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Commit | Line | Data |
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8318d78a JB |
1 | /* |
2 | * Copyright 2002-2005, Instant802 Networks, Inc. | |
3 | * Copyright 2005-2006, Devicescape Software, Inc. | |
4 | * Copyright 2007 Johannes Berg <johannes@sipsolutions.net> | |
3b77d5ec | 5 | * Copyright 2008-2011 Luis R. Rodriguez <mcgrof@qca.qualcomm.com> |
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 | |
ad932f04 AN |
63 | /* |
64 | * Grace period we give before making sure all current interfaces reside on | |
65 | * channels allowed by the current regulatory domain. | |
66 | */ | |
67 | #define REG_ENFORCE_GRACE_MS 60000 | |
68 | ||
52616f2b IP |
69 | /** |
70 | * enum reg_request_treatment - regulatory request treatment | |
71 | * | |
72 | * @REG_REQ_OK: continue processing the regulatory request | |
73 | * @REG_REQ_IGNORE: ignore the regulatory request | |
74 | * @REG_REQ_INTERSECT: the regulatory domain resulting from this request should | |
75 | * be intersected with the current one. | |
76 | * @REG_REQ_ALREADY_SET: the regulatory request will not change the current | |
77 | * regulatory settings, and no further processing is required. | |
52616f2b | 78 | */ |
2f92212b JB |
79 | enum reg_request_treatment { |
80 | REG_REQ_OK, | |
81 | REG_REQ_IGNORE, | |
82 | REG_REQ_INTERSECT, | |
83 | REG_REQ_ALREADY_SET, | |
84 | }; | |
85 | ||
a042994d LR |
86 | static struct regulatory_request core_request_world = { |
87 | .initiator = NL80211_REGDOM_SET_BY_CORE, | |
88 | .alpha2[0] = '0', | |
89 | .alpha2[1] = '0', | |
90 | .intersect = false, | |
91 | .processed = true, | |
92 | .country_ie_env = ENVIRON_ANY, | |
93 | }; | |
94 | ||
38fd2143 JB |
95 | /* |
96 | * Receipt of information from last regulatory request, | |
97 | * protected by RTNL (and can be accessed with RCU protection) | |
98 | */ | |
c492db37 | 99 | static struct regulatory_request __rcu *last_request = |
cec3f0ed | 100 | (void __force __rcu *)&core_request_world; |
734366de | 101 | |
b2e1b302 LR |
102 | /* To trigger userspace events */ |
103 | static struct platform_device *reg_pdev; | |
8318d78a | 104 | |
fb1fc7ad LR |
105 | /* |
106 | * Central wireless core regulatory domains, we only need two, | |
734366de | 107 | * the current one and a world regulatory domain in case we have no |
e8da2bb4 | 108 | * information to give us an alpha2. |
38fd2143 | 109 | * (protected by RTNL, can be read under RCU) |
fb1fc7ad | 110 | */ |
458f4f9e | 111 | const struct ieee80211_regdomain __rcu *cfg80211_regdomain; |
734366de | 112 | |
57b5ce07 LR |
113 | /* |
114 | * Number of devices that registered to the core | |
115 | * that support cellular base station regulatory hints | |
38fd2143 | 116 | * (protected by RTNL) |
57b5ce07 LR |
117 | */ |
118 | static int reg_num_devs_support_basehint; | |
119 | ||
52616f2b IP |
120 | /* |
121 | * State variable indicating if the platform on which the devices | |
122 | * are attached is operating in an indoor environment. The state variable | |
123 | * is relevant for all registered devices. | |
52616f2b IP |
124 | */ |
125 | static bool reg_is_indoor; | |
05050753 I |
126 | static spinlock_t reg_indoor_lock; |
127 | ||
128 | /* Used to track the userspace process controlling the indoor setting */ | |
129 | static u32 reg_is_indoor_portid; | |
52616f2b | 130 | |
b6863036 | 131 | static void restore_regulatory_settings(bool reset_user); |
c37722bd | 132 | |
458f4f9e JB |
133 | static const struct ieee80211_regdomain *get_cfg80211_regdom(void) |
134 | { | |
38fd2143 | 135 | return rtnl_dereference(cfg80211_regdomain); |
458f4f9e JB |
136 | } |
137 | ||
ad30ca2c | 138 | const struct ieee80211_regdomain *get_wiphy_regdom(struct wiphy *wiphy) |
458f4f9e | 139 | { |
38fd2143 | 140 | return rtnl_dereference(wiphy->regd); |
458f4f9e JB |
141 | } |
142 | ||
3ef121b5 LR |
143 | static const char *reg_dfs_region_str(enum nl80211_dfs_regions dfs_region) |
144 | { | |
145 | switch (dfs_region) { | |
146 | case NL80211_DFS_UNSET: | |
147 | return "unset"; | |
148 | case NL80211_DFS_FCC: | |
149 | return "FCC"; | |
150 | case NL80211_DFS_ETSI: | |
151 | return "ETSI"; | |
152 | case NL80211_DFS_JP: | |
153 | return "JP"; | |
154 | } | |
155 | return "Unknown"; | |
156 | } | |
157 | ||
6c474799 LR |
158 | enum nl80211_dfs_regions reg_get_dfs_region(struct wiphy *wiphy) |
159 | { | |
160 | const struct ieee80211_regdomain *regd = NULL; | |
161 | const struct ieee80211_regdomain *wiphy_regd = NULL; | |
162 | ||
163 | regd = get_cfg80211_regdom(); | |
164 | if (!wiphy) | |
165 | goto out; | |
166 | ||
167 | wiphy_regd = get_wiphy_regdom(wiphy); | |
168 | if (!wiphy_regd) | |
169 | goto out; | |
170 | ||
171 | if (wiphy_regd->dfs_region == regd->dfs_region) | |
172 | goto out; | |
173 | ||
c799ba6e JB |
174 | pr_debug("%s: device specific dfs_region (%s) disagrees with cfg80211's central dfs_region (%s)\n", |
175 | dev_name(&wiphy->dev), | |
176 | reg_dfs_region_str(wiphy_regd->dfs_region), | |
177 | reg_dfs_region_str(regd->dfs_region)); | |
6c474799 LR |
178 | |
179 | out: | |
180 | return regd->dfs_region; | |
181 | } | |
182 | ||
458f4f9e JB |
183 | static void rcu_free_regdom(const struct ieee80211_regdomain *r) |
184 | { | |
185 | if (!r) | |
186 | return; | |
187 | kfree_rcu((struct ieee80211_regdomain *)r, rcu_head); | |
188 | } | |
189 | ||
c492db37 JB |
190 | static struct regulatory_request *get_last_request(void) |
191 | { | |
38fd2143 | 192 | return rcu_dereference_rtnl(last_request); |
c492db37 JB |
193 | } |
194 | ||
e38f8a7a | 195 | /* Used to queue up regulatory hints */ |
fe33eb39 LR |
196 | static LIST_HEAD(reg_requests_list); |
197 | static spinlock_t reg_requests_lock; | |
198 | ||
e38f8a7a LR |
199 | /* Used to queue up beacon hints for review */ |
200 | static LIST_HEAD(reg_pending_beacons); | |
201 | static spinlock_t reg_pending_beacons_lock; | |
202 | ||
203 | /* Used to keep track of processed beacon hints */ | |
204 | static LIST_HEAD(reg_beacon_list); | |
205 | ||
206 | struct reg_beacon { | |
207 | struct list_head list; | |
208 | struct ieee80211_channel chan; | |
209 | }; | |
210 | ||
ad932f04 AN |
211 | static void reg_check_chans_work(struct work_struct *work); |
212 | static DECLARE_DELAYED_WORK(reg_check_chans, reg_check_chans_work); | |
213 | ||
f333a7a2 LR |
214 | static void reg_todo(struct work_struct *work); |
215 | static DECLARE_WORK(reg_work, reg_todo); | |
216 | ||
734366de JB |
217 | /* We keep a static world regulatory domain in case of the absence of CRDA */ |
218 | static const struct ieee80211_regdomain world_regdom = { | |
28981e5e | 219 | .n_reg_rules = 8, |
734366de JB |
220 | .alpha2 = "00", |
221 | .reg_rules = { | |
68798a62 LR |
222 | /* IEEE 802.11b/g, channels 1..11 */ |
223 | REG_RULE(2412-10, 2462+10, 40, 6, 20, 0), | |
43c771a1 | 224 | /* IEEE 802.11b/g, channels 12..13. */ |
c3826807 JB |
225 | REG_RULE(2467-10, 2472+10, 20, 6, 20, |
226 | NL80211_RRF_NO_IR | NL80211_RRF_AUTO_BW), | |
611b6a82 LR |
227 | /* IEEE 802.11 channel 14 - Only JP enables |
228 | * this and for 802.11b only */ | |
229 | REG_RULE(2484-10, 2484+10, 20, 6, 20, | |
8fe02e16 | 230 | NL80211_RRF_NO_IR | |
611b6a82 LR |
231 | NL80211_RRF_NO_OFDM), |
232 | /* IEEE 802.11a, channel 36..48 */ | |
c3826807 JB |
233 | REG_RULE(5180-10, 5240+10, 80, 6, 20, |
234 | NL80211_RRF_NO_IR | | |
235 | NL80211_RRF_AUTO_BW), | |
3fc71f77 | 236 | |
131a19bc | 237 | /* IEEE 802.11a, channel 52..64 - DFS required */ |
c3826807 | 238 | REG_RULE(5260-10, 5320+10, 80, 6, 20, |
8fe02e16 | 239 | NL80211_RRF_NO_IR | |
c3826807 | 240 | NL80211_RRF_AUTO_BW | |
131a19bc JB |
241 | NL80211_RRF_DFS), |
242 | ||
243 | /* IEEE 802.11a, channel 100..144 - DFS required */ | |
244 | REG_RULE(5500-10, 5720+10, 160, 6, 20, | |
8fe02e16 | 245 | NL80211_RRF_NO_IR | |
131a19bc | 246 | NL80211_RRF_DFS), |
3fc71f77 LR |
247 | |
248 | /* IEEE 802.11a, channel 149..165 */ | |
8ab9d85c | 249 | REG_RULE(5745-10, 5825+10, 80, 6, 20, |
8fe02e16 | 250 | NL80211_RRF_NO_IR), |
90cdc6df | 251 | |
8047d261 | 252 | /* IEEE 802.11ad (60GHz), channels 1..3 */ |
90cdc6df | 253 | REG_RULE(56160+2160*1-1080, 56160+2160*3+1080, 2160, 0, 0, 0), |
734366de JB |
254 | } |
255 | }; | |
256 | ||
38fd2143 | 257 | /* protected by RTNL */ |
a3d2eaf0 JB |
258 | static const struct ieee80211_regdomain *cfg80211_world_regdom = |
259 | &world_regdom; | |
734366de | 260 | |
6ee7d330 | 261 | static char *ieee80211_regdom = "00"; |
09d989d1 | 262 | static char user_alpha2[2]; |
6ee7d330 | 263 | |
734366de JB |
264 | module_param(ieee80211_regdom, charp, 0444); |
265 | MODULE_PARM_DESC(ieee80211_regdom, "IEEE 802.11 regulatory domain code"); | |
266 | ||
c888393b | 267 | static void reg_free_request(struct regulatory_request *request) |
5ad6ef5e | 268 | { |
d34265a3 JB |
269 | if (request == &core_request_world) |
270 | return; | |
271 | ||
c888393b AN |
272 | if (request != get_last_request()) |
273 | kfree(request); | |
274 | } | |
275 | ||
276 | static void reg_free_last_request(void) | |
277 | { | |
278 | struct regulatory_request *lr = get_last_request(); | |
279 | ||
5ad6ef5e LR |
280 | if (lr != &core_request_world && lr) |
281 | kfree_rcu(lr, rcu_head); | |
282 | } | |
283 | ||
05f1a3ea LR |
284 | static void reg_update_last_request(struct regulatory_request *request) |
285 | { | |
255e25b0 LR |
286 | struct regulatory_request *lr; |
287 | ||
288 | lr = get_last_request(); | |
289 | if (lr == request) | |
290 | return; | |
291 | ||
c888393b | 292 | reg_free_last_request(); |
05f1a3ea LR |
293 | rcu_assign_pointer(last_request, request); |
294 | } | |
295 | ||
379b82f4 JB |
296 | static void reset_regdomains(bool full_reset, |
297 | const struct ieee80211_regdomain *new_regdom) | |
734366de | 298 | { |
458f4f9e JB |
299 | const struct ieee80211_regdomain *r; |
300 | ||
38fd2143 | 301 | ASSERT_RTNL(); |
e8da2bb4 | 302 | |
458f4f9e JB |
303 | r = get_cfg80211_regdom(); |
304 | ||
942b25cf | 305 | /* avoid freeing static information or freeing something twice */ |
458f4f9e JB |
306 | if (r == cfg80211_world_regdom) |
307 | r = NULL; | |
942b25cf JB |
308 | if (cfg80211_world_regdom == &world_regdom) |
309 | cfg80211_world_regdom = NULL; | |
458f4f9e JB |
310 | if (r == &world_regdom) |
311 | r = NULL; | |
942b25cf | 312 | |
458f4f9e JB |
313 | rcu_free_regdom(r); |
314 | rcu_free_regdom(cfg80211_world_regdom); | |
734366de | 315 | |
a3d2eaf0 | 316 | cfg80211_world_regdom = &world_regdom; |
458f4f9e | 317 | rcu_assign_pointer(cfg80211_regdomain, new_regdom); |
a042994d LR |
318 | |
319 | if (!full_reset) | |
320 | return; | |
321 | ||
05f1a3ea | 322 | reg_update_last_request(&core_request_world); |
734366de JB |
323 | } |
324 | ||
fb1fc7ad LR |
325 | /* |
326 | * Dynamic world regulatory domain requested by the wireless | |
327 | * core upon initialization | |
328 | */ | |
a3d2eaf0 | 329 | static void update_world_regdomain(const struct ieee80211_regdomain *rd) |
734366de | 330 | { |
c492db37 | 331 | struct regulatory_request *lr; |
734366de | 332 | |
c492db37 JB |
333 | lr = get_last_request(); |
334 | ||
335 | WARN_ON(!lr); | |
734366de | 336 | |
379b82f4 | 337 | reset_regdomains(false, rd); |
734366de JB |
338 | |
339 | cfg80211_world_regdom = rd; | |
734366de | 340 | } |
734366de | 341 | |
a3d2eaf0 | 342 | bool is_world_regdom(const char *alpha2) |
b2e1b302 LR |
343 | { |
344 | if (!alpha2) | |
345 | return false; | |
1a919318 | 346 | return alpha2[0] == '0' && alpha2[1] == '0'; |
b2e1b302 | 347 | } |
8318d78a | 348 | |
a3d2eaf0 | 349 | static bool is_alpha2_set(const char *alpha2) |
b2e1b302 LR |
350 | { |
351 | if (!alpha2) | |
352 | return false; | |
1a919318 | 353 | return alpha2[0] && alpha2[1]; |
b2e1b302 | 354 | } |
8318d78a | 355 | |
a3d2eaf0 | 356 | static bool is_unknown_alpha2(const char *alpha2) |
b2e1b302 LR |
357 | { |
358 | if (!alpha2) | |
359 | return false; | |
fb1fc7ad LR |
360 | /* |
361 | * Special case where regulatory domain was built by driver | |
362 | * but a specific alpha2 cannot be determined | |
363 | */ | |
1a919318 | 364 | return alpha2[0] == '9' && alpha2[1] == '9'; |
b2e1b302 | 365 | } |
8318d78a | 366 | |
3f2355cb LR |
367 | static bool is_intersected_alpha2(const char *alpha2) |
368 | { | |
369 | if (!alpha2) | |
370 | return false; | |
fb1fc7ad LR |
371 | /* |
372 | * Special case where regulatory domain is the | |
3f2355cb | 373 | * result of an intersection between two regulatory domain |
fb1fc7ad LR |
374 | * structures |
375 | */ | |
1a919318 | 376 | return alpha2[0] == '9' && alpha2[1] == '8'; |
3f2355cb LR |
377 | } |
378 | ||
a3d2eaf0 | 379 | static bool is_an_alpha2(const char *alpha2) |
b2e1b302 LR |
380 | { |
381 | if (!alpha2) | |
382 | return false; | |
1a919318 | 383 | return isalpha(alpha2[0]) && isalpha(alpha2[1]); |
b2e1b302 | 384 | } |
8318d78a | 385 | |
a3d2eaf0 | 386 | static bool alpha2_equal(const char *alpha2_x, const char *alpha2_y) |
b2e1b302 LR |
387 | { |
388 | if (!alpha2_x || !alpha2_y) | |
389 | return false; | |
1a919318 | 390 | return alpha2_x[0] == alpha2_y[0] && alpha2_x[1] == alpha2_y[1]; |
b2e1b302 LR |
391 | } |
392 | ||
69b1572b | 393 | static bool regdom_changes(const char *alpha2) |
b2e1b302 | 394 | { |
458f4f9e | 395 | const struct ieee80211_regdomain *r = get_cfg80211_regdom(); |
761cf7ec | 396 | |
458f4f9e | 397 | if (!r) |
b2e1b302 | 398 | return true; |
458f4f9e | 399 | return !alpha2_equal(r->alpha2, alpha2); |
b2e1b302 LR |
400 | } |
401 | ||
09d989d1 LR |
402 | /* |
403 | * The NL80211_REGDOM_SET_BY_USER regdom alpha2 is cached, this lets | |
404 | * you know if a valid regulatory hint with NL80211_REGDOM_SET_BY_USER | |
405 | * has ever been issued. | |
406 | */ | |
407 | static bool is_user_regdom_saved(void) | |
408 | { | |
409 | if (user_alpha2[0] == '9' && user_alpha2[1] == '7') | |
410 | return false; | |
411 | ||
412 | /* This would indicate a mistake on the design */ | |
1a919318 | 413 | if (WARN(!is_world_regdom(user_alpha2) && !is_an_alpha2(user_alpha2), |
09d989d1 | 414 | "Unexpected user alpha2: %c%c\n", |
1a919318 | 415 | user_alpha2[0], user_alpha2[1])) |
09d989d1 LR |
416 | return false; |
417 | ||
418 | return true; | |
419 | } | |
420 | ||
e9763c3c JB |
421 | static const struct ieee80211_regdomain * |
422 | reg_copy_regd(const struct ieee80211_regdomain *src_regd) | |
3b377ea9 JL |
423 | { |
424 | struct ieee80211_regdomain *regd; | |
e9763c3c | 425 | int size_of_regd; |
3b377ea9 JL |
426 | unsigned int i; |
427 | ||
82f20856 JB |
428 | size_of_regd = |
429 | sizeof(struct ieee80211_regdomain) + | |
430 | src_regd->n_reg_rules * sizeof(struct ieee80211_reg_rule); | |
3b377ea9 JL |
431 | |
432 | regd = kzalloc(size_of_regd, GFP_KERNEL); | |
433 | if (!regd) | |
e9763c3c | 434 | return ERR_PTR(-ENOMEM); |
3b377ea9 JL |
435 | |
436 | memcpy(regd, src_regd, sizeof(struct ieee80211_regdomain)); | |
437 | ||
438 | for (i = 0; i < src_regd->n_reg_rules; i++) | |
439 | memcpy(®d->reg_rules[i], &src_regd->reg_rules[i], | |
e9763c3c | 440 | sizeof(struct ieee80211_reg_rule)); |
3b377ea9 | 441 | |
e9763c3c | 442 | return regd; |
3b377ea9 JL |
443 | } |
444 | ||
445 | #ifdef CONFIG_CFG80211_INTERNAL_REGDB | |
c7d319e5 | 446 | struct reg_regdb_apply_request { |
3b377ea9 | 447 | struct list_head list; |
c7d319e5 | 448 | const struct ieee80211_regdomain *regdom; |
3b377ea9 JL |
449 | }; |
450 | ||
c7d319e5 JB |
451 | static LIST_HEAD(reg_regdb_apply_list); |
452 | static DEFINE_MUTEX(reg_regdb_apply_mutex); | |
3b377ea9 | 453 | |
c7d319e5 | 454 | static void reg_regdb_apply(struct work_struct *work) |
3b377ea9 | 455 | { |
c7d319e5 | 456 | struct reg_regdb_apply_request *request; |
