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Commit | Line | Data |
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8318d78a JB |
1 | /* |
2 | * Copyright 2002-2005, Instant802 Networks, Inc. | |
3 | * Copyright 2005-2006, Devicescape Software, Inc. | |
4 | * Copyright 2007 Johannes Berg <johannes@sipsolutions.net> | |
3b77d5ec | 5 | * Copyright 2008-2011 Luis R. Rodriguez <mcgrof@qca.qualcomm.com> |
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 | ||
566 | if (freq_range_tmp->max_bandwidth_khz) | |
567 | break; | |
568 | ||
569 | freq_range = freq_range_tmp; | |
570 | } | |
571 | ||
572 | start_freq = freq_range->start_freq_khz; | |
573 | ||
574 | /* get end_freq */ | |
575 | freq_range = &rule->freq_range; | |
576 | no = idx; | |
577 | ||
578 | while (no < rd->n_reg_rules - 1) { | |
579 | tmp = &rd->reg_rules[++no]; | |
580 | freq_range_tmp = &tmp->freq_range; | |
581 | ||
582 | if (freq_range_tmp->start_freq_khz > freq_range->end_freq_khz) | |
583 | break; | |
584 | ||
585 | if (freq_range_tmp->max_bandwidth_khz) | |
586 | break; | |
587 | ||
588 | freq_range = freq_range_tmp; | |
589 | } | |
590 | ||
591 | end_freq = freq_range->end_freq_khz; | |
592 | ||
593 | return end_freq - start_freq; | |
594 | } | |
595 | ||
b2e1b302 | 596 | /* Sanity check on a regulatory rule */ |
a3d2eaf0 | 597 | static bool is_valid_reg_rule(const struct ieee80211_reg_rule *rule) |
8318d78a | 598 | { |
a3d2eaf0 | 599 | const struct ieee80211_freq_range *freq_range = &rule->freq_range; |
b2e1b302 LR |
600 | u32 freq_diff; |
601 | ||
91e99004 | 602 | if (freq_range->start_freq_khz <= 0 || freq_range->end_freq_khz <= 0) |
b2e1b302 LR |
603 | return false; |
604 | ||
605 | if (freq_range->start_freq_khz > freq_range->end_freq_khz) | |
606 | return false; | |
607 | ||
608 | freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz; | |
609 | ||
bd05f28e | 610 | if (freq_range->end_freq_khz <= freq_range->start_freq_khz || |
1a919318 | 611 | freq_range->max_bandwidth_khz > freq_diff) |
b2e1b302 LR |
612 | return false; |
613 | ||
614 | return true; | |
615 | } | |
616 | ||
a3d2eaf0 | 617 | static bool is_valid_rd(const struct ieee80211_regdomain *rd) |
b2e1b302 | 618 | { |
a3d2eaf0 | 619 | const struct ieee80211_reg_rule *reg_rule = NULL; |
b2e1b302 | 620 | unsigned int i; |
8318d78a | 621 | |
b2e1b302 LR |
622 | if (!rd->n_reg_rules) |
623 | return false; | |
8318d78a | 624 | |
88dc1c3f LR |
625 | if (WARN_ON(rd->n_reg_rules > NL80211_MAX_SUPP_REG_RULES)) |
626 | return false; | |
627 | ||
b2e1b302 LR |
628 | for (i = 0; i < rd->n_reg_rules; i++) { |
629 | reg_rule = &rd->reg_rules[i]; | |
630 | if (!is_valid_reg_rule(reg_rule)) | |
631 | return false; | |
632 | } | |
633 | ||
634 | return true; | |
8318d78a JB |
635 | } |
636 | ||
038659e7 | 637 | static bool reg_does_bw_fit(const struct ieee80211_freq_range *freq_range, |
fe7ef5e9 | 638 | u32 center_freq_khz, u32 bw_khz) |
b2e1b302 | 639 | { |
038659e7 LR |
640 | u32 start_freq_khz, end_freq_khz; |
641 | ||
642 | start_freq_khz = center_freq_khz - (bw_khz/2); | |
643 | end_freq_khz = center_freq_khz + (bw_khz/2); | |
644 | ||
645 | if (start_freq_khz >= freq_range->start_freq_khz && | |
646 | end_freq_khz <= freq_range->end_freq_khz) | |
647 | return true; | |
648 | ||
649 | return false; | |
b2e1b302 | 650 | } |
8318d78a | 651 | |
0c7dc45d LR |
652 | /** |
653 | * freq_in_rule_band - tells us if a frequency is in a frequency band | |
654 | * @freq_range: frequency rule we want to query | |
655 | * @freq_khz: frequency we are inquiring about | |
656 | * | |
657 | * This lets us know if a specific frequency rule is or is not relevant to | |
658 | * a specific frequency's band. Bands are device specific and artificial | |
64629b9d VK |
659 | * definitions (the "2.4 GHz band", the "5 GHz band" and the "60GHz band"), |
660 | * however it is safe for now to assume that a frequency rule should not be | |
661 | * part of a frequency's band if the start freq or end freq are off by more | |
662 | * than 2 GHz for the 2.4 and 5 GHz bands, and by more than 10 GHz for the | |
663 | * 60 GHz band. | |
0c7dc45d LR |
664 | * This resolution can be lowered and should be considered as we add |
665 | * regulatory rule support for other "bands". | |
666 | **/ | |
667 | static bool freq_in_rule_band(const struct ieee80211_freq_range *freq_range, | |
1a919318 | 668 | u32 freq_khz) |
0c7dc45d LR |
669 | { |
670 | #define ONE_GHZ_IN_KHZ 1000000 | |
64629b9d VK |
671 | /* |
672 | * From 802.11ad: directional multi-gigabit (DMG): | |
673 | * Pertaining to operation in a frequency band containing a channel | |
674 | * with the Channel starting frequency above 45 GHz. | |
675 | */ | |
676 | u32 limit = freq_khz > 45 * ONE_GHZ_IN_KHZ ? | |
677 | 10 * ONE_GHZ_IN_KHZ : 2 * ONE_GHZ_IN_KHZ; | |
678 | if (abs(freq_khz - freq_range->start_freq_khz) <= limit) | |
0c7dc45d | 679 | return true; |
64629b9d | 680 | if (abs(freq_khz - freq_range->end_freq_khz) <= limit) |
0c7dc45d LR |
681 | return true; |
682 | return false; | |
683 | #undef ONE_GHZ_IN_KHZ | |
684 | } | |
685 | ||
adbfb058 LR |
686 | /* |
687 | * Later on we can perhaps use the more restrictive DFS | |
688 | * region but we don't have information for that yet so | |
689 | * for now simply disallow conflicts. | |
690 | */ | |
691 | static enum nl80211_dfs_regions | |
692 | reg_intersect_dfs_region(const enum nl80211_dfs_regions dfs_region1, | |
693 | const enum nl80211_dfs_regions dfs_region2) | |
694 | { | |
695 | if (dfs_region1 != dfs_region2) | |
696 | return NL80211_DFS_UNSET; | |
697 | return dfs_region1; | |
698 | } | |
699 | ||
fb1fc7ad LR |
700 | /* |
701 | * Helper for regdom_intersect(), this does the real | |
702 | * mathematical intersection fun | |
703 | */ | |
97524820 JD |
704 | static int reg_rules_intersect(const struct ieee80211_regdomain *rd1, |
705 | const struct ieee80211_regdomain *rd2, | |
706 | const struct ieee80211_reg_rule *rule1, | |
1a919318 JB |
707 | const struct ieee80211_reg_rule *rule2, |
708 | struct ieee80211_reg_rule *intersected_rule) | |
9c96477d LR |
709 | { |
710 | const struct ieee80211_freq_range *freq_range1, *freq_range2; | |
711 | struct ieee80211_freq_range *freq_range; | |
712 | const struct ieee80211_power_rule *power_rule1, *power_rule2; | |
713 | struct ieee80211_power_rule *power_rule; | |
97524820 | 714 | u32 freq_diff, max_bandwidth1, max_bandwidth2; |
9c96477d LR |
715 | |
716 | freq_range1 = &rule1->freq_range; | |
717 | freq_range2 = &rule2->freq_range; | |
718 | freq_range = &intersected_rule->freq_range; | |
719 | ||
720 | power_rule1 = &rule1->power_rule; | |
721 | power_rule2 = &rule2->power_rule; | |
722 | power_rule = &intersected_rule->power_rule; | |
723 | ||
724 | freq_range->start_freq_khz = max(freq_range1->start_freq_khz, | |
1a919318 | 725 | freq_range2->start_freq_khz); |
9c96477d | 726 | freq_range->end_freq_khz = min(freq_range1->end_freq_khz, |
1a919318 | 727 | freq_range2->end_freq_khz); |
97524820 JD |
728 | |
729 | max_bandwidth1 = freq_range1->max_bandwidth_khz; | |
730 | max_bandwidth2 = freq_range2->max_bandwidth_khz; | |
731 | ||
732 | /* | |
733 | * In case max_bandwidth1 == 0 and max_bandwith2 == 0 set | |
734 | * output bandwidth as 0 (auto calculation). Next we will | |
735 | * calculate this correctly in handle_channel function. | |
736 | * In other case calculate output bandwidth here. | |
737 | */ | |
738 | if (max_bandwidth1 || max_bandwidth2) { | |
739 | if (!max_bandwidth1) | |
740 | max_bandwidth1 = reg_get_max_bandwidth(rd1, rule1); | |
741 | if (!max_bandwidth2) | |
742 | max_bandwidth2 = reg_get_max_bandwidth(rd2, rule2); | |
743 | } | |
744 | ||
745 | freq_range->max_bandwidth_khz = min(max_bandwidth1, max_bandwidth2); | |
9c96477d LR |
746 | |
747 | freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz; | |
748 | if (freq_range->max_bandwidth_khz > freq_diff) | |
749 | freq_range->max_bandwidth_khz = freq_diff; | |
750 | ||
751 | power_rule->max_eirp = min(power_rule1->max_eirp, | |
752 | power_rule2->max_eirp); | |
753 | power_rule->max_antenna_gain = min(power_rule1->max_antenna_gain, | |
754 | power_rule2->max_antenna_gain); | |
755 | ||
1a919318 | 756 | intersected_rule->flags = rule1->flags | rule2->flags; |
9c96477d LR |
757 | |
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 |
e702d3cf | 941 | static void chan_reg_rule_print_dbg(struct ieee80211_channel *chan, |
e702d3cf LR |
942 | const struct ieee80211_reg_rule *reg_rule) |
943 | { | |
944 | const struct ieee80211_power_rule *power_rule; | |
945 | const struct ieee80211_freq_range *freq_range; | |
946 | char max_antenna_gain[32]; | |
947 | ||
948 | power_rule = ®_rule->power_rule; | |
949 | freq_range = ®_rule->freq_range; | |
950 | ||
951 | if (!power_rule->max_antenna_gain) | |
952 | snprintf(max_antenna_gain, 32, "N/A"); | |
953 | else | |
954 | snprintf(max_antenna_gain, 32, "%d", power_rule->max_antenna_gain); | |
955 | ||
fe7ef5e9 JB |
956 | REG_DBG_PRINT("Updating information on frequency %d MHz with regulatory rule:\n", |
957 | chan->center_freq); | |
e702d3cf | 958 | |
56e6786e | 959 | REG_DBG_PRINT("%d KHz - %d KHz @ %d KHz), (%s mBi, %d mBm)\n", |
1a919318 JB |
960 | freq_range->start_freq_khz, freq_range->end_freq_khz, |
961 | freq_range->max_bandwidth_khz, max_antenna_gain, | |
e702d3cf LR |
962 | power_rule->max_eirp); |
963 | } | |
964 | #else | |
965 | static void chan_reg_rule_print_dbg(struct ieee80211_channel *chan, | |
e702d3cf LR |
966 | const struct ieee80211_reg_rule *reg_rule) |
967 | { | |
968 | return; | |
969 | } | |
926a0a09 LR |
970 | #endif |
971 | ||
038659e7 LR |
972 | /* |
973 | * Note that right now we assume the desired channel bandwidth | |
974 | * is always 20 MHz for each individual channel (HT40 uses 20 MHz | |
fe7ef5e9 | 975 | * per channel, the primary and the extension channel). |
038659e7 | 976 | */ |
