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_apply_request {
457 struct list_head list;
458 const struct ieee80211_regdomain *regdom;
461 static LIST_HEAD(reg_regdb_apply_list);
462 static DEFINE_MUTEX(reg_regdb_apply_mutex);
464 static void reg_regdb_apply(struct work_struct *work)
466 struct reg_regdb_apply_request *request;
470 mutex_lock(®_regdb_apply_mutex);
471 while (!list_empty(®_regdb_apply_list)) {
472 request = list_first_entry(®_regdb_apply_list,
473 struct reg_regdb_apply_request,
475 list_del(&request->list);
477 set_regdom(request->regdom, REGD_SOURCE_INTERNAL_DB);
480 mutex_unlock(®_regdb_apply_mutex);
485 static DECLARE_WORK(reg_regdb_work, reg_regdb_apply);
487 static int reg_regdb_query(const char *alpha2)
489 const struct ieee80211_regdomain *regdom = NULL;
490 struct reg_regdb_apply_request *request;
493 for (i = 0; i < reg_regdb_size; i++) {
494 if (alpha2_equal(alpha2, reg_regdb[i]->alpha2)) {
495 regdom = reg_regdb[i];
503 request = kzalloc(sizeof(struct reg_regdb_apply_request), GFP_KERNEL);
507 request->regdom = reg_copy_regd(regdom);
508 if (IS_ERR_OR_NULL(request->regdom)) {
513 mutex_lock(®_regdb_apply_mutex);
514 list_add_tail(&request->list, ®_regdb_apply_list);
515 mutex_unlock(®_regdb_apply_mutex);
517 schedule_work(®_regdb_work);
522 /* Feel free to add any other sanity checks here */
523 static void reg_regdb_size_check(void)
525 /* We should ideally BUILD_BUG_ON() but then random builds would fail */
526 WARN_ONCE(!reg_regdb_size, "db.txt is empty, you should update it...");
529 static inline void reg_regdb_size_check(void) {}
530 static inline int reg_regdb_query(const char *alpha2)
534 #endif /* CONFIG_CFG80211_INTERNAL_REGDB */
537 * This lets us keep regulatory code which is updated on a regulatory
538 * basis in userspace.
540 static int call_crda(const char *alpha2)
543 char *env[] = { country, NULL };
546 snprintf(country, sizeof(country), "COUNTRY=%c%c",
547 alpha2[0], alpha2[1]);
549 if (reg_crda_timeouts > REG_MAX_CRDA_TIMEOUTS) {
550 pr_debug("Exceeded CRDA call max attempts. Not calling CRDA\n");
554 if (!is_world_regdom((char *) alpha2))
555 pr_debug("Calling CRDA for country: %c%c\n",
556 alpha2[0], alpha2[1]);
558 pr_debug("Calling CRDA to update world regulatory domain\n");
560 ret = kobject_uevent_env(®_pdev->dev.kobj, KOBJ_CHANGE, env);
564 queue_delayed_work(system_power_efficient_wq,
565 ®_timeout, msecs_to_jiffies(3142));
569 static bool reg_query_database(struct regulatory_request *request)
571 /* query internal regulatory database (if it exists) */
572 if (reg_regdb_query(request->alpha2) == 0)
575 if (call_crda(request->alpha2) == 0)
581 bool reg_is_valid_request(const char *alpha2)
583 struct regulatory_request *lr = get_last_request();
585 if (!lr || lr->processed)
588 return alpha2_equal(lr->alpha2, alpha2);
591 static const struct ieee80211_regdomain *reg_get_regdomain(struct wiphy *wiphy)
593 struct regulatory_request *lr = get_last_request();
596 * Follow the driver's regulatory domain, if present, unless a country
597 * IE has been processed or a user wants to help complaince further
599 if (lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE &&
600 lr->initiator != NL80211_REGDOM_SET_BY_USER &&
602 return get_wiphy_regdom(wiphy);
604 return get_cfg80211_regdom();
608 reg_get_max_bandwidth_from_range(const struct ieee80211_regdomain *rd,
609 const struct ieee80211_reg_rule *rule)
611 const struct ieee80211_freq_range *freq_range = &rule->freq_range;
612 const struct ieee80211_freq_range *freq_range_tmp;
613 const struct ieee80211_reg_rule *tmp;
614 u32 start_freq, end_freq, idx, no;
616 for (idx = 0; idx < rd->n_reg_rules; idx++)
617 if (rule == &rd->reg_rules[idx])
620 if (idx == rd->n_reg_rules)
627 tmp = &rd->reg_rules[--no];
628 freq_range_tmp = &tmp->freq_range;
630 if (freq_range_tmp->end_freq_khz < freq_range->start_freq_khz)
633 freq_range = freq_range_tmp;
636 start_freq = freq_range->start_freq_khz;
639 freq_range = &rule->freq_range;
642 while (no < rd->n_reg_rules - 1) {
643 tmp = &rd->reg_rules[++no];
644 freq_range_tmp = &tmp->freq_range;
646 if (freq_range_tmp->start_freq_khz > freq_range->end_freq_khz)
649 freq_range = freq_range_tmp;
652 end_freq = freq_range->end_freq_khz;
654 return end_freq - start_freq;
657 unsigned int reg_get_max_bandwidth(const struct ieee80211_regdomain *rd,
658 const struct ieee80211_reg_rule *rule)
660 unsigned int bw = reg_get_max_bandwidth_from_range(rd, rule);
662 if (rule->flags & NL80211_RRF_NO_160MHZ)
663 bw = min_t(unsigned int, bw, MHZ_TO_KHZ(80));
664 if (rule->flags & NL80211_RRF_NO_80MHZ)
665 bw = min_t(unsigned int, bw, MHZ_TO_KHZ(40));
668 * HT40+/HT40- limits are handled per-channel. Only limit BW if both
671 if (rule->flags & NL80211_RRF_NO_HT40MINUS &&
672 rule->flags & NL80211_RRF_NO_HT40PLUS)
673 bw = min_t(unsigned int, bw, MHZ_TO_KHZ(20));
678 /* Sanity check on a regulatory rule */
679 static bool is_valid_reg_rule(const struct ieee80211_reg_rule *rule)
681 const struct ieee80211_freq_range *freq_range = &rule->freq_range;
684 if (freq_range->start_freq_khz <= 0 || freq_range->end_freq_khz <= 0)
687 if (freq_range->start_freq_khz > freq_range->end_freq_khz)
690 freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz;
692 if (freq_range->end_freq_khz <= freq_range->start_freq_khz ||
693 freq_range->max_bandwidth_khz > freq_diff)
699 static bool is_valid_rd(const struct ieee80211_regdomain *rd)
701 const struct ieee80211_reg_rule *reg_rule = NULL;
704 if (!rd->n_reg_rules)
707 if (WARN_ON(rd->n_reg_rules > NL80211_MAX_SUPP_REG_RULES))
710 for (i = 0; i < rd->n_reg_rules; i++) {
711 reg_rule = &rd->reg_rules[i];
712 if (!is_valid_reg_rule(reg_rule))
719 static bool reg_does_bw_fit(const struct ieee80211_freq_range *freq_range,
720 u32 center_freq_khz, u32 bw_khz)
722 u32 start_freq_khz, end_freq_khz;
724 start_freq_khz = center_freq_khz - (bw_khz/2);
725 end_freq_khz = center_freq_khz + (bw_khz/2);
727 if (start_freq_khz >= freq_range->start_freq_khz &&
728 end_freq_khz <= freq_range->end_freq_khz)
735 * freq_in_rule_band - tells us if a frequency is in a frequency band
736 * @freq_range: frequency rule we want to query
737 * @freq_khz: frequency we are inquiring about
739 * This lets us know if a specific frequency rule is or is not relevant to
740 * a specific frequency's band. Bands are device specific and artificial
741 * definitions (the "2.4 GHz band", the "5 GHz band" and the "60GHz band"),
742 * however it is safe for now to assume that a frequency rule should not be
743 * part of a frequency's band if the start freq or end freq are off by more
744 * than 2 GHz for the 2.4 and 5 GHz bands, and by more than 10 GHz for the
746 * This resolution can be lowered and should be considered as we add
747 * regulatory rule support for other "bands".
749 static bool freq_in_rule_band(const struct ieee80211_freq_range *freq_range,
752 #define ONE_GHZ_IN_KHZ 1000000
754 * From 802.11ad: directional multi-gigabit (DMG):
755 * Pertaining to operation in a frequency band containing a channel
756 * with the Channel starting frequency above 45 GHz.
758 u32 limit = freq_khz > 45 * ONE_GHZ_IN_KHZ ?
759 10 * ONE_GHZ_IN_KHZ : 2 * ONE_GHZ_IN_KHZ;
760 if (abs(freq_khz - freq_range->start_freq_khz) <= limit)
762 if (abs(freq_khz - freq_range->end_freq_khz) <= limit)
765 #undef ONE_GHZ_IN_KHZ
769 * Later on we can perhaps use the more restrictive DFS
770 * region but we don't have information for that yet so
771 * for now simply disallow conflicts.
773 static enum nl80211_dfs_regions
774 reg_intersect_dfs_region(const enum nl80211_dfs_regions dfs_region1,
775 const enum nl80211_dfs_regions dfs_region2)
777 if (dfs_region1 != dfs_region2)
778 return NL80211_DFS_UNSET;
783 * Helper for regdom_intersect(), this does the real
784 * mathematical intersection fun
786 static int reg_rules_intersect(const struct ieee80211_regdomain *rd1,
787 const struct ieee80211_regdomain *rd2,
788 const struct ieee80211_reg_rule *rule1,
789 const struct ieee80211_reg_rule *rule2,
790 struct ieee80211_reg_rule *intersected_rule)
792 const struct ieee80211_freq_range *freq_range1, *freq_range2;
793 struct ieee80211_freq_range *freq_range;
794 const struct ieee80211_power_rule *power_rule1, *power_rule2;
795 struct ieee80211_power_rule *power_rule;
796 u32 freq_diff, max_bandwidth1, max_bandwidth2;
798 freq_range1 = &rule1->freq_range;
799 freq_range2 = &rule2->freq_range;
800 freq_range = &intersected_rule->freq_range;
802 power_rule1 = &rule1->power_rule;
803 power_rule2 = &rule2->power_rule;
804 power_rule = &intersected_rule->power_rule;
806 freq_range->start_freq_khz = max(freq_range1->start_freq_khz,
807 freq_range2->start_freq_khz);
808 freq_range->end_freq_khz = min(freq_range1->end_freq_khz,
809 freq_range2->end_freq_khz);
811 max_bandwidth1 = freq_range1->max_bandwidth_khz;
812 max_bandwidth2 = freq_range2->max_bandwidth_khz;
814 if (rule1->flags & NL80211_RRF_AUTO_BW)
815 max_bandwidth1 = reg_get_max_bandwidth(rd1, rule1);
816 if (rule2->flags & NL80211_RRF_AUTO_BW)
817 max_bandwidth2 = reg_get_max_bandwidth(rd2, rule2);
819 freq_range->max_bandwidth_khz = min(max_bandwidth1, max_bandwidth2);
821 intersected_rule->flags = rule1->flags | rule2->flags;
824 * In case NL80211_RRF_AUTO_BW requested for both rules
825 * set AUTO_BW in intersected rule also. Next we will
826 * calculate BW correctly in handle_channel function.
