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 - 2019 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 spinlock_t reg_indoor_lock;
131 /* Used to track the userspace process controlling the indoor setting */
132 static u32 reg_is_indoor_portid;
134 static void restore_regulatory_settings(bool reset_user, bool cached);
135 static void print_regdomain(const struct ieee80211_regdomain *rd);
137 static const struct ieee80211_regdomain *get_cfg80211_regdom(void)
139 return rcu_dereference_rtnl(cfg80211_regdomain);
142 const struct ieee80211_regdomain *get_wiphy_regdom(struct wiphy *wiphy)
144 return rcu_dereference_rtnl(wiphy->regd);
147 static const char *reg_dfs_region_str(enum nl80211_dfs_regions dfs_region)
149 switch (dfs_region) {
150 case NL80211_DFS_UNSET:
152 case NL80211_DFS_FCC:
154 case NL80211_DFS_ETSI:
162 enum nl80211_dfs_regions reg_get_dfs_region(struct wiphy *wiphy)
164 const struct ieee80211_regdomain *regd = NULL;
165 const struct ieee80211_regdomain *wiphy_regd = NULL;
167 regd = get_cfg80211_regdom();
171 wiphy_regd = get_wiphy_regdom(wiphy);
175 if (wiphy_regd->dfs_region == regd->dfs_region)
178 pr_debug("%s: device specific dfs_region (%s) disagrees with cfg80211's central dfs_region (%s)\n",
179 dev_name(&wiphy->dev),
180 reg_dfs_region_str(wiphy_regd->dfs_region),
181 reg_dfs_region_str(regd->dfs_region));
184 return regd->dfs_region;
187 static void rcu_free_regdom(const struct ieee80211_regdomain *r)
191 kfree_rcu((struct ieee80211_regdomain *)r, rcu_head);
194 static struct regulatory_request *get_last_request(void)
196 return rcu_dereference_rtnl(last_request);
199 /* Used to queue up regulatory hints */
200 static LIST_HEAD(reg_requests_list);
201 static spinlock_t reg_requests_lock;
203 /* Used to queue up beacon hints for review */
204 static LIST_HEAD(reg_pending_beacons);
205 static spinlock_t reg_pending_beacons_lock;
207 /* Used to keep track of processed beacon hints */
208 static LIST_HEAD(reg_beacon_list);
211 struct list_head list;
212 struct ieee80211_channel chan;
215 static void reg_check_chans_work(struct work_struct *work);
216 static DECLARE_DELAYED_WORK(reg_check_chans, reg_check_chans_work);
218 static void reg_todo(struct work_struct *work);
219 static DECLARE_WORK(reg_work, reg_todo);
221 /* We keep a static world regulatory domain in case of the absence of CRDA */
222 static const struct ieee80211_regdomain world_regdom = {
226 /* IEEE 802.11b/g, channels 1..11 */
227 REG_RULE(2412-10, 2462+10, 40, 6, 20, 0),
228 /* IEEE 802.11b/g, channels 12..13. */
229 REG_RULE(2467-10, 2472+10, 20, 6, 20,
230 NL80211_RRF_NO_IR | NL80211_RRF_AUTO_BW),
231 /* IEEE 802.11 channel 14 - Only JP enables
232 * this and for 802.11b only */
233 REG_RULE(2484-10, 2484+10, 20, 6, 20,
235 NL80211_RRF_NO_OFDM),
236 /* IEEE 802.11a, channel 36..48 */
237 REG_RULE(5180-10, 5240+10, 80, 6, 20,
239 NL80211_RRF_AUTO_BW),
241 /* IEEE 802.11a, channel 52..64 - DFS required */
242 REG_RULE(5260-10, 5320+10, 80, 6, 20,
244 NL80211_RRF_AUTO_BW |
247 /* IEEE 802.11a, channel 100..144 - DFS required */
248 REG_RULE(5500-10, 5720+10, 160, 6, 20,
252 /* IEEE 802.11a, channel 149..165 */
253 REG_RULE(5745-10, 5825+10, 80, 6, 20,
256 /* IEEE 802.11ad (60GHz), channels 1..3 */
257 REG_RULE(56160+2160*1-1080, 56160+2160*3+1080, 2160, 0, 0, 0),
261 /* protected by RTNL */
262 static const struct ieee80211_regdomain *cfg80211_world_regdom =
265 static char *ieee80211_regdom = "00";
266 static char user_alpha2[2];
267 static const struct ieee80211_regdomain *cfg80211_user_regdom;
269 module_param(ieee80211_regdom, charp, 0444);
270 MODULE_PARM_DESC(ieee80211_regdom, "IEEE 802.11 regulatory domain code");
272 static void reg_free_request(struct regulatory_request *request)
274 if (request == &core_request_world)
277 if (request != get_last_request())
281 static void reg_free_last_request(void)
283 struct regulatory_request *lr = get_last_request();
285 if (lr != &core_request_world && lr)
286 kfree_rcu(lr, rcu_head);
289 static void reg_update_last_request(struct regulatory_request *request)
291 struct regulatory_request *lr;
293 lr = get_last_request();
297 reg_free_last_request();
298 rcu_assign_pointer(last_request, request);
301 static void reset_regdomains(bool full_reset,
302 const struct ieee80211_regdomain *new_regdom)
304 const struct ieee80211_regdomain *r;
308 r = get_cfg80211_regdom();
310 /* avoid freeing static information or freeing something twice */
311 if (r == cfg80211_world_regdom)
313 if (cfg80211_world_regdom == &world_regdom)
314 cfg80211_world_regdom = NULL;
315 if (r == &world_regdom)
319 rcu_free_regdom(cfg80211_world_regdom);
321 cfg80211_world_regdom = &world_regdom;
322 rcu_assign_pointer(cfg80211_regdomain, new_regdom);
327 reg_update_last_request(&core_request_world);
331 * Dynamic world regulatory domain requested by the wireless
332 * core upon initialization
334 static void update_world_regdomain(const struct ieee80211_regdomain *rd)
336 struct regulatory_request *lr;
338 lr = get_last_request();
342 reset_regdomains(false, rd);
344 cfg80211_world_regdom = rd;
347 bool is_world_regdom(const char *alpha2)
351 return alpha2[0] == '0' && alpha2[1] == '0';
354 static bool is_alpha2_set(const char *alpha2)
358 return alpha2[0] && alpha2[1];
361 static bool is_unknown_alpha2(const char *alpha2)
366 * Special case where regulatory domain was built by driver
367 * but a specific alpha2 cannot be determined
369 return alpha2[0] == '9' && alpha2[1] == '9';
372 static bool is_intersected_alpha2(const char *alpha2)
377 * Special case where regulatory domain is the
378 * result of an intersection between two regulatory domain
381 return alpha2[0] == '9' && alpha2[1] == '8';
384 static bool is_an_alpha2(const char *alpha2)
388 return isalpha(alpha2[0]) && isalpha(alpha2[1]);
391 static bool alpha2_equal(const char *alpha2_x, const char *alpha2_y)
393 if (!alpha2_x || !alpha2_y)
395 return alpha2_x[0] == alpha2_y[0] && alpha2_x[1] == alpha2_y[1];
398 static bool regdom_changes(const char *alpha2)
400 const struct ieee80211_regdomain *r = get_cfg80211_regdom();
404 return !alpha2_equal(r->alpha2, alpha2);
408 * The NL80211_REGDOM_SET_BY_USER regdom alpha2 is cached, this lets
409 * you know if a valid regulatory hint with NL80211_REGDOM_SET_BY_USER
410 * has ever been issued.
412 static bool is_user_regdom_saved(void)
414 if (user_alpha2[0] == '9' && user_alpha2[1] == '7')
417 /* This would indicate a mistake on the design */
418 if (WARN(!is_world_regdom(user_alpha2) && !is_an_alpha2(user_alpha2),
419 "Unexpected user alpha2: %c%c\n",
420 user_alpha2[0], user_alpha2[1]))
426 static const struct ieee80211_regdomain *
427 reg_copy_regd(const struct ieee80211_regdomain *src_regd)
429 struct ieee80211_regdomain *regd;
432 regd = kzalloc(struct_size(regd, reg_rules, src_regd->n_reg_rules),
435 return ERR_PTR(-ENOMEM);
437 memcpy(regd, src_regd, sizeof(struct ieee80211_regdomain));
439 for (i = 0; i < src_regd->n_reg_rules; i++)
440 memcpy(®d->reg_rules[i], &src_regd->reg_rules[i],
441 sizeof(struct ieee80211_reg_rule));
446 static void cfg80211_save_user_regdom(const struct ieee80211_regdomain *rd)
450 if (!IS_ERR(cfg80211_user_regdom))
451 kfree(cfg80211_user_regdom);
452 cfg80211_user_regdom = reg_copy_regd(rd);
455 struct reg_regdb_apply_request {
456 struct list_head list;
457 const struct ieee80211_regdomain *regdom;
460 static LIST_HEAD(reg_regdb_apply_list);
461 static DEFINE_MUTEX(reg_regdb_apply_mutex);
463 static void reg_regdb_apply(struct work_struct *work)
465 struct reg_regdb_apply_request *request;
469 mutex_lock(®_regdb_apply_mutex);
470 while (!list_empty(®_regdb_apply_list)) {
471 request = list_first_entry(®_regdb_apply_list,
472 struct reg_regdb_apply_request,
474 list_del(&request->list);
476 set_regdom(request->regdom, REGD_SOURCE_INTERNAL_DB);
479 mutex_unlock(®_regdb_apply_mutex);
484 static DECLARE_WORK(reg_regdb_work, reg_regdb_apply);
486 static int reg_schedule_apply(const struct ieee80211_regdomain *regdom)
488 struct reg_regdb_apply_request *request;
490 request = kzalloc(sizeof(struct reg_regdb_apply_request), GFP_KERNEL);
496 request->regdom = regdom;
498 mutex_lock(®_regdb_apply_mutex);
499 list_add_tail(&request->list, ®_regdb_apply_list);
500 mutex_unlock(®_regdb_apply_mutex);
502 schedule_work(®_regdb_work);
506 #ifdef CONFIG_CFG80211_CRDA_SUPPORT
507 /* Max number of consecutive attempts to communicate with CRDA */
508 #define REG_MAX_CRDA_TIMEOUTS 10
510 static u32 reg_crda_timeouts;
512 static void crda_timeout_work(struct work_struct *work);
513 static DECLARE_DELAYED_WORK(crda_timeout, crda_timeout_work);
515 static void crda_timeout_work(struct work_struct *work)
517 pr_debug("Timeout while waiting for CRDA to reply, restoring regulatory settings\n");
520 restore_regulatory_settings(true, false);
524 static void cancel_crda_timeout(void)
526 cancel_delayed_work(&crda_timeout);
529 static void cancel_crda_timeout_sync(void)
531 cancel_delayed_work_sync(&crda_timeout);
534 static void reset_crda_timeouts(void)
536 reg_crda_timeouts = 0;
540 * This lets us keep regulatory code which is updated on a regulatory
541 * basis in userspace.
543 static int call_crda(const char *alpha2)
546 char *env[] = { country, NULL };
549 snprintf(country, sizeof(country), "COUNTRY=%c%c",
550 alpha2[0], alpha2[1]);
552 if (reg_crda_timeouts > REG_MAX_CRDA_TIMEOUTS) {
553 pr_debug("Exceeded CRDA call max attempts. Not calling CRDA\n");
557 if (!is_world_regdom((char *) alpha2))
558 pr_debug("Calling CRDA for country: %c%c\n",
559 alpha2[0], alpha2[1]);
561 pr_debug("Calling CRDA to update world regulatory domain\n");
563 ret = kobject_uevent_env(®_pdev->dev.kobj, KOBJ_CHANGE, env);
567 queue_delayed_work(system_power_efficient_wq,
568 &crda_timeout, msecs_to_jiffies(3142));
572 static inline void cancel_crda_timeout(void) {}
573 static inline void cancel_crda_timeout_sync(void) {}
574 static inline void reset_crda_timeouts(void) {}
575 static inline int call_crda(const char *alpha2)
579 #endif /* CONFIG_CFG80211_CRDA_SUPPORT */
581 /* code to directly load a firmware database through request_firmware */
582 static const struct fwdb_header *regdb;
584 struct fwdb_country {
587 /* this struct cannot be extended */
588 } __packed __aligned(4);
590 struct fwdb_collection {
594 /* no optional data yet */
595 /* aligned to 2, then followed by __be16 array of rule pointers */
596 } __packed __aligned(4);
599 FWDB_FLAG_NO_OFDM = BIT(0),
600 FWDB_FLAG_NO_OUTDOOR = BIT(1),
601 FWDB_FLAG_DFS = BIT(2),
602 FWDB_FLAG_NO_IR = BIT(3),
603 FWDB_FLAG_AUTO_BW = BIT(4),
612 struct fwdb_wmm_rule {
613 struct fwdb_wmm_ac client[IEEE80211_NUM_ACS];
614 struct fwdb_wmm_ac ap[IEEE80211_NUM_ACS];
621 __be32 start, end, max_bw;
622 /* start of optional data */
625 } __packed __aligned(4);
627 #define FWDB_MAGIC 0x52474442
628 #define FWDB_VERSION 20
633 struct fwdb_country country[];
634 } __packed __aligned(4);
636 static int ecw2cw(int ecw)
638 return (1 << ecw) - 1;
641 static bool valid_wmm(struct fwdb_wmm_rule *rule)
643 struct fwdb_wmm_ac *ac = (struct fwdb_wmm_ac *)rule;
646 for (i = 0; i < IEEE80211_NUM_ACS * 2; i++) {
647 u16 cw_min = ecw2cw((ac[i].ecw & 0xf0) >> 4);
648 u16 cw_max = ecw2cw(ac[i].ecw & 0x0f);
649 u8 aifsn = ac[i].aifsn;
651 if (cw_min >= cw_max)
661 static bool valid_rule(const u8 *data, unsigned int size, u16 rule_ptr)
663 struct fwdb_rule *rule = (void *)(data + (rule_ptr << 2));
665 if ((u8 *)rule + sizeof(rule->len) > data + size)
668 /* mandatory fields */
669 if (rule->len < offsetofend(struct fwdb_rule, max_bw))
671 if (rule->len >= offsetofend(struct fwdb_rule, wmm_ptr)) {
672 u32 wmm_ptr = be16_to_cpu(rule->wmm_ptr) << 2;
673 struct fwdb_wmm_rule *wmm;
675 if (wmm_ptr + sizeof(struct fwdb_wmm_rule) > size)
678 wmm = (void *)(data + wmm_ptr);
686 static bool valid_country(const u8 *data, unsigned int size,
687 const struct fwdb_country *country)
689 unsigned int ptr = be16_to_cpu(country->coll_ptr) << 2;
690 struct fwdb_collection *coll = (void *)(data + ptr);
694 /* make sure we can read len/n_rules */
695 if ((u8 *)coll + offsetofend(typeof(*coll), n_rules) > data + size)
698 /* make sure base struct and all rules fit */
699 if ((u8 *)coll + ALIGN(coll->len, 2) +
700 (coll->n_rules * 2) > data + size)
703 /* mandatory fields must exist */
704 if (coll->len < offsetofend(struct fwdb_collection, dfs_region))
707 rules_ptr = (void *)((u8 *)coll + ALIGN(coll->len, 2));
709 for (i = 0; i < coll->n_rules; i++) {
710 u16 rule_ptr = be16_to_cpu(rules_ptr[i]);
712 if (!valid_rule(data, size, rule_ptr))
719 #ifdef CONFIG_CFG80211_REQUIRE_SIGNED_REGDB
720 static struct key *builtin_regdb_keys;
722 static void __init load_keys_from_buffer(const u8 *p, unsigned int buflen)
724 const u8 *end = p + buflen;
729 /* Each cert begins with an ASN.1 SEQUENCE tag and must be more
730 * than 256 bytes in size.
