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: |
21636c7f | 1341 | case NL80211_REGDOM_SET_BY_DRIVER: |
b3eb7f3f | 1342 | return REG_REQ_IGNORE; |
7db90f4a | 1343 | case NL80211_REGDOM_SET_BY_COUNTRY_IE: |
c492db37 | 1344 | if (reg_request_cell_base(lr)) { |
57b5ce07 LR |
1345 | /* Trust a Cell base station over the AP's country IE */ |
1346 | if (regdom_changes(pending_request->alpha2)) | |
2f92212b JB |
1347 | return REG_REQ_IGNORE; |
1348 | return REG_REQ_ALREADY_SET; | |
57b5ce07 LR |
1349 | } |
1350 | ||
c492db37 | 1351 | last_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx); |
806a9e39 | 1352 | |
2f92cd2e | 1353 | if (unlikely(!is_an_alpha2(pending_request->alpha2))) |
84fa4f43 | 1354 | return -EINVAL; |
c492db37 | 1355 | if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) { |
806a9e39 | 1356 | if (last_wiphy != wiphy) { |
84fa4f43 JB |
1357 | /* |
1358 | * Two cards with two APs claiming different | |
1fe90b03 | 1359 | * Country IE alpha2s. We could |
84fa4f43 JB |
1360 | * intersect them, but that seems unlikely |
1361 | * to be correct. Reject second one for now. | |
1362 | */ | |
2f92cd2e | 1363 | if (regdom_changes(pending_request->alpha2)) |
2f92212b JB |
1364 | return REG_REQ_IGNORE; |
1365 | return REG_REQ_ALREADY_SET; | |
84fa4f43 | 1366 | } |
fb1fc7ad LR |
1367 | /* |
1368 | * Two consecutive Country IE hints on the same wiphy. | |
1369 | * This should be picked up early by the driver/stack | |
1370 | */ | |
2f92cd2e | 1371 | if (WARN_ON(regdom_changes(pending_request->alpha2))) |
2f92212b JB |
1372 | return REG_REQ_OK; |
1373 | return REG_REQ_ALREADY_SET; | |
84fa4f43 | 1374 | } |
3430140a | 1375 | return REG_REQ_OK; |
84fa4f43 JB |
1376 | } |
1377 | ||
2f92212b | 1378 | return REG_REQ_IGNORE; |
84fa4f43 JB |
1379 | } |
1380 | ||
b2e253cf LR |
1381 | static void reg_set_request_processed(void) |
1382 | { | |
1383 | bool need_more_processing = false; | |
c492db37 | 1384 | struct regulatory_request *lr = get_last_request(); |
b2e253cf | 1385 | |
c492db37 | 1386 | lr->processed = true; |
b2e253cf LR |
1387 | |
1388 | spin_lock(®_requests_lock); | |
1389 | if (!list_empty(®_requests_list)) | |
1390 | need_more_processing = true; | |
1391 | spin_unlock(®_requests_lock); | |
1392 | ||
c492db37 | 1393 | if (lr->initiator == NL80211_REGDOM_SET_BY_USER) |
fe20b39e | 1394 | cancel_delayed_work(®_timeout); |
a90c7a31 | 1395 | |
b2e253cf LR |
1396 | if (need_more_processing) |
1397 | schedule_work(®_work); | |
1398 | } | |
1399 | ||
b3eb7f3f LR |
1400 | /** |
1401 | * reg_process_hint_core - process core regulatory requests | |
1402 | * @pending_request: a pending core regulatory request | |
1403 | * | |
1404 | * The wireless subsystem can use this function to process | |
1405 | * a regulatory request issued by the regulatory core. | |
1406 | * | |
1407 | * Returns one of the different reg request treatment values. | |
1408 | */ | |
1409 | static enum reg_request_treatment | |
1410 | reg_process_hint_core(struct regulatory_request *core_request) | |
1411 | { | |
1412 | struct regulatory_request *lr; | |
1413 | ||
1414 | lr = get_last_request(); | |
1415 | if (lr != &core_request_world && lr) | |
1416 | kfree_rcu(lr, rcu_head); | |
1417 | ||
1418 | core_request->intersect = false; | |
1419 | core_request->processed = false; | |
1420 | rcu_assign_pointer(last_request, core_request); | |
1421 | ||
1422 | if (call_crda(core_request->alpha2)) | |
1423 | return REG_REQ_IGNORE; | |
1424 | return REG_REQ_OK; | |
1425 | } | |
1426 | ||
0d97a619 LR |
1427 | static enum reg_request_treatment |
1428 | __reg_process_hint_user(struct regulatory_request *user_request) | |
1429 | { | |
1430 | struct regulatory_request *lr = get_last_request(); | |
1431 | ||
1432 | if (reg_request_cell_base(user_request)) | |
1433 | return reg_ignore_cell_hint(user_request); | |
1434 | ||
1435 | if (reg_request_cell_base(lr)) | |
1436 | return REG_REQ_IGNORE; | |
1437 | ||
1438 | if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) | |
1439 | return REG_REQ_INTERSECT; | |
1440 | /* | |
1441 | * If the user knows better the user should set the regdom | |
1442 | * to their country before the IE is picked up | |
1443 | */ | |
1444 | if (lr->initiator == NL80211_REGDOM_SET_BY_USER && | |
1445 | lr->intersect) | |
1446 | return REG_REQ_IGNORE; | |
1447 | /* | |
1448 | * Process user requests only after previous user/driver/core | |
1449 | * requests have been processed | |
1450 | */ | |
1451 | if ((lr->initiator == NL80211_REGDOM_SET_BY_CORE || | |
1452 | lr->initiator == NL80211_REGDOM_SET_BY_DRIVER || | |
1453 | lr->initiator == NL80211_REGDOM_SET_BY_USER) && | |
1454 | regdom_changes(lr->alpha2)) | |
1455 | return REG_REQ_IGNORE; | |
1456 | ||
1457 | if (!regdom_changes(user_request->alpha2)) | |
1458 | return REG_REQ_ALREADY_SET; | |
1459 | ||
1460 | return REG_REQ_OK; | |
1461 | } | |
1462 | ||
1463 | /** | |
1464 | * reg_process_hint_user - process user regulatory requests | |
1465 | * @user_request: a pending user regulatory request | |
1466 | * | |
1467 | * The wireless subsystem can use this function to process | |
1468 | * a regulatory request initiated by userspace. | |
1469 | * | |
1470 | * Returns one of the different reg request treatment values. | |
1471 | */ | |
1472 | static enum reg_request_treatment | |
1473 | reg_process_hint_user(struct regulatory_request *user_request) | |
1474 | { | |
1475 | enum reg_request_treatment treatment; | |
1476 | struct regulatory_request *lr; | |
1477 | ||
1478 | treatment = __reg_process_hint_user(user_request); | |
1479 | if (treatment == REG_REQ_IGNORE || | |
1480 | treatment == REG_REQ_ALREADY_SET) { | |
1481 | kfree(user_request); | |
1482 | return treatment; | |
1483 | } | |
1484 | ||
1485 | lr = get_last_request(); | |
1486 | if (lr != &core_request_world && lr) | |
1487 | kfree_rcu(lr, rcu_head); | |
1488 | ||
1489 | user_request->intersect = treatment == REG_REQ_INTERSECT; | |
1490 | user_request->processed = false; | |
1491 | rcu_assign_pointer(last_request, user_request); | |
1492 | ||
1493 | user_alpha2[0] = user_request->alpha2[0]; | |
