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 Intel Corporation
10 * Permission to use, copy, modify, and/or distribute this software for any
11 * purpose with or without fee is hereby granted, provided that the above
12 * copyright notice and this permission notice appear in all copies.
14 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
15 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
16 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
17 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
18 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
19 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
20 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
25 * DOC: Wireless regulatory infrastructure
27 * The usual implementation is for a driver to read a device EEPROM to
28 * determine which regulatory domain it should be operating under, then
29 * looking up the allowable channels in a driver-local table and finally
30 * registering those channels in the wiphy structure.
32 * Another set of compliance enforcement is for drivers to use their
33 * own compliance limits which can be stored on the EEPROM. The host
34 * driver or firmware may ensure these are used.
36 * In addition to all this we provide an extra layer of regulatory
37 * conformance. For drivers which do not have any regulatory
38 * information CRDA provides the complete regulatory solution.
39 * For others it provides a community effort on further restrictions
40 * to enhance compliance.
42 * Note: When number of rules --> infinity we will not be able to
43 * index on alpha2 any more, instead we'll probably have to
44 * rely on some SHA1 checksum of the regdomain for example.
48 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
50 #include <linux/kernel.h>
51 #include <linux/export.h>
52 #include <linux/slab.h>
53 #include <linux/list.h>
54 #include <linux/ctype.h>
55 #include <linux/nl80211.h>
56 #include <linux/platform_device.h>
57 #include <linux/verification.h>
58 #include <linux/moduleparam.h>
59 #include <linux/firmware.h>
60 #include <net/cfg80211.h>
67 * Grace period we give before making sure all current interfaces reside on
68 * channels allowed by the current regulatory domain.
70 #define REG_ENFORCE_GRACE_MS 60000
73 * enum reg_request_treatment - regulatory request treatment
75 * @REG_REQ_OK: continue processing the regulatory request
76 * @REG_REQ_IGNORE: ignore the regulatory request
77 * @REG_REQ_INTERSECT: the regulatory domain resulting from this request should
78 * be intersected with the current one.
79 * @REG_REQ_ALREADY_SET: the regulatory request will not change the current
80 * regulatory settings, and no further processing is required.
82 enum reg_request_treatment
{
89 static struct regulatory_request core_request_world
= {
90 .initiator
= NL80211_REGDOM_SET_BY_CORE
,
95 .country_ie_env
= ENVIRON_ANY
,
99 * Receipt of information from last regulatory request,
100 * protected by RTNL (and can be accessed with RCU protection)
102 static struct regulatory_request __rcu
*last_request
=
103 (void __force __rcu
*)&core_request_world
;
105 /* To trigger userspace events and load firmware */
106 static struct platform_device
*reg_pdev
;
109 * Central wireless core regulatory domains, we only need two,
110 * the current one and a world regulatory domain in case we have no
111 * information to give us an alpha2.
112 * (protected by RTNL, can be read under RCU)
114 const struct ieee80211_regdomain __rcu
*cfg80211_regdomain
;
117 * Number of devices that registered to the core
118 * that support cellular base station regulatory hints
119 * (protected by RTNL)
121 static int reg_num_devs_support_basehint
;
124 * State variable indicating if the platform on which the devices
125 * are attached is operating in an indoor environment. The state variable
126 * is relevant for all registered devices.
128 static bool reg_is_indoor
;
129 static spinlock_t reg_indoor_lock
;
131 /* Used to track the userspace process controlling the indoor setting */
132 static u32 reg_is_indoor_portid
;
134 static void restore_regulatory_settings(bool reset_user
);
136 static const struct ieee80211_regdomain
*get_cfg80211_regdom(void)
138 return rcu_dereference_rtnl(cfg80211_regdomain
);
141 const struct ieee80211_regdomain
*get_wiphy_regdom(struct wiphy
*wiphy
)
143 return rcu_dereference_rtnl(wiphy
->regd
);
146 static const char *reg_dfs_region_str(enum nl80211_dfs_regions dfs_region
)
148 switch (dfs_region
) {
149 case NL80211_DFS_UNSET
:
151 case NL80211_DFS_FCC
:
153 case NL80211_DFS_ETSI
:
161 enum nl80211_dfs_regions
reg_get_dfs_region(struct wiphy
*wiphy
)
163 const struct ieee80211_regdomain
*regd
= NULL
;
164 const struct ieee80211_regdomain
*wiphy_regd
= NULL
;
166 regd
= get_cfg80211_regdom();
170 wiphy_regd
= get_wiphy_regdom(wiphy
);
174 if (wiphy_regd
->dfs_region
== regd
->dfs_region
)
177 pr_debug("%s: device specific dfs_region (%s) disagrees with cfg80211's central dfs_region (%s)\n",
178 dev_name(&wiphy
->dev
),
179 reg_dfs_region_str(wiphy_regd
->dfs_region
),
180 reg_dfs_region_str(regd
->dfs_region
));
183 return regd
->dfs_region
;
186 static void rcu_free_regdom(const struct ieee80211_regdomain
*r
)
190 kfree_rcu((struct ieee80211_regdomain
*)r
, rcu_head
);
193 static struct regulatory_request
*get_last_request(void)
195 return rcu_dereference_rtnl(last_request
);
198 /* Used to queue up regulatory hints */
199 static LIST_HEAD(reg_requests_list
);
200 static spinlock_t reg_requests_lock
;
202 /* Used to queue up beacon hints for review */
203 static LIST_HEAD(reg_pending_beacons
);
204 static spinlock_t reg_pending_beacons_lock
;
206 /* Used to keep track of processed beacon hints */
207 static LIST_HEAD(reg_beacon_list
);
210 struct list_head list
;
211 struct ieee80211_channel chan
;
214 static void reg_check_chans_work(struct work_struct
*work
);
215 static DECLARE_DELAYED_WORK(reg_check_chans
, reg_check_chans_work
);
217 static void reg_todo(struct work_struct
*work
);
218 static DECLARE_WORK(reg_work
, reg_todo
);
220 /* We keep a static world regulatory domain in case of the absence of CRDA */
221 static const struct ieee80211_regdomain world_regdom
= {
225 /* IEEE 802.11b/g, channels 1..11 */
226 REG_RULE(2412-10, 2462+10, 40, 6, 20, 0),
227 /* IEEE 802.11b/g, channels 12..13. */
228 REG_RULE(2467-10, 2472+10, 20, 6, 20,
229 NL80211_RRF_NO_IR
| NL80211_RRF_AUTO_BW
),
230 /* IEEE 802.11 channel 14 - Only JP enables
231 * this and for 802.11b only */
232 REG_RULE(2484-10, 2484+10, 20, 6, 20,
234 NL80211_RRF_NO_OFDM
),
235 /* IEEE 802.11a, channel 36..48 */
236 REG_RULE(5180-10, 5240+10, 80, 6, 20,
238 NL80211_RRF_AUTO_BW
),
240 /* IEEE 802.11a, channel 52..64 - DFS required */
241 REG_RULE(5260-10, 5320+10, 80, 6, 20,
243 NL80211_RRF_AUTO_BW
|
246 /* IEEE 802.11a, channel 100..144 - DFS required */
247 REG_RULE(5500-10, 5720+10, 160, 6, 20,
251 /* IEEE 802.11a, channel 149..165 */
252 REG_RULE(5745-10, 5825+10, 80, 6, 20,
255 /* IEEE 802.11ad (60GHz), channels 1..3 */
256 REG_RULE(56160+2160*1-1080, 56160+2160*3+1080, 2160, 0, 0, 0),
260 /* protected by RTNL */
261 static const struct ieee80211_regdomain
*cfg80211_world_regdom
=
264 static char *ieee80211_regdom
= "00";
265 static char user_alpha2
[2];
267 module_param(ieee80211_regdom
, charp
, 0444);
268 MODULE_PARM_DESC(ieee80211_regdom
, "IEEE 802.11 regulatory domain code");
270 static void reg_free_request(struct regulatory_request
*request
)
272 if (request
== &core_request_world
)
275 if (request
!= get_last_request())
279 static void reg_free_last_request(void)
281 struct regulatory_request
*lr
= get_last_request();
283 if (lr
!= &core_request_world
&& lr
)
284 kfree_rcu(lr
, rcu_head
);
287 static void reg_update_last_request(struct regulatory_request
*request
)
289 struct regulatory_request
*lr
;
291 lr
= get_last_request();
295 reg_free_last_request();
296 rcu_assign_pointer(last_request
, request
);
299 static void reset_regdomains(bool full_reset
,
300 const struct ieee80211_regdomain
*new_regdom
)
302 const struct ieee80211_regdomain
*r
;
306 r
= get_cfg80211_regdom();
308 /* avoid freeing static information or freeing something twice */
309 if (r
== cfg80211_world_regdom
)
311 if (cfg80211_world_regdom
== &world_regdom
)
312 cfg80211_world_regdom
= NULL
;
313 if (r
== &world_regdom
)
317 rcu_free_regdom(cfg80211_world_regdom
);
319 cfg80211_world_regdom
= &world_regdom
;
320 rcu_assign_pointer(cfg80211_regdomain
, new_regdom
);
325 reg_update_last_request(&core_request_world
);
329 * Dynamic world regulatory domain requested by the wireless
330 * core upon initialization
332 static void update_world_regdomain(const struct ieee80211_regdomain
*rd
)
334 struct regulatory_request
*lr
;
336 lr
= get_last_request();
340 reset_regdomains(false, rd
);
342 cfg80211_world_regdom
= rd
;
345 bool is_world_regdom(const char *alpha2
)
349 return alpha2
[0] == '0' && alpha2
[1] == '0';
352 static bool is_alpha2_set(const char *alpha2
)
356 return alpha2
[0] && alpha2
[1];
359 static bool is_unknown_alpha2(const char *alpha2
)
364 * Special case where regulatory domain was built by driver
365 * but a specific alpha2 cannot be determined
367 return alpha2
[0] == '9' && alpha2
[1] == '9';
370 static bool is_intersected_alpha2(const char *alpha2
)
375 * Special case where regulatory domain is the
376 * result of an intersection between two regulatory domain
379 return alpha2
[0] == '9' && alpha2
[1] == '8';
382 static bool is_an_alpha2(const char *alpha2
)
386 return isalpha(alpha2
[0]) && isalpha(alpha2
[1]);
389 static bool alpha2_equal(const char *alpha2_x
, const char *alpha2_y
)
391 if (!alpha2_x
|| !alpha2_y
)
393 return alpha2_x
[0] == alpha2_y
[0] && alpha2_x
[1] == alpha2_y
[1];
396 static bool regdom_changes(const char *alpha2
)
398 const struct ieee80211_regdomain
*r
= get_cfg80211_regdom();
402 return !alpha2_equal(r
->alpha2
, alpha2
);
406 * The NL80211_REGDOM_SET_BY_USER regdom alpha2 is cached, this lets
407 * you know if a valid regulatory hint with NL80211_REGDOM_SET_BY_USER
408 * has ever been issued.
410 static bool is_user_regdom_saved(void)
412 if (user_alpha2
[0] == '9' && user_alpha2
[1] == '7')
415 /* This would indicate a mistake on the design */
416 if (WARN(!is_world_regdom(user_alpha2
) && !is_an_alpha2(user_alpha2
),
417 "Unexpected user alpha2: %c%c\n",
418 user_alpha2
[0], user_alpha2
[1]))
424 static const struct ieee80211_regdomain
*
425 reg_copy_regd(const struct ieee80211_regdomain
*src_regd
)
427 struct ieee80211_regdomain
*regd
;
432 sizeof(struct ieee80211_regdomain
) +
433 src_regd
->n_reg_rules
* sizeof(struct ieee80211_reg_rule
);
435 regd
= kzalloc(size_of_regd
, GFP_KERNEL
);
437 return ERR_PTR(-ENOMEM
);
439 memcpy(regd
, src_regd
, sizeof(struct ieee80211_regdomain
));
441 for (i
= 0; i
< src_regd
->n_reg_rules
; i
++)
442 memcpy(®d
->reg_rules
[i
], &src_regd
->reg_rules
[i
],
443 sizeof(struct ieee80211_reg_rule
));
448 struct reg_regdb_apply_request
{
449 struct list_head list
;
450 const struct ieee80211_regdomain
*regdom
;
453 static LIST_HEAD(reg_regdb_apply_list
);
454 static DEFINE_MUTEX(reg_regdb_apply_mutex
);
456 static void reg_regdb_apply(struct work_struct
*work
)
458 struct reg_regdb_apply_request
*request
;
462 mutex_lock(®_regdb_apply_mutex
);
463 while (!list_empty(®_regdb_apply_list
)) {
464 request
= list_first_entry(®_regdb_apply_list
,
465 struct reg_regdb_apply_request
,
467 list_del(&request
->list
);
469 set_regdom(request
->regdom
, REGD_SOURCE_INTERNAL_DB
);
472 mutex_unlock(®_regdb_apply_mutex
);
477 static DECLARE_WORK(reg_regdb_work
, reg_regdb_apply
);
479 static int reg_schedule_apply(const struct ieee80211_regdomain
*regdom
)
481 struct reg_regdb_apply_request
*request
;
483 request
= kzalloc(sizeof(struct reg_regdb_apply_request
), GFP_KERNEL
);
489 request
->regdom
= regdom
;
491 mutex_lock(®_regdb_apply_mutex
);
492 list_add_tail(&request
->list
, ®_regdb_apply_list
);
493 mutex_unlock(®_regdb_apply_mutex
);
495 schedule_work(®_regdb_work
);
499 #ifdef CONFIG_CFG80211_CRDA_SUPPORT
500 /* Max number of consecutive attempts to communicate with CRDA */
501 #define REG_MAX_CRDA_TIMEOUTS 10
503 static u32 reg_crda_timeouts
;
505 static void crda_timeout_work(struct work_struct
*work
);
506 static DECLARE_DELAYED_WORK(crda_timeout
, crda_timeout_work
);
508 static void crda_timeout_work(struct work_struct
*work
)
510 pr_debug("Timeout while waiting for CRDA to reply, restoring regulatory settings\n");
513 restore_regulatory_settings(true);
517 static void cancel_crda_timeout(void)
519 cancel_delayed_work(&crda_timeout
);
522 static void cancel_crda_timeout_sync(void)
524 cancel_delayed_work_sync(&crda_timeout
);
527 static void reset_crda_timeouts(void)
529 reg_crda_timeouts
= 0;
533 * This lets us keep regulatory code which is updated on a regulatory
534 * basis in userspace.
