2 * Copyright 2002-2005, Instant802 Networks, Inc.
3 * Copyright 2005-2006, Devicescape Software, Inc.
4 * Copyright 2007 Johannes Berg <johannes@sipsolutions.net>
5 * Copyright 2008-2011 Luis R. Rodriguez <mcgrof@qca.qualcomm.com>
6 * Copyright 2013-2014 Intel Mobile Communications GmbH
7 * Copyright 2017 Intel Deutschland GmbH
8 * Copyright (C) 2018 - 2021 Intel Corporation
10 * Permission to use, copy, modify, and/or distribute this software for any
11 * purpose with or without fee is hereby granted, provided that the above
12 * copyright notice and this permission notice appear in all copies.
14 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
15 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
16 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
17 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
18 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
19 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
20 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
25 * DOC: Wireless regulatory infrastructure
27 * The usual implementation is for a driver to read a device EEPROM to
28 * determine which regulatory domain it should be operating under, then
29 * looking up the allowable channels in a driver-local table and finally
30 * registering those channels in the wiphy structure.
32 * Another set of compliance enforcement is for drivers to use their
33 * own compliance limits which can be stored on the EEPROM. The host
34 * driver or firmware may ensure these are used.
36 * In addition to all this we provide an extra layer of regulatory
37 * conformance. For drivers which do not have any regulatory
38 * information CRDA provides the complete regulatory solution.
39 * For others it provides a community effort on further restrictions
40 * to enhance compliance.
42 * Note: When number of rules --> infinity we will not be able to
43 * index on alpha2 any more, instead we'll probably have to
44 * rely on some SHA1 checksum of the regdomain for example.
48 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
50 #include <linux/kernel.h>
51 #include <linux/export.h>
52 #include <linux/slab.h>
53 #include <linux/list.h>
54 #include <linux/ctype.h>
55 #include <linux/nl80211.h>
56 #include <linux/platform_device.h>
57 #include <linux/verification.h>
58 #include <linux/moduleparam.h>
59 #include <linux/firmware.h>
60 #include <net/cfg80211.h>
67 * Grace period we give before making sure all current interfaces reside on
68 * channels allowed by the current regulatory domain.
70 #define REG_ENFORCE_GRACE_MS 60000
73 * enum reg_request_treatment - regulatory request treatment
75 * @REG_REQ_OK: continue processing the regulatory request
76 * @REG_REQ_IGNORE: ignore the regulatory request
77 * @REG_REQ_INTERSECT: the regulatory domain resulting from this request should
78 * be intersected with the current one.
79 * @REG_REQ_ALREADY_SET: the regulatory request will not change the current
80 * regulatory settings, and no further processing is required.
82 enum reg_request_treatment {
89 static struct regulatory_request core_request_world = {
90 .initiator = NL80211_REGDOM_SET_BY_CORE,
95 .country_ie_env = ENVIRON_ANY,
99 * Receipt of information from last regulatory request,
100 * protected by RTNL (and can be accessed with RCU protection)
102 static struct regulatory_request __rcu *last_request =
103 (void __force __rcu *)&core_request_world;
105 /* To trigger userspace events and load firmware */
106 static struct platform_device *reg_pdev;
109 * Central wireless core regulatory domains, we only need two,
110 * the current one and a world regulatory domain in case we have no
111 * information to give us an alpha2.
112 * (protected by RTNL, can be read under RCU)
114 const struct ieee80211_regdomain __rcu *cfg80211_regdomain;
117 * Number of devices that registered to the core
118 * that support cellular base station regulatory hints
119 * (protected by RTNL)
121 static int reg_num_devs_support_basehint;
124 * State variable indicating if the platform on which the devices
125 * are attached is operating in an indoor environment. The state variable
126 * is relevant for all registered devices.
128 static bool reg_is_indoor;
129 static DEFINE_SPINLOCK(reg_indoor_lock);
131 /* Used to track the userspace process controlling the indoor setting */
132 static u32 reg_is_indoor_portid;
134 static void restore_regulatory_settings(bool reset_user, bool cached);
135 static void print_regdomain(const struct ieee80211_regdomain *rd);
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 static struct key *builtin_regdb_keys;
742 static void __init load_keys_from_buffer(const u8 *p, unsigned int buflen)
744 const u8 *end = p + buflen;
749 /* Each cert begins with an ASN.1 SEQUENCE tag and must be more
750 * than 256 bytes in size.
757 plen = (p[2] << 8) | p[3];
762 key = key_create_or_update(make_key_ref(builtin_regdb_keys, 1),
763 "asymmetric", NULL, p, plen,
764 ((KEY_POS_ALL & ~KEY_POS_SETATTR) |
765 KEY_USR_VIEW | KEY_USR_READ),
766 KEY_ALLOC_NOT_IN_QUOTA |
768 KEY_ALLOC_BYPASS_RESTRICTION);
770 pr_err("Problem loading in-kernel X.509 certificate (%ld)\n",
773 pr_notice("Loaded X.509 cert '%s'\n",
774 key_ref_to_ptr(key)->description);
783 pr_err("Problem parsing in-kernel X.509 certificate list\n");
786 static int __init load_builtin_regdb_keys(void)
789 keyring_alloc(".builtin_regdb_keys",
790 KUIDT_INIT(0), KGIDT_INIT(0), current_cred(),
791 ((KEY_POS_ALL & ~KEY_POS_SETATTR) |
792 KEY_USR_VIEW | KEY_USR_READ | KEY_USR_SEARCH),
793 KEY_ALLOC_NOT_IN_QUOTA, NULL, NULL);
794 if (IS_ERR(builtin_regdb_keys))
795 return PTR_ERR(builtin_regdb_keys);
797 pr_notice("Loading compiled-in X.509 certificates for regulatory database\n");
799 #ifdef CONFIG_CFG80211_USE_KERNEL_REGDB_KEYS
800 load_keys_from_buffer(shipped_regdb_certs, shipped_regdb_certs_len);
802 #ifdef CONFIG_CFG80211_EXTRA_REGDB_KEYDIR
803 if (CONFIG_CFG80211_EXTRA_REGDB_KEYDIR[0] != '\0')
804 load_keys_from_buffer(extra_regdb_certs, extra_regdb_certs_len);
810 MODULE_FIRMWARE("regulatory.db.p7s");
812 static bool regdb_has_valid_signature(const u8 *data, unsigned int size)
814 const struct firmware *sig;
817 if (request_firmware(&sig, "regulatory.db.p7s", ®_pdev->dev))
820 result = verify_pkcs7_signature(data, size, sig->data, sig->size,
822 VERIFYING_UNSPECIFIED_SIGNATURE,
825 release_firmware(sig);
830 static void free_regdb_keyring(void)
832 key_put(builtin_regdb_keys);
835 static int load_builtin_regdb_keys(void)
840 static bool regdb_has_valid_signature(const u8 *data, unsigned int size)
845 static void free_regdb_keyring(void)
848 #endif /* CONFIG_CFG80211_REQUIRE_SIGNED_REGDB */
850 static bool valid_regdb(const u8 *data, unsigned int size)
852 const struct fwdb_header *hdr = (void *)data;
853 const struct fwdb_country *country;
855 if (size < sizeof(*hdr))
858 if (hdr->magic != cpu_to_be32(FWDB_MAGIC))
861 if (hdr->version != cpu_to_be32(FWDB_VERSION))
864 if (!regdb_has_valid_signature(data, size))
867 country = &hdr->country[0];
868 while ((u8 *)(country + 1) <= data + size) {
869 if (!country->coll_ptr)
871 if (!valid_country(data, size, country))
879 static void set_wmm_rule(const struct fwdb_header *db,
880 const struct fwdb_country *country,
881 const struct fwdb_rule *rule,
882 struct ieee80211_reg_rule *rrule)
884 struct ieee80211_wmm_rule *wmm_rule = &rrule->wmm_rule;
885 struct fwdb_wmm_rule *wmm;
886 unsigned int i, wmm_ptr;
888 wmm_ptr = be16_to_cpu(rule->wmm_ptr) << 2;
889 wmm = (void *)((u8 *)db + wmm_ptr);
891 if (!valid_wmm(wmm)) {
892 pr_err("Invalid regulatory WMM rule %u-%u in domain %c%c\n",
893 be32_to_cpu(rule->start), be32_to_cpu(rule->end),
894 country->alpha2[0], country->alpha2[1]);
898 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
899 wmm_rule->client[i].cw_min =
900 ecw2cw((wmm->client[i].ecw & 0xf0) >> 4);
901 wmm_rule->client[i].cw_max = ecw2cw(wmm->client[i].ecw & 0x0f);
902 wmm_rule->client[i].aifsn = wmm->client[i].aifsn;
903 wmm_rule->client[i].cot =
904 1000 * be16_to_cpu(wmm->client[i].cot);
905 wmm_rule->ap[i].cw_min = ecw2cw((wmm->ap[i].ecw & 0xf0) >> 4);
906 wmm_rule->ap[i].cw_max = ecw2cw(wmm->ap[i].ecw & 0x0f);
907 wmm_rule->ap[i].aifsn = wmm->ap[i].aifsn;
908 wmm_rule->ap[i].cot = 1000 * be16_to_cpu(wmm->ap[i].cot);
911 rrule->has_wmm = true;
914 static int __regdb_query_wmm(const struct fwdb_header *db,
915 const struct fwdb_country *country, int freq,
916 struct ieee80211_reg_rule *rrule)
918 unsigned int ptr = be16_to_cpu(country->coll_ptr) << 2;
919 struct fwdb_collection *coll = (void *)((u8 *)db + ptr);
922 for (i = 0; i < coll->n_rules; i++) {
923 __be16 *rules_ptr = (void *)((u8 *)coll + ALIGN(coll->len, 2));
924 unsigned int rule_ptr = be16_to_cpu(rules_ptr[i]) << 2;
925 struct fwdb_rule *rule = (void *)((u8 *)db + rule_ptr);
927 if (rule->len < offsetofend(struct fwdb_rule, wmm_ptr))
930 if (freq >= KHZ_TO_MHZ(be32_to_cpu(rule->start)) &&
931 freq <= KHZ_TO_MHZ(be32_to_cpu(rule->end))) {
932 set_wmm_rule(db, country, rule, rrule);
940 int reg_query_regdb_wmm(char *alpha2, int freq, struct ieee80211_reg_rule *rule)
942 const struct fwdb_header *hdr = regdb;
943 const struct fwdb_country *country;
949 return PTR_ERR(regdb);
951 country = &hdr->country[0];
952 while (country->coll_ptr) {
953 if (alpha2_equal(alpha2, country->alpha2))
954 return __regdb_query_wmm(regdb, country, freq, rule);
961 EXPORT_SYMBOL(reg_query_regdb_wmm);
963 static int regdb_query_country(const struct fwdb_header *db,
964 const struct fwdb_country *country)
966 unsigned int ptr = be16_to_cpu(country->coll_ptr) << 2;
967 struct fwdb_collection *coll = (void *)((u8 *)db + ptr);
968 struct ieee80211_regdomain *regdom;
971 regdom = kzalloc(struct_size(regdom, reg_rules, coll->n_rules),
976 regdom->n_reg_rules = coll->n_rules;
977 regdom->alpha2[0] = country->alpha2[0];
978 regdom->alpha2[1] = country->alpha2[1];
979 regdom->dfs_region = coll->dfs_region;
981 for (i = 0; i < regdom->n_reg_rules; i++) {
982 __be16 *rules_ptr = (void *)((u8 *)coll + ALIGN(coll->len, 2));
983 unsigned int rule_ptr = be16_to_cpu(rules_ptr[i]) << 2;
984 struct fwdb_rule *rule = (void *)((u8 *)db + rule_ptr);
985 struct ieee80211_reg_rule *rrule = ®dom->reg_rules[i];
987 rrule->freq_range.start_freq_khz = be32_to_cpu(rule->start);
988 rrule->freq_range.end_freq_khz = be32_to_cpu(rule->end);
989 rrule->freq_range.max_bandwidth_khz = be32_to_cpu(rule->max_bw);
991 rrule->power_rule.max_antenna_gain = 0;
992 rrule->power_rule.max_eirp = be16_to_cpu(rule->max_eirp);
995 if (rule->flags & FWDB_FLAG_NO_OFDM)
996 rrule->flags |= NL80211_RRF_NO_OFDM;
997 if (rule->flags & FWDB_FLAG_NO_OUTDOOR)
998 rrule->flags |= NL80211_RRF_NO_OUTDOOR;
999 if (rule->flags & FWDB_FLAG_DFS)
1000 rrule->flags |= NL80211_RRF_DFS;
1001 if (rule->flags & FWDB_FLAG_NO_IR)
1002 rrule->flags |= NL80211_RRF_NO_IR;
1003 if (rule->flags & FWDB_FLAG_AUTO_BW)
1004 rrule->flags |= NL80211_RRF_AUTO_BW;
1006 rrule->dfs_cac_ms = 0;
1008 /* handle optional data */
1009 if (rule->len >= offsetofend(struct fwdb_rule, cac_timeout))
1011 1000 * be16_to_cpu(rule->cac_timeout);
1012 if (rule->len >= offsetofend(struct fwdb_rule, wmm_ptr))
1013 set_wmm_rule(db, country, rule, rrule);
1016 return reg_schedule_apply(regdom);
1019 static int query_regdb(const char *alpha2)
1021 const struct fwdb_header *hdr = regdb;
1022 const struct fwdb_country *country;
1027 return PTR_ERR(regdb);
1029 country = &hdr->country[0];
1030 while (country->coll_ptr) {
1031 if (alpha2_equal(alpha2, country->alpha2))
1032 return regdb_query_country(regdb, country);
1039 static void regdb_fw_cb(const struct firmware *fw, void *context)
1042 bool restore = true;
1046 pr_info("failed to load regulatory.db\n");
1047 set_error = -ENODATA;
1048 } else if (!valid_regdb(fw->data, fw->size)) {
1049 pr_info("loaded regulatory.db is malformed or signature is missing/invalid\n");
1050 set_error = -EINVAL;
1054 if (regdb && !IS_ERR(regdb)) {
1055 /* negative case - a bug
1056 * positive case - can happen due to race in case of multiple cb's in
1057 * queue, due to usage of asynchronous callback
1059 * Either case, just restore and free new db.