7ca43d03 LR |
977 | static void handle_channel(struct wiphy *wiphy, |
978 | enum nl80211_reg_initiator initiator, | |
fdc9d7b2 | 979 | struct ieee80211_channel *chan) |
b2e1b302 | 980 | { |
038659e7 | 981 | u32 flags, bw_flags = 0; |
b2e1b302 LR |
982 | const struct ieee80211_reg_rule *reg_rule = NULL; |
983 | const struct ieee80211_power_rule *power_rule = NULL; | |
038659e7 | 984 | const struct ieee80211_freq_range *freq_range = NULL; |
fe33eb39 | 985 | struct wiphy *request_wiphy = NULL; |
c492db37 | 986 | struct regulatory_request *lr = get_last_request(); |
97524820 JD |
987 | const struct ieee80211_regdomain *regd; |
988 | u32 max_bandwidth_khz; | |
a92a3ce7 | 989 | |
c492db37 | 990 | request_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx); |
a92a3ce7 LR |
991 | |
992 | flags = chan->orig_flags; | |
b2e1b302 | 993 | |
361c9c8b JB |
994 | reg_rule = freq_reg_info(wiphy, MHZ_TO_KHZ(chan->center_freq)); |
995 | if (IS_ERR(reg_rule)) { | |
ca4ffe8f LR |
996 | /* |
997 | * We will disable all channels that do not match our | |
25985edc | 998 | * received regulatory rule unless the hint is coming |
ca4ffe8f LR |
999 | * from a Country IE and the Country IE had no information |
1000 | * about a band. The IEEE 802.11 spec allows for an AP | |
1001 | * to send only a subset of the regulatory rules allowed, | |
1002 | * so an AP in the US that only supports 2.4 GHz may only send | |
1003 | * a country IE with information for the 2.4 GHz band | |
1004 | * while 5 GHz is still supported. | |
1005 | */ | |
1006 | if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE && | |
361c9c8b | 1007 | PTR_ERR(reg_rule) == -ERANGE) |
ca4ffe8f LR |
1008 | return; |
1009 | ||
cc493e4f LR |
1010 | if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER && |
1011 | request_wiphy && request_wiphy == wiphy && | |
a2f73b6c | 1012 | request_wiphy->regulatory_flags & REGULATORY_STRICT_REG) { |
cc493e4f LR |
1013 | REG_DBG_PRINT("Disabling freq %d MHz for good\n", |
1014 | chan->center_freq); | |
1015 | chan->orig_flags |= IEEE80211_CHAN_DISABLED; | |
1016 | chan->flags = chan->orig_flags; | |
1017 | } else { | |
1018 | REG_DBG_PRINT("Disabling freq %d MHz\n", | |
1019 | chan->center_freq); | |
1020 | chan->flags |= IEEE80211_CHAN_DISABLED; | |
1021 | } | |
8318d78a | 1022 | return; |
ca4ffe8f | 1023 | } |
8318d78a | 1024 | |
fe7ef5e9 | 1025 | chan_reg_rule_print_dbg(chan, reg_rule); |
e702d3cf | 1026 | |
b2e1b302 | 1027 | power_rule = ®_rule->power_rule; |
038659e7 LR |
1028 | freq_range = ®_rule->freq_range; |
1029 | ||
97524820 JD |
1030 | max_bandwidth_khz = freq_range->max_bandwidth_khz; |
1031 | /* Check if auto calculation requested */ | |
1032 | if (!max_bandwidth_khz) { | |
1033 | regd = reg_get_regdomain(wiphy); | |
1034 | max_bandwidth_khz = reg_get_max_bandwidth(regd, reg_rule); | |
1035 | } | |
1036 | ||
1037 | if (max_bandwidth_khz < MHZ_TO_KHZ(40)) | |
038659e7 | 1038 | bw_flags = IEEE80211_CHAN_NO_HT40; |
97524820 | 1039 | if (max_bandwidth_khz < MHZ_TO_KHZ(80)) |
c7a6ee27 | 1040 | bw_flags |= IEEE80211_CHAN_NO_80MHZ; |
97524820 | 1041 | if (max_bandwidth_khz < MHZ_TO_KHZ(160)) |
c7a6ee27 | 1042 | bw_flags |= IEEE80211_CHAN_NO_160MHZ; |
b2e1b302 | 1043 | |
c492db37 | 1044 | if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER && |
806a9e39 | 1045 | request_wiphy && request_wiphy == wiphy && |
a2f73b6c | 1046 | request_wiphy->regulatory_flags & REGULATORY_STRICT_REG) { |
fb1fc7ad | 1047 | /* |
25985edc | 1048 | * This guarantees the driver's requested regulatory domain |
f976376d | 1049 | * will always be used as a base for further regulatory |
fb1fc7ad LR |
1050 | * settings |
1051 | */ | |
f976376d | 1052 | chan->flags = chan->orig_flags = |
038659e7 | 1053 | map_regdom_flags(reg_rule->flags) | bw_flags; |
f976376d LR |
1054 | chan->max_antenna_gain = chan->orig_mag = |
1055 | (int) MBI_TO_DBI(power_rule->max_antenna_gain); | |
279f0f55 | 1056 | chan->max_reg_power = chan->max_power = chan->orig_mpwr = |
f976376d LR |
1057 | (int) MBM_TO_DBM(power_rule->max_eirp); |
1058 | return; | |
1059 | } | |
1060 | ||
04f39047 SW |
1061 | chan->dfs_state = NL80211_DFS_USABLE; |
1062 | chan->dfs_state_entered = jiffies; | |
1063 | ||
aa3d7eef | 1064 | chan->beacon_found = false; |
038659e7 | 1065 | chan->flags = flags | bw_flags | map_regdom_flags(reg_rule->flags); |
1a919318 JB |
1066 | chan->max_antenna_gain = |
1067 | min_t(int, chan->orig_mag, | |
1068 | MBI_TO_DBI(power_rule->max_antenna_gain)); | |
eccc068e | 1069 | chan->max_reg_power = (int) MBM_TO_DBM(power_rule->max_eirp); |
5e31fc08 SG |
1070 | if (chan->orig_mpwr) { |
1071 | /* | |
a09a85a0 LR |
1072 | * Devices that use REGULATORY_COUNTRY_IE_FOLLOW_POWER |
1073 | * will always follow the passed country IE power settings. | |
5e31fc08 SG |
1074 | */ |
1075 | if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE && | |
a09a85a0 | 1076 | wiphy->regulatory_flags & REGULATORY_COUNTRY_IE_FOLLOW_POWER) |
5e31fc08 SG |
1077 | chan->max_power = chan->max_reg_power; |
1078 | else | |
1079 | chan->max_power = min(chan->orig_mpwr, | |
1080 | chan->max_reg_power); | |
1081 | } else | |
1082 | chan->max_power = chan->max_reg_power; | |
8318d78a JB |
1083 | } |
1084 | ||
7ca43d03 | 1085 | static void handle_band(struct wiphy *wiphy, |
fdc9d7b2 JB |
1086 | enum nl80211_reg_initiator initiator, |
1087 | struct ieee80211_supported_band *sband) | |
8318d78a | 1088 | { |
a92a3ce7 | 1089 | unsigned int i; |
a92a3ce7 | 1090 | |
fdc9d7b2 JB |
1091 | if (!sband) |
1092 | return; | |
8318d78a JB |
1093 | |
1094 | for (i = 0; i < sband->n_channels; i++) | |
fdc9d7b2 | 1095 | handle_channel(wiphy, initiator, &sband->channels[i]); |
8318d78a JB |
1096 | } |
1097 | ||
57b5ce07 LR |
1098 | static bool reg_request_cell_base(struct regulatory_request *request) |
1099 | { | |
1100 | if (request->initiator != NL80211_REGDOM_SET_BY_USER) | |
1101 | return false; | |
1a919318 | 1102 | return request->user_reg_hint_type == NL80211_USER_REG_HINT_CELL_BASE; |
57b5ce07 LR |
1103 | } |
1104 | ||
1105 | bool reg_last_request_cell_base(void) | |
1106 | { | |
38fd2143 | 1107 | return reg_request_cell_base(get_last_request()); |
57b5ce07 LR |
1108 | } |
1109 | ||
1110 | #ifdef CONFIG_CFG80211_CERTIFICATION_ONUS | |
57b5ce07 | 1111 | /* Core specific check */ |
2f92212b JB |
1112 | static enum reg_request_treatment |
1113 | reg_ignore_cell_hint(struct regulatory_request *pending_request) | |
57b5ce07 | 1114 | { |
c492db37 JB |
1115 | struct regulatory_request *lr = get_last_request(); |
1116 | ||
57b5ce07 | 1117 | if (!reg_num_devs_support_basehint) |
2f92212b | 1118 | return REG_REQ_IGNORE; |
57b5ce07 | 1119 | |
c492db37 | 1120 | if (reg_request_cell_base(lr) && |
1a919318 | 1121 | !regdom_changes(pending_request->alpha2)) |
2f92212b | 1122 | return REG_REQ_ALREADY_SET; |
1a919318 | 1123 | |
2f92212b | 1124 | return REG_REQ_OK; |
57b5ce07 LR |
1125 | } |
1126 | ||
1127 | /* Device specific check */ | |
1128 | static bool reg_dev_ignore_cell_hint(struct wiphy *wiphy) | |
1129 | { | |
1a919318 | 1130 | return !(wiphy->features & NL80211_FEATURE_CELL_BASE_REG_HINTS); |
57b5ce07 LR |
1131 | } |
1132 | #else | |
1133 | static int reg_ignore_cell_hint(struct regulatory_request *pending_request) | |
1134 | { | |
2f92212b | 1135 | return REG_REQ_IGNORE; |
57b5ce07 | 1136 | } |
1a919318 JB |
1137 | |
1138 | static bool reg_dev_ignore_cell_hint(struct wiphy *wiphy) | |
57b5ce07 LR |
1139 | { |
1140 | return true; | |
1141 | } | |
1142 | #endif | |
1143 | ||
fa1fb9cb LR |
1144 | static bool wiphy_strict_alpha2_regd(struct wiphy *wiphy) |
1145 | { | |
a2f73b6c LR |
1146 | if (wiphy->regulatory_flags & REGULATORY_STRICT_REG && |
1147 | !(wiphy->regulatory_flags & REGULATORY_CUSTOM_REG)) | |
fa1fb9cb LR |
1148 | return true; |
1149 | return false; | |
1150 | } | |
57b5ce07 | 1151 | |
7db90f4a LR |
1152 | static bool ignore_reg_update(struct wiphy *wiphy, |
1153 | enum nl80211_reg_initiator initiator) | |
14b9815a | 1154 | { |
c492db37 JB |
1155 | struct regulatory_request *lr = get_last_request(); |
1156 | ||
1157 | if (!lr) { | |
034c6d6e LR |
1158 | REG_DBG_PRINT("Ignoring regulatory request set by %s " |
1159 | "since last_request is not set\n", | |
926a0a09 | 1160 | reg_initiator_name(initiator)); |
14b9815a | 1161 | return true; |
926a0a09 LR |
1162 | } |
1163 | ||
7db90f4a | 1164 | if (initiator == NL80211_REGDOM_SET_BY_CORE && |
a2f73b6c | 1165 | wiphy->regulatory_flags & REGULATORY_CUSTOM_REG) { |
034c6d6e LR |
1166 | REG_DBG_PRINT("Ignoring regulatory request set by %s " |
1167 | "since the driver uses its own custom " | |
1168 | "regulatory domain\n", | |
926a0a09 | 1169 | reg_initiator_name(initiator)); |
14b9815a | 1170 | return true; |
926a0a09 LR |
1171 | } |
1172 | ||
fb1fc7ad LR |
1173 | /* |
1174 | * wiphy->regd will be set once the device has its own | |
1175 | * desired regulatory domain set | |
1176 | */ | |
fa1fb9cb | 1177 | if (wiphy_strict_alpha2_regd(wiphy) && !wiphy->regd && |
749b527b | 1178 | initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && |
c492db37 | 1179 | !is_world_regdom(lr->alpha2)) { |
034c6d6e LR |
1180 | REG_DBG_PRINT("Ignoring regulatory request set by %s " |
1181 | "since the driver requires its own regulatory " | |
1182 | "domain to be set first\n", | |
926a0a09 | 1183 | reg_initiator_name(initiator)); |
14b9815a | 1184 | return true; |
926a0a09 LR |
1185 | } |
1186 | ||
c492db37 | 1187 | if (reg_request_cell_base(lr)) |
57b5ce07 LR |
1188 | return reg_dev_ignore_cell_hint(wiphy); |
1189 | ||
14b9815a LR |
1190 | return false; |
1191 | } | |
1192 | ||
3195e489 LR |
1193 | static bool reg_is_world_roaming(struct wiphy *wiphy) |
1194 | { | |
1195 | const struct ieee80211_regdomain *cr = get_cfg80211_regdom(); | |
1196 | const struct ieee80211_regdomain *wr = get_wiphy_regdom(wiphy); | |
