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 static void restore_regulatory_settings(bool reset_user);
140 static const struct ieee80211_regdomain *get_cfg80211_regdom(void)
142 return rtnl_dereference(cfg80211_regdomain);
145 const struct ieee80211_regdomain *get_wiphy_regdom(struct wiphy *wiphy)
147 return rtnl_dereference(wiphy->regd);
150 static const char *reg_dfs_region_str(enum nl80211_dfs_regions dfs_region)
152 switch (dfs_region) {
153 case NL80211_DFS_UNSET:
155 case NL80211_DFS_FCC:
157 case NL80211_DFS_ETSI:
165 enum nl80211_dfs_regions reg_get_dfs_region(struct wiphy *wiphy)
167 const struct ieee80211_regdomain *regd = NULL;
168 const struct ieee80211_regdomain *wiphy_regd = NULL;
170 regd = get_cfg80211_regdom();
174 wiphy_regd = get_wiphy_regdom(wiphy);
178 if (wiphy_regd->dfs_region == regd->dfs_region)
181 REG_DBG_PRINT("%s: device specific dfs_region "
182 "(%s) disagrees with cfg80211's "
183 "central dfs_region (%s)\n",
184 dev_name(&wiphy->dev),
185 reg_dfs_region_str(wiphy_regd->dfs_region),
186 reg_dfs_region_str(regd->dfs_region));
189 return regd->dfs_region;
192 static void rcu_free_regdom(const struct ieee80211_regdomain *r)
196 kfree_rcu((struct ieee80211_regdomain *)r, rcu_head);
199 static struct regulatory_request *get_last_request(void)
201 return rcu_dereference_rtnl(last_request);
204 /* Used to queue up regulatory hints */
205 static LIST_HEAD(reg_requests_list);
206 static spinlock_t reg_requests_lock;
208 /* Used to queue up beacon hints for review */
209 static LIST_HEAD(reg_pending_beacons);
210 static spinlock_t reg_pending_beacons_lock;
212 /* Used to keep track of processed beacon hints */
213 static LIST_HEAD(reg_beacon_list);
216 struct list_head list;
217 struct ieee80211_channel chan;
220 static void reg_check_chans_work(struct work_struct *work);
221 static DECLARE_DELAYED_WORK(reg_check_chans, reg_check_chans_work);
223 static void reg_todo(struct work_struct *work);
224 static DECLARE_WORK(reg_work, reg_todo);
226 /* We keep a static world regulatory domain in case of the absence of CRDA */
227 static const struct ieee80211_regdomain world_regdom = {
231 /* IEEE 802.11b/g, channels 1..11 */
232 REG_RULE(2412-10, 2462+10, 40, 6, 20, 0),
233 /* IEEE 802.11b/g, channels 12..13. */
234 REG_RULE(2467-10, 2472+10, 40, 6, 20,
236 /* IEEE 802.11 channel 14 - Only JP enables
237 * this and for 802.11b only */
238 REG_RULE(2484-10, 2484+10, 20, 6, 20,
240 NL80211_RRF_NO_OFDM),
241 /* IEEE 802.11a, channel 36..48 */
242 REG_RULE(5180-10, 5240+10, 160, 6, 20,
245 /* IEEE 802.11a, channel 52..64 - DFS required */
246 REG_RULE(5260-10, 5320+10, 160, 6, 20,
250 /* IEEE 802.11a, channel 100..144 - DFS required */
251 REG_RULE(5500-10, 5720+10, 160, 6, 20,
255 /* IEEE 802.11a, channel 149..165 */
256 REG_RULE(5745-10, 5825+10, 80, 6, 20,
259 /* IEEE 802.11ad (60GHz), channels 1..3 */
260 REG_RULE(56160+2160*1-1080, 56160+2160*3+1080, 2160, 0, 0, 0),
264 /* protected by RTNL */
265 static const struct ieee80211_regdomain *cfg80211_world_regdom =
268 static char *ieee80211_regdom = "00";
269 static char user_alpha2[2];
271 module_param(ieee80211_regdom, charp, 0444);
272 MODULE_PARM_DESC(ieee80211_regdom, "IEEE 802.11 regulatory domain code");
274 static void reg_free_request(struct regulatory_request *request)
276 if (request != get_last_request())
280 static void reg_free_last_request(void)
282 struct regulatory_request *lr = get_last_request();
284 if (lr != &core_request_world && lr)
285 kfree_rcu(lr, rcu_head);
288 static void reg_update_last_request(struct regulatory_request *request)
290 struct regulatory_request *lr;
292 lr = get_last_request();
296 reg_free_last_request();
297 rcu_assign_pointer(last_request, request);
300 static void reset_regdomains(bool full_reset,
301 const struct ieee80211_regdomain *new_regdom)
303 const struct ieee80211_regdomain *r;
307 r = get_cfg80211_regdom();
309 /* avoid freeing static information or freeing something twice */
310 if (r == cfg80211_world_regdom)
312 if (cfg80211_world_regdom == &world_regdom)
313 cfg80211_world_regdom = NULL;
314 if (r == &world_regdom)
318 rcu_free_regdom(cfg80211_world_regdom);
320 cfg80211_world_regdom = &world_regdom;
321 rcu_assign_pointer(cfg80211_regdomain, new_regdom);
326 reg_update_last_request(&core_request_world);
330 * Dynamic world regulatory domain requested by the wireless
331 * core upon initialization
333 static void update_world_regdomain(const struct ieee80211_regdomain *rd)
335 struct regulatory_request *lr;
337 lr = get_last_request();
341 reset_regdomains(false, rd);
343 cfg80211_world_regdom = rd;
346 bool is_world_regdom(const char *alpha2)
350 return alpha2[0] == '0' && alpha2[1] == '0';
353 static bool is_alpha2_set(const char *alpha2)
357 return alpha2[0] && alpha2[1];
360 static bool is_unknown_alpha2(const char *alpha2)
365 * Special case where regulatory domain was built by driver
366 * but a specific alpha2 cannot be determined
368 return alpha2[0] == '9' && alpha2[1] == '9';
371 static bool is_intersected_alpha2(const char *alpha2)
376 * Special case where regulatory domain is the
377 * result of an intersection between two regulatory domain
380 return alpha2[0] == '9' && alpha2[1] == '8';
383 static bool is_an_alpha2(const char *alpha2)
387 return isalpha(alpha2[0]) && isalpha(alpha2[1]);
390 static bool alpha2_equal(const char *alpha2_x, const char *alpha2_y)
392 if (!alpha2_x || !alpha2_y)
394 return alpha2_x[0] == alpha2_y[0] && alpha2_x[1] == alpha2_y[1];
397 static bool regdom_changes(const char *alpha2)
399 const struct ieee80211_regdomain *r = get_cfg80211_regdom();
403 return !alpha2_equal(r->alpha2, alpha2);
407 * The NL80211_REGDOM_SET_BY_USER regdom alpha2 is cached, this lets
408 * you know if a valid regulatory hint with NL80211_REGDOM_SET_BY_USER
409 * has ever been issued.
411 static bool is_user_regdom_saved(void)
413 if (user_alpha2[0] == '9' && user_alpha2[1] == '7')
416 /* This would indicate a mistake on the design */
417 if (WARN(!is_world_regdom(user_alpha2) && !is_an_alpha2(user_alpha2),
418 "Unexpected user alpha2: %c%c\n",
419 user_alpha2[0], user_alpha2[1]))
425 static const struct ieee80211_regdomain *
426 reg_copy_regd(const struct ieee80211_regdomain *src_regd)
428 struct ieee80211_regdomain *regd;
433 sizeof(struct ieee80211_regdomain) +
434 src_regd->n_reg_rules * sizeof(struct ieee80211_reg_rule);
436 regd = kzalloc(size_of_regd, GFP_KERNEL);
438 return ERR_PTR(-ENOMEM);
440 memcpy(regd, src_regd, sizeof(struct ieee80211_regdomain));
442 for (i = 0; i < src_regd->n_reg_rules; i++)
443 memcpy(®d->reg_rules[i], &src_regd->reg_rules[i],
444 sizeof(struct ieee80211_reg_rule));
449 #ifdef CONFIG_CFG80211_INTERNAL_REGDB
450 struct reg_regdb_apply_request {
451 struct list_head list;
452 const struct ieee80211_regdomain *regdom;
455 static LIST_HEAD(reg_regdb_apply_list);
456 static DEFINE_MUTEX(reg_regdb_apply_mutex);
458 static void reg_regdb_apply(struct work_struct *work)
460 struct reg_regdb_apply_request *request;
464 mutex_lock(®_regdb_apply_mutex);
465 while (!list_empty(®_regdb_apply_list)) {
466 request = list_first_entry(®_regdb_apply_list,
467 struct reg_regdb_apply_request,
469 list_del(&request->list);
471 set_regdom(request->regdom, REGD_SOURCE_INTERNAL_DB);
474 mutex_unlock(®_regdb_apply_mutex);
479 static DECLARE_WORK(reg_regdb_work, reg_regdb_apply);
481 static int reg_regdb_query(const char *alpha2)
483 const struct ieee80211_regdomain *regdom = NULL;
484 struct reg_regdb_apply_request *request;
487 for (i = 0; i < reg_regdb_size; i++) {
488 if (alpha2_equal(alpha2, reg_regdb[i]->alpha2)) {
489 regdom = reg_regdb[i];
497 request = kzalloc(sizeof(struct reg_regdb_apply_request), GFP_KERNEL);
501 request->regdom = reg_copy_regd(regdom);
502 if (IS_ERR_OR_NULL(request->regdom)) {
507 mutex_lock(®_regdb_apply_mutex);
508 list_add_tail(&request->list, ®_regdb_apply_list);
509 mutex_unlock(®_regdb_apply_mutex);
511 schedule_work(®_regdb_work);
516 /* Feel free to add any other sanity checks here */
517 static void reg_regdb_size_check(void)
519 /* We should ideally BUILD_BUG_ON() but then random builds would fail */
520 WARN_ONCE(!reg_regdb_size, "db.txt is empty, you should update it...");
523 static inline void reg_regdb_size_check(void) {}
524 static inline int reg_regdb_query(const char *alpha2)
528 #endif /* CONFIG_CFG80211_INTERNAL_REGDB */
530 #ifdef CONFIG_CFG80211_CRDA_SUPPORT
531 /* Max number of consecutive attempts to communicate with CRDA */
532 #define REG_MAX_CRDA_TIMEOUTS 10
534 static u32 reg_crda_timeouts;
536 static void crda_timeout_work(struct work_struct *work);
537 static DECLARE_DELAYED_WORK(crda_timeout, crda_timeout_work);
539 static void crda_timeout_work(struct work_struct *work)
541 REG_DBG_PRINT("Timeout while waiting for CRDA to reply, restoring regulatory settings\n");
544 restore_regulatory_settings(true);
548 static void cancel_crda_timeout(void)
550 cancel_delayed_work(&crda_timeout);
553 static void cancel_crda_timeout_sync(void)
555 cancel_delayed_work_sync(&crda_timeout);
558 static void reset_crda_timeouts(void)
560 reg_crda_timeouts = 0;
564 * This lets us keep regulatory code which is updated on a regulatory
565 * basis in userspace.
