2 * Copyright 2002-2005, Instant802 Networks, Inc.
3 * Copyright 2005-2006, Devicescape Software, Inc.
4 * Copyright 2007 Johannes Berg <johannes@sipsolutions.net>
5 * Copyright 2008-2011 Luis R. Rodriguez <mcgrof@qca.qualcomm.com>
6 * Copyright 2013-2014 Intel Mobile Communications GmbH
7 * Copyright 2017 Intel Deutschland GmbH
8 * Copyright (C) 2018 - 2021 Intel Corporation
10 * Permission to use, copy, modify, and/or distribute this software for any
11 * purpose with or without fee is hereby granted, provided that the above
12 * copyright notice and this permission notice appear in all copies.
14 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
15 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
16 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
17 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
18 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
19 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
20 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
25 * DOC: Wireless regulatory infrastructure
27 * The usual implementation is for a driver to read a device EEPROM to
28 * determine which regulatory domain it should be operating under, then
29 * looking up the allowable channels in a driver-local table and finally
30 * registering those channels in the wiphy structure.
32 * Another set of compliance enforcement is for drivers to use their
33 * own compliance limits which can be stored on the EEPROM. The host
34 * driver or firmware may ensure these are used.
36 * In addition to all this we provide an extra layer of regulatory
37 * conformance. For drivers which do not have any regulatory
38 * information CRDA provides the complete regulatory solution.
39 * For others it provides a community effort on further restrictions
40 * to enhance compliance.
42 * Note: When number of rules --> infinity we will not be able to
43 * index on alpha2 any more, instead we'll probably have to
44 * rely on some SHA1 checksum of the regdomain for example.
48 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
50 #include <linux/kernel.h>
51 #include <linux/export.h>
52 #include <linux/slab.h>
53 #include <linux/list.h>
54 #include <linux/ctype.h>
55 #include <linux/nl80211.h>
56 #include <linux/platform_device.h>
57 #include <linux/verification.h>
58 #include <linux/moduleparam.h>
59 #include <linux/firmware.h>
60 #include <net/cfg80211.h>
67 * Grace period we give before making sure all current interfaces reside on
68 * channels allowed by the current regulatory domain.
70 #define REG_ENFORCE_GRACE_MS 60000
73 * enum reg_request_treatment - regulatory request treatment
75 * @REG_REQ_OK: continue processing the regulatory request
76 * @REG_REQ_IGNORE: ignore the regulatory request
77 * @REG_REQ_INTERSECT: the regulatory domain resulting from this request should
78 * be intersected with the current one.
79 * @REG_REQ_ALREADY_SET: the regulatory request will not change the current
80 * regulatory settings, and no further processing is required.
82 enum reg_request_treatment
{
89 static struct regulatory_request core_request_world
= {
90 .initiator
= NL80211_REGDOM_SET_BY_CORE
,
95 .country_ie_env
= ENVIRON_ANY
,
99 * Receipt of information from last regulatory request,
100 * protected by RTNL (and can be accessed with RCU protection)
102 static struct regulatory_request __rcu
*last_request
=
103 (void __force __rcu
*)&core_request_world
;
105 /* To trigger userspace events and load firmware */
106 static struct platform_device
*reg_pdev
;
109 * Central wireless core regulatory domains, we only need two,
110 * the current one and a world regulatory domain in case we have no
111 * information to give us an alpha2.
112 * (protected by RTNL, can be read under RCU)
114 const struct ieee80211_regdomain __rcu
*cfg80211_regdomain
;
117 * Number of devices that registered to the core
118 * that support cellular base station regulatory hints
119 * (protected by RTNL)
121 static int reg_num_devs_support_basehint
;
124 * State variable indicating if the platform on which the devices
125 * are attached is operating in an indoor environment. The state variable
126 * is relevant for all registered devices.
128 static bool reg_is_indoor
;
129 static DEFINE_SPINLOCK(reg_indoor_lock
);
131 /* Used to track the userspace process controlling the indoor setting */
132 static u32 reg_is_indoor_portid
;
134 static void restore_regulatory_settings(bool reset_user
, bool cached
);
135 static void print_regdomain(const struct ieee80211_regdomain
*rd
);
137 static const struct ieee80211_regdomain
*get_cfg80211_regdom(void)
139 return rcu_dereference_rtnl(cfg80211_regdomain
);
143 * Returns the regulatory domain associated with the wiphy.
145 * Requires any of RTNL, wiphy mutex or RCU protection.
147 const struct ieee80211_regdomain
*get_wiphy_regdom(struct wiphy
*wiphy
)
149 return rcu_dereference_check(wiphy
->regd
,
150 lockdep_is_held(&wiphy
->mtx
) ||
151 lockdep_rtnl_is_held());
153 EXPORT_SYMBOL(get_wiphy_regdom
);
155 static const char *reg_dfs_region_str(enum nl80211_dfs_regions dfs_region
)
157 switch (dfs_region
) {
158 case NL80211_DFS_UNSET
:
160 case NL80211_DFS_FCC
:
162 case NL80211_DFS_ETSI
:
170 enum nl80211_dfs_regions
reg_get_dfs_region(struct wiphy
*wiphy
)
172 const struct ieee80211_regdomain
*regd
= NULL
;
173 const struct ieee80211_regdomain
*wiphy_regd
= NULL
;
176 regd
= get_cfg80211_regdom();
181 wiphy_regd
= get_wiphy_regdom(wiphy
);
185 if (wiphy_regd
->dfs_region
== regd
->dfs_region
)
188 pr_debug("%s: device specific dfs_region (%s) disagrees with cfg80211's central dfs_region (%s)\n",
189 dev_name(&wiphy
->dev
),
190 reg_dfs_region_str(wiphy_regd
->dfs_region
),
191 reg_dfs_region_str(regd
->dfs_region
));
196 return regd
->dfs_region
;
199 static void rcu_free_regdom(const struct ieee80211_regdomain
*r
)
203 kfree_rcu((struct ieee80211_regdomain
*)r
, rcu_head
);
206 static struct regulatory_request
*get_last_request(void)
208 return rcu_dereference_rtnl(last_request
);
211 /* Used to queue up regulatory hints */
212 static LIST_HEAD(reg_requests_list
);
213 static DEFINE_SPINLOCK(reg_requests_lock
);
215 /* Used to queue up beacon hints for review */
216 static LIST_HEAD(reg_pending_beacons
);
217 static DEFINE_SPINLOCK(reg_pending_beacons_lock
);
219 /* Used to keep track of processed beacon hints */
220 static LIST_HEAD(reg_beacon_list
);
223 struct list_head list
;
224 struct ieee80211_channel chan
;
227 static void reg_check_chans_work(struct work_struct
*work
);
228 static DECLARE_DELAYED_WORK(reg_check_chans
, reg_check_chans_work
);
230 static void reg_todo(struct work_struct
*work
);
231 static DECLARE_WORK(reg_work
, reg_todo
);
233 /* We keep a static world regulatory domain in case of the absence of CRDA */
234 static const struct ieee80211_regdomain world_regdom
= {
238 /* IEEE 802.11b/g, channels 1..11 */
239 REG_RULE(2412-10, 2462+10, 40, 6, 20, 0),
240 /* IEEE 802.11b/g, channels 12..13. */
241 REG_RULE(2467-10, 2472+10, 20, 6, 20,
242 NL80211_RRF_NO_IR
| NL80211_RRF_AUTO_BW
),
243 /* IEEE 802.11 channel 14 - Only JP enables
244 * this and for 802.11b only */
245 REG_RULE(2484-10, 2484+10, 20, 6, 20,
247 NL80211_RRF_NO_OFDM
),
248 /* IEEE 802.11a, channel 36..48 */
249 REG_RULE(5180-10, 5240+10, 80, 6, 20,
251 NL80211_RRF_AUTO_BW
),
253 /* IEEE 802.11a, channel 52..64 - DFS required */
254 REG_RULE(5260-10, 5320+10, 80, 6, 20,
256 NL80211_RRF_AUTO_BW
|
259 /* IEEE 802.11a, channel 100..144 - DFS required */
260 REG_RULE(5500-10, 5720+10, 160, 6, 20,
264 /* IEEE 802.11a, channel 149..165 */
265 REG_RULE(5745-10, 5825+10, 80, 6, 20,
268 /* IEEE 802.11ad (60GHz), channels 1..3 */
269 REG_RULE(56160+2160*1-1080, 56160+2160*3+1080, 2160, 0, 0, 0),
273 /* protected by RTNL */
274 static const struct ieee80211_regdomain
*cfg80211_world_regdom
=
277 static char *ieee80211_regdom
= "00";
278 static char user_alpha2
[2];
279 static const struct ieee80211_regdomain
*cfg80211_user_regdom
;
281 module_param(ieee80211_regdom
, charp
, 0444);
282 MODULE_PARM_DESC(ieee80211_regdom
, "IEEE 802.11 regulatory domain code");
284 static void reg_free_request(struct regulatory_request
*request
)
286 if (request
== &core_request_world
)
289 if (request
!= get_last_request())
293 static void reg_free_last_request(void)
295 struct regulatory_request
*lr
= get_last_request();
297 if (lr
!= &core_request_world
&& lr
)
298 kfree_rcu(lr
, rcu_head
);
301 static void reg_update_last_request(struct regulatory_request
*request
)
303 struct regulatory_request
*lr
;
305 lr
= get_last_request();
309 reg_free_last_request();
310 rcu_assign_pointer(last_request
, request
);
313 static void reset_regdomains(bool full_reset
,
314 const struct ieee80211_regdomain
*new_regdom
)
316 const struct ieee80211_regdomain
*r
;
320 r
= get_cfg80211_regdom();
322 /* avoid freeing static information or freeing something twice */
323 if (r
== cfg80211_world_regdom
)
325 if (cfg80211_world_regdom
== &world_regdom
)
326 cfg80211_world_regdom
= NULL
;
327 if (r
== &world_regdom
)
331 rcu_free_regdom(cfg80211_world_regdom
);
333 cfg80211_world_regdom
= &world_regdom
;
334 rcu_assign_pointer(cfg80211_regdomain
, new_regdom
);
339 reg_update_last_request(&core_request_world
);
343 * Dynamic world regulatory domain requested by the wireless
344 * core upon initialization
346 static void update_world_regdomain(const struct ieee80211_regdomain
*rd
)
348 struct regulatory_request
*lr
;
350 lr
= get_last_request();
354 reset_regdomains(false, rd
);
356 cfg80211_world_regdom
= rd
;
359 bool is_world_regdom(const char *alpha2
)
363 return alpha2
[0] == '0' && alpha2
[1] == '0';
366 static bool is_alpha2_set(const char *alpha2
)
370 return alpha2
[0] && alpha2
[1];
373 static bool is_unknown_alpha2(const char *alpha2
)
378 * Special case where regulatory domain was built by driver
379 * but a specific alpha2 cannot be determined
381 return alpha2
[0] == '9' && alpha2
[1] == '9';
384 static bool is_intersected_alpha2(const char *alpha2
)
389 * Special case where regulatory domain is the
390 * result of an intersection between two regulatory domain
393 return alpha2
[0] == '9' && alpha2
[1] == '8';
396 static bool is_an_alpha2(const char *alpha2
)
400 return isalpha(alpha2
[0]) && isalpha(alpha2
[1]);
403 static bool alpha2_equal(const char *alpha2_x
, const char *alpha2_y
)
405 if (!alpha2_x
|| !alpha2_y
)
407 return alpha2_x
[0] == alpha2_y
[0] && alpha2_x
[1] == alpha2_y
[1];
410 static bool regdom_changes(const char *alpha2
)
412 const struct ieee80211_regdomain
*r
= get_cfg80211_regdom();
416 return !alpha2_equal(r
->alpha2
, alpha2
);
420 * The NL80211_REGDOM_SET_BY_USER regdom alpha2 is cached, this lets
421 * you know if a valid regulatory hint with NL80211_REGDOM_SET_BY_USER
422 * has ever been issued.
424 static bool is_user_regdom_saved(void)
426 if (user_alpha2
[0] == '9' && user_alpha2
[1] == '7')
429 /* This would indicate a mistake on the design */
430 if (WARN(!is_world_regdom(user_alpha2
) && !is_an_alpha2(user_alpha2
),
431 "Unexpected user alpha2: %c%c\n",
432 user_alpha2
[0], user_alpha2
[1]))
438 static const struct ieee80211_regdomain
*
439 reg_copy_regd(const struct ieee80211_regdomain
*src_regd
)
441 struct ieee80211_regdomain
*regd
;
444 regd
= kzalloc(struct_size(regd
, reg_rules
, src_regd
->n_reg_rules
),
447 return ERR_PTR(-ENOMEM
);
449 memcpy(regd
, src_regd
, sizeof(struct ieee80211_regdomain
));
451 for (i
= 0; i
< src_regd
->n_reg_rules
; i
++)
452 memcpy(®d
->reg_rules
[i
], &src_regd
->reg_rules
[i
],
453 sizeof(struct ieee80211_reg_rule
));
458 static void cfg80211_save_user_regdom(const struct ieee80211_regdomain
*rd
)
462 if (!IS_ERR(cfg80211_user_regdom
))
463 kfree(cfg80211_user_regdom
);
464 cfg80211_user_regdom
= reg_copy_regd(rd
);
467 struct reg_regdb_apply_request
{
468 struct list_head list
;
469 const struct ieee80211_regdomain
*regdom
;
472 static LIST_HEAD(reg_regdb_apply_list
);
473 static DEFINE_MUTEX(reg_regdb_apply_mutex
);
475 static void reg_regdb_apply(struct work_struct
*work
)
477 struct reg_regdb_apply_request
*request
;
481 mutex_lock(®_regdb_apply_mutex
);
482 while (!list_empty(®_regdb_apply_list
)) {
483 request
= list_first_entry(®_regdb_apply_list
,
484 struct reg_regdb_apply_request
,
486 list_del(&request
->list
);
488 set_regdom(request
->regdom
, REGD_SOURCE_INTERNAL_DB
);
491 mutex_unlock(®_regdb_apply_mutex
);
496 static DECLARE_WORK(reg_regdb_work
, reg_regdb_apply
);
498 static int reg_schedule_apply(const struct ieee80211_regdomain
*regdom
)
500 struct reg_regdb_apply_request
*request
;
502 request
= kzalloc(sizeof(struct reg_regdb_apply_request
), GFP_KERNEL
);
508 request
->regdom
= regdom
;
510 mutex_lock(®_regdb_apply_mutex
);
511 list_add_tail(&request
->list
, ®_regdb_apply_list
);
512 mutex_unlock(®_regdb_apply_mutex
);
514 schedule_work(®_regdb_work
);
518 #ifdef CONFIG_CFG80211_CRDA_SUPPORT
519 /* Max number of consecutive attempts to communicate with CRDA */
520 #define REG_MAX_CRDA_TIMEOUTS 10
522 static u32 reg_crda_timeouts
;
524 static void crda_timeout_work(struct work_struct
*work
);
525 static DECLARE_DELAYED_WORK(crda_timeout
, crda_timeout_work
);
527 static void crda_timeout_work(struct work_struct
*work
)
529 pr_debug("Timeout while waiting for CRDA to reply, restoring regulatory settings\n");
532 restore_regulatory_settings(true, false);
536 static void cancel_crda_timeout(void)
538 cancel_delayed_work(&crda_timeout
);
541 static void cancel_crda_timeout_sync(void)
543 cancel_delayed_work_sync(&crda_timeout
);
546 static void reset_crda_timeouts(void)
548 reg_crda_timeouts
= 0;
552 * This lets us keep regulatory code which is updated on a regulatory
553 * basis in userspace.