1197 | struct regulatory_request *lr = get_last_request(); | |
1198 | ||
1199 | if (is_world_regdom(cr->alpha2) || (wr && is_world_regdom(wr->alpha2))) | |
1200 | return true; | |
1201 | ||
1202 | if (lr && lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && | |
a2f73b6c | 1203 | wiphy->regulatory_flags & REGULATORY_CUSTOM_REG) |
3195e489 LR |
1204 | return true; |
1205 | ||
1206 | return false; | |
1207 | } | |
1208 | ||
1a919318 | 1209 | static void handle_reg_beacon(struct wiphy *wiphy, unsigned int chan_idx, |
e38f8a7a LR |
1210 | struct reg_beacon *reg_beacon) |
1211 | { | |
e38f8a7a LR |
1212 | struct ieee80211_supported_band *sband; |
1213 | struct ieee80211_channel *chan; | |
6bad8766 LR |
1214 | bool channel_changed = false; |
1215 | struct ieee80211_channel chan_before; | |
e38f8a7a | 1216 | |
e38f8a7a LR |
1217 | sband = wiphy->bands[reg_beacon->chan.band]; |
1218 | chan = &sband->channels[chan_idx]; | |
1219 | ||
1220 | if (likely(chan->center_freq != reg_beacon->chan.center_freq)) | |
1221 | return; | |
1222 | ||
6bad8766 LR |
1223 | if (chan->beacon_found) |
1224 | return; | |
1225 | ||
1226 | chan->beacon_found = true; | |
1227 | ||
0f500a5f LR |
1228 | if (!reg_is_world_roaming(wiphy)) |
1229 | return; | |
1230 | ||
a2f73b6c | 1231 | if (wiphy->regulatory_flags & REGULATORY_DISABLE_BEACON_HINTS) |
37184244 LR |
1232 | return; |
1233 | ||
6bad8766 LR |
1234 | chan_before.center_freq = chan->center_freq; |
1235 | chan_before.flags = chan->flags; | |
1236 | ||
8fe02e16 LR |
1237 | if (chan->flags & IEEE80211_CHAN_NO_IR) { |
1238 | chan->flags &= ~IEEE80211_CHAN_NO_IR; | |
6bad8766 | 1239 | channel_changed = true; |
e38f8a7a LR |
1240 | } |
1241 | ||
6bad8766 LR |
1242 | if (channel_changed) |
1243 | nl80211_send_beacon_hint_event(wiphy, &chan_before, chan); | |
e38f8a7a LR |
1244 | } |
1245 | ||
1246 | /* | |
1247 | * Called when a scan on a wiphy finds a beacon on | |
1248 | * new channel | |
1249 | */ | |
1250 | static void wiphy_update_new_beacon(struct wiphy *wiphy, | |
1251 | struct reg_beacon *reg_beacon) | |
1252 | { | |
1253 | unsigned int i; | |
1254 | struct ieee80211_supported_band *sband; | |
1255 | ||
e38f8a7a LR |
1256 | if (!wiphy->bands[reg_beacon->chan.band]) |
1257 | return; | |
1258 | ||
1259 | sband = wiphy->bands[reg_beacon->chan.band]; | |
1260 | ||
1261 | for (i = 0; i < sband->n_channels; i++) | |
1262 | handle_reg_beacon(wiphy, i, reg_beacon); | |
1263 | } | |
1264 | ||
1265 | /* | |
1266 | * Called upon reg changes or a new wiphy is added | |
1267 | */ | |
1268 | static void wiphy_update_beacon_reg(struct wiphy *wiphy) | |
1269 | { | |
1270 | unsigned int i; | |
1271 | struct ieee80211_supported_band *sband; | |
1272 | struct reg_beacon *reg_beacon; | |
1273 | ||
e38f8a7a LR |
1274 | list_for_each_entry(reg_beacon, ®_beacon_list, list) { |
1275 | if (!wiphy->bands[reg_beacon->chan.band]) | |
1276 | continue; | |
1277 | sband = wiphy->bands[reg_beacon->chan.band]; | |
1278 | for (i = 0; i < sband->n_channels; i++) | |
1279 | handle_reg_beacon(wiphy, i, reg_beacon); | |
1280 | } | |
1281 | } | |
1282 | ||
e38f8a7a LR |
1283 | /* Reap the advantages of previously found beacons */ |
1284 | static void reg_process_beacons(struct wiphy *wiphy) | |
1285 | { | |
b1ed8ddd LR |
1286 | /* |
1287 | * Means we are just firing up cfg80211, so no beacons would | |
1288 | * have been processed yet. | |
1289 | */ | |
1290 | if (!last_request) | |
1291 | return; | |
e38f8a7a LR |
1292 | wiphy_update_beacon_reg(wiphy); |
1293 | } | |
1294 | ||
1a919318 | 1295 | static bool is_ht40_allowed(struct ieee80211_channel *chan) |
038659e7 LR |
1296 | { |
1297 | if (!chan) | |
1a919318 | 1298 | return false; |
038659e7 | 1299 | if (chan->flags & IEEE80211_CHAN_DISABLED) |
1a919318 | 1300 | return false; |
038659e7 | 1301 | /* This would happen when regulatory rules disallow HT40 completely */ |
55b183ad FF |
1302 | if ((chan->flags & IEEE80211_CHAN_NO_HT40) == IEEE80211_CHAN_NO_HT40) |
1303 | return false; | |
1304 | return true; | |
038659e7 LR |
1305 | } |
1306 | ||
1307 | static void reg_process_ht_flags_channel(struct wiphy *wiphy, | |
fdc9d7b2 | 1308 | struct ieee80211_channel *channel) |
038659e7 | 1309 | { |
fdc9d7b2 | 1310 | struct ieee80211_supported_band *sband = wiphy->bands[channel->band]; |
038659e7 LR |
1311 | struct ieee80211_channel *channel_before = NULL, *channel_after = NULL; |
1312 | unsigned int i; | |
1313 | ||
1a919318 | 1314 | if (!is_ht40_allowed(channel)) { |
038659e7 LR |
1315 | channel->flags |= IEEE80211_CHAN_NO_HT40; |
1316 | return; | |
1317 | } | |
1318 | ||
1319 | /* | |
1320 | * We need to ensure the extension channels exist to | |
1321 | * be able to use HT40- or HT40+, this finds them (or not) | |
1322 | */ | |
1323 | for (i = 0; i < sband->n_channels; i++) { | |
1324 | struct ieee80211_channel *c = &sband->channels[i]; | |
1a919318 | 1325 | |
038659e7 LR |
1326 | if (c->center_freq == (channel->center_freq - 20)) |
1327 | channel_before = c; | |
1328 | if (c->center_freq == (channel->center_freq + 20)) | |
1329 | channel_after = c; | |
1330 | } | |
1331 | ||
1332 | /* | |
1333 | * Please note that this assumes target bandwidth is 20 MHz, | |
1334 | * if that ever changes we also need to change the below logic | |
1335 | * to include that as well. | |
1336 | */ | |
1a919318 | 1337 | if (!is_ht40_allowed(channel_before)) |
689da1b3 | 1338 | channel->flags |= IEEE80211_CHAN_NO_HT40MINUS; |
038659e7 | 1339 | else |
689da1b3 | 1340 | channel->flags &= ~IEEE80211_CHAN_NO_HT40MINUS; |
038659e7 | 1341 | |
1a919318 | 1342 | if (!is_ht40_allowed(channel_after)) |
689da1b3 | 1343 | channel->flags |= IEEE80211_CHAN_NO_HT40PLUS; |
038659e7 | 1344 | else |
689da1b3 | 1345 | channel->flags &= ~IEEE80211_CHAN_NO_HT40PLUS; |
038659e7 LR |
1346 | } |
1347 | ||
1348 | static void reg_process_ht_flags_band(struct wiphy *wiphy, | |
fdc9d7b2 | 1349 | struct ieee80211_supported_band *sband) |
038659e7 LR |
1350 | { |
1351 | unsigned int i; | |
038659e7 | 1352 | |
fdc9d7b2 JB |
1353 | if (!sband) |
1354 | return; | |
038659e7 LR |
1355 | |
1356 | for (i = 0; i < sband->n_channels; i++) | |
fdc9d7b2 | 1357 | reg_process_ht_flags_channel(wiphy, &sband->channels[i]); |
038659e7 LR |
1358 | } |
1359 | ||
1360 | static void reg_process_ht_flags(struct wiphy *wiphy) | |
1361 | { | |
1362 | enum ieee80211_band band; | |
1363 | ||
1364 | if (!wiphy) | |
1365 | return; | |
1366 | ||
fdc9d7b2 JB |
1367 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) |
1368 | reg_process_ht_flags_band(wiphy, wiphy->bands[band]); | |
038659e7 LR |
1369 | } |
1370 | ||
0e3802db LR |
1371 | static void reg_call_notifier(struct wiphy *wiphy, |
1372 | struct regulatory_request *request) | |
1373 | { | |
1374 | if (wiphy->reg_notifier) | |
1375 | wiphy->reg_notifier(wiphy, request); | |
1376 | } | |
1377 | ||
eac03e38 SN |
1378 | static void wiphy_update_regulatory(struct wiphy *wiphy, |
1379 | enum nl80211_reg_initiator initiator) | |
b2e1b302 LR |
1380 | { |
1381 | enum ieee80211_band band; | |
c492db37 | 1382 | struct regulatory_request *lr = get_last_request(); |
eac03e38 | 1383 | |
0e3802db LR |
1384 | if (ignore_reg_update(wiphy, initiator)) { |
1385 | /* | |
1386 | * Regulatory updates set by CORE are ignored for custom | |
1387 | * regulatory cards. Let us notify the changes to the driver, | |
1388 | * as some drivers used this to restore its orig_* reg domain. | |
1389 | */ | |
1390 | if (initiator == NL80211_REGDOM_SET_BY_CORE && | |
a2f73b6c | 1391 | wiphy->regulatory_flags & REGULATORY_CUSTOM_REG) |
0e3802db | 1392 | reg_call_notifier(wiphy, lr); |
a203c2aa | 1393 | return; |
0e3802db | 1394 | } |
a203c2aa | 1395 | |
c492db37 | 1396 | lr->dfs_region = get_cfg80211_regdom()->dfs_region; |
b68e6b3b | 1397 | |
fdc9d7b2 JB |
1398 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) |
1399 | handle_band(wiphy, initiator, wiphy->bands[band]); | |
a203c2aa | 1400 | |
e38f8a7a | 1401 | reg_process_beacons(wiphy); |
038659e7 | 1402 | reg_process_ht_flags(wiphy); |
0e3802db | 1403 | reg_call_notifier(wiphy, lr); |
b2e1b302 LR |
1404 | } |
1405 | ||
d7549cbb SN |
1406 | static void update_all_wiphy_regulatory(enum nl80211_reg_initiator initiator) |
1407 | { | |
1408 | struct cfg80211_registered_device *rdev; | |
4a38994f | 1409 | struct wiphy *wiphy; |
d7549cbb | 1410 | |
5fe231e8 | 1411 | ASSERT_RTNL(); |
458f4f9e | 1412 | |
4a38994f RM |
1413 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) { |
1414 | wiphy = &rdev->wiphy; | |
1415 | wiphy_update_regulatory(wiphy, initiator); | |
4a38994f | 1416 | } |
d7549cbb SN |
1417 | } |
1418 | ||
1fa25e41 | 1419 | static void handle_channel_custom(struct wiphy *wiphy, |
fdc9d7b2 | 1420 | struct ieee80211_channel *chan, |
1fa25e41 LR |
1421 | const struct ieee80211_regdomain *regd) |
1422 | { | |
038659e7 | 1423 | u32 bw_flags = 0; |
1fa25e41 LR |
1424 | const struct ieee80211_reg_rule *reg_rule = NULL; |
1425 | const struct ieee80211_power_rule *power_rule = NULL; | |
038659e7 | 1426 | const struct ieee80211_freq_range *freq_range = NULL; |
97524820 | 1427 | u32 max_bandwidth_khz; |
ac46d48e | 1428 | |
361c9c8b JB |
1429 | reg_rule = freq_reg_info_regd(wiphy, MHZ_TO_KHZ(chan->center_freq), |
1430 | regd); | |
1fa25e41 | 1431 | |
361c9c8b | 1432 | if (IS_ERR(reg_rule)) { |
fe7ef5e9 JB |
1433 | REG_DBG_PRINT("Disabling freq %d MHz as custom regd has no rule that fits it\n", |
1434 | chan->center_freq); | |
cc493e4f LR |
1435 | chan->orig_flags |= IEEE80211_CHAN_DISABLED; |
1436 | chan->flags = chan->orig_flags; | |
1fa25e41 LR |
1437 | return; |
1438 | } | |
1439 | ||
fe7ef5e9 | 1440 | chan_reg_rule_print_dbg(chan, reg_rule); |
e702d3cf | 1441 | |
1fa25e41 | 1442 | power_rule = ®_rule->power_rule; |
038659e7 LR |
1443 | freq_range = ®_rule->freq_range; |
1444 | ||
97524820 JD |
1445 | max_bandwidth_khz = freq_range->max_bandwidth_khz; |