1494 | user_alpha2[1] = user_request->alpha2[1]; | |
1495 | ||
1496 | if (call_crda(user_request->alpha2)) | |
1497 | return REG_REQ_IGNORE; | |
1498 | return REG_REQ_OK; | |
1499 | } | |
1500 | ||
21636c7f LR |
1501 | static enum reg_request_treatment |
1502 | __reg_process_hint_driver(struct regulatory_request *driver_request) | |
1503 | { | |
1504 | struct regulatory_request *lr = get_last_request(); | |
1505 | ||
1506 | if (lr->initiator == NL80211_REGDOM_SET_BY_CORE) { | |
1507 | if (regdom_changes(driver_request->alpha2)) | |
1508 | return REG_REQ_OK; | |
1509 | return REG_REQ_ALREADY_SET; | |
1510 | } | |
1511 | ||
1512 | /* | |
1513 | * This would happen if you unplug and plug your card | |
1514 | * back in or if you add a new device for which the previously | |
1515 | * loaded card also agrees on the regulatory domain. | |
1516 | */ | |
1517 | if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER && | |
1518 | !regdom_changes(driver_request->alpha2)) | |
1519 | return REG_REQ_ALREADY_SET; | |
1520 | ||
1521 | return REG_REQ_INTERSECT; | |
1522 | } | |
1523 | ||
1524 | /** | |
1525 | * reg_process_hint_driver - process driver regulatory requests | |
1526 | * @driver_request: a pending driver regulatory request | |
1527 | * | |
1528 | * The wireless subsystem can use this function to process | |
1529 | * a regulatory request issued by an 802.11 driver. | |
1530 | * | |
1531 | * Returns one of the different reg request treatment values. | |
1532 | */ | |
1533 | static enum reg_request_treatment | |
1534 | reg_process_hint_driver(struct wiphy *wiphy, | |
1535 | struct regulatory_request *driver_request) | |
1536 | { | |
1537 | const struct ieee80211_regdomain *regd; | |
1538 | enum reg_request_treatment treatment; | |
1539 | struct regulatory_request *lr; | |
1540 | ||
1541 | treatment = __reg_process_hint_driver(driver_request); | |
1542 | ||
1543 | switch (treatment) { | |
1544 | case REG_REQ_OK: | |
1545 | break; | |
1546 | case REG_REQ_IGNORE: | |
1547 | kfree(driver_request); | |
1548 | return treatment; | |
1549 | case REG_REQ_INTERSECT: | |
1550 | /* fall through */ | |
1551 | case REG_REQ_ALREADY_SET: | |
1552 | regd = reg_copy_regd(get_cfg80211_regdom()); | |
1553 | if (IS_ERR(regd)) { | |
1554 | kfree(driver_request); | |
1555 | return REG_REQ_IGNORE; | |
1556 | } | |
1557 | rcu_assign_pointer(wiphy->regd, regd); | |
1558 | } | |
1559 | ||
1560 | lr = get_last_request(); | |
1561 | if (lr != &core_request_world && lr) | |
1562 | kfree_rcu(lr, rcu_head); | |
1563 | ||
1564 | driver_request->intersect = treatment == REG_REQ_INTERSECT; | |
1565 | driver_request->processed = false; | |
1566 | rcu_assign_pointer(last_request, driver_request); | |
1567 | ||
1568 | /* | |
1569 | * Since CRDA will not be called in this case as we already | |
1570 | * have applied the requested regulatory domain before we just | |
1571 | * inform userspace we have processed the request | |
1572 | */ | |
1573 | if (treatment == REG_REQ_ALREADY_SET) { | |
1574 | nl80211_send_reg_change_event(driver_request); | |
1575 | reg_set_request_processed(); | |
1576 | return treatment; | |
1577 | } | |
1578 | ||
1579 | if (call_crda(driver_request->alpha2)) | |
1580 | return REG_REQ_IGNORE; | |
1581 | return REG_REQ_OK; | |
1582 | } | |
1583 | ||
d1c96a9a LR |
1584 | /** |
1585 | * __regulatory_hint - hint to the wireless core a regulatory domain | |
1586 | * @wiphy: if the hint comes from country information from an AP, this | |
1587 | * is required to be set to the wiphy that received the information | |
28da32d7 | 1588 | * @pending_request: the regulatory request currently being processed |
d1c96a9a LR |
1589 | * |
1590 | * The Wireless subsystem can use this function to hint to the wireless core | |
28da32d7 | 1591 | * what it believes should be the current regulatory domain. |
d1c96a9a | 1592 | * |
2f92212b | 1593 | * Returns one of the different reg request treatment values. |
d1c96a9a | 1594 | */ |
2f92212b JB |
1595 | static enum reg_request_treatment |
1596 | __regulatory_hint(struct wiphy *wiphy, | |
1597 | struct regulatory_request *pending_request) | |
b2e1b302 | 1598 | { |
e9763c3c | 1599 | const struct ieee80211_regdomain *regd; |
9c96477d | 1600 | bool intersect = false; |
2f92212b | 1601 | enum reg_request_treatment treatment; |
c492db37 | 1602 | struct regulatory_request *lr; |
761cf7ec | 1603 | |
2f92212b | 1604 | treatment = get_reg_request_treatment(wiphy, pending_request); |
9c96477d | 1605 | |
2f92212b JB |
1606 | switch (treatment) { |
1607 | case REG_REQ_INTERSECT: | |
7db90f4a LR |
1608 | if (pending_request->initiator == |
1609 | NL80211_REGDOM_SET_BY_DRIVER) { | |
458f4f9e | 1610 | regd = reg_copy_regd(get_cfg80211_regdom()); |
e9763c3c | 1611 | if (IS_ERR(regd)) { |
d951c1dd | 1612 | kfree(pending_request); |
e9763c3c | 1613 | return PTR_ERR(regd); |
d951c1dd | 1614 | } |
458f4f9e | 1615 | rcu_assign_pointer(wiphy->regd, regd); |
3e0c3ff3 | 1616 | } |
9c96477d | 1617 | intersect = true; |
2f92212b JB |
1618 | break; |
1619 | case REG_REQ_OK: | |
1620 | break; | |
1621 | default: | |
fb1fc7ad LR |
1622 | /* |
1623 | * If the regulatory domain being requested by the | |
3e0c3ff3 | 1624 | * driver has already been set just copy it to the |
fb1fc7ad LR |
1625 | * wiphy |
1626 | */ | |
2f92212b JB |
1627 | if (treatment == REG_REQ_ALREADY_SET && |
1628 | pending_request->initiator == NL80211_REGDOM_SET_BY_DRIVER) { | |
458f4f9e | 1629 | regd = reg_copy_regd(get_cfg80211_regdom()); |
e9763c3c | 1630 | if (IS_ERR(regd)) { |
d951c1dd | 1631 | kfree(pending_request); |
2f92212b | 1632 | return REG_REQ_IGNORE; |
d951c1dd | 1633 | } |
2f92212b | 1634 | treatment = REG_REQ_ALREADY_SET; |
458f4f9e | 1635 | rcu_assign_pointer(wiphy->regd, regd); |
3e0c3ff3 LR |
1636 | goto new_request; |
1637 | } | |
d951c1dd | 1638 | kfree(pending_request); |
2f92212b | 1639 | return treatment; |
3e0c3ff3 | 1640 | } |
b2e1b302 | 1641 | |
3e0c3ff3 | 1642 | new_request: |
c492db37 JB |
1643 | lr = get_last_request(); |
1644 | if (lr != &core_request_world && lr) | |
1645 | kfree_rcu(lr, rcu_head); | |