555 static int call_crda(const char *alpha2
)
558 char *env
[] = { country
, NULL
};
561 snprintf(country
, sizeof(country
), "COUNTRY=%c%c",
562 alpha2
[0], alpha2
[1]);
564 if (reg_crda_timeouts
> REG_MAX_CRDA_TIMEOUTS
) {
565 pr_debug("Exceeded CRDA call max attempts. Not calling CRDA\n");
569 if (!is_world_regdom((char *) alpha2
))
570 pr_debug("Calling CRDA for country: %c%c\n",
571 alpha2
[0], alpha2
[1]);
573 pr_debug("Calling CRDA to update world regulatory domain\n");
575 ret
= kobject_uevent_env(®_pdev
->dev
.kobj
, KOBJ_CHANGE
, env
);
579 queue_delayed_work(system_power_efficient_wq
,
580 &crda_timeout
, msecs_to_jiffies(3142));
584 static inline void cancel_crda_timeout(void) {}
585 static inline void cancel_crda_timeout_sync(void) {}
586 static inline void reset_crda_timeouts(void) {}
587 static inline int call_crda(const char *alpha2
)
591 #endif /* CONFIG_CFG80211_CRDA_SUPPORT */
593 /* code to directly load a firmware database through request_firmware */
594 static const struct fwdb_header
*regdb
;
596 struct fwdb_country
{
599 /* this struct cannot be extended */
600 } __packed
__aligned(4);
602 struct fwdb_collection
{
606 /* no optional data yet */
607 /* aligned to 2, then followed by __be16 array of rule pointers */
608 } __packed
__aligned(4);
611 FWDB_FLAG_NO_OFDM
= BIT(0),
612 FWDB_FLAG_NO_OUTDOOR
= BIT(1),
613 FWDB_FLAG_DFS
= BIT(2),
614 FWDB_FLAG_NO_IR
= BIT(3),
615 FWDB_FLAG_AUTO_BW
= BIT(4),
624 struct fwdb_wmm_rule
{
625 struct fwdb_wmm_ac client
[IEEE80211_NUM_ACS
];
626 struct fwdb_wmm_ac ap
[IEEE80211_NUM_ACS
];
633 __be32 start
, end
, max_bw
;
634 /* start of optional data */
637 } __packed
__aligned(4);
639 #define FWDB_MAGIC 0x52474442
640 #define FWDB_VERSION 20
645 struct fwdb_country country
[];
646 } __packed
__aligned(4);
648 static int ecw2cw(int ecw
)
650 return (1 << ecw
) - 1;
653 static bool valid_wmm(struct fwdb_wmm_rule
*rule
)
655 struct fwdb_wmm_ac
*ac
= (struct fwdb_wmm_ac
*)rule
;
658 for (i
= 0; i
< IEEE80211_NUM_ACS
* 2; i
++) {
659 u16 cw_min
= ecw2cw((ac
[i
].ecw
& 0xf0) >> 4);
660 u16 cw_max
= ecw2cw(ac
[i
].ecw
& 0x0f);
661 u8 aifsn
= ac
[i
].aifsn
;
663 if (cw_min
>= cw_max
)
673 static bool valid_rule(const u8
*data
, unsigned int size
, u16 rule_ptr
)
675 struct fwdb_rule
*rule
= (void *)(data
+ (rule_ptr
<< 2));
677 if ((u8
*)rule
+ sizeof(rule
->len
) > data
+ size
)
680 /* mandatory fields */
681 if (rule
->len
< offsetofend(struct fwdb_rule
, max_bw
))
683 if (rule
->len
>= offsetofend(struct fwdb_rule
, wmm_ptr
)) {
684 u32 wmm_ptr
= be16_to_cpu(rule
->wmm_ptr
) << 2;
685 struct fwdb_wmm_rule
*wmm
;
687 if (wmm_ptr
+ sizeof(struct fwdb_wmm_rule
) > size
)
690 wmm
= (void *)(data
+ wmm_ptr
);
698 static bool valid_country(const u8
*data
, unsigned int size
,
699 const struct fwdb_country
*country
)
701 unsigned int ptr
= be16_to_cpu(country
->coll_ptr
) << 2;
702 struct fwdb_collection
*coll
= (void *)(data
+ ptr
);
706 /* make sure we can read len/n_rules */
707 if ((u8
*)coll
+ offsetofend(typeof(*coll
), n_rules
) > data
+ size
)
710 /* make sure base struct and all rules fit */
711 if ((u8
*)coll
+ ALIGN(coll
->len
, 2) +
712 (coll
->n_rules
* 2) > data
+ size
)
715 /* mandatory fields must exist */
716 if (coll
->len
< offsetofend(struct fwdb_collection
, dfs_region
))
719 rules_ptr
= (void *)((u8
*)coll
+ ALIGN(coll
->len
, 2));
721 for (i
= 0; i
< coll
->n_rules
; i
++) {
722 u16 rule_ptr
= be16_to_cpu(rules_ptr
[i
]);
724 if (!valid_rule(data
, size
, rule_ptr
))
731 #ifdef CONFIG_CFG80211_REQUIRE_SIGNED_REGDB
732 static struct key
*builtin_regdb_keys
;
734 static void __init
load_keys_from_buffer(const u8
*p
, unsigned int buflen
)
736 const u8
*end
= p
+ buflen
;
741 /* Each cert begins with an ASN.1 SEQUENCE tag and must be more
742 * than 256 bytes in size.
749 plen
= (p
[2] << 8) | p
[3];
754 key
= key_create_or_update(make_key_ref(builtin_regdb_keys
, 1),
755 "asymmetric", NULL
, p
, plen
,
756 ((KEY_POS_ALL
& ~KEY_POS_SETATTR
) |
757 KEY_USR_VIEW
| KEY_USR_READ
),
758 KEY_ALLOC_NOT_IN_QUOTA
|
760 KEY_ALLOC_BYPASS_RESTRICTION
);
762 pr_err("Problem loading in-kernel X.509 certificate (%ld)\n",
765 pr_notice("Loaded X.509 cert '%s'\n",
766 key_ref_to_ptr(key
)->description
);
775 pr_err("Problem parsing in-kernel X.509 certificate list\n");
778 static int __init
load_builtin_regdb_keys(void)
781 keyring_alloc(".builtin_regdb_keys",
782 KUIDT_INIT(0), KGIDT_INIT(0), current_cred(),
783 ((KEY_POS_ALL
& ~KEY_POS_SETATTR
) |
784 KEY_USR_VIEW
| KEY_USR_READ
| KEY_USR_SEARCH
),
785 KEY_ALLOC_NOT_IN_QUOTA
, NULL
, NULL
);
786 if (IS_ERR(builtin_regdb_keys
))
787 return PTR_ERR(builtin_regdb_keys
);
789 pr_notice("Loading compiled-in X.509 certificates for regulatory database\n");
791 #ifdef CONFIG_CFG80211_USE_KERNEL_REGDB_KEYS
792 load_keys_from_buffer(shipped_regdb_certs
, shipped_regdb_certs_len
);
794 #ifdef CONFIG_CFG80211_EXTRA_REGDB_KEYDIR
795 if (CONFIG_CFG80211_EXTRA_REGDB_KEYDIR
[0] != '\0')
796 load_keys_from_buffer(extra_regdb_certs
, extra_regdb_certs_len
);
802 static bool regdb_has_valid_signature(const u8
*data
, unsigned int size
)
804 const struct firmware
*sig
;
807 if (request_firmware(&sig
, "regulatory.db.p7s", ®_pdev
->dev
))
810 result
= verify_pkcs7_signature(data
, size
, sig
->data
, sig
->size
,
812 VERIFYING_UNSPECIFIED_SIGNATURE
,
815 release_firmware(sig
);
820 static void free_regdb_keyring(void)
822 key_put(builtin_regdb_keys
);
825 static int load_builtin_regdb_keys(void)
830 static bool regdb_has_valid_signature(const u8
*data
, unsigned int size
)
835 static void free_regdb_keyring(void)
838 #endif /* CONFIG_CFG80211_REQUIRE_SIGNED_REGDB */
840 static bool valid_regdb(const u8
*data
, unsigned int size
)
842 const struct fwdb_header
*hdr
= (void *)data
;
843 const struct fwdb_country
*country
;
845 if (size
< sizeof(*hdr
))
848 if (hdr
->magic
!= cpu_to_be32(FWDB_MAGIC
))
851 if (hdr
->version
!= cpu_to_be32(FWDB_VERSION
))
854 if (!regdb_has_valid_signature(data
, size
))
857 country
= &hdr
->country
[0];
858 while ((u8
*)(country
+ 1) <= data
+ size
) {
859 if (!country
->coll_ptr
)
861 if (!valid_country(data
, size
, country
))
869 static void set_wmm_rule(const struct fwdb_header
*db
,
870 const struct fwdb_country
*country
,
871 const struct fwdb_rule
*rule
,
872 struct ieee80211_reg_rule
*rrule
)
874 struct ieee80211_wmm_rule
*wmm_rule
= &rrule
->wmm_rule
;
875 struct fwdb_wmm_rule
*wmm
;
876 unsigned int i
, wmm_ptr
;
878 wmm_ptr
= be16_to_cpu(rule
->wmm_ptr
) << 2;
879 wmm
= (void *)((u8
*)db
+ wmm_ptr
);
881 if (!valid_wmm(wmm
)) {
882 pr_err("Invalid regulatory WMM rule %u-%u in domain %c%c\n",
883 be32_to_cpu(rule
->start
), be32_to_cpu(rule
->end
),
884 country
->alpha2
[0], country
->alpha2
[1]);
888 for (i
= 0; i
< IEEE80211_NUM_ACS
; i
++) {
889 wmm_rule
->client
[i
].cw_min
=
890 ecw2cw((wmm
->client
[i
].ecw
& 0xf0) >> 4);
891 wmm_rule
->client
[i
].cw_max
= ecw2cw(wmm
->client
[i
].ecw
& 0x0f);
892 wmm_rule
->client
[i
].aifsn
= wmm
->client
[i
].aifsn
;
893 wmm_rule
->client
[i
].cot
=
894 1000 * be16_to_cpu(wmm
->client
[i
].cot
);
895 wmm_rule
->ap
[i
].cw_min
= ecw2cw((wmm
->ap
[i
].ecw
& 0xf0) >> 4);
896 wmm_rule
->ap
[i
].cw_max
= ecw2cw(wmm
->ap
[i
].ecw
& 0x0f);
897 wmm_rule
->ap
[i
].aifsn
= wmm
->ap
[i
].aifsn
;
898 wmm_rule
->ap
[i
].cot
= 1000 * be16_to_cpu(wmm
->ap
[i
].cot
);
901 rrule
->has_wmm
= true;
904 static int __regdb_query_wmm(const struct fwdb_header
*db
,
905 const struct fwdb_country
*country
, int freq
,
906 struct ieee80211_reg_rule
*rrule
)
908 unsigned int ptr
= be16_to_cpu(country
->coll_ptr
) << 2;
909 struct fwdb_collection
*coll
= (void *)((u8
*)db
+ ptr
);
912 for (i
= 0; i
< coll
->n_rules
; i
++) {
913 __be16
*rules_ptr
= (void *)((u8
*)coll
+ ALIGN(coll
->len
, 2));
914 unsigned int rule_ptr
= be16_to_cpu(rules_ptr
[i
]) << 2;
915 struct fwdb_rule
*rule
= (void *)((u8
*)db
+ rule_ptr
);
917 if (rule
->len
< offsetofend(struct fwdb_rule
, wmm_ptr
))
920 if (freq
>= KHZ_TO_MHZ(be32_to_cpu(rule
->start
)) &&
921 freq
<= KHZ_TO_MHZ(be32_to_cpu(rule
->end
))) {
922 set_wmm_rule(db
, country
, rule
, rrule
);
930 int reg_query_regdb_wmm(char *alpha2
, int freq
, struct ieee80211_reg_rule
*rule
)
932 const struct fwdb_header
*hdr
= regdb
;
933 const struct fwdb_country
*country
;
939 return PTR_ERR(regdb
);
941 country
= &hdr
->country
[0];
942 while (country
->coll_ptr
) {
943 if (alpha2_equal(alpha2
, country
->alpha2
))
944 return __regdb_query_wmm(regdb
, country
, freq
, rule
);
951 EXPORT_SYMBOL(reg_query_regdb_wmm
);
953 static int regdb_query_country(const struct fwdb_header
*db
,
954 const struct fwdb_country
*country
)
956 unsigned int ptr
= be16_to_cpu(country
->coll_ptr
) << 2;
957 struct fwdb_collection
*coll
= (void *)((u8
*)db
+ ptr
);
958 struct ieee80211_regdomain
*regdom
;
961 regdom
= kzalloc(struct_size(regdom
, reg_rules
, coll
->n_rules
),
966 regdom
->n_reg_rules
= coll
->n_rules
;
967 regdom
->alpha2
[0] = country
->alpha2
[0];
968 regdom
->alpha2
[1] = country
->alpha2
[1];
969 regdom
->dfs_region
= coll
->dfs_region
;
971 for (i
= 0; i
< regdom
->n_reg_rules
; i
++) {
972 __be16
*rules_ptr
= (void *)((u8
*)coll
+ ALIGN(coll
->len
, 2));
973 unsigned int rule_ptr
= be16_to_cpu(rules_ptr
[i
]) << 2;
974 struct fwdb_rule
*rule
= (void *)((u8
*)db
+ rule_ptr
);
975 struct ieee80211_reg_rule
*rrule
= ®dom
->reg_rules
[i
];
977 rrule
->freq_range
.start_freq_khz
= be32_to_cpu(rule
->start
);
978 rrule
->freq_range
.end_freq_khz
= be32_to_cpu(rule
->end
);
979 rrule
->freq_range
.max_bandwidth_khz
= be32_to_cpu(rule
->max_bw
);
981 rrule
->power_rule
.max_antenna_gain
= 0;
982 rrule
->power_rule
.max_eirp
= be16_to_cpu(rule
->max_eirp
);
985 if (rule
->flags
& FWDB_FLAG_NO_OFDM
)
986 rrule
->flags
|= NL80211_RRF_NO_OFDM
;
987 if (rule
->flags
& FWDB_FLAG_NO_OUTDOOR
)
988 rrule
->flags
|= NL80211_RRF_NO_OUTDOOR
;
989 if (rule
->flags
& FWDB_FLAG_DFS
)
990 rrule
->flags
|= NL80211_RRF_DFS
;
991 if (rule
->flags
& FWDB_FLAG_NO_IR
)
992 rrule
->flags
|= NL80211_RRF_NO_IR
;
993 if (rule
->flags
& FWDB_FLAG_AUTO_BW
)
994 rrule
->flags
|= NL80211_RRF_AUTO_BW
;
996 rrule
->dfs_cac_ms
= 0;
998 /* handle optional data */
999 if (rule
->len
>= offsetofend(struct fwdb_rule
, cac_timeout
))
1001 1000 * be16_to_cpu(rule
->cac_timeout
);
1002 if (rule
->len
>= offsetofend(struct fwdb_rule
, wmm_ptr
))
1003 set_wmm_rule(db
, country
, rule
, rrule
);
1006 return reg_schedule_apply(regdom
);
1009 static int query_regdb(const char *alpha2
)
1011 const struct fwdb_header
*hdr
= regdb
;
1012 const struct fwdb_country
*country
;
1017 return PTR_ERR(regdb
);
1019 country
= &hdr
->country
[0];
1020 while (country
->coll_ptr
) {
1021 if (alpha2_equal(alpha2
, country
->alpha2
))
1022 return regdb_query_country(regdb
, country
);
1029 static void regdb_fw_cb(const struct firmware
*fw
, void *context
)
1032 bool restore
= true;
1036 pr_info("failed to load regulatory.db\n");
1037 set_error
= -ENODATA
;
1038 } else if (!valid_regdb(fw
->data
, fw
->size
)) {
1039 pr_info("loaded regulatory.db is malformed or signature is missing/invalid\n");
1040 set_error
= -EINVAL
;
1044 if (regdb
&& !IS_ERR(regdb
)) {
1045 /* negative case - a bug
1046 * positive case - can happen due to race in case of multiple cb's in
1047 * queue, due to usage of asynchronous callback
1049 * Either case, just restore and free new db.
1051 } else if (set_error
) {
1052 regdb
= ERR_PTR(set_error
);
1054 db
= kmemdup(fw
->data
, fw
->size
, GFP_KERNEL
);
1057 restore
= context
&& query_regdb(context
);
1064 restore_regulatory_settings(true, false);
1070 release_firmware(fw
);
1073 static int query_regdb_file(const char *alpha2
)
1078 return query_regdb(alpha2
);
1080 alpha2
= kmemdup(alpha2
, 2, GFP_KERNEL
);
1084 return request_firmware_nowait(THIS_MODULE
, true, "regulatory.db",
1085 ®_pdev
->dev
, GFP_KERNEL
,
1086 (void *)alpha2
, regdb_fw_cb
);
1089 int reg_reload_regdb(void)
1091 const struct firmware
*fw
;
1095 err
= request_firmware(&fw
, "regulatory.db", ®_pdev
->dev
);
1099 if (!valid_regdb(fw
->data
, fw
->size
)) {
1104 db
= kmemdup(fw
->data
, fw
->size
, GFP_KERNEL
);
1111 if (!IS_ERR_OR_NULL(regdb
))
1117 release_firmware(fw
);
1121 static bool reg_query_database(struct regulatory_request
*request
)
1123 if (query_regdb_file(request
->alpha2
) == 0)
1126 if (call_crda(request
->alpha2
) == 0)
1132 bool reg_is_valid_request(const char *alpha2
)
1134 struct regulatory_request
*lr
= get_last_request();
1136 if (!lr
|| lr
->processed
)
1139 return alpha2_equal(lr
->alpha2
, alpha2
);
1142 static const struct ieee80211_regdomain
*reg_get_regdomain(struct wiphy
*wiphy
)
1144 struct regulatory_request
*lr
= get_last_request();
1147 * Follow the driver's regulatory domain, if present, unless a country
1148 * IE has been processed or a user wants to help complaince further
1150 if (lr
->initiator
!= NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
1151 lr
->initiator
!= NL80211_REGDOM_SET_BY_USER
&&
1153 return get_wiphy_regdom(wiphy
);
1155 return get_cfg80211_regdom();
1159 reg_get_max_bandwidth_from_range(const struct ieee80211_regdomain
*rd
,
1160 const struct ieee80211_reg_rule
*rule
)
1162 const struct ieee80211_freq_range
*freq_range
= &rule
->freq_range
;
1163 const struct ieee80211_freq_range
*freq_range_tmp
;
1164 const struct ieee80211_reg_rule
*tmp
;
1165 u32 start_freq
, end_freq
, idx
, no
;
1167 for (idx
= 0; idx
< rd
->n_reg_rules
; idx
++)
1168 if (rule
== &rd
->reg_rules
[idx
])
1171 if (idx
== rd
->n_reg_rules
)
1174 /* get start_freq */
1178 tmp
= &rd
->reg_rules
[--no
];
1179 freq_range_tmp
= &tmp
->freq_range
;
1181 if (freq_range_tmp
->end_freq_khz
< freq_range
->start_freq_khz
)
1184 freq_range
= freq_range_tmp
;
1187 start_freq
= freq_range
->start_freq_khz
;
1190 freq_range
= &rule
->freq_range
;
1193 while (no
< rd
->n_reg_rules
- 1) {
1194 tmp
= &rd
->reg_rules
[++no
];
1195 freq_range_tmp
= &tmp
->freq_range
;
1197 if (freq_range_tmp
->start_freq_khz
> freq_range
->end_freq_khz
)
1200 freq_range
= freq_range_tmp
;
1203 end_freq
= freq_range
->end_freq_khz
;
1205 return end_freq
- start_freq
;
1208 unsigned int reg_get_max_bandwidth(const struct ieee80211_regdomain
*rd
,
1209 const struct ieee80211_reg_rule
*rule
)
1211 unsigned int bw
= reg_get_max_bandwidth_from_range(rd
, rule
);
1213 if (rule
->flags
& NL80211_RRF_NO_160MHZ
)
1214 bw
= min_t(unsigned int, bw
, MHZ_TO_KHZ(80));
1215 if (rule
->flags
& NL80211_RRF_NO_80MHZ
)
1216 bw
= min_t(unsigned int, bw
, MHZ_TO_KHZ(40));
1219 * HT40+/HT40- limits are handled per-channel. Only limit BW if both
1222 if (rule
->flags
& NL80211_RRF_NO_HT40MINUS
&&
1223 rule
->flags
& NL80211_RRF_NO_HT40PLUS
)
1224 bw
= min_t(unsigned int, bw
, MHZ_TO_KHZ(20));
1229 /* Sanity check on a regulatory rule */
1230 static bool is_valid_reg_rule(const struct ieee80211_reg_rule
*rule
)
1232 const struct ieee80211_freq_range
*freq_range
= &rule
->freq_range
;
1235 if (freq_range
->start_freq_khz
<= 0 || freq_range
->end_freq_khz
<= 0)
1238 if (freq_range
->start_freq_khz
> freq_range
->end_freq_khz
)
1241 freq_diff
= freq_range
->end_freq_khz
- freq_range
->start_freq_khz
;
1243 if (freq_range
->end_freq_khz
<= freq_range
->start_freq_khz
||
1244 freq_range
->max_bandwidth_khz
> freq_diff
)
1250 static bool is_valid_rd(const struct ieee80211_regdomain
*rd
)
1252 const struct ieee80211_reg_rule
*reg_rule
= NULL
;
1255 if (!rd
->n_reg_rules
)
1258 if (WARN_ON(rd
->n_reg_rules
> NL80211_MAX_SUPP_REG_RULES
))
1261 for (i
= 0; i
< rd
->n_reg_rules
; i
++) {
1262 reg_rule
= &rd
->reg_rules
[i
];
1263 if (!is_valid_reg_rule(reg_rule
))
1271 * freq_in_rule_band - tells us if a frequency is in a frequency band
1272 * @freq_range: frequency rule we want to query
1273 * @freq_khz: frequency we are inquiring about
1275 * This lets us know if a specific frequency rule is or is not relevant to
1276 * a specific frequency's band. Bands are device specific and artificial
1277 * definitions (the "2.4 GHz band", the "5 GHz band" and the "60GHz band"),
1278 * however it is safe for now to assume that a frequency rule should not be
1279 * part of a frequency's band if the start freq or end freq are off by more
1280 * than 2 GHz for the 2.4 and 5 GHz bands, and by more than 20 GHz for the
1282 * This resolution can be lowered and should be considered as we add
1283 * regulatory rule support for other "bands".