1446 | /* Check if auto calculation requested */ | |
1447 | if (!max_bandwidth_khz) | |
1448 | max_bandwidth_khz = reg_get_max_bandwidth(regd, reg_rule); | |
1449 | ||
1450 | if (max_bandwidth_khz < MHZ_TO_KHZ(40)) | |
038659e7 | 1451 | bw_flags = IEEE80211_CHAN_NO_HT40; |
97524820 | 1452 | if (max_bandwidth_khz < MHZ_TO_KHZ(80)) |
c7a6ee27 | 1453 | bw_flags |= IEEE80211_CHAN_NO_80MHZ; |
97524820 | 1454 | if (max_bandwidth_khz < MHZ_TO_KHZ(160)) |
c7a6ee27 | 1455 | bw_flags |= IEEE80211_CHAN_NO_160MHZ; |
1fa25e41 | 1456 | |
038659e7 | 1457 | chan->flags |= map_regdom_flags(reg_rule->flags) | bw_flags; |
1fa25e41 | 1458 | chan->max_antenna_gain = (int) MBI_TO_DBI(power_rule->max_antenna_gain); |
279f0f55 FF |
1459 | chan->max_reg_power = chan->max_power = |
1460 | (int) MBM_TO_DBM(power_rule->max_eirp); | |
1fa25e41 LR |
1461 | } |
1462 | ||
fdc9d7b2 JB |
1463 | static void handle_band_custom(struct wiphy *wiphy, |
1464 | struct ieee80211_supported_band *sband, | |
1fa25e41 LR |
1465 | const struct ieee80211_regdomain *regd) |
1466 | { | |
1467 | unsigned int i; | |
1fa25e41 | 1468 | |
fdc9d7b2 JB |
1469 | if (!sband) |
1470 | return; | |
1fa25e41 LR |
1471 | |
1472 | for (i = 0; i < sband->n_channels; i++) | |
fdc9d7b2 | 1473 | handle_channel_custom(wiphy, &sband->channels[i], regd); |
1fa25e41 LR |
1474 | } |
1475 | ||
1476 | /* Used by drivers prior to wiphy registration */ | |
1477 | void wiphy_apply_custom_regulatory(struct wiphy *wiphy, | |
1478 | const struct ieee80211_regdomain *regd) | |
1479 | { | |
1480 | enum ieee80211_band band; | |
bbcf3f02 | 1481 | unsigned int bands_set = 0; |
ac46d48e | 1482 | |
a2f73b6c LR |
1483 | WARN(!(wiphy->regulatory_flags & REGULATORY_CUSTOM_REG), |
1484 | "wiphy should have REGULATORY_CUSTOM_REG\n"); | |
1485 | wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG; | |
222ea581 | 1486 | |
1fa25e41 | 1487 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) { |
bbcf3f02 LR |
1488 | if (!wiphy->bands[band]) |
1489 | continue; | |
fdc9d7b2 | 1490 | handle_band_custom(wiphy, wiphy->bands[band], regd); |
bbcf3f02 | 1491 | bands_set++; |
b2e1b302 | 1492 | } |
bbcf3f02 LR |
1493 | |
1494 | /* | |
1495 | * no point in calling this if it won't have any effect | |
1a919318 | 1496 | * on your device's supported bands. |
bbcf3f02 LR |
1497 | */ |
1498 | WARN_ON(!bands_set); | |
b2e1b302 | 1499 | } |
1fa25e41 LR |
1500 | EXPORT_SYMBOL(wiphy_apply_custom_regulatory); |
1501 | ||
b2e253cf LR |
1502 | static void reg_set_request_processed(void) |
1503 | { | |
1504 | bool need_more_processing = false; | |
c492db37 | 1505 | struct regulatory_request *lr = get_last_request(); |
b2e253cf | 1506 | |
c492db37 | 1507 | lr->processed = true; |
b2e253cf LR |
1508 | |
1509 | spin_lock(®_requests_lock); | |
1510 | if (!list_empty(®_requests_list)) | |
1511 | need_more_processing = true; | |
1512 | spin_unlock(®_requests_lock); | |
1513 | ||
c492db37 | 1514 | if (lr->initiator == NL80211_REGDOM_SET_BY_USER) |
fe20b39e | 1515 | cancel_delayed_work(®_timeout); |
a90c7a31 | 1516 | |
b2e253cf LR |
1517 | if (need_more_processing) |
1518 | schedule_work(®_work); | |
1519 | } | |
1520 | ||
b3eb7f3f LR |
1521 | /** |
1522 | * reg_process_hint_core - process core regulatory requests | |
1523 | * @pending_request: a pending core regulatory request | |
1524 | * | |
1525 | * The wireless subsystem can use this function to process | |
1526 | * a regulatory request issued by the regulatory core. | |
1527 | * | |
1528 | * Returns one of the different reg request treatment values. | |
1529 | */ | |
1530 | static enum reg_request_treatment | |
1531 | reg_process_hint_core(struct regulatory_request *core_request) | |
1532 | { | |
b3eb7f3f LR |
1533 | |
1534 | core_request->intersect = false; | |
1535 | core_request->processed = false; | |
5ad6ef5e | 1536 | |
05f1a3ea | 1537 | reg_update_last_request(core_request); |
b3eb7f3f | 1538 | |
fe6631ff | 1539 | return reg_call_crda(core_request); |
b3eb7f3f LR |
1540 | } |
1541 | ||
0d97a619 LR |
1542 | static enum reg_request_treatment |
1543 | __reg_process_hint_user(struct regulatory_request *user_request) | |
1544 | { | |
1545 | struct regulatory_request *lr = get_last_request(); | |
1546 | ||
1547 | if (reg_request_cell_base(user_request)) | |
1548 | return reg_ignore_cell_hint(user_request); | |
1549 | ||
1550 | if (reg_request_cell_base(lr)) | |
1551 | return REG_REQ_IGNORE; | |
1552 | ||
1553 | if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) | |
1554 | return REG_REQ_INTERSECT; | |
1555 | /* | |
1556 | * If the user knows better the user should set the regdom | |
1557 | * to their country before the IE is picked up | |
1558 | */ | |
1559 | if (lr->initiator == NL80211_REGDOM_SET_BY_USER && | |
1560 | lr->intersect) | |
1561 | return REG_REQ_IGNORE; | |
1562 | /* | |
1563 | * Process user requests only after previous user/driver/core | |
1564 | * requests have been processed | |
1565 | */ | |
1566 | if ((lr->initiator == NL80211_REGDOM_SET_BY_CORE || | |
1567 | lr->initiator == NL80211_REGDOM_SET_BY_DRIVER || | |
1568 | lr->initiator == NL80211_REGDOM_SET_BY_USER) && | |
1569 | regdom_changes(lr->alpha2)) | |
1570 | return REG_REQ_IGNORE; | |
1571 | ||
1572 | if (!regdom_changes(user_request->alpha2)) | |
1573 | return REG_REQ_ALREADY_SET; | |
1574 | ||
1575 | return REG_REQ_OK; | |
1576 | } | |
1577 | ||
1578 | /** | |
1579 | * reg_process_hint_user - process user regulatory requests | |
1580 | * @user_request: a pending user regulatory request | |
1581 | * | |
1582 | * The wireless subsystem can use this function to process | |
1583 | * a regulatory request initiated by userspace. | |
1584 | * | |
1585 | * Returns one of the different reg request treatment values. | |
1586 | */ | |
1587 | static enum reg_request_treatment | |
1588 | reg_process_hint_user(struct regulatory_request *user_request) | |
1589 | { | |
1590 | enum reg_request_treatment treatment; | |
0d97a619 LR |
1591 | |
1592 | treatment = __reg_process_hint_user(user_request); | |
1593 | if (treatment == REG_REQ_IGNORE || | |
1594 | treatment == REG_REQ_ALREADY_SET) { | |
1595 | kfree(user_request); | |
1596 | return treatment; | |
1597 | } | |
1598 | ||
0d97a619 LR |
1599 | user_request->intersect = treatment == REG_REQ_INTERSECT; |
1600 | user_request->processed = false; | |
5ad6ef5e | 1601 | |
05f1a3ea | 1602 | reg_update_last_request(user_request); |
0d97a619 LR |
1603 | |
1604 | user_alpha2[0] = user_request->alpha2[0]; | |
1605 | user_alpha2[1] = user_request->alpha2[1]; | |
1606 | ||
fe6631ff | 1607 | return reg_call_crda(user_request); |
0d97a619 LR |
1608 | } |
1609 | ||
21636c7f LR |
1610 | static enum reg_request_treatment |
1611 | __reg_process_hint_driver(struct regulatory_request *driver_request) | |
1612 | { | |
1613 | struct regulatory_request *lr = get_last_request(); | |
1614 | ||
1615 | if (lr->initiator == NL80211_REGDOM_SET_BY_CORE) { | |
1616 | if (regdom_changes(driver_request->alpha2)) | |
1617 | return REG_REQ_OK; | |
1618 | return REG_REQ_ALREADY_SET; | |
1619 | } | |
1620 | ||
1621 | /* | |
1622 | * This would happen if you unplug and plug your card | |
1623 | * back in or if you add a new device for which the previously | |
1624 | * loaded card also agrees on the regulatory domain. | |
1625 | */ | |
1626 | if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER && | |
1627 | !regdom_changes(driver_request->alpha2)) | |
1628 | return REG_REQ_ALREADY_SET; | |
1629 | ||
1630 | return REG_REQ_INTERSECT; | |
1631 | } | |
1632 | ||
1633 | /** | |
1634 | * reg_process_hint_driver - process driver regulatory requests | |
1635 | * @driver_request: a pending driver regulatory request | |
1636 | * | |
1637 | * The wireless subsystem can use this function to process | |
1638 | * a regulatory request issued by an 802.11 driver. | |
1639 | * | |
1640 | * Returns one of the different reg request treatment values. | |
1641 | */ | |
1642 | static enum reg_request_treatment | |
1643 | reg_process_hint_driver(struct wiphy *wiphy, | |
1644 | struct regulatory_request *driver_request) | |
1645 | { | |
1646 | const struct ieee80211_regdomain *regd; | |
1647 | enum reg_request_treatment treatment; | |
21636c7f LR |
1648 | |
1649 | treatment = __reg_process_hint_driver(driver_request); | |
1650 | ||
1651 | switch (treatment) { | |
1652 | case REG_REQ_OK: | |
1653 | break; | |
1654 | case REG_REQ_IGNORE: | |
1655 | kfree(driver_request); | |
1656 | return treatment; | |
1657 | case REG_REQ_INTERSECT: | |
1658 | /* fall through */ | |
1659 | case REG_REQ_ALREADY_SET: | |
1660 | regd = reg_copy_regd(get_cfg80211_regdom()); | |
1661 | if (IS_ERR(regd)) { | |
1662 | kfree(driver_request); | |
1663 | return REG_REQ_IGNORE; | |
1664 | } | |
1665 | rcu_assign_pointer(wiphy->regd, regd); | |
1666 | } | |
1667 | ||
21636c7f LR |
1668 | |
1669 | driver_request->intersect = treatment == REG_REQ_INTERSECT; | |
1670 | driver_request->processed = false; | |
5ad6ef5e | 1671 | |
05f1a3ea | 1672 | reg_update_last_request(driver_request); |
21636c7f LR |
1673 | |
1674 | /* | |
1675 | * Since CRDA will not be called in this case as we already | |
1676 | * have applied the requested regulatory domain before we just | |
1677 | * inform userspace we have processed the request | |
1678 | */ | |
1679 | if (treatment == REG_REQ_ALREADY_SET) { | |
1680 | nl80211_send_reg_change_event(driver_request); | |
1681 | reg_set_request_processed(); | |
1682 | return treatment; | |
1683 | } | |
1684 | ||
fe6631ff | 1685 | return reg_call_crda(driver_request); |
21636c7f LR |
1686 | } |
1687 | ||
b23e7a9e LR |
1688 | static enum reg_request_treatment |
1689 | __reg_process_hint_country_ie(struct wiphy *wiphy, | |
1690 | struct regulatory_request *country_ie_request) | |
1691 | { | |
1692 | struct wiphy *last_wiphy = NULL; | |
1693 | struct regulatory_request *lr = get_last_request(); | |
1694 | ||