1061 } else if (set_error) {
1062 regdb = ERR_PTR(set_error);
1064 db = kmemdup(fw->data, fw->size, GFP_KERNEL);
1067 restore = context && query_regdb(context);
1074 restore_regulatory_settings(true, false);
1080 release_firmware(fw);
1083 MODULE_FIRMWARE("regulatory.db");
1085 static int query_regdb_file(const char *alpha2)
1090 return query_regdb(alpha2);
1092 alpha2 = kmemdup(alpha2, 2, GFP_KERNEL);
1096 return request_firmware_nowait(THIS_MODULE, true, "regulatory.db",
1097 ®_pdev->dev, GFP_KERNEL,
1098 (void *)alpha2, regdb_fw_cb);
1101 int reg_reload_regdb(void)
1103 const struct firmware *fw;
1106 const struct ieee80211_regdomain *current_regdomain;
1107 struct regulatory_request *request;
1109 err = request_firmware(&fw, "regulatory.db", ®_pdev->dev);
1113 if (!valid_regdb(fw->data, fw->size)) {
1118 db = kmemdup(fw->data, fw->size, GFP_KERNEL);
1125 if (!IS_ERR_OR_NULL(regdb))
1129 /* reset regulatory domain */
1130 current_regdomain = get_cfg80211_regdom();
1132 request = kzalloc(sizeof(*request), GFP_KERNEL);
1138 request->wiphy_idx = WIPHY_IDX_INVALID;
1139 request->alpha2[0] = current_regdomain->alpha2[0];
1140 request->alpha2[1] = current_regdomain->alpha2[1];
1141 request->initiator = NL80211_REGDOM_SET_BY_CORE;
1142 request->user_reg_hint_type = NL80211_USER_REG_HINT_USER;
1144 reg_process_hint(request);
1149 release_firmware(fw);
1153 static bool reg_query_database(struct regulatory_request *request)
1155 if (query_regdb_file(request->alpha2) == 0)
1158 if (call_crda(request->alpha2) == 0)
1164 bool reg_is_valid_request(const char *alpha2)
1166 struct regulatory_request *lr = get_last_request();
1168 if (!lr || lr->processed)
1171 return alpha2_equal(lr->alpha2, alpha2);
1174 static const struct ieee80211_regdomain *reg_get_regdomain(struct wiphy *wiphy)
1176 struct regulatory_request *lr = get_last_request();
1179 * Follow the driver's regulatory domain, if present, unless a country
1180 * IE has been processed or a user wants to help complaince further
1182 if (lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE &&
1183 lr->initiator != NL80211_REGDOM_SET_BY_USER &&
1185 return get_wiphy_regdom(wiphy);
1187 return get_cfg80211_regdom();
1191 reg_get_max_bandwidth_from_range(const struct ieee80211_regdomain *rd,
1192 const struct ieee80211_reg_rule *rule)
1194 const struct ieee80211_freq_range *freq_range = &rule->freq_range;
1195 const struct ieee80211_freq_range *freq_range_tmp;
1196 const struct ieee80211_reg_rule *tmp;
1197 u32 start_freq, end_freq, idx, no;
1199 for (idx = 0; idx < rd->n_reg_rules; idx++)
1200 if (rule == &rd->reg_rules[idx])
1203 if (idx == rd->n_reg_rules)
1206 /* get start_freq */
1210 tmp = &rd->reg_rules[--no];
1211 freq_range_tmp = &tmp->freq_range;
1213 if (freq_range_tmp->end_freq_khz < freq_range->start_freq_khz)
1216 freq_range = freq_range_tmp;
1219 start_freq = freq_range->start_freq_khz;
1222 freq_range = &rule->freq_range;
1225 while (no < rd->n_reg_rules - 1) {
1226 tmp = &rd->reg_rules[++no];
1227 freq_range_tmp = &tmp->freq_range;
1229 if (freq_range_tmp->start_freq_khz > freq_range->end_freq_khz)
1232 freq_range = freq_range_tmp;
1235 end_freq = freq_range->end_freq_khz;
1237 return end_freq - start_freq;
1240 unsigned int reg_get_max_bandwidth(const struct ieee80211_regdomain *rd,
1241 const struct ieee80211_reg_rule *rule)
1243 unsigned int bw = reg_get_max_bandwidth_from_range(rd, rule);
1245 if (rule->flags & NL80211_RRF_NO_320MHZ)
1246 bw = min_t(unsigned int, bw, MHZ_TO_KHZ(160));
1247 if (rule->flags & NL80211_RRF_NO_160MHZ)
1248 bw = min_t(unsigned int, bw, MHZ_TO_KHZ(80));
1249 if (rule->flags & NL80211_RRF_NO_80MHZ)
1250 bw = min_t(unsigned int, bw, MHZ_TO_KHZ(40));
1253 * HT40+/HT40- limits are handled per-channel. Only limit BW if both
1256 if (rule->flags & NL80211_RRF_NO_HT40MINUS &&
1257 rule->flags & NL80211_RRF_NO_HT40PLUS)
1258 bw = min_t(unsigned int, bw, MHZ_TO_KHZ(20));
1263 /* Sanity check on a regulatory rule */
1264 static bool is_valid_reg_rule(const struct ieee80211_reg_rule *rule)
1266 const struct ieee80211_freq_range *freq_range = &rule->freq_range;
1269 if (freq_range->start_freq_khz <= 0 || freq_range->end_freq_khz <= 0)
1272 if (freq_range->start_freq_khz > freq_range->end_freq_khz)
1275 freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz;
1277 if (freq_range->end_freq_khz <= freq_range->start_freq_khz ||
1278 freq_range->max_bandwidth_khz > freq_diff)
1284 static bool is_valid_rd(const struct ieee80211_regdomain *rd)
1286 const struct ieee80211_reg_rule *reg_rule = NULL;
1289 if (!rd->n_reg_rules)
1292 if (WARN_ON(rd->n_reg_rules > NL80211_MAX_SUPP_REG_RULES))
1295 for (i = 0; i < rd->n_reg_rules; i++) {
1296 reg_rule = &rd->reg_rules[i];
1297 if (!is_valid_reg_rule(reg_rule))
1305 * freq_in_rule_band - tells us if a frequency is in a frequency band
1306 * @freq_range: frequency rule we want to query
1307 * @freq_khz: frequency we are inquiring about
1309 * This lets us know if a specific frequency rule is or is not relevant to
1310 * a specific frequency's band. Bands are device specific and artificial
1311 * definitions (the "2.4 GHz band", the "5 GHz band" and the "60GHz band"),
1312 * however it is safe for now to assume that a frequency rule should not be
1313 * part of a frequency's band if the start freq or end freq are off by more
1314 * than 2 GHz for the 2.4 and 5 GHz bands, and by more than 20 GHz for the
1316 * This resolution can be lowered and should be considered as we add
1317 * regulatory rule support for other "bands".
1319 static bool freq_in_rule_band(const struct ieee80211_freq_range *freq_range,
1322 #define ONE_GHZ_IN_KHZ 1000000
1324 * From 802.11ad: directional multi-gigabit (DMG):
1325 * Pertaining to operation in a frequency band containing a channel
1326 * with the Channel starting frequency above 45 GHz.
1328 u32 limit = freq_khz > 45 * ONE_GHZ_IN_KHZ ?
1329 20 * ONE_GHZ_IN_KHZ : 2 * ONE_GHZ_IN_KHZ;
1330 if (abs(freq_khz - freq_range->start_freq_khz) <= limit)
1332 if (abs(freq_khz - freq_range->end_freq_khz) <= limit)
1335 #undef ONE_GHZ_IN_KHZ
1339 * Later on we can perhaps use the more restrictive DFS
1340 * region but we don't have information for that yet so
1341 * for now simply disallow conflicts.
1343 static enum nl80211_dfs_regions
1344 reg_intersect_dfs_region(const enum nl80211_dfs_regions dfs_region1,
1345 const enum nl80211_dfs_regions dfs_region2)
1347 if (dfs_region1 != dfs_region2)
1348 return NL80211_DFS_UNSET;
1352 static void reg_wmm_rules_intersect(const struct ieee80211_wmm_ac *wmm_ac1,
1353 const struct ieee80211_wmm_ac *wmm_ac2,
1354 struct ieee80211_wmm_ac *intersect)
1356 intersect->cw_min = max_t(u16, wmm_ac1->cw_min, wmm_ac2->cw_min);
1357 intersect->cw_max = max_t(u16, wmm_ac1->cw_max, wmm_ac2->cw_max);
1358 intersect->cot = min_t(u16, wmm_ac1->cot, wmm_ac2->cot);
1359 intersect->aifsn = max_t(u8, wmm_ac1->aifsn, wmm_ac2->aifsn);
1363 * Helper for regdom_intersect(), this does the real
1364 * mathematical intersection fun
1366 static int reg_rules_intersect(const struct ieee80211_regdomain *rd1,
1367 const struct ieee80211_regdomain *rd2,
1368 const struct ieee80211_reg_rule *rule1,
1369 const struct ieee80211_reg_rule *rule2,
1370 struct ieee80211_reg_rule *intersected_rule)
1372 const struct ieee80211_freq_range *freq_range1, *freq_range2;
1373 struct ieee80211_freq_range *freq_range;
1374 const struct ieee80211_power_rule *power_rule1, *power_rule2;
1375 struct ieee80211_power_rule *power_rule;
1376 const struct ieee80211_wmm_rule *wmm_rule1, *wmm_rule2;
1377 struct ieee80211_wmm_rule *wmm_rule;
1378 u32 freq_diff, max_bandwidth1, max_bandwidth2;
1380 freq_range1 = &rule1->freq_range;
1381 freq_range2 = &rule2->freq_range;
1382 freq_range = &intersected_rule->freq_range;
1384 power_rule1 = &rule1->power_rule;
1385 power_rule2 = &rule2->power_rule;
1386 power_rule = &intersected_rule->power_rule;
1388 wmm_rule1 = &rule1->wmm_rule;
1389 wmm_rule2 = &rule2->wmm_rule;
1390 wmm_rule = &intersected_rule->wmm_rule;
1392 freq_range->start_freq_khz = max(freq_range1->start_freq_khz,
1393 freq_range2->start_freq_khz);
1394 freq_range->end_freq_khz = min(freq_range1->end_freq_khz,
1395 freq_range2->end_freq_khz);
1397 max_bandwidth1 = freq_range1->max_bandwidth_khz;
1398 max_bandwidth2 = freq_range2->max_bandwidth_khz;
1400 if (rule1->flags & NL80211_RRF_AUTO_BW)
1401 max_bandwidth1 = reg_get_max_bandwidth(rd1, rule1);
1402 if (rule2->flags & NL80211_RRF_AUTO_BW)
1403 max_bandwidth2 = reg_get_max_bandwidth(rd2, rule2);
1405 freq_range->max_bandwidth_khz = min(max_bandwidth1, max_bandwidth2);
1407 intersected_rule->flags = rule1->flags | rule2->flags;
1410 * In case NL80211_RRF_AUTO_BW requested for both rules
1411 * set AUTO_BW in intersected rule also. Next we will
1412 * calculate BW correctly in handle_channel function.
1413 * In other case remove AUTO_BW flag while we calculate
1414 * maximum bandwidth correctly and auto calculation is
1417 if ((rule1->flags & NL80211_RRF_AUTO_BW) &&
1418 (rule2->flags & NL80211_RRF_AUTO_BW))
1419 intersected_rule->flags |= NL80211_RRF_AUTO_BW;
1421 intersected_rule->flags &= ~NL80211_RRF_AUTO_BW;
1423 freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz;
1424 if (freq_range->max_bandwidth_khz > freq_diff)
1425 freq_range->max_bandwidth_khz = freq_diff;
1427 power_rule->max_eirp = min(power_rule1->max_eirp,
1428 power_rule2->max_eirp);
1429 power_rule->max_antenna_gain = min(power_rule1->max_antenna_gain,
1430 power_rule2->max_antenna_gain);
1432 intersected_rule->dfs_cac_ms = max(rule1->dfs_cac_ms,
1435 if (rule1->has_wmm && rule2->has_wmm) {
1438 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1439 reg_wmm_rules_intersect(&wmm_rule1->client[ac],
1440 &wmm_rule2->client[ac],
1441 &wmm_rule->client[ac]);
1442 reg_wmm_rules_intersect(&wmm_rule1->ap[ac],
1447 intersected_rule->has_wmm = true;
1448 } else if (rule1->has_wmm) {
1449 *wmm_rule = *wmm_rule1;
1450 intersected_rule->has_wmm = true;
1451 } else if (rule2->has_wmm) {
1452 *wmm_rule = *wmm_rule2;
1453 intersected_rule->has_wmm = true;
1455 intersected_rule->has_wmm = false;
1458 if (!is_valid_reg_rule(intersected_rule))
1464 /* check whether old rule contains new rule */
1465 static bool rule_contains(struct ieee80211_reg_rule *r1,
1466 struct ieee80211_reg_rule *r2)
1468 /* for simplicity, currently consider only same flags */
1469 if (r1->flags != r2->flags)
1472 /* verify r1 is more restrictive */
1473 if ((r1->power_rule.max_antenna_gain >
1474 r2->power_rule.max_antenna_gain) ||
1475 r1->power_rule.max_eirp > r2->power_rule.max_eirp)
1478 /* make sure r2's range is contained within r1 */
1479 if (r1->freq_range.start_freq_khz > r2->freq_range.start_freq_khz ||
1480 r1->freq_range.end_freq_khz < r2->freq_range.end_freq_khz)
1483 /* and finally verify that r1.max_bw >= r2.max_bw */
1484 if (r1->freq_range.max_bandwidth_khz <
1485 r2->freq_range.max_bandwidth_khz)
1491 /* add or extend current rules. do nothing if rule is already contained */
1492 static void add_rule(struct ieee80211_reg_rule *rule,
1493 struct ieee80211_reg_rule *reg_rules, u32 *n_rules)
1495 struct ieee80211_reg_rule *tmp_rule;
1498 for (i = 0; i < *n_rules; i++) {
1499 tmp_rule = ®_rules[i];
1500 /* rule is already contained - do nothing */
1501 if (rule_contains(tmp_rule, rule))
1504 /* extend rule if possible */
1505 if (rule_contains(rule, tmp_rule)) {
1506 memcpy(tmp_rule, rule, sizeof(*rule));
1511 memcpy(®_rules[*n_rules], rule, sizeof(*rule));
1516 * regdom_intersect - do the intersection between two regulatory domains
1517 * @rd1: first regulatory domain
1518 * @rd2: second regulatory domain
1520 * Use this function to get the intersection between two regulatory domains.
1521 * Once completed we will mark the alpha2 for the rd as intersected, "98",
1522 * as no one single alpha2 can represent this regulatory domain.
1524 * Returns a pointer to the regulatory domain structure which will hold the
1525 * resulting intersection of rules between rd1 and rd2. We will
1526 * kzalloc() this structure for you.
