Commit | Line | Data |
---|---|---|
8318d78a JB |
1 | /* |
2 | * Copyright 2002-2005, Instant802 Networks, Inc. | |
3 | * Copyright 2005-2006, Devicescape Software, Inc. | |
4 | * Copyright 2007 Johannes Berg <johannes@sipsolutions.net> | |
3b77d5ec | 5 | * Copyright 2008-2011 Luis R. Rodriguez <mcgrof@qca.qualcomm.com> |
8318d78a | 6 | * |
3b77d5ec LR |
7 | * Permission to use, copy, modify, and/or distribute this software for any |
8 | * purpose with or without fee is hereby granted, provided that the above | |
9 | * copyright notice and this permission notice appear in all copies. | |
10 | * | |
11 | * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES | |
12 | * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF | |
13 | * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR | |
14 | * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES | |
15 | * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN | |
16 | * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF | |
17 | * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. | |
8318d78a JB |
18 | */ |
19 | ||
3b77d5ec | 20 | |
b2e1b302 LR |
21 | /** |
22 | * DOC: Wireless regulatory infrastructure | |
8318d78a JB |
23 | * |
24 | * The usual implementation is for a driver to read a device EEPROM to | |
25 | * determine which regulatory domain it should be operating under, then | |
26 | * looking up the allowable channels in a driver-local table and finally | |
27 | * registering those channels in the wiphy structure. | |
28 | * | |
b2e1b302 LR |
29 | * Another set of compliance enforcement is for drivers to use their |
30 | * own compliance limits which can be stored on the EEPROM. The host | |
31 | * driver or firmware may ensure these are used. | |
32 | * | |
33 | * In addition to all this we provide an extra layer of regulatory | |
34 | * conformance. For drivers which do not have any regulatory | |
35 | * information CRDA provides the complete regulatory solution. | |
36 | * For others it provides a community effort on further restrictions | |
37 | * to enhance compliance. | |
38 | * | |
39 | * Note: When number of rules --> infinity we will not be able to | |
40 | * index on alpha2 any more, instead we'll probably have to | |
41 | * rely on some SHA1 checksum of the regdomain for example. | |
42 | * | |
8318d78a | 43 | */ |
e9c0268f JP |
44 | |
45 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt | |
46 | ||
8318d78a | 47 | #include <linux/kernel.h> |
bc3b2d7f | 48 | #include <linux/export.h> |
5a0e3ad6 | 49 | #include <linux/slab.h> |
b2e1b302 | 50 | #include <linux/list.h> |
c61029c7 | 51 | #include <linux/ctype.h> |
b2e1b302 LR |
52 | #include <linux/nl80211.h> |
53 | #include <linux/platform_device.h> | |
d9b93842 | 54 | #include <linux/moduleparam.h> |
b2e1b302 | 55 | #include <net/cfg80211.h> |
8318d78a | 56 | #include "core.h" |
b2e1b302 | 57 | #include "reg.h" |
3b377ea9 | 58 | #include "regdb.h" |
73d54c9e | 59 | #include "nl80211.h" |
8318d78a | 60 | |
4113f751 | 61 | #ifdef CONFIG_CFG80211_REG_DEBUG |
12c5ffb5 JP |
62 | #define REG_DBG_PRINT(format, args...) \ |
63 | printk(KERN_DEBUG pr_fmt(format), ##args) | |
4113f751 | 64 | #else |
8271195e | 65 | #define REG_DBG_PRINT(args...) |
4113f751 LR |
66 | #endif |
67 | ||
2f92212b JB |
68 | enum reg_request_treatment { |
69 | REG_REQ_OK, | |
70 | REG_REQ_IGNORE, | |
71 | REG_REQ_INTERSECT, | |
72 | REG_REQ_ALREADY_SET, | |
73 | }; | |
74 | ||
a042994d LR |
75 | static struct regulatory_request core_request_world = { |
76 | .initiator = NL80211_REGDOM_SET_BY_CORE, | |
77 | .alpha2[0] = '0', | |
78 | .alpha2[1] = '0', | |
79 | .intersect = false, | |
80 | .processed = true, | |
81 | .country_ie_env = ENVIRON_ANY, | |
82 | }; | |
83 | ||
38fd2143 JB |
84 | /* |
85 | * Receipt of information from last regulatory request, | |
86 | * protected by RTNL (and can be accessed with RCU protection) | |
87 | */ | |
c492db37 JB |
88 | static struct regulatory_request __rcu *last_request = |
89 | (void __rcu *)&core_request_world; | |
734366de | 90 | |
b2e1b302 LR |
91 | /* To trigger userspace events */ |
92 | static struct platform_device *reg_pdev; | |
8318d78a | 93 | |
4d9d88d1 SJR |
94 | static struct device_type reg_device_type = { |
95 | .uevent = reg_device_uevent, | |
96 | }; | |
97 | ||
fb1fc7ad LR |
98 | /* |
99 | * Central wireless core regulatory domains, we only need two, | |
734366de | 100 | * the current one and a world regulatory domain in case we have no |
e8da2bb4 | 101 | * information to give us an alpha2. |
38fd2143 | 102 | * (protected by RTNL, can be read under RCU) |
fb1fc7ad | 103 | */ |
458f4f9e | 104 | const struct ieee80211_regdomain __rcu *cfg80211_regdomain; |
734366de | 105 | |
57b5ce07 LR |
106 | /* |
107 | * Number of devices that registered to the core | |
108 | * that support cellular base station regulatory hints | |
38fd2143 | 109 | * (protected by RTNL) |
57b5ce07 LR |
110 | */ |
111 | static int reg_num_devs_support_basehint; | |
112 | ||
458f4f9e JB |
113 | static const struct ieee80211_regdomain *get_cfg80211_regdom(void) |
114 | { | |
38fd2143 | 115 | return rtnl_dereference(cfg80211_regdomain); |
458f4f9e JB |
116 | } |
117 | ||
118 | static const struct ieee80211_regdomain *get_wiphy_regdom(struct wiphy *wiphy) | |
119 | { | |
38fd2143 | 120 | return rtnl_dereference(wiphy->regd); |
458f4f9e JB |
121 | } |
122 | ||
123 | static void rcu_free_regdom(const struct ieee80211_regdomain *r) | |
124 | { | |
125 | if (!r) | |
126 | return; | |
127 | kfree_rcu((struct ieee80211_regdomain *)r, rcu_head); | |
128 | } | |
129 | ||
c492db37 JB |
130 | static struct regulatory_request *get_last_request(void) |
131 | { | |
38fd2143 | 132 | return rcu_dereference_rtnl(last_request); |
c492db37 JB |
133 | } |
134 | ||
e38f8a7a | 135 | /* Used to queue up regulatory hints */ |
fe33eb39 LR |
136 | static LIST_HEAD(reg_requests_list); |
137 | static spinlock_t reg_requests_lock; | |
138 | ||
e38f8a7a LR |
139 | /* Used to queue up beacon hints for review */ |
140 | static LIST_HEAD(reg_pending_beacons); | |
141 | static spinlock_t reg_pending_beacons_lock; | |
142 | ||
143 | /* Used to keep track of processed beacon hints */ | |
144 | static LIST_HEAD(reg_beacon_list); | |
145 | ||
146 | struct reg_beacon { | |
147 | struct list_head list; | |
148 | struct ieee80211_channel chan; | |
149 | }; | |
150 | ||
f333a7a2 LR |
151 | static void reg_todo(struct work_struct *work); |
152 | static DECLARE_WORK(reg_work, reg_todo); | |
153 | ||
a90c7a31 LR |
154 | static void reg_timeout_work(struct work_struct *work); |
155 | static DECLARE_DELAYED_WORK(reg_timeout, reg_timeout_work); | |
156 | ||
734366de JB |
157 | /* We keep a static world regulatory domain in case of the absence of CRDA */ |
158 | static const struct ieee80211_regdomain world_regdom = { | |
90cdc6df | 159 | .n_reg_rules = 6, |
734366de JB |
160 | .alpha2 = "00", |
161 | .reg_rules = { | |
68798a62 LR |
162 | /* IEEE 802.11b/g, channels 1..11 */ |
163 | REG_RULE(2412-10, 2462+10, 40, 6, 20, 0), | |
43c771a1 JB |
164 | /* IEEE 802.11b/g, channels 12..13. */ |
165 | REG_RULE(2467-10, 2472+10, 40, 6, 20, | |
8fe02e16 | 166 | NL80211_RRF_NO_IR), |
611b6a82 LR |
167 | /* IEEE 802.11 channel 14 - Only JP enables |
168 | * this and for 802.11b only */ | |
169 | REG_RULE(2484-10, 2484+10, 20, 6, 20, | |
8fe02e16 | 170 | NL80211_RRF_NO_IR | |
611b6a82 LR |
171 | NL80211_RRF_NO_OFDM), |
172 | /* IEEE 802.11a, channel 36..48 */ | |
131a19bc | 173 | REG_RULE(5180-10, 5240+10, 160, 6, 20, |
8fe02e16 | 174 | NL80211_RRF_NO_IR), |
3fc71f77 | 175 | |
131a19bc JB |
176 | /* IEEE 802.11a, channel 52..64 - DFS required */ |
177 | REG_RULE(5260-10, 5320+10, 160, 6, 20, | |
8fe02e16 | 178 | NL80211_RRF_NO_IR | |
131a19bc JB |
179 | NL80211_RRF_DFS), |
180 | ||
181 | /* IEEE 802.11a, channel 100..144 - DFS required */ | |
182 | REG_RULE(5500-10, 5720+10, 160, 6, 20, | |
8fe02e16 | 183 | NL80211_RRF_NO_IR | |
131a19bc | 184 | NL80211_RRF_DFS), |
3fc71f77 LR |
185 | |
186 | /* IEEE 802.11a, channel 149..165 */ | |
8ab9d85c | 187 | REG_RULE(5745-10, 5825+10, 80, 6, 20, |
8fe02e16 | 188 | NL80211_RRF_NO_IR), |
90cdc6df VK |
189 | |
190 | /* IEEE 802.11ad (60gHz), channels 1..3 */ | |
191 | REG_RULE(56160+2160*1-1080, 56160+2160*3+1080, 2160, 0, 0, 0), | |
734366de JB |
192 | } |
193 | }; | |
194 | ||
38fd2143 | 195 | /* protected by RTNL */ |
a3d2eaf0 JB |
196 | static const struct ieee80211_regdomain *cfg80211_world_regdom = |
197 | &world_regdom; | |
734366de | 198 | |
6ee7d330 | 199 | static char *ieee80211_regdom = "00"; |
09d989d1 | 200 | static char user_alpha2[2]; |
6ee7d330 | 201 | |
734366de JB |
202 | module_param(ieee80211_regdom, charp, 0444); |
203 | MODULE_PARM_DESC(ieee80211_regdom, "IEEE 802.11 regulatory domain code"); | |
204 | ||
379b82f4 JB |
205 | static void reset_regdomains(bool full_reset, |
206 | const struct ieee80211_regdomain *new_regdom) | |
734366de | 207 | { |
458f4f9e | 208 | const struct ieee80211_regdomain *r; |
c492db37 | 209 | struct regulatory_request *lr; |
458f4f9e | 210 | |
38fd2143 | 211 | ASSERT_RTNL(); |
e8da2bb4 | 212 | |
458f4f9e JB |
213 | r = get_cfg80211_regdom(); |
214 | ||
942b25cf | 215 | /* avoid freeing static information or freeing something twice */ |
458f4f9e JB |
216 | if (r == cfg80211_world_regdom) |
217 | r = NULL; | |
942b25cf JB |
218 | if (cfg80211_world_regdom == &world_regdom) |
219 | cfg80211_world_regdom = NULL; | |
458f4f9e JB |
220 | if (r == &world_regdom) |
221 | r = NULL; | |
942b25cf | 222 | |
458f4f9e JB |
223 | rcu_free_regdom(r); |
224 | rcu_free_regdom(cfg80211_world_regdom); | |
734366de | 225 | |
a3d2eaf0 | 226 | cfg80211_world_regdom = &world_regdom; |
458f4f9e | 227 | rcu_assign_pointer(cfg80211_regdomain, new_regdom); |
a042994d LR |
228 | |
229 | if (!full_reset) | |
230 | return; | |
231 | ||
c492db37 JB |
232 | lr = get_last_request(); |
233 | if (lr != &core_request_world && lr) | |
234 | kfree_rcu(lr, rcu_head); | |
235 | rcu_assign_pointer(last_request, &core_request_world); | |
734366de JB |
236 | } |
237 | ||
fb1fc7ad LR |
238 | /* |
239 | * Dynamic world regulatory domain requested by the wireless | |
240 | * core upon initialization | |
241 | */ | |
a3d2eaf0 | 242 | static void update_world_regdomain(const struct ieee80211_regdomain *rd) |
734366de | 243 | { |
c492db37 | 244 | struct regulatory_request *lr; |
734366de | 245 | |
c492db37 JB |
246 | lr = get_last_request(); |
247 | ||
248 | WARN_ON(!lr); | |
734366de | 249 | |
379b82f4 | 250 | reset_regdomains(false, rd); |
734366de JB |
251 | |
252 | cfg80211_world_regdom = rd; | |
734366de | 253 | } |
734366de | 254 | |
a3d2eaf0 | 255 | bool is_world_regdom(const char *alpha2) |
b2e1b302 LR |
256 | { |
257 | if (!alpha2) | |
258 | return false; | |
1a919318 | 259 | return alpha2[0] == '0' && alpha2[1] == '0'; |
b2e1b302 | 260 | } |
8318d78a | 261 | |
a3d2eaf0 | 262 | static bool is_alpha2_set(const char *alpha2) |
b2e1b302 LR |
263 | { |
264 | if (!alpha2) | |
265 | return false; | |
1a919318 | 266 | return alpha2[0] && alpha2[1]; |
b2e1b302 | 267 | } |
8318d78a | 268 | |
a3d2eaf0 | 269 | static bool is_unknown_alpha2(const char *alpha2) |
b2e1b302 LR |
270 | { |
271 | if (!alpha2) | |
272 | return false; | |
fb1fc7ad LR |
273 | /* |
274 | * Special case where regulatory domain was built by driver | |
275 | * but a specific alpha2 cannot be determined | |
276 | */ | |
1a919318 | 277 | return alpha2[0] == '9' && alpha2[1] == '9'; |
b2e1b302 | 278 | } |
8318d78a | 279 | |
3f2355cb LR |
280 | static bool is_intersected_alpha2(const char *alpha2) |
281 | { | |
282 | if (!alpha2) | |
283 | return false; | |
fb1fc7ad LR |
284 | /* |
285 | * Special case where regulatory domain is the | |
3f2355cb | 286 | * result of an intersection between two regulatory domain |
fb1fc7ad LR |
287 | * structures |
288 | */ | |
1a919318 | 289 | return alpha2[0] == '9' && alpha2[1] == '8'; |
3f2355cb LR |
290 | } |
291 | ||
a3d2eaf0 | 292 | static bool is_an_alpha2(const char *alpha2) |
b2e1b302 LR |
293 | { |
294 | if (!alpha2) | |
295 | return false; | |
1a919318 | 296 | return isalpha(alpha2[0]) && isalpha(alpha2[1]); |
b2e1b302 | 297 | } |
8318d78a | 298 | |
a3d2eaf0 | 299 | static bool alpha2_equal(const char *alpha2_x, const char *alpha2_y) |
b2e1b302 LR |
300 | { |
301 | if (!alpha2_x || !alpha2_y) | |
302 | return false; | |
1a919318 | 303 | return alpha2_x[0] == alpha2_y[0] && alpha2_x[1] == alpha2_y[1]; |
b2e1b302 LR |
304 | } |
305 | ||
69b1572b | 306 | static bool regdom_changes(const char *alpha2) |
b2e1b302 | 307 | { |
458f4f9e | 308 | const struct ieee80211_regdomain *r = get_cfg80211_regdom(); |
