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 - 2021 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 <net/cfg80211.h>
67 * Grace period we give before making sure all current interfaces reside on
68 * channels allowed by the current regulatory domain.
70 #define REG_ENFORCE_GRACE_MS 60000
73 * enum reg_request_treatment - regulatory request treatment
75 * @REG_REQ_OK: continue processing the regulatory request
76 * @REG_REQ_IGNORE: ignore the regulatory request
77 * @REG_REQ_INTERSECT: the regulatory domain resulting from this request should
78 * be intersected with the current one.
79 * @REG_REQ_ALREADY_SET: the regulatory request will not change the current
80 * regulatory settings, and no further processing is required.
82 enum reg_request_treatment {
89 static struct regulatory_request core_request_world = {
90 .initiator = NL80211_REGDOM_SET_BY_CORE,
95 .country_ie_env = ENVIRON_ANY,
99 * Receipt of information from last regulatory request,
100 * protected by RTNL (and can be accessed with RCU protection)
102 static struct regulatory_request __rcu *last_request =
103 (void __force __rcu *)&core_request_world;
105 /* To trigger userspace events and load firmware */
106 static struct platform_device *reg_pdev;
109 * Central wireless core regulatory domains, we only need two,
110 * the current one and a world regulatory domain in case we have no
111 * information to give us an alpha2.
112 * (protected by RTNL, can be read under RCU)
114 const struct ieee80211_regdomain __rcu *cfg80211_regdomain;
117 * Number of devices that registered to the core
118 * that support cellular base station regulatory hints
119 * (protected by RTNL)
121 static int reg_num_devs_support_basehint;
124 * State variable indicating if the platform on which the devices
125 * are attached is operating in an indoor environment. The state variable
126 * is relevant for all registered devices.
128 static bool reg_is_indoor;
129 static DEFINE_SPINLOCK(reg_indoor_lock);
131 /* Used to track the userspace process controlling the indoor setting */
132 static u32 reg_is_indoor_portid;
134 static void restore_regulatory_settings(bool reset_user, bool cached);
135 static void print_regdomain(const struct ieee80211_regdomain *rd);
137 static const struct ieee80211_regdomain *get_cfg80211_regdom(void)
139 return rcu_dereference_rtnl(cfg80211_regdomain);
143 * Returns the regulatory domain associated with the wiphy.
145 * Requires any of RTNL, wiphy mutex or RCU protection.
147 const struct ieee80211_regdomain *get_wiphy_regdom(struct wiphy *wiphy)
149 return rcu_dereference_check(wiphy->regd,
150 lockdep_is_held(&wiphy->mtx) ||
151 lockdep_rtnl_is_held());
153 EXPORT_SYMBOL(get_wiphy_regdom);
155 static const char *reg_dfs_region_str(enum nl80211_dfs_regions dfs_region)
157 switch (dfs_region) {
158 case NL80211_DFS_UNSET:
160 case NL80211_DFS_FCC:
162 case NL80211_DFS_ETSI:
170 enum nl80211_dfs_regions reg_get_dfs_region(struct wiphy *wiphy)
172 const struct ieee80211_regdomain *regd = NULL;
173 const struct ieee80211_regdomain *wiphy_regd = NULL;
174 enum nl80211_dfs_regions dfs_region;
177 regd = get_cfg80211_regdom();
178 dfs_region = regd->dfs_region;
183 wiphy_regd = get_wiphy_regdom(wiphy);
187 if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) {
188 dfs_region = wiphy_regd->dfs_region;
192 if (wiphy_regd->dfs_region == regd->dfs_region)
195 pr_debug("%s: device specific dfs_region (%s) disagrees with cfg80211's central dfs_region (%s)\n",
196 dev_name(&wiphy->dev),
197 reg_dfs_region_str(wiphy_regd->dfs_region),
198 reg_dfs_region_str(regd->dfs_region));
206 static void rcu_free_regdom(const struct ieee80211_regdomain *r)
210 kfree_rcu((struct ieee80211_regdomain *)r, rcu_head);
213 static struct regulatory_request *get_last_request(void)
215 return rcu_dereference_rtnl(last_request);
218 /* Used to queue up regulatory hints */
219 static LIST_HEAD(reg_requests_list);
220 static DEFINE_SPINLOCK(reg_requests_lock);
222 /* Used to queue up beacon hints for review */
223 static LIST_HEAD(reg_pending_beacons);
224 static DEFINE_SPINLOCK(reg_pending_beacons_lock);
226 /* Used to keep track of processed beacon hints */
227 static LIST_HEAD(reg_beacon_list);
230 struct list_head list;
231 struct ieee80211_channel chan;
234 static void reg_check_chans_work(struct work_struct *work);
235 static DECLARE_DELAYED_WORK(reg_check_chans, reg_check_chans_work);
237 static void reg_todo(struct work_struct *work);
238 static DECLARE_WORK(reg_work, reg_todo);
240 /* We keep a static world regulatory domain in case of the absence of CRDA */
241 static const struct ieee80211_regdomain world_regdom = {
245 /* IEEE 802.11b/g, channels 1..11 */
246 REG_RULE(2412-10, 2462+10, 40, 6, 20, 0),
247 /* IEEE 802.11b/g, channels 12..13. */
248 REG_RULE(2467-10, 2472+10, 20, 6, 20,
249 NL80211_RRF_NO_IR | NL80211_RRF_AUTO_BW),
250 /* IEEE 802.11 channel 14 - Only JP enables
251 * this and for 802.11b only */
252 REG_RULE(2484-10, 2484+10, 20, 6, 20,
254 NL80211_RRF_NO_OFDM),
255 /* IEEE 802.11a, channel 36..48 */
256 REG_RULE(5180-10, 5240+10, 80, 6, 20,
258 NL80211_RRF_AUTO_BW),
260 /* IEEE 802.11a, channel 52..64 - DFS required */
261 REG_RULE(5260-10, 5320+10, 80, 6, 20,
263 NL80211_RRF_AUTO_BW |
266 /* IEEE 802.11a, channel 100..144 - DFS required */
267 REG_RULE(5500-10, 5720+10, 160, 6, 20,
271 /* IEEE 802.11a, channel 149..165 */
272 REG_RULE(5745-10, 5825+10, 80, 6, 20,
275 /* IEEE 802.11ad (60GHz), channels 1..3 */
276 REG_RULE(56160+2160*1-1080, 56160+2160*3+1080, 2160, 0, 0, 0),
280 /* protected by RTNL */
281 static const struct ieee80211_regdomain *cfg80211_world_regdom =
284 static char *ieee80211_regdom = "00";
285 static char user_alpha2[2];
286 static const struct ieee80211_regdomain *cfg80211_user_regdom;
288 module_param(ieee80211_regdom, charp, 0444);
289 MODULE_PARM_DESC(ieee80211_regdom, "IEEE 802.11 regulatory domain code");
291 static void reg_free_request(struct regulatory_request *request)
293 if (request == &core_request_world)
296 if (request != get_last_request())
300 static void reg_free_last_request(void)
302 struct regulatory_request *lr = get_last_request();
304 if (lr != &core_request_world && lr)
305 kfree_rcu(lr, rcu_head);
308 static void reg_update_last_request(struct regulatory_request *request)
310 struct regulatory_request *lr;
312 lr = get_last_request();
316 reg_free_last_request();
317 rcu_assign_pointer(last_request, request);
320 static void reset_regdomains(bool full_reset,
321 const struct ieee80211_regdomain *new_regdom)
323 const struct ieee80211_regdomain *r;
327 r = get_cfg80211_regdom();
329 /* avoid freeing static information or freeing something twice */
330 if (r == cfg80211_world_regdom)
332 if (cfg80211_world_regdom == &world_regdom)
333 cfg80211_world_regdom = NULL;
334 if (r == &world_regdom)
338 rcu_free_regdom(cfg80211_world_regdom);
340 cfg80211_world_regdom = &world_regdom;
341 rcu_assign_pointer(cfg80211_regdomain, new_regdom);
346 reg_update_last_request(&core_request_world);
350 * Dynamic world regulatory domain requested by the wireless
351 * core upon initialization
353 static void update_world_regdomain(const struct ieee80211_regdomain *rd)
355 struct regulatory_request *lr;
357 lr = get_last_request();
361 reset_regdomains(false, rd);
363 cfg80211_world_regdom = rd;
366 bool is_world_regdom(const char *alpha2)
370 return alpha2[0] == '0' && alpha2[1] == '0';
373 static bool is_alpha2_set(const char *alpha2)
377 return alpha2[0] && alpha2[1];
380 static bool is_unknown_alpha2(const char *alpha2)
385 * Special case where regulatory domain was built by driver
386 * but a specific alpha2 cannot be determined
388 return alpha2[0] == '9' && alpha2[1] == '9';
391 static bool is_intersected_alpha2(const char *alpha2)
396 * Special case where regulatory domain is the
397 * result of an intersection between two regulatory domain
400 return alpha2[0] == '9' && alpha2[1] == '8';
403 static bool is_an_alpha2(const char *alpha2)
407 return isalpha(alpha2[0]) && isalpha(alpha2[1]);
410 static bool alpha2_equal(const char *alpha2_x, const char *alpha2_y)
412 if (!alpha2_x || !alpha2_y)
414 return alpha2_x[0] == alpha2_y[0] && alpha2_x[1] == alpha2_y[1];
417 static bool regdom_changes(const char *alpha2)
419 const struct ieee80211_regdomain *r = get_cfg80211_regdom();
423 return !alpha2_equal(r->alpha2, alpha2);
427 * The NL80211_REGDOM_SET_BY_USER regdom alpha2 is cached, this lets
428 * you know if a valid regulatory hint with NL80211_REGDOM_SET_BY_USER
429 * has ever been issued.
431 static bool is_user_regdom_saved(void)
433 if (user_alpha2[0] == '9' && user_alpha2[1] == '7')
436 /* This would indicate a mistake on the design */
437 if (WARN(!is_world_regdom(user_alpha2) && !is_an_alpha2(user_alpha2),
438 "Unexpected user alpha2: %c%c\n",
439 user_alpha2[0], user_alpha2[1]))
445 static const struct ieee80211_regdomain *
446 reg_copy_regd(const struct ieee80211_regdomain *src_regd)
448 struct ieee80211_regdomain *regd;
451 regd = kzalloc(struct_size(regd, reg_rules, src_regd->n_reg_rules),
454 return ERR_PTR(-ENOMEM);
456 memcpy(regd, src_regd, sizeof(struct ieee80211_regdomain));
458 for (i = 0; i < src_regd->n_reg_rules; i++)
459 memcpy(®d->reg_rules[i], &src_regd->reg_rules[i],
460 sizeof(struct ieee80211_reg_rule));
465 static void cfg80211_save_user_regdom(const struct ieee80211_regdomain *rd)
469 if (!IS_ERR(cfg80211_user_regdom))
470 kfree(cfg80211_user_regdom);
471 cfg80211_user_regdom = reg_copy_regd(rd);
474 struct reg_regdb_apply_request {
475 struct list_head list;
476 const struct ieee80211_regdomain *regdom;
479 static LIST_HEAD(reg_regdb_apply_list);
480 static DEFINE_MUTEX(reg_regdb_apply_mutex);
482 static void reg_regdb_apply(struct work_struct *work)
484 struct reg_regdb_apply_request *request;
488 mutex_lock(®_regdb_apply_mutex);
489 while (!list_empty(®_regdb_apply_list)) {
490 request = list_first_entry(®_regdb_apply_list,
491 struct reg_regdb_apply_request,
493 list_del(&request->list);
495 set_regdom(request->regdom, REGD_SOURCE_INTERNAL_DB);
498 mutex_unlock(®_regdb_apply_mutex);
503 static DECLARE_WORK(reg_regdb_work, reg_regdb_apply);
505 static int reg_schedule_apply(const struct ieee80211_regdomain *regdom)
507 struct reg_regdb_apply_request *request;
509 request = kzalloc(sizeof(struct reg_regdb_apply_request), GFP_KERNEL);
515 request->regdom = regdom;
517 mutex_lock(®_regdb_apply_mutex);
518 list_add_tail(&request->list, ®_regdb_apply_list);
519 mutex_unlock(®_regdb_apply_mutex);
521 schedule_work(®_regdb_work);
525 #ifdef CONFIG_CFG80211_CRDA_SUPPORT
526 /* Max number of consecutive attempts to communicate with CRDA */
527 #define REG_MAX_CRDA_TIMEOUTS 10
529 static u32 reg_crda_timeouts;
531 static void crda_timeout_work(struct work_struct *work);
532 static DECLARE_DELAYED_WORK(crda_timeout, crda_timeout_work);
534 static void crda_timeout_work(struct work_struct *work)
536 pr_debug("Timeout while waiting for CRDA to reply, restoring regulatory settings\n");
539 restore_regulatory_settings(true, false);
543 static void cancel_crda_timeout(void)
545 cancel_delayed_work(&crda_timeout);
548 static void cancel_crda_timeout_sync(void)
550 cancel_delayed_work_sync(&crda_timeout);
553 static void reset_crda_timeouts(void)
555 reg_crda_timeouts = 0;
559 * This lets us keep regulatory code which is updated on a regulatory
560 * basis in userspace.
