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
7 * Copyright 2017 Intel Deutschland GmbH
9 * Permission to use, copy, modify, and/or distribute this software for any
10 * purpose with or without fee is hereby granted, provided that the above
11 * copyright notice and this permission notice appear in all copies.
13 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
14 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
15 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
16 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
17 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
18 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
19 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
24 * DOC: Wireless regulatory infrastructure
26 * The usual implementation is for a driver to read a device EEPROM to
27 * determine which regulatory domain it should be operating under, then
28 * looking up the allowable channels in a driver-local table and finally
29 * registering those channels in the wiphy structure.
31 * Another set of compliance enforcement is for drivers to use their
32 * own compliance limits which can be stored on the EEPROM. The host
33 * driver or firmware may ensure these are used.
35 * In addition to all this we provide an extra layer of regulatory
36 * conformance. For drivers which do not have any regulatory
37 * information CRDA provides the complete regulatory solution.
38 * For others it provides a community effort on further restrictions
39 * to enhance compliance.
41 * Note: When number of rules --> infinity we will not be able to
42 * index on alpha2 any more, instead we'll probably have to
43 * rely on some SHA1 checksum of the regdomain for example.
47 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
49 #include <linux/kernel.h>
50 #include <linux/export.h>
51 #include <linux/slab.h>
52 #include <linux/list.h>
53 #include <linux/ctype.h>
54 #include <linux/nl80211.h>
55 #include <linux/platform_device.h>
56 #include <linux/moduleparam.h>
57 #include <net/cfg80211.h>
65 * Grace period we give before making sure all current interfaces reside on
66 * channels allowed by the current regulatory domain.
68 #define REG_ENFORCE_GRACE_MS 60000
71 * enum reg_request_treatment - regulatory request treatment
73 * @REG_REQ_OK: continue processing the regulatory request
74 * @REG_REQ_IGNORE: ignore the regulatory request
75 * @REG_REQ_INTERSECT: the regulatory domain resulting from this request should
76 * be intersected with the current one.
77 * @REG_REQ_ALREADY_SET: the regulatory request will not change the current
78 * regulatory settings, and no further processing is required.
80 enum reg_request_treatment {
87 static struct regulatory_request core_request_world = {
88 .initiator = NL80211_REGDOM_SET_BY_CORE,
93 .country_ie_env = ENVIRON_ANY,
97 * Receipt of information from last regulatory request,
98 * protected by RTNL (and can be accessed with RCU protection)
100 static struct regulatory_request __rcu *last_request =
101 (void __force __rcu *)&core_request_world;
103 /* To trigger userspace events */
104 static struct platform_device *reg_pdev;
107 * Central wireless core regulatory domains, we only need two,
108 * the current one and a world regulatory domain in case we have no
109 * information to give us an alpha2.
110 * (protected by RTNL, can be read under RCU)
112 const struct ieee80211_regdomain __rcu *cfg80211_regdomain;
115 * Number of devices that registered to the core
116 * that support cellular base station regulatory hints
117 * (protected by RTNL)
119 static int reg_num_devs_support_basehint;
122 * State variable indicating if the platform on which the devices
123 * are attached is operating in an indoor environment. The state variable
124 * is relevant for all registered devices.
126 static bool reg_is_indoor;
127 static spinlock_t reg_indoor_lock;
129 /* Used to track the userspace process controlling the indoor setting */
130 static u32 reg_is_indoor_portid;
132 static void restore_regulatory_settings(bool reset_user);
134 static const struct ieee80211_regdomain *get_cfg80211_regdom(void)
136 return rtnl_dereference(cfg80211_regdomain);
139 const struct ieee80211_regdomain *get_wiphy_regdom(struct wiphy *wiphy)
141 return rtnl_dereference(wiphy->regd);
144 static const char *reg_dfs_region_str(enum nl80211_dfs_regions dfs_region)
146 switch (dfs_region) {
147 case NL80211_DFS_UNSET:
149 case NL80211_DFS_FCC:
151 case NL80211_DFS_ETSI:
159 enum nl80211_dfs_regions reg_get_dfs_region(struct wiphy *wiphy)
161 const struct ieee80211_regdomain *regd = NULL;
162 const struct ieee80211_regdomain *wiphy_regd = NULL;
164 regd = get_cfg80211_regdom();
168 wiphy_regd = get_wiphy_regdom(wiphy);
172 if (wiphy_regd->dfs_region == regd->dfs_region)
175 pr_debug("%s: device specific dfs_region (%s) disagrees with cfg80211's central dfs_region (%s)\n",
176 dev_name(&wiphy->dev),
177 reg_dfs_region_str(wiphy_regd->dfs_region),
178 reg_dfs_region_str(regd->dfs_region));
181 return regd->dfs_region;
184 static void rcu_free_regdom(const struct ieee80211_regdomain *r)
188 kfree_rcu((struct ieee80211_regdomain *)r, rcu_head);
191 static struct regulatory_request *get_last_request(void)
193 return rcu_dereference_rtnl(last_request);
196 /* Used to queue up regulatory hints */
197 static LIST_HEAD(reg_requests_list);
198 static spinlock_t reg_requests_lock;
200 /* Used to queue up beacon hints for review */
201 static LIST_HEAD(reg_pending_beacons);
202 static spinlock_t reg_pending_beacons_lock;
204 /* Used to keep track of processed beacon hints */
205 static LIST_HEAD(reg_beacon_list);
208 struct list_head list;
209 struct ieee80211_channel chan;
212 static void reg_check_chans_work(struct work_struct *work);
213 static DECLARE_DELAYED_WORK(reg_check_chans, reg_check_chans_work);
215 static void reg_todo(struct work_struct *work);
216 static DECLARE_WORK(reg_work, reg_todo);
218 /* We keep a static world regulatory domain in case of the absence of CRDA */
219 static const struct ieee80211_regdomain world_regdom = {
223 /* IEEE 802.11b/g, channels 1..11 */
224 REG_RULE(2412-10, 2462+10, 40, 6, 20, 0),
225 /* IEEE 802.11b/g, channels 12..13. */
226 REG_RULE(2467-10, 2472+10, 20, 6, 20,
227 NL80211_RRF_NO_IR | NL80211_RRF_AUTO_BW),
228 /* IEEE 802.11 channel 14 - Only JP enables
229 * this and for 802.11b only */
230 REG_RULE(2484-10, 2484+10, 20, 6, 20,
232 NL80211_RRF_NO_OFDM),
233 /* IEEE 802.11a, channel 36..48 */
234 REG_RULE(5180-10, 5240+10, 80, 6, 20,
236 NL80211_RRF_AUTO_BW),
238 /* IEEE 802.11a, channel 52..64 - DFS required */
239 REG_RULE(5260-10, 5320+10, 80, 6, 20,
241 NL80211_RRF_AUTO_BW |
244 /* IEEE 802.11a, channel 100..144 - DFS required */
245 REG_RULE(5500-10, 5720+10, 160, 6, 20,
249 /* IEEE 802.11a, channel 149..165 */
250 REG_RULE(5745-10, 5825+10, 80, 6, 20,
253 /* IEEE 802.11ad (60GHz), channels 1..3 */
254 REG_RULE(56160+2160*1-1080, 56160+2160*3+1080, 2160, 0, 0, 0),
258 /* protected by RTNL */
259 static const struct ieee80211_regdomain *cfg80211_world_regdom =
262 static char *ieee80211_regdom = "00";
263 static char user_alpha2[2];
265 module_param(ieee80211_regdom, charp, 0444);
266 MODULE_PARM_DESC(ieee80211_regdom, "IEEE 802.11 regulatory domain code");
268 static void reg_free_request(struct regulatory_request *request)
270 if (request == &core_request_world)
273 if (request != get_last_request())
277 static void reg_free_last_request(void)
279 struct regulatory_request *lr = get_last_request();
281 if (lr != &core_request_world && lr)
282 kfree_rcu(lr, rcu_head);
285 static void reg_update_last_request(struct regulatory_request *request)
287 struct regulatory_request *lr;
289 lr = get_last_request();
293 reg_free_last_request();
294 rcu_assign_pointer(last_request, request);
297 static void reset_regdomains(bool full_reset,
298 const struct ieee80211_regdomain *new_regdom)
300 const struct ieee80211_regdomain *r;
304 r = get_cfg80211_regdom();
306 /* avoid freeing static information or freeing something twice */
307 if (r == cfg80211_world_regdom)
309 if (cfg80211_world_regdom == &world_regdom)
310 cfg80211_world_regdom = NULL;
311 if (r == &world_regdom)
315 rcu_free_regdom(cfg80211_world_regdom);
317 cfg80211_world_regdom = &world_regdom;
318 rcu_assign_pointer(cfg80211_regdomain, new_regdom);
323 reg_update_last_request(&core_request_world);
327 * Dynamic world regulatory domain requested by the wireless
328 * core upon initialization
330 static void update_world_regdomain(const struct ieee80211_regdomain *rd)
332 struct regulatory_request *lr;
334 lr = get_last_request();
338 reset_regdomains(false, rd);
340 cfg80211_world_regdom = rd;
343 bool is_world_regdom(const char *alpha2)
347 return alpha2[0] == '0' && alpha2[1] == '0';
350 static bool is_alpha2_set(const char *alpha2)
354 return alpha2[0] && alpha2[1];
357 static bool is_unknown_alpha2(const char *alpha2)
362 * Special case where regulatory domain was built by driver
363 * but a specific alpha2 cannot be determined
365 return alpha2[0] == '9' && alpha2[1] == '9';
368 static bool is_intersected_alpha2(const char *alpha2)
373 * Special case where regulatory domain is the
374 * result of an intersection between two regulatory domain
377 return alpha2[0] == '9' && alpha2[1] == '8';
380 static bool is_an_alpha2(const char *alpha2)
384 return isalpha(alpha2[0]) && isalpha(alpha2[1]);
387 static bool alpha2_equal(const char *alpha2_x, const char *alpha2_y)
389 if (!alpha2_x || !alpha2_y)
391 return alpha2_x[0] == alpha2_y[0] && alpha2_x[1] == alpha2_y[1];
394 static bool regdom_changes(const char *alpha2)
396 const struct ieee80211_regdomain *r = get_cfg80211_regdom();
400 return !alpha2_equal(r->alpha2, alpha2);
404 * The NL80211_REGDOM_SET_BY_USER regdom alpha2 is cached, this lets
405 * you know if a valid regulatory hint with NL80211_REGDOM_SET_BY_USER
406 * has ever been issued.
408 static bool is_user_regdom_saved(void)
410 if (user_alpha2[0] == '9' && user_alpha2[1] == '7')
413 /* This would indicate a mistake on the design */
414 if (WARN(!is_world_regdom(user_alpha2) && !is_an_alpha2(user_alpha2),
415 "Unexpected user alpha2: %c%c\n",
416 user_alpha2[0], user_alpha2[1]))
422 static const struct ieee80211_regdomain *
423 reg_copy_regd(const struct ieee80211_regdomain *src_regd)
425 struct ieee80211_regdomain *regd;
430 sizeof(struct ieee80211_regdomain) +
431 src_regd->n_reg_rules * sizeof(struct ieee80211_reg_rule);
433 regd = kzalloc(size_of_regd, GFP_KERNEL);
435 return ERR_PTR(-ENOMEM);
437 memcpy(regd, src_regd, sizeof(struct ieee80211_regdomain));
439 for (i = 0; i < src_regd->n_reg_rules; i++)
440 memcpy(®d->reg_rules[i], &src_regd->reg_rules[i],
441 sizeof(struct ieee80211_reg_rule));
446 #ifdef CONFIG_CFG80211_INTERNAL_REGDB
447 struct reg_regdb_apply_request {
448 struct list_head list;
449 const struct ieee80211_regdomain *regdom;
452 static LIST_HEAD(reg_regdb_apply_list);
453 static DEFINE_MUTEX(reg_regdb_apply_mutex);
455 static void reg_regdb_apply(struct work_struct *work)
457 struct reg_regdb_apply_request *request;
461 mutex_lock(®_regdb_apply_mutex);
462 while (!list_empty(®_regdb_apply_list)) {
463 request = list_first_entry(®_regdb_apply_list,
464 struct reg_regdb_apply_request,
466 list_del(&request->list);
468 set_regdom(request->regdom, REGD_SOURCE_INTERNAL_DB);
471 mutex_unlock(®_regdb_apply_mutex);
476 static DECLARE_WORK(reg_regdb_work, reg_regdb_apply);
478 static int reg_query_builtin(const char *alpha2)
480 const struct ieee80211_regdomain *regdom = NULL;
481 struct reg_regdb_apply_request *request;
484 for (i = 0; i < reg_regdb_size; i++) {
485 if (alpha2_equal(alpha2, reg_regdb[i]->alpha2)) {
486 regdom = reg_regdb[i];
494 request = kzalloc(sizeof(struct reg_regdb_apply_request), GFP_KERNEL);
498 request->regdom = reg_copy_regd(regdom);
499 if (IS_ERR_OR_NULL(request->regdom)) {
504 mutex_lock(®_regdb_apply_mutex);
505 list_add_tail(&request->list, ®_regdb_apply_list);
506 mutex_unlock(®_regdb_apply_mutex);
508 schedule_work(®_regdb_work);
513 /* Feel free to add any other sanity checks here */
514 static void reg_regdb_size_check(void)
516 /* We should ideally BUILD_BUG_ON() but then random builds would fail */
517 WARN_ONCE(!reg_regdb_size, "db.txt is empty, you should update it...");
520 static inline void reg_regdb_size_check(void) {}
521 static inline int reg_query_builtin(const char *alpha2)
525 #endif /* CONFIG_CFG80211_INTERNAL_REGDB */
527 #ifdef CONFIG_CFG80211_CRDA_SUPPORT
528 /* Max number of consecutive attempts to communicate with CRDA */
529 #define REG_MAX_CRDA_TIMEOUTS 10
531 static u32 reg_crda_timeouts;
533 static void crda_timeout_work(struct work_struct *work);
534 static DECLARE_DELAYED_WORK(crda_timeout, crda_timeout_work);
536 static void crda_timeout_work(struct work_struct *work)
538 pr_debug("Timeout while waiting for CRDA to reply, restoring regulatory settings\n");
541 restore_regulatory_settings(true);
545 static void cancel_crda_timeout(void)
547 cancel_delayed_work(&crda_timeout);
550 static void cancel_crda_timeout_sync(void)
552 cancel_delayed_work_sync(&crda_timeout);
555 static void reset_crda_timeouts(void)
557 reg_crda_timeouts = 0;
561 * This lets us keep regulatory code which is updated on a regulatory
562 * basis in userspace.
