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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 | |
fb1fc7ad LR |
94 | /* |
95 | * Central wireless core regulatory domains, we only need two, | |
734366de | 96 | * the current one and a world regulatory domain in case we have no |
e8da2bb4 | 97 | * information to give us an alpha2. |
38fd2143 | 98 | * (protected by RTNL, can be read under RCU) |
fb1fc7ad | 99 | */ |
458f4f9e | 100 | const struct ieee80211_regdomain __rcu *cfg80211_regdomain; |
734366de | 101 | |
57b5ce07 LR |
102 | /* |
103 | * Number of devices that registered to the core | |
104 | * that support cellular base station regulatory hints | |
38fd2143 | 105 | * (protected by RTNL) |
57b5ce07 LR |
106 | */ |
107 | static int reg_num_devs_support_basehint; | |
108 | ||
458f4f9e JB |
109 | static const struct ieee80211_regdomain *get_cfg80211_regdom(void) |
110 | { | |
38fd2143 | 111 | return rtnl_dereference(cfg80211_regdomain); |
458f4f9e JB |
112 | } |
113 | ||
114 | static const struct ieee80211_regdomain *get_wiphy_regdom(struct wiphy *wiphy) | |
115 | { | |
38fd2143 | 116 | return rtnl_dereference(wiphy->regd); |
458f4f9e JB |
117 | } |
118 | ||
3ef121b5 LR |
119 | static const char *reg_dfs_region_str(enum nl80211_dfs_regions dfs_region) |
120 | { | |
121 | switch (dfs_region) { | |
122 | case NL80211_DFS_UNSET: | |
123 | return "unset"; | |
124 | case NL80211_DFS_FCC: | |
125 | return "FCC"; | |
126 | case NL80211_DFS_ETSI: | |
127 | return "ETSI"; | |
128 | case NL80211_DFS_JP: | |
129 | return "JP"; | |
130 | } | |
131 | return "Unknown"; | |
132 | } | |
133 | ||
6c474799 LR |
134 | enum nl80211_dfs_regions reg_get_dfs_region(struct wiphy *wiphy) |
135 | { | |
136 | const struct ieee80211_regdomain *regd = NULL; | |
137 | const struct ieee80211_regdomain *wiphy_regd = NULL; | |
138 | ||
139 | regd = get_cfg80211_regdom(); | |
140 | if (!wiphy) | |
141 | goto out; | |
142 | ||
143 | wiphy_regd = get_wiphy_regdom(wiphy); | |
144 | if (!wiphy_regd) | |
145 | goto out; | |
146 | ||
147 | if (wiphy_regd->dfs_region == regd->dfs_region) | |
148 | goto out; | |
149 | ||
150 | REG_DBG_PRINT("%s: device specific dfs_region " | |
151 | "(%s) disagrees with cfg80211's " | |
152 | "central dfs_region (%s)\n", | |
153 | dev_name(&wiphy->dev), | |
154 | reg_dfs_region_str(wiphy_regd->dfs_region), | |
155 | reg_dfs_region_str(regd->dfs_region)); | |
156 | ||
157 | out: | |
158 | return regd->dfs_region; | |
159 | } | |
160 | ||
458f4f9e JB |
161 | static void rcu_free_regdom(const struct ieee80211_regdomain *r) |
162 | { | |
163 | if (!r) | |
164 | return; | |
165 | kfree_rcu((struct ieee80211_regdomain *)r, rcu_head); | |
166 | } | |
167 | ||
c492db37 JB |
168 | static struct regulatory_request *get_last_request(void) |
169 | { | |
38fd2143 | 170 | return rcu_dereference_rtnl(last_request); |
c492db37 JB |
171 | } |
172 | ||
e38f8a7a | 173 | /* Used to queue up regulatory hints */ |
fe33eb39 LR |
174 | static LIST_HEAD(reg_requests_list); |
175 | static spinlock_t reg_requests_lock; | |
176 | ||
e38f8a7a LR |
177 | /* Used to queue up beacon hints for review */ |
178 | static LIST_HEAD(reg_pending_beacons); | |
179 | static spinlock_t reg_pending_beacons_lock; | |
180 | ||
181 | /* Used to keep track of processed beacon hints */ | |
182 | static LIST_HEAD(reg_beacon_list); | |
183 | ||
184 | struct reg_beacon { | |
185 | struct list_head list; | |
186 | struct ieee80211_channel chan; | |
187 | }; | |
188 | ||
f333a7a2 LR |
189 | static void reg_todo(struct work_struct *work); |
190 | static DECLARE_WORK(reg_work, reg_todo); | |
191 | ||
a90c7a31 LR |
192 | static void reg_timeout_work(struct work_struct *work); |
193 | static DECLARE_DELAYED_WORK(reg_timeout, reg_timeout_work); | |
194 | ||
734366de JB |
195 | /* We keep a static world regulatory domain in case of the absence of CRDA */ |
196 | static const struct ieee80211_regdomain world_regdom = { | |
90cdc6df | 197 | .n_reg_rules = 6, |
734366de JB |
198 | .alpha2 = "00", |
199 | .reg_rules = { | |
68798a62 LR |
200 | /* IEEE 802.11b/g, channels 1..11 */ |
201 | REG_RULE(2412-10, 2462+10, 40, 6, 20, 0), | |
43c771a1 JB |
202 | /* IEEE 802.11b/g, channels 12..13. */ |
203 | REG_RULE(2467-10, 2472+10, 40, 6, 20, | |
8fe02e16 | 204 | NL80211_RRF_NO_IR), |
611b6a82 LR |
205 | /* IEEE 802.11 channel 14 - Only JP enables |
206 | * this and for 802.11b only */ | |
207 | REG_RULE(2484-10, 2484+10, 20, 6, 20, | |
8fe02e16 | 208 | NL80211_RRF_NO_IR | |
611b6a82 LR |
209 | NL80211_RRF_NO_OFDM), |
210 | /* IEEE 802.11a, channel 36..48 */ | |
131a19bc | 211 | REG_RULE(5180-10, 5240+10, 160, 6, 20, |
8fe02e16 | 212 | NL80211_RRF_NO_IR), |
3fc71f77 | 213 | |
131a19bc JB |
214 | /* IEEE 802.11a, channel 52..64 - DFS required */ |
215 | REG_RULE(5260-10, 5320+10, 160, 6, 20, | |
8fe02e16 | 216 | NL80211_RRF_NO_IR | |
131a19bc JB |
217 | NL80211_RRF_DFS), |
218 | ||
219 | /* IEEE 802.11a, channel 100..144 - DFS required */ | |
220 | REG_RULE(5500-10, 5720+10, 160, 6, 20, | |
8fe02e16 | 221 | NL80211_RRF_NO_IR | |
131a19bc | 222 | NL80211_RRF_DFS), |
3fc71f77 LR |
223 | |
224 | /* IEEE 802.11a, channel 149..165 */ | |
8ab9d85c | 225 | REG_RULE(5745-10, 5825+10, 80, 6, 20, |
8fe02e16 | 226 | NL80211_RRF_NO_IR), |
90cdc6df VK |
227 | |
228 | /* IEEE 802.11ad (60gHz), channels 1..3 */ | |
229 | REG_RULE(56160+2160*1-1080, 56160+2160*3+1080, 2160, 0, 0, 0), | |
734366de JB |
230 | } |
231 | }; | |
232 | ||
38fd2143 | 233 | /* protected by RTNL */ |
a3d2eaf0 JB |
234 | static const struct ieee80211_regdomain *cfg80211_world_regdom = |
235 | &world_regdom; | |
734366de | 236 | |
6ee7d330 | 237 | static char *ieee80211_regdom = "00"; |
09d989d1 | 238 | static char user_alpha2[2]; |
6ee7d330 | 239 | |
734366de JB |
240 | module_param(ieee80211_regdom, charp, 0444); |
241 | MODULE_PARM_DESC(ieee80211_regdom, "IEEE 802.11 regulatory domain code"); | |
242 | ||
255e25b0 | 243 | static void reg_free_request(struct regulatory_request *lr) |
5ad6ef5e | 244 | { |
5ad6ef5e LR |
245 | if (lr != &core_request_world && lr) |
246 | kfree_rcu(lr, rcu_head); | |
247 | } | |
248 | ||
05f1a3ea LR |
249 | static void reg_update_last_request(struct regulatory_request *request) |
250 | { | |
255e25b0 LR |
251 | struct regulatory_request *lr; |
252 | ||
253 | lr = get_last_request(); | |
254 | if (lr == request) | |
255 | return; | |
256 | ||
257 | reg_free_request(lr); | |
05f1a3ea LR |
258 | rcu_assign_pointer(last_request, request); |
259 | } | |
260 | ||
379b82f4 JB |
261 | static void reset_regdomains(bool full_reset, |
262 | const struct ieee80211_regdomain *new_regdom) | |
734366de | 263 | { |
458f4f9e JB |
264 | const struct ieee80211_regdomain *r; |
265 | ||
38fd2143 | 266 | ASSERT_RTNL(); |
e8da2bb4 | 267 | |
458f4f9e JB |
268 | r = get_cfg80211_regdom(); |
269 | ||
942b25cf | 270 | /* avoid freeing static information or freeing something twice */ |
458f4f9e JB |
271 | if (r == cfg80211_world_regdom) |
272 | r = NULL; | |
942b25cf JB |
273 | if (cfg80211_world_regdom == &world_regdom) |
274 | cfg80211_world_regdom = NULL; | |
458f4f9e JB |
275 | if (r == &world_regdom) |
276 | r = NULL; | |
942b25cf | 277 | |
458f4f9e JB |
278 | rcu_free_regdom(r); |
279 | rcu_free_regdom(cfg80211_world_regdom); | |
734366de | 280 | |
a3d2eaf0 | 281 | cfg80211_world_regdom = &world_regdom; |
458f4f9e | 282 | rcu_assign_pointer(cfg80211_regdomain, new_regdom); |
a042994d LR |
283 | |
284 | if (!full_reset) | |
285 | return; | |
286 | ||
05f1a3ea | 287 | reg_update_last_request(&core_request_world); |
734366de JB |
288 | } |
289 | ||
fb1fc7ad LR |
290 | /* |
291 | * Dynamic world regulatory domain requested by the wireless | |
292 | * core upon initialization | |
293 | */ | |
a3d2eaf0 | 294 | static void update_world_regdomain(const struct ieee80211_regdomain *rd) |
734366de | 295 | { |
c492db37 | 296 | struct regulatory_request *lr; |
734366de | 297 | |
c492db37 JB |
298 | lr = get_last_request(); |
299 | ||
300 | WARN_ON(!lr); | |
734366de | 301 | |
379b82f4 | 302 | reset_regdomains(false, rd); |
734366de JB |
303 | |
304 | cfg80211_world_regdom = rd; | |
734366de | 305 | } |
734366de | 306 | |
a3d2eaf0 | 307 | bool is_world_regdom(const char *alpha2) |
b2e1b302 LR |
308 | { |
309 | if (!alpha2) | |
310 | return false; | |
1a919318 | 311 | return alpha2[0] == '0' && alpha2[1] == '0'; |
b2e1b302 | 312 | } |
8318d78a | 313 | |
a3d2eaf0 | 314 | static bool is_alpha2_set(const char *alpha2) |
b2e1b302 LR |
315 | { |
316 | if (!alpha2) | |
317 | return false; | |
1a919318 | 318 | return alpha2[0] && alpha2[1]; |
b2e1b302 | 319 | } |
8318d78a | 320 | |
a3d2eaf0 | 321 | static bool is_unknown_alpha2(const char *alpha2) |
b2e1b302 LR |
322 | { |
323 | if (!alpha2) | |
324 | return false; | |
fb1fc7ad LR |
325 | /* |
326 | * Special case where regulatory domain was built by driver | |
327 | * but a specific alpha2 cannot be determined | |
328 | */ | |
1a919318 | 329 | return alpha2[0] == '9' && alpha2[1] == '9'; |
b2e1b302 | 330 | } |
8318d78a | 331 | |
3f2355cb LR |
332 | static bool is_intersected_alpha2(const char *alpha2) |
333 | { | |
334 | if (!alpha2) | |
335 | return false; | |
fb1fc7ad LR |
336 | /* |
337 | * Special case where regulatory domain is the | |
3f2355cb | 338 | * result of an intersection between two regulatory domain |
fb1fc7ad LR |
339 | * structures |
340 | */ | |
1a919318 | 341 | return alpha2[0] == '9' && alpha2[1] == '8'; |
3f2355cb LR |
342 | } |
343 | ||
a3d2eaf0 | 344 | static bool is_an_alpha2(const char *alpha2) |
b2e1b302 LR |
345 | { |
346 | if (!alpha2) | |
347 | return false; | |
1a919318 | 348 | return isalpha(alpha2[0]) && isalpha(alpha2[1]); |
b2e1b302 | 349 | } |
8318d78a | 350 | |
a3d2eaf0 | 351 | static bool alpha2_equal(const char *alpha2_x, const char *alpha2_y) |
b2e1b302 LR |
352 | { |
353 | if (!alpha2_x || !alpha2_y) | |
354 | return false; | |
1a919318 | 355 | return alpha2_x[0] == alpha2_y[0] && alpha2_x[1] == alpha2_y[1]; |
b2e1b302 LR |
356 | } |
357 | ||
69b1572b | 358 | static bool regdom_changes(const char *alpha2) |
b2e1b302 | 359 | { |
458f4f9e | 360 | const struct ieee80211_regdomain *r = get_cfg80211_regdom(); |
761cf7ec | 361 | |
458f4f9e | 362 | if (!r) |
b2e1b302 | 363 | return true; |
458f4f9e | 364 | return !alpha2_equal(r->alpha2, alpha2); |
b2e1b302 LR |
365 | } |
366 | ||
09d989d1 LR |
367 | /* |
368 | * The NL80211_REGDOM_SET_BY_USER regdom alpha2 is cached, this lets | |
369 | * you know if a valid regulatory hint with NL80211_REGDOM_SET_BY_USER | |
370 | * has ever been issued. | |
371 | */ | |
372 | static bool is_user_regdom_saved(void) | |
373 | { | |
374 | if (user_alpha2[0] == '9' && user_alpha2[1] == '7') | |
375 | return false; | |
376 | ||
377 | /* This would indicate a mistake on the design */ | |
1a919318 | 378 | if (WARN(!is_world_regdom(user_alpha2) && !is_an_alpha2(user_alpha2), |
09d989d1 | 379 | "Unexpected user alpha2: %c%c\n", |
1a919318 | 380 | user_alpha2[0], user_alpha2[1])) |
09d989d1 LR |
381 | return false; |
382 | ||
383 | return true; | |
384 | } | |
385 | ||
e9763c3c JB |
386 | static const struct ieee80211_regdomain * |
387 | reg_copy_regd(const struct ieee80211_regdomain *src_regd) | |
3b377ea9 JL |
388 | { |
389 | struct ieee80211_regdomain *regd; | |
e9763c3c | 390 | int size_of_regd; |
3b377ea9 JL |
391 | unsigned int i; |
392 | ||
82f20856 JB |
393 | size_of_regd = |
394 | sizeof(struct ieee80211_regdomain) + | |
395 | src_regd->n_reg_rules * sizeof(struct ieee80211_reg_rule); | |
3b377ea9 JL |
396 | |
397 | regd = kzalloc(size_of_regd, GFP_KERNEL); | |
398 | if (!regd) | |
e9763c3c | 399 | return ERR_PTR(-ENOMEM); |
3b377ea9 JL |
400 | |
401 | memcpy(regd, src_regd, sizeof(struct ieee80211_regdomain)); | |
402 | ||
403 | for (i = 0; i < src_regd->n_reg_rules; i++) | |
404 | memcpy(®d->reg_rules[i], &src_regd->reg_rules[i], | |
e9763c3c | 405 | sizeof(struct ieee80211_reg_rule)); |
3b377ea9 | 406 | |
e9763c3c | 407 | return regd; |
3b377ea9 JL |
408 | } |
409 | ||
410 | #ifdef CONFIG_CFG80211_INTERNAL_REGDB | |
411 | struct reg_regdb_search_request { | |
412 | char alpha2[2]; | |
413 | struct list_head list; | |
414 | }; | |
415 | ||
416 | static LIST_HEAD(reg_regdb_search_list); | |
368d06f5 | 417 | static DEFINE_MUTEX(reg_regdb_search_mutex); |
3b377ea9 JL |
418 | |
419 | static void reg_regdb_search(struct work_struct *work) | |
420 | { | |
421 | struct reg_regdb_search_request *request; | |
e9763c3c JB |
422 | const struct ieee80211_regdomain *curdom, *regdom = NULL; |
423 | int i; | |
a85d0d7f | 424 | |
5fe231e8 | 425 | rtnl_lock(); |
3b377ea9 | 426 | |
368d06f5 | 427 | mutex_lock(®_regdb_search_mutex); |
3b377ea9 JL |
428 | while (!list_empty(®_regdb_search_list)) { |
429 | request = list_first_entry(®_regdb_search_list, | |
430 | struct reg_regdb_search_request, | |
431 | list); | |
432 | list_del(&request->list); | |
433 | ||
1a919318 | 434 | for (i = 0; i < reg_regdb_size; i++) { |
3b377ea9 JL |
435 | curdom = reg_regdb[i]; |
436 | ||
1a919318 | 437 | if (alpha2_equal(request->alpha2, curdom->alpha2)) { |
e9763c3c | 438 | regdom = reg_copy_regd(curdom); |