562 static int call_crda(const char *alpha2)
565 char *env[] = { country, NULL };
568 snprintf(country, sizeof(country), "COUNTRY=%c%c",
569 alpha2[0], alpha2[1]);
571 if (reg_crda_timeouts > REG_MAX_CRDA_TIMEOUTS) {
572 pr_debug("Exceeded CRDA call max attempts. Not calling CRDA\n");
576 if (!is_world_regdom((char *) alpha2))
577 pr_debug("Calling CRDA for country: %c%c\n",
578 alpha2[0], alpha2[1]);
580 pr_debug("Calling CRDA to update world regulatory domain\n");
582 ret = kobject_uevent_env(®_pdev->dev.kobj, KOBJ_CHANGE, env);
586 queue_delayed_work(system_power_efficient_wq,
587 &crda_timeout, msecs_to_jiffies(3142));
591 static inline void cancel_crda_timeout(void) {}
592 static inline void cancel_crda_timeout_sync(void) {}
593 static inline void reset_crda_timeouts(void) {}
594 static inline int call_crda(const char *alpha2)
598 #endif /* CONFIG_CFG80211_CRDA_SUPPORT */
600 /* code to directly load a firmware database through request_firmware */
601 static const struct fwdb_header *regdb;
603 struct fwdb_country {
606 /* this struct cannot be extended */
607 } __packed __aligned(4);
609 struct fwdb_collection {
613 /* no optional data yet */
614 /* aligned to 2, then followed by __be16 array of rule pointers */
615 } __packed __aligned(4);
618 FWDB_FLAG_NO_OFDM = BIT(0),
619 FWDB_FLAG_NO_OUTDOOR = BIT(1),
620 FWDB_FLAG_DFS = BIT(2),
621 FWDB_FLAG_NO_IR = BIT(3),
622 FWDB_FLAG_AUTO_BW = BIT(4),
631 struct fwdb_wmm_rule {
632 struct fwdb_wmm_ac client[IEEE80211_NUM_ACS];
633 struct fwdb_wmm_ac ap[IEEE80211_NUM_ACS];
640 __be32 start, end, max_bw;
641 /* start of optional data */
644 } __packed __aligned(4);
646 #define FWDB_MAGIC 0x52474442
647 #define FWDB_VERSION 20
652 struct fwdb_country country[];
653 } __packed __aligned(4);
655 static int ecw2cw(int ecw)
657 return (1 << ecw) - 1;
660 static bool valid_wmm(struct fwdb_wmm_rule *rule)
662 struct fwdb_wmm_ac *ac = (struct fwdb_wmm_ac *)rule;
665 for (i = 0; i < IEEE80211_NUM_ACS * 2; i++) {
666 u16 cw_min = ecw2cw((ac[i].ecw & 0xf0) >> 4);
667 u16 cw_max = ecw2cw(ac[i].ecw & 0x0f);
668 u8 aifsn = ac[i].aifsn;
670 if (cw_min >= cw_max)
680 static bool valid_rule(const u8 *data, unsigned int size, u16 rule_ptr)
682 struct fwdb_rule *rule = (void *)(data + (rule_ptr << 2));
684 if ((u8 *)rule + sizeof(rule->len) > data + size)
687 /* mandatory fields */
688 if (rule->len < offsetofend(struct fwdb_rule, max_bw))
690 if (rule->len >= offsetofend(struct fwdb_rule, wmm_ptr)) {
691 u32 wmm_ptr = be16_to_cpu(rule->wmm_ptr) << 2;
692 struct fwdb_wmm_rule *wmm;
694 if (wmm_ptr + sizeof(struct fwdb_wmm_rule) > size)
697 wmm = (void *)(data + wmm_ptr);
705 static bool valid_country(const u8 *data, unsigned int size,
706 const struct fwdb_country *country)
708 unsigned int ptr = be16_to_cpu(country->coll_ptr) << 2;
709 struct fwdb_collection *coll = (void *)(data + ptr);
713 /* make sure we can read len/n_rules */
714 if ((u8 *)coll + offsetofend(typeof(*coll), n_rules) > data + size)
717 /* make sure base struct and all rules fit */
718 if ((u8 *)coll + ALIGN(coll->len, 2) +
719 (coll->n_rules * 2) > data + size)
722 /* mandatory fields must exist */
723 if (coll->len < offsetofend(struct fwdb_collection, dfs_region))
726 rules_ptr = (void *)((u8 *)coll + ALIGN(coll->len, 2));
728 for (i = 0; i < coll->n_rules; i++) {
729 u16 rule_ptr = be16_to_cpu(rules_ptr[i]);
731 if (!valid_rule(data, size, rule_ptr))
738 #ifdef CONFIG_CFG80211_REQUIRE_SIGNED_REGDB
739 static struct key *builtin_regdb_keys;
741 static void __init load_keys_from_buffer(const u8 *p, unsigned int buflen)
743 const u8 *end = p + buflen;
748 /* Each cert begins with an ASN.1 SEQUENCE tag and must be more
749 * than 256 bytes in size.
756 plen = (p[2] << 8) | p[3];
761 key = key_create_or_update(make_key_ref(builtin_regdb_keys, 1),
762 "asymmetric", NULL, p, plen,
763 ((KEY_POS_ALL & ~KEY_POS_SETATTR) |
764 KEY_USR_VIEW | KEY_USR_READ),
765 KEY_ALLOC_NOT_IN_QUOTA |
767 KEY_ALLOC_BYPASS_RESTRICTION);
769 pr_err("Problem loading in-kernel X.509 certificate (%ld)\n",
772 pr_notice("Loaded X.509 cert '%s'\n",
773 key_ref_to_ptr(key)->description);
782 pr_err("Problem parsing in-kernel X.509 certificate list\n");
785 static int __init load_builtin_regdb_keys(void)
788 keyring_alloc(".builtin_regdb_keys",
789 KUIDT_INIT(0), KGIDT_INIT(0), current_cred(),
790 ((KEY_POS_ALL & ~KEY_POS_SETATTR) |
791 KEY_USR_VIEW | KEY_USR_READ | KEY_USR_SEARCH),
792 KEY_ALLOC_NOT_IN_QUOTA, NULL, NULL);
793 if (IS_ERR(builtin_regdb_keys))
794 return PTR_ERR(builtin_regdb_keys);
796 pr_notice("Loading compiled-in X.509 certificates for regulatory database\n");
798 #ifdef CONFIG_CFG80211_USE_KERNEL_REGDB_KEYS
799 load_keys_from_buffer(shipped_regdb_certs, shipped_regdb_certs_len);
801 #ifdef CONFIG_CFG80211_EXTRA_REGDB_KEYDIR
802 if (CONFIG_CFG80211_EXTRA_REGDB_KEYDIR[0] != '\0')
803 load_keys_from_buffer(extra_regdb_certs, extra_regdb_certs_len);
809 MODULE_FIRMWARE("regulatory.db.p7s");
811 static bool regdb_has_valid_signature(const u8 *data, unsigned int size)
813 const struct firmware *sig;
816 if (request_firmware(&sig, "regulatory.db.p7s", ®_pdev->dev))
819 result = verify_pkcs7_signature(data, size, sig->data, sig->size,
821 VERIFYING_UNSPECIFIED_SIGNATURE,
824 release_firmware(sig);
829 static void free_regdb_keyring(void)
831 key_put(builtin_regdb_keys);
834 static int load_builtin_regdb_keys(void)
839 static bool regdb_has_valid_signature(const u8 *data, unsigned int size)
844 static void free_regdb_keyring(void)
847 #endif /* CONFIG_CFG80211_REQUIRE_SIGNED_REGDB */
849 static bool valid_regdb(const u8 *data, unsigned int size)
851 const struct fwdb_header *hdr = (void *)data;
852 const struct fwdb_country *country;
854 if (size < sizeof(*hdr))
857 if (hdr->magic != cpu_to_be32(FWDB_MAGIC))
860 if (hdr->version != cpu_to_be32(FWDB_VERSION))
863 if (!regdb_has_valid_signature(data, size))
866 country = &hdr->country[0];
867 while ((u8 *)(country + 1) <= data + size) {
868 if (!country->coll_ptr)
870 if (!valid_country(data, size, country))
878 static void set_wmm_rule(const struct fwdb_header *db,
879 const struct fwdb_country *country,
880 const struct fwdb_rule *rule,
881 struct ieee80211_reg_rule *rrule)
883 struct ieee80211_wmm_rule *wmm_rule = &rrule->wmm_rule;
884 struct fwdb_wmm_rule *wmm;
885 unsigned int i, wmm_ptr;
887 wmm_ptr = be16_to_cpu(rule->wmm_ptr) << 2;
888 wmm = (void *)((u8 *)db + wmm_ptr);
890 if (!valid_wmm(wmm)) {
891 pr_err("Invalid regulatory WMM rule %u-%u in domain %c%c\n",
892 be32_to_cpu(rule->start), be32_to_cpu(rule->end),
893 country->alpha2[0], country->alpha2[1]);
897 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
898 wmm_rule->client[i].cw_min =
899 ecw2cw((wmm->client[i].ecw & 0xf0) >> 4);
900 wmm_rule->client[i].cw_max = ecw2cw(wmm->client[i].ecw & 0x0f);
901 wmm_rule->client[i].aifsn = wmm->client[i].aifsn;
902 wmm_rule->client[i].cot =
903 1000 * be16_to_cpu(wmm->client[i].cot);
904 wmm_rule->ap[i].cw_min = ecw2cw((wmm->ap[i].ecw & 0xf0) >> 4);
905 wmm_rule->ap[i].cw_max = ecw2cw(wmm->ap[i].ecw & 0x0f);
906 wmm_rule->ap[i].aifsn = wmm->ap[i].aifsn;
907 wmm_rule->ap[i].cot = 1000 * be16_to_cpu(wmm->ap[i].cot);
910 rrule->has_wmm = true;
913 static int __regdb_query_wmm(const struct fwdb_header *db,
914 const struct fwdb_country *country, int freq,
915 struct ieee80211_reg_rule *rrule)
917 unsigned int ptr = be16_to_cpu(country->coll_ptr) << 2;
918 struct fwdb_collection *coll = (void *)((u8 *)db + ptr);
921 for (i = 0; i < coll->n_rules; i++) {
922 __be16 *rules_ptr = (void *)((u8 *)coll + ALIGN(coll->len, 2));
923 unsigned int rule_ptr = be16_to_cpu(rules_ptr[i]) << 2;
924 struct fwdb_rule *rule = (void *)((u8 *)db + rule_ptr);
926 if (rule->len < offsetofend(struct fwdb_rule, wmm_ptr))
929 if (freq >= KHZ_TO_MHZ(be32_to_cpu(rule->start)) &&
930 freq <= KHZ_TO_MHZ(be32_to_cpu(rule->end))) {
931 set_wmm_rule(db, country, rule, rrule);
939 int reg_query_regdb_wmm(char *alpha2, int freq, struct ieee80211_reg_rule *rule)
941 const struct fwdb_header *hdr = regdb;
942 const struct fwdb_country *country;
948 return PTR_ERR(regdb);
950 country = &hdr->country[0];
951 while (country->coll_ptr) {
952 if (alpha2_equal(alpha2, country->alpha2))
953 return __regdb_query_wmm(regdb, country, freq, rule);
960 EXPORT_SYMBOL(reg_query_regdb_wmm);
962 static int regdb_query_country(const struct fwdb_header *db,
963 const struct fwdb_country *country)
965 unsigned int ptr = be16_to_cpu(country->coll_ptr) << 2;
966 struct fwdb_collection *coll = (void *)((u8 *)db + ptr);
967 struct ieee80211_regdomain *regdom;
970 regdom = kzalloc(struct_size(regdom, reg_rules, coll->n_rules),
975 regdom->n_reg_rules = coll->n_rules;
976 regdom->alpha2[0] = country->alpha2[0];
977 regdom->alpha2[1] = country->alpha2[1];
978 regdom->dfs_region = coll->dfs_region;
980 for (i = 0; i < regdom->n_reg_rules; i++) {
981 __be16 *rules_ptr = (void *)((u8 *)coll + ALIGN(coll->len, 2));
982 unsigned int rule_ptr = be16_to_cpu(rules_ptr[i]) << 2;
983 struct fwdb_rule *rule = (void *)((u8 *)db + rule_ptr);
984 struct ieee80211_reg_rule *rrule = ®dom->reg_rules[i];
986 rrule->freq_range.start_freq_khz = be32_to_cpu(rule->start);
987 rrule->freq_range.end_freq_khz = be32_to_cpu(rule->end);
988 rrule->freq_range.max_bandwidth_khz = be32_to_cpu(rule->max_bw);
990 rrule->power_rule.max_antenna_gain = 0;
991 rrule->power_rule.max_eirp = be16_to_cpu(rule->max_eirp);
994 if (rule->flags & FWDB_FLAG_NO_OFDM)
995 rrule->flags |= NL80211_RRF_NO_OFDM;
996 if (rule->flags & FWDB_FLAG_NO_OUTDOOR)
997 rrule->flags |= NL80211_RRF_NO_OUTDOOR;
998 if (rule->flags & FWDB_FLAG_DFS)
999 rrule->flags |= NL80211_RRF_DFS;
1000 if (rule->flags & FWDB_FLAG_NO_IR)
1001 rrule->flags |= NL80211_RRF_NO_IR;
1002 if (rule->flags & FWDB_FLAG_AUTO_BW)
1003 rrule->flags |= NL80211_RRF_AUTO_BW;
1005 rrule->dfs_cac_ms = 0;
1007 /* handle optional data */
1008 if (rule->len >= offsetofend(struct fwdb_rule, cac_timeout))
1010 1000 * be16_to_cpu(rule->cac_timeout);
1011 if (rule->len >= offsetofend(struct fwdb_rule, wmm_ptr))
1012 set_wmm_rule(db, country, rule, rrule);
1015 return reg_schedule_apply(regdom);
1018 static int query_regdb(const char *alpha2)
1020 const struct fwdb_header *hdr = regdb;
1021 const struct fwdb_country *country;
1026 return PTR_ERR(regdb);
1028 country = &hdr->country[0];
1029 while (country->coll_ptr) {
1030 if (alpha2_equal(alpha2, country->alpha2))
1031 return regdb_query_country(regdb, country);
1038 static void regdb_fw_cb(const struct firmware *fw, void *context)
1041 bool restore = true;
1045 pr_info("failed to load regulatory.db\n");
1046 set_error = -ENODATA;
1047 } else if (!valid_regdb(fw->data, fw->size)) {
1048 pr_info("loaded regulatory.db is malformed or signature is missing/invalid\n");
1049 set_error = -EINVAL;
1053 if (regdb && !IS_ERR(regdb)) {
1054 /* negative case - a bug
1055 * positive case - can happen due to race in case of multiple cb's in
1056 * queue, due to usage of asynchronous callback
1058 * Either case, just restore and free new db.
1060 } else if (set_error) {
1061 regdb = ERR_PTR(set_error);
1063 db = kmemdup(fw->data, fw->size, GFP_KERNEL);
1066 restore = context && query_regdb(context);
1073 restore_regulatory_settings(true, false);
1079 release_firmware(fw);
1082 MODULE_FIRMWARE("regulatory.db");
1084 static int query_regdb_file(const char *alpha2)
1091 return query_regdb(alpha2);
1093 alpha2 = kmemdup(alpha2, 2, GFP_KERNEL);
1097 err = request_firmware_nowait(THIS_MODULE, true, "regulatory.db",
1098 ®_pdev->dev, GFP_KERNEL,
1099 (void *)alpha2, regdb_fw_cb);
1106 int reg_reload_regdb(void)
1108 const struct firmware *fw;
1112 err = request_firmware(&fw, "regulatory.db", ®_pdev->dev);
1116 if (!valid_regdb(fw->data, fw->size)) {
1121 db = kmemdup(fw->data, fw->size, GFP_KERNEL);
1128 if (!IS_ERR_OR_NULL(regdb))
1134 release_firmware(fw);
1138 static bool reg_query_database(struct regulatory_request *request)
1140 if (query_regdb_file(request->alpha2) == 0)
1143 if (call_crda(request->alpha2) == 0)
1149 bool reg_is_valid_request(const char *alpha2)
1151 struct regulatory_request *lr = get_last_request();
1153 if (!lr || lr->processed)
1156 return alpha2_equal(lr->alpha2, alpha2);
1159 static const struct ieee80211_regdomain *reg_get_regdomain(struct wiphy *wiphy)
1161 struct regulatory_request *lr = get_last_request();
1164 * Follow the driver's regulatory domain, if present, unless a country
1165 * IE has been processed or a user wants to help complaince further
1167 if (lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE &&
1168 lr->initiator != NL80211_REGDOM_SET_BY_USER &&
1170 return get_wiphy_regdom(wiphy);
1172 return get_cfg80211_regdom();
1176 reg_get_max_bandwidth_from_range(const struct ieee80211_regdomain *rd,
1177 const struct ieee80211_reg_rule *rule)
1179 const struct ieee80211_freq_range *freq_range = &rule->freq_range;
1180 const struct ieee80211_freq_range *freq_range_tmp;
1181 const struct ieee80211_reg_rule *tmp;
1182 u32 start_freq, end_freq, idx, no;
1184 for (idx = 0; idx < rd->n_reg_rules; idx++)
1185 if (rule == &rd->reg_rules[idx])
1188 if (idx == rd->n_reg_rules)
1191 /* get start_freq */
1195 tmp = &rd->reg_rules[--no];
1196 freq_range_tmp = &tmp->freq_range;
1198 if (freq_range_tmp->end_freq_khz < freq_range->start_freq_khz)
1201 freq_range = freq_range_tmp;
1204 start_freq = freq_range->start_freq_khz;
1207 freq_range = &rule->freq_range;
1210 while (no < rd->n_reg_rules - 1) {
1211 tmp = &rd->reg_rules[++no];
1212 freq_range_tmp = &tmp->freq_range;
1214 if (freq_range_tmp->start_freq_khz > freq_range->end_freq_khz)
1217 freq_range = freq_range_tmp;
1220 end_freq = freq_range->end_freq_khz;
1222 return end_freq - start_freq;
1225 unsigned int reg_get_max_bandwidth(const struct ieee80211_regdomain *rd,
1226 const struct ieee80211_reg_rule *rule)
1228 unsigned int bw = reg_get_max_bandwidth_from_range(rd, rule);
1230 if (rule->flags & NL80211_RRF_NO_160MHZ)
1231 bw = min_t(unsigned int, bw, MHZ_TO_KHZ(80));
1232 if (rule->flags & NL80211_RRF_NO_80MHZ)
1233 bw = min_t(unsigned int, bw, MHZ_TO_KHZ(40));
1236 * HT40+/HT40- limits are handled per-channel. Only limit BW if both
1239 if (rule->flags & NL80211_RRF_NO_HT40MINUS &&
1240 rule->flags & NL80211_RRF_NO_HT40PLUS)
1241 bw = min_t(unsigned int, bw, MHZ_TO_KHZ(20));
1246 /* Sanity check on a regulatory rule */
1247 static bool is_valid_reg_rule(const struct ieee80211_reg_rule *rule)
1249 const struct ieee80211_freq_range *freq_range = &rule->freq_range;
1252 if (freq_range->start_freq_khz <= 0 || freq_range->end_freq_khz <= 0)
1255 if (freq_range->start_freq_khz > freq_range->end_freq_khz)
1258 freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz;
1260 if (freq_range->end_freq_khz <= freq_range->start_freq_khz ||
1261 freq_range->max_bandwidth_khz > freq_diff)
1267 static bool is_valid_rd(const struct ieee80211_regdomain *rd)
1269 const struct ieee80211_reg_rule *reg_rule = NULL;
1272 if (!rd->n_reg_rules)
1275 if (WARN_ON(rd->n_reg_rules > NL80211_MAX_SUPP_REG_RULES))
1278 for (i = 0; i < rd->n_reg_rules; i++) {
1279 reg_rule = &rd->reg_rules[i];
1280 if (!is_valid_reg_rule(reg_rule))
1288 * freq_in_rule_band - tells us if a frequency is in a frequency band
1289 * @freq_range: frequency rule we want to query
1290 * @freq_khz: frequency we are inquiring about
1292 * This lets us know if a specific frequency rule is or is not relevant to
1293 * a specific frequency's band. Bands are device specific and artificial
1294 * definitions (the "2.4 GHz band", the "5 GHz band" and the "60GHz band"),
1295 * however it is safe for now to assume that a frequency rule should not be
1296 * part of a frequency's band if the start freq or end freq are off by more
1297 * than 2 GHz for the 2.4 and 5 GHz bands, and by more than 20 GHz for the
1299 * This resolution can be lowered and should be considered as we add
1300 * regulatory rule support for other "bands".