5203cdb6 | 1646 | |
c492db37 JB |
1647 | pending_request->intersect = intersect; |
1648 | pending_request->processed = false; | |
1649 | rcu_assign_pointer(last_request, pending_request); | |
1650 | lr = pending_request; | |
5203cdb6 | 1651 | |
d951c1dd | 1652 | pending_request = NULL; |
3e0c3ff3 | 1653 | |
c492db37 JB |
1654 | if (lr->initiator == NL80211_REGDOM_SET_BY_USER) { |
1655 | user_alpha2[0] = lr->alpha2[0]; | |
1656 | user_alpha2[1] = lr->alpha2[1]; | |
09d989d1 LR |
1657 | } |
1658 | ||
2f92212b JB |
1659 | /* When r == REG_REQ_INTERSECT we do need to call CRDA */ |
1660 | if (treatment != REG_REQ_OK && treatment != REG_REQ_INTERSECT) { | |
73d54c9e LR |
1661 | /* |
1662 | * Since CRDA will not be called in this case as we already | |
1663 | * have applied the requested regulatory domain before we just | |
1664 | * inform userspace we have processed the request | |
1665 | */ | |
2f92212b | 1666 | if (treatment == REG_REQ_ALREADY_SET) { |
c492db37 | 1667 | nl80211_send_reg_change_event(lr); |
b2e253cf LR |
1668 | reg_set_request_processed(); |
1669 | } | |
2f92212b | 1670 | return treatment; |
73d54c9e | 1671 | } |
3e0c3ff3 | 1672 | |
c492db37 | 1673 | if (call_crda(lr->alpha2)) |
2f92212b JB |
1674 | return REG_REQ_IGNORE; |
1675 | return REG_REQ_OK; | |
b2e1b302 LR |
1676 | } |
1677 | ||
30a548c7 | 1678 | /* This processes *all* regulatory hints */ |
1daa37c7 | 1679 | static void reg_process_hint(struct regulatory_request *reg_request) |
fe33eb39 | 1680 | { |
fe33eb39 | 1681 | struct wiphy *wiphy = NULL; |
b3eb7f3f | 1682 | enum reg_request_treatment treatment; |
fe33eb39 | 1683 | |
fdc9d7b2 JB |
1684 | if (WARN_ON(!reg_request->alpha2)) |
1685 | return; | |
fe33eb39 | 1686 | |
f4173766 | 1687 | if (reg_request->wiphy_idx != WIPHY_IDX_INVALID) |
fe33eb39 LR |
1688 | wiphy = wiphy_idx_to_wiphy(reg_request->wiphy_idx); |
1689 | ||
1daa37c7 | 1690 | if (reg_request->initiator == NL80211_REGDOM_SET_BY_DRIVER && !wiphy) { |
d951c1dd | 1691 | kfree(reg_request); |
b0e2880b | 1692 | return; |
fe33eb39 LR |
1693 | } |
1694 | ||
b3eb7f3f LR |
1695 | switch (reg_request->initiator) { |
1696 | case NL80211_REGDOM_SET_BY_CORE: | |
1697 | reg_process_hint_core(reg_request); | |
1698 | return; | |
1699 | case NL80211_REGDOM_SET_BY_USER: | |
0d97a619 LR |
1700 | treatment = reg_process_hint_user(reg_request); |
1701 | if (treatment == REG_REQ_OK || | |
1702 | treatment == REG_REQ_ALREADY_SET) | |
1703 | return; | |
1704 | schedule_delayed_work(®_timeout, msecs_to_jiffies(3142)); | |
1705 | return; | |
b3eb7f3f | 1706 | case NL80211_REGDOM_SET_BY_DRIVER: |
21636c7f LR |
1707 | treatment = reg_process_hint_driver(wiphy, reg_request); |
1708 | break; | |
b3eb7f3f LR |
1709 | case NL80211_REGDOM_SET_BY_COUNTRY_IE: |
1710 | treatment = __regulatory_hint(wiphy, reg_request); | |
1711 | break; | |
1712 | default: | |
1713 | WARN(1, "invalid initiator %d\n", reg_request->initiator); | |
1714 | return; | |
1715 | } | |
1716 | ||
1717 | switch (treatment) { | |
2f92212b JB |
1718 | case REG_REQ_ALREADY_SET: |
1719 | /* This is required so that the orig_* parameters are saved */ | |
1720 | if (wiphy && wiphy->flags & WIPHY_FLAG_STRICT_REGULATORY) | |
1daa37c7 | 1721 | wiphy_update_regulatory(wiphy, reg_request->initiator); |
2f92212b JB |
1722 | break; |
1723 | default: | |
2f92212b | 1724 | break; |
a90c7a31 | 1725 | } |
fe33eb39 LR |
1726 | } |
1727 | ||
b2e253cf LR |
1728 | /* |
1729 | * Processes regulatory hints, this is all the NL80211_REGDOM_SET_BY_* | |
1730 | * Regulatory hints come on a first come first serve basis and we | |
1731 | * must process each one atomically. | |
1732 | */ | |
fe33eb39 | 1733 | static void reg_process_pending_hints(void) |
b0e2880b | 1734 | { |
c492db37 | 1735 | struct regulatory_request *reg_request, *lr; |
fe33eb39 | 1736 | |
c492db37 | 1737 | lr = get_last_request(); |
b0e2880b | 1738 | |
b2e253cf | 1739 | /* When last_request->processed becomes true this will be rescheduled */ |
c492db37 | 1740 | if (lr && !lr->processed) { |
1a919318 | 1741 | REG_DBG_PRINT("Pending regulatory request, waiting for it to be processed...\n"); |
5fe231e8 | 1742 | return; |
b2e253cf LR |
1743 | } |
1744 | ||
fe33eb39 | 1745 | spin_lock(®_requests_lock); |
fe33eb39 | 1746 | |
b2e253cf | 1747 | if (list_empty(®_requests_list)) { |
d951c1dd | 1748 | spin_unlock(®_requests_lock); |
5fe231e8 | 1749 | return; |
fe33eb39 | 1750 | } |
b2e253cf LR |
1751 | |
1752 | reg_request = list_first_entry(®_requests_list, | |
1753 | struct regulatory_request, | |
1754 | list); | |
1755 | list_del_init(®_request->list); | |
1756 | ||
fe33eb39 | 1757 | spin_unlock(®_requests_lock); |
b0e2880b | 1758 | |
1daa37c7 | 1759 | reg_process_hint(reg_request); |
fe33eb39 LR |
1760 | } |
1761 | ||
e38f8a7a LR |
1762 | /* Processes beacon hints -- this has nothing to do with country IEs */ |
1763 | static void reg_process_pending_beacon_hints(void) | |
1764 | { | |
79c97e97 | 1765 | struct cfg80211_registered_device *rdev; |
e38f8a7a LR |
1766 | struct reg_beacon *pending_beacon, *tmp; |
1767 | ||
e38f8a7a LR |
1768 | /* This goes through the _pending_ beacon list */ |
1769 | spin_lock_bh(®_pending_beacons_lock); | |
1770 | ||
e38f8a7a LR |
1771 | list_for_each_entry_safe(pending_beacon, tmp, |
1772 | ®_pending_beacons, list) { | |
e38f8a7a LR |
1773 | list_del_init(&pending_beacon->list); |
1774 | ||
1775 | /* Applies the beacon hint to current wiphys */ | |
79c97e97 JB |
1776 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) |
1777 | wiphy_update_new_beacon(&rdev->wiphy, pending_beacon); | |
e38f8a7a LR |
1778 | |
1779 | /* Remembers the beacon hint for new wiphys or reg changes */ | |
1780 | list_add_tail(&pending_beacon->list, ®_beacon_list); | |
1781 | } | |
1782 | ||
1783 | spin_unlock_bh(®_pending_beacons_lock); | |
e38f8a7a LR |
1784 | } |
1785 | ||
fe33eb39 LR |
1786 | static void reg_todo(struct work_struct *work) |
1787 | { | |
5fe231e8 | 1788 | rtnl_lock(); |
fe33eb39 | 1789 | reg_process_pending_hints(); |
e38f8a7a | 1790 | reg_process_pending_beacon_hints(); |
5fe231e8 | 1791 | rtnl_unlock(); |