827 * In other case remove AUTO_BW flag while we calculate
828 * maximum bandwidth correctly and auto calculation is
831 if ((rule1->flags & NL80211_RRF_AUTO_BW) &&
832 (rule2->flags & NL80211_RRF_AUTO_BW))
833 intersected_rule->flags |= NL80211_RRF_AUTO_BW;
835 intersected_rule->flags &= ~NL80211_RRF_AUTO_BW;
837 freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz;
838 if (freq_range->max_bandwidth_khz > freq_diff)
839 freq_range->max_bandwidth_khz = freq_diff;
841 power_rule->max_eirp = min(power_rule1->max_eirp,
842 power_rule2->max_eirp);
843 power_rule->max_antenna_gain = min(power_rule1->max_antenna_gain,
844 power_rule2->max_antenna_gain);
846 intersected_rule->dfs_cac_ms = max(rule1->dfs_cac_ms,
849 if (!is_valid_reg_rule(intersected_rule))
855 /* check whether old rule contains new rule */
856 static bool rule_contains(struct ieee80211_reg_rule *r1,
857 struct ieee80211_reg_rule *r2)
859 /* for simplicity, currently consider only same flags */
860 if (r1->flags != r2->flags)
863 /* verify r1 is more restrictive */
864 if ((r1->power_rule.max_antenna_gain >
865 r2->power_rule.max_antenna_gain) ||
866 r1->power_rule.max_eirp > r2->power_rule.max_eirp)
869 /* make sure r2's range is contained within r1 */
870 if (r1->freq_range.start_freq_khz > r2->freq_range.start_freq_khz ||
871 r1->freq_range.end_freq_khz < r2->freq_range.end_freq_khz)
874 /* and finally verify that r1.max_bw >= r2.max_bw */
875 if (r1->freq_range.max_bandwidth_khz <
876 r2->freq_range.max_bandwidth_khz)
882 /* add or extend current rules. do nothing if rule is already contained */
883 static void add_rule(struct ieee80211_reg_rule *rule,
884 struct ieee80211_reg_rule *reg_rules, u32 *n_rules)
886 struct ieee80211_reg_rule *tmp_rule;
889 for (i = 0; i < *n_rules; i++) {
890 tmp_rule = ®_rules[i];
891 /* rule is already contained - do nothing */
892 if (rule_contains(tmp_rule, rule))
895 /* extend rule if possible */
896 if (rule_contains(rule, tmp_rule)) {
897 memcpy(tmp_rule, rule, sizeof(*rule));
902 memcpy(®_rules[*n_rules], rule, sizeof(*rule));
907 * regdom_intersect - do the intersection between two regulatory domains
908 * @rd1: first regulatory domain
909 * @rd2: second regulatory domain
911 * Use this function to get the intersection between two regulatory domains.
912 * Once completed we will mark the alpha2 for the rd as intersected, "98",
913 * as no one single alpha2 can represent this regulatory domain.
915 * Returns a pointer to the regulatory domain structure which will hold the
916 * resulting intersection of rules between rd1 and rd2. We will
917 * kzalloc() this structure for you.
919 static struct ieee80211_regdomain *
920 regdom_intersect(const struct ieee80211_regdomain *rd1,
921 const struct ieee80211_regdomain *rd2)
925 unsigned int num_rules = 0;
926 const struct ieee80211_reg_rule *rule1, *rule2;
927 struct ieee80211_reg_rule intersected_rule;
928 struct ieee80211_regdomain *rd;
934 * First we get a count of the rules we'll need, then we actually
935 * build them. This is to so we can malloc() and free() a
936 * regdomain once. The reason we use reg_rules_intersect() here
937 * is it will return -EINVAL if the rule computed makes no sense.
938 * All rules that do check out OK are valid.
941 for (x = 0; x < rd1->n_reg_rules; x++) {
942 rule1 = &rd1->reg_rules[x];
943 for (y = 0; y < rd2->n_reg_rules; y++) {
944 rule2 = &rd2->reg_rules[y];
945 if (!reg_rules_intersect(rd1, rd2, rule1, rule2,
954 size_of_regd = sizeof(struct ieee80211_regdomain) +
955 num_rules * sizeof(struct ieee80211_reg_rule);
957 rd = kzalloc(size_of_regd, GFP_KERNEL);
961 for (x = 0; x < rd1->n_reg_rules; x++) {
962 rule1 = &rd1->reg_rules[x];
963 for (y = 0; y < rd2->n_reg_rules; y++) {
964 rule2 = &rd2->reg_rules[y];
965 r = reg_rules_intersect(rd1, rd2, rule1, rule2,
968 * No need to memset here the intersected rule here as
969 * we're not using the stack anymore
974 add_rule(&intersected_rule, rd->reg_rules,
981 rd->dfs_region = reg_intersect_dfs_region(rd1->dfs_region,
988 * XXX: add support for the rest of enum nl80211_reg_rule_flags, we may
989 * want to just have the channel structure use these
991 static u32 map_regdom_flags(u32 rd_flags)
993 u32 channel_flags = 0;
994 if (rd_flags & NL80211_RRF_NO_IR_ALL)
995 channel_flags |= IEEE80211_CHAN_NO_IR;
996 if (rd_flags & NL80211_RRF_DFS)
997 channel_flags |= IEEE80211_CHAN_RADAR;
998 if (rd_flags & NL80211_RRF_NO_OFDM)
999 channel_flags |= IEEE80211_CHAN_NO_OFDM;
1000 if (rd_flags & NL80211_RRF_NO_OUTDOOR)
1001 channel_flags |= IEEE80211_CHAN_INDOOR_ONLY;
1002 if (rd_flags & NL80211_RRF_IR_CONCURRENT)
1003 channel_flags |= IEEE80211_CHAN_IR_CONCURRENT;
1004 if (rd_flags & NL80211_RRF_NO_HT40MINUS)
1005 channel_flags |= IEEE80211_CHAN_NO_HT40MINUS;
1006 if (rd_flags & NL80211_RRF_NO_HT40PLUS)
1007 channel_flags |= IEEE80211_CHAN_NO_HT40PLUS;
1008 if (rd_flags & NL80211_RRF_NO_80MHZ)
1009 channel_flags |= IEEE80211_CHAN_NO_80MHZ;
1010 if (rd_flags & NL80211_RRF_NO_160MHZ)
1011 channel_flags |= IEEE80211_CHAN_NO_160MHZ;
1012 return channel_flags;
1015 static const struct ieee80211_reg_rule *
1016 freq_reg_info_regd(struct wiphy *wiphy, u32 center_freq,
1017 const struct ieee80211_regdomain *regd, u32 bw)
1020 bool band_rule_found = false;
1021 bool bw_fits = false;
1024 return ERR_PTR(-EINVAL);
1026 for (i = 0; i < regd->n_reg_rules; i++) {
1027 const struct ieee80211_reg_rule *rr;
1028 const struct ieee80211_freq_range *fr = NULL;
1030 rr = ®d->reg_rules[i];
1031 fr = &rr->freq_range;
1034 * We only need to know if one frequency rule was
1035 * was in center_freq's band, that's enough, so lets
1036 * not overwrite it once found
1038 if (!band_rule_found)
1039 band_rule_found = freq_in_rule_band(fr, center_freq);
1041 bw_fits = reg_does_bw_fit(fr, center_freq, bw);
1043 if (band_rule_found && bw_fits)
1047 if (!band_rule_found)
1048 return ERR_PTR(-ERANGE);
1050 return ERR_PTR(-EINVAL);
1053 static const struct ieee80211_reg_rule *
1054 __freq_reg_info(struct wiphy *wiphy, u32 center_freq, u32 min_bw)
1056 const struct ieee80211_regdomain *regd = reg_get_regdomain(wiphy);
1057 const struct ieee80211_reg_rule *reg_rule = NULL;
1060 for (bw = MHZ_TO_KHZ(20); bw >= min_bw; bw = bw / 2) {
1061 reg_rule = freq_reg_info_regd(wiphy, center_freq, regd, bw);
1062 if (!IS_ERR(reg_rule))
1069 const struct ieee80211_reg_rule *freq_reg_info(struct wiphy *wiphy,
1072 return __freq_reg_info(wiphy, center_freq, MHZ_TO_KHZ(20));
1074 EXPORT_SYMBOL(freq_reg_info);
1076 const char *reg_initiator_name(enum nl80211_reg_initiator initiator)
1078 switch (initiator) {
1079 case NL80211_REGDOM_SET_BY_CORE:
1081 case NL80211_REGDOM_SET_BY_USER:
1083 case NL80211_REGDOM_SET_BY_DRIVER:
1085 case NL80211_REGDOM_SET_BY_COUNTRY_IE:
1086 return "country IE";
1092 EXPORT_SYMBOL(reg_initiator_name);
1094 #ifdef CONFIG_CFG80211_REG_DEBUG
1095 static void chan_reg_rule_print_dbg(const struct ieee80211_regdomain *regd,
1096 struct ieee80211_channel *chan,
1097 const struct ieee80211_reg_rule *reg_rule)
1099 const struct ieee80211_power_rule *power_rule;
1100 const struct ieee80211_freq_range *freq_range;
1101 char max_antenna_gain[32], bw[32];
1103 power_rule = ®_rule->power_rule;
1104 freq_range = ®_rule->freq_range;
1106 if (!power_rule->max_antenna_gain)
1107 snprintf(max_antenna_gain, sizeof(max_antenna_gain), "N/A");
1109 snprintf(max_antenna_gain, sizeof(max_antenna_gain), "%d",
1110 power_rule->max_antenna_gain);
1112 if (reg_rule->flags & NL80211_RRF_AUTO_BW)
1113 snprintf(bw, sizeof(bw), "%d KHz, %d KHz AUTO",
1114 freq_range->max_bandwidth_khz,
1115 reg_get_max_bandwidth(regd, reg_rule));
1117 snprintf(bw, sizeof(bw), "%d KHz",
1118 freq_range->max_bandwidth_khz);
1120 REG_DBG_PRINT("Updating information on frequency %d MHz with regulatory rule:\n",
1123 REG_DBG_PRINT("%d KHz - %d KHz @ %s), (%s mBi, %d mBm)\n",
1124 freq_range->start_freq_khz, freq_range->end_freq_khz,
1125 bw, max_antenna_gain,
1126 power_rule->max_eirp);
1129 static void chan_reg_rule_print_dbg(const struct ieee80211_regdomain *regd,
1130 struct ieee80211_channel *chan,
1131 const struct ieee80211_reg_rule *reg_rule)
1138 * Note that right now we assume the desired channel bandwidth
1139 * is always 20 MHz for each individual channel (HT40 uses 20 MHz
1140 * per channel, the primary and the extension channel).
