1->reg_rules[x]; | |
917 | for (y = 0; y < rd2->n_reg_rules; y++) { | |
918 | rule2 = &rd2->reg_rules[y]; | |
97524820 | 919 | if (!reg_rules_intersect(rd1, rd2, rule1, rule2, |
a62a1aed | 920 | &intersected_rule)) |
9c96477d | 921 | num_rules++; |
9c96477d LR |
922 | } |
923 | } | |
924 | ||
925 | if (!num_rules) | |
926 | return NULL; | |
927 | ||
928 | size_of_regd = sizeof(struct ieee80211_regdomain) + | |
82f20856 | 929 | num_rules * sizeof(struct ieee80211_reg_rule); |
9c96477d LR |
930 | |
931 | rd = kzalloc(size_of_regd, GFP_KERNEL); | |
932 | if (!rd) | |
933 | return NULL; | |
934 | ||
a62a1aed | 935 | for (x = 0; x < rd1->n_reg_rules; x++) { |
9c96477d | 936 | rule1 = &rd1->reg_rules[x]; |
a62a1aed | 937 | for (y = 0; y < rd2->n_reg_rules; y++) { |
9c96477d | 938 | rule2 = &rd2->reg_rules[y]; |
97524820 | 939 | r = reg_rules_intersect(rd1, rd2, rule1, rule2, |
a62a1aed | 940 | &intersected_rule); |
fb1fc7ad LR |
941 | /* |
942 | * No need to memset here the intersected rule here as | |
943 | * we're not using the stack anymore | |
944 | */ | |
9c96477d LR |
945 | if (r) |
946 | continue; | |
9c96477d | 947 | |
a62a1aed EP |
948 | add_rule(&intersected_rule, rd->reg_rules, |
949 | &rd->n_reg_rules); | |
950 | } | |
9c96477d LR |
951 | } |
952 | ||
9c96477d LR |
953 | rd->alpha2[0] = '9'; |
954 | rd->alpha2[1] = '8'; | |
adbfb058 LR |
955 | rd->dfs_region = reg_intersect_dfs_region(rd1->dfs_region, |
956 | rd2->dfs_region); | |
9c96477d LR |
957 | |
958 | return rd; | |
959 | } | |
960 | ||
fb1fc7ad LR |
961 | /* |
962 | * XXX: add support for the rest of enum nl80211_reg_rule_flags, we may | |
963 | * want to just have the channel structure use these | |
964 | */ | |
b2e1b302 LR |
965 | static u32 map_regdom_flags(u32 rd_flags) |
966 | { | |
967 | u32 channel_flags = 0; | |
8fe02e16 LR |
968 | if (rd_flags & NL80211_RRF_NO_IR_ALL) |
969 | channel_flags |= IEEE80211_CHAN_NO_IR; | |
b2e1b302 LR |
970 | if (rd_flags & NL80211_RRF_DFS) |
971 | channel_flags |= IEEE80211_CHAN_RADAR; | |
03f6b084 SF |
972 | if (rd_flags & NL80211_RRF_NO_OFDM) |
973 | channel_flags |= IEEE80211_CHAN_NO_OFDM; | |
570dbde1 DS |
974 | if (rd_flags & NL80211_RRF_NO_OUTDOOR) |
975 | channel_flags |= IEEE80211_CHAN_INDOOR_ONLY; | |
a6d4a534 AN |
976 | if (rd_flags & NL80211_RRF_GO_CONCURRENT) |
977 | channel_flags |= IEEE80211_CHAN_GO_CONCURRENT; | |
978 | if (rd_flags & NL80211_RRF_NO_HT40MINUS) | |
979 | channel_flags |= IEEE80211_CHAN_NO_HT40MINUS; | |
980 | if (rd_flags & NL80211_RRF_NO_HT40PLUS) | |
981 | channel_flags |= IEEE80211_CHAN_NO_HT40PLUS; | |
982 | if (rd_flags & NL80211_RRF_NO_80MHZ) | |
983 | channel_flags |= IEEE80211_CHAN_NO_80MHZ; | |
984 | if (rd_flags & NL80211_RRF_NO_160MHZ) | |
985 | channel_flags |= IEEE80211_CHAN_NO_160MHZ; | |
b2e1b302 LR |
986 | return channel_flags; |
987 | } | |
988 | ||
361c9c8b JB |
989 | static const struct ieee80211_reg_rule * |
990 | freq_reg_info_regd(struct wiphy *wiphy, u32 center_freq, | |
991 | const struct ieee80211_regdomain *regd) | |
8318d78a JB |
992 | { |
993 | int i; | |
0c7dc45d | 994 | bool band_rule_found = false; |
038659e7 LR |
995 | bool bw_fits = false; |
996 | ||
3e0c3ff3 | 997 | if (!regd) |
361c9c8b | 998 | return ERR_PTR(-EINVAL); |
b2e1b302 | 999 | |
3e0c3ff3 | 1000 | for (i = 0; i < regd->n_reg_rules; i++) { |
b2e1b302 LR |
1001 | const struct ieee80211_reg_rule *rr; |
1002 | const struct ieee80211_freq_range *fr = NULL; | |
b2e1b302 | 1003 | |
3e0c3ff3 | 1004 | rr = ®d->reg_rules[i]; |
b2e1b302 | 1005 | fr = &rr->freq_range; |
0c7dc45d | 1006 | |
fb1fc7ad LR |
1007 | /* |
1008 | * We only need to know if one frequency rule was | |
0c7dc45d | 1009 | * was in center_freq's band, that's enough, so lets |
fb1fc7ad LR |
1010 | * not overwrite it once found |
1011 | */ | |
0c7dc45d LR |
1012 | if (!band_rule_found) |
1013 | band_rule_found = freq_in_rule_band(fr, center_freq); | |
1014 | ||
e33e2241 | 1015 | bw_fits = reg_does_bw_fit(fr, center_freq, MHZ_TO_KHZ(20)); |
0c7dc45d | 1016 | |
361c9c8b JB |
1017 | if (band_rule_found && bw_fits) |
1018 | return rr; | |
8318d78a JB |
1019 | } |
1020 | ||
0c7dc45d | 1021 | if (!band_rule_found) |
361c9c8b | 1022 | return ERR_PTR(-ERANGE); |
0c7dc45d | 1023 | |
361c9c8b | 1024 | return ERR_PTR(-EINVAL); |
b2e1b302 LR |
1025 | } |
1026 | ||
361c9c8b JB |
1027 | const struct ieee80211_reg_rule *freq_reg_info(struct wiphy *wiphy, |
1028 | u32 center_freq) | |
1fa25e41 | 1029 | { |
5d885b99 | 1030 | const struct ieee80211_regdomain *regd; |
1a919318 | 1031 | |
e3961af1 | 1032 | regd = reg_get_regdomain(wiphy); |
5d885b99 | 1033 | |
361c9c8b | 1034 | return freq_reg_info_regd(wiphy, center_freq, regd); |
1fa25e41 | 1035 | } |
4f366c5d | 1036 | EXPORT_SYMBOL(freq_reg_info); |
b2e1b302 | 1037 | |
034c6d6e | 1038 | const char *reg_initiator_name(enum nl80211_reg_initiator initiator) |
926a0a09 LR |
1039 | { |
1040 | switch (initiator) { | |
1041 | case NL80211_REGDOM_SET_BY_CORE: | |
034c6d6e | 1042 | return "core"; |
926a0a09 | 1043 | case NL80211_REGDOM_SET_BY_USER: |
034c6d6e | 1044 | return "user"; |
926a0a09 | 1045 | case NL80211_REGDOM_SET_BY_DRIVER: |
034c6d6e | 1046 | return "driver"; |
926a0a09 | 1047 | case NL80211_REGDOM_SET_BY_COUNTRY_IE: |
034c6d6e | 1048 | return "country IE"; |
926a0a09 LR |
1049 | default: |
1050 | WARN_ON(1); | |
034c6d6e | 1051 | return "bug"; |
926a0a09 LR |
1052 | } |
1053 | } | |
034c6d6e | 1054 | EXPORT_SYMBOL(reg_initiator_name); |
e702d3cf | 1055 | |
034c6d6e | 1056 | #ifdef CONFIG_CFG80211_REG_DEBUG |
b0dfd2ea JD |
1057 | static void chan_reg_rule_print_dbg(const struct ieee80211_regdomain *regd, |
1058 | struct ieee80211_channel *chan, | |
e702d3cf LR |
1059 | const struct ieee80211_reg_rule *reg_rule) |
1060 | { | |
1061 | const struct ieee80211_power_rule *power_rule; | |
1062 | const struct ieee80211_freq_range *freq_range; | |
b0dfd2ea | 1063 | char max_antenna_gain[32], bw[32]; |
e702d3cf LR |
1064 | |
1065 | power_rule = ®_rule->power_rule; | |
1066 | freq_range = ®_rule->freq_range; | |
1067 | ||
1068 | if (!power_rule->max_antenna_gain) | |
b0dfd2ea | 1069 | snprintf(max_antenna_gain, sizeof(max_antenna_gain), "N/A"); |
e702d3cf | 1070 | else |
b0dfd2ea JD |
1071 | snprintf(max_antenna_gain, sizeof(max_antenna_gain), "%d", |
1072 | power_rule->max_antenna_gain); | |
1073 | ||
1074 | if (reg_rule->flags & NL80211_RRF_AUTO_BW) | |
1075 | snprintf(bw, sizeof(bw), "%d KHz, %d KHz AUTO", | |
1076 | freq_range->max_bandwidth_khz, | |
1077 | reg_get_max_bandwidth(regd, reg_rule)); | |
1078 | else | |
1079 | snprintf(bw, sizeof(bw), "%d KHz", | |
1080 | freq_range->max_bandwidth_khz); | |
e702d3cf | 1081 | |
fe7ef5e9 JB |
1082 | REG_DBG_PRINT("Updating information on frequency %d MHz with regulatory rule:\n", |
1083 | chan->center_freq); | |
e702d3cf | 1084 | |
b0dfd2ea | 1085 | REG_DBG_PRINT("%d KHz - %d KHz @ %s), (%s mBi, %d mBm)\n", |
1a919318 | 1086 | freq_range->start_freq_khz, freq_range->end_freq_khz, |
b0dfd2ea | 1087 | bw, max_antenna_gain, |
e702d3cf LR |
1088 | power_rule->max_eirp); |
1089 | } | |
1090 | #else | |
b0dfd2ea JD |
1091 | static void chan_reg_rule_print_dbg(const struct ieee80211_regdomain *regd, |
1092 | struct ieee80211_channel *chan, | |
e702d3cf LR |
1093 | const struct ieee80211_reg_rule *reg_rule) |
1094 | { | |
1095 | return; | |
1096 | } | |
926a0a09 LR |
1097 | #endif |
1098 | ||
e33e2241 JB |
1099 | /* |
1100 | * Note that right now we assume the desired channel bandwidth | |
1101 | * is always 20 MHz for each individual channel (HT40 uses 20 MHz | |
1102 | * per channel, the primary and the extension channel). | |
038659e7 | 1103 | */ |
7ca43d03 LR |
1104 | static void handle_channel(struct wiphy *wiphy, |
1105 | enum nl80211_reg_initiator initiator, | |
fdc9d7b2 | 1106 | struct ieee80211_channel *chan) |
b2e1b302 | 1107 | { |
038659e7 | 1108 | u32 flags, bw_flags = 0; |
b2e1b302 LR |
1109 | const struct ieee80211_reg_rule *reg_rule = NULL; |
1110 | const struct ieee80211_power_rule *power_rule = NULL; | |
038659e7 | 1111 | const struct ieee80211_freq_range *freq_range = NULL; |
fe33eb39 | 1112 | struct wiphy *request_wiphy = NULL; |
c492db37 | 1113 | struct regulatory_request *lr = get_last_request(); |
97524820 JD |
1114 | const struct ieee80211_regdomain *regd; |
1115 | u32 max_bandwidth_khz; | |
a92a3ce7 | 1116 | |
c492db37 | 1117 | request_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx); |
a92a3ce7 LR |
1118 | |
1119 | flags = chan->orig_flags; | |
b2e1b302 | 1120 | |
361c9c8b JB |
1121 | reg_rule = freq_reg_info(wiphy, MHZ_TO_KHZ(chan->center_freq)); |
1122 | if (IS_ERR(reg_rule)) { | |
ca4ffe8f LR |
1123 | /* |
1124 | * We will disable all channels that do not match our | |
25985edc | 1125 | * received regulatory rule unless the hint is coming |
ca4ffe8f LR |
1126 | * from a Country IE and the Country IE had no information |
1127 | * about a band. The IEEE 802.11 spec allows for an AP | |
1128 | * to send only a subset of the regulatory rules allowed, | |
1129 | * so an AP in the US that only supports 2.4 GHz may only send | |
1130 | * a country IE with information for the 2.4 GHz band | |
1131 | * while 5 GHz is still supported. | |
1132 | */ | |
1133 | if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE && | |
361c9c8b | 1134 | PTR_ERR(reg_rule) == -ERANGE) |
ca4ffe8f LR |
1135 | return; |
1136 | ||
cc493e4f LR |
1137 | if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER && |
1138 | request_wiphy && request_wiphy == wiphy && | |
a2f73b6c | 1139 | request_wiphy->regulatory_flags & REGULATORY_STRICT_REG) { |
cc493e4f LR |
1140 | REG_DBG_PRINT("Disabling freq %d MHz for good\n", |
1141 | chan->center_freq); | |
1142 | chan->orig_flags |= IEEE80211_CHAN_DISABLED; | |
1143 | chan->flags = chan->orig_flags; | |
1144 | } else { | |
1145 | REG_DBG_PRINT("Disabling freq %d MHz\n", | |
1146 | chan->center_freq); | |
1147 | chan->flags |= IEEE80211_CHAN_DISABLED; | |
1148 | } | |
8318d78a | 1149 | return; |
ca4ffe8f | 1150 | } |
8318d78a | 1151 | |
b0dfd2ea JD |
1152 | regd = reg_get_regdomain(wiphy); |
1153 | chan_reg_rule_print_dbg(regd, chan, reg_rule); | |
e702d3cf | 1154 | |
b2e1b302 | 1155 | power_rule = ®_rule->power_rule; |
038659e7 LR |
1156 | freq_range = ®_rule->freq_range; |
1157 | ||
97524820 JD |
1158 | max_bandwidth_khz = freq_range->max_bandwidth_khz; |
1159 | /* Check if auto calculation requested */ | |
b0dfd2ea | 1160 | if (reg_rule->flags & NL80211_RRF_AUTO_BW) |
97524820 | 1161 | max_bandwidth_khz = reg_get_max_bandwidth(regd, reg_rule); |
97524820 JD |
1162 | |
1163 | if (max_bandwidth_khz < MHZ_TO_KHZ(40)) | |
e33e2241 | 1164 | bw_flags = IEEE80211_CHAN_NO_HT40; |
97524820 | 1165 | if (max_bandwidth_khz < MHZ_TO_KHZ(80)) |
c7a6ee27 | 1166 | bw_flags |= IEEE80211_CHAN_NO_80MHZ; |
97524820 | 1167 | if (max_bandwidth_khz < MHZ_TO_KHZ(160)) |
c7a6ee27 | 1168 | bw_flags |= IEEE80211_CHAN_NO_160MHZ; |
b2e1b302 | 1169 | |
c492db37 | 1170 | if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER && |
806a9e39 | 1171 | request_wiphy && request_wiphy == wiphy && |
a2f73b6c | 1172 | request_wiphy->regulatory_flags & REGULATORY_STRICT_REG) { |
fb1fc7ad | 1173 | /* |
25985edc | 1174 | * This guarantees the driver's requested regulatory domain |
f976376d | 1175 | * will always be used as a base for further regulatory |
fb1fc7ad LR |
1176 | * settings |
1177 | */ | |
f976376d | 1178 | chan->flags = chan->orig_flags = |
038659e7 | 1179 | map_regdom_flags(reg_rule->flags) | bw_flags; |
f976376d LR |
1180 | chan->max_antenna_gain = chan->orig_mag = |
1181 | (int) MBI_TO_DBI(power_rule->max_antenna_gain); | |
279f0f55 | 1182 | chan->max_reg_power = chan->max_power = chan->orig_mpwr = |
f976376d | 1183 | (int) MBM_TO_DBM(power_rule->max_eirp); |
4f267c11 JD |
1184 | |
1185 | if (chan->flags & IEEE80211_CHAN_RADAR) { | |
1186 | chan->dfs_cac_ms = IEEE80211_DFS_MIN_CAC_TIME_MS; | |
1187 | if (reg_rule->dfs_cac_ms) | |
1188 | chan->dfs_cac_ms = reg_rule->dfs_cac_ms; | |
1189 | } | |
1190 | ||
f976376d LR |
1191 | return; |
1192 | } | |
1193 | ||
04f39047 SW |
1194 | chan->dfs_state = NL80211_DFS_USABLE; |
1195 | chan->dfs_state_entered = jiffies; | |
1196 | ||
aa3d7eef | 1197 | chan->beacon_found = false; |
038659e7 | 1198 | chan->flags = flags | bw_flags | map_regdom_flags(reg_rule->flags); |
1a919318 JB |
1199 | chan->max_antenna_gain = |
1200 | min_t(int, chan->orig_mag, | |
1201 | MBI_TO_DBI(power_rule->max_antenna_gain)); | |
eccc068e | 1202 | chan->max_reg_power = (int) MBM_TO_DBM(power_rule->max_eirp); |
089027e5 JD |
1203 | |
1204 | if (chan->flags & IEEE80211_CHAN_RADAR) { | |
1205 | if (reg_rule->dfs_cac_ms) | |
1206 | chan->dfs_cac_ms = reg_rule->dfs_cac_ms; | |
1207 | else | |
1208 | chan->dfs_cac_ms = IEEE80211_DFS_MIN_CAC_TIME_MS; | |
1209 | } | |
1210 | ||
5e31fc08 SG |
1211 | if (chan->orig_mpwr) { |
1212 | /* | |
a09a85a0 LR |
1213 | * Devices that use REGULATORY_COUNTRY_IE_FOLLOW_POWER |
1214 | * will always follow the passed country IE power settings. | |
5e31fc08 SG |
1215 | */ |
1216 | if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE && | |
a09a85a0 | 1217 | wiphy->regulatory_flags & REGULATORY_COUNTRY_IE_FOLLOW_POWER) |
5e31fc08 SG |
1218 | chan->max_power = chan->max_reg_power; |
1219 | else | |
1220 | chan->max_power = min(chan->orig_mpwr, | |
1221 | chan->max_reg_power); | |
1222 | } else | |
1223 | chan->max_power = chan->max_reg_power; | |
8318d78a JB |
1224 | } |
1225 | ||
7ca43d03 | 1226 | static void handle_band(struct wiphy *wiphy, |
fdc9d7b2 JB |
1227 | enum nl80211_reg_initiator initiator, |
1228 | struct ieee80211_supported_band *sband) | |
8318d78a | 1229 | { |
a92a3ce7 | 1230 | unsigned int i; |
a92a3ce7 | 1231 | |
fdc9d7b2 JB |
1232 | if (!sband) |
1233 | return; | |
8318d78a JB |
1234 | |
1235 | for (i = 0; i < sband->n_channels; i++) | |
fdc9d7b2 | 1236 | handle_channel(wiphy, initiator, &sband->channels[i]); |
8318d78a JB |
1237 | } |
1238 | ||
57b5ce07 LR |
1239 | static bool reg_request_cell_base(struct regulatory_request *request) |
1240 | { | |
1241 | if (request->initiator != NL80211_REGDOM_SET_BY_USER) | |
1242 | return false; | |
1a919318 | 1243 | return request->user_reg_hint_type == NL80211_USER_REG_HINT_CELL_BASE; |
57b5ce07 LR |
1244 | } |
1245 | ||
1246 | bool reg_last_request_cell_base(void) | |
1247 | { | |
38fd2143 | 1248 | return reg_request_cell_base(get_last_request()); |
57b5ce07 LR |
1249 | } |
1250 | ||
94fc661f | 1251 | #ifdef CONFIG_CFG80211_REG_CELLULAR_HINTS |
57b5ce07 | 1252 | /* Core specific check */ |
2f92212b JB |
1253 | static enum reg_request_treatment |
1254 | reg_ignore_cell_hint(struct regulatory_request *pending_request) | |
57b5ce07 | 1255 | { |
c492db37 JB |
1256 | struct regulatory_request *lr = get_last_request(); |
1257 | ||
57b5ce07 | 1258 | if (!reg_num_devs_support_basehint) |
2f92212b | 1259 | return REG_REQ_IGNORE; |
57b5ce07 | 1260 | |
c492db37 | 1261 | if (reg_request_cell_base(lr) && |
1a919318 | 1262 | !regdom_changes(pending_request->alpha2)) |
2f92212b | 1263 | return REG_REQ_ALREADY_SET; |
1a919318 | 1264 | |
2f92212b | 1265 | return REG_REQ_OK; |
57b5ce07 LR |
1266 | } |
1267 | ||
1268 | /* Device specific check */ | |
1269 | static bool reg_dev_ignore_cell_hint(struct wiphy *wiphy) | |
1270 | { | |
1a919318 | 1271 | return !(wiphy->features & NL80211_FEATURE_CELL_BASE_REG_HINTS); |
57b5ce07 LR |
1272 | } |
1273 | #else | |
1274 | static int reg_ignore_cell_hint(struct regulatory_request *pending_request) | |
1275 | { | |
2f92212b | 1276 | return REG_REQ_IGNORE; |
57b5ce07 | 1277 | } |
1a919318 JB |
1278 | |
1279 | static bool reg_dev_ignore_cell_hint(struct wiphy *wiphy) | |
57b5ce07 LR |
1280 | { |
1281 | return true; | |
1282 | } | |
1283 | #endif | |
1284 | ||
fa1fb9cb LR |
1285 | static bool wiphy_strict_alpha2_regd(struct wiphy *wiphy) |
1286 | { | |
a2f73b6c LR |
1287 | if (wiphy->regulatory_flags & REGULATORY_STRICT_REG && |
1288 | !(wiphy->regulatory_flags & REGULATORY_CUSTOM_REG)) | |
fa1fb9cb LR |
1289 | return true; |
1290 | return false; | |
1291 | } | |
57b5ce07 | 1292 | |
7db90f4a LR |
1293 | static bool ignore_reg_update(struct wiphy *wiphy, |
1294 | enum nl80211_reg_initiator initiator) | |
14b9815a | 1295 | { |
c492db37 JB |
1296 | struct regulatory_request *lr = get_last_request(); |
1297 | ||
b0d7aa59 JD |
1298 | if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) |
1299 | return true; | |
1300 | ||
c492db37 | 1301 | if (!lr) { |
034c6d6e LR |
1302 | REG_DBG_PRINT("Ignoring regulatory request set by %s " |
1303 | "since last_request is not set\n", | |
926a0a09 | 1304 | reg_initiator_name(initiator)); |
14b9815a | 1305 | return true; |
926a0a09 LR |
1306 | } |
1307 | ||
7db90f4a | 1308 | if (initiator == NL80211_REGDOM_SET_BY_CORE && |
a2f73b6c | 1309 | wiphy->regulatory_flags & REGULATORY_CUSTOM_REG) { |
034c6d6e LR |
1310 | REG_DBG_PRINT("Ignoring regulatory request set by %s " |
1311 | "since the driver uses its own custom " | |
1312 | "regulatory domain\n", | |
926a0a09 | 1313 | reg_initiator_name(initiator)); |
14b9815a | 1314 | return true; |
926a0a09 LR |
1315 | } |
1316 | ||
fb1fc7ad LR |
1317 | /* |
1318 | * wiphy->regd will be set once the device has its own | |
1319 | * desired regulatory domain set | |
1320 | */ | |
fa1fb9cb | 1321 | if (wiphy_strict_alpha2_regd(wiphy) && !wiphy->regd && |
749b527b | 1322 | initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && |
c492db37 | 1323 | !is_world_regdom(lr->alpha2)) { |
034c6d6e LR |
1324 | REG_DBG_PRINT("Ignoring regulatory request set by %s " |
1325 | "since the driver requires its own regulatory " | |
1326 | "domain to be set first\n", | |
926a0a09 | 1327 | reg_initiator_name(initiator)); |
14b9815a | 1328 | return true; |
926a0a09 LR |
1329 | } |
1330 | ||
c492db37 | 1331 | if (reg_request_cell_base(lr)) |
57b5ce07 LR |
1332 | return reg_dev_ignore_cell_hint(wiphy); |
1333 | ||
14b9815a LR |
1334 | return false; |
1335 | } | |
1336 | ||
3195e489 LR |
1337 | static bool reg_is_world_roaming(struct wiphy *wiphy) |
1338 | { | |
1339 | const struct ieee80211_regdomain *cr = get_cfg80211_regdom(); | |
1340 | const struct ieee80211_regdomain *wr = get_wiphy_regdom(wiphy); | |
1341 | struct regulatory_request *lr = get_last_request(); | |
1342 | ||
1343 | if (is_world_regdom(cr->alpha2) || (wr && is_world_regdom(wr->alpha2))) | |
1344 | return true; | |
1345 | ||
1346 | if (lr && lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && | |
a2f73b6c | 1347 | wiphy->regulatory_flags & REGULATORY_CUSTOM_REG) |
3195e489 LR |
1348 | return true; |
1349 | ||
1350 | return false; | |
1351 | } | |
1352 | ||
1a919318 | 1353 | static void handle_reg_beacon(struct wiphy *wiphy, unsigned int chan_idx, |
e38f8a7a LR |
1354 | struct reg_beacon *reg_beacon) |
1355 | { | |
e38f8a7a LR |
1356 | struct ieee80211_supported_band *sband; |
1357 | struct ieee80211_channel *chan; | |
6bad8766 LR |
1358 | bool channel_changed = false; |
1359 | struct ieee80211_channel chan_before; | |
e38f8a7a | 1360 | |
e38f8a7a LR |
1361 | sband = wiphy->bands[reg_beacon->chan.band]; |
1362 | chan = &sband->channels[chan_idx]; | |
1363 | ||
1364 | if (likely(chan->center_freq != reg_beacon->chan.center_freq)) | |
1365 | return; | |
1366 | ||
6bad8766 LR |
1367 | if (chan->beacon_found) |
1368 | return; | |
1369 | ||
1370 | chan->beacon_found = true; | |
1371 | ||
0f500a5f LR |
1372 | if (!reg_is_world_roaming(wiphy)) |
1373 | return; | |
1374 | ||
a2f73b6c | 1375 | if (wiphy->regulatory_flags & REGULATORY_DISABLE_BEACON_HINTS) |
37184244 LR |
1376 | return; |
1377 | ||
6bad8766 LR |
1378 | chan_before.center_freq = chan->center_freq; |
1379 | chan_before.flags = chan->flags; | |
1380 | ||
8fe02e16 LR |
1381 | if (chan->flags & IEEE80211_CHAN_NO_IR) { |
1382 | chan->flags &= ~IEEE80211_CHAN_NO_IR; | |
6bad8766 | 1383 | channel_changed = true; |
e38f8a7a LR |
1384 | } |
1385 | ||
6bad8766 LR |
1386 | if (channel_changed) |
1387 | nl80211_send_beacon_hint_event(wiphy, &chan_before, chan); | |
e38f8a7a LR |
1388 | } |
1389 | ||
1390 | /* | |
1391 | * Called when a scan on a wiphy finds a beacon on | |
1392 | * new channel | |
1393 | */ | |
1394 | static void wiphy_update_new_beacon(struct wiphy *wiphy, | |
1395 | struct reg_beacon *reg_beacon) | |
1396 | { | |
1397 | unsigned int i; | |
1398 | struct ieee80211_supported_band *sband; | |
1399 | ||
e38f8a7a LR |
1400 | if (!wiphy->bands[reg_beacon->chan.band]) |
1401 | return; | |
1402 | ||
1403 | sband = wiphy->bands[reg_beacon->chan.band]; | |
1404 | ||
1405 | for (i = 0; i < sband->n_channels; i++) | |
1406 | handle_reg_beacon(wiphy, i, reg_beacon); | |
1407 | } | |
1408 | ||
1409 | /* | |
1410 | * Called upon reg changes or a new wiphy is added | |
1411 | */ | |
1412 | static void wiphy_update_beacon_reg(struct wiphy *wiphy) | |
1413 | { | |
1414 | unsigned int i; | |
1415 | struct ieee80211_supported_band *sband; | |
1416 | struct reg_beacon *reg_beacon; | |
1417 | ||
e38f8a7a LR |
1418 | list_for_each_entry(reg_beacon, ®_beacon_list, list) { |
1419 | if (!wiphy->bands[reg_beacon->chan.band]) | |
1420 | continue; | |
1421 | sband = wiphy->bands[reg_beacon->chan.band]; | |
1422 | for (i = 0; i < sband->n_channels; i++) | |
1423 | handle_reg_beacon(wiphy, i, reg_beacon); | |
1424 | } | |
1425 | } | |
1426 | ||
e38f8a7a LR |
1427 | /* Reap the advantages of previously found beacons */ |
1428 | static void reg_process_beacons(struct wiphy *wiphy) | |
1429 | { | |
b1ed8ddd LR |
1430 | /* |
1431 | * Means we are just firing up cfg80211, so no beacons would | |
1432 | * have been processed yet. | |
1433 | */ | |
1434 | if (!last_request) | |
1435 | return; | |
e38f8a7a LR |
1436 | wiphy_update_beacon_reg(wiphy); |
1437 | } | |
1438 | ||
1a919318 | 1439 | static bool is_ht40_allowed(struct ieee80211_channel *chan) |
038659e7 LR |
1440 | { |
1441 | if (!chan) | |
1a919318 | 1442 | return false; |
038659e7 | 1443 | if (chan->flags & IEEE80211_CHAN_DISABLED) |
1a919318 | 1444 | return false; |
038659e7 | 1445 | /* This would happen when regulatory rules disallow HT40 completely */ |
