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>
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.
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.
22 * DOC: Wireless regulatory infrastructure
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.
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.
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.
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.
45 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
47 #include <linux/kernel.h>
48 #include <linux/export.h>
49 #include <linux/slab.h>
50 #include <linux/list.h>
51 #include <linux/ctype.h>
52 #include <linux/nl80211.h>
53 #include <linux/platform_device.h>
54 #include <linux/moduleparam.h>
55 #include <net/cfg80211.h>
61 #ifdef CONFIG_CFG80211_REG_DEBUG
62 #define REG_DBG_PRINT(format, args...) \
63 printk(KERN_DEBUG pr_fmt(format), ##args)
65 #define REG_DBG_PRINT(args...)
68 enum reg_request_treatment {
75 static struct regulatory_request core_request_world = {
76 .initiator = NL80211_REGDOM_SET_BY_CORE,
81 .country_ie_env = ENVIRON_ANY,
85 * Receipt of information from last regulatory request,
86 * protected by RTNL (and can be accessed with RCU protection)
88 static struct regulatory_request __rcu *last_request =
89 (void __rcu *)&core_request_world;
91 /* To trigger userspace events */
92 static struct platform_device *reg_pdev;
94 static struct device_type reg_device_type = {
95 .uevent = reg_device_uevent,
99 * Central wireless core regulatory domains, we only need two,
100 * the current one and a world regulatory domain in case we have no
101 * information to give us an alpha2.
102 * (protected by RTNL, can be read under RCU)
104 const struct ieee80211_regdomain __rcu *cfg80211_regdomain;
107 * Number of devices that registered to the core
108 * that support cellular base station regulatory hints
109 * (protected by RTNL)
111 static int reg_num_devs_support_basehint;
113 static const struct ieee80211_regdomain *get_cfg80211_regdom(void)
115 return rtnl_dereference(cfg80211_regdomain);
118 static const struct ieee80211_regdomain *get_wiphy_regdom(struct wiphy *wiphy)
120 return rtnl_dereference(wiphy->regd);
123 static const char *reg_dfs_region_str(enum nl80211_dfs_regions dfs_region)
125 switch (dfs_region) {
126 case NL80211_DFS_UNSET:
128 case NL80211_DFS_FCC:
130 case NL80211_DFS_ETSI:
138 static void rcu_free_regdom(const struct ieee80211_regdomain *r)
142 kfree_rcu((struct ieee80211_regdomain *)r, rcu_head);
145 static struct regulatory_request *get_last_request(void)
147 return rcu_dereference_rtnl(last_request);
150 /* Used to queue up regulatory hints */
151 static LIST_HEAD(reg_requests_list);
152 static spinlock_t reg_requests_lock;
154 /* Used to queue up beacon hints for review */
155 static LIST_HEAD(reg_pending_beacons);
156 static spinlock_t reg_pending_beacons_lock;
158 /* Used to keep track of processed beacon hints */
159 static LIST_HEAD(reg_beacon_list);
162 struct list_head list;
163 struct ieee80211_channel chan;
166 static void reg_todo(struct work_struct *work);
167 static DECLARE_WORK(reg_work, reg_todo);
169 static void reg_timeout_work(struct work_struct *work);
170 static DECLARE_DELAYED_WORK(reg_timeout, reg_timeout_work);
172 /* We keep a static world regulatory domain in case of the absence of CRDA */
173 static const struct ieee80211_regdomain world_regdom = {
177 /* IEEE 802.11b/g, channels 1..11 */
178 REG_RULE(2412-10, 2462+10, 40, 6, 20, 0),
179 /* IEEE 802.11b/g, channels 12..13. */
180 REG_RULE(2467-10, 2472+10, 40, 6, 20,
182 /* IEEE 802.11 channel 14 - Only JP enables
183 * this and for 802.11b only */
184 REG_RULE(2484-10, 2484+10, 20, 6, 20,
186 NL80211_RRF_NO_OFDM),
187 /* IEEE 802.11a, channel 36..48 */
188 REG_RULE(5180-10, 5240+10, 160, 6, 20,
191 /* IEEE 802.11a, channel 52..64 - DFS required */
192 REG_RULE(5260-10, 5320+10, 160, 6, 20,
196 /* IEEE 802.11a, channel 100..144 - DFS required */
197 REG_RULE(5500-10, 5720+10, 160, 6, 20,
201 /* IEEE 802.11a, channel 149..165 */
202 REG_RULE(5745-10, 5825+10, 80, 6, 20,
205 /* IEEE 802.11ad (60gHz), channels 1..3 */
206 REG_RULE(56160+2160*1-1080, 56160+2160*3+1080, 2160, 0, 0, 0),
210 /* protected by RTNL */
211 static const struct ieee80211_regdomain *cfg80211_world_regdom =
214 static char *ieee80211_regdom = "00";
215 static char user_alpha2[2];
217 module_param(ieee80211_regdom, charp, 0444);
218 MODULE_PARM_DESC(ieee80211_regdom, "IEEE 802.11 regulatory domain code");
220 static void reg_kfree_last_request(void)
222 struct regulatory_request *lr;
224 lr = get_last_request();
226 if (lr != &core_request_world && lr)
227 kfree_rcu(lr, rcu_head);
230 static void reg_update_last_request(struct regulatory_request *request)
232 reg_kfree_last_request();
233 rcu_assign_pointer(last_request, request);
236 static void reset_regdomains(bool full_reset,
237 const struct ieee80211_regdomain *new_regdom)
239 const struct ieee80211_regdomain *r;
243 r = get_cfg80211_regdom();
245 /* avoid freeing static information or freeing something twice */
246 if (r == cfg80211_world_regdom)
248 if (cfg80211_world_regdom == &world_regdom)
249 cfg80211_world_regdom = NULL;
250 if (r == &world_regdom)
254 rcu_free_regdom(cfg80211_world_regdom);
256 cfg80211_world_regdom = &world_regdom;
257 rcu_assign_pointer(cfg80211_regdomain, new_regdom);
262 reg_update_last_request(&core_request_world);
266 * Dynamic world regulatory domain requested by the wireless
267 * core upon initialization
269 static void update_world_regdomain(const struct ieee80211_regdomain *rd)
271 struct regulatory_request *lr;
273 lr = get_last_request();
277 reset_regdomains(false, rd);
279 cfg80211_world_regdom = rd;
282 bool is_world_regdom(const char *alpha2)
286 return alpha2[0] == '0' && alpha2[1] == '0';
289 static bool is_alpha2_set(const char *alpha2)
293 return alpha2[0] && alpha2[1];
296 static bool is_unknown_alpha2(const char *alpha2)
301 * Special case where regulatory domain was built by driver
302 * but a specific alpha2 cannot be determined
304 return alpha2[0] == '9' && alpha2[1] == '9';
307 static bool is_intersected_alpha2(const char *alpha2)
312 * Special case where regulatory domain is the
313 * result of an intersection between two regulatory domain
316 return alpha2[0] == '9' && alpha2[1] == '8';
319 static bool is_an_alpha2(const char *alpha2)
323 return isalpha(alpha2[0]) && isalpha(alpha2[1]);
326 static bool alpha2_equal(const char *alpha2_x, const char *alpha2_y)
328 if (!alpha2_x || !alpha2_y)
330 return alpha2_x[0] == alpha2_y[0] && alpha2_x[1] == alpha2_y[1];
333 static bool regdom_changes(const char *alpha2)
335 const struct ieee80211_regdomain *r = get_cfg80211_regdom();
339 return !alpha2_equal(r->alpha2, alpha2);
343 * The NL80211_REGDOM_SET_BY_USER regdom alpha2 is cached, this lets
344 * you know if a valid regulatory hint with NL80211_REGDOM_SET_BY_USER
345 * has ever been issued.
