]>
Commit | Line | Data |
---|---|---|
8318d78a JB |
1 | /* |
2 | * Copyright 2002-2005, Instant802 Networks, Inc. | |
3 | * Copyright 2005-2006, Devicescape Software, Inc. | |
4 | * Copyright 2007 Johannes Berg <johannes@sipsolutions.net> | |
3b77d5ec | 5 | * Copyright 2008-2011 Luis R. Rodriguez <mcgrof@qca.qualcomm.com> |
8318d78a | 6 | * |
3b77d5ec LR |
7 | * Permission to use, copy, modify, and/or distribute this software for any |
8 | * purpose with or without fee is hereby granted, provided that the above | |
9 | * copyright notice and this permission notice appear in all copies. | |
10 | * | |
11 | * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES | |
12 | * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF | |
13 | * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR | |
14 | * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES | |
15 | * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN | |
16 | * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF | |
17 | * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. | |
8318d78a JB |
18 | */ |
19 | ||
3b77d5ec | 20 | |
b2e1b302 LR |
21 | /** |
22 | * DOC: Wireless regulatory infrastructure | |
8318d78a JB |
23 | * |
24 | * The usual implementation is for a driver to read a device EEPROM to | |
25 | * determine which regulatory domain it should be operating under, then | |
26 | * looking up the allowable channels in a driver-local table and finally | |
27 | * registering those channels in the wiphy structure. | |
28 | * | |
b2e1b302 LR |
29 | * Another set of compliance enforcement is for drivers to use their |
30 | * own compliance limits which can be stored on the EEPROM. The host | |
31 | * driver or firmware may ensure these are used. | |
32 | * | |
33 | * In addition to all this we provide an extra layer of regulatory | |
34 | * conformance. For drivers which do not have any regulatory | |
35 | * information CRDA provides the complete regulatory solution. | |
36 | * For others it provides a community effort on further restrictions | |
37 | * to enhance compliance. | |
38 | * | |
39 | * Note: When number of rules --> infinity we will not be able to | |
40 | * index on alpha2 any more, instead we'll probably have to | |
41 | * rely on some SHA1 checksum of the regdomain for example. | |
42 | * | |
8318d78a | 43 | */ |
e9c0268f JP |
44 | |
45 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt | |
46 | ||
8318d78a | 47 | #include <linux/kernel.h> |
bc3b2d7f | 48 | #include <linux/export.h> |
5a0e3ad6 | 49 | #include <linux/slab.h> |
b2e1b302 | 50 | #include <linux/list.h> |
c61029c7 | 51 | #include <linux/ctype.h> |
b2e1b302 LR |
52 | #include <linux/nl80211.h> |
53 | #include <linux/platform_device.h> | |
d9b93842 | 54 | #include <linux/moduleparam.h> |
b2e1b302 | 55 | #include <net/cfg80211.h> |
8318d78a | 56 | #include "core.h" |
b2e1b302 | 57 | #include "reg.h" |
3b377ea9 | 58 | #include "regdb.h" |
73d54c9e | 59 | #include "nl80211.h" |
8318d78a | 60 | |
4113f751 | 61 | #ifdef CONFIG_CFG80211_REG_DEBUG |
12c5ffb5 JP |
62 | #define REG_DBG_PRINT(format, args...) \ |
63 | printk(KERN_DEBUG pr_fmt(format), ##args) | |
4113f751 | 64 | #else |
8271195e | 65 | #define REG_DBG_PRINT(args...) |
4113f751 LR |
66 | #endif |
67 | ||
2f92212b JB |
68 | enum reg_request_treatment { |
69 | REG_REQ_OK, | |
70 | REG_REQ_IGNORE, | |
71 | REG_REQ_INTERSECT, | |
72 | REG_REQ_ALREADY_SET, | |
73 | }; | |
74 | ||
a042994d LR |
75 | static struct regulatory_request core_request_world = { |
76 | .initiator = NL80211_REGDOM_SET_BY_CORE, | |
77 | .alpha2[0] = '0', | |
78 | .alpha2[1] = '0', | |
79 | .intersect = false, | |
80 | .processed = true, | |
81 | .country_ie_env = ENVIRON_ANY, | |
82 | }; | |
83 | ||
38fd2143 JB |
84 | /* |
85 | * Receipt of information from last regulatory request, | |
86 | * protected by RTNL (and can be accessed with RCU protection) | |
87 | */ | |
c492db37 JB |
88 | static struct regulatory_request __rcu *last_request = |
89 | (void __rcu *)&core_request_world; | |
734366de | 90 | |
b2e1b302 LR |
91 | /* To trigger userspace events */ |
92 | static struct platform_device *reg_pdev; | |
8318d78a | 93 | |
f1e3d556 | 94 | static const struct device_type reg_device_type = { |
4d9d88d1 SJR |
95 | .uevent = reg_device_uevent, |
96 | }; | |
97 | ||
fb1fc7ad LR |
98 | /* |
99 | * Central wireless core regulatory domains, we only need two, | |
734366de | 100 | * the current one and a world regulatory domain in case we have no |
e8da2bb4 | 101 | * information to give us an alpha2. |
38fd2143 | 102 | * (protected by RTNL, can be read under RCU) |
fb1fc7ad | 103 | */ |
458f4f9e | 104 | const struct ieee80211_regdomain __rcu *cfg80211_regdomain; |
734366de | 105 | |
57b5ce07 LR |
106 | /* |
107 | * Number of devices that registered to the core | |
108 | * that support cellular base station regulatory hints | |
38fd2143 | 109 | * (protected by RTNL) |
57b5ce07 LR |
110 | */ |
111 | static int reg_num_devs_support_basehint; | |
112 | ||
458f4f9e JB |
113 | static const struct ieee80211_regdomain *get_cfg80211_regdom(void) |
114 | { | |
38fd2143 | 115 | return rtnl_dereference(cfg80211_regdomain); |
458f4f9e JB |
116 | } |
117 | ||
118 | static const struct ieee80211_regdomain *get_wiphy_regdom(struct wiphy *wiphy) | |
119 | { | |
38fd2143 | 120 | return rtnl_dereference(wiphy->regd); |
458f4f9e JB |
121 | } |
122 | ||
3ef121b5 LR |
123 | static const char *reg_dfs_region_str(enum nl80211_dfs_regions dfs_region) |
124 | { | |
125 | switch (dfs_region) { | |
126 | case NL80211_DFS_UNSET: | |
127 | return "unset"; | |
128 | case NL80211_DFS_FCC: | |
129 | return "FCC"; | |
130 | case NL80211_DFS_ETSI: | |
131 | return "ETSI"; | |
132 | case NL80211_DFS_JP: | |
133 | return "JP"; | |
134 | } | |
135 | return "Unknown"; | |
136 | } | |
137 | ||
6c474799 LR |
138 | enum nl80211_dfs_regions reg_get_dfs_region(struct wiphy *wiphy) |
139 | { | |
140 | const struct ieee80211_regdomain *regd = NULL; | |
141 | const struct ieee80211_regdomain *wiphy_regd = NULL; | |
142 | ||
143 | regd = get_cfg80211_regdom(); | |
144 | if (!wiphy) | |
145 | goto out; | |
146 | ||
147 | wiphy_regd = get_wiphy_regdom(wiphy); | |
148 | if (!wiphy_regd) | |
149 | goto out; | |
150 | ||
151 | if (wiphy_regd->dfs_region == regd->dfs_region) | |
152 | goto out; | |
153 | ||
154 | REG_DBG_PRINT("%s: device specific dfs_region " | |
155 | "(%s) disagrees with cfg80211's " | |
156 | "central dfs_region (%s)\n", | |
157 | dev_name(&wiphy->dev), | |
158 | reg_dfs_region_str(wiphy_regd->dfs_region), | |
159 | reg_dfs_region_str(regd->dfs_region)); | |
160 | ||
161 | out: | |
162 | return regd->dfs_region; | |
163 | } | |
164 | ||
458f4f9e JB |
165 | static void rcu_free_regdom(const struct ieee80211_regdomain *r) |
166 | { | |
167 | if (!r) | |
168 | return; | |
169 | kfree_rcu((struct ieee80211_regdomain *)r, rcu_head); | |
170 | } | |
171 | ||
c492db37 JB |
172 | static struct regulatory_request *get_last_request(void) |
173 | { | |
38fd2143 | 174 | return rcu_dereference_rtnl(last_request); |
c492db37 JB |
175 | } |
176 | ||
e38f8a7a | 177 | /* Used to queue up regulatory hints */ |
fe33eb39 LR |
178 | static LIST_HEAD(reg_requests_list); |
179 | static spinlock_t reg_requests_lock; | |
180 | ||
e38f8a7a LR |
181 | /* Used to queue up beacon hints for review */ |
182 | static LIST_HEAD(reg_pending_beacons); | |
183 | static spinlock_t reg_pending_beacons_lock; | |
184 | ||
185 | /* Used to keep track of processed beacon hints */ | |
186 | static LIST_HEAD(reg_beacon_list); | |
187 | ||
188 | struct reg_beacon { | |
189 | struct list_head list; | |
190 | struct ieee80211_channel chan; | |
191 | }; | |
192 | ||
f333a7a2 LR |
193 | static void reg_todo(struct work_struct *work); |
194 | static DECLARE_WORK(reg_work, reg_todo); | |
195 | ||
a90c7a31 LR |
196 | static void reg_timeout_work(struct work_struct *work); |
197 | static DECLARE_DELAYED_WORK(reg_timeout, reg_timeout_work); | |
198 | ||
734366de JB |
199 | /* We keep a static world regulatory domain in case of the absence of CRDA */ |
200 | static const struct ieee80211_regdomain world_regdom = { | |
90cdc6df | 201 | .n_reg_rules = 6, |
734366de JB |
202 | .alpha2 = "00", |
203 | .reg_rules = { | |
68798a62 LR |
204 | /* IEEE 802.11b/g, channels 1..11 */ |
205 | REG_RULE(2412-10, 2462+10, 40, 6, 20, 0), | |
43c771a1 JB |
206 | /* IEEE 802.11b/g, channels 12..13. */ |
207 | REG_RULE(2467-10, 2472+10, 40, 6, 20, | |
8fe02e16 | 208 | NL80211_RRF_NO_IR), |
611b6a82 LR |
209 | /* IEEE 802.11 channel 14 - Only JP enables |
210 | * this and for 802.11b only */ | |
211 | REG_RULE(2484-10, 2484+10, 20, 6, 20, | |
8fe02e16 | 212 | NL80211_RRF_NO_IR | |
611b6a82 LR |
213 | NL80211_RRF_NO_OFDM), |
214 | /* IEEE 802.11a, channel 36..48 */ | |
131a19bc | 215 | REG_RULE(5180-10, 5240+10, 160, 6, 20, |
8fe02e16 | 216 | NL80211_RRF_NO_IR), |
3fc71f77 | 217 | |
131a19bc JB |
218 | /* IEEE 802.11a, channel 52..64 - DFS required */ |
219 | REG_RULE(5260-10, 5320+10, 160, 6, 20, | |
8fe02e16 | 220 | NL80211_RRF_NO_IR | |
131a19bc JB |
221 | NL80211_RRF_DFS), |
222 | ||
223 | /* IEEE 802.11a, channel 100..144 - DFS required */ | |
224 | REG_RULE(5500-10, 5720+10, 160, 6, 20, | |
8fe02e16 | 225 | NL80211_RRF_NO_IR | |
131a19bc | 226 | NL80211_RRF_DFS), |
3fc71f77 LR |
227 | |
228 | /* IEEE 802.11a, channel 149..165 */ | |
8ab9d85c | 229 | REG_RULE(5745-10, 5825+10, 80, 6, 20, |
8fe02e16 | 230 | NL80211_RRF_NO_IR), |
90cdc6df VK |
231 | |
232 | /* IEEE 802.11ad (60gHz), channels 1..3 */ | |
233 | REG_RULE(56160+2160*1-1080, 56160+2160*3+1080, 2160, 0, 0, 0), | |
734366de JB |
234 | } |
235 | }; | |
236 | ||
38fd2143 | 237 | /* protected by RTNL */ |
a3d2eaf0 JB |
238 | static const struct ieee80211_regdomain *cfg80211_world_regdom = |
239 | &world_regdom; | |
734366de | 240 | |
6ee7d330 | 241 | static char *ieee80211_regdom = "00"; |
09d989d1 | 242 | static char user_alpha2[2]; |
6ee7d330 | 243 | |
734366de JB |
244 | module_param(ieee80211_regdom, charp, 0444); |
245 | MODULE_PARM_DESC(ieee80211_regdom, "IEEE 802.11 regulatory domain code"); | |
246 | ||
5ad6ef5e LR |
247 | static void reg_kfree_last_request(void) |
248 | { | |
249 | struct regulatory_request *lr; | |
250 | ||
251 | lr = get_last_request(); | |
252 | ||
253 | if (lr != &core_request_world && lr) | |
254 | kfree_rcu(lr, rcu_head); | |
255 | } | |
256 | ||
05f1a3ea LR |
257 | static void reg_update_last_request(struct regulatory_request *request) |
258 | { | |
259 | reg_kfree_last_request(); | |
260 | rcu_assign_pointer(last_request, request); | |
261 | } | |
262 | ||
379b82f4 JB |
263 | static void reset_regdomains(bool full_reset, |
264 | const struct ieee80211_regdomain *new_regdom) | |
734366de | 265 | { |
458f4f9e JB |
266 | const struct ieee80211_regdomain *r; |
267 | ||
38fd2143 | 268 | ASSERT_RTNL(); |
e8da2bb4 | 269 | |
458f4f9e JB |
270 | r = get_cfg80211_regdom(); |
271 | ||
942b25cf | 272 | /* avoid freeing static information or freeing something twice */ |
458f4f9e JB |
273 | if (r == cfg80211_world_regdom) |
274 | r = NULL; | |
942b25cf JB |
275 | if (cfg80211_world_regdom == &world_regdom) |
276 | cfg80211_world_regdom = NULL; | |
458f4f9e JB |
277 | if (r == &world_regdom) |
278 | r = NULL; | |
942b25cf | 279 | |
458f4f9e JB |
280 | rcu_free_regdom(r); |
281 | rcu_free_regdom(cfg80211_world_regdom); | |
734366de | 282 | |
a3d2eaf0 | 283 | cfg80211_world_regdom = &world_regdom; |
458f4f9e | 284 | rcu_assign_pointer(cfg80211_regdomain, new_regdom); |
a042994d LR |
285 | |
286 | if (!full_reset) | |
287 | return; | |
288 | ||
05f1a3ea | 289 | reg_update_last_request(&core_request_world); |
734366de JB |
290 | } |
291 | ||
fb1fc7ad LR |
292 | /* |
293 | * Dynamic world regulatory domain requested by the wireless | |
294 | * core upon initialization | |
295 | */ | |
a3d2eaf0 | 296 | static void update_world_regdomain(const struct ieee80211_regdomain *rd) |
734366de | 297 | { |
c492db37 | 298 | struct regulatory_request *lr; |
734366de | 299 | |
c492db37 JB |
300 | lr = get_last_request(); |
301 | ||
302 | WARN_ON(!lr); | |
734366de | 303 | |
379b82f4 | 304 | reset_regdomains(false, rd); |
734366de JB |
305 | |
306 | cfg80211_world_regdom = rd; | |
734366de | 307 | } |
734366de | 308 | |
a3d2eaf0 | 309 | bool is_world_regdom(const char *alpha2) |
b2e1b302 LR |
310 | { |
311 | if (!alpha2) | |
312 | return false; | |
1a919318 | 313 | return alpha2[0] == '0' && alpha2[1] == '0'; |
b2e1b302 | 314 | } |
8318d78a | 315 | |
a3d2eaf0 | 316 | static bool is_alpha2_set(const char *alpha2) |
b2e1b302 LR |
317 | { |
318 | if (!alpha2) | |
319 | return false; | |
1a919318 | 320 | return alpha2[0] && alpha2[1]; |
b2e1b302 | 321 | } |
8318d78a | 322 | |
a3d2eaf0 | 323 | static bool is_unknown_alpha2(const char *alpha2) |
b2e1b302 LR |
324 | { |
325 | if (!alpha2) | |
326 | return false; | |
fb1fc7ad LR |
327 | /* |
328 | * Special case where regulatory domain was built by driver | |
329 | * but a specific alpha2 cannot be determined | |
330 | */ | |
1a919318 | 331 | return alpha2[0] == '9' && alpha2[1] == '9'; |
b2e1b302 | 332 | } |
8318d78a | 333 | |
3f2355cb LR |
334 | static bool is_intersected_alpha2(const char *alpha2) |
335 | { | |
336 | if (!alpha2) | |
337 | return false; | |
fb1fc7ad LR |
338 | /* |
339 | * Special case where regulatory domain is the | |
3f2355cb | 340 | * result of an intersection between two regulatory domain |
fb1fc7ad LR |
341 | * structures |
342 | */ | |
1a919318 | 343 | return alpha2[0] == '9' && alpha2[1] == '8'; |