567 static int call_crda(const char *alpha2)
570 char *env[] = { country, NULL };
573 snprintf(country, sizeof(country), "COUNTRY=%c%c",
574 alpha2[0], alpha2[1]);
576 if (reg_crda_timeouts > REG_MAX_CRDA_TIMEOUTS) {
577 pr_debug("Exceeded CRDA call max attempts. Not calling CRDA\n");
581 if (!is_world_regdom((char *) alpha2))
582 pr_debug("Calling CRDA for country: %c%c\n",
583 alpha2[0], alpha2[1]);
585 pr_debug("Calling CRDA to update world regulatory domain\n");
587 ret = kobject_uevent_env(®_pdev->dev.kobj, KOBJ_CHANGE, env);
591 queue_delayed_work(system_power_efficient_wq,
592 &crda_timeout, msecs_to_jiffies(3142));
596 static inline void cancel_crda_timeout(void) {}
597 static inline void cancel_crda_timeout_sync(void) {}
598 static inline void reset_crda_timeouts(void) {}
599 static inline int call_crda(const char *alpha2)
603 #endif /* CONFIG_CFG80211_CRDA_SUPPORT */
605 static bool reg_query_database(struct regulatory_request *request)
607 /* query internal regulatory database (if it exists) */
608 if (reg_regdb_query(request->alpha2) == 0)
611 if (call_crda(request->alpha2) == 0)
617 bool reg_is_valid_request(const char *alpha2)
619 struct regulatory_request *lr = get_last_request();
621 if (!lr || lr->processed)
624 return alpha2_equal(lr->alpha2, alpha2);
627 static const struct ieee80211_regdomain *reg_get_regdomain(struct wiphy *wiphy)
629 struct regulatory_request *lr = get_last_request();
632 * Follow the driver's regulatory domain, if present, unless a country
633 * IE has been processed or a user wants to help complaince further
635 if (lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE &&
636 lr->initiator != NL80211_REGDOM_SET_BY_USER &&
638 return get_wiphy_regdom(wiphy);
640 return get_cfg80211_regdom();
644 reg_get_max_bandwidth_from_range(const struct ieee80211_regdomain *rd,
645 const struct ieee80211_reg_rule *rule)
647 const struct ieee80211_freq_range *freq_range = &rule->freq_range;
648 const struct ieee80211_freq_range *freq_range_tmp;
649 const struct ieee80211_reg_rule *tmp;
650 u32 start_freq, end_freq, idx, no;
652 for (idx = 0; idx < rd->n_reg_rules; idx++)
653 if (rule == &rd->reg_rules[idx])
656 if (idx == rd->n_reg_rules)
663 tmp = &rd->reg_rules[--no];
664 freq_range_tmp = &tmp->freq_range;
666 if (freq_range_tmp->end_freq_khz < freq_range->start_freq_khz)
669 freq_range = freq_range_tmp;
672 start_freq = freq_range->start_freq_khz;
675 freq_range = &rule->freq_range;
678 while (no < rd->n_reg_rules - 1) {
679 tmp = &rd->reg_rules[++no];
680 freq_range_tmp = &tmp->freq_range;
682 if (freq_range_tmp->start_freq_khz > freq_range->end_freq_khz)
685 freq_range = freq_range_tmp;
688 end_freq = freq_range->end_freq_khz;
690 return end_freq - start_freq;
693 unsigned int reg_get_max_bandwidth(const struct ieee80211_regdomain *rd,
694 const struct ieee80211_reg_rule *rule)
696 unsigned int bw = reg_get_max_bandwidth_from_range(rd, rule);
698 if (rule->flags & NL80211_RRF_NO_160MHZ)
699 bw = min_t(unsigned int, bw, MHZ_TO_KHZ(80));
700 if (rule->flags & NL80211_RRF_NO_80MHZ)
701 bw = min_t(unsigned int, bw, MHZ_TO_KHZ(40));
704 * HT40+/HT40- limits are handled per-channel. Only limit BW if both
707 if (rule->flags & NL80211_RRF_NO_HT40MINUS &&
708 rule->flags & NL80211_RRF_NO_HT40PLUS)
709 bw = min_t(unsigned int, bw, MHZ_TO_KHZ(20));
714 /* Sanity check on a regulatory rule */
715 static bool is_valid_reg_rule(const struct ieee80211_reg_rule *rule)
717 const struct ieee80211_freq_range *freq_range = &rule->freq_range;
720 if (freq_range->start_freq_khz <= 0 || freq_range->end_freq_khz <= 0)
723 if (freq_range->start_freq_khz > freq_range->end_freq_khz)
726 freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz;
728 if (freq_range->end_freq_khz <= freq_range->start_freq_khz ||
729 freq_range->max_bandwidth_khz > freq_diff)
735 static bool is_valid_rd(const struct ieee80211_regdomain *rd)
737 const struct ieee80211_reg_rule *reg_rule = NULL;
740 if (!rd->n_reg_rules)
743 if (WARN_ON(rd->n_reg_rules > NL80211_MAX_SUPP_REG_RULES))
746 for (i = 0; i < rd->n_reg_rules; i++) {
747 reg_rule = &rd->reg_rules[i];
748 if (!is_valid_reg_rule(reg_rule))
755 static bool reg_does_bw_fit(const struct ieee80211_freq_range *freq_range,
756 u32 center_freq_khz, u32 bw_khz)
758 u32 start_freq_khz, end_freq_khz;
760 start_freq_khz = center_freq_khz - (bw_khz/2);
761 end_freq_khz = center_freq_khz + (bw_khz/2);
763 if (start_freq_khz >= freq_range->start_freq_khz &&
764 end_freq_khz <= freq_range->end_freq_khz)
771 * freq_in_rule_band - tells us if a frequency is in a frequency band
772 * @freq_range: frequency rule we want to query
773 * @freq_khz: frequency we are inquiring about
775 * This lets us know if a specific frequency rule is or is not relevant to
776 * a specific frequency's band. Bands are device specific and artificial
777 * definitions (the "2.4 GHz band", the "5 GHz band" and the "60GHz band"),
778 * however it is safe for now to assume that a frequency rule should not be
779 * part of a frequency's band if the start freq or end freq are off by more
780 * than 2 GHz for the 2.4 and 5 GHz bands, and by more than 10 GHz for the
782 * This resolution can be lowered and should be considered as we add
783 * regulatory rule support for other "bands".
785 static bool freq_in_rule_band(const struct ieee80211_freq_range *freq_range,
788 #define ONE_GHZ_IN_KHZ 1000000
790 * From 802.11ad: directional multi-gigabit (DMG):
791 * Pertaining to operation in a frequency band containing a channel
792 * with the Channel starting frequency above 45 GHz.
794 u32 limit = freq_khz > 45 * ONE_GHZ_IN_KHZ ?
795 10 * ONE_GHZ_IN_KHZ : 2 * ONE_GHZ_IN_KHZ;
796 if (abs(freq_khz - freq_range->start_freq_khz) <= limit)
798 if (abs(freq_khz - freq_range->end_freq_khz) <= limit)
801 #undef ONE_GHZ_IN_KHZ
805 * Later on we can perhaps use the more restrictive DFS
806 * region but we don't have information for that yet so
807 * for now simply disallow conflicts.
809 static enum nl80211_dfs_regions
810 reg_intersect_dfs_region(const enum nl80211_dfs_regions dfs_region1,
811 const enum nl80211_dfs_regions dfs_region2)
813 if (dfs_region1 != dfs_region2)
814 return NL80211_DFS_UNSET;
819 * Helper for regdom_intersect(), this does the real
820 * mathematical intersection fun
822 static int reg_rules_intersect(const struct ieee80211_regdomain *rd1,
823 const struct ieee80211_regdomain *rd2,
824 const struct ieee80211_reg_rule *rule1,
825 const struct ieee80211_reg_rule *rule2,
826 struct ieee80211_reg_rule *intersected_rule)
828 const struct ieee80211_freq_range *freq_range1, *freq_range2;
829 struct ieee80211_freq_range *freq_range;
830 const struct ieee80211_power_rule *power_rule1, *power_rule2;
831 struct ieee80211_power_rule *power_rule;
832 u32 freq_diff, max_bandwidth1, max_bandwidth2;
834 freq_range1 = &rule1->freq_range;
835 freq_range2 = &rule2->freq_range;
836 freq_range = &intersected_rule->freq_range;
838 power_rule1 = &rule1->power_rule;
839 power_rule2 = &rule2->power_rule;
840 power_rule = &intersected_rule->power_rule;
842 freq_range->start_freq_khz = max(freq_range1->start_freq_khz,
843 freq_range2->start_freq_khz);
844 freq_range->end_freq_khz = min(freq_range1->end_freq_khz,
845 freq_range2->end_freq_khz);
847 max_bandwidth1 = freq_range1->max_bandwidth_khz;
848 max_bandwidth2 = freq_range2->max_bandwidth_khz;
850 if (rule1->flags & NL80211_RRF_AUTO_BW)
851 max_bandwidth1 = reg_get_max_bandwidth(rd1, rule1);
852 if (rule2->flags & NL80211_RRF_AUTO_BW)
853 max_bandwidth2 = reg_get_max_bandwidth(rd2, rule2);
855 freq_range->max_bandwidth_khz = min(max_bandwidth1, max_bandwidth2);
857 intersected_rule->flags = rule1->flags | rule2->flags;
860 * In case NL80211_RRF_AUTO_BW requested for both rules
861 * set AUTO_BW in intersected rule also. Next we will
862 * calculate BW correctly in handle_channel function.
863 * In other case remove AUTO_BW flag while we calculate
864 * maximum bandwidth correctly and auto calculation is
867 if ((rule1->flags & NL80211_RRF_AUTO_BW) &&
868 (rule2->flags & NL80211_RRF_AUTO_BW))
869 intersected_rule->flags |= NL80211_RRF_AUTO_BW;
871 intersected_rule->flags &= ~NL80211_RRF_AUTO_BW;
873 freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz;
874 if (freq_range->max_bandwidth_khz > freq_diff)
875 freq_range->max_bandwidth_khz = freq_diff;
877 power_rule->max_eirp = min(power_rule1->max_eirp,
878 power_rule2->max_eirp);
879 power_rule->max_antenna_gain = min(power_rule1->max_antenna_gain,
880 power_rule2->max_antenna_gain);
882 intersected_rule->dfs_cac_ms = max(rule1->dfs_cac_ms,
885 if (!is_valid_reg_rule(intersected_rule))
891 /* check whether old rule contains new rule */
892 static bool rule_contains(struct ieee80211_reg_rule *r1,
893 struct ieee80211_reg_rule *r2)
895 /* for simplicity, currently consider only same flags */
896 if (r1->flags != r2->flags)
899 /* verify r1 is more restrictive */
900 if ((r1->power_rule.max_antenna_gain >
901 r2->power_rule.max_antenna_gain) ||
902 r1->power_rule.max_eirp > r2->power_rule.max_eirp)
905 /* make sure r2's range is contained within r1 */
906 if (r1->freq_range.start_freq_khz > r2->freq_range.start_freq_khz ||
907 r1->freq_range.end_freq_khz < r2->freq_range.end_freq_khz)
910 /* and finally verify that r1.max_bw >= r2.max_bw */
911 if (r1->freq_range.max_bandwidth_khz <
912 r2->freq_range.max_bandwidth_khz)
918 /* add or extend current rules. do nothing if rule is already contained */
919 static void add_rule(struct ieee80211_reg_rule *rule,
920 struct ieee80211_reg_rule *reg_rules, u32 *n_rules)
922 struct ieee80211_reg_rule *tmp_rule;
925 for (i = 0; i < *n_rules; i++) {
926 tmp_rule = ®_rules[i];
927 /* rule is already contained - do nothing */
928 if (rule_contains(tmp_rule, rule))
931 /* extend rule if possible */
932 if (rule_contains(rule, tmp_rule)) {
933 memcpy(tmp_rule, rule, sizeof(*rule));
938 memcpy(®_rules[*n_rules], rule, sizeof(*rule));
943 * regdom_intersect - do the intersection between two regulatory domains
944 * @rd1: first regulatory domain
945 * @rd2: second regulatory domain
947 * Use this function to get the intersection between two regulatory domains.
948 * Once completed we will mark the alpha2 for the rd as intersected, "98",
949 * as no one single alpha2 can represent this regulatory domain.
951 * Returns a pointer to the regulatory domain structure which will hold the
952 * resulting intersection of rules between rd1 and rd2. We will
953 * kzalloc() this structure for you.
