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>
63 #ifdef CONFIG_CFG80211_REG_DEBUG
64 #define REG_DBG_PRINT(format, args...) \
65 printk(KERN_DEBUG pr_fmt(format), ##args)
67 #define REG_DBG_PRINT(args...)
71 * Grace period we give before making sure all current interfaces reside on
72 * channels allowed by the current regulatory domain.
74 #define REG_ENFORCE_GRACE_MS 60000
77 * enum reg_request_treatment - regulatory request treatment
79 * @REG_REQ_OK: continue processing the regulatory request
80 * @REG_REQ_IGNORE: ignore the regulatory request
81 * @REG_REQ_INTERSECT: the regulatory domain resulting from this request should
82 * be intersected with the current one.
83 * @REG_REQ_ALREADY_SET: the regulatory request will not change the current
84 * regulatory settings, and no further processing is required.
86 enum reg_request_treatment {
93 static struct regulatory_request core_request_world = {
94 .initiator = NL80211_REGDOM_SET_BY_CORE,
99 .country_ie_env = ENVIRON_ANY,
103 * Receipt of information from last regulatory request,
104 * protected by RTNL (and can be accessed with RCU protection)
106 static struct regulatory_request __rcu *last_request =
107 (void __force __rcu *)&core_request_world;
109 /* To trigger userspace events */
110 static struct platform_device *reg_pdev;
113 * Central wireless core regulatory domains, we only need two,
114 * the current one and a world regulatory domain in case we have no
115 * information to give us an alpha2.
116 * (protected by RTNL, can be read under RCU)
118 const struct ieee80211_regdomain __rcu *cfg80211_regdomain;
121 * Number of devices that registered to the core
122 * that support cellular base station regulatory hints
123 * (protected by RTNL)
125 static int reg_num_devs_support_basehint;
128 * State variable indicating if the platform on which the devices
129 * are attached is operating in an indoor environment. The state variable
130 * is relevant for all registered devices.
132 static bool reg_is_indoor;
133 static spinlock_t reg_indoor_lock;
135 /* Used to track the userspace process controlling the indoor setting */
136 static u32 reg_is_indoor_portid;
138 /* Max number of consecutive attempts to communicate with CRDA */
139 #define REG_MAX_CRDA_TIMEOUTS 10
141 static u32 reg_crda_timeouts;
143 static const struct ieee80211_regdomain *get_cfg80211_regdom(void)
145 return rtnl_dereference(cfg80211_regdomain);
148 const struct ieee80211_regdomain *get_wiphy_regdom(struct wiphy *wiphy)
150 return rtnl_dereference(wiphy->regd);
153 static const char *reg_dfs_region_str(enum nl80211_dfs_regions dfs_region)
155 switch (dfs_region) {
156 case NL80211_DFS_UNSET:
158 case NL80211_DFS_FCC:
160 case NL80211_DFS_ETSI:
168 enum nl80211_dfs_regions reg_get_dfs_region(struct wiphy *wiphy)
170 const struct ieee80211_regdomain *regd = NULL;
171 const struct ieee80211_regdomain *wiphy_regd = NULL;
173 regd = get_cfg80211_regdom();
177 wiphy_regd = get_wiphy_regdom(wiphy);
181 if (wiphy_regd->dfs_region == regd->dfs_region)
184 REG_DBG_PRINT("%s: device specific dfs_region "
185 "(%s) disagrees with cfg80211's "
186 "central dfs_region (%s)\n",
187 dev_name(&wiphy->dev),
188 reg_dfs_region_str(wiphy_regd->dfs_region),
189 reg_dfs_region_str(regd->dfs_region));
192 return regd->dfs_region;
195 static void rcu_free_regdom(const struct ieee80211_regdomain *r)
199 kfree_rcu((struct ieee80211_regdomain *)r, rcu_head);
202 static struct regulatory_request *get_last_request(void)
204 return rcu_dereference_rtnl(last_request);
207 /* Used to queue up regulatory hints */
208 static LIST_HEAD(reg_requests_list);
209 static spinlock_t reg_requests_lock;
211 /* Used to queue up beacon hints for review */
212 static LIST_HEAD(reg_pending_beacons);
213 static spinlock_t reg_pending_beacons_lock;
215 /* Used to keep track of processed beacon hints */
216 static LIST_HEAD(reg_beacon_list);
219 struct list_head list;
220 struct ieee80211_channel chan;
223 static void reg_check_chans_work(struct work_struct *work);
224 static DECLARE_DELAYED_WORK(reg_check_chans, reg_check_chans_work);
226 static void reg_todo(struct work_struct *work);
227 static DECLARE_WORK(reg_work, reg_todo);
229 static void reg_timeout_work(struct work_struct *work);
230 static DECLARE_DELAYED_WORK(reg_timeout, reg_timeout_work);
232 /* We keep a static world regulatory domain in case of the absence of CRDA */
233 static const struct ieee80211_regdomain world_regdom = {
237 /* IEEE 802.11b/g, channels 1..11 */
238 REG_RULE(2412-10, 2462+10, 40, 6, 20, 0),
239 /* IEEE 802.11b/g, channels 12..13. */
240 REG_RULE(2467-10, 2472+10, 40, 6, 20,
242 /* IEEE 802.11 channel 14 - Only JP enables
243 * this and for 802.11b only */
244 REG_RULE(2484-10, 2484+10, 20, 6, 20,
246 NL80211_RRF_NO_OFDM),
247 /* IEEE 802.11a, channel 36..48 */
248 REG_RULE(5180-10, 5240+10, 160, 6, 20,
251 /* IEEE 802.11a, channel 52..64 - DFS required */
252 REG_RULE(5260-10, 5320+10, 160, 6, 20,
256 /* IEEE 802.11a, channel 100..144 - DFS required */
257 REG_RULE(5500-10, 5720+10, 160, 6, 20,
261 /* IEEE 802.11a, channel 149..165 */
262 REG_RULE(5745-10, 5825+10, 80, 6, 20,
265 /* IEEE 802.11ad (60GHz), channels 1..3 */
266 REG_RULE(56160+2160*1-1080, 56160+2160*3+1080, 2160, 0, 0, 0),
270 /* protected by RTNL */
271 static const struct ieee80211_regdomain *cfg80211_world_regdom =
274 static char *ieee80211_regdom = "00";
275 static char user_alpha2[2];
277 module_param(ieee80211_regdom, charp, 0444);
278 MODULE_PARM_DESC(ieee80211_regdom, "IEEE 802.11 regulatory domain code");
280 static void reg_free_request(struct regulatory_request *request)
282 if (request != get_last_request())
286 static void reg_free_last_request(void)
288 struct regulatory_request *lr = get_last_request();
290 if (lr != &core_request_world && lr)
291 kfree_rcu(lr, rcu_head);
294 static void reg_update_last_request(struct regulatory_request *request)
296 struct regulatory_request *lr;
298 lr = get_last_request();
302 reg_free_last_request();
303 rcu_assign_pointer(last_request, request);
306 static void reset_regdomains(bool full_reset,
307 const struct ieee80211_regdomain *new_regdom)
309 const struct ieee80211_regdomain *r;
313 r = get_cfg80211_regdom();
315 /* avoid freeing static information or freeing something twice */
316 if (r == cfg80211_world_regdom)
318 if (cfg80211_world_regdom == &world_regdom)
319 cfg80211_world_regdom = NULL;
320 if (r == &world_regdom)
324 rcu_free_regdom(cfg80211_world_regdom);
326 cfg80211_world_regdom = &world_regdom;
327 rcu_assign_pointer(cfg80211_regdomain, new_regdom);
332 reg_update_last_request(&core_request_world);
336 * Dynamic world regulatory domain requested by the wireless
337 * core upon initialization
339 static void update_world_regdomain(const struct ieee80211_regdomain *rd)
341 struct regulatory_request *lr;
343 lr = get_last_request();
347 reset_regdomains(false, rd);
349 cfg80211_world_regdom = rd;
352 bool is_world_regdom(const char *alpha2)
356 return alpha2[0] == '0' && alpha2[1] == '0';
359 static bool is_alpha2_set(const char *alpha2)
363 return alpha2[0] && alpha2[1];
366 static bool is_unknown_alpha2(const char *alpha2)
371 * Special case where regulatory domain was built by driver
372 * but a specific alpha2 cannot be determined
374 return alpha2[0] == '9' && alpha2[1] == '9';
377 static bool is_intersected_alpha2(const char *alpha2)
382 * Special case where regulatory domain is the
383 * result of an intersection between two regulatory domain
386 return alpha2[0] == '9' && alpha2[1] == '8';
389 static bool is_an_alpha2(const char *alpha2)
393 return isalpha(alpha2[0]) && isalpha(alpha2[1]);
396 static bool alpha2_equal(const char *alpha2_x, const char *alpha2_y)
398 if (!alpha2_x || !alpha2_y)
400 return alpha2_x[0] == alpha2_y[0] && alpha2_x[1] == alpha2_y[1];
403 static bool regdom_changes(const char *alpha2)
405 const struct ieee80211_regdomain *r = get_cfg80211_regdom();
409 return !alpha2_equal(r->alpha2, alpha2);
413 * The NL80211_REGDOM_SET_BY_USER regdom alpha2 is cached, this lets
414 * you know if a valid regulatory hint with NL80211_REGDOM_SET_BY_USER
415 * has ever been issued.
417 static bool is_user_regdom_saved(void)
419 if (user_alpha2[0] == '9' && user_alpha2[1] == '7')
422 /* This would indicate a mistake on the design */
423 if (WARN(!is_world_regdom(user_alpha2) && !is_an_alpha2(user_alpha2),
424 "Unexpected user alpha2: %c%c\n",
425 user_alpha2[0], user_alpha2[1]))
431 static const struct ieee80211_regdomain *
432 reg_copy_regd(const struct ieee80211_regdomain *src_regd)
434 struct ieee80211_regdomain *regd;
439 sizeof(struct ieee80211_regdomain) +
440 src_regd->n_reg_rules * sizeof(struct ieee80211_reg_rule);
442 regd = kzalloc(size_of_regd, GFP_KERNEL);
444 return ERR_PTR(-ENOMEM);
446 memcpy(regd, src_regd, sizeof(struct ieee80211_regdomain));
448 for (i = 0; i < src_regd->n_reg_rules; i++)
449 memcpy(®d->reg_rules[i], &src_regd->reg_rules[i],
450 sizeof(struct ieee80211_reg_rule));
455 #ifdef CONFIG_CFG80211_INTERNAL_REGDB
456 struct reg_regdb_search_request {
458 struct list_head list;
461 static LIST_HEAD(reg_regdb_search_list);
462 static DEFINE_MUTEX(reg_regdb_search_mutex);
464 static void reg_regdb_search(struct work_struct *work)
466 struct reg_regdb_search_request *request;
467 const struct ieee80211_regdomain *curdom, *regdom = NULL;
472 mutex_lock(®_regdb_search_mutex);
473 while (!list_empty(®_regdb_search_list)) {
474 request = list_first_entry(®_regdb_search_list,
475 struct reg_regdb_search_request,
477 list_del(&request->list);
479 for (i = 0; i < reg_regdb_size; i++) {
480 curdom = reg_regdb[i];
482 if (alpha2_equal(request->alpha2, curdom->alpha2)) {
483 regdom = reg_copy_regd(curdom);
490 mutex_unlock(®_regdb_search_mutex);
492 if (!IS_ERR_OR_NULL(regdom))
493 set_regdom(regdom, REGD_SOURCE_INTERNAL_DB);
498 static DECLARE_WORK(reg_regdb_work, reg_regdb_search);
500 static void reg_regdb_query(const char *alpha2)
502 struct reg_regdb_search_request *request;
504 request = kzalloc(sizeof(struct reg_regdb_search_request), GFP_KERNEL);
508 memcpy(request->alpha2, alpha2, 2);
510 mutex_lock(®_regdb_search_mutex);
511 list_add_tail(&request->list, ®_regdb_search_list);
512 mutex_unlock(®_regdb_search_mutex);
514 schedule_work(®_regdb_work);
517 /* Feel free to add any other sanity checks here */
518 static void reg_regdb_size_check(void)
520 /* We should ideally BUILD_BUG_ON() but then random builds would fail */
521 WARN_ONCE(!reg_regdb_size, "db.txt is empty, you should update it...");
524 static inline void reg_regdb_size_check(void) {}
525 static inline void reg_regdb_query(const char *alpha2) {}
526 #endif /* CONFIG_CFG80211_INTERNAL_REGDB */
529 * This lets us keep regulatory code which is updated on a regulatory
530 * basis in userspace.
