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
8 * Copyright (C) 2018 - 2024 Intel Corporation
10 * Permission to use, copy, modify, and/or distribute this software for any
11 * purpose with or without fee is hereby granted, provided that the above
12 * copyright notice and this permission notice appear in all copies.
14 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
15 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
16 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
17 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
18 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
19 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
20 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
25 * DOC: Wireless regulatory infrastructure
27 * The usual implementation is for a driver to read a device EEPROM to
28 * determine which regulatory domain it should be operating under, then
29 * looking up the allowable channels in a driver-local table and finally
30 * registering those channels in the wiphy structure.
32 * Another set of compliance enforcement is for drivers to use their
33 * own compliance limits which can be stored on the EEPROM. The host
34 * driver or firmware may ensure these are used.
36 * In addition to all this we provide an extra layer of regulatory
37 * conformance. For drivers which do not have any regulatory
38 * information CRDA provides the complete regulatory solution.
39 * For others it provides a community effort on further restrictions
40 * to enhance compliance.
42 * Note: When number of rules --> infinity we will not be able to
43 * index on alpha2 any more, instead we'll probably have to
44 * rely on some SHA1 checksum of the regdomain for example.
48 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
50 #include <linux/kernel.h>
51 #include <linux/export.h>
52 #include <linux/slab.h>
53 #include <linux/list.h>
54 #include <linux/ctype.h>
55 #include <linux/nl80211.h>
56 #include <linux/platform_device.h>
57 #include <linux/verification.h>
58 #include <linux/moduleparam.h>
59 #include <linux/firmware.h>
60 #include <linux/units.h>
62 #include <net/cfg80211.h>
69 * Grace period we give before making sure all current interfaces reside on
70 * channels allowed by the current regulatory domain.
72 #define REG_ENFORCE_GRACE_MS 60000
75 * enum reg_request_treatment - regulatory request treatment
77 * @REG_REQ_OK: continue processing the regulatory request
78 * @REG_REQ_IGNORE: ignore the regulatory request
79 * @REG_REQ_INTERSECT: the regulatory domain resulting from this request should
80 * be intersected with the current one.
81 * @REG_REQ_ALREADY_SET: the regulatory request will not change the current
82 * regulatory settings, and no further processing is required.
84 enum reg_request_treatment {
91 static struct regulatory_request core_request_world = {
92 .initiator = NL80211_REGDOM_SET_BY_CORE,
97 .country_ie_env = ENVIRON_ANY,
101 * Receipt of information from last regulatory request,
102 * protected by RTNL (and can be accessed with RCU protection)
104 static struct regulatory_request __rcu *last_request =
105 (void __force __rcu *)&core_request_world;
107 /* To trigger userspace events and load firmware */
108 static struct platform_device *reg_pdev;
111 * Central wireless core regulatory domains, we only need two,
112 * the current one and a world regulatory domain in case we have no
113 * information to give us an alpha2.
114 * (protected by RTNL, can be read under RCU)
116 const struct ieee80211_regdomain __rcu *cfg80211_regdomain;
119 * Number of devices that registered to the core
120 * that support cellular base station regulatory hints
121 * (protected by RTNL)
123 static int reg_num_devs_support_basehint;
126 * State variable indicating if the platform on which the devices
127 * are attached is operating in an indoor environment. The state variable
128 * is relevant for all registered devices.
130 static bool reg_is_indoor;
131 static DEFINE_SPINLOCK(reg_indoor_lock);
133 /* Used to track the userspace process controlling the indoor setting */
134 static u32 reg_is_indoor_portid;
136 static void restore_regulatory_settings(bool reset_user, bool cached);
137 static void print_regdomain(const struct ieee80211_regdomain *rd);
138 static void reg_process_hint(struct regulatory_request *reg_request);
140 static const struct ieee80211_regdomain *get_cfg80211_regdom(void)
142 return rcu_dereference_rtnl(cfg80211_regdomain);
146 * Returns the regulatory domain associated with the wiphy.
148 * Requires any of RTNL, wiphy mutex or RCU protection.
150 const struct ieee80211_regdomain *get_wiphy_regdom(struct wiphy *wiphy)
152 return rcu_dereference_check(wiphy->regd,
153 lockdep_is_held(&wiphy->mtx) ||
154 lockdep_rtnl_is_held());
156 EXPORT_SYMBOL(get_wiphy_regdom);
158 static const char *reg_dfs_region_str(enum nl80211_dfs_regions dfs_region)
160 switch (dfs_region) {
161 case NL80211_DFS_UNSET:
163 case NL80211_DFS_FCC:
165 case NL80211_DFS_ETSI:
173 enum nl80211_dfs_regions reg_get_dfs_region(struct wiphy *wiphy)
175 const struct ieee80211_regdomain *regd = NULL;
176 const struct ieee80211_regdomain *wiphy_regd = NULL;
177 enum nl80211_dfs_regions dfs_region;
180 regd = get_cfg80211_regdom();
181 dfs_region = regd->dfs_region;
186 wiphy_regd = get_wiphy_regdom(wiphy);
190 if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) {
191 dfs_region = wiphy_regd->dfs_region;
195 if (wiphy_regd->dfs_region == regd->dfs_region)
198 pr_debug("%s: device specific dfs_region (%s) disagrees with cfg80211's central dfs_region (%s)\n",
199 dev_name(&wiphy->dev),
200 reg_dfs_region_str(wiphy_regd->dfs_region),
201 reg_dfs_region_str(regd->dfs_region));
209 static void rcu_free_regdom(const struct ieee80211_regdomain *r)
213 kfree_rcu((struct ieee80211_regdomain *)r, rcu_head);
216 static struct regulatory_request *get_last_request(void)
218 return rcu_dereference_rtnl(last_request);
221 /* Used to queue up regulatory hints */
222 static LIST_HEAD(reg_requests_list);
223 static DEFINE_SPINLOCK(reg_requests_lock);
225 /* Used to queue up beacon hints for review */
226 static LIST_HEAD(reg_pending_beacons);
227 static DEFINE_SPINLOCK(reg_pending_beacons_lock);
229 /* Used to keep track of processed beacon hints */
230 static LIST_HEAD(reg_beacon_list);
233 struct list_head list;
234 struct ieee80211_channel chan;
237 static void reg_check_chans_work(struct work_struct *work);
238 static DECLARE_DELAYED_WORK(reg_check_chans, reg_check_chans_work);
240 static void reg_todo(struct work_struct *work);
241 static DECLARE_WORK(reg_work, reg_todo);
243 /* We keep a static world regulatory domain in case of the absence of CRDA */
244 static const struct ieee80211_regdomain world_regdom = {
248 /* IEEE 802.11b/g, channels 1..11 */
249 REG_RULE(2412-10, 2462+10, 40, 6, 20, 0),
250 /* IEEE 802.11b/g, channels 12..13. */
251 REG_RULE(2467-10, 2472+10, 20, 6, 20,
252 NL80211_RRF_NO_IR | NL80211_RRF_AUTO_BW),
253 /* IEEE 802.11 channel 14 - Only JP enables
254 * this and for 802.11b only */
255 REG_RULE(2484-10, 2484+10, 20, 6, 20,
257 NL80211_RRF_NO_OFDM),
258 /* IEEE 802.11a, channel 36..48 */
259 REG_RULE(5180-10, 5240+10, 80, 6, 20,
261 NL80211_RRF_AUTO_BW),
263 /* IEEE 802.11a, channel 52..64 - DFS required */
264 REG_RULE(5260-10, 5320+10, 80, 6, 20,
266 NL80211_RRF_AUTO_BW |
269 /* IEEE 802.11a, channel 100..144 - DFS required */
270 REG_RULE(5500-10, 5720+10, 160, 6, 20,
274 /* IEEE 802.11a, channel 149..165 */
275 REG_RULE(5745-10, 5825+10, 80, 6, 20,
278 /* IEEE 802.11ad (60GHz), channels 1..3 */
279 REG_RULE(56160+2160*1-1080, 56160+2160*3+1080, 2160, 0, 0, 0),
283 /* protected by RTNL */
284 static const struct ieee80211_regdomain *cfg80211_world_regdom =
287 static char *ieee80211_regdom = "00";
288 static char user_alpha2[2];
289 static const struct ieee80211_regdomain *cfg80211_user_regdom;
291 module_param(ieee80211_regdom, charp, 0444);
292 MODULE_PARM_DESC(ieee80211_regdom, "IEEE 802.11 regulatory domain code");
294 static void reg_free_request(struct regulatory_request *request)
296 if (request == &core_request_world)
299 if (request != get_last_request())
303 static void reg_free_last_request(void)
305 struct regulatory_request *lr = get_last_request();
307 if (lr != &core_request_world && lr)
308 kfree_rcu(lr, rcu_head);
311 static void reg_update_last_request(struct regulatory_request *request)
313 struct regulatory_request *lr;
315 lr = get_last_request();
319 reg_free_last_request();
320 rcu_assign_pointer(last_request, request);
323 static void reset_regdomains(bool full_reset,
324 const struct ieee80211_regdomain *new_regdom)
326 const struct ieee80211_regdomain *r;
330 r = get_cfg80211_regdom();
332 /* avoid freeing static information or freeing something twice */
333 if (r == cfg80211_world_regdom)
335 if (cfg80211_world_regdom == &world_regdom)
336 cfg80211_world_regdom = NULL;
337 if (r == &world_regdom)
341 rcu_free_regdom(cfg80211_world_regdom);
343 cfg80211_world_regdom = &world_regdom;
344 rcu_assign_pointer(cfg80211_regdomain, new_regdom);
349 reg_update_last_request(&core_request_world);
353 * Dynamic world regulatory domain requested by the wireless
354 * core upon initialization
356 static void update_world_regdomain(const struct ieee80211_regdomain *rd)
358 struct regulatory_request *lr;
360 lr = get_last_request();
364 reset_regdomains(false, rd);
366 cfg80211_world_regdom = rd;
369 bool is_world_regdom(const char *alpha2)
373 return alpha2[0] == '0' && alpha2[1] == '0';
376 static bool is_alpha2_set(const char *alpha2)
380 return alpha2[0] && alpha2[1];
383 static bool is_unknown_alpha2(const char *alpha2)
388 * Special case where regulatory domain was built by driver
389 * but a specific alpha2 cannot be determined
391 return alpha2[0] == '9' && alpha2[1] == '9';
394 static bool is_intersected_alpha2(const char *alpha2)
399 * Special case where regulatory domain is the
400 * result of an intersection between two regulatory domain
403 return alpha2[0] == '9' && alpha2[1] == '8';
406 static bool is_an_alpha2(const char *alpha2)
410 return isalpha(alpha2[0]) && isalpha(alpha2[1]);
413 static bool alpha2_equal(const char *alpha2_x, const char *alpha2_y)
415 if (!alpha2_x || !alpha2_y)
417 return alpha2_x[0] == alpha2_y[0] && alpha2_x[1] == alpha2_y[1];
420 static bool regdom_changes(const char *alpha2)
422 const struct ieee80211_regdomain *r = get_cfg80211_regdom();
426 return !alpha2_equal(r->alpha2, alpha2);
430 * The NL80211_REGDOM_SET_BY_USER regdom alpha2 is cached, this lets
431 * you know if a valid regulatory hint with NL80211_REGDOM_SET_BY_USER
432 * has ever been issued.
434 static bool is_user_regdom_saved(void)
436 if (user_alpha2[0] == '9' && user_alpha2[1] == '7')
439 /* This would indicate a mistake on the design */
440 if (WARN(!is_world_regdom(user_alpha2) && !is_an_alpha2(user_alpha2),
441 "Unexpected user alpha2: %c%c\n",
442 user_alpha2[0], user_alpha2[1]))
448 static const struct ieee80211_regdomain *
449 reg_copy_regd(const struct ieee80211_regdomain *src_regd)
451 struct ieee80211_regdomain *regd;
454 regd = kzalloc(struct_size(regd, reg_rules, src_regd->n_reg_rules),
457 return ERR_PTR(-ENOMEM);
459 memcpy(regd, src_regd, sizeof(struct ieee80211_regdomain));
461 for (i = 0; i < src_regd->n_reg_rules; i++)
462 memcpy(®d->reg_rules[i], &src_regd->reg_rules[i],
463 sizeof(struct ieee80211_reg_rule));
468 static void cfg80211_save_user_regdom(const struct ieee80211_regdomain *rd)
472 if (!IS_ERR(cfg80211_user_regdom))
473 kfree(cfg80211_user_regdom);
474 cfg80211_user_regdom = reg_copy_regd(rd);
477 struct reg_regdb_apply_request {
478 struct list_head list;
479 const struct ieee80211_regdomain *regdom;
482 static LIST_HEAD(reg_regdb_apply_list);
483 static DEFINE_MUTEX(reg_regdb_apply_mutex);
485 static void reg_regdb_apply(struct work_struct *work)
487 struct reg_regdb_apply_request *request;
491 mutex_lock(®_regdb_apply_mutex);
492 while (!list_empty(®_regdb_apply_list)) {
493 request = list_first_entry(®_regdb_apply_list,
494 struct reg_regdb_apply_request,
496 list_del(&request->list);
498 set_regdom(request->regdom, REGD_SOURCE_INTERNAL_DB);
501 mutex_unlock(®_regdb_apply_mutex);
506 static DECLARE_WORK(reg_regdb_work, reg_regdb_apply);
508 static int reg_schedule_apply(const struct ieee80211_regdomain *regdom)
510 struct reg_regdb_apply_request *request;
512 request = kzalloc(sizeof(struct reg_regdb_apply_request), GFP_KERNEL);
518 request->regdom = regdom;
520 mutex_lock(®_regdb_apply_mutex);
521 list_add_tail(&request->list, ®_regdb_apply_list);
522 mutex_unlock(®_regdb_apply_mutex);
524 schedule_work(®_regdb_work);
528 #ifdef CONFIG_CFG80211_CRDA_SUPPORT
529 /* Max number of consecutive attempts to communicate with CRDA */
530 #define REG_MAX_CRDA_TIMEOUTS 10
532 static u32 reg_crda_timeouts;
534 static void crda_timeout_work(struct work_struct *work);
535 static DECLARE_DELAYED_WORK(crda_timeout, crda_timeout_work);
537 static void crda_timeout_work(struct work_struct *work)
539 pr_debug("Timeout while waiting for CRDA to reply, restoring regulatory settings\n");
542 restore_regulatory_settings(true, false);
546 static void cancel_crda_timeout(void)
548 cancel_delayed_work(&crda_timeout);
551 static void cancel_crda_timeout_sync(void)
553 cancel_delayed_work_sync(&crda_timeout);
556 static void reset_crda_timeouts(void)
558 reg_crda_timeouts = 0;
562 * This lets us keep regulatory code which is updated on a regulatory
563 * basis in userspace.