3b377ea9 JL |
439 | break; |
440 | } | |
441 | } | |
442 | ||
443 | kfree(request); | |
444 | } | |
368d06f5 | 445 | mutex_unlock(®_regdb_search_mutex); |
a85d0d7f | 446 | |
e9763c3c | 447 | if (!IS_ERR_OR_NULL(regdom)) |
a85d0d7f LR |
448 | set_regdom(regdom); |
449 | ||
5fe231e8 | 450 | rtnl_unlock(); |
3b377ea9 JL |
451 | } |
452 | ||
453 | static DECLARE_WORK(reg_regdb_work, reg_regdb_search); | |
454 | ||
455 | static void reg_regdb_query(const char *alpha2) | |
456 | { | |
457 | struct reg_regdb_search_request *request; | |
458 | ||
459 | if (!alpha2) | |
460 | return; | |
461 | ||
462 | request = kzalloc(sizeof(struct reg_regdb_search_request), GFP_KERNEL); | |
463 | if (!request) | |
464 | return; | |
465 | ||
466 | memcpy(request->alpha2, alpha2, 2); | |
467 | ||
368d06f5 | 468 | mutex_lock(®_regdb_search_mutex); |
3b377ea9 | 469 | list_add_tail(&request->list, ®_regdb_search_list); |
368d06f5 | 470 | mutex_unlock(®_regdb_search_mutex); |
3b377ea9 JL |
471 | |
472 | schedule_work(®_regdb_work); | |
473 | } | |
80007efe LR |
474 | |
475 | /* Feel free to add any other sanity checks here */ | |
476 | static void reg_regdb_size_check(void) | |
477 | { | |
478 | /* We should ideally BUILD_BUG_ON() but then random builds would fail */ | |
479 | WARN_ONCE(!reg_regdb_size, "db.txt is empty, you should update it..."); | |
480 | } | |
3b377ea9 | 481 | #else |
80007efe | 482 | static inline void reg_regdb_size_check(void) {} |
3b377ea9 JL |
483 | static inline void reg_regdb_query(const char *alpha2) {} |
484 | #endif /* CONFIG_CFG80211_INTERNAL_REGDB */ | |
485 | ||
fb1fc7ad LR |
486 | /* |
487 | * This lets us keep regulatory code which is updated on a regulatory | |
1226d258 | 488 | * basis in userspace. |
fb1fc7ad | 489 | */ |
b2e1b302 LR |
490 | static int call_crda(const char *alpha2) |
491 | { | |
1226d258 JB |
492 | char country[12]; |
493 | char *env[] = { country, NULL }; | |
494 | ||
495 | snprintf(country, sizeof(country), "COUNTRY=%c%c", | |
496 | alpha2[0], alpha2[1]); | |
497 | ||
b2e1b302 | 498 | if (!is_world_regdom((char *) alpha2)) |
e9c0268f | 499 | pr_info("Calling CRDA for country: %c%c\n", |
b2e1b302 LR |
500 | alpha2[0], alpha2[1]); |
501 | else | |
e9c0268f | 502 | pr_info("Calling CRDA to update world regulatory domain\n"); |
b2e1b302 | 503 | |
3b377ea9 JL |
504 | /* query internal regulatory database (if it exists) */ |
505 | reg_regdb_query(alpha2); | |
506 | ||
1226d258 | 507 | return kobject_uevent_env(®_pdev->dev.kobj, KOBJ_CHANGE, env); |
b2e1b302 LR |
508 | } |
509 | ||
fe6631ff LR |
510 | static enum reg_request_treatment |
511 | reg_call_crda(struct regulatory_request *request) | |
512 | { | |
513 | if (call_crda(request->alpha2)) | |
514 | return REG_REQ_IGNORE; | |
515 | return REG_REQ_OK; | |
516 | } | |
517 | ||
e438768f | 518 | bool reg_is_valid_request(const char *alpha2) |
b2e1b302 | 519 | { |
c492db37 | 520 | struct regulatory_request *lr = get_last_request(); |
61405e97 | 521 | |
c492db37 | 522 | if (!lr || lr->processed) |
f6037d09 JB |
523 | return false; |
524 | ||
c492db37 | 525 | return alpha2_equal(lr->alpha2, alpha2); |
b2e1b302 | 526 | } |
8318d78a | 527 | |
e3961af1 JD |
528 | static const struct ieee80211_regdomain *reg_get_regdomain(struct wiphy *wiphy) |
529 | { | |
530 | struct regulatory_request *lr = get_last_request(); | |
531 | ||
532 | /* | |
533 | * Follow the driver's regulatory domain, if present, unless a country | |
534 | * IE has been processed or a user wants to help complaince further | |
535 | */ | |
536 | if (lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && | |
537 | lr->initiator != NL80211_REGDOM_SET_BY_USER && | |
538 | wiphy->regd) | |
539 | return get_wiphy_regdom(wiphy); | |
540 | ||
541 | return get_cfg80211_regdom(); | |
542 | } | |
543 | ||
97524820 JD |
544 | unsigned int reg_get_max_bandwidth(const struct ieee80211_regdomain *rd, |
545 | const struct ieee80211_reg_rule *rule) | |
546 | { | |
547 | const struct ieee80211_freq_range *freq_range = &rule->freq_range; | |
548 | const struct ieee80211_freq_range *freq_range_tmp; | |
549 | const struct ieee80211_reg_rule *tmp; | |
550 | u32 start_freq, end_freq, idx, no; | |
551 | ||
552 | for (idx = 0; idx < rd->n_reg_rules; idx++) | |
553 | if (rule == &rd->reg_rules[idx]) | |
554 | break; | |
555 | ||
556 | if (idx == rd->n_reg_rules) | |
557 | return 0; | |
558 | ||
559 | /* get start_freq */ | |
560 | no = idx; | |
561 | ||
562 | while (no) { | |
563 | tmp = &rd->reg_rules[--no]; | |
564 | freq_range_tmp = &tmp->freq_range; | |
565 | ||
566 | if (freq_range_tmp->end_freq_khz < freq_range->start_freq_khz) | |
567 | break; | |
568 | ||
97524820 JD |
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 | ||
97524820 JD |
585 | freq_range = freq_range_tmp; |
586 | } | |
587 | ||
588 | end_freq = freq_range->end_freq_khz; | |
589 | ||
590 | return end_freq - start_freq; | |
591 | } | |
592 | ||
b2e1b302 | 593 | /* Sanity check on a regulatory rule */ |
a3d2eaf0 | 594 | static bool is_valid_reg_rule(const struct ieee80211_reg_rule *rule) |
8318d78a | 595 | { |
a3d2eaf0 | 596 | const struct ieee80211_freq_range *freq_range = &rule->freq_range; |
b2e1b302 LR |
597 | u32 freq_diff; |
598 | ||
91e99004 | 599 | if (freq_range->start_freq_khz <= 0 || freq_range->end_freq_khz <= 0) |
b2e1b302 LR |
600 | return false; |
601 | ||
602 | if (freq_range->start_freq_khz > freq_range->end_freq_khz) | |
603 | return false; | |
604 | ||
605 | freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz; | |
606 | ||
bd05f28e | 607 | if (freq_range->end_freq_khz <= freq_range->start_freq_khz || |
1a919318 | 608 | freq_range->max_bandwidth_khz > freq_diff) |
b2e1b302 LR |
609 | return false; |
610 | ||
611 | return true; | |
612 | } | |
613 | ||
a3d2eaf0 | 614 | static bool is_valid_rd(const struct ieee80211_regdomain *rd) |
b2e1b302 | 615 | { |
a3d2eaf0 | 616 | const struct ieee80211_reg_rule *reg_rule = NULL; |
b2e1b302 | 617 | unsigned int i; |
8318d78a | 618 | |
b2e1b302 LR |
619 | if (!rd->n_reg_rules) |
620 | return false; | |
8318d78a | 621 | |
88dc1c3f LR |
622 | if (WARN_ON(rd->n_reg_rules > NL80211_MAX_SUPP_REG_RULES)) |
623 | return false; | |
624 | ||
b2e1b302 LR |
625 | for (i = 0; i < rd->n_reg_rules; i++) { |
626 | reg_rule = &rd->reg_rules[i]; | |
627 | if (!is_valid_reg_rule(reg_rule)) | |
628 | return false; | |
629 | } | |
630 | ||
631 | return true; | |
8318d78a JB |
632 | } |
633 | ||
038659e7 | 634 | static bool reg_does_bw_fit(const struct ieee80211_freq_range *freq_range, |
fe7ef5e9 | 635 | u32 center_freq_khz, u32 bw_khz) |
b2e1b302 | 636 | { |
038659e7 LR |
637 | u32 start_freq_khz, end_freq_khz; |
638 | ||
639 | start_freq_khz = center_freq_khz - (bw_khz/2); | |
640 | end_freq_khz = center_freq_khz + (bw_khz/2); | |
641 | ||
642 | if (start_freq_khz >= freq_range->start_freq_khz && | |
643 | end_freq_khz <= freq_range->end_freq_khz) | |
644 | return true; | |
645 | ||
646 | return false; | |
b2e1b302 | 647 | } |
8318d78a | 648 | |
0c7dc45d LR |
649 | /** |
650 | * freq_in_rule_band - tells us if a frequency is in a frequency band | |
651 | * @freq_range: frequency rule we want to query | |
652 | * @freq_khz: frequency we are inquiring about | |
653 | * | |
654 | * This lets us know if a specific frequency rule is or is not relevant to | |
655 | * a specific frequency's band. Bands are device specific and artificial | |
64629b9d VK |
656 | * definitions (the "2.4 GHz band", the "5 GHz band" and the "60GHz band"), |
657 | * however it is safe for now to assume that a frequency rule should not be | |
658 | * part of a frequency's band if the start freq or end freq are off by more | |
659 | * than 2 GHz for the 2.4 and 5 GHz bands, and by more than 10 GHz for the | |
660 | * 60 GHz band. | |
0c7dc45d LR |
661 | * This resolution can be lowered and should be considered as we add |
662 | * regulatory rule support for other "bands". | |
663 | **/ | |
664 | static bool freq_in_rule_band(const struct ieee80211_freq_range *freq_range, | |
1a919318 | 665 | u32 freq_khz) |
0c7dc45d LR |
666 | { |
667 | #define ONE_GHZ_IN_KHZ 1000000 | |
64629b9d VK |
668 | /* |
669 | * From 802.11ad: directional multi-gigabit (DMG): | |
670 | * Pertaining to operation in a frequency band containing a channel | |
671 | * with the Channel starting frequency above 45 GHz. | |
672 | */ | |
673 | u32 limit = freq_khz > 45 * ONE_GHZ_IN_KHZ ? | |
674 | 10 * ONE_GHZ_IN_KHZ : 2 * ONE_GHZ_IN_KHZ; | |
675 | if (abs(freq_khz - freq_range->start_freq_khz) <= limit) | |
0c7dc45d | 676 | return true; |
64629b9d | 677 | if (abs(freq_khz - freq_range->end_freq_khz) <= limit) |
0c7dc45d LR |
678 | return true; |
679 | return false; | |
680 | #undef ONE_GHZ_IN_KHZ | |
681 | } | |
682 | ||
adbfb058 LR |
683 | /* |
684 | * Later on we can perhaps use the more restrictive DFS | |
685 | * region but we don't have information for that yet so | |
686 | * for now simply disallow conflicts. | |
687 | */ | |
688 | static enum nl80211_dfs_regions | |
689 | reg_intersect_dfs_region(const enum nl80211_dfs_regions dfs_region1, | |
690 | const enum nl80211_dfs_regions dfs_region2) | |
691 | { | |
692 | if (dfs_region1 != dfs_region2) | |
693 | return NL80211_DFS_UNSET; | |
694 | return dfs_region1; | |
695 | } | |
696 | ||
fb1fc7ad LR |
697 | /* |
698 | * Helper for regdom_intersect(), this does the real | |
699 | * mathematical intersection fun | |
700 | */ | |
97524820 JD |
701 | static int reg_rules_intersect(const struct ieee80211_regdomain *rd1, |
702 | const struct ieee80211_regdomain *rd2, | |
703 | const struct ieee80211_reg_rule *rule1, | |
1a919318 JB |
704 | const struct ieee80211_reg_rule *rule2, |
705 | struct ieee80211_reg_rule *intersected_rule) | |
9c96477d LR |
706 | { |
707 | const struct ieee80211_freq_range *freq_range1, *freq_range2; | |
708 | struct ieee80211_freq_range *freq_range; | |
709 | const struct ieee80211_power_rule *power_rule1, *power_rule2; | |
710 | struct ieee80211_power_rule *power_rule; | |
97524820 | 711 | u32 freq_diff, max_bandwidth1, max_bandwidth2; |
9c96477d LR |
712 | |
713 | freq_range1 = &rule1->freq_range; | |
714 | freq_range2 = &rule2->freq_range; | |
715 | freq_range = &intersected_rule->freq_range; | |
716 | ||
717 | power_rule1 = &rule1->power_rule; | |
718 | power_rule2 = &rule2->power_rule; | |
719 | power_rule = &intersected_rule->power_rule; | |
720 | ||
721 | freq_range->start_freq_khz = max(freq_range1->start_freq_khz, | |
1a919318 | 722 | freq_range2->start_freq_khz); |
9c96477d | 723 | freq_range->end_freq_khz = min(freq_range1->end_freq_khz, |
1a919318 | 724 | freq_range2->end_freq_khz); |
97524820 JD |
725 | |
726 | max_bandwidth1 = freq_range1->max_bandwidth_khz; | |
727 | max_bandwidth2 = freq_range2->max_bandwidth_khz; | |
728 | ||
b0dfd2ea JD |
729 | if (rule1->flags & NL80211_RRF_AUTO_BW) |
730 | max_bandwidth1 = reg_get_max_bandwidth(rd1, rule1); | |
731 | if (rule2->flags & NL80211_RRF_AUTO_BW) | |
732 | max_bandwidth2 = reg_get_max_bandwidth(rd2, rule2); | |
97524820 JD |
733 | |
734 | freq_range->max_bandwidth_khz = min(max_bandwidth1, max_bandwidth2); | |
9c96477d | 735 | |
b0dfd2ea JD |
736 | intersected_rule->flags = rule1->flags | rule2->flags; |
737 | ||
738 | /* | |
739 | * In case NL80211_RRF_AUTO_BW requested for both rules | |
740 | * set AUTO_BW in intersected rule also. Next we will | |
741 | * calculate BW correctly in handle_channel function. | |
742 | * In other case remove AUTO_BW flag while we calculate | |
743 | * maximum bandwidth correctly and auto calculation is | |
744 | * not required. | |
745 | */ | |
746 | if ((rule1->flags & NL80211_RRF_AUTO_BW) && | |
747 | (rule2->flags & NL80211_RRF_AUTO_BW)) | |
748 | intersected_rule->flags |= NL80211_RRF_AUTO_BW; | |
749 | else | |
750 | intersected_rule->flags &= ~NL80211_RRF_AUTO_BW; | |
751 | ||
9c96477d LR |
752 | freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz; |
753 | if (freq_range->max_bandwidth_khz > freq_diff) | |
754 | freq_range->max_bandwidth_khz = freq_diff; | |
755 | ||
756 | power_rule->max_eirp = min(power_rule1->max_eirp, | |
757 | power_rule2->max_eirp); | |
758 | power_rule->max_antenna_gain = min(power_rule1->max_antenna_gain, | |
759 | power_rule2->max_antenna_gain); | |
760 | ||
089027e5 JD |
761 | intersected_rule->dfs_cac_ms = max(rule1->dfs_cac_ms, |
762 | rule2->dfs_cac_ms); | |
763 | ||
9c96477d LR |
764 | if (!is_valid_reg_rule(intersected_rule)) |
765 | return -EINVAL; | |
766 | ||
767 | return 0; | |
768 | } | |
769 | ||
770 | /** | |
771 | * regdom_intersect - do the intersection between two regulatory domains | |
772 | * @rd1: first regulatory domain | |
773 | * @rd2: second regulatory domain | |
774 | * | |
775 | * Use this function to get the intersection between two regulatory domains. | |
776 | * Once completed we will mark the alpha2 for the rd as intersected, "98", | |
777 | * as no one single alpha2 can represent this regulatory domain. | |
778 | * | |
779 | * Returns a pointer to the regulatory domain structure which will hold the | |
780 | * resulting intersection of rules between rd1 and rd2. We will | |