532 static int call_crda(const char *alpha2)
535 char *env[] = { country, NULL };
537 snprintf(country, sizeof(country), "COUNTRY=%c%c",
538 alpha2[0], alpha2[1]);
540 /* query internal regulatory database (if it exists) */
541 reg_regdb_query(alpha2);
543 if (reg_crda_timeouts > REG_MAX_CRDA_TIMEOUTS) {
544 pr_debug("Exceeded CRDA call max attempts. Not calling CRDA\n");
548 if (!is_world_regdom((char *) alpha2))
549 pr_debug("Calling CRDA for country: %c%c\n",
550 alpha2[0], alpha2[1]);
552 pr_debug("Calling CRDA to update world regulatory domain\n");
554 return kobject_uevent_env(®_pdev->dev.kobj, KOBJ_CHANGE, env);
557 static enum reg_request_treatment
558 reg_call_crda(struct regulatory_request *request)
560 if (call_crda(request->alpha2))
561 return REG_REQ_IGNORE;
563 queue_delayed_work(system_power_efficient_wq,
564 ®_timeout, msecs_to_jiffies(3142));
568 bool reg_is_valid_request(const char *alpha2)
570 struct regulatory_request *lr = get_last_request();
572 if (!lr || lr->processed)
575 return alpha2_equal(lr->alpha2, alpha2);
578 static const struct ieee80211_regdomain *reg_get_regdomain(struct wiphy *wiphy)
580 struct regulatory_request *lr = get_last_request();
583 * Follow the driver's regulatory domain, if present, unless a country
584 * IE has been processed or a user wants to help complaince further
586 if (lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE &&
587 lr->initiator != NL80211_REGDOM_SET_BY_USER &&
589 return get_wiphy_regdom(wiphy);
591 return get_cfg80211_regdom();
595 reg_get_max_bandwidth_from_range(const struct ieee80211_regdomain *rd,
596 const struct ieee80211_reg_rule *rule)
598 const struct ieee80211_freq_range *freq_range = &rule->freq_range;
599 const struct ieee80211_freq_range *freq_range_tmp;
600 const struct ieee80211_reg_rule *tmp;
601 u32 start_freq, end_freq, idx, no;
603 for (idx = 0; idx < rd->n_reg_rules; idx++)
604 if (rule == &rd->reg_rules[idx])
607 if (idx == rd->n_reg_rules)
614 tmp = &rd->reg_rules[--no];
615 freq_range_tmp = &tmp->freq_range;
617 if (freq_range_tmp->end_freq_khz < freq_range->start_freq_khz)
620 freq_range = freq_range_tmp;
623 start_freq = freq_range->start_freq_khz;
626 freq_range = &rule->freq_range;
629 while (no < rd->n_reg_rules - 1) {
630 tmp = &rd->reg_rules[++no];
631 freq_range_tmp = &tmp->freq_range;
633 if (freq_range_tmp->start_freq_khz > freq_range->end_freq_khz)
636 freq_range = freq_range_tmp;
639 end_freq = freq_range->end_freq_khz;
641 return end_freq - start_freq;
644 unsigned int reg_get_max_bandwidth(const struct ieee80211_regdomain *rd,
645 const struct ieee80211_reg_rule *rule)
647 unsigned int bw = reg_get_max_bandwidth_from_range(rd, rule);
649 if (rule->flags & NL80211_RRF_NO_160MHZ)
650 bw = min_t(unsigned int, bw, MHZ_TO_KHZ(80));
651 if (rule->flags & NL80211_RRF_NO_80MHZ)
652 bw = min_t(unsigned int, bw, MHZ_TO_KHZ(40));
655 * HT40+/HT40- limits are handled per-channel. Only limit BW if both
658 if (rule->flags & NL80211_RRF_NO_HT40MINUS &&
659 rule->flags & NL80211_RRF_NO_HT40PLUS)
660 bw = min_t(unsigned int, bw, MHZ_TO_KHZ(20));
665 /* Sanity check on a regulatory rule */
666 static bool is_valid_reg_rule(const struct ieee80211_reg_rule *rule)
668 const struct ieee80211_freq_range *freq_range = &rule->freq_range;
671 if (freq_range->start_freq_khz <= 0 || freq_range->end_freq_khz <= 0)
674 if (freq_range->start_freq_khz > freq_range->end_freq_khz)
677 freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz;
679 if (freq_range->end_freq_khz <= freq_range->start_freq_khz ||
680 freq_range->max_bandwidth_khz > freq_diff)
686 static bool is_valid_rd(const struct ieee80211_regdomain *rd)
688 const struct ieee80211_reg_rule *reg_rule = NULL;
691 if (!rd->n_reg_rules)
694 if (WARN_ON(rd->n_reg_rules > NL80211_MAX_SUPP_REG_RULES))
697 for (i = 0; i < rd->n_reg_rules; i++) {
698 reg_rule = &rd->reg_rules[i];
699 if (!is_valid_reg_rule(reg_rule))
706 static bool reg_does_bw_fit(const struct ieee80211_freq_range *freq_range,
707 u32 center_freq_khz, u32 bw_khz)
709 u32 start_freq_khz, end_freq_khz;
711 start_freq_khz = center_freq_khz - (bw_khz/2);
712 end_freq_khz = center_freq_khz + (bw_khz/2);
714 if (start_freq_khz >= freq_range->start_freq_khz &&
715 end_freq_khz <= freq_range->end_freq_khz)
722 * freq_in_rule_band - tells us if a frequency is in a frequency band
723 * @freq_range: frequency rule we want to query
724 * @freq_khz: frequency we are inquiring about
726 * This lets us know if a specific frequency rule is or is not relevant to
727 * a specific frequency's band. Bands are device specific and artificial
728 * definitions (the "2.4 GHz band", the "5 GHz band" and the "60GHz band"),
729 * however it is safe for now to assume that a frequency rule should not be
730 * part of a frequency's band if the start freq or end freq are off by more
731 * than 2 GHz for the 2.4 and 5 GHz bands, and by more than 10 GHz for the
733 * This resolution can be lowered and should be considered as we add
734 * regulatory rule support for other "bands".
736 static bool freq_in_rule_band(const struct ieee80211_freq_range *freq_range,
739 #define ONE_GHZ_IN_KHZ 1000000
741 * From 802.11ad: directional multi-gigabit (DMG):
742 * Pertaining to operation in a frequency band containing a channel
743 * with the Channel starting frequency above 45 GHz.
745 u32 limit = freq_khz > 45 * ONE_GHZ_IN_KHZ ?
746 10 * ONE_GHZ_IN_KHZ : 2 * ONE_GHZ_IN_KHZ;
747 if (abs(freq_khz - freq_range->start_freq_khz) <= limit)
749 if (abs(freq_khz - freq_range->end_freq_khz) <= limit)
752 #undef ONE_GHZ_IN_KHZ
756 * Later on we can perhaps use the more restrictive DFS
757 * region but we don't have information for that yet so
758 * for now simply disallow conflicts.
760 static enum nl80211_dfs_regions
761 reg_intersect_dfs_region(const enum nl80211_dfs_regions dfs_region1,
762 const enum nl80211_dfs_regions dfs_region2)
764 if (dfs_region1 != dfs_region2)
765 return NL80211_DFS_UNSET;
770 * Helper for regdom_intersect(), this does the real
771 * mathematical intersection fun
773 static int reg_rules_intersect(const struct ieee80211_regdomain *rd1,
774 const struct ieee80211_regdomain *rd2,
775 const struct ieee80211_reg_rule *rule1,
776 const struct ieee80211_reg_rule *rule2,
777 struct ieee80211_reg_rule *intersected_rule)
779 const struct ieee80211_freq_range *freq_range1, *freq_range2;
780 struct ieee80211_freq_range *freq_range;
781 const struct ieee80211_power_rule *power_rule1, *power_rule2;
782 struct ieee80211_power_rule *power_rule;
783 u32 freq_diff, max_bandwidth1, max_bandwidth2;
785 freq_range1 = &rule1->freq_range;
786 freq_range2 = &rule2->freq_range;
787 freq_range = &intersected_rule->freq_range;
789 power_rule1 = &rule1->power_rule;
790 power_rule2 = &rule2->power_rule;
791 power_rule = &intersected_rule->power_rule;
793 freq_range->start_freq_khz = max(freq_range1->start_freq_khz,
794 freq_range2->start_freq_khz);
795 freq_range->end_freq_khz = min(freq_range1->end_freq_khz,
796 freq_range2->end_freq_khz);
798 max_bandwidth1 = freq_range1->max_bandwidth_khz;
799 max_bandwidth2 = freq_range2->max_bandwidth_khz;
801 if (rule1->flags & NL80211_RRF_AUTO_BW)
802 max_bandwidth1 = reg_get_max_bandwidth(rd1, rule1);
803 if (rule2->flags & NL80211_RRF_AUTO_BW)
804 max_bandwidth2 = reg_get_max_bandwidth(rd2, rule2);
806 freq_range->max_bandwidth_khz = min(max_bandwidth1, max_bandwidth2);
808 intersected_rule->flags = rule1->flags | rule2->flags;
811 * In case NL80211_RRF_AUTO_BW requested for both rules
812 * set AUTO_BW in intersected rule also. Next we will
813 * calculate BW correctly in handle_channel function.
814 * In other case remove AUTO_BW flag while we calculate
815 * maximum bandwidth correctly and auto calculation is
818 if ((rule1->flags & NL80211_RRF_AUTO_BW) &&
819 (rule2->flags & NL80211_RRF_AUTO_BW))
820 intersected_rule->flags |= NL80211_RRF_AUTO_BW;
822 intersected_rule->flags &= ~NL80211_RRF_AUTO_BW;
824 freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz;
825 if (freq_range->max_bandwidth_khz > freq_diff)
826 freq_range->max_bandwidth_khz = freq_diff;
828 power_rule->max_eirp = min(power_rule1->max_eirp,
829 power_rule2->max_eirp);
830 power_rule->max_antenna_gain = min(power_rule1->max_antenna_gain,
831 power_rule2->max_antenna_gain);
833 intersected_rule->dfs_cac_ms = max(rule1->dfs_cac_ms,
836 if (!is_valid_reg_rule(intersected_rule))
842 /* check whether old rule contains new rule */
843 static bool rule_contains(struct ieee80211_reg_rule *r1,
844 struct ieee80211_reg_rule *r2)
846 /* for simplicity, currently consider only same flags */
847 if (r1->flags != r2->flags)
850 /* verify r1 is more restrictive */
851 if ((r1->power_rule.max_antenna_gain >
852 r2->power_rule.max_antenna_gain) ||
853 r1->power_rule.max_eirp > r2->power_rule.max_eirp)
856 /* make sure r2's range is contained within r1 */
857 if (r1->freq_range.start_freq_khz > r2->freq_range.start_freq_khz ||
858 r1->freq_range.end_freq_khz < r2->freq_range.end_freq_khz)
861 /* and finally verify that r1.max_bw >= r2.max_bw */
862 if (r1->freq_range.max_bandwidth_khz <
863 r2->freq_range.max_bandwidth_khz)
869 /* add or extend current rules. do nothing if rule is already contained */
870 static void add_rule(struct ieee80211_reg_rule *rule,
871 struct ieee80211_reg_rule *reg_rules, u32 *n_rules)
873 struct ieee80211_reg_rule *tmp_rule;
876 for (i = 0; i < *n_rules; i++) {
877 tmp_rule = ®_rules[i];
878 /* rule is already contained - do nothing */
879 if (rule_contains(tmp_rule, rule))
882 /* extend rule if possible */
883 if (rule_contains(rule, tmp_rule)) {
884 memcpy(tmp_rule, rule, sizeof(*rule));
889 memcpy(®_rules[*n_rules], rule, sizeof(*rule));
894 * regdom_intersect - do the intersection between two regulatory domains
895 * @rd1: first regulatory domain
896 * @rd2: second regulatory domain
898 * Use this function to get the intersection between two regulatory domains.