1302 static bool freq_in_rule_band(const struct ieee80211_freq_range *freq_range,
1305 #define ONE_GHZ_IN_KHZ 1000000
1307 * From 802.11ad: directional multi-gigabit (DMG):
1308 * Pertaining to operation in a frequency band containing a channel
1309 * with the Channel starting frequency above 45 GHz.
1311 u32 limit = freq_khz > 45 * ONE_GHZ_IN_KHZ ?
1312 20 * ONE_GHZ_IN_KHZ : 2 * ONE_GHZ_IN_KHZ;
1313 if (abs(freq_khz - freq_range->start_freq_khz) <= limit)
1315 if (abs(freq_khz - freq_range->end_freq_khz) <= limit)
1318 #undef ONE_GHZ_IN_KHZ
1322 * Later on we can perhaps use the more restrictive DFS
1323 * region but we don't have information for that yet so
1324 * for now simply disallow conflicts.
1326 static enum nl80211_dfs_regions
1327 reg_intersect_dfs_region(const enum nl80211_dfs_regions dfs_region1,
1328 const enum nl80211_dfs_regions dfs_region2)
1330 if (dfs_region1 != dfs_region2)
1331 return NL80211_DFS_UNSET;
1335 static void reg_wmm_rules_intersect(const struct ieee80211_wmm_ac *wmm_ac1,
1336 const struct ieee80211_wmm_ac *wmm_ac2,
1337 struct ieee80211_wmm_ac *intersect)
1339 intersect->cw_min = max_t(u16, wmm_ac1->cw_min, wmm_ac2->cw_min);
1340 intersect->cw_max = max_t(u16, wmm_ac1->cw_max, wmm_ac2->cw_max);
1341 intersect->cot = min_t(u16, wmm_ac1->cot, wmm_ac2->cot);
1342 intersect->aifsn = max_t(u8, wmm_ac1->aifsn, wmm_ac2->aifsn);
1346 * Helper for regdom_intersect(), this does the real
1347 * mathematical intersection fun
1349 static int reg_rules_intersect(const struct ieee80211_regdomain *rd1,
1350 const struct ieee80211_regdomain *rd2,
1351 const struct ieee80211_reg_rule *rule1,
1352 const struct ieee80211_reg_rule *rule2,
1353 struct ieee80211_reg_rule *intersected_rule)
1355 const struct ieee80211_freq_range *freq_range1, *freq_range2;
1356 struct ieee80211_freq_range *freq_range;
1357 const struct ieee80211_power_rule *power_rule1, *power_rule2;
1358 struct ieee80211_power_rule *power_rule;
1359 const struct ieee80211_wmm_rule *wmm_rule1, *wmm_rule2;
1360 struct ieee80211_wmm_rule *wmm_rule;
1361 u32 freq_diff, max_bandwidth1, max_bandwidth2;
1363 freq_range1 = &rule1->freq_range;
1364 freq_range2 = &rule2->freq_range;
1365 freq_range = &intersected_rule->freq_range;
1367 power_rule1 = &rule1->power_rule;
1368 power_rule2 = &rule2->power_rule;
1369 power_rule = &intersected_rule->power_rule;
1371 wmm_rule1 = &rule1->wmm_rule;
1372 wmm_rule2 = &rule2->wmm_rule;
1373 wmm_rule = &intersected_rule->wmm_rule;
1375 freq_range->start_freq_khz = max(freq_range1->start_freq_khz,
1376 freq_range2->start_freq_khz);
1377 freq_range->end_freq_khz = min(freq_range1->end_freq_khz,
1378 freq_range2->end_freq_khz);
1380 max_bandwidth1 = freq_range1->max_bandwidth_khz;
1381 max_bandwidth2 = freq_range2->max_bandwidth_khz;
1383 if (rule1->flags & NL80211_RRF_AUTO_BW)
1384 max_bandwidth1 = reg_get_max_bandwidth(rd1, rule1);
1385 if (rule2->flags & NL80211_RRF_AUTO_BW)
1386 max_bandwidth2 = reg_get_max_bandwidth(rd2, rule2);
1388 freq_range->max_bandwidth_khz = min(max_bandwidth1, max_bandwidth2);
1390 intersected_rule->flags = rule1->flags | rule2->flags;
1393 * In case NL80211_RRF_AUTO_BW requested for both rules
1394 * set AUTO_BW in intersected rule also. Next we will
1395 * calculate BW correctly in handle_channel function.
1396 * In other case remove AUTO_BW flag while we calculate
1397 * maximum bandwidth correctly and auto calculation is
1400 if ((rule1->flags & NL80211_RRF_AUTO_BW) &&
1401 (rule2->flags & NL80211_RRF_AUTO_BW))
1402 intersected_rule->flags |= NL80211_RRF_AUTO_BW;
1404 intersected_rule->flags &= ~NL80211_RRF_AUTO_BW;
1406 freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz;
1407 if (freq_range->max_bandwidth_khz > freq_diff)
1408 freq_range->max_bandwidth_khz = freq_diff;
1410 power_rule->max_eirp = min(power_rule1->max_eirp,
1411 power_rule2->max_eirp);
1412 power_rule->max_antenna_gain = min(power_rule1->max_antenna_gain,
1413 power_rule2->max_antenna_gain);
1415 intersected_rule->dfs_cac_ms = max(rule1->dfs_cac_ms,
1418 if (rule1->has_wmm && rule2->has_wmm) {
1421 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1422 reg_wmm_rules_intersect(&wmm_rule1->client[ac],
1423 &wmm_rule2->client[ac],
1424 &wmm_rule->client[ac]);
1425 reg_wmm_rules_intersect(&wmm_rule1->ap[ac],
1430 intersected_rule->has_wmm = true;
1431 } else if (rule1->has_wmm) {
1432 *wmm_rule = *wmm_rule1;
1433 intersected_rule->has_wmm = true;
1434 } else if (rule2->has_wmm) {
1435 *wmm_rule = *wmm_rule2;
1436 intersected_rule->has_wmm = true;
1438 intersected_rule->has_wmm = false;
1441 if (!is_valid_reg_rule(intersected_rule))
1447 /* check whether old rule contains new rule */
1448 static bool rule_contains(struct ieee80211_reg_rule *r1,
1449 struct ieee80211_reg_rule *r2)
1451 /* for simplicity, currently consider only same flags */
1452 if (r1->flags != r2->flags)
1455 /* verify r1 is more restrictive */
1456 if ((r1->power_rule.max_antenna_gain >
1457 r2->power_rule.max_antenna_gain) ||
1458 r1->power_rule.max_eirp > r2->power_rule.max_eirp)
1461 /* make sure r2's range is contained within r1 */
1462 if (r1->freq_range.start_freq_khz > r2->freq_range.start_freq_khz ||
1463 r1->freq_range.end_freq_khz < r2->freq_range.end_freq_khz)
1466 /* and finally verify that r1.max_bw >= r2.max_bw */
1467 if (r1->freq_range.max_bandwidth_khz <
1468 r2->freq_range.max_bandwidth_khz)
1474 /* add or extend current rules. do nothing if rule is already contained */
1475 static void add_rule(struct ieee80211_reg_rule *rule,
1476 struct ieee80211_reg_rule *reg_rules, u32 *n_rules)
1478 struct ieee80211_reg_rule *tmp_rule;
1481 for (i = 0; i < *n_rules; i++) {
1482 tmp_rule = ®_rules[i];
1483 /* rule is already contained - do nothing */
1484 if (rule_contains(tmp_rule, rule))
1487 /* extend rule if possible */
1488 if (rule_contains(rule, tmp_rule)) {
1489 memcpy(tmp_rule, rule, sizeof(*rule));
1494 memcpy(®_rules[*n_rules], rule, sizeof(*rule));
1499 * regdom_intersect - do the intersection between two regulatory domains
1500 * @rd1: first regulatory domain
1501 * @rd2: second regulatory domain
1503 * Use this function to get the intersection between two regulatory domains.
1504 * Once completed we will mark the alpha2 for the rd as intersected, "98",
1505 * as no one single alpha2 can represent this regulatory domain.
1507 * Returns a pointer to the regulatory domain structure which will hold the
1508 * resulting intersection of rules between rd1 and rd2. We will
1509 * kzalloc() this structure for you.
1511 static struct ieee80211_regdomain *
1512 regdom_intersect(const struct ieee80211_regdomain *rd1,
1513 const struct ieee80211_regdomain *rd2)
1517 unsigned int num_rules = 0;
1518 const struct ieee80211_reg_rule *rule1, *rule2;
1519 struct ieee80211_reg_rule intersected_rule;
1520 struct ieee80211_regdomain *rd;
1526 * First we get a count of the rules we'll need, then we actually
1527 * build them. This is to so we can malloc() and free() a
1528 * regdomain once. The reason we use reg_rules_intersect() here
1529 * is it will return -EINVAL if the rule computed makes no sense.
1530 * All rules that do check out OK are valid.
1533 for (x = 0; x < rd1->n_reg_rules; x++) {
1534 rule1 = &rd1->reg_rules[x];
1535 for (y = 0; y < rd2->n_reg_rules; y++) {
1536 rule2 = &rd2->reg_rules[y];
1537 if (!reg_rules_intersect(rd1, rd2, rule1, rule2,
1546 rd = kzalloc(struct_size(rd, reg_rules, num_rules), GFP_KERNEL);
1550 for (x = 0; x < rd1->n_reg_rules; x++) {
1551 rule1 = &rd1->reg_rules[x];
1552 for (y = 0; y < rd2->n_reg_rules; y++) {
1553 rule2 = &rd2->reg_rules[y];
1554 r = reg_rules_intersect(rd1, rd2, rule1, rule2,
1557 * No need to memset here the intersected rule here as
1558 * we're not using the stack anymore
1563 add_rule(&intersected_rule, rd->reg_rules,
1568 rd->alpha2[0] = '9';
1569 rd->alpha2[1] = '8';
1570 rd->dfs_region = reg_intersect_dfs_region(rd1->dfs_region,
1577 * XXX: add support for the rest of enum nl80211_reg_rule_flags, we may
1578 * want to just have the channel structure use these
1580 static u32 map_regdom_flags(u32 rd_flags)
1582 u32 channel_flags = 0;
1583 if (rd_flags & NL80211_RRF_NO_IR_ALL)
1584 channel_flags |= IEEE80211_CHAN_NO_IR;
1585 if (rd_flags & NL80211_RRF_DFS)
1586 channel_flags |= IEEE80211_CHAN_RADAR;
1587 if (rd_flags & NL80211_RRF_NO_OFDM)
1588 channel_flags |= IEEE80211_CHAN_NO_OFDM;
1589 if (rd_flags & NL80211_RRF_NO_OUTDOOR)
1590 channel_flags |= IEEE80211_CHAN_INDOOR_ONLY;
1591 if (rd_flags & NL80211_RRF_IR_CONCURRENT)
1592 channel_flags |= IEEE80211_CHAN_IR_CONCURRENT;
1593 if (rd_flags & NL80211_RRF_NO_HT40MINUS)
1594 channel_flags |= IEEE80211_CHAN_NO_HT40MINUS;
1595 if (rd_flags & NL80211_RRF_NO_HT40PLUS)
1596 channel_flags |= IEEE80211_CHAN_NO_HT40PLUS;
1597 if (rd_flags & NL80211_RRF_NO_80MHZ)
1598 channel_flags |= IEEE80211_CHAN_NO_80MHZ;
1599 if (rd_flags & NL80211_RRF_NO_160MHZ)
1600 channel_flags |= IEEE80211_CHAN_NO_160MHZ;
1601 if (rd_flags & NL80211_RRF_NO_HE)
1602 channel_flags |= IEEE80211_CHAN_NO_HE;
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;
1769 static void handle_channel_single_rule(struct wiphy *wiphy,
1770 enum nl80211_reg_initiator initiator,
1771 struct ieee80211_channel *chan,
1773 struct regulatory_request *lr,
1774 struct wiphy *request_wiphy,
1775 const struct ieee80211_reg_rule *reg_rule)
1778 const struct ieee80211_power_rule *power_rule = NULL;
1779 const struct ieee80211_regdomain *regd;
1781 regd = reg_get_regdomain(wiphy);
1783 power_rule = ®_rule->power_rule;
1784 bw_flags = reg_rule_to_chan_bw_flags(regd, reg_rule, chan);
1786 if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER &&
1787 request_wiphy && request_wiphy == wiphy &&
1788 request_wiphy->regulatory_flags & REGULATORY_STRICT_REG) {
1790 * This guarantees the driver's requested regulatory domain
1791 * will always be used as a base for further regulatory
1794 chan->flags = chan->orig_flags =
1795 map_regdom_flags(reg_rule->flags) | bw_flags;
1796 chan->max_antenna_gain = chan->orig_mag =
1797 (int) MBI_TO_DBI(power_rule->max_antenna_gain);
1798 chan->max_reg_power = chan->max_power = chan->orig_mpwr =
1799 (int) MBM_TO_DBM(power_rule->max_eirp);
1801 if (chan->flags & IEEE80211_CHAN_RADAR) {
1802 chan->dfs_cac_ms = IEEE80211_DFS_MIN_CAC_TIME_MS;
1803 if (reg_rule->dfs_cac_ms)
1804 chan->dfs_cac_ms = reg_rule->dfs_cac_ms;
1810 chan->dfs_state = NL80211_DFS_USABLE;
1811 chan->dfs_state_entered = jiffies;
1813 chan->beacon_found = false;
1814 chan->flags = flags | bw_flags | map_regdom_flags(reg_rule->flags);
1815 chan->max_antenna_gain =
1816 min_t(int, chan->orig_mag,
1817 MBI_TO_DBI(power_rule->max_antenna_gain));
1818 chan->max_reg_power = (int) MBM_TO_DBM(power_rule->max_eirp);
1820 if (chan->flags & IEEE80211_CHAN_RADAR) {
1821 if (reg_rule->dfs_cac_ms)
1822 chan->dfs_cac_ms = reg_rule->dfs_cac_ms;
1824 chan->dfs_cac_ms = IEEE80211_DFS_MIN_CAC_TIME_MS;
1827 if (chan->orig_mpwr) {
1829 * Devices that use REGULATORY_COUNTRY_IE_FOLLOW_POWER
1830 * will always follow the passed country IE power settings.