761cf7ec | 309 | |
458f4f9e | 310 | if (!r) |
b2e1b302 | 311 | return true; |
458f4f9e | 312 | return !alpha2_equal(r->alpha2, alpha2); |
b2e1b302 LR |
313 | } |
314 | ||
09d989d1 LR |
315 | /* |
316 | * The NL80211_REGDOM_SET_BY_USER regdom alpha2 is cached, this lets | |
317 | * you know if a valid regulatory hint with NL80211_REGDOM_SET_BY_USER | |
318 | * has ever been issued. | |
319 | */ | |
320 | static bool is_user_regdom_saved(void) | |
321 | { | |
322 | if (user_alpha2[0] == '9' && user_alpha2[1] == '7') | |
323 | return false; | |
324 | ||
325 | /* This would indicate a mistake on the design */ | |
1a919318 | 326 | if (WARN(!is_world_regdom(user_alpha2) && !is_an_alpha2(user_alpha2), |
09d989d1 | 327 | "Unexpected user alpha2: %c%c\n", |
1a919318 | 328 | user_alpha2[0], user_alpha2[1])) |
09d989d1 LR |
329 | return false; |
330 | ||
331 | return true; | |
332 | } | |
333 | ||
e9763c3c JB |
334 | static const struct ieee80211_regdomain * |
335 | reg_copy_regd(const struct ieee80211_regdomain *src_regd) | |
3b377ea9 JL |
336 | { |
337 | struct ieee80211_regdomain *regd; | |
e9763c3c | 338 | int size_of_regd; |
3b377ea9 JL |
339 | unsigned int i; |
340 | ||
82f20856 JB |
341 | size_of_regd = |
342 | sizeof(struct ieee80211_regdomain) + | |
343 | src_regd->n_reg_rules * sizeof(struct ieee80211_reg_rule); | |
3b377ea9 JL |
344 | |
345 | regd = kzalloc(size_of_regd, GFP_KERNEL); | |
346 | if (!regd) | |
e9763c3c | 347 | return ERR_PTR(-ENOMEM); |
3b377ea9 JL |
348 | |
349 | memcpy(regd, src_regd, sizeof(struct ieee80211_regdomain)); | |
350 | ||
351 | for (i = 0; i < src_regd->n_reg_rules; i++) | |
352 | memcpy(®d->reg_rules[i], &src_regd->reg_rules[i], | |
e9763c3c | 353 | sizeof(struct ieee80211_reg_rule)); |
3b377ea9 | 354 | |
e9763c3c | 355 | return regd; |
3b377ea9 JL |
356 | } |
357 | ||
358 | #ifdef CONFIG_CFG80211_INTERNAL_REGDB | |
359 | struct reg_regdb_search_request { | |
360 | char alpha2[2]; | |
361 | struct list_head list; | |
362 | }; | |
363 | ||
364 | static LIST_HEAD(reg_regdb_search_list); | |
368d06f5 | 365 | static DEFINE_MUTEX(reg_regdb_search_mutex); |
3b377ea9 JL |
366 | |
367 | static void reg_regdb_search(struct work_struct *work) | |
368 | { | |
369 | struct reg_regdb_search_request *request; | |
e9763c3c JB |
370 | const struct ieee80211_regdomain *curdom, *regdom = NULL; |
371 | int i; | |
a85d0d7f | 372 | |
5fe231e8 | 373 | rtnl_lock(); |
3b377ea9 | 374 | |
368d06f5 | 375 | mutex_lock(®_regdb_search_mutex); |
3b377ea9 JL |
376 | while (!list_empty(®_regdb_search_list)) { |
377 | request = list_first_entry(®_regdb_search_list, | |
378 | struct reg_regdb_search_request, | |
379 | list); | |
380 | list_del(&request->list); | |
381 | ||
1a919318 | 382 | for (i = 0; i < reg_regdb_size; i++) { |
3b377ea9 JL |
383 | curdom = reg_regdb[i]; |
384 | ||
1a919318 | 385 | if (alpha2_equal(request->alpha2, curdom->alpha2)) { |
e9763c3c | 386 | regdom = reg_copy_regd(curdom); |
3b377ea9 JL |
387 | break; |
388 | } | |
389 | } | |
390 | ||
391 | kfree(request); | |
392 | } | |
368d06f5 | 393 | mutex_unlock(®_regdb_search_mutex); |
a85d0d7f | 394 | |
e9763c3c | 395 | if (!IS_ERR_OR_NULL(regdom)) |
a85d0d7f LR |
396 | set_regdom(regdom); |
397 | ||
5fe231e8 | 398 | rtnl_unlock(); |
3b377ea9 JL |
399 | } |
400 | ||
401 | static DECLARE_WORK(reg_regdb_work, reg_regdb_search); | |
402 | ||
403 | static void reg_regdb_query(const char *alpha2) | |
404 | { | |
405 | struct reg_regdb_search_request *request; | |
406 | ||
407 | if (!alpha2) | |
408 | return; | |
409 | ||
410 | request = kzalloc(sizeof(struct reg_regdb_search_request), GFP_KERNEL); | |
411 | if (!request) | |
412 | return; | |
413 | ||
414 | memcpy(request->alpha2, alpha2, 2); | |
415 | ||
368d06f5 | 416 | mutex_lock(®_regdb_search_mutex); |
3b377ea9 | 417 | list_add_tail(&request->list, ®_regdb_search_list); |
368d06f5 | 418 | mutex_unlock(®_regdb_search_mutex); |
3b377ea9 JL |
419 | |
420 | schedule_work(®_regdb_work); | |
421 | } | |
80007efe LR |
422 | |
423 | /* Feel free to add any other sanity checks here */ | |
424 | static void reg_regdb_size_check(void) | |
425 | { | |
426 | /* We should ideally BUILD_BUG_ON() but then random builds would fail */ | |
427 | WARN_ONCE(!reg_regdb_size, "db.txt is empty, you should update it..."); | |
428 | } | |
3b377ea9 | 429 | #else |
80007efe | 430 | static inline void reg_regdb_size_check(void) {} |
3b377ea9 JL |
431 | static inline void reg_regdb_query(const char *alpha2) {} |
432 | #endif /* CONFIG_CFG80211_INTERNAL_REGDB */ | |
433 | ||
fb1fc7ad LR |
434 | /* |
435 | * This lets us keep regulatory code which is updated on a regulatory | |
4d9d88d1 SJR |
436 | * basis in userspace. Country information is filled in by |
437 | * reg_device_uevent | |
fb1fc7ad | 438 | */ |
b2e1b302 LR |
439 | static int call_crda(const char *alpha2) |
440 | { | |
b2e1b302 | 441 | if (!is_world_regdom((char *) alpha2)) |
e9c0268f | 442 | pr_info("Calling CRDA for country: %c%c\n", |
b2e1b302 LR |
443 | alpha2[0], alpha2[1]); |
444 | else | |
e9c0268f | 445 | pr_info("Calling CRDA to update world regulatory domain\n"); |
b2e1b302 | 446 | |
3b377ea9 JL |
447 | /* query internal regulatory database (if it exists) */ |
448 | reg_regdb_query(alpha2); | |
449 | ||
4d9d88d1 | 450 | return kobject_uevent(®_pdev->dev.kobj, KOBJ_CHANGE); |
b2e1b302 LR |
451 | } |
452 | ||
e438768f | 453 | bool reg_is_valid_request(const char *alpha2) |
b2e1b302 | 454 | { |
c492db37 | 455 | struct regulatory_request *lr = get_last_request(); |
61405e97 | 456 | |
c492db37 | 457 | if (!lr || lr->processed) |
f6037d09 JB |
458 | return false; |
459 | ||
c492db37 | 460 | return alpha2_equal(lr->alpha2, alpha2); |
b2e1b302 | 461 | } |
8318d78a | 462 | |
b2e1b302 | 463 | /* Sanity check on a regulatory rule */ |
a3d2eaf0 | 464 | static bool is_valid_reg_rule(const struct ieee80211_reg_rule *rule) |
8318d78a | 465 | { |
a3d2eaf0 | 466 | const struct ieee80211_freq_range *freq_range = &rule->freq_range; |
b2e1b302 LR |
467 | u32 freq_diff; |
468 | ||
91e99004 | 469 | if (freq_range->start_freq_khz <= 0 || freq_range->end_freq_khz <= 0) |
b2e1b302 LR |
470 | return false; |
471 | ||
472 | if (freq_range->start_freq_khz > freq_range->end_freq_khz) | |
473 | return false; | |
474 | ||
475 | freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz; | |
476 | ||
bd05f28e | 477 | if (freq_range->end_freq_khz <= freq_range->start_freq_khz || |
1a919318 | 478 | freq_range->max_bandwidth_khz > freq_diff) |
b2e1b302 LR |
479 | return false; |
480 | ||
481 | return true; | |
482 | } | |
483 | ||
a3d2eaf0 | 484 | static bool is_valid_rd(const struct ieee80211_regdomain *rd) |
b2e1b302 | 485 | { |
a3d2eaf0 | 486 | const struct ieee80211_reg_rule *reg_rule = NULL; |
b2e1b302 | 487 | unsigned int i; |
8318d78a | 488 | |
b2e1b302 LR |
489 | if (!rd->n_reg_rules) |
490 | return false; | |
8318d78a | 491 | |
88dc1c3f LR |
492 | if (WARN_ON(rd->n_reg_rules > NL80211_MAX_SUPP_REG_RULES)) |
493 | return false; | |
494 | ||
b2e1b302 LR |
495 | for (i = 0; i < rd->n_reg_rules; i++) { |
496 | reg_rule = &rd->reg_rules[i]; | |
497 | if (!is_valid_reg_rule(reg_rule)) | |
498 | return false; | |
499 | } | |
500 | ||
501 | return true; | |
8318d78a JB |
502 | } |
503 | ||
038659e7 | 504 | static bool reg_does_bw_fit(const struct ieee80211_freq_range *freq_range, |
fe7ef5e9 | 505 | u32 center_freq_khz, u32 bw_khz) |
b2e1b302 | 506 | { |
038659e7 LR |
507 | u32 start_freq_khz, end_freq_khz; |
508 | ||
509 | start_freq_khz = center_freq_khz - (bw_khz/2); | |
510 | end_freq_khz = center_freq_khz + (bw_khz/2); | |
511 | ||
512 | if (start_freq_khz >= freq_range->start_freq_khz && | |
513 | end_freq_khz <= freq_range->end_freq_khz) | |
514 | return true; | |
515 | ||
516 | return false; | |
b2e1b302 | 517 | } |
8318d78a | 518 | |
0c7dc45d LR |
519 | /** |
520 | * freq_in_rule_band - tells us if a frequency is in a frequency band | |
521 | * @freq_range: frequency rule we want to query | |
522 | * @freq_khz: frequency we are inquiring about | |
523 | * | |
524 | * This lets us know if a specific frequency rule is or is not relevant to | |
525 | * a specific frequency's band. Bands are device specific and artificial | |
64629b9d VK |
526 | * definitions (the "2.4 GHz band", the "5 GHz band" and the "60GHz band"), |
527 | * however it is safe for now to assume that a frequency rule should not be | |
528 | * part of a frequency's band if the start freq or end freq are off by more | |
529 | * than 2 GHz for the 2.4 and 5 GHz bands, and by more than 10 GHz for the | |
530 | * 60 GHz band. | |
0c7dc45d LR |
531 | * This resolution can be lowered and should be considered as we add |
532 | * regulatory rule support for other "bands". | |
533 | **/ | |
534 | static bool freq_in_rule_band(const struct ieee80211_freq_range *freq_range, | |
1a919318 | 535 | u32 freq_khz) |
0c7dc45d LR |
536 | { |
537 | #define ONE_GHZ_IN_KHZ 1000000 | |
64629b9d VK |
538 | /* |
539 | * From 802.11ad: directional multi-gigabit (DMG): | |
540 | * Pertaining to operation in a frequency band containing a channel | |
541 | * with the Channel starting frequency above 45 GHz. | |
542 | */ | |
543 | u32 limit = freq_khz > 45 * ONE_GHZ_IN_KHZ ? | |
544 | 10 * ONE_GHZ_IN_KHZ : 2 * ONE_GHZ_IN_KHZ; | |
545 | if (abs(freq_khz - freq_range->start_freq_khz) <= limit) | |
0c7dc45d | 546 | return true; |
64629b9d | 547 | if (abs(freq_khz - freq_range->end_freq_khz) <= limit) |
0c7dc45d LR |
548 | return true; |
549 | return false; | |
550 | #undef ONE_GHZ_IN_KHZ | |
551 | } | |
552 | ||
fb1fc7ad LR |
553 | /* |
554 | * Helper for regdom_intersect(), this does the real | |
555 | * mathematical intersection fun | |
556 | */ | |
1a919318 JB |
557 | static int reg_rules_intersect(const struct ieee80211_reg_rule *rule1, |
558 | const struct ieee80211_reg_rule *rule2, | |
559 | struct ieee80211_reg_rule *intersected_rule) | |
9c96477d LR |
560 | { |
561 | const struct ieee80211_freq_range *freq_range1, *freq_range2; | |
562 | struct ieee80211_freq_range *freq_range; | |
563 | const struct ieee80211_power_rule *power_rule1, *power_rule2; | |
564 | struct ieee80211_power_rule *power_rule; | |
565 | u32 freq_diff; | |
566 | ||
567 | freq_range1 = &rule1->freq_range; | |
568 | freq_range2 = &rule2->freq_range; | |
569 | freq_range = &intersected_rule->freq_range; | |
570 | ||
571 | power_rule1 = &rule1->power_rule; | |
572 | power_rule2 = &rule2->power_rule; | |
573 | power_rule = &intersected_rule->power_rule; | |
574 | ||
575 | freq_range->start_freq_khz = max(freq_range1->start_freq_khz, | |
1a919318 | 576 | freq_range2->start_freq_khz); |
9c96477d | 577 | freq_range->end_freq_khz = min(freq_range1->end_freq_khz, |
1a919318 | 578 | freq_range2->end_freq_khz); |
9c96477d | 579 | freq_range->max_bandwidth_khz = min(freq_range1->max_bandwidth_khz, |
1a919318 | 580 | freq_range2->max_bandwidth_khz); |
9c96477d LR |
581 | |
582 | freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz; | |
583 | if (freq_range->max_bandwidth_khz > freq_diff) | |
584 | freq_range->max_bandwidth_khz = freq_diff; | |
585 | ||
586 | power_rule->max_eirp = min(power_rule1->max_eirp, | |
587 | power_rule2->max_eirp); | |
588 | power_rule->max_antenna_gain = min(power_rule1->max_antenna_gain, | |
589 | power_rule2->max_antenna_gain); | |
590 | ||
1a919318 | 591 | intersected_rule->flags = rule1->flags | rule2->flags; |
9c96477d LR |
592 | |
593 | if (!is_valid_reg_rule(intersected_rule)) | |
594 | return -EINVAL; | |
595 | ||
596 | return 0; | |
597 | } | |
598 | ||
599 | /** | |
600 | * regdom_intersect - do the intersection between two regulatory domains | |
601 | * @rd1: first regulatory domain | |
602 | * @rd2: second regulatory domain | |
603 | * | |
604 | * Use this function to get the intersection between two regulatory domains. | |
605 | * Once completed we will mark the alpha2 for the rd as intersected, "98", | |
606 | * as no one single alpha2 can represent this regulatory domain. | |
607 | * | |
608 | * Returns a pointer to the regulatory domain structure which will hold the | |
609 | * resulting intersection of rules between rd1 and rd2. We will | |
610 | * kzalloc() this structure for you. | |
611 | */ | |
1a919318 JB |
612 | static struct ieee80211_regdomain * |
613 | regdom_intersect(const struct ieee80211_regdomain *rd1, | |
614 | const struct ieee80211_regdomain *rd2) | |
9c96477d LR |
615 | { |
616 | int r, size_of_regd; | |
617 | unsigned int x, y; | |
618 | unsigned int num_rules = 0, rule_idx = 0; | |
619 | const struct ieee80211_reg_rule *rule1, *rule2; | |
620 | struct ieee80211_reg_rule *intersected_rule; | |