899 * Once completed we will mark the alpha2 for the rd as intersected, "98",
900 * as no one single alpha2 can represent this regulatory domain.
902 * Returns a pointer to the regulatory domain structure which will hold the
903 * resulting intersection of rules between rd1 and rd2. We will
904 * kzalloc() this structure for you.
906 static struct ieee80211_regdomain *
907 regdom_intersect(const struct ieee80211_regdomain *rd1,
908 const struct ieee80211_regdomain *rd2)
912 unsigned int num_rules = 0;
913 const struct ieee80211_reg_rule *rule1, *rule2;
914 struct ieee80211_reg_rule intersected_rule;
915 struct ieee80211_regdomain *rd;
921 * First we get a count of the rules we'll need, then we actually
922 * build them. This is to so we can malloc() and free() a
923 * regdomain once. The reason we use reg_rules_intersect() here
924 * is it will return -EINVAL if the rule computed makes no sense.
925 * All rules that do check out OK are valid.
928 for (x = 0; x < rd1->n_reg_rules; x++) {
929 rule1 = &rd1->reg_rules[x];
930 for (y = 0; y < rd2->n_reg_rules; y++) {
931 rule2 = &rd2->reg_rules[y];
932 if (!reg_rules_intersect(rd1, rd2, rule1, rule2,
941 size_of_regd = sizeof(struct ieee80211_regdomain) +
942 num_rules * sizeof(struct ieee80211_reg_rule);
944 rd = kzalloc(size_of_regd, GFP_KERNEL);
948 for (x = 0; x < rd1->n_reg_rules; x++) {
949 rule1 = &rd1->reg_rules[x];
950 for (y = 0; y < rd2->n_reg_rules; y++) {
951 rule2 = &rd2->reg_rules[y];
952 r = reg_rules_intersect(rd1, rd2, rule1, rule2,
955 * No need to memset here the intersected rule here as
956 * we're not using the stack anymore
961 add_rule(&intersected_rule, rd->reg_rules,
968 rd->dfs_region = reg_intersect_dfs_region(rd1->dfs_region,
975 * XXX: add support for the rest of enum nl80211_reg_rule_flags, we may
976 * want to just have the channel structure use these
978 static u32 map_regdom_flags(u32 rd_flags)
980 u32 channel_flags = 0;
981 if (rd_flags & NL80211_RRF_NO_IR_ALL)
982 channel_flags |= IEEE80211_CHAN_NO_IR;
983 if (rd_flags & NL80211_RRF_DFS)
984 channel_flags |= IEEE80211_CHAN_RADAR;
985 if (rd_flags & NL80211_RRF_NO_OFDM)
986 channel_flags |= IEEE80211_CHAN_NO_OFDM;
987 if (rd_flags & NL80211_RRF_NO_OUTDOOR)
988 channel_flags |= IEEE80211_CHAN_INDOOR_ONLY;
989 if (rd_flags & NL80211_RRF_IR_CONCURRENT)
990 channel_flags |= IEEE80211_CHAN_IR_CONCURRENT;
991 if (rd_flags & NL80211_RRF_NO_HT40MINUS)
992 channel_flags |= IEEE80211_CHAN_NO_HT40MINUS;
993 if (rd_flags & NL80211_RRF_NO_HT40PLUS)
994 channel_flags |= IEEE80211_CHAN_NO_HT40PLUS;
995 if (rd_flags & NL80211_RRF_NO_80MHZ)
996 channel_flags |= IEEE80211_CHAN_NO_80MHZ;
997 if (rd_flags & NL80211_RRF_NO_160MHZ)
998 channel_flags |= IEEE80211_CHAN_NO_160MHZ;
999 return channel_flags;
1002 static const struct ieee80211_reg_rule *
1003 freq_reg_info_regd(struct wiphy *wiphy, u32 center_freq,
1004 const struct ieee80211_regdomain *regd, u32 bw)
1007 bool band_rule_found = false;
1008 bool bw_fits = false;
1011 return ERR_PTR(-EINVAL);
1013 for (i = 0; i < regd->n_reg_rules; i++) {
1014 const struct ieee80211_reg_rule *rr;
1015 const struct ieee80211_freq_range *fr = NULL;
1017 rr = ®d->reg_rules[i];
1018 fr = &rr->freq_range;
1021 * We only need to know if one frequency rule was
1022 * was in center_freq's band, that's enough, so lets
1023 * not overwrite it once found
1025 if (!band_rule_found)
1026 band_rule_found = freq_in_rule_band(fr, center_freq);
1028 bw_fits = reg_does_bw_fit(fr, center_freq, bw);
1030 if (band_rule_found && bw_fits)
1034 if (!band_rule_found)
1035 return ERR_PTR(-ERANGE);
1037 return ERR_PTR(-EINVAL);
1040 static const struct ieee80211_reg_rule *
1041 __freq_reg_info(struct wiphy *wiphy, u32 center_freq, u32 min_bw)
1043 const struct ieee80211_regdomain *regd = reg_get_regdomain(wiphy);
1044 const struct ieee80211_reg_rule *reg_rule = NULL;
1047 for (bw = MHZ_TO_KHZ(20); bw >= min_bw; bw = bw / 2) {
1048 reg_rule = freq_reg_info_regd(wiphy, center_freq, regd, bw);
1049 if (!IS_ERR(reg_rule))
1056 const struct ieee80211_reg_rule *freq_reg_info(struct wiphy *wiphy,
1059 return __freq_reg_info(wiphy, center_freq, MHZ_TO_KHZ(20));
1061 EXPORT_SYMBOL(freq_reg_info);
1063 const char *reg_initiator_name(enum nl80211_reg_initiator initiator)
1065 switch (initiator) {
1066 case NL80211_REGDOM_SET_BY_CORE:
1068 case NL80211_REGDOM_SET_BY_USER:
1070 case NL80211_REGDOM_SET_BY_DRIVER:
1072 case NL80211_REGDOM_SET_BY_COUNTRY_IE:
1073 return "country IE";
1079 EXPORT_SYMBOL(reg_initiator_name);
1081 #ifdef CONFIG_CFG80211_REG_DEBUG
1082 static void chan_reg_rule_print_dbg(const struct ieee80211_regdomain *regd,
1083 struct ieee80211_channel *chan,
1084 const struct ieee80211_reg_rule *reg_rule)
1086 const struct ieee80211_power_rule *power_rule;
1087 const struct ieee80211_freq_range *freq_range;
1088 char max_antenna_gain[32], bw[32];
1090 power_rule = ®_rule->power_rule;
1091 freq_range = ®_rule->freq_range;
1093 if (!power_rule->max_antenna_gain)
1094 snprintf(max_antenna_gain, sizeof(max_antenna_gain), "N/A");
1096 snprintf(max_antenna_gain, sizeof(max_antenna_gain), "%d",
1097 power_rule->max_antenna_gain);
1099 if (reg_rule->flags & NL80211_RRF_AUTO_BW)
1100 snprintf(bw, sizeof(bw), "%d KHz, %d KHz AUTO",
1101 freq_range->max_bandwidth_khz,
1102 reg_get_max_bandwidth(regd, reg_rule));
1104 snprintf(bw, sizeof(bw), "%d KHz",
1105 freq_range->max_bandwidth_khz);
1107 REG_DBG_PRINT("Updating information on frequency %d MHz with regulatory rule:\n",
1110 REG_DBG_PRINT("%d KHz - %d KHz @ %s), (%s mBi, %d mBm)\n",
1111 freq_range->start_freq_khz, freq_range->end_freq_khz,
1112 bw, max_antenna_gain,
1113 power_rule->max_eirp);
1116 static void chan_reg_rule_print_dbg(const struct ieee80211_regdomain *regd,
1117 struct ieee80211_channel *chan,
1118 const struct ieee80211_reg_rule *reg_rule)
1125 * Note that right now we assume the desired channel bandwidth
1126 * is always 20 MHz for each individual channel (HT40 uses 20 MHz
1127 * per channel, the primary and the extension channel).
1129 static void handle_channel(struct wiphy *wiphy,
1130 enum nl80211_reg_initiator initiator,
1131 struct ieee80211_channel *chan)
1133 u32 flags, bw_flags = 0;
1134 const struct ieee80211_reg_rule *reg_rule = NULL;
1135 const struct ieee80211_power_rule *power_rule = NULL;
1136 const struct ieee80211_freq_range *freq_range = NULL;
1137 struct wiphy *request_wiphy = NULL;
1138 struct regulatory_request *lr = get_last_request();
1139 const struct ieee80211_regdomain *regd;
1140 u32 max_bandwidth_khz;
1142 request_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx);
1144 flags = chan->orig_flags;
1146 reg_rule = freq_reg_info(wiphy, MHZ_TO_KHZ(chan->center_freq));
1147 if (IS_ERR(reg_rule)) {
1149 * We will disable all channels that do not match our
1150 * received regulatory rule unless the hint is coming
1151 * from a Country IE and the Country IE had no information
1152 * about a band. The IEEE 802.11 spec allows for an AP
1153 * to send only a subset of the regulatory rules allowed,
1154 * so an AP in the US that only supports 2.4 GHz may only send
1155 * a country IE with information for the 2.4 GHz band
1156 * while 5 GHz is still supported.
1158 if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE &&
1159 PTR_ERR(reg_rule) == -ERANGE)
1162 if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER &&
1163 request_wiphy && request_wiphy == wiphy &&
1164 request_wiphy->regulatory_flags & REGULATORY_STRICT_REG) {
1165 REG_DBG_PRINT("Disabling freq %d MHz for good\n",
1167 chan->orig_flags |= IEEE80211_CHAN_DISABLED;
1168 chan->flags = chan->orig_flags;
1170 REG_DBG_PRINT("Disabling freq %d MHz\n",
1172 chan->flags |= IEEE80211_CHAN_DISABLED;
1177 regd = reg_get_regdomain(wiphy);
1178 chan_reg_rule_print_dbg(regd, chan, reg_rule);
1180 power_rule = ®_rule->power_rule;
1181 freq_range = ®_rule->freq_range;
1183 max_bandwidth_khz = freq_range->max_bandwidth_khz;
1184 /* Check if auto calculation requested */
1185 if (reg_rule->flags & NL80211_RRF_AUTO_BW)
1186 max_bandwidth_khz = reg_get_max_bandwidth(regd, reg_rule);
1188 /* If we get a reg_rule we can assume that at least 5Mhz fit */
1189 if (!reg_does_bw_fit(freq_range, MHZ_TO_KHZ(chan->center_freq),
1191 bw_flags |= IEEE80211_CHAN_NO_10MHZ;
1192 if (!reg_does_bw_fit(freq_range, MHZ_TO_KHZ(chan->center_freq),
1194 bw_flags |= IEEE80211_CHAN_NO_20MHZ;
1196 if (max_bandwidth_khz < MHZ_TO_KHZ(10))
1197 bw_flags |= IEEE80211_CHAN_NO_10MHZ;
1198 if (max_bandwidth_khz < MHZ_TO_KHZ(20))
1199 bw_flags |= IEEE80211_CHAN_NO_20MHZ;
1200 if (max_bandwidth_khz < MHZ_TO_KHZ(40))
1201 bw_flags |= IEEE80211_CHAN_NO_HT40;
1202 if (max_bandwidth_khz < MHZ_TO_KHZ(80))
1203 bw_flags |= IEEE80211_CHAN_NO_80MHZ;
1204 if (max_bandwidth_khz < MHZ_TO_KHZ(160))
1205 bw_flags |= IEEE80211_CHAN_NO_160MHZ;
1207 if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER &&
1208 request_wiphy && request_wiphy == wiphy &&
1209 request_wiphy->regulatory_flags & REGULATORY_STRICT_REG) {
1211 * This guarantees the driver's requested regulatory domain
1212 * will always be used as a base for further regulatory
1215 chan->flags = chan->orig_flags =
1216 map_regdom_flags(reg_rule->flags) | bw_flags;
1217 chan->max_antenna_gain = chan->orig_mag =
1218 (int) MBI_TO_DBI(power_rule->max_antenna_gain);
1219 chan->max_reg_power = chan->max_power = chan->orig_mpwr =
1220 (int) MBM_TO_DBM(power_rule->max_eirp);
1222 if (chan->flags & IEEE80211_CHAN_RADAR) {
1223 chan->dfs_cac_ms = IEEE80211_DFS_MIN_CAC_TIME_MS;
1224 if (reg_rule->dfs_cac_ms)
1225 chan->dfs_cac_ms = reg_rule->dfs_cac_ms;
1231 chan->dfs_state = NL80211_DFS_USABLE;
1232 chan->dfs_state_entered = jiffies;
1234 chan->beacon_found = false;
1235 chan->flags = flags | bw_flags | map_regdom_flags(reg_rule->flags);
1236 chan->max_antenna_gain =
1237 min_t(int, chan->orig_mag,
1238 MBI_TO_DBI(power_rule->max_antenna_gain));
1239 chan->max_reg_power = (int) MBM_TO_DBM(power_rule->max_eirp);
1241 if (chan->flags & IEEE80211_CHAN_RADAR) {
1242 if (reg_rule->dfs_cac_ms)
1243 chan->dfs_cac_ms = reg_rule->dfs_cac_ms;
1245 chan->dfs_cac_ms = IEEE80211_DFS_MIN_CAC_TIME_MS;
1248 if (chan->orig_mpwr) {
1250 * Devices that use REGULATORY_COUNTRY_IE_FOLLOW_POWER
1251 * will always follow the passed country IE power settings.