781 | * kzalloc() this structure for you. | |
782 | */ | |
1a919318 JB |
783 | static struct ieee80211_regdomain * |
784 | regdom_intersect(const struct ieee80211_regdomain *rd1, | |
785 | const struct ieee80211_regdomain *rd2) | |
9c96477d LR |
786 | { |
787 | int r, size_of_regd; | |
788 | unsigned int x, y; | |
789 | unsigned int num_rules = 0, rule_idx = 0; | |
790 | const struct ieee80211_reg_rule *rule1, *rule2; | |
791 | struct ieee80211_reg_rule *intersected_rule; | |
792 | struct ieee80211_regdomain *rd; | |
793 | /* This is just a dummy holder to help us count */ | |
74f53cd8 | 794 | struct ieee80211_reg_rule dummy_rule; |
9c96477d LR |
795 | |
796 | if (!rd1 || !rd2) | |
797 | return NULL; | |
798 | ||
fb1fc7ad LR |
799 | /* |
800 | * First we get a count of the rules we'll need, then we actually | |
9c96477d LR |
801 | * build them. This is to so we can malloc() and free() a |
802 | * regdomain once. The reason we use reg_rules_intersect() here | |
803 | * is it will return -EINVAL if the rule computed makes no sense. | |
fb1fc7ad LR |
804 | * All rules that do check out OK are valid. |
805 | */ | |
9c96477d LR |
806 | |
807 | for (x = 0; x < rd1->n_reg_rules; x++) { | |
808 | rule1 = &rd1->reg_rules[x]; | |
809 | for (y = 0; y < rd2->n_reg_rules; y++) { | |
810 | rule2 = &rd2->reg_rules[y]; | |
97524820 JD |
811 | if (!reg_rules_intersect(rd1, rd2, rule1, rule2, |
812 | &dummy_rule)) | |
9c96477d | 813 | num_rules++; |
9c96477d LR |
814 | } |
815 | } | |
816 | ||
817 | if (!num_rules) | |
818 | return NULL; | |
819 | ||
820 | size_of_regd = sizeof(struct ieee80211_regdomain) + | |
82f20856 | 821 | num_rules * sizeof(struct ieee80211_reg_rule); |
9c96477d LR |
822 | |
823 | rd = kzalloc(size_of_regd, GFP_KERNEL); | |
824 | if (!rd) | |
825 | return NULL; | |
826 | ||
8a57fff0 | 827 | for (x = 0; x < rd1->n_reg_rules && rule_idx < num_rules; x++) { |
9c96477d | 828 | rule1 = &rd1->reg_rules[x]; |
8a57fff0 | 829 | for (y = 0; y < rd2->n_reg_rules && rule_idx < num_rules; y++) { |
9c96477d | 830 | rule2 = &rd2->reg_rules[y]; |
fb1fc7ad LR |
831 | /* |
832 | * This time around instead of using the stack lets | |
9c96477d | 833 | * write to the target rule directly saving ourselves |
fb1fc7ad LR |
834 | * a memcpy() |
835 | */ | |
9c96477d | 836 | intersected_rule = &rd->reg_rules[rule_idx]; |
97524820 JD |
837 | r = reg_rules_intersect(rd1, rd2, rule1, rule2, |
838 | intersected_rule); | |
fb1fc7ad LR |
839 | /* |
840 | * No need to memset here the intersected rule here as | |
841 | * we're not using the stack anymore | |
842 | */ | |
9c96477d LR |
843 | if (r) |
844 | continue; | |
845 | rule_idx++; | |
846 | } | |
847 | } | |
848 | ||
849 | if (rule_idx != num_rules) { | |
850 | kfree(rd); | |
851 | return NULL; | |
852 | } | |
853 | ||
854 | rd->n_reg_rules = num_rules; | |
855 | rd->alpha2[0] = '9'; | |
856 | rd->alpha2[1] = '8'; | |
adbfb058 LR |
857 | rd->dfs_region = reg_intersect_dfs_region(rd1->dfs_region, |
858 | rd2->dfs_region); | |
9c96477d LR |
859 | |
860 | return rd; | |
861 | } | |
862 | ||
fb1fc7ad LR |
863 | /* |
864 | * XXX: add support for the rest of enum nl80211_reg_rule_flags, we may | |
865 | * want to just have the channel structure use these | |
866 | */ | |
b2e1b302 LR |
867 | static u32 map_regdom_flags(u32 rd_flags) |
868 | { | |
869 | u32 channel_flags = 0; | |
8fe02e16 LR |
870 | if (rd_flags & NL80211_RRF_NO_IR_ALL) |
871 | channel_flags |= IEEE80211_CHAN_NO_IR; | |
b2e1b302 LR |
872 | if (rd_flags & NL80211_RRF_DFS) |
873 | channel_flags |= IEEE80211_CHAN_RADAR; | |
03f6b084 SF |
874 | if (rd_flags & NL80211_RRF_NO_OFDM) |
875 | channel_flags |= IEEE80211_CHAN_NO_OFDM; | |
570dbde1 DS |
876 | if (rd_flags & NL80211_RRF_NO_OUTDOOR) |
877 | channel_flags |= IEEE80211_CHAN_INDOOR_ONLY; | |
b2e1b302 LR |
878 | return channel_flags; |
879 | } | |
880 | ||
361c9c8b JB |
881 | static const struct ieee80211_reg_rule * |
882 | freq_reg_info_regd(struct wiphy *wiphy, u32 center_freq, | |
883 | const struct ieee80211_regdomain *regd) | |
8318d78a JB |
884 | { |
885 | int i; | |
0c7dc45d | 886 | bool band_rule_found = false; |
038659e7 LR |
887 | bool bw_fits = false; |
888 | ||
3e0c3ff3 | 889 | if (!regd) |
361c9c8b | 890 | return ERR_PTR(-EINVAL); |
b2e1b302 | 891 | |
3e0c3ff3 | 892 | for (i = 0; i < regd->n_reg_rules; i++) { |
b2e1b302 LR |
893 | const struct ieee80211_reg_rule *rr; |
894 | const struct ieee80211_freq_range *fr = NULL; | |
b2e1b302 | 895 | |
3e0c3ff3 | 896 | rr = ®d->reg_rules[i]; |
b2e1b302 | 897 | fr = &rr->freq_range; |
0c7dc45d | 898 | |
fb1fc7ad LR |
899 | /* |
900 | * We only need to know if one frequency rule was | |
0c7dc45d | 901 | * was in center_freq's band, that's enough, so lets |
fb1fc7ad LR |
902 | * not overwrite it once found |
903 | */ | |
0c7dc45d LR |
904 | if (!band_rule_found) |
905 | band_rule_found = freq_in_rule_band(fr, center_freq); | |
906 | ||
fe7ef5e9 | 907 | bw_fits = reg_does_bw_fit(fr, center_freq, MHZ_TO_KHZ(20)); |
0c7dc45d | 908 | |
361c9c8b JB |
909 | if (band_rule_found && bw_fits) |
910 | return rr; | |
8318d78a JB |
911 | } |
912 | ||
0c7dc45d | 913 | if (!band_rule_found) |
361c9c8b | 914 | return ERR_PTR(-ERANGE); |
0c7dc45d | 915 | |
361c9c8b | 916 | return ERR_PTR(-EINVAL); |
b2e1b302 LR |
917 | } |
918 | ||
361c9c8b JB |
919 | const struct ieee80211_reg_rule *freq_reg_info(struct wiphy *wiphy, |
920 | u32 center_freq) | |
1fa25e41 | 921 | { |
5d885b99 | 922 | const struct ieee80211_regdomain *regd; |
1a919318 | 923 | |
e3961af1 | 924 | regd = reg_get_regdomain(wiphy); |
5d885b99 | 925 | |
361c9c8b | 926 | return freq_reg_info_regd(wiphy, center_freq, regd); |
1fa25e41 | 927 | } |
4f366c5d | 928 | EXPORT_SYMBOL(freq_reg_info); |
b2e1b302 | 929 | |
034c6d6e | 930 | const char *reg_initiator_name(enum nl80211_reg_initiator initiator) |
926a0a09 LR |
931 | { |
932 | switch (initiator) { | |
933 | case NL80211_REGDOM_SET_BY_CORE: | |
034c6d6e | 934 | return "core"; |
926a0a09 | 935 | case NL80211_REGDOM_SET_BY_USER: |
034c6d6e | 936 | return "user"; |
926a0a09 | 937 | case NL80211_REGDOM_SET_BY_DRIVER: |
034c6d6e | 938 | return "driver"; |
926a0a09 | 939 | case NL80211_REGDOM_SET_BY_COUNTRY_IE: |
034c6d6e | 940 | return "country IE"; |
926a0a09 LR |
941 | default: |
942 | WARN_ON(1); | |
034c6d6e | 943 | return "bug"; |
926a0a09 LR |
944 | } |
945 | } | |
034c6d6e | 946 | EXPORT_SYMBOL(reg_initiator_name); |
e702d3cf | 947 | |
034c6d6e | 948 | #ifdef CONFIG_CFG80211_REG_DEBUG |
b0dfd2ea JD |
949 | static void chan_reg_rule_print_dbg(const struct ieee80211_regdomain *regd, |
950 | struct ieee80211_channel *chan, | |
e702d3cf LR |
951 | const struct ieee80211_reg_rule *reg_rule) |
952 | { | |
953 | const struct ieee80211_power_rule *power_rule; | |
954 | const struct ieee80211_freq_range *freq_range; | |
b0dfd2ea | 955 | char max_antenna_gain[32], bw[32]; |
e702d3cf LR |
956 | |
957 | power_rule = ®_rule->power_rule; | |
958 | freq_range = ®_rule->freq_range; | |
959 | ||
960 | if (!power_rule->max_antenna_gain) | |
b0dfd2ea | 961 | snprintf(max_antenna_gain, sizeof(max_antenna_gain), "N/A"); |
e702d3cf | 962 | else |
b0dfd2ea JD |
963 | snprintf(max_antenna_gain, sizeof(max_antenna_gain), "%d", |
964 | power_rule->max_antenna_gain); | |
965 | ||
966 | if (reg_rule->flags & NL80211_RRF_AUTO_BW) | |
967 | snprintf(bw, sizeof(bw), "%d KHz, %d KHz AUTO", | |
968 | freq_range->max_bandwidth_khz, | |
969 | reg_get_max_bandwidth(regd, reg_rule)); | |
970 | else | |
971 | snprintf(bw, sizeof(bw), "%d KHz", | |
972 | freq_range->max_bandwidth_khz); | |
e702d3cf | 973 | |
fe7ef5e9 JB |
974 | REG_DBG_PRINT("Updating information on frequency %d MHz with regulatory rule:\n", |
975 | chan->center_freq); | |
e702d3cf | 976 | |
b0dfd2ea | 977 | REG_DBG_PRINT("%d KHz - %d KHz @ %s), (%s mBi, %d mBm)\n", |
1a919318 | 978 | freq_range->start_freq_khz, freq_range->end_freq_khz, |
b0dfd2ea | 979 | bw, max_antenna_gain, |
e702d3cf LR |
980 | power_rule->max_eirp); |
981 | } | |
982 | #else | |
b0dfd2ea JD |
983 | static void chan_reg_rule_print_dbg(const struct ieee80211_regdomain *regd, |
984 | struct ieee80211_channel *chan, | |
e702d3cf LR |
985 | const struct ieee80211_reg_rule *reg_rule) |
986 | { | |
987 | return; | |
988 | } | |
926a0a09 LR |
989 | #endif |
990 | ||
038659e7 LR |
991 | /* |
992 | * Note that right now we assume the desired channel bandwidth | |
993 | * is always 20 MHz for each individual channel (HT40 uses 20 MHz | |
fe7ef5e9 | 994 | * per channel, the primary and the extension channel). |
038659e7 | 995 | */ |
7ca43d03 LR |
996 | static void handle_channel(struct wiphy *wiphy, |
997 | enum nl80211_reg_initiator initiator, | |
fdc9d7b2 | 998 | struct ieee80211_channel *chan) |
b2e1b302 | 999 | { |
038659e7 | 1000 | u32 flags, bw_flags = 0; |
b2e1b302 LR |
1001 | const struct ieee80211_reg_rule *reg_rule = NULL; |
1002 | const struct ieee80211_power_rule *power_rule = NULL; | |
038659e7 | 1003 | const struct ieee80211_freq_range *freq_range = NULL; |
fe33eb39 | 1004 | struct wiphy *request_wiphy = NULL; |
c492db37 | 1005 | struct regulatory_request *lr = get_last_request(); |
97524820 JD |
1006 | const struct ieee80211_regdomain *regd; |
1007 | u32 max_bandwidth_khz; | |
a92a3ce7 | 1008 | |
c492db37 | 1009 | request_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx); |
a92a3ce7 LR |
1010 | |
1011 | flags = chan->orig_flags; | |
b2e1b302 | 1012 | |
361c9c8b JB |
1013 | reg_rule = freq_reg_info(wiphy, MHZ_TO_KHZ(chan->center_freq)); |
1014 | if (IS_ERR(reg_rule)) { | |
ca4ffe8f LR |
1015 | /* |
1016 | * We will disable all channels that do not match our | |
25985edc | 1017 | * received regulatory rule unless the hint is coming |
ca4ffe8f LR |
1018 | * from a Country IE and the Country IE had no information |
1019 | * about a band. The IEEE 802.11 spec allows for an AP | |
1020 | * to send only a subset of the regulatory rules allowed, | |
1021 | * so an AP in the US that only supports 2.4 GHz may only send | |
1022 | * a country IE with information for the 2.4 GHz band | |
1023 | * while 5 GHz is still supported. | |
1024 | */ | |
1025 | if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE && | |
361c9c8b | 1026 | PTR_ERR(reg_rule) == -ERANGE) |
ca4ffe8f LR |
1027 | return; |
1028 | ||
cc493e4f LR |
1029 | if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER && |
1030 | request_wiphy && request_wiphy == wiphy && | |
a2f73b6c | 1031 | request_wiphy->regulatory_flags & REGULATORY_STRICT_REG) { |
cc493e4f LR |
1032 | REG_DBG_PRINT("Disabling freq %d MHz for good\n", |
1033 | chan->center_freq); | |
1034 | chan->orig_flags |= IEEE80211_CHAN_DISABLED; | |
1035 | chan->flags = chan->orig_flags; | |
1036 | } else { | |
1037 | REG_DBG_PRINT("Disabling freq %d MHz\n", | |
1038 | chan->center_freq); | |
1039 | chan->flags |= IEEE80211_CHAN_DISABLED; | |
1040 | } | |
8318d78a | 1041 | return; |
ca4ffe8f | 1042 | } |
8318d78a | 1043 | |
b0dfd2ea JD |
1044 | regd = reg_get_regdomain(wiphy); |
1045 | chan_reg_rule_print_dbg(regd, chan, reg_rule); | |
e702d3cf | 1046 | |
b2e1b302 | 1047 | power_rule = ®_rule->power_rule; |
038659e7 LR |
1048 | freq_range = ®_rule->freq_range; |
1049 | ||
97524820 JD |
1050 | max_bandwidth_khz = freq_range->max_bandwidth_khz; |
1051 | /* Check if auto calculation requested */ | |
b0dfd2ea | 1052 | if (reg_rule->flags & NL80211_RRF_AUTO_BW) |
97524820 | 1053 | max_bandwidth_khz = reg_get_max_bandwidth(regd, reg_rule); |
97524820 JD |
1054 | |
1055 | if (max_bandwidth_khz < MHZ_TO_KHZ(40)) | |
038659e7 | 1056 | bw_flags = IEEE80211_CHAN_NO_HT40; |
97524820 | 1057 | if (max_bandwidth_khz < MHZ_TO_KHZ(80)) |
c7a6ee27 | 1058 | bw_flags |= IEEE80211_CHAN_NO_80MHZ; |
97524820 | 1059 | if (max_bandwidth_khz < MHZ_TO_KHZ(160)) |
c7a6ee27 | 1060 | bw_flags |= IEEE80211_CHAN_NO_160MHZ; |
b2e1b302 | 1061 | |
c492db37 | 1062 | if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER && |
806a9e39 | 1063 | request_wiphy && request_wiphy == wiphy && |
a2f73b6c | 1064 | request_wiphy->regulatory_flags & REGULATORY_STRICT_REG) { |
fb1fc7ad | 1065 | /* |
25985edc | 1066 | * This guarantees the driver's requested regulatory domain |
f976376d | 1067 | * will always be used as a base for further regulatory |
fb1fc7ad LR |
1068 | * settings |
1069 | */ | |
f976376d | 1070 | chan->flags = chan->orig_flags = |
038659e7 | 1071 | map_regdom_flags(reg_rule->flags) | bw_flags; |
f976376d LR |
1072 | chan->max_antenna_gain = chan->orig_mag = |
1073 | (int) MBI_TO_DBI(power_rule->max_antenna_gain); | |
279f0f55 | 1074 | chan->max_reg_power = chan->max_power = chan->orig_mpwr = |
f976376d LR |
1075 | (int) MBM_TO_DBM(power_rule->max_eirp); |
1076 | return; | |
1077 | } | |
1078 | ||
04f39047 SW |
1079 | chan->dfs_state = NL80211_DFS_USABLE; |
1080 | chan->dfs_state_entered = jiffies; | |
1081 | ||
aa3d7eef | 1082 | chan->beacon_found = false; |
038659e7 | 1083 | chan->flags = flags | bw_flags | map_regdom_flags(reg_rule->flags); |
1a919318 JB |
1084 | chan->max_antenna_gain = |
1085 | min_t(int, chan->orig_mag, | |
1086 | MBI_TO_DBI(power_rule->max_antenna_gain)); | |