3f2355cb LR |
344 | } |
345 | ||
a3d2eaf0 | 346 | static bool is_an_alpha2(const char *alpha2) |
b2e1b302 LR |
347 | { |
348 | if (!alpha2) | |
349 | return false; | |
1a919318 | 350 | return isalpha(alpha2[0]) && isalpha(alpha2[1]); |
b2e1b302 | 351 | } |
8318d78a | 352 | |
a3d2eaf0 | 353 | static bool alpha2_equal(const char *alpha2_x, const char *alpha2_y) |
b2e1b302 LR |
354 | { |
355 | if (!alpha2_x || !alpha2_y) | |
356 | return false; | |
1a919318 | 357 | return alpha2_x[0] == alpha2_y[0] && alpha2_x[1] == alpha2_y[1]; |
b2e1b302 LR |
358 | } |
359 | ||
69b1572b | 360 | static bool regdom_changes(const char *alpha2) |
b2e1b302 | 361 | { |
458f4f9e | 362 | const struct ieee80211_regdomain *r = get_cfg80211_regdom(); |
761cf7ec | 363 | |
458f4f9e | 364 | if (!r) |
b2e1b302 | 365 | return true; |
458f4f9e | 366 | return !alpha2_equal(r->alpha2, alpha2); |
b2e1b302 LR |
367 | } |
368 | ||
09d989d1 LR |
369 | /* |
370 | * The NL80211_REGDOM_SET_BY_USER regdom alpha2 is cached, this lets | |
371 | * you know if a valid regulatory hint with NL80211_REGDOM_SET_BY_USER | |
372 | * has ever been issued. | |
373 | */ | |
374 | static bool is_user_regdom_saved(void) | |
375 | { | |
376 | if (user_alpha2[0] == '9' && user_alpha2[1] == '7') | |
377 | return false; | |
378 | ||
379 | /* This would indicate a mistake on the design */ | |
1a919318 | 380 | if (WARN(!is_world_regdom(user_alpha2) && !is_an_alpha2(user_alpha2), |
09d989d1 | 381 | "Unexpected user alpha2: %c%c\n", |
1a919318 | 382 | user_alpha2[0], user_alpha2[1])) |
09d989d1 LR |
383 | return false; |
384 | ||
385 | return true; | |
386 | } | |
387 | ||
e9763c3c JB |
388 | static const struct ieee80211_regdomain * |
389 | reg_copy_regd(const struct ieee80211_regdomain *src_regd) | |
3b377ea9 JL |
390 | { |
391 | struct ieee80211_regdomain *regd; | |
e9763c3c | 392 | int size_of_regd; |
3b377ea9 JL |
393 | unsigned int i; |
394 | ||
82f20856 JB |
395 | size_of_regd = |
396 | sizeof(struct ieee80211_regdomain) + | |
397 | src_regd->n_reg_rules * sizeof(struct ieee80211_reg_rule); | |
3b377ea9 JL |
398 | |
399 | regd = kzalloc(size_of_regd, GFP_KERNEL); | |
400 | if (!regd) | |
e9763c3c | 401 | return ERR_PTR(-ENOMEM); |
3b377ea9 JL |
402 | |
403 | memcpy(regd, src_regd, sizeof(struct ieee80211_regdomain)); | |
404 | ||
405 | for (i = 0; i < src_regd->n_reg_rules; i++) | |
406 | memcpy(®d->reg_rules[i], &src_regd->reg_rules[i], | |
e9763c3c | 407 | sizeof(struct ieee80211_reg_rule)); |
3b377ea9 | 408 | |
e9763c3c | 409 | return regd; |
3b377ea9 JL |
410 | } |
411 | ||
412 | #ifdef CONFIG_CFG80211_INTERNAL_REGDB | |
413 | struct reg_regdb_search_request { | |
414 | char alpha2[2]; | |
415 | struct list_head list; | |
416 | }; | |
417 | ||
418 | static LIST_HEAD(reg_regdb_search_list); | |
368d06f5 | 419 | static DEFINE_MUTEX(reg_regdb_search_mutex); |
3b377ea9 JL |
420 | |
421 | static void reg_regdb_search(struct work_struct *work) | |
422 | { | |
423 | struct reg_regdb_search_request *request; | |
e9763c3c JB |
424 | const struct ieee80211_regdomain *curdom, *regdom = NULL; |
425 | int i; | |
a85d0d7f | 426 | |
5fe231e8 | 427 | rtnl_lock(); |
3b377ea9 | 428 | |
368d06f5 | 429 | mutex_lock(®_regdb_search_mutex); |
3b377ea9 JL |
430 | while (!list_empty(®_regdb_search_list)) { |
431 | request = list_first_entry(®_regdb_search_list, | |
432 | struct reg_regdb_search_request, | |
433 | list); | |
434 | list_del(&request->list); | |
435 | ||
1a919318 | 436 | for (i = 0; i < reg_regdb_size; i++) { |
3b377ea9 JL |
437 | curdom = reg_regdb[i]; |
438 | ||
1a919318 | 439 | if (alpha2_equal(request->alpha2, curdom->alpha2)) { |
e9763c3c | 440 | regdom = reg_copy_regd(curdom); |
3b377ea9 JL |
441 | break; |
442 | } | |
443 | } | |
444 | ||
445 | kfree(request); | |
446 | } | |
368d06f5 | 447 | mutex_unlock(®_regdb_search_mutex); |
a85d0d7f | 448 | |
e9763c3c | 449 | if (!IS_ERR_OR_NULL(regdom)) |
a85d0d7f LR |
450 | set_regdom(regdom); |
451 | ||
5fe231e8 | 452 | rtnl_unlock(); |
3b377ea9 JL |
453 | } |
454 | ||
455 | static DECLARE_WORK(reg_regdb_work, reg_regdb_search); | |
456 | ||
457 | static void reg_regdb_query(const char *alpha2) | |
458 | { | |
459 | struct reg_regdb_search_request *request; | |
460 | ||
461 | if (!alpha2) | |
462 | return; | |
463 | ||
464 | request = kzalloc(sizeof(struct reg_regdb_search_request), GFP_KERNEL); | |
465 | if (!request) | |
466 | return; | |
467 | ||
468 | memcpy(request->alpha2, alpha2, 2); | |
469 | ||
368d06f5 | 470 | mutex_lock(®_regdb_search_mutex); |
3b377ea9 | 471 | list_add_tail(&request->list, ®_regdb_search_list); |
368d06f5 | 472 | mutex_unlock(®_regdb_search_mutex); |
3b377ea9 JL |
473 | |
474 | schedule_work(®_regdb_work); | |
475 | } | |
80007efe LR |
476 | |
477 | /* Feel free to add any other sanity checks here */ | |
478 | static void reg_regdb_size_check(void) | |
479 | { | |
480 | /* We should ideally BUILD_BUG_ON() but then random builds would fail */ | |
481 | WARN_ONCE(!reg_regdb_size, "db.txt is empty, you should update it..."); | |
482 | } | |
3b377ea9 | 483 | #else |
80007efe | 484 | static inline void reg_regdb_size_check(void) {} |
3b377ea9 JL |
485 | static inline void reg_regdb_query(const char *alpha2) {} |
486 | #endif /* CONFIG_CFG80211_INTERNAL_REGDB */ | |
487 | ||
fb1fc7ad LR |
488 | /* |
489 | * This lets us keep regulatory code which is updated on a regulatory | |
4d9d88d1 SJR |
490 | * basis in userspace. Country information is filled in by |
491 | * reg_device_uevent | |
fb1fc7ad | 492 | */ |
b2e1b302 LR |
493 | static int call_crda(const char *alpha2) |
494 | { | |
b2e1b302 | 495 | if (!is_world_regdom((char *) alpha2)) |
e9c0268f | 496 | pr_info("Calling CRDA for country: %c%c\n", |
b2e1b302 LR |
497 | alpha2[0], alpha2[1]); |
498 | else | |
e9c0268f | 499 | pr_info("Calling CRDA to update world regulatory domain\n"); |
b2e1b302 | 500 | |
3b377ea9 JL |
501 | /* query internal regulatory database (if it exists) */ |
502 | reg_regdb_query(alpha2); | |
503 | ||
4d9d88d1 | 504 | return kobject_uevent(®_pdev->dev.kobj, KOBJ_CHANGE); |
b2e1b302 LR |
505 | } |
506 | ||
fe6631ff LR |
507 | static enum reg_request_treatment |
508 | reg_call_crda(struct regulatory_request *request) | |
509 | { | |
510 | if (call_crda(request->alpha2)) | |
511 | return REG_REQ_IGNORE; | |
512 | return REG_REQ_OK; | |
513 | } | |
514 | ||
e438768f | 515 | bool reg_is_valid_request(const char *alpha2) |
b2e1b302 | 516 | { |
c492db37 | 517 | struct regulatory_request *lr = get_last_request(); |
61405e97 | 518 | |
c492db37 | 519 | if (!lr || lr->processed) |
f6037d09 JB |
520 | return false; |
521 | ||
c492db37 | 522 | return alpha2_equal(lr->alpha2, alpha2); |
b2e1b302 | 523 | } |
8318d78a | 524 | |
e3961af1 JD |
525 | static const struct ieee80211_regdomain *reg_get_regdomain(struct wiphy *wiphy) |
526 | { | |
527 | struct regulatory_request *lr = get_last_request(); | |
528 | ||
529 | /* | |
530 | * Follow the driver's regulatory domain, if present, unless a country | |
531 | * IE has been processed or a user wants to help complaince further | |
532 | */ | |
533 | if (lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && | |
534 | lr->initiator != NL80211_REGDOM_SET_BY_USER && | |
535 | wiphy->regd) | |
536 | return get_wiphy_regdom(wiphy); | |
537 | ||
538 | return get_cfg80211_regdom(); | |
539 | } | |
540 | ||
97524820 JD |
541 | unsigned int reg_get_max_bandwidth(const struct ieee80211_regdomain *rd, |
542 | const struct ieee80211_reg_rule *rule) | |
543 | { | |
544 | const struct ieee80211_freq_range *freq_range = &rule->freq_range; | |
545 | const struct ieee80211_freq_range *freq_range_tmp; | |
546 | const struct ieee80211_reg_rule *tmp; | |
547 | u32 start_freq, end_freq, idx, no; | |
548 | ||
549 | for (idx = 0; idx < rd->n_reg_rules; idx++) | |
550 | if (rule == &rd->reg_rules[idx]) | |
551 | break; | |
552 | ||
553 | if (idx == rd->n_reg_rules) | |
554 | return 0; | |
555 | ||
556 | /* get start_freq */ | |
557 | no = idx; | |
558 | ||
559 | while (no) { | |
560 | tmp = &rd->reg_rules[--no]; | |
561 | freq_range_tmp = &tmp->freq_range; | |
562 | ||
563 | if (freq_range_tmp->end_freq_khz < freq_range->start_freq_khz) | |
564 | break; | |
565 | ||
97524820 JD |
566 | freq_range = freq_range_tmp; |
567 | } | |
568 | ||
569 | start_freq = freq_range->start_freq_khz; | |
570 | ||
571 | /* get end_freq */ | |
572 | freq_range = &rule->freq_range; | |
573 | no = idx; | |
574 | ||
575 | while (no < rd->n_reg_rules - 1) { | |
576 | tmp = &rd->reg_rules[++no]; | |
577 | freq_range_tmp = &tmp->freq_range; | |
578 | ||
579 | if (freq_range_tmp->start_freq_khz > freq_range->end_freq_khz) | |
580 | break; | |
581 | ||
97524820 JD |
582 | freq_range = freq_range_tmp; |
583 | } | |
584 | ||
585 | end_freq = freq_range->end_freq_khz; | |
586 | ||
587 | return end_freq - start_freq; | |
588 | } | |
589 | ||
b2e1b302 | 590 | /* Sanity check on a regulatory rule */ |
a3d2eaf0 | 591 | static bool is_valid_reg_rule(const struct ieee80211_reg_rule *rule) |
8318d78a | 592 | { |
a3d2eaf0 | 593 | const struct ieee80211_freq_range *freq_range = &rule->freq_range; |
b2e1b302 LR |
594 | u32 freq_diff; |
595 | ||
91e99004 | 596 | if (freq_range->start_freq_khz <= 0 || freq_range->end_freq_khz <= 0) |
b2e1b302 LR |
597 | return false; |
598 | ||
599 | if (freq_range->start_freq_khz > freq_range->end_freq_khz) | |
600 | return false; | |
601 | ||
602 | freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz; | |
603 | ||
bd05f28e | 604 | if (freq_range->end_freq_khz <= freq_range->start_freq_khz || |
1a919318 | 605 | freq_range->max_bandwidth_khz > freq_diff) |
b2e1b302 LR |
606 | return false; |
607 | ||
608 | return true; | |
609 | } | |
610 | ||
a3d2eaf0 | 611 | static bool is_valid_rd(const struct ieee80211_regdomain *rd) |
b2e1b302 | 612 | { |
a3d2eaf0 | 613 | const struct ieee80211_reg_rule *reg_rule = NULL; |
b2e1b302 | 614 | unsigned int i; |
8318d78a | 615 | |
b2e1b302 LR |
616 | if (!rd->n_reg_rules) |
617 | return false; | |
8318d78a | 618 | |
88dc1c3f LR |
619 | if (WARN_ON(rd->n_reg_rules > NL80211_MAX_SUPP_REG_RULES)) |
620 | return false; | |
621 | ||
b2e1b302 LR |
622 | for (i = 0; i < rd->n_reg_rules; i++) { |
623 | reg_rule = &rd->reg_rules[i]; | |
624 | if (!is_valid_reg_rule(reg_rule)) | |
625 | return false; | |
626 | } | |
627 | ||
628 | return true; | |
8318d78a JB |
629 | } |
630 | ||
038659e7 | 631 | static bool reg_does_bw_fit(const struct ieee80211_freq_range *freq_range, |
fe7ef5e9 | 632 | u32 center_freq_khz, u32 bw_khz) |
b2e1b302 | 633 | { |
038659e7 LR |
634 | u32 start_freq_khz, end_freq_khz; |
635 | ||
636 | start_freq_khz = center_freq_khz - (bw_khz/2); | |
637 | end_freq_khz = center_freq_khz + (bw_khz/2); | |
638 | ||
639 | if (start_freq_khz >= freq_range->start_freq_khz && | |
640 | end_freq_khz <= freq_range->end_freq_khz) | |
641 | return true; | |
642 | ||
643 | return false; | |
b2e1b302 | 644 | } |
8318d78a | 645 | |
0c7dc45d LR |
646 | /** |
647 | * freq_in_rule_band - tells us if a frequency is in a frequency band | |
648 | * @freq_range: frequency rule we want to query | |
649 | * @freq_khz: frequency we are inquiring about | |
650 | * | |
651 | * This lets us know if a specific frequency rule is or is not relevant to | |
652 | * a specific frequency's band. Bands are device specific and artificial | |
64629b9d VK |
653 | * definitions (the "2.4 GHz band", the "5 GHz band" and the "60GHz band"), |
654 | * however it is safe for now to assume that a frequency rule should not be | |
655 | * part of a frequency's band if the start freq or end freq are off by more | |
656 | * than 2 GHz for the 2.4 and 5 GHz bands, and by more than 10 GHz for the | |
657 | * 60 GHz band. | |
0c7dc45d LR |
658 | * This resolution can be lowered and should be considered as we add |
659 | * regulatory rule support for other "bands". | |
660 | **/ | |
661 | static bool freq_in_rule_band(const struct ieee80211_freq_range *freq_range, | |
1a919318 | 662 | u32 freq_khz) |
0c7dc45d LR |
663 | { |
664 | #define ONE_GHZ_IN_KHZ 1000000 | |
64629b9d VK |
665 | /* |
666 | * From 802.11ad: directional multi-gigabit (DMG): | |
667 | * Pertaining to operation in a frequency band containing a channel | |
668 | * with the Channel starting frequency above 45 GHz. | |
669 | */ | |
670 | u32 limit = freq_khz > 45 * ONE_GHZ_IN_KHZ ? | |
671 | 10 * ONE_GHZ_IN_KHZ : 2 * ONE_GHZ_IN_KHZ; | |
672 | if (abs(freq_khz - freq_range->start_freq_khz) <= limit) | |
0c7dc45d | 673 | return true; |
64629b9d | 674 | if (abs(freq_khz - freq_range->end_freq_khz) <= limit) |
0c7dc45d LR |
675 | return true; |
676 | return false; | |
677 | #undef ONE_GHZ_IN_KHZ | |
678 | } | |
679 | ||
adbfb058 LR |
680 | /* |
681 | * Later on we can perhaps use the more restrictive DFS | |
682 | * region but we don't have information for that yet so | |
683 | * for now simply disallow conflicts. | |
684 | */ | |
685 | static enum nl80211_dfs_regions | |
686 | reg_intersect_dfs_region(const enum nl80211_dfs_regions dfs_region1, | |
687 | const enum nl80211_dfs_regions dfs_region2) | |
688 | { | |
689 | if (dfs_region1 != dfs_region2) | |
690 | return NL80211_DFS_UNSET; | |
691 | return dfs_region1; | |
692 | } | |
693 | ||
fb1fc7ad LR |
694 | /* |
695 | * Helper for regdom_intersect(), this does the real | |
696 | * mathematical intersection fun | |
697 | */ | |
97524820 JD |
698 | static int reg_rules_intersect(const struct ieee80211_regdomain *rd1, |
699 | const struct ieee80211_regdomain *rd2, | |