737 plen = (p[2] << 8) | p[3];
742 key = key_create_or_update(make_key_ref(builtin_regdb_keys, 1),
743 "asymmetric", NULL, p, plen,
744 ((KEY_POS_ALL & ~KEY_POS_SETATTR) |
745 KEY_USR_VIEW | KEY_USR_READ),
746 KEY_ALLOC_NOT_IN_QUOTA |
748 KEY_ALLOC_BYPASS_RESTRICTION);
750 pr_err("Problem loading in-kernel X.509 certificate (%ld)\n",
753 pr_notice("Loaded X.509 cert '%s'\n",
754 key_ref_to_ptr(key)->description);
763 pr_err("Problem parsing in-kernel X.509 certificate list\n");
766 static int __init load_builtin_regdb_keys(void)
769 keyring_alloc(".builtin_regdb_keys",
770 KUIDT_INIT(0), KGIDT_INIT(0), current_cred(),
771 ((KEY_POS_ALL & ~KEY_POS_SETATTR) |
772 KEY_USR_VIEW | KEY_USR_READ | KEY_USR_SEARCH),
773 KEY_ALLOC_NOT_IN_QUOTA, NULL, NULL);
774 if (IS_ERR(builtin_regdb_keys))
775 return PTR_ERR(builtin_regdb_keys);
777 pr_notice("Loading compiled-in X.509 certificates for regulatory database\n");
779 #ifdef CONFIG_CFG80211_USE_KERNEL_REGDB_KEYS
780 load_keys_from_buffer(shipped_regdb_certs, shipped_regdb_certs_len);
782 #ifdef CONFIG_CFG80211_EXTRA_REGDB_KEYDIR
783 if (CONFIG_CFG80211_EXTRA_REGDB_KEYDIR[0] != '\0')
784 load_keys_from_buffer(extra_regdb_certs, extra_regdb_certs_len);
790 static bool regdb_has_valid_signature(const u8 *data, unsigned int size)
792 const struct firmware *sig;
795 if (request_firmware(&sig, "regulatory.db.p7s", ®_pdev->dev))
798 result = verify_pkcs7_signature(data, size, sig->data, sig->size,
800 VERIFYING_UNSPECIFIED_SIGNATURE,
803 release_firmware(sig);
808 static void free_regdb_keyring(void)
810 key_put(builtin_regdb_keys);
813 static int load_builtin_regdb_keys(void)
818 static bool regdb_has_valid_signature(const u8 *data, unsigned int size)
823 static void free_regdb_keyring(void)
826 #endif /* CONFIG_CFG80211_REQUIRE_SIGNED_REGDB */
828 static bool valid_regdb(const u8 *data, unsigned int size)
830 const struct fwdb_header *hdr = (void *)data;
831 const struct fwdb_country *country;
833 if (size < sizeof(*hdr))
836 if (hdr->magic != cpu_to_be32(FWDB_MAGIC))
839 if (hdr->version != cpu_to_be32(FWDB_VERSION))
842 if (!regdb_has_valid_signature(data, size))
845 country = &hdr->country[0];
846 while ((u8 *)(country + 1) <= data + size) {
847 if (!country->coll_ptr)
849 if (!valid_country(data, size, country))
857 static void set_wmm_rule(const struct fwdb_header *db,
858 const struct fwdb_country *country,
859 const struct fwdb_rule *rule,
860 struct ieee80211_reg_rule *rrule)
862 struct ieee80211_wmm_rule *wmm_rule = &rrule->wmm_rule;
863 struct fwdb_wmm_rule *wmm;
864 unsigned int i, wmm_ptr;
866 wmm_ptr = be16_to_cpu(rule->wmm_ptr) << 2;
867 wmm = (void *)((u8 *)db + wmm_ptr);
869 if (!valid_wmm(wmm)) {
870 pr_err("Invalid regulatory WMM rule %u-%u in domain %c%c\n",
871 be32_to_cpu(rule->start), be32_to_cpu(rule->end),
872 country->alpha2[0], country->alpha2[1]);
876 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
877 wmm_rule->client[i].cw_min =
878 ecw2cw((wmm->client[i].ecw & 0xf0) >> 4);
879 wmm_rule->client[i].cw_max = ecw2cw(wmm->client[i].ecw & 0x0f);
880 wmm_rule->client[i].aifsn = wmm->client[i].aifsn;
881 wmm_rule->client[i].cot =
882 1000 * be16_to_cpu(wmm->client[i].cot);
883 wmm_rule->ap[i].cw_min = ecw2cw((wmm->ap[i].ecw & 0xf0) >> 4);
884 wmm_rule->ap[i].cw_max = ecw2cw(wmm->ap[i].ecw & 0x0f);
885 wmm_rule->ap[i].aifsn = wmm->ap[i].aifsn;
886 wmm_rule->ap[i].cot = 1000 * be16_to_cpu(wmm->ap[i].cot);
889 rrule->has_wmm = true;
892 static int __regdb_query_wmm(const struct fwdb_header *db,
893 const struct fwdb_country *country, int freq,
894 struct ieee80211_reg_rule *rrule)
896 unsigned int ptr = be16_to_cpu(country->coll_ptr) << 2;
897 struct fwdb_collection *coll = (void *)((u8 *)db + ptr);
900 for (i = 0; i < coll->n_rules; i++) {
901 __be16 *rules_ptr = (void *)((u8 *)coll + ALIGN(coll->len, 2));
902 unsigned int rule_ptr = be16_to_cpu(rules_ptr[i]) << 2;
903 struct fwdb_rule *rule = (void *)((u8 *)db + rule_ptr);
905 if (rule->len < offsetofend(struct fwdb_rule, wmm_ptr))
908 if (freq >= KHZ_TO_MHZ(be32_to_cpu(rule->start)) &&
909 freq <= KHZ_TO_MHZ(be32_to_cpu(rule->end))) {
910 set_wmm_rule(db, country, rule, rrule);
918 int reg_query_regdb_wmm(char *alpha2, int freq, struct ieee80211_reg_rule *rule)
920 const struct fwdb_header *hdr = regdb;
921 const struct fwdb_country *country;
927 return PTR_ERR(regdb);
929 country = &hdr->country[0];
930 while (country->coll_ptr) {
931 if (alpha2_equal(alpha2, country->alpha2))
932 return __regdb_query_wmm(regdb, country, freq, rule);
939 EXPORT_SYMBOL(reg_query_regdb_wmm);
941 static int regdb_query_country(const struct fwdb_header *db,
942 const struct fwdb_country *country)
944 unsigned int ptr = be16_to_cpu(country->coll_ptr) << 2;
945 struct fwdb_collection *coll = (void *)((u8 *)db + ptr);
946 struct ieee80211_regdomain *regdom;
949 regdom = kzalloc(struct_size(regdom, reg_rules, coll->n_rules),
954 regdom->n_reg_rules = coll->n_rules;
955 regdom->alpha2[0] = country->alpha2[0];
956 regdom->alpha2[1] = country->alpha2[1];
957 regdom->dfs_region = coll->dfs_region;
959 for (i = 0; i < regdom->n_reg_rules; i++) {
960 __be16 *rules_ptr = (void *)((u8 *)coll + ALIGN(coll->len, 2));
961 unsigned int rule_ptr = be16_to_cpu(rules_ptr[i]) << 2;
962 struct fwdb_rule *rule = (void *)((u8 *)db + rule_ptr);
963 struct ieee80211_reg_rule *rrule = ®dom->reg_rules[i];
965 rrule->freq_range.start_freq_khz = be32_to_cpu(rule->start);
966 rrule->freq_range.end_freq_khz = be32_to_cpu(rule->end);
967 rrule->freq_range.max_bandwidth_khz = be32_to_cpu(rule->max_bw);
969 rrule->power_rule.max_antenna_gain = 0;
970 rrule->power_rule.max_eirp = be16_to_cpu(rule->max_eirp);
973 if (rule->flags & FWDB_FLAG_NO_OFDM)
974 rrule->flags |= NL80211_RRF_NO_OFDM;
975 if (rule->flags & FWDB_FLAG_NO_OUTDOOR)
976 rrule->flags |= NL80211_RRF_NO_OUTDOOR;
977 if (rule->flags & FWDB_FLAG_DFS)
978 rrule->flags |= NL80211_RRF_DFS;
979 if (rule->flags & FWDB_FLAG_NO_IR)
980 rrule->flags |= NL80211_RRF_NO_IR;
981 if (rule->flags & FWDB_FLAG_AUTO_BW)
982 rrule->flags |= NL80211_RRF_AUTO_BW;
984 rrule->dfs_cac_ms = 0;
986 /* handle optional data */
987 if (rule->len >= offsetofend(struct fwdb_rule, cac_timeout))
989 1000 * be16_to_cpu(rule->cac_timeout);
990 if (rule->len >= offsetofend(struct fwdb_rule, wmm_ptr))
991 set_wmm_rule(db, country, rule, rrule);
994 return reg_schedule_apply(regdom);
997 static int query_regdb(const char *alpha2)
999 const struct fwdb_header *hdr = regdb;
1000 const struct fwdb_country *country;
1005 return PTR_ERR(regdb);
1007 country = &hdr->country[0];
1008 while (country->coll_ptr) {
1009 if (alpha2_equal(alpha2, country->alpha2))
1010 return regdb_query_country(regdb, country);
1017 static void regdb_fw_cb(const struct firmware *fw, void *context)
1020 bool restore = true;
1024 pr_info("failed to load regulatory.db\n");
1025 set_error = -ENODATA;
1026 } else if (!valid_regdb(fw->data, fw->size)) {
1027 pr_info("loaded regulatory.db is malformed or signature is missing/invalid\n");
1028 set_error = -EINVAL;
1032 if (regdb && !IS_ERR(regdb)) {
1033 /* negative case - a bug
1034 * positive case - can happen due to race in case of multiple cb's in
1035 * queue, due to usage of asynchronous callback
1037 * Either case, just restore and free new db.
1039 } else if (set_error) {
1040 regdb = ERR_PTR(set_error);
1042 db = kmemdup(fw->data, fw->size, GFP_KERNEL);
1045 restore = context && query_regdb(context);
1052 restore_regulatory_settings(true, false);
1058 release_firmware(fw);
1061 static int query_regdb_file(const char *alpha2)
1066 return query_regdb(alpha2);
1068 alpha2 = kmemdup(alpha2, 2, GFP_KERNEL);
1072 return request_firmware_nowait(THIS_MODULE, true, "regulatory.db",
1073 ®_pdev->dev, GFP_KERNEL,
1074 (void *)alpha2, regdb_fw_cb);
1077 int reg_reload_regdb(void)
1079 const struct firmware *fw;
1083 err = request_firmware(&fw, "regulatory.db", ®_pdev->dev);
1087 if (!valid_regdb(fw->data, fw->size)) {
1092 db = kmemdup(fw->data, fw->size, GFP_KERNEL);
1099 if (!IS_ERR_OR_NULL(regdb))
1105 release_firmware(fw);
1109 static bool reg_query_database(struct regulatory_request *request)
1111 if (query_regdb_file(request->alpha2) == 0)
1114 if (call_crda(request->alpha2) == 0)
1120 bool reg_is_valid_request(const char *alpha2)
1122 struct regulatory_request *lr = get_last_request();
1124 if (!lr || lr->processed)
1127 return alpha2_equal(lr->alpha2, alpha2);
1130 static const struct ieee80211_regdomain *reg_get_regdomain(struct wiphy *wiphy)
1132 struct regulatory_request *lr = get_last_request();
1135 * Follow the driver's regulatory domain, if present, unless a country
1136 * IE has been processed or a user wants to help complaince further
1138 if (lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE &&
1139 lr->initiator != NL80211_REGDOM_SET_BY_USER &&
1141 return get_wiphy_regdom(wiphy);
1143 return get_cfg80211_regdom();
1147 reg_get_max_bandwidth_from_range(const struct ieee80211_regdomain *rd,
1148 const struct ieee80211_reg_rule *rule)
1150 const struct ieee80211_freq_range *freq_range = &rule->freq_range;
1151 const struct ieee80211_freq_range *freq_range_tmp;
1152 const struct ieee80211_reg_rule *tmp;
1153 u32 start_freq, end_freq, idx, no;
1155 for (idx = 0; idx < rd->n_reg_rules; idx++)
1156 if (rule == &rd->reg_rules[idx])
1159 if (idx == rd->n_reg_rules)
1162 /* get start_freq */
1166 tmp = &rd->reg_rules[--no];
1167 freq_range_tmp = &tmp->freq_range;
1169 if (freq_range_tmp->end_freq_khz < freq_range->start_freq_khz)
1172 freq_range = freq_range_tmp;
1175 start_freq = freq_range->start_freq_khz;
1178 freq_range = &rule->freq_range;
1181 while (no < rd->n_reg_rules - 1) {
1182 tmp = &rd->reg_rules[++no];
1183 freq_range_tmp = &tmp->freq_range;
1185 if (freq_range_tmp->start_freq_khz > freq_range->end_freq_khz)
1188 freq_range = freq_range_tmp;
1191 end_freq = freq_range->end_freq_khz;
1193 return end_freq - start_freq;
1196 unsigned int reg_get_max_bandwidth(const struct ieee80211_regdomain *rd,
1197 const struct ieee80211_reg_rule *rule)
1199 unsigned int bw = reg_get_max_bandwidth_from_range(rd, rule);
1201 if (rule->flags & NL80211_RRF_NO_160MHZ)
1202 bw = min_t(unsigned int, bw, MHZ_TO_KHZ(80));
1203 if (rule->flags & NL80211_RRF_NO_80MHZ)
1204 bw = min_t(unsigned int, bw, MHZ_TO_KHZ(40));
1207 * HT40+/HT40- limits are handled per-channel. Only limit BW if both
1210 if (rule->flags & NL80211_RRF_NO_HT40MINUS &&
1211 rule->flags & NL80211_RRF_NO_HT40PLUS)
1212 bw = min_t(unsigned int, bw, MHZ_TO_KHZ(20));
1217 /* Sanity check on a regulatory rule */
1218 static bool is_valid_reg_rule(const struct ieee80211_reg_rule *rule)
1220 const struct ieee80211_freq_range *freq_range = &rule->freq_range;
1223 if (freq_range->start_freq_khz <= 0 || freq_range->end_freq_khz <= 0)
1226 if (freq_range->start_freq_khz > freq_range->end_freq_khz)
1229 freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz;
1231 if (freq_range->end_freq_khz <= freq_range->start_freq_khz ||
1232 freq_range->max_bandwidth_khz > freq_diff)
1238 static bool is_valid_rd(const struct ieee80211_regdomain *rd)
1240 const struct ieee80211_reg_rule *reg_rule = NULL;
1243 if (!rd->n_reg_rules)
1246 if (WARN_ON(rd->n_reg_rules > NL80211_MAX_SUPP_REG_RULES))
1249 for (i = 0; i < rd->n_reg_rules; i++) {
1250 reg_rule = &rd->reg_rules[i];
1251 if (!is_valid_reg_rule(reg_rule))
1259 * freq_in_rule_band - tells us if a frequency is in a frequency band
1260 * @freq_range: frequency rule we want to query
1261 * @freq_khz: frequency we are inquiring about
1263 * This lets us know if a specific frequency rule is or is not relevant to
1264 * a specific frequency's band. Bands are device specific and artificial
1265 * definitions (the "2.4 GHz band", the "5 GHz band" and the "60GHz band"),
1266 * however it is safe for now to assume that a frequency rule should not be
1267 * part of a frequency's band if the start freq or end freq are off by more
1268 * than 2 GHz for the 2.4 and 5 GHz bands, and by more than 20 GHz for the
1270 * This resolution can be lowered and should be considered as we add
1271 * regulatory rule support for other "bands".