347 static bool is_user_regdom_saved(void)
349 if (user_alpha2[0] == '9' && user_alpha2[1] == '7')
352 /* This would indicate a mistake on the design */
353 if (WARN(!is_world_regdom(user_alpha2) && !is_an_alpha2(user_alpha2),
354 "Unexpected user alpha2: %c%c\n",
355 user_alpha2[0], user_alpha2[1]))
361 static const struct ieee80211_regdomain *
362 reg_copy_regd(const struct ieee80211_regdomain *src_regd)
364 struct ieee80211_regdomain *regd;
369 sizeof(struct ieee80211_regdomain) +
370 src_regd->n_reg_rules * sizeof(struct ieee80211_reg_rule);
372 regd = kzalloc(size_of_regd, GFP_KERNEL);
374 return ERR_PTR(-ENOMEM);
376 memcpy(regd, src_regd, sizeof(struct ieee80211_regdomain));
378 for (i = 0; i < src_regd->n_reg_rules; i++)
379 memcpy(®d->reg_rules[i], &src_regd->reg_rules[i],
380 sizeof(struct ieee80211_reg_rule));
385 #ifdef CONFIG_CFG80211_INTERNAL_REGDB
386 struct reg_regdb_search_request {
388 struct list_head list;
391 static LIST_HEAD(reg_regdb_search_list);
392 static DEFINE_MUTEX(reg_regdb_search_mutex);
394 static void reg_regdb_search(struct work_struct *work)
396 struct reg_regdb_search_request *request;
397 const struct ieee80211_regdomain *curdom, *regdom = NULL;
402 mutex_lock(®_regdb_search_mutex);
403 while (!list_empty(®_regdb_search_list)) {
404 request = list_first_entry(®_regdb_search_list,
405 struct reg_regdb_search_request,
407 list_del(&request->list);
409 for (i = 0; i < reg_regdb_size; i++) {
410 curdom = reg_regdb[i];
412 if (alpha2_equal(request->alpha2, curdom->alpha2)) {
413 regdom = reg_copy_regd(curdom);
420 mutex_unlock(®_regdb_search_mutex);
422 if (!IS_ERR_OR_NULL(regdom))
428 static DECLARE_WORK(reg_regdb_work, reg_regdb_search);
430 static void reg_regdb_query(const char *alpha2)
432 struct reg_regdb_search_request *request;
437 request = kzalloc(sizeof(struct reg_regdb_search_request), GFP_KERNEL);
441 memcpy(request->alpha2, alpha2, 2);
443 mutex_lock(®_regdb_search_mutex);
444 list_add_tail(&request->list, ®_regdb_search_list);
445 mutex_unlock(®_regdb_search_mutex);
447 schedule_work(®_regdb_work);
450 /* Feel free to add any other sanity checks here */
451 static void reg_regdb_size_check(void)
453 /* We should ideally BUILD_BUG_ON() but then random builds would fail */
454 WARN_ONCE(!reg_regdb_size, "db.txt is empty, you should update it...");
457 static inline void reg_regdb_size_check(void) {}
458 static inline void reg_regdb_query(const char *alpha2) {}
459 #endif /* CONFIG_CFG80211_INTERNAL_REGDB */
462 * This lets us keep regulatory code which is updated on a regulatory
463 * basis in userspace. Country information is filled in by
466 static int call_crda(const char *alpha2)
468 if (!is_world_regdom((char *) alpha2))
469 pr_info("Calling CRDA for country: %c%c\n",
470 alpha2[0], alpha2[1]);
472 pr_info("Calling CRDA to update world regulatory domain\n");
474 /* query internal regulatory database (if it exists) */
475 reg_regdb_query(alpha2);
477 return kobject_uevent(®_pdev->dev.kobj, KOBJ_CHANGE);
480 static enum reg_request_treatment
481 reg_call_crda(struct regulatory_request *request)
483 if (call_crda(request->alpha2))
484 return REG_REQ_IGNORE;
488 bool reg_is_valid_request(const char *alpha2)
490 struct regulatory_request *lr = get_last_request();
492 if (!lr || lr->processed)
495 return alpha2_equal(lr->alpha2, alpha2);
498 /* Sanity check on a regulatory rule */
499 static bool is_valid_reg_rule(const struct ieee80211_reg_rule *rule)
501 const struct ieee80211_freq_range *freq_range = &rule->freq_range;
504 if (freq_range->start_freq_khz <= 0 || freq_range->end_freq_khz <= 0)
507 if (freq_range->start_freq_khz > freq_range->end_freq_khz)
510 freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz;
512 if (freq_range->end_freq_khz <= freq_range->start_freq_khz ||
513 freq_range->max_bandwidth_khz > freq_diff)
519 static bool is_valid_rd(const struct ieee80211_regdomain *rd)
521 const struct ieee80211_reg_rule *reg_rule = NULL;
524 if (!rd->n_reg_rules)
527 if (WARN_ON(rd->n_reg_rules > NL80211_MAX_SUPP_REG_RULES))
530 for (i = 0; i < rd->n_reg_rules; i++) {
531 reg_rule = &rd->reg_rules[i];
532 if (!is_valid_reg_rule(reg_rule))
539 static bool reg_does_bw_fit(const struct ieee80211_freq_range *freq_range,
540 u32 center_freq_khz, u32 bw_khz)
542 u32 start_freq_khz, end_freq_khz;
544 start_freq_khz = center_freq_khz - (bw_khz/2);
545 end_freq_khz = center_freq_khz + (bw_khz/2);
547 if (start_freq_khz >= freq_range->start_freq_khz &&
548 end_freq_khz <= freq_range->end_freq_khz)
555 * freq_in_rule_band - tells us if a frequency is in a frequency band
556 * @freq_range: frequency rule we want to query
557 * @freq_khz: frequency we are inquiring about
559 * This lets us know if a specific frequency rule is or is not relevant to
560 * a specific frequency's band. Bands are device specific and artificial
561 * definitions (the "2.4 GHz band", the "5 GHz band" and the "60GHz band"),
562 * however it is safe for now to assume that a frequency rule should not be
563 * part of a frequency's band if the start freq or end freq are off by more
564 * than 2 GHz for the 2.4 and 5 GHz bands, and by more than 10 GHz for the
566 * This resolution can be lowered and should be considered as we add
567 * regulatory rule support for other "bands".
569 static bool freq_in_rule_band(const struct ieee80211_freq_range *freq_range,
572 #define ONE_GHZ_IN_KHZ 1000000
574 * From 802.11ad: directional multi-gigabit (DMG):
575 * Pertaining to operation in a frequency band containing a channel
576 * with the Channel starting frequency above 45 GHz.
578 u32 limit = freq_khz > 45 * ONE_GHZ_IN_KHZ ?
579 10 * ONE_GHZ_IN_KHZ : 2 * ONE_GHZ_IN_KHZ;
580 if (abs(freq_khz - freq_range->start_freq_khz) <= limit)
582 if (abs(freq_khz - freq_range->end_freq_khz) <= limit)
585 #undef ONE_GHZ_IN_KHZ
589 * Later on we can perhaps use the more restrictive DFS
590 * region but we don't have information for that yet so
591 * for now simply disallow conflicts.
593 static enum nl80211_dfs_regions
594 reg_intersect_dfs_region(const enum nl80211_dfs_regions dfs_region1,
595 const enum nl80211_dfs_regions dfs_region2)
597 if (dfs_region1 != dfs_region2)
598 return NL80211_DFS_UNSET;
603 * Helper for regdom_intersect(), this does the real
604 * mathematical intersection fun
606 static int reg_rules_intersect(const struct ieee80211_reg_rule *rule1,
607 const struct ieee80211_reg_rule *rule2,
608 struct ieee80211_reg_rule *intersected_rule)
610 const struct ieee80211_freq_range *freq_range1, *freq_range2;
611 struct ieee80211_freq_range *freq_range;
612 const struct ieee80211_power_rule *power_rule1, *power_rule2;
613 struct ieee80211_power_rule *power_rule;
616 freq_range1 = &rule1->freq_range;
617 freq_range2 = &rule2->freq_range;
618 freq_range = &intersected_rule->freq_range;
620 power_rule1 = &rule1->power_rule;
621 power_rule2 = &rule2->power_rule;
622 power_rule = &intersected_rule->power_rule;
624 freq_range->start_freq_khz = max(freq_range1->start_freq_khz,
625 freq_range2->start_freq_khz);
626 freq_range->end_freq_khz = min(freq_range1->end_freq_khz,
627 freq_range2->end_freq_khz);
628 freq_range->max_bandwidth_khz = min(freq_range1->max_bandwidth_khz,
629 freq_range2->max_bandwidth_khz);
631 freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz;
632 if (freq_range->max_bandwidth_khz > freq_diff)
633 freq_range->max_bandwidth_khz = freq_diff;
635 power_rule->max_eirp = min(power_rule1->max_eirp,
636 power_rule2->max_eirp);
637 power_rule->max_antenna_gain = min(power_rule1->max_antenna_gain,
638 power_rule2->max_antenna_gain);
640 intersected_rule->flags = rule1->flags | rule2->flags;
642 if (!is_valid_reg_rule(intersected_rule))
649 * regdom_intersect - do the intersection between two regulatory domains
650 * @rd1: first regulatory domain
651 * @rd2: second regulatory domain
653 * Use this function to get the intersection between two regulatory domains.
654 * Once completed we will mark the alpha2 for the rd as intersected, "98",
655 * as no one single alpha2 can represent this regulatory domain.
657 * Returns a pointer to the regulatory domain structure which will hold the
658 * resulting intersection of rules between rd1 and rd2. We will
659 * kzalloc() this structure for you.
661 static struct ieee80211_regdomain *
662 regdom_intersect(const struct ieee80211_regdomain *rd1,
663 const struct ieee80211_regdomain *rd2)
667 unsigned int num_rules = 0, rule_idx = 0;
668 const struct ieee80211_reg_rule *rule1, *rule2;
669 struct ieee80211_reg_rule *intersected_rule;
670 struct ieee80211_regdomain *rd;
671 /* This is just a dummy holder to help us count */
672 struct ieee80211_reg_rule dummy_rule;
678 * First we get a count of the rules we'll need, then we actually
679 * build them. This is to so we can malloc() and free() a
680 * regdomain once. The reason we use reg_rules_intersect() here
681 * is it will return -EINVAL if the rule computed makes no sense.
682 * All rules that do check out OK are valid.