fe33eb39 LR |
1792 | } |
1793 | ||
fe33eb39 LR |
1794 | static void queue_regulatory_request(struct regulatory_request *request) |
1795 | { | |
d4f2c881 JB |
1796 | request->alpha2[0] = toupper(request->alpha2[0]); |
1797 | request->alpha2[1] = toupper(request->alpha2[1]); | |
c61029c7 | 1798 | |
fe33eb39 LR |
1799 | spin_lock(®_requests_lock); |
1800 | list_add_tail(&request->list, ®_requests_list); | |
1801 | spin_unlock(®_requests_lock); | |
1802 | ||
1803 | schedule_work(®_work); | |
1804 | } | |
1805 | ||
09d989d1 LR |
1806 | /* |
1807 | * Core regulatory hint -- happens during cfg80211_init() | |
1808 | * and when we restore regulatory settings. | |
1809 | */ | |
ba25c141 LR |
1810 | static int regulatory_hint_core(const char *alpha2) |
1811 | { | |
1812 | struct regulatory_request *request; | |
1813 | ||
1a919318 | 1814 | request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); |
ba25c141 LR |
1815 | if (!request) |
1816 | return -ENOMEM; | |
1817 | ||
1818 | request->alpha2[0] = alpha2[0]; | |
1819 | request->alpha2[1] = alpha2[1]; | |
7db90f4a | 1820 | request->initiator = NL80211_REGDOM_SET_BY_CORE; |
ba25c141 | 1821 | |
31e99729 | 1822 | queue_regulatory_request(request); |
5078b2e3 | 1823 | |
fe33eb39 | 1824 | return 0; |
ba25c141 LR |
1825 | } |
1826 | ||
fe33eb39 | 1827 | /* User hints */ |
57b5ce07 LR |
1828 | int regulatory_hint_user(const char *alpha2, |
1829 | enum nl80211_user_reg_hint_type user_reg_hint_type) | |
b2e1b302 | 1830 | { |
fe33eb39 LR |
1831 | struct regulatory_request *request; |
1832 | ||
fdc9d7b2 JB |
1833 | if (WARN_ON(!alpha2)) |
1834 | return -EINVAL; | |
b2e1b302 | 1835 | |
fe33eb39 LR |
1836 | request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); |
1837 | if (!request) | |
1838 | return -ENOMEM; | |
1839 | ||
f4173766 | 1840 | request->wiphy_idx = WIPHY_IDX_INVALID; |
fe33eb39 LR |
1841 | request->alpha2[0] = alpha2[0]; |
1842 | request->alpha2[1] = alpha2[1]; | |
e12822e1 | 1843 | request->initiator = NL80211_REGDOM_SET_BY_USER; |
57b5ce07 | 1844 | request->user_reg_hint_type = user_reg_hint_type; |
fe33eb39 LR |
1845 | |
1846 | queue_regulatory_request(request); | |
1847 | ||
1848 | return 0; | |
1849 | } | |
1850 | ||
1851 | /* Driver hints */ | |
1852 | int regulatory_hint(struct wiphy *wiphy, const char *alpha2) | |
1853 | { | |
1854 | struct regulatory_request *request; | |
1855 | ||
fdc9d7b2 JB |
1856 | if (WARN_ON(!alpha2 || !wiphy)) |
1857 | return -EINVAL; | |
fe33eb39 LR |
1858 | |
1859 | request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); | |
1860 | if (!request) | |
1861 | return -ENOMEM; | |
1862 | ||
1863 | request->wiphy_idx = get_wiphy_idx(wiphy); | |
1864 | ||
fe33eb39 LR |
1865 | request->alpha2[0] = alpha2[0]; |
1866 | request->alpha2[1] = alpha2[1]; | |
7db90f4a | 1867 | request->initiator = NL80211_REGDOM_SET_BY_DRIVER; |
fe33eb39 LR |
1868 | |
1869 | queue_regulatory_request(request); | |
1870 | ||
1871 | return 0; | |
b2e1b302 LR |
1872 | } |
1873 | EXPORT_SYMBOL(regulatory_hint); | |
1874 | ||
789fd033 LR |
1875 | void regulatory_hint_country_ie(struct wiphy *wiphy, enum ieee80211_band band, |
1876 | const u8 *country_ie, u8 country_ie_len) | |
3f2355cb | 1877 | { |
3f2355cb | 1878 | char alpha2[2]; |
3f2355cb | 1879 | enum environment_cap env = ENVIRON_ANY; |
db2424c5 | 1880 | struct regulatory_request *request = NULL, *lr; |
d335fe63 | 1881 | |
3f2355cb LR |
1882 | /* IE len must be evenly divisible by 2 */ |
1883 | if (country_ie_len & 0x01) | |
db2424c5 | 1884 | return; |
3f2355cb LR |
1885 | |
1886 | if (country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN) | |
db2424c5 JB |
1887 | return; |
1888 | ||
1889 | request = kzalloc(sizeof(*request), GFP_KERNEL); | |
1890 | if (!request) | |
1891 | return; | |
3f2355cb | 1892 | |
3f2355cb LR |
1893 | alpha2[0] = country_ie[0]; |
1894 | alpha2[1] = country_ie[1]; | |
1895 | ||
1896 | if (country_ie[2] == 'I') | |
1897 | env = ENVIRON_INDOOR; | |
1898 | else if (country_ie[2] == 'O') | |
1899 | env = ENVIRON_OUTDOOR; | |
1900 | ||
db2424c5 JB |
1901 | rcu_read_lock(); |
1902 | lr = get_last_request(); | |
1903 | ||
1904 | if (unlikely(!lr)) | |
1905 | goto out; | |
1906 | ||
fb1fc7ad | 1907 | /* |
8b19e6ca | 1908 | * We will run this only upon a successful connection on cfg80211. |
4b44c8bc | 1909 | * We leave conflict resolution to the workqueue, where can hold |
5fe231e8 | 1910 | * the RTNL. |
fb1fc7ad | 1911 | */ |
c492db37 JB |
1912 | if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE && |
1913 | lr->wiphy_idx != WIPHY_IDX_INVALID) | |
4b44c8bc | 1914 | goto out; |
3f2355cb | 1915 | |
fe33eb39 | 1916 | request->wiphy_idx = get_wiphy_idx(wiphy); |
4f366c5d JL |
1917 | request->alpha2[0] = alpha2[0]; |
1918 | request->alpha2[1] = alpha2[1]; | |
7db90f4a | 1919 | request->initiator = NL80211_REGDOM_SET_BY_COUNTRY_IE; |
fe33eb39 LR |
1920 | request->country_ie_env = env; |
1921 | ||
fe33eb39 | 1922 | queue_regulatory_request(request); |
db2424c5 | 1923 | request = NULL; |
3f2355cb | 1924 | out: |
db2424c5 JB |
1925 | kfree(request); |
1926 | rcu_read_unlock(); | |
3f2355cb | 1927 | } |
b2e1b302 | 1928 | |
09d989d1 LR |
1929 | static void restore_alpha2(char *alpha2, bool reset_user) |
1930 | { | |
1931 | /* indicates there is no alpha2 to consider for restoration */ | |
1932 | alpha2[0] = '9'; | |
1933 | alpha2[1] = '7'; | |
1934 | ||
1935 | /* The user setting has precedence over the module parameter */ | |
1936 | if (is_user_regdom_saved()) { | |
1937 | /* Unless we're asked to ignore it and reset it */ | |
1938 | if (reset_user) { | |
1a919318 | 1939 | REG_DBG_PRINT("Restoring regulatory settings including user preference\n"); |
09d989d1 LR |
1940 | user_alpha2[0] = '9'; |
1941 | user_alpha2[1] = '7'; | |
1942 | ||
1943 | /* | |
1944 | * If we're ignoring user settings, we still need to | |
1945 | * check the module parameter to ensure we put things | |
1946 | * back as they were for a full restore. | |
1947 | */ | |
1948 | if (!is_world_regdom(ieee80211_regdom)) { | |
1a919318 JB |