1273 static bool freq_in_rule_band(const struct ieee80211_freq_range *freq_range,
1276 #define ONE_GHZ_IN_KHZ 1000000
1278 * From 802.11ad: directional multi-gigabit (DMG):
1279 * Pertaining to operation in a frequency band containing a channel
1280 * with the Channel starting frequency above 45 GHz.
1282 u32 limit = freq_khz > 45 * ONE_GHZ_IN_KHZ ?
1283 20 * ONE_GHZ_IN_KHZ : 2 * ONE_GHZ_IN_KHZ;
1284 if (abs(freq_khz - freq_range->start_freq_khz) <= limit)
1286 if (abs(freq_khz - freq_range->end_freq_khz) <= limit)
1289 #undef ONE_GHZ_IN_KHZ
1293 * Later on we can perhaps use the more restrictive DFS
1294 * region but we don't have information for that yet so
1295 * for now simply disallow conflicts.
1297 static enum nl80211_dfs_regions
1298 reg_intersect_dfs_region(const enum nl80211_dfs_regions dfs_region1,
1299 const enum nl80211_dfs_regions dfs_region2)
1301 if (dfs_region1 != dfs_region2)
1302 return NL80211_DFS_UNSET;
1306 static void reg_wmm_rules_intersect(const struct ieee80211_wmm_ac *wmm_ac1,
1307 const struct ieee80211_wmm_ac *wmm_ac2,
1308 struct ieee80211_wmm_ac *intersect)
1310 intersect->cw_min = max_t(u16, wmm_ac1->cw_min, wmm_ac2->cw_min);
1311 intersect->cw_max = max_t(u16, wmm_ac1->cw_max, wmm_ac2->cw_max);
1312 intersect->cot = min_t(u16, wmm_ac1->cot, wmm_ac2->cot);
1313 intersect->aifsn = max_t(u8, wmm_ac1->aifsn, wmm_ac2->aifsn);
1317 * Helper for regdom_intersect(), this does the real
1318 * mathematical intersection fun
1320 static int reg_rules_intersect(const struct ieee80211_regdomain *rd1,
1321 const struct ieee80211_regdomain *rd2,
1322 const struct ieee80211_reg_rule *rule1,
1323 const struct ieee80211_reg_rule *rule2,
1324 struct ieee80211_reg_rule *intersected_rule)
1326 const struct ieee80211_freq_range *freq_range1, *freq_range2;
1327 struct ieee80211_freq_range *freq_range;
1328 const struct ieee80211_power_rule *power_rule1, *power_rule2;
1329 struct ieee80211_power_rule *power_rule;
1330 const struct ieee80211_wmm_rule *wmm_rule1, *wmm_rule2;
1331 struct ieee80211_wmm_rule *wmm_rule;
1332 u32 freq_diff, max_bandwidth1, max_bandwidth2;
1334 freq_range1 = &rule1->freq_range;
1335 freq_range2 = &rule2->freq_range;
1336 freq_range = &intersected_rule->freq_range;
1338 power_rule1 = &rule1->power_rule;
1339 power_rule2 = &rule2->power_rule;
1340 power_rule = &intersected_rule->power_rule;
1342 wmm_rule1 = &rule1->wmm_rule;
1343 wmm_rule2 = &rule2->wmm_rule;
1344 wmm_rule = &intersected_rule->wmm_rule;
1346 freq_range->start_freq_khz = max(freq_range1->start_freq_khz,
1347 freq_range2->start_freq_khz);
1348 freq_range->end_freq_khz = min(freq_range1->end_freq_khz,
1349 freq_range2->end_freq_khz);
1351 max_bandwidth1 = freq_range1->max_bandwidth_khz;
1352 max_bandwidth2 = freq_range2->max_bandwidth_khz;
1354 if (rule1->flags & NL80211_RRF_AUTO_BW)
1355 max_bandwidth1 = reg_get_max_bandwidth(rd1, rule1);
1356 if (rule2->flags & NL80211_RRF_AUTO_BW)
1357 max_bandwidth2 = reg_get_max_bandwidth(rd2, rule2);
1359 freq_range->max_bandwidth_khz = min(max_bandwidth1, max_bandwidth2);
1361 intersected_rule->flags = rule1->flags | rule2->flags;
1364 * In case NL80211_RRF_AUTO_BW requested for both rules
1365 * set AUTO_BW in intersected rule also. Next we will
1366 * calculate BW correctly in handle_channel function.
1367 * In other case remove AUTO_BW flag while we calculate
1368 * maximum bandwidth correctly and auto calculation is
1371 if ((rule1->flags & NL80211_RRF_AUTO_BW) &&
1372 (rule2->flags & NL80211_RRF_AUTO_BW))
1373 intersected_rule->flags |= NL80211_RRF_AUTO_BW;
1375 intersected_rule->flags &= ~NL80211_RRF_AUTO_BW;
1377 freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz;
1378 if (freq_range->max_bandwidth_khz > freq_diff)
1379 freq_range->max_bandwidth_khz = freq_diff;
1381 power_rule->max_eirp = min(power_rule1->max_eirp,
1382 power_rule2->max_eirp);
1383 power_rule->max_antenna_gain = min(power_rule1->max_antenna_gain,
1384 power_rule2->max_antenna_gain);
1386 intersected_rule->dfs_cac_ms = max(rule1->dfs_cac_ms,
1389 if (rule1->has_wmm && rule2->has_wmm) {
1392 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1393 reg_wmm_rules_intersect(&wmm_rule1->client[ac],
1394 &wmm_rule2->client[ac],
1395 &wmm_rule->client[ac]);
1396 reg_wmm_rules_intersect(&wmm_rule1->ap[ac],
1401 intersected_rule->has_wmm = true;
1402 } else if (rule1->has_wmm) {
1403 *wmm_rule = *wmm_rule1;
1404 intersected_rule->has_wmm = true;
1405 } else if (rule2->has_wmm) {
1406 *wmm_rule = *wmm_rule2;
1407 intersected_rule->has_wmm = true;
1409 intersected_rule->has_wmm = false;
1412 if (!is_valid_reg_rule(intersected_rule))
1418 /* check whether old rule contains new rule */
1419 static bool rule_contains(struct ieee80211_reg_rule *r1,
1420 struct ieee80211_reg_rule *r2)
1422 /* for simplicity, currently consider only same flags */
1423 if (r1->flags != r2->flags)
1426 /* verify r1 is more restrictive */
1427 if ((r1->power_rule.max_antenna_gain >
1428 r2->power_rule.max_antenna_gain) ||
1429 r1->power_rule.max_eirp > r2->power_rule.max_eirp)
1432 /* make sure r2's range is contained within r1 */
1433 if (r1->freq_range.start_freq_khz > r2->freq_range.start_freq_khz ||
1434 r1->freq_range.end_freq_khz < r2->freq_range.end_freq_khz)
1437 /* and finally verify that r1.max_bw >= r2.max_bw */
1438 if (r1->freq_range.max_bandwidth_khz <
1439 r2->freq_range.max_bandwidth_khz)
1445 /* add or extend current rules. do nothing if rule is already contained */
1446 static void add_rule(struct ieee80211_reg_rule *rule,
1447 struct ieee80211_reg_rule *reg_rules, u32 *n_rules)
1449 struct ieee80211_reg_rule *tmp_rule;
1452 for (i = 0; i < *n_rules; i++) {
1453 tmp_rule = ®_rules[i];
1454 /* rule is already contained - do nothing */
1455 if (rule_contains(tmp_rule, rule))
1458 /* extend rule if possible */
1459 if (rule_contains(rule, tmp_rule)) {
1460 memcpy(tmp_rule, rule, sizeof(*rule));
1465 memcpy(®_rules[*n_rules], rule, sizeof(*rule));
1470 * regdom_intersect - do the intersection between two regulatory domains
1471 * @rd1: first regulatory domain
1472 * @rd2: second regulatory domain
1474 * Use this function to get the intersection between two regulatory domains.
1475 * Once completed we will mark the alpha2 for the rd as intersected, "98",
1476 * as no one single alpha2 can represent this regulatory domain.
1478 * Returns a pointer to the regulatory domain structure which will hold the
1479 * resulting intersection of rules between rd1 and rd2. We will
1480 * kzalloc() this structure for you.
1482 static struct ieee80211_regdomain *
1483 regdom_intersect(const struct ieee80211_regdomain *rd1,
1484 const struct ieee80211_regdomain *rd2)
1488 unsigned int num_rules = 0;
1489 const struct ieee80211_reg_rule *rule1, *rule2;
1490 struct ieee80211_reg_rule intersected_rule;
1491 struct ieee80211_regdomain *rd;
1497 * First we get a count of the rules we'll need, then we actually
1498 * build them. This is to so we can malloc() and free() a
1499 * regdomain once. The reason we use reg_rules_intersect() here
1500 * is it will return -EINVAL if the rule computed makes no sense.
1501 * All rules that do check out OK are valid.
1504 for (x = 0; x < rd1->n_reg_rules; x++) {
1505 rule1 = &rd1->reg_rules[x];
1506 for (y = 0; y < rd2->n_reg_rules; y++) {
1507 rule2 = &rd2->reg_rules[y];
1508 if (!reg_rules_intersect(rd1, rd2, rule1, rule2,
1517 rd = kzalloc(struct_size(rd, reg_rules, num_rules), GFP_KERNEL);
1521 for (x = 0; x < rd1->n_reg_rules; x++) {
1522 rule1 = &rd1->reg_rules[x];
1523 for (y = 0; y < rd2->n_reg_rules; y++) {
1524 rule2 = &rd2->reg_rules[y];
1525 r = reg_rules_intersect(rd1, rd2, rule1, rule2,
1528 * No need to memset here the intersected rule here as
1529 * we're not using the stack anymore
1534 add_rule(&intersected_rule, rd->reg_rules,
1539 rd->alpha2[0] = '9';
1540 rd->alpha2[1] = '8';
1541 rd->dfs_region = reg_intersect_dfs_region(rd1->dfs_region,
1548 * XXX: add support for the rest of enum nl80211_reg_rule_flags, we may
1549 * want to just have the channel structure use these
1551 static u32 map_regdom_flags(u32 rd_flags)
1553 u32 channel_flags = 0;
1554 if (rd_flags & NL80211_RRF_NO_IR_ALL)
1555 channel_flags |= IEEE80211_CHAN_NO_IR;
1556 if (rd_flags & NL80211_RRF_DFS)
1557 channel_flags |= IEEE80211_CHAN_RADAR;
1558 if (rd_flags & NL80211_RRF_NO_OFDM)
1559 channel_flags |= IEEE80211_CHAN_NO_OFDM;
1560 if (rd_flags & NL80211_RRF_NO_OUTDOOR)
1561 channel_flags |= IEEE80211_CHAN_INDOOR_ONLY;
1562 if (rd_flags & NL80211_RRF_IR_CONCURRENT)
1563 channel_flags |= IEEE80211_CHAN_IR_CONCURRENT;
1564 if (rd_flags & NL80211_RRF_NO_HT40MINUS)
1565 channel_flags |= IEEE80211_CHAN_NO_HT40MINUS;
1566 if (rd_flags & NL80211_RRF_NO_HT40PLUS)
1567 channel_flags |= IEEE80211_CHAN_NO_HT40PLUS;
1568 if (rd_flags & NL80211_RRF_NO_80MHZ)
1569 channel_flags |= IEEE80211_CHAN_NO_80MHZ;
1570 if (rd_flags & NL80211_RRF_NO_160MHZ)
1571 channel_flags |= IEEE80211_CHAN_NO_160MHZ;
1572 if (rd_flags & NL80211_RRF_NO_HE)
1573 channel_flags |= IEEE80211_CHAN_NO_HE;
1574 return channel_flags;
1577 static const struct ieee80211_reg_rule *
1578 freq_reg_info_regd(u32 center_freq,
1579 const struct ieee80211_regdomain *regd, u32 bw)
1582 bool band_rule_found = false;
1583 bool bw_fits = false;
1586 return ERR_PTR(-EINVAL);
1588 for (i = 0; i < regd->n_reg_rules; i++) {
1589 const struct ieee80211_reg_rule *rr;
1590 const struct ieee80211_freq_range *fr = NULL;
1592 rr = ®d->reg_rules[i];
1593 fr = &rr->freq_range;
1596 * We only need to know if one frequency rule was
1597 * in center_freq's band, that's enough, so let's
1598 * not overwrite it once found
1600 if (!band_rule_found)
1601 band_rule_found = freq_in_rule_band(fr, center_freq);
1603 bw_fits = cfg80211_does_bw_fit_range(fr, center_freq, bw);
1605 if (band_rule_found && bw_fits)
1609 if (!band_rule_found)
1610 return ERR_PTR(-ERANGE);
1612 return ERR_PTR(-EINVAL);
1615 static const struct ieee80211_reg_rule *
1616 __freq_reg_info(struct wiphy *wiphy, u32 center_freq, u32 min_bw)
1618 const struct ieee80211_regdomain *regd = reg_get_regdomain(wiphy);
1619 const struct ieee80211_reg_rule *reg_rule = NULL;
1622 for (bw = MHZ_TO_KHZ(20); bw >= min_bw; bw = bw / 2) {
1623 reg_rule = freq_reg_info_regd(center_freq, regd, bw);
1624 if (!IS_ERR(reg_rule))
1631 const struct ieee80211_reg_rule *freq_reg_info(struct wiphy *wiphy,
1634 return __freq_reg_info(wiphy, center_freq, MHZ_TO_KHZ(20));
1636 EXPORT_SYMBOL(freq_reg_info);
1638 const char *reg_initiator_name(enum nl80211_reg_initiator initiator)
1640 switch (initiator) {
1641 case NL80211_REGDOM_SET_BY_CORE:
1643 case NL80211_REGDOM_SET_BY_USER:
1645 case NL80211_REGDOM_SET_BY_DRIVER:
1647 case NL80211_REGDOM_SET_BY_COUNTRY_IE:
1648 return "country element";
1654 EXPORT_SYMBOL(reg_initiator_name);
1656 static uint32_t reg_rule_to_chan_bw_flags(const struct ieee80211_regdomain *regd,
1657 const struct ieee80211_reg_rule *reg_rule,
1658 const struct ieee80211_channel *chan)
1660 const struct ieee80211_freq_range *freq_range = NULL;
1661 u32 max_bandwidth_khz, center_freq_khz, bw_flags = 0;
1663 freq_range = ®_rule->freq_range;
1665 max_bandwidth_khz = freq_range->max_bandwidth_khz;
1666 center_freq_khz = ieee80211_channel_to_khz(chan);
1667 /* Check if auto calculation requested */
1668 if (reg_rule->flags & NL80211_RRF_AUTO_BW)
1669 max_bandwidth_khz = reg_get_max_bandwidth(regd, reg_rule);
1671 /* If we get a reg_rule we can assume that at least 5Mhz fit */
1672 if (!cfg80211_does_bw_fit_range(freq_range,
1675 bw_flags |= IEEE80211_CHAN_NO_10MHZ;
1676 if (!cfg80211_does_bw_fit_range(freq_range,
1679 bw_flags |= IEEE80211_CHAN_NO_20MHZ;
1681 if (max_bandwidth_khz < MHZ_TO_KHZ(10))
1682 bw_flags |= IEEE80211_CHAN_NO_10MHZ;
1683 if (max_bandwidth_khz < MHZ_TO_KHZ(20))
1684 bw_flags |= IEEE80211_CHAN_NO_20MHZ;
1685 if (max_bandwidth_khz < MHZ_TO_KHZ(40))
1686 bw_flags |= IEEE80211_CHAN_NO_HT40;
1687 if (max_bandwidth_khz < MHZ_TO_KHZ(80))
1688 bw_flags |= IEEE80211_CHAN_NO_80MHZ;
1689 if (max_bandwidth_khz < MHZ_TO_KHZ(160))
1690 bw_flags |= IEEE80211_CHAN_NO_160MHZ;
1694 static void handle_channel_single_rule(struct wiphy *wiphy,
1695 enum nl80211_reg_initiator initiator,
1696 struct ieee80211_channel *chan,
1698 struct regulatory_request *lr,
1699 struct wiphy *request_wiphy,
1700 const struct ieee80211_reg_rule *reg_rule)
1703 const struct ieee80211_power_rule *power_rule = NULL;
1704 const struct ieee80211_regdomain *regd;
1706 regd = reg_get_regdomain(wiphy);
1708 power_rule = ®_rule->power_rule;
1709 bw_flags = reg_rule_to_chan_bw_flags(regd, reg_rule, chan);
1711 if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER &&
1712 request_wiphy && request_wiphy == wiphy &&
1713 request_wiphy->regulatory_flags & REGULATORY_STRICT_REG) {
1715 * This guarantees the driver's requested regulatory domain
1716 * will always be used as a base for further regulatory
1719 chan->flags = chan->orig_flags =
1720 map_regdom_flags(reg_rule->flags) | bw_flags;
1721 chan->max_antenna_gain = chan->orig_mag =
1722 (int) MBI_TO_DBI(power_rule->max_antenna_gain);
1723 chan->max_reg_power = chan->max_power = chan->orig_mpwr =
1724 (int) MBM_TO_DBM(power_rule->max_eirp);
1726 if (chan->flags & IEEE80211_CHAN_RADAR) {
1727 chan->dfs_cac_ms = IEEE80211_DFS_MIN_CAC_TIME_MS;
1728 if (reg_rule->dfs_cac_ms)
1729 chan->dfs_cac_ms = reg_rule->dfs_cac_ms;
1735 chan->dfs_state = NL80211_DFS_USABLE;
1736 chan->dfs_state_entered = jiffies;
1738 chan->beacon_found = false;
1739 chan->flags = flags | bw_flags | map_regdom_flags(reg_rule->flags);
1740 chan->max_antenna_gain =
1741 min_t(int, chan->orig_mag,
1742 MBI_TO_DBI(power_rule->max_antenna_gain));
1743 chan->max_reg_power = (int) MBM_TO_DBM(power_rule->max_eirp);
1745 if (chan->flags & IEEE80211_CHAN_RADAR) {
1746 if (reg_rule->dfs_cac_ms)
1747 chan->dfs_cac_ms = reg_rule->dfs_cac_ms;
1749 chan->dfs_cac_ms = IEEE80211_DFS_MIN_CAC_TIME_MS;
1752 if (chan->orig_mpwr) {
1754 * Devices that use REGULATORY_COUNTRY_IE_FOLLOW_POWER
1755 * will always follow the passed country IE power settings.
