2 * Copyright 2002-2005, Instant802 Networks, Inc.
3 * Copyright 2005-2006, Devicescape Software, Inc.
4 * Copyright 2007 Johannes Berg <johannes@sipsolutions.net>
5 * Copyright 2008-2011 Luis R. Rodriguez <mcgrof@qca.qualcomm.com>
6 * Copyright 2013-2014 Intel Mobile Communications GmbH
8 * Permission to use, copy, modify, and/or distribute this software for any
9 * purpose with or without fee is hereby granted, provided that the above
10 * copyright notice and this permission notice appear in all copies.
12 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
13 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
14 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
15 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
16 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
17 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
18 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
23 * DOC: Wireless regulatory infrastructure
25 * The usual implementation is for a driver to read a device EEPROM to
26 * determine which regulatory domain it should be operating under, then
27 * looking up the allowable channels in a driver-local table and finally
28 * registering those channels in the wiphy structure.
30 * Another set of compliance enforcement is for drivers to use their
31 * own compliance limits which can be stored on the EEPROM. The host
32 * driver or firmware may ensure these are used.
34 * In addition to all this we provide an extra layer of regulatory
35 * conformance. For drivers which do not have any regulatory
36 * information CRDA provides the complete regulatory solution.
37 * For others it provides a community effort on further restrictions
38 * to enhance compliance.
40 * Note: When number of rules --> infinity we will not be able to
41 * index on alpha2 any more, instead we'll probably have to
42 * rely on some SHA1 checksum of the regdomain for example.
46 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
48 #include <linux/kernel.h>
49 #include <linux/export.h>
50 #include <linux/slab.h>
51 #include <linux/list.h>
52 #include <linux/ctype.h>
53 #include <linux/nl80211.h>
54 #include <linux/platform_device.h>
55 #include <linux/moduleparam.h>
56 #include <net/cfg80211.h>
64 * Grace period we give before making sure all current interfaces reside on
65 * channels allowed by the current regulatory domain.
67 #define REG_ENFORCE_GRACE_MS 60000
70 * enum reg_request_treatment - regulatory request treatment
72 * @REG_REQ_OK: continue processing the regulatory request
73 * @REG_REQ_IGNORE: ignore the regulatory request
74 * @REG_REQ_INTERSECT: the regulatory domain resulting from this request should
75 * be intersected with the current one.
76 * @REG_REQ_ALREADY_SET: the regulatory request will not change the current
77 * regulatory settings, and no further processing is required.
79 enum reg_request_treatment {
86 static struct regulatory_request core_request_world = {
87 .initiator = NL80211_REGDOM_SET_BY_CORE,
92 .country_ie_env = ENVIRON_ANY,
96 * Receipt of information from last regulatory request,
97 * protected by RTNL (and can be accessed with RCU protection)
99 static struct regulatory_request __rcu *last_request =
100 (void __force __rcu *)&core_request_world;
102 /* To trigger userspace events */
103 static struct platform_device *reg_pdev;
106 * Central wireless core regulatory domains, we only need two,
107 * the current one and a world regulatory domain in case we have no
108 * information to give us an alpha2.
109 * (protected by RTNL, can be read under RCU)
111 const struct ieee80211_regdomain __rcu *cfg80211_regdomain;
114 * Number of devices that registered to the core
115 * that support cellular base station regulatory hints
116 * (protected by RTNL)
118 static int reg_num_devs_support_basehint;
121 * State variable indicating if the platform on which the devices
122 * are attached is operating in an indoor environment. The state variable
123 * is relevant for all registered devices.
125 static bool reg_is_indoor;
126 static spinlock_t reg_indoor_lock;
128 /* Used to track the userspace process controlling the indoor setting */
129 static u32 reg_is_indoor_portid;
131 static void restore_regulatory_settings(bool reset_user);
133 static const struct ieee80211_regdomain *get_cfg80211_regdom(void)
135 return rtnl_dereference(cfg80211_regdomain);
138 const struct ieee80211_regdomain *get_wiphy_regdom(struct wiphy *wiphy)
140 return rtnl_dereference(wiphy->regd);
143 static const char *reg_dfs_region_str(enum nl80211_dfs_regions dfs_region)
145 switch (dfs_region) {
146 case NL80211_DFS_UNSET:
148 case NL80211_DFS_FCC:
150 case NL80211_DFS_ETSI:
158 enum nl80211_dfs_regions reg_get_dfs_region(struct wiphy *wiphy)
160 const struct ieee80211_regdomain *regd = NULL;
161 const struct ieee80211_regdomain *wiphy_regd = NULL;
163 regd = get_cfg80211_regdom();
167 wiphy_regd = get_wiphy_regdom(wiphy);
171 if (wiphy_regd->dfs_region == regd->dfs_region)
174 pr_debug("%s: device specific dfs_region (%s) disagrees with cfg80211's central dfs_region (%s)\n",
175 dev_name(&wiphy->dev),
176 reg_dfs_region_str(wiphy_regd->dfs_region),
177 reg_dfs_region_str(regd->dfs_region));
180 return regd->dfs_region;
183 static void rcu_free_regdom(const struct ieee80211_regdomain *r)
187 kfree_rcu((struct ieee80211_regdomain *)r, rcu_head);
190 static struct regulatory_request *get_last_request(void)
192 return rcu_dereference_rtnl(last_request);
195 /* Used to queue up regulatory hints */
196 static LIST_HEAD(reg_requests_list);
197 static spinlock_t reg_requests_lock;
199 /* Used to queue up beacon hints for review */
200 static LIST_HEAD(reg_pending_beacons);
201 static spinlock_t reg_pending_beacons_lock;
203 /* Used to keep track of processed beacon hints */
204 static LIST_HEAD(reg_beacon_list);
207 struct list_head list;
208 struct ieee80211_channel chan;
211 static void reg_check_chans_work(struct work_struct *work);
212 static DECLARE_DELAYED_WORK(reg_check_chans, reg_check_chans_work);
214 static void reg_todo(struct work_struct *work);
215 static DECLARE_WORK(reg_work, reg_todo);
217 /* We keep a static world regulatory domain in case of the absence of CRDA */
218 static const struct ieee80211_regdomain world_regdom = {
222 /* IEEE 802.11b/g, channels 1..11 */
223 REG_RULE(2412-10, 2462+10, 40, 6, 20, 0),
224 /* IEEE 802.11b/g, channels 12..13. */
225 REG_RULE(2467-10, 2472+10, 20, 6, 20,
226 NL80211_RRF_NO_IR | NL80211_RRF_AUTO_BW),
227 /* IEEE 802.11 channel 14 - Only JP enables
228 * this and for 802.11b only */
229 REG_RULE(2484-10, 2484+10, 20, 6, 20,
231 NL80211_RRF_NO_OFDM),
232 /* IEEE 802.11a, channel 36..48 */
233 REG_RULE(5180-10, 5240+10, 80, 6, 20,
235 NL80211_RRF_AUTO_BW),
237 /* IEEE 802.11a, channel 52..64 - DFS required */
238 REG_RULE(5260-10, 5320+10, 80, 6, 20,
240 NL80211_RRF_AUTO_BW |
243 /* IEEE 802.11a, channel 100..144 - DFS required */
244 REG_RULE(5500-10, 5720+10, 160, 6, 20,
248 /* IEEE 802.11a, channel 149..165 */
249 REG_RULE(5745-10, 5825+10, 80, 6, 20,
252 /* IEEE 802.11ad (60GHz), channels 1..3 */
253 REG_RULE(56160+2160*1-1080, 56160+2160*3+1080, 2160, 0, 0, 0),
257 /* protected by RTNL */
258 static const struct ieee80211_regdomain *cfg80211_world_regdom =
261 static char *ieee80211_regdom = "00";
262 static char user_alpha2[2];
264 module_param(ieee80211_regdom, charp, 0444);
265 MODULE_PARM_DESC(ieee80211_regdom, "IEEE 802.11 regulatory domain code");
267 static void reg_free_request(struct regulatory_request *request)
269 if (request == &core_request_world)
272 if (request != get_last_request())
276 static void reg_free_last_request(void)
278 struct regulatory_request *lr = get_last_request();
280 if (lr != &core_request_world && lr)
281 kfree_rcu(lr, rcu_head);
284 static void reg_update_last_request(struct regulatory_request *request)
286 struct regulatory_request *lr;
288 lr = get_last_request();
292 reg_free_last_request();
293 rcu_assign_pointer(last_request, request);
296 static void reset_regdomains(bool full_reset,
297 const struct ieee80211_regdomain *new_regdom)
299 const struct ieee80211_regdomain *r;
303 r = get_cfg80211_regdom();
305 /* avoid freeing static information or freeing something twice */
306 if (r == cfg80211_world_regdom)
308 if (cfg80211_world_regdom == &world_regdom)
309 cfg80211_world_regdom = NULL;
310 if (r == &world_regdom)
314 rcu_free_regdom(cfg80211_world_regdom);
316 cfg80211_world_regdom = &world_regdom;
317 rcu_assign_pointer(cfg80211_regdomain, new_regdom);
322 reg_update_last_request(&core_request_world);
326 * Dynamic world regulatory domain requested by the wireless
327 * core upon initialization
329 static void update_world_regdomain(const struct ieee80211_regdomain *rd)
331 struct regulatory_request *lr;
333 lr = get_last_request();
337 reset_regdomains(false, rd);
339 cfg80211_world_regdom = rd;
342 bool is_world_regdom(const char *alpha2)
346 return alpha2[0] == '0' && alpha2[1] == '0';
349 static bool is_alpha2_set(const char *alpha2)
353 return alpha2[0] && alpha2[1];
356 static bool is_unknown_alpha2(const char *alpha2)
361 * Special case where regulatory domain was built by driver
362 * but a specific alpha2 cannot be determined
364 return alpha2[0] == '9' && alpha2[1] == '9';
367 static bool is_intersected_alpha2(const char *alpha2)
372 * Special case where regulatory domain is the
373 * result of an intersection between two regulatory domain
376 return alpha2[0] == '9' && alpha2[1] == '8';
379 static bool is_an_alpha2(const char *alpha2)
383 return isalpha(alpha2[0]) && isalpha(alpha2[1]);
386 static bool alpha2_equal(const char *alpha2_x, const char *alpha2_y)
388 if (!alpha2_x || !alpha2_y)
390 return alpha2_x[0] == alpha2_y[0] && alpha2_x[1] == alpha2_y[1];
393 static bool regdom_changes(const char *alpha2)
395 const struct ieee80211_regdomain *r = get_cfg80211_regdom();
399 return !alpha2_equal(r->alpha2, alpha2);
403 * The NL80211_REGDOM_SET_BY_USER regdom alpha2 is cached, this lets
404 * you know if a valid regulatory hint with NL80211_REGDOM_SET_BY_USER
405 * has ever been issued.
