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 - 2023 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);
136 static void reg_process_hint(struct regulatory_request *reg_request);
138 static const struct ieee80211_regdomain *get_cfg80211_regdom(void)
140 return rcu_dereference_rtnl(cfg80211_regdomain);
144 * Returns the regulatory domain associated with the wiphy.
146 * Requires any of RTNL, wiphy mutex or RCU protection.
148 const struct ieee80211_regdomain *get_wiphy_regdom(struct wiphy *wiphy)
150 return rcu_dereference_check(wiphy->regd,
151 lockdep_is_held(&wiphy->mtx) ||
152 lockdep_rtnl_is_held());
154 EXPORT_SYMBOL(get_wiphy_regdom);
156 static const char *reg_dfs_region_str(enum nl80211_dfs_regions dfs_region)
158 switch (dfs_region) {
159 case NL80211_DFS_UNSET:
161 case NL80211_DFS_FCC:
163 case NL80211_DFS_ETSI:
171 enum nl80211_dfs_regions reg_get_dfs_region(struct wiphy *wiphy)
173 const struct ieee80211_regdomain *regd = NULL;
174 const struct ieee80211_regdomain *wiphy_regd = NULL;
175 enum nl80211_dfs_regions dfs_region;
178 regd = get_cfg80211_regdom();
179 dfs_region = regd->dfs_region;
184 wiphy_regd = get_wiphy_regdom(wiphy);
188 if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) {
189 dfs_region = wiphy_regd->dfs_region;
193 if (wiphy_regd->dfs_region == regd->dfs_region)
196 pr_debug("%s: device specific dfs_region (%s) disagrees with cfg80211's central dfs_region (%s)\n",
197 dev_name(&wiphy->dev),
198 reg_dfs_region_str(wiphy_regd->dfs_region),
199 reg_dfs_region_str(regd->dfs_region));
207 static void rcu_free_regdom(const struct ieee80211_regdomain *r)
211 kfree_rcu((struct ieee80211_regdomain *)r, rcu_head);
214 static struct regulatory_request *get_last_request(void)
216 return rcu_dereference_rtnl(last_request);
219 /* Used to queue up regulatory hints */
220 static LIST_HEAD(reg_requests_list);
221 static DEFINE_SPINLOCK(reg_requests_lock);
223 /* Used to queue up beacon hints for review */
224 static LIST_HEAD(reg_pending_beacons);
225 static DEFINE_SPINLOCK(reg_pending_beacons_lock);
227 /* Used to keep track of processed beacon hints */
228 static LIST_HEAD(reg_beacon_list);
231 struct list_head list;
232 struct ieee80211_channel chan;
235 static void reg_check_chans_work(struct work_struct *work);
236 static DECLARE_DELAYED_WORK(reg_check_chans, reg_check_chans_work);
238 static void reg_todo(struct work_struct *work);
239 static DECLARE_WORK(reg_work, reg_todo);
241 /* We keep a static world regulatory domain in case of the absence of CRDA */
242 static const struct ieee80211_regdomain world_regdom = {
246 /* IEEE 802.11b/g, channels 1..11 */
247 REG_RULE(2412-10, 2462+10, 40, 6, 20, 0),
248 /* IEEE 802.11b/g, channels 12..13. */
249 REG_RULE(2467-10, 2472+10, 20, 6, 20,
250 NL80211_RRF_NO_IR | NL80211_RRF_AUTO_BW),
251 /* IEEE 802.11 channel 14 - Only JP enables
252 * this and for 802.11b only */
253 REG_RULE(2484-10, 2484+10, 20, 6, 20,
255 NL80211_RRF_NO_OFDM),
256 /* IEEE 802.11a, channel 36..48 */
257 REG_RULE(5180-10, 5240+10, 80, 6, 20,
259 NL80211_RRF_AUTO_BW),
261 /* IEEE 802.11a, channel 52..64 - DFS required */
262 REG_RULE(5260-10, 5320+10, 80, 6, 20,
264 NL80211_RRF_AUTO_BW |
267 /* IEEE 802.11a, channel 100..144 - DFS required */
268 REG_RULE(5500-10, 5720+10, 160, 6, 20,
272 /* IEEE 802.11a, channel 149..165 */
273 REG_RULE(5745-10, 5825+10, 80, 6, 20,
276 /* IEEE 802.11ad (60GHz), channels 1..3 */
277 REG_RULE(56160+2160*1-1080, 56160+2160*3+1080, 2160, 0, 0, 0),
281 /* protected by RTNL */
282 static const struct ieee80211_regdomain *cfg80211_world_regdom =
285 static char *ieee80211_regdom = "00";
286 static char user_alpha2[2];
287 static const struct ieee80211_regdomain *cfg80211_user_regdom;
289 module_param(ieee80211_regdom, charp, 0444);
290 MODULE_PARM_DESC(ieee80211_regdom, "IEEE 802.11 regulatory domain code");
292 static void reg_free_request(struct regulatory_request *request)
294 if (request == &core_request_world)
297 if (request != get_last_request())
301 static void reg_free_last_request(void)
303 struct regulatory_request *lr = get_last_request();
305 if (lr != &core_request_world && lr)
306 kfree_rcu(lr, rcu_head);
309 static void reg_update_last_request(struct regulatory_request *request)
311 struct regulatory_request *lr;
313 lr = get_last_request();
317 reg_free_last_request();
318 rcu_assign_pointer(last_request, request);
321 static void reset_regdomains(bool full_reset,
322 const struct ieee80211_regdomain *new_regdom)
324 const struct ieee80211_regdomain *r;
328 r = get_cfg80211_regdom();
330 /* avoid freeing static information or freeing something twice */
331 if (r == cfg80211_world_regdom)
333 if (cfg80211_world_regdom == &world_regdom)
334 cfg80211_world_regdom = NULL;
335 if (r == &world_regdom)
339 rcu_free_regdom(cfg80211_world_regdom);
341 cfg80211_world_regdom = &world_regdom;
342 rcu_assign_pointer(cfg80211_regdomain, new_regdom);
347 reg_update_last_request(&core_request_world);
351 * Dynamic world regulatory domain requested by the wireless
352 * core upon initialization
354 static void update_world_regdomain(const struct ieee80211_regdomain *rd)
356 struct regulatory_request *lr;
358 lr = get_last_request();
362 reset_regdomains(false, rd);
364 cfg80211_world_regdom = rd;
367 bool is_world_regdom(const char *alpha2)
371 return alpha2[0] == '0' && alpha2[1] == '0';
374 static bool is_alpha2_set(const char *alpha2)
378 return alpha2[0] && alpha2[1];
381 static bool is_unknown_alpha2(const char *alpha2)
386 * Special case where regulatory domain was built by driver
387 * but a specific alpha2 cannot be determined
389 return alpha2[0] == '9' && alpha2[1] == '9';
392 static bool is_intersected_alpha2(const char *alpha2)
397 * Special case where regulatory domain is the
398 * result of an intersection between two regulatory domain
401 return alpha2[0] == '9' && alpha2[1] == '8';
404 static bool is_an_alpha2(const char *alpha2)
408 return isalpha(alpha2[0]) && isalpha(alpha2[1]);
411 static bool alpha2_equal(const char *alpha2_x, const char *alpha2_y)
413 if (!alpha2_x || !alpha2_y)
415 return alpha2_x[0] == alpha2_y[0] && alpha2_x[1] == alpha2_y[1];
418 static bool regdom_changes(const char *alpha2)
420 const struct ieee80211_regdomain *r = get_cfg80211_regdom();
424 return !alpha2_equal(r->alpha2, alpha2);
428 * The NL80211_REGDOM_SET_BY_USER regdom alpha2 is cached, this lets
429 * you know if a valid regulatory hint with NL80211_REGDOM_SET_BY_USER
430 * has ever been issued.
432 static bool is_user_regdom_saved(void)
434 if (user_alpha2[0] == '9' && user_alpha2[1] == '7')
437 /* This would indicate a mistake on the design */
438 if (WARN(!is_world_regdom(user_alpha2) && !is_an_alpha2(user_alpha2),
439 "Unexpected user alpha2: %c%c\n",
440 user_alpha2[0], user_alpha2[1]))
446 static const struct ieee80211_regdomain *
447 reg_copy_regd(const struct ieee80211_regdomain *src_regd)
449 struct ieee80211_regdomain *regd;
452 regd = kzalloc(struct_size(regd, reg_rules, src_regd->n_reg_rules),
455 return ERR_PTR(-ENOMEM);
457 memcpy(regd, src_regd, sizeof(struct ieee80211_regdomain));
459 for (i = 0; i < src_regd->n_reg_rules; i++)
460 memcpy(®d->reg_rules[i], &src_regd->reg_rules[i],
461 sizeof(struct ieee80211_reg_rule));
466 static void cfg80211_save_user_regdom(const struct ieee80211_regdomain *rd)
470 if (!IS_ERR(cfg80211_user_regdom))
471 kfree(cfg80211_user_regdom);
472 cfg80211_user_regdom = reg_copy_regd(rd);
475 struct reg_regdb_apply_request {
476 struct list_head list;
477 const struct ieee80211_regdomain *regdom;
480 static LIST_HEAD(reg_regdb_apply_list);
481 static DEFINE_MUTEX(reg_regdb_apply_mutex);
483 static void reg_regdb_apply(struct work_struct *work)
485 struct reg_regdb_apply_request *request;
489 mutex_lock(®_regdb_apply_mutex);
490 while (!list_empty(®_regdb_apply_list)) {
491 request = list_first_entry(®_regdb_apply_list,
492 struct reg_regdb_apply_request,
494 list_del(&request->list);
496 set_regdom(request->regdom, REGD_SOURCE_INTERNAL_DB);
499 mutex_unlock(®_regdb_apply_mutex);
504 static DECLARE_WORK(reg_regdb_work, reg_regdb_apply);
506 static int reg_schedule_apply(const struct ieee80211_regdomain *regdom)
508 struct reg_regdb_apply_request *request;
510 request = kzalloc(sizeof(struct reg_regdb_apply_request), GFP_KERNEL);
516 request->regdom = regdom;
518 mutex_lock(®_regdb_apply_mutex);
519 list_add_tail(&request->list, ®_regdb_apply_list);
520 mutex_unlock(®_regdb_apply_mutex);
522 schedule_work(®_regdb_work);
526 #ifdef CONFIG_CFG80211_CRDA_SUPPORT
527 /* Max number of consecutive attempts to communicate with CRDA */
528 #define REG_MAX_CRDA_TIMEOUTS 10
530 static u32 reg_crda_timeouts;
532 static void crda_timeout_work(struct work_struct *work);
533 static DECLARE_DELAYED_WORK(crda_timeout, crda_timeout_work);
535 static void crda_timeout_work(struct work_struct *work)
537 pr_debug("Timeout while waiting for CRDA to reply, restoring regulatory settings\n");
540 restore_regulatory_settings(true, false);
544 static void cancel_crda_timeout(void)
546 cancel_delayed_work(&crda_timeout);
549 static void cancel_crda_timeout_sync(void)
551 cancel_delayed_work_sync(&crda_timeout);
554 static void reset_crda_timeouts(void)
556 reg_crda_timeouts = 0;
560 * This lets us keep regulatory code which is updated on a regulatory
561 * basis in userspace.
563 static int call_crda(const char *alpha2)
566 char *env[] = { country, NULL };
569 snprintf(country, sizeof(country), "COUNTRY=%c%c",
570 alpha2[0], alpha2[1]);
572 if (reg_crda_timeouts > REG_MAX_CRDA_TIMEOUTS) {
573 pr_debug("Exceeded CRDA call max attempts. Not calling CRDA\n");
577 if (!is_world_regdom((char *) alpha2))
578 pr_debug("Calling CRDA for country: %c%c\n",
579 alpha2[0], alpha2[1]);
581 pr_debug("Calling CRDA to update world regulatory domain\n");
583 ret = kobject_uevent_env(®_pdev->dev.kobj, KOBJ_CHANGE, env);
587 queue_delayed_work(system_power_efficient_wq,
588 &crda_timeout, msecs_to_jiffies(3142));
592 static inline void cancel_crda_timeout(void) {}
593 static inline void cancel_crda_timeout_sync(void) {}
594 static inline void reset_crda_timeouts(void) {}
595 static inline int call_crda(const char *alpha2)
599 #endif /* CONFIG_CFG80211_CRDA_SUPPORT */
601 /* code to directly load a firmware database through request_firmware */
602 static const struct fwdb_header *regdb;
604 struct fwdb_country {
607 /* this struct cannot be extended */
608 } __packed __aligned(4);
610 struct fwdb_collection {
614 /* no optional data yet */
615 /* aligned to 2, then followed by __be16 array of rule pointers */
616 } __packed __aligned(4);
619 FWDB_FLAG_NO_OFDM = BIT(0),
620 FWDB_FLAG_NO_OUTDOOR = BIT(1),
621 FWDB_FLAG_DFS = BIT(2),
622 FWDB_FLAG_NO_IR = BIT(3),
623 FWDB_FLAG_AUTO_BW = BIT(4),
632 struct fwdb_wmm_rule {
633 struct fwdb_wmm_ac client[IEEE80211_NUM_ACS];
634 struct fwdb_wmm_ac ap[IEEE80211_NUM_ACS];
641 __be32 start, end, max_bw;
642 /* start of optional data */
645 } __packed __aligned(4);
647 #define FWDB_MAGIC 0x52474442
648 #define FWDB_VERSION 20
653 struct fwdb_country country[];
654 } __packed __aligned(4);
656 static int ecw2cw(int ecw)
658 return (1 << ecw) - 1;
661 static bool valid_wmm(struct fwdb_wmm_rule *rule)
663 struct fwdb_wmm_ac *ac = (struct fwdb_wmm_ac *)rule;
666 for (i = 0; i < IEEE80211_NUM_ACS * 2; i++) {
667 u16 cw_min = ecw2cw((ac[i].ecw & 0xf0) >> 4);
668 u16 cw_max = ecw2cw(ac[i].ecw & 0x0f);
669 u8 aifsn = ac[i].aifsn;
671 if (cw_min >= cw_max)
681 static bool valid_rule(const u8 *data, unsigned int size, u16 rule_ptr)
683 struct fwdb_rule *rule = (void *)(data + (rule_ptr << 2));
685 if ((u8 *)rule + sizeof(rule->len) > data + size)
688 /* mandatory fields */
689 if (rule->len < offsetofend(struct fwdb_rule, max_bw))
691 if (rule->len >= offsetofend(struct fwdb_rule, wmm_ptr)) {
692 u32 wmm_ptr = be16_to_cpu(rule->wmm_ptr) << 2;
693 struct fwdb_wmm_rule *wmm;
695 if (wmm_ptr + sizeof(struct fwdb_wmm_rule) > size)
698 wmm = (void *)(data + wmm_ptr);
706 static bool valid_country(const u8 *data, unsigned int size,
707 const struct fwdb_country *country)
709 unsigned int ptr = be16_to_cpu(country->coll_ptr) << 2;
710 struct fwdb_collection *coll = (void *)(data + ptr);
714 /* make sure we can read len/n_rules */
715 if ((u8 *)coll + offsetofend(typeof(*coll), n_rules) > data + size)
718 /* make sure base struct and all rules fit */
719 if ((u8 *)coll + ALIGN(coll->len, 2) +
720 (coll->n_rules * 2) > data + size)
723 /* mandatory fields must exist */
724 if (coll->len < offsetofend(struct fwdb_collection, dfs_region))
727 rules_ptr = (void *)((u8 *)coll + ALIGN(coll->len, 2));
729 for (i = 0; i < coll->n_rules; i++) {
730 u16 rule_ptr = be16_to_cpu(rules_ptr[i]);
732 if (!valid_rule(data, size, rule_ptr))
739 #ifdef CONFIG_CFG80211_REQUIRE_SIGNED_REGDB
740 #include <keys/asymmetric-type.h>
742 static struct key *builtin_regdb_keys;
744 static int __init load_builtin_regdb_keys(void)
747 keyring_alloc(".builtin_regdb_keys",
748 KUIDT_INIT(0), KGIDT_INIT(0), current_cred(),