1695 | if (reg_request_cell_base(lr)) { | |
1696 | /* Trust a Cell base station over the AP's country IE */ | |
1697 | if (regdom_changes(country_ie_request->alpha2)) | |
1698 | return REG_REQ_IGNORE; | |
1699 | return REG_REQ_ALREADY_SET; | |
2a901468 LR |
1700 | } else { |
1701 | if (wiphy->regulatory_flags & REGULATORY_COUNTRY_IE_IGNORE) | |
1702 | return REG_REQ_IGNORE; | |
b23e7a9e LR |
1703 | } |
1704 | ||
b23e7a9e LR |
1705 | if (unlikely(!is_an_alpha2(country_ie_request->alpha2))) |
1706 | return -EINVAL; | |
2f1c6c57 LR |
1707 | |
1708 | if (lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE) | |
1709 | return REG_REQ_OK; | |
1710 | ||
1711 | last_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx); | |
1712 | ||
1713 | if (last_wiphy != wiphy) { | |
b23e7a9e | 1714 | /* |
2f1c6c57 LR |
1715 | * Two cards with two APs claiming different |
1716 | * Country IE alpha2s. We could | |
1717 | * intersect them, but that seems unlikely | |
1718 | * to be correct. Reject second one for now. | |
b23e7a9e | 1719 | */ |
2f1c6c57 LR |
1720 | if (regdom_changes(country_ie_request->alpha2)) |
1721 | return REG_REQ_IGNORE; | |
b23e7a9e LR |
1722 | return REG_REQ_ALREADY_SET; |
1723 | } | |
2f1c6c57 LR |
1724 | /* |
1725 | * Two consecutive Country IE hints on the same wiphy. | |
1726 | * This should be picked up early by the driver/stack | |
1727 | */ | |
1728 | if (WARN_ON(regdom_changes(country_ie_request->alpha2))) | |
1729 | return REG_REQ_OK; | |
1730 | return REG_REQ_ALREADY_SET; | |
b23e7a9e LR |
1731 | } |
1732 | ||
d1c96a9a | 1733 | /** |
b23e7a9e LR |
1734 | * reg_process_hint_country_ie - process regulatory requests from country IEs |
1735 | * @country_ie_request: a regulatory request from a country IE | |
d1c96a9a | 1736 | * |
b23e7a9e LR |
1737 | * The wireless subsystem can use this function to process |
1738 | * a regulatory request issued by a country Information Element. | |
d1c96a9a | 1739 | * |
2f92212b | 1740 | * Returns one of the different reg request treatment values. |
d1c96a9a | 1741 | */ |
2f92212b | 1742 | static enum reg_request_treatment |
b23e7a9e LR |
1743 | reg_process_hint_country_ie(struct wiphy *wiphy, |
1744 | struct regulatory_request *country_ie_request) | |
b2e1b302 | 1745 | { |
2f92212b | 1746 | enum reg_request_treatment treatment; |
761cf7ec | 1747 | |
b23e7a9e | 1748 | treatment = __reg_process_hint_country_ie(wiphy, country_ie_request); |
9c96477d | 1749 | |
2f92212b | 1750 | switch (treatment) { |
2f92212b JB |
1751 | case REG_REQ_OK: |
1752 | break; | |
b23e7a9e LR |
1753 | case REG_REQ_IGNORE: |
1754 | /* fall through */ | |
1755 | case REG_REQ_ALREADY_SET: | |
1756 | kfree(country_ie_request); | |
1757 | return treatment; | |
1758 | case REG_REQ_INTERSECT: | |
1759 | kfree(country_ie_request); | |
fb1fc7ad | 1760 | /* |
b23e7a9e LR |
1761 | * This doesn't happen yet, not sure we |
1762 | * ever want to support it for this case. | |
fb1fc7ad | 1763 | */ |
b23e7a9e LR |
1764 | WARN_ONCE(1, "Unexpected intersection for country IEs"); |
1765 | return REG_REQ_IGNORE; | |
3e0c3ff3 | 1766 | } |
b2e1b302 | 1767 | |
b23e7a9e LR |
1768 | country_ie_request->intersect = false; |
1769 | country_ie_request->processed = false; | |
5ad6ef5e | 1770 | |
05f1a3ea | 1771 | reg_update_last_request(country_ie_request); |
3e0c3ff3 | 1772 | |
fe6631ff | 1773 | return reg_call_crda(country_ie_request); |
b2e1b302 LR |
1774 | } |
1775 | ||
30a548c7 | 1776 | /* This processes *all* regulatory hints */ |
1daa37c7 | 1777 | static void reg_process_hint(struct regulatory_request *reg_request) |
fe33eb39 | 1778 | { |
fe33eb39 | 1779 | struct wiphy *wiphy = NULL; |
b3eb7f3f | 1780 | enum reg_request_treatment treatment; |
fe33eb39 | 1781 | |
f4173766 | 1782 | if (reg_request->wiphy_idx != WIPHY_IDX_INVALID) |
fe33eb39 LR |
1783 | wiphy = wiphy_idx_to_wiphy(reg_request->wiphy_idx); |
1784 | ||
b3eb7f3f LR |
1785 | switch (reg_request->initiator) { |
1786 | case NL80211_REGDOM_SET_BY_CORE: | |
1787 | reg_process_hint_core(reg_request); | |
1788 | return; | |
1789 | case NL80211_REGDOM_SET_BY_USER: | |
0d97a619 LR |
1790 | treatment = reg_process_hint_user(reg_request); |
1791 | if (treatment == REG_REQ_OK || | |
1792 | treatment == REG_REQ_ALREADY_SET) | |
1793 | return; | |
845f3351 SD |
1794 | queue_delayed_work(system_power_efficient_wq, |
1795 | ®_timeout, msecs_to_jiffies(3142)); | |
0d97a619 | 1796 | return; |
b3eb7f3f | 1797 | case NL80211_REGDOM_SET_BY_DRIVER: |
772f0389 IP |
1798 | if (!wiphy) |
1799 | goto out_free; | |
21636c7f LR |
1800 | treatment = reg_process_hint_driver(wiphy, reg_request); |
1801 | break; | |
b3eb7f3f | 1802 | case NL80211_REGDOM_SET_BY_COUNTRY_IE: |
772f0389 IP |
1803 | if (!wiphy) |
1804 | goto out_free; | |
b23e7a9e | 1805 | treatment = reg_process_hint_country_ie(wiphy, reg_request); |
b3eb7f3f LR |
1806 | break; |
1807 | default: | |
1808 | WARN(1, "invalid initiator %d\n", reg_request->initiator); | |
772f0389 | 1809 | goto out_free; |
b3eb7f3f LR |
1810 | } |
1811 | ||
b23e7a9e LR |
1812 | /* This is required so that the orig_* parameters are saved */ |
1813 | if (treatment == REG_REQ_ALREADY_SET && wiphy && | |
a2f73b6c | 1814 | wiphy->regulatory_flags & REGULATORY_STRICT_REG) |
b23e7a9e | 1815 | wiphy_update_regulatory(wiphy, reg_request->initiator); |
772f0389 IP |
1816 | |
1817 | return; | |
1818 | ||
1819 | out_free: | |
1820 | kfree(reg_request); | |
fe33eb39 LR |
1821 | } |
1822 | ||
b2e253cf LR |
1823 | /* |
1824 | * Processes regulatory hints, this is all the NL80211_REGDOM_SET_BY_* | |
1825 | * Regulatory hints come on a first come first serve basis and we | |
1826 | * must process each one atomically. | |
1827 | */ | |
fe33eb39 | 1828 | static void reg_process_pending_hints(void) |
b0e2880b | 1829 | { |
c492db37 | 1830 | struct regulatory_request *reg_request, *lr; |
fe33eb39 | 1831 | |
c492db37 | 1832 | lr = get_last_request(); |
b0e2880b | 1833 | |
b2e253cf | 1834 | /* When last_request->processed becomes true this will be rescheduled */ |
c492db37 | 1835 | if (lr && !lr->processed) { |
1a919318 | 1836 | REG_DBG_PRINT("Pending regulatory request, waiting for it to be processed...\n"); |
5fe231e8 | 1837 | return; |
b2e253cf LR |
1838 | } |
1839 | ||
fe33eb39 | 1840 | spin_lock(®_requests_lock); |
fe33eb39 | 1841 | |
b2e253cf | 1842 | if (list_empty(®_requests_list)) { |
d951c1dd | 1843 | spin_unlock(®_requests_lock); |
5fe231e8 | 1844 | return; |
fe33eb39 | 1845 | } |
b2e253cf LR |
1846 | |
1847 | reg_request = list_first_entry(®_requests_list, | |
1848 | struct regulatory_request, | |
1849 | list); | |
1850 | list_del_init(®_request->list); | |
1851 | ||
fe33eb39 | 1852 | spin_unlock(®_requests_lock); |
b0e2880b | 1853 | |
1daa37c7 | 1854 | reg_process_hint(reg_request); |
fe33eb39 LR |
1855 | } |
1856 | ||
e38f8a7a LR |
1857 | /* Processes beacon hints -- this has nothing to do with country IEs */ |
1858 | static void reg_process_pending_beacon_hints(void) | |
1859 | { | |
79c97e97 | 1860 | struct cfg80211_registered_device *rdev; |
e38f8a7a LR |
1861 | struct reg_beacon *pending_beacon, *tmp; |
1862 | ||
e38f8a7a LR |
1863 | /* This goes through the _pending_ beacon list */ |
1864 | spin_lock_bh(®_pending_beacons_lock); | |
1865 | ||
e38f8a7a LR |
1866 | list_for_each_entry_safe(pending_beacon, tmp, |
1867 | ®_pending_beacons, list) { | |
e38f8a7a LR |
1868 | list_del_init(&pending_beacon->list); |
1869 | ||
1870 | /* Applies the beacon hint to current wiphys */ | |
79c97e97 JB |
1871 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) |
1872 | wiphy_update_new_beacon(&rdev->wiphy, pending_beacon); | |
e38f8a7a LR |
1873 | |
1874 | /* Remembers the beacon hint for new wiphys or reg changes */ | |
1875 | list_add_tail(&pending_beacon->list, ®_beacon_list); | |
1876 | } | |
1877 | ||
1878 | spin_unlock_bh(®_pending_beacons_lock); | |
e38f8a7a LR |
1879 | } |
1880 | ||
fe33eb39 LR |
1881 | static void reg_todo(struct work_struct *work) |
1882 | { | |
5fe231e8 | 1883 | rtnl_lock(); |
fe33eb39 | 1884 | reg_process_pending_hints(); |
e38f8a7a | 1885 | reg_process_pending_beacon_hints(); |
5fe231e8 | 1886 | rtnl_unlock(); |
fe33eb39 LR |
1887 | } |
1888 | ||
fe33eb39 LR |
1889 | static void queue_regulatory_request(struct regulatory_request *request) |
1890 | { | |
d4f2c881 JB |
1891 | request->alpha2[0] = toupper(request->alpha2[0]); |
1892 | request->alpha2[1] = toupper(request->alpha2[1]); | |
c61029c7 | 1893 | |
fe33eb39 LR |
1894 | spin_lock(®_requests_lock); |
1895 | list_add_tail(&request->list, ®_requests_list); | |
1896 | spin_unlock(®_requests_lock); | |
1897 | ||
1898 | schedule_work(®_work); | |
1899 | } | |
1900 | ||
09d989d1 LR |
1901 | /* |
1902 | * Core regulatory hint -- happens during cfg80211_init() | |
1903 | * and when we restore regulatory settings. | |
1904 | */ | |
ba25c141 LR |
1905 | static int regulatory_hint_core(const char *alpha2) |
1906 | { | |
1907 | struct regulatory_request *request; | |
1908 | ||
1a919318 | 1909 | request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); |
ba25c141 LR |
1910 | if (!request) |
1911 | return -ENOMEM; | |
1912 | ||
1913 | request->alpha2[0] = alpha2[0]; | |
1914 | request->alpha2[1] = alpha2[1]; | |
7db90f4a | 1915 | request->initiator = NL80211_REGDOM_SET_BY_CORE; |
ba25c141 | 1916 | |
31e99729 | 1917 | queue_regulatory_request(request); |
5078b2e3 | 1918 | |
fe33eb39 | 1919 | return 0; |
ba25c141 LR |
1920 | } |
1921 | ||
fe33eb39 | 1922 | /* User hints */ |
57b5ce07 LR |
1923 | int regulatory_hint_user(const char *alpha2, |
1924 | enum nl80211_user_reg_hint_type user_reg_hint_type) | |
b2e1b302 | 1925 | { |
fe33eb39 LR |
1926 | struct regulatory_request *request; |
1927 | ||
fdc9d7b2 JB |
1928 | if (WARN_ON(!alpha2)) |
1929 | return -EINVAL; | |
b2e1b302 | 1930 | |
fe33eb39 LR |
1931 | request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); |