407 static bool is_user_regdom_saved(void)
409 if (user_alpha2[0] == '9' && user_alpha2[1] == '7')
412 /* This would indicate a mistake on the design */
413 if (WARN(!is_world_regdom(user_alpha2) && !is_an_alpha2(user_alpha2),
414 "Unexpected user alpha2: %c%c\n",
415 user_alpha2[0], user_alpha2[1]))
421 static const struct ieee80211_regdomain *
422 reg_copy_regd(const struct ieee80211_regdomain *src_regd)
424 struct ieee80211_regdomain *regd;
429 sizeof(struct ieee80211_regdomain) +
430 src_regd->n_reg_rules * sizeof(struct ieee80211_reg_rule);
432 regd = kzalloc(size_of_regd, GFP_KERNEL);
434 return ERR_PTR(-ENOMEM);
436 memcpy(regd, src_regd, sizeof(struct ieee80211_regdomain));
438 for (i = 0; i < src_regd->n_reg_rules; i++)
439 memcpy(®d->reg_rules[i], &src_regd->reg_rules[i],
440 sizeof(struct ieee80211_reg_rule));
445 #ifdef CONFIG_CFG80211_INTERNAL_REGDB
446 struct reg_regdb_apply_request {
447 struct list_head list;
448 const struct ieee80211_regdomain *regdom;
451 static LIST_HEAD(reg_regdb_apply_list);
452 static DEFINE_MUTEX(reg_regdb_apply_mutex);
454 static void reg_regdb_apply(struct work_struct *work)
456 struct reg_regdb_apply_request *request;
460 mutex_lock(®_regdb_apply_mutex);
461 while (!list_empty(®_regdb_apply_list)) {
462 request = list_first_entry(®_regdb_apply_list,
463 struct reg_regdb_apply_request,
465 list_del(&request->list);
467 set_regdom(request->regdom, REGD_SOURCE_INTERNAL_DB);
470 mutex_unlock(®_regdb_apply_mutex);
475 static DECLARE_WORK(reg_regdb_work, reg_regdb_apply);
477 static int reg_query_builtin(const char *alpha2)
479 const struct ieee80211_regdomain *regdom = NULL;
480 struct reg_regdb_apply_request *request;
483 for (i = 0; i < reg_regdb_size; i++) {
484 if (alpha2_equal(alpha2, reg_regdb[i]->alpha2)) {
485 regdom = reg_regdb[i];
493 request = kzalloc(sizeof(struct reg_regdb_apply_request), GFP_KERNEL);
497 request->regdom = reg_copy_regd(regdom);
498 if (IS_ERR_OR_NULL(request->regdom)) {
503 mutex_lock(®_regdb_apply_mutex);
504 list_add_tail(&request->list, ®_regdb_apply_list);
505 mutex_unlock(®_regdb_apply_mutex);
507 schedule_work(®_regdb_work);
512 /* Feel free to add any other sanity checks here */
513 static void reg_regdb_size_check(void)
515 /* We should ideally BUILD_BUG_ON() but then random builds would fail */
516 WARN_ONCE(!reg_regdb_size, "db.txt is empty, you should update it...");
519 static inline void reg_regdb_size_check(void) {}
520 static inline int reg_query_builtin(const char *alpha2)
524 #endif /* CONFIG_CFG80211_INTERNAL_REGDB */
526 #ifdef CONFIG_CFG80211_CRDA_SUPPORT
527 /* Max number of consecutive attempts to communicate with CRDA */
528 #define REG_MAX_CRDA_TIMEOUTS 10
530 static u32 reg_crda_timeouts;
532 static void crda_timeout_work(struct work_struct *work);
533 static DECLARE_DELAYED_WORK(crda_timeout, crda_timeout_work);
535 static void crda_timeout_work(struct work_struct *work)
537 pr_debug("Timeout while waiting for CRDA to reply, restoring regulatory settings\n");
540 restore_regulatory_settings(true);
544 static void cancel_crda_timeout(void)
546 cancel_delayed_work(&crda_timeout);
549 static void cancel_crda_timeout_sync(void)
551 cancel_delayed_work_sync(&crda_timeout);
554 static void reset_crda_timeouts(void)
556 reg_crda_timeouts = 0;
560 * This lets us keep regulatory code which is updated on a regulatory
561 * basis in userspace.
563 static int call_crda(const char *alpha2)
566 char *env[] = { country, NULL };
569 snprintf(country, sizeof(country), "COUNTRY=%c%c",
570 alpha2[0], alpha2[1]);
572 if (reg_crda_timeouts > REG_MAX_CRDA_TIMEOUTS) {
573 pr_debug("Exceeded CRDA call max attempts. Not calling CRDA\n");
577 if (!is_world_regdom((char *) alpha2))
578 pr_debug("Calling CRDA for country: %c%c\n",
579 alpha2[0], alpha2[1]);
581 pr_debug("Calling CRDA to update world regulatory domain\n");
583 ret = kobject_uevent_env(®_pdev->dev.kobj, KOBJ_CHANGE, env);
587 queue_delayed_work(system_power_efficient_wq,
588 &crda_timeout, msecs_to_jiffies(3142));
592 static inline void cancel_crda_timeout(void) {}
593 static inline void cancel_crda_timeout_sync(void) {}
594 static inline void reset_crda_timeouts(void) {}
595 static inline int call_crda(const char *alpha2)
599 #endif /* CONFIG_CFG80211_CRDA_SUPPORT */
601 static bool reg_query_database(struct regulatory_request *request)
603 /* query internal regulatory database (if it exists) */
604 if (reg_query_builtin(request->alpha2) == 0)
607 if (call_crda(request->alpha2) == 0)
613 bool reg_is_valid_request(const char *alpha2)
615 struct regulatory_request *lr = get_last_request();
617 if (!lr || lr->processed)
620 return alpha2_equal(lr->alpha2, alpha2);
623 static const struct ieee80211_regdomain *reg_get_regdomain(struct wiphy *wiphy)
625 struct regulatory_request *lr = get_last_request();
628 * Follow the driver's regulatory domain, if present, unless a country
629 * IE has been processed or a user wants to help complaince further
631 if (lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE &&
632 lr->initiator != NL80211_REGDOM_SET_BY_USER &&
634 return get_wiphy_regdom(wiphy);
636 return get_cfg80211_regdom();
640 reg_get_max_bandwidth_from_range(const struct ieee80211_regdomain *rd,
641 const struct ieee80211_reg_rule *rule)
643 const struct ieee80211_freq_range *freq_range = &rule->freq_range;
644 const struct ieee80211_freq_range *freq_range_tmp;
645 const struct ieee80211_reg_rule *tmp;
646 u32 start_freq, end_freq, idx, no;
648 for (idx = 0; idx < rd->n_reg_rules; idx++)
649 if (rule == &rd->reg_rules[idx])
652 if (idx == rd->n_reg_rules)
659 tmp = &rd->reg_rules[--no];
660 freq_range_tmp = &tmp->freq_range;
662 if (freq_range_tmp->end_freq_khz < freq_range->start_freq_khz)
665 freq_range = freq_range_tmp;
668 start_freq = freq_range->start_freq_khz;
671 freq_range = &rule->freq_range;
674 while (no < rd->n_reg_rules - 1) {
675 tmp = &rd->reg_rules[++no];
676 freq_range_tmp = &tmp->freq_range;
678 if (freq_range_tmp->start_freq_khz > freq_range->end_freq_khz)
681 freq_range = freq_range_tmp;
684 end_freq = freq_range->end_freq_khz;
686 return end_freq - start_freq;
689 unsigned int reg_get_max_bandwidth(const struct ieee80211_regdomain *rd,
690 const struct ieee80211_reg_rule *rule)
692 unsigned int bw = reg_get_max_bandwidth_from_range(rd, rule);
694 if (rule->flags & NL80211_RRF_NO_160MHZ)
695 bw = min_t(unsigned int, bw, MHZ_TO_KHZ(80));
696 if (rule->flags & NL80211_RRF_NO_80MHZ)
697 bw = min_t(unsigned int, bw, MHZ_TO_KHZ(40));
700 * HT40+/HT40- limits are handled per-channel. Only limit BW if both
703 if (rule->flags & NL80211_RRF_NO_HT40MINUS &&
704 rule->flags & NL80211_RRF_NO_HT40PLUS)
705 bw = min_t(unsigned int, bw, MHZ_TO_KHZ(20));
710 /* Sanity check on a regulatory rule */
711 static bool is_valid_reg_rule(const struct ieee80211_reg_rule *rule)
713 const struct ieee80211_freq_range *freq_range = &rule->freq_range;
716 if (freq_range->start_freq_khz <= 0 || freq_range->end_freq_khz <= 0)
719 if (freq_range->start_freq_khz > freq_range->end_freq_khz)
722 freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz;
724 if (freq_range->end_freq_khz <= freq_range->start_freq_khz ||
725 freq_range->max_bandwidth_khz > freq_diff)
731 static bool is_valid_rd(const struct ieee80211_regdomain *rd)
733 const struct ieee80211_reg_rule *reg_rule = NULL;
736 if (!rd->n_reg_rules)
739 if (WARN_ON(rd->n_reg_rules > NL80211_MAX_SUPP_REG_RULES))
742 for (i = 0; i < rd->n_reg_rules; i++) {
743 reg_rule = &rd->reg_rules[i];
744 if (!is_valid_reg_rule(reg_rule))
751 static bool reg_does_bw_fit(const struct ieee80211_freq_range *freq_range,
752 u32 center_freq_khz, u32 bw_khz)
754 u32 start_freq_khz, end_freq_khz;
756 start_freq_khz = center_freq_khz - (bw_khz/2);
757 end_freq_khz = center_freq_khz + (bw_khz/2);
759 if (start_freq_khz >= freq_range->start_freq_khz &&
760 end_freq_khz <= freq_range->end_freq_khz)
767 * freq_in_rule_band - tells us if a frequency is in a frequency band
768 * @freq_range: frequency rule we want to query
769 * @freq_khz: frequency we are inquiring about
771 * This lets us know if a specific frequency rule is or is not relevant to
772 * a specific frequency's band. Bands are device specific and artificial
773 * definitions (the "2.4 GHz band", the "5 GHz band" and the "60GHz band"),
774 * however it is safe for now to assume that a frequency rule should not be
775 * part of a frequency's band if the start freq or end freq are off by more
776 * than 2 GHz for the 2.4 and 5 GHz bands, and by more than 20 GHz for the
778 * This resolution can be lowered and should be considered as we add
779 * regulatory rule support for other "bands".
781 static bool freq_in_rule_band(const struct ieee80211_freq_range *freq_range,
784 #define ONE_GHZ_IN_KHZ 1000000
786 * From 802.11ad: directional multi-gigabit (DMG):
787 * Pertaining to operation in a frequency band containing a channel
788 * with the Channel starting frequency above 45 GHz.
790 u32 limit = freq_khz > 45 * ONE_GHZ_IN_KHZ ?
791 20 * ONE_GHZ_IN_KHZ : 2 * ONE_GHZ_IN_KHZ;
792 if (abs(freq_khz - freq_range->start_freq_khz) <= limit)
794 if (abs(freq_khz - freq_range->end_freq_khz) <= limit)
797 #undef ONE_GHZ_IN_KHZ
801 * Later on we can perhaps use the more restrictive DFS
802 * region but we don't have information for that yet so
803 * for now simply disallow conflicts.
805 static enum nl80211_dfs_regions
806 reg_intersect_dfs_region(const enum nl80211_dfs_regions dfs_region1,
807 const enum nl80211_dfs_regions dfs_region2)
809 if (dfs_region1 != dfs_region2)
810 return NL80211_DFS_UNSET;
815 * Helper for regdom_intersect(), this does the real
816 * mathematical intersection fun
818 static int reg_rules_intersect(const struct ieee80211_regdomain *rd1,
819 const struct ieee80211_regdomain *rd2,
820 const struct ieee80211_reg_rule *rule1,
821 const struct ieee80211_reg_rule *rule2,
822 struct ieee80211_reg_rule *intersected_rule)
824 const struct ieee80211_freq_range *freq_range1, *freq_range2;
825 struct ieee80211_freq_range *freq_range;
826 const struct ieee80211_power_rule *power_rule1, *power_rule2;
827 struct ieee80211_power_rule *power_rule;
828 u32 freq_diff, max_bandwidth1, max_bandwidth2;
830 freq_range1 = &rule1->freq_range;
831 freq_range2 = &rule2->freq_range;
832 freq_range = &intersected_rule->freq_range;
834 power_rule1 = &rule1->power_rule;
835 power_rule2 = &rule2->power_rule;
836 power_rule = &intersected_rule->power_rule;
838 freq_range->start_freq_khz = max(freq_range1->start_freq_khz,
839 freq_range2->start_freq_khz);
840 freq_range->end_freq_khz = min(freq_range1->end_freq_khz,
841 freq_range2->end_freq_khz);
843 max_bandwidth1 = freq_range1->max_bandwidth_khz;
844 max_bandwidth2 = freq_range2->max_bandwidth_khz;
846 if (rule1->flags & NL80211_RRF_AUTO_BW)
847 max_bandwidth1 = reg_get_max_bandwidth(rd1, rule1);
848 if (rule2->flags & NL80211_RRF_AUTO_BW)
849 max_bandwidth2 = reg_get_max_bandwidth(rd2, rule2);
851 freq_range->max_bandwidth_khz = min(max_bandwidth1, max_bandwidth2);
853 intersected_rule->flags = rule1->flags | rule2->flags;
856 * In case NL80211_RRF_AUTO_BW requested for both rules
857 * set AUTO_BW in intersected rule also. Next we will
858 * calculate BW correctly in handle_channel function.