749 ((KEY_POS_ALL & ~KEY_POS_SETATTR) |
750 KEY_USR_VIEW | KEY_USR_READ | KEY_USR_SEARCH),
751 KEY_ALLOC_NOT_IN_QUOTA, NULL, NULL);
752 if (IS_ERR(builtin_regdb_keys))
753 return PTR_ERR(builtin_regdb_keys);
755 pr_notice("Loading compiled-in X.509 certificates for regulatory database\n");
757 #ifdef CONFIG_CFG80211_USE_KERNEL_REGDB_KEYS
758 x509_load_certificate_list(shipped_regdb_certs,
759 shipped_regdb_certs_len,
762 #ifdef CONFIG_CFG80211_EXTRA_REGDB_KEYDIR
763 if (CONFIG_CFG80211_EXTRA_REGDB_KEYDIR[0] != '\0')
764 x509_load_certificate_list(extra_regdb_certs,
765 extra_regdb_certs_len,
772 MODULE_FIRMWARE("regulatory.db.p7s");
774 static bool regdb_has_valid_signature(const u8 *data, unsigned int size)
776 const struct firmware *sig;
779 if (request_firmware(&sig, "regulatory.db.p7s", ®_pdev->dev))
782 result = verify_pkcs7_signature(data, size, sig->data, sig->size,
784 VERIFYING_UNSPECIFIED_SIGNATURE,
787 release_firmware(sig);
792 static void free_regdb_keyring(void)
794 key_put(builtin_regdb_keys);
797 static int load_builtin_regdb_keys(void)
802 static bool regdb_has_valid_signature(const u8 *data, unsigned int size)
807 static void free_regdb_keyring(void)
810 #endif /* CONFIG_CFG80211_REQUIRE_SIGNED_REGDB */
812 static bool valid_regdb(const u8 *data, unsigned int size)
814 const struct fwdb_header *hdr = (void *)data;
815 const struct fwdb_country *country;
817 if (size < sizeof(*hdr))
820 if (hdr->magic != cpu_to_be32(FWDB_MAGIC))
823 if (hdr->version != cpu_to_be32(FWDB_VERSION))
826 if (!regdb_has_valid_signature(data, size))
829 country = &hdr->country[0];
830 while ((u8 *)(country + 1) <= data + size) {
831 if (!country->coll_ptr)
833 if (!valid_country(data, size, country))
841 static void set_wmm_rule(const struct fwdb_header *db,
842 const struct fwdb_country *country,
843 const struct fwdb_rule *rule,
844 struct ieee80211_reg_rule *rrule)
846 struct ieee80211_wmm_rule *wmm_rule = &rrule->wmm_rule;
847 struct fwdb_wmm_rule *wmm;
848 unsigned int i, wmm_ptr;
850 wmm_ptr = be16_to_cpu(rule->wmm_ptr) << 2;
851 wmm = (void *)((u8 *)db + wmm_ptr);
853 if (!valid_wmm(wmm)) {
854 pr_err("Invalid regulatory WMM rule %u-%u in domain %c%c\n",
855 be32_to_cpu(rule->start), be32_to_cpu(rule->end),
856 country->alpha2[0], country->alpha2[1]);
860 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
861 wmm_rule->client[i].cw_min =
862 ecw2cw((wmm->client[i].ecw & 0xf0) >> 4);
863 wmm_rule->client[i].cw_max = ecw2cw(wmm->client[i].ecw & 0x0f);
864 wmm_rule->client[i].aifsn = wmm->client[i].aifsn;
865 wmm_rule->client[i].cot =
866 1000 * be16_to_cpu(wmm->client[i].cot);
867 wmm_rule->ap[i].cw_min = ecw2cw((wmm->ap[i].ecw & 0xf0) >> 4);
868 wmm_rule->ap[i].cw_max = ecw2cw(wmm->ap[i].ecw & 0x0f);
869 wmm_rule->ap[i].aifsn = wmm->ap[i].aifsn;
870 wmm_rule->ap[i].cot = 1000 * be16_to_cpu(wmm->ap[i].cot);
873 rrule->has_wmm = true;
876 static int __regdb_query_wmm(const struct fwdb_header *db,
877 const struct fwdb_country *country, int freq,
878 struct ieee80211_reg_rule *rrule)
880 unsigned int ptr = be16_to_cpu(country->coll_ptr) << 2;
881 struct fwdb_collection *coll = (void *)((u8 *)db + ptr);
884 for (i = 0; i < coll->n_rules; i++) {
885 __be16 *rules_ptr = (void *)((u8 *)coll + ALIGN(coll->len, 2));
886 unsigned int rule_ptr = be16_to_cpu(rules_ptr[i]) << 2;
887 struct fwdb_rule *rule = (void *)((u8 *)db + rule_ptr);
889 if (rule->len < offsetofend(struct fwdb_rule, wmm_ptr))
892 if (freq >= KHZ_TO_MHZ(be32_to_cpu(rule->start)) &&
893 freq <= KHZ_TO_MHZ(be32_to_cpu(rule->end))) {
894 set_wmm_rule(db, country, rule, rrule);
902 int reg_query_regdb_wmm(char *alpha2, int freq, struct ieee80211_reg_rule *rule)
904 const struct fwdb_header *hdr = regdb;
905 const struct fwdb_country *country;
911 return PTR_ERR(regdb);
913 country = &hdr->country[0];
914 while (country->coll_ptr) {
915 if (alpha2_equal(alpha2, country->alpha2))
916 return __regdb_query_wmm(regdb, country, freq, rule);
923 EXPORT_SYMBOL(reg_query_regdb_wmm);
925 static int regdb_query_country(const struct fwdb_header *db,
926 const struct fwdb_country *country)
928 unsigned int ptr = be16_to_cpu(country->coll_ptr) << 2;
929 struct fwdb_collection *coll = (void *)((u8 *)db + ptr);
930 struct ieee80211_regdomain *regdom;
933 regdom = kzalloc(struct_size(regdom, reg_rules, coll->n_rules),
938 regdom->n_reg_rules = coll->n_rules;
939 regdom->alpha2[0] = country->alpha2[0];
940 regdom->alpha2[1] = country->alpha2[1];
941 regdom->dfs_region = coll->dfs_region;
943 for (i = 0; i < regdom->n_reg_rules; i++) {
944 __be16 *rules_ptr = (void *)((u8 *)coll + ALIGN(coll->len, 2));
945 unsigned int rule_ptr = be16_to_cpu(rules_ptr[i]) << 2;
946 struct fwdb_rule *rule = (void *)((u8 *)db + rule_ptr);
947 struct ieee80211_reg_rule *rrule = ®dom->reg_rules[i];
949 rrule->freq_range.start_freq_khz = be32_to_cpu(rule->start);
950 rrule->freq_range.end_freq_khz = be32_to_cpu(rule->end);
951 rrule->freq_range.max_bandwidth_khz = be32_to_cpu(rule->max_bw);
953 rrule->power_rule.max_antenna_gain = 0;
954 rrule->power_rule.max_eirp = be16_to_cpu(rule->max_eirp);
957 if (rule->flags & FWDB_FLAG_NO_OFDM)
958 rrule->flags |= NL80211_RRF_NO_OFDM;
959 if (rule->flags & FWDB_FLAG_NO_OUTDOOR)
960 rrule->flags |= NL80211_RRF_NO_OUTDOOR;
961 if (rule->flags & FWDB_FLAG_DFS)
962 rrule->flags |= NL80211_RRF_DFS;
963 if (rule->flags & FWDB_FLAG_NO_IR)
964 rrule->flags |= NL80211_RRF_NO_IR;
965 if (rule->flags & FWDB_FLAG_AUTO_BW)
966 rrule->flags |= NL80211_RRF_AUTO_BW;
968 rrule->dfs_cac_ms = 0;
970 /* handle optional data */
971 if (rule->len >= offsetofend(struct fwdb_rule, cac_timeout))
973 1000 * be16_to_cpu(rule->cac_timeout);
974 if (rule->len >= offsetofend(struct fwdb_rule, wmm_ptr))
975 set_wmm_rule(db, country, rule, rrule);
978 return reg_schedule_apply(regdom);
981 static int query_regdb(const char *alpha2)
983 const struct fwdb_header *hdr = regdb;
984 const struct fwdb_country *country;
989 return PTR_ERR(regdb);
991 country = &hdr->country[0];
992 while (country->coll_ptr) {
993 if (alpha2_equal(alpha2, country->alpha2))
994 return regdb_query_country(regdb, country);
1001 static void regdb_fw_cb(const struct firmware *fw, void *context)
1004 bool restore = true;
1008 pr_info("failed to load regulatory.db\n");
1009 set_error = -ENODATA;
1010 } else if (!valid_regdb(fw->data, fw->size)) {
1011 pr_info("loaded regulatory.db is malformed or signature is missing/invalid\n");
1012 set_error = -EINVAL;
1016 if (regdb && !IS_ERR(regdb)) {
1017 /* negative case - a bug
1018 * positive case - can happen due to race in case of multiple cb's in
1019 * queue, due to usage of asynchronous callback
1021 * Either case, just restore and free new db.
1023 } else if (set_error) {
1024 regdb = ERR_PTR(set_error);
1026 db = kmemdup(fw->data, fw->size, GFP_KERNEL);
1029 restore = context && query_regdb(context);
1036 restore_regulatory_settings(true, false);
1042 release_firmware(fw);
1045 MODULE_FIRMWARE("regulatory.db");
1047 static int query_regdb_file(const char *alpha2)
1054 return query_regdb(alpha2);
1056 alpha2 = kmemdup(alpha2, 2, GFP_KERNEL);
1060 err = request_firmware_nowait(THIS_MODULE, true, "regulatory.db",
1061 ®_pdev->dev, GFP_KERNEL,
1062 (void *)alpha2, regdb_fw_cb);
1069 int reg_reload_regdb(void)
1071 const struct firmware *fw;
1074 const struct ieee80211_regdomain *current_regdomain;
1075 struct regulatory_request *request;
1077 err = request_firmware(&fw, "regulatory.db", ®_pdev->dev);
1081 if (!valid_regdb(fw->data, fw->size)) {
1086 db = kmemdup(fw->data, fw->size, GFP_KERNEL);
1093 if (!IS_ERR_OR_NULL(regdb))
1097 /* reset regulatory domain */
1098 current_regdomain = get_cfg80211_regdom();
1100 request = kzalloc(sizeof(*request), GFP_KERNEL);
1106 request->wiphy_idx = WIPHY_IDX_INVALID;
1107 request->alpha2[0] = current_regdomain->alpha2[0];
1108 request->alpha2[1] = current_regdomain->alpha2[1];
1109 request->initiator = NL80211_REGDOM_SET_BY_CORE;
1110 request->user_reg_hint_type = NL80211_USER_REG_HINT_USER;
1112 reg_process_hint(request);
1117 release_firmware(fw);
1121 static bool reg_query_database(struct regulatory_request *request)
1123 if (query_regdb_file(request->alpha2) == 0)
1126 if (call_crda(request->alpha2) == 0)
1132 bool reg_is_valid_request(const char *alpha2)
1134 struct regulatory_request *lr = get_last_request();
1136 if (!lr || lr->processed)
1139 return alpha2_equal(lr->alpha2, alpha2);
1142 static const struct ieee80211_regdomain *reg_get_regdomain(struct wiphy *wiphy)
1144 struct regulatory_request *lr = get_last_request();
1147 * Follow the driver's regulatory domain, if present, unless a country
1148 * IE has been processed or a user wants to help complaince further
1150 if (lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE &&
1151 lr->initiator != NL80211_REGDOM_SET_BY_USER &&
1153 return get_wiphy_regdom(wiphy);
1155 return get_cfg80211_regdom();
1159 reg_get_max_bandwidth_from_range(const struct ieee80211_regdomain *rd,
1160 const struct ieee80211_reg_rule *rule)
1162 const struct ieee80211_freq_range *freq_range = &rule->freq_range;
1163 const struct ieee80211_freq_range *freq_range_tmp;
1164 const struct ieee80211_reg_rule *tmp;
1165 u32 start_freq, end_freq, idx, no;
1167 for (idx = 0; idx < rd->n_reg_rules; idx++)
1168 if (rule == &rd->reg_rules[idx])
1171 if (idx == rd->n_reg_rules)
1174 /* get start_freq */
1178 tmp = &rd->reg_rules[--no];
1179 freq_range_tmp = &tmp->freq_range;
1181 if (freq_range_tmp->end_freq_khz < freq_range->start_freq_khz)
1184 freq_range = freq_range_tmp;
1187 start_freq = freq_range->start_freq_khz;
1190 freq_range = &rule->freq_range;
1193 while (no < rd->n_reg_rules - 1) {
1194 tmp = &rd->reg_rules[++no];
1195 freq_range_tmp = &tmp->freq_range;
1197 if (freq_range_tmp->start_freq_khz > freq_range->end_freq_khz)
1200 freq_range = freq_range_tmp;
1203 end_freq = freq_range->end_freq_khz;
1205 return end_freq - start_freq;
1208 unsigned int reg_get_max_bandwidth(const struct ieee80211_regdomain *rd,
1209 const struct ieee80211_reg_rule *rule)
1211 unsigned int bw = reg_get_max_bandwidth_from_range(rd, rule);
1213 if (rule->flags & NL80211_RRF_NO_320MHZ)
1214 bw = min_t(unsigned int, bw, MHZ_TO_KHZ(160));
1215 if (rule->flags & NL80211_RRF_NO_160MHZ)
1216 bw = min_t(unsigned int, bw, MHZ_TO_KHZ(80));
1217 if (rule->flags & NL80211_RRF_NO_80MHZ)
1218 bw = min_t(unsigned int, bw, MHZ_TO_KHZ(40));
1221 * HT40+/HT40- limits are handled per-channel. Only limit BW if both
1224 if (rule->flags & NL80211_RRF_NO_HT40MINUS &&
1225 rule->flags & NL80211_RRF_NO_HT40PLUS)
1226 bw = min_t(unsigned int, bw, MHZ_TO_KHZ(20));
1231 /* Sanity check on a regulatory rule */
1232 static bool is_valid_reg_rule(const struct ieee80211_reg_rule *rule)
1234 const struct ieee80211_freq_range *freq_range = &rule->freq_range;
1237 if (freq_range->start_freq_khz <= 0 || freq_range->end_freq_khz <= 0)
1240 if (freq_range->start_freq_khz > freq_range->end_freq_khz)
1243 freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz;
1245 if (freq_range->end_freq_khz <= freq_range->start_freq_khz ||
1246 freq_range->max_bandwidth_khz > freq_diff)
1252 static bool is_valid_rd(const struct ieee80211_regdomain *rd)
1254 const struct ieee80211_reg_rule *reg_rule = NULL;
1257 if (!rd->n_reg_rules)
1260 if (WARN_ON(rd->n_reg_rules > NL80211_MAX_SUPP_REG_RULES))
1263 for (i = 0; i < rd->n_reg_rules; i++) {
1264 reg_rule = &rd->reg_rules[i];
1265 if (!is_valid_reg_rule(reg_rule))
1273 * freq_in_rule_band - tells us if a frequency is in a frequency band
1274 * @freq_range: frequency rule we want to query
1275 * @freq_khz: frequency we are inquiring about
1277 * This lets us know if a specific frequency rule is or is not relevant to
1278 * a specific frequency's band. Bands are device specific and artificial
1279 * definitions (the "2.4 GHz band", the "5 GHz band" and the "60GHz band"),
1280 * however it is safe for now to assume that a frequency rule should not be
1281 * part of a frequency's band if the start freq or end freq are off by more
1282 * than 2 GHz for the 2.4 and 5 GHz bands, and by more than 20 GHz for the
1284 * This resolution can be lowered and should be considered as we add
1285 * regulatory rule support for other "bands".
1287 * Returns: whether or not the frequency is in the range
1289 static bool freq_in_rule_band(const struct ieee80211_freq_range *freq_range,
1292 #define ONE_GHZ_IN_KHZ 1000000
1294 * From 802.11ad: directional multi-gigabit (DMG):
1295 * Pertaining to operation in a frequency band containing a channel
1296 * with the Channel starting frequency above 45 GHz.
1298 u32 limit = freq_khz > 45 * ONE_GHZ_IN_KHZ ?
1299 20 * ONE_GHZ_IN_KHZ : 2 * ONE_GHZ_IN_KHZ;
1300 if (abs(freq_khz - freq_range->start_freq_khz) <= limit)
1302 if (abs(freq_khz - freq_range->end_freq_khz) <= limit)
1305 #undef ONE_GHZ_IN_KHZ
1309 * Later on we can perhaps use the more restrictive DFS
1310 * region but we don't have information for that yet so
1311 * for now simply disallow conflicts.
