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_PSD)
1597 channel_flags |= IEEE80211_CHAN_PSD;
1598 return channel_flags;
1601 static const struct ieee80211_reg_rule *
1602 freq_reg_info_regd(u32 center_freq,
1603 const struct ieee80211_regdomain *regd, u32 bw)
1606 bool band_rule_found = false;
1607 bool bw_fits = false;
1610 return ERR_PTR(-EINVAL);
1612 for (i = 0; i < regd->n_reg_rules; i++) {
1613 const struct ieee80211_reg_rule *rr;
1614 const struct ieee80211_freq_range *fr = NULL;
1616 rr = ®d->reg_rules[i];
1617 fr = &rr->freq_range;
1620 * We only need to know if one frequency rule was
1621 * in center_freq's band, that's enough, so let's
1622 * not overwrite it once found
1624 if (!band_rule_found)
1625 band_rule_found = freq_in_rule_band(fr, center_freq);
1627 bw_fits = cfg80211_does_bw_fit_range(fr, center_freq, bw);
1629 if (band_rule_found && bw_fits)
1633 if (!band_rule_found)
1634 return ERR_PTR(-ERANGE);
1636 return ERR_PTR(-EINVAL);
1639 static const struct ieee80211_reg_rule *
1640 __freq_reg_info(struct wiphy *wiphy, u32 center_freq, u32 min_bw)
1642 const struct ieee80211_regdomain *regd = reg_get_regdomain(wiphy);
1643 static const u32 bws[] = {0, 1, 2, 4, 5, 8, 10, 16, 20};
1644 const struct ieee80211_reg_rule *reg_rule = ERR_PTR(-ERANGE);
1645 int i = ARRAY_SIZE(bws) - 1;
1648 for (bw = MHZ_TO_KHZ(bws[i]); bw >= min_bw; bw = MHZ_TO_KHZ(bws[i--])) {
1649 reg_rule = freq_reg_info_regd(center_freq, regd, bw);
1650 if (!IS_ERR(reg_rule))
1657 const struct ieee80211_reg_rule *freq_reg_info(struct wiphy *wiphy,
1660 u32 min_bw = center_freq < MHZ_TO_KHZ(1000) ? 1 : 20;
1662 return __freq_reg_info(wiphy, center_freq, MHZ_TO_KHZ(min_bw));
1664 EXPORT_SYMBOL(freq_reg_info);
1666 const char *reg_initiator_name(enum nl80211_reg_initiator initiator)
1668 switch (initiator) {
1669 case NL80211_REGDOM_SET_BY_CORE:
1671 case NL80211_REGDOM_SET_BY_USER:
1673 case NL80211_REGDOM_SET_BY_DRIVER:
1675 case NL80211_REGDOM_SET_BY_COUNTRY_IE:
1676 return "country element";
1682 EXPORT_SYMBOL(reg_initiator_name);
1684 static uint32_t reg_rule_to_chan_bw_flags(const struct ieee80211_regdomain *regd,
1685 const struct ieee80211_reg_rule *reg_rule,
1686 const struct ieee80211_channel *chan)
1688 const struct ieee80211_freq_range *freq_range = NULL;
1689 u32 max_bandwidth_khz, center_freq_khz, bw_flags = 0;
1690 bool is_s1g = chan->band == NL80211_BAND_S1GHZ;
1692 freq_range = ®_rule->freq_range;
1694 max_bandwidth_khz = freq_range->max_bandwidth_khz;
1695 center_freq_khz = ieee80211_channel_to_khz(chan);
1696 /* Check if auto calculation requested */
1697 if (reg_rule->flags & NL80211_RRF_AUTO_BW)
1698 max_bandwidth_khz = reg_get_max_bandwidth(regd, reg_rule);
1700 /* If we get a reg_rule we can assume that at least 5Mhz fit */
1701 if (!cfg80211_does_bw_fit_range(freq_range,
1704 bw_flags |= IEEE80211_CHAN_NO_10MHZ;
1705 if (!cfg80211_does_bw_fit_range(freq_range,
1708 bw_flags |= IEEE80211_CHAN_NO_20MHZ;
1711 /* S1G is strict about non overlapping channels. We can
1712 * calculate which bandwidth is allowed per channel by finding
1713 * the largest bandwidth which cleanly divides the freq_range.
1716 int ch_bw = max_bandwidth_khz;
1719 edge_offset = (center_freq_khz - ch_bw / 2) -
1720 freq_range->start_freq_khz;
1721 if (edge_offset % ch_bw == 0) {
1722 switch (KHZ_TO_MHZ(ch_bw)) {
1724 bw_flags |= IEEE80211_CHAN_1MHZ;
1727 bw_flags |= IEEE80211_CHAN_2MHZ;
1730 bw_flags |= IEEE80211_CHAN_4MHZ;
1733 bw_flags |= IEEE80211_CHAN_8MHZ;
1736 bw_flags |= IEEE80211_CHAN_16MHZ;
1739 /* If we got here, no bandwidths fit on
1740 * this frequency, ie. band edge.
1742 bw_flags |= IEEE80211_CHAN_DISABLED;
1750 if (max_bandwidth_khz < MHZ_TO_KHZ(10))
1751 bw_flags |= IEEE80211_CHAN_NO_10MHZ;
1752 if (max_bandwidth_khz < MHZ_TO_KHZ(20))
1753 bw_flags |= IEEE80211_CHAN_NO_20MHZ;
1754 if (max_bandwidth_khz < MHZ_TO_KHZ(40))
1755 bw_flags |= IEEE80211_CHAN_NO_HT40;
1756 if (max_bandwidth_khz < MHZ_TO_KHZ(80))
1757 bw_flags |= IEEE80211_CHAN_NO_80MHZ;
1758 if (max_bandwidth_khz < MHZ_TO_KHZ(160))
1759 bw_flags |= IEEE80211_CHAN_NO_160MHZ;
1760 if (max_bandwidth_khz < MHZ_TO_KHZ(320))
1761 bw_flags |= IEEE80211_CHAN_NO_320MHZ;
1766 static void handle_channel_single_rule(struct wiphy *wiphy,
1767 enum nl80211_reg_initiator initiator,
1768 struct ieee80211_channel *chan,
1770 struct regulatory_request *lr,
1771 struct wiphy *request_wiphy,
1772 const struct ieee80211_reg_rule *reg_rule)
1775 const struct ieee80211_power_rule *power_rule = NULL;
1776 const struct ieee80211_regdomain *regd;
1778 regd = reg_get_regdomain(wiphy);
1780 power_rule = ®_rule->power_rule;
1781 bw_flags = reg_rule_to_chan_bw_flags(regd, reg_rule, chan);
1783 if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER &&
1784 request_wiphy && request_wiphy == wiphy &&
1785 request_wiphy->regulatory_flags & REGULATORY_STRICT_REG) {
1787 * This guarantees the driver's requested regulatory domain
1788 * will always be used as a base for further regulatory
1791 chan->flags = chan->orig_flags =
1792 map_regdom_flags(reg_rule->flags) | bw_flags;
1793 chan->max_antenna_gain = chan->orig_mag =
1794 (int) MBI_TO_DBI(power_rule->max_antenna_gain);
1795 chan->max_reg_power = chan->max_power = chan->orig_mpwr =
1796 (int) MBM_TO_DBM(power_rule->max_eirp);
1798 if (chan->flags & IEEE80211_CHAN_RADAR) {
1799 chan->dfs_cac_ms = IEEE80211_DFS_MIN_CAC_TIME_MS;
1800 if (reg_rule->dfs_cac_ms)
1801 chan->dfs_cac_ms = reg_rule->dfs_cac_ms;
1804 if (chan->flags & IEEE80211_CHAN_PSD)
1805 chan->psd = reg_rule->psd;
1810 chan->dfs_state = NL80211_DFS_USABLE;
1811 chan->dfs_state_entered = jiffies;
1813 chan->beacon_found = false;
1814 chan->flags = flags | bw_flags | map_regdom_flags(reg_rule->flags);
1815 chan->max_antenna_gain =
1816 min_t(int, chan->orig_mag,
1817 MBI_TO_DBI(power_rule->max_antenna_gain));
1818 chan->max_reg_power = (int) MBM_TO_DBM(power_rule->max_eirp);
1820 if (chan->flags & IEEE80211_CHAN_RADAR) {
1821 if (reg_rule->dfs_cac_ms)
1822 chan->dfs_cac_ms = reg_rule->dfs_cac_ms;
1824 chan->dfs_cac_ms = IEEE80211_DFS_MIN_CAC_TIME_MS;
1827 if (chan->flags & IEEE80211_CHAN_PSD)
1828 chan->psd = reg_rule->psd;
1830 if (chan->orig_mpwr) {
1832 * Devices that use REGULATORY_COUNTRY_IE_FOLLOW_POWER
1833 * will always follow the passed country IE power settings.