700 | const struct ieee80211_reg_rule *rule1, | |
1a919318 JB |
701 | const struct ieee80211_reg_rule *rule2, |
702 | struct ieee80211_reg_rule *intersected_rule) | |
9c96477d LR |
703 | { |
704 | const struct ieee80211_freq_range *freq_range1, *freq_range2; | |
705 | struct ieee80211_freq_range *freq_range; | |
706 | const struct ieee80211_power_rule *power_rule1, *power_rule2; | |
707 | struct ieee80211_power_rule *power_rule; | |
97524820 | 708 | u32 freq_diff, max_bandwidth1, max_bandwidth2; |
9c96477d LR |
709 | |
710 | freq_range1 = &rule1->freq_range; | |
711 | freq_range2 = &rule2->freq_range; | |
712 | freq_range = &intersected_rule->freq_range; | |
713 | ||
714 | power_rule1 = &rule1->power_rule; | |
715 | power_rule2 = &rule2->power_rule; | |
716 | power_rule = &intersected_rule->power_rule; | |
717 | ||
718 | freq_range->start_freq_khz = max(freq_range1->start_freq_khz, | |
1a919318 | 719 | freq_range2->start_freq_khz); |
9c96477d | 720 | freq_range->end_freq_khz = min(freq_range1->end_freq_khz, |
1a919318 | 721 | freq_range2->end_freq_khz); |
97524820 JD |
722 | |
723 | max_bandwidth1 = freq_range1->max_bandwidth_khz; | |
724 | max_bandwidth2 = freq_range2->max_bandwidth_khz; | |
725 | ||
b0dfd2ea JD |
726 | if (rule1->flags & NL80211_RRF_AUTO_BW) |
727 | max_bandwidth1 = reg_get_max_bandwidth(rd1, rule1); | |
728 | if (rule2->flags & NL80211_RRF_AUTO_BW) | |
729 | max_bandwidth2 = reg_get_max_bandwidth(rd2, rule2); | |
97524820 JD |
730 | |
731 | freq_range->max_bandwidth_khz = min(max_bandwidth1, max_bandwidth2); | |
9c96477d | 732 | |
b0dfd2ea JD |
733 | intersected_rule->flags = rule1->flags | rule2->flags; |
734 | ||
735 | /* | |
736 | * In case NL80211_RRF_AUTO_BW requested for both rules | |
737 | * set AUTO_BW in intersected rule also. Next we will | |
738 | * calculate BW correctly in handle_channel function. | |
739 | * In other case remove AUTO_BW flag while we calculate | |
740 | * maximum bandwidth correctly and auto calculation is | |
741 | * not required. | |
742 | */ | |
743 | if ((rule1->flags & NL80211_RRF_AUTO_BW) && | |
744 | (rule2->flags & NL80211_RRF_AUTO_BW)) | |
745 | intersected_rule->flags |= NL80211_RRF_AUTO_BW; | |
746 | else | |
747 | intersected_rule->flags &= ~NL80211_RRF_AUTO_BW; | |
748 | ||
9c96477d LR |
749 | freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz; |
750 | if (freq_range->max_bandwidth_khz > freq_diff) | |
751 | freq_range->max_bandwidth_khz = freq_diff; | |
752 | ||
753 | power_rule->max_eirp = min(power_rule1->max_eirp, | |
754 | power_rule2->max_eirp); | |
755 | power_rule->max_antenna_gain = min(power_rule1->max_antenna_gain, | |
756 | power_rule2->max_antenna_gain); | |
757 | ||
9c96477d LR |
758 | if (!is_valid_reg_rule(intersected_rule)) |
759 | return -EINVAL; | |
760 | ||
761 | return 0; | |
762 | } | |
763 | ||
764 | /** | |
765 | * regdom_intersect - do the intersection between two regulatory domains | |
766 | * @rd1: first regulatory domain | |
767 | * @rd2: second regulatory domain | |
768 | * | |
769 | * Use this function to get the intersection between two regulatory domains. | |
770 | * Once completed we will mark the alpha2 for the rd as intersected, "98", | |
771 | * as no one single alpha2 can represent this regulatory domain. | |
772 | * | |
773 | * Returns a pointer to the regulatory domain structure which will hold the | |
774 | * resulting intersection of rules between rd1 and rd2. We will | |
775 | * kzalloc() this structure for you. | |
776 | */ | |
1a919318 JB |
777 | static struct ieee80211_regdomain * |
778 | regdom_intersect(const struct ieee80211_regdomain *rd1, | |
779 | const struct ieee80211_regdomain *rd2) | |
9c96477d LR |
780 | { |
781 | int r, size_of_regd; | |
782 | unsigned int x, y; | |
783 | unsigned int num_rules = 0, rule_idx = 0; | |
784 | const struct ieee80211_reg_rule *rule1, *rule2; | |
785 | struct ieee80211_reg_rule *intersected_rule; | |
786 | struct ieee80211_regdomain *rd; | |
787 | /* This is just a dummy holder to help us count */ | |
74f53cd8 | 788 | struct ieee80211_reg_rule dummy_rule; |
9c96477d LR |
789 | |
790 | if (!rd1 || !rd2) | |
791 | return NULL; | |
792 | ||
fb1fc7ad LR |
793 | /* |
794 | * First we get a count of the rules we'll need, then we actually | |
9c96477d LR |
795 | * build them. This is to so we can malloc() and free() a |
796 | * regdomain once. The reason we use reg_rules_intersect() here | |
797 | * is it will return -EINVAL if the rule computed makes no sense. | |
fb1fc7ad LR |
798 | * All rules that do check out OK are valid. |
799 | */ | |
9c96477d LR |
800 | |
801 | for (x = 0; x < rd1->n_reg_rules; x++) { | |
802 | rule1 = &rd1->reg_rules[x]; | |
803 | for (y = 0; y < rd2->n_reg_rules; y++) { | |
804 | rule2 = &rd2->reg_rules[y]; | |
97524820 JD |
805 | if (!reg_rules_intersect(rd1, rd2, rule1, rule2, |
806 | &dummy_rule)) | |
9c96477d | 807 | num_rules++; |
9c96477d LR |
808 | } |
809 | } | |
810 | ||
811 | if (!num_rules) | |
812 | return NULL; | |
813 | ||
814 | size_of_regd = sizeof(struct ieee80211_regdomain) + | |
82f20856 | 815 | num_rules * sizeof(struct ieee80211_reg_rule); |
9c96477d LR |
816 | |
817 | rd = kzalloc(size_of_regd, GFP_KERNEL); | |
818 | if (!rd) | |
819 | return NULL; | |
820 | ||
8a57fff0 | 821 | for (x = 0; x < rd1->n_reg_rules && rule_idx < num_rules; x++) { |
9c96477d | 822 | rule1 = &rd1->reg_rules[x]; |
8a57fff0 | 823 | for (y = 0; y < rd2->n_reg_rules && rule_idx < num_rules; y++) { |
9c96477d | 824 | rule2 = &rd2->reg_rules[y]; |
fb1fc7ad LR |
825 | /* |
826 | * This time around instead of using the stack lets | |
9c96477d | 827 | * write to the target rule directly saving ourselves |
fb1fc7ad LR |
828 | * a memcpy() |
829 | */ | |
9c96477d | 830 | intersected_rule = &rd->reg_rules[rule_idx]; |
97524820 JD |
831 | r = reg_rules_intersect(rd1, rd2, rule1, rule2, |
832 | intersected_rule); | |
fb1fc7ad LR |
833 | /* |
834 | * No need to memset here the intersected rule here as | |
835 | * we're not using the stack anymore | |
836 | */ | |
9c96477d LR |
837 | if (r) |
838 | continue; | |
839 | rule_idx++; | |
840 | } | |
841 | } | |
842 | ||
843 | if (rule_idx != num_rules) { | |
844 | kfree(rd); | |
845 | return NULL; | |
846 | } | |
847 | ||
848 | rd->n_reg_rules = num_rules; | |
849 | rd->alpha2[0] = '9'; | |
850 | rd->alpha2[1] = '8'; | |
adbfb058 LR |
851 | rd->dfs_region = reg_intersect_dfs_region(rd1->dfs_region, |
852 | rd2->dfs_region); | |
9c96477d LR |
853 | |
854 | return rd; | |
855 | } | |
856 | ||
fb1fc7ad LR |
857 | /* |
858 | * XXX: add support for the rest of enum nl80211_reg_rule_flags, we may | |
859 | * want to just have the channel structure use these | |
860 | */ | |
b2e1b302 LR |
861 | static u32 map_regdom_flags(u32 rd_flags) |
862 | { | |
863 | u32 channel_flags = 0; | |
8fe02e16 LR |
864 | if (rd_flags & NL80211_RRF_NO_IR_ALL) |
865 | channel_flags |= IEEE80211_CHAN_NO_IR; | |
b2e1b302 LR |
866 | if (rd_flags & NL80211_RRF_DFS) |
867 | channel_flags |= IEEE80211_CHAN_RADAR; | |
03f6b084 SF |
868 | if (rd_flags & NL80211_RRF_NO_OFDM) |
869 | channel_flags |= IEEE80211_CHAN_NO_OFDM; | |
b2e1b302 LR |
870 | return channel_flags; |
871 | } | |
872 | ||
361c9c8b JB |
873 | static const struct ieee80211_reg_rule * |
874 | freq_reg_info_regd(struct wiphy *wiphy, u32 center_freq, | |
875 | const struct ieee80211_regdomain *regd) | |
8318d78a JB |
876 | { |
877 | int i; | |
0c7dc45d | 878 | bool band_rule_found = false; |
038659e7 LR |
879 | bool bw_fits = false; |
880 | ||
3e0c3ff3 | 881 | if (!regd) |
361c9c8b | 882 | return ERR_PTR(-EINVAL); |
b2e1b302 | 883 | |
3e0c3ff3 | 884 | for (i = 0; i < regd->n_reg_rules; i++) { |
b2e1b302 LR |
885 | const struct ieee80211_reg_rule *rr; |
886 | const struct ieee80211_freq_range *fr = NULL; | |
b2e1b302 | 887 | |
3e0c3ff3 | 888 | rr = ®d->reg_rules[i]; |
b2e1b302 | 889 | fr = &rr->freq_range; |
0c7dc45d | 890 | |
fb1fc7ad LR |
891 | /* |
892 | * We only need to know if one frequency rule was | |
0c7dc45d | 893 | * was in center_freq's band, that's enough, so lets |
fb1fc7ad LR |
894 | * not overwrite it once found |
895 | */ | |
0c7dc45d LR |
896 | if (!band_rule_found) |
897 | band_rule_found = freq_in_rule_band(fr, center_freq); | |
898 | ||
fe7ef5e9 | 899 | bw_fits = reg_does_bw_fit(fr, center_freq, MHZ_TO_KHZ(20)); |
0c7dc45d | 900 | |
361c9c8b JB |
901 | if (band_rule_found && bw_fits) |
902 | return rr; | |
8318d78a JB |
903 | } |
904 | ||
0c7dc45d | 905 | if (!band_rule_found) |
361c9c8b | 906 | return ERR_PTR(-ERANGE); |
0c7dc45d | 907 | |
361c9c8b | 908 | return ERR_PTR(-EINVAL); |
b2e1b302 LR |
909 | } |
910 | ||
361c9c8b JB |
911 | const struct ieee80211_reg_rule *freq_reg_info(struct wiphy *wiphy, |
912 | u32 center_freq) | |
1fa25e41 | 913 | { |
5d885b99 | 914 | const struct ieee80211_regdomain *regd; |
1a919318 | 915 | |
e3961af1 | 916 | regd = reg_get_regdomain(wiphy); |
5d885b99 | 917 | |
361c9c8b | 918 | return freq_reg_info_regd(wiphy, center_freq, regd); |
1fa25e41 | 919 | } |
4f366c5d | 920 | EXPORT_SYMBOL(freq_reg_info); |
b2e1b302 | 921 | |
034c6d6e | 922 | const char *reg_initiator_name(enum nl80211_reg_initiator initiator) |
926a0a09 LR |
923 | { |
924 | switch (initiator) { | |
925 | case NL80211_REGDOM_SET_BY_CORE: | |
034c6d6e | 926 | return "core"; |
926a0a09 | 927 | case NL80211_REGDOM_SET_BY_USER: |
034c6d6e | 928 | return "user"; |
926a0a09 | 929 | case NL80211_REGDOM_SET_BY_DRIVER: |
034c6d6e | 930 | return "driver"; |
926a0a09 | 931 | case NL80211_REGDOM_SET_BY_COUNTRY_IE: |
034c6d6e | 932 | return "country IE"; |
926a0a09 LR |
933 | default: |
934 | WARN_ON(1); | |
034c6d6e | 935 | return "bug"; |
926a0a09 LR |
936 | } |
937 | } | |
034c6d6e | 938 | EXPORT_SYMBOL(reg_initiator_name); |
e702d3cf | 939 | |
034c6d6e | 940 | #ifdef CONFIG_CFG80211_REG_DEBUG |
b0dfd2ea JD |
941 | static void chan_reg_rule_print_dbg(const struct ieee80211_regdomain *regd, |
942 | struct ieee80211_channel *chan, | |
e702d3cf LR |
943 | const struct ieee80211_reg_rule *reg_rule) |
944 | { | |
945 | const struct ieee80211_power_rule *power_rule; | |
946 | const struct ieee80211_freq_range *freq_range; | |
b0dfd2ea | 947 | char max_antenna_gain[32], bw[32]; |
e702d3cf LR |
948 | |
949 | power_rule = ®_rule->power_rule; | |
950 | freq_range = ®_rule->freq_range; | |
951 | ||
952 | if (!power_rule->max_antenna_gain) | |
b0dfd2ea | 953 | snprintf(max_antenna_gain, sizeof(max_antenna_gain), "N/A"); |
e702d3cf | 954 | else |
b0dfd2ea JD |
955 | snprintf(max_antenna_gain, sizeof(max_antenna_gain), "%d", |
956 | power_rule->max_antenna_gain); | |
957 | ||
958 | if (reg_rule->flags & NL80211_RRF_AUTO_BW) | |
959 | snprintf(bw, sizeof(bw), "%d KHz, %d KHz AUTO", | |
960 | freq_range->max_bandwidth_khz, | |
961 | reg_get_max_bandwidth(regd, reg_rule)); | |
962 | else | |
963 | snprintf(bw, sizeof(bw), "%d KHz", | |
964 | freq_range->max_bandwidth_khz); | |
e702d3cf | 965 | |
fe7ef5e9 JB |
966 | REG_DBG_PRINT("Updating information on frequency %d MHz with regulatory rule:\n", |
967 | chan->center_freq); | |
e702d3cf | 968 | |
b0dfd2ea | 969 | REG_DBG_PRINT("%d KHz - %d KHz @ %s), (%s mBi, %d mBm)\n", |
1a919318 | 970 | freq_range->start_freq_khz, freq_range->end_freq_khz, |
b0dfd2ea | 971 | bw, max_antenna_gain, |
e702d3cf LR |
972 | power_rule->max_eirp); |
973 | } | |
974 | #else | |
b0dfd2ea JD |
975 | static void chan_reg_rule_print_dbg(const struct ieee80211_regdomain *regd, |
976 | struct ieee80211_channel *chan, | |
e702d3cf LR |
977 | const struct ieee80211_reg_rule *reg_rule) |
978 | { | |
979 | return; | |
980 | } | |
926a0a09 LR |
981 | #endif |
982 | ||
038659e7 LR |
983 | /* |
984 | * Note that right now we assume the desired channel bandwidth | |
985 | * is always 20 MHz for each individual channel (HT40 uses 20 MHz | |
fe7ef5e9 | 986 | * per channel, the primary and the extension channel). |
038659e7 | 987 | */ |
7ca43d03 LR |
988 | static void handle_channel(struct wiphy *wiphy, |
989 | enum nl80211_reg_initiator initiator, | |
fdc9d7b2 | 990 | struct ieee80211_channel *chan) |
b2e1b302 | 991 | { |
038659e7 | 992 | u32 flags, bw_flags = 0; |
b2e1b302 LR |
993 | const struct ieee80211_reg_rule *reg_rule = NULL; |
994 | const struct ieee80211_power_rule *power_rule = NULL; | |
038659e7 | 995 | const struct ieee80211_freq_range *freq_range = NULL; |
fe33eb39 | 996 | struct wiphy *request_wiphy = NULL; |
c492db37 | 997 | struct regulatory_request *lr = get_last_request(); |
97524820 JD |
998 | const struct ieee80211_regdomain *regd; |
999 | u32 max_bandwidth_khz; | |
a92a3ce7 | 1000 | |
c492db37 | 1001 | request_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx); |
a92a3ce7 LR |
1002 | |
1003 | flags = chan->orig_flags; | |
b2e1b302 | 1004 | |
361c9c8b JB |
1005 | reg_rule = freq_reg_info(wiphy, MHZ_TO_KHZ(chan->center_freq)); |
1006 | if (IS_ERR(reg_rule)) { | |
ca4ffe8f LR |
1007 | /* |
1008 | * We will disable all channels that do not match our | |
25985edc | 1009 | * received regulatory rule unless the hint is coming |
ca4ffe8f LR |
1010 | * from a Country IE and the Country IE had no information |
1011 | * about a band. The IEEE 802.11 spec allows for an AP | |
1012 | * to send only a subset of the regulatory rules allowed, | |
1013 | * so an AP in the US that only supports 2.4 GHz may only send | |
1014 | * a country IE with information for the 2.4 GHz band | |
1015 | * while 5 GHz is still supported. | |
1016 | */ | |
1017 | if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE && | |
361c9c8b | 1018 | PTR_ERR(reg_rule) == -ERANGE) |
ca4ffe8f LR |
1019 | return; |
1020 | ||
cc493e4f LR |
1021 | if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER && |
1022 | request_wiphy && request_wiphy == wiphy && | |
a2f73b6c | 1023 | request_wiphy->regulatory_flags & REGULATORY_STRICT_REG) { |
cc493e4f LR |
1024 | REG_DBG_PRINT("Disabling freq %d MHz for good\n", |
1025 | chan->center_freq); | |
1026 | chan->orig_flags |= IEEE80211_CHAN_DISABLED; | |
1027 | chan->flags = chan->orig_flags; | |
1028 | } else { | |
1029 | REG_DBG_PRINT("Disabling freq %d MHz\n", | |
1030 | chan->center_freq); | |
1031 | chan->flags |= IEEE80211_CHAN_DISABLED; | |
1032 | } | |
8318d78a | 1033 | return; |
ca4ffe8f | 1034 | } |
8318d78a | 1035 | |
b0dfd2ea JD |
1036 | regd = reg_get_regdomain(wiphy); |
1037 | chan_reg_rule_print_dbg(regd, chan, reg_rule); | |
e702d3cf | 1038 | |
b2e1b302 | 1039 | power_rule = ®_rule->power_rule; |
038659e7 LR |
1040 | freq_range = ®_rule->freq_range; |
1041 | ||
97524820 JD |
1042 | max_bandwidth_khz = freq_range->max_bandwidth_khz; |
1043 | /* Check if auto calculation requested */ | |
b0dfd2ea | 1044 | if (reg_rule->flags & NL80211_RRF_AUTO_BW) |
97524820 | 1045 | max_bandwidth_khz = reg_get_max_bandwidth(regd, reg_rule); |
97524820 JD |
1046 | |
1047 | if (max_bandwidth_khz < MHZ_TO_KHZ(40)) | |
038659e7 | 1048 | bw_flags = IEEE80211_CHAN_NO_HT40; |
97524820 | 1049 | if (max_bandwidth_khz < MHZ_TO_KHZ(80)) |
c7a6ee27 | 1050 | bw_flags |= IEEE80211_CHAN_NO_80MHZ; |
97524820 | 1051 | if (max_bandwidth_khz < MHZ_TO_KHZ(160)) |
c7a6ee27 | 1052 | bw_flags |= IEEE80211_CHAN_NO_160MHZ; |
b2e1b302 | 1053 | |
c492db37 | 1054 | if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER && |
806a9e39 | 1055 | request_wiphy && request_wiphy == wiphy && |
a2f73b6c | 1056 | request_wiphy->regulatory_flags & REGULATORY_STRICT_REG) { |
fb1fc7ad | 1057 | /* |
25985edc | 1058 | * This guarantees the driver's requested regulatory domain |
f976376d | 1059 | * will always be used as a base for further regulatory |
fb1fc7ad LR |
1060 | * settings |
1061 | */ | |
f976376d | 1062 | chan->flags = chan->orig_flags = |
038659e7 | 1063 | map_regdom_flags(reg_rule->flags) | bw_flags; |
f976376d LR |
1064 | chan->max_antenna_gain = chan->orig_mag = |
1065 | (int) MBI_TO_DBI(power_rule->max_antenna_gain); | |
279f0f55 | 1066 | chan->max_reg_power = chan->max_power = chan->orig_mpwr = |
f976376d LR |
1067 | (int) MBM_TO_DBM(power_rule->max_eirp); |
1068 | return; | |
1069 | } | |
1070 | ||
04f39047 SW |
1071 | chan->dfs_state = NL80211_DFS_USABLE; |
1072 | chan->dfs_state_entered = jiffies; | |
1073 | ||
aa3d7eef | 1074 | chan->beacon_found = false; |
038659e7 | 1075 | chan->flags = flags | bw_flags | map_regdom_flags(reg_rule->flags); |
1a919318 JB |
1076 | chan->max_antenna_gain = |
1077 | min_t(int, chan->orig_mag, | |
1078 | MBI_TO_DBI(power_rule->max_antenna_gain)); | |
eccc068e | 1079 | chan->max_reg_power = (int) MBM_TO_DBM(power_rule->max_eirp); |
5e31fc08 SG |
1080 | if (chan->orig_mpwr) { |
1081 | /* | |
a09a85a0 LR |
1082 | * Devices that use REGULATORY_COUNTRY_IE_FOLLOW_POWER |
1083 | * will always follow the passed country IE power settings. | |
5e31fc08 SG |
1084 | */ |
1085 | if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE && | |
a09a85a0 | 1086 | wiphy->regulatory_flags & REGULATORY_COUNTRY_IE_FOLLOW_POWER) |
5e31fc08 SG |
1087 | chan->max_power = chan->max_reg_power; |
1088 | else | |
1089 | chan->max_power = min(chan->orig_mpwr, | |
1090 | chan->max_reg_power); | |
1091 | } else | |
1092 | chan->max_power = chan->max_reg_power; | |
8318d78a JB |
1093 | } |
1094 | ||
7ca43d03 | 1095 | static void handle_band(struct wiphy *wiphy, |
fdc9d7b2 JB |
1096 | enum nl80211_reg_initiator initiator, |
1097 | struct ieee80211_supported_band *sband) | |
8318d78a | 1098 | { |
a92a3ce7 | 1099 | unsigned int i; |
a92a3ce7 | 1100 | |
fdc9d7b2 JB |
1101 | if (!sband) |
1102 | return; | |
8318d78a JB |
1103 | |
1104 | for (i = 0; i < sband->n_channels; i++) | |
fdc9d7b2 | 1105 | handle_channel(wiphy, initiator, &sband->channels[i]); |
8318d78a JB |
1106 | } |
1107 | ||
57b5ce07 LR |
1108 | static bool reg_request_cell_base(struct regulatory_request *request) |
1109 | { | |
1110 | if (request->initiator != NL80211_REGDOM_SET_BY_USER) | |
1111 | return false; | |
1a919318 | 1112 | return request->user_reg_hint_type == NL80211_USER_REG_HINT_CELL_BASE; |
57b5ce07 LR |
1113 | } |
1114 | ||
1115 | bool reg_last_request_cell_base(void) | |
1116 | { | |
38fd2143 | 1117 | return reg_request_cell_base(get_last_request()); |
57b5ce07 LR |
1118 | } |
1119 | ||
1120 | #ifdef CONFIG_CFG80211_CERTIFICATION_ONUS | |
57b5ce07 | 1121 | /* Core specific check */ |
2f92212b JB |
1122 | static enum reg_request_treatment |
1123 | reg_ignore_cell_hint(struct regulatory_request *pending_request) | |
57b5ce07 | 1124 | { |
c492db37 JB |
1125 | struct regulatory_request *lr = get_last_request(); |
1126 | ||
57b5ce07 | 1127 | if (!reg_num_devs_support_basehint) |
2f92212b | 1128 | return REG_REQ_IGNORE; |
57b5ce07 | 1129 | |
c492db37 | 1130 | if (reg_request_cell_base(lr) && |
1a919318 | 1131 | !regdom_changes(pending_request->alpha2)) |
2f92212b | 1132 | return REG_REQ_ALREADY_SET; |
1a919318 | 1133 | |
2f92212b | 1134 | return REG_REQ_OK; |
57b5ce07 LR |
1135 | } |
1136 | ||
1137 | /* Device specific check */ | |
1138 | static bool reg_dev_ignore_cell_hint(struct wiphy *wiphy) | |
1139 | { | |
1a919318 | 1140 | return !(wiphy->features & NL80211_FEATURE_CELL_BASE_REG_HINTS); |
57b5ce07 LR |
1141 | } |
1142 | #else | |
1143 | static int reg_ignore_cell_hint(struct regulatory_request *pending_request) | |
1144 | { | |
2f92212b | 1145 | return REG_REQ_IGNORE; |
57b5ce07 | 1146 | } |
1a919318 JB |
1147 | |
1148 | static bool reg_dev_ignore_cell_hint(struct wiphy *wiphy) | |
57b5ce07 LR |
1149 | { |
1150 | return true; | |
1151 | } | |
1152 | #endif | |
1153 | ||
fa1fb9cb LR |
1154 | static bool wiphy_strict_alpha2_regd(struct wiphy *wiphy) |
1155 | { | |
a2f73b6c LR |
1156 | if (wiphy->regulatory_flags & REGULATORY_STRICT_REG && |
1157 | !(wiphy->regulatory_flags & REGULATORY_CUSTOM_REG)) | |
fa1fb9cb LR |
1158 | return true; |
1159 | return false; | |
1160 | } | |
57b5ce07 | 1161 | |
7db90f4a LR |
1162 | static bool ignore_reg_update(struct wiphy *wiphy, |
1163 | enum nl80211_reg_initiator initiator) | |
14b9815a | 1164 | { |
c492db37 JB |
1165 | struct regulatory_request *lr = get_last_request(); |
1166 | ||
1167 | if (!lr) { | |
034c6d6e LR |
1168 | REG_DBG_PRINT("Ignoring regulatory request set by %s " |
1169 | "since last_request is not set\n", | |
926a0a09 | 1170 | reg_initiator_name(initiator)); |
14b9815a | 1171 | return true; |
926a0a09 LR |
1172 | } |
1173 | ||
7db90f4a | 1174 | if (initiator == NL80211_REGDOM_SET_BY_CORE && |
a2f73b6c | 1175 | wiphy->regulatory_flags & REGULATORY_CUSTOM_REG) { |
034c6d6e LR |
1176 | REG_DBG_PRINT("Ignoring regulatory request set by %s " |
1177 | "since the driver uses its own custom " | |
1178 | "regulatory domain\n", | |
926a0a09 | 1179 | reg_initiator_name(initiator)); |
14b9815a | 1180 | return true; |
926a0a09 LR |
1181 | } |
1182 | ||
fb1fc7ad LR |
1183 | /* |
1184 | * wiphy->regd will be set once the device has its own | |
1185 | * desired regulatory domain set | |
1186 | */ | |
fa1fb9cb | 1187 | if (wiphy_strict_alpha2_regd(wiphy) && !wiphy->regd && |
749b527b | 1188 | initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && |
c492db37 | 1189 | !is_world_regdom(lr->alpha2)) { |
034c6d6e LR |
1190 | REG_DBG_PRINT("Ignoring regulatory request set by %s " |
1191 | "since the driver requires its own regulatory " | |
1192 | "domain to be set first\n", | |
926a0a09 | 1193 | reg_initiator_name(initiator)); |
14b9815a | 1194 | return true; |
926a0a09 LR |
1195 | } |
1196 | ||
c492db37 | 1197 | if (reg_request_cell_base(lr)) |
57b5ce07 LR |
1198 | return reg_dev_ignore_cell_hint(wiphy); |
1199 | ||
14b9815a LR |
1200 | return false; |
1201 | } | |
1202 | ||
3195e489 LR |
1203 | static bool reg_is_world_roaming(struct wiphy *wiphy) |
1204 | { | |
1205 | const struct ieee80211_regdomain *cr = get_cfg80211_regdom(); | |
1206 | const struct ieee80211_regdomain *wr = get_wiphy_regdom(wiphy); | |
1207 | struct regulatory_request *lr = get_last_request(); | |
1208 | ||
1209 | if (is_world_regdom(cr->alpha2) || (wr && is_world_regdom(wr->alpha2))) | |
1210 | return true; | |
1211 | ||
1212 | if (lr && lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && | |
a2f73b6c | 1213 | wiphy->regulatory_flags & REGULATORY_CUSTOM_REG) |
3195e489 LR |
1214 | return true; |
1215 | ||
1216 | return false; | |
1217 | } | |
1218 | ||
1a919318 | 1219 | static void handle_reg_beacon(struct wiphy *wiphy, unsigned int chan_idx, |
e38f8a7a LR |
1220 | struct reg_beacon *reg_beacon) |
1221 | { | |
e38f8a7a LR |
1222 | struct ieee80211_supported_band *sband; |
1223 | struct ieee80211_channel *chan; | |
6bad8766 LR |
1224 | bool channel_changed = false; |
1225 | struct ieee80211_channel chan_before; | |
e38f8a7a | 1226 | |
e38f8a7a LR |
1227 | sband = wiphy->bands[reg_beacon->chan.band]; |
1228 | chan = &sband->channels[chan_idx]; | |
1229 | ||
1230 | if (likely(chan->center_freq != reg_beacon->chan.center_freq)) | |
1231 | return; | |
1232 | ||
6bad8766 LR |
1233 | if (chan->beacon_found) |
1234 | return; | |
1235 | ||
1236 | chan->beacon_found = true; | |
1237 | ||
0f500a5f LR |
1238 | if (!reg_is_world_roaming(wiphy)) |
1239 | return; | |
1240 | ||
a2f73b6c | 1241 | if (wiphy->regulatory_flags & REGULATORY_DISABLE_BEACON_HINTS) |
37184244 LR |
1242 | return; |
1243 | ||
6bad8766 LR |
1244 | chan_before.center_freq = chan->center_freq; |
1245 | chan_before.flags = chan->flags; | |
1246 | ||
8fe02e16 LR |
1247 | if (chan->flags & IEEE80211_CHAN_NO_IR) { |
1248 | chan->flags &= ~IEEE80211_CHAN_NO_IR; | |
6bad8766 | 1249 | channel_changed = true; |
e38f8a7a LR |
1250 | } |
1251 | ||
6bad8766 LR |
1252 | if (channel_changed) |
1253 | nl80211_send_beacon_hint_event(wiphy, &chan_before, chan); | |
e38f8a7a LR |
1254 | } |
1255 | ||
1256 | /* | |
1257 | * Called when a scan on a wiphy finds a beacon on | |
1258 | * new channel | |
1259 | */ | |
1260 | static void wiphy_update_new_beacon(struct wiphy *wiphy, | |
1261 | struct reg_beacon *reg_beacon) | |
1262 | { | |
1263 | unsigned int i; | |
1264 | struct ieee80211_supported_band *sband; | |
1265 | ||
e38f8a7a LR |
1266 | if (!wiphy->bands[reg_beacon->chan.band]) |
1267 | return; | |
1268 | ||
1269 | sband = wiphy->bands[reg_beacon->chan.band]; | |
1270 | ||
1271 | for (i = 0; i < sband->n_channels; i++) | |
1272 | handle_reg_beacon(wiphy, i, reg_beacon); | |
1273 | } | |
1274 | ||
1275 | /* | |
1276 | * Called upon reg changes or a new wiphy is added | |
1277 | */ | |
1278 | static void wiphy_update_beacon_reg(struct wiphy *wiphy) | |
1279 | { | |
1280 | unsigned int i; | |
1281 | struct ieee80211_supported_band *sband; | |
1282 | struct reg_beacon *reg_beacon; | |
1283 | ||
e38f8a7a LR |
1284 | list_for_each_entry(reg_beacon, ®_beacon_list, list) { |
1285 | if (!wiphy->bands[reg_beacon->chan.band]) | |
1286 | continue; | |
1287 | sband = wiphy->bands[reg_beacon->chan.band]; | |
1288 | for (i = 0; i < sband->n_channels; i++) | |
1289 | handle_reg_beacon(wiphy, i, reg_beacon); | |
1290 | } | |
1291 | } | |
1292 | ||
e38f8a7a LR |
1293 | /* Reap the advantages of previously found beacons */ |
1294 | static void reg_process_beacons(struct wiphy *wiphy) | |
1295 | { | |
b1ed8ddd LR |
1296 | /* |
1297 | * Means we are just firing up cfg80211, so no beacons would | |
1298 | * have been processed yet. | |
1299 | */ | |
1300 | if (!last_request) | |
1301 | return; | |
e38f8a7a LR |
1302 | wiphy_update_beacon_reg(wiphy); |
1303 | } | |
1304 | ||
1a919318 | 1305 | static bool is_ht40_allowed(struct ieee80211_channel *chan) |
038659e7 LR |
1306 | { |
1307 | if (!chan) | |
1a919318 | 1308 | return false; |
038659e7 | 1309 | if (chan->flags & IEEE80211_CHAN_DISABLED) |
1a919318 | 1310 | return false; |
038659e7 | 1311 | /* This would happen when regulatory rules disallow HT40 completely */ |
55b183ad FF |
1312 | if ((chan->flags & IEEE80211_CHAN_NO_HT40) == IEEE80211_CHAN_NO_HT40) |
1313 | return false; | |
1314 | return true; | |
038659e7 LR |
1315 | } |
1316 | ||
1317 | static void reg_process_ht_flags_channel(struct wiphy *wiphy, | |
fdc9d7b2 | 1318 | struct ieee80211_channel *channel) |
038659e7 | 1319 | { |
fdc9d7b2 | 1320 | struct ieee80211_supported_band *sband = wiphy->bands[channel->band]; |
038659e7 LR |
1321 | struct ieee80211_channel *channel_before = NULL, *channel_after = NULL; |
1322 | unsigned int i; | |
1323 | ||
1a919318 | 1324 | if (!is_ht40_allowed(channel)) { |
038659e7 LR |
1325 | channel->flags |= IEEE80211_CHAN_NO_HT40; |
1326 | return; | |
1327 | } | |
1328 | ||
1329 | /* | |
1330 | * We need to ensure the extension channels exist to | |
1331 | * be able to use HT40- or HT40+, this finds them (or not) | |
1332 | */ | |
1333 | for (i = 0; i < sband->n_channels; i++) { | |
1334 | struct ieee80211_channel *c = &sband->channels[i]; | |
1a919318 | 1335 | |
038659e7 LR |
1336 | if (c->center_freq == (channel->center_freq - 20)) |
1337 | channel_before = c; | |
1338 | if (c->center_freq == (channel->center_freq + 20)) | |
1339 | channel_after = c; | |
1340 | } | |
1341 | ||
1342 | /* | |
1343 | * Please note that this assumes target bandwidth is 20 MHz, | |
1344 | * if that ever changes we also need to change the below logic | |