565 static int call_crda(const char *alpha2)
568 char *env[] = { country, NULL };
571 snprintf(country, sizeof(country), "COUNTRY=%c%c",
572 alpha2[0], alpha2[1]);
574 if (reg_crda_timeouts > REG_MAX_CRDA_TIMEOUTS) {
575 pr_debug("Exceeded CRDA call max attempts. Not calling CRDA\n");
579 if (!is_world_regdom((char *) alpha2))
580 pr_debug("Calling CRDA for country: %c%c\n",
581 alpha2[0], alpha2[1]);
583 pr_debug("Calling CRDA to update world regulatory domain\n");
585 ret = kobject_uevent_env(®_pdev->dev.kobj, KOBJ_CHANGE, env);
589 queue_delayed_work(system_power_efficient_wq,
590 &crda_timeout, msecs_to_jiffies(3142));
594 static inline void cancel_crda_timeout(void) {}
595 static inline void cancel_crda_timeout_sync(void) {}
596 static inline void reset_crda_timeouts(void) {}
597 static inline int call_crda(const char *alpha2)
601 #endif /* CONFIG_CFG80211_CRDA_SUPPORT */
603 /* code to directly load a firmware database through request_firmware */
604 static const struct fwdb_header *regdb;
606 struct fwdb_country {
609 /* this struct cannot be extended */
610 } __packed __aligned(4);
612 struct fwdb_collection {
616 /* no optional data yet */
617 /* aligned to 2, then followed by __be16 array of rule pointers */
618 } __packed __aligned(4);
621 FWDB_FLAG_NO_OFDM = BIT(0),
622 FWDB_FLAG_NO_OUTDOOR = BIT(1),
623 FWDB_FLAG_DFS = BIT(2),
624 FWDB_FLAG_NO_IR = BIT(3),
625 FWDB_FLAG_AUTO_BW = BIT(4),
634 struct fwdb_wmm_rule {
635 struct fwdb_wmm_ac client[IEEE80211_NUM_ACS];
636 struct fwdb_wmm_ac ap[IEEE80211_NUM_ACS];
643 __be32 start, end, max_bw;
644 /* start of optional data */
647 } __packed __aligned(4);
649 #define FWDB_MAGIC 0x52474442
650 #define FWDB_VERSION 20
655 struct fwdb_country country[];
656 } __packed __aligned(4);
658 static int ecw2cw(int ecw)
660 return (1 << ecw) - 1;
663 static bool valid_wmm(struct fwdb_wmm_rule *rule)
665 struct fwdb_wmm_ac *ac = (struct fwdb_wmm_ac *)rule;
668 for (i = 0; i < IEEE80211_NUM_ACS * 2; i++) {
669 u16 cw_min = ecw2cw((ac[i].ecw & 0xf0) >> 4);
670 u16 cw_max = ecw2cw(ac[i].ecw & 0x0f);
671 u8 aifsn = ac[i].aifsn;
673 if (cw_min >= cw_max)
683 static bool valid_rule(const u8 *data, unsigned int size, u16 rule_ptr)
685 struct fwdb_rule *rule = (void *)(data + (rule_ptr << 2));
687 if ((u8 *)rule + sizeof(rule->len) > data + size)
690 /* mandatory fields */
691 if (rule->len < offsetofend(struct fwdb_rule, max_bw))
693 if (rule->len >= offsetofend(struct fwdb_rule, wmm_ptr)) {
694 u32 wmm_ptr = be16_to_cpu(rule->wmm_ptr) << 2;
695 struct fwdb_wmm_rule *wmm;
697 if (wmm_ptr + sizeof(struct fwdb_wmm_rule) > size)
700 wmm = (void *)(data + wmm_ptr);
708 static bool valid_country(const u8 *data, unsigned int size,
709 const struct fwdb_country *country)
711 unsigned int ptr = be16_to_cpu(country->coll_ptr) << 2;
712 struct fwdb_collection *coll = (void *)(data + ptr);
716 /* make sure we can read len/n_rules */
717 if ((u8 *)coll + offsetofend(typeof(*coll), n_rules) > data + size)
720 /* make sure base struct and all rules fit */
721 if ((u8 *)coll + ALIGN(coll->len, 2) +
722 (coll->n_rules * 2) > data + size)
725 /* mandatory fields must exist */
726 if (coll->len < offsetofend(struct fwdb_collection, dfs_region))
729 rules_ptr = (void *)((u8 *)coll + ALIGN(coll->len, 2));
731 for (i = 0; i < coll->n_rules; i++) {
732 u16 rule_ptr = be16_to_cpu(rules_ptr[i]);
734 if (!valid_rule(data, size, rule_ptr))
741 #ifdef CONFIG_CFG80211_REQUIRE_SIGNED_REGDB
742 #include <keys/asymmetric-type.h>
744 static struct key *builtin_regdb_keys;
746 static int __init load_builtin_regdb_keys(void)
749 keyring_alloc(".builtin_regdb_keys",
750 KUIDT_INIT(0), KGIDT_INIT(0), current_cred(),
751 ((KEY_POS_ALL & ~KEY_POS_SETATTR) |
752 KEY_USR_VIEW | KEY_USR_READ | KEY_USR_SEARCH),
753 KEY_ALLOC_NOT_IN_QUOTA, NULL, NULL);
754 if (IS_ERR(builtin_regdb_keys))
755 return PTR_ERR(builtin_regdb_keys);
757 pr_notice("Loading compiled-in X.509 certificates for regulatory database\n");
759 #ifdef CONFIG_CFG80211_USE_KERNEL_REGDB_KEYS
760 x509_load_certificate_list(shipped_regdb_certs,
761 shipped_regdb_certs_len,
764 #ifdef CONFIG_CFG80211_EXTRA_REGDB_KEYDIR
765 if (CONFIG_CFG80211_EXTRA_REGDB_KEYDIR[0] != '\0')
766 x509_load_certificate_list(extra_regdb_certs,
767 extra_regdb_certs_len,
774 MODULE_FIRMWARE("regulatory.db.p7s");
776 static bool regdb_has_valid_signature(const u8 *data, unsigned int size)
778 const struct firmware *sig;
781 if (request_firmware(&sig, "regulatory.db.p7s", ®_pdev->dev))
784 result = verify_pkcs7_signature(data, size, sig->data, sig->size,
786 VERIFYING_UNSPECIFIED_SIGNATURE,
789 release_firmware(sig);
794 static void free_regdb_keyring(void)
796 key_put(builtin_regdb_keys);
799 static int load_builtin_regdb_keys(void)
804 static bool regdb_has_valid_signature(const u8 *data, unsigned int size)
809 static void free_regdb_keyring(void)
812 #endif /* CONFIG_CFG80211_REQUIRE_SIGNED_REGDB */
814 static bool valid_regdb(const u8 *data, unsigned int size)
816 const struct fwdb_header *hdr = (void *)data;
817 const struct fwdb_country *country;
819 if (size < sizeof(*hdr))
822 if (hdr->magic != cpu_to_be32(FWDB_MAGIC))
825 if (hdr->version != cpu_to_be32(FWDB_VERSION))
828 if (!regdb_has_valid_signature(data, size))
831 country = &hdr->country[0];
832 while ((u8 *)(country + 1) <= data + size) {
833 if (!country->coll_ptr)
835 if (!valid_country(data, size, country))
843 static void set_wmm_rule(const struct fwdb_header *db,
844 const struct fwdb_country *country,
845 const struct fwdb_rule *rule,
846 struct ieee80211_reg_rule *rrule)
848 struct ieee80211_wmm_rule *wmm_rule = &rrule->wmm_rule;
849 struct fwdb_wmm_rule *wmm;
850 unsigned int i, wmm_ptr;
852 wmm_ptr = be16_to_cpu(rule->wmm_ptr) << 2;
853 wmm = (void *)((u8 *)db + wmm_ptr);
855 if (!valid_wmm(wmm)) {
856 pr_err("Invalid regulatory WMM rule %u-%u in domain %c%c\n",
857 be32_to_cpu(rule->start), be32_to_cpu(rule->end),
858 country->alpha2[0], country->alpha2[1]);
862 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
863 wmm_rule->client[i].cw_min =
864 ecw2cw((wmm->client[i].ecw & 0xf0) >> 4);
865 wmm_rule->client[i].cw_max = ecw2cw(wmm->client[i].ecw & 0x0f);
866 wmm_rule->client[i].aifsn = wmm->client[i].aifsn;
867 wmm_rule->client[i].cot =
868 1000 * be16_to_cpu(wmm->client[i].cot);
869 wmm_rule->ap[i].cw_min = ecw2cw((wmm->ap[i].ecw & 0xf0) >> 4);
870 wmm_rule->ap[i].cw_max = ecw2cw(wmm->ap[i].ecw & 0x0f);
871 wmm_rule->ap[i].aifsn = wmm->ap[i].aifsn;
872 wmm_rule->ap[i].cot = 1000 * be16_to_cpu(wmm->ap[i].cot);
875 rrule->has_wmm = true;
878 static int __regdb_query_wmm(const struct fwdb_header *db,
879 const struct fwdb_country *country, int freq,
880 struct ieee80211_reg_rule *rrule)
882 unsigned int ptr = be16_to_cpu(country->coll_ptr) << 2;
883 struct fwdb_collection *coll = (void *)((u8 *)db + ptr);
886 for (i = 0; i < coll->n_rules; i++) {
887 __be16 *rules_ptr = (void *)((u8 *)coll + ALIGN(coll->len, 2));
888 unsigned int rule_ptr = be16_to_cpu(rules_ptr[i]) << 2;
889 struct fwdb_rule *rule = (void *)((u8 *)db + rule_ptr);
891 if (rule->len < offsetofend(struct fwdb_rule, wmm_ptr))
894 if (freq >= KHZ_TO_MHZ(be32_to_cpu(rule->start)) &&
895 freq <= KHZ_TO_MHZ(be32_to_cpu(rule->end))) {
896 set_wmm_rule(db, country, rule, rrule);
904 int reg_query_regdb_wmm(char *alpha2, int freq, struct ieee80211_reg_rule *rule)
906 const struct fwdb_header *hdr = regdb;
907 const struct fwdb_country *country;
913 return PTR_ERR(regdb);
915 country = &hdr->country[0];
916 while (country->coll_ptr) {
917 if (alpha2_equal(alpha2, country->alpha2))
918 return __regdb_query_wmm(regdb, country, freq, rule);
925 EXPORT_SYMBOL(reg_query_regdb_wmm);
927 static int regdb_query_country(const struct fwdb_header *db,
928 const struct fwdb_country *country)
930 unsigned int ptr = be16_to_cpu(country->coll_ptr) << 2;
931 struct fwdb_collection *coll = (void *)((u8 *)db + ptr);
932 struct ieee80211_regdomain *regdom;
935 regdom = kzalloc(struct_size(regdom, reg_rules, coll->n_rules),
940 regdom->n_reg_rules = coll->n_rules;
941 regdom->alpha2[0] = country->alpha2[0];
942 regdom->alpha2[1] = country->alpha2[1];
943 regdom->dfs_region = coll->dfs_region;
945 for (i = 0; i < regdom->n_reg_rules; i++) {
946 __be16 *rules_ptr = (void *)((u8 *)coll + ALIGN(coll->len, 2));
947 unsigned int rule_ptr = be16_to_cpu(rules_ptr[i]) << 2;
948 struct fwdb_rule *rule = (void *)((u8 *)db + rule_ptr);
949 struct ieee80211_reg_rule *rrule = ®dom->reg_rules[i];
951 rrule->freq_range.start_freq_khz = be32_to_cpu(rule->start);
952 rrule->freq_range.end_freq_khz = be32_to_cpu(rule->end);
953 rrule->freq_range.max_bandwidth_khz = be32_to_cpu(rule->max_bw);
955 rrule->power_rule.max_antenna_gain = 0;
956 rrule->power_rule.max_eirp = be16_to_cpu(rule->max_eirp);
959 if (rule->flags & FWDB_FLAG_NO_OFDM)
960 rrule->flags |= NL80211_RRF_NO_OFDM;
961 if (rule->flags & FWDB_FLAG_NO_OUTDOOR)
962 rrule->flags |= NL80211_RRF_NO_OUTDOOR;
963 if (rule->flags & FWDB_FLAG_DFS)
964 rrule->flags |= NL80211_RRF_DFS;
965 if (rule->flags & FWDB_FLAG_NO_IR)
966 rrule->flags |= NL80211_RRF_NO_IR;
967 if (rule->flags & FWDB_FLAG_AUTO_BW)
968 rrule->flags |= NL80211_RRF_AUTO_BW;
970 rrule->dfs_cac_ms = 0;
972 /* handle optional data */
973 if (rule->len >= offsetofend(struct fwdb_rule, cac_timeout))
975 1000 * be16_to_cpu(rule->cac_timeout);
976 if (rule->len >= offsetofend(struct fwdb_rule, wmm_ptr))
977 set_wmm_rule(db, country, rule, rrule);
980 return reg_schedule_apply(regdom);
983 static int query_regdb(const char *alpha2)
985 const struct fwdb_header *hdr = regdb;
986 const struct fwdb_country *country;
991 return PTR_ERR(regdb);
993 country = &hdr->country[0];
994 while (country->coll_ptr) {
995 if (alpha2_equal(alpha2, country->alpha2))
996 return regdb_query_country(regdb, country);
1003 static void regdb_fw_cb(const struct firmware *fw, void *context)
1006 bool restore = true;
1010 pr_info("failed to load regulatory.db\n");
1011 set_error = -ENODATA;
1012 } else if (!valid_regdb(fw->data, fw->size)) {
1013 pr_info("loaded regulatory.db is malformed or signature is missing/invalid\n");
1014 set_error = -EINVAL;
1018 if (regdb && !IS_ERR(regdb)) {
1019 /* negative case - a bug
1020 * positive case - can happen due to race in case of multiple cb's in
1021 * queue, due to usage of asynchronous callback
1023 * Either case, just restore and free new db.
1025 } else if (set_error) {
1026 regdb = ERR_PTR(set_error);
1028 db = kmemdup(fw->data, fw->size, GFP_KERNEL);
1031 restore = context && query_regdb(context);
1038 restore_regulatory_settings(true, false);
1044 release_firmware(fw);
1047 MODULE_FIRMWARE("regulatory.db");
1049 static int query_regdb_file(const char *alpha2)
1056 return query_regdb(alpha2);
1058 alpha2 = kmemdup(alpha2, 2, GFP_KERNEL);
1062 err = request_firmware_nowait(THIS_MODULE, true, "regulatory.db",
1063 ®_pdev->dev, GFP_KERNEL,
1064 (void *)alpha2, regdb_fw_cb);
1071 int reg_reload_regdb(void)
1073 const struct firmware *fw;
1076 const struct ieee80211_regdomain *current_regdomain;
1077 struct regulatory_request *request;
1079 err = request_firmware(&fw, "regulatory.db", ®_pdev->dev);
1083 if (!valid_regdb(fw->data, fw->size)) {
1088 db = kmemdup(fw->data, fw->size, GFP_KERNEL);
1095 if (!IS_ERR_OR_NULL(regdb))
1099 /* reset regulatory domain */
1100 current_regdomain = get_cfg80211_regdom();
1102 request = kzalloc(sizeof(*request), GFP_KERNEL);
1108 request->wiphy_idx = WIPHY_IDX_INVALID;
1109 request->alpha2[0] = current_regdomain->alpha2[0];
1110 request->alpha2[1] = current_regdomain->alpha2[1];
1111 request->initiator = NL80211_REGDOM_SET_BY_CORE;
1112 request->user_reg_hint_type = NL80211_USER_REG_HINT_USER;
1114 reg_process_hint(request);
1119 release_firmware(fw);
1123 static bool reg_query_database(struct regulatory_request *request)
1125 if (query_regdb_file(request->alpha2) == 0)
1128 if (call_crda(request->alpha2) == 0)
1134 bool reg_is_valid_request(const char *alpha2)
1136 struct regulatory_request *lr = get_last_request();
1138 if (!lr || lr->processed)
1141 return alpha2_equal(lr->alpha2, alpha2);
1144 static const struct ieee80211_regdomain *reg_get_regdomain(struct wiphy *wiphy)
1146 struct regulatory_request *lr = get_last_request();
1149 * Follow the driver's regulatory domain, if present, unless a country
1150 * IE has been processed or a user wants to help complaince further
1152 if (lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE &&
1153 lr->initiator != NL80211_REGDOM_SET_BY_USER &&
1155 return get_wiphy_regdom(wiphy);
1157 return get_cfg80211_regdom();
1161 reg_get_max_bandwidth_from_range(const struct ieee80211_regdomain *rd,
1162 const struct ieee80211_reg_rule *rule)
1164 const struct ieee80211_freq_range *freq_range = &rule->freq_range;
1165 const struct ieee80211_freq_range *freq_range_tmp;
1166 const struct ieee80211_reg_rule *tmp;
1167 u32 start_freq, end_freq, idx, no;
1169 for (idx = 0; idx < rd->n_reg_rules; idx++)
1170 if (rule == &rd->reg_rules[idx])
1173 if (idx == rd->n_reg_rules)
1176 /* get start_freq */
1180 tmp = &rd->reg_rules[--no];
1181 freq_range_tmp = &tmp->freq_range;
1183 if (freq_range_tmp->end_freq_khz < freq_range->start_freq_khz)
1186 freq_range = freq_range_tmp;
1189 start_freq = freq_range->start_freq_khz;
1192 freq_range = &rule->freq_range;
1195 while (no < rd->n_reg_rules - 1) {
1196 tmp = &rd->reg_rules[++no];
1197 freq_range_tmp = &tmp->freq_range;
1199 if (freq_range_tmp->start_freq_khz > freq_range->end_freq_khz)
1202 freq_range = freq_range_tmp;
1205 end_freq = freq_range->end_freq_khz;
1207 return end_freq - start_freq;
1210 unsigned int reg_get_max_bandwidth(const struct ieee80211_regdomain *rd,
1211 const struct ieee80211_reg_rule *rule)
1213 unsigned int bw = reg_get_max_bandwidth_from_range(rd, rule);
1215 if (rule->flags & NL80211_RRF_NO_320MHZ)
1216 bw = min_t(unsigned int, bw, MHZ_TO_KHZ(160));
1217 if (rule->flags & NL80211_RRF_NO_160MHZ)
1218 bw = min_t(unsigned int, bw, MHZ_TO_KHZ(80));
1219 if (rule->flags & NL80211_RRF_NO_80MHZ)
1220 bw = min_t(unsigned int, bw, MHZ_TO_KHZ(40));
1223 * HT40+/HT40- limits are handled per-channel. Only limit BW if both
1226 if (rule->flags & NL80211_RRF_NO_HT40MINUS &&
1227 rule->flags & NL80211_RRF_NO_HT40PLUS)
1228 bw = min_t(unsigned int, bw, MHZ_TO_KHZ(20));
1233 /* Sanity check on a regulatory rule */
1234 static bool is_valid_reg_rule(const struct ieee80211_reg_rule *rule)
1236 const struct ieee80211_freq_range *freq_range = &rule->freq_range;
1239 if (freq_range->start_freq_khz <= 0 || freq_range->end_freq_khz <= 0)
1242 if (freq_range->start_freq_khz > freq_range->end_freq_khz)
1245 freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz;
1247 if (freq_range->end_freq_khz <= freq_range->start_freq_khz ||
1248 freq_range->max_bandwidth_khz > freq_diff)
1254 static bool is_valid_rd(const struct ieee80211_regdomain *rd)
1256 const struct ieee80211_reg_rule *reg_rule = NULL;
1259 if (!rd->n_reg_rules)
1262 if (WARN_ON(rd->n_reg_rules > NL80211_MAX_SUPP_REG_RULES))
1265 for (i = 0; i < rd->n_reg_rules; i++) {
1266 reg_rule = &rd->reg_rules[i];
1267 if (!is_valid_reg_rule(reg_rule))
1275 * freq_in_rule_band - tells us if a frequency is in a frequency band
1276 * @freq_range: frequency rule we want to query
1277 * @freq_khz: frequency we are inquiring about
1279 * This lets us know if a specific frequency rule is or is not relevant to
1280 * a specific frequency's band. Bands are device specific and artificial
1281 * definitions (the "2.4 GHz band", the "5 GHz band" and the "60GHz band"),
1282 * however it is safe for now to assume that a frequency rule should not be
1283 * part of a frequency's band if the start freq or end freq are off by more
1284 * than 2 GHz for the 2.4 and 5 GHz bands, and by more than 20 GHz for the
1286 * This resolution can be lowered and should be considered as we add
1287 * regulatory rule support for other "bands".