1528 static struct ieee80211_regdomain *
1529 regdom_intersect(const struct ieee80211_regdomain *rd1,
1530 const struct ieee80211_regdomain *rd2)
1534 unsigned int num_rules = 0;
1535 const struct ieee80211_reg_rule *rule1, *rule2;
1536 struct ieee80211_reg_rule intersected_rule;
1537 struct ieee80211_regdomain *rd;
1543 * First we get a count of the rules we'll need, then we actually
1544 * build them. This is to so we can malloc() and free() a
1545 * regdomain once. The reason we use reg_rules_intersect() here
1546 * is it will return -EINVAL if the rule computed makes no sense.
1547 * All rules that do check out OK are valid.
1550 for (x = 0; x < rd1->n_reg_rules; x++) {
1551 rule1 = &rd1->reg_rules[x];
1552 for (y = 0; y < rd2->n_reg_rules; y++) {
1553 rule2 = &rd2->reg_rules[y];
1554 if (!reg_rules_intersect(rd1, rd2, rule1, rule2,
1563 rd = kzalloc(struct_size(rd, reg_rules, num_rules), GFP_KERNEL);
1567 for (x = 0; x < rd1->n_reg_rules; x++) {
1568 rule1 = &rd1->reg_rules[x];
1569 for (y = 0; y < rd2->n_reg_rules; y++) {
1570 rule2 = &rd2->reg_rules[y];
1571 r = reg_rules_intersect(rd1, rd2, rule1, rule2,
1574 * No need to memset here the intersected rule here as
1575 * we're not using the stack anymore
1580 add_rule(&intersected_rule, rd->reg_rules,
1585 rd->alpha2[0] = '9';
1586 rd->alpha2[1] = '8';
1587 rd->dfs_region = reg_intersect_dfs_region(rd1->dfs_region,
1594 * XXX: add support for the rest of enum nl80211_reg_rule_flags, we may
1595 * want to just have the channel structure use these
1597 static u32 map_regdom_flags(u32 rd_flags)
1599 u32 channel_flags = 0;
1600 if (rd_flags & NL80211_RRF_NO_IR_ALL)
1601 channel_flags |= IEEE80211_CHAN_NO_IR;
1602 if (rd_flags & NL80211_RRF_DFS)
1603 channel_flags |= IEEE80211_CHAN_RADAR;
1604 if (rd_flags & NL80211_RRF_NO_OFDM)
1605 channel_flags |= IEEE80211_CHAN_NO_OFDM;
1606 if (rd_flags & NL80211_RRF_NO_OUTDOOR)
1607 channel_flags |= IEEE80211_CHAN_INDOOR_ONLY;
1608 if (rd_flags & NL80211_RRF_IR_CONCURRENT)
1609 channel_flags |= IEEE80211_CHAN_IR_CONCURRENT;
1610 if (rd_flags & NL80211_RRF_NO_HT40MINUS)
1611 channel_flags |= IEEE80211_CHAN_NO_HT40MINUS;
1612 if (rd_flags & NL80211_RRF_NO_HT40PLUS)
1613 channel_flags |= IEEE80211_CHAN_NO_HT40PLUS;
1614 if (rd_flags & NL80211_RRF_NO_80MHZ)
1615 channel_flags |= IEEE80211_CHAN_NO_80MHZ;
1616 if (rd_flags & NL80211_RRF_NO_160MHZ)
1617 channel_flags |= IEEE80211_CHAN_NO_160MHZ;
1618 if (rd_flags & NL80211_RRF_NO_HE)
1619 channel_flags |= IEEE80211_CHAN_NO_HE;
1620 if (rd_flags & NL80211_RRF_NO_320MHZ)
1621 channel_flags |= IEEE80211_CHAN_NO_320MHZ;
1622 return channel_flags;
1625 static const struct ieee80211_reg_rule *
1626 freq_reg_info_regd(u32 center_freq,
1627 const struct ieee80211_regdomain *regd, u32 bw)
1630 bool band_rule_found = false;
1631 bool bw_fits = false;
1634 return ERR_PTR(-EINVAL);
1636 for (i = 0; i < regd->n_reg_rules; i++) {
1637 const struct ieee80211_reg_rule *rr;
1638 const struct ieee80211_freq_range *fr = NULL;
1640 rr = ®d->reg_rules[i];
1641 fr = &rr->freq_range;
1644 * We only need to know if one frequency rule was
1645 * in center_freq's band, that's enough, so let's
1646 * not overwrite it once found
1648 if (!band_rule_found)
1649 band_rule_found = freq_in_rule_band(fr, center_freq);
1651 bw_fits = cfg80211_does_bw_fit_range(fr, center_freq, bw);
1653 if (band_rule_found && bw_fits)
1657 if (!band_rule_found)
1658 return ERR_PTR(-ERANGE);
1660 return ERR_PTR(-EINVAL);
1663 static const struct ieee80211_reg_rule *
1664 __freq_reg_info(struct wiphy *wiphy, u32 center_freq, u32 min_bw)
1666 const struct ieee80211_regdomain *regd = reg_get_regdomain(wiphy);
1667 static const u32 bws[] = {0, 1, 2, 4, 5, 8, 10, 16, 20};
1668 const struct ieee80211_reg_rule *reg_rule = ERR_PTR(-ERANGE);
1669 int i = ARRAY_SIZE(bws) - 1;
1672 for (bw = MHZ_TO_KHZ(bws[i]); bw >= min_bw; bw = MHZ_TO_KHZ(bws[i--])) {
1673 reg_rule = freq_reg_info_regd(center_freq, regd, bw);
1674 if (!IS_ERR(reg_rule))
1681 const struct ieee80211_reg_rule *freq_reg_info(struct wiphy *wiphy,
1684 u32 min_bw = center_freq < MHZ_TO_KHZ(1000) ? 1 : 20;
1686 return __freq_reg_info(wiphy, center_freq, MHZ_TO_KHZ(min_bw));
1688 EXPORT_SYMBOL(freq_reg_info);
1690 const char *reg_initiator_name(enum nl80211_reg_initiator initiator)
1692 switch (initiator) {
1693 case NL80211_REGDOM_SET_BY_CORE:
1695 case NL80211_REGDOM_SET_BY_USER:
1697 case NL80211_REGDOM_SET_BY_DRIVER:
1699 case NL80211_REGDOM_SET_BY_COUNTRY_IE:
1700 return "country element";
1706 EXPORT_SYMBOL(reg_initiator_name);
1708 static uint32_t reg_rule_to_chan_bw_flags(const struct ieee80211_regdomain *regd,
1709 const struct ieee80211_reg_rule *reg_rule,
1710 const struct ieee80211_channel *chan)
1712 const struct ieee80211_freq_range *freq_range = NULL;
1713 u32 max_bandwidth_khz, center_freq_khz, bw_flags = 0;
1714 bool is_s1g = chan->band == NL80211_BAND_S1GHZ;
1716 freq_range = ®_rule->freq_range;
1718 max_bandwidth_khz = freq_range->max_bandwidth_khz;
1719 center_freq_khz = ieee80211_channel_to_khz(chan);
1720 /* Check if auto calculation requested */
1721 if (reg_rule->flags & NL80211_RRF_AUTO_BW)
1722 max_bandwidth_khz = reg_get_max_bandwidth(regd, reg_rule);
1724 /* If we get a reg_rule we can assume that at least 5Mhz fit */
1725 if (!cfg80211_does_bw_fit_range(freq_range,
1728 bw_flags |= IEEE80211_CHAN_NO_10MHZ;
1729 if (!cfg80211_does_bw_fit_range(freq_range,
1732 bw_flags |= IEEE80211_CHAN_NO_20MHZ;
1735 /* S1G is strict about non overlapping channels. We can
1736 * calculate which bandwidth is allowed per channel by finding
1737 * the largest bandwidth which cleanly divides the freq_range.
1740 int ch_bw = max_bandwidth_khz;
1743 edge_offset = (center_freq_khz - ch_bw / 2) -
1744 freq_range->start_freq_khz;
1745 if (edge_offset % ch_bw == 0) {
1746 switch (KHZ_TO_MHZ(ch_bw)) {
1748 bw_flags |= IEEE80211_CHAN_1MHZ;
1751 bw_flags |= IEEE80211_CHAN_2MHZ;
1754 bw_flags |= IEEE80211_CHAN_4MHZ;
1757 bw_flags |= IEEE80211_CHAN_8MHZ;
1760 bw_flags |= IEEE80211_CHAN_16MHZ;
1763 /* If we got here, no bandwidths fit on
1764 * this frequency, ie. band edge.
1766 bw_flags |= IEEE80211_CHAN_DISABLED;
1774 if (max_bandwidth_khz < MHZ_TO_KHZ(10))
1775 bw_flags |= IEEE80211_CHAN_NO_10MHZ;
1776 if (max_bandwidth_khz < MHZ_TO_KHZ(20))
1777 bw_flags |= IEEE80211_CHAN_NO_20MHZ;
1778 if (max_bandwidth_khz < MHZ_TO_KHZ(40))
1779 bw_flags |= IEEE80211_CHAN_NO_HT40;
1780 if (max_bandwidth_khz < MHZ_TO_KHZ(80))
1781 bw_flags |= IEEE80211_CHAN_NO_80MHZ;
1782 if (max_bandwidth_khz < MHZ_TO_KHZ(160))
1783 bw_flags |= IEEE80211_CHAN_NO_160MHZ;
1784 if (max_bandwidth_khz < MHZ_TO_KHZ(320))
1785 bw_flags |= IEEE80211_CHAN_NO_320MHZ;
1790 static void handle_channel_single_rule(struct wiphy *wiphy,
1791 enum nl80211_reg_initiator initiator,
1792 struct ieee80211_channel *chan,
1794 struct regulatory_request *lr,
1795 struct wiphy *request_wiphy,
1796 const struct ieee80211_reg_rule *reg_rule)
1799 const struct ieee80211_power_rule *power_rule = NULL;
1800 const struct ieee80211_regdomain *regd;
1802 regd = reg_get_regdomain(wiphy);
1804 power_rule = ®_rule->power_rule;
1805 bw_flags = reg_rule_to_chan_bw_flags(regd, reg_rule, chan);
1807 if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER &&
1808 request_wiphy && request_wiphy == wiphy &&
1809 request_wiphy->regulatory_flags & REGULATORY_STRICT_REG) {
1811 * This guarantees the driver's requested regulatory domain
1812 * will always be used as a base for further regulatory
1815 chan->flags = chan->orig_flags =
1816 map_regdom_flags(reg_rule->flags) | bw_flags;
1817 chan->max_antenna_gain = chan->orig_mag =
1818 (int) MBI_TO_DBI(power_rule->max_antenna_gain);
1819 chan->max_reg_power = chan->max_power = chan->orig_mpwr =
1820 (int) MBM_TO_DBM(power_rule->max_eirp);
1822 if (chan->flags & IEEE80211_CHAN_RADAR) {
1823 chan->dfs_cac_ms = IEEE80211_DFS_MIN_CAC_TIME_MS;
1824 if (reg_rule->dfs_cac_ms)
1825 chan->dfs_cac_ms = reg_rule->dfs_cac_ms;
1831 chan->dfs_state = NL80211_DFS_USABLE;
1832 chan->dfs_state_entered = jiffies;
1834 chan->beacon_found = false;
1835 chan->flags = flags | bw_flags | map_regdom_flags(reg_rule->flags);
1836 chan->max_antenna_gain =
1837 min_t(int, chan->orig_mag,
1838 MBI_TO_DBI(power_rule->max_antenna_gain));
1839 chan->max_reg_power = (int) MBM_TO_DBM(power_rule->max_eirp);
1841 if (chan->flags & IEEE80211_CHAN_RADAR) {
1842 if (reg_rule->dfs_cac_ms)
1843 chan->dfs_cac_ms = reg_rule->dfs_cac_ms;
1845 chan->dfs_cac_ms = IEEE80211_DFS_MIN_CAC_TIME_MS;
1848 if (chan->orig_mpwr) {
1850 * Devices that use REGULATORY_COUNTRY_IE_FOLLOW_POWER
1851 * will always follow the passed country IE power settings.
1853 if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE &&
1854 wiphy->regulatory_flags & REGULATORY_COUNTRY_IE_FOLLOW_POWER)
1855 chan->max_power = chan->max_reg_power;
1857 chan->max_power = min(chan->orig_mpwr,
1858 chan->max_reg_power);
1860 chan->max_power = chan->max_reg_power;
1863 static void handle_channel_adjacent_rules(struct wiphy *wiphy,
1864 enum nl80211_reg_initiator initiator,
1865 struct ieee80211_channel *chan,
1867 struct regulatory_request *lr,
1868 struct wiphy *request_wiphy,
1869 const struct ieee80211_reg_rule *rrule1,
1870 const struct ieee80211_reg_rule *rrule2,
1871 struct ieee80211_freq_range *comb_range)
1875 const struct ieee80211_power_rule *power_rule1 = NULL;
1876 const struct ieee80211_power_rule *power_rule2 = NULL;
1877 const struct ieee80211_regdomain *regd;
1879 regd = reg_get_regdomain(wiphy);
1881 power_rule1 = &rrule1->power_rule;
1882 power_rule2 = &rrule2->power_rule;
1883 bw_flags1 = reg_rule_to_chan_bw_flags(regd, rrule1, chan);
1884 bw_flags2 = reg_rule_to_chan_bw_flags(regd, rrule2, chan);
1886 if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER &&
1887 request_wiphy && request_wiphy == wiphy &&
1888 request_wiphy->regulatory_flags & REGULATORY_STRICT_REG) {
1889 /* This guarantees the driver's requested regulatory domain
1890 * will always be used as a base for further regulatory
1894 map_regdom_flags(rrule1->flags) |
1895 map_regdom_flags(rrule2->flags) |
1898 chan->orig_flags = chan->flags;
1899 chan->max_antenna_gain =
1900 min_t(int, MBI_TO_DBI(power_rule1->max_antenna_gain),
1901 MBI_TO_DBI(power_rule2->max_antenna_gain));
1902 chan->orig_mag = chan->max_antenna_gain;
1903 chan->max_reg_power =
1904 min_t(int, MBM_TO_DBM(power_rule1->max_eirp),
1905 MBM_TO_DBM(power_rule2->max_eirp));
1906 chan->max_power = chan->max_reg_power;
1907 chan->orig_mpwr = chan->max_reg_power;
1909 if (chan->flags & IEEE80211_CHAN_RADAR) {
1910 chan->dfs_cac_ms = IEEE80211_DFS_MIN_CAC_TIME_MS;
1911 if (rrule1->dfs_cac_ms || rrule2->dfs_cac_ms)
1912 chan->dfs_cac_ms = max_t(unsigned int,
1914 rrule2->dfs_cac_ms);
1920 chan->dfs_state = NL80211_DFS_USABLE;
1921 chan->dfs_state_entered = jiffies;
1923 chan->beacon_found = false;
1924 chan->flags = flags | bw_flags1 | bw_flags2 |
1925 map_regdom_flags(rrule1->flags) |
1926 map_regdom_flags(rrule2->flags);
1928 /* reg_rule_to_chan_bw_flags may forbids 10 and forbids 20 MHz
1929 * (otherwise no adj. rule case), recheck therefore
1931 if (cfg80211_does_bw_fit_range(comb_range,
1932 ieee80211_channel_to_khz(chan),
1934 chan->flags &= ~IEEE80211_CHAN_NO_10MHZ;
1935 if (cfg80211_does_bw_fit_range(comb_range,
1936 ieee80211_channel_to_khz(chan),
1938 chan->flags &= ~IEEE80211_CHAN_NO_20MHZ;
1940 chan->max_antenna_gain =
1941 min_t(int, chan->orig_mag,
1943 MBI_TO_DBI(power_rule1->max_antenna_gain),
1944 MBI_TO_DBI(power_rule2->max_antenna_gain)));
1945 chan->max_reg_power = min_t(int,
1946 MBM_TO_DBM(power_rule1->max_eirp),
1947 MBM_TO_DBM(power_rule2->max_eirp));
1949 if (chan->flags & IEEE80211_CHAN_RADAR) {
1950 if (rrule1->dfs_cac_ms || rrule2->dfs_cac_ms)
1951 chan->dfs_cac_ms = max_t(unsigned int,
1953 rrule2->dfs_cac_ms);
1955 chan->dfs_cac_ms = IEEE80211_DFS_MIN_CAC_TIME_MS;
1958 if (chan->orig_mpwr) {
1959 /* Devices that use REGULATORY_COUNTRY_IE_FOLLOW_POWER
1960 * will always follow the passed country IE power settings.