536 static int call_crda(const char *alpha2
)
539 char *env
[] = { country
, NULL
};
542 snprintf(country
, sizeof(country
), "COUNTRY=%c%c",
543 alpha2
[0], alpha2
[1]);
545 if (reg_crda_timeouts
> REG_MAX_CRDA_TIMEOUTS
) {
546 pr_debug("Exceeded CRDA call max attempts. Not calling CRDA\n");
550 if (!is_world_regdom((char *) alpha2
))
551 pr_debug("Calling CRDA for country: %c%c\n",
552 alpha2
[0], alpha2
[1]);
554 pr_debug("Calling CRDA to update world regulatory domain\n");
556 ret
= kobject_uevent_env(®_pdev
->dev
.kobj
, KOBJ_CHANGE
, env
);
560 queue_delayed_work(system_power_efficient_wq
,
561 &crda_timeout
, msecs_to_jiffies(3142));
565 static inline void cancel_crda_timeout(void) {}
566 static inline void cancel_crda_timeout_sync(void) {}
567 static inline void reset_crda_timeouts(void) {}
568 static inline int call_crda(const char *alpha2
)
572 #endif /* CONFIG_CFG80211_CRDA_SUPPORT */
574 /* code to directly load a firmware database through request_firmware */
575 static const struct fwdb_header
*regdb
;
577 struct fwdb_country
{
580 /* this struct cannot be extended */
581 } __packed
__aligned(4);
583 struct fwdb_collection
{
587 /* no optional data yet */
588 /* aligned to 2, then followed by __be16 array of rule pointers */
589 } __packed
__aligned(4);
592 FWDB_FLAG_NO_OFDM
= BIT(0),
593 FWDB_FLAG_NO_OUTDOOR
= BIT(1),
594 FWDB_FLAG_DFS
= BIT(2),
595 FWDB_FLAG_NO_IR
= BIT(3),
596 FWDB_FLAG_AUTO_BW
= BIT(4),
605 struct fwdb_wmm_rule
{
606 struct fwdb_wmm_ac client
[IEEE80211_NUM_ACS
];
607 struct fwdb_wmm_ac ap
[IEEE80211_NUM_ACS
];
614 __be32 start
, end
, max_bw
;
615 /* start of optional data */
618 } __packed
__aligned(4);
620 #define FWDB_MAGIC 0x52474442
621 #define FWDB_VERSION 20
626 struct fwdb_country country
[];
627 } __packed
__aligned(4);
629 static int ecw2cw(int ecw
)
631 return (1 << ecw
) - 1;
634 static bool valid_wmm(struct fwdb_wmm_rule
*rule
)
636 struct fwdb_wmm_ac
*ac
= (struct fwdb_wmm_ac
*)rule
;
639 for (i
= 0; i
< IEEE80211_NUM_ACS
* 2; i
++) {
640 u16 cw_min
= ecw2cw((ac
[i
].ecw
& 0xf0) >> 4);
641 u16 cw_max
= ecw2cw(ac
[i
].ecw
& 0x0f);
642 u8 aifsn
= ac
[i
].aifsn
;
644 if (cw_min
>= cw_max
)
654 static bool valid_rule(const u8
*data
, unsigned int size
, u16 rule_ptr
)
656 struct fwdb_rule
*rule
= (void *)(data
+ (rule_ptr
<< 2));
658 if ((u8
*)rule
+ sizeof(rule
->len
) > data
+ size
)
661 /* mandatory fields */
662 if (rule
->len
< offsetofend(struct fwdb_rule
, max_bw
))
664 if (rule
->len
>= offsetofend(struct fwdb_rule
, wmm_ptr
)) {
665 u32 wmm_ptr
= be16_to_cpu(rule
->wmm_ptr
) << 2;
666 struct fwdb_wmm_rule
*wmm
;
668 if (wmm_ptr
+ sizeof(struct fwdb_wmm_rule
) > size
)
671 wmm
= (void *)(data
+ wmm_ptr
);
679 static bool valid_country(const u8
*data
, unsigned int size
,
680 const struct fwdb_country
*country
)
682 unsigned int ptr
= be16_to_cpu(country
->coll_ptr
) << 2;
683 struct fwdb_collection
*coll
= (void *)(data
+ ptr
);
687 /* make sure we can read len/n_rules */
688 if ((u8
*)coll
+ offsetofend(typeof(*coll
), n_rules
) > data
+ size
)
691 /* make sure base struct and all rules fit */
692 if ((u8
*)coll
+ ALIGN(coll
->len
, 2) +
693 (coll
->n_rules
* 2) > data
+ size
)
696 /* mandatory fields must exist */
697 if (coll
->len
< offsetofend(struct fwdb_collection
, dfs_region
))
700 rules_ptr
= (void *)((u8
*)coll
+ ALIGN(coll
->len
, 2));
702 for (i
= 0; i
< coll
->n_rules
; i
++) {
703 u16 rule_ptr
= be16_to_cpu(rules_ptr
[i
]);
705 if (!valid_rule(data
, size
, rule_ptr
))
712 #ifdef CONFIG_CFG80211_REQUIRE_SIGNED_REGDB
713 static struct key
*builtin_regdb_keys
;
715 static void __init
load_keys_from_buffer(const u8
*p
, unsigned int buflen
)
717 const u8
*end
= p
+ buflen
;
722 /* Each cert begins with an ASN.1 SEQUENCE tag and must be more
723 * than 256 bytes in size.
730 plen
= (p
[2] << 8) | p
[3];
735 key
= key_create_or_update(make_key_ref(builtin_regdb_keys
, 1),
736 "asymmetric", NULL
, p
, plen
,
737 ((KEY_POS_ALL
& ~KEY_POS_SETATTR
) |
738 KEY_USR_VIEW
| KEY_USR_READ
),
739 KEY_ALLOC_NOT_IN_QUOTA
|
741 KEY_ALLOC_BYPASS_RESTRICTION
);
743 pr_err("Problem loading in-kernel X.509 certificate (%ld)\n",
746 pr_notice("Loaded X.509 cert '%s'\n",
747 key_ref_to_ptr(key
)->description
);
756 pr_err("Problem parsing in-kernel X.509 certificate list\n");
759 static int __init
load_builtin_regdb_keys(void)
762 keyring_alloc(".builtin_regdb_keys",
763 KUIDT_INIT(0), KGIDT_INIT(0), current_cred(),
764 ((KEY_POS_ALL
& ~KEY_POS_SETATTR
) |
765 KEY_USR_VIEW
| KEY_USR_READ
| KEY_USR_SEARCH
),
766 KEY_ALLOC_NOT_IN_QUOTA
, NULL
, NULL
);
767 if (IS_ERR(builtin_regdb_keys
))
768 return PTR_ERR(builtin_regdb_keys
);
770 pr_notice("Loading compiled-in X.509 certificates for regulatory database\n");
772 #ifdef CONFIG_CFG80211_USE_KERNEL_REGDB_KEYS
773 load_keys_from_buffer(shipped_regdb_certs
, shipped_regdb_certs_len
);
775 #ifdef CONFIG_CFG80211_EXTRA_REGDB_KEYDIR
776 if (CONFIG_CFG80211_EXTRA_REGDB_KEYDIR
[0] != '\0')
777 load_keys_from_buffer(extra_regdb_certs
, extra_regdb_certs_len
);
783 static bool regdb_has_valid_signature(const u8
*data
, unsigned int size
)
785 const struct firmware
*sig
;
788 if (request_firmware(&sig
, "regulatory.db.p7s", ®_pdev
->dev
))
791 result
= verify_pkcs7_signature(data
, size
, sig
->data
, sig
->size
,
793 VERIFYING_UNSPECIFIED_SIGNATURE
,
796 release_firmware(sig
);
801 static void free_regdb_keyring(void)
803 key_put(builtin_regdb_keys
);
806 static int load_builtin_regdb_keys(void)
811 static bool regdb_has_valid_signature(const u8
*data
, unsigned int size
)
816 static void free_regdb_keyring(void)
819 #endif /* CONFIG_CFG80211_REQUIRE_SIGNED_REGDB */
821 static bool valid_regdb(const u8
*data
, unsigned int size
)
823 const struct fwdb_header
*hdr
= (void *)data
;
824 const struct fwdb_country
*country
;
826 if (size
< sizeof(*hdr
))
829 if (hdr
->magic
!= cpu_to_be32(FWDB_MAGIC
))
832 if (hdr
->version
!= cpu_to_be32(FWDB_VERSION
))
835 if (!regdb_has_valid_signature(data
, size
))
838 country
= &hdr
->country
[0];
839 while ((u8
*)(country
+ 1) <= data
+ size
) {
840 if (!country
->coll_ptr
)
842 if (!valid_country(data
, size
, country
))
850 static void set_wmm_rule(struct ieee80211_reg_rule
*rrule
,
851 struct fwdb_wmm_rule
*wmm
)
853 struct ieee80211_wmm_rule
*rule
= &rrule
->wmm_rule
;
856 for (i
= 0; i
< IEEE80211_NUM_ACS
; i
++) {
857 rule
->client
[i
].cw_min
=
858 ecw2cw((wmm
->client
[i
].ecw
& 0xf0) >> 4);
859 rule
->client
[i
].cw_max
= ecw2cw(wmm
->client
[i
].ecw
& 0x0f);
860 rule
->client
[i
].aifsn
= wmm
->client
[i
].aifsn
;
861 rule
->client
[i
].cot
= 1000 * be16_to_cpu(wmm
->client
[i
].cot
);
862 rule
->ap
[i
].cw_min
= ecw2cw((wmm
->ap
[i
].ecw
& 0xf0) >> 4);
863 rule
->ap
[i
].cw_max
= ecw2cw(wmm
->ap
[i
].ecw
& 0x0f);
864 rule
->ap
[i
].aifsn
= wmm
->ap
[i
].aifsn
;
865 rule
->ap
[i
].cot
= 1000 * be16_to_cpu(wmm
->ap
[i
].cot
);
868 rrule
->has_wmm
= true;
871 static int __regdb_query_wmm(const struct fwdb_header
*db
,
872 const struct fwdb_country
*country
, int freq
,
873 struct ieee80211_reg_rule
*rule
)
875 unsigned int ptr
= be16_to_cpu(country
->coll_ptr
) << 2;
876 struct fwdb_collection
*coll
= (void *)((u8
*)db
+ ptr
);
879 for (i
= 0; i
< coll
->n_rules
; i
++) {
880 __be16
*rules_ptr
= (void *)((u8
*)coll
+ ALIGN(coll
->len
, 2));
881 unsigned int rule_ptr
= be16_to_cpu(rules_ptr
[i
]) << 2;
882 struct fwdb_rule
*rrule
= (void *)((u8
*)db
+ rule_ptr
);
883 struct fwdb_wmm_rule
*wmm
;
884 unsigned int wmm_ptr
;
886 if (rrule
->len
< offsetofend(struct fwdb_rule
, wmm_ptr
))
889 if (freq
>= KHZ_TO_MHZ(be32_to_cpu(rrule
->start
)) &&
890 freq
<= KHZ_TO_MHZ(be32_to_cpu(rrule
->end
))) {
891 wmm_ptr
= be16_to_cpu(rrule
->wmm_ptr
) << 2;
892 wmm
= (void *)((u8
*)db
+ wmm_ptr
);
893 set_wmm_rule(rule
, wmm
);
901 int reg_query_regdb_wmm(char *alpha2
, int freq
, struct ieee80211_reg_rule
*rule
)
903 const struct fwdb_header
*hdr
= regdb
;
904 const struct fwdb_country
*country
;
910 return PTR_ERR(regdb
);
912 country
= &hdr
->country
[0];
913 while (country
->coll_ptr
) {
914 if (alpha2_equal(alpha2
, country
->alpha2
))
915 return __regdb_query_wmm(regdb
, country
, freq
, rule
);
922 EXPORT_SYMBOL(reg_query_regdb_wmm
);
924 static int regdb_query_country(const struct fwdb_header
*db
,
925 const struct fwdb_country
*country
)
927 unsigned int ptr
= be16_to_cpu(country
->coll_ptr
) << 2;
928 struct fwdb_collection
*coll
= (void *)((u8
*)db
+ ptr
);
929 struct ieee80211_regdomain
*regdom
;
930 unsigned int size_of_regd
, i
;
932 size_of_regd
= sizeof(struct ieee80211_regdomain
) +
933 coll
->n_rules
* sizeof(struct ieee80211_reg_rule
);
935 regdom
= kzalloc(size_of_regd
, GFP_KERNEL
);
939 regdom
->n_reg_rules
= coll
->n_rules
;
940 regdom
->alpha2
[0] = country
->alpha2
[0];
941 regdom
->alpha2
[1] = country
->alpha2
[1];
942 regdom
->dfs_region
= coll
->dfs_region
;
944 for (i
= 0; i
< regdom
->n_reg_rules
; i
++) {
945 __be16
*rules_ptr
= (void *)((u8
*)coll
+ ALIGN(coll
->len
, 2));
946 unsigned int rule_ptr
= be16_to_cpu(rules_ptr
[i
]) << 2;
947 struct fwdb_rule
*rule
= (void *)((u8
*)db
+ rule_ptr
);
948 struct ieee80211_reg_rule
*rrule
= ®dom
->reg_rules
[i
];
950 rrule
->freq_range
.start_freq_khz
= be32_to_cpu(rule
->start
);
951 rrule
->freq_range
.end_freq_khz
= be32_to_cpu(rule
->end
);
952 rrule
->freq_range
.max_bandwidth_khz
= be32_to_cpu(rule
->max_bw
);
954 rrule
->power_rule
.max_antenna_gain
= 0;
955 rrule
->power_rule
.max_eirp
= be16_to_cpu(rule
->max_eirp
);
958 if (rule
->flags
& FWDB_FLAG_NO_OFDM
)
959 rrule
->flags
|= NL80211_RRF_NO_OFDM
;
960 if (rule
->flags
& FWDB_FLAG_NO_OUTDOOR
)
961 rrule
->flags
|= NL80211_RRF_NO_OUTDOOR
;
962 if (rule
->flags
& FWDB_FLAG_DFS
)
963 rrule
->flags
|= NL80211_RRF_DFS
;
964 if (rule
->flags
& FWDB_FLAG_NO_IR
)
965 rrule
->flags
|= NL80211_RRF_NO_IR
;
966 if (rule
->flags
& FWDB_FLAG_AUTO_BW
)
967 rrule
->flags
|= NL80211_RRF_AUTO_BW
;
969 rrule
->dfs_cac_ms
= 0;
971 /* handle optional data */
972 if (rule
->len
>= offsetofend(struct fwdb_rule
, cac_timeout
))
974 1000 * be16_to_cpu(rule
->cac_timeout
);
975 if (rule
->len
>= offsetofend(struct fwdb_rule
, wmm_ptr
)) {
976 u32 wmm_ptr
= be16_to_cpu(rule
->wmm_ptr
) << 2;
977 struct fwdb_wmm_rule
*wmm
= (void *)((u8
*)db
+ wmm_ptr
);
979 set_wmm_rule(rrule
, wmm
);
983 return reg_schedule_apply(regdom
);
986 static int query_regdb(const char *alpha2
)
988 const struct fwdb_header
*hdr
= regdb
;
989 const struct fwdb_country
*country
;
994 return PTR_ERR(regdb
);
996 country
= &hdr
->country
[0];
997 while (country
->coll_ptr
) {
998 if (alpha2_equal(alpha2
, country
->alpha2
))
999 return regdb_query_country(regdb
, country
);
1006 static void regdb_fw_cb(const struct firmware
*fw
, void *context
)
1009 bool restore
= true;
1013 pr_info("failed to load regulatory.db\n");
1014 set_error
= -ENODATA
;
1015 } else if (!valid_regdb(fw
->data
, fw
->size
)) {
1016 pr_info("loaded regulatory.db is malformed or signature is missing/invalid\n");
1017 set_error
= -EINVAL
;
1021 if (WARN_ON(regdb
&& !IS_ERR(regdb
))) {
1022 /* just restore and free new db */
1023 } else if (set_error
) {