eccc068e | 1087 | chan->max_reg_power = (int) MBM_TO_DBM(power_rule->max_eirp); |
089027e5 JD |
1088 | |
1089 | if (chan->flags & IEEE80211_CHAN_RADAR) { | |
1090 | if (reg_rule->dfs_cac_ms) | |
1091 | chan->dfs_cac_ms = reg_rule->dfs_cac_ms; | |
1092 | else | |
1093 | chan->dfs_cac_ms = IEEE80211_DFS_MIN_CAC_TIME_MS; | |
1094 | } | |
1095 | ||
5e31fc08 SG |
1096 | if (chan->orig_mpwr) { |
1097 | /* | |
a09a85a0 LR |
1098 | * Devices that use REGULATORY_COUNTRY_IE_FOLLOW_POWER |
1099 | * will always follow the passed country IE power settings. | |
5e31fc08 SG |
1100 | */ |
1101 | if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE && | |
a09a85a0 | 1102 | wiphy->regulatory_flags & REGULATORY_COUNTRY_IE_FOLLOW_POWER) |
5e31fc08 SG |
1103 | chan->max_power = chan->max_reg_power; |
1104 | else | |
1105 | chan->max_power = min(chan->orig_mpwr, | |
1106 | chan->max_reg_power); | |
1107 | } else | |
1108 | chan->max_power = chan->max_reg_power; | |
8318d78a JB |
1109 | } |
1110 | ||
7ca43d03 | 1111 | static void handle_band(struct wiphy *wiphy, |
fdc9d7b2 JB |
1112 | enum nl80211_reg_initiator initiator, |
1113 | struct ieee80211_supported_band *sband) | |
8318d78a | 1114 | { |
a92a3ce7 | 1115 | unsigned int i; |
a92a3ce7 | 1116 | |
fdc9d7b2 JB |
1117 | if (!sband) |
1118 | return; | |
8318d78a JB |
1119 | |
1120 | for (i = 0; i < sband->n_channels; i++) | |
fdc9d7b2 | 1121 | handle_channel(wiphy, initiator, &sband->channels[i]); |
8318d78a JB |
1122 | } |
1123 | ||
57b5ce07 LR |
1124 | static bool reg_request_cell_base(struct regulatory_request *request) |
1125 | { | |
1126 | if (request->initiator != NL80211_REGDOM_SET_BY_USER) | |
1127 | return false; | |
1a919318 | 1128 | return request->user_reg_hint_type == NL80211_USER_REG_HINT_CELL_BASE; |
57b5ce07 LR |
1129 | } |
1130 | ||
1131 | bool reg_last_request_cell_base(void) | |
1132 | { | |
38fd2143 | 1133 | return reg_request_cell_base(get_last_request()); |
57b5ce07 LR |
1134 | } |
1135 | ||
94fc661f | 1136 | #ifdef CONFIG_CFG80211_REG_CELLULAR_HINTS |
57b5ce07 | 1137 | /* Core specific check */ |
2f92212b JB |
1138 | static enum reg_request_treatment |
1139 | reg_ignore_cell_hint(struct regulatory_request *pending_request) | |
57b5ce07 | 1140 | { |
c492db37 JB |
1141 | struct regulatory_request *lr = get_last_request(); |
1142 | ||
57b5ce07 | 1143 | if (!reg_num_devs_support_basehint) |
2f92212b | 1144 | return REG_REQ_IGNORE; |
57b5ce07 | 1145 | |
c492db37 | 1146 | if (reg_request_cell_base(lr) && |
1a919318 | 1147 | !regdom_changes(pending_request->alpha2)) |
2f92212b | 1148 | return REG_REQ_ALREADY_SET; |
1a919318 | 1149 | |
2f92212b | 1150 | return REG_REQ_OK; |
57b5ce07 LR |
1151 | } |
1152 | ||
1153 | /* Device specific check */ | |
1154 | static bool reg_dev_ignore_cell_hint(struct wiphy *wiphy) | |
1155 | { | |
1a919318 | 1156 | return !(wiphy->features & NL80211_FEATURE_CELL_BASE_REG_HINTS); |
57b5ce07 LR |
1157 | } |
1158 | #else | |
1159 | static int reg_ignore_cell_hint(struct regulatory_request *pending_request) | |
1160 | { | |
2f92212b | 1161 | return REG_REQ_IGNORE; |
57b5ce07 | 1162 | } |
1a919318 JB |
1163 | |
1164 | static bool reg_dev_ignore_cell_hint(struct wiphy *wiphy) | |
57b5ce07 LR |
1165 | { |
1166 | return true; | |
1167 | } | |
1168 | #endif | |
1169 | ||
fa1fb9cb LR |
1170 | static bool wiphy_strict_alpha2_regd(struct wiphy *wiphy) |
1171 | { | |
a2f73b6c LR |
1172 | if (wiphy->regulatory_flags & REGULATORY_STRICT_REG && |
1173 | !(wiphy->regulatory_flags & REGULATORY_CUSTOM_REG)) | |
fa1fb9cb LR |
1174 | return true; |
1175 | return false; | |
1176 | } | |
57b5ce07 | 1177 | |
7db90f4a LR |
1178 | static bool ignore_reg_update(struct wiphy *wiphy, |
1179 | enum nl80211_reg_initiator initiator) | |
14b9815a | 1180 | { |
c492db37 JB |
1181 | struct regulatory_request *lr = get_last_request(); |
1182 | ||
1183 | if (!lr) { | |
034c6d6e LR |
1184 | REG_DBG_PRINT("Ignoring regulatory request set by %s " |
1185 | "since last_request is not set\n", | |
926a0a09 | 1186 | reg_initiator_name(initiator)); |
14b9815a | 1187 | return true; |
926a0a09 LR |
1188 | } |
1189 | ||
7db90f4a | 1190 | if (initiator == NL80211_REGDOM_SET_BY_CORE && |
a2f73b6c | 1191 | wiphy->regulatory_flags & REGULATORY_CUSTOM_REG) { |
034c6d6e LR |
1192 | REG_DBG_PRINT("Ignoring regulatory request set by %s " |
1193 | "since the driver uses its own custom " | |
1194 | "regulatory domain\n", | |
926a0a09 | 1195 | reg_initiator_name(initiator)); |
14b9815a | 1196 | return true; |
926a0a09 LR |
1197 | } |
1198 | ||
fb1fc7ad LR |
1199 | /* |
1200 | * wiphy->regd will be set once the device has its own | |
1201 | * desired regulatory domain set | |
1202 | */ | |
fa1fb9cb | 1203 | if (wiphy_strict_alpha2_regd(wiphy) && !wiphy->regd && |
749b527b | 1204 | initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && |
c492db37 | 1205 | !is_world_regdom(lr->alpha2)) { |
034c6d6e LR |
1206 | REG_DBG_PRINT("Ignoring regulatory request set by %s " |
1207 | "since the driver requires its own regulatory " | |
1208 | "domain to be set first\n", | |
926a0a09 | 1209 | reg_initiator_name(initiator)); |
14b9815a | 1210 | return true; |
926a0a09 LR |
1211 | } |
1212 | ||
c492db37 | 1213 | if (reg_request_cell_base(lr)) |
57b5ce07 LR |
1214 | return reg_dev_ignore_cell_hint(wiphy); |
1215 | ||
14b9815a LR |
1216 | return false; |
1217 | } | |
1218 | ||
3195e489 LR |
1219 | static bool reg_is_world_roaming(struct wiphy *wiphy) |
1220 | { | |
1221 | const struct ieee80211_regdomain *cr = get_cfg80211_regdom(); | |
1222 | const struct ieee80211_regdomain *wr = get_wiphy_regdom(wiphy); | |
1223 | struct regulatory_request *lr = get_last_request(); | |
1224 | ||
1225 | if (is_world_regdom(cr->alpha2) || (wr && is_world_regdom(wr->alpha2))) | |
1226 | return true; | |
1227 | ||
1228 | if (lr && lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && | |
a2f73b6c | 1229 | wiphy->regulatory_flags & REGULATORY_CUSTOM_REG) |
3195e489 LR |
1230 | return true; |
1231 | ||
1232 | return false; | |
1233 | } | |
1234 | ||
1a919318 | 1235 | static void handle_reg_beacon(struct wiphy *wiphy, unsigned int chan_idx, |
e38f8a7a LR |
1236 | struct reg_beacon *reg_beacon) |
1237 | { | |
e38f8a7a LR |
1238 | struct ieee80211_supported_band *sband; |
1239 | struct ieee80211_channel *chan; | |
6bad8766 LR |
1240 | bool channel_changed = false; |
1241 | struct ieee80211_channel chan_before; | |
e38f8a7a | 1242 | |
e38f8a7a LR |
1243 | sband = wiphy->bands[reg_beacon->chan.band]; |
1244 | chan = &sband->channels[chan_idx]; | |
1245 | ||
1246 | if (likely(chan->center_freq != reg_beacon->chan.center_freq)) | |
1247 | return; | |
1248 | ||
6bad8766 LR |
1249 | if (chan->beacon_found) |
1250 | return; | |
1251 | ||
1252 | chan->beacon_found = true; | |
1253 | ||
0f500a5f LR |
1254 | if (!reg_is_world_roaming(wiphy)) |
1255 | return; | |
1256 | ||
a2f73b6c | 1257 | if (wiphy->regulatory_flags & REGULATORY_DISABLE_BEACON_HINTS) |
37184244 LR |
1258 | return; |
1259 | ||
6bad8766 LR |
1260 | chan_before.center_freq = chan->center_freq; |
1261 | chan_before.flags = chan->flags; | |
1262 | ||
8fe02e16 LR |
1263 | if (chan->flags & IEEE80211_CHAN_NO_IR) { |
1264 | chan->flags &= ~IEEE80211_CHAN_NO_IR; | |
6bad8766 | 1265 | channel_changed = true; |
e38f8a7a LR |
1266 | } |
1267 | ||
6bad8766 LR |
1268 | if (channel_changed) |
1269 | nl80211_send_beacon_hint_event(wiphy, &chan_before, chan); | |
e38f8a7a LR |
1270 | } |
1271 | ||
1272 | /* | |
1273 | * Called when a scan on a wiphy finds a beacon on | |
1274 | * new channel | |
1275 | */ | |
1276 | static void wiphy_update_new_beacon(struct wiphy *wiphy, | |
1277 | struct reg_beacon *reg_beacon) | |
1278 | { | |
1279 | unsigned int i; | |
1280 | struct ieee80211_supported_band *sband; | |
1281 | ||
e38f8a7a LR |
1282 | if (!wiphy->bands[reg_beacon->chan.band]) |
1283 | return; | |
1284 | ||
1285 | sband = wiphy->bands[reg_beacon->chan.band]; | |
1286 | ||
1287 | for (i = 0; i < sband->n_channels; i++) | |
1288 | handle_reg_beacon(wiphy, i, reg_beacon); | |
1289 | } | |
1290 | ||
1291 | /* | |
1292 | * Called upon reg changes or a new wiphy is added | |
1293 | */ | |
1294 | static void wiphy_update_beacon_reg(struct wiphy *wiphy) | |
1295 | { | |
1296 | unsigned int i; | |
1297 | struct ieee80211_supported_band *sband; | |
1298 | struct reg_beacon *reg_beacon; | |
1299 | ||
e38f8a7a LR |
1300 | list_for_each_entry(reg_beacon, ®_beacon_list, list) { |
1301 | if (!wiphy->bands[reg_beacon->chan.band]) | |
1302 | continue; | |
1303 | sband = wiphy->bands[reg_beacon->chan.band]; | |
1304 | for (i = 0; i < sband->n_channels; i++) | |
1305 | handle_reg_beacon(wiphy, i, reg_beacon); | |
1306 | } | |
1307 | } | |
1308 | ||
e38f8a7a LR |
1309 | /* Reap the advantages of previously found beacons */ |
1310 | static void reg_process_beacons(struct wiphy *wiphy) | |
1311 | { | |
b1ed8ddd LR |
1312 | /* |
1313 | * Means we are just firing up cfg80211, so no beacons would | |
1314 | * have been processed yet. | |
1315 | */ | |
1316 | if (!last_request) | |
1317 | return; | |
e38f8a7a LR |
1318 | wiphy_update_beacon_reg(wiphy); |
1319 | } | |
1320 | ||
1a919318 | 1321 | static bool is_ht40_allowed(struct ieee80211_channel *chan) |
038659e7 LR |
1322 | { |
1323 | if (!chan) | |
1a919318 | 1324 | return false; |
038659e7 | 1325 | if (chan->flags & IEEE80211_CHAN_DISABLED) |
1a919318 | 1326 | return false; |
038659e7 | 1327 | /* This would happen when regulatory rules disallow HT40 completely */ |
55b183ad FF |
1328 | if ((chan->flags & IEEE80211_CHAN_NO_HT40) == IEEE80211_CHAN_NO_HT40) |
1329 | return false; | |
1330 | return true; | |
038659e7 LR |
1331 | } |
1332 | ||
1333 | static void reg_process_ht_flags_channel(struct wiphy *wiphy, | |
fdc9d7b2 | 1334 | struct ieee80211_channel *channel) |
038659e7 | 1335 | { |
fdc9d7b2 | 1336 | struct ieee80211_supported_band *sband = wiphy->bands[channel->band]; |
038659e7 LR |
1337 | struct ieee80211_channel *channel_before = NULL, *channel_after = NULL; |
1338 | unsigned int i; | |
1339 | ||
1a919318 | 1340 | if (!is_ht40_allowed(channel)) { |
038659e7 LR |
1341 | channel->flags |= IEEE80211_CHAN_NO_HT40; |
1342 | return; | |
1343 | } | |
1344 | ||
1345 | /* | |
1346 | * We need to ensure the extension channels exist to | |
1347 | * be able to use HT40- or HT40+, this finds them (or not) | |
1348 | */ | |
1349 | for (i = 0; i < sband->n_channels; i++) { | |
1350 | struct ieee80211_channel *c = &sband->channels[i]; | |
1a919318 | 1351 | |
038659e7 LR |
1352 | if (c->center_freq == (channel->center_freq - 20)) |
1353 | channel_before = c; | |
1354 | if (c->center_freq == (channel->center_freq + 20)) | |
1355 | channel_after = c; | |
1356 | } | |
1357 | ||
1358 | /* | |
1359 | * Please note that this assumes target bandwidth is 20 MHz, | |
1360 | * if that ever changes we also need to change the below logic | |
1361 | * to include that as well. | |
1362 | */ | |
1a919318 | 1363 | if (!is_ht40_allowed(channel_before)) |
689da1b3 | 1364 | channel->flags |= IEEE80211_CHAN_NO_HT40MINUS; |
038659e7 | 1365 | else |
689da1b3 | 1366 | channel->flags &= ~IEEE80211_CHAN_NO_HT40MINUS; |
038659e7 | 1367 | |
1a919318 | 1368 | if (!is_ht40_allowed(channel_after)) |
689da1b3 | 1369 | channel->flags |= IEEE80211_CHAN_NO_HT40PLUS; |
038659e7 | 1370 | else |
689da1b3 | 1371 | channel->flags &= ~IEEE80211_CHAN_NO_HT40PLUS; |
038659e7 LR |
1372 | } |
1373 | ||
1374 | static void reg_process_ht_flags_band(struct wiphy *wiphy, | |
fdc9d7b2 | 1375 | struct ieee80211_supported_band *sband) |
038659e7 LR |
1376 | { |
1377 | unsigned int i; | |
038659e7 | 1378 | |
fdc9d7b2 JB |
1379 | if (!sband) |
1380 | return; | |
038659e7 LR |
1381 | |
1382 | for (i = 0; i < sband->n_channels; i++) | |
fdc9d7b2 | 1383 | reg_process_ht_flags_channel(wiphy, &sband->channels[i]); |
038659e7 LR |
1384 | } |
1385 | ||
1386 | static void reg_process_ht_flags(struct wiphy *wiphy) | |
1387 | { | |
1388 | enum ieee80211_band band; | |
1389 | ||
1390 | if (!wiphy) | |
1391 | return; | |
1392 | ||
fdc9d7b2 JB |
1393 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) |
1394 | reg_process_ht_flags_band(wiphy, wiphy->bands[band]); | |
038659e7 LR |
1395 | } |
1396 | ||
0e3802db LR |
1397 | static void reg_call_notifier(struct wiphy *wiphy, |
1398 | struct regulatory_request *request) | |
1399 | { | |
1400 | if (wiphy->reg_notifier) | |
1401 | wiphy->reg_notifier(wiphy, request); | |
1402 | } | |
1403 | ||
eac03e38 SN |
1404 | static void wiphy_update_regulatory(struct wiphy *wiphy, |
1405 | enum nl80211_reg_initiator initiator) | |
b2e1b302 LR |
1406 | { |
1407 | enum ieee80211_band band; | |
c492db37 | 1408 | struct regulatory_request *lr = get_last_request(); |
eac03e38 | 1409 | |
0e3802db LR |
1410 | if (ignore_reg_update(wiphy, initiator)) { |
1411 | /* | |
1412 | * Regulatory updates set by CORE are ignored for custom | |
1413 | * regulatory cards. Let us notify the changes to the driver, | |
1414 | * as some drivers used this to restore its orig_* reg domain. | |
1415 | */ | |
1416 | if (initiator == NL80211_REGDOM_SET_BY_CORE && | |