1962 if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE &&
1963 wiphy->regulatory_flags & REGULATORY_COUNTRY_IE_FOLLOW_POWER)
1964 chan->max_power = chan->max_reg_power;
1966 chan->max_power = min(chan->orig_mpwr,
1967 chan->max_reg_power);
1969 chan->max_power = chan->max_reg_power;
1973 /* Note that right now we assume the desired channel bandwidth
1974 * is always 20 MHz for each individual channel (HT40 uses 20 MHz
1975 * per channel, the primary and the extension channel).
1977 static void handle_channel(struct wiphy *wiphy,
1978 enum nl80211_reg_initiator initiator,
1979 struct ieee80211_channel *chan)
1981 const u32 orig_chan_freq = ieee80211_channel_to_khz(chan);
1982 struct regulatory_request *lr = get_last_request();
1983 struct wiphy *request_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx);
1984 const struct ieee80211_reg_rule *rrule = NULL;
1985 const struct ieee80211_reg_rule *rrule1 = NULL;
1986 const struct ieee80211_reg_rule *rrule2 = NULL;
1988 u32 flags = chan->orig_flags;
1990 rrule = freq_reg_info(wiphy, orig_chan_freq);
1991 if (IS_ERR(rrule)) {
1992 /* check for adjacent match, therefore get rules for
1993 * chan - 20 MHz and chan + 20 MHz and test
1994 * if reg rules are adjacent
1996 rrule1 = freq_reg_info(wiphy,
1997 orig_chan_freq - MHZ_TO_KHZ(20));
1998 rrule2 = freq_reg_info(wiphy,
1999 orig_chan_freq + MHZ_TO_KHZ(20));
2000 if (!IS_ERR(rrule1) && !IS_ERR(rrule2)) {
2001 struct ieee80211_freq_range comb_range;
2003 if (rrule1->freq_range.end_freq_khz !=
2004 rrule2->freq_range.start_freq_khz)
2007 comb_range.start_freq_khz =
2008 rrule1->freq_range.start_freq_khz;
2009 comb_range.end_freq_khz =
2010 rrule2->freq_range.end_freq_khz;
2011 comb_range.max_bandwidth_khz =
2013 rrule1->freq_range.max_bandwidth_khz,
2014 rrule2->freq_range.max_bandwidth_khz);
2016 if (!cfg80211_does_bw_fit_range(&comb_range,
2021 handle_channel_adjacent_rules(wiphy, initiator, chan,
2022 flags, lr, request_wiphy,
2029 /* We will disable all channels that do not match our
2030 * received regulatory rule unless the hint is coming
2031 * from a Country IE and the Country IE had no information
2032 * about a band. The IEEE 802.11 spec allows for an AP
2033 * to send only a subset of the regulatory rules allowed,
2034 * so an AP in the US that only supports 2.4 GHz may only send
2035 * a country IE with information for the 2.4 GHz band
2036 * while 5 GHz is still supported.
2038 if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE &&
2039 PTR_ERR(rrule) == -ERANGE)
2042 if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER &&
2043 request_wiphy && request_wiphy == wiphy &&
2044 request_wiphy->regulatory_flags & REGULATORY_STRICT_REG) {
2045 pr_debug("Disabling freq %d.%03d MHz for good\n",
2046 chan->center_freq, chan->freq_offset);
2047 chan->orig_flags |= IEEE80211_CHAN_DISABLED;
2048 chan->flags = chan->orig_flags;
2050 pr_debug("Disabling freq %d.%03d MHz\n",
2051 chan->center_freq, chan->freq_offset);
2052 chan->flags |= IEEE80211_CHAN_DISABLED;
2057 handle_channel_single_rule(wiphy, initiator, chan, flags, lr,
2058 request_wiphy, rrule);
2061 static void handle_band(struct wiphy *wiphy,
2062 enum nl80211_reg_initiator initiator,
2063 struct ieee80211_supported_band *sband)
2070 for (i = 0; i < sband->n_channels; i++)
2071 handle_channel(wiphy, initiator, &sband->channels[i]);
2074 static bool reg_request_cell_base(struct regulatory_request *request)
2076 if (request->initiator != NL80211_REGDOM_SET_BY_USER)
2078 return request->user_reg_hint_type == NL80211_USER_REG_HINT_CELL_BASE;
2081 bool reg_last_request_cell_base(void)
2083 return reg_request_cell_base(get_last_request());
2086 #ifdef CONFIG_CFG80211_REG_CELLULAR_HINTS
2087 /* Core specific check */
2088 static enum reg_request_treatment
2089 reg_ignore_cell_hint(struct regulatory_request *pending_request)
2091 struct regulatory_request *lr = get_last_request();
2093 if (!reg_num_devs_support_basehint)
2094 return REG_REQ_IGNORE;
2096 if (reg_request_cell_base(lr) &&
2097 !regdom_changes(pending_request->alpha2))
2098 return REG_REQ_ALREADY_SET;
2103 /* Device specific check */
2104 static bool reg_dev_ignore_cell_hint(struct wiphy *wiphy)
2106 return !(wiphy->features & NL80211_FEATURE_CELL_BASE_REG_HINTS);
2109 static enum reg_request_treatment
2110 reg_ignore_cell_hint(struct regulatory_request *pending_request)
2112 return REG_REQ_IGNORE;
2115 static bool reg_dev_ignore_cell_hint(struct wiphy *wiphy)
2121 static bool wiphy_strict_alpha2_regd(struct wiphy *wiphy)
2123 if (wiphy->regulatory_flags & REGULATORY_STRICT_REG &&
2124 !(wiphy->regulatory_flags & REGULATORY_CUSTOM_REG))
2129 static bool ignore_reg_update(struct wiphy *wiphy,
2130 enum nl80211_reg_initiator initiator)
2132 struct regulatory_request *lr = get_last_request();
2134 if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED)
2138 pr_debug("Ignoring regulatory request set by %s since last_request is not set\n",
2139 reg_initiator_name(initiator));
2143 if (initiator == NL80211_REGDOM_SET_BY_CORE &&
2144 wiphy->regulatory_flags & REGULATORY_CUSTOM_REG) {
2145 pr_debug("Ignoring regulatory request set by %s since the driver uses its own custom regulatory domain\n",
2146 reg_initiator_name(initiator));
2151 * wiphy->regd will be set once the device has its own
2152 * desired regulatory domain set
2154 if (wiphy_strict_alpha2_regd(wiphy) && !wiphy->regd &&
2155 initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE &&
2156 !is_world_regdom(lr->alpha2)) {
2157 pr_debug("Ignoring regulatory request set by %s since the driver requires its own regulatory domain to be set first\n",
2158 reg_initiator_name(initiator));
2162 if (reg_request_cell_base(lr))
2163 return reg_dev_ignore_cell_hint(wiphy);
2168 static bool reg_is_world_roaming(struct wiphy *wiphy)
2170 const struct ieee80211_regdomain *cr = get_cfg80211_regdom();
2171 const struct ieee80211_regdomain *wr = get_wiphy_regdom(wiphy);
2172 struct regulatory_request *lr = get_last_request();
2174 if (is_world_regdom(cr->alpha2) || (wr && is_world_regdom(wr->alpha2)))
2177 if (lr && lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE &&
2178 wiphy->regulatory_flags & REGULATORY_CUSTOM_REG)
2184 static void handle_reg_beacon(struct wiphy *wiphy, unsigned int chan_idx,
2185 struct reg_beacon *reg_beacon)
2187 struct ieee80211_supported_band *sband;
2188 struct ieee80211_channel *chan;
2189 bool channel_changed = false;
2190 struct ieee80211_channel chan_before;
2192 sband = wiphy->bands[reg_beacon->chan.band];
2193 chan = &sband->channels[chan_idx];
2195 if (likely(!ieee80211_channel_equal(chan, ®_beacon->chan)))
2198 if (chan->beacon_found)
2201 chan->beacon_found = true;
2203 if (!reg_is_world_roaming(wiphy))
2206 if (wiphy->regulatory_flags & REGULATORY_DISABLE_BEACON_HINTS)
2209 chan_before = *chan;
2211 if (chan->flags & IEEE80211_CHAN_NO_IR) {
2212 chan->flags &= ~IEEE80211_CHAN_NO_IR;
2213 channel_changed = true;
2216 if (channel_changed)
2217 nl80211_send_beacon_hint_event(wiphy, &chan_before, chan);
2221 * Called when a scan on a wiphy finds a beacon on
2224 static void wiphy_update_new_beacon(struct wiphy *wiphy,
2225 struct reg_beacon *reg_beacon)
2228 struct ieee80211_supported_band *sband;
2230 if (!wiphy->bands[reg_beacon->chan.band])
2233 sband = wiphy->bands[reg_beacon->chan.band];
2235 for (i = 0; i < sband->n_channels; i++)
2236 handle_reg_beacon(wiphy, i, reg_beacon);
2240 * Called upon reg changes or a new wiphy is added
2242 static void wiphy_update_beacon_reg(struct wiphy *wiphy)
2245 struct ieee80211_supported_band *sband;
2246 struct reg_beacon *reg_beacon;
2248 list_for_each_entry(reg_beacon, ®_beacon_list, list) {
2249 if (!wiphy->bands[reg_beacon->chan.band])
2251 sband = wiphy->bands[reg_beacon->chan.band];
2252 for (i = 0; i < sband->n_channels; i++)
2253 handle_reg_beacon(wiphy, i, reg_beacon);
2257 /* Reap the advantages of previously found beacons */
2258 static void reg_process_beacons(struct wiphy *wiphy)
2261 * Means we are just firing up cfg80211, so no beacons would
2262 * have been processed yet.
2266 wiphy_update_beacon_reg(wiphy);
2269 static bool is_ht40_allowed(struct ieee80211_channel *chan)
2273 if (chan->flags & IEEE80211_CHAN_DISABLED)
2275 /* This would happen when regulatory rules disallow HT40 completely */
2276 if ((chan->flags & IEEE80211_CHAN_NO_HT40) == IEEE80211_CHAN_NO_HT40)
2281 static void reg_process_ht_flags_channel(struct wiphy *wiphy,
2282 struct ieee80211_channel *channel)
2284 struct ieee80211_supported_band *sband = wiphy->bands[channel->band];
2285 struct ieee80211_channel *channel_before = NULL, *channel_after = NULL;
2286 const struct ieee80211_regdomain *regd;
2290 if (!is_ht40_allowed(channel)) {
2291 channel->flags |= IEEE80211_CHAN_NO_HT40;
2296 * We need to ensure the extension channels exist to
2297 * be able to use HT40- or HT40+, this finds them (or not)
2299 for (i = 0; i < sband->n_channels; i++) {
2300 struct ieee80211_channel *c = &sband->channels[i];
2302 if (c->center_freq == (channel->center_freq - 20))
2304 if (c->center_freq == (channel->center_freq + 20))
2309 regd = get_wiphy_regdom(wiphy);
2311 const struct ieee80211_reg_rule *reg_rule =
2312 freq_reg_info_regd(MHZ_TO_KHZ(channel->center_freq),
2313 regd, MHZ_TO_KHZ(20));
2315 if (!IS_ERR(reg_rule))
2316 flags = reg_rule->flags;
2320 * Please note that this assumes target bandwidth is 20 MHz,
2321 * if that ever changes we also need to change the below logic
2322 * to include that as well.