1253 if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE &&
1254 wiphy->regulatory_flags & REGULATORY_COUNTRY_IE_FOLLOW_POWER)
1255 chan->max_power = chan->max_reg_power;
1257 chan->max_power = min(chan->orig_mpwr,
1258 chan->max_reg_power);
1260 chan->max_power = chan->max_reg_power;
1263 static void handle_band(struct wiphy *wiphy,
1264 enum nl80211_reg_initiator initiator,
1265 struct ieee80211_supported_band *sband)
1272 for (i = 0; i < sband->n_channels; i++)
1273 handle_channel(wiphy, initiator, &sband->channels[i]);
1276 static bool reg_request_cell_base(struct regulatory_request *request)
1278 if (request->initiator != NL80211_REGDOM_SET_BY_USER)
1280 return request->user_reg_hint_type == NL80211_USER_REG_HINT_CELL_BASE;
1283 bool reg_last_request_cell_base(void)
1285 return reg_request_cell_base(get_last_request());
1288 #ifdef CONFIG_CFG80211_REG_CELLULAR_HINTS
1289 /* Core specific check */
1290 static enum reg_request_treatment
1291 reg_ignore_cell_hint(struct regulatory_request *pending_request)
1293 struct regulatory_request *lr = get_last_request();
1295 if (!reg_num_devs_support_basehint)
1296 return REG_REQ_IGNORE;
1298 if (reg_request_cell_base(lr) &&
1299 !regdom_changes(pending_request->alpha2))
1300 return REG_REQ_ALREADY_SET;
1305 /* Device specific check */
1306 static bool reg_dev_ignore_cell_hint(struct wiphy *wiphy)
1308 return !(wiphy->features & NL80211_FEATURE_CELL_BASE_REG_HINTS);
1311 static int reg_ignore_cell_hint(struct regulatory_request *pending_request)
1313 return REG_REQ_IGNORE;
1316 static bool reg_dev_ignore_cell_hint(struct wiphy *wiphy)
1322 static bool wiphy_strict_alpha2_regd(struct wiphy *wiphy)
1324 if (wiphy->regulatory_flags & REGULATORY_STRICT_REG &&
1325 !(wiphy->regulatory_flags & REGULATORY_CUSTOM_REG))
1330 static bool ignore_reg_update(struct wiphy *wiphy,
1331 enum nl80211_reg_initiator initiator)
1333 struct regulatory_request *lr = get_last_request();
1335 if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED)
1339 REG_DBG_PRINT("Ignoring regulatory request set by %s "
1340 "since last_request is not set\n",
1341 reg_initiator_name(initiator));
1345 if (initiator == NL80211_REGDOM_SET_BY_CORE &&
1346 wiphy->regulatory_flags & REGULATORY_CUSTOM_REG) {
1347 REG_DBG_PRINT("Ignoring regulatory request set by %s "
1348 "since the driver uses its own custom "
1349 "regulatory domain\n",
1350 reg_initiator_name(initiator));
1355 * wiphy->regd will be set once the device has its own
1356 * desired regulatory domain set
1358 if (wiphy_strict_alpha2_regd(wiphy) && !wiphy->regd &&
1359 initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE &&
1360 !is_world_regdom(lr->alpha2)) {
1361 REG_DBG_PRINT("Ignoring regulatory request set by %s "
1362 "since the driver requires its own regulatory "
1363 "domain to be set first\n",
1364 reg_initiator_name(initiator));
1368 if (reg_request_cell_base(lr))
1369 return reg_dev_ignore_cell_hint(wiphy);
1374 static bool reg_is_world_roaming(struct wiphy *wiphy)
1376 const struct ieee80211_regdomain *cr = get_cfg80211_regdom();
1377 const struct ieee80211_regdomain *wr = get_wiphy_regdom(wiphy);
1378 struct regulatory_request *lr = get_last_request();
1380 if (is_world_regdom(cr->alpha2) || (wr && is_world_regdom(wr->alpha2)))
1383 if (lr && lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE &&
1384 wiphy->regulatory_flags & REGULATORY_CUSTOM_REG)
1390 static void handle_reg_beacon(struct wiphy *wiphy, unsigned int chan_idx,
1391 struct reg_beacon *reg_beacon)
1393 struct ieee80211_supported_band *sband;
1394 struct ieee80211_channel *chan;
1395 bool channel_changed = false;
1396 struct ieee80211_channel chan_before;
1398 sband = wiphy->bands[reg_beacon->chan.band];
1399 chan = &sband->channels[chan_idx];
1401 if (likely(chan->center_freq != reg_beacon->chan.center_freq))
1404 if (chan->beacon_found)
1407 chan->beacon_found = true;
1409 if (!reg_is_world_roaming(wiphy))
1412 if (wiphy->regulatory_flags & REGULATORY_DISABLE_BEACON_HINTS)
1415 chan_before.center_freq = chan->center_freq;
1416 chan_before.flags = chan->flags;
1418 if (chan->flags & IEEE80211_CHAN_NO_IR) {
1419 chan->flags &= ~IEEE80211_CHAN_NO_IR;
1420 channel_changed = true;
1423 if (channel_changed)
1424 nl80211_send_beacon_hint_event(wiphy, &chan_before, chan);
1428 * Called when a scan on a wiphy finds a beacon on
1431 static void wiphy_update_new_beacon(struct wiphy *wiphy,
1432 struct reg_beacon *reg_beacon)
1435 struct ieee80211_supported_band *sband;
1437 if (!wiphy->bands[reg_beacon->chan.band])
1440 sband = wiphy->bands[reg_beacon->chan.band];
1442 for (i = 0; i < sband->n_channels; i++)
1443 handle_reg_beacon(wiphy, i, reg_beacon);
1447 * Called upon reg changes or a new wiphy is added
1449 static void wiphy_update_beacon_reg(struct wiphy *wiphy)
1452 struct ieee80211_supported_band *sband;
1453 struct reg_beacon *reg_beacon;
1455 list_for_each_entry(reg_beacon, ®_beacon_list, list) {
1456 if (!wiphy->bands[reg_beacon->chan.band])
1458 sband = wiphy->bands[reg_beacon->chan.band];
1459 for (i = 0; i < sband->n_channels; i++)
1460 handle_reg_beacon(wiphy, i, reg_beacon);
1464 /* Reap the advantages of previously found beacons */
1465 static void reg_process_beacons(struct wiphy *wiphy)
1468 * Means we are just firing up cfg80211, so no beacons would
1469 * have been processed yet.
1473 wiphy_update_beacon_reg(wiphy);
1476 static bool is_ht40_allowed(struct ieee80211_channel *chan)
1480 if (chan->flags & IEEE80211_CHAN_DISABLED)
1482 /* This would happen when regulatory rules disallow HT40 completely */
1483 if ((chan->flags & IEEE80211_CHAN_NO_HT40) == IEEE80211_CHAN_NO_HT40)
1488 static void reg_process_ht_flags_channel(struct wiphy *wiphy,
1489 struct ieee80211_channel *channel)
1491 struct ieee80211_supported_band *sband = wiphy->bands[channel->band];
1492 struct ieee80211_channel *channel_before = NULL, *channel_after = NULL;
1495 if (!is_ht40_allowed(channel)) {
1496 channel->flags |= IEEE80211_CHAN_NO_HT40;
1501 * We need to ensure the extension channels exist to
1502 * be able to use HT40- or HT40+, this finds them (or not)
1504 for (i = 0; i < sband->n_channels; i++) {
1505 struct ieee80211_channel *c = &sband->channels[i];
1507 if (c->center_freq == (channel->center_freq - 20))
1509 if (c->center_freq == (channel->center_freq + 20))
1514 * Please note that this assumes target bandwidth is 20 MHz,
1515 * if that ever changes we also need to change the below logic
1516 * to include that as well.
1518 if (!is_ht40_allowed(channel_before))
1519 channel->flags |= IEEE80211_CHAN_NO_HT40MINUS;
1521 channel->flags &= ~IEEE80211_CHAN_NO_HT40MINUS;
1523 if (!is_ht40_allowed(channel_after))
1524 channel->flags |= IEEE80211_CHAN_NO_HT40PLUS;
1526 channel->flags &= ~IEEE80211_CHAN_NO_HT40PLUS;
1529 static void reg_process_ht_flags_band(struct wiphy *wiphy,
1530 struct ieee80211_supported_band *sband)
1537 for (i = 0; i < sband->n_channels; i++)
1538 reg_process_ht_flags_channel(wiphy, &sband->channels[i]);
1541 static void reg_process_ht_flags(struct wiphy *wiphy)
1543 enum ieee80211_band band;
1548 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
1549 reg_process_ht_flags_band(wiphy, wiphy->bands[band]);
1552 static void reg_call_notifier(struct wiphy *wiphy,
1553 struct regulatory_request *request)
1555 if (wiphy->reg_notifier)
1556 wiphy->reg_notifier(wiphy, request);
1559 static bool reg_wdev_chan_valid(struct wiphy *wiphy, struct wireless_dev *wdev)
1561 struct cfg80211_chan_def chandef;
1562 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
1563 enum nl80211_iftype iftype;
1566 iftype = wdev->iftype;
1568 /* make sure the interface is active */
1569 if (!wdev->netdev || !netif_running(wdev->netdev))
1570 goto wdev_inactive_unlock;
1573 case NL80211_IFTYPE_AP:
1574 case NL80211_IFTYPE_P2P_GO:
1575 if (!wdev->beacon_interval)
1576 goto wdev_inactive_unlock;
1577 chandef = wdev->chandef;
1579 case NL80211_IFTYPE_ADHOC:
1580 if (!wdev->ssid_len)
1581 goto wdev_inactive_unlock;
1582 chandef = wdev->chandef;
1584 case NL80211_IFTYPE_STATION:
1585 case NL80211_IFTYPE_P2P_CLIENT:
1586 if (!wdev->current_bss ||
1587 !wdev->current_bss->pub.channel)
1588 goto wdev_inactive_unlock;
1590 if (!rdev->ops->get_channel ||
1591 rdev_get_channel(rdev, wdev, &chandef))
1592 cfg80211_chandef_create(&chandef,
1593 wdev->current_bss->pub.channel,
1594 NL80211_CHAN_NO_HT);
1596 case NL80211_IFTYPE_MONITOR:
1597 case NL80211_IFTYPE_AP_VLAN:
1598 case NL80211_IFTYPE_P2P_DEVICE:
1599 /* no enforcement required */
1602 /* others not implemented for now */
1610 case NL80211_IFTYPE_AP:
1611 case NL80211_IFTYPE_P2P_GO:
1612 case NL80211_IFTYPE_ADHOC:
1613 return cfg80211_reg_can_beacon_relax(wiphy, &chandef, iftype);
1614 case NL80211_IFTYPE_STATION:
1615 case NL80211_IFTYPE_P2P_CLIENT:
1616 return cfg80211_chandef_usable(wiphy, &chandef,
1617 IEEE80211_CHAN_DISABLED);
1624 wdev_inactive_unlock:
1629 static void reg_leave_invalid_chans(struct wiphy *wiphy)
1631 struct wireless_dev *wdev;
1632 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
1636 list_for_each_entry(wdev, &rdev->wdev_list, list)
1637 if (!reg_wdev_chan_valid(wiphy, wdev))
1638 cfg80211_leave(rdev, wdev);
1641 static void reg_check_chans_work(struct work_struct *work)
1643 struct cfg80211_registered_device *rdev;
1645 REG_DBG_PRINT("Verifying active interfaces after reg change\n");
1648 list_for_each_entry(rdev, &cfg80211_rdev_list, list)
1649 if (!(rdev->wiphy.regulatory_flags &
1650 REGULATORY_IGNORE_STALE_KICKOFF))
1651 reg_leave_invalid_chans(&rdev->wiphy);
1656 static void reg_check_channels(void)
1659 * Give usermode a chance to do something nicer (move to another
1660 * channel, orderly disconnection), before forcing a disconnection.