1024 regdb
= ERR_PTR(set_error
);
1026 db
= kmemdup(fw
->data
, fw
->size
, GFP_KERNEL
);
1029 restore
= context
&& query_regdb(context
);
1036 restore_regulatory_settings(true);
1042 release_firmware(fw
);
1045 static int query_regdb_file(const char *alpha2
)
1050 return query_regdb(alpha2
);
1052 alpha2
= kmemdup(alpha2
, 2, GFP_KERNEL
);
1056 return request_firmware_nowait(THIS_MODULE
, true, "regulatory.db",
1057 ®_pdev
->dev
, GFP_KERNEL
,
1058 (void *)alpha2
, regdb_fw_cb
);
1061 int reg_reload_regdb(void)
1063 const struct firmware
*fw
;
1067 err
= request_firmware(&fw
, "regulatory.db", ®_pdev
->dev
);
1071 if (!valid_regdb(fw
->data
, fw
->size
)) {
1076 db
= kmemdup(fw
->data
, fw
->size
, GFP_KERNEL
);
1083 if (!IS_ERR_OR_NULL(regdb
))
1089 release_firmware(fw
);
1093 static bool reg_query_database(struct regulatory_request
*request
)
1095 if (query_regdb_file(request
->alpha2
) == 0)
1098 if (call_crda(request
->alpha2
) == 0)
1104 bool reg_is_valid_request(const char *alpha2
)
1106 struct regulatory_request
*lr
= get_last_request();
1108 if (!lr
|| lr
->processed
)
1111 return alpha2_equal(lr
->alpha2
, alpha2
);
1114 static const struct ieee80211_regdomain
*reg_get_regdomain(struct wiphy
*wiphy
)
1116 struct regulatory_request
*lr
= get_last_request();
1119 * Follow the driver's regulatory domain, if present, unless a country
1120 * IE has been processed or a user wants to help complaince further
1122 if (lr
->initiator
!= NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
1123 lr
->initiator
!= NL80211_REGDOM_SET_BY_USER
&&
1125 return get_wiphy_regdom(wiphy
);
1127 return get_cfg80211_regdom();
1131 reg_get_max_bandwidth_from_range(const struct ieee80211_regdomain
*rd
,
1132 const struct ieee80211_reg_rule
*rule
)
1134 const struct ieee80211_freq_range
*freq_range
= &rule
->freq_range
;
1135 const struct ieee80211_freq_range
*freq_range_tmp
;
1136 const struct ieee80211_reg_rule
*tmp
;
1137 u32 start_freq
, end_freq
, idx
, no
;
1139 for (idx
= 0; idx
< rd
->n_reg_rules
; idx
++)
1140 if (rule
== &rd
->reg_rules
[idx
])
1143 if (idx
== rd
->n_reg_rules
)
1146 /* get start_freq */
1150 tmp
= &rd
->reg_rules
[--no
];
1151 freq_range_tmp
= &tmp
->freq_range
;
1153 if (freq_range_tmp
->end_freq_khz
< freq_range
->start_freq_khz
)
1156 freq_range
= freq_range_tmp
;
1159 start_freq
= freq_range
->start_freq_khz
;
1162 freq_range
= &rule
->freq_range
;
1165 while (no
< rd
->n_reg_rules
- 1) {
1166 tmp
= &rd
->reg_rules
[++no
];
1167 freq_range_tmp
= &tmp
->freq_range
;
1169 if (freq_range_tmp
->start_freq_khz
> freq_range
->end_freq_khz
)
1172 freq_range
= freq_range_tmp
;
1175 end_freq
= freq_range
->end_freq_khz
;
1177 return end_freq
- start_freq
;
1180 unsigned int reg_get_max_bandwidth(const struct ieee80211_regdomain
*rd
,
1181 const struct ieee80211_reg_rule
*rule
)
1183 unsigned int bw
= reg_get_max_bandwidth_from_range(rd
, rule
);
1185 if (rule
->flags
& NL80211_RRF_NO_160MHZ
)
1186 bw
= min_t(unsigned int, bw
, MHZ_TO_KHZ(80));
1187 if (rule
->flags
& NL80211_RRF_NO_80MHZ
)
1188 bw
= min_t(unsigned int, bw
, MHZ_TO_KHZ(40));
1191 * HT40+/HT40- limits are handled per-channel. Only limit BW if both
1194 if (rule
->flags
& NL80211_RRF_NO_HT40MINUS
&&
1195 rule
->flags
& NL80211_RRF_NO_HT40PLUS
)
1196 bw
= min_t(unsigned int, bw
, MHZ_TO_KHZ(20));
1201 /* Sanity check on a regulatory rule */
1202 static bool is_valid_reg_rule(const struct ieee80211_reg_rule
*rule
)
1204 const struct ieee80211_freq_range
*freq_range
= &rule
->freq_range
;
1207 if (freq_range
->start_freq_khz
<= 0 || freq_range
->end_freq_khz
<= 0)
1210 if (freq_range
->start_freq_khz
> freq_range
->end_freq_khz
)
1213 freq_diff
= freq_range
->end_freq_khz
- freq_range
->start_freq_khz
;
1215 if (freq_range
->end_freq_khz
<= freq_range
->start_freq_khz
||
1216 freq_range
->max_bandwidth_khz
> freq_diff
)
1222 static bool is_valid_rd(const struct ieee80211_regdomain
*rd
)
1224 const struct ieee80211_reg_rule
*reg_rule
= NULL
;
1227 if (!rd
->n_reg_rules
)
1230 if (WARN_ON(rd
->n_reg_rules
> NL80211_MAX_SUPP_REG_RULES
))
1233 for (i
= 0; i
< rd
->n_reg_rules
; i
++) {
1234 reg_rule
= &rd
->reg_rules
[i
];
1235 if (!is_valid_reg_rule(reg_rule
))
1243 * freq_in_rule_band - tells us if a frequency is in a frequency band
1244 * @freq_range: frequency rule we want to query
1245 * @freq_khz: frequency we are inquiring about
1247 * This lets us know if a specific frequency rule is or is not relevant to
1248 * a specific frequency's band. Bands are device specific and artificial
1249 * definitions (the "2.4 GHz band", the "5 GHz band" and the "60GHz band"),
1250 * however it is safe for now to assume that a frequency rule should not be
1251 * part of a frequency's band if the start freq or end freq are off by more
1252 * than 2 GHz for the 2.4 and 5 GHz bands, and by more than 10 GHz for the
1254 * This resolution can be lowered and should be considered as we add
1255 * regulatory rule support for other "bands".
1257 static bool freq_in_rule_band(const struct ieee80211_freq_range
*freq_range
,
1260 #define ONE_GHZ_IN_KHZ 1000000
1262 * From 802.11ad: directional multi-gigabit (DMG):
1263 * Pertaining to operation in a frequency band containing a channel
1264 * with the Channel starting frequency above 45 GHz.
1266 u32 limit
= freq_khz
> 45 * ONE_GHZ_IN_KHZ
?
1267 10 * ONE_GHZ_IN_KHZ
: 2 * ONE_GHZ_IN_KHZ
;
1268 if (abs(freq_khz
- freq_range
->start_freq_khz
) <= limit
)
1270 if (abs(freq_khz
- freq_range
->end_freq_khz
) <= limit
)
1273 #undef ONE_GHZ_IN_KHZ
1277 * Later on we can perhaps use the more restrictive DFS
1278 * region but we don't have information for that yet so
1279 * for now simply disallow conflicts.
1281 static enum nl80211_dfs_regions
1282 reg_intersect_dfs_region(const enum nl80211_dfs_regions dfs_region1
,
1283 const enum nl80211_dfs_regions dfs_region2
)
1285 if (dfs_region1
!= dfs_region2
)
1286 return NL80211_DFS_UNSET
;
1291 * Helper for regdom_intersect(), this does the real
1292 * mathematical intersection fun
1294 static int reg_rules_intersect(const struct ieee80211_regdomain
*rd1
,
1295 const struct ieee80211_regdomain
*rd2
,
1296 const struct ieee80211_reg_rule
*rule1
,
1297 const struct ieee80211_reg_rule
*rule2
,
1298 struct ieee80211_reg_rule
*intersected_rule
)
1300 const struct ieee80211_freq_range
*freq_range1
, *freq_range2
;
1301 struct ieee80211_freq_range
*freq_range
;
1302 const struct ieee80211_power_rule
*power_rule1
, *power_rule2
;
1303 struct ieee80211_power_rule
*power_rule
;
1304 u32 freq_diff
, max_bandwidth1
, max_bandwidth2
;
1306 freq_range1
= &rule1
->freq_range
;
1307 freq_range2
= &rule2
->freq_range
;
1308 freq_range
= &intersected_rule
->freq_range
;
1310 power_rule1
= &rule1
->power_rule
;
1311 power_rule2
= &rule2
->power_rule
;
1312 power_rule
= &intersected_rule
->power_rule
;
1314 freq_range
->start_freq_khz
= max(freq_range1
->start_freq_khz
,
1315 freq_range2
->start_freq_khz
);
1316 freq_range
->end_freq_khz
= min(freq_range1
->end_freq_khz
,
1317 freq_range2
->end_freq_khz
);
1319 max_bandwidth1
= freq_range1
->max_bandwidth_khz
;
1320 max_bandwidth2
= freq_range2
->max_bandwidth_khz
;
1322 if (rule1
->flags
& NL80211_RRF_AUTO_BW
)
1323 max_bandwidth1
= reg_get_max_bandwidth(rd1
, rule1
);
1324 if (rule2
->flags
& NL80211_RRF_AUTO_BW
)
1325 max_bandwidth2
= reg_get_max_bandwidth(rd2
, rule2
);
1327 freq_range
->max_bandwidth_khz
= min(max_bandwidth1
, max_bandwidth2
);
1329 intersected_rule
->flags
= rule1
->flags
| rule2
->flags
;
1332 * In case NL80211_RRF_AUTO_BW requested for both rules
1333 * set AUTO_BW in intersected rule also. Next we will
1334 * calculate BW correctly in handle_channel function.
1335 * In other case remove AUTO_BW flag while we calculate
1336 * maximum bandwidth correctly and auto calculation is
1339 if ((rule1
->flags
& NL80211_RRF_AUTO_BW
) &&
1340 (rule2
->flags
& NL80211_RRF_AUTO_BW
))
1341 intersected_rule
->flags
|= NL80211_RRF_AUTO_BW
;
1343 intersected_rule
->flags
&= ~NL80211_RRF_AUTO_BW
;
1345 freq_diff
= freq_range
->end_freq_khz
- freq_range
->start_freq_khz
;
1346 if (freq_range
->max_bandwidth_khz
> freq_diff
)
1347 freq_range
->max_bandwidth_khz
= freq_diff
;
1349 power_rule
->max_eirp
= min(power_rule1
->max_eirp
,
1350 power_rule2
->max_eirp
);
1351 power_rule
->max_antenna_gain
= min(power_rule1
->max_antenna_gain
,
1352 power_rule2
->max_antenna_gain
);
1354 intersected_rule
->dfs_cac_ms
= max(rule1
->dfs_cac_ms
,
1357 if (!is_valid_reg_rule(intersected_rule
))
1363 /* check whether old rule contains new rule */
1364 static bool rule_contains(struct ieee80211_reg_rule
*r1
,
1365 struct ieee80211_reg_rule
*r2
)
1367 /* for simplicity, currently consider only same flags */
1368 if (r1
->flags
!= r2
->flags
)
1371 /* verify r1 is more restrictive */
1372 if ((r1
->power_rule
.max_antenna_gain
>
1373 r2
->power_rule
.max_antenna_gain
) ||
1374 r1
->power_rule
.max_eirp
> r2
->power_rule
.max_eirp
)
1377 /* make sure r2's range is contained within r1 */
1378 if (r1
->freq_range
.start_freq_khz
> r2
->freq_range
.start_freq_khz
||
1379 r1
->freq_range
.end_freq_khz
< r2
->freq_range
.end_freq_khz
)
1382 /* and finally verify that r1.max_bw >= r2.max_bw */
1383 if (r1
->freq_range
.max_bandwidth_khz
<
1384 r2
->freq_range
.max_bandwidth_khz
)
1390 /* add or extend current rules. do nothing if rule is already contained */
1391 static void add_rule(struct ieee80211_reg_rule
*rule
,
1392 struct ieee80211_reg_rule
*reg_rules
, u32
*n_rules
)
1394 struct ieee80211_reg_rule
*tmp_rule
;
1397 for (i
= 0; i
< *n_rules
; i
++) {
1398 tmp_rule
= ®_rules
[i
];
1399 /* rule is already contained - do nothing */
1400 if (rule_contains(tmp_rule
, rule
))
1403 /* extend rule if possible */
1404 if (rule_contains(rule
, tmp_rule
)) {
1405 memcpy(tmp_rule
, rule
, sizeof(*rule
));
1410 memcpy(®_rules
[*n_rules
], rule
, sizeof(*rule
));
1415 * regdom_intersect - do the intersection between two regulatory domains
1416 * @rd1: first regulatory domain
1417 * @rd2: second regulatory domain
1419 * Use this function to get the intersection between two regulatory domains.
1420 * Once completed we will mark the alpha2 for the rd as intersected, "98",
1421 * as no one single alpha2 can represent this regulatory domain.
1423 * Returns a pointer to the regulatory domain structure which will hold the
1424 * resulting intersection of rules between rd1 and rd2. We will
1425 * kzalloc() this structure for you.
1427 static struct ieee80211_regdomain
*
1428 regdom_intersect(const struct ieee80211_regdomain
*rd1
,
1429 const struct ieee80211_regdomain
*rd2
)
1431 int r
, size_of_regd
;
1433 unsigned int num_rules
= 0;
1434 const struct ieee80211_reg_rule
*rule1
, *rule2
;
1435 struct ieee80211_reg_rule intersected_rule
;
1436 struct ieee80211_regdomain
*rd
;
1442 * First we get a count of the rules we'll need, then we actually
1443 * build them. This is to so we can malloc() and free() a
1444 * regdomain once. The reason we use reg_rules_intersect() here
1445 * is it will return -EINVAL if the rule computed makes no sense.
1446 * All rules that do check out OK are valid.