564 static int call_crda(const char *alpha2)
567 char *env[] = { country, NULL };
570 snprintf(country, sizeof(country), "COUNTRY=%c%c",
571 alpha2[0], alpha2[1]);
573 if (reg_crda_timeouts > REG_MAX_CRDA_TIMEOUTS) {
574 pr_debug("Exceeded CRDA call max attempts. Not calling CRDA\n");
578 if (!is_world_regdom((char *) alpha2))
579 pr_debug("Calling CRDA for country: %c%c\n",
580 alpha2[0], alpha2[1]);
582 pr_debug("Calling CRDA to update world regulatory domain\n");
584 ret = kobject_uevent_env(®_pdev->dev.kobj, KOBJ_CHANGE, env);
588 queue_delayed_work(system_power_efficient_wq,
589 &crda_timeout, msecs_to_jiffies(3142));
593 static inline void cancel_crda_timeout(void) {}
594 static inline void cancel_crda_timeout_sync(void) {}
595 static inline void reset_crda_timeouts(void) {}
596 static inline int call_crda(const char *alpha2)
600 #endif /* CONFIG_CFG80211_CRDA_SUPPORT */
602 static bool reg_query_database(struct regulatory_request *request)
604 /* query internal regulatory database (if it exists) */
605 if (reg_query_builtin(request->alpha2) == 0)
608 if (call_crda(request->alpha2) == 0)
614 bool reg_is_valid_request(const char *alpha2)
616 struct regulatory_request *lr = get_last_request();
618 if (!lr || lr->processed)
621 return alpha2_equal(lr->alpha2, alpha2);
624 static const struct ieee80211_regdomain *reg_get_regdomain(struct wiphy *wiphy)
626 struct regulatory_request *lr = get_last_request();
629 * Follow the driver's regulatory domain, if present, unless a country
630 * IE has been processed or a user wants to help complaince further
632 if (lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE &&
633 lr->initiator != NL80211_REGDOM_SET_BY_USER &&
635 return get_wiphy_regdom(wiphy);
637 return get_cfg80211_regdom();
641 reg_get_max_bandwidth_from_range(const struct ieee80211_regdomain *rd,
642 const struct ieee80211_reg_rule *rule)
644 const struct ieee80211_freq_range *freq_range = &rule->freq_range;
645 const struct ieee80211_freq_range *freq_range_tmp;
646 const struct ieee80211_reg_rule *tmp;
647 u32 start_freq, end_freq, idx, no;
649 for (idx = 0; idx < rd->n_reg_rules; idx++)
650 if (rule == &rd->reg_rules[idx])
653 if (idx == rd->n_reg_rules)
660 tmp = &rd->reg_rules[--no];
661 freq_range_tmp = &tmp->freq_range;
663 if (freq_range_tmp->end_freq_khz < freq_range->start_freq_khz)
666 freq_range = freq_range_tmp;
669 start_freq = freq_range->start_freq_khz;
672 freq_range = &rule->freq_range;
675 while (no < rd->n_reg_rules - 1) {
676 tmp = &rd->reg_rules[++no];
677 freq_range_tmp = &tmp->freq_range;
679 if (freq_range_tmp->start_freq_khz > freq_range->end_freq_khz)
682 freq_range = freq_range_tmp;
685 end_freq = freq_range->end_freq_khz;
687 return end_freq - start_freq;
690 unsigned int reg_get_max_bandwidth(const struct ieee80211_regdomain *rd,
691 const struct ieee80211_reg_rule *rule)
693 unsigned int bw = reg_get_max_bandwidth_from_range(rd, rule);
695 if (rule->flags & NL80211_RRF_NO_160MHZ)
696 bw = min_t(unsigned int, bw, MHZ_TO_KHZ(80));
697 if (rule->flags & NL80211_RRF_NO_80MHZ)
698 bw = min_t(unsigned int, bw, MHZ_TO_KHZ(40));
701 * HT40+/HT40- limits are handled per-channel. Only limit BW if both
704 if (rule->flags & NL80211_RRF_NO_HT40MINUS &&
705 rule->flags & NL80211_RRF_NO_HT40PLUS)
706 bw = min_t(unsigned int, bw, MHZ_TO_KHZ(20));
711 /* Sanity check on a regulatory rule */
712 static bool is_valid_reg_rule(const struct ieee80211_reg_rule *rule)
714 const struct ieee80211_freq_range *freq_range = &rule->freq_range;
717 if (freq_range->start_freq_khz <= 0 || freq_range->end_freq_khz <= 0)
720 if (freq_range->start_freq_khz > freq_range->end_freq_khz)
723 freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz;
725 if (freq_range->end_freq_khz <= freq_range->start_freq_khz ||
726 freq_range->max_bandwidth_khz > freq_diff)
732 static bool is_valid_rd(const struct ieee80211_regdomain *rd)
734 const struct ieee80211_reg_rule *reg_rule = NULL;
737 if (!rd->n_reg_rules)
740 if (WARN_ON(rd->n_reg_rules > NL80211_MAX_SUPP_REG_RULES))
743 for (i = 0; i < rd->n_reg_rules; i++) {
744 reg_rule = &rd->reg_rules[i];
745 if (!is_valid_reg_rule(reg_rule))
753 * freq_in_rule_band - tells us if a frequency is in a frequency band
754 * @freq_range: frequency rule we want to query
755 * @freq_khz: frequency we are inquiring about
757 * This lets us know if a specific frequency rule is or is not relevant to
758 * a specific frequency's band. Bands are device specific and artificial
759 * definitions (the "2.4 GHz band", the "5 GHz band" and the "60GHz band"),
760 * however it is safe for now to assume that a frequency rule should not be
761 * part of a frequency's band if the start freq or end freq are off by more
762 * than 2 GHz for the 2.4 and 5 GHz bands, and by more than 10 GHz for the
764 * This resolution can be lowered and should be considered as we add
765 * regulatory rule support for other "bands".
767 static bool freq_in_rule_band(const struct ieee80211_freq_range *freq_range,
770 #define ONE_GHZ_IN_KHZ 1000000
772 * From 802.11ad: directional multi-gigabit (DMG):
773 * Pertaining to operation in a frequency band containing a channel
774 * with the Channel starting frequency above 45 GHz.
776 u32 limit = freq_khz > 45 * ONE_GHZ_IN_KHZ ?
777 10 * ONE_GHZ_IN_KHZ : 2 * ONE_GHZ_IN_KHZ;
778 if (abs(freq_khz - freq_range->start_freq_khz) <= limit)
780 if (abs(freq_khz - freq_range->end_freq_khz) <= limit)
783 #undef ONE_GHZ_IN_KHZ
787 * Later on we can perhaps use the more restrictive DFS
788 * region but we don't have information for that yet so
789 * for now simply disallow conflicts.
791 static enum nl80211_dfs_regions
792 reg_intersect_dfs_region(const enum nl80211_dfs_regions dfs_region1,
793 const enum nl80211_dfs_regions dfs_region2)
795 if (dfs_region1 != dfs_region2)
796 return NL80211_DFS_UNSET;
801 * Helper for regdom_intersect(), this does the real
802 * mathematical intersection fun
804 static int reg_rules_intersect(const struct ieee80211_regdomain *rd1,
805 const struct ieee80211_regdomain *rd2,
806 const struct ieee80211_reg_rule *rule1,
807 const struct ieee80211_reg_rule *rule2,
808 struct ieee80211_reg_rule *intersected_rule)
810 const struct ieee80211_freq_range *freq_range1, *freq_range2;
811 struct ieee80211_freq_range *freq_range;
812 const struct ieee80211_power_rule *power_rule1, *power_rule2;
813 struct ieee80211_power_rule *power_rule;
814 u32 freq_diff, max_bandwidth1, max_bandwidth2;
816 freq_range1 = &rule1->freq_range;
817 freq_range2 = &rule2->freq_range;
818 freq_range = &intersected_rule->freq_range;
820 power_rule1 = &rule1->power_rule;
821 power_rule2 = &rule2->power_rule;
822 power_rule = &intersected_rule->power_rule;
824 freq_range->start_freq_khz = max(freq_range1->start_freq_khz,
825 freq_range2->start_freq_khz);
826 freq_range->end_freq_khz = min(freq_range1->end_freq_khz,
827 freq_range2->end_freq_khz);
829 max_bandwidth1 = freq_range1->max_bandwidth_khz;
830 max_bandwidth2 = freq_range2->max_bandwidth_khz;
832 if (rule1->flags & NL80211_RRF_AUTO_BW)
833 max_bandwidth1 = reg_get_max_bandwidth(rd1, rule1);
834 if (rule2->flags & NL80211_RRF_AUTO_BW)
835 max_bandwidth2 = reg_get_max_bandwidth(rd2, rule2);
837 freq_range->max_bandwidth_khz = min(max_bandwidth1, max_bandwidth2);
839 intersected_rule->flags = rule1->flags | rule2->flags;
842 * In case NL80211_RRF_AUTO_BW requested for both rules
843 * set AUTO_BW in intersected rule also. Next we will
844 * calculate BW correctly in handle_channel function.
845 * In other case remove AUTO_BW flag while we calculate
846 * maximum bandwidth correctly and auto calculation is
849 if ((rule1->flags & NL80211_RRF_AUTO_BW) &&
850 (rule2->flags & NL80211_RRF_AUTO_BW))
851 intersected_rule->flags |= NL80211_RRF_AUTO_BW;
853 intersected_rule->flags &= ~NL80211_RRF_AUTO_BW;
855 freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz;
856 if (freq_range->max_bandwidth_khz > freq_diff)
857 freq_range->max_bandwidth_khz = freq_diff;
859 power_rule->max_eirp = min(power_rule1->max_eirp,
860 power_rule2->max_eirp);
861 power_rule->max_antenna_gain = min(power_rule1->max_antenna_gain,
862 power_rule2->max_antenna_gain);
864 intersected_rule->dfs_cac_ms = max(rule1->dfs_cac_ms,
867 if (!is_valid_reg_rule(intersected_rule))
873 /* check whether old rule contains new rule */
874 static bool rule_contains(struct ieee80211_reg_rule *r1,
875 struct ieee80211_reg_rule *r2)
877 /* for simplicity, currently consider only same flags */
878 if (r1->flags != r2->flags)
881 /* verify r1 is more restrictive */
882 if ((r1->power_rule.max_antenna_gain >
883 r2->power_rule.max_antenna_gain) ||
884 r1->power_rule.max_eirp > r2->power_rule.max_eirp)
887 /* make sure r2's range is contained within r1 */
888 if (r1->freq_range.start_freq_khz > r2->freq_range.start_freq_khz ||
889 r1->freq_range.end_freq_khz < r2->freq_range.end_freq_khz)
892 /* and finally verify that r1.max_bw >= r2.max_bw */
893 if (r1->freq_range.max_bandwidth_khz <
894 r2->freq_range.max_bandwidth_khz)
900 /* add or extend current rules. do nothing if rule is already contained */
901 static void add_rule(struct ieee80211_reg_rule *rule,
902 struct ieee80211_reg_rule *reg_rules, u32 *n_rules)
904 struct ieee80211_reg_rule *tmp_rule;
907 for (i = 0; i < *n_rules; i++) {
908 tmp_rule = ®_rules[i];
909 /* rule is already contained - do nothing */
910 if (rule_contains(tmp_rule, rule))
913 /* extend rule if possible */
914 if (rule_contains(rule, tmp_rule)) {
915 memcpy(tmp_rule, rule, sizeof(*rule));
920 memcpy(®_rules[*n_rules], rule, sizeof(*rule));
925 * regdom_intersect - do the intersection between two regulatory domains
926 * @rd1: first regulatory domain
927 * @rd2: second regulatory domain
929 * Use this function to get the intersection between two regulatory domains.