621 | struct ieee80211_regdomain *rd; | |
622 | /* This is just a dummy holder to help us count */ | |
74f53cd8 | 623 | struct ieee80211_reg_rule dummy_rule; |
9c96477d LR |
624 | |
625 | if (!rd1 || !rd2) | |
626 | return NULL; | |
627 | ||
fb1fc7ad LR |
628 | /* |
629 | * First we get a count of the rules we'll need, then we actually | |
9c96477d LR |
630 | * build them. This is to so we can malloc() and free() a |
631 | * regdomain once. The reason we use reg_rules_intersect() here | |
632 | * is it will return -EINVAL if the rule computed makes no sense. | |
fb1fc7ad LR |
633 | * All rules that do check out OK are valid. |
634 | */ | |
9c96477d LR |
635 | |
636 | for (x = 0; x < rd1->n_reg_rules; x++) { | |
637 | rule1 = &rd1->reg_rules[x]; | |
638 | for (y = 0; y < rd2->n_reg_rules; y++) { | |
639 | rule2 = &rd2->reg_rules[y]; | |
74f53cd8 | 640 | if (!reg_rules_intersect(rule1, rule2, &dummy_rule)) |
9c96477d | 641 | num_rules++; |
9c96477d LR |
642 | } |
643 | } | |
644 | ||
645 | if (!num_rules) | |
646 | return NULL; | |
647 | ||
648 | size_of_regd = sizeof(struct ieee80211_regdomain) + | |
82f20856 | 649 | num_rules * sizeof(struct ieee80211_reg_rule); |
9c96477d LR |
650 | |
651 | rd = kzalloc(size_of_regd, GFP_KERNEL); | |
652 | if (!rd) | |
653 | return NULL; | |
654 | ||
8a57fff0 | 655 | for (x = 0; x < rd1->n_reg_rules && rule_idx < num_rules; x++) { |
9c96477d | 656 | rule1 = &rd1->reg_rules[x]; |
8a57fff0 | 657 | for (y = 0; y < rd2->n_reg_rules && rule_idx < num_rules; y++) { |
9c96477d | 658 | rule2 = &rd2->reg_rules[y]; |
fb1fc7ad LR |
659 | /* |
660 | * This time around instead of using the stack lets | |
9c96477d | 661 | * write to the target rule directly saving ourselves |
fb1fc7ad LR |
662 | * a memcpy() |
663 | */ | |
9c96477d | 664 | intersected_rule = &rd->reg_rules[rule_idx]; |
1a919318 | 665 | r = reg_rules_intersect(rule1, rule2, intersected_rule); |
fb1fc7ad LR |
666 | /* |
667 | * No need to memset here the intersected rule here as | |
668 | * we're not using the stack anymore | |
669 | */ | |
9c96477d LR |
670 | if (r) |
671 | continue; | |
672 | rule_idx++; | |
673 | } | |
674 | } | |
675 | ||
676 | if (rule_idx != num_rules) { | |
677 | kfree(rd); | |
678 | return NULL; | |
679 | } | |
680 | ||
681 | rd->n_reg_rules = num_rules; | |
682 | rd->alpha2[0] = '9'; | |
683 | rd->alpha2[1] = '8'; | |
684 | ||
685 | return rd; | |
686 | } | |
687 | ||
fb1fc7ad LR |
688 | /* |
689 | * XXX: add support for the rest of enum nl80211_reg_rule_flags, we may | |
690 | * want to just have the channel structure use these | |
691 | */ | |
b2e1b302 LR |
692 | static u32 map_regdom_flags(u32 rd_flags) |
693 | { | |
694 | u32 channel_flags = 0; | |
8fe02e16 LR |
695 | if (rd_flags & NL80211_RRF_NO_IR_ALL) |
696 | channel_flags |= IEEE80211_CHAN_NO_IR; | |
b2e1b302 LR |
697 | if (rd_flags & NL80211_RRF_DFS) |
698 | channel_flags |= IEEE80211_CHAN_RADAR; | |
03f6b084 SF |
699 | if (rd_flags & NL80211_RRF_NO_OFDM) |
700 | channel_flags |= IEEE80211_CHAN_NO_OFDM; | |
b2e1b302 LR |
701 | return channel_flags; |
702 | } | |
703 | ||
361c9c8b JB |
704 | static const struct ieee80211_reg_rule * |
705 | freq_reg_info_regd(struct wiphy *wiphy, u32 center_freq, | |
706 | const struct ieee80211_regdomain *regd) | |
8318d78a JB |
707 | { |
708 | int i; | |
0c7dc45d | 709 | bool band_rule_found = false; |
038659e7 LR |
710 | bool bw_fits = false; |
711 | ||
3e0c3ff3 | 712 | if (!regd) |
361c9c8b | 713 | return ERR_PTR(-EINVAL); |
b2e1b302 | 714 | |
3e0c3ff3 | 715 | for (i = 0; i < regd->n_reg_rules; i++) { |
b2e1b302 LR |
716 | const struct ieee80211_reg_rule *rr; |
717 | const struct ieee80211_freq_range *fr = NULL; | |
b2e1b302 | 718 | |
3e0c3ff3 | 719 | rr = ®d->reg_rules[i]; |
b2e1b302 | 720 | fr = &rr->freq_range; |
0c7dc45d | 721 | |
fb1fc7ad LR |
722 | /* |
723 | * We only need to know if one frequency rule was | |
0c7dc45d | 724 | * was in center_freq's band, that's enough, so lets |
fb1fc7ad LR |
725 | * not overwrite it once found |
726 | */ | |
0c7dc45d LR |
727 | if (!band_rule_found) |
728 | band_rule_found = freq_in_rule_band(fr, center_freq); | |
729 | ||
fe7ef5e9 | 730 | bw_fits = reg_does_bw_fit(fr, center_freq, MHZ_TO_KHZ(20)); |
0c7dc45d | 731 | |
361c9c8b JB |
732 | if (band_rule_found && bw_fits) |
733 | return rr; | |
8318d78a JB |
734 | } |
735 | ||
0c7dc45d | 736 | if (!band_rule_found) |
361c9c8b | 737 | return ERR_PTR(-ERANGE); |
0c7dc45d | 738 | |
361c9c8b | 739 | return ERR_PTR(-EINVAL); |
b2e1b302 LR |
740 | } |
741 | ||
361c9c8b JB |
742 | const struct ieee80211_reg_rule *freq_reg_info(struct wiphy *wiphy, |
743 | u32 center_freq) | |
1fa25e41 | 744 | { |
5d885b99 | 745 | const struct ieee80211_regdomain *regd; |
c492db37 | 746 | struct regulatory_request *lr = get_last_request(); |
1a919318 | 747 | |
5d885b99 JB |
748 | /* |
749 | * Follow the driver's regulatory domain, if present, unless a country | |
750 | * IE has been processed or a user wants to help complaince further | |
751 | */ | |
c492db37 JB |
752 | if (lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && |
753 | lr->initiator != NL80211_REGDOM_SET_BY_USER && | |
5d885b99 | 754 | wiphy->regd) |
458f4f9e | 755 | regd = get_wiphy_regdom(wiphy); |
5d885b99 | 756 | else |
458f4f9e | 757 | regd = get_cfg80211_regdom(); |
5d885b99 | 758 | |
361c9c8b | 759 | return freq_reg_info_regd(wiphy, center_freq, regd); |
1fa25e41 | 760 | } |
4f366c5d | 761 | EXPORT_SYMBOL(freq_reg_info); |
b2e1b302 | 762 | |
034c6d6e | 763 | const char *reg_initiator_name(enum nl80211_reg_initiator initiator) |
926a0a09 LR |
764 | { |
765 | switch (initiator) { | |
766 | case NL80211_REGDOM_SET_BY_CORE: | |
034c6d6e | 767 | return "core"; |
926a0a09 | 768 | case NL80211_REGDOM_SET_BY_USER: |
034c6d6e | 769 | return "user"; |
926a0a09 | 770 | case NL80211_REGDOM_SET_BY_DRIVER: |
034c6d6e | 771 | return "driver"; |
926a0a09 | 772 | case NL80211_REGDOM_SET_BY_COUNTRY_IE: |
034c6d6e | 773 | return "country IE"; |
926a0a09 LR |
774 | default: |
775 | WARN_ON(1); | |
034c6d6e | 776 | return "bug"; |
926a0a09 LR |
777 | } |
778 | } | |
034c6d6e | 779 | EXPORT_SYMBOL(reg_initiator_name); |
e702d3cf | 780 | |
034c6d6e | 781 | #ifdef CONFIG_CFG80211_REG_DEBUG |
e702d3cf | 782 | static void chan_reg_rule_print_dbg(struct ieee80211_channel *chan, |
e702d3cf LR |
783 | const struct ieee80211_reg_rule *reg_rule) |
784 | { | |
785 | const struct ieee80211_power_rule *power_rule; | |
786 | const struct ieee80211_freq_range *freq_range; | |
787 | char max_antenna_gain[32]; | |
788 | ||
789 | power_rule = ®_rule->power_rule; | |
790 | freq_range = ®_rule->freq_range; | |
791 | ||
792 | if (!power_rule->max_antenna_gain) | |
793 | snprintf(max_antenna_gain, 32, "N/A"); | |
794 | else | |
795 | snprintf(max_antenna_gain, 32, "%d", power_rule->max_antenna_gain); | |
796 | ||
fe7ef5e9 JB |
797 | REG_DBG_PRINT("Updating information on frequency %d MHz with regulatory rule:\n", |
798 | chan->center_freq); | |
e702d3cf | 799 | |
56e6786e | 800 | REG_DBG_PRINT("%d KHz - %d KHz @ %d KHz), (%s mBi, %d mBm)\n", |
1a919318 JB |
801 | freq_range->start_freq_khz, freq_range->end_freq_khz, |
802 | freq_range->max_bandwidth_khz, max_antenna_gain, | |
e702d3cf LR |
803 | power_rule->max_eirp); |
804 | } | |
805 | #else | |
806 | static void chan_reg_rule_print_dbg(struct ieee80211_channel *chan, | |
e702d3cf LR |
807 | const struct ieee80211_reg_rule *reg_rule) |
808 | { | |
809 | return; | |
810 | } | |
926a0a09 LR |
811 | #endif |
812 | ||
038659e7 LR |
813 | /* |
814 | * Note that right now we assume the desired channel bandwidth | |
815 | * is always 20 MHz for each individual channel (HT40 uses 20 MHz | |
fe7ef5e9 | 816 | * per channel, the primary and the extension channel). |
038659e7 | 817 | */ |
7ca43d03 LR |
818 | static void handle_channel(struct wiphy *wiphy, |
819 | enum nl80211_reg_initiator initiator, | |
fdc9d7b2 | 820 | struct ieee80211_channel *chan) |
b2e1b302 | 821 | { |
038659e7 | 822 | u32 flags, bw_flags = 0; |
b2e1b302 LR |
823 | const struct ieee80211_reg_rule *reg_rule = NULL; |
824 | const struct ieee80211_power_rule *power_rule = NULL; | |
038659e7 | 825 | const struct ieee80211_freq_range *freq_range = NULL; |
fe33eb39 | 826 | struct wiphy *request_wiphy = NULL; |
c492db37 | 827 | struct regulatory_request *lr = get_last_request(); |
a92a3ce7 | 828 | |
c492db37 | 829 | request_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx); |
a92a3ce7 LR |
830 | |
831 | flags = chan->orig_flags; | |
b2e1b302 | 832 | |
361c9c8b JB |
833 | reg_rule = freq_reg_info(wiphy, MHZ_TO_KHZ(chan->center_freq)); |
834 | if (IS_ERR(reg_rule)) { | |
ca4ffe8f LR |
835 | /* |
836 | * We will disable all channels that do not match our | |
25985edc | 837 | * received regulatory rule unless the hint is coming |
ca4ffe8f LR |
838 | * from a Country IE and the Country IE had no information |
839 | * about a band. The IEEE 802.11 spec allows for an AP | |
840 | * to send only a subset of the regulatory rules allowed, | |
841 | * so an AP in the US that only supports 2.4 GHz may only send | |
842 | * a country IE with information for the 2.4 GHz band | |
843 | * while 5 GHz is still supported. | |
844 | */ | |
845 | if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE && | |
361c9c8b | 846 | PTR_ERR(reg_rule) == -ERANGE) |
ca4ffe8f LR |
847 | return; |
848 | ||
cc493e4f LR |
849 | if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER && |
850 | request_wiphy && request_wiphy == wiphy && | |
851 | request_wiphy->flags & WIPHY_FLAG_STRICT_REGULATORY) { | |
852 | REG_DBG_PRINT("Disabling freq %d MHz for good\n", | |
853 | chan->center_freq); | |
854 | chan->orig_flags |= IEEE80211_CHAN_DISABLED; | |
855 | chan->flags = chan->orig_flags; | |
856 | } else { | |
857 | REG_DBG_PRINT("Disabling freq %d MHz\n", | |
858 | chan->center_freq); | |
859 | chan->flags |= IEEE80211_CHAN_DISABLED; | |
860 | } | |
8318d78a | 861 | return; |
ca4ffe8f | 862 | } |
8318d78a | 863 | |
fe7ef5e9 | 864 | chan_reg_rule_print_dbg(chan, reg_rule); |
e702d3cf | 865 | |
b2e1b302 | 866 | power_rule = ®_rule->power_rule; |
038659e7 LR |
867 | freq_range = ®_rule->freq_range; |
868 | ||
869 | if (freq_range->max_bandwidth_khz < MHZ_TO_KHZ(40)) | |
870 | bw_flags = IEEE80211_CHAN_NO_HT40; | |
c7a6ee27 JB |
871 | if (freq_range->max_bandwidth_khz < MHZ_TO_KHZ(80)) |
872 | bw_flags |= IEEE80211_CHAN_NO_80MHZ; | |
873 | if (freq_range->max_bandwidth_khz < MHZ_TO_KHZ(160)) | |
874 | bw_flags |= IEEE80211_CHAN_NO_160MHZ; | |
b2e1b302 | 875 | |
c492db37 | 876 | if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER && |
806a9e39 | 877 | request_wiphy && request_wiphy == wiphy && |
5be83de5 | 878 | request_wiphy->flags & WIPHY_FLAG_STRICT_REGULATORY) { |
fb1fc7ad | 879 | /* |
25985edc | 880 | * This guarantees the driver's requested regulatory domain |
f976376d | 881 | * will always be used as a base for further regulatory |
fb1fc7ad LR |
882 | * settings |
883 | */ | |
f976376d | 884 | chan->flags = chan->orig_flags = |
038659e7 | 885 | map_regdom_flags(reg_rule->flags) | bw_flags; |
f976376d LR |
886 | chan->max_antenna_gain = chan->orig_mag = |
887 | (int) MBI_TO_DBI(power_rule->max_antenna_gain); | |
279f0f55 | 888 | chan->max_reg_power = chan->max_power = chan->orig_mpwr = |
f976376d LR |
889 | (int) MBM_TO_DBM(power_rule->max_eirp); |
890 | return; | |
891 | } | |
892 | ||
04f39047 SW |
893 | chan->dfs_state = NL80211_DFS_USABLE; |
894 | chan->dfs_state_entered = jiffies; | |
895 | ||
aa3d7eef | 896 | chan->beacon_found = false; |
038659e7 | 897 | chan->flags = flags | bw_flags | map_regdom_flags(reg_rule->flags); |
1a919318 JB |
898 | chan->max_antenna_gain = |
899 | min_t(int, chan->orig_mag, | |
900 | MBI_TO_DBI(power_rule->max_antenna_gain)); | |
eccc068e | 901 | chan->max_reg_power = (int) MBM_TO_DBM(power_rule->max_eirp); |
5e31fc08 SG |
902 | if (chan->orig_mpwr) { |
903 | /* | |
904 | * Devices that have their own custom regulatory domain | |
905 | * but also use WIPHY_FLAG_STRICT_REGULATORY will follow the | |
906 | * passed country IE power settings. | |
907 | */ | |
908 | if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE && | |
909 | wiphy->flags & WIPHY_FLAG_CUSTOM_REGULATORY && | |
910 | wiphy->flags & WIPHY_FLAG_STRICT_REGULATORY) | |
911 | chan->max_power = chan->max_reg_power; | |
912 | else | |
913 | chan->max_power = min(chan->orig_mpwr, | |
914 | chan->max_reg_power); | |
915 | } else | |
916 | chan->max_power = chan->max_reg_power; | |
8318d78a JB |
917 | } |
918 | ||
7ca43d03 | 919 | static void handle_band(struct wiphy *wiphy, |
fdc9d7b2 JB |
920 | enum nl80211_reg_initiator initiator, |