685 for (x = 0; x < rd1->n_reg_rules; x++) {
686 rule1 = &rd1->reg_rules[x];
687 for (y = 0; y < rd2->n_reg_rules; y++) {
688 rule2 = &rd2->reg_rules[y];
689 if (!reg_rules_intersect(rule1, rule2, &dummy_rule))
697 size_of_regd = sizeof(struct ieee80211_regdomain) +
698 num_rules * sizeof(struct ieee80211_reg_rule);
700 rd = kzalloc(size_of_regd, GFP_KERNEL);
704 for (x = 0; x < rd1->n_reg_rules && rule_idx < num_rules; x++) {
705 rule1 = &rd1->reg_rules[x];
706 for (y = 0; y < rd2->n_reg_rules && rule_idx < num_rules; y++) {
707 rule2 = &rd2->reg_rules[y];
709 * This time around instead of using the stack lets
710 * write to the target rule directly saving ourselves
713 intersected_rule = &rd->reg_rules[rule_idx];
714 r = reg_rules_intersect(rule1, rule2, intersected_rule);
716 * No need to memset here the intersected rule here as
717 * we're not using the stack anymore
725 if (rule_idx != num_rules) {
730 rd->n_reg_rules = num_rules;
733 rd->dfs_region = reg_intersect_dfs_region(rd1->dfs_region,
740 * XXX: add support for the rest of enum nl80211_reg_rule_flags, we may
741 * want to just have the channel structure use these
743 static u32 map_regdom_flags(u32 rd_flags)
745 u32 channel_flags = 0;
746 if (rd_flags & NL80211_RRF_NO_IR_ALL)
747 channel_flags |= IEEE80211_CHAN_NO_IR;
748 if (rd_flags & NL80211_RRF_DFS)
749 channel_flags |= IEEE80211_CHAN_RADAR;
750 if (rd_flags & NL80211_RRF_NO_OFDM)
751 channel_flags |= IEEE80211_CHAN_NO_OFDM;
752 return channel_flags;
755 static const struct ieee80211_reg_rule *
756 freq_reg_info_regd(struct wiphy *wiphy, u32 center_freq,
757 const struct ieee80211_regdomain *regd)
760 bool band_rule_found = false;
761 bool bw_fits = false;
764 return ERR_PTR(-EINVAL);
766 for (i = 0; i < regd->n_reg_rules; i++) {
767 const struct ieee80211_reg_rule *rr;
768 const struct ieee80211_freq_range *fr = NULL;
770 rr = ®d->reg_rules[i];
771 fr = &rr->freq_range;
774 * We only need to know if one frequency rule was
775 * was in center_freq's band, that's enough, so lets
776 * not overwrite it once found
778 if (!band_rule_found)
779 band_rule_found = freq_in_rule_band(fr, center_freq);
781 bw_fits = reg_does_bw_fit(fr, center_freq, MHZ_TO_KHZ(20));
783 if (band_rule_found && bw_fits)
787 if (!band_rule_found)
788 return ERR_PTR(-ERANGE);
790 return ERR_PTR(-EINVAL);
793 const struct ieee80211_reg_rule *freq_reg_info(struct wiphy *wiphy,
796 const struct ieee80211_regdomain *regd;
797 struct regulatory_request *lr = get_last_request();
800 * Follow the driver's regulatory domain, if present, unless a country
801 * IE has been processed or a user wants to help complaince further
803 if (lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE &&
804 lr->initiator != NL80211_REGDOM_SET_BY_USER &&
806 regd = get_wiphy_regdom(wiphy);
808 regd = get_cfg80211_regdom();
810 return freq_reg_info_regd(wiphy, center_freq, regd);
812 EXPORT_SYMBOL(freq_reg_info);
814 const char *reg_initiator_name(enum nl80211_reg_initiator initiator)
817 case NL80211_REGDOM_SET_BY_CORE:
819 case NL80211_REGDOM_SET_BY_USER:
821 case NL80211_REGDOM_SET_BY_DRIVER:
823 case NL80211_REGDOM_SET_BY_COUNTRY_IE:
830 EXPORT_SYMBOL(reg_initiator_name);
832 #ifdef CONFIG_CFG80211_REG_DEBUG
833 static void chan_reg_rule_print_dbg(struct ieee80211_channel *chan,
834 const struct ieee80211_reg_rule *reg_rule)
836 const struct ieee80211_power_rule *power_rule;
837 const struct ieee80211_freq_range *freq_range;
838 char max_antenna_gain[32];
840 power_rule = ®_rule->power_rule;
841 freq_range = ®_rule->freq_range;
843 if (!power_rule->max_antenna_gain)
844 snprintf(max_antenna_gain, 32, "N/A");
846 snprintf(max_antenna_gain, 32, "%d", power_rule->max_antenna_gain);
848 REG_DBG_PRINT("Updating information on frequency %d MHz with regulatory rule:\n",
851 REG_DBG_PRINT("%d KHz - %d KHz @ %d KHz), (%s mBi, %d mBm)\n",
852 freq_range->start_freq_khz, freq_range->end_freq_khz,
853 freq_range->max_bandwidth_khz, max_antenna_gain,
854 power_rule->max_eirp);
857 static void chan_reg_rule_print_dbg(struct ieee80211_channel *chan,
858 const struct ieee80211_reg_rule *reg_rule)
865 * Note that right now we assume the desired channel bandwidth
866 * is always 20 MHz for each individual channel (HT40 uses 20 MHz
867 * per channel, the primary and the extension channel).
869 static void handle_channel(struct wiphy *wiphy,
870 enum nl80211_reg_initiator initiator,
871 struct ieee80211_channel *chan)
873 u32 flags, bw_flags = 0;
874 const struct ieee80211_reg_rule *reg_rule = NULL;
875 const struct ieee80211_power_rule *power_rule = NULL;
876 const struct ieee80211_freq_range *freq_range = NULL;
877 struct wiphy *request_wiphy = NULL;
878 struct regulatory_request *lr = get_last_request();
880 request_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx);
882 flags = chan->orig_flags;
884 reg_rule = freq_reg_info(wiphy, MHZ_TO_KHZ(chan->center_freq));
885 if (IS_ERR(reg_rule)) {
887 * We will disable all channels that do not match our
888 * received regulatory rule unless the hint is coming
889 * from a Country IE and the Country IE had no information
890 * about a band. The IEEE 802.11 spec allows for an AP
891 * to send only a subset of the regulatory rules allowed,
892 * so an AP in the US that only supports 2.4 GHz may only send
893 * a country IE with information for the 2.4 GHz band
894 * while 5 GHz is still supported.
896 if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE &&
897 PTR_ERR(reg_rule) == -ERANGE)
900 if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER &&
901 request_wiphy && request_wiphy == wiphy &&
902 request_wiphy->regulatory_flags & REGULATORY_STRICT_REG) {
903 REG_DBG_PRINT("Disabling freq %d MHz for good\n",
905 chan->orig_flags |= IEEE80211_CHAN_DISABLED;
906 chan->flags = chan->orig_flags;
908 REG_DBG_PRINT("Disabling freq %d MHz\n",
910 chan->flags |= IEEE80211_CHAN_DISABLED;
915 chan_reg_rule_print_dbg(chan, reg_rule);
917 power_rule = ®_rule->power_rule;
918 freq_range = ®_rule->freq_range;
920 if (freq_range->max_bandwidth_khz < MHZ_TO_KHZ(40))
921 bw_flags = IEEE80211_CHAN_NO_HT40;
922 if (freq_range->max_bandwidth_khz < MHZ_TO_KHZ(80))
923 bw_flags |= IEEE80211_CHAN_NO_80MHZ;
924 if (freq_range->max_bandwidth_khz < MHZ_TO_KHZ(160))
925 bw_flags |= IEEE80211_CHAN_NO_160MHZ;
927 if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER &&
928 request_wiphy && request_wiphy == wiphy &&
929 request_wiphy->regulatory_flags & REGULATORY_STRICT_REG) {
931 * This guarantees the driver's requested regulatory domain
932 * will always be used as a base for further regulatory
935 chan->flags = chan->orig_flags =
936 map_regdom_flags(reg_rule->flags) | bw_flags;
937 chan->max_antenna_gain = chan->orig_mag =
938 (int) MBI_TO_DBI(power_rule->max_antenna_gain);
939 chan->max_reg_power = chan->max_power = chan->orig_mpwr =
940 (int) MBM_TO_DBM(power_rule->max_eirp);
944 chan->dfs_state = NL80211_DFS_USABLE;
945 chan->dfs_state_entered = jiffies;
947 chan->beacon_found = false;
948 chan->flags = flags | bw_flags | map_regdom_flags(reg_rule->flags);
949 chan->max_antenna_gain =
950 min_t(int, chan->orig_mag,
951 MBI_TO_DBI(power_rule->max_antenna_gain));
952 chan->max_reg_power = (int) MBM_TO_DBM(power_rule->max_eirp);
953 if (chan->orig_mpwr) {
955 * Devices that use REGULATORY_COUNTRY_IE_FOLLOW_POWER
956 * will always follow the passed country IE power settings.