930 * Once completed we will mark the alpha2 for the rd as intersected, "98",
931 * as no one single alpha2 can represent this regulatory domain.
933 * Returns a pointer to the regulatory domain structure which will hold the
934 * resulting intersection of rules between rd1 and rd2. We will
935 * kzalloc() this structure for you.
937 static struct ieee80211_regdomain *
938 regdom_intersect(const struct ieee80211_regdomain *rd1,
939 const struct ieee80211_regdomain *rd2)
943 unsigned int num_rules = 0;
944 const struct ieee80211_reg_rule *rule1, *rule2;
945 struct ieee80211_reg_rule intersected_rule;
946 struct ieee80211_regdomain *rd;
952 * First we get a count of the rules we'll need, then we actually
953 * build them. This is to so we can malloc() and free() a
954 * regdomain once. The reason we use reg_rules_intersect() here
955 * is it will return -EINVAL if the rule computed makes no sense.
956 * All rules that do check out OK are valid.
959 for (x = 0; x < rd1->n_reg_rules; x++) {
960 rule1 = &rd1->reg_rules[x];
961 for (y = 0; y < rd2->n_reg_rules; y++) {
962 rule2 = &rd2->reg_rules[y];
963 if (!reg_rules_intersect(rd1, rd2, rule1, rule2,
972 size_of_regd = sizeof(struct ieee80211_regdomain) +
973 num_rules * sizeof(struct ieee80211_reg_rule);
975 rd = kzalloc(size_of_regd, GFP_KERNEL);
979 for (x = 0; x < rd1->n_reg_rules; x++) {
980 rule1 = &rd1->reg_rules[x];
981 for (y = 0; y < rd2->n_reg_rules; y++) {
982 rule2 = &rd2->reg_rules[y];
983 r = reg_rules_intersect(rd1, rd2, rule1, rule2,
986 * No need to memset here the intersected rule here as
987 * we're not using the stack anymore
992 add_rule(&intersected_rule, rd->reg_rules,
999 rd->dfs_region = reg_intersect_dfs_region(rd1->dfs_region,
1006 * XXX: add support for the rest of enum nl80211_reg_rule_flags, we may
1007 * want to just have the channel structure use these
1009 static u32 map_regdom_flags(u32 rd_flags)
1011 u32 channel_flags = 0;
1012 if (rd_flags & NL80211_RRF_NO_IR_ALL)
1013 channel_flags |= IEEE80211_CHAN_NO_IR;
1014 if (rd_flags & NL80211_RRF_DFS)
1015 channel_flags |= IEEE80211_CHAN_RADAR;
1016 if (rd_flags & NL80211_RRF_NO_OFDM)
1017 channel_flags |= IEEE80211_CHAN_NO_OFDM;
1018 if (rd_flags & NL80211_RRF_NO_OUTDOOR)
1019 channel_flags |= IEEE80211_CHAN_INDOOR_ONLY;
1020 if (rd_flags & NL80211_RRF_IR_CONCURRENT)
1021 channel_flags |= IEEE80211_CHAN_IR_CONCURRENT;
1022 if (rd_flags & NL80211_RRF_NO_HT40MINUS)
1023 channel_flags |= IEEE80211_CHAN_NO_HT40MINUS;
1024 if (rd_flags & NL80211_RRF_NO_HT40PLUS)
1025 channel_flags |= IEEE80211_CHAN_NO_HT40PLUS;
1026 if (rd_flags & NL80211_RRF_NO_80MHZ)
1027 channel_flags |= IEEE80211_CHAN_NO_80MHZ;
1028 if (rd_flags & NL80211_RRF_NO_160MHZ)
1029 channel_flags |= IEEE80211_CHAN_NO_160MHZ;
1030 return channel_flags;
1033 static const struct ieee80211_reg_rule *
1034 freq_reg_info_regd(u32 center_freq,
1035 const struct ieee80211_regdomain *regd, u32 bw)
1038 bool band_rule_found = false;
1039 bool bw_fits = false;
1042 return ERR_PTR(-EINVAL);
1044 for (i = 0; i < regd->n_reg_rules; i++) {
1045 const struct ieee80211_reg_rule *rr;
1046 const struct ieee80211_freq_range *fr = NULL;
1048 rr = ®d->reg_rules[i];
1049 fr = &rr->freq_range;
1052 * We only need to know if one frequency rule was
1053 * was in center_freq's band, that's enough, so lets
1054 * not overwrite it once found
1056 if (!band_rule_found)
1057 band_rule_found = freq_in_rule_band(fr, center_freq);
1059 bw_fits = cfg80211_does_bw_fit_range(fr, center_freq, bw);
1061 if (band_rule_found && bw_fits)
1065 if (!band_rule_found)
1066 return ERR_PTR(-ERANGE);
1068 return ERR_PTR(-EINVAL);
1071 static const struct ieee80211_reg_rule *
1072 __freq_reg_info(struct wiphy *wiphy, u32 center_freq, u32 min_bw)
1074 const struct ieee80211_regdomain *regd = reg_get_regdomain(wiphy);
1075 const struct ieee80211_reg_rule *reg_rule = NULL;
1078 for (bw = MHZ_TO_KHZ(20); bw >= min_bw; bw = bw / 2) {
1079 reg_rule = freq_reg_info_regd(center_freq, regd, bw);
1080 if (!IS_ERR(reg_rule))
1087 const struct ieee80211_reg_rule *freq_reg_info(struct wiphy *wiphy,
1090 return __freq_reg_info(wiphy, center_freq, MHZ_TO_KHZ(20));
1092 EXPORT_SYMBOL(freq_reg_info);
1094 const char *reg_initiator_name(enum nl80211_reg_initiator initiator)
1096 switch (initiator) {
1097 case NL80211_REGDOM_SET_BY_CORE:
1099 case NL80211_REGDOM_SET_BY_USER:
1101 case NL80211_REGDOM_SET_BY_DRIVER:
1103 case NL80211_REGDOM_SET_BY_COUNTRY_IE:
1104 return "country IE";
1110 EXPORT_SYMBOL(reg_initiator_name);
1112 static uint32_t reg_rule_to_chan_bw_flags(const struct ieee80211_regdomain *regd,
1113 const struct ieee80211_reg_rule *reg_rule,
1114 const struct ieee80211_channel *chan)
1116 const struct ieee80211_freq_range *freq_range = NULL;
1117 u32 max_bandwidth_khz, bw_flags = 0;
1119 freq_range = ®_rule->freq_range;
1121 max_bandwidth_khz = freq_range->max_bandwidth_khz;
1122 /* Check if auto calculation requested */
1123 if (reg_rule->flags & NL80211_RRF_AUTO_BW)
1124 max_bandwidth_khz = reg_get_max_bandwidth(regd, reg_rule);
1126 /* If we get a reg_rule we can assume that at least 5Mhz fit */
1127 if (!cfg80211_does_bw_fit_range(freq_range,
1128 MHZ_TO_KHZ(chan->center_freq),
1130 bw_flags |= IEEE80211_CHAN_NO_10MHZ;
1131 if (!cfg80211_does_bw_fit_range(freq_range,
1132 MHZ_TO_KHZ(chan->center_freq),
1134 bw_flags |= IEEE80211_CHAN_NO_20MHZ;
1136 if (max_bandwidth_khz < MHZ_TO_KHZ(10))
1137 bw_flags |= IEEE80211_CHAN_NO_10MHZ;
1138 if (max_bandwidth_khz < MHZ_TO_KHZ(20))
1139 bw_flags |= IEEE80211_CHAN_NO_20MHZ;
1140 if (max_bandwidth_khz < MHZ_TO_KHZ(40))
1141 bw_flags |= IEEE80211_CHAN_NO_HT40;
1142 if (max_bandwidth_khz < MHZ_TO_KHZ(80))
1143 bw_flags |= IEEE80211_CHAN_NO_80MHZ;
1144 if (max_bandwidth_khz < MHZ_TO_KHZ(160))
1145 bw_flags |= IEEE80211_CHAN_NO_160MHZ;
1150 * Note that right now we assume the desired channel bandwidth
1151 * is always 20 MHz for each individual channel (HT40 uses 20 MHz
1152 * per channel, the primary and the extension channel).
1154 static void handle_channel(struct wiphy *wiphy,
1155 enum nl80211_reg_initiator initiator,
1156 struct ieee80211_channel *chan)
1158 u32 flags, bw_flags = 0;
1159 const struct ieee80211_reg_rule *reg_rule = NULL;
1160 const struct ieee80211_power_rule *power_rule = NULL;
1161 struct wiphy *request_wiphy = NULL;
1162 struct regulatory_request *lr = get_last_request();
1163 const struct ieee80211_regdomain *regd;
1165 request_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx);
1167 flags = chan->orig_flags;
1169 reg_rule = freq_reg_info(wiphy, MHZ_TO_KHZ(chan->center_freq));
1170 if (IS_ERR(reg_rule)) {
1172 * We will disable all channels that do not match our
1173 * received regulatory rule unless the hint is coming
1174 * from a Country IE and the Country IE had no information
1175 * about a band. The IEEE 802.11 spec allows for an AP
1176 * to send only a subset of the regulatory rules allowed,
1177 * so an AP in the US that only supports 2.4 GHz may only send
1178 * a country IE with information for the 2.4 GHz band
1179 * while 5 GHz is still supported.
1181 if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE &&
1182 PTR_ERR(reg_rule) == -ERANGE)
1185 if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER &&
1186 request_wiphy && request_wiphy == wiphy &&
1187 request_wiphy->regulatory_flags & REGULATORY_STRICT_REG) {
1188 pr_debug("Disabling freq %d MHz for good\n",
1190 chan->orig_flags |= IEEE80211_CHAN_DISABLED;
1191 chan->flags = chan->orig_flags;
1193 pr_debug("Disabling freq %d MHz\n",
1195 chan->flags |= IEEE80211_CHAN_DISABLED;
1200 regd = reg_get_regdomain(wiphy);
1202 power_rule = ®_rule->power_rule;
1203 bw_flags = reg_rule_to_chan_bw_flags(regd, reg_rule, chan);
1205 if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER &&
1206 request_wiphy && request_wiphy == wiphy &&
1207 request_wiphy->regulatory_flags & REGULATORY_STRICT_REG) {
1209 * This guarantees the driver's requested regulatory domain
1210 * will always be used as a base for further regulatory
1213 chan->flags = chan->orig_flags =
1214 map_regdom_flags(reg_rule->flags) | bw_flags;
1215 chan->max_antenna_gain = chan->orig_mag =
1216 (int) MBI_TO_DBI(power_rule->max_antenna_gain);
1217 chan->max_reg_power = chan->max_power = chan->orig_mpwr =
1218 (int) MBM_TO_DBM(power_rule->max_eirp);
1220 if (chan->flags & IEEE80211_CHAN_RADAR) {
1221 chan->dfs_cac_ms = IEEE80211_DFS_MIN_CAC_TIME_MS;
1222 if (reg_rule->dfs_cac_ms)
1223 chan->dfs_cac_ms = reg_rule->dfs_cac_ms;
1229 chan->dfs_state = NL80211_DFS_USABLE;
1230 chan->dfs_state_entered = jiffies;
1232 chan->beacon_found = false;
1233 chan->flags = flags | bw_flags | map_regdom_flags(reg_rule->flags);
1234 chan->max_antenna_gain =
1235 min_t(int, chan->orig_mag,
1236 MBI_TO_DBI(power_rule->max_antenna_gain));
1237 chan->max_reg_power = (int) MBM_TO_DBM(power_rule->max_eirp);
1239 if (chan->flags & IEEE80211_CHAN_RADAR) {
1240 if (reg_rule->dfs_cac_ms)
1241 chan->dfs_cac_ms = reg_rule->dfs_cac_ms;
1243 chan->dfs_cac_ms = IEEE80211_DFS_MIN_CAC_TIME_MS;
1246 if (chan->orig_mpwr) {
1248 * Devices that use REGULATORY_COUNTRY_IE_FOLLOW_POWER
1249 * will always follow the passed country IE power settings.