859 * In other case remove AUTO_BW flag while we calculate
860 * maximum bandwidth correctly and auto calculation is
863 if ((rule1->flags & NL80211_RRF_AUTO_BW) &&
864 (rule2->flags & NL80211_RRF_AUTO_BW))
865 intersected_rule->flags |= NL80211_RRF_AUTO_BW;
867 intersected_rule->flags &= ~NL80211_RRF_AUTO_BW;
869 freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz;
870 if (freq_range->max_bandwidth_khz > freq_diff)
871 freq_range->max_bandwidth_khz = freq_diff;
873 power_rule->max_eirp = min(power_rule1->max_eirp,
874 power_rule2->max_eirp);
875 power_rule->max_antenna_gain = min(power_rule1->max_antenna_gain,
876 power_rule2->max_antenna_gain);
878 intersected_rule->dfs_cac_ms = max(rule1->dfs_cac_ms,
881 if (!is_valid_reg_rule(intersected_rule))
887 /* check whether old rule contains new rule */
888 static bool rule_contains(struct ieee80211_reg_rule *r1,
889 struct ieee80211_reg_rule *r2)
891 /* for simplicity, currently consider only same flags */
892 if (r1->flags != r2->flags)
895 /* verify r1 is more restrictive */
896 if ((r1->power_rule.max_antenna_gain >
897 r2->power_rule.max_antenna_gain) ||
898 r1->power_rule.max_eirp > r2->power_rule.max_eirp)
901 /* make sure r2's range is contained within r1 */
902 if (r1->freq_range.start_freq_khz > r2->freq_range.start_freq_khz ||
903 r1->freq_range.end_freq_khz < r2->freq_range.end_freq_khz)
906 /* and finally verify that r1.max_bw >= r2.max_bw */
907 if (r1->freq_range.max_bandwidth_khz <
908 r2->freq_range.max_bandwidth_khz)
914 /* add or extend current rules. do nothing if rule is already contained */
915 static void add_rule(struct ieee80211_reg_rule *rule,
916 struct ieee80211_reg_rule *reg_rules, u32 *n_rules)
918 struct ieee80211_reg_rule *tmp_rule;
921 for (i = 0; i < *n_rules; i++) {
922 tmp_rule = ®_rules[i];
923 /* rule is already contained - do nothing */
924 if (rule_contains(tmp_rule, rule))
927 /* extend rule if possible */
928 if (rule_contains(rule, tmp_rule)) {
929 memcpy(tmp_rule, rule, sizeof(*rule));
934 memcpy(®_rules[*n_rules], rule, sizeof(*rule));
939 * regdom_intersect - do the intersection between two regulatory domains
940 * @rd1: first regulatory domain
941 * @rd2: second regulatory domain
943 * Use this function to get the intersection between two regulatory domains.
944 * Once completed we will mark the alpha2 for the rd as intersected, "98",
945 * as no one single alpha2 can represent this regulatory domain.
947 * Returns a pointer to the regulatory domain structure which will hold the
948 * resulting intersection of rules between rd1 and rd2. We will
949 * kzalloc() this structure for you.
951 static struct ieee80211_regdomain *
952 regdom_intersect(const struct ieee80211_regdomain *rd1,
953 const struct ieee80211_regdomain *rd2)
957 unsigned int num_rules = 0;
958 const struct ieee80211_reg_rule *rule1, *rule2;
959 struct ieee80211_reg_rule intersected_rule;
960 struct ieee80211_regdomain *rd;
966 * First we get a count of the rules we'll need, then we actually
967 * build them. This is to so we can malloc() and free() a
968 * regdomain once. The reason we use reg_rules_intersect() here
969 * is it will return -EINVAL if the rule computed makes no sense.
970 * All rules that do check out OK are valid.
973 for (x = 0; x < rd1->n_reg_rules; x++) {
974 rule1 = &rd1->reg_rules[x];
975 for (y = 0; y < rd2->n_reg_rules; y++) {
976 rule2 = &rd2->reg_rules[y];
977 if (!reg_rules_intersect(rd1, rd2, rule1, rule2,
986 size_of_regd = sizeof(struct ieee80211_regdomain) +
987 num_rules * sizeof(struct ieee80211_reg_rule);
989 rd = kzalloc(size_of_regd, GFP_KERNEL);
993 for (x = 0; x < rd1->n_reg_rules; x++) {
994 rule1 = &rd1->reg_rules[x];
995 for (y = 0; y < rd2->n_reg_rules; y++) {
996 rule2 = &rd2->reg_rules[y];
997 r = reg_rules_intersect(rd1, rd2, rule1, rule2,
1000 * No need to memset here the intersected rule here as
1001 * we're not using the stack anymore
1006 add_rule(&intersected_rule, rd->reg_rules,
1011 rd->alpha2[0] = '9';
1012 rd->alpha2[1] = '8';
1013 rd->dfs_region = reg_intersect_dfs_region(rd1->dfs_region,
1020 * XXX: add support for the rest of enum nl80211_reg_rule_flags, we may
1021 * want to just have the channel structure use these
1023 static u32 map_regdom_flags(u32 rd_flags)
1025 u32 channel_flags = 0;
1026 if (rd_flags & NL80211_RRF_NO_IR_ALL)
1027 channel_flags |= IEEE80211_CHAN_NO_IR;
1028 if (rd_flags & NL80211_RRF_DFS)
1029 channel_flags |= IEEE80211_CHAN_RADAR;
1030 if (rd_flags & NL80211_RRF_NO_OFDM)
1031 channel_flags |= IEEE80211_CHAN_NO_OFDM;
1032 if (rd_flags & NL80211_RRF_NO_OUTDOOR)
1033 channel_flags |= IEEE80211_CHAN_INDOOR_ONLY;
1034 if (rd_flags & NL80211_RRF_IR_CONCURRENT)
1035 channel_flags |= IEEE80211_CHAN_IR_CONCURRENT;
1036 if (rd_flags & NL80211_RRF_NO_HT40MINUS)
1037 channel_flags |= IEEE80211_CHAN_NO_HT40MINUS;
1038 if (rd_flags & NL80211_RRF_NO_HT40PLUS)
1039 channel_flags |= IEEE80211_CHAN_NO_HT40PLUS;
1040 if (rd_flags & NL80211_RRF_NO_80MHZ)
1041 channel_flags |= IEEE80211_CHAN_NO_80MHZ;
1042 if (rd_flags & NL80211_RRF_NO_160MHZ)
1043 channel_flags |= IEEE80211_CHAN_NO_160MHZ;
1044 return channel_flags;
1047 static const struct ieee80211_reg_rule *
1048 freq_reg_info_regd(u32 center_freq,
1049 const struct ieee80211_regdomain *regd, u32 bw)
1052 bool band_rule_found = false;
1053 bool bw_fits = false;
1056 return ERR_PTR(-EINVAL);
1058 for (i = 0; i < regd->n_reg_rules; i++) {
1059 const struct ieee80211_reg_rule *rr;
1060 const struct ieee80211_freq_range *fr = NULL;
1062 rr = ®d->reg_rules[i];
1063 fr = &rr->freq_range;
1066 * We only need to know if one frequency rule was
1067 * was in center_freq's band, that's enough, so lets
1068 * not overwrite it once found
1070 if (!band_rule_found)
1071 band_rule_found = freq_in_rule_band(fr, center_freq);
1073 bw_fits = reg_does_bw_fit(fr, center_freq, bw);
1075 if (band_rule_found && bw_fits)
1079 if (!band_rule_found)
1080 return ERR_PTR(-ERANGE);
1082 return ERR_PTR(-EINVAL);
1085 static const struct ieee80211_reg_rule *
1086 __freq_reg_info(struct wiphy *wiphy, u32 center_freq, u32 min_bw)
1088 const struct ieee80211_regdomain *regd = reg_get_regdomain(wiphy);
1089 const struct ieee80211_reg_rule *reg_rule = NULL;
1092 for (bw = MHZ_TO_KHZ(20); bw >= min_bw; bw = bw / 2) {
1093 reg_rule = freq_reg_info_regd(center_freq, regd, bw);
1094 if (!IS_ERR(reg_rule))
1101 const struct ieee80211_reg_rule *freq_reg_info(struct wiphy *wiphy,
1104 return __freq_reg_info(wiphy, center_freq, MHZ_TO_KHZ(20));
1106 EXPORT_SYMBOL(freq_reg_info);
1108 const char *reg_initiator_name(enum nl80211_reg_initiator initiator)
1110 switch (initiator) {
1111 case NL80211_REGDOM_SET_BY_CORE:
1113 case NL80211_REGDOM_SET_BY_USER:
1115 case NL80211_REGDOM_SET_BY_DRIVER:
1117 case NL80211_REGDOM_SET_BY_COUNTRY_IE:
1118 return "country IE";
1124 EXPORT_SYMBOL(reg_initiator_name);
1126 static uint32_t reg_rule_to_chan_bw_flags(const struct ieee80211_regdomain *regd,
1127 const struct ieee80211_reg_rule *reg_rule,
1128 const struct ieee80211_channel *chan)
1130 const struct ieee80211_freq_range *freq_range = NULL;
1131 u32 max_bandwidth_khz, bw_flags = 0;
1133 freq_range = ®_rule->freq_range;
1135 max_bandwidth_khz = freq_range->max_bandwidth_khz;
1136 /* Check if auto calculation requested */
1137 if (reg_rule->flags & NL80211_RRF_AUTO_BW)
1138 max_bandwidth_khz = reg_get_max_bandwidth(regd, reg_rule);
1140 /* If we get a reg_rule we can assume that at least 5Mhz fit */
1141 if (!reg_does_bw_fit(freq_range, MHZ_TO_KHZ(chan->center_freq),
1143 bw_flags |= IEEE80211_CHAN_NO_10MHZ;
1144 if (!reg_does_bw_fit(freq_range, MHZ_TO_KHZ(chan->center_freq),
1146 bw_flags |= IEEE80211_CHAN_NO_20MHZ;
1148 if (max_bandwidth_khz < MHZ_TO_KHZ(10))
1149 bw_flags |= IEEE80211_CHAN_NO_10MHZ;
1150 if (max_bandwidth_khz < MHZ_TO_KHZ(20))
1151 bw_flags |= IEEE80211_CHAN_NO_20MHZ;
1152 if (max_bandwidth_khz < MHZ_TO_KHZ(40))
1153 bw_flags |= IEEE80211_CHAN_NO_HT40;
1154 if (max_bandwidth_khz < MHZ_TO_KHZ(80))
1155 bw_flags |= IEEE80211_CHAN_NO_80MHZ;
1156 if (max_bandwidth_khz < MHZ_TO_KHZ(160))
1157 bw_flags |= IEEE80211_CHAN_NO_160MHZ;
1162 * Note that right now we assume the desired channel bandwidth
1163 * is always 20 MHz for each individual channel (HT40 uses 20 MHz
1164 * per channel, the primary and the extension channel).
1166 static void handle_channel(struct wiphy *wiphy,
1167 enum nl80211_reg_initiator initiator,
1168 struct ieee80211_channel *chan)
1170 u32 flags, bw_flags = 0;
1171 const struct ieee80211_reg_rule *reg_rule = NULL;
1172 const struct ieee80211_power_rule *power_rule = NULL;
1173 struct wiphy *request_wiphy = NULL;
1174 struct regulatory_request *lr = get_last_request();
1175 const struct ieee80211_regdomain *regd;
1177 request_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx);
1179 flags = chan->orig_flags;
1181 reg_rule = freq_reg_info(wiphy, MHZ_TO_KHZ(chan->center_freq));
1182 if (IS_ERR(reg_rule)) {
1184 * We will disable all channels that do not match our
1185 * received regulatory rule unless the hint is coming
1186 * from a Country IE and the Country IE had no information
1187 * about a band. The IEEE 802.11 spec allows for an AP
1188 * to send only a subset of the regulatory rules allowed,
1189 * so an AP in the US that only supports 2.4 GHz may only send
1190 * a country IE with information for the 2.4 GHz band
1191 * while 5 GHz is still supported.