a85d0d7f | 457 | |
5fe231e8 | 458 | rtnl_lock(); |
3b377ea9 | 459 | |
c7d319e5 JB |
460 | mutex_lock(®_regdb_apply_mutex); |
461 | while (!list_empty(®_regdb_apply_list)) { | |
462 | request = list_first_entry(®_regdb_apply_list, | |
463 | struct reg_regdb_apply_request, | |
3b377ea9 JL |
464 | list); |
465 | list_del(&request->list); | |
466 | ||
c7d319e5 | 467 | set_regdom(request->regdom, REGD_SOURCE_INTERNAL_DB); |
3b377ea9 JL |
468 | kfree(request); |
469 | } | |
c7d319e5 | 470 | mutex_unlock(®_regdb_apply_mutex); |
a85d0d7f | 471 | |
5fe231e8 | 472 | rtnl_unlock(); |
3b377ea9 JL |
473 | } |
474 | ||
c7d319e5 | 475 | static DECLARE_WORK(reg_regdb_work, reg_regdb_apply); |
3b377ea9 | 476 | |
fd453d3c | 477 | static int reg_query_builtin(const char *alpha2) |
3b377ea9 | 478 | { |
c7d319e5 JB |
479 | const struct ieee80211_regdomain *regdom = NULL; |
480 | struct reg_regdb_apply_request *request; | |
481 | unsigned int i; | |
482 | ||
483 | for (i = 0; i < reg_regdb_size; i++) { | |
484 | if (alpha2_equal(alpha2, reg_regdb[i]->alpha2)) { | |
485 | regdom = reg_regdb[i]; | |
486 | break; | |
487 | } | |
488 | } | |
489 | ||
490 | if (!regdom) | |
491 | return -ENODATA; | |
3b377ea9 | 492 | |
c7d319e5 | 493 | request = kzalloc(sizeof(struct reg_regdb_apply_request), GFP_KERNEL); |
3b377ea9 | 494 | if (!request) |
c7d319e5 | 495 | return -ENOMEM; |
3b377ea9 | 496 | |
c7d319e5 JB |
497 | request->regdom = reg_copy_regd(regdom); |
498 | if (IS_ERR_OR_NULL(request->regdom)) { | |
499 | kfree(request); | |
500 | return -ENOMEM; | |
501 | } | |
3b377ea9 | 502 | |
c7d319e5 JB |
503 | mutex_lock(®_regdb_apply_mutex); |
504 | list_add_tail(&request->list, ®_regdb_apply_list); | |
505 | mutex_unlock(®_regdb_apply_mutex); | |
3b377ea9 JL |
506 | |
507 | schedule_work(®_regdb_work); | |
c7d319e5 JB |
508 | |
509 | return 0; | |
3b377ea9 | 510 | } |
80007efe LR |
511 | |
512 | /* Feel free to add any other sanity checks here */ | |
513 | static void reg_regdb_size_check(void) | |
514 | { | |
515 | /* We should ideally BUILD_BUG_ON() but then random builds would fail */ | |
516 | WARN_ONCE(!reg_regdb_size, "db.txt is empty, you should update it..."); | |
517 | } | |
3b377ea9 | 518 | #else |
80007efe | 519 | static inline void reg_regdb_size_check(void) {} |
fd453d3c | 520 | static inline int reg_query_builtin(const char *alpha2) |
c7d319e5 JB |
521 | { |
522 | return -ENODATA; | |
523 | } | |
3b377ea9 JL |
524 | #endif /* CONFIG_CFG80211_INTERNAL_REGDB */ |
525 | ||
b6863036 JB |
526 | #ifdef CONFIG_CFG80211_CRDA_SUPPORT |
527 | /* Max number of consecutive attempts to communicate with CRDA */ | |
528 | #define REG_MAX_CRDA_TIMEOUTS 10 | |
529 | ||
530 | static u32 reg_crda_timeouts; | |
531 | ||
532 | static void crda_timeout_work(struct work_struct *work); | |
533 | static DECLARE_DELAYED_WORK(crda_timeout, crda_timeout_work); | |
534 | ||
535 | static void crda_timeout_work(struct work_struct *work) | |
536 | { | |
c799ba6e | 537 | pr_debug("Timeout while waiting for CRDA to reply, restoring regulatory settings\n"); |
b6863036 JB |
538 | rtnl_lock(); |
539 | reg_crda_timeouts++; | |
540 | restore_regulatory_settings(true); | |
541 | rtnl_unlock(); | |
542 | } | |
543 | ||
544 | static void cancel_crda_timeout(void) | |
545 | { | |
546 | cancel_delayed_work(&crda_timeout); | |
547 | } | |
548 | ||
549 | static void cancel_crda_timeout_sync(void) | |
550 | { | |
551 | cancel_delayed_work_sync(&crda_timeout); | |
552 | } | |
553 | ||
554 | static void reset_crda_timeouts(void) | |
555 | { | |
556 | reg_crda_timeouts = 0; | |
557 | } | |
558 | ||
fb1fc7ad LR |
559 | /* |
560 | * This lets us keep regulatory code which is updated on a regulatory | |
1226d258 | 561 | * basis in userspace. |
fb1fc7ad | 562 | */ |
b2e1b302 LR |
563 | static int call_crda(const char *alpha2) |
564 | { | |
1226d258 JB |
565 | char country[12]; |
566 | char *env[] = { country, NULL }; | |
c7d319e5 | 567 | int ret; |
1226d258 JB |
568 | |
569 | snprintf(country, sizeof(country), "COUNTRY=%c%c", | |
570 | alpha2[0], alpha2[1]); | |
571 | ||
c37722bd | 572 | if (reg_crda_timeouts > REG_MAX_CRDA_TIMEOUTS) { |
042ab5fc | 573 | pr_debug("Exceeded CRDA call max attempts. Not calling CRDA\n"); |
c37722bd I |
574 | return -EINVAL; |
575 | } | |
576 | ||
b2e1b302 | 577 | if (!is_world_regdom((char *) alpha2)) |
042ab5fc | 578 | pr_debug("Calling CRDA for country: %c%c\n", |
c799ba6e | 579 | alpha2[0], alpha2[1]); |
b2e1b302 | 580 | else |
042ab5fc | 581 | pr_debug("Calling CRDA to update world regulatory domain\n"); |
b2e1b302 | 582 | |
c7d319e5 JB |
583 | ret = kobject_uevent_env(®_pdev->dev.kobj, KOBJ_CHANGE, env); |
584 | if (ret) | |
585 | return ret; | |
586 | ||
587 | queue_delayed_work(system_power_efficient_wq, | |
b6863036 | 588 | &crda_timeout, msecs_to_jiffies(3142)); |
c7d319e5 | 589 | return 0; |
b2e1b302 | 590 | } |
b6863036 JB |
591 | #else |
592 | static inline void cancel_crda_timeout(void) {} | |
593 | static inline void cancel_crda_timeout_sync(void) {} | |
594 | static inline void reset_crda_timeouts(void) {} | |
595 | static inline int call_crda(const char *alpha2) | |
596 | { | |
597 | return -ENODATA; | |
598 | } | |
599 | #endif /* CONFIG_CFG80211_CRDA_SUPPORT */ | |
b2e1b302 | 600 | |
cecbb069 | 601 | static bool reg_query_database(struct regulatory_request *request) |
fe6631ff | 602 | { |
c7d319e5 | 603 | /* query internal regulatory database (if it exists) */ |
fd453d3c | 604 | if (reg_query_builtin(request->alpha2) == 0) |
c7d319e5 | 605 | return true; |
eeca9fce | 606 | |
c7d319e5 JB |
607 | if (call_crda(request->alpha2) == 0) |
608 | return true; | |
609 | ||
610 | return false; | |
fe6631ff LR |
611 | } |
612 | ||
e438768f | 613 | bool reg_is_valid_request(const char *alpha2) |
b2e1b302 | 614 | { |
c492db37 | 615 | struct regulatory_request *lr = get_last_request(); |
61405e97 | 616 | |
c492db37 | 617 | if (!lr || lr->processed) |
f6037d09 JB |
618 | return false; |
619 | ||
c492db37 | 620 | return alpha2_equal(lr->alpha2, alpha2); |
b2e1b302 | 621 | } |
8318d78a | 622 | |
e3961af1 JD |
623 | static const struct ieee80211_regdomain *reg_get_regdomain(struct wiphy *wiphy) |
624 | { | |
625 | struct regulatory_request *lr = get_last_request(); | |
626 | ||
627 | /* | |
628 | * Follow the driver's regulatory domain, if present, unless a country | |
629 | * IE has been processed or a user wants to help complaince further | |
630 | */ | |
631 | if (lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && | |
632 | lr->initiator != NL80211_REGDOM_SET_BY_USER && | |
633 | wiphy->regd) | |
634 | return get_wiphy_regdom(wiphy); | |
635 | ||
636 | return get_cfg80211_regdom(); | |
637 | } | |
638 | ||
a6d4a534 AN |
639 | static unsigned int |
640 | reg_get_max_bandwidth_from_range(const struct ieee80211_regdomain *rd, | |
641 | const struct ieee80211_reg_rule *rule) | |
97524820 JD |
642 | { |
643 | const struct ieee80211_freq_range *freq_range = &rule->freq_range; | |
644 | const struct ieee80211_freq_range *freq_range_tmp; | |
645 | const struct ieee80211_reg_rule *tmp; | |
646 | u32 start_freq, end_freq, idx, no; | |
647 | ||
648 | for (idx = 0; idx < rd->n_reg_rules; idx++) | |
649 | if (rule == &rd->reg_rules[idx]) | |
650 | break; | |
651 | ||
652 | if (idx == rd->n_reg_rules) | |
653 | return 0; | |
654 | ||
655 | /* get start_freq */ | |
656 | no = idx; | |
657 | ||
658 | while (no) { | |
659 | tmp = &rd->reg_rules[--no]; | |
660 | freq_range_tmp = &tmp->freq_range; | |
661 | ||
662 | if (freq_range_tmp->end_freq_khz < freq_range->start_freq_khz) | |
663 | break; | |
664 | ||
97524820 JD |
665 | freq_range = freq_range_tmp; |
666 | } | |
667 | ||
668 | start_freq = freq_range->start_freq_khz; | |
669 | ||
670 | /* get end_freq */ | |
671 | freq_range = &rule->freq_range; | |
672 | no = idx; | |
673 | ||
674 | while (no < rd->n_reg_rules - 1) { | |
675 | tmp = &rd->reg_rules[++no]; | |
676 | freq_range_tmp = &tmp->freq_range; | |
677 | ||
678 | if (freq_range_tmp->start_freq_khz > freq_range->end_freq_khz) | |
679 | break; | |
680 | ||
97524820 JD |
681 | freq_range = freq_range_tmp; |
682 | } | |
683 | ||
684 | end_freq = freq_range->end_freq_khz; | |
685 | ||
686 | return end_freq - start_freq; | |
687 | } | |
688 | ||
a6d4a534 AN |
689 | unsigned int reg_get_max_bandwidth(const struct ieee80211_regdomain *rd, |
690 | const struct ieee80211_reg_rule *rule) | |
691 | { | |
692 | unsigned int bw = reg_get_max_bandwidth_from_range(rd, rule); | |
693 | ||
694 | if (rule->flags & NL80211_RRF_NO_160MHZ) | |
695 | bw = min_t(unsigned int, bw, MHZ_TO_KHZ(80)); | |
696 | if (rule->flags & NL80211_RRF_NO_80MHZ) | |
697 | bw = min_t(unsigned int, bw, MHZ_TO_KHZ(40)); | |
698 | ||
699 | /* | |
700 | * HT40+/HT40- limits are handled per-channel. Only limit BW if both | |
701 | * are not allowed. | |
702 | */ | |
703 | if (rule->flags & NL80211_RRF_NO_HT40MINUS && | |
704 | rule->flags & NL80211_RRF_NO_HT40PLUS) | |
705 | bw = min_t(unsigned int, bw, MHZ_TO_KHZ(20)); | |
706 | ||
707 | return bw; | |
708 | } | |
709 | ||
b2e1b302 | 710 | /* Sanity check on a regulatory rule */ |
a3d2eaf0 | 711 | static bool is_valid_reg_rule(const struct ieee80211_reg_rule *rule) |
8318d78a | 712 | { |
a3d2eaf0 | 713 | const struct ieee80211_freq_range *freq_range = &rule->freq_range; |
b2e1b302 LR |
714 | u32 freq_diff; |
715 | ||
91e99004 | 716 | if (freq_range->start_freq_khz <= 0 || freq_range->end_freq_khz <= 0) |
b2e1b302 LR |
717 | return false; |
718 | ||
719 | if (freq_range->start_freq_khz > freq_range->end_freq_khz) | |
720 | return false; | |
721 | ||
722 | freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz; | |
723 | ||
bd05f28e | 724 | if (freq_range->end_freq_khz <= freq_range->start_freq_khz || |
1a919318 | 725 | freq_range->max_bandwidth_khz > freq_diff) |
b2e1b302 LR |
726 | return false; |
727 | ||
728 | return true; | |
729 | } | |
730 | ||
a3d2eaf0 | 731 | static bool is_valid_rd(const struct ieee80211_regdomain *rd) |
b2e1b302 | 732 | { |
a3d2eaf0 | 733 | const struct ieee80211_reg_rule *reg_rule = NULL; |
b2e1b302 | 734 | unsigned int i; |
8318d78a | 735 | |
b2e1b302 LR |
736 | if (!rd->n_reg_rules) |
737 | return false; | |
8318d78a | 738 | |
88dc1c3f LR |
739 | if (WARN_ON(rd->n_reg_rules > NL80211_MAX_SUPP_REG_RULES)) |
740 | return false; | |
741 | ||
b2e1b302 LR |
742 | for (i = 0; i < rd->n_reg_rules; i++) { |
743 | reg_rule = &rd->reg_rules[i]; | |
744 | if (!is_valid_reg_rule(reg_rule)) | |
745 | return false; | |
746 | } | |
747 | ||
748 | return true; | |
8318d78a JB |
749 | } |
750 | ||
038659e7 | 751 | static bool reg_does_bw_fit(const struct ieee80211_freq_range *freq_range, |
fe7ef5e9 | 752 | u32 center_freq_khz, u32 bw_khz) |
b2e1b302 | 753 | { |
038659e7 LR |
754 | u32 start_freq_khz, end_freq_khz; |
755 | ||
756 | start_freq_khz = center_freq_khz - (bw_khz/2); | |
757 | end_freq_khz = center_freq_khz + (bw_khz/2); | |
758 | ||
759 | if (start_freq_khz >= freq_range->start_freq_khz && | |
760 | end_freq_khz <= freq_range->end_freq_khz) | |
761 | return true; | |
762 | ||
763 | return false; | |
b2e1b302 | 764 | } |
8318d78a | 765 | |
0c7dc45d LR |
766 | /** |
767 | * freq_in_rule_band - tells us if a frequency is in a frequency band | |
768 | * @freq_range: frequency rule we want to query | |
769 | * @freq_khz: frequency we are inquiring about | |
770 | * | |
771 | * This lets us know if a specific frequency rule is or is not relevant to | |
772 | * a specific frequency's band. Bands are device specific and artificial | |
64629b9d VK |
773 | * definitions (the "2.4 GHz band", the "5 GHz band" and the "60GHz band"), |
774 | * however it is safe for now to assume that a frequency rule should not be | |
775 | * part of a frequency's band if the start freq or end freq are off by more | |
776 | * than 2 GHz for the 2.4 and 5 GHz bands, and by more than 10 GHz for the | |
777 | * 60 GHz band. | |
0c7dc45d LR |
778 | * This resolution can be lowered and should be considered as we add |
779 | * regulatory rule support for other "bands". | |
780 | **/ | |
781 | static bool freq_in_rule_band(const struct ieee80211_freq_range *freq_range, | |
1a919318 | 782 | u32 freq_khz) |
0c7dc45d LR |
783 | { |
784 | #define ONE_GHZ_IN_KHZ 1000000 | |
64629b9d VK |
785 | /* |
786 | * From 802.11ad: directional multi-gigabit (DMG): | |
787 | * Pertaining to operation in a frequency band containing a channel | |
788 | * with the Channel starting frequency above 45 GHz. | |
789 | */ | |
790 | u32 limit = freq_khz > 45 * ONE_GHZ_IN_KHZ ? | |
791 | 10 * ONE_GHZ_IN_KHZ : 2 * ONE_GHZ_IN_KHZ; | |
792 | if (abs(freq_khz - freq_range->start_freq_khz) <= limit) | |
0c7dc45d | 793 | return true; |
64629b9d | 794 | if (abs(freq_khz - freq_range->end_freq_khz) <= limit) |
0c7dc45d LR |
795 | return true; |
796 | return false; | |
797 | #undef ONE_GHZ_IN_KHZ | |
798 | } | |
799 | ||
adbfb058 LR |
800 | /* |
801 | * Later on we can perhaps use the more restrictive DFS | |
802 | * region but we don't have information for that yet so | |
803 | * for now simply disallow conflicts. | |
804 | */ | |
805 | static enum nl80211_dfs_regions | |
806 | reg_intersect_dfs_region(const enum nl80211_dfs_regions dfs_region1, | |
807 | const enum nl80211_dfs_regions dfs_region2) | |
808 | { | |
809 | if (dfs_region1 != dfs_region2) | |
810 | return NL80211_DFS_UNSET; | |
811 | return dfs_region1; | |
812 | } | |
813 | ||
fb1fc7ad LR |
814 | /* |
815 | * Helper for regdom_intersect(), this does the real | |
816 | * mathematical intersection fun | |
817 | */ | |
97524820 JD |
818 | static int reg_rules_intersect(const struct ieee80211_regdomain *rd1, |
819 | const struct ieee80211_regdomain *rd2, | |
820 | const struct ieee80211_reg_rule *rule1, | |
1a919318 JB |
821 | const struct ieee80211_reg_rule *rule2, |
822 | struct ieee80211_reg_rule *intersected_rule) | |
9c96477d LR |
823 | { |
824 | const struct ieee80211_freq_range *freq_range1, *freq_range2; | |
825 | struct ieee80211_freq_range *freq_range; | |
826 | const struct ieee80211_power_rule *power_rule1, *power_rule2; | |
827 | struct ieee80211_power_rule *power_rule; | |
97524820 | 828 | u32 freq_diff, max_bandwidth1, max_bandwidth2; |
9c96477d LR |
829 | |
830 | freq_range1 = &rule1->freq_range; | |
831 | freq_range2 = &rule2->freq_range; | |
832 | freq_range = &intersected_rule->freq_range; | |
833 | ||
834 | power_rule1 = &rule1->power_rule; | |
835 | power_rule2 = &rule2->power_rule; | |
836 | power_rule = &intersected_rule->power_rule; | |
837 | ||
838 | freq_range->start_freq_khz = max(freq_range1->start_freq_khz, | |
1a919318 | 839 | freq_range2->start_freq_khz); |
9c96477d | 840 | freq_range->end_freq_khz = min(freq_range1->end_freq_khz, |
1a919318 | 841 | freq_range2->end_freq_khz); |
97524820 JD |
842 | |
843 | max_bandwidth1 = freq_range1->max_bandwidth_khz; | |
844 | max_bandwidth2 = freq_range2->max_bandwidth_khz; | |
845 | ||
b0dfd2ea JD |
846 | if (rule1->flags & NL80211_RRF_AUTO_BW) |
847 | max_bandwidth1 = reg_get_max_bandwidth(rd1, rule1); | |
848 | if (rule2->flags & NL80211_RRF_AUTO_BW) | |
849 | max_bandwidth2 = reg_get_max_bandwidth(rd2, rule2); | |
97524820 JD |
850 | |
851 | freq_range->max_bandwidth_khz = min(max_bandwidth1, max_bandwidth2); | |
9c96477d | 852 | |
b0dfd2ea JD |
853 | intersected_rule->flags = rule1->flags | rule2->flags; |
854 | ||
855 | /* | |
856 | * In case NL80211_RRF_AUTO_BW requested for both rules | |
857 | * set AUTO_BW in intersected rule also. Next we will | |
858 | * calculate BW correctly in handle_channel function. | |
859 | * In other case remove AUTO_BW flag while we calculate | |
860 | * maximum bandwidth correctly and auto calculation is | |