55b183ad FF |
1446 | if ((chan->flags & IEEE80211_CHAN_NO_HT40) == IEEE80211_CHAN_NO_HT40) |
1447 | return false; | |
1448 | return true; | |
038659e7 LR |
1449 | } |
1450 | ||
1451 | static void reg_process_ht_flags_channel(struct wiphy *wiphy, | |
fdc9d7b2 | 1452 | struct ieee80211_channel *channel) |
038659e7 | 1453 | { |
fdc9d7b2 | 1454 | struct ieee80211_supported_band *sband = wiphy->bands[channel->band]; |
038659e7 LR |
1455 | struct ieee80211_channel *channel_before = NULL, *channel_after = NULL; |
1456 | unsigned int i; | |
1457 | ||
1a919318 | 1458 | if (!is_ht40_allowed(channel)) { |
038659e7 LR |
1459 | channel->flags |= IEEE80211_CHAN_NO_HT40; |
1460 | return; | |
1461 | } | |
1462 | ||
1463 | /* | |
1464 | * We need to ensure the extension channels exist to | |
1465 | * be able to use HT40- or HT40+, this finds them (or not) | |
1466 | */ | |
1467 | for (i = 0; i < sband->n_channels; i++) { | |
1468 | struct ieee80211_channel *c = &sband->channels[i]; | |
1a919318 | 1469 | |
038659e7 LR |
1470 | if (c->center_freq == (channel->center_freq - 20)) |
1471 | channel_before = c; | |
1472 | if (c->center_freq == (channel->center_freq + 20)) | |
1473 | channel_after = c; | |
1474 | } | |
1475 | ||
1476 | /* | |
1477 | * Please note that this assumes target bandwidth is 20 MHz, | |
1478 | * if that ever changes we also need to change the below logic | |
1479 | * to include that as well. | |
1480 | */ | |
1a919318 | 1481 | if (!is_ht40_allowed(channel_before)) |
689da1b3 | 1482 | channel->flags |= IEEE80211_CHAN_NO_HT40MINUS; |
038659e7 | 1483 | else |
689da1b3 | 1484 | channel->flags &= ~IEEE80211_CHAN_NO_HT40MINUS; |
038659e7 | 1485 | |
1a919318 | 1486 | if (!is_ht40_allowed(channel_after)) |
689da1b3 | 1487 | channel->flags |= IEEE80211_CHAN_NO_HT40PLUS; |
038659e7 | 1488 | else |
689da1b3 | 1489 | channel->flags &= ~IEEE80211_CHAN_NO_HT40PLUS; |
038659e7 LR |
1490 | } |
1491 | ||
1492 | static void reg_process_ht_flags_band(struct wiphy *wiphy, | |
fdc9d7b2 | 1493 | struct ieee80211_supported_band *sband) |
038659e7 LR |
1494 | { |
1495 | unsigned int i; | |
038659e7 | 1496 | |
fdc9d7b2 JB |
1497 | if (!sband) |
1498 | return; | |
038659e7 LR |
1499 | |
1500 | for (i = 0; i < sband->n_channels; i++) | |
fdc9d7b2 | 1501 | reg_process_ht_flags_channel(wiphy, &sband->channels[i]); |
038659e7 LR |
1502 | } |
1503 | ||
1504 | static void reg_process_ht_flags(struct wiphy *wiphy) | |
1505 | { | |
1506 | enum ieee80211_band band; | |
1507 | ||
1508 | if (!wiphy) | |
1509 | return; | |
1510 | ||
fdc9d7b2 JB |
1511 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) |
1512 | reg_process_ht_flags_band(wiphy, wiphy->bands[band]); | |
038659e7 LR |
1513 | } |
1514 | ||
0e3802db LR |
1515 | static void reg_call_notifier(struct wiphy *wiphy, |
1516 | struct regulatory_request *request) | |
1517 | { | |
1518 | if (wiphy->reg_notifier) | |
1519 | wiphy->reg_notifier(wiphy, request); | |
1520 | } | |
1521 | ||
ad932f04 AN |
1522 | static bool reg_wdev_chan_valid(struct wiphy *wiphy, struct wireless_dev *wdev) |
1523 | { | |
ad932f04 AN |
1524 | struct cfg80211_chan_def chandef; |
1525 | struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); | |
20658702 | 1526 | enum nl80211_iftype iftype; |
ad932f04 AN |
1527 | |
1528 | wdev_lock(wdev); | |
20658702 | 1529 | iftype = wdev->iftype; |
ad932f04 | 1530 | |
20658702 | 1531 | /* make sure the interface is active */ |
ad932f04 | 1532 | if (!wdev->netdev || !netif_running(wdev->netdev)) |
20658702 | 1533 | goto wdev_inactive_unlock; |
ad932f04 | 1534 | |
20658702 | 1535 | switch (iftype) { |
ad932f04 AN |
1536 | case NL80211_IFTYPE_AP: |
1537 | case NL80211_IFTYPE_P2P_GO: | |
1538 | if (!wdev->beacon_interval) | |
20658702 AN |
1539 | goto wdev_inactive_unlock; |
1540 | chandef = wdev->chandef; | |
185076d6 AN |
1541 | break; |
1542 | case NL80211_IFTYPE_ADHOC: | |
1543 | if (!wdev->ssid_len) | |
20658702 AN |
1544 | goto wdev_inactive_unlock; |
1545 | chandef = wdev->chandef; | |
ad932f04 AN |
1546 | break; |
1547 | case NL80211_IFTYPE_STATION: | |
1548 | case NL80211_IFTYPE_P2P_CLIENT: | |
ad932f04 AN |
1549 | if (!wdev->current_bss || |
1550 | !wdev->current_bss->pub.channel) | |
20658702 | 1551 | goto wdev_inactive_unlock; |
ad932f04 | 1552 | |
20658702 AN |
1553 | if (!rdev->ops->get_channel || |
1554 | rdev_get_channel(rdev, wdev, &chandef)) | |
1555 | cfg80211_chandef_create(&chandef, | |
1556 | wdev->current_bss->pub.channel, | |
1557 | NL80211_CHAN_NO_HT); | |
ad932f04 AN |
1558 | break; |
1559 | case NL80211_IFTYPE_MONITOR: | |
1560 | case NL80211_IFTYPE_AP_VLAN: | |
1561 | case NL80211_IFTYPE_P2P_DEVICE: | |
1562 | /* no enforcement required */ | |
1563 | break; | |
1564 | default: | |
1565 | /* others not implemented for now */ | |
1566 | WARN_ON(1); | |
1567 | break; | |
1568 | } | |
1569 | ||
ad932f04 | 1570 | wdev_unlock(wdev); |
20658702 AN |
1571 | |
1572 | switch (iftype) { | |
1573 | case NL80211_IFTYPE_AP: | |
1574 | case NL80211_IFTYPE_P2P_GO: | |
1575 | case NL80211_IFTYPE_ADHOC: | |
1576 | return cfg80211_reg_can_beacon(wiphy, &chandef, iftype); | |
1577 | case NL80211_IFTYPE_STATION: | |
1578 | case NL80211_IFTYPE_P2P_CLIENT: | |
1579 | return cfg80211_chandef_usable(wiphy, &chandef, | |
1580 | IEEE80211_CHAN_DISABLED); | |
1581 | default: | |
1582 | break; | |
1583 | } | |
1584 | ||
1585 | return true; | |
1586 | ||
1587 | wdev_inactive_unlock: | |
1588 | wdev_unlock(wdev); | |
1589 | return true; | |
ad932f04 AN |
1590 | } |
1591 | ||
1592 | static void reg_leave_invalid_chans(struct wiphy *wiphy) | |
1593 | { | |
1594 | struct wireless_dev *wdev; | |
1595 | struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); | |
1596 | ||
1597 | ASSERT_RTNL(); | |
1598 | ||
1599 | list_for_each_entry(wdev, &rdev->wdev_list, list) | |
1600 | if (!reg_wdev_chan_valid(wiphy, wdev)) | |
1601 | cfg80211_leave(rdev, wdev); | |
1602 | } | |
1603 | ||
1604 | static void reg_check_chans_work(struct work_struct *work) | |
1605 | { | |
1606 | struct cfg80211_registered_device *rdev; | |
1607 | ||
1608 | REG_DBG_PRINT("Verifying active interfaces after reg change\n"); | |
1609 | rtnl_lock(); | |
1610 | ||
1611 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) | |
1612 | if (!(rdev->wiphy.regulatory_flags & | |
1613 | REGULATORY_IGNORE_STALE_KICKOFF)) | |
1614 | reg_leave_invalid_chans(&rdev->wiphy); | |
1615 | ||
1616 | rtnl_unlock(); | |
1617 | } | |
1618 | ||
1619 | static void reg_check_channels(void) | |
1620 | { | |
1621 | /* | |
1622 | * Give usermode a chance to do something nicer (move to another | |
1623 | * channel, orderly disconnection), before forcing a disconnection. | |
1624 | */ | |
1625 | mod_delayed_work(system_power_efficient_wq, | |
1626 | ®_check_chans, | |
1627 | msecs_to_jiffies(REG_ENFORCE_GRACE_MS)); | |
1628 | } | |
1629 | ||
eac03e38 SN |
1630 | static void wiphy_update_regulatory(struct wiphy *wiphy, |
1631 | enum nl80211_reg_initiator initiator) | |
b2e1b302 LR |
1632 | { |
1633 | enum ieee80211_band band; | |
c492db37 | 1634 | struct regulatory_request *lr = get_last_request(); |
eac03e38 | 1635 | |
0e3802db LR |
1636 | if (ignore_reg_update(wiphy, initiator)) { |
1637 | /* | |
1638 | * Regulatory updates set by CORE are ignored for custom | |
1639 | * regulatory cards. Let us notify the changes to the driver, | |
1640 | * as some drivers used this to restore its orig_* reg domain. | |
1641 | */ | |
1642 | if (initiator == NL80211_REGDOM_SET_BY_CORE && | |
a2f73b6c | 1643 | wiphy->regulatory_flags & REGULATORY_CUSTOM_REG) |
0e3802db | 1644 | reg_call_notifier(wiphy, lr); |
a203c2aa | 1645 | return; |
0e3802db | 1646 | } |
a203c2aa | 1647 | |
c492db37 | 1648 | lr->dfs_region = get_cfg80211_regdom()->dfs_region; |
b68e6b3b | 1649 | |
fdc9d7b2 JB |
1650 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) |
1651 | handle_band(wiphy, initiator, wiphy->bands[band]); | |
a203c2aa | 1652 | |
e38f8a7a | 1653 | reg_process_beacons(wiphy); |
038659e7 | 1654 | reg_process_ht_flags(wiphy); |
0e3802db | 1655 | reg_call_notifier(wiphy, lr); |
b2e1b302 LR |
1656 | } |
1657 | ||
d7549cbb SN |
1658 | static void update_all_wiphy_regulatory(enum nl80211_reg_initiator initiator) |
1659 | { | |
1660 | struct cfg80211_registered_device *rdev; | |
4a38994f | 1661 | struct wiphy *wiphy; |
d7549cbb | 1662 | |
5fe231e8 | 1663 | ASSERT_RTNL(); |
458f4f9e | 1664 | |
4a38994f RM |
1665 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) { |
1666 | wiphy = &rdev->wiphy; | |
1667 | wiphy_update_regulatory(wiphy, initiator); | |
4a38994f | 1668 | } |
ad932f04 AN |
1669 | |
1670 | reg_check_channels(); | |
d7549cbb SN |
1671 | } |
1672 | ||
1fa25e41 | 1673 | static void handle_channel_custom(struct wiphy *wiphy, |
fdc9d7b2 | 1674 | struct ieee80211_channel *chan, |
1fa25e41 LR |
1675 | const struct ieee80211_regdomain *regd) |
1676 | { | |
038659e7 | 1677 | u32 bw_flags = 0; |
1fa25e41 LR |
1678 | const struct ieee80211_reg_rule *reg_rule = NULL; |
1679 | const struct ieee80211_power_rule *power_rule = NULL; | |
038659e7 | 1680 | const struct ieee80211_freq_range *freq_range = NULL; |
97524820 | 1681 | u32 max_bandwidth_khz; |
ac46d48e | 1682 | |
361c9c8b JB |
1683 | reg_rule = freq_reg_info_regd(wiphy, MHZ_TO_KHZ(chan->center_freq), |
1684 | regd); | |
1fa25e41 | 1685 | |
361c9c8b | 1686 | if (IS_ERR(reg_rule)) { |
fe7ef5e9 JB |
1687 | REG_DBG_PRINT("Disabling freq %d MHz as custom regd has no rule that fits it\n", |
1688 | chan->center_freq); | |
db8dfee5 AN |
1689 | if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) { |
1690 | chan->flags |= IEEE80211_CHAN_DISABLED; | |
1691 | } else { | |
1692 | chan->orig_flags |= IEEE80211_CHAN_DISABLED; | |
1693 | chan->flags = chan->orig_flags; | |
1694 | } | |
1fa25e41 LR |
1695 | return; |
1696 | } | |
1697 | ||
b0dfd2ea | 1698 | chan_reg_rule_print_dbg(regd, chan, reg_rule); |
e702d3cf | 1699 | |
1fa25e41 | 1700 | power_rule = ®_rule->power_rule; |
038659e7 LR |
1701 | freq_range = ®_rule->freq_range; |
1702 | ||
97524820 JD |
1703 | max_bandwidth_khz = freq_range->max_bandwidth_khz; |
1704 | /* Check if auto calculation requested */ | |
b0dfd2ea | 1705 | if (reg_rule->flags & NL80211_RRF_AUTO_BW) |
97524820 JD |
1706 | max_bandwidth_khz = reg_get_max_bandwidth(regd, reg_rule); |
1707 | ||
1708 | if (max_bandwidth_khz < MHZ_TO_KHZ(40)) | |
e33e2241 | 1709 | bw_flags = IEEE80211_CHAN_NO_HT40; |
97524820 | 1710 | if (max_bandwidth_khz < MHZ_TO_KHZ(80)) |
c7a6ee27 | 1711 | bw_flags |= IEEE80211_CHAN_NO_80MHZ; |
97524820 | 1712 | if (max_bandwidth_khz < MHZ_TO_KHZ(160)) |
c7a6ee27 | 1713 | bw_flags |= IEEE80211_CHAN_NO_160MHZ; |
1fa25e41 | 1714 | |
2e18b38f | 1715 | chan->dfs_state_entered = jiffies; |
c7ab5081 AN |
1716 | chan->dfs_state = NL80211_DFS_USABLE; |
1717 | ||
1718 | chan->beacon_found = false; | |
db8dfee5 AN |
1719 | |
1720 | if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) | |
1721 | chan->flags = chan->orig_flags | bw_flags | | |
1722 | map_regdom_flags(reg_rule->flags); | |
1723 | else | |