1835 if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE &&
1836 wiphy->regulatory_flags & REGULATORY_COUNTRY_IE_FOLLOW_POWER)
1837 chan->max_power = chan->max_reg_power;
1839 chan->max_power = min(chan->orig_mpwr,
1840 chan->max_reg_power);
1842 chan->max_power = chan->max_reg_power;
1845 static void handle_channel_adjacent_rules(struct wiphy *wiphy,
1846 enum nl80211_reg_initiator initiator,
1847 struct ieee80211_channel *chan,
1849 struct regulatory_request *lr,
1850 struct wiphy *request_wiphy,
1851 const struct ieee80211_reg_rule *rrule1,
1852 const struct ieee80211_reg_rule *rrule2,
1853 struct ieee80211_freq_range *comb_range)
1857 const struct ieee80211_power_rule *power_rule1 = NULL;
1858 const struct ieee80211_power_rule *power_rule2 = NULL;
1859 const struct ieee80211_regdomain *regd;
1861 regd = reg_get_regdomain(wiphy);
1863 power_rule1 = &rrule1->power_rule;
1864 power_rule2 = &rrule2->power_rule;
1865 bw_flags1 = reg_rule_to_chan_bw_flags(regd, rrule1, chan);
1866 bw_flags2 = reg_rule_to_chan_bw_flags(regd, rrule2, chan);
1868 if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER &&
1869 request_wiphy && request_wiphy == wiphy &&
1870 request_wiphy->regulatory_flags & REGULATORY_STRICT_REG) {
1871 /* This guarantees the driver's requested regulatory domain
1872 * will always be used as a base for further regulatory
1876 map_regdom_flags(rrule1->flags) |
1877 map_regdom_flags(rrule2->flags) |
1880 chan->orig_flags = chan->flags;
1881 chan->max_antenna_gain =
1882 min_t(int, MBI_TO_DBI(power_rule1->max_antenna_gain),
1883 MBI_TO_DBI(power_rule2->max_antenna_gain));
1884 chan->orig_mag = chan->max_antenna_gain;
1885 chan->max_reg_power =
1886 min_t(int, MBM_TO_DBM(power_rule1->max_eirp),
1887 MBM_TO_DBM(power_rule2->max_eirp));
1888 chan->max_power = chan->max_reg_power;
1889 chan->orig_mpwr = chan->max_reg_power;
1891 if (chan->flags & IEEE80211_CHAN_RADAR) {
1892 chan->dfs_cac_ms = IEEE80211_DFS_MIN_CAC_TIME_MS;
1893 if (rrule1->dfs_cac_ms || rrule2->dfs_cac_ms)
1894 chan->dfs_cac_ms = max_t(unsigned int,
1896 rrule2->dfs_cac_ms);
1899 if ((rrule1->flags & NL80211_RRF_PSD) &&
1900 (rrule2->flags & NL80211_RRF_PSD))
1901 chan->psd = min_t(s8, rrule1->psd, rrule2->psd);
1903 chan->flags &= ~NL80211_RRF_PSD;
1908 chan->dfs_state = NL80211_DFS_USABLE;
1909 chan->dfs_state_entered = jiffies;
1911 chan->beacon_found = false;
1912 chan->flags = flags | bw_flags1 | bw_flags2 |
1913 map_regdom_flags(rrule1->flags) |
1914 map_regdom_flags(rrule2->flags);
1916 /* reg_rule_to_chan_bw_flags may forbids 10 and forbids 20 MHz
1917 * (otherwise no adj. rule case), recheck therefore
1919 if (cfg80211_does_bw_fit_range(comb_range,
1920 ieee80211_channel_to_khz(chan),
1922 chan->flags &= ~IEEE80211_CHAN_NO_10MHZ;
1923 if (cfg80211_does_bw_fit_range(comb_range,
1924 ieee80211_channel_to_khz(chan),
1926 chan->flags &= ~IEEE80211_CHAN_NO_20MHZ;
1928 chan->max_antenna_gain =
1929 min_t(int, chan->orig_mag,
1931 MBI_TO_DBI(power_rule1->max_antenna_gain),
1932 MBI_TO_DBI(power_rule2->max_antenna_gain)));
1933 chan->max_reg_power = min_t(int,
1934 MBM_TO_DBM(power_rule1->max_eirp),
1935 MBM_TO_DBM(power_rule2->max_eirp));
1937 if (chan->flags & IEEE80211_CHAN_RADAR) {
1938 if (rrule1->dfs_cac_ms || rrule2->dfs_cac_ms)
1939 chan->dfs_cac_ms = max_t(unsigned int,
1941 rrule2->dfs_cac_ms);
1943 chan->dfs_cac_ms = IEEE80211_DFS_MIN_CAC_TIME_MS;
1946 if (chan->orig_mpwr) {
1947 /* Devices that use REGULATORY_COUNTRY_IE_FOLLOW_POWER
1948 * will always follow the passed country IE power settings.
1950 if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE &&
1951 wiphy->regulatory_flags & REGULATORY_COUNTRY_IE_FOLLOW_POWER)
1952 chan->max_power = chan->max_reg_power;
1954 chan->max_power = min(chan->orig_mpwr,
1955 chan->max_reg_power);
1957 chan->max_power = chan->max_reg_power;
1961 /* Note that right now we assume the desired channel bandwidth
1962 * is always 20 MHz for each individual channel (HT40 uses 20 MHz
1963 * per channel, the primary and the extension channel).
1965 static void handle_channel(struct wiphy *wiphy,
1966 enum nl80211_reg_initiator initiator,
1967 struct ieee80211_channel *chan)
1969 const u32 orig_chan_freq = ieee80211_channel_to_khz(chan);
1970 struct regulatory_request *lr = get_last_request();
1971 struct wiphy *request_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx);
1972 const struct ieee80211_reg_rule *rrule = NULL;
1973 const struct ieee80211_reg_rule *rrule1 = NULL;
1974 const struct ieee80211_reg_rule *rrule2 = NULL;
1976 u32 flags = chan->orig_flags;
1978 rrule = freq_reg_info(wiphy, orig_chan_freq);
1979 if (IS_ERR(rrule)) {
1980 /* check for adjacent match, therefore get rules for
1981 * chan - 20 MHz and chan + 20 MHz and test
1982 * if reg rules are adjacent
1984 rrule1 = freq_reg_info(wiphy,
1985 orig_chan_freq - MHZ_TO_KHZ(20));
1986 rrule2 = freq_reg_info(wiphy,
1987 orig_chan_freq + MHZ_TO_KHZ(20));
1988 if (!IS_ERR(rrule1) && !IS_ERR(rrule2)) {
1989 struct ieee80211_freq_range comb_range;
1991 if (rrule1->freq_range.end_freq_khz !=
1992 rrule2->freq_range.start_freq_khz)
1995 comb_range.start_freq_khz =
1996 rrule1->freq_range.start_freq_khz;
1997 comb_range.end_freq_khz =
1998 rrule2->freq_range.end_freq_khz;
1999 comb_range.max_bandwidth_khz =
2001 rrule1->freq_range.max_bandwidth_khz,
2002 rrule2->freq_range.max_bandwidth_khz);
2004 if (!cfg80211_does_bw_fit_range(&comb_range,
2009 handle_channel_adjacent_rules(wiphy, initiator, chan,
2010 flags, lr, request_wiphy,
2017 /* We will disable all channels that do not match our
2018 * received regulatory rule unless the hint is coming
2019 * from a Country IE and the Country IE had no information
2020 * about a band. The IEEE 802.11 spec allows for an AP
2021 * to send only a subset of the regulatory rules allowed,
2022 * so an AP in the US that only supports 2.4 GHz may only send
2023 * a country IE with information for the 2.4 GHz band
2024 * while 5 GHz is still supported.
2026 if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE &&
2027 PTR_ERR(rrule) == -ERANGE)
2030 if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER &&
2031 request_wiphy && request_wiphy == wiphy &&
2032 request_wiphy->regulatory_flags & REGULATORY_STRICT_REG) {
2033 pr_debug("Disabling freq %d.%03d MHz for good\n",
2034 chan->center_freq, chan->freq_offset);
2035 chan->orig_flags |= IEEE80211_CHAN_DISABLED;
2036 chan->flags = chan->orig_flags;
2038 pr_debug("Disabling freq %d.%03d MHz\n",
2039 chan->center_freq, chan->freq_offset);
2040 chan->flags |= IEEE80211_CHAN_DISABLED;
2045 handle_channel_single_rule(wiphy, initiator, chan, flags, lr,
2046 request_wiphy, rrule);
2049 static void handle_band(struct wiphy *wiphy,
2050 enum nl80211_reg_initiator initiator,
2051 struct ieee80211_supported_band *sband)
2058 for (i = 0; i < sband->n_channels; i++)
2059 handle_channel(wiphy, initiator, &sband->channels[i]);
2062 static bool reg_request_cell_base(struct regulatory_request *request)
2064 if (request->initiator != NL80211_REGDOM_SET_BY_USER)
2066 return request->user_reg_hint_type == NL80211_USER_REG_HINT_CELL_BASE;
2069 bool reg_last_request_cell_base(void)
2071 return reg_request_cell_base(get_last_request());
2074 #ifdef CONFIG_CFG80211_REG_CELLULAR_HINTS
2075 /* Core specific check */
2076 static enum reg_request_treatment
2077 reg_ignore_cell_hint(struct regulatory_request *pending_request)
2079 struct regulatory_request *lr = get_last_request();
2081 if (!reg_num_devs_support_basehint)
2082 return REG_REQ_IGNORE;
2084 if (reg_request_cell_base(lr) &&
2085 !regdom_changes(pending_request->alpha2))
2086 return REG_REQ_ALREADY_SET;
2091 /* Device specific check */
2092 static bool reg_dev_ignore_cell_hint(struct wiphy *wiphy)
2094 return !(wiphy->features & NL80211_FEATURE_CELL_BASE_REG_HINTS);
2097 static enum reg_request_treatment
2098 reg_ignore_cell_hint(struct regulatory_request *pending_request)
2100 return REG_REQ_IGNORE;
2103 static bool reg_dev_ignore_cell_hint(struct wiphy *wiphy)
2109 static bool wiphy_strict_alpha2_regd(struct wiphy *wiphy)
2111 if (wiphy->regulatory_flags & REGULATORY_STRICT_REG &&
2112 !(wiphy->regulatory_flags & REGULATORY_CUSTOM_REG))
2117 static bool ignore_reg_update(struct wiphy *wiphy,
2118 enum nl80211_reg_initiator initiator)
2120 struct regulatory_request *lr = get_last_request();
2122 if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED)
2126 pr_debug("Ignoring regulatory request set by %s since last_request is not set\n",
2127 reg_initiator_name(initiator));
2131 if (initiator == NL80211_REGDOM_SET_BY_CORE &&
2132 wiphy->regulatory_flags & REGULATORY_CUSTOM_REG) {
2133 pr_debug("Ignoring regulatory request set by %s since the driver uses its own custom regulatory domain\n",
2134 reg_initiator_name(initiator));
2139 * wiphy->regd will be set once the device has its own
2140 * desired regulatory domain set
2142 if (wiphy_strict_alpha2_regd(wiphy) && !wiphy->regd &&
2143 initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE &&
2144 !is_world_regdom(lr->alpha2)) {
2145 pr_debug("Ignoring regulatory request set by %s since the driver requires its own regulatory domain to be set first\n",
2146 reg_initiator_name(initiator));
2150 if (reg_request_cell_base(lr))
2151 return reg_dev_ignore_cell_hint(wiphy);
2156 static bool reg_is_world_roaming(struct wiphy *wiphy)
2158 const struct ieee80211_regdomain *cr = get_cfg80211_regdom();
2159 const struct ieee80211_regdomain *wr = get_wiphy_regdom(wiphy);
2160 struct regulatory_request *lr = get_last_request();
2162 if (is_world_regdom(cr->alpha2) || (wr && is_world_regdom(wr->alpha2)))
2165 if (lr && lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE &&
2166 wiphy->regulatory_flags & REGULATORY_CUSTOM_REG)
2172 static void reg_call_notifier(struct wiphy *wiphy,
2173 struct regulatory_request *request)
2175 if (wiphy->reg_notifier)
2176 wiphy->reg_notifier(wiphy, request);
2179 static void handle_reg_beacon(struct wiphy *wiphy, unsigned int chan_idx,
2180 struct reg_beacon *reg_beacon)
2182 struct ieee80211_supported_band *sband;
2183 struct ieee80211_channel *chan;
2184 bool channel_changed = false;
2185 struct ieee80211_channel chan_before;
2186 struct regulatory_request *lr = get_last_request();
2188 sband = wiphy->bands[reg_beacon->chan.band];
2189 chan = &sband->channels[chan_idx];
2191 if (likely(!ieee80211_channel_equal(chan, ®_beacon->chan)))
2194 if (chan->beacon_found)
2197 chan->beacon_found = true;
2199 if (!reg_is_world_roaming(wiphy))
2202 if (wiphy->regulatory_flags & REGULATORY_DISABLE_BEACON_HINTS)
2205 chan_before = *chan;
2207 if (chan->flags & IEEE80211_CHAN_NO_IR) {
2208 chan->flags &= ~IEEE80211_CHAN_NO_IR;
2209 channel_changed = true;
2212 if (channel_changed) {
2213 nl80211_send_beacon_hint_event(wiphy, &chan_before, chan);
2214 if (wiphy->flags & WIPHY_FLAG_CHANNEL_CHANGE_ON_BEACON)
2215 reg_call_notifier(wiphy, lr);
2220 * Called when a scan on a wiphy finds a beacon on
2223 static void wiphy_update_new_beacon(struct wiphy *wiphy,
2224 struct reg_beacon *reg_beacon)
2227 struct ieee80211_supported_band *sband;
2229 if (!wiphy->bands[reg_beacon->chan.band])
2232 sband = wiphy->bands[reg_beacon->chan.band];
2234 for (i = 0; i < sband->n_channels; i++)
2235 handle_reg_beacon(wiphy, i, reg_beacon);
2239 * Called upon reg changes or a new wiphy is added
2241 static void wiphy_update_beacon_reg(struct wiphy *wiphy)
2244 struct ieee80211_supported_band *sband;
2245 struct reg_beacon *reg_beacon;
2247 list_for_each_entry(reg_beacon, ®_beacon_list, list) {
2248 if (!wiphy->bands[reg_beacon->chan.band])
2250 sband = wiphy->bands[reg_beacon->chan.band];
2251 for (i = 0; i < sband->n_channels; i++)
2252 handle_reg_beacon(wiphy, i, reg_beacon);
2256 /* Reap the advantages of previously found beacons */
2257 static void reg_process_beacons(struct wiphy *wiphy)
2260 * Means we are just firing up cfg80211, so no beacons would
2261 * have been processed yet.