1251 if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE &&
1252 wiphy->regulatory_flags & REGULATORY_COUNTRY_IE_FOLLOW_POWER)
1253 chan->max_power = chan->max_reg_power;
1255 chan->max_power = min(chan->orig_mpwr,
1256 chan->max_reg_power);
1258 chan->max_power = chan->max_reg_power;
1261 static void handle_band(struct wiphy *wiphy,
1262 enum nl80211_reg_initiator initiator,
1263 struct ieee80211_supported_band *sband)
1270 for (i = 0; i < sband->n_channels; i++)
1271 handle_channel(wiphy, initiator, &sband->channels[i]);
1274 static bool reg_request_cell_base(struct regulatory_request *request)
1276 if (request->initiator != NL80211_REGDOM_SET_BY_USER)
1278 return request->user_reg_hint_type == NL80211_USER_REG_HINT_CELL_BASE;
1281 bool reg_last_request_cell_base(void)
1283 return reg_request_cell_base(get_last_request());
1286 #ifdef CONFIG_CFG80211_REG_CELLULAR_HINTS
1287 /* Core specific check */
1288 static enum reg_request_treatment
1289 reg_ignore_cell_hint(struct regulatory_request *pending_request)
1291 struct regulatory_request *lr = get_last_request();
1293 if (!reg_num_devs_support_basehint)
1294 return REG_REQ_IGNORE;
1296 if (reg_request_cell_base(lr) &&
1297 !regdom_changes(pending_request->alpha2))
1298 return REG_REQ_ALREADY_SET;
1303 /* Device specific check */
1304 static bool reg_dev_ignore_cell_hint(struct wiphy *wiphy)
1306 return !(wiphy->features & NL80211_FEATURE_CELL_BASE_REG_HINTS);
1309 static enum reg_request_treatment
1310 reg_ignore_cell_hint(struct regulatory_request *pending_request)
1312 return REG_REQ_IGNORE;
1315 static bool reg_dev_ignore_cell_hint(struct wiphy *wiphy)
1321 static bool wiphy_strict_alpha2_regd(struct wiphy *wiphy)
1323 if (wiphy->regulatory_flags & REGULATORY_STRICT_REG &&
1324 !(wiphy->regulatory_flags & REGULATORY_CUSTOM_REG))
1329 static bool ignore_reg_update(struct wiphy *wiphy,
1330 enum nl80211_reg_initiator initiator)
1332 struct regulatory_request *lr = get_last_request();
1334 if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED)
1338 pr_debug("Ignoring regulatory request set by %s since last_request is not set\n",
1339 reg_initiator_name(initiator));
1343 if (initiator == NL80211_REGDOM_SET_BY_CORE &&
1344 wiphy->regulatory_flags & REGULATORY_CUSTOM_REG) {
1345 pr_debug("Ignoring regulatory request set by %s since the driver uses its own custom regulatory domain\n",
1346 reg_initiator_name(initiator));
1351 * wiphy->regd will be set once the device has its own
1352 * desired regulatory domain set
1354 if (wiphy_strict_alpha2_regd(wiphy) && !wiphy->regd &&
1355 initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE &&
1356 !is_world_regdom(lr->alpha2)) {
1357 pr_debug("Ignoring regulatory request set by %s since the driver requires its own regulatory domain to be set first\n",
1358 reg_initiator_name(initiator));
1362 if (reg_request_cell_base(lr))
1363 return reg_dev_ignore_cell_hint(wiphy);
1368 static bool reg_is_world_roaming(struct wiphy *wiphy)
1370 const struct ieee80211_regdomain *cr = get_cfg80211_regdom();
1371 const struct ieee80211_regdomain *wr = get_wiphy_regdom(wiphy);
1372 struct regulatory_request *lr = get_last_request();
1374 if (is_world_regdom(cr->alpha2) || (wr && is_world_regdom(wr->alpha2)))
1377 if (lr && lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE &&
1378 wiphy->regulatory_flags & REGULATORY_CUSTOM_REG)
1384 static void handle_reg_beacon(struct wiphy *wiphy, unsigned int chan_idx,
1385 struct reg_beacon *reg_beacon)
1387 struct ieee80211_supported_band *sband;
1388 struct ieee80211_channel *chan;
1389 bool channel_changed = false;
1390 struct ieee80211_channel chan_before;
1392 sband = wiphy->bands[reg_beacon->chan.band];
1393 chan = &sband->channels[chan_idx];
1395 if (likely(chan->center_freq != reg_beacon->chan.center_freq))
1398 if (chan->beacon_found)
1401 chan->beacon_found = true;
1403 if (!reg_is_world_roaming(wiphy))
1406 if (wiphy->regulatory_flags & REGULATORY_DISABLE_BEACON_HINTS)
1409 chan_before.center_freq = chan->center_freq;
1410 chan_before.flags = chan->flags;
1412 if (chan->flags & IEEE80211_CHAN_NO_IR) {
1413 chan->flags &= ~IEEE80211_CHAN_NO_IR;
1414 channel_changed = true;
1417 if (channel_changed)
1418 nl80211_send_beacon_hint_event(wiphy, &chan_before, chan);
1422 * Called when a scan on a wiphy finds a beacon on
1425 static void wiphy_update_new_beacon(struct wiphy *wiphy,
1426 struct reg_beacon *reg_beacon)
1429 struct ieee80211_supported_band *sband;
1431 if (!wiphy->bands[reg_beacon->chan.band])
1434 sband = wiphy->bands[reg_beacon->chan.band];
1436 for (i = 0; i < sband->n_channels; i++)
1437 handle_reg_beacon(wiphy, i, reg_beacon);
1441 * Called upon reg changes or a new wiphy is added
1443 static void wiphy_update_beacon_reg(struct wiphy *wiphy)
1446 struct ieee80211_supported_band *sband;
1447 struct reg_beacon *reg_beacon;
1449 list_for_each_entry(reg_beacon, ®_beacon_list, list) {
1450 if (!wiphy->bands[reg_beacon->chan.band])
1452 sband = wiphy->bands[reg_beacon->chan.band];
1453 for (i = 0; i < sband->n_channels; i++)
1454 handle_reg_beacon(wiphy, i, reg_beacon);
1458 /* Reap the advantages of previously found beacons */
1459 static void reg_process_beacons(struct wiphy *wiphy)
1462 * Means we are just firing up cfg80211, so no beacons would
1463 * have been processed yet.
1467 wiphy_update_beacon_reg(wiphy);
1470 static bool is_ht40_allowed(struct ieee80211_channel *chan)
1474 if (chan->flags & IEEE80211_CHAN_DISABLED)
1476 /* This would happen when regulatory rules disallow HT40 completely */
1477 if ((chan->flags & IEEE80211_CHAN_NO_HT40) == IEEE80211_CHAN_NO_HT40)
1482 static void reg_process_ht_flags_channel(struct wiphy *wiphy,
1483 struct ieee80211_channel *channel)
1485 struct ieee80211_supported_band *sband = wiphy->bands[channel->band];
1486 struct ieee80211_channel *channel_before = NULL, *channel_after = NULL;
1487 const struct ieee80211_regdomain *regd;
1491 if (!is_ht40_allowed(channel)) {
1492 channel->flags |= IEEE80211_CHAN_NO_HT40;
1497 * We need to ensure the extension channels exist to
1498 * be able to use HT40- or HT40+, this finds them (or not)
1500 for (i = 0; i < sband->n_channels; i++) {
1501 struct ieee80211_channel *c = &sband->channels[i];
1503 if (c->center_freq == (channel->center_freq - 20))
1505 if (c->center_freq == (channel->center_freq + 20))
1510 regd = get_wiphy_regdom(wiphy);
1512 const struct ieee80211_reg_rule *reg_rule =
1513 freq_reg_info_regd(MHZ_TO_KHZ(channel->center_freq),
1514 regd, MHZ_TO_KHZ(20));
1516 if (!IS_ERR(reg_rule))
1517 flags = reg_rule->flags;
1521 * Please note that this assumes target bandwidth is 20 MHz,
1522 * if that ever changes we also need to change the below logic
1523 * to include that as well.
1525 if (!is_ht40_allowed(channel_before) ||
1526 flags & NL80211_RRF_NO_HT40MINUS)
1527 channel->flags |= IEEE80211_CHAN_NO_HT40MINUS;
1529 channel->flags &= ~IEEE80211_CHAN_NO_HT40MINUS;
1531 if (!is_ht40_allowed(channel_after) ||
1532 flags & NL80211_RRF_NO_HT40PLUS)
1533 channel->flags |= IEEE80211_CHAN_NO_HT40PLUS;
1535 channel->flags &= ~IEEE80211_CHAN_NO_HT40PLUS;
1538 static void reg_process_ht_flags_band(struct wiphy *wiphy,
1539 struct ieee80211_supported_band *sband)
1546 for (i = 0; i < sband->n_channels; i++)
1547 reg_process_ht_flags_channel(wiphy, &sband->channels[i]);
1550 static void reg_process_ht_flags(struct wiphy *wiphy)
1552 enum nl80211_band band;
1557 for (band = 0; band < NUM_NL80211_BANDS; band++)
1558 reg_process_ht_flags_band(wiphy, wiphy->bands[band]);
1561 static void reg_call_notifier(struct wiphy *wiphy,
1562 struct regulatory_request *request)
1564 if (wiphy->reg_notifier)
1565 wiphy->reg_notifier(wiphy, request);
1568 static bool reg_wdev_chan_valid(struct wiphy *wiphy, struct wireless_dev *wdev)
1570 struct cfg80211_chan_def chandef;
1571 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
1572 enum nl80211_iftype iftype;
1575 iftype = wdev->iftype;
1577 /* make sure the interface is active */
1578 if (!wdev->netdev || !netif_running(wdev->netdev))
1579 goto wdev_inactive_unlock;
1582 case NL80211_IFTYPE_AP:
1583 case NL80211_IFTYPE_P2P_GO:
1584 if (!wdev->beacon_interval)
1585 goto wdev_inactive_unlock;
1586 chandef = wdev->chandef;
1588 case NL80211_IFTYPE_ADHOC:
1589 if (!wdev->ssid_len)
1590 goto wdev_inactive_unlock;
1591 chandef = wdev->chandef;
1593 case NL80211_IFTYPE_STATION:
1594 case NL80211_IFTYPE_P2P_CLIENT:
1595 if (!wdev->current_bss ||
1596 !wdev->current_bss->pub.channel)
1597 goto wdev_inactive_unlock;
1599 if (!rdev->ops->get_channel ||
1600 rdev_get_channel(rdev, wdev, &chandef))
1601 cfg80211_chandef_create(&chandef,
1602 wdev->current_bss->pub.channel,
1603 NL80211_CHAN_NO_HT);
1605 case NL80211_IFTYPE_MONITOR:
1606 case NL80211_IFTYPE_AP_VLAN:
1607 case NL80211_IFTYPE_P2P_DEVICE:
1608 /* no enforcement required */
1611 /* others not implemented for now */
1619 case NL80211_IFTYPE_AP:
1620 case NL80211_IFTYPE_P2P_GO:
1621 case NL80211_IFTYPE_ADHOC:
1622 return cfg80211_reg_can_beacon_relax(wiphy, &chandef, iftype);
1623 case NL80211_IFTYPE_STATION:
1624 case NL80211_IFTYPE_P2P_CLIENT:
1625 return cfg80211_chandef_usable(wiphy, &chandef,
1626 IEEE80211_CHAN_DISABLED);
1633 wdev_inactive_unlock:
1638 static void reg_leave_invalid_chans(struct wiphy *wiphy)
1640 struct wireless_dev *wdev;
1641 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
1645 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list)
1646 if (!reg_wdev_chan_valid(wiphy, wdev))
1647 cfg80211_leave(rdev, wdev);
1650 static void reg_check_chans_work(struct work_struct *work)
1652 struct cfg80211_registered_device *rdev;
1654 pr_debug("Verifying active interfaces after reg change\n");
1657 list_for_each_entry(rdev, &cfg80211_rdev_list, list)
1658 if (!(rdev->wiphy.regulatory_flags &
1659 REGULATORY_IGNORE_STALE_KICKOFF))
1660 reg_leave_invalid_chans(&rdev->wiphy);
1665 static void reg_check_channels(void)
1668 * Give usermode a chance to do something nicer (move to another
1669 * channel, orderly disconnection), before forcing a disconnection.