955 static struct ieee80211_regdomain *
956 regdom_intersect(const struct ieee80211_regdomain *rd1,
957 const struct ieee80211_regdomain *rd2)
961 unsigned int num_rules = 0;
962 const struct ieee80211_reg_rule *rule1, *rule2;
963 struct ieee80211_reg_rule intersected_rule;
964 struct ieee80211_regdomain *rd;
970 * First we get a count of the rules we'll need, then we actually
971 * build them. This is to so we can malloc() and free() a
972 * regdomain once. The reason we use reg_rules_intersect() here
973 * is it will return -EINVAL if the rule computed makes no sense.
974 * All rules that do check out OK are valid.
977 for (x = 0; x < rd1->n_reg_rules; x++) {
978 rule1 = &rd1->reg_rules[x];
979 for (y = 0; y < rd2->n_reg_rules; y++) {
980 rule2 = &rd2->reg_rules[y];
981 if (!reg_rules_intersect(rd1, rd2, rule1, rule2,
990 size_of_regd = sizeof(struct ieee80211_regdomain) +
991 num_rules * sizeof(struct ieee80211_reg_rule);
993 rd = kzalloc(size_of_regd, GFP_KERNEL);
997 for (x = 0; x < rd1->n_reg_rules; x++) {
998 rule1 = &rd1->reg_rules[x];
999 for (y = 0; y < rd2->n_reg_rules; y++) {
1000 rule2 = &rd2->reg_rules[y];
1001 r = reg_rules_intersect(rd1, rd2, rule1, rule2,
1004 * No need to memset here the intersected rule here as
1005 * we're not using the stack anymore
1010 add_rule(&intersected_rule, rd->reg_rules,
1015 rd->alpha2[0] = '9';
1016 rd->alpha2[1] = '8';
1017 rd->dfs_region = reg_intersect_dfs_region(rd1->dfs_region,
1024 * XXX: add support for the rest of enum nl80211_reg_rule_flags, we may
1025 * want to just have the channel structure use these
1027 static u32 map_regdom_flags(u32 rd_flags)
1029 u32 channel_flags = 0;
1030 if (rd_flags & NL80211_RRF_NO_IR_ALL)
1031 channel_flags |= IEEE80211_CHAN_NO_IR;
1032 if (rd_flags & NL80211_RRF_DFS)
1033 channel_flags |= IEEE80211_CHAN_RADAR;
1034 if (rd_flags & NL80211_RRF_NO_OFDM)
1035 channel_flags |= IEEE80211_CHAN_NO_OFDM;
1036 if (rd_flags & NL80211_RRF_NO_OUTDOOR)
1037 channel_flags |= IEEE80211_CHAN_INDOOR_ONLY;
1038 if (rd_flags & NL80211_RRF_IR_CONCURRENT)
1039 channel_flags |= IEEE80211_CHAN_IR_CONCURRENT;
1040 if (rd_flags & NL80211_RRF_NO_HT40MINUS)
1041 channel_flags |= IEEE80211_CHAN_NO_HT40MINUS;
1042 if (rd_flags & NL80211_RRF_NO_HT40PLUS)
1043 channel_flags |= IEEE80211_CHAN_NO_HT40PLUS;
1044 if (rd_flags & NL80211_RRF_NO_80MHZ)
1045 channel_flags |= IEEE80211_CHAN_NO_80MHZ;
1046 if (rd_flags & NL80211_RRF_NO_160MHZ)
1047 channel_flags |= IEEE80211_CHAN_NO_160MHZ;
1048 return channel_flags;
1051 static const struct ieee80211_reg_rule *
1052 freq_reg_info_regd(struct wiphy *wiphy, u32 center_freq,
1053 const struct ieee80211_regdomain *regd, u32 bw)
1056 bool band_rule_found = false;
1057 bool bw_fits = false;
1060 return ERR_PTR(-EINVAL);
1062 for (i = 0; i < regd->n_reg_rules; i++) {
1063 const struct ieee80211_reg_rule *rr;
1064 const struct ieee80211_freq_range *fr = NULL;
1066 rr = ®d->reg_rules[i];
1067 fr = &rr->freq_range;
1070 * We only need to know if one frequency rule was
1071 * was in center_freq's band, that's enough, so lets
1072 * not overwrite it once found
1074 if (!band_rule_found)
1075 band_rule_found = freq_in_rule_band(fr, center_freq);
1077 bw_fits = reg_does_bw_fit(fr, center_freq, bw);
1079 if (band_rule_found && bw_fits)
1083 if (!band_rule_found)
1084 return ERR_PTR(-ERANGE);
1086 return ERR_PTR(-EINVAL);
1089 static const struct ieee80211_reg_rule *
1090 __freq_reg_info(struct wiphy *wiphy, u32 center_freq, u32 min_bw)
1092 const struct ieee80211_regdomain *regd = reg_get_regdomain(wiphy);
1093 const struct ieee80211_reg_rule *reg_rule = NULL;
1096 for (bw = MHZ_TO_KHZ(20); bw >= min_bw; bw = bw / 2) {
1097 reg_rule = freq_reg_info_regd(wiphy, center_freq, regd, bw);
1098 if (!IS_ERR(reg_rule))
1105 const struct ieee80211_reg_rule *freq_reg_info(struct wiphy *wiphy,
1108 return __freq_reg_info(wiphy, center_freq, MHZ_TO_KHZ(20));
1110 EXPORT_SYMBOL(freq_reg_info);
1112 const char *reg_initiator_name(enum nl80211_reg_initiator initiator)
1114 switch (initiator) {
1115 case NL80211_REGDOM_SET_BY_CORE:
1117 case NL80211_REGDOM_SET_BY_USER:
1119 case NL80211_REGDOM_SET_BY_DRIVER:
1121 case NL80211_REGDOM_SET_BY_COUNTRY_IE:
1122 return "country IE";
1128 EXPORT_SYMBOL(reg_initiator_name);
1130 #ifdef CONFIG_CFG80211_REG_DEBUG
1131 static void chan_reg_rule_print_dbg(const struct ieee80211_regdomain *regd,
1132 struct ieee80211_channel *chan,
1133 const struct ieee80211_reg_rule *reg_rule)
1135 const struct ieee80211_power_rule *power_rule;
1136 const struct ieee80211_freq_range *freq_range;
1137 char max_antenna_gain[32], bw[32];
1139 power_rule = ®_rule->power_rule;
1140 freq_range = ®_rule->freq_range;
1142 if (!power_rule->max_antenna_gain)
1143 snprintf(max_antenna_gain, sizeof(max_antenna_gain), "N/A");
1145 snprintf(max_antenna_gain, sizeof(max_antenna_gain), "%d",
1146 power_rule->max_antenna_gain);
1148 if (reg_rule->flags & NL80211_RRF_AUTO_BW)
1149 snprintf(bw, sizeof(bw), "%d KHz, %d KHz AUTO",
1150 freq_range->max_bandwidth_khz,
1151 reg_get_max_bandwidth(regd, reg_rule));
1153 snprintf(bw, sizeof(bw), "%d KHz",
1154 freq_range->max_bandwidth_khz);
1156 REG_DBG_PRINT("Updating information on frequency %d MHz with regulatory rule:\n",
1159 REG_DBG_PRINT("%d KHz - %d KHz @ %s), (%s mBi, %d mBm)\n",
1160 freq_range->start_freq_khz, freq_range->end_freq_khz,
1161 bw, max_antenna_gain,
1162 power_rule->max_eirp);
1165 static void chan_reg_rule_print_dbg(const struct ieee80211_regdomain *regd,
1166 struct ieee80211_channel *chan,
1167 const struct ieee80211_reg_rule *reg_rule)
1174 * Note that right now we assume the desired channel bandwidth
1175 * is always 20 MHz for each individual channel (HT40 uses 20 MHz
1176 * per channel, the primary and the extension channel).
1178 static void handle_channel(struct wiphy *wiphy,
1179 enum nl80211_reg_initiator initiator,
1180 struct ieee80211_channel *chan)
1182 u32 flags, bw_flags = 0;
1183 const struct ieee80211_reg_rule *reg_rule = NULL;
1184 const struct ieee80211_power_rule *power_rule = NULL;
1185 const struct ieee80211_freq_range *freq_range = NULL;
1186 struct wiphy *request_wiphy = NULL;
1187 struct regulatory_request *lr = get_last_request();
1188 const struct ieee80211_regdomain *regd;
1189 u32 max_bandwidth_khz;
1191 request_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx);
1193 flags = chan->orig_flags;
1195 reg_rule = freq_reg_info(wiphy, MHZ_TO_KHZ(chan->center_freq));
1196 if (IS_ERR(reg_rule)) {
1198 * We will disable all channels that do not match our
1199 * received regulatory rule unless the hint is coming
1200 * from a Country IE and the Country IE had no information
1201 * about a band. The IEEE 802.11 spec allows for an AP
1202 * to send only a subset of the regulatory rules allowed,
1203 * so an AP in the US that only supports 2.4 GHz may only send
1204 * a country IE with information for the 2.4 GHz band
1205 * while 5 GHz is still supported.
1207 if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE &&
1208 PTR_ERR(reg_rule) == -ERANGE)
1211 if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER &&
1212 request_wiphy && request_wiphy == wiphy &&
1213 request_wiphy->regulatory_flags & REGULATORY_STRICT_REG) {
1214 REG_DBG_PRINT("Disabling freq %d MHz for good\n",
1216 chan->orig_flags |= IEEE80211_CHAN_DISABLED;
1217 chan->flags = chan->orig_flags;
1219 REG_DBG_PRINT("Disabling freq %d MHz\n",
1221 chan->flags |= IEEE80211_CHAN_DISABLED;
1226 regd = reg_get_regdomain(wiphy);
1227 chan_reg_rule_print_dbg(regd, chan, reg_rule);
1229 power_rule = ®_rule->power_rule;
1230 freq_range = ®_rule->freq_range;
1232 max_bandwidth_khz = freq_range->max_bandwidth_khz;
1233 /* Check if auto calculation requested */
1234 if (reg_rule->flags & NL80211_RRF_AUTO_BW)
1235 max_bandwidth_khz = reg_get_max_bandwidth(regd, reg_rule);
1237 /* If we get a reg_rule we can assume that at least 5Mhz fit */
1238 if (!reg_does_bw_fit(freq_range, MHZ_TO_KHZ(chan->center_freq),
1240 bw_flags |= IEEE80211_CHAN_NO_10MHZ;
1241 if (!reg_does_bw_fit(freq_range, MHZ_TO_KHZ(chan->center_freq),
1243 bw_flags |= IEEE80211_CHAN_NO_20MHZ;
1245 if (max_bandwidth_khz < MHZ_TO_KHZ(10))
1246 bw_flags |= IEEE80211_CHAN_NO_10MHZ;
1247 if (max_bandwidth_khz < MHZ_TO_KHZ(20))
1248 bw_flags |= IEEE80211_CHAN_NO_20MHZ;
1249 if (max_bandwidth_khz < MHZ_TO_KHZ(40))
1250 bw_flags |= IEEE80211_CHAN_NO_HT40;
1251 if (max_bandwidth_khz < MHZ_TO_KHZ(80))
1252 bw_flags |= IEEE80211_CHAN_NO_80MHZ;
1253 if (max_bandwidth_khz < MHZ_TO_KHZ(160))
1254 bw_flags |= IEEE80211_CHAN_NO_160MHZ;
1256 if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER &&
1257 request_wiphy && request_wiphy == wiphy &&
1258 request_wiphy->regulatory_flags & REGULATORY_STRICT_REG) {
1260 * This guarantees the driver's requested regulatory domain
1261 * will always be used as a base for further regulatory
1264 chan->flags = chan->orig_flags =
1265 map_regdom_flags(reg_rule->flags) | bw_flags;
1266 chan->max_antenna_gain = chan->orig_mag =
1267 (int) MBI_TO_DBI(power_rule->max_antenna_gain);
1268 chan->max_reg_power = chan->max_power = chan->orig_mpwr =
1269 (int) MBM_TO_DBM(power_rule->max_eirp);
1271 if (chan->flags & IEEE80211_CHAN_RADAR) {
1272 chan->dfs_cac_ms = IEEE80211_DFS_MIN_CAC_TIME_MS;
1273 if (reg_rule->dfs_cac_ms)
1274 chan->dfs_cac_ms = reg_rule->dfs_cac_ms;
1280 chan->dfs_state = NL80211_DFS_USABLE;
1281 chan->dfs_state_entered = jiffies;
1283 chan->beacon_found = false;
1284 chan->flags = flags | bw_flags | map_regdom_flags(reg_rule->flags);
1285 chan->max_antenna_gain =
1286 min_t(int, chan->orig_mag,
1287 MBI_TO_DBI(power_rule->max_antenna_gain));
1288 chan->max_reg_power = (int) MBM_TO_DBM(power_rule->max_eirp);
1290 if (chan->flags & IEEE80211_CHAN_RADAR) {
1291 if (reg_rule->dfs_cac_ms)
1292 chan->dfs_cac_ms = reg_rule->dfs_cac_ms;
1294 chan->dfs_cac_ms = IEEE80211_DFS_MIN_CAC_TIME_MS;
1297 if (chan->orig_mpwr) {
1299 * Devices that use REGULATORY_COUNTRY_IE_FOLLOW_POWER
1300 * will always follow the passed country IE power settings.