1757 if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE &&
1758 wiphy->regulatory_flags & REGULATORY_COUNTRY_IE_FOLLOW_POWER)
1759 chan->max_power = chan->max_reg_power;
1761 chan->max_power = min(chan->orig_mpwr,
1762 chan->max_reg_power);
1764 chan->max_power = chan->max_reg_power;
1767 static void handle_channel_adjacent_rules(struct wiphy *wiphy,
1768 enum nl80211_reg_initiator initiator,
1769 struct ieee80211_channel *chan,
1771 struct regulatory_request *lr,
1772 struct wiphy *request_wiphy,
1773 const struct ieee80211_reg_rule *rrule1,
1774 const struct ieee80211_reg_rule *rrule2,
1775 struct ieee80211_freq_range *comb_range)
1779 const struct ieee80211_power_rule *power_rule1 = NULL;
1780 const struct ieee80211_power_rule *power_rule2 = NULL;
1781 const struct ieee80211_regdomain *regd;
1783 regd = reg_get_regdomain(wiphy);
1785 power_rule1 = &rrule1->power_rule;
1786 power_rule2 = &rrule2->power_rule;
1787 bw_flags1 = reg_rule_to_chan_bw_flags(regd, rrule1, chan);
1788 bw_flags2 = reg_rule_to_chan_bw_flags(regd, rrule2, chan);
1790 if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER &&
1791 request_wiphy && request_wiphy == wiphy &&
1792 request_wiphy->regulatory_flags & REGULATORY_STRICT_REG) {
1793 /* This guarantees the driver's requested regulatory domain
1794 * will always be used as a base for further regulatory
1798 map_regdom_flags(rrule1->flags) |
1799 map_regdom_flags(rrule2->flags) |
1802 chan->orig_flags = chan->flags;
1803 chan->max_antenna_gain =
1804 min_t(int, MBI_TO_DBI(power_rule1->max_antenna_gain),
1805 MBI_TO_DBI(power_rule2->max_antenna_gain));
1806 chan->orig_mag = chan->max_antenna_gain;
1807 chan->max_reg_power =
1808 min_t(int, MBM_TO_DBM(power_rule1->max_eirp),
1809 MBM_TO_DBM(power_rule2->max_eirp));
1810 chan->max_power = chan->max_reg_power;
1811 chan->orig_mpwr = chan->max_reg_power;
1813 if (chan->flags & IEEE80211_CHAN_RADAR) {
1814 chan->dfs_cac_ms = IEEE80211_DFS_MIN_CAC_TIME_MS;
1815 if (rrule1->dfs_cac_ms || rrule2->dfs_cac_ms)
1816 chan->dfs_cac_ms = max_t(unsigned int,
1818 rrule2->dfs_cac_ms);
1824 chan->dfs_state = NL80211_DFS_USABLE;
1825 chan->dfs_state_entered = jiffies;
1827 chan->beacon_found = false;
1828 chan->flags = flags | bw_flags1 | bw_flags2 |
1829 map_regdom_flags(rrule1->flags) |
1830 map_regdom_flags(rrule2->flags);
1832 /* reg_rule_to_chan_bw_flags may forbids 10 and forbids 20 MHz
1833 * (otherwise no adj. rule case), recheck therefore
1835 if (cfg80211_does_bw_fit_range(comb_range,
1836 ieee80211_channel_to_khz(chan),
1838 chan->flags &= ~IEEE80211_CHAN_NO_10MHZ;
1839 if (cfg80211_does_bw_fit_range(comb_range,
1840 ieee80211_channel_to_khz(chan),
1842 chan->flags &= ~IEEE80211_CHAN_NO_20MHZ;
1844 chan->max_antenna_gain =
1845 min_t(int, chan->orig_mag,
1847 MBI_TO_DBI(power_rule1->max_antenna_gain),
1848 MBI_TO_DBI(power_rule2->max_antenna_gain)));
1849 chan->max_reg_power = min_t(int,
1850 MBM_TO_DBM(power_rule1->max_eirp),
1851 MBM_TO_DBM(power_rule2->max_eirp));
1853 if (chan->flags & IEEE80211_CHAN_RADAR) {
1854 if (rrule1->dfs_cac_ms || rrule2->dfs_cac_ms)
1855 chan->dfs_cac_ms = max_t(unsigned int,
1857 rrule2->dfs_cac_ms);
1859 chan->dfs_cac_ms = IEEE80211_DFS_MIN_CAC_TIME_MS;
1862 if (chan->orig_mpwr) {
1863 /* Devices that use REGULATORY_COUNTRY_IE_FOLLOW_POWER
1864 * will always follow the passed country IE power settings.
1866 if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE &&
1867 wiphy->regulatory_flags & REGULATORY_COUNTRY_IE_FOLLOW_POWER)
1868 chan->max_power = chan->max_reg_power;
1870 chan->max_power = min(chan->orig_mpwr,
1871 chan->max_reg_power);
1873 chan->max_power = chan->max_reg_power;
1877 /* Note that right now we assume the desired channel bandwidth
1878 * is always 20 MHz for each individual channel (HT40 uses 20 MHz
1879 * per channel, the primary and the extension channel).
1881 static void handle_channel(struct wiphy *wiphy,
1882 enum nl80211_reg_initiator initiator,
1883 struct ieee80211_channel *chan)
1885 const u32 orig_chan_freq = ieee80211_channel_to_khz(chan);
1886 struct regulatory_request *lr = get_last_request();
1887 struct wiphy *request_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx);
1888 const struct ieee80211_reg_rule *rrule = NULL;
1889 const struct ieee80211_reg_rule *rrule1 = NULL;
1890 const struct ieee80211_reg_rule *rrule2 = NULL;
1892 u32 flags = chan->orig_flags;
1894 rrule = freq_reg_info(wiphy, orig_chan_freq);
1895 if (IS_ERR(rrule)) {
1896 /* check for adjacent match, therefore get rules for
1897 * chan - 20 MHz and chan + 20 MHz and test
1898 * if reg rules are adjacent
1900 rrule1 = freq_reg_info(wiphy,
1901 orig_chan_freq - MHZ_TO_KHZ(20));
1902 rrule2 = freq_reg_info(wiphy,
1903 orig_chan_freq + MHZ_TO_KHZ(20));
1904 if (!IS_ERR(rrule1) && !IS_ERR(rrule2)) {
1905 struct ieee80211_freq_range comb_range;
1907 if (rrule1->freq_range.end_freq_khz !=
1908 rrule2->freq_range.start_freq_khz)
1911 comb_range.start_freq_khz =
1912 rrule1->freq_range.start_freq_khz;
1913 comb_range.end_freq_khz =
1914 rrule2->freq_range.end_freq_khz;
1915 comb_range.max_bandwidth_khz =
1917 rrule1->freq_range.max_bandwidth_khz,
1918 rrule2->freq_range.max_bandwidth_khz);
1920 if (!cfg80211_does_bw_fit_range(&comb_range,
1925 handle_channel_adjacent_rules(wiphy, initiator, chan,
1926 flags, lr, request_wiphy,
1933 /* We will disable all channels that do not match our
1934 * received regulatory rule unless the hint is coming
1935 * from a Country IE and the Country IE had no information
1936 * about a band. The IEEE 802.11 spec allows for an AP
1937 * to send only a subset of the regulatory rules allowed,
1938 * so an AP in the US that only supports 2.4 GHz may only send
1939 * a country IE with information for the 2.4 GHz band
1940 * while 5 GHz is still supported.
1942 if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE &&
1943 PTR_ERR(rrule) == -ERANGE)
1946 if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER &&
1947 request_wiphy && request_wiphy == wiphy &&
1948 request_wiphy->regulatory_flags & REGULATORY_STRICT_REG) {
1949 pr_debug("Disabling freq %d.%03d MHz for good\n",
1950 chan->center_freq, chan->freq_offset);
1951 chan->orig_flags |= IEEE80211_CHAN_DISABLED;
1952 chan->flags = chan->orig_flags;
1954 pr_debug("Disabling freq %d.%03d MHz\n",
1955 chan->center_freq, chan->freq_offset);
1956 chan->flags |= IEEE80211_CHAN_DISABLED;
1961 handle_channel_single_rule(wiphy, initiator, chan, flags, lr,
1962 request_wiphy, rrule);
1965 static void handle_band(struct wiphy *wiphy,
1966 enum nl80211_reg_initiator initiator,
1967 struct ieee80211_supported_band *sband)
1974 for (i = 0; i < sband->n_channels; i++)
1975 handle_channel(wiphy, initiator, &sband->channels[i]);
1978 static bool reg_request_cell_base(struct regulatory_request *request)
1980 if (request->initiator != NL80211_REGDOM_SET_BY_USER)
1982 return request->user_reg_hint_type == NL80211_USER_REG_HINT_CELL_BASE;
1985 bool reg_last_request_cell_base(void)
1987 return reg_request_cell_base(get_last_request());
1990 #ifdef CONFIG_CFG80211_REG_CELLULAR_HINTS
1991 /* Core specific check */
1992 static enum reg_request_treatment
1993 reg_ignore_cell_hint(struct regulatory_request *pending_request)
1995 struct regulatory_request *lr = get_last_request();
1997 if (!reg_num_devs_support_basehint)
1998 return REG_REQ_IGNORE;
2000 if (reg_request_cell_base(lr) &&
2001 !regdom_changes(pending_request->alpha2))
2002 return REG_REQ_ALREADY_SET;
2007 /* Device specific check */
2008 static bool reg_dev_ignore_cell_hint(struct wiphy *wiphy)
2010 return !(wiphy->features & NL80211_FEATURE_CELL_BASE_REG_HINTS);
2013 static enum reg_request_treatment
2014 reg_ignore_cell_hint(struct regulatory_request *pending_request)
2016 return REG_REQ_IGNORE;
2019 static bool reg_dev_ignore_cell_hint(struct wiphy *wiphy)
2025 static bool wiphy_strict_alpha2_regd(struct wiphy *wiphy)
2027 if (wiphy->regulatory_flags & REGULATORY_STRICT_REG &&
2028 !(wiphy->regulatory_flags & REGULATORY_CUSTOM_REG))
2033 static bool ignore_reg_update(struct wiphy *wiphy,
2034 enum nl80211_reg_initiator initiator)
2036 struct regulatory_request *lr = get_last_request();
2038 if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED)
2042 pr_debug("Ignoring regulatory request set by %s since last_request is not set\n",
2043 reg_initiator_name(initiator));
2047 if (initiator == NL80211_REGDOM_SET_BY_CORE &&
2048 wiphy->regulatory_flags & REGULATORY_CUSTOM_REG) {
2049 pr_debug("Ignoring regulatory request set by %s since the driver uses its own custom regulatory domain\n",
2050 reg_initiator_name(initiator));
2055 * wiphy->regd will be set once the device has its own
2056 * desired regulatory domain set
2058 if (wiphy_strict_alpha2_regd(wiphy) && !wiphy->regd &&
2059 initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE &&
2060 !is_world_regdom(lr->alpha2)) {
2061 pr_debug("Ignoring regulatory request set by %s since the driver requires its own regulatory domain to be set first\n",
2062 reg_initiator_name(initiator));
2066 if (reg_request_cell_base(lr))
2067 return reg_dev_ignore_cell_hint(wiphy);
2072 static bool reg_is_world_roaming(struct wiphy *wiphy)
2074 const struct ieee80211_regdomain *cr = get_cfg80211_regdom();
2075 const struct ieee80211_regdomain *wr = get_wiphy_regdom(wiphy);
2076 struct regulatory_request *lr = get_last_request();
2078 if (is_world_regdom(cr->alpha2) || (wr && is_world_regdom(wr->alpha2)))
2081 if (lr && lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE &&
2082 wiphy->regulatory_flags & REGULATORY_CUSTOM_REG)
2088 static void handle_reg_beacon(struct wiphy *wiphy, unsigned int chan_idx,
2089 struct reg_beacon *reg_beacon)
2091 struct ieee80211_supported_band *sband;
2092 struct ieee80211_channel *chan;
2093 bool channel_changed = false;
2094 struct ieee80211_channel chan_before;
2096 sband = wiphy->bands[reg_beacon->chan.band];
2097 chan = &sband->channels[chan_idx];
2099 if (likely(!ieee80211_channel_equal(chan, ®_beacon->chan)))
2102 if (chan->beacon_found)
2105 chan->beacon_found = true;
2107 if (!reg_is_world_roaming(wiphy))
2110 if (wiphy->regulatory_flags & REGULATORY_DISABLE_BEACON_HINTS)
2113 chan_before = *chan;
2115 if (chan->flags & IEEE80211_CHAN_NO_IR) {
2116 chan->flags &= ~IEEE80211_CHAN_NO_IR;
2117 channel_changed = true;
2120 if (channel_changed)
2121 nl80211_send_beacon_hint_event(wiphy, &chan_before, chan);
2125 * Called when a scan on a wiphy finds a beacon on
2128 static void wiphy_update_new_beacon(struct wiphy *wiphy,
2129 struct reg_beacon *reg_beacon)
2132 struct ieee80211_supported_band *sband;
2134 if (!wiphy->bands[reg_beacon->chan.band])
2137 sband = wiphy->bands[reg_beacon->chan.band];
2139 for (i = 0; i < sband->n_channels; i++)
2140 handle_reg_beacon(wiphy, i, reg_beacon);
2144 * Called upon reg changes or a new wiphy is added
2146 static void wiphy_update_beacon_reg(struct wiphy *wiphy)
2149 struct ieee80211_supported_band *sband;
2150 struct reg_beacon *reg_beacon;
2152 list_for_each_entry(reg_beacon, ®_beacon_list, list) {
2153 if (!wiphy->bands[reg_beacon->chan.band])
2155 sband = wiphy->bands[reg_beacon->chan.band];
2156 for (i = 0; i < sband->n_channels; i++)
2157 handle_reg_beacon(wiphy, i, reg_beacon);
2161 /* Reap the advantages of previously found beacons */
2162 static void reg_process_beacons(struct wiphy *wiphy)
2165 * Means we are just firing up cfg80211, so no beacons would
2166 * have been processed yet.