1193 if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE &&
1194 PTR_ERR(reg_rule) == -ERANGE)
1197 if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER &&
1198 request_wiphy && request_wiphy == wiphy &&
1199 request_wiphy->regulatory_flags & REGULATORY_STRICT_REG) {
1200 pr_debug("Disabling freq %d MHz for good\n",
1202 chan->orig_flags |= IEEE80211_CHAN_DISABLED;
1203 chan->flags = chan->orig_flags;
1205 pr_debug("Disabling freq %d MHz\n",
1207 chan->flags |= IEEE80211_CHAN_DISABLED;
1212 regd = reg_get_regdomain(wiphy);
1214 power_rule = ®_rule->power_rule;
1215 bw_flags = reg_rule_to_chan_bw_flags(regd, reg_rule, chan);
1217 if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER &&
1218 request_wiphy && request_wiphy == wiphy &&
1219 request_wiphy->regulatory_flags & REGULATORY_STRICT_REG) {
1221 * This guarantees the driver's requested regulatory domain
1222 * will always be used as a base for further regulatory
1225 chan->flags = chan->orig_flags =
1226 map_regdom_flags(reg_rule->flags) | bw_flags;
1227 chan->max_antenna_gain = chan->orig_mag =
1228 (int) MBI_TO_DBI(power_rule->max_antenna_gain);
1229 chan->max_reg_power = chan->max_power = chan->orig_mpwr =
1230 (int) MBM_TO_DBM(power_rule->max_eirp);
1232 if (chan->flags & IEEE80211_CHAN_RADAR) {
1233 chan->dfs_cac_ms = IEEE80211_DFS_MIN_CAC_TIME_MS;
1234 if (reg_rule->dfs_cac_ms)
1235 chan->dfs_cac_ms = reg_rule->dfs_cac_ms;
1241 chan->dfs_state = NL80211_DFS_USABLE;
1242 chan->dfs_state_entered = jiffies;
1244 chan->beacon_found = false;
1245 chan->flags = flags | bw_flags | map_regdom_flags(reg_rule->flags);
1246 chan->max_antenna_gain =
1247 min_t(int, chan->orig_mag,
1248 MBI_TO_DBI(power_rule->max_antenna_gain));
1249 chan->max_reg_power = (int) MBM_TO_DBM(power_rule->max_eirp);
1251 if (chan->flags & IEEE80211_CHAN_RADAR) {
1252 if (reg_rule->dfs_cac_ms)
1253 chan->dfs_cac_ms = reg_rule->dfs_cac_ms;
1255 chan->dfs_cac_ms = IEEE80211_DFS_MIN_CAC_TIME_MS;
1258 if (chan->orig_mpwr) {
1260 * Devices that use REGULATORY_COUNTRY_IE_FOLLOW_POWER
1261 * will always follow the passed country IE power settings.
1263 if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE &&
1264 wiphy->regulatory_flags & REGULATORY_COUNTRY_IE_FOLLOW_POWER)
1265 chan->max_power = chan->max_reg_power;
1267 chan->max_power = min(chan->orig_mpwr,
1268 chan->max_reg_power);
1270 chan->max_power = chan->max_reg_power;
1273 static void handle_band(struct wiphy *wiphy,
1274 enum nl80211_reg_initiator initiator,
1275 struct ieee80211_supported_band *sband)
1282 for (i = 0; i < sband->n_channels; i++)
1283 handle_channel(wiphy, initiator, &sband->channels[i]);
1286 static bool reg_request_cell_base(struct regulatory_request *request)
1288 if (request->initiator != NL80211_REGDOM_SET_BY_USER)
1290 return request->user_reg_hint_type == NL80211_USER_REG_HINT_CELL_BASE;
1293 bool reg_last_request_cell_base(void)
1295 return reg_request_cell_base(get_last_request());
1298 #ifdef CONFIG_CFG80211_REG_CELLULAR_HINTS
1299 /* Core specific check */
1300 static enum reg_request_treatment
1301 reg_ignore_cell_hint(struct regulatory_request *pending_request)
1303 struct regulatory_request *lr = get_last_request();
1305 if (!reg_num_devs_support_basehint)
1306 return REG_REQ_IGNORE;
1308 if (reg_request_cell_base(lr) &&
1309 !regdom_changes(pending_request->alpha2))
1310 return REG_REQ_ALREADY_SET;
1315 /* Device specific check */
1316 static bool reg_dev_ignore_cell_hint(struct wiphy *wiphy)
1318 return !(wiphy->features & NL80211_FEATURE_CELL_BASE_REG_HINTS);
1321 static enum reg_request_treatment
1322 reg_ignore_cell_hint(struct regulatory_request *pending_request)
1324 return REG_REQ_IGNORE;
1327 static bool reg_dev_ignore_cell_hint(struct wiphy *wiphy)
1333 static bool wiphy_strict_alpha2_regd(struct wiphy *wiphy)
1335 if (wiphy->regulatory_flags & REGULATORY_STRICT_REG &&
1336 !(wiphy->regulatory_flags & REGULATORY_CUSTOM_REG))
1341 static bool ignore_reg_update(struct wiphy *wiphy,
1342 enum nl80211_reg_initiator initiator)
1344 struct regulatory_request *lr = get_last_request();
1346 if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED)
1350 pr_debug("Ignoring regulatory request set by %s since last_request is not set\n",
1351 reg_initiator_name(initiator));
1355 if (initiator == NL80211_REGDOM_SET_BY_CORE &&
1356 wiphy->regulatory_flags & REGULATORY_CUSTOM_REG) {
1357 pr_debug("Ignoring regulatory request set by %s since the driver uses its own custom regulatory domain\n",
1358 reg_initiator_name(initiator));
1363 * wiphy->regd will be set once the device has its own
1364 * desired regulatory domain set
1366 if (wiphy_strict_alpha2_regd(wiphy) && !wiphy->regd &&
1367 initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE &&
1368 !is_world_regdom(lr->alpha2)) {
1369 pr_debug("Ignoring regulatory request set by %s since the driver requires its own regulatory domain to be set first\n",
1370 reg_initiator_name(initiator));
1374 if (reg_request_cell_base(lr))
1375 return reg_dev_ignore_cell_hint(wiphy);
1380 static bool reg_is_world_roaming(struct wiphy *wiphy)
1382 const struct ieee80211_regdomain *cr = get_cfg80211_regdom();
1383 const struct ieee80211_regdomain *wr = get_wiphy_regdom(wiphy);
1384 struct regulatory_request *lr = get_last_request();
1386 if (is_world_regdom(cr->alpha2) || (wr && is_world_regdom(wr->alpha2)))
1389 if (lr && lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE &&
1390 wiphy->regulatory_flags & REGULATORY_CUSTOM_REG)
1396 static void handle_reg_beacon(struct wiphy *wiphy, unsigned int chan_idx,
1397 struct reg_beacon *reg_beacon)
1399 struct ieee80211_supported_band *sband;
1400 struct ieee80211_channel *chan;
1401 bool channel_changed = false;
1402 struct ieee80211_channel chan_before;
1404 sband = wiphy->bands[reg_beacon->chan.band];
1405 chan = &sband->channels[chan_idx];
1407 if (likely(chan->center_freq != reg_beacon->chan.center_freq))
1410 if (chan->beacon_found)
1413 chan->beacon_found = true;
1415 if (!reg_is_world_roaming(wiphy))
1418 if (wiphy->regulatory_flags & REGULATORY_DISABLE_BEACON_HINTS)
1421 chan_before.center_freq = chan->center_freq;
1422 chan_before.flags = chan->flags;
1424 if (chan->flags & IEEE80211_CHAN_NO_IR) {
1425 chan->flags &= ~IEEE80211_CHAN_NO_IR;
1426 channel_changed = true;
1429 if (channel_changed)
1430 nl80211_send_beacon_hint_event(wiphy, &chan_before, chan);
1434 * Called when a scan on a wiphy finds a beacon on
1437 static void wiphy_update_new_beacon(struct wiphy *wiphy,
1438 struct reg_beacon *reg_beacon)
1441 struct ieee80211_supported_band *sband;
1443 if (!wiphy->bands[reg_beacon->chan.band])
1446 sband = wiphy->bands[reg_beacon->chan.band];
1448 for (i = 0; i < sband->n_channels; i++)
1449 handle_reg_beacon(wiphy, i, reg_beacon);
1453 * Called upon reg changes or a new wiphy is added
1455 static void wiphy_update_beacon_reg(struct wiphy *wiphy)
1458 struct ieee80211_supported_band *sband;
1459 struct reg_beacon *reg_beacon;
1461 list_for_each_entry(reg_beacon, ®_beacon_list, list) {
1462 if (!wiphy->bands[reg_beacon->chan.band])
1464 sband = wiphy->bands[reg_beacon->chan.band];
1465 for (i = 0; i < sband->n_channels; i++)
1466 handle_reg_beacon(wiphy, i, reg_beacon);
1470 /* Reap the advantages of previously found beacons */
1471 static void reg_process_beacons(struct wiphy *wiphy)
1474 * Means we are just firing up cfg80211, so no beacons would
1475 * have been processed yet.
1479 wiphy_update_beacon_reg(wiphy);
1482 static bool is_ht40_allowed(struct ieee80211_channel *chan)
1486 if (chan->flags & IEEE80211_CHAN_DISABLED)
1488 /* This would happen when regulatory rules disallow HT40 completely */
1489 if ((chan->flags & IEEE80211_CHAN_NO_HT40) == IEEE80211_CHAN_NO_HT40)
1494 static void reg_process_ht_flags_channel(struct wiphy *wiphy,
1495 struct ieee80211_channel *channel)
1497 struct ieee80211_supported_band *sband = wiphy->bands[channel->band];
1498 struct ieee80211_channel *channel_before = NULL, *channel_after = NULL;
1501 if (!is_ht40_allowed(channel)) {
1502 channel->flags |= IEEE80211_CHAN_NO_HT40;
1507 * We need to ensure the extension channels exist to
1508 * be able to use HT40- or HT40+, this finds them (or not)
1510 for (i = 0; i < sband->n_channels; i++) {
1511 struct ieee80211_channel *c = &sband->channels[i];
1513 if (c->center_freq == (channel->center_freq - 20))
1515 if (c->center_freq == (channel->center_freq + 20))
1520 * Please note that this assumes target bandwidth is 20 MHz,
1521 * if that ever changes we also need to change the below logic
1522 * to include that as well.