861 | * not required. | |
862 | */ | |
863 | if ((rule1->flags & NL80211_RRF_AUTO_BW) && | |
864 | (rule2->flags & NL80211_RRF_AUTO_BW)) | |
865 | intersected_rule->flags |= NL80211_RRF_AUTO_BW; | |
866 | else | |
867 | intersected_rule->flags &= ~NL80211_RRF_AUTO_BW; | |
868 | ||
9c96477d LR |
869 | freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz; |
870 | if (freq_range->max_bandwidth_khz > freq_diff) | |
871 | freq_range->max_bandwidth_khz = freq_diff; | |
872 | ||
873 | power_rule->max_eirp = min(power_rule1->max_eirp, | |
874 | power_rule2->max_eirp); | |
875 | power_rule->max_antenna_gain = min(power_rule1->max_antenna_gain, | |
876 | power_rule2->max_antenna_gain); | |
877 | ||
089027e5 JD |
878 | intersected_rule->dfs_cac_ms = max(rule1->dfs_cac_ms, |
879 | rule2->dfs_cac_ms); | |
880 | ||
9c96477d LR |
881 | if (!is_valid_reg_rule(intersected_rule)) |
882 | return -EINVAL; | |
883 | ||
884 | return 0; | |
885 | } | |
886 | ||
a62a1aed EP |
887 | /* check whether old rule contains new rule */ |
888 | static bool rule_contains(struct ieee80211_reg_rule *r1, | |
889 | struct ieee80211_reg_rule *r2) | |
890 | { | |
891 | /* for simplicity, currently consider only same flags */ | |
892 | if (r1->flags != r2->flags) | |
893 | return false; | |
894 | ||
895 | /* verify r1 is more restrictive */ | |
896 | if ((r1->power_rule.max_antenna_gain > | |
897 | r2->power_rule.max_antenna_gain) || | |
898 | r1->power_rule.max_eirp > r2->power_rule.max_eirp) | |
899 | return false; | |
900 | ||
901 | /* make sure r2's range is contained within r1 */ | |
902 | if (r1->freq_range.start_freq_khz > r2->freq_range.start_freq_khz || | |
903 | r1->freq_range.end_freq_khz < r2->freq_range.end_freq_khz) | |
904 | return false; | |
905 | ||
906 | /* and finally verify that r1.max_bw >= r2.max_bw */ | |
907 | if (r1->freq_range.max_bandwidth_khz < | |
908 | r2->freq_range.max_bandwidth_khz) | |
909 | return false; | |
910 | ||
911 | return true; | |
912 | } | |
913 | ||
914 | /* add or extend current rules. do nothing if rule is already contained */ | |
915 | static void add_rule(struct ieee80211_reg_rule *rule, | |
916 | struct ieee80211_reg_rule *reg_rules, u32 *n_rules) | |
917 | { | |
918 | struct ieee80211_reg_rule *tmp_rule; | |
919 | int i; | |
920 | ||
921 | for (i = 0; i < *n_rules; i++) { | |
922 | tmp_rule = ®_rules[i]; | |
923 | /* rule is already contained - do nothing */ | |
924 | if (rule_contains(tmp_rule, rule)) | |
925 | return; | |
926 | ||
927 | /* extend rule if possible */ | |
928 | if (rule_contains(rule, tmp_rule)) { | |
929 | memcpy(tmp_rule, rule, sizeof(*rule)); | |
930 | return; | |
931 | } | |
932 | } | |
933 | ||
934 | memcpy(®_rules[*n_rules], rule, sizeof(*rule)); | |
935 | (*n_rules)++; | |
936 | } | |
937 | ||
9c96477d LR |
938 | /** |
939 | * regdom_intersect - do the intersection between two regulatory domains | |
940 | * @rd1: first regulatory domain | |
941 | * @rd2: second regulatory domain | |
942 | * | |
943 | * Use this function to get the intersection between two regulatory domains. | |
944 | * Once completed we will mark the alpha2 for the rd as intersected, "98", | |
945 | * as no one single alpha2 can represent this regulatory domain. | |
946 | * | |
947 | * Returns a pointer to the regulatory domain structure which will hold the | |
948 | * resulting intersection of rules between rd1 and rd2. We will | |
949 | * kzalloc() this structure for you. | |
950 | */ | |
1a919318 JB |
951 | static struct ieee80211_regdomain * |
952 | regdom_intersect(const struct ieee80211_regdomain *rd1, | |
953 | const struct ieee80211_regdomain *rd2) | |
9c96477d LR |
954 | { |
955 | int r, size_of_regd; | |
956 | unsigned int x, y; | |
a62a1aed | 957 | unsigned int num_rules = 0; |
9c96477d | 958 | const struct ieee80211_reg_rule *rule1, *rule2; |
a62a1aed | 959 | struct ieee80211_reg_rule intersected_rule; |
9c96477d | 960 | struct ieee80211_regdomain *rd; |
9c96477d LR |
961 | |
962 | if (!rd1 || !rd2) | |
963 | return NULL; | |
964 | ||
fb1fc7ad LR |
965 | /* |
966 | * First we get a count of the rules we'll need, then we actually | |
9c96477d LR |
967 | * build them. This is to so we can malloc() and free() a |
968 | * regdomain once. The reason we use reg_rules_intersect() here | |
969 | * is it will return -EINVAL if the rule computed makes no sense. | |
fb1fc7ad LR |
970 | * All rules that do check out OK are valid. |
971 | */ | |
9c96477d LR |
972 | |
973 | for (x = 0; x < rd1->n_reg_rules; x++) { | |
974 | rule1 = &rd1->reg_rules[x]; | |
975 | for (y = 0; y < rd2->n_reg_rules; y++) { | |
976 | rule2 = &rd2->reg_rules[y]; | |
97524820 | 977 | if (!reg_rules_intersect(rd1, rd2, rule1, rule2, |
a62a1aed | 978 | &intersected_rule)) |
9c96477d | 979 | num_rules++; |
9c96477d LR |
980 | } |
981 | } | |
982 | ||
983 | if (!num_rules) | |
984 | return NULL; | |
985 | ||
986 | size_of_regd = sizeof(struct ieee80211_regdomain) + | |
82f20856 | 987 | num_rules * sizeof(struct ieee80211_reg_rule); |
9c96477d LR |
988 | |
989 | rd = kzalloc(size_of_regd, GFP_KERNEL); | |
990 | if (!rd) | |
991 | return NULL; | |
992 | ||
a62a1aed | 993 | for (x = 0; x < rd1->n_reg_rules; x++) { |
9c96477d | 994 | rule1 = &rd1->reg_rules[x]; |
a62a1aed | 995 | for (y = 0; y < rd2->n_reg_rules; y++) { |
9c96477d | 996 | rule2 = &rd2->reg_rules[y]; |
97524820 | 997 | r = reg_rules_intersect(rd1, rd2, rule1, rule2, |
a62a1aed | 998 | &intersected_rule); |
fb1fc7ad LR |
999 | /* |
1000 | * No need to memset here the intersected rule here as | |
1001 | * we're not using the stack anymore | |
1002 | */ | |
9c96477d LR |
1003 | if (r) |
1004 | continue; | |
9c96477d | 1005 | |
a62a1aed EP |
1006 | add_rule(&intersected_rule, rd->reg_rules, |
1007 | &rd->n_reg_rules); | |
1008 | } | |
9c96477d LR |
1009 | } |
1010 | ||
9c96477d LR |
1011 | rd->alpha2[0] = '9'; |
1012 | rd->alpha2[1] = '8'; | |
adbfb058 LR |
1013 | rd->dfs_region = reg_intersect_dfs_region(rd1->dfs_region, |
1014 | rd2->dfs_region); | |
9c96477d LR |
1015 | |
1016 | return rd; | |
1017 | } | |
1018 | ||
fb1fc7ad LR |
1019 | /* |
1020 | * XXX: add support for the rest of enum nl80211_reg_rule_flags, we may | |
1021 | * want to just have the channel structure use these | |
1022 | */ | |
b2e1b302 LR |
1023 | static u32 map_regdom_flags(u32 rd_flags) |
1024 | { | |
1025 | u32 channel_flags = 0; | |
8fe02e16 LR |
1026 | if (rd_flags & NL80211_RRF_NO_IR_ALL) |
1027 | channel_flags |= IEEE80211_CHAN_NO_IR; | |
b2e1b302 LR |
1028 | if (rd_flags & NL80211_RRF_DFS) |
1029 | channel_flags |= IEEE80211_CHAN_RADAR; | |
03f6b084 SF |
1030 | if (rd_flags & NL80211_RRF_NO_OFDM) |
1031 | channel_flags |= IEEE80211_CHAN_NO_OFDM; | |
570dbde1 DS |
1032 | if (rd_flags & NL80211_RRF_NO_OUTDOOR) |
1033 | channel_flags |= IEEE80211_CHAN_INDOOR_ONLY; | |
06f207fc AN |
1034 | if (rd_flags & NL80211_RRF_IR_CONCURRENT) |
1035 | channel_flags |= IEEE80211_CHAN_IR_CONCURRENT; | |
a6d4a534 AN |
1036 | if (rd_flags & NL80211_RRF_NO_HT40MINUS) |
1037 | channel_flags |= IEEE80211_CHAN_NO_HT40MINUS; | |
1038 | if (rd_flags & NL80211_RRF_NO_HT40PLUS) | |
1039 | channel_flags |= IEEE80211_CHAN_NO_HT40PLUS; | |
1040 | if (rd_flags & NL80211_RRF_NO_80MHZ) | |
1041 | channel_flags |= IEEE80211_CHAN_NO_80MHZ; | |
1042 | if (rd_flags & NL80211_RRF_NO_160MHZ) | |
1043 | channel_flags |= IEEE80211_CHAN_NO_160MHZ; | |
b2e1b302 LR |
1044 | return channel_flags; |
1045 | } | |
1046 | ||
361c9c8b | 1047 | static const struct ieee80211_reg_rule * |
49172874 | 1048 | freq_reg_info_regd(u32 center_freq, |
4edd5698 | 1049 | const struct ieee80211_regdomain *regd, u32 bw) |
8318d78a JB |
1050 | { |
1051 | int i; | |
0c7dc45d | 1052 | bool band_rule_found = false; |
038659e7 LR |
1053 | bool bw_fits = false; |
1054 | ||
3e0c3ff3 | 1055 | if (!regd) |
361c9c8b | 1056 | return ERR_PTR(-EINVAL); |
b2e1b302 | 1057 | |
3e0c3ff3 | 1058 | for (i = 0; i < regd->n_reg_rules; i++) { |
b2e1b302 LR |
1059 | const struct ieee80211_reg_rule *rr; |
1060 | const struct ieee80211_freq_range *fr = NULL; | |
b2e1b302 | 1061 | |
3e0c3ff3 | 1062 | rr = ®d->reg_rules[i]; |
b2e1b302 | 1063 | fr = &rr->freq_range; |
0c7dc45d | 1064 | |
fb1fc7ad LR |
1065 | /* |
1066 | * We only need to know if one frequency rule was | |
0c7dc45d | 1067 | * was in center_freq's band, that's enough, so lets |
fb1fc7ad LR |
1068 | * not overwrite it once found |
1069 | */ | |
0c7dc45d LR |
1070 | if (!band_rule_found) |
1071 | band_rule_found = freq_in_rule_band(fr, center_freq); | |
1072 | ||
4edd5698 | 1073 | bw_fits = reg_does_bw_fit(fr, center_freq, bw); |
0c7dc45d | 1074 | |
361c9c8b JB |
1075 | if (band_rule_found && bw_fits) |
1076 | return rr; | |
8318d78a JB |
1077 | } |
1078 | ||
0c7dc45d | 1079 | if (!band_rule_found) |
361c9c8b | 1080 | return ERR_PTR(-ERANGE); |
0c7dc45d | 1081 | |
361c9c8b | 1082 | return ERR_PTR(-EINVAL); |
b2e1b302 LR |
1083 | } |
1084 | ||
8de1c63b JB |
1085 | static const struct ieee80211_reg_rule * |
1086 | __freq_reg_info(struct wiphy *wiphy, u32 center_freq, u32 min_bw) | |
1fa25e41 | 1087 | { |
4edd5698 MM |
1088 | const struct ieee80211_regdomain *regd = reg_get_regdomain(wiphy); |
1089 | const struct ieee80211_reg_rule *reg_rule = NULL; | |
1090 | u32 bw; | |
1a919318 | 1091 | |
4edd5698 | 1092 | for (bw = MHZ_TO_KHZ(20); bw >= min_bw; bw = bw / 2) { |
49172874 | 1093 | reg_rule = freq_reg_info_regd(center_freq, regd, bw); |
4edd5698 MM |
1094 | if (!IS_ERR(reg_rule)) |
1095 | return reg_rule; | |
1096 | } | |
5d885b99 | 1097 | |
4edd5698 MM |
1098 | return reg_rule; |
1099 | } | |
1100 | ||
1101 | const struct ieee80211_reg_rule *freq_reg_info(struct wiphy *wiphy, | |
1102 | u32 center_freq) | |
1103 | { | |
1104 | return __freq_reg_info(wiphy, center_freq, MHZ_TO_KHZ(20)); | |
1fa25e41 | 1105 | } |
4f366c5d | 1106 | EXPORT_SYMBOL(freq_reg_info); |
b2e1b302 | 1107 | |
034c6d6e | 1108 | const char *reg_initiator_name(enum nl80211_reg_initiator initiator) |
926a0a09 LR |
1109 | { |
1110 | switch (initiator) { | |
1111 | case NL80211_REGDOM_SET_BY_CORE: | |
034c6d6e | 1112 | return "core"; |
926a0a09 | 1113 | case NL80211_REGDOM_SET_BY_USER: |
034c6d6e | 1114 | return "user"; |
926a0a09 | 1115 | case NL80211_REGDOM_SET_BY_DRIVER: |
034c6d6e | 1116 | return "driver"; |
926a0a09 | 1117 | case NL80211_REGDOM_SET_BY_COUNTRY_IE: |
034c6d6e | 1118 | return "country IE"; |
926a0a09 LR |
1119 | default: |
1120 | WARN_ON(1); | |
034c6d6e | 1121 | return "bug"; |
926a0a09 LR |
1122 | } |
1123 | } | |
034c6d6e | 1124 | EXPORT_SYMBOL(reg_initiator_name); |
e702d3cf | 1125 | |
1aeb135f MS |
1126 | static uint32_t reg_rule_to_chan_bw_flags(const struct ieee80211_regdomain *regd, |
1127 | const struct ieee80211_reg_rule *reg_rule, | |
1128 | const struct ieee80211_channel *chan) | |
1129 | { | |
1130 | const struct ieee80211_freq_range *freq_range = NULL; | |
1131 | u32 max_bandwidth_khz, bw_flags = 0; | |
1132 | ||
1133 | freq_range = ®_rule->freq_range; | |
1134 | ||
1135 | max_bandwidth_khz = freq_range->max_bandwidth_khz; | |
1136 | /* Check if auto calculation requested */ | |
1137 | if (reg_rule->flags & NL80211_RRF_AUTO_BW) | |
1138 | max_bandwidth_khz = reg_get_max_bandwidth(regd, reg_rule); | |
1139 | ||
1140 | /* If we get a reg_rule we can assume that at least 5Mhz fit */ | |
1141 | if (!reg_does_bw_fit(freq_range, MHZ_TO_KHZ(chan->center_freq), | |
1142 | MHZ_TO_KHZ(10))) | |
1143 | bw_flags |= IEEE80211_CHAN_NO_10MHZ; | |
1144 | if (!reg_does_bw_fit(freq_range, MHZ_TO_KHZ(chan->center_freq), | |
1145 | MHZ_TO_KHZ(20))) | |
1146 | bw_flags |= IEEE80211_CHAN_NO_20MHZ; | |
1147 | ||
1148 | if (max_bandwidth_khz < MHZ_TO_KHZ(10)) | |
1149 | bw_flags |= IEEE80211_CHAN_NO_10MHZ; | |
1150 | if (max_bandwidth_khz < MHZ_TO_KHZ(20)) | |
1151 | bw_flags |= IEEE80211_CHAN_NO_20MHZ; | |
1152 | if (max_bandwidth_khz < MHZ_TO_KHZ(40)) | |
1153 | bw_flags |= IEEE80211_CHAN_NO_HT40; | |
1154 | if (max_bandwidth_khz < MHZ_TO_KHZ(80)) | |
1155 | bw_flags |= IEEE80211_CHAN_NO_80MHZ; | |
1156 | if (max_bandwidth_khz < MHZ_TO_KHZ(160)) | |
1157 | bw_flags |= IEEE80211_CHAN_NO_160MHZ; | |
1158 | return bw_flags; | |
1159 | } | |
1160 | ||
e33e2241 JB |
1161 | /* |
1162 | * Note that right now we assume the desired channel bandwidth | |
1163 | * is always 20 MHz for each individual channel (HT40 uses 20 MHz | |
1164 | * per channel, the primary and the extension channel). | |
038659e7 | 1165 | */ |
7ca43d03 LR |
1166 | static void handle_channel(struct wiphy *wiphy, |
1167 | enum nl80211_reg_initiator initiator, | |
fdc9d7b2 | 1168 | struct ieee80211_channel *chan) |
b2e1b302 | 1169 | { |
038659e7 | 1170 | u32 flags, bw_flags = 0; |
b2e1b302 LR |
1171 | const struct ieee80211_reg_rule *reg_rule = NULL; |
1172 | const struct ieee80211_power_rule *power_rule = NULL; | |
fe33eb39 | 1173 | struct wiphy *request_wiphy = NULL; |
c492db37 | 1174 | struct regulatory_request *lr = get_last_request(); |
97524820 | 1175 | const struct ieee80211_regdomain *regd; |
a92a3ce7 | 1176 | |
c492db37 | 1177 | request_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx); |
a92a3ce7 LR |
1178 | |
1179 | flags = chan->orig_flags; | |
b2e1b302 | 1180 | |
361c9c8b JB |
1181 | reg_rule = freq_reg_info(wiphy, MHZ_TO_KHZ(chan->center_freq)); |
1182 | if (IS_ERR(reg_rule)) { | |
ca4ffe8f LR |
1183 | /* |
1184 | * We will disable all channels that do not match our | |
25985edc | 1185 | * received regulatory rule unless the hint is coming |
ca4ffe8f LR |
1186 | * from a Country IE and the Country IE had no information |
1187 | * about a band. The IEEE 802.11 spec allows for an AP | |
1188 | * to send only a subset of the regulatory rules allowed, | |
1189 | * so an AP in the US that only supports 2.4 GHz may only send | |
1190 | * a country IE with information for the 2.4 GHz band | |
1191 | * while 5 GHz is still supported. | |
1192 | */ | |
1193 | if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE && | |
361c9c8b | 1194 | PTR_ERR(reg_rule) == -ERANGE) |
ca4ffe8f LR |
1195 | return; |
1196 | ||
cc493e4f LR |
1197 | if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER && |
1198 | request_wiphy && request_wiphy == wiphy && | |
a2f73b6c | 1199 | request_wiphy->regulatory_flags & REGULATORY_STRICT_REG) { |
c799ba6e JB |
1200 | pr_debug("Disabling freq %d MHz for good\n", |
1201 | chan->center_freq); | |
cc493e4f LR |
1202 | chan->orig_flags |= IEEE80211_CHAN_DISABLED; |
1203 | chan->flags = chan->orig_flags; | |
1204 | } else { | |
c799ba6e JB |
1205 | pr_debug("Disabling freq %d MHz\n", |
1206 | chan->center_freq); | |
cc493e4f LR |
1207 | chan->flags |= IEEE80211_CHAN_DISABLED; |
1208 | } | |
8318d78a | 1209 | return; |
ca4ffe8f | 1210 | } |
8318d78a | 1211 | |
b0dfd2ea | 1212 | regd = reg_get_regdomain(wiphy); |
e702d3cf | 1213 | |
b2e1b302 | 1214 | power_rule = ®_rule->power_rule; |
1aeb135f | 1215 | bw_flags = reg_rule_to_chan_bw_flags(regd, reg_rule, chan); |
b2e1b302 | 1216 | |
c492db37 | 1217 | if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER && |
806a9e39 | 1218 | request_wiphy && request_wiphy == wiphy && |
a2f73b6c | 1219 | request_wiphy->regulatory_flags & REGULATORY_STRICT_REG) { |
fb1fc7ad | 1220 | /* |
25985edc | 1221 | * This guarantees the driver's requested regulatory domain |
f976376d | 1222 | * will always be used as a base for further regulatory |
fb1fc7ad LR |
1223 | * settings |
1224 | */ | |
f976376d | 1225 | chan->flags = chan->orig_flags = |
038659e7 | 1226 | map_regdom_flags(reg_rule->flags) | bw_flags; |
f976376d LR |
1227 | chan->max_antenna_gain = chan->orig_mag = |
1228 | (int) MBI_TO_DBI(power_rule->max_antenna_gain); | |