1449 for (x
= 0; x
< rd1
->n_reg_rules
; x
++) {
1450 rule1
= &rd1
->reg_rules
[x
];
1451 for (y
= 0; y
< rd2
->n_reg_rules
; y
++) {
1452 rule2
= &rd2
->reg_rules
[y
];
1453 if (!reg_rules_intersect(rd1
, rd2
, rule1
, rule2
,
1462 size_of_regd
= sizeof(struct ieee80211_regdomain
) +
1463 num_rules
* sizeof(struct ieee80211_reg_rule
);
1465 rd
= kzalloc(size_of_regd
, GFP_KERNEL
);
1469 for (x
= 0; x
< rd1
->n_reg_rules
; x
++) {
1470 rule1
= &rd1
->reg_rules
[x
];
1471 for (y
= 0; y
< rd2
->n_reg_rules
; y
++) {
1472 rule2
= &rd2
->reg_rules
[y
];
1473 r
= reg_rules_intersect(rd1
, rd2
, rule1
, rule2
,
1476 * No need to memset here the intersected rule here as
1477 * we're not using the stack anymore
1482 add_rule(&intersected_rule
, rd
->reg_rules
,
1487 rd
->alpha2
[0] = '9';
1488 rd
->alpha2
[1] = '8';
1489 rd
->dfs_region
= reg_intersect_dfs_region(rd1
->dfs_region
,
1496 * XXX: add support for the rest of enum nl80211_reg_rule_flags, we may
1497 * want to just have the channel structure use these
1499 static u32
map_regdom_flags(u32 rd_flags
)
1501 u32 channel_flags
= 0;
1502 if (rd_flags
& NL80211_RRF_NO_IR_ALL
)
1503 channel_flags
|= IEEE80211_CHAN_NO_IR
;
1504 if (rd_flags
& NL80211_RRF_DFS
)
1505 channel_flags
|= IEEE80211_CHAN_RADAR
;
1506 if (rd_flags
& NL80211_RRF_NO_OFDM
)
1507 channel_flags
|= IEEE80211_CHAN_NO_OFDM
;
1508 if (rd_flags
& NL80211_RRF_NO_OUTDOOR
)
1509 channel_flags
|= IEEE80211_CHAN_INDOOR_ONLY
;
1510 if (rd_flags
& NL80211_RRF_IR_CONCURRENT
)
1511 channel_flags
|= IEEE80211_CHAN_IR_CONCURRENT
;
1512 if (rd_flags
& NL80211_RRF_NO_HT40MINUS
)
1513 channel_flags
|= IEEE80211_CHAN_NO_HT40MINUS
;
1514 if (rd_flags
& NL80211_RRF_NO_HT40PLUS
)
1515 channel_flags
|= IEEE80211_CHAN_NO_HT40PLUS
;
1516 if (rd_flags
& NL80211_RRF_NO_80MHZ
)
1517 channel_flags
|= IEEE80211_CHAN_NO_80MHZ
;
1518 if (rd_flags
& NL80211_RRF_NO_160MHZ
)
1519 channel_flags
|= IEEE80211_CHAN_NO_160MHZ
;
1520 return channel_flags
;
1523 static const struct ieee80211_reg_rule
*
1524 freq_reg_info_regd(u32 center_freq
,
1525 const struct ieee80211_regdomain
*regd
, u32 bw
)
1528 bool band_rule_found
= false;
1529 bool bw_fits
= false;
1532 return ERR_PTR(-EINVAL
);
1534 for (i
= 0; i
< regd
->n_reg_rules
; i
++) {
1535 const struct ieee80211_reg_rule
*rr
;
1536 const struct ieee80211_freq_range
*fr
= NULL
;
1538 rr
= ®d
->reg_rules
[i
];
1539 fr
= &rr
->freq_range
;
1542 * We only need to know if one frequency rule was
1543 * was in center_freq's band, that's enough, so lets
1544 * not overwrite it once found
1546 if (!band_rule_found
)
1547 band_rule_found
= freq_in_rule_band(fr
, center_freq
);
1549 bw_fits
= cfg80211_does_bw_fit_range(fr
, center_freq
, bw
);
1551 if (band_rule_found
&& bw_fits
)
1555 if (!band_rule_found
)
1556 return ERR_PTR(-ERANGE
);
1558 return ERR_PTR(-EINVAL
);
1561 static const struct ieee80211_reg_rule
*
1562 __freq_reg_info(struct wiphy
*wiphy
, u32 center_freq
, u32 min_bw
)
1564 const struct ieee80211_regdomain
*regd
= reg_get_regdomain(wiphy
);
1565 const struct ieee80211_reg_rule
*reg_rule
= NULL
;
1568 for (bw
= MHZ_TO_KHZ(20); bw
>= min_bw
; bw
= bw
/ 2) {
1569 reg_rule
= freq_reg_info_regd(center_freq
, regd
, bw
);
1570 if (!IS_ERR(reg_rule
))
1577 const struct ieee80211_reg_rule
*freq_reg_info(struct wiphy
*wiphy
,
1580 return __freq_reg_info(wiphy
, center_freq
, MHZ_TO_KHZ(20));
1582 EXPORT_SYMBOL(freq_reg_info
);
1584 const char *reg_initiator_name(enum nl80211_reg_initiator initiator
)
1586 switch (initiator
) {
1587 case NL80211_REGDOM_SET_BY_CORE
:
1589 case NL80211_REGDOM_SET_BY_USER
:
1591 case NL80211_REGDOM_SET_BY_DRIVER
:
1593 case NL80211_REGDOM_SET_BY_COUNTRY_IE
:
1594 return "country element";
1600 EXPORT_SYMBOL(reg_initiator_name
);
1602 static uint32_t reg_rule_to_chan_bw_flags(const struct ieee80211_regdomain
*regd
,
1603 const struct ieee80211_reg_rule
*reg_rule
,
1604 const struct ieee80211_channel
*chan
)
1606 const struct ieee80211_freq_range
*freq_range
= NULL
;
1607 u32 max_bandwidth_khz
, bw_flags
= 0;
1609 freq_range
= ®_rule
->freq_range
;
1611 max_bandwidth_khz
= freq_range
->max_bandwidth_khz
;
1612 /* Check if auto calculation requested */
1613 if (reg_rule
->flags
& NL80211_RRF_AUTO_BW
)
1614 max_bandwidth_khz
= reg_get_max_bandwidth(regd
, reg_rule
);
1616 /* If we get a reg_rule we can assume that at least 5Mhz fit */
1617 if (!cfg80211_does_bw_fit_range(freq_range
,
1618 MHZ_TO_KHZ(chan
->center_freq
),
1620 bw_flags
|= IEEE80211_CHAN_NO_10MHZ
;
1621 if (!cfg80211_does_bw_fit_range(freq_range
,
1622 MHZ_TO_KHZ(chan
->center_freq
),
1624 bw_flags
|= IEEE80211_CHAN_NO_20MHZ
;
1626 if (max_bandwidth_khz
< MHZ_TO_KHZ(10))
1627 bw_flags
|= IEEE80211_CHAN_NO_10MHZ
;
1628 if (max_bandwidth_khz
< MHZ_TO_KHZ(20))
1629 bw_flags
|= IEEE80211_CHAN_NO_20MHZ
;
1630 if (max_bandwidth_khz
< MHZ_TO_KHZ(40))
1631 bw_flags
|= IEEE80211_CHAN_NO_HT40
;
1632 if (max_bandwidth_khz
< MHZ_TO_KHZ(80))
1633 bw_flags
|= IEEE80211_CHAN_NO_80MHZ
;
1634 if (max_bandwidth_khz
< MHZ_TO_KHZ(160))
1635 bw_flags
|= IEEE80211_CHAN_NO_160MHZ
;
1640 * Note that right now we assume the desired channel bandwidth
1641 * is always 20 MHz for each individual channel (HT40 uses 20 MHz
1642 * per channel, the primary and the extension channel).
1644 static void handle_channel(struct wiphy
*wiphy
,
1645 enum nl80211_reg_initiator initiator
,
1646 struct ieee80211_channel
*chan
)
1648 u32 flags
, bw_flags
= 0;
1649 const struct ieee80211_reg_rule
*reg_rule
= NULL
;
1650 const struct ieee80211_power_rule
*power_rule
= NULL
;
1651 struct wiphy
*request_wiphy
= NULL
;
1652 struct regulatory_request
*lr
= get_last_request();
1653 const struct ieee80211_regdomain
*regd
;
1655 request_wiphy
= wiphy_idx_to_wiphy(lr
->wiphy_idx
);
1657 flags
= chan
->orig_flags
;
1659 reg_rule
= freq_reg_info(wiphy
, MHZ_TO_KHZ(chan
->center_freq
));
1660 if (IS_ERR(reg_rule
)) {
1662 * We will disable all channels that do not match our
1663 * received regulatory rule unless the hint is coming
1664 * from a Country IE and the Country IE had no information
1665 * about a band. The IEEE 802.11 spec allows for an AP
1666 * to send only a subset of the regulatory rules allowed,
1667 * so an AP in the US that only supports 2.4 GHz may only send
1668 * a country IE with information for the 2.4 GHz band
1669 * while 5 GHz is still supported.
1671 if (initiator
== NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
1672 PTR_ERR(reg_rule
) == -ERANGE
)
1675 if (lr
->initiator
== NL80211_REGDOM_SET_BY_DRIVER
&&
1676 request_wiphy
&& request_wiphy
== wiphy
&&
1677 request_wiphy
->regulatory_flags
& REGULATORY_STRICT_REG
) {
1678 pr_debug("Disabling freq %d MHz for good\n",
1680 chan
->orig_flags
|= IEEE80211_CHAN_DISABLED
;
1681 chan
->flags
= chan
->orig_flags
;
1683 pr_debug("Disabling freq %d MHz\n",
1685 chan
->flags
|= IEEE80211_CHAN_DISABLED
;
1690 regd
= reg_get_regdomain(wiphy
);
1692 power_rule
= ®_rule
->power_rule
;
1693 bw_flags
= reg_rule_to_chan_bw_flags(regd
, reg_rule
, chan
);
1695 if (lr
->initiator
== NL80211_REGDOM_SET_BY_DRIVER
&&
1696 request_wiphy
&& request_wiphy
== wiphy
&&
1697 request_wiphy
->regulatory_flags
& REGULATORY_STRICT_REG
) {
1699 * This guarantees the driver's requested regulatory domain
1700 * will always be used as a base for further regulatory
1703 chan
->flags
= chan
->orig_flags
=
1704 map_regdom_flags(reg_rule
->flags
) | bw_flags
;
1705 chan
->max_antenna_gain
= chan
->orig_mag
=
1706 (int) MBI_TO_DBI(power_rule
->max_antenna_gain
);
1707 chan
->max_reg_power
= chan
->max_power
= chan
->orig_mpwr
=
1708 (int) MBM_TO_DBM(power_rule
->max_eirp
);
1710 if (chan
->flags
& IEEE80211_CHAN_RADAR
) {
1711 chan
->dfs_cac_ms
= IEEE80211_DFS_MIN_CAC_TIME_MS
;
1712 if (reg_rule
->dfs_cac_ms
)
1713 chan
->dfs_cac_ms
= reg_rule
->dfs_cac_ms
;
1719 chan
->dfs_state
= NL80211_DFS_USABLE
;
1720 chan
->dfs_state_entered
= jiffies
;
1722 chan
->beacon_found
= false;
1723 chan
->flags
= flags
| bw_flags
| map_regdom_flags(reg_rule
->flags
);
1724 chan
->max_antenna_gain
=
1725 min_t(int, chan
->orig_mag
,
1726 MBI_TO_DBI(power_rule
->max_antenna_gain
));
1727 chan
->max_reg_power
= (int) MBM_TO_DBM(power_rule
->max_eirp
);
1729 if (chan
->flags
& IEEE80211_CHAN_RADAR
) {
1730 if (reg_rule
->dfs_cac_ms
)
1731 chan
->dfs_cac_ms
= reg_rule
->dfs_cac_ms
;
1733 chan
->dfs_cac_ms
= IEEE80211_DFS_MIN_CAC_TIME_MS
;
1736 if (chan
->orig_mpwr
) {
1738 * Devices that use REGULATORY_COUNTRY_IE_FOLLOW_POWER
1739 * will always follow the passed country IE power settings.
1741 if (initiator
== NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
1742 wiphy
->regulatory_flags
& REGULATORY_COUNTRY_IE_FOLLOW_POWER
)
1743 chan
->max_power
= chan
->max_reg_power
;
1745 chan
->max_power
= min(chan
->orig_mpwr
,
1746 chan
->max_reg_power
);
1748 chan
->max_power
= chan
->max_reg_power
;
1751 static void handle_band(struct wiphy
*wiphy
,
1752 enum nl80211_reg_initiator initiator
,
1753 struct ieee80211_supported_band
*sband
)
1760 for (i
= 0; i
< sband
->n_channels
; i
++)
1761 handle_channel(wiphy
, initiator
, &sband
->channels
[i
]);
1764 static bool reg_request_cell_base(struct regulatory_request
*request
)
1766 if (request
->initiator
!= NL80211_REGDOM_SET_BY_USER
)
1768 return request
->user_reg_hint_type
== NL80211_USER_REG_HINT_CELL_BASE
;
1771 bool reg_last_request_cell_base(void)
1773 return reg_request_cell_base(get_last_request());
1776 #ifdef CONFIG_CFG80211_REG_CELLULAR_HINTS
1777 /* Core specific check */
1778 static enum reg_request_treatment
1779 reg_ignore_cell_hint(struct regulatory_request
*pending_request
)
1781 struct regulatory_request
*lr
= get_last_request();
1783 if (!reg_num_devs_support_basehint
)
1784 return REG_REQ_IGNORE
;
1786 if (reg_request_cell_base(lr
) &&
1787 !regdom_changes(pending_request
->alpha2
))
1788 return REG_REQ_ALREADY_SET
;
1793 /* Device specific check */
1794 static bool reg_dev_ignore_cell_hint(struct wiphy
*wiphy
)
1796 return !(wiphy
->features
& NL80211_FEATURE_CELL_BASE_REG_HINTS
);
1799 static enum reg_request_treatment
1800 reg_ignore_cell_hint(struct regulatory_request
*pending_request
)
1802 return REG_REQ_IGNORE
;
1805 static bool reg_dev_ignore_cell_hint(struct wiphy
*wiphy
)
1811 static bool wiphy_strict_alpha2_regd(struct wiphy
*wiphy
)
1813 if (wiphy
->regulatory_flags
& REGULATORY_STRICT_REG
&&
1814 !(wiphy
->regulatory_flags
& REGULATORY_CUSTOM_REG
))
1819 static bool ignore_reg_update(struct wiphy
*wiphy
,
1820 enum nl80211_reg_initiator initiator
)
1822 struct regulatory_request
*lr
= get_last_request();
1824 if (wiphy
->regulatory_flags
& REGULATORY_WIPHY_SELF_MANAGED
)
1828 pr_debug("Ignoring regulatory request set by %s since last_request is not set\n",
1829 reg_initiator_name(initiator
));
1833 if (initiator
== NL80211_REGDOM_SET_BY_CORE
&&
1834 wiphy
->regulatory_flags
& REGULATORY_CUSTOM_REG
) {
1835 pr_debug("Ignoring regulatory request set by %s since the driver uses its own custom regulatory domain\n",
1836 reg_initiator_name(initiator
));
1841 * wiphy->regd will be set once the device has its own
1842 * desired regulatory domain set
1844 if (wiphy_strict_alpha2_regd(wiphy
) && !wiphy
->regd
&&
1845 initiator
!= NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
1846 !is_world_regdom(lr
->alpha2
)) {
1847 pr_debug("Ignoring regulatory request set by %s since the driver requires its own regulatory domain to be set first\n",
1848 reg_initiator_name(initiator
));
1852 if (reg_request_cell_base(lr
))
1853 return reg_dev_ignore_cell_hint(wiphy
);
1858 static bool reg_is_world_roaming(struct wiphy
*wiphy
)
1860 const struct ieee80211_regdomain
*cr
= get_cfg80211_regdom();
1861 const struct ieee80211_regdomain
*wr
= get_wiphy_regdom(wiphy
);
1862 struct regulatory_request
*lr
= get_last_request();
1864 if (is_world_regdom(cr
->alpha2
) || (wr
&& is_world_regdom(wr
->alpha2
)))
1867 if (lr
&& lr
->initiator
!= NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
1868 wiphy
->regulatory_flags
& REGULATORY_CUSTOM_REG
)
1874 static void handle_reg_beacon(struct wiphy
*wiphy
, unsigned int chan_idx
,
1875 struct reg_beacon
*reg_beacon
)
1877 struct ieee80211_supported_band
*sband
;
1878 struct ieee80211_channel
*chan
;
1879 bool channel_changed
= false;
1880 struct ieee80211_channel chan_before
;
1882 sband
= wiphy
->bands
[reg_beacon
->chan
.band
];
1883 chan
= &sband
->channels
[chan_idx
];
1885 if (likely(chan
->center_freq
!= reg_beacon
->chan
.center_freq
))
1888 if (chan
->beacon_found
)
1891 chan
->beacon_found
= true;
1893 if (!reg_is_world_roaming(wiphy
))
1896 if (wiphy
->regulatory_flags
& REGULATORY_DISABLE_BEACON_HINTS
)
1899 chan_before
= *chan
;
1901 if (chan
->flags
& IEEE80211_CHAN_NO_IR
) {
1902 chan
->flags
&= ~IEEE80211_CHAN_NO_IR
;
1903 channel_changed
= true;
1906 if (channel_changed
)
1907 nl80211_send_beacon_hint_event(wiphy
, &chan_before
, chan
);
1911 * Called when a scan on a wiphy finds a beacon on
1914 static void wiphy_update_new_beacon(struct wiphy
*wiphy
,
1915 struct reg_beacon
*reg_beacon
)
1918 struct ieee80211_supported_band
*sband
;
1920 if (!wiphy
->bands
[reg_beacon
->chan
.band
])
1923 sband
= wiphy
->bands
[reg_beacon
->chan
.band
];
1925 for (i
= 0; i
< sband
->n_channels
; i
++)
1926 handle_reg_beacon(wiphy
, i
, reg_beacon
);
1930 * Called upon reg changes or a new wiphy is added
1932 static void wiphy_update_beacon_reg(struct wiphy
*wiphy
)
1935 struct ieee80211_supported_band
*sband
;
1936 struct reg_beacon
*reg_beacon
;
1938 list_for_each_entry(reg_beacon
, ®_beacon_list
, list
) {
1939 if (!wiphy
->bands
[reg_beacon
->chan
.band
])
1941 sband
= wiphy
->bands
[reg_beacon
->chan
.band
];
1942 for (i
= 0; i
< sband
->n_channels
; i
++)
1943 handle_reg_beacon(wiphy
, i
, reg_beacon
);
1947 /* Reap the advantages of previously found beacons */
1948 static void reg_process_beacons(struct wiphy
*wiphy
)
1951 * Means we are just firing up cfg80211, so no beacons would
1952 * have been processed yet.