1671 mod_delayed_work(system_power_efficient_wq,
1673 msecs_to_jiffies(REG_ENFORCE_GRACE_MS));
1676 static void wiphy_update_regulatory(struct wiphy *wiphy,
1677 enum nl80211_reg_initiator initiator)
1679 enum nl80211_band band;
1680 struct regulatory_request *lr = get_last_request();
1682 if (ignore_reg_update(wiphy, initiator)) {
1684 * Regulatory updates set by CORE are ignored for custom
1685 * regulatory cards. Let us notify the changes to the driver,
1686 * as some drivers used this to restore its orig_* reg domain.
1688 if (initiator == NL80211_REGDOM_SET_BY_CORE &&
1689 wiphy->regulatory_flags & REGULATORY_CUSTOM_REG)
1690 reg_call_notifier(wiphy, lr);
1694 lr->dfs_region = get_cfg80211_regdom()->dfs_region;
1696 for (band = 0; band < NUM_NL80211_BANDS; band++)
1697 handle_band(wiphy, initiator, wiphy->bands[band]);
1699 reg_process_beacons(wiphy);
1700 reg_process_ht_flags(wiphy);
1701 reg_call_notifier(wiphy, lr);
1704 static void update_all_wiphy_regulatory(enum nl80211_reg_initiator initiator)
1706 struct cfg80211_registered_device *rdev;
1707 struct wiphy *wiphy;
1711 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
1712 wiphy = &rdev->wiphy;
1713 wiphy_update_regulatory(wiphy, initiator);
1716 reg_check_channels();
1719 static void handle_channel_custom(struct wiphy *wiphy,
1720 struct ieee80211_channel *chan,
1721 const struct ieee80211_regdomain *regd)
1724 const struct ieee80211_reg_rule *reg_rule = NULL;
1725 const struct ieee80211_power_rule *power_rule = NULL;
1728 for (bw = MHZ_TO_KHZ(20); bw >= MHZ_TO_KHZ(5); bw = bw / 2) {
1729 reg_rule = freq_reg_info_regd(MHZ_TO_KHZ(chan->center_freq),
1731 if (!IS_ERR(reg_rule))
1735 if (IS_ERR(reg_rule)) {
1736 pr_debug("Disabling freq %d MHz as custom regd has no rule that fits it\n",
1738 if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) {
1739 chan->flags |= IEEE80211_CHAN_DISABLED;
1741 chan->orig_flags |= IEEE80211_CHAN_DISABLED;
1742 chan->flags = chan->orig_flags;
1747 power_rule = ®_rule->power_rule;
1748 bw_flags = reg_rule_to_chan_bw_flags(regd, reg_rule, chan);
1750 chan->dfs_state_entered = jiffies;
1751 chan->dfs_state = NL80211_DFS_USABLE;
1753 chan->beacon_found = false;
1755 if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED)
1756 chan->flags = chan->orig_flags | bw_flags |
1757 map_regdom_flags(reg_rule->flags);
1759 chan->flags |= map_regdom_flags(reg_rule->flags) | bw_flags;
1761 chan->max_antenna_gain = (int) MBI_TO_DBI(power_rule->max_antenna_gain);
1762 chan->max_reg_power = chan->max_power =
1763 (int) MBM_TO_DBM(power_rule->max_eirp);
1765 if (chan->flags & IEEE80211_CHAN_RADAR) {
1766 if (reg_rule->dfs_cac_ms)
1767 chan->dfs_cac_ms = reg_rule->dfs_cac_ms;
1769 chan->dfs_cac_ms = IEEE80211_DFS_MIN_CAC_TIME_MS;
1772 chan->max_power = chan->max_reg_power;
1775 static void handle_band_custom(struct wiphy *wiphy,
1776 struct ieee80211_supported_band *sband,
1777 const struct ieee80211_regdomain *regd)
1784 for (i = 0; i < sband->n_channels; i++)
1785 handle_channel_custom(wiphy, &sband->channels[i], regd);
1788 /* Used by drivers prior to wiphy registration */
1789 void wiphy_apply_custom_regulatory(struct wiphy *wiphy,
1790 const struct ieee80211_regdomain *regd)
1792 enum nl80211_band band;
1793 unsigned int bands_set = 0;
1795 WARN(!(wiphy->regulatory_flags & REGULATORY_CUSTOM_REG),
1796 "wiphy should have REGULATORY_CUSTOM_REG\n");
1797 wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG;
1799 for (band = 0; band < NUM_NL80211_BANDS; band++) {
1800 if (!wiphy->bands[band])
1802 handle_band_custom(wiphy, wiphy->bands[band], regd);
1807 * no point in calling this if it won't have any effect
1808 * on your device's supported bands.
1810 WARN_ON(!bands_set);
1812 EXPORT_SYMBOL(wiphy_apply_custom_regulatory);
1814 static void reg_set_request_processed(void)
1816 bool need_more_processing = false;
1817 struct regulatory_request *lr = get_last_request();
1819 lr->processed = true;
1821 spin_lock(®_requests_lock);
1822 if (!list_empty(®_requests_list))
1823 need_more_processing = true;
1824 spin_unlock(®_requests_lock);
1826 cancel_crda_timeout();
1828 if (need_more_processing)
1829 schedule_work(®_work);
1833 * reg_process_hint_core - process core regulatory requests
1834 * @pending_request: a pending core regulatory request
1836 * The wireless subsystem can use this function to process
1837 * a regulatory request issued by the regulatory core.
1839 static enum reg_request_treatment
1840 reg_process_hint_core(struct regulatory_request *core_request)
1842 if (reg_query_database(core_request)) {
1843 core_request->intersect = false;
1844 core_request->processed = false;
1845 reg_update_last_request(core_request);
1849 return REG_REQ_IGNORE;
1852 static enum reg_request_treatment
1853 __reg_process_hint_user(struct regulatory_request *user_request)
1855 struct regulatory_request *lr = get_last_request();
1857 if (reg_request_cell_base(user_request))
1858 return reg_ignore_cell_hint(user_request);
1860 if (reg_request_cell_base(lr))
1861 return REG_REQ_IGNORE;
1863 if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE)
1864 return REG_REQ_INTERSECT;
1866 * If the user knows better the user should set the regdom
1867 * to their country before the IE is picked up
1869 if (lr->initiator == NL80211_REGDOM_SET_BY_USER &&
1871 return REG_REQ_IGNORE;
1873 * Process user requests only after previous user/driver/core
1874 * requests have been processed
1876 if ((lr->initiator == NL80211_REGDOM_SET_BY_CORE ||
1877 lr->initiator == NL80211_REGDOM_SET_BY_DRIVER ||
1878 lr->initiator == NL80211_REGDOM_SET_BY_USER) &&
1879 regdom_changes(lr->alpha2))
1880 return REG_REQ_IGNORE;
1882 if (!regdom_changes(user_request->alpha2))
1883 return REG_REQ_ALREADY_SET;
1889 * reg_process_hint_user - process user regulatory requests
1890 * @user_request: a pending user regulatory request
1892 * The wireless subsystem can use this function to process
1893 * a regulatory request initiated by userspace.
1895 static enum reg_request_treatment
1896 reg_process_hint_user(struct regulatory_request *user_request)
1898 enum reg_request_treatment treatment;
1900 treatment = __reg_process_hint_user(user_request);
1901 if (treatment == REG_REQ_IGNORE ||
1902 treatment == REG_REQ_ALREADY_SET)
1903 return REG_REQ_IGNORE;
1905 user_request->intersect = treatment == REG_REQ_INTERSECT;
1906 user_request->processed = false;
1908 if (reg_query_database(user_request)) {
1909 reg_update_last_request(user_request);
1910 user_alpha2[0] = user_request->alpha2[0];
1911 user_alpha2[1] = user_request->alpha2[1];
1915 return REG_REQ_IGNORE;
1918 static enum reg_request_treatment
1919 __reg_process_hint_driver(struct regulatory_request *driver_request)
1921 struct regulatory_request *lr = get_last_request();
1923 if (lr->initiator == NL80211_REGDOM_SET_BY_CORE) {
1924 if (regdom_changes(driver_request->alpha2))
1926 return REG_REQ_ALREADY_SET;
1930 * This would happen if you unplug and plug your card
1931 * back in or if you add a new device for which the previously
1932 * loaded card also agrees on the regulatory domain.
1934 if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER &&
1935 !regdom_changes(driver_request->alpha2))
1936 return REG_REQ_ALREADY_SET;
1938 return REG_REQ_INTERSECT;
1942 * reg_process_hint_driver - process driver regulatory requests
1943 * @driver_request: a pending driver regulatory request
1945 * The wireless subsystem can use this function to process
1946 * a regulatory request issued by an 802.11 driver.
1948 * Returns one of the different reg request treatment values.
1950 static enum reg_request_treatment
1951 reg_process_hint_driver(struct wiphy *wiphy,
1952 struct regulatory_request *driver_request)
1954 const struct ieee80211_regdomain *regd, *tmp;
1955 enum reg_request_treatment treatment;
1957 treatment = __reg_process_hint_driver(driver_request);
1959 switch (treatment) {
1962 case REG_REQ_IGNORE:
1963 return REG_REQ_IGNORE;
1964 case REG_REQ_INTERSECT:
1965 case REG_REQ_ALREADY_SET:
1966 regd = reg_copy_regd(get_cfg80211_regdom());
1968 return REG_REQ_IGNORE;
1970 tmp = get_wiphy_regdom(wiphy);
1971 rcu_assign_pointer(wiphy->regd, regd);
1972 rcu_free_regdom(tmp);
1976 driver_request->intersect = treatment == REG_REQ_INTERSECT;
1977 driver_request->processed = false;
1980 * Since CRDA will not be called in this case as we already
1981 * have applied the requested regulatory domain before we just
1982 * inform userspace we have processed the request
1984 if (treatment == REG_REQ_ALREADY_SET) {
1985 nl80211_send_reg_change_event(driver_request);
1986 reg_update_last_request(driver_request);
1987 reg_set_request_processed();
1988 return REG_REQ_ALREADY_SET;
1991 if (reg_query_database(driver_request)) {
1992 reg_update_last_request(driver_request);
1996 return REG_REQ_IGNORE;
1999 static enum reg_request_treatment
2000 __reg_process_hint_country_ie(struct wiphy *wiphy,
2001 struct regulatory_request *country_ie_request)
2003 struct wiphy *last_wiphy = NULL;
2004 struct regulatory_request *lr = get_last_request();
2006 if (reg_request_cell_base(lr)) {
2007 /* Trust a Cell base station over the AP's country IE */
2008 if (regdom_changes(country_ie_request->alpha2))
2009 return REG_REQ_IGNORE;
2010 return REG_REQ_ALREADY_SET;
2012 if (wiphy->regulatory_flags & REGULATORY_COUNTRY_IE_IGNORE)
2013 return REG_REQ_IGNORE;
2016 if (unlikely(!is_an_alpha2(country_ie_request->alpha2)))
2019 if (lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE)
2022 last_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx);
2024 if (last_wiphy != wiphy) {
2026 * Two cards with two APs claiming different
2027 * Country IE alpha2s. We could
2028 * intersect them, but that seems unlikely
2029 * to be correct. Reject second one for now.
2031 if (regdom_changes(country_ie_request->alpha2))
2032 return REG_REQ_IGNORE;
2033 return REG_REQ_ALREADY_SET;
2036 if (regdom_changes(country_ie_request->alpha2))
2038 return REG_REQ_ALREADY_SET;
2042 * reg_process_hint_country_ie - process regulatory requests from country IEs
2043 * @country_ie_request: a regulatory request from a country IE
2045 * The wireless subsystem can use this function to process
2046 * a regulatory request issued by a country Information Element.
2048 * Returns one of the different reg request treatment values.