958 if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE &&
959 wiphy->regulatory_flags & REGULATORY_COUNTRY_IE_FOLLOW_POWER)
960 chan->max_power = chan->max_reg_power;
962 chan->max_power = min(chan->orig_mpwr,
963 chan->max_reg_power);
965 chan->max_power = chan->max_reg_power;
968 static void handle_band(struct wiphy *wiphy,
969 enum nl80211_reg_initiator initiator,
970 struct ieee80211_supported_band *sband)
977 for (i = 0; i < sband->n_channels; i++)
978 handle_channel(wiphy, initiator, &sband->channels[i]);
981 static bool reg_request_cell_base(struct regulatory_request *request)
983 if (request->initiator != NL80211_REGDOM_SET_BY_USER)
985 return request->user_reg_hint_type == NL80211_USER_REG_HINT_CELL_BASE;
988 bool reg_last_request_cell_base(void)
990 return reg_request_cell_base(get_last_request());
993 #ifdef CONFIG_CFG80211_CERTIFICATION_ONUS
994 /* Core specific check */
995 static enum reg_request_treatment
996 reg_ignore_cell_hint(struct regulatory_request *pending_request)
998 struct regulatory_request *lr = get_last_request();
1000 if (!reg_num_devs_support_basehint)
1001 return REG_REQ_IGNORE;
1003 if (reg_request_cell_base(lr) &&
1004 !regdom_changes(pending_request->alpha2))
1005 return REG_REQ_ALREADY_SET;
1010 /* Device specific check */
1011 static bool reg_dev_ignore_cell_hint(struct wiphy *wiphy)
1013 return !(wiphy->features & NL80211_FEATURE_CELL_BASE_REG_HINTS);
1016 static int reg_ignore_cell_hint(struct regulatory_request *pending_request)
1018 return REG_REQ_IGNORE;
1021 static bool reg_dev_ignore_cell_hint(struct wiphy *wiphy)
1027 static bool wiphy_strict_alpha2_regd(struct wiphy *wiphy)
1029 if (wiphy->regulatory_flags & REGULATORY_STRICT_REG &&
1030 !(wiphy->regulatory_flags & REGULATORY_CUSTOM_REG))
1035 static bool ignore_reg_update(struct wiphy *wiphy,
1036 enum nl80211_reg_initiator initiator)
1038 struct regulatory_request *lr = get_last_request();
1041 REG_DBG_PRINT("Ignoring regulatory request set by %s "
1042 "since last_request is not set\n",
1043 reg_initiator_name(initiator));
1047 if (initiator == NL80211_REGDOM_SET_BY_CORE &&
1048 wiphy->regulatory_flags & REGULATORY_CUSTOM_REG) {
1049 REG_DBG_PRINT("Ignoring regulatory request set by %s "
1050 "since the driver uses its own custom "
1051 "regulatory domain\n",
1052 reg_initiator_name(initiator));
1057 * wiphy->regd will be set once the device has its own
1058 * desired regulatory domain set
1060 if (wiphy_strict_alpha2_regd(wiphy) && !wiphy->regd &&
1061 initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE &&
1062 !is_world_regdom(lr->alpha2)) {
1063 REG_DBG_PRINT("Ignoring regulatory request set by %s "
1064 "since the driver requires its own regulatory "
1065 "domain to be set first\n",
1066 reg_initiator_name(initiator));
1070 if (reg_request_cell_base(lr))
1071 return reg_dev_ignore_cell_hint(wiphy);
1076 static bool reg_is_world_roaming(struct wiphy *wiphy)
1078 const struct ieee80211_regdomain *cr = get_cfg80211_regdom();
1079 const struct ieee80211_regdomain *wr = get_wiphy_regdom(wiphy);
1080 struct regulatory_request *lr = get_last_request();
1082 if (is_world_regdom(cr->alpha2) || (wr && is_world_regdom(wr->alpha2)))
1085 if (lr && lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE &&
1086 wiphy->regulatory_flags & REGULATORY_CUSTOM_REG)
1092 static void handle_reg_beacon(struct wiphy *wiphy, unsigned int chan_idx,
1093 struct reg_beacon *reg_beacon)
1095 struct ieee80211_supported_band *sband;
1096 struct ieee80211_channel *chan;
1097 bool channel_changed = false;
1098 struct ieee80211_channel chan_before;
1100 sband = wiphy->bands[reg_beacon->chan.band];
1101 chan = &sband->channels[chan_idx];
1103 if (likely(chan->center_freq != reg_beacon->chan.center_freq))
1106 if (chan->beacon_found)
1109 chan->beacon_found = true;
1111 if (!reg_is_world_roaming(wiphy))
1114 if (wiphy->regulatory_flags & REGULATORY_DISABLE_BEACON_HINTS)
1117 chan_before.center_freq = chan->center_freq;
1118 chan_before.flags = chan->flags;
1120 if (chan->flags & IEEE80211_CHAN_NO_IR) {
1121 chan->flags &= ~IEEE80211_CHAN_NO_IR;
1122 channel_changed = true;
1125 if (channel_changed)
1126 nl80211_send_beacon_hint_event(wiphy, &chan_before, chan);
1130 * Called when a scan on a wiphy finds a beacon on
1133 static void wiphy_update_new_beacon(struct wiphy *wiphy,
1134 struct reg_beacon *reg_beacon)
1137 struct ieee80211_supported_band *sband;
1139 if (!wiphy->bands[reg_beacon->chan.band])
1142 sband = wiphy->bands[reg_beacon->chan.band];
1144 for (i = 0; i < sband->n_channels; i++)
1145 handle_reg_beacon(wiphy, i, reg_beacon);
1149 * Called upon reg changes or a new wiphy is added
1151 static void wiphy_update_beacon_reg(struct wiphy *wiphy)
1154 struct ieee80211_supported_band *sband;
1155 struct reg_beacon *reg_beacon;
1157 list_for_each_entry(reg_beacon, ®_beacon_list, list) {
1158 if (!wiphy->bands[reg_beacon->chan.band])
1160 sband = wiphy->bands[reg_beacon->chan.band];
1161 for (i = 0; i < sband->n_channels; i++)
1162 handle_reg_beacon(wiphy, i, reg_beacon);
1166 /* Reap the advantages of previously found beacons */
1167 static void reg_process_beacons(struct wiphy *wiphy)
1170 * Means we are just firing up cfg80211, so no beacons would
1171 * have been processed yet.
1175 wiphy_update_beacon_reg(wiphy);
1178 static bool is_ht40_allowed(struct ieee80211_channel *chan)
1182 if (chan->flags & IEEE80211_CHAN_DISABLED)
1184 /* This would happen when regulatory rules disallow HT40 completely */
1185 if ((chan->flags & IEEE80211_CHAN_NO_HT40) == IEEE80211_CHAN_NO_HT40)
1190 static void reg_process_ht_flags_channel(struct wiphy *wiphy,
1191 struct ieee80211_channel *channel)
1193 struct ieee80211_supported_band *sband = wiphy->bands[channel->band];
1194 struct ieee80211_channel *channel_before = NULL, *channel_after = NULL;
1197 if (!is_ht40_allowed(channel)) {
1198 channel->flags |= IEEE80211_CHAN_NO_HT40;
1203 * We need to ensure the extension channels exist to
1204 * be able to use HT40- or HT40+, this finds them (or not)
1206 for (i = 0; i < sband->n_channels; i++) {
1207 struct ieee80211_channel *c = &sband->channels[i];
1209 if (c->center_freq == (channel->center_freq - 20))
1211 if (c->center_freq == (channel->center_freq + 20))
1216 * Please note that this assumes target bandwidth is 20 MHz,
1217 * if that ever changes we also need to change the below logic
1218 * to include that as well.
1220 if (!is_ht40_allowed(channel_before))
1221 channel->flags |= IEEE80211_CHAN_NO_HT40MINUS;
1223 channel->flags &= ~IEEE80211_CHAN_NO_HT40MINUS;
1225 if (!is_ht40_allowed(channel_after))
1226 channel->flags |= IEEE80211_CHAN_NO_HT40PLUS;
1228 channel->flags &= ~IEEE80211_CHAN_NO_HT40PLUS;
1231 static void reg_process_ht_flags_band(struct wiphy *wiphy,
1232 struct ieee80211_supported_band *sband)
1239 for (i = 0; i < sband->n_channels; i++)
1240 reg_process_ht_flags_channel(wiphy, &sband->channels[i]);
1243 static void reg_process_ht_flags(struct wiphy *wiphy)
1245 enum ieee80211_band band;
1250 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
1251 reg_process_ht_flags_band(wiphy, wiphy->bands[band]);
1254 static void reg_call_notifier(struct wiphy *wiphy,
1255 struct regulatory_request *request)
1257 if (wiphy->reg_notifier)
1258 wiphy->reg_notifier(wiphy, request);
1261 static void wiphy_update_regulatory(struct wiphy *wiphy,
1262 enum nl80211_reg_initiator initiator)
1264 enum ieee80211_band band;
1265 struct regulatory_request *lr = get_last_request();
1267 if (ignore_reg_update(wiphy, initiator)) {
1269 * Regulatory updates set by CORE are ignored for custom
1270 * regulatory cards. Let us notify the changes to the driver,
1271 * as some drivers used this to restore its orig_* reg domain.