279f0f55 | 1229 | chan->max_reg_power = chan->max_power = chan->orig_mpwr = |
f976376d | 1230 | (int) MBM_TO_DBM(power_rule->max_eirp); |
4f267c11 JD |
1231 | |
1232 | if (chan->flags & IEEE80211_CHAN_RADAR) { | |
1233 | chan->dfs_cac_ms = IEEE80211_DFS_MIN_CAC_TIME_MS; | |
1234 | if (reg_rule->dfs_cac_ms) | |
1235 | chan->dfs_cac_ms = reg_rule->dfs_cac_ms; | |
1236 | } | |
1237 | ||
f976376d LR |
1238 | return; |
1239 | } | |
1240 | ||
04f39047 SW |
1241 | chan->dfs_state = NL80211_DFS_USABLE; |
1242 | chan->dfs_state_entered = jiffies; | |
1243 | ||
aa3d7eef | 1244 | chan->beacon_found = false; |
038659e7 | 1245 | chan->flags = flags | bw_flags | map_regdom_flags(reg_rule->flags); |
1a919318 JB |
1246 | chan->max_antenna_gain = |
1247 | min_t(int, chan->orig_mag, | |
1248 | MBI_TO_DBI(power_rule->max_antenna_gain)); | |
eccc068e | 1249 | chan->max_reg_power = (int) MBM_TO_DBM(power_rule->max_eirp); |
089027e5 JD |
1250 | |
1251 | if (chan->flags & IEEE80211_CHAN_RADAR) { | |
1252 | if (reg_rule->dfs_cac_ms) | |
1253 | chan->dfs_cac_ms = reg_rule->dfs_cac_ms; | |
1254 | else | |
1255 | chan->dfs_cac_ms = IEEE80211_DFS_MIN_CAC_TIME_MS; | |
1256 | } | |
1257 | ||
5e31fc08 SG |
1258 | if (chan->orig_mpwr) { |
1259 | /* | |
a09a85a0 LR |
1260 | * Devices that use REGULATORY_COUNTRY_IE_FOLLOW_POWER |
1261 | * will always follow the passed country IE power settings. | |
5e31fc08 SG |
1262 | */ |
1263 | if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE && | |
a09a85a0 | 1264 | wiphy->regulatory_flags & REGULATORY_COUNTRY_IE_FOLLOW_POWER) |
5e31fc08 SG |
1265 | chan->max_power = chan->max_reg_power; |
1266 | else | |
1267 | chan->max_power = min(chan->orig_mpwr, | |
1268 | chan->max_reg_power); | |
1269 | } else | |
1270 | chan->max_power = chan->max_reg_power; | |
8318d78a JB |
1271 | } |
1272 | ||
7ca43d03 | 1273 | static void handle_band(struct wiphy *wiphy, |
fdc9d7b2 JB |
1274 | enum nl80211_reg_initiator initiator, |
1275 | struct ieee80211_supported_band *sband) | |
8318d78a | 1276 | { |
a92a3ce7 | 1277 | unsigned int i; |
a92a3ce7 | 1278 | |
fdc9d7b2 JB |
1279 | if (!sband) |
1280 | return; | |
8318d78a JB |
1281 | |
1282 | for (i = 0; i < sband->n_channels; i++) | |
fdc9d7b2 | 1283 | handle_channel(wiphy, initiator, &sband->channels[i]); |
8318d78a JB |
1284 | } |
1285 | ||
57b5ce07 LR |
1286 | static bool reg_request_cell_base(struct regulatory_request *request) |
1287 | { | |
1288 | if (request->initiator != NL80211_REGDOM_SET_BY_USER) | |
1289 | return false; | |
1a919318 | 1290 | return request->user_reg_hint_type == NL80211_USER_REG_HINT_CELL_BASE; |
57b5ce07 LR |
1291 | } |
1292 | ||
1293 | bool reg_last_request_cell_base(void) | |
1294 | { | |
38fd2143 | 1295 | return reg_request_cell_base(get_last_request()); |
57b5ce07 LR |
1296 | } |
1297 | ||
94fc661f | 1298 | #ifdef CONFIG_CFG80211_REG_CELLULAR_HINTS |
57b5ce07 | 1299 | /* Core specific check */ |
2f92212b JB |
1300 | static enum reg_request_treatment |
1301 | reg_ignore_cell_hint(struct regulatory_request *pending_request) | |
57b5ce07 | 1302 | { |
c492db37 JB |
1303 | struct regulatory_request *lr = get_last_request(); |
1304 | ||
57b5ce07 | 1305 | if (!reg_num_devs_support_basehint) |
2f92212b | 1306 | return REG_REQ_IGNORE; |
57b5ce07 | 1307 | |
c492db37 | 1308 | if (reg_request_cell_base(lr) && |
1a919318 | 1309 | !regdom_changes(pending_request->alpha2)) |
2f92212b | 1310 | return REG_REQ_ALREADY_SET; |
1a919318 | 1311 | |
2f92212b | 1312 | return REG_REQ_OK; |
57b5ce07 LR |
1313 | } |
1314 | ||
1315 | /* Device specific check */ | |
1316 | static bool reg_dev_ignore_cell_hint(struct wiphy *wiphy) | |
1317 | { | |
1a919318 | 1318 | return !(wiphy->features & NL80211_FEATURE_CELL_BASE_REG_HINTS); |
57b5ce07 LR |
1319 | } |
1320 | #else | |
a515de66 JB |
1321 | static enum reg_request_treatment |
1322 | reg_ignore_cell_hint(struct regulatory_request *pending_request) | |
57b5ce07 | 1323 | { |
2f92212b | 1324 | return REG_REQ_IGNORE; |
57b5ce07 | 1325 | } |
1a919318 JB |
1326 | |
1327 | static bool reg_dev_ignore_cell_hint(struct wiphy *wiphy) | |
57b5ce07 LR |
1328 | { |
1329 | return true; | |
1330 | } | |
1331 | #endif | |
1332 | ||
fa1fb9cb LR |
1333 | static bool wiphy_strict_alpha2_regd(struct wiphy *wiphy) |
1334 | { | |
a2f73b6c LR |
1335 | if (wiphy->regulatory_flags & REGULATORY_STRICT_REG && |
1336 | !(wiphy->regulatory_flags & REGULATORY_CUSTOM_REG)) | |
fa1fb9cb LR |
1337 | return true; |
1338 | return false; | |
1339 | } | |
57b5ce07 | 1340 | |
7db90f4a LR |
1341 | static bool ignore_reg_update(struct wiphy *wiphy, |
1342 | enum nl80211_reg_initiator initiator) | |
14b9815a | 1343 | { |
c492db37 JB |
1344 | struct regulatory_request *lr = get_last_request(); |
1345 | ||
b0d7aa59 JD |
1346 | if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) |
1347 | return true; | |
1348 | ||
c492db37 | 1349 | if (!lr) { |
c799ba6e JB |
1350 | pr_debug("Ignoring regulatory request set by %s since last_request is not set\n", |
1351 | reg_initiator_name(initiator)); | |
14b9815a | 1352 | return true; |
926a0a09 LR |
1353 | } |
1354 | ||
7db90f4a | 1355 | if (initiator == NL80211_REGDOM_SET_BY_CORE && |
a2f73b6c | 1356 | wiphy->regulatory_flags & REGULATORY_CUSTOM_REG) { |
c799ba6e JB |
1357 | pr_debug("Ignoring regulatory request set by %s since the driver uses its own custom regulatory domain\n", |
1358 | reg_initiator_name(initiator)); | |
14b9815a | 1359 | return true; |
926a0a09 LR |
1360 | } |
1361 | ||
fb1fc7ad LR |
1362 | /* |
1363 | * wiphy->regd will be set once the device has its own | |
1364 | * desired regulatory domain set | |
1365 | */ | |
fa1fb9cb | 1366 | if (wiphy_strict_alpha2_regd(wiphy) && !wiphy->regd && |
749b527b | 1367 | initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && |
c492db37 | 1368 | !is_world_regdom(lr->alpha2)) { |
c799ba6e JB |
1369 | pr_debug("Ignoring regulatory request set by %s since the driver requires its own regulatory domain to be set first\n", |
1370 | reg_initiator_name(initiator)); | |
14b9815a | 1371 | return true; |
926a0a09 LR |
1372 | } |
1373 | ||
c492db37 | 1374 | if (reg_request_cell_base(lr)) |
57b5ce07 LR |
1375 | return reg_dev_ignore_cell_hint(wiphy); |
1376 | ||
14b9815a LR |
1377 | return false; |
1378 | } | |
1379 | ||
3195e489 LR |
1380 | static bool reg_is_world_roaming(struct wiphy *wiphy) |
1381 | { | |
1382 | const struct ieee80211_regdomain *cr = get_cfg80211_regdom(); | |
1383 | const struct ieee80211_regdomain *wr = get_wiphy_regdom(wiphy); | |
1384 | struct regulatory_request *lr = get_last_request(); | |
1385 | ||
1386 | if (is_world_regdom(cr->alpha2) || (wr && is_world_regdom(wr->alpha2))) | |
1387 | return true; | |
1388 | ||
1389 | if (lr && lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && | |
a2f73b6c | 1390 | wiphy->regulatory_flags & REGULATORY_CUSTOM_REG) |
3195e489 LR |
1391 | return true; |
1392 | ||
1393 | return false; | |
1394 | } | |
1395 | ||
1a919318 | 1396 | static void handle_reg_beacon(struct wiphy *wiphy, unsigned int chan_idx, |
e38f8a7a LR |
1397 | struct reg_beacon *reg_beacon) |
1398 | { | |
e38f8a7a LR |
1399 | struct ieee80211_supported_band *sband; |
1400 | struct ieee80211_channel *chan; | |
6bad8766 LR |
1401 | bool channel_changed = false; |
1402 | struct ieee80211_channel chan_before; | |
e38f8a7a | 1403 | |
e38f8a7a LR |
1404 | sband = wiphy->bands[reg_beacon->chan.band]; |
1405 | chan = &sband->channels[chan_idx]; | |
1406 | ||
1407 | if (likely(chan->center_freq != reg_beacon->chan.center_freq)) | |
1408 | return; | |
1409 | ||
6bad8766 LR |
1410 | if (chan->beacon_found) |
1411 | return; | |
1412 | ||
1413 | chan->beacon_found = true; | |
1414 | ||
0f500a5f LR |
1415 | if (!reg_is_world_roaming(wiphy)) |
1416 | return; | |
1417 | ||
a2f73b6c | 1418 | if (wiphy->regulatory_flags & REGULATORY_DISABLE_BEACON_HINTS) |
37184244 LR |
1419 | return; |
1420 | ||
6bad8766 LR |
1421 | chan_before.center_freq = chan->center_freq; |
1422 | chan_before.flags = chan->flags; | |
1423 | ||
8fe02e16 LR |
1424 | if (chan->flags & IEEE80211_CHAN_NO_IR) { |
1425 | chan->flags &= ~IEEE80211_CHAN_NO_IR; | |
6bad8766 | 1426 | channel_changed = true; |
e38f8a7a LR |
1427 | } |
1428 | ||
6bad8766 LR |
1429 | if (channel_changed) |
1430 | nl80211_send_beacon_hint_event(wiphy, &chan_before, chan); | |
e38f8a7a LR |
1431 | } |
1432 | ||
1433 | /* | |
1434 | * Called when a scan on a wiphy finds a beacon on | |
1435 | * new channel | |
1436 | */ | |
1437 | static void wiphy_update_new_beacon(struct wiphy *wiphy, | |
1438 | struct reg_beacon *reg_beacon) | |
1439 | { | |
1440 | unsigned int i; | |
1441 | struct ieee80211_supported_band *sband; | |
1442 | ||
e38f8a7a LR |
1443 | if (!wiphy->bands[reg_beacon->chan.band]) |
1444 | return; | |
1445 | ||
1446 | sband = wiphy->bands[reg_beacon->chan.band]; | |
1447 | ||
1448 | for (i = 0; i < sband->n_channels; i++) | |
1449 | handle_reg_beacon(wiphy, i, reg_beacon); | |
1450 | } | |
1451 | ||
1452 | /* | |
1453 | * Called upon reg changes or a new wiphy is added | |
1454 | */ | |
1455 | static void wiphy_update_beacon_reg(struct wiphy *wiphy) | |
1456 | { | |
1457 | unsigned int i; | |
1458 | struct ieee80211_supported_band *sband; | |
1459 | struct reg_beacon *reg_beacon; | |
1460 | ||
e38f8a7a LR |
1461 | list_for_each_entry(reg_beacon, ®_beacon_list, list) { |
1462 | if (!wiphy->bands[reg_beacon->chan.band]) | |
1463 | continue; | |
1464 | sband = wiphy->bands[reg_beacon->chan.band]; | |
1465 | for (i = 0; i < sband->n_channels; i++) | |
1466 | handle_reg_beacon(wiphy, i, reg_beacon); | |
1467 | } | |
1468 | } | |
1469 | ||
e38f8a7a LR |
1470 | /* Reap the advantages of previously found beacons */ |
1471 | static void reg_process_beacons(struct wiphy *wiphy) | |
1472 | { | |
b1ed8ddd LR |
1473 | /* |
1474 | * Means we are just firing up cfg80211, so no beacons would | |
1475 | * have been processed yet. | |
1476 | */ | |
1477 | if (!last_request) | |
1478 | return; | |
e38f8a7a LR |
1479 | wiphy_update_beacon_reg(wiphy); |
1480 | } | |
1481 | ||
1a919318 | 1482 | static bool is_ht40_allowed(struct ieee80211_channel *chan) |
038659e7 LR |
1483 | { |
1484 | if (!chan) | |
1a919318 | 1485 | return false; |
038659e7 | 1486 | if (chan->flags & IEEE80211_CHAN_DISABLED) |
1a919318 | 1487 | return false; |
038659e7 | 1488 | /* This would happen when regulatory rules disallow HT40 completely */ |
55b183ad FF |
1489 | if ((chan->flags & IEEE80211_CHAN_NO_HT40) == IEEE80211_CHAN_NO_HT40) |
1490 | return false; | |
1491 | return true; | |
038659e7 LR |
1492 | } |
1493 | ||
1494 | static void reg_process_ht_flags_channel(struct wiphy *wiphy, | |
fdc9d7b2 | 1495 | struct ieee80211_channel *channel) |
038659e7 | 1496 | { |
fdc9d7b2 | 1497 | struct ieee80211_supported_band *sband = wiphy->bands[channel->band]; |
038659e7 LR |
1498 | struct ieee80211_channel *channel_before = NULL, *channel_after = NULL; |
1499 | unsigned int i; | |
1500 | ||
1a919318 | 1501 | if (!is_ht40_allowed(channel)) { |
038659e7 LR |
1502 | channel->flags |= IEEE80211_CHAN_NO_HT40; |
1503 | return; | |
1504 | } | |
1505 | ||
1506 | /* | |
1507 | * We need to ensure the extension channels exist to | |
1508 | * be able to use HT40- or HT40+, this finds them (or not) | |
1509 | */ | |
1510 | for (i = 0; i < sband->n_channels; i++) { | |
1511 | struct ieee80211_channel *c = &sband->channels[i]; | |
1a919318 | 1512 | |
038659e7 LR |
1513 | if (c->center_freq == (channel->center_freq - 20)) |
1514 | channel_before = c; | |
1515 | if (c->center_freq == (channel->center_freq + 20)) | |
1516 | channel_after = c; | |
1517 | } | |
1518 | ||
1519 | /* | |
1520 | * Please note that this assumes target bandwidth is 20 MHz, | |
1521 | * if that ever changes we also need to change the below logic | |
1522 | * to include that as well. | |
1523 | */ | |
1a919318 | 1524 | if (!is_ht40_allowed(channel_before)) |
689da1b3 | 1525 | channel->flags |= IEEE80211_CHAN_NO_HT40MINUS; |
038659e7 | 1526 | else |
689da1b3 | 1527 | channel->flags &= ~IEEE80211_CHAN_NO_HT40MINUS; |
038659e7 | 1528 | |
1a919318 | 1529 | if (!is_ht40_allowed(channel_after)) |
689da1b3 | 1530 | channel->flags |= IEEE80211_CHAN_NO_HT40PLUS; |
038659e7 | 1531 | else |
689da1b3 | 1532 | channel->flags &= ~IEEE80211_CHAN_NO_HT40PLUS; |
038659e7 LR |
1533 | } |
1534 | ||
1535 | static void reg_process_ht_flags_band(struct wiphy *wiphy, | |
fdc9d7b2 | 1536 | struct ieee80211_supported_band *sband) |
038659e7 LR |
1537 | { |
1538 | unsigned int i; | |
038659e7 | 1539 | |
fdc9d7b2 JB |
1540 | if (!sband) |
1541 | return; | |
038659e7 LR |
1542 | |
1543 | for (i = 0; i < sband->n_channels; i++) | |
fdc9d7b2 | 1544 | reg_process_ht_flags_channel(wiphy, &sband->channels[i]); |
038659e7 LR |
1545 | } |
1546 | ||
1547 | static void reg_process_ht_flags(struct wiphy *wiphy) | |
1548 | { | |
57fbcce3 | 1549 | enum nl80211_band band; |
038659e7 LR |
1550 | |
1551 | if (!wiphy) | |
1552 | return; | |
1553 | ||
57fbcce3 | 1554 | for (band = 0; band < NUM_NL80211_BANDS; band++) |
fdc9d7b2 | 1555 | reg_process_ht_flags_band(wiphy, wiphy->bands[band]); |
038659e7 LR |
1556 | } |
1557 | ||
0e3802db LR |
1558 | static void reg_call_notifier(struct wiphy *wiphy, |
1559 | struct regulatory_request *request) | |
1560 | { | |
1561 | if (wiphy->reg_notifier) | |
1562 | wiphy->reg_notifier(wiphy, request); | |
1563 | } | |
1564 | ||
ad932f04 AN |
1565 | static bool reg_wdev_chan_valid(struct wiphy *wiphy, struct wireless_dev *wdev) |
1566 | { | |
ad932f04 AN |
1567 | struct cfg80211_chan_def chandef; |
1568 | struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); | |
20658702 | 1569 | enum nl80211_iftype iftype; |
ad932f04 AN |
1570 | |
1571 | wdev_lock(wdev); | |
20658702 | 1572 | iftype = wdev->iftype; |
ad932f04 | 1573 | |
20658702 | 1574 | /* make sure the interface is active */ |
ad932f04 | 1575 | if (!wdev->netdev || !netif_running(wdev->netdev)) |
20658702 | 1576 | goto wdev_inactive_unlock; |
ad932f04 | 1577 | |
20658702 | 1578 | switch (iftype) { |
ad932f04 AN |
1579 | case NL80211_IFTYPE_AP: |
1580 | case NL80211_IFTYPE_P2P_GO: | |
1581 | if (!wdev->beacon_interval) | |
20658702 AN |
1582 | goto wdev_inactive_unlock; |
1583 | chandef = wdev->chandef; | |
185076d6 AN |
1584 | break; |
1585 | case NL80211_IFTYPE_ADHOC: | |
1586 | if (!wdev->ssid_len) | |
20658702 AN |
1587 | goto wdev_inactive_unlock; |
1588 | chandef = wdev->chandef; | |
ad932f04 AN |
1589 | break; |
1590 | case NL80211_IFTYPE_STATION: | |
1591 | case NL80211_IFTYPE_P2P_CLIENT: | |
ad932f04 AN |
1592 | if (!wdev->current_bss || |
1593 | !wdev->current_bss->pub.channel) | |
20658702 | 1594 | goto wdev_inactive_unlock; |
ad932f04 | 1595 | |
20658702 AN |
1596 | if (!rdev->ops->get_channel || |
1597 | rdev_get_channel(rdev, wdev, &chandef)) | |
1598 | cfg80211_chandef_create(&chandef, | |
1599 | wdev->current_bss->pub.channel, | |
1600 | NL80211_CHAN_NO_HT); | |
ad932f04 AN |
1601 | break; |
1602 | case NL80211_IFTYPE_MONITOR: | |
1603 | case NL80211_IFTYPE_AP_VLAN: | |
1604 | case NL80211_IFTYPE_P2P_DEVICE: | |
1605 | /* no enforcement required */ | |
1606 | break; | |
1607 | default: | |
1608 | /* others not implemented for now */ | |
1609 | WARN_ON(1); | |
1610 | break; | |
1611 | } | |
1612 | ||
ad932f04 | 1613 | wdev_unlock(wdev); |
20658702 AN |
1614 | |
1615 | switch (iftype) { | |
1616 | case NL80211_IFTYPE_AP: | |
1617 | case NL80211_IFTYPE_P2P_GO: | |
1618 | case NL80211_IFTYPE_ADHOC: | |
923b352f | 1619 | return cfg80211_reg_can_beacon_relax(wiphy, &chandef, iftype); |
20658702 AN |
1620 | case NL80211_IFTYPE_STATION: |
1621 | case NL80211_IFTYPE_P2P_CLIENT: | |
1622 | return cfg80211_chandef_usable(wiphy, &chandef, | |