2050 static enum reg_request_treatment
2051 reg_process_hint_country_ie(struct wiphy *wiphy,
2052 struct regulatory_request *country_ie_request)
2054 enum reg_request_treatment treatment;
2056 treatment = __reg_process_hint_country_ie(wiphy, country_ie_request);
2058 switch (treatment) {
2061 case REG_REQ_IGNORE:
2062 return REG_REQ_IGNORE;
2063 case REG_REQ_ALREADY_SET:
2064 reg_free_request(country_ie_request);
2065 return REG_REQ_ALREADY_SET;
2066 case REG_REQ_INTERSECT:
2068 * This doesn't happen yet, not sure we
2069 * ever want to support it for this case.
2071 WARN_ONCE(1, "Unexpected intersection for country IEs");
2072 return REG_REQ_IGNORE;
2075 country_ie_request->intersect = false;
2076 country_ie_request->processed = false;
2078 if (reg_query_database(country_ie_request)) {
2079 reg_update_last_request(country_ie_request);
2083 return REG_REQ_IGNORE;
2086 bool reg_dfs_domain_same(struct wiphy *wiphy1, struct wiphy *wiphy2)
2088 const struct ieee80211_regdomain *wiphy1_regd = NULL;
2089 const struct ieee80211_regdomain *wiphy2_regd = NULL;
2090 const struct ieee80211_regdomain *cfg80211_regd = NULL;
2091 bool dfs_domain_same;
2095 cfg80211_regd = rcu_dereference(cfg80211_regdomain);
2096 wiphy1_regd = rcu_dereference(wiphy1->regd);
2098 wiphy1_regd = cfg80211_regd;
2100 wiphy2_regd = rcu_dereference(wiphy2->regd);
2102 wiphy2_regd = cfg80211_regd;
2104 dfs_domain_same = wiphy1_regd->dfs_region == wiphy2_regd->dfs_region;
2108 return dfs_domain_same;
2111 static void reg_copy_dfs_chan_state(struct ieee80211_channel *dst_chan,
2112 struct ieee80211_channel *src_chan)
2114 if (!(dst_chan->flags & IEEE80211_CHAN_RADAR) ||
2115 !(src_chan->flags & IEEE80211_CHAN_RADAR))
2118 if (dst_chan->flags & IEEE80211_CHAN_DISABLED ||
2119 src_chan->flags & IEEE80211_CHAN_DISABLED)
2122 if (src_chan->center_freq == dst_chan->center_freq &&
2123 dst_chan->dfs_state == NL80211_DFS_USABLE) {
2124 dst_chan->dfs_state = src_chan->dfs_state;
2125 dst_chan->dfs_state_entered = src_chan->dfs_state_entered;
2129 static void wiphy_share_dfs_chan_state(struct wiphy *dst_wiphy,
2130 struct wiphy *src_wiphy)
2132 struct ieee80211_supported_band *src_sband, *dst_sband;
2133 struct ieee80211_channel *src_chan, *dst_chan;
2136 if (!reg_dfs_domain_same(dst_wiphy, src_wiphy))
2139 for (band = 0; band < NUM_NL80211_BANDS; band++) {
2140 dst_sband = dst_wiphy->bands[band];
2141 src_sband = src_wiphy->bands[band];
2142 if (!dst_sband || !src_sband)
2145 for (i = 0; i < dst_sband->n_channels; i++) {
2146 dst_chan = &dst_sband->channels[i];
2147 for (j = 0; j < src_sband->n_channels; j++) {
2148 src_chan = &src_sband->channels[j];
2149 reg_copy_dfs_chan_state(dst_chan, src_chan);
2155 static void wiphy_all_share_dfs_chan_state(struct wiphy *wiphy)
2157 struct cfg80211_registered_device *rdev;
2161 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
2162 if (wiphy == &rdev->wiphy)
2164 wiphy_share_dfs_chan_state(wiphy, &rdev->wiphy);
2168 /* This processes *all* regulatory hints */
2169 static void reg_process_hint(struct regulatory_request *reg_request)
2171 struct wiphy *wiphy = NULL;
2172 enum reg_request_treatment treatment;
2174 if (reg_request->wiphy_idx != WIPHY_IDX_INVALID)
2175 wiphy = wiphy_idx_to_wiphy(reg_request->wiphy_idx);
2177 switch (reg_request->initiator) {
2178 case NL80211_REGDOM_SET_BY_CORE:
2179 treatment = reg_process_hint_core(reg_request);
2181 case NL80211_REGDOM_SET_BY_USER:
2182 treatment = reg_process_hint_user(reg_request);
2184 case NL80211_REGDOM_SET_BY_DRIVER:
2187 treatment = reg_process_hint_driver(wiphy, reg_request);
2189 case NL80211_REGDOM_SET_BY_COUNTRY_IE:
2192 treatment = reg_process_hint_country_ie(wiphy, reg_request);
2195 WARN(1, "invalid initiator %d\n", reg_request->initiator);
2199 if (treatment == REG_REQ_IGNORE)
2202 WARN(treatment != REG_REQ_OK && treatment != REG_REQ_ALREADY_SET,
2203 "unexpected treatment value %d\n", treatment);
2205 /* This is required so that the orig_* parameters are saved.
2206 * NOTE: treatment must be set for any case that reaches here!
2208 if (treatment == REG_REQ_ALREADY_SET && wiphy &&
2209 wiphy->regulatory_flags & REGULATORY_STRICT_REG) {
2210 wiphy_update_regulatory(wiphy, reg_request->initiator);
2211 wiphy_all_share_dfs_chan_state(wiphy);
2212 reg_check_channels();
2218 reg_free_request(reg_request);
2221 static bool reg_only_self_managed_wiphys(void)
2223 struct cfg80211_registered_device *rdev;
2224 struct wiphy *wiphy;
2225 bool self_managed_found = false;
2229 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
2230 wiphy = &rdev->wiphy;
2231 if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED)
2232 self_managed_found = true;
2237 /* make sure at least one self-managed wiphy exists */
2238 return self_managed_found;
2242 * Processes regulatory hints, this is all the NL80211_REGDOM_SET_BY_*
2243 * Regulatory hints come on a first come first serve basis and we
2244 * must process each one atomically.
2246 static void reg_process_pending_hints(void)
2248 struct regulatory_request *reg_request, *lr;
2250 lr = get_last_request();
2252 /* When last_request->processed becomes true this will be rescheduled */
2253 if (lr && !lr->processed) {
2254 reg_process_hint(lr);
2258 spin_lock(®_requests_lock);
2260 if (list_empty(®_requests_list)) {
2261 spin_unlock(®_requests_lock);
2265 reg_request = list_first_entry(®_requests_list,
2266 struct regulatory_request,
2268 list_del_init(®_request->list);
2270 spin_unlock(®_requests_lock);
2272 if (reg_only_self_managed_wiphys()) {
2273 reg_free_request(reg_request);
2277 reg_process_hint(reg_request);
2279 lr = get_last_request();
2281 spin_lock(®_requests_lock);
2282 if (!list_empty(®_requests_list) && lr && lr->processed)
2283 schedule_work(®_work);
2284 spin_unlock(®_requests_lock);
2287 /* Processes beacon hints -- this has nothing to do with country IEs */
2288 static void reg_process_pending_beacon_hints(void)
2290 struct cfg80211_registered_device *rdev;
2291 struct reg_beacon *pending_beacon, *tmp;
2293 /* This goes through the _pending_ beacon list */
2294 spin_lock_bh(®_pending_beacons_lock);
2296 list_for_each_entry_safe(pending_beacon, tmp,
2297 ®_pending_beacons, list) {
2298 list_del_init(&pending_beacon->list);
2300 /* Applies the beacon hint to current wiphys */
2301 list_for_each_entry(rdev, &cfg80211_rdev_list, list)
2302 wiphy_update_new_beacon(&rdev->wiphy, pending_beacon);
2304 /* Remembers the beacon hint for new wiphys or reg changes */
2305 list_add_tail(&pending_beacon->list, ®_beacon_list);
2308 spin_unlock_bh(®_pending_beacons_lock);
2311 static void reg_process_self_managed_hints(void)
2313 struct cfg80211_registered_device *rdev;
2314 struct wiphy *wiphy;
2315 const struct ieee80211_regdomain *tmp;
2316 const struct ieee80211_regdomain *regd;
2317 enum nl80211_band band;
2318 struct regulatory_request request = {};
2320 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
2321 wiphy = &rdev->wiphy;
2323 spin_lock(®_requests_lock);
2324 regd = rdev->requested_regd;
2325 rdev->requested_regd = NULL;
2326 spin_unlock(®_requests_lock);
2331 tmp = get_wiphy_regdom(wiphy);
2332 rcu_assign_pointer(wiphy->regd, regd);
2333 rcu_free_regdom(tmp);
2335 for (band = 0; band < NUM_NL80211_BANDS; band++)
2336 handle_band_custom(wiphy, wiphy->bands[band], regd);
2338 reg_process_ht_flags(wiphy);
2340 request.wiphy_idx = get_wiphy_idx(wiphy);
2341 request.alpha2[0] = regd->alpha2[0];
2342 request.alpha2[1] = regd->alpha2[1];
2343 request.initiator = NL80211_REGDOM_SET_BY_DRIVER;
2345 nl80211_send_wiphy_reg_change_event(&request);
2348 reg_check_channels();
2351 static void reg_todo(struct work_struct *work)
2354 reg_process_pending_hints();
2355 reg_process_pending_beacon_hints();
2356 reg_process_self_managed_hints();
2360 static void queue_regulatory_request(struct regulatory_request *request)
2362 request->alpha2[0] = toupper(request->alpha2[0]);
2363 request->alpha2[1] = toupper(request->alpha2[1]);
2365 spin_lock(®_requests_lock);
2366 list_add_tail(&request->list, ®_requests_list);
2367 spin_unlock(®_requests_lock);
2369 schedule_work(®_work);
2373 * Core regulatory hint -- happens during cfg80211_init()
2374 * and when we restore regulatory settings.
2376 static int regulatory_hint_core(const char *alpha2)
2378 struct regulatory_request *request;
2380 request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL);
2384 request->alpha2[0] = alpha2[0];
2385 request->alpha2[1] = alpha2[1];
2386 request->initiator = NL80211_REGDOM_SET_BY_CORE;
2388 queue_regulatory_request(request);
2394 int regulatory_hint_user(const char *alpha2,
2395 enum nl80211_user_reg_hint_type user_reg_hint_type)
2397 struct regulatory_request *request;
2399 if (WARN_ON(!alpha2))
2402 request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL);
2406 request->wiphy_idx = WIPHY_IDX_INVALID;
2407 request->alpha2[0] = alpha2[0];
2408 request->alpha2[1] = alpha2[1];
2409 request->initiator = NL80211_REGDOM_SET_BY_USER;
2410 request->user_reg_hint_type = user_reg_hint_type;
2412 /* Allow calling CRDA again */
2413 reset_crda_timeouts();
2415 queue_regulatory_request(request);
2420 int regulatory_hint_indoor(bool is_indoor, u32 portid)
2422 spin_lock(®_indoor_lock);
2424 /* It is possible that more than one user space process is trying to
2425 * configure the indoor setting. To handle such cases, clear the indoor
2426 * setting in case that some process does not think that the device
2427 * is operating in an indoor environment. In addition, if a user space
2428 * process indicates that it is controlling the indoor setting, save its
2429 * portid, i.e., make it the owner.
2431 reg_is_indoor = is_indoor;
2432 if (reg_is_indoor) {
2433 if (!reg_is_indoor_portid)
2434 reg_is_indoor_portid = portid;
2436 reg_is_indoor_portid = 0;
2439 spin_unlock(®_indoor_lock);
2442 reg_check_channels();
2447 void regulatory_netlink_notify(u32 portid)
2449 spin_lock(®_indoor_lock);
2451 if (reg_is_indoor_portid != portid) {
2452 spin_unlock(®_indoor_lock);
2456 reg_is_indoor = false;
2457 reg_is_indoor_portid = 0;
2459 spin_unlock(®_indoor_lock);
2461 reg_check_channels();
2465 int regulatory_hint(struct wiphy *wiphy, const char *alpha2)
2467 struct regulatory_request *request;
2469 if (WARN_ON(!alpha2 || !wiphy))
2472 wiphy->regulatory_flags &= ~REGULATORY_CUSTOM_REG;
2474 request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL);
2478 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_DRIVER;
2484 /* Allow calling CRDA again */
2485 reset_crda_timeouts();
2487 queue_regulatory_request(request);
2491 EXPORT_SYMBOL(regulatory_hint);
2493 void regulatory_hint_country_ie(struct wiphy *wiphy, enum nl80211_band band,
2494 const u8 *country_ie, u8 country_ie_len)
2497 enum environment_cap env = ENVIRON_ANY;
2498 struct regulatory_request *request = NULL, *lr;
2500 /* IE len must be evenly divisible by 2 */
2501 if (country_ie_len & 0x01)
2504 if (country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
2507 request = kzalloc(sizeof(*request), GFP_KERNEL);
2511 alpha2[0] = country_ie[0];
2512 alpha2[1] = country_ie[1];
2514 if (country_ie[2] == 'I')
2515 env = ENVIRON_INDOOR;
2516 else if (country_ie[2] == 'O')
2517 env = ENVIRON_OUTDOOR;
2520 lr = get_last_request();
2526 * We will run this only upon a successful connection on cfg80211.