1285 static bool freq_in_rule_band(const struct ieee80211_freq_range
*freq_range
,
1288 #define ONE_GHZ_IN_KHZ 1000000
1290 * From 802.11ad: directional multi-gigabit (DMG):
1291 * Pertaining to operation in a frequency band containing a channel
1292 * with the Channel starting frequency above 45 GHz.
1294 u32 limit
= freq_khz
> 45 * ONE_GHZ_IN_KHZ
?
1295 20 * ONE_GHZ_IN_KHZ
: 2 * ONE_GHZ_IN_KHZ
;
1296 if (abs(freq_khz
- freq_range
->start_freq_khz
) <= limit
)
1298 if (abs(freq_khz
- freq_range
->end_freq_khz
) <= limit
)
1301 #undef ONE_GHZ_IN_KHZ
1305 * Later on we can perhaps use the more restrictive DFS
1306 * region but we don't have information for that yet so
1307 * for now simply disallow conflicts.
1309 static enum nl80211_dfs_regions
1310 reg_intersect_dfs_region(const enum nl80211_dfs_regions dfs_region1
,
1311 const enum nl80211_dfs_regions dfs_region2
)
1313 if (dfs_region1
!= dfs_region2
)
1314 return NL80211_DFS_UNSET
;
1318 static void reg_wmm_rules_intersect(const struct ieee80211_wmm_ac
*wmm_ac1
,
1319 const struct ieee80211_wmm_ac
*wmm_ac2
,
1320 struct ieee80211_wmm_ac
*intersect
)
1322 intersect
->cw_min
= max_t(u16
, wmm_ac1
->cw_min
, wmm_ac2
->cw_min
);
1323 intersect
->cw_max
= max_t(u16
, wmm_ac1
->cw_max
, wmm_ac2
->cw_max
);
1324 intersect
->cot
= min_t(u16
, wmm_ac1
->cot
, wmm_ac2
->cot
);
1325 intersect
->aifsn
= max_t(u8
, wmm_ac1
->aifsn
, wmm_ac2
->aifsn
);
1329 * Helper for regdom_intersect(), this does the real
1330 * mathematical intersection fun
1332 static int reg_rules_intersect(const struct ieee80211_regdomain
*rd1
,
1333 const struct ieee80211_regdomain
*rd2
,
1334 const struct ieee80211_reg_rule
*rule1
,
1335 const struct ieee80211_reg_rule
*rule2
,
1336 struct ieee80211_reg_rule
*intersected_rule
)
1338 const struct ieee80211_freq_range
*freq_range1
, *freq_range2
;
1339 struct ieee80211_freq_range
*freq_range
;
1340 const struct ieee80211_power_rule
*power_rule1
, *power_rule2
;
1341 struct ieee80211_power_rule
*power_rule
;
1342 const struct ieee80211_wmm_rule
*wmm_rule1
, *wmm_rule2
;
1343 struct ieee80211_wmm_rule
*wmm_rule
;
1344 u32 freq_diff
, max_bandwidth1
, max_bandwidth2
;
1346 freq_range1
= &rule1
->freq_range
;
1347 freq_range2
= &rule2
->freq_range
;
1348 freq_range
= &intersected_rule
->freq_range
;
1350 power_rule1
= &rule1
->power_rule
;
1351 power_rule2
= &rule2
->power_rule
;
1352 power_rule
= &intersected_rule
->power_rule
;
1354 wmm_rule1
= &rule1
->wmm_rule
;
1355 wmm_rule2
= &rule2
->wmm_rule
;
1356 wmm_rule
= &intersected_rule
->wmm_rule
;
1358 freq_range
->start_freq_khz
= max(freq_range1
->start_freq_khz
,
1359 freq_range2
->start_freq_khz
);
1360 freq_range
->end_freq_khz
= min(freq_range1
->end_freq_khz
,
1361 freq_range2
->end_freq_khz
);
1363 max_bandwidth1
= freq_range1
->max_bandwidth_khz
;
1364 max_bandwidth2
= freq_range2
->max_bandwidth_khz
;
1366 if (rule1
->flags
& NL80211_RRF_AUTO_BW
)
1367 max_bandwidth1
= reg_get_max_bandwidth(rd1
, rule1
);
1368 if (rule2
->flags
& NL80211_RRF_AUTO_BW
)
1369 max_bandwidth2
= reg_get_max_bandwidth(rd2
, rule2
);
1371 freq_range
->max_bandwidth_khz
= min(max_bandwidth1
, max_bandwidth2
);
1373 intersected_rule
->flags
= rule1
->flags
| rule2
->flags
;
1376 * In case NL80211_RRF_AUTO_BW requested for both rules
1377 * set AUTO_BW in intersected rule also. Next we will
1378 * calculate BW correctly in handle_channel function.
1379 * In other case remove AUTO_BW flag while we calculate
1380 * maximum bandwidth correctly and auto calculation is
1383 if ((rule1
->flags
& NL80211_RRF_AUTO_BW
) &&
1384 (rule2
->flags
& NL80211_RRF_AUTO_BW
))
1385 intersected_rule
->flags
|= NL80211_RRF_AUTO_BW
;
1387 intersected_rule
->flags
&= ~NL80211_RRF_AUTO_BW
;
1389 freq_diff
= freq_range
->end_freq_khz
- freq_range
->start_freq_khz
;
1390 if (freq_range
->max_bandwidth_khz
> freq_diff
)
1391 freq_range
->max_bandwidth_khz
= freq_diff
;
1393 power_rule
->max_eirp
= min(power_rule1
->max_eirp
,
1394 power_rule2
->max_eirp
);
1395 power_rule
->max_antenna_gain
= min(power_rule1
->max_antenna_gain
,
1396 power_rule2
->max_antenna_gain
);
1398 intersected_rule
->dfs_cac_ms
= max(rule1
->dfs_cac_ms
,
1401 if (rule1
->has_wmm
&& rule2
->has_wmm
) {
1404 for (ac
= 0; ac
< IEEE80211_NUM_ACS
; ac
++) {
1405 reg_wmm_rules_intersect(&wmm_rule1
->client
[ac
],
1406 &wmm_rule2
->client
[ac
],
1407 &wmm_rule
->client
[ac
]);
1408 reg_wmm_rules_intersect(&wmm_rule1
->ap
[ac
],
1413 intersected_rule
->has_wmm
= true;
1414 } else if (rule1
->has_wmm
) {
1415 *wmm_rule
= *wmm_rule1
;
1416 intersected_rule
->has_wmm
= true;
1417 } else if (rule2
->has_wmm
) {
1418 *wmm_rule
= *wmm_rule2
;
1419 intersected_rule
->has_wmm
= true;
1421 intersected_rule
->has_wmm
= false;
1424 if (!is_valid_reg_rule(intersected_rule
))
1430 /* check whether old rule contains new rule */
1431 static bool rule_contains(struct ieee80211_reg_rule
*r1
,
1432 struct ieee80211_reg_rule
*r2
)
1434 /* for simplicity, currently consider only same flags */
1435 if (r1
->flags
!= r2
->flags
)
1438 /* verify r1 is more restrictive */
1439 if ((r1
->power_rule
.max_antenna_gain
>
1440 r2
->power_rule
.max_antenna_gain
) ||
1441 r1
->power_rule
.max_eirp
> r2
->power_rule
.max_eirp
)
1444 /* make sure r2's range is contained within r1 */
1445 if (r1
->freq_range
.start_freq_khz
> r2
->freq_range
.start_freq_khz
||
1446 r1
->freq_range
.end_freq_khz
< r2
->freq_range
.end_freq_khz
)
1449 /* and finally verify that r1.max_bw >= r2.max_bw */
1450 if (r1
->freq_range
.max_bandwidth_khz
<
1451 r2
->freq_range
.max_bandwidth_khz
)
1457 /* add or extend current rules. do nothing if rule is already contained */
1458 static void add_rule(struct ieee80211_reg_rule
*rule
,
1459 struct ieee80211_reg_rule
*reg_rules
, u32
*n_rules
)
1461 struct ieee80211_reg_rule
*tmp_rule
;
1464 for (i
= 0; i
< *n_rules
; i
++) {
1465 tmp_rule
= ®_rules
[i
];
1466 /* rule is already contained - do nothing */
1467 if (rule_contains(tmp_rule
, rule
))
1470 /* extend rule if possible */
1471 if (rule_contains(rule
, tmp_rule
)) {
1472 memcpy(tmp_rule
, rule
, sizeof(*rule
));
1477 memcpy(®_rules
[*n_rules
], rule
, sizeof(*rule
));
1482 * regdom_intersect - do the intersection between two regulatory domains
1483 * @rd1: first regulatory domain
1484 * @rd2: second regulatory domain
1486 * Use this function to get the intersection between two regulatory domains.
1487 * Once completed we will mark the alpha2 for the rd as intersected, "98",
1488 * as no one single alpha2 can represent this regulatory domain.
1490 * Returns a pointer to the regulatory domain structure which will hold the
1491 * resulting intersection of rules between rd1 and rd2. We will
1492 * kzalloc() this structure for you.
1494 static struct ieee80211_regdomain
*
1495 regdom_intersect(const struct ieee80211_regdomain
*rd1
,
1496 const struct ieee80211_regdomain
*rd2
)
1500 unsigned int num_rules
= 0;
1501 const struct ieee80211_reg_rule
*rule1
, *rule2
;
1502 struct ieee80211_reg_rule intersected_rule
;
1503 struct ieee80211_regdomain
*rd
;
1509 * First we get a count of the rules we'll need, then we actually
1510 * build them. This is to so we can malloc() and free() a
1511 * regdomain once. The reason we use reg_rules_intersect() here
1512 * is it will return -EINVAL if the rule computed makes no sense.
1513 * All rules that do check out OK are valid.
1516 for (x
= 0; x
< rd1
->n_reg_rules
; x
++) {
1517 rule1
= &rd1
->reg_rules
[x
];
1518 for (y
= 0; y
< rd2
->n_reg_rules
; y
++) {
1519 rule2
= &rd2
->reg_rules
[y
];
1520 if (!reg_rules_intersect(rd1
, rd2
, rule1
, rule2
,
1529 rd
= kzalloc(struct_size(rd
, reg_rules
, num_rules
), GFP_KERNEL
);
1533 for (x
= 0; x
< rd1
->n_reg_rules
; x
++) {
1534 rule1
= &rd1
->reg_rules
[x
];
1535 for (y
= 0; y
< rd2
->n_reg_rules
; y
++) {
1536 rule2
= &rd2
->reg_rules
[y
];
1537 r
= reg_rules_intersect(rd1
, rd2
, rule1
, rule2
,
1540 * No need to memset here the intersected rule here as
1541 * we're not using the stack anymore
1546 add_rule(&intersected_rule
, rd
->reg_rules
,
1551 rd
->alpha2
[0] = '9';
1552 rd
->alpha2
[1] = '8';
1553 rd
->dfs_region
= reg_intersect_dfs_region(rd1
->dfs_region
,
1560 * XXX: add support for the rest of enum nl80211_reg_rule_flags, we may
1561 * want to just have the channel structure use these
1563 static u32
map_regdom_flags(u32 rd_flags
)
1565 u32 channel_flags
= 0;
1566 if (rd_flags
& NL80211_RRF_NO_IR_ALL
)
1567 channel_flags
|= IEEE80211_CHAN_NO_IR
;
1568 if (rd_flags
& NL80211_RRF_DFS
)
1569 channel_flags
|= IEEE80211_CHAN_RADAR
;
1570 if (rd_flags
& NL80211_RRF_NO_OFDM
)
1571 channel_flags
|= IEEE80211_CHAN_NO_OFDM
;
1572 if (rd_flags
& NL80211_RRF_NO_OUTDOOR
)
1573 channel_flags
|= IEEE80211_CHAN_INDOOR_ONLY
;
1574 if (rd_flags
& NL80211_RRF_IR_CONCURRENT
)
1575 channel_flags
|= IEEE80211_CHAN_IR_CONCURRENT
;
1576 if (rd_flags
& NL80211_RRF_NO_HT40MINUS
)
1577 channel_flags
|= IEEE80211_CHAN_NO_HT40MINUS
;
1578 if (rd_flags
& NL80211_RRF_NO_HT40PLUS
)
1579 channel_flags
|= IEEE80211_CHAN_NO_HT40PLUS
;
1580 if (rd_flags
& NL80211_RRF_NO_80MHZ
)
1581 channel_flags
|= IEEE80211_CHAN_NO_80MHZ
;
1582 if (rd_flags
& NL80211_RRF_NO_160MHZ
)
1583 channel_flags
|= IEEE80211_CHAN_NO_160MHZ
;
1584 if (rd_flags
& NL80211_RRF_NO_HE
)
1585 channel_flags
|= IEEE80211_CHAN_NO_HE
;
1586 return channel_flags
;
1589 static const struct ieee80211_reg_rule
*
1590 freq_reg_info_regd(u32 center_freq
,
1591 const struct ieee80211_regdomain
*regd
, u32 bw
)
1594 bool band_rule_found
= false;
1595 bool bw_fits
= false;
1598 return ERR_PTR(-EINVAL
);
1600 for (i
= 0; i
< regd
->n_reg_rules
; i
++) {
1601 const struct ieee80211_reg_rule
*rr
;
1602 const struct ieee80211_freq_range
*fr
= NULL
;
1604 rr
= ®d
->reg_rules
[i
];
1605 fr
= &rr
->freq_range
;
1608 * We only need to know if one frequency rule was
1609 * in center_freq's band, that's enough, so let's
1610 * not overwrite it once found
1612 if (!band_rule_found
)
1613 band_rule_found
= freq_in_rule_band(fr
, center_freq
);
1615 bw_fits
= cfg80211_does_bw_fit_range(fr
, center_freq
, bw
);
1617 if (band_rule_found
&& bw_fits
)
1621 if (!band_rule_found
)
1622 return ERR_PTR(-ERANGE
);
1624 return ERR_PTR(-EINVAL
);
1627 static const struct ieee80211_reg_rule
*
1628 __freq_reg_info(struct wiphy
*wiphy
, u32 center_freq
, u32 min_bw
)
1630 const struct ieee80211_regdomain
*regd
= reg_get_regdomain(wiphy
);
1631 static const u32 bws
[] = {0, 1, 2, 4, 5, 8, 10, 16, 20};
1632 const struct ieee80211_reg_rule
*reg_rule
= ERR_PTR(-ERANGE
);
1633 int i
= ARRAY_SIZE(bws
) - 1;
1636 for (bw
= MHZ_TO_KHZ(bws
[i
]); bw
>= min_bw
; bw
= MHZ_TO_KHZ(bws
[i
--])) {
1637 reg_rule
= freq_reg_info_regd(center_freq
, regd
, bw
);
1638 if (!IS_ERR(reg_rule
))
1645 const struct ieee80211_reg_rule
*freq_reg_info(struct wiphy
*wiphy
,
1648 u32 min_bw
= center_freq
< MHZ_TO_KHZ(1000) ? 1 : 20;
1650 return __freq_reg_info(wiphy
, center_freq
, MHZ_TO_KHZ(min_bw
));
1652 EXPORT_SYMBOL(freq_reg_info
);
1654 const char *reg_initiator_name(enum nl80211_reg_initiator initiator
)
1656 switch (initiator
) {
1657 case NL80211_REGDOM_SET_BY_CORE
:
1659 case NL80211_REGDOM_SET_BY_USER
:
1661 case NL80211_REGDOM_SET_BY_DRIVER
:
1663 case NL80211_REGDOM_SET_BY_COUNTRY_IE
:
1664 return "country element";
1670 EXPORT_SYMBOL(reg_initiator_name
);
1672 static uint32_t reg_rule_to_chan_bw_flags(const struct ieee80211_regdomain
*regd
,
1673 const struct ieee80211_reg_rule
*reg_rule
,
1674 const struct ieee80211_channel
*chan
)
1676 const struct ieee80211_freq_range
*freq_range
= NULL
;
1677 u32 max_bandwidth_khz
, center_freq_khz
, bw_flags
= 0;
1678 bool is_s1g
= chan
->band
== NL80211_BAND_S1GHZ
;
1680 freq_range
= ®_rule
->freq_range
;
1682 max_bandwidth_khz
= freq_range
->max_bandwidth_khz
;
1683 center_freq_khz
= ieee80211_channel_to_khz(chan
);
1684 /* Check if auto calculation requested */
1685 if (reg_rule
->flags
& NL80211_RRF_AUTO_BW
)
1686 max_bandwidth_khz
= reg_get_max_bandwidth(regd
, reg_rule
);
1688 /* If we get a reg_rule we can assume that at least 5Mhz fit */
1689 if (!cfg80211_does_bw_fit_range(freq_range
,
1692 bw_flags
|= IEEE80211_CHAN_NO_10MHZ
;
1693 if (!cfg80211_does_bw_fit_range(freq_range
,
1696 bw_flags
|= IEEE80211_CHAN_NO_20MHZ
;
1699 /* S1G is strict about non overlapping channels. We can
1700 * calculate which bandwidth is allowed per channel by finding
1701 * the largest bandwidth which cleanly divides the freq_range.