2265 wiphy_update_beacon_reg(wiphy);
2268 static bool is_ht40_allowed(struct ieee80211_channel *chan)
2272 if (chan->flags & IEEE80211_CHAN_DISABLED)
2274 /* This would happen when regulatory rules disallow HT40 completely */
2275 if ((chan->flags & IEEE80211_CHAN_NO_HT40) == IEEE80211_CHAN_NO_HT40)
2280 static void reg_process_ht_flags_channel(struct wiphy *wiphy,
2281 struct ieee80211_channel *channel)
2283 struct ieee80211_supported_band *sband = wiphy->bands[channel->band];
2284 struct ieee80211_channel *channel_before = NULL, *channel_after = NULL;
2285 const struct ieee80211_regdomain *regd;
2289 if (!is_ht40_allowed(channel)) {
2290 channel->flags |= IEEE80211_CHAN_NO_HT40;
2295 * We need to ensure the extension channels exist to
2296 * be able to use HT40- or HT40+, this finds them (or not)
2298 for (i = 0; i < sband->n_channels; i++) {
2299 struct ieee80211_channel *c = &sband->channels[i];
2301 if (c->center_freq == (channel->center_freq - 20))
2303 if (c->center_freq == (channel->center_freq + 20))
2308 regd = get_wiphy_regdom(wiphy);
2310 const struct ieee80211_reg_rule *reg_rule =
2311 freq_reg_info_regd(MHZ_TO_KHZ(channel->center_freq),
2312 regd, MHZ_TO_KHZ(20));
2314 if (!IS_ERR(reg_rule))
2315 flags = reg_rule->flags;
2319 * Please note that this assumes target bandwidth is 20 MHz,
2320 * if that ever changes we also need to change the below logic
2321 * to include that as well.
2323 if (!is_ht40_allowed(channel_before) ||
2324 flags & NL80211_RRF_NO_HT40MINUS)
2325 channel->flags |= IEEE80211_CHAN_NO_HT40MINUS;
2327 channel->flags &= ~IEEE80211_CHAN_NO_HT40MINUS;
2329 if (!is_ht40_allowed(channel_after) ||
2330 flags & NL80211_RRF_NO_HT40PLUS)
2331 channel->flags |= IEEE80211_CHAN_NO_HT40PLUS;
2333 channel->flags &= ~IEEE80211_CHAN_NO_HT40PLUS;
2336 static void reg_process_ht_flags_band(struct wiphy *wiphy,
2337 struct ieee80211_supported_band *sband)
2344 for (i = 0; i < sband->n_channels; i++)
2345 reg_process_ht_flags_channel(wiphy, &sband->channels[i]);
2348 static void reg_process_ht_flags(struct wiphy *wiphy)
2350 enum nl80211_band band;
2355 for (band = 0; band < NUM_NL80211_BANDS; band++)
2356 reg_process_ht_flags_band(wiphy, wiphy->bands[band]);
2359 static bool reg_wdev_chan_valid(struct wiphy *wiphy, struct wireless_dev *wdev)
2361 struct cfg80211_chan_def chandef = {};
2362 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
2363 enum nl80211_iftype iftype;
2367 iftype = wdev->iftype;
2369 /* make sure the interface is active */
2370 if (!wdev->netdev || !netif_running(wdev->netdev))
2373 for (link = 0; link < ARRAY_SIZE(wdev->links); link++) {
2374 struct ieee80211_channel *chan;
2376 if (!wdev->valid_links && link > 0)
2378 if (wdev->valid_links && !(wdev->valid_links & BIT(link)))
2381 case NL80211_IFTYPE_AP:
2382 case NL80211_IFTYPE_P2P_GO:
2383 if (!wdev->links[link].ap.beacon_interval)
2385 chandef = wdev->links[link].ap.chandef;
2387 case NL80211_IFTYPE_MESH_POINT:
2388 if (!wdev->u.mesh.beacon_interval)
2390 chandef = wdev->u.mesh.chandef;
2392 case NL80211_IFTYPE_ADHOC:
2393 if (!wdev->u.ibss.ssid_len)
2395 chandef = wdev->u.ibss.chandef;
2397 case NL80211_IFTYPE_STATION:
2398 case NL80211_IFTYPE_P2P_CLIENT:
2399 /* Maybe we could consider disabling that link only? */
2400 if (!wdev->links[link].client.current_bss)
2403 chan = wdev->links[link].client.current_bss->pub.channel;
2407 if (!rdev->ops->get_channel ||
2408 rdev_get_channel(rdev, wdev, link, &chandef))
2409 cfg80211_chandef_create(&chandef, chan,
2410 NL80211_CHAN_NO_HT);
2412 case NL80211_IFTYPE_MONITOR:
2413 case NL80211_IFTYPE_AP_VLAN:
2414 case NL80211_IFTYPE_P2P_DEVICE:
2415 /* no enforcement required */
2417 case NL80211_IFTYPE_OCB:
2418 if (!wdev->u.ocb.chandef.chan)
2420 chandef = wdev->u.ocb.chandef;
2422 case NL80211_IFTYPE_NAN:
2423 /* we have no info, but NAN is also pretty universal */
2426 /* others not implemented for now */
2432 case NL80211_IFTYPE_AP:
2433 case NL80211_IFTYPE_P2P_GO:
2434 case NL80211_IFTYPE_ADHOC:
2435 case NL80211_IFTYPE_MESH_POINT:
2436 ret = cfg80211_reg_can_beacon_relax(wiphy, &chandef,
2441 case NL80211_IFTYPE_STATION:
2442 case NL80211_IFTYPE_P2P_CLIENT:
2443 ret = cfg80211_chandef_usable(wiphy, &chandef,
2444 IEEE80211_CHAN_DISABLED);
2456 static void reg_leave_invalid_chans(struct wiphy *wiphy)
2458 struct wireless_dev *wdev;
2459 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
2462 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list)
2463 if (!reg_wdev_chan_valid(wiphy, wdev))
2464 cfg80211_leave(rdev, wdev);
2465 wiphy_unlock(wiphy);
2468 static void reg_check_chans_work(struct work_struct *work)
2470 struct cfg80211_registered_device *rdev;
2472 pr_debug("Verifying active interfaces after reg change\n");
2476 reg_leave_invalid_chans(&rdev->wiphy);
2481 static void reg_check_channels(void)
2484 * Give usermode a chance to do something nicer (move to another
2485 * channel, orderly disconnection), before forcing a disconnection.
2487 mod_delayed_work(system_power_efficient_wq,
2489 msecs_to_jiffies(REG_ENFORCE_GRACE_MS));
2492 static void wiphy_update_regulatory(struct wiphy *wiphy,
2493 enum nl80211_reg_initiator initiator)
2495 enum nl80211_band band;
2496 struct regulatory_request *lr = get_last_request();
2498 if (ignore_reg_update(wiphy, initiator)) {
2500 * Regulatory updates set by CORE are ignored for custom
2501 * regulatory cards. Let us notify the changes to the driver,
2502 * as some drivers used this to restore its orig_* reg domain.
2504 if (initiator == NL80211_REGDOM_SET_BY_CORE &&
2505 wiphy->regulatory_flags & REGULATORY_CUSTOM_REG &&
2506 !(wiphy->regulatory_flags &
2507 REGULATORY_WIPHY_SELF_MANAGED))
2508 reg_call_notifier(wiphy, lr);
2512 lr->dfs_region = get_cfg80211_regdom()->dfs_region;
2514 for (band = 0; band < NUM_NL80211_BANDS; band++)
2515 handle_band(wiphy, initiator, wiphy->bands[band]);
2517 reg_process_beacons(wiphy);
2518 reg_process_ht_flags(wiphy);
2519 reg_call_notifier(wiphy, lr);
2522 static void update_all_wiphy_regulatory(enum nl80211_reg_initiator initiator)
2524 struct cfg80211_registered_device *rdev;
2525 struct wiphy *wiphy;
2529 for_each_rdev(rdev) {
2530 wiphy = &rdev->wiphy;
2531 wiphy_update_regulatory(wiphy, initiator);
2534 reg_check_channels();
2537 static void handle_channel_custom(struct wiphy *wiphy,
2538 struct ieee80211_channel *chan,
2539 const struct ieee80211_regdomain *regd,
2543 const struct ieee80211_reg_rule *reg_rule = NULL;
2544 const struct ieee80211_power_rule *power_rule = NULL;
2545 u32 bw, center_freq_khz;
2547 center_freq_khz = ieee80211_channel_to_khz(chan);
2548 for (bw = MHZ_TO_KHZ(20); bw >= min_bw; bw = bw / 2) {
2549 reg_rule = freq_reg_info_regd(center_freq_khz, regd, bw);
2550 if (!IS_ERR(reg_rule))
2554 if (IS_ERR_OR_NULL(reg_rule)) {
2555 pr_debug("Disabling freq %d.%03d MHz as custom regd has no rule that fits it\n",
2556 chan->center_freq, chan->freq_offset);
2557 if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) {
2558 chan->flags |= IEEE80211_CHAN_DISABLED;
2560 chan->orig_flags |= IEEE80211_CHAN_DISABLED;
2561 chan->flags = chan->orig_flags;
2566 power_rule = ®_rule->power_rule;
2567 bw_flags = reg_rule_to_chan_bw_flags(regd, reg_rule, chan);
2569 chan->dfs_state_entered = jiffies;
2570 chan->dfs_state = NL80211_DFS_USABLE;
2572 chan->beacon_found = false;
2574 if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED)
2575 chan->flags = chan->orig_flags | bw_flags |
2576 map_regdom_flags(reg_rule->flags);
2578 chan->flags |= map_regdom_flags(reg_rule->flags) | bw_flags;
2580 chan->max_antenna_gain = (int) MBI_TO_DBI(power_rule->max_antenna_gain);
2581 chan->max_reg_power = chan->max_power =
2582 (int) MBM_TO_DBM(power_rule->max_eirp);
2584 if (chan->flags & IEEE80211_CHAN_RADAR) {
2585 if (reg_rule->dfs_cac_ms)
2586 chan->dfs_cac_ms = reg_rule->dfs_cac_ms;
2588 chan->dfs_cac_ms = IEEE80211_DFS_MIN_CAC_TIME_MS;
2591 if (chan->flags & IEEE80211_CHAN_PSD)
2592 chan->psd = reg_rule->psd;
2594 chan->max_power = chan->max_reg_power;
2597 static void handle_band_custom(struct wiphy *wiphy,
2598 struct ieee80211_supported_band *sband,
2599 const struct ieee80211_regdomain *regd)
2607 * We currently assume that you always want at least 20 MHz,
2608 * otherwise channel 12 might get enabled if this rule is
2609 * compatible to US, which permits 2402 - 2472 MHz.