1273 if (initiator == NL80211_REGDOM_SET_BY_CORE &&
1274 wiphy->regulatory_flags & REGULATORY_CUSTOM_REG)
1275 reg_call_notifier(wiphy, lr);
1279 lr->dfs_region = get_cfg80211_regdom()->dfs_region;
1281 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
1282 handle_band(wiphy, initiator, wiphy->bands[band]);
1284 reg_process_beacons(wiphy);
1285 reg_process_ht_flags(wiphy);
1286 reg_call_notifier(wiphy, lr);
1289 static void update_all_wiphy_regulatory(enum nl80211_reg_initiator initiator)
1291 struct cfg80211_registered_device *rdev;
1292 struct wiphy *wiphy;
1296 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
1297 wiphy = &rdev->wiphy;
1298 wiphy_update_regulatory(wiphy, initiator);
1302 static void handle_channel_custom(struct wiphy *wiphy,
1303 struct ieee80211_channel *chan,
1304 const struct ieee80211_regdomain *regd)
1307 const struct ieee80211_reg_rule *reg_rule = NULL;
1308 const struct ieee80211_power_rule *power_rule = NULL;
1309 const struct ieee80211_freq_range *freq_range = NULL;
1311 reg_rule = freq_reg_info_regd(wiphy, MHZ_TO_KHZ(chan->center_freq),
1314 if (IS_ERR(reg_rule)) {
1315 REG_DBG_PRINT("Disabling freq %d MHz as custom regd has no rule that fits it\n",
1317 chan->orig_flags |= IEEE80211_CHAN_DISABLED;
1318 chan->flags = chan->orig_flags;
1322 chan_reg_rule_print_dbg(chan, reg_rule);
1324 power_rule = ®_rule->power_rule;
1325 freq_range = ®_rule->freq_range;
1327 if (freq_range->max_bandwidth_khz < MHZ_TO_KHZ(40))
1328 bw_flags = IEEE80211_CHAN_NO_HT40;
1329 if (freq_range->max_bandwidth_khz < MHZ_TO_KHZ(80))
1330 bw_flags |= IEEE80211_CHAN_NO_80MHZ;
1331 if (freq_range->max_bandwidth_khz < MHZ_TO_KHZ(160))
1332 bw_flags |= IEEE80211_CHAN_NO_160MHZ;
1334 chan->flags |= map_regdom_flags(reg_rule->flags) | bw_flags;
1335 chan->max_antenna_gain = (int) MBI_TO_DBI(power_rule->max_antenna_gain);
1336 chan->max_reg_power = chan->max_power =
1337 (int) MBM_TO_DBM(power_rule->max_eirp);
1340 static void handle_band_custom(struct wiphy *wiphy,
1341 struct ieee80211_supported_band *sband,
1342 const struct ieee80211_regdomain *regd)
1349 for (i = 0; i < sband->n_channels; i++)
1350 handle_channel_custom(wiphy, &sband->channels[i], regd);
1353 /* Used by drivers prior to wiphy registration */
1354 void wiphy_apply_custom_regulatory(struct wiphy *wiphy,
1355 const struct ieee80211_regdomain *regd)
1357 enum ieee80211_band band;
1358 unsigned int bands_set = 0;
1360 WARN(!(wiphy->regulatory_flags & REGULATORY_CUSTOM_REG),
1361 "wiphy should have REGULATORY_CUSTOM_REG\n");
1362 wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG;
1364 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
1365 if (!wiphy->bands[band])
1367 handle_band_custom(wiphy, wiphy->bands[band], regd);
1372 * no point in calling this if it won't have any effect
1373 * on your device's supported bands.
1375 WARN_ON(!bands_set);
1377 EXPORT_SYMBOL(wiphy_apply_custom_regulatory);
1379 static void reg_set_request_processed(void)
1381 bool need_more_processing = false;
1382 struct regulatory_request *lr = get_last_request();
1384 lr->processed = true;
1386 spin_lock(®_requests_lock);
1387 if (!list_empty(®_requests_list))
1388 need_more_processing = true;
1389 spin_unlock(®_requests_lock);
1391 if (lr->initiator == NL80211_REGDOM_SET_BY_USER)
1392 cancel_delayed_work(®_timeout);
1394 if (need_more_processing)
1395 schedule_work(®_work);
1399 * reg_process_hint_core - process core regulatory requests
1400 * @pending_request: a pending core regulatory request
1402 * The wireless subsystem can use this function to process
1403 * a regulatory request issued by the regulatory core.
1405 * Returns one of the different reg request treatment values.
1407 static enum reg_request_treatment
1408 reg_process_hint_core(struct regulatory_request *core_request)
1411 core_request->intersect = false;
1412 core_request->processed = false;
1414 reg_update_last_request(core_request);
1416 return reg_call_crda(core_request);
1419 static enum reg_request_treatment
1420 __reg_process_hint_user(struct regulatory_request *user_request)
1422 struct regulatory_request *lr = get_last_request();
1424 if (reg_request_cell_base(user_request))
1425 return reg_ignore_cell_hint(user_request);
1427 if (reg_request_cell_base(lr))
1428 return REG_REQ_IGNORE;
1430 if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE)
1431 return REG_REQ_INTERSECT;
1433 * If the user knows better the user should set the regdom
1434 * to their country before the IE is picked up
1436 if (lr->initiator == NL80211_REGDOM_SET_BY_USER &&
1438 return REG_REQ_IGNORE;
1440 * Process user requests only after previous user/driver/core
1441 * requests have been processed
1443 if ((lr->initiator == NL80211_REGDOM_SET_BY_CORE ||
1444 lr->initiator == NL80211_REGDOM_SET_BY_DRIVER ||
1445 lr->initiator == NL80211_REGDOM_SET_BY_USER) &&
1446 regdom_changes(lr->alpha2))
1447 return REG_REQ_IGNORE;
1449 if (!regdom_changes(user_request->alpha2))
1450 return REG_REQ_ALREADY_SET;
1456 * reg_process_hint_user - process user regulatory requests
1457 * @user_request: a pending user regulatory request
1459 * The wireless subsystem can use this function to process
1460 * a regulatory request initiated by userspace.
1462 * Returns one of the different reg request treatment values.
1464 static enum reg_request_treatment
1465 reg_process_hint_user(struct regulatory_request *user_request)
1467 enum reg_request_treatment treatment;
1469 treatment = __reg_process_hint_user(user_request);
1470 if (treatment == REG_REQ_IGNORE ||
1471 treatment == REG_REQ_ALREADY_SET) {
1472 kfree(user_request);
1476 user_request->intersect = treatment == REG_REQ_INTERSECT;
1477 user_request->processed = false;
1479 reg_update_last_request(user_request);
1481 user_alpha2[0] = user_request->alpha2[0];
1482 user_alpha2[1] = user_request->alpha2[1];
1484 return reg_call_crda(user_request);
1487 static enum reg_request_treatment
1488 __reg_process_hint_driver(struct regulatory_request *driver_request)
1490 struct regulatory_request *lr = get_last_request();
1492 if (lr->initiator == NL80211_REGDOM_SET_BY_CORE) {
1493 if (regdom_changes(driver_request->alpha2))
1495 return REG_REQ_ALREADY_SET;
1499 * This would happen if you unplug and plug your card
1500 * back in or if you add a new device for which the previously
1501 * loaded card also agrees on the regulatory domain.
1503 if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER &&
1504 !regdom_changes(driver_request->alpha2))
1505 return REG_REQ_ALREADY_SET;
1507 return REG_REQ_INTERSECT;
1511 * reg_process_hint_driver - process driver regulatory requests
1512 * @driver_request: a pending driver regulatory request
1514 * The wireless subsystem can use this function to process
1515 * a regulatory request issued by an 802.11 driver.
1517 * Returns one of the different reg request treatment values.
1519 static enum reg_request_treatment
1520 reg_process_hint_driver(struct wiphy *wiphy,
1521 struct regulatory_request *driver_request)
1523 const struct ieee80211_regdomain *regd;
1524 enum reg_request_treatment treatment;
1526 treatment = __reg_process_hint_driver(driver_request);
1528 switch (treatment) {
1531 case REG_REQ_IGNORE:
1532 kfree(driver_request);
1534 case REG_REQ_INTERSECT:
1536 case REG_REQ_ALREADY_SET:
1537 regd = reg_copy_regd(get_cfg80211_regdom());
1539 kfree(driver_request);
1540 return REG_REQ_IGNORE;
1542 rcu_assign_pointer(wiphy->regd, regd);
1546 driver_request->intersect = treatment == REG_REQ_INTERSECT;
1547 driver_request->processed = false;
1549 reg_update_last_request(driver_request);
1552 * Since CRDA will not be called in this case as we already
1553 * have applied the requested regulatory domain before we just
1554 * inform userspace we have processed the request
1556 if (treatment == REG_REQ_ALREADY_SET) {
1557 nl80211_send_reg_change_event(driver_request);
1558 reg_set_request_processed();
1562 return reg_call_crda(driver_request);
1565 static enum reg_request_treatment
1566 __reg_process_hint_country_ie(struct wiphy *wiphy,
1567 struct regulatory_request *country_ie_request)
1569 struct wiphy *last_wiphy = NULL;
1570 struct regulatory_request *lr = get_last_request();
1572 if (reg_request_cell_base(lr)) {
1573 /* Trust a Cell base station over the AP's country IE */
1574 if (regdom_changes(country_ie_request->alpha2))
1575 return REG_REQ_IGNORE;
1576 return REG_REQ_ALREADY_SET;
1578 if (wiphy->regulatory_flags & REGULATORY_COUNTRY_IE_IGNORE)
1579 return REG_REQ_IGNORE;
1582 if (unlikely(!is_an_alpha2(country_ie_request->alpha2)))
1585 if (lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE)
1588 last_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx);
1590 if (last_wiphy != wiphy) {
1592 * Two cards with two APs claiming different
1593 * Country IE alpha2s. We could
1594 * intersect them, but that seems unlikely
1595 * to be correct. Reject second one for now.
