Commit | Line | Data |
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8318d78a JB |
1 | /* |
2 | * Copyright 2002-2005, Instant802 Networks, Inc. | |
3 | * Copyright 2005-2006, Devicescape Software, Inc. | |
4 | * Copyright 2007 Johannes Berg <johannes@sipsolutions.net> | |
3b77d5ec | 5 | * Copyright 2008-2011 Luis R. Rodriguez <mcgrof@qca.qualcomm.com> |
2740f0cf | 6 | * Copyright 2013-2014 Intel Mobile Communications GmbH |
8318d78a | 7 | * |
3b77d5ec LR |
8 | * Permission to use, copy, modify, and/or distribute this software for any |
9 | * purpose with or without fee is hereby granted, provided that the above | |
10 | * copyright notice and this permission notice appear in all copies. | |
11 | * | |
12 | * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES | |
13 | * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF | |
14 | * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR | |
15 | * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES | |
16 | * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN | |
17 | * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF | |
18 | * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. | |
8318d78a JB |
19 | */ |
20 | ||
3b77d5ec | 21 | |
b2e1b302 LR |
22 | /** |
23 | * DOC: Wireless regulatory infrastructure | |
8318d78a JB |
24 | * |
25 | * The usual implementation is for a driver to read a device EEPROM to | |
26 | * determine which regulatory domain it should be operating under, then | |
27 | * looking up the allowable channels in a driver-local table and finally | |
28 | * registering those channels in the wiphy structure. | |
29 | * | |
b2e1b302 LR |
30 | * Another set of compliance enforcement is for drivers to use their |
31 | * own compliance limits which can be stored on the EEPROM. The host | |
32 | * driver or firmware may ensure these are used. | |
33 | * | |
34 | * In addition to all this we provide an extra layer of regulatory | |
35 | * conformance. For drivers which do not have any regulatory | |
36 | * information CRDA provides the complete regulatory solution. | |
37 | * For others it provides a community effort on further restrictions | |
38 | * to enhance compliance. | |
39 | * | |
40 | * Note: When number of rules --> infinity we will not be able to | |
41 | * index on alpha2 any more, instead we'll probably have to | |
42 | * rely on some SHA1 checksum of the regdomain for example. | |
43 | * | |
8318d78a | 44 | */ |
e9c0268f JP |
45 | |
46 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt | |
47 | ||
8318d78a | 48 | #include <linux/kernel.h> |
bc3b2d7f | 49 | #include <linux/export.h> |
5a0e3ad6 | 50 | #include <linux/slab.h> |
b2e1b302 | 51 | #include <linux/list.h> |
c61029c7 | 52 | #include <linux/ctype.h> |
b2e1b302 LR |
53 | #include <linux/nl80211.h> |
54 | #include <linux/platform_device.h> | |
d9b93842 | 55 | #include <linux/moduleparam.h> |
b2e1b302 | 56 | #include <net/cfg80211.h> |
8318d78a | 57 | #include "core.h" |
b2e1b302 | 58 | #include "reg.h" |
ad932f04 | 59 | #include "rdev-ops.h" |
3b377ea9 | 60 | #include "regdb.h" |
73d54c9e | 61 | #include "nl80211.h" |
8318d78a | 62 | |
4113f751 | 63 | #ifdef CONFIG_CFG80211_REG_DEBUG |
12c5ffb5 JP |
64 | #define REG_DBG_PRINT(format, args...) \ |
65 | printk(KERN_DEBUG pr_fmt(format), ##args) | |
4113f751 | 66 | #else |
8271195e | 67 | #define REG_DBG_PRINT(args...) |
4113f751 LR |
68 | #endif |
69 | ||
ad932f04 AN |
70 | /* |
71 | * Grace period we give before making sure all current interfaces reside on | |
72 | * channels allowed by the current regulatory domain. | |
73 | */ | |
74 | #define REG_ENFORCE_GRACE_MS 60000 | |
75 | ||
52616f2b IP |
76 | /** |
77 | * enum reg_request_treatment - regulatory request treatment | |
78 | * | |
79 | * @REG_REQ_OK: continue processing the regulatory request | |
80 | * @REG_REQ_IGNORE: ignore the regulatory request | |
81 | * @REG_REQ_INTERSECT: the regulatory domain resulting from this request should | |
82 | * be intersected with the current one. | |
83 | * @REG_REQ_ALREADY_SET: the regulatory request will not change the current | |
84 | * regulatory settings, and no further processing is required. | |
52616f2b | 85 | */ |
2f92212b JB |
86 | enum reg_request_treatment { |
87 | REG_REQ_OK, | |
88 | REG_REQ_IGNORE, | |
89 | REG_REQ_INTERSECT, | |
90 | REG_REQ_ALREADY_SET, | |
91 | }; | |
92 | ||
a042994d LR |
93 | static struct regulatory_request core_request_world = { |
94 | .initiator = NL80211_REGDOM_SET_BY_CORE, | |
95 | .alpha2[0] = '0', | |
96 | .alpha2[1] = '0', | |
97 | .intersect = false, | |
98 | .processed = true, | |
99 | .country_ie_env = ENVIRON_ANY, | |
100 | }; | |
101 | ||
38fd2143 JB |
102 | /* |
103 | * Receipt of information from last regulatory request, | |
104 | * protected by RTNL (and can be accessed with RCU protection) | |
105 | */ | |
c492db37 | 106 | static struct regulatory_request __rcu *last_request = |
cec3f0ed | 107 | (void __force __rcu *)&core_request_world; |
734366de | 108 | |
b2e1b302 LR |
109 | /* To trigger userspace events */ |
110 | static struct platform_device *reg_pdev; | |
8318d78a | 111 | |
fb1fc7ad LR |
112 | /* |
113 | * Central wireless core regulatory domains, we only need two, | |
734366de | 114 | * the current one and a world regulatory domain in case we have no |
e8da2bb4 | 115 | * information to give us an alpha2. |
38fd2143 | 116 | * (protected by RTNL, can be read under RCU) |
fb1fc7ad | 117 | */ |
458f4f9e | 118 | const struct ieee80211_regdomain __rcu *cfg80211_regdomain; |
734366de | 119 | |
57b5ce07 LR |
120 | /* |
121 | * Number of devices that registered to the core | |
122 | * that support cellular base station regulatory hints | |
38fd2143 | 123 | * (protected by RTNL) |
57b5ce07 LR |
124 | */ |
125 | static int reg_num_devs_support_basehint; | |
126 | ||
52616f2b IP |
127 | /* |
128 | * State variable indicating if the platform on which the devices | |
129 | * are attached is operating in an indoor environment. The state variable | |
130 | * is relevant for all registered devices. | |
52616f2b IP |
131 | */ |
132 | static bool reg_is_indoor; | |
05050753 I |
133 | static spinlock_t reg_indoor_lock; |
134 | ||
135 | /* Used to track the userspace process controlling the indoor setting */ | |
136 | static u32 reg_is_indoor_portid; | |
52616f2b | 137 | |
458f4f9e JB |
138 | static const struct ieee80211_regdomain *get_cfg80211_regdom(void) |
139 | { | |
38fd2143 | 140 | return rtnl_dereference(cfg80211_regdomain); |
458f4f9e JB |
141 | } |
142 | ||
ad30ca2c | 143 | const struct ieee80211_regdomain *get_wiphy_regdom(struct wiphy *wiphy) |
458f4f9e | 144 | { |
38fd2143 | 145 | return rtnl_dereference(wiphy->regd); |
458f4f9e JB |
146 | } |
147 | ||
3ef121b5 LR |
148 | static const char *reg_dfs_region_str(enum nl80211_dfs_regions dfs_region) |
149 | { | |
150 | switch (dfs_region) { | |
151 | case NL80211_DFS_UNSET: | |
152 | return "unset"; | |
153 | case NL80211_DFS_FCC: | |
154 | return "FCC"; | |
155 | case NL80211_DFS_ETSI: | |
156 | return "ETSI"; | |
157 | case NL80211_DFS_JP: | |
158 | return "JP"; | |
159 | } | |
160 | return "Unknown"; | |
161 | } | |
162 | ||
6c474799 LR |
163 | enum nl80211_dfs_regions reg_get_dfs_region(struct wiphy *wiphy) |
164 | { | |
165 | const struct ieee80211_regdomain *regd = NULL; | |
166 | const struct ieee80211_regdomain *wiphy_regd = NULL; | |
167 | ||
168 | regd = get_cfg80211_regdom(); | |
169 | if (!wiphy) | |
170 | goto out; | |
171 | ||
172 | wiphy_regd = get_wiphy_regdom(wiphy); | |
173 | if (!wiphy_regd) | |
174 | goto out; | |
175 | ||
176 | if (wiphy_regd->dfs_region == regd->dfs_region) | |
177 | goto out; | |
178 | ||
179 | REG_DBG_PRINT("%s: device specific dfs_region " | |
180 | "(%s) disagrees with cfg80211's " | |
181 | "central dfs_region (%s)\n", | |
182 | dev_name(&wiphy->dev), | |
183 | reg_dfs_region_str(wiphy_regd->dfs_region), | |
184 | reg_dfs_region_str(regd->dfs_region)); | |
185 | ||
186 | out: | |
187 | return regd->dfs_region; | |
188 | } | |
189 | ||
458f4f9e JB |
190 | static void rcu_free_regdom(const struct ieee80211_regdomain *r) |
191 | { | |
192 | if (!r) | |
193 | return; | |
194 | kfree_rcu((struct ieee80211_regdomain *)r, rcu_head); | |
195 | } | |
196 | ||
c492db37 JB |
197 | static struct regulatory_request *get_last_request(void) |
198 | { | |
38fd2143 | 199 | return rcu_dereference_rtnl(last_request); |
c492db37 JB |
200 | } |
201 | ||
e38f8a7a | 202 | /* Used to queue up regulatory hints */ |
fe33eb39 LR |
203 | static LIST_HEAD(reg_requests_list); |
204 | static spinlock_t reg_requests_lock; | |
205 | ||
e38f8a7a LR |
206 | /* Used to queue up beacon hints for review */ |
207 | static LIST_HEAD(reg_pending_beacons); | |
208 | static spinlock_t reg_pending_beacons_lock; | |
209 | ||
210 | /* Used to keep track of processed beacon hints */ | |
211 | static LIST_HEAD(reg_beacon_list); | |
212 | ||
213 | struct reg_beacon { | |
214 | struct list_head list; | |
215 | struct ieee80211_channel chan; | |
216 | }; | |
217 | ||
ad932f04 AN |
218 | static void reg_check_chans_work(struct work_struct *work); |
219 | static DECLARE_DELAYED_WORK(reg_check_chans, reg_check_chans_work); | |
220 | ||
f333a7a2 LR |
221 | static void reg_todo(struct work_struct *work); |
222 | static DECLARE_WORK(reg_work, reg_todo); | |
223 | ||
a90c7a31 LR |
224 | static void reg_timeout_work(struct work_struct *work); |
225 | static DECLARE_DELAYED_WORK(reg_timeout, reg_timeout_work); | |
226 | ||
734366de JB |
227 | /* We keep a static world regulatory domain in case of the absence of CRDA */ |
228 | static const struct ieee80211_regdomain world_regdom = { | |
90cdc6df | 229 | .n_reg_rules = 6, |
734366de JB |
230 | .alpha2 = "00", |
231 | .reg_rules = { | |
68798a62 LR |
232 | /* IEEE 802.11b/g, channels 1..11 */ |
233 | REG_RULE(2412-10, 2462+10, 40, 6, 20, 0), | |
43c771a1 JB |
234 | /* IEEE 802.11b/g, channels 12..13. */ |
235 | REG_RULE(2467-10, 2472+10, 40, 6, 20, | |
8fe02e16 | 236 | NL80211_RRF_NO_IR), |
611b6a82 LR |
237 | /* IEEE 802.11 channel 14 - Only JP enables |
238 | * this and for 802.11b only */ | |
239 | REG_RULE(2484-10, 2484+10, 20, 6, 20, | |
8fe02e16 | 240 | NL80211_RRF_NO_IR | |
611b6a82 LR |
241 | NL80211_RRF_NO_OFDM), |
242 | /* IEEE 802.11a, channel 36..48 */ | |
131a19bc | 243 | REG_RULE(5180-10, 5240+10, 160, 6, 20, |
8fe02e16 | 244 | NL80211_RRF_NO_IR), |
3fc71f77 | 245 | |
131a19bc JB |
246 | /* IEEE 802.11a, channel 52..64 - DFS required */ |
247 | REG_RULE(5260-10, 5320+10, 160, 6, 20, | |
8fe02e16 | 248 | NL80211_RRF_NO_IR | |
131a19bc JB |
249 | NL80211_RRF_DFS), |
250 | ||
251 | /* IEEE 802.11a, channel 100..144 - DFS required */ | |
252 | REG_RULE(5500-10, 5720+10, 160, 6, 20, | |
8fe02e16 | 253 | NL80211_RRF_NO_IR | |
131a19bc | 254 | NL80211_RRF_DFS), |
3fc71f77 LR |
255 | |
256 | /* IEEE 802.11a, channel 149..165 */ | |
8ab9d85c | 257 | REG_RULE(5745-10, 5825+10, 80, 6, 20, |
8fe02e16 | 258 | NL80211_RRF_NO_IR), |
90cdc6df VK |
259 | |
260 | /* IEEE 802.11ad (60gHz), channels 1..3 */ | |
261 | REG_RULE(56160+2160*1-1080, 56160+2160*3+1080, 2160, 0, 0, 0), | |
734366de JB |
262 | } |
263 | }; | |
264 | ||
38fd2143 | 265 | /* protected by RTNL */ |
a3d2eaf0 JB |
266 | static const struct ieee80211_regdomain *cfg80211_world_regdom = |
267 | &world_regdom; | |
734366de | 268 | |
6ee7d330 | 269 | static char *ieee80211_regdom = "00"; |
09d989d1 | 270 | static char user_alpha2[2]; |
6ee7d330 | 271 | |
734366de JB |
272 | module_param(ieee80211_regdom, charp, 0444); |
273 | MODULE_PARM_DESC(ieee80211_regdom, "IEEE 802.11 regulatory domain code"); | |
274 | ||
c888393b | 275 | static void reg_free_request(struct regulatory_request *request) |
5ad6ef5e | 276 | { |
c888393b AN |
277 | if (request != get_last_request()) |
278 | kfree(request); | |
279 | } | |
280 | ||
281 | static void reg_free_last_request(void) | |
282 | { | |
283 | struct regulatory_request *lr = get_last_request(); | |
284 | ||
5ad6ef5e LR |
285 | if (lr != &core_request_world && lr) |
286 | kfree_rcu(lr, rcu_head); | |
287 | } | |
288 | ||
05f1a3ea LR |
289 | static void reg_update_last_request(struct regulatory_request *request) |
290 | { | |
255e25b0 LR |
291 | struct regulatory_request *lr; |
292 | ||
293 | lr = get_last_request(); | |
294 | if (lr == request) | |
295 | return; | |
296 | ||
c888393b | 297 | reg_free_last_request(); |
05f1a3ea LR |
298 | rcu_assign_pointer(last_request, request); |
299 | } | |
300 | ||
379b82f4 JB |
301 | static void reset_regdomains(bool full_reset, |
302 | const struct ieee80211_regdomain *new_regdom) | |
734366de | 303 | { |
458f4f9e JB |
304 | const struct ieee80211_regdomain *r; |
305 | ||
38fd2143 | 306 | ASSERT_RTNL(); |
e8da2bb4 | 307 | |
458f4f9e JB |
308 | r = get_cfg80211_regdom(); |
309 | ||
942b25cf | 310 | /* avoid freeing static information or freeing something twice */ |
458f4f9e JB |
311 | if (r == cfg80211_world_regdom) |
312 | r = NULL; | |
942b25cf JB |
313 | if (cfg80211_world_regdom == &world_regdom) |
314 | cfg80211_world_regdom = NULL; | |
458f4f9e JB |
315 | if (r == &world_regdom) |
316 | r = NULL; | |
942b25cf | 317 | |
458f4f9e JB |
318 | rcu_free_regdom(r); |
319 | rcu_free_regdom(cfg80211_world_regdom); | |
734366de | 320 | |
a3d2eaf0 | 321 | cfg80211_world_regdom = &world_regdom; |
458f4f9e | 322 | rcu_assign_pointer(cfg80211_regdomain, new_regdom); |
a042994d LR |
323 | |
324 | if (!full_reset) | |
325 | return; | |
326 | ||
05f1a3ea | 327 | reg_update_last_request(&core_request_world); |
734366de JB |
328 | } |
329 | ||
fb1fc7ad LR |
330 | /* |
331 | * Dynamic world regulatory domain requested by the wireless | |
332 | * core upon initialization | |
333 | */ | |
a3d2eaf0 | 334 | static void update_world_regdomain(const struct ieee80211_regdomain *rd) |
734366de | 335 | { |
c492db37 | 336 | struct regulatory_request *lr; |
734366de | 337 | |
c492db37 JB |
338 | lr = get_last_request(); |
339 | ||
340 | WARN_ON(!lr); | |
734366de | 341 | |
379b82f4 | 342 | reset_regdomains(false, rd); |
734366de JB |
343 | |
344 | cfg80211_world_regdom = rd; | |
734366de | 345 | } |
734366de | 346 | |
a3d2eaf0 | 347 | bool is_world_regdom(const char *alpha2) |
b2e1b302 LR |
348 | { |
349 | if (!alpha2) | |
350 | return false; | |
1a919318 | 351 | return alpha2[0] == '0' && alpha2[1] == '0'; |
b2e1b302 | 352 | } |
8318d78a | 353 | |
a3d2eaf0 | 354 | static bool is_alpha2_set(const char *alpha2) |
b2e1b302 LR |
355 | { |
356 | if (!alpha2) | |
357 | return false; | |
1a919318 | 358 | return alpha2[0] && alpha2[1]; |
b2e1b302 | 359 | } |
8318d78a | 360 | |
a3d2eaf0 | 361 | static bool is_unknown_alpha2(const char *alpha2) |
b2e1b302 LR |
362 | { |
363 | if (!alpha2) | |
364 | return false; | |
fb1fc7ad LR |
365 | /* |
366 | * Special case where regulatory domain was built by driver | |
367 | * but a specific alpha2 cannot be determined | |
368 | */ | |
1a919318 | 369 | return alpha2[0] == '9' && alpha2[1] == '9'; |
b2e1b302 | 370 | } |
8318d78a | 371 | |
3f2355cb LR |
372 | static bool is_intersected_alpha2(const char *alpha2) |
373 | { | |
374 | if (!alpha2) | |
375 | return false; | |
fb1fc7ad LR |
376 | /* |
377 | * Special case where regulatory domain is the | |
3f2355cb | 378 | * result of an intersection between two regulatory domain |
fb1fc7ad LR |
379 | * structures |
380 | */ | |
1a919318 | 381 | return alpha2[0] == '9' && alpha2[1] == '8'; |
3f2355cb LR |
382 | } |
383 | ||
a3d2eaf0 | 384 | static bool is_an_alpha2(const char *alpha2) |
b2e1b302 LR |
385 | { |
386 | if (!alpha2) | |
387 | return false; | |
1a919318 | 388 | return isalpha(alpha2[0]) && isalpha(alpha2[1]); |
b2e1b302 | 389 | } |
8318d78a | 390 | |
a3d2eaf0 | 391 | static bool alpha2_equal(const char *alpha2_x, const char *alpha2_y) |
b2e1b302 LR |