1345 | * to include that as well. | |
1346 | */ | |
1a919318 | 1347 | if (!is_ht40_allowed(channel_before)) |
689da1b3 | 1348 | channel->flags |= IEEE80211_CHAN_NO_HT40MINUS; |
038659e7 | 1349 | else |
689da1b3 | 1350 | channel->flags &= ~IEEE80211_CHAN_NO_HT40MINUS; |
038659e7 | 1351 | |
1a919318 | 1352 | if (!is_ht40_allowed(channel_after)) |
689da1b3 | 1353 | channel->flags |= IEEE80211_CHAN_NO_HT40PLUS; |
038659e7 | 1354 | else |
689da1b3 | 1355 | channel->flags &= ~IEEE80211_CHAN_NO_HT40PLUS; |
038659e7 LR |
1356 | } |
1357 | ||
1358 | static void reg_process_ht_flags_band(struct wiphy *wiphy, | |
fdc9d7b2 | 1359 | struct ieee80211_supported_band *sband) |
038659e7 LR |
1360 | { |
1361 | unsigned int i; | |
038659e7 | 1362 | |
fdc9d7b2 JB |
1363 | if (!sband) |
1364 | return; | |
038659e7 LR |
1365 | |
1366 | for (i = 0; i < sband->n_channels; i++) | |
fdc9d7b2 | 1367 | reg_process_ht_flags_channel(wiphy, &sband->channels[i]); |
038659e7 LR |
1368 | } |
1369 | ||
1370 | static void reg_process_ht_flags(struct wiphy *wiphy) | |
1371 | { | |
1372 | enum ieee80211_band band; | |
1373 | ||
1374 | if (!wiphy) | |
1375 | return; | |
1376 | ||
fdc9d7b2 JB |
1377 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) |
1378 | reg_process_ht_flags_band(wiphy, wiphy->bands[band]); | |
038659e7 LR |
1379 | } |
1380 | ||
0e3802db LR |
1381 | static void reg_call_notifier(struct wiphy *wiphy, |
1382 | struct regulatory_request *request) | |
1383 | { | |
1384 | if (wiphy->reg_notifier) | |
1385 | wiphy->reg_notifier(wiphy, request); | |
1386 | } | |
1387 | ||
eac03e38 SN |
1388 | static void wiphy_update_regulatory(struct wiphy *wiphy, |
1389 | enum nl80211_reg_initiator initiator) | |
b2e1b302 LR |
1390 | { |
1391 | enum ieee80211_band band; | |
c492db37 | 1392 | struct regulatory_request *lr = get_last_request(); |
eac03e38 | 1393 | |
0e3802db LR |
1394 | if (ignore_reg_update(wiphy, initiator)) { |
1395 | /* | |
1396 | * Regulatory updates set by CORE are ignored for custom | |
1397 | * regulatory cards. Let us notify the changes to the driver, | |
1398 | * as some drivers used this to restore its orig_* reg domain. | |
1399 | */ | |
1400 | if (initiator == NL80211_REGDOM_SET_BY_CORE && | |
a2f73b6c | 1401 | wiphy->regulatory_flags & REGULATORY_CUSTOM_REG) |
0e3802db | 1402 | reg_call_notifier(wiphy, lr); |
a203c2aa | 1403 | return; |
0e3802db | 1404 | } |
a203c2aa | 1405 | |
c492db37 | 1406 | lr->dfs_region = get_cfg80211_regdom()->dfs_region; |
b68e6b3b | 1407 | |
fdc9d7b2 JB |
1408 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) |
1409 | handle_band(wiphy, initiator, wiphy->bands[band]); | |
a203c2aa | 1410 | |
e38f8a7a | 1411 | reg_process_beacons(wiphy); |
038659e7 | 1412 | reg_process_ht_flags(wiphy); |
0e3802db | 1413 | reg_call_notifier(wiphy, lr); |
b2e1b302 LR |
1414 | } |
1415 | ||
d7549cbb SN |
1416 | static void update_all_wiphy_regulatory(enum nl80211_reg_initiator initiator) |
1417 | { | |
1418 | struct cfg80211_registered_device *rdev; | |
4a38994f | 1419 | struct wiphy *wiphy; |
d7549cbb | 1420 | |
5fe231e8 | 1421 | ASSERT_RTNL(); |
458f4f9e | 1422 | |
4a38994f RM |
1423 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) { |
1424 | wiphy = &rdev->wiphy; | |
1425 | wiphy_update_regulatory(wiphy, initiator); | |
4a38994f | 1426 | } |
d7549cbb SN |
1427 | } |
1428 | ||
1fa25e41 | 1429 | static void handle_channel_custom(struct wiphy *wiphy, |
fdc9d7b2 | 1430 | struct ieee80211_channel *chan, |
1fa25e41 LR |
1431 | const struct ieee80211_regdomain *regd) |
1432 | { | |
038659e7 | 1433 | u32 bw_flags = 0; |
1fa25e41 LR |
1434 | const struct ieee80211_reg_rule *reg_rule = NULL; |
1435 | const struct ieee80211_power_rule *power_rule = NULL; | |
038659e7 | 1436 | const struct ieee80211_freq_range *freq_range = NULL; |
97524820 | 1437 | u32 max_bandwidth_khz; |
ac46d48e | 1438 | |
361c9c8b JB |
1439 | reg_rule = freq_reg_info_regd(wiphy, MHZ_TO_KHZ(chan->center_freq), |
1440 | regd); | |
1fa25e41 | 1441 | |
361c9c8b | 1442 | if (IS_ERR(reg_rule)) { |
fe7ef5e9 JB |
1443 | REG_DBG_PRINT("Disabling freq %d MHz as custom regd has no rule that fits it\n", |
1444 | chan->center_freq); | |
cc493e4f LR |
1445 | chan->orig_flags |= IEEE80211_CHAN_DISABLED; |
1446 | chan->flags = chan->orig_flags; | |
1fa25e41 LR |
1447 | return; |
1448 | } | |
1449 | ||
b0dfd2ea | 1450 | chan_reg_rule_print_dbg(regd, chan, reg_rule); |
e702d3cf | 1451 | |
1fa25e41 | 1452 | power_rule = ®_rule->power_rule; |
038659e7 LR |
1453 | freq_range = ®_rule->freq_range; |
1454 | ||
97524820 JD |
1455 | max_bandwidth_khz = freq_range->max_bandwidth_khz; |
1456 | /* Check if auto calculation requested */ | |
b0dfd2ea | 1457 | if (reg_rule->flags & NL80211_RRF_AUTO_BW) |
97524820 JD |
1458 | max_bandwidth_khz = reg_get_max_bandwidth(regd, reg_rule); |
1459 | ||
1460 | if (max_bandwidth_khz < MHZ_TO_KHZ(40)) | |
038659e7 | 1461 | bw_flags = IEEE80211_CHAN_NO_HT40; |
97524820 | 1462 | if (max_bandwidth_khz < MHZ_TO_KHZ(80)) |
c7a6ee27 | 1463 | bw_flags |= IEEE80211_CHAN_NO_80MHZ; |
97524820 | 1464 | if (max_bandwidth_khz < MHZ_TO_KHZ(160)) |
c7a6ee27 | 1465 | bw_flags |= IEEE80211_CHAN_NO_160MHZ; |
1fa25e41 | 1466 | |
038659e7 | 1467 | chan->flags |= map_regdom_flags(reg_rule->flags) | bw_flags; |
1fa25e41 | 1468 | chan->max_antenna_gain = (int) MBI_TO_DBI(power_rule->max_antenna_gain); |
279f0f55 FF |
1469 | chan->max_reg_power = chan->max_power = |
1470 | (int) MBM_TO_DBM(power_rule->max_eirp); | |
1fa25e41 LR |
1471 | } |
1472 | ||
fdc9d7b2 JB |
1473 | static void handle_band_custom(struct wiphy *wiphy, |
1474 | struct ieee80211_supported_band *sband, | |
1fa25e41 LR |
1475 | const struct ieee80211_regdomain *regd) |
1476 | { | |
1477 | unsigned int i; | |
1fa25e41 | 1478 | |
fdc9d7b2 JB |
1479 | if (!sband) |
1480 | return; | |
1fa25e41 LR |
1481 | |
1482 | for (i = 0; i < sband->n_channels; i++) | |
fdc9d7b2 | 1483 | handle_channel_custom(wiphy, &sband->channels[i], regd); |
1fa25e41 LR |
1484 | } |
1485 | ||
1486 | /* Used by drivers prior to wiphy registration */ | |
1487 | void wiphy_apply_custom_regulatory(struct wiphy *wiphy, | |
1488 | const struct ieee80211_regdomain *regd) | |
1489 | { | |
1490 | enum ieee80211_band band; | |
bbcf3f02 | 1491 | unsigned int bands_set = 0; |
ac46d48e | 1492 | |
a2f73b6c LR |
1493 | WARN(!(wiphy->regulatory_flags & REGULATORY_CUSTOM_REG), |
1494 | "wiphy should have REGULATORY_CUSTOM_REG\n"); | |
1495 | wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG; | |
222ea581 | 1496 | |
1fa25e41 | 1497 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) { |
bbcf3f02 LR |
1498 | if (!wiphy->bands[band]) |
1499 | continue; | |
fdc9d7b2 | 1500 | handle_band_custom(wiphy, wiphy->bands[band], regd); |
bbcf3f02 | 1501 | bands_set++; |
b2e1b302 | 1502 | } |
bbcf3f02 LR |
1503 | |
1504 | /* | |
1505 | * no point in calling this if it won't have any effect | |
1a919318 | 1506 | * on your device's supported bands. |
bbcf3f02 LR |
1507 | */ |
1508 | WARN_ON(!bands_set); | |
b2e1b302 | 1509 | } |
1fa25e41 LR |
1510 | EXPORT_SYMBOL(wiphy_apply_custom_regulatory); |
1511 | ||
b2e253cf LR |
1512 | static void reg_set_request_processed(void) |
1513 | { | |
1514 | bool need_more_processing = false; | |
c492db37 | 1515 | struct regulatory_request *lr = get_last_request(); |
b2e253cf | 1516 | |
c492db37 | 1517 | lr->processed = true; |
b2e253cf LR |
1518 | |
1519 | spin_lock(®_requests_lock); | |
1520 | if (!list_empty(®_requests_list)) | |
1521 | need_more_processing = true; | |
1522 | spin_unlock(®_requests_lock); | |
1523 | ||
c492db37 | 1524 | if (lr->initiator == NL80211_REGDOM_SET_BY_USER) |
fe20b39e | 1525 | cancel_delayed_work(®_timeout); |
a90c7a31 | 1526 | |
b2e253cf LR |
1527 | if (need_more_processing) |
1528 | schedule_work(®_work); | |
1529 | } | |
1530 | ||
b3eb7f3f LR |
1531 | /** |
1532 | * reg_process_hint_core - process core regulatory requests | |
1533 | * @pending_request: a pending core regulatory request | |
1534 | * | |
1535 | * The wireless subsystem can use this function to process | |
1536 | * a regulatory request issued by the regulatory core. | |
1537 | * | |
1538 | * Returns one of the different reg request treatment values. | |
1539 | */ | |
1540 | static enum reg_request_treatment | |
1541 | reg_process_hint_core(struct regulatory_request *core_request) | |
1542 | { | |
b3eb7f3f LR |
1543 | |
1544 | core_request->intersect = false; | |
1545 | core_request->processed = false; | |
5ad6ef5e | 1546 | |
05f1a3ea | 1547 | reg_update_last_request(core_request); |
b3eb7f3f | 1548 | |
fe6631ff | 1549 | return reg_call_crda(core_request); |
b3eb7f3f LR |
1550 | } |
1551 | ||
0d97a619 LR |
1552 | static enum reg_request_treatment |
1553 | __reg_process_hint_user(struct regulatory_request *user_request) | |
1554 | { | |
1555 | struct regulatory_request *lr = get_last_request(); | |
1556 | ||
1557 | if (reg_request_cell_base(user_request)) | |
1558 | return reg_ignore_cell_hint(user_request); | |
1559 | ||
1560 | if (reg_request_cell_base(lr)) | |
1561 | return REG_REQ_IGNORE; | |
1562 | ||
1563 | if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) | |
1564 | return REG_REQ_INTERSECT; | |
1565 | /* | |
1566 | * If the user knows better the user should set the regdom | |
1567 | * to their country before the IE is picked up | |
1568 | */ | |
1569 | if (lr->initiator == NL80211_REGDOM_SET_BY_USER && | |
1570 | lr->intersect) | |
1571 | return REG_REQ_IGNORE; | |
1572 | /* | |
1573 | * Process user requests only after previous user/driver/core | |
1574 | * requests have been processed | |
1575 | */ | |
1576 | if ((lr->initiator == NL80211_REGDOM_SET_BY_CORE || | |
1577 | lr->initiator == NL80211_REGDOM_SET_BY_DRIVER || | |
1578 | lr->initiator == NL80211_REGDOM_SET_BY_USER) && | |
1579 | regdom_changes(lr->alpha2)) | |
1580 | return REG_REQ_IGNORE; | |
1581 | ||
1582 | if (!regdom_changes(user_request->alpha2)) | |
1583 | return REG_REQ_ALREADY_SET; | |
1584 | ||
1585 | return REG_REQ_OK; | |
1586 | } | |
1587 | ||
1588 | /** | |
1589 | * reg_process_hint_user - process user regulatory requests | |
1590 | * @user_request: a pending user regulatory request | |
1591 | * | |
1592 | * The wireless subsystem can use this function to process | |
1593 | * a regulatory request initiated by userspace. | |
1594 | * | |
1595 | * Returns one of the different reg request treatment values. | |
1596 | */ | |
1597 | static enum reg_request_treatment | |
1598 | reg_process_hint_user(struct regulatory_request *user_request) | |
1599 | { | |
1600 | enum reg_request_treatment treatment; | |
0d97a619 LR |
1601 | |
1602 | treatment = __reg_process_hint_user(user_request); | |
1603 | if (treatment == REG_REQ_IGNORE || | |
1604 | treatment == REG_REQ_ALREADY_SET) { | |
1605 | kfree(user_request); | |
1606 | return treatment; | |
1607 | } | |
1608 | ||
0d97a619 LR |
1609 | user_request->intersect = treatment == REG_REQ_INTERSECT; |
1610 | user_request->processed = false; | |
5ad6ef5e | 1611 | |
05f1a3ea | 1612 | reg_update_last_request(user_request); |
0d97a619 LR |
1613 | |
1614 | user_alpha2[0] = user_request->alpha2[0]; | |
1615 | user_alpha2[1] = user_request->alpha2[1]; | |
1616 | ||
fe6631ff | 1617 | return reg_call_crda(user_request); |
0d97a619 LR |
1618 | } |
1619 | ||
21636c7f LR |
1620 | static enum reg_request_treatment |
1621 | __reg_process_hint_driver(struct regulatory_request *driver_request) | |
1622 | { | |
1623 | struct regulatory_request *lr = get_last_request(); | |
1624 | ||
1625 | if (lr->initiator == NL80211_REGDOM_SET_BY_CORE) { | |
1626 | if (regdom_changes(driver_request->alpha2)) | |
1627 | return REG_REQ_OK; | |
1628 | return REG_REQ_ALREADY_SET; | |
1629 | } | |
1630 | ||
1631 | /* | |
1632 | * This would happen if you unplug and plug your card | |
1633 | * back in or if you add a new device for which the previously | |
1634 | * loaded card also agrees on the regulatory domain. | |
1635 | */ | |
1636 | if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER && | |
1637 | !regdom_changes(driver_request->alpha2)) | |
1638 | return REG_REQ_ALREADY_SET; | |
1639 | ||
1640 | return REG_REQ_INTERSECT; | |
1641 | } | |
1642 | ||
1643 | /** | |
1644 | * reg_process_hint_driver - process driver regulatory requests | |
1645 | * @driver_request: a pending driver regulatory request | |
1646 | * | |
1647 | * The wireless subsystem can use this function to process | |
1648 | * a regulatory request issued by an 802.11 driver. | |
1649 | * | |
1650 | * Returns one of the different reg request treatment values. | |
1651 | */ | |
1652 | static enum reg_request_treatment | |
1653 | reg_process_hint_driver(struct wiphy *wiphy, | |
1654 | struct regulatory_request *driver_request) | |
1655 | { | |
1656 | const struct ieee80211_regdomain *regd; | |
1657 | enum reg_request_treatment treatment; | |
21636c7f LR |
1658 | |
1659 | treatment = __reg_process_hint_driver(driver_request); | |
1660 | ||
1661 | switch (treatment) { | |
1662 | case REG_REQ_OK: | |
1663 | break; | |
1664 | case REG_REQ_IGNORE: | |
1665 | kfree(driver_request); | |
1666 | return treatment; | |
1667 | case REG_REQ_INTERSECT: | |
1668 | /* fall through */ | |
1669 | case REG_REQ_ALREADY_SET: | |
1670 | regd = reg_copy_regd(get_cfg80211_regdom()); | |
1671 | if (IS_ERR(regd)) { | |
1672 | kfree(driver_request); | |
1673 | return REG_REQ_IGNORE; | |
1674 | } | |
1675 | rcu_assign_pointer(wiphy->regd, regd); | |
1676 | } | |
1677 | ||
21636c7f LR |
1678 | |
1679 | driver_request->intersect = treatment == REG_REQ_INTERSECT; | |