1289 * Returns: whether or not the frequency is in the range
1291 static bool freq_in_rule_band(const struct ieee80211_freq_range *freq_range,
1295 * From 802.11ad: directional multi-gigabit (DMG):
1296 * Pertaining to operation in a frequency band containing a channel
1297 * with the Channel starting frequency above 45 GHz.
1299 u32 limit = freq_khz > 45 * KHZ_PER_GHZ ? 20 * KHZ_PER_GHZ : 2 * KHZ_PER_GHZ;
1300 if (abs(freq_khz - freq_range->start_freq_khz) <= limit)
1302 if (abs(freq_khz - freq_range->end_freq_khz) <= limit)
1308 * Later on we can perhaps use the more restrictive DFS
1309 * region but we don't have information for that yet so
1310 * for now simply disallow conflicts.
1312 static enum nl80211_dfs_regions
1313 reg_intersect_dfs_region(const enum nl80211_dfs_regions dfs_region1,
1314 const enum nl80211_dfs_regions dfs_region2)
1316 if (dfs_region1 != dfs_region2)
1317 return NL80211_DFS_UNSET;
1321 static void reg_wmm_rules_intersect(const struct ieee80211_wmm_ac *wmm_ac1,
1322 const struct ieee80211_wmm_ac *wmm_ac2,
1323 struct ieee80211_wmm_ac *intersect)
1325 intersect->cw_min = max_t(u16, wmm_ac1->cw_min, wmm_ac2->cw_min);
1326 intersect->cw_max = max_t(u16, wmm_ac1->cw_max, wmm_ac2->cw_max);
1327 intersect->cot = min_t(u16, wmm_ac1->cot, wmm_ac2->cot);
1328 intersect->aifsn = max_t(u8, wmm_ac1->aifsn, wmm_ac2->aifsn);
1332 * Helper for regdom_intersect(), this does the real
1333 * mathematical intersection fun
1335 static int reg_rules_intersect(const struct ieee80211_regdomain *rd1,
1336 const struct ieee80211_regdomain *rd2,
1337 const struct ieee80211_reg_rule *rule1,
1338 const struct ieee80211_reg_rule *rule2,
1339 struct ieee80211_reg_rule *intersected_rule)
1341 const struct ieee80211_freq_range *freq_range1, *freq_range2;
1342 struct ieee80211_freq_range *freq_range;
1343 const struct ieee80211_power_rule *power_rule1, *power_rule2;
1344 struct ieee80211_power_rule *power_rule;
1345 const struct ieee80211_wmm_rule *wmm_rule1, *wmm_rule2;
1346 struct ieee80211_wmm_rule *wmm_rule;
1347 u32 freq_diff, max_bandwidth1, max_bandwidth2;
1349 freq_range1 = &rule1->freq_range;
1350 freq_range2 = &rule2->freq_range;
1351 freq_range = &intersected_rule->freq_range;
1353 power_rule1 = &rule1->power_rule;
1354 power_rule2 = &rule2->power_rule;
1355 power_rule = &intersected_rule->power_rule;
1357 wmm_rule1 = &rule1->wmm_rule;
1358 wmm_rule2 = &rule2->wmm_rule;
1359 wmm_rule = &intersected_rule->wmm_rule;
1361 freq_range->start_freq_khz = max(freq_range1->start_freq_khz,
1362 freq_range2->start_freq_khz);
1363 freq_range->end_freq_khz = min(freq_range1->end_freq_khz,
1364 freq_range2->end_freq_khz);
1366 max_bandwidth1 = freq_range1->max_bandwidth_khz;
1367 max_bandwidth2 = freq_range2->max_bandwidth_khz;
1369 if (rule1->flags & NL80211_RRF_AUTO_BW)
1370 max_bandwidth1 = reg_get_max_bandwidth(rd1, rule1);
1371 if (rule2->flags & NL80211_RRF_AUTO_BW)
1372 max_bandwidth2 = reg_get_max_bandwidth(rd2, rule2);
1374 freq_range->max_bandwidth_khz = min(max_bandwidth1, max_bandwidth2);
1376 intersected_rule->flags = rule1->flags | rule2->flags;
1379 * In case NL80211_RRF_AUTO_BW requested for both rules
1380 * set AUTO_BW in intersected rule also. Next we will
1381 * calculate BW correctly in handle_channel function.
1382 * In other case remove AUTO_BW flag while we calculate
1383 * maximum bandwidth correctly and auto calculation is
1386 if ((rule1->flags & NL80211_RRF_AUTO_BW) &&
1387 (rule2->flags & NL80211_RRF_AUTO_BW))
1388 intersected_rule->flags |= NL80211_RRF_AUTO_BW;
1390 intersected_rule->flags &= ~NL80211_RRF_AUTO_BW;
1392 freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz;
1393 if (freq_range->max_bandwidth_khz > freq_diff)
1394 freq_range->max_bandwidth_khz = freq_diff;
1396 power_rule->max_eirp = min(power_rule1->max_eirp,
1397 power_rule2->max_eirp);
1398 power_rule->max_antenna_gain = min(power_rule1->max_antenna_gain,
1399 power_rule2->max_antenna_gain);
1401 intersected_rule->dfs_cac_ms = max(rule1->dfs_cac_ms,
1404 if (rule1->has_wmm && rule2->has_wmm) {
1407 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1408 reg_wmm_rules_intersect(&wmm_rule1->client[ac],
1409 &wmm_rule2->client[ac],
1410 &wmm_rule->client[ac]);
1411 reg_wmm_rules_intersect(&wmm_rule1->ap[ac],
1416 intersected_rule->has_wmm = true;
1417 } else if (rule1->has_wmm) {
1418 *wmm_rule = *wmm_rule1;
1419 intersected_rule->has_wmm = true;
1420 } else if (rule2->has_wmm) {
1421 *wmm_rule = *wmm_rule2;
1422 intersected_rule->has_wmm = true;
1424 intersected_rule->has_wmm = false;
1427 if (!is_valid_reg_rule(intersected_rule))
1433 /* check whether old rule contains new rule */
1434 static bool rule_contains(struct ieee80211_reg_rule *r1,
1435 struct ieee80211_reg_rule *r2)
1437 /* for simplicity, currently consider only same flags */
1438 if (r1->flags != r2->flags)
1441 /* verify r1 is more restrictive */
1442 if ((r1->power_rule.max_antenna_gain >
1443 r2->power_rule.max_antenna_gain) ||
1444 r1->power_rule.max_eirp > r2->power_rule.max_eirp)
1447 /* make sure r2's range is contained within r1 */
1448 if (r1->freq_range.start_freq_khz > r2->freq_range.start_freq_khz ||
1449 r1->freq_range.end_freq_khz < r2->freq_range.end_freq_khz)
1452 /* and finally verify that r1.max_bw >= r2.max_bw */
1453 if (r1->freq_range.max_bandwidth_khz <
1454 r2->freq_range.max_bandwidth_khz)
1460 /* add or extend current rules. do nothing if rule is already contained */
1461 static void add_rule(struct ieee80211_reg_rule *rule,
1462 struct ieee80211_reg_rule *reg_rules, u32 *n_rules)
1464 struct ieee80211_reg_rule *tmp_rule;
1467 for (i = 0; i < *n_rules; i++) {
1468 tmp_rule = ®_rules[i];
1469 /* rule is already contained - do nothing */
1470 if (rule_contains(tmp_rule, rule))
1473 /* extend rule if possible */
1474 if (rule_contains(rule, tmp_rule)) {
1475 memcpy(tmp_rule, rule, sizeof(*rule));
1480 memcpy(®_rules[*n_rules], rule, sizeof(*rule));
1485 * regdom_intersect - do the intersection between two regulatory domains
1486 * @rd1: first regulatory domain
1487 * @rd2: second regulatory domain
1489 * Use this function to get the intersection between two regulatory domains.
1490 * Once completed we will mark the alpha2 for the rd as intersected, "98",
1491 * as no one single alpha2 can represent this regulatory domain.
1493 * Returns a pointer to the regulatory domain structure which will hold the
1494 * resulting intersection of rules between rd1 and rd2. We will
1495 * kzalloc() this structure for you.
1497 * Returns: the intersected regdomain
1499 static struct ieee80211_regdomain *
1500 regdom_intersect(const struct ieee80211_regdomain *rd1,
1501 const struct ieee80211_regdomain *rd2)
1505 unsigned int num_rules = 0;
1506 const struct ieee80211_reg_rule *rule1, *rule2;
1507 struct ieee80211_reg_rule intersected_rule;
1508 struct ieee80211_regdomain *rd;
1514 * First we get a count of the rules we'll need, then we actually
1515 * build them. This is to so we can malloc() and free() a
1516 * regdomain once. The reason we use reg_rules_intersect() here
1517 * is it will return -EINVAL if the rule computed makes no sense.
1518 * All rules that do check out OK are valid.
1521 for (x = 0; x < rd1->n_reg_rules; x++) {
1522 rule1 = &rd1->reg_rules[x];
1523 for (y = 0; y < rd2->n_reg_rules; y++) {
1524 rule2 = &rd2->reg_rules[y];
1525 if (!reg_rules_intersect(rd1, rd2, rule1, rule2,
1534 rd = kzalloc(struct_size(rd, reg_rules, num_rules), GFP_KERNEL);
1538 for (x = 0; x < rd1->n_reg_rules; x++) {
1539 rule1 = &rd1->reg_rules[x];
1540 for (y = 0; y < rd2->n_reg_rules; y++) {
1541 rule2 = &rd2->reg_rules[y];
1542 r = reg_rules_intersect(rd1, rd2, rule1, rule2,
1545 * No need to memset here the intersected rule here as
1546 * we're not using the stack anymore
1551 add_rule(&intersected_rule, rd->reg_rules,
1556 rd->alpha2[0] = '9';
1557 rd->alpha2[1] = '8';
1558 rd->dfs_region = reg_intersect_dfs_region(rd1->dfs_region,
1565 * XXX: add support for the rest of enum nl80211_reg_rule_flags, we may
1566 * want to just have the channel structure use these
1568 static u32 map_regdom_flags(u32 rd_flags)
1570 u32 channel_flags = 0;
1571 if (rd_flags & NL80211_RRF_NO_IR_ALL)
1572 channel_flags |= IEEE80211_CHAN_NO_IR;
1573 if (rd_flags & NL80211_RRF_DFS)
1574 channel_flags |= IEEE80211_CHAN_RADAR;
1575 if (rd_flags & NL80211_RRF_NO_OFDM)
1576 channel_flags |= IEEE80211_CHAN_NO_OFDM;
1577 if (rd_flags & NL80211_RRF_NO_OUTDOOR)
1578 channel_flags |= IEEE80211_CHAN_INDOOR_ONLY;
1579 if (rd_flags & NL80211_RRF_IR_CONCURRENT)
1580 channel_flags |= IEEE80211_CHAN_IR_CONCURRENT;
1581 if (rd_flags & NL80211_RRF_NO_HT40MINUS)
1582 channel_flags |= IEEE80211_CHAN_NO_HT40MINUS;
1583 if (rd_flags & NL80211_RRF_NO_HT40PLUS)
1584 channel_flags |= IEEE80211_CHAN_NO_HT40PLUS;
1585 if (rd_flags & NL80211_RRF_NO_80MHZ)
1586 channel_flags |= IEEE80211_CHAN_NO_80MHZ;
1587 if (rd_flags & NL80211_RRF_NO_160MHZ)
1588 channel_flags |= IEEE80211_CHAN_NO_160MHZ;
1589 if (rd_flags & NL80211_RRF_NO_HE)
1590 channel_flags |= IEEE80211_CHAN_NO_HE;
1591 if (rd_flags & NL80211_RRF_NO_320MHZ)
1592 channel_flags |= IEEE80211_CHAN_NO_320MHZ;
1593 if (rd_flags & NL80211_RRF_NO_EHT)
1594 channel_flags |= IEEE80211_CHAN_NO_EHT;
1595 if (rd_flags & NL80211_RRF_DFS_CONCURRENT)
1596 channel_flags |= IEEE80211_CHAN_DFS_CONCURRENT;
1597 if (rd_flags & NL80211_RRF_NO_6GHZ_VLP_CLIENT)
1598 channel_flags |= IEEE80211_CHAN_NO_6GHZ_VLP_CLIENT;
1599 if (rd_flags & NL80211_RRF_NO_6GHZ_AFC_CLIENT)
1600 channel_flags |= IEEE80211_CHAN_NO_6GHZ_AFC_CLIENT;
1601 if (rd_flags & NL80211_RRF_PSD)
1602 channel_flags |= IEEE80211_CHAN_PSD;
1603 return channel_flags;
1606 static const struct ieee80211_reg_rule *
1607 freq_reg_info_regd(u32 center_freq,
1608 const struct ieee80211_regdomain *regd, u32 bw)
1611 bool band_rule_found = false;
1612 bool bw_fits = false;
1615 return ERR_PTR(-EINVAL);
1617 for (i = 0; i < regd->n_reg_rules; i++) {
1618 const struct ieee80211_reg_rule *rr;
1619 const struct ieee80211_freq_range *fr = NULL;
1621 rr = ®d->reg_rules[i];
1622 fr = &rr->freq_range;
1625 * We only need to know if one frequency rule was
1626 * in center_freq's band, that's enough, so let's
1627 * not overwrite it once found
1629 if (!band_rule_found)
1630 band_rule_found = freq_in_rule_band(fr, center_freq);
1632 bw_fits = cfg80211_does_bw_fit_range(fr, center_freq, bw);
1634 if (band_rule_found && bw_fits)
1638 if (!band_rule_found)
1639 return ERR_PTR(-ERANGE);
1641 return ERR_PTR(-EINVAL);
1644 static const struct ieee80211_reg_rule *
1645 __freq_reg_info(struct wiphy *wiphy, u32 center_freq, u32 min_bw)
1647 const struct ieee80211_regdomain *regd = reg_get_regdomain(wiphy);
1648 static const u32 bws[] = {0, 1, 2, 4, 5, 8, 10, 16, 20};
1649 const struct ieee80211_reg_rule *reg_rule = ERR_PTR(-ERANGE);
1650 int i = ARRAY_SIZE(bws) - 1;
1653 for (bw = MHZ_TO_KHZ(bws[i]); bw >= min_bw; bw = MHZ_TO_KHZ(bws[i--])) {
1654 reg_rule = freq_reg_info_regd(center_freq, regd, bw);
1655 if (!IS_ERR(reg_rule))
1662 const struct ieee80211_reg_rule *freq_reg_info(struct wiphy *wiphy,
1665 u32 min_bw = center_freq < MHZ_TO_KHZ(1000) ? 1 : 20;
1667 return __freq_reg_info(wiphy, center_freq, MHZ_TO_KHZ(min_bw));
1669 EXPORT_SYMBOL(freq_reg_info);
1671 const char *reg_initiator_name(enum nl80211_reg_initiator initiator)
1673 switch (initiator) {
1674 case NL80211_REGDOM_SET_BY_CORE:
1676 case NL80211_REGDOM_SET_BY_USER:
1678 case NL80211_REGDOM_SET_BY_DRIVER:
1680 case NL80211_REGDOM_SET_BY_COUNTRY_IE:
1681 return "country element";
1687 EXPORT_SYMBOL(reg_initiator_name);
1689 static uint32_t reg_rule_to_chan_bw_flags(const struct ieee80211_regdomain *regd,
1690 const struct ieee80211_reg_rule *reg_rule,
1691 const struct ieee80211_channel *chan)
1693 const struct ieee80211_freq_range *freq_range = NULL;
1694 u32 max_bandwidth_khz, center_freq_khz, bw_flags = 0;
1695 bool is_s1g = chan->band == NL80211_BAND_S1GHZ;
1697 freq_range = ®_rule->freq_range;
1699 max_bandwidth_khz = freq_range->max_bandwidth_khz;
1700 center_freq_khz = ieee80211_channel_to_khz(chan);
1701 /* Check if auto calculation requested */
1702 if (reg_rule->flags & NL80211_RRF_AUTO_BW)
1703 max_bandwidth_khz = reg_get_max_bandwidth(regd, reg_rule);
1705 /* If we get a reg_rule we can assume that at least 5Mhz fit */
1706 if (!cfg80211_does_bw_fit_range(freq_range,
1709 bw_flags |= IEEE80211_CHAN_NO_10MHZ;
1710 if (!cfg80211_does_bw_fit_range(freq_range,
1713 bw_flags |= IEEE80211_CHAN_NO_20MHZ;
1716 /* S1G is strict about non overlapping channels. We can
1717 * calculate which bandwidth is allowed per channel by finding
1718 * the largest bandwidth which cleanly divides the freq_range.