1932 | if (!request) | |
1933 | return -ENOMEM; | |
1934 | ||
f4173766 | 1935 | request->wiphy_idx = WIPHY_IDX_INVALID; |
fe33eb39 LR |
1936 | request->alpha2[0] = alpha2[0]; |
1937 | request->alpha2[1] = alpha2[1]; | |
e12822e1 | 1938 | request->initiator = NL80211_REGDOM_SET_BY_USER; |
57b5ce07 | 1939 | request->user_reg_hint_type = user_reg_hint_type; |
fe33eb39 LR |
1940 | |
1941 | queue_regulatory_request(request); | |
1942 | ||
1943 | return 0; | |
1944 | } | |
1945 | ||
1946 | /* Driver hints */ | |
1947 | int regulatory_hint(struct wiphy *wiphy, const char *alpha2) | |
1948 | { | |
1949 | struct regulatory_request *request; | |
1950 | ||
fdc9d7b2 JB |
1951 | if (WARN_ON(!alpha2 || !wiphy)) |
1952 | return -EINVAL; | |
fe33eb39 | 1953 | |
4f7b9140 LR |
1954 | wiphy->regulatory_flags &= ~REGULATORY_CUSTOM_REG; |
1955 | ||
fe33eb39 LR |
1956 | request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); |
1957 | if (!request) | |
1958 | return -ENOMEM; | |
1959 | ||
1960 | request->wiphy_idx = get_wiphy_idx(wiphy); | |
1961 | ||
fe33eb39 LR |
1962 | request->alpha2[0] = alpha2[0]; |
1963 | request->alpha2[1] = alpha2[1]; | |
7db90f4a | 1964 | request->initiator = NL80211_REGDOM_SET_BY_DRIVER; |
fe33eb39 LR |
1965 | |
1966 | queue_regulatory_request(request); | |
1967 | ||
1968 | return 0; | |
b2e1b302 LR |
1969 | } |
1970 | EXPORT_SYMBOL(regulatory_hint); | |
1971 | ||
789fd033 LR |
1972 | void regulatory_hint_country_ie(struct wiphy *wiphy, enum ieee80211_band band, |
1973 | const u8 *country_ie, u8 country_ie_len) | |
3f2355cb | 1974 | { |
3f2355cb | 1975 | char alpha2[2]; |
3f2355cb | 1976 | enum environment_cap env = ENVIRON_ANY; |
db2424c5 | 1977 | struct regulatory_request *request = NULL, *lr; |
d335fe63 | 1978 | |
3f2355cb LR |
1979 | /* IE len must be evenly divisible by 2 */ |
1980 | if (country_ie_len & 0x01) | |
db2424c5 | 1981 | return; |
3f2355cb LR |
1982 | |
1983 | if (country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN) | |
db2424c5 JB |
1984 | return; |
1985 | ||
1986 | request = kzalloc(sizeof(*request), GFP_KERNEL); | |
1987 | if (!request) | |
1988 | return; | |
3f2355cb | 1989 | |
3f2355cb LR |
1990 | alpha2[0] = country_ie[0]; |
1991 | alpha2[1] = country_ie[1]; | |
1992 | ||
1993 | if (country_ie[2] == 'I') | |
1994 | env = ENVIRON_INDOOR; | |
1995 | else if (country_ie[2] == 'O') | |
1996 | env = ENVIRON_OUTDOOR; | |
1997 | ||
db2424c5 JB |
1998 | rcu_read_lock(); |
1999 | lr = get_last_request(); | |
2000 | ||
2001 | if (unlikely(!lr)) | |
2002 | goto out; | |
2003 | ||
fb1fc7ad | 2004 | /* |
8b19e6ca | 2005 | * We will run this only upon a successful connection on cfg80211. |
4b44c8bc | 2006 | * We leave conflict resolution to the workqueue, where can hold |
5fe231e8 | 2007 | * the RTNL. |
fb1fc7ad | 2008 | */ |
c492db37 JB |
2009 | if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE && |
2010 | lr->wiphy_idx != WIPHY_IDX_INVALID) | |
4b44c8bc | 2011 | goto out; |
3f2355cb | 2012 | |
fe33eb39 | 2013 | request->wiphy_idx = get_wiphy_idx(wiphy); |
4f366c5d JL |
2014 | request->alpha2[0] = alpha2[0]; |
2015 | request->alpha2[1] = alpha2[1]; | |
7db90f4a | 2016 | request->initiator = NL80211_REGDOM_SET_BY_COUNTRY_IE; |
fe33eb39 LR |
2017 | request->country_ie_env = env; |
2018 | ||
fe33eb39 | 2019 | queue_regulatory_request(request); |
db2424c5 | 2020 | request = NULL; |
3f2355cb | 2021 | out: |
db2424c5 JB |
2022 | kfree(request); |
2023 | rcu_read_unlock(); | |
3f2355cb | 2024 | } |
b2e1b302 | 2025 | |
09d989d1 LR |
2026 | static void restore_alpha2(char *alpha2, bool reset_user) |
2027 | { | |
2028 | /* indicates there is no alpha2 to consider for restoration */ | |
2029 | alpha2[0] = '9'; | |
2030 | alpha2[1] = '7'; | |
2031 | ||
2032 | /* The user setting has precedence over the module parameter */ | |
2033 | if (is_user_regdom_saved()) { | |
2034 | /* Unless we're asked to ignore it and reset it */ | |
2035 | if (reset_user) { | |
1a919318 | 2036 | REG_DBG_PRINT("Restoring regulatory settings including user preference\n"); |
09d989d1 LR |
2037 | user_alpha2[0] = '9'; |
2038 | user_alpha2[1] = '7'; | |
2039 | ||
2040 | /* | |
2041 | * If we're ignoring user settings, we still need to | |
2042 | * check the module parameter to ensure we put things | |
2043 | * back as they were for a full restore. | |
2044 | */ | |
2045 | if (!is_world_regdom(ieee80211_regdom)) { | |
1a919318 JB |
2046 | REG_DBG_PRINT("Keeping preference on module parameter ieee80211_regdom: %c%c\n", |
2047 | ieee80211_regdom[0], ieee80211_regdom[1]); | |
09d989d1 LR |
2048 | alpha2[0] = ieee80211_regdom[0]; |
2049 | alpha2[1] = ieee80211_regdom[1]; | |
2050 | } | |
2051 | } else { | |
1a919318 JB |
2052 | REG_DBG_PRINT("Restoring regulatory settings while preserving user preference for: %c%c\n", |
2053 | user_alpha2[0], user_alpha2[1]); | |
09d989d1 LR |
2054 | alpha2[0] = user_alpha2[0]; |
2055 | alpha2[1] = user_alpha2[1]; | |
2056 | } | |
2057 | } else if (!is_world_regdom(ieee80211_regdom)) { | |
1a919318 JB |
2058 | REG_DBG_PRINT("Keeping preference on module parameter ieee80211_regdom: %c%c\n", |
2059 | ieee80211_regdom[0], ieee80211_regdom[1]); | |
09d989d1 LR |
2060 | alpha2[0] = ieee80211_regdom[0]; |
2061 | alpha2[1] = ieee80211_regdom[1]; | |
2062 | } else | |
d91e41b6 | 2063 | REG_DBG_PRINT("Restoring regulatory settings\n"); |
09d989d1 LR |
2064 | } |
2065 | ||
5ce543d1 RM |
2066 | static void restore_custom_reg_settings(struct wiphy *wiphy) |
2067 | { | |
2068 | struct ieee80211_supported_band *sband; | |
2069 | enum ieee80211_band band; | |
2070 | struct ieee80211_channel *chan; | |
2071 | int i; | |
2072 | ||
2073 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) { | |
2074 | sband = wiphy->bands[band]; | |
2075 | if (!sband) | |
2076 | continue; | |
2077 | for (i = 0; i < sband->n_channels; i++) { | |
2078 | chan = &sband->channels[i]; | |
2079 | chan->flags = chan->orig_flags; | |
2080 | chan->max_antenna_gain = chan->orig_mag; | |
2081 | chan->max_power = chan->orig_mpwr; | |
899852af | 2082 | chan->beacon_found = false; |
5ce543d1 RM |
2083 | } |
2084 | } | |
2085 | } | |
2086 | ||
09d989d1 LR |
2087 | /* |
2088 | * Restoring regulatory settings involves ingoring any | |
2089 | * possibly stale country IE information and user regulatory | |
2090 | * settings if so desired, this includes any beacon hints | |
2091 | * learned as we could have traveled outside to another country | |
2092 | * after disconnection. To restore regulatory settings we do | |
2093 | * exactly what we did at bootup: | |
2094 | * | |
2095 | * - send a core regulatory hint | |
2096 | * - send a user regulatory hint if applicable | |
2097 | * | |
2098 | * Device drivers that send a regulatory hint for a specific country | |
2099 | * keep their own regulatory domain on wiphy->regd so that does does | |
2100 | * not need to be remembered. | |
2101 | */ | |
2102 | static void restore_regulatory_settings(bool reset_user) | |
2103 | { | |
2104 | char alpha2[2]; | |
cee0bec5 | 2105 | char world_alpha2[2]; |
09d989d1 | 2106 | struct reg_beacon *reg_beacon, *btmp; |
14609555 LR |
2107 | struct regulatory_request *reg_request, *tmp; |
2108 | LIST_HEAD(tmp_reg_req_list); | |
5ce543d1 | 2109 | struct cfg80211_registered_device *rdev; |
09d989d1 | 2110 | |
5fe231e8 JB |
2111 | ASSERT_RTNL(); |
2112 | ||
2d319867 | 2113 | reset_regdomains(true, &world_regdom); |
09d989d1 LR |
2114 | restore_alpha2(alpha2, reset_user); |
2115 | ||
14609555 LR |
2116 | /* |
2117 | * If there's any pending requests we simply | |
2118 | * stash them to a temporary pending queue and | |
2119 | * add then after we've restored regulatory | |
2120 | * settings. | |
2121 | */ | |
2122 | spin_lock(®_requests_lock); | |
fea9bced JB |
2123 | list_for_each_entry_safe(reg_request, tmp, ®_requests_list, list) { |
2124 | if (reg_request->initiator != NL80211_REGDOM_SET_BY_USER) | |
2125 | continue; | |
2126 | list_move_tail(®_request->list, &tmp_reg_req_list); | |
14609555 LR |
2127 | } |
2128 | spin_unlock(®_requests_lock); | |
2129 | ||
09d989d1 LR |
2130 | /* Clear beacon hints */ |
2131 | spin_lock_bh(®_pending_beacons_lock); | |
fea9bced JB |
2132 | list_for_each_entry_safe(reg_beacon, btmp, ®_pending_beacons, list) { |
2133 | list_del(®_beacon->list); | |
2134 | kfree(reg_beacon); | |
09d989d1 LR |
2135 | } |
2136 | spin_unlock_bh(®_pending_beacons_lock); | |
2137 | ||
fea9bced JB |
2138 | list_for_each_entry_safe(reg_beacon, btmp, ®_beacon_list, list) { |
2139 | list_del(®_beacon->list); | |
2140 | kfree(reg_beacon); | |
09d989d1 LR |
2141 | } |
2142 | ||
2143 | /* First restore to the basic regulatory settings */ | |
379b82f4 JB |
2144 | world_alpha2[0] = cfg80211_world_regdom->alpha2[0]; |
2145 | world_alpha2[1] = cfg80211_world_regdom->alpha2[1]; | |
09d989d1 | 2146 | |
5ce543d1 | 2147 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) { |
a2f73b6c | 2148 | if (rdev->wiphy.regulatory_flags & REGULATORY_CUSTOM_REG) |
5ce543d1 RM |
2149 | restore_custom_reg_settings(&rdev->wiphy); |
2150 | } | |
2151 | ||
cee0bec5 | 2152 | regulatory_hint_core(world_alpha2); |
09d989d1 LR |
2153 | |
2154 | /* | |
2155 | * This restores the ieee80211_regdom module parameter | |
2156 | * preference or the last user requested regulatory | |
2157 | * settings, user regulatory settings takes precedence. | |
2158 | */ | |
2159 | if (is_an_alpha2(alpha2)) | |
57b5ce07 | 2160 | regulatory_hint_user(user_alpha2, NL80211_USER_REG_HINT_USER); |
09d989d1 | 2161 | |
14609555 | 2162 | spin_lock(®_requests_lock); |
11cff96c | 2163 | list_splice_tail_init(&tmp_reg_req_list, ®_requests_list); |
14609555 LR |
2164 | spin_unlock(®_requests_lock); |
2165 | ||
14609555 LR |
2166 | REG_DBG_PRINT("Kicking the queue\n"); |
2167 | ||
2168 | schedule_work(®_work); | |
2169 | } | |
09d989d1 LR |
2170 | |