2611 for (i = 0; i < sband->n_channels; i++)
2612 handle_channel_custom(wiphy, &sband->channels[i], regd,
2616 /* Used by drivers prior to wiphy registration */
2617 void wiphy_apply_custom_regulatory(struct wiphy *wiphy,
2618 const struct ieee80211_regdomain *regd)
2620 const struct ieee80211_regdomain *new_regd, *tmp;
2621 enum nl80211_band band;
2622 unsigned int bands_set = 0;
2624 WARN(!(wiphy->regulatory_flags & REGULATORY_CUSTOM_REG),
2625 "wiphy should have REGULATORY_CUSTOM_REG\n");
2626 wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG;
2628 for (band = 0; band < NUM_NL80211_BANDS; band++) {
2629 if (!wiphy->bands[band])
2631 handle_band_custom(wiphy, wiphy->bands[band], regd);
2636 * no point in calling this if it won't have any effect
2637 * on your device's supported bands.
2639 WARN_ON(!bands_set);
2640 new_regd = reg_copy_regd(regd);
2641 if (IS_ERR(new_regd))
2647 tmp = get_wiphy_regdom(wiphy);
2648 rcu_assign_pointer(wiphy->regd, new_regd);
2649 rcu_free_regdom(tmp);
2651 wiphy_unlock(wiphy);
2654 EXPORT_SYMBOL(wiphy_apply_custom_regulatory);
2656 static void reg_set_request_processed(void)
2658 bool need_more_processing = false;
2659 struct regulatory_request *lr = get_last_request();
2661 lr->processed = true;
2663 spin_lock(®_requests_lock);
2664 if (!list_empty(®_requests_list))
2665 need_more_processing = true;
2666 spin_unlock(®_requests_lock);
2668 cancel_crda_timeout();
2670 if (need_more_processing)
2671 schedule_work(®_work);
2675 * reg_process_hint_core - process core regulatory requests
2676 * @core_request: a pending core regulatory request
2678 * The wireless subsystem can use this function to process
2679 * a regulatory request issued by the regulatory core.
2681 * Returns: %REG_REQ_OK or %REG_REQ_IGNORE, indicating if the
2682 * hint was processed or ignored
2684 static enum reg_request_treatment
2685 reg_process_hint_core(struct regulatory_request *core_request)
2687 if (reg_query_database(core_request)) {
2688 core_request->intersect = false;
2689 core_request->processed = false;
2690 reg_update_last_request(core_request);
2694 return REG_REQ_IGNORE;
2697 static enum reg_request_treatment
2698 __reg_process_hint_user(struct regulatory_request *user_request)
2700 struct regulatory_request *lr = get_last_request();
2702 if (reg_request_cell_base(user_request))
2703 return reg_ignore_cell_hint(user_request);
2705 if (reg_request_cell_base(lr))
2706 return REG_REQ_IGNORE;
2708 if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE)
2709 return REG_REQ_INTERSECT;
2711 * If the user knows better the user should set the regdom
2712 * to their country before the IE is picked up
2714 if (lr->initiator == NL80211_REGDOM_SET_BY_USER &&
2716 return REG_REQ_IGNORE;
2718 * Process user requests only after previous user/driver/core
2719 * requests have been processed
2721 if ((lr->initiator == NL80211_REGDOM_SET_BY_CORE ||
2722 lr->initiator == NL80211_REGDOM_SET_BY_DRIVER ||
2723 lr->initiator == NL80211_REGDOM_SET_BY_USER) &&
2724 regdom_changes(lr->alpha2))
2725 return REG_REQ_IGNORE;
2727 if (!regdom_changes(user_request->alpha2))
2728 return REG_REQ_ALREADY_SET;
2734 * reg_process_hint_user - process user regulatory requests
2735 * @user_request: a pending user regulatory request
2737 * The wireless subsystem can use this function to process
2738 * a regulatory request initiated by userspace.
2740 * Returns: %REG_REQ_OK or %REG_REQ_IGNORE, indicating if the
2741 * hint was processed or ignored
2743 static enum reg_request_treatment
2744 reg_process_hint_user(struct regulatory_request *user_request)
2746 enum reg_request_treatment treatment;
2748 treatment = __reg_process_hint_user(user_request);
2749 if (treatment == REG_REQ_IGNORE ||
2750 treatment == REG_REQ_ALREADY_SET)
2751 return REG_REQ_IGNORE;
2753 user_request->intersect = treatment == REG_REQ_INTERSECT;
2754 user_request->processed = false;
2756 if (reg_query_database(user_request)) {
2757 reg_update_last_request(user_request);
2758 user_alpha2[0] = user_request->alpha2[0];
2759 user_alpha2[1] = user_request->alpha2[1];
2763 return REG_REQ_IGNORE;
2766 static enum reg_request_treatment
2767 __reg_process_hint_driver(struct regulatory_request *driver_request)
2769 struct regulatory_request *lr = get_last_request();
2771 if (lr->initiator == NL80211_REGDOM_SET_BY_CORE) {
2772 if (regdom_changes(driver_request->alpha2))
2774 return REG_REQ_ALREADY_SET;
2778 * This would happen if you unplug and plug your card
2779 * back in or if you add a new device for which the previously
2780 * loaded card also agrees on the regulatory domain.
2782 if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER &&
2783 !regdom_changes(driver_request->alpha2))
2784 return REG_REQ_ALREADY_SET;
2786 return REG_REQ_INTERSECT;
2790 * reg_process_hint_driver - process driver regulatory requests
2791 * @wiphy: the wireless device for the regulatory request
2792 * @driver_request: a pending driver regulatory request
2794 * The wireless subsystem can use this function to process
2795 * a regulatory request issued by an 802.11 driver.
2797 * Returns: one of the different reg request treatment values.
2799 static enum reg_request_treatment
2800 reg_process_hint_driver(struct wiphy *wiphy,
2801 struct regulatory_request *driver_request)
2803 const struct ieee80211_regdomain *regd, *tmp;
2804 enum reg_request_treatment treatment;
2806 treatment = __reg_process_hint_driver(driver_request);
2808 switch (treatment) {
2811 case REG_REQ_IGNORE:
2812 return REG_REQ_IGNORE;
2813 case REG_REQ_INTERSECT:
2814 case REG_REQ_ALREADY_SET:
2815 regd = reg_copy_regd(get_cfg80211_regdom());
2817 return REG_REQ_IGNORE;
2819 tmp = get_wiphy_regdom(wiphy);
2822 rcu_assign_pointer(wiphy->regd, regd);
2823 wiphy_unlock(wiphy);
2824 rcu_free_regdom(tmp);
2828 driver_request->intersect = treatment == REG_REQ_INTERSECT;
2829 driver_request->processed = false;
2832 * Since CRDA will not be called in this case as we already
2833 * have applied the requested regulatory domain before we just
2834 * inform userspace we have processed the request
2836 if (treatment == REG_REQ_ALREADY_SET) {
2837 nl80211_send_reg_change_event(driver_request);
2838 reg_update_last_request(driver_request);
2839 reg_set_request_processed();
2840 return REG_REQ_ALREADY_SET;
2843 if (reg_query_database(driver_request)) {
2844 reg_update_last_request(driver_request);
2848 return REG_REQ_IGNORE;
2851 static enum reg_request_treatment
2852 __reg_process_hint_country_ie(struct wiphy *wiphy,
2853 struct regulatory_request *country_ie_request)
2855 struct wiphy *last_wiphy = NULL;
2856 struct regulatory_request *lr = get_last_request();
2858 if (reg_request_cell_base(lr)) {
2859 /* Trust a Cell base station over the AP's country IE */
2860 if (regdom_changes(country_ie_request->alpha2))
2861 return REG_REQ_IGNORE;
2862 return REG_REQ_ALREADY_SET;
2864 if (wiphy->regulatory_flags & REGULATORY_COUNTRY_IE_IGNORE)
2865 return REG_REQ_IGNORE;
2868 if (unlikely(!is_an_alpha2(country_ie_request->alpha2)))
2871 if (lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE)
2874 last_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx);
2876 if (last_wiphy != wiphy) {
2878 * Two cards with two APs claiming different
2879 * Country IE alpha2s. We could
2880 * intersect them, but that seems unlikely
2881 * to be correct. Reject second one for now.
2883 if (regdom_changes(country_ie_request->alpha2))
2884 return REG_REQ_IGNORE;
2885 return REG_REQ_ALREADY_SET;
2888 if (regdom_changes(country_ie_request->alpha2))
2890 return REG_REQ_ALREADY_SET;
2894 * reg_process_hint_country_ie - process regulatory requests from country IEs
2895 * @wiphy: the wireless device for the regulatory request
2896 * @country_ie_request: a regulatory request from a country IE
2898 * The wireless subsystem can use this function to process
2899 * a regulatory request issued by a country Information Element.
2901 * Returns: one of the different reg request treatment values.
2903 static enum reg_request_treatment
2904 reg_process_hint_country_ie(struct wiphy *wiphy,
2905 struct regulatory_request *country_ie_request)
2907 enum reg_request_treatment treatment;
2909 treatment = __reg_process_hint_country_ie(wiphy, country_ie_request);
2911 switch (treatment) {
2914 case REG_REQ_IGNORE:
2915 return REG_REQ_IGNORE;
2916 case REG_REQ_ALREADY_SET:
2917 reg_free_request(country_ie_request);
2918 return REG_REQ_ALREADY_SET;
2919 case REG_REQ_INTERSECT:
2921 * This doesn't happen yet, not sure we
2922 * ever want to support it for this case.