1142 static void handle_channel(struct wiphy *wiphy,
1143 enum nl80211_reg_initiator initiator,
1144 struct ieee80211_channel *chan)
1146 u32 flags, bw_flags = 0;
1147 const struct ieee80211_reg_rule *reg_rule = NULL;
1148 const struct ieee80211_power_rule *power_rule = NULL;
1149 const struct ieee80211_freq_range *freq_range = NULL;
1150 struct wiphy *request_wiphy = NULL;
1151 struct regulatory_request *lr = get_last_request();
1152 const struct ieee80211_regdomain *regd;
1153 u32 max_bandwidth_khz;
1155 request_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx);
1157 flags = chan->orig_flags;
1159 reg_rule = freq_reg_info(wiphy, MHZ_TO_KHZ(chan->center_freq));
1160 if (IS_ERR(reg_rule)) {
1162 * We will disable all channels that do not match our
1163 * received regulatory rule unless the hint is coming
1164 * from a Country IE and the Country IE had no information
1165 * about a band. The IEEE 802.11 spec allows for an AP
1166 * to send only a subset of the regulatory rules allowed,
1167 * so an AP in the US that only supports 2.4 GHz may only send
1168 * a country IE with information for the 2.4 GHz band
1169 * while 5 GHz is still supported.
1171 if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE &&
1172 PTR_ERR(reg_rule) == -ERANGE)
1175 if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER &&
1176 request_wiphy && request_wiphy == wiphy &&
1177 request_wiphy->regulatory_flags & REGULATORY_STRICT_REG) {
1178 REG_DBG_PRINT("Disabling freq %d MHz for good\n",
1180 chan->orig_flags |= IEEE80211_CHAN_DISABLED;
1181 chan->flags = chan->orig_flags;
1183 REG_DBG_PRINT("Disabling freq %d MHz\n",
1185 chan->flags |= IEEE80211_CHAN_DISABLED;
1190 regd = reg_get_regdomain(wiphy);
1191 chan_reg_rule_print_dbg(regd, chan, reg_rule);
1193 power_rule = ®_rule->power_rule;
1194 freq_range = ®_rule->freq_range;
1196 max_bandwidth_khz = freq_range->max_bandwidth_khz;
1197 /* Check if auto calculation requested */
1198 if (reg_rule->flags & NL80211_RRF_AUTO_BW)
1199 max_bandwidth_khz = reg_get_max_bandwidth(regd, reg_rule);
1201 /* If we get a reg_rule we can assume that at least 5Mhz fit */
1202 if (!reg_does_bw_fit(freq_range, MHZ_TO_KHZ(chan->center_freq),
1204 bw_flags |= IEEE80211_CHAN_NO_10MHZ;
1205 if (!reg_does_bw_fit(freq_range, MHZ_TO_KHZ(chan->center_freq),
1207 bw_flags |= IEEE80211_CHAN_NO_20MHZ;
1209 if (max_bandwidth_khz < MHZ_TO_KHZ(10))
1210 bw_flags |= IEEE80211_CHAN_NO_10MHZ;
1211 if (max_bandwidth_khz < MHZ_TO_KHZ(20))
1212 bw_flags |= IEEE80211_CHAN_NO_20MHZ;
1213 if (max_bandwidth_khz < MHZ_TO_KHZ(40))
1214 bw_flags |= IEEE80211_CHAN_NO_HT40;
1215 if (max_bandwidth_khz < MHZ_TO_KHZ(80))
1216 bw_flags |= IEEE80211_CHAN_NO_80MHZ;
1217 if (max_bandwidth_khz < MHZ_TO_KHZ(160))
1218 bw_flags |= IEEE80211_CHAN_NO_160MHZ;
1220 if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER &&
1221 request_wiphy && request_wiphy == wiphy &&
1222 request_wiphy->regulatory_flags & REGULATORY_STRICT_REG) {
1224 * This guarantees the driver's requested regulatory domain
1225 * will always be used as a base for further regulatory
1228 chan->flags = chan->orig_flags =
1229 map_regdom_flags(reg_rule->flags) | bw_flags;
1230 chan->max_antenna_gain = chan->orig_mag =
1231 (int) MBI_TO_DBI(power_rule->max_antenna_gain);
1232 chan->max_reg_power = chan->max_power = chan->orig_mpwr =
1233 (int) MBM_TO_DBM(power_rule->max_eirp);
1235 if (chan->flags & IEEE80211_CHAN_RADAR) {
1236 chan->dfs_cac_ms = IEEE80211_DFS_MIN_CAC_TIME_MS;
1237 if (reg_rule->dfs_cac_ms)
1238 chan->dfs_cac_ms = reg_rule->dfs_cac_ms;
1244 chan->dfs_state = NL80211_DFS_USABLE;
1245 chan->dfs_state_entered = jiffies;
1247 chan->beacon_found = false;
1248 chan->flags = flags | bw_flags | map_regdom_flags(reg_rule->flags);
1249 chan->max_antenna_gain =
1250 min_t(int, chan->orig_mag,
1251 MBI_TO_DBI(power_rule->max_antenna_gain));
1252 chan->max_reg_power = (int) MBM_TO_DBM(power_rule->max_eirp);
1254 if (chan->flags & IEEE80211_CHAN_RADAR) {
1255 if (reg_rule->dfs_cac_ms)
1256 chan->dfs_cac_ms = reg_rule->dfs_cac_ms;
1258 chan->dfs_cac_ms = IEEE80211_DFS_MIN_CAC_TIME_MS;
1261 if (chan->orig_mpwr) {
1263 * Devices that use REGULATORY_COUNTRY_IE_FOLLOW_POWER
1264 * will always follow the passed country IE power settings.
1266 if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE &&
1267 wiphy->regulatory_flags & REGULATORY_COUNTRY_IE_FOLLOW_POWER)
1268 chan->max_power = chan->max_reg_power;
1270 chan->max_power = min(chan->orig_mpwr,
1271 chan->max_reg_power);
1273 chan->max_power = chan->max_reg_power;
1276 static void handle_band(struct wiphy *wiphy,
1277 enum nl80211_reg_initiator initiator,
1278 struct ieee80211_supported_band *sband)
1285 for (i = 0; i < sband->n_channels; i++)
1286 handle_channel(wiphy, initiator, &sband->channels[i]);
1289 static bool reg_request_cell_base(struct regulatory_request *request)
1291 if (request->initiator != NL80211_REGDOM_SET_BY_USER)
1293 return request->user_reg_hint_type == NL80211_USER_REG_HINT_CELL_BASE;
1296 bool reg_last_request_cell_base(void)
1298 return reg_request_cell_base(get_last_request());
1301 #ifdef CONFIG_CFG80211_REG_CELLULAR_HINTS
1302 /* Core specific check */
1303 static enum reg_request_treatment
1304 reg_ignore_cell_hint(struct regulatory_request *pending_request)
1306 struct regulatory_request *lr = get_last_request();
1308 if (!reg_num_devs_support_basehint)
1309 return REG_REQ_IGNORE;
1311 if (reg_request_cell_base(lr) &&
1312 !regdom_changes(pending_request->alpha2))
1313 return REG_REQ_ALREADY_SET;
1318 /* Device specific check */
1319 static bool reg_dev_ignore_cell_hint(struct wiphy *wiphy)
1321 return !(wiphy->features & NL80211_FEATURE_CELL_BASE_REG_HINTS);
1324 static int reg_ignore_cell_hint(struct regulatory_request *pending_request)
1326 return REG_REQ_IGNORE;
1329 static bool reg_dev_ignore_cell_hint(struct wiphy *wiphy)
1335 static bool wiphy_strict_alpha2_regd(struct wiphy *wiphy)
1337 if (wiphy->regulatory_flags & REGULATORY_STRICT_REG &&
1338 !(wiphy->regulatory_flags & REGULATORY_CUSTOM_REG))
1343 static bool ignore_reg_update(struct wiphy *wiphy,
1344 enum nl80211_reg_initiator initiator)
1346 struct regulatory_request *lr = get_last_request();
1348 if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED)
1352 REG_DBG_PRINT("Ignoring regulatory request set by %s "
1353 "since last_request is not set\n",
1354 reg_initiator_name(initiator));
1358 if (initiator == NL80211_REGDOM_SET_BY_CORE &&
1359 wiphy->regulatory_flags & REGULATORY_CUSTOM_REG) {
1360 REG_DBG_PRINT("Ignoring regulatory request set by %s "
1361 "since the driver uses its own custom "
1362 "regulatory domain\n",
1363 reg_initiator_name(initiator));
1368 * wiphy->regd will be set once the device has its own
1369 * desired regulatory domain set
1371 if (wiphy_strict_alpha2_regd(wiphy) && !wiphy->regd &&
1372 initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE &&
1373 !is_world_regdom(lr->alpha2)) {
1374 REG_DBG_PRINT("Ignoring regulatory request set by %s "
1375 "since the driver requires its own regulatory "
1376 "domain to be set first\n",
1377 reg_initiator_name(initiator));
1381 if (reg_request_cell_base(lr))
1382 return reg_dev_ignore_cell_hint(wiphy);
1387 static bool reg_is_world_roaming(struct wiphy *wiphy)
1389 const struct ieee80211_regdomain *cr = get_cfg80211_regdom();
1390 const struct ieee80211_regdomain *wr = get_wiphy_regdom(wiphy);
1391 struct regulatory_request *lr = get_last_request();
1393 if (is_world_regdom(cr->alpha2) || (wr && is_world_regdom(wr->alpha2)))
1396 if (lr && lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE &&
1397 wiphy->regulatory_flags & REGULATORY_CUSTOM_REG)
1403 static void handle_reg_beacon(struct wiphy *wiphy, unsigned int chan_idx,
1404 struct reg_beacon *reg_beacon)
1406 struct ieee80211_supported_band *sband;
1407 struct ieee80211_channel *chan;
1408 bool channel_changed = false;
1409 struct ieee80211_channel chan_before;
1411 sband = wiphy->bands[reg_beacon->chan.band];
1412 chan = &sband->channels[chan_idx];
1414 if (likely(chan->center_freq != reg_beacon->chan.center_freq))
1417 if (chan->beacon_found)
1420 chan->beacon_found = true;
1422 if (!reg_is_world_roaming(wiphy))
1425 if (wiphy->regulatory_flags & REGULATORY_DISABLE_BEACON_HINTS)
1428 chan_before.center_freq = chan->center_freq;
1429 chan_before.flags = chan->flags;
1431 if (chan->flags & IEEE80211_CHAN_NO_IR) {
1432 chan->flags &= ~IEEE80211_CHAN_NO_IR;
1433 channel_changed = true;
1436 if (channel_changed)
1437 nl80211_send_beacon_hint_event(wiphy, &chan_before, chan);
1441 * Called when a scan on a wiphy finds a beacon on
1444 static void wiphy_update_new_beacon(struct wiphy *wiphy,
1445 struct reg_beacon *reg_beacon)
1448 struct ieee80211_supported_band *sband;
1450 if (!wiphy->bands[reg_beacon->chan.band])
1453 sband = wiphy->bands[reg_beacon->chan.band];
1455 for (i = 0; i < sband->n_channels; i++)
1456 handle_reg_beacon(wiphy, i, reg_beacon);
1460 * Called upon reg changes or a new wiphy is added
1462 static void wiphy_update_beacon_reg(struct wiphy *wiphy)
1465 struct ieee80211_supported_band *sband;
1466 struct reg_beacon *reg_beacon;
1468 list_for_each_entry(reg_beacon, ®_beacon_list, list) {
1469 if (!wiphy->bands[reg_beacon->chan.band])
1471 sband = wiphy->bands[reg_beacon->chan.band];
1472 for (i = 0; i < sband->n_channels; i++)
1473 handle_reg_beacon(wiphy, i, reg_beacon);
1477 /* Reap the advantages of previously found beacons */
1478 static void reg_process_beacons(struct wiphy *wiphy)
1481 * Means we are just firing up cfg80211, so no beacons would
1482 * have been processed yet.