1623 | IEEE80211_CHAN_DISABLED); | |
1624 | default: | |
1625 | break; | |
1626 | } | |
1627 | ||
1628 | return true; | |
1629 | ||
1630 | wdev_inactive_unlock: | |
1631 | wdev_unlock(wdev); | |
1632 | return true; | |
ad932f04 AN |
1633 | } |
1634 | ||
1635 | static void reg_leave_invalid_chans(struct wiphy *wiphy) | |
1636 | { | |
1637 | struct wireless_dev *wdev; | |
1638 | struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); | |
1639 | ||
1640 | ASSERT_RTNL(); | |
1641 | ||
53873f13 | 1642 | list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) |
ad932f04 AN |
1643 | if (!reg_wdev_chan_valid(wiphy, wdev)) |
1644 | cfg80211_leave(rdev, wdev); | |
1645 | } | |
1646 | ||
1647 | static void reg_check_chans_work(struct work_struct *work) | |
1648 | { | |
1649 | struct cfg80211_registered_device *rdev; | |
1650 | ||
c799ba6e | 1651 | pr_debug("Verifying active interfaces after reg change\n"); |
ad932f04 AN |
1652 | rtnl_lock(); |
1653 | ||
1654 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) | |
1655 | if (!(rdev->wiphy.regulatory_flags & | |
1656 | REGULATORY_IGNORE_STALE_KICKOFF)) | |
1657 | reg_leave_invalid_chans(&rdev->wiphy); | |
1658 | ||
1659 | rtnl_unlock(); | |
1660 | } | |
1661 | ||
1662 | static void reg_check_channels(void) | |
1663 | { | |
1664 | /* | |
1665 | * Give usermode a chance to do something nicer (move to another | |
1666 | * channel, orderly disconnection), before forcing a disconnection. | |
1667 | */ | |
1668 | mod_delayed_work(system_power_efficient_wq, | |
1669 | ®_check_chans, | |
1670 | msecs_to_jiffies(REG_ENFORCE_GRACE_MS)); | |
1671 | } | |
1672 | ||
eac03e38 SN |
1673 | static void wiphy_update_regulatory(struct wiphy *wiphy, |
1674 | enum nl80211_reg_initiator initiator) | |
b2e1b302 | 1675 | { |
57fbcce3 | 1676 | enum nl80211_band band; |
c492db37 | 1677 | struct regulatory_request *lr = get_last_request(); |
eac03e38 | 1678 | |
0e3802db LR |
1679 | if (ignore_reg_update(wiphy, initiator)) { |
1680 | /* | |
1681 | * Regulatory updates set by CORE are ignored for custom | |
1682 | * regulatory cards. Let us notify the changes to the driver, | |
1683 | * as some drivers used this to restore its orig_* reg domain. | |
1684 | */ | |
1685 | if (initiator == NL80211_REGDOM_SET_BY_CORE && | |
a2f73b6c | 1686 | wiphy->regulatory_flags & REGULATORY_CUSTOM_REG) |
0e3802db | 1687 | reg_call_notifier(wiphy, lr); |
a203c2aa | 1688 | return; |
0e3802db | 1689 | } |
a203c2aa | 1690 | |
c492db37 | 1691 | lr->dfs_region = get_cfg80211_regdom()->dfs_region; |
b68e6b3b | 1692 | |
57fbcce3 | 1693 | for (band = 0; band < NUM_NL80211_BANDS; band++) |
fdc9d7b2 | 1694 | handle_band(wiphy, initiator, wiphy->bands[band]); |
a203c2aa | 1695 | |
e38f8a7a | 1696 | reg_process_beacons(wiphy); |
038659e7 | 1697 | reg_process_ht_flags(wiphy); |
0e3802db | 1698 | reg_call_notifier(wiphy, lr); |
b2e1b302 LR |
1699 | } |
1700 | ||
d7549cbb SN |
1701 | static void update_all_wiphy_regulatory(enum nl80211_reg_initiator initiator) |
1702 | { | |
1703 | struct cfg80211_registered_device *rdev; | |
4a38994f | 1704 | struct wiphy *wiphy; |
d7549cbb | 1705 | |
5fe231e8 | 1706 | ASSERT_RTNL(); |
458f4f9e | 1707 | |
4a38994f RM |
1708 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) { |
1709 | wiphy = &rdev->wiphy; | |
1710 | wiphy_update_regulatory(wiphy, initiator); | |
4a38994f | 1711 | } |
ad932f04 AN |
1712 | |
1713 | reg_check_channels(); | |
d7549cbb SN |
1714 | } |
1715 | ||
1fa25e41 | 1716 | static void handle_channel_custom(struct wiphy *wiphy, |
fdc9d7b2 | 1717 | struct ieee80211_channel *chan, |
1fa25e41 LR |
1718 | const struct ieee80211_regdomain *regd) |
1719 | { | |
038659e7 | 1720 | u32 bw_flags = 0; |
1fa25e41 LR |
1721 | const struct ieee80211_reg_rule *reg_rule = NULL; |
1722 | const struct ieee80211_power_rule *power_rule = NULL; | |
4edd5698 | 1723 | u32 bw; |
ac46d48e | 1724 | |
4edd5698 | 1725 | for (bw = MHZ_TO_KHZ(20); bw >= MHZ_TO_KHZ(5); bw = bw / 2) { |
49172874 | 1726 | reg_rule = freq_reg_info_regd(MHZ_TO_KHZ(chan->center_freq), |
4edd5698 MM |
1727 | regd, bw); |
1728 | if (!IS_ERR(reg_rule)) | |
1729 | break; | |
1730 | } | |
1fa25e41 | 1731 | |
361c9c8b | 1732 | if (IS_ERR(reg_rule)) { |
c799ba6e JB |
1733 | pr_debug("Disabling freq %d MHz as custom regd has no rule that fits it\n", |
1734 | chan->center_freq); | |
db8dfee5 AN |
1735 | if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) { |
1736 | chan->flags |= IEEE80211_CHAN_DISABLED; | |
1737 | } else { | |
1738 | chan->orig_flags |= IEEE80211_CHAN_DISABLED; | |
1739 | chan->flags = chan->orig_flags; | |
1740 | } | |
1fa25e41 LR |
1741 | return; |
1742 | } | |
1743 | ||
1744 | power_rule = ®_rule->power_rule; | |
1aeb135f | 1745 | bw_flags = reg_rule_to_chan_bw_flags(regd, reg_rule, chan); |
1fa25e41 | 1746 | |
2e18b38f | 1747 | chan->dfs_state_entered = jiffies; |
c7ab5081 AN |
1748 | chan->dfs_state = NL80211_DFS_USABLE; |
1749 | ||
1750 | chan->beacon_found = false; | |
db8dfee5 AN |
1751 | |
1752 | if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) | |
1753 | chan->flags = chan->orig_flags | bw_flags | | |
1754 | map_regdom_flags(reg_rule->flags); | |
1755 | else | |
1756 | chan->flags |= map_regdom_flags(reg_rule->flags) | bw_flags; | |
1757 | ||
1fa25e41 | 1758 | chan->max_antenna_gain = (int) MBI_TO_DBI(power_rule->max_antenna_gain); |
279f0f55 FF |
1759 | chan->max_reg_power = chan->max_power = |
1760 | (int) MBM_TO_DBM(power_rule->max_eirp); | |
2e18b38f AN |
1761 | |
1762 | if (chan->flags & IEEE80211_CHAN_RADAR) { | |
1763 | if (reg_rule->dfs_cac_ms) | |
1764 | chan->dfs_cac_ms = reg_rule->dfs_cac_ms; | |
1765 | else | |
1766 | chan->dfs_cac_ms = IEEE80211_DFS_MIN_CAC_TIME_MS; | |
1767 | } | |
1768 | ||
1769 | chan->max_power = chan->max_reg_power; | |
1fa25e41 LR |
1770 | } |
1771 | ||
fdc9d7b2 JB |
1772 | static void handle_band_custom(struct wiphy *wiphy, |
1773 | struct ieee80211_supported_band *sband, | |
1fa25e41 LR |
1774 | const struct ieee80211_regdomain *regd) |
1775 | { | |
1776 | unsigned int i; | |
1fa25e41 | 1777 | |
fdc9d7b2 JB |
1778 | if (!sband) |
1779 | return; | |
1fa25e41 LR |
1780 | |
1781 | for (i = 0; i < sband->n_channels; i++) | |
fdc9d7b2 | 1782 | handle_channel_custom(wiphy, &sband->channels[i], regd); |
1fa25e41 LR |
1783 | } |
1784 | ||
1785 | /* Used by drivers prior to wiphy registration */ | |
1786 | void wiphy_apply_custom_regulatory(struct wiphy *wiphy, | |
1787 | const struct ieee80211_regdomain *regd) | |
1788 | { | |
57fbcce3 | 1789 | enum nl80211_band band; |
bbcf3f02 | 1790 | unsigned int bands_set = 0; |
ac46d48e | 1791 | |
a2f73b6c LR |
1792 | WARN(!(wiphy->regulatory_flags & REGULATORY_CUSTOM_REG), |
1793 | "wiphy should have REGULATORY_CUSTOM_REG\n"); | |
1794 | wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG; | |
222ea581 | 1795 | |
57fbcce3 | 1796 | for (band = 0; band < NUM_NL80211_BANDS; band++) { |
bbcf3f02 LR |
1797 | if (!wiphy->bands[band]) |
1798 | continue; | |
fdc9d7b2 | 1799 | handle_band_custom(wiphy, wiphy->bands[band], regd); |
bbcf3f02 | 1800 | bands_set++; |
b2e1b302 | 1801 | } |
bbcf3f02 LR |
1802 | |
1803 | /* | |
1804 | * no point in calling this if it won't have any effect | |
1a919318 | 1805 | * on your device's supported bands. |
bbcf3f02 LR |
1806 | */ |
1807 | WARN_ON(!bands_set); | |
b2e1b302 | 1808 | } |
1fa25e41 LR |
1809 | EXPORT_SYMBOL(wiphy_apply_custom_regulatory); |
1810 | ||
b2e253cf LR |
1811 | static void reg_set_request_processed(void) |
1812 | { | |
1813 | bool need_more_processing = false; | |
c492db37 | 1814 | struct regulatory_request *lr = get_last_request(); |
b2e253cf | 1815 | |
c492db37 | 1816 | lr->processed = true; |
b2e253cf LR |
1817 | |
1818 | spin_lock(®_requests_lock); | |
1819 | if (!list_empty(®_requests_list)) | |
1820 | need_more_processing = true; | |
1821 | spin_unlock(®_requests_lock); | |
1822 | ||
b6863036 | 1823 | cancel_crda_timeout(); |
a90c7a31 | 1824 | |
b2e253cf LR |
1825 | if (need_more_processing) |
1826 | schedule_work(®_work); | |
1827 | } | |
1828 | ||
b3eb7f3f LR |
1829 | /** |
1830 | * reg_process_hint_core - process core regulatory requests | |
1831 | * @pending_request: a pending core regulatory request | |
1832 | * | |
1833 | * The wireless subsystem can use this function to process | |
1834 | * a regulatory request issued by the regulatory core. | |
b3eb7f3f | 1835 | */ |
d34265a3 JB |
1836 | static enum reg_request_treatment |
1837 | reg_process_hint_core(struct regulatory_request *core_request) | |
b3eb7f3f | 1838 | { |
cecbb069 | 1839 | if (reg_query_database(core_request)) { |
25b20dbd JB |
1840 | core_request->intersect = false; |
1841 | core_request->processed = false; | |
1842 | reg_update_last_request(core_request); | |
d34265a3 | 1843 | return REG_REQ_OK; |
25b20dbd | 1844 | } |
d34265a3 JB |
1845 | |
1846 | return REG_REQ_IGNORE; | |
b3eb7f3f LR |
1847 | } |
1848 | ||
0d97a619 LR |
1849 | static enum reg_request_treatment |
1850 | __reg_process_hint_user(struct regulatory_request *user_request) | |
1851 | { | |
1852 | struct regulatory_request *lr = get_last_request(); | |
1853 | ||
1854 | if (reg_request_cell_base(user_request)) | |
1855 | return reg_ignore_cell_hint(user_request); | |
1856 | ||
1857 | if (reg_request_cell_base(lr)) | |
1858 | return REG_REQ_IGNORE; | |
1859 | ||
1860 | if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) | |
1861 | return REG_REQ_INTERSECT; | |
1862 | /* | |
1863 | * If the user knows better the user should set the regdom | |
1864 | * to their country before the IE is picked up | |
1865 | */ | |
1866 | if (lr->initiator == NL80211_REGDOM_SET_BY_USER && | |
1867 | lr->intersect) | |
1868 | return REG_REQ_IGNORE; | |
1869 | /* | |
1870 | * Process user requests only after previous user/driver/core | |
1871 | * requests have been processed | |
1872 | */ | |
1873 | if ((lr->initiator == NL80211_REGDOM_SET_BY_CORE || | |
1874 | lr->initiator == NL80211_REGDOM_SET_BY_DRIVER || | |
1875 | lr->initiator == NL80211_REGDOM_SET_BY_USER) && | |
1876 | regdom_changes(lr->alpha2)) | |
1877 | return REG_REQ_IGNORE; | |
1878 | ||
1879 | if (!regdom_changes(user_request->alpha2)) | |
1880 | return REG_REQ_ALREADY_SET; | |
1881 | ||
1882 | return REG_REQ_OK; | |
1883 | } | |
1884 | ||
1885 | /** | |
1886 | * reg_process_hint_user - process user regulatory requests | |
1887 | * @user_request: a pending user regulatory request | |
1888 | * | |
1889 | * The wireless subsystem can use this function to process | |
1890 | * a regulatory request initiated by userspace. | |
0d97a619 | 1891 | */ |
d34265a3 JB |
1892 | static enum reg_request_treatment |
1893 | reg_process_hint_user(struct regulatory_request *user_request) | |
0d97a619 LR |
1894 | { |
1895 | enum reg_request_treatment treatment; | |
0d97a619 LR |
1896 | |
1897 | treatment = __reg_process_hint_user(user_request); | |
1898 | if (treatment == REG_REQ_IGNORE || | |
d34265a3 JB |
1899 | treatment == REG_REQ_ALREADY_SET) |
1900 | return REG_REQ_IGNORE; | |
0d97a619 | 1901 | |
0d97a619 LR |
1902 | user_request->intersect = treatment == REG_REQ_INTERSECT; |
1903 | user_request->processed = false; | |
5ad6ef5e | 1904 | |
cecbb069 | 1905 | if (reg_query_database(user_request)) { |
25b20dbd JB |
1906 | reg_update_last_request(user_request); |
1907 | user_alpha2[0] = user_request->alpha2[0]; | |
1908 | user_alpha2[1] = user_request->alpha2[1]; | |
d34265a3 | 1909 | return REG_REQ_OK; |
25b20dbd | 1910 | } |
d34265a3 JB |
1911 | |
1912 | return REG_REQ_IGNORE; | |
0d97a619 LR |
1913 | } |
1914 | ||
21636c7f LR |
1915 | static enum reg_request_treatment |
1916 | __reg_process_hint_driver(struct regulatory_request *driver_request) | |
1917 | { | |
1918 | struct regulatory_request *lr = get_last_request(); | |
1919 | ||
1920 | if (lr->initiator == NL80211_REGDOM_SET_BY_CORE) { | |
1921 | if (regdom_changes(driver_request->alpha2)) | |
1922 | return REG_REQ_OK; | |
1923 | return REG_REQ_ALREADY_SET; | |
1924 | } | |
1925 | ||
1926 | /* | |
1927 | * This would happen if you unplug and plug your card | |
1928 | * back in or if you add a new device for which the previously | |
1929 | * loaded card also agrees on the regulatory domain. | |
1930 | */ | |
1931 | if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER && | |
1932 | !regdom_changes(driver_request->alpha2)) | |
1933 | return REG_REQ_ALREADY_SET; | |
1934 | ||
1935 | return REG_REQ_INTERSECT; | |
1936 | } | |
1937 | ||
1938 | /** | |
1939 | * reg_process_hint_driver - process driver regulatory requests | |
1940 | * @driver_request: a pending driver regulatory request | |
1941 | * | |
1942 | * The wireless subsystem can use this function to process | |
1943 | * a regulatory request issued by an 802.11 driver. | |
1944 | * | |
1945 | * Returns one of the different reg request treatment values. | |
1946 | */ | |
1947 | static enum reg_request_treatment | |
1948 | reg_process_hint_driver(struct wiphy *wiphy, | |
1949 | struct regulatory_request *driver_request) | |
1950 | { | |
34f05f54 | 1951 | const struct ieee80211_regdomain *regd, *tmp; |
21636c7f | 1952 | enum reg_request_treatment treatment; |
21636c7f LR |
1953 | |
1954 | treatment = __reg_process_hint_driver(driver_request); | |
1955 | ||
1956 | switch (treatment) { | |
1957 | case REG_REQ_OK: | |
1958 | break; | |
1959 | case REG_REQ_IGNORE: | |
d34265a3 | 1960 | return REG_REQ_IGNORE; |
21636c7f | 1961 | case REG_REQ_INTERSECT: |
21636c7f LR |
1962 | case REG_REQ_ALREADY_SET: |
1963 | regd = reg_copy_regd(get_cfg80211_regdom()); | |
d34265a3 JB |
1964 | if (IS_ERR(regd)) |
1965 | return REG_REQ_IGNORE; | |
34f05f54 AN |
1966 | |
1967 | tmp = get_wiphy_regdom(wiphy); | |
21636c7f | 1968 | rcu_assign_pointer(wiphy->regd, regd); |
34f05f54 | 1969 | rcu_free_regdom(tmp); |
21636c7f LR |
1970 | } |
1971 | ||
21636c7f LR |
1972 | |
1973 | driver_request->intersect = treatment == REG_REQ_INTERSECT; | |
1974 | driver_request->processed = false; | |
5ad6ef5e | 1975 | |
21636c7f LR |
1976 | /* |
1977 | * Since CRDA will not be called in this case as we already | |
1978 | * have applied the requested regulatory domain before we just | |
1979 | * inform userspace we have processed the request | |
1980 | */ | |
1981 | if (treatment == REG_REQ_ALREADY_SET) { | |
1982 | nl80211_send_reg_change_event(driver_request); | |
25b20dbd | 1983 | reg_update_last_request(driver_request); |
21636c7f | 1984 | reg_set_request_processed(); |
480908a7 | 1985 | return REG_REQ_ALREADY_SET; |
21636c7f LR |
1986 | } |
1987 | ||
d34265a3 | 1988 | if (reg_query_database(driver_request)) { |
25b20dbd | 1989 | reg_update_last_request(driver_request); |
d34265a3 JB |
1990 | return REG_REQ_OK; |
1991 | } | |
25b20dbd | 1992 | |
d34265a3 | 1993 | return REG_REQ_IGNORE; |
21636c7f LR |
1994 | } |
1995 | ||
b23e7a9e LR |
1996 | static enum reg_request_treatment |
1997 | __reg_process_hint_country_ie(struct wiphy *wiphy, | |
1998 | struct regulatory_request *country_ie_request) | |
1999 | { | |
2000 | struct wiphy *last_wiphy = NULL; | |
2001 | struct regulatory_request *lr = get_last_request(); | |
2002 | ||
2003 | if (reg_request_cell_base(lr)) { | |
2004 | /* Trust a Cell base station over the AP's country IE */ | |
2005 | if (regdom_changes(country_ie_request->alpha2)) | |
2006 | return REG_REQ_IGNORE; | |
2007 | return REG_REQ_ALREADY_SET; | |
2a901468 LR |
2008 | } else { |
2009 | if (wiphy->regulatory_flags & REGULATORY_COUNTRY_IE_IGNORE) | |
2010 | return REG_REQ_IGNORE; | |
b23e7a9e LR |
2011 | } |
2012 | ||
b23e7a9e LR |
2013 | if (unlikely(!is_an_alpha2(country_ie_request->alpha2))) |
2014 | return -EINVAL; | |
2f1c6c57 LR |
2015 | |