2527 * We leave conflict resolution to the workqueue, where can hold
2530 if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE &&
2531 lr->wiphy_idx != WIPHY_IDX_INVALID)
2534 request->wiphy_idx = get_wiphy_idx(wiphy);
2535 request->alpha2[0] = alpha2[0];
2536 request->alpha2[1] = alpha2[1];
2537 request->initiator = NL80211_REGDOM_SET_BY_COUNTRY_IE;
2538 request->country_ie_env = env;
2540 /* Allow calling CRDA again */
2541 reset_crda_timeouts();
2543 queue_regulatory_request(request);
2550 static void restore_alpha2(char *alpha2, bool reset_user)
2552 /* indicates there is no alpha2 to consider for restoration */
2556 /* The user setting has precedence over the module parameter */
2557 if (is_user_regdom_saved()) {
2558 /* Unless we're asked to ignore it and reset it */
2560 pr_debug("Restoring regulatory settings including user preference\n");
2561 user_alpha2[0] = '9';
2562 user_alpha2[1] = '7';
2565 * If we're ignoring user settings, we still need to
2566 * check the module parameter to ensure we put things
2567 * back as they were for a full restore.
2569 if (!is_world_regdom(ieee80211_regdom)) {
2570 pr_debug("Keeping preference on module parameter ieee80211_regdom: %c%c\n",
2571 ieee80211_regdom[0], ieee80211_regdom[1]);
2572 alpha2[0] = ieee80211_regdom[0];
2573 alpha2[1] = ieee80211_regdom[1];
2576 pr_debug("Restoring regulatory settings while preserving user preference for: %c%c\n",
2577 user_alpha2[0], user_alpha2[1]);
2578 alpha2[0] = user_alpha2[0];
2579 alpha2[1] = user_alpha2[1];
2581 } else if (!is_world_regdom(ieee80211_regdom)) {
2582 pr_debug("Keeping preference on module parameter ieee80211_regdom: %c%c\n",
2583 ieee80211_regdom[0], ieee80211_regdom[1]);
2584 alpha2[0] = ieee80211_regdom[0];
2585 alpha2[1] = ieee80211_regdom[1];
2587 pr_debug("Restoring regulatory settings\n");
2590 static void restore_custom_reg_settings(struct wiphy *wiphy)
2592 struct ieee80211_supported_band *sband;
2593 enum nl80211_band band;
2594 struct ieee80211_channel *chan;
2597 for (band = 0; band < NUM_NL80211_BANDS; band++) {
2598 sband = wiphy->bands[band];
2601 for (i = 0; i < sband->n_channels; i++) {
2602 chan = &sband->channels[i];
2603 chan->flags = chan->orig_flags;
2604 chan->max_antenna_gain = chan->orig_mag;
2605 chan->max_power = chan->orig_mpwr;
2606 chan->beacon_found = false;
2612 * Restoring regulatory settings involves ingoring any
2613 * possibly stale country IE information and user regulatory
2614 * settings if so desired, this includes any beacon hints
2615 * learned as we could have traveled outside to another country
2616 * after disconnection. To restore regulatory settings we do
2617 * exactly what we did at bootup:
2619 * - send a core regulatory hint
2620 * - send a user regulatory hint if applicable
2622 * Device drivers that send a regulatory hint for a specific country
2623 * keep their own regulatory domain on wiphy->regd so that does does
2624 * not need to be remembered.
2626 static void restore_regulatory_settings(bool reset_user)
2629 char world_alpha2[2];
2630 struct reg_beacon *reg_beacon, *btmp;
2631 LIST_HEAD(tmp_reg_req_list);
2632 struct cfg80211_registered_device *rdev;
2637 * Clear the indoor setting in case that it is not controlled by user
2638 * space, as otherwise there is no guarantee that the device is still
2639 * operating in an indoor environment.
2641 spin_lock(®_indoor_lock);
2642 if (reg_is_indoor && !reg_is_indoor_portid) {
2643 reg_is_indoor = false;
2644 reg_check_channels();
2646 spin_unlock(®_indoor_lock);
2648 reset_regdomains(true, &world_regdom);
2649 restore_alpha2(alpha2, reset_user);
2652 * If there's any pending requests we simply
2653 * stash them to a temporary pending queue and
2654 * add then after we've restored regulatory
2657 spin_lock(®_requests_lock);
2658 list_splice_tail_init(®_requests_list, &tmp_reg_req_list);
2659 spin_unlock(®_requests_lock);
2661 /* Clear beacon hints */
2662 spin_lock_bh(®_pending_beacons_lock);
2663 list_for_each_entry_safe(reg_beacon, btmp, ®_pending_beacons, list) {
2664 list_del(®_beacon->list);
2667 spin_unlock_bh(®_pending_beacons_lock);
2669 list_for_each_entry_safe(reg_beacon, btmp, ®_beacon_list, list) {
2670 list_del(®_beacon->list);
2674 /* First restore to the basic regulatory settings */
2675 world_alpha2[0] = cfg80211_world_regdom->alpha2[0];
2676 world_alpha2[1] = cfg80211_world_regdom->alpha2[1];
2678 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
2679 if (rdev->wiphy.regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED)
2681 if (rdev->wiphy.regulatory_flags & REGULATORY_CUSTOM_REG)
2682 restore_custom_reg_settings(&rdev->wiphy);
2685 regulatory_hint_core(world_alpha2);
2688 * This restores the ieee80211_regdom module parameter
2689 * preference or the last user requested regulatory
2690 * settings, user regulatory settings takes precedence.
2692 if (is_an_alpha2(alpha2))
2693 regulatory_hint_user(alpha2, NL80211_USER_REG_HINT_USER);
2695 spin_lock(®_requests_lock);
2696 list_splice_tail_init(&tmp_reg_req_list, ®_requests_list);
2697 spin_unlock(®_requests_lock);
2699 pr_debug("Kicking the queue\n");
2701 schedule_work(®_work);
2704 void regulatory_hint_disconnect(void)
2706 pr_debug("All devices are disconnected, going to restore regulatory settings\n");
2707 restore_regulatory_settings(false);
2710 static bool freq_is_chan_12_13_14(u16 freq)
2712 if (freq == ieee80211_channel_to_frequency(12, NL80211_BAND_2GHZ) ||
2713 freq == ieee80211_channel_to_frequency(13, NL80211_BAND_2GHZ) ||
2714 freq == ieee80211_channel_to_frequency(14, NL80211_BAND_2GHZ))
2719 static bool pending_reg_beacon(struct ieee80211_channel *beacon_chan)
2721 struct reg_beacon *pending_beacon;
2723 list_for_each_entry(pending_beacon, ®_pending_beacons, list)
2724 if (beacon_chan->center_freq ==
2725 pending_beacon->chan.center_freq)
2730 int regulatory_hint_found_beacon(struct wiphy *wiphy,
2731 struct ieee80211_channel *beacon_chan,
2734 struct reg_beacon *reg_beacon;
2737 if (beacon_chan->beacon_found ||
2738 beacon_chan->flags & IEEE80211_CHAN_RADAR ||
2739 (beacon_chan->band == NL80211_BAND_2GHZ &&
2740 !freq_is_chan_12_13_14(beacon_chan->center_freq)))
2743 spin_lock_bh(®_pending_beacons_lock);
2744 processing = pending_reg_beacon(beacon_chan);
2745 spin_unlock_bh(®_pending_beacons_lock);
2750 reg_beacon = kzalloc(sizeof(struct reg_beacon), gfp);
2754 pr_debug("Found new beacon on frequency: %d MHz (Ch %d) on %s\n",
2755 beacon_chan->center_freq,
2756 ieee80211_frequency_to_channel(beacon_chan->center_freq),
2759 memcpy(®_beacon->chan, beacon_chan,
2760 sizeof(struct ieee80211_channel));
2763 * Since we can be called from BH or and non-BH context
2764 * we must use spin_lock_bh()
2766 spin_lock_bh(®_pending_beacons_lock);
2767 list_add_tail(®_beacon->list, ®_pending_beacons);
2768 spin_unlock_bh(®_pending_beacons_lock);
2770 schedule_work(®_work);
2775 static void print_rd_rules(const struct ieee80211_regdomain *rd)
2778 const struct ieee80211_reg_rule *reg_rule = NULL;
2779 const struct ieee80211_freq_range *freq_range = NULL;
2780 const struct ieee80211_power_rule *power_rule = NULL;
2781 char bw[32], cac_time[32];
2783 pr_debug(" (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp), (dfs_cac_time)\n");
2785 for (i = 0; i < rd->n_reg_rules; i++) {
2786 reg_rule = &rd->reg_rules[i];
2787 freq_range = ®_rule->freq_range;
2788 power_rule = ®_rule->power_rule;
2790 if (reg_rule->flags & NL80211_RRF_AUTO_BW)
2791 snprintf(bw, sizeof(bw), "%d KHz, %d KHz AUTO",
2792 freq_range->max_bandwidth_khz,
2793 reg_get_max_bandwidth(rd, reg_rule));
2795 snprintf(bw, sizeof(bw), "%d KHz",
2796 freq_range->max_bandwidth_khz);
2798 if (reg_rule->flags & NL80211_RRF_DFS)
2799 scnprintf(cac_time, sizeof(cac_time), "%u s",
2800 reg_rule->dfs_cac_ms/1000);
2802 scnprintf(cac_time, sizeof(cac_time), "N/A");
2806 * There may not be documentation for max antenna gain
2807 * in certain regions
2809 if (power_rule->max_antenna_gain)
2810 pr_debug(" (%d KHz - %d KHz @ %s), (%d mBi, %d mBm), (%s)\n",
2811 freq_range->start_freq_khz,
2812 freq_range->end_freq_khz,
2814 power_rule->max_antenna_gain,
2815 power_rule->max_eirp,
2818 pr_debug(" (%d KHz - %d KHz @ %s), (N/A, %d mBm), (%s)\n",
2819 freq_range->start_freq_khz,
2820 freq_range->end_freq_khz,
2822 power_rule->max_eirp,
2827 bool reg_supported_dfs_region(enum nl80211_dfs_regions dfs_region)
2829 switch (dfs_region) {
2830 case NL80211_DFS_UNSET:
2831 case NL80211_DFS_FCC:
2832 case NL80211_DFS_ETSI:
2833 case NL80211_DFS_JP:
2836 pr_debug("Ignoring uknown DFS master region: %d\n", dfs_region);
2841 static void print_regdomain(const struct ieee80211_regdomain *rd)
2843 struct regulatory_request *lr = get_last_request();
2845 if (is_intersected_alpha2(rd->alpha2)) {
2846 if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) {
2847 struct cfg80211_registered_device *rdev;
2848 rdev = cfg80211_rdev_by_wiphy_idx(lr->wiphy_idx);
2850 pr_debug("Current regulatory domain updated by AP to: %c%c\n",
2851 rdev->country_ie_alpha2[0],
2852 rdev->country_ie_alpha2[1]);
2854 pr_debug("Current regulatory domain intersected:\n");
2856 pr_debug("Current regulatory domain intersected:\n");
2857 } else if (is_world_regdom(rd->alpha2)) {
2858 pr_debug("World regulatory domain updated:\n");
2860 if (is_unknown_alpha2(rd->alpha2))
2861 pr_debug("Regulatory domain changed to driver built-in settings (unknown country)\n");
2863 if (reg_request_cell_base(lr))
2864 pr_debug("Regulatory domain changed to country: %c%c by Cell Station\n",
2865 rd->alpha2[0], rd->alpha2[1]);
2867 pr_debug("Regulatory domain changed to country: %c%c\n",
2868 rd->alpha2[0], rd->alpha2[1]);
2872 pr_debug(" DFS Master region: %s", reg_dfs_region_str(rd->dfs_region));
2876 static void print_regdomain_info(const struct ieee80211_regdomain *rd)
2878 pr_debug("Regulatory domain: %c%c\n", rd->alpha2[0], rd->alpha2[1]);
2882 static int reg_set_rd_core(const struct ieee80211_regdomain *rd)
2884 if (!is_world_regdom(rd->alpha2))
2886 update_world_regdomain(rd);
2890 static int reg_set_rd_user(const struct ieee80211_regdomain *rd,
2891 struct regulatory_request *user_request)
2893 const struct ieee80211_regdomain *intersected_rd = NULL;
2895 if (!regdom_changes(rd->alpha2))
2898 if (!is_valid_rd(rd)) {
2899 pr_err("Invalid regulatory domain detected: %c%c\n",
2900 rd->alpha2[0], rd->alpha2[1]);
2901 print_regdomain_info(rd);
2905 if (!user_request->intersect) {
2906 reset_regdomains(false, rd);
2910 intersected_rd = regdom_intersect(rd, get_cfg80211_regdom());
2911 if (!intersected_rd)
2916 reset_regdomains(false, intersected_rd);
2921 static int reg_set_rd_driver(const struct ieee80211_regdomain *rd,
2922 struct regulatory_request *driver_request)
2924 const struct ieee80211_regdomain *regd;
2925 const struct ieee80211_regdomain *intersected_rd = NULL;
2926 const struct ieee80211_regdomain *tmp;
2927 struct wiphy *request_wiphy;
2929 if (is_world_regdom(rd->alpha2))
2932 if (!regdom_changes(rd->alpha2))
2935 if (!is_valid_rd(rd)) {
2936 pr_err("Invalid regulatory domain detected: %c%c\n",
2937 rd->alpha2[0], rd->alpha2[1]);
2938 print_regdomain_info(rd);
2942 request_wiphy = wiphy_idx_to_wiphy(driver_request->wiphy_idx);
2946 if (!driver_request->intersect) {
2947 if (request_wiphy->regd)
2950 regd = reg_copy_regd(rd);
2952 return PTR_ERR(regd);
2954 rcu_assign_pointer(request_wiphy->regd, regd);
2955 reset_regdomains(false, rd);
2959 intersected_rd = regdom_intersect(rd, get_cfg80211_regdom());
2960 if (!intersected_rd)
2964 * We can trash what CRDA provided now.