2324 if (!is_ht40_allowed(channel_before) ||
2325 flags & NL80211_RRF_NO_HT40MINUS)
2326 channel->flags |= IEEE80211_CHAN_NO_HT40MINUS;
2328 channel->flags &= ~IEEE80211_CHAN_NO_HT40MINUS;
2330 if (!is_ht40_allowed(channel_after) ||
2331 flags & NL80211_RRF_NO_HT40PLUS)
2332 channel->flags |= IEEE80211_CHAN_NO_HT40PLUS;
2334 channel->flags &= ~IEEE80211_CHAN_NO_HT40PLUS;
2337 static void reg_process_ht_flags_band(struct wiphy *wiphy,
2338 struct ieee80211_supported_band *sband)
2345 for (i = 0; i < sband->n_channels; i++)
2346 reg_process_ht_flags_channel(wiphy, &sband->channels[i]);
2349 static void reg_process_ht_flags(struct wiphy *wiphy)
2351 enum nl80211_band band;
2356 for (band = 0; band < NUM_NL80211_BANDS; band++)
2357 reg_process_ht_flags_band(wiphy, wiphy->bands[band]);
2360 static void reg_call_notifier(struct wiphy *wiphy,
2361 struct regulatory_request *request)
2363 if (wiphy->reg_notifier)
2364 wiphy->reg_notifier(wiphy, request);
2367 static bool reg_wdev_chan_valid(struct wiphy *wiphy, struct wireless_dev *wdev)
2369 struct cfg80211_chan_def chandef = {};
2370 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
2371 enum nl80211_iftype iftype;
2375 iftype = wdev->iftype;
2377 /* make sure the interface is active */
2378 if (!wdev->netdev || !netif_running(wdev->netdev))
2379 goto wdev_inactive_unlock;
2382 case NL80211_IFTYPE_AP:
2383 case NL80211_IFTYPE_P2P_GO:
2384 case NL80211_IFTYPE_MESH_POINT:
2385 if (!wdev->beacon_interval)
2386 goto wdev_inactive_unlock;
2387 chandef = wdev->chandef;
2389 case NL80211_IFTYPE_ADHOC:
2390 if (!wdev->ssid_len)
2391 goto wdev_inactive_unlock;
2392 chandef = wdev->chandef;
2394 case NL80211_IFTYPE_STATION:
2395 case NL80211_IFTYPE_P2P_CLIENT:
2396 if (!wdev->current_bss ||
2397 !wdev->current_bss->pub.channel)
2398 goto wdev_inactive_unlock;
2400 if (!rdev->ops->get_channel ||
2401 rdev_get_channel(rdev, wdev, &chandef))
2402 cfg80211_chandef_create(&chandef,
2403 wdev->current_bss->pub.channel,
2404 NL80211_CHAN_NO_HT);
2406 case NL80211_IFTYPE_MONITOR:
2407 case NL80211_IFTYPE_AP_VLAN:
2408 case NL80211_IFTYPE_P2P_DEVICE:
2409 /* no enforcement required */
2412 /* others not implemented for now */
2420 case NL80211_IFTYPE_AP:
2421 case NL80211_IFTYPE_P2P_GO:
2422 case NL80211_IFTYPE_ADHOC:
2423 case NL80211_IFTYPE_MESH_POINT:
2425 ret = cfg80211_reg_can_beacon_relax(wiphy, &chandef, iftype);
2426 wiphy_unlock(wiphy);
2429 case NL80211_IFTYPE_STATION:
2430 case NL80211_IFTYPE_P2P_CLIENT:
2431 return cfg80211_chandef_usable(wiphy, &chandef,
2432 IEEE80211_CHAN_DISABLED);
2439 wdev_inactive_unlock:
2444 static void reg_leave_invalid_chans(struct wiphy *wiphy)
2446 struct wireless_dev *wdev;
2447 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
2451 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list)
2452 if (!reg_wdev_chan_valid(wiphy, wdev))
2453 cfg80211_leave(rdev, wdev);
2456 static void reg_check_chans_work(struct work_struct *work)
2458 struct cfg80211_registered_device *rdev;
2460 pr_debug("Verifying active interfaces after reg change\n");
2463 list_for_each_entry(rdev, &cfg80211_rdev_list, list)
2464 if (!(rdev->wiphy.regulatory_flags &
2465 REGULATORY_IGNORE_STALE_KICKOFF))
2466 reg_leave_invalid_chans(&rdev->wiphy);
2471 static void reg_check_channels(void)
2474 * Give usermode a chance to do something nicer (move to another
2475 * channel, orderly disconnection), before forcing a disconnection.
2477 mod_delayed_work(system_power_efficient_wq,
2479 msecs_to_jiffies(REG_ENFORCE_GRACE_MS));
2482 static void wiphy_update_regulatory(struct wiphy *wiphy,
2483 enum nl80211_reg_initiator initiator)
2485 enum nl80211_band band;
2486 struct regulatory_request *lr = get_last_request();
2488 if (ignore_reg_update(wiphy, initiator)) {
2490 * Regulatory updates set by CORE are ignored for custom
2491 * regulatory cards. Let us notify the changes to the driver,
2492 * as some drivers used this to restore its orig_* reg domain.
2494 if (initiator == NL80211_REGDOM_SET_BY_CORE &&
2495 wiphy->regulatory_flags & REGULATORY_CUSTOM_REG &&
2496 !(wiphy->regulatory_flags &
2497 REGULATORY_WIPHY_SELF_MANAGED))
2498 reg_call_notifier(wiphy, lr);
2502 lr->dfs_region = get_cfg80211_regdom()->dfs_region;
2504 for (band = 0; band < NUM_NL80211_BANDS; band++)
2505 handle_band(wiphy, initiator, wiphy->bands[band]);
2507 reg_process_beacons(wiphy);
2508 reg_process_ht_flags(wiphy);
2509 reg_call_notifier(wiphy, lr);
2512 static void update_all_wiphy_regulatory(enum nl80211_reg_initiator initiator)
2514 struct cfg80211_registered_device *rdev;
2515 struct wiphy *wiphy;
2519 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
2520 wiphy = &rdev->wiphy;
2521 wiphy_update_regulatory(wiphy, initiator);
2524 reg_check_channels();
2527 static void handle_channel_custom(struct wiphy *wiphy,
2528 struct ieee80211_channel *chan,
2529 const struct ieee80211_regdomain *regd,
2533 const struct ieee80211_reg_rule *reg_rule = NULL;
2534 const struct ieee80211_power_rule *power_rule = NULL;
2535 u32 bw, center_freq_khz;
2537 center_freq_khz = ieee80211_channel_to_khz(chan);
2538 for (bw = MHZ_TO_KHZ(20); bw >= min_bw; bw = bw / 2) {
2539 reg_rule = freq_reg_info_regd(center_freq_khz, regd, bw);
2540 if (!IS_ERR(reg_rule))
2544 if (IS_ERR_OR_NULL(reg_rule)) {
2545 pr_debug("Disabling freq %d.%03d MHz as custom regd has no rule that fits it\n",
2546 chan->center_freq, chan->freq_offset);
2547 if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) {
2548 chan->flags |= IEEE80211_CHAN_DISABLED;
2550 chan->orig_flags |= IEEE80211_CHAN_DISABLED;
2551 chan->flags = chan->orig_flags;
2556 power_rule = ®_rule->power_rule;
2557 bw_flags = reg_rule_to_chan_bw_flags(regd, reg_rule, chan);
2559 chan->dfs_state_entered = jiffies;
2560 chan->dfs_state = NL80211_DFS_USABLE;
2562 chan->beacon_found = false;
2564 if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED)
2565 chan->flags = chan->orig_flags | bw_flags |
2566 map_regdom_flags(reg_rule->flags);
2568 chan->flags |= map_regdom_flags(reg_rule->flags) | bw_flags;
2570 chan->max_antenna_gain = (int) MBI_TO_DBI(power_rule->max_antenna_gain);
2571 chan->max_reg_power = chan->max_power =
2572 (int) MBM_TO_DBM(power_rule->max_eirp);
2574 if (chan->flags & IEEE80211_CHAN_RADAR) {
2575 if (reg_rule->dfs_cac_ms)
2576 chan->dfs_cac_ms = reg_rule->dfs_cac_ms;
2578 chan->dfs_cac_ms = IEEE80211_DFS_MIN_CAC_TIME_MS;
2581 chan->max_power = chan->max_reg_power;
2584 static void handle_band_custom(struct wiphy *wiphy,
2585 struct ieee80211_supported_band *sband,
2586 const struct ieee80211_regdomain *regd)
2594 * We currently assume that you always want at least 20 MHz,
2595 * otherwise channel 12 might get enabled if this rule is
2596 * compatible to US, which permits 2402 - 2472 MHz.
2598 for (i = 0; i < sband->n_channels; i++)
2599 handle_channel_custom(wiphy, &sband->channels[i], regd,
2603 /* Used by drivers prior to wiphy registration */
2604 void wiphy_apply_custom_regulatory(struct wiphy *wiphy,
2605 const struct ieee80211_regdomain *regd)
2607 const struct ieee80211_regdomain *new_regd, *tmp;
2608 enum nl80211_band band;
2609 unsigned int bands_set = 0;
2611 WARN(!(wiphy->regulatory_flags & REGULATORY_CUSTOM_REG),
2612 "wiphy should have REGULATORY_CUSTOM_REG\n");
2613 wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG;
2615 for (band = 0; band < NUM_NL80211_BANDS; band++) {
2616 if (!wiphy->bands[band])
2618 handle_band_custom(wiphy, wiphy->bands[band], regd);
2623 * no point in calling this if it won't have any effect
2624 * on your device's supported bands.
2626 WARN_ON(!bands_set);
2627 new_regd = reg_copy_regd(regd);
2628 if (IS_ERR(new_regd))
2634 tmp = get_wiphy_regdom(wiphy);
2635 rcu_assign_pointer(wiphy->regd, new_regd);
2636 rcu_free_regdom(tmp);
2638 wiphy_unlock(wiphy);
2641 EXPORT_SYMBOL(wiphy_apply_custom_regulatory);
2643 static void reg_set_request_processed(void)
2645 bool need_more_processing = false;
2646 struct regulatory_request *lr = get_last_request();
2648 lr->processed = true;
2650 spin_lock(®_requests_lock);
2651 if (!list_empty(®_requests_list))
2652 need_more_processing = true;
2653 spin_unlock(®_requests_lock);
2655 cancel_crda_timeout();
2657 if (need_more_processing)
2658 schedule_work(®_work);
2662 * reg_process_hint_core - process core regulatory requests
2663 * @core_request: a pending core regulatory request
2665 * The wireless subsystem can use this function to process
2666 * a regulatory request issued by the regulatory core.
2668 static enum reg_request_treatment
2669 reg_process_hint_core(struct regulatory_request *core_request)
2671 if (reg_query_database(core_request)) {
2672 core_request->intersect = false;
2673 core_request->processed = false;
2674 reg_update_last_request(core_request);
2678 return REG_REQ_IGNORE;
2681 static enum reg_request_treatment
2682 __reg_process_hint_user(struct regulatory_request *user_request)
2684 struct regulatory_request *lr = get_last_request();
2686 if (reg_request_cell_base(user_request))
2687 return reg_ignore_cell_hint(user_request);
2689 if (reg_request_cell_base(lr))
2690 return REG_REQ_IGNORE;
2692 if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE)
2693 return REG_REQ_INTERSECT;
2695 * If the user knows better the user should set the regdom
2696 * to their country before the IE is picked up
2698 if (lr->initiator == NL80211_REGDOM_SET_BY_USER &&
2700 return REG_REQ_IGNORE;
2702 * Process user requests only after previous user/driver/core
2703 * requests have been processed
2705 if ((lr->initiator == NL80211_REGDOM_SET_BY_CORE ||
2706 lr->initiator == NL80211_REGDOM_SET_BY_DRIVER ||
2707 lr->initiator == NL80211_REGDOM_SET_BY_USER) &&
2708 regdom_changes(lr->alpha2))
2709 return REG_REQ_IGNORE;
2711 if (!regdom_changes(user_request->alpha2))
2712 return REG_REQ_ALREADY_SET;
2718 * reg_process_hint_user - process user regulatory requests
2719 * @user_request: a pending user regulatory request
2721 * The wireless subsystem can use this function to process
2722 * a regulatory request initiated by userspace.
2724 static enum reg_request_treatment
2725 reg_process_hint_user(struct regulatory_request *user_request)
2727 enum reg_request_treatment treatment;
2729 treatment = __reg_process_hint_user(user_request);
2730 if (treatment == REG_REQ_IGNORE ||
2731 treatment == REG_REQ_ALREADY_SET)
2732 return REG_REQ_IGNORE;
2734 user_request->intersect = treatment == REG_REQ_INTERSECT;
2735 user_request->processed = false;
2737 if (reg_query_database(user_request)) {
2738 reg_update_last_request(user_request);
2739 user_alpha2[0] = user_request->alpha2[0];
2740 user_alpha2[1] = user_request->alpha2[1];
2744 return REG_REQ_IGNORE;
2747 static enum reg_request_treatment
2748 __reg_process_hint_driver(struct regulatory_request *driver_request)
2750 struct regulatory_request *lr = get_last_request();
2752 if (lr->initiator == NL80211_REGDOM_SET_BY_CORE) {
2753 if (regdom_changes(driver_request->alpha2))
2755 return REG_REQ_ALREADY_SET;
2759 * This would happen if you unplug and plug your card
2760 * back in or if you add a new device for which the previously
2761 * loaded card also agrees on the regulatory domain.
2763 if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER &&
2764 !regdom_changes(driver_request->alpha2))
2765 return REG_REQ_ALREADY_SET;
2767 return REG_REQ_INTERSECT;
2771 * reg_process_hint_driver - process driver regulatory requests
2772 * @wiphy: the wireless device for the regulatory request
2773 * @driver_request: a pending driver regulatory request
2775 * The wireless subsystem can use this function to process
2776 * a regulatory request issued by an 802.11 driver.
2778 * Returns one of the different reg request treatment values.
2780 static enum reg_request_treatment
2781 reg_process_hint_driver(struct wiphy *wiphy,
2782 struct regulatory_request *driver_request)
2784 const struct ieee80211_regdomain *regd, *tmp;
2785 enum reg_request_treatment treatment;
2787 treatment = __reg_process_hint_driver(driver_request);
2789 switch (treatment) {
2792 case REG_REQ_IGNORE:
2793 return REG_REQ_IGNORE;
2794 case REG_REQ_INTERSECT:
2795 case REG_REQ_ALREADY_SET:
2796 regd = reg_copy_regd(get_cfg80211_regdom());
2798 return REG_REQ_IGNORE;
2800 tmp = get_wiphy_regdom(wiphy);
2803 rcu_assign_pointer(wiphy->regd, regd);
2804 wiphy_unlock(wiphy);
2805 rcu_free_regdom(tmp);
2809 driver_request->intersect = treatment == REG_REQ_INTERSECT;
2810 driver_request->processed = false;
2813 * Since CRDA will not be called in this case as we already
2814 * have applied the requested regulatory domain before we just
2815 * inform userspace we have processed the request
2817 if (treatment == REG_REQ_ALREADY_SET) {
2818 nl80211_send_reg_change_event(driver_request);
2819 reg_update_last_request(driver_request);
2820 reg_set_request_processed();
2821 return REG_REQ_ALREADY_SET;
2824 if (reg_query_database(driver_request)) {
2825 reg_update_last_request(driver_request);
2829 return REG_REQ_IGNORE;
2832 static enum reg_request_treatment
2833 __reg_process_hint_country_ie(struct wiphy *wiphy,
2834 struct regulatory_request *country_ie_request)
2836 struct wiphy *last_wiphy = NULL;
2837 struct regulatory_request *lr = get_last_request();
2839 if (reg_request_cell_base(lr)) {
2840 /* Trust a Cell base station over the AP's country IE */
2841 if (regdom_changes(country_ie_request->alpha2))
2842 return REG_REQ_IGNORE;
2843 return REG_REQ_ALREADY_SET;
2845 if (wiphy->regulatory_flags & REGULATORY_COUNTRY_IE_IGNORE)
2846 return REG_REQ_IGNORE;
2849 if (unlikely(!is_an_alpha2(country_ie_request->alpha2)))
2852 if (lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE)
2855 last_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx);
2857 if (last_wiphy != wiphy) {
2859 * Two cards with two APs claiming different
2860 * Country IE alpha2s. We could
2861 * intersect them, but that seems unlikely
2862 * to be correct. Reject second one for now.