1704 int ch_bw
= max_bandwidth_khz
;
1707 edge_offset
= (center_freq_khz
- ch_bw
/ 2) -
1708 freq_range
->start_freq_khz
;
1709 if (edge_offset
% ch_bw
== 0) {
1710 switch (KHZ_TO_MHZ(ch_bw
)) {
1712 bw_flags
|= IEEE80211_CHAN_1MHZ
;
1715 bw_flags
|= IEEE80211_CHAN_2MHZ
;
1718 bw_flags
|= IEEE80211_CHAN_4MHZ
;
1721 bw_flags
|= IEEE80211_CHAN_8MHZ
;
1724 bw_flags
|= IEEE80211_CHAN_16MHZ
;
1727 /* If we got here, no bandwidths fit on
1728 * this frequency, ie. band edge.
1730 bw_flags
|= IEEE80211_CHAN_DISABLED
;
1738 if (max_bandwidth_khz
< MHZ_TO_KHZ(10))
1739 bw_flags
|= IEEE80211_CHAN_NO_10MHZ
;
1740 if (max_bandwidth_khz
< MHZ_TO_KHZ(20))
1741 bw_flags
|= IEEE80211_CHAN_NO_20MHZ
;
1742 if (max_bandwidth_khz
< MHZ_TO_KHZ(40))
1743 bw_flags
|= IEEE80211_CHAN_NO_HT40
;
1744 if (max_bandwidth_khz
< MHZ_TO_KHZ(80))
1745 bw_flags
|= IEEE80211_CHAN_NO_80MHZ
;
1746 if (max_bandwidth_khz
< MHZ_TO_KHZ(160))
1747 bw_flags
|= IEEE80211_CHAN_NO_160MHZ
;
1752 static void handle_channel_single_rule(struct wiphy
*wiphy
,
1753 enum nl80211_reg_initiator initiator
,
1754 struct ieee80211_channel
*chan
,
1756 struct regulatory_request
*lr
,
1757 struct wiphy
*request_wiphy
,
1758 const struct ieee80211_reg_rule
*reg_rule
)
1761 const struct ieee80211_power_rule
*power_rule
= NULL
;
1762 const struct ieee80211_regdomain
*regd
;
1764 regd
= reg_get_regdomain(wiphy
);
1766 power_rule
= ®_rule
->power_rule
;
1767 bw_flags
= reg_rule_to_chan_bw_flags(regd
, reg_rule
, chan
);
1769 if (lr
->initiator
== NL80211_REGDOM_SET_BY_DRIVER
&&
1770 request_wiphy
&& request_wiphy
== wiphy
&&
1771 request_wiphy
->regulatory_flags
& REGULATORY_STRICT_REG
) {
1773 * This guarantees the driver's requested regulatory domain
1774 * will always be used as a base for further regulatory
1777 chan
->flags
= chan
->orig_flags
=
1778 map_regdom_flags(reg_rule
->flags
) | bw_flags
;
1779 chan
->max_antenna_gain
= chan
->orig_mag
=
1780 (int) MBI_TO_DBI(power_rule
->max_antenna_gain
);
1781 chan
->max_reg_power
= chan
->max_power
= chan
->orig_mpwr
=
1782 (int) MBM_TO_DBM(power_rule
->max_eirp
);
1784 if (chan
->flags
& IEEE80211_CHAN_RADAR
) {
1785 chan
->dfs_cac_ms
= IEEE80211_DFS_MIN_CAC_TIME_MS
;
1786 if (reg_rule
->dfs_cac_ms
)
1787 chan
->dfs_cac_ms
= reg_rule
->dfs_cac_ms
;
1793 chan
->dfs_state
= NL80211_DFS_USABLE
;
1794 chan
->dfs_state_entered
= jiffies
;
1796 chan
->beacon_found
= false;
1797 chan
->flags
= flags
| bw_flags
| map_regdom_flags(reg_rule
->flags
);
1798 chan
->max_antenna_gain
=
1799 min_t(int, chan
->orig_mag
,
1800 MBI_TO_DBI(power_rule
->max_antenna_gain
));
1801 chan
->max_reg_power
= (int) MBM_TO_DBM(power_rule
->max_eirp
);
1803 if (chan
->flags
& IEEE80211_CHAN_RADAR
) {
1804 if (reg_rule
->dfs_cac_ms
)
1805 chan
->dfs_cac_ms
= reg_rule
->dfs_cac_ms
;
1807 chan
->dfs_cac_ms
= IEEE80211_DFS_MIN_CAC_TIME_MS
;
1810 if (chan
->orig_mpwr
) {
1812 * Devices that use REGULATORY_COUNTRY_IE_FOLLOW_POWER
1813 * will always follow the passed country IE power settings.
1815 if (initiator
== NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
1816 wiphy
->regulatory_flags
& REGULATORY_COUNTRY_IE_FOLLOW_POWER
)
1817 chan
->max_power
= chan
->max_reg_power
;
1819 chan
->max_power
= min(chan
->orig_mpwr
,
1820 chan
->max_reg_power
);
1822 chan
->max_power
= chan
->max_reg_power
;
1825 static void handle_channel_adjacent_rules(struct wiphy
*wiphy
,
1826 enum nl80211_reg_initiator initiator
,
1827 struct ieee80211_channel
*chan
,
1829 struct regulatory_request
*lr
,
1830 struct wiphy
*request_wiphy
,
1831 const struct ieee80211_reg_rule
*rrule1
,
1832 const struct ieee80211_reg_rule
*rrule2
,
1833 struct ieee80211_freq_range
*comb_range
)
1837 const struct ieee80211_power_rule
*power_rule1
= NULL
;
1838 const struct ieee80211_power_rule
*power_rule2
= NULL
;
1839 const struct ieee80211_regdomain
*regd
;
1841 regd
= reg_get_regdomain(wiphy
);
1843 power_rule1
= &rrule1
->power_rule
;
1844 power_rule2
= &rrule2
->power_rule
;
1845 bw_flags1
= reg_rule_to_chan_bw_flags(regd
, rrule1
, chan
);
1846 bw_flags2
= reg_rule_to_chan_bw_flags(regd
, rrule2
, chan
);
1848 if (lr
->initiator
== NL80211_REGDOM_SET_BY_DRIVER
&&
1849 request_wiphy
&& request_wiphy
== wiphy
&&
1850 request_wiphy
->regulatory_flags
& REGULATORY_STRICT_REG
) {
1851 /* This guarantees the driver's requested regulatory domain
1852 * will always be used as a base for further regulatory
1856 map_regdom_flags(rrule1
->flags
) |
1857 map_regdom_flags(rrule2
->flags
) |
1860 chan
->orig_flags
= chan
->flags
;
1861 chan
->max_antenna_gain
=
1862 min_t(int, MBI_TO_DBI(power_rule1
->max_antenna_gain
),
1863 MBI_TO_DBI(power_rule2
->max_antenna_gain
));
1864 chan
->orig_mag
= chan
->max_antenna_gain
;
1865 chan
->max_reg_power
=
1866 min_t(int, MBM_TO_DBM(power_rule1
->max_eirp
),
1867 MBM_TO_DBM(power_rule2
->max_eirp
));
1868 chan
->max_power
= chan
->max_reg_power
;
1869 chan
->orig_mpwr
= chan
->max_reg_power
;
1871 if (chan
->flags
& IEEE80211_CHAN_RADAR
) {
1872 chan
->dfs_cac_ms
= IEEE80211_DFS_MIN_CAC_TIME_MS
;
1873 if (rrule1
->dfs_cac_ms
|| rrule2
->dfs_cac_ms
)
1874 chan
->dfs_cac_ms
= max_t(unsigned int,
1876 rrule2
->dfs_cac_ms
);
1882 chan
->dfs_state
= NL80211_DFS_USABLE
;
1883 chan
->dfs_state_entered
= jiffies
;
1885 chan
->beacon_found
= false;
1886 chan
->flags
= flags
| bw_flags1
| bw_flags2
|
1887 map_regdom_flags(rrule1
->flags
) |
1888 map_regdom_flags(rrule2
->flags
);
1890 /* reg_rule_to_chan_bw_flags may forbids 10 and forbids 20 MHz
1891 * (otherwise no adj. rule case), recheck therefore
1893 if (cfg80211_does_bw_fit_range(comb_range
,
1894 ieee80211_channel_to_khz(chan
),
1896 chan
->flags
&= ~IEEE80211_CHAN_NO_10MHZ
;
1897 if (cfg80211_does_bw_fit_range(comb_range
,
1898 ieee80211_channel_to_khz(chan
),
1900 chan
->flags
&= ~IEEE80211_CHAN_NO_20MHZ
;
1902 chan
->max_antenna_gain
=
1903 min_t(int, chan
->orig_mag
,
1905 MBI_TO_DBI(power_rule1
->max_antenna_gain
),
1906 MBI_TO_DBI(power_rule2
->max_antenna_gain
)));
1907 chan
->max_reg_power
= min_t(int,
1908 MBM_TO_DBM(power_rule1
->max_eirp
),
1909 MBM_TO_DBM(power_rule2
->max_eirp
));
1911 if (chan
->flags
& IEEE80211_CHAN_RADAR
) {
1912 if (rrule1
->dfs_cac_ms
|| rrule2
->dfs_cac_ms
)
1913 chan
->dfs_cac_ms
= max_t(unsigned int,
1915 rrule2
->dfs_cac_ms
);
1917 chan
->dfs_cac_ms
= IEEE80211_DFS_MIN_CAC_TIME_MS
;
1920 if (chan
->orig_mpwr
) {
1921 /* Devices that use REGULATORY_COUNTRY_IE_FOLLOW_POWER
1922 * will always follow the passed country IE power settings.
1924 if (initiator
== NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
1925 wiphy
->regulatory_flags
& REGULATORY_COUNTRY_IE_FOLLOW_POWER
)
1926 chan
->max_power
= chan
->max_reg_power
;
1928 chan
->max_power
= min(chan
->orig_mpwr
,
1929 chan
->max_reg_power
);
1931 chan
->max_power
= chan
->max_reg_power
;
1935 /* Note that right now we assume the desired channel bandwidth
1936 * is always 20 MHz for each individual channel (HT40 uses 20 MHz
1937 * per channel, the primary and the extension channel).
1939 static void handle_channel(struct wiphy
*wiphy
,
1940 enum nl80211_reg_initiator initiator
,
1941 struct ieee80211_channel
*chan
)
1943 const u32 orig_chan_freq
= ieee80211_channel_to_khz(chan
);
1944 struct regulatory_request
*lr
= get_last_request();
1945 struct wiphy
*request_wiphy
= wiphy_idx_to_wiphy(lr
->wiphy_idx
);
1946 const struct ieee80211_reg_rule
*rrule
= NULL
;
1947 const struct ieee80211_reg_rule
*rrule1
= NULL
;
1948 const struct ieee80211_reg_rule
*rrule2
= NULL
;
1950 u32 flags
= chan
->orig_flags
;
1952 rrule
= freq_reg_info(wiphy
, orig_chan_freq
);
1953 if (IS_ERR(rrule
)) {
1954 /* check for adjacent match, therefore get rules for
1955 * chan - 20 MHz and chan + 20 MHz and test
1956 * if reg rules are adjacent
1958 rrule1
= freq_reg_info(wiphy
,
1959 orig_chan_freq
- MHZ_TO_KHZ(20));
1960 rrule2
= freq_reg_info(wiphy
,
1961 orig_chan_freq
+ MHZ_TO_KHZ(20));
1962 if (!IS_ERR(rrule1
) && !IS_ERR(rrule2
)) {
1963 struct ieee80211_freq_range comb_range
;
1965 if (rrule1
->freq_range
.end_freq_khz
!=
1966 rrule2
->freq_range
.start_freq_khz
)
1969 comb_range
.start_freq_khz
=
1970 rrule1
->freq_range
.start_freq_khz
;
1971 comb_range
.end_freq_khz
=
1972 rrule2
->freq_range
.end_freq_khz
;
1973 comb_range
.max_bandwidth_khz
=
1975 rrule1
->freq_range
.max_bandwidth_khz
,
1976 rrule2
->freq_range
.max_bandwidth_khz
);
1978 if (!cfg80211_does_bw_fit_range(&comb_range
,
1983 handle_channel_adjacent_rules(wiphy
, initiator
, chan
,
1984 flags
, lr
, request_wiphy
,
1991 /* We will disable all channels that do not match our
1992 * received regulatory rule unless the hint is coming
1993 * from a Country IE and the Country IE had no information
1994 * about a band. The IEEE 802.11 spec allows for an AP
1995 * to send only a subset of the regulatory rules allowed,
1996 * so an AP in the US that only supports 2.4 GHz may only send
1997 * a country IE with information for the 2.4 GHz band
1998 * while 5 GHz is still supported.
2000 if (initiator
== NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
2001 PTR_ERR(rrule
) == -ERANGE
)
2004 if (lr
->initiator
== NL80211_REGDOM_SET_BY_DRIVER
&&
2005 request_wiphy
&& request_wiphy
== wiphy
&&
2006 request_wiphy
->regulatory_flags
& REGULATORY_STRICT_REG
) {
2007 pr_debug("Disabling freq %d.%03d MHz for good\n",
2008 chan
->center_freq
, chan
->freq_offset
);
2009 chan
->orig_flags
|= IEEE80211_CHAN_DISABLED
;
2010 chan
->flags
= chan
->orig_flags
;
2012 pr_debug("Disabling freq %d.%03d MHz\n",
2013 chan
->center_freq
, chan
->freq_offset
);
2014 chan
->flags
|= IEEE80211_CHAN_DISABLED
;
2019 handle_channel_single_rule(wiphy
, initiator
, chan
, flags
, lr
,
2020 request_wiphy
, rrule
);
2023 static void handle_band(struct wiphy
*wiphy
,
2024 enum nl80211_reg_initiator initiator
,
2025 struct ieee80211_supported_band
*sband
)
2032 for (i
= 0; i
< sband
->n_channels
; i
++)
2033 handle_channel(wiphy
, initiator
, &sband
->channels
[i
]);
2036 static bool reg_request_cell_base(struct regulatory_request
*request
)
2038 if (request
->initiator
!= NL80211_REGDOM_SET_BY_USER
)
2040 return request
->user_reg_hint_type
== NL80211_USER_REG_HINT_CELL_BASE
;
2043 bool reg_last_request_cell_base(void)
2045 return reg_request_cell_base(get_last_request());
2048 #ifdef CONFIG_CFG80211_REG_CELLULAR_HINTS
2049 /* Core specific check */
2050 static enum reg_request_treatment
2051 reg_ignore_cell_hint(struct regulatory_request
*pending_request
)
2053 struct regulatory_request
*lr
= get_last_request();
2055 if (!reg_num_devs_support_basehint
)
2056 return REG_REQ_IGNORE
;
2058 if (reg_request_cell_base(lr
) &&
2059 !regdom_changes(pending_request
->alpha2
))
2060 return REG_REQ_ALREADY_SET
;
2065 /* Device specific check */
2066 static bool reg_dev_ignore_cell_hint(struct wiphy
*wiphy
)
2068 return !(wiphy
->features
& NL80211_FEATURE_CELL_BASE_REG_HINTS
);
2071 static enum reg_request_treatment
2072 reg_ignore_cell_hint(struct regulatory_request
*pending_request
)
2074 return REG_REQ_IGNORE
;
2077 static bool reg_dev_ignore_cell_hint(struct wiphy
*wiphy
)
2083 static bool wiphy_strict_alpha2_regd(struct wiphy
*wiphy
)
2085 if (wiphy
->regulatory_flags
& REGULATORY_STRICT_REG
&&
2086 !(wiphy
->regulatory_flags
& REGULATORY_CUSTOM_REG
))
2091 static bool ignore_reg_update(struct wiphy
*wiphy
,
2092 enum nl80211_reg_initiator initiator
)
2094 struct regulatory_request
*lr
= get_last_request();
2096 if (wiphy
->regulatory_flags
& REGULATORY_WIPHY_SELF_MANAGED
)
2100 pr_debug("Ignoring regulatory request set by %s since last_request is not set\n",
2101 reg_initiator_name(initiator
));
2105 if (initiator
== NL80211_REGDOM_SET_BY_CORE
&&
2106 wiphy
->regulatory_flags
& REGULATORY_CUSTOM_REG
) {
2107 pr_debug("Ignoring regulatory request set by %s since the driver uses its own custom regulatory domain\n",
2108 reg_initiator_name(initiator
));
2113 * wiphy->regd will be set once the device has its own
2114 * desired regulatory domain set
2116 if (wiphy_strict_alpha2_regd(wiphy
) && !wiphy
->regd
&&
2117 initiator
!= NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
2118 !is_world_regdom(lr
->alpha2
)) {
2119 pr_debug("Ignoring regulatory request set by %s since the driver requires its own regulatory domain to be set first\n",
2120 reg_initiator_name(initiator
));
2124 if (reg_request_cell_base(lr
))
2125 return reg_dev_ignore_cell_hint(wiphy
);
2130 static bool reg_is_world_roaming(struct wiphy
*wiphy
)
2132 const struct ieee80211_regdomain
*cr
= get_cfg80211_regdom();
2133 const struct ieee80211_regdomain
*wr
= get_wiphy_regdom(wiphy
);
2134 struct regulatory_request
*lr
= get_last_request();
2136 if (is_world_regdom(cr
->alpha2
) || (wr
&& is_world_regdom(wr
->alpha2
)))
2139 if (lr
&& lr
->initiator
!= NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
2140 wiphy
->regulatory_flags
& REGULATORY_CUSTOM_REG
)
2146 static void handle_reg_beacon(struct wiphy
*wiphy
, unsigned int chan_idx
,
2147 struct reg_beacon
*reg_beacon
)
2149 struct ieee80211_supported_band
*sband
;
2150 struct ieee80211_channel
*chan
;
2151 bool channel_changed
= false;
2152 struct ieee80211_channel chan_before
;
2154 sband
= wiphy
->bands
[reg_beacon
->chan
.band
];
2155 chan
= &sband
->channels
[chan_idx
];
2157 if (likely(!ieee80211_channel_equal(chan
, ®_beacon
->chan
)))
2160 if (chan
->beacon_found
)
2163 chan
->beacon_found
= true;
2165 if (!reg_is_world_roaming(wiphy
))
2168 if (wiphy
->regulatory_flags
& REGULATORY_DISABLE_BEACON_HINTS
)
2171 chan_before
= *chan
;
2173 if (chan
->flags
& IEEE80211_CHAN_NO_IR
) {
2174 chan
->flags
&= ~IEEE80211_CHAN_NO_IR
;
2175 channel_changed
= true;
2178 if (channel_changed
)
2179 nl80211_send_beacon_hint_event(wiphy
, &chan_before
, chan
);
2183 * Called when a scan on a wiphy finds a beacon on
2186 static void wiphy_update_new_beacon(struct wiphy
*wiphy
,
2187 struct reg_beacon
*reg_beacon
)
2190 struct ieee80211_supported_band
*sband
;
2192 if (!wiphy
->bands
[reg_beacon
->chan
.band
])
2195 sband
= wiphy
->bands
[reg_beacon
->chan
.band
];
2197 for (i
= 0; i
< sband
->n_channels
; i
++)
2198 handle_reg_beacon(wiphy
, i
, reg_beacon
);
2202 * Called upon reg changes or a new wiphy is added
2204 static void wiphy_update_beacon_reg(struct wiphy
*wiphy
)
2207 struct ieee80211_supported_band
*sband
;
2208 struct reg_beacon
*reg_beacon
;
2210 list_for_each_entry(reg_beacon
, ®_beacon_list
, list
) {
2211 if (!wiphy
->bands
[reg_beacon
->chan
.band
])
2213 sband
= wiphy
->bands
[reg_beacon
->chan
.band
];
2214 for (i
= 0; i
< sband
->n_channels
; i
++)
2215 handle_reg_beacon(wiphy
, i
, reg_beacon
);
2219 /* Reap the advantages of previously found beacons */
2220 static void reg_process_beacons(struct wiphy
*wiphy
)
2223 * Means we are just firing up cfg80211, so no beacons would
2224 * have been processed yet.