1597 if (regdom_changes(country_ie_request->alpha2))
1598 return REG_REQ_IGNORE;
1599 return REG_REQ_ALREADY_SET;
1602 * Two consecutive Country IE hints on the same wiphy.
1603 * This should be picked up early by the driver/stack
1605 if (WARN_ON(regdom_changes(country_ie_request->alpha2)))
1607 return REG_REQ_ALREADY_SET;
1611 * reg_process_hint_country_ie - process regulatory requests from country IEs
1612 * @country_ie_request: a regulatory request from a country IE
1614 * The wireless subsystem can use this function to process
1615 * a regulatory request issued by a country Information Element.
1617 * Returns one of the different reg request treatment values.
1619 static enum reg_request_treatment
1620 reg_process_hint_country_ie(struct wiphy *wiphy,
1621 struct regulatory_request *country_ie_request)
1623 enum reg_request_treatment treatment;
1625 treatment = __reg_process_hint_country_ie(wiphy, country_ie_request);
1627 switch (treatment) {
1630 case REG_REQ_IGNORE:
1632 case REG_REQ_ALREADY_SET:
1633 kfree(country_ie_request);
1635 case REG_REQ_INTERSECT:
1636 kfree(country_ie_request);
1638 * This doesn't happen yet, not sure we
1639 * ever want to support it for this case.
1641 WARN_ONCE(1, "Unexpected intersection for country IEs");
1642 return REG_REQ_IGNORE;
1645 country_ie_request->intersect = false;
1646 country_ie_request->processed = false;
1648 reg_update_last_request(country_ie_request);
1650 return reg_call_crda(country_ie_request);
1653 /* This processes *all* regulatory hints */
1654 static void reg_process_hint(struct regulatory_request *reg_request)
1656 struct wiphy *wiphy = NULL;
1657 enum reg_request_treatment treatment;
1659 if (WARN_ON(!reg_request->alpha2))
1662 if (reg_request->wiphy_idx != WIPHY_IDX_INVALID)
1663 wiphy = wiphy_idx_to_wiphy(reg_request->wiphy_idx);
1665 if (reg_request->initiator == NL80211_REGDOM_SET_BY_DRIVER && !wiphy) {
1670 switch (reg_request->initiator) {
1671 case NL80211_REGDOM_SET_BY_CORE:
1672 reg_process_hint_core(reg_request);
1674 case NL80211_REGDOM_SET_BY_USER:
1675 treatment = reg_process_hint_user(reg_request);
1676 if (treatment == REG_REQ_OK ||
1677 treatment == REG_REQ_ALREADY_SET)
1679 schedule_delayed_work(®_timeout, msecs_to_jiffies(3142));
1681 case NL80211_REGDOM_SET_BY_DRIVER:
1682 treatment = reg_process_hint_driver(wiphy, reg_request);
1684 case NL80211_REGDOM_SET_BY_COUNTRY_IE:
1685 treatment = reg_process_hint_country_ie(wiphy, reg_request);
1688 WARN(1, "invalid initiator %d\n", reg_request->initiator);
1692 /* This is required so that the orig_* parameters are saved */
1693 if (treatment == REG_REQ_ALREADY_SET && wiphy &&
1694 wiphy->regulatory_flags & REGULATORY_STRICT_REG)
1695 wiphy_update_regulatory(wiphy, reg_request->initiator);
1699 * Processes regulatory hints, this is all the NL80211_REGDOM_SET_BY_*
1700 * Regulatory hints come on a first come first serve basis and we
1701 * must process each one atomically.
1703 static void reg_process_pending_hints(void)
1705 struct regulatory_request *reg_request, *lr;
1707 lr = get_last_request();
1709 /* When last_request->processed becomes true this will be rescheduled */
1710 if (lr && !lr->processed) {
1711 REG_DBG_PRINT("Pending regulatory request, waiting for it to be processed...\n");
1715 spin_lock(®_requests_lock);
1717 if (list_empty(®_requests_list)) {
1718 spin_unlock(®_requests_lock);
1722 reg_request = list_first_entry(®_requests_list,
1723 struct regulatory_request,
1725 list_del_init(®_request->list);
1727 spin_unlock(®_requests_lock);
1729 reg_process_hint(reg_request);
1732 /* Processes beacon hints -- this has nothing to do with country IEs */
1733 static void reg_process_pending_beacon_hints(void)
1735 struct cfg80211_registered_device *rdev;
1736 struct reg_beacon *pending_beacon, *tmp;
1738 /* This goes through the _pending_ beacon list */
1739 spin_lock_bh(®_pending_beacons_lock);
1741 list_for_each_entry_safe(pending_beacon, tmp,
1742 ®_pending_beacons, list) {
1743 list_del_init(&pending_beacon->list);
1745 /* Applies the beacon hint to current wiphys */
1746 list_for_each_entry(rdev, &cfg80211_rdev_list, list)
1747 wiphy_update_new_beacon(&rdev->wiphy, pending_beacon);
1749 /* Remembers the beacon hint for new wiphys or reg changes */
1750 list_add_tail(&pending_beacon->list, ®_beacon_list);
1753 spin_unlock_bh(®_pending_beacons_lock);
1756 static void reg_todo(struct work_struct *work)
1759 reg_process_pending_hints();
1760 reg_process_pending_beacon_hints();
1764 static void queue_regulatory_request(struct regulatory_request *request)
1766 request->alpha2[0] = toupper(request->alpha2[0]);
1767 request->alpha2[1] = toupper(request->alpha2[1]);
1769 spin_lock(®_requests_lock);
1770 list_add_tail(&request->list, ®_requests_list);
1771 spin_unlock(®_requests_lock);
1773 schedule_work(®_work);
1777 * Core regulatory hint -- happens during cfg80211_init()
1778 * and when we restore regulatory settings.
1780 static int regulatory_hint_core(const char *alpha2)
1782 struct regulatory_request *request;
1784 request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL);
1788 request->alpha2[0] = alpha2[0];
1789 request->alpha2[1] = alpha2[1];
1790 request->initiator = NL80211_REGDOM_SET_BY_CORE;
1792 queue_regulatory_request(request);
1798 int regulatory_hint_user(const char *alpha2,
1799 enum nl80211_user_reg_hint_type user_reg_hint_type)
1801 struct regulatory_request *request;
1803 if (WARN_ON(!alpha2))
1806 request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL);
1810 request->wiphy_idx = WIPHY_IDX_INVALID;
1811 request->alpha2[0] = alpha2[0];
1812 request->alpha2[1] = alpha2[1];
1813 request->initiator = NL80211_REGDOM_SET_BY_USER;
1814 request->user_reg_hint_type = user_reg_hint_type;
1816 queue_regulatory_request(request);
1822 int regulatory_hint(struct wiphy *wiphy, const char *alpha2)
1824 struct regulatory_request *request;
1826 if (WARN_ON(!alpha2 || !wiphy))
1829 request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL);
1833 request->wiphy_idx = get_wiphy_idx(wiphy);
1835 request->alpha2[0] = alpha2[0];
1836 request->alpha2[1] = alpha2[1];
1837 request->initiator = NL80211_REGDOM_SET_BY_DRIVER;
1839 queue_regulatory_request(request);
1843 EXPORT_SYMBOL(regulatory_hint);
1845 void regulatory_hint_country_ie(struct wiphy *wiphy, enum ieee80211_band band,
1846 const u8 *country_ie, u8 country_ie_len)
1849 enum environment_cap env = ENVIRON_ANY;
1850 struct regulatory_request *request = NULL, *lr;
1852 /* IE len must be evenly divisible by 2 */
1853 if (country_ie_len & 0x01)
1856 if (country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
1859 request = kzalloc(sizeof(*request), GFP_KERNEL);
1863 alpha2[0] = country_ie[0];
1864 alpha2[1] = country_ie[1];
1866 if (country_ie[2] == 'I')
1867 env = ENVIRON_INDOOR;
1868 else if (country_ie[2] == 'O')
1869 env = ENVIRON_OUTDOOR;
1872 lr = get_last_request();
1878 * We will run this only upon a successful connection on cfg80211.
1879 * We leave conflict resolution to the workqueue, where can hold
1882 if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE &&
1883 lr->wiphy_idx != WIPHY_IDX_INVALID)
1886 request->wiphy_idx = get_wiphy_idx(wiphy);
1887 request->alpha2[0] = alpha2[0];
1888 request->alpha2[1] = alpha2[1];
1889 request->initiator = NL80211_REGDOM_SET_BY_COUNTRY_IE;
1890 request->country_ie_env = env;
1892 queue_regulatory_request(request);
1899 static void restore_alpha2(char *alpha2, bool reset_user)
1901 /* indicates there is no alpha2 to consider for restoration */
1905 /* The user setting has precedence over the module parameter */
1906 if (is_user_regdom_saved()) {
1907 /* Unless we're asked to ignore it and reset it */
1909 REG_DBG_PRINT("Restoring regulatory settings including user preference\n");
1910 user_alpha2[0] = '9';
1911 user_alpha2[1] = '7';
1914 * If we're ignoring user settings, we still need to
1915 * check the module parameter to ensure we put things
1916 * back as they were for a full restore.