392 | { |
393 | if (!alpha2_x || !alpha2_y) | |
394 | return false; | |
1a919318 | 395 | return alpha2_x[0] == alpha2_y[0] && alpha2_x[1] == alpha2_y[1]; |
b2e1b302 LR |
396 | } |
397 | ||
69b1572b | 398 | static bool regdom_changes(const char *alpha2) |
b2e1b302 | 399 | { |
458f4f9e | 400 | const struct ieee80211_regdomain *r = get_cfg80211_regdom(); |
761cf7ec | 401 | |
458f4f9e | 402 | if (!r) |
b2e1b302 | 403 | return true; |
458f4f9e | 404 | return !alpha2_equal(r->alpha2, alpha2); |
b2e1b302 LR |
405 | } |
406 | ||
09d989d1 LR |
407 | /* |
408 | * The NL80211_REGDOM_SET_BY_USER regdom alpha2 is cached, this lets | |
409 | * you know if a valid regulatory hint with NL80211_REGDOM_SET_BY_USER | |
410 | * has ever been issued. | |
411 | */ | |
412 | static bool is_user_regdom_saved(void) | |
413 | { | |
414 | if (user_alpha2[0] == '9' && user_alpha2[1] == '7') | |
415 | return false; | |
416 | ||
417 | /* This would indicate a mistake on the design */ | |
1a919318 | 418 | if (WARN(!is_world_regdom(user_alpha2) && !is_an_alpha2(user_alpha2), |
09d989d1 | 419 | "Unexpected user alpha2: %c%c\n", |
1a919318 | 420 | user_alpha2[0], user_alpha2[1])) |
09d989d1 LR |
421 | return false; |
422 | ||
423 | return true; | |
424 | } | |
425 | ||
e9763c3c JB |
426 | static const struct ieee80211_regdomain * |
427 | reg_copy_regd(const struct ieee80211_regdomain *src_regd) | |
3b377ea9 JL |
428 | { |
429 | struct ieee80211_regdomain *regd; | |
e9763c3c | 430 | int size_of_regd; |
3b377ea9 JL |
431 | unsigned int i; |
432 | ||
82f20856 JB |
433 | size_of_regd = |
434 | sizeof(struct ieee80211_regdomain) + | |
435 | src_regd->n_reg_rules * sizeof(struct ieee80211_reg_rule); | |
3b377ea9 JL |
436 | |
437 | regd = kzalloc(size_of_regd, GFP_KERNEL); | |
438 | if (!regd) | |
e9763c3c | 439 | return ERR_PTR(-ENOMEM); |
3b377ea9 JL |
440 | |
441 | memcpy(regd, src_regd, sizeof(struct ieee80211_regdomain)); | |
442 | ||
443 | for (i = 0; i < src_regd->n_reg_rules; i++) | |
444 | memcpy(®d->reg_rules[i], &src_regd->reg_rules[i], | |
e9763c3c | 445 | sizeof(struct ieee80211_reg_rule)); |
3b377ea9 | 446 | |
e9763c3c | 447 | return regd; |
3b377ea9 JL |
448 | } |
449 | ||
450 | #ifdef CONFIG_CFG80211_INTERNAL_REGDB | |
451 | struct reg_regdb_search_request { | |
452 | char alpha2[2]; | |
453 | struct list_head list; | |
454 | }; | |
455 | ||
456 | static LIST_HEAD(reg_regdb_search_list); | |
368d06f5 | 457 | static DEFINE_MUTEX(reg_regdb_search_mutex); |
3b377ea9 JL |
458 | |
459 | static void reg_regdb_search(struct work_struct *work) | |
460 | { | |
461 | struct reg_regdb_search_request *request; | |
e9763c3c JB |
462 | const struct ieee80211_regdomain *curdom, *regdom = NULL; |
463 | int i; | |
a85d0d7f | 464 | |
5fe231e8 | 465 | rtnl_lock(); |
3b377ea9 | 466 | |
368d06f5 | 467 | mutex_lock(®_regdb_search_mutex); |
3b377ea9 JL |
468 | while (!list_empty(®_regdb_search_list)) { |
469 | request = list_first_entry(®_regdb_search_list, | |
470 | struct reg_regdb_search_request, | |
471 | list); | |
472 | list_del(&request->list); | |
473 | ||
1a919318 | 474 | for (i = 0; i < reg_regdb_size; i++) { |
3b377ea9 JL |
475 | curdom = reg_regdb[i]; |
476 | ||
1a919318 | 477 | if (alpha2_equal(request->alpha2, curdom->alpha2)) { |
e9763c3c | 478 | regdom = reg_copy_regd(curdom); |
3b377ea9 JL |
479 | break; |
480 | } | |
481 | } | |
482 | ||
483 | kfree(request); | |
484 | } | |
368d06f5 | 485 | mutex_unlock(®_regdb_search_mutex); |
a85d0d7f | 486 | |
e9763c3c | 487 | if (!IS_ERR_OR_NULL(regdom)) |
a85d0d7f LR |
488 | set_regdom(regdom); |
489 | ||
5fe231e8 | 490 | rtnl_unlock(); |
3b377ea9 JL |
491 | } |
492 | ||
493 | static DECLARE_WORK(reg_regdb_work, reg_regdb_search); | |
494 | ||
495 | static void reg_regdb_query(const char *alpha2) | |
496 | { | |
497 | struct reg_regdb_search_request *request; | |
498 | ||
499 | if (!alpha2) | |
500 | return; | |
501 | ||
502 | request = kzalloc(sizeof(struct reg_regdb_search_request), GFP_KERNEL); | |
503 | if (!request) | |
504 | return; | |
505 | ||
506 | memcpy(request->alpha2, alpha2, 2); | |
507 | ||
368d06f5 | 508 | mutex_lock(®_regdb_search_mutex); |
3b377ea9 | 509 | list_add_tail(&request->list, ®_regdb_search_list); |
368d06f5 | 510 | mutex_unlock(®_regdb_search_mutex); |
3b377ea9 JL |
511 | |
512 | schedule_work(®_regdb_work); | |
513 | } | |
80007efe LR |
514 | |
515 | /* Feel free to add any other sanity checks here */ | |
516 | static void reg_regdb_size_check(void) | |
517 | { | |
518 | /* We should ideally BUILD_BUG_ON() but then random builds would fail */ | |
519 | WARN_ONCE(!reg_regdb_size, "db.txt is empty, you should update it..."); | |
520 | } | |
3b377ea9 | 521 | #else |
80007efe | 522 | static inline void reg_regdb_size_check(void) {} |
3b377ea9 JL |
523 | static inline void reg_regdb_query(const char *alpha2) {} |
524 | #endif /* CONFIG_CFG80211_INTERNAL_REGDB */ | |
525 | ||
fb1fc7ad LR |
526 | /* |
527 | * This lets us keep regulatory code which is updated on a regulatory | |
1226d258 | 528 | * basis in userspace. |
fb1fc7ad | 529 | */ |
b2e1b302 LR |
530 | static int call_crda(const char *alpha2) |
531 | { | |
1226d258 JB |
532 | char country[12]; |
533 | char *env[] = { country, NULL }; | |
534 | ||
535 | snprintf(country, sizeof(country), "COUNTRY=%c%c", | |
536 | alpha2[0], alpha2[1]); | |
537 | ||
b2e1b302 | 538 | if (!is_world_regdom((char *) alpha2)) |
e9c0268f | 539 | pr_info("Calling CRDA for country: %c%c\n", |
b2e1b302 LR |
540 | alpha2[0], alpha2[1]); |
541 | else | |
e9c0268f | 542 | pr_info("Calling CRDA to update world regulatory domain\n"); |
b2e1b302 | 543 | |
3b377ea9 JL |
544 | /* query internal regulatory database (if it exists) */ |
545 | reg_regdb_query(alpha2); | |
546 | ||
1226d258 | 547 | return kobject_uevent_env(®_pdev->dev.kobj, KOBJ_CHANGE, env); |
b2e1b302 LR |
548 | } |
549 | ||
fe6631ff LR |
550 | static enum reg_request_treatment |
551 | reg_call_crda(struct regulatory_request *request) | |
552 | { | |
553 | if (call_crda(request->alpha2)) | |
554 | return REG_REQ_IGNORE; | |
eeca9fce I |
555 | |
556 | queue_delayed_work(system_power_efficient_wq, | |
557 | ®_timeout, msecs_to_jiffies(3142)); | |
fe6631ff LR |
558 | return REG_REQ_OK; |
559 | } | |
560 | ||
e438768f | 561 | bool reg_is_valid_request(const char *alpha2) |
b2e1b302 | 562 | { |
c492db37 | 563 | struct regulatory_request *lr = get_last_request(); |
61405e97 | 564 | |
c492db37 | 565 | if (!lr || lr->processed) |
f6037d09 JB |
566 | return false; |
567 | ||
c492db37 | 568 | return alpha2_equal(lr->alpha2, alpha2); |
b2e1b302 | 569 | } |
8318d78a | 570 | |
e3961af1 JD |
571 | static const struct ieee80211_regdomain *reg_get_regdomain(struct wiphy *wiphy) |
572 | { | |
573 | struct regulatory_request *lr = get_last_request(); | |
574 | ||
575 | /* | |
576 | * Follow the driver's regulatory domain, if present, unless a country | |
577 | * IE has been processed or a user wants to help complaince further | |
578 | */ | |
579 | if (lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && | |
580 | lr->initiator != NL80211_REGDOM_SET_BY_USER && | |
581 | wiphy->regd) | |
582 | return get_wiphy_regdom(wiphy); | |
583 | ||
584 | return get_cfg80211_regdom(); | |
585 | } | |
586 | ||
a6d4a534 AN |
587 | static unsigned int |
588 | reg_get_max_bandwidth_from_range(const struct ieee80211_regdomain *rd, | |
589 | const struct ieee80211_reg_rule *rule) | |
97524820 JD |
590 | { |
591 | const struct ieee80211_freq_range *freq_range = &rule->freq_range; | |
592 | const struct ieee80211_freq_range *freq_range_tmp; | |
593 | const struct ieee80211_reg_rule *tmp; | |
594 | u32 start_freq, end_freq, idx, no; | |
595 | ||
596 | for (idx = 0; idx < rd->n_reg_rules; idx++) | |
597 | if (rule == &rd->reg_rules[idx]) | |
598 | break; | |
599 | ||
600 | if (idx == rd->n_reg_rules) | |
601 | return 0; | |
602 | ||
603 | /* get start_freq */ | |
604 | no = idx; | |
605 | ||
606 | while (no) { | |
607 | tmp = &rd->reg_rules[--no]; | |
608 | freq_range_tmp = &tmp->freq_range; | |
609 | ||
610 | if (freq_range_tmp->end_freq_khz < freq_range->start_freq_khz) | |
611 | break; | |
612 | ||
97524820 JD |
613 | freq_range = freq_range_tmp; |
614 | } | |
615 | ||
616 | start_freq = freq_range->start_freq_khz; | |
617 | ||
618 | /* get end_freq */ | |
619 | freq_range = &rule->freq_range; | |
620 | no = idx; | |
621 | ||
622 | while (no < rd->n_reg_rules - 1) { | |
623 | tmp = &rd->reg_rules[++no]; | |
624 | freq_range_tmp = &tmp->freq_range; | |
625 | ||
626 | if (freq_range_tmp->start_freq_khz > freq_range->end_freq_khz) | |
627 | break; | |
628 | ||
97524820 JD |
629 | freq_range = freq_range_tmp; |
630 | } | |
631 | ||
632 | end_freq = freq_range->end_freq_khz; | |
633 | ||
634 | return end_freq - start_freq; | |
635 | } | |
636 | ||
a6d4a534 AN |
637 | unsigned int reg_get_max_bandwidth(const struct ieee80211_regdomain *rd, |
638 | const struct ieee80211_reg_rule *rule) | |
639 | { | |
640 | unsigned int bw = reg_get_max_bandwidth_from_range(rd, rule); | |
641 | ||
642 | if (rule->flags & NL80211_RRF_NO_160MHZ) | |
643 | bw = min_t(unsigned int, bw, MHZ_TO_KHZ(80)); | |
644 | if (rule->flags & NL80211_RRF_NO_80MHZ) | |
645 | bw = min_t(unsigned int, bw, MHZ_TO_KHZ(40)); | |
646 | ||
647 | /* | |
648 | * HT40+/HT40- limits are handled per-channel. Only limit BW if both | |
649 | * are not allowed. | |
650 | */ | |
651 | if (rule->flags & NL80211_RRF_NO_HT40MINUS && | |
652 | rule->flags & NL80211_RRF_NO_HT40PLUS) | |
653 | bw = min_t(unsigned int, bw, MHZ_TO_KHZ(20)); | |
654 | ||
655 | return bw; | |
656 | } | |
657 | ||
b2e1b302 | 658 | /* Sanity check on a regulatory rule */ |
a3d2eaf0 | 659 | static bool is_valid_reg_rule(const struct ieee80211_reg_rule *rule) |
8318d78a | 660 | { |
a3d2eaf0 | 661 | const struct ieee80211_freq_range *freq_range = &rule->freq_range; |
b2e1b302 LR |
662 | u32 freq_diff; |
663 | ||
91e99004 | 664 | if (freq_range->start_freq_khz <= 0 || freq_range->end_freq_khz <= 0) |
b2e1b302 LR |
665 | return false; |
666 | ||
667 | if (freq_range->start_freq_khz > freq_range->end_freq_khz) | |
668 | return false; | |
669 | ||
670 | freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz; | |
671 | ||
bd05f28e | 672 | if (freq_range->end_freq_khz <= freq_range->start_freq_khz || |
1a919318 | 673 | freq_range->max_bandwidth_khz > freq_diff) |
b2e1b302 LR |
674 | return false; |
675 | ||
676 | return true; | |
677 | } | |
678 | ||
a3d2eaf0 | 679 | static bool is_valid_rd(const struct ieee80211_regdomain *rd) |
b2e1b302 | 680 | { |
a3d2eaf0 | 681 | const struct ieee80211_reg_rule *reg_rule = NULL; |
b2e1b302 | 682 | unsigned int i; |
8318d78a | 683 | |
b2e1b302 LR |
684 | if (!rd->n_reg_rules) |
685 | return false; | |
8318d78a | 686 | |
88dc1c3f LR |
687 | if (WARN_ON(rd->n_reg_rules > NL80211_MAX_SUPP_REG_RULES)) |
688 | return false; | |
689 | ||
b2e1b302 LR |
690 | for (i = 0; i < rd->n_reg_rules; i++) { |
691 | reg_rule = &rd->reg_rules[i]; | |
692 | if (!is_valid_reg_rule(reg_rule)) | |
693 | return false; | |
694 | } | |
695 | ||
696 | return true; | |
8318d78a JB |
697 | } |
698 | ||
038659e7 | 699 | static bool reg_does_bw_fit(const struct ieee80211_freq_range *freq_range, |
fe7ef5e9 | 700 | u32 center_freq_khz, u32 bw_khz) |
b2e1b302 | 701 | { |
038659e7 LR |
702 | u32 start_freq_khz, end_freq_khz; |
703 | ||
704 | start_freq_khz = center_freq_khz - (bw_khz/2); | |
705 | end_freq_khz = center_freq_khz + (bw_khz/2); | |
706 | ||
707 | if (start_freq_khz >= freq_range->start_freq_khz && | |
708 | end_freq_khz <= freq_range->end_freq_khz) | |
709 | return true; | |
710 | ||
711 | return false; | |
b2e1b302 | 712 | } |
8318d78a | 713 | |
0c7dc45d LR |
714 | /** |
715 | * freq_in_rule_band - tells us if a frequency is in a frequency band | |
716 | * @freq_range: frequency rule we want to query | |
717 | * @freq_khz: frequency we are inquiring about | |
718 | * | |
719 | * This lets us know if a specific frequency rule is or is not relevant to | |
720 | * a specific frequency's band. Bands are device specific and artificial | |
64629b9d VK |
721 | * definitions (the "2.4 GHz band", the "5 GHz band" and the "60GHz band"), |
722 | * however it is safe for now to assume that a frequency rule should not be | |
723 | * part of a frequency's band if the start freq or end freq are off by more | |
724 | * than 2 GHz for the 2.4 and 5 GHz bands, and by more than 10 GHz for the | |
725 | * 60 GHz band. | |
0c7dc45d LR |
726 | * This resolution can be lowered and should be considered as we add |
727 | * regulatory rule support for other "bands". | |
728 | **/ | |
729 | static bool freq_in_rule_band(const struct ieee80211_freq_range *freq_range, | |
1a919318 | 730 | u32 freq_khz) |
0c7dc45d LR |
731 | { |
732 | #define ONE_GHZ_IN_KHZ 1000000 | |
64629b9d VK |
733 | /* |
734 | * From 802.11ad: directional multi-gigabit (DMG): | |
735 | * Pertaining to operation in a frequency band containing a channel | |
736 | * with the Channel starting frequency above 45 GHz. | |
737 | */ | |
738 | u32 limit = freq_khz > 45 * ONE_GHZ_IN_KHZ ? | |
739 | 10 * ONE_GHZ_IN_KHZ : 2 * ONE_GHZ_IN_KHZ; | |
740 | if (abs(freq_khz - freq_range->start_freq_khz) <= limit) | |
0c7dc45d | 741 | return true; |
64629b9d | 742 | if (abs(freq_khz - freq_range->end_freq_khz) <= limit) |
0c7dc45d LR |
743 | return true; |
744 | return false; | |
745 | #undef ONE_GHZ_IN_KHZ | |
746 | } | |
747 | ||
adbfb058 LR |
748 | /* |
749 | * Later on we can perhaps use the more restrictive DFS | |
750 | * region but we don't have information for that yet so | |
751 | * for now simply disallow conflicts. | |
752 | */ | |
753 | static enum nl80211_dfs_regions | |
754 | reg_intersect_dfs_region(const enum nl80211_dfs_regions dfs_region1, | |
755 | const enum nl80211_dfs_regions dfs_region2) | |
756 | { | |
757 | if (dfs_region1 != dfs_region2) | |
758 | return NL80211_DFS_UNSET; | |
759 | return dfs_region1; | |
760 | } | |
761 | ||
fb1fc7ad LR |
762 | /* |
763 | * Helper for regdom_intersect(), this does the real | |
764 | * mathematical intersection fun | |
765 | */ | |
97524820 JD |
766 | static int reg_rules_intersect(const struct ieee80211_regdomain *rd1, |
767 | const struct ieee80211_regdomain *rd2, | |
768 | const struct ieee80211_reg_rule *rule1, | |
1a919318 JB |
769 | const struct ieee80211_reg_rule *rule2, |
770 | struct ieee80211_reg_rule *intersected_rule) | |
9c96477d LR |
771 | { |
772 | const struct ieee80211_freq_range *freq_range1, *freq_range2; | |
773 | struct ieee80211_freq_range *freq_range; | |
774 | const struct ieee80211_power_rule *power_rule1, *power_rule2; | |
775 | struct ieee80211_power_rule *power_rule; | |
97524820 | 776 | u32 freq_diff, max_bandwidth1, max_bandwidth2; |
9c96477d LR |
777 | |
778 | freq_range1 = &rule1->freq_range; | |
779 | freq_range2 = &rule2->freq_range; | |
780 | freq_range = &intersected_rule->freq_range; | |
781 | ||
782 | power_rule1 = &rule1->power_rule; | |
783 | power_rule2 = &rule2->power_rule; | |
784 | power_rule = &intersected_rule->power_rule; | |
785 | ||
786 | freq_range->start_freq_khz = max(freq_range1->start_freq_khz, | |
1a919318 | 787 | freq_range2->start_freq_khz); |
9c96477d | 788 | freq_range->end_freq_khz = min(freq_range1->end_freq_khz, |
1a919318 | 789 | freq_range2->end_freq_khz); |
97524820 JD |
790 | |
791 | max_bandwidth1 = freq_range1->max_bandwidth_khz; | |
792 | max_bandwidth2 = freq_range2->max_bandwidth_khz; | |
793 | ||
b0dfd2ea JD |
794 | if (rule1->flags & NL80211_RRF_AUTO_BW) |
795 | max_bandwidth1 = reg_get_max_bandwidth(rd1, rule1); | |
796 | if (rule2->flags & NL80211_RRF_AUTO_BW) | |
797 | max_bandwidth2 = reg_get_max_bandwidth(rd2, rule2); | |
97524820 JD |
798 | |
799 | freq_range->max_bandwidth_khz = min(max_bandwidth1, max_bandwidth2); | |