2171 | void regulatory_hint_disconnect(void) | |
2172 | { | |
1a919318 | 2173 | REG_DBG_PRINT("All devices are disconnected, going to restore regulatory settings\n"); |
09d989d1 LR |
2174 | restore_regulatory_settings(false); |
2175 | } | |
2176 | ||
e38f8a7a LR |
2177 | static bool freq_is_chan_12_13_14(u16 freq) |
2178 | { | |
59eb21a6 BR |
2179 | if (freq == ieee80211_channel_to_frequency(12, IEEE80211_BAND_2GHZ) || |
2180 | freq == ieee80211_channel_to_frequency(13, IEEE80211_BAND_2GHZ) || | |
2181 | freq == ieee80211_channel_to_frequency(14, IEEE80211_BAND_2GHZ)) | |
e38f8a7a LR |
2182 | return true; |
2183 | return false; | |
2184 | } | |
2185 | ||
3ebfa6e7 LR |
2186 | static bool pending_reg_beacon(struct ieee80211_channel *beacon_chan) |
2187 | { | |
2188 | struct reg_beacon *pending_beacon; | |
2189 | ||
2190 | list_for_each_entry(pending_beacon, ®_pending_beacons, list) | |
2191 | if (beacon_chan->center_freq == | |
2192 | pending_beacon->chan.center_freq) | |
2193 | return true; | |
2194 | return false; | |
2195 | } | |
2196 | ||
e38f8a7a LR |
2197 | int regulatory_hint_found_beacon(struct wiphy *wiphy, |
2198 | struct ieee80211_channel *beacon_chan, | |
2199 | gfp_t gfp) | |
2200 | { | |
2201 | struct reg_beacon *reg_beacon; | |
3ebfa6e7 | 2202 | bool processing; |
e38f8a7a | 2203 | |
1a919318 JB |
2204 | if (beacon_chan->beacon_found || |
2205 | beacon_chan->flags & IEEE80211_CHAN_RADAR || | |
e38f8a7a | 2206 | (beacon_chan->band == IEEE80211_BAND_2GHZ && |
1a919318 | 2207 | !freq_is_chan_12_13_14(beacon_chan->center_freq))) |
e38f8a7a LR |
2208 | return 0; |
2209 | ||
3ebfa6e7 LR |
2210 | spin_lock_bh(®_pending_beacons_lock); |
2211 | processing = pending_reg_beacon(beacon_chan); | |
2212 | spin_unlock_bh(®_pending_beacons_lock); | |
2213 | ||
2214 | if (processing) | |
e38f8a7a LR |
2215 | return 0; |
2216 | ||
2217 | reg_beacon = kzalloc(sizeof(struct reg_beacon), gfp); | |
2218 | if (!reg_beacon) | |
2219 | return -ENOMEM; | |
2220 | ||
1a919318 | 2221 | REG_DBG_PRINT("Found new beacon on frequency: %d MHz (Ch %d) on %s\n", |
4113f751 LR |
2222 | beacon_chan->center_freq, |
2223 | ieee80211_frequency_to_channel(beacon_chan->center_freq), | |
2224 | wiphy_name(wiphy)); | |
2225 | ||
e38f8a7a | 2226 | memcpy(®_beacon->chan, beacon_chan, |
1a919318 | 2227 | sizeof(struct ieee80211_channel)); |
e38f8a7a LR |
2228 | |
2229 | /* | |
2230 | * Since we can be called from BH or and non-BH context | |
2231 | * we must use spin_lock_bh() | |
2232 | */ | |
2233 | spin_lock_bh(®_pending_beacons_lock); | |
2234 | list_add_tail(®_beacon->list, ®_pending_beacons); | |
2235 | spin_unlock_bh(®_pending_beacons_lock); | |
2236 | ||
2237 | schedule_work(®_work); | |
2238 | ||
2239 | return 0; | |
2240 | } | |
2241 | ||
a3d2eaf0 | 2242 | static void print_rd_rules(const struct ieee80211_regdomain *rd) |
b2e1b302 LR |
2243 | { |
2244 | unsigned int i; | |
a3d2eaf0 JB |
2245 | const struct ieee80211_reg_rule *reg_rule = NULL; |
2246 | const struct ieee80211_freq_range *freq_range = NULL; | |
2247 | const struct ieee80211_power_rule *power_rule = NULL; | |
97524820 | 2248 | char bw[32]; |
b2e1b302 | 2249 | |
6653325a | 2250 | pr_info(" (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)\n"); |
b2e1b302 LR |
2251 | |
2252 | for (i = 0; i < rd->n_reg_rules; i++) { | |
2253 | reg_rule = &rd->reg_rules[i]; | |
2254 | freq_range = ®_rule->freq_range; | |
2255 | power_rule = ®_rule->power_rule; | |
2256 | ||
97524820 JD |
2257 | if (!freq_range->max_bandwidth_khz) |
2258 | snprintf(bw, 32, "%d KHz, AUTO", | |
2259 | reg_get_max_bandwidth(rd, reg_rule)); | |
2260 | else | |
2261 | snprintf(bw, 32, "%d KHz", | |
2262 | freq_range->max_bandwidth_khz); | |
2263 | ||
fb1fc7ad LR |
2264 | /* |
2265 | * There may not be documentation for max antenna gain | |
2266 | * in certain regions | |
2267 | */ | |
b2e1b302 | 2268 | if (power_rule->max_antenna_gain) |
97524820 | 2269 | pr_info(" (%d KHz - %d KHz @ %s), (%d mBi, %d mBm)\n", |
b2e1b302 LR |
2270 | freq_range->start_freq_khz, |
2271 | freq_range->end_freq_khz, | |
97524820 | 2272 | bw, |
b2e1b302 LR |
2273 | power_rule->max_antenna_gain, |
2274 | power_rule->max_eirp); | |
2275 | else | |
97524820 | 2276 | pr_info(" (%d KHz - %d KHz @ %s), (N/A, %d mBm)\n", |
b2e1b302 LR |
2277 | freq_range->start_freq_khz, |
2278 | freq_range->end_freq_khz, | |
97524820 | 2279 | bw, |
b2e1b302 LR |
2280 | power_rule->max_eirp); |
2281 | } | |
2282 | } | |
2283 | ||
4c7d3982 | 2284 | bool reg_supported_dfs_region(enum nl80211_dfs_regions dfs_region) |
8b60b078 LR |
2285 | { |
2286 | switch (dfs_region) { | |
2287 | case NL80211_DFS_UNSET: | |
2288 | case NL80211_DFS_FCC: | |
2289 | case NL80211_DFS_ETSI: | |
2290 | case NL80211_DFS_JP: | |
2291 | return true; | |
2292 | default: | |
2293 | REG_DBG_PRINT("Ignoring uknown DFS master region: %d\n", | |
2294 | dfs_region); | |
2295 | return false; | |
2296 | } | |
2297 | } | |
2298 | ||
a3d2eaf0 | 2299 | static void print_regdomain(const struct ieee80211_regdomain *rd) |
b2e1b302 | 2300 | { |
c492db37 | 2301 | struct regulatory_request *lr = get_last_request(); |
b2e1b302 | 2302 | |
3f2355cb | 2303 | if (is_intersected_alpha2(rd->alpha2)) { |
c492db37 | 2304 | if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) { |
79c97e97 | 2305 | struct cfg80211_registered_device *rdev; |
c492db37 | 2306 | rdev = cfg80211_rdev_by_wiphy_idx(lr->wiphy_idx); |
79c97e97 | 2307 | if (rdev) { |
e9c0268f | 2308 | pr_info("Current regulatory domain updated by AP to: %c%c\n", |
79c97e97 JB |
2309 | rdev->country_ie_alpha2[0], |
2310 | rdev->country_ie_alpha2[1]); | |
3f2355cb | 2311 | } else |
e9c0268f | 2312 | pr_info("Current regulatory domain intersected:\n"); |
3f2355cb | 2313 | } else |
e9c0268f | 2314 | pr_info("Current regulatory domain intersected:\n"); |
1a919318 | 2315 | } else if (is_world_regdom(rd->alpha2)) { |
e9c0268f | 2316 | pr_info("World regulatory domain updated:\n"); |
1a919318 | 2317 | } else { |
b2e1b302 | 2318 | if (is_unknown_alpha2(rd->alpha2)) |
e9c0268f | 2319 | pr_info("Regulatory domain changed to driver built-in settings (unknown country)\n"); |
57b5ce07 | 2320 | else { |
c492db37 | 2321 | if (reg_request_cell_base(lr)) |
1a919318 | 2322 | pr_info("Regulatory domain changed to country: %c%c by Cell Station\n", |
57b5ce07 LR |
2323 | rd->alpha2[0], rd->alpha2[1]); |
2324 | else | |
1a919318 | 2325 | pr_info("Regulatory domain changed to country: %c%c\n", |
57b5ce07 LR |
2326 | rd->alpha2[0], rd->alpha2[1]); |
2327 | } | |
b2e1b302 | 2328 | } |
1a919318 | 2329 | |
3ef121b5 | 2330 | pr_info(" DFS Master region: %s", reg_dfs_region_str(rd->dfs_region)); |
b2e1b302 LR |
2331 | print_rd_rules(rd); |
2332 | } | |
2333 | ||
2df78167 | 2334 | static void print_regdomain_info(const struct ieee80211_regdomain *rd) |
b2e1b302 | 2335 | { |
e9c0268f | 2336 | pr_info("Regulatory domain: %c%c\n", rd->alpha2[0], rd->alpha2[1]); |
b2e1b302 LR |
2337 | print_rd_rules(rd); |
2338 | } | |
2339 | ||
3b9e5aca LR |
2340 | static int reg_set_rd_core(const struct ieee80211_regdomain *rd) |
2341 | { | |
2342 | if (!is_world_regdom(rd->alpha2)) | |
2343 | return -EINVAL; | |
2344 | update_world_regdomain(rd); | |
2345 | return 0; | |
2346 | } | |
2347 | ||
84721d44 LR |
2348 | static int reg_set_rd_user(const struct ieee80211_regdomain *rd, |
2349 | struct regulatory_request *user_request) | |
2350 | { | |
2351 | const struct ieee80211_regdomain *intersected_rd = NULL; | |
2352 | ||
2353 | if (is_world_regdom(rd->alpha2)) | |
2354 | return -EINVAL; | |
2355 | ||
2356 | if (!regdom_changes(rd->alpha2)) | |
2357 | return -EALREADY; | |
2358 | ||
2359 | if (!is_valid_rd(rd)) { | |
2360 | pr_err("Invalid regulatory domain detected:\n"); | |
2361 | print_regdomain_info(rd); | |
2362 | return -EINVAL; | |
2363 | } | |
2364 | ||
2365 | if (!user_request->intersect) { | |
2366 | reset_regdomains(false, rd); | |
2367 | return 0; | |
2368 | } | |
2369 | ||
2370 | intersected_rd = regdom_intersect(rd, get_cfg80211_regdom()); | |
2371 | if (!intersected_rd) | |
2372 | return -EINVAL; | |
2373 | ||
2374 | kfree(rd); | |
2375 | rd = NULL; | |
2376 | reset_regdomains(false, intersected_rd); | |
2377 | ||
2378 | return 0; | |
2379 | } | |
2380 | ||
f5fe3247 LR |
2381 | static int reg_set_rd_driver(const struct ieee80211_regdomain *rd, |
2382 | struct regulatory_request *driver_request) | |
b2e1b302 | 2383 | { |
e9763c3c | 2384 | const struct ieee80211_regdomain *regd; |
9c96477d | 2385 | const struct ieee80211_regdomain *intersected_rd = NULL; |
f5fe3247 | 2386 | const struct ieee80211_regdomain *tmp; |
806a9e39 | 2387 | struct wiphy *request_wiphy; |
6913b49a | 2388 | |
f5fe3247 | 2389 | if (is_world_regdom(rd->alpha2)) |
b2e1b302 LR |
2390 | return -EINVAL; |
2391 | ||
f5fe3247 LR |
2392 | if (!regdom_changes(rd->alpha2)) |
2393 | return -EALREADY; | |
b2e1b302 | 2394 | |
8375af3b | 2395 | if (!is_valid_rd(rd)) { |
e9c0268f | 2396 | pr_err("Invalid regulatory domain detected:\n"); |
8375af3b LR |
2397 | print_regdomain_info(rd); |
2398 | return -EINVAL; | |
b2e1b302 LR |
2399 | } |
2400 | ||
f5fe3247 LR |
2401 | request_wiphy = wiphy_idx_to_wiphy(driver_request->wiphy_idx); |
2402 | if (!request_wiphy) { | |
845f3351 SD |
2403 | queue_delayed_work(system_power_efficient_wq, |
2404 | ®_timeout, 0); | |
de3584bd JB |
2405 | return -ENODEV; |
2406 | } | |
806a9e39 | 2407 | |
f5fe3247 | 2408 | if (!driver_request->intersect) { |
558f6d32 LR |
2409 | if (request_wiphy->regd) |
2410 | return -EALREADY; | |
3e0c3ff3 | 2411 | |
e9763c3c JB |
2412 | regd = reg_copy_regd(rd); |
2413 | if (IS_ERR(regd)) | |
2414 | return PTR_ERR(regd); | |
3e0c3ff3 | 2415 | |
458f4f9e | 2416 | rcu_assign_pointer(request_wiphy->regd, regd); |
379b82f4 | 2417 | reset_regdomains(false, rd); |
b8295acd LR |
2418 | return 0; |
2419 | } | |
2420 | ||
f5fe3247 LR |