1302 if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE &&
1303 wiphy->regulatory_flags & REGULATORY_COUNTRY_IE_FOLLOW_POWER)
1304 chan->max_power = chan->max_reg_power;
1306 chan->max_power = min(chan->orig_mpwr,
1307 chan->max_reg_power);
1309 chan->max_power = chan->max_reg_power;
1312 static void handle_band(struct wiphy *wiphy,
1313 enum nl80211_reg_initiator initiator,
1314 struct ieee80211_supported_band *sband)
1321 for (i = 0; i < sband->n_channels; i++)
1322 handle_channel(wiphy, initiator, &sband->channels[i]);
1325 static bool reg_request_cell_base(struct regulatory_request *request)
1327 if (request->initiator != NL80211_REGDOM_SET_BY_USER)
1329 return request->user_reg_hint_type == NL80211_USER_REG_HINT_CELL_BASE;
1332 bool reg_last_request_cell_base(void)
1334 return reg_request_cell_base(get_last_request());
1337 #ifdef CONFIG_CFG80211_REG_CELLULAR_HINTS
1338 /* Core specific check */
1339 static enum reg_request_treatment
1340 reg_ignore_cell_hint(struct regulatory_request *pending_request)
1342 struct regulatory_request *lr = get_last_request();
1344 if (!reg_num_devs_support_basehint)
1345 return REG_REQ_IGNORE;
1347 if (reg_request_cell_base(lr) &&
1348 !regdom_changes(pending_request->alpha2))
1349 return REG_REQ_ALREADY_SET;
1354 /* Device specific check */
1355 static bool reg_dev_ignore_cell_hint(struct wiphy *wiphy)
1357 return !(wiphy->features & NL80211_FEATURE_CELL_BASE_REG_HINTS);
1360 static int reg_ignore_cell_hint(struct regulatory_request *pending_request)
1362 return REG_REQ_IGNORE;
1365 static bool reg_dev_ignore_cell_hint(struct wiphy *wiphy)
1371 static bool wiphy_strict_alpha2_regd(struct wiphy *wiphy)
1373 if (wiphy->regulatory_flags & REGULATORY_STRICT_REG &&
1374 !(wiphy->regulatory_flags & REGULATORY_CUSTOM_REG))
1379 static bool ignore_reg_update(struct wiphy *wiphy,
1380 enum nl80211_reg_initiator initiator)
1382 struct regulatory_request *lr = get_last_request();
1384 if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED)
1388 REG_DBG_PRINT("Ignoring regulatory request set by %s "
1389 "since last_request is not set\n",
1390 reg_initiator_name(initiator));
1394 if (initiator == NL80211_REGDOM_SET_BY_CORE &&
1395 wiphy->regulatory_flags & REGULATORY_CUSTOM_REG) {
1396 REG_DBG_PRINT("Ignoring regulatory request set by %s "
1397 "since the driver uses its own custom "
1398 "regulatory domain\n",
1399 reg_initiator_name(initiator));
1404 * wiphy->regd will be set once the device has its own
1405 * desired regulatory domain set
1407 if (wiphy_strict_alpha2_regd(wiphy) && !wiphy->regd &&
1408 initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE &&
1409 !is_world_regdom(lr->alpha2)) {
1410 REG_DBG_PRINT("Ignoring regulatory request set by %s "
1411 "since the driver requires its own regulatory "
1412 "domain to be set first\n",
1413 reg_initiator_name(initiator));
1417 if (reg_request_cell_base(lr))
1418 return reg_dev_ignore_cell_hint(wiphy);
1423 static bool reg_is_world_roaming(struct wiphy *wiphy)
1425 const struct ieee80211_regdomain *cr = get_cfg80211_regdom();
1426 const struct ieee80211_regdomain *wr = get_wiphy_regdom(wiphy);
1427 struct regulatory_request *lr = get_last_request();
1429 if (is_world_regdom(cr->alpha2) || (wr && is_world_regdom(wr->alpha2)))
1432 if (lr && lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE &&
1433 wiphy->regulatory_flags & REGULATORY_CUSTOM_REG)
1439 static void handle_reg_beacon(struct wiphy *wiphy, unsigned int chan_idx,
1440 struct reg_beacon *reg_beacon)
1442 struct ieee80211_supported_band *sband;
1443 struct ieee80211_channel *chan;
1444 bool channel_changed = false;
1445 struct ieee80211_channel chan_before;
1447 sband = wiphy->bands[reg_beacon->chan.band];
1448 chan = &sband->channels[chan_idx];
1450 if (likely(chan->center_freq != reg_beacon->chan.center_freq))
1453 if (chan->beacon_found)
1456 chan->beacon_found = true;
1458 if (!reg_is_world_roaming(wiphy))
1461 if (wiphy->regulatory_flags & REGULATORY_DISABLE_BEACON_HINTS)
1464 chan_before.center_freq = chan->center_freq;
1465 chan_before.flags = chan->flags;
1467 if (chan->flags & IEEE80211_CHAN_NO_IR) {
1468 chan->flags &= ~IEEE80211_CHAN_NO_IR;
1469 channel_changed = true;
1472 if (channel_changed)
1473 nl80211_send_beacon_hint_event(wiphy, &chan_before, chan);
1477 * Called when a scan on a wiphy finds a beacon on
1480 static void wiphy_update_new_beacon(struct wiphy *wiphy,
1481 struct reg_beacon *reg_beacon)
1484 struct ieee80211_supported_band *sband;
1486 if (!wiphy->bands[reg_beacon->chan.band])
1489 sband = wiphy->bands[reg_beacon->chan.band];
1491 for (i = 0; i < sband->n_channels; i++)
1492 handle_reg_beacon(wiphy, i, reg_beacon);
1496 * Called upon reg changes or a new wiphy is added
1498 static void wiphy_update_beacon_reg(struct wiphy *wiphy)
1501 struct ieee80211_supported_band *sband;
1502 struct reg_beacon *reg_beacon;
1504 list_for_each_entry(reg_beacon, ®_beacon_list, list) {
1505 if (!wiphy->bands[reg_beacon->chan.band])
1507 sband = wiphy->bands[reg_beacon->chan.band];
1508 for (i = 0; i < sband->n_channels; i++)
1509 handle_reg_beacon(wiphy, i, reg_beacon);
1513 /* Reap the advantages of previously found beacons */
1514 static void reg_process_beacons(struct wiphy *wiphy)
1517 * Means we are just firing up cfg80211, so no beacons would
1518 * have been processed yet.
1522 wiphy_update_beacon_reg(wiphy);
1525 static bool is_ht40_allowed(struct ieee80211_channel *chan)
1529 if (chan->flags & IEEE80211_CHAN_DISABLED)
1531 /* This would happen when regulatory rules disallow HT40 completely */
1532 if ((chan->flags & IEEE80211_CHAN_NO_HT40) == IEEE80211_CHAN_NO_HT40)
1537 static void reg_process_ht_flags_channel(struct wiphy *wiphy,
1538 struct ieee80211_channel *channel)
1540 struct ieee80211_supported_band *sband = wiphy->bands[channel->band];
1541 struct ieee80211_channel *channel_before = NULL, *channel_after = NULL;
1544 if (!is_ht40_allowed(channel)) {
1545 channel->flags |= IEEE80211_CHAN_NO_HT40;
1550 * We need to ensure the extension channels exist to
1551 * be able to use HT40- or HT40+, this finds them (or not)
1553 for (i = 0; i < sband->n_channels; i++) {
1554 struct ieee80211_channel *c = &sband->channels[i];
1556 if (c->center_freq == (channel->center_freq - 20))
1558 if (c->center_freq == (channel->center_freq + 20))
1563 * Please note that this assumes target bandwidth is 20 MHz,
1564 * if that ever changes we also need to change the below logic
1565 * to include that as well.
1567 if (!is_ht40_allowed(channel_before))
1568 channel->flags |= IEEE80211_CHAN_NO_HT40MINUS;
1570 channel->flags &= ~IEEE80211_CHAN_NO_HT40MINUS;
1572 if (!is_ht40_allowed(channel_after))
1573 channel->flags |= IEEE80211_CHAN_NO_HT40PLUS;
1575 channel->flags &= ~IEEE80211_CHAN_NO_HT40PLUS;
1578 static void reg_process_ht_flags_band(struct wiphy *wiphy,
1579 struct ieee80211_supported_band *sband)
1586 for (i = 0; i < sband->n_channels; i++)
1587 reg_process_ht_flags_channel(wiphy, &sband->channels[i]);
1590 static void reg_process_ht_flags(struct wiphy *wiphy)
1592 enum ieee80211_band band;
1597 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
1598 reg_process_ht_flags_band(wiphy, wiphy->bands[band]);
1601 static void reg_call_notifier(struct wiphy *wiphy,
1602 struct regulatory_request *request)
1604 if (wiphy->reg_notifier)
1605 wiphy->reg_notifier(wiphy, request);
1608 static bool reg_wdev_chan_valid(struct wiphy *wiphy, struct wireless_dev *wdev)
1610 struct cfg80211_chan_def chandef;
1611 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
1612 enum nl80211_iftype iftype;
1615 iftype = wdev->iftype;
1617 /* make sure the interface is active */
1618 if (!wdev->netdev || !netif_running(wdev->netdev))
1619 goto wdev_inactive_unlock;
1622 case NL80211_IFTYPE_AP:
1623 case NL80211_IFTYPE_P2P_GO:
1624 if (!wdev->beacon_interval)
1625 goto wdev_inactive_unlock;
1626 chandef = wdev->chandef;
1628 case NL80211_IFTYPE_ADHOC:
1629 if (!wdev->ssid_len)
1630 goto wdev_inactive_unlock;
1631 chandef = wdev->chandef;
1633 case NL80211_IFTYPE_STATION:
1634 case NL80211_IFTYPE_P2P_CLIENT:
1635 if (!wdev->current_bss ||
1636 !wdev->current_bss->pub.channel)
1637 goto wdev_inactive_unlock;
1639 if (!rdev->ops->get_channel ||
1640 rdev_get_channel(rdev, wdev, &chandef))
1641 cfg80211_chandef_create(&chandef,
1642 wdev->current_bss->pub.channel,
1643 NL80211_CHAN_NO_HT);
1645 case NL80211_IFTYPE_MONITOR:
1646 case NL80211_IFTYPE_AP_VLAN:
1647 case NL80211_IFTYPE_P2P_DEVICE:
1648 /* no enforcement required */
1651 /* others not implemented for now */
1659 case NL80211_IFTYPE_AP:
1660 case NL80211_IFTYPE_P2P_GO:
1661 case NL80211_IFTYPE_ADHOC:
1662 return cfg80211_reg_can_beacon_relax(wiphy, &chandef, iftype);
1663 case NL80211_IFTYPE_STATION:
1664 case NL80211_IFTYPE_P2P_CLIENT:
1665 return cfg80211_chandef_usable(wiphy, &chandef,
1666 IEEE80211_CHAN_DISABLED);
1673 wdev_inactive_unlock:
1678 static void reg_leave_invalid_chans(struct wiphy *wiphy)
1680 struct wireless_dev *wdev;
1681 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
1685 list_for_each_entry(wdev, &rdev->wdev_list, list)
1686 if (!reg_wdev_chan_valid(wiphy, wdev))
1687 cfg80211_leave(rdev, wdev);
1690 static void reg_check_chans_work(struct work_struct *work)
1692 struct cfg80211_registered_device *rdev;
1694 REG_DBG_PRINT("Verifying active interfaces after reg change\n");
1697 list_for_each_entry(rdev, &cfg80211_rdev_list, list)
1698 if (!(rdev->wiphy.regulatory_flags &
1699 REGULATORY_IGNORE_STALE_KICKOFF))
1700 reg_leave_invalid_chans(&rdev->wiphy);
1705 static void reg_check_channels(void)
1708 * Give usermode a chance to do something nicer (move to another
1709 * channel, orderly disconnection), before forcing a disconnection.