1949 | REG_DBG_PRINT("Keeping preference on module parameter ieee80211_regdom: %c%c\n", |
1950 | ieee80211_regdom[0], ieee80211_regdom[1]); | |
09d989d1 LR |
1951 | alpha2[0] = ieee80211_regdom[0]; |
1952 | alpha2[1] = ieee80211_regdom[1]; | |
1953 | } | |
1954 | } else { | |
1a919318 JB |
1955 | REG_DBG_PRINT("Restoring regulatory settings while preserving user preference for: %c%c\n", |
1956 | user_alpha2[0], user_alpha2[1]); | |
09d989d1 LR |
1957 | alpha2[0] = user_alpha2[0]; |
1958 | alpha2[1] = user_alpha2[1]; | |
1959 | } | |
1960 | } else if (!is_world_regdom(ieee80211_regdom)) { | |
1a919318 JB |
1961 | REG_DBG_PRINT("Keeping preference on module parameter ieee80211_regdom: %c%c\n", |
1962 | ieee80211_regdom[0], ieee80211_regdom[1]); | |
09d989d1 LR |
1963 | alpha2[0] = ieee80211_regdom[0]; |
1964 | alpha2[1] = ieee80211_regdom[1]; | |
1965 | } else | |
d91e41b6 | 1966 | REG_DBG_PRINT("Restoring regulatory settings\n"); |
09d989d1 LR |
1967 | } |
1968 | ||
5ce543d1 RM |
1969 | static void restore_custom_reg_settings(struct wiphy *wiphy) |
1970 | { | |
1971 | struct ieee80211_supported_band *sband; | |
1972 | enum ieee80211_band band; | |
1973 | struct ieee80211_channel *chan; | |
1974 | int i; | |
1975 | ||
1976 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) { | |
1977 | sband = wiphy->bands[band]; | |
1978 | if (!sband) | |
1979 | continue; | |
1980 | for (i = 0; i < sband->n_channels; i++) { | |
1981 | chan = &sband->channels[i]; | |
1982 | chan->flags = chan->orig_flags; | |
1983 | chan->max_antenna_gain = chan->orig_mag; | |
1984 | chan->max_power = chan->orig_mpwr; | |
899852af | 1985 | chan->beacon_found = false; |
5ce543d1 RM |
1986 | } |
1987 | } | |
1988 | } | |
1989 | ||
09d989d1 LR |
1990 | /* |
1991 | * Restoring regulatory settings involves ingoring any | |
1992 | * possibly stale country IE information and user regulatory | |
1993 | * settings if so desired, this includes any beacon hints | |
1994 | * learned as we could have traveled outside to another country | |
1995 | * after disconnection. To restore regulatory settings we do | |
1996 | * exactly what we did at bootup: | |
1997 | * | |
1998 | * - send a core regulatory hint | |
1999 | * - send a user regulatory hint if applicable | |
2000 | * | |
2001 | * Device drivers that send a regulatory hint for a specific country | |
2002 | * keep their own regulatory domain on wiphy->regd so that does does | |
2003 | * not need to be remembered. | |
2004 | */ | |
2005 | static void restore_regulatory_settings(bool reset_user) | |
2006 | { | |
2007 | char alpha2[2]; | |
cee0bec5 | 2008 | char world_alpha2[2]; |
09d989d1 | 2009 | struct reg_beacon *reg_beacon, *btmp; |
14609555 LR |
2010 | struct regulatory_request *reg_request, *tmp; |
2011 | LIST_HEAD(tmp_reg_req_list); | |
5ce543d1 | 2012 | struct cfg80211_registered_device *rdev; |
09d989d1 | 2013 | |
5fe231e8 JB |
2014 | ASSERT_RTNL(); |
2015 | ||
2d319867 | 2016 | reset_regdomains(true, &world_regdom); |
09d989d1 LR |
2017 | restore_alpha2(alpha2, reset_user); |
2018 | ||
14609555 LR |
2019 | /* |
2020 | * If there's any pending requests we simply | |
2021 | * stash them to a temporary pending queue and | |
2022 | * add then after we've restored regulatory | |
2023 | * settings. | |
2024 | */ | |
2025 | spin_lock(®_requests_lock); | |
fea9bced JB |
2026 | list_for_each_entry_safe(reg_request, tmp, ®_requests_list, list) { |
2027 | if (reg_request->initiator != NL80211_REGDOM_SET_BY_USER) | |
2028 | continue; | |
2029 | list_move_tail(®_request->list, &tmp_reg_req_list); | |
14609555 LR |
2030 | } |
2031 | spin_unlock(®_requests_lock); | |
2032 | ||
09d989d1 LR |
2033 | /* Clear beacon hints */ |
2034 | spin_lock_bh(®_pending_beacons_lock); | |
fea9bced JB |
2035 | list_for_each_entry_safe(reg_beacon, btmp, ®_pending_beacons, list) { |
2036 | list_del(®_beacon->list); | |
2037 | kfree(reg_beacon); | |
09d989d1 LR |
2038 | } |
2039 | spin_unlock_bh(®_pending_beacons_lock); | |
2040 | ||
fea9bced JB |
2041 | list_for_each_entry_safe(reg_beacon, btmp, ®_beacon_list, list) { |
2042 | list_del(®_beacon->list); | |
2043 | kfree(reg_beacon); | |
09d989d1 LR |
2044 | } |
2045 | ||
2046 | /* First restore to the basic regulatory settings */ | |
379b82f4 JB |
2047 | world_alpha2[0] = cfg80211_world_regdom->alpha2[0]; |
2048 | world_alpha2[1] = cfg80211_world_regdom->alpha2[1]; | |
09d989d1 | 2049 | |
5ce543d1 RM |
2050 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) { |
2051 | if (rdev->wiphy.flags & WIPHY_FLAG_CUSTOM_REGULATORY) | |
2052 | restore_custom_reg_settings(&rdev->wiphy); | |
2053 | } | |
2054 | ||
cee0bec5 | 2055 | regulatory_hint_core(world_alpha2); |
09d989d1 LR |
2056 | |
2057 | /* | |
2058 | * This restores the ieee80211_regdom module parameter | |
2059 | * preference or the last user requested regulatory | |
2060 | * settings, user regulatory settings takes precedence. | |
2061 | */ | |
2062 | if (is_an_alpha2(alpha2)) | |
57b5ce07 | 2063 | regulatory_hint_user(user_alpha2, NL80211_USER_REG_HINT_USER); |
09d989d1 | 2064 | |
14609555 | 2065 | spin_lock(®_requests_lock); |
11cff96c | 2066 | list_splice_tail_init(&tmp_reg_req_list, ®_requests_list); |
14609555 LR |
2067 | spin_unlock(®_requests_lock); |
2068 | ||
14609555 LR |
2069 | REG_DBG_PRINT("Kicking the queue\n"); |
2070 | ||
2071 | schedule_work(®_work); | |
2072 | } | |
09d989d1 LR |
2073 | |
2074 | void regulatory_hint_disconnect(void) | |
2075 | { | |
1a919318 | 2076 | REG_DBG_PRINT("All devices are disconnected, going to restore regulatory settings\n"); |
09d989d1 LR |
2077 | restore_regulatory_settings(false); |
2078 | } | |
2079 | ||
e38f8a7a LR |
2080 | static bool freq_is_chan_12_13_14(u16 freq) |
2081 | { | |
59eb21a6 BR |
2082 | if (freq == ieee80211_channel_to_frequency(12, IEEE80211_BAND_2GHZ) || |
2083 | freq == ieee80211_channel_to_frequency(13, IEEE80211_BAND_2GHZ) || | |
2084 | freq == ieee80211_channel_to_frequency(14, IEEE80211_BAND_2GHZ)) | |
e38f8a7a LR |
2085 | return true; |
2086 | return false; | |
2087 | } | |
2088 | ||
3ebfa6e7 LR |
2089 | static bool pending_reg_beacon(struct ieee80211_channel *beacon_chan) |