9c96477d | 800 | |
b0dfd2ea JD |
801 | intersected_rule->flags = rule1->flags | rule2->flags; |
802 | ||
803 | /* | |
804 | * In case NL80211_RRF_AUTO_BW requested for both rules | |
805 | * set AUTO_BW in intersected rule also. Next we will | |
806 | * calculate BW correctly in handle_channel function. | |
807 | * In other case remove AUTO_BW flag while we calculate | |
808 | * maximum bandwidth correctly and auto calculation is | |
809 | * not required. | |
810 | */ | |
811 | if ((rule1->flags & NL80211_RRF_AUTO_BW) && | |
812 | (rule2->flags & NL80211_RRF_AUTO_BW)) | |
813 | intersected_rule->flags |= NL80211_RRF_AUTO_BW; | |
814 | else | |
815 | intersected_rule->flags &= ~NL80211_RRF_AUTO_BW; | |
816 | ||
9c96477d LR |
817 | freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz; |
818 | if (freq_range->max_bandwidth_khz > freq_diff) | |
819 | freq_range->max_bandwidth_khz = freq_diff; | |
820 | ||
821 | power_rule->max_eirp = min(power_rule1->max_eirp, | |
822 | power_rule2->max_eirp); | |
823 | power_rule->max_antenna_gain = min(power_rule1->max_antenna_gain, | |
824 | power_rule2->max_antenna_gain); | |
825 | ||
089027e5 JD |
826 | intersected_rule->dfs_cac_ms = max(rule1->dfs_cac_ms, |
827 | rule2->dfs_cac_ms); | |
828 | ||
9c96477d LR |
829 | if (!is_valid_reg_rule(intersected_rule)) |
830 | return -EINVAL; | |
831 | ||
832 | return 0; | |
833 | } | |
834 | ||
a62a1aed EP |
835 | /* check whether old rule contains new rule */ |
836 | static bool rule_contains(struct ieee80211_reg_rule *r1, | |
837 | struct ieee80211_reg_rule *r2) | |
838 | { | |
839 | /* for simplicity, currently consider only same flags */ | |
840 | if (r1->flags != r2->flags) | |
841 | return false; | |
842 | ||
843 | /* verify r1 is more restrictive */ | |
844 | if ((r1->power_rule.max_antenna_gain > | |
845 | r2->power_rule.max_antenna_gain) || | |
846 | r1->power_rule.max_eirp > r2->power_rule.max_eirp) | |
847 | return false; | |
848 | ||
849 | /* make sure r2's range is contained within r1 */ | |
850 | if (r1->freq_range.start_freq_khz > r2->freq_range.start_freq_khz || | |
851 | r1->freq_range.end_freq_khz < r2->freq_range.end_freq_khz) | |
852 | return false; | |
853 | ||
854 | /* and finally verify that r1.max_bw >= r2.max_bw */ | |
855 | if (r1->freq_range.max_bandwidth_khz < | |
856 | r2->freq_range.max_bandwidth_khz) | |
857 | return false; | |
858 | ||
859 | return true; | |
860 | } | |
861 | ||
862 | /* add or extend current rules. do nothing if rule is already contained */ | |
863 | static void add_rule(struct ieee80211_reg_rule *rule, | |
864 | struct ieee80211_reg_rule *reg_rules, u32 *n_rules) | |
865 | { | |
866 | struct ieee80211_reg_rule *tmp_rule; | |
867 | int i; | |
868 | ||
869 | for (i = 0; i < *n_rules; i++) { | |
870 | tmp_rule = ®_rules[i]; | |
871 | /* rule is already contained - do nothing */ | |
872 | if (rule_contains(tmp_rule, rule)) | |
873 | return; | |
874 | ||
875 | /* extend rule if possible */ | |
876 | if (rule_contains(rule, tmp_rule)) { | |
877 | memcpy(tmp_rule, rule, sizeof(*rule)); | |
878 | return; | |
879 | } | |
880 | } | |
881 | ||
882 | memcpy(®_rules[*n_rules], rule, sizeof(*rule)); | |
883 | (*n_rules)++; | |
884 | } | |
885 | ||
9c96477d LR |
886 | /** |
887 | * regdom_intersect - do the intersection between two regulatory domains | |
888 | * @rd1: first regulatory domain | |
889 | * @rd2: second regulatory domain | |
890 | * | |
891 | * Use this function to get the intersection between two regulatory domains. | |
892 | * Once completed we will mark the alpha2 for the rd as intersected, "98", | |
893 | * as no one single alpha2 can represent this regulatory domain. | |
894 | * | |
895 | * Returns a pointer to the regulatory domain structure which will hold the | |
896 | * resulting intersection of rules between rd1 and rd2. We will | |
897 | * kzalloc() this structure for you. | |
898 | */ | |
1a919318 JB |
899 | static struct ieee80211_regdomain * |
900 | regdom_intersect(const struct ieee80211_regdomain *rd1, | |
901 | const struct ieee80211_regdomain *rd2) | |
9c96477d LR |
902 | { |
903 | int r, size_of_regd; | |
904 | unsigned int x, y; | |
a62a1aed | 905 | unsigned int num_rules = 0; |
9c96477d | 906 | const struct ieee80211_reg_rule *rule1, *rule2; |
a62a1aed | 907 | struct ieee80211_reg_rule intersected_rule; |
9c96477d | 908 | struct ieee80211_regdomain *rd; |
9c96477d LR |
909 | |
910 | if (!rd1 || !rd2) | |
911 | return NULL; | |
912 | ||
fb1fc7ad LR |
913 | /* |
914 | * First we get a count of the rules we'll need, then we actually | |
9c96477d LR |
915 | * build them. This is to so we can malloc() and free() a |
916 | * regdomain once. The reason we use reg_rules_intersect() here | |
917 | * is it will return -EINVAL if the rule computed makes no sense. | |
fb1fc7ad LR |
918 | * All rules that do check out OK are valid. |
919 | */ | |
9c96477d LR |
920 | |
921 | for (x = 0; x < rd1->n_reg_rules; x++) { | |
922 | rule1 = &rd1->reg_rules[x]; | |
923 | for (y = 0; y < rd2->n_reg_rules; y++) { | |
924 | rule2 = &rd2->reg_rules[y]; | |
97524820 | 925 | if (!reg_rules_intersect(rd1, rd2, rule1, rule2, |
a62a1aed | 926 | &intersected_rule)) |
9c96477d | 927 | num_rules++; |
9c96477d LR |
928 | } |
929 | } | |
930 | ||
931 | if (!num_rules) | |
932 | return NULL; | |
933 | ||
934 | size_of_regd = sizeof(struct ieee80211_regdomain) + | |
82f20856 | 935 | num_rules * sizeof(struct ieee80211_reg_rule); |
9c96477d LR |
936 | |
937 | rd = kzalloc(size_of_regd, GFP_KERNEL); | |
938 | if (!rd) | |
939 | return NULL; | |
940 | ||
a62a1aed | 941 | for (x = 0; x < rd1->n_reg_rules; x++) { |
9c96477d | 942 | rule1 = &rd1->reg_rules[x]; |
a62a1aed | 943 | for (y = 0; y < rd2->n_reg_rules; y++) { |
9c96477d | 944 | rule2 = &rd2->reg_rules[y]; |
97524820 | 945 | r = reg_rules_intersect(rd1, rd2, rule1, rule2, |
a62a1aed | 946 | &intersected_rule); |
fb1fc7ad LR |
947 | /* |
948 | * No need to memset here the intersected rule here as | |
949 | * we're not using the stack anymore | |
950 | */ | |
9c96477d LR |
951 | if (r) |
952 | continue; | |
9c96477d | 953 | |
a62a1aed EP |
954 | add_rule(&intersected_rule, rd->reg_rules, |
955 | &rd->n_reg_rules); | |
956 | } | |
9c96477d LR |
957 | } |
958 | ||
9c96477d LR |
959 | rd->alpha2[0] = '9'; |
960 | rd->alpha2[1] = '8'; | |
adbfb058 LR |
961 | rd->dfs_region = reg_intersect_dfs_region(rd1->dfs_region, |
962 | rd2->dfs_region); | |
9c96477d LR |
963 | |
964 | return rd; | |
965 | } | |
966 | ||
fb1fc7ad LR |
967 | /* |
968 | * XXX: add support for the rest of enum nl80211_reg_rule_flags, we may | |
969 | * want to just have the channel structure use these | |
970 | */ | |
b2e1b302 LR |
971 | static u32 map_regdom_flags(u32 rd_flags) |
972 | { | |
973 | u32 channel_flags = 0; | |
8fe02e16 LR |
974 | if (rd_flags & NL80211_RRF_NO_IR_ALL) |
975 | channel_flags |= IEEE80211_CHAN_NO_IR; | |
b2e1b302 LR |
976 | if (rd_flags & NL80211_RRF_DFS) |
977 | channel_flags |= IEEE80211_CHAN_RADAR; | |
03f6b084 SF |
978 | if (rd_flags & NL80211_RRF_NO_OFDM) |
979 | channel_flags |= IEEE80211_CHAN_NO_OFDM; | |
570dbde1 DS |
980 | if (rd_flags & NL80211_RRF_NO_OUTDOOR) |
981 | channel_flags |= IEEE80211_CHAN_INDOOR_ONLY; | |
a6d4a534 AN |
982 | if (rd_flags & NL80211_RRF_GO_CONCURRENT) |
983 | channel_flags |= IEEE80211_CHAN_GO_CONCURRENT; | |
984 | if (rd_flags & NL80211_RRF_NO_HT40MINUS) | |
985 | channel_flags |= IEEE80211_CHAN_NO_HT40MINUS; | |
986 | if (rd_flags & NL80211_RRF_NO_HT40PLUS) | |
987 | channel_flags |= IEEE80211_CHAN_NO_HT40PLUS; | |
988 | if (rd_flags & NL80211_RRF_NO_80MHZ) | |
989 | channel_flags |= IEEE80211_CHAN_NO_80MHZ; | |
990 | if (rd_flags & NL80211_RRF_NO_160MHZ) | |
991 | channel_flags |= IEEE80211_CHAN_NO_160MHZ; | |
b2e1b302 LR |
992 | return channel_flags; |
993 | } | |
994 | ||
361c9c8b JB |
995 | static const struct ieee80211_reg_rule * |
996 | freq_reg_info_regd(struct wiphy *wiphy, u32 center_freq, | |
997 | const struct ieee80211_regdomain *regd) | |
8318d78a JB |
998 | { |
999 | int i; | |
0c7dc45d | 1000 | bool band_rule_found = false; |
038659e7 LR |
1001 | bool bw_fits = false; |
1002 | ||
3e0c3ff3 | 1003 | if (!regd) |
361c9c8b | 1004 | return ERR_PTR(-EINVAL); |
b2e1b302 | 1005 | |
3e0c3ff3 | 1006 | for (i = 0; i < regd->n_reg_rules; i++) { |
b2e1b302 LR |
1007 | const struct ieee80211_reg_rule *rr; |
1008 | const struct ieee80211_freq_range *fr = NULL; | |
b2e1b302 | 1009 | |
3e0c3ff3 | 1010 | rr = ®d->reg_rules[i]; |
b2e1b302 | 1011 | fr = &rr->freq_range; |
0c7dc45d | 1012 | |
fb1fc7ad LR |
1013 | /* |
1014 | * We only need to know if one frequency rule was | |
0c7dc45d | 1015 | * was in center_freq's band, that's enough, so lets |
fb1fc7ad LR |
1016 | * not overwrite it once found |
1017 | */ | |
0c7dc45d LR |
1018 | if (!band_rule_found) |
1019 | band_rule_found = freq_in_rule_band(fr, center_freq); | |
1020 | ||
e33e2241 | 1021 | bw_fits = reg_does_bw_fit(fr, center_freq, MHZ_TO_KHZ(20)); |
0c7dc45d | 1022 | |
361c9c8b JB |
1023 | if (band_rule_found && bw_fits) |
1024 | return rr; | |
8318d78a JB |
1025 | } |
1026 | ||
0c7dc45d | 1027 | if (!band_rule_found) |
361c9c8b | 1028 | return ERR_PTR(-ERANGE); |
0c7dc45d | 1029 | |
361c9c8b | 1030 | return ERR_PTR(-EINVAL); |
b2e1b302 LR |
1031 | } |
1032 | ||
361c9c8b JB |
1033 | const struct ieee80211_reg_rule *freq_reg_info(struct wiphy *wiphy, |
1034 | u32 center_freq) | |
1fa25e41 | 1035 | { |
5d885b99 | 1036 | const struct ieee80211_regdomain *regd; |
1a919318 | 1037 | |
e3961af1 | 1038 | regd = reg_get_regdomain(wiphy); |
5d885b99 | 1039 | |
361c9c8b | 1040 | return freq_reg_info_regd(wiphy, center_freq, regd); |
1fa25e41 | 1041 | } |
4f366c5d | 1042 | EXPORT_SYMBOL(freq_reg_info); |
b2e1b302 | 1043 | |
034c6d6e | 1044 | const char *reg_initiator_name(enum nl80211_reg_initiator initiator) |
926a0a09 LR |
1045 | { |
1046 | switch (initiator) { | |
1047 | case NL80211_REGDOM_SET_BY_CORE: | |
034c6d6e | 1048 | return "core"; |
926a0a09 | 1049 | case NL80211_REGDOM_SET_BY_USER: |
034c6d6e | 1050 | return "user"; |
926a0a09 | 1051 | case NL80211_REGDOM_SET_BY_DRIVER: |
034c6d6e | 1052 | return "driver"; |
926a0a09 | 1053 | case NL80211_REGDOM_SET_BY_COUNTRY_IE: |
034c6d6e | 1054 | return "country IE"; |
926a0a09 LR |
1055 | default: |
1056 | WARN_ON(1); | |
034c6d6e | 1057 | return "bug"; |
926a0a09 LR |
1058 | } |
1059 | } | |
034c6d6e | 1060 | EXPORT_SYMBOL(reg_initiator_name); |
e702d3cf | 1061 | |
034c6d6e | 1062 | #ifdef CONFIG_CFG80211_REG_DEBUG |
b0dfd2ea JD |
1063 | static void chan_reg_rule_print_dbg(const struct ieee80211_regdomain *regd, |
1064 | struct ieee80211_channel *chan, | |
e702d3cf LR |
1065 | const struct ieee80211_reg_rule *reg_rule) |
1066 | { | |
1067 | const struct ieee80211_power_rule *power_rule; | |
1068 | const struct ieee80211_freq_range *freq_range; | |
b0dfd2ea | 1069 | char max_antenna_gain[32], bw[32]; |
e702d3cf LR |
1070 | |
1071 | power_rule = ®_rule->power_rule; | |
1072 | freq_range = ®_rule->freq_range; | |
1073 | ||
1074 | if (!power_rule->max_antenna_gain) | |
b0dfd2ea | 1075 | snprintf(max_antenna_gain, sizeof(max_antenna_gain), "N/A"); |
e702d3cf | 1076 | else |
b0dfd2ea JD |
1077 | snprintf(max_antenna_gain, sizeof(max_antenna_gain), "%d", |
1078 | power_rule->max_antenna_gain); | |
1079 | ||
1080 | if (reg_rule->flags & NL80211_RRF_AUTO_BW) | |
1081 | snprintf(bw, sizeof(bw), "%d KHz, %d KHz AUTO", | |
1082 | freq_range->max_bandwidth_khz, | |
1083 | reg_get_max_bandwidth(regd, reg_rule)); | |
1084 | else | |
1085 | snprintf(bw, sizeof(bw), "%d KHz", | |
1086 | freq_range->max_bandwidth_khz); | |
e702d3cf | 1087 | |
fe7ef5e9 JB |
1088 | REG_DBG_PRINT("Updating information on frequency %d MHz with regulatory rule:\n", |
1089 | chan->center_freq); | |
e702d3cf | 1090 | |
b0dfd2ea | 1091 | REG_DBG_PRINT("%d KHz - %d KHz @ %s), (%s mBi, %d mBm)\n", |
1a919318 | 1092 | freq_range->start_freq_khz, freq_range->end_freq_khz, |
b0dfd2ea | 1093 | bw, max_antenna_gain, |
e702d3cf LR |
1094 | power_rule->max_eirp); |
1095 | } | |
1096 | #else | |
b0dfd2ea JD |
1097 | static void chan_reg_rule_print_dbg(const struct ieee80211_regdomain *regd, |
1098 | struct ieee80211_channel *chan, | |
e702d3cf LR |
1099 | const struct ieee80211_reg_rule *reg_rule) |
1100 | { | |
1101 | return; | |
1102 | } | |
926a0a09 LR |
1103 | #endif |
1104 | ||
e33e2241 JB |
1105 | /* |
1106 | * Note that right now we assume the desired channel bandwidth | |
1107 | * is always 20 MHz for each individual channel (HT40 uses 20 MHz | |
1108 | * per channel, the primary and the extension channel). | |
038659e7 | 1109 | */ |
7ca43d03 LR |
1110 | static void handle_channel(struct wiphy *wiphy, |
1111 | enum nl80211_reg_initiator initiator, | |
fdc9d7b2 | 1112 | struct ieee80211_channel *chan) |
b2e1b302 | 1113 | { |
038659e7 | 1114 | u32 flags, bw_flags = 0; |
b2e1b302 LR |
1115 | const struct ieee80211_reg_rule *reg_rule = NULL; |
1116 | const struct ieee80211_power_rule *power_rule = NULL; | |
038659e7 | 1117 | const struct ieee80211_freq_range *freq_range = NULL; |
fe33eb39 | 1118 | struct wiphy *request_wiphy = NULL; |
c492db37 | 1119 | struct regulatory_request *lr = get_last_request(); |
97524820 JD |
1120 | const struct ieee80211_regdomain *regd; |
1121 | u32 max_bandwidth_khz; | |
a92a3ce7 | 1122 | |
c492db37 | 1123 | request_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx); |
a92a3ce7 LR |
1124 | |
1125 | flags = chan->orig_flags; | |
b2e1b302 | 1126 | |
361c9c8b JB |
1127 | reg_rule = freq_reg_info(wiphy, MHZ_TO_KHZ(chan->center_freq)); |
1128 | if (IS_ERR(reg_rule)) { | |
ca4ffe8f LR |
1129 | /* |
1130 | * We will disable all channels that do not match our | |
25985edc | 1131 | * received regulatory rule unless the hint is coming |
ca4ffe8f LR |
1132 | * from a Country IE and the Country IE had no information |
1133 | * about a band. The IEEE 802.11 spec allows for an AP | |
1134 | * to send only a subset of the regulatory rules allowed, | |
1135 | * so an AP in the US that only supports 2.4 GHz may only send | |
1136 | * a country IE with information for the 2.4 GHz band | |
1137 | * while 5 GHz is still supported. | |
1138 | */ | |
1139 | if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE && | |
361c9c8b | 1140 | PTR_ERR(reg_rule) == -ERANGE) |
ca4ffe8f LR |
1141 | return; |
1142 | ||
cc493e4f LR |
1143 | if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER && |
1144 | request_wiphy && request_wiphy == wiphy && | |
a2f73b6c | 1145 | request_wiphy->regulatory_flags & REGULATORY_STRICT_REG) { |
cc493e4f LR |
1146 | REG_DBG_PRINT("Disabling freq %d MHz for good\n", |
1147 | chan->center_freq); | |
1148 | chan->orig_flags |= IEEE80211_CHAN_DISABLED; | |
1149 | chan->flags = chan->orig_flags; | |
1150 | } else { | |
1151 | REG_DBG_PRINT("Disabling freq %d MHz\n", | |
1152 | chan->center_freq); | |
1153 | chan->flags |= IEEE80211_CHAN_DISABLED; | |
1154 | } | |
8318d78a | 1155 | return; |
ca4ffe8f | 1156 | } |
8318d78a | 1157 | |
b0dfd2ea JD |
1158 | regd = reg_get_regdomain(wiphy); |
1159 | chan_reg_rule_print_dbg(regd, chan, reg_rule); | |
e702d3cf | 1160 | |
b2e1b302 | 1161 | power_rule = ®_rule->power_rule; |
038659e7 LR |
1162 | freq_range = ®_rule->freq_range; |
1163 | ||
97524820 JD |
1164 | max_bandwidth_khz = freq_range->max_bandwidth_khz; |
1165 | /* Check if auto calculation requested */ | |
b0dfd2ea | 1166 | if (reg_rule->flags & NL80211_RRF_AUTO_BW) |
97524820 | 1167 | max_bandwidth_khz = reg_get_max_bandwidth(regd, reg_rule); |
97524820 JD |
1168 | |
1169 | if (max_bandwidth_khz < MHZ_TO_KHZ(40)) | |
e33e2241 | 1170 | bw_flags = IEEE80211_CHAN_NO_HT40; |
97524820 | 1171 | if (max_bandwidth_khz < MHZ_TO_KHZ(80)) |
c7a6ee27 | 1172 | bw_flags |= IEEE80211_CHAN_NO_80MHZ; |