1956 wiphy_update_beacon_reg(wiphy
);
1959 static bool is_ht40_allowed(struct ieee80211_channel
*chan
)
1963 if (chan
->flags
& IEEE80211_CHAN_DISABLED
)
1965 /* This would happen when regulatory rules disallow HT40 completely */
1966 if ((chan
->flags
& IEEE80211_CHAN_NO_HT40
) == IEEE80211_CHAN_NO_HT40
)
1971 static void reg_process_ht_flags_channel(struct wiphy
*wiphy
,
1972 struct ieee80211_channel
*channel
)
1974 struct ieee80211_supported_band
*sband
= wiphy
->bands
[channel
->band
];
1975 struct ieee80211_channel
*channel_before
= NULL
, *channel_after
= NULL
;
1976 const struct ieee80211_regdomain
*regd
;
1980 if (!is_ht40_allowed(channel
)) {
1981 channel
->flags
|= IEEE80211_CHAN_NO_HT40
;
1986 * We need to ensure the extension channels exist to
1987 * be able to use HT40- or HT40+, this finds them (or not)
1989 for (i
= 0; i
< sband
->n_channels
; i
++) {
1990 struct ieee80211_channel
*c
= &sband
->channels
[i
];
1992 if (c
->center_freq
== (channel
->center_freq
- 20))
1994 if (c
->center_freq
== (channel
->center_freq
+ 20))
1999 regd
= get_wiphy_regdom(wiphy
);
2001 const struct ieee80211_reg_rule
*reg_rule
=
2002 freq_reg_info_regd(MHZ_TO_KHZ(channel
->center_freq
),
2003 regd
, MHZ_TO_KHZ(20));
2005 if (!IS_ERR(reg_rule
))
2006 flags
= reg_rule
->flags
;
2010 * Please note that this assumes target bandwidth is 20 MHz,
2011 * if that ever changes we also need to change the below logic
2012 * to include that as well.
2014 if (!is_ht40_allowed(channel_before
) ||
2015 flags
& NL80211_RRF_NO_HT40MINUS
)
2016 channel
->flags
|= IEEE80211_CHAN_NO_HT40MINUS
;
2018 channel
->flags
&= ~IEEE80211_CHAN_NO_HT40MINUS
;
2020 if (!is_ht40_allowed(channel_after
) ||
2021 flags
& NL80211_RRF_NO_HT40PLUS
)
2022 channel
->flags
|= IEEE80211_CHAN_NO_HT40PLUS
;
2024 channel
->flags
&= ~IEEE80211_CHAN_NO_HT40PLUS
;
2027 static void reg_process_ht_flags_band(struct wiphy
*wiphy
,
2028 struct ieee80211_supported_band
*sband
)
2035 for (i
= 0; i
< sband
->n_channels
; i
++)
2036 reg_process_ht_flags_channel(wiphy
, &sband
->channels
[i
]);
2039 static void reg_process_ht_flags(struct wiphy
*wiphy
)
2041 enum nl80211_band band
;
2046 for (band
= 0; band
< NUM_NL80211_BANDS
; band
++)
2047 reg_process_ht_flags_band(wiphy
, wiphy
->bands
[band
]);
2050 static void reg_call_notifier(struct wiphy
*wiphy
,
2051 struct regulatory_request
*request
)
2053 if (wiphy
->reg_notifier
)
2054 wiphy
->reg_notifier(wiphy
, request
);
2057 static bool reg_wdev_chan_valid(struct wiphy
*wiphy
, struct wireless_dev
*wdev
)
2059 struct cfg80211_chan_def chandef
;
2060 struct cfg80211_registered_device
*rdev
= wiphy_to_rdev(wiphy
);
2061 enum nl80211_iftype iftype
;
2064 iftype
= wdev
->iftype
;
2066 /* make sure the interface is active */
2067 if (!wdev
->netdev
|| !netif_running(wdev
->netdev
))
2068 goto wdev_inactive_unlock
;
2071 case NL80211_IFTYPE_AP
:
2072 case NL80211_IFTYPE_P2P_GO
:
2073 if (!wdev
->beacon_interval
)
2074 goto wdev_inactive_unlock
;
2075 chandef
= wdev
->chandef
;
2077 case NL80211_IFTYPE_ADHOC
:
2078 if (!wdev
->ssid_len
)
2079 goto wdev_inactive_unlock
;
2080 chandef
= wdev
->chandef
;
2082 case NL80211_IFTYPE_STATION
:
2083 case NL80211_IFTYPE_P2P_CLIENT
:
2084 if (!wdev
->current_bss
||
2085 !wdev
->current_bss
->pub
.channel
)
2086 goto wdev_inactive_unlock
;
2088 if (!rdev
->ops
->get_channel
||
2089 rdev_get_channel(rdev
, wdev
, &chandef
))
2090 cfg80211_chandef_create(&chandef
,
2091 wdev
->current_bss
->pub
.channel
,
2092 NL80211_CHAN_NO_HT
);
2094 case NL80211_IFTYPE_MONITOR
:
2095 case NL80211_IFTYPE_AP_VLAN
:
2096 case NL80211_IFTYPE_P2P_DEVICE
:
2097 /* no enforcement required */
2100 /* others not implemented for now */
2108 case NL80211_IFTYPE_AP
:
2109 case NL80211_IFTYPE_P2P_GO
:
2110 case NL80211_IFTYPE_ADHOC
:
2111 return cfg80211_reg_can_beacon_relax(wiphy
, &chandef
, iftype
);
2112 case NL80211_IFTYPE_STATION
:
2113 case NL80211_IFTYPE_P2P_CLIENT
:
2114 return cfg80211_chandef_usable(wiphy
, &chandef
,
2115 IEEE80211_CHAN_DISABLED
);
2122 wdev_inactive_unlock
:
2127 static void reg_leave_invalid_chans(struct wiphy
*wiphy
)
2129 struct wireless_dev
*wdev
;
2130 struct cfg80211_registered_device
*rdev
= wiphy_to_rdev(wiphy
);
2134 list_for_each_entry(wdev
, &rdev
->wiphy
.wdev_list
, list
)
2135 if (!reg_wdev_chan_valid(wiphy
, wdev
))
2136 cfg80211_leave(rdev
, wdev
);
2139 static void reg_check_chans_work(struct work_struct
*work
)
2141 struct cfg80211_registered_device
*rdev
;
2143 pr_debug("Verifying active interfaces after reg change\n");
2146 list_for_each_entry(rdev
, &cfg80211_rdev_list
, list
)
2147 if (!(rdev
->wiphy
.regulatory_flags
&
2148 REGULATORY_IGNORE_STALE_KICKOFF
))
2149 reg_leave_invalid_chans(&rdev
->wiphy
);
2154 static void reg_check_channels(void)
2157 * Give usermode a chance to do something nicer (move to another
2158 * channel, orderly disconnection), before forcing a disconnection.
2160 mod_delayed_work(system_power_efficient_wq
,
2162 msecs_to_jiffies(REG_ENFORCE_GRACE_MS
));
2165 static void wiphy_update_regulatory(struct wiphy
*wiphy
,
2166 enum nl80211_reg_initiator initiator
)
2168 enum nl80211_band band
;
2169 struct regulatory_request
*lr
= get_last_request();
2171 if (ignore_reg_update(wiphy
, initiator
)) {
2173 * Regulatory updates set by CORE are ignored for custom
2174 * regulatory cards. Let us notify the changes to the driver,
2175 * as some drivers used this to restore its orig_* reg domain.
2177 if (initiator
== NL80211_REGDOM_SET_BY_CORE
&&
2178 wiphy
->regulatory_flags
& REGULATORY_CUSTOM_REG
&&
2179 !(wiphy
->regulatory_flags
&
2180 REGULATORY_WIPHY_SELF_MANAGED
))
2181 reg_call_notifier(wiphy
, lr
);
2185 lr
->dfs_region
= get_cfg80211_regdom()->dfs_region
;
2187 for (band
= 0; band
< NUM_NL80211_BANDS
; band
++)
2188 handle_band(wiphy
, initiator
, wiphy
->bands
[band
]);
2190 reg_process_beacons(wiphy
);
2191 reg_process_ht_flags(wiphy
);
2192 reg_call_notifier(wiphy
, lr
);
2195 static void update_all_wiphy_regulatory(enum nl80211_reg_initiator initiator
)
2197 struct cfg80211_registered_device
*rdev
;
2198 struct wiphy
*wiphy
;
2202 list_for_each_entry(rdev
, &cfg80211_rdev_list
, list
) {
2203 wiphy
= &rdev
->wiphy
;
2204 wiphy_update_regulatory(wiphy
, initiator
);
2207 reg_check_channels();
2210 static void handle_channel_custom(struct wiphy
*wiphy
,
2211 struct ieee80211_channel
*chan
,
2212 const struct ieee80211_regdomain
*regd
)
2215 const struct ieee80211_reg_rule
*reg_rule
= NULL
;
2216 const struct ieee80211_power_rule
*power_rule
= NULL
;
2219 for (bw
= MHZ_TO_KHZ(20); bw
>= MHZ_TO_KHZ(5); bw
= bw
/ 2) {
2220 reg_rule
= freq_reg_info_regd(MHZ_TO_KHZ(chan
->center_freq
),
2222 if (!IS_ERR(reg_rule
))
2226 if (IS_ERR(reg_rule
)) {
2227 pr_debug("Disabling freq %d MHz as custom regd has no rule that fits it\n",
2229 if (wiphy
->regulatory_flags
& REGULATORY_WIPHY_SELF_MANAGED
) {
2230 chan
->flags
|= IEEE80211_CHAN_DISABLED
;
2232 chan
->orig_flags
|= IEEE80211_CHAN_DISABLED
;
2233 chan
->flags
= chan
->orig_flags
;
2238 power_rule
= ®_rule
->power_rule
;
2239 bw_flags
= reg_rule_to_chan_bw_flags(regd
, reg_rule
, chan
);
2241 chan
->dfs_state_entered
= jiffies
;
2242 chan
->dfs_state
= NL80211_DFS_USABLE
;
2244 chan
->beacon_found
= false;
2246 if (wiphy
->regulatory_flags
& REGULATORY_WIPHY_SELF_MANAGED
)
2247 chan
->flags
= chan
->orig_flags
| bw_flags
|
2248 map_regdom_flags(reg_rule
->flags
);
2250 chan
->flags
|= map_regdom_flags(reg_rule
->flags
) | bw_flags
;
2252 chan
->max_antenna_gain
= (int) MBI_TO_DBI(power_rule
->max_antenna_gain
);
2253 chan
->max_reg_power
= chan
->max_power
=
2254 (int) MBM_TO_DBM(power_rule
->max_eirp
);
2256 if (chan
->flags
& IEEE80211_CHAN_RADAR
) {
2257 if (reg_rule
->dfs_cac_ms
)
2258 chan
->dfs_cac_ms
= reg_rule
->dfs_cac_ms
;
2260 chan
->dfs_cac_ms
= IEEE80211_DFS_MIN_CAC_TIME_MS
;
2263 chan
->max_power
= chan
->max_reg_power
;
2266 static void handle_band_custom(struct wiphy
*wiphy
,
2267 struct ieee80211_supported_band
*sband
,
2268 const struct ieee80211_regdomain
*regd
)
2275 for (i
= 0; i
< sband
->n_channels
; i
++)
2276 handle_channel_custom(wiphy
, &sband
->channels
[i
], regd
);
2279 /* Used by drivers prior to wiphy registration */
2280 void wiphy_apply_custom_regulatory(struct wiphy
*wiphy
,
2281 const struct ieee80211_regdomain
*regd
)
2283 enum nl80211_band band
;
2284 unsigned int bands_set
= 0;
2286 WARN(!(wiphy
->regulatory_flags
& REGULATORY_CUSTOM_REG
),
2287 "wiphy should have REGULATORY_CUSTOM_REG\n");
2288 wiphy
->regulatory_flags
|= REGULATORY_CUSTOM_REG
;
2290 for (band
= 0; band
< NUM_NL80211_BANDS
; band
++) {
2291 if (!wiphy
->bands
[band
])
2293 handle_band_custom(wiphy
, wiphy
->bands
[band
], regd
);
2298 * no point in calling this if it won't have any effect
2299 * on your device's supported bands.
2301 WARN_ON(!bands_set
);
2303 EXPORT_SYMBOL(wiphy_apply_custom_regulatory
);
2305 static void reg_set_request_processed(void)
2307 bool need_more_processing
= false;
2308 struct regulatory_request
*lr
= get_last_request();
2310 lr
->processed
= true;
2312 spin_lock(®_requests_lock
);
2313 if (!list_empty(®_requests_list
))
2314 need_more_processing
= true;
2315 spin_unlock(®_requests_lock
);
2317 cancel_crda_timeout();
2319 if (need_more_processing
)
2320 schedule_work(®_work
);
2324 * reg_process_hint_core - process core regulatory requests
2325 * @pending_request: a pending core regulatory request
2327 * The wireless subsystem can use this function to process
2328 * a regulatory request issued by the regulatory core.
2330 static enum reg_request_treatment
2331 reg_process_hint_core(struct regulatory_request
*core_request
)
2333 if (reg_query_database(core_request
)) {
2334 core_request
->intersect
= false;
2335 core_request
->processed
= false;
2336 reg_update_last_request(core_request
);
2340 return REG_REQ_IGNORE
;
2343 static enum reg_request_treatment
2344 __reg_process_hint_user(struct regulatory_request
*user_request
)
2346 struct regulatory_request
*lr
= get_last_request();
2348 if (reg_request_cell_base(user_request
))
2349 return reg_ignore_cell_hint(user_request
);
2351 if (reg_request_cell_base(lr
))
2352 return REG_REQ_IGNORE
;
2354 if (lr
->initiator
== NL80211_REGDOM_SET_BY_COUNTRY_IE
)
2355 return REG_REQ_INTERSECT
;
2357 * If the user knows better the user should set the regdom
2358 * to their country before the IE is picked up
2360 if (lr
->initiator
== NL80211_REGDOM_SET_BY_USER
&&
2362 return REG_REQ_IGNORE
;
2364 * Process user requests only after previous user/driver/core
2365 * requests have been processed
2367 if ((lr
->initiator
== NL80211_REGDOM_SET_BY_CORE
||
2368 lr
->initiator
== NL80211_REGDOM_SET_BY_DRIVER
||
2369 lr
->initiator
== NL80211_REGDOM_SET_BY_USER
) &&
2370 regdom_changes(lr
->alpha2
))
2371 return REG_REQ_IGNORE
;
2373 if (!regdom_changes(user_request
->alpha2
))
2374 return REG_REQ_ALREADY_SET
;
2380 * reg_process_hint_user - process user regulatory requests
2381 * @user_request: a pending user regulatory request
2383 * The wireless subsystem can use this function to process
2384 * a regulatory request initiated by userspace.