1724 | chan->flags |= map_regdom_flags(reg_rule->flags) | bw_flags; | |
1725 | ||
1fa25e41 | 1726 | chan->max_antenna_gain = (int) MBI_TO_DBI(power_rule->max_antenna_gain); |
279f0f55 FF |
1727 | chan->max_reg_power = chan->max_power = |
1728 | (int) MBM_TO_DBM(power_rule->max_eirp); | |
2e18b38f AN |
1729 | |
1730 | if (chan->flags & IEEE80211_CHAN_RADAR) { | |
1731 | if (reg_rule->dfs_cac_ms) | |
1732 | chan->dfs_cac_ms = reg_rule->dfs_cac_ms; | |
1733 | else | |
1734 | chan->dfs_cac_ms = IEEE80211_DFS_MIN_CAC_TIME_MS; | |
1735 | } | |
1736 | ||
1737 | chan->max_power = chan->max_reg_power; | |
1fa25e41 LR |
1738 | } |
1739 | ||
fdc9d7b2 JB |
1740 | static void handle_band_custom(struct wiphy *wiphy, |
1741 | struct ieee80211_supported_band *sband, | |
1fa25e41 LR |
1742 | const struct ieee80211_regdomain *regd) |
1743 | { | |
1744 | unsigned int i; | |
1fa25e41 | 1745 | |
fdc9d7b2 JB |
1746 | if (!sband) |
1747 | return; | |
1fa25e41 LR |
1748 | |
1749 | for (i = 0; i < sband->n_channels; i++) | |
fdc9d7b2 | 1750 | handle_channel_custom(wiphy, &sband->channels[i], regd); |
1fa25e41 LR |
1751 | } |
1752 | ||
1753 | /* Used by drivers prior to wiphy registration */ | |
1754 | void wiphy_apply_custom_regulatory(struct wiphy *wiphy, | |
1755 | const struct ieee80211_regdomain *regd) | |
1756 | { | |
1757 | enum ieee80211_band band; | |
bbcf3f02 | 1758 | unsigned int bands_set = 0; |
ac46d48e | 1759 | |
a2f73b6c LR |
1760 | WARN(!(wiphy->regulatory_flags & REGULATORY_CUSTOM_REG), |
1761 | "wiphy should have REGULATORY_CUSTOM_REG\n"); | |
1762 | wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG; | |
222ea581 | 1763 | |
1fa25e41 | 1764 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) { |
bbcf3f02 LR |
1765 | if (!wiphy->bands[band]) |
1766 | continue; | |
fdc9d7b2 | 1767 | handle_band_custom(wiphy, wiphy->bands[band], regd); |
bbcf3f02 | 1768 | bands_set++; |
b2e1b302 | 1769 | } |
bbcf3f02 LR |
1770 | |
1771 | /* | |
1772 | * no point in calling this if it won't have any effect | |
1a919318 | 1773 | * on your device's supported bands. |
bbcf3f02 LR |
1774 | */ |
1775 | WARN_ON(!bands_set); | |
b2e1b302 | 1776 | } |
1fa25e41 LR |
1777 | EXPORT_SYMBOL(wiphy_apply_custom_regulatory); |
1778 | ||
b2e253cf LR |
1779 | static void reg_set_request_processed(void) |
1780 | { | |
1781 | bool need_more_processing = false; | |
c492db37 | 1782 | struct regulatory_request *lr = get_last_request(); |
b2e253cf | 1783 | |
c492db37 | 1784 | lr->processed = true; |
b2e253cf LR |
1785 | |
1786 | spin_lock(®_requests_lock); | |
1787 | if (!list_empty(®_requests_list)) | |
1788 | need_more_processing = true; | |
1789 | spin_unlock(®_requests_lock); | |
1790 | ||
c492db37 | 1791 | if (lr->initiator == NL80211_REGDOM_SET_BY_USER) |
fe20b39e | 1792 | cancel_delayed_work(®_timeout); |
a90c7a31 | 1793 | |
b2e253cf LR |
1794 | if (need_more_processing) |
1795 | schedule_work(®_work); | |
1796 | } | |
1797 | ||
b3eb7f3f LR |
1798 | /** |
1799 | * reg_process_hint_core - process core regulatory requests | |
1800 | * @pending_request: a pending core regulatory request | |
1801 | * | |
1802 | * The wireless subsystem can use this function to process | |
1803 | * a regulatory request issued by the regulatory core. | |
1804 | * | |
1805 | * Returns one of the different reg request treatment values. | |
1806 | */ | |
1807 | static enum reg_request_treatment | |
1808 | reg_process_hint_core(struct regulatory_request *core_request) | |
1809 | { | |
b3eb7f3f LR |
1810 | |
1811 | core_request->intersect = false; | |
1812 | core_request->processed = false; | |
5ad6ef5e | 1813 | |
05f1a3ea | 1814 | reg_update_last_request(core_request); |
b3eb7f3f | 1815 | |
fe6631ff | 1816 | return reg_call_crda(core_request); |
b3eb7f3f LR |
1817 | } |
1818 | ||
0d97a619 LR |
1819 | static enum reg_request_treatment |
1820 | __reg_process_hint_user(struct regulatory_request *user_request) | |
1821 | { | |
1822 | struct regulatory_request *lr = get_last_request(); | |
1823 | ||
1824 | if (reg_request_cell_base(user_request)) | |
1825 | return reg_ignore_cell_hint(user_request); | |
1826 | ||
1827 | if (reg_request_cell_base(lr)) | |
1828 | return REG_REQ_IGNORE; | |
1829 | ||
1830 | if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) | |
1831 | return REG_REQ_INTERSECT; | |
1832 | /* | |
1833 | * If the user knows better the user should set the regdom | |
1834 | * to their country before the IE is picked up | |
1835 | */ | |
1836 | if (lr->initiator == NL80211_REGDOM_SET_BY_USER && | |
1837 | lr->intersect) | |
1838 | return REG_REQ_IGNORE; | |
1839 | /* | |
1840 | * Process user requests only after previous user/driver/core | |
1841 | * requests have been processed | |
1842 | */ | |
1843 | if ((lr->initiator == NL80211_REGDOM_SET_BY_CORE || | |
1844 | lr->initiator == NL80211_REGDOM_SET_BY_DRIVER || | |
1845 | lr->initiator == NL80211_REGDOM_SET_BY_USER) && | |
1846 | regdom_changes(lr->alpha2)) | |
1847 | return REG_REQ_IGNORE; | |
1848 | ||
1849 | if (!regdom_changes(user_request->alpha2)) | |
1850 | return REG_REQ_ALREADY_SET; | |
1851 | ||
1852 | return REG_REQ_OK; | |
1853 | } | |
1854 | ||
1855 | /** | |
1856 | * reg_process_hint_user - process user regulatory requests | |
1857 | * @user_request: a pending user regulatory request | |
1858 | * | |
1859 | * The wireless subsystem can use this function to process | |
1860 | * a regulatory request initiated by userspace. | |
1861 | * | |
1862 | * Returns one of the different reg request treatment values. | |
1863 | */ | |
1864 | static enum reg_request_treatment | |
1865 | reg_process_hint_user(struct regulatory_request *user_request) | |
1866 | { | |
1867 | enum reg_request_treatment treatment; | |
0d97a619 LR |
1868 | |
1869 | treatment = __reg_process_hint_user(user_request); | |
1870 | if (treatment == REG_REQ_IGNORE || | |
0c4ddcd2 | 1871 | treatment == REG_REQ_ALREADY_SET) { |
c888393b | 1872 | reg_free_request(user_request); |
0d97a619 LR |
1873 | return treatment; |
1874 | } | |
1875 | ||
0d97a619 LR |
1876 | user_request->intersect = treatment == REG_REQ_INTERSECT; |
1877 | user_request->processed = false; | |
5ad6ef5e | 1878 | |
05f1a3ea | 1879 | reg_update_last_request(user_request); |
0d97a619 LR |
1880 | |
1881 | user_alpha2[0] = user_request->alpha2[0]; | |
1882 | user_alpha2[1] = user_request->alpha2[1]; | |
1883 | ||
fe6631ff | 1884 | return reg_call_crda(user_request); |
0d97a619 LR |
1885 | } |
1886 | ||
21636c7f LR |
1887 | static enum reg_request_treatment |
1888 | __reg_process_hint_driver(struct regulatory_request *driver_request) | |
1889 | { | |
1890 | struct regulatory_request *lr = get_last_request(); | |
1891 | ||
1892 | if (lr->initiator == NL80211_REGDOM_SET_BY_CORE) { | |
1893 | if (regdom_changes(driver_request->alpha2)) | |
1894 | return REG_REQ_OK; | |
1895 | return REG_REQ_ALREADY_SET; | |
1896 | } | |
1897 | ||
1898 | /* | |
1899 | * This would happen if you unplug and plug your card | |
1900 | * back in or if you add a new device for which the previously | |
1901 | * loaded card also agrees on the regulatory domain. | |
1902 | */ | |
1903 | if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER && | |
1904 | !regdom_changes(driver_request->alpha2)) | |
1905 | return REG_REQ_ALREADY_SET; | |
1906 | ||
1907 | return REG_REQ_INTERSECT; | |
1908 | } | |
1909 | ||
1910 | /** | |
1911 | * reg_process_hint_driver - process driver regulatory requests | |
1912 | * @driver_request: a pending driver regulatory request | |
1913 | * | |
1914 | * The wireless subsystem can use this function to process | |
1915 | * a regulatory request issued by an 802.11 driver. | |
1916 | * | |
1917 | * Returns one of the different reg request treatment values. | |
1918 | */ | |
1919 | static enum reg_request_treatment | |
1920 | reg_process_hint_driver(struct wiphy *wiphy, | |
1921 | struct regulatory_request *driver_request) | |
1922 | { | |
34f05f54 | 1923 | const struct ieee80211_regdomain *regd, *tmp; |
21636c7f | 1924 | enum reg_request_treatment treatment; |
21636c7f LR |
1925 | |
1926 | treatment = __reg_process_hint_driver(driver_request); | |
1927 | ||
1928 | switch (treatment) { | |
1929 | case REG_REQ_OK: | |
1930 | break; | |
1931 | case REG_REQ_IGNORE: | |
c888393b | 1932 | reg_free_request(driver_request); |
21636c7f LR |
1933 | return treatment; |
1934 | case REG_REQ_INTERSECT: | |
1935 | /* fall through */ | |
1936 | case REG_REQ_ALREADY_SET: | |
1937 | regd = reg_copy_regd(get_cfg80211_regdom()); | |
1938 | if (IS_ERR(regd)) { | |
c888393b | 1939 | reg_free_request(driver_request); |
21636c7f LR |
1940 | return REG_REQ_IGNORE; |
1941 | } | |
34f05f54 AN |
1942 | |
1943 | tmp = get_wiphy_regdom(wiphy); | |
21636c7f | 1944 | rcu_assign_pointer(wiphy->regd, regd); |
34f05f54 | 1945 | rcu_free_regdom(tmp); |
21636c7f LR |
1946 | } |
1947 | ||
21636c7f LR |
1948 | |
1949 | driver_request->intersect = treatment == REG_REQ_INTERSECT; | |
1950 | driver_request->processed = false; | |
5ad6ef5e | 1951 | |
05f1a3ea | 1952 | reg_update_last_request(driver_request); |
21636c7f LR |
1953 | |
1954 | /* | |
1955 | * Since CRDA will not be called in this case as we already | |
1956 | * have applied the requested regulatory domain before we just | |
1957 | * inform userspace we have processed the request | |
1958 | */ | |
1959 | if (treatment == REG_REQ_ALREADY_SET) { | |
1960 | nl80211_send_reg_change_event(driver_request); | |
1961 | reg_set_request_processed(); | |
1962 | return treatment; | |
1963 | } | |
1964 | ||
fe6631ff | 1965 | return reg_call_crda(driver_request); |
21636c7f LR |
1966 | } |
1967 | ||
b23e7a9e LR |
1968 | static enum reg_request_treatment |
1969 | __reg_process_hint_country_ie(struct wiphy *wiphy, | |
1970 | struct regulatory_request *country_ie_request) | |
1971 | { | |
1972 | struct wiphy *last_wiphy = NULL; | |
1973 | struct regulatory_request *lr = get_last_request(); | |
1974 | ||
1975 | if (reg_request_cell_base(lr)) { | |
1976 | /* Trust a Cell base station over the AP's country IE */ | |
1977 | if (regdom_changes(country_ie_request->alpha2)) | |
1978 | return REG_REQ_IGNORE; | |
1979 | return REG_REQ_ALREADY_SET; | |
2a901468 LR |
1980 | } else { |
1981 | if (wiphy->regulatory_flags & REGULATORY_COUNTRY_IE_IGNORE) | |
1982 | return REG_REQ_IGNORE; | |
b23e7a9e LR |
1983 | } |
1984 | ||
b23e7a9e LR |
1985 | if (unlikely(!is_an_alpha2(country_ie_request->alpha2))) |
1986 | return -EINVAL; | |
2f1c6c57 LR |
1987 | |
1988 | if (lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE) | |
1989 | return REG_REQ_OK; | |
1990 | ||
1991 | last_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx); | |
1992 | ||
1993 | if (last_wiphy != wiphy) { | |
b23e7a9e | 1994 | /* |
2f1c6c57 LR |
1995 | * Two cards with two APs claiming different |
1996 | * Country IE alpha2s. We could | |
1997 | * intersect them, but that seems unlikely | |
1998 | * to be correct. Reject second one for now. | |
b23e7a9e | 1999 | */ |
2f1c6c57 LR |
2000 | if (regdom_changes(country_ie_request->alpha2)) |