1711 mod_delayed_work(system_power_efficient_wq,
1713 msecs_to_jiffies(REG_ENFORCE_GRACE_MS));
1716 static void wiphy_update_regulatory(struct wiphy *wiphy,
1717 enum nl80211_reg_initiator initiator)
1719 enum ieee80211_band band;
1720 struct regulatory_request *lr = get_last_request();
1722 if (ignore_reg_update(wiphy, initiator)) {
1724 * Regulatory updates set by CORE are ignored for custom
1725 * regulatory cards. Let us notify the changes to the driver,
1726 * as some drivers used this to restore its orig_* reg domain.
1728 if (initiator == NL80211_REGDOM_SET_BY_CORE &&
1729 wiphy->regulatory_flags & REGULATORY_CUSTOM_REG)
1730 reg_call_notifier(wiphy, lr);
1734 lr->dfs_region = get_cfg80211_regdom()->dfs_region;
1736 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
1737 handle_band(wiphy, initiator, wiphy->bands[band]);
1739 reg_process_beacons(wiphy);
1740 reg_process_ht_flags(wiphy);
1741 reg_call_notifier(wiphy, lr);
1744 static void update_all_wiphy_regulatory(enum nl80211_reg_initiator initiator)
1746 struct cfg80211_registered_device *rdev;
1747 struct wiphy *wiphy;
1751 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
1752 wiphy = &rdev->wiphy;
1753 wiphy_update_regulatory(wiphy, initiator);
1756 reg_check_channels();
1759 static void handle_channel_custom(struct wiphy *wiphy,
1760 struct ieee80211_channel *chan,
1761 const struct ieee80211_regdomain *regd)
1764 const struct ieee80211_reg_rule *reg_rule = NULL;
1765 const struct ieee80211_power_rule *power_rule = NULL;
1766 const struct ieee80211_freq_range *freq_range = NULL;
1767 u32 max_bandwidth_khz;
1770 for (bw = MHZ_TO_KHZ(20); bw >= MHZ_TO_KHZ(5); bw = bw / 2) {
1771 reg_rule = freq_reg_info_regd(wiphy,
1772 MHZ_TO_KHZ(chan->center_freq),
1774 if (!IS_ERR(reg_rule))
1778 if (IS_ERR(reg_rule)) {
1779 REG_DBG_PRINT("Disabling freq %d MHz as custom regd has no rule that fits it\n",
1781 if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) {
1782 chan->flags |= IEEE80211_CHAN_DISABLED;
1784 chan->orig_flags |= IEEE80211_CHAN_DISABLED;
1785 chan->flags = chan->orig_flags;
1790 chan_reg_rule_print_dbg(regd, chan, reg_rule);
1792 power_rule = ®_rule->power_rule;
1793 freq_range = ®_rule->freq_range;
1795 max_bandwidth_khz = freq_range->max_bandwidth_khz;
1796 /* Check if auto calculation requested */
1797 if (reg_rule->flags & NL80211_RRF_AUTO_BW)
1798 max_bandwidth_khz = reg_get_max_bandwidth(regd, reg_rule);
1800 /* If we get a reg_rule we can assume that at least 5Mhz fit */
1801 if (!reg_does_bw_fit(freq_range, MHZ_TO_KHZ(chan->center_freq),
1803 bw_flags |= IEEE80211_CHAN_NO_10MHZ;
1804 if (!reg_does_bw_fit(freq_range, MHZ_TO_KHZ(chan->center_freq),
1806 bw_flags |= IEEE80211_CHAN_NO_20MHZ;
1808 if (max_bandwidth_khz < MHZ_TO_KHZ(10))
1809 bw_flags |= IEEE80211_CHAN_NO_10MHZ;
1810 if (max_bandwidth_khz < MHZ_TO_KHZ(20))
1811 bw_flags |= IEEE80211_CHAN_NO_20MHZ;
1812 if (max_bandwidth_khz < MHZ_TO_KHZ(40))
1813 bw_flags |= IEEE80211_CHAN_NO_HT40;
1814 if (max_bandwidth_khz < MHZ_TO_KHZ(80))
1815 bw_flags |= IEEE80211_CHAN_NO_80MHZ;
1816 if (max_bandwidth_khz < MHZ_TO_KHZ(160))
1817 bw_flags |= IEEE80211_CHAN_NO_160MHZ;
1819 chan->dfs_state_entered = jiffies;
1820 chan->dfs_state = NL80211_DFS_USABLE;
1822 chan->beacon_found = false;
1824 if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED)
1825 chan->flags = chan->orig_flags | bw_flags |
1826 map_regdom_flags(reg_rule->flags);
1828 chan->flags |= map_regdom_flags(reg_rule->flags) | bw_flags;
1830 chan->max_antenna_gain = (int) MBI_TO_DBI(power_rule->max_antenna_gain);
1831 chan->max_reg_power = chan->max_power =
1832 (int) MBM_TO_DBM(power_rule->max_eirp);
1834 if (chan->flags & IEEE80211_CHAN_RADAR) {
1835 if (reg_rule->dfs_cac_ms)
1836 chan->dfs_cac_ms = reg_rule->dfs_cac_ms;
1838 chan->dfs_cac_ms = IEEE80211_DFS_MIN_CAC_TIME_MS;
1841 chan->max_power = chan->max_reg_power;
1844 static void handle_band_custom(struct wiphy *wiphy,
1845 struct ieee80211_supported_band *sband,
1846 const struct ieee80211_regdomain *regd)
1853 for (i = 0; i < sband->n_channels; i++)
1854 handle_channel_custom(wiphy, &sband->channels[i], regd);
1857 /* Used by drivers prior to wiphy registration */
1858 void wiphy_apply_custom_regulatory(struct wiphy *wiphy,
1859 const struct ieee80211_regdomain *regd)
1861 enum ieee80211_band band;
1862 unsigned int bands_set = 0;
1864 WARN(!(wiphy->regulatory_flags & REGULATORY_CUSTOM_REG),
1865 "wiphy should have REGULATORY_CUSTOM_REG\n");
1866 wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG;
1868 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
1869 if (!wiphy->bands[band])
1871 handle_band_custom(wiphy, wiphy->bands[band], regd);
1876 * no point in calling this if it won't have any effect
1877 * on your device's supported bands.
1879 WARN_ON(!bands_set);
1881 EXPORT_SYMBOL(wiphy_apply_custom_regulatory);
1883 static void reg_set_request_processed(void)
1885 bool need_more_processing = false;
1886 struct regulatory_request *lr = get_last_request();
1888 lr->processed = true;
1890 spin_lock(®_requests_lock);
1891 if (!list_empty(®_requests_list))
1892 need_more_processing = true;
1893 spin_unlock(®_requests_lock);
1895 cancel_crda_timeout();
1897 if (need_more_processing)
1898 schedule_work(®_work);
1902 * reg_process_hint_core - process core regulatory requests
1903 * @pending_request: a pending core regulatory request
1905 * The wireless subsystem can use this function to process
1906 * a regulatory request issued by the regulatory core.
1908 static void reg_process_hint_core(struct regulatory_request *core_request)
1910 if (reg_query_database(core_request)) {
1911 core_request->intersect = false;
1912 core_request->processed = false;
1913 reg_update_last_request(core_request);
1917 static enum reg_request_treatment
1918 __reg_process_hint_user(struct regulatory_request *user_request)
1920 struct regulatory_request *lr = get_last_request();
1922 if (reg_request_cell_base(user_request))
1923 return reg_ignore_cell_hint(user_request);
1925 if (reg_request_cell_base(lr))
1926 return REG_REQ_IGNORE;
1928 if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE)
1929 return REG_REQ_INTERSECT;
1931 * If the user knows better the user should set the regdom
1932 * to their country before the IE is picked up
1934 if (lr->initiator == NL80211_REGDOM_SET_BY_USER &&
1936 return REG_REQ_IGNORE;
1938 * Process user requests only after previous user/driver/core
1939 * requests have been processed
1941 if ((lr->initiator == NL80211_REGDOM_SET_BY_CORE ||
1942 lr->initiator == NL80211_REGDOM_SET_BY_DRIVER ||
1943 lr->initiator == NL80211_REGDOM_SET_BY_USER) &&
1944 regdom_changes(lr->alpha2))
1945 return REG_REQ_IGNORE;
1947 if (!regdom_changes(user_request->alpha2))
1948 return REG_REQ_ALREADY_SET;
1954 * reg_process_hint_user - process user regulatory requests
1955 * @user_request: a pending user regulatory request
1957 * The wireless subsystem can use this function to process
1958 * a regulatory request initiated by userspace.
1960 static void reg_process_hint_user(struct regulatory_request *user_request)
1962 enum reg_request_treatment treatment;
1964 treatment = __reg_process_hint_user(user_request);
1965 if (treatment == REG_REQ_IGNORE ||
1966 treatment == REG_REQ_ALREADY_SET) {
1967 reg_free_request(user_request);
1971 user_request->intersect = treatment == REG_REQ_INTERSECT;
1972 user_request->processed = false;
1974 if (reg_query_database(user_request)) {
1975 reg_update_last_request(user_request);
1976 user_alpha2[0] = user_request->alpha2[0];
1977 user_alpha2[1] = user_request->alpha2[1];
1979 reg_free_request(user_request);
1983 static enum reg_request_treatment
1984 __reg_process_hint_driver(struct regulatory_request *driver_request)
1986 struct regulatory_request *lr = get_last_request();
1988 if (lr->initiator == NL80211_REGDOM_SET_BY_CORE) {
1989 if (regdom_changes(driver_request->alpha2))
1991 return REG_REQ_ALREADY_SET;
1995 * This would happen if you unplug and plug your card
1996 * back in or if you add a new device for which the previously
1997 * loaded card also agrees on the regulatory domain.
1999 if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER &&
2000 !regdom_changes(driver_request->alpha2))
2001 return REG_REQ_ALREADY_SET;
2003 return REG_REQ_INTERSECT;
2007 * reg_process_hint_driver - process driver regulatory requests
2008 * @driver_request: a pending driver regulatory request
2010 * The wireless subsystem can use this function to process
2011 * a regulatory request issued by an 802.11 driver.
2013 * Returns one of the different reg request treatment values.