a2f73b6c | 1417 | wiphy->regulatory_flags & REGULATORY_CUSTOM_REG) |
0e3802db | 1418 | reg_call_notifier(wiphy, lr); |
a203c2aa | 1419 | return; |
0e3802db | 1420 | } |
a203c2aa | 1421 | |
c492db37 | 1422 | lr->dfs_region = get_cfg80211_regdom()->dfs_region; |
b68e6b3b | 1423 | |
fdc9d7b2 JB |
1424 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) |
1425 | handle_band(wiphy, initiator, wiphy->bands[band]); | |
a203c2aa | 1426 | |
e38f8a7a | 1427 | reg_process_beacons(wiphy); |
038659e7 | 1428 | reg_process_ht_flags(wiphy); |
0e3802db | 1429 | reg_call_notifier(wiphy, lr); |
b2e1b302 LR |
1430 | } |
1431 | ||
d7549cbb SN |
1432 | static void update_all_wiphy_regulatory(enum nl80211_reg_initiator initiator) |
1433 | { | |
1434 | struct cfg80211_registered_device *rdev; | |
4a38994f | 1435 | struct wiphy *wiphy; |
d7549cbb | 1436 | |
5fe231e8 | 1437 | ASSERT_RTNL(); |
458f4f9e | 1438 | |
4a38994f RM |
1439 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) { |
1440 | wiphy = &rdev->wiphy; | |
1441 | wiphy_update_regulatory(wiphy, initiator); | |
4a38994f | 1442 | } |
d7549cbb SN |
1443 | } |
1444 | ||
1fa25e41 | 1445 | static void handle_channel_custom(struct wiphy *wiphy, |
fdc9d7b2 | 1446 | struct ieee80211_channel *chan, |
1fa25e41 LR |
1447 | const struct ieee80211_regdomain *regd) |
1448 | { | |
038659e7 | 1449 | u32 bw_flags = 0; |
1fa25e41 LR |
1450 | const struct ieee80211_reg_rule *reg_rule = NULL; |
1451 | const struct ieee80211_power_rule *power_rule = NULL; | |
038659e7 | 1452 | const struct ieee80211_freq_range *freq_range = NULL; |
97524820 | 1453 | u32 max_bandwidth_khz; |
ac46d48e | 1454 | |
361c9c8b JB |
1455 | reg_rule = freq_reg_info_regd(wiphy, MHZ_TO_KHZ(chan->center_freq), |
1456 | regd); | |
1fa25e41 | 1457 | |
361c9c8b | 1458 | if (IS_ERR(reg_rule)) { |
fe7ef5e9 JB |
1459 | REG_DBG_PRINT("Disabling freq %d MHz as custom regd has no rule that fits it\n", |
1460 | chan->center_freq); | |
cc493e4f LR |
1461 | chan->orig_flags |= IEEE80211_CHAN_DISABLED; |
1462 | chan->flags = chan->orig_flags; | |
1fa25e41 LR |
1463 | return; |
1464 | } | |
1465 | ||
b0dfd2ea | 1466 | chan_reg_rule_print_dbg(regd, chan, reg_rule); |
e702d3cf | 1467 | |
1fa25e41 | 1468 | power_rule = ®_rule->power_rule; |
038659e7 LR |
1469 | freq_range = ®_rule->freq_range; |
1470 | ||
97524820 JD |
1471 | max_bandwidth_khz = freq_range->max_bandwidth_khz; |
1472 | /* Check if auto calculation requested */ | |
b0dfd2ea | 1473 | if (reg_rule->flags & NL80211_RRF_AUTO_BW) |
97524820 JD |
1474 | max_bandwidth_khz = reg_get_max_bandwidth(regd, reg_rule); |
1475 | ||
1476 | if (max_bandwidth_khz < MHZ_TO_KHZ(40)) | |
038659e7 | 1477 | bw_flags = IEEE80211_CHAN_NO_HT40; |
97524820 | 1478 | if (max_bandwidth_khz < MHZ_TO_KHZ(80)) |
c7a6ee27 | 1479 | bw_flags |= IEEE80211_CHAN_NO_80MHZ; |
97524820 | 1480 | if (max_bandwidth_khz < MHZ_TO_KHZ(160)) |
c7a6ee27 | 1481 | bw_flags |= IEEE80211_CHAN_NO_160MHZ; |
1fa25e41 | 1482 | |
038659e7 | 1483 | chan->flags |= map_regdom_flags(reg_rule->flags) | bw_flags; |
1fa25e41 | 1484 | chan->max_antenna_gain = (int) MBI_TO_DBI(power_rule->max_antenna_gain); |
279f0f55 FF |
1485 | chan->max_reg_power = chan->max_power = |
1486 | (int) MBM_TO_DBM(power_rule->max_eirp); | |
1fa25e41 LR |
1487 | } |
1488 | ||
fdc9d7b2 JB |
1489 | static void handle_band_custom(struct wiphy *wiphy, |
1490 | struct ieee80211_supported_band *sband, | |
1fa25e41 LR |
1491 | const struct ieee80211_regdomain *regd) |
1492 | { | |
1493 | unsigned int i; | |
1fa25e41 | 1494 | |
fdc9d7b2 JB |
1495 | if (!sband) |
1496 | return; | |
1fa25e41 LR |
1497 | |
1498 | for (i = 0; i < sband->n_channels; i++) | |
fdc9d7b2 | 1499 | handle_channel_custom(wiphy, &sband->channels[i], regd); |
1fa25e41 LR |
1500 | } |
1501 | ||
1502 | /* Used by drivers prior to wiphy registration */ | |
1503 | void wiphy_apply_custom_regulatory(struct wiphy *wiphy, | |
1504 | const struct ieee80211_regdomain *regd) | |
1505 | { | |
1506 | enum ieee80211_band band; | |
bbcf3f02 | 1507 | unsigned int bands_set = 0; |
ac46d48e | 1508 | |
a2f73b6c LR |
1509 | WARN(!(wiphy->regulatory_flags & REGULATORY_CUSTOM_REG), |
1510 | "wiphy should have REGULATORY_CUSTOM_REG\n"); | |
1511 | wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG; | |
222ea581 | 1512 | |
1fa25e41 | 1513 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) { |
bbcf3f02 LR |
1514 | if (!wiphy->bands[band]) |
1515 | continue; | |
fdc9d7b2 | 1516 | handle_band_custom(wiphy, wiphy->bands[band], regd); |
bbcf3f02 | 1517 | bands_set++; |
b2e1b302 | 1518 | } |
bbcf3f02 LR |
1519 | |
1520 | /* | |
1521 | * no point in calling this if it won't have any effect | |
1a919318 | 1522 | * on your device's supported bands. |
bbcf3f02 LR |
1523 | */ |
1524 | WARN_ON(!bands_set); | |
b2e1b302 | 1525 | } |
1fa25e41 LR |
1526 | EXPORT_SYMBOL(wiphy_apply_custom_regulatory); |
1527 | ||
b2e253cf LR |
1528 | static void reg_set_request_processed(void) |
1529 | { | |
1530 | bool need_more_processing = false; | |
c492db37 | 1531 | struct regulatory_request *lr = get_last_request(); |
b2e253cf | 1532 | |
c492db37 | 1533 | lr->processed = true; |
b2e253cf LR |
1534 | |
1535 | spin_lock(®_requests_lock); | |
1536 | if (!list_empty(®_requests_list)) | |
1537 | need_more_processing = true; | |
1538 | spin_unlock(®_requests_lock); | |
1539 | ||
c492db37 | 1540 | if (lr->initiator == NL80211_REGDOM_SET_BY_USER) |
fe20b39e | 1541 | cancel_delayed_work(®_timeout); |
a90c7a31 | 1542 | |
b2e253cf LR |
1543 | if (need_more_processing) |
1544 | schedule_work(®_work); | |
1545 | } | |
1546 | ||
b3eb7f3f LR |
1547 | /** |
1548 | * reg_process_hint_core - process core regulatory requests | |
1549 | * @pending_request: a pending core regulatory request | |
1550 | * | |
1551 | * The wireless subsystem can use this function to process | |
1552 | * a regulatory request issued by the regulatory core. | |
1553 | * | |
1554 | * Returns one of the different reg request treatment values. | |
1555 | */ | |
1556 | static enum reg_request_treatment | |
1557 | reg_process_hint_core(struct regulatory_request *core_request) | |
1558 | { | |
b3eb7f3f LR |
1559 | |
1560 | core_request->intersect = false; | |
1561 | core_request->processed = false; | |
5ad6ef5e | 1562 | |
05f1a3ea | 1563 | reg_update_last_request(core_request); |
b3eb7f3f | 1564 | |
fe6631ff | 1565 | return reg_call_crda(core_request); |
b3eb7f3f LR |
1566 | } |
1567 | ||
0d97a619 LR |
1568 | static enum reg_request_treatment |
1569 | __reg_process_hint_user(struct regulatory_request *user_request) | |
1570 | { | |
1571 | struct regulatory_request *lr = get_last_request(); | |
1572 | ||
1573 | if (reg_request_cell_base(user_request)) | |
1574 | return reg_ignore_cell_hint(user_request); | |
1575 | ||
1576 | if (reg_request_cell_base(lr)) | |
1577 | return REG_REQ_IGNORE; | |
1578 | ||
1579 | if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) | |
1580 | return REG_REQ_INTERSECT; | |
1581 | /* | |
1582 | * If the user knows better the user should set the regdom | |
1583 | * to their country before the IE is picked up | |
1584 | */ | |
1585 | if (lr->initiator == NL80211_REGDOM_SET_BY_USER && | |
1586 | lr->intersect) | |
1587 | return REG_REQ_IGNORE; | |
1588 | /* | |
1589 | * Process user requests only after previous user/driver/core | |
1590 | * requests have been processed | |
1591 | */ | |
1592 | if ((lr->initiator == NL80211_REGDOM_SET_BY_CORE || | |
1593 | lr->initiator == NL80211_REGDOM_SET_BY_DRIVER || | |
1594 | lr->initiator == NL80211_REGDOM_SET_BY_USER) && | |
1595 | regdom_changes(lr->alpha2)) | |
1596 | return REG_REQ_IGNORE; | |
1597 | ||
1598 | if (!regdom_changes(user_request->alpha2)) | |
1599 | return REG_REQ_ALREADY_SET; | |
1600 | ||
1601 | return REG_REQ_OK; | |
1602 | } | |
1603 | ||
1604 | /** | |
1605 | * reg_process_hint_user - process user regulatory requests | |
1606 | * @user_request: a pending user regulatory request | |
1607 | * | |
1608 | * The wireless subsystem can use this function to process | |
1609 | * a regulatory request initiated by userspace. | |
1610 | * | |
1611 | * Returns one of the different reg request treatment values. | |
1612 | */ | |
1613 | static enum reg_request_treatment | |
1614 | reg_process_hint_user(struct regulatory_request *user_request) | |
1615 | { | |
1616 | enum reg_request_treatment treatment; | |
0d97a619 LR |
1617 | |
1618 | treatment = __reg_process_hint_user(user_request); | |
1619 | if (treatment == REG_REQ_IGNORE || | |
1620 | treatment == REG_REQ_ALREADY_SET) { | |
1621 | kfree(user_request); | |
1622 | return treatment; | |
1623 | } | |
1624 | ||
0d97a619 LR |
1625 | user_request->intersect = treatment == REG_REQ_INTERSECT; |
1626 | user_request->processed = false; | |
5ad6ef5e | 1627 | |
05f1a3ea | 1628 | reg_update_last_request(user_request); |
0d97a619 LR |
1629 | |
1630 | user_alpha2[0] = user_request->alpha2[0]; | |
1631 | user_alpha2[1] = user_request->alpha2[1]; | |
1632 | ||
fe6631ff | 1633 | return reg_call_crda(user_request); |
0d97a619 LR |
1634 | } |
1635 | ||
21636c7f LR |
1636 | static enum reg_request_treatment |
1637 | __reg_process_hint_driver(struct regulatory_request *driver_request) | |
1638 | { | |
1639 | struct regulatory_request *lr = get_last_request(); | |
1640 | ||
1641 | if (lr->initiator == NL80211_REGDOM_SET_BY_CORE) { | |
1642 | if (regdom_changes(driver_request->alpha2)) | |
1643 | return REG_REQ_OK; | |
1644 | return REG_REQ_ALREADY_SET; | |
1645 | } | |
1646 | ||
1647 | /* | |
1648 | * This would happen if you unplug and plug your card | |
1649 | * back in or if you add a new device for which the previously | |
1650 | * loaded card also agrees on the regulatory domain. | |
1651 | */ | |
1652 | if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER && | |
1653 | !regdom_changes(driver_request->alpha2)) | |
1654 | return REG_REQ_ALREADY_SET; | |
1655 | ||
1656 | return REG_REQ_INTERSECT; | |
1657 | } | |
1658 | ||
1659 | /** | |
1660 | * reg_process_hint_driver - process driver regulatory requests | |
1661 | * @driver_request: a pending driver regulatory request | |
1662 | * | |
1663 | * The wireless subsystem can use this function to process | |
1664 | * a regulatory request issued by an 802.11 driver. | |
1665 | * | |
1666 | * Returns one of the different reg request treatment values. | |
1667 | */ | |
1668 | static enum reg_request_treatment | |
1669 | reg_process_hint_driver(struct wiphy *wiphy, | |
1670 | struct regulatory_request *driver_request) | |
1671 | { | |
1672 | const struct ieee80211_regdomain *regd; | |
1673 | enum reg_request_treatment treatment; | |
21636c7f LR |
1674 | |
1675 | treatment = __reg_process_hint_driver(driver_request); | |
1676 | ||
1677 | switch (treatment) { | |
1678 | case REG_REQ_OK: | |
1679 | break; | |
1680 | case REG_REQ_IGNORE: | |
1681 | kfree(driver_request); | |
1682 | return treatment; | |
1683 | case REG_REQ_INTERSECT: | |
1684 | /* fall through */ | |
1685 | case REG_REQ_ALREADY_SET: | |
1686 | regd = reg_copy_regd(get_cfg80211_regdom()); | |
1687 | if (IS_ERR(regd)) { | |
1688 | kfree(driver_request); | |
1689 | return REG_REQ_IGNORE; | |
1690 | } | |
1691 | rcu_assign_pointer(wiphy->regd, regd); | |
1692 | } | |
1693 | ||
21636c7f LR |
1694 | |
1695 | driver_request->intersect = treatment == REG_REQ_INTERSECT; | |
1696 | driver_request->processed = false; | |
5ad6ef5e | 1697 | |
05f1a3ea | 1698 | reg_update_last_request(driver_request); |
21636c7f LR |
1699 | |
1700 | /* | |
1701 | * Since CRDA will not be called in this case as we already | |
1702 | * have applied the requested regulatory domain before we just | |
1703 | * inform userspace we have processed the request | |
1704 | */ | |
1705 | if (treatment == REG_REQ_ALREADY_SET) { | |
1706 | nl80211_send_reg_change_event(driver_request); | |
1707 | reg_set_request_processed(); | |
1708 | return treatment; | |
1709 | } | |
1710 | ||
fe6631ff | 1711 | return reg_call_crda(driver_request); |
21636c7f LR |
1712 | } |
1713 | ||
b23e7a9e LR |
1714 | static enum reg_request_treatment |
1715 | __reg_process_hint_country_ie(struct wiphy *wiphy, | |
1716 | struct regulatory_request *country_ie_request) | |
1717 | { | |
1718 | struct wiphy *last_wiphy = NULL; | |
1719 | struct regulatory_request *lr = get_last_request(); | |
1720 | ||
1721 | if (reg_request_cell_base(lr)) { | |
1722 | /* Trust a Cell base station over the AP's country IE */ | |
1723 | if (regdom_changes(country_ie_request->alpha2)) | |
1724 | return REG_REQ_IGNORE; | |
1725 | return REG_REQ_ALREADY_SET; | |
2a901468 LR |
1726 | } else { |
1727 | if (wiphy->regulatory_flags & REGULATORY_COUNTRY_IE_IGNORE) | |
1728 | return REG_REQ_IGNORE; | |
b23e7a9e LR |
1729 | } |
1730 | ||
b23e7a9e LR |
1731 | if (unlikely(!is_an_alpha2(country_ie_request->alpha2))) |
1732 | return -EINVAL; | |
2f1c6c57 LR |
1733 | |
1734 | if (lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE) | |
1735 | return REG_REQ_OK; | |
1736 | ||
1737 | last_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx); | |
1738 | ||
1739 | if (last_wiphy != wiphy) { | |
b23e7a9e | 1740 | /* |
2f1c6c57 LR |