2170 wiphy_update_beacon_reg(wiphy);
2173 static bool is_ht40_allowed(struct ieee80211_channel *chan)
2177 if (chan->flags & IEEE80211_CHAN_DISABLED)
2179 /* This would happen when regulatory rules disallow HT40 completely */
2180 if ((chan->flags & IEEE80211_CHAN_NO_HT40) == IEEE80211_CHAN_NO_HT40)
2185 static void reg_process_ht_flags_channel(struct wiphy *wiphy,
2186 struct ieee80211_channel *channel)
2188 struct ieee80211_supported_band *sband = wiphy->bands[channel->band];
2189 struct ieee80211_channel *channel_before = NULL, *channel_after = NULL;
2190 const struct ieee80211_regdomain *regd;
2194 if (!is_ht40_allowed(channel)) {
2195 channel->flags |= IEEE80211_CHAN_NO_HT40;
2200 * We need to ensure the extension channels exist to
2201 * be able to use HT40- or HT40+, this finds them (or not)
2203 for (i = 0; i < sband->n_channels; i++) {
2204 struct ieee80211_channel *c = &sband->channels[i];
2206 if (c->center_freq == (channel->center_freq - 20))
2208 if (c->center_freq == (channel->center_freq + 20))
2213 regd = get_wiphy_regdom(wiphy);
2215 const struct ieee80211_reg_rule *reg_rule =
2216 freq_reg_info_regd(MHZ_TO_KHZ(channel->center_freq),
2217 regd, MHZ_TO_KHZ(20));
2219 if (!IS_ERR(reg_rule))
2220 flags = reg_rule->flags;
2224 * Please note that this assumes target bandwidth is 20 MHz,
2225 * if that ever changes we also need to change the below logic
2226 * to include that as well.
2228 if (!is_ht40_allowed(channel_before) ||
2229 flags & NL80211_RRF_NO_HT40MINUS)
2230 channel->flags |= IEEE80211_CHAN_NO_HT40MINUS;
2232 channel->flags &= ~IEEE80211_CHAN_NO_HT40MINUS;
2234 if (!is_ht40_allowed(channel_after) ||
2235 flags & NL80211_RRF_NO_HT40PLUS)
2236 channel->flags |= IEEE80211_CHAN_NO_HT40PLUS;
2238 channel->flags &= ~IEEE80211_CHAN_NO_HT40PLUS;
2241 static void reg_process_ht_flags_band(struct wiphy *wiphy,
2242 struct ieee80211_supported_band *sband)
2249 for (i = 0; i < sband->n_channels; i++)
2250 reg_process_ht_flags_channel(wiphy, &sband->channels[i]);
2253 static void reg_process_ht_flags(struct wiphy *wiphy)
2255 enum nl80211_band band;
2260 for (band = 0; band < NUM_NL80211_BANDS; band++)
2261 reg_process_ht_flags_band(wiphy, wiphy->bands[band]);
2264 static void reg_call_notifier(struct wiphy *wiphy,
2265 struct regulatory_request *request)
2267 if (wiphy->reg_notifier)
2268 wiphy->reg_notifier(wiphy, request);
2271 static bool reg_wdev_chan_valid(struct wiphy *wiphy, struct wireless_dev *wdev)
2273 struct cfg80211_chan_def chandef = {};
2274 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
2275 enum nl80211_iftype iftype;
2278 iftype = wdev->iftype;
2280 /* make sure the interface is active */
2281 if (!wdev->netdev || !netif_running(wdev->netdev))
2282 goto wdev_inactive_unlock;
2285 case NL80211_IFTYPE_AP:
2286 case NL80211_IFTYPE_P2P_GO:
2287 if (!wdev->beacon_interval)
2288 goto wdev_inactive_unlock;
2289 chandef = wdev->chandef;
2291 case NL80211_IFTYPE_ADHOC:
2292 if (!wdev->ssid_len)
2293 goto wdev_inactive_unlock;
2294 chandef = wdev->chandef;
2296 case NL80211_IFTYPE_STATION:
2297 case NL80211_IFTYPE_P2P_CLIENT:
2298 if (!wdev->current_bss ||
2299 !wdev->current_bss->pub.channel)
2300 goto wdev_inactive_unlock;
2302 if (!rdev->ops->get_channel ||
2303 rdev_get_channel(rdev, wdev, &chandef))
2304 cfg80211_chandef_create(&chandef,
2305 wdev->current_bss->pub.channel,
2306 NL80211_CHAN_NO_HT);
2308 case NL80211_IFTYPE_MONITOR:
2309 case NL80211_IFTYPE_AP_VLAN:
2310 case NL80211_IFTYPE_P2P_DEVICE:
2311 /* no enforcement required */
2314 /* others not implemented for now */
2322 case NL80211_IFTYPE_AP:
2323 case NL80211_IFTYPE_P2P_GO:
2324 case NL80211_IFTYPE_ADHOC:
2325 return cfg80211_reg_can_beacon_relax(wiphy, &chandef, iftype);
2326 case NL80211_IFTYPE_STATION:
2327 case NL80211_IFTYPE_P2P_CLIENT:
2328 return cfg80211_chandef_usable(wiphy, &chandef,
2329 IEEE80211_CHAN_DISABLED);
2336 wdev_inactive_unlock:
2341 static void reg_leave_invalid_chans(struct wiphy *wiphy)
2343 struct wireless_dev *wdev;
2344 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
2348 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list)
2349 if (!reg_wdev_chan_valid(wiphy, wdev))
2350 cfg80211_leave(rdev, wdev);
2353 static void reg_check_chans_work(struct work_struct *work)
2355 struct cfg80211_registered_device *rdev;
2357 pr_debug("Verifying active interfaces after reg change\n");
2360 list_for_each_entry(rdev, &cfg80211_rdev_list, list)
2361 if (!(rdev->wiphy.regulatory_flags &
2362 REGULATORY_IGNORE_STALE_KICKOFF))
2363 reg_leave_invalid_chans(&rdev->wiphy);
2368 static void reg_check_channels(void)
2371 * Give usermode a chance to do something nicer (move to another
2372 * channel, orderly disconnection), before forcing a disconnection.
2374 mod_delayed_work(system_power_efficient_wq,
2376 msecs_to_jiffies(REG_ENFORCE_GRACE_MS));
2379 static void wiphy_update_regulatory(struct wiphy *wiphy,
2380 enum nl80211_reg_initiator initiator)
2382 enum nl80211_band band;
2383 struct regulatory_request *lr = get_last_request();
2385 if (ignore_reg_update(wiphy, initiator)) {
2387 * Regulatory updates set by CORE are ignored for custom
2388 * regulatory cards. Let us notify the changes to the driver,
2389 * as some drivers used this to restore its orig_* reg domain.
2391 if (initiator == NL80211_REGDOM_SET_BY_CORE &&
2392 wiphy->regulatory_flags & REGULATORY_CUSTOM_REG &&
2393 !(wiphy->regulatory_flags &
2394 REGULATORY_WIPHY_SELF_MANAGED))
2395 reg_call_notifier(wiphy, lr);
2399 lr->dfs_region = get_cfg80211_regdom()->dfs_region;
2401 for (band = 0; band < NUM_NL80211_BANDS; band++)
2402 handle_band(wiphy, initiator, wiphy->bands[band]);
2404 reg_process_beacons(wiphy);
2405 reg_process_ht_flags(wiphy);
2406 reg_call_notifier(wiphy, lr);
2409 static void update_all_wiphy_regulatory(enum nl80211_reg_initiator initiator)
2411 struct cfg80211_registered_device *rdev;
2412 struct wiphy *wiphy;
2416 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
2417 wiphy = &rdev->wiphy;
2418 wiphy_update_regulatory(wiphy, initiator);
2421 reg_check_channels();
2424 static void handle_channel_custom(struct wiphy *wiphy,
2425 struct ieee80211_channel *chan,
2426 const struct ieee80211_regdomain *regd,
2430 const struct ieee80211_reg_rule *reg_rule = NULL;
2431 const struct ieee80211_power_rule *power_rule = NULL;
2432 u32 bw, center_freq_khz;
2434 center_freq_khz = ieee80211_channel_to_khz(chan);
2435 for (bw = MHZ_TO_KHZ(20); bw >= min_bw; bw = bw / 2) {
2436 reg_rule = freq_reg_info_regd(center_freq_khz, regd, bw);
2437 if (!IS_ERR(reg_rule))
2441 if (IS_ERR_OR_NULL(reg_rule)) {
2442 pr_debug("Disabling freq %d.%03d MHz as custom regd has no rule that fits it\n",
2443 chan->center_freq, chan->freq_offset);
2444 if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) {
2445 chan->flags |= IEEE80211_CHAN_DISABLED;
2447 chan->orig_flags |= IEEE80211_CHAN_DISABLED;
2448 chan->flags = chan->orig_flags;
2453 power_rule = ®_rule->power_rule;
2454 bw_flags = reg_rule_to_chan_bw_flags(regd, reg_rule, chan);
2456 chan->dfs_state_entered = jiffies;
2457 chan->dfs_state = NL80211_DFS_USABLE;
2459 chan->beacon_found = false;
2461 if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED)
2462 chan->flags = chan->orig_flags | bw_flags |
2463 map_regdom_flags(reg_rule->flags);
2465 chan->flags |= map_regdom_flags(reg_rule->flags) | bw_flags;
2467 chan->max_antenna_gain = (int) MBI_TO_DBI(power_rule->max_antenna_gain);
2468 chan->max_reg_power = chan->max_power =
2469 (int) MBM_TO_DBM(power_rule->max_eirp);
2471 if (chan->flags & IEEE80211_CHAN_RADAR) {
2472 if (reg_rule->dfs_cac_ms)
2473 chan->dfs_cac_ms = reg_rule->dfs_cac_ms;
2475 chan->dfs_cac_ms = IEEE80211_DFS_MIN_CAC_TIME_MS;
2478 chan->max_power = chan->max_reg_power;
2481 static void handle_band_custom(struct wiphy *wiphy,
2482 struct ieee80211_supported_band *sband,
2483 const struct ieee80211_regdomain *regd)
2491 * We currently assume that you always want at least 20 MHz,
2492 * otherwise channel 12 might get enabled if this rule is
2493 * compatible to US, which permits 2402 - 2472 MHz.
2495 for (i = 0; i < sband->n_channels; i++)
2496 handle_channel_custom(wiphy, &sband->channels[i], regd,
2500 /* Used by drivers prior to wiphy registration */
2501 void wiphy_apply_custom_regulatory(struct wiphy *wiphy,
2502 const struct ieee80211_regdomain *regd)
2504 enum nl80211_band band;
2505 unsigned int bands_set = 0;
2507 WARN(!(wiphy->regulatory_flags & REGULATORY_CUSTOM_REG),
2508 "wiphy should have REGULATORY_CUSTOM_REG\n");
2509 wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG;
2511 for (band = 0; band < NUM_NL80211_BANDS; band++) {
2512 if (!wiphy->bands[band])
2514 handle_band_custom(wiphy, wiphy->bands[band], regd);
2519 * no point in calling this if it won't have any effect
2520 * on your device's supported bands.
2522 WARN_ON(!bands_set);
2524 EXPORT_SYMBOL(wiphy_apply_custom_regulatory);
2526 static void reg_set_request_processed(void)
2528 bool need_more_processing = false;
2529 struct regulatory_request *lr = get_last_request();
2531 lr->processed = true;
2533 spin_lock(®_requests_lock);
2534 if (!list_empty(®_requests_list))
2535 need_more_processing = true;
2536 spin_unlock(®_requests_lock);
2538 cancel_crda_timeout();
2540 if (need_more_processing)
2541 schedule_work(®_work);
2545 * reg_process_hint_core - process core regulatory requests
2546 * @core_request: a pending core regulatory request
2548 * The wireless subsystem can use this function to process
2549 * a regulatory request issued by the regulatory core.
2551 static enum reg_request_treatment
2552 reg_process_hint_core(struct regulatory_request *core_request)
2554 if (reg_query_database(core_request)) {
2555 core_request->intersect = false;
2556 core_request->processed = false;
2557 reg_update_last_request(core_request);
2561 return REG_REQ_IGNORE;
2564 static enum reg_request_treatment
2565 __reg_process_hint_user(struct regulatory_request *user_request)
2567 struct regulatory_request *lr = get_last_request();
2569 if (reg_request_cell_base(user_request))
2570 return reg_ignore_cell_hint(user_request);
2572 if (reg_request_cell_base(lr))
2573 return REG_REQ_IGNORE;
2575 if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE)
2576 return REG_REQ_INTERSECT;
2578 * If the user knows better the user should set the regdom
2579 * to their country before the IE is picked up
2581 if (lr->initiator == NL80211_REGDOM_SET_BY_USER &&
2583 return REG_REQ_IGNORE;
2585 * Process user requests only after previous user/driver/core
2586 * requests have been processed
2588 if ((lr->initiator == NL80211_REGDOM_SET_BY_CORE ||
2589 lr->initiator == NL80211_REGDOM_SET_BY_DRIVER ||
2590 lr->initiator == NL80211_REGDOM_SET_BY_USER) &&
2591 regdom_changes(lr->alpha2))
2592 return REG_REQ_IGNORE;
2594 if (!regdom_changes(user_request->alpha2))
2595 return REG_REQ_ALREADY_SET;
2601 * reg_process_hint_user - process user regulatory requests
2602 * @user_request: a pending user regulatory request
2604 * The wireless subsystem can use this function to process
2605 * a regulatory request initiated by userspace.
2607 static enum reg_request_treatment
2608 reg_process_hint_user(struct regulatory_request *user_request)
2610 enum reg_request_treatment treatment;
2612 treatment = __reg_process_hint_user(user_request);
2613 if (treatment == REG_REQ_IGNORE ||
2614 treatment == REG_REQ_ALREADY_SET)
2615 return REG_REQ_IGNORE;
2617 user_request->intersect = treatment == REG_REQ_INTERSECT;
2618 user_request->processed = false;
2620 if (reg_query_database(user_request)) {
2621 reg_update_last_request(user_request);
2622 user_alpha2[0] = user_request->alpha2[0];
2623 user_alpha2[1] = user_request->alpha2[1];
2627 return REG_REQ_IGNORE;
2630 static enum reg_request_treatment
2631 __reg_process_hint_driver(struct regulatory_request *driver_request)
2633 struct regulatory_request *lr = get_last_request();
2635 if (lr->initiator == NL80211_REGDOM_SET_BY_CORE) {
2636 if (regdom_changes(driver_request->alpha2))
2638 return REG_REQ_ALREADY_SET;
2642 * This would happen if you unplug and plug your card
2643 * back in or if you add a new device for which the previously
2644 * loaded card also agrees on the regulatory domain.