2386 static enum reg_request_treatment
2387 reg_process_hint_user(struct regulatory_request
*user_request
)
2389 enum reg_request_treatment treatment
;
2391 treatment
= __reg_process_hint_user(user_request
);
2392 if (treatment
== REG_REQ_IGNORE
||
2393 treatment
== REG_REQ_ALREADY_SET
)
2394 return REG_REQ_IGNORE
;
2396 user_request
->intersect
= treatment
== REG_REQ_INTERSECT
;
2397 user_request
->processed
= false;
2399 if (reg_query_database(user_request
)) {
2400 reg_update_last_request(user_request
);
2401 user_alpha2
[0] = user_request
->alpha2
[0];
2402 user_alpha2
[1] = user_request
->alpha2
[1];
2406 return REG_REQ_IGNORE
;
2409 static enum reg_request_treatment
2410 __reg_process_hint_driver(struct regulatory_request
*driver_request
)
2412 struct regulatory_request
*lr
= get_last_request();
2414 if (lr
->initiator
== NL80211_REGDOM_SET_BY_CORE
) {
2415 if (regdom_changes(driver_request
->alpha2
))
2417 return REG_REQ_ALREADY_SET
;
2421 * This would happen if you unplug and plug your card
2422 * back in or if you add a new device for which the previously
2423 * loaded card also agrees on the regulatory domain.
2425 if (lr
->initiator
== NL80211_REGDOM_SET_BY_DRIVER
&&
2426 !regdom_changes(driver_request
->alpha2
))
2427 return REG_REQ_ALREADY_SET
;
2429 return REG_REQ_INTERSECT
;
2433 * reg_process_hint_driver - process driver regulatory requests
2434 * @driver_request: a pending driver regulatory request
2436 * The wireless subsystem can use this function to process
2437 * a regulatory request issued by an 802.11 driver.
2439 * Returns one of the different reg request treatment values.
2441 static enum reg_request_treatment
2442 reg_process_hint_driver(struct wiphy
*wiphy
,
2443 struct regulatory_request
*driver_request
)
2445 const struct ieee80211_regdomain
*regd
, *tmp
;
2446 enum reg_request_treatment treatment
;
2448 treatment
= __reg_process_hint_driver(driver_request
);
2450 switch (treatment
) {
2453 case REG_REQ_IGNORE
:
2454 return REG_REQ_IGNORE
;
2455 case REG_REQ_INTERSECT
:
2456 case REG_REQ_ALREADY_SET
:
2457 regd
= reg_copy_regd(get_cfg80211_regdom());
2459 return REG_REQ_IGNORE
;
2461 tmp
= get_wiphy_regdom(wiphy
);
2462 rcu_assign_pointer(wiphy
->regd
, regd
);
2463 rcu_free_regdom(tmp
);
2467 driver_request
->intersect
= treatment
== REG_REQ_INTERSECT
;
2468 driver_request
->processed
= false;
2471 * Since CRDA will not be called in this case as we already
2472 * have applied the requested regulatory domain before we just
2473 * inform userspace we have processed the request
2475 if (treatment
== REG_REQ_ALREADY_SET
) {
2476 nl80211_send_reg_change_event(driver_request
);
2477 reg_update_last_request(driver_request
);
2478 reg_set_request_processed();
2479 return REG_REQ_ALREADY_SET
;
2482 if (reg_query_database(driver_request
)) {
2483 reg_update_last_request(driver_request
);
2487 return REG_REQ_IGNORE
;
2490 static enum reg_request_treatment
2491 __reg_process_hint_country_ie(struct wiphy
*wiphy
,
2492 struct regulatory_request
*country_ie_request
)
2494 struct wiphy
*last_wiphy
= NULL
;
2495 struct regulatory_request
*lr
= get_last_request();
2497 if (reg_request_cell_base(lr
)) {
2498 /* Trust a Cell base station over the AP's country IE */
2499 if (regdom_changes(country_ie_request
->alpha2
))
2500 return REG_REQ_IGNORE
;
2501 return REG_REQ_ALREADY_SET
;
2503 if (wiphy
->regulatory_flags
& REGULATORY_COUNTRY_IE_IGNORE
)
2504 return REG_REQ_IGNORE
;
2507 if (unlikely(!is_an_alpha2(country_ie_request
->alpha2
)))
2510 if (lr
->initiator
!= NL80211_REGDOM_SET_BY_COUNTRY_IE
)
2513 last_wiphy
= wiphy_idx_to_wiphy(lr
->wiphy_idx
);
2515 if (last_wiphy
!= wiphy
) {
2517 * Two cards with two APs claiming different
2518 * Country IE alpha2s. We could
2519 * intersect them, but that seems unlikely
2520 * to be correct. Reject second one for now.
2522 if (regdom_changes(country_ie_request
->alpha2
))
2523 return REG_REQ_IGNORE
;
2524 return REG_REQ_ALREADY_SET
;
2527 if (regdom_changes(country_ie_request
->alpha2
))
2529 return REG_REQ_ALREADY_SET
;
2533 * reg_process_hint_country_ie - process regulatory requests from country IEs
2534 * @country_ie_request: a regulatory request from a country IE
2536 * The wireless subsystem can use this function to process
2537 * a regulatory request issued by a country Information Element.
2539 * Returns one of the different reg request treatment values.
2541 static enum reg_request_treatment
2542 reg_process_hint_country_ie(struct wiphy
*wiphy
,
2543 struct regulatory_request
*country_ie_request
)
2545 enum reg_request_treatment treatment
;
2547 treatment
= __reg_process_hint_country_ie(wiphy
, country_ie_request
);
2549 switch (treatment
) {
2552 case REG_REQ_IGNORE
:
2553 return REG_REQ_IGNORE
;
2554 case REG_REQ_ALREADY_SET
:
2555 reg_free_request(country_ie_request
);
2556 return REG_REQ_ALREADY_SET
;
2557 case REG_REQ_INTERSECT
:
2559 * This doesn't happen yet, not sure we
2560 * ever want to support it for this case.
2562 WARN_ONCE(1, "Unexpected intersection for country elements");
2563 return REG_REQ_IGNORE
;
2566 country_ie_request
->intersect
= false;
2567 country_ie_request
->processed
= false;
2569 if (reg_query_database(country_ie_request
)) {
2570 reg_update_last_request(country_ie_request
);
2574 return REG_REQ_IGNORE
;
2577 bool reg_dfs_domain_same(struct wiphy
*wiphy1
, struct wiphy
*wiphy2
)
2579 const struct ieee80211_regdomain
*wiphy1_regd
= NULL
;
2580 const struct ieee80211_regdomain
*wiphy2_regd
= NULL
;
2581 const struct ieee80211_regdomain
*cfg80211_regd
= NULL
;
2582 bool dfs_domain_same
;
2586 cfg80211_regd
= rcu_dereference(cfg80211_regdomain
);
2587 wiphy1_regd
= rcu_dereference(wiphy1
->regd
);
2589 wiphy1_regd
= cfg80211_regd
;
2591 wiphy2_regd
= rcu_dereference(wiphy2
->regd
);
2593 wiphy2_regd
= cfg80211_regd
;
2595 dfs_domain_same
= wiphy1_regd
->dfs_region
== wiphy2_regd
->dfs_region
;
2599 return dfs_domain_same
;
2602 static void reg_copy_dfs_chan_state(struct ieee80211_channel
*dst_chan
,
2603 struct ieee80211_channel
*src_chan
)
2605 if (!(dst_chan
->flags
& IEEE80211_CHAN_RADAR
) ||
2606 !(src_chan
->flags
& IEEE80211_CHAN_RADAR
))
2609 if (dst_chan
->flags
& IEEE80211_CHAN_DISABLED
||
2610 src_chan
->flags
& IEEE80211_CHAN_DISABLED
)
2613 if (src_chan
->center_freq
== dst_chan
->center_freq
&&
2614 dst_chan
->dfs_state
== NL80211_DFS_USABLE
) {
2615 dst_chan
->dfs_state
= src_chan
->dfs_state
;
2616 dst_chan
->dfs_state_entered
= src_chan
->dfs_state_entered
;
2620 static void wiphy_share_dfs_chan_state(struct wiphy
*dst_wiphy
,
2621 struct wiphy
*src_wiphy
)
2623 struct ieee80211_supported_band
*src_sband
, *dst_sband
;
2624 struct ieee80211_channel
*src_chan
, *dst_chan
;
2627 if (!reg_dfs_domain_same(dst_wiphy
, src_wiphy
))
2630 for (band
= 0; band
< NUM_NL80211_BANDS
; band
++) {
2631 dst_sband
= dst_wiphy
->bands
[band
];
2632 src_sband
= src_wiphy
->bands
[band
];
2633 if (!dst_sband
|| !src_sband
)
2636 for (i
= 0; i
< dst_sband
->n_channels
; i
++) {
2637 dst_chan
= &dst_sband
->channels
[i
];
2638 for (j
= 0; j
< src_sband
->n_channels
; j
++) {
2639 src_chan
= &src_sband
->channels
[j
];
2640 reg_copy_dfs_chan_state(dst_chan
, src_chan
);
2646 static void wiphy_all_share_dfs_chan_state(struct wiphy
*wiphy
)
2648 struct cfg80211_registered_device
*rdev
;
2652 list_for_each_entry(rdev
, &cfg80211_rdev_list
, list
) {
2653 if (wiphy
== &rdev
->wiphy
)
2655 wiphy_share_dfs_chan_state(wiphy
, &rdev
->wiphy
);
2659 /* This processes *all* regulatory hints */
2660 static void reg_process_hint(struct regulatory_request
*reg_request
)
2662 struct wiphy
*wiphy
= NULL
;
2663 enum reg_request_treatment treatment
;
2665 if (reg_request
->wiphy_idx
!= WIPHY_IDX_INVALID
)
2666 wiphy
= wiphy_idx_to_wiphy(reg_request
->wiphy_idx
);
2668 switch (reg_request
->initiator
) {
2669 case NL80211_REGDOM_SET_BY_CORE
:
2670 treatment
= reg_process_hint_core(reg_request
);
2672 case NL80211_REGDOM_SET_BY_USER
:
2673 treatment
= reg_process_hint_user(reg_request
);
2675 case NL80211_REGDOM_SET_BY_DRIVER
:
2678 treatment
= reg_process_hint_driver(wiphy
, reg_request
);
2680 case NL80211_REGDOM_SET_BY_COUNTRY_IE
:
2683 treatment
= reg_process_hint_country_ie(wiphy
, reg_request
);
2686 WARN(1, "invalid initiator %d\n", reg_request
->initiator
);
2690 if (treatment
== REG_REQ_IGNORE
)
2693 WARN(treatment
!= REG_REQ_OK
&& treatment
!= REG_REQ_ALREADY_SET
,
2694 "unexpected treatment value %d\n", treatment
);
2696 /* This is required so that the orig_* parameters are saved.
2697 * NOTE: treatment must be set for any case that reaches here!
2699 if (treatment
== REG_REQ_ALREADY_SET
&& wiphy
&&
2700 wiphy
->regulatory_flags
& REGULATORY_STRICT_REG
) {
2701 wiphy_update_regulatory(wiphy
, reg_request
->initiator
);
2702 wiphy_all_share_dfs_chan_state(wiphy
);
2703 reg_check_channels();
2709 reg_free_request(reg_request
);
2712 static void notify_self_managed_wiphys(struct regulatory_request
*request
)
2714 struct cfg80211_registered_device
*rdev
;
2715 struct wiphy
*wiphy
;
2717 list_for_each_entry(rdev
, &cfg80211_rdev_list
, list
) {
2718 wiphy
= &rdev
->wiphy
;
2719 if (wiphy
->regulatory_flags
& REGULATORY_WIPHY_SELF_MANAGED
&&
2720 request
->initiator
== NL80211_REGDOM_SET_BY_USER
&&
2721 request
->user_reg_hint_type
==
2722 NL80211_USER_REG_HINT_CELL_BASE
)
2723 reg_call_notifier(wiphy
, request
);
2728 * Processes regulatory hints, this is all the NL80211_REGDOM_SET_BY_*
2729 * Regulatory hints come on a first come first serve basis and we
2730 * must process each one atomically.
2732 static void reg_process_pending_hints(void)
2734 struct regulatory_request
*reg_request
, *lr
;
2736 lr
= get_last_request();
2738 /* When last_request->processed becomes true this will be rescheduled */
2739 if (lr
&& !lr
->processed
) {
2740 reg_process_hint(lr
);
2744 spin_lock(®_requests_lock
);
2746 if (list_empty(®_requests_list
)) {
2747 spin_unlock(®_requests_lock
);
2751 reg_request
= list_first_entry(®_requests_list
,
2752 struct regulatory_request
,
2754 list_del_init(®_request
->list
);
2756 spin_unlock(®_requests_lock
);
2758 notify_self_managed_wiphys(reg_request
);
2760 reg_process_hint(reg_request
);
2762 lr
= get_last_request();
2764 spin_lock(®_requests_lock
);
2765 if (!list_empty(®_requests_list
) && lr
&& lr
->processed
)
2766 schedule_work(®_work
);
2767 spin_unlock(®_requests_lock
);
2770 /* Processes beacon hints -- this has nothing to do with country IEs */
2771 static void reg_process_pending_beacon_hints(void)
2773 struct cfg80211_registered_device
*rdev
;
2774 struct reg_beacon
*pending_beacon
, *tmp
;
2776 /* This goes through the _pending_ beacon list */
2777 spin_lock_bh(®_pending_beacons_lock
);
2779 list_for_each_entry_safe(pending_beacon
, tmp
,
2780 ®_pending_beacons
, list
) {
2781 list_del_init(&pending_beacon
->list
);
2783 /* Applies the beacon hint to current wiphys */
2784 list_for_each_entry(rdev
, &cfg80211_rdev_list
, list
)
2785 wiphy_update_new_beacon(&rdev
->wiphy
, pending_beacon
);
2787 /* Remembers the beacon hint for new wiphys or reg changes */
2788 list_add_tail(&pending_beacon
->list
, ®_beacon_list
);
2791 spin_unlock_bh(®_pending_beacons_lock
);
2794 static void reg_process_self_managed_hints(void)
2796 struct cfg80211_registered_device
*rdev
;
2797 struct wiphy
*wiphy
;
2798 const struct ieee80211_regdomain
*tmp
;
2799 const struct ieee80211_regdomain
*regd
;
2800 enum nl80211_band band
;
2801 struct regulatory_request request
= {};
2803 list_for_each_entry(rdev
, &cfg80211_rdev_list
, list
) {
2804 wiphy
= &rdev
->wiphy
;
2806 spin_lock(®_requests_lock
);
2807 regd
= rdev
->requested_regd
;
2808 rdev
->requested_regd
= NULL
;
2809 spin_unlock(®_requests_lock
);
2814 tmp
= get_wiphy_regdom(wiphy
);
2815 rcu_assign_pointer(wiphy
->regd
, regd
);
2816 rcu_free_regdom(tmp
);
2818 for (band
= 0; band
< NUM_NL80211_BANDS
; band
++)
2819 handle_band_custom(wiphy
, wiphy
->bands
[band
], regd
);
2821 reg_process_ht_flags(wiphy
);
2823 request
.wiphy_idx
= get_wiphy_idx(wiphy
);
2824 request
.alpha2
[0] = regd
->alpha2
[0];
2825 request
.alpha2
[1] = regd
->alpha2
[1];
2826 request
.initiator
= NL80211_REGDOM_SET_BY_DRIVER
;
2828 nl80211_send_wiphy_reg_change_event(&request
);
2831 reg_check_channels();
2834 static void reg_todo(struct work_struct
*work
)
2837 reg_process_pending_hints();
2838 reg_process_pending_beacon_hints();
2839 reg_process_self_managed_hints();
2843 static void queue_regulatory_request(struct regulatory_request
*request
)
2845 request
->alpha2
[0] = toupper(request
->alpha2
[0]);
2846 request
->alpha2
[1] = toupper(request
->alpha2
[1]);
2848 spin_lock(®_requests_lock
);
2849 list_add_tail(&request
->list
, ®_requests_list
);
2850 spin_unlock(®_requests_lock
);
2852 schedule_work(®_work
);
2856 * Core regulatory hint -- happens during cfg80211_init()
2857 * and when we restore regulatory settings.