1741 | * Two cards with two APs claiming different |
1742 | * Country IE alpha2s. We could | |
1743 | * intersect them, but that seems unlikely | |
1744 | * to be correct. Reject second one for now. | |
b23e7a9e | 1745 | */ |
2f1c6c57 LR |
1746 | if (regdom_changes(country_ie_request->alpha2)) |
1747 | return REG_REQ_IGNORE; | |
b23e7a9e LR |
1748 | return REG_REQ_ALREADY_SET; |
1749 | } | |
2f1c6c57 LR |
1750 | /* |
1751 | * Two consecutive Country IE hints on the same wiphy. | |
1752 | * This should be picked up early by the driver/stack | |
1753 | */ | |
1754 | if (WARN_ON(regdom_changes(country_ie_request->alpha2))) | |
1755 | return REG_REQ_OK; | |
1756 | return REG_REQ_ALREADY_SET; | |
b23e7a9e LR |
1757 | } |
1758 | ||
d1c96a9a | 1759 | /** |
b23e7a9e LR |
1760 | * reg_process_hint_country_ie - process regulatory requests from country IEs |
1761 | * @country_ie_request: a regulatory request from a country IE | |
d1c96a9a | 1762 | * |
b23e7a9e LR |
1763 | * The wireless subsystem can use this function to process |
1764 | * a regulatory request issued by a country Information Element. | |
d1c96a9a | 1765 | * |
2f92212b | 1766 | * Returns one of the different reg request treatment values. |
d1c96a9a | 1767 | */ |
2f92212b | 1768 | static enum reg_request_treatment |
b23e7a9e LR |
1769 | reg_process_hint_country_ie(struct wiphy *wiphy, |
1770 | struct regulatory_request *country_ie_request) | |
b2e1b302 | 1771 | { |
2f92212b | 1772 | enum reg_request_treatment treatment; |
761cf7ec | 1773 | |
b23e7a9e | 1774 | treatment = __reg_process_hint_country_ie(wiphy, country_ie_request); |
9c96477d | 1775 | |
2f92212b | 1776 | switch (treatment) { |
2f92212b JB |
1777 | case REG_REQ_OK: |
1778 | break; | |
b23e7a9e LR |
1779 | case REG_REQ_IGNORE: |
1780 | /* fall through */ | |
1781 | case REG_REQ_ALREADY_SET: | |
1782 | kfree(country_ie_request); | |
1783 | return treatment; | |
1784 | case REG_REQ_INTERSECT: | |
1785 | kfree(country_ie_request); | |
fb1fc7ad | 1786 | /* |
b23e7a9e LR |
1787 | * This doesn't happen yet, not sure we |
1788 | * ever want to support it for this case. | |
fb1fc7ad | 1789 | */ |
b23e7a9e LR |
1790 | WARN_ONCE(1, "Unexpected intersection for country IEs"); |
1791 | return REG_REQ_IGNORE; | |
3e0c3ff3 | 1792 | } |
b2e1b302 | 1793 | |
b23e7a9e LR |
1794 | country_ie_request->intersect = false; |
1795 | country_ie_request->processed = false; | |
5ad6ef5e | 1796 | |
05f1a3ea | 1797 | reg_update_last_request(country_ie_request); |
3e0c3ff3 | 1798 | |
fe6631ff | 1799 | return reg_call_crda(country_ie_request); |
b2e1b302 LR |
1800 | } |
1801 | ||
30a548c7 | 1802 | /* This processes *all* regulatory hints */ |
1daa37c7 | 1803 | static void reg_process_hint(struct regulatory_request *reg_request) |
fe33eb39 | 1804 | { |
fe33eb39 | 1805 | struct wiphy *wiphy = NULL; |
b3eb7f3f | 1806 | enum reg_request_treatment treatment; |
fe33eb39 | 1807 | |
f4173766 | 1808 | if (reg_request->wiphy_idx != WIPHY_IDX_INVALID) |
fe33eb39 LR |
1809 | wiphy = wiphy_idx_to_wiphy(reg_request->wiphy_idx); |
1810 | ||
b3eb7f3f LR |
1811 | switch (reg_request->initiator) { |
1812 | case NL80211_REGDOM_SET_BY_CORE: | |
1813 | reg_process_hint_core(reg_request); | |
1814 | return; | |
1815 | case NL80211_REGDOM_SET_BY_USER: | |
0d97a619 | 1816 | treatment = reg_process_hint_user(reg_request); |
50c11eb9 | 1817 | if (treatment == REG_REQ_IGNORE || |
0d97a619 LR |
1818 | treatment == REG_REQ_ALREADY_SET) |
1819 | return; | |
845f3351 SD |
1820 | queue_delayed_work(system_power_efficient_wq, |
1821 | ®_timeout, msecs_to_jiffies(3142)); | |
0d97a619 | 1822 | return; |
b3eb7f3f | 1823 | case NL80211_REGDOM_SET_BY_DRIVER: |
772f0389 IP |
1824 | if (!wiphy) |
1825 | goto out_free; | |
21636c7f LR |
1826 | treatment = reg_process_hint_driver(wiphy, reg_request); |
1827 | break; | |
b3eb7f3f | 1828 | case NL80211_REGDOM_SET_BY_COUNTRY_IE: |
772f0389 IP |
1829 | if (!wiphy) |
1830 | goto out_free; | |
b23e7a9e | 1831 | treatment = reg_process_hint_country_ie(wiphy, reg_request); |
b3eb7f3f LR |
1832 | break; |
1833 | default: | |
1834 | WARN(1, "invalid initiator %d\n", reg_request->initiator); | |
772f0389 | 1835 | goto out_free; |
b3eb7f3f LR |
1836 | } |
1837 | ||
b23e7a9e LR |
1838 | /* This is required so that the orig_* parameters are saved */ |
1839 | if (treatment == REG_REQ_ALREADY_SET && wiphy && | |
a2f73b6c | 1840 | wiphy->regulatory_flags & REGULATORY_STRICT_REG) |
b23e7a9e | 1841 | wiphy_update_regulatory(wiphy, reg_request->initiator); |
772f0389 IP |
1842 | |
1843 | return; | |
1844 | ||
1845 | out_free: | |
1846 | kfree(reg_request); | |
fe33eb39 LR |
1847 | } |
1848 | ||
b2e253cf LR |
1849 | /* |
1850 | * Processes regulatory hints, this is all the NL80211_REGDOM_SET_BY_* | |
1851 | * Regulatory hints come on a first come first serve basis and we | |
1852 | * must process each one atomically. | |
1853 | */ | |
fe33eb39 | 1854 | static void reg_process_pending_hints(void) |
b0e2880b | 1855 | { |
c492db37 | 1856 | struct regulatory_request *reg_request, *lr; |
fe33eb39 | 1857 | |
c492db37 | 1858 | lr = get_last_request(); |
b0e2880b | 1859 | |
b2e253cf | 1860 | /* When last_request->processed becomes true this will be rescheduled */ |
c492db37 | 1861 | if (lr && !lr->processed) { |
1a919318 | 1862 | REG_DBG_PRINT("Pending regulatory request, waiting for it to be processed...\n"); |
5fe231e8 | 1863 | return; |
b2e253cf LR |
1864 | } |
1865 | ||
fe33eb39 | 1866 | spin_lock(®_requests_lock); |
fe33eb39 | 1867 | |
b2e253cf | 1868 | if (list_empty(®_requests_list)) { |
d951c1dd | 1869 | spin_unlock(®_requests_lock); |
5fe231e8 | 1870 | return; |
fe33eb39 | 1871 | } |
b2e253cf LR |
1872 | |
1873 | reg_request = list_first_entry(®_requests_list, | |
1874 | struct regulatory_request, | |
1875 | list); | |
1876 | list_del_init(®_request->list); | |
1877 | ||
fe33eb39 | 1878 | spin_unlock(®_requests_lock); |
b0e2880b | 1879 | |
1daa37c7 | 1880 | reg_process_hint(reg_request); |
fe33eb39 LR |
1881 | } |
1882 | ||
e38f8a7a LR |
1883 | /* Processes beacon hints -- this has nothing to do with country IEs */ |
1884 | static void reg_process_pending_beacon_hints(void) | |
1885 | { | |
79c97e97 | 1886 | struct cfg80211_registered_device *rdev; |
e38f8a7a LR |
1887 | struct reg_beacon *pending_beacon, *tmp; |
1888 | ||
e38f8a7a LR |
1889 | /* This goes through the _pending_ beacon list */ |
1890 | spin_lock_bh(®_pending_beacons_lock); | |
1891 | ||
e38f8a7a LR |
1892 | list_for_each_entry_safe(pending_beacon, tmp, |
1893 | ®_pending_beacons, list) { | |
e38f8a7a LR |
1894 | list_del_init(&pending_beacon->list); |
1895 | ||
1896 | /* Applies the beacon hint to current wiphys */ | |
79c97e97 JB |
1897 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) |
1898 | wiphy_update_new_beacon(&rdev->wiphy, pending_beacon); | |
e38f8a7a LR |
1899 | |
1900 | /* Remembers the beacon hint for new wiphys or reg changes */ | |
1901 | list_add_tail(&pending_beacon->list, ®_beacon_list); | |
1902 | } | |
1903 | ||
1904 | spin_unlock_bh(®_pending_beacons_lock); | |
e38f8a7a LR |
1905 | } |
1906 | ||
fe33eb39 LR |
1907 | static void reg_todo(struct work_struct *work) |
1908 | { | |
5fe231e8 | 1909 | rtnl_lock(); |
fe33eb39 | 1910 | reg_process_pending_hints(); |
e38f8a7a | 1911 | reg_process_pending_beacon_hints(); |
5fe231e8 | 1912 | rtnl_unlock(); |
fe33eb39 LR |
1913 | } |
1914 | ||
fe33eb39 LR |
1915 | static void queue_regulatory_request(struct regulatory_request *request) |
1916 | { | |
d4f2c881 JB |
1917 | request->alpha2[0] = toupper(request->alpha2[0]); |
1918 | request->alpha2[1] = toupper(request->alpha2[1]); | |
c61029c7 | 1919 | |
fe33eb39 LR |
1920 | spin_lock(®_requests_lock); |
1921 | list_add_tail(&request->list, ®_requests_list); | |
1922 | spin_unlock(®_requests_lock); | |
1923 | ||
1924 | schedule_work(®_work); | |
1925 | } | |
1926 | ||
09d989d1 LR |
1927 | /* |
1928 | * Core regulatory hint -- happens during cfg80211_init() | |
1929 | * and when we restore regulatory settings. | |
1930 | */ | |
ba25c141 LR |
1931 | static int regulatory_hint_core(const char *alpha2) |
1932 | { | |
1933 | struct regulatory_request *request; | |
1934 | ||
1a919318 | 1935 | request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); |
ba25c141 LR |
1936 | if (!request) |
1937 | return -ENOMEM; | |
1938 | ||
1939 | request->alpha2[0] = alpha2[0]; | |
1940 | request->alpha2[1] = alpha2[1]; | |
7db90f4a | 1941 | request->initiator = NL80211_REGDOM_SET_BY_CORE; |
ba25c141 | 1942 | |
31e99729 | 1943 | queue_regulatory_request(request); |
5078b2e3 | 1944 | |
fe33eb39 | 1945 | return 0; |
ba25c141 LR |
1946 | } |
1947 | ||
fe33eb39 | 1948 | /* User hints */ |
57b5ce07 LR |
1949 | int regulatory_hint_user(const char *alpha2, |
1950 | enum nl80211_user_reg_hint_type user_reg_hint_type) | |
b2e1b302 | 1951 | { |
fe33eb39 LR |
1952 | struct regulatory_request *request; |
1953 | ||
fdc9d7b2 JB |
1954 | if (WARN_ON(!alpha2)) |
1955 | return -EINVAL; | |
b2e1b302 | 1956 | |
fe33eb39 LR |
1957 | request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); |
1958 | if (!request) | |
1959 | return -ENOMEM; | |
1960 | ||
f4173766 | 1961 | request->wiphy_idx = WIPHY_IDX_INVALID; |
fe33eb39 LR |
1962 | request->alpha2[0] = alpha2[0]; |
1963 | request->alpha2[1] = alpha2[1]; | |
e12822e1 | 1964 | request->initiator = NL80211_REGDOM_SET_BY_USER; |
57b5ce07 | 1965 | request->user_reg_hint_type = user_reg_hint_type; |
fe33eb39 LR |
1966 | |
1967 | queue_regulatory_request(request); | |
1968 | ||
1969 | return 0; | |
1970 | } | |
1971 | ||
1972 | /* Driver hints */ | |
1973 | int regulatory_hint(struct wiphy *wiphy, const char *alpha2) | |
1974 | { | |
1975 | struct regulatory_request *request; | |
1976 | ||
fdc9d7b2 JB |
1977 | if (WARN_ON(!alpha2 || !wiphy)) |
1978 | return -EINVAL; | |
fe33eb39 | 1979 | |
4f7b9140 LR |
1980 | wiphy->regulatory_flags &= ~REGULATORY_CUSTOM_REG; |
1981 | ||
fe33eb39 LR |
1982 | request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); |
1983 | if (!request) | |
1984 | return -ENOMEM; | |
1985 | ||
1986 | request->wiphy_idx = get_wiphy_idx(wiphy); | |
1987 | ||
fe33eb39 LR |
1988 | request->alpha2[0] = alpha2[0]; |
1989 | request->alpha2[1] = alpha2[1]; | |
7db90f4a | 1990 | request->initiator = NL80211_REGDOM_SET_BY_DRIVER; |
fe33eb39 LR |
1991 | |
1992 | queue_regulatory_request(request); | |
1993 | ||
1994 | return 0; | |
b2e1b302 LR |
1995 | } |
1996 | EXPORT_SYMBOL(regulatory_hint); | |
1997 | ||
789fd033 LR |
1998 | void regulatory_hint_country_ie(struct wiphy *wiphy, enum ieee80211_band band, |
1999 | const u8 *country_ie, u8 country_ie_len) | |
3f2355cb | 2000 | { |
3f2355cb | 2001 | char alpha2[2]; |
3f2355cb | 2002 | enum environment_cap env = ENVIRON_ANY; |
db2424c5 | 2003 | struct regulatory_request *request = NULL, *lr; |
d335fe63 | 2004 | |
3f2355cb LR |
2005 | /* IE len must be evenly divisible by 2 */ |
2006 | if (country_ie_len & 0x01) | |
db2424c5 | 2007 | return; |
3f2355cb LR |
2008 | |
2009 | if (country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN) | |
db2424c5 JB |
2010 | return; |
2011 | ||
2012 | request = kzalloc(sizeof(*request), GFP_KERNEL); | |
2013 | if (!request) | |
2014 | return; | |
3f2355cb | 2015 | |
3f2355cb LR |
2016 | alpha2[0] = country_ie[0]; |
2017 | alpha2[1] = country_ie[1]; | |
2018 | ||
2019 | if (country_ie[2] == 'I') | |
2020 | env = ENVIRON_INDOOR; | |
2021 | else if (country_ie[2] == 'O') | |
2022 | env = ENVIRON_OUTDOOR; | |
2023 | ||
db2424c5 JB |
2024 | rcu_read_lock(); |
2025 | lr = get_last_request(); | |
2026 | ||
2027 | if (unlikely(!lr)) | |
2028 | goto out; | |
2029 | ||
fb1fc7ad | 2030 | /* |
8b19e6ca | 2031 | * We will run this only upon a successful connection on cfg80211. |
4b44c8bc | 2032 | * We leave conflict resolution to the workqueue, where can hold |
5fe231e8 | 2033 | * the RTNL. |
fb1fc7ad | 2034 | */ |
c492db37 JB |
2035 | if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE && |
2036 | lr->wiphy_idx != WIPHY_IDX_INVALID) | |
4b44c8bc | 2037 | goto out; |
3f2355cb | 2038 | |
fe33eb39 | 2039 | request->wiphy_idx = get_wiphy_idx(wiphy); |
4f366c5d JL |
2040 | request->alpha2[0] = alpha2[0]; |
2041 | request->alpha2[1] = alpha2[1]; | |
7db90f4a | 2042 | request->initiator = NL80211_REGDOM_SET_BY_COUNTRY_IE; |
fe33eb39 LR |
2043 | request->country_ie_env = env; |
2044 | ||
fe33eb39 | 2045 | queue_regulatory_request(request); |
db2424c5 | 2046 | request = NULL; |
3f2355cb | 2047 | out: |
db2424c5 JB |
2048 | kfree(request); |
2049 | rcu_read_unlock(); | |
3f2355cb | 2050 | } |
b2e1b302 | 2051 | |
09d989d1 LR |
2052 | static void restore_alpha2(char *alpha2, bool reset_user) |
2053 | { | |
2054 | /* indicates there is no alpha2 to consider for restoration */ | |
2055 | alpha2[0] = '9'; | |
2056 | alpha2[1] = '7'; | |
2057 | ||
2058 | /* The user setting has precedence over the module parameter */ | |
2059 | if (is_user_regdom_saved()) { | |
2060 | /* Unless we're asked to ignore it and reset it */ | |
2061 | if (reset_user) { | |
1a919318 | 2062 | REG_DBG_PRINT("Restoring regulatory settings including user preference\n"); |