2001 | return REG_REQ_IGNORE; | |
b23e7a9e LR |
2002 | return REG_REQ_ALREADY_SET; |
2003 | } | |
70dcec5a EG |
2004 | |
2005 | if (regdom_changes(country_ie_request->alpha2)) | |
2f1c6c57 LR |
2006 | return REG_REQ_OK; |
2007 | return REG_REQ_ALREADY_SET; | |
b23e7a9e LR |
2008 | } |
2009 | ||
d1c96a9a | 2010 | /** |
b23e7a9e LR |
2011 | * reg_process_hint_country_ie - process regulatory requests from country IEs |
2012 | * @country_ie_request: a regulatory request from a country IE | |
d1c96a9a | 2013 | * |
b23e7a9e LR |
2014 | * The wireless subsystem can use this function to process |
2015 | * a regulatory request issued by a country Information Element. | |
d1c96a9a | 2016 | * |
2f92212b | 2017 | * Returns one of the different reg request treatment values. |
d1c96a9a | 2018 | */ |
2f92212b | 2019 | static enum reg_request_treatment |
b23e7a9e LR |
2020 | reg_process_hint_country_ie(struct wiphy *wiphy, |
2021 | struct regulatory_request *country_ie_request) | |
b2e1b302 | 2022 | { |
2f92212b | 2023 | enum reg_request_treatment treatment; |
761cf7ec | 2024 | |
b23e7a9e | 2025 | treatment = __reg_process_hint_country_ie(wiphy, country_ie_request); |
9c96477d | 2026 | |
2f92212b | 2027 | switch (treatment) { |
2f92212b JB |
2028 | case REG_REQ_OK: |
2029 | break; | |
b23e7a9e LR |
2030 | case REG_REQ_IGNORE: |
2031 | /* fall through */ | |
2032 | case REG_REQ_ALREADY_SET: | |
c888393b | 2033 | reg_free_request(country_ie_request); |
b23e7a9e LR |
2034 | return treatment; |
2035 | case REG_REQ_INTERSECT: | |
c888393b | 2036 | reg_free_request(country_ie_request); |
fb1fc7ad | 2037 | /* |
b23e7a9e LR |
2038 | * This doesn't happen yet, not sure we |
2039 | * ever want to support it for this case. | |
fb1fc7ad | 2040 | */ |
b23e7a9e LR |
2041 | WARN_ONCE(1, "Unexpected intersection for country IEs"); |
2042 | return REG_REQ_IGNORE; | |
3e0c3ff3 | 2043 | } |
b2e1b302 | 2044 | |
b23e7a9e LR |
2045 | country_ie_request->intersect = false; |
2046 | country_ie_request->processed = false; | |
5ad6ef5e | 2047 | |
05f1a3ea | 2048 | reg_update_last_request(country_ie_request); |
3e0c3ff3 | 2049 | |
fe6631ff | 2050 | return reg_call_crda(country_ie_request); |
b2e1b302 LR |
2051 | } |
2052 | ||
30a548c7 | 2053 | /* This processes *all* regulatory hints */ |
1daa37c7 | 2054 | static void reg_process_hint(struct regulatory_request *reg_request) |
fe33eb39 | 2055 | { |
fe33eb39 | 2056 | struct wiphy *wiphy = NULL; |
b3eb7f3f | 2057 | enum reg_request_treatment treatment; |
fe33eb39 | 2058 | |
f4173766 | 2059 | if (reg_request->wiphy_idx != WIPHY_IDX_INVALID) |
fe33eb39 LR |
2060 | wiphy = wiphy_idx_to_wiphy(reg_request->wiphy_idx); |
2061 | ||
b3eb7f3f LR |
2062 | switch (reg_request->initiator) { |
2063 | case NL80211_REGDOM_SET_BY_CORE: | |
2064 | reg_process_hint_core(reg_request); | |
2065 | return; | |
2066 | case NL80211_REGDOM_SET_BY_USER: | |
0d97a619 | 2067 | treatment = reg_process_hint_user(reg_request); |
50c11eb9 | 2068 | if (treatment == REG_REQ_IGNORE || |
0c4ddcd2 | 2069 | treatment == REG_REQ_ALREADY_SET) |
0d97a619 | 2070 | return; |
845f3351 SD |
2071 | queue_delayed_work(system_power_efficient_wq, |
2072 | ®_timeout, msecs_to_jiffies(3142)); | |
0d97a619 | 2073 | return; |
b3eb7f3f | 2074 | case NL80211_REGDOM_SET_BY_DRIVER: |
772f0389 IP |
2075 | if (!wiphy) |
2076 | goto out_free; | |
21636c7f LR |
2077 | treatment = reg_process_hint_driver(wiphy, reg_request); |
2078 | break; | |
b3eb7f3f | 2079 | case NL80211_REGDOM_SET_BY_COUNTRY_IE: |
772f0389 IP |
2080 | if (!wiphy) |
2081 | goto out_free; | |
b23e7a9e | 2082 | treatment = reg_process_hint_country_ie(wiphy, reg_request); |
b3eb7f3f LR |
2083 | break; |
2084 | default: | |
2085 | WARN(1, "invalid initiator %d\n", reg_request->initiator); | |
772f0389 | 2086 | goto out_free; |
b3eb7f3f LR |
2087 | } |
2088 | ||
b23e7a9e LR |
2089 | /* This is required so that the orig_* parameters are saved */ |
2090 | if (treatment == REG_REQ_ALREADY_SET && wiphy && | |
ad932f04 | 2091 | wiphy->regulatory_flags & REGULATORY_STRICT_REG) { |
b23e7a9e | 2092 | wiphy_update_regulatory(wiphy, reg_request->initiator); |
ad932f04 AN |
2093 | reg_check_channels(); |
2094 | } | |
772f0389 IP |
2095 | |
2096 | return; | |
2097 | ||
2098 | out_free: | |
c888393b | 2099 | reg_free_request(reg_request); |
fe33eb39 LR |
2100 | } |
2101 | ||
ef51fb1d AN |
2102 | static bool reg_only_self_managed_wiphys(void) |
2103 | { | |
2104 | struct cfg80211_registered_device *rdev; | |
2105 | struct wiphy *wiphy; | |
2106 | bool self_managed_found = false; | |
2107 | ||
2108 | ASSERT_RTNL(); | |
2109 | ||
2110 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) { | |
2111 | wiphy = &rdev->wiphy; | |
2112 | if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) | |
2113 | self_managed_found = true; | |
2114 | else | |
2115 | return false; | |
2116 | } | |
2117 | ||
2118 | /* make sure at least one self-managed wiphy exists */ | |
2119 | return self_managed_found; | |
2120 | } | |
2121 | ||
b2e253cf LR |
2122 | /* |
2123 | * Processes regulatory hints, this is all the NL80211_REGDOM_SET_BY_* | |
2124 | * Regulatory hints come on a first come first serve basis and we | |
2125 | * must process each one atomically. | |
2126 | */ | |
fe33eb39 | 2127 | static void reg_process_pending_hints(void) |
b0e2880b | 2128 | { |
c492db37 | 2129 | struct regulatory_request *reg_request, *lr; |
fe33eb39 | 2130 | |
c492db37 | 2131 | lr = get_last_request(); |
b0e2880b | 2132 | |
b2e253cf | 2133 | /* When last_request->processed becomes true this will be rescheduled */ |
c492db37 | 2134 | if (lr && !lr->processed) { |
96cce12f | 2135 | reg_process_hint(lr); |
5fe231e8 | 2136 | return; |
b2e253cf LR |
2137 | } |
2138 | ||
fe33eb39 | 2139 | spin_lock(®_requests_lock); |
fe33eb39 | 2140 | |
b2e253cf | 2141 | if (list_empty(®_requests_list)) { |
d951c1dd | 2142 | spin_unlock(®_requests_lock); |
5fe231e8 | 2143 | return; |
fe33eb39 | 2144 | } |
b2e253cf LR |
2145 | |
2146 | reg_request = list_first_entry(®_requests_list, | |
2147 | struct regulatory_request, | |
2148 | list); | |
2149 | list_del_init(®_request->list); | |
2150 | ||
fe33eb39 | 2151 | spin_unlock(®_requests_lock); |
b0e2880b | 2152 | |
ef51fb1d AN |
2153 | if (reg_only_self_managed_wiphys()) { |
2154 | reg_free_request(reg_request); | |
2155 | return; | |
2156 | } | |
2157 | ||
1daa37c7 | 2158 | reg_process_hint(reg_request); |
fe33eb39 LR |
2159 | } |
2160 | ||
e38f8a7a LR |
2161 | /* Processes beacon hints -- this has nothing to do with country IEs */ |
2162 | static void reg_process_pending_beacon_hints(void) | |
2163 | { | |
79c97e97 | 2164 | struct cfg80211_registered_device *rdev; |
e38f8a7a LR |
2165 | struct reg_beacon *pending_beacon, *tmp; |
2166 | ||
e38f8a7a LR |
2167 | /* This goes through the _pending_ beacon list */ |
2168 | spin_lock_bh(®_pending_beacons_lock); | |
2169 | ||
e38f8a7a LR |
2170 | list_for_each_entry_safe(pending_beacon, tmp, |
2171 | ®_pending_beacons, list) { | |
e38f8a7a LR |
2172 | list_del_init(&pending_beacon->list); |
2173 | ||
2174 | /* Applies the beacon hint to current wiphys */ | |
79c97e97 JB |
2175 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) |
2176 | wiphy_update_new_beacon(&rdev->wiphy, pending_beacon); | |
e38f8a7a LR |
2177 | |
2178 | /* Remembers the beacon hint for new wiphys or reg changes */ | |
2179 | list_add_tail(&pending_beacon->list, ®_beacon_list); | |
2180 | } | |
2181 | ||
2182 | spin_unlock_bh(®_pending_beacons_lock); | |
e38f8a7a LR |
2183 | } |
2184 | ||
b0d7aa59 JD |
2185 | static void reg_process_self_managed_hints(void) |
2186 | { | |
2187 | struct cfg80211_registered_device *rdev; | |
2188 | struct wiphy *wiphy; | |
2189 | const struct ieee80211_regdomain *tmp; | |
2190 | const struct ieee80211_regdomain *regd; | |
2191 | enum ieee80211_band band; | |
2192 | struct regulatory_request request = {}; | |
2193 | ||
2194 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) { | |
2195 | wiphy = &rdev->wiphy; | |
2196 | ||
2197 | spin_lock(®_requests_lock); | |
2198 | regd = rdev->requested_regd; | |
2199 | rdev->requested_regd = NULL; | |
2200 | spin_unlock(®_requests_lock); | |
2201 | ||
2202 | if (regd == NULL) | |
2203 | continue; | |
2204 | ||
2205 | tmp = get_wiphy_regdom(wiphy); | |
2206 | rcu_assign_pointer(wiphy->regd, regd); | |
2207 | rcu_free_regdom(tmp); | |
2208 | ||
2209 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) | |
2210 | handle_band_custom(wiphy, wiphy->bands[band], regd); | |
2211 | ||
2212 | reg_process_ht_flags(wiphy); | |
2213 | ||
2214 | request.wiphy_idx = get_wiphy_idx(wiphy); | |
2215 | request.alpha2[0] = regd->alpha2[0]; | |
2216 | request.alpha2[1] = regd->alpha2[1]; | |
2217 | request.initiator = NL80211_REGDOM_SET_BY_DRIVER; | |
2218 | ||
2219 | nl80211_send_wiphy_reg_change_event(&request); | |
2220 | } | |
2221 | ||
2222 | reg_check_channels(); | |
2223 | } | |
2224 | ||
fe33eb39 LR |
2225 | static void reg_todo(struct work_struct *work) |
2226 | { | |
5fe231e8 | 2227 | rtnl_lock(); |
fe33eb39 | 2228 | reg_process_pending_hints(); |
e38f8a7a | 2229 | reg_process_pending_beacon_hints(); |
b0d7aa59 | 2230 | reg_process_self_managed_hints(); |
5fe231e8 | 2231 | rtnl_unlock(); |
fe33eb39 LR |
2232 | } |
2233 | ||
fe33eb39 LR |
2234 | static void queue_regulatory_request(struct regulatory_request *request) |
2235 | { | |
d4f2c881 JB |
2236 | request->alpha2[0] = toupper(request->alpha2[0]); |
2237 | request->alpha2[1] = toupper(request->alpha2[1]); | |
c61029c7 | 2238 | |
fe33eb39 LR |
2239 | spin_lock(®_requests_lock); |
2240 | list_add_tail(&request->list, ®_requests_list); | |
2241 | spin_unlock(®_requests_lock); | |
2242 | ||
2243 | schedule_work(®_work); | |
2244 | } | |
2245 | ||
09d989d1 LR |
2246 | /* |
2247 | * Core regulatory hint -- happens during cfg80211_init() | |
2248 | * and when we restore regulatory settings. | |
2249 | */ | |
ba25c141 LR |
2250 | static int regulatory_hint_core(const char *alpha2) |
2251 | { | |
2252 | struct regulatory_request *request; | |
2253 | ||
1a919318 | 2254 | request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); |
ba25c141 LR |
2255 | if (!request) |
2256 | return -ENOMEM; | |
2257 | ||
2258 | request->alpha2[0] = alpha2[0]; | |
2259 | request->alpha2[1] = alpha2[1]; | |
7db90f4a | 2260 | request->initiator = NL80211_REGDOM_SET_BY_CORE; |
ba25c141 | 2261 | |
31e99729 | 2262 | queue_regulatory_request(request); |
5078b2e3 | 2263 | |
fe33eb39 | 2264 | return 0; |
ba25c141 LR |
2265 | } |
2266 | ||
fe33eb39 | 2267 | /* User hints */ |
57b5ce07 LR |
2268 | int regulatory_hint_user(const char *alpha2, |
2269 | enum nl80211_user_reg_hint_type user_reg_hint_type) | |
b2e1b302 | 2270 | { |
fe33eb39 LR |
2271 | struct regulatory_request *request; |
2272 | ||
fdc9d7b2 JB |
2273 | if (WARN_ON(!alpha2)) |
2274 | return -EINVAL; | |
b2e1b302 | 2275 | |
fe33eb39 LR |
2276 | request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); |
2277 | if (!request) | |
2278 | return -ENOMEM; | |
2279 | ||