1721 int ch_bw = max_bandwidth_khz;
1724 edge_offset = (center_freq_khz - ch_bw / 2) -
1725 freq_range->start_freq_khz;
1726 if (edge_offset % ch_bw == 0) {
1727 switch (KHZ_TO_MHZ(ch_bw)) {
1729 bw_flags |= IEEE80211_CHAN_1MHZ;
1732 bw_flags |= IEEE80211_CHAN_2MHZ;
1735 bw_flags |= IEEE80211_CHAN_4MHZ;
1738 bw_flags |= IEEE80211_CHAN_8MHZ;
1741 bw_flags |= IEEE80211_CHAN_16MHZ;
1744 /* If we got here, no bandwidths fit on
1745 * this frequency, ie. band edge.
1747 bw_flags |= IEEE80211_CHAN_DISABLED;
1755 if (max_bandwidth_khz < MHZ_TO_KHZ(10))
1756 bw_flags |= IEEE80211_CHAN_NO_10MHZ;
1757 if (max_bandwidth_khz < MHZ_TO_KHZ(20))
1758 bw_flags |= IEEE80211_CHAN_NO_20MHZ;
1759 if (max_bandwidth_khz < MHZ_TO_KHZ(40))
1760 bw_flags |= IEEE80211_CHAN_NO_HT40;
1761 if (max_bandwidth_khz < MHZ_TO_KHZ(80))
1762 bw_flags |= IEEE80211_CHAN_NO_80MHZ;
1763 if (max_bandwidth_khz < MHZ_TO_KHZ(160))
1764 bw_flags |= IEEE80211_CHAN_NO_160MHZ;
1765 if (max_bandwidth_khz < MHZ_TO_KHZ(320))
1766 bw_flags |= IEEE80211_CHAN_NO_320MHZ;
1771 static void handle_channel_single_rule(struct wiphy *wiphy,
1772 enum nl80211_reg_initiator initiator,
1773 struct ieee80211_channel *chan,
1775 struct regulatory_request *lr,
1776 struct wiphy *request_wiphy,
1777 const struct ieee80211_reg_rule *reg_rule)
1780 const struct ieee80211_power_rule *power_rule = NULL;
1781 const struct ieee80211_regdomain *regd;
1783 regd = reg_get_regdomain(wiphy);
1785 power_rule = ®_rule->power_rule;
1786 bw_flags = reg_rule_to_chan_bw_flags(regd, reg_rule, chan);
1788 if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER &&
1789 request_wiphy && request_wiphy == wiphy &&
1790 request_wiphy->regulatory_flags & REGULATORY_STRICT_REG) {
1792 * This guarantees the driver's requested regulatory domain
1793 * will always be used as a base for further regulatory
1796 chan->flags = chan->orig_flags =
1797 map_regdom_flags(reg_rule->flags) | bw_flags;
1798 chan->max_antenna_gain = chan->orig_mag =
1799 (int) MBI_TO_DBI(power_rule->max_antenna_gain);
1800 chan->max_reg_power = chan->max_power = chan->orig_mpwr =
1801 (int) MBM_TO_DBM(power_rule->max_eirp);
1803 if (chan->flags & IEEE80211_CHAN_RADAR) {
1804 chan->dfs_cac_ms = IEEE80211_DFS_MIN_CAC_TIME_MS;
1805 if (reg_rule->dfs_cac_ms)
1806 chan->dfs_cac_ms = reg_rule->dfs_cac_ms;
1809 if (chan->flags & IEEE80211_CHAN_PSD)
1810 chan->psd = reg_rule->psd;
1815 chan->dfs_state = NL80211_DFS_USABLE;
1816 chan->dfs_state_entered = jiffies;
1818 chan->beacon_found = false;
1819 chan->flags = flags | bw_flags | map_regdom_flags(reg_rule->flags);
1820 chan->max_antenna_gain =
1821 min_t(int, chan->orig_mag,
1822 MBI_TO_DBI(power_rule->max_antenna_gain));
1823 chan->max_reg_power = (int) MBM_TO_DBM(power_rule->max_eirp);
1825 if (chan->flags & IEEE80211_CHAN_RADAR) {
1826 if (reg_rule->dfs_cac_ms)
1827 chan->dfs_cac_ms = reg_rule->dfs_cac_ms;
1829 chan->dfs_cac_ms = IEEE80211_DFS_MIN_CAC_TIME_MS;
1832 if (chan->flags & IEEE80211_CHAN_PSD)
1833 chan->psd = reg_rule->psd;
1835 if (chan->orig_mpwr) {
1837 * Devices that use REGULATORY_COUNTRY_IE_FOLLOW_POWER
1838 * will always follow the passed country IE power settings.
1840 if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE &&
1841 wiphy->regulatory_flags & REGULATORY_COUNTRY_IE_FOLLOW_POWER)
1842 chan->max_power = chan->max_reg_power;
1844 chan->max_power = min(chan->orig_mpwr,
1845 chan->max_reg_power);
1847 chan->max_power = chan->max_reg_power;
1850 static void handle_channel_adjacent_rules(struct wiphy *wiphy,
1851 enum nl80211_reg_initiator initiator,
1852 struct ieee80211_channel *chan,
1854 struct regulatory_request *lr,
1855 struct wiphy *request_wiphy,
1856 const struct ieee80211_reg_rule *rrule1,
1857 const struct ieee80211_reg_rule *rrule2,
1858 struct ieee80211_freq_range *comb_range)
1862 const struct ieee80211_power_rule *power_rule1 = NULL;
1863 const struct ieee80211_power_rule *power_rule2 = NULL;
1864 const struct ieee80211_regdomain *regd;
1866 regd = reg_get_regdomain(wiphy);
1868 power_rule1 = &rrule1->power_rule;
1869 power_rule2 = &rrule2->power_rule;
1870 bw_flags1 = reg_rule_to_chan_bw_flags(regd, rrule1, chan);
1871 bw_flags2 = reg_rule_to_chan_bw_flags(regd, rrule2, chan);
1873 if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER &&
1874 request_wiphy && request_wiphy == wiphy &&
1875 request_wiphy->regulatory_flags & REGULATORY_STRICT_REG) {
1876 /* This guarantees the driver's requested regulatory domain
1877 * will always be used as a base for further regulatory
1881 map_regdom_flags(rrule1->flags) |
1882 map_regdom_flags(rrule2->flags) |
1885 chan->orig_flags = chan->flags;
1886 chan->max_antenna_gain =
1887 min_t(int, MBI_TO_DBI(power_rule1->max_antenna_gain),
1888 MBI_TO_DBI(power_rule2->max_antenna_gain));
1889 chan->orig_mag = chan->max_antenna_gain;
1890 chan->max_reg_power =
1891 min_t(int, MBM_TO_DBM(power_rule1->max_eirp),
1892 MBM_TO_DBM(power_rule2->max_eirp));
1893 chan->max_power = chan->max_reg_power;
1894 chan->orig_mpwr = chan->max_reg_power;
1896 if (chan->flags & IEEE80211_CHAN_RADAR) {
1897 chan->dfs_cac_ms = IEEE80211_DFS_MIN_CAC_TIME_MS;
1898 if (rrule1->dfs_cac_ms || rrule2->dfs_cac_ms)
1899 chan->dfs_cac_ms = max_t(unsigned int,
1901 rrule2->dfs_cac_ms);
1904 if ((rrule1->flags & NL80211_RRF_PSD) &&
1905 (rrule2->flags & NL80211_RRF_PSD))
1906 chan->psd = min_t(s8, rrule1->psd, rrule2->psd);
1908 chan->flags &= ~NL80211_RRF_PSD;
1913 chan->dfs_state = NL80211_DFS_USABLE;
1914 chan->dfs_state_entered = jiffies;
1916 chan->beacon_found = false;
1917 chan->flags = flags | bw_flags1 | bw_flags2 |
1918 map_regdom_flags(rrule1->flags) |
1919 map_regdom_flags(rrule2->flags);
1921 /* reg_rule_to_chan_bw_flags may forbids 10 and forbids 20 MHz
1922 * (otherwise no adj. rule case), recheck therefore
1924 if (cfg80211_does_bw_fit_range(comb_range,
1925 ieee80211_channel_to_khz(chan),
1927 chan->flags &= ~IEEE80211_CHAN_NO_10MHZ;
1928 if (cfg80211_does_bw_fit_range(comb_range,
1929 ieee80211_channel_to_khz(chan),
1931 chan->flags &= ~IEEE80211_CHAN_NO_20MHZ;
1933 chan->max_antenna_gain =
1934 min_t(int, chan->orig_mag,
1936 MBI_TO_DBI(power_rule1->max_antenna_gain),
1937 MBI_TO_DBI(power_rule2->max_antenna_gain)));
1938 chan->max_reg_power = min_t(int,
1939 MBM_TO_DBM(power_rule1->max_eirp),
1940 MBM_TO_DBM(power_rule2->max_eirp));
1942 if (chan->flags & IEEE80211_CHAN_RADAR) {
1943 if (rrule1->dfs_cac_ms || rrule2->dfs_cac_ms)
1944 chan->dfs_cac_ms = max_t(unsigned int,
1946 rrule2->dfs_cac_ms);
1948 chan->dfs_cac_ms = IEEE80211_DFS_MIN_CAC_TIME_MS;
1951 if (chan->orig_mpwr) {
1952 /* Devices that use REGULATORY_COUNTRY_IE_FOLLOW_POWER
1953 * will always follow the passed country IE power settings.
1955 if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE &&
1956 wiphy->regulatory_flags & REGULATORY_COUNTRY_IE_FOLLOW_POWER)
1957 chan->max_power = chan->max_reg_power;
1959 chan->max_power = min(chan->orig_mpwr,
1960 chan->max_reg_power);
1962 chan->max_power = chan->max_reg_power;
1966 /* Note that right now we assume the desired channel bandwidth
1967 * is always 20 MHz for each individual channel (HT40 uses 20 MHz
1968 * per channel, the primary and the extension channel).
1970 static void handle_channel(struct wiphy *wiphy,
1971 enum nl80211_reg_initiator initiator,
1972 struct ieee80211_channel *chan)
1974 const u32 orig_chan_freq = ieee80211_channel_to_khz(chan);
1975 struct regulatory_request *lr = get_last_request();
1976 struct wiphy *request_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx);
1977 const struct ieee80211_reg_rule *rrule = NULL;
1978 const struct ieee80211_reg_rule *rrule1 = NULL;
1979 const struct ieee80211_reg_rule *rrule2 = NULL;
1981 u32 flags = chan->orig_flags;
1983 rrule = freq_reg_info(wiphy, orig_chan_freq);
1984 if (IS_ERR(rrule)) {
1985 /* check for adjacent match, therefore get rules for
1986 * chan - 20 MHz and chan + 20 MHz and test
1987 * if reg rules are adjacent
1989 rrule1 = freq_reg_info(wiphy,
1990 orig_chan_freq - MHZ_TO_KHZ(20));
1991 rrule2 = freq_reg_info(wiphy,
1992 orig_chan_freq + MHZ_TO_KHZ(20));
1993 if (!IS_ERR(rrule1) && !IS_ERR(rrule2)) {
1994 struct ieee80211_freq_range comb_range;
1996 if (rrule1->freq_range.end_freq_khz !=
1997 rrule2->freq_range.start_freq_khz)
2000 comb_range.start_freq_khz =
2001 rrule1->freq_range.start_freq_khz;
2002 comb_range.end_freq_khz =
2003 rrule2->freq_range.end_freq_khz;
2004 comb_range.max_bandwidth_khz =
2006 rrule1->freq_range.max_bandwidth_khz,
2007 rrule2->freq_range.max_bandwidth_khz);
2009 if (!cfg80211_does_bw_fit_range(&comb_range,
2014 handle_channel_adjacent_rules(wiphy, initiator, chan,
2015 flags, lr, request_wiphy,
2022 /* We will disable all channels that do not match our
2023 * received regulatory rule unless the hint is coming
2024 * from a Country IE and the Country IE had no information
2025 * about a band. The IEEE 802.11 spec allows for an AP
2026 * to send only a subset of the regulatory rules allowed,
2027 * so an AP in the US that only supports 2.4 GHz may only send
2028 * a country IE with information for the 2.4 GHz band
2029 * while 5 GHz is still supported.