1524 if (!is_ht40_allowed(channel_before))
1525 channel->flags |= IEEE80211_CHAN_NO_HT40MINUS;
1527 channel->flags &= ~IEEE80211_CHAN_NO_HT40MINUS;
1529 if (!is_ht40_allowed(channel_after))
1530 channel->flags |= IEEE80211_CHAN_NO_HT40PLUS;
1532 channel->flags &= ~IEEE80211_CHAN_NO_HT40PLUS;
1535 static void reg_process_ht_flags_band(struct wiphy *wiphy,
1536 struct ieee80211_supported_band *sband)
1543 for (i = 0; i < sband->n_channels; i++)
1544 reg_process_ht_flags_channel(wiphy, &sband->channels[i]);
1547 static void reg_process_ht_flags(struct wiphy *wiphy)
1549 enum nl80211_band band;
1554 for (band = 0; band < NUM_NL80211_BANDS; band++)
1555 reg_process_ht_flags_band(wiphy, wiphy->bands[band]);
1558 static void reg_call_notifier(struct wiphy *wiphy,
1559 struct regulatory_request *request)
1561 if (wiphy->reg_notifier)
1562 wiphy->reg_notifier(wiphy, request);
1565 static bool reg_wdev_chan_valid(struct wiphy *wiphy, struct wireless_dev *wdev)
1567 struct cfg80211_chan_def chandef = {};
1568 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
1569 enum nl80211_iftype iftype;
1572 iftype = wdev->iftype;
1574 /* make sure the interface is active */
1575 if (!wdev->netdev || !netif_running(wdev->netdev))
1576 goto wdev_inactive_unlock;
1579 case NL80211_IFTYPE_AP:
1580 case NL80211_IFTYPE_P2P_GO:
1581 if (!wdev->beacon_interval)
1582 goto wdev_inactive_unlock;
1583 chandef = wdev->chandef;
1585 case NL80211_IFTYPE_ADHOC:
1586 if (!wdev->ssid_len)
1587 goto wdev_inactive_unlock;
1588 chandef = wdev->chandef;
1590 case NL80211_IFTYPE_STATION:
1591 case NL80211_IFTYPE_P2P_CLIENT:
1592 if (!wdev->current_bss ||
1593 !wdev->current_bss->pub.channel)
1594 goto wdev_inactive_unlock;
1596 if (!rdev->ops->get_channel ||
1597 rdev_get_channel(rdev, wdev, &chandef))
1598 cfg80211_chandef_create(&chandef,
1599 wdev->current_bss->pub.channel,
1600 NL80211_CHAN_NO_HT);
1602 case NL80211_IFTYPE_MONITOR:
1603 case NL80211_IFTYPE_AP_VLAN:
1604 case NL80211_IFTYPE_P2P_DEVICE:
1605 /* no enforcement required */
1608 /* others not implemented for now */
1616 case NL80211_IFTYPE_AP:
1617 case NL80211_IFTYPE_P2P_GO:
1618 case NL80211_IFTYPE_ADHOC:
1619 return cfg80211_reg_can_beacon_relax(wiphy, &chandef, iftype);
1620 case NL80211_IFTYPE_STATION:
1621 case NL80211_IFTYPE_P2P_CLIENT:
1622 return cfg80211_chandef_usable(wiphy, &chandef,
1623 IEEE80211_CHAN_DISABLED);
1630 wdev_inactive_unlock:
1635 static void reg_leave_invalid_chans(struct wiphy *wiphy)
1637 struct wireless_dev *wdev;
1638 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
1642 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list)
1643 if (!reg_wdev_chan_valid(wiphy, wdev))
1644 cfg80211_leave(rdev, wdev);
1647 static void reg_check_chans_work(struct work_struct *work)
1649 struct cfg80211_registered_device *rdev;
1651 pr_debug("Verifying active interfaces after reg change\n");
1654 list_for_each_entry(rdev, &cfg80211_rdev_list, list)
1655 if (!(rdev->wiphy.regulatory_flags &
1656 REGULATORY_IGNORE_STALE_KICKOFF))
1657 reg_leave_invalid_chans(&rdev->wiphy);
1662 static void reg_check_channels(void)
1665 * Give usermode a chance to do something nicer (move to another
1666 * channel, orderly disconnection), before forcing a disconnection.
1668 mod_delayed_work(system_power_efficient_wq,
1670 msecs_to_jiffies(REG_ENFORCE_GRACE_MS));
1673 static void wiphy_update_regulatory(struct wiphy *wiphy,
1674 enum nl80211_reg_initiator initiator)
1676 enum nl80211_band band;
1677 struct regulatory_request *lr = get_last_request();
1679 if (ignore_reg_update(wiphy, initiator)) {
1681 * Regulatory updates set by CORE are ignored for custom
1682 * regulatory cards. Let us notify the changes to the driver,
1683 * as some drivers used this to restore its orig_* reg domain.
1685 if (initiator == NL80211_REGDOM_SET_BY_CORE &&
1686 wiphy->regulatory_flags & REGULATORY_CUSTOM_REG)
1687 reg_call_notifier(wiphy, lr);
1691 lr->dfs_region = get_cfg80211_regdom()->dfs_region;
1693 for (band = 0; band < NUM_NL80211_BANDS; band++)
1694 handle_band(wiphy, initiator, wiphy->bands[band]);
1696 reg_process_beacons(wiphy);
1697 reg_process_ht_flags(wiphy);
1698 reg_call_notifier(wiphy, lr);
1701 static void update_all_wiphy_regulatory(enum nl80211_reg_initiator initiator)
1703 struct cfg80211_registered_device *rdev;
1704 struct wiphy *wiphy;
1708 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
1709 wiphy = &rdev->wiphy;
1710 wiphy_update_regulatory(wiphy, initiator);
1713 reg_check_channels();
1716 static void handle_channel_custom(struct wiphy *wiphy,
1717 struct ieee80211_channel *chan,
1718 const struct ieee80211_regdomain *regd,
1722 const struct ieee80211_reg_rule *reg_rule = NULL;
1723 const struct ieee80211_power_rule *power_rule = NULL;
1726 for (bw = MHZ_TO_KHZ(20); bw >= min_bw; bw = bw / 2) {
1727 reg_rule = freq_reg_info_regd(MHZ_TO_KHZ(chan->center_freq),
1729 if (!IS_ERR(reg_rule))
1733 if (IS_ERR_OR_NULL(reg_rule)) {
1734 pr_debug("Disabling freq %d MHz as custom regd has no rule that fits it\n",
1736 if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) {
1737 chan->flags |= IEEE80211_CHAN_DISABLED;
1739 chan->orig_flags |= IEEE80211_CHAN_DISABLED;
1740 chan->flags = chan->orig_flags;
1745 power_rule = ®_rule->power_rule;
1746 bw_flags = reg_rule_to_chan_bw_flags(regd, reg_rule, chan);
1748 chan->dfs_state_entered = jiffies;
1749 chan->dfs_state = NL80211_DFS_USABLE;
1751 chan->beacon_found = false;
1753 if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED)
1754 chan->flags = chan->orig_flags | bw_flags |
1755 map_regdom_flags(reg_rule->flags);
1757 chan->flags |= map_regdom_flags(reg_rule->flags) | bw_flags;
1759 chan->max_antenna_gain = (int) MBI_TO_DBI(power_rule->max_antenna_gain);
1760 chan->max_reg_power = chan->max_power =
1761 (int) MBM_TO_DBM(power_rule->max_eirp);
1763 if (chan->flags & IEEE80211_CHAN_RADAR) {
1764 if (reg_rule->dfs_cac_ms)
1765 chan->dfs_cac_ms = reg_rule->dfs_cac_ms;
1767 chan->dfs_cac_ms = IEEE80211_DFS_MIN_CAC_TIME_MS;
1770 chan->max_power = chan->max_reg_power;
1773 static void handle_band_custom(struct wiphy *wiphy,
1774 struct ieee80211_supported_band *sband,
1775 const struct ieee80211_regdomain *regd)
1783 * We currently assume that you always want at least 20 MHz,
1784 * otherwise channel 12 might get enabled if this rule is
1785 * compatible to US, which permits 2402 - 2472 MHz.
1787 for (i = 0; i < sband->n_channels; i++)
1788 handle_channel_custom(wiphy, &sband->channels[i], regd,
1792 /* Used by drivers prior to wiphy registration */
1793 void wiphy_apply_custom_regulatory(struct wiphy *wiphy,
1794 const struct ieee80211_regdomain *regd)
1796 enum nl80211_band band;
1797 unsigned int bands_set = 0;
1799 WARN(!(wiphy->regulatory_flags & REGULATORY_CUSTOM_REG),
1800 "wiphy should have REGULATORY_CUSTOM_REG\n");
1801 wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG;
1803 for (band = 0; band < NUM_NL80211_BANDS; band++) {
1804 if (!wiphy->bands[band])
1806 handle_band_custom(wiphy, wiphy->bands[band], regd);
1811 * no point in calling this if it won't have any effect
1812 * on your device's supported bands.
1814 WARN_ON(!bands_set);
1816 EXPORT_SYMBOL(wiphy_apply_custom_regulatory);
1818 static void reg_set_request_processed(void)
1820 bool need_more_processing = false;
1821 struct regulatory_request *lr = get_last_request();
1823 lr->processed = true;
1825 spin_lock(®_requests_lock);
1826 if (!list_empty(®_requests_list))
1827 need_more_processing = true;
1828 spin_unlock(®_requests_lock);
1830 cancel_crda_timeout();
1832 if (need_more_processing)
1833 schedule_work(®_work);
1837 * reg_process_hint_core - process core regulatory requests
1838 * @pending_request: a pending core regulatory request
1840 * The wireless subsystem can use this function to process
1841 * a regulatory request issued by the regulatory core.
1843 static enum reg_request_treatment
1844 reg_process_hint_core(struct regulatory_request *core_request)
1846 if (reg_query_database(core_request)) {
1847 core_request->intersect = false;
1848 core_request->processed = false;
1849 reg_update_last_request(core_request);
1853 return REG_REQ_IGNORE;
1856 static enum reg_request_treatment
1857 __reg_process_hint_user(struct regulatory_request *user_request)
1859 struct regulatory_request *lr = get_last_request();
1861 if (reg_request_cell_base(user_request))
1862 return reg_ignore_cell_hint(user_request);
1864 if (reg_request_cell_base(lr))
1865 return REG_REQ_IGNORE;
1867 if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE)
1868 return REG_REQ_INTERSECT;
1870 * If the user knows better the user should set the regdom
1871 * to their country before the IE is picked up
1873 if (lr->initiator == NL80211_REGDOM_SET_BY_USER &&
1875 return REG_REQ_IGNORE;
1877 * Process user requests only after previous user/driver/core
1878 * requests have been processed
1880 if ((lr->initiator == NL80211_REGDOM_SET_BY_CORE ||
1881 lr->initiator == NL80211_REGDOM_SET_BY_DRIVER ||
1882 lr->initiator == NL80211_REGDOM_SET_BY_USER) &&
1883 regdom_changes(lr->alpha2))
1884 return REG_REQ_IGNORE;
1886 if (!regdom_changes(user_request->alpha2))
1887 return REG_REQ_ALREADY_SET;
1893 * reg_process_hint_user - process user regulatory requests
1894 * @user_request: a pending user regulatory request
1896 * The wireless subsystem can use this function to process
1897 * a regulatory request initiated by userspace.
1899 static enum reg_request_treatment
1900 reg_process_hint_user(struct regulatory_request *user_request)
1902 enum reg_request_treatment treatment;
1904 treatment = __reg_process_hint_user(user_request);
1905 if (treatment == REG_REQ_IGNORE ||
1906 treatment == REG_REQ_ALREADY_SET)
1907 return REG_REQ_IGNORE;
1909 user_request->intersect = treatment == REG_REQ_INTERSECT;
1910 user_request->processed = false;
1912 if (reg_query_database(user_request)) {
1913 reg_update_last_request(user_request);
1914 user_alpha2[0] = user_request->alpha2[0];
1915 user_alpha2[1] = user_request->alpha2[1];
1919 return REG_REQ_IGNORE;
1922 static enum reg_request_treatment
1923 __reg_process_hint_driver(struct regulatory_request *driver_request)
1925 struct regulatory_request *lr = get_last_request();
1927 if (lr->initiator == NL80211_REGDOM_SET_BY_CORE) {
1928 if (regdom_changes(driver_request->alpha2))
1930 return REG_REQ_ALREADY_SET;
1934 * This would happen if you unplug and plug your card
1935 * back in or if you add a new device for which the previously
1936 * loaded card also agrees on the regulatory domain.
1938 if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER &&
1939 !regdom_changes(driver_request->alpha2))
1940 return REG_REQ_ALREADY_SET;
1942 return REG_REQ_INTERSECT;
1946 * reg_process_hint_driver - process driver regulatory requests
1947 * @driver_request: a pending driver regulatory request
1949 * The wireless subsystem can use this function to process
1950 * a regulatory request issued by an 802.11 driver.
1952 * Returns one of the different reg request treatment values.