f4173766 | 2280 | request->wiphy_idx = WIPHY_IDX_INVALID; |
fe33eb39 LR |
2281 | request->alpha2[0] = alpha2[0]; |
2282 | request->alpha2[1] = alpha2[1]; | |
e12822e1 | 2283 | request->initiator = NL80211_REGDOM_SET_BY_USER; |
57b5ce07 | 2284 | request->user_reg_hint_type = user_reg_hint_type; |
fe33eb39 LR |
2285 | |
2286 | queue_regulatory_request(request); | |
2287 | ||
2288 | return 0; | |
2289 | } | |
2290 | ||
52616f2b IP |
2291 | int regulatory_hint_indoor_user(void) |
2292 | { | |
52616f2b | 2293 | |
52616f2b | 2294 | |
0c4ddcd2 | 2295 | reg_is_indoor = true; |
52616f2b IP |
2296 | |
2297 | return 0; | |
2298 | } | |
2299 | ||
fe33eb39 LR |
2300 | /* Driver hints */ |
2301 | int regulatory_hint(struct wiphy *wiphy, const char *alpha2) | |
2302 | { | |
2303 | struct regulatory_request *request; | |
2304 | ||
fdc9d7b2 JB |
2305 | if (WARN_ON(!alpha2 || !wiphy)) |
2306 | return -EINVAL; | |
fe33eb39 | 2307 | |
4f7b9140 LR |
2308 | wiphy->regulatory_flags &= ~REGULATORY_CUSTOM_REG; |
2309 | ||
fe33eb39 LR |
2310 | request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); |
2311 | if (!request) | |
2312 | return -ENOMEM; | |
2313 | ||
2314 | request->wiphy_idx = get_wiphy_idx(wiphy); | |
2315 | ||
fe33eb39 LR |
2316 | request->alpha2[0] = alpha2[0]; |
2317 | request->alpha2[1] = alpha2[1]; | |
7db90f4a | 2318 | request->initiator = NL80211_REGDOM_SET_BY_DRIVER; |
fe33eb39 LR |
2319 | |
2320 | queue_regulatory_request(request); | |
2321 | ||
2322 | return 0; | |
b2e1b302 LR |
2323 | } |
2324 | EXPORT_SYMBOL(regulatory_hint); | |
2325 | ||
789fd033 LR |
2326 | void regulatory_hint_country_ie(struct wiphy *wiphy, enum ieee80211_band band, |
2327 | const u8 *country_ie, u8 country_ie_len) | |
3f2355cb | 2328 | { |
3f2355cb | 2329 | char alpha2[2]; |
3f2355cb | 2330 | enum environment_cap env = ENVIRON_ANY; |
db2424c5 | 2331 | struct regulatory_request *request = NULL, *lr; |
d335fe63 | 2332 | |
3f2355cb LR |
2333 | /* IE len must be evenly divisible by 2 */ |
2334 | if (country_ie_len & 0x01) | |
db2424c5 | 2335 | return; |
3f2355cb LR |
2336 | |
2337 | if (country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN) | |
db2424c5 JB |
2338 | return; |
2339 | ||
2340 | request = kzalloc(sizeof(*request), GFP_KERNEL); | |
2341 | if (!request) | |
2342 | return; | |
3f2355cb | 2343 | |
3f2355cb LR |
2344 | alpha2[0] = country_ie[0]; |
2345 | alpha2[1] = country_ie[1]; | |
2346 | ||
2347 | if (country_ie[2] == 'I') | |
2348 | env = ENVIRON_INDOOR; | |
2349 | else if (country_ie[2] == 'O') | |
2350 | env = ENVIRON_OUTDOOR; | |
2351 | ||
db2424c5 JB |
2352 | rcu_read_lock(); |
2353 | lr = get_last_request(); | |
2354 | ||
2355 | if (unlikely(!lr)) | |
2356 | goto out; | |
2357 | ||
fb1fc7ad | 2358 | /* |
8b19e6ca | 2359 | * We will run this only upon a successful connection on cfg80211. |
4b44c8bc | 2360 | * We leave conflict resolution to the workqueue, where can hold |
5fe231e8 | 2361 | * the RTNL. |
fb1fc7ad | 2362 | */ |
c492db37 JB |
2363 | if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE && |
2364 | lr->wiphy_idx != WIPHY_IDX_INVALID) | |
4b44c8bc | 2365 | goto out; |
3f2355cb | 2366 | |
fe33eb39 | 2367 | request->wiphy_idx = get_wiphy_idx(wiphy); |
4f366c5d JL |
2368 | request->alpha2[0] = alpha2[0]; |
2369 | request->alpha2[1] = alpha2[1]; | |
7db90f4a | 2370 | request->initiator = NL80211_REGDOM_SET_BY_COUNTRY_IE; |
fe33eb39 LR |
2371 | request->country_ie_env = env; |
2372 | ||
fe33eb39 | 2373 | queue_regulatory_request(request); |
db2424c5 | 2374 | request = NULL; |
3f2355cb | 2375 | out: |
db2424c5 JB |
2376 | kfree(request); |
2377 | rcu_read_unlock(); | |
3f2355cb | 2378 | } |
b2e1b302 | 2379 | |
09d989d1 LR |
2380 | static void restore_alpha2(char *alpha2, bool reset_user) |
2381 | { | |
2382 | /* indicates there is no alpha2 to consider for restoration */ | |
2383 | alpha2[0] = '9'; | |
2384 | alpha2[1] = '7'; | |
2385 | ||
2386 | /* The user setting has precedence over the module parameter */ | |
2387 | if (is_user_regdom_saved()) { | |
2388 | /* Unless we're asked to ignore it and reset it */ | |
2389 | if (reset_user) { | |
1a919318 | 2390 | REG_DBG_PRINT("Restoring regulatory settings including user preference\n"); |
09d989d1 LR |
2391 | user_alpha2[0] = '9'; |
2392 | user_alpha2[1] = '7'; | |
2393 | ||
2394 | /* | |
2395 | * If we're ignoring user settings, we still need to | |
2396 | * check the module parameter to ensure we put things | |
2397 | * back as they were for a full restore. | |
2398 | */ | |
2399 | if (!is_world_regdom(ieee80211_regdom)) { | |
1a919318 JB |
2400 | REG_DBG_PRINT("Keeping preference on module parameter ieee80211_regdom: %c%c\n", |
2401 | ieee80211_regdom[0], ieee80211_regdom[1]); | |
09d989d1 LR |
2402 | alpha2[0] = ieee80211_regdom[0]; |
2403 | alpha2[1] = ieee80211_regdom[1]; | |
2404 | } | |
2405 | } else { | |
1a919318 JB |
2406 | REG_DBG_PRINT("Restoring regulatory settings while preserving user preference for: %c%c\n", |
2407 | user_alpha2[0], user_alpha2[1]); | |
09d989d1 LR |
2408 | alpha2[0] = user_alpha2[0]; |
2409 | alpha2[1] = user_alpha2[1]; | |
2410 | } | |
2411 | } else if (!is_world_regdom(ieee80211_regdom)) { | |
1a919318 JB |
2412 | REG_DBG_PRINT("Keeping preference on module parameter ieee80211_regdom: %c%c\n", |
2413 | ieee80211_regdom[0], ieee80211_regdom[1]); | |
09d989d1 LR |
2414 | alpha2[0] = ieee80211_regdom[0]; |
2415 | alpha2[1] = ieee80211_regdom[1]; | |
2416 | } else | |
d91e41b6 | 2417 | REG_DBG_PRINT("Restoring regulatory settings\n"); |
09d989d1 LR |
2418 | } |
2419 | ||
5ce543d1 RM |
2420 | static void restore_custom_reg_settings(struct wiphy *wiphy) |
2421 | { | |
2422 | struct ieee80211_supported_band *sband; | |
2423 | enum ieee80211_band band; | |
2424 | struct ieee80211_channel *chan; | |
2425 | int i; | |
2426 | ||
2427 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) { | |
2428 | sband = wiphy->bands[band]; | |
2429 | if (!sband) | |
2430 | continue; | |
2431 | for (i = 0; i < sband->n_channels; i++) { | |
2432 | chan = &sband->channels[i]; | |
2433 | chan->flags = chan->orig_flags; | |
2434 | chan->max_antenna_gain = chan->orig_mag; | |
2435 | chan->max_power = chan->orig_mpwr; | |
899852af | 2436 | chan->beacon_found = false; |
5ce543d1 RM |
2437 | } |
2438 | } | |
2439 | } | |
2440 | ||
09d989d1 LR |
2441 | /* |
2442 | * Restoring regulatory settings involves ingoring any | |
2443 | * possibly stale country IE information and user regulatory | |
2444 | * settings if so desired, this includes any beacon hints | |
2445 | * learned as we could have traveled outside to another country | |
2446 | * after disconnection. To restore regulatory settings we do | |
2447 | * exactly what we did at bootup: | |
2448 | * | |
2449 | * - send a core regulatory hint | |
2450 | * - send a user regulatory hint if applicable | |
2451 | * | |
2452 | * Device drivers that send a regulatory hint for a specific country | |
2453 | * keep their own regulatory domain on wiphy->regd so that does does | |
2454 | * not need to be remembered. | |
2455 | */ | |
2456 | static void restore_regulatory_settings(bool reset_user) | |
2457 | { | |
2458 | char alpha2[2]; | |
cee0bec5 | 2459 | char world_alpha2[2]; |
09d989d1 | 2460 | struct reg_beacon *reg_beacon, *btmp; |
14609555 LR |
2461 | struct regulatory_request *reg_request, *tmp; |
2462 | LIST_HEAD(tmp_reg_req_list); | |
5ce543d1 | 2463 | struct cfg80211_registered_device *rdev; |
09d989d1 | 2464 | |
5fe231e8 JB |
2465 | ASSERT_RTNL(); |
2466 | ||
52616f2b IP |
2467 | reg_is_indoor = false; |
2468 | ||
2d319867 | 2469 | reset_regdomains(true, &world_regdom); |
09d989d1 LR |
2470 | restore_alpha2(alpha2, reset_user); |
2471 | ||
14609555 LR |
2472 | /* |
2473 | * If there's any pending requests we simply | |
2474 | * stash them to a temporary pending queue and | |
2475 | * add then after we've restored regulatory | |
2476 | * settings. | |
2477 | */ | |
2478 | spin_lock(®_requests_lock); | |
fea9bced JB |
2479 | list_for_each_entry_safe(reg_request, tmp, ®_requests_list, list) { |
2480 | if (reg_request->initiator != NL80211_REGDOM_SET_BY_USER) | |
2481 | continue; | |
2482 | list_move_tail(®_request->list, &tmp_reg_req_list); | |
14609555 LR |
2483 | } |
2484 | spin_unlock(®_requests_lock); | |
2485 | ||
09d989d1 LR |
2486 | /* Clear beacon hints */ |
2487 | spin_lock_bh(®_pending_beacons_lock); | |
fea9bced JB |
2488 | list_for_each_entry_safe(reg_beacon, btmp, ®_pending_beacons, list) { |
2489 | list_del(®_beacon->list); | |
2490 | kfree(reg_beacon); | |
09d989d1 LR |
2491 | } |
2492 | spin_unlock_bh(®_pending_beacons_lock); | |
2493 | ||
fea9bced JB |
2494 | list_for_each_entry_safe(reg_beacon, btmp, ®_beacon_list, list) { |
2495 | list_del(®_beacon->list); | |
2496 | kfree(reg_beacon); | |
09d989d1 LR |
2497 | } |
2498 | ||
2499 | /* First restore to the basic regulatory settings */ | |
379b82f4 JB |
2500 | world_alpha2[0] = cfg80211_world_regdom->alpha2[0]; |
2501 | world_alpha2[1] = cfg80211_world_regdom->alpha2[1]; | |
09d989d1 | 2502 | |
5ce543d1 | 2503 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) { |
b0d7aa59 JD |
2504 | if (rdev->wiphy.regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) |
2505 | continue; | |
a2f73b6c | 2506 | if (rdev->wiphy.regulatory_flags & REGULATORY_CUSTOM_REG) |
5ce543d1 RM |
2507 | restore_custom_reg_settings(&rdev->wiphy); |
2508 | } | |
2509 | ||
cee0bec5 | 2510 | regulatory_hint_core(world_alpha2); |
09d989d1 LR |
2511 | |
2512 | /* | |
2513 | * This restores the ieee80211_regdom module parameter | |
2514 | * preference or the last user requested regulatory | |
2515 | * settings, user regulatory settings takes precedence. | |
2516 | */ | |
2517 | if (is_an_alpha2(alpha2)) | |
57b5ce07 | 2518 | regulatory_hint_user(user_alpha2, NL80211_USER_REG_HINT_USER); |
09d989d1 | 2519 | |
14609555 | 2520 | spin_lock(®_requests_lock); |
11cff96c | 2521 | list_splice_tail_init(&tmp_reg_req_list, ®_requests_list); |
14609555 LR |
2522 | spin_unlock(®_requests_lock); |
2523 | ||
14609555 LR |
2524 | REG_DBG_PRINT("Kicking the queue\n"); |
2525 | ||
2526 | schedule_work(®_work); | |
2527 | } | |
09d989d1 LR |
2528 | |
2529 | void regulatory_hint_disconnect(void) | |
2530 | { | |
1a919318 | 2531 | REG_DBG_PRINT("All devices are disconnected, going to restore regulatory settings\n"); |
09d989d1 LR |
2532 | restore_regulatory_settings(false); |
2533 | } | |
2534 | ||
e38f8a7a LR |
2535 | static bool freq_is_chan_12_13_14(u16 freq) |
2536 | { | |
59eb21a6 BR |
2537 | if (freq == ieee80211_channel_to_frequency(12, IEEE80211_BAND_2GHZ) || |
2538 | freq == ieee80211_channel_to_frequency(13, IEEE80211_BAND_2GHZ) || | |
2539 | freq == ieee80211_channel_to_frequency(14, IEEE80211_BAND_2GHZ)) | |
e38f8a7a LR |
2540 | return true; |
2541 | return false; | |
2542 | } | |
2543 | ||
3ebfa6e7 LR |
2544 | static bool pending_reg_beacon(struct ieee80211_channel *beacon_chan) |
2545 | { | |
2546 | struct reg_beacon *pending_beacon; | |
2547 | ||
2548 | list_for_each_entry(pending_beacon, ®_pending_beacons, list) | |