2090 | { | |
2091 | struct reg_beacon *pending_beacon; | |
2092 | ||
2093 | list_for_each_entry(pending_beacon, ®_pending_beacons, list) | |
2094 | if (beacon_chan->center_freq == | |
2095 | pending_beacon->chan.center_freq) | |
2096 | return true; | |
2097 | return false; | |
2098 | } | |
2099 | ||
e38f8a7a LR |
2100 | int regulatory_hint_found_beacon(struct wiphy *wiphy, |
2101 | struct ieee80211_channel *beacon_chan, | |
2102 | gfp_t gfp) | |
2103 | { | |
2104 | struct reg_beacon *reg_beacon; | |
3ebfa6e7 | 2105 | bool processing; |
e38f8a7a | 2106 | |
1a919318 JB |
2107 | if (beacon_chan->beacon_found || |
2108 | beacon_chan->flags & IEEE80211_CHAN_RADAR || | |
e38f8a7a | 2109 | (beacon_chan->band == IEEE80211_BAND_2GHZ && |
1a919318 | 2110 | !freq_is_chan_12_13_14(beacon_chan->center_freq))) |
e38f8a7a LR |
2111 | return 0; |
2112 | ||
3ebfa6e7 LR |
2113 | spin_lock_bh(®_pending_beacons_lock); |
2114 | processing = pending_reg_beacon(beacon_chan); | |
2115 | spin_unlock_bh(®_pending_beacons_lock); | |
2116 | ||
2117 | if (processing) | |
e38f8a7a LR |
2118 | return 0; |
2119 | ||
2120 | reg_beacon = kzalloc(sizeof(struct reg_beacon), gfp); | |
2121 | if (!reg_beacon) | |
2122 | return -ENOMEM; | |
2123 | ||
1a919318 | 2124 | REG_DBG_PRINT("Found new beacon on frequency: %d MHz (Ch %d) on %s\n", |
4113f751 LR |
2125 | beacon_chan->center_freq, |
2126 | ieee80211_frequency_to_channel(beacon_chan->center_freq), | |
2127 | wiphy_name(wiphy)); | |
2128 | ||
e38f8a7a | 2129 | memcpy(®_beacon->chan, beacon_chan, |
1a919318 | 2130 | sizeof(struct ieee80211_channel)); |
e38f8a7a LR |
2131 | |
2132 | /* | |
2133 | * Since we can be called from BH or and non-BH context | |
2134 | * we must use spin_lock_bh() | |
2135 | */ | |
2136 | spin_lock_bh(®_pending_beacons_lock); | |
2137 | list_add_tail(®_beacon->list, ®_pending_beacons); | |
2138 | spin_unlock_bh(®_pending_beacons_lock); | |
2139 | ||
2140 | schedule_work(®_work); | |
2141 | ||
2142 | return 0; | |
2143 | } | |
2144 | ||
a3d2eaf0 | 2145 | static void print_rd_rules(const struct ieee80211_regdomain *rd) |
b2e1b302 LR |
2146 | { |
2147 | unsigned int i; | |
a3d2eaf0 JB |
2148 | const struct ieee80211_reg_rule *reg_rule = NULL; |
2149 | const struct ieee80211_freq_range *freq_range = NULL; | |
2150 | const struct ieee80211_power_rule *power_rule = NULL; | |
b2e1b302 | 2151 | |
6653325a | 2152 | pr_info(" (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)\n"); |
b2e1b302 LR |
2153 | |
2154 | for (i = 0; i < rd->n_reg_rules; i++) { | |
2155 | reg_rule = &rd->reg_rules[i]; | |
2156 | freq_range = ®_rule->freq_range; | |
2157 | power_rule = ®_rule->power_rule; | |
2158 | ||
fb1fc7ad LR |
2159 | /* |
2160 | * There may not be documentation for max antenna gain | |
2161 | * in certain regions | |
2162 | */ | |
b2e1b302 | 2163 | if (power_rule->max_antenna_gain) |
6653325a | 2164 | pr_info(" (%d KHz - %d KHz @ %d KHz), (%d mBi, %d mBm)\n", |
b2e1b302 LR |
2165 | freq_range->start_freq_khz, |
2166 | freq_range->end_freq_khz, | |
2167 | freq_range->max_bandwidth_khz, | |
2168 | power_rule->max_antenna_gain, | |
2169 | power_rule->max_eirp); | |
2170 | else | |
6653325a | 2171 | pr_info(" (%d KHz - %d KHz @ %d KHz), (N/A, %d mBm)\n", |
b2e1b302 LR |
2172 | freq_range->start_freq_khz, |
2173 | freq_range->end_freq_khz, | |
2174 | freq_range->max_bandwidth_khz, | |
2175 | power_rule->max_eirp); | |
2176 | } | |
2177 | } | |
2178 | ||
8b60b078 LR |
2179 | bool reg_supported_dfs_region(u8 dfs_region) |
2180 | { | |
2181 | switch (dfs_region) { | |
2182 | case NL80211_DFS_UNSET: | |
2183 | case NL80211_DFS_FCC: | |
2184 | case NL80211_DFS_ETSI: | |
2185 | case NL80211_DFS_JP: | |
2186 | return true; | |
2187 | default: | |
2188 | REG_DBG_PRINT("Ignoring uknown DFS master region: %d\n", | |
2189 | dfs_region); | |
2190 | return false; | |
2191 | } | |
2192 | } | |
2193 | ||
2194 | static void print_dfs_region(u8 dfs_region) | |
2195 | { | |
2196 | if (!dfs_region) | |
2197 | return; | |
2198 | ||
2199 | switch (dfs_region) { | |
2200 | case NL80211_DFS_FCC: | |
2201 | pr_info(" DFS Master region FCC"); | |
2202 | break; | |
2203 | case NL80211_DFS_ETSI: | |
2204 | pr_info(" DFS Master region ETSI"); | |
2205 | break; | |
2206 | case NL80211_DFS_JP: | |
2207 | pr_info(" DFS Master region JP"); | |
2208 | break; | |
2209 | default: | |
1a919318 | 2210 | pr_info(" DFS Master region Unknown"); |
8b60b078 LR |
2211 | break; |
2212 | } | |
2213 | } | |
2214 | ||
a3d2eaf0 | 2215 | static void print_regdomain(const struct ieee80211_regdomain *rd) |
b2e1b302 | 2216 | { |
c492db37 | 2217 | struct regulatory_request *lr = get_last_request(); |
b2e1b302 | 2218 | |
3f2355cb | 2219 | if (is_intersected_alpha2(rd->alpha2)) { |
c492db37 | 2220 | if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) { |
79c97e97 | 2221 | struct cfg80211_registered_device *rdev; |
c492db37 | 2222 | rdev = cfg80211_rdev_by_wiphy_idx(lr->wiphy_idx); |
79c97e97 | 2223 | if (rdev) { |
e9c0268f | 2224 | pr_info("Current regulatory domain updated by AP to: %c%c\n", |
79c97e97 JB |
2225 | rdev->country_ie_alpha2[0], |
2226 | rdev->country_ie_alpha2[1]); | |
3f2355cb | 2227 | } else |
e9c0268f | 2228 | pr_info("Current regulatory domain intersected:\n"); |
3f2355cb | 2229 | } else |
e9c0268f | 2230 | pr_info("Current regulatory domain intersected:\n"); |
1a919318 | 2231 | } else if (is_world_regdom(rd->alpha2)) { |
e9c0268f | 2232 | pr_info("World regulatory domain updated:\n"); |
1a919318 | 2233 | } else { |
b2e1b302 | 2234 | if (is_unknown_alpha2(rd->alpha2)) |
e9c0268f | 2235 | pr_info("Regulatory domain changed to driver built-in settings (unknown country)\n"); |
57b5ce07 | 2236 | else { |
c492db37 | 2237 | if (reg_request_cell_base(lr)) |
1a919318 | 2238 | pr_info("Regulatory domain changed to country: %c%c by Cell Station\n", |
57b5ce07 LR |
2239 | rd->alpha2[0], rd->alpha2[1]); |
2240 | else | |
1a919318 | 2241 | pr_info("Regulatory domain changed to country: %c%c\n", |
57b5ce07 LR |
2242 | rd->alpha2[0], rd->alpha2[1]); |
2243 | } | |
b2e1b302 | 2244 | } |