1954 static enum reg_request_treatment
1955 reg_process_hint_driver(struct wiphy *wiphy,
1956 struct regulatory_request *driver_request)
1958 const struct ieee80211_regdomain *regd, *tmp;
1959 enum reg_request_treatment treatment;
1961 treatment = __reg_process_hint_driver(driver_request);
1963 switch (treatment) {
1966 case REG_REQ_IGNORE:
1967 return REG_REQ_IGNORE;
1968 case REG_REQ_INTERSECT:
1969 case REG_REQ_ALREADY_SET:
1970 regd = reg_copy_regd(get_cfg80211_regdom());
1972 return REG_REQ_IGNORE;
1974 tmp = get_wiphy_regdom(wiphy);
1975 rcu_assign_pointer(wiphy->regd, regd);
1976 rcu_free_regdom(tmp);
1980 driver_request->intersect = treatment == REG_REQ_INTERSECT;
1981 driver_request->processed = false;
1984 * Since CRDA will not be called in this case as we already
1985 * have applied the requested regulatory domain before we just
1986 * inform userspace we have processed the request
1988 if (treatment == REG_REQ_ALREADY_SET) {
1989 nl80211_send_reg_change_event(driver_request);
1990 reg_update_last_request(driver_request);
1991 reg_set_request_processed();
1992 return REG_REQ_ALREADY_SET;
1995 if (reg_query_database(driver_request)) {
1996 reg_update_last_request(driver_request);
2000 return REG_REQ_IGNORE;
2003 static enum reg_request_treatment
2004 __reg_process_hint_country_ie(struct wiphy *wiphy,
2005 struct regulatory_request *country_ie_request)
2007 struct wiphy *last_wiphy = NULL;
2008 struct regulatory_request *lr = get_last_request();
2010 if (reg_request_cell_base(lr)) {
2011 /* Trust a Cell base station over the AP's country IE */
2012 if (regdom_changes(country_ie_request->alpha2))
2013 return REG_REQ_IGNORE;
2014 return REG_REQ_ALREADY_SET;
2016 if (wiphy->regulatory_flags & REGULATORY_COUNTRY_IE_IGNORE)
2017 return REG_REQ_IGNORE;
2020 if (unlikely(!is_an_alpha2(country_ie_request->alpha2)))
2023 if (lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE)
2026 last_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx);
2028 if (last_wiphy != wiphy) {
2030 * Two cards with two APs claiming different
2031 * Country IE alpha2s. We could
2032 * intersect them, but that seems unlikely
2033 * to be correct. Reject second one for now.
2035 if (regdom_changes(country_ie_request->alpha2))
2036 return REG_REQ_IGNORE;
2037 return REG_REQ_ALREADY_SET;
2040 if (regdom_changes(country_ie_request->alpha2))
2042 return REG_REQ_ALREADY_SET;
2046 * reg_process_hint_country_ie - process regulatory requests from country IEs
2047 * @country_ie_request: a regulatory request from a country IE
2049 * The wireless subsystem can use this function to process
2050 * a regulatory request issued by a country Information Element.
2052 * Returns one of the different reg request treatment values.
2054 static enum reg_request_treatment
2055 reg_process_hint_country_ie(struct wiphy *wiphy,
2056 struct regulatory_request *country_ie_request)
2058 enum reg_request_treatment treatment;
2060 treatment = __reg_process_hint_country_ie(wiphy, country_ie_request);
2062 switch (treatment) {
2065 case REG_REQ_IGNORE:
2066 return REG_REQ_IGNORE;
2067 case REG_REQ_ALREADY_SET:
2068 reg_free_request(country_ie_request);
2069 return REG_REQ_ALREADY_SET;
2070 case REG_REQ_INTERSECT:
2072 * This doesn't happen yet, not sure we
2073 * ever want to support it for this case.
2075 WARN_ONCE(1, "Unexpected intersection for country IEs");
2076 return REG_REQ_IGNORE;
2079 country_ie_request->intersect = false;
2080 country_ie_request->processed = false;
2082 if (reg_query_database(country_ie_request)) {
2083 reg_update_last_request(country_ie_request);
2087 return REG_REQ_IGNORE;
2090 /* This processes *all* regulatory hints */
2091 static void reg_process_hint(struct regulatory_request *reg_request)
2093 struct wiphy *wiphy = NULL;
2094 enum reg_request_treatment treatment;
2096 if (reg_request->wiphy_idx != WIPHY_IDX_INVALID)
2097 wiphy = wiphy_idx_to_wiphy(reg_request->wiphy_idx);
2099 switch (reg_request->initiator) {
2100 case NL80211_REGDOM_SET_BY_CORE:
2101 treatment = reg_process_hint_core(reg_request);
2103 case NL80211_REGDOM_SET_BY_USER:
2104 treatment = reg_process_hint_user(reg_request);
2106 case NL80211_REGDOM_SET_BY_DRIVER:
2109 treatment = reg_process_hint_driver(wiphy, reg_request);
2111 case NL80211_REGDOM_SET_BY_COUNTRY_IE:
2114 treatment = reg_process_hint_country_ie(wiphy, reg_request);
2117 WARN(1, "invalid initiator %d\n", reg_request->initiator);
2121 if (treatment == REG_REQ_IGNORE)
2124 WARN(treatment != REG_REQ_OK && treatment != REG_REQ_ALREADY_SET,
2125 "unexpected treatment value %d\n", treatment);
2127 /* This is required so that the orig_* parameters are saved.
2128 * NOTE: treatment must be set for any case that reaches here!
2130 if (treatment == REG_REQ_ALREADY_SET && wiphy &&
2131 wiphy->regulatory_flags & REGULATORY_STRICT_REG) {
2132 wiphy_update_regulatory(wiphy, reg_request->initiator);
2133 reg_check_channels();
2139 reg_free_request(reg_request);
2142 static bool reg_only_self_managed_wiphys(void)
2144 struct cfg80211_registered_device *rdev;
2145 struct wiphy *wiphy;
2146 bool self_managed_found = false;
2150 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
2151 wiphy = &rdev->wiphy;
2152 if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED)
2153 self_managed_found = true;
2158 /* make sure at least one self-managed wiphy exists */
2159 return self_managed_found;
2163 * Processes regulatory hints, this is all the NL80211_REGDOM_SET_BY_*
2164 * Regulatory hints come on a first come first serve basis and we
2165 * must process each one atomically.
2167 static void reg_process_pending_hints(void)
2169 struct regulatory_request *reg_request, *lr;
2171 lr = get_last_request();
2173 /* When last_request->processed becomes true this will be rescheduled */
2174 if (lr && !lr->processed) {
2175 pr_debug("Pending regulatory request, waiting for it to be processed...\n");
2179 spin_lock(®_requests_lock);
2181 if (list_empty(®_requests_list)) {
2182 spin_unlock(®_requests_lock);
2186 reg_request = list_first_entry(®_requests_list,
2187 struct regulatory_request,
2189 list_del_init(®_request->list);
2191 spin_unlock(®_requests_lock);
2193 if (reg_only_self_managed_wiphys()) {
2194 reg_free_request(reg_request);
2198 reg_process_hint(reg_request);
2200 lr = get_last_request();
2202 spin_lock(®_requests_lock);
2203 if (!list_empty(®_requests_list) && lr && lr->processed)
2204 schedule_work(®_work);
2205 spin_unlock(®_requests_lock);
2208 /* Processes beacon hints -- this has nothing to do with country IEs */
2209 static void reg_process_pending_beacon_hints(void)
2211 struct cfg80211_registered_device *rdev;
2212 struct reg_beacon *pending_beacon, *tmp;
2214 /* This goes through the _pending_ beacon list */
2215 spin_lock_bh(®_pending_beacons_lock);
2217 list_for_each_entry_safe(pending_beacon, tmp,
2218 ®_pending_beacons, list) {
2219 list_del_init(&pending_beacon->list);
2221 /* Applies the beacon hint to current wiphys */
2222 list_for_each_entry(rdev, &cfg80211_rdev_list, list)
2223 wiphy_update_new_beacon(&rdev->wiphy, pending_beacon);
2225 /* Remembers the beacon hint for new wiphys or reg changes */
2226 list_add_tail(&pending_beacon->list, ®_beacon_list);
2229 spin_unlock_bh(®_pending_beacons_lock);
2232 static void reg_process_self_managed_hints(void)
2234 struct cfg80211_registered_device *rdev;
2235 struct wiphy *wiphy;
2236 const struct ieee80211_regdomain *tmp;
2237 const struct ieee80211_regdomain *regd;
2238 enum nl80211_band band;
2239 struct regulatory_request request = {};
2241 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
2242 wiphy = &rdev->wiphy;
2244 spin_lock(®_requests_lock);
2245 regd = rdev->requested_regd;
2246 rdev->requested_regd = NULL;
2247 spin_unlock(®_requests_lock);
2252 tmp = get_wiphy_regdom(wiphy);
2253 rcu_assign_pointer(wiphy->regd, regd);
2254 rcu_free_regdom(tmp);
2256 for (band = 0; band < NUM_NL80211_BANDS; band++)
2257 handle_band_custom(wiphy, wiphy->bands[band], regd);
2259 reg_process_ht_flags(wiphy);
2261 request.wiphy_idx = get_wiphy_idx(wiphy);
2262 request.alpha2[0] = regd->alpha2[0];
2263 request.alpha2[1] = regd->alpha2[1];
2264 request.initiator = NL80211_REGDOM_SET_BY_DRIVER;
2266 nl80211_send_wiphy_reg_change_event(&request);
2269 reg_check_channels();
2272 static void reg_todo(struct work_struct *work)
2275 reg_process_pending_hints();
2276 reg_process_pending_beacon_hints();
2277 reg_process_self_managed_hints();
2281 static void queue_regulatory_request(struct regulatory_request *request)
2283 request->alpha2[0] = toupper(request->alpha2[0]);
2284 request->alpha2[1] = toupper(request->alpha2[1]);
2286 spin_lock(®_requests_lock);
2287 list_add_tail(&request->list, ®_requests_list);
2288 spin_unlock(®_requests_lock);
2290 schedule_work(®_work);
2294 * Core regulatory hint -- happens during cfg80211_init()
2295 * and when we restore regulatory settings.
2297 static int regulatory_hint_core(const char *alpha2)
2299 struct regulatory_request *request;
2301 request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL);
2305 request->alpha2[0] = alpha2[0];
2306 request->alpha2[1] = alpha2[1];
2307 request->initiator = NL80211_REGDOM_SET_BY_CORE;
2308 request->wiphy_idx = WIPHY_IDX_INVALID;
2310 queue_regulatory_request(request);
2316 int regulatory_hint_user(const char *alpha2,
2317 enum nl80211_user_reg_hint_type user_reg_hint_type)
2319 struct regulatory_request *request;
2321 if (WARN_ON(!alpha2))
2324 if (!is_world_regdom(alpha2) && !is_an_alpha2(alpha2))
2327 request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL);
2331 request->wiphy_idx = WIPHY_IDX_INVALID;
2332 request->alpha2[0] = alpha2[0];
2333 request->alpha2[1] = alpha2[1];
2334 request->initiator = NL80211_REGDOM_SET_BY_USER;
2335 request->user_reg_hint_type = user_reg_hint_type;
2337 /* Allow calling CRDA again */
2338 reset_crda_timeouts();
2340 queue_regulatory_request(request);
2345 int regulatory_hint_indoor(bool is_indoor, u32 portid)
2347 spin_lock(®_indoor_lock);
2349 /* It is possible that more than one user space process is trying to
2350 * configure the indoor setting. To handle such cases, clear the indoor
2351 * setting in case that some process does not think that the device
2352 * is operating in an indoor environment. In addition, if a user space
2353 * process indicates that it is controlling the indoor setting, save its
2354 * portid, i.e., make it the owner.
2356 reg_is_indoor = is_indoor;
2357 if (reg_is_indoor) {
2358 if (!reg_is_indoor_portid)
2359 reg_is_indoor_portid = portid;
2361 reg_is_indoor_portid = 0;
2364 spin_unlock(®_indoor_lock);
2367 reg_check_channels();
2372 void regulatory_netlink_notify(u32 portid)
2374 spin_lock(®_indoor_lock);
2376 if (reg_is_indoor_portid != portid) {
2377 spin_unlock(®_indoor_lock);
2381 reg_is_indoor = false;
2382 reg_is_indoor_portid = 0;
2384 spin_unlock(®_indoor_lock);
2386 reg_check_channels();
2390 int regulatory_hint(struct wiphy *wiphy, const char *alpha2)
2392 struct regulatory_request *request;
2394 if (WARN_ON(!alpha2 || !wiphy))
2397 wiphy->regulatory_flags &= ~REGULATORY_CUSTOM_REG;
2399 request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL);
2403 request->wiphy_idx = get_wiphy_idx(wiphy);
2405 request->alpha2[0] = alpha2[0];
2406 request->alpha2[1] = alpha2[1];
2407 request->initiator = NL80211_REGDOM_SET_BY_DRIVER;
2409 /* Allow calling CRDA again */
2410 reset_crda_timeouts();
2412 queue_regulatory_request(request);
2416 EXPORT_SYMBOL(regulatory_hint);
2418 void regulatory_hint_country_ie(struct wiphy *wiphy, enum nl80211_band band,
2419 const u8 *country_ie, u8 country_ie_len)
2422 enum environment_cap env = ENVIRON_ANY;
2423 struct regulatory_request *request = NULL, *lr;
2425 /* IE len must be evenly divisible by 2 */
2426 if (country_ie_len & 0x01)
2429 if (country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
2432 request = kzalloc(sizeof(*request), GFP_KERNEL);
2436 alpha2[0] = country_ie[0];
2437 alpha2[1] = country_ie[1];
2439 if (country_ie[2] == 'I')
2440 env = ENVIRON_INDOOR;
2441 else if (country_ie[2] == 'O')
2442 env = ENVIRON_OUTDOOR;
2445 lr = get_last_request();
2451 * We will run this only upon a successful connection on cfg80211.