921 | struct ieee80211_supported_band *sband) | |
8318d78a | 922 | { |
a92a3ce7 | 923 | unsigned int i; |
a92a3ce7 | 924 | |
fdc9d7b2 JB |
925 | if (!sband) |
926 | return; | |
8318d78a JB |
927 | |
928 | for (i = 0; i < sband->n_channels; i++) | |
fdc9d7b2 | 929 | handle_channel(wiphy, initiator, &sband->channels[i]); |
8318d78a JB |
930 | } |
931 | ||
57b5ce07 LR |
932 | static bool reg_request_cell_base(struct regulatory_request *request) |
933 | { | |
934 | if (request->initiator != NL80211_REGDOM_SET_BY_USER) | |
935 | return false; | |
1a919318 | 936 | return request->user_reg_hint_type == NL80211_USER_REG_HINT_CELL_BASE; |
57b5ce07 LR |
937 | } |
938 | ||
939 | bool reg_last_request_cell_base(void) | |
940 | { | |
38fd2143 | 941 | return reg_request_cell_base(get_last_request()); |
57b5ce07 LR |
942 | } |
943 | ||
944 | #ifdef CONFIG_CFG80211_CERTIFICATION_ONUS | |
57b5ce07 | 945 | /* Core specific check */ |
2f92212b JB |
946 | static enum reg_request_treatment |
947 | reg_ignore_cell_hint(struct regulatory_request *pending_request) | |
57b5ce07 | 948 | { |
c492db37 JB |
949 | struct regulatory_request *lr = get_last_request(); |
950 | ||
57b5ce07 | 951 | if (!reg_num_devs_support_basehint) |
2f92212b | 952 | return REG_REQ_IGNORE; |
57b5ce07 | 953 | |
c492db37 | 954 | if (reg_request_cell_base(lr) && |
1a919318 | 955 | !regdom_changes(pending_request->alpha2)) |
2f92212b | 956 | return REG_REQ_ALREADY_SET; |
1a919318 | 957 | |
2f92212b | 958 | return REG_REQ_OK; |
57b5ce07 LR |
959 | } |
960 | ||
961 | /* Device specific check */ | |
962 | static bool reg_dev_ignore_cell_hint(struct wiphy *wiphy) | |
963 | { | |
1a919318 | 964 | return !(wiphy->features & NL80211_FEATURE_CELL_BASE_REG_HINTS); |
57b5ce07 LR |
965 | } |
966 | #else | |
967 | static int reg_ignore_cell_hint(struct regulatory_request *pending_request) | |
968 | { | |
2f92212b | 969 | return REG_REQ_IGNORE; |
57b5ce07 | 970 | } |
1a919318 JB |
971 | |
972 | static bool reg_dev_ignore_cell_hint(struct wiphy *wiphy) | |
57b5ce07 LR |
973 | { |
974 | return true; | |
975 | } | |
976 | #endif | |
977 | ||
fa1fb9cb LR |
978 | static bool wiphy_strict_alpha2_regd(struct wiphy *wiphy) |
979 | { | |
980 | if (wiphy->flags & WIPHY_FLAG_STRICT_REGULATORY && | |
981 | !(wiphy->flags & WIPHY_FLAG_CUSTOM_REGULATORY)) | |
982 | return true; | |
983 | return false; | |
984 | } | |
57b5ce07 | 985 | |
7db90f4a LR |
986 | static bool ignore_reg_update(struct wiphy *wiphy, |
987 | enum nl80211_reg_initiator initiator) | |
14b9815a | 988 | { |
c492db37 JB |
989 | struct regulatory_request *lr = get_last_request(); |
990 | ||
991 | if (!lr) { | |
034c6d6e LR |
992 | REG_DBG_PRINT("Ignoring regulatory request set by %s " |
993 | "since last_request is not set\n", | |
926a0a09 | 994 | reg_initiator_name(initiator)); |
14b9815a | 995 | return true; |
926a0a09 LR |
996 | } |
997 | ||
7db90f4a | 998 | if (initiator == NL80211_REGDOM_SET_BY_CORE && |
926a0a09 | 999 | wiphy->flags & WIPHY_FLAG_CUSTOM_REGULATORY) { |
034c6d6e LR |
1000 | REG_DBG_PRINT("Ignoring regulatory request set by %s " |
1001 | "since the driver uses its own custom " | |
1002 | "regulatory domain\n", | |
926a0a09 | 1003 | reg_initiator_name(initiator)); |
14b9815a | 1004 | return true; |
926a0a09 LR |
1005 | } |
1006 | ||
fb1fc7ad LR |
1007 | /* |
1008 | * wiphy->regd will be set once the device has its own | |
1009 | * desired regulatory domain set | |
1010 | */ | |
fa1fb9cb | 1011 | if (wiphy_strict_alpha2_regd(wiphy) && !wiphy->regd && |
749b527b | 1012 | initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && |
c492db37 | 1013 | !is_world_regdom(lr->alpha2)) { |
034c6d6e LR |
1014 | REG_DBG_PRINT("Ignoring regulatory request set by %s " |
1015 | "since the driver requires its own regulatory " | |
1016 | "domain to be set first\n", | |
926a0a09 | 1017 | reg_initiator_name(initiator)); |
14b9815a | 1018 | return true; |
926a0a09 LR |
1019 | } |
1020 | ||
c492db37 | 1021 | if (reg_request_cell_base(lr)) |
57b5ce07 LR |
1022 | return reg_dev_ignore_cell_hint(wiphy); |
1023 | ||
14b9815a LR |
1024 | return false; |
1025 | } | |
1026 | ||
3195e489 LR |
1027 | static bool reg_is_world_roaming(struct wiphy *wiphy) |
1028 | { | |
1029 | const struct ieee80211_regdomain *cr = get_cfg80211_regdom(); | |
1030 | const struct ieee80211_regdomain *wr = get_wiphy_regdom(wiphy); | |
1031 | struct regulatory_request *lr = get_last_request(); | |
1032 | ||
1033 | if (is_world_regdom(cr->alpha2) || (wr && is_world_regdom(wr->alpha2))) | |
1034 | return true; | |
1035 | ||
1036 | if (lr && lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && | |
1037 | wiphy->flags & WIPHY_FLAG_CUSTOM_REGULATORY) | |
1038 | return true; | |
1039 | ||
1040 | return false; | |
1041 | } | |
1042 | ||
1a919318 | 1043 | static void handle_reg_beacon(struct wiphy *wiphy, unsigned int chan_idx, |
e38f8a7a LR |
1044 | struct reg_beacon *reg_beacon) |
1045 | { | |
e38f8a7a LR |
1046 | struct ieee80211_supported_band *sband; |
1047 | struct ieee80211_channel *chan; | |
6bad8766 LR |
1048 | bool channel_changed = false; |
1049 | struct ieee80211_channel chan_before; | |
e38f8a7a | 1050 | |
e38f8a7a LR |
1051 | sband = wiphy->bands[reg_beacon->chan.band]; |
1052 | chan = &sband->channels[chan_idx]; | |
1053 | ||
1054 | if (likely(chan->center_freq != reg_beacon->chan.center_freq)) | |
1055 | return; | |
1056 | ||
6bad8766 LR |
1057 | if (chan->beacon_found) |
1058 | return; | |
1059 | ||
1060 | chan->beacon_found = true; | |
1061 | ||
0f500a5f LR |
1062 | if (!reg_is_world_roaming(wiphy)) |
1063 | return; | |
1064 | ||
5be83de5 | 1065 | if (wiphy->flags & WIPHY_FLAG_DISABLE_BEACON_HINTS) |
37184244 LR |
1066 | return; |
1067 | ||
6bad8766 LR |
1068 | chan_before.center_freq = chan->center_freq; |
1069 | chan_before.flags = chan->flags; | |
1070 | ||
8fe02e16 LR |
1071 | if (chan->flags & IEEE80211_CHAN_NO_IR) { |
1072 | chan->flags &= ~IEEE80211_CHAN_NO_IR; | |
6bad8766 | 1073 | channel_changed = true; |
e38f8a7a LR |
1074 | } |
1075 | ||
6bad8766 LR |
1076 | if (channel_changed) |
1077 | nl80211_send_beacon_hint_event(wiphy, &chan_before, chan); | |
e38f8a7a LR |
1078 | } |
1079 | ||
1080 | /* | |
1081 | * Called when a scan on a wiphy finds a beacon on | |
1082 | * new channel | |
1083 | */ | |
1084 | static void wiphy_update_new_beacon(struct wiphy *wiphy, | |
1085 | struct reg_beacon *reg_beacon) | |
1086 | { | |
1087 | unsigned int i; | |
1088 | struct ieee80211_supported_band *sband; | |
1089 | ||
e38f8a7a LR |
1090 | if (!wiphy->bands[reg_beacon->chan.band]) |
1091 | return; | |
1092 | ||
1093 | sband = wiphy->bands[reg_beacon->chan.band]; | |
1094 | ||
1095 | for (i = 0; i < sband->n_channels; i++) | |
1096 | handle_reg_beacon(wiphy, i, reg_beacon); | |
1097 | } | |
1098 | ||
1099 | /* | |
1100 | * Called upon reg changes or a new wiphy is added | |
1101 | */ | |
1102 | static void wiphy_update_beacon_reg(struct wiphy *wiphy) | |
1103 | { | |
1104 | unsigned int i; | |
1105 | struct ieee80211_supported_band *sband; | |
1106 | struct reg_beacon *reg_beacon; | |
1107 | ||
e38f8a7a LR |
1108 | list_for_each_entry(reg_beacon, ®_beacon_list, list) { |
1109 | if (!wiphy->bands[reg_beacon->chan.band]) | |
1110 | continue; | |
1111 | sband = wiphy->bands[reg_beacon->chan.band]; | |
1112 | for (i = 0; i < sband->n_channels; i++) | |
1113 | handle_reg_beacon(wiphy, i, reg_beacon); | |
1114 | } | |
1115 | } | |
1116 | ||
e38f8a7a LR |
1117 | /* Reap the advantages of previously found beacons */ |
1118 | static void reg_process_beacons(struct wiphy *wiphy) | |
1119 | { | |
b1ed8ddd LR |
1120 | /* |
1121 | * Means we are just firing up cfg80211, so no beacons would | |
1122 | * have been processed yet. | |
1123 | */ | |
1124 | if (!last_request) | |
1125 | return; | |
e38f8a7a LR |
1126 | wiphy_update_beacon_reg(wiphy); |
1127 | } | |
1128 | ||
1a919318 | 1129 | static bool is_ht40_allowed(struct ieee80211_channel *chan) |
038659e7 LR |
1130 | { |
1131 | if (!chan) | |
1a919318 | 1132 | return false; |
038659e7 | 1133 | if (chan->flags & IEEE80211_CHAN_DISABLED) |
1a919318 | 1134 | return false; |
038659e7 | 1135 | /* This would happen when regulatory rules disallow HT40 completely */ |
55b183ad FF |
1136 | if ((chan->flags & IEEE80211_CHAN_NO_HT40) == IEEE80211_CHAN_NO_HT40) |
1137 | return false; | |
1138 | return true; | |
038659e7 LR |
1139 | } |
1140 | ||
1141 | static void reg_process_ht_flags_channel(struct wiphy *wiphy, | |
fdc9d7b2 | 1142 | struct ieee80211_channel *channel) |
038659e7 | 1143 | { |
fdc9d7b2 | 1144 | struct ieee80211_supported_band *sband = wiphy->bands[channel->band]; |
038659e7 LR |
1145 | struct ieee80211_channel *channel_before = NULL, *channel_after = NULL; |
1146 | unsigned int i; | |
1147 | ||
1a919318 | 1148 | if (!is_ht40_allowed(channel)) { |
038659e7 LR |
1149 | channel->flags |= IEEE80211_CHAN_NO_HT40; |
1150 | return; | |
1151 | } | |
1152 | ||
1153 | /* | |
1154 | * We need to ensure the extension channels exist to | |
1155 | * be able to use HT40- or HT40+, this finds them (or not) | |
1156 | */ | |
1157 | for (i = 0; i < sband->n_channels; i++) { | |
1158 | struct ieee80211_channel *c = &sband->channels[i]; | |
1a919318 | 1159 | |
038659e7 LR |
1160 | if (c->center_freq == (channel->center_freq - 20)) |
1161 | channel_before = c; | |
1162 | if (c->center_freq == (channel->center_freq + 20)) | |
1163 | channel_after = c; | |
1164 | } | |
1165 | ||
1166 | /* | |
1167 | * Please note that this assumes target bandwidth is 20 MHz, | |
1168 | * if that ever changes we also need to change the below logic | |
1169 | * to include that as well. | |
1170 | */ | |
1a919318 | 1171 | if (!is_ht40_allowed(channel_before)) |
689da1b3 | 1172 | channel->flags |= IEEE80211_CHAN_NO_HT40MINUS; |
038659e7 | 1173 | else |
689da1b3 | 1174 | channel->flags &= ~IEEE80211_CHAN_NO_HT40MINUS; |
038659e7 | 1175 | |
1a919318 | 1176 | if (!is_ht40_allowed(channel_after)) |
689da1b3 | 1177 | channel->flags |= IEEE80211_CHAN_NO_HT40PLUS; |
038659e7 | 1178 | else |
689da1b3 | 1179 | channel->flags &= ~IEEE80211_CHAN_NO_HT40PLUS; |
038659e7 LR |
1180 | } |
1181 | ||
1182 | static void reg_process_ht_flags_band(struct wiphy *wiphy, | |
fdc9d7b2 | 1183 | struct ieee80211_supported_band *sband) |
038659e7 LR |
1184 | { |
1185 | unsigned int i; | |
038659e7 | 1186 | |
fdc9d7b2 JB |
1187 | if (!sband) |
1188 | return; | |
038659e7 LR |
1189 | |
1190 | for (i = 0; i < sband->n_channels; i++) | |
fdc9d7b2 | 1191 | reg_process_ht_flags_channel(wiphy, &sband->channels[i]); |
038659e7 LR |
1192 | } |
1193 | ||
1194 | static void reg_process_ht_flags(struct wiphy *wiphy) | |
1195 | { | |
1196 | enum ieee80211_band band; | |
1197 | ||
1198 | if (!wiphy) | |
1199 | return; | |
1200 | ||
fdc9d7b2 JB |
1201 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) |
1202 | reg_process_ht_flags_band(wiphy, wiphy->bands[band]); | |
038659e7 LR |
1203 | } |
1204 | ||
eac03e38 SN |
1205 | static void wiphy_update_regulatory(struct wiphy *wiphy, |
1206 | enum nl80211_reg_initiator initiator) | |
b2e1b302 LR |
1207 | { |
1208 | enum ieee80211_band band; | |
c492db37 | 1209 | struct regulatory_request *lr = get_last_request(); |
eac03e38 | 1210 | |
7db90f4a | 1211 | if (ignore_reg_update(wiphy, initiator)) |
a203c2aa SN |
1212 | return; |
1213 | ||
c492db37 | 1214 | lr->dfs_region = get_cfg80211_regdom()->dfs_region; |
b68e6b3b | 1215 | |
fdc9d7b2 JB |
1216 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) |
1217 | handle_band(wiphy, initiator, wiphy->bands[band]); | |
a203c2aa | 1218 | |
e38f8a7a | 1219 | reg_process_beacons(wiphy); |
038659e7 | 1220 | reg_process_ht_flags(wiphy); |
1a919318 | 1221 | |
560e28e1 | 1222 | if (wiphy->reg_notifier) |
c492db37 | 1223 | wiphy->reg_notifier(wiphy, lr); |
b2e1b302 LR |
1224 | } |
1225 | ||
d7549cbb SN |
1226 | static void update_all_wiphy_regulatory(enum nl80211_reg_initiator initiator) |
1227 | { | |
1228 | struct cfg80211_registered_device *rdev; | |
4a38994f | 1229 | struct wiphy *wiphy; |
d7549cbb | 1230 | |
5fe231e8 | 1231 | ASSERT_RTNL(); |
458f4f9e | 1232 | |
4a38994f RM |
1233 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) { |
1234 | wiphy = &rdev->wiphy; | |
1235 | wiphy_update_regulatory(wiphy, initiator); | |
1236 | /* | |
1237 | * Regulatory updates set by CORE are ignored for custom | |
1238 | * regulatory cards. Let us notify the changes to the driver, | |
1239 | * as some drivers used this to restore its orig_* reg domain. | |
1240 | */ | |
1241 | if (initiator == NL80211_REGDOM_SET_BY_CORE && | |
1242 | wiphy->flags & WIPHY_FLAG_CUSTOM_REGULATORY && | |
1243 | wiphy->reg_notifier) | |