2015 static enum reg_request_treatment
2016 reg_process_hint_driver(struct wiphy *wiphy,
2017 struct regulatory_request *driver_request)
2019 const struct ieee80211_regdomain *regd, *tmp;
2020 enum reg_request_treatment treatment;
2022 treatment = __reg_process_hint_driver(driver_request);
2024 switch (treatment) {
2027 case REG_REQ_IGNORE:
2028 reg_free_request(driver_request);
2030 case REG_REQ_INTERSECT:
2032 case REG_REQ_ALREADY_SET:
2033 regd = reg_copy_regd(get_cfg80211_regdom());
2035 reg_free_request(driver_request);
2036 return REG_REQ_IGNORE;
2039 tmp = get_wiphy_regdom(wiphy);
2040 rcu_assign_pointer(wiphy->regd, regd);
2041 rcu_free_regdom(tmp);
2045 driver_request->intersect = treatment == REG_REQ_INTERSECT;
2046 driver_request->processed = false;
2049 * Since CRDA will not be called in this case as we already
2050 * have applied the requested regulatory domain before we just
2051 * inform userspace we have processed the request
2053 if (treatment == REG_REQ_ALREADY_SET) {
2054 nl80211_send_reg_change_event(driver_request);
2055 reg_update_last_request(driver_request);
2056 reg_set_request_processed();
2060 if (reg_query_database(driver_request))
2061 reg_update_last_request(driver_request);
2063 reg_free_request(driver_request);
2068 static enum reg_request_treatment
2069 __reg_process_hint_country_ie(struct wiphy *wiphy,
2070 struct regulatory_request *country_ie_request)
2072 struct wiphy *last_wiphy = NULL;
2073 struct regulatory_request *lr = get_last_request();
2075 if (reg_request_cell_base(lr)) {
2076 /* Trust a Cell base station over the AP's country IE */
2077 if (regdom_changes(country_ie_request->alpha2))
2078 return REG_REQ_IGNORE;
2079 return REG_REQ_ALREADY_SET;
2081 if (wiphy->regulatory_flags & REGULATORY_COUNTRY_IE_IGNORE)
2082 return REG_REQ_IGNORE;
2085 if (unlikely(!is_an_alpha2(country_ie_request->alpha2)))
2088 if (lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE)
2091 last_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx);
2093 if (last_wiphy != wiphy) {
2095 * Two cards with two APs claiming different
2096 * Country IE alpha2s. We could
2097 * intersect them, but that seems unlikely
2098 * to be correct. Reject second one for now.
2100 if (regdom_changes(country_ie_request->alpha2))
2101 return REG_REQ_IGNORE;
2102 return REG_REQ_ALREADY_SET;
2105 if (regdom_changes(country_ie_request->alpha2))
2107 return REG_REQ_ALREADY_SET;
2111 * reg_process_hint_country_ie - process regulatory requests from country IEs
2112 * @country_ie_request: a regulatory request from a country IE
2114 * The wireless subsystem can use this function to process
2115 * a regulatory request issued by a country Information Element.
2117 * Returns one of the different reg request treatment values.
2119 static enum reg_request_treatment
2120 reg_process_hint_country_ie(struct wiphy *wiphy,
2121 struct regulatory_request *country_ie_request)
2123 enum reg_request_treatment treatment;
2125 treatment = __reg_process_hint_country_ie(wiphy, country_ie_request);
2127 switch (treatment) {
2130 case REG_REQ_IGNORE:
2132 case REG_REQ_ALREADY_SET:
2133 reg_free_request(country_ie_request);
2135 case REG_REQ_INTERSECT:
2136 reg_free_request(country_ie_request);
2138 * This doesn't happen yet, not sure we
2139 * ever want to support it for this case.
2141 WARN_ONCE(1, "Unexpected intersection for country IEs");
2142 return REG_REQ_IGNORE;
2145 country_ie_request->intersect = false;
2146 country_ie_request->processed = false;
2148 if (reg_query_database(country_ie_request))
2149 reg_update_last_request(country_ie_request);
2151 reg_free_request(country_ie_request);
2156 /* This processes *all* regulatory hints */
2157 static void reg_process_hint(struct regulatory_request *reg_request)
2159 struct wiphy *wiphy = NULL;
2160 enum reg_request_treatment treatment;
2162 if (reg_request->wiphy_idx != WIPHY_IDX_INVALID)
2163 wiphy = wiphy_idx_to_wiphy(reg_request->wiphy_idx);
2165 switch (reg_request->initiator) {
2166 case NL80211_REGDOM_SET_BY_CORE:
2167 reg_process_hint_core(reg_request);
2169 case NL80211_REGDOM_SET_BY_USER:
2170 reg_process_hint_user(reg_request);
2172 case NL80211_REGDOM_SET_BY_DRIVER:
2175 treatment = reg_process_hint_driver(wiphy, reg_request);
2177 case NL80211_REGDOM_SET_BY_COUNTRY_IE:
2180 treatment = reg_process_hint_country_ie(wiphy, reg_request);
2183 WARN(1, "invalid initiator %d\n", reg_request->initiator);
2187 /* This is required so that the orig_* parameters are saved.
2188 * NOTE: treatment must be set for any case that reaches here!
2190 if (treatment == REG_REQ_ALREADY_SET && wiphy &&
2191 wiphy->regulatory_flags & REGULATORY_STRICT_REG) {
2192 wiphy_update_regulatory(wiphy, reg_request->initiator);
2193 reg_check_channels();
2199 reg_free_request(reg_request);
2202 static bool reg_only_self_managed_wiphys(void)
2204 struct cfg80211_registered_device *rdev;
2205 struct wiphy *wiphy;
2206 bool self_managed_found = false;
2210 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
2211 wiphy = &rdev->wiphy;
2212 if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED)
2213 self_managed_found = true;
2218 /* make sure at least one self-managed wiphy exists */
2219 return self_managed_found;
2223 * Processes regulatory hints, this is all the NL80211_REGDOM_SET_BY_*
2224 * Regulatory hints come on a first come first serve basis and we
2225 * must process each one atomically.
2227 static void reg_process_pending_hints(void)
2229 struct regulatory_request *reg_request, *lr;
2231 lr = get_last_request();
2233 /* When last_request->processed becomes true this will be rescheduled */
2234 if (lr && !lr->processed) {
2235 reg_process_hint(lr);
2239 spin_lock(®_requests_lock);
2241 if (list_empty(®_requests_list)) {
2242 spin_unlock(®_requests_lock);
2246 reg_request = list_first_entry(®_requests_list,
2247 struct regulatory_request,
2249 list_del_init(®_request->list);
2251 spin_unlock(®_requests_lock);
2253 if (reg_only_self_managed_wiphys()) {
2254 reg_free_request(reg_request);
2258 reg_process_hint(reg_request);
2260 lr = get_last_request();
2262 spin_lock(®_requests_lock);
2263 if (!list_empty(®_requests_list) && lr && lr->processed)
2264 schedule_work(®_work);
2265 spin_unlock(®_requests_lock);
2268 /* Processes beacon hints -- this has nothing to do with country IEs */
2269 static void reg_process_pending_beacon_hints(void)
2271 struct cfg80211_registered_device *rdev;
2272 struct reg_beacon *pending_beacon, *tmp;
2274 /* This goes through the _pending_ beacon list */
2275 spin_lock_bh(®_pending_beacons_lock);
2277 list_for_each_entry_safe(pending_beacon, tmp,
2278 ®_pending_beacons, list) {
2279 list_del_init(&pending_beacon->list);
2281 /* Applies the beacon hint to current wiphys */
2282 list_for_each_entry(rdev, &cfg80211_rdev_list, list)
2283 wiphy_update_new_beacon(&rdev->wiphy, pending_beacon);
2285 /* Remembers the beacon hint for new wiphys or reg changes */
2286 list_add_tail(&pending_beacon->list, ®_beacon_list);
2289 spin_unlock_bh(®_pending_beacons_lock);
2292 static void reg_process_self_managed_hints(void)
2294 struct cfg80211_registered_device *rdev;
2295 struct wiphy *wiphy;
2296 const struct ieee80211_regdomain *tmp;
2297 const struct ieee80211_regdomain *regd;
2298 enum ieee80211_band band;
2299 struct regulatory_request request = {};
2301 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
2302 wiphy = &rdev->wiphy;
2304 spin_lock(®_requests_lock);
2305 regd = rdev->requested_regd;
2306 rdev->requested_regd = NULL;
2307 spin_unlock(®_requests_lock);
2312 tmp = get_wiphy_regdom(wiphy);
2313 rcu_assign_pointer(wiphy->regd, regd);
2314 rcu_free_regdom(tmp);
2316 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
2317 handle_band_custom(wiphy, wiphy->bands[band], regd);
2319 reg_process_ht_flags(wiphy);
2321 request.wiphy_idx = get_wiphy_idx(wiphy);
2322 request.alpha2[0] = regd->alpha2[0];
2323 request.alpha2[1] = regd->alpha2[1];
2324 request.initiator = NL80211_REGDOM_SET_BY_DRIVER;
2326 nl80211_send_wiphy_reg_change_event(&request);
2329 reg_check_channels();
2332 static void reg_todo(struct work_struct *work)
2335 reg_process_pending_hints();
2336 reg_process_pending_beacon_hints();
2337 reg_process_self_managed_hints();
2341 static void queue_regulatory_request(struct regulatory_request *request)
2343 request->alpha2[0] = toupper(request->alpha2[0]);
2344 request->alpha2[1] = toupper(request->alpha2[1]);
2346 spin_lock(®_requests_lock);
2347 list_add_tail(&request->list, ®_requests_list);
2348 spin_unlock(®_requests_lock);
2350 schedule_work(®_work);
2354 * Core regulatory hint -- happens during cfg80211_init()
2355 * and when we restore regulatory settings.
2357 static int regulatory_hint_core(const char *alpha2)
2359 struct regulatory_request *request;
2361 request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL);
2365 request->alpha2[0] = alpha2[0];
2366 request->alpha2[1] = alpha2[1];
2367 request->initiator = NL80211_REGDOM_SET_BY_CORE;
2369 queue_regulatory_request(request);
2375 int regulatory_hint_user(const char *alpha2,
2376 enum nl80211_user_reg_hint_type user_reg_hint_type)
2378 struct regulatory_request *request;
2380 if (WARN_ON(!alpha2))
2383 request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL);
2387 request->wiphy_idx = WIPHY_IDX_INVALID;
2388 request->alpha2[0] = alpha2[0];
2389 request->alpha2[1] = alpha2[1];
2390 request->initiator = NL80211_REGDOM_SET_BY_USER;
2391 request->user_reg_hint_type = user_reg_hint_type;
2393 /* Allow calling CRDA again */
2394 reset_crda_timeouts();
2396 queue_regulatory_request(request);
2401 int regulatory_hint_indoor(bool is_indoor, u32 portid)
2403 spin_lock(®_indoor_lock);
2405 /* It is possible that more than one user space process is trying to
2406 * configure the indoor setting. To handle such cases, clear the indoor
2407 * setting in case that some process does not think that the device
2408 * is operating in an indoor environment. In addition, if a user space
2409 * process indicates that it is controlling the indoor setting, save its
2410 * portid, i.e., make it the owner.