2864 if (regdom_changes(country_ie_request->alpha2))
2865 return REG_REQ_IGNORE;
2866 return REG_REQ_ALREADY_SET;
2869 if (regdom_changes(country_ie_request->alpha2))
2871 return REG_REQ_ALREADY_SET;
2875 * reg_process_hint_country_ie - process regulatory requests from country IEs
2876 * @wiphy: the wireless device for the regulatory request
2877 * @country_ie_request: a regulatory request from a country IE
2879 * The wireless subsystem can use this function to process
2880 * a regulatory request issued by a country Information Element.
2882 * Returns one of the different reg request treatment values.
2884 static enum reg_request_treatment
2885 reg_process_hint_country_ie(struct wiphy *wiphy,
2886 struct regulatory_request *country_ie_request)
2888 enum reg_request_treatment treatment;
2890 treatment = __reg_process_hint_country_ie(wiphy, country_ie_request);
2892 switch (treatment) {
2895 case REG_REQ_IGNORE:
2896 return REG_REQ_IGNORE;
2897 case REG_REQ_ALREADY_SET:
2898 reg_free_request(country_ie_request);
2899 return REG_REQ_ALREADY_SET;
2900 case REG_REQ_INTERSECT:
2902 * This doesn't happen yet, not sure we
2903 * ever want to support it for this case.
2905 WARN_ONCE(1, "Unexpected intersection for country elements");
2906 return REG_REQ_IGNORE;
2909 country_ie_request->intersect = false;
2910 country_ie_request->processed = false;
2912 if (reg_query_database(country_ie_request)) {
2913 reg_update_last_request(country_ie_request);
2917 return REG_REQ_IGNORE;
2920 bool reg_dfs_domain_same(struct wiphy *wiphy1, struct wiphy *wiphy2)
2922 const struct ieee80211_regdomain *wiphy1_regd = NULL;
2923 const struct ieee80211_regdomain *wiphy2_regd = NULL;
2924 const struct ieee80211_regdomain *cfg80211_regd = NULL;
2925 bool dfs_domain_same;
2929 cfg80211_regd = rcu_dereference(cfg80211_regdomain);
2930 wiphy1_regd = rcu_dereference(wiphy1->regd);
2932 wiphy1_regd = cfg80211_regd;
2934 wiphy2_regd = rcu_dereference(wiphy2->regd);
2936 wiphy2_regd = cfg80211_regd;
2938 dfs_domain_same = wiphy1_regd->dfs_region == wiphy2_regd->dfs_region;
2942 return dfs_domain_same;
2945 static void reg_copy_dfs_chan_state(struct ieee80211_channel *dst_chan,
2946 struct ieee80211_channel *src_chan)
2948 if (!(dst_chan->flags & IEEE80211_CHAN_RADAR) ||
2949 !(src_chan->flags & IEEE80211_CHAN_RADAR))
2952 if (dst_chan->flags & IEEE80211_CHAN_DISABLED ||
2953 src_chan->flags & IEEE80211_CHAN_DISABLED)
2956 if (src_chan->center_freq == dst_chan->center_freq &&
2957 dst_chan->dfs_state == NL80211_DFS_USABLE) {
2958 dst_chan->dfs_state = src_chan->dfs_state;
2959 dst_chan->dfs_state_entered = src_chan->dfs_state_entered;
2963 static void wiphy_share_dfs_chan_state(struct wiphy *dst_wiphy,
2964 struct wiphy *src_wiphy)
2966 struct ieee80211_supported_band *src_sband, *dst_sband;
2967 struct ieee80211_channel *src_chan, *dst_chan;
2970 if (!reg_dfs_domain_same(dst_wiphy, src_wiphy))
2973 for (band = 0; band < NUM_NL80211_BANDS; band++) {
2974 dst_sband = dst_wiphy->bands[band];
2975 src_sband = src_wiphy->bands[band];
2976 if (!dst_sband || !src_sband)
2979 for (i = 0; i < dst_sband->n_channels; i++) {
2980 dst_chan = &dst_sband->channels[i];
2981 for (j = 0; j < src_sband->n_channels; j++) {
2982 src_chan = &src_sband->channels[j];
2983 reg_copy_dfs_chan_state(dst_chan, src_chan);
2989 static void wiphy_all_share_dfs_chan_state(struct wiphy *wiphy)
2991 struct cfg80211_registered_device *rdev;
2995 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
2996 if (wiphy == &rdev->wiphy)
2998 wiphy_share_dfs_chan_state(wiphy, &rdev->wiphy);
3002 /* This processes *all* regulatory hints */
3003 static void reg_process_hint(struct regulatory_request *reg_request)
3005 struct wiphy *wiphy = NULL;
3006 enum reg_request_treatment treatment;
3007 enum nl80211_reg_initiator initiator = reg_request->initiator;
3009 if (reg_request->wiphy_idx != WIPHY_IDX_INVALID)
3010 wiphy = wiphy_idx_to_wiphy(reg_request->wiphy_idx);
3012 switch (initiator) {
3013 case NL80211_REGDOM_SET_BY_CORE:
3014 treatment = reg_process_hint_core(reg_request);
3016 case NL80211_REGDOM_SET_BY_USER:
3017 treatment = reg_process_hint_user(reg_request);
3019 case NL80211_REGDOM_SET_BY_DRIVER:
3022 treatment = reg_process_hint_driver(wiphy, reg_request);
3024 case NL80211_REGDOM_SET_BY_COUNTRY_IE:
3027 treatment = reg_process_hint_country_ie(wiphy, reg_request);
3030 WARN(1, "invalid initiator %d\n", initiator);
3034 if (treatment == REG_REQ_IGNORE)
3037 WARN(treatment != REG_REQ_OK && treatment != REG_REQ_ALREADY_SET,
3038 "unexpected treatment value %d\n", treatment);
3040 /* This is required so that the orig_* parameters are saved.
3041 * NOTE: treatment must be set for any case that reaches here!
3043 if (treatment == REG_REQ_ALREADY_SET && wiphy &&
3044 wiphy->regulatory_flags & REGULATORY_STRICT_REG) {
3045 wiphy_update_regulatory(wiphy, initiator);
3046 wiphy_all_share_dfs_chan_state(wiphy);
3047 reg_check_channels();
3053 reg_free_request(reg_request);
3056 static void notify_self_managed_wiphys(struct regulatory_request *request)
3058 struct cfg80211_registered_device *rdev;
3059 struct wiphy *wiphy;
3061 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
3062 wiphy = &rdev->wiphy;
3063 if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED &&
3064 request->initiator == NL80211_REGDOM_SET_BY_USER)
3065 reg_call_notifier(wiphy, request);
3070 * Processes regulatory hints, this is all the NL80211_REGDOM_SET_BY_*
3071 * Regulatory hints come on a first come first serve basis and we
3072 * must process each one atomically.
3074 static void reg_process_pending_hints(void)
3076 struct regulatory_request *reg_request, *lr;
3078 lr = get_last_request();
3080 /* When last_request->processed becomes true this will be rescheduled */
3081 if (lr && !lr->processed) {
3082 pr_debug("Pending regulatory request, waiting for it to be processed...\n");
3086 spin_lock(®_requests_lock);
3088 if (list_empty(®_requests_list)) {
3089 spin_unlock(®_requests_lock);
3093 reg_request = list_first_entry(®_requests_list,
3094 struct regulatory_request,
3096 list_del_init(®_request->list);
3098 spin_unlock(®_requests_lock);
3100 notify_self_managed_wiphys(reg_request);
3102 reg_process_hint(reg_request);
3104 lr = get_last_request();
3106 spin_lock(®_requests_lock);
3107 if (!list_empty(®_requests_list) && lr && lr->processed)
3108 schedule_work(®_work);
3109 spin_unlock(®_requests_lock);
3112 /* Processes beacon hints -- this has nothing to do with country IEs */
3113 static void reg_process_pending_beacon_hints(void)
3115 struct cfg80211_registered_device *rdev;
3116 struct reg_beacon *pending_beacon, *tmp;
3118 /* This goes through the _pending_ beacon list */
3119 spin_lock_bh(®_pending_beacons_lock);
3121 list_for_each_entry_safe(pending_beacon, tmp,
3122 ®_pending_beacons, list) {
3123 list_del_init(&pending_beacon->list);
3125 /* Applies the beacon hint to current wiphys */
3126 list_for_each_entry(rdev, &cfg80211_rdev_list, list)
3127 wiphy_update_new_beacon(&rdev->wiphy, pending_beacon);
3129 /* Remembers the beacon hint for new wiphys or reg changes */
3130 list_add_tail(&pending_beacon->list, ®_beacon_list);
3133 spin_unlock_bh(®_pending_beacons_lock);
3136 static void reg_process_self_managed_hint(struct wiphy *wiphy)
3138 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
3139 const struct ieee80211_regdomain *tmp;
3140 const struct ieee80211_regdomain *regd;
3141 enum nl80211_band band;
3142 struct regulatory_request request = {};
3145 lockdep_assert_wiphy(wiphy);
3147 spin_lock(®_requests_lock);
3148 regd = rdev->requested_regd;
3149 rdev->requested_regd = NULL;
3150 spin_unlock(®_requests_lock);
3155 tmp = get_wiphy_regdom(wiphy);
3156 rcu_assign_pointer(wiphy->regd, regd);
3157 rcu_free_regdom(tmp);
3159 for (band = 0; band < NUM_NL80211_BANDS; band++)
3160 handle_band_custom(wiphy, wiphy->bands[band], regd);
3162 reg_process_ht_flags(wiphy);
3164 request.wiphy_idx = get_wiphy_idx(wiphy);
3165 request.alpha2[0] = regd->alpha2[0];
3166 request.alpha2[1] = regd->alpha2[1];
3167 request.initiator = NL80211_REGDOM_SET_BY_DRIVER;
3169 nl80211_send_wiphy_reg_change_event(&request);
3172 static void reg_process_self_managed_hints(void)
3174 struct cfg80211_registered_device *rdev;
3178 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
3179 wiphy_lock(&rdev->wiphy);
3180 reg_process_self_managed_hint(&rdev->wiphy);
3181 wiphy_unlock(&rdev->wiphy);
3184 reg_check_channels();
3187 static void reg_todo(struct work_struct *work)
3190 reg_process_pending_hints();
3191 reg_process_pending_beacon_hints();
3192 reg_process_self_managed_hints();
3196 static void queue_regulatory_request(struct regulatory_request *request)
3198 request->alpha2[0] = toupper(request->alpha2[0]);
3199 request->alpha2[1] = toupper(request->alpha2[1]);
3201 spin_lock(®_requests_lock);
3202 list_add_tail(&request->list, ®_requests_list);
3203 spin_unlock(®_requests_lock);
3205 schedule_work(®_work);
3209 * Core regulatory hint -- happens during cfg80211_init()
3210 * and when we restore regulatory settings.
3212 static int regulatory_hint_core(const char *alpha2)
3214 struct regulatory_request *request;
3216 request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL);
3220 request->alpha2[0] = alpha2[0];
3221 request->alpha2[1] = alpha2[1];
3222 request->initiator = NL80211_REGDOM_SET_BY_CORE;
3223 request->wiphy_idx = WIPHY_IDX_INVALID;
3225 queue_regulatory_request(request);
3231 int regulatory_hint_user(const char *alpha2,
3232 enum nl80211_user_reg_hint_type user_reg_hint_type)
3234 struct regulatory_request *request;
3236 if (WARN_ON(!alpha2))
3239 if (!is_world_regdom(alpha2) && !is_an_alpha2(alpha2))
3242 request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL);
3246 request->wiphy_idx = WIPHY_IDX_INVALID;
3247 request->alpha2[0] = alpha2[0];
3248 request->alpha2[1] = alpha2[1];
3249 request->initiator = NL80211_REGDOM_SET_BY_USER;
3250 request->user_reg_hint_type = user_reg_hint_type;
3252 /* Allow calling CRDA again */
3253 reset_crda_timeouts();
3255 queue_regulatory_request(request);
3260 int regulatory_hint_indoor(bool is_indoor, u32 portid)
3262 spin_lock(®_indoor_lock);
3264 /* It is possible that more than one user space process is trying to
3265 * configure the indoor setting. To handle such cases, clear the indoor
3266 * setting in case that some process does not think that the device
3267 * is operating in an indoor environment. In addition, if a user space
3268 * process indicates that it is controlling the indoor setting, save its
3269 * portid, i.e., make it the owner.
3271 reg_is_indoor = is_indoor;
3272 if (reg_is_indoor) {
3273 if (!reg_is_indoor_portid)
3274 reg_is_indoor_portid = portid;
3276 reg_is_indoor_portid = 0;
3279 spin_unlock(®_indoor_lock);
3282 reg_check_channels();
3287 void regulatory_netlink_notify(u32 portid)
3289 spin_lock(®_indoor_lock);
3291 if (reg_is_indoor_portid != portid) {
3292 spin_unlock(®_indoor_lock);
3296 reg_is_indoor = false;
3297 reg_is_indoor_portid = 0;
3299 spin_unlock(®_indoor_lock);
3301 reg_check_channels();
3305 int regulatory_hint(struct wiphy *wiphy, const char *alpha2)
3307 struct regulatory_request *request;
3309 if (WARN_ON(!alpha2 || !wiphy))
3312 wiphy->regulatory_flags &= ~REGULATORY_CUSTOM_REG;
3314 request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL);
3318 request->wiphy_idx = get_wiphy_idx(wiphy);
3320 request->alpha2[0] = alpha2[0];
3321 request->alpha2[1] = alpha2[1];
3322 request->initiator = NL80211_REGDOM_SET_BY_DRIVER;
3324 /* Allow calling CRDA again */
3325 reset_crda_timeouts();
3327 queue_regulatory_request(request);
3331 EXPORT_SYMBOL(regulatory_hint);
3333 void regulatory_hint_country_ie(struct wiphy *wiphy, enum nl80211_band band,
3334 const u8 *country_ie, u8 country_ie_len)
3337 enum environment_cap env = ENVIRON_ANY;
3338 struct regulatory_request *request = NULL, *lr;
3340 /* IE len must be evenly divisible by 2 */
3341 if (country_ie_len & 0x01)
3344 if (country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
3347 request = kzalloc(sizeof(*request), GFP_KERNEL);
3351 alpha2[0] = country_ie[0];
3352 alpha2[1] = country_ie[1];
3354 if (country_ie[2] == 'I')
3355 env = ENVIRON_INDOOR;
3356 else if (country_ie[2] == 'O')
3357 env = ENVIRON_OUTDOOR;
3360 lr = get_last_request();
3366 * We will run this only upon a successful connection on cfg80211.