1313 static enum nl80211_dfs_regions
1314 reg_intersect_dfs_region(const enum nl80211_dfs_regions dfs_region1,
1315 const enum nl80211_dfs_regions dfs_region2)
1317 if (dfs_region1 != dfs_region2)
1318 return NL80211_DFS_UNSET;
1322 static void reg_wmm_rules_intersect(const struct ieee80211_wmm_ac *wmm_ac1,
1323 const struct ieee80211_wmm_ac *wmm_ac2,
1324 struct ieee80211_wmm_ac *intersect)
1326 intersect->cw_min = max_t(u16, wmm_ac1->cw_min, wmm_ac2->cw_min);
1327 intersect->cw_max = max_t(u16, wmm_ac1->cw_max, wmm_ac2->cw_max);
1328 intersect->cot = min_t(u16, wmm_ac1->cot, wmm_ac2->cot);
1329 intersect->aifsn = max_t(u8, wmm_ac1->aifsn, wmm_ac2->aifsn);
1333 * Helper for regdom_intersect(), this does the real
1334 * mathematical intersection fun
1336 static int reg_rules_intersect(const struct ieee80211_regdomain *rd1,
1337 const struct ieee80211_regdomain *rd2,
1338 const struct ieee80211_reg_rule *rule1,
1339 const struct ieee80211_reg_rule *rule2,
1340 struct ieee80211_reg_rule *intersected_rule)
1342 const struct ieee80211_freq_range *freq_range1, *freq_range2;
1343 struct ieee80211_freq_range *freq_range;
1344 const struct ieee80211_power_rule *power_rule1, *power_rule2;
1345 struct ieee80211_power_rule *power_rule;
1346 const struct ieee80211_wmm_rule *wmm_rule1, *wmm_rule2;
1347 struct ieee80211_wmm_rule *wmm_rule;
1348 u32 freq_diff, max_bandwidth1, max_bandwidth2;
1350 freq_range1 = &rule1->freq_range;
1351 freq_range2 = &rule2->freq_range;
1352 freq_range = &intersected_rule->freq_range;
1354 power_rule1 = &rule1->power_rule;
1355 power_rule2 = &rule2->power_rule;
1356 power_rule = &intersected_rule->power_rule;
1358 wmm_rule1 = &rule1->wmm_rule;
1359 wmm_rule2 = &rule2->wmm_rule;
1360 wmm_rule = &intersected_rule->wmm_rule;
1362 freq_range->start_freq_khz = max(freq_range1->start_freq_khz,
1363 freq_range2->start_freq_khz);
1364 freq_range->end_freq_khz = min(freq_range1->end_freq_khz,
1365 freq_range2->end_freq_khz);
1367 max_bandwidth1 = freq_range1->max_bandwidth_khz;
1368 max_bandwidth2 = freq_range2->max_bandwidth_khz;
1370 if (rule1->flags & NL80211_RRF_AUTO_BW)
1371 max_bandwidth1 = reg_get_max_bandwidth(rd1, rule1);
1372 if (rule2->flags & NL80211_RRF_AUTO_BW)
1373 max_bandwidth2 = reg_get_max_bandwidth(rd2, rule2);
1375 freq_range->max_bandwidth_khz = min(max_bandwidth1, max_bandwidth2);
1377 intersected_rule->flags = rule1->flags | rule2->flags;
1380 * In case NL80211_RRF_AUTO_BW requested for both rules
1381 * set AUTO_BW in intersected rule also. Next we will
1382 * calculate BW correctly in handle_channel function.
1383 * In other case remove AUTO_BW flag while we calculate
1384 * maximum bandwidth correctly and auto calculation is
1387 if ((rule1->flags & NL80211_RRF_AUTO_BW) &&
1388 (rule2->flags & NL80211_RRF_AUTO_BW))
1389 intersected_rule->flags |= NL80211_RRF_AUTO_BW;
1391 intersected_rule->flags &= ~NL80211_RRF_AUTO_BW;
1393 freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz;
1394 if (freq_range->max_bandwidth_khz > freq_diff)
1395 freq_range->max_bandwidth_khz = freq_diff;
1397 power_rule->max_eirp = min(power_rule1->max_eirp,
1398 power_rule2->max_eirp);
1399 power_rule->max_antenna_gain = min(power_rule1->max_antenna_gain,
1400 power_rule2->max_antenna_gain);
1402 intersected_rule->dfs_cac_ms = max(rule1->dfs_cac_ms,
1405 if (rule1->has_wmm && rule2->has_wmm) {
1408 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1409 reg_wmm_rules_intersect(&wmm_rule1->client[ac],
1410 &wmm_rule2->client[ac],
1411 &wmm_rule->client[ac]);
1412 reg_wmm_rules_intersect(&wmm_rule1->ap[ac],
1417 intersected_rule->has_wmm = true;
1418 } else if (rule1->has_wmm) {
1419 *wmm_rule = *wmm_rule1;
1420 intersected_rule->has_wmm = true;
1421 } else if (rule2->has_wmm) {
1422 *wmm_rule = *wmm_rule2;
1423 intersected_rule->has_wmm = true;
1425 intersected_rule->has_wmm = false;
1428 if (!is_valid_reg_rule(intersected_rule))
1434 /* check whether old rule contains new rule */
1435 static bool rule_contains(struct ieee80211_reg_rule *r1,
1436 struct ieee80211_reg_rule *r2)
1438 /* for simplicity, currently consider only same flags */
1439 if (r1->flags != r2->flags)
1442 /* verify r1 is more restrictive */
1443 if ((r1->power_rule.max_antenna_gain >
1444 r2->power_rule.max_antenna_gain) ||
1445 r1->power_rule.max_eirp > r2->power_rule.max_eirp)
1448 /* make sure r2's range is contained within r1 */
1449 if (r1->freq_range.start_freq_khz > r2->freq_range.start_freq_khz ||
1450 r1->freq_range.end_freq_khz < r2->freq_range.end_freq_khz)
1453 /* and finally verify that r1.max_bw >= r2.max_bw */
1454 if (r1->freq_range.max_bandwidth_khz <
1455 r2->freq_range.max_bandwidth_khz)
1461 /* add or extend current rules. do nothing if rule is already contained */
1462 static void add_rule(struct ieee80211_reg_rule *rule,
1463 struct ieee80211_reg_rule *reg_rules, u32 *n_rules)
1465 struct ieee80211_reg_rule *tmp_rule;
1468 for (i = 0; i < *n_rules; i++) {
1469 tmp_rule = ®_rules[i];
1470 /* rule is already contained - do nothing */
1471 if (rule_contains(tmp_rule, rule))
1474 /* extend rule if possible */
1475 if (rule_contains(rule, tmp_rule)) {
1476 memcpy(tmp_rule, rule, sizeof(*rule));
1481 memcpy(®_rules[*n_rules], rule, sizeof(*rule));
1486 * regdom_intersect - do the intersection between two regulatory domains
1487 * @rd1: first regulatory domain
1488 * @rd2: second regulatory domain
1490 * Use this function to get the intersection between two regulatory domains.
1491 * Once completed we will mark the alpha2 for the rd as intersected, "98",
1492 * as no one single alpha2 can represent this regulatory domain.
1494 * Returns a pointer to the regulatory domain structure which will hold the
1495 * resulting intersection of rules between rd1 and rd2. We will
1496 * kzalloc() this structure for you.
1498 * Returns: the intersected regdomain
1500 static struct ieee80211_regdomain *
1501 regdom_intersect(const struct ieee80211_regdomain *rd1,
1502 const struct ieee80211_regdomain *rd2)
1506 unsigned int num_rules = 0;
1507 const struct ieee80211_reg_rule *rule1, *rule2;
1508 struct ieee80211_reg_rule intersected_rule;
1509 struct ieee80211_regdomain *rd;
1515 * First we get a count of the rules we'll need, then we actually
1516 * build them. This is to so we can malloc() and free() a
1517 * regdomain once. The reason we use reg_rules_intersect() here
1518 * is it will return -EINVAL if the rule computed makes no sense.
1519 * All rules that do check out OK are valid.
1522 for (x = 0; x < rd1->n_reg_rules; x++) {
1523 rule1 = &rd1->reg_rules[x];
1524 for (y = 0; y < rd2->n_reg_rules; y++) {
1525 rule2 = &rd2->reg_rules[y];
1526 if (!reg_rules_intersect(rd1, rd2, rule1, rule2,
1535 rd = kzalloc(struct_size(rd, reg_rules, num_rules), GFP_KERNEL);
1539 for (x = 0; x < rd1->n_reg_rules; x++) {
1540 rule1 = &rd1->reg_rules[x];
1541 for (y = 0; y < rd2->n_reg_rules; y++) {
1542 rule2 = &rd2->reg_rules[y];
1543 r = reg_rules_intersect(rd1, rd2, rule1, rule2,
1546 * No need to memset here the intersected rule here as
1547 * we're not using the stack anymore
1552 add_rule(&intersected_rule, rd->reg_rules,
1557 rd->alpha2[0] = '9';
1558 rd->alpha2[1] = '8';
1559 rd->dfs_region = reg_intersect_dfs_region(rd1->dfs_region,
1566 * XXX: add support for the rest of enum nl80211_reg_rule_flags, we may
1567 * want to just have the channel structure use these
1569 static u32 map_regdom_flags(u32 rd_flags)
1571 u32 channel_flags = 0;
1572 if (rd_flags & NL80211_RRF_NO_IR_ALL)
1573 channel_flags |= IEEE80211_CHAN_NO_IR;
1574 if (rd_flags & NL80211_RRF_DFS)
1575 channel_flags |= IEEE80211_CHAN_RADAR;
1576 if (rd_flags & NL80211_RRF_NO_OFDM)
1577 channel_flags |= IEEE80211_CHAN_NO_OFDM;
1578 if (rd_flags & NL80211_RRF_NO_OUTDOOR)
1579 channel_flags |= IEEE80211_CHAN_INDOOR_ONLY;
1580 if (rd_flags & NL80211_RRF_IR_CONCURRENT)
1581 channel_flags |= IEEE80211_CHAN_IR_CONCURRENT;
1582 if (rd_flags & NL80211_RRF_NO_HT40MINUS)
1583 channel_flags |= IEEE80211_CHAN_NO_HT40MINUS;
1584 if (rd_flags & NL80211_RRF_NO_HT40PLUS)
1585 channel_flags |= IEEE80211_CHAN_NO_HT40PLUS;
1586 if (rd_flags & NL80211_RRF_NO_80MHZ)
1587 channel_flags |= IEEE80211_CHAN_NO_80MHZ;
1588 if (rd_flags & NL80211_RRF_NO_160MHZ)
1589 channel_flags |= IEEE80211_CHAN_NO_160MHZ;
1590 if (rd_flags & NL80211_RRF_NO_HE)
1591 channel_flags |= IEEE80211_CHAN_NO_HE;
1592 if (rd_flags & NL80211_RRF_NO_320MHZ)
1593 channel_flags |= IEEE80211_CHAN_NO_320MHZ;
1594 if (rd_flags & NL80211_RRF_NO_EHT)
1595 channel_flags |= IEEE80211_CHAN_NO_EHT;
1596 if (rd_flags & NL80211_RRF_DFS_CONCURRENT)
1597 channel_flags |= IEEE80211_CHAN_DFS_CONCURRENT;
1598 if (rd_flags & NL80211_RRF_NO_UHB_VLP_CLIENT)
1599 channel_flags |= IEEE80211_CHAN_NO_UHB_VLP_CLIENT;
1600 if (rd_flags & NL80211_RRF_NO_UHB_AFC_CLIENT)
1601 channel_flags |= IEEE80211_CHAN_NO_UHB_AFC_CLIENT;
1602 if (rd_flags & NL80211_RRF_PSD)
1603 channel_flags |= IEEE80211_CHAN_PSD;
1604 return channel_flags;
1607 static const struct ieee80211_reg_rule *
1608 freq_reg_info_regd(u32 center_freq,
1609 const struct ieee80211_regdomain *regd, u32 bw)
1612 bool band_rule_found = false;
1613 bool bw_fits = false;
1616 return ERR_PTR(-EINVAL);
1618 for (i = 0; i < regd->n_reg_rules; i++) {
1619 const struct ieee80211_reg_rule *rr;
1620 const struct ieee80211_freq_range *fr = NULL;
1622 rr = ®d->reg_rules[i];
1623 fr = &rr->freq_range;
1626 * We only need to know if one frequency rule was
1627 * in center_freq's band, that's enough, so let's
1628 * not overwrite it once found
1630 if (!band_rule_found)
1631 band_rule_found = freq_in_rule_band(fr, center_freq);
1633 bw_fits = cfg80211_does_bw_fit_range(fr, center_freq, bw);
1635 if (band_rule_found && bw_fits)
1639 if (!band_rule_found)
1640 return ERR_PTR(-ERANGE);
1642 return ERR_PTR(-EINVAL);
1645 static const struct ieee80211_reg_rule *
1646 __freq_reg_info(struct wiphy *wiphy, u32 center_freq, u32 min_bw)
1648 const struct ieee80211_regdomain *regd = reg_get_regdomain(wiphy);
1649 static const u32 bws[] = {0, 1, 2, 4, 5, 8, 10, 16, 20};
1650 const struct ieee80211_reg_rule *reg_rule = ERR_PTR(-ERANGE);
1651 int i = ARRAY_SIZE(bws) - 1;
1654 for (bw = MHZ_TO_KHZ(bws[i]); bw >= min_bw; bw = MHZ_TO_KHZ(bws[i--])) {
1655 reg_rule = freq_reg_info_regd(center_freq, regd, bw);
1656 if (!IS_ERR(reg_rule))
1663 const struct ieee80211_reg_rule *freq_reg_info(struct wiphy *wiphy,
1666 u32 min_bw = center_freq < MHZ_TO_KHZ(1000) ? 1 : 20;
1668 return __freq_reg_info(wiphy, center_freq, MHZ_TO_KHZ(min_bw));
1670 EXPORT_SYMBOL(freq_reg_info);
1672 const char *reg_initiator_name(enum nl80211_reg_initiator initiator)
1674 switch (initiator) {
1675 case NL80211_REGDOM_SET_BY_CORE:
1677 case NL80211_REGDOM_SET_BY_USER:
1679 case NL80211_REGDOM_SET_BY_DRIVER:
1681 case NL80211_REGDOM_SET_BY_COUNTRY_IE:
1682 return "country element";
1688 EXPORT_SYMBOL(reg_initiator_name);
1690 static uint32_t reg_rule_to_chan_bw_flags(const struct ieee80211_regdomain *regd,
1691 const struct ieee80211_reg_rule *reg_rule,
1692 const struct ieee80211_channel *chan)
1694 const struct ieee80211_freq_range *freq_range = NULL;
1695 u32 max_bandwidth_khz, center_freq_khz, bw_flags = 0;
1696 bool is_s1g = chan->band == NL80211_BAND_S1GHZ;
1698 freq_range = ®_rule->freq_range;
1700 max_bandwidth_khz = freq_range->max_bandwidth_khz;
1701 center_freq_khz = ieee80211_channel_to_khz(chan);
1702 /* Check if auto calculation requested */
1703 if (reg_rule->flags & NL80211_RRF_AUTO_BW)
1704 max_bandwidth_khz = reg_get_max_bandwidth(regd, reg_rule);
1706 /* If we get a reg_rule we can assume that at least 5Mhz fit */
1707 if (!cfg80211_does_bw_fit_range(freq_range,
1710 bw_flags |= IEEE80211_CHAN_NO_10MHZ;
1711 if (!cfg80211_does_bw_fit_range(freq_range,
1714 bw_flags |= IEEE80211_CHAN_NO_20MHZ;
1717 /* S1G is strict about non overlapping channels. We can
1718 * calculate which bandwidth is allowed per channel by finding
1719 * the largest bandwidth which cleanly divides the freq_range.
1722 int ch_bw = max_bandwidth_khz;
1725 edge_offset = (center_freq_khz - ch_bw / 2) -
1726 freq_range->start_freq_khz;
1727 if (edge_offset % ch_bw == 0) {
1728 switch (KHZ_TO_MHZ(ch_bw)) {
1730 bw_flags |= IEEE80211_CHAN_1MHZ;
1733 bw_flags |= IEEE80211_CHAN_2MHZ;
1736 bw_flags |= IEEE80211_CHAN_4MHZ;
1739 bw_flags |= IEEE80211_CHAN_8MHZ;
1742 bw_flags |= IEEE80211_CHAN_16MHZ;
1745 /* If we got here, no bandwidths fit on
1746 * this frequency, ie. band edge.