1662 mod_delayed_work(system_power_efficient_wq,
1664 msecs_to_jiffies(REG_ENFORCE_GRACE_MS));
1667 static void wiphy_update_regulatory(struct wiphy *wiphy,
1668 enum nl80211_reg_initiator initiator)
1670 enum ieee80211_band band;
1671 struct regulatory_request *lr = get_last_request();
1673 if (ignore_reg_update(wiphy, initiator)) {
1675 * Regulatory updates set by CORE are ignored for custom
1676 * regulatory cards. Let us notify the changes to the driver,
1677 * as some drivers used this to restore its orig_* reg domain.
1679 if (initiator == NL80211_REGDOM_SET_BY_CORE &&
1680 wiphy->regulatory_flags & REGULATORY_CUSTOM_REG)
1681 reg_call_notifier(wiphy, lr);
1685 lr->dfs_region = get_cfg80211_regdom()->dfs_region;
1687 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
1688 handle_band(wiphy, initiator, wiphy->bands[band]);
1690 reg_process_beacons(wiphy);
1691 reg_process_ht_flags(wiphy);
1692 reg_call_notifier(wiphy, lr);
1695 static void update_all_wiphy_regulatory(enum nl80211_reg_initiator initiator)
1697 struct cfg80211_registered_device *rdev;
1698 struct wiphy *wiphy;
1702 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
1703 wiphy = &rdev->wiphy;
1704 wiphy_update_regulatory(wiphy, initiator);
1707 reg_check_channels();
1710 static void handle_channel_custom(struct wiphy *wiphy,
1711 struct ieee80211_channel *chan,
1712 const struct ieee80211_regdomain *regd)
1715 const struct ieee80211_reg_rule *reg_rule = NULL;
1716 const struct ieee80211_power_rule *power_rule = NULL;
1717 const struct ieee80211_freq_range *freq_range = NULL;
1718 u32 max_bandwidth_khz;
1721 for (bw = MHZ_TO_KHZ(20); bw >= MHZ_TO_KHZ(5); bw = bw / 2) {
1722 reg_rule = freq_reg_info_regd(wiphy,
1723 MHZ_TO_KHZ(chan->center_freq),
1725 if (!IS_ERR(reg_rule))
1729 if (IS_ERR(reg_rule)) {
1730 REG_DBG_PRINT("Disabling freq %d MHz as custom regd has no rule that fits it\n",
1732 if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) {
1733 chan->flags |= IEEE80211_CHAN_DISABLED;
1735 chan->orig_flags |= IEEE80211_CHAN_DISABLED;
1736 chan->flags = chan->orig_flags;
1741 chan_reg_rule_print_dbg(regd, chan, reg_rule);
1743 power_rule = ®_rule->power_rule;
1744 freq_range = ®_rule->freq_range;
1746 max_bandwidth_khz = freq_range->max_bandwidth_khz;
1747 /* Check if auto calculation requested */
1748 if (reg_rule->flags & NL80211_RRF_AUTO_BW)
1749 max_bandwidth_khz = reg_get_max_bandwidth(regd, reg_rule);
1751 /* If we get a reg_rule we can assume that at least 5Mhz fit */
1752 if (!reg_does_bw_fit(freq_range, MHZ_TO_KHZ(chan->center_freq),
1754 bw_flags |= IEEE80211_CHAN_NO_10MHZ;
1755 if (!reg_does_bw_fit(freq_range, MHZ_TO_KHZ(chan->center_freq),
1757 bw_flags |= IEEE80211_CHAN_NO_20MHZ;
1759 if (max_bandwidth_khz < MHZ_TO_KHZ(10))
1760 bw_flags |= IEEE80211_CHAN_NO_10MHZ;
1761 if (max_bandwidth_khz < MHZ_TO_KHZ(20))
1762 bw_flags |= IEEE80211_CHAN_NO_20MHZ;
1763 if (max_bandwidth_khz < MHZ_TO_KHZ(40))
1764 bw_flags |= IEEE80211_CHAN_NO_HT40;
1765 if (max_bandwidth_khz < MHZ_TO_KHZ(80))
1766 bw_flags |= IEEE80211_CHAN_NO_80MHZ;
1767 if (max_bandwidth_khz < MHZ_TO_KHZ(160))
1768 bw_flags |= IEEE80211_CHAN_NO_160MHZ;
1770 chan->dfs_state_entered = jiffies;
1771 chan->dfs_state = NL80211_DFS_USABLE;
1773 chan->beacon_found = false;
1775 if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED)
1776 chan->flags = chan->orig_flags | bw_flags |
1777 map_regdom_flags(reg_rule->flags);
1779 chan->flags |= map_regdom_flags(reg_rule->flags) | bw_flags;
1781 chan->max_antenna_gain = (int) MBI_TO_DBI(power_rule->max_antenna_gain);
1782 chan->max_reg_power = chan->max_power =
1783 (int) MBM_TO_DBM(power_rule->max_eirp);
1785 if (chan->flags & IEEE80211_CHAN_RADAR) {
1786 if (reg_rule->dfs_cac_ms)
1787 chan->dfs_cac_ms = reg_rule->dfs_cac_ms;
1789 chan->dfs_cac_ms = IEEE80211_DFS_MIN_CAC_TIME_MS;
1792 chan->max_power = chan->max_reg_power;
1795 static void handle_band_custom(struct wiphy *wiphy,
1796 struct ieee80211_supported_band *sband,
1797 const struct ieee80211_regdomain *regd)
1804 for (i = 0; i < sband->n_channels; i++)
1805 handle_channel_custom(wiphy, &sband->channels[i], regd);
1808 /* Used by drivers prior to wiphy registration */
1809 void wiphy_apply_custom_regulatory(struct wiphy *wiphy,
1810 const struct ieee80211_regdomain *regd)
1812 enum ieee80211_band band;
1813 unsigned int bands_set = 0;
1815 WARN(!(wiphy->regulatory_flags & REGULATORY_CUSTOM_REG),
1816 "wiphy should have REGULATORY_CUSTOM_REG\n");
1817 wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG;
1819 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
1820 if (!wiphy->bands[band])
1822 handle_band_custom(wiphy, wiphy->bands[band], regd);
1827 * no point in calling this if it won't have any effect
1828 * on your device's supported bands.
1830 WARN_ON(!bands_set);
1832 EXPORT_SYMBOL(wiphy_apply_custom_regulatory);
1834 static void reg_set_request_processed(void)
1836 bool need_more_processing = false;
1837 struct regulatory_request *lr = get_last_request();
1839 lr->processed = true;
1841 spin_lock(®_requests_lock);
1842 if (!list_empty(®_requests_list))
1843 need_more_processing = true;
1844 spin_unlock(®_requests_lock);
1846 cancel_delayed_work(®_timeout);
1848 if (need_more_processing)
1849 schedule_work(®_work);
1853 * reg_process_hint_core - process core regulatory requests
1854 * @pending_request: a pending core regulatory request
1856 * The wireless subsystem can use this function to process
1857 * a regulatory request issued by the regulatory core.
1859 * Returns one of the different reg request treatment values.
1861 static enum reg_request_treatment
1862 reg_process_hint_core(struct regulatory_request *core_request)
1865 core_request->intersect = false;
1866 core_request->processed = false;
1868 reg_update_last_request(core_request);
1870 return reg_call_crda(core_request);
1873 static enum reg_request_treatment
1874 __reg_process_hint_user(struct regulatory_request *user_request)
1876 struct regulatory_request *lr = get_last_request();
1878 if (reg_request_cell_base(user_request))
1879 return reg_ignore_cell_hint(user_request);
1881 if (reg_request_cell_base(lr))
1882 return REG_REQ_IGNORE;
1884 if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE)
1885 return REG_REQ_INTERSECT;
1887 * If the user knows better the user should set the regdom
1888 * to their country before the IE is picked up
1890 if (lr->initiator == NL80211_REGDOM_SET_BY_USER &&
1892 return REG_REQ_IGNORE;
1894 * Process user requests only after previous user/driver/core
1895 * requests have been processed
1897 if ((lr->initiator == NL80211_REGDOM_SET_BY_CORE ||
1898 lr->initiator == NL80211_REGDOM_SET_BY_DRIVER ||
1899 lr->initiator == NL80211_REGDOM_SET_BY_USER) &&
1900 regdom_changes(lr->alpha2))
1901 return REG_REQ_IGNORE;
1903 if (!regdom_changes(user_request->alpha2))
1904 return REG_REQ_ALREADY_SET;
1910 * reg_process_hint_user - process user regulatory requests
1911 * @user_request: a pending user regulatory request
1913 * The wireless subsystem can use this function to process
1914 * a regulatory request initiated by userspace.
1916 * Returns one of the different reg request treatment values.
1918 static enum reg_request_treatment
1919 reg_process_hint_user(struct regulatory_request *user_request)
1921 enum reg_request_treatment treatment;
1923 treatment = __reg_process_hint_user(user_request);
1924 if (treatment == REG_REQ_IGNORE ||
1925 treatment == REG_REQ_ALREADY_SET) {
1926 reg_free_request(user_request);
1930 user_request->intersect = treatment == REG_REQ_INTERSECT;
1931 user_request->processed = false;
1933 reg_update_last_request(user_request);
1935 user_alpha2[0] = user_request->alpha2[0];
1936 user_alpha2[1] = user_request->alpha2[1];
1938 return reg_call_crda(user_request);
1941 static enum reg_request_treatment
1942 __reg_process_hint_driver(struct regulatory_request *driver_request)
1944 struct regulatory_request *lr = get_last_request();
1946 if (lr->initiator == NL80211_REGDOM_SET_BY_CORE) {
1947 if (regdom_changes(driver_request->alpha2))
1949 return REG_REQ_ALREADY_SET;
1953 * This would happen if you unplug and plug your card
1954 * back in or if you add a new device for which the previously
1955 * loaded card also agrees on the regulatory domain.
1957 if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER &&
1958 !regdom_changes(driver_request->alpha2))
1959 return REG_REQ_ALREADY_SET;
1961 return REG_REQ_INTERSECT;
1965 * reg_process_hint_driver - process driver regulatory requests
1966 * @driver_request: a pending driver regulatory request
1968 * The wireless subsystem can use this function to process
1969 * a regulatory request issued by an 802.11 driver.
1971 * Returns one of the different reg request treatment values.