2016 | if (lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE) | |
2017 | return REG_REQ_OK; | |
2018 | ||
2019 | last_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx); | |
2020 | ||
2021 | if (last_wiphy != wiphy) { | |
b23e7a9e | 2022 | /* |
2f1c6c57 LR |
2023 | * Two cards with two APs claiming different |
2024 | * Country IE alpha2s. We could | |
2025 | * intersect them, but that seems unlikely | |
2026 | * to be correct. Reject second one for now. | |
b23e7a9e | 2027 | */ |
2f1c6c57 LR |
2028 | if (regdom_changes(country_ie_request->alpha2)) |
2029 | return REG_REQ_IGNORE; | |
b23e7a9e LR |
2030 | return REG_REQ_ALREADY_SET; |
2031 | } | |
70dcec5a EG |
2032 | |
2033 | if (regdom_changes(country_ie_request->alpha2)) | |
2f1c6c57 LR |
2034 | return REG_REQ_OK; |
2035 | return REG_REQ_ALREADY_SET; | |
b23e7a9e LR |
2036 | } |
2037 | ||
d1c96a9a | 2038 | /** |
b23e7a9e LR |
2039 | * reg_process_hint_country_ie - process regulatory requests from country IEs |
2040 | * @country_ie_request: a regulatory request from a country IE | |
d1c96a9a | 2041 | * |
b23e7a9e LR |
2042 | * The wireless subsystem can use this function to process |
2043 | * a regulatory request issued by a country Information Element. | |
d1c96a9a | 2044 | * |
2f92212b | 2045 | * Returns one of the different reg request treatment values. |
d1c96a9a | 2046 | */ |
2f92212b | 2047 | static enum reg_request_treatment |
b23e7a9e LR |
2048 | reg_process_hint_country_ie(struct wiphy *wiphy, |
2049 | struct regulatory_request *country_ie_request) | |
b2e1b302 | 2050 | { |
2f92212b | 2051 | enum reg_request_treatment treatment; |
761cf7ec | 2052 | |
b23e7a9e | 2053 | treatment = __reg_process_hint_country_ie(wiphy, country_ie_request); |
9c96477d | 2054 | |
2f92212b | 2055 | switch (treatment) { |
2f92212b JB |
2056 | case REG_REQ_OK: |
2057 | break; | |
b23e7a9e | 2058 | case REG_REQ_IGNORE: |
d34265a3 | 2059 | return REG_REQ_IGNORE; |
b23e7a9e | 2060 | case REG_REQ_ALREADY_SET: |
c888393b | 2061 | reg_free_request(country_ie_request); |
480908a7 | 2062 | return REG_REQ_ALREADY_SET; |
b23e7a9e | 2063 | case REG_REQ_INTERSECT: |
fb1fc7ad | 2064 | /* |
b23e7a9e LR |
2065 | * This doesn't happen yet, not sure we |
2066 | * ever want to support it for this case. | |
fb1fc7ad | 2067 | */ |
b23e7a9e | 2068 | WARN_ONCE(1, "Unexpected intersection for country IEs"); |
d34265a3 | 2069 | return REG_REQ_IGNORE; |
3e0c3ff3 | 2070 | } |
b2e1b302 | 2071 | |
b23e7a9e LR |
2072 | country_ie_request->intersect = false; |
2073 | country_ie_request->processed = false; | |
5ad6ef5e | 2074 | |
d34265a3 | 2075 | if (reg_query_database(country_ie_request)) { |
25b20dbd | 2076 | reg_update_last_request(country_ie_request); |
d34265a3 JB |
2077 | return REG_REQ_OK; |
2078 | } | |
3e0c3ff3 | 2079 | |
d34265a3 | 2080 | return REG_REQ_IGNORE; |
b2e1b302 LR |
2081 | } |
2082 | ||
30a548c7 | 2083 | /* This processes *all* regulatory hints */ |
1daa37c7 | 2084 | static void reg_process_hint(struct regulatory_request *reg_request) |
fe33eb39 | 2085 | { |
fe33eb39 | 2086 | struct wiphy *wiphy = NULL; |
b3eb7f3f | 2087 | enum reg_request_treatment treatment; |
fe33eb39 | 2088 | |
f4173766 | 2089 | if (reg_request->wiphy_idx != WIPHY_IDX_INVALID) |
fe33eb39 LR |
2090 | wiphy = wiphy_idx_to_wiphy(reg_request->wiphy_idx); |
2091 | ||
b3eb7f3f LR |
2092 | switch (reg_request->initiator) { |
2093 | case NL80211_REGDOM_SET_BY_CORE: | |
d34265a3 JB |
2094 | treatment = reg_process_hint_core(reg_request); |
2095 | break; | |
b3eb7f3f | 2096 | case NL80211_REGDOM_SET_BY_USER: |
d34265a3 JB |
2097 | treatment = reg_process_hint_user(reg_request); |
2098 | break; | |
b3eb7f3f | 2099 | case NL80211_REGDOM_SET_BY_DRIVER: |
772f0389 IP |
2100 | if (!wiphy) |
2101 | goto out_free; | |
21636c7f LR |
2102 | treatment = reg_process_hint_driver(wiphy, reg_request); |
2103 | break; | |
b3eb7f3f | 2104 | case NL80211_REGDOM_SET_BY_COUNTRY_IE: |
772f0389 IP |
2105 | if (!wiphy) |
2106 | goto out_free; | |
b23e7a9e | 2107 | treatment = reg_process_hint_country_ie(wiphy, reg_request); |
b3eb7f3f LR |
2108 | break; |
2109 | default: | |
2110 | WARN(1, "invalid initiator %d\n", reg_request->initiator); | |
772f0389 | 2111 | goto out_free; |
b3eb7f3f LR |
2112 | } |
2113 | ||
d34265a3 JB |
2114 | if (treatment == REG_REQ_IGNORE) |
2115 | goto out_free; | |
2116 | ||
480908a7 JB |
2117 | WARN(treatment != REG_REQ_OK && treatment != REG_REQ_ALREADY_SET, |
2118 | "unexpected treatment value %d\n", treatment); | |
2119 | ||
841b351c JL |
2120 | /* This is required so that the orig_* parameters are saved. |
2121 | * NOTE: treatment must be set for any case that reaches here! | |
2122 | */ | |
b23e7a9e | 2123 | if (treatment == REG_REQ_ALREADY_SET && wiphy && |
ad932f04 | 2124 | wiphy->regulatory_flags & REGULATORY_STRICT_REG) { |
b23e7a9e | 2125 | wiphy_update_regulatory(wiphy, reg_request->initiator); |
ad932f04 AN |
2126 | reg_check_channels(); |
2127 | } | |
772f0389 IP |
2128 | |
2129 | return; | |
2130 | ||
2131 | out_free: | |
c888393b | 2132 | reg_free_request(reg_request); |
fe33eb39 LR |
2133 | } |
2134 | ||
ef51fb1d AN |
2135 | static bool reg_only_self_managed_wiphys(void) |
2136 | { | |
2137 | struct cfg80211_registered_device *rdev; | |
2138 | struct wiphy *wiphy; | |
2139 | bool self_managed_found = false; | |
2140 | ||
2141 | ASSERT_RTNL(); | |
2142 | ||
2143 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) { | |
2144 | wiphy = &rdev->wiphy; | |
2145 | if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) | |
2146 | self_managed_found = true; | |
2147 | else | |
2148 | return false; | |
2149 | } | |
2150 | ||
2151 | /* make sure at least one self-managed wiphy exists */ | |
2152 | return self_managed_found; | |
2153 | } | |
2154 | ||
b2e253cf LR |
2155 | /* |
2156 | * Processes regulatory hints, this is all the NL80211_REGDOM_SET_BY_* | |
2157 | * Regulatory hints come on a first come first serve basis and we | |
2158 | * must process each one atomically. | |
2159 | */ | |
fe33eb39 | 2160 | static void reg_process_pending_hints(void) |
b0e2880b | 2161 | { |
c492db37 | 2162 | struct regulatory_request *reg_request, *lr; |
fe33eb39 | 2163 | |
c492db37 | 2164 | lr = get_last_request(); |
b0e2880b | 2165 | |
b2e253cf | 2166 | /* When last_request->processed becomes true this will be rescheduled */ |
c492db37 | 2167 | if (lr && !lr->processed) { |
96cce12f | 2168 | reg_process_hint(lr); |
5fe231e8 | 2169 | return; |
b2e253cf LR |
2170 | } |
2171 | ||
fe33eb39 | 2172 | spin_lock(®_requests_lock); |
fe33eb39 | 2173 | |
b2e253cf | 2174 | if (list_empty(®_requests_list)) { |
d951c1dd | 2175 | spin_unlock(®_requests_lock); |
5fe231e8 | 2176 | return; |
fe33eb39 | 2177 | } |
b2e253cf LR |
2178 | |
2179 | reg_request = list_first_entry(®_requests_list, | |
2180 | struct regulatory_request, | |
2181 | list); | |
2182 | list_del_init(®_request->list); | |
2183 | ||
fe33eb39 | 2184 | spin_unlock(®_requests_lock); |
b0e2880b | 2185 | |
ef51fb1d AN |
2186 | if (reg_only_self_managed_wiphys()) { |
2187 | reg_free_request(reg_request); | |
2188 | return; | |
2189 | } | |
2190 | ||
1daa37c7 | 2191 | reg_process_hint(reg_request); |
2e54a689 B |
2192 | |
2193 | lr = get_last_request(); | |
2194 | ||
2195 | spin_lock(®_requests_lock); | |
2196 | if (!list_empty(®_requests_list) && lr && lr->processed) | |
2197 | schedule_work(®_work); | |
2198 | spin_unlock(®_requests_lock); | |
fe33eb39 LR |
2199 | } |
2200 | ||
e38f8a7a LR |
2201 | /* Processes beacon hints -- this has nothing to do with country IEs */ |
2202 | static void reg_process_pending_beacon_hints(void) | |
2203 | { | |
79c97e97 | 2204 | struct cfg80211_registered_device *rdev; |
e38f8a7a LR |
2205 | struct reg_beacon *pending_beacon, *tmp; |
2206 | ||
e38f8a7a LR |
2207 | /* This goes through the _pending_ beacon list */ |
2208 | spin_lock_bh(®_pending_beacons_lock); | |
2209 | ||
e38f8a7a LR |
2210 | list_for_each_entry_safe(pending_beacon, tmp, |
2211 | ®_pending_beacons, list) { | |
e38f8a7a LR |
2212 | list_del_init(&pending_beacon->list); |
2213 | ||
2214 | /* Applies the beacon hint to current wiphys */ | |
79c97e97 JB |
2215 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) |
2216 | wiphy_update_new_beacon(&rdev->wiphy, pending_beacon); | |
e38f8a7a LR |
2217 | |
2218 | /* Remembers the beacon hint for new wiphys or reg changes */ | |
2219 | list_add_tail(&pending_beacon->list, ®_beacon_list); | |
2220 | } | |
2221 | ||
2222 | spin_unlock_bh(®_pending_beacons_lock); | |
e38f8a7a LR |
2223 | } |
2224 | ||
b0d7aa59 JD |
2225 | static void reg_process_self_managed_hints(void) |
2226 | { | |
2227 | struct cfg80211_registered_device *rdev; | |
2228 | struct wiphy *wiphy; | |
2229 | const struct ieee80211_regdomain *tmp; | |
2230 | const struct ieee80211_regdomain *regd; | |
57fbcce3 | 2231 | enum nl80211_band band; |
b0d7aa59 JD |
2232 | struct regulatory_request request = {}; |
2233 | ||
2234 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) { | |
2235 | wiphy = &rdev->wiphy; | |
2236 | ||
2237 | spin_lock(®_requests_lock); | |
2238 | regd = rdev->requested_regd; | |
2239 | rdev->requested_regd = NULL; | |
2240 | spin_unlock(®_requests_lock); | |
2241 | ||
2242 | if (regd == NULL) | |
2243 | continue; | |
2244 | ||
2245 | tmp = get_wiphy_regdom(wiphy); | |
2246 | rcu_assign_pointer(wiphy->regd, regd); | |
2247 | rcu_free_regdom(tmp); | |
2248 | ||
57fbcce3 | 2249 | for (band = 0; band < NUM_NL80211_BANDS; band++) |
b0d7aa59 JD |
2250 | handle_band_custom(wiphy, wiphy->bands[band], regd); |
2251 | ||
2252 | reg_process_ht_flags(wiphy); | |
2253 | ||
2254 | request.wiphy_idx = get_wiphy_idx(wiphy); | |
2255 | request.alpha2[0] = regd->alpha2[0]; | |
2256 | request.alpha2[1] = regd->alpha2[1]; | |
2257 | request.initiator = NL80211_REGDOM_SET_BY_DRIVER; | |
2258 | ||
2259 | nl80211_send_wiphy_reg_change_event(&request); | |
2260 | } | |
2261 | ||
2262 | reg_check_channels(); | |
2263 | } | |
2264 | ||
fe33eb39 LR |
2265 | static void reg_todo(struct work_struct *work) |
2266 | { | |
5fe231e8 | 2267 | rtnl_lock(); |
fe33eb39 | 2268 | reg_process_pending_hints(); |
e38f8a7a | 2269 | reg_process_pending_beacon_hints(); |
b0d7aa59 | 2270 | reg_process_self_managed_hints(); |
5fe231e8 | 2271 | rtnl_unlock(); |
fe33eb39 LR |
2272 | } |
2273 | ||
fe33eb39 LR |
2274 | static void queue_regulatory_request(struct regulatory_request *request) |
2275 | { | |
d4f2c881 JB |
2276 | request->alpha2[0] = toupper(request->alpha2[0]); |
2277 | request->alpha2[1] = toupper(request->alpha2[1]); | |
c61029c7 | 2278 | |
fe33eb39 LR |
2279 | spin_lock(®_requests_lock); |
2280 | list_add_tail(&request->list, ®_requests_list); | |
2281 | spin_unlock(®_requests_lock); | |
2282 | ||
2283 | schedule_work(®_work); | |
2284 | } | |
2285 | ||
09d989d1 LR |
2286 | /* |
2287 | * Core regulatory hint -- happens during cfg80211_init() | |
2288 | * and when we restore regulatory settings. | |
2289 | */ | |
ba25c141 LR |
2290 | static int regulatory_hint_core(const char *alpha2) |
2291 | { | |
2292 | struct regulatory_request *request; | |
2293 | ||
1a919318 | 2294 | request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); |
ba25c141 LR |
2295 | if (!request) |
2296 | return -ENOMEM; | |
2297 | ||
2298 | request->alpha2[0] = alpha2[0]; | |
2299 | request->alpha2[1] = alpha2[1]; | |
7db90f4a | 2300 | request->initiator = NL80211_REGDOM_SET_BY_CORE; |
ba25c141 | 2301 | |
31e99729 | 2302 | queue_regulatory_request(request); |
5078b2e3 | 2303 | |
fe33eb39 | 2304 | return 0; |
ba25c141 LR |
2305 | } |
2306 | ||
fe33eb39 | 2307 | /* User hints */ |
57b5ce07 LR |
2308 | int regulatory_hint_user(const char *alpha2, |
2309 | enum nl80211_user_reg_hint_type user_reg_hint_type) | |
b2e1b302 | 2310 | { |
fe33eb39 LR |
2311 | struct regulatory_request *request; |
2312 | ||
fdc9d7b2 JB |
2313 | if (WARN_ON(!alpha2)) |
2314 | return -EINVAL; | |
b2e1b302 | 2315 | |
fe33eb39 LR |
2316 | request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); |
2317 | if (!request) | |
2318 | return -ENOMEM; | |
2319 | ||
f4173766 | 2320 | request->wiphy_idx = WIPHY_IDX_INVALID; |
fe33eb39 LR |
2321 | request->alpha2[0] = alpha2[0]; |
2322 | request->alpha2[1] = alpha2[1]; | |
e12822e1 | 2323 | request->initiator = NL80211_REGDOM_SET_BY_USER; |
57b5ce07 | 2324 | request->user_reg_hint_type = user_reg_hint_type; |
fe33eb39 | 2325 | |
c37722bd | 2326 | /* Allow calling CRDA again */ |
b6863036 | 2327 | reset_crda_timeouts(); |
c37722bd | 2328 | |
fe33eb39 LR |
2329 | queue_regulatory_request(request); |
2330 | ||
2331 | return 0; | |
2332 | } | |
2333 | ||
05050753 | 2334 | int regulatory_hint_indoor(bool is_indoor, u32 portid) |
52616f2b | 2335 | { |
05050753 | 2336 | spin_lock(®_indoor_lock); |
52616f2b | 2337 | |
05050753 I |
2338 | /* It is possible that more than one user space process is trying to |
2339 | * configure the indoor setting. To handle such cases, clear the indoor | |
2340 | * setting in case that some process does not think that the device | |
2341 | * is operating in an indoor environment. In addition, if a user space | |
2342 | * process indicates that it is controlling the indoor setting, save its | |
2343 | * portid, i.e., make it the owner. | |
2344 | */ | |
2345 | reg_is_indoor = is_indoor; | |
2346 | if (reg_is_indoor) { | |
2347 | if (!reg_is_indoor_portid) | |
2348 | reg_is_indoor_portid = portid; | |
2349 | } else { | |
2350 | reg_is_indoor_portid = 0; | |
2351 | } | |
52616f2b | 2352 | |
05050753 | 2353 | spin_unlock(®_indoor_lock); |
52616f2b | 2354 | |
05050753 I |
2355 | if (!is_indoor) |
2356 | reg_check_channels(); | |
52616f2b IP |
2357 | |
2358 | return 0; | |
2359 | } | |
2360 | ||
05050753 I |
2361 | void regulatory_netlink_notify(u32 portid) |
2362 | { | |
2363 | spin_lock(®_indoor_lock); | |
2364 | ||
2365 | if (reg_is_indoor_portid != portid) { | |
2366 | spin_unlock(®_indoor_lock); | |
2367 | return; | |
2368 | } | |
2369 | ||
2370 | reg_is_indoor = false; | |
2371 | reg_is_indoor_portid = 0; | |
2372 | ||
2373 | spin_unlock(®_indoor_lock); | |
2374 | ||
2375 | reg_check_channels(); | |
2376 | } | |
2377 | ||
fe33eb39 LR |
2378 | /* Driver hints */ |
2379 | int regulatory_hint(struct wiphy *wiphy, const char *alpha2) | |
2380 | { | |
2381 | struct regulatory_request *request; | |
2382 | ||
fdc9d7b2 JB |
2383 | if (WARN_ON(!alpha2 || !wiphy)) |
2384 | return -EINVAL; | |
fe33eb39 | 2385 | |
4f7b9140 LR |
2386 | wiphy->regulatory_flags &= ~REGULATORY_CUSTOM_REG; |
2387 | ||
fe33eb39 LR |
2388 | request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); |
2389 | if (!request) | |
2390 | return -ENOMEM; | |
2391 | ||
2392 | request->wiphy_idx = get_wiphy_idx(wiphy); | |
2393 | ||
fe33eb39 LR |
2394 | request->alpha2[0] = alpha2[0]; |
2395 | request->alpha2[1] = alpha2[1]; | |
7db90f4a | 2396 | request->initiator = NL80211_REGDOM_SET_BY_DRIVER; |
fe33eb39 | 2397 | |
c37722bd | 2398 | /* Allow calling CRDA again */ |
b6863036 | 2399 | reset_crda_timeouts(); |
c37722bd | 2400 | |
fe33eb39 LR |
2401 | queue_regulatory_request(request); |
2402 | ||
2403 | return 0; | |
b2e1b302 LR |
2404 | } |
2405 | EXPORT_SYMBOL(regulatory_hint); | |
2406 | ||
57fbcce3 | 2407 | void regulatory_hint_country_ie(struct wiphy *wiphy, enum nl80211_band band, |
789fd033 | 2408 | const u8 *country_ie, u8 country_ie_len) |
3f2355cb | 2409 | { |
3f2355cb | 2410 | char alpha2[2]; |
3f2355cb | 2411 | enum environment_cap env = ENVIRON_ANY; |
db2424c5 | 2412 | struct regulatory_request *request = NULL, *lr; |
d335fe63 | 2413 | |
3f2355cb LR |
2414 | /* IE len must be evenly divisible by 2 */ |
2415 | if (country_ie_len & 0x01) | |
db2424c5 | 2416 | return; |