2646 if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER &&
2647 !regdom_changes(driver_request->alpha2))
2648 return REG_REQ_ALREADY_SET;
2650 return REG_REQ_INTERSECT;
2654 * reg_process_hint_driver - process driver regulatory requests
2655 * @wiphy: the wireless device for the regulatory request
2656 * @driver_request: a pending driver regulatory request
2658 * The wireless subsystem can use this function to process
2659 * a regulatory request issued by an 802.11 driver.
2661 * Returns one of the different reg request treatment values.
2663 static enum reg_request_treatment
2664 reg_process_hint_driver(struct wiphy *wiphy,
2665 struct regulatory_request *driver_request)
2667 const struct ieee80211_regdomain *regd, *tmp;
2668 enum reg_request_treatment treatment;
2670 treatment = __reg_process_hint_driver(driver_request);
2672 switch (treatment) {
2675 case REG_REQ_IGNORE:
2676 return REG_REQ_IGNORE;
2677 case REG_REQ_INTERSECT:
2678 case REG_REQ_ALREADY_SET:
2679 regd = reg_copy_regd(get_cfg80211_regdom());
2681 return REG_REQ_IGNORE;
2683 tmp = get_wiphy_regdom(wiphy);
2684 rcu_assign_pointer(wiphy->regd, regd);
2685 rcu_free_regdom(tmp);
2689 driver_request->intersect = treatment == REG_REQ_INTERSECT;
2690 driver_request->processed = false;
2693 * Since CRDA will not be called in this case as we already
2694 * have applied the requested regulatory domain before we just
2695 * inform userspace we have processed the request
2697 if (treatment == REG_REQ_ALREADY_SET) {
2698 nl80211_send_reg_change_event(driver_request);
2699 reg_update_last_request(driver_request);
2700 reg_set_request_processed();
2701 return REG_REQ_ALREADY_SET;
2704 if (reg_query_database(driver_request)) {
2705 reg_update_last_request(driver_request);
2709 return REG_REQ_IGNORE;
2712 static enum reg_request_treatment
2713 __reg_process_hint_country_ie(struct wiphy *wiphy,
2714 struct regulatory_request *country_ie_request)
2716 struct wiphy *last_wiphy = NULL;
2717 struct regulatory_request *lr = get_last_request();
2719 if (reg_request_cell_base(lr)) {
2720 /* Trust a Cell base station over the AP's country IE */
2721 if (regdom_changes(country_ie_request->alpha2))
2722 return REG_REQ_IGNORE;
2723 return REG_REQ_ALREADY_SET;
2725 if (wiphy->regulatory_flags & REGULATORY_COUNTRY_IE_IGNORE)
2726 return REG_REQ_IGNORE;
2729 if (unlikely(!is_an_alpha2(country_ie_request->alpha2)))
2732 if (lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE)
2735 last_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx);
2737 if (last_wiphy != wiphy) {
2739 * Two cards with two APs claiming different
2740 * Country IE alpha2s. We could
2741 * intersect them, but that seems unlikely
2742 * to be correct. Reject second one for now.
2744 if (regdom_changes(country_ie_request->alpha2))
2745 return REG_REQ_IGNORE;
2746 return REG_REQ_ALREADY_SET;
2749 if (regdom_changes(country_ie_request->alpha2))
2751 return REG_REQ_ALREADY_SET;
2755 * reg_process_hint_country_ie - process regulatory requests from country IEs
2756 * @wiphy: the wireless device for the regulatory request
2757 * @country_ie_request: a regulatory request from a country IE
2759 * The wireless subsystem can use this function to process
2760 * a regulatory request issued by a country Information Element.
2762 * Returns one of the different reg request treatment values.
2764 static enum reg_request_treatment
2765 reg_process_hint_country_ie(struct wiphy *wiphy,
2766 struct regulatory_request *country_ie_request)
2768 enum reg_request_treatment treatment;
2770 treatment = __reg_process_hint_country_ie(wiphy, country_ie_request);
2772 switch (treatment) {
2775 case REG_REQ_IGNORE:
2776 return REG_REQ_IGNORE;
2777 case REG_REQ_ALREADY_SET:
2778 reg_free_request(country_ie_request);
2779 return REG_REQ_ALREADY_SET;
2780 case REG_REQ_INTERSECT:
2782 * This doesn't happen yet, not sure we
2783 * ever want to support it for this case.
2785 WARN_ONCE(1, "Unexpected intersection for country elements");
2786 return REG_REQ_IGNORE;
2789 country_ie_request->intersect = false;
2790 country_ie_request->processed = false;
2792 if (reg_query_database(country_ie_request)) {
2793 reg_update_last_request(country_ie_request);
2797 return REG_REQ_IGNORE;
2800 bool reg_dfs_domain_same(struct wiphy *wiphy1, struct wiphy *wiphy2)
2802 const struct ieee80211_regdomain *wiphy1_regd = NULL;
2803 const struct ieee80211_regdomain *wiphy2_regd = NULL;
2804 const struct ieee80211_regdomain *cfg80211_regd = NULL;
2805 bool dfs_domain_same;
2809 cfg80211_regd = rcu_dereference(cfg80211_regdomain);
2810 wiphy1_regd = rcu_dereference(wiphy1->regd);
2812 wiphy1_regd = cfg80211_regd;
2814 wiphy2_regd = rcu_dereference(wiphy2->regd);
2816 wiphy2_regd = cfg80211_regd;
2818 dfs_domain_same = wiphy1_regd->dfs_region == wiphy2_regd->dfs_region;
2822 return dfs_domain_same;
2825 static void reg_copy_dfs_chan_state(struct ieee80211_channel *dst_chan,
2826 struct ieee80211_channel *src_chan)
2828 if (!(dst_chan->flags & IEEE80211_CHAN_RADAR) ||
2829 !(src_chan->flags & IEEE80211_CHAN_RADAR))
2832 if (dst_chan->flags & IEEE80211_CHAN_DISABLED ||
2833 src_chan->flags & IEEE80211_CHAN_DISABLED)
2836 if (src_chan->center_freq == dst_chan->center_freq &&
2837 dst_chan->dfs_state == NL80211_DFS_USABLE) {
2838 dst_chan->dfs_state = src_chan->dfs_state;
2839 dst_chan->dfs_state_entered = src_chan->dfs_state_entered;
2843 static void wiphy_share_dfs_chan_state(struct wiphy *dst_wiphy,
2844 struct wiphy *src_wiphy)
2846 struct ieee80211_supported_band *src_sband, *dst_sband;
2847 struct ieee80211_channel *src_chan, *dst_chan;
2850 if (!reg_dfs_domain_same(dst_wiphy, src_wiphy))
2853 for (band = 0; band < NUM_NL80211_BANDS; band++) {
2854 dst_sband = dst_wiphy->bands[band];
2855 src_sband = src_wiphy->bands[band];
2856 if (!dst_sband || !src_sband)
2859 for (i = 0; i < dst_sband->n_channels; i++) {
2860 dst_chan = &dst_sband->channels[i];
2861 for (j = 0; j < src_sband->n_channels; j++) {
2862 src_chan = &src_sband->channels[j];
2863 reg_copy_dfs_chan_state(dst_chan, src_chan);
2869 static void wiphy_all_share_dfs_chan_state(struct wiphy *wiphy)
2871 struct cfg80211_registered_device *rdev;
2875 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
2876 if (wiphy == &rdev->wiphy)
2878 wiphy_share_dfs_chan_state(wiphy, &rdev->wiphy);
2882 /* This processes *all* regulatory hints */
2883 static void reg_process_hint(struct regulatory_request *reg_request)
2885 struct wiphy *wiphy = NULL;
2886 enum reg_request_treatment treatment;
2887 enum nl80211_reg_initiator initiator = reg_request->initiator;
2889 if (reg_request->wiphy_idx != WIPHY_IDX_INVALID)
2890 wiphy = wiphy_idx_to_wiphy(reg_request->wiphy_idx);
2892 switch (initiator) {
2893 case NL80211_REGDOM_SET_BY_CORE:
2894 treatment = reg_process_hint_core(reg_request);
2896 case NL80211_REGDOM_SET_BY_USER:
2897 treatment = reg_process_hint_user(reg_request);
2899 case NL80211_REGDOM_SET_BY_DRIVER:
2902 treatment = reg_process_hint_driver(wiphy, reg_request);
2904 case NL80211_REGDOM_SET_BY_COUNTRY_IE:
2907 treatment = reg_process_hint_country_ie(wiphy, reg_request);
2910 WARN(1, "invalid initiator %d\n", initiator);
2914 if (treatment == REG_REQ_IGNORE)
2917 WARN(treatment != REG_REQ_OK && treatment != REG_REQ_ALREADY_SET,
2918 "unexpected treatment value %d\n", treatment);
2920 /* This is required so that the orig_* parameters are saved.
2921 * NOTE: treatment must be set for any case that reaches here!
2923 if (treatment == REG_REQ_ALREADY_SET && wiphy &&
2924 wiphy->regulatory_flags & REGULATORY_STRICT_REG) {
2925 wiphy_update_regulatory(wiphy, initiator);
2926 wiphy_all_share_dfs_chan_state(wiphy);
2927 reg_check_channels();
2933 reg_free_request(reg_request);
2936 static void notify_self_managed_wiphys(struct regulatory_request *request)
2938 struct cfg80211_registered_device *rdev;
2939 struct wiphy *wiphy;
2941 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
2942 wiphy = &rdev->wiphy;
2943 if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED &&
2944 request->initiator == NL80211_REGDOM_SET_BY_USER)
2945 reg_call_notifier(wiphy, request);
2950 * Processes regulatory hints, this is all the NL80211_REGDOM_SET_BY_*
2951 * Regulatory hints come on a first come first serve basis and we
2952 * must process each one atomically.
2954 static void reg_process_pending_hints(void)
2956 struct regulatory_request *reg_request, *lr;
2958 lr = get_last_request();
2960 /* When last_request->processed becomes true this will be rescheduled */
2961 if (lr && !lr->processed) {
2962 pr_debug("Pending regulatory request, waiting for it to be processed...\n");
2966 spin_lock(®_requests_lock);
2968 if (list_empty(®_requests_list)) {
2969 spin_unlock(®_requests_lock);
2973 reg_request = list_first_entry(®_requests_list,
2974 struct regulatory_request,
2976 list_del_init(®_request->list);
2978 spin_unlock(®_requests_lock);
2980 notify_self_managed_wiphys(reg_request);
2982 reg_process_hint(reg_request);
2984 lr = get_last_request();
2986 spin_lock(®_requests_lock);
2987 if (!list_empty(®_requests_list) && lr && lr->processed)
2988 schedule_work(®_work);
2989 spin_unlock(®_requests_lock);
2992 /* Processes beacon hints -- this has nothing to do with country IEs */
2993 static void reg_process_pending_beacon_hints(void)
2995 struct cfg80211_registered_device *rdev;
2996 struct reg_beacon *pending_beacon, *tmp;
2998 /* This goes through the _pending_ beacon list */
2999 spin_lock_bh(®_pending_beacons_lock);
3001 list_for_each_entry_safe(pending_beacon, tmp,
3002 ®_pending_beacons, list) {
3003 list_del_init(&pending_beacon->list);
3005 /* Applies the beacon hint to current wiphys */
3006 list_for_each_entry(rdev, &cfg80211_rdev_list, list)
3007 wiphy_update_new_beacon(&rdev->wiphy, pending_beacon);
3009 /* Remembers the beacon hint for new wiphys or reg changes */
3010 list_add_tail(&pending_beacon->list, ®_beacon_list);
3013 spin_unlock_bh(®_pending_beacons_lock);
3016 static void reg_process_self_managed_hints(void)
3018 struct cfg80211_registered_device *rdev;
3019 struct wiphy *wiphy;
3020 const struct ieee80211_regdomain *tmp;
3021 const struct ieee80211_regdomain *regd;
3022 enum nl80211_band band;
3023 struct regulatory_request request = {};
3025 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
3026 wiphy = &rdev->wiphy;
3028 spin_lock(®_requests_lock);
3029 regd = rdev->requested_regd;
3030 rdev->requested_regd = NULL;
3031 spin_unlock(®_requests_lock);
3036 tmp = get_wiphy_regdom(wiphy);
3037 rcu_assign_pointer(wiphy->regd, regd);
3038 rcu_free_regdom(tmp);
3040 for (band = 0; band < NUM_NL80211_BANDS; band++)
3041 handle_band_custom(wiphy, wiphy->bands[band], regd);
3043 reg_process_ht_flags(wiphy);
3045 request.wiphy_idx = get_wiphy_idx(wiphy);
3046 request.alpha2[0] = regd->alpha2[0];
3047 request.alpha2[1] = regd->alpha2[1];
3048 request.initiator = NL80211_REGDOM_SET_BY_DRIVER;
3050 nl80211_send_wiphy_reg_change_event(&request);
3053 reg_check_channels();
3056 static void reg_todo(struct work_struct *work)
3059 reg_process_pending_hints();
3060 reg_process_pending_beacon_hints();
3061 reg_process_self_managed_hints();
3065 static void queue_regulatory_request(struct regulatory_request *request)
3067 request->alpha2[0] = toupper(request->alpha2[0]);
3068 request->alpha2[1] = toupper(request->alpha2[1]);
3070 spin_lock(®_requests_lock);
3071 list_add_tail(&request->list, ®_requests_list);
3072 spin_unlock(®_requests_lock);
3074 schedule_work(®_work);
3078 * Core regulatory hint -- happens during cfg80211_init()
3079 * and when we restore regulatory settings.
3081 static int regulatory_hint_core(const char *alpha2)
3083 struct regulatory_request *request;
3085 request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL);
3089 request->alpha2[0] = alpha2[0];
3090 request->alpha2[1] = alpha2[1];
3091 request->initiator = NL80211_REGDOM_SET_BY_CORE;
3092 request->wiphy_idx = WIPHY_IDX_INVALID;
3094 queue_regulatory_request(request);
3100 int regulatory_hint_user(const char *alpha2,
3101 enum nl80211_user_reg_hint_type user_reg_hint_type)
3103 struct regulatory_request *request;
3105 if (WARN_ON(!alpha2))
3108 request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL);
3112 request->wiphy_idx = WIPHY_IDX_INVALID;
3113 request->alpha2[0] = alpha2[0];
3114 request->alpha2[1] = alpha2[1];
3115 request->initiator = NL80211_REGDOM_SET_BY_USER;
3116 request->user_reg_hint_type = user_reg_hint_type;
3118 /* Allow calling CRDA again */
3119 reset_crda_timeouts();
3121 queue_regulatory_request(request);
3126 int regulatory_hint_indoor(bool is_indoor, u32 portid)
3128 spin_lock(®_indoor_lock);
3130 /* It is possible that more than one user space process is trying to
3131 * configure the indoor setting. To handle such cases, clear the indoor
3132 * setting in case that some process does not think that the device
3133 * is operating in an indoor environment. In addition, if a user space
3134 * process indicates that it is controlling the indoor setting, save its
3135 * portid, i.e., make it the owner.