c492db37 | 1244 | wiphy->reg_notifier(wiphy, get_last_request()); |
4a38994f | 1245 | } |
d7549cbb SN |
1246 | } |
1247 | ||
1fa25e41 | 1248 | static void handle_channel_custom(struct wiphy *wiphy, |
fdc9d7b2 | 1249 | struct ieee80211_channel *chan, |
1fa25e41 LR |
1250 | const struct ieee80211_regdomain *regd) |
1251 | { | |
038659e7 | 1252 | u32 bw_flags = 0; |
1fa25e41 LR |
1253 | const struct ieee80211_reg_rule *reg_rule = NULL; |
1254 | const struct ieee80211_power_rule *power_rule = NULL; | |
038659e7 | 1255 | const struct ieee80211_freq_range *freq_range = NULL; |
ac46d48e | 1256 | |
361c9c8b JB |
1257 | reg_rule = freq_reg_info_regd(wiphy, MHZ_TO_KHZ(chan->center_freq), |
1258 | regd); | |
1fa25e41 | 1259 | |
361c9c8b | 1260 | if (IS_ERR(reg_rule)) { |
fe7ef5e9 JB |
1261 | REG_DBG_PRINT("Disabling freq %d MHz as custom regd has no rule that fits it\n", |
1262 | chan->center_freq); | |
cc493e4f LR |
1263 | chan->orig_flags |= IEEE80211_CHAN_DISABLED; |
1264 | chan->flags = chan->orig_flags; | |
1fa25e41 LR |
1265 | return; |
1266 | } | |
1267 | ||
fe7ef5e9 | 1268 | chan_reg_rule_print_dbg(chan, reg_rule); |
e702d3cf | 1269 | |
1fa25e41 | 1270 | power_rule = ®_rule->power_rule; |
038659e7 LR |
1271 | freq_range = ®_rule->freq_range; |
1272 | ||
1273 | if (freq_range->max_bandwidth_khz < MHZ_TO_KHZ(40)) | |
1274 | bw_flags = IEEE80211_CHAN_NO_HT40; | |
c7a6ee27 JB |
1275 | if (freq_range->max_bandwidth_khz < MHZ_TO_KHZ(80)) |
1276 | bw_flags |= IEEE80211_CHAN_NO_80MHZ; | |
1277 | if (freq_range->max_bandwidth_khz < MHZ_TO_KHZ(160)) | |
1278 | bw_flags |= IEEE80211_CHAN_NO_160MHZ; | |
1fa25e41 | 1279 | |
038659e7 | 1280 | chan->flags |= map_regdom_flags(reg_rule->flags) | bw_flags; |
1fa25e41 | 1281 | chan->max_antenna_gain = (int) MBI_TO_DBI(power_rule->max_antenna_gain); |
279f0f55 FF |
1282 | chan->max_reg_power = chan->max_power = |
1283 | (int) MBM_TO_DBM(power_rule->max_eirp); | |
1fa25e41 LR |
1284 | } |
1285 | ||
fdc9d7b2 JB |
1286 | static void handle_band_custom(struct wiphy *wiphy, |
1287 | struct ieee80211_supported_band *sband, | |
1fa25e41 LR |
1288 | const struct ieee80211_regdomain *regd) |
1289 | { | |
1290 | unsigned int i; | |
1fa25e41 | 1291 | |
fdc9d7b2 JB |
1292 | if (!sband) |
1293 | return; | |
1fa25e41 LR |
1294 | |
1295 | for (i = 0; i < sband->n_channels; i++) | |
fdc9d7b2 | 1296 | handle_channel_custom(wiphy, &sband->channels[i], regd); |
1fa25e41 LR |
1297 | } |
1298 | ||
1299 | /* Used by drivers prior to wiphy registration */ | |
1300 | void wiphy_apply_custom_regulatory(struct wiphy *wiphy, | |
1301 | const struct ieee80211_regdomain *regd) | |
1302 | { | |
1303 | enum ieee80211_band band; | |
bbcf3f02 | 1304 | unsigned int bands_set = 0; |
ac46d48e | 1305 | |
222ea581 LR |
1306 | WARN(!(wiphy->flags & WIPHY_FLAG_CUSTOM_REGULATORY), |
1307 | "wiphy should have WIPHY_FLAG_CUSTOM_REGULATORY\n"); | |
1308 | wiphy->flags |= WIPHY_FLAG_CUSTOM_REGULATORY; | |
1309 | ||
1fa25e41 | 1310 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) { |
bbcf3f02 LR |
1311 | if (!wiphy->bands[band]) |
1312 | continue; | |
fdc9d7b2 | 1313 | handle_band_custom(wiphy, wiphy->bands[band], regd); |
bbcf3f02 | 1314 | bands_set++; |
b2e1b302 | 1315 | } |
bbcf3f02 LR |
1316 | |
1317 | /* | |
1318 | * no point in calling this if it won't have any effect | |
1a919318 | 1319 | * on your device's supported bands. |
bbcf3f02 LR |
1320 | */ |
1321 | WARN_ON(!bands_set); | |
b2e1b302 | 1322 | } |
1fa25e41 LR |
1323 | EXPORT_SYMBOL(wiphy_apply_custom_regulatory); |
1324 | ||
84fa4f43 JB |
1325 | /* This has the logic which determines when a new request |
1326 | * should be ignored. */ | |
2f92212b JB |
1327 | static enum reg_request_treatment |
1328 | get_reg_request_treatment(struct wiphy *wiphy, | |
2f92cd2e | 1329 | struct regulatory_request *pending_request) |
84fa4f43 | 1330 | { |
806a9e39 | 1331 | struct wiphy *last_wiphy = NULL; |
c492db37 | 1332 | struct regulatory_request *lr = get_last_request(); |
761cf7ec | 1333 | |
84fa4f43 | 1334 | /* All initial requests are respected */ |
c492db37 | 1335 | if (!lr) |
2f92212b | 1336 | return REG_REQ_OK; |
84fa4f43 | 1337 | |
2f92cd2e | 1338 | switch (pending_request->initiator) { |
7db90f4a | 1339 | case NL80211_REGDOM_SET_BY_CORE: |
0d97a619 | 1340 | case NL80211_REGDOM_SET_BY_USER: |
b3eb7f3f | 1341 | return REG_REQ_IGNORE; |
7db90f4a | 1342 | case NL80211_REGDOM_SET_BY_COUNTRY_IE: |
c492db37 | 1343 | if (reg_request_cell_base(lr)) { |
57b5ce07 LR |
1344 | /* Trust a Cell base station over the AP's country IE */ |
1345 | if (regdom_changes(pending_request->alpha2)) | |
2f92212b JB |
1346 | return REG_REQ_IGNORE; |
1347 | return REG_REQ_ALREADY_SET; | |
57b5ce07 LR |
1348 | } |
1349 | ||
c492db37 | 1350 | last_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx); |
806a9e39 | 1351 | |
2f92cd2e | 1352 | if (unlikely(!is_an_alpha2(pending_request->alpha2))) |
84fa4f43 | 1353 | return -EINVAL; |
c492db37 | 1354 | if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) { |
806a9e39 | 1355 | if (last_wiphy != wiphy) { |
84fa4f43 JB |
1356 | /* |
1357 | * Two cards with two APs claiming different | |
1fe90b03 | 1358 | * Country IE alpha2s. We could |
84fa4f43 JB |
1359 | * intersect them, but that seems unlikely |
1360 | * to be correct. Reject second one for now. | |
1361 | */ | |
2f92cd2e | 1362 | if (regdom_changes(pending_request->alpha2)) |
2f92212b JB |
1363 | return REG_REQ_IGNORE; |
1364 | return REG_REQ_ALREADY_SET; | |
84fa4f43 | 1365 | } |
fb1fc7ad LR |
1366 | /* |
1367 | * Two consecutive Country IE hints on the same wiphy. | |
1368 | * This should be picked up early by the driver/stack | |
1369 | */ | |
2f92cd2e | 1370 | if (WARN_ON(regdom_changes(pending_request->alpha2))) |
2f92212b JB |
1371 | return REG_REQ_OK; |
1372 | return REG_REQ_ALREADY_SET; | |
84fa4f43 | 1373 | } |
3430140a | 1374 | return REG_REQ_OK; |
7db90f4a | 1375 | case NL80211_REGDOM_SET_BY_DRIVER: |
c492db37 | 1376 | if (lr->initiator == NL80211_REGDOM_SET_BY_CORE) { |
2f92cd2e | 1377 | if (regdom_changes(pending_request->alpha2)) |
2f92212b JB |
1378 | return REG_REQ_OK; |
1379 | return REG_REQ_ALREADY_SET; | |
e74b1e7f | 1380 | } |
fff32c04 LR |
1381 | |
1382 | /* | |
1383 | * This would happen if you unplug and plug your card | |
1384 | * back in or if you add a new device for which the previously | |
1385 | * loaded card also agrees on the regulatory domain. | |
1386 | */ | |
c492db37 | 1387 | if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER && |
2f92cd2e | 1388 | !regdom_changes(pending_request->alpha2)) |
2f92212b | 1389 | return REG_REQ_ALREADY_SET; |
fff32c04 | 1390 | |
2f92212b | 1391 | return REG_REQ_INTERSECT; |
84fa4f43 JB |
1392 | } |
1393 | ||
2f92212b | 1394 | return REG_REQ_IGNORE; |
84fa4f43 JB |
1395 | } |
1396 | ||
b2e253cf LR |
1397 | static void reg_set_request_processed(void) |
1398 | { | |
1399 | bool need_more_processing = false; | |
c492db37 | 1400 | struct regulatory_request *lr = get_last_request(); |
b2e253cf | 1401 | |
c492db37 | 1402 | lr->processed = true; |
b2e253cf LR |
1403 | |
1404 | spin_lock(®_requests_lock); | |
1405 | if (!list_empty(®_requests_list)) | |
1406 | need_more_processing = true; | |
1407 | spin_unlock(®_requests_lock); | |
1408 | ||
c492db37 | 1409 | if (lr->initiator == NL80211_REGDOM_SET_BY_USER) |
fe20b39e | 1410 | cancel_delayed_work(®_timeout); |
a90c7a31 | 1411 | |
b2e253cf LR |
1412 | if (need_more_processing) |
1413 | schedule_work(®_work); | |
1414 | } | |
1415 | ||
b3eb7f3f LR |
1416 | /** |
1417 | * reg_process_hint_core - process core regulatory requests | |
1418 | * @pending_request: a pending core regulatory request | |
1419 | * | |
1420 | * The wireless subsystem can use this function to process | |
1421 | * a regulatory request issued by the regulatory core. | |
1422 | * | |
1423 | * Returns one of the different reg request treatment values. | |
1424 | */ | |
1425 | static enum reg_request_treatment | |
1426 | reg_process_hint_core(struct regulatory_request *core_request) | |
1427 | { | |
1428 | struct regulatory_request *lr; | |
1429 | ||
1430 | lr = get_last_request(); | |
1431 | if (lr != &core_request_world && lr) | |
1432 | kfree_rcu(lr, rcu_head); | |
1433 | ||
1434 | core_request->intersect = false; | |
1435 | core_request->processed = false; | |
1436 | rcu_assign_pointer(last_request, core_request); | |
1437 | ||
1438 | if (call_crda(core_request->alpha2)) | |
1439 | return REG_REQ_IGNORE; | |
1440 | return REG_REQ_OK; | |
1441 | } | |
1442 | ||
0d97a619 LR |
1443 | static enum reg_request_treatment |
1444 | __reg_process_hint_user(struct regulatory_request *user_request) | |
1445 | { | |
1446 | struct regulatory_request *lr = get_last_request(); | |
1447 | ||
1448 | if (reg_request_cell_base(user_request)) | |
1449 | return reg_ignore_cell_hint(user_request); | |
1450 | ||
1451 | if (reg_request_cell_base(lr)) | |
1452 | return REG_REQ_IGNORE; | |
1453 | ||
1454 | if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) | |
1455 | return REG_REQ_INTERSECT; | |
1456 | /* | |
1457 | * If the user knows better the user should set the regdom | |
1458 | * to their country before the IE is picked up | |
1459 | */ | |
1460 | if (lr->initiator == NL80211_REGDOM_SET_BY_USER && | |
1461 | lr->intersect) | |
1462 | return REG_REQ_IGNORE; | |
1463 | /* | |
1464 | * Process user requests only after previous user/driver/core | |
1465 | * requests have been processed | |
1466 | */ | |
1467 | if ((lr->initiator == NL80211_REGDOM_SET_BY_CORE || | |
1468 | lr->initiator == NL80211_REGDOM_SET_BY_DRIVER || | |
1469 | lr->initiator == NL80211_REGDOM_SET_BY_USER) && | |
1470 | regdom_changes(lr->alpha2)) | |
1471 | return REG_REQ_IGNORE; | |
1472 | ||
1473 | if (!regdom_changes(user_request->alpha2)) | |
1474 | return REG_REQ_ALREADY_SET; | |
1475 | ||
1476 | return REG_REQ_OK; | |
1477 | } | |
1478 | ||
1479 | /** | |
1480 | * reg_process_hint_user - process user regulatory requests | |
1481 | * @user_request: a pending user regulatory request | |
1482 | * | |
1483 | * The wireless subsystem can use this function to process | |
1484 | * a regulatory request initiated by userspace. | |
1485 | * | |
1486 | * Returns one of the different reg request treatment values. | |
1487 | */ | |
1488 | static enum reg_request_treatment | |
1489 | reg_process_hint_user(struct regulatory_request *user_request) | |
1490 | { | |
1491 | enum reg_request_treatment treatment; | |
1492 | struct regulatory_request *lr; | |
1493 | ||
1494 | treatment = __reg_process_hint_user(user_request); | |
1495 | if (treatment == REG_REQ_IGNORE || | |
1496 | treatment == REG_REQ_ALREADY_SET) { | |
1497 | kfree(user_request); | |
1498 | return treatment; | |
1499 | } | |
1500 | ||
1501 | lr = get_last_request(); | |
1502 | if (lr != &core_request_world && lr) | |
1503 | kfree_rcu(lr, rcu_head); | |
1504 | ||
1505 | user_request->intersect = treatment == REG_REQ_INTERSECT; | |
1506 | user_request->processed = false; | |
1507 | rcu_assign_pointer(last_request, user_request); | |
1508 | ||
1509 | user_alpha2[0] = user_request->alpha2[0]; | |
1510 | user_alpha2[1] = user_request->alpha2[1]; | |
1511 | ||
1512 | if (call_crda(user_request->alpha2)) | |
1513 | return REG_REQ_IGNORE; | |
1514 | return REG_REQ_OK; | |
1515 | } | |
1516 | ||
d1c96a9a LR |
1517 | /** |
1518 | * __regulatory_hint - hint to the wireless core a regulatory domain | |
1519 | * @wiphy: if the hint comes from country information from an AP, this | |
1520 | * is required to be set to the wiphy that received the information | |
28da32d7 | 1521 | * @pending_request: the regulatory request currently being processed |
d1c96a9a LR |
1522 | * |
1523 | * The Wireless subsystem can use this function to hint to the wireless core | |
28da32d7 | 1524 | * what it believes should be the current regulatory domain. |
d1c96a9a | 1525 | * |
2f92212b | 1526 | * Returns one of the different reg request treatment values. |
d1c96a9a | 1527 | */ |
2f92212b JB |
1528 | static enum reg_request_treatment |
1529 | __regulatory_hint(struct wiphy *wiphy, | |
1530 | struct regulatory_request *pending_request) | |
b2e1b302 | 1531 | { |
e9763c3c | 1532 | const struct ieee80211_regdomain *regd; |
9c96477d | 1533 | bool intersect = false; |
2f92212b | 1534 | enum reg_request_treatment treatment; |
c492db37 | 1535 | struct regulatory_request *lr; |
761cf7ec | 1536 | |
2f92212b | 1537 | treatment = get_reg_request_treatment(wiphy, pending_request); |
9c96477d | 1538 | |
2f92212b JB |
1539 | switch (treatment) { |
1540 | case REG_REQ_INTERSECT: | |
7db90f4a LR |
1541 | if (pending_request->initiator == |