2549 | if (beacon_chan->center_freq == | |
2550 | pending_beacon->chan.center_freq) | |
2551 | return true; | |
2552 | return false; | |
2553 | } | |
2554 | ||
e38f8a7a LR |
2555 | int regulatory_hint_found_beacon(struct wiphy *wiphy, |
2556 | struct ieee80211_channel *beacon_chan, | |
2557 | gfp_t gfp) | |
2558 | { | |
2559 | struct reg_beacon *reg_beacon; | |
3ebfa6e7 | 2560 | bool processing; |
e38f8a7a | 2561 | |
1a919318 JB |
2562 | if (beacon_chan->beacon_found || |
2563 | beacon_chan->flags & IEEE80211_CHAN_RADAR || | |
e38f8a7a | 2564 | (beacon_chan->band == IEEE80211_BAND_2GHZ && |
1a919318 | 2565 | !freq_is_chan_12_13_14(beacon_chan->center_freq))) |
e38f8a7a LR |
2566 | return 0; |
2567 | ||
3ebfa6e7 LR |
2568 | spin_lock_bh(®_pending_beacons_lock); |
2569 | processing = pending_reg_beacon(beacon_chan); | |
2570 | spin_unlock_bh(®_pending_beacons_lock); | |
2571 | ||
2572 | if (processing) | |
e38f8a7a LR |
2573 | return 0; |
2574 | ||
2575 | reg_beacon = kzalloc(sizeof(struct reg_beacon), gfp); | |
2576 | if (!reg_beacon) | |
2577 | return -ENOMEM; | |
2578 | ||
1a919318 | 2579 | REG_DBG_PRINT("Found new beacon on frequency: %d MHz (Ch %d) on %s\n", |
4113f751 LR |
2580 | beacon_chan->center_freq, |
2581 | ieee80211_frequency_to_channel(beacon_chan->center_freq), | |
2582 | wiphy_name(wiphy)); | |
2583 | ||
e38f8a7a | 2584 | memcpy(®_beacon->chan, beacon_chan, |
1a919318 | 2585 | sizeof(struct ieee80211_channel)); |
e38f8a7a LR |
2586 | |
2587 | /* | |
2588 | * Since we can be called from BH or and non-BH context | |
2589 | * we must use spin_lock_bh() | |
2590 | */ | |
2591 | spin_lock_bh(®_pending_beacons_lock); | |
2592 | list_add_tail(®_beacon->list, ®_pending_beacons); | |
2593 | spin_unlock_bh(®_pending_beacons_lock); | |
2594 | ||
2595 | schedule_work(®_work); | |
2596 | ||
2597 | return 0; | |
2598 | } | |
2599 | ||
a3d2eaf0 | 2600 | static void print_rd_rules(const struct ieee80211_regdomain *rd) |
b2e1b302 LR |
2601 | { |
2602 | unsigned int i; | |
a3d2eaf0 JB |
2603 | const struct ieee80211_reg_rule *reg_rule = NULL; |
2604 | const struct ieee80211_freq_range *freq_range = NULL; | |
2605 | const struct ieee80211_power_rule *power_rule = NULL; | |
089027e5 | 2606 | char bw[32], cac_time[32]; |
b2e1b302 | 2607 | |
089027e5 | 2608 | pr_info(" (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp), (dfs_cac_time)\n"); |
b2e1b302 LR |
2609 | |
2610 | for (i = 0; i < rd->n_reg_rules; i++) { | |
2611 | reg_rule = &rd->reg_rules[i]; | |
2612 | freq_range = ®_rule->freq_range; | |
2613 | power_rule = ®_rule->power_rule; | |
2614 | ||
b0dfd2ea JD |
2615 | if (reg_rule->flags & NL80211_RRF_AUTO_BW) |
2616 | snprintf(bw, sizeof(bw), "%d KHz, %d KHz AUTO", | |
2617 | freq_range->max_bandwidth_khz, | |
97524820 JD |
2618 | reg_get_max_bandwidth(rd, reg_rule)); |
2619 | else | |
b0dfd2ea | 2620 | snprintf(bw, sizeof(bw), "%d KHz", |
97524820 JD |
2621 | freq_range->max_bandwidth_khz); |
2622 | ||
089027e5 JD |
2623 | if (reg_rule->flags & NL80211_RRF_DFS) |
2624 | scnprintf(cac_time, sizeof(cac_time), "%u s", | |
2625 | reg_rule->dfs_cac_ms/1000); | |
2626 | else | |
2627 | scnprintf(cac_time, sizeof(cac_time), "N/A"); | |
2628 | ||
2629 | ||
fb1fc7ad LR |
2630 | /* |
2631 | * There may not be documentation for max antenna gain | |
2632 | * in certain regions | |
2633 | */ | |
b2e1b302 | 2634 | if (power_rule->max_antenna_gain) |
089027e5 | 2635 | pr_info(" (%d KHz - %d KHz @ %s), (%d mBi, %d mBm), (%s)\n", |
b2e1b302 LR |
2636 | freq_range->start_freq_khz, |
2637 | freq_range->end_freq_khz, | |
97524820 | 2638 | bw, |
b2e1b302 | 2639 | power_rule->max_antenna_gain, |
089027e5 JD |
2640 | power_rule->max_eirp, |
2641 | cac_time); | |
b2e1b302 | 2642 | else |
089027e5 | 2643 | pr_info(" (%d KHz - %d KHz @ %s), (N/A, %d mBm), (%s)\n", |
b2e1b302 LR |
2644 | freq_range->start_freq_khz, |
2645 | freq_range->end_freq_khz, | |
97524820 | 2646 | bw, |
089027e5 JD |
2647 | power_rule->max_eirp, |
2648 | cac_time); | |
b2e1b302 LR |
2649 | } |
2650 | } | |
2651 | ||
4c7d3982 | 2652 | bool reg_supported_dfs_region(enum nl80211_dfs_regions dfs_region) |
8b60b078 LR |
2653 | { |
2654 | switch (dfs_region) { | |
2655 | case NL80211_DFS_UNSET: | |
2656 | case NL80211_DFS_FCC: | |
2657 | case NL80211_DFS_ETSI: | |
2658 | case NL80211_DFS_JP: | |
2659 | return true; | |
2660 | default: | |
2661 | REG_DBG_PRINT("Ignoring uknown DFS master region: %d\n", | |
2662 | dfs_region); | |
2663 | return false; | |
2664 | } | |
2665 | } | |
2666 | ||
a3d2eaf0 | 2667 | static void print_regdomain(const struct ieee80211_regdomain *rd) |
b2e1b302 | 2668 | { |
c492db37 | 2669 | struct regulatory_request *lr = get_last_request(); |
b2e1b302 | 2670 | |
3f2355cb | 2671 | if (is_intersected_alpha2(rd->alpha2)) { |
c492db37 | 2672 | if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) { |
79c97e97 | 2673 | struct cfg80211_registered_device *rdev; |
c492db37 | 2674 | rdev = cfg80211_rdev_by_wiphy_idx(lr->wiphy_idx); |
79c97e97 | 2675 | if (rdev) { |
e9c0268f | 2676 | pr_info("Current regulatory domain updated by AP to: %c%c\n", |
79c97e97 JB |
2677 | rdev->country_ie_alpha2[0], |
2678 | rdev->country_ie_alpha2[1]); | |
3f2355cb | 2679 | } else |
e9c0268f | 2680 | pr_info("Current regulatory domain intersected:\n"); |
3f2355cb | 2681 | } else |
e9c0268f | 2682 | pr_info("Current regulatory domain intersected:\n"); |
1a919318 | 2683 | } else if (is_world_regdom(rd->alpha2)) { |
e9c0268f | 2684 | pr_info("World regulatory domain updated:\n"); |
1a919318 | 2685 | } else { |
b2e1b302 | 2686 | if (is_unknown_alpha2(rd->alpha2)) |
e9c0268f | 2687 | pr_info("Regulatory domain changed to driver built-in settings (unknown country)\n"); |
57b5ce07 | 2688 | else { |
c492db37 | 2689 | if (reg_request_cell_base(lr)) |
1a919318 | 2690 | pr_info("Regulatory domain changed to country: %c%c by Cell Station\n", |
57b5ce07 LR |
2691 | rd->alpha2[0], rd->alpha2[1]); |
2692 | else | |
1a919318 | 2693 | pr_info("Regulatory domain changed to country: %c%c\n", |
57b5ce07 LR |
2694 | rd->alpha2[0], rd->alpha2[1]); |
2695 | } | |
b2e1b302 | 2696 | } |
1a919318 | 2697 | |
3ef121b5 | 2698 | pr_info(" DFS Master region: %s", reg_dfs_region_str(rd->dfs_region)); |
b2e1b302 LR |
2699 | print_rd_rules(rd); |
2700 | } | |
2701 | ||
2df78167 | 2702 | static void print_regdomain_info(const struct ieee80211_regdomain *rd) |
b2e1b302 | 2703 | { |
e9c0268f | 2704 | pr_info("Regulatory domain: %c%c\n", rd->alpha2[0], rd->alpha2[1]); |
b2e1b302 LR |
2705 | print_rd_rules(rd); |
2706 | } | |
2707 | ||
3b9e5aca LR |
2708 | static int reg_set_rd_core(const struct ieee80211_regdomain *rd) |
2709 | { | |
2710 | if (!is_world_regdom(rd->alpha2)) | |
2711 | return -EINVAL; | |
2712 | update_world_regdomain(rd); | |
2713 | return 0; | |
2714 | } | |
2715 | ||
84721d44 LR |
2716 | static int reg_set_rd_user(const struct ieee80211_regdomain *rd, |
2717 | struct regulatory_request *user_request) | |
2718 | { | |
2719 | const struct ieee80211_regdomain *intersected_rd = NULL; | |
2720 | ||
84721d44 LR |
2721 | if (!regdom_changes(rd->alpha2)) |
2722 | return -EALREADY; | |
2723 | ||
2724 | if (!is_valid_rd(rd)) { | |
2725 | pr_err("Invalid regulatory domain detected:\n"); | |
2726 | print_regdomain_info(rd); | |
2727 | return -EINVAL; | |
2728 | } | |
2729 | ||
2730 | if (!user_request->intersect) { | |
2731 | reset_regdomains(false, rd); | |
2732 | return 0; | |
2733 | } | |
2734 | ||
2735 | intersected_rd = regdom_intersect(rd, get_cfg80211_regdom()); | |
2736 | if (!intersected_rd) | |
2737 | return -EINVAL; | |
2738 | ||
2739 | kfree(rd); | |
2740 | rd = NULL; | |
2741 | reset_regdomains(false, intersected_rd); | |
2742 | ||
2743 | return 0; | |
2744 | } | |
2745 | ||
f5fe3247 LR |
2746 | static int reg_set_rd_driver(const struct ieee80211_regdomain *rd, |
2747 | struct regulatory_request *driver_request) | |
b2e1b302 | 2748 | { |
e9763c3c | 2749 | const struct ieee80211_regdomain *regd; |
9c96477d | 2750 | const struct ieee80211_regdomain *intersected_rd = NULL; |
f5fe3247 | 2751 | const struct ieee80211_regdomain *tmp; |
806a9e39 | 2752 | struct wiphy *request_wiphy; |
6913b49a | 2753 | |
f5fe3247 | 2754 | if (is_world_regdom(rd->alpha2)) |
b2e1b302 LR |
2755 | return -EINVAL; |
2756 | ||
f5fe3247 LR |
2757 | if (!regdom_changes(rd->alpha2)) |
2758 | return -EALREADY; | |
b2e1b302 | 2759 | |
8375af3b | 2760 | if (!is_valid_rd(rd)) { |
e9c0268f | 2761 | pr_err("Invalid regulatory domain detected:\n"); |
8375af3b LR |
2762 | print_regdomain_info(rd); |
2763 | return -EINVAL; | |
b2e1b302 LR |
2764 | } |
2765 | ||
f5fe3247 LR |
2766 | request_wiphy = wiphy_idx_to_wiphy(driver_request->wiphy_idx); |
2767 | if (!request_wiphy) { | |
845f3351 SD |
2768 | queue_delayed_work(system_power_efficient_wq, |
2769 | ®_timeout, 0); | |
de3584bd JB |
2770 | return -ENODEV; |
2771 | } | |
806a9e39 | 2772 | |
f5fe3247 | 2773 | if (!driver_request->intersect) { |
558f6d32 LR |
2774 | if (request_wiphy->regd) |
2775 | return -EALREADY; | |
3e0c3ff3 | 2776 | |
e9763c3c JB |
2777 | regd = reg_copy_regd(rd); |
2778 | if (IS_ERR(regd)) | |
2779 | return PTR_ERR(regd); | |
3e0c3ff3 | 2780 | |
458f4f9e | 2781 | rcu_assign_pointer(request_wiphy->regd, regd); |
379b82f4 | 2782 | reset_regdomains(false, rd); |
b8295acd LR |
2783 | return 0; |
2784 | } | |
2785 | ||
f5fe3247 LR |
2786 | intersected_rd = regdom_intersect(rd, get_cfg80211_regdom()); |
2787 | if (!intersected_rd) | |
2788 | return -EINVAL; | |
b8295acd | 2789 | |
f5fe3247 LR |
2790 | /* |
2791 | * We can trash what CRDA provided now. | |
2792 | * However if a driver requested this specific regulatory | |
2793 | * domain we keep it for its private use | |
2794 | */ | |
2795 | tmp = get_wiphy_regdom(request_wiphy); | |
2796 | rcu_assign_pointer(request_wiphy->regd, rd); | |
2797 | rcu_free_regdom(tmp); | |
b8295acd | 2798 | |
f5fe3247 | 2799 | rd = NULL; |
b7566fc3 | 2800 | |
f5fe3247 | 2801 | reset_regdomains(false, intersected_rd); |
3e0c3ff3 | 2802 | |
f5fe3247 LR |
2803 | return 0; |
2804 | } | |
2805 | ||
01992406 LR |
2806 | static int reg_set_rd_country_ie(const struct ieee80211_regdomain *rd, |
2807 | struct regulatory_request *country_ie_request) | |
f5fe3247 LR |
2808 | { |
2809 | struct wiphy *request_wiphy; | |
b8295acd | 2810 | |
f5fe3247 LR |
2811 | if (!is_alpha2_set(rd->alpha2) && !is_an_alpha2(rd->alpha2) && |
2812 | !is_unknown_alpha2(rd->alpha2)) | |
2813 | return -EINVAL; | |
b8295acd | 2814 | |
f5fe3247 LR |
2815 | /* |
2816 | * Lets only bother proceeding on the same alpha2 if the current | |
2817 | * rd is non static (it means CRDA was present and was used last) | |
2818 | * and the pending request came in from a country IE | |
2819 | */ | |
2820 | ||
2821 | if (!is_valid_rd(rd)) { | |
2822 | pr_err("Invalid regulatory domain detected:\n"); | |
2823 | print_regdomain_info(rd); | |
2824 | return -EINVAL; | |
9c96477d LR |
2825 | } |
2826 | ||
01992406 | 2827 | request_wiphy = wiphy_idx_to_wiphy(country_ie_request->wiphy_idx); |