1973 static enum reg_request_treatment
1974 reg_process_hint_driver(struct wiphy *wiphy,
1975 struct regulatory_request *driver_request)
1977 const struct ieee80211_regdomain *regd, *tmp;
1978 enum reg_request_treatment treatment;
1980 treatment = __reg_process_hint_driver(driver_request);
1982 switch (treatment) {
1985 case REG_REQ_IGNORE:
1986 reg_free_request(driver_request);
1988 case REG_REQ_INTERSECT:
1990 case REG_REQ_ALREADY_SET:
1991 regd = reg_copy_regd(get_cfg80211_regdom());
1993 reg_free_request(driver_request);
1994 return REG_REQ_IGNORE;
1997 tmp = get_wiphy_regdom(wiphy);
1998 rcu_assign_pointer(wiphy->regd, regd);
1999 rcu_free_regdom(tmp);
2003 driver_request->intersect = treatment == REG_REQ_INTERSECT;
2004 driver_request->processed = false;
2006 reg_update_last_request(driver_request);
2009 * Since CRDA will not be called in this case as we already
2010 * have applied the requested regulatory domain before we just
2011 * inform userspace we have processed the request
2013 if (treatment == REG_REQ_ALREADY_SET) {
2014 nl80211_send_reg_change_event(driver_request);
2015 reg_set_request_processed();
2019 return reg_call_crda(driver_request);
2022 static enum reg_request_treatment
2023 __reg_process_hint_country_ie(struct wiphy *wiphy,
2024 struct regulatory_request *country_ie_request)
2026 struct wiphy *last_wiphy = NULL;
2027 struct regulatory_request *lr = get_last_request();
2029 if (reg_request_cell_base(lr)) {
2030 /* Trust a Cell base station over the AP's country IE */
2031 if (regdom_changes(country_ie_request->alpha2))
2032 return REG_REQ_IGNORE;
2033 return REG_REQ_ALREADY_SET;
2035 if (wiphy->regulatory_flags & REGULATORY_COUNTRY_IE_IGNORE)
2036 return REG_REQ_IGNORE;
2039 if (unlikely(!is_an_alpha2(country_ie_request->alpha2)))
2042 if (lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE)
2045 last_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx);
2047 if (last_wiphy != wiphy) {
2049 * Two cards with two APs claiming different
2050 * Country IE alpha2s. We could
2051 * intersect them, but that seems unlikely
2052 * to be correct. Reject second one for now.
2054 if (regdom_changes(country_ie_request->alpha2))
2055 return REG_REQ_IGNORE;
2056 return REG_REQ_ALREADY_SET;
2059 if (regdom_changes(country_ie_request->alpha2))
2061 return REG_REQ_ALREADY_SET;
2065 * reg_process_hint_country_ie - process regulatory requests from country IEs
2066 * @country_ie_request: a regulatory request from a country IE
2068 * The wireless subsystem can use this function to process
2069 * a regulatory request issued by a country Information Element.
2071 * Returns one of the different reg request treatment values.
2073 static enum reg_request_treatment
2074 reg_process_hint_country_ie(struct wiphy *wiphy,
2075 struct regulatory_request *country_ie_request)
2077 enum reg_request_treatment treatment;
2079 treatment = __reg_process_hint_country_ie(wiphy, country_ie_request);
2081 switch (treatment) {
2084 case REG_REQ_IGNORE:
2086 case REG_REQ_ALREADY_SET:
2087 reg_free_request(country_ie_request);
2089 case REG_REQ_INTERSECT:
2090 reg_free_request(country_ie_request);
2092 * This doesn't happen yet, not sure we
2093 * ever want to support it for this case.
2095 WARN_ONCE(1, "Unexpected intersection for country IEs");
2096 return REG_REQ_IGNORE;
2099 country_ie_request->intersect = false;
2100 country_ie_request->processed = false;
2102 reg_update_last_request(country_ie_request);
2104 return reg_call_crda(country_ie_request);
2107 /* This processes *all* regulatory hints */
2108 static void reg_process_hint(struct regulatory_request *reg_request)
2110 struct wiphy *wiphy = NULL;
2111 enum reg_request_treatment treatment;
2113 if (reg_request->wiphy_idx != WIPHY_IDX_INVALID)
2114 wiphy = wiphy_idx_to_wiphy(reg_request->wiphy_idx);
2116 switch (reg_request->initiator) {
2117 case NL80211_REGDOM_SET_BY_CORE:
2118 reg_process_hint_core(reg_request);
2120 case NL80211_REGDOM_SET_BY_USER:
2121 reg_process_hint_user(reg_request);
2123 case NL80211_REGDOM_SET_BY_DRIVER:
2126 treatment = reg_process_hint_driver(wiphy, reg_request);
2128 case NL80211_REGDOM_SET_BY_COUNTRY_IE:
2131 treatment = reg_process_hint_country_ie(wiphy, reg_request);
2134 WARN(1, "invalid initiator %d\n", reg_request->initiator);
2138 /* This is required so that the orig_* parameters are saved.
2139 * NOTE: treatment must be set for any case that reaches here!
2141 if (treatment == REG_REQ_ALREADY_SET && wiphy &&
2142 wiphy->regulatory_flags & REGULATORY_STRICT_REG) {
2143 wiphy_update_regulatory(wiphy, reg_request->initiator);
2144 reg_check_channels();
2150 reg_free_request(reg_request);
2153 static bool reg_only_self_managed_wiphys(void)
2155 struct cfg80211_registered_device *rdev;
2156 struct wiphy *wiphy;
2157 bool self_managed_found = false;
2161 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
2162 wiphy = &rdev->wiphy;
2163 if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED)
2164 self_managed_found = true;
2169 /* make sure at least one self-managed wiphy exists */
2170 return self_managed_found;
2174 * Processes regulatory hints, this is all the NL80211_REGDOM_SET_BY_*
2175 * Regulatory hints come on a first come first serve basis and we
2176 * must process each one atomically.
2178 static void reg_process_pending_hints(void)
2180 struct regulatory_request *reg_request, *lr;
2182 lr = get_last_request();
2184 /* When last_request->processed becomes true this will be rescheduled */
2185 if (lr && !lr->processed) {
2186 reg_process_hint(lr);
2190 spin_lock(®_requests_lock);
2192 if (list_empty(®_requests_list)) {
2193 spin_unlock(®_requests_lock);
2197 reg_request = list_first_entry(®_requests_list,
2198 struct regulatory_request,
2200 list_del_init(®_request->list);
2202 spin_unlock(®_requests_lock);
2204 if (reg_only_self_managed_wiphys()) {
2205 reg_free_request(reg_request);
2209 reg_process_hint(reg_request);
2211 lr = get_last_request();
2213 spin_lock(®_requests_lock);
2214 if (!list_empty(®_requests_list) && lr && lr->processed)
2215 schedule_work(®_work);
2216 spin_unlock(®_requests_lock);
2219 /* Processes beacon hints -- this has nothing to do with country IEs */
2220 static void reg_process_pending_beacon_hints(void)
2222 struct cfg80211_registered_device *rdev;
2223 struct reg_beacon *pending_beacon, *tmp;
2225 /* This goes through the _pending_ beacon list */
2226 spin_lock_bh(®_pending_beacons_lock);
2228 list_for_each_entry_safe(pending_beacon, tmp,
2229 ®_pending_beacons, list) {
2230 list_del_init(&pending_beacon->list);
2232 /* Applies the beacon hint to current wiphys */
2233 list_for_each_entry(rdev, &cfg80211_rdev_list, list)
2234 wiphy_update_new_beacon(&rdev->wiphy, pending_beacon);
2236 /* Remembers the beacon hint for new wiphys or reg changes */
2237 list_add_tail(&pending_beacon->list, ®_beacon_list);
2240 spin_unlock_bh(®_pending_beacons_lock);
2243 static void reg_process_self_managed_hints(void)
2245 struct cfg80211_registered_device *rdev;
2246 struct wiphy *wiphy;
2247 const struct ieee80211_regdomain *tmp;
2248 const struct ieee80211_regdomain *regd;
2249 enum ieee80211_band band;
2250 struct regulatory_request request = {};
2252 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
2253 wiphy = &rdev->wiphy;
2255 spin_lock(®_requests_lock);
2256 regd = rdev->requested_regd;
2257 rdev->requested_regd = NULL;
2258 spin_unlock(®_requests_lock);
2263 tmp = get_wiphy_regdom(wiphy);
2264 rcu_assign_pointer(wiphy->regd, regd);
2265 rcu_free_regdom(tmp);
2267 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
2268 handle_band_custom(wiphy, wiphy->bands[band], regd);
2270 reg_process_ht_flags(wiphy);
2272 request.wiphy_idx = get_wiphy_idx(wiphy);
2273 request.alpha2[0] = regd->alpha2[0];
2274 request.alpha2[1] = regd->alpha2[1];
2275 request.initiator = NL80211_REGDOM_SET_BY_DRIVER;
2277 nl80211_send_wiphy_reg_change_event(&request);
2280 reg_check_channels();
2283 static void reg_todo(struct work_struct *work)
2286 reg_process_pending_hints();
2287 reg_process_pending_beacon_hints();
2288 reg_process_self_managed_hints();
2292 static void queue_regulatory_request(struct regulatory_request *request)
2294 request->alpha2[0] = toupper(request->alpha2[0]);
2295 request->alpha2[1] = toupper(request->alpha2[1]);
2297 spin_lock(®_requests_lock);
2298 list_add_tail(&request->list, ®_requests_list);
2299 spin_unlock(®_requests_lock);
2301 schedule_work(®_work);
2305 * Core regulatory hint -- happens during cfg80211_init()
2306 * and when we restore regulatory settings.
2308 static int regulatory_hint_core(const char *alpha2)
2310 struct regulatory_request *request;
2312 request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL);
2316 request->alpha2[0] = alpha2[0];
2317 request->alpha2[1] = alpha2[1];
2318 request->initiator = NL80211_REGDOM_SET_BY_CORE;
2320 queue_regulatory_request(request);
2326 int regulatory_hint_user(const char *alpha2,
2327 enum nl80211_user_reg_hint_type user_reg_hint_type)
2329 struct regulatory_request *request;
2331 if (WARN_ON(!alpha2))
2334 request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL);
2338 request->wiphy_idx = WIPHY_IDX_INVALID;
2339 request->alpha2[0] = alpha2[0];
2340 request->alpha2[1] = alpha2[1];
2341 request->initiator = NL80211_REGDOM_SET_BY_USER;
2342 request->user_reg_hint_type = user_reg_hint_type;
2344 /* Allow calling CRDA again */
2345 reg_crda_timeouts = 0;
2347 queue_regulatory_request(request);
2352 int regulatory_hint_indoor(bool is_indoor, u32 portid)
2354 spin_lock(®_indoor_lock);
2356 /* It is possible that more than one user space process is trying to
2357 * configure the indoor setting. To handle such cases, clear the indoor
2358 * setting in case that some process does not think that the device
2359 * is operating in an indoor environment. In addition, if a user space
2360 * process indicates that it is controlling the indoor setting, save its
2361 * portid, i.e., make it the owner.