3367 * We leave conflict resolution to the workqueue, where can hold
3370 if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE &&
3371 lr->wiphy_idx != WIPHY_IDX_INVALID)
3374 request->wiphy_idx = get_wiphy_idx(wiphy);
3375 request->alpha2[0] = alpha2[0];
3376 request->alpha2[1] = alpha2[1];
3377 request->initiator = NL80211_REGDOM_SET_BY_COUNTRY_IE;
3378 request->country_ie_env = env;
3380 /* Allow calling CRDA again */
3381 reset_crda_timeouts();
3383 queue_regulatory_request(request);
3390 static void restore_alpha2(char *alpha2, bool reset_user)
3392 /* indicates there is no alpha2 to consider for restoration */
3396 /* The user setting has precedence over the module parameter */
3397 if (is_user_regdom_saved()) {
3398 /* Unless we're asked to ignore it and reset it */
3400 pr_debug("Restoring regulatory settings including user preference\n");
3401 user_alpha2[0] = '9';
3402 user_alpha2[1] = '7';
3405 * If we're ignoring user settings, we still need to
3406 * check the module parameter to ensure we put things
3407 * back as they were for a full restore.
3409 if (!is_world_regdom(ieee80211_regdom)) {
3410 pr_debug("Keeping preference on module parameter ieee80211_regdom: %c%c\n",
3411 ieee80211_regdom[0], ieee80211_regdom[1]);
3412 alpha2[0] = ieee80211_regdom[0];
3413 alpha2[1] = ieee80211_regdom[1];
3416 pr_debug("Restoring regulatory settings while preserving user preference for: %c%c\n",
3417 user_alpha2[0], user_alpha2[1]);
3418 alpha2[0] = user_alpha2[0];
3419 alpha2[1] = user_alpha2[1];
3421 } else if (!is_world_regdom(ieee80211_regdom)) {
3422 pr_debug("Keeping preference on module parameter ieee80211_regdom: %c%c\n",
3423 ieee80211_regdom[0], ieee80211_regdom[1]);
3424 alpha2[0] = ieee80211_regdom[0];
3425 alpha2[1] = ieee80211_regdom[1];
3427 pr_debug("Restoring regulatory settings\n");
3430 static void restore_custom_reg_settings(struct wiphy *wiphy)
3432 struct ieee80211_supported_band *sband;
3433 enum nl80211_band band;
3434 struct ieee80211_channel *chan;
3437 for (band = 0; band < NUM_NL80211_BANDS; band++) {
3438 sband = wiphy->bands[band];
3441 for (i = 0; i < sband->n_channels; i++) {
3442 chan = &sband->channels[i];
3443 chan->flags = chan->orig_flags;
3444 chan->max_antenna_gain = chan->orig_mag;
3445 chan->max_power = chan->orig_mpwr;
3446 chan->beacon_found = false;
3452 * Restoring regulatory settings involves ignoring any
3453 * possibly stale country IE information and user regulatory
3454 * settings if so desired, this includes any beacon hints
3455 * learned as we could have traveled outside to another country
3456 * after disconnection. To restore regulatory settings we do
3457 * exactly what we did at bootup:
3459 * - send a core regulatory hint
3460 * - send a user regulatory hint if applicable
3462 * Device drivers that send a regulatory hint for a specific country
3463 * keep their own regulatory domain on wiphy->regd so that does
3464 * not need to be remembered.
3466 static void restore_regulatory_settings(bool reset_user, bool cached)
3469 char world_alpha2[2];
3470 struct reg_beacon *reg_beacon, *btmp;
3471 LIST_HEAD(tmp_reg_req_list);
3472 struct cfg80211_registered_device *rdev;
3477 * Clear the indoor setting in case that it is not controlled by user
3478 * space, as otherwise there is no guarantee that the device is still
3479 * operating in an indoor environment.
3481 spin_lock(®_indoor_lock);
3482 if (reg_is_indoor && !reg_is_indoor_portid) {
3483 reg_is_indoor = false;
3484 reg_check_channels();
3486 spin_unlock(®_indoor_lock);
3488 reset_regdomains(true, &world_regdom);
3489 restore_alpha2(alpha2, reset_user);
3492 * If there's any pending requests we simply
3493 * stash them to a temporary pending queue and
3494 * add then after we've restored regulatory
3497 spin_lock(®_requests_lock);
3498 list_splice_tail_init(®_requests_list, &tmp_reg_req_list);
3499 spin_unlock(®_requests_lock);
3501 /* Clear beacon hints */
3502 spin_lock_bh(®_pending_beacons_lock);
3503 list_for_each_entry_safe(reg_beacon, btmp, ®_pending_beacons, list) {
3504 list_del(®_beacon->list);
3507 spin_unlock_bh(®_pending_beacons_lock);
3509 list_for_each_entry_safe(reg_beacon, btmp, ®_beacon_list, list) {
3510 list_del(®_beacon->list);
3514 /* First restore to the basic regulatory settings */
3515 world_alpha2[0] = cfg80211_world_regdom->alpha2[0];
3516 world_alpha2[1] = cfg80211_world_regdom->alpha2[1];
3518 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
3519 if (rdev->wiphy.regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED)
3521 if (rdev->wiphy.regulatory_flags & REGULATORY_CUSTOM_REG)
3522 restore_custom_reg_settings(&rdev->wiphy);
3525 if (cached && (!is_an_alpha2(alpha2) ||
3526 !IS_ERR_OR_NULL(cfg80211_user_regdom))) {
3527 reset_regdomains(false, cfg80211_world_regdom);
3528 update_all_wiphy_regulatory(NL80211_REGDOM_SET_BY_CORE);
3529 print_regdomain(get_cfg80211_regdom());
3530 nl80211_send_reg_change_event(&core_request_world);
3531 reg_set_request_processed();
3533 if (is_an_alpha2(alpha2) &&
3534 !regulatory_hint_user(alpha2, NL80211_USER_REG_HINT_USER)) {
3535 struct regulatory_request *ureq;
3537 spin_lock(®_requests_lock);
3538 ureq = list_last_entry(®_requests_list,
3539 struct regulatory_request,
3541 list_del(&ureq->list);
3542 spin_unlock(®_requests_lock);
3544 notify_self_managed_wiphys(ureq);
3545 reg_update_last_request(ureq);
3546 set_regdom(reg_copy_regd(cfg80211_user_regdom),
3547 REGD_SOURCE_CACHED);
3550 regulatory_hint_core(world_alpha2);
3553 * This restores the ieee80211_regdom module parameter
3554 * preference or the last user requested regulatory
3555 * settings, user regulatory settings takes precedence.
3557 if (is_an_alpha2(alpha2))
3558 regulatory_hint_user(alpha2, NL80211_USER_REG_HINT_USER);
3561 spin_lock(®_requests_lock);
3562 list_splice_tail_init(&tmp_reg_req_list, ®_requests_list);
3563 spin_unlock(®_requests_lock);
3565 pr_debug("Kicking the queue\n");
3567 schedule_work(®_work);
3570 static bool is_wiphy_all_set_reg_flag(enum ieee80211_regulatory_flags flag)
3572 struct cfg80211_registered_device *rdev;
3573 struct wireless_dev *wdev;
3575 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
3576 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
3578 if (!(wdev->wiphy->regulatory_flags & flag)) {
3589 void regulatory_hint_disconnect(void)
3591 /* Restore of regulatory settings is not required when wiphy(s)
3592 * ignore IE from connected access point but clearance of beacon hints
3593 * is required when wiphy(s) supports beacon hints.
3595 if (is_wiphy_all_set_reg_flag(REGULATORY_COUNTRY_IE_IGNORE)) {
3596 struct reg_beacon *reg_beacon, *btmp;
3598 if (is_wiphy_all_set_reg_flag(REGULATORY_DISABLE_BEACON_HINTS))
3601 spin_lock_bh(®_pending_beacons_lock);
3602 list_for_each_entry_safe(reg_beacon, btmp,
3603 ®_pending_beacons, list) {
3604 list_del(®_beacon->list);
3607 spin_unlock_bh(®_pending_beacons_lock);
3609 list_for_each_entry_safe(reg_beacon, btmp,
3610 ®_beacon_list, list) {
3611 list_del(®_beacon->list);
3618 pr_debug("All devices are disconnected, going to restore regulatory settings\n");
3619 restore_regulatory_settings(false, true);
3622 static bool freq_is_chan_12_13_14(u32 freq)
3624 if (freq == ieee80211_channel_to_frequency(12, NL80211_BAND_2GHZ) ||
3625 freq == ieee80211_channel_to_frequency(13, NL80211_BAND_2GHZ) ||
3626 freq == ieee80211_channel_to_frequency(14, NL80211_BAND_2GHZ))
3631 static bool pending_reg_beacon(struct ieee80211_channel *beacon_chan)
3633 struct reg_beacon *pending_beacon;
3635 list_for_each_entry(pending_beacon, ®_pending_beacons, list)
3636 if (ieee80211_channel_equal(beacon_chan,
3637 &pending_beacon->chan))
3642 int regulatory_hint_found_beacon(struct wiphy *wiphy,
3643 struct ieee80211_channel *beacon_chan,
3646 struct reg_beacon *reg_beacon;
3649 if (beacon_chan->beacon_found ||
3650 beacon_chan->flags & IEEE80211_CHAN_RADAR ||
3651 (beacon_chan->band == NL80211_BAND_2GHZ &&
3652 !freq_is_chan_12_13_14(beacon_chan->center_freq)))
3655 spin_lock_bh(®_pending_beacons_lock);
3656 processing = pending_reg_beacon(beacon_chan);
3657 spin_unlock_bh(®_pending_beacons_lock);
3662 reg_beacon = kzalloc(sizeof(struct reg_beacon), gfp);
3666 pr_debug("Found new beacon on frequency: %d.%03d MHz (Ch %d) on %s\n",
3667 beacon_chan->center_freq, beacon_chan->freq_offset,
3668 ieee80211_freq_khz_to_channel(
3669 ieee80211_channel_to_khz(beacon_chan)),
3672 memcpy(®_beacon->chan, beacon_chan,
3673 sizeof(struct ieee80211_channel));
3676 * Since we can be called from BH or and non-BH context
3677 * we must use spin_lock_bh()
3679 spin_lock_bh(®_pending_beacons_lock);
3680 list_add_tail(®_beacon->list, ®_pending_beacons);
3681 spin_unlock_bh(®_pending_beacons_lock);
3683 schedule_work(®_work);
3688 static void print_rd_rules(const struct ieee80211_regdomain *rd)
3691 const struct ieee80211_reg_rule *reg_rule = NULL;
3692 const struct ieee80211_freq_range *freq_range = NULL;
3693 const struct ieee80211_power_rule *power_rule = NULL;
3694 char bw[32], cac_time[32];
3696 pr_debug(" (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp), (dfs_cac_time)\n");
3698 for (i = 0; i < rd->n_reg_rules; i++) {
3699 reg_rule = &rd->reg_rules[i];
3700 freq_range = ®_rule->freq_range;
3701 power_rule = ®_rule->power_rule;
3703 if (reg_rule->flags & NL80211_RRF_AUTO_BW)
3704 snprintf(bw, sizeof(bw), "%d KHz, %u KHz AUTO",
3705 freq_range->max_bandwidth_khz,
3706 reg_get_max_bandwidth(rd, reg_rule));
3708 snprintf(bw, sizeof(bw), "%d KHz",
3709 freq_range->max_bandwidth_khz);
3711 if (reg_rule->flags & NL80211_RRF_DFS)
3712 scnprintf(cac_time, sizeof(cac_time), "%u s",
3713 reg_rule->dfs_cac_ms/1000);
3715 scnprintf(cac_time, sizeof(cac_time), "N/A");
3719 * There may not be documentation for max antenna gain
3720 * in certain regions
3722 if (power_rule->max_antenna_gain)
3723 pr_debug(" (%d KHz - %d KHz @ %s), (%d mBi, %d mBm), (%s)\n",
3724 freq_range->start_freq_khz,
3725 freq_range->end_freq_khz,
3727 power_rule->max_antenna_gain,
3728 power_rule->max_eirp,
3731 pr_debug(" (%d KHz - %d KHz @ %s), (N/A, %d mBm), (%s)\n",
3732 freq_range->start_freq_khz,
3733 freq_range->end_freq_khz,
3735 power_rule->max_eirp,
3740 bool reg_supported_dfs_region(enum nl80211_dfs_regions dfs_region)
3742 switch (dfs_region) {
3743 case NL80211_DFS_UNSET:
3744 case NL80211_DFS_FCC:
3745 case NL80211_DFS_ETSI:
3746 case NL80211_DFS_JP:
3749 pr_debug("Ignoring unknown DFS master region: %d\n", dfs_region);
3754 static void print_regdomain(const struct ieee80211_regdomain *rd)
3756 struct regulatory_request *lr = get_last_request();
3758 if (is_intersected_alpha2(rd->alpha2)) {
3759 if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) {
3760 struct cfg80211_registered_device *rdev;
3761 rdev = cfg80211_rdev_by_wiphy_idx(lr->wiphy_idx);
3763 pr_debug("Current regulatory domain updated by AP to: %c%c\n",
3764 rdev->country_ie_alpha2[0],
3765 rdev->country_ie_alpha2[1]);
3767 pr_debug("Current regulatory domain intersected:\n");
3769 pr_debug("Current regulatory domain intersected:\n");
3770 } else if (is_world_regdom(rd->alpha2)) {
3771 pr_debug("World regulatory domain updated:\n");
3773 if (is_unknown_alpha2(rd->alpha2))
3774 pr_debug("Regulatory domain changed to driver built-in settings (unknown country)\n");
3776 if (reg_request_cell_base(lr))
3777 pr_debug("Regulatory domain changed to country: %c%c by Cell Station\n",
3778 rd->alpha2[0], rd->alpha2[1]);
3780 pr_debug("Regulatory domain changed to country: %c%c\n",
3781 rd->alpha2[0], rd->alpha2[1]);
3785 pr_debug(" DFS Master region: %s", reg_dfs_region_str(rd->dfs_region));
3789 static void print_regdomain_info(const struct ieee80211_regdomain *rd)
3791 pr_debug("Regulatory domain: %c%c\n", rd->alpha2[0], rd->alpha2[1]);
3795 static int reg_set_rd_core(const struct ieee80211_regdomain *rd)
3797 if (!is_world_regdom(rd->alpha2))
3799 update_world_regdomain(rd);
3803 static int reg_set_rd_user(const struct ieee80211_regdomain *rd,
3804 struct regulatory_request *user_request)
3806 const struct ieee80211_regdomain *intersected_rd = NULL;
3808 if (!regdom_changes(rd->alpha2))
3811 if (!is_valid_rd(rd)) {
3812 pr_err("Invalid regulatory domain detected: %c%c\n",
3813 rd->alpha2[0], rd->alpha2[1]);
3814 print_regdomain_info(rd);
3818 if (!user_request->intersect) {
3819 reset_regdomains(false, rd);
3823 intersected_rd = regdom_intersect(rd, get_cfg80211_regdom());
3824 if (!intersected_rd)
3829 reset_regdomains(false, intersected_rd);
3834 static int reg_set_rd_driver(const struct ieee80211_regdomain *rd,
3835 struct regulatory_request *driver_request)
3837 const struct ieee80211_regdomain *regd;
3838 const struct ieee80211_regdomain *intersected_rd = NULL;
3839 const struct ieee80211_regdomain *tmp;
3840 struct wiphy *request_wiphy;
3842 if (is_world_regdom(rd->alpha2))
3845 if (!regdom_changes(rd->alpha2))
3848 if (!is_valid_rd(rd)) {
3849 pr_err("Invalid regulatory domain detected: %c%c\n",
3850 rd->alpha2[0], rd->alpha2[1]);
3851 print_regdomain_info(rd);
3855 request_wiphy = wiphy_idx_to_wiphy(driver_request->wiphy_idx);
3859 if (!driver_request->intersect) {
3861 wiphy_lock(request_wiphy);
3862 if (request_wiphy->regd) {
3863 wiphy_unlock(request_wiphy);
3867 regd = reg_copy_regd(rd);
3869 wiphy_unlock(request_wiphy);
3870 return PTR_ERR(regd);
3873 rcu_assign_pointer(request_wiphy->regd, regd);
3874 wiphy_unlock(request_wiphy);
3875 reset_regdomains(false, rd);
3879 intersected_rd = regdom_intersect(rd, get_cfg80211_regdom());
3880 if (!intersected_rd)
3884 * We can trash what CRDA provided now.