2859 static int regulatory_hint_core(const char *alpha2
)
2861 struct regulatory_request
*request
;
2863 request
= kzalloc(sizeof(struct regulatory_request
), GFP_KERNEL
);
2867 request
->alpha2
[0] = alpha2
[0];
2868 request
->alpha2
[1] = alpha2
[1];
2869 request
->initiator
= NL80211_REGDOM_SET_BY_CORE
;
2871 queue_regulatory_request(request
);
2877 int regulatory_hint_user(const char *alpha2
,
2878 enum nl80211_user_reg_hint_type user_reg_hint_type
)
2880 struct regulatory_request
*request
;
2882 if (WARN_ON(!alpha2
))
2885 request
= kzalloc(sizeof(struct regulatory_request
), GFP_KERNEL
);
2889 request
->wiphy_idx
= WIPHY_IDX_INVALID
;
2890 request
->alpha2
[0] = alpha2
[0];
2891 request
->alpha2
[1] = alpha2
[1];
2892 request
->initiator
= NL80211_REGDOM_SET_BY_USER
;
2893 request
->user_reg_hint_type
= user_reg_hint_type
;
2895 /* Allow calling CRDA again */
2896 reset_crda_timeouts();
2898 queue_regulatory_request(request
);
2903 int regulatory_hint_indoor(bool is_indoor
, u32 portid
)
2905 spin_lock(®_indoor_lock
);
2907 /* It is possible that more than one user space process is trying to
2908 * configure the indoor setting. To handle such cases, clear the indoor
2909 * setting in case that some process does not think that the device
2910 * is operating in an indoor environment. In addition, if a user space
2911 * process indicates that it is controlling the indoor setting, save its
2912 * portid, i.e., make it the owner.
2914 reg_is_indoor
= is_indoor
;
2915 if (reg_is_indoor
) {
2916 if (!reg_is_indoor_portid
)
2917 reg_is_indoor_portid
= portid
;
2919 reg_is_indoor_portid
= 0;
2922 spin_unlock(®_indoor_lock
);
2925 reg_check_channels();
2930 void regulatory_netlink_notify(u32 portid
)
2932 spin_lock(®_indoor_lock
);
2934 if (reg_is_indoor_portid
!= portid
) {
2935 spin_unlock(®_indoor_lock
);
2939 reg_is_indoor
= false;
2940 reg_is_indoor_portid
= 0;
2942 spin_unlock(®_indoor_lock
);
2944 reg_check_channels();
2948 int regulatory_hint(struct wiphy
*wiphy
, const char *alpha2
)
2950 struct regulatory_request
*request
;
2952 if (WARN_ON(!alpha2
|| !wiphy
))
2955 wiphy
->regulatory_flags
&= ~REGULATORY_CUSTOM_REG
;
2957 request
= kzalloc(sizeof(struct regulatory_request
), GFP_KERNEL
);
2961 request
->wiphy_idx
= get_wiphy_idx(wiphy
);
2963 request
->alpha2
[0] = alpha2
[0];
2964 request
->alpha2
[1] = alpha2
[1];
2965 request
->initiator
= NL80211_REGDOM_SET_BY_DRIVER
;
2967 /* Allow calling CRDA again */
2968 reset_crda_timeouts();
2970 queue_regulatory_request(request
);
2974 EXPORT_SYMBOL(regulatory_hint
);
2976 void regulatory_hint_country_ie(struct wiphy
*wiphy
, enum nl80211_band band
,
2977 const u8
*country_ie
, u8 country_ie_len
)
2980 enum environment_cap env
= ENVIRON_ANY
;
2981 struct regulatory_request
*request
= NULL
, *lr
;
2983 /* IE len must be evenly divisible by 2 */
2984 if (country_ie_len
& 0x01)
2987 if (country_ie_len
< IEEE80211_COUNTRY_IE_MIN_LEN
)
2990 request
= kzalloc(sizeof(*request
), GFP_KERNEL
);
2994 alpha2
[0] = country_ie
[0];
2995 alpha2
[1] = country_ie
[1];
2997 if (country_ie
[2] == 'I')
2998 env
= ENVIRON_INDOOR
;
2999 else if (country_ie
[2] == 'O')
3000 env
= ENVIRON_OUTDOOR
;
3003 lr
= get_last_request();
3009 * We will run this only upon a successful connection on cfg80211.
3010 * We leave conflict resolution to the workqueue, where can hold
3013 if (lr
->initiator
== NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
3014 lr
->wiphy_idx
!= WIPHY_IDX_INVALID
)
3017 request
->wiphy_idx
= get_wiphy_idx(wiphy
);
3018 request
->alpha2
[0] = alpha2
[0];
3019 request
->alpha2
[1] = alpha2
[1];
3020 request
->initiator
= NL80211_REGDOM_SET_BY_COUNTRY_IE
;
3021 request
->country_ie_env
= env
;
3023 /* Allow calling CRDA again */
3024 reset_crda_timeouts();
3026 queue_regulatory_request(request
);
3033 static void restore_alpha2(char *alpha2
, bool reset_user
)
3035 /* indicates there is no alpha2 to consider for restoration */
3039 /* The user setting has precedence over the module parameter */
3040 if (is_user_regdom_saved()) {
3041 /* Unless we're asked to ignore it and reset it */
3043 pr_debug("Restoring regulatory settings including user preference\n");
3044 user_alpha2
[0] = '9';
3045 user_alpha2
[1] = '7';
3048 * If we're ignoring user settings, we still need to
3049 * check the module parameter to ensure we put things
3050 * back as they were for a full restore.
3052 if (!is_world_regdom(ieee80211_regdom
)) {
3053 pr_debug("Keeping preference on module parameter ieee80211_regdom: %c%c\n",
3054 ieee80211_regdom
[0], ieee80211_regdom
[1]);
3055 alpha2
[0] = ieee80211_regdom
[0];
3056 alpha2
[1] = ieee80211_regdom
[1];
3059 pr_debug("Restoring regulatory settings while preserving user preference for: %c%c\n",
3060 user_alpha2
[0], user_alpha2
[1]);
3061 alpha2
[0] = user_alpha2
[0];
3062 alpha2
[1] = user_alpha2
[1];
3064 } else if (!is_world_regdom(ieee80211_regdom
)) {
3065 pr_debug("Keeping preference on module parameter ieee80211_regdom: %c%c\n",
3066 ieee80211_regdom
[0], ieee80211_regdom
[1]);
3067 alpha2
[0] = ieee80211_regdom
[0];
3068 alpha2
[1] = ieee80211_regdom
[1];
3070 pr_debug("Restoring regulatory settings\n");
3073 static void restore_custom_reg_settings(struct wiphy
*wiphy
)
3075 struct ieee80211_supported_band
*sband
;
3076 enum nl80211_band band
;
3077 struct ieee80211_channel
*chan
;
3080 for (band
= 0; band
< NUM_NL80211_BANDS
; band
++) {
3081 sband
= wiphy
->bands
[band
];
3084 for (i
= 0; i
< sband
->n_channels
; i
++) {
3085 chan
= &sband
->channels
[i
];
3086 chan
->flags
= chan
->orig_flags
;
3087 chan
->max_antenna_gain
= chan
->orig_mag
;
3088 chan
->max_power
= chan
->orig_mpwr
;
3089 chan
->beacon_found
= false;
3095 * Restoring regulatory settings involves ingoring any
3096 * possibly stale country IE information and user regulatory
3097 * settings if so desired, this includes any beacon hints
3098 * learned as we could have traveled outside to another country
3099 * after disconnection. To restore regulatory settings we do
3100 * exactly what we did at bootup:
3102 * - send a core regulatory hint
3103 * - send a user regulatory hint if applicable
3105 * Device drivers that send a regulatory hint for a specific country
3106 * keep their own regulatory domain on wiphy->regd so that does does
3107 * not need to be remembered.
3109 static void restore_regulatory_settings(bool reset_user
)
3112 char world_alpha2
[2];
3113 struct reg_beacon
*reg_beacon
, *btmp
;
3114 LIST_HEAD(tmp_reg_req_list
);
3115 struct cfg80211_registered_device
*rdev
;
3120 * Clear the indoor setting in case that it is not controlled by user
3121 * space, as otherwise there is no guarantee that the device is still
3122 * operating in an indoor environment.
3124 spin_lock(®_indoor_lock
);
3125 if (reg_is_indoor
&& !reg_is_indoor_portid
) {
3126 reg_is_indoor
= false;
3127 reg_check_channels();
3129 spin_unlock(®_indoor_lock
);
3131 reset_regdomains(true, &world_regdom
);
3132 restore_alpha2(alpha2
, reset_user
);
3135 * If there's any pending requests we simply
3136 * stash them to a temporary pending queue and
3137 * add then after we've restored regulatory
3140 spin_lock(®_requests_lock
);
3141 list_splice_tail_init(®_requests_list
, &tmp_reg_req_list
);
3142 spin_unlock(®_requests_lock
);
3144 /* Clear beacon hints */
3145 spin_lock_bh(®_pending_beacons_lock
);
3146 list_for_each_entry_safe(reg_beacon
, btmp
, ®_pending_beacons
, list
) {
3147 list_del(®_beacon
->list
);
3150 spin_unlock_bh(®_pending_beacons_lock
);
3152 list_for_each_entry_safe(reg_beacon
, btmp
, ®_beacon_list
, list
) {
3153 list_del(®_beacon
->list
);
3157 /* First restore to the basic regulatory settings */
3158 world_alpha2
[0] = cfg80211_world_regdom
->alpha2
[0];
3159 world_alpha2
[1] = cfg80211_world_regdom
->alpha2
[1];
3161 list_for_each_entry(rdev
, &cfg80211_rdev_list
, list
) {
3162 if (rdev
->wiphy
.regulatory_flags
& REGULATORY_WIPHY_SELF_MANAGED
)
3164 if (rdev
->wiphy
.regulatory_flags
& REGULATORY_CUSTOM_REG
)
3165 restore_custom_reg_settings(&rdev
->wiphy
);
3168 regulatory_hint_core(world_alpha2
);
3171 * This restores the ieee80211_regdom module parameter
3172 * preference or the last user requested regulatory
3173 * settings, user regulatory settings takes precedence.
3175 if (is_an_alpha2(alpha2
))
3176 regulatory_hint_user(alpha2
, NL80211_USER_REG_HINT_USER
);
3178 spin_lock(®_requests_lock
);
3179 list_splice_tail_init(&tmp_reg_req_list
, ®_requests_list
);
3180 spin_unlock(®_requests_lock
);
3182 pr_debug("Kicking the queue\n");
3184 schedule_work(®_work
);
3187 void regulatory_hint_disconnect(void)
3189 pr_debug("All devices are disconnected, going to restore regulatory settings\n");
3190 restore_regulatory_settings(false);
3193 static bool freq_is_chan_12_13_14(u16 freq
)
3195 if (freq
== ieee80211_channel_to_frequency(12, NL80211_BAND_2GHZ
) ||
3196 freq
== ieee80211_channel_to_frequency(13, NL80211_BAND_2GHZ
) ||
3197 freq
== ieee80211_channel_to_frequency(14, NL80211_BAND_2GHZ
))
3202 static bool pending_reg_beacon(struct ieee80211_channel
*beacon_chan
)
3204 struct reg_beacon
*pending_beacon
;
3206 list_for_each_entry(pending_beacon
, ®_pending_beacons
, list
)
3207 if (beacon_chan
->center_freq
==
3208 pending_beacon
->chan
.center_freq
)
3213 int regulatory_hint_found_beacon(struct wiphy
*wiphy
,
3214 struct ieee80211_channel
*beacon_chan
,
3217 struct reg_beacon
*reg_beacon
;
3220 if (beacon_chan
->beacon_found
||
3221 beacon_chan
->flags
& IEEE80211_CHAN_RADAR
||
3222 (beacon_chan
->band
== NL80211_BAND_2GHZ
&&
3223 !freq_is_chan_12_13_14(beacon_chan
->center_freq
)))
3226 spin_lock_bh(®_pending_beacons_lock
);
3227 processing
= pending_reg_beacon(beacon_chan
);
3228 spin_unlock_bh(®_pending_beacons_lock
);
3233 reg_beacon
= kzalloc(sizeof(struct reg_beacon
), gfp
);
3237 pr_debug("Found new beacon on frequency: %d MHz (Ch %d) on %s\n",
3238 beacon_chan
->center_freq
,
3239 ieee80211_frequency_to_channel(beacon_chan
->center_freq
),
3242 memcpy(®_beacon
->chan
, beacon_chan
,
3243 sizeof(struct ieee80211_channel
));
3246 * Since we can be called from BH or and non-BH context
3247 * we must use spin_lock_bh()
3249 spin_lock_bh(®_pending_beacons_lock
);
3250 list_add_tail(®_beacon
->list
, ®_pending_beacons
);
3251 spin_unlock_bh(®_pending_beacons_lock
);
3253 schedule_work(®_work
);
3258 static void print_rd_rules(const struct ieee80211_regdomain
*rd
)
3261 const struct ieee80211_reg_rule
*reg_rule
= NULL
;
3262 const struct ieee80211_freq_range
*freq_range
= NULL
;
3263 const struct ieee80211_power_rule
*power_rule
= NULL
;
3264 char bw
[32], cac_time
[32];
3266 pr_debug(" (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp), (dfs_cac_time)\n");
3268 for (i
= 0; i
< rd
->n_reg_rules
; i
++) {
3269 reg_rule
= &rd
->reg_rules
[i
];
3270 freq_range
= ®_rule
->freq_range
;
3271 power_rule
= ®_rule
->power_rule
;
3273 if (reg_rule
->flags
& NL80211_RRF_AUTO_BW
)
3274 snprintf(bw
, sizeof(bw
), "%d KHz, %d KHz AUTO",
3275 freq_range
->max_bandwidth_khz
,
3276 reg_get_max_bandwidth(rd
, reg_rule
));
3278 snprintf(bw
, sizeof(bw
), "%d KHz",
3279 freq_range
->max_bandwidth_khz
);
3281 if (reg_rule
->flags
& NL80211_RRF_DFS
)
3282 scnprintf(cac_time
, sizeof(cac_time
), "%u s",
3283 reg_rule
->dfs_cac_ms
/1000);
3285 scnprintf(cac_time
, sizeof(cac_time
), "N/A");
3289 * There may not be documentation for max antenna gain
3290 * in certain regions
3292 if (power_rule
->max_antenna_gain
)
3293 pr_debug(" (%d KHz - %d KHz @ %s), (%d mBi, %d mBm), (%s)\n",
3294 freq_range
->start_freq_khz
,
3295 freq_range
->end_freq_khz
,
3297 power_rule
->max_antenna_gain
,
3298 power_rule
->max_eirp
,
3301 pr_debug(" (%d KHz - %d KHz @ %s), (N/A, %d mBm), (%s)\n",
3302 freq_range
->start_freq_khz
,
3303 freq_range
->end_freq_khz
,
3305 power_rule
->max_eirp
,
3310 bool reg_supported_dfs_region(enum nl80211_dfs_regions dfs_region
)
3312 switch (dfs_region
) {
3313 case NL80211_DFS_UNSET
:
3314 case NL80211_DFS_FCC
:
3315 case NL80211_DFS_ETSI
:
3316 case NL80211_DFS_JP
:
3319 pr_debug("Ignoring unknown DFS master region: %d\n", dfs_region
);
3324 static void print_regdomain(const struct ieee80211_regdomain
*rd
)
3326 struct regulatory_request
*lr
= get_last_request();
3328 if (is_intersected_alpha2(rd
->alpha2
)) {
3329 if (lr
->initiator
== NL80211_REGDOM_SET_BY_COUNTRY_IE
) {
3330 struct cfg80211_registered_device
*rdev
;
3331 rdev
= cfg80211_rdev_by_wiphy_idx(lr
->wiphy_idx
);
3333 pr_debug("Current regulatory domain updated by AP to: %c%c\n",
3334 rdev
->country_ie_alpha2
[0],
3335 rdev
->country_ie_alpha2
[1]);
3337 pr_debug("Current regulatory domain intersected:\n");
3339 pr_debug("Current regulatory domain intersected:\n");
3340 } else if (is_world_regdom(rd
->alpha2
)) {
3341 pr_debug("World regulatory domain updated:\n");
3343 if (is_unknown_alpha2(rd
->alpha2
))
3344 pr_debug("Regulatory domain changed to driver built-in settings (unknown country)\n");
3346 if (reg_request_cell_base(lr
))
3347 pr_debug("Regulatory domain changed to country: %c%c by Cell Station\n",
3348 rd
->alpha2
[0], rd
->alpha2
[1]);
3350 pr_debug("Regulatory domain changed to country: %c%c\n",
3351 rd
->alpha2
[0], rd
->alpha2
[1]);
3355 pr_debug(" DFS Master region: %s", reg_dfs_region_str(rd
->dfs_region
));
3359 static void print_regdomain_info(const struct ieee80211_regdomain
*rd
)
3361 pr_debug("Regulatory domain: %c%c\n", rd
->alpha2
[0], rd
->alpha2
[1]);
3365 static int reg_set_rd_core(const struct ieee80211_regdomain
*rd
)
3367 if (!is_world_regdom(rd
->alpha2
))
3369 update_world_regdomain(rd
);
3373 static int reg_set_rd_user(const struct ieee80211_regdomain
*rd
,
3374 struct regulatory_request
*user_request
)
3376 const struct ieee80211_regdomain
*intersected_rd
= NULL
;
3378 if (!regdom_changes(rd
->alpha2
))
3381 if (!is_valid_rd(rd
)) {
3382 pr_err("Invalid regulatory domain detected: %c%c\n",
3383 rd
->alpha2
[0], rd
->alpha2
[1]);
3384 print_regdomain_info(rd
);
3388 if (!user_request
->intersect
) {
3389 reset_regdomains(false, rd
);
3393 intersected_rd
= regdom_intersect(rd
, get_cfg80211_regdom());
3394 if (!intersected_rd
)
3399 reset_regdomains(false, intersected_rd
);
3404 static int reg_set_rd_driver(const struct ieee80211_regdomain
*rd
,
3405 struct regulatory_request
*driver_request
)
3407 const struct ieee80211_regdomain
*regd
;
3408 const struct ieee80211_regdomain
*intersected_rd
= NULL
;
3409 const struct ieee80211_regdomain
*tmp
;
3410 struct wiphy
*request_wiphy
;
3412 if (is_world_regdom(rd
->alpha2
))
3415 if (!regdom_changes(rd
->alpha2
))
3418 if (!is_valid_rd(rd
)) {
3419 pr_err("Invalid regulatory domain detected: %c%c\n",
3420 rd
->alpha2
[0], rd
->alpha2
[1]);
3421 print_regdomain_info(rd
);
3425 request_wiphy
= wiphy_idx_to_wiphy(driver_request
->wiphy_idx
);
3429 if (!driver_request
->intersect
) {
3430 if (request_wiphy
->regd
)
3433 regd
= reg_copy_regd(rd
);
3435 return PTR_ERR(regd
);
3437 rcu_assign_pointer(request_wiphy
->regd
, regd
);
3438 reset_regdomains(false, rd
);
3442 intersected_rd
= regdom_intersect(rd
, get_cfg80211_regdom());
3443 if (!intersected_rd
)
3447 * We can trash what CRDA provided now.