97524820 | 1173 | if (max_bandwidth_khz < MHZ_TO_KHZ(160)) |
c7a6ee27 | 1174 | bw_flags |= IEEE80211_CHAN_NO_160MHZ; |
b2e1b302 | 1175 | |
c492db37 | 1176 | if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER && |
806a9e39 | 1177 | request_wiphy && request_wiphy == wiphy && |
a2f73b6c | 1178 | request_wiphy->regulatory_flags & REGULATORY_STRICT_REG) { |
fb1fc7ad | 1179 | /* |
25985edc | 1180 | * This guarantees the driver's requested regulatory domain |
f976376d | 1181 | * will always be used as a base for further regulatory |
fb1fc7ad LR |
1182 | * settings |
1183 | */ | |
f976376d | 1184 | chan->flags = chan->orig_flags = |
038659e7 | 1185 | map_regdom_flags(reg_rule->flags) | bw_flags; |
f976376d LR |
1186 | chan->max_antenna_gain = chan->orig_mag = |
1187 | (int) MBI_TO_DBI(power_rule->max_antenna_gain); | |
279f0f55 | 1188 | chan->max_reg_power = chan->max_power = chan->orig_mpwr = |
f976376d | 1189 | (int) MBM_TO_DBM(power_rule->max_eirp); |
4f267c11 JD |
1190 | |
1191 | if (chan->flags & IEEE80211_CHAN_RADAR) { | |
1192 | chan->dfs_cac_ms = IEEE80211_DFS_MIN_CAC_TIME_MS; | |
1193 | if (reg_rule->dfs_cac_ms) | |
1194 | chan->dfs_cac_ms = reg_rule->dfs_cac_ms; | |
1195 | } | |
1196 | ||
f976376d LR |
1197 | return; |
1198 | } | |
1199 | ||
04f39047 SW |
1200 | chan->dfs_state = NL80211_DFS_USABLE; |
1201 | chan->dfs_state_entered = jiffies; | |
1202 | ||
aa3d7eef | 1203 | chan->beacon_found = false; |
038659e7 | 1204 | chan->flags = flags | bw_flags | map_regdom_flags(reg_rule->flags); |
1a919318 JB |
1205 | chan->max_antenna_gain = |
1206 | min_t(int, chan->orig_mag, | |
1207 | MBI_TO_DBI(power_rule->max_antenna_gain)); | |
eccc068e | 1208 | chan->max_reg_power = (int) MBM_TO_DBM(power_rule->max_eirp); |
089027e5 JD |
1209 | |
1210 | if (chan->flags & IEEE80211_CHAN_RADAR) { | |
1211 | if (reg_rule->dfs_cac_ms) | |
1212 | chan->dfs_cac_ms = reg_rule->dfs_cac_ms; | |
1213 | else | |
1214 | chan->dfs_cac_ms = IEEE80211_DFS_MIN_CAC_TIME_MS; | |
1215 | } | |
1216 | ||
5e31fc08 SG |
1217 | if (chan->orig_mpwr) { |
1218 | /* | |
a09a85a0 LR |
1219 | * Devices that use REGULATORY_COUNTRY_IE_FOLLOW_POWER |
1220 | * will always follow the passed country IE power settings. | |
5e31fc08 SG |
1221 | */ |
1222 | if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE && | |
a09a85a0 | 1223 | wiphy->regulatory_flags & REGULATORY_COUNTRY_IE_FOLLOW_POWER) |
5e31fc08 SG |
1224 | chan->max_power = chan->max_reg_power; |
1225 | else | |
1226 | chan->max_power = min(chan->orig_mpwr, | |
1227 | chan->max_reg_power); | |
1228 | } else | |
1229 | chan->max_power = chan->max_reg_power; | |
8318d78a JB |
1230 | } |
1231 | ||
7ca43d03 | 1232 | static void handle_band(struct wiphy *wiphy, |
fdc9d7b2 JB |
1233 | enum nl80211_reg_initiator initiator, |
1234 | struct ieee80211_supported_band *sband) | |
8318d78a | 1235 | { |
a92a3ce7 | 1236 | unsigned int i; |
a92a3ce7 | 1237 | |
fdc9d7b2 JB |
1238 | if (!sband) |
1239 | return; | |
8318d78a JB |
1240 | |
1241 | for (i = 0; i < sband->n_channels; i++) | |
fdc9d7b2 | 1242 | handle_channel(wiphy, initiator, &sband->channels[i]); |
8318d78a JB |
1243 | } |
1244 | ||
57b5ce07 LR |
1245 | static bool reg_request_cell_base(struct regulatory_request *request) |
1246 | { | |
1247 | if (request->initiator != NL80211_REGDOM_SET_BY_USER) | |
1248 | return false; | |
1a919318 | 1249 | return request->user_reg_hint_type == NL80211_USER_REG_HINT_CELL_BASE; |
57b5ce07 LR |
1250 | } |
1251 | ||
1252 | bool reg_last_request_cell_base(void) | |
1253 | { | |
38fd2143 | 1254 | return reg_request_cell_base(get_last_request()); |
57b5ce07 LR |
1255 | } |
1256 | ||
94fc661f | 1257 | #ifdef CONFIG_CFG80211_REG_CELLULAR_HINTS |
57b5ce07 | 1258 | /* Core specific check */ |
2f92212b JB |
1259 | static enum reg_request_treatment |
1260 | reg_ignore_cell_hint(struct regulatory_request *pending_request) | |
57b5ce07 | 1261 | { |
c492db37 JB |
1262 | struct regulatory_request *lr = get_last_request(); |
1263 | ||
57b5ce07 | 1264 | if (!reg_num_devs_support_basehint) |
2f92212b | 1265 | return REG_REQ_IGNORE; |
57b5ce07 | 1266 | |
c492db37 | 1267 | if (reg_request_cell_base(lr) && |
1a919318 | 1268 | !regdom_changes(pending_request->alpha2)) |
2f92212b | 1269 | return REG_REQ_ALREADY_SET; |
1a919318 | 1270 | |
2f92212b | 1271 | return REG_REQ_OK; |
57b5ce07 LR |
1272 | } |
1273 | ||
1274 | /* Device specific check */ | |
1275 | static bool reg_dev_ignore_cell_hint(struct wiphy *wiphy) | |
1276 | { | |
1a919318 | 1277 | return !(wiphy->features & NL80211_FEATURE_CELL_BASE_REG_HINTS); |
57b5ce07 LR |
1278 | } |
1279 | #else | |
1280 | static int reg_ignore_cell_hint(struct regulatory_request *pending_request) | |
1281 | { | |
2f92212b | 1282 | return REG_REQ_IGNORE; |
57b5ce07 | 1283 | } |
1a919318 JB |
1284 | |
1285 | static bool reg_dev_ignore_cell_hint(struct wiphy *wiphy) | |
57b5ce07 LR |
1286 | { |
1287 | return true; | |
1288 | } | |
1289 | #endif | |
1290 | ||
fa1fb9cb LR |
1291 | static bool wiphy_strict_alpha2_regd(struct wiphy *wiphy) |
1292 | { | |
a2f73b6c LR |
1293 | if (wiphy->regulatory_flags & REGULATORY_STRICT_REG && |
1294 | !(wiphy->regulatory_flags & REGULATORY_CUSTOM_REG)) | |
fa1fb9cb LR |
1295 | return true; |
1296 | return false; | |
1297 | } | |
57b5ce07 | 1298 | |
7db90f4a LR |
1299 | static bool ignore_reg_update(struct wiphy *wiphy, |
1300 | enum nl80211_reg_initiator initiator) | |
14b9815a | 1301 | { |
c492db37 JB |
1302 | struct regulatory_request *lr = get_last_request(); |
1303 | ||
b0d7aa59 JD |
1304 | if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) |
1305 | return true; | |
1306 | ||
c492db37 | 1307 | if (!lr) { |
034c6d6e LR |
1308 | REG_DBG_PRINT("Ignoring regulatory request set by %s " |
1309 | "since last_request is not set\n", | |
926a0a09 | 1310 | reg_initiator_name(initiator)); |
14b9815a | 1311 | return true; |
926a0a09 LR |
1312 | } |
1313 | ||
7db90f4a | 1314 | if (initiator == NL80211_REGDOM_SET_BY_CORE && |
a2f73b6c | 1315 | wiphy->regulatory_flags & REGULATORY_CUSTOM_REG) { |
034c6d6e LR |
1316 | REG_DBG_PRINT("Ignoring regulatory request set by %s " |
1317 | "since the driver uses its own custom " | |
1318 | "regulatory domain\n", | |
926a0a09 | 1319 | reg_initiator_name(initiator)); |
14b9815a | 1320 | return true; |
926a0a09 LR |
1321 | } |
1322 | ||
fb1fc7ad LR |
1323 | /* |
1324 | * wiphy->regd will be set once the device has its own | |
1325 | * desired regulatory domain set | |
1326 | */ | |
fa1fb9cb | 1327 | if (wiphy_strict_alpha2_regd(wiphy) && !wiphy->regd && |
749b527b | 1328 | initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && |
c492db37 | 1329 | !is_world_regdom(lr->alpha2)) { |
034c6d6e LR |
1330 | REG_DBG_PRINT("Ignoring regulatory request set by %s " |
1331 | "since the driver requires its own regulatory " | |
1332 | "domain to be set first\n", | |
926a0a09 | 1333 | reg_initiator_name(initiator)); |
14b9815a | 1334 | return true; |
926a0a09 LR |
1335 | } |
1336 | ||
c492db37 | 1337 | if (reg_request_cell_base(lr)) |
57b5ce07 LR |
1338 | return reg_dev_ignore_cell_hint(wiphy); |
1339 | ||
14b9815a LR |
1340 | return false; |
1341 | } | |
1342 | ||
3195e489 LR |
1343 | static bool reg_is_world_roaming(struct wiphy *wiphy) |
1344 | { | |
1345 | const struct ieee80211_regdomain *cr = get_cfg80211_regdom(); | |
1346 | const struct ieee80211_regdomain *wr = get_wiphy_regdom(wiphy); | |
1347 | struct regulatory_request *lr = get_last_request(); | |
1348 | ||
1349 | if (is_world_regdom(cr->alpha2) || (wr && is_world_regdom(wr->alpha2))) | |
1350 | return true; | |
1351 | ||
1352 | if (lr && lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && | |
a2f73b6c | 1353 | wiphy->regulatory_flags & REGULATORY_CUSTOM_REG) |
3195e489 LR |
1354 | return true; |
1355 | ||
1356 | return false; | |
1357 | } | |
1358 | ||
1a919318 | 1359 | static void handle_reg_beacon(struct wiphy *wiphy, unsigned int chan_idx, |
e38f8a7a LR |
1360 | struct reg_beacon *reg_beacon) |
1361 | { | |
e38f8a7a LR |
1362 | struct ieee80211_supported_band *sband; |
1363 | struct ieee80211_channel *chan; | |
6bad8766 LR |
1364 | bool channel_changed = false; |
1365 | struct ieee80211_channel chan_before; | |
e38f8a7a | 1366 | |
e38f8a7a LR |
1367 | sband = wiphy->bands[reg_beacon->chan.band]; |
1368 | chan = &sband->channels[chan_idx]; | |
1369 | ||
1370 | if (likely(chan->center_freq != reg_beacon->chan.center_freq)) | |
1371 | return; | |
1372 | ||
6bad8766 LR |
1373 | if (chan->beacon_found) |
1374 | return; | |
1375 | ||
1376 | chan->beacon_found = true; | |
1377 | ||
0f500a5f LR |
1378 | if (!reg_is_world_roaming(wiphy)) |
1379 | return; | |
1380 | ||
a2f73b6c | 1381 | if (wiphy->regulatory_flags & REGULATORY_DISABLE_BEACON_HINTS) |
37184244 LR |
1382 | return; |
1383 | ||
6bad8766 LR |
1384 | chan_before.center_freq = chan->center_freq; |
1385 | chan_before.flags = chan->flags; | |
1386 | ||
8fe02e16 LR |
1387 | if (chan->flags & IEEE80211_CHAN_NO_IR) { |
1388 | chan->flags &= ~IEEE80211_CHAN_NO_IR; | |
6bad8766 | 1389 | channel_changed = true; |
e38f8a7a LR |
1390 | } |
1391 | ||
6bad8766 LR |
1392 | if (channel_changed) |
1393 | nl80211_send_beacon_hint_event(wiphy, &chan_before, chan); | |
e38f8a7a LR |
1394 | } |
1395 | ||
1396 | /* | |
1397 | * Called when a scan on a wiphy finds a beacon on | |
1398 | * new channel | |
1399 | */ | |
1400 | static void wiphy_update_new_beacon(struct wiphy *wiphy, | |
1401 | struct reg_beacon *reg_beacon) | |
1402 | { | |
1403 | unsigned int i; | |
1404 | struct ieee80211_supported_band *sband; | |
1405 | ||
e38f8a7a LR |
1406 | if (!wiphy->bands[reg_beacon->chan.band]) |
1407 | return; | |
1408 | ||
1409 | sband = wiphy->bands[reg_beacon->chan.band]; | |
1410 | ||
1411 | for (i = 0; i < sband->n_channels; i++) | |
1412 | handle_reg_beacon(wiphy, i, reg_beacon); | |
1413 | } | |
1414 | ||
1415 | /* | |
1416 | * Called upon reg changes or a new wiphy is added | |
1417 | */ | |
1418 | static void wiphy_update_beacon_reg(struct wiphy *wiphy) | |
1419 | { | |
1420 | unsigned int i; | |
1421 | struct ieee80211_supported_band *sband; | |
1422 | struct reg_beacon *reg_beacon; | |
1423 | ||
e38f8a7a LR |
1424 | list_for_each_entry(reg_beacon, ®_beacon_list, list) { |
1425 | if (!wiphy->bands[reg_beacon->chan.band]) | |
1426 | continue; | |
1427 | sband = wiphy->bands[reg_beacon->chan.band]; | |
1428 | for (i = 0; i < sband->n_channels; i++) | |
1429 | handle_reg_beacon(wiphy, i, reg_beacon); | |
1430 | } | |
1431 | } | |
1432 | ||
e38f8a7a LR |
1433 | /* Reap the advantages of previously found beacons */ |
1434 | static void reg_process_beacons(struct wiphy *wiphy) | |
1435 | { | |
b1ed8ddd LR |
1436 | /* |
1437 | * Means we are just firing up cfg80211, so no beacons would | |
1438 | * have been processed yet. | |
1439 | */ | |
1440 | if (!last_request) | |
1441 | return; | |
e38f8a7a LR |
1442 | wiphy_update_beacon_reg(wiphy); |
1443 | } | |
1444 | ||
1a919318 | 1445 | static bool is_ht40_allowed(struct ieee80211_channel *chan) |
038659e7 LR |
1446 | { |
1447 | if (!chan) | |
1a919318 | 1448 | return false; |
038659e7 | 1449 | if (chan->flags & IEEE80211_CHAN_DISABLED) |
1a919318 | 1450 | return false; |
038659e7 | 1451 | /* This would happen when regulatory rules disallow HT40 completely */ |
55b183ad FF |
1452 | if ((chan->flags & IEEE80211_CHAN_NO_HT40) == IEEE80211_CHAN_NO_HT40) |
1453 | return false; | |
1454 | return true; | |
038659e7 LR |
1455 | } |
1456 | ||
1457 | static void reg_process_ht_flags_channel(struct wiphy *wiphy, | |
fdc9d7b2 | 1458 | struct ieee80211_channel *channel) |
038659e7 | 1459 | { |
fdc9d7b2 | 1460 | struct ieee80211_supported_band *sband = wiphy->bands[channel->band]; |
038659e7 LR |
1461 | struct ieee80211_channel *channel_before = NULL, *channel_after = NULL; |
1462 | unsigned int i; | |
1463 | ||
1a919318 | 1464 | if (!is_ht40_allowed(channel)) { |
038659e7 LR |
1465 | channel->flags |= IEEE80211_CHAN_NO_HT40; |
1466 | return; | |
1467 | } | |
1468 | ||
1469 | /* | |
1470 | * We need to ensure the extension channels exist to | |
1471 | * be able to use HT40- or HT40+, this finds them (or not) | |
1472 | */ | |
1473 | for (i = 0; i < sband->n_channels; i++) { | |
1474 | struct ieee80211_channel *c = &sband->channels[i]; | |
1a919318 | 1475 | |
038659e7 LR |
1476 | if (c->center_freq == (channel->center_freq - 20)) |
1477 | channel_before = c; | |
1478 | if (c->center_freq == (channel->center_freq + 20)) | |
1479 | channel_after = c; | |
1480 | } | |
1481 | ||
1482 | /* | |
1483 | * Please note that this assumes target bandwidth is 20 MHz, | |
1484 | * if that ever changes we also need to change the below logic | |
1485 | * to include that as well. | |
1486 | */ | |
1a919318 | 1487 | if (!is_ht40_allowed(channel_before)) |
689da1b3 | 1488 | channel->flags |= IEEE80211_CHAN_NO_HT40MINUS; |
038659e7 | 1489 | else |
689da1b3 | 1490 | channel->flags &= ~IEEE80211_CHAN_NO_HT40MINUS; |
038659e7 | 1491 | |
1a919318 | 1492 | if (!is_ht40_allowed(channel_after)) |
689da1b3 | 1493 | channel->flags |= IEEE80211_CHAN_NO_HT40PLUS; |
038659e7 | 1494 | else |
689da1b3 | 1495 | channel->flags &= ~IEEE80211_CHAN_NO_HT40PLUS; |
038659e7 LR |
1496 | } |
1497 | ||
1498 | static void reg_process_ht_flags_band(struct wiphy *wiphy, | |
fdc9d7b2 | 1499 | struct ieee80211_supported_band *sband) |
038659e7 LR |
1500 | { |
1501 | unsigned int i; | |
038659e7 | 1502 | |
fdc9d7b2 JB |
1503 | if (!sband) |
1504 | return; | |
038659e7 LR |
1505 | |
1506 | for (i = 0; i < sband->n_channels; i++) | |
fdc9d7b2 | 1507 | reg_process_ht_flags_channel(wiphy, &sband->channels[i]); |
038659e7 LR |
1508 | } |
1509 | ||
1510 | static void reg_process_ht_flags(struct wiphy *wiphy) | |
1511 | { | |
1512 | enum ieee80211_band band; | |
1513 | ||
1514 | if (!wiphy) | |
1515 | return; | |
1516 | ||
fdc9d7b2 JB |
1517 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) |
1518 | reg_process_ht_flags_band(wiphy, wiphy->bands[band]); | |
038659e7 LR |
1519 | } |
1520 | ||
0e3802db LR |
1521 | static void reg_call_notifier(struct wiphy *wiphy, |
1522 | struct regulatory_request *request) | |
1523 | { | |
1524 | if (wiphy->reg_notifier) | |
1525 | wiphy->reg_notifier(wiphy, request); | |
1526 | } | |
1527 | ||
ad932f04 AN |
1528 | static bool reg_wdev_chan_valid(struct wiphy *wiphy, struct wireless_dev *wdev) |
1529 | { | |
ad932f04 AN |
1530 | struct cfg80211_chan_def chandef; |
1531 | struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); | |
20658702 | 1532 | enum nl80211_iftype iftype; |
ad932f04 AN |
1533 | |
1534 | wdev_lock(wdev); | |
20658702 | 1535 | iftype = wdev->iftype; |
ad932f04 | 1536 | |
20658702 | 1537 | /* make sure the interface is active */ |
ad932f04 | 1538 | if (!wdev->netdev || !netif_running(wdev->netdev)) |
20658702 | 1539 | goto wdev_inactive_unlock; |
ad932f04 | 1540 | |
20658702 | 1541 | switch (iftype) { |
ad932f04 AN |
1542 | case NL80211_IFTYPE_AP: |
1543 | case NL80211_IFTYPE_P2P_GO: | |
1544 | if (!wdev->beacon_interval) | |
20658702 AN |
1545 | goto wdev_inactive_unlock; |
1546 | chandef = wdev->chandef; | |
185076d6 AN |
1547 | break; |
1548 | case NL80211_IFTYPE_ADHOC: | |
1549 | if (!wdev->ssid_len) | |
20658702 AN |
1550 | goto wdev_inactive_unlock; |
1551 | chandef = wdev->chandef; | |
ad932f04 AN |
1552 | break; |
1553 | case NL80211_IFTYPE_STATION: | |
1554 | case NL80211_IFTYPE_P2P_CLIENT: | |
ad932f04 AN |
1555 | if (!wdev->current_bss || |
1556 | !wdev->current_bss->pub.channel) | |
20658702 | 1557 | goto wdev_inactive_unlock; |
ad932f04 | 1558 | |
20658702 AN |
1559 | if (!rdev->ops->get_channel || |
1560 | rdev_get_channel(rdev, wdev, &chandef)) | |
1561 | cfg80211_chandef_create(&chandef, | |
1562 | wdev->current_bss->pub.channel, | |