1542 | NL80211_REGDOM_SET_BY_DRIVER) { | |
458f4f9e | 1543 | regd = reg_copy_regd(get_cfg80211_regdom()); |
e9763c3c | 1544 | if (IS_ERR(regd)) { |
d951c1dd | 1545 | kfree(pending_request); |
e9763c3c | 1546 | return PTR_ERR(regd); |
d951c1dd | 1547 | } |
458f4f9e | 1548 | rcu_assign_pointer(wiphy->regd, regd); |
3e0c3ff3 | 1549 | } |
9c96477d | 1550 | intersect = true; |
2f92212b JB |
1551 | break; |
1552 | case REG_REQ_OK: | |
1553 | break; | |
1554 | default: | |
fb1fc7ad LR |
1555 | /* |
1556 | * If the regulatory domain being requested by the | |
3e0c3ff3 | 1557 | * driver has already been set just copy it to the |
fb1fc7ad LR |
1558 | * wiphy |
1559 | */ | |
2f92212b JB |
1560 | if (treatment == REG_REQ_ALREADY_SET && |
1561 | pending_request->initiator == NL80211_REGDOM_SET_BY_DRIVER) { | |
458f4f9e | 1562 | regd = reg_copy_regd(get_cfg80211_regdom()); |
e9763c3c | 1563 | if (IS_ERR(regd)) { |
d951c1dd | 1564 | kfree(pending_request); |
2f92212b | 1565 | return REG_REQ_IGNORE; |
d951c1dd | 1566 | } |
2f92212b | 1567 | treatment = REG_REQ_ALREADY_SET; |
458f4f9e | 1568 | rcu_assign_pointer(wiphy->regd, regd); |
3e0c3ff3 LR |
1569 | goto new_request; |
1570 | } | |
d951c1dd | 1571 | kfree(pending_request); |
2f92212b | 1572 | return treatment; |
3e0c3ff3 | 1573 | } |
b2e1b302 | 1574 | |
3e0c3ff3 | 1575 | new_request: |
c492db37 JB |
1576 | lr = get_last_request(); |
1577 | if (lr != &core_request_world && lr) | |
1578 | kfree_rcu(lr, rcu_head); | |
5203cdb6 | 1579 | |
c492db37 JB |
1580 | pending_request->intersect = intersect; |
1581 | pending_request->processed = false; | |
1582 | rcu_assign_pointer(last_request, pending_request); | |
1583 | lr = pending_request; | |
5203cdb6 | 1584 | |
d951c1dd | 1585 | pending_request = NULL; |
3e0c3ff3 | 1586 | |
c492db37 JB |
1587 | if (lr->initiator == NL80211_REGDOM_SET_BY_USER) { |
1588 | user_alpha2[0] = lr->alpha2[0]; | |
1589 | user_alpha2[1] = lr->alpha2[1]; | |
09d989d1 LR |
1590 | } |
1591 | ||
2f92212b JB |
1592 | /* When r == REG_REQ_INTERSECT we do need to call CRDA */ |
1593 | if (treatment != REG_REQ_OK && treatment != REG_REQ_INTERSECT) { | |
73d54c9e LR |
1594 | /* |
1595 | * Since CRDA will not be called in this case as we already | |
1596 | * have applied the requested regulatory domain before we just | |
1597 | * inform userspace we have processed the request | |
1598 | */ | |
2f92212b | 1599 | if (treatment == REG_REQ_ALREADY_SET) { |
c492db37 | 1600 | nl80211_send_reg_change_event(lr); |
b2e253cf LR |
1601 | reg_set_request_processed(); |
1602 | } | |
2f92212b | 1603 | return treatment; |
73d54c9e | 1604 | } |
3e0c3ff3 | 1605 | |
c492db37 | 1606 | if (call_crda(lr->alpha2)) |
2f92212b JB |
1607 | return REG_REQ_IGNORE; |
1608 | return REG_REQ_OK; | |
b2e1b302 LR |
1609 | } |
1610 | ||
30a548c7 | 1611 | /* This processes *all* regulatory hints */ |
1daa37c7 | 1612 | static void reg_process_hint(struct regulatory_request *reg_request) |
fe33eb39 | 1613 | { |
fe33eb39 | 1614 | struct wiphy *wiphy = NULL; |
b3eb7f3f | 1615 | enum reg_request_treatment treatment; |
fe33eb39 | 1616 | |
fdc9d7b2 JB |
1617 | if (WARN_ON(!reg_request->alpha2)) |
1618 | return; | |
fe33eb39 | 1619 | |
f4173766 | 1620 | if (reg_request->wiphy_idx != WIPHY_IDX_INVALID) |
fe33eb39 LR |
1621 | wiphy = wiphy_idx_to_wiphy(reg_request->wiphy_idx); |
1622 | ||
1daa37c7 | 1623 | if (reg_request->initiator == NL80211_REGDOM_SET_BY_DRIVER && !wiphy) { |
d951c1dd | 1624 | kfree(reg_request); |
b0e2880b | 1625 | return; |
fe33eb39 LR |
1626 | } |
1627 | ||
b3eb7f3f LR |
1628 | switch (reg_request->initiator) { |
1629 | case NL80211_REGDOM_SET_BY_CORE: | |
1630 | reg_process_hint_core(reg_request); | |
1631 | return; | |
1632 | case NL80211_REGDOM_SET_BY_USER: | |
0d97a619 LR |
1633 | treatment = reg_process_hint_user(reg_request); |
1634 | if (treatment == REG_REQ_OK || | |
1635 | treatment == REG_REQ_ALREADY_SET) | |
1636 | return; | |
1637 | schedule_delayed_work(®_timeout, msecs_to_jiffies(3142)); | |
1638 | return; | |
b3eb7f3f LR |
1639 | case NL80211_REGDOM_SET_BY_DRIVER: |
1640 | case NL80211_REGDOM_SET_BY_COUNTRY_IE: | |
1641 | treatment = __regulatory_hint(wiphy, reg_request); | |
1642 | break; | |
1643 | default: | |
1644 | WARN(1, "invalid initiator %d\n", reg_request->initiator); | |
1645 | return; | |
1646 | } | |
1647 | ||
1648 | switch (treatment) { | |
2f92212b JB |
1649 | case REG_REQ_ALREADY_SET: |
1650 | /* This is required so that the orig_* parameters are saved */ | |
1651 | if (wiphy && wiphy->flags & WIPHY_FLAG_STRICT_REGULATORY) | |
1daa37c7 | 1652 | wiphy_update_regulatory(wiphy, reg_request->initiator); |
2f92212b JB |
1653 | break; |
1654 | default: | |
2f92212b | 1655 | break; |
a90c7a31 | 1656 | } |
fe33eb39 LR |
1657 | } |
1658 | ||
b2e253cf LR |
1659 | /* |
1660 | * Processes regulatory hints, this is all the NL80211_REGDOM_SET_BY_* | |
1661 | * Regulatory hints come on a first come first serve basis and we | |
1662 | * must process each one atomically. | |
1663 | */ | |
fe33eb39 | 1664 | static void reg_process_pending_hints(void) |
b0e2880b | 1665 | { |
c492db37 | 1666 | struct regulatory_request *reg_request, *lr; |
fe33eb39 | 1667 | |
c492db37 | 1668 | lr = get_last_request(); |
b0e2880b | 1669 | |
b2e253cf | 1670 | /* When last_request->processed becomes true this will be rescheduled */ |
c492db37 | 1671 | if (lr && !lr->processed) { |
1a919318 | 1672 | REG_DBG_PRINT("Pending regulatory request, waiting for it to be processed...\n"); |
5fe231e8 | 1673 | return; |
b2e253cf LR |
1674 | } |
1675 | ||
fe33eb39 | 1676 | spin_lock(®_requests_lock); |
fe33eb39 | 1677 | |
b2e253cf | 1678 | if (list_empty(®_requests_list)) { |
d951c1dd | 1679 | spin_unlock(®_requests_lock); |
5fe231e8 | 1680 | return; |
fe33eb39 | 1681 | } |
b2e253cf LR |
1682 | |
1683 | reg_request = list_first_entry(®_requests_list, | |
1684 | struct regulatory_request, | |
1685 | list); | |
1686 | list_del_init(®_request->list); | |
1687 | ||
fe33eb39 | 1688 | spin_unlock(®_requests_lock); |
b0e2880b | 1689 | |
1daa37c7 | 1690 | reg_process_hint(reg_request); |
fe33eb39 LR |
1691 | } |
1692 | ||
e38f8a7a LR |
1693 | /* Processes beacon hints -- this has nothing to do with country IEs */ |
1694 | static void reg_process_pending_beacon_hints(void) | |
1695 | { | |
79c97e97 | 1696 | struct cfg80211_registered_device *rdev; |
e38f8a7a LR |
1697 | struct reg_beacon *pending_beacon, *tmp; |
1698 | ||
e38f8a7a LR |
1699 | /* This goes through the _pending_ beacon list */ |
1700 | spin_lock_bh(®_pending_beacons_lock); | |
1701 | ||
e38f8a7a LR |
1702 | list_for_each_entry_safe(pending_beacon, tmp, |
1703 | ®_pending_beacons, list) { | |
e38f8a7a LR |
1704 | list_del_init(&pending_beacon->list); |
1705 | ||
1706 | /* Applies the beacon hint to current wiphys */ | |
79c97e97 JB |
1707 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) |
1708 | wiphy_update_new_beacon(&rdev->wiphy, pending_beacon); | |
e38f8a7a LR |
1709 | |
1710 | /* Remembers the beacon hint for new wiphys or reg changes */ | |
1711 | list_add_tail(&pending_beacon->list, ®_beacon_list); | |
1712 | } | |
1713 | ||
1714 | spin_unlock_bh(®_pending_beacons_lock); | |
e38f8a7a LR |
1715 | } |
1716 | ||
fe33eb39 LR |
1717 | static void reg_todo(struct work_struct *work) |
1718 | { | |
5fe231e8 | 1719 | rtnl_lock(); |
fe33eb39 | 1720 | reg_process_pending_hints(); |
e38f8a7a | 1721 | reg_process_pending_beacon_hints(); |
5fe231e8 | 1722 | rtnl_unlock(); |
fe33eb39 LR |
1723 | } |
1724 | ||
fe33eb39 LR |
1725 | static void queue_regulatory_request(struct regulatory_request *request) |
1726 | { | |
d4f2c881 JB |
1727 | request->alpha2[0] = toupper(request->alpha2[0]); |
1728 | request->alpha2[1] = toupper(request->alpha2[1]); | |
c61029c7 | 1729 | |
fe33eb39 LR |
1730 | spin_lock(®_requests_lock); |
1731 | list_add_tail(&request->list, ®_requests_list); | |
1732 | spin_unlock(®_requests_lock); | |
1733 | ||
1734 | schedule_work(®_work); | |
1735 | } | |
1736 | ||
09d989d1 LR |
1737 | /* |
1738 | * Core regulatory hint -- happens during cfg80211_init() | |
1739 | * and when we restore regulatory settings. | |
1740 | */ | |
ba25c141 LR |
1741 | static int regulatory_hint_core(const char *alpha2) |
1742 | { | |
1743 | struct regulatory_request *request; | |
1744 | ||
1a919318 | 1745 | request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); |
ba25c141 LR |
1746 | if (!request) |
1747 | return -ENOMEM; | |
1748 | ||
1749 | request->alpha2[0] = alpha2[0]; | |
1750 | request->alpha2[1] = alpha2[1]; | |
7db90f4a | 1751 | request->initiator = NL80211_REGDOM_SET_BY_CORE; |
ba25c141 | 1752 | |
31e99729 | 1753 | queue_regulatory_request(request); |
5078b2e3 | 1754 | |
fe33eb39 | 1755 | return 0; |
ba25c141 LR |
1756 | } |
1757 | ||
fe33eb39 | 1758 | /* User hints */ |
57b5ce07 LR |
1759 | int regulatory_hint_user(const char *alpha2, |
1760 | enum nl80211_user_reg_hint_type user_reg_hint_type) | |
b2e1b302 | 1761 | { |
fe33eb39 LR |
1762 | struct regulatory_request *request; |
1763 | ||
fdc9d7b2 JB |
1764 | if (WARN_ON(!alpha2)) |
1765 | return -EINVAL; | |
b2e1b302 | 1766 | |
fe33eb39 LR |
1767 | request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); |
1768 | if (!request) | |
1769 | return -ENOMEM; | |
1770 | ||
f4173766 | 1771 | request->wiphy_idx = WIPHY_IDX_INVALID; |
fe33eb39 LR |
1772 | request->alpha2[0] = alpha2[0]; |
1773 | request->alpha2[1] = alpha2[1]; | |
e12822e1 | 1774 | request->initiator = NL80211_REGDOM_SET_BY_USER; |
57b5ce07 | 1775 | request->user_reg_hint_type = user_reg_hint_type; |
fe33eb39 LR |
1776 | |
1777 | queue_regulatory_request(request); | |
1778 | ||
1779 | return 0; | |
1780 | } | |
1781 | ||
1782 | /* Driver hints */ | |
1783 | int regulatory_hint(struct wiphy *wiphy, const char *alpha2) | |
1784 | { | |
1785 | struct regulatory_request *request; | |
1786 | ||
fdc9d7b2 JB |
1787 | if (WARN_ON(!alpha2 || !wiphy)) |
1788 | return -EINVAL; | |
fe33eb39 LR |
1789 | |
1790 | request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); | |
1791 | if (!request) | |
1792 | return -ENOMEM; | |
1793 | ||
1794 | request->wiphy_idx = get_wiphy_idx(wiphy); | |
1795 | ||
fe33eb39 LR |
1796 | request->alpha2[0] = alpha2[0]; |
1797 | request->alpha2[1] = alpha2[1]; | |
7db90f4a | 1798 | request->initiator = NL80211_REGDOM_SET_BY_DRIVER; |
fe33eb39 LR |
1799 | |
1800 | queue_regulatory_request(request); | |
1801 | ||
1802 | return 0; | |
b2e1b302 LR |
1803 | } |
1804 | EXPORT_SYMBOL(regulatory_hint); | |
1805 | ||
789fd033 LR |
1806 | void regulatory_hint_country_ie(struct wiphy *wiphy, enum ieee80211_band band, |
1807 | const u8 *country_ie, u8 country_ie_len) | |
3f2355cb | 1808 | { |
3f2355cb | 1809 | char alpha2[2]; |
3f2355cb | 1810 | enum environment_cap env = ENVIRON_ANY; |
db2424c5 | 1811 | struct regulatory_request *request = NULL, *lr; |
d335fe63 | 1812 | |
3f2355cb LR |
1813 | /* IE len must be evenly divisible by 2 */ |
1814 | if (country_ie_len & 0x01) | |
db2424c5 | 1815 | return; |
3f2355cb LR |
1816 | |
1817 | if (country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN) | |
db2424c5 JB |
1818 | return; |
1819 | ||
1820 | request = kzalloc(sizeof(*request), GFP_KERNEL); | |
1821 | if (!request) | |
1822 | return; | |
3f2355cb | 1823 | |
3f2355cb LR |
1824 | alpha2[0] = country_ie[0]; |
1825 | alpha2[1] = country_ie[1]; | |
1826 | ||
1827 | if (country_ie[2] == 'I') | |
1828 | env = ENVIRON_INDOOR; | |
1829 | else if (country_ie[2] == 'O') | |
1830 | env = ENVIRON_OUTDOOR; | |
1831 | ||
db2424c5 JB |
1832 | rcu_read_lock(); |
1833 | lr = get_last_request(); | |
1834 | ||
1835 | if (unlikely(!lr)) | |
1836 | goto out; | |
1837 | ||
fb1fc7ad | 1838 | /* |
8b19e6ca | 1839 | * We will run this only upon a successful connection on cfg80211. |
4b44c8bc | 1840 | * We leave conflict resolution to the workqueue, where can hold |
5fe231e8 | 1841 | * the RTNL. |
fb1fc7ad | 1842 | */ |
c492db37 JB |
1843 | if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE && |
1844 | lr->wiphy_idx != WIPHY_IDX_INVALID) | |
4b44c8bc | 1845 | goto out; |
3f2355cb | 1846 | |
fe33eb39 | 1847 | request->wiphy_idx = get_wiphy_idx(wiphy); |
4f366c5d JL |
1848 | request->alpha2[0] = alpha2[0]; |
1849 | request->alpha2[1] = alpha2[1]; | |
7db90f4a | 1850 | request->initiator = NL80211_REGDOM_SET_BY_COUNTRY_IE; |
fe33eb39 LR |
1851 | request->country_ie_env = env; |
1852 | ||
fe33eb39 | 1853 | queue_regulatory_request(request); |
db2424c5 | 1854 | request = NULL; |
3f2355cb | 1855 | out: |
db2424c5 JB |
1856 | kfree(request); |
1857 | rcu_read_unlock(); | |
3f2355cb | 1858 | } |
b2e1b302 | 1859 | |
09d989d1 LR |