1832 if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE &&
1833 wiphy->regulatory_flags & REGULATORY_COUNTRY_IE_FOLLOW_POWER)
1834 chan->max_power = chan->max_reg_power;
1836 chan->max_power = min(chan->orig_mpwr,
1837 chan->max_reg_power);
1839 chan->max_power = chan->max_reg_power;
1842 static void handle_channel_adjacent_rules(struct wiphy *wiphy,
1843 enum nl80211_reg_initiator initiator,
1844 struct ieee80211_channel *chan,
1846 struct regulatory_request *lr,
1847 struct wiphy *request_wiphy,
1848 const struct ieee80211_reg_rule *rrule1,
1849 const struct ieee80211_reg_rule *rrule2,
1850 struct ieee80211_freq_range *comb_range)
1854 const struct ieee80211_power_rule *power_rule1 = NULL;
1855 const struct ieee80211_power_rule *power_rule2 = NULL;
1856 const struct ieee80211_regdomain *regd;
1858 regd = reg_get_regdomain(wiphy);
1860 power_rule1 = &rrule1->power_rule;
1861 power_rule2 = &rrule2->power_rule;
1862 bw_flags1 = reg_rule_to_chan_bw_flags(regd, rrule1, chan);
1863 bw_flags2 = reg_rule_to_chan_bw_flags(regd, rrule2, chan);
1865 if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER &&
1866 request_wiphy && request_wiphy == wiphy &&
1867 request_wiphy->regulatory_flags & REGULATORY_STRICT_REG) {
1868 /* This guarantees the driver's requested regulatory domain
1869 * will always be used as a base for further regulatory
1873 map_regdom_flags(rrule1->flags) |
1874 map_regdom_flags(rrule2->flags) |
1877 chan->orig_flags = chan->flags;
1878 chan->max_antenna_gain =
1879 min_t(int, MBI_TO_DBI(power_rule1->max_antenna_gain),
1880 MBI_TO_DBI(power_rule2->max_antenna_gain));
1881 chan->orig_mag = chan->max_antenna_gain;
1882 chan->max_reg_power =
1883 min_t(int, MBM_TO_DBM(power_rule1->max_eirp),
1884 MBM_TO_DBM(power_rule2->max_eirp));
1885 chan->max_power = chan->max_reg_power;
1886 chan->orig_mpwr = chan->max_reg_power;
1888 if (chan->flags & IEEE80211_CHAN_RADAR) {
1889 chan->dfs_cac_ms = IEEE80211_DFS_MIN_CAC_TIME_MS;
1890 if (rrule1->dfs_cac_ms || rrule2->dfs_cac_ms)
1891 chan->dfs_cac_ms = max_t(unsigned int,
1893 rrule2->dfs_cac_ms);
1899 chan->dfs_state = NL80211_DFS_USABLE;
1900 chan->dfs_state_entered = jiffies;
1902 chan->beacon_found = false;
1903 chan->flags = flags | bw_flags1 | bw_flags2 |
1904 map_regdom_flags(rrule1->flags) |
1905 map_regdom_flags(rrule2->flags);
1907 /* reg_rule_to_chan_bw_flags may forbids 10 and forbids 20 MHz
1908 * (otherwise no adj. rule case), recheck therefore
1910 if (cfg80211_does_bw_fit_range(comb_range,
1911 ieee80211_channel_to_khz(chan),
1913 chan->flags &= ~IEEE80211_CHAN_NO_10MHZ;
1914 if (cfg80211_does_bw_fit_range(comb_range,
1915 ieee80211_channel_to_khz(chan),
1917 chan->flags &= ~IEEE80211_CHAN_NO_20MHZ;
1919 chan->max_antenna_gain =
1920 min_t(int, chan->orig_mag,
1922 MBI_TO_DBI(power_rule1->max_antenna_gain),
1923 MBI_TO_DBI(power_rule2->max_antenna_gain)));
1924 chan->max_reg_power = min_t(int,
1925 MBM_TO_DBM(power_rule1->max_eirp),
1926 MBM_TO_DBM(power_rule2->max_eirp));
1928 if (chan->flags & IEEE80211_CHAN_RADAR) {
1929 if (rrule1->dfs_cac_ms || rrule2->dfs_cac_ms)
1930 chan->dfs_cac_ms = max_t(unsigned int,
1932 rrule2->dfs_cac_ms);
1934 chan->dfs_cac_ms = IEEE80211_DFS_MIN_CAC_TIME_MS;
1937 if (chan->orig_mpwr) {
1938 /* Devices that use REGULATORY_COUNTRY_IE_FOLLOW_POWER
1939 * will always follow the passed country IE power settings.
1941 if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE &&
1942 wiphy->regulatory_flags & REGULATORY_COUNTRY_IE_FOLLOW_POWER)
1943 chan->max_power = chan->max_reg_power;
1945 chan->max_power = min(chan->orig_mpwr,
1946 chan->max_reg_power);
1948 chan->max_power = chan->max_reg_power;
1952 /* Note that right now we assume the desired channel bandwidth
1953 * is always 20 MHz for each individual channel (HT40 uses 20 MHz
1954 * per channel, the primary and the extension channel).
1956 static void handle_channel(struct wiphy *wiphy,
1957 enum nl80211_reg_initiator initiator,
1958 struct ieee80211_channel *chan)
1960 const u32 orig_chan_freq = ieee80211_channel_to_khz(chan);
1961 struct regulatory_request *lr = get_last_request();
1962 struct wiphy *request_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx);
1963 const struct ieee80211_reg_rule *rrule = NULL;
1964 const struct ieee80211_reg_rule *rrule1 = NULL;
1965 const struct ieee80211_reg_rule *rrule2 = NULL;
1967 u32 flags = chan->orig_flags;
1969 rrule = freq_reg_info(wiphy, orig_chan_freq);
1970 if (IS_ERR(rrule)) {
1971 /* check for adjacent match, therefore get rules for
1972 * chan - 20 MHz and chan + 20 MHz and test
1973 * if reg rules are adjacent
1975 rrule1 = freq_reg_info(wiphy,
1976 orig_chan_freq - MHZ_TO_KHZ(20));
1977 rrule2 = freq_reg_info(wiphy,
1978 orig_chan_freq + MHZ_TO_KHZ(20));
1979 if (!IS_ERR(rrule1) && !IS_ERR(rrule2)) {
1980 struct ieee80211_freq_range comb_range;
1982 if (rrule1->freq_range.end_freq_khz !=
1983 rrule2->freq_range.start_freq_khz)
1986 comb_range.start_freq_khz =
1987 rrule1->freq_range.start_freq_khz;
1988 comb_range.end_freq_khz =
1989 rrule2->freq_range.end_freq_khz;
1990 comb_range.max_bandwidth_khz =
1992 rrule1->freq_range.max_bandwidth_khz,
1993 rrule2->freq_range.max_bandwidth_khz);
1995 if (!cfg80211_does_bw_fit_range(&comb_range,
2000 handle_channel_adjacent_rules(wiphy, initiator, chan,
2001 flags, lr, request_wiphy,
2008 /* We will disable all channels that do not match our
2009 * received regulatory rule unless the hint is coming
2010 * from a Country IE and the Country IE had no information
2011 * about a band. The IEEE 802.11 spec allows for an AP
2012 * to send only a subset of the regulatory rules allowed,
2013 * so an AP in the US that only supports 2.4 GHz may only send
2014 * a country IE with information for the 2.4 GHz band
2015 * while 5 GHz is still supported.
2017 if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE &&
2018 PTR_ERR(rrule) == -ERANGE)
2021 if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER &&
2022 request_wiphy && request_wiphy == wiphy &&
2023 request_wiphy->regulatory_flags & REGULATORY_STRICT_REG) {
2024 pr_debug("Disabling freq %d.%03d MHz for good\n",
2025 chan->center_freq, chan->freq_offset);
2026 chan->orig_flags |= IEEE80211_CHAN_DISABLED;
2027 chan->flags = chan->orig_flags;
2029 pr_debug("Disabling freq %d.%03d MHz\n",
2030 chan->center_freq, chan->freq_offset);
2031 chan->flags |= IEEE80211_CHAN_DISABLED;
2036 handle_channel_single_rule(wiphy, initiator, chan, flags, lr,
2037 request_wiphy, rrule);
2040 static void handle_band(struct wiphy *wiphy,
2041 enum nl80211_reg_initiator initiator,
2042 struct ieee80211_supported_band *sband)
2049 for (i = 0; i < sband->n_channels; i++)
2050 handle_channel(wiphy, initiator, &sband->channels[i]);
2053 static bool reg_request_cell_base(struct regulatory_request *request)
2055 if (request->initiator != NL80211_REGDOM_SET_BY_USER)
2057 return request->user_reg_hint_type == NL80211_USER_REG_HINT_CELL_BASE;
2060 bool reg_last_request_cell_base(void)
2062 return reg_request_cell_base(get_last_request());
2065 #ifdef CONFIG_CFG80211_REG_CELLULAR_HINTS
2066 /* Core specific check */
2067 static enum reg_request_treatment
2068 reg_ignore_cell_hint(struct regulatory_request *pending_request)
2070 struct regulatory_request *lr = get_last_request();
2072 if (!reg_num_devs_support_basehint)
2073 return REG_REQ_IGNORE;
2075 if (reg_request_cell_base(lr) &&
2076 !regdom_changes(pending_request->alpha2))
2077 return REG_REQ_ALREADY_SET;
2082 /* Device specific check */
2083 static bool reg_dev_ignore_cell_hint(struct wiphy *wiphy)
2085 return !(wiphy->features & NL80211_FEATURE_CELL_BASE_REG_HINTS);
2088 static enum reg_request_treatment
2089 reg_ignore_cell_hint(struct regulatory_request *pending_request)
2091 return REG_REQ_IGNORE;
2094 static bool reg_dev_ignore_cell_hint(struct wiphy *wiphy)
2100 static bool wiphy_strict_alpha2_regd(struct wiphy *wiphy)
2102 if (wiphy->regulatory_flags & REGULATORY_STRICT_REG &&
2103 !(wiphy->regulatory_flags & REGULATORY_CUSTOM_REG))
2108 static bool ignore_reg_update(struct wiphy *wiphy,
2109 enum nl80211_reg_initiator initiator)
2111 struct regulatory_request *lr = get_last_request();
2113 if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED)
2117 pr_debug("Ignoring regulatory request set by %s since last_request is not set\n",
2118 reg_initiator_name(initiator));
2122 if (initiator == NL80211_REGDOM_SET_BY_CORE &&
2123 wiphy->regulatory_flags & REGULATORY_CUSTOM_REG) {
2124 pr_debug("Ignoring regulatory request set by %s since the driver uses its own custom regulatory domain\n",
2125 reg_initiator_name(initiator));
2130 * wiphy->regd will be set once the device has its own
2131 * desired regulatory domain set
2133 if (wiphy_strict_alpha2_regd(wiphy) && !wiphy->regd &&
2134 initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE &&
2135 !is_world_regdom(lr->alpha2)) {
2136 pr_debug("Ignoring regulatory request set by %s since the driver requires its own regulatory domain to be set first\n",
2137 reg_initiator_name(initiator));
2141 if (reg_request_cell_base(lr))
2142 return reg_dev_ignore_cell_hint(wiphy);
2147 static bool reg_is_world_roaming(struct wiphy *wiphy)
2149 const struct ieee80211_regdomain *cr = get_cfg80211_regdom();
2150 const struct ieee80211_regdomain *wr = get_wiphy_regdom(wiphy);
2151 struct regulatory_request *lr = get_last_request();
2153 if (is_world_regdom(cr->alpha2) || (wr && is_world_regdom(wr->alpha2)))
2156 if (lr && lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE &&
2157 wiphy->regulatory_flags & REGULATORY_CUSTOM_REG)
2163 static void handle_reg_beacon(struct wiphy *wiphy, unsigned int chan_idx,
2164 struct reg_beacon *reg_beacon)
2166 struct ieee80211_supported_band *sband;
2167 struct ieee80211_channel *chan;
2168 bool channel_changed = false;
2169 struct ieee80211_channel chan_before;
2171 sband = wiphy->bands[reg_beacon->chan.band];
2172 chan = &sband->channels[chan_idx];
2174 if (likely(!ieee80211_channel_equal(chan, ®_beacon->chan)))
2177 if (chan->beacon_found)
2180 chan->beacon_found = true;
2182 if (!reg_is_world_roaming(wiphy))
2185 if (wiphy->regulatory_flags & REGULATORY_DISABLE_BEACON_HINTS)
2188 chan_before = *chan;
2190 if (chan->flags & IEEE80211_CHAN_NO_IR) {
2191 chan->flags &= ~IEEE80211_CHAN_NO_IR;
2192 channel_changed = true;
2195 if (channel_changed)
2196 nl80211_send_beacon_hint_event(wiphy, &chan_before, chan);
2200 * Called when a scan on a wiphy finds a beacon on
2203 static void wiphy_update_new_beacon(struct wiphy *wiphy,
2204 struct reg_beacon *reg_beacon)
2207 struct ieee80211_supported_band *sband;
2209 if (!wiphy->bands[reg_beacon->chan.band])
2212 sband = wiphy->bands[reg_beacon->chan.band];
2214 for (i = 0; i < sband->n_channels; i++)
2215 handle_reg_beacon(wiphy, i, reg_beacon);
2219 * Called upon reg changes or a new wiphy is added
2221 static void wiphy_update_beacon_reg(struct wiphy *wiphy)
2224 struct ieee80211_supported_band *sband;
2225 struct reg_beacon *reg_beacon;
2227 list_for_each_entry(reg_beacon, ®_beacon_list, list) {
2228 if (!wiphy->bands[reg_beacon->chan.band])
2230 sband = wiphy->bands[reg_beacon->chan.band];
2231 for (i = 0; i < sband->n_channels; i++)
2232 handle_reg_beacon(wiphy, i, reg_beacon);
2236 /* Reap the advantages of previously found beacons */
2237 static void reg_process_beacons(struct wiphy *wiphy)
2240 * Means we are just firing up cfg80211, so no beacons would
2241 * have been processed yet.