2924 WARN_ONCE(1, "Unexpected intersection for country elements");
2925 return REG_REQ_IGNORE;
2928 country_ie_request->intersect = false;
2929 country_ie_request->processed = false;
2931 if (reg_query_database(country_ie_request)) {
2932 reg_update_last_request(country_ie_request);
2936 return REG_REQ_IGNORE;
2939 bool reg_dfs_domain_same(struct wiphy *wiphy1, struct wiphy *wiphy2)
2941 const struct ieee80211_regdomain *wiphy1_regd = NULL;
2942 const struct ieee80211_regdomain *wiphy2_regd = NULL;
2943 const struct ieee80211_regdomain *cfg80211_regd = NULL;
2944 bool dfs_domain_same;
2948 cfg80211_regd = rcu_dereference(cfg80211_regdomain);
2949 wiphy1_regd = rcu_dereference(wiphy1->regd);
2951 wiphy1_regd = cfg80211_regd;
2953 wiphy2_regd = rcu_dereference(wiphy2->regd);
2955 wiphy2_regd = cfg80211_regd;
2957 dfs_domain_same = wiphy1_regd->dfs_region == wiphy2_regd->dfs_region;
2961 return dfs_domain_same;
2964 static void reg_copy_dfs_chan_state(struct ieee80211_channel *dst_chan,
2965 struct ieee80211_channel *src_chan)
2967 if (!(dst_chan->flags & IEEE80211_CHAN_RADAR) ||
2968 !(src_chan->flags & IEEE80211_CHAN_RADAR))
2971 if (dst_chan->flags & IEEE80211_CHAN_DISABLED ||
2972 src_chan->flags & IEEE80211_CHAN_DISABLED)
2975 if (src_chan->center_freq == dst_chan->center_freq &&
2976 dst_chan->dfs_state == NL80211_DFS_USABLE) {
2977 dst_chan->dfs_state = src_chan->dfs_state;
2978 dst_chan->dfs_state_entered = src_chan->dfs_state_entered;
2982 static void wiphy_share_dfs_chan_state(struct wiphy *dst_wiphy,
2983 struct wiphy *src_wiphy)
2985 struct ieee80211_supported_band *src_sband, *dst_sband;
2986 struct ieee80211_channel *src_chan, *dst_chan;
2989 if (!reg_dfs_domain_same(dst_wiphy, src_wiphy))
2992 for (band = 0; band < NUM_NL80211_BANDS; band++) {
2993 dst_sband = dst_wiphy->bands[band];
2994 src_sband = src_wiphy->bands[band];
2995 if (!dst_sband || !src_sband)
2998 for (i = 0; i < dst_sband->n_channels; i++) {
2999 dst_chan = &dst_sband->channels[i];
3000 for (j = 0; j < src_sband->n_channels; j++) {
3001 src_chan = &src_sband->channels[j];
3002 reg_copy_dfs_chan_state(dst_chan, src_chan);
3008 static void wiphy_all_share_dfs_chan_state(struct wiphy *wiphy)
3010 struct cfg80211_registered_device *rdev;
3014 for_each_rdev(rdev) {
3015 if (wiphy == &rdev->wiphy)
3017 wiphy_share_dfs_chan_state(wiphy, &rdev->wiphy);
3021 /* This processes *all* regulatory hints */
3022 static void reg_process_hint(struct regulatory_request *reg_request)
3024 struct wiphy *wiphy = NULL;
3025 enum reg_request_treatment treatment;
3026 enum nl80211_reg_initiator initiator = reg_request->initiator;
3028 if (reg_request->wiphy_idx != WIPHY_IDX_INVALID)
3029 wiphy = wiphy_idx_to_wiphy(reg_request->wiphy_idx);
3031 switch (initiator) {
3032 case NL80211_REGDOM_SET_BY_CORE:
3033 treatment = reg_process_hint_core(reg_request);
3035 case NL80211_REGDOM_SET_BY_USER:
3036 treatment = reg_process_hint_user(reg_request);
3038 case NL80211_REGDOM_SET_BY_DRIVER:
3041 treatment = reg_process_hint_driver(wiphy, reg_request);
3043 case NL80211_REGDOM_SET_BY_COUNTRY_IE:
3046 treatment = reg_process_hint_country_ie(wiphy, reg_request);
3049 WARN(1, "invalid initiator %d\n", initiator);
3053 if (treatment == REG_REQ_IGNORE)
3056 WARN(treatment != REG_REQ_OK && treatment != REG_REQ_ALREADY_SET,
3057 "unexpected treatment value %d\n", treatment);
3059 /* This is required so that the orig_* parameters are saved.
3060 * NOTE: treatment must be set for any case that reaches here!
3062 if (treatment == REG_REQ_ALREADY_SET && wiphy &&
3063 wiphy->regulatory_flags & REGULATORY_STRICT_REG) {
3064 wiphy_update_regulatory(wiphy, initiator);
3065 wiphy_all_share_dfs_chan_state(wiphy);
3066 reg_check_channels();
3072 reg_free_request(reg_request);
3075 static void notify_self_managed_wiphys(struct regulatory_request *request)
3077 struct cfg80211_registered_device *rdev;
3078 struct wiphy *wiphy;
3080 for_each_rdev(rdev) {
3081 wiphy = &rdev->wiphy;
3082 if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED &&
3083 request->initiator == NL80211_REGDOM_SET_BY_USER)
3084 reg_call_notifier(wiphy, request);
3089 * Processes regulatory hints, this is all the NL80211_REGDOM_SET_BY_*
3090 * Regulatory hints come on a first come first serve basis and we
3091 * must process each one atomically.
3093 static void reg_process_pending_hints(void)
3095 struct regulatory_request *reg_request, *lr;
3097 lr = get_last_request();
3099 /* When last_request->processed becomes true this will be rescheduled */
3100 if (lr && !lr->processed) {
3101 pr_debug("Pending regulatory request, waiting for it to be processed...\n");
3105 spin_lock(®_requests_lock);
3107 if (list_empty(®_requests_list)) {
3108 spin_unlock(®_requests_lock);
3112 reg_request = list_first_entry(®_requests_list,
3113 struct regulatory_request,
3115 list_del_init(®_request->list);
3117 spin_unlock(®_requests_lock);
3119 notify_self_managed_wiphys(reg_request);
3121 reg_process_hint(reg_request);
3123 lr = get_last_request();
3125 spin_lock(®_requests_lock);
3126 if (!list_empty(®_requests_list) && lr && lr->processed)
3127 schedule_work(®_work);
3128 spin_unlock(®_requests_lock);
3131 /* Processes beacon hints -- this has nothing to do with country IEs */
3132 static void reg_process_pending_beacon_hints(void)
3134 struct cfg80211_registered_device *rdev;
3135 struct reg_beacon *pending_beacon, *tmp;
3137 /* This goes through the _pending_ beacon list */
3138 spin_lock_bh(®_pending_beacons_lock);
3140 list_for_each_entry_safe(pending_beacon, tmp,
3141 ®_pending_beacons, list) {
3142 list_del_init(&pending_beacon->list);
3144 /* Applies the beacon hint to current wiphys */
3146 wiphy_update_new_beacon(&rdev->wiphy, pending_beacon);
3148 /* Remembers the beacon hint for new wiphys or reg changes */
3149 list_add_tail(&pending_beacon->list, ®_beacon_list);
3152 spin_unlock_bh(®_pending_beacons_lock);
3155 static void reg_process_self_managed_hint(struct wiphy *wiphy)
3157 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
3158 const struct ieee80211_regdomain *tmp;
3159 const struct ieee80211_regdomain *regd;
3160 enum nl80211_band band;
3161 struct regulatory_request request = {};
3164 lockdep_assert_wiphy(wiphy);
3166 spin_lock(®_requests_lock);
3167 regd = rdev->requested_regd;
3168 rdev->requested_regd = NULL;
3169 spin_unlock(®_requests_lock);
3174 tmp = get_wiphy_regdom(wiphy);
3175 rcu_assign_pointer(wiphy->regd, regd);
3176 rcu_free_regdom(tmp);
3178 for (band = 0; band < NUM_NL80211_BANDS; band++)
3179 handle_band_custom(wiphy, wiphy->bands[band], regd);
3181 reg_process_ht_flags(wiphy);
3183 request.wiphy_idx = get_wiphy_idx(wiphy);
3184 request.alpha2[0] = regd->alpha2[0];
3185 request.alpha2[1] = regd->alpha2[1];
3186 request.initiator = NL80211_REGDOM_SET_BY_DRIVER;
3188 if (wiphy->flags & WIPHY_FLAG_NOTIFY_REGDOM_BY_DRIVER)
3189 reg_call_notifier(wiphy, &request);
3191 nl80211_send_wiphy_reg_change_event(&request);
3194 static void reg_process_self_managed_hints(void)
3196 struct cfg80211_registered_device *rdev;
3200 for_each_rdev(rdev) {
3201 wiphy_lock(&rdev->wiphy);
3202 reg_process_self_managed_hint(&rdev->wiphy);
3203 wiphy_unlock(&rdev->wiphy);
3206 reg_check_channels();
3209 static void reg_todo(struct work_struct *work)
3212 reg_process_pending_hints();
3213 reg_process_pending_beacon_hints();
3214 reg_process_self_managed_hints();
3218 static void queue_regulatory_request(struct regulatory_request *request)
3220 request->alpha2[0] = toupper(request->alpha2[0]);
3221 request->alpha2[1] = toupper(request->alpha2[1]);
3223 spin_lock(®_requests_lock);
3224 list_add_tail(&request->list, ®_requests_list);
3225 spin_unlock(®_requests_lock);
3227 schedule_work(®_work);
3231 * Core regulatory hint -- happens during cfg80211_init()
3232 * and when we restore regulatory settings.
3234 static int regulatory_hint_core(const char *alpha2)
3236 struct regulatory_request *request;
3238 request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL);
3242 request->alpha2[0] = alpha2[0];
3243 request->alpha2[1] = alpha2[1];
3244 request->initiator = NL80211_REGDOM_SET_BY_CORE;
3245 request->wiphy_idx = WIPHY_IDX_INVALID;
3247 queue_regulatory_request(request);
3253 int regulatory_hint_user(const char *alpha2,
3254 enum nl80211_user_reg_hint_type user_reg_hint_type)
3256 struct regulatory_request *request;
3258 if (WARN_ON(!alpha2))
3261 if (!is_world_regdom(alpha2) && !is_an_alpha2(alpha2))
3264 request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL);
3268 request->wiphy_idx = WIPHY_IDX_INVALID;
3269 request->alpha2[0] = alpha2[0];
3270 request->alpha2[1] = alpha2[1];
3271 request->initiator = NL80211_REGDOM_SET_BY_USER;
3272 request->user_reg_hint_type = user_reg_hint_type;
3274 /* Allow calling CRDA again */
3275 reset_crda_timeouts();
3277 queue_regulatory_request(request);
3282 int regulatory_hint_indoor(bool is_indoor, u32 portid)
3284 spin_lock(®_indoor_lock);
3286 /* It is possible that more than one user space process is trying to
3287 * configure the indoor setting. To handle such cases, clear the indoor
3288 * setting in case that some process does not think that the device
3289 * is operating in an indoor environment. In addition, if a user space
3290 * process indicates that it is controlling the indoor setting, save its
3291 * portid, i.e., make it the owner.