1486 wiphy_update_beacon_reg(wiphy);
1489 static bool is_ht40_allowed(struct ieee80211_channel *chan)
1493 if (chan->flags & IEEE80211_CHAN_DISABLED)
1495 /* This would happen when regulatory rules disallow HT40 completely */
1496 if ((chan->flags & IEEE80211_CHAN_NO_HT40) == IEEE80211_CHAN_NO_HT40)
1501 static void reg_process_ht_flags_channel(struct wiphy *wiphy,
1502 struct ieee80211_channel *channel)
1504 struct ieee80211_supported_band *sband = wiphy->bands[channel->band];
1505 struct ieee80211_channel *channel_before = NULL, *channel_after = NULL;
1508 if (!is_ht40_allowed(channel)) {
1509 channel->flags |= IEEE80211_CHAN_NO_HT40;
1514 * We need to ensure the extension channels exist to
1515 * be able to use HT40- or HT40+, this finds them (or not)
1517 for (i = 0; i < sband->n_channels; i++) {
1518 struct ieee80211_channel *c = &sband->channels[i];
1520 if (c->center_freq == (channel->center_freq - 20))
1522 if (c->center_freq == (channel->center_freq + 20))
1527 * Please note that this assumes target bandwidth is 20 MHz,
1528 * if that ever changes we also need to change the below logic
1529 * to include that as well.
1531 if (!is_ht40_allowed(channel_before))
1532 channel->flags |= IEEE80211_CHAN_NO_HT40MINUS;
1534 channel->flags &= ~IEEE80211_CHAN_NO_HT40MINUS;
1536 if (!is_ht40_allowed(channel_after))
1537 channel->flags |= IEEE80211_CHAN_NO_HT40PLUS;
1539 channel->flags &= ~IEEE80211_CHAN_NO_HT40PLUS;
1542 static void reg_process_ht_flags_band(struct wiphy *wiphy,
1543 struct ieee80211_supported_band *sband)
1550 for (i = 0; i < sband->n_channels; i++)
1551 reg_process_ht_flags_channel(wiphy, &sband->channels[i]);
1554 static void reg_process_ht_flags(struct wiphy *wiphy)
1556 enum ieee80211_band band;
1561 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
1562 reg_process_ht_flags_band(wiphy, wiphy->bands[band]);
1565 static void reg_call_notifier(struct wiphy *wiphy,
1566 struct regulatory_request *request)
1568 if (wiphy->reg_notifier)
1569 wiphy->reg_notifier(wiphy, request);
1572 static bool reg_wdev_chan_valid(struct wiphy *wiphy, struct wireless_dev *wdev)
1574 struct cfg80211_chan_def chandef;
1575 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
1576 enum nl80211_iftype iftype;
1579 iftype = wdev->iftype;
1581 /* make sure the interface is active */
1582 if (!wdev->netdev || !netif_running(wdev->netdev))
1583 goto wdev_inactive_unlock;
1586 case NL80211_IFTYPE_AP:
1587 case NL80211_IFTYPE_P2P_GO:
1588 if (!wdev->beacon_interval)
1589 goto wdev_inactive_unlock;
1590 chandef = wdev->chandef;
1592 case NL80211_IFTYPE_ADHOC:
1593 if (!wdev->ssid_len)
1594 goto wdev_inactive_unlock;
1595 chandef = wdev->chandef;
1597 case NL80211_IFTYPE_STATION:
1598 case NL80211_IFTYPE_P2P_CLIENT:
1599 if (!wdev->current_bss ||
1600 !wdev->current_bss->pub.channel)
1601 goto wdev_inactive_unlock;
1603 if (!rdev->ops->get_channel ||
1604 rdev_get_channel(rdev, wdev, &chandef))
1605 cfg80211_chandef_create(&chandef,
1606 wdev->current_bss->pub.channel,
1607 NL80211_CHAN_NO_HT);
1609 case NL80211_IFTYPE_MONITOR:
1610 case NL80211_IFTYPE_AP_VLAN:
1611 case NL80211_IFTYPE_P2P_DEVICE:
1612 /* no enforcement required */
1615 /* others not implemented for now */
1623 case NL80211_IFTYPE_AP:
1624 case NL80211_IFTYPE_P2P_GO:
1625 case NL80211_IFTYPE_ADHOC:
1626 return cfg80211_reg_can_beacon_relax(wiphy, &chandef, iftype);
1627 case NL80211_IFTYPE_STATION:
1628 case NL80211_IFTYPE_P2P_CLIENT:
1629 return cfg80211_chandef_usable(wiphy, &chandef,
1630 IEEE80211_CHAN_DISABLED);
1637 wdev_inactive_unlock:
1642 static void reg_leave_invalid_chans(struct wiphy *wiphy)
1644 struct wireless_dev *wdev;
1645 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
1649 list_for_each_entry(wdev, &rdev->wdev_list, list)
1650 if (!reg_wdev_chan_valid(wiphy, wdev))
1651 cfg80211_leave(rdev, wdev);
1654 static void reg_check_chans_work(struct work_struct *work)
1656 struct cfg80211_registered_device *rdev;
1658 REG_DBG_PRINT("Verifying active interfaces after reg change\n");
1661 list_for_each_entry(rdev, &cfg80211_rdev_list, list)
1662 if (!(rdev->wiphy.regulatory_flags &
1663 REGULATORY_IGNORE_STALE_KICKOFF))
1664 reg_leave_invalid_chans(&rdev->wiphy);
1669 static void reg_check_channels(void)
1672 * Give usermode a chance to do something nicer (move to another
1673 * channel, orderly disconnection), before forcing a disconnection.
1675 mod_delayed_work(system_power_efficient_wq,
1677 msecs_to_jiffies(REG_ENFORCE_GRACE_MS));
1680 static void wiphy_update_regulatory(struct wiphy *wiphy,
1681 enum nl80211_reg_initiator initiator)
1683 enum ieee80211_band band;
1684 struct regulatory_request *lr = get_last_request();
1686 if (ignore_reg_update(wiphy, initiator)) {
1688 * Regulatory updates set by CORE are ignored for custom
1689 * regulatory cards. Let us notify the changes to the driver,
1690 * as some drivers used this to restore its orig_* reg domain.
1692 if (initiator == NL80211_REGDOM_SET_BY_CORE &&
1693 wiphy->regulatory_flags & REGULATORY_CUSTOM_REG)
1694 reg_call_notifier(wiphy, lr);
1698 lr->dfs_region = get_cfg80211_regdom()->dfs_region;
1700 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
1701 handle_band(wiphy, initiator, wiphy->bands[band]);
1703 reg_process_beacons(wiphy);
1704 reg_process_ht_flags(wiphy);
1705 reg_call_notifier(wiphy, lr);
1708 static void update_all_wiphy_regulatory(enum nl80211_reg_initiator initiator)
1710 struct cfg80211_registered_device *rdev;
1711 struct wiphy *wiphy;
1715 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
1716 wiphy = &rdev->wiphy;
1717 wiphy_update_regulatory(wiphy, initiator);
1720 reg_check_channels();
1723 static void handle_channel_custom(struct wiphy *wiphy,
1724 struct ieee80211_channel *chan,
1725 const struct ieee80211_regdomain *regd)
1728 const struct ieee80211_reg_rule *reg_rule = NULL;
1729 const struct ieee80211_power_rule *power_rule = NULL;
1730 const struct ieee80211_freq_range *freq_range = NULL;
1731 u32 max_bandwidth_khz;
1734 for (bw = MHZ_TO_KHZ(20); bw >= MHZ_TO_KHZ(5); bw = bw / 2) {
1735 reg_rule = freq_reg_info_regd(wiphy,
1736 MHZ_TO_KHZ(chan->center_freq),
1738 if (!IS_ERR(reg_rule))
1742 if (IS_ERR(reg_rule)) {
1743 REG_DBG_PRINT("Disabling freq %d MHz as custom regd has no rule that fits it\n",
1745 if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) {
1746 chan->flags |= IEEE80211_CHAN_DISABLED;
1748 chan->orig_flags |= IEEE80211_CHAN_DISABLED;
1749 chan->flags = chan->orig_flags;
1754 chan_reg_rule_print_dbg(regd, chan, reg_rule);
1756 power_rule = ®_rule->power_rule;
1757 freq_range = ®_rule->freq_range;
1759 max_bandwidth_khz = freq_range->max_bandwidth_khz;
1760 /* Check if auto calculation requested */
1761 if (reg_rule->flags & NL80211_RRF_AUTO_BW)
1762 max_bandwidth_khz = reg_get_max_bandwidth(regd, reg_rule);
1764 /* If we get a reg_rule we can assume that at least 5Mhz fit */
1765 if (!reg_does_bw_fit(freq_range, MHZ_TO_KHZ(chan->center_freq),
1767 bw_flags |= IEEE80211_CHAN_NO_10MHZ;
1768 if (!reg_does_bw_fit(freq_range, MHZ_TO_KHZ(chan->center_freq),
1770 bw_flags |= IEEE80211_CHAN_NO_20MHZ;
1772 if (max_bandwidth_khz < MHZ_TO_KHZ(10))
1773 bw_flags |= IEEE80211_CHAN_NO_10MHZ;
1774 if (max_bandwidth_khz < MHZ_TO_KHZ(20))
1775 bw_flags |= IEEE80211_CHAN_NO_20MHZ;
1776 if (max_bandwidth_khz < MHZ_TO_KHZ(40))
1777 bw_flags |= IEEE80211_CHAN_NO_HT40;
1778 if (max_bandwidth_khz < MHZ_TO_KHZ(80))
1779 bw_flags |= IEEE80211_CHAN_NO_80MHZ;
1780 if (max_bandwidth_khz < MHZ_TO_KHZ(160))
1781 bw_flags |= IEEE80211_CHAN_NO_160MHZ;
1783 chan->dfs_state_entered = jiffies;
1784 chan->dfs_state = NL80211_DFS_USABLE;
1786 chan->beacon_found = false;
1788 if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED)
1789 chan->flags = chan->orig_flags | bw_flags |
1790 map_regdom_flags(reg_rule->flags);
1792 chan->flags |= map_regdom_flags(reg_rule->flags) | bw_flags;
1794 chan->max_antenna_gain = (int) MBI_TO_DBI(power_rule->max_antenna_gain);
1795 chan->max_reg_power = chan->max_power =
1796 (int) MBM_TO_DBM(power_rule->max_eirp);
1798 if (chan->flags & IEEE80211_CHAN_RADAR) {
1799 if (reg_rule->dfs_cac_ms)
1800 chan->dfs_cac_ms = reg_rule->dfs_cac_ms;
1802 chan->dfs_cac_ms = IEEE80211_DFS_MIN_CAC_TIME_MS;
1805 chan->max_power = chan->max_reg_power;
1808 static void handle_band_custom(struct wiphy *wiphy,
1809 struct ieee80211_supported_band *sband,
1810 const struct ieee80211_regdomain *regd)
1817 for (i = 0; i < sband->n_channels; i++)
1818 handle_channel_custom(wiphy, &sband->channels[i], regd);
1821 /* Used by drivers prior to wiphy registration */
1822 void wiphy_apply_custom_regulatory(struct wiphy *wiphy,
1823 const struct ieee80211_regdomain *regd)
1825 enum ieee80211_band band;
1826 unsigned int bands_set = 0;
1828 WARN(!(wiphy->regulatory_flags & REGULATORY_CUSTOM_REG),
1829 "wiphy should have REGULATORY_CUSTOM_REG\n");
1830 wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG;
1832 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
1833 if (!wiphy->bands[band])
1835 handle_band_custom(wiphy, wiphy->bands[band], regd);
1840 * no point in calling this if it won't have any effect
1841 * on your device's supported bands.