1918 if (!is_world_regdom(ieee80211_regdom)) {
1919 REG_DBG_PRINT("Keeping preference on module parameter ieee80211_regdom: %c%c\n",
1920 ieee80211_regdom[0], ieee80211_regdom[1]);
1921 alpha2[0] = ieee80211_regdom[0];
1922 alpha2[1] = ieee80211_regdom[1];
1925 REG_DBG_PRINT("Restoring regulatory settings while preserving user preference for: %c%c\n",
1926 user_alpha2[0], user_alpha2[1]);
1927 alpha2[0] = user_alpha2[0];
1928 alpha2[1] = user_alpha2[1];
1930 } else if (!is_world_regdom(ieee80211_regdom)) {
1931 REG_DBG_PRINT("Keeping preference on module parameter ieee80211_regdom: %c%c\n",
1932 ieee80211_regdom[0], ieee80211_regdom[1]);
1933 alpha2[0] = ieee80211_regdom[0];
1934 alpha2[1] = ieee80211_regdom[1];
1936 REG_DBG_PRINT("Restoring regulatory settings\n");
1939 static void restore_custom_reg_settings(struct wiphy *wiphy)
1941 struct ieee80211_supported_band *sband;
1942 enum ieee80211_band band;
1943 struct ieee80211_channel *chan;
1946 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
1947 sband = wiphy->bands[band];
1950 for (i = 0; i < sband->n_channels; i++) {
1951 chan = &sband->channels[i];
1952 chan->flags = chan->orig_flags;
1953 chan->max_antenna_gain = chan->orig_mag;
1954 chan->max_power = chan->orig_mpwr;
1955 chan->beacon_found = false;
1961 * Restoring regulatory settings involves ingoring any
1962 * possibly stale country IE information and user regulatory
1963 * settings if so desired, this includes any beacon hints
1964 * learned as we could have traveled outside to another country
1965 * after disconnection. To restore regulatory settings we do
1966 * exactly what we did at bootup:
1968 * - send a core regulatory hint
1969 * - send a user regulatory hint if applicable
1971 * Device drivers that send a regulatory hint for a specific country
1972 * keep their own regulatory domain on wiphy->regd so that does does
1973 * not need to be remembered.
1975 static void restore_regulatory_settings(bool reset_user)
1978 char world_alpha2[2];
1979 struct reg_beacon *reg_beacon, *btmp;
1980 struct regulatory_request *reg_request, *tmp;
1981 LIST_HEAD(tmp_reg_req_list);
1982 struct cfg80211_registered_device *rdev;
1986 reset_regdomains(true, &world_regdom);
1987 restore_alpha2(alpha2, reset_user);
1990 * If there's any pending requests we simply
1991 * stash them to a temporary pending queue and
1992 * add then after we've restored regulatory
1995 spin_lock(®_requests_lock);
1996 list_for_each_entry_safe(reg_request, tmp, ®_requests_list, list) {
1997 if (reg_request->initiator != NL80211_REGDOM_SET_BY_USER)
1999 list_move_tail(®_request->list, &tmp_reg_req_list);
2001 spin_unlock(®_requests_lock);
2003 /* Clear beacon hints */
2004 spin_lock_bh(®_pending_beacons_lock);
2005 list_for_each_entry_safe(reg_beacon, btmp, ®_pending_beacons, list) {
2006 list_del(®_beacon->list);
2009 spin_unlock_bh(®_pending_beacons_lock);
2011 list_for_each_entry_safe(reg_beacon, btmp, ®_beacon_list, list) {
2012 list_del(®_beacon->list);
2016 /* First restore to the basic regulatory settings */
2017 world_alpha2[0] = cfg80211_world_regdom->alpha2[0];
2018 world_alpha2[1] = cfg80211_world_regdom->alpha2[1];
2020 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
2021 if (rdev->wiphy.regulatory_flags & REGULATORY_CUSTOM_REG)
2022 restore_custom_reg_settings(&rdev->wiphy);
2025 regulatory_hint_core(world_alpha2);
2028 * This restores the ieee80211_regdom module parameter
2029 * preference or the last user requested regulatory
2030 * settings, user regulatory settings takes precedence.
2032 if (is_an_alpha2(alpha2))
2033 regulatory_hint_user(user_alpha2, NL80211_USER_REG_HINT_USER);
2035 spin_lock(®_requests_lock);
2036 list_splice_tail_init(&tmp_reg_req_list, ®_requests_list);
2037 spin_unlock(®_requests_lock);
2039 REG_DBG_PRINT("Kicking the queue\n");
2041 schedule_work(®_work);
2044 void regulatory_hint_disconnect(void)
2046 REG_DBG_PRINT("All devices are disconnected, going to restore regulatory settings\n");
2047 restore_regulatory_settings(false);
2050 static bool freq_is_chan_12_13_14(u16 freq)
2052 if (freq == ieee80211_channel_to_frequency(12, IEEE80211_BAND_2GHZ) ||
2053 freq == ieee80211_channel_to_frequency(13, IEEE80211_BAND_2GHZ) ||
2054 freq == ieee80211_channel_to_frequency(14, IEEE80211_BAND_2GHZ))
2059 static bool pending_reg_beacon(struct ieee80211_channel *beacon_chan)
2061 struct reg_beacon *pending_beacon;
2063 list_for_each_entry(pending_beacon, ®_pending_beacons, list)
2064 if (beacon_chan->center_freq ==
2065 pending_beacon->chan.center_freq)
2070 int regulatory_hint_found_beacon(struct wiphy *wiphy,
2071 struct ieee80211_channel *beacon_chan,
2074 struct reg_beacon *reg_beacon;
2077 if (beacon_chan->beacon_found ||
2078 beacon_chan->flags & IEEE80211_CHAN_RADAR ||
2079 (beacon_chan->band == IEEE80211_BAND_2GHZ &&
2080 !freq_is_chan_12_13_14(beacon_chan->center_freq)))
2083 spin_lock_bh(®_pending_beacons_lock);
2084 processing = pending_reg_beacon(beacon_chan);
2085 spin_unlock_bh(®_pending_beacons_lock);
2090 reg_beacon = kzalloc(sizeof(struct reg_beacon), gfp);
2094 REG_DBG_PRINT("Found new beacon on frequency: %d MHz (Ch %d) on %s\n",
2095 beacon_chan->center_freq,
2096 ieee80211_frequency_to_channel(beacon_chan->center_freq),
2099 memcpy(®_beacon->chan, beacon_chan,
2100 sizeof(struct ieee80211_channel));
2103 * Since we can be called from BH or and non-BH context
2104 * we must use spin_lock_bh()
2106 spin_lock_bh(®_pending_beacons_lock);
2107 list_add_tail(®_beacon->list, ®_pending_beacons);
2108 spin_unlock_bh(®_pending_beacons_lock);
2110 schedule_work(®_work);
2115 static void print_rd_rules(const struct ieee80211_regdomain *rd)
2118 const struct ieee80211_reg_rule *reg_rule = NULL;
2119 const struct ieee80211_freq_range *freq_range = NULL;
2120 const struct ieee80211_power_rule *power_rule = NULL;
2122 pr_info(" (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)\n");
2124 for (i = 0; i < rd->n_reg_rules; i++) {
2125 reg_rule = &rd->reg_rules[i];
2126 freq_range = ®_rule->freq_range;
2127 power_rule = ®_rule->power_rule;
2130 * There may not be documentation for max antenna gain
2131 * in certain regions
2133 if (power_rule->max_antenna_gain)
2134 pr_info(" (%d KHz - %d KHz @ %d KHz), (%d mBi, %d mBm)\n",
2135 freq_range->start_freq_khz,
2136 freq_range->end_freq_khz,
2137 freq_range->max_bandwidth_khz,
2138 power_rule->max_antenna_gain,
2139 power_rule->max_eirp);
2141 pr_info(" (%d KHz - %d KHz @ %d KHz), (N/A, %d mBm)\n",
2142 freq_range->start_freq_khz,
2143 freq_range->end_freq_khz,
2144 freq_range->max_bandwidth_khz,
2145 power_rule->max_eirp);
2149 bool reg_supported_dfs_region(enum nl80211_dfs_regions dfs_region)
2151 switch (dfs_region) {
2152 case NL80211_DFS_UNSET:
2153 case NL80211_DFS_FCC:
2154 case NL80211_DFS_ETSI:
2155 case NL80211_DFS_JP:
2158 REG_DBG_PRINT("Ignoring uknown DFS master region: %d\n",
2164 static void print_regdomain(const struct ieee80211_regdomain *rd)
2166 struct regulatory_request *lr = get_last_request();
2168 if (is_intersected_alpha2(rd->alpha2)) {
2169 if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) {
2170 struct cfg80211_registered_device *rdev;
2171 rdev = cfg80211_rdev_by_wiphy_idx(lr->wiphy_idx);
2173 pr_info("Current regulatory domain updated by AP to: %c%c\n",
2174 rdev->country_ie_alpha2[0],
2175 rdev->country_ie_alpha2[1]);
2177 pr_info("Current regulatory domain intersected:\n");
2179 pr_info("Current regulatory domain intersected:\n");
2180 } else if (is_world_regdom(rd->alpha2)) {
2181 pr_info("World regulatory domain updated:\n");
2183 if (is_unknown_alpha2(rd->alpha2))
2184 pr_info("Regulatory domain changed to driver built-in settings (unknown country)\n");
2186 if (reg_request_cell_base(lr))
2187 pr_info("Regulatory domain changed to country: %c%c by Cell Station\n",
2188 rd->alpha2[0], rd->alpha2[1]);
2190 pr_info("Regulatory domain changed to country: %c%c\n",
2191 rd->alpha2[0], rd->alpha2[1]);
2195 pr_info(" DFS Master region: %s", reg_dfs_region_str(rd->dfs_region));
2199 static void print_regdomain_info(const struct ieee80211_regdomain *rd)
2201 pr_info("Regulatory domain: %c%c\n", rd->alpha2[0], rd->alpha2[1]);
2205 static int reg_set_rd_core(const struct ieee80211_regdomain *rd)
2207 if (!is_world_regdom(rd->alpha2))
2209 update_world_regdomain(rd);
2213 static int reg_set_rd_user(const struct ieee80211_regdomain *rd,
2214 struct regulatory_request *user_request)
2216 const struct ieee80211_regdomain *intersected_rd = NULL;
2218 if (is_world_regdom(rd->alpha2))
2221 if (!regdom_changes(rd->alpha2))
2224 if (!is_valid_rd(rd)) {
2225 pr_err("Invalid regulatory domain detected:\n");
2226 print_regdomain_info(rd);
2230 if (!user_request->intersect) {
2231 reset_regdomains(false, rd);
2235 intersected_rd = regdom_intersect(rd, get_cfg80211_regdom());
2236 if (!intersected_rd)
2241 reset_regdomains(false, intersected_rd);
2246 static int reg_set_rd_driver(const struct ieee80211_regdomain *rd,
2247 struct regulatory_request *driver_request)
2249 const struct ieee80211_regdomain *regd;
2250 const struct ieee80211_regdomain *intersected_rd = NULL;
2251 const struct ieee80211_regdomain *tmp;
2252 struct wiphy *request_wiphy;
2254 if (is_world_regdom(rd->alpha2))
2257 if (!regdom_changes(rd->alpha2))
2260 if (!is_valid_rd(rd)) {
2261 pr_err("Invalid regulatory domain detected:\n");
2262 print_regdomain_info(rd);
2266 request_wiphy = wiphy_idx_to_wiphy(driver_request->wiphy_idx);
2267 if (!request_wiphy) {
2268 schedule_delayed_work(®_timeout, 0);
2272 if (!driver_request->intersect) {
2273 if (request_wiphy->regd)
2276 regd = reg_copy_regd(rd);
2278 return PTR_ERR(regd);
2280 rcu_assign_pointer(request_wiphy->regd, regd);
2281 reset_regdomains(false, rd);
2285 intersected_rd = regdom_intersect(rd, get_cfg80211_regdom());
2286 if (!intersected_rd)
2290 * We can trash what CRDA provided now.