3293 reg_is_indoor = is_indoor;
3294 if (reg_is_indoor) {
3295 if (!reg_is_indoor_portid)
3296 reg_is_indoor_portid = portid;
3298 reg_is_indoor_portid = 0;
3301 spin_unlock(®_indoor_lock);
3304 reg_check_channels();
3309 void regulatory_netlink_notify(u32 portid)
3311 spin_lock(®_indoor_lock);
3313 if (reg_is_indoor_portid != portid) {
3314 spin_unlock(®_indoor_lock);
3318 reg_is_indoor = false;
3319 reg_is_indoor_portid = 0;
3321 spin_unlock(®_indoor_lock);
3323 reg_check_channels();
3327 int regulatory_hint(struct wiphy *wiphy, const char *alpha2)
3329 struct regulatory_request *request;
3331 if (WARN_ON(!alpha2 || !wiphy))
3334 wiphy->regulatory_flags &= ~REGULATORY_CUSTOM_REG;
3336 request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL);
3340 request->wiphy_idx = get_wiphy_idx(wiphy);
3342 request->alpha2[0] = alpha2[0];
3343 request->alpha2[1] = alpha2[1];
3344 request->initiator = NL80211_REGDOM_SET_BY_DRIVER;
3346 /* Allow calling CRDA again */
3347 reset_crda_timeouts();
3349 queue_regulatory_request(request);
3353 EXPORT_SYMBOL(regulatory_hint);
3355 void regulatory_hint_country_ie(struct wiphy *wiphy, enum nl80211_band band,
3356 const u8 *country_ie, u8 country_ie_len)
3359 enum environment_cap env = ENVIRON_ANY;
3360 struct regulatory_request *request = NULL, *lr;
3362 /* IE len must be evenly divisible by 2 */
3363 if (country_ie_len & 0x01)
3366 if (country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
3369 request = kzalloc(sizeof(*request), GFP_KERNEL);
3373 alpha2[0] = country_ie[0];
3374 alpha2[1] = country_ie[1];
3376 if (country_ie[2] == 'I')
3377 env = ENVIRON_INDOOR;
3378 else if (country_ie[2] == 'O')
3379 env = ENVIRON_OUTDOOR;
3382 lr = get_last_request();
3388 * We will run this only upon a successful connection on cfg80211.
3389 * We leave conflict resolution to the workqueue, where can hold
3392 if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE &&
3393 lr->wiphy_idx != WIPHY_IDX_INVALID)
3396 request->wiphy_idx = get_wiphy_idx(wiphy);
3397 request->alpha2[0] = alpha2[0];
3398 request->alpha2[1] = alpha2[1];
3399 request->initiator = NL80211_REGDOM_SET_BY_COUNTRY_IE;
3400 request->country_ie_env = env;
3402 /* Allow calling CRDA again */
3403 reset_crda_timeouts();
3405 queue_regulatory_request(request);
3412 static void restore_alpha2(char *alpha2, bool reset_user)
3414 /* indicates there is no alpha2 to consider for restoration */
3418 /* The user setting has precedence over the module parameter */
3419 if (is_user_regdom_saved()) {
3420 /* Unless we're asked to ignore it and reset it */
3422 pr_debug("Restoring regulatory settings including user preference\n");
3423 user_alpha2[0] = '9';
3424 user_alpha2[1] = '7';
3427 * If we're ignoring user settings, we still need to
3428 * check the module parameter to ensure we put things
3429 * back as they were for a full restore.
3431 if (!is_world_regdom(ieee80211_regdom)) {
3432 pr_debug("Keeping preference on module parameter ieee80211_regdom: %c%c\n",
3433 ieee80211_regdom[0], ieee80211_regdom[1]);
3434 alpha2[0] = ieee80211_regdom[0];
3435 alpha2[1] = ieee80211_regdom[1];
3438 pr_debug("Restoring regulatory settings while preserving user preference for: %c%c\n",
3439 user_alpha2[0], user_alpha2[1]);
3440 alpha2[0] = user_alpha2[0];
3441 alpha2[1] = user_alpha2[1];
3443 } else if (!is_world_regdom(ieee80211_regdom)) {
3444 pr_debug("Keeping preference on module parameter ieee80211_regdom: %c%c\n",
3445 ieee80211_regdom[0], ieee80211_regdom[1]);
3446 alpha2[0] = ieee80211_regdom[0];
3447 alpha2[1] = ieee80211_regdom[1];
3449 pr_debug("Restoring regulatory settings\n");
3452 static void restore_custom_reg_settings(struct wiphy *wiphy)
3454 struct ieee80211_supported_band *sband;
3455 enum nl80211_band band;
3456 struct ieee80211_channel *chan;
3459 for (band = 0; band < NUM_NL80211_BANDS; band++) {
3460 sband = wiphy->bands[band];
3463 for (i = 0; i < sband->n_channels; i++) {
3464 chan = &sband->channels[i];
3465 chan->flags = chan->orig_flags;
3466 chan->max_antenna_gain = chan->orig_mag;
3467 chan->max_power = chan->orig_mpwr;
3468 chan->beacon_found = false;
3474 * Restoring regulatory settings involves ignoring any
3475 * possibly stale country IE information and user regulatory
3476 * settings if so desired, this includes any beacon hints
3477 * learned as we could have traveled outside to another country
3478 * after disconnection. To restore regulatory settings we do
3479 * exactly what we did at bootup:
3481 * - send a core regulatory hint
3482 * - send a user regulatory hint if applicable
3484 * Device drivers that send a regulatory hint for a specific country
3485 * keep their own regulatory domain on wiphy->regd so that does
3486 * not need to be remembered.
3488 static void restore_regulatory_settings(bool reset_user, bool cached)
3491 char world_alpha2[2];
3492 struct reg_beacon *reg_beacon, *btmp;
3493 LIST_HEAD(tmp_reg_req_list);
3494 struct cfg80211_registered_device *rdev;
3499 * Clear the indoor setting in case that it is not controlled by user
3500 * space, as otherwise there is no guarantee that the device is still
3501 * operating in an indoor environment.
3503 spin_lock(®_indoor_lock);
3504 if (reg_is_indoor && !reg_is_indoor_portid) {
3505 reg_is_indoor = false;
3506 reg_check_channels();
3508 spin_unlock(®_indoor_lock);
3510 reset_regdomains(true, &world_regdom);
3511 restore_alpha2(alpha2, reset_user);
3514 * If there's any pending requests we simply
3515 * stash them to a temporary pending queue and
3516 * add then after we've restored regulatory
3519 spin_lock(®_requests_lock);
3520 list_splice_tail_init(®_requests_list, &tmp_reg_req_list);
3521 spin_unlock(®_requests_lock);
3523 /* Clear beacon hints */
3524 spin_lock_bh(®_pending_beacons_lock);
3525 list_for_each_entry_safe(reg_beacon, btmp, ®_pending_beacons, list) {
3526 list_del(®_beacon->list);
3529 spin_unlock_bh(®_pending_beacons_lock);
3531 list_for_each_entry_safe(reg_beacon, btmp, ®_beacon_list, list) {
3532 list_del(®_beacon->list);
3536 /* First restore to the basic regulatory settings */
3537 world_alpha2[0] = cfg80211_world_regdom->alpha2[0];
3538 world_alpha2[1] = cfg80211_world_regdom->alpha2[1];
3540 for_each_rdev(rdev) {
3541 if (rdev->wiphy.regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED)
3543 if (rdev->wiphy.regulatory_flags & REGULATORY_CUSTOM_REG)
3544 restore_custom_reg_settings(&rdev->wiphy);
3547 if (cached && (!is_an_alpha2(alpha2) ||
3548 !IS_ERR_OR_NULL(cfg80211_user_regdom))) {
3549 reset_regdomains(false, cfg80211_world_regdom);
3550 update_all_wiphy_regulatory(NL80211_REGDOM_SET_BY_CORE);
3551 print_regdomain(get_cfg80211_regdom());
3552 nl80211_send_reg_change_event(&core_request_world);
3553 reg_set_request_processed();
3555 if (is_an_alpha2(alpha2) &&
3556 !regulatory_hint_user(alpha2, NL80211_USER_REG_HINT_USER)) {
3557 struct regulatory_request *ureq;
3559 spin_lock(®_requests_lock);
3560 ureq = list_last_entry(®_requests_list,
3561 struct regulatory_request,
3563 list_del(&ureq->list);
3564 spin_unlock(®_requests_lock);
3566 notify_self_managed_wiphys(ureq);
3567 reg_update_last_request(ureq);
3568 set_regdom(reg_copy_regd(cfg80211_user_regdom),
3569 REGD_SOURCE_CACHED);
3572 regulatory_hint_core(world_alpha2);
3575 * This restores the ieee80211_regdom module parameter
3576 * preference or the last user requested regulatory
3577 * settings, user regulatory settings takes precedence.
3579 if (is_an_alpha2(alpha2))
3580 regulatory_hint_user(alpha2, NL80211_USER_REG_HINT_USER);
3583 spin_lock(®_requests_lock);
3584 list_splice_tail_init(&tmp_reg_req_list, ®_requests_list);
3585 spin_unlock(®_requests_lock);
3587 pr_debug("Kicking the queue\n");
3589 schedule_work(®_work);
3592 static bool is_wiphy_all_set_reg_flag(enum ieee80211_regulatory_flags flag)
3594 struct cfg80211_registered_device *rdev;
3595 struct wireless_dev *wdev;
3597 for_each_rdev(rdev) {
3598 wiphy_lock(&rdev->wiphy);
3599 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
3600 if (!(wdev->wiphy->regulatory_flags & flag)) {
3601 wiphy_unlock(&rdev->wiphy);
3605 wiphy_unlock(&rdev->wiphy);
3611 void regulatory_hint_disconnect(void)
3613 /* Restore of regulatory settings is not required when wiphy(s)
3614 * ignore IE from connected access point but clearance of beacon hints
3615 * is required when wiphy(s) supports beacon hints.