1843 WARN_ON(!bands_set);
1845 EXPORT_SYMBOL(wiphy_apply_custom_regulatory);
1847 static void reg_set_request_processed(void)
1849 bool need_more_processing = false;
1850 struct regulatory_request *lr = get_last_request();
1852 lr->processed = true;
1854 spin_lock(®_requests_lock);
1855 if (!list_empty(®_requests_list))
1856 need_more_processing = true;
1857 spin_unlock(®_requests_lock);
1859 cancel_delayed_work(®_timeout);
1861 if (need_more_processing)
1862 schedule_work(®_work);
1866 * reg_process_hint_core - process core regulatory requests
1867 * @pending_request: a pending core regulatory request
1869 * The wireless subsystem can use this function to process
1870 * a regulatory request issued by the regulatory core.
1872 static void reg_process_hint_core(struct regulatory_request *core_request)
1874 if (reg_query_database(core_request)) {
1875 core_request->intersect = false;
1876 core_request->processed = false;
1877 reg_update_last_request(core_request);
1881 static enum reg_request_treatment
1882 __reg_process_hint_user(struct regulatory_request *user_request)
1884 struct regulatory_request *lr = get_last_request();
1886 if (reg_request_cell_base(user_request))
1887 return reg_ignore_cell_hint(user_request);
1889 if (reg_request_cell_base(lr))
1890 return REG_REQ_IGNORE;
1892 if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE)
1893 return REG_REQ_INTERSECT;
1895 * If the user knows better the user should set the regdom
1896 * to their country before the IE is picked up
1898 if (lr->initiator == NL80211_REGDOM_SET_BY_USER &&
1900 return REG_REQ_IGNORE;
1902 * Process user requests only after previous user/driver/core
1903 * requests have been processed
1905 if ((lr->initiator == NL80211_REGDOM_SET_BY_CORE ||
1906 lr->initiator == NL80211_REGDOM_SET_BY_DRIVER ||
1907 lr->initiator == NL80211_REGDOM_SET_BY_USER) &&
1908 regdom_changes(lr->alpha2))
1909 return REG_REQ_IGNORE;
1911 if (!regdom_changes(user_request->alpha2))
1912 return REG_REQ_ALREADY_SET;
1918 * reg_process_hint_user - process user regulatory requests
1919 * @user_request: a pending user regulatory request
1921 * The wireless subsystem can use this function to process
1922 * a regulatory request initiated by userspace.
1924 static void reg_process_hint_user(struct regulatory_request *user_request)
1926 enum reg_request_treatment treatment;
1928 treatment = __reg_process_hint_user(user_request);
1929 if (treatment == REG_REQ_IGNORE ||
1930 treatment == REG_REQ_ALREADY_SET) {
1931 reg_free_request(user_request);
1935 user_request->intersect = treatment == REG_REQ_INTERSECT;
1936 user_request->processed = false;
1938 if (reg_query_database(user_request)) {
1939 reg_update_last_request(user_request);
1940 user_alpha2[0] = user_request->alpha2[0];
1941 user_alpha2[1] = user_request->alpha2[1];
1943 reg_free_request(user_request);
1947 static enum reg_request_treatment
1948 __reg_process_hint_driver(struct regulatory_request *driver_request)
1950 struct regulatory_request *lr = get_last_request();
1952 if (lr->initiator == NL80211_REGDOM_SET_BY_CORE) {
1953 if (regdom_changes(driver_request->alpha2))
1955 return REG_REQ_ALREADY_SET;
1959 * This would happen if you unplug and plug your card
1960 * back in or if you add a new device for which the previously
1961 * loaded card also agrees on the regulatory domain.
1963 if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER &&
1964 !regdom_changes(driver_request->alpha2))
1965 return REG_REQ_ALREADY_SET;
1967 return REG_REQ_INTERSECT;
1971 * reg_process_hint_driver - process driver regulatory requests
1972 * @driver_request: a pending driver regulatory request
1974 * The wireless subsystem can use this function to process
1975 * a regulatory request issued by an 802.11 driver.
1977 * Returns one of the different reg request treatment values.
1979 static enum reg_request_treatment
1980 reg_process_hint_driver(struct wiphy *wiphy,
1981 struct regulatory_request *driver_request)
1983 const struct ieee80211_regdomain *regd, *tmp;
1984 enum reg_request_treatment treatment;
1986 treatment = __reg_process_hint_driver(driver_request);
1988 switch (treatment) {
1991 case REG_REQ_IGNORE:
1992 reg_free_request(driver_request);
1994 case REG_REQ_INTERSECT:
1996 case REG_REQ_ALREADY_SET:
1997 regd = reg_copy_regd(get_cfg80211_regdom());
1999 reg_free_request(driver_request);
2000 return REG_REQ_IGNORE;
2003 tmp = get_wiphy_regdom(wiphy);
2004 rcu_assign_pointer(wiphy->regd, regd);
2005 rcu_free_regdom(tmp);
2009 driver_request->intersect = treatment == REG_REQ_INTERSECT;
2010 driver_request->processed = false;
2013 * Since CRDA will not be called in this case as we already
2014 * have applied the requested regulatory domain before we just
2015 * inform userspace we have processed the request
2017 if (treatment == REG_REQ_ALREADY_SET) {
2018 nl80211_send_reg_change_event(driver_request);
2019 reg_update_last_request(driver_request);
2020 reg_set_request_processed();
2024 if (reg_query_database(driver_request))
2025 reg_update_last_request(driver_request);
2027 reg_free_request(driver_request);
2032 static enum reg_request_treatment
2033 __reg_process_hint_country_ie(struct wiphy *wiphy,
2034 struct regulatory_request *country_ie_request)
2036 struct wiphy *last_wiphy = NULL;
2037 struct regulatory_request *lr = get_last_request();
2039 if (reg_request_cell_base(lr)) {
2040 /* Trust a Cell base station over the AP's country IE */
2041 if (regdom_changes(country_ie_request->alpha2))
2042 return REG_REQ_IGNORE;
2043 return REG_REQ_ALREADY_SET;
2045 if (wiphy->regulatory_flags & REGULATORY_COUNTRY_IE_IGNORE)
2046 return REG_REQ_IGNORE;
2049 if (unlikely(!is_an_alpha2(country_ie_request->alpha2)))
2052 if (lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE)
2055 last_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx);
2057 if (last_wiphy != wiphy) {
2059 * Two cards with two APs claiming different
2060 * Country IE alpha2s. We could
2061 * intersect them, but that seems unlikely
2062 * to be correct. Reject second one for now.
2064 if (regdom_changes(country_ie_request->alpha2))
2065 return REG_REQ_IGNORE;
2066 return REG_REQ_ALREADY_SET;
2069 if (regdom_changes(country_ie_request->alpha2))
2071 return REG_REQ_ALREADY_SET;
2075 * reg_process_hint_country_ie - process regulatory requests from country IEs
2076 * @country_ie_request: a regulatory request from a country IE
2078 * The wireless subsystem can use this function to process
2079 * a regulatory request issued by a country Information Element.
2081 * Returns one of the different reg request treatment values.
2083 static enum reg_request_treatment
2084 reg_process_hint_country_ie(struct wiphy *wiphy,
2085 struct regulatory_request *country_ie_request)
2087 enum reg_request_treatment treatment;
2089 treatment = __reg_process_hint_country_ie(wiphy, country_ie_request);
2091 switch (treatment) {
2094 case REG_REQ_IGNORE:
2096 case REG_REQ_ALREADY_SET:
2097 reg_free_request(country_ie_request);
2099 case REG_REQ_INTERSECT:
2100 reg_free_request(country_ie_request);
2102 * This doesn't happen yet, not sure we
2103 * ever want to support it for this case.