1680 | driver_request->processed = false; | |
5ad6ef5e | 1681 | |
05f1a3ea | 1682 | reg_update_last_request(driver_request); |
21636c7f LR |
1683 | |
1684 | /* | |
1685 | * Since CRDA will not be called in this case as we already | |
1686 | * have applied the requested regulatory domain before we just | |
1687 | * inform userspace we have processed the request | |
1688 | */ | |
1689 | if (treatment == REG_REQ_ALREADY_SET) { | |
1690 | nl80211_send_reg_change_event(driver_request); | |
1691 | reg_set_request_processed(); | |
1692 | return treatment; | |
1693 | } | |
1694 | ||
fe6631ff | 1695 | return reg_call_crda(driver_request); |
21636c7f LR |
1696 | } |
1697 | ||
b23e7a9e LR |
1698 | static enum reg_request_treatment |
1699 | __reg_process_hint_country_ie(struct wiphy *wiphy, | |
1700 | struct regulatory_request *country_ie_request) | |
1701 | { | |
1702 | struct wiphy *last_wiphy = NULL; | |
1703 | struct regulatory_request *lr = get_last_request(); | |
1704 | ||
1705 | if (reg_request_cell_base(lr)) { | |
1706 | /* Trust a Cell base station over the AP's country IE */ | |
1707 | if (regdom_changes(country_ie_request->alpha2)) | |
1708 | return REG_REQ_IGNORE; | |
1709 | return REG_REQ_ALREADY_SET; | |
2a901468 LR |
1710 | } else { |
1711 | if (wiphy->regulatory_flags & REGULATORY_COUNTRY_IE_IGNORE) | |
1712 | return REG_REQ_IGNORE; | |
b23e7a9e LR |
1713 | } |
1714 | ||
b23e7a9e LR |
1715 | if (unlikely(!is_an_alpha2(country_ie_request->alpha2))) |
1716 | return -EINVAL; | |
2f1c6c57 LR |
1717 | |
1718 | if (lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE) | |
1719 | return REG_REQ_OK; | |
1720 | ||
1721 | last_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx); | |
1722 | ||
1723 | if (last_wiphy != wiphy) { | |
b23e7a9e | 1724 | /* |
2f1c6c57 LR |
1725 | * Two cards with two APs claiming different |
1726 | * Country IE alpha2s. We could | |
1727 | * intersect them, but that seems unlikely | |
1728 | * to be correct. Reject second one for now. | |
b23e7a9e | 1729 | */ |
2f1c6c57 LR |
1730 | if (regdom_changes(country_ie_request->alpha2)) |
1731 | return REG_REQ_IGNORE; | |
b23e7a9e LR |
1732 | return REG_REQ_ALREADY_SET; |
1733 | } | |
2f1c6c57 LR |
1734 | /* |
1735 | * Two consecutive Country IE hints on the same wiphy. | |
1736 | * This should be picked up early by the driver/stack | |
1737 | */ | |
1738 | if (WARN_ON(regdom_changes(country_ie_request->alpha2))) | |
1739 | return REG_REQ_OK; | |
1740 | return REG_REQ_ALREADY_SET; | |
b23e7a9e LR |
1741 | } |
1742 | ||
d1c96a9a | 1743 | /** |
b23e7a9e LR |
1744 | * reg_process_hint_country_ie - process regulatory requests from country IEs |
1745 | * @country_ie_request: a regulatory request from a country IE | |
d1c96a9a | 1746 | * |
b23e7a9e LR |
1747 | * The wireless subsystem can use this function to process |
1748 | * a regulatory request issued by a country Information Element. | |
d1c96a9a | 1749 | * |
2f92212b | 1750 | * Returns one of the different reg request treatment values. |
d1c96a9a | 1751 | */ |
2f92212b | 1752 | static enum reg_request_treatment |
b23e7a9e LR |
1753 | reg_process_hint_country_ie(struct wiphy *wiphy, |
1754 | struct regulatory_request *country_ie_request) | |
b2e1b302 | 1755 | { |
2f92212b | 1756 | enum reg_request_treatment treatment; |
761cf7ec | 1757 | |
b23e7a9e | 1758 | treatment = __reg_process_hint_country_ie(wiphy, country_ie_request); |
9c96477d | 1759 | |
2f92212b | 1760 | switch (treatment) { |
2f92212b JB |
1761 | case REG_REQ_OK: |
1762 | break; | |
b23e7a9e LR |
1763 | case REG_REQ_IGNORE: |
1764 | /* fall through */ | |
1765 | case REG_REQ_ALREADY_SET: | |
1766 | kfree(country_ie_request); | |
1767 | return treatment; | |
1768 | case REG_REQ_INTERSECT: | |
1769 | kfree(country_ie_request); | |
fb1fc7ad | 1770 | /* |
b23e7a9e LR |
1771 | * This doesn't happen yet, not sure we |
1772 | * ever want to support it for this case. | |
fb1fc7ad | 1773 | */ |
b23e7a9e LR |
1774 | WARN_ONCE(1, "Unexpected intersection for country IEs"); |
1775 | return REG_REQ_IGNORE; | |
3e0c3ff3 | 1776 | } |
b2e1b302 | 1777 | |
b23e7a9e LR |
1778 | country_ie_request->intersect = false; |
1779 | country_ie_request->processed = false; | |
5ad6ef5e | 1780 | |
05f1a3ea | 1781 | reg_update_last_request(country_ie_request); |
3e0c3ff3 | 1782 | |
fe6631ff | 1783 | return reg_call_crda(country_ie_request); |
b2e1b302 LR |
1784 | } |
1785 | ||
30a548c7 | 1786 | /* This processes *all* regulatory hints */ |
1daa37c7 | 1787 | static void reg_process_hint(struct regulatory_request *reg_request) |
fe33eb39 | 1788 | { |
fe33eb39 | 1789 | struct wiphy *wiphy = NULL; |
b3eb7f3f | 1790 | enum reg_request_treatment treatment; |
fe33eb39 | 1791 | |
f4173766 | 1792 | if (reg_request->wiphy_idx != WIPHY_IDX_INVALID) |
fe33eb39 LR |
1793 | wiphy = wiphy_idx_to_wiphy(reg_request->wiphy_idx); |
1794 | ||
b3eb7f3f LR |
1795 | switch (reg_request->initiator) { |
1796 | case NL80211_REGDOM_SET_BY_CORE: | |
1797 | reg_process_hint_core(reg_request); | |
1798 | return; | |
1799 | case NL80211_REGDOM_SET_BY_USER: | |
0d97a619 LR |
1800 | treatment = reg_process_hint_user(reg_request); |
1801 | if (treatment == REG_REQ_OK || | |
1802 | treatment == REG_REQ_ALREADY_SET) | |
1803 | return; | |
845f3351 SD |
1804 | queue_delayed_work(system_power_efficient_wq, |
1805 | ®_timeout, msecs_to_jiffies(3142)); | |
0d97a619 | 1806 | return; |
b3eb7f3f | 1807 | case NL80211_REGDOM_SET_BY_DRIVER: |
772f0389 IP |
1808 | if (!wiphy) |
1809 | goto out_free; | |
21636c7f LR |
1810 | treatment = reg_process_hint_driver(wiphy, reg_request); |
1811 | break; | |
b3eb7f3f | 1812 | case NL80211_REGDOM_SET_BY_COUNTRY_IE: |
772f0389 IP |
1813 | if (!wiphy) |
1814 | goto out_free; | |
b23e7a9e | 1815 | treatment = reg_process_hint_country_ie(wiphy, reg_request); |
b3eb7f3f LR |
1816 | break; |
1817 | default: | |
1818 | WARN(1, "invalid initiator %d\n", reg_request->initiator); | |
772f0389 | 1819 | goto out_free; |
b3eb7f3f LR |
1820 | } |
1821 | ||
b23e7a9e LR |
1822 | /* This is required so that the orig_* parameters are saved */ |
1823 | if (treatment == REG_REQ_ALREADY_SET && wiphy && | |
a2f73b6c | 1824 | wiphy->regulatory_flags & REGULATORY_STRICT_REG) |
b23e7a9e | 1825 | wiphy_update_regulatory(wiphy, reg_request->initiator); |
772f0389 IP |
1826 | |
1827 | return; | |
1828 | ||
1829 | out_free: | |
1830 | kfree(reg_request); | |
fe33eb39 LR |
1831 | } |
1832 | ||
b2e253cf LR |
1833 | /* |
1834 | * Processes regulatory hints, this is all the NL80211_REGDOM_SET_BY_* | |
1835 | * Regulatory hints come on a first come first serve basis and we | |
1836 | * must process each one atomically. | |
1837 | */ | |
fe33eb39 | 1838 | static void reg_process_pending_hints(void) |
b0e2880b | 1839 | { |
c492db37 | 1840 | struct regulatory_request *reg_request, *lr; |
fe33eb39 | 1841 | |
c492db37 | 1842 | lr = get_last_request(); |
b0e2880b | 1843 | |
b2e253cf | 1844 | /* When last_request->processed becomes true this will be rescheduled */ |
c492db37 | 1845 | if (lr && !lr->processed) { |
1a919318 | 1846 | REG_DBG_PRINT("Pending regulatory request, waiting for it to be processed...\n"); |
5fe231e8 | 1847 | return; |
b2e253cf LR |
1848 | } |
1849 | ||
fe33eb39 | 1850 | spin_lock(®_requests_lock); |
fe33eb39 | 1851 | |
b2e253cf | 1852 | if (list_empty(®_requests_list)) { |
d951c1dd | 1853 | spin_unlock(®_requests_lock); |
5fe231e8 | 1854 | return; |
fe33eb39 | 1855 | } |
b2e253cf LR |
1856 | |
1857 | reg_request = list_first_entry(®_requests_list, | |
1858 | struct regulatory_request, | |
1859 | list); | |
1860 | list_del_init(®_request->list); | |
1861 | ||
fe33eb39 | 1862 | spin_unlock(®_requests_lock); |
b0e2880b | 1863 | |
1daa37c7 | 1864 | reg_process_hint(reg_request); |
fe33eb39 LR |
1865 | } |
1866 | ||
e38f8a7a LR |
1867 | /* Processes beacon hints -- this has nothing to do with country IEs */ |
1868 | static void reg_process_pending_beacon_hints(void) | |
1869 | { | |
79c97e97 | 1870 | struct cfg80211_registered_device *rdev; |
e38f8a7a LR |
1871 | struct reg_beacon *pending_beacon, *tmp; |
1872 | ||
e38f8a7a LR |
1873 | /* This goes through the _pending_ beacon list */ |
1874 | spin_lock_bh(®_pending_beacons_lock); | |
1875 | ||
e38f8a7a LR |
1876 | list_for_each_entry_safe(pending_beacon, tmp, |
1877 | ®_pending_beacons, list) { | |
e38f8a7a LR |
1878 | list_del_init(&pending_beacon->list); |
1879 | ||
1880 | /* Applies the beacon hint to current wiphys */ | |
79c97e97 JB |
1881 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) |
1882 | wiphy_update_new_beacon(&rdev->wiphy, pending_beacon); | |
e38f8a7a LR |
1883 | |
1884 | /* Remembers the beacon hint for new wiphys or reg changes */ | |
1885 | list_add_tail(&pending_beacon->list, ®_beacon_list); | |
1886 | } | |
1887 | ||
1888 | spin_unlock_bh(®_pending_beacons_lock); | |
e38f8a7a LR |
1889 | } |
1890 | ||
fe33eb39 LR |
1891 | static void reg_todo(struct work_struct *work) |
1892 | { | |
5fe231e8 | 1893 | rtnl_lock(); |
fe33eb39 | 1894 | reg_process_pending_hints(); |
e38f8a7a | 1895 | reg_process_pending_beacon_hints(); |
5fe231e8 | 1896 | rtnl_unlock(); |
fe33eb39 LR |
1897 | } |
1898 | ||
fe33eb39 LR |
1899 | static void queue_regulatory_request(struct regulatory_request *request) |
1900 | { | |
d4f2c881 JB |
1901 | request->alpha2[0] = toupper(request->alpha2[0]); |
1902 | request->alpha2[1] = toupper(request->alpha2[1]); | |
c61029c7 | 1903 | |
fe33eb39 LR |
1904 | spin_lock(®_requests_lock); |
1905 | list_add_tail(&request->list, ®_requests_list); | |
1906 | spin_unlock(®_requests_lock); | |
1907 | ||
1908 | schedule_work(®_work); | |
1909 | } | |
1910 | ||
09d989d1 LR |
1911 | /* |
1912 | * Core regulatory hint -- happens during cfg80211_init() | |
1913 | * and when we restore regulatory settings. | |
1914 | */ | |
ba25c141 LR |
1915 | static int regulatory_hint_core(const char *alpha2) |
1916 | { | |
1917 | struct regulatory_request *request; | |
1918 | ||
1a919318 | 1919 | request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); |
ba25c141 LR |
1920 | if (!request) |
1921 | return -ENOMEM; | |
1922 | ||
1923 | request->alpha2[0] = alpha2[0]; | |
1924 | request->alpha2[1] = alpha2[1]; | |
7db90f4a | 1925 | request->initiator = NL80211_REGDOM_SET_BY_CORE; |
ba25c141 | 1926 | |
31e99729 | 1927 | queue_regulatory_request(request); |
5078b2e3 | 1928 | |
fe33eb39 | 1929 | return 0; |
ba25c141 LR |
1930 | } |
1931 | ||
fe33eb39 | 1932 | /* User hints */ |
57b5ce07 LR |
1933 | int regulatory_hint_user(const char *alpha2, |
1934 | enum nl80211_user_reg_hint_type user_reg_hint_type) | |
b2e1b302 | 1935 | { |
fe33eb39 LR |
1936 | struct regulatory_request *request; |
1937 | ||
fdc9d7b2 JB |
1938 | if (WARN_ON(!alpha2)) |
1939 | return -EINVAL; | |
b2e1b302 | 1940 | |
fe33eb39 LR |
1941 | request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); |
1942 | if (!request) | |
1943 | return -ENOMEM; | |
1944 | ||
f4173766 | 1945 | request->wiphy_idx = WIPHY_IDX_INVALID; |
fe33eb39 LR |
1946 | request->alpha2[0] = alpha2[0]; |
1947 | request->alpha2[1] = alpha2[1]; | |
e12822e1 | 1948 | request->initiator = NL80211_REGDOM_SET_BY_USER; |
57b5ce07 | 1949 | request->user_reg_hint_type = user_reg_hint_type; |
fe33eb39 LR |
1950 | |
1951 | queue_regulatory_request(request); | |
1952 | ||
1953 | return 0; | |
1954 | } | |
1955 | ||
1956 | /* Driver hints */ | |
1957 | int regulatory_hint(struct wiphy *wiphy, const char *alpha2) | |
1958 | { | |
1959 | struct regulatory_request *request; | |
1960 | ||
fdc9d7b2 JB |
1961 | if (WARN_ON(!alpha2 || !wiphy)) |
1962 | return -EINVAL; | |
fe33eb39 | 1963 | |
4f7b9140 LR |
1964 | wiphy->regulatory_flags &= ~REGULATORY_CUSTOM_REG; |
1965 | ||
fe33eb39 LR |
1966 | request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); |
1967 | if (!request) | |
1968 | return -ENOMEM; | |
1969 | ||
1970 | request->wiphy_idx = get_wiphy_idx(wiphy); | |
1971 | ||
fe33eb39 LR |
1972 | request->alpha2[0] = alpha2[0]; |
1973 | request->alpha2[1] = alpha2[1]; | |
7db90f4a | 1974 | request->initiator = NL80211_REGDOM_SET_BY_DRIVER; |
fe33eb39 LR |
1975 | |
1976 | queue_regulatory_request(request); | |
1977 | ||
1978 | return 0; | |
b2e1b302 LR |
1979 | } |
1980 | EXPORT_SYMBOL(regulatory_hint); | |
1981 | ||
789fd033 LR |
1982 | void regulatory_hint_country_ie(struct wiphy *wiphy, enum ieee80211_band band, |
1983 | const u8 *country_ie, u8 country_ie_len) | |
3f2355cb | 1984 | { |
3f2355cb | 1985 | char alpha2[2]; |
3f2355cb | 1986 | enum environment_cap env = ENVIRON_ANY; |
db2424c5 | 1987 | struct regulatory_request *request = NULL, *lr; |
d335fe63 | 1988 | |
3f2355cb LR |
1989 | /* IE len must be evenly divisible by 2 */ |
1990 | if (country_ie_len & 0x01) | |
db2424c5 | 1991 | return; |
3f2355cb LR |
1992 | |
1993 | if (country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN) | |
db2424c5 JB |
1994 | return; |
1995 | ||
1996 | request = kzalloc(sizeof(*request), GFP_KERNEL); | |
1997 | if (!request) | |
1998 | return; | |
3f2355cb | 1999 | |
3f2355cb LR |
2000 | alpha2[0] = country_ie[0]; |
2001 | alpha2[1] = country_ie[1]; | |
2002 | ||
2003 | if (country_ie[2] == 'I') | |
2004 | env = ENVIRON_INDOOR; | |
2005 | else if (country_ie[2] == 'O') | |
2006 | env = ENVIRON_OUTDOOR; | |
2007 | ||
db2424c5 JB |
2008 | rcu_read_lock(); |
2009 | lr = get_last_request(); | |
2010 | ||
2011 | if (unlikely(!lr)) | |
2012 | goto out; | |
2013 | ||
fb1fc7ad | 2014 | /* |
8b19e6ca | 2015 | * We will run this only upon a successful connection on cfg80211. |