2245 wiphy_update_beacon_reg(wiphy);
2248 static bool is_ht40_allowed(struct ieee80211_channel *chan)
2252 if (chan->flags & IEEE80211_CHAN_DISABLED)
2254 /* This would happen when regulatory rules disallow HT40 completely */
2255 if ((chan->flags & IEEE80211_CHAN_NO_HT40) == IEEE80211_CHAN_NO_HT40)
2260 static void reg_process_ht_flags_channel(struct wiphy *wiphy,
2261 struct ieee80211_channel *channel)
2263 struct ieee80211_supported_band *sband = wiphy->bands[channel->band];
2264 struct ieee80211_channel *channel_before = NULL, *channel_after = NULL;
2265 const struct ieee80211_regdomain *regd;
2269 if (!is_ht40_allowed(channel)) {
2270 channel->flags |= IEEE80211_CHAN_NO_HT40;
2275 * We need to ensure the extension channels exist to
2276 * be able to use HT40- or HT40+, this finds them (or not)
2278 for (i = 0; i < sband->n_channels; i++) {
2279 struct ieee80211_channel *c = &sband->channels[i];
2281 if (c->center_freq == (channel->center_freq - 20))
2283 if (c->center_freq == (channel->center_freq + 20))
2288 regd = get_wiphy_regdom(wiphy);
2290 const struct ieee80211_reg_rule *reg_rule =
2291 freq_reg_info_regd(MHZ_TO_KHZ(channel->center_freq),
2292 regd, MHZ_TO_KHZ(20));
2294 if (!IS_ERR(reg_rule))
2295 flags = reg_rule->flags;
2299 * Please note that this assumes target bandwidth is 20 MHz,
2300 * if that ever changes we also need to change the below logic
2301 * to include that as well.
2303 if (!is_ht40_allowed(channel_before) ||
2304 flags & NL80211_RRF_NO_HT40MINUS)
2305 channel->flags |= IEEE80211_CHAN_NO_HT40MINUS;
2307 channel->flags &= ~IEEE80211_CHAN_NO_HT40MINUS;
2309 if (!is_ht40_allowed(channel_after) ||
2310 flags & NL80211_RRF_NO_HT40PLUS)
2311 channel->flags |= IEEE80211_CHAN_NO_HT40PLUS;
2313 channel->flags &= ~IEEE80211_CHAN_NO_HT40PLUS;
2316 static void reg_process_ht_flags_band(struct wiphy *wiphy,
2317 struct ieee80211_supported_band *sband)
2324 for (i = 0; i < sband->n_channels; i++)
2325 reg_process_ht_flags_channel(wiphy, &sband->channels[i]);
2328 static void reg_process_ht_flags(struct wiphy *wiphy)
2330 enum nl80211_band band;
2335 for (band = 0; band < NUM_NL80211_BANDS; band++)
2336 reg_process_ht_flags_band(wiphy, wiphy->bands[band]);
2339 static void reg_call_notifier(struct wiphy *wiphy,
2340 struct regulatory_request *request)
2342 if (wiphy->reg_notifier)
2343 wiphy->reg_notifier(wiphy, request);
2346 static bool reg_wdev_chan_valid(struct wiphy *wiphy, struct wireless_dev *wdev)
2348 struct cfg80211_chan_def chandef = {};
2349 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
2350 enum nl80211_iftype iftype;
2354 iftype = wdev->iftype;
2356 /* make sure the interface is active */
2357 if (!wdev->netdev || !netif_running(wdev->netdev))
2358 goto wdev_inactive_unlock;
2361 case NL80211_IFTYPE_AP:
2362 case NL80211_IFTYPE_P2P_GO:
2363 if (!wdev->beacon_interval)
2364 goto wdev_inactive_unlock;
2365 chandef = wdev->chandef;
2367 case NL80211_IFTYPE_ADHOC:
2368 if (!wdev->ssid_len)
2369 goto wdev_inactive_unlock;
2370 chandef = wdev->chandef;
2372 case NL80211_IFTYPE_STATION:
2373 case NL80211_IFTYPE_P2P_CLIENT:
2374 if (!wdev->current_bss ||
2375 !wdev->current_bss->pub.channel)
2376 goto wdev_inactive_unlock;
2378 if (!rdev->ops->get_channel ||
2379 rdev_get_channel(rdev, wdev, &chandef))
2380 cfg80211_chandef_create(&chandef,
2381 wdev->current_bss->pub.channel,
2382 NL80211_CHAN_NO_HT);
2384 case NL80211_IFTYPE_MONITOR:
2385 case NL80211_IFTYPE_AP_VLAN:
2386 case NL80211_IFTYPE_P2P_DEVICE:
2387 /* no enforcement required */
2390 /* others not implemented for now */
2398 case NL80211_IFTYPE_AP:
2399 case NL80211_IFTYPE_P2P_GO:
2400 case NL80211_IFTYPE_ADHOC:
2402 ret = cfg80211_reg_can_beacon_relax(wiphy, &chandef, iftype);
2403 wiphy_unlock(wiphy);
2406 case NL80211_IFTYPE_STATION:
2407 case NL80211_IFTYPE_P2P_CLIENT:
2408 return cfg80211_chandef_usable(wiphy, &chandef,
2409 IEEE80211_CHAN_DISABLED);
2416 wdev_inactive_unlock:
2421 static void reg_leave_invalid_chans(struct wiphy *wiphy)
2423 struct wireless_dev *wdev;
2424 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
2428 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list)
2429 if (!reg_wdev_chan_valid(wiphy, wdev))
2430 cfg80211_leave(rdev, wdev);
2433 static void reg_check_chans_work(struct work_struct *work)
2435 struct cfg80211_registered_device *rdev;
2437 pr_debug("Verifying active interfaces after reg change\n");
2440 list_for_each_entry(rdev, &cfg80211_rdev_list, list)
2441 if (!(rdev->wiphy.regulatory_flags &
2442 REGULATORY_IGNORE_STALE_KICKOFF))
2443 reg_leave_invalid_chans(&rdev->wiphy);
2448 static void reg_check_channels(void)
2451 * Give usermode a chance to do something nicer (move to another
2452 * channel, orderly disconnection), before forcing a disconnection.
2454 mod_delayed_work(system_power_efficient_wq,
2456 msecs_to_jiffies(REG_ENFORCE_GRACE_MS));
2459 static void wiphy_update_regulatory(struct wiphy *wiphy,
2460 enum nl80211_reg_initiator initiator)
2462 enum nl80211_band band;
2463 struct regulatory_request *lr = get_last_request();
2465 if (ignore_reg_update(wiphy, initiator)) {
2467 * Regulatory updates set by CORE are ignored for custom
2468 * regulatory cards. Let us notify the changes to the driver,
2469 * as some drivers used this to restore its orig_* reg domain.
2471 if (initiator == NL80211_REGDOM_SET_BY_CORE &&
2472 wiphy->regulatory_flags & REGULATORY_CUSTOM_REG &&
2473 !(wiphy->regulatory_flags &
2474 REGULATORY_WIPHY_SELF_MANAGED))
2475 reg_call_notifier(wiphy, lr);
2479 lr->dfs_region = get_cfg80211_regdom()->dfs_region;
2481 for (band = 0; band < NUM_NL80211_BANDS; band++)
2482 handle_band(wiphy, initiator, wiphy->bands[band]);
2484 reg_process_beacons(wiphy);
2485 reg_process_ht_flags(wiphy);
2486 reg_call_notifier(wiphy, lr);
2489 static void update_all_wiphy_regulatory(enum nl80211_reg_initiator initiator)
2491 struct cfg80211_registered_device *rdev;
2492 struct wiphy *wiphy;
2496 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
2497 wiphy = &rdev->wiphy;
2498 wiphy_update_regulatory(wiphy, initiator);
2501 reg_check_channels();
2504 static void handle_channel_custom(struct wiphy *wiphy,
2505 struct ieee80211_channel *chan,
2506 const struct ieee80211_regdomain *regd,
2510 const struct ieee80211_reg_rule *reg_rule = NULL;
2511 const struct ieee80211_power_rule *power_rule = NULL;
2512 u32 bw, center_freq_khz;
2514 center_freq_khz = ieee80211_channel_to_khz(chan);
2515 for (bw = MHZ_TO_KHZ(20); bw >= min_bw; bw = bw / 2) {
2516 reg_rule = freq_reg_info_regd(center_freq_khz, regd, bw);
2517 if (!IS_ERR(reg_rule))
2521 if (IS_ERR_OR_NULL(reg_rule)) {
2522 pr_debug("Disabling freq %d.%03d MHz as custom regd has no rule that fits it\n",
2523 chan->center_freq, chan->freq_offset);
2524 if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) {
2525 chan->flags |= IEEE80211_CHAN_DISABLED;
2527 chan->orig_flags |= IEEE80211_CHAN_DISABLED;
2528 chan->flags = chan->orig_flags;
2533 power_rule = ®_rule->power_rule;
2534 bw_flags = reg_rule_to_chan_bw_flags(regd, reg_rule, chan);
2536 chan->dfs_state_entered = jiffies;
2537 chan->dfs_state = NL80211_DFS_USABLE;
2539 chan->beacon_found = false;
2541 if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED)
2542 chan->flags = chan->orig_flags | bw_flags |
2543 map_regdom_flags(reg_rule->flags);
2545 chan->flags |= map_regdom_flags(reg_rule->flags) | bw_flags;
2547 chan->max_antenna_gain = (int) MBI_TO_DBI(power_rule->max_antenna_gain);
2548 chan->max_reg_power = chan->max_power =
2549 (int) MBM_TO_DBM(power_rule->max_eirp);
2551 if (chan->flags & IEEE80211_CHAN_RADAR) {
2552 if (reg_rule->dfs_cac_ms)
2553 chan->dfs_cac_ms = reg_rule->dfs_cac_ms;
2555 chan->dfs_cac_ms = IEEE80211_DFS_MIN_CAC_TIME_MS;
2558 chan->max_power = chan->max_reg_power;
2561 static void handle_band_custom(struct wiphy *wiphy,
2562 struct ieee80211_supported_band *sband,
2563 const struct ieee80211_regdomain *regd)
2571 * We currently assume that you always want at least 20 MHz,
2572 * otherwise channel 12 might get enabled if this rule is
2573 * compatible to US, which permits 2402 - 2472 MHz.
2575 for (i = 0; i < sband->n_channels; i++)
2576 handle_channel_custom(wiphy, &sband->channels[i], regd,
2580 /* Used by drivers prior to wiphy registration */
2581 void wiphy_apply_custom_regulatory(struct wiphy *wiphy,
2582 const struct ieee80211_regdomain *regd)
2584 const struct ieee80211_regdomain *new_regd, *tmp;
2585 enum nl80211_band band;
2586 unsigned int bands_set = 0;
2588 WARN(!(wiphy->regulatory_flags & REGULATORY_CUSTOM_REG),
2589 "wiphy should have REGULATORY_CUSTOM_REG\n");
2590 wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG;
2592 for (band = 0; band < NUM_NL80211_BANDS; band++) {
2593 if (!wiphy->bands[band])
2595 handle_band_custom(wiphy, wiphy->bands[band], regd);
2600 * no point in calling this if it won't have any effect
2601 * on your device's supported bands.
2603 WARN_ON(!bands_set);
2604 new_regd = reg_copy_regd(regd);
2605 if (IS_ERR(new_regd))
2611 tmp = get_wiphy_regdom(wiphy);
2612 rcu_assign_pointer(wiphy->regd, new_regd);
2613 rcu_free_regdom(tmp);
2615 wiphy_unlock(wiphy);
2618 EXPORT_SYMBOL(wiphy_apply_custom_regulatory);
2620 static void reg_set_request_processed(void)
2622 bool need_more_processing = false;
2623 struct regulatory_request *lr = get_last_request();
2625 lr->processed = true;
2627 spin_lock(®_requests_lock);
2628 if (!list_empty(®_requests_list))
2629 need_more_processing = true;
2630 spin_unlock(®_requests_lock);
2632 cancel_crda_timeout();
2634 if (need_more_processing)
2635 schedule_work(®_work);
2639 * reg_process_hint_core - process core regulatory requests
2640 * @core_request: a pending core regulatory request
2642 * The wireless subsystem can use this function to process
2643 * a regulatory request issued by the regulatory core.
2645 static enum reg_request_treatment
2646 reg_process_hint_core(struct regulatory_request *core_request)
2648 if (reg_query_database(core_request)) {
2649 core_request->intersect = false;
2650 core_request->processed = false;
2651 reg_update_last_request(core_request);
2655 return REG_REQ_IGNORE;
2658 static enum reg_request_treatment
2659 __reg_process_hint_user(struct regulatory_request *user_request)
2661 struct regulatory_request *lr = get_last_request();
2663 if (reg_request_cell_base(user_request))
2664 return reg_ignore_cell_hint(user_request);
2666 if (reg_request_cell_base(lr))
2667 return REG_REQ_IGNORE;
2669 if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE)
2670 return REG_REQ_INTERSECT;
2672 * If the user knows better the user should set the regdom
2673 * to their country before the IE is picked up
2675 if (lr->initiator == NL80211_REGDOM_SET_BY_USER &&
2677 return REG_REQ_IGNORE;
2679 * Process user requests only after previous user/driver/core
2680 * requests have been processed
2682 if ((lr->initiator == NL80211_REGDOM_SET_BY_CORE ||
2683 lr->initiator == NL80211_REGDOM_SET_BY_DRIVER ||
2684 lr->initiator == NL80211_REGDOM_SET_BY_USER) &&
2685 regdom_changes(lr->alpha2))
2686 return REG_REQ_IGNORE;
2688 if (!regdom_changes(user_request->alpha2))
2689 return REG_REQ_ALREADY_SET;
2695 * reg_process_hint_user - process user regulatory requests
2696 * @user_request: a pending user regulatory request
2698 * The wireless subsystem can use this function to process
2699 * a regulatory request initiated by userspace.
2701 static enum reg_request_treatment
2702 reg_process_hint_user(struct regulatory_request *user_request)
2704 enum reg_request_treatment treatment;
2706 treatment = __reg_process_hint_user(user_request);
2707 if (treatment == REG_REQ_IGNORE ||
2708 treatment == REG_REQ_ALREADY_SET)
2709 return REG_REQ_IGNORE;
2711 user_request->intersect = treatment == REG_REQ_INTERSECT;
2712 user_request->processed = false;
2714 if (reg_query_database(user_request)) {
2715 reg_update_last_request(user_request);
2716 user_alpha2[0] = user_request->alpha2[0];
2717 user_alpha2[1] = user_request->alpha2[1];
2721 return REG_REQ_IGNORE;
2724 static enum reg_request_treatment
2725 __reg_process_hint_driver(struct regulatory_request *driver_request)
2727 struct regulatory_request *lr = get_last_request();
2729 if (lr->initiator == NL80211_REGDOM_SET_BY_CORE) {
2730 if (regdom_changes(driver_request->alpha2))
2732 return REG_REQ_ALREADY_SET;
2736 * This would happen if you unplug and plug your card
2737 * back in or if you add a new device for which the previously
2738 * loaded card also agrees on the regulatory domain.
2740 if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER &&
2741 !regdom_changes(driver_request->alpha2))
2742 return REG_REQ_ALREADY_SET;
2744 return REG_REQ_INTERSECT;
2748 * reg_process_hint_driver - process driver regulatory requests
2749 * @wiphy: the wireless device for the regulatory request
2750 * @driver_request: a pending driver regulatory request
2752 * The wireless subsystem can use this function to process
2753 * a regulatory request issued by an 802.11 driver.