2452 * We leave conflict resolution to the workqueue, where can hold
2455 if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE &&
2456 lr->wiphy_idx != WIPHY_IDX_INVALID)
2459 request->wiphy_idx = get_wiphy_idx(wiphy);
2460 request->alpha2[0] = alpha2[0];
2461 request->alpha2[1] = alpha2[1];
2462 request->initiator = NL80211_REGDOM_SET_BY_COUNTRY_IE;
2463 request->country_ie_env = env;
2465 /* Allow calling CRDA again */
2466 reset_crda_timeouts();
2468 queue_regulatory_request(request);
2475 static void restore_alpha2(char *alpha2, bool reset_user)
2477 /* indicates there is no alpha2 to consider for restoration */
2481 /* The user setting has precedence over the module parameter */
2482 if (is_user_regdom_saved()) {
2483 /* Unless we're asked to ignore it and reset it */
2485 pr_debug("Restoring regulatory settings including user preference\n");
2486 user_alpha2[0] = '9';
2487 user_alpha2[1] = '7';
2490 * If we're ignoring user settings, we still need to
2491 * check the module parameter to ensure we put things
2492 * back as they were for a full restore.
2494 if (!is_world_regdom(ieee80211_regdom)) {
2495 pr_debug("Keeping preference on module parameter ieee80211_regdom: %c%c\n",
2496 ieee80211_regdom[0], ieee80211_regdom[1]);
2497 alpha2[0] = ieee80211_regdom[0];
2498 alpha2[1] = ieee80211_regdom[1];
2501 pr_debug("Restoring regulatory settings while preserving user preference for: %c%c\n",
2502 user_alpha2[0], user_alpha2[1]);
2503 alpha2[0] = user_alpha2[0];
2504 alpha2[1] = user_alpha2[1];
2506 } else if (!is_world_regdom(ieee80211_regdom)) {
2507 pr_debug("Keeping preference on module parameter ieee80211_regdom: %c%c\n",
2508 ieee80211_regdom[0], ieee80211_regdom[1]);
2509 alpha2[0] = ieee80211_regdom[0];
2510 alpha2[1] = ieee80211_regdom[1];
2512 pr_debug("Restoring regulatory settings\n");
2515 static void restore_custom_reg_settings(struct wiphy *wiphy)
2517 struct ieee80211_supported_band *sband;
2518 enum nl80211_band band;
2519 struct ieee80211_channel *chan;
2522 for (band = 0; band < NUM_NL80211_BANDS; band++) {
2523 sband = wiphy->bands[band];
2526 for (i = 0; i < sband->n_channels; i++) {
2527 chan = &sband->channels[i];
2528 chan->flags = chan->orig_flags;
2529 chan->max_antenna_gain = chan->orig_mag;
2530 chan->max_power = chan->orig_mpwr;
2531 chan->beacon_found = false;
2537 * Restoring regulatory settings involves ingoring any
2538 * possibly stale country IE information and user regulatory
2539 * settings if so desired, this includes any beacon hints
2540 * learned as we could have traveled outside to another country
2541 * after disconnection. To restore regulatory settings we do
2542 * exactly what we did at bootup:
2544 * - send a core regulatory hint
2545 * - send a user regulatory hint if applicable
2547 * Device drivers that send a regulatory hint for a specific country
2548 * keep their own regulatory domain on wiphy->regd so that does does
2549 * not need to be remembered.
2551 static void restore_regulatory_settings(bool reset_user)
2554 char world_alpha2[2];
2555 struct reg_beacon *reg_beacon, *btmp;
2556 LIST_HEAD(tmp_reg_req_list);
2557 struct cfg80211_registered_device *rdev;
2562 * Clear the indoor setting in case that it is not controlled by user
2563 * space, as otherwise there is no guarantee that the device is still
2564 * operating in an indoor environment.
2566 spin_lock(®_indoor_lock);
2567 if (reg_is_indoor && !reg_is_indoor_portid) {
2568 reg_is_indoor = false;
2569 reg_check_channels();
2571 spin_unlock(®_indoor_lock);
2573 reset_regdomains(true, &world_regdom);
2574 restore_alpha2(alpha2, reset_user);
2577 * If there's any pending requests we simply
2578 * stash them to a temporary pending queue and
2579 * add then after we've restored regulatory
2582 spin_lock(®_requests_lock);
2583 list_splice_tail_init(®_requests_list, &tmp_reg_req_list);
2584 spin_unlock(®_requests_lock);
2586 /* Clear beacon hints */
2587 spin_lock_bh(®_pending_beacons_lock);
2588 list_for_each_entry_safe(reg_beacon, btmp, ®_pending_beacons, list) {
2589 list_del(®_beacon->list);
2592 spin_unlock_bh(®_pending_beacons_lock);
2594 list_for_each_entry_safe(reg_beacon, btmp, ®_beacon_list, list) {
2595 list_del(®_beacon->list);
2599 /* First restore to the basic regulatory settings */
2600 world_alpha2[0] = cfg80211_world_regdom->alpha2[0];
2601 world_alpha2[1] = cfg80211_world_regdom->alpha2[1];
2603 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
2604 if (rdev->wiphy.regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED)
2606 if (rdev->wiphy.regulatory_flags & REGULATORY_CUSTOM_REG)
2607 restore_custom_reg_settings(&rdev->wiphy);
2610 regulatory_hint_core(world_alpha2);
2613 * This restores the ieee80211_regdom module parameter
2614 * preference or the last user requested regulatory
2615 * settings, user regulatory settings takes precedence.
2617 if (is_an_alpha2(alpha2))
2618 regulatory_hint_user(alpha2, NL80211_USER_REG_HINT_USER);
2620 spin_lock(®_requests_lock);
2621 list_splice_tail_init(&tmp_reg_req_list, ®_requests_list);
2622 spin_unlock(®_requests_lock);
2624 pr_debug("Kicking the queue\n");
2626 schedule_work(®_work);
2629 static bool is_wiphy_all_set_reg_flag(enum ieee80211_regulatory_flags flag)
2631 struct cfg80211_registered_device *rdev;
2632 struct wireless_dev *wdev;
2634 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
2635 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
2637 if (!(wdev->wiphy->regulatory_flags & flag)) {
2648 void regulatory_hint_disconnect(void)
2650 /* Restore of regulatory settings is not required when wiphy(s)
2651 * ignore IE from connected access point but clearance of beacon hints
2652 * is required when wiphy(s) supports beacon hints.
2654 if (is_wiphy_all_set_reg_flag(REGULATORY_COUNTRY_IE_IGNORE)) {
2655 struct reg_beacon *reg_beacon, *btmp;
2657 if (is_wiphy_all_set_reg_flag(REGULATORY_DISABLE_BEACON_HINTS))
2660 spin_lock_bh(®_pending_beacons_lock);
2661 list_for_each_entry_safe(reg_beacon, btmp,
2662 ®_pending_beacons, list) {
2663 list_del(®_beacon->list);
2666 spin_unlock_bh(®_pending_beacons_lock);
2668 list_for_each_entry_safe(reg_beacon, btmp,
2669 ®_beacon_list, list) {
2670 list_del(®_beacon->list);
2677 pr_debug("All devices are disconnected, going to restore regulatory settings\n");
2678 restore_regulatory_settings(false);
2681 static bool freq_is_chan_12_13_14(u16 freq)
2683 if (freq == ieee80211_channel_to_frequency(12, NL80211_BAND_2GHZ) ||
2684 freq == ieee80211_channel_to_frequency(13, NL80211_BAND_2GHZ) ||
2685 freq == ieee80211_channel_to_frequency(14, NL80211_BAND_2GHZ))
2690 static bool pending_reg_beacon(struct ieee80211_channel *beacon_chan)
2692 struct reg_beacon *pending_beacon;
2694 list_for_each_entry(pending_beacon, ®_pending_beacons, list)
2695 if (beacon_chan->center_freq ==
2696 pending_beacon->chan.center_freq)
2701 int regulatory_hint_found_beacon(struct wiphy *wiphy,
2702 struct ieee80211_channel *beacon_chan,
2705 struct reg_beacon *reg_beacon;
2708 if (beacon_chan->beacon_found ||
2709 beacon_chan->flags & IEEE80211_CHAN_RADAR ||
2710 (beacon_chan->band == NL80211_BAND_2GHZ &&
2711 !freq_is_chan_12_13_14(beacon_chan->center_freq)))
2714 spin_lock_bh(®_pending_beacons_lock);
2715 processing = pending_reg_beacon(beacon_chan);
2716 spin_unlock_bh(®_pending_beacons_lock);
2721 reg_beacon = kzalloc(sizeof(struct reg_beacon), gfp);
2725 pr_debug("Found new beacon on frequency: %d MHz (Ch %d) on %s\n",
2726 beacon_chan->center_freq,
2727 ieee80211_frequency_to_channel(beacon_chan->center_freq),
2730 memcpy(®_beacon->chan, beacon_chan,
2731 sizeof(struct ieee80211_channel));
2734 * Since we can be called from BH or and non-BH context
2735 * we must use spin_lock_bh()
2737 spin_lock_bh(®_pending_beacons_lock);
2738 list_add_tail(®_beacon->list, ®_pending_beacons);
2739 spin_unlock_bh(®_pending_beacons_lock);
2741 schedule_work(®_work);
2746 static void print_rd_rules(const struct ieee80211_regdomain *rd)
2749 const struct ieee80211_reg_rule *reg_rule = NULL;
2750 const struct ieee80211_freq_range *freq_range = NULL;
2751 const struct ieee80211_power_rule *power_rule = NULL;
2752 char bw[32], cac_time[32];
2754 pr_debug(" (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp), (dfs_cac_time)\n");
2756 for (i = 0; i < rd->n_reg_rules; i++) {
2757 reg_rule = &rd->reg_rules[i];
2758 freq_range = ®_rule->freq_range;
2759 power_rule = ®_rule->power_rule;
2761 if (reg_rule->flags & NL80211_RRF_AUTO_BW)
2762 snprintf(bw, sizeof(bw), "%d KHz, %u KHz AUTO",
2763 freq_range->max_bandwidth_khz,
2764 reg_get_max_bandwidth(rd, reg_rule));
2766 snprintf(bw, sizeof(bw), "%d KHz",
2767 freq_range->max_bandwidth_khz);
2769 if (reg_rule->flags & NL80211_RRF_DFS)
2770 scnprintf(cac_time, sizeof(cac_time), "%u s",
2771 reg_rule->dfs_cac_ms/1000);
2773 scnprintf(cac_time, sizeof(cac_time), "N/A");
2777 * There may not be documentation for max antenna gain
2778 * in certain regions
2780 if (power_rule->max_antenna_gain)
2781 pr_debug(" (%d KHz - %d KHz @ %s), (%d mBi, %d mBm), (%s)\n",
2782 freq_range->start_freq_khz,
2783 freq_range->end_freq_khz,
2785 power_rule->max_antenna_gain,
2786 power_rule->max_eirp,
2789 pr_debug(" (%d KHz - %d KHz @ %s), (N/A, %d mBm), (%s)\n",
2790 freq_range->start_freq_khz,
2791 freq_range->end_freq_khz,
2793 power_rule->max_eirp,
2798 bool reg_supported_dfs_region(enum nl80211_dfs_regions dfs_region)
2800 switch (dfs_region) {
2801 case NL80211_DFS_UNSET:
2802 case NL80211_DFS_FCC:
2803 case NL80211_DFS_ETSI:
2804 case NL80211_DFS_JP:
2807 pr_debug("Ignoring uknown DFS master region: %d\n", dfs_region);
2812 static void print_regdomain(const struct ieee80211_regdomain *rd)
2814 struct regulatory_request *lr = get_last_request();
2816 if (is_intersected_alpha2(rd->alpha2)) {
2817 if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) {
2818 struct cfg80211_registered_device *rdev;
2819 rdev = cfg80211_rdev_by_wiphy_idx(lr->wiphy_idx);
2821 pr_debug("Current regulatory domain updated by AP to: %c%c\n",
2822 rdev->country_ie_alpha2[0],
2823 rdev->country_ie_alpha2[1]);
2825 pr_debug("Current regulatory domain intersected:\n");
2827 pr_debug("Current regulatory domain intersected:\n");
2828 } else if (is_world_regdom(rd->alpha2)) {
2829 pr_debug("World regulatory domain updated:\n");
2831 if (is_unknown_alpha2(rd->alpha2))
2832 pr_debug("Regulatory domain changed to driver built-in settings (unknown country)\n");
2834 if (reg_request_cell_base(lr))
2835 pr_debug("Regulatory domain changed to country: %c%c by Cell Station\n",
2836 rd->alpha2[0], rd->alpha2[1]);
2838 pr_debug("Regulatory domain changed to country: %c%c\n",
2839 rd->alpha2[0], rd->alpha2[1]);
2843 pr_debug(" DFS Master region: %s", reg_dfs_region_str(rd->dfs_region));
2847 static void print_regdomain_info(const struct ieee80211_regdomain *rd)
2849 pr_debug("Regulatory domain: %c%c\n", rd->alpha2[0], rd->alpha2[1]);
2853 static int reg_set_rd_core(const struct ieee80211_regdomain *rd)
2855 if (!is_world_regdom(rd->alpha2))
2857 update_world_regdomain(rd);
2861 static int reg_set_rd_user(const struct ieee80211_regdomain *rd,
2862 struct regulatory_request *user_request)
2864 const struct ieee80211_regdomain *intersected_rd = NULL;
2866 if (!regdom_changes(rd->alpha2))
2869 if (!is_valid_rd(rd)) {
2870 pr_err("Invalid regulatory domain detected: %c%c\n",
2871 rd->alpha2[0], rd->alpha2[1]);
2872 print_regdomain_info(rd);
2876 if (!user_request->intersect) {
2877 reset_regdomains(false, rd);
2881 intersected_rd = regdom_intersect(rd, get_cfg80211_regdom());
2882 if (!intersected_rd)
2887 reset_regdomains(false, intersected_rd);
2892 static int reg_set_rd_driver(const struct ieee80211_regdomain *rd,
2893 struct regulatory_request *driver_request)
2895 const struct ieee80211_regdomain *regd;
2896 const struct ieee80211_regdomain *intersected_rd = NULL;
2897 const struct ieee80211_regdomain *tmp;
2898 struct wiphy *request_wiphy;
2900 if (is_world_regdom(rd->alpha2))
2903 if (!regdom_changes(rd->alpha2))
2906 if (!is_valid_rd(rd)) {
2907 pr_err("Invalid regulatory domain detected: %c%c\n",
2908 rd->alpha2[0], rd->alpha2[1]);
2909 print_regdomain_info(rd);
2913 request_wiphy = wiphy_idx_to_wiphy(driver_request->wiphy_idx);
2917 if (!driver_request->intersect) {
2918 if (request_wiphy->regd)
2921 regd = reg_copy_regd(rd);
2923 return PTR_ERR(regd);
2925 rcu_assign_pointer(request_wiphy->regd, regd);
2926 reset_regdomains(false, rd);
2930 intersected_rd = regdom_intersect(rd, get_cfg80211_regdom());
2931 if (!intersected_rd)
2935 * We can trash what CRDA provided now.