2105 WARN_ONCE(1, "Unexpected intersection for country IEs");
2106 return REG_REQ_IGNORE;
2109 country_ie_request->intersect = false;
2110 country_ie_request->processed = false;
2112 if (reg_query_database(country_ie_request))
2113 reg_update_last_request(country_ie_request);
2115 reg_free_request(country_ie_request);
2120 /* This processes *all* regulatory hints */
2121 static void reg_process_hint(struct regulatory_request *reg_request)
2123 struct wiphy *wiphy = NULL;
2124 enum reg_request_treatment treatment;
2126 if (reg_request->wiphy_idx != WIPHY_IDX_INVALID)
2127 wiphy = wiphy_idx_to_wiphy(reg_request->wiphy_idx);
2129 switch (reg_request->initiator) {
2130 case NL80211_REGDOM_SET_BY_CORE:
2131 reg_process_hint_core(reg_request);
2133 case NL80211_REGDOM_SET_BY_USER:
2134 reg_process_hint_user(reg_request);
2136 case NL80211_REGDOM_SET_BY_DRIVER:
2139 treatment = reg_process_hint_driver(wiphy, reg_request);
2141 case NL80211_REGDOM_SET_BY_COUNTRY_IE:
2144 treatment = reg_process_hint_country_ie(wiphy, reg_request);
2147 WARN(1, "invalid initiator %d\n", reg_request->initiator);
2151 /* This is required so that the orig_* parameters are saved.
2152 * NOTE: treatment must be set for any case that reaches here!
2154 if (treatment == REG_REQ_ALREADY_SET && wiphy &&
2155 wiphy->regulatory_flags & REGULATORY_STRICT_REG) {
2156 wiphy_update_regulatory(wiphy, reg_request->initiator);
2157 reg_check_channels();
2163 reg_free_request(reg_request);
2166 static bool reg_only_self_managed_wiphys(void)
2168 struct cfg80211_registered_device *rdev;
2169 struct wiphy *wiphy;
2170 bool self_managed_found = false;
2174 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
2175 wiphy = &rdev->wiphy;
2176 if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED)
2177 self_managed_found = true;
2182 /* make sure at least one self-managed wiphy exists */
2183 return self_managed_found;
2187 * Processes regulatory hints, this is all the NL80211_REGDOM_SET_BY_*
2188 * Regulatory hints come on a first come first serve basis and we
2189 * must process each one atomically.
2191 static void reg_process_pending_hints(void)
2193 struct regulatory_request *reg_request, *lr;
2195 lr = get_last_request();
2197 /* When last_request->processed becomes true this will be rescheduled */
2198 if (lr && !lr->processed) {
2199 reg_process_hint(lr);
2203 spin_lock(®_requests_lock);
2205 if (list_empty(®_requests_list)) {
2206 spin_unlock(®_requests_lock);
2210 reg_request = list_first_entry(®_requests_list,
2211 struct regulatory_request,
2213 list_del_init(®_request->list);
2215 spin_unlock(®_requests_lock);
2217 if (reg_only_self_managed_wiphys()) {
2218 reg_free_request(reg_request);
2222 reg_process_hint(reg_request);
2224 lr = get_last_request();
2226 spin_lock(®_requests_lock);
2227 if (!list_empty(®_requests_list) && lr && lr->processed)
2228 schedule_work(®_work);
2229 spin_unlock(®_requests_lock);
2232 /* Processes beacon hints -- this has nothing to do with country IEs */
2233 static void reg_process_pending_beacon_hints(void)
2235 struct cfg80211_registered_device *rdev;
2236 struct reg_beacon *pending_beacon, *tmp;
2238 /* This goes through the _pending_ beacon list */
2239 spin_lock_bh(®_pending_beacons_lock);
2241 list_for_each_entry_safe(pending_beacon, tmp,
2242 ®_pending_beacons, list) {
2243 list_del_init(&pending_beacon->list);
2245 /* Applies the beacon hint to current wiphys */
2246 list_for_each_entry(rdev, &cfg80211_rdev_list, list)
2247 wiphy_update_new_beacon(&rdev->wiphy, pending_beacon);
2249 /* Remembers the beacon hint for new wiphys or reg changes */
2250 list_add_tail(&pending_beacon->list, ®_beacon_list);
2253 spin_unlock_bh(®_pending_beacons_lock);
2256 static void reg_process_self_managed_hints(void)
2258 struct cfg80211_registered_device *rdev;
2259 struct wiphy *wiphy;
2260 const struct ieee80211_regdomain *tmp;
2261 const struct ieee80211_regdomain *regd;
2262 enum ieee80211_band band;
2263 struct regulatory_request request = {};
2265 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
2266 wiphy = &rdev->wiphy;
2268 spin_lock(®_requests_lock);
2269 regd = rdev->requested_regd;
2270 rdev->requested_regd = NULL;
2271 spin_unlock(®_requests_lock);
2276 tmp = get_wiphy_regdom(wiphy);
2277 rcu_assign_pointer(wiphy->regd, regd);
2278 rcu_free_regdom(tmp);
2280 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
2281 handle_band_custom(wiphy, wiphy->bands[band], regd);
2283 reg_process_ht_flags(wiphy);
2285 request.wiphy_idx = get_wiphy_idx(wiphy);
2286 request.alpha2[0] = regd->alpha2[0];
2287 request.alpha2[1] = regd->alpha2[1];
2288 request.initiator = NL80211_REGDOM_SET_BY_DRIVER;
2290 nl80211_send_wiphy_reg_change_event(&request);
2293 reg_check_channels();
2296 static void reg_todo(struct work_struct *work)
2299 reg_process_pending_hints();
2300 reg_process_pending_beacon_hints();
2301 reg_process_self_managed_hints();
2305 static void queue_regulatory_request(struct regulatory_request *request)
2307 request->alpha2[0] = toupper(request->alpha2[0]);
2308 request->alpha2[1] = toupper(request->alpha2[1]);
2310 spin_lock(®_requests_lock);
2311 list_add_tail(&request->list, ®_requests_list);
2312 spin_unlock(®_requests_lock);
2314 schedule_work(®_work);
2318 * Core regulatory hint -- happens during cfg80211_init()
2319 * and when we restore regulatory settings.
2321 static int regulatory_hint_core(const char *alpha2)
2323 struct regulatory_request *request;
2325 request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL);
2329 request->alpha2[0] = alpha2[0];
2330 request->alpha2[1] = alpha2[1];
2331 request->initiator = NL80211_REGDOM_SET_BY_CORE;
2333 queue_regulatory_request(request);
2339 int regulatory_hint_user(const char *alpha2,
2340 enum nl80211_user_reg_hint_type user_reg_hint_type)
2342 struct regulatory_request *request;
2344 if (WARN_ON(!alpha2))
2347 request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL);
2351 request->wiphy_idx = WIPHY_IDX_INVALID;
2352 request->alpha2[0] = alpha2[0];
2353 request->alpha2[1] = alpha2[1];
2354 request->initiator = NL80211_REGDOM_SET_BY_USER;
2355 request->user_reg_hint_type = user_reg_hint_type;
2357 /* Allow calling CRDA again */
2358 reg_crda_timeouts = 0;
2360 queue_regulatory_request(request);
2365 int regulatory_hint_indoor(bool is_indoor, u32 portid)
2367 spin_lock(®_indoor_lock);
2369 /* It is possible that more than one user space process is trying to
2370 * configure the indoor setting. To handle such cases, clear the indoor
2371 * setting in case that some process does not think that the device
2372 * is operating in an indoor environment. In addition, if a user space
2373 * process indicates that it is controlling the indoor setting, save its
2374 * portid, i.e., make it the owner.
2376 reg_is_indoor = is_indoor;
2377 if (reg_is_indoor) {
2378 if (!reg_is_indoor_portid)
2379 reg_is_indoor_portid = portid;
2381 reg_is_indoor_portid = 0;
2384 spin_unlock(®_indoor_lock);
2387 reg_check_channels();
2392 void regulatory_netlink_notify(u32 portid)
2394 spin_lock(®_indoor_lock);
2396 if (reg_is_indoor_portid != portid) {
2397 spin_unlock(®_indoor_lock);
2401 reg_is_indoor = false;
2402 reg_is_indoor_portid = 0;
2404 spin_unlock(®_indoor_lock);
2406 reg_check_channels();
2410 int regulatory_hint(struct wiphy *wiphy, const char *alpha2)
2412 struct regulatory_request *request;
2414 if (WARN_ON(!alpha2 || !wiphy))
2417 wiphy->regulatory_flags &= ~REGULATORY_CUSTOM_REG;
2419 request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL);
2423 request->wiphy_idx = get_wiphy_idx(wiphy);
2425 request->alpha2[0] = alpha2[0];
2426 request->alpha2[1] = alpha2[1];
2427 request->initiator = NL80211_REGDOM_SET_BY_DRIVER;
2429 /* Allow calling CRDA again */
2430 reg_crda_timeouts = 0;
2432 queue_regulatory_request(request);
2436 EXPORT_SYMBOL(regulatory_hint);
2438 void regulatory_hint_country_ie(struct wiphy *wiphy, enum ieee80211_band band,
2439 const u8 *country_ie, u8 country_ie_len)
2442 enum environment_cap env = ENVIRON_ANY;
2443 struct regulatory_request *request = NULL, *lr;
2445 /* IE len must be evenly divisible by 2 */
2446 if (country_ie_len & 0x01)
2449 if (country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
2452 request = kzalloc(sizeof(*request), GFP_KERNEL);
2456 alpha2[0] = country_ie[0];
2457 alpha2[1] = country_ie[1];
2459 if (country_ie[2] == 'I')
2460 env = ENVIRON_INDOOR;
2461 else if (country_ie[2] == 'O')
2462 env = ENVIRON_OUTDOOR;
2465 lr = get_last_request();
2471 * We will run this only upon a successful connection on cfg80211.
2472 * We leave conflict resolution to the workqueue, where can hold
2475 if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE &&
2476 lr->wiphy_idx != WIPHY_IDX_INVALID)
2479 request->wiphy_idx = get_wiphy_idx(wiphy);
2480 request->alpha2[0] = alpha2[0];
2481 request->alpha2[1] = alpha2[1];
2482 request->initiator = NL80211_REGDOM_SET_BY_COUNTRY_IE;
2483 request->country_ie_env = env;
2485 /* Allow calling CRDA again */
2486 reg_crda_timeouts = 0;
2488 queue_regulatory_request(request);
2495 static void restore_alpha2(char *alpha2, bool reset_user)
2497 /* indicates there is no alpha2 to consider for restoration */
2501 /* The user setting has precedence over the module parameter */
2502 if (is_user_regdom_saved()) {
2503 /* Unless we're asked to ignore it and reset it */
2505 REG_DBG_PRINT("Restoring regulatory settings including user preference\n");
2506 user_alpha2[0] = '9';
2507 user_alpha2[1] = '7';
2510 * If we're ignoring user settings, we still need to
2511 * check the module parameter to ensure we put things
2512 * back as they were for a full restore.