2228 wiphy_update_beacon_reg(wiphy
);
2231 static bool is_ht40_allowed(struct ieee80211_channel
*chan
)
2235 if (chan
->flags
& IEEE80211_CHAN_DISABLED
)
2237 /* This would happen when regulatory rules disallow HT40 completely */
2238 if ((chan
->flags
& IEEE80211_CHAN_NO_HT40
) == IEEE80211_CHAN_NO_HT40
)
2243 static void reg_process_ht_flags_channel(struct wiphy
*wiphy
,
2244 struct ieee80211_channel
*channel
)
2246 struct ieee80211_supported_band
*sband
= wiphy
->bands
[channel
->band
];
2247 struct ieee80211_channel
*channel_before
= NULL
, *channel_after
= NULL
;
2248 const struct ieee80211_regdomain
*regd
;
2252 if (!is_ht40_allowed(channel
)) {
2253 channel
->flags
|= IEEE80211_CHAN_NO_HT40
;
2258 * We need to ensure the extension channels exist to
2259 * be able to use HT40- or HT40+, this finds them (or not)
2261 for (i
= 0; i
< sband
->n_channels
; i
++) {
2262 struct ieee80211_channel
*c
= &sband
->channels
[i
];
2264 if (c
->center_freq
== (channel
->center_freq
- 20))
2266 if (c
->center_freq
== (channel
->center_freq
+ 20))
2271 regd
= get_wiphy_regdom(wiphy
);
2273 const struct ieee80211_reg_rule
*reg_rule
=
2274 freq_reg_info_regd(MHZ_TO_KHZ(channel
->center_freq
),
2275 regd
, MHZ_TO_KHZ(20));
2277 if (!IS_ERR(reg_rule
))
2278 flags
= reg_rule
->flags
;
2282 * Please note that this assumes target bandwidth is 20 MHz,
2283 * if that ever changes we also need to change the below logic
2284 * to include that as well.
2286 if (!is_ht40_allowed(channel_before
) ||
2287 flags
& NL80211_RRF_NO_HT40MINUS
)
2288 channel
->flags
|= IEEE80211_CHAN_NO_HT40MINUS
;
2290 channel
->flags
&= ~IEEE80211_CHAN_NO_HT40MINUS
;
2292 if (!is_ht40_allowed(channel_after
) ||
2293 flags
& NL80211_RRF_NO_HT40PLUS
)
2294 channel
->flags
|= IEEE80211_CHAN_NO_HT40PLUS
;
2296 channel
->flags
&= ~IEEE80211_CHAN_NO_HT40PLUS
;
2299 static void reg_process_ht_flags_band(struct wiphy
*wiphy
,
2300 struct ieee80211_supported_band
*sband
)
2307 for (i
= 0; i
< sband
->n_channels
; i
++)
2308 reg_process_ht_flags_channel(wiphy
, &sband
->channels
[i
]);
2311 static void reg_process_ht_flags(struct wiphy
*wiphy
)
2313 enum nl80211_band band
;
2318 for (band
= 0; band
< NUM_NL80211_BANDS
; band
++)
2319 reg_process_ht_flags_band(wiphy
, wiphy
->bands
[band
]);
2322 static void reg_call_notifier(struct wiphy
*wiphy
,
2323 struct regulatory_request
*request
)
2325 if (wiphy
->reg_notifier
)
2326 wiphy
->reg_notifier(wiphy
, request
);
2329 static bool reg_wdev_chan_valid(struct wiphy
*wiphy
, struct wireless_dev
*wdev
)
2331 struct cfg80211_chan_def chandef
= {};
2332 struct cfg80211_registered_device
*rdev
= wiphy_to_rdev(wiphy
);
2333 enum nl80211_iftype iftype
;
2336 iftype
= wdev
->iftype
;
2338 /* make sure the interface is active */
2339 if (!wdev
->netdev
|| !netif_running(wdev
->netdev
))
2340 goto wdev_inactive_unlock
;
2343 case NL80211_IFTYPE_AP
:
2344 case NL80211_IFTYPE_P2P_GO
:
2345 if (!wdev
->beacon_interval
)
2346 goto wdev_inactive_unlock
;
2347 chandef
= wdev
->chandef
;
2349 case NL80211_IFTYPE_ADHOC
:
2350 if (!wdev
->ssid_len
)
2351 goto wdev_inactive_unlock
;
2352 chandef
= wdev
->chandef
;
2354 case NL80211_IFTYPE_STATION
:
2355 case NL80211_IFTYPE_P2P_CLIENT
:
2356 if (!wdev
->current_bss
||
2357 !wdev
->current_bss
->pub
.channel
)
2358 goto wdev_inactive_unlock
;
2360 if (!rdev
->ops
->get_channel
||
2361 rdev_get_channel(rdev
, wdev
, &chandef
))
2362 cfg80211_chandef_create(&chandef
,
2363 wdev
->current_bss
->pub
.channel
,
2364 NL80211_CHAN_NO_HT
);
2366 case NL80211_IFTYPE_MONITOR
:
2367 case NL80211_IFTYPE_AP_VLAN
:
2368 case NL80211_IFTYPE_P2P_DEVICE
:
2369 /* no enforcement required */
2372 /* others not implemented for now */
2380 case NL80211_IFTYPE_AP
:
2381 case NL80211_IFTYPE_P2P_GO
:
2382 case NL80211_IFTYPE_ADHOC
:
2383 return cfg80211_reg_can_beacon_relax(wiphy
, &chandef
, iftype
);
2384 case NL80211_IFTYPE_STATION
:
2385 case NL80211_IFTYPE_P2P_CLIENT
:
2386 return cfg80211_chandef_usable(wiphy
, &chandef
,
2387 IEEE80211_CHAN_DISABLED
);
2394 wdev_inactive_unlock
:
2399 static void reg_leave_invalid_chans(struct wiphy
*wiphy
)
2401 struct wireless_dev
*wdev
;
2402 struct cfg80211_registered_device
*rdev
= wiphy_to_rdev(wiphy
);
2406 list_for_each_entry(wdev
, &rdev
->wiphy
.wdev_list
, list
)
2407 if (!reg_wdev_chan_valid(wiphy
, wdev
))
2408 cfg80211_leave(rdev
, wdev
);
2411 static void reg_check_chans_work(struct work_struct
*work
)
2413 struct cfg80211_registered_device
*rdev
;
2415 pr_debug("Verifying active interfaces after reg change\n");
2418 list_for_each_entry(rdev
, &cfg80211_rdev_list
, list
)
2419 if (!(rdev
->wiphy
.regulatory_flags
&
2420 REGULATORY_IGNORE_STALE_KICKOFF
))
2421 reg_leave_invalid_chans(&rdev
->wiphy
);
2426 static void reg_check_channels(void)
2429 * Give usermode a chance to do something nicer (move to another
2430 * channel, orderly disconnection), before forcing a disconnection.
2432 mod_delayed_work(system_power_efficient_wq
,
2434 msecs_to_jiffies(REG_ENFORCE_GRACE_MS
));
2437 static void wiphy_update_regulatory(struct wiphy
*wiphy
,
2438 enum nl80211_reg_initiator initiator
)
2440 enum nl80211_band band
;
2441 struct regulatory_request
*lr
= get_last_request();
2443 if (ignore_reg_update(wiphy
, initiator
)) {
2445 * Regulatory updates set by CORE are ignored for custom
2446 * regulatory cards. Let us notify the changes to the driver,
2447 * as some drivers used this to restore its orig_* reg domain.
2449 if (initiator
== NL80211_REGDOM_SET_BY_CORE
&&
2450 wiphy
->regulatory_flags
& REGULATORY_CUSTOM_REG
&&
2451 !(wiphy
->regulatory_flags
&
2452 REGULATORY_WIPHY_SELF_MANAGED
))
2453 reg_call_notifier(wiphy
, lr
);
2457 lr
->dfs_region
= get_cfg80211_regdom()->dfs_region
;
2459 for (band
= 0; band
< NUM_NL80211_BANDS
; band
++)
2460 handle_band(wiphy
, initiator
, wiphy
->bands
[band
]);
2462 reg_process_beacons(wiphy
);
2463 reg_process_ht_flags(wiphy
);
2464 reg_call_notifier(wiphy
, lr
);
2467 static void update_all_wiphy_regulatory(enum nl80211_reg_initiator initiator
)
2469 struct cfg80211_registered_device
*rdev
;
2470 struct wiphy
*wiphy
;
2474 list_for_each_entry(rdev
, &cfg80211_rdev_list
, list
) {
2475 wiphy
= &rdev
->wiphy
;
2476 wiphy_update_regulatory(wiphy
, initiator
);
2479 reg_check_channels();
2482 static void handle_channel_custom(struct wiphy
*wiphy
,
2483 struct ieee80211_channel
*chan
,
2484 const struct ieee80211_regdomain
*regd
,
2488 const struct ieee80211_reg_rule
*reg_rule
= NULL
;
2489 const struct ieee80211_power_rule
*power_rule
= NULL
;
2490 u32 bw
, center_freq_khz
;
2492 center_freq_khz
= ieee80211_channel_to_khz(chan
);
2493 for (bw
= MHZ_TO_KHZ(20); bw
>= min_bw
; bw
= bw
/ 2) {
2494 reg_rule
= freq_reg_info_regd(center_freq_khz
, regd
, bw
);
2495 if (!IS_ERR(reg_rule
))
2499 if (IS_ERR_OR_NULL(reg_rule
)) {
2500 pr_debug("Disabling freq %d.%03d MHz as custom regd has no rule that fits it\n",
2501 chan
->center_freq
, chan
->freq_offset
);
2502 if (wiphy
->regulatory_flags
& REGULATORY_WIPHY_SELF_MANAGED
) {
2503 chan
->flags
|= IEEE80211_CHAN_DISABLED
;
2505 chan
->orig_flags
|= IEEE80211_CHAN_DISABLED
;
2506 chan
->flags
= chan
->orig_flags
;
2511 power_rule
= ®_rule
->power_rule
;
2512 bw_flags
= reg_rule_to_chan_bw_flags(regd
, reg_rule
, chan
);
2514 chan
->dfs_state_entered
= jiffies
;
2515 chan
->dfs_state
= NL80211_DFS_USABLE
;
2517 chan
->beacon_found
= false;
2519 if (wiphy
->regulatory_flags
& REGULATORY_WIPHY_SELF_MANAGED
)
2520 chan
->flags
= chan
->orig_flags
| bw_flags
|
2521 map_regdom_flags(reg_rule
->flags
);
2523 chan
->flags
|= map_regdom_flags(reg_rule
->flags
) | bw_flags
;
2525 chan
->max_antenna_gain
= (int) MBI_TO_DBI(power_rule
->max_antenna_gain
);
2526 chan
->max_reg_power
= chan
->max_power
=
2527 (int) MBM_TO_DBM(power_rule
->max_eirp
);
2529 if (chan
->flags
& IEEE80211_CHAN_RADAR
) {
2530 if (reg_rule
->dfs_cac_ms
)
2531 chan
->dfs_cac_ms
= reg_rule
->dfs_cac_ms
;
2533 chan
->dfs_cac_ms
= IEEE80211_DFS_MIN_CAC_TIME_MS
;
2536 chan
->max_power
= chan
->max_reg_power
;
2539 static void handle_band_custom(struct wiphy
*wiphy
,
2540 struct ieee80211_supported_band
*sband
,
2541 const struct ieee80211_regdomain
*regd
)
2549 * We currently assume that you always want at least 20 MHz,
2550 * otherwise channel 12 might get enabled if this rule is
2551 * compatible to US, which permits 2402 - 2472 MHz.
2553 for (i
= 0; i
< sband
->n_channels
; i
++)
2554 handle_channel_custom(wiphy
, &sband
->channels
[i
], regd
,
2558 /* Used by drivers prior to wiphy registration */
2559 void wiphy_apply_custom_regulatory(struct wiphy
*wiphy
,
2560 const struct ieee80211_regdomain
*regd
)
2562 const struct ieee80211_regdomain
*new_regd
, *tmp
;
2563 enum nl80211_band band
;
2564 unsigned int bands_set
= 0;
2566 WARN(!(wiphy
->regulatory_flags
& REGULATORY_CUSTOM_REG
),
2567 "wiphy should have REGULATORY_CUSTOM_REG\n");
2568 wiphy
->regulatory_flags
|= REGULATORY_CUSTOM_REG
;
2570 for (band
= 0; band
< NUM_NL80211_BANDS
; band
++) {
2571 if (!wiphy
->bands
[band
])
2573 handle_band_custom(wiphy
, wiphy
->bands
[band
], regd
);
2578 * no point in calling this if it won't have any effect
2579 * on your device's supported bands.
2581 WARN_ON(!bands_set
);
2582 new_regd
= reg_copy_regd(regd
);
2583 if (IS_ERR(new_regd
))
2589 tmp
= get_wiphy_regdom(wiphy
);
2590 rcu_assign_pointer(wiphy
->regd
, new_regd
);
2591 rcu_free_regdom(tmp
);
2593 wiphy_unlock(wiphy
);
2596 EXPORT_SYMBOL(wiphy_apply_custom_regulatory
);
2598 static void reg_set_request_processed(void)
2600 bool need_more_processing
= false;
2601 struct regulatory_request
*lr
= get_last_request();
2603 lr
->processed
= true;
2605 spin_lock(®_requests_lock
);
2606 if (!list_empty(®_requests_list
))
2607 need_more_processing
= true;
2608 spin_unlock(®_requests_lock
);
2610 cancel_crda_timeout();
2612 if (need_more_processing
)
2613 schedule_work(®_work
);
2617 * reg_process_hint_core - process core regulatory requests
2618 * @core_request: a pending core regulatory request
2620 * The wireless subsystem can use this function to process
2621 * a regulatory request issued by the regulatory core.