1748 bw_flags |= IEEE80211_CHAN_DISABLED;
1756 if (max_bandwidth_khz < MHZ_TO_KHZ(10))
1757 bw_flags |= IEEE80211_CHAN_NO_10MHZ;
1758 if (max_bandwidth_khz < MHZ_TO_KHZ(20))
1759 bw_flags |= IEEE80211_CHAN_NO_20MHZ;
1760 if (max_bandwidth_khz < MHZ_TO_KHZ(40))
1761 bw_flags |= IEEE80211_CHAN_NO_HT40;
1762 if (max_bandwidth_khz < MHZ_TO_KHZ(80))
1763 bw_flags |= IEEE80211_CHAN_NO_80MHZ;
1764 if (max_bandwidth_khz < MHZ_TO_KHZ(160))
1765 bw_flags |= IEEE80211_CHAN_NO_160MHZ;
1766 if (max_bandwidth_khz < MHZ_TO_KHZ(320))
1767 bw_flags |= IEEE80211_CHAN_NO_320MHZ;
1772 static void handle_channel_single_rule(struct wiphy *wiphy,
1773 enum nl80211_reg_initiator initiator,
1774 struct ieee80211_channel *chan,
1776 struct regulatory_request *lr,
1777 struct wiphy *request_wiphy,
1778 const struct ieee80211_reg_rule *reg_rule)
1781 const struct ieee80211_power_rule *power_rule = NULL;
1782 const struct ieee80211_regdomain *regd;
1784 regd = reg_get_regdomain(wiphy);
1786 power_rule = ®_rule->power_rule;
1787 bw_flags = reg_rule_to_chan_bw_flags(regd, reg_rule, chan);
1789 if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER &&
1790 request_wiphy && request_wiphy == wiphy &&
1791 request_wiphy->regulatory_flags & REGULATORY_STRICT_REG) {
1793 * This guarantees the driver's requested regulatory domain
1794 * will always be used as a base for further regulatory
1797 chan->flags = chan->orig_flags =
1798 map_regdom_flags(reg_rule->flags) | bw_flags;
1799 chan->max_antenna_gain = chan->orig_mag =
1800 (int) MBI_TO_DBI(power_rule->max_antenna_gain);
1801 chan->max_reg_power = chan->max_power = chan->orig_mpwr =
1802 (int) MBM_TO_DBM(power_rule->max_eirp);
1804 if (chan->flags & IEEE80211_CHAN_RADAR) {
1805 chan->dfs_cac_ms = IEEE80211_DFS_MIN_CAC_TIME_MS;
1806 if (reg_rule->dfs_cac_ms)
1807 chan->dfs_cac_ms = reg_rule->dfs_cac_ms;
1810 if (chan->flags & IEEE80211_CHAN_PSD)
1811 chan->psd = reg_rule->psd;
1816 chan->dfs_state = NL80211_DFS_USABLE;
1817 chan->dfs_state_entered = jiffies;
1819 chan->beacon_found = false;
1820 chan->flags = flags | bw_flags | map_regdom_flags(reg_rule->flags);
1821 chan->max_antenna_gain =
1822 min_t(int, chan->orig_mag,
1823 MBI_TO_DBI(power_rule->max_antenna_gain));
1824 chan->max_reg_power = (int) MBM_TO_DBM(power_rule->max_eirp);
1826 if (chan->flags & IEEE80211_CHAN_RADAR) {
1827 if (reg_rule->dfs_cac_ms)
1828 chan->dfs_cac_ms = reg_rule->dfs_cac_ms;
1830 chan->dfs_cac_ms = IEEE80211_DFS_MIN_CAC_TIME_MS;
1833 if (chan->flags & IEEE80211_CHAN_PSD)
1834 chan->psd = reg_rule->psd;
1836 if (chan->orig_mpwr) {
1838 * Devices that use REGULATORY_COUNTRY_IE_FOLLOW_POWER
1839 * will always follow the passed country IE power settings.
1841 if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE &&
1842 wiphy->regulatory_flags & REGULATORY_COUNTRY_IE_FOLLOW_POWER)
1843 chan->max_power = chan->max_reg_power;
1845 chan->max_power = min(chan->orig_mpwr,
1846 chan->max_reg_power);
1848 chan->max_power = chan->max_reg_power;
1851 static void handle_channel_adjacent_rules(struct wiphy *wiphy,
1852 enum nl80211_reg_initiator initiator,
1853 struct ieee80211_channel *chan,
1855 struct regulatory_request *lr,
1856 struct wiphy *request_wiphy,
1857 const struct ieee80211_reg_rule *rrule1,
1858 const struct ieee80211_reg_rule *rrule2,
1859 struct ieee80211_freq_range *comb_range)
1863 const struct ieee80211_power_rule *power_rule1 = NULL;
1864 const struct ieee80211_power_rule *power_rule2 = NULL;
1865 const struct ieee80211_regdomain *regd;
1867 regd = reg_get_regdomain(wiphy);
1869 power_rule1 = &rrule1->power_rule;
1870 power_rule2 = &rrule2->power_rule;
1871 bw_flags1 = reg_rule_to_chan_bw_flags(regd, rrule1, chan);
1872 bw_flags2 = reg_rule_to_chan_bw_flags(regd, rrule2, chan);
1874 if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER &&
1875 request_wiphy && request_wiphy == wiphy &&
1876 request_wiphy->regulatory_flags & REGULATORY_STRICT_REG) {
1877 /* This guarantees the driver's requested regulatory domain
1878 * will always be used as a base for further regulatory
1882 map_regdom_flags(rrule1->flags) |
1883 map_regdom_flags(rrule2->flags) |
1886 chan->orig_flags = chan->flags;
1887 chan->max_antenna_gain =
1888 min_t(int, MBI_TO_DBI(power_rule1->max_antenna_gain),
1889 MBI_TO_DBI(power_rule2->max_antenna_gain));
1890 chan->orig_mag = chan->max_antenna_gain;
1891 chan->max_reg_power =
1892 min_t(int, MBM_TO_DBM(power_rule1->max_eirp),
1893 MBM_TO_DBM(power_rule2->max_eirp));
1894 chan->max_power = chan->max_reg_power;
1895 chan->orig_mpwr = chan->max_reg_power;
1897 if (chan->flags & IEEE80211_CHAN_RADAR) {
1898 chan->dfs_cac_ms = IEEE80211_DFS_MIN_CAC_TIME_MS;
1899 if (rrule1->dfs_cac_ms || rrule2->dfs_cac_ms)
1900 chan->dfs_cac_ms = max_t(unsigned int,
1902 rrule2->dfs_cac_ms);
1905 if ((rrule1->flags & NL80211_RRF_PSD) &&
1906 (rrule2->flags & NL80211_RRF_PSD))
1907 chan->psd = min_t(s8, rrule1->psd, rrule2->psd);
1909 chan->flags &= ~NL80211_RRF_PSD;
1914 chan->dfs_state = NL80211_DFS_USABLE;
1915 chan->dfs_state_entered = jiffies;
1917 chan->beacon_found = false;
1918 chan->flags = flags | bw_flags1 | bw_flags2 |
1919 map_regdom_flags(rrule1->flags) |
1920 map_regdom_flags(rrule2->flags);
1922 /* reg_rule_to_chan_bw_flags may forbids 10 and forbids 20 MHz
1923 * (otherwise no adj. rule case), recheck therefore
1925 if (cfg80211_does_bw_fit_range(comb_range,
1926 ieee80211_channel_to_khz(chan),
1928 chan->flags &= ~IEEE80211_CHAN_NO_10MHZ;
1929 if (cfg80211_does_bw_fit_range(comb_range,
1930 ieee80211_channel_to_khz(chan),
1932 chan->flags &= ~IEEE80211_CHAN_NO_20MHZ;
1934 chan->max_antenna_gain =
1935 min_t(int, chan->orig_mag,
1937 MBI_TO_DBI(power_rule1->max_antenna_gain),
1938 MBI_TO_DBI(power_rule2->max_antenna_gain)));
1939 chan->max_reg_power = min_t(int,
1940 MBM_TO_DBM(power_rule1->max_eirp),
1941 MBM_TO_DBM(power_rule2->max_eirp));
1943 if (chan->flags & IEEE80211_CHAN_RADAR) {
1944 if (rrule1->dfs_cac_ms || rrule2->dfs_cac_ms)
1945 chan->dfs_cac_ms = max_t(unsigned int,
1947 rrule2->dfs_cac_ms);
1949 chan->dfs_cac_ms = IEEE80211_DFS_MIN_CAC_TIME_MS;
1952 if (chan->orig_mpwr) {
1953 /* Devices that use REGULATORY_COUNTRY_IE_FOLLOW_POWER
1954 * will always follow the passed country IE power settings.
1956 if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE &&
1957 wiphy->regulatory_flags & REGULATORY_COUNTRY_IE_FOLLOW_POWER)
1958 chan->max_power = chan->max_reg_power;
1960 chan->max_power = min(chan->orig_mpwr,
1961 chan->max_reg_power);
1963 chan->max_power = chan->max_reg_power;
1967 /* Note that right now we assume the desired channel bandwidth
1968 * is always 20 MHz for each individual channel (HT40 uses 20 MHz
1969 * per channel, the primary and the extension channel).
1971 static void handle_channel(struct wiphy *wiphy,
1972 enum nl80211_reg_initiator initiator,
1973 struct ieee80211_channel *chan)
1975 const u32 orig_chan_freq = ieee80211_channel_to_khz(chan);
1976 struct regulatory_request *lr = get_last_request();
1977 struct wiphy *request_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx);
1978 const struct ieee80211_reg_rule *rrule = NULL;
1979 const struct ieee80211_reg_rule *rrule1 = NULL;
1980 const struct ieee80211_reg_rule *rrule2 = NULL;
1982 u32 flags = chan->orig_flags;
1984 rrule = freq_reg_info(wiphy, orig_chan_freq);
1985 if (IS_ERR(rrule)) {
1986 /* check for adjacent match, therefore get rules for
1987 * chan - 20 MHz and chan + 20 MHz and test
1988 * if reg rules are adjacent
1990 rrule1 = freq_reg_info(wiphy,
1991 orig_chan_freq - MHZ_TO_KHZ(20));
1992 rrule2 = freq_reg_info(wiphy,
1993 orig_chan_freq + MHZ_TO_KHZ(20));
1994 if (!IS_ERR(rrule1) && !IS_ERR(rrule2)) {
1995 struct ieee80211_freq_range comb_range;
1997 if (rrule1->freq_range.end_freq_khz !=
1998 rrule2->freq_range.start_freq_khz)
2001 comb_range.start_freq_khz =
2002 rrule1->freq_range.start_freq_khz;
2003 comb_range.end_freq_khz =
2004 rrule2->freq_range.end_freq_khz;
2005 comb_range.max_bandwidth_khz =
2007 rrule1->freq_range.max_bandwidth_khz,
2008 rrule2->freq_range.max_bandwidth_khz);
2010 if (!cfg80211_does_bw_fit_range(&comb_range,
2015 handle_channel_adjacent_rules(wiphy, initiator, chan,
2016 flags, lr, request_wiphy,
2023 /* We will disable all channels that do not match our
2024 * received regulatory rule unless the hint is coming
2025 * from a Country IE and the Country IE had no information
2026 * about a band. The IEEE 802.11 spec allows for an AP
2027 * to send only a subset of the regulatory rules allowed,
2028 * so an AP in the US that only supports 2.4 GHz may only send
2029 * a country IE with information for the 2.4 GHz band
2030 * while 5 GHz is still supported.
2032 if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE &&
2033 PTR_ERR(rrule) == -ERANGE)
2036 if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER &&
2037 request_wiphy && request_wiphy == wiphy &&
2038 request_wiphy->regulatory_flags & REGULATORY_STRICT_REG) {
2039 pr_debug("Disabling freq %d.%03d MHz for good\n",
2040 chan->center_freq, chan->freq_offset);
2041 chan->orig_flags |= IEEE80211_CHAN_DISABLED;
2042 chan->flags = chan->orig_flags;
2044 pr_debug("Disabling freq %d.%03d MHz\n",
2045 chan->center_freq, chan->freq_offset);
2046 chan->flags |= IEEE80211_CHAN_DISABLED;
2051 handle_channel_single_rule(wiphy, initiator, chan, flags, lr,
2052 request_wiphy, rrule);
2055 static void handle_band(struct wiphy *wiphy,
2056 enum nl80211_reg_initiator initiator,
2057 struct ieee80211_supported_band *sband)
2064 for (i = 0; i < sband->n_channels; i++)
2065 handle_channel(wiphy, initiator, &sband->channels[i]);
2068 static bool reg_request_cell_base(struct regulatory_request *request)
2070 if (request->initiator != NL80211_REGDOM_SET_BY_USER)
2072 return request->user_reg_hint_type == NL80211_USER_REG_HINT_CELL_BASE;
2075 bool reg_last_request_cell_base(void)
2077 return reg_request_cell_base(get_last_request());
2080 #ifdef CONFIG_CFG80211_REG_CELLULAR_HINTS
2081 /* Core specific check */
2082 static enum reg_request_treatment
2083 reg_ignore_cell_hint(struct regulatory_request *pending_request)
2085 struct regulatory_request *lr = get_last_request();
2087 if (!reg_num_devs_support_basehint)
2088 return REG_REQ_IGNORE;
2090 if (reg_request_cell_base(lr) &&
2091 !regdom_changes(pending_request->alpha2))
2092 return REG_REQ_ALREADY_SET;
2097 /* Device specific check */
2098 static bool reg_dev_ignore_cell_hint(struct wiphy *wiphy)
2100 return !(wiphy->features & NL80211_FEATURE_CELL_BASE_REG_HINTS);
2103 static enum reg_request_treatment
2104 reg_ignore_cell_hint(struct regulatory_request *pending_request)
2106 return REG_REQ_IGNORE;
2109 static bool reg_dev_ignore_cell_hint(struct wiphy *wiphy)
2115 static bool wiphy_strict_alpha2_regd(struct wiphy *wiphy)
2117 if (wiphy->regulatory_flags & REGULATORY_STRICT_REG &&
2118 !(wiphy->regulatory_flags & REGULATORY_CUSTOM_REG))
2123 static bool ignore_reg_update(struct wiphy *wiphy,
2124 enum nl80211_reg_initiator initiator)
2126 struct regulatory_request *lr = get_last_request();
2128 if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED)
2132 pr_debug("Ignoring regulatory request set by %s since last_request is not set\n",
2133 reg_initiator_name(initiator));
2137 if (initiator == NL80211_REGDOM_SET_BY_CORE &&
2138 wiphy->regulatory_flags & REGULATORY_CUSTOM_REG) {
2139 pr_debug("Ignoring regulatory request set by %s since the driver uses its own custom regulatory domain\n",
2140 reg_initiator_name(initiator));
2145 * wiphy->regd will be set once the device has its own
2146 * desired regulatory domain set
2148 if (wiphy_strict_alpha2_regd(wiphy) && !wiphy->regd &&
2149 initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE &&
2150 !is_world_regdom(lr->alpha2)) {
2151 pr_debug("Ignoring regulatory request set by %s since the driver requires its own regulatory domain to be set first\n",
2152 reg_initiator_name(initiator));
2156 if (reg_request_cell_base(lr))
2157 return reg_dev_ignore_cell_hint(wiphy);
2162 static bool reg_is_world_roaming(struct wiphy *wiphy)
2164 const struct ieee80211_regdomain *cr = get_cfg80211_regdom();
2165 const struct ieee80211_regdomain *wr = get_wiphy_regdom(wiphy);
2166 struct regulatory_request *lr = get_last_request();
2168 if (is_world_regdom(cr->alpha2) || (wr && is_world_regdom(wr->alpha2)))
2171 if (lr && lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE &&
2172 wiphy->regulatory_flags & REGULATORY_CUSTOM_REG)
2178 static void reg_call_notifier(struct wiphy *wiphy,
2179 struct regulatory_request *request)
2181 if (wiphy->reg_notifier)
2182 wiphy->reg_notifier(wiphy, request);
2185 static void handle_reg_beacon(struct wiphy *wiphy, unsigned int chan_idx,
2186 struct reg_beacon *reg_beacon)
2188 struct ieee80211_supported_band *sband;
2189 struct ieee80211_channel *chan;
2190 bool channel_changed = false;
2191 struct ieee80211_channel chan_before;
2192 struct regulatory_request *lr = get_last_request();
2194 sband = wiphy->bands[reg_beacon->chan.band];
2195 chan = &sband->channels[chan_idx];
2197 if (likely(!ieee80211_channel_equal(chan, ®_beacon->chan)))
2200 if (chan->beacon_found)
2203 chan->beacon_found = true;
2205 if (!reg_is_world_roaming(wiphy))
2208 if (wiphy->regulatory_flags & REGULATORY_DISABLE_BEACON_HINTS)
2211 chan_before = *chan;
2213 if (chan->flags & IEEE80211_CHAN_NO_IR) {
2214 chan->flags &= ~IEEE80211_CHAN_NO_IR;
2215 channel_changed = true;
2218 if (channel_changed) {
2219 nl80211_send_beacon_hint_event(wiphy, &chan_before, chan);
2220 if (wiphy->flags & WIPHY_FLAG_CHANNEL_CHANGE_ON_BEACON)
2221 reg_call_notifier(wiphy, lr);
2226 * Called when a scan on a wiphy finds a beacon on
2229 static void wiphy_update_new_beacon(struct wiphy *wiphy,
2230 struct reg_beacon *reg_beacon)
2233 struct ieee80211_supported_band *sband;
2235 if (!wiphy->bands[reg_beacon->chan.band])
2238 sband = wiphy->bands[reg_beacon->chan.band];
2240 for (i = 0; i < sband->n_channels; i++)
2241 handle_reg_beacon(wiphy, i, reg_beacon);
2245 * Called upon reg changes or a new wiphy is added
2247 static void wiphy_update_beacon_reg(struct wiphy *wiphy)
2250 struct ieee80211_supported_band *sband;
2251 struct reg_beacon *reg_beacon;
2253 list_for_each_entry(reg_beacon, ®_beacon_list, list) {
2254 if (!wiphy->bands[reg_beacon->chan.band])
2256 sband = wiphy->bands[reg_beacon->chan.band];
2257 for (i = 0; i < sband->n_channels; i++)
2258 handle_reg_beacon(wiphy, i, reg_beacon);
2262 /* Reap the advantages of previously found beacons */
2263 static void reg_process_beacons(struct wiphy *wiphy)
2266 * Means we are just firing up cfg80211, so no beacons would
2267 * have been processed yet.
