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>
7 * Permission to use, copy, modify, and/or distribute this software for any
8 * purpose with or without fee is hereby granted, provided that the above
9 * copyright notice and this permission notice appear in all copies.
11 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
12 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
13 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
14 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
15 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
16 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
17 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
22 * DOC: Wireless regulatory infrastructure
24 * The usual implementation is for a driver to read a device EEPROM to
25 * determine which regulatory domain it should be operating under, then
26 * looking up the allowable channels in a driver-local table and finally
27 * registering those channels in the wiphy structure.
29 * Another set