1563 | NL80211_CHAN_NO_HT); | |
ad932f04 AN |
1564 | break; |
1565 | case NL80211_IFTYPE_MONITOR: | |
1566 | case NL80211_IFTYPE_AP_VLAN: | |
1567 | case NL80211_IFTYPE_P2P_DEVICE: | |
1568 | /* no enforcement required */ | |
1569 | break; | |
1570 | default: | |
1571 | /* others not implemented for now */ | |
1572 | WARN_ON(1); | |
1573 | break; | |
1574 | } | |
1575 | ||
ad932f04 | 1576 | wdev_unlock(wdev); |
20658702 AN |
1577 | |
1578 | switch (iftype) { | |
1579 | case NL80211_IFTYPE_AP: | |
1580 | case NL80211_IFTYPE_P2P_GO: | |
1581 | case NL80211_IFTYPE_ADHOC: | |
1582 | return cfg80211_reg_can_beacon(wiphy, &chandef, iftype); | |
1583 | case NL80211_IFTYPE_STATION: | |
1584 | case NL80211_IFTYPE_P2P_CLIENT: | |
1585 | return cfg80211_chandef_usable(wiphy, &chandef, | |
1586 | IEEE80211_CHAN_DISABLED); | |
1587 | default: | |
1588 | break; | |
1589 | } | |
1590 | ||
1591 | return true; | |
1592 | ||
1593 | wdev_inactive_unlock: | |
1594 | wdev_unlock(wdev); | |
1595 | return true; | |
ad932f04 AN |
1596 | } |
1597 | ||
1598 | static void reg_leave_invalid_chans(struct wiphy *wiphy) | |
1599 | { | |
1600 | struct wireless_dev *wdev; | |
1601 | struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); | |
1602 | ||
1603 | ASSERT_RTNL(); | |
1604 | ||
1605 | list_for_each_entry(wdev, &rdev->wdev_list, list) | |
1606 | if (!reg_wdev_chan_valid(wiphy, wdev)) | |
1607 | cfg80211_leave(rdev, wdev); | |
1608 | } | |
1609 | ||
1610 | static void reg_check_chans_work(struct work_struct *work) | |
1611 | { | |
1612 | struct cfg80211_registered_device *rdev; | |
1613 | ||
1614 | REG_DBG_PRINT("Verifying active interfaces after reg change\n"); | |
1615 | rtnl_lock(); | |
1616 | ||
1617 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) | |
1618 | if (!(rdev->wiphy.regulatory_flags & | |
1619 | REGULATORY_IGNORE_STALE_KICKOFF)) | |
1620 | reg_leave_invalid_chans(&rdev->wiphy); | |
1621 | ||
1622 | rtnl_unlock(); | |
1623 | } | |
1624 | ||
1625 | static void reg_check_channels(void) | |
1626 | { | |
1627 | /* | |
1628 | * Give usermode a chance to do something nicer (move to another | |
1629 | * channel, orderly disconnection), before forcing a disconnection. | |
1630 | */ | |
1631 | mod_delayed_work(system_power_efficient_wq, | |
1632 | ®_check_chans, | |
1633 | msecs_to_jiffies(REG_ENFORCE_GRACE_MS)); | |
1634 | } | |
1635 | ||
eac03e38 SN |
1636 | static void wiphy_update_regulatory(struct wiphy *wiphy, |
1637 | enum nl80211_reg_initiator initiator) | |
b2e1b302 LR |
1638 | { |
1639 | enum ieee80211_band band; | |
c492db37 | 1640 | struct regulatory_request *lr = get_last_request(); |
eac03e38 | 1641 | |
0e3802db LR |
1642 | if (ignore_reg_update(wiphy, initiator)) { |
1643 | /* | |
1644 | * Regulatory updates set by CORE are ignored for custom | |
1645 | * regulatory cards. Let us notify the changes to the driver, | |
1646 | * as some drivers used this to restore its orig_* reg domain. | |
1647 | */ | |
1648 | if (initiator == NL80211_REGDOM_SET_BY_CORE && | |
a2f73b6c | 1649 | wiphy->regulatory_flags & REGULATORY_CUSTOM_REG) |
0e3802db | 1650 | reg_call_notifier(wiphy, lr); |
a203c2aa | 1651 | return; |
0e3802db | 1652 | } |
a203c2aa | 1653 | |
c492db37 | 1654 | lr->dfs_region = get_cfg80211_regdom()->dfs_region; |
b68e6b3b | 1655 | |
fdc9d7b2 JB |
1656 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) |
1657 | handle_band(wiphy, initiator, wiphy->bands[band]); | |
a203c2aa | 1658 | |
e38f8a7a | 1659 | reg_process_beacons(wiphy); |
038659e7 | 1660 | reg_process_ht_flags(wiphy); |
0e3802db | 1661 | reg_call_notifier(wiphy, lr); |
b2e1b302 LR |
1662 | } |
1663 | ||
d7549cbb SN |
1664 | static void update_all_wiphy_regulatory(enum nl80211_reg_initiator initiator) |
1665 | { | |
1666 | struct cfg80211_registered_device *rdev; | |
4a38994f | 1667 | struct wiphy *wiphy; |
d7549cbb | 1668 | |
5fe231e8 | 1669 | ASSERT_RTNL(); |
458f4f9e | 1670 | |
4a38994f RM |
1671 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) { |
1672 | wiphy = &rdev->wiphy; | |
1673 | wiphy_update_regulatory(wiphy, initiator); | |
4a38994f | 1674 | } |
ad932f04 AN |
1675 | |
1676 | reg_check_channels(); | |
d7549cbb SN |
1677 | } |
1678 | ||
1fa25e41 | 1679 | static void handle_channel_custom(struct wiphy *wiphy, |
fdc9d7b2 | 1680 | struct ieee80211_channel *chan, |
1fa25e41 LR |
1681 | const struct ieee80211_regdomain *regd) |
1682 | { | |
038659e7 | 1683 | u32 bw_flags = 0; |
1fa25e41 LR |
1684 | const struct ieee80211_reg_rule *reg_rule = NULL; |
1685 | const struct ieee80211_power_rule *power_rule = NULL; | |
038659e7 | 1686 | const struct ieee80211_freq_range *freq_range = NULL; |
97524820 | 1687 | u32 max_bandwidth_khz; |
ac46d48e | 1688 | |
361c9c8b JB |
1689 | reg_rule = freq_reg_info_regd(wiphy, MHZ_TO_KHZ(chan->center_freq), |
1690 | regd); | |
1fa25e41 | 1691 | |
361c9c8b | 1692 | if (IS_ERR(reg_rule)) { |
fe7ef5e9 JB |
1693 | REG_DBG_PRINT("Disabling freq %d MHz as custom regd has no rule that fits it\n", |
1694 | chan->center_freq); | |
db8dfee5 AN |
1695 | if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) { |
1696 | chan->flags |= IEEE80211_CHAN_DISABLED; | |
1697 | } else { | |
1698 | chan->orig_flags |= IEEE80211_CHAN_DISABLED; | |
1699 | chan->flags = chan->orig_flags; | |
1700 | } | |
1fa25e41 LR |
1701 | return; |
1702 | } | |
1703 | ||
b0dfd2ea | 1704 | chan_reg_rule_print_dbg(regd, chan, reg_rule); |
e702d3cf | 1705 | |
1fa25e41 | 1706 | power_rule = ®_rule->power_rule; |
038659e7 LR |
1707 | freq_range = ®_rule->freq_range; |
1708 | ||
97524820 JD |
1709 | max_bandwidth_khz = freq_range->max_bandwidth_khz; |
1710 | /* Check if auto calculation requested */ | |
b0dfd2ea | 1711 | if (reg_rule->flags & NL80211_RRF_AUTO_BW) |
97524820 JD |
1712 | max_bandwidth_khz = reg_get_max_bandwidth(regd, reg_rule); |
1713 | ||
1714 | if (max_bandwidth_khz < MHZ_TO_KHZ(40)) | |
e33e2241 | 1715 | bw_flags = IEEE80211_CHAN_NO_HT40; |
97524820 | 1716 | if (max_bandwidth_khz < MHZ_TO_KHZ(80)) |
c7a6ee27 | 1717 | bw_flags |= IEEE80211_CHAN_NO_80MHZ; |
97524820 | 1718 | if (max_bandwidth_khz < MHZ_TO_KHZ(160)) |
c7a6ee27 | 1719 | bw_flags |= IEEE80211_CHAN_NO_160MHZ; |
1fa25e41 | 1720 | |
2e18b38f | 1721 | chan->dfs_state_entered = jiffies; |
c7ab5081 AN |
1722 | chan->dfs_state = NL80211_DFS_USABLE; |
1723 | ||
1724 | chan->beacon_found = false; | |
db8dfee5 AN |
1725 | |
1726 | if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) | |
1727 | chan->flags = chan->orig_flags | bw_flags | | |
1728 | map_regdom_flags(reg_rule->flags); | |
1729 | else | |
1730 | chan->flags |= map_regdom_flags(reg_rule->flags) | bw_flags; | |
1731 | ||
1fa25e41 | 1732 | chan->max_antenna_gain = (int) MBI_TO_DBI(power_rule->max_antenna_gain); |
279f0f55 FF |
1733 | chan->max_reg_power = chan->max_power = |
1734 | (int) MBM_TO_DBM(power_rule->max_eirp); | |
2e18b38f AN |
1735 | |
1736 | if (chan->flags & IEEE80211_CHAN_RADAR) { | |
1737 | if (reg_rule->dfs_cac_ms) | |
1738 | chan->dfs_cac_ms = reg_rule->dfs_cac_ms; | |
1739 | else | |
1740 | chan->dfs_cac_ms = IEEE80211_DFS_MIN_CAC_TIME_MS; | |
1741 | } | |
1742 | ||
1743 | chan->max_power = chan->max_reg_power; | |
1fa25e41 LR |
1744 | } |
1745 | ||
fdc9d7b2 JB |
1746 | static void handle_band_custom(struct wiphy *wiphy, |
1747 | struct ieee80211_supported_band *sband, | |
1fa25e41 LR |
1748 | const struct ieee80211_regdomain *regd) |
1749 | { | |
1750 | unsigned int i; | |
1fa25e41 | 1751 | |
fdc9d7b2 JB |
1752 | if (!sband) |
1753 | return; | |
1fa25e41 LR |
1754 | |
1755 | for (i = 0; i < sband->n_channels; i++) | |
fdc9d7b2 | 1756 | handle_channel_custom(wiphy, &sband->channels[i], regd); |
1fa25e41 LR |
1757 | } |
1758 | ||
1759 | /* Used by drivers prior to wiphy registration */ | |
1760 | void wiphy_apply_custom_regulatory(struct wiphy *wiphy, | |
1761 | const struct ieee80211_regdomain *regd) | |
1762 | { | |
1763 | enum ieee80211_band band; | |
bbcf3f02 | 1764 | unsigned int bands_set = 0; |
ac46d48e | 1765 | |
a2f73b6c LR |
1766 | WARN(!(wiphy->regulatory_flags & REGULATORY_CUSTOM_REG), |
1767 | "wiphy should have REGULATORY_CUSTOM_REG\n"); | |
1768 | wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG; | |
222ea581 | 1769 | |
1fa25e41 | 1770 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) { |
bbcf3f02 LR |
1771 | if (!wiphy->bands[band]) |
1772 | continue; | |
fdc9d7b2 | 1773 | handle_band_custom(wiphy, wiphy->bands[band], regd); |
bbcf3f02 | 1774 | bands_set++; |
b2e1b302 | 1775 | } |
bbcf3f02 LR |
1776 | |
1777 | /* | |
1778 | * no point in calling this if it won't have any effect | |
1a919318 | 1779 | * on your device's supported bands. |
bbcf3f02 LR |
1780 | */ |
1781 | WARN_ON(!bands_set); | |
b2e1b302 | 1782 | } |
1fa25e41 LR |
1783 | EXPORT_SYMBOL(wiphy_apply_custom_regulatory); |
1784 | ||
b2e253cf LR |
1785 | static void reg_set_request_processed(void) |
1786 | { | |
1787 | bool need_more_processing = false; | |
c492db37 | 1788 | struct regulatory_request *lr = get_last_request(); |
b2e253cf | 1789 | |
c492db37 | 1790 | lr->processed = true; |
b2e253cf LR |
1791 | |
1792 | spin_lock(®_requests_lock); | |
1793 | if (!list_empty(®_requests_list)) | |
1794 | need_more_processing = true; | |
1795 | spin_unlock(®_requests_lock); | |
1796 | ||
eeca9fce | 1797 | cancel_delayed_work(®_timeout); |
a90c7a31 | 1798 | |
b2e253cf LR |
1799 | if (need_more_processing) |
1800 | schedule_work(®_work); | |
1801 | } | |
1802 | ||
b3eb7f3f LR |
1803 | /** |
1804 | * reg_process_hint_core - process core regulatory requests | |
1805 | * @pending_request: a pending core regulatory request | |
1806 | * | |
1807 | * The wireless subsystem can use this function to process | |
1808 | * a regulatory request issued by the regulatory core. | |
1809 | * | |
1810 | * Returns one of the different reg request treatment values. | |
1811 | */ | |
1812 | static enum reg_request_treatment | |
1813 | reg_process_hint_core(struct regulatory_request *core_request) | |
1814 | { | |
b3eb7f3f LR |
1815 | |
1816 | core_request->intersect = false; | |
1817 | core_request->processed = false; | |
5ad6ef5e | 1818 | |
05f1a3ea | 1819 | reg_update_last_request(core_request); |
b3eb7f3f | 1820 | |
fe6631ff | 1821 | return reg_call_crda(core_request); |
b3eb7f3f LR |
1822 | } |
1823 | ||
0d97a619 LR |
1824 | static enum reg_request_treatment |
1825 | __reg_process_hint_user(struct regulatory_request *user_request) | |
1826 | { | |
1827 | struct regulatory_request *lr = get_last_request(); | |
1828 | ||
1829 | if (reg_request_cell_base(user_request)) | |
1830 | return reg_ignore_cell_hint(user_request); | |
1831 | ||
1832 | if (reg_request_cell_base(lr)) | |
1833 | return REG_REQ_IGNORE; | |
1834 | ||
1835 | if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) | |
1836 | return REG_REQ_INTERSECT; | |
1837 | /* | |
1838 | * If the user knows better the user should set the regdom | |
1839 | * to their country before the IE is picked up | |
1840 | */ | |
1841 | if (lr->initiator == NL80211_REGDOM_SET_BY_USER && | |
1842 | lr->intersect) | |
1843 | return REG_REQ_IGNORE; | |
1844 | /* | |
1845 | * Process user requests only after previous user/driver/core | |
1846 | * requests have been processed | |
1847 | */ | |
1848 | if ((lr->initiator == NL80211_REGDOM_SET_BY_CORE || | |
1849 | lr->initiator == NL80211_REGDOM_SET_BY_DRIVER || | |
1850 | lr->initiator == NL80211_REGDOM_SET_BY_USER) && | |
1851 | regdom_changes(lr->alpha2)) | |
1852 | return REG_REQ_IGNORE; | |
1853 | ||
1854 | if (!regdom_changes(user_request->alpha2)) | |
1855 | return REG_REQ_ALREADY_SET; | |
1856 | ||
1857 | return REG_REQ_OK; | |
1858 | } | |
1859 | ||
1860 | /** | |
1861 | * reg_process_hint_user - process user regulatory requests | |
1862 | * @user_request: a pending user regulatory request | |
1863 | * | |
1864 | * The wireless subsystem can use this function to process | |
1865 | * a regulatory request initiated by userspace. | |
1866 | * | |
1867 | * Returns one of the different reg request treatment values. | |
1868 | */ | |
1869 | static enum reg_request_treatment | |
1870 | reg_process_hint_user(struct regulatory_request *user_request) | |
1871 | { | |
1872 | enum reg_request_treatment treatment; | |
0d97a619 LR |
1873 | |
1874 | treatment = __reg_process_hint_user(user_request); | |
1875 | if (treatment == REG_REQ_IGNORE || | |
0c4ddcd2 | 1876 | treatment == REG_REQ_ALREADY_SET) { |
c888393b | 1877 | reg_free_request(user_request); |
0d97a619 LR |
1878 | return treatment; |
1879 | } | |
1880 | ||
0d97a619 LR |
1881 | user_request->intersect = treatment == REG_REQ_INTERSECT; |
1882 | user_request->processed = false; | |
5ad6ef5e | 1883 | |
05f1a3ea | 1884 | reg_update_last_request(user_request); |
0d97a619 LR |
1885 | |
1886 | user_alpha2[0] = user_request->alpha2[0]; | |
1887 | user_alpha2[1] = user_request->alpha2[1]; | |
1888 | ||
fe6631ff | 1889 | return reg_call_crda(user_request); |
0d97a619 LR |
1890 | } |
1891 | ||
21636c7f LR |
1892 | static enum reg_request_treatment |
1893 | __reg_process_hint_driver(struct regulatory_request *driver_request) | |
1894 | { | |
1895 | struct regulatory_request *lr = get_last_request(); | |
1896 | ||
1897 | if (lr->initiator == NL80211_REGDOM_SET_BY_CORE) { | |
1898 | if (regdom_changes(driver_request->alpha2)) | |
1899 | return REG_REQ_OK; | |
1900 | return REG_REQ_ALREADY_SET; | |
1901 | } | |
1902 | ||
1903 | /* | |
1904 | * This would happen if you unplug and plug your card | |
1905 | * back in or if you add a new device for which the previously | |
1906 | * loaded card also agrees on the regulatory domain. | |
1907 | */ | |
1908 | if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER && | |
1909 | !regdom_changes(driver_request->alpha2)) | |
1910 | return REG_REQ_ALREADY_SET; | |
1911 | ||
1912 | return REG_REQ_INTERSECT; | |
1913 | } | |
1914 | ||
1915 | /** | |
1916 | * reg_process_hint_driver - process driver regulatory requests | |
1917 | * @driver_request: a pending driver regulatory request | |
1918 | * | |
1919 | * The wireless subsystem can use this function to process | |
1920 | * a regulatory request issued by an 802.11 driver. | |
1921 | * | |
1922 | * Returns one of the different reg request treatment values. | |
1923 | */ | |
1924 | static enum reg_request_treatment | |
1925 | reg_process_hint_driver(struct wiphy *wiphy, | |
1926 | struct regulatory_request *driver_request) | |
1927 | { | |
34f05f54 | 1928 | const struct ieee80211_regdomain *regd, *tmp; |
21636c7f | 1929 | enum reg_request_treatment treatment; |
21636c7f LR |
1930 | |
1931 | treatment = __reg_process_hint_driver(driver_request); | |
1932 | ||
1933 | switch (treatment) { | |
1934 | case REG_REQ_OK: | |
1935 | break; | |
1936 | case REG_REQ_IGNORE: | |
c888393b | 1937 | reg_free_request(driver_request); |
21636c7f LR |
1938 | return treatment; |
1939 | case REG_REQ_INTERSECT: | |
1940 | /* fall through */ | |
1941 | case REG_REQ_ALREADY_SET: | |
1942 | regd = reg_copy_regd(get_cfg80211_regdom()); | |
1943 | if (IS_ERR(regd)) { | |
c888393b | 1944 | reg_free_request(driver_request); |
21636c7f LR |
1945 | return REG_REQ_IGNORE; |
1946 | } | |
34f05f54 AN |
1947 | |
1948 | tmp = get_wiphy_regdom(wiphy); | |
21636c7f | 1949 | rcu_assign_pointer(wiphy->regd, regd); |
34f05f54 | 1950 | rcu_free_regdom(tmp); |
21636c7f LR |
1951 | } |
1952 | ||
21636c7f LR |
1953 | |
1954 | driver_request->intersect = treatment == REG_REQ_INTERSECT; | |
1955 | driver_request->processed = false; | |
5ad6ef5e | 1956 | |
05f1a3ea | 1957 | reg_update_last_request(driver_request); |
21636c7f LR |
1958 | |
1959 | /* | |
1960 | * Since CRDA will not be called in this case as we already | |
1961 | * have applied the requested regulatory domain before we just | |
1962 | * inform userspace we have processed the request | |