2271 wiphy_update_beacon_reg(wiphy);
2274 static bool is_ht40_allowed(struct ieee80211_channel *chan)
2278 if (chan->flags & IEEE80211_CHAN_DISABLED)
2280 /* This would happen when regulatory rules disallow HT40 completely */
2281 if ((chan->flags & IEEE80211_CHAN_NO_HT40) == IEEE80211_CHAN_NO_HT40)
2286 static void reg_process_ht_flags_channel(struct wiphy *wiphy,
2287 struct ieee80211_channel *channel)
2289 struct ieee80211_supported_band *sband = wiphy->bands[channel->band];
2290 struct ieee80211_channel *channel_before = NULL, *channel_after = NULL;
2291 const struct ieee80211_regdomain *regd;
2295 if (!is_ht40_allowed(channel)) {
2296 channel->flags |= IEEE80211_CHAN_NO_HT40;
2301 * We need to ensure the extension channels exist to
2302 * be able to use HT40- or HT40+, this finds them (or not)
2304 for (i = 0; i < sband->n_channels; i++) {
2305 struct ieee80211_channel *c = &sband->channels[i];
2307 if (c->center_freq == (channel->center_freq - 20))
2309 if (c->center_freq == (channel->center_freq + 20))
2314 regd = get_wiphy_regdom(wiphy);
2316 const struct ieee80211_reg_rule *reg_rule =
2317 freq_reg_info_regd(MHZ_TO_KHZ(channel->center_freq),
2318 regd, MHZ_TO_KHZ(20));
2320 if (!IS_ERR(reg_rule))
2321 flags = reg_rule->flags;
2325 * Please note that this assumes target bandwidth is 20 MHz,
2326 * if that ever changes we also need to change the below logic
2327 * to include that as well.
2329 if (!is_ht40_allowed(channel_before) ||
2330 flags & NL80211_RRF_NO_HT40MINUS)
2331 channel->flags |= IEEE80211_CHAN_NO_HT40MINUS;
2333 channel->flags &= ~IEEE80211_CHAN_NO_HT40MINUS;
2335 if (!is_ht40_allowed(channel_after) ||
2336 flags & NL80211_RRF_NO_HT40PLUS)
2337 channel->flags |= IEEE80211_CHAN_NO_HT40PLUS;
2339 channel->flags &= ~IEEE80211_CHAN_NO_HT40PLUS;
2342 static void reg_process_ht_flags_band(struct wiphy *wiphy,
2343 struct ieee80211_supported_band *sband)
2350 for (i = 0; i < sband->n_channels; i++)
2351 reg_process_ht_flags_channel(wiphy, &sband->channels[i]);
2354 static void reg_process_ht_flags(struct wiphy *wiphy)
2356 enum nl80211_band band;
2361 for (band = 0; band < NUM_NL80211_BANDS; band++)
2362 reg_process_ht_flags_band(wiphy, wiphy->bands[band]);
2365 static bool reg_wdev_chan_valid(struct wiphy *wiphy, struct wireless_dev *wdev)
2367 struct cfg80211_chan_def chandef = {};
2368 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
2369 enum nl80211_iftype iftype;
2373 iftype = wdev->iftype;
2375 /* make sure the interface is active */
2376 if (!wdev->netdev || !netif_running(wdev->netdev))
2379 for (link = 0; link < ARRAY_SIZE(wdev->links); link++) {
2380 struct ieee80211_channel *chan;
2382 if (!wdev->valid_links && link > 0)
2384 if (wdev->valid_links && !(wdev->valid_links & BIT(link)))
2387 case NL80211_IFTYPE_AP:
2388 case NL80211_IFTYPE_P2P_GO:
2389 if (!wdev->links[link].ap.beacon_interval)
2391 chandef = wdev->links[link].ap.chandef;
2393 case NL80211_IFTYPE_MESH_POINT:
2394 if (!wdev->u.mesh.beacon_interval)
2396 chandef = wdev->u.mesh.chandef;
2398 case NL80211_IFTYPE_ADHOC:
2399 if (!wdev->u.ibss.ssid_len)
2401 chandef = wdev->u.ibss.chandef;
2403 case NL80211_IFTYPE_STATION:
2404 case NL80211_IFTYPE_P2P_CLIENT:
2405 /* Maybe we could consider disabling that link only? */
2406 if (!wdev->links[link].client.current_bss)
2409 chan = wdev->links[link].client.current_bss->pub.channel;
2413 if (!rdev->ops->get_channel ||
2414 rdev_get_channel(rdev, wdev, link, &chandef))
2415 cfg80211_chandef_create(&chandef, chan,
2416 NL80211_CHAN_NO_HT);
2418 case NL80211_IFTYPE_MONITOR:
2419 case NL80211_IFTYPE_AP_VLAN:
2420 case NL80211_IFTYPE_P2P_DEVICE:
2421 /* no enforcement required */
2423 case NL80211_IFTYPE_OCB:
2424 if (!wdev->u.ocb.chandef.chan)
2426 chandef = wdev->u.ocb.chandef;
2428 case NL80211_IFTYPE_NAN:
2429 /* we have no info, but NAN is also pretty universal */
2432 /* others not implemented for now */
2438 case NL80211_IFTYPE_AP:
2439 case NL80211_IFTYPE_P2P_GO:
2440 case NL80211_IFTYPE_ADHOC:
2441 case NL80211_IFTYPE_MESH_POINT:
2442 ret = cfg80211_reg_can_beacon_relax(wiphy, &chandef,
2447 case NL80211_IFTYPE_STATION:
2448 case NL80211_IFTYPE_P2P_CLIENT:
2449 ret = cfg80211_chandef_usable(wiphy, &chandef,
2450 IEEE80211_CHAN_DISABLED);
2462 static void reg_leave_invalid_chans(struct wiphy *wiphy)
2464 struct wireless_dev *wdev;
2465 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
2468 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list)
2469 if (!reg_wdev_chan_valid(wiphy, wdev))
2470 cfg80211_leave(rdev, wdev);
2471 wiphy_unlock(wiphy);
2474 static void reg_check_chans_work(struct work_struct *work)
2476 struct cfg80211_registered_device *rdev;
2478 pr_debug("Verifying active interfaces after reg change\n");
2482 reg_leave_invalid_chans(&rdev->wiphy);
2487 void reg_check_channels(void)
2490 * Give usermode a chance to do something nicer (move to another
2491 * channel, orderly disconnection), before forcing a disconnection.
2493 mod_delayed_work(system_power_efficient_wq,
2495 msecs_to_jiffies(REG_ENFORCE_GRACE_MS));
2498 static void wiphy_update_regulatory(struct wiphy *wiphy,
2499 enum nl80211_reg_initiator initiator)
2501 enum nl80211_band band;
2502 struct regulatory_request *lr = get_last_request();
2504 if (ignore_reg_update(wiphy, initiator)) {
2506 * Regulatory updates set by CORE are ignored for custom
2507 * regulatory cards. Let us notify the changes to the driver,
2508 * as some drivers used this to restore its orig_* reg domain.
2510 if (initiator == NL80211_REGDOM_SET_BY_CORE &&
2511 wiphy->regulatory_flags & REGULATORY_CUSTOM_REG &&
2512 !(wiphy->regulatory_flags &
2513 REGULATORY_WIPHY_SELF_MANAGED))
2514 reg_call_notifier(wiphy, lr);
2518 lr->dfs_region = get_cfg80211_regdom()->dfs_region;
2520 for (band = 0; band < NUM_NL80211_BANDS; band++)
2521 handle_band(wiphy, initiator, wiphy->bands[band]);
2523 reg_process_beacons(wiphy);
2524 reg_process_ht_flags(wiphy);
2525 reg_call_notifier(wiphy, lr);
2528 static void update_all_wiphy_regulatory(enum nl80211_reg_initiator initiator)
2530 struct cfg80211_registered_device *rdev;
2531 struct wiphy *wiphy;
2535 for_each_rdev(rdev) {
2536 wiphy = &rdev->wiphy;
2537 wiphy_update_regulatory(wiphy, initiator);
2540 reg_check_channels();
2543 static void handle_channel_custom(struct wiphy *wiphy,
2544 struct ieee80211_channel *chan,
2545 const struct ieee80211_regdomain *regd,
2549 const struct ieee80211_reg_rule *reg_rule = NULL;
2550 const struct ieee80211_power_rule *power_rule = NULL;
2551 u32 bw, center_freq_khz;
2553 center_freq_khz = ieee80211_channel_to_khz(chan);
2554 for (bw = MHZ_TO_KHZ(20); bw >= min_bw; bw = bw / 2) {
2555 reg_rule = freq_reg_info_regd(center_freq_khz, regd, bw);
2556 if (!IS_ERR(reg_rule))
2560 if (IS_ERR_OR_NULL(reg_rule)) {
2561 pr_debug("Disabling freq %d.%03d MHz as custom regd has no rule that fits it\n",
2562 chan->center_freq, chan->freq_offset);
2563 if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) {
2564 chan->flags |= IEEE80211_CHAN_DISABLED;
2566 chan->orig_flags |= IEEE80211_CHAN_DISABLED;
2567 chan->flags = chan->orig_flags;
2572 power_rule = ®_rule->power_rule;
2573 bw_flags = reg_rule_to_chan_bw_flags(regd, reg_rule, chan);
2575 chan->dfs_state_entered = jiffies;
2576 chan->dfs_state = NL80211_DFS_USABLE;
2578 chan->beacon_found = false;
2580 if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED)
2581 chan->flags = chan->orig_flags | bw_flags |
2582 map_regdom_flags(reg_rule->flags);
2584 chan->flags |= map_regdom_flags(reg_rule->flags) | bw_flags;
2586 chan->max_antenna_gain = (int) MBI_TO_DBI(power_rule->max_antenna_gain);
2587 chan->max_reg_power = chan->max_power =
2588 (int) MBM_TO_DBM(power_rule->max_eirp);
2590 if (chan->flags & IEEE80211_CHAN_RADAR) {
2591 if (reg_rule->dfs_cac_ms)
2592 chan->dfs_cac_ms = reg_rule->dfs_cac_ms;
2594 chan->dfs_cac_ms = IEEE80211_DFS_MIN_CAC_TIME_MS;
2597 if (chan->flags & IEEE80211_CHAN_PSD)
2598 chan->psd = reg_rule->psd;
2600 chan->max_power = chan->max_reg_power;
2603 static void handle_band_custom(struct wiphy *wiphy,
2604 struct ieee80211_supported_band *sband,
2605 const struct ieee80211_regdomain *regd)
2613 * We currently assume that you always want at least 20 MHz,
2614 * otherwise channel 12 might get enabled if this rule is
2615 * compatible to US, which permits 2402 - 2472 MHz.
2617 for (i = 0; i < sband->n_channels; i++)
2618 handle_channel_custom(wiphy, &sband->channels[i], regd,
2622 /* Used by drivers prior to wiphy registration */
2623 void wiphy_apply_custom_regulatory(struct wiphy *wiphy,
2624 const struct ieee80211_regdomain *regd)
2626 const struct ieee80211_regdomain *new_regd, *tmp;
2627 enum nl80211_band band;
2628 unsigned int bands_set = 0;
2630 WARN(!(wiphy->regulatory_flags & REGULATORY_CUSTOM_REG),
2631 "wiphy should have REGULATORY_CUSTOM_REG\n");
2632 wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG;
2634 for (band = 0; band < NUM_NL80211_BANDS; band++) {
2635 if (!wiphy->bands[band])
2637 handle_band_custom(wiphy, wiphy->bands[band], regd);
2642 * no point in calling this if it won't have any effect
2643 * on your device's supported bands.
2645 WARN_ON(!bands_set);
2646 new_regd = reg_copy_regd(regd);
2647 if (IS_ERR(new_regd))
2653 tmp = get_wiphy_regdom(wiphy);
2654 rcu_assign_pointer(wiphy->regd, new_regd);
2655 rcu_free_regdom(tmp);
2657 wiphy_unlock(wiphy);
2660 EXPORT_SYMBOL(wiphy_apply_custom_regulatory);
2662 static void reg_set_request_processed(void)
2664 bool need_more_processing = false;
2665 struct regulatory_request *lr = get_last_request();
2667 lr->processed = true;
2669 spin_lock(®_requests_lock);
2670 if (!list_empty(®_requests_list))
2671 need_more_processing = true;
2672 spin_unlock(®_requests_lock);
2674 cancel_crda_timeout();
2676 if (need_more_processing)
2677 schedule_work(®_work);
2681 * reg_process_hint_core - process core regulatory requests
2682 * @core_request: a pending core regulatory request
2684 * The wireless subsystem can use this function to process
2685 * a regulatory request issued by the regulatory core.
2687 * Returns: %REG_REQ_OK or %REG_REQ_IGNORE, indicating if the
2688 * hint was processed or ignored
2690 static enum reg_request_treatment
2691 reg_process_hint_core(struct regulatory_request *core_request)
2693 if (reg_query_database(core_request)) {
2694 core_request->intersect = false;
2695 core_request->processed = false;
2696 reg_update_last_request(core_request);
2700 return REG_REQ_IGNORE;
2703 static enum reg_request_treatment
2704 __reg_process_hint_user(struct regulatory_request *user_request)
2706 struct regulatory_request *lr = get_last_request();
2708 if (reg_request_cell_base(user_request))
2709 return reg_ignore_cell_hint(user_request);
2711 if (reg_request_cell_base(lr))
2712 return REG_REQ_IGNORE;
2714 if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE)
2715 return REG_REQ_INTERSECT;
2717 * If the user knows better the user should set the regdom
2718 * to their country before the IE is picked up
2720 if (lr->initiator == NL80211_REGDOM_SET_BY_USER &&
2722 return REG_REQ_IGNORE;
2724 * Process user requests only after previous user/driver/core
2725 * requests have been processed
2727 if ((lr->initiator == NL80211_REGDOM_SET_BY_CORE ||
2728 lr->initiator == NL80211_REGDOM_SET_BY_DRIVER ||
2729 lr->initiator == NL80211_REGDOM_SET_BY_USER) &&
2730 regdom_changes(lr->alpha2))
2731 return REG_REQ_IGNORE;
2733 if (!regdom_changes(user_request->alpha2))
2734 return REG_REQ_ALREADY_SET;
2740 * reg_process_hint_user - process user regulatory requests
2741 * @user_request: a pending user regulatory request
2743 * The wireless subsystem can use this function to process
2744 * a regulatory request initiated by userspace.