3885 * However if a driver requested this specific regulatory
3886 * domain we keep it for its private use
3888 tmp = get_wiphy_regdom(request_wiphy);
3889 rcu_assign_pointer(request_wiphy->regd, rd);
3890 rcu_free_regdom(tmp);
3894 reset_regdomains(false, intersected_rd);
3899 static int reg_set_rd_country_ie(const struct ieee80211_regdomain *rd,
3900 struct regulatory_request *country_ie_request)
3902 struct wiphy *request_wiphy;
3904 if (!is_alpha2_set(rd->alpha2) && !is_an_alpha2(rd->alpha2) &&
3905 !is_unknown_alpha2(rd->alpha2))
3909 * Lets only bother proceeding on the same alpha2 if the current
3910 * rd is non static (it means CRDA was present and was used last)
3911 * and the pending request came in from a country IE
3914 if (!is_valid_rd(rd)) {
3915 pr_err("Invalid regulatory domain detected: %c%c\n",
3916 rd->alpha2[0], rd->alpha2[1]);
3917 print_regdomain_info(rd);
3921 request_wiphy = wiphy_idx_to_wiphy(country_ie_request->wiphy_idx);
3925 if (country_ie_request->intersect)
3928 reset_regdomains(false, rd);
3933 * Use this call to set the current regulatory domain. Conflicts with
3934 * multiple drivers can be ironed out later. Caller must've already
3935 * kmalloc'd the rd structure.
3937 int set_regdom(const struct ieee80211_regdomain *rd,
3938 enum ieee80211_regd_source regd_src)
3940 struct regulatory_request *lr;
3941 bool user_reset = false;
3944 if (IS_ERR_OR_NULL(rd))
3947 if (!reg_is_valid_request(rd->alpha2)) {
3952 if (regd_src == REGD_SOURCE_CRDA)
3953 reset_crda_timeouts();
3955 lr = get_last_request();
3957 /* Note that this doesn't update the wiphys, this is done below */
3958 switch (lr->initiator) {
3959 case NL80211_REGDOM_SET_BY_CORE:
3960 r = reg_set_rd_core(rd);
3962 case NL80211_REGDOM_SET_BY_USER:
3963 cfg80211_save_user_regdom(rd);
3964 r = reg_set_rd_user(rd, lr);
3967 case NL80211_REGDOM_SET_BY_DRIVER:
3968 r = reg_set_rd_driver(rd, lr);
3970 case NL80211_REGDOM_SET_BY_COUNTRY_IE:
3971 r = reg_set_rd_country_ie(rd, lr);
3974 WARN(1, "invalid initiator %d\n", lr->initiator);
3982 reg_set_request_processed();
3985 /* Back to world regulatory in case of errors */
3986 restore_regulatory_settings(user_reset, false);
3993 /* This would make this whole thing pointless */
3994 if (WARN_ON(!lr->intersect && rd != get_cfg80211_regdom()))
3997 /* update all wiphys now with the new established regulatory domain */
3998 update_all_wiphy_regulatory(lr->initiator);
4000 print_regdomain(get_cfg80211_regdom());
4002 nl80211_send_reg_change_event(lr);
4004 reg_set_request_processed();
4009 static int __regulatory_set_wiphy_regd(struct wiphy *wiphy,
4010 struct ieee80211_regdomain *rd)
4012 const struct ieee80211_regdomain *regd;
4013 const struct ieee80211_regdomain *prev_regd;
4014 struct cfg80211_registered_device *rdev;
4016 if (WARN_ON(!wiphy || !rd))
4019 if (WARN(!(wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED),
4020 "wiphy should have REGULATORY_WIPHY_SELF_MANAGED\n"))
4023 if (WARN(!is_valid_rd(rd),
4024 "Invalid regulatory domain detected: %c%c\n",
4025 rd->alpha2[0], rd->alpha2[1])) {
4026 print_regdomain_info(rd);
4030 regd = reg_copy_regd(rd);
4032 return PTR_ERR(regd);
4034 rdev = wiphy_to_rdev(wiphy);
4036 spin_lock(®_requests_lock);
4037 prev_regd = rdev->requested_regd;
4038 rdev->requested_regd = regd;
4039 spin_unlock(®_requests_lock);
4045 int regulatory_set_wiphy_regd(struct wiphy *wiphy,
4046 struct ieee80211_regdomain *rd)
4048 int ret = __regulatory_set_wiphy_regd(wiphy, rd);
4053 schedule_work(®_work);
4056 EXPORT_SYMBOL(regulatory_set_wiphy_regd);
4058 int regulatory_set_wiphy_regd_sync(struct wiphy *wiphy,
4059 struct ieee80211_regdomain *rd)
4065 ret = __regulatory_set_wiphy_regd(wiphy, rd);
4069 /* process the request immediately */
4070 reg_process_self_managed_hint(wiphy);
4071 reg_check_channels();
4074 EXPORT_SYMBOL(regulatory_set_wiphy_regd_sync);
4076 void wiphy_regulatory_register(struct wiphy *wiphy)
4078 struct regulatory_request *lr = get_last_request();
4080 /* self-managed devices ignore beacon hints and country IE */
4081 if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) {
4082 wiphy->regulatory_flags |= REGULATORY_DISABLE_BEACON_HINTS |
4083 REGULATORY_COUNTRY_IE_IGNORE;
4086 * The last request may have been received before this
4087 * registration call. Call the driver notifier if
4088 * initiator is USER.
4090 if (lr->initiator == NL80211_REGDOM_SET_BY_USER)
4091 reg_call_notifier(wiphy, lr);
4094 if (!reg_dev_ignore_cell_hint(wiphy))
4095 reg_num_devs_support_basehint++;
4097 wiphy_update_regulatory(wiphy, lr->initiator);
4098 wiphy_all_share_dfs_chan_state(wiphy);
4099 reg_process_self_managed_hints();
4102 void wiphy_regulatory_deregister(struct wiphy *wiphy)
4104 struct wiphy *request_wiphy = NULL;
4105 struct regulatory_request *lr;
4107 lr = get_last_request();
4109 if (!reg_dev_ignore_cell_hint(wiphy))
4110 reg_num_devs_support_basehint--;
4112 rcu_free_regdom(get_wiphy_regdom(wiphy));
4113 RCU_INIT_POINTER(wiphy->regd, NULL);
4116 request_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx);
4118 if (!request_wiphy || request_wiphy != wiphy)
4121 lr->wiphy_idx = WIPHY_IDX_INVALID;
4122 lr->country_ie_env = ENVIRON_ANY;
4126 * See FCC notices for UNII band definitions
4127 * 5GHz: https://www.fcc.gov/document/5-ghz-unlicensed-spectrum-unii
4128 * 6GHz: https://www.fcc.gov/document/fcc-proposes-more-spectrum-unlicensed-use-0
4130 int cfg80211_get_unii(int freq)
4133 if (freq >= 5150 && freq <= 5250)
4137 if (freq > 5250 && freq <= 5350)
4141 if (freq > 5350 && freq <= 5470)
4145 if (freq > 5470 && freq <= 5725)
4149 if (freq > 5725 && freq <= 5825)
4153 if (freq > 5925 && freq <= 6425)
4157 if (freq > 6425 && freq <= 6525)
4161 if (freq > 6525 && freq <= 6875)
4165 if (freq > 6875 && freq <= 7125)
4171 bool regulatory_indoor_allowed(void)
4173 return reg_is_indoor;
4176 bool regulatory_pre_cac_allowed(struct wiphy *wiphy)
4178 const struct ieee80211_regdomain *regd = NULL;
4179 const struct ieee80211_regdomain *wiphy_regd = NULL;
4180 bool pre_cac_allowed = false;
4184 regd = rcu_dereference(cfg80211_regdomain);
4185 wiphy_regd = rcu_dereference(wiphy->regd);
4187 if (regd->dfs_region == NL80211_DFS_ETSI)
4188 pre_cac_allowed = true;
4192 return pre_cac_allowed;
4195 if (regd->dfs_region == wiphy_regd->dfs_region &&
4196 wiphy_regd->dfs_region == NL80211_DFS_ETSI)
4197 pre_cac_allowed = true;
4201 return pre_cac_allowed;
4203 EXPORT_SYMBOL(regulatory_pre_cac_allowed);
4205 static void cfg80211_check_and_end_cac(struct cfg80211_registered_device *rdev)
4207 struct wireless_dev *wdev;
4208 /* If we finished CAC or received radar, we should end any
4209 * CAC running on the same channels.
4210 * the check !cfg80211_chandef_dfs_usable contain 2 options:
4211 * either all channels are available - those the CAC_FINISHED
4212 * event has effected another wdev state, or there is a channel
4213 * in unavailable state in wdev chandef - those the RADAR_DETECTED
4214 * event has effected another wdev state.
4215 * In both cases we should end the CAC on the wdev.
4217 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
4218 if (wdev->cac_started &&
4219 !cfg80211_chandef_dfs_usable(&rdev->wiphy, &wdev->chandef))
4220 rdev_end_cac(rdev, wdev->netdev);
4224 void regulatory_propagate_dfs_state(struct wiphy *wiphy,
4225 struct cfg80211_chan_def *chandef,
4226 enum nl80211_dfs_state dfs_state,
4227 enum nl80211_radar_event event)
4229 struct cfg80211_registered_device *rdev;
4233 if (WARN_ON(!cfg80211_chandef_valid(chandef)))
4236 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
4237 if (wiphy == &rdev->wiphy)
4240 if (!reg_dfs_domain_same(wiphy, &rdev->wiphy))
4243 if (!ieee80211_get_channel(&rdev->wiphy,
4244 chandef->chan->center_freq))
4247 cfg80211_set_dfs_state(&rdev->wiphy, chandef, dfs_state);
4249 if (event == NL80211_RADAR_DETECTED ||
4250 event == NL80211_RADAR_CAC_FINISHED) {
4251 cfg80211_sched_dfs_chan_update(rdev);
4252 cfg80211_check_and_end_cac(rdev);
4255 nl80211_radar_notify(rdev, chandef, event, NULL, GFP_KERNEL);
4259 static int __init regulatory_init_db(void)
4264 * It's possible that - due to other bugs/issues - cfg80211
4265 * never called regulatory_init() below, or that it failed;
4266 * in that case, don't try to do any further work here as
4267 * it's doomed to lead to crashes.
4269 if (IS_ERR_OR_NULL(reg_pdev))
4272 err = load_builtin_regdb_keys();
4276 /* We always try to get an update for the static regdomain */
4277 err = regulatory_hint_core(cfg80211_world_regdom->alpha2);
4279 if (err == -ENOMEM) {
4280 platform_device_unregister(reg_pdev);
4284 * N.B. kobject_uevent_env() can fail mainly for when we're out
4285 * memory which is handled and propagated appropriately above
4286 * but it can also fail during a netlink_broadcast() or during
4287 * early boot for call_usermodehelper(). For now treat these
4288 * errors as non-fatal.
4290 pr_err("kobject_uevent_env() was unable to call CRDA during init\n");
4294 * Finally, if the user set the module parameter treat it
4297 if (!is_world_regdom(ieee80211_regdom))
4298 regulatory_hint_user(ieee80211_regdom,
4299 NL80211_USER_REG_HINT_USER);
4304 late_initcall(regulatory_init_db);
4307 int __init regulatory_init(void)
4309 reg_pdev = platform_device_register_simple("regulatory", 0, NULL, 0);
4310 if (IS_ERR(reg_pdev))
4311 return PTR_ERR(reg_pdev);
4313 rcu_assign_pointer(cfg80211_regdomain, cfg80211_world_regdom);
4315 user_alpha2[0] = '9';
4316 user_alpha2[1] = '7';
4319 return regulatory_init_db();
4325 void regulatory_exit(void)
4327 struct regulatory_request *reg_request, *tmp;
4328 struct reg_beacon *reg_beacon, *btmp;
4330 cancel_work_sync(®_work);
4331 cancel_crda_timeout_sync();
4332 cancel_delayed_work_sync(®_check_chans);
4334 /* Lock to suppress warnings */
4336 reset_regdomains(true, NULL);
4339 dev_set_uevent_suppress(®_pdev->dev, true);
4341 platform_device_unregister(reg_pdev);
4343 list_for_each_entry_safe(reg_beacon, btmp, ®_pending_beacons, list) {
4344 list_del(®_beacon->list);
4348 list_for_each_entry_safe(reg_beacon, btmp, ®_beacon_list, list) {
4349 list_del(®_beacon->list);
4353 list_for_each_entry_safe(reg_request, tmp, ®_requests_list, list) {
4354 list_del(®_request->list);
4358 if (!IS_ERR_OR_NULL(regdb))
4360 if (!IS_ERR_OR_NULL(cfg80211_user_regdom))
4361 kfree(cfg80211_user_regdom);
4363 free_regdb_keyring();