2623 static enum reg_request_treatment
2624 reg_process_hint_core(struct regulatory_request
*core_request
)
2626 if (reg_query_database(core_request
)) {
2627 core_request
->intersect
= false;
2628 core_request
->processed
= false;
2629 reg_update_last_request(core_request
);
2633 return REG_REQ_IGNORE
;
2636 static enum reg_request_treatment
2637 __reg_process_hint_user(struct regulatory_request
*user_request
)
2639 struct regulatory_request
*lr
= get_last_request();
2641 if (reg_request_cell_base(user_request
))
2642 return reg_ignore_cell_hint(user_request
);
2644 if (reg_request_cell_base(lr
))
2645 return REG_REQ_IGNORE
;
2647 if (lr
->initiator
== NL80211_REGDOM_SET_BY_COUNTRY_IE
)
2648 return REG_REQ_INTERSECT
;
2650 * If the user knows better the user should set the regdom
2651 * to their country before the IE is picked up
2653 if (lr
->initiator
== NL80211_REGDOM_SET_BY_USER
&&
2655 return REG_REQ_IGNORE
;
2657 * Process user requests only after previous user/driver/core
2658 * requests have been processed
2660 if ((lr
->initiator
== NL80211_REGDOM_SET_BY_CORE
||
2661 lr
->initiator
== NL80211_REGDOM_SET_BY_DRIVER
||
2662 lr
->initiator
== NL80211_REGDOM_SET_BY_USER
) &&
2663 regdom_changes(lr
->alpha2
))
2664 return REG_REQ_IGNORE
;
2666 if (!regdom_changes(user_request
->alpha2
))
2667 return REG_REQ_ALREADY_SET
;
2673 * reg_process_hint_user - process user regulatory requests
2674 * @user_request: a pending user regulatory request
2676 * The wireless subsystem can use this function to process
2677 * a regulatory request initiated by userspace.
2679 static enum reg_request_treatment
2680 reg_process_hint_user(struct regulatory_request
*user_request
)
2682 enum reg_request_treatment treatment
;
2684 treatment
= __reg_process_hint_user(user_request
);
2685 if (treatment
== REG_REQ_IGNORE
||
2686 treatment
== REG_REQ_ALREADY_SET
)
2687 return REG_REQ_IGNORE
;
2689 user_request
->intersect
= treatment
== REG_REQ_INTERSECT
;
2690 user_request
->processed
= false;
2692 if (reg_query_database(user_request
)) {
2693 reg_update_last_request(user_request
);
2694 user_alpha2
[0] = user_request
->alpha2
[0];
2695 user_alpha2
[1] = user_request
->alpha2
[1];
2699 return REG_REQ_IGNORE
;
2702 static enum reg_request_treatment
2703 __reg_process_hint_driver(struct regulatory_request
*driver_request
)
2705 struct regulatory_request
*lr
= get_last_request();
2707 if (lr
->initiator
== NL80211_REGDOM_SET_BY_CORE
) {
2708 if (regdom_changes(driver_request
->alpha2
))
2710 return REG_REQ_ALREADY_SET
;
2714 * This would happen if you unplug and plug your card
2715 * back in or if you add a new device for which the previously
2716 * loaded card also agrees on the regulatory domain.
2718 if (lr
->initiator
== NL80211_REGDOM_SET_BY_DRIVER
&&
2719 !regdom_changes(driver_request
->alpha2
))
2720 return REG_REQ_ALREADY_SET
;
2722 return REG_REQ_INTERSECT
;
2726 * reg_process_hint_driver - process driver regulatory requests
2727 * @wiphy: the wireless device for the regulatory request
2728 * @driver_request: a pending driver regulatory request
2730 * The wireless subsystem can use this function to process
2731 * a regulatory request issued by an 802.11 driver.
2733 * Returns one of the different reg request treatment values.
2735 static enum reg_request_treatment
2736 reg_process_hint_driver(struct wiphy
*wiphy
,
2737 struct regulatory_request
*driver_request
)
2739 const struct ieee80211_regdomain
*regd
, *tmp
;
2740 enum reg_request_treatment treatment
;
2742 treatment
= __reg_process_hint_driver(driver_request
);
2744 switch (treatment
) {
2747 case REG_REQ_IGNORE
:
2748 return REG_REQ_IGNORE
;
2749 case REG_REQ_INTERSECT
:
2750 case REG_REQ_ALREADY_SET
:
2751 regd
= reg_copy_regd(get_cfg80211_regdom());
2753 return REG_REQ_IGNORE
;
2755 tmp
= get_wiphy_regdom(wiphy
);
2758 rcu_assign_pointer(wiphy
->regd
, regd
);
2759 wiphy_unlock(wiphy
);
2760 rcu_free_regdom(tmp
);
2764 driver_request
->intersect
= treatment
== REG_REQ_INTERSECT
;
2765 driver_request
->processed
= false;
2768 * Since CRDA will not be called in this case as we already
2769 * have applied the requested regulatory domain before we just
2770 * inform userspace we have processed the request
2772 if (treatment
== REG_REQ_ALREADY_SET
) {
2773 nl80211_send_reg_change_event(driver_request
);
2774 reg_update_last_request(driver_request
);
2775 reg_set_request_processed();
2776 return REG_REQ_ALREADY_SET
;
2779 if (reg_query_database(driver_request
)) {
2780 reg_update_last_request(driver_request
);
2784 return REG_REQ_IGNORE
;
2787 static enum reg_request_treatment
2788 __reg_process_hint_country_ie(struct wiphy
*wiphy
,
2789 struct regulatory_request
*country_ie_request
)
2791 struct wiphy
*last_wiphy
= NULL
;
2792 struct regulatory_request
*lr
= get_last_request();
2794 if (reg_request_cell_base(lr
)) {
2795 /* Trust a Cell base station over the AP's country IE */
2796 if (regdom_changes(country_ie_request
->alpha2
))
2797 return REG_REQ_IGNORE
;
2798 return REG_REQ_ALREADY_SET
;
2800 if (wiphy
->regulatory_flags
& REGULATORY_COUNTRY_IE_IGNORE
)
2801 return REG_REQ_IGNORE
;
2804 if (unlikely(!is_an_alpha2(country_ie_request
->alpha2
)))
2807 if (lr
->initiator
!= NL80211_REGDOM_SET_BY_COUNTRY_IE
)
2810 last_wiphy
= wiphy_idx_to_wiphy(lr
->wiphy_idx
);
2812 if (last_wiphy
!= wiphy
) {
2814 * Two cards with two APs claiming different
2815 * Country IE alpha2s. We could
2816 * intersect them, but that seems unlikely
2817 * to be correct. Reject second one for now.
2819 if (regdom_changes(country_ie_request
->alpha2
))
2820 return REG_REQ_IGNORE
;
2821 return REG_REQ_ALREADY_SET
;
2824 if (regdom_changes(country_ie_request
->alpha2
))
2826 return REG_REQ_ALREADY_SET
;
2830 * reg_process_hint_country_ie - process regulatory requests from country IEs
2831 * @wiphy: the wireless device for the regulatory request
2832 * @country_ie_request: a regulatory request from a country IE
2834 * The wireless subsystem can use this function to process
2835 * a regulatory request issued by a country Information Element.
2837 * Returns one of the different reg request treatment values.
2839 static enum reg_request_treatment
2840 reg_process_hint_country_ie(struct wiphy
*wiphy
,
2841 struct regulatory_request
*country_ie_request
)
2843 enum reg_request_treatment treatment
;
2845 treatment
= __reg_process_hint_country_ie(wiphy
, country_ie_request
);
2847 switch (treatment
) {
2850 case REG_REQ_IGNORE
:
2851 return REG_REQ_IGNORE
;
2852 case REG_REQ_ALREADY_SET
:
2853 reg_free_request(country_ie_request
);
2854 return REG_REQ_ALREADY_SET
;
2855 case REG_REQ_INTERSECT
:
2857 * This doesn't happen yet, not sure we
2858 * ever want to support it for this case.
2860 WARN_ONCE(1, "Unexpected intersection for country elements");
2861 return REG_REQ_IGNORE
;
2864 country_ie_request
->intersect
= false;
2865 country_ie_request
->processed
= false;
2867 if (reg_query_database(country_ie_request
)) {
2868 reg_update_last_request(country_ie_request
);
2872 return REG_REQ_IGNORE
;
2875 bool reg_dfs_domain_same(struct wiphy
*wiphy1
, struct wiphy
*wiphy2
)
2877 const struct ieee80211_regdomain
*wiphy1_regd
= NULL
;
2878 const struct ieee80211_regdomain
*wiphy2_regd
= NULL
;
2879 const struct ieee80211_regdomain
*cfg80211_regd
= NULL
;
2880 bool dfs_domain_same
;
2884 cfg80211_regd
= rcu_dereference(cfg80211_regdomain
);
2885 wiphy1_regd
= rcu_dereference(wiphy1
->regd
);
2887 wiphy1_regd
= cfg80211_regd
;
2889 wiphy2_regd
= rcu_dereference(wiphy2
->regd
);
2891 wiphy2_regd
= cfg80211_regd
;
2893 dfs_domain_same
= wiphy1_regd
->dfs_region
== wiphy2_regd
->dfs_region
;
2897 return dfs_domain_same
;
2900 static void reg_copy_dfs_chan_state(struct ieee80211_channel
*dst_chan
,
2901 struct ieee80211_channel
*src_chan
)
2903 if (!(dst_chan
->flags
& IEEE80211_CHAN_RADAR
) ||
2904 !(src_chan
->flags
& IEEE80211_CHAN_RADAR
))
2907 if (dst_chan
->flags
& IEEE80211_CHAN_DISABLED
||
2908 src_chan
->flags
& IEEE80211_CHAN_DISABLED
)
2911 if (src_chan
->center_freq
== dst_chan
->center_freq
&&
2912 dst_chan
->dfs_state
== NL80211_DFS_USABLE
) {
2913 dst_chan
->dfs_state
= src_chan
->dfs_state
;
2914 dst_chan
->dfs_state_entered
= src_chan
->dfs_state_entered
;
2918 static void wiphy_share_dfs_chan_state(struct wiphy
*dst_wiphy
,
2919 struct wiphy
*src_wiphy
)
2921 struct ieee80211_supported_band
*src_sband
, *dst_sband
;
2922 struct ieee80211_channel
*src_chan
, *dst_chan
;
2925 if (!reg_dfs_domain_same(dst_wiphy
, src_wiphy
))
2928 for (band
= 0; band
< NUM_NL80211_BANDS
; band
++) {
2929 dst_sband
= dst_wiphy
->bands
[band
];
2930 src_sband
= src_wiphy
->bands
[band
];
2931 if (!dst_sband
|| !src_sband
)
2934 for (i
= 0; i
< dst_sband
->n_channels
; i
++) {
2935 dst_chan
= &dst_sband
->channels
[i
];
2936 for (j
= 0; j
< src_sband
->n_channels
; j
++) {
2937 src_chan
= &src_sband
->channels
[j
];
2938 reg_copy_dfs_chan_state(dst_chan
, src_chan
);
2944 static void wiphy_all_share_dfs_chan_state(struct wiphy
*wiphy
)
2946 struct cfg80211_registered_device
*rdev
;
2950 list_for_each_entry(rdev
, &cfg80211_rdev_list
, list
) {
2951 if (wiphy
== &rdev
->wiphy
)
2953 wiphy_share_dfs_chan_state(wiphy
, &rdev
->wiphy
);
2957 /* This processes *all* regulatory hints */
2958 static void reg_process_hint(struct regulatory_request
*reg_request
)
2960 struct wiphy
*wiphy
= NULL
;
2961 enum reg_request_treatment treatment
;
2962 enum nl80211_reg_initiator initiator
= reg_request
->initiator
;
2964 if (reg_request
->wiphy_idx
!= WIPHY_IDX_INVALID
)
2965 wiphy
= wiphy_idx_to_wiphy(reg_request
->wiphy_idx
);
2967 switch (initiator
) {
2968 case NL80211_REGDOM_SET_BY_CORE
:
2969 treatment
= reg_process_hint_core(reg_request
);
2971 case NL80211_REGDOM_SET_BY_USER
:
2972 treatment
= reg_process_hint_user(reg_request
);
2974 case NL80211_REGDOM_SET_BY_DRIVER
:
2977 treatment
= reg_process_hint_driver(wiphy
, reg_request
);
2979 case NL80211_REGDOM_SET_BY_COUNTRY_IE
:
2982 treatment
= reg_process_hint_country_ie(wiphy
, reg_request
);
2985 WARN(1, "invalid initiator %d\n", initiator
);
2989 if (treatment
== REG_REQ_IGNORE
)
2992 WARN(treatment
!= REG_REQ_OK
&& treatment
!= REG_REQ_ALREADY_SET
,
2993 "unexpected treatment value %d\n", treatment
);
2995 /* This is required so that the orig_* parameters are saved.
2996 * NOTE: treatment must be set for any case that reaches here!
2998 if (treatment
== REG_REQ_ALREADY_SET
&& wiphy
&&
2999 wiphy
->regulatory_flags
& REGULATORY_STRICT_REG
) {
3000 wiphy_update_regulatory(wiphy
, initiator
);
3001 wiphy_all_share_dfs_chan_state(wiphy
);
3002 reg_check_channels();
3008 reg_free_request(reg_request
);
3011 static void notify_self_managed_wiphys(struct regulatory_request
*request
)
3013 struct cfg80211_registered_device
*rdev
;
3014 struct wiphy
*wiphy
;
3016 list_for_each_entry(rdev
, &cfg80211_rdev_list
, list
) {
3017 wiphy
= &rdev
->wiphy
;
3018 if (wiphy
->regulatory_flags
& REGULATORY_WIPHY_SELF_MANAGED
&&
3019 request
->initiator
== NL80211_REGDOM_SET_BY_USER
)
3020 reg_call_notifier(wiphy
, request
);
3025 * Processes regulatory hints, this is all the NL80211_REGDOM_SET_BY_*
3026 * Regulatory hints come on a first come first serve basis and we
3027 * must process each one atomically.
3029 static void reg_process_pending_hints(void)
3031 struct regulatory_request
*reg_request
, *lr
;
3033 lr
= get_last_request();
3035 /* When last_request->processed becomes true this will be rescheduled */
3036 if (lr
&& !lr
->processed
) {
3037 pr_debug("Pending regulatory request, waiting for it to be processed...\n");
3041 spin_lock(®_requests_lock
);
3043 if (list_empty(®_requests_list
)) {
3044 spin_unlock(®_requests_lock
);
3048 reg_request
= list_first_entry(®_requests_list
,
3049 struct regulatory_request
,
3051 list_del_init(®_request
->list
);
3053 spin_unlock(®_requests_lock
);
3055 notify_self_managed_wiphys(reg_request
);
3057 reg_process_hint(reg_request
);
3059 lr
= get_last_request();
3061 spin_lock(®_requests_lock
);
3062 if (!list_empty(®_requests_list
) && lr
&& lr
->processed
)
3063 schedule_work(®_work
);
3064 spin_unlock(®_requests_lock
);
3067 /* Processes beacon hints -- this has nothing to do with country IEs */
3068 static void reg_process_pending_beacon_hints(void)
3070 struct cfg80211_registered_device
*rdev
;
3071 struct reg_beacon
*pending_beacon
, *tmp
;
3073 /* This goes through the _pending_ beacon list */
3074 spin_lock_bh(®_pending_beacons_lock
);
3076 list_for_each_entry_safe(pending_beacon
, tmp
,
3077 ®_pending_beacons
, list
) {
3078 list_del_init(&pending_beacon
->list
);
3080 /* Applies the beacon hint to current wiphys */
3081 list_for_each_entry(rdev
, &cfg80211_rdev_list
, list
)
3082 wiphy_update_new_beacon(&rdev
->wiphy
, pending_beacon
);
3084 /* Remembers the beacon hint for new wiphys or reg changes */
3085 list_add_tail(&pending_beacon
->list
, ®_beacon_list
);
3088 spin_unlock_bh(®_pending_beacons_lock
);
3091 static void reg_process_self_managed_hint(struct wiphy
*wiphy
)
3093 struct cfg80211_registered_device
*rdev
= wiphy_to_rdev(wiphy
);
3094 const struct ieee80211_regdomain
*tmp
;
3095 const struct ieee80211_regdomain
*regd
;
3096 enum nl80211_band band
;
3097 struct regulatory_request request
= {};
3100 lockdep_assert_wiphy(wiphy
);
3102 spin_lock(®_requests_lock
);
3103 regd
= rdev
->requested_regd
;
3104 rdev
->requested_regd
= NULL
;
3105 spin_unlock(®_requests_lock
);
3110 tmp
= get_wiphy_regdom(wiphy
);
3111 rcu_assign_pointer(wiphy
->regd
, regd
);
3112 rcu_free_regdom(tmp
);
3114 for (band
= 0; band
< NUM_NL80211_BANDS
; band
++)
3115 handle_band_custom(wiphy
, wiphy
->bands
[band
], regd
);
3117 reg_process_ht_flags(wiphy
);
3119 request
.wiphy_idx
= get_wiphy_idx(wiphy
);
3120 request
.alpha2
[0] = regd
->alpha2
[0];
3121 request
.alpha2
[1] = regd
->alpha2
[1];
3122 request
.initiator
= NL80211_REGDOM_SET_BY_DRIVER
;
3124 nl80211_send_wiphy_reg_change_event(&request
);
3127 static void reg_process_self_managed_hints(void)
3129 struct cfg80211_registered_device
*rdev
;
3133 list_for_each_entry(rdev
, &cfg80211_rdev_list
, list
) {
3134 wiphy_lock(&rdev
->wiphy
);
3135 reg_process_self_managed_hint(&rdev
->wiphy
);
3136 wiphy_unlock(&rdev
->wiphy
);
3139 reg_check_channels();
3142 static void reg_todo(struct work_struct
*work
)
3145 reg_process_pending_hints();
3146 reg_process_pending_beacon_hints();
3147 reg_process_self_managed_hints();
3151 static void queue_regulatory_request(struct regulatory_request
*request
)
3153 request
->alpha2
[0] = toupper(request
->alpha2
[0]);
3154 request
->alpha2
[1] = toupper(request
->alpha2
[1]);
3156 spin_lock(®_requests_lock
);
3157 list_add_tail(&request
->list
, ®_requests_list
);
3158 spin_unlock(®_requests_lock
);
3160 schedule_work(®_work
);
3164 * Core regulatory hint -- happens during cfg80211_init()
3165 * and when we restore regulatory settings.