09d989d1 LR |
2063 | user_alpha2[0] = '9'; |
2064 | user_alpha2[1] = '7'; | |
2065 | ||
2066 | /* | |
2067 | * If we're ignoring user settings, we still need to | |
2068 | * check the module parameter to ensure we put things | |
2069 | * back as they were for a full restore. | |
2070 | */ | |
2071 | if (!is_world_regdom(ieee80211_regdom)) { | |
1a919318 JB |
2072 | REG_DBG_PRINT("Keeping preference on module parameter ieee80211_regdom: %c%c\n", |
2073 | ieee80211_regdom[0], ieee80211_regdom[1]); | |
09d989d1 LR |
2074 | alpha2[0] = ieee80211_regdom[0]; |
2075 | alpha2[1] = ieee80211_regdom[1]; | |
2076 | } | |
2077 | } else { | |
1a919318 JB |
2078 | REG_DBG_PRINT("Restoring regulatory settings while preserving user preference for: %c%c\n", |
2079 | user_alpha2[0], user_alpha2[1]); | |
09d989d1 LR |
2080 | alpha2[0] = user_alpha2[0]; |
2081 | alpha2[1] = user_alpha2[1]; | |
2082 | } | |
2083 | } else if (!is_world_regdom(ieee80211_regdom)) { | |
1a919318 JB |
2084 | REG_DBG_PRINT("Keeping preference on module parameter ieee80211_regdom: %c%c\n", |
2085 | ieee80211_regdom[0], ieee80211_regdom[1]); | |
09d989d1 LR |
2086 | alpha2[0] = ieee80211_regdom[0]; |
2087 | alpha2[1] = ieee80211_regdom[1]; | |
2088 | } else | |
d91e41b6 | 2089 | REG_DBG_PRINT("Restoring regulatory settings\n"); |
09d989d1 LR |
2090 | } |
2091 | ||
5ce543d1 RM |
2092 | static void restore_custom_reg_settings(struct wiphy *wiphy) |
2093 | { | |
2094 | struct ieee80211_supported_band *sband; | |
2095 | enum ieee80211_band band; | |
2096 | struct ieee80211_channel *chan; | |
2097 | int i; | |
2098 | ||
2099 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) { | |
2100 | sband = wiphy->bands[band]; | |
2101 | if (!sband) | |
2102 | continue; | |
2103 | for (i = 0; i < sband->n_channels; i++) { | |
2104 | chan = &sband->channels[i]; | |
2105 | chan->flags = chan->orig_flags; | |
2106 | chan->max_antenna_gain = chan->orig_mag; | |
2107 | chan->max_power = chan->orig_mpwr; | |
899852af | 2108 | chan->beacon_found = false; |
5ce543d1 RM |
2109 | } |
2110 | } | |
2111 | } | |
2112 | ||
09d989d1 LR |
2113 | /* |
2114 | * Restoring regulatory settings involves ingoring any | |
2115 | * possibly stale country IE information and user regulatory | |
2116 | * settings if so desired, this includes any beacon hints | |
2117 | * learned as we could have traveled outside to another country | |
2118 | * after disconnection. To restore regulatory settings we do | |
2119 | * exactly what we did at bootup: | |
2120 | * | |
2121 | * - send a core regulatory hint | |
2122 | * - send a user regulatory hint if applicable | |
2123 | * | |
2124 | * Device drivers that send a regulatory hint for a specific country | |
2125 | * keep their own regulatory domain on wiphy->regd so that does does | |
2126 | * not need to be remembered. | |
2127 | */ | |
2128 | static void restore_regulatory_settings(bool reset_user) | |
2129 | { | |
2130 | char alpha2[2]; | |
cee0bec5 | 2131 | char world_alpha2[2]; |
09d989d1 | 2132 | struct reg_beacon *reg_beacon, *btmp; |
14609555 LR |
2133 | struct regulatory_request *reg_request, *tmp; |
2134 | LIST_HEAD(tmp_reg_req_list); | |
5ce543d1 | 2135 | struct cfg80211_registered_device *rdev; |
09d989d1 | 2136 | |
5fe231e8 JB |
2137 | ASSERT_RTNL(); |
2138 | ||
2d319867 | 2139 | reset_regdomains(true, &world_regdom); |
09d989d1 LR |
2140 | restore_alpha2(alpha2, reset_user); |
2141 | ||
14609555 LR |
2142 | /* |
2143 | * If there's any pending requests we simply | |
2144 | * stash them to a temporary pending queue and | |
2145 | * add then after we've restored regulatory | |
2146 | * settings. | |
2147 | */ | |
2148 | spin_lock(®_requests_lock); | |
fea9bced JB |
2149 | list_for_each_entry_safe(reg_request, tmp, ®_requests_list, list) { |
2150 | if (reg_request->initiator != NL80211_REGDOM_SET_BY_USER) | |
2151 | continue; | |
2152 | list_move_tail(®_request->list, &tmp_reg_req_list); | |
14609555 LR |
2153 | } |
2154 | spin_unlock(®_requests_lock); | |
2155 | ||
09d989d1 LR |
2156 | /* Clear beacon hints */ |
2157 | spin_lock_bh(®_pending_beacons_lock); | |
fea9bced JB |
2158 | list_for_each_entry_safe(reg_beacon, btmp, ®_pending_beacons, list) { |
2159 | list_del(®_beacon->list); | |
2160 | kfree(reg_beacon); | |
09d989d1 LR |
2161 | } |
2162 | spin_unlock_bh(®_pending_beacons_lock); | |
2163 | ||
fea9bced JB |
2164 | list_for_each_entry_safe(reg_beacon, btmp, ®_beacon_list, list) { |
2165 | list_del(®_beacon->list); | |
2166 | kfree(reg_beacon); | |
09d989d1 LR |
2167 | } |
2168 | ||
2169 | /* First restore to the basic regulatory settings */ | |
379b82f4 JB |
2170 | world_alpha2[0] = cfg80211_world_regdom->alpha2[0]; |
2171 | world_alpha2[1] = cfg80211_world_regdom->alpha2[1]; | |
09d989d1 | 2172 | |
5ce543d1 | 2173 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) { |
a2f73b6c | 2174 | if (rdev->wiphy.regulatory_flags & REGULATORY_CUSTOM_REG) |
5ce543d1 RM |
2175 | restore_custom_reg_settings(&rdev->wiphy); |
2176 | } | |
2177 | ||
cee0bec5 | 2178 | regulatory_hint_core(world_alpha2); |
09d989d1 LR |
2179 | |
2180 | /* | |
2181 | * This restores the ieee80211_regdom module parameter | |
2182 | * preference or the last user requested regulatory | |
2183 | * settings, user regulatory settings takes precedence. | |
2184 | */ | |
2185 | if (is_an_alpha2(alpha2)) | |
57b5ce07 | 2186 | regulatory_hint_user(user_alpha2, NL80211_USER_REG_HINT_USER); |
09d989d1 | 2187 | |
14609555 | 2188 | spin_lock(®_requests_lock); |
11cff96c | 2189 | list_splice_tail_init(&tmp_reg_req_list, ®_requests_list); |
14609555 LR |
2190 | spin_unlock(®_requests_lock); |
2191 | ||
14609555 LR |
2192 | REG_DBG_PRINT("Kicking the queue\n"); |
2193 | ||
2194 | schedule_work(®_work); | |
2195 | } | |
09d989d1 LR |
2196 | |
2197 | void regulatory_hint_disconnect(void) | |
2198 | { | |
1a919318 | 2199 | REG_DBG_PRINT("All devices are disconnected, going to restore regulatory settings\n"); |
09d989d1 LR |
2200 | restore_regulatory_settings(false); |
2201 | } | |
2202 | ||
e38f8a7a LR |
2203 | static bool freq_is_chan_12_13_14(u16 freq) |
2204 | { | |
59eb21a6 BR |
2205 | if (freq == ieee80211_channel_to_frequency(12, IEEE80211_BAND_2GHZ) || |
2206 | freq == ieee80211_channel_to_frequency(13, IEEE80211_BAND_2GHZ) || | |
2207 | freq == ieee80211_channel_to_frequency(14, IEEE80211_BAND_2GHZ)) | |
e38f8a7a LR |
2208 | return true; |
2209 | return false; | |
2210 | } | |
2211 | ||
3ebfa6e7 LR |
2212 | static bool pending_reg_beacon(struct ieee80211_channel *beacon_chan) |
2213 | { | |
2214 | struct reg_beacon *pending_beacon; | |
2215 | ||
2216 | list_for_each_entry(pending_beacon, ®_pending_beacons, list) | |
2217 | if (beacon_chan->center_freq == | |
2218 | pending_beacon->chan.center_freq) | |
2219 | return true; | |
2220 | return false; | |
2221 | } | |
2222 | ||
e38f8a7a LR |
2223 | int regulatory_hint_found_beacon(struct wiphy *wiphy, |
2224 | struct ieee80211_channel *beacon_chan, | |
2225 | gfp_t gfp) | |
2226 | { | |
2227 | struct reg_beacon *reg_beacon; | |
3ebfa6e7 | 2228 | bool processing; |
e38f8a7a | 2229 | |
1a919318 JB |
2230 | if (beacon_chan->beacon_found || |
2231 | beacon_chan->flags & IEEE80211_CHAN_RADAR || | |
e38f8a7a | 2232 | (beacon_chan->band == IEEE80211_BAND_2GHZ && |
1a919318 | 2233 | !freq_is_chan_12_13_14(beacon_chan->center_freq))) |
e38f8a7a LR |
2234 | return 0; |
2235 | ||
3ebfa6e7 LR |
2236 | spin_lock_bh(®_pending_beacons_lock); |
2237 | processing = pending_reg_beacon(beacon_chan); | |
2238 | spin_unlock_bh(®_pending_beacons_lock); | |
2239 | ||
2240 | if (processing) | |
e38f8a7a LR |
2241 | return 0; |
2242 | ||
2243 | reg_beacon = kzalloc(sizeof(struct reg_beacon), gfp); | |
2244 | if (!reg_beacon) | |
2245 | return -ENOMEM; | |
2246 | ||
1a919318 | 2247 | REG_DBG_PRINT("Found new beacon on frequency: %d MHz (Ch %d) on %s\n", |
4113f751 LR |
2248 | beacon_chan->center_freq, |
2249 | ieee80211_frequency_to_channel(beacon_chan->center_freq), | |
2250 | wiphy_name(wiphy)); | |
2251 | ||
e38f8a7a | 2252 | memcpy(®_beacon->chan, beacon_chan, |
1a919318 | 2253 | sizeof(struct ieee80211_channel)); |
e38f8a7a LR |
2254 | |
2255 | /* | |
2256 | * Since we can be called from BH or and non-BH context | |
2257 | * we must use spin_lock_bh() | |
2258 | */ | |
2259 | spin_lock_bh(®_pending_beacons_lock); | |
2260 | list_add_tail(®_beacon->list, ®_pending_beacons); | |
2261 | spin_unlock_bh(®_pending_beacons_lock); | |
2262 | ||
2263 | schedule_work(®_work); | |
2264 | ||
2265 | return 0; | |
2266 | } | |
2267 | ||
a3d2eaf0 | 2268 | static void print_rd_rules(const struct ieee80211_regdomain *rd) |
b2e1b302 LR |
2269 | { |
2270 | unsigned int i; | |
a3d2eaf0 JB |
2271 | const struct ieee80211_reg_rule *reg_rule = NULL; |
2272 | const struct ieee80211_freq_range *freq_range = NULL; | |
2273 | const struct ieee80211_power_rule *power_rule = NULL; | |
089027e5 | 2274 | char bw[32], cac_time[32]; |
b2e1b302 | 2275 | |
089027e5 | 2276 | pr_info(" (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp), (dfs_cac_time)\n"); |
b2e1b302 LR |
2277 | |
2278 | for (i = 0; i < rd->n_reg_rules; i++) { | |
2279 | reg_rule = &rd->reg_rules[i]; | |
2280 | freq_range = ®_rule->freq_range; | |
2281 | power_rule = ®_rule->power_rule; | |
2282 | ||
b0dfd2ea JD |
2283 | if (reg_rule->flags & NL80211_RRF_AUTO_BW) |
2284 | snprintf(bw, sizeof(bw), "%d KHz, %d KHz AUTO", | |
2285 | freq_range->max_bandwidth_khz, | |
97524820 JD |
2286 | reg_get_max_bandwidth(rd, reg_rule)); |
2287 | else | |
b0dfd2ea | 2288 | snprintf(bw, sizeof(bw), "%d KHz", |
97524820 JD |
2289 | freq_range->max_bandwidth_khz); |
2290 | ||
089027e5 JD |
2291 | if (reg_rule->flags & NL80211_RRF_DFS) |
2292 | scnprintf(cac_time, sizeof(cac_time), "%u s", | |
2293 | reg_rule->dfs_cac_ms/1000); | |
2294 | else | |
2295 | scnprintf(cac_time, sizeof(cac_time), "N/A"); | |
2296 | ||
2297 | ||
fb1fc7ad LR |
2298 | /* |
2299 | * There may not be documentation for max antenna gain | |
2300 | * in certain regions | |
2301 | */ | |
b2e1b302 | 2302 | if (power_rule->max_antenna_gain) |
089027e5 | 2303 | pr_info(" (%d KHz - %d KHz @ %s), (%d mBi, %d mBm), (%s)\n", |
b2e1b302 LR |
2304 | freq_range->start_freq_khz, |
2305 | freq_range->end_freq_khz, | |
97524820 | 2306 | bw, |
b2e1b302 | 2307 | power_rule->max_antenna_gain, |
089027e5 JD |
2308 | power_rule->max_eirp, |
2309 | cac_time); | |
b2e1b302 | 2310 | else |
089027e5 | 2311 | pr_info(" (%d KHz - %d KHz @ %s), (N/A, %d mBm), (%s)\n", |
b2e1b302 LR |
2312 | freq_range->start_freq_khz, |
2313 | freq_range->end_freq_khz, | |
97524820 | 2314 | bw, |
089027e5 JD |
2315 | power_rule->max_eirp, |
2316 | cac_time); | |
b2e1b302 LR |
2317 | } |
2318 | } | |
2319 | ||
4c7d3982 | 2320 | bool reg_supported_dfs_region(enum nl80211_dfs_regions dfs_region) |
8b60b078 LR |
2321 | { |
2322 | switch (dfs_region) { | |
2323 | case NL80211_DFS_UNSET: | |
2324 | case NL80211_DFS_FCC: | |
2325 | case NL80211_DFS_ETSI: | |
2326 | case NL80211_DFS_JP: | |
2327 | return true; | |
2328 | default: | |
2329 | REG_DBG_PRINT("Ignoring uknown DFS master region: %d\n", | |
2330 | dfs_region); | |
2331 | return false; | |
2332 | } | |
2333 | } | |
2334 | ||
a3d2eaf0 | 2335 | static void print_regdomain(const struct ieee80211_regdomain *rd) |
b2e1b302 | 2336 | { |
c492db37 | 2337 | struct regulatory_request *lr = get_last_request(); |
b2e1b302 | 2338 | |
3f2355cb | 2339 | if (is_intersected_alpha2(rd->alpha2)) { |
c492db37 | 2340 | if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) { |
79c97e97 | 2341 | struct cfg80211_registered_device *rdev; |
c492db37 | 2342 | rdev = cfg80211_rdev_by_wiphy_idx(lr->wiphy_idx); |
79c97e97 | 2343 | if (rdev) { |
e9c0268f | 2344 | pr_info("Current regulatory domain updated by AP to: %c%c\n", |
79c97e97 JB |
2345 | rdev->country_ie_alpha2[0], |
2346 | rdev->country_ie_alpha2[1]); | |
3f2355cb | 2347 | } else |
e9c0268f | 2348 | pr_info("Current regulatory domain intersected:\n"); |
3f2355cb | 2349 | } else |
e9c0268f | 2350 | pr_info("Current regulatory domain intersected:\n"); |
1a919318 | 2351 | } else if (is_world_regdom(rd->alpha2)) { |
e9c0268f | 2352 | pr_info("World regulatory domain updated:\n"); |
1a919318 | 2353 | } else { |
b2e1b302 | 2354 | if (is_unknown_alpha2(rd->alpha2)) |
e9c0268f | 2355 | pr_info("Regulatory domain changed to driver built-in settings (unknown country)\n"); |
57b5ce07 | 2356 | else { |
c492db37 | 2357 | if (reg_request_cell_base(lr)) |
1a919318 | 2358 | pr_info("Regulatory domain changed to country: %c%c by Cell Station\n", |
57b5ce07 LR |
2359 | rd->alpha2[0], rd->alpha2[1]); |
2360 | else | |
1a919318 | 2361 | pr_info("Regulatory domain changed to country: %c%c\n", |
57b5ce07 LR |
2362 | rd->alpha2[0], rd->alpha2[1]); |
2363 | } | |
b2e1b302 | 2364 | } |
1a919318 | 2365 | |
3ef121b5 | 2366 | pr_info(" DFS Master region: %s", reg_dfs_region_str(rd->dfs_region)); |
b2e1b302 LR |
2367 | print_rd_rules(rd); |
2368 | } | |
2369 | ||
2df78167 | 2370 | static void print_regdomain_info(const struct ieee80211_regdomain *rd) |
b2e1b302 | 2371 | { |