2514 if (!is_world_regdom(ieee80211_regdom)) {
2515 REG_DBG_PRINT("Keeping preference on module parameter ieee80211_regdom: %c%c\n",
2516 ieee80211_regdom[0], ieee80211_regdom[1]);
2517 alpha2[0] = ieee80211_regdom[0];
2518 alpha2[1] = ieee80211_regdom[1];
2521 REG_DBG_PRINT("Restoring regulatory settings while preserving user preference for: %c%c\n",
2522 user_alpha2[0], user_alpha2[1]);
2523 alpha2[0] = user_alpha2[0];
2524 alpha2[1] = user_alpha2[1];
2526 } else if (!is_world_regdom(ieee80211_regdom)) {
2527 REG_DBG_PRINT("Keeping preference on module parameter ieee80211_regdom: %c%c\n",
2528 ieee80211_regdom[0], ieee80211_regdom[1]);
2529 alpha2[0] = ieee80211_regdom[0];
2530 alpha2[1] = ieee80211_regdom[1];
2532 REG_DBG_PRINT("Restoring regulatory settings\n");
2535 static void restore_custom_reg_settings(struct wiphy *wiphy)
2537 struct ieee80211_supported_band *sband;
2538 enum ieee80211_band band;
2539 struct ieee80211_channel *chan;
2542 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
2543 sband = wiphy->bands[band];
2546 for (i = 0; i < sband->n_channels; i++) {
2547 chan = &sband->channels[i];
2548 chan->flags = chan->orig_flags;
2549 chan->max_antenna_gain = chan->orig_mag;
2550 chan->max_power = chan->orig_mpwr;
2551 chan->beacon_found = false;
2557 * Restoring regulatory settings involves ingoring any
2558 * possibly stale country IE information and user regulatory
2559 * settings if so desired, this includes any beacon hints
2560 * learned as we could have traveled outside to another country
2561 * after disconnection. To restore regulatory settings we do
2562 * exactly what we did at bootup:
2564 * - send a core regulatory hint
2565 * - send a user regulatory hint if applicable
2567 * Device drivers that send a regulatory hint for a specific country
2568 * keep their own regulatory domain on wiphy->regd so that does does
2569 * not need to be remembered.
2571 static void restore_regulatory_settings(bool reset_user)
2574 char world_alpha2[2];
2575 struct reg_beacon *reg_beacon, *btmp;
2576 LIST_HEAD(tmp_reg_req_list);
2577 struct cfg80211_registered_device *rdev;
2582 * Clear the indoor setting in case that it is not controlled by user
2583 * space, as otherwise there is no guarantee that the device is still
2584 * operating in an indoor environment.
2586 spin_lock(®_indoor_lock);
2587 if (reg_is_indoor && !reg_is_indoor_portid) {
2588 reg_is_indoor = false;
2589 reg_check_channels();
2591 spin_unlock(®_indoor_lock);
2593 reset_regdomains(true, &world_regdom);
2594 restore_alpha2(alpha2, reset_user);
2597 * If there's any pending requests we simply
2598 * stash them to a temporary pending queue and
2599 * add then after we've restored regulatory
2602 spin_lock(®_requests_lock);
2603 list_splice_tail_init(®_requests_list, &tmp_reg_req_list);
2604 spin_unlock(®_requests_lock);
2606 /* Clear beacon hints */
2607 spin_lock_bh(®_pending_beacons_lock);
2608 list_for_each_entry_safe(reg_beacon, btmp, ®_pending_beacons, list) {
2609 list_del(®_beacon->list);
2612 spin_unlock_bh(®_pending_beacons_lock);
2614 list_for_each_entry_safe(reg_beacon, btmp, ®_beacon_list, list) {
2615 list_del(®_beacon->list);
2619 /* First restore to the basic regulatory settings */
2620 world_alpha2[0] = cfg80211_world_regdom->alpha2[0];
2621 world_alpha2[1] = cfg80211_world_regdom->alpha2[1];
2623 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
2624 if (rdev->wiphy.regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED)
2626 if (rdev->wiphy.regulatory_flags & REGULATORY_CUSTOM_REG)
2627 restore_custom_reg_settings(&rdev->wiphy);
2630 regulatory_hint_core(world_alpha2);
2633 * This restores the ieee80211_regdom module parameter
2634 * preference or the last user requested regulatory
2635 * settings, user regulatory settings takes precedence.
2637 if (is_an_alpha2(alpha2))
2638 regulatory_hint_user(alpha2, NL80211_USER_REG_HINT_USER);
2640 spin_lock(®_requests_lock);
2641 list_splice_tail_init(&tmp_reg_req_list, ®_requests_list);
2642 spin_unlock(®_requests_lock);
2644 REG_DBG_PRINT("Kicking the queue\n");
2646 schedule_work(®_work);
2649 void regulatory_hint_disconnect(void)
2651 REG_DBG_PRINT("All devices are disconnected, going to restore regulatory settings\n");
2652 restore_regulatory_settings(false);
2655 static bool freq_is_chan_12_13_14(u16 freq)
2657 if (freq == ieee80211_channel_to_frequency(12, IEEE80211_BAND_2GHZ) ||
2658 freq == ieee80211_channel_to_frequency(13, IEEE80211_BAND_2GHZ) ||
2659 freq == ieee80211_channel_to_frequency(14, IEEE80211_BAND_2GHZ))
2664 static bool pending_reg_beacon(struct ieee80211_channel *beacon_chan)
2666 struct reg_beacon *pending_beacon;
2668 list_for_each_entry(pending_beacon, ®_pending_beacons, list)
2669 if (beacon_chan->center_freq ==
2670 pending_beacon->chan.center_freq)
2675 int regulatory_hint_found_beacon(struct wiphy *wiphy,
2676 struct ieee80211_channel *beacon_chan,
2679 struct reg_beacon *reg_beacon;
2682 if (beacon_chan->beacon_found ||
2683 beacon_chan->flags & IEEE80211_CHAN_RADAR ||
2684 (beacon_chan->band == IEEE80211_BAND_2GHZ &&
2685 !freq_is_chan_12_13_14(beacon_chan->center_freq)))
2688 spin_lock_bh(®_pending_beacons_lock);
2689 processing = pending_reg_beacon(beacon_chan);
2690 spin_unlock_bh(®_pending_beacons_lock);
2695 reg_beacon = kzalloc(sizeof(struct reg_beacon), gfp);
2699 REG_DBG_PRINT("Found new beacon on frequency: %d MHz (Ch %d) on %s\n",
2700 beacon_chan->center_freq,
2701 ieee80211_frequency_to_channel(beacon_chan->center_freq),
2704 memcpy(®_beacon->chan, beacon_chan,
2705 sizeof(struct ieee80211_channel));
2708 * Since we can be called from BH or and non-BH context
2709 * we must use spin_lock_bh()
2711 spin_lock_bh(®_pending_beacons_lock);
2712 list_add_tail(®_beacon->list, ®_pending_beacons);
2713 spin_unlock_bh(®_pending_beacons_lock);
2715 schedule_work(®_work);
2720 static void print_rd_rules(const struct ieee80211_regdomain *rd)
2723 const struct ieee80211_reg_rule *reg_rule = NULL;
2724 const struct ieee80211_freq_range *freq_range = NULL;
2725 const struct ieee80211_power_rule *power_rule = NULL;
2726 char bw[32], cac_time[32];
2728 pr_info(" (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp), (dfs_cac_time)\n");
2730 for (i = 0; i < rd->n_reg_rules; i++) {
2731 reg_rule = &rd->reg_rules[i];
2732 freq_range = ®_rule->freq_range;
2733 power_rule = ®_rule->power_rule;
2735 if (reg_rule->flags & NL80211_RRF_AUTO_BW)
2736 snprintf(bw, sizeof(bw), "%d KHz, %d KHz AUTO",
2737 freq_range->max_bandwidth_khz,
2738 reg_get_max_bandwidth(rd, reg_rule));
2740 snprintf(bw, sizeof(bw), "%d KHz",
2741 freq_range->max_bandwidth_khz);
2743 if (reg_rule->flags & NL80211_RRF_DFS)
2744 scnprintf(cac_time, sizeof(cac_time), "%u s",
2745 reg_rule->dfs_cac_ms/1000);
2747 scnprintf(cac_time, sizeof(cac_time), "N/A");
2751 * There may not be documentation for max antenna gain
2752 * in certain regions
2754 if (power_rule->max_antenna_gain)
2755 pr_info(" (%d KHz - %d KHz @ %s), (%d mBi, %d mBm), (%s)\n",
2756 freq_range->start_freq_khz,
2757 freq_range->end_freq_khz,
2759 power_rule->max_antenna_gain,
2760 power_rule->max_eirp,
2763 pr_info(" (%d KHz - %d KHz @ %s), (N/A, %d mBm), (%s)\n",
2764 freq_range->start_freq_khz,
2765 freq_range->end_freq_khz,
2767 power_rule->max_eirp,
2772 bool reg_supported_dfs_region(enum nl80211_dfs_regions dfs_region)
2774 switch (dfs_region) {
2775 case NL80211_DFS_UNSET:
2776 case NL80211_DFS_FCC:
2777 case NL80211_DFS_ETSI:
2778 case NL80211_DFS_JP:
2781 REG_DBG_PRINT("Ignoring uknown DFS master region: %d\n",
2787 static void print_regdomain(const struct ieee80211_regdomain *rd)
2789 struct regulatory_request *lr = get_last_request();
2791 if (is_intersected_alpha2(rd->alpha2)) {
2792 if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) {
2793 struct cfg80211_registered_device *rdev;
2794 rdev = cfg80211_rdev_by_wiphy_idx(lr->wiphy_idx);
2796 pr_info("Current regulatory domain updated by AP to: %c%c\n",
2797 rdev->country_ie_alpha2[0],
2798 rdev->country_ie_alpha2[1]);
2800 pr_info("Current regulatory domain intersected:\n");
2802 pr_info("Current regulatory domain intersected:\n");
2803 } else if (is_world_regdom(rd->alpha2)) {
2804 pr_info("World regulatory domain updated:\n");
2806 if (is_unknown_alpha2(rd->alpha2))
2807 pr_info("Regulatory domain changed to driver built-in settings (unknown country)\n");
2809 if (reg_request_cell_base(lr))
2810 pr_info("Regulatory domain changed to country: %c%c by Cell Station\n",
2811 rd->alpha2[0], rd->alpha2[1]);
2813 pr_info("Regulatory domain changed to country: %c%c\n",
2814 rd->alpha2[0], rd->alpha2[1]);
2818 pr_info(" DFS Master region: %s", reg_dfs_region_str(rd->dfs_region));
2822 static void print_regdomain_info(const struct ieee80211_regdomain *rd)
2824 pr_info("Regulatory domain: %c%c\n", rd->alpha2[0], rd->alpha2[1]);
2828 static int reg_set_rd_core(const struct ieee80211_regdomain *rd)
2830 if (!is_world_regdom(rd->alpha2))
2832 update_world_regdomain(rd);
2836 static int reg_set_rd_user(const struct ieee80211_regdomain *rd,
2837 struct regulatory_request *user_request)
2839 const struct ieee80211_regdomain *intersected_rd = NULL;
2841 if (!regdom_changes(rd->alpha2))
2844 if (!is_valid_rd(rd)) {
2845 pr_err("Invalid regulatory domain detected:\n");
2846 print_regdomain_info(rd);
2850 if (!user_request->intersect) {
2851 reset_regdomains(false, rd);
2855 intersected_rd = regdom_intersect(rd, get_cfg80211_regdom());
2856 if (!intersected_rd)
2861 reset_regdomains(false, intersected_rd);
2866 static int reg_set_rd_driver(const struct ieee80211_regdomain *rd,
2867 struct regulatory_request *driver_request)
2869 const struct ieee80211_regdomain *regd;
2870 const struct ieee80211_regdomain *intersected_rd = NULL;
2871 const struct ieee80211_regdomain *tmp;
2872 struct wiphy *request_wiphy;
2874 if (is_world_regdom(rd->alpha2))
2877 if (!regdom_changes(rd->alpha2))
2880 if (!is_valid_rd(rd)) {
2881 pr_err("Invalid regulatory domain detected:\n");
2882 print_regdomain_info(rd);
2886 request_wiphy = wiphy_idx_to_wiphy(driver_request->wiphy_idx);
2890 if (!driver_request->intersect) {
2891 if (request_wiphy->regd)
2894 regd = reg_copy_regd(rd);
2896 return PTR_ERR(regd);
2898 rcu_assign_pointer(request_wiphy->regd, regd);
2899 reset_regdomains(false, rd);
2903 intersected_rd = regdom_intersect(rd, get_cfg80211_regdom());
2904 if (!intersected_rd)
2908 * We can trash what CRDA provided now.