1963 | */ | |
1964 | if (treatment == REG_REQ_ALREADY_SET) { | |
1965 | nl80211_send_reg_change_event(driver_request); | |
1966 | reg_set_request_processed(); | |
1967 | return treatment; | |
1968 | } | |
1969 | ||
fe6631ff | 1970 | return reg_call_crda(driver_request); |
21636c7f LR |
1971 | } |
1972 | ||
b23e7a9e LR |
1973 | static enum reg_request_treatment |
1974 | __reg_process_hint_country_ie(struct wiphy *wiphy, | |
1975 | struct regulatory_request *country_ie_request) | |
1976 | { | |
1977 | struct wiphy *last_wiphy = NULL; | |
1978 | struct regulatory_request *lr = get_last_request(); | |
1979 | ||
1980 | if (reg_request_cell_base(lr)) { | |
1981 | /* Trust a Cell base station over the AP's country IE */ | |
1982 | if (regdom_changes(country_ie_request->alpha2)) | |
1983 | return REG_REQ_IGNORE; | |
1984 | return REG_REQ_ALREADY_SET; | |
2a901468 LR |
1985 | } else { |
1986 | if (wiphy->regulatory_flags & REGULATORY_COUNTRY_IE_IGNORE) | |
1987 | return REG_REQ_IGNORE; | |
b23e7a9e LR |
1988 | } |
1989 | ||
b23e7a9e LR |
1990 | if (unlikely(!is_an_alpha2(country_ie_request->alpha2))) |
1991 | return -EINVAL; | |
2f1c6c57 LR |
1992 | |
1993 | if (lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE) | |
1994 | return REG_REQ_OK; | |
1995 | ||
1996 | last_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx); | |
1997 | ||
1998 | if (last_wiphy != wiphy) { | |
b23e7a9e | 1999 | /* |
2f1c6c57 LR |
2000 | * Two cards with two APs claiming different |
2001 | * Country IE alpha2s. We could | |
2002 | * intersect them, but that seems unlikely | |
2003 | * to be correct. Reject second one for now. | |
b23e7a9e | 2004 | */ |
2f1c6c57 LR |
2005 | if (regdom_changes(country_ie_request->alpha2)) |
2006 | return REG_REQ_IGNORE; | |
b23e7a9e LR |
2007 | return REG_REQ_ALREADY_SET; |
2008 | } | |
70dcec5a EG |
2009 | |
2010 | if (regdom_changes(country_ie_request->alpha2)) | |
2f1c6c57 LR |
2011 | return REG_REQ_OK; |
2012 | return REG_REQ_ALREADY_SET; | |
b23e7a9e LR |
2013 | } |
2014 | ||
d1c96a9a | 2015 | /** |
b23e7a9e LR |
2016 | * reg_process_hint_country_ie - process regulatory requests from country IEs |
2017 | * @country_ie_request: a regulatory request from a country IE | |
d1c96a9a | 2018 | * |
b23e7a9e LR |
2019 | * The wireless subsystem can use this function to process |
2020 | * a regulatory request issued by a country Information Element. | |
d1c96a9a | 2021 | * |
2f92212b | 2022 | * Returns one of the different reg request treatment values. |
d1c96a9a | 2023 | */ |
2f92212b | 2024 | static enum reg_request_treatment |
b23e7a9e LR |
2025 | reg_process_hint_country_ie(struct wiphy *wiphy, |
2026 | struct regulatory_request *country_ie_request) | |
b2e1b302 | 2027 | { |
2f92212b | 2028 | enum reg_request_treatment treatment; |
761cf7ec | 2029 | |
b23e7a9e | 2030 | treatment = __reg_process_hint_country_ie(wiphy, country_ie_request); |
9c96477d | 2031 | |
2f92212b | 2032 | switch (treatment) { |
2f92212b JB |
2033 | case REG_REQ_OK: |
2034 | break; | |
b23e7a9e LR |
2035 | case REG_REQ_IGNORE: |
2036 | /* fall through */ | |
2037 | case REG_REQ_ALREADY_SET: | |
c888393b | 2038 | reg_free_request(country_ie_request); |
b23e7a9e LR |
2039 | return treatment; |
2040 | case REG_REQ_INTERSECT: | |
c888393b | 2041 | reg_free_request(country_ie_request); |
fb1fc7ad | 2042 | /* |
b23e7a9e LR |
2043 | * This doesn't happen yet, not sure we |
2044 | * ever want to support it for this case. | |
fb1fc7ad | 2045 | */ |
b23e7a9e LR |
2046 | WARN_ONCE(1, "Unexpected intersection for country IEs"); |
2047 | return REG_REQ_IGNORE; | |
3e0c3ff3 | 2048 | } |
b2e1b302 | 2049 | |
b23e7a9e LR |
2050 | country_ie_request->intersect = false; |
2051 | country_ie_request->processed = false; | |
5ad6ef5e | 2052 | |
05f1a3ea | 2053 | reg_update_last_request(country_ie_request); |
3e0c3ff3 | 2054 | |
fe6631ff | 2055 | return reg_call_crda(country_ie_request); |
b2e1b302 LR |
2056 | } |
2057 | ||
30a548c7 | 2058 | /* This processes *all* regulatory hints */ |
1daa37c7 | 2059 | static void reg_process_hint(struct regulatory_request *reg_request) |
fe33eb39 | 2060 | { |
fe33eb39 | 2061 | struct wiphy *wiphy = NULL; |
b3eb7f3f | 2062 | enum reg_request_treatment treatment; |
fe33eb39 | 2063 | |
f4173766 | 2064 | if (reg_request->wiphy_idx != WIPHY_IDX_INVALID) |
fe33eb39 LR |
2065 | wiphy = wiphy_idx_to_wiphy(reg_request->wiphy_idx); |
2066 | ||
b3eb7f3f LR |
2067 | switch (reg_request->initiator) { |
2068 | case NL80211_REGDOM_SET_BY_CORE: | |
2069 | reg_process_hint_core(reg_request); | |
2070 | return; | |
2071 | case NL80211_REGDOM_SET_BY_USER: | |
0d97a619 | 2072 | treatment = reg_process_hint_user(reg_request); |
50c11eb9 | 2073 | if (treatment == REG_REQ_IGNORE || |
0c4ddcd2 | 2074 | treatment == REG_REQ_ALREADY_SET) |
0d97a619 | 2075 | return; |
0d97a619 | 2076 | return; |
b3eb7f3f | 2077 | case NL80211_REGDOM_SET_BY_DRIVER: |
772f0389 IP |
2078 | if (!wiphy) |
2079 | goto out_free; | |
21636c7f LR |
2080 | treatment = reg_process_hint_driver(wiphy, reg_request); |
2081 | break; | |
b3eb7f3f | 2082 | case NL80211_REGDOM_SET_BY_COUNTRY_IE: |
772f0389 IP |
2083 | if (!wiphy) |
2084 | goto out_free; | |
b23e7a9e | 2085 | treatment = reg_process_hint_country_ie(wiphy, reg_request); |
b3eb7f3f LR |
2086 | break; |
2087 | default: | |
2088 | WARN(1, "invalid initiator %d\n", reg_request->initiator); | |
772f0389 | 2089 | goto out_free; |
b3eb7f3f LR |
2090 | } |
2091 | ||
b23e7a9e LR |
2092 | /* This is required so that the orig_* parameters are saved */ |
2093 | if (treatment == REG_REQ_ALREADY_SET && wiphy && | |
ad932f04 | 2094 | wiphy->regulatory_flags & REGULATORY_STRICT_REG) { |
b23e7a9e | 2095 | wiphy_update_regulatory(wiphy, reg_request->initiator); |
ad932f04 AN |
2096 | reg_check_channels(); |
2097 | } | |
772f0389 IP |
2098 | |
2099 | return; | |
2100 | ||
2101 | out_free: | |
c888393b | 2102 | reg_free_request(reg_request); |
fe33eb39 LR |
2103 | } |
2104 | ||
ef51fb1d AN |
2105 | static bool reg_only_self_managed_wiphys(void) |
2106 | { | |
2107 | struct cfg80211_registered_device *rdev; | |
2108 | struct wiphy *wiphy; | |
2109 | bool self_managed_found = false; | |
2110 | ||
2111 | ASSERT_RTNL(); | |
2112 | ||
2113 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) { | |
2114 | wiphy = &rdev->wiphy; | |
2115 | if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) | |
2116 | self_managed_found = true; | |
2117 | else | |
2118 | return false; | |
2119 | } | |
2120 | ||
2121 | /* make sure at least one self-managed wiphy exists */ | |
2122 | return self_managed_found; | |
2123 | } | |
2124 | ||
b2e253cf LR |
2125 | /* |
2126 | * Processes regulatory hints, this is all the NL80211_REGDOM_SET_BY_* | |
2127 | * Regulatory hints come on a first come first serve basis and we | |
2128 | * must process each one atomically. | |
2129 | */ | |
fe33eb39 | 2130 | static void reg_process_pending_hints(void) |
b0e2880b | 2131 | { |
c492db37 | 2132 | struct regulatory_request *reg_request, *lr; |
fe33eb39 | 2133 | |
c492db37 | 2134 | lr = get_last_request(); |
b0e2880b | 2135 | |
b2e253cf | 2136 | /* When last_request->processed becomes true this will be rescheduled */ |
c492db37 | 2137 | if (lr && !lr->processed) { |
96cce12f | 2138 | reg_process_hint(lr); |
5fe231e8 | 2139 | return; |
b2e253cf LR |
2140 | } |
2141 | ||
fe33eb39 | 2142 | spin_lock(®_requests_lock); |
fe33eb39 | 2143 | |
b2e253cf | 2144 | if (list_empty(®_requests_list)) { |
d951c1dd | 2145 | spin_unlock(®_requests_lock); |
5fe231e8 | 2146 | return; |
fe33eb39 | 2147 | } |
b2e253cf LR |
2148 | |
2149 | reg_request = list_first_entry(®_requests_list, | |
2150 | struct regulatory_request, | |
2151 | list); | |
2152 | list_del_init(®_request->list); | |
2153 | ||
fe33eb39 | 2154 | spin_unlock(®_requests_lock); |
b0e2880b | 2155 | |
ef51fb1d AN |
2156 | if (reg_only_self_managed_wiphys()) { |
2157 | reg_free_request(reg_request); | |
2158 | return; | |
2159 | } | |
2160 | ||
1daa37c7 | 2161 | reg_process_hint(reg_request); |
fe33eb39 LR |
2162 | } |
2163 | ||
e38f8a7a LR |
2164 | /* Processes beacon hints -- this has nothing to do with country IEs */ |
2165 | static void reg_process_pending_beacon_hints(void) | |
2166 | { | |
79c97e97 | 2167 | struct cfg80211_registered_device *rdev; |
e38f8a7a LR |
2168 | struct reg_beacon *pending_beacon, *tmp; |
2169 | ||
e38f8a7a LR |
2170 | /* This goes through the _pending_ beacon list */ |
2171 | spin_lock_bh(®_pending_beacons_lock); | |
2172 | ||
e38f8a7a LR |
2173 | list_for_each_entry_safe(pending_beacon, tmp, |
2174 | ®_pending_beacons, list) { | |
e38f8a7a LR |
2175 | list_del_init(&pending_beacon->list); |
2176 | ||
2177 | /* Applies the beacon hint to current wiphys */ | |
79c97e97 JB |
2178 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) |
2179 | wiphy_update_new_beacon(&rdev->wiphy, pending_beacon); | |
e38f8a7a LR |
2180 | |
2181 | /* Remembers the beacon hint for new wiphys or reg changes */ | |
2182 | list_add_tail(&pending_beacon->list, ®_beacon_list); | |
2183 | } | |
2184 | ||
2185 | spin_unlock_bh(®_pending_beacons_lock); | |
e38f8a7a LR |
2186 | } |
2187 | ||
b0d7aa59 JD |
2188 | static void reg_process_self_managed_hints(void) |
2189 | { | |
2190 | struct cfg80211_registered_device *rdev; | |
2191 | struct wiphy *wiphy; | |
2192 | const struct ieee80211_regdomain *tmp; | |
2193 | const struct ieee80211_regdomain *regd; | |
2194 | enum ieee80211_band band; | |
2195 | struct regulatory_request request = {}; | |
2196 | ||
2197 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) { | |
2198 | wiphy = &rdev->wiphy; | |
2199 | ||
2200 | spin_lock(®_requests_lock); | |
2201 | regd = rdev->requested_regd; | |
2202 | rdev->requested_regd = NULL; | |
2203 | spin_unlock(®_requests_lock); | |
2204 | ||
2205 | if (regd == NULL) | |
2206 | continue; | |
2207 | ||
2208 | tmp = get_wiphy_regdom(wiphy); | |
2209 | rcu_assign_pointer(wiphy->regd, regd); | |
2210 | rcu_free_regdom(tmp); | |
2211 | ||
2212 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) | |
2213 | handle_band_custom(wiphy, wiphy->bands[band], regd); | |
2214 | ||
2215 | reg_process_ht_flags(wiphy); | |
2216 | ||
2217 | request.wiphy_idx = get_wiphy_idx(wiphy); | |
2218 | request.alpha2[0] = regd->alpha2[0]; | |
2219 | request.alpha2[1] = regd->alpha2[1]; | |
2220 | request.initiator = NL80211_REGDOM_SET_BY_DRIVER; | |
2221 | ||
2222 | nl80211_send_wiphy_reg_change_event(&request); | |
2223 | } | |
2224 | ||
2225 | reg_check_channels(); | |
2226 | } | |
2227 | ||
fe33eb39 LR |
2228 | static void reg_todo(struct work_struct *work) |
2229 | { | |
5fe231e8 | 2230 | rtnl_lock(); |
fe33eb39 | 2231 | reg_process_pending_hints(); |
e38f8a7a | 2232 | reg_process_pending_beacon_hints(); |
b0d7aa59 | 2233 | reg_process_self_managed_hints(); |
5fe231e8 | 2234 | rtnl_unlock(); |
fe33eb39 LR |
2235 | } |
2236 | ||
fe33eb39 LR |
2237 | static void queue_regulatory_request(struct regulatory_request *request) |
2238 | { | |
d4f2c881 JB |
2239 | request->alpha2[0] = toupper(request->alpha2[0]); |
2240 | request->alpha2[1] = toupper(request->alpha2[1]); | |
c61029c7 | 2241 | |
fe33eb39 LR |
2242 | spin_lock(®_requests_lock); |
2243 | list_add_tail(&request->list, ®_requests_list); | |
2244 | spin_unlock(®_requests_lock); | |
2245 | ||
2246 | schedule_work(®_work); | |
2247 | } | |
2248 | ||
09d989d1 LR |
2249 | /* |
2250 | * Core regulatory hint -- happens during cfg80211_init() | |
2251 | * and when we restore regulatory settings. | |
2252 | */ | |
ba25c141 LR |
2253 | static int regulatory_hint_core(const char *alpha2) |
2254 | { | |
2255 | struct regulatory_request *request; | |
2256 | ||
1a919318 | 2257 | request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); |
ba25c141 LR |
2258 | if (!request) |
2259 | return -ENOMEM; | |
2260 | ||
2261 | request->alpha2[0] = alpha2[0]; | |
2262 | request->alpha2[1] = alpha2[1]; | |
7db90f4a | 2263 | request->initiator = NL80211_REGDOM_SET_BY_CORE; |
ba25c141 | 2264 | |
31e99729 | 2265 | queue_regulatory_request(request); |
5078b2e3 | 2266 | |
fe33eb39 | 2267 | return 0; |
ba25c141 LR |
2268 | } |
2269 | ||
fe33eb39 | 2270 | /* User hints */ |
57b5ce07 LR |
2271 | int regulatory_hint_user(const char *alpha2, |
2272 | enum nl80211_user_reg_hint_type user_reg_hint_type) | |
b2e1b302 | 2273 | { |
fe33eb39 LR |
2274 | struct regulatory_request *request; |
2275 | ||
fdc9d7b2 JB |
2276 | if (WARN_ON(!alpha2)) |
2277 | return -EINVAL; | |
b2e1b302 | 2278 | |
fe33eb39 LR |
2279 | request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); |
2280 | if (!request) | |
2281 | return -ENOMEM; | |
2282 | ||
f4173766 | 2283 | request->wiphy_idx = WIPHY_IDX_INVALID; |
fe33eb39 LR |
2284 | request->alpha2[0] = alpha2[0]; |
2285 | request->alpha2[1] = alpha2[1]; | |
e12822e1 | 2286 | request->initiator = NL80211_REGDOM_SET_BY_USER; |
57b5ce07 | 2287 | request->user_reg_hint_type = user_reg_hint_type; |
fe33eb39 LR |
2288 | |
2289 | queue_regulatory_request(request); | |
2290 | ||
2291 | return 0; | |
2292 | } | |
2293 | ||
05050753 | 2294 | int regulatory_hint_indoor(bool is_indoor, u32 portid) |
52616f2b | 2295 | { |
05050753 I |
2296 | spin_lock(®_indoor_lock); |
2297 | ||
2298 | /* It is possible that more than one user space process is trying to | |
2299 | * configure the indoor setting. To handle such cases, clear the indoor | |
2300 | * setting in case that some process does not think that the device | |
2301 | * is operating in an indoor environment. In addition, if a user space | |
2302 | * process indicates that it is controlling the indoor setting, save its | |
2303 | * portid, i.e., make it the owner. | |
2304 | */ | |
2305 | reg_is_indoor = is_indoor; | |
2306 | if (reg_is_indoor) { | |
2307 | if (!reg_is_indoor_portid) | |
2308 | reg_is_indoor_portid = portid; | |
2309 | } else { | |
2310 | reg_is_indoor_portid = 0; | |
2311 | } | |
52616f2b | 2312 | |
05050753 | 2313 | spin_unlock(®_indoor_lock); |
52616f2b | 2314 | |
05050753 I |
2315 | if (!is_indoor) |
2316 | reg_check_channels(); | |
52616f2b IP |
2317 | |
2318 | return 0; | |
2319 | } | |
2320 | ||
05050753 I |
2321 | void regulatory_netlink_notify(u32 portid) |
2322 | { | |
2323 | spin_lock(®_indoor_lock); | |
2324 | ||
2325 | if (reg_is_indoor_portid != portid) { | |
2326 | spin_unlock(®_indoor_lock); | |
2327 | return; | |
2328 | } | |
2329 | ||
2330 | reg_is_indoor = false; | |
2331 | reg_is_indoor_portid = 0; | |
2332 | ||
2333 | spin_unlock(®_indoor_lock); | |
2334 | ||
2335 | reg_check_channels(); | |
2336 | } | |
2337 | ||
fe33eb39 LR |
2338 | /* Driver hints */ |
2339 | int regulatory_hint(struct wiphy *wiphy, const char *alpha2) | |
2340 | { | |
2341 | struct regulatory_request *request; | |
2342 | ||
fdc9d7b2 JB |
2343 | if (WARN_ON(!alpha2 || !wiphy)) |
2344 | return -EINVAL; | |
fe33eb39 | 2345 | |
4f7b9140 LR |
2346 | wiphy->regulatory_flags &= ~REGULATORY_CUSTOM_REG; |
2347 | ||
fe33eb39 LR |
2348 | request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); |
2349 | if (!request) | |
2350 | return -ENOMEM; | |
2351 | ||
2352 | request->wiphy_idx = get_wiphy_idx(wiphy); | |
2353 | ||
fe33eb39 LR |
2354 | request->alpha2[0] = alpha2[0]; |
2355 | request->alpha2[1] = alpha2[1]; | |
7db90f4a | 2356 | request->initiator = NL80211_REGDOM_SET_BY_DRIVER; |
fe33eb39 LR |
2357 | |
2358 | queue_regulatory_request(request); | |
2359 | ||
2360 | return 0; | |
b2e1b302 LR |
2361 | } |
2362 | EXPORT_SYMBOL(regulatory_hint); | |
2363 | ||
789fd033 LR |
2364 | void regulatory_hint_country_ie(struct wiphy *wiphy, enum ieee80211_band band, |
2365 | const u8 *country_ie, u8 country_ie_len) | |
3f2355cb | 2366 | { |
3f2355cb | 2367 | char alpha2[2]; |
3f2355cb | 2368 | enum environment_cap env = ENVIRON_ANY; |