2965 * However if a driver requested this specific regulatory
2966 * domain we keep it for its private use
2968 tmp = get_wiphy_regdom(request_wiphy);
2969 rcu_assign_pointer(request_wiphy->regd, rd);
2970 rcu_free_regdom(tmp);
2974 reset_regdomains(false, intersected_rd);
2979 static int reg_set_rd_country_ie(const struct ieee80211_regdomain *rd,
2980 struct regulatory_request *country_ie_request)
2982 struct wiphy *request_wiphy;
2984 if (!is_alpha2_set(rd->alpha2) && !is_an_alpha2(rd->alpha2) &&
2985 !is_unknown_alpha2(rd->alpha2))
2989 * Lets only bother proceeding on the same alpha2 if the current
2990 * rd is non static (it means CRDA was present and was used last)
2991 * and the pending request came in from a country IE
2994 if (!is_valid_rd(rd)) {
2995 pr_err("Invalid regulatory domain detected: %c%c\n",
2996 rd->alpha2[0], rd->alpha2[1]);
2997 print_regdomain_info(rd);
3001 request_wiphy = wiphy_idx_to_wiphy(country_ie_request->wiphy_idx);
3005 if (country_ie_request->intersect)
3008 reset_regdomains(false, rd);
3013 * Use this call to set the current regulatory domain. Conflicts with
3014 * multiple drivers can be ironed out later. Caller must've already
3015 * kmalloc'd the rd structure.
3017 int set_regdom(const struct ieee80211_regdomain *rd,
3018 enum ieee80211_regd_source regd_src)
3020 struct regulatory_request *lr;
3021 bool user_reset = false;
3024 if (!reg_is_valid_request(rd->alpha2)) {
3029 if (regd_src == REGD_SOURCE_CRDA)
3030 reset_crda_timeouts();
3032 lr = get_last_request();
3034 /* Note that this doesn't update the wiphys, this is done below */
3035 switch (lr->initiator) {
3036 case NL80211_REGDOM_SET_BY_CORE:
3037 r = reg_set_rd_core(rd);
3039 case NL80211_REGDOM_SET_BY_USER:
3040 r = reg_set_rd_user(rd, lr);
3043 case NL80211_REGDOM_SET_BY_DRIVER:
3044 r = reg_set_rd_driver(rd, lr);
3046 case NL80211_REGDOM_SET_BY_COUNTRY_IE:
3047 r = reg_set_rd_country_ie(rd, lr);
3050 WARN(1, "invalid initiator %d\n", lr->initiator);
3058 reg_set_request_processed();
3061 /* Back to world regulatory in case of errors */
3062 restore_regulatory_settings(user_reset);
3069 /* This would make this whole thing pointless */
3070 if (WARN_ON(!lr->intersect && rd != get_cfg80211_regdom()))
3073 /* update all wiphys now with the new established regulatory domain */
3074 update_all_wiphy_regulatory(lr->initiator);
3076 print_regdomain(get_cfg80211_regdom());
3078 nl80211_send_reg_change_event(lr);
3080 reg_set_request_processed();
3085 static int __regulatory_set_wiphy_regd(struct wiphy *wiphy,
3086 struct ieee80211_regdomain *rd)
3088 const struct ieee80211_regdomain *regd;
3089 const struct ieee80211_regdomain *prev_regd;
3090 struct cfg80211_registered_device *rdev;
3092 if (WARN_ON(!wiphy || !rd))
3095 if (WARN(!(wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED),
3096 "wiphy should have REGULATORY_WIPHY_SELF_MANAGED\n"))
3099 if (WARN(!is_valid_rd(rd), "Invalid regulatory domain detected\n")) {
3100 print_regdomain_info(rd);
3104 regd = reg_copy_regd(rd);
3106 return PTR_ERR(regd);
3108 rdev = wiphy_to_rdev(wiphy);
3110 spin_lock(®_requests_lock);
3111 prev_regd = rdev->requested_regd;
3112 rdev->requested_regd = regd;
3113 spin_unlock(®_requests_lock);
3119 int regulatory_set_wiphy_regd(struct wiphy *wiphy,
3120 struct ieee80211_regdomain *rd)
3122 int ret = __regulatory_set_wiphy_regd(wiphy, rd);
3127 schedule_work(®_work);
3130 EXPORT_SYMBOL(regulatory_set_wiphy_regd);
3132 int regulatory_set_wiphy_regd_sync_rtnl(struct wiphy *wiphy,
3133 struct ieee80211_regdomain *rd)
3139 ret = __regulatory_set_wiphy_regd(wiphy, rd);
3143 /* process the request immediately */
3144 reg_process_self_managed_hints();
3147 EXPORT_SYMBOL(regulatory_set_wiphy_regd_sync_rtnl);
3149 void wiphy_regulatory_register(struct wiphy *wiphy)
3151 struct regulatory_request *lr;
3153 /* self-managed devices ignore external hints */
3154 if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED)
3155 wiphy->regulatory_flags |= REGULATORY_DISABLE_BEACON_HINTS |
3156 REGULATORY_COUNTRY_IE_IGNORE;
3158 if (!reg_dev_ignore_cell_hint(wiphy))
3159 reg_num_devs_support_basehint++;
3161 lr = get_last_request();
3162 wiphy_update_regulatory(wiphy, lr->initiator);
3163 wiphy_all_share_dfs_chan_state(wiphy);
3166 void wiphy_regulatory_deregister(struct wiphy *wiphy)
3168 struct wiphy *request_wiphy = NULL;
3169 struct regulatory_request *lr;
3171 lr = get_last_request();
3173 if (!reg_dev_ignore_cell_hint(wiphy))
3174 reg_num_devs_support_basehint--;
3176 rcu_free_regdom(get_wiphy_regdom(wiphy));
3177 RCU_INIT_POINTER(wiphy->regd, NULL);
3180 request_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx);
3182 if (!request_wiphy || request_wiphy != wiphy)
3185 lr->wiphy_idx = WIPHY_IDX_INVALID;
3186 lr->country_ie_env = ENVIRON_ANY;
3190 * See http://www.fcc.gov/document/5-ghz-unlicensed-spectrum-unii, for
3191 * UNII band definitions
3193 int cfg80211_get_unii(int freq)
3196 if (freq >= 5150 && freq <= 5250)
3200 if (freq > 5250 && freq <= 5350)
3204 if (freq > 5350 && freq <= 5470)
3208 if (freq > 5470 && freq <= 5725)
3212 if (freq > 5725 && freq <= 5825)
3218 bool regulatory_indoor_allowed(void)
3220 return reg_is_indoor;
3223 bool regulatory_pre_cac_allowed(struct wiphy *wiphy)
3225 const struct ieee80211_regdomain *regd = NULL;
3226 const struct ieee80211_regdomain *wiphy_regd = NULL;
3227 bool pre_cac_allowed = false;
3231 regd = rcu_dereference(cfg80211_regdomain);
3232 wiphy_regd = rcu_dereference(wiphy->regd);
3234 if (regd->dfs_region == NL80211_DFS_ETSI)
3235 pre_cac_allowed = true;
3239 return pre_cac_allowed;
3242 if (regd->dfs_region == wiphy_regd->dfs_region &&
3243 wiphy_regd->dfs_region == NL80211_DFS_ETSI)
3244 pre_cac_allowed = true;
3248 return pre_cac_allowed;
3251 void regulatory_propagate_dfs_state(struct wiphy *wiphy,
3252 struct cfg80211_chan_def *chandef,
3253 enum nl80211_dfs_state dfs_state,
3254 enum nl80211_radar_event event)
3256 struct cfg80211_registered_device *rdev;
3260 if (WARN_ON(!cfg80211_chandef_valid(chandef)))
3263 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
3264 if (wiphy == &rdev->wiphy)
3267 if (!reg_dfs_domain_same(wiphy, &rdev->wiphy))
3270 if (!ieee80211_get_channel(&rdev->wiphy,
3271 chandef->chan->center_freq))
3274 cfg80211_set_dfs_state(&rdev->wiphy, chandef, dfs_state);
3276 if (event == NL80211_RADAR_DETECTED ||
3277 event == NL80211_RADAR_CAC_FINISHED)
3278 cfg80211_sched_dfs_chan_update(rdev);
3280 nl80211_radar_notify(rdev, chandef, event, NULL, GFP_KERNEL);
3284 int __init regulatory_init(void)
3288 reg_pdev = platform_device_register_simple("regulatory", 0, NULL, 0);
3289 if (IS_ERR(reg_pdev))
3290 return PTR_ERR(reg_pdev);
3292 spin_lock_init(®_requests_lock);
3293 spin_lock_init(®_pending_beacons_lock);
3294 spin_lock_init(®_indoor_lock);
3296 reg_regdb_size_check();
3298 rcu_assign_pointer(cfg80211_regdomain, cfg80211_world_regdom);
3300 user_alpha2[0] = '9';
3301 user_alpha2[1] = '7';
3303 /* We always try to get an update for the static regdomain */
3304 err = regulatory_hint_core(cfg80211_world_regdom->alpha2);
3306 if (err == -ENOMEM) {
3307 platform_device_unregister(reg_pdev);
3311 * N.B. kobject_uevent_env() can fail mainly for when we're out
3312 * memory which is handled and propagated appropriately above
3313 * but it can also fail during a netlink_broadcast() or during
3314 * early boot for call_usermodehelper(). For now treat these
3315 * errors as non-fatal.
3317 pr_err("kobject_uevent_env() was unable to call CRDA during init\n");
3321 * Finally, if the user set the module parameter treat it
3324 if (!is_world_regdom(ieee80211_regdom))
3325 regulatory_hint_user(ieee80211_regdom,
3326 NL80211_USER_REG_HINT_USER);
3331 void regulatory_exit(void)
3333 struct regulatory_request *reg_request, *tmp;
3334 struct reg_beacon *reg_beacon, *btmp;
3336 cancel_work_sync(®_work);
3337 cancel_crda_timeout_sync();
3338 cancel_delayed_work_sync(®_check_chans);
3340 /* Lock to suppress warnings */
3342 reset_regdomains(true, NULL);
3345 dev_set_uevent_suppress(®_pdev->dev, true);
3347 platform_device_unregister(reg_pdev);
3349 list_for_each_entry_safe(reg_beacon, btmp, ®_pending_beacons, list) {
3350 list_del(®_beacon->list);
3354 list_for_each_entry_safe(reg_beacon, btmp, ®_beacon_list, list) {
3355 list_del(®_beacon->list);
3359 list_for_each_entry_safe(reg_request, tmp, ®_requests_list, list) {
3360 list_del(®_request->list);