1860 | static void restore_alpha2(char *alpha2, bool reset_user) |
1861 | { | |
1862 | /* indicates there is no alpha2 to consider for restoration */ | |
1863 | alpha2[0] = '9'; | |
1864 | alpha2[1] = '7'; | |
1865 | ||
1866 | /* The user setting has precedence over the module parameter */ | |
1867 | if (is_user_regdom_saved()) { | |
1868 | /* Unless we're asked to ignore it and reset it */ | |
1869 | if (reset_user) { | |
1a919318 | 1870 | REG_DBG_PRINT("Restoring regulatory settings including user preference\n"); |
09d989d1 LR |
1871 | user_alpha2[0] = '9'; |
1872 | user_alpha2[1] = '7'; | |
1873 | ||
1874 | /* | |
1875 | * If we're ignoring user settings, we still need to | |
1876 | * check the module parameter to ensure we put things | |
1877 | * back as they were for a full restore. | |
1878 | */ | |
1879 | if (!is_world_regdom(ieee80211_regdom)) { | |
1a919318 JB |
1880 | REG_DBG_PRINT("Keeping preference on module parameter ieee80211_regdom: %c%c\n", |
1881 | ieee80211_regdom[0], ieee80211_regdom[1]); | |
09d989d1 LR |
1882 | alpha2[0] = ieee80211_regdom[0]; |
1883 | alpha2[1] = ieee80211_regdom[1]; | |
1884 | } | |
1885 | } else { | |
1a919318 JB |
1886 | REG_DBG_PRINT("Restoring regulatory settings while preserving user preference for: %c%c\n", |
1887 | user_alpha2[0], user_alpha2[1]); | |
09d989d1 LR |
1888 | alpha2[0] = user_alpha2[0]; |
1889 | alpha2[1] = user_alpha2[1]; | |
1890 | } | |
1891 | } else if (!is_world_regdom(ieee80211_regdom)) { | |
1a919318 JB |
1892 | REG_DBG_PRINT("Keeping preference on module parameter ieee80211_regdom: %c%c\n", |
1893 | ieee80211_regdom[0], ieee80211_regdom[1]); | |
09d989d1 LR |
1894 | alpha2[0] = ieee80211_regdom[0]; |
1895 | alpha2[1] = ieee80211_regdom[1]; | |
1896 | } else | |
d91e41b6 | 1897 | REG_DBG_PRINT("Restoring regulatory settings\n"); |
09d989d1 LR |
1898 | } |
1899 | ||
5ce543d1 RM |
1900 | static void restore_custom_reg_settings(struct wiphy *wiphy) |
1901 | { | |
1902 | struct ieee80211_supported_band *sband; | |
1903 | enum ieee80211_band band; | |
1904 | struct ieee80211_channel *chan; | |
1905 | int i; | |
1906 | ||
1907 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) { | |
1908 | sband = wiphy->bands[band]; | |
1909 | if (!sband) | |
1910 | continue; | |
1911 | for (i = 0; i < sband->n_channels; i++) { | |
1912 | chan = &sband->channels[i]; | |
1913 | chan->flags = chan->orig_flags; | |
1914 | chan->max_antenna_gain = chan->orig_mag; | |
1915 | chan->max_power = chan->orig_mpwr; | |
899852af | 1916 | chan->beacon_found = false; |
5ce543d1 RM |
1917 | } |
1918 | } | |
1919 | } | |
1920 | ||
09d989d1 LR |
1921 | /* |
1922 | * Restoring regulatory settings involves ingoring any | |
1923 | * possibly stale country IE information and user regulatory | |
1924 | * settings if so desired, this includes any beacon hints | |
1925 | * learned as we could have traveled outside to another country | |
1926 | * after disconnection. To restore regulatory settings we do | |
1927 | * exactly what we did at bootup: | |
1928 | * | |
1929 | * - send a core regulatory hint | |
1930 | * - send a user regulatory hint if applicable | |
1931 | * | |
1932 | * Device drivers that send a regulatory hint for a specific country | |
1933 | * keep their own regulatory domain on wiphy->regd so that does does | |
1934 | * not need to be remembered. | |
1935 | */ | |
1936 | static void restore_regulatory_settings(bool reset_user) | |
1937 | { | |
1938 | char alpha2[2]; | |
cee0bec5 | 1939 | char world_alpha2[2]; |
09d989d1 | 1940 | struct reg_beacon *reg_beacon, *btmp; |
14609555 LR |
1941 | struct regulatory_request *reg_request, *tmp; |
1942 | LIST_HEAD(tmp_reg_req_list); | |
5ce543d1 | 1943 | struct cfg80211_registered_device *rdev; |
09d989d1 | 1944 | |
5fe231e8 JB |
1945 | ASSERT_RTNL(); |
1946 | ||
2d319867 | 1947 | reset_regdomains(true, &world_regdom); |
09d989d1 LR |
1948 | restore_alpha2(alpha2, reset_user); |
1949 | ||
14609555 LR |
1950 | /* |
1951 | * If there's any pending requests we simply | |
1952 | * stash them to a temporary pending queue and | |
1953 | * add then after we've restored regulatory | |
1954 | * settings. | |
1955 | */ | |
1956 | spin_lock(®_requests_lock); | |
fea9bced JB |
1957 | list_for_each_entry_safe(reg_request, tmp, ®_requests_list, list) { |
1958 | if (reg_request->initiator != NL80211_REGDOM_SET_BY_USER) | |
1959 | continue; | |
1960 | list_move_tail(®_request->list, &tmp_reg_req_list); | |
14609555 LR |
1961 | } |
1962 | spin_unlock(®_requests_lock); | |
1963 | ||
09d989d1 LR |
1964 | /* Clear beacon hints */ |
1965 | spin_lock_bh(®_pending_beacons_lock); | |
fea9bced JB |
1966 | list_for_each_entry_safe(reg_beacon, btmp, ®_pending_beacons, list) { |
1967 | list_del(®_beacon->list); | |
1968 | kfree(reg_beacon); | |
09d989d1 LR |
1969 | } |
1970 | spin_unlock_bh(®_pending_beacons_lock); | |
1971 | ||
fea9bced JB |
1972 | list_for_each_entry_safe(reg_beacon, btmp, ®_beacon_list, list) { |
1973 | list_del(®_beacon->list); | |
1974 | kfree(reg_beacon); | |
09d989d1 LR |
1975 | } |
1976 | ||
1977 | /* First restore to the basic regulatory settings */ | |
379b82f4 JB |
1978 | world_alpha2[0] = cfg80211_world_regdom->alpha2[0]; |
1979 | world_alpha2[1] = cfg80211_world_regdom->alpha2[1]; | |
09d989d1 | 1980 | |
5ce543d1 RM |
1981 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) { |
1982 | if (rdev->wiphy.flags & WIPHY_FLAG_CUSTOM_REGULATORY) | |
1983 | restore_custom_reg_settings(&rdev->wiphy); | |
1984 | } | |
1985 | ||
cee0bec5 | 1986 | regulatory_hint_core(world_alpha2); |
09d989d1 LR |
1987 | |
1988 | /* | |
1989 | * This restores the ieee80211_regdom module parameter | |
1990 | * preference or the last user requested regulatory | |
1991 | * settings, user regulatory settings takes precedence. | |
1992 | */ | |
1993 | if (is_an_alpha2(alpha2)) | |
57b5ce07 | 1994 | regulatory_hint_user(user_alpha2, NL80211_USER_REG_HINT_USER); |
09d989d1 | 1995 | |
14609555 | 1996 | spin_lock(®_requests_lock); |
11cff96c | 1997 | list_splice_tail_init(&tmp_reg_req_list, ®_requests_list); |
14609555 LR |
1998 | spin_unlock(®_requests_lock); |
1999 | ||
14609555 LR |
2000 | REG_DBG_PRINT("Kicking the queue\n"); |
2001 | ||
2002 | schedule_work(®_work); | |
2003 | } | |
09d989d1 LR |
2004 | |
2005 | void regulatory_hint_disconnect(void) | |
2006 | { | |
1a919318 | 2007 | REG_DBG_PRINT("All devices are disconnected, going to restore regulatory settings\n"); |
09d989d1 LR |
2008 | restore_regulatory_settings(false); |
2009 | } | |
2010 | ||
e38f8a7a LR |
2011 | static bool freq_is_chan_12_13_14(u16 freq) |
2012 | { | |
59eb21a6 BR |
2013 | if (freq == ieee80211_channel_to_frequency(12, IEEE80211_BAND_2GHZ) || |
2014 | freq == ieee80211_channel_to_frequency(13, IEEE80211_BAND_2GHZ) || | |
2015 | freq == ieee80211_channel_to_frequency(14, IEEE80211_BAND_2GHZ)) | |
e38f8a7a LR |
2016 | return true; |
2017 | return false; | |
2018 | } | |
2019 | ||
3ebfa6e7 LR |
2020 | static bool pending_reg_beacon(struct ieee80211_channel *beacon_chan) |
2021 | { | |
2022 | struct reg_beacon *pending_beacon; | |
2023 | ||
2024 | list_for_each_entry(pending_beacon, ®_pending_beacons, list) | |
2025 | if (beacon_chan->center_freq == | |
2026 | pending_beacon->chan.center_freq) | |
2027 | return true; | |
2028 | return false; | |
2029 | } | |
2030 | ||
e38f8a7a LR |
2031 | int regulatory_hint_found_beacon(struct wiphy *wiphy, |
2032 | struct ieee80211_channel *beacon_chan, | |
2033 | gfp_t gfp) | |
2034 | { | |
2035 | struct reg_beacon *reg_beacon; | |
3ebfa6e7 | 2036 | bool processing; |
e38f8a7a | 2037 | |
1a919318 JB |
2038 | if (beacon_chan->beacon_found || |
2039 | beacon_chan->flags & IEEE80211_CHAN_RADAR || | |
e38f8a7a | 2040 | (beacon_chan->band == IEEE80211_BAND_2GHZ && |
1a919318 | 2041 | !freq_is_chan_12_13_14(beacon_chan->center_freq))) |
e38f8a7a LR |
2042 | return 0; |
2043 | ||
3ebfa6e7 LR |
2044 | spin_lock_bh(®_pending_beacons_lock); |
2045 | processing = pending_reg_beacon(beacon_chan); | |
2046 | spin_unlock_bh(®_pending_beacons_lock); | |
2047 | ||
2048 | if (processing) | |
e38f8a7a LR |
2049 | return 0; |
2050 | ||
2051 | reg_beacon = kzalloc(sizeof(struct reg_beacon), gfp); | |
2052 | if (!reg_beacon) | |
2053 | return -ENOMEM; | |
2054 | ||
1a919318 | 2055 | REG_DBG_PRINT("Found new beacon on frequency: %d MHz (Ch %d) on %s\n", |
4113f751 LR |
2056 | beacon_chan->center_freq, |
2057 | ieee80211_frequency_to_channel(beacon_chan->center_freq), | |
2058 | wiphy_name(wiphy)); | |
2059 | ||
e38f8a7a | 2060 | memcpy(®_beacon->chan, beacon_chan, |
1a919318 | 2061 | sizeof(struct ieee80211_channel)); |
e38f8a7a LR |
2062 | |
2063 | /* | |
2064 | * Since we can be called from BH or and non-BH context | |
2065 | * we must use spin_lock_bh() | |
2066 | */ | |
2067 | spin_lock_bh(®_pending_beacons_lock); | |
2068 | list_add_tail(®_beacon->list, ®_pending_beacons); | |
2069 | spin_unlock_bh(®_pending_beacons_lock); | |
2070 | ||
2071 | schedule_work(®_work); | |
2072 | ||
2073 | return 0; | |
2074 | } | |
2075 | ||
a3d2eaf0 | 2076 | static void print_rd_rules(const struct ieee80211_regdomain *rd) |
b2e1b302 LR |
2077 | { |
2078 | unsigned int i; | |
a3d2eaf0 JB |
2079 | const struct ieee80211_reg_rule *reg_rule = NULL; |
2080 | const struct ieee80211_freq_range *freq_range = NULL; | |
2081 | const struct ieee80211_power_rule *power_rule = NULL; | |
b2e1b302 | 2082 | |
6653325a | 2083 | pr_info(" (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)\n"); |
b2e1b302 LR |
2084 | |
2085 | for (i = 0; i < rd->n_reg_rules; i++) { | |
2086 | reg_rule = &rd->reg_rules[i]; | |
2087 | freq_range = ®_rule->freq_range; | |
2088 | power_rule = ®_rule->power_rule; | |
2089 | ||
fb1fc7ad LR |
2090 | /* |
2091 | * There may not be documentation for max antenna gain | |
2092 | * in certain regions | |
2093 | */ | |
b2e1b302 | 2094 | if (power_rule->max_antenna_gain) |
6653325a | 2095 | pr_info(" (%d KHz - %d KHz @ %d KHz), (%d mBi, %d mBm)\n", |
b2e1b302 LR |
2096 | freq_range->start_freq_khz, |
2097 | freq_range->end_freq_khz, | |
2098 | freq_range->max_bandwidth_khz, | |
2099 | power_rule->max_antenna_gain, | |
2100 | power_rule->max_eirp); | |
2101 | else | |
6653325a | 2102 | pr_info(" (%d KHz - %d KHz @ %d KHz), (N/A, %d mBm)\n", |
b2e1b302 LR |
2103 | freq_range->start_freq_khz, |
2104 | freq_range->end_freq_khz, | |
2105 | freq_range->max_bandwidth_khz, | |
2106 | power_rule->max_eirp); | |
2107 | } | |
2108 | } | |
2109 | ||
8b60b078 LR |
2110 | bool reg_supported_dfs_region(u8 dfs_region) |
2111 | { | |
2112 | switch (dfs_region) { | |
2113 | case NL80211_DFS_UNSET: | |
2114 | case NL80211_DFS_FCC: | |
2115 | case NL80211_DFS_ETSI: | |
2116 | case NL80211_DFS_JP: | |
2117 | return true; | |
2118 | default: | |
2119 | REG_DBG_PRINT("Ignoring uknown DFS master region: %d\n", | |
2120 | dfs_region); | |
2121 | return false; | |
2122 | } | |
2123 | } | |
2124 | ||
2125 | static void print_dfs_region(u8 dfs_region) | |
2126 | { | |
2127 | if (!dfs_region) | |
2128 | return; | |
2129 | ||
2130 | switch (dfs_region) { | |
2131 | case NL80211_DFS_FCC: | |
2132 | pr_info(" DFS Master region FCC"); | |
2133 | break; | |
2134 | case NL80211_DFS_ETSI: | |
2135 | pr_info(" DFS Master region ETSI"); | |
2136 | break; | |
2137 | case NL80211_DFS_JP: | |
2138 | pr_info(" DFS Master region JP"); | |
2139 | break; | |
2140 | default: | |
1a919318 | 2141 | pr_info(" DFS Master region Unknown"); |
8b60b078 LR |
2142 | break; |
2143 | } | |
2144 | } | |
2145 | ||
a3d2eaf0 | 2146 | static void print_regdomain(const struct ieee80211_regdomain *rd) |
b2e1b302 | 2147 | { |
c492db37 | 2148 | struct regulatory_request *lr = get_last_request(); |
b2e1b302 | 2149 | |
3f2355cb | 2150 | if (is_intersected_alpha2(rd->alpha2)) { |
c492db37 | 2151 | if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) { |
79c97e97 | 2152 | struct cfg80211_registered_device *rdev; |
c492db37 | 2153 | rdev = cfg80211_rdev_by_wiphy_idx(lr->wiphy_idx); |
79c97e97 | 2154 | if (rdev) { |
e9c0268f | 2155 | pr_info("Current regulatory domain updated by AP to: %c%c\n", |
79c97e97 JB |
2156 | rdev->country_ie_alpha2[0], |
2157 | rdev->country_ie_alpha2[1]); | |
3f2355cb | 2158 | } else |
e9c0268f | 2159 | pr_info("Current regulatory domain intersected:\n"); |
3f2355cb | 2160 | } else |
e9c0268f | 2161 | pr_info("Current regulatory domain intersected:\n"); |
1a919318 | 2162 | } else if (is_world_regdom(rd->alpha2)) { |
e9c0268f | 2163 | pr_info("World regulatory domain updated:\n"); |
1a919318 | 2164 | } else { |
b2e1b302 | 2165 | if (is_unknown_alpha2(rd->alpha2)) |
e9c0268f | 2166 | pr_info("Regulatory domain changed to driver built-in settings (unknown country)\n"); |