2363 reg_is_indoor = is_indoor;
2364 if (reg_is_indoor) {
2365 if (!reg_is_indoor_portid)
2366 reg_is_indoor_portid = portid;
2368 reg_is_indoor_portid = 0;
2371 spin_unlock(®_indoor_lock);
2374 reg_check_channels();
2379 void regulatory_netlink_notify(u32 portid)
2381 spin_lock(®_indoor_lock);
2383 if (reg_is_indoor_portid != portid) {
2384 spin_unlock(®_indoor_lock);
2388 reg_is_indoor = false;
2389 reg_is_indoor_portid = 0;
2391 spin_unlock(®_indoor_lock);
2393 reg_check_channels();
2397 int regulatory_hint(struct wiphy *wiphy, const char *alpha2)
2399 struct regulatory_request *request;
2401 if (WARN_ON(!alpha2 || !wiphy))
2404 wiphy->regulatory_flags &= ~REGULATORY_CUSTOM_REG;
2406 request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL);
2410 request->wiphy_idx = get_wiphy_idx(wiphy);
2412 request->alpha2[0] = alpha2[0];
2413 request->alpha2[1] = alpha2[1];
2414 request->initiator = NL80211_REGDOM_SET_BY_DRIVER;
2416 /* Allow calling CRDA again */
2417 reg_crda_timeouts = 0;
2419 queue_regulatory_request(request);
2423 EXPORT_SYMBOL(regulatory_hint);
2425 void regulatory_hint_country_ie(struct wiphy *wiphy, enum ieee80211_band band,
2426 const u8 *country_ie, u8 country_ie_len)
2429 enum environment_cap env = ENVIRON_ANY;
2430 struct regulatory_request *request = NULL, *lr;
2432 /* IE len must be evenly divisible by 2 */
2433 if (country_ie_len & 0x01)
2436 if (country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
2439 request = kzalloc(sizeof(*request), GFP_KERNEL);
2443 alpha2[0] = country_ie[0];
2444 alpha2[1] = country_ie[1];
2446 if (country_ie[2] == 'I')
2447 env = ENVIRON_INDOOR;
2448 else if (country_ie[2] == 'O')
2449 env = ENVIRON_OUTDOOR;
2452 lr = get_last_request();
2458 * We will run this only upon a successful connection on cfg80211.
2459 * We leave conflict resolution to the workqueue, where can hold
2462 if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE &&
2463 lr->wiphy_idx != WIPHY_IDX_INVALID)
2466 request->wiphy_idx = get_wiphy_idx(wiphy);
2467 request->alpha2[0] = alpha2[0];
2468 request->alpha2[1] = alpha2[1];
2469 request->initiator = NL80211_REGDOM_SET_BY_COUNTRY_IE;
2470 request->country_ie_env = env;
2472 /* Allow calling CRDA again */
2473 reg_crda_timeouts = 0;
2475 queue_regulatory_request(request);
2482 static void restore_alpha2(char *alpha2, bool reset_user)
2484 /* indicates there is no alpha2 to consider for restoration */
2488 /* The user setting has precedence over the module parameter */
2489 if (is_user_regdom_saved()) {
2490 /* Unless we're asked to ignore it and reset it */
2492 REG_DBG_PRINT("Restoring regulatory settings including user preference\n");
2493 user_alpha2[0] = '9';
2494 user_alpha2[1] = '7';
2497 * If we're ignoring user settings, we still need to
2498 * check the module parameter to ensure we put things
2499 * back as they were for a full restore.
2501 if (!is_world_regdom(ieee80211_regdom)) {
2502 REG_DBG_PRINT("Keeping preference on module parameter ieee80211_regdom: %c%c\n",
2503 ieee80211_regdom[0], ieee80211_regdom[1]);
2504 alpha2[0] = ieee80211_regdom[0];
2505 alpha2[1] = ieee80211_regdom[1];
2508 REG_DBG_PRINT("Restoring regulatory settings while preserving user preference for: %c%c\n",
2509 user_alpha2[0], user_alpha2[1]);
2510 alpha2[0] = user_alpha2[0];
2511 alpha2[1] = user_alpha2[1];
2513 } else if (!is_world_regdom(ieee80211_regdom)) {
2514 REG_DBG_PRINT("Keeping preference on module parameter ieee80211_regdom: %c%c\n",
2515 ieee80211_regdom[0], ieee80211_regdom[1]);
2516 alpha2[0] = ieee80211_regdom[0];
2517 alpha2[1] = ieee80211_regdom[1];
2519 REG_DBG_PRINT("Restoring regulatory settings\n");
2522 static void restore_custom_reg_settings(struct wiphy *wiphy)
2524 struct ieee80211_supported_band *sband;
2525 enum ieee80211_band band;
2526 struct ieee80211_channel *chan;
2529 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
2530 sband = wiphy->bands[band];
2533 for (i = 0; i < sband->n_channels; i++) {
2534 chan = &sband->channels[i];
2535 chan->flags = chan->orig_flags;
2536 chan->max_antenna_gain = chan->orig_mag;
2537 chan->max_power = chan->orig_mpwr;
2538 chan->beacon_found = false;
2544 * Restoring regulatory settings involves ingoring any
2545 * possibly stale country IE information and user regulatory
2546 * settings if so desired, this includes any beacon hints
2547 * learned as we could have traveled outside to another country
2548 * after disconnection. To restore regulatory settings we do
2549 * exactly what we did at bootup:
2551 * - send a core regulatory hint
2552 * - send a user regulatory hint if applicable
2554 * Device drivers that send a regulatory hint for a specific country
2555 * keep their own regulatory domain on wiphy->regd so that does does
2556 * not need to be remembered.
2558 static void restore_regulatory_settings(bool reset_user)
2561 char world_alpha2[2];
2562 struct reg_beacon *reg_beacon, *btmp;
2563 LIST_HEAD(tmp_reg_req_list);
2564 struct cfg80211_registered_device *rdev;
2569 * Clear the indoor setting in case that it is not controlled by user
2570 * space, as otherwise there is no guarantee that the device is still
2571 * operating in an indoor environment.
2573 spin_lock(®_indoor_lock);
2574 if (reg_is_indoor && !reg_is_indoor_portid) {
2575 reg_is_indoor = false;
2576 reg_check_channels();
2578 spin_unlock(®_indoor_lock);
2580 reset_regdomains(true, &world_regdom);
2581 restore_alpha2(alpha2, reset_user);
2584 * If there's any pending requests we simply
2585 * stash them to a temporary pending queue and
2586 * add then after we've restored regulatory
2589 spin_lock(®_requests_lock);
2590 list_splice_tail_init(®_requests_list, &tmp_reg_req_list);
2591 spin_unlock(®_requests_lock);
2593 /* Clear beacon hints */
2594 spin_lock_bh(®_pending_beacons_lock);
2595 list_for_each_entry_safe(reg_beacon, btmp, ®_pending_beacons, list) {
2596 list_del(®_beacon->list);
2599 spin_unlock_bh(®_pending_beacons_lock);
2601 list_for_each_entry_safe(reg_beacon, btmp, ®_beacon_list, list) {
2602 list_del(®_beacon->list);
2606 /* First restore to the basic regulatory settings */
2607 world_alpha2[0] = cfg80211_world_regdom->alpha2[0];
2608 world_alpha2[1] = cfg80211_world_regdom->alpha2[1];
2610 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
2611 if (rdev->wiphy.regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED)
2613 if (rdev->wiphy.regulatory_flags & REGULATORY_CUSTOM_REG)
2614 restore_custom_reg_settings(&rdev->wiphy);
2617 regulatory_hint_core(world_alpha2);
2620 * This restores the ieee80211_regdom module parameter
2621 * preference or the last user requested regulatory
2622 * settings, user regulatory settings takes precedence.
2624 if (is_an_alpha2(alpha2))
2625 regulatory_hint_user(alpha2, NL80211_USER_REG_HINT_USER);
2627 spin_lock(®_requests_lock);
2628 list_splice_tail_init(&tmp_reg_req_list, ®_requests_list);
2629 spin_unlock(®_requests_lock);
2631 REG_DBG_PRINT("Kicking the queue\n");
2633 schedule_work(®_work);
2636 void regulatory_hint_disconnect(void)
2638 REG_DBG_PRINT("All devices are disconnected, going to restore regulatory settings\n");
2639 restore_regulatory_settings(false);
2642 static bool freq_is_chan_12_13_14(u16 freq)
2644 if (freq == ieee80211_channel_to_frequency(12, IEEE80211_BAND_2GHZ) ||
2645 freq == ieee80211_channel_to_frequency(13, IEEE80211_BAND_2GHZ) ||
2646 freq == ieee80211_channel_to_frequency(14, IEEE80211_BAND_2GHZ))
2651 static bool pending_reg_beacon(struct ieee80211_channel *beacon_chan)
2653 struct reg_beacon *pending_beacon;
2655 list_for_each_entry(pending_beacon, ®_pending_beacons, list)
2656 if (beacon_chan->center_freq ==
2657 pending_beacon->chan.center_freq)
2662 int regulatory_hint_found_beacon(struct wiphy *wiphy,
2663 struct ieee80211_channel *beacon_chan,
2666 struct reg_beacon *reg_beacon;
2669 if (beacon_chan->beacon_found ||
2670 beacon_chan->flags & IEEE80211_CHAN_RADAR ||
2671 (beacon_chan->band == IEEE80211_BAND_2GHZ &&
2672 !freq_is_chan_12_13_14(beacon_chan->center_freq)))
2675 spin_lock_bh(®_pending_beacons_lock);
2676 processing = pending_reg_beacon(beacon_chan);
2677 spin_unlock_bh(®_pending_beacons_lock);
2682 reg_beacon = kzalloc(sizeof(struct reg_beacon), gfp);
2686 REG_DBG_PRINT("Found new beacon on frequency: %d MHz (Ch %d) on %s\n",
2687 beacon_chan->center_freq,
2688 ieee80211_frequency_to_channel(beacon_chan->center_freq),
2691 memcpy(®_beacon->chan, beacon_chan,
2692 sizeof(struct ieee80211_channel));
2695 * Since we can be called from BH or and non-BH context
2696 * we must use spin_lock_bh()
2698 spin_lock_bh(®_pending_beacons_lock);
2699 list_add_tail(®_beacon->list, ®_pending_beacons);
2700 spin_unlock_bh(®_pending_beacons_lock);
2702 schedule_work(®_work);
2707 static void print_rd_rules(const struct ieee80211_regdomain *rd)
2710 const struct ieee80211_reg_rule *reg_rule = NULL;
2711 const struct ieee80211_freq_range *freq_range = NULL;
2712 const struct ieee80211_power_rule *power_rule = NULL;
2713 char bw[32], cac_time[32];
2715 pr_info(" (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp), (dfs_cac_time)\n");
2717 for (i = 0; i < rd->n_reg_rules; i++) {
2718 reg_rule = &rd->reg_rules[i];
2719 freq_range = ®_rule->freq_range;
2720 power_rule = ®_rule->power_rule;
2722 if (reg_rule->flags & NL80211_RRF_AUTO_BW)
2723 snprintf(bw, sizeof(bw), "%d KHz, %d KHz AUTO",
2724 freq_range->max_bandwidth_khz,
2725 reg_get_max_bandwidth(rd, reg_rule));
2727 snprintf(bw, sizeof(bw), "%d KHz",
2728 freq_range->max_bandwidth_khz);
2730 if (reg_rule->flags & NL80211_RRF_DFS)
2731 scnprintf(cac_time, sizeof(cac_time), "%u s",
2732 reg_rule->dfs_cac_ms/1000);
2734 scnprintf(cac_time, sizeof(cac_time), "N/A");
2738 * There may not be documentation for max antenna gain
2739 * in certain regions
2741 if (power_rule->max_antenna_gain)
2742 pr_info(" (%d KHz - %d KHz @ %s), (%d mBi, %d mBm), (%s)\n",
2743 freq_range->start_freq_khz,
2744 freq_range->end_freq_khz,
2746 power_rule->max_antenna_gain,
2747 power_rule->max_eirp,
2750 pr_info(" (%d KHz - %d KHz @ %s), (N/A, %d mBm), (%s)\n",
2751 freq_range->start_freq_khz,
2752 freq_range->end_freq_khz,
2754 power_rule->max_eirp,
2759 bool reg_supported_dfs_region(enum nl80211_dfs_regions dfs_region)
2761 switch (dfs_region) {
2762 case NL80211_DFS_UNSET:
2763 case NL80211_DFS_FCC:
2764 case NL80211_DFS_ETSI:
2765 case NL80211_DFS_JP:
2768 REG_DBG_PRINT("Ignoring uknown DFS master region: %d\n",
2774 static void print_regdomain(const struct ieee80211_regdomain *rd)
2776 struct regulatory_request *lr = get_last_request();
2778 if (is_intersected_alpha2(rd->alpha2)) {
2779 if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) {
2780 struct cfg80211_registered_device *rdev;
2781 rdev = cfg80211_rdev_by_wiphy_idx(lr->wiphy_idx);
2783 pr_info("Current regulatory domain updated by AP to: %c%c\n",
2784 rdev->country_ie_alpha2[0],
2785 rdev->country_ie_alpha2[1]);
2787 pr_info("Current regulatory domain intersected:\n");
2789 pr_info("Current regulatory domain intersected:\n");
2790 } else if (is_world_regdom(rd->alpha2)) {
2791 pr_info("World regulatory domain updated:\n");
2793 if (is_unknown_alpha2(rd->alpha2))
2794 pr_info("Regulatory domain changed to driver built-in settings (unknown country)\n");
2796 if (reg_request_cell_base(lr))
2797 pr_info("Regulatory domain changed to country: %c%c by Cell Station\n",
2798 rd->alpha2[0], rd->alpha2[1]);
2800 pr_info("Regulatory domain changed to country: %c%c\n",
2801 rd->alpha2[0], rd->alpha2[1]);
2805 pr_info(" DFS Master region: %s", reg_dfs_region_str(rd->dfs_region));
2809 static void print_regdomain_info(const struct ieee80211_regdomain *rd)
2811 pr_info("Regulatory domain: %c%c\n", rd->alpha2[0], rd->alpha2[1]);
2815 static int reg_set_rd_core(const struct ieee80211_regdomain *rd)
2817 if (!is_world_regdom(rd->alpha2))
2819 update_world_regdomain(rd);
2823 static int reg_set_rd_user(const struct ieee80211_regdomain *rd,
2824 struct regulatory_request *user_request)
2826 const struct ieee80211_regdomain *intersected_rd = NULL;
2828 if (!regdom_changes(rd->alpha2))
2831 if (!is_valid_rd(rd)) {
2832 pr_err("Invalid regulatory domain detected:\n");
2833 print_regdomain_info(rd);
2837 if (!user_request->intersect) {
2838 reset_regdomains(false, rd);
2842 intersected_rd = regdom_intersect(rd, get_cfg80211_regdom());
2843 if (!intersected_rd)
2848 reset_regdomains(false, intersected_rd);
2853 static int reg_set_rd_driver(const struct ieee80211_regdomain *rd,
2854 struct regulatory_request *driver_request)
2856 const struct ieee80211_regdomain *regd;
2857 const struct ieee80211_regdomain *intersected_rd = NULL;
2858 const struct ieee80211_regdomain *tmp;
2859 struct wiphy *request_wiphy;
2861 if (is_world_regdom(rd->alpha2))
2864 if (!regdom_changes(rd->alpha2))
2867 if (!is_valid_rd(rd)) {
2868 pr_err("Invalid regulatory domain detected:\n");
2869 print_regdomain_info(rd);
2873 request_wiphy = wiphy_idx_to_wiphy(driver_request->wiphy_idx);
2874 if (!request_wiphy) {
2875 queue_delayed_work(system_power_efficient_wq,
2880 if (!driver_request->intersect) {
2881 if (request_wiphy->regd)
2884 regd = reg_copy_regd(rd);
2886 return PTR_ERR(regd);
2888 rcu_assign_pointer(request_wiphy->regd, regd);
2889 reset_regdomains(false, rd);
2893 intersected_rd = regdom_intersect(rd, get_cfg80211_regdom());
2894 if (!intersected_rd)
2898 * We can trash what CRDA provided now.