2421 | intersected_rd = regdom_intersect(rd, get_cfg80211_regdom()); |
2422 | if (!intersected_rd) | |
2423 | return -EINVAL; | |
b8295acd | 2424 | |
f5fe3247 LR |
2425 | /* |
2426 | * We can trash what CRDA provided now. | |
2427 | * However if a driver requested this specific regulatory | |
2428 | * domain we keep it for its private use | |
2429 | */ | |
2430 | tmp = get_wiphy_regdom(request_wiphy); | |
2431 | rcu_assign_pointer(request_wiphy->regd, rd); | |
2432 | rcu_free_regdom(tmp); | |
b8295acd | 2433 | |
f5fe3247 | 2434 | rd = NULL; |
b7566fc3 | 2435 | |
f5fe3247 | 2436 | reset_regdomains(false, intersected_rd); |
3e0c3ff3 | 2437 | |
f5fe3247 LR |
2438 | return 0; |
2439 | } | |
2440 | ||
01992406 LR |
2441 | static int reg_set_rd_country_ie(const struct ieee80211_regdomain *rd, |
2442 | struct regulatory_request *country_ie_request) | |
f5fe3247 LR |
2443 | { |
2444 | struct wiphy *request_wiphy; | |
b8295acd | 2445 | |
f5fe3247 LR |
2446 | if (!is_alpha2_set(rd->alpha2) && !is_an_alpha2(rd->alpha2) && |
2447 | !is_unknown_alpha2(rd->alpha2)) | |
2448 | return -EINVAL; | |
b8295acd | 2449 | |
f5fe3247 LR |
2450 | /* |
2451 | * Lets only bother proceeding on the same alpha2 if the current | |
2452 | * rd is non static (it means CRDA was present and was used last) | |
2453 | * and the pending request came in from a country IE | |
2454 | */ | |
2455 | ||
2456 | if (!is_valid_rd(rd)) { | |
2457 | pr_err("Invalid regulatory domain detected:\n"); | |
2458 | print_regdomain_info(rd); | |
2459 | return -EINVAL; | |
9c96477d LR |
2460 | } |
2461 | ||
01992406 | 2462 | request_wiphy = wiphy_idx_to_wiphy(country_ie_request->wiphy_idx); |
f5fe3247 | 2463 | if (!request_wiphy) { |
845f3351 SD |
2464 | queue_delayed_work(system_power_efficient_wq, |
2465 | ®_timeout, 0); | |
f5fe3247 LR |
2466 | return -ENODEV; |
2467 | } | |
b2e1b302 | 2468 | |
01992406 | 2469 | if (country_ie_request->intersect) |
f5fe3247 LR |
2470 | return -EINVAL; |
2471 | ||
2472 | reset_regdomains(false, rd); | |
2473 | return 0; | |
2474 | } | |
b2e1b302 | 2475 | |
fb1fc7ad LR |
2476 | /* |
2477 | * Use this call to set the current regulatory domain. Conflicts with | |
b2e1b302 | 2478 | * multiple drivers can be ironed out later. Caller must've already |
458f4f9e | 2479 | * kmalloc'd the rd structure. |
fb1fc7ad | 2480 | */ |
a3d2eaf0 | 2481 | int set_regdom(const struct ieee80211_regdomain *rd) |
b2e1b302 | 2482 | { |
c492db37 | 2483 | struct regulatory_request *lr; |
b2e1b302 LR |
2484 | int r; |
2485 | ||
3b9e5aca LR |
2486 | if (!reg_is_valid_request(rd->alpha2)) { |
2487 | kfree(rd); | |
2488 | return -EINVAL; | |
2489 | } | |
2490 | ||
c492db37 | 2491 | lr = get_last_request(); |
abc7381b | 2492 | |
b2e1b302 | 2493 | /* Note that this doesn't update the wiphys, this is done below */ |
3b9e5aca LR |
2494 | switch (lr->initiator) { |
2495 | case NL80211_REGDOM_SET_BY_CORE: | |
2496 | r = reg_set_rd_core(rd); | |
2497 | break; | |
2498 | case NL80211_REGDOM_SET_BY_USER: | |
84721d44 LR |
2499 | r = reg_set_rd_user(rd, lr); |
2500 | break; | |
3b9e5aca | 2501 | case NL80211_REGDOM_SET_BY_DRIVER: |
f5fe3247 LR |
2502 | r = reg_set_rd_driver(rd, lr); |
2503 | break; | |
3b9e5aca | 2504 | case NL80211_REGDOM_SET_BY_COUNTRY_IE: |
01992406 | 2505 | r = reg_set_rd_country_ie(rd, lr); |
3b9e5aca LR |
2506 | break; |
2507 | default: | |
2508 | WARN(1, "invalid initiator %d\n", lr->initiator); | |
2509 | return -EINVAL; | |
2510 | } | |
2511 | ||
d2372b31 | 2512 | if (r) { |
95908535 KV |
2513 | if (r == -EALREADY) |
2514 | reg_set_request_processed(); | |
2515 | ||
d2372b31 | 2516 | kfree(rd); |
38fd2143 | 2517 | return r; |
d2372b31 | 2518 | } |
b2e1b302 | 2519 | |
b2e1b302 | 2520 | /* This would make this whole thing pointless */ |
38fd2143 JB |
2521 | if (WARN_ON(!lr->intersect && rd != get_cfg80211_regdom())) |
2522 | return -EINVAL; | |
b2e1b302 LR |
2523 | |
2524 | /* update all wiphys now with the new established regulatory domain */ | |
c492db37 | 2525 | update_all_wiphy_regulatory(lr->initiator); |
b2e1b302 | 2526 | |
458f4f9e | 2527 | print_regdomain(get_cfg80211_regdom()); |
b2e1b302 | 2528 | |
c492db37 | 2529 | nl80211_send_reg_change_event(lr); |
73d54c9e | 2530 | |
b2e253cf LR |
2531 | reg_set_request_processed(); |
2532 | ||
38fd2143 | 2533 | return 0; |
b2e1b302 LR |
2534 | } |
2535 | ||
4d9d88d1 SJR |
2536 | int reg_device_uevent(struct device *dev, struct kobj_uevent_env *env) |
2537 | { | |
4a484cff JB |
2538 | struct regulatory_request *lr; |
2539 | u8 alpha2[2]; | |
2540 | bool add = false; | |
c492db37 | 2541 | |
4a484cff JB |
2542 | rcu_read_lock(); |
2543 | lr = get_last_request(); | |
c492db37 | 2544 | if (lr && !lr->processed) { |
4a484cff JB |
2545 | memcpy(alpha2, lr->alpha2, 2); |
2546 | add = true; | |
4d9d88d1 | 2547 | } |
4a484cff | 2548 | rcu_read_unlock(); |
4d9d88d1 | 2549 | |
4a484cff JB |
2550 | if (add) |
2551 | return add_uevent_var(env, "COUNTRY=%c%c", | |
2552 | alpha2[0], alpha2[1]); | |
4d9d88d1 SJR |
2553 | return 0; |
2554 | } | |
4d9d88d1 | 2555 | |
57b5ce07 LR |
2556 | void wiphy_regulatory_register(struct wiphy *wiphy) |
2557 | { | |
23df0b73 AN |
2558 | struct regulatory_request *lr; |
2559 | ||
57b5ce07 LR |
2560 | if (!reg_dev_ignore_cell_hint(wiphy)) |
2561 | reg_num_devs_support_basehint++; | |
2562 | ||
23df0b73 AN |
2563 | lr = get_last_request(); |
2564 | wiphy_update_regulatory(wiphy, lr->initiator); | |
57b5ce07 LR |
2565 | } |
2566 | ||
bfead080 | 2567 | void wiphy_regulatory_deregister(struct wiphy *wiphy) |
3f2355cb | 2568 | { |
0ad8acaf | 2569 | struct wiphy *request_wiphy = NULL; |
c492db37 | 2570 | struct regulatory_request *lr; |
761cf7ec | 2571 | |
c492db37 | 2572 | lr = get_last_request(); |
abc7381b | 2573 | |
57b5ce07 LR |
2574 | if (!reg_dev_ignore_cell_hint(wiphy)) |
2575 | reg_num_devs_support_basehint--; | |
2576 | ||
458f4f9e JB |
2577 | rcu_free_regdom(get_wiphy_regdom(wiphy)); |
2578 | rcu_assign_pointer(wiphy->regd, NULL); | |
0ef9ccdd | 2579 | |
c492db37 JB |
2580 | if (lr) |
2581 | request_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx); | |
806a9e39 | 2582 | |
0ef9ccdd | 2583 | if (!request_wiphy || request_wiphy != wiphy) |
38fd2143 | 2584 | return; |
0ef9ccdd | 2585 | |
c492db37 JB |
2586 | lr->wiphy_idx = WIPHY_IDX_INVALID; |
2587 | lr->country_ie_env = ENVIRON_ANY; | |
3f2355cb LR |
2588 | } |
2589 | ||
a90c7a31 LR |
2590 | static void reg_timeout_work(struct work_struct *work) |
2591 | { | |
1a919318 | 2592 | REG_DBG_PRINT("Timeout while waiting for CRDA to reply, restoring regulatory settings\n"); |
f77b86d7 | 2593 | rtnl_lock(); |
a90c7a31 | 2594 | restore_regulatory_settings(true); |
f77b86d7 | 2595 | rtnl_unlock(); |
a90c7a31 LR |
2596 | } |
2597 | ||
2fcc9f73 | 2598 | int __init regulatory_init(void) |
b2e1b302 | 2599 | { |
bcf4f99b | 2600 | int err = 0; |
734366de | 2601 | |
b2e1b302 LR |
2602 | reg_pdev = platform_device_register_simple("regulatory", 0, NULL, 0); |
2603 | if (IS_ERR(reg_pdev)) | |
2604 | return PTR_ERR(reg_pdev); | |
734366de | 2605 | |
4d9d88d1 SJR |
2606 | reg_pdev->dev.type = ®_device_type; |
2607 | ||
fe33eb39 | 2608 | spin_lock_init(®_requests_lock); |
e38f8a7a | 2609 | spin_lock_init(®_pending_beacons_lock); |
fe33eb39 | 2610 | |
80007efe LR |
2611 | reg_regdb_size_check(); |
2612 | ||
458f4f9e | 2613 | rcu_assign_pointer(cfg80211_regdomain, cfg80211_world_regdom); |
734366de | 2614 | |
09d989d1 LR |
2615 | user_alpha2[0] = '9'; |
2616 | user_alpha2[1] = '7'; | |
2617 | ||
ae9e4b0d | 2618 | /* We always try to get an update for the static regdomain */ |
458f4f9e | 2619 | err = regulatory_hint_core(cfg80211_world_regdom->alpha2); |
ba25c141 | 2620 | if (err) { |
bcf4f99b LR |
2621 | if (err == -ENOMEM) |
2622 | return err; | |
2623 | /* | |
2624 | * N.B. kobject_uevent_env() can fail mainly for when we're out | |
2625 | * memory which is handled and propagated appropriately above | |
2626 | * but it can also fail during a netlink_broadcast() or during | |
2627 | * early boot for call_usermodehelper(). For now treat these | |
2628 | * errors as non-fatal. | |
2629 | */ | |
e9c0268f | 2630 | pr_err("kobject_uevent_env() was unable to call CRDA during init\n"); |
bcf4f99b | 2631 | } |
734366de | 2632 | |
ae9e4b0d LR |
2633 | /* |
2634 | * Finally, if the user set the module parameter treat it | |
2635 | * as a user hint. | |
2636 | */ | |
2637 | if (!is_world_regdom(ieee80211_regdom)) | |
57b5ce07 LR |
2638 | regulatory_hint_user(ieee80211_regdom, |
2639 | NL80211_USER_REG_HINT_USER); | |
ae9e4b0d | 2640 | |
b2e1b302 LR |
2641 | return 0; |
2642 | } | |
2643 | ||
1a919318 | 2644 | void regulatory_exit(void) |
b2e1b302 | 2645 | { |
fe33eb39 | 2646 | struct regulatory_request *reg_request, *tmp; |
e38f8a7a | 2647 | struct reg_beacon *reg_beacon, *btmp; |
fe33eb39 LR |
2648 | |
2649 | cancel_work_sync(®_work); | |
a90c7a31 | 2650 | cancel_delayed_work_sync(®_timeout); |
fe33eb39 | 2651 | |
9027b149 | 2652 | /* Lock to suppress warnings */ |
38fd2143 | 2653 | rtnl_lock(); |
379b82f4 | 2654 | reset_regdomains(true, NULL); |
38fd2143 | 2655 | rtnl_unlock(); |
734366de | 2656 | |
58ebacc6 | 2657 | dev_set_uevent_suppress(®_pdev->dev, true); |
f6037d09 | 2658 | |
b2e1b302 | 2659 | platform_device_unregister(reg_pdev); |
734366de | 2660 | |
fea9bced JB |
2661 | list_for_each_entry_safe(reg_beacon, btmp, ®_pending_beacons, list) { |
2662 | list_del(®_beacon->list); | |
2663 | kfree(reg_beacon); | |
e38f8a7a | 2664 | } |
e38f8a7a | 2665 | |
fea9bced JB |
2666 | list_for_each_entry_safe(reg_beacon, btmp, ®_beacon_list, list) { |
2667 | list_del(®_beacon->list); | |
2668 | kfree(reg_beacon); | |
e38f8a7a LR |
2669 | } |
2670 | ||
fea9bced JB |
2671 | list_for_each_entry_safe(reg_request, tmp, ®_requests_list, list) { |
2672 | list_del(®_request->list); | |
2673 | kfree(reg_request); | |
fe33eb39 | 2674 | } |
8318d78a | 2675 | } |