57b5ce07 | 2167 | else { |
c492db37 | 2168 | if (reg_request_cell_base(lr)) |
1a919318 | 2169 | pr_info("Regulatory domain changed to country: %c%c by Cell Station\n", |
57b5ce07 LR |
2170 | rd->alpha2[0], rd->alpha2[1]); |
2171 | else | |
1a919318 | 2172 | pr_info("Regulatory domain changed to country: %c%c\n", |
57b5ce07 LR |
2173 | rd->alpha2[0], rd->alpha2[1]); |
2174 | } | |
b2e1b302 | 2175 | } |
1a919318 | 2176 | |
8b60b078 | 2177 | print_dfs_region(rd->dfs_region); |
b2e1b302 LR |
2178 | print_rd_rules(rd); |
2179 | } | |
2180 | ||
2df78167 | 2181 | static void print_regdomain_info(const struct ieee80211_regdomain *rd) |
b2e1b302 | 2182 | { |
e9c0268f | 2183 | pr_info("Regulatory domain: %c%c\n", rd->alpha2[0], rd->alpha2[1]); |
b2e1b302 LR |
2184 | print_rd_rules(rd); |
2185 | } | |
2186 | ||
d2372b31 | 2187 | /* Takes ownership of rd only if it doesn't fail */ |
a3d2eaf0 | 2188 | static int __set_regdom(const struct ieee80211_regdomain *rd) |
b2e1b302 | 2189 | { |
e9763c3c | 2190 | const struct ieee80211_regdomain *regd; |
9c96477d | 2191 | const struct ieee80211_regdomain *intersected_rd = NULL; |
806a9e39 | 2192 | struct wiphy *request_wiphy; |
c492db37 | 2193 | struct regulatory_request *lr = get_last_request(); |
6913b49a | 2194 | |
b2e1b302 LR |
2195 | /* Some basic sanity checks first */ |
2196 | ||
6913b49a JB |
2197 | if (!reg_is_valid_request(rd->alpha2)) |
2198 | return -EINVAL; | |
2199 | ||
b2e1b302 | 2200 | if (is_world_regdom(rd->alpha2)) { |
b2e1b302 LR |
2201 | update_world_regdomain(rd); |
2202 | return 0; | |
2203 | } | |
b2e1b302 LR |
2204 | |
2205 | if (!is_alpha2_set(rd->alpha2) && !is_an_alpha2(rd->alpha2) && | |
1a919318 | 2206 | !is_unknown_alpha2(rd->alpha2)) |
b2e1b302 LR |
2207 | return -EINVAL; |
2208 | ||
fb1fc7ad LR |
2209 | /* |
2210 | * Lets only bother proceeding on the same alpha2 if the current | |
3f2355cb | 2211 | * rd is non static (it means CRDA was present and was used last) |
fb1fc7ad LR |
2212 | * and the pending request came in from a country IE |
2213 | */ | |
c492db37 | 2214 | if (lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE) { |
fb1fc7ad LR |
2215 | /* |
2216 | * If someone else asked us to change the rd lets only bother | |
2217 | * checking if the alpha2 changes if CRDA was already called | |
2218 | */ | |
baeb66fe | 2219 | if (!regdom_changes(rd->alpha2)) |
95908535 | 2220 | return -EALREADY; |
3f2355cb LR |
2221 | } |
2222 | ||
fb1fc7ad LR |
2223 | /* |
2224 | * Now lets set the regulatory domain, update all driver channels | |
b2e1b302 LR |
2225 | * and finally inform them of what we have done, in case they want |
2226 | * to review or adjust their own settings based on their own | |
fb1fc7ad LR |
2227 | * internal EEPROM data |
2228 | */ | |
b2e1b302 | 2229 | |
8375af3b | 2230 | if (!is_valid_rd(rd)) { |
e9c0268f | 2231 | pr_err("Invalid regulatory domain detected:\n"); |
8375af3b LR |
2232 | print_regdomain_info(rd); |
2233 | return -EINVAL; | |
b2e1b302 LR |
2234 | } |
2235 | ||
c492db37 | 2236 | request_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx); |
0bac71af | 2237 | if (!request_wiphy && |
c492db37 JB |
2238 | (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER || |
2239 | lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE)) { | |
0bac71af | 2240 | schedule_delayed_work(®_timeout, 0); |
de3584bd JB |
2241 | return -ENODEV; |
2242 | } | |
806a9e39 | 2243 | |
c492db37 JB |
2244 | if (!lr->intersect) { |
2245 | if (lr->initiator != NL80211_REGDOM_SET_BY_DRIVER) { | |
379b82f4 | 2246 | reset_regdomains(false, rd); |
3e0c3ff3 LR |
2247 | return 0; |
2248 | } | |
2249 | ||
fb1fc7ad LR |
2250 | /* |
2251 | * For a driver hint, lets copy the regulatory domain the | |
2252 | * driver wanted to the wiphy to deal with conflicts | |
2253 | */ | |
3e0c3ff3 | 2254 | |
558f6d32 LR |
2255 | /* |
2256 | * Userspace could have sent two replies with only | |
2257 | * one kernel request. | |
2258 | */ | |
2259 | if (request_wiphy->regd) | |
2260 | return -EALREADY; | |
3e0c3ff3 | 2261 | |
e9763c3c JB |
2262 | regd = reg_copy_regd(rd); |
2263 | if (IS_ERR(regd)) | |
2264 | return PTR_ERR(regd); | |
3e0c3ff3 | 2265 | |
458f4f9e | 2266 | rcu_assign_pointer(request_wiphy->regd, regd); |
379b82f4 | 2267 | reset_regdomains(false, rd); |
b8295acd LR |
2268 | return 0; |
2269 | } | |
2270 | ||
2271 | /* Intersection requires a bit more work */ | |
2272 | ||
c492db37 | 2273 | if (lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE) { |
458f4f9e | 2274 | intersected_rd = regdom_intersect(rd, get_cfg80211_regdom()); |
9c96477d LR |
2275 | if (!intersected_rd) |
2276 | return -EINVAL; | |
b8295acd | 2277 | |
fb1fc7ad LR |
2278 | /* |
2279 | * We can trash what CRDA provided now. | |
3e0c3ff3 | 2280 | * However if a driver requested this specific regulatory |
fb1fc7ad LR |
2281 | * domain we keep it for its private use |
2282 | */ | |
b7566fc3 LF |
2283 | if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER) { |
2284 | const struct ieee80211_regdomain *tmp; | |
2285 | ||
2286 | tmp = get_wiphy_regdom(request_wiphy); | |
458f4f9e | 2287 | rcu_assign_pointer(request_wiphy->regd, rd); |
b7566fc3 LF |
2288 | rcu_free_regdom(tmp); |
2289 | } else { | |
3e0c3ff3 | 2290 | kfree(rd); |
b7566fc3 | 2291 | } |
3e0c3ff3 | 2292 | |
b8295acd LR |
2293 | rd = NULL; |
2294 | ||
379b82f4 | 2295 | reset_regdomains(false, intersected_rd); |
b8295acd LR |
2296 | |
2297 | return 0; | |
9c96477d LR |
2298 | } |
2299 | ||
f3baed51 | 2300 | return -EINVAL; |
b2e1b302 LR |
2301 | } |
2302 | ||
2303 | ||
fb1fc7ad LR |
2304 | /* |
2305 | * Use this call to set the current regulatory domain. Conflicts with | |
b2e1b302 | 2306 | * multiple drivers can be ironed out later. Caller must've already |
458f4f9e | 2307 | * kmalloc'd the rd structure. |
fb1fc7ad | 2308 | */ |
a3d2eaf0 | 2309 | int set_regdom(const struct ieee80211_regdomain *rd) |
b2e1b302 | 2310 | { |
c492db37 | 2311 | struct regulatory_request *lr; |
b2e1b302 LR |
2312 | int r; |
2313 | ||
c492db37 | 2314 | lr = get_last_request(); |
abc7381b | 2315 | |
b2e1b302 LR |
2316 | /* Note that this doesn't update the wiphys, this is done below */ |
2317 | r = __set_regdom(rd); | |
d2372b31 | 2318 | if (r) { |
95908535 KV |
2319 | if (r == -EALREADY) |
2320 | reg_set_request_processed(); | |
2321 | ||
d2372b31 | 2322 | kfree(rd); |
38fd2143 | 2323 | return r; |
d2372b31 | 2324 | } |
b2e1b302 | 2325 | |
b2e1b302 | 2326 | /* This would make this whole thing pointless */ |
38fd2143 JB |
2327 | if (WARN_ON(!lr->intersect && rd != get_cfg80211_regdom())) |
2328 | return -EINVAL; | |
b2e1b302 LR |
2329 | |
2330 | /* update all wiphys now with the new established regulatory domain */ | |
c492db37 | 2331 | update_all_wiphy_regulatory(lr->initiator); |
b2e1b302 | 2332 | |
458f4f9e | 2333 | print_regdomain(get_cfg80211_regdom()); |
b2e1b302 | 2334 | |
c492db37 | 2335 | nl80211_send_reg_change_event(lr); |
73d54c9e | 2336 | |
b2e253cf LR |
2337 | reg_set_request_processed(); |
2338 | ||
38fd2143 | 2339 | return 0; |
b2e1b302 LR |
2340 | } |
2341 | ||
4d9d88d1 SJR |
2342 | int reg_device_uevent(struct device *dev, struct kobj_uevent_env *env) |
2343 | { | |
4a484cff JB |
2344 | struct regulatory_request *lr; |
2345 | u8 alpha2[2]; | |
2346 | bool add = false; | |
c492db37 | 2347 | |
4a484cff JB |
2348 | rcu_read_lock(); |
2349 | lr = get_last_request(); | |
c492db37 | 2350 | if (lr && !lr->processed) { |
4a484cff JB |
2351 | memcpy(alpha2, lr->alpha2, 2); |
2352 | add = true; | |
4d9d88d1 | 2353 | } |
4a484cff | 2354 | rcu_read_unlock(); |
4d9d88d1 | 2355 | |
4a484cff JB |
2356 | if (add) |
2357 | return add_uevent_var(env, "COUNTRY=%c%c", | |
2358 | alpha2[0], alpha2[1]); | |
4d9d88d1 SJR |
2359 | return 0; |
2360 | } | |
4d9d88d1 | 2361 | |
57b5ce07 LR |
2362 | void wiphy_regulatory_register(struct wiphy *wiphy) |
2363 | { | |
23df0b73 AN |
2364 | struct regulatory_request *lr; |
2365 | ||
57b5ce07 LR |
2366 | if (!reg_dev_ignore_cell_hint(wiphy)) |
2367 | reg_num_devs_support_basehint++; | |
2368 | ||
23df0b73 AN |
2369 | lr = get_last_request(); |
2370 | wiphy_update_regulatory(wiphy, lr->initiator); | |
57b5ce07 LR |
2371 | } |
2372 | ||
bfead080 | 2373 | void wiphy_regulatory_deregister(struct wiphy *wiphy) |
3f2355cb | 2374 | { |
0ad8acaf | 2375 | struct wiphy *request_wiphy = NULL; |
c492db37 | 2376 | struct regulatory_request *lr; |
761cf7ec | 2377 | |
c492db37 | 2378 | lr = get_last_request(); |
abc7381b | 2379 | |
57b5ce07 LR |
2380 | if (!reg_dev_ignore_cell_hint(wiphy)) |
2381 | reg_num_devs_support_basehint--; | |
2382 | ||
458f4f9e JB |
2383 | rcu_free_regdom(get_wiphy_regdom(wiphy)); |
2384 | rcu_assign_pointer(wiphy->regd, NULL); | |
0ef9ccdd | 2385 | |
c492db37 JB |
2386 | if (lr) |
2387 | request_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx); | |
806a9e39 | 2388 | |
0ef9ccdd | 2389 | if (!request_wiphy || request_wiphy != wiphy) |
38fd2143 | 2390 | return; |
0ef9ccdd | 2391 | |
c492db37 JB |
2392 | lr->wiphy_idx = WIPHY_IDX_INVALID; |
2393 | lr->country_ie_env = ENVIRON_ANY; | |
3f2355cb LR |
2394 | } |
2395 | ||
a90c7a31 LR |
2396 | static void reg_timeout_work(struct work_struct *work) |
2397 | { | |
1a919318 | 2398 | REG_DBG_PRINT("Timeout while waiting for CRDA to reply, restoring regulatory settings\n"); |
f77b86d7 | 2399 | rtnl_lock(); |
a90c7a31 | 2400 | restore_regulatory_settings(true); |
f77b86d7 | 2401 | rtnl_unlock(); |
a90c7a31 LR |
2402 | } |
2403 | ||
2fcc9f73 | 2404 | int __init regulatory_init(void) |
b2e1b302 | 2405 | { |
bcf4f99b | 2406 | int err = 0; |
734366de | 2407 | |
b2e1b302 LR |
2408 | reg_pdev = platform_device_register_simple("regulatory", 0, NULL, 0); |
2409 | if (IS_ERR(reg_pdev)) | |
2410 | return PTR_ERR(reg_pdev); | |
734366de | 2411 | |
4d9d88d1 SJR |
2412 | reg_pdev->dev.type = ®_device_type; |
2413 | ||
fe33eb39 | 2414 | spin_lock_init(®_requests_lock); |
e38f8a7a | 2415 | spin_lock_init(®_pending_beacons_lock); |
fe33eb39 | 2416 | |
80007efe LR |
2417 | reg_regdb_size_check(); |
2418 | ||
458f4f9e | 2419 | rcu_assign_pointer(cfg80211_regdomain, cfg80211_world_regdom); |
734366de | 2420 | |
09d989d1 LR |
2421 | user_alpha2[0] = '9'; |
2422 | user_alpha2[1] = '7'; | |
2423 | ||
ae9e4b0d | 2424 | /* We always try to get an update for the static regdomain */ |
458f4f9e | 2425 | err = regulatory_hint_core(cfg80211_world_regdom->alpha2); |
ba25c141 | 2426 | if (err) { |
bcf4f99b LR |
2427 | if (err == -ENOMEM) |
2428 | return err; | |
2429 | /* | |
2430 | * N.B. kobject_uevent_env() can fail mainly for when we're out | |
2431 | * memory which is handled and propagated appropriately above | |
2432 | * but it can also fail during a netlink_broadcast() or during | |
2433 | * early boot for call_usermodehelper(). For now treat these | |
2434 | * errors as non-fatal. | |
2435 | */ | |
e9c0268f | 2436 | pr_err("kobject_uevent_env() was unable to call CRDA during init\n"); |
bcf4f99b | 2437 | } |
734366de | 2438 | |
ae9e4b0d LR |
2439 | /* |
2440 | * Finally, if the user set the module parameter treat it | |
2441 | * as a user hint. | |
2442 | */ | |
2443 | if (!is_world_regdom(ieee80211_regdom)) | |
57b5ce07 LR |
2444 | regulatory_hint_user(ieee80211_regdom, |
2445 | NL80211_USER_REG_HINT_USER); | |
ae9e4b0d | 2446 | |
b2e1b302 LR |
2447 | return 0; |
2448 | } | |
2449 | ||
1a919318 | 2450 | void regulatory_exit(void) |
b2e1b302 | 2451 | { |
fe33eb39 | 2452 | struct regulatory_request *reg_request, *tmp; |
e38f8a7a | 2453 | struct reg_beacon *reg_beacon, *btmp; |
fe33eb39 LR |
2454 | |
2455 | cancel_work_sync(®_work); | |
a90c7a31 | 2456 | cancel_delayed_work_sync(®_timeout); |
fe33eb39 | 2457 | |
9027b149 | 2458 | /* Lock to suppress warnings */ |
38fd2143 | 2459 | rtnl_lock(); |
379b82f4 | 2460 | reset_regdomains(true, NULL); |
38fd2143 | 2461 | rtnl_unlock(); |
734366de | 2462 | |
58ebacc6 | 2463 | dev_set_uevent_suppress(®_pdev->dev, true); |
f6037d09 | 2464 | |
b2e1b302 | 2465 | platform_device_unregister(reg_pdev); |
734366de | 2466 | |
fea9bced JB |
2467 | list_for_each_entry_safe(reg_beacon, btmp, ®_pending_beacons, list) { |
2468 | list_del(®_beacon->list); | |
2469 | kfree(reg_beacon); | |
e38f8a7a | 2470 | } |
e38f8a7a | 2471 | |
fea9bced JB |
2472 | list_for_each_entry_safe(reg_beacon, btmp, ®_beacon_list, list) { |
2473 | list_del(®_beacon->list); | |
2474 | kfree(reg_beacon); | |
e38f8a7a LR |
2475 | } |
2476 | ||
fea9bced JB |
2477 | list_for_each_entry_safe(reg_request, tmp, ®_requests_list, list) { |
2478 | list_del(®_request->list); | |
2479 | kfree(reg_request); | |
fe33eb39 | 2480 | } |
8318d78a | 2481 | } |