3448 * However if a driver requested this specific regulatory
3449 * domain we keep it for its private use
3451 tmp
= get_wiphy_regdom(request_wiphy
);
3452 rcu_assign_pointer(request_wiphy
->regd
, rd
);
3453 rcu_free_regdom(tmp
);
3457 reset_regdomains(false, intersected_rd
);
3462 static int reg_set_rd_country_ie(const struct ieee80211_regdomain
*rd
,
3463 struct regulatory_request
*country_ie_request
)
3465 struct wiphy
*request_wiphy
;
3467 if (!is_alpha2_set(rd
->alpha2
) && !is_an_alpha2(rd
->alpha2
) &&
3468 !is_unknown_alpha2(rd
->alpha2
))
3472 * Lets only bother proceeding on the same alpha2 if the current
3473 * rd is non static (it means CRDA was present and was used last)
3474 * and the pending request came in from a country IE
3477 if (!is_valid_rd(rd
)) {
3478 pr_err("Invalid regulatory domain detected: %c%c\n",
3479 rd
->alpha2
[0], rd
->alpha2
[1]);
3480 print_regdomain_info(rd
);
3484 request_wiphy
= wiphy_idx_to_wiphy(country_ie_request
->wiphy_idx
);
3488 if (country_ie_request
->intersect
)
3491 reset_regdomains(false, rd
);
3496 * Use this call to set the current regulatory domain. Conflicts with
3497 * multiple drivers can be ironed out later. Caller must've already
3498 * kmalloc'd the rd structure.
3500 int set_regdom(const struct ieee80211_regdomain
*rd
,
3501 enum ieee80211_regd_source regd_src
)
3503 struct regulatory_request
*lr
;
3504 bool user_reset
= false;
3507 if (!reg_is_valid_request(rd
->alpha2
)) {
3512 if (regd_src
== REGD_SOURCE_CRDA
)
3513 reset_crda_timeouts();
3515 lr
= get_last_request();
3517 /* Note that this doesn't update the wiphys, this is done below */
3518 switch (lr
->initiator
) {
3519 case NL80211_REGDOM_SET_BY_CORE
:
3520 r
= reg_set_rd_core(rd
);
3522 case NL80211_REGDOM_SET_BY_USER
:
3523 r
= reg_set_rd_user(rd
, lr
);
3526 case NL80211_REGDOM_SET_BY_DRIVER
:
3527 r
= reg_set_rd_driver(rd
, lr
);
3529 case NL80211_REGDOM_SET_BY_COUNTRY_IE
:
3530 r
= reg_set_rd_country_ie(rd
, lr
);
3533 WARN(1, "invalid initiator %d\n", lr
->initiator
);
3541 reg_set_request_processed();
3544 /* Back to world regulatory in case of errors */
3545 restore_regulatory_settings(user_reset
);
3552 /* This would make this whole thing pointless */
3553 if (WARN_ON(!lr
->intersect
&& rd
!= get_cfg80211_regdom()))
3556 /* update all wiphys now with the new established regulatory domain */
3557 update_all_wiphy_regulatory(lr
->initiator
);
3559 print_regdomain(get_cfg80211_regdom());
3561 nl80211_send_reg_change_event(lr
);
3563 reg_set_request_processed();
3568 static int __regulatory_set_wiphy_regd(struct wiphy
*wiphy
,
3569 struct ieee80211_regdomain
*rd
)
3571 const struct ieee80211_regdomain
*regd
;
3572 const struct ieee80211_regdomain
*prev_regd
;
3573 struct cfg80211_registered_device
*rdev
;
3575 if (WARN_ON(!wiphy
|| !rd
))
3578 if (WARN(!(wiphy
->regulatory_flags
& REGULATORY_WIPHY_SELF_MANAGED
),
3579 "wiphy should have REGULATORY_WIPHY_SELF_MANAGED\n"))
3582 if (WARN(!is_valid_rd(rd
), "Invalid regulatory domain detected\n")) {
3583 print_regdomain_info(rd
);
3587 regd
= reg_copy_regd(rd
);
3589 return PTR_ERR(regd
);
3591 rdev
= wiphy_to_rdev(wiphy
);
3593 spin_lock(®_requests_lock
);
3594 prev_regd
= rdev
->requested_regd
;
3595 rdev
->requested_regd
= regd
;
3596 spin_unlock(®_requests_lock
);
3602 int regulatory_set_wiphy_regd(struct wiphy
*wiphy
,
3603 struct ieee80211_regdomain
*rd
)
3605 int ret
= __regulatory_set_wiphy_regd(wiphy
, rd
);
3610 schedule_work(®_work
);
3613 EXPORT_SYMBOL(regulatory_set_wiphy_regd
);
3615 int regulatory_set_wiphy_regd_sync_rtnl(struct wiphy
*wiphy
,
3616 struct ieee80211_regdomain
*rd
)
3622 ret
= __regulatory_set_wiphy_regd(wiphy
, rd
);
3626 /* process the request immediately */
3627 reg_process_self_managed_hints();
3630 EXPORT_SYMBOL(regulatory_set_wiphy_regd_sync_rtnl
);
3632 void wiphy_regulatory_register(struct wiphy
*wiphy
)
3634 struct regulatory_request
*lr
= get_last_request();
3636 /* self-managed devices ignore beacon hints and country IE */
3637 if (wiphy
->regulatory_flags
& REGULATORY_WIPHY_SELF_MANAGED
) {
3638 wiphy
->regulatory_flags
|= REGULATORY_DISABLE_BEACON_HINTS
|
3639 REGULATORY_COUNTRY_IE_IGNORE
;
3642 * The last request may have been received before this
3643 * registration call. Call the driver notifier if
3644 * initiator is USER and user type is CELL_BASE.
3646 if (lr
->initiator
== NL80211_REGDOM_SET_BY_USER
&&
3647 lr
->user_reg_hint_type
== NL80211_USER_REG_HINT_CELL_BASE
)
3648 reg_call_notifier(wiphy
, lr
);
3651 if (!reg_dev_ignore_cell_hint(wiphy
))
3652 reg_num_devs_support_basehint
++;
3654 wiphy_update_regulatory(wiphy
, lr
->initiator
);
3655 wiphy_all_share_dfs_chan_state(wiphy
);
3658 void wiphy_regulatory_deregister(struct wiphy
*wiphy
)
3660 struct wiphy
*request_wiphy
= NULL
;
3661 struct regulatory_request
*lr
;
3663 lr
= get_last_request();
3665 if (!reg_dev_ignore_cell_hint(wiphy
))
3666 reg_num_devs_support_basehint
--;
3668 rcu_free_regdom(get_wiphy_regdom(wiphy
));
3669 RCU_INIT_POINTER(wiphy
->regd
, NULL
);
3672 request_wiphy
= wiphy_idx_to_wiphy(lr
->wiphy_idx
);
3674 if (!request_wiphy
|| request_wiphy
!= wiphy
)
3677 lr
->wiphy_idx
= WIPHY_IDX_INVALID
;
3678 lr
->country_ie_env
= ENVIRON_ANY
;
3682 * See http://www.fcc.gov/document/5-ghz-unlicensed-spectrum-unii, for
3683 * UNII band definitions
3685 int cfg80211_get_unii(int freq
)
3688 if (freq
>= 5150 && freq
<= 5250)
3692 if (freq
> 5250 && freq
<= 5350)
3696 if (freq
> 5350 && freq
<= 5470)
3700 if (freq
> 5470 && freq
<= 5725)
3704 if (freq
> 5725 && freq
<= 5825)
3710 bool regulatory_indoor_allowed(void)
3712 return reg_is_indoor
;
3715 bool regulatory_pre_cac_allowed(struct wiphy
*wiphy
)
3717 const struct ieee80211_regdomain
*regd
= NULL
;
3718 const struct ieee80211_regdomain
*wiphy_regd
= NULL
;
3719 bool pre_cac_allowed
= false;
3723 regd
= rcu_dereference(cfg80211_regdomain
);
3724 wiphy_regd
= rcu_dereference(wiphy
->regd
);
3726 if (regd
->dfs_region
== NL80211_DFS_ETSI
)
3727 pre_cac_allowed
= true;
3731 return pre_cac_allowed
;
3734 if (regd
->dfs_region
== wiphy_regd
->dfs_region
&&
3735 wiphy_regd
->dfs_region
== NL80211_DFS_ETSI
)
3736 pre_cac_allowed
= true;
3740 return pre_cac_allowed
;
3743 void regulatory_propagate_dfs_state(struct wiphy
*wiphy
,
3744 struct cfg80211_chan_def
*chandef
,
3745 enum nl80211_dfs_state dfs_state
,
3746 enum nl80211_radar_event event
)
3748 struct cfg80211_registered_device
*rdev
;
3752 if (WARN_ON(!cfg80211_chandef_valid(chandef
)))
3755 list_for_each_entry(rdev
, &cfg80211_rdev_list
, list
) {
3756 if (wiphy
== &rdev
->wiphy
)
3759 if (!reg_dfs_domain_same(wiphy
, &rdev
->wiphy
))
3762 if (!ieee80211_get_channel(&rdev
->wiphy
,
3763 chandef
->chan
->center_freq
))
3766 cfg80211_set_dfs_state(&rdev
->wiphy
, chandef
, dfs_state
);
3768 if (event
== NL80211_RADAR_DETECTED
||
3769 event
== NL80211_RADAR_CAC_FINISHED
)
3770 cfg80211_sched_dfs_chan_update(rdev
);
3772 nl80211_radar_notify(rdev
, chandef
, event
, NULL
, GFP_KERNEL
);
3776 static int __init
regulatory_init_db(void)
3780 err
= load_builtin_regdb_keys();
3784 /* We always try to get an update for the static regdomain */
3785 err
= regulatory_hint_core(cfg80211_world_regdom
->alpha2
);
3787 if (err
== -ENOMEM
) {
3788 platform_device_unregister(reg_pdev
);
3792 * N.B. kobject_uevent_env() can fail mainly for when we're out
3793 * memory which is handled and propagated appropriately above
3794 * but it can also fail during a netlink_broadcast() or during
3795 * early boot for call_usermodehelper(). For now treat these
3796 * errors as non-fatal.
3798 pr_err("kobject_uevent_env() was unable to call CRDA during init\n");
3802 * Finally, if the user set the module parameter treat it
3805 if (!is_world_regdom(ieee80211_regdom
))
3806 regulatory_hint_user(ieee80211_regdom
,
3807 NL80211_USER_REG_HINT_USER
);
3812 late_initcall(regulatory_init_db
);
3815 int __init
regulatory_init(void)
3817 reg_pdev
= platform_device_register_simple("regulatory", 0, NULL
, 0);
3818 if (IS_ERR(reg_pdev
))
3819 return PTR_ERR(reg_pdev
);
3821 spin_lock_init(®_requests_lock
);
3822 spin_lock_init(®_pending_beacons_lock
);
3823 spin_lock_init(®_indoor_lock
);
3825 rcu_assign_pointer(cfg80211_regdomain
, cfg80211_world_regdom
);
3827 user_alpha2
[0] = '9';
3828 user_alpha2
[1] = '7';
3831 return regulatory_init_db();
3837 void regulatory_exit(void)
3839 struct regulatory_request
*reg_request
, *tmp
;
3840 struct reg_beacon
*reg_beacon
, *btmp
;
3842 cancel_work_sync(®_work
);
3843 cancel_crda_timeout_sync();
3844 cancel_delayed_work_sync(®_check_chans
);
3846 /* Lock to suppress warnings */
3848 reset_regdomains(true, NULL
);
3851 dev_set_uevent_suppress(®_pdev
->dev
, true);
3853 platform_device_unregister(reg_pdev
);
3855 list_for_each_entry_safe(reg_beacon
, btmp
, ®_pending_beacons
, list
) {
3856 list_del(®_beacon
->list
);
3860 list_for_each_entry_safe(reg_beacon
, btmp
, ®_beacon_list
, list
) {
3861 list_del(®_beacon
->list
);
3865 list_for_each_entry_safe(reg_request
, tmp
, ®_requests_list
, list
) {
3866 list_del(®_request
->list
);
3870 if (!IS_ERR_OR_NULL(regdb
))
3873 free_regdb_keyring();