3f2355cb LR |
2417 | |
2418 | if (country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN) | |
db2424c5 JB |
2419 | return; |
2420 | ||
2421 | request = kzalloc(sizeof(*request), GFP_KERNEL); | |
2422 | if (!request) | |
2423 | return; | |
3f2355cb | 2424 | |
3f2355cb LR |
2425 | alpha2[0] = country_ie[0]; |
2426 | alpha2[1] = country_ie[1]; | |
2427 | ||
2428 | if (country_ie[2] == 'I') | |
2429 | env = ENVIRON_INDOOR; | |
2430 | else if (country_ie[2] == 'O') | |
2431 | env = ENVIRON_OUTDOOR; | |
2432 | ||
db2424c5 JB |
2433 | rcu_read_lock(); |
2434 | lr = get_last_request(); | |
2435 | ||
2436 | if (unlikely(!lr)) | |
2437 | goto out; | |
2438 | ||
fb1fc7ad | 2439 | /* |
8b19e6ca | 2440 | * We will run this only upon a successful connection on cfg80211. |
4b44c8bc | 2441 | * We leave conflict resolution to the workqueue, where can hold |
5fe231e8 | 2442 | * the RTNL. |
fb1fc7ad | 2443 | */ |
c492db37 JB |
2444 | if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE && |
2445 | lr->wiphy_idx != WIPHY_IDX_INVALID) | |
4b44c8bc | 2446 | goto out; |
3f2355cb | 2447 | |
fe33eb39 | 2448 | request->wiphy_idx = get_wiphy_idx(wiphy); |
4f366c5d JL |
2449 | request->alpha2[0] = alpha2[0]; |
2450 | request->alpha2[1] = alpha2[1]; | |
7db90f4a | 2451 | request->initiator = NL80211_REGDOM_SET_BY_COUNTRY_IE; |
fe33eb39 LR |
2452 | request->country_ie_env = env; |
2453 | ||
c37722bd | 2454 | /* Allow calling CRDA again */ |
b6863036 | 2455 | reset_crda_timeouts(); |
c37722bd | 2456 | |
fe33eb39 | 2457 | queue_regulatory_request(request); |
db2424c5 | 2458 | request = NULL; |
3f2355cb | 2459 | out: |
db2424c5 JB |
2460 | kfree(request); |
2461 | rcu_read_unlock(); | |
3f2355cb | 2462 | } |
b2e1b302 | 2463 | |
09d989d1 LR |
2464 | static void restore_alpha2(char *alpha2, bool reset_user) |
2465 | { | |
2466 | /* indicates there is no alpha2 to consider for restoration */ | |
2467 | alpha2[0] = '9'; | |
2468 | alpha2[1] = '7'; | |
2469 | ||
2470 | /* The user setting has precedence over the module parameter */ | |
2471 | if (is_user_regdom_saved()) { | |
2472 | /* Unless we're asked to ignore it and reset it */ | |
2473 | if (reset_user) { | |
c799ba6e | 2474 | pr_debug("Restoring regulatory settings including user preference\n"); |
09d989d1 LR |
2475 | user_alpha2[0] = '9'; |
2476 | user_alpha2[1] = '7'; | |
2477 | ||
2478 | /* | |
2479 | * If we're ignoring user settings, we still need to | |
2480 | * check the module parameter to ensure we put things | |
2481 | * back as they were for a full restore. | |
2482 | */ | |
2483 | if (!is_world_regdom(ieee80211_regdom)) { | |
c799ba6e JB |
2484 | pr_debug("Keeping preference on module parameter ieee80211_regdom: %c%c\n", |
2485 | ieee80211_regdom[0], ieee80211_regdom[1]); | |
09d989d1 LR |
2486 | alpha2[0] = ieee80211_regdom[0]; |
2487 | alpha2[1] = ieee80211_regdom[1]; | |
2488 | } | |
2489 | } else { | |
c799ba6e JB |
2490 | pr_debug("Restoring regulatory settings while preserving user preference for: %c%c\n", |
2491 | user_alpha2[0], user_alpha2[1]); | |
09d989d1 LR |
2492 | alpha2[0] = user_alpha2[0]; |
2493 | alpha2[1] = user_alpha2[1]; | |
2494 | } | |
2495 | } else if (!is_world_regdom(ieee80211_regdom)) { | |
c799ba6e JB |
2496 | pr_debug("Keeping preference on module parameter ieee80211_regdom: %c%c\n", |
2497 | ieee80211_regdom[0], ieee80211_regdom[1]); | |
09d989d1 LR |
2498 | alpha2[0] = ieee80211_regdom[0]; |
2499 | alpha2[1] = ieee80211_regdom[1]; | |
2500 | } else | |
c799ba6e | 2501 | pr_debug("Restoring regulatory settings\n"); |
09d989d1 LR |
2502 | } |
2503 | ||
5ce543d1 RM |
2504 | static void restore_custom_reg_settings(struct wiphy *wiphy) |
2505 | { | |
2506 | struct ieee80211_supported_band *sband; | |
57fbcce3 | 2507 | enum nl80211_band band; |
5ce543d1 RM |
2508 | struct ieee80211_channel *chan; |
2509 | int i; | |
2510 | ||
57fbcce3 | 2511 | for (band = 0; band < NUM_NL80211_BANDS; band++) { |
5ce543d1 RM |
2512 | sband = wiphy->bands[band]; |
2513 | if (!sband) | |
2514 | continue; | |
2515 | for (i = 0; i < sband->n_channels; i++) { | |
2516 | chan = &sband->channels[i]; | |
2517 | chan->flags = chan->orig_flags; | |
2518 | chan->max_antenna_gain = chan->orig_mag; | |
2519 | chan->max_power = chan->orig_mpwr; | |
899852af | 2520 | chan->beacon_found = false; |
5ce543d1 RM |
2521 | } |
2522 | } | |
2523 | } | |
2524 | ||
09d989d1 LR |
2525 | /* |
2526 | * Restoring regulatory settings involves ingoring any | |
2527 | * possibly stale country IE information and user regulatory | |
2528 | * settings if so desired, this includes any beacon hints | |
2529 | * learned as we could have traveled outside to another country | |
2530 | * after disconnection. To restore regulatory settings we do | |
2531 | * exactly what we did at bootup: | |
2532 | * | |
2533 | * - send a core regulatory hint | |
2534 | * - send a user regulatory hint if applicable | |
2535 | * | |
2536 | * Device drivers that send a regulatory hint for a specific country | |
2537 | * keep their own regulatory domain on wiphy->regd so that does does | |
2538 | * not need to be remembered. | |
2539 | */ | |
2540 | static void restore_regulatory_settings(bool reset_user) | |
2541 | { | |
2542 | char alpha2[2]; | |
cee0bec5 | 2543 | char world_alpha2[2]; |
09d989d1 | 2544 | struct reg_beacon *reg_beacon, *btmp; |
14609555 | 2545 | LIST_HEAD(tmp_reg_req_list); |
5ce543d1 | 2546 | struct cfg80211_registered_device *rdev; |
09d989d1 | 2547 | |
5fe231e8 JB |
2548 | ASSERT_RTNL(); |
2549 | ||
05050753 I |
2550 | /* |
2551 | * Clear the indoor setting in case that it is not controlled by user | |
2552 | * space, as otherwise there is no guarantee that the device is still | |
2553 | * operating in an indoor environment. | |
2554 | */ | |
2555 | spin_lock(®_indoor_lock); | |
2556 | if (reg_is_indoor && !reg_is_indoor_portid) { | |
2557 | reg_is_indoor = false; | |
2558 | reg_check_channels(); | |
2559 | } | |
2560 | spin_unlock(®_indoor_lock); | |
52616f2b | 2561 | |
2d319867 | 2562 | reset_regdomains(true, &world_regdom); |
09d989d1 LR |
2563 | restore_alpha2(alpha2, reset_user); |
2564 | ||
14609555 LR |
2565 | /* |
2566 | * If there's any pending requests we simply | |
2567 | * stash them to a temporary pending queue and | |
2568 | * add then after we've restored regulatory | |
2569 | * settings. | |
2570 | */ | |
2571 | spin_lock(®_requests_lock); | |
eeca9fce | 2572 | list_splice_tail_init(®_requests_list, &tmp_reg_req_list); |
14609555 LR |
2573 | spin_unlock(®_requests_lock); |
2574 | ||
09d989d1 LR |
2575 | /* Clear beacon hints */ |
2576 | spin_lock_bh(®_pending_beacons_lock); | |
fea9bced JB |
2577 | list_for_each_entry_safe(reg_beacon, btmp, ®_pending_beacons, list) { |
2578 | list_del(®_beacon->list); | |
2579 | kfree(reg_beacon); | |
09d989d1 LR |
2580 | } |
2581 | spin_unlock_bh(®_pending_beacons_lock); | |
2582 | ||
fea9bced JB |
2583 | list_for_each_entry_safe(reg_beacon, btmp, ®_beacon_list, list) { |
2584 | list_del(®_beacon->list); | |
2585 | kfree(reg_beacon); | |
09d989d1 LR |
2586 | } |
2587 | ||
2588 | /* First restore to the basic regulatory settings */ | |
379b82f4 JB |
2589 | world_alpha2[0] = cfg80211_world_regdom->alpha2[0]; |
2590 | world_alpha2[1] = cfg80211_world_regdom->alpha2[1]; | |
09d989d1 | 2591 | |
5ce543d1 | 2592 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) { |
b0d7aa59 JD |
2593 | if (rdev->wiphy.regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) |
2594 | continue; | |
a2f73b6c | 2595 | if (rdev->wiphy.regulatory_flags & REGULATORY_CUSTOM_REG) |
5ce543d1 RM |
2596 | restore_custom_reg_settings(&rdev->wiphy); |
2597 | } | |
2598 | ||
cee0bec5 | 2599 | regulatory_hint_core(world_alpha2); |
09d989d1 LR |
2600 | |
2601 | /* | |
2602 | * This restores the ieee80211_regdom module parameter | |
2603 | * preference or the last user requested regulatory | |
2604 | * settings, user regulatory settings takes precedence. | |
2605 | */ | |
2606 | if (is_an_alpha2(alpha2)) | |
549cc1c5 | 2607 | regulatory_hint_user(alpha2, NL80211_USER_REG_HINT_USER); |
09d989d1 | 2608 | |
14609555 | 2609 | spin_lock(®_requests_lock); |
11cff96c | 2610 | list_splice_tail_init(&tmp_reg_req_list, ®_requests_list); |
14609555 LR |
2611 | spin_unlock(®_requests_lock); |
2612 | ||
c799ba6e | 2613 | pr_debug("Kicking the queue\n"); |
14609555 LR |
2614 | |
2615 | schedule_work(®_work); | |
2616 | } | |
09d989d1 LR |
2617 | |
2618 | void regulatory_hint_disconnect(void) | |
2619 | { | |
c799ba6e | 2620 | pr_debug("All devices are disconnected, going to restore regulatory settings\n"); |
09d989d1 LR |
2621 | restore_regulatory_settings(false); |
2622 | } | |
2623 | ||
e38f8a7a LR |
2624 | static bool freq_is_chan_12_13_14(u16 freq) |
2625 | { | |
57fbcce3 JB |
2626 | if (freq == ieee80211_channel_to_frequency(12, NL80211_BAND_2GHZ) || |
2627 | freq == ieee80211_channel_to_frequency(13, NL80211_BAND_2GHZ) || | |
2628 | freq == ieee80211_channel_to_frequency(14, NL80211_BAND_2GHZ)) | |
e38f8a7a LR |
2629 | return true; |
2630 | return false; | |
2631 | } | |
2632 | ||
3ebfa6e7 LR |
2633 | static bool pending_reg_beacon(struct ieee80211_channel *beacon_chan) |
2634 | { | |
2635 | struct reg_beacon *pending_beacon; | |
2636 | ||
2637 | list_for_each_entry(pending_beacon, ®_pending_beacons, list) | |
2638 | if (beacon_chan->center_freq == | |
2639 | pending_beacon->chan.center_freq) | |
2640 | return true; | |
2641 | return false; | |
2642 | } | |
2643 | ||
e38f8a7a LR |
2644 | int regulatory_hint_found_beacon(struct wiphy *wiphy, |
2645 | struct ieee80211_channel *beacon_chan, | |
2646 | gfp_t gfp) | |
2647 | { | |
2648 | struct reg_beacon *reg_beacon; | |
3ebfa6e7 | 2649 | bool processing; |
e38f8a7a | 2650 | |
1a919318 JB |
2651 | if (beacon_chan->beacon_found || |
2652 | beacon_chan->flags & IEEE80211_CHAN_RADAR || | |
57fbcce3 | 2653 | (beacon_chan->band == NL80211_BAND_2GHZ && |
1a919318 | 2654 | !freq_is_chan_12_13_14(beacon_chan->center_freq))) |
e38f8a7a LR |
2655 | return 0; |
2656 | ||
3ebfa6e7 LR |
2657 | spin_lock_bh(®_pending_beacons_lock); |
2658 | processing = pending_reg_beacon(beacon_chan); | |
2659 | spin_unlock_bh(®_pending_beacons_lock); | |
2660 | ||
2661 | if (processing) | |
e38f8a7a LR |
2662 | return 0; |
2663 | ||
2664 | reg_beacon = kzalloc(sizeof(struct reg_beacon), gfp); | |
2665 | if (!reg_beacon) | |
2666 | return -ENOMEM; | |
2667 | ||
c799ba6e JB |
2668 | pr_debug("Found new beacon on frequency: %d MHz (Ch %d) on %s\n", |
2669 | beacon_chan->center_freq, | |
2670 | ieee80211_frequency_to_channel(beacon_chan->center_freq), | |
2671 | wiphy_name(wiphy)); | |
4113f751 | 2672 | |
e38f8a7a | 2673 | memcpy(®_beacon->chan, beacon_chan, |
1a919318 | 2674 | sizeof(struct ieee80211_channel)); |
e38f8a7a LR |
2675 | |
2676 | /* | |
2677 | * Since we can be called from BH or and non-BH context | |
2678 | * we must use spin_lock_bh() | |
2679 | */ | |
2680 | spin_lock_bh(®_pending_beacons_lock); | |
2681 | list_add_tail(®_beacon->list, ®_pending_beacons); | |
2682 | spin_unlock_bh(®_pending_beacons_lock); | |
2683 | ||
2684 | schedule_work(®_work); | |
2685 | ||
2686 | return 0; | |
2687 | } | |
2688 | ||
a3d2eaf0 | 2689 | static void print_rd_rules(const struct ieee80211_regdomain *rd) |
b2e1b302 LR |
2690 | { |
2691 | unsigned int i; | |
a3d2eaf0 JB |
2692 | const struct ieee80211_reg_rule *reg_rule = NULL; |
2693 | const struct ieee80211_freq_range *freq_range = NULL; | |
2694 | const struct ieee80211_power_rule *power_rule = NULL; | |
089027e5 | 2695 | char bw[32], cac_time[32]; |
b2e1b302 | 2696 | |
94c4fd64 | 2697 | pr_debug(" (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp), (dfs_cac_time)\n"); |
b2e1b302 LR |
2698 | |
2699 | for (i = 0; i < rd->n_reg_rules; i++) { | |
2700 | reg_rule = &rd->reg_rules[i]; | |
2701 | freq_range = ®_rule->freq_range; | |
2702 | power_rule = ®_rule->power_rule; | |
2703 | ||
b0dfd2ea JD |
2704 | if (reg_rule->flags & NL80211_RRF_AUTO_BW) |
2705 | snprintf(bw, sizeof(bw), "%d KHz, %d KHz AUTO", | |
2706 | freq_range->max_bandwidth_khz, | |
97524820 JD |
2707 | reg_get_max_bandwidth(rd, reg_rule)); |
2708 | else | |
b0dfd2ea | 2709 | snprintf(bw, sizeof(bw), "%d KHz", |
97524820 JD |
2710 | freq_range->max_bandwidth_khz); |
2711 | ||
089027e5 JD |
2712 | if (reg_rule->flags & NL80211_RRF_DFS) |
2713 | scnprintf(cac_time, sizeof(cac_time), "%u s", | |
2714 | reg_rule->dfs_cac_ms/1000); | |
2715 | else | |
2716 | scnprintf(cac_time, sizeof(cac_time), "N/A"); | |
2717 | ||
2718 | ||
fb1fc7ad LR |
2719 | /* |
2720 | * There may not be documentation for max antenna gain | |
2721 | * in certain regions | |
2722 | */ | |
b2e1b302 | 2723 | if (power_rule->max_antenna_gain) |
94c4fd64 | 2724 | pr_debug(" (%d KHz - %d KHz @ %s), (%d mBi, %d mBm), (%s)\n", |
b2e1b302 LR |
2725 | freq_range->start_freq_khz, |
2726 | freq_range->end_freq_khz, | |
97524820 | 2727 | bw, |
b2e1b302 | 2728 | power_rule->max_antenna_gain, |
089027e5 JD |
2729 | power_rule->max_eirp, |
2730 | cac_time); | |
b2e1b302 | 2731 | else |
94c4fd64 | 2732 | pr_debug(" (%d KHz - %d KHz @ %s), (N/A, %d mBm), (%s)\n", |
b2e1b302 LR |
2733 | freq_range->start_freq_khz, |
2734 | freq_range->end_freq_khz, | |
97524820 | 2735 | bw, |
089027e5 JD |
2736 | power_rule->max_eirp, |
2737 | cac_time); | |
b2e1b302 LR |
2738 | } |
2739 | } | |
2740 | ||
4c7d3982 | 2741 | bool reg_supported_dfs_region(enum nl80211_dfs_regions dfs_region) |
8b60b078 LR |
2742 | { |
2743 | switch (dfs_region) { | |
2744 | case NL80211_DFS_UNSET: | |
2745 | case NL80211_DFS_FCC: | |
2746 | case NL80211_DFS_ETSI: | |
2747 | case NL80211_DFS_JP: | |
2748 | return true; | |
2749 | default: | |
c799ba6e | 2750 | pr_debug("Ignoring uknown DFS master region: %d\n", dfs_region); |
8b60b078 LR |
2751 | return false; |
2752 | } | |
2753 | } | |
2754 | ||
a3d2eaf0 | 2755 | static void print_regdomain(const struct ieee80211_regdomain *rd) |
b2e1b302 | 2756 | { |
c492db37 | 2757 | struct regulatory_request *lr = get_last_request(); |
b2e1b302 | 2758 | |
3f2355cb | 2759 | if (is_intersected_alpha2(rd->alpha2)) { |
c492db37 | 2760 | if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) { |
79c97e97 | 2761 | struct cfg80211_registered_device *rdev; |
c492db37 | 2762 | rdev = cfg80211_rdev_by_wiphy_idx(lr->wiphy_idx); |
79c97e97 | 2763 | if (rdev) { |
94c4fd64 | 2764 | pr_debug("Current regulatory domain updated by AP to: %c%c\n", |
79c97e97 JB |
2765 | rdev->country_ie_alpha2[0], |
2766 | rdev->country_ie_alpha2[1]); | |
3f2355cb | 2767 | } else |
94c4fd64 | 2768 | pr_debug("Current regulatory domain intersected:\n"); |
3f2355cb | 2769 | } else |
94c4fd64 | 2770 | pr_debug("Current regulatory domain intersected:\n"); |
1a919318 | 2771 | } else if (is_world_regdom(rd->alpha2)) { |
94c4fd64 | 2772 | pr_debug("World regulatory domain updated:\n"); |
1a919318 | 2773 | } else { |
b2e1b302 | 2774 | if (is_unknown_alpha2(rd->alpha2)) |
94c4fd64 | 2775 | pr_debug("Regulatory domain changed to driver built-in settings (unknown country)\n"); |
57b5ce07 | 2776 | else { |
c492db37 | 2777 | if (reg_request_cell_base(lr)) |
94c4fd64 | 2778 | pr_debug("Regulatory domain changed to country: %c%c by Cell Station\n", |
57b5ce07 LR |
2779 | rd->alpha2[0], rd->alpha2[1]); |
2780 | else | |
94c4fd64 | 2781 | pr_debug("Regulatory domain changed to country: %c%c\n", |
57b5ce07 LR |
2782 | rd->alpha2[0], rd->alpha2[1]); |
2783 | } | |
b2e1b302 | 2784 | } |
1a919318 | 2785 | |
94c4fd64 | 2786 | pr_debug(" DFS Master region: %s", reg_dfs_region_str(rd->dfs_region)); |
b2e1b302 LR |
2787 | print_rd_rules(rd); |
2788 | } | |
2789 | ||
2df78167 | 2790 | static void print_regdomain_info(const struct ieee80211_regdomain *rd) |