2899 * However if a driver requested this specific regulatory
2900 * domain we keep it for its private use
2902 tmp = get_wiphy_regdom(request_wiphy);
2903 rcu_assign_pointer(request_wiphy->regd, rd);
2904 rcu_free_regdom(tmp);
2908 reset_regdomains(false, intersected_rd);
2913 static int reg_set_rd_country_ie(const struct ieee80211_regdomain *rd,
2914 struct regulatory_request *country_ie_request)
2916 struct wiphy *request_wiphy;
2918 if (!is_alpha2_set(rd->alpha2) && !is_an_alpha2(rd->alpha2) &&
2919 !is_unknown_alpha2(rd->alpha2))
2923 * Lets only bother proceeding on the same alpha2 if the current
2924 * rd is non static (it means CRDA was present and was used last)
2925 * and the pending request came in from a country IE
2928 if (!is_valid_rd(rd)) {
2929 pr_err("Invalid regulatory domain detected:\n");
2930 print_regdomain_info(rd);
2934 request_wiphy = wiphy_idx_to_wiphy(country_ie_request->wiphy_idx);
2935 if (!request_wiphy) {
2936 queue_delayed_work(system_power_efficient_wq,
2941 if (country_ie_request->intersect)
2944 reset_regdomains(false, rd);
2949 * Use this call to set the current regulatory domain. Conflicts with
2950 * multiple drivers can be ironed out later. Caller must've already
2951 * kmalloc'd the rd structure.
2953 int set_regdom(const struct ieee80211_regdomain *rd,
2954 enum ieee80211_regd_source regd_src)
2956 struct regulatory_request *lr;
2957 bool user_reset = false;
2960 if (!reg_is_valid_request(rd->alpha2)) {
2965 if (regd_src == REGD_SOURCE_CRDA)
2966 reg_crda_timeouts = 0;
2968 lr = get_last_request();
2970 /* Note that this doesn't update the wiphys, this is done below */
2971 switch (lr->initiator) {
2972 case NL80211_REGDOM_SET_BY_CORE:
2973 r = reg_set_rd_core(rd);
2975 case NL80211_REGDOM_SET_BY_USER:
2976 r = reg_set_rd_user(rd, lr);
2979 case NL80211_REGDOM_SET_BY_DRIVER:
2980 r = reg_set_rd_driver(rd, lr);
2982 case NL80211_REGDOM_SET_BY_COUNTRY_IE:
2983 r = reg_set_rd_country_ie(rd, lr);
2986 WARN(1, "invalid initiator %d\n", lr->initiator);
2993 reg_set_request_processed();
2996 /* Back to world regulatory in case of errors */
2997 restore_regulatory_settings(user_reset);
3004 /* This would make this whole thing pointless */
3005 if (WARN_ON(!lr->intersect && rd != get_cfg80211_regdom()))
3008 /* update all wiphys now with the new established regulatory domain */
3009 update_all_wiphy_regulatory(lr->initiator);
3011 print_regdomain(get_cfg80211_regdom());
3013 nl80211_send_reg_change_event(lr);
3015 reg_set_request_processed();
3020 static int __regulatory_set_wiphy_regd(struct wiphy *wiphy,
3021 struct ieee80211_regdomain *rd)
3023 const struct ieee80211_regdomain *regd;
3024 const struct ieee80211_regdomain *prev_regd;
3025 struct cfg80211_registered_device *rdev;
3027 if (WARN_ON(!wiphy || !rd))
3030 if (WARN(!(wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED),
3031 "wiphy should have REGULATORY_WIPHY_SELF_MANAGED\n"))
3034 if (WARN(!is_valid_rd(rd), "Invalid regulatory domain detected\n")) {
3035 print_regdomain_info(rd);
3039 regd = reg_copy_regd(rd);
3041 return PTR_ERR(regd);
3043 rdev = wiphy_to_rdev(wiphy);
3045 spin_lock(®_requests_lock);
3046 prev_regd = rdev->requested_regd;
3047 rdev->requested_regd = regd;
3048 spin_unlock(®_requests_lock);
3054 int regulatory_set_wiphy_regd(struct wiphy *wiphy,
3055 struct ieee80211_regdomain *rd)
3057 int ret = __regulatory_set_wiphy_regd(wiphy, rd);
3062 schedule_work(®_work);
3065 EXPORT_SYMBOL(regulatory_set_wiphy_regd);
3067 int regulatory_set_wiphy_regd_sync_rtnl(struct wiphy *wiphy,
3068 struct ieee80211_regdomain *rd)
3074 ret = __regulatory_set_wiphy_regd(wiphy, rd);
3078 /* process the request immediately */
3079 reg_process_self_managed_hints();
3082 EXPORT_SYMBOL(regulatory_set_wiphy_regd_sync_rtnl);
3084 void wiphy_regulatory_register(struct wiphy *wiphy)
3086 struct regulatory_request *lr;
3088 /* self-managed devices ignore external hints */
3089 if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED)
3090 wiphy->regulatory_flags |= REGULATORY_DISABLE_BEACON_HINTS |
3091 REGULATORY_COUNTRY_IE_IGNORE;
3093 if (!reg_dev_ignore_cell_hint(wiphy))
3094 reg_num_devs_support_basehint++;
3096 lr = get_last_request();
3097 wiphy_update_regulatory(wiphy, lr->initiator);
3100 void wiphy_regulatory_deregister(struct wiphy *wiphy)
3102 struct wiphy *request_wiphy = NULL;
3103 struct regulatory_request *lr;
3105 lr = get_last_request();
3107 if (!reg_dev_ignore_cell_hint(wiphy))
3108 reg_num_devs_support_basehint--;
3110 rcu_free_regdom(get_wiphy_regdom(wiphy));
3111 RCU_INIT_POINTER(wiphy->regd, NULL);
3114 request_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx);
3116 if (!request_wiphy || request_wiphy != wiphy)
3119 lr->wiphy_idx = WIPHY_IDX_INVALID;
3120 lr->country_ie_env = ENVIRON_ANY;
3123 static void reg_timeout_work(struct work_struct *work)
3125 REG_DBG_PRINT("Timeout while waiting for CRDA to reply, restoring regulatory settings\n");
3127 reg_crda_timeouts++;
3128 restore_regulatory_settings(true);
3133 * See http://www.fcc.gov/document/5-ghz-unlicensed-spectrum-unii, for
3134 * UNII band definitions
3136 int cfg80211_get_unii(int freq)
3139 if (freq >= 5150 && freq <= 5250)
3143 if (freq > 5250 && freq <= 5350)
3147 if (freq > 5350 && freq <= 5470)
3151 if (freq > 5470 && freq <= 5725)
3155 if (freq > 5725 && freq <= 5825)
3161 bool regulatory_indoor_allowed(void)
3163 return reg_is_indoor;
3166 int __init regulatory_init(void)
3170 reg_pdev = platform_device_register_simple("regulatory", 0, NULL, 0);
3171 if (IS_ERR(reg_pdev))
3172 return PTR_ERR(reg_pdev);
3174 spin_lock_init(®_requests_lock);
3175 spin_lock_init(®_pending_beacons_lock);
3176 spin_lock_init(®_indoor_lock);
3178 reg_regdb_size_check();
3180 rcu_assign_pointer(cfg80211_regdomain, cfg80211_world_regdom);
3182 user_alpha2[0] = '9';
3183 user_alpha2[1] = '7';
3185 /* We always try to get an update for the static regdomain */
3186 err = regulatory_hint_core(cfg80211_world_regdom->alpha2);
3191 * N.B. kobject_uevent_env() can fail mainly for when we're out
3192 * memory which is handled and propagated appropriately above
3193 * but it can also fail during a netlink_broadcast() or during
3194 * early boot for call_usermodehelper(). For now treat these
3195 * errors as non-fatal.
3197 pr_err("kobject_uevent_env() was unable to call CRDA during init\n");
3201 * Finally, if the user set the module parameter treat it
3204 if (!is_world_regdom(ieee80211_regdom))
3205 regulatory_hint_user(ieee80211_regdom,
3206 NL80211_USER_REG_HINT_USER);
3211 void regulatory_exit(void)
3213 struct regulatory_request *reg_request, *tmp;
3214 struct reg_beacon *reg_beacon, *btmp;
3216 cancel_work_sync(®_work);
3217 cancel_delayed_work_sync(®_timeout);
3218 cancel_delayed_work_sync(®_check_chans);
3220 /* Lock to suppress warnings */
3222 reset_regdomains(true, NULL);
3225 dev_set_uevent_suppress(®_pdev->dev, true);
3227 platform_device_unregister(reg_pdev);
3229 list_for_each_entry_safe(reg_beacon, btmp, ®_pending_beacons, list) {
3230 list_del(®_beacon->list);
3234 list_for_each_entry_safe(reg_beacon, btmp, ®_beacon_list, list) {
3235 list_del(®_beacon->list);
3239 list_for_each_entry_safe(reg_request, tmp, ®_requests_list, list) {
3240 list_del(®_request->list);