f5fe3247 | 2828 | if (!request_wiphy) { |
845f3351 SD |
2829 | queue_delayed_work(system_power_efficient_wq, |
2830 | ®_timeout, 0); | |
f5fe3247 LR |
2831 | return -ENODEV; |
2832 | } | |
b2e1b302 | 2833 | |
01992406 | 2834 | if (country_ie_request->intersect) |
f5fe3247 LR |
2835 | return -EINVAL; |
2836 | ||
2837 | reset_regdomains(false, rd); | |
2838 | return 0; | |
2839 | } | |
b2e1b302 | 2840 | |
fb1fc7ad LR |
2841 | /* |
2842 | * Use this call to set the current regulatory domain. Conflicts with | |
b2e1b302 | 2843 | * multiple drivers can be ironed out later. Caller must've already |
458f4f9e | 2844 | * kmalloc'd the rd structure. |
fb1fc7ad | 2845 | */ |
a3d2eaf0 | 2846 | int set_regdom(const struct ieee80211_regdomain *rd) |
b2e1b302 | 2847 | { |
c492db37 | 2848 | struct regulatory_request *lr; |
092008ab | 2849 | bool user_reset = false; |
b2e1b302 LR |
2850 | int r; |
2851 | ||
3b9e5aca LR |
2852 | if (!reg_is_valid_request(rd->alpha2)) { |
2853 | kfree(rd); | |
2854 | return -EINVAL; | |
2855 | } | |
2856 | ||
c492db37 | 2857 | lr = get_last_request(); |
abc7381b | 2858 | |
b2e1b302 | 2859 | /* Note that this doesn't update the wiphys, this is done below */ |
3b9e5aca LR |
2860 | switch (lr->initiator) { |
2861 | case NL80211_REGDOM_SET_BY_CORE: | |
2862 | r = reg_set_rd_core(rd); | |
2863 | break; | |
2864 | case NL80211_REGDOM_SET_BY_USER: | |
84721d44 | 2865 | r = reg_set_rd_user(rd, lr); |
092008ab | 2866 | user_reset = true; |
84721d44 | 2867 | break; |
3b9e5aca | 2868 | case NL80211_REGDOM_SET_BY_DRIVER: |
f5fe3247 LR |
2869 | r = reg_set_rd_driver(rd, lr); |
2870 | break; | |
3b9e5aca | 2871 | case NL80211_REGDOM_SET_BY_COUNTRY_IE: |
01992406 | 2872 | r = reg_set_rd_country_ie(rd, lr); |
3b9e5aca LR |
2873 | break; |
2874 | default: | |
2875 | WARN(1, "invalid initiator %d\n", lr->initiator); | |
2876 | return -EINVAL; | |
2877 | } | |
2878 | ||
d2372b31 | 2879 | if (r) { |
092008ab JD |
2880 | switch (r) { |
2881 | case -EALREADY: | |
95908535 | 2882 | reg_set_request_processed(); |
092008ab JD |
2883 | break; |
2884 | default: | |
2885 | /* Back to world regulatory in case of errors */ | |
2886 | restore_regulatory_settings(user_reset); | |
2887 | } | |
95908535 | 2888 | |
d2372b31 | 2889 | kfree(rd); |
38fd2143 | 2890 | return r; |
d2372b31 | 2891 | } |
b2e1b302 | 2892 | |
b2e1b302 | 2893 | /* This would make this whole thing pointless */ |
38fd2143 JB |
2894 | if (WARN_ON(!lr->intersect && rd != get_cfg80211_regdom())) |
2895 | return -EINVAL; | |
b2e1b302 LR |
2896 | |
2897 | /* update all wiphys now with the new established regulatory domain */ | |
c492db37 | 2898 | update_all_wiphy_regulatory(lr->initiator); |
b2e1b302 | 2899 | |
458f4f9e | 2900 | print_regdomain(get_cfg80211_regdom()); |
b2e1b302 | 2901 | |
c492db37 | 2902 | nl80211_send_reg_change_event(lr); |
73d54c9e | 2903 | |
b2e253cf LR |
2904 | reg_set_request_processed(); |
2905 | ||
38fd2143 | 2906 | return 0; |
b2e1b302 LR |
2907 | } |
2908 | ||
2c3e861c AN |
2909 | static int __regulatory_set_wiphy_regd(struct wiphy *wiphy, |
2910 | struct ieee80211_regdomain *rd) | |
b0d7aa59 JD |
2911 | { |
2912 | const struct ieee80211_regdomain *regd; | |
2913 | const struct ieee80211_regdomain *prev_regd; | |
2914 | struct cfg80211_registered_device *rdev; | |
2915 | ||
2916 | if (WARN_ON(!wiphy || !rd)) | |
2917 | return -EINVAL; | |
2918 | ||
2919 | if (WARN(!(wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED), | |
2920 | "wiphy should have REGULATORY_WIPHY_SELF_MANAGED\n")) | |
2921 | return -EPERM; | |
2922 | ||
2923 | if (WARN(!is_valid_rd(rd), "Invalid regulatory domain detected\n")) { | |
2924 | print_regdomain_info(rd); | |
2925 | return -EINVAL; | |
2926 | } | |
2927 | ||
2928 | regd = reg_copy_regd(rd); | |
2929 | if (IS_ERR(regd)) | |
2930 | return PTR_ERR(regd); | |
2931 | ||
2932 | rdev = wiphy_to_rdev(wiphy); | |
2933 | ||
2934 | spin_lock(®_requests_lock); | |
2935 | prev_regd = rdev->requested_regd; | |
2936 | rdev->requested_regd = regd; | |
2937 | spin_unlock(®_requests_lock); | |
2938 | ||
2939 | kfree(prev_regd); | |
2c3e861c AN |
2940 | return 0; |
2941 | } | |
2942 | ||
2943 | int regulatory_set_wiphy_regd(struct wiphy *wiphy, | |
2944 | struct ieee80211_regdomain *rd) | |
2945 | { | |
2946 | int ret = __regulatory_set_wiphy_regd(wiphy, rd); | |
2947 | ||
2948 | if (ret) | |
2949 | return ret; | |
b0d7aa59 JD |
2950 | |
2951 | schedule_work(®_work); | |
2952 | return 0; | |
2953 | } | |
2954 | EXPORT_SYMBOL(regulatory_set_wiphy_regd); | |
2955 | ||
2c3e861c AN |
2956 | int regulatory_set_wiphy_regd_sync_rtnl(struct wiphy *wiphy, |
2957 | struct ieee80211_regdomain *rd) | |
2958 | { | |
2959 | int ret; | |
2960 | ||
2961 | ASSERT_RTNL(); | |
2962 | ||
2963 | ret = __regulatory_set_wiphy_regd(wiphy, rd); | |
2964 | if (ret) | |
2965 | return ret; | |
2966 | ||
2967 | /* process the request immediately */ | |
2968 | reg_process_self_managed_hints(); | |
2969 | return 0; | |
2970 | } | |
2971 | EXPORT_SYMBOL(regulatory_set_wiphy_regd_sync_rtnl); | |
2972 | ||
57b5ce07 LR |
2973 | void wiphy_regulatory_register(struct wiphy *wiphy) |
2974 | { | |
23df0b73 AN |
2975 | struct regulatory_request *lr; |
2976 | ||
b0d7aa59 JD |
2977 | /* self-managed devices ignore external hints */ |
2978 | if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) | |
2979 | wiphy->regulatory_flags |= REGULATORY_DISABLE_BEACON_HINTS | | |
2980 | REGULATORY_COUNTRY_IE_IGNORE; | |
2981 | ||
57b5ce07 LR |
2982 | if (!reg_dev_ignore_cell_hint(wiphy)) |
2983 | reg_num_devs_support_basehint++; | |
2984 | ||
23df0b73 AN |
2985 | lr = get_last_request(); |
2986 | wiphy_update_regulatory(wiphy, lr->initiator); | |
57b5ce07 LR |
2987 | } |
2988 | ||
bfead080 | 2989 | void wiphy_regulatory_deregister(struct wiphy *wiphy) |
3f2355cb | 2990 | { |
0ad8acaf | 2991 | struct wiphy *request_wiphy = NULL; |
c492db37 | 2992 | struct regulatory_request *lr; |
761cf7ec | 2993 | |
c492db37 | 2994 | lr = get_last_request(); |
abc7381b | 2995 | |
57b5ce07 LR |
2996 | if (!reg_dev_ignore_cell_hint(wiphy)) |
2997 | reg_num_devs_support_basehint--; | |
2998 | ||
458f4f9e | 2999 | rcu_free_regdom(get_wiphy_regdom(wiphy)); |
34dd886c | 3000 | RCU_INIT_POINTER(wiphy->regd, NULL); |
0ef9ccdd | 3001 | |
c492db37 JB |
3002 | if (lr) |
3003 | request_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx); | |
806a9e39 | 3004 | |
0ef9ccdd | 3005 | if (!request_wiphy || request_wiphy != wiphy) |
38fd2143 | 3006 | return; |
0ef9ccdd | 3007 | |
c492db37 JB |
3008 | lr->wiphy_idx = WIPHY_IDX_INVALID; |
3009 | lr->country_ie_env = ENVIRON_ANY; | |
3f2355cb LR |
3010 | } |
3011 | ||
a90c7a31 LR |
3012 | static void reg_timeout_work(struct work_struct *work) |
3013 | { | |
1a919318 | 3014 | REG_DBG_PRINT("Timeout while waiting for CRDA to reply, restoring regulatory settings\n"); |
f77b86d7 | 3015 | rtnl_lock(); |
a90c7a31 | 3016 | restore_regulatory_settings(true); |
f77b86d7 | 3017 | rtnl_unlock(); |
a90c7a31 LR |
3018 | } |
3019 | ||
174e0cd2 IP |
3020 | /* |
3021 | * See http://www.fcc.gov/document/5-ghz-unlicensed-spectrum-unii, for | |
3022 | * UNII band definitions | |
3023 | */ | |
3024 | int cfg80211_get_unii(int freq) | |
3025 | { | |
3026 | /* UNII-1 */ | |
3027 | if (freq >= 5150 && freq <= 5250) | |
3028 | return 0; | |
3029 | ||
3030 | /* UNII-2A */ | |
3031 | if (freq > 5250 && freq <= 5350) | |
3032 | return 1; | |
3033 | ||
3034 | /* UNII-2B */ | |
3035 | if (freq > 5350 && freq <= 5470) | |
3036 | return 2; | |
3037 | ||
3038 | /* UNII-2C */ | |
3039 | if (freq > 5470 && freq <= 5725) | |
3040 | return 3; | |
3041 | ||
3042 | /* UNII-3 */ | |
3043 | if (freq > 5725 && freq <= 5825) | |
3044 | return 4; | |
3045 | ||
3046 | return -EINVAL; | |
3047 | } | |
3048 | ||
c8866e55 IP |
3049 | bool regulatory_indoor_allowed(void) |
3050 | { | |
3051 | return reg_is_indoor; | |
3052 | } | |
3053 | ||
2fcc9f73 | 3054 | int __init regulatory_init(void) |
b2e1b302 | 3055 | { |
bcf4f99b | 3056 | int err = 0; |
734366de | 3057 | |
b2e1b302 LR |
3058 | reg_pdev = platform_device_register_simple("regulatory", 0, NULL, 0); |
3059 | if (IS_ERR(reg_pdev)) | |
3060 | return PTR_ERR(reg_pdev); | |
734366de | 3061 | |
fe33eb39 | 3062 | spin_lock_init(®_requests_lock); |
e38f8a7a | 3063 | spin_lock_init(®_pending_beacons_lock); |
fe33eb39 | 3064 | |
80007efe LR |
3065 | reg_regdb_size_check(); |
3066 | ||
458f4f9e | 3067 | rcu_assign_pointer(cfg80211_regdomain, cfg80211_world_regdom); |
734366de | 3068 | |
09d989d1 LR |
3069 | user_alpha2[0] = '9'; |
3070 | user_alpha2[1] = '7'; | |
3071 | ||
ae9e4b0d | 3072 | /* We always try to get an update for the static regdomain */ |
458f4f9e | 3073 | err = regulatory_hint_core(cfg80211_world_regdom->alpha2); |
ba25c141 | 3074 | if (err) { |
bcf4f99b LR |
3075 | if (err == -ENOMEM) |
3076 | return err; | |
3077 | /* | |
3078 | * N.B. kobject_uevent_env() can fail mainly for when we're out | |
3079 | * memory which is handled and propagated appropriately above | |
3080 | * but it can also fail during a netlink_broadcast() or during | |
3081 | * early boot for call_usermodehelper(). For now treat these | |
3082 | * errors as non-fatal. | |
3083 | */ | |
e9c0268f | 3084 | pr_err("kobject_uevent_env() was unable to call CRDA during init\n"); |
bcf4f99b | 3085 | } |
734366de | 3086 | |
ae9e4b0d LR |
3087 | /* |
3088 | * Finally, if the user set the module parameter treat it | |
3089 | * as a user hint. | |
3090 | */ | |
3091 | if (!is_world_regdom(ieee80211_regdom)) | |
57b5ce07 LR |
3092 | regulatory_hint_user(ieee80211_regdom, |
3093 | NL80211_USER_REG_HINT_USER); | |
ae9e4b0d | 3094 | |
b2e1b302 LR |
3095 | return 0; |
3096 | } | |
3097 | ||
1a919318 | 3098 | void regulatory_exit(void) |
b2e1b302 | 3099 | { |
fe33eb39 | 3100 | struct regulatory_request *reg_request, *tmp; |
e38f8a7a | 3101 | struct reg_beacon *reg_beacon, *btmp; |
fe33eb39 LR |
3102 | |
3103 | cancel_work_sync(®_work); | |
a90c7a31 | 3104 | cancel_delayed_work_sync(®_timeout); |
ad932f04 | 3105 | cancel_delayed_work_sync(®_check_chans); |
fe33eb39 | 3106 | |
9027b149 | 3107 | /* Lock to suppress warnings */ |
38fd2143 | 3108 | rtnl_lock(); |
379b82f4 | 3109 | reset_regdomains(true, NULL); |
38fd2143 | 3110 | rtnl_unlock(); |
734366de | 3111 | |
58ebacc6 | 3112 | dev_set_uevent_suppress(®_pdev->dev, true); |
f6037d09 | 3113 | |
b2e1b302 | 3114 | platform_device_unregister(reg_pdev); |
734366de | 3115 | |
fea9bced JB |
3116 | list_for_each_entry_safe(reg_beacon, btmp, ®_pending_beacons, list) { |
3117 | list_del(®_beacon->list); | |
3118 | kfree(reg_beacon); | |
e38f8a7a | 3119 | } |
e38f8a7a | 3120 | |
fea9bced JB |
3121 | list_for_each_entry_safe(reg_beacon, btmp, ®_beacon_list, list) { |
3122 | list_del(®_beacon->list); | |
3123 | kfree(reg_beacon); | |
e38f8a7a LR |
3124 | } |
3125 | ||
fea9bced JB |
3126 | list_for_each_entry_safe(reg_request, tmp, ®_requests_list, list) { |
3127 | list_del(®_request->list); | |
3128 | kfree(reg_request); | |
fe33eb39 | 3129 | } |
8318d78a | 3130 | } |