2746 * Returns: %REG_REQ_OK or %REG_REQ_IGNORE, indicating if the
2747 * hint was processed or ignored
2749 static enum reg_request_treatment
2750 reg_process_hint_user(struct regulatory_request *user_request)
2752 enum reg_request_treatment treatment;
2754 treatment = __reg_process_hint_user(user_request);
2755 if (treatment == REG_REQ_IGNORE ||
2756 treatment == REG_REQ_ALREADY_SET)
2757 return REG_REQ_IGNORE;
2759 user_request->intersect = treatment == REG_REQ_INTERSECT;
2760 user_request->processed = false;
2762 if (reg_query_database(user_request)) {
2763 reg_update_last_request(user_request);
2764 user_alpha2[0] = user_request->alpha2[0];
2765 user_alpha2[1] = user_request->alpha2[1];
2769 return REG_REQ_IGNORE;
2772 static enum reg_request_treatment
2773 __reg_process_hint_driver(struct regulatory_request *driver_request)
2775 struct regulatory_request *lr = get_last_request();
2777 if (lr->initiator == NL80211_REGDOM_SET_BY_CORE) {
2778 if (regdom_changes(driver_request->alpha2))
2780 return REG_REQ_ALREADY_SET;
2784 * This would happen if you unplug and plug your card
2785 * back in or if you add a new device for which the previously
2786 * loaded card also agrees on the regulatory domain.
2788 if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER &&
2789 !regdom_changes(driver_request->alpha2))
2790 return REG_REQ_ALREADY_SET;
2792 return REG_REQ_INTERSECT;
2796 * reg_process_hint_driver - process driver regulatory requests
2797 * @wiphy: the wireless device for the regulatory request
2798 * @driver_request: a pending driver regulatory request
2800 * The wireless subsystem can use this function to process
2801 * a regulatory request issued by an 802.11 driver.
2803 * Returns: one of the different reg request treatment values.
2805 static enum reg_request_treatment
2806 reg_process_hint_driver(struct wiphy *wiphy,
2807 struct regulatory_request *driver_request)
2809 const struct ieee80211_regdomain *regd, *tmp;
2810 enum reg_request_treatment treatment;
2812 treatment = __reg_process_hint_driver(driver_request);
2814 switch (treatment) {
2817 case REG_REQ_IGNORE:
2818 return REG_REQ_IGNORE;
2819 case REG_REQ_INTERSECT:
2820 case REG_REQ_ALREADY_SET:
2821 regd = reg_copy_regd(get_cfg80211_regdom());
2823 return REG_REQ_IGNORE;
2825 tmp = get_wiphy_regdom(wiphy);
2828 rcu_assign_pointer(wiphy->regd, regd);
2829 wiphy_unlock(wiphy);
2830 rcu_free_regdom(tmp);
2834 driver_request->intersect = treatment == REG_REQ_INTERSECT;
2835 driver_request->processed = false;
2838 * Since CRDA will not be called in this case as we already
2839 * have applied the requested regulatory domain before we just
2840 * inform userspace we have processed the request
2842 if (treatment == REG_REQ_ALREADY_SET) {
2843 nl80211_send_reg_change_event(driver_request);
2844 reg_update_last_request(driver_request);
2845 reg_set_request_processed();
2846 return REG_REQ_ALREADY_SET;
2849 if (reg_query_database(driver_request)) {
2850 reg_update_last_request(driver_request);
2854 return REG_REQ_IGNORE;
2857 static enum reg_request_treatment
2858 __reg_process_hint_country_ie(struct wiphy *wiphy,
2859 struct regulatory_request *country_ie_request)
2861 struct wiphy *last_wiphy = NULL;
2862 struct regulatory_request *lr = get_last_request();
2864 if (reg_request_cell_base(lr)) {
2865 /* Trust a Cell base station over the AP's country IE */
2866 if (regdom_changes(country_ie_request->alpha2))
2867 return REG_REQ_IGNORE;
2868 return REG_REQ_ALREADY_SET;
2870 if (wiphy->regulatory_flags & REGULATORY_COUNTRY_IE_IGNORE)
2871 return REG_REQ_IGNORE;
2874 if (unlikely(!is_an_alpha2(country_ie_request->alpha2)))
2877 if (lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE)
2880 last_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx);
2882 if (last_wiphy != wiphy) {
2884 * Two cards with two APs claiming different
2885 * Country IE alpha2s. We could
2886 * intersect them, but that seems unlikely
2887 * to be correct. Reject second one for now.
2889 if (regdom_changes(country_ie_request->alpha2))
2890 return REG_REQ_IGNORE;
2891 return REG_REQ_ALREADY_SET;
2894 if (regdom_changes(country_ie_request->alpha2))
2896 return REG_REQ_ALREADY_SET;
2900 * reg_process_hint_country_ie - process regulatory requests from country IEs
2901 * @wiphy: the wireless device for the regulatory request
2902 * @country_ie_request: a regulatory request from a country IE
2904 * The wireless subsystem can use this function to process
2905 * a regulatory request issued by a country Information Element.
2907 * Returns: one of the different reg request treatment values.
2909 static enum reg_request_treatment
2910 reg_process_hint_country_ie(struct wiphy *wiphy,
2911 struct regulatory_request *country_ie_request)
2913 enum reg_request_treatment treatment;
2915 treatment = __reg_process_hint_country_ie(wiphy, country_ie_request);
2917 switch (treatment) {
2920 case REG_REQ_IGNORE:
2921 return REG_REQ_IGNORE;
2922 case REG_REQ_ALREADY_SET:
2923 reg_free_request(country_ie_request);
2924 return REG_REQ_ALREADY_SET;
2925 case REG_REQ_INTERSECT:
2927 * This doesn't happen yet, not sure we
2928 * ever want to support it for this case.
2930 WARN_ONCE(1, "Unexpected intersection for country elements");
2931 return REG_REQ_IGNORE;
2934 country_ie_request->intersect = false;
2935 country_ie_request->processed = false;
2937 if (reg_query_database(country_ie_request)) {
2938 reg_update_last_request(country_ie_request);
2942 return REG_REQ_IGNORE;
2945 bool reg_dfs_domain_same(struct wiphy *wiphy1, struct wiphy *wiphy2)
2947 const struct ieee80211_regdomain *wiphy1_regd = NULL;
2948 const struct ieee80211_regdomain *wiphy2_regd = NULL;
2949 const struct ieee80211_regdomain *cfg80211_regd = NULL;
2950 bool dfs_domain_same;
2954 cfg80211_regd = rcu_dereference(cfg80211_regdomain);
2955 wiphy1_regd = rcu_dereference(wiphy1->regd);
2957 wiphy1_regd = cfg80211_regd;
2959 wiphy2_regd = rcu_dereference(wiphy2->regd);
2961 wiphy2_regd = cfg80211_regd;
2963 dfs_domain_same = wiphy1_regd->dfs_region == wiphy2_regd->dfs_region;
2967 return dfs_domain_same;
2970 static void reg_copy_dfs_chan_state(struct ieee80211_channel *dst_chan,
2971 struct ieee80211_channel *src_chan)
2973 if (!(dst_chan->flags & IEEE80211_CHAN_RADAR) ||
2974 !(src_chan->flags & IEEE80211_CHAN_RADAR))
2977 if (dst_chan->flags & IEEE80211_CHAN_DISABLED ||
2978 src_chan->flags & IEEE80211_CHAN_DISABLED)
2981 if (src_chan->center_freq == dst_chan->center_freq &&
2982 dst_chan->dfs_state == NL80211_DFS_USABLE) {
2983 dst_chan->dfs_state = src_chan->dfs_state;
2984 dst_chan->dfs_state_entered = src_chan->dfs_state_entered;
2988 static void wiphy_share_dfs_chan_state(struct wiphy *dst_wiphy,
2989 struct wiphy *src_wiphy)
2991 struct ieee80211_supported_band *src_sband, *dst_sband;
2992 struct ieee80211_channel *src_chan, *dst_chan;
2995 if (!reg_dfs_domain_same(dst_wiphy, src_wiphy))
2998 for (band = 0; band < NUM_NL80211_BANDS; band++) {
2999 dst_sband = dst_wiphy->bands[band];
3000 src_sband = src_wiphy->bands[band];
3001 if (!dst_sband || !src_sband)
3004 for (i = 0; i < dst_sband->n_channels; i++) {
3005 dst_chan = &dst_sband->channels[i];
3006 for (j = 0; j < src_sband->n_channels; j++) {
3007 src_chan = &src_sband->channels[j];
3008 reg_copy_dfs_chan_state(dst_chan, src_chan);
3014 static void wiphy_all_share_dfs_chan_state(struct wiphy *wiphy)
3016 struct cfg80211_registered_device *rdev;
3020 for_each_rdev(rdev) {
3021 if (wiphy == &rdev->wiphy)
3023 wiphy_share_dfs_chan_state(wiphy, &rdev->wiphy);
3027 /* This processes *all* regulatory hints */
3028 static void reg_process_hint(struct regulatory_request *reg_request)
3030 struct wiphy *wiphy = NULL;
3031 enum reg_request_treatment treatment;
3032 enum nl80211_reg_initiator initiator = reg_request->initiator;
3034 if (reg_request->wiphy_idx != WIPHY_IDX_INVALID)
3035 wiphy = wiphy_idx_to_wiphy(reg_request->wiphy_idx);
3037 switch (initiator) {
3038 case NL80211_REGDOM_SET_BY_CORE:
3039 treatment = reg_process_hint_core(reg_request);
3041 case NL80211_REGDOM_SET_BY_USER:
3042 treatment = reg_process_hint_user(reg_request);
3044 case NL80211_REGDOM_SET_BY_DRIVER:
3047 treatment = reg_process_hint_driver(wiphy, reg_request);
3049 case NL80211_REGDOM_SET_BY_COUNTRY_IE:
3052 treatment = reg_process_hint_country_ie(wiphy, reg_request);
3055 WARN(1, "invalid initiator %d\n", initiator);
3059 if (treatment == REG_REQ_IGNORE)
3062 WARN(treatment != REG_REQ_OK && treatment != REG_REQ_ALREADY_SET,
3063 "unexpected treatment value %d\n", treatment);
3065 /* This is required so that the orig_* parameters are saved.
3066 * NOTE: treatment must be set for any case that reaches here!
3068 if (treatment == REG_REQ_ALREADY_SET && wiphy &&
3069 wiphy->regulatory_flags & REGULATORY_STRICT_REG) {
3070 wiphy_update_regulatory(wiphy, initiator);
3071 wiphy_all_share_dfs_chan_state(wiphy);
3072 reg_check_channels();
3078 reg_free_request(reg_request);
3081 static void notify_self_managed_wiphys(struct regulatory_request *request)
3083 struct cfg80211_registered_device *rdev;
3084 struct wiphy *wiphy;
3086 for_each_rdev(rdev) {
3087 wiphy = &rdev->wiphy;
3088 if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED &&
3089 request->initiator == NL80211_REGDOM_SET_BY_USER)
3090 reg_call_notifier(wiphy, request);
3095 * Processes regulatory hints, this is all the NL80211_REGDOM_SET_BY_*
3096 * Regulatory hints come on a first come first serve basis and we
3097 * must process each one atomically.
3099 static void reg_process_pending_hints(void)
3101 struct regulatory_request *reg_request, *lr;
3103 lr = get_last_request();
3105 /* When last_request->processed becomes true this will be rescheduled */
3106 if (lr && !lr->processed) {
3107 pr_debug("Pending regulatory request, waiting for it to be processed...\n");
3111 spin_lock(®_requests_lock);
3113 if (list_empty(®_requests_list)) {
3114 spin_unlock(®_requests_lock);
3118 reg_request = list_first_entry(®_requests_list,
3119 struct regulatory_request,
3121 list_del_init(®_request->list);
3123 spin_unlock(®_requests_lock);
3125 notify_self_managed_wiphys(reg_request);
3127 reg_process_hint(reg_request);
3129 lr = get_last_request();
3131 spin_lock(®_requests_lock);
3132 if (!list_empty(®_requests_list) && lr && lr->processed)
3133 schedule_work(®_work);
3134 spin_unlock(®_requests_lock);
3137 /* Processes beacon hints -- this has nothing to do with country IEs */
3138 static void reg_process_pending_beacon_hints(void)
3140 struct cfg80211_registered_device *rdev;
3141 struct reg_beacon *pending_beacon, *tmp;
3143 /* This goes through the _pending_ beacon list */
3144 spin_lock_bh(®_pending_beacons_lock);
3146 list_for_each_entry_safe(pending_beacon, tmp,
3147 ®_pending_beacons, list) {
3148 list_del_init(&pending_beacon->list);
3150 /* Applies the beacon hint to current wiphys */
3152 wiphy_update_new_beacon(&rdev->wiphy, pending_beacon);
3154 /* Remembers the beacon hint for new wiphys or reg changes */
3155 list_add_tail(&pending_beacon->list, ®_beacon_list);
3158 spin_unlock_bh(®_pending_beacons_lock);
3161 static void reg_process_self_managed_hint(struct wiphy *wiphy)
3163 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
3164 const struct ieee80211_regdomain *tmp;
3165 const struct ieee80211_regdomain *regd;
3166 enum nl80211_band band;
3167 struct regulatory_request request = {};
3170 lockdep_assert_wiphy(wiphy);
3172 spin_lock(®_requests_lock);
3173 regd = rdev->requested_regd;
3174 rdev->requested_regd = NULL;
3175 spin_unlock(®_requests_lock);
3180 tmp = get_wiphy_regdom(wiphy);
3181 rcu_assign_pointer(wiphy->regd, regd);
3182 rcu_free_regdom(tmp);
3184 for (band = 0; band < NUM_NL80211_BANDS; band++)
3185 handle_band_custom(wiphy, wiphy->bands[band], regd);
3187 reg_process_ht_flags(wiphy);
3189 request.wiphy_idx = get_wiphy_idx(wiphy);
3190 request.alpha2[0] = regd->alpha2[0];
3191 request.alpha2[1] = regd->alpha2[1];
3192 request.initiator = NL80211_REGDOM_SET_BY_DRIVER;
3194 if (wiphy->flags & WIPHY_FLAG_NOTIFY_REGDOM_BY_DRIVER)
3195 reg_call_notifier(wiphy, &request);
3197 nl80211_send_wiphy_reg_change_event(&request);
3200 static void reg_process_self_managed_hints(void)
3202 struct cfg80211_registered_device *rdev;
3206 for_each_rdev(rdev) {
3207 wiphy_lock(&rdev->wiphy);
3208 reg_process_self_managed_hint(&rdev->wiphy);
3209 wiphy_unlock(&rdev->wiphy);
3212 reg_check_channels();
3215 static void reg_todo(struct work_struct *work)
3218 reg_process_pending_hints();
3219 reg_process_pending_beacon_hints();
3220 reg_process_self_managed_hints();
3224 static void queue_regulatory_request(struct regulatory_request *request)
3226 request->alpha2[0] = toupper(request->alpha2[0]);
3227 request->alpha2[1] = toupper(request->alpha2[1]);
3229 spin_lock(®_requests_lock);
3230 list_add_tail(&request->list, ®_requests_list);
3231 spin_unlock(®_requests_lock);
3233 schedule_work(®_work);
3237 * Core regulatory hint -- happens during cfg80211_init()
3238 * and when we restore regulatory settings.