b2e1b302 | 2791 | { |
94c4fd64 | 2792 | pr_debug("Regulatory domain: %c%c\n", rd->alpha2[0], rd->alpha2[1]); |
b2e1b302 LR |
2793 | print_rd_rules(rd); |
2794 | } | |
2795 | ||
3b9e5aca LR |
2796 | static int reg_set_rd_core(const struct ieee80211_regdomain *rd) |
2797 | { | |
2798 | if (!is_world_regdom(rd->alpha2)) | |
2799 | return -EINVAL; | |
2800 | update_world_regdomain(rd); | |
2801 | return 0; | |
2802 | } | |
2803 | ||
84721d44 LR |
2804 | static int reg_set_rd_user(const struct ieee80211_regdomain *rd, |
2805 | struct regulatory_request *user_request) | |
2806 | { | |
2807 | const struct ieee80211_regdomain *intersected_rd = NULL; | |
2808 | ||
84721d44 LR |
2809 | if (!regdom_changes(rd->alpha2)) |
2810 | return -EALREADY; | |
2811 | ||
2812 | if (!is_valid_rd(rd)) { | |
94c4fd64 DY |
2813 | pr_err("Invalid regulatory domain detected: %c%c\n", |
2814 | rd->alpha2[0], rd->alpha2[1]); | |
84721d44 LR |
2815 | print_regdomain_info(rd); |
2816 | return -EINVAL; | |
2817 | } | |
2818 | ||
2819 | if (!user_request->intersect) { | |
2820 | reset_regdomains(false, rd); | |
2821 | return 0; | |
2822 | } | |
2823 | ||
2824 | intersected_rd = regdom_intersect(rd, get_cfg80211_regdom()); | |
2825 | if (!intersected_rd) | |
2826 | return -EINVAL; | |
2827 | ||
2828 | kfree(rd); | |
2829 | rd = NULL; | |
2830 | reset_regdomains(false, intersected_rd); | |
2831 | ||
2832 | return 0; | |
2833 | } | |
2834 | ||
f5fe3247 LR |
2835 | static int reg_set_rd_driver(const struct ieee80211_regdomain *rd, |
2836 | struct regulatory_request *driver_request) | |
b2e1b302 | 2837 | { |
e9763c3c | 2838 | const struct ieee80211_regdomain *regd; |
9c96477d | 2839 | const struct ieee80211_regdomain *intersected_rd = NULL; |
f5fe3247 | 2840 | const struct ieee80211_regdomain *tmp; |
806a9e39 | 2841 | struct wiphy *request_wiphy; |
6913b49a | 2842 | |
f5fe3247 | 2843 | if (is_world_regdom(rd->alpha2)) |
b2e1b302 LR |
2844 | return -EINVAL; |
2845 | ||
f5fe3247 LR |
2846 | if (!regdom_changes(rd->alpha2)) |
2847 | return -EALREADY; | |
b2e1b302 | 2848 | |
8375af3b | 2849 | if (!is_valid_rd(rd)) { |
94c4fd64 DY |
2850 | pr_err("Invalid regulatory domain detected: %c%c\n", |
2851 | rd->alpha2[0], rd->alpha2[1]); | |
8375af3b LR |
2852 | print_regdomain_info(rd); |
2853 | return -EINVAL; | |
b2e1b302 LR |
2854 | } |
2855 | ||
f5fe3247 | 2856 | request_wiphy = wiphy_idx_to_wiphy(driver_request->wiphy_idx); |
922ec58c | 2857 | if (!request_wiphy) |
de3584bd | 2858 | return -ENODEV; |
806a9e39 | 2859 | |
f5fe3247 | 2860 | if (!driver_request->intersect) { |
558f6d32 LR |
2861 | if (request_wiphy->regd) |
2862 | return -EALREADY; | |
3e0c3ff3 | 2863 | |
e9763c3c JB |
2864 | regd = reg_copy_regd(rd); |
2865 | if (IS_ERR(regd)) | |
2866 | return PTR_ERR(regd); | |
3e0c3ff3 | 2867 | |
458f4f9e | 2868 | rcu_assign_pointer(request_wiphy->regd, regd); |
379b82f4 | 2869 | reset_regdomains(false, rd); |
b8295acd LR |
2870 | return 0; |
2871 | } | |
2872 | ||
f5fe3247 LR |
2873 | intersected_rd = regdom_intersect(rd, get_cfg80211_regdom()); |
2874 | if (!intersected_rd) | |
2875 | return -EINVAL; | |
b8295acd | 2876 | |
f5fe3247 LR |
2877 | /* |
2878 | * We can trash what CRDA provided now. | |
2879 | * However if a driver requested this specific regulatory | |
2880 | * domain we keep it for its private use | |
2881 | */ | |
2882 | tmp = get_wiphy_regdom(request_wiphy); | |
2883 | rcu_assign_pointer(request_wiphy->regd, rd); | |
2884 | rcu_free_regdom(tmp); | |
b8295acd | 2885 | |
f5fe3247 | 2886 | rd = NULL; |
b7566fc3 | 2887 | |
f5fe3247 | 2888 | reset_regdomains(false, intersected_rd); |
3e0c3ff3 | 2889 | |
f5fe3247 LR |
2890 | return 0; |
2891 | } | |
2892 | ||
01992406 LR |
2893 | static int reg_set_rd_country_ie(const struct ieee80211_regdomain *rd, |
2894 | struct regulatory_request *country_ie_request) | |
f5fe3247 LR |
2895 | { |
2896 | struct wiphy *request_wiphy; | |
b8295acd | 2897 | |
f5fe3247 LR |
2898 | if (!is_alpha2_set(rd->alpha2) && !is_an_alpha2(rd->alpha2) && |
2899 | !is_unknown_alpha2(rd->alpha2)) | |
2900 | return -EINVAL; | |
b8295acd | 2901 | |
f5fe3247 LR |
2902 | /* |
2903 | * Lets only bother proceeding on the same alpha2 if the current | |
2904 | * rd is non static (it means CRDA was present and was used last) | |
2905 | * and the pending request came in from a country IE | |
2906 | */ | |
2907 | ||
2908 | if (!is_valid_rd(rd)) { | |
94c4fd64 DY |
2909 | pr_err("Invalid regulatory domain detected: %c%c\n", |
2910 | rd->alpha2[0], rd->alpha2[1]); | |
f5fe3247 LR |
2911 | print_regdomain_info(rd); |
2912 | return -EINVAL; | |
9c96477d LR |
2913 | } |
2914 | ||
01992406 | 2915 | request_wiphy = wiphy_idx_to_wiphy(country_ie_request->wiphy_idx); |
922ec58c | 2916 | if (!request_wiphy) |
f5fe3247 | 2917 | return -ENODEV; |
b2e1b302 | 2918 | |
01992406 | 2919 | if (country_ie_request->intersect) |
f5fe3247 LR |
2920 | return -EINVAL; |
2921 | ||
2922 | reset_regdomains(false, rd); | |
2923 | return 0; | |
2924 | } | |
b2e1b302 | 2925 | |
fb1fc7ad LR |
2926 | /* |
2927 | * Use this call to set the current regulatory domain. Conflicts with | |
b2e1b302 | 2928 | * multiple drivers can be ironed out later. Caller must've already |
458f4f9e | 2929 | * kmalloc'd the rd structure. |
fb1fc7ad | 2930 | */ |
c37722bd I |
2931 | int set_regdom(const struct ieee80211_regdomain *rd, |
2932 | enum ieee80211_regd_source regd_src) | |
b2e1b302 | 2933 | { |
c492db37 | 2934 | struct regulatory_request *lr; |
092008ab | 2935 | bool user_reset = false; |
b2e1b302 LR |
2936 | int r; |
2937 | ||
3b9e5aca LR |
2938 | if (!reg_is_valid_request(rd->alpha2)) { |
2939 | kfree(rd); | |
2940 | return -EINVAL; | |
2941 | } | |
2942 | ||
c37722bd | 2943 | if (regd_src == REGD_SOURCE_CRDA) |
b6863036 | 2944 | reset_crda_timeouts(); |
c37722bd | 2945 | |
c492db37 | 2946 | lr = get_last_request(); |
abc7381b | 2947 | |
b2e1b302 | 2948 | /* Note that this doesn't update the wiphys, this is done below */ |
3b9e5aca LR |
2949 | switch (lr->initiator) { |
2950 | case NL80211_REGDOM_SET_BY_CORE: | |
2951 | r = reg_set_rd_core(rd); | |
2952 | break; | |
2953 | case NL80211_REGDOM_SET_BY_USER: | |
84721d44 | 2954 | r = reg_set_rd_user(rd, lr); |
092008ab | 2955 | user_reset = true; |
84721d44 | 2956 | break; |
3b9e5aca | 2957 | case NL80211_REGDOM_SET_BY_DRIVER: |
f5fe3247 LR |
2958 | r = reg_set_rd_driver(rd, lr); |
2959 | break; | |
3b9e5aca | 2960 | case NL80211_REGDOM_SET_BY_COUNTRY_IE: |
01992406 | 2961 | r = reg_set_rd_country_ie(rd, lr); |
3b9e5aca LR |
2962 | break; |
2963 | default: | |
2964 | WARN(1, "invalid initiator %d\n", lr->initiator); | |
09d11800 | 2965 | kfree(rd); |
3b9e5aca LR |
2966 | return -EINVAL; |
2967 | } | |
2968 | ||
d2372b31 | 2969 | if (r) { |
092008ab JD |
2970 | switch (r) { |
2971 | case -EALREADY: | |
95908535 | 2972 | reg_set_request_processed(); |
092008ab JD |
2973 | break; |
2974 | default: | |
2975 | /* Back to world regulatory in case of errors */ | |
2976 | restore_regulatory_settings(user_reset); | |
2977 | } | |
95908535 | 2978 | |
d2372b31 | 2979 | kfree(rd); |
38fd2143 | 2980 | return r; |
d2372b31 | 2981 | } |
b2e1b302 | 2982 | |
b2e1b302 | 2983 | /* This would make this whole thing pointless */ |
38fd2143 JB |
2984 | if (WARN_ON(!lr->intersect && rd != get_cfg80211_regdom())) |
2985 | return -EINVAL; | |
b2e1b302 LR |
2986 | |
2987 | /* update all wiphys now with the new established regulatory domain */ | |
c492db37 | 2988 | update_all_wiphy_regulatory(lr->initiator); |
b2e1b302 | 2989 | |
458f4f9e | 2990 | print_regdomain(get_cfg80211_regdom()); |
b2e1b302 | 2991 | |
c492db37 | 2992 | nl80211_send_reg_change_event(lr); |
73d54c9e | 2993 | |
b2e253cf LR |
2994 | reg_set_request_processed(); |
2995 | ||
38fd2143 | 2996 | return 0; |
b2e1b302 LR |
2997 | } |
2998 | ||
2c3e861c AN |
2999 | static int __regulatory_set_wiphy_regd(struct wiphy *wiphy, |
3000 | struct ieee80211_regdomain *rd) | |
b0d7aa59 JD |
3001 | { |
3002 | const struct ieee80211_regdomain *regd; | |
3003 | const struct ieee80211_regdomain *prev_regd; | |
3004 | struct cfg80211_registered_device *rdev; | |
3005 | ||
3006 | if (WARN_ON(!wiphy || !rd)) | |
3007 | return -EINVAL; | |
3008 | ||
3009 | if (WARN(!(wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED), | |
3010 | "wiphy should have REGULATORY_WIPHY_SELF_MANAGED\n")) | |
3011 | return -EPERM; | |
3012 | ||
3013 | if (WARN(!is_valid_rd(rd), "Invalid regulatory domain detected\n")) { | |
3014 | print_regdomain_info(rd); | |
3015 | return -EINVAL; | |
3016 | } | |
3017 | ||
3018 | regd = reg_copy_regd(rd); | |
3019 | if (IS_ERR(regd)) | |
3020 | return PTR_ERR(regd); | |
3021 | ||
3022 | rdev = wiphy_to_rdev(wiphy); | |
3023 | ||
3024 | spin_lock(®_requests_lock); | |
3025 | prev_regd = rdev->requested_regd; | |
3026 | rdev->requested_regd = regd; | |
3027 | spin_unlock(®_requests_lock); | |
3028 | ||
3029 | kfree(prev_regd); | |
2c3e861c AN |
3030 | return 0; |
3031 | } | |
3032 | ||
3033 | int regulatory_set_wiphy_regd(struct wiphy *wiphy, | |
3034 | struct ieee80211_regdomain *rd) | |
3035 | { | |
3036 | int ret = __regulatory_set_wiphy_regd(wiphy, rd); | |
3037 | ||
3038 | if (ret) | |
3039 | return ret; | |
b0d7aa59 JD |
3040 | |
3041 | schedule_work(®_work); | |
3042 | return 0; | |
3043 | } | |
3044 | EXPORT_SYMBOL(regulatory_set_wiphy_regd); | |
3045 | ||
2c3e861c AN |
3046 | int regulatory_set_wiphy_regd_sync_rtnl(struct wiphy *wiphy, |
3047 | struct ieee80211_regdomain *rd) | |
3048 | { | |
3049 | int ret; | |
3050 | ||
3051 | ASSERT_RTNL(); | |
3052 | ||
3053 | ret = __regulatory_set_wiphy_regd(wiphy, rd); | |
3054 | if (ret) | |
3055 | return ret; | |
3056 | ||
3057 | /* process the request immediately */ | |
3058 | reg_process_self_managed_hints(); | |
3059 | return 0; | |
3060 | } | |
3061 | EXPORT_SYMBOL(regulatory_set_wiphy_regd_sync_rtnl); | |
3062 | ||
57b5ce07 LR |
3063 | void wiphy_regulatory_register(struct wiphy *wiphy) |
3064 | { | |
23df0b73 AN |
3065 | struct regulatory_request *lr; |
3066 | ||
b0d7aa59 JD |
3067 | /* self-managed devices ignore external hints */ |
3068 | if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) | |
3069 | wiphy->regulatory_flags |= REGULATORY_DISABLE_BEACON_HINTS | | |
3070 | REGULATORY_COUNTRY_IE_IGNORE; | |
3071 | ||
57b5ce07 LR |
3072 | if (!reg_dev_ignore_cell_hint(wiphy)) |
3073 | reg_num_devs_support_basehint++; | |
3074 | ||
23df0b73 AN |
3075 | lr = get_last_request(); |
3076 | wiphy_update_regulatory(wiphy, lr->initiator); | |
57b5ce07 LR |
3077 | } |
3078 | ||
bfead080 | 3079 | void wiphy_regulatory_deregister(struct wiphy *wiphy) |
3f2355cb | 3080 | { |
0ad8acaf | 3081 | struct wiphy *request_wiphy = NULL; |
c492db37 | 3082 | struct regulatory_request *lr; |
761cf7ec | 3083 | |
c492db37 | 3084 | lr = get_last_request(); |
abc7381b | 3085 | |
57b5ce07 LR |
3086 | if (!reg_dev_ignore_cell_hint(wiphy)) |
3087 | reg_num_devs_support_basehint--; | |
3088 | ||
458f4f9e | 3089 | rcu_free_regdom(get_wiphy_regdom(wiphy)); |
34dd886c | 3090 | RCU_INIT_POINTER(wiphy->regd, NULL); |
0ef9ccdd | 3091 | |
c492db37 JB |
3092 | if (lr) |
3093 | request_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx); | |
806a9e39 | 3094 | |
0ef9ccdd | 3095 | if (!request_wiphy || request_wiphy != wiphy) |
38fd2143 | 3096 | return; |
0ef9ccdd | 3097 | |
c492db37 JB |
3098 | lr->wiphy_idx = WIPHY_IDX_INVALID; |
3099 | lr->country_ie_env = ENVIRON_ANY; | |
3f2355cb LR |
3100 | } |
3101 | ||
174e0cd2 IP |
3102 | /* |
3103 | * See http://www.fcc.gov/document/5-ghz-unlicensed-spectrum-unii, for | |
3104 | * UNII band definitions | |
3105 | */ | |
3106 | int cfg80211_get_unii(int freq) | |
3107 | { | |
3108 | /* UNII-1 */ | |
3109 | if (freq >= 5150 && freq <= 5250) | |
3110 | return 0; | |
3111 | ||
3112 | /* UNII-2A */ | |
3113 | if (freq > 5250 && freq <= 5350) | |
3114 | return 1; | |
3115 | ||
3116 | /* UNII-2B */ | |
3117 | if (freq > 5350 && freq <= 5470) | |
3118 | return 2; | |
3119 | ||
3120 | /* UNII-2C */ | |
3121 | if (freq > 5470 && freq <= 5725) | |
3122 | return 3; | |
3123 | ||
3124 | /* UNII-3 */ | |
3125 | if (freq > 5725 && freq <= 5825) | |
3126 | return 4; | |
3127 | ||
3128 | return -EINVAL; | |
3129 | } | |
3130 | ||
c8866e55 IP |
3131 | bool regulatory_indoor_allowed(void) |
3132 | { | |
3133 | return reg_is_indoor; | |
3134 | } | |
3135 | ||
2fcc9f73 | 3136 | int __init regulatory_init(void) |
b2e1b302 | 3137 | { |
bcf4f99b | 3138 | int err = 0; |
734366de | 3139 | |
b2e1b302 LR |
3140 | reg_pdev = platform_device_register_simple("regulatory", 0, NULL, 0); |
3141 | if (IS_ERR(reg_pdev)) | |
3142 | return PTR_ERR(reg_pdev); | |
734366de | 3143 | |
fe33eb39 | 3144 | spin_lock_init(®_requests_lock); |
e38f8a7a | 3145 | spin_lock_init(®_pending_beacons_lock); |
05050753 | 3146 | spin_lock_init(®_indoor_lock); |
fe33eb39 | 3147 | |
80007efe LR |
3148 | reg_regdb_size_check(); |
3149 | ||
458f4f9e | 3150 | rcu_assign_pointer(cfg80211_regdomain, cfg80211_world_regdom); |
734366de | 3151 | |
09d989d1 LR |
3152 | user_alpha2[0] = '9'; |
3153 | user_alpha2[1] = '7'; | |
3154 | ||
ae9e4b0d | 3155 | /* We always try to get an update for the static regdomain */ |
458f4f9e | 3156 | err = regulatory_hint_core(cfg80211_world_regdom->alpha2); |
ba25c141 | 3157 | if (err) { |
09d11800 OO |
3158 | if (err == -ENOMEM) { |
3159 | platform_device_unregister(reg_pdev); | |
bcf4f99b | 3160 | return err; |
09d11800 | 3161 | } |
bcf4f99b LR |
3162 | /* |
3163 | * N.B. kobject_uevent_env() can fail mainly for when we're out | |
3164 | * memory which is handled and propagated appropriately above | |
3165 | * but it can also fail during a netlink_broadcast() or during | |
3166 | * early boot for call_usermodehelper(). For now treat these | |
3167 | * errors as non-fatal. | |
3168 | */ | |
e9c0268f | 3169 | pr_err("kobject_uevent_env() was unable to call CRDA during init\n"); |
bcf4f99b | 3170 | } |
734366de | 3171 | |
ae9e4b0d LR |
3172 | /* |
3173 | * Finally, if the user set the module parameter treat it | |
3174 | * as a user hint. | |
3175 | */ | |
3176 | if (!is_world_regdom(ieee80211_regdom)) | |
57b5ce07 LR |
3177 | regulatory_hint_user(ieee80211_regdom, |
3178 | NL80211_USER_REG_HINT_USER); | |
ae9e4b0d | 3179 | |
b2e1b302 LR |
3180 | return 0; |
3181 | } | |
3182 | ||
1a919318 | 3183 | void regulatory_exit(void) |
b2e1b302 | 3184 | { |
fe33eb39 | 3185 | struct regulatory_request *reg_request, *tmp; |
e38f8a7a | 3186 | struct reg_beacon *reg_beacon, *btmp; |
fe33eb39 LR |
3187 | |
3188 | cancel_work_sync(®_work); | |
b6863036 | 3189 | cancel_crda_timeout_sync(); |
ad932f04 | 3190 | cancel_delayed_work_sync(®_check_chans); |
fe33eb39 | 3191 | |
9027b149 | 3192 | /* Lock to suppress warnings */ |
38fd2143 | 3193 | rtnl_lock(); |
379b82f4 | 3194 | reset_regdomains(true, NULL); |
38fd2143 | 3195 | rtnl_unlock(); |
734366de | 3196 | |
58ebacc6 | 3197 | dev_set_uevent_suppress(®_pdev->dev, true); |
f6037d09 | 3198 | |
b2e1b302 | 3199 | platform_device_unregister(reg_pdev); |
734366de | 3200 | |
fea9bced JB |
3201 | list_for_each_entry_safe(reg_beacon, btmp, ®_pending_beacons, list) { |
3202 | list_del(®_beacon->list); | |
3203 | kfree(reg_beacon); | |
e38f8a7a | 3204 | } |
e38f8a7a | 3205 | |
fea9bced JB |
3206 | list_for_each_entry_safe(reg_beacon, btmp, ®_beacon_list, list) { |
3207 | list_del(®_beacon->list); | |
3208 | kfree(reg_beacon); | |
e38f8a7a LR |
3209 | } |
3210 | ||
fea9bced JB |
3211 | list_for_each_entry_safe(reg_request, tmp, ®_requests_list, list) { |
3212 | list_del(®_request->list); | |
3213 | kfree(reg_request); | |
fe33eb39 | 3214 | } |
8318d78a | 3215 | } |