3167 static int regulatory_hint_core(const char *alpha2
)
3169 struct regulatory_request
*request
;
3171 request
= kzalloc(sizeof(struct regulatory_request
), GFP_KERNEL
);
3175 request
->alpha2
[0] = alpha2
[0];
3176 request
->alpha2
[1] = alpha2
[1];
3177 request
->initiator
= NL80211_REGDOM_SET_BY_CORE
;
3178 request
->wiphy_idx
= WIPHY_IDX_INVALID
;
3180 queue_regulatory_request(request
);
3186 int regulatory_hint_user(const char *alpha2
,
3187 enum nl80211_user_reg_hint_type user_reg_hint_type
)
3189 struct regulatory_request
*request
;
3191 if (WARN_ON(!alpha2
))
3194 if (!is_world_regdom(alpha2
) && !is_an_alpha2(alpha2
))
3197 request
= kzalloc(sizeof(struct regulatory_request
), GFP_KERNEL
);
3201 request
->wiphy_idx
= WIPHY_IDX_INVALID
;
3202 request
->alpha2
[0] = alpha2
[0];
3203 request
->alpha2
[1] = alpha2
[1];
3204 request
->initiator
= NL80211_REGDOM_SET_BY_USER
;
3205 request
->user_reg_hint_type
= user_reg_hint_type
;
3207 /* Allow calling CRDA again */
3208 reset_crda_timeouts();
3210 queue_regulatory_request(request
);
3215 int regulatory_hint_indoor(bool is_indoor
, u32 portid
)
3217 spin_lock(®_indoor_lock
);
3219 /* It is possible that more than one user space process is trying to
3220 * configure the indoor setting. To handle such cases, clear the indoor
3221 * setting in case that some process does not think that the device
3222 * is operating in an indoor environment. In addition, if a user space
3223 * process indicates that it is controlling the indoor setting, save its
3224 * portid, i.e., make it the owner.
3226 reg_is_indoor
= is_indoor
;
3227 if (reg_is_indoor
) {
3228 if (!reg_is_indoor_portid
)
3229 reg_is_indoor_portid
= portid
;
3231 reg_is_indoor_portid
= 0;
3234 spin_unlock(®_indoor_lock
);
3237 reg_check_channels();
3242 void regulatory_netlink_notify(u32 portid
)
3244 spin_lock(®_indoor_lock
);
3246 if (reg_is_indoor_portid
!= portid
) {
3247 spin_unlock(®_indoor_lock
);
3251 reg_is_indoor
= false;
3252 reg_is_indoor_portid
= 0;
3254 spin_unlock(®_indoor_lock
);
3256 reg_check_channels();
3260 int regulatory_hint(struct wiphy
*wiphy
, const char *alpha2
)
3262 struct regulatory_request
*request
;
3264 if (WARN_ON(!alpha2
|| !wiphy
))
3267 wiphy
->regulatory_flags
&= ~REGULATORY_CUSTOM_REG
;
3269 request
= kzalloc(sizeof(struct regulatory_request
), GFP_KERNEL
);
3273 request
->wiphy_idx
= get_wiphy_idx(wiphy
);
3275 request
->alpha2
[0] = alpha2
[0];
3276 request
->alpha2
[1] = alpha2
[1];
3277 request
->initiator
= NL80211_REGDOM_SET_BY_DRIVER
;
3279 /* Allow calling CRDA again */
3280 reset_crda_timeouts();
3282 queue_regulatory_request(request
);
3286 EXPORT_SYMBOL(regulatory_hint
);
3288 void regulatory_hint_country_ie(struct wiphy
*wiphy
, enum nl80211_band band
,
3289 const u8
*country_ie
, u8 country_ie_len
)
3292 enum environment_cap env
= ENVIRON_ANY
;
3293 struct regulatory_request
*request
= NULL
, *lr
;
3295 /* IE len must be evenly divisible by 2 */
3296 if (country_ie_len
& 0x01)
3299 if (country_ie_len
< IEEE80211_COUNTRY_IE_MIN_LEN
)
3302 request
= kzalloc(sizeof(*request
), GFP_KERNEL
);
3306 alpha2
[0] = country_ie
[0];
3307 alpha2
[1] = country_ie
[1];
3309 if (country_ie
[2] == 'I')
3310 env
= ENVIRON_INDOOR
;
3311 else if (country_ie
[2] == 'O')
3312 env
= ENVIRON_OUTDOOR
;
3315 lr
= get_last_request();
3321 * We will run this only upon a successful connection on cfg80211.
3322 * We leave conflict resolution to the workqueue, where can hold
3325 if (lr
->initiator
== NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
3326 lr
->wiphy_idx
!= WIPHY_IDX_INVALID
)
3329 request
->wiphy_idx
= get_wiphy_idx(wiphy
);
3330 request
->alpha2
[0] = alpha2
[0];
3331 request
->alpha2
[1] = alpha2
[1];
3332 request
->initiator
= NL80211_REGDOM_SET_BY_COUNTRY_IE
;
3333 request
->country_ie_env
= env
;
3335 /* Allow calling CRDA again */
3336 reset_crda_timeouts();
3338 queue_regulatory_request(request
);
3345 static void restore_alpha2(char *alpha2
, bool reset_user
)
3347 /* indicates there is no alpha2 to consider for restoration */
3351 /* The user setting has precedence over the module parameter */
3352 if (is_user_regdom_saved()) {
3353 /* Unless we're asked to ignore it and reset it */
3355 pr_debug("Restoring regulatory settings including user preference\n");
3356 user_alpha2
[0] = '9';
3357 user_alpha2
[1] = '7';
3360 * If we're ignoring user settings, we still need to
3361 * check the module parameter to ensure we put things
3362 * back as they were for a full restore.
3364 if (!is_world_regdom(ieee80211_regdom
)) {
3365 pr_debug("Keeping preference on module parameter ieee80211_regdom: %c%c\n",
3366 ieee80211_regdom
[0], ieee80211_regdom
[1]);
3367 alpha2
[0] = ieee80211_regdom
[0];
3368 alpha2
[1] = ieee80211_regdom
[1];
3371 pr_debug("Restoring regulatory settings while preserving user preference for: %c%c\n",
3372 user_alpha2
[0], user_alpha2
[1]);
3373 alpha2
[0] = user_alpha2
[0];
3374 alpha2
[1] = user_alpha2
[1];
3376 } else if (!is_world_regdom(ieee80211_regdom
)) {
3377 pr_debug("Keeping preference on module parameter ieee80211_regdom: %c%c\n",
3378 ieee80211_regdom
[0], ieee80211_regdom
[1]);
3379 alpha2
[0] = ieee80211_regdom
[0];
3380 alpha2
[1] = ieee80211_regdom
[1];
3382 pr_debug("Restoring regulatory settings\n");
3385 static void restore_custom_reg_settings(struct wiphy
*wiphy
)
3387 struct ieee80211_supported_band
*sband
;
3388 enum nl80211_band band
;
3389 struct ieee80211_channel
*chan
;
3392 for (band
= 0; band
< NUM_NL80211_BANDS
; band
++) {
3393 sband
= wiphy
->bands
[band
];
3396 for (i
= 0; i
< sband
->n_channels
; i
++) {
3397 chan
= &sband
->channels
[i
];
3398 chan
->flags
= chan
->orig_flags
;
3399 chan
->max_antenna_gain
= chan
->orig_mag
;
3400 chan
->max_power
= chan
->orig_mpwr
;
3401 chan
->beacon_found
= false;
3407 * Restoring regulatory settings involves ignoring any
3408 * possibly stale country IE information and user regulatory
3409 * settings if so desired, this includes any beacon hints
3410 * learned as we could have traveled outside to another country
3411 * after disconnection. To restore regulatory settings we do
3412 * exactly what we did at bootup:
3414 * - send a core regulatory hint
3415 * - send a user regulatory hint if applicable
3417 * Device drivers that send a regulatory hint for a specific country
3418 * keep their own regulatory domain on wiphy->regd so that does
3419 * not need to be remembered.
3421 static void restore_regulatory_settings(bool reset_user
, bool cached
)
3424 char world_alpha2
[2];
3425 struct reg_beacon
*reg_beacon
, *btmp
;
3426 LIST_HEAD(tmp_reg_req_list
);
3427 struct cfg80211_registered_device
*rdev
;
3432 * Clear the indoor setting in case that it is not controlled by user
3433 * space, as otherwise there is no guarantee that the device is still
3434 * operating in an indoor environment.
3436 spin_lock(®_indoor_lock
);
3437 if (reg_is_indoor
&& !reg_is_indoor_portid
) {
3438 reg_is_indoor
= false;
3439 reg_check_channels();
3441 spin_unlock(®_indoor_lock
);
3443 reset_regdomains(true, &world_regdom
);
3444 restore_alpha2(alpha2
, reset_user
);
3447 * If there's any pending requests we simply
3448 * stash them to a temporary pending queue and
3449 * add then after we've restored regulatory
3452 spin_lock(®_requests_lock
);
3453 list_splice_tail_init(®_requests_list
, &tmp_reg_req_list
);
3454 spin_unlock(®_requests_lock
);
3456 /* Clear beacon hints */
3457 spin_lock_bh(®_pending_beacons_lock
);
3458 list_for_each_entry_safe(reg_beacon
, btmp
, ®_pending_beacons
, list
) {
3459 list_del(®_beacon
->list
);
3462 spin_unlock_bh(®_pending_beacons_lock
);
3464 list_for_each_entry_safe(reg_beacon
, btmp
, ®_beacon_list
, list
) {
3465 list_del(®_beacon
->list
);
3469 /* First restore to the basic regulatory settings */
3470 world_alpha2
[0] = cfg80211_world_regdom
->alpha2
[0];
3471 world_alpha2
[1] = cfg80211_world_regdom
->alpha2
[1];
3473 list_for_each_entry(rdev
, &cfg80211_rdev_list
, list
) {
3474 if (rdev
->wiphy
.regulatory_flags
& REGULATORY_WIPHY_SELF_MANAGED
)
3476 if (rdev
->wiphy
.regulatory_flags
& REGULATORY_CUSTOM_REG
)
3477 restore_custom_reg_settings(&rdev
->wiphy
);
3480 if (cached
&& (!is_an_alpha2(alpha2
) ||
3481 !IS_ERR_OR_NULL(cfg80211_user_regdom
))) {
3482 reset_regdomains(false, cfg80211_world_regdom
);
3483 update_all_wiphy_regulatory(NL80211_REGDOM_SET_BY_CORE
);
3484 print_regdomain(get_cfg80211_regdom());
3485 nl80211_send_reg_change_event(&core_request_world
);
3486 reg_set_request_processed();
3488 if (is_an_alpha2(alpha2
) &&
3489 !regulatory_hint_user(alpha2
, NL80211_USER_REG_HINT_USER
)) {
3490 struct regulatory_request
*ureq
;
3492 spin_lock(®_requests_lock
);
3493 ureq
= list_last_entry(®_requests_list
,
3494 struct regulatory_request
,
3496 list_del(&ureq
->list
);
3497 spin_unlock(®_requests_lock
);
3499 notify_self_managed_wiphys(ureq
);
3500 reg_update_last_request(ureq
);
3501 set_regdom(reg_copy_regd(cfg80211_user_regdom
),
3502 REGD_SOURCE_CACHED
);
3505 regulatory_hint_core(world_alpha2
);
3508 * This restores the ieee80211_regdom module parameter
3509 * preference or the last user requested regulatory
3510 * settings, user regulatory settings takes precedence.
3512 if (is_an_alpha2(alpha2
))
3513 regulatory_hint_user(alpha2
, NL80211_USER_REG_HINT_USER
);
3516 spin_lock(®_requests_lock
);
3517 list_splice_tail_init(&tmp_reg_req_list
, ®_requests_list
);
3518 spin_unlock(®_requests_lock
);
3520 pr_debug("Kicking the queue\n");
3522 schedule_work(®_work
);
3525 static bool is_wiphy_all_set_reg_flag(enum ieee80211_regulatory_flags flag
)
3527 struct cfg80211_registered_device
*rdev
;
3528 struct wireless_dev
*wdev
;
3530 list_for_each_entry(rdev
, &cfg80211_rdev_list
, list
) {
3531 list_for_each_entry(wdev
, &rdev
->wiphy
.wdev_list
, list
) {
3533 if (!(wdev
->wiphy
->regulatory_flags
& flag
)) {
3544 void regulatory_hint_disconnect(void)
3546 /* Restore of regulatory settings is not required when wiphy(s)
3547 * ignore IE from connected access point but clearance of beacon hints
3548 * is required when wiphy(s) supports beacon hints.
3550 if (is_wiphy_all_set_reg_flag(REGULATORY_COUNTRY_IE_IGNORE
)) {
3551 struct reg_beacon
*reg_beacon
, *btmp
;
3553 if (is_wiphy_all_set_reg_flag(REGULATORY_DISABLE_BEACON_HINTS
))
3556 spin_lock_bh(®_pending_beacons_lock
);
3557 list_for_each_entry_safe(reg_beacon
, btmp
,
3558 ®_pending_beacons
, list
) {
3559 list_del(®_beacon
->list
);
3562 spin_unlock_bh(®_pending_beacons_lock
);
3564 list_for_each_entry_safe(reg_beacon
, btmp
,
3565 ®_beacon_list
, list
) {
3566 list_del(®_beacon
->list
);
3573 pr_debug("All devices are disconnected, going to restore regulatory settings\n");
3574 restore_regulatory_settings(false, true);
3577 static bool freq_is_chan_12_13_14(u32 freq
)
3579 if (freq
== ieee80211_channel_to_frequency(12, NL80211_BAND_2GHZ
) ||
3580 freq
== ieee80211_channel_to_frequency(13, NL80211_BAND_2GHZ
) ||
3581 freq
== ieee80211_channel_to_frequency(14, NL80211_BAND_2GHZ
))
3586 static bool pending_reg_beacon(struct ieee80211_channel
*beacon_chan
)
3588 struct reg_beacon
*pending_beacon
;
3590 list_for_each_entry(pending_beacon
, ®_pending_beacons
, list
)
3591 if (ieee80211_channel_equal(beacon_chan
,
3592 &pending_beacon
->chan
))
3597 int regulatory_hint_found_beacon(struct wiphy
*wiphy
,
3598 struct ieee80211_channel
*beacon_chan
,
3601 struct reg_beacon
*reg_beacon
;
3604 if (beacon_chan
->beacon_found
||
3605 beacon_chan
->flags
& IEEE80211_CHAN_RADAR
||
3606 (beacon_chan
->band
== NL80211_BAND_2GHZ
&&
3607 !freq_is_chan_12_13_14(beacon_chan
->center_freq
)))
3610 spin_lock_bh(®_pending_beacons_lock
);
3611 processing
= pending_reg_beacon(beacon_chan
);
3612 spin_unlock_bh(®_pending_beacons_lock
);
3617 reg_beacon
= kzalloc(sizeof(struct reg_beacon
), gfp
);
3621 pr_debug("Found new beacon on frequency: %d.%03d MHz (Ch %d) on %s\n",
3622 beacon_chan
->center_freq
, beacon_chan
->freq_offset
,
3623 ieee80211_freq_khz_to_channel(
3624 ieee80211_channel_to_khz(beacon_chan
)),
3627 memcpy(®_beacon
->chan
, beacon_chan
,
3628 sizeof(struct ieee80211_channel
));
3631 * Since we can be called from BH or and non-BH context
3632 * we must use spin_lock_bh()
3634 spin_lock_bh(®_pending_beacons_lock
);
3635 list_add_tail(®_beacon
->list
, ®_pending_beacons
);
3636 spin_unlock_bh(®_pending_beacons_lock
);
3638 schedule_work(®_work
);
3643 static void print_rd_rules(const struct ieee80211_regdomain
*rd
)
3646 const struct ieee80211_reg_rule
*reg_rule
= NULL
;
3647 const struct ieee80211_freq_range
*freq_range
= NULL
;
3648 const struct ieee80211_power_rule
*power_rule
= NULL
;
3649 char bw
[32], cac_time
[32];
3651 pr_debug(" (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp), (dfs_cac_time)\n");
3653 for (i
= 0; i
< rd
->n_reg_rules
; i
++) {
3654 reg_rule
= &rd
->reg_rules
[i
];
3655 freq_range
= ®_rule
->freq_range
;
3656 power_rule
= ®_rule
->power_rule
;
3658 if (reg_rule
->flags
& NL80211_RRF_AUTO_BW
)
3659 snprintf(bw
, sizeof(bw
), "%d KHz, %u KHz AUTO",
3660 freq_range
->max_bandwidth_khz
,
3661 reg_get_max_bandwidth(rd
, reg_rule
));
3663 snprintf(bw
, sizeof(bw
), "%d KHz",
3664 freq_range
->max_bandwidth_khz
);
3666 if (reg_rule
->flags
& NL80211_RRF_DFS
)
3667 scnprintf(cac_time
, sizeof(cac_time
), "%u s",
3668 reg_rule
->dfs_cac_ms
/1000);
3670 scnprintf(cac_time
, sizeof(cac_time
), "N/A");
3674 * There may not be documentation for max antenna gain
3675 * in certain regions
3677 if (power_rule
->max_antenna_gain
)
3678 pr_debug(" (%d KHz - %d KHz @ %s), (%d mBi, %d mBm), (%s)\n",
3679 freq_range
->start_freq_khz
,
3680 freq_range
->end_freq_khz
,
3682 power_rule
->max_antenna_gain
,
3683 power_rule
->max_eirp
,
3686 pr_debug(" (%d KHz - %d KHz @ %s), (N/A, %d mBm), (%s)\n",
3687 freq_range
->start_freq_khz
,
3688 freq_range
->end_freq_khz
,
3690 power_rule
->max_eirp
,
3695 bool reg_supported_dfs_region(enum nl80211_dfs_regions dfs_region
)
3697 switch (dfs_region
) {
3698 case NL80211_DFS_UNSET
:
3699 case NL80211_DFS_FCC
:
3700 case NL80211_DFS_ETSI
:
3701 case NL80211_DFS_JP
:
3704 pr_debug("Ignoring unknown DFS master region: %d\n", dfs_region
);
3709 static void print_regdomain(const struct ieee80211_regdomain
*rd
)
3711 struct regulatory_request
*lr
= get_last_request();
3713 if (is_intersected_alpha2(rd
->alpha2
)) {
3714 if (lr
->initiator
== NL80211_REGDOM_SET_BY_COUNTRY_IE
) {
3715 struct cfg80211_registered_device
*rdev
;
3716 rdev
= cfg80211_rdev_by_wiphy_idx(lr
->wiphy_idx
);
3718 pr_debug("Current regulatory domain updated by AP to: %c%c\n",
3719 rdev
->country_ie_alpha2
[0],
3720 rdev
->country_ie_alpha2
[1]);
3722 pr_debug("Current regulatory domain intersected:\n");
3724 pr_debug("Current regulatory domain intersected:\n");
3725 } else if (is_world_regdom(rd
->alpha2
)) {
3726 pr_debug("World regulatory domain updated:\n");
3728 if (is_unknown_alpha2(rd
->alpha2
))
3729 pr_debug("Regulatory domain changed to driver built-in settings (unknown country)\n");
3731 if (reg_request_cell_base(lr
))
3732 pr_debug("Regulatory domain changed to country: %c%c by Cell Station\n",
3733 rd
->alpha2
[0], rd
->alpha2
[1]);
3735 pr_debug("Regulatory domain changed to country: %c%c\n",
3736 rd
->alpha2
[0], rd
->alpha2
[1]);
3740 pr_debug(" DFS Master region: %s", reg_dfs_region_str(rd
->dfs_region
));
3744 static void print_regdomain_info(const struct ieee80211_regdomain
*rd
)
3746 pr_debug("Regulatory domain: %c%c\n", rd
->alpha2
[0], rd
->alpha2
[1]);
3750 static int reg_set_rd_core(const struct ieee80211_regdomain
*rd
)
3752 if (!is_world_regdom(rd
->alpha2
))
3754 update_world_regdomain(rd
);
3758 static int reg_set_rd_user(const struct ieee80211_regdomain
*rd
,
3759 struct regulatory_request
*user_request
)
3761 const struct ieee80211_regdomain
*intersected_rd
= NULL
;
3763 if (!regdom_changes(rd
->alpha2
))
3766 if (!is_valid_rd(rd
)) {
3767 pr_err("Invalid regulatory domain detected: %c%c\n",
3768 rd
->alpha2
[0], rd
->alpha2
[1]);
3769 print_regdomain_info(rd
);
3773 if (!user_request
->intersect
) {
3774 reset_regdomains(false, rd
);
3778 intersected_rd
= regdom_intersect(rd
, get_cfg80211_regdom());
3779 if (!intersected_rd
)
3784 reset_regdomains(false, intersected_rd
);
3789 static int reg_set_rd_driver(const struct ieee80211_regdomain
*rd
,
3790 struct regulatory_request
*driver_request
)
3792 const struct ieee80211_regdomain
*regd
;
3793 const struct ieee80211_regdomain
*intersected_rd
= NULL
;
3794 const struct ieee80211_regdomain
*tmp
;
3795 struct wiphy
*request_wiphy
;
3797 if (is_world_regdom(rd
->alpha2
))
3800 if (!regdom_changes(rd
->alpha2
))
3803 if (!is_valid_rd(rd
)) {
3804 pr_err("Invalid regulatory domain detected: %c%c\n",
3805 rd
->alpha2
[0], rd
->alpha2
[1]);
3806 print_regdomain_info(rd
);
3810 request_wiphy
= wiphy_idx_to_wiphy(driver_request
->wiphy_idx
);
3814 if (!driver_request
->intersect
) {
3816 wiphy_lock(request_wiphy
);
3817 if (request_wiphy
->regd
) {
3818 wiphy_unlock(request_wiphy
);
3822 regd
= reg_copy_regd(rd
);
3824 wiphy_unlock(request_wiphy
);
3825 return PTR_ERR(regd
);
3828 rcu_assign_pointer(request_wiphy
->regd
, regd
);
3829 wiphy_unlock(request_wiphy
);
3830 reset_regdomains(false, rd
);
3834 intersected_rd
= regdom_intersect(rd
, get_cfg80211_regdom());
3835 if (!intersected_rd
)
3839 * We can trash what CRDA provided now.