3617 if (is_wiphy_all_set_reg_flag(REGULATORY_COUNTRY_IE_IGNORE)) {
3618 struct reg_beacon *reg_beacon, *btmp;
3620 if (is_wiphy_all_set_reg_flag(REGULATORY_DISABLE_BEACON_HINTS))
3623 spin_lock_bh(®_pending_beacons_lock);
3624 list_for_each_entry_safe(reg_beacon, btmp,
3625 ®_pending_beacons, list) {
3626 list_del(®_beacon->list);
3629 spin_unlock_bh(®_pending_beacons_lock);
3631 list_for_each_entry_safe(reg_beacon, btmp,
3632 ®_beacon_list, list) {
3633 list_del(®_beacon->list);
3640 pr_debug("All devices are disconnected, going to restore regulatory settings\n");
3641 restore_regulatory_settings(false, true);
3644 static bool freq_is_chan_12_13_14(u32 freq)
3646 if (freq == ieee80211_channel_to_frequency(12, NL80211_BAND_2GHZ) ||
3647 freq == ieee80211_channel_to_frequency(13, NL80211_BAND_2GHZ) ||
3648 freq == ieee80211_channel_to_frequency(14, NL80211_BAND_2GHZ))
3653 static bool pending_reg_beacon(struct ieee80211_channel *beacon_chan)
3655 struct reg_beacon *pending_beacon;
3657 list_for_each_entry(pending_beacon, ®_pending_beacons, list)
3658 if (ieee80211_channel_equal(beacon_chan,
3659 &pending_beacon->chan))
3664 int regulatory_hint_found_beacon(struct wiphy *wiphy,
3665 struct ieee80211_channel *beacon_chan,
3668 struct reg_beacon *reg_beacon;
3671 if (beacon_chan->beacon_found ||
3672 beacon_chan->flags & IEEE80211_CHAN_RADAR ||
3673 (beacon_chan->band == NL80211_BAND_2GHZ &&
3674 !freq_is_chan_12_13_14(beacon_chan->center_freq)))
3677 spin_lock_bh(®_pending_beacons_lock);
3678 processing = pending_reg_beacon(beacon_chan);
3679 spin_unlock_bh(®_pending_beacons_lock);
3684 reg_beacon = kzalloc(sizeof(struct reg_beacon), gfp);
3688 pr_debug("Found new beacon on frequency: %d.%03d MHz (Ch %d) on %s\n",
3689 beacon_chan->center_freq, beacon_chan->freq_offset,
3690 ieee80211_freq_khz_to_channel(
3691 ieee80211_channel_to_khz(beacon_chan)),
3694 memcpy(®_beacon->chan, beacon_chan,
3695 sizeof(struct ieee80211_channel));
3698 * Since we can be called from BH or and non-BH context
3699 * we must use spin_lock_bh()
3701 spin_lock_bh(®_pending_beacons_lock);
3702 list_add_tail(®_beacon->list, ®_pending_beacons);
3703 spin_unlock_bh(®_pending_beacons_lock);
3705 schedule_work(®_work);
3710 static void print_rd_rules(const struct ieee80211_regdomain *rd)
3713 const struct ieee80211_reg_rule *reg_rule = NULL;
3714 const struct ieee80211_freq_range *freq_range = NULL;
3715 const struct ieee80211_power_rule *power_rule = NULL;
3716 char bw[32], cac_time[32];
3718 pr_debug(" (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp), (dfs_cac_time)\n");
3720 for (i = 0; i < rd->n_reg_rules; i++) {
3721 reg_rule = &rd->reg_rules[i];
3722 freq_range = ®_rule->freq_range;
3723 power_rule = ®_rule->power_rule;
3725 if (reg_rule->flags & NL80211_RRF_AUTO_BW)
3726 snprintf(bw, sizeof(bw), "%d KHz, %u KHz AUTO",
3727 freq_range->max_bandwidth_khz,
3728 reg_get_max_bandwidth(rd, reg_rule));
3730 snprintf(bw, sizeof(bw), "%d KHz",
3731 freq_range->max_bandwidth_khz);
3733 if (reg_rule->flags & NL80211_RRF_DFS)
3734 scnprintf(cac_time, sizeof(cac_time), "%u s",
3735 reg_rule->dfs_cac_ms/1000);
3737 scnprintf(cac_time, sizeof(cac_time), "N/A");
3741 * There may not be documentation for max antenna gain
3742 * in certain regions
3744 if (power_rule->max_antenna_gain)
3745 pr_debug(" (%d KHz - %d KHz @ %s), (%d mBi, %d mBm), (%s)\n",
3746 freq_range->start_freq_khz,
3747 freq_range->end_freq_khz,
3749 power_rule->max_antenna_gain,
3750 power_rule->max_eirp,
3753 pr_debug(" (%d KHz - %d KHz @ %s), (N/A, %d mBm), (%s)\n",
3754 freq_range->start_freq_khz,
3755 freq_range->end_freq_khz,
3757 power_rule->max_eirp,
3762 bool reg_supported_dfs_region(enum nl80211_dfs_regions dfs_region)
3764 switch (dfs_region) {
3765 case NL80211_DFS_UNSET:
3766 case NL80211_DFS_FCC:
3767 case NL80211_DFS_ETSI:
3768 case NL80211_DFS_JP:
3771 pr_debug("Ignoring unknown DFS master region: %d\n", dfs_region);
3776 static void print_regdomain(const struct ieee80211_regdomain *rd)
3778 struct regulatory_request *lr = get_last_request();
3780 if (is_intersected_alpha2(rd->alpha2)) {
3781 if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) {
3782 struct cfg80211_registered_device *rdev;
3783 rdev = cfg80211_rdev_by_wiphy_idx(lr->wiphy_idx);
3785 pr_debug("Current regulatory domain updated by AP to: %c%c\n",
3786 rdev->country_ie_alpha2[0],
3787 rdev->country_ie_alpha2[1]);
3789 pr_debug("Current regulatory domain intersected:\n");
3791 pr_debug("Current regulatory domain intersected:\n");
3792 } else if (is_world_regdom(rd->alpha2)) {
3793 pr_debug("World regulatory domain updated:\n");
3795 if (is_unknown_alpha2(rd->alpha2))
3796 pr_debug("Regulatory domain changed to driver built-in settings (unknown country)\n");
3798 if (reg_request_cell_base(lr))
3799 pr_debug("Regulatory domain changed to country: %c%c by Cell Station\n",
3800 rd->alpha2[0], rd->alpha2[1]);
3802 pr_debug("Regulatory domain changed to country: %c%c\n",
3803 rd->alpha2[0], rd->alpha2[1]);
3807 pr_debug(" DFS Master region: %s", reg_dfs_region_str(rd->dfs_region));
3811 static void print_regdomain_info(const struct ieee80211_regdomain *rd)
3813 pr_debug("Regulatory domain: %c%c\n", rd->alpha2[0], rd->alpha2[1]);
3817 static int reg_set_rd_core(const struct ieee80211_regdomain *rd)
3819 if (!is_world_regdom(rd->alpha2))
3821 update_world_regdomain(rd);
3825 static int reg_set_rd_user(const struct ieee80211_regdomain *rd,
3826 struct regulatory_request *user_request)
3828 const struct ieee80211_regdomain *intersected_rd = NULL;
3830 if (!regdom_changes(rd->alpha2))
3833 if (!is_valid_rd(rd)) {
3834 pr_err("Invalid regulatory domain detected: %c%c\n",
3835 rd->alpha2[0], rd->alpha2[1]);
3836 print_regdomain_info(rd);
3840 if (!user_request->intersect) {
3841 reset_regdomains(false, rd);
3845 intersected_rd = regdom_intersect(rd, get_cfg80211_regdom());
3846 if (!intersected_rd)
3851 reset_regdomains(false, intersected_rd);
3856 static int reg_set_rd_driver(const struct ieee80211_regdomain *rd,
3857 struct regulatory_request *driver_request)
3859 const struct ieee80211_regdomain *regd;
3860 const struct ieee80211_regdomain *intersected_rd = NULL;
3861 const struct ieee80211_regdomain *tmp = NULL;
3862 struct wiphy *request_wiphy;
3864 if (is_world_regdom(rd->alpha2))
3867 if (!regdom_changes(rd->alpha2))
3870 if (!is_valid_rd(rd)) {
3871 pr_err("Invalid regulatory domain detected: %c%c\n",
3872 rd->alpha2[0], rd->alpha2[1]);
3873 print_regdomain_info(rd);
3877 request_wiphy = wiphy_idx_to_wiphy(driver_request->wiphy_idx);
3881 if (!driver_request->intersect) {
3883 wiphy_lock(request_wiphy);
3884 if (request_wiphy->regd)
3885 tmp = get_wiphy_regdom(request_wiphy);
3887 regd = reg_copy_regd(rd);
3889 wiphy_unlock(request_wiphy);
3890 return PTR_ERR(regd);
3893 rcu_assign_pointer(request_wiphy->regd, regd);
3894 rcu_free_regdom(tmp);
3895 wiphy_unlock(request_wiphy);
3896 reset_regdomains(false, rd);
3900 intersected_rd = regdom_intersect(rd, get_cfg80211_regdom());
3901 if (!intersected_rd)
3905 * We can trash what CRDA provided now.
3906 * However if a driver requested this specific regulatory
3907 * domain we keep it for its private use
3909 tmp = get_wiphy_regdom(request_wiphy);
3910 rcu_assign_pointer(request_wiphy->regd, rd);
3911 rcu_free_regdom(tmp);
3915 reset_regdomains(false, intersected_rd);
3920 static int reg_set_rd_country_ie(const struct ieee80211_regdomain *rd,
3921 struct regulatory_request *country_ie_request)
3923 struct wiphy *request_wiphy;
3925 if (!is_alpha2_set(rd->alpha2) && !is_an_alpha2(rd->alpha2) &&
3926 !is_unknown_alpha2(rd->alpha2))
3930 * Lets only bother proceeding on the same alpha2 if the current
3931 * rd is non static (it means CRDA was present and was used last)
3932 * and the pending request came in from a country IE
3935 if (!is_valid_rd(rd)) {
3936 pr_err("Invalid regulatory domain detected: %c%c\n",
3937 rd->alpha2[0], rd->alpha2[1]);
3938 print_regdomain_info(rd);
3942 request_wiphy = wiphy_idx_to_wiphy(country_ie_request->wiphy_idx);
3946 if (country_ie_request->intersect)
3949 reset_regdomains(false, rd);
3954 * Use this call to set the current regulatory domain. Conflicts with
3955 * multiple drivers can be ironed out later. Caller must've already
3956 * kmalloc'd the rd structure.