2412 reg_is_indoor = is_indoor;
2413 if (reg_is_indoor) {
2414 if (!reg_is_indoor_portid)
2415 reg_is_indoor_portid = portid;
2417 reg_is_indoor_portid = 0;
2420 spin_unlock(®_indoor_lock);
2423 reg_check_channels();
2428 void regulatory_netlink_notify(u32 portid)
2430 spin_lock(®_indoor_lock);
2432 if (reg_is_indoor_portid != portid) {
2433 spin_unlock(®_indoor_lock);
2437 reg_is_indoor = false;
2438 reg_is_indoor_portid = 0;
2440 spin_unlock(®_indoor_lock);
2442 reg_check_channels();
2446 int regulatory_hint(struct wiphy *wiphy, const char *alpha2)
2448 struct regulatory_request *request;
2450 if (WARN_ON(!alpha2 || !wiphy))
2453 wiphy->regulatory_flags &= ~REGULATORY_CUSTOM_REG;
2455 request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL);
2459 request->wiphy_idx = get_wiphy_idx(wiphy);
2461 request->alpha2[0] = alpha2[0];
2462 request->alpha2[1] = alpha2[1];
2463 request->initiator = NL80211_REGDOM_SET_BY_DRIVER;
2465 /* Allow calling CRDA again */
2466 reset_crda_timeouts();
2468 queue_regulatory_request(request);
2472 EXPORT_SYMBOL(regulatory_hint);
2474 void regulatory_hint_country_ie(struct wiphy *wiphy, enum ieee80211_band band,
2475 const u8 *country_ie, u8 country_ie_len)
2478 enum environment_cap env = ENVIRON_ANY;
2479 struct regulatory_request *request = NULL, *lr;
2481 /* IE len must be evenly divisible by 2 */
2482 if (country_ie_len & 0x01)
2485 if (country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
2488 request = kzalloc(sizeof(*request), GFP_KERNEL);
2492 alpha2[0] = country_ie[0];
2493 alpha2[1] = country_ie[1];
2495 if (country_ie[2] == 'I')
2496 env = ENVIRON_INDOOR;
2497 else if (country_ie[2] == 'O')
2498 env = ENVIRON_OUTDOOR;
2501 lr = get_last_request();
2507 * We will run this only upon a successful connection on cfg80211.
2508 * We leave conflict resolution to the workqueue, where can hold
2511 if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE &&
2512 lr->wiphy_idx != WIPHY_IDX_INVALID)
2515 request->wiphy_idx = get_wiphy_idx(wiphy);
2516 request->alpha2[0] = alpha2[0];
2517 request->alpha2[1] = alpha2[1];
2518 request->initiator = NL80211_REGDOM_SET_BY_COUNTRY_IE;
2519 request->country_ie_env = env;
2521 /* Allow calling CRDA again */
2522 reset_crda_timeouts();
2524 queue_regulatory_request(request);
2531 static void restore_alpha2(char *alpha2, bool reset_user)
2533 /* indicates there is no alpha2 to consider for restoration */
2537 /* The user setting has precedence over the module parameter */
2538 if (is_user_regdom_saved()) {
2539 /* Unless we're asked to ignore it and reset it */
2541 REG_DBG_PRINT("Restoring regulatory settings including user preference\n");
2542 user_alpha2[0] = '9';
2543 user_alpha2[1] = '7';
2546 * If we're ignoring user settings, we still need to
2547 * check the module parameter to ensure we put things
2548 * back as they were for a full restore.
2550 if (!is_world_regdom(ieee80211_regdom)) {
2551 REG_DBG_PRINT("Keeping preference on module parameter ieee80211_regdom: %c%c\n",
2552 ieee80211_regdom[0], ieee80211_regdom[1]);
2553 alpha2[0] = ieee80211_regdom[0];
2554 alpha2[1] = ieee80211_regdom[1];
2557 REG_DBG_PRINT("Restoring regulatory settings while preserving user preference for: %c%c\n",
2558 user_alpha2[0], user_alpha2[1]);
2559 alpha2[0] = user_alpha2[0];
2560 alpha2[1] = user_alpha2[1];
2562 } else if (!is_world_regdom(ieee80211_regdom)) {
2563 REG_DBG_PRINT("Keeping preference on module parameter ieee80211_regdom: %c%c\n",
2564 ieee80211_regdom[0], ieee80211_regdom[1]);
2565 alpha2[0] = ieee80211_regdom[0];
2566 alpha2[1] = ieee80211_regdom[1];
2568 REG_DBG_PRINT("Restoring regulatory settings\n");
2571 static void restore_custom_reg_settings(struct wiphy *wiphy)
2573 struct ieee80211_supported_band *sband;
2574 enum ieee80211_band band;
2575 struct ieee80211_channel *chan;
2578 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
2579 sband = wiphy->bands[band];
2582 for (i = 0; i < sband->n_channels; i++) {
2583 chan = &sband->channels[i];
2584 chan->flags = chan->orig_flags;
2585 chan->max_antenna_gain = chan->orig_mag;
2586 chan->max_power = chan->orig_mpwr;
2587 chan->beacon_found = false;
2593 * Restoring regulatory settings involves ingoring any
2594 * possibly stale country IE information and user regulatory
2595 * settings if so desired, this includes any beacon hints
2596 * learned as we could have traveled outside to another country
2597 * after disconnection. To restore regulatory settings we do
2598 * exactly what we did at bootup:
2600 * - send a core regulatory hint
2601 * - send a user regulatory hint if applicable
2603 * Device drivers that send a regulatory hint for a specific country
2604 * keep their own regulatory domain on wiphy->regd so that does does
2605 * not need to be remembered.
2607 static void restore_regulatory_settings(bool reset_user)
2610 char world_alpha2[2];
2611 struct reg_beacon *reg_beacon, *btmp;
2612 LIST_HEAD(tmp_reg_req_list);
2613 struct cfg80211_registered_device *rdev;
2618 * Clear the indoor setting in case that it is not controlled by user
2619 * space, as otherwise there is no guarantee that the device is still
2620 * operating in an indoor environment.
2622 spin_lock(®_indoor_lock);
2623 if (reg_is_indoor && !reg_is_indoor_portid) {
2624 reg_is_indoor = false;
2625 reg_check_channels();
2627 spin_unlock(®_indoor_lock);
2629 reset_regdomains(true, &world_regdom);
2630 restore_alpha2(alpha2, reset_user);
2633 * If there's any pending requests we simply
2634 * stash them to a temporary pending queue and
2635 * add then after we've restored regulatory
2638 spin_lock(®_requests_lock);
2639 list_splice_tail_init(®_requests_list, &tmp_reg_req_list);
2640 spin_unlock(®_requests_lock);
2642 /* Clear beacon hints */
2643 spin_lock_bh(®_pending_beacons_lock);
2644 list_for_each_entry_safe(reg_beacon, btmp, ®_pending_beacons, list) {
2645 list_del(®_beacon->list);
2648 spin_unlock_bh(®_pending_beacons_lock);
2650 list_for_each_entry_safe(reg_beacon, btmp, ®_beacon_list, list) {
2651 list_del(®_beacon->list);
2655 /* First restore to the basic regulatory settings */
2656 world_alpha2[0] = cfg80211_world_regdom->alpha2[0];
2657 world_alpha2[1] = cfg80211_world_regdom->alpha2[1];
2659 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
2660 if (rdev->wiphy.regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED)
2662 if (rdev->wiphy.regulatory_flags & REGULATORY_CUSTOM_REG)
2663 restore_custom_reg_settings(&rdev->wiphy);
2666 regulatory_hint_core(world_alpha2);
2669 * This restores the ieee80211_regdom module parameter
2670 * preference or the last user requested regulatory
2671 * settings, user regulatory settings takes precedence.
2673 if (is_an_alpha2(alpha2))
2674 regulatory_hint_user(alpha2, NL80211_USER_REG_HINT_USER);
2676 spin_lock(®_requests_lock);
2677 list_splice_tail_init(&tmp_reg_req_list, ®_requests_list);
2678 spin_unlock(®_requests_lock);
2680 REG_DBG_PRINT("Kicking the queue\n");
2682 schedule_work(®_work);
2685 void regulatory_hint_disconnect(void)
2687 REG_DBG_PRINT("All devices are disconnected, going to restore regulatory settings\n");
2688 restore_regulatory_settings(false);
2691 static bool freq_is_chan_12_13_14(u16 freq)
2693 if (freq == ieee80211_channel_to_frequency(12, IEEE80211_BAND_2GHZ) ||
2694 freq == ieee80211_channel_to_frequency(13, IEEE80211_BAND_2GHZ) ||
2695 freq == ieee80211_channel_to_frequency(14, IEEE80211_BAND_2GHZ))
2700 static bool pending_reg_beacon(struct ieee80211_channel *beacon_chan)
2702 struct reg_beacon *pending_beacon;
2704 list_for_each_entry(pending_beacon, ®_pending_beacons, list)
2705 if (beacon_chan->center_freq ==
2706 pending_beacon->chan.center_freq)
2711 int regulatory_hint_found_beacon(struct wiphy *wiphy,
2712 struct ieee80211_channel *beacon_chan,
2715 struct reg_beacon *reg_beacon;
2718 if (beacon_chan->beacon_found ||
2719 beacon_chan->flags & IEEE80211_CHAN_RADAR ||
2720 (beacon_chan->band == IEEE80211_BAND_2GHZ &&
2721 !freq_is_chan_12_13_14(beacon_chan->center_freq)))
2724 spin_lock_bh(®_pending_beacons_lock);
2725 processing = pending_reg_beacon(beacon_chan);
2726 spin_unlock_bh(®_pending_beacons_lock);
2731 reg_beacon = kzalloc(sizeof(struct reg_beacon), gfp);
2735 REG_DBG_PRINT("Found new beacon on frequency: %d MHz (Ch %d) on %s\n",
2736 beacon_chan->center_freq,
2737 ieee80211_frequency_to_channel(beacon_chan->center_freq),
2740 memcpy(®_beacon->chan, beacon_chan,
2741 sizeof(struct ieee80211_channel));
2744 * Since we can be called from BH or and non-BH context
2745 * we must use spin_lock_bh()
2747 spin_lock_bh(®_pending_beacons_lock);
2748 list_add_tail(®_beacon->list, ®_pending_beacons);
2749 spin_unlock_bh(®_pending_beacons_lock);
2751 schedule_work(®_work);
2756 static void print_rd_rules(const struct ieee80211_regdomain *rd)
2759 const struct ieee80211_reg_rule *reg_rule = NULL;
2760 const struct ieee80211_freq_range *freq_range = NULL;
2761 const struct ieee80211_power_rule *power_rule = NULL;
2762 char bw[32], cac_time[32];
2764 pr_info(" (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp), (dfs_cac_time)\n");
2766 for (i = 0; i < rd->n_reg_rules; i++) {
2767 reg_rule = &rd->reg_rules[i];
2768 freq_range = ®_rule->freq_range;
2769 power_rule = ®_rule->power_rule;
2771 if (reg_rule->flags & NL80211_RRF_AUTO_BW)
2772 snprintf(bw, sizeof(bw), "%d KHz, %d KHz AUTO",
2773 freq_range->max_bandwidth_khz,
2774 reg_get_max_bandwidth(rd, reg_rule));
2776 snprintf(bw, sizeof(bw), "%d KHz",
2777 freq_range->max_bandwidth_khz);
2779 if (reg_rule->flags & NL80211_RRF_DFS)
2780 scnprintf(cac_time, sizeof(cac_time), "%u s",
2781 reg_rule->dfs_cac_ms/1000);
2783 scnprintf(cac_time, sizeof(cac_time), "N/A");
2787 * There may not be documentation for max antenna gain
2788 * in certain regions
2790 if (power_rule->max_antenna_gain)
2791 pr_info(" (%d KHz - %d KHz @ %s), (%d mBi, %d mBm), (%s)\n",
2792 freq_range->start_freq_khz,
2793 freq_range->end_freq_khz,
2795 power_rule->max_antenna_gain,
2796 power_rule->max_eirp,
2799 pr_info(" (%d KHz - %d KHz @ %s), (N/A, %d mBm), (%s)\n",
2800 freq_range->start_freq_khz,
2801 freq_range->end_freq_khz,
2803 power_rule->max_eirp,
2808 bool reg_supported_dfs_region(enum nl80211_dfs_regions dfs_region)
2810 switch (dfs_region) {
2811 case NL80211_DFS_UNSET:
2812 case NL80211_DFS_FCC:
2813 case NL80211_DFS_ETSI:
2814 case NL80211_DFS_JP:
2817 REG_DBG_PRINT("Ignoring uknown DFS master region: %d\n",
2823 static void print_regdomain(const struct ieee80211_regdomain *rd)
2825 struct regulatory_request *lr = get_last_request();
2827 if (is_intersected_alpha2(rd->alpha2)) {
2828 if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) {
2829 struct cfg80211_registered_device *rdev;
2830 rdev = cfg80211_rdev_by_wiphy_idx(lr->wiphy_idx);
2832 pr_info("Current regulatory domain updated by AP to: %c%c\n",
2833 rdev->country_ie_alpha2[0],
2834 rdev->country_ie_alpha2[1]);
2836 pr_info("Current regulatory domain intersected:\n");
2838 pr_info("Current regulatory domain intersected:\n");
2839 } else if (is_world_regdom(rd->alpha2)) {
2840 pr_info("World regulatory domain updated:\n");
2842 if (is_unknown_alpha2(rd->alpha2))
2843 pr_info("Regulatory domain changed to driver built-in settings (unknown country)\n");
2845 if (reg_request_cell_base(lr))
2846 pr_info("Regulatory domain changed to country: %c%c by Cell Station\n",
2847 rd->alpha2[0], rd->alpha2[1]);
2849 pr_info("Regulatory domain changed to country: %c%c\n",
2850 rd->alpha2[0], rd->alpha2[1]);
2854 pr_info(" DFS Master region: %s", reg_dfs_region_str(rd->dfs_region));
2858 static void print_regdomain_info(const struct ieee80211_regdomain *rd)
2860 pr_info("Regulatory domain: %c%c\n", rd->alpha2[0], rd->alpha2[1]);
2864 static int reg_set_rd_core(const struct ieee80211_regdomain *rd)
2866 if (!is_world_regdom(rd->alpha2))
2868 update_world_regdomain(rd);
2872 static int reg_set_rd_user(const struct ieee80211_regdomain *rd,
2873 struct regulatory_request *user_request)
2875 const struct ieee80211_regdomain *intersected_rd = NULL;
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 if (!user_request->intersect) {
2887 reset_regdomains(false, rd);
2891 intersected_rd = regdom_intersect(rd, get_cfg80211_regdom());
2892 if (!intersected_rd)
2897 reset_regdomains(false, intersected_rd);
2902 static int reg_set_rd_driver(const struct ieee80211_regdomain *rd,
2903 struct regulatory_request *driver_request)
2905 const struct ieee80211_regdomain *regd;
2906 const struct ieee80211_regdomain *intersected_rd = NULL;
2907 const struct ieee80211_regdomain *tmp;
2908 struct wiphy *request_wiphy;
2910 if (is_world_regdom(rd->alpha2))
2913 if (!regdom_changes(rd->alpha2))
2916 if (!is_valid_rd(rd)) {
2917 pr_err("Invalid regulatory domain detected:\n");
2918 print_regdomain_info(rd);
2922 request_wiphy = wiphy_idx_to_wiphy(driver_request->wiphy_idx);
2926 if (!driver_request->intersect) {
2927 if (request_wiphy->regd)
2930 regd = reg_copy_regd(rd);
2932 return PTR_ERR(regd);
2934 rcu_assign_pointer(request_wiphy->regd, regd);
2935 reset_regdomains(false, rd);
2939 intersected_rd = regdom_intersect(rd, get_cfg80211_regdom());
2940 if (!intersected_rd)
2944 * We can trash what CRDA provided now.