2936 * However if a driver requested this specific regulatory
2937 * domain we keep it for its private use
2939 tmp = get_wiphy_regdom(request_wiphy);
2940 rcu_assign_pointer(request_wiphy->regd, rd);
2941 rcu_free_regdom(tmp);
2945 reset_regdomains(false, intersected_rd);
2950 static int reg_set_rd_country_ie(const struct ieee80211_regdomain *rd,
2951 struct regulatory_request *country_ie_request)
2953 struct wiphy *request_wiphy;
2955 if (!is_alpha2_set(rd->alpha2) && !is_an_alpha2(rd->alpha2) &&
2956 !is_unknown_alpha2(rd->alpha2))
2960 * Lets only bother proceeding on the same alpha2 if the current
2961 * rd is non static (it means CRDA was present and was used last)
2962 * and the pending request came in from a country IE
2965 if (!is_valid_rd(rd)) {
2966 pr_err("Invalid regulatory domain detected: %c%c\n",
2967 rd->alpha2[0], rd->alpha2[1]);
2968 print_regdomain_info(rd);
2972 request_wiphy = wiphy_idx_to_wiphy(country_ie_request->wiphy_idx);
2976 if (country_ie_request->intersect)
2979 reset_regdomains(false, rd);
2984 * Use this call to set the current regulatory domain. Conflicts with
2985 * multiple drivers can be ironed out later. Caller must've already
2986 * kmalloc'd the rd structure.
2988 int set_regdom(const struct ieee80211_regdomain *rd,
2989 enum ieee80211_regd_source regd_src)
2991 struct regulatory_request *lr;
2992 bool user_reset = false;
2995 if (!reg_is_valid_request(rd->alpha2)) {
3000 if (regd_src == REGD_SOURCE_CRDA)
3001 reset_crda_timeouts();
3003 lr = get_last_request();
3005 /* Note that this doesn't update the wiphys, this is done below */
3006 switch (lr->initiator) {
3007 case NL80211_REGDOM_SET_BY_CORE:
3008 r = reg_set_rd_core(rd);
3010 case NL80211_REGDOM_SET_BY_USER:
3011 r = reg_set_rd_user(rd, lr);
3014 case NL80211_REGDOM_SET_BY_DRIVER:
3015 r = reg_set_rd_driver(rd, lr);
3017 case NL80211_REGDOM_SET_BY_COUNTRY_IE:
3018 r = reg_set_rd_country_ie(rd, lr);
3021 WARN(1, "invalid initiator %d\n", lr->initiator);
3029 reg_set_request_processed();
3032 /* Back to world regulatory in case of errors */
3033 restore_regulatory_settings(user_reset);
3040 /* This would make this whole thing pointless */
3041 if (WARN_ON(!lr->intersect && rd != get_cfg80211_regdom()))
3044 /* update all wiphys now with the new established regulatory domain */
3045 update_all_wiphy_regulatory(lr->initiator);
3047 print_regdomain(get_cfg80211_regdom());
3049 nl80211_send_reg_change_event(lr);
3051 reg_set_request_processed();
3056 static int __regulatory_set_wiphy_regd(struct wiphy *wiphy,
3057 struct ieee80211_regdomain *rd)
3059 const struct ieee80211_regdomain *regd;
3060 const struct ieee80211_regdomain *prev_regd;
3061 struct cfg80211_registered_device *rdev;
3063 if (WARN_ON(!wiphy || !rd))
3066 if (WARN(!(wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED),
3067 "wiphy should have REGULATORY_WIPHY_SELF_MANAGED\n"))
3070 if (WARN(!is_valid_rd(rd), "Invalid regulatory domain detected\n")) {
3071 print_regdomain_info(rd);
3075 regd = reg_copy_regd(rd);
3077 return PTR_ERR(regd);
3079 rdev = wiphy_to_rdev(wiphy);
3081 spin_lock(®_requests_lock);
3082 prev_regd = rdev->requested_regd;
3083 rdev->requested_regd = regd;
3084 spin_unlock(®_requests_lock);
3090 int regulatory_set_wiphy_regd(struct wiphy *wiphy,
3091 struct ieee80211_regdomain *rd)
3093 int ret = __regulatory_set_wiphy_regd(wiphy, rd);
3098 schedule_work(®_work);
3101 EXPORT_SYMBOL(regulatory_set_wiphy_regd);
3103 int regulatory_set_wiphy_regd_sync_rtnl(struct wiphy *wiphy,
3104 struct ieee80211_regdomain *rd)
3110 ret = __regulatory_set_wiphy_regd(wiphy, rd);
3114 /* process the request immediately */
3115 reg_process_self_managed_hints();
3118 EXPORT_SYMBOL(regulatory_set_wiphy_regd_sync_rtnl);
3120 void wiphy_regulatory_register(struct wiphy *wiphy)
3122 struct regulatory_request *lr;
3124 /* self-managed devices ignore external hints */
3125 if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED)
3126 wiphy->regulatory_flags |= REGULATORY_DISABLE_BEACON_HINTS |
3127 REGULATORY_COUNTRY_IE_IGNORE;
3129 if (!reg_dev_ignore_cell_hint(wiphy))
3130 reg_num_devs_support_basehint++;
3132 lr = get_last_request();
3133 wiphy_update_regulatory(wiphy, lr->initiator);
3136 void wiphy_regulatory_deregister(struct wiphy *wiphy)
3138 struct wiphy *request_wiphy = NULL;
3139 struct regulatory_request *lr;
3141 lr = get_last_request();
3143 if (!reg_dev_ignore_cell_hint(wiphy))
3144 reg_num_devs_support_basehint--;
3146 rcu_free_regdom(get_wiphy_regdom(wiphy));
3147 RCU_INIT_POINTER(wiphy->regd, NULL);
3150 request_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx);
3152 if (!request_wiphy || request_wiphy != wiphy)
3155 lr->wiphy_idx = WIPHY_IDX_INVALID;
3156 lr->country_ie_env = ENVIRON_ANY;
3160 * See http://www.fcc.gov/document/5-ghz-unlicensed-spectrum-unii, for
3161 * UNII band definitions
3163 int cfg80211_get_unii(int freq)
3166 if (freq >= 5150 && freq <= 5250)
3170 if (freq > 5250 && freq <= 5350)
3174 if (freq > 5350 && freq <= 5470)
3178 if (freq > 5470 && freq <= 5725)
3182 if (freq > 5725 && freq <= 5825)
3188 bool regulatory_indoor_allowed(void)
3190 return reg_is_indoor;
3193 int __init regulatory_init(void)
3197 reg_pdev = platform_device_register_simple("regulatory", 0, NULL, 0);
3198 if (IS_ERR(reg_pdev))
3199 return PTR_ERR(reg_pdev);
3201 spin_lock_init(®_requests_lock);
3202 spin_lock_init(®_pending_beacons_lock);
3203 spin_lock_init(®_indoor_lock);
3205 reg_regdb_size_check();
3207 rcu_assign_pointer(cfg80211_regdomain, cfg80211_world_regdom);
3209 user_alpha2[0] = '9';
3210 user_alpha2[1] = '7';
3212 /* We always try to get an update for the static regdomain */
3213 err = regulatory_hint_core(cfg80211_world_regdom->alpha2);
3215 if (err == -ENOMEM) {
3216 platform_device_unregister(reg_pdev);
3220 * N.B. kobject_uevent_env() can fail mainly for when we're out
3221 * memory which is handled and propagated appropriately above
3222 * but it can also fail during a netlink_broadcast() or during
3223 * early boot for call_usermodehelper(). For now treat these
3224 * errors as non-fatal.
3226 pr_err("kobject_uevent_env() was unable to call CRDA during init\n");
3230 * Finally, if the user set the module parameter treat it
3233 if (!is_world_regdom(ieee80211_regdom))
3234 regulatory_hint_user(ieee80211_regdom,
3235 NL80211_USER_REG_HINT_USER);
3240 void regulatory_exit(void)
3242 struct regulatory_request *reg_request, *tmp;
3243 struct reg_beacon *reg_beacon, *btmp;
3245 cancel_work_sync(®_work);
3246 cancel_crda_timeout_sync();
3247 cancel_delayed_work_sync(®_check_chans);
3249 /* Lock to suppress warnings */
3251 reset_regdomains(true, NULL);
3254 dev_set_uevent_suppress(®_pdev->dev, true);
3256 platform_device_unregister(reg_pdev);
3258 list_for_each_entry_safe(reg_beacon, btmp, ®_pending_beacons, list) {
3259 list_del(®_beacon->list);
3263 list_for_each_entry_safe(reg_beacon, btmp, ®_beacon_list, list) {
3264 list_del(®_beacon->list);
3268 list_for_each_entry_safe(reg_request, tmp, ®_requests_list, list) {
3269 list_del(®_request->list);