1a919318 | 2245 | |
8b60b078 | 2246 | print_dfs_region(rd->dfs_region); |
b2e1b302 LR |
2247 | print_rd_rules(rd); |
2248 | } | |
2249 | ||
2df78167 | 2250 | static void print_regdomain_info(const struct ieee80211_regdomain *rd) |
b2e1b302 | 2251 | { |
e9c0268f | 2252 | pr_info("Regulatory domain: %c%c\n", rd->alpha2[0], rd->alpha2[1]); |
b2e1b302 LR |
2253 | print_rd_rules(rd); |
2254 | } | |
2255 | ||
d2372b31 | 2256 | /* Takes ownership of rd only if it doesn't fail */ |
a3d2eaf0 | 2257 | static int __set_regdom(const struct ieee80211_regdomain *rd) |
b2e1b302 | 2258 | { |
e9763c3c | 2259 | const struct ieee80211_regdomain *regd; |
9c96477d | 2260 | const struct ieee80211_regdomain *intersected_rd = NULL; |
806a9e39 | 2261 | struct wiphy *request_wiphy; |
c492db37 | 2262 | struct regulatory_request *lr = get_last_request(); |
6913b49a | 2263 | |
b2e1b302 LR |
2264 | /* Some basic sanity checks first */ |
2265 | ||
6913b49a JB |
2266 | if (!reg_is_valid_request(rd->alpha2)) |
2267 | return -EINVAL; | |
2268 | ||
b2e1b302 | 2269 | if (is_world_regdom(rd->alpha2)) { |
b2e1b302 LR |
2270 | update_world_regdomain(rd); |
2271 | return 0; | |
2272 | } | |
b2e1b302 LR |
2273 | |
2274 | if (!is_alpha2_set(rd->alpha2) && !is_an_alpha2(rd->alpha2) && | |
1a919318 | 2275 | !is_unknown_alpha2(rd->alpha2)) |
b2e1b302 LR |
2276 | return -EINVAL; |
2277 | ||
fb1fc7ad LR |
2278 | /* |
2279 | * Lets only bother proceeding on the same alpha2 if the current | |
3f2355cb | 2280 | * rd is non static (it means CRDA was present and was used last) |
fb1fc7ad LR |
2281 | * and the pending request came in from a country IE |
2282 | */ | |
c492db37 | 2283 | if (lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE) { |
fb1fc7ad LR |
2284 | /* |
2285 | * If someone else asked us to change the rd lets only bother | |
2286 | * checking if the alpha2 changes if CRDA was already called | |
2287 | */ | |
baeb66fe | 2288 | if (!regdom_changes(rd->alpha2)) |
95908535 | 2289 | return -EALREADY; |
3f2355cb LR |
2290 | } |
2291 | ||
fb1fc7ad LR |
2292 | /* |
2293 | * Now lets set the regulatory domain, update all driver channels | |
b2e1b302 LR |
2294 | * and finally inform them of what we have done, in case they want |
2295 | * to review or adjust their own settings based on their own | |
fb1fc7ad LR |
2296 | * internal EEPROM data |
2297 | */ | |
b2e1b302 | 2298 | |
8375af3b | 2299 | if (!is_valid_rd(rd)) { |
e9c0268f | 2300 | pr_err("Invalid regulatory domain detected:\n"); |
8375af3b LR |
2301 | print_regdomain_info(rd); |
2302 | return -EINVAL; | |
b2e1b302 LR |
2303 | } |
2304 | ||
c492db37 | 2305 | request_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx); |
0bac71af | 2306 | if (!request_wiphy && |
c492db37 JB |
2307 | (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER || |
2308 | lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE)) { | |
0bac71af | 2309 | schedule_delayed_work(®_timeout, 0); |
de3584bd JB |
2310 | return -ENODEV; |
2311 | } | |
806a9e39 | 2312 | |
c492db37 JB |
2313 | if (!lr->intersect) { |
2314 | if (lr->initiator != NL80211_REGDOM_SET_BY_DRIVER) { | |
379b82f4 | 2315 | reset_regdomains(false, rd); |
3e0c3ff3 LR |
2316 | return 0; |
2317 | } | |
2318 | ||
fb1fc7ad LR |
2319 | /* |
2320 | * For a driver hint, lets copy the regulatory domain the | |
2321 | * driver wanted to the wiphy to deal with conflicts | |
2322 | */ | |
3e0c3ff3 | 2323 | |
558f6d32 LR |
2324 | /* |
2325 | * Userspace could have sent two replies with only | |
2326 | * one kernel request. | |
2327 | */ | |
2328 | if (request_wiphy->regd) | |
2329 | return -EALREADY; | |
3e0c3ff3 | 2330 | |
e9763c3c JB |
2331 | regd = reg_copy_regd(rd); |
2332 | if (IS_ERR(regd)) | |
2333 | return PTR_ERR(regd); | |
3e0c3ff3 | 2334 | |
458f4f9e | 2335 | rcu_assign_pointer(request_wiphy->regd, regd); |
379b82f4 | 2336 | reset_regdomains(false, rd); |
b8295acd LR |
2337 | return 0; |
2338 | } | |
2339 | ||
2340 | /* Intersection requires a bit more work */ | |
2341 | ||
c492db37 | 2342 | if (lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE) { |
458f4f9e | 2343 | intersected_rd = regdom_intersect(rd, get_cfg80211_regdom()); |
9c96477d LR |
2344 | if (!intersected_rd) |
2345 | return -EINVAL; | |
b8295acd | 2346 | |
fb1fc7ad LR |
2347 | /* |
2348 | * We can trash what CRDA provided now. | |
3e0c3ff3 | 2349 | * However if a driver requested this specific regulatory |
fb1fc7ad LR |
2350 | * domain we keep it for its private use |
2351 | */ | |
b7566fc3 LF |
2352 | if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER) { |
2353 | const struct ieee80211_regdomain *tmp; | |
2354 | ||
2355 | tmp = get_wiphy_regdom(request_wiphy); | |
458f4f9e | 2356 | rcu_assign_pointer(request_wiphy->regd, rd); |
b7566fc3 LF |
2357 | rcu_free_regdom(tmp); |
2358 | } else { | |
3e0c3ff3 | 2359 | kfree(rd); |
b7566fc3 | 2360 | } |
3e0c3ff3 | 2361 | |
b8295acd LR |
2362 | rd = NULL; |
2363 | ||
379b82f4 | 2364 | reset_regdomains(false, intersected_rd); |
b8295acd LR |
2365 | |
2366 | return 0; | |
9c96477d LR |
2367 | } |
2368 | ||
f3baed51 | 2369 | return -EINVAL; |
b2e1b302 LR |
2370 | } |
2371 | ||
2372 | ||
fb1fc7ad LR |
2373 | /* |
2374 | * Use this call to set the current regulatory domain. Conflicts with | |
b2e1b302 | 2375 | * multiple drivers can be ironed out later. Caller must've already |
458f4f9e | 2376 | * kmalloc'd the rd structure. |
fb1fc7ad | 2377 | */ |
a3d2eaf0 | 2378 | int set_regdom(const struct ieee80211_regdomain *rd) |
b2e1b302 | 2379 | { |
c492db37 | 2380 | struct regulatory_request *lr; |
b2e1b302 LR |
2381 | int r; |
2382 | ||
c492db37 | 2383 | lr = get_last_request(); |
abc7381b | 2384 | |
b2e1b302 LR |
2385 | /* Note that this doesn't update the wiphys, this is done below */ |
2386 | r = __set_regdom(rd); | |
d2372b31 | 2387 | if (r) { |
95908535 KV |
2388 | if (r == -EALREADY) |
2389 | reg_set_request_processed(); | |
2390 | ||
d2372b31 | 2391 | kfree(rd); |
38fd2143 | 2392 | return r; |
d2372b31 | 2393 | } |
b2e1b302 | 2394 | |
b2e1b302 | 2395 | /* This would make this whole thing pointless */ |
38fd2143 JB |