db2424c5 | 2369 | struct regulatory_request *request = NULL, *lr; |
d335fe63 | 2370 | |
3f2355cb LR |
2371 | /* IE len must be evenly divisible by 2 */ |
2372 | if (country_ie_len & 0x01) | |
db2424c5 | 2373 | return; |
3f2355cb LR |
2374 | |
2375 | if (country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN) | |
db2424c5 JB |
2376 | return; |
2377 | ||
2378 | request = kzalloc(sizeof(*request), GFP_KERNEL); | |
2379 | if (!request) | |
2380 | return; | |
3f2355cb | 2381 | |
3f2355cb LR |
2382 | alpha2[0] = country_ie[0]; |
2383 | alpha2[1] = country_ie[1]; | |
2384 | ||
2385 | if (country_ie[2] == 'I') | |
2386 | env = ENVIRON_INDOOR; | |
2387 | else if (country_ie[2] == 'O') | |
2388 | env = ENVIRON_OUTDOOR; | |
2389 | ||
db2424c5 JB |
2390 | rcu_read_lock(); |
2391 | lr = get_last_request(); | |
2392 | ||
2393 | if (unlikely(!lr)) | |
2394 | goto out; | |
2395 | ||
fb1fc7ad | 2396 | /* |
8b19e6ca | 2397 | * We will run this only upon a successful connection on cfg80211. |
4b44c8bc | 2398 | * We leave conflict resolution to the workqueue, where can hold |
5fe231e8 | 2399 | * the RTNL. |
fb1fc7ad | 2400 | */ |
c492db37 JB |
2401 | if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE && |
2402 | lr->wiphy_idx != WIPHY_IDX_INVALID) | |
4b44c8bc | 2403 | goto out; |
3f2355cb | 2404 | |
fe33eb39 | 2405 | request->wiphy_idx = get_wiphy_idx(wiphy); |
4f366c5d JL |
2406 | request->alpha2[0] = alpha2[0]; |
2407 | request->alpha2[1] = alpha2[1]; | |
7db90f4a | 2408 | request->initiator = NL80211_REGDOM_SET_BY_COUNTRY_IE; |
fe33eb39 LR |
2409 | request->country_ie_env = env; |
2410 | ||
fe33eb39 | 2411 | queue_regulatory_request(request); |
db2424c5 | 2412 | request = NULL; |
3f2355cb | 2413 | out: |
db2424c5 JB |
2414 | kfree(request); |
2415 | rcu_read_unlock(); | |
3f2355cb | 2416 | } |
b2e1b302 | 2417 | |
09d989d1 LR |
2418 | static void restore_alpha2(char *alpha2, bool reset_user) |
2419 | { | |
2420 | /* indicates there is no alpha2 to consider for restoration */ | |
2421 | alpha2[0] = '9'; | |
2422 | alpha2[1] = '7'; | |
2423 | ||
2424 | /* The user setting has precedence over the module parameter */ | |
2425 | if (is_user_regdom_saved()) { | |
2426 | /* Unless we're asked to ignore it and reset it */ | |
2427 | if (reset_user) { | |
1a919318 | 2428 | REG_DBG_PRINT("Restoring regulatory settings including user preference\n"); |
09d989d1 LR |
2429 | user_alpha2[0] = '9'; |
2430 | user_alpha2[1] = '7'; | |
2431 | ||
2432 | /* | |
2433 | * If we're ignoring user settings, we still need to | |
2434 | * check the module parameter to ensure we put things | |
2435 | * back as they were for a full restore. | |
2436 | */ | |
2437 | if (!is_world_regdom(ieee80211_regdom)) { | |
1a919318 JB |
2438 | REG_DBG_PRINT("Keeping preference on module parameter ieee80211_regdom: %c%c\n", |
2439 | ieee80211_regdom[0], ieee80211_regdom[1]); | |
09d989d1 LR |
2440 | alpha2[0] = ieee80211_regdom[0]; |
2441 | alpha2[1] = ieee80211_regdom[1]; | |
2442 | } | |
2443 | } else { | |
1a919318 JB |
2444 | REG_DBG_PRINT("Restoring regulatory settings while preserving user preference for: %c%c\n", |
2445 | user_alpha2[0], user_alpha2[1]); | |
09d989d1 LR |
2446 | alpha2[0] = user_alpha2[0]; |
2447 | alpha2[1] = user_alpha2[1]; | |
2448 | } | |
2449 | } else if (!is_world_regdom(ieee80211_regdom)) { | |
1a919318 JB |
2450 | REG_DBG_PRINT("Keeping preference on module parameter ieee80211_regdom: %c%c\n", |
2451 | ieee80211_regdom[0], ieee80211_regdom[1]); | |
09d989d1 LR |
2452 | alpha2[0] = ieee80211_regdom[0]; |
2453 | alpha2[1] = ieee80211_regdom[1]; | |
2454 | } else | |
d91e41b6 | 2455 | REG_DBG_PRINT("Restoring regulatory settings\n"); |
09d989d1 LR |
2456 | } |
2457 | ||
5ce543d1 RM |
2458 | static void restore_custom_reg_settings(struct wiphy *wiphy) |
2459 | { | |
2460 | struct ieee80211_supported_band *sband; | |
2461 | enum ieee80211_band band; | |
2462 | struct ieee80211_channel *chan; | |
2463 | int i; | |
2464 | ||
2465 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) { | |
2466 | sband = wiphy->bands[band]; | |
2467 | if (!sband) | |
2468 | continue; | |
2469 | for (i = 0; i < sband->n_channels; i++) { | |
2470 | chan = &sband->channels[i]; | |
2471 | chan->flags = chan->orig_flags; | |
2472 | chan->max_antenna_gain = chan->orig_mag; | |
2473 | chan->max_power = chan->orig_mpwr; | |
899852af | 2474 | chan->beacon_found = false; |
5ce543d1 RM |
2475 | } |
2476 | } | |
2477 | } | |
2478 | ||
09d989d1 LR |
2479 | /* |
2480 | * Restoring regulatory settings involves ingoring any | |
2481 | * possibly stale country IE information and user regulatory | |
2482 | * settings if so desired, this includes any beacon hints | |
2483 | * learned as we could have traveled outside to another country | |
2484 | * after disconnection. To restore regulatory settings we do | |
2485 | * exactly what we did at bootup: | |
2486 | * | |
2487 | * - send a core regulatory hint | |
2488 | * - send a user regulatory hint if applicable | |
2489 | * | |
2490 | * Device drivers that send a regulatory hint for a specific country | |
2491 | * keep their own regulatory domain on wiphy->regd so that does does | |
2492 | * not need to be remembered. | |
2493 | */ | |
2494 | static void restore_regulatory_settings(bool reset_user) | |
2495 | { | |
2496 | char alpha2[2]; | |
cee0bec5 | 2497 | char world_alpha2[2]; |
09d989d1 | 2498 | struct reg_beacon *reg_beacon, *btmp; |
14609555 | 2499 | LIST_HEAD(tmp_reg_req_list); |
5ce543d1 | 2500 | struct cfg80211_registered_device *rdev; |
09d989d1 | 2501 | |
5fe231e8 JB |
2502 | ASSERT_RTNL(); |
2503 | ||
05050753 I |
2504 | /* |
2505 | * Clear the indoor setting in case that it is not controlled by user | |
2506 | * space, as otherwise there is no guarantee that the device is still | |
2507 | * operating in an indoor environment. | |
2508 | */ | |
2509 | spin_lock(®_indoor_lock); | |
2510 | if (reg_is_indoor && !reg_is_indoor_portid) { | |
2511 | reg_is_indoor = false; | |
2512 | reg_check_channels(); | |
2513 | } | |
2514 | spin_unlock(®_indoor_lock); | |
52616f2b | 2515 | |
2d319867 | 2516 | reset_regdomains(true, &world_regdom); |
09d989d1 LR |
2517 | restore_alpha2(alpha2, reset_user); |
2518 | ||
14609555 LR |
2519 | /* |
2520 | * If there's any pending requests we simply | |
2521 | * stash them to a temporary pending queue and | |
2522 | * add then after we've restored regulatory | |
2523 | * settings. | |
2524 | */ | |
2525 | spin_lock(®_requests_lock); | |
eeca9fce | 2526 | list_splice_tail_init(®_requests_list, &tmp_reg_req_list); |
14609555 LR |
2527 | spin_unlock(®_requests_lock); |
2528 | ||
09d989d1 LR |
2529 | /* Clear beacon hints */ |
2530 | spin_lock_bh(®_pending_beacons_lock); | |
fea9bced JB |
2531 | list_for_each_entry_safe(reg_beacon, btmp, ®_pending_beacons, list) { |
2532 | list_del(®_beacon->list); | |
2533 | kfree(reg_beacon); | |
09d989d1 LR |
2534 | } |
2535 | spin_unlock_bh(®_pending_beacons_lock); | |
2536 | ||
fea9bced JB |
2537 | list_for_each_entry_safe(reg_beacon, btmp, ®_beacon_list, list) { |
2538 | list_del(®_beacon->list); | |
2539 | kfree(reg_beacon); | |
09d989d1 LR |
2540 | } |
2541 | ||
2542 | /* First restore to the basic regulatory settings */ | |
379b82f4 JB |
2543 | world_alpha2[0] = cfg80211_world_regdom->alpha2[0]; |
2544 | world_alpha2[1] = cfg80211_world_regdom->alpha2[1]; | |
09d989d1 | 2545 | |
5ce543d1 | 2546 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) { |
b0d7aa59 JD |
2547 | if (rdev->wiphy.regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) |
2548 | continue; | |
a2f73b6c | 2549 | if (rdev->wiphy.regulatory_flags & REGULATORY_CUSTOM_REG) |
5ce543d1 RM |
2550 | restore_custom_reg_settings(&rdev->wiphy); |
2551 | } | |
2552 | ||
cee0bec5 | 2553 | regulatory_hint_core(world_alpha2); |
09d989d1 LR |
2554 | |
2555 | /* | |
2556 | * This restores the ieee80211_regdom module parameter | |
2557 | * preference or the last user requested regulatory | |
2558 | * settings, user regulatory settings takes precedence. | |
2559 | */ | |
2560 | if (is_an_alpha2(alpha2)) | |
57b5ce07 | 2561 | regulatory_hint_user(user_alpha2, NL80211_USER_REG_HINT_USER); |
09d989d1 | 2562 | |
14609555 | 2563 | spin_lock(®_requests_lock); |
11cff96c | 2564 | list_splice_tail_init(&tmp_reg_req_list, ®_requests_list); |
14609555 LR |
2565 | spin_unlock(®_requests_lock); |
2566 | ||
14609555 LR |
2567 | REG_DBG_PRINT("Kicking the queue\n"); |
2568 | ||
2569 | schedule_work(®_work); | |
2570 | } | |
09d989d1 LR |
2571 | |
2572 | void regulatory_hint_disconnect(void) | |
2573 | { | |
1a919318 | 2574 | REG_DBG_PRINT("All devices are disconnected, going to restore regulatory settings\n"); |
09d989d1 LR |
2575 | restore_regulatory_settings(false); |
2576 | } | |
2577 | ||
e38f8a7a LR |
2578 | static bool freq_is_chan_12_13_14(u16 freq) |
2579 | { | |
59eb21a6 BR |
2580 | if (freq == ieee80211_channel_to_frequency(12, IEEE80211_BAND_2GHZ) || |
2581 | freq == ieee80211_channel_to_frequency(13, IEEE80211_BAND_2GHZ) || | |
2582 | freq == ieee80211_channel_to_frequency(14, IEEE80211_BAND_2GHZ)) | |
e38f8a7a LR |
2583 | return true; |
2584 | return false; | |
2585 | } | |
2586 | ||
3ebfa6e7 LR |
2587 | static bool pending_reg_beacon(struct ieee80211_channel *beacon_chan) |
2588 | { | |
2589 | struct reg_beacon *pending_beacon; | |
2590 | ||
2591 | list_for_each_entry(pending_beacon, ®_pending_beacons, list) | |
2592 | if (beacon_chan->center_freq == | |
2593 | pending_beacon->chan.center_freq) | |
2594 | return true; | |
2595 | return false; | |
2596 | } | |
2597 | ||
e38f8a7a LR |
2598 | int regulatory_hint_found_beacon(struct wiphy *wiphy, |
2599 | struct ieee80211_channel *beacon_chan, | |
2600 | gfp_t gfp) | |
2601 | { | |
2602 | struct reg_beacon *reg_beacon; | |
3ebfa6e7 | 2603 | bool processing; |
e38f8a7a | 2604 | |
1a919318 JB |
2605 | if (beacon_chan->beacon_found || |
2606 | beacon_chan->flags & IEEE80211_CHAN_RADAR || | |
e38f8a7a | 2607 | (beacon_chan->band == IEEE80211_BAND_2GHZ && |
1a919318 | 2608 | !freq_is_chan_12_13_14(beacon_chan->center_freq))) |
e38f8a7a LR |
2609 | return 0; |
2610 | ||
3ebfa6e7 LR |
2611 | spin_lock_bh(®_pending_beacons_lock); |
2612 | processing = pending_reg_beacon(beacon_chan); | |
2613 | spin_unlock_bh(®_pending_beacons_lock); | |
2614 | ||
2615 | if (processing) | |
e38f8a7a LR |
2616 | return 0; |
2617 | ||
2618 | reg_beacon = kzalloc(sizeof(struct reg_beacon), gfp); | |
2619 | if (!reg_beacon) | |
2620 | return -ENOMEM; | |
2621 | ||
1a919318 | 2622 | REG_DBG_PRINT("Found new beacon on frequency: %d MHz (Ch %d) on %s\n", |
4113f751 LR |
2623 | beacon_chan->center_freq, |
2624 | ieee80211_frequency_to_channel(beacon_chan->center_freq), | |
2625 | wiphy_name(wiphy)); | |
2626 | ||
e38f8a7a | 2627 | memcpy(®_beacon->chan, beacon_chan, |
1a919318 | 2628 | sizeof(struct ieee80211_channel)); |
e38f8a7a LR |
2629 | |
2630 | /* | |
2631 | * Since we can be called from BH or and non-BH context | |
2632 | * we must use spin_lock_bh() | |
2633 | */ | |
2634 | spin_lock_bh(®_pending_beacons_lock); | |
2635 | list_add_tail(®_beacon->list, ®_pending_beacons); | |
2636 | spin_unlock_bh(®_pending_beacons_lock); | |
2637 | ||
2638 | schedule_work(®_work); | |
2639 | ||
2640 | return 0; | |
2641 | } | |
2642 | ||
a3d2eaf0 | 2643 | static void print_rd_rules(const struct ieee80211_regdomain *rd) |
b2e1b302 LR |
2644 | { |
2645 | unsigned int i; | |
a3d2eaf0 JB |
2646 | const struct ieee80211_reg_rule *reg_rule = NULL; |
2647 | const struct ieee80211_freq_range *freq_range = NULL; | |
2648 | const struct ieee80211_power_rule *power_rule = NULL; | |
089027e5 | 2649 | char bw[32], cac_time[32]; |
b2e1b302 | 2650 | |
089027e5 | 2651 | pr_info(" (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp), (dfs_cac_time)\n"); |
b2e1b302 LR |
2652 | |
2653 | for (i = 0; i < rd->n_reg_rules; i++) { | |
2654 | reg_rule = &rd->reg_rules[i]; | |
2655 | freq_range = ®_rule->freq_range; | |
2656 | power_rule = ®_rule->power_rule; | |
2657 | ||
b0dfd2ea JD |
2658 | if (reg_rule->flags & NL80211_RRF_AUTO_BW) |
2659 | snprintf(bw, sizeof(bw), "%d KHz, %d KHz AUTO", | |
2660 | freq_range->max_bandwidth_khz, | |
97524820 JD |
2661 | reg_get_max_bandwidth(rd, reg_rule)); |
2662 | else | |
b0dfd2ea | 2663 | snprintf(bw, sizeof(bw), "%d KHz", |
97524820 JD |
2664 | freq_range->max_bandwidth_khz); |
2665 | ||
089027e5 JD |
2666 | if (reg_rule->flags & NL80211_RRF_DFS) |
2667 | scnprintf(cac_time, sizeof(cac_time), "%u s", | |
2668 | reg_rule->dfs_cac_ms/1000); | |
2669 | else | |
2670 | scnprintf(cac_time, sizeof(cac_time), "N/A"); | |
2671 | ||
2672 | ||
fb1fc7ad LR |
2673 | /* |
2674 | * There may not be documentation for max antenna gain | |
2675 | * in certain regions | |
2676 | */ | |
b2e1b302 | 2677 | if (power_rule->max_antenna_gain) |
089027e5 | 2678 | pr_info(" (%d KHz - %d KHz @ %s), (%d mBi, %d mBm), (%s)\n", |
b2e1b302 LR |
2679 | freq_range->start_freq_khz, |
2680 | freq_range->end_freq_khz, | |
97524820 | 2681 | bw, |
b2e1b302 | 2682 | power_rule->max_antenna_gain, |
089027e5 JD |
2683 | power_rule->max_eirp, |
2684 | cac_time); | |
b2e1b302 | 2685 | else |
089027e5 | 2686 | pr_info(" (%d KHz - %d KHz @ %s), (N/A, %d mBm), (%s)\n", |
b2e1b302 LR |
2687 | freq_range->start_freq_khz, |
2688 | freq_range->end_freq_khz, | |
97524820 | 2689 | bw, |
089027e5 JD |
2690 | power_rule->max_eirp, |
2691 | cac_time); | |
b2e1b302 LR |
2692 | } |
2693 | } | |
2694 | ||
4c7d3982 | 2695 | bool reg_supported_dfs_region(enum nl80211_dfs_regions dfs_region) |
8b60b078 LR |
2696 | { |
2697 | switch (dfs_region) { | |
2698 | case NL80211_DFS_UNSET: | |
2699 | case NL80211_DFS_FCC: | |
2700 | case NL80211_DFS_ETSI: | |
2701 | case NL80211_DFS_JP: | |
2702 | return true; | |
2703 | default: | |
2704 | REG_DBG_PRINT("Ignoring uknown DFS master region: %d\n", | |
2705 | dfs_region); | |
2706 | return false; | |
2707 | } | |
2708 | } | |
2709 | ||
a3d2eaf0 | 2710 | static void print_regdomain(const struct ieee80211_regdomain *rd) |
b2e1b302 | 2711 | { |
c492db37 | 2712 | struct regulatory_request *lr = get_last_request(); |
b2e1b302 | 2713 | |
3f2355cb | 2714 | if (is_intersected_alpha2(rd->alpha2)) { |
c492db37 | 2715 | if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) { |
79c97e97 | 2716 | struct cfg80211_registered_device *rdev; |
c492db37 | 2717 | rdev = cfg80211_rdev_by_wiphy_idx(lr->wiphy_idx); |
79c97e97 | 2718 | if (rdev) { |
e9c0268f | 2719 | pr_info("Current regulatory domain updated by AP to: %c%c\n", |
79c97e97 JB |
2720 | rdev->country_ie_alpha2[0], |
2721 | rdev->country_ie_alpha2[1]); | |
3f2355cb | 2722 | } else |
e9c0268f | 2723 | pr_info("Current regulatory domain intersected:\n"); |
3f2355cb | 2724 | } else |
e9c0268f | 2725 | pr_info("Current regulatory domain intersected:\n"); |
1a919318 | 2726 | } else if (is_world_regdom(rd->alpha2)) { |
e9c0268f | 2727 | pr_info("World regulatory domain updated:\n"); |
1a919318 | 2728 | } else { |
b2e1b302 | 2729 | if (is_unknown_alpha2(rd->alpha2)) |
e9c0268f | 2730 | pr_info("Regulatory domain changed to driver built-in settings (unknown country)\n"); |
57b5ce07 | 2731 | else { |
c492db37 | 2732 | if (reg_request_cell_base(lr)) |
1a919318 | 2733 | pr_info("Regulatory domain changed to country: %c%c by Cell Station\n", |
57b5ce07 LR |
2734 | rd->alpha2[0], rd->alpha2[1]); |
2735 | else | |
1a919318 | 2736 | pr_info("Regulatory domain changed to country: %c%c\n", |
57b5ce07 LR |
2737 | rd->alpha2[0], rd->alpha2[1]); |
2738 | } | |
b2e1b302 | 2739 | } |
1a919318 | 2740 | |
3ef121b5 | 2741 | pr_info(" DFS Master region: %s", reg_dfs_region_str(rd->dfs_region)); |
b2e1b302 LR |
2742 | print_rd_rules(rd); |
2743 | } | |
2744 | ||
2df78167 | 2745 | static void print_regdomain_info(const struct ieee80211_regdomain *rd) |