2031 if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE &&
2032 PTR_ERR(rrule) == -ERANGE)
2035 if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER &&
2036 request_wiphy && request_wiphy == wiphy &&
2037 request_wiphy->regulatory_flags & REGULATORY_STRICT_REG) {
2038 pr_debug("Disabling freq %d.%03d MHz for good\n",
2039 chan->center_freq, chan->freq_offset);
2040 chan->orig_flags |= IEEE80211_CHAN_DISABLED;
2041 chan->flags = chan->orig_flags;
2043 pr_debug("Disabling freq %d.%03d MHz\n",
2044 chan->center_freq, chan->freq_offset);
2045 chan->flags |= IEEE80211_CHAN_DISABLED;
2050 handle_channel_single_rule(wiphy, initiator, chan, flags, lr,
2051 request_wiphy, rrule);
2054 static void handle_band(struct wiphy *wiphy,
2055 enum nl80211_reg_initiator initiator,
2056 struct ieee80211_supported_band *sband)
2063 for (i = 0; i < sband->n_channels; i++)
2064 handle_channel(wiphy, initiator, &sband->channels[i]);
2067 static bool reg_request_cell_base(struct regulatory_request *request)
2069 if (request->initiator != NL80211_REGDOM_SET_BY_USER)
2071 return request->user_reg_hint_type == NL80211_USER_REG_HINT_CELL_BASE;
2074 bool reg_last_request_cell_base(void)
2076 return reg_request_cell_base(get_last_request());
2079 #ifdef CONFIG_CFG80211_REG_CELLULAR_HINTS
2080 /* Core specific check */
2081 static enum reg_request_treatment
2082 reg_ignore_cell_hint(struct regulatory_request *pending_request)
2084 struct regulatory_request *lr = get_last_request();
2086 if (!reg_num_devs_support_basehint)
2087 return REG_REQ_IGNORE;
2089 if (reg_request_cell_base(lr) &&
2090 !regdom_changes(pending_request->alpha2))
2091 return REG_REQ_ALREADY_SET;
2096 /* Device specific check */
2097 static bool reg_dev_ignore_cell_hint(struct wiphy *wiphy)
2099 return !(wiphy->features & NL80211_FEATURE_CELL_BASE_REG_HINTS);
2102 static enum reg_request_treatment
2103 reg_ignore_cell_hint(struct regulatory_request *pending_request)
2105 return REG_REQ_IGNORE;
2108 static bool reg_dev_ignore_cell_hint(struct wiphy *wiphy)
2114 static bool wiphy_strict_alpha2_regd(struct wiphy *wiphy)
2116 if (wiphy->regulatory_flags & REGULATORY_STRICT_REG &&
2117 !(wiphy->regulatory_flags & REGULATORY_CUSTOM_REG))
2122 static bool ignore_reg_update(struct wiphy *wiphy,
2123 enum nl80211_reg_initiator initiator)
2125 struct regulatory_request *lr = get_last_request();
2127 if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED)
2131 pr_debug("Ignoring regulatory request set by %s since last_request is not set\n",
2132 reg_initiator_name(initiator));
2136 if (initiator == NL80211_REGDOM_SET_BY_CORE &&
2137 wiphy->regulatory_flags & REGULATORY_CUSTOM_REG) {
2138 pr_debug("Ignoring regulatory request set by %s since the driver uses its own custom regulatory domain\n",
2139 reg_initiator_name(initiator));
2144 * wiphy->regd will be set once the device has its own
2145 * desired regulatory domain set
2147 if (wiphy_strict_alpha2_regd(wiphy) && !wiphy->regd &&
2148 initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE &&
2149 !is_world_regdom(lr->alpha2)) {
2150 pr_debug("Ignoring regulatory request set by %s since the driver requires its own regulatory domain to be set first\n",
2151 reg_initiator_name(initiator));
2155 if (reg_request_cell_base(lr))
2156 return reg_dev_ignore_cell_hint(wiphy);
2161 static bool reg_is_world_roaming(struct wiphy *wiphy)
2163 const struct ieee80211_regdomain *cr = get_cfg80211_regdom();
2164 const struct ieee80211_regdomain *wr = get_wiphy_regdom(wiphy);
2165 struct regulatory_request *lr = get_last_request();
2167 if (is_world_regdom(cr->alpha2) || (wr && is_world_regdom(wr->alpha2)))
2170 if (lr && lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE &&
2171 wiphy->regulatory_flags & REGULATORY_CUSTOM_REG)
2177 static void reg_call_notifier(struct wiphy *wiphy,
2178 struct regulatory_request *request)
2180 if (wiphy->reg_notifier)
2181 wiphy->reg_notifier(wiphy, request);
2184 static void handle_reg_beacon(struct wiphy *wiphy, unsigned int chan_idx,
2185 struct reg_beacon *reg_beacon)
2187 struct ieee80211_supported_band *sband;
2188 struct ieee80211_channel *chan;
2189 bool channel_changed = false;
2190 struct ieee80211_channel chan_before;
2191 struct regulatory_request *lr = get_last_request();
2193 sband = wiphy->bands[reg_beacon->chan.band];
2194 chan = &sband->channels[chan_idx];
2196 if (likely(!ieee80211_channel_equal(chan, ®_beacon->chan)))
2199 if (chan->beacon_found)
2202 chan->beacon_found = true;
2204 if (!reg_is_world_roaming(wiphy))
2207 if (wiphy->regulatory_flags & REGULATORY_DISABLE_BEACON_HINTS)
2210 chan_before = *chan;
2212 if (chan->flags & IEEE80211_CHAN_NO_IR) {
2213 chan->flags &= ~IEEE80211_CHAN_NO_IR;
2214 channel_changed = true;
2217 if (channel_changed) {
2218 nl80211_send_beacon_hint_event(wiphy, &chan_before, chan);
2219 if (wiphy->flags & WIPHY_FLAG_CHANNEL_CHANGE_ON_BEACON)
2220 reg_call_notifier(wiphy, lr);
2225 * Called when a scan on a wiphy finds a beacon on
2228 static void wiphy_update_new_beacon(struct wiphy *wiphy,
2229 struct reg_beacon *reg_beacon)
2232 struct ieee80211_supported_band *sband;
2234 if (!wiphy->bands[reg_beacon->chan.band])
2237 sband = wiphy->bands[reg_beacon->chan.band];
2239 for (i = 0; i < sband->n_channels; i++)
2240 handle_reg_beacon(wiphy, i, reg_beacon);
2244 * Called upon reg changes or a new wiphy is added
2246 static void wiphy_update_beacon_reg(struct wiphy *wiphy)
2249 struct ieee80211_supported_band *sband;
2250 struct reg_beacon *reg_beacon;
2252 list_for_each_entry(reg_beacon, ®_beacon_list, list) {
2253 if (!wiphy->bands[reg_beacon->chan.band])
2255 sband = wiphy->bands[reg_beacon->chan.band];
2256 for (i = 0; i < sband->n_channels; i++)
2257 handle_reg_beacon(wiphy, i, reg_beacon);
2261 /* Reap the advantages of previously found beacons */
2262 static void reg_process_beacons(struct wiphy *wiphy)
2265 * Means we are just firing up cfg80211, so no beacons would
2266 * have been processed yet.
2270 wiphy_update_beacon_reg(wiphy);
2273 static bool is_ht40_allowed(struct ieee80211_channel *chan)
2277 if (chan->flags & IEEE80211_CHAN_DISABLED)
2279 /* This would happen when regulatory rules disallow HT40 completely */
2280 if ((chan->flags & IEEE80211_CHAN_NO_HT40) == IEEE80211_CHAN_NO_HT40)
2285 static void reg_process_ht_flags_channel(struct wiphy *wiphy,
2286 struct ieee80211_channel *channel)
2288 struct ieee80211_supported_band *sband = wiphy->bands[channel->band];
2289 struct ieee80211_channel *channel_before = NULL, *channel_after = NULL;
2290 const struct ieee80211_regdomain *regd;
2294 if (!is_ht40_allowed(channel)) {
2295 channel->flags |= IEEE80211_CHAN_NO_HT40;
2300 * We need to ensure the extension channels exist to
2301 * be able to use HT40- or HT40+, this finds them (or not)
2303 for (i = 0; i < sband->n_channels; i++) {
2304 struct ieee80211_channel *c = &sband->channels[i];
2306 if (c->center_freq == (channel->center_freq - 20))
2308 if (c->center_freq == (channel->center_freq + 20))
2313 regd = get_wiphy_regdom(wiphy);
2315 const struct ieee80211_reg_rule *reg_rule =
2316 freq_reg_info_regd(MHZ_TO_KHZ(channel->center_freq),
2317 regd, MHZ_TO_KHZ(20));
2319 if (!IS_ERR(reg_rule))
2320 flags = reg_rule->flags;
2324 * Please note that this assumes target bandwidth is 20 MHz,
2325 * if that ever changes we also need to change the below logic
2326 * to include that as well.
2328 if (!is_ht40_allowed(channel_before) ||
2329 flags & NL80211_RRF_NO_HT40MINUS)
2330 channel->flags |= IEEE80211_CHAN_NO_HT40MINUS;
2332 channel->flags &= ~IEEE80211_CHAN_NO_HT40MINUS;
2334 if (!is_ht40_allowed(channel_after) ||
2335 flags & NL80211_RRF_NO_HT40PLUS)
2336 channel->flags |= IEEE80211_CHAN_NO_HT40PLUS;
2338 channel->flags &= ~IEEE80211_CHAN_NO_HT40PLUS;
2341 static void reg_process_ht_flags_band(struct wiphy *wiphy,
2342 struct ieee80211_supported_band *sband)
2349 for (i = 0; i < sband->n_channels; i++)
2350 reg_process_ht_flags_channel(wiphy, &sband->channels[i]);
2353 static void reg_process_ht_flags(struct wiphy *wiphy)
2355 enum nl80211_band band;
2360 for (band = 0; band < NUM_NL80211_BANDS; band++)
2361 reg_process_ht_flags_band(wiphy, wiphy->bands[band]);
2364 static bool reg_wdev_chan_valid(struct wiphy *wiphy, struct wireless_dev *wdev)
2366 struct cfg80211_chan_def chandef = {};
2367 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
2368 enum nl80211_iftype iftype;
2372 iftype = wdev->iftype;
2374 /* make sure the interface is active */
2375 if (!wdev->netdev || !netif_running(wdev->netdev))
2378 for (link = 0; link < ARRAY_SIZE(wdev->links); link++) {
2379 struct ieee80211_channel *chan;
2381 if (!wdev->valid_links && link > 0)
2383 if (wdev->valid_links && !(wdev->valid_links & BIT(link)))
2386 case NL80211_IFTYPE_AP:
2387 case NL80211_IFTYPE_P2P_GO:
2388 if (!wdev->links[link].ap.beacon_interval)
2390 chandef = wdev->links[link].ap.chandef;
2392 case NL80211_IFTYPE_MESH_POINT:
2393 if (!wdev->u.mesh.beacon_interval)
2395 chandef = wdev->u.mesh.chandef;
2397 case NL80211_IFTYPE_ADHOC:
2398 if (!wdev->u.ibss.ssid_len)
2400 chandef = wdev->u.ibss.chandef;
2402 case NL80211_IFTYPE_STATION:
2403 case NL80211_IFTYPE_P2P_CLIENT:
2404 /* Maybe we could consider disabling that link only? */
2405 if (!wdev->links[link].client.current_bss)
2408 chan = wdev->links[link].client.current_bss->pub.channel;
2412 if (!rdev->ops->get_channel ||
2413 rdev_get_channel(rdev, wdev, link, &chandef))
2414 cfg80211_chandef_create(&chandef, chan,
2415 NL80211_CHAN_NO_HT);
2417 case NL80211_IFTYPE_MONITOR:
2418 case NL80211_IFTYPE_AP_VLAN:
2419 case NL80211_IFTYPE_P2P_DEVICE:
2420 /* no enforcement required */
2422 case NL80211_IFTYPE_OCB:
2423 if (!wdev->u.ocb.chandef.chan)
2425 chandef = wdev->u.ocb.chandef;
2427 case NL80211_IFTYPE_NAN:
2428 /* we have no info, but NAN is also pretty universal */
2431 /* others not implemented for now */
2437 case NL80211_IFTYPE_AP:
2438 case NL80211_IFTYPE_P2P_GO:
2439 case NL80211_IFTYPE_ADHOC:
2440 case NL80211_IFTYPE_MESH_POINT:
2441 ret = cfg80211_reg_can_beacon_relax(wiphy, &chandef,
2446 case NL80211_IFTYPE_STATION:
2447 case NL80211_IFTYPE_P2P_CLIENT:
2448 ret = cfg80211_chandef_usable(wiphy, &chandef,
2449 IEEE80211_CHAN_DISABLED);
2461 static void reg_leave_invalid_chans(struct wiphy *wiphy)
2463 struct wireless_dev *wdev;
2464 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
2467 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list)
2468 if (!reg_wdev_chan_valid(wiphy, wdev))
2469 cfg80211_leave(rdev, wdev);
2470 wiphy_unlock(wiphy);
2473 static void reg_check_chans_work(struct work_struct *work)
2475 struct cfg80211_registered_device *rdev;
2477 pr_debug("Verifying active interfaces after reg change\n");
2481 reg_leave_invalid_chans(&rdev->wiphy);
2486 void reg_check_channels(void)
2489 * Give usermode a chance to do something nicer (move to another
2490 * channel, orderly disconnection), before forcing a disconnection.
2492 mod_delayed_work(system_power_efficient_wq,
2494 msecs_to_jiffies(REG_ENFORCE_GRACE_MS));
2497 static void wiphy_update_regulatory(struct wiphy *wiphy,
2498 enum nl80211_reg_initiator initiator)
2500 enum nl80211_band band;
2501 struct regulatory_request *lr = get_last_request();
2503 if (ignore_reg_update(wiphy, initiator)) {
2505 * Regulatory updates set by CORE are ignored for custom
2506 * regulatory cards. Let us notify the changes to the driver,
2507 * as some drivers used this to restore its orig_* reg domain.
2509 if (initiator == NL80211_REGDOM_SET_BY_CORE &&
2510 wiphy->regulatory_flags & REGULATORY_CUSTOM_REG &&
2511 !(wiphy->regulatory_flags &
2512 REGULATORY_WIPHY_SELF_MANAGED))
2513 reg_call_notifier(wiphy, lr);
2517 lr->dfs_region = get_cfg80211_regdom()->dfs_region;
2519 for (band = 0; band < NUM_NL80211_BANDS; band++)
2520 handle_band(wiphy, initiator, wiphy->bands[band]);
2522 reg_process_beacons(wiphy);
2523 reg_process_ht_flags(wiphy);
2524 reg_call_notifier(wiphy, lr);
2527 static void update_all_wiphy_regulatory(enum nl80211_reg_initiator initiator)
2529 struct cfg80211_registered_device *rdev;
2530 struct wiphy *wiphy;
2534 for_each_rdev(rdev) {
2535 wiphy = &rdev->wiphy;
2536 wiphy_update_regulatory(wiphy, initiator);
2539 reg_check_channels();
2542 static void handle_channel_custom(struct wiphy *wiphy,
2543 struct ieee80211_channel *chan,
2544 const struct ieee80211_regdomain *regd,
2548 const struct ieee80211_reg_rule *reg_rule = NULL;
2549 const struct ieee80211_power_rule *power_rule = NULL;
2550 u32 bw, center_freq_khz;
2552 center_freq_khz = ieee80211_channel_to_khz(chan);
2553 for (bw = MHZ_TO_KHZ(20); bw >= min_bw; bw = bw / 2) {
2554 reg_rule = freq_reg_info_regd(center_freq_khz, regd, bw);
2555 if (!IS_ERR(reg_rule))
2559 if (IS_ERR_OR_NULL(reg_rule)) {
2560 pr_debug("Disabling freq %d.%03d MHz as custom regd has no rule that fits it\n",
2561 chan->center_freq, chan->freq_offset);
2562 if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) {
2563 chan->flags |= IEEE80211_CHAN_DISABLED;
2565 chan->orig_flags |= IEEE80211_CHAN_DISABLED;
2566 chan->flags = chan->orig_flags;
2571 power_rule = ®_rule->power_rule;
2572 bw_flags = reg_rule_to_chan_bw_flags(regd, reg_rule, chan);
2574 chan->dfs_state_entered = jiffies;
2575 chan->dfs_state = NL80211_DFS_USABLE;
2577 chan->beacon_found = false;
2579 if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED)
2580 chan->flags = chan->orig_flags | bw_flags |
2581 map_regdom_flags(reg_rule->flags);
2583 chan->flags |= map_regdom_flags(reg_rule->flags) | bw_flags;
2585 chan->max_antenna_gain = (int) MBI_TO_DBI(power_rule->max_antenna_gain);
2586 chan->max_reg_power = chan->max_power =
2587 (int) MBM_TO_DBM(power_rule->max_eirp);
2589 if (chan->flags & IEEE80211_CHAN_RADAR) {
2590 if (reg_rule->dfs_cac_ms)
2591 chan->dfs_cac_ms = reg_rule->dfs_cac_ms;
2593 chan->dfs_cac_ms = IEEE80211_DFS_MIN_CAC_TIME_MS;
2596 if (chan->flags & IEEE80211_CHAN_PSD)
2597 chan->psd = reg_rule->psd;
2599 chan->max_power = chan->max_reg_power;
2602 static void handle_band_custom(struct wiphy *wiphy,
2603 struct ieee80211_supported_band *sband,
2604 const struct ieee80211_regdomain *regd)
2612 * We currently assume that you always want at least 20 MHz,
2613 * otherwise channel 12 might get enabled if this rule is
2614 * compatible to US, which permits 2402 - 2472 MHz.
2616 for (i = 0; i < sband->n_channels; i++)
2617 handle_channel_custom(wiphy, &sband->channels[i], regd,
2621 /* Used by drivers prior to wiphy registration */
2622 void wiphy_apply_custom_regulatory(struct wiphy *wiphy,
2623 const struct ieee80211_regdomain *regd)
2625 const struct ieee80211_regdomain *new_regd, *tmp;
2626 enum nl80211_band band;
2627 unsigned int bands_set = 0;
2629 WARN(!(wiphy->regulatory_flags & REGULATORY_CUSTOM_REG),
2630 "wiphy should have REGULATORY_CUSTOM_REG\n");
2631 wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG;
2633 for (band = 0; band < NUM_NL80211_BANDS; band++) {
2634 if (!wiphy->bands[band])
2636 handle_band_custom(wiphy, wiphy->bands[band], regd);
2641 * no point in calling this if it won't have any effect
2642 * on your device's supported bands.
2644 WARN_ON(!bands_set);
2645 new_regd = reg_copy_regd(regd);
2646 if (IS_ERR(new_regd))
2652 tmp = get_wiphy_regdom(wiphy);
2653 rcu_assign_pointer(wiphy->regd, new_regd);
2654 rcu_free_regdom(tmp);
2656 wiphy_unlock(wiphy);
2659 EXPORT_SYMBOL(wiphy_apply_custom_regulatory);
2661 static void reg_set_request_processed(void)
2663 bool need_more_processing = false;
2664 struct regulatory_request *lr = get_last_request();
2666 lr->processed = true;
2668 spin_lock(®_requests_lock);
2669 if (!list_empty(®_requests_list))
2670 need_more_processing = true;
2671 spin_unlock(®_requests_lock);
2673 cancel_crda_timeout();
2675 if (need_more_processing)
2676 schedule_work(®_work);
2680 * reg_process_hint_core - process core regulatory requests
2681 * @core_request: a pending core regulatory request
2683 * The wireless subsystem can use this function to process
2684 * a regulatory request issued by the regulatory core.