4b44c8bc | 2016 | * We leave conflict resolution to the workqueue, where can hold |
5fe231e8 | 2017 | * the RTNL. |
fb1fc7ad | 2018 | */ |
c492db37 JB |
2019 | if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE && |
2020 | lr->wiphy_idx != WIPHY_IDX_INVALID) | |
4b44c8bc | 2021 | goto out; |
3f2355cb | 2022 | |
fe33eb39 | 2023 | request->wiphy_idx = get_wiphy_idx(wiphy); |
4f366c5d JL |
2024 | request->alpha2[0] = alpha2[0]; |
2025 | request->alpha2[1] = alpha2[1]; | |
7db90f4a | 2026 | request->initiator = NL80211_REGDOM_SET_BY_COUNTRY_IE; |
fe33eb39 LR |
2027 | request->country_ie_env = env; |
2028 | ||
fe33eb39 | 2029 | queue_regulatory_request(request); |
db2424c5 | 2030 | request = NULL; |
3f2355cb | 2031 | out: |
db2424c5 JB |
2032 | kfree(request); |
2033 | rcu_read_unlock(); | |
3f2355cb | 2034 | } |
b2e1b302 | 2035 | |
09d989d1 LR |
2036 | static void restore_alpha2(char *alpha2, bool reset_user) |
2037 | { | |
2038 | /* indicates there is no alpha2 to consider for restoration */ | |
2039 | alpha2[0] = '9'; | |
2040 | alpha2[1] = '7'; | |
2041 | ||
2042 | /* The user setting has precedence over the module parameter */ | |
2043 | if (is_user_regdom_saved()) { | |
2044 | /* Unless we're asked to ignore it and reset it */ | |
2045 | if (reset_user) { | |
1a919318 | 2046 | REG_DBG_PRINT("Restoring regulatory settings including user preference\n"); |
09d989d1 LR |
2047 | user_alpha2[0] = '9'; |
2048 | user_alpha2[1] = '7'; | |
2049 | ||
2050 | /* | |
2051 | * If we're ignoring user settings, we still need to | |
2052 | * check the module parameter to ensure we put things | |
2053 | * back as they were for a full restore. | |
2054 | */ | |
2055 | if (!is_world_regdom(ieee80211_regdom)) { | |
1a919318 JB |
2056 | REG_DBG_PRINT("Keeping preference on module parameter ieee80211_regdom: %c%c\n", |
2057 | ieee80211_regdom[0], ieee80211_regdom[1]); | |
09d989d1 LR |
2058 | alpha2[0] = ieee80211_regdom[0]; |
2059 | alpha2[1] = ieee80211_regdom[1]; | |
2060 | } | |
2061 | } else { | |
1a919318 JB |
2062 | REG_DBG_PRINT("Restoring regulatory settings while preserving user preference for: %c%c\n", |
2063 | user_alpha2[0], user_alpha2[1]); | |
09d989d1 LR |
2064 | alpha2[0] = user_alpha2[0]; |
2065 | alpha2[1] = user_alpha2[1]; | |
2066 | } | |
2067 | } else if (!is_world_regdom(ieee80211_regdom)) { | |
1a919318 JB |
2068 | REG_DBG_PRINT("Keeping preference on module parameter ieee80211_regdom: %c%c\n", |
2069 | ieee80211_regdom[0], ieee80211_regdom[1]); | |
09d989d1 LR |
2070 | alpha2[0] = ieee80211_regdom[0]; |
2071 | alpha2[1] = ieee80211_regdom[1]; | |
2072 | } else | |
d91e41b6 | 2073 | REG_DBG_PRINT("Restoring regulatory settings\n"); |
09d989d1 LR |
2074 | } |
2075 | ||
5ce543d1 RM |
2076 | static void restore_custom_reg_settings(struct wiphy *wiphy) |
2077 | { | |
2078 | struct ieee80211_supported_band *sband; | |
2079 | enum ieee80211_band band; | |
2080 | struct ieee80211_channel *chan; | |
2081 | int i; | |
2082 | ||
2083 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) { | |
2084 | sband = wiphy->bands[band]; | |
2085 | if (!sband) | |
2086 | continue; | |
2087 | for (i = 0; i < sband->n_channels; i++) { | |
2088 | chan = &sband->channels[i]; | |
2089 | chan->flags = chan->orig_flags; | |
2090 | chan->max_antenna_gain = chan->orig_mag; | |
2091 | chan->max_power = chan->orig_mpwr; | |
899852af | 2092 | chan->beacon_found = false; |
5ce543d1 RM |
2093 | } |
2094 | } | |
2095 | } | |
2096 | ||
09d989d1 LR |
2097 | /* |
2098 | * Restoring regulatory settings involves ingoring any | |
2099 | * possibly stale country IE information and user regulatory | |
2100 | * settings if so desired, this includes any beacon hints | |
2101 | * learned as we could have traveled outside to another country | |
2102 | * after disconnection. To restore regulatory settings we do | |
2103 | * exactly what we did at bootup: | |
2104 | * | |
2105 | * - send a core regulatory hint | |
2106 | * - send a user regulatory hint if applicable | |
2107 | * | |
2108 | * Device drivers that send a regulatory hint for a specific country | |
2109 | * keep their own regulatory domain on wiphy->regd so that does does | |
2110 | * not need to be remembered. | |
2111 | */ | |
2112 | static void restore_regulatory_settings(bool reset_user) | |
2113 | { | |
2114 | char alpha2[2]; | |
cee0bec5 | 2115 | char world_alpha2[2]; |
09d989d1 | 2116 | struct reg_beacon *reg_beacon, *btmp; |
14609555 LR |
2117 | struct regulatory_request *reg_request, *tmp; |
2118 | LIST_HEAD(tmp_reg_req_list); | |
5ce543d1 | 2119 | struct cfg80211_registered_device *rdev; |
09d989d1 | 2120 | |
5fe231e8 JB |
2121 | ASSERT_RTNL(); |
2122 | ||
2d319867 | 2123 | reset_regdomains(true, &world_regdom); |
09d989d1 LR |
2124 | restore_alpha2(alpha2, reset_user); |
2125 | ||
14609555 LR |
2126 | /* |
2127 | * If there's any pending requests we simply | |
2128 | * stash them to a temporary pending queue and | |
2129 | * add then after we've restored regulatory | |
2130 | * settings. | |
2131 | */ | |
2132 | spin_lock(®_requests_lock); | |
fea9bced JB |
2133 | list_for_each_entry_safe(reg_request, tmp, ®_requests_list, list) { |
2134 | if (reg_request->initiator != NL80211_REGDOM_SET_BY_USER) | |
2135 | continue; | |
2136 | list_move_tail(®_request->list, &tmp_reg_req_list); | |
14609555 LR |
2137 | } |
2138 | spin_unlock(®_requests_lock); | |
2139 | ||
09d989d1 LR |
2140 | /* Clear beacon hints */ |
2141 | spin_lock_bh(®_pending_beacons_lock); | |
fea9bced JB |
2142 | list_for_each_entry_safe(reg_beacon, btmp, ®_pending_beacons, list) { |
2143 | list_del(®_beacon->list); | |
2144 | kfree(reg_beacon); | |
09d989d1 LR |
2145 | } |
2146 | spin_unlock_bh(®_pending_beacons_lock); | |
2147 | ||
fea9bced JB |
2148 | list_for_each_entry_safe(reg_beacon, btmp, ®_beacon_list, list) { |
2149 | list_del(®_beacon->list); | |
2150 | kfree(reg_beacon); | |
09d989d1 LR |
2151 | } |
2152 | ||
2153 | /* First restore to the basic regulatory settings */ | |
379b82f4 JB |
2154 | world_alpha2[0] = cfg80211_world_regdom->alpha2[0]; |
2155 | world_alpha2[1] = cfg80211_world_regdom->alpha2[1]; | |
09d989d1 | 2156 | |
5ce543d1 | 2157 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) { |
a2f73b6c | 2158 | if (rdev->wiphy.regulatory_flags & REGULATORY_CUSTOM_REG) |
5ce543d1 RM |
2159 | restore_custom_reg_settings(&rdev->wiphy); |
2160 | } | |
2161 | ||
cee0bec5 | 2162 | regulatory_hint_core(world_alpha2); |
09d989d1 LR |
2163 | |
2164 | /* | |
2165 | * This restores the ieee80211_regdom module parameter | |
2166 | * preference or the last user requested regulatory | |
2167 | * settings, user regulatory settings takes precedence. | |
2168 | */ | |
2169 | if (is_an_alpha2(alpha2)) | |
57b5ce07 | 2170 | regulatory_hint_user(user_alpha2, NL80211_USER_REG_HINT_USER); |
09d989d1 | 2171 | |
14609555 | 2172 | spin_lock(®_requests_lock); |
11cff96c | 2173 | list_splice_tail_init(&tmp_reg_req_list, ®_requests_list); |
14609555 LR |
2174 | spin_unlock(®_requests_lock); |
2175 | ||
14609555 LR |
2176 | REG_DBG_PRINT("Kicking the queue\n"); |
2177 | ||
2178 | schedule_work(®_work); | |
2179 | } | |
09d989d1 LR |
2180 | |
2181 | void regulatory_hint_disconnect(void) | |
2182 | { | |
1a919318 | 2183 | REG_DBG_PRINT("All devices are disconnected, going to restore regulatory settings\n"); |
09d989d1 LR |
2184 | restore_regulatory_settings(false); |
2185 | } | |
2186 | ||
e38f8a7a LR |
2187 | static bool freq_is_chan_12_13_14(u16 freq) |
2188 | { | |
59eb21a6 BR |
2189 | if (freq == ieee80211_channel_to_frequency(12, IEEE80211_BAND_2GHZ) || |
2190 | freq == ieee80211_channel_to_frequency(13, IEEE80211_BAND_2GHZ) || | |
2191 | freq == ieee80211_channel_to_frequency(14, IEEE80211_BAND_2GHZ)) | |
e38f8a7a LR |
2192 | return true; |
2193 | return false; | |
2194 | } | |
2195 | ||
3ebfa6e7 LR |
2196 | static bool pending_reg_beacon(struct ieee80211_channel *beacon_chan) |
2197 | { | |
2198 | struct reg_beacon *pending_beacon; | |
2199 | ||
2200 | list_for_each_entry(pending_beacon, ®_pending_beacons, list) | |
2201 | if (beacon_chan->center_freq == | |
2202 | pending_beacon->chan.center_freq) | |
2203 | return true; | |
2204 | return false; | |
2205 | } | |
2206 | ||
e38f8a7a LR |
2207 | int regulatory_hint_found_beacon(struct wiphy *wiphy, |
2208 | struct ieee80211_channel *beacon_chan, | |
2209 | gfp_t gfp) | |
2210 | { | |
2211 | struct reg_beacon *reg_beacon; | |
3ebfa6e7 | 2212 | bool processing; |
e38f8a7a | 2213 | |
1a919318 JB |
2214 | if (beacon_chan->beacon_found || |
2215 | beacon_chan->flags & IEEE80211_CHAN_RADAR || | |
e38f8a7a | 2216 | (beacon_chan->band == IEEE80211_BAND_2GHZ && |
1a919318 | 2217 | !freq_is_chan_12_13_14(beacon_chan->center_freq))) |
e38f8a7a LR |
2218 | return 0; |
2219 | ||
3ebfa6e7 LR |
2220 | spin_lock_bh(®_pending_beacons_lock); |
2221 | processing = pending_reg_beacon(beacon_chan); | |
2222 | spin_unlock_bh(®_pending_beacons_lock); | |
2223 | ||
2224 | if (processing) | |
e38f8a7a LR |
2225 | return 0; |
2226 | ||
2227 | reg_beacon = kzalloc(sizeof(struct reg_beacon), gfp); | |
2228 | if (!reg_beacon) | |
2229 | return -ENOMEM; | |
2230 | ||
1a919318 | 2231 | REG_DBG_PRINT("Found new beacon on frequency: %d MHz (Ch %d) on %s\n", |
4113f751 LR |
2232 | beacon_chan->center_freq, |
2233 | ieee80211_frequency_to_channel(beacon_chan->center_freq), | |
2234 | wiphy_name(wiphy)); | |
2235 | ||
e38f8a7a | 2236 | memcpy(®_beacon->chan, beacon_chan, |
1a919318 | 2237 | sizeof(struct ieee80211_channel)); |
e38f8a7a LR |
2238 | |
2239 | /* | |
2240 | * Since we can be called from BH or and non-BH context | |
2241 | * we must use spin_lock_bh() | |
2242 | */ | |
2243 | spin_lock_bh(®_pending_beacons_lock); | |
2244 | list_add_tail(®_beacon->list, ®_pending_beacons); | |
2245 | spin_unlock_bh(®_pending_beacons_lock); | |
2246 | ||
2247 | schedule_work(®_work); | |
2248 | ||
2249 | return 0; | |
2250 | } | |
2251 | ||
a3d2eaf0 | 2252 | static void print_rd_rules(const struct ieee80211_regdomain *rd) |
b2e1b302 LR |
2253 | { |
2254 | unsigned int i; | |
a3d2eaf0 JB |
2255 | const struct ieee80211_reg_rule *reg_rule = NULL; |
2256 | const struct ieee80211_freq_range *freq_range = NULL; | |
2257 | const struct ieee80211_power_rule *power_rule = NULL; | |
97524820 | 2258 | char bw[32]; |
b2e1b302 | 2259 | |
6653325a | 2260 | pr_info(" (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)\n"); |
b2e1b302 LR |
2261 | |
2262 | for (i = 0; i < rd->n_reg_rules; i++) { | |
2263 | reg_rule = &rd->reg_rules[i]; | |
2264 | freq_range = ®_rule->freq_range; | |
2265 | power_rule = ®_rule->power_rule; | |
2266 | ||
b0dfd2ea JD |
2267 | if (reg_rule->flags & NL80211_RRF_AUTO_BW) |
2268 | snprintf(bw, sizeof(bw), "%d KHz, %d KHz AUTO", | |
2269 | freq_range->max_bandwidth_khz, | |
97524820 JD |
2270 | reg_get_max_bandwidth(rd, reg_rule)); |
2271 | else | |
b0dfd2ea | 2272 | snprintf(bw, sizeof(bw), "%d KHz", |
97524820 JD |
2273 | freq_range->max_bandwidth_khz); |
2274 | ||
fb1fc7ad LR |
2275 | /* |
2276 | * There may not be documentation for max antenna gain | |
2277 | * in certain regions | |
2278 | */ | |
b2e1b302 | 2279 | if (power_rule->max_antenna_gain) |
97524820 | 2280 | pr_info(" (%d KHz - %d KHz @ %s), (%d mBi, %d mBm)\n", |
b2e1b302 LR |
2281 | freq_range->start_freq_khz, |
2282 | freq_range->end_freq_khz, | |
97524820 | 2283 | bw, |
b2e1b302 LR |
2284 | power_rule->max_antenna_gain, |
2285 | power_rule->max_eirp); | |
2286 | else | |
97524820 | 2287 | pr_info(" (%d KHz - %d KHz @ %s), (N/A, %d mBm)\n", |
b2e1b302 LR |
2288 | freq_range->start_freq_khz, |
2289 | freq_range->end_freq_khz, | |
97524820 | 2290 | bw, |
b2e1b302 LR |
2291 | power_rule->max_eirp); |
2292 | } | |
2293 | } | |
2294 | ||
4c7d3982 | 2295 | bool reg_supported_dfs_region(enum nl80211_dfs_regions dfs_region) |
8b60b078 LR |
2296 | { |
2297 | switch (dfs_region) { | |
2298 | case NL80211_DFS_UNSET: | |
2299 | case NL80211_DFS_FCC: | |
2300 | case NL80211_DFS_ETSI: | |
2301 | case NL80211_DFS_JP: | |
2302 | return true; | |
2303 | default: | |
2304 | REG_DBG_PRINT("Ignoring uknown DFS master region: %d\n", | |
2305 | dfs_region); | |
2306 | return false; | |
2307 | } | |
2308 | } | |
2309 | ||
a3d2eaf0 | 2310 | static void print_regdomain(const struct ieee80211_regdomain *rd) |
b2e1b302 | 2311 | { |
c492db37 | 2312 | struct regulatory_request *lr = get_last_request(); |
b2e1b302 | 2313 | |
3f2355cb | 2314 | if (is_intersected_alpha2(rd->alpha2)) { |
c492db37 | 2315 | if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) { |
79c97e97 | 2316 | struct cfg80211_registered_device *rdev; |
c492db37 | 2317 | rdev = cfg80211_rdev_by_wiphy_idx(lr->wiphy_idx); |
79c97e97 | 2318 | if (rdev) { |
e9c0268f | 2319 | pr_info("Current regulatory domain updated by AP to: %c%c\n", |
79c97e97 JB |
2320 | rdev->country_ie_alpha2[0], |
2321 | rdev->country_ie_alpha2[1]); | |
3f2355cb | 2322 | } else |
e9c0268f | 2323 | pr_info("Current regulatory domain intersected:\n"); |
3f2355cb | 2324 | } else |
e9c0268f | 2325 | pr_info("Current regulatory domain intersected:\n"); |
1a919318 | 2326 | } else if (is_world_regdom(rd->alpha2)) { |
e9c0268f | 2327 | pr_info("World regulatory domain updated:\n"); |
1a919318 | 2328 | } else { |
b2e1b302 | 2329 | if (is_unknown_alpha2(rd->alpha2)) |
e9c0268f | 2330 | pr_info("Regulatory domain changed to driver built-in settings (unknown country)\n"); |
57b5ce07 | 2331 | else { |
c492db37 | 2332 | if (reg_request_cell_base(lr)) |