3137 reg_is_indoor = is_indoor;
3138 if (reg_is_indoor) {
3139 if (!reg_is_indoor_portid)
3140 reg_is_indoor_portid = portid;
3142 reg_is_indoor_portid = 0;
3145 spin_unlock(®_indoor_lock);
3148 reg_check_channels();
3153 void regulatory_netlink_notify(u32 portid)
3155 spin_lock(®_indoor_lock);
3157 if (reg_is_indoor_portid != portid) {
3158 spin_unlock(®_indoor_lock);
3162 reg_is_indoor = false;
3163 reg_is_indoor_portid = 0;
3165 spin_unlock(®_indoor_lock);
3167 reg_check_channels();
3171 int regulatory_hint(struct wiphy *wiphy, const char *alpha2)
3173 struct regulatory_request *request;
3175 if (WARN_ON(!alpha2 || !wiphy))
3178 wiphy->regulatory_flags &= ~REGULATORY_CUSTOM_REG;
3180 request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL);
3184 request->wiphy_idx = get_wiphy_idx(wiphy);
3186 request->alpha2[0] = alpha2[0];
3187 request->alpha2[1] = alpha2[1];
3188 request->initiator = NL80211_REGDOM_SET_BY_DRIVER;
3190 /* Allow calling CRDA again */
3191 reset_crda_timeouts();
3193 queue_regulatory_request(request);
3197 EXPORT_SYMBOL(regulatory_hint);
3199 void regulatory_hint_country_ie(struct wiphy *wiphy, enum nl80211_band band,
3200 const u8 *country_ie, u8 country_ie_len)
3203 enum environment_cap env = ENVIRON_ANY;
3204 struct regulatory_request *request = NULL, *lr;
3206 /* IE len must be evenly divisible by 2 */
3207 if (country_ie_len & 0x01)
3210 if (country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
3213 request = kzalloc(sizeof(*request), GFP_KERNEL);
3217 alpha2[0] = country_ie[0];
3218 alpha2[1] = country_ie[1];
3220 if (country_ie[2] == 'I')
3221 env = ENVIRON_INDOOR;
3222 else if (country_ie[2] == 'O')
3223 env = ENVIRON_OUTDOOR;
3226 lr = get_last_request();
3232 * We will run this only upon a successful connection on cfg80211.
3233 * We leave conflict resolution to the workqueue, where can hold
3236 if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE &&
3237 lr->wiphy_idx != WIPHY_IDX_INVALID)
3240 request->wiphy_idx = get_wiphy_idx(wiphy);
3241 request->alpha2[0] = alpha2[0];
3242 request->alpha2[1] = alpha2[1];
3243 request->initiator = NL80211_REGDOM_SET_BY_COUNTRY_IE;
3244 request->country_ie_env = env;
3246 /* Allow calling CRDA again */
3247 reset_crda_timeouts();
3249 queue_regulatory_request(request);
3256 static void restore_alpha2(char *alpha2, bool reset_user)
3258 /* indicates there is no alpha2 to consider for restoration */
3262 /* The user setting has precedence over the module parameter */
3263 if (is_user_regdom_saved()) {
3264 /* Unless we're asked to ignore it and reset it */
3266 pr_debug("Restoring regulatory settings including user preference\n");
3267 user_alpha2[0] = '9';
3268 user_alpha2[1] = '7';
3271 * If we're ignoring user settings, we still need to
3272 * check the module parameter to ensure we put things
3273 * back as they were for a full restore.
3275 if (!is_world_regdom(ieee80211_regdom)) {
3276 pr_debug("Keeping preference on module parameter ieee80211_regdom: %c%c\n",
3277 ieee80211_regdom[0], ieee80211_regdom[1]);
3278 alpha2[0] = ieee80211_regdom[0];
3279 alpha2[1] = ieee80211_regdom[1];
3282 pr_debug("Restoring regulatory settings while preserving user preference for: %c%c\n",
3283 user_alpha2[0], user_alpha2[1]);
3284 alpha2[0] = user_alpha2[0];
3285 alpha2[1] = user_alpha2[1];
3287 } else if (!is_world_regdom(ieee80211_regdom)) {
3288 pr_debug("Keeping preference on module parameter ieee80211_regdom: %c%c\n",
3289 ieee80211_regdom[0], ieee80211_regdom[1]);
3290 alpha2[0] = ieee80211_regdom[0];
3291 alpha2[1] = ieee80211_regdom[1];
3293 pr_debug("Restoring regulatory settings\n");
3296 static void restore_custom_reg_settings(struct wiphy *wiphy)
3298 struct ieee80211_supported_band *sband;
3299 enum nl80211_band band;
3300 struct ieee80211_channel *chan;
3303 for (band = 0; band < NUM_NL80211_BANDS; band++) {
3304 sband = wiphy->bands[band];
3307 for (i = 0; i < sband->n_channels; i++) {
3308 chan = &sband->channels[i];
3309 chan->flags = chan->orig_flags;
3310 chan->max_antenna_gain = chan->orig_mag;
3311 chan->max_power = chan->orig_mpwr;
3312 chan->beacon_found = false;
3318 * Restoring regulatory settings involves ingoring any
3319 * possibly stale country IE information and user regulatory
3320 * settings if so desired, this includes any beacon hints
3321 * learned as we could have traveled outside to another country
3322 * after disconnection. To restore regulatory settings we do
3323 * exactly what we did at bootup:
3325 * - send a core regulatory hint
3326 * - send a user regulatory hint if applicable
3328 * Device drivers that send a regulatory hint for a specific country
3329 * keep their own regulatory domain on wiphy->regd so that does
3330 * not need to be remembered.
3332 static void restore_regulatory_settings(bool reset_user, bool cached)
3335 char world_alpha2[2];
3336 struct reg_beacon *reg_beacon, *btmp;
3337 LIST_HEAD(tmp_reg_req_list);
3338 struct cfg80211_registered_device *rdev;
3343 * Clear the indoor setting in case that it is not controlled by user
3344 * space, as otherwise there is no guarantee that the device is still
3345 * operating in an indoor environment.
3347 spin_lock(®_indoor_lock);
3348 if (reg_is_indoor && !reg_is_indoor_portid) {
3349 reg_is_indoor = false;
3350 reg_check_channels();
3352 spin_unlock(®_indoor_lock);
3354 reset_regdomains(true, &world_regdom);
3355 restore_alpha2(alpha2, reset_user);
3358 * If there's any pending requests we simply
3359 * stash them to a temporary pending queue and
3360 * add then after we've restored regulatory
3363 spin_lock(®_requests_lock);
3364 list_splice_tail_init(®_requests_list, &tmp_reg_req_list);
3365 spin_unlock(®_requests_lock);
3367 /* Clear beacon hints */
3368 spin_lock_bh(®_pending_beacons_lock);
3369 list_for_each_entry_safe(reg_beacon, btmp, ®_pending_beacons, list) {
3370 list_del(®_beacon->list);
3373 spin_unlock_bh(®_pending_beacons_lock);
3375 list_for_each_entry_safe(reg_beacon, btmp, ®_beacon_list, list) {
3376 list_del(®_beacon->list);
3380 /* First restore to the basic regulatory settings */
3381 world_alpha2[0] = cfg80211_world_regdom->alpha2[0];
3382 world_alpha2[1] = cfg80211_world_regdom->alpha2[1];
3384 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
3385 if (rdev->wiphy.regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED)
3387 if (rdev->wiphy.regulatory_flags & REGULATORY_CUSTOM_REG)
3388 restore_custom_reg_settings(&rdev->wiphy);
3391 if (cached && (!is_an_alpha2(alpha2) ||
3392 !IS_ERR_OR_NULL(cfg80211_user_regdom))) {
3393 reset_regdomains(false, cfg80211_world_regdom);
3394 update_all_wiphy_regulatory(NL80211_REGDOM_SET_BY_CORE);
3395 print_regdomain(get_cfg80211_regdom());
3396 nl80211_send_reg_change_event(&core_request_world);
3397 reg_set_request_processed();
3399 if (is_an_alpha2(alpha2) &&
3400 !regulatory_hint_user(alpha2, NL80211_USER_REG_HINT_USER)) {
3401 struct regulatory_request *ureq;
3403 spin_lock(®_requests_lock);
3404 ureq = list_last_entry(®_requests_list,
3405 struct regulatory_request,
3407 list_del(&ureq->list);
3408 spin_unlock(®_requests_lock);
3410 notify_self_managed_wiphys(ureq);
3411 reg_update_last_request(ureq);
3412 set_regdom(reg_copy_regd(cfg80211_user_regdom),
3413 REGD_SOURCE_CACHED);
3416 regulatory_hint_core(world_alpha2);
3419 * This restores the ieee80211_regdom module parameter
3420 * preference or the last user requested regulatory
3421 * settings, user regulatory settings takes precedence.
3423 if (is_an_alpha2(alpha2))
3424 regulatory_hint_user(alpha2, NL80211_USER_REG_HINT_USER);
3427 spin_lock(®_requests_lock);
3428 list_splice_tail_init(&tmp_reg_req_list, ®_requests_list);
3429 spin_unlock(®_requests_lock);
3431 pr_debug("Kicking the queue\n");
3433 schedule_work(®_work);
3436 static bool is_wiphy_all_set_reg_flag(enum ieee80211_regulatory_flags flag)
3438 struct cfg80211_registered_device *rdev;
3439 struct wireless_dev *wdev;
3441 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
3442 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
3444 if (!(wdev->wiphy->regulatory_flags & flag)) {
3455 void regulatory_hint_disconnect(void)
3457 /* Restore of regulatory settings is not required when wiphy(s)
3458 * ignore IE from connected access point but clearance of beacon hints
3459 * is required when wiphy(s) supports beacon hints.
3461 if (is_wiphy_all_set_reg_flag(REGULATORY_COUNTRY_IE_IGNORE)) {
3462 struct reg_beacon *reg_beacon, *btmp;
3464 if (is_wiphy_all_set_reg_flag(REGULATORY_DISABLE_BEACON_HINTS))
3467 spin_lock_bh(®_pending_beacons_lock);
3468 list_for_each_entry_safe(reg_beacon, btmp,
3469 ®_pending_beacons, list) {
3470 list_del(®_beacon->list);
3473 spin_unlock_bh(®_pending_beacons_lock);
3475 list_for_each_entry_safe(reg_beacon, btmp,
3476 ®_beacon_list, list) {
3477 list_del(®_beacon->list);
3484 pr_debug("All devices are disconnected, going to restore regulatory settings\n");
3485 restore_regulatory_settings(false, true);
3488 static bool freq_is_chan_12_13_14(u32 freq)
3490 if (freq == ieee80211_channel_to_frequency(12, NL80211_BAND_2GHZ) ||
3491 freq == ieee80211_channel_to_frequency(13, NL80211_BAND_2GHZ) ||
3492 freq == ieee80211_channel_to_frequency(14, NL80211_BAND_2GHZ))
3497 static bool pending_reg_beacon(struct ieee80211_channel *beacon_chan)
3499 struct reg_beacon *pending_beacon;
3501 list_for_each_entry(pending_beacon, ®_pending_beacons, list)
3502 if (ieee80211_channel_equal(beacon_chan,
3503 &pending_beacon->chan))
3508 int regulatory_hint_found_beacon(struct wiphy *wiphy,
3509 struct ieee80211_channel *beacon_chan,
3512 struct reg_beacon *reg_beacon;
3515 if (beacon_chan->beacon_found ||
3516 beacon_chan->flags & IEEE80211_CHAN_RADAR ||
3517 (beacon_chan->band == NL80211_BAND_2GHZ &&
3518 !freq_is_chan_12_13_14(beacon_chan->center_freq)))
3521 spin_lock_bh(®_pending_beacons_lock);
3522 processing = pending_reg_beacon(beacon_chan);
3523 spin_unlock_bh(®_pending_beacons_lock);
3528 reg_beacon = kzalloc(sizeof(struct reg_beacon), gfp);
3532 pr_debug("Found new beacon on frequency: %d.%03d MHz (Ch %d) on %s\n",
3533 beacon_chan->center_freq, beacon_chan->freq_offset,
3534 ieee80211_freq_khz_to_channel(
3535 ieee80211_channel_to_khz(beacon_chan)),
3538 memcpy(®_beacon->chan, beacon_chan,
3539 sizeof(struct ieee80211_channel));
3542 * Since we can be called from BH or and non-BH context
3543 * we must use spin_lock_bh()
3545 spin_lock_bh(®_pending_beacons_lock);
3546 list_add_tail(®_beacon->list, ®_pending_beacons);
3547 spin_unlock_bh(®_pending_beacons_lock);
3549 schedule_work(®_work);
3554 static void print_rd_rules(const struct ieee80211_regdomain *rd)
3557 const struct ieee80211_reg_rule *reg_rule = NULL;
3558 const struct ieee80211_freq_range *freq_range = NULL;
3559 const struct ieee80211_power_rule *power_rule = NULL;
3560 char bw[32], cac_time[32];
3562 pr_debug(" (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp), (dfs_cac_time)\n");
3564 for (i = 0; i < rd->n_reg_rules; i++) {
3565 reg_rule = &rd->reg_rules[i];
3566 freq_range = ®_rule->freq_range;
3567 power_rule = ®_rule->power_rule;
3569 if (reg_rule->flags & NL80211_RRF_AUTO_BW)
3570 snprintf(bw, sizeof(bw), "%d KHz, %d KHz AUTO",
3571 freq_range->max_bandwidth_khz,
3572 reg_get_max_bandwidth(rd, reg_rule));
3574 snprintf(bw, sizeof(bw), "%d KHz",
3575 freq_range->max_bandwidth_khz);
3577 if (reg_rule->flags & NL80211_RRF_DFS)
3578 scnprintf(cac_time, sizeof(cac_time), "%u s",
3579 reg_rule->dfs_cac_ms/1000);
3581 scnprintf(cac_time, sizeof(cac_time), "N/A");
3585 * There may not be documentation for max antenna gain
3586 * in certain regions
3588 if (power_rule->max_antenna_gain)
3589 pr_debug(" (%d KHz - %d KHz @ %s), (%d mBi, %d mBm), (%s)\n",
3590 freq_range->start_freq_khz,
3591 freq_range->end_freq_khz,
3593 power_rule->max_antenna_gain,
3594 power_rule->max_eirp,
3597 pr_debug(" (%d KHz - %d KHz @ %s), (N/A, %d mBm), (%s)\n",
3598 freq_range->start_freq_khz,
3599 freq_range->end_freq_khz,
3601 power_rule->max_eirp,
3606 bool reg_supported_dfs_region(enum nl80211_dfs_regions dfs_region)
3608 switch (dfs_region) {
3609 case NL80211_DFS_UNSET:
3610 case NL80211_DFS_FCC:
3611 case NL80211_DFS_ETSI:
3612 case NL80211_DFS_JP:
3615 pr_debug("Ignoring unknown DFS master region: %d\n", dfs_region);
3620 static void print_regdomain(const struct ieee80211_regdomain *rd)
3622 struct regulatory_request *lr = get_last_request();
3624 if (is_intersected_alpha2(rd->alpha2)) {
3625 if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) {
3626 struct cfg80211_registered_device *rdev;
3627 rdev = cfg80211_rdev_by_wiphy_idx(lr->wiphy_idx);
3629 pr_debug("Current regulatory domain updated by AP to: %c%c\n",
3630 rdev->country_ie_alpha2[0],
3631 rdev->country_ie_alpha2[1]);
3633 pr_debug("Current regulatory domain intersected:\n");
3635 pr_debug("Current regulatory domain intersected:\n");
3636 } else if (is_world_regdom(rd->alpha2)) {
3637 pr_debug("World regulatory domain updated:\n");
3639 if (is_unknown_alpha2(rd->alpha2))
3640 pr_debug("Regulatory domain changed to driver built-in settings (unknown country)\n");
3642 if (reg_request_cell_base(lr))
3643 pr_debug("Regulatory domain changed to country: %c%c by Cell Station\n",
3644 rd->alpha2[0], rd->alpha2[1]);
3646 pr_debug("Regulatory domain changed to country: %c%c\n",
3647 rd->alpha2[0], rd->alpha2[1]);
3651 pr_debug(" DFS Master region: %s", reg_dfs_region_str(rd->dfs_region));
3655 static void print_regdomain_info(const struct ieee80211_regdomain *rd)
3657 pr_debug("Regulatory domain: %c%c\n", rd->alpha2[0], rd->alpha2[1]);
3661 static int reg_set_rd_core(const struct ieee80211_regdomain *rd)
3663 if (!is_world_regdom(rd->alpha2))
3665 update_world_regdomain(rd);
3669 static int reg_set_rd_user(const struct ieee80211_regdomain *rd,
3670 struct regulatory_request *user_request)
3672 const struct ieee80211_regdomain *intersected_rd = NULL;
3674 if (!regdom_changes(rd->alpha2))
3677 if (!is_valid_rd(rd)) {
3678 pr_err("Invalid regulatory domain detected: %c%c\n",
3679 rd->alpha2[0], rd->alpha2[1]);
3680 print_regdomain_info(rd);
3684 if (!user_request->intersect) {
3685 reset_regdomains(false, rd);
3689 intersected_rd = regdom_intersect(rd, get_cfg80211_regdom());
3690 if (!intersected_rd)
3695 reset_regdomains(false, intersected_rd);
3700 static int reg_set_rd_driver(const struct ieee80211_regdomain *rd,
3701 struct regulatory_request *driver_request)
3703 const struct ieee80211_regdomain *regd;
3704 const struct ieee80211_regdomain *intersected_rd = NULL;
3705 const struct ieee80211_regdomain *tmp;
3706 struct wiphy *request_wiphy;
3708 if (is_world_regdom(rd->alpha2))
3711 if (!regdom_changes(rd->alpha2))
3714 if (!is_valid_rd(rd)) {
3715 pr_err("Invalid regulatory domain detected: %c%c\n",
3716 rd->alpha2[0], rd->alpha2[1]);
3717 print_regdomain_info(rd);
3721 request_wiphy = wiphy_idx_to_wiphy(driver_request->wiphy_idx);
3725 if (!driver_request->intersect) {
3726 if (request_wiphy->regd)
3729 regd = reg_copy_regd(rd);
3731 return PTR_ERR(regd);
3733 rcu_assign_pointer(request_wiphy->regd, regd);
3734 reset_regdomains(false, rd);
3738 intersected_rd = regdom_intersect(rd, get_cfg80211_regdom());
3739 if (!intersected_rd)
3743 * We can trash what CRDA provided now.