3240 static int regulatory_hint_core(const char *alpha2)
3242 struct regulatory_request *request;
3244 request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL);
3248 request->alpha2[0] = alpha2[0];
3249 request->alpha2[1] = alpha2[1];
3250 request->initiator = NL80211_REGDOM_SET_BY_CORE;
3251 request->wiphy_idx = WIPHY_IDX_INVALID;
3253 queue_regulatory_request(request);
3259 int regulatory_hint_user(const char *alpha2,
3260 enum nl80211_user_reg_hint_type user_reg_hint_type)
3262 struct regulatory_request *request;
3264 if (WARN_ON(!alpha2))
3267 if (!is_world_regdom(alpha2) && !is_an_alpha2(alpha2))
3270 request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL);
3274 request->wiphy_idx = WIPHY_IDX_INVALID;
3275 request->alpha2[0] = alpha2[0];
3276 request->alpha2[1] = alpha2[1];
3277 request->initiator = NL80211_REGDOM_SET_BY_USER;
3278 request->user_reg_hint_type = user_reg_hint_type;
3280 /* Allow calling CRDA again */
3281 reset_crda_timeouts();
3283 queue_regulatory_request(request);
3288 int regulatory_hint_indoor(bool is_indoor, u32 portid)
3290 spin_lock(®_indoor_lock);
3292 /* It is possible that more than one user space process is trying to
3293 * configure the indoor setting. To handle such cases, clear the indoor
3294 * setting in case that some process does not think that the device
3295 * is operating in an indoor environment. In addition, if a user space
3296 * process indicates that it is controlling the indoor setting, save its
3297 * portid, i.e., make it the owner.
3299 reg_is_indoor = is_indoor;
3300 if (reg_is_indoor) {
3301 if (!reg_is_indoor_portid)
3302 reg_is_indoor_portid = portid;
3304 reg_is_indoor_portid = 0;
3307 spin_unlock(®_indoor_lock);
3310 reg_check_channels();
3315 void regulatory_netlink_notify(u32 portid)
3317 spin_lock(®_indoor_lock);
3319 if (reg_is_indoor_portid != portid) {
3320 spin_unlock(®_indoor_lock);
3324 reg_is_indoor = false;
3325 reg_is_indoor_portid = 0;
3327 spin_unlock(®_indoor_lock);
3329 reg_check_channels();
3333 int regulatory_hint(struct wiphy *wiphy, const char *alpha2)
3335 struct regulatory_request *request;
3337 if (WARN_ON(!alpha2 || !wiphy))
3340 wiphy->regulatory_flags &= ~REGULATORY_CUSTOM_REG;
3342 request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL);
3346 request->wiphy_idx = get_wiphy_idx(wiphy);
3348 request->alpha2[0] = alpha2[0];
3349 request->alpha2[1] = alpha2[1];
3350 request->initiator = NL80211_REGDOM_SET_BY_DRIVER;
3352 /* Allow calling CRDA again */
3353 reset_crda_timeouts();
3355 queue_regulatory_request(request);
3359 EXPORT_SYMBOL(regulatory_hint);
3361 void regulatory_hint_country_ie(struct wiphy *wiphy, enum nl80211_band band,
3362 const u8 *country_ie, u8 country_ie_len)
3365 enum environment_cap env = ENVIRON_ANY;
3366 struct regulatory_request *request = NULL, *lr;
3368 /* IE len must be evenly divisible by 2 */
3369 if (country_ie_len & 0x01)
3372 if (country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
3375 request = kzalloc(sizeof(*request), GFP_KERNEL);
3379 alpha2[0] = country_ie[0];
3380 alpha2[1] = country_ie[1];
3382 if (country_ie[2] == 'I')
3383 env = ENVIRON_INDOOR;
3384 else if (country_ie[2] == 'O')
3385 env = ENVIRON_OUTDOOR;
3388 lr = get_last_request();
3394 * We will run this only upon a successful connection on cfg80211.
3395 * We leave conflict resolution to the workqueue, where can hold
3398 if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE &&
3399 lr->wiphy_idx != WIPHY_IDX_INVALID)
3402 request->wiphy_idx = get_wiphy_idx(wiphy);
3403 request->alpha2[0] = alpha2[0];
3404 request->alpha2[1] = alpha2[1];
3405 request->initiator = NL80211_REGDOM_SET_BY_COUNTRY_IE;
3406 request->country_ie_env = env;
3408 /* Allow calling CRDA again */
3409 reset_crda_timeouts();
3411 queue_regulatory_request(request);
3418 static void restore_alpha2(char *alpha2, bool reset_user)
3420 /* indicates there is no alpha2 to consider for restoration */
3424 /* The user setting has precedence over the module parameter */
3425 if (is_user_regdom_saved()) {
3426 /* Unless we're asked to ignore it and reset it */
3428 pr_debug("Restoring regulatory settings including user preference\n");
3429 user_alpha2[0] = '9';
3430 user_alpha2[1] = '7';
3433 * If we're ignoring user settings, we still need to
3434 * check the module parameter to ensure we put things
3435 * back as they were for a full restore.
3437 if (!is_world_regdom(ieee80211_regdom)) {
3438 pr_debug("Keeping preference on module parameter ieee80211_regdom: %c%c\n",
3439 ieee80211_regdom[0], ieee80211_regdom[1]);
3440 alpha2[0] = ieee80211_regdom[0];
3441 alpha2[1] = ieee80211_regdom[1];
3444 pr_debug("Restoring regulatory settings while preserving user preference for: %c%c\n",
3445 user_alpha2[0], user_alpha2[1]);
3446 alpha2[0] = user_alpha2[0];
3447 alpha2[1] = user_alpha2[1];
3449 } else if (!is_world_regdom(ieee80211_regdom)) {
3450 pr_debug("Keeping preference on module parameter ieee80211_regdom: %c%c\n",
3451 ieee80211_regdom[0], ieee80211_regdom[1]);
3452 alpha2[0] = ieee80211_regdom[0];
3453 alpha2[1] = ieee80211_regdom[1];
3455 pr_debug("Restoring regulatory settings\n");
3458 static void restore_custom_reg_settings(struct wiphy *wiphy)
3460 struct ieee80211_supported_band *sband;
3461 enum nl80211_band band;
3462 struct ieee80211_channel *chan;
3465 for (band = 0; band < NUM_NL80211_BANDS; band++) {
3466 sband = wiphy->bands[band];
3469 for (i = 0; i < sband->n_channels; i++) {
3470 chan = &sband->channels[i];
3471 chan->flags = chan->orig_flags;
3472 chan->max_antenna_gain = chan->orig_mag;
3473 chan->max_power = chan->orig_mpwr;
3474 chan->beacon_found = false;
3480 * Restoring regulatory settings involves ignoring any
3481 * possibly stale country IE information and user regulatory
3482 * settings if so desired, this includes any beacon hints
3483 * learned as we could have traveled outside to another country
3484 * after disconnection. To restore regulatory settings we do
3485 * exactly what we did at bootup:
3487 * - send a core regulatory hint
3488 * - send a user regulatory hint if applicable
3490 * Device drivers that send a regulatory hint for a specific country
3491 * keep their own regulatory domain on wiphy->regd so that does
3492 * not need to be remembered.
3494 static void restore_regulatory_settings(bool reset_user, bool cached)
3497 char world_alpha2[2];
3498 struct reg_beacon *reg_beacon, *btmp;
3499 LIST_HEAD(tmp_reg_req_list);
3500 struct cfg80211_registered_device *rdev;
3505 * Clear the indoor setting in case that it is not controlled by user
3506 * space, as otherwise there is no guarantee that the device is still
3507 * operating in an indoor environment.
3509 spin_lock(®_indoor_lock);
3510 if (reg_is_indoor && !reg_is_indoor_portid) {
3511 reg_is_indoor = false;
3512 reg_check_channels();
3514 spin_unlock(®_indoor_lock);
3516 reset_regdomains(true, &world_regdom);
3517 restore_alpha2(alpha2, reset_user);
3520 * If there's any pending requests we simply
3521 * stash them to a temporary pending queue and
3522 * add then after we've restored regulatory
3525 spin_lock(®_requests_lock);
3526 list_splice_tail_init(®_requests_list, &tmp_reg_req_list);
3527 spin_unlock(®_requests_lock);
3529 /* Clear beacon hints */
3530 spin_lock_bh(®_pending_beacons_lock);
3531 list_for_each_entry_safe(reg_beacon, btmp, ®_pending_beacons, list) {
3532 list_del(®_beacon->list);
3535 spin_unlock_bh(®_pending_beacons_lock);
3537 list_for_each_entry_safe(reg_beacon, btmp, ®_beacon_list, list) {
3538 list_del(®_beacon->list);
3542 /* First restore to the basic regulatory settings */
3543 world_alpha2[0] = cfg80211_world_regdom->alpha2[0];
3544 world_alpha2[1] = cfg80211_world_regdom->alpha2[1];
3546 for_each_rdev(rdev) {
3547 if (rdev->wiphy.regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED)
3549 if (rdev->wiphy.regulatory_flags & REGULATORY_CUSTOM_REG)
3550 restore_custom_reg_settings(&rdev->wiphy);
3553 if (cached && (!is_an_alpha2(alpha2) ||
3554 !IS_ERR_OR_NULL(cfg80211_user_regdom))) {
3555 reset_regdomains(false, cfg80211_world_regdom);
3556 update_all_wiphy_regulatory(NL80211_REGDOM_SET_BY_CORE);
3557 print_regdomain(get_cfg80211_regdom());
3558 nl80211_send_reg_change_event(&core_request_world);
3559 reg_set_request_processed();
3561 if (is_an_alpha2(alpha2) &&
3562 !regulatory_hint_user(alpha2, NL80211_USER_REG_HINT_USER)) {
3563 struct regulatory_request *ureq;
3565 spin_lock(®_requests_lock);
3566 ureq = list_last_entry(®_requests_list,
3567 struct regulatory_request,
3569 list_del(&ureq->list);
3570 spin_unlock(®_requests_lock);
3572 notify_self_managed_wiphys(ureq);
3573 reg_update_last_request(ureq);
3574 set_regdom(reg_copy_regd(cfg80211_user_regdom),
3575 REGD_SOURCE_CACHED);
3578 regulatory_hint_core(world_alpha2);
3581 * This restores the ieee80211_regdom module parameter
3582 * preference or the last user requested regulatory
3583 * settings, user regulatory settings takes precedence.
3585 if (is_an_alpha2(alpha2))
3586 regulatory_hint_user(alpha2, NL80211_USER_REG_HINT_USER);
3589 spin_lock(®_requests_lock);
3590 list_splice_tail_init(&tmp_reg_req_list, ®_requests_list);
3591 spin_unlock(®_requests_lock);
3593 pr_debug("Kicking the queue\n");
3595 schedule_work(®_work);
3598 static bool is_wiphy_all_set_reg_flag(enum ieee80211_regulatory_flags flag)
3600 struct cfg80211_registered_device *rdev;
3601 struct wireless_dev *wdev;
3603 for_each_rdev(rdev) {
3604 wiphy_lock(&rdev->wiphy);
3605 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
3606 if (!(wdev->wiphy->regulatory_flags & flag)) {
3607 wiphy_unlock(&rdev->wiphy);
3611 wiphy_unlock(&rdev->wiphy);
3617 void regulatory_hint_disconnect(void)
3619 /* Restore of regulatory settings is not required when wiphy(s)
3620 * ignore IE from connected access point but clearance of beacon hints
3621 * is required when wiphy(s) supports beacon hints.
3623 if (is_wiphy_all_set_reg_flag(REGULATORY_COUNTRY_IE_IGNORE)) {
3624 struct reg_beacon *reg_beacon, *btmp;
3626 if (is_wiphy_all_set_reg_flag(REGULATORY_DISABLE_BEACON_HINTS))
3629 spin_lock_bh(®_pending_beacons_lock);
3630 list_for_each_entry_safe(reg_beacon, btmp,
3631 ®_pending_beacons, list) {
3632 list_del(®_beacon->list);
3635 spin_unlock_bh(®_pending_beacons_lock);
3637 list_for_each_entry_safe(reg_beacon, btmp,
3638 ®_beacon_list, list) {
3639 list_del(®_beacon->list);
3646 pr_debug("All devices are disconnected, going to restore regulatory settings\n");
3647 restore_regulatory_settings(false, true);
3650 static bool freq_is_chan_12_13_14(u32 freq)
3652 if (freq == ieee80211_channel_to_frequency(12, NL80211_BAND_2GHZ) ||
3653 freq == ieee80211_channel_to_frequency(13, NL80211_BAND_2GHZ) ||
3654 freq == ieee80211_channel_to_frequency(14, NL80211_BAND_2GHZ))
3659 static bool pending_reg_beacon(struct ieee80211_channel *beacon_chan)
3661 struct reg_beacon *pending_beacon;
3663 list_for_each_entry(pending_beacon, ®_pending_beacons, list)
3664 if (ieee80211_channel_equal(beacon_chan,
3665 &pending_beacon->chan))
3670 int regulatory_hint_found_beacon(struct wiphy *wiphy,
3671 struct ieee80211_channel *beacon_chan,
3674 struct reg_beacon *reg_beacon;
3677 if (beacon_chan->beacon_found ||
3678 beacon_chan->flags & IEEE80211_CHAN_RADAR ||
3679 (beacon_chan->band == NL80211_BAND_2GHZ &&
3680 !freq_is_chan_12_13_14(beacon_chan->center_freq)))
3683 spin_lock_bh(®_pending_beacons_lock);
3684 processing = pending_reg_beacon(beacon_chan);
3685 spin_unlock_bh(®_pending_beacons_lock);
3690 reg_beacon = kzalloc(sizeof(struct reg_beacon), gfp);
3694 pr_debug("Found new beacon on frequency: %d.%03d MHz (Ch %d) on %s\n",
3695 beacon_chan->center_freq, beacon_chan->freq_offset,
3696 ieee80211_freq_khz_to_channel(
3697 ieee80211_channel_to_khz(beacon_chan)),
3700 memcpy(®_beacon->chan, beacon_chan,
3701 sizeof(struct ieee80211_channel));
3704 * Since we can be called from BH or and non-BH context
3705 * we must use spin_lock_bh()
3707 spin_lock_bh(®_pending_beacons_lock);
3708 list_add_tail(®_beacon->list, ®_pending_beacons);
3709 spin_unlock_bh(®_pending_beacons_lock);
3711 schedule_work(®_work);
3716 static void print_rd_rules(const struct ieee80211_regdomain *rd)
3719 const struct ieee80211_reg_rule *reg_rule = NULL;
3720 const struct ieee80211_freq_range *freq_range = NULL;
3721 const struct ieee80211_power_rule *power_rule = NULL;
3722 char bw[32], cac_time[32];
3724 pr_debug(" (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp), (dfs_cac_time)\n");
3726 for (i = 0; i < rd->n_reg_rules; i++) {
3727 reg_rule = &rd->reg_rules[i];
3728 freq_range = ®_rule->freq_range;
3729 power_rule = ®_rule->power_rule;
3731 if (reg_rule->flags & NL80211_RRF_AUTO_BW)
3732 snprintf(bw, sizeof(bw), "%d KHz, %u KHz AUTO",
3733 freq_range->max_bandwidth_khz,
3734 reg_get_max_bandwidth(rd, reg_rule));
3736 snprintf(bw, sizeof(bw), "%d KHz",
3737 freq_range->max_bandwidth_khz);
3739 if (reg_rule->flags & NL80211_RRF_DFS)
3740 scnprintf(cac_time, sizeof(cac_time), "%u s",
3741 reg_rule->dfs_cac_ms/1000);
3743 scnprintf(cac_time, sizeof(cac_time), "N/A");
3747 * There may not be documentation for max antenna gain
3748 * in certain regions
3750 if (power_rule->max_antenna_gain)
3751 pr_debug(" (%d KHz - %d KHz @ %s), (%d mBi, %d mBm), (%s)\n",
3752 freq_range->start_freq_khz,
3753 freq_range->end_freq_khz,
3755 power_rule->max_antenna_gain,
3756 power_rule->max_eirp,
3759 pr_debug(" (%d KHz - %d KHz @ %s), (N/A, %d mBm), (%s)\n",
3760 freq_range->start_freq_khz,
3761 freq_range->end_freq_khz,
3763 power_rule->max_eirp,
3768 bool reg_supported_dfs_region(enum nl80211_dfs_regions dfs_region)
3770 switch (dfs_region) {
3771 case NL80211_DFS_UNSET:
3772 case NL80211_DFS_FCC:
3773 case NL80211_DFS_ETSI:
3774 case NL80211_DFS_JP:
3777 pr_debug("Ignoring unknown DFS master region: %d\n", dfs_region);
3782 static void print_regdomain(const struct ieee80211_regdomain *rd)
3784 struct regulatory_request *lr = get_last_request();
3786 if (is_intersected_alpha2(rd->alpha2)) {
3787 if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) {
3788 struct cfg80211_registered_device *rdev;
3789 rdev = cfg80211_rdev_by_wiphy_idx(lr->wiphy_idx);
3791 pr_debug("Current regulatory domain updated by AP to: %c%c\n",
3792 rdev->country_ie_alpha2[0],
3793 rdev->country_ie_alpha2[1]);
3795 pr_debug("Current regulatory domain intersected:\n");
3797 pr_debug("Current regulatory domain intersected:\n");
3798 } else if (is_world_regdom(rd->alpha2)) {
3799 pr_debug("World regulatory domain updated:\n");
3801 if (is_unknown_alpha2(rd->alpha2))
3802 pr_debug("Regulatory domain changed to driver built-in settings (unknown country)\n");
3804 if (reg_request_cell_base(lr))
3805 pr_debug("Regulatory domain changed to country: %c%c by Cell Station\n",
3806 rd->alpha2[0], rd->alpha2[1]);
3808 pr_debug("Regulatory domain changed to country: %c%c\n",
3809 rd->alpha2[0], rd->alpha2[1]);
3813 pr_debug(" DFS Master region: %s", reg_dfs_region_str(rd->dfs_region));
3817 static void print_regdomain_info(const struct ieee80211_regdomain *rd)
3819 pr_debug("Regulatory domain: %c%c\n", rd->alpha2[0], rd->alpha2[1]);
3823 static int reg_set_rd_core(const struct ieee80211_regdomain *rd)
3825 if (!is_world_regdom(rd->alpha2))
3827 update_world_regdomain(rd);
3831 static int reg_set_rd_user(const struct ieee80211_regdomain *rd,
3832 struct regulatory_request *user_request)
3834 const struct ieee80211_regdomain *intersected_rd = NULL;
3836 if (!regdom_changes(rd->alpha2))
3839 if (!is_valid_rd(rd)) {
3840 pr_err("Invalid regulatory domain detected: %c%c\n",
3841 rd->alpha2[0], rd->alpha2[1]);
3842 print_regdomain_info(rd);
3846 if (!user_request->intersect) {
3847 reset_regdomains(false, rd);
3851 intersected_rd = regdom_intersect(rd, get_cfg80211_regdom());
3852 if (!intersected_rd)
3857 reset_regdomains(false, intersected_rd);
3862 static int reg_set_rd_driver(const struct ieee80211_regdomain *rd,
3863 struct regulatory_request *driver_request)
3865 const struct ieee80211_regdomain *regd;
3866 const struct ieee80211_regdomain *intersected_rd = NULL;
3867 const struct ieee80211_regdomain *tmp = NULL;
3868 struct wiphy *request_wiphy;
3870 if (is_world_regdom(rd->alpha2))
3873 if (!regdom_changes(rd->alpha2))
3876 if (!is_valid_rd(rd)) {
3877 pr_err("Invalid regulatory domain detected: %c%c\n",
3878 rd->alpha2[0], rd->alpha2[1]);
3879 print_regdomain_info(rd);
3883 request_wiphy = wiphy_idx_to_wiphy(driver_request->wiphy_idx);
3887 if (!driver_request->intersect) {
3889 wiphy_lock(request_wiphy);
3890 if (request_wiphy->regd)
3891 tmp = get_wiphy_regdom(request_wiphy);
3893 regd = reg_copy_regd(rd);
3895 wiphy_unlock(request_wiphy);
3896 return PTR_ERR(regd);
3899 rcu_assign_pointer(request_wiphy->regd, regd);
3900 rcu_free_regdom(tmp);
3901 wiphy_unlock(request_wiphy);
3902 reset_regdomains(false, rd);
3906 intersected_rd = regdom_intersect(rd, get_cfg80211_regdom());
3907 if (!intersected_rd)
3911 * We can trash what CRDA provided now.