3840 * However if a driver requested this specific regulatory
3841 * domain we keep it for its private use
3843 tmp
= get_wiphy_regdom(request_wiphy
);
3844 rcu_assign_pointer(request_wiphy
->regd
, rd
);
3845 rcu_free_regdom(tmp
);
3849 reset_regdomains(false, intersected_rd
);
3854 static int reg_set_rd_country_ie(const struct ieee80211_regdomain
*rd
,
3855 struct regulatory_request
*country_ie_request
)
3857 struct wiphy
*request_wiphy
;
3859 if (!is_alpha2_set(rd
->alpha2
) && !is_an_alpha2(rd
->alpha2
) &&
3860 !is_unknown_alpha2(rd
->alpha2
))
3864 * Lets only bother proceeding on the same alpha2 if the current
3865 * rd is non static (it means CRDA was present and was used last)
3866 * and the pending request came in from a country IE
3869 if (!is_valid_rd(rd
)) {
3870 pr_err("Invalid regulatory domain detected: %c%c\n",
3871 rd
->alpha2
[0], rd
->alpha2
[1]);
3872 print_regdomain_info(rd
);
3876 request_wiphy
= wiphy_idx_to_wiphy(country_ie_request
->wiphy_idx
);
3880 if (country_ie_request
->intersect
)
3883 reset_regdomains(false, rd
);
3888 * Use this call to set the current regulatory domain. Conflicts with
3889 * multiple drivers can be ironed out later. Caller must've already
3890 * kmalloc'd the rd structure.
3892 int set_regdom(const struct ieee80211_regdomain
*rd
,
3893 enum ieee80211_regd_source regd_src
)
3895 struct regulatory_request
*lr
;
3896 bool user_reset
= false;
3899 if (IS_ERR_OR_NULL(rd
))
3902 if (!reg_is_valid_request(rd
->alpha2
)) {
3907 if (regd_src
== REGD_SOURCE_CRDA
)
3908 reset_crda_timeouts();
3910 lr
= get_last_request();
3912 /* Note that this doesn't update the wiphys, this is done below */
3913 switch (lr
->initiator
) {
3914 case NL80211_REGDOM_SET_BY_CORE
:
3915 r
= reg_set_rd_core(rd
);
3917 case NL80211_REGDOM_SET_BY_USER
:
3918 cfg80211_save_user_regdom(rd
);
3919 r
= reg_set_rd_user(rd
, lr
);
3922 case NL80211_REGDOM_SET_BY_DRIVER
:
3923 r
= reg_set_rd_driver(rd
, lr
);
3925 case NL80211_REGDOM_SET_BY_COUNTRY_IE
:
3926 r
= reg_set_rd_country_ie(rd
, lr
);
3929 WARN(1, "invalid initiator %d\n", lr
->initiator
);
3937 reg_set_request_processed();
3940 /* Back to world regulatory in case of errors */
3941 restore_regulatory_settings(user_reset
, false);
3948 /* This would make this whole thing pointless */
3949 if (WARN_ON(!lr
->intersect
&& rd
!= get_cfg80211_regdom()))
3952 /* update all wiphys now with the new established regulatory domain */
3953 update_all_wiphy_regulatory(lr
->initiator
);
3955 print_regdomain(get_cfg80211_regdom());
3957 nl80211_send_reg_change_event(lr
);
3959 reg_set_request_processed();
3964 static int __regulatory_set_wiphy_regd(struct wiphy
*wiphy
,
3965 struct ieee80211_regdomain
*rd
)
3967 const struct ieee80211_regdomain
*regd
;
3968 const struct ieee80211_regdomain
*prev_regd
;
3969 struct cfg80211_registered_device
*rdev
;
3971 if (WARN_ON(!wiphy
|| !rd
))
3974 if (WARN(!(wiphy
->regulatory_flags
& REGULATORY_WIPHY_SELF_MANAGED
),
3975 "wiphy should have REGULATORY_WIPHY_SELF_MANAGED\n"))
3978 if (WARN(!is_valid_rd(rd
),
3979 "Invalid regulatory domain detected: %c%c\n",
3980 rd
->alpha2
[0], rd
->alpha2
[1])) {
3981 print_regdomain_info(rd
);
3985 regd
= reg_copy_regd(rd
);
3987 return PTR_ERR(regd
);
3989 rdev
= wiphy_to_rdev(wiphy
);
3991 spin_lock(®_requests_lock
);
3992 prev_regd
= rdev
->requested_regd
;
3993 rdev
->requested_regd
= regd
;
3994 spin_unlock(®_requests_lock
);
4000 int regulatory_set_wiphy_regd(struct wiphy
*wiphy
,
4001 struct ieee80211_regdomain
*rd
)
4003 int ret
= __regulatory_set_wiphy_regd(wiphy
, rd
);
4008 schedule_work(®_work
);
4011 EXPORT_SYMBOL(regulatory_set_wiphy_regd
);
4013 int regulatory_set_wiphy_regd_sync(struct wiphy
*wiphy
,
4014 struct ieee80211_regdomain
*rd
)
4020 ret
= __regulatory_set_wiphy_regd(wiphy
, rd
);
4024 /* process the request immediately */
4025 reg_process_self_managed_hint(wiphy
);
4026 reg_check_channels();
4029 EXPORT_SYMBOL(regulatory_set_wiphy_regd_sync
);
4031 void wiphy_regulatory_register(struct wiphy
*wiphy
)
4033 struct regulatory_request
*lr
= get_last_request();
4035 /* self-managed devices ignore beacon hints and country IE */
4036 if (wiphy
->regulatory_flags
& REGULATORY_WIPHY_SELF_MANAGED
) {
4037 wiphy
->regulatory_flags
|= REGULATORY_DISABLE_BEACON_HINTS
|
4038 REGULATORY_COUNTRY_IE_IGNORE
;
4041 * The last request may have been received before this
4042 * registration call. Call the driver notifier if
4043 * initiator is USER.
4045 if (lr
->initiator
== NL80211_REGDOM_SET_BY_USER
)
4046 reg_call_notifier(wiphy
, lr
);
4049 if (!reg_dev_ignore_cell_hint(wiphy
))
4050 reg_num_devs_support_basehint
++;
4052 wiphy_update_regulatory(wiphy
, lr
->initiator
);
4053 wiphy_all_share_dfs_chan_state(wiphy
);
4054 reg_process_self_managed_hints();
4057 void wiphy_regulatory_deregister(struct wiphy
*wiphy
)
4059 struct wiphy
*request_wiphy
= NULL
;
4060 struct regulatory_request
*lr
;
4062 lr
= get_last_request();
4064 if (!reg_dev_ignore_cell_hint(wiphy
))
4065 reg_num_devs_support_basehint
--;
4067 rcu_free_regdom(get_wiphy_regdom(wiphy
));
4068 RCU_INIT_POINTER(wiphy
->regd
, NULL
);
4071 request_wiphy
= wiphy_idx_to_wiphy(lr
->wiphy_idx
);
4073 if (!request_wiphy
|| request_wiphy
!= wiphy
)
4076 lr
->wiphy_idx
= WIPHY_IDX_INVALID
;
4077 lr
->country_ie_env
= ENVIRON_ANY
;
4081 * See FCC notices for UNII band definitions
4082 * 5GHz: https://www.fcc.gov/document/5-ghz-unlicensed-spectrum-unii
4083 * 6GHz: https://www.fcc.gov/document/fcc-proposes-more-spectrum-unlicensed-use-0
4085 int cfg80211_get_unii(int freq
)
4088 if (freq
>= 5150 && freq
<= 5250)
4092 if (freq
> 5250 && freq
<= 5350)
4096 if (freq
> 5350 && freq
<= 5470)
4100 if (freq
> 5470 && freq
<= 5725)
4104 if (freq
> 5725 && freq
<= 5825)
4108 if (freq
> 5925 && freq
<= 6425)
4112 if (freq
> 6425 && freq
<= 6525)
4116 if (freq
> 6525 && freq
<= 6875)
4120 if (freq
> 6875 && freq
<= 7125)
4126 bool regulatory_indoor_allowed(void)
4128 return reg_is_indoor
;
4131 bool regulatory_pre_cac_allowed(struct wiphy
*wiphy
)
4133 const struct ieee80211_regdomain
*regd
= NULL
;
4134 const struct ieee80211_regdomain
*wiphy_regd
= NULL
;
4135 bool pre_cac_allowed
= false;
4139 regd
= rcu_dereference(cfg80211_regdomain
);
4140 wiphy_regd
= rcu_dereference(wiphy
->regd
);
4142 if (regd
->dfs_region
== NL80211_DFS_ETSI
)
4143 pre_cac_allowed
= true;
4147 return pre_cac_allowed
;
4150 if (regd
->dfs_region
== wiphy_regd
->dfs_region
&&
4151 wiphy_regd
->dfs_region
== NL80211_DFS_ETSI
)
4152 pre_cac_allowed
= true;
4156 return pre_cac_allowed
;
4158 EXPORT_SYMBOL(regulatory_pre_cac_allowed
);
4160 static void cfg80211_check_and_end_cac(struct cfg80211_registered_device
*rdev
)
4162 struct wireless_dev
*wdev
;
4163 /* If we finished CAC or received radar, we should end any
4164 * CAC running on the same channels.
4165 * the check !cfg80211_chandef_dfs_usable contain 2 options:
4166 * either all channels are available - those the CAC_FINISHED
4167 * event has effected another wdev state, or there is a channel
4168 * in unavailable state in wdev chandef - those the RADAR_DETECTED
4169 * event has effected another wdev state.
4170 * In both cases we should end the CAC on the wdev.
4172 list_for_each_entry(wdev
, &rdev
->wiphy
.wdev_list
, list
) {
4173 if (wdev
->cac_started
&&
4174 !cfg80211_chandef_dfs_usable(&rdev
->wiphy
, &wdev
->chandef
))
4175 rdev_end_cac(rdev
, wdev
->netdev
);
4179 void regulatory_propagate_dfs_state(struct wiphy
*wiphy
,
4180 struct cfg80211_chan_def
*chandef
,
4181 enum nl80211_dfs_state dfs_state
,
4182 enum nl80211_radar_event event
)
4184 struct cfg80211_registered_device
*rdev
;
4188 if (WARN_ON(!cfg80211_chandef_valid(chandef
)))
4191 list_for_each_entry(rdev
, &cfg80211_rdev_list
, list
) {
4192 if (wiphy
== &rdev
->wiphy
)
4195 if (!reg_dfs_domain_same(wiphy
, &rdev
->wiphy
))
4198 if (!ieee80211_get_channel(&rdev
->wiphy
,
4199 chandef
->chan
->center_freq
))
4202 cfg80211_set_dfs_state(&rdev
->wiphy
, chandef
, dfs_state
);
4204 if (event
== NL80211_RADAR_DETECTED
||
4205 event
== NL80211_RADAR_CAC_FINISHED
) {
4206 cfg80211_sched_dfs_chan_update(rdev
);
4207 cfg80211_check_and_end_cac(rdev
);
4210 nl80211_radar_notify(rdev
, chandef
, event
, NULL
, GFP_KERNEL
);
4214 static int __init
regulatory_init_db(void)
4219 * It's possible that - due to other bugs/issues - cfg80211
4220 * never called regulatory_init() below, or that it failed;
4221 * in that case, don't try to do any further work here as
4222 * it's doomed to lead to crashes.
4224 if (IS_ERR_OR_NULL(reg_pdev
))
4227 err
= load_builtin_regdb_keys();
4231 /* We always try to get an update for the static regdomain */
4232 err
= regulatory_hint_core(cfg80211_world_regdom
->alpha2
);
4234 if (err
== -ENOMEM
) {
4235 platform_device_unregister(reg_pdev
);
4239 * N.B. kobject_uevent_env() can fail mainly for when we're out
4240 * memory which is handled and propagated appropriately above
4241 * but it can also fail during a netlink_broadcast() or during
4242 * early boot for call_usermodehelper(). For now treat these
4243 * errors as non-fatal.
4245 pr_err("kobject_uevent_env() was unable to call CRDA during init\n");
4249 * Finally, if the user set the module parameter treat it
4252 if (!is_world_regdom(ieee80211_regdom
))
4253 regulatory_hint_user(ieee80211_regdom
,
4254 NL80211_USER_REG_HINT_USER
);
4259 late_initcall(regulatory_init_db
);
4262 int __init
regulatory_init(void)
4264 reg_pdev
= platform_device_register_simple("regulatory", 0, NULL
, 0);
4265 if (IS_ERR(reg_pdev
))
4266 return PTR_ERR(reg_pdev
);
4268 rcu_assign_pointer(cfg80211_regdomain
, cfg80211_world_regdom
);
4270 user_alpha2
[0] = '9';
4271 user_alpha2
[1] = '7';
4274 return regulatory_init_db();
4280 void regulatory_exit(void)
4282 struct regulatory_request
*reg_request
, *tmp
;
4283 struct reg_beacon
*reg_beacon
, *btmp
;
4285 cancel_work_sync(®_work
);
4286 cancel_crda_timeout_sync();
4287 cancel_delayed_work_sync(®_check_chans
);
4289 /* Lock to suppress warnings */
4291 reset_regdomains(true, NULL
);
4294 dev_set_uevent_suppress(®_pdev
->dev
, true);
4296 platform_device_unregister(reg_pdev
);
4298 list_for_each_entry_safe(reg_beacon
, btmp
, ®_pending_beacons
, list
) {
4299 list_del(®_beacon
->list
);
4303 list_for_each_entry_safe(reg_beacon
, btmp
, ®_beacon_list
, list
) {
4304 list_del(®_beacon
->list
);
4308 list_for_each_entry_safe(reg_request
, tmp
, ®_requests_list
, list
) {
4309 list_del(®_request
->list
);
4313 if (!IS_ERR_OR_NULL(regdb
))
4315 if (!IS_ERR_OR_NULL(cfg80211_user_regdom
))
4316 kfree(cfg80211_user_regdom
);
4318 free_regdb_keyring();