3744 * However if a driver requested this specific regulatory
3745 * domain we keep it for its private use
3747 tmp = get_wiphy_regdom(request_wiphy);
3748 rcu_assign_pointer(request_wiphy->regd, rd);
3749 rcu_free_regdom(tmp);
3753 reset_regdomains(false, intersected_rd);
3758 static int reg_set_rd_country_ie(const struct ieee80211_regdomain *rd,
3759 struct regulatory_request *country_ie_request)
3761 struct wiphy *request_wiphy;
3763 if (!is_alpha2_set(rd->alpha2) && !is_an_alpha2(rd->alpha2) &&
3764 !is_unknown_alpha2(rd->alpha2))
3768 * Lets only bother proceeding on the same alpha2 if the current
3769 * rd is non static (it means CRDA was present and was used last)
3770 * and the pending request came in from a country IE
3773 if (!is_valid_rd(rd)) {
3774 pr_err("Invalid regulatory domain detected: %c%c\n",
3775 rd->alpha2[0], rd->alpha2[1]);
3776 print_regdomain_info(rd);
3780 request_wiphy = wiphy_idx_to_wiphy(country_ie_request->wiphy_idx);
3784 if (country_ie_request->intersect)
3787 reset_regdomains(false, rd);
3792 * Use this call to set the current regulatory domain. Conflicts with
3793 * multiple drivers can be ironed out later. Caller must've already
3794 * kmalloc'd the rd structure.
3796 int set_regdom(const struct ieee80211_regdomain *rd,
3797 enum ieee80211_regd_source regd_src)
3799 struct regulatory_request *lr;
3800 bool user_reset = false;
3803 if (IS_ERR_OR_NULL(rd))
3806 if (!reg_is_valid_request(rd->alpha2)) {
3811 if (regd_src == REGD_SOURCE_CRDA)
3812 reset_crda_timeouts();
3814 lr = get_last_request();
3816 /* Note that this doesn't update the wiphys, this is done below */
3817 switch (lr->initiator) {
3818 case NL80211_REGDOM_SET_BY_CORE:
3819 r = reg_set_rd_core(rd);
3821 case NL80211_REGDOM_SET_BY_USER:
3822 cfg80211_save_user_regdom(rd);
3823 r = reg_set_rd_user(rd, lr);
3826 case NL80211_REGDOM_SET_BY_DRIVER:
3827 r = reg_set_rd_driver(rd, lr);
3829 case NL80211_REGDOM_SET_BY_COUNTRY_IE:
3830 r = reg_set_rd_country_ie(rd, lr);
3833 WARN(1, "invalid initiator %d\n", lr->initiator);
3841 reg_set_request_processed();
3844 /* Back to world regulatory in case of errors */
3845 restore_regulatory_settings(user_reset, false);
3852 /* This would make this whole thing pointless */
3853 if (WARN_ON(!lr->intersect && rd != get_cfg80211_regdom()))
3856 /* update all wiphys now with the new established regulatory domain */
3857 update_all_wiphy_regulatory(lr->initiator);
3859 print_regdomain(get_cfg80211_regdom());
3861 nl80211_send_reg_change_event(lr);
3863 reg_set_request_processed();
3868 static int __regulatory_set_wiphy_regd(struct wiphy *wiphy,
3869 struct ieee80211_regdomain *rd)
3871 const struct ieee80211_regdomain *regd;
3872 const struct ieee80211_regdomain *prev_regd;
3873 struct cfg80211_registered_device *rdev;
3875 if (WARN_ON(!wiphy || !rd))
3878 if (WARN(!(wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED),
3879 "wiphy should have REGULATORY_WIPHY_SELF_MANAGED\n"))
3882 if (WARN(!is_valid_rd(rd), "Invalid regulatory domain detected\n")) {
3883 print_regdomain_info(rd);
3887 regd = reg_copy_regd(rd);
3889 return PTR_ERR(regd);
3891 rdev = wiphy_to_rdev(wiphy);
3893 spin_lock(®_requests_lock);
3894 prev_regd = rdev->requested_regd;
3895 rdev->requested_regd = regd;
3896 spin_unlock(®_requests_lock);
3902 int regulatory_set_wiphy_regd(struct wiphy *wiphy,
3903 struct ieee80211_regdomain *rd)
3905 int ret = __regulatory_set_wiphy_regd(wiphy, rd);
3910 schedule_work(®_work);
3913 EXPORT_SYMBOL(regulatory_set_wiphy_regd);
3915 int regulatory_set_wiphy_regd_sync_rtnl(struct wiphy *wiphy,
3916 struct ieee80211_regdomain *rd)
3922 ret = __regulatory_set_wiphy_regd(wiphy, rd);
3926 /* process the request immediately */
3927 reg_process_self_managed_hints();
3930 EXPORT_SYMBOL(regulatory_set_wiphy_regd_sync_rtnl);
3932 void wiphy_regulatory_register(struct wiphy *wiphy)
3934 struct regulatory_request *lr = get_last_request();
3936 /* self-managed devices ignore beacon hints and country IE */
3937 if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) {
3938 wiphy->regulatory_flags |= REGULATORY_DISABLE_BEACON_HINTS |
3939 REGULATORY_COUNTRY_IE_IGNORE;
3942 * The last request may have been received before this
3943 * registration call. Call the driver notifier if
3944 * initiator is USER.
3946 if (lr->initiator == NL80211_REGDOM_SET_BY_USER)
3947 reg_call_notifier(wiphy, lr);
3950 if (!reg_dev_ignore_cell_hint(wiphy))
3951 reg_num_devs_support_basehint++;
3953 wiphy_update_regulatory(wiphy, lr->initiator);
3954 wiphy_all_share_dfs_chan_state(wiphy);
3957 void wiphy_regulatory_deregister(struct wiphy *wiphy)
3959 struct wiphy *request_wiphy = NULL;
3960 struct regulatory_request *lr;
3962 lr = get_last_request();
3964 if (!reg_dev_ignore_cell_hint(wiphy))
3965 reg_num_devs_support_basehint--;
3967 rcu_free_regdom(get_wiphy_regdom(wiphy));
3968 RCU_INIT_POINTER(wiphy->regd, NULL);
3971 request_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx);
3973 if (!request_wiphy || request_wiphy != wiphy)
3976 lr->wiphy_idx = WIPHY_IDX_INVALID;
3977 lr->country_ie_env = ENVIRON_ANY;
3981 * See FCC notices for UNII band definitions
3982 * 5GHz: https://www.fcc.gov/document/5-ghz-unlicensed-spectrum-unii
3983 * 6GHz: https://www.fcc.gov/document/fcc-proposes-more-spectrum-unlicensed-use-0
3985 int cfg80211_get_unii(int freq)
3988 if (freq >= 5150 && freq <= 5250)
3992 if (freq > 5250 && freq <= 5350)
3996 if (freq > 5350 && freq <= 5470)
4000 if (freq > 5470 && freq <= 5725)
4004 if (freq > 5725 && freq <= 5825)
4008 if (freq > 5925 && freq <= 6425)
4012 if (freq > 6425 && freq <= 6525)
4016 if (freq > 6525 && freq <= 6875)
4020 if (freq > 6875 && freq <= 7125)
4026 bool regulatory_indoor_allowed(void)
4028 return reg_is_indoor;
4031 bool regulatory_pre_cac_allowed(struct wiphy *wiphy)
4033 const struct ieee80211_regdomain *regd = NULL;
4034 const struct ieee80211_regdomain *wiphy_regd = NULL;
4035 bool pre_cac_allowed = false;
4039 regd = rcu_dereference(cfg80211_regdomain);
4040 wiphy_regd = rcu_dereference(wiphy->regd);
4042 if (regd->dfs_region == NL80211_DFS_ETSI)
4043 pre_cac_allowed = true;
4047 return pre_cac_allowed;
4050 if (regd->dfs_region == wiphy_regd->dfs_region &&
4051 wiphy_regd->dfs_region == NL80211_DFS_ETSI)
4052 pre_cac_allowed = true;
4056 return pre_cac_allowed;
4058 EXPORT_SYMBOL(regulatory_pre_cac_allowed);
4060 static void cfg80211_check_and_end_cac(struct cfg80211_registered_device *rdev)
4062 struct wireless_dev *wdev;
4063 /* If we finished CAC or received radar, we should end any
4064 * CAC running on the same channels.
4065 * the check !cfg80211_chandef_dfs_usable contain 2 options:
4066 * either all channels are available - those the CAC_FINISHED
4067 * event has effected another wdev state, or there is a channel
4068 * in unavailable state in wdev chandef - those the RADAR_DETECTED
4069 * event has effected another wdev state.
4070 * In both cases we should end the CAC on the wdev.
4072 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
4073 if (wdev->cac_started &&
4074 !cfg80211_chandef_dfs_usable(&rdev->wiphy, &wdev->chandef))
4075 rdev_end_cac(rdev, wdev->netdev);
4079 void regulatory_propagate_dfs_state(struct wiphy *wiphy,
4080 struct cfg80211_chan_def *chandef,
4081 enum nl80211_dfs_state dfs_state,
4082 enum nl80211_radar_event event)
4084 struct cfg80211_registered_device *rdev;
4088 if (WARN_ON(!cfg80211_chandef_valid(chandef)))
4091 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
4092 if (wiphy == &rdev->wiphy)
4095 if (!reg_dfs_domain_same(wiphy, &rdev->wiphy))
4098 if (!ieee80211_get_channel(&rdev->wiphy,
4099 chandef->chan->center_freq))
4102 cfg80211_set_dfs_state(&rdev->wiphy, chandef, dfs_state);
4104 if (event == NL80211_RADAR_DETECTED ||
4105 event == NL80211_RADAR_CAC_FINISHED) {
4106 cfg80211_sched_dfs_chan_update(rdev);
4107 cfg80211_check_and_end_cac(rdev);
4110 nl80211_radar_notify(rdev, chandef, event, NULL, GFP_KERNEL);
4114 static int __init regulatory_init_db(void)
4119 * It's possible that - due to other bugs/issues - cfg80211
4120 * never called regulatory_init() below, or that it failed;
4121 * in that case, don't try to do any further work here as
4122 * it's doomed to lead to crashes.
4124 if (IS_ERR_OR_NULL(reg_pdev))
4127 err = load_builtin_regdb_keys();
4131 /* We always try to get an update for the static regdomain */
4132 err = regulatory_hint_core(cfg80211_world_regdom->alpha2);
4134 if (err == -ENOMEM) {
4135 platform_device_unregister(reg_pdev);
4139 * N.B. kobject_uevent_env() can fail mainly for when we're out
4140 * memory which is handled and propagated appropriately above
4141 * but it can also fail during a netlink_broadcast() or during
4142 * early boot for call_usermodehelper(). For now treat these
4143 * errors as non-fatal.
4145 pr_err("kobject_uevent_env() was unable to call CRDA during init\n");
4149 * Finally, if the user set the module parameter treat it
4152 if (!is_world_regdom(ieee80211_regdom))
4153 regulatory_hint_user(ieee80211_regdom,
4154 NL80211_USER_REG_HINT_USER);
4159 late_initcall(regulatory_init_db);
4162 int __init regulatory_init(void)
4164 reg_pdev = platform_device_register_simple("regulatory", 0, NULL, 0);
4165 if (IS_ERR(reg_pdev))
4166 return PTR_ERR(reg_pdev);
4168 spin_lock_init(®_requests_lock);
4169 spin_lock_init(®_pending_beacons_lock);
4170 spin_lock_init(®_indoor_lock);
4172 rcu_assign_pointer(cfg80211_regdomain, cfg80211_world_regdom);
4174 user_alpha2[0] = '9';
4175 user_alpha2[1] = '7';
4178 return regulatory_init_db();
4184 void regulatory_exit(void)
4186 struct regulatory_request *reg_request, *tmp;
4187 struct reg_beacon *reg_beacon, *btmp;
4189 cancel_work_sync(®_work);
4190 cancel_crda_timeout_sync();
4191 cancel_delayed_work_sync(®_check_chans);
4193 /* Lock to suppress warnings */
4195 reset_regdomains(true, NULL);
4198 dev_set_uevent_suppress(®_pdev->dev, true);
4200 platform_device_unregister(reg_pdev);
4202 list_for_each_entry_safe(reg_beacon, btmp, ®_pending_beacons, list) {
4203 list_del(®_beacon->list);
4207 list_for_each_entry_safe(reg_beacon, btmp, ®_beacon_list, list) {
4208 list_del(®_beacon->list);
4212 list_for_each_entry_safe(reg_request, tmp, ®_requests_list, list) {
4213 list_del(®_request->list);
4217 if (!IS_ERR_OR_NULL(regdb))
4219 if (!IS_ERR_OR_NULL(cfg80211_user_regdom))
4220 kfree(cfg80211_user_regdom);
4222 free_regdb_keyring();