2686 * Returns: %REG_REQ_OK or %REG_REQ_IGNORE, indicating if the
2687 * hint was processed or ignored
2689 static enum reg_request_treatment
2690 reg_process_hint_core(struct regulatory_request *core_request)
2692 if (reg_query_database(core_request)) {
2693 core_request->intersect = false;
2694 core_request->processed = false;
2695 reg_update_last_request(core_request);
2699 return REG_REQ_IGNORE;
2702 static enum reg_request_treatment
2703 __reg_process_hint_user(struct regulatory_request *user_request)
2705 struct regulatory_request *lr = get_last_request();
2707 if (reg_request_cell_base(user_request))
2708 return reg_ignore_cell_hint(user_request);
2710 if (reg_request_cell_base(lr))
2711 return REG_REQ_IGNORE;
2713 if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE)
2714 return REG_REQ_INTERSECT;
2716 * If the user knows better the user should set the regdom
2717 * to their country before the IE is picked up
2719 if (lr->initiator == NL80211_REGDOM_SET_BY_USER &&
2721 return REG_REQ_IGNORE;
2723 * Process user requests only after previous user/driver/core
2724 * requests have been processed
2726 if ((lr->initiator == NL80211_REGDOM_SET_BY_CORE ||
2727 lr->initiator == NL80211_REGDOM_SET_BY_DRIVER ||
2728 lr->initiator == NL80211_REGDOM_SET_BY_USER) &&
2729 regdom_changes(lr->alpha2))
2730 return REG_REQ_IGNORE;
2732 if (!regdom_changes(user_request->alpha2))
2733 return REG_REQ_ALREADY_SET;
2739 * reg_process_hint_user - process user regulatory requests
2740 * @user_request: a pending user regulatory request
2742 * The wireless subsystem can use this function to process
2743 * a regulatory request initiated by userspace.
2745 * Returns: %REG_REQ_OK or %REG_REQ_IGNORE, indicating if the
2746 * hint was processed or ignored
2748 static enum reg_request_treatment
2749 reg_process_hint_user(struct regulatory_request *user_request)
2751 enum reg_request_treatment treatment;
2753 treatment = __reg_process_hint_user(user_request);
2754 if (treatment == REG_REQ_IGNORE ||
2755 treatment == REG_REQ_ALREADY_SET)
2756 return REG_REQ_IGNORE;
2758 user_request->intersect = treatment == REG_REQ_INTERSECT;
2759 user_request->processed = false;
2761 if (reg_query_database(user_request)) {
2762 reg_update_last_request(user_request);
2763 user_alpha2[0] = user_request->alpha2[0];
2764 user_alpha2[1] = user_request->alpha2[1];
2768 return REG_REQ_IGNORE;
2771 static enum reg_request_treatment
2772 __reg_process_hint_driver(struct regulatory_request *driver_request)
2774 struct regulatory_request *lr = get_last_request();
2776 if (lr->initiator == NL80211_REGDOM_SET_BY_CORE) {
2777 if (regdom_changes(driver_request->alpha2))
2779 return REG_REQ_ALREADY_SET;
2783 * This would happen if you unplug and plug your card
2784 * back in or if you add a new device for which the previously
2785 * loaded card also agrees on the regulatory domain.
2787 if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER &&
2788 !regdom_changes(driver_request->alpha2))
2789 return REG_REQ_ALREADY_SET;
2791 return REG_REQ_INTERSECT;
2795 * reg_process_hint_driver - process driver regulatory requests
2796 * @wiphy: the wireless device for the regulatory request
2797 * @driver_request: a pending driver regulatory request
2799 * The wireless subsystem can use this function to process
2800 * a regulatory request issued by an 802.11 driver.
2802 * Returns: one of the different reg request treatment values.
2804 static enum reg_request_treatment
2805 reg_process_hint_driver(struct wiphy *wiphy,
2806 struct regulatory_request *driver_request)
2808 const struct ieee80211_regdomain *regd, *tmp;
2809 enum reg_request_treatment treatment;
2811 treatment = __reg_process_hint_driver(driver_request);
2813 switch (treatment) {
2816 case REG_REQ_IGNORE:
2817 return REG_REQ_IGNORE;
2818 case REG_REQ_INTERSECT:
2819 case REG_REQ_ALREADY_SET:
2820 regd = reg_copy_regd(get_cfg80211_regdom());
2822 return REG_REQ_IGNORE;
2824 tmp = get_wiphy_regdom(wiphy);
2827 rcu_assign_pointer(wiphy->regd, regd);
2828 wiphy_unlock(wiphy);
2829 rcu_free_regdom(tmp);
2833 driver_request->intersect = treatment == REG_REQ_INTERSECT;
2834 driver_request->processed = false;
2837 * Since CRDA will not be called in this case as we already
2838 * have applied the requested regulatory domain before we just
2839 * inform userspace we have processed the request
2841 if (treatment == REG_REQ_ALREADY_SET) {
2842 nl80211_send_reg_change_event(driver_request);
2843 reg_update_last_request(driver_request);
2844 reg_set_request_processed();
2845 return REG_REQ_ALREADY_SET;
2848 if (reg_query_database(driver_request)) {
2849 reg_update_last_request(driver_request);
2853 return REG_REQ_IGNORE;
2856 static enum reg_request_treatment
2857 __reg_process_hint_country_ie(struct wiphy *wiphy,
2858 struct regulatory_request *country_ie_request)
2860 struct wiphy *last_wiphy = NULL;
2861 struct regulatory_request *lr = get_last_request();
2863 if (reg_request_cell_base(lr)) {
2864 /* Trust a Cell base station over the AP's country IE */
2865 if (regdom_changes(country_ie_request->alpha2))
2866 return REG_REQ_IGNORE;
2867 return REG_REQ_ALREADY_SET;
2869 if (wiphy->regulatory_flags & REGULATORY_COUNTRY_IE_IGNORE)
2870 return REG_REQ_IGNORE;
2873 if (unlikely(!is_an_alpha2(country_ie_request->alpha2)))
2876 if (lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE)
2879 last_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx);
2881 if (last_wiphy != wiphy) {
2883 * Two cards with two APs claiming different
2884 * Country IE alpha2s. We could
2885 * intersect them, but that seems unlikely
2886 * to be correct. Reject second one for now.
2888 if (regdom_changes(country_ie_request->alpha2))
2889 return REG_REQ_IGNORE;
2890 return REG_REQ_ALREADY_SET;
2893 if (regdom_changes(country_ie_request->alpha2))
2895 return REG_REQ_ALREADY_SET;
2899 * reg_process_hint_country_ie - process regulatory requests from country IEs
2900 * @wiphy: the wireless device for the regulatory request
2901 * @country_ie_request: a regulatory request from a country IE
2903 * The wireless subsystem can use this function to process
2904 * a regulatory request issued by a country Information Element.
2906 * Returns: one of the different reg request treatment values.
2908 static enum reg_request_treatment
2909 reg_process_hint_country_ie(struct wiphy *wiphy,
2910 struct regulatory_request *country_ie_request)
2912 enum reg_request_treatment treatment;
2914 treatment = __reg_process_hint_country_ie(wiphy, country_ie_request);
2916 switch (treatment) {
2919 case REG_REQ_IGNORE:
2920 return REG_REQ_IGNORE;
2921 case REG_REQ_ALREADY_SET:
2922 reg_free_request(country_ie_request);
2923 return REG_REQ_ALREADY_SET;
2924 case REG_REQ_INTERSECT:
2926 * This doesn't happen yet, not sure we
2927 * ever want to support it for this case.
2929 WARN_ONCE(1, "Unexpected intersection for country elements");
2930 return REG_REQ_IGNORE;
2933 country_ie_request->intersect = false;
2934 country_ie_request->processed = false;
2936 if (reg_query_database(country_ie_request)) {
2937 reg_update_last_request(country_ie_request);
2941 return REG_REQ_IGNORE;
2944 bool reg_dfs_domain_same(struct wiphy *wiphy1, struct wiphy *wiphy2)
2946 const struct ieee80211_regdomain *wiphy1_regd = NULL;
2947 const struct ieee80211_regdomain *wiphy2_regd = NULL;
2948 const struct ieee80211_regdomain *cfg80211_regd = NULL;
2949 bool dfs_domain_same;
2953 cfg80211_regd = rcu_dereference(cfg80211_regdomain);
2954 wiphy1_regd = rcu_dereference(wiphy1->regd);
2956 wiphy1_regd = cfg80211_regd;
2958 wiphy2_regd = rcu_dereference(wiphy2->regd);
2960 wiphy2_regd = cfg80211_regd;
2962 dfs_domain_same = wiphy1_regd->dfs_region == wiphy2_regd->dfs_region;
2966 return dfs_domain_same;
2969 static void reg_copy_dfs_chan_state(struct ieee80211_channel *dst_chan,
2970 struct ieee80211_channel *src_chan)
2972 if (!(dst_chan->flags & IEEE80211_CHAN_RADAR) ||
2973 !(src_chan->flags & IEEE80211_CHAN_RADAR))
2976 if (dst_chan->flags & IEEE80211_CHAN_DISABLED ||
2977 src_chan->flags & IEEE80211_CHAN_DISABLED)
2980 if (src_chan->center_freq == dst_chan->center_freq &&
2981 dst_chan->dfs_state == NL80211_DFS_USABLE) {
2982 dst_chan->dfs_state = src_chan->dfs_state;
2983 dst_chan->dfs_state_entered = src_chan->dfs_state_entered;
2987 static void wiphy_share_dfs_chan_state(struct wiphy *dst_wiphy,
2988 struct wiphy *src_wiphy)
2990 struct ieee80211_supported_band *src_sband, *dst_sband;
2991 struct ieee80211_channel *src_chan, *dst_chan;
2994 if (!reg_dfs_domain_same(dst_wiphy, src_wiphy))
2997 for (band = 0; band < NUM_NL80211_BANDS; band++) {
2998 dst_sband = dst_wiphy->bands[band];
2999 src_sband = src_wiphy->bands[band];
3000 if (!dst_sband || !src_sband)
3003 for (i = 0; i < dst_sband->n_channels; i++) {
3004 dst_chan = &dst_sband->channels[i];
3005 for (j = 0; j < src_sband->n_channels; j++) {
3006 src_chan = &src_sband->channels[j];
3007 reg_copy_dfs_chan_state(dst_chan, src_chan);
3013 static void wiphy_all_share_dfs_chan_state(struct wiphy *wiphy)
3015 struct cfg80211_registered_device *rdev;
3019 for_each_rdev(rdev) {
3020 if (wiphy == &rdev->wiphy)
3022 wiphy_share_dfs_chan_state(wiphy, &rdev->wiphy);
3026 /* This processes *all* regulatory hints */
3027 static void reg_process_hint(struct regulatory_request *reg_request)
3029 struct wiphy *wiphy = NULL;
3030 enum reg_request_treatment treatment;
3031 enum nl80211_reg_initiator initiator = reg_request->initiator;
3033 if (reg_request->wiphy_idx != WIPHY_IDX_INVALID)
3034 wiphy = wiphy_idx_to_wiphy(reg_request->wiphy_idx);
3036 switch (initiator) {
3037 case NL80211_REGDOM_SET_BY_CORE:
3038 treatment = reg_process_hint_core(reg_request);
3040 case NL80211_REGDOM_SET_BY_USER:
3041 treatment = reg_process_hint_user(reg_request);
3043 case NL80211_REGDOM_SET_BY_DRIVER:
3046 treatment = reg_process_hint_driver(wiphy, reg_request);
3048 case NL80211_REGDOM_SET_BY_COUNTRY_IE:
3051 treatment = reg_process_hint_country_ie(wiphy, reg_request);
3054 WARN(1, "invalid initiator %d\n", initiator);
3058 if (treatment == REG_REQ_IGNORE)
3061 WARN(treatment != REG_REQ_OK && treatment != REG_REQ_ALREADY_SET,
3062 "unexpected treatment value %d\n", treatment);
3064 /* This is required so that the orig_* parameters are saved.
3065 * NOTE: treatment must be set for any case that reaches here!
3067 if (treatment == REG_REQ_ALREADY_SET && wiphy &&
3068 wiphy->regulatory_flags & REGULATORY_STRICT_REG) {
3069 wiphy_update_regulatory(wiphy, initiator);
3070 wiphy_all_share_dfs_chan_state(wiphy);
3071 reg_check_channels();
3077 reg_free_request(reg_request);
3080 static void notify_self_managed_wiphys(struct regulatory_request *request)
3082 struct cfg80211_registered_device *rdev;
3083 struct wiphy *wiphy;
3085 for_each_rdev(rdev) {
3086 wiphy = &rdev->wiphy;
3087 if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED &&
3088 request->initiator == NL80211_REGDOM_SET_BY_USER)
3089 reg_call_notifier(wiphy, request);
3094 * Processes regulatory hints, this is all the NL80211_REGDOM_SET_BY_*
3095 * Regulatory hints come on a first come first serve basis and we
3096 * must process each one atomically.
3098 static void reg_process_pending_hints(void)
3100 struct regulatory_request *reg_request, *lr;
3102 lr = get_last_request();
3104 /* When last_request->processed becomes true this will be rescheduled */
3105 if (lr && !lr->processed) {
3106 pr_debug("Pending regulatory request, waiting for it to be processed...\n");
3110 spin_lock(®_requests_lock);
3112 if (list_empty(®_requests_list)) {
3113 spin_unlock(®_requests_lock);
3117 reg_request = list_first_entry(®_requests_list,
3118 struct regulatory_request,
3120 list_del_init(®_request->list);
3122 spin_unlock(®_requests_lock);
3124 notify_self_managed_wiphys(reg_request);
3126 reg_process_hint(reg_request);
3128 lr = get_last_request();
3130 spin_lock(®_requests_lock);
3131 if (!list_empty(®_requests_list) && lr && lr->processed)
3132 schedule_work(®_work);
3133 spin_unlock(®_requests_lock);
3136 /* Processes beacon hints -- this has nothing to do with country IEs */
3137 static void reg_process_pending_beacon_hints(void)
3139 struct cfg80211_registered_device *rdev;
3140 struct reg_beacon *pending_beacon, *tmp;
3142 /* This goes through the _pending_ beacon list */
3143 spin_lock_bh(®_pending_beacons_lock);
3145 list_for_each_entry_safe(pending_beacon, tmp,
3146 ®_pending_beacons, list) {
3147 list_del_init(&pending_beacon->list);
3149 /* Applies the beacon hint to current wiphys */
3151 wiphy_update_new_beacon(&rdev->wiphy, pending_beacon);
3153 /* Remembers the beacon hint for new wiphys or reg changes */
3154 list_add_tail(&pending_beacon->list, ®_beacon_list);
3157 spin_unlock_bh(®_pending_beacons_lock);
3160 static void reg_process_self_managed_hint(struct wiphy *wiphy)
3162 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
3163 const struct ieee80211_regdomain *tmp;
3164 const struct ieee80211_regdomain *regd;
3165 enum nl80211_band band;
3166 struct regulatory_request request = {};
3169 lockdep_assert_wiphy(wiphy);
3171 spin_lock(®_requests_lock);
3172 regd = rdev->requested_regd;
3173 rdev->requested_regd = NULL;
3174 spin_unlock(®_requests_lock);
3179 tmp = get_wiphy_regdom(wiphy);
3180 rcu_assign_pointer(wiphy->regd, regd);
3181 rcu_free_regdom(tmp);
3183 for (band = 0; band < NUM_NL80211_BANDS; band++)
3184 handle_band_custom(wiphy, wiphy->bands[band], regd);
3186 reg_process_ht_flags(wiphy);
3188 request.wiphy_idx = get_wiphy_idx(wiphy);
3189 request.alpha2[0] = regd->alpha2[0];
3190 request.alpha2[1] = regd->alpha2[1];
3191 request.initiator = NL80211_REGDOM_SET_BY_DRIVER;
3193 if (wiphy->flags & WIPHY_FLAG_NOTIFY_REGDOM_BY_DRIVER)
3194 reg_call_notifier(wiphy, &request);
3196 nl80211_send_wiphy_reg_change_event(&request);
3199 static void reg_process_self_managed_hints(void)
3201 struct cfg80211_registered_device *rdev;
3205 for_each_rdev(rdev) {
3206 wiphy_lock(&rdev->wiphy);
3207 reg_process_self_managed_hint(&rdev->wiphy);
3208 wiphy_unlock(&rdev->wiphy);
3211 reg_check_channels();
3214 static void reg_todo(struct work_struct *work)
3217 reg_process_pending_hints();
3218 reg_process_pending_beacon_hints();
3219 reg_process_self_managed_hints();
3223 static void queue_regulatory_request(struct regulatory_request *request)
3225 request->alpha2[0] = toupper(request->alpha2[0]);
3226 request->alpha2[1] = toupper(request->alpha2[1]);
3228 spin_lock(®_requests_lock);
3229 list_add_tail(&request->list, ®_requests_list);
3230 spin_unlock(®_requests_lock);
3232 schedule_work(®_work);
3236 * Core regulatory hint -- happens during cfg80211_init()
3237 * and when we restore regulatory settings.