e9c0268f | 2372 | pr_info("Regulatory domain: %c%c\n", rd->alpha2[0], rd->alpha2[1]); |
b2e1b302 LR |
2373 | print_rd_rules(rd); |
2374 | } | |
2375 | ||
3b9e5aca LR |
2376 | static int reg_set_rd_core(const struct ieee80211_regdomain *rd) |
2377 | { | |
2378 | if (!is_world_regdom(rd->alpha2)) | |
2379 | return -EINVAL; | |
2380 | update_world_regdomain(rd); | |
2381 | return 0; | |
2382 | } | |
2383 | ||
84721d44 LR |
2384 | static int reg_set_rd_user(const struct ieee80211_regdomain *rd, |
2385 | struct regulatory_request *user_request) | |
2386 | { | |
2387 | const struct ieee80211_regdomain *intersected_rd = NULL; | |
2388 | ||
84721d44 LR |
2389 | if (!regdom_changes(rd->alpha2)) |
2390 | return -EALREADY; | |
2391 | ||
2392 | if (!is_valid_rd(rd)) { | |
2393 | pr_err("Invalid regulatory domain detected:\n"); | |
2394 | print_regdomain_info(rd); | |
2395 | return -EINVAL; | |
2396 | } | |
2397 | ||
2398 | if (!user_request->intersect) { | |
2399 | reset_regdomains(false, rd); | |
2400 | return 0; | |
2401 | } | |
2402 | ||
2403 | intersected_rd = regdom_intersect(rd, get_cfg80211_regdom()); | |
2404 | if (!intersected_rd) | |
2405 | return -EINVAL; | |
2406 | ||
2407 | kfree(rd); | |
2408 | rd = NULL; | |
2409 | reset_regdomains(false, intersected_rd); | |
2410 | ||
2411 | return 0; | |
2412 | } | |
2413 | ||
f5fe3247 LR |
2414 | static int reg_set_rd_driver(const struct ieee80211_regdomain *rd, |
2415 | struct regulatory_request *driver_request) | |
b2e1b302 | 2416 | { |
e9763c3c | 2417 | const struct ieee80211_regdomain *regd; |
9c96477d | 2418 | const struct ieee80211_regdomain *intersected_rd = NULL; |
f5fe3247 | 2419 | const struct ieee80211_regdomain *tmp; |
806a9e39 | 2420 | struct wiphy *request_wiphy; |
6913b49a | 2421 | |
f5fe3247 | 2422 | if (is_world_regdom(rd->alpha2)) |
b2e1b302 LR |
2423 | return -EINVAL; |
2424 | ||
f5fe3247 LR |
2425 | if (!regdom_changes(rd->alpha2)) |
2426 | return -EALREADY; | |
b2e1b302 | 2427 | |
8375af3b | 2428 | if (!is_valid_rd(rd)) { |
e9c0268f | 2429 | pr_err("Invalid regulatory domain detected:\n"); |
8375af3b LR |
2430 | print_regdomain_info(rd); |
2431 | return -EINVAL; | |
b2e1b302 LR |
2432 | } |
2433 | ||
f5fe3247 LR |
2434 | request_wiphy = wiphy_idx_to_wiphy(driver_request->wiphy_idx); |
2435 | if (!request_wiphy) { | |
845f3351 SD |
2436 | queue_delayed_work(system_power_efficient_wq, |
2437 | ®_timeout, 0); | |
de3584bd JB |
2438 | return -ENODEV; |
2439 | } | |
806a9e39 | 2440 | |
f5fe3247 | 2441 | if (!driver_request->intersect) { |
558f6d32 LR |
2442 | if (request_wiphy->regd) |
2443 | return -EALREADY; | |
3e0c3ff3 | 2444 | |
e9763c3c JB |
2445 | regd = reg_copy_regd(rd); |
2446 | if (IS_ERR(regd)) | |
2447 | return PTR_ERR(regd); | |
3e0c3ff3 | 2448 | |
458f4f9e | 2449 | rcu_assign_pointer(request_wiphy->regd, regd); |
379b82f4 | 2450 | reset_regdomains(false, rd); |
b8295acd LR |
2451 | return 0; |
2452 | } | |
2453 | ||
f5fe3247 LR |
2454 | intersected_rd = regdom_intersect(rd, get_cfg80211_regdom()); |
2455 | if (!intersected_rd) | |
2456 | return -EINVAL; | |
b8295acd | 2457 | |
f5fe3247 LR |
2458 | /* |
2459 | * We can trash what CRDA provided now. | |
2460 | * However if a driver requested this specific regulatory | |
2461 | * domain we keep it for its private use | |
2462 | */ | |
2463 | tmp = get_wiphy_regdom(request_wiphy); | |
2464 | rcu_assign_pointer(request_wiphy->regd, rd); | |
2465 | rcu_free_regdom(tmp); | |
b8295acd | 2466 | |
f5fe3247 | 2467 | rd = NULL; |
b7566fc3 | 2468 | |
f5fe3247 | 2469 | reset_regdomains(false, intersected_rd); |
3e0c3ff3 | 2470 | |
f5fe3247 LR |
2471 | return 0; |
2472 | } | |
2473 | ||
01992406 LR |
2474 | static int reg_set_rd_country_ie(const struct ieee80211_regdomain *rd, |
2475 | struct regulatory_request *country_ie_request) | |
f5fe3247 LR |
2476 | { |
2477 | struct wiphy *request_wiphy; | |
b8295acd | 2478 | |
f5fe3247 LR |
2479 | if (!is_alpha2_set(rd->alpha2) && !is_an_alpha2(rd->alpha2) && |
2480 | !is_unknown_alpha2(rd->alpha2)) | |
2481 | return -EINVAL; | |
b8295acd | 2482 | |
f5fe3247 LR |
2483 | /* |
2484 | * Lets only bother proceeding on the same alpha2 if the current | |
2485 | * rd is non static (it means CRDA was present and was used last) | |
2486 | * and the pending request came in from a country IE | |
2487 | */ | |
2488 | ||
2489 | if (!is_valid_rd(rd)) { | |
2490 | pr_err("Invalid regulatory domain detected:\n"); | |
2491 | print_regdomain_info(rd); | |
2492 | return -EINVAL; | |
9c96477d LR |
2493 | } |
2494 | ||
01992406 | 2495 | request_wiphy = wiphy_idx_to_wiphy(country_ie_request->wiphy_idx); |
f5fe3247 | 2496 | if (!request_wiphy) { |
845f3351 SD |
2497 | queue_delayed_work(system_power_efficient_wq, |
2498 | ®_timeout, 0); | |
f5fe3247 LR |
2499 | return -ENODEV; |
2500 | } | |
b2e1b302 | 2501 | |
01992406 | 2502 | if (country_ie_request->intersect) |
f5fe3247 LR |
2503 | return -EINVAL; |
2504 | ||
2505 | reset_regdomains(false, rd); | |
2506 | return 0; | |
2507 | } | |
b2e1b302 | 2508 | |
fb1fc7ad LR |
2509 | /* |
2510 | * Use this call to set the current regulatory domain. Conflicts with | |
b2e1b302 | 2511 | * multiple drivers can be ironed out later. Caller must've already |
458f4f9e | 2512 | * kmalloc'd the rd structure. |
fb1fc7ad | 2513 | */ |
a3d2eaf0 | 2514 | int set_regdom(const struct ieee80211_regdomain *rd) |
b2e1b302 | 2515 | { |
c492db37 | 2516 | struct regulatory_request *lr; |
092008ab | 2517 | bool user_reset = false; |
b2e1b302 LR |
2518 | int r; |
2519 | ||
3b9e5aca LR |
2520 | if (!reg_is_valid_request(rd->alpha2)) { |
2521 | kfree(rd); | |
2522 | return -EINVAL; | |
2523 | } | |
2524 | ||
c492db37 | 2525 | lr = get_last_request(); |
abc7381b | 2526 | |
b2e1b302 | 2527 | /* Note that this doesn't update the wiphys, this is done below */ |
3b9e5aca LR |
2528 | switch (lr->initiator) { |
2529 | case NL80211_REGDOM_SET_BY_CORE: | |
2530 | r = reg_set_rd_core(rd); | |
2531 | break; | |
2532 | case NL80211_REGDOM_SET_BY_USER: | |
84721d44 | 2533 | r = reg_set_rd_user(rd, lr); |
092008ab | 2534 | user_reset = true; |
84721d44 | 2535 | break; |
3b9e5aca | 2536 | case NL80211_REGDOM_SET_BY_DRIVER: |
f5fe3247 LR |
2537 | r = reg_set_rd_driver(rd, lr); |
2538 | break; | |
3b9e5aca | 2539 | case NL80211_REGDOM_SET_BY_COUNTRY_IE: |
01992406 | 2540 | r = reg_set_rd_country_ie(rd, lr); |
3b9e5aca LR |
2541 | break; |
2542 | default: | |
2543 | WARN(1, "invalid initiator %d\n", lr->initiator); | |
2544 | return -EINVAL; | |
2545 | } | |
2546 | ||
d2372b31 | 2547 | if (r) { |
092008ab JD |
2548 | switch (r) { |
2549 | case -EALREADY: | |
95908535 | 2550 | reg_set_request_processed(); |
092008ab JD |
2551 | break; |
2552 | default: | |
2553 | /* Back to world regulatory in case of errors */ | |
2554 | restore_regulatory_settings(user_reset); | |
2555 | } | |
95908535 | 2556 | |
d2372b31 | 2557 | kfree(rd); |
38fd2143 | 2558 | return r; |
d2372b31 | 2559 | } |
b2e1b302 | 2560 | |
b2e1b302 | 2561 | /* This would make this whole thing pointless */ |
38fd2143 JB |
2562 | if (WARN_ON(!lr->intersect && rd != get_cfg80211_regdom())) |
2563 | return -EINVAL; | |
b2e1b302 LR |
2564 | |
2565 | /* update all wiphys now with the new established regulatory domain */ | |
c492db37 | 2566 | update_all_wiphy_regulatory(lr->initiator); |
b2e1b302 | 2567 | |
458f4f9e | 2568 | print_regdomain(get_cfg80211_regdom()); |
b2e1b302 | 2569 | |
c492db37 | 2570 | nl80211_send_reg_change_event(lr); |
73d54c9e | 2571 | |
b2e253cf LR |
2572 | reg_set_request_processed(); |
2573 | ||
38fd2143 | 2574 | return 0; |
b2e1b302 LR |
2575 | } |
2576 | ||
57b5ce07 LR |
2577 | void wiphy_regulatory_register(struct wiphy *wiphy) |
2578 | { | |
23df0b73 AN |
2579 | struct regulatory_request *lr; |
2580 | ||
57b5ce07 LR |
2581 | if (!reg_dev_ignore_cell_hint(wiphy)) |
2582 | reg_num_devs_support_basehint++; | |
2583 | ||
23df0b73 AN |
2584 | lr = get_last_request(); |
2585 | wiphy_update_regulatory(wiphy, lr->initiator); | |
57b5ce07 LR |
2586 | } |
2587 | ||
bfead080 | 2588 | void wiphy_regulatory_deregister(struct wiphy *wiphy) |
3f2355cb | 2589 | { |
0ad8acaf | 2590 | struct wiphy *request_wiphy = NULL; |
c492db37 | 2591 | struct regulatory_request *lr; |
761cf7ec | 2592 | |
c492db37 | 2593 | lr = get_last_request(); |
abc7381b | 2594 | |
57b5ce07 LR |
2595 | if (!reg_dev_ignore_cell_hint(wiphy)) |
2596 | reg_num_devs_support_basehint--; | |
2597 | ||
458f4f9e | 2598 | rcu_free_regdom(get_wiphy_regdom(wiphy)); |
34dd886c | 2599 | RCU_INIT_POINTER(wiphy->regd, NULL); |
0ef9ccdd | 2600 | |
c492db37 JB |
2601 | if (lr) |
2602 | request_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx); | |
806a9e39 | 2603 | |
0ef9ccdd | 2604 | if (!request_wiphy || request_wiphy != wiphy) |
38fd2143 | 2605 | return; |
0ef9ccdd | 2606 | |
c492db37 JB |
2607 | lr->wiphy_idx = WIPHY_IDX_INVALID; |
2608 | lr->country_ie_env = ENVIRON_ANY; | |
3f2355cb LR |
2609 | } |
2610 | ||
a90c7a31 LR |
2611 | static void reg_timeout_work(struct work_struct *work) |
2612 | { | |
1a919318 | 2613 | REG_DBG_PRINT("Timeout while waiting for CRDA to reply, restoring regulatory settings\n"); |
f77b86d7 | 2614 | rtnl_lock(); |
a90c7a31 | 2615 | restore_regulatory_settings(true); |
f77b86d7 | 2616 | rtnl_unlock(); |
a90c7a31 LR |
2617 | } |
2618 | ||
174e0cd2 IP |
2619 | /* |
2620 | * See http://www.fcc.gov/document/5-ghz-unlicensed-spectrum-unii, for | |
2621 | * UNII band definitions | |
2622 | */ | |
2623 | int cfg80211_get_unii(int freq) | |
2624 | { | |
2625 | /* UNII-1 */ | |
2626 | if (freq >= 5150 && freq <= 5250) | |
2627 | return 0; | |
2628 | ||
2629 | /* UNII-2A */ | |
2630 | if (freq > 5250 && freq <= 5350) | |
2631 | return 1; | |
2632 | ||
2633 | /* UNII-2B */ | |
2634 | if (freq > 5350 && freq <= 5470) | |
2635 | return 2; | |
2636 | ||
2637 | /* UNII-2C */ | |
2638 | if (freq > 5470 && freq <= 5725) | |
2639 | return 3; | |
2640 | ||
2641 | /* UNII-3 */ | |
2642 | if (freq > 5725 && freq <= 5825) | |
2643 | return 4; | |
2644 | ||
2645 | return -EINVAL; | |
2646 | } | |
2647 | ||
2fcc9f73 | 2648 | int __init regulatory_init(void) |
b2e1b302 | 2649 | { |
bcf4f99b | 2650 | int err = 0; |
734366de | 2651 | |
b2e1b302 LR |
2652 | reg_pdev = platform_device_register_simple("regulatory", 0, NULL, 0); |
2653 | if (IS_ERR(reg_pdev)) | |
2654 | return PTR_ERR(reg_pdev); | |
734366de | 2655 | |
fe33eb39 | 2656 | spin_lock_init(®_requests_lock); |
e38f8a7a | 2657 | spin_lock_init(®_pending_beacons_lock); |
fe33eb39 | 2658 | |
80007efe LR |
2659 | reg_regdb_size_check(); |
2660 | ||
458f4f9e | 2661 | rcu_assign_pointer(cfg80211_regdomain, cfg80211_world_regdom); |
734366de | 2662 | |
09d989d1 LR |
2663 | user_alpha2[0] = '9'; |
2664 | user_alpha2[1] = '7'; | |
2665 | ||
ae9e4b0d | 2666 | /* We always try to get an update for the static regdomain */ |
458f4f9e | 2667 | err = regulatory_hint_core(cfg80211_world_regdom->alpha2); |
ba25c141 | 2668 | if (err) { |
bcf4f99b LR |
2669 | if (err == -ENOMEM) |
2670 | return err; | |
2671 | /* | |
2672 | * N.B. kobject_uevent_env() can fail mainly for when we're out | |
2673 | * memory which is handled and propagated appropriately above | |
2674 | * but it can also fail during a netlink_broadcast() or during | |
2675 | * early boot for call_usermodehelper(). For now treat these | |
2676 | * errors as non-fatal. | |
2677 | */ | |
e9c0268f | 2678 | pr_err("kobject_uevent_env() was unable to call CRDA during init\n"); |
bcf4f99b | 2679 | } |
734366de | 2680 | |
ae9e4b0d LR |
2681 | /* |
2682 | * Finally, if the user set the module parameter treat it | |
2683 | * as a user hint. | |
2684 | */ | |
2685 | if (!is_world_regdom(ieee80211_regdom)) | |
57b5ce07 LR |
2686 | regulatory_hint_user(ieee80211_regdom, |
2687 | NL80211_USER_REG_HINT_USER); | |
ae9e4b0d | 2688 | |
b2e1b302 LR |
2689 | return 0; |
2690 | } | |
2691 | ||
1a919318 | 2692 | void regulatory_exit(void) |
b2e1b302 | 2693 | { |
fe33eb39 | 2694 | struct regulatory_request *reg_request, *tmp; |
e38f8a7a | 2695 | struct reg_beacon *reg_beacon, *btmp; |
fe33eb39 LR |
2696 | |
2697 | cancel_work_sync(®_work); | |
a90c7a31 | 2698 | cancel_delayed_work_sync(®_timeout); |
fe33eb39 | 2699 | |
9027b149 | 2700 | /* Lock to suppress warnings */ |
38fd2143 | 2701 | rtnl_lock(); |
379b82f4 | 2702 | reset_regdomains(true, NULL); |
38fd2143 | 2703 | rtnl_unlock(); |
734366de | 2704 | |
58ebacc6 | 2705 | dev_set_uevent_suppress(®_pdev->dev, true); |
f6037d09 | 2706 | |
b2e1b302 | 2707 | platform_device_unregister(reg_pdev); |
734366de | 2708 | |
fea9bced JB |
2709 | list_for_each_entry_safe(reg_beacon, btmp, ®_pending_beacons, list) { |
2710 | list_del(®_beacon->list); | |
2711 | kfree(reg_beacon); | |
e38f8a7a | 2712 | } |
e38f8a7a | 2713 | |
fea9bced JB |
2714 | list_for_each_entry_safe(reg_beacon, btmp, ®_beacon_list, list) { |
2715 | list_del(®_beacon->list); | |
2716 | kfree(reg_beacon); | |
e38f8a7a LR |
2717 | } |
2718 | ||
fea9bced JB |
2719 | list_for_each_entry_safe(reg_request, tmp, ®_requests_list, list) { |
2720 | list_del(®_request->list); | |
2721 | kfree(reg_request); | |
fe33eb39 | 2722 | } |
8318d78a | 2723 | } |