2755 * Returns one of the different reg request treatment values.
2757 static enum reg_request_treatment
2758 reg_process_hint_driver(struct wiphy *wiphy,
2759 struct regulatory_request *driver_request)
2761 const struct ieee80211_regdomain *regd, *tmp;
2762 enum reg_request_treatment treatment;
2764 treatment = __reg_process_hint_driver(driver_request);
2766 switch (treatment) {
2769 case REG_REQ_IGNORE:
2770 return REG_REQ_IGNORE;
2771 case REG_REQ_INTERSECT:
2772 case REG_REQ_ALREADY_SET:
2773 regd = reg_copy_regd(get_cfg80211_regdom());
2775 return REG_REQ_IGNORE;
2777 tmp = get_wiphy_regdom(wiphy);
2780 rcu_assign_pointer(wiphy->regd, regd);
2781 wiphy_unlock(wiphy);
2782 rcu_free_regdom(tmp);
2786 driver_request->intersect = treatment == REG_REQ_INTERSECT;
2787 driver_request->processed = false;
2790 * Since CRDA will not be called in this case as we already
2791 * have applied the requested regulatory domain before we just
2792 * inform userspace we have processed the request
2794 if (treatment == REG_REQ_ALREADY_SET) {
2795 nl80211_send_reg_change_event(driver_request);
2796 reg_update_last_request(driver_request);
2797 reg_set_request_processed();
2798 return REG_REQ_ALREADY_SET;
2801 if (reg_query_database(driver_request)) {
2802 reg_update_last_request(driver_request);
2806 return REG_REQ_IGNORE;
2809 static enum reg_request_treatment
2810 __reg_process_hint_country_ie(struct wiphy *wiphy,
2811 struct regulatory_request *country_ie_request)
2813 struct wiphy *last_wiphy = NULL;
2814 struct regulatory_request *lr = get_last_request();
2816 if (reg_request_cell_base(lr)) {
2817 /* Trust a Cell base station over the AP's country IE */
2818 if (regdom_changes(country_ie_request->alpha2))
2819 return REG_REQ_IGNORE;
2820 return REG_REQ_ALREADY_SET;
2822 if (wiphy->regulatory_flags & REGULATORY_COUNTRY_IE_IGNORE)
2823 return REG_REQ_IGNORE;
2826 if (unlikely(!is_an_alpha2(country_ie_request->alpha2)))
2829 if (lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE)
2832 last_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx);
2834 if (last_wiphy != wiphy) {
2836 * Two cards with two APs claiming different
2837 * Country IE alpha2s. We could
2838 * intersect them, but that seems unlikely
2839 * to be correct. Reject second one for now.
2841 if (regdom_changes(country_ie_request->alpha2))
2842 return REG_REQ_IGNORE;
2843 return REG_REQ_ALREADY_SET;
2846 if (regdom_changes(country_ie_request->alpha2))
2848 return REG_REQ_ALREADY_SET;
2852 * reg_process_hint_country_ie - process regulatory requests from country IEs
2853 * @wiphy: the wireless device for the regulatory request
2854 * @country_ie_request: a regulatory request from a country IE
2856 * The wireless subsystem can use this function to process
2857 * a regulatory request issued by a country Information Element.
2859 * Returns one of the different reg request treatment values.
2861 static enum reg_request_treatment
2862 reg_process_hint_country_ie(struct wiphy *wiphy,
2863 struct regulatory_request *country_ie_request)
2865 enum reg_request_treatment treatment;
2867 treatment = __reg_process_hint_country_ie(wiphy, country_ie_request);
2869 switch (treatment) {
2872 case REG_REQ_IGNORE:
2873 return REG_REQ_IGNORE;
2874 case REG_REQ_ALREADY_SET:
2875 reg_free_request(country_ie_request);
2876 return REG_REQ_ALREADY_SET;
2877 case REG_REQ_INTERSECT:
2879 * This doesn't happen yet, not sure we
2880 * ever want to support it for this case.
2882 WARN_ONCE(1, "Unexpected intersection for country elements");
2883 return REG_REQ_IGNORE;
2886 country_ie_request->intersect = false;
2887 country_ie_request->processed = false;
2889 if (reg_query_database(country_ie_request)) {
2890 reg_update_last_request(country_ie_request);
2894 return REG_REQ_IGNORE;
2897 bool reg_dfs_domain_same(struct wiphy *wiphy1, struct wiphy *wiphy2)
2899 const struct ieee80211_regdomain *wiphy1_regd = NULL;
2900 const struct ieee80211_regdomain *wiphy2_regd = NULL;
2901 const struct ieee80211_regdomain *cfg80211_regd = NULL;
2902 bool dfs_domain_same;
2906 cfg80211_regd = rcu_dereference(cfg80211_regdomain);
2907 wiphy1_regd = rcu_dereference(wiphy1->regd);
2909 wiphy1_regd = cfg80211_regd;
2911 wiphy2_regd = rcu_dereference(wiphy2->regd);
2913 wiphy2_regd = cfg80211_regd;
2915 dfs_domain_same = wiphy1_regd->dfs_region == wiphy2_regd->dfs_region;
2919 return dfs_domain_same;
2922 static void reg_copy_dfs_chan_state(struct ieee80211_channel *dst_chan,
2923 struct ieee80211_channel *src_chan)
2925 if (!(dst_chan->flags & IEEE80211_CHAN_RADAR) ||
2926 !(src_chan->flags & IEEE80211_CHAN_RADAR))
2929 if (dst_chan->flags & IEEE80211_CHAN_DISABLED ||
2930 src_chan->flags & IEEE80211_CHAN_DISABLED)
2933 if (src_chan->center_freq == dst_chan->center_freq &&
2934 dst_chan->dfs_state == NL80211_DFS_USABLE) {
2935 dst_chan->dfs_state = src_chan->dfs_state;
2936 dst_chan->dfs_state_entered = src_chan->dfs_state_entered;
2940 static void wiphy_share_dfs_chan_state(struct wiphy *dst_wiphy,
2941 struct wiphy *src_wiphy)
2943 struct ieee80211_supported_band *src_sband, *dst_sband;
2944 struct ieee80211_channel *src_chan, *dst_chan;
2947 if (!reg_dfs_domain_same(dst_wiphy, src_wiphy))
2950 for (band = 0; band < NUM_NL80211_BANDS; band++) {
2951 dst_sband = dst_wiphy->bands[band];
2952 src_sband = src_wiphy->bands[band];
2953 if (!dst_sband || !src_sband)
2956 for (i = 0; i < dst_sband->n_channels; i++) {
2957 dst_chan = &dst_sband->channels[i];
2958 for (j = 0; j < src_sband->n_channels; j++) {
2959 src_chan = &src_sband->channels[j];
2960 reg_copy_dfs_chan_state(dst_chan, src_chan);
2966 static void wiphy_all_share_dfs_chan_state(struct wiphy *wiphy)
2968 struct cfg80211_registered_device *rdev;
2972 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
2973 if (wiphy == &rdev->wiphy)
2975 wiphy_share_dfs_chan_state(wiphy, &rdev->wiphy);
2979 /* This processes *all* regulatory hints */
2980 static void reg_process_hint(struct regulatory_request *reg_request)
2982 struct wiphy *wiphy = NULL;
2983 enum reg_request_treatment treatment;
2984 enum nl80211_reg_initiator initiator = reg_request->initiator;
2986 if (reg_request->wiphy_idx != WIPHY_IDX_INVALID)
2987 wiphy = wiphy_idx_to_wiphy(reg_request->wiphy_idx);
2989 switch (initiator) {
2990 case NL80211_REGDOM_SET_BY_CORE:
2991 treatment = reg_process_hint_core(reg_request);
2993 case NL80211_REGDOM_SET_BY_USER:
2994 treatment = reg_process_hint_user(reg_request);
2996 case NL80211_REGDOM_SET_BY_DRIVER:
2999 treatment = reg_process_hint_driver(wiphy, reg_request);
3001 case NL80211_REGDOM_SET_BY_COUNTRY_IE:
3004 treatment = reg_process_hint_country_ie(wiphy, reg_request);
3007 WARN(1, "invalid initiator %d\n", initiator);
3011 if (treatment == REG_REQ_IGNORE)
3014 WARN(treatment != REG_REQ_OK && treatment != REG_REQ_ALREADY_SET,
3015 "unexpected treatment value %d\n", treatment);
3017 /* This is required so that the orig_* parameters are saved.
3018 * NOTE: treatment must be set for any case that reaches here!
3020 if (treatment == REG_REQ_ALREADY_SET && wiphy &&
3021 wiphy->regulatory_flags & REGULATORY_STRICT_REG) {
3022 wiphy_update_regulatory(wiphy, initiator);
3023 wiphy_all_share_dfs_chan_state(wiphy);
3024 reg_check_channels();
3030 reg_free_request(reg_request);
3033 static void notify_self_managed_wiphys(struct regulatory_request *request)
3035 struct cfg80211_registered_device *rdev;
3036 struct wiphy *wiphy;
3038 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
3039 wiphy = &rdev->wiphy;
3040 if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED &&
3041 request->initiator == NL80211_REGDOM_SET_BY_USER)
3042 reg_call_notifier(wiphy, request);
3047 * Processes regulatory hints, this is all the NL80211_REGDOM_SET_BY_*
3048 * Regulatory hints come on a first come first serve basis and we
3049 * must process each one atomically.
3051 static void reg_process_pending_hints(void)
3053 struct regulatory_request *reg_request, *lr;
3055 lr = get_last_request();
3057 /* When last_request->processed becomes true this will be rescheduled */
3058 if (lr && !lr->processed) {
3059 pr_debug("Pending regulatory request, waiting for it to be processed...\n");
3063 spin_lock(®_requests_lock);
3065 if (list_empty(®_requests_list)) {
3066 spin_unlock(®_requests_lock);
3070 reg_request = list_first_entry(®_requests_list,
3071 struct regulatory_request,
3073 list_del_init(®_request->list);
3075 spin_unlock(®_requests_lock);
3077 notify_self_managed_wiphys(reg_request);
3079 reg_process_hint(reg_request);
3081 lr = get_last_request();
3083 spin_lock(®_requests_lock);
3084 if (!list_empty(®_requests_list) && lr && lr->processed)
3085 schedule_work(®_work);
3086 spin_unlock(®_requests_lock);
3089 /* Processes beacon hints -- this has nothing to do with country IEs */
3090 static void reg_process_pending_beacon_hints(void)
3092 struct cfg80211_registered_device *rdev;
3093 struct reg_beacon *pending_beacon, *tmp;
3095 /* This goes through the _pending_ beacon list */
3096 spin_lock_bh(®_pending_beacons_lock);
3098 list_for_each_entry_safe(pending_beacon, tmp,
3099 ®_pending_beacons, list) {
3100 list_del_init(&pending_beacon->list);
3102 /* Applies the beacon hint to current wiphys */
3103 list_for_each_entry(rdev, &cfg80211_rdev_list, list)
3104 wiphy_update_new_beacon(&rdev->wiphy, pending_beacon);
3106 /* Remembers the beacon hint for new wiphys or reg changes */
3107 list_add_tail(&pending_beacon->list, ®_beacon_list);
3110 spin_unlock_bh(®_pending_beacons_lock);
3113 static void reg_process_self_managed_hint(struct wiphy *wiphy)
3115 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
3116 const struct ieee80211_regdomain *tmp;
3117 const struct ieee80211_regdomain *regd;
3118 enum nl80211_band band;
3119 struct regulatory_request request = {};
3122 lockdep_assert_wiphy(wiphy);
3124 spin_lock(®_requests_lock);
3125 regd = rdev->requested_regd;
3126 rdev->requested_regd = NULL;
3127 spin_unlock(®_requests_lock);
3132 tmp = get_wiphy_regdom(wiphy);
3133 rcu_assign_pointer(wiphy->regd, regd);
3134 rcu_free_regdom(tmp);
3136 for (band = 0; band < NUM_NL80211_BANDS; band++)
3137 handle_band_custom(wiphy, wiphy->bands[band], regd);
3139 reg_process_ht_flags(wiphy);
3141 request.wiphy_idx = get_wiphy_idx(wiphy);
3142 request.alpha2[0] = regd->alpha2[0];
3143 request.alpha2[1] = regd->alpha2[1];
3144 request.initiator = NL80211_REGDOM_SET_BY_DRIVER;
3146 nl80211_send_wiphy_reg_change_event(&request);
3149 static void reg_process_self_managed_hints(void)
3151 struct cfg80211_registered_device *rdev;
3155 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
3156 wiphy_lock(&rdev->wiphy);
3157 reg_process_self_managed_hint(&rdev->wiphy);
3158 wiphy_unlock(&rdev->wiphy);
3161 reg_check_channels();
3164 static void reg_todo(struct work_struct *work)
3167 reg_process_pending_hints();
3168 reg_process_pending_beacon_hints();
3169 reg_process_self_managed_hints();
3173 static void queue_regulatory_request(struct regulatory_request *request)
3175 request->alpha2[0] = toupper(request->alpha2[0]);
3176 request->alpha2[1] = toupper(request->alpha2[1]);
3178 spin_lock(®_requests_lock);
3179 list_add_tail(&request->list, ®_requests_list);
3180 spin_unlock(®_requests_lock);
3182 schedule_work(®_work);
3186 * Core regulatory hint -- happens during cfg80211_init()
3187 * and when we restore regulatory settings.
3189 static int regulatory_hint_core(const char *alpha2)
3191 struct regulatory_request *request;
3193 request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL);
3197 request->alpha2[0] = alpha2[0];
3198 request->alpha2[1] = alpha2[1];
3199 request->initiator = NL80211_REGDOM_SET_BY_CORE;
3200 request->wiphy_idx = WIPHY_IDX_INVALID;
3202 queue_regulatory_request(request);
3208 int regulatory_hint_user(const char *alpha2,
3209 enum nl80211_user_reg_hint_type user_reg_hint_type)
3211 struct regulatory_request *request;
3213 if (WARN_ON(!alpha2))
3216 if (!is_world_regdom(alpha2) && !is_an_alpha2(alpha2))
3219 request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL);
3223 request->wiphy_idx = WIPHY_IDX_INVALID;
3224 request->alpha2[0] = alpha2[0];
3225 request->alpha2[1] = alpha2[1];
3226 request->initiator = NL80211_REGDOM_SET_BY_USER;
3227 request->user_reg_hint_type = user_reg_hint_type;
3229 /* Allow calling CRDA again */
3230 reset_crda_timeouts();
3232 queue_regulatory_request(request);
3237 int regulatory_hint_indoor(bool is_indoor, u32 portid)
3239 spin_lock(®_indoor_lock);
3241 /* It is possible that more than one user space process is trying to
3242 * configure the indoor setting. To handle such cases, clear the indoor
3243 * setting in case that some process does not think that the device
3244 * is operating in an indoor environment. In addition, if a user space
3245 * process indicates that it is controlling the indoor setting, save its
3246 * portid, i.e., make it the owner.