b2e1b302 | 2746 | { |
e9c0268f | 2747 | pr_info("Regulatory domain: %c%c\n", rd->alpha2[0], rd->alpha2[1]); |
b2e1b302 LR |
2748 | print_rd_rules(rd); |
2749 | } | |
2750 | ||
3b9e5aca LR |
2751 | static int reg_set_rd_core(const struct ieee80211_regdomain *rd) |
2752 | { | |
2753 | if (!is_world_regdom(rd->alpha2)) | |
2754 | return -EINVAL; | |
2755 | update_world_regdomain(rd); | |
2756 | return 0; | |
2757 | } | |
2758 | ||
84721d44 LR |
2759 | static int reg_set_rd_user(const struct ieee80211_regdomain *rd, |
2760 | struct regulatory_request *user_request) | |
2761 | { | |
2762 | const struct ieee80211_regdomain *intersected_rd = NULL; | |
2763 | ||
84721d44 LR |
2764 | if (!regdom_changes(rd->alpha2)) |
2765 | return -EALREADY; | |
2766 | ||
2767 | if (!is_valid_rd(rd)) { | |
2768 | pr_err("Invalid regulatory domain detected:\n"); | |
2769 | print_regdomain_info(rd); | |
2770 | return -EINVAL; | |
2771 | } | |
2772 | ||
2773 | if (!user_request->intersect) { | |
2774 | reset_regdomains(false, rd); | |
2775 | return 0; | |
2776 | } | |
2777 | ||
2778 | intersected_rd = regdom_intersect(rd, get_cfg80211_regdom()); | |
2779 | if (!intersected_rd) | |
2780 | return -EINVAL; | |
2781 | ||
2782 | kfree(rd); | |
2783 | rd = NULL; | |
2784 | reset_regdomains(false, intersected_rd); | |
2785 | ||
2786 | return 0; | |
2787 | } | |
2788 | ||
f5fe3247 LR |
2789 | static int reg_set_rd_driver(const struct ieee80211_regdomain *rd, |
2790 | struct regulatory_request *driver_request) | |
b2e1b302 | 2791 | { |
e9763c3c | 2792 | const struct ieee80211_regdomain *regd; |
9c96477d | 2793 | const struct ieee80211_regdomain *intersected_rd = NULL; |
f5fe3247 | 2794 | const struct ieee80211_regdomain *tmp; |
806a9e39 | 2795 | struct wiphy *request_wiphy; |
6913b49a | 2796 | |
f5fe3247 | 2797 | if (is_world_regdom(rd->alpha2)) |
b2e1b302 LR |
2798 | return -EINVAL; |
2799 | ||
f5fe3247 LR |
2800 | if (!regdom_changes(rd->alpha2)) |
2801 | return -EALREADY; | |
b2e1b302 | 2802 | |
8375af3b | 2803 | if (!is_valid_rd(rd)) { |
e9c0268f | 2804 | pr_err("Invalid regulatory domain detected:\n"); |
8375af3b LR |
2805 | print_regdomain_info(rd); |
2806 | return -EINVAL; | |
b2e1b302 LR |
2807 | } |
2808 | ||
f5fe3247 LR |
2809 | request_wiphy = wiphy_idx_to_wiphy(driver_request->wiphy_idx); |
2810 | if (!request_wiphy) { | |
845f3351 SD |
2811 | queue_delayed_work(system_power_efficient_wq, |
2812 | ®_timeout, 0); | |
de3584bd JB |
2813 | return -ENODEV; |
2814 | } | |
806a9e39 | 2815 | |
f5fe3247 | 2816 | if (!driver_request->intersect) { |
558f6d32 LR |
2817 | if (request_wiphy->regd) |
2818 | return -EALREADY; | |
3e0c3ff3 | 2819 | |
e9763c3c JB |
2820 | regd = reg_copy_regd(rd); |
2821 | if (IS_ERR(regd)) | |
2822 | return PTR_ERR(regd); | |
3e0c3ff3 | 2823 | |
458f4f9e | 2824 | rcu_assign_pointer(request_wiphy->regd, regd); |
379b82f4 | 2825 | reset_regdomains(false, rd); |
b8295acd LR |
2826 | return 0; |
2827 | } | |
2828 | ||
f5fe3247 LR |
2829 | intersected_rd = regdom_intersect(rd, get_cfg80211_regdom()); |
2830 | if (!intersected_rd) | |
2831 | return -EINVAL; | |
b8295acd | 2832 | |
f5fe3247 LR |
2833 | /* |
2834 | * We can trash what CRDA provided now. | |
2835 | * However if a driver requested this specific regulatory | |
2836 | * domain we keep it for its private use | |
2837 | */ | |
2838 | tmp = get_wiphy_regdom(request_wiphy); | |
2839 | rcu_assign_pointer(request_wiphy->regd, rd); | |
2840 | rcu_free_regdom(tmp); | |
b8295acd | 2841 | |
f5fe3247 | 2842 | rd = NULL; |
b7566fc3 | 2843 | |
f5fe3247 | 2844 | reset_regdomains(false, intersected_rd); |
3e0c3ff3 | 2845 | |
f5fe3247 LR |
2846 | return 0; |
2847 | } | |
2848 | ||
01992406 LR |
2849 | static int reg_set_rd_country_ie(const struct ieee80211_regdomain *rd, |
2850 | struct regulatory_request *country_ie_request) | |
f5fe3247 LR |
2851 | { |
2852 | struct wiphy *request_wiphy; | |
b8295acd | 2853 | |
f5fe3247 LR |
2854 | if (!is_alpha2_set(rd->alpha2) && !is_an_alpha2(rd->alpha2) && |
2855 | !is_unknown_alpha2(rd->alpha2)) | |
2856 | return -EINVAL; | |
b8295acd | 2857 | |
f5fe3247 LR |
2858 | /* |
2859 | * Lets only bother proceeding on the same alpha2 if the current | |
2860 | * rd is non static (it means CRDA was present and was used last) | |
2861 | * and the pending request came in from a country IE | |
2862 | */ | |
2863 | ||
2864 | if (!is_valid_rd(rd)) { | |
2865 | pr_err("Invalid regulatory domain detected:\n"); | |
2866 | print_regdomain_info(rd); | |
2867 | return -EINVAL; | |
9c96477d LR |
2868 | } |
2869 | ||
01992406 | 2870 | request_wiphy = wiphy_idx_to_wiphy(country_ie_request->wiphy_idx); |
f5fe3247 | 2871 | if (!request_wiphy) { |
845f3351 SD |
2872 | queue_delayed_work(system_power_efficient_wq, |
2873 | ®_timeout, 0); | |
f5fe3247 LR |
2874 | return -ENODEV; |
2875 | } | |
b2e1b302 | 2876 | |
01992406 | 2877 | if (country_ie_request->intersect) |
f5fe3247 LR |
2878 | return -EINVAL; |
2879 | ||
2880 | reset_regdomains(false, rd); | |
2881 | return 0; | |
2882 | } | |
b2e1b302 | 2883 | |
fb1fc7ad LR |
2884 | /* |
2885 | * Use this call to set the current regulatory domain. Conflicts with | |
b2e1b302 | 2886 | * multiple drivers can be ironed out later. Caller must've already |
458f4f9e | 2887 | * kmalloc'd the rd structure. |
fb1fc7ad | 2888 | */ |
a3d2eaf0 | 2889 | int set_regdom(const struct ieee80211_regdomain *rd) |
b2e1b302 | 2890 | { |
c492db37 | 2891 | struct regulatory_request *lr; |
092008ab | 2892 | bool user_reset = false; |
b2e1b302 LR |
2893 | int r; |
2894 | ||
3b9e5aca LR |
2895 | if (!reg_is_valid_request(rd->alpha2)) { |
2896 | kfree(rd); | |
2897 | return -EINVAL; | |
2898 | } | |
2899 | ||
c492db37 | 2900 | lr = get_last_request(); |
abc7381b | 2901 | |
b2e1b302 | 2902 | /* Note that this doesn't update the wiphys, this is done below */ |
3b9e5aca LR |
2903 | switch (lr->initiator) { |
2904 | case NL80211_REGDOM_SET_BY_CORE: | |
2905 | r = reg_set_rd_core(rd); | |
2906 | break; | |
2907 | case NL80211_REGDOM_SET_BY_USER: | |
84721d44 | 2908 | r = reg_set_rd_user(rd, lr); |
092008ab | 2909 | user_reset = true; |
84721d44 | 2910 | break; |
3b9e5aca | 2911 | case NL80211_REGDOM_SET_BY_DRIVER: |
f5fe3247 LR |
2912 | r = reg_set_rd_driver(rd, lr); |
2913 | break; | |
3b9e5aca | 2914 | case NL80211_REGDOM_SET_BY_COUNTRY_IE: |
01992406 | 2915 | r = reg_set_rd_country_ie(rd, lr); |
3b9e5aca LR |
2916 | break; |
2917 | default: | |
2918 | WARN(1, "invalid initiator %d\n", lr->initiator); | |
2919 | return -EINVAL; | |
2920 | } | |
2921 | ||
d2372b31 | 2922 | if (r) { |
092008ab JD |
2923 | switch (r) { |
2924 | case -EALREADY: | |
95908535 | 2925 | reg_set_request_processed(); |
092008ab JD |
2926 | break; |
2927 | default: | |
2928 | /* Back to world regulatory in case of errors */ | |
2929 | restore_regulatory_settings(user_reset); | |
2930 | } | |
95908535 | 2931 | |
d2372b31 | 2932 | kfree(rd); |
38fd2143 | 2933 | return r; |
d2372b31 | 2934 | } |
b2e1b302 | 2935 | |
b2e1b302 | 2936 | /* This would make this whole thing pointless */ |
38fd2143 JB |
2937 | if (WARN_ON(!lr->intersect && rd != get_cfg80211_regdom())) |
2938 | return -EINVAL; | |
b2e1b302 LR |
2939 | |
2940 | /* update all wiphys now with the new established regulatory domain */ | |
c492db37 | 2941 | update_all_wiphy_regulatory(lr->initiator); |
b2e1b302 | 2942 | |
458f4f9e | 2943 | print_regdomain(get_cfg80211_regdom()); |
b2e1b302 | 2944 | |
c492db37 | 2945 | nl80211_send_reg_change_event(lr); |
73d54c9e | 2946 | |
b2e253cf LR |
2947 | reg_set_request_processed(); |
2948 | ||
38fd2143 | 2949 | return 0; |
b2e1b302 LR |
2950 | } |
2951 | ||
2c3e861c AN |
2952 | static int __regulatory_set_wiphy_regd(struct wiphy *wiphy, |
2953 | struct ieee80211_regdomain *rd) | |
b0d7aa59 JD |
2954 | { |
2955 | const struct ieee80211_regdomain *regd; | |
2956 | const struct ieee80211_regdomain *prev_regd; | |
2957 | struct cfg80211_registered_device *rdev; | |
2958 | ||
2959 | if (WARN_ON(!wiphy || !rd)) | |
2960 | return -EINVAL; | |
2961 | ||
2962 | if (WARN(!(wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED), | |
2963 | "wiphy should have REGULATORY_WIPHY_SELF_MANAGED\n")) | |
2964 | return -EPERM; | |
2965 | ||
2966 | if (WARN(!is_valid_rd(rd), "Invalid regulatory domain detected\n")) { | |
2967 | print_regdomain_info(rd); | |
2968 | return -EINVAL; | |
2969 | } | |
2970 | ||
2971 | regd = reg_copy_regd(rd); | |
2972 | if (IS_ERR(regd)) | |
2973 | return PTR_ERR(regd); | |
2974 | ||
2975 | rdev = wiphy_to_rdev(wiphy); | |
2976 | ||
2977 | spin_lock(®_requests_lock); | |
2978 | prev_regd = rdev->requested_regd; | |
2979 | rdev->requested_regd = regd; | |
2980 | spin_unlock(®_requests_lock); | |
2981 | ||
2982 | kfree(prev_regd); | |
2c3e861c AN |
2983 | return 0; |
2984 | } | |
2985 | ||
2986 | int regulatory_set_wiphy_regd(struct wiphy *wiphy, | |
2987 | struct ieee80211_regdomain *rd) | |
2988 | { | |
2989 | int ret = __regulatory_set_wiphy_regd(wiphy, rd); | |
2990 | ||
2991 | if (ret) | |
2992 | return ret; | |
b0d7aa59 JD |
2993 | |
2994 | schedule_work(®_work); | |
2995 | return 0; | |
2996 | } | |
2997 | EXPORT_SYMBOL(regulatory_set_wiphy_regd); | |
2998 | ||
2c3e861c AN |
2999 | int regulatory_set_wiphy_regd_sync_rtnl(struct wiphy *wiphy, |
3000 | struct ieee80211_regdomain *rd) | |
3001 | { | |
3002 | int ret; | |
3003 | ||
3004 | ASSERT_RTNL(); | |
3005 | ||
3006 | ret = __regulatory_set_wiphy_regd(wiphy, rd); | |
3007 | if (ret) | |
3008 | return ret; | |
3009 | ||
3010 | /* process the request immediately */ | |
3011 | reg_process_self_managed_hints(); | |
3012 | return 0; | |
3013 | } | |
3014 | EXPORT_SYMBOL(regulatory_set_wiphy_regd_sync_rtnl); | |
3015 | ||
57b5ce07 LR |
3016 | void wiphy_regulatory_register(struct wiphy *wiphy) |
3017 | { | |
23df0b73 AN |
3018 | struct regulatory_request *lr; |
3019 | ||
b0d7aa59 JD |
3020 | /* self-managed devices ignore external hints */ |
3021 | if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) | |
3022 | wiphy->regulatory_flags |= REGULATORY_DISABLE_BEACON_HINTS | | |
3023 | REGULATORY_COUNTRY_IE_IGNORE; | |
3024 | ||
57b5ce07 LR |
3025 | if (!reg_dev_ignore_cell_hint(wiphy)) |
3026 | reg_num_devs_support_basehint++; | |
3027 | ||
23df0b73 AN |
3028 | lr = get_last_request(); |
3029 | wiphy_update_regulatory(wiphy, lr->initiator); | |
57b5ce07 LR |
3030 | } |
3031 | ||
bfead080 | 3032 | void wiphy_regulatory_deregister(struct wiphy *wiphy) |
3f2355cb | 3033 | { |
0ad8acaf | 3034 | struct wiphy *request_wiphy = NULL; |
c492db37 | 3035 | struct regulatory_request *lr; |
761cf7ec | 3036 | |
c492db37 | 3037 | lr = get_last_request(); |
abc7381b | 3038 | |
57b5ce07 LR |
3039 | if (!reg_dev_ignore_cell_hint(wiphy)) |
3040 | reg_num_devs_support_basehint--; | |
3041 | ||
458f4f9e | 3042 | rcu_free_regdom(get_wiphy_regdom(wiphy)); |
34dd886c | 3043 | RCU_INIT_POINTER(wiphy->regd, NULL); |
0ef9ccdd | 3044 | |
c492db37 JB |
3045 | if (lr) |
3046 | request_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx); | |
806a9e39 | 3047 | |
0ef9ccdd | 3048 | if (!request_wiphy || request_wiphy != wiphy) |
38fd2143 | 3049 | return; |
0ef9ccdd | 3050 | |
c492db37 JB |
3051 | lr->wiphy_idx = WIPHY_IDX_INVALID; |
3052 | lr->country_ie_env = ENVIRON_ANY; | |
3f2355cb LR |
3053 | } |
3054 | ||
a90c7a31 LR |
3055 | static void reg_timeout_work(struct work_struct *work) |
3056 | { | |
1a919318 | 3057 | REG_DBG_PRINT("Timeout while waiting for CRDA to reply, restoring regulatory settings\n"); |
f77b86d7 | 3058 | rtnl_lock(); |
a90c7a31 | 3059 | restore_regulatory_settings(true); |
f77b86d7 | 3060 | rtnl_unlock(); |
a90c7a31 LR |
3061 | } |
3062 | ||
174e0cd2 IP |
3063 | /* |
3064 | * See http://www.fcc.gov/document/5-ghz-unlicensed-spectrum-unii, for | |
3065 | * UNII band definitions | |
3066 | */ | |
3067 | int cfg80211_get_unii(int freq) | |
3068 | { | |
3069 | /* UNII-1 */ | |
3070 | if (freq >= 5150 && freq <= 5250) | |
3071 | return 0; | |
3072 | ||
3073 | /* UNII-2A */ | |
3074 | if (freq > 5250 && freq <= 5350) | |
3075 | return 1; | |
3076 | ||
3077 | /* UNII-2B */ | |
3078 | if (freq > 5350 && freq <= 5470) | |
3079 | return 2; | |
3080 | ||
3081 | /* UNII-2C */ | |
3082 | if (freq > 5470 && freq <= 5725) | |
3083 | return 3; | |
3084 | ||
3085 | /* UNII-3 */ | |
3086 | if (freq > 5725 && freq <= 5825) | |
3087 | return 4; | |
3088 | ||
3089 | return -EINVAL; | |
3090 | } | |
3091 | ||
c8866e55 IP |
3092 | bool regulatory_indoor_allowed(void) |
3093 | { | |
3094 | return reg_is_indoor; | |
3095 | } | |
3096 | ||
2fcc9f73 | 3097 | int __init regulatory_init(void) |
b2e1b302 | 3098 | { |
bcf4f99b | 3099 | int err = 0; |
734366de | 3100 | |
b2e1b302 LR |
3101 | reg_pdev = platform_device_register_simple("regulatory", 0, NULL, 0); |
3102 | if (IS_ERR(reg_pdev)) | |
3103 | return PTR_ERR(reg_pdev); | |
734366de | 3104 | |
fe33eb39 | 3105 | spin_lock_init(®_requests_lock); |
e38f8a7a | 3106 | spin_lock_init(®_pending_beacons_lock); |
05050753 | 3107 | spin_lock_init(®_indoor_lock); |
fe33eb39 | 3108 | |
80007efe LR |
3109 | reg_regdb_size_check(); |
3110 | ||
458f4f9e | 3111 | rcu_assign_pointer(cfg80211_regdomain, cfg80211_world_regdom); |
734366de | 3112 | |
09d989d1 LR |
3113 | user_alpha2[0] = '9'; |
3114 | user_alpha2[1] = '7'; | |
3115 | ||
ae9e4b0d | 3116 | /* We always try to get an update for the static regdomain */ |
458f4f9e | 3117 | err = regulatory_hint_core(cfg80211_world_regdom->alpha2); |
ba25c141 | 3118 | if (err) { |
bcf4f99b LR |
3119 | if (err == -ENOMEM) |
3120 | return err; | |
3121 | /* | |
3122 | * N.B. kobject_uevent_env() can fail mainly for when we're out | |
3123 | * memory which is handled and propagated appropriately above | |
3124 | * but it can also fail during a netlink_broadcast() or during | |
3125 | * early boot for call_usermodehelper(). For now treat these | |
3126 | * errors as non-fatal. | |
3127 | */ | |
e9c0268f | 3128 | pr_err("kobject_uevent_env() was unable to call CRDA during init\n"); |
bcf4f99b | 3129 | } |
734366de | 3130 | |
ae9e4b0d LR |
3131 | /* |
3132 | * Finally, if the user set the module parameter treat it | |
3133 | * as a user hint. | |
3134 | */ | |
3135 | if (!is_world_regdom(ieee80211_regdom)) | |
57b5ce07 LR |
3136 | regulatory_hint_user(ieee80211_regdom, |
3137 | NL80211_USER_REG_HINT_USER); | |
ae9e4b0d | 3138 | |
b2e1b302 LR |
3139 | return 0; |
3140 | } | |
3141 | ||
1a919318 | 3142 | void regulatory_exit(void) |
b2e1b302 | 3143 | { |
fe33eb39 | 3144 | struct regulatory_request *reg_request, *tmp; |
e38f8a7a | 3145 | struct reg_beacon *reg_beacon, *btmp; |
fe33eb39 LR |
3146 | |
3147 | cancel_work_sync(®_work); | |
a90c7a31 | 3148 | cancel_delayed_work_sync(®_timeout); |
ad932f04 | 3149 | cancel_delayed_work_sync(®_check_chans); |
fe33eb39 | 3150 | |
9027b149 | 3151 | /* Lock to suppress warnings */ |
38fd2143 | 3152 | rtnl_lock(); |
379b82f4 | 3153 | reset_regdomains(true, NULL); |
38fd2143 | 3154 | rtnl_unlock(); |
734366de | 3155 | |
58ebacc6 | 3156 | dev_set_uevent_suppress(®_pdev->dev, true); |
f6037d09 | 3157 | |
b2e1b302 | 3158 | platform_device_unregister(reg_pdev); |
734366de | 3159 | |
fea9bced JB |
3160 | list_for_each_entry_safe(reg_beacon, btmp, ®_pending_beacons, list) { |
3161 | list_del(®_beacon->list); | |
3162 | kfree(reg_beacon); | |
e38f8a7a | 3163 | } |
e38f8a7a | 3164 | |
fea9bced JB |
3165 | list_for_each_entry_safe(reg_beacon, btmp, ®_beacon_list, list) { |
3166 | list_del(®_beacon->list); | |
3167 | kfree(reg_beacon); | |
e38f8a7a LR |
3168 | } |
3169 | ||
fea9bced JB |
3170 | list_for_each_entry_safe(reg_request, tmp, ®_requests_list, list) { |
3171 | list_del(®_request->list); | |
3172 | kfree(reg_request); | |
fe33eb39 | 3173 | } |
8318d78a | 3174 | } |