3958 int set_regdom(const struct ieee80211_regdomain *rd,
3959 enum ieee80211_regd_source regd_src)
3961 struct regulatory_request *lr;
3962 bool user_reset = false;
3965 if (IS_ERR_OR_NULL(rd))
3968 if (!reg_is_valid_request(rd->alpha2)) {
3973 if (regd_src == REGD_SOURCE_CRDA)
3974 reset_crda_timeouts();
3976 lr = get_last_request();
3978 /* Note that this doesn't update the wiphys, this is done below */
3979 switch (lr->initiator) {
3980 case NL80211_REGDOM_SET_BY_CORE:
3981 r = reg_set_rd_core(rd);
3983 case NL80211_REGDOM_SET_BY_USER:
3984 cfg80211_save_user_regdom(rd);
3985 r = reg_set_rd_user(rd, lr);
3988 case NL80211_REGDOM_SET_BY_DRIVER:
3989 r = reg_set_rd_driver(rd, lr);
3991 case NL80211_REGDOM_SET_BY_COUNTRY_IE:
3992 r = reg_set_rd_country_ie(rd, lr);
3995 WARN(1, "invalid initiator %d\n", lr->initiator);
4003 reg_set_request_processed();
4006 /* Back to world regulatory in case of errors */
4007 restore_regulatory_settings(user_reset, false);
4014 /* This would make this whole thing pointless */
4015 if (WARN_ON(!lr->intersect && rd != get_cfg80211_regdom()))
4018 /* update all wiphys now with the new established regulatory domain */
4019 update_all_wiphy_regulatory(lr->initiator);
4021 print_regdomain(get_cfg80211_regdom());
4023 nl80211_send_reg_change_event(lr);
4025 reg_set_request_processed();
4030 static int __regulatory_set_wiphy_regd(struct wiphy *wiphy,
4031 struct ieee80211_regdomain *rd)
4033 const struct ieee80211_regdomain *regd;
4034 const struct ieee80211_regdomain *prev_regd;
4035 struct cfg80211_registered_device *rdev;
4037 if (WARN_ON(!wiphy || !rd))
4040 if (WARN(!(wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED),
4041 "wiphy should have REGULATORY_WIPHY_SELF_MANAGED\n"))
4044 if (WARN(!is_valid_rd(rd),
4045 "Invalid regulatory domain detected: %c%c\n",
4046 rd->alpha2[0], rd->alpha2[1])) {
4047 print_regdomain_info(rd);
4051 regd = reg_copy_regd(rd);
4053 return PTR_ERR(regd);
4055 rdev = wiphy_to_rdev(wiphy);
4057 spin_lock(®_requests_lock);
4058 prev_regd = rdev->requested_regd;
4059 rdev->requested_regd = regd;
4060 spin_unlock(®_requests_lock);
4066 int regulatory_set_wiphy_regd(struct wiphy *wiphy,
4067 struct ieee80211_regdomain *rd)
4069 int ret = __regulatory_set_wiphy_regd(wiphy, rd);
4074 schedule_work(®_work);
4077 EXPORT_SYMBOL(regulatory_set_wiphy_regd);
4079 int regulatory_set_wiphy_regd_sync(struct wiphy *wiphy,
4080 struct ieee80211_regdomain *rd)
4086 ret = __regulatory_set_wiphy_regd(wiphy, rd);
4090 /* process the request immediately */
4091 reg_process_self_managed_hint(wiphy);
4092 reg_check_channels();
4095 EXPORT_SYMBOL(regulatory_set_wiphy_regd_sync);
4097 void wiphy_regulatory_register(struct wiphy *wiphy)
4099 struct regulatory_request *lr = get_last_request();
4101 /* self-managed devices ignore beacon hints and country IE */
4102 if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) {
4103 wiphy->regulatory_flags |= REGULATORY_DISABLE_BEACON_HINTS |
4104 REGULATORY_COUNTRY_IE_IGNORE;
4107 * The last request may have been received before this
4108 * registration call. Call the driver notifier if
4109 * initiator is USER.
4111 if (lr->initiator == NL80211_REGDOM_SET_BY_USER)
4112 reg_call_notifier(wiphy, lr);
4115 if (!reg_dev_ignore_cell_hint(wiphy))
4116 reg_num_devs_support_basehint++;
4118 wiphy_update_regulatory(wiphy, lr->initiator);
4119 wiphy_all_share_dfs_chan_state(wiphy);
4120 reg_process_self_managed_hints();
4123 void wiphy_regulatory_deregister(struct wiphy *wiphy)
4125 struct wiphy *request_wiphy = NULL;
4126 struct regulatory_request *lr;
4128 lr = get_last_request();
4130 if (!reg_dev_ignore_cell_hint(wiphy))
4131 reg_num_devs_support_basehint--;
4133 rcu_free_regdom(get_wiphy_regdom(wiphy));
4134 RCU_INIT_POINTER(wiphy->regd, NULL);
4137 request_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx);
4139 if (!request_wiphy || request_wiphy != wiphy)
4142 lr->wiphy_idx = WIPHY_IDX_INVALID;
4143 lr->country_ie_env = ENVIRON_ANY;
4147 * See FCC notices for UNII band definitions
4148 * 5GHz: https://www.fcc.gov/document/5-ghz-unlicensed-spectrum-unii
4149 * 6GHz: https://www.fcc.gov/document/fcc-proposes-more-spectrum-unlicensed-use-0
4151 int cfg80211_get_unii(int freq)
4154 if (freq >= 5150 && freq <= 5250)
4158 if (freq > 5250 && freq <= 5350)
4162 if (freq > 5350 && freq <= 5470)
4166 if (freq > 5470 && freq <= 5725)
4170 if (freq > 5725 && freq <= 5825)
4174 if (freq > 5925 && freq <= 6425)
4178 if (freq > 6425 && freq <= 6525)
4182 if (freq > 6525 && freq <= 6875)
4186 if (freq > 6875 && freq <= 7125)
4192 bool regulatory_indoor_allowed(void)
4194 return reg_is_indoor;
4197 bool regulatory_pre_cac_allowed(struct wiphy *wiphy)
4199 const struct ieee80211_regdomain *regd = NULL;
4200 const struct ieee80211_regdomain *wiphy_regd = NULL;
4201 bool pre_cac_allowed = false;
4205 regd = rcu_dereference(cfg80211_regdomain);
4206 wiphy_regd = rcu_dereference(wiphy->regd);
4208 if (regd->dfs_region == NL80211_DFS_ETSI)
4209 pre_cac_allowed = true;
4213 return pre_cac_allowed;
4216 if (regd->dfs_region == wiphy_regd->dfs_region &&
4217 wiphy_regd->dfs_region == NL80211_DFS_ETSI)
4218 pre_cac_allowed = true;
4222 return pre_cac_allowed;
4224 EXPORT_SYMBOL(regulatory_pre_cac_allowed);
4226 static void cfg80211_check_and_end_cac(struct cfg80211_registered_device *rdev)
4228 struct wireless_dev *wdev;
4229 /* If we finished CAC or received radar, we should end any
4230 * CAC running on the same channels.
4231 * the check !cfg80211_chandef_dfs_usable contain 2 options:
4232 * either all channels are available - those the CAC_FINISHED
4233 * event has effected another wdev state, or there is a channel
4234 * in unavailable state in wdev chandef - those the RADAR_DETECTED
4235 * event has effected another wdev state.
4236 * In both cases we should end the CAC on the wdev.
4238 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
4239 struct cfg80211_chan_def *chandef;
4241 if (!wdev->cac_started)
4244 /* FIXME: radar detection is tied to link 0 for now */
4245 chandef = wdev_chandef(wdev, 0);
4249 if (!cfg80211_chandef_dfs_usable(&rdev->wiphy, chandef))
4250 rdev_end_cac(rdev, wdev->netdev);
4254 void regulatory_propagate_dfs_state(struct wiphy *wiphy,
4255 struct cfg80211_chan_def *chandef,
4256 enum nl80211_dfs_state dfs_state,
4257 enum nl80211_radar_event event)
4259 struct cfg80211_registered_device *rdev;
4263 if (WARN_ON(!cfg80211_chandef_valid(chandef)))
4266 for_each_rdev(rdev) {
4267 if (wiphy == &rdev->wiphy)
4270 if (!reg_dfs_domain_same(wiphy, &rdev->wiphy))
4273 if (!ieee80211_get_channel(&rdev->wiphy,
4274 chandef->chan->center_freq))
4277 cfg80211_set_dfs_state(&rdev->wiphy, chandef, dfs_state);
4279 if (event == NL80211_RADAR_DETECTED ||
4280 event == NL80211_RADAR_CAC_FINISHED) {
4281 cfg80211_sched_dfs_chan_update(rdev);
4282 cfg80211_check_and_end_cac(rdev);
4285 nl80211_radar_notify(rdev, chandef, event, NULL, GFP_KERNEL);
4289 static int __init regulatory_init_db(void)
4294 * It's possible that - due to other bugs/issues - cfg80211
4295 * never called regulatory_init() below, or that it failed;
4296 * in that case, don't try to do any further work here as
4297 * it's doomed to lead to crashes.
4299 if (IS_ERR_OR_NULL(reg_pdev))
4302 err = load_builtin_regdb_keys();
4304 platform_device_unregister(reg_pdev);
4308 /* We always try to get an update for the static regdomain */
4309 err = regulatory_hint_core(cfg80211_world_regdom->alpha2);
4311 if (err == -ENOMEM) {
4312 platform_device_unregister(reg_pdev);
4316 * N.B. kobject_uevent_env() can fail mainly for when we're out
4317 * memory which is handled and propagated appropriately above
4318 * but it can also fail during a netlink_broadcast() or during
4319 * early boot for call_usermodehelper(). For now treat these
4320 * errors as non-fatal.
4322 pr_err("kobject_uevent_env() was unable to call CRDA during init\n");
4326 * Finally, if the user set the module parameter treat it
4329 if (!is_world_regdom(ieee80211_regdom))
4330 regulatory_hint_user(ieee80211_regdom,
4331 NL80211_USER_REG_HINT_USER);
4336 late_initcall(regulatory_init_db);
4339 int __init regulatory_init(void)
4341 reg_pdev = platform_device_register_simple("regulatory", 0, NULL, 0);
4342 if (IS_ERR(reg_pdev))
4343 return PTR_ERR(reg_pdev);
4345 rcu_assign_pointer(cfg80211_regdomain, cfg80211_world_regdom);
4347 user_alpha2[0] = '9';
4348 user_alpha2[1] = '7';
4351 return regulatory_init_db();
4357 void regulatory_exit(void)
4359 struct regulatory_request *reg_request, *tmp;
4360 struct reg_beacon *reg_beacon, *btmp;
4362 cancel_work_sync(®_work);
4363 cancel_crda_timeout_sync();
4364 cancel_delayed_work_sync(®_check_chans);
4366 /* Lock to suppress warnings */
4368 reset_regdomains(true, NULL);
4371 dev_set_uevent_suppress(®_pdev->dev, true);
4373 platform_device_unregister(reg_pdev);
4375 list_for_each_entry_safe(reg_beacon, btmp, ®_pending_beacons, list) {
4376 list_del(®_beacon->list);
4380 list_for_each_entry_safe(reg_beacon, btmp, ®_beacon_list, list) {
4381 list_del(®_beacon->list);
4385 list_for_each_entry_safe(reg_request, tmp, ®_requests_list, list) {
4386 list_del(®_request->list);
4390 if (!IS_ERR_OR_NULL(regdb))
4392 if (!IS_ERR_OR_NULL(cfg80211_user_regdom))
4393 kfree(cfg80211_user_regdom);
4395 free_regdb_keyring();