3248 reg_is_indoor = is_indoor;
3249 if (reg_is_indoor) {
3250 if (!reg_is_indoor_portid)
3251 reg_is_indoor_portid = portid;
3253 reg_is_indoor_portid = 0;
3256 spin_unlock(®_indoor_lock);
3259 reg_check_channels();
3264 void regulatory_netlink_notify(u32 portid)
3266 spin_lock(®_indoor_lock);
3268 if (reg_is_indoor_portid != portid) {
3269 spin_unlock(®_indoor_lock);
3273 reg_is_indoor = false;
3274 reg_is_indoor_portid = 0;
3276 spin_unlock(®_indoor_lock);
3278 reg_check_channels();
3282 int regulatory_hint(struct wiphy *wiphy, const char *alpha2)
3284 struct regulatory_request *request;
3286 if (WARN_ON(!alpha2 || !wiphy))
3289 wiphy->regulatory_flags &= ~REGULATORY_CUSTOM_REG;
3291 request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL);
3295 request->wiphy_idx = get_wiphy_idx(wiphy);
3297 request->alpha2[0] = alpha2[0];
3298 request->alpha2[1] = alpha2[1];
3299 request->initiator = NL80211_REGDOM_SET_BY_DRIVER;
3301 /* Allow calling CRDA again */
3302 reset_crda_timeouts();
3304 queue_regulatory_request(request);
3308 EXPORT_SYMBOL(regulatory_hint);
3310 void regulatory_hint_country_ie(struct wiphy *wiphy, enum nl80211_band band,
3311 const u8 *country_ie, u8 country_ie_len)
3314 enum environment_cap env = ENVIRON_ANY;
3315 struct regulatory_request *request = NULL, *lr;
3317 /* IE len must be evenly divisible by 2 */
3318 if (country_ie_len & 0x01)
3321 if (country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
3324 request = kzalloc(sizeof(*request), GFP_KERNEL);
3328 alpha2[0] = country_ie[0];
3329 alpha2[1] = country_ie[1];
3331 if (country_ie[2] == 'I')
3332 env = ENVIRON_INDOOR;
3333 else if (country_ie[2] == 'O')
3334 env = ENVIRON_OUTDOOR;
3337 lr = get_last_request();
3343 * We will run this only upon a successful connection on cfg80211.
3344 * We leave conflict resolution to the workqueue, where can hold
3347 if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE &&
3348 lr->wiphy_idx != WIPHY_IDX_INVALID)
3351 request->wiphy_idx = get_wiphy_idx(wiphy);
3352 request->alpha2[0] = alpha2[0];
3353 request->alpha2[1] = alpha2[1];
3354 request->initiator = NL80211_REGDOM_SET_BY_COUNTRY_IE;
3355 request->country_ie_env = env;
3357 /* Allow calling CRDA again */
3358 reset_crda_timeouts();
3360 queue_regulatory_request(request);
3367 static void restore_alpha2(char *alpha2, bool reset_user)
3369 /* indicates there is no alpha2 to consider for restoration */
3373 /* The user setting has precedence over the module parameter */
3374 if (is_user_regdom_saved()) {
3375 /* Unless we're asked to ignore it and reset it */
3377 pr_debug("Restoring regulatory settings including user preference\n");
3378 user_alpha2[0] = '9';
3379 user_alpha2[1] = '7';
3382 * If we're ignoring user settings, we still need to
3383 * check the module parameter to ensure we put things
3384 * back as they were for a full restore.
3386 if (!is_world_regdom(ieee80211_regdom)) {
3387 pr_debug("Keeping preference on module parameter ieee80211_regdom: %c%c\n",
3388 ieee80211_regdom[0], ieee80211_regdom[1]);
3389 alpha2[0] = ieee80211_regdom[0];
3390 alpha2[1] = ieee80211_regdom[1];
3393 pr_debug("Restoring regulatory settings while preserving user preference for: %c%c\n",
3394 user_alpha2[0], user_alpha2[1]);
3395 alpha2[0] = user_alpha2[0];
3396 alpha2[1] = user_alpha2[1];
3398 } else if (!is_world_regdom(ieee80211_regdom)) {
3399 pr_debug("Keeping preference on module parameter ieee80211_regdom: %c%c\n",
3400 ieee80211_regdom[0], ieee80211_regdom[1]);
3401 alpha2[0] = ieee80211_regdom[0];
3402 alpha2[1] = ieee80211_regdom[1];
3404 pr_debug("Restoring regulatory settings\n");
3407 static void restore_custom_reg_settings(struct wiphy *wiphy)
3409 struct ieee80211_supported_band *sband;
3410 enum nl80211_band band;
3411 struct ieee80211_channel *chan;
3414 for (band = 0; band < NUM_NL80211_BANDS; band++) {
3415 sband = wiphy->bands[band];
3418 for (i = 0; i < sband->n_channels; i++) {
3419 chan = &sband->channels[i];
3420 chan->flags = chan->orig_flags;
3421 chan->max_antenna_gain = chan->orig_mag;
3422 chan->max_power = chan->orig_mpwr;
3423 chan->beacon_found = false;
3429 * Restoring regulatory settings involves ignoring any
3430 * possibly stale country IE information and user regulatory
3431 * settings if so desired, this includes any beacon hints
3432 * learned as we could have traveled outside to another country
3433 * after disconnection. To restore regulatory settings we do
3434 * exactly what we did at bootup:
3436 * - send a core regulatory hint
3437 * - send a user regulatory hint if applicable
3439 * Device drivers that send a regulatory hint for a specific country
3440 * keep their own regulatory domain on wiphy->regd so that does
3441 * not need to be remembered.
3443 static void restore_regulatory_settings(bool reset_user, bool cached)
3446 char world_alpha2[2];
3447 struct reg_beacon *reg_beacon, *btmp;
3448 LIST_HEAD(tmp_reg_req_list);
3449 struct cfg80211_registered_device *rdev;
3454 * Clear the indoor setting in case that it is not controlled by user
3455 * space, as otherwise there is no guarantee that the device is still
3456 * operating in an indoor environment.
3458 spin_lock(®_indoor_lock);
3459 if (reg_is_indoor && !reg_is_indoor_portid) {
3460 reg_is_indoor = false;
3461 reg_check_channels();
3463 spin_unlock(®_indoor_lock);
3465 reset_regdomains(true, &world_regdom);
3466 restore_alpha2(alpha2, reset_user);
3469 * If there's any pending requests we simply
3470 * stash them to a temporary pending queue and
3471 * add then after we've restored regulatory
3474 spin_lock(®_requests_lock);
3475 list_splice_tail_init(®_requests_list, &tmp_reg_req_list);
3476 spin_unlock(®_requests_lock);
3478 /* Clear beacon hints */
3479 spin_lock_bh(®_pending_beacons_lock);
3480 list_for_each_entry_safe(reg_beacon, btmp, ®_pending_beacons, list) {
3481 list_del(®_beacon->list);
3484 spin_unlock_bh(®_pending_beacons_lock);
3486 list_for_each_entry_safe(reg_beacon, btmp, ®_beacon_list, list) {
3487 list_del(®_beacon->list);
3491 /* First restore to the basic regulatory settings */
3492 world_alpha2[0] = cfg80211_world_regdom->alpha2[0];
3493 world_alpha2[1] = cfg80211_world_regdom->alpha2[1];
3495 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
3496 if (rdev->wiphy.regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED)
3498 if (rdev->wiphy.regulatory_flags & REGULATORY_CUSTOM_REG)
3499 restore_custom_reg_settings(&rdev->wiphy);
3502 if (cached && (!is_an_alpha2(alpha2) ||
3503 !IS_ERR_OR_NULL(cfg80211_user_regdom))) {
3504 reset_regdomains(false, cfg80211_world_regdom);
3505 update_all_wiphy_regulatory(NL80211_REGDOM_SET_BY_CORE);
3506 print_regdomain(get_cfg80211_regdom());
3507 nl80211_send_reg_change_event(&core_request_world);
3508 reg_set_request_processed();
3510 if (is_an_alpha2(alpha2) &&
3511 !regulatory_hint_user(alpha2, NL80211_USER_REG_HINT_USER)) {
3512 struct regulatory_request *ureq;
3514 spin_lock(®_requests_lock);
3515 ureq = list_last_entry(®_requests_list,
3516 struct regulatory_request,
3518 list_del(&ureq->list);
3519 spin_unlock(®_requests_lock);
3521 notify_self_managed_wiphys(ureq);
3522 reg_update_last_request(ureq);
3523 set_regdom(reg_copy_regd(cfg80211_user_regdom),
3524 REGD_SOURCE_CACHED);
3527 regulatory_hint_core(world_alpha2);
3530 * This restores the ieee80211_regdom module parameter
3531 * preference or the last user requested regulatory
3532 * settings, user regulatory settings takes precedence.
3534 if (is_an_alpha2(alpha2))
3535 regulatory_hint_user(alpha2, NL80211_USER_REG_HINT_USER);
3538 spin_lock(®_requests_lock);
3539 list_splice_tail_init(&tmp_reg_req_list, ®_requests_list);
3540 spin_unlock(®_requests_lock);
3542 pr_debug("Kicking the queue\n");
3544 schedule_work(®_work);
3547 static bool is_wiphy_all_set_reg_flag(enum ieee80211_regulatory_flags flag)
3549 struct cfg80211_registered_device *rdev;
3550 struct wireless_dev *wdev;
3552 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
3553 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
3555 if (!(wdev->wiphy->regulatory_flags & flag)) {
3566 void regulatory_hint_disconnect(void)
3568 /* Restore of regulatory settings is not required when wiphy(s)
3569 * ignore IE from connected access point but clearance of beacon hints
3570 * is required when wiphy(s) supports beacon hints.
3572 if (is_wiphy_all_set_reg_flag(REGULATORY_COUNTRY_IE_IGNORE)) {
3573 struct reg_beacon *reg_beacon, *btmp;
3575 if (is_wiphy_all_set_reg_flag(REGULATORY_DISABLE_BEACON_HINTS))
3578 spin_lock_bh(®_pending_beacons_lock);
3579 list_for_each_entry_safe(reg_beacon, btmp,
3580 ®_pending_beacons, list) {
3581 list_del(®_beacon->list);
3584 spin_unlock_bh(®_pending_beacons_lock);
3586 list_for_each_entry_safe(reg_beacon, btmp,
3587 ®_beacon_list, list) {
3588 list_del(®_beacon->list);
3595 pr_debug("All devices are disconnected, going to restore regulatory settings\n");
3596 restore_regulatory_settings(false, true);
3599 static bool freq_is_chan_12_13_14(u32 freq)
3601 if (freq == ieee80211_channel_to_frequency(12, NL80211_BAND_2GHZ) ||
3602 freq == ieee80211_channel_to_frequency(13, NL80211_BAND_2GHZ) ||
3603 freq == ieee80211_channel_to_frequency(14, NL80211_BAND_2GHZ))
3608 static bool pending_reg_beacon(struct ieee80211_channel *beacon_chan)
3610 struct reg_beacon *pending_beacon;
3612 list_for_each_entry(pending_beacon, ®_pending_beacons, list)
3613 if (ieee80211_channel_equal(beacon_chan,
3614 &pending_beacon->chan))
3619 int regulatory_hint_found_beacon(struct wiphy *wiphy,
3620 struct ieee80211_channel *beacon_chan,
3623 struct reg_beacon *reg_beacon;
3626 if (beacon_chan->beacon_found ||
3627 beacon_chan->flags & IEEE80211_CHAN_RADAR ||
3628 (beacon_chan->band == NL80211_BAND_2GHZ &&
3629 !freq_is_chan_12_13_14(beacon_chan->center_freq)))
3632 spin_lock_bh(®_pending_beacons_lock);
3633 processing = pending_reg_beacon(beacon_chan);
3634 spin_unlock_bh(®_pending_beacons_lock);
3639 reg_beacon = kzalloc(sizeof(struct reg_beacon), gfp);
3643 pr_debug("Found new beacon on frequency: %d.%03d MHz (Ch %d) on %s\n",
3644 beacon_chan->center_freq, beacon_chan->freq_offset,
3645 ieee80211_freq_khz_to_channel(
3646 ieee80211_channel_to_khz(beacon_chan)),
3649 memcpy(®_beacon->chan, beacon_chan,
3650 sizeof(struct ieee80211_channel));
3653 * Since we can be called from BH or and non-BH context
3654 * we must use spin_lock_bh()
3656 spin_lock_bh(®_pending_beacons_lock);
3657 list_add_tail(®_beacon->list, ®_pending_beacons);
3658 spin_unlock_bh(®_pending_beacons_lock);
3660 schedule_work(®_work);
3665 static void print_rd_rules(const struct ieee80211_regdomain *rd)
3668 const struct ieee80211_reg_rule *reg_rule = NULL;
3669 const struct ieee80211_freq_range *freq_range = NULL;
3670 const struct ieee80211_power_rule *power_rule = NULL;
3671 char bw[32], cac_time[32];
3673 pr_debug(" (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp), (dfs_cac_time)\n");
3675 for (i = 0; i < rd->n_reg_rules; i++) {
3676 reg_rule = &rd->reg_rules[i];
3677 freq_range = ®_rule->freq_range;
3678 power_rule = ®_rule->power_rule;
3680 if (reg_rule->flags & NL80211_RRF_AUTO_BW)
3681 snprintf(bw, sizeof(bw), "%d KHz, %u KHz AUTO",
3682 freq_range->max_bandwidth_khz,
3683 reg_get_max_bandwidth(rd, reg_rule));
3685 snprintf(bw, sizeof(bw), "%d KHz",
3686 freq_range->max_bandwidth_khz);
3688 if (reg_rule->flags & NL80211_RRF_DFS)
3689 scnprintf(cac_time, sizeof(cac_time), "%u s",
3690 reg_rule->dfs_cac_ms/1000);
3692 scnprintf(cac_time, sizeof(cac_time), "N/A");
3696 * There may not be documentation for max antenna gain
3697 * in certain regions
3699 if (power_rule->max_antenna_gain)
3700 pr_debug(" (%d KHz - %d KHz @ %s), (%d mBi, %d mBm), (%s)\n",
3701 freq_range->start_freq_khz,
3702 freq_range->end_freq_khz,
3704 power_rule->max_antenna_gain,
3705 power_rule->max_eirp,
3708 pr_debug(" (%d KHz - %d KHz @ %s), (N/A, %d mBm), (%s)\n",
3709 freq_range->start_freq_khz,
3710 freq_range->end_freq_khz,
3712 power_rule->max_eirp,
3717 bool reg_supported_dfs_region(enum nl80211_dfs_regions dfs_region)
3719 switch (dfs_region) {
3720 case NL80211_DFS_UNSET:
3721 case NL80211_DFS_FCC:
3722 case NL80211_DFS_ETSI:
3723 case NL80211_DFS_JP:
3726 pr_debug("Ignoring unknown DFS master region: %d\n", dfs_region);
3731 static void print_regdomain(const struct ieee80211_regdomain *rd)
3733 struct regulatory_request *lr = get_last_request();
3735 if (is_intersected_alpha2(rd->alpha2)) {
3736 if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) {
3737 struct cfg80211_registered_device *rdev;
3738 rdev = cfg80211_rdev_by_wiphy_idx(lr->wiphy_idx);
3740 pr_debug("Current regulatory domain updated by AP to: %c%c\n",
3741 rdev->country_ie_alpha2[0],
3742 rdev->country_ie_alpha2[1]);
3744 pr_debug("Current regulatory domain intersected:\n");
3746 pr_debug("Current regulatory domain intersected:\n");
3747 } else if (is_world_regdom(rd->alpha2)) {
3748 pr_debug("World regulatory domain updated:\n");
3750 if (is_unknown_alpha2(rd->alpha2))
3751 pr_debug("Regulatory domain changed to driver built-in settings (unknown country)\n");
3753 if (reg_request_cell_base(lr))
3754 pr_debug("Regulatory domain changed to country: %c%c by Cell Station\n",
3755 rd->alpha2[0], rd->alpha2[1]);
3757 pr_debug("Regulatory domain changed to country: %c%c\n",
3758 rd->alpha2[0], rd->alpha2[1]);
3762 pr_debug(" DFS Master region: %s", reg_dfs_region_str(rd->dfs_region));
3766 static void print_regdomain_info(const struct ieee80211_regdomain *rd)
3768 pr_debug("Regulatory domain: %c%c\n", rd->alpha2[0], rd->alpha2[1]);
3772 static int reg_set_rd_core(const struct ieee80211_regdomain *rd)
3774 if (!is_world_regdom(rd->alpha2))
3776 update_world_regdomain(rd);
3780 static int reg_set_rd_user(const struct ieee80211_regdomain *rd,
3781 struct regulatory_request *user_request)
3783 const struct ieee80211_regdomain *intersected_rd = NULL;
3785 if (!regdom_changes(rd->alpha2))
3788 if (!is_valid_rd(rd)) {
3789 pr_err("Invalid regulatory domain detected: %c%c\n",
3790 rd->alpha2[0], rd->alpha2[1]);
3791 print_regdomain_info(rd);
3795 if (!user_request->intersect) {
3796 reset_regdomains(false, rd);
3800 intersected_rd = regdom_intersect(rd, get_cfg80211_regdom());
3801 if (!intersected_rd)
3806 reset_regdomains(false, intersected_rd);
3811 static int reg_set_rd_driver(const struct ieee80211_regdomain *rd,
3812 struct regulatory_request *driver_request)
3814 const struct ieee80211_regdomain *regd;
3815 const struct ieee80211_regdomain *intersected_rd = NULL;
3816 const struct ieee80211_regdomain *tmp;
3817 struct wiphy *request_wiphy;
3819 if (is_world_regdom(rd->alpha2))
3822 if (!regdom_changes(rd->alpha2))
3825 if (!is_valid_rd(rd)) {
3826 pr_err("Invalid regulatory domain detected: %c%c\n",
3827 rd->alpha2[0], rd->alpha2[1]);
3828 print_regdomain_info(rd);
3832 request_wiphy = wiphy_idx_to_wiphy(driver_request->wiphy_idx);
3836 if (!driver_request->intersect) {
3838 wiphy_lock(request_wiphy);
3839 if (request_wiphy->regd) {
3840 wiphy_unlock(request_wiphy);
3844 regd = reg_copy_regd(rd);
3846 wiphy_unlock(request_wiphy);
3847 return PTR_ERR(regd);
3850 rcu_assign_pointer(request_wiphy->regd, regd);
3851 wiphy_unlock(request_wiphy);
3852 reset_regdomains(false, rd);
3856 intersected_rd = regdom_intersect(rd, get_cfg80211_regdom());
3857 if (!intersected_rd)
3861 * We can trash what CRDA provided now.