3912 * However if a driver requested this specific regulatory
3913 * domain we keep it for its private use
3915 tmp = get_wiphy_regdom(request_wiphy);
3916 rcu_assign_pointer(request_wiphy->regd, rd);
3917 rcu_free_regdom(tmp);
3921 reset_regdomains(false, intersected_rd);
3926 static int reg_set_rd_country_ie(const struct ieee80211_regdomain *rd,
3927 struct regulatory_request *country_ie_request)
3929 struct wiphy *request_wiphy;
3931 if (!is_alpha2_set(rd->alpha2) && !is_an_alpha2(rd->alpha2) &&
3932 !is_unknown_alpha2(rd->alpha2))
3936 * Lets only bother proceeding on the same alpha2 if the current
3937 * rd is non static (it means CRDA was present and was used last)
3938 * and the pending request came in from a country IE
3941 if (!is_valid_rd(rd)) {
3942 pr_err("Invalid regulatory domain detected: %c%c\n",
3943 rd->alpha2[0], rd->alpha2[1]);
3944 print_regdomain_info(rd);
3948 request_wiphy = wiphy_idx_to_wiphy(country_ie_request->wiphy_idx);
3952 if (country_ie_request->intersect)
3955 reset_regdomains(false, rd);
3960 * Use this call to set the current regulatory domain. Conflicts with
3961 * multiple drivers can be ironed out later. Caller must've already
3962 * kmalloc'd the rd structure.
3964 int set_regdom(const struct ieee80211_regdomain *rd,
3965 enum ieee80211_regd_source regd_src)
3967 struct regulatory_request *lr;
3968 bool user_reset = false;
3971 if (IS_ERR_OR_NULL(rd))
3974 if (!reg_is_valid_request(rd->alpha2)) {
3979 if (regd_src == REGD_SOURCE_CRDA)
3980 reset_crda_timeouts();
3982 lr = get_last_request();
3984 /* Note that this doesn't update the wiphys, this is done below */
3985 switch (lr->initiator) {
3986 case NL80211_REGDOM_SET_BY_CORE:
3987 r = reg_set_rd_core(rd);
3989 case NL80211_REGDOM_SET_BY_USER:
3990 cfg80211_save_user_regdom(rd);
3991 r = reg_set_rd_user(rd, lr);
3994 case NL80211_REGDOM_SET_BY_DRIVER:
3995 r = reg_set_rd_driver(rd, lr);
3997 case NL80211_REGDOM_SET_BY_COUNTRY_IE:
3998 r = reg_set_rd_country_ie(rd, lr);
4001 WARN(1, "invalid initiator %d\n", lr->initiator);
4009 reg_set_request_processed();
4012 /* Back to world regulatory in case of errors */
4013 restore_regulatory_settings(user_reset, false);
4020 /* This would make this whole thing pointless */
4021 if (WARN_ON(!lr->intersect && rd != get_cfg80211_regdom()))
4024 /* update all wiphys now with the new established regulatory domain */
4025 update_all_wiphy_regulatory(lr->initiator);
4027 print_regdomain(get_cfg80211_regdom());
4029 nl80211_send_reg_change_event(lr);
4031 reg_set_request_processed();
4036 static int __regulatory_set_wiphy_regd(struct wiphy *wiphy,
4037 struct ieee80211_regdomain *rd)
4039 const struct ieee80211_regdomain *regd;
4040 const struct ieee80211_regdomain *prev_regd;
4041 struct cfg80211_registered_device *rdev;
4043 if (WARN_ON(!wiphy || !rd))
4046 if (WARN(!(wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED),
4047 "wiphy should have REGULATORY_WIPHY_SELF_MANAGED\n"))
4050 if (WARN(!is_valid_rd(rd),
4051 "Invalid regulatory domain detected: %c%c\n",
4052 rd->alpha2[0], rd->alpha2[1])) {
4053 print_regdomain_info(rd);
4057 regd = reg_copy_regd(rd);
4059 return PTR_ERR(regd);
4061 rdev = wiphy_to_rdev(wiphy);
4063 spin_lock(®_requests_lock);
4064 prev_regd = rdev->requested_regd;
4065 rdev->requested_regd = regd;
4066 spin_unlock(®_requests_lock);
4072 int regulatory_set_wiphy_regd(struct wiphy *wiphy,
4073 struct ieee80211_regdomain *rd)
4075 int ret = __regulatory_set_wiphy_regd(wiphy, rd);
4080 schedule_work(®_work);
4083 EXPORT_SYMBOL(regulatory_set_wiphy_regd);
4085 int regulatory_set_wiphy_regd_sync(struct wiphy *wiphy,
4086 struct ieee80211_regdomain *rd)
4092 ret = __regulatory_set_wiphy_regd(wiphy, rd);
4096 /* process the request immediately */
4097 reg_process_self_managed_hint(wiphy);
4098 reg_check_channels();
4101 EXPORT_SYMBOL(regulatory_set_wiphy_regd_sync);
4103 void wiphy_regulatory_register(struct wiphy *wiphy)
4105 struct regulatory_request *lr = get_last_request();
4107 /* self-managed devices ignore beacon hints and country IE */
4108 if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) {
4109 wiphy->regulatory_flags |= REGULATORY_DISABLE_BEACON_HINTS |
4110 REGULATORY_COUNTRY_IE_IGNORE;
4113 * The last request may have been received before this
4114 * registration call. Call the driver notifier if
4115 * initiator is USER.
4117 if (lr->initiator == NL80211_REGDOM_SET_BY_USER)
4118 reg_call_notifier(wiphy, lr);
4121 if (!reg_dev_ignore_cell_hint(wiphy))
4122 reg_num_devs_support_basehint++;
4124 wiphy_update_regulatory(wiphy, lr->initiator);
4125 wiphy_all_share_dfs_chan_state(wiphy);
4126 reg_process_self_managed_hints();
4129 void wiphy_regulatory_deregister(struct wiphy *wiphy)
4131 struct wiphy *request_wiphy = NULL;
4132 struct regulatory_request *lr;
4134 lr = get_last_request();
4136 if (!reg_dev_ignore_cell_hint(wiphy))
4137 reg_num_devs_support_basehint--;
4139 rcu_free_regdom(get_wiphy_regdom(wiphy));
4140 RCU_INIT_POINTER(wiphy->regd, NULL);
4143 request_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx);
4145 if (!request_wiphy || request_wiphy != wiphy)
4148 lr->wiphy_idx = WIPHY_IDX_INVALID;
4149 lr->country_ie_env = ENVIRON_ANY;
4153 * See FCC notices for UNII band definitions
4154 * 5GHz: https://www.fcc.gov/document/5-ghz-unlicensed-spectrum-unii
4155 * 6GHz: https://www.fcc.gov/document/fcc-proposes-more-spectrum-unlicensed-use-0
4157 int cfg80211_get_unii(int freq)
4160 if (freq >= 5150 && freq <= 5250)
4164 if (freq > 5250 && freq <= 5350)
4168 if (freq > 5350 && freq <= 5470)
4172 if (freq > 5470 && freq <= 5725)
4176 if (freq > 5725 && freq <= 5825)
4180 if (freq > 5925 && freq <= 6425)
4184 if (freq > 6425 && freq <= 6525)
4188 if (freq > 6525 && freq <= 6875)
4192 if (freq > 6875 && freq <= 7125)
4198 bool regulatory_indoor_allowed(void)
4200 return reg_is_indoor;
4203 bool regulatory_pre_cac_allowed(struct wiphy *wiphy)
4205 const struct ieee80211_regdomain *regd = NULL;
4206 const struct ieee80211_regdomain *wiphy_regd = NULL;
4207 bool pre_cac_allowed = false;
4211 regd = rcu_dereference(cfg80211_regdomain);
4212 wiphy_regd = rcu_dereference(wiphy->regd);
4214 if (regd->dfs_region == NL80211_DFS_ETSI)
4215 pre_cac_allowed = true;
4219 return pre_cac_allowed;
4222 if (regd->dfs_region == wiphy_regd->dfs_region &&
4223 wiphy_regd->dfs_region == NL80211_DFS_ETSI)
4224 pre_cac_allowed = true;
4228 return pre_cac_allowed;
4230 EXPORT_SYMBOL(regulatory_pre_cac_allowed);
4232 static void cfg80211_check_and_end_cac(struct cfg80211_registered_device *rdev)
4234 struct wireless_dev *wdev;
4235 /* If we finished CAC or received radar, we should end any
4236 * CAC running on the same channels.
4237 * the check !cfg80211_chandef_dfs_usable contain 2 options:
4238 * either all channels are available - those the CAC_FINISHED
4239 * event has effected another wdev state, or there is a channel
4240 * in unavailable state in wdev chandef - those the RADAR_DETECTED
4241 * event has effected another wdev state.
4242 * In both cases we should end the CAC on the wdev.
4244 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
4245 struct cfg80211_chan_def *chandef;
4247 if (!wdev->cac_started)
4250 /* FIXME: radar detection is tied to link 0 for now */
4251 chandef = wdev_chandef(wdev, 0);
4255 if (!cfg80211_chandef_dfs_usable(&rdev->wiphy, chandef))
4256 rdev_end_cac(rdev, wdev->netdev);
4260 void regulatory_propagate_dfs_state(struct wiphy *wiphy,
4261 struct cfg80211_chan_def *chandef,
4262 enum nl80211_dfs_state dfs_state,
4263 enum nl80211_radar_event event)
4265 struct cfg80211_registered_device *rdev;
4269 if (WARN_ON(!cfg80211_chandef_valid(chandef)))
4272 for_each_rdev(rdev) {
4273 if (wiphy == &rdev->wiphy)
4276 if (!reg_dfs_domain_same(wiphy, &rdev->wiphy))
4279 if (!ieee80211_get_channel(&rdev->wiphy,
4280 chandef->chan->center_freq))
4283 cfg80211_set_dfs_state(&rdev->wiphy, chandef, dfs_state);
4285 if (event == NL80211_RADAR_DETECTED ||
4286 event == NL80211_RADAR_CAC_FINISHED) {
4287 cfg80211_sched_dfs_chan_update(rdev);
4288 cfg80211_check_and_end_cac(rdev);
4291 nl80211_radar_notify(rdev, chandef, event, NULL, GFP_KERNEL);
4295 static int __init regulatory_init_db(void)
4300 * It's possible that - due to other bugs/issues - cfg80211
4301 * never called regulatory_init() below, or that it failed;
4302 * in that case, don't try to do any further work here as
4303 * it's doomed to lead to crashes.
4305 if (IS_ERR_OR_NULL(reg_pdev))
4308 err = load_builtin_regdb_keys();
4310 platform_device_unregister(reg_pdev);
4314 /* We always try to get an update for the static regdomain */
4315 err = regulatory_hint_core(cfg80211_world_regdom->alpha2);
4317 if (err == -ENOMEM) {
4318 platform_device_unregister(reg_pdev);
4322 * N.B. kobject_uevent_env() can fail mainly for when we're out
4323 * memory which is handled and propagated appropriately above
4324 * but it can also fail during a netlink_broadcast() or during
4325 * early boot for call_usermodehelper(). For now treat these
4326 * errors as non-fatal.
4328 pr_err("kobject_uevent_env() was unable to call CRDA during init\n");
4332 * Finally, if the user set the module parameter treat it
4335 if (!is_world_regdom(ieee80211_regdom))
4336 regulatory_hint_user(ieee80211_regdom,
4337 NL80211_USER_REG_HINT_USER);
4342 late_initcall(regulatory_init_db);
4345 int __init regulatory_init(void)
4347 reg_pdev = platform_device_register_simple("regulatory", 0, NULL, 0);
4348 if (IS_ERR(reg_pdev))
4349 return PTR_ERR(reg_pdev);
4351 rcu_assign_pointer(cfg80211_regdomain, cfg80211_world_regdom);
4353 user_alpha2[0] = '9';
4354 user_alpha2[1] = '7';
4357 return regulatory_init_db();
4363 void regulatory_exit(void)
4365 struct regulatory_request *reg_request, *tmp;
4366 struct reg_beacon *reg_beacon, *btmp;
4368 cancel_work_sync(®_work);
4369 cancel_crda_timeout_sync();
4370 cancel_delayed_work_sync(®_check_chans);
4372 /* Lock to suppress warnings */
4374 reset_regdomains(true, NULL);
4377 dev_set_uevent_suppress(®_pdev->dev, true);
4379 platform_device_unregister(reg_pdev);
4381 list_for_each_entry_safe(reg_beacon, btmp, ®_pending_beacons, list) {
4382 list_del(®_beacon->list);
4386 list_for_each_entry_safe(reg_beacon, btmp, ®_beacon_list, list) {
4387 list_del(®_beacon->list);
4391 list_for_each_entry_safe(reg_request, tmp, ®_requests_list, list) {
4392 list_del(®_request->list);
4396 if (!IS_ERR_OR_NULL(regdb))
4398 if (!IS_ERR_OR_NULL(cfg80211_user_regdom))
4399 kfree(cfg80211_user_regdom);
4401 free_regdb_keyring();