3239 static int regulatory_hint_core(const char *alpha2)
3241 struct regulatory_request *request;
3243 request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL);
3247 request->alpha2[0] = alpha2[0];
3248 request->alpha2[1] = alpha2[1];
3249 request->initiator = NL80211_REGDOM_SET_BY_CORE;
3250 request->wiphy_idx = WIPHY_IDX_INVALID;
3252 queue_regulatory_request(request);
3258 int regulatory_hint_user(const char *alpha2,
3259 enum nl80211_user_reg_hint_type user_reg_hint_type)
3261 struct regulatory_request *request;
3263 if (WARN_ON(!alpha2))
3266 if (!is_world_regdom(alpha2) && !is_an_alpha2(alpha2))
3269 request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL);
3273 request->wiphy_idx = WIPHY_IDX_INVALID;
3274 request->alpha2[0] = alpha2[0];
3275 request->alpha2[1] = alpha2[1];
3276 request->initiator = NL80211_REGDOM_SET_BY_USER;
3277 request->user_reg_hint_type = user_reg_hint_type;
3279 /* Allow calling CRDA again */
3280 reset_crda_timeouts();
3282 queue_regulatory_request(request);
3287 int regulatory_hint_indoor(bool is_indoor, u32 portid)
3289 spin_lock(®_indoor_lock);
3291 /* It is possible that more than one user space process is trying to
3292 * configure the indoor setting. To handle such cases, clear the indoor
3293 * setting in case that some process does not think that the device
3294 * is operating in an indoor environment. In addition, if a user space
3295 * process indicates that it is controlling the indoor setting, save its
3296 * portid, i.e., make it the owner.
3298 reg_is_indoor = is_indoor;
3299 if (reg_is_indoor) {
3300 if (!reg_is_indoor_portid)
3301 reg_is_indoor_portid = portid;
3303 reg_is_indoor_portid = 0;
3306 spin_unlock(®_indoor_lock);
3309 reg_check_channels();
3314 void regulatory_netlink_notify(u32 portid)
3316 spin_lock(®_indoor_lock);
3318 if (reg_is_indoor_portid != portid) {
3319 spin_unlock(®_indoor_lock);
3323 reg_is_indoor = false;
3324 reg_is_indoor_portid = 0;
3326 spin_unlock(®_indoor_lock);
3328 reg_check_channels();
3332 int regulatory_hint(struct wiphy *wiphy, const char *alpha2)
3334 struct regulatory_request *request;
3336 if (WARN_ON(!alpha2 || !wiphy))
3339 wiphy->regulatory_flags &= ~REGULATORY_CUSTOM_REG;
3341 request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL);
3345 request->wiphy_idx = get_wiphy_idx(wiphy);
3347 request->alpha2[0] = alpha2[0];
3348 request->alpha2[1] = alpha2[1];
3349 request->initiator = NL80211_REGDOM_SET_BY_DRIVER;
3351 /* Allow calling CRDA again */
3352 reset_crda_timeouts();
3354 queue_regulatory_request(request);
3358 EXPORT_SYMBOL(regulatory_hint);
3360 void regulatory_hint_country_ie(struct wiphy *wiphy, enum nl80211_band band,
3361 const u8 *country_ie, u8 country_ie_len)
3364 enum environment_cap env = ENVIRON_ANY;
3365 struct regulatory_request *request = NULL, *lr;
3367 /* IE len must be evenly divisible by 2 */
3368 if (country_ie_len & 0x01)
3371 if (country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
3374 request = kzalloc(sizeof(*request), GFP_KERNEL);
3378 alpha2[0] = country_ie[0];
3379 alpha2[1] = country_ie[1];
3381 if (country_ie[2] == 'I')
3382 env = ENVIRON_INDOOR;
3383 else if (country_ie[2] == 'O')
3384 env = ENVIRON_OUTDOOR;
3387 lr = get_last_request();
3393 * We will run this only upon a successful connection on cfg80211.
3394 * We leave conflict resolution to the workqueue, where can hold
3397 if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE &&
3398 lr->wiphy_idx != WIPHY_IDX_INVALID)
3401 request->wiphy_idx = get_wiphy_idx(wiphy);
3402 request->alpha2[0] = alpha2[0];
3403 request->alpha2[1] = alpha2[1];
3404 request->initiator = NL80211_REGDOM_SET_BY_COUNTRY_IE;
3405 request->country_ie_env = env;
3407 /* Allow calling CRDA again */
3408 reset_crda_timeouts();
3410 queue_regulatory_request(request);
3417 static void restore_alpha2(char *alpha2, bool reset_user)
3419 /* indicates there is no alpha2 to consider for restoration */
3423 /* The user setting has precedence over the module parameter */
3424 if (is_user_regdom_saved()) {
3425 /* Unless we're asked to ignore it and reset it */
3427 pr_debug("Restoring regulatory settings including user preference\n");
3428 user_alpha2[0] = '9';
3429 user_alpha2[1] = '7';
3432 * If we're ignoring user settings, we still need to
3433 * check the module parameter to ensure we put things
3434 * back as they were for a full restore.
3436 if (!is_world_regdom(ieee80211_regdom)) {
3437 pr_debug("Keeping preference on module parameter ieee80211_regdom: %c%c\n",
3438 ieee80211_regdom[0], ieee80211_regdom[1]);
3439 alpha2[0] = ieee80211_regdom[0];
3440 alpha2[1] = ieee80211_regdom[1];
3443 pr_debug("Restoring regulatory settings while preserving user preference for: %c%c\n",
3444 user_alpha2[0], user_alpha2[1]);
3445 alpha2[0] = user_alpha2[0];
3446 alpha2[1] = user_alpha2[1];
3448 } else if (!is_world_regdom(ieee80211_regdom)) {
3449 pr_debug("Keeping preference on module parameter ieee80211_regdom: %c%c\n",
3450 ieee80211_regdom[0], ieee80211_regdom[1]);
3451 alpha2[0] = ieee80211_regdom[0];
3452 alpha2[1] = ieee80211_regdom[1];
3454 pr_debug("Restoring regulatory settings\n");
3457 static void restore_custom_reg_settings(struct wiphy *wiphy)
3459 struct ieee80211_supported_band *sband;
3460 enum nl80211_band band;
3461 struct ieee80211_channel *chan;
3464 for (band = 0; band < NUM_NL80211_BANDS; band++) {
3465 sband = wiphy->bands[band];
3468 for (i = 0; i < sband->n_channels; i++) {
3469 chan = &sband->channels[i];
3470 chan->flags = chan->orig_flags;
3471 chan->max_antenna_gain = chan->orig_mag;
3472 chan->max_power = chan->orig_mpwr;
3473 chan->beacon_found = false;
3479 * Restoring regulatory settings involves ignoring any
3480 * possibly stale country IE information and user regulatory
3481 * settings if so desired, this includes any beacon hints
3482 * learned as we could have traveled outside to another country
3483 * after disconnection. To restore regulatory settings we do
3484 * exactly what we did at bootup:
3486 * - send a core regulatory hint
3487 * - send a user regulatory hint if applicable
3489 * Device drivers that send a regulatory hint for a specific country
3490 * keep their own regulatory domain on wiphy->regd so that does
3491 * not need to be remembered.
3493 static void restore_regulatory_settings(bool reset_user, bool cached)
3496 char world_alpha2[2];
3497 struct reg_beacon *reg_beacon, *btmp;
3498 LIST_HEAD(tmp_reg_req_list);
3499 struct cfg80211_registered_device *rdev;
3504 * Clear the indoor setting in case that it is not controlled by user
3505 * space, as otherwise there is no guarantee that the device is still
3506 * operating in an indoor environment.
3508 spin_lock(®_indoor_lock);
3509 if (reg_is_indoor && !reg_is_indoor_portid) {
3510 reg_is_indoor = false;
3511 reg_check_channels();
3513 spin_unlock(®_indoor_lock);
3515 reset_regdomains(true, &world_regdom);
3516 restore_alpha2(alpha2, reset_user);
3519 * If there's any pending requests we simply
3520 * stash them to a temporary pending queue and
3521 * add then after we've restored regulatory
3524 spin_lock(®_requests_lock);
3525 list_splice_tail_init(®_requests_list, &tmp_reg_req_list);
3526 spin_unlock(®_requests_lock);
3528 /* Clear beacon hints */
3529 spin_lock_bh(®_pending_beacons_lock);
3530 list_for_each_entry_safe(reg_beacon, btmp, ®_pending_beacons, list) {
3531 list_del(®_beacon->list);
3534 spin_unlock_bh(®_pending_beacons_lock);
3536 list_for_each_entry_safe(reg_beacon, btmp, ®_beacon_list, list) {
3537 list_del(®_beacon->list);
3541 /* First restore to the basic regulatory settings */
3542 world_alpha2[0] = cfg80211_world_regdom->alpha2[0];
3543 world_alpha2[1] = cfg80211_world_regdom->alpha2[1];
3545 for_each_rdev(rdev) {
3546 if (rdev->wiphy.regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED)
3548 if (rdev->wiphy.regulatory_flags & REGULATORY_CUSTOM_REG)
3549 restore_custom_reg_settings(&rdev->wiphy);
3552 if (cached && (!is_an_alpha2(alpha2) ||
3553 !IS_ERR_OR_NULL(cfg80211_user_regdom))) {
3554 reset_regdomains(false, cfg80211_world_regdom);
3555 update_all_wiphy_regulatory(NL80211_REGDOM_SET_BY_CORE);
3556 print_regdomain(get_cfg80211_regdom());
3557 nl80211_send_reg_change_event(&core_request_world);
3558 reg_set_request_processed();
3560 if (is_an_alpha2(alpha2) &&
3561 !regulatory_hint_user(alpha2, NL80211_USER_REG_HINT_USER)) {
3562 struct regulatory_request *ureq;
3564 spin_lock(®_requests_lock);
3565 ureq = list_last_entry(®_requests_list,
3566 struct regulatory_request,
3568 list_del(&ureq->list);
3569 spin_unlock(®_requests_lock);
3571 notify_self_managed_wiphys(ureq);
3572 reg_update_last_request(ureq);
3573 set_regdom(reg_copy_regd(cfg80211_user_regdom),
3574 REGD_SOURCE_CACHED);
3577 regulatory_hint_core(world_alpha2);
3580 * This restores the ieee80211_regdom module parameter
3581 * preference or the last user requested regulatory
3582 * settings, user regulatory settings takes precedence.
3584 if (is_an_alpha2(alpha2))
3585 regulatory_hint_user(alpha2, NL80211_USER_REG_HINT_USER);
3588 spin_lock(®_requests_lock);
3589 list_splice_tail_init(&tmp_reg_req_list, ®_requests_list);
3590 spin_unlock(®_requests_lock);
3592 pr_debug("Kicking the queue\n");
3594 schedule_work(®_work);
3597 static bool is_wiphy_all_set_reg_flag(enum ieee80211_regulatory_flags flag)
3599 struct cfg80211_registered_device *rdev;
3600 struct wireless_dev *wdev;
3602 for_each_rdev(rdev) {
3603 wiphy_lock(&rdev->wiphy);
3604 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
3605 if (!(wdev->wiphy->regulatory_flags & flag)) {
3606 wiphy_unlock(&rdev->wiphy);
3610 wiphy_unlock(&rdev->wiphy);
3616 void regulatory_hint_disconnect(void)
3618 /* Restore of regulatory settings is not required when wiphy(s)
3619 * ignore IE from connected access point but clearance of beacon hints
3620 * is required when wiphy(s) supports beacon hints.
3622 if (is_wiphy_all_set_reg_flag(REGULATORY_COUNTRY_IE_IGNORE)) {
3623 struct reg_beacon *reg_beacon, *btmp;
3625 if (is_wiphy_all_set_reg_flag(REGULATORY_DISABLE_BEACON_HINTS))
3628 spin_lock_bh(®_pending_beacons_lock);
3629 list_for_each_entry_safe(reg_beacon, btmp,
3630 ®_pending_beacons, list) {
3631 list_del(®_beacon->list);
3634 spin_unlock_bh(®_pending_beacons_lock);
3636 list_for_each_entry_safe(reg_beacon, btmp,
3637 ®_beacon_list, list) {
3638 list_del(®_beacon->list);
3645 pr_debug("All devices are disconnected, going to restore regulatory settings\n");
3646 restore_regulatory_settings(false, true);
3649 static bool freq_is_chan_12_13_14(u32 freq)
3651 if (freq == ieee80211_channel_to_frequency(12, NL80211_BAND_2GHZ) ||
3652 freq == ieee80211_channel_to_frequency(13, NL80211_BAND_2GHZ) ||
3653 freq == ieee80211_channel_to_frequency(14, NL80211_BAND_2GHZ))
3658 static bool pending_reg_beacon(struct ieee80211_channel *beacon_chan)
3660 struct reg_beacon *pending_beacon;
3662 list_for_each_entry(pending_beacon, ®_pending_beacons, list)
3663 if (ieee80211_channel_equal(beacon_chan,
3664 &pending_beacon->chan))
3669 int regulatory_hint_found_beacon(struct wiphy *wiphy,
3670 struct ieee80211_channel *beacon_chan,
3673 struct reg_beacon *reg_beacon;
3676 if (beacon_chan->beacon_found ||
3677 beacon_chan->flags & IEEE80211_CHAN_RADAR ||
3678 (beacon_chan->band == NL80211_BAND_2GHZ &&
3679 !freq_is_chan_12_13_14(beacon_chan->center_freq)))
3682 spin_lock_bh(®_pending_beacons_lock);
3683 processing = pending_reg_beacon(beacon_chan);
3684 spin_unlock_bh(®_pending_beacons_lock);
3689 reg_beacon = kzalloc(sizeof(struct reg_beacon), gfp);
3693 pr_debug("Found new beacon on frequency: %d.%03d MHz (Ch %d) on %s\n",
3694 beacon_chan->center_freq, beacon_chan->freq_offset,
3695 ieee80211_freq_khz_to_channel(
3696 ieee80211_channel_to_khz(beacon_chan)),
3699 memcpy(®_beacon->chan, beacon_chan,
3700 sizeof(struct ieee80211_channel));
3703 * Since we can be called from BH or and non-BH context
3704 * we must use spin_lock_bh()
3706 spin_lock_bh(®_pending_beacons_lock);
3707 list_add_tail(®_beacon->list, ®_pending_beacons);
3708 spin_unlock_bh(®_pending_beacons_lock);
3710 schedule_work(®_work);
3715 static void print_rd_rules(const struct ieee80211_regdomain *rd)
3718 const struct ieee80211_reg_rule *reg_rule = NULL;
3719 const struct ieee80211_freq_range *freq_range = NULL;
3720 const struct ieee80211_power_rule *power_rule = NULL;
3721 char bw[32], cac_time[32];
3723 pr_debug(" (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp), (dfs_cac_time)\n");
3725 for (i = 0; i < rd->n_reg_rules; i++) {
3726 reg_rule = &rd->reg_rules[i];
3727 freq_range = ®_rule->freq_range;
3728 power_rule = ®_rule->power_rule;
3730 if (reg_rule->flags & NL80211_RRF_AUTO_BW)
3731 snprintf(bw, sizeof(bw), "%d KHz, %u KHz AUTO",
3732 freq_range->max_bandwidth_khz,
3733 reg_get_max_bandwidth(rd, reg_rule));
3735 snprintf(bw, sizeof(bw), "%d KHz",
3736 freq_range->max_bandwidth_khz);
3738 if (reg_rule->flags & NL80211_RRF_DFS)
3739 scnprintf(cac_time, sizeof(cac_time), "%u s",
3740 reg_rule->dfs_cac_ms/1000);
3742 scnprintf(cac_time, sizeof(cac_time), "N/A");
3746 * There may not be documentation for max antenna gain
3747 * in certain regions
3749 if (power_rule->max_antenna_gain)
3750 pr_debug(" (%d KHz - %d KHz @ %s), (%d mBi, %d mBm), (%s)\n",
3751 freq_range->start_freq_khz,
3752 freq_range->end_freq_khz,
3754 power_rule->max_antenna_gain,
3755 power_rule->max_eirp,
3758 pr_debug(" (%d KHz - %d KHz @ %s), (N/A, %d mBm), (%s)\n",
3759 freq_range->start_freq_khz,
3760 freq_range->end_freq_khz,
3762 power_rule->max_eirp,
3767 bool reg_supported_dfs_region(enum nl80211_dfs_regions dfs_region)
3769 switch (dfs_region) {
3770 case NL80211_DFS_UNSET:
3771 case NL80211_DFS_FCC:
3772 case NL80211_DFS_ETSI:
3773 case NL80211_DFS_JP:
3776 pr_debug("Ignoring unknown DFS master region: %d\n", dfs_region);
3781 static void print_regdomain(const struct ieee80211_regdomain *rd)
3783 struct regulatory_request *lr = get_last_request();
3785 if (is_intersected_alpha2(rd->alpha2)) {
3786 if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) {
3787 struct cfg80211_registered_device *rdev;
3788 rdev = cfg80211_rdev_by_wiphy_idx(lr->wiphy_idx);
3790 pr_debug("Current regulatory domain updated by AP to: %c%c\n",
3791 rdev->country_ie_alpha2[0],
3792 rdev->country_ie_alpha2[1]);
3794 pr_debug("Current regulatory domain intersected:\n");
3796 pr_debug("Current regulatory domain intersected:\n");
3797 } else if (is_world_regdom(rd->alpha2)) {
3798 pr_debug("World regulatory domain updated:\n");
3800 if (is_unknown_alpha2(rd->alpha2))
3801 pr_debug("Regulatory domain changed to driver built-in settings (unknown country)\n");
3803 if (reg_request_cell_base(lr))
3804 pr_debug("Regulatory domain changed to country: %c%c by Cell Station\n",
3805 rd->alpha2[0], rd->alpha2[1]);
3807 pr_debug("Regulatory domain changed to country: %c%c\n",
3808 rd->alpha2[0], rd->alpha2[1]);
3812 pr_debug(" DFS Master region: %s", reg_dfs_region_str(rd->dfs_region));
3816 static void print_regdomain_info(const struct ieee80211_regdomain *rd)
3818 pr_debug("Regulatory domain: %c%c\n", rd->alpha2[0], rd->alpha2[1]);
3822 static int reg_set_rd_core(const struct ieee80211_regdomain *rd)
3824 if (!is_world_regdom(rd->alpha2))
3826 update_world_regdomain(rd);
3830 static int reg_set_rd_user(const struct ieee80211_regdomain *rd,
3831 struct regulatory_request *user_request)
3833 const struct ieee80211_regdomain *intersected_rd = NULL;
3835 if (!regdom_changes(rd->alpha2))
3838 if (!is_valid_rd(rd)) {
3839 pr_err("Invalid regulatory domain detected: %c%c\n",
3840 rd->alpha2[0], rd->alpha2[1]);
3841 print_regdomain_info(rd);
3845 if (!user_request->intersect) {
3846 reset_regdomains(false, rd);
3850 intersected_rd = regdom_intersect(rd, get_cfg80211_regdom());
3851 if (!intersected_rd)
3856 reset_regdomains(false, intersected_rd);
3861 static int reg_set_rd_driver(const struct ieee80211_regdomain *rd,
3862 struct regulatory_request *driver_request)
3864 const struct ieee80211_regdomain *regd;
3865 const struct ieee80211_regdomain *intersected_rd = NULL;
3866 const struct ieee80211_regdomain *tmp = NULL;
3867 struct wiphy *request_wiphy;
3869 if (is_world_regdom(rd->alpha2))
3872 if (!regdom_changes(rd->alpha2))
3875 if (!is_valid_rd(rd)) {
3876 pr_err("Invalid regulatory domain detected: %c%c\n",
3877 rd->alpha2[0], rd->alpha2[1]);
3878 print_regdomain_info(rd);
3882 request_wiphy = wiphy_idx_to_wiphy(driver_request->wiphy_idx);
3886 if (!driver_request->intersect) {
3888 wiphy_lock(request_wiphy);
3889 if (request_wiphy->regd)
3890 tmp = get_wiphy_regdom(request_wiphy);
3892 regd = reg_copy_regd(rd);
3894 wiphy_unlock(request_wiphy);
3895 return PTR_ERR(regd);
3898 rcu_assign_pointer(request_wiphy->regd, regd);
3899 rcu_free_regdom(tmp);
3900 wiphy_unlock(request_wiphy);
3901 reset_regdomains(false, rd);
3905 intersected_rd = regdom_intersect(rd, get_cfg80211_regdom());
3906 if (!intersected_rd)
3910 * We can trash what CRDA provided now.