1a919318 | 2333 | pr_info("Regulatory domain changed to country: %c%c by Cell Station\n", |
57b5ce07 LR |
2334 | rd->alpha2[0], rd->alpha2[1]); |
2335 | else | |
1a919318 | 2336 | pr_info("Regulatory domain changed to country: %c%c\n", |
57b5ce07 LR |
2337 | rd->alpha2[0], rd->alpha2[1]); |
2338 | } | |
b2e1b302 | 2339 | } |
1a919318 | 2340 | |
3ef121b5 | 2341 | pr_info(" DFS Master region: %s", reg_dfs_region_str(rd->dfs_region)); |
b2e1b302 LR |
2342 | print_rd_rules(rd); |
2343 | } | |
2344 | ||
2df78167 | 2345 | static void print_regdomain_info(const struct ieee80211_regdomain *rd) |
b2e1b302 | 2346 | { |
e9c0268f | 2347 | pr_info("Regulatory domain: %c%c\n", rd->alpha2[0], rd->alpha2[1]); |
b2e1b302 LR |
2348 | print_rd_rules(rd); |
2349 | } | |
2350 | ||
3b9e5aca LR |
2351 | static int reg_set_rd_core(const struct ieee80211_regdomain *rd) |
2352 | { | |
2353 | if (!is_world_regdom(rd->alpha2)) | |
2354 | return -EINVAL; | |
2355 | update_world_regdomain(rd); | |
2356 | return 0; | |
2357 | } | |
2358 | ||
84721d44 LR |
2359 | static int reg_set_rd_user(const struct ieee80211_regdomain *rd, |
2360 | struct regulatory_request *user_request) | |
2361 | { | |
2362 | const struct ieee80211_regdomain *intersected_rd = NULL; | |
2363 | ||
2364 | if (is_world_regdom(rd->alpha2)) | |
2365 | return -EINVAL; | |
2366 | ||
2367 | if (!regdom_changes(rd->alpha2)) | |
2368 | return -EALREADY; | |
2369 | ||
2370 | if (!is_valid_rd(rd)) { | |
2371 | pr_err("Invalid regulatory domain detected:\n"); | |
2372 | print_regdomain_info(rd); | |
2373 | return -EINVAL; | |
2374 | } | |
2375 | ||
2376 | if (!user_request->intersect) { | |
2377 | reset_regdomains(false, rd); | |
2378 | return 0; | |
2379 | } | |
2380 | ||
2381 | intersected_rd = regdom_intersect(rd, get_cfg80211_regdom()); | |
2382 | if (!intersected_rd) | |
2383 | return -EINVAL; | |
2384 | ||
2385 | kfree(rd); | |
2386 | rd = NULL; | |
2387 | reset_regdomains(false, intersected_rd); | |
2388 | ||
2389 | return 0; | |
2390 | } | |
2391 | ||
f5fe3247 LR |
2392 | static int reg_set_rd_driver(const struct ieee80211_regdomain *rd, |
2393 | struct regulatory_request *driver_request) | |
b2e1b302 | 2394 | { |
e9763c3c | 2395 | const struct ieee80211_regdomain *regd; |
9c96477d | 2396 | const struct ieee80211_regdomain *intersected_rd = NULL; |
f5fe3247 | 2397 | const struct ieee80211_regdomain *tmp; |
806a9e39 | 2398 | struct wiphy *request_wiphy; |
6913b49a | 2399 | |
f5fe3247 | 2400 | if (is_world_regdom(rd->alpha2)) |
b2e1b302 LR |
2401 | return -EINVAL; |
2402 | ||
f5fe3247 LR |
2403 | if (!regdom_changes(rd->alpha2)) |
2404 | return -EALREADY; | |
b2e1b302 | 2405 | |
8375af3b | 2406 | if (!is_valid_rd(rd)) { |
e9c0268f | 2407 | pr_err("Invalid regulatory domain detected:\n"); |
8375af3b LR |
2408 | print_regdomain_info(rd); |
2409 | return -EINVAL; | |
b2e1b302 LR |
2410 | } |
2411 | ||
f5fe3247 LR |
2412 | request_wiphy = wiphy_idx_to_wiphy(driver_request->wiphy_idx); |
2413 | if (!request_wiphy) { | |
845f3351 SD |
2414 | queue_delayed_work(system_power_efficient_wq, |
2415 | ®_timeout, 0); | |
de3584bd JB |
2416 | return -ENODEV; |
2417 | } | |
806a9e39 | 2418 | |
f5fe3247 | 2419 | if (!driver_request->intersect) { |
558f6d32 LR |
2420 | if (request_wiphy->regd) |
2421 | return -EALREADY; | |
3e0c3ff3 | 2422 | |
e9763c3c JB |
2423 | regd = reg_copy_regd(rd); |
2424 | if (IS_ERR(regd)) | |
2425 | return PTR_ERR(regd); | |
3e0c3ff3 | 2426 | |
458f4f9e | 2427 | rcu_assign_pointer(request_wiphy->regd, regd); |
379b82f4 | 2428 | reset_regdomains(false, rd); |
b8295acd LR |
2429 | return 0; |
2430 | } | |
2431 | ||
f5fe3247 LR |
2432 | intersected_rd = regdom_intersect(rd, get_cfg80211_regdom()); |
2433 | if (!intersected_rd) | |
2434 | return -EINVAL; | |
b8295acd | 2435 | |
f5fe3247 LR |
2436 | /* |
2437 | * We can trash what CRDA provided now. | |
2438 | * However if a driver requested this specific regulatory | |
2439 | * domain we keep it for its private use | |
2440 | */ | |
2441 | tmp = get_wiphy_regdom(request_wiphy); | |
2442 | rcu_assign_pointer(request_wiphy->regd, rd); | |
2443 | rcu_free_regdom(tmp); | |
b8295acd | 2444 | |
f5fe3247 | 2445 | rd = NULL; |
b7566fc3 | 2446 | |
f5fe3247 | 2447 | reset_regdomains(false, intersected_rd); |
3e0c3ff3 | 2448 | |
f5fe3247 LR |
2449 | return 0; |
2450 | } | |
2451 | ||
01992406 LR |
2452 | static int reg_set_rd_country_ie(const struct ieee80211_regdomain *rd, |
2453 | struct regulatory_request *country_ie_request) | |
f5fe3247 LR |
2454 | { |
2455 | struct wiphy *request_wiphy; | |
b8295acd | 2456 | |
f5fe3247 LR |
2457 | if (!is_alpha2_set(rd->alpha2) && !is_an_alpha2(rd->alpha2) && |
2458 | !is_unknown_alpha2(rd->alpha2)) | |
2459 | return -EINVAL; | |
b8295acd | 2460 | |
f5fe3247 LR |
2461 | /* |
2462 | * Lets only bother proceeding on the same alpha2 if the current | |
2463 | * rd is non static (it means CRDA was present and was used last) | |
2464 | * and the pending request came in from a country IE | |
2465 | */ | |
2466 | ||
2467 | if (!is_valid_rd(rd)) { | |
2468 | pr_err("Invalid regulatory domain detected:\n"); | |
2469 | print_regdomain_info(rd); | |
2470 | return -EINVAL; | |
9c96477d LR |
2471 | } |
2472 | ||
01992406 | 2473 | request_wiphy = wiphy_idx_to_wiphy(country_ie_request->wiphy_idx); |
f5fe3247 | 2474 | if (!request_wiphy) { |
845f3351 SD |
2475 | queue_delayed_work(system_power_efficient_wq, |
2476 | ®_timeout, 0); | |
f5fe3247 LR |
2477 | return -ENODEV; |
2478 | } | |
b2e1b302 | 2479 | |
01992406 | 2480 | if (country_ie_request->intersect) |
f5fe3247 LR |
2481 | return -EINVAL; |
2482 | ||
2483 | reset_regdomains(false, rd); | |
2484 | return 0; | |
2485 | } | |
b2e1b302 | 2486 | |
fb1fc7ad LR |
2487 | /* |
2488 | * Use this call to set the current regulatory domain. Conflicts with | |
b2e1b302 | 2489 | * multiple drivers can be ironed out later. Caller must've already |
458f4f9e | 2490 | * kmalloc'd the rd structure. |
fb1fc7ad | 2491 | */ |
a3d2eaf0 | 2492 | int set_regdom(const struct ieee80211_regdomain *rd) |
b2e1b302 | 2493 | { |
c492db37 | 2494 | struct regulatory_request *lr; |
b2e1b302 LR |
2495 | int r; |
2496 | ||
3b9e5aca LR |
2497 | if (!reg_is_valid_request(rd->alpha2)) { |
2498 | kfree(rd); | |
2499 | return -EINVAL; | |
2500 | } | |
2501 | ||
c492db37 | 2502 | lr = get_last_request(); |
abc7381b | 2503 | |
b2e1b302 | 2504 | /* Note that this doesn't update the wiphys, this is done below */ |
3b9e5aca LR |
2505 | switch (lr->initiator) { |
2506 | case NL80211_REGDOM_SET_BY_CORE: | |
2507 | r = reg_set_rd_core(rd); | |
2508 | break; | |
2509 | case NL80211_REGDOM_SET_BY_USER: | |
84721d44 LR |
2510 | r = reg_set_rd_user(rd, lr); |
2511 | break; | |
3b9e5aca | 2512 | case NL80211_REGDOM_SET_BY_DRIVER: |
f5fe3247 LR |
2513 | r = reg_set_rd_driver(rd, lr); |
2514 | break; | |
3b9e5aca | 2515 | case NL80211_REGDOM_SET_BY_COUNTRY_IE: |
01992406 | 2516 | r = reg_set_rd_country_ie(rd, lr); |
3b9e5aca LR |
2517 | break; |
2518 | default: | |
2519 | WARN(1, "invalid initiator %d\n", lr->initiator); | |
2520 | return -EINVAL; | |
2521 | } | |
2522 | ||
d2372b31 | 2523 | if (r) { |
95908535 KV |
2524 | if (r == -EALREADY) |
2525 | reg_set_request_processed(); | |
2526 | ||
d2372b31 | 2527 | kfree(rd); |
38fd2143 | 2528 | return r; |
d2372b31 | 2529 | } |
b2e1b302 | 2530 | |
b2e1b302 | 2531 | /* This would make this whole thing pointless */ |
38fd2143 JB |
2532 | if (WARN_ON(!lr->intersect && rd != get_cfg80211_regdom())) |
2533 | return -EINVAL; | |
b2e1b302 LR |
2534 | |
2535 | /* update all wiphys now with the new established regulatory domain */ | |
c492db37 | 2536 | update_all_wiphy_regulatory(lr->initiator); |
b2e1b302 | 2537 | |
458f4f9e | 2538 | print_regdomain(get_cfg80211_regdom()); |
b2e1b302 | 2539 | |
c492db37 | 2540 | nl80211_send_reg_change_event(lr); |
73d54c9e | 2541 | |
b2e253cf LR |
2542 | reg_set_request_processed(); |
2543 | ||
38fd2143 | 2544 | return 0; |
b2e1b302 LR |
2545 | } |
2546 | ||
4d9d88d1 SJR |
2547 | int reg_device_uevent(struct device *dev, struct kobj_uevent_env *env) |
2548 | { | |
4a484cff JB |
2549 | struct regulatory_request *lr; |
2550 | u8 alpha2[2]; | |
2551 | bool add = false; | |
c492db37 | 2552 | |
4a484cff JB |
2553 | rcu_read_lock(); |
2554 | lr = get_last_request(); | |
c492db37 | 2555 | if (lr && !lr->processed) { |
4a484cff JB |
2556 | memcpy(alpha2, lr->alpha2, 2); |
2557 | add = true; | |
4d9d88d1 | 2558 | } |
4a484cff | 2559 | rcu_read_unlock(); |
4d9d88d1 | 2560 | |
4a484cff JB |
2561 | if (add) |
2562 | return add_uevent_var(env, "COUNTRY=%c%c", | |
2563 | alpha2[0], alpha2[1]); | |
4d9d88d1 SJR |
2564 | return 0; |
2565 | } | |
4d9d88d1 | 2566 | |
57b5ce07 LR |
2567 | void wiphy_regulatory_register(struct wiphy *wiphy) |
2568 | { | |
23df0b73 AN |
2569 | struct regulatory_request *lr; |
2570 | ||
57b5ce07 LR |
2571 | if (!reg_dev_ignore_cell_hint(wiphy)) |
2572 | reg_num_devs_support_basehint++; | |
2573 | ||
23df0b73 AN |
2574 | lr = get_last_request(); |
2575 | wiphy_update_regulatory(wiphy, lr->initiator); | |
57b5ce07 LR |
2576 | } |
2577 | ||
bfead080 | 2578 | void wiphy_regulatory_deregister(struct wiphy *wiphy) |
3f2355cb | 2579 | { |
0ad8acaf | 2580 | struct wiphy *request_wiphy = NULL; |
c492db37 | 2581 | struct regulatory_request *lr; |
761cf7ec | 2582 | |
c492db37 | 2583 | lr = get_last_request(); |
abc7381b | 2584 | |
57b5ce07 LR |
2585 | if (!reg_dev_ignore_cell_hint(wiphy)) |
2586 | reg_num_devs_support_basehint--; | |
2587 | ||
458f4f9e JB |
2588 | rcu_free_regdom(get_wiphy_regdom(wiphy)); |
2589 | rcu_assign_pointer(wiphy->regd, NULL); | |
0ef9ccdd | 2590 | |
c492db37 JB |
2591 | if (lr) |
2592 | request_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx); | |
806a9e39 | 2593 | |
0ef9ccdd | 2594 | if (!request_wiphy || request_wiphy != wiphy) |
38fd2143 | 2595 | return; |
0ef9ccdd | 2596 | |
c492db37 JB |
2597 | lr->wiphy_idx = WIPHY_IDX_INVALID; |
2598 | lr->country_ie_env = ENVIRON_ANY; | |
3f2355cb LR |
2599 | } |
2600 | ||
a90c7a31 LR |
2601 | static void reg_timeout_work(struct work_struct *work) |
2602 | { | |
1a919318 | 2603 | REG_DBG_PRINT("Timeout while waiting for CRDA to reply, restoring regulatory settings\n"); |
f77b86d7 | 2604 | rtnl_lock(); |
a90c7a31 | 2605 | restore_regulatory_settings(true); |
f77b86d7 | 2606 | rtnl_unlock(); |
a90c7a31 LR |
2607 | } |
2608 | ||
2fcc9f73 | 2609 | int __init regulatory_init(void) |
b2e1b302 | 2610 | { |
bcf4f99b | 2611 | int err = 0; |
734366de | 2612 | |
b2e1b302 LR |
2613 | reg_pdev = platform_device_register_simple("regulatory", 0, NULL, 0); |
2614 | if (IS_ERR(reg_pdev)) | |
2615 | return PTR_ERR(reg_pdev); | |
734366de | 2616 | |
4d9d88d1 SJR |
2617 | reg_pdev->dev.type = ®_device_type; |
2618 | ||
fe33eb39 | 2619 | spin_lock_init(®_requests_lock); |
e38f8a7a | 2620 | spin_lock_init(®_pending_beacons_lock); |
fe33eb39 | 2621 | |
80007efe LR |
2622 | reg_regdb_size_check(); |
2623 | ||
458f4f9e | 2624 | rcu_assign_pointer(cfg80211_regdomain, cfg80211_world_regdom); |
734366de | 2625 | |
09d989d1 LR |
2626 | user_alpha2[0] = '9'; |
2627 | user_alpha2[1] = '7'; | |
2628 | ||
ae9e4b0d | 2629 | /* We always try to get an update for the static regdomain */ |
458f4f9e | 2630 | err = regulatory_hint_core(cfg80211_world_regdom->alpha2); |
ba25c141 | 2631 | if (err) { |
bcf4f99b LR |
2632 | if (err == -ENOMEM) |
2633 | return err; | |
2634 | /* | |
2635 | * N.B. kobject_uevent_env() can fail mainly for when we're out | |
2636 | * memory which is handled and propagated appropriately above | |
2637 | * but it can also fail during a netlink_broadcast() or during | |
2638 | * early boot for call_usermodehelper(). For now treat these | |
2639 | * errors as non-fatal. | |
2640 | */ | |
e9c0268f | 2641 | pr_err("kobject_uevent_env() was unable to call CRDA during init\n"); |
bcf4f99b | 2642 | } |
734366de | 2643 | |
ae9e4b0d LR |
2644 | /* |
2645 | * Finally, if the user set the module parameter treat it | |
2646 | * as a user hint. | |
2647 | */ | |
2648 | if (!is_world_regdom(ieee80211_regdom)) | |
57b5ce07 LR |
2649 | regulatory_hint_user(ieee80211_regdom, |
2650 | NL80211_USER_REG_HINT_USER); | |
ae9e4b0d | 2651 | |
b2e1b302 LR |
2652 | return 0; |
2653 | } | |
2654 | ||
1a919318 | 2655 | void regulatory_exit(void) |
b2e1b302 | 2656 | { |
fe33eb39 | 2657 | struct regulatory_request *reg_request, *tmp; |
e38f8a7a | 2658 | struct reg_beacon *reg_beacon, *btmp; |
fe33eb39 LR |
2659 | |
2660 | cancel_work_sync(®_work); | |
a90c7a31 | 2661 | cancel_delayed_work_sync(®_timeout); |
fe33eb39 | 2662 | |
9027b149 | 2663 | /* Lock to suppress warnings */ |
38fd2143 | 2664 | rtnl_lock(); |
379b82f4 | 2665 | reset_regdomains(true, NULL); |
38fd2143 | 2666 | rtnl_unlock(); |
734366de | 2667 | |
58ebacc6 | 2668 | dev_set_uevent_suppress(®_pdev->dev, true); |
f6037d09 | 2669 | |
b2e1b302 | 2670 | platform_device_unregister(reg_pdev); |
734366de | 2671 | |
fea9bced JB |
2672 | list_for_each_entry_safe(reg_beacon, btmp, ®_pending_beacons, list) { |
2673 | list_del(®_beacon->list); | |
2674 | kfree(reg_beacon); | |
e38f8a7a | 2675 | } |
e38f8a7a | 2676 | |
fea9bced JB |
2677 | list_for_each_entry_safe(reg_beacon, btmp, ®_beacon_list, list) { |
2678 | list_del(®_beacon->list); | |
2679 | kfree(reg_beacon); | |
e38f8a7a LR |
2680 | } |
2681 | ||
fea9bced JB |
2682 | list_for_each_entry_safe(reg_request, tmp, ®_requests_list, list) { |
2683 | list_del(®_request->list); | |
2684 | kfree(reg_request); | |
fe33eb39 | 2685 | } |
8318d78a | 2686 | } |