2909 * However if a driver requested this specific regulatory
2910 * domain we keep it for its private use
2912 tmp = get_wiphy_regdom(request_wiphy);
2913 rcu_assign_pointer(request_wiphy->regd, rd);
2914 rcu_free_regdom(tmp);
2918 reset_regdomains(false, intersected_rd);
2923 static int reg_set_rd_country_ie(const struct ieee80211_regdomain *rd,
2924 struct regulatory_request *country_ie_request)
2926 struct wiphy *request_wiphy;
2928 if (!is_alpha2_set(rd->alpha2) && !is_an_alpha2(rd->alpha2) &&
2929 !is_unknown_alpha2(rd->alpha2))
2933 * Lets only bother proceeding on the same alpha2 if the current
2934 * rd is non static (it means CRDA was present and was used last)
2935 * and the pending request came in from a country IE
2938 if (!is_valid_rd(rd)) {
2939 pr_err("Invalid regulatory domain detected:\n");
2940 print_regdomain_info(rd);
2944 request_wiphy = wiphy_idx_to_wiphy(country_ie_request->wiphy_idx);
2948 if (country_ie_request->intersect)
2951 reset_regdomains(false, rd);
2956 * Use this call to set the current regulatory domain. Conflicts with
2957 * multiple drivers can be ironed out later. Caller must've already
2958 * kmalloc'd the rd structure.
2960 int set_regdom(const struct ieee80211_regdomain *rd,
2961 enum ieee80211_regd_source regd_src)
2963 struct regulatory_request *lr;
2964 bool user_reset = false;
2967 if (!reg_is_valid_request(rd->alpha2)) {
2972 if (regd_src == REGD_SOURCE_CRDA)
2973 reg_crda_timeouts = 0;
2975 lr = get_last_request();
2977 /* Note that this doesn't update the wiphys, this is done below */
2978 switch (lr->initiator) {
2979 case NL80211_REGDOM_SET_BY_CORE:
2980 r = reg_set_rd_core(rd);
2982 case NL80211_REGDOM_SET_BY_USER:
2983 r = reg_set_rd_user(rd, lr);
2986 case NL80211_REGDOM_SET_BY_DRIVER:
2987 r = reg_set_rd_driver(rd, lr);
2989 case NL80211_REGDOM_SET_BY_COUNTRY_IE:
2990 r = reg_set_rd_country_ie(rd, lr);
2993 WARN(1, "invalid initiator %d\n", lr->initiator);
3000 reg_set_request_processed();
3003 /* Back to world regulatory in case of errors */
3004 restore_regulatory_settings(user_reset);
3011 /* This would make this whole thing pointless */
3012 if (WARN_ON(!lr->intersect && rd != get_cfg80211_regdom()))
3015 /* update all wiphys now with the new established regulatory domain */
3016 update_all_wiphy_regulatory(lr->initiator);
3018 print_regdomain(get_cfg80211_regdom());
3020 nl80211_send_reg_change_event(lr);
3022 reg_set_request_processed();
3027 static int __regulatory_set_wiphy_regd(struct wiphy *wiphy,
3028 struct ieee80211_regdomain *rd)
3030 const struct ieee80211_regdomain *regd;
3031 const struct ieee80211_regdomain *prev_regd;
3032 struct cfg80211_registered_device *rdev;
3034 if (WARN_ON(!wiphy || !rd))
3037 if (WARN(!(wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED),
3038 "wiphy should have REGULATORY_WIPHY_SELF_MANAGED\n"))
3041 if (WARN(!is_valid_rd(rd), "Invalid regulatory domain detected\n")) {
3042 print_regdomain_info(rd);
3046 regd = reg_copy_regd(rd);
3048 return PTR_ERR(regd);
3050 rdev = wiphy_to_rdev(wiphy);
3052 spin_lock(®_requests_lock);
3053 prev_regd = rdev->requested_regd;
3054 rdev->requested_regd = regd;
3055 spin_unlock(®_requests_lock);
3061 int regulatory_set_wiphy_regd(struct wiphy *wiphy,
3062 struct ieee80211_regdomain *rd)
3064 int ret = __regulatory_set_wiphy_regd(wiphy, rd);
3069 schedule_work(®_work);
3072 EXPORT_SYMBOL(regulatory_set_wiphy_regd);
3074 int regulatory_set_wiphy_regd_sync_rtnl(struct wiphy *wiphy,
3075 struct ieee80211_regdomain *rd)
3081 ret = __regulatory_set_wiphy_regd(wiphy, rd);
3085 /* process the request immediately */
3086 reg_process_self_managed_hints();
3089 EXPORT_SYMBOL(regulatory_set_wiphy_regd_sync_rtnl);
3091 void wiphy_regulatory_register(struct wiphy *wiphy)
3093 struct regulatory_request *lr;
3095 /* self-managed devices ignore external hints */
3096 if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED)
3097 wiphy->regulatory_flags |= REGULATORY_DISABLE_BEACON_HINTS |
3098 REGULATORY_COUNTRY_IE_IGNORE;
3100 if (!reg_dev_ignore_cell_hint(wiphy))
3101 reg_num_devs_support_basehint++;
3103 lr = get_last_request();
3104 wiphy_update_regulatory(wiphy, lr->initiator);
3107 void wiphy_regulatory_deregister(struct wiphy *wiphy)
3109 struct wiphy *request_wiphy = NULL;
3110 struct regulatory_request *lr;
3112 lr = get_last_request();
3114 if (!reg_dev_ignore_cell_hint(wiphy))
3115 reg_num_devs_support_basehint--;
3117 rcu_free_regdom(get_wiphy_regdom(wiphy));
3118 RCU_INIT_POINTER(wiphy->regd, NULL);
3121 request_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx);
3123 if (!request_wiphy || request_wiphy != wiphy)
3126 lr->wiphy_idx = WIPHY_IDX_INVALID;
3127 lr->country_ie_env = ENVIRON_ANY;
3130 static void reg_timeout_work(struct work_struct *work)
3132 REG_DBG_PRINT("Timeout while waiting for CRDA to reply, restoring regulatory settings\n");
3134 reg_crda_timeouts++;
3135 restore_regulatory_settings(true);
3140 * See http://www.fcc.gov/document/5-ghz-unlicensed-spectrum-unii, for
3141 * UNII band definitions
3143 int cfg80211_get_unii(int freq)
3146 if (freq >= 5150 && freq <= 5250)
3150 if (freq > 5250 && freq <= 5350)
3154 if (freq > 5350 && freq <= 5470)
3158 if (freq > 5470 && freq <= 5725)
3162 if (freq > 5725 && freq <= 5825)
3168 bool regulatory_indoor_allowed(void)
3170 return reg_is_indoor;
3173 int __init regulatory_init(void)
3177 reg_pdev = platform_device_register_simple("regulatory", 0, NULL, 0);
3178 if (IS_ERR(reg_pdev))
3179 return PTR_ERR(reg_pdev);
3181 spin_lock_init(®_requests_lock);
3182 spin_lock_init(®_pending_beacons_lock);
3183 spin_lock_init(®_indoor_lock);
3185 reg_regdb_size_check();
3187 rcu_assign_pointer(cfg80211_regdomain, cfg80211_world_regdom);
3189 user_alpha2[0] = '9';
3190 user_alpha2[1] = '7';
3192 /* We always try to get an update for the static regdomain */
3193 err = regulatory_hint_core(cfg80211_world_regdom->alpha2);
3198 * N.B. kobject_uevent_env() can fail mainly for when we're out
3199 * memory which is handled and propagated appropriately above
3200 * but it can also fail during a netlink_broadcast() or during
3201 * early boot for call_usermodehelper(). For now treat these
3202 * errors as non-fatal.
3204 pr_err("kobject_uevent_env() was unable to call CRDA during init\n");
3208 * Finally, if the user set the module parameter treat it
3211 if (!is_world_regdom(ieee80211_regdom))
3212 regulatory_hint_user(ieee80211_regdom,
3213 NL80211_USER_REG_HINT_USER);
3218 void regulatory_exit(void)
3220 struct regulatory_request *reg_request, *tmp;
3221 struct reg_beacon *reg_beacon, *btmp;
3223 cancel_work_sync(®_work);
3224 cancel_delayed_work_sync(®_timeout);
3225 cancel_delayed_work_sync(®_check_chans);
3227 /* Lock to suppress warnings */
3229 reset_regdomains(true, NULL);
3232 dev_set_uevent_suppress(®_pdev->dev, true);
3234 platform_device_unregister(reg_pdev);
3236 list_for_each_entry_safe(reg_beacon, btmp, ®_pending_beacons, list) {
3237 list_del(®_beacon->list);
3241 list_for_each_entry_safe(reg_beacon, btmp, ®_beacon_list, list) {
3242 list_del(®_beacon->list);
3246 list_for_each_entry_safe(reg_request, tmp, ®_requests_list, list) {
3247 list_del(®_request->list);