3911 * However if a driver requested this specific regulatory
3912 * domain we keep it for its private use
3914 tmp = get_wiphy_regdom(request_wiphy);
3915 rcu_assign_pointer(request_wiphy->regd, rd);
3916 rcu_free_regdom(tmp);
3920 reset_regdomains(false, intersected_rd);
3925 static int reg_set_rd_country_ie(const struct ieee80211_regdomain *rd,
3926 struct regulatory_request *country_ie_request)
3928 struct wiphy *request_wiphy;
3930 if (!is_alpha2_set(rd->alpha2) && !is_an_alpha2(rd->alpha2) &&
3931 !is_unknown_alpha2(rd->alpha2))
3935 * Lets only bother proceeding on the same alpha2 if the current
3936 * rd is non static (it means CRDA was present and was used last)
3937 * and the pending request came in from a country IE
3940 if (!is_valid_rd(rd)) {
3941 pr_err("Invalid regulatory domain detected: %c%c\n",
3942 rd->alpha2[0], rd->alpha2[1]);
3943 print_regdomain_info(rd);
3947 request_wiphy = wiphy_idx_to_wiphy(country_ie_request->wiphy_idx);
3951 if (country_ie_request->intersect)
3954 reset_regdomains(false, rd);
3959 * Use this call to set the current regulatory domain. Conflicts with
3960 * multiple drivers can be ironed out later. Caller must've already
3961 * kmalloc'd the rd structure.
3963 int set_regdom(const struct ieee80211_regdomain *rd,
3964 enum ieee80211_regd_source regd_src)
3966 struct regulatory_request *lr;
3967 bool user_reset = false;
3970 if (IS_ERR_OR_NULL(rd))
3973 if (!reg_is_valid_request(rd->alpha2)) {
3978 if (regd_src == REGD_SOURCE_CRDA)
3979 reset_crda_timeouts();
3981 lr = get_last_request();
3983 /* Note that this doesn't update the wiphys, this is done below */
3984 switch (lr->initiator) {
3985 case NL80211_REGDOM_SET_BY_CORE:
3986 r = reg_set_rd_core(rd);
3988 case NL80211_REGDOM_SET_BY_USER:
3989 cfg80211_save_user_regdom(rd);
3990 r = reg_set_rd_user(rd, lr);
3993 case NL80211_REGDOM_SET_BY_DRIVER:
3994 r = reg_set_rd_driver(rd, lr);
3996 case NL80211_REGDOM_SET_BY_COUNTRY_IE:
3997 r = reg_set_rd_country_ie(rd, lr);
4000 WARN(1, "invalid initiator %d\n", lr->initiator);
4008 reg_set_request_processed();
4011 /* Back to world regulatory in case of errors */
4012 restore_regulatory_settings(user_reset, false);
4019 /* This would make this whole thing pointless */
4020 if (WARN_ON(!lr->intersect && rd != get_cfg80211_regdom()))
4023 /* update all wiphys now with the new established regulatory domain */
4024 update_all_wiphy_regulatory(lr->initiator);
4026 print_regdomain(get_cfg80211_regdom());
4028 nl80211_send_reg_change_event(lr);
4030 reg_set_request_processed();
4035 static int __regulatory_set_wiphy_regd(struct wiphy *wiphy,
4036 struct ieee80211_regdomain *rd)
4038 const struct ieee80211_regdomain *regd;
4039 const struct ieee80211_regdomain *prev_regd;
4040 struct cfg80211_registered_device *rdev;
4042 if (WARN_ON(!wiphy || !rd))
4045 if (WARN(!(wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED),
4046 "wiphy should have REGULATORY_WIPHY_SELF_MANAGED\n"))
4049 if (WARN(!is_valid_rd(rd),
4050 "Invalid regulatory domain detected: %c%c\n",
4051 rd->alpha2[0], rd->alpha2[1])) {
4052 print_regdomain_info(rd);
4056 regd = reg_copy_regd(rd);
4058 return PTR_ERR(regd);
4060 rdev = wiphy_to_rdev(wiphy);
4062 spin_lock(®_requests_lock);
4063 prev_regd = rdev->requested_regd;
4064 rdev->requested_regd = regd;
4065 spin_unlock(®_requests_lock);
4071 int regulatory_set_wiphy_regd(struct wiphy *wiphy,
4072 struct ieee80211_regdomain *rd)
4074 int ret = __regulatory_set_wiphy_regd(wiphy, rd);
4079 schedule_work(®_work);
4082 EXPORT_SYMBOL(regulatory_set_wiphy_regd);
4084 int regulatory_set_wiphy_regd_sync(struct wiphy *wiphy,
4085 struct ieee80211_regdomain *rd)
4091 ret = __regulatory_set_wiphy_regd(wiphy, rd);
4095 /* process the request immediately */
4096 reg_process_self_managed_hint(wiphy);
4097 reg_check_channels();
4100 EXPORT_SYMBOL(regulatory_set_wiphy_regd_sync);
4102 void wiphy_regulatory_register(struct wiphy *wiphy)
4104 struct regulatory_request *lr = get_last_request();
4106 /* self-managed devices ignore beacon hints and country IE */
4107 if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) {
4108 wiphy->regulatory_flags |= REGULATORY_DISABLE_BEACON_HINTS |
4109 REGULATORY_COUNTRY_IE_IGNORE;
4112 * The last request may have been received before this
4113 * registration call. Call the driver notifier if
4114 * initiator is USER.
4116 if (lr->initiator == NL80211_REGDOM_SET_BY_USER)
4117 reg_call_notifier(wiphy, lr);
4120 if (!reg_dev_ignore_cell_hint(wiphy))
4121 reg_num_devs_support_basehint++;
4123 wiphy_update_regulatory(wiphy, lr->initiator);
4124 wiphy_all_share_dfs_chan_state(wiphy);
4125 reg_process_self_managed_hints();
4128 void wiphy_regulatory_deregister(struct wiphy *wiphy)
4130 struct wiphy *request_wiphy = NULL;
4131 struct regulatory_request *lr;
4133 lr = get_last_request();
4135 if (!reg_dev_ignore_cell_hint(wiphy))
4136 reg_num_devs_support_basehint--;
4138 rcu_free_regdom(get_wiphy_regdom(wiphy));
4139 RCU_INIT_POINTER(wiphy->regd, NULL);
4142 request_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx);
4144 if (!request_wiphy || request_wiphy != wiphy)
4147 lr->wiphy_idx = WIPHY_IDX_INVALID;
4148 lr->country_ie_env = ENVIRON_ANY;
4152 * See FCC notices for UNII band definitions
4153 * 5GHz: https://www.fcc.gov/document/5-ghz-unlicensed-spectrum-unii
4154 * 6GHz: https://www.fcc.gov/document/fcc-proposes-more-spectrum-unlicensed-use-0
4156 int cfg80211_get_unii(int freq)
4159 if (freq >= 5150 && freq <= 5250)
4163 if (freq > 5250 && freq <= 5350)
4167 if (freq > 5350 && freq <= 5470)
4171 if (freq > 5470 && freq <= 5725)
4175 if (freq > 5725 && freq <= 5825)
4179 if (freq > 5925 && freq <= 6425)
4183 if (freq > 6425 && freq <= 6525)
4187 if (freq > 6525 && freq <= 6875)
4191 if (freq > 6875 && freq <= 7125)
4197 bool regulatory_indoor_allowed(void)
4199 return reg_is_indoor;
4202 bool regulatory_pre_cac_allowed(struct wiphy *wiphy)
4204 const struct ieee80211_regdomain *regd = NULL;
4205 const struct ieee80211_regdomain *wiphy_regd = NULL;
4206 bool pre_cac_allowed = false;
4210 regd = rcu_dereference(cfg80211_regdomain);
4211 wiphy_regd = rcu_dereference(wiphy->regd);
4213 if (regd->dfs_region == NL80211_DFS_ETSI)
4214 pre_cac_allowed = true;
4218 return pre_cac_allowed;
4221 if (regd->dfs_region == wiphy_regd->dfs_region &&
4222 wiphy_regd->dfs_region == NL80211_DFS_ETSI)
4223 pre_cac_allowed = true;
4227 return pre_cac_allowed;
4229 EXPORT_SYMBOL(regulatory_pre_cac_allowed);
4231 static void cfg80211_check_and_end_cac(struct cfg80211_registered_device *rdev)
4233 struct wireless_dev *wdev;
4234 /* If we finished CAC or received radar, we should end any
4235 * CAC running on the same channels.
4236 * the check !cfg80211_chandef_dfs_usable contain 2 options:
4237 * either all channels are available - those the CAC_FINISHED
4238 * event has effected another wdev state, or there is a channel
4239 * in unavailable state in wdev chandef - those the RADAR_DETECTED
4240 * event has effected another wdev state.
4241 * In both cases we should end the CAC on the wdev.
4243 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
4244 struct cfg80211_chan_def *chandef;
4246 if (!wdev->cac_started)
4249 /* FIXME: radar detection is tied to link 0 for now */
4250 chandef = wdev_chandef(wdev, 0);
4254 if (!cfg80211_chandef_dfs_usable(&rdev->wiphy, chandef))
4255 rdev_end_cac(rdev, wdev->netdev);
4259 void regulatory_propagate_dfs_state(struct wiphy *wiphy,
4260 struct cfg80211_chan_def *chandef,
4261 enum nl80211_dfs_state dfs_state,
4262 enum nl80211_radar_event event)
4264 struct cfg80211_registered_device *rdev;
4268 if (WARN_ON(!cfg80211_chandef_valid(chandef)))
4271 for_each_rdev(rdev) {
4272 if (wiphy == &rdev->wiphy)
4275 if (!reg_dfs_domain_same(wiphy, &rdev->wiphy))
4278 if (!ieee80211_get_channel(&rdev->wiphy,
4279 chandef->chan->center_freq))
4282 cfg80211_set_dfs_state(&rdev->wiphy, chandef, dfs_state);
4284 if (event == NL80211_RADAR_DETECTED ||
4285 event == NL80211_RADAR_CAC_FINISHED) {
4286 cfg80211_sched_dfs_chan_update(rdev);
4287 cfg80211_check_and_end_cac(rdev);
4290 nl80211_radar_notify(rdev, chandef, event, NULL, GFP_KERNEL);
4294 static int __init regulatory_init_db(void)
4299 * It's possible that - due to other bugs/issues - cfg80211
4300 * never called regulatory_init() below, or that it failed;
4301 * in that case, don't try to do any further work here as
4302 * it's doomed to lead to crashes.
4304 if (IS_ERR_OR_NULL(reg_pdev))
4307 err = load_builtin_regdb_keys();
4309 platform_device_unregister(reg_pdev);
4313 /* We always try to get an update for the static regdomain */
4314 err = regulatory_hint_core(cfg80211_world_regdom->alpha2);
4316 if (err == -ENOMEM) {
4317 platform_device_unregister(reg_pdev);
4321 * N.B. kobject_uevent_env() can fail mainly for when we're out
4322 * memory which is handled and propagated appropriately above
4323 * but it can also fail during a netlink_broadcast() or during
4324 * early boot for call_usermodehelper(). For now treat these
4325 * errors as non-fatal.
4327 pr_err("kobject_uevent_env() was unable to call CRDA during init\n");
4331 * Finally, if the user set the module parameter treat it
4334 if (!is_world_regdom(ieee80211_regdom))
4335 regulatory_hint_user(ieee80211_regdom,
4336 NL80211_USER_REG_HINT_USER);
4341 late_initcall(regulatory_init_db);
4344 int __init regulatory_init(void)
4346 reg_pdev = platform_device_register_simple("regulatory", 0, NULL, 0);
4347 if (IS_ERR(reg_pdev))
4348 return PTR_ERR(reg_pdev);
4350 rcu_assign_pointer(cfg80211_regdomain, cfg80211_world_regdom);
4352 user_alpha2[0] = '9';
4353 user_alpha2[1] = '7';
4356 return regulatory_init_db();
4362 void regulatory_exit(void)
4364 struct regulatory_request *reg_request, *tmp;
4365 struct reg_beacon *reg_beacon, *btmp;
4367 cancel_work_sync(®_work);
4368 cancel_crda_timeout_sync();
4369 cancel_delayed_work_sync(®_check_chans);
4371 /* Lock to suppress warnings */
4373 reset_regdomains(true, NULL);
4376 dev_set_uevent_suppress(®_pdev->dev, true);
4378 platform_device_unregister(reg_pdev);
4380 list_for_each_entry_safe(reg_beacon, btmp, ®_pending_beacons, list) {
4381 list_del(®_beacon->list);
4385 list_for_each_entry_safe(reg_beacon, btmp, ®_beacon_list, list) {
4386 list_del(®_beacon->list);
4390 list_for_each_entry_safe(reg_request, tmp, ®_requests_list, list) {
4391 list_del(®_request->list);
4395 if (!IS_ERR_OR_NULL(regdb))
4397 if (!IS_ERR_OR_NULL(cfg80211_user_regdom))
4398 kfree(cfg80211_user_regdom);
4400 free_regdb_keyring();