2945 * However if a driver requested this specific regulatory
2946 * domain we keep it for its private use
2948 tmp = get_wiphy_regdom(request_wiphy);
2949 rcu_assign_pointer(request_wiphy->regd, rd);
2950 rcu_free_regdom(tmp);
2954 reset_regdomains(false, intersected_rd);
2959 static int reg_set_rd_country_ie(const struct ieee80211_regdomain *rd,
2960 struct regulatory_request *country_ie_request)
2962 struct wiphy *request_wiphy;
2964 if (!is_alpha2_set(rd->alpha2) && !is_an_alpha2(rd->alpha2) &&
2965 !is_unknown_alpha2(rd->alpha2))
2969 * Lets only bother proceeding on the same alpha2 if the current
2970 * rd is non static (it means CRDA was present and was used last)
2971 * and the pending request came in from a country IE
2974 if (!is_valid_rd(rd)) {
2975 pr_err("Invalid regulatory domain detected:\n");
2976 print_regdomain_info(rd);
2980 request_wiphy = wiphy_idx_to_wiphy(country_ie_request->wiphy_idx);
2984 if (country_ie_request->intersect)
2987 reset_regdomains(false, rd);
2992 * Use this call to set the current regulatory domain. Conflicts with
2993 * multiple drivers can be ironed out later. Caller must've already
2994 * kmalloc'd the rd structure.
2996 int set_regdom(const struct ieee80211_regdomain *rd,
2997 enum ieee80211_regd_source regd_src)
2999 struct regulatory_request *lr;
3000 bool user_reset = false;
3003 if (!reg_is_valid_request(rd->alpha2)) {
3008 if (regd_src == REGD_SOURCE_CRDA)
3009 reset_crda_timeouts();
3011 lr = get_last_request();
3013 /* Note that this doesn't update the wiphys, this is done below */
3014 switch (lr->initiator) {
3015 case NL80211_REGDOM_SET_BY_CORE:
3016 r = reg_set_rd_core(rd);
3018 case NL80211_REGDOM_SET_BY_USER:
3019 r = reg_set_rd_user(rd, lr);
3022 case NL80211_REGDOM_SET_BY_DRIVER:
3023 r = reg_set_rd_driver(rd, lr);
3025 case NL80211_REGDOM_SET_BY_COUNTRY_IE:
3026 r = reg_set_rd_country_ie(rd, lr);
3029 WARN(1, "invalid initiator %d\n", lr->initiator);
3036 reg_set_request_processed();
3039 /* Back to world regulatory in case of errors */
3040 restore_regulatory_settings(user_reset);
3047 /* This would make this whole thing pointless */
3048 if (WARN_ON(!lr->intersect && rd != get_cfg80211_regdom()))
3051 /* update all wiphys now with the new established regulatory domain */
3052 update_all_wiphy_regulatory(lr->initiator);
3054 print_regdomain(get_cfg80211_regdom());
3056 nl80211_send_reg_change_event(lr);
3058 reg_set_request_processed();
3063 static int __regulatory_set_wiphy_regd(struct wiphy *wiphy,
3064 struct ieee80211_regdomain *rd)
3066 const struct ieee80211_regdomain *regd;
3067 const struct ieee80211_regdomain *prev_regd;
3068 struct cfg80211_registered_device *rdev;
3070 if (WARN_ON(!wiphy || !rd))
3073 if (WARN(!(wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED),
3074 "wiphy should have REGULATORY_WIPHY_SELF_MANAGED\n"))
3077 if (WARN(!is_valid_rd(rd), "Invalid regulatory domain detected\n")) {
3078 print_regdomain_info(rd);
3082 regd = reg_copy_regd(rd);
3084 return PTR_ERR(regd);
3086 rdev = wiphy_to_rdev(wiphy);
3088 spin_lock(®_requests_lock);
3089 prev_regd = rdev->requested_regd;
3090 rdev->requested_regd = regd;
3091 spin_unlock(®_requests_lock);
3097 int regulatory_set_wiphy_regd(struct wiphy *wiphy,
3098 struct ieee80211_regdomain *rd)
3100 int ret = __regulatory_set_wiphy_regd(wiphy, rd);
3105 schedule_work(®_work);
3108 EXPORT_SYMBOL(regulatory_set_wiphy_regd);
3110 int regulatory_set_wiphy_regd_sync_rtnl(struct wiphy *wiphy,
3111 struct ieee80211_regdomain *rd)
3117 ret = __regulatory_set_wiphy_regd(wiphy, rd);
3121 /* process the request immediately */
3122 reg_process_self_managed_hints();
3125 EXPORT_SYMBOL(regulatory_set_wiphy_regd_sync_rtnl);
3127 void wiphy_regulatory_register(struct wiphy *wiphy)
3129 struct regulatory_request *lr;
3131 /* self-managed devices ignore external hints */
3132 if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED)
3133 wiphy->regulatory_flags |= REGULATORY_DISABLE_BEACON_HINTS |
3134 REGULATORY_COUNTRY_IE_IGNORE;
3136 if (!reg_dev_ignore_cell_hint(wiphy))
3137 reg_num_devs_support_basehint++;
3139 lr = get_last_request();
3140 wiphy_update_regulatory(wiphy, lr->initiator);
3143 void wiphy_regulatory_deregister(struct wiphy *wiphy)
3145 struct wiphy *request_wiphy = NULL;
3146 struct regulatory_request *lr;
3148 lr = get_last_request();
3150 if (!reg_dev_ignore_cell_hint(wiphy))
3151 reg_num_devs_support_basehint--;
3153 rcu_free_regdom(get_wiphy_regdom(wiphy));
3154 RCU_INIT_POINTER(wiphy->regd, NULL);
3157 request_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx);
3159 if (!request_wiphy || request_wiphy != wiphy)
3162 lr->wiphy_idx = WIPHY_IDX_INVALID;
3163 lr->country_ie_env = ENVIRON_ANY;
3167 * See http://www.fcc.gov/document/5-ghz-unlicensed-spectrum-unii, for
3168 * UNII band definitions
3170 int cfg80211_get_unii(int freq)
3173 if (freq >= 5150 && freq <= 5250)
3177 if (freq > 5250 && freq <= 5350)
3181 if (freq > 5350 && freq <= 5470)
3185 if (freq > 5470 && freq <= 5725)
3189 if (freq > 5725 && freq <= 5825)
3195 bool regulatory_indoor_allowed(void)
3197 return reg_is_indoor;
3200 int __init regulatory_init(void)
3204 reg_pdev = platform_device_register_simple("regulatory", 0, NULL, 0);
3205 if (IS_ERR(reg_pdev))
3206 return PTR_ERR(reg_pdev);
3208 spin_lock_init(®_requests_lock);
3209 spin_lock_init(®_pending_beacons_lock);
3210 spin_lock_init(®_indoor_lock);
3212 reg_regdb_size_check();
3214 rcu_assign_pointer(cfg80211_regdomain, cfg80211_world_regdom);
3216 user_alpha2[0] = '9';
3217 user_alpha2[1] = '7';
3219 /* We always try to get an update for the static regdomain */
3220 err = regulatory_hint_core(cfg80211_world_regdom->alpha2);
3225 * N.B. kobject_uevent_env() can fail mainly for when we're out
3226 * memory which is handled and propagated appropriately above
3227 * but it can also fail during a netlink_broadcast() or during
3228 * early boot for call_usermodehelper(). For now treat these
3229 * errors as non-fatal.
3231 pr_err("kobject_uevent_env() was unable to call CRDA during init\n");
3235 * Finally, if the user set the module parameter treat it
3238 if (!is_world_regdom(ieee80211_regdom))
3239 regulatory_hint_user(ieee80211_regdom,
3240 NL80211_USER_REG_HINT_USER);
3245 void regulatory_exit(void)
3247 struct regulatory_request *reg_request, *tmp;
3248 struct reg_beacon *reg_beacon, *btmp;
3250 cancel_work_sync(®_work);
3251 cancel_crda_timeout_sync();
3252 cancel_delayed_work_sync(®_check_chans);
3254 /* Lock to suppress warnings */
3256 reset_regdomains(true, NULL);
3259 dev_set_uevent_suppress(®_pdev->dev, true);
3261 platform_device_unregister(reg_pdev);
3263 list_for_each_entry_safe(reg_beacon, btmp, ®_pending_beacons, list) {
3264 list_del(®_beacon->list);
3268 list_for_each_entry_safe(reg_beacon, btmp, ®_beacon_list, list) {
3269 list_del(®_beacon->list);
3273 list_for_each_entry_safe(reg_request, tmp, ®_requests_list, list) {
3274 list_del(®_request->list);