2396 | if (WARN_ON(!lr->intersect && rd != get_cfg80211_regdom())) |
2397 | return -EINVAL; | |
b2e1b302 LR |
2398 | |
2399 | /* update all wiphys now with the new established regulatory domain */ | |
c492db37 | 2400 | update_all_wiphy_regulatory(lr->initiator); |
b2e1b302 | 2401 | |
458f4f9e | 2402 | print_regdomain(get_cfg80211_regdom()); |
b2e1b302 | 2403 | |
c492db37 | 2404 | nl80211_send_reg_change_event(lr); |
73d54c9e | 2405 | |
b2e253cf LR |
2406 | reg_set_request_processed(); |
2407 | ||
38fd2143 | 2408 | return 0; |
b2e1b302 LR |
2409 | } |
2410 | ||
4d9d88d1 SJR |
2411 | int reg_device_uevent(struct device *dev, struct kobj_uevent_env *env) |
2412 | { | |
4a484cff JB |
2413 | struct regulatory_request *lr; |
2414 | u8 alpha2[2]; | |
2415 | bool add = false; | |
c492db37 | 2416 | |
4a484cff JB |
2417 | rcu_read_lock(); |
2418 | lr = get_last_request(); | |
c492db37 | 2419 | if (lr && !lr->processed) { |
4a484cff JB |
2420 | memcpy(alpha2, lr->alpha2, 2); |
2421 | add = true; | |
4d9d88d1 | 2422 | } |
4a484cff | 2423 | rcu_read_unlock(); |
4d9d88d1 | 2424 | |
4a484cff JB |
2425 | if (add) |
2426 | return add_uevent_var(env, "COUNTRY=%c%c", | |
2427 | alpha2[0], alpha2[1]); | |
4d9d88d1 SJR |
2428 | return 0; |
2429 | } | |
4d9d88d1 | 2430 | |
57b5ce07 LR |
2431 | void wiphy_regulatory_register(struct wiphy *wiphy) |
2432 | { | |
23df0b73 AN |
2433 | struct regulatory_request *lr; |
2434 | ||
57b5ce07 LR |
2435 | if (!reg_dev_ignore_cell_hint(wiphy)) |
2436 | reg_num_devs_support_basehint++; | |
2437 | ||
23df0b73 AN |
2438 | lr = get_last_request(); |
2439 | wiphy_update_regulatory(wiphy, lr->initiator); | |
57b5ce07 LR |
2440 | } |
2441 | ||
bfead080 | 2442 | void wiphy_regulatory_deregister(struct wiphy *wiphy) |
3f2355cb | 2443 | { |
0ad8acaf | 2444 | struct wiphy *request_wiphy = NULL; |
c492db37 | 2445 | struct regulatory_request *lr; |
761cf7ec | 2446 | |
c492db37 | 2447 | lr = get_last_request(); |
abc7381b | 2448 | |
57b5ce07 LR |
2449 | if (!reg_dev_ignore_cell_hint(wiphy)) |
2450 | reg_num_devs_support_basehint--; | |
2451 | ||
458f4f9e JB |
2452 | rcu_free_regdom(get_wiphy_regdom(wiphy)); |
2453 | rcu_assign_pointer(wiphy->regd, NULL); | |
0ef9ccdd | 2454 | |
c492db37 JB |
2455 | if (lr) |
2456 | request_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx); | |
806a9e39 | 2457 | |
0ef9ccdd | 2458 | if (!request_wiphy || request_wiphy != wiphy) |
38fd2143 | 2459 | return; |
0ef9ccdd | 2460 | |
c492db37 JB |
2461 | lr->wiphy_idx = WIPHY_IDX_INVALID; |
2462 | lr->country_ie_env = ENVIRON_ANY; | |
3f2355cb LR |
2463 | } |
2464 | ||
a90c7a31 LR |
2465 | static void reg_timeout_work(struct work_struct *work) |
2466 | { | |
1a919318 | 2467 | REG_DBG_PRINT("Timeout while waiting for CRDA to reply, restoring regulatory settings\n"); |
f77b86d7 | 2468 | rtnl_lock(); |
a90c7a31 | 2469 | restore_regulatory_settings(true); |
f77b86d7 | 2470 | rtnl_unlock(); |
a90c7a31 LR |
2471 | } |
2472 | ||
2fcc9f73 | 2473 | int __init regulatory_init(void) |
b2e1b302 | 2474 | { |
bcf4f99b | 2475 | int err = 0; |
734366de | 2476 | |
b2e1b302 LR |
2477 | reg_pdev = platform_device_register_simple("regulatory", 0, NULL, 0); |
2478 | if (IS_ERR(reg_pdev)) | |
2479 | return PTR_ERR(reg_pdev); | |
734366de | 2480 | |
4d9d88d1 SJR |
2481 | reg_pdev->dev.type = ®_device_type; |
2482 | ||
fe33eb39 | 2483 | spin_lock_init(®_requests_lock); |
e38f8a7a | 2484 | spin_lock_init(®_pending_beacons_lock); |
fe33eb39 | 2485 | |
80007efe LR |
2486 | reg_regdb_size_check(); |
2487 | ||
458f4f9e | 2488 | rcu_assign_pointer(cfg80211_regdomain, cfg80211_world_regdom); |
734366de | 2489 | |
09d989d1 LR |
2490 | user_alpha2[0] = '9'; |
2491 | user_alpha2[1] = '7'; | |
2492 | ||
ae9e4b0d | 2493 | /* We always try to get an update for the static regdomain */ |
458f4f9e | 2494 | err = regulatory_hint_core(cfg80211_world_regdom->alpha2); |
ba25c141 | 2495 | if (err) { |
bcf4f99b LR |
2496 | if (err == -ENOMEM) |
2497 | return err; | |
2498 | /* | |
2499 | * N.B. kobject_uevent_env() can fail mainly for when we're out | |
2500 | * memory which is handled and propagated appropriately above | |
2501 | * but it can also fail during a netlink_broadcast() or during | |
2502 | * early boot for call_usermodehelper(). For now treat these | |
2503 | * errors as non-fatal. | |
2504 | */ | |
e9c0268f | 2505 | pr_err("kobject_uevent_env() was unable to call CRDA during init\n"); |
bcf4f99b | 2506 | } |
734366de | 2507 | |
ae9e4b0d LR |
2508 | /* |
2509 | * Finally, if the user set the module parameter treat it | |
2510 | * as a user hint. | |
2511 | */ | |
2512 | if (!is_world_regdom(ieee80211_regdom)) | |
57b5ce07 LR |
2513 | regulatory_hint_user(ieee80211_regdom, |
2514 | NL80211_USER_REG_HINT_USER); | |
ae9e4b0d | 2515 | |
b2e1b302 LR |
2516 | return 0; |
2517 | } | |
2518 | ||
1a919318 | 2519 | void regulatory_exit(void) |
b2e1b302 | 2520 | { |
fe33eb39 | 2521 | struct regulatory_request *reg_request, *tmp; |
e38f8a7a | 2522 | struct reg_beacon *reg_beacon, *btmp; |
fe33eb39 LR |
2523 | |
2524 | cancel_work_sync(®_work); | |
a90c7a31 | 2525 | cancel_delayed_work_sync(®_timeout); |
fe33eb39 | 2526 | |
9027b149 | 2527 | /* Lock to suppress warnings */ |
38fd2143 | 2528 | rtnl_lock(); |
379b82f4 | 2529 | reset_regdomains(true, NULL); |
38fd2143 | 2530 | rtnl_unlock(); |
734366de | 2531 | |
58ebacc6 | 2532 | dev_set_uevent_suppress(®_pdev->dev, true); |
f6037d09 | 2533 | |
b2e1b302 | 2534 | platform_device_unregister(reg_pdev); |
734366de | 2535 | |
fea9bced JB |
2536 | list_for_each_entry_safe(reg_beacon, btmp, ®_pending_beacons, list) { |
2537 | list_del(®_beacon->list); | |
2538 | kfree(reg_beacon); | |
e38f8a7a | 2539 | } |
e38f8a7a | 2540 | |
fea9bced JB |
2541 | list_for_each_entry_safe(reg_beacon, btmp, ®_beacon_list, list) { |
2542 | list_del(®_beacon->list); | |
2543 | kfree(reg_beacon); | |
e38f8a7a LR |
2544 | } |
2545 | ||
fea9bced JB |
2546 | list_for_each_entry_safe(reg_request, tmp, ®_requests_list, list) { |
2547 | list_del(®_request->list); | |
2548 | kfree(reg_request); | |
fe33eb39 | 2549 | } |
8318d78a | 2550 | } |