3862 * However if a driver requested this specific regulatory
3863 * domain we keep it for its private use
3865 tmp = get_wiphy_regdom(request_wiphy);
3866 rcu_assign_pointer(request_wiphy->regd, rd);
3867 rcu_free_regdom(tmp);
3871 reset_regdomains(false, intersected_rd);
3876 static int reg_set_rd_country_ie(const struct ieee80211_regdomain *rd,
3877 struct regulatory_request *country_ie_request)
3879 struct wiphy *request_wiphy;
3881 if (!is_alpha2_set(rd->alpha2) && !is_an_alpha2(rd->alpha2) &&
3882 !is_unknown_alpha2(rd->alpha2))
3886 * Lets only bother proceeding on the same alpha2 if the current
3887 * rd is non static (it means CRDA was present and was used last)
3888 * and the pending request came in from a country IE
3891 if (!is_valid_rd(rd)) {
3892 pr_err("Invalid regulatory domain detected: %c%c\n",
3893 rd->alpha2[0], rd->alpha2[1]);
3894 print_regdomain_info(rd);
3898 request_wiphy = wiphy_idx_to_wiphy(country_ie_request->wiphy_idx);
3902 if (country_ie_request->intersect)
3905 reset_regdomains(false, rd);
3910 * Use this call to set the current regulatory domain. Conflicts with
3911 * multiple drivers can be ironed out later. Caller must've already
3912 * kmalloc'd the rd structure.
3914 int set_regdom(const struct ieee80211_regdomain *rd,
3915 enum ieee80211_regd_source regd_src)
3917 struct regulatory_request *lr;
3918 bool user_reset = false;
3921 if (IS_ERR_OR_NULL(rd))
3924 if (!reg_is_valid_request(rd->alpha2)) {
3929 if (regd_src == REGD_SOURCE_CRDA)
3930 reset_crda_timeouts();
3932 lr = get_last_request();
3934 /* Note that this doesn't update the wiphys, this is done below */
3935 switch (lr->initiator) {
3936 case NL80211_REGDOM_SET_BY_CORE:
3937 r = reg_set_rd_core(rd);
3939 case NL80211_REGDOM_SET_BY_USER:
3940 cfg80211_save_user_regdom(rd);
3941 r = reg_set_rd_user(rd, lr);
3944 case NL80211_REGDOM_SET_BY_DRIVER:
3945 r = reg_set_rd_driver(rd, lr);
3947 case NL80211_REGDOM_SET_BY_COUNTRY_IE:
3948 r = reg_set_rd_country_ie(rd, lr);
3951 WARN(1, "invalid initiator %d\n", lr->initiator);
3959 reg_set_request_processed();
3962 /* Back to world regulatory in case of errors */
3963 restore_regulatory_settings(user_reset, false);
3970 /* This would make this whole thing pointless */
3971 if (WARN_ON(!lr->intersect && rd != get_cfg80211_regdom()))
3974 /* update all wiphys now with the new established regulatory domain */
3975 update_all_wiphy_regulatory(lr->initiator);
3977 print_regdomain(get_cfg80211_regdom());
3979 nl80211_send_reg_change_event(lr);
3981 reg_set_request_processed();
3986 static int __regulatory_set_wiphy_regd(struct wiphy *wiphy,
3987 struct ieee80211_regdomain *rd)
3989 const struct ieee80211_regdomain *regd;
3990 const struct ieee80211_regdomain *prev_regd;
3991 struct cfg80211_registered_device *rdev;
3993 if (WARN_ON(!wiphy || !rd))
3996 if (WARN(!(wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED),
3997 "wiphy should have REGULATORY_WIPHY_SELF_MANAGED\n"))
4000 if (WARN(!is_valid_rd(rd),
4001 "Invalid regulatory domain detected: %c%c\n",
4002 rd->alpha2[0], rd->alpha2[1])) {
4003 print_regdomain_info(rd);
4007 regd = reg_copy_regd(rd);
4009 return PTR_ERR(regd);
4011 rdev = wiphy_to_rdev(wiphy);
4013 spin_lock(®_requests_lock);
4014 prev_regd = rdev->requested_regd;
4015 rdev->requested_regd = regd;
4016 spin_unlock(®_requests_lock);
4022 int regulatory_set_wiphy_regd(struct wiphy *wiphy,
4023 struct ieee80211_regdomain *rd)
4025 int ret = __regulatory_set_wiphy_regd(wiphy, rd);
4030 schedule_work(®_work);
4033 EXPORT_SYMBOL(regulatory_set_wiphy_regd);
4035 int regulatory_set_wiphy_regd_sync(struct wiphy *wiphy,
4036 struct ieee80211_regdomain *rd)
4042 ret = __regulatory_set_wiphy_regd(wiphy, rd);
4046 /* process the request immediately */
4047 reg_process_self_managed_hint(wiphy);
4048 reg_check_channels();
4051 EXPORT_SYMBOL(regulatory_set_wiphy_regd_sync);
4053 void wiphy_regulatory_register(struct wiphy *wiphy)
4055 struct regulatory_request *lr = get_last_request();
4057 /* self-managed devices ignore beacon hints and country IE */
4058 if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) {
4059 wiphy->regulatory_flags |= REGULATORY_DISABLE_BEACON_HINTS |
4060 REGULATORY_COUNTRY_IE_IGNORE;
4063 * The last request may have been received before this
4064 * registration call. Call the driver notifier if
4065 * initiator is USER.
4067 if (lr->initiator == NL80211_REGDOM_SET_BY_USER)
4068 reg_call_notifier(wiphy, lr);
4071 if (!reg_dev_ignore_cell_hint(wiphy))
4072 reg_num_devs_support_basehint++;
4074 wiphy_update_regulatory(wiphy, lr->initiator);
4075 wiphy_all_share_dfs_chan_state(wiphy);
4076 reg_process_self_managed_hints();
4079 void wiphy_regulatory_deregister(struct wiphy *wiphy)
4081 struct wiphy *request_wiphy = NULL;
4082 struct regulatory_request *lr;
4084 lr = get_last_request();
4086 if (!reg_dev_ignore_cell_hint(wiphy))
4087 reg_num_devs_support_basehint--;
4089 rcu_free_regdom(get_wiphy_regdom(wiphy));
4090 RCU_INIT_POINTER(wiphy->regd, NULL);
4093 request_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx);
4095 if (!request_wiphy || request_wiphy != wiphy)
4098 lr->wiphy_idx = WIPHY_IDX_INVALID;
4099 lr->country_ie_env = ENVIRON_ANY;
4103 * See FCC notices for UNII band definitions
4104 * 5GHz: https://www.fcc.gov/document/5-ghz-unlicensed-spectrum-unii
4105 * 6GHz: https://www.fcc.gov/document/fcc-proposes-more-spectrum-unlicensed-use-0
4107 int cfg80211_get_unii(int freq)
4110 if (freq >= 5150 && freq <= 5250)
4114 if (freq > 5250 && freq <= 5350)
4118 if (freq > 5350 && freq <= 5470)
4122 if (freq > 5470 && freq <= 5725)
4126 if (freq > 5725 && freq <= 5825)
4130 if (freq > 5925 && freq <= 6425)
4134 if (freq > 6425 && freq <= 6525)
4138 if (freq > 6525 && freq <= 6875)
4142 if (freq > 6875 && freq <= 7125)
4148 bool regulatory_indoor_allowed(void)
4150 return reg_is_indoor;
4153 bool regulatory_pre_cac_allowed(struct wiphy *wiphy)
4155 const struct ieee80211_regdomain *regd = NULL;
4156 const struct ieee80211_regdomain *wiphy_regd = NULL;
4157 bool pre_cac_allowed = false;
4161 regd = rcu_dereference(cfg80211_regdomain);
4162 wiphy_regd = rcu_dereference(wiphy->regd);
4164 if (regd->dfs_region == NL80211_DFS_ETSI)
4165 pre_cac_allowed = true;
4169 return pre_cac_allowed;
4172 if (regd->dfs_region == wiphy_regd->dfs_region &&
4173 wiphy_regd->dfs_region == NL80211_DFS_ETSI)
4174 pre_cac_allowed = true;
4178 return pre_cac_allowed;
4180 EXPORT_SYMBOL(regulatory_pre_cac_allowed);
4182 static void cfg80211_check_and_end_cac(struct cfg80211_registered_device *rdev)
4184 struct wireless_dev *wdev;
4185 /* If we finished CAC or received radar, we should end any
4186 * CAC running on the same channels.
4187 * the check !cfg80211_chandef_dfs_usable contain 2 options:
4188 * either all channels are available - those the CAC_FINISHED
4189 * event has effected another wdev state, or there is a channel
4190 * in unavailable state in wdev chandef - those the RADAR_DETECTED
4191 * event has effected another wdev state.
4192 * In both cases we should end the CAC on the wdev.
4194 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
4195 if (wdev->cac_started &&
4196 !cfg80211_chandef_dfs_usable(&rdev->wiphy, &wdev->chandef))
4197 rdev_end_cac(rdev, wdev->netdev);
4201 void regulatory_propagate_dfs_state(struct wiphy *wiphy,
4202 struct cfg80211_chan_def *chandef,
4203 enum nl80211_dfs_state dfs_state,
4204 enum nl80211_radar_event event)
4206 struct cfg80211_registered_device *rdev;
4210 if (WARN_ON(!cfg80211_chandef_valid(chandef)))
4213 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
4214 if (wiphy == &rdev->wiphy)
4217 if (!reg_dfs_domain_same(wiphy, &rdev->wiphy))
4220 if (!ieee80211_get_channel(&rdev->wiphy,
4221 chandef->chan->center_freq))
4224 cfg80211_set_dfs_state(&rdev->wiphy, chandef, dfs_state);
4226 if (event == NL80211_RADAR_DETECTED ||
4227 event == NL80211_RADAR_CAC_FINISHED) {
4228 cfg80211_sched_dfs_chan_update(rdev);
4229 cfg80211_check_and_end_cac(rdev);
4232 nl80211_radar_notify(rdev, chandef, event, NULL, GFP_KERNEL);
4236 static int __init regulatory_init_db(void)
4241 * It's possible that - due to other bugs/issues - cfg80211
4242 * never called regulatory_init() below, or that it failed;
4243 * in that case, don't try to do any further work here as
4244 * it's doomed to lead to crashes.
4246 if (IS_ERR_OR_NULL(reg_pdev))
4249 err = load_builtin_regdb_keys();
4251 platform_device_unregister(reg_pdev);
4255 /* We always try to get an update for the static regdomain */
4256 err = regulatory_hint_core(cfg80211_world_regdom->alpha2);
4258 if (err == -ENOMEM) {
4259 platform_device_unregister(reg_pdev);
4263 * N.B. kobject_uevent_env() can fail mainly for when we're out
4264 * memory which is handled and propagated appropriately above
4265 * but it can also fail during a netlink_broadcast() or during
4266 * early boot for call_usermodehelper(). For now treat these
4267 * errors as non-fatal.
4269 pr_err("kobject_uevent_env() was unable to call CRDA during init\n");
4273 * Finally, if the user set the module parameter treat it
4276 if (!is_world_regdom(ieee80211_regdom))
4277 regulatory_hint_user(ieee80211_regdom,
4278 NL80211_USER_REG_HINT_USER);
4283 late_initcall(regulatory_init_db);
4286 int __init regulatory_init(void)
4288 reg_pdev = platform_device_register_simple("regulatory", 0, NULL, 0);
4289 if (IS_ERR(reg_pdev))
4290 return PTR_ERR(reg_pdev);
4292 rcu_assign_pointer(cfg80211_regdomain, cfg80211_world_regdom);
4294 user_alpha2[0] = '9';
4295 user_alpha2[1] = '7';
4298 return regulatory_init_db();
4304 void regulatory_exit(void)
4306 struct regulatory_request *reg_request, *tmp;
4307 struct reg_beacon *reg_beacon, *btmp;
4309 cancel_work_sync(®_work);
4310 cancel_crda_timeout_sync();
4311 cancel_delayed_work_sync(®_check_chans);
4313 /* Lock to suppress warnings */
4315 reset_regdomains(true, NULL);
4318 dev_set_uevent_suppress(®_pdev->dev, true);
4320 platform_device_unregister(reg_pdev);
4322 list_for_each_entry_safe(reg_beacon, btmp, ®_pending_beacons, list) {
4323 list_del(®_beacon->list);
4327 list_for_each_entry_safe(reg_beacon, btmp, ®_beacon_list, list) {
4328 list_del(®_beacon->list);
4332 list_for_each_entry_safe(reg_request, tmp, ®_requests_list, list) {
4333 list_del(®_request->list);
4337 if (!IS_ERR_OR_NULL(regdb))
4339 if (!IS_ERR_OR_NULL(cfg80211_user_regdom))
4340 kfree(cfg80211_user_regdom);
4342 free_regdb_keyring();