2291 * However if a driver requested this specific regulatory
2292 * domain we keep it for its private use
2294 tmp = get_wiphy_regdom(request_wiphy);
2295 rcu_assign_pointer(request_wiphy->regd, rd);
2296 rcu_free_regdom(tmp);
2300 reset_regdomains(false, intersected_rd);
2305 static int reg_set_rd_country_ie(const struct ieee80211_regdomain *rd,
2306 struct regulatory_request *country_ie_request)
2308 struct wiphy *request_wiphy;
2310 if (!is_alpha2_set(rd->alpha2) && !is_an_alpha2(rd->alpha2) &&
2311 !is_unknown_alpha2(rd->alpha2))
2315 * Lets only bother proceeding on the same alpha2 if the current
2316 * rd is non static (it means CRDA was present and was used last)
2317 * and the pending request came in from a country IE
2320 if (!is_valid_rd(rd)) {
2321 pr_err("Invalid regulatory domain detected:\n");
2322 print_regdomain_info(rd);
2326 request_wiphy = wiphy_idx_to_wiphy(country_ie_request->wiphy_idx);
2327 if (!request_wiphy) {
2328 schedule_delayed_work(®_timeout, 0);
2332 if (country_ie_request->intersect)
2335 reset_regdomains(false, rd);
2340 * Use this call to set the current regulatory domain. Conflicts with
2341 * multiple drivers can be ironed out later. Caller must've already
2342 * kmalloc'd the rd structure.
2344 int set_regdom(const struct ieee80211_regdomain *rd)
2346 struct regulatory_request *lr;
2349 if (!reg_is_valid_request(rd->alpha2)) {
2354 lr = get_last_request();
2356 /* Note that this doesn't update the wiphys, this is done below */
2357 switch (lr->initiator) {
2358 case NL80211_REGDOM_SET_BY_CORE:
2359 r = reg_set_rd_core(rd);
2361 case NL80211_REGDOM_SET_BY_USER:
2362 r = reg_set_rd_user(rd, lr);
2364 case NL80211_REGDOM_SET_BY_DRIVER:
2365 r = reg_set_rd_driver(rd, lr);
2367 case NL80211_REGDOM_SET_BY_COUNTRY_IE:
2368 r = reg_set_rd_country_ie(rd, lr);
2371 WARN(1, "invalid initiator %d\n", lr->initiator);
2377 reg_set_request_processed();
2383 /* This would make this whole thing pointless */
2384 if (WARN_ON(!lr->intersect && rd != get_cfg80211_regdom()))
2387 /* update all wiphys now with the new established regulatory domain */
2388 update_all_wiphy_regulatory(lr->initiator);
2390 print_regdomain(get_cfg80211_regdom());
2392 nl80211_send_reg_change_event(lr);
2394 reg_set_request_processed();
2399 int reg_device_uevent(struct device *dev, struct kobj_uevent_env *env)
2401 struct regulatory_request *lr;
2406 lr = get_last_request();
2407 if (lr && !lr->processed) {
2408 memcpy(alpha2, lr->alpha2, 2);
2414 return add_uevent_var(env, "COUNTRY=%c%c",
2415 alpha2[0], alpha2[1]);
2419 void wiphy_regulatory_register(struct wiphy *wiphy)
2421 struct regulatory_request *lr;
2423 if (!reg_dev_ignore_cell_hint(wiphy))
2424 reg_num_devs_support_basehint++;
2426 lr = get_last_request();
2427 wiphy_update_regulatory(wiphy, lr->initiator);
2430 void wiphy_regulatory_deregister(struct wiphy *wiphy)
2432 struct wiphy *request_wiphy = NULL;
2433 struct regulatory_request *lr;
2435 lr = get_last_request();
2437 if (!reg_dev_ignore_cell_hint(wiphy))
2438 reg_num_devs_support_basehint--;
2440 rcu_free_regdom(get_wiphy_regdom(wiphy));
2441 rcu_assign_pointer(wiphy->regd, NULL);
2444 request_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx);
2446 if (!request_wiphy || request_wiphy != wiphy)
2449 lr->wiphy_idx = WIPHY_IDX_INVALID;
2450 lr->country_ie_env = ENVIRON_ANY;
2453 static void reg_timeout_work(struct work_struct *work)
2455 REG_DBG_PRINT("Timeout while waiting for CRDA to reply, restoring regulatory settings\n");
2457 restore_regulatory_settings(true);
2461 int __init regulatory_init(void)
2465 reg_pdev = platform_device_register_simple("regulatory", 0, NULL, 0);
2466 if (IS_ERR(reg_pdev))
2467 return PTR_ERR(reg_pdev);
2469 reg_pdev->dev.type = ®_device_type;
2471 spin_lock_init(®_requests_lock);
2472 spin_lock_init(®_pending_beacons_lock);
2474 reg_regdb_size_check();
2476 rcu_assign_pointer(cfg80211_regdomain, cfg80211_world_regdom);
2478 user_alpha2[0] = '9';
2479 user_alpha2[1] = '7';
2481 /* We always try to get an update for the static regdomain */
2482 err = regulatory_hint_core(cfg80211_world_regdom->alpha2);
2487 * N.B. kobject_uevent_env() can fail mainly for when we're out
2488 * memory which is handled and propagated appropriately above
2489 * but it can also fail during a netlink_broadcast() or during
2490 * early boot for call_usermodehelper(). For now treat these
2491 * errors as non-fatal.
2493 pr_err("kobject_uevent_env() was unable to call CRDA during init\n");
2497 * Finally, if the user set the module parameter treat it
2500 if (!is_world_regdom(ieee80211_regdom))
2501 regulatory_hint_user(ieee80211_regdom,
2502 NL80211_USER_REG_HINT_USER);
2507 void regulatory_exit(void)
2509 struct regulatory_request *reg_request, *tmp;
2510 struct reg_beacon *reg_beacon, *btmp;
2512 cancel_work_sync(®_work);
2513 cancel_delayed_work_sync(®_timeout);
2515 /* Lock to suppress warnings */
2517 reset_regdomains(true, NULL);
2520 dev_set_uevent_suppress(®_pdev->dev, true);
2522 platform_device_unregister(reg_pdev);
2524 list_for_each_entry_safe(reg_beacon, btmp, ®_pending_beacons, list) {
2525 list_del(®_beacon->list);
2529 list_for_each_entry_safe(reg_beacon, btmp, ®_beacon_list, list) {
2530 list_del(®_beacon->list);
2534 list_for_each_entry_safe(reg_request, tmp, ®_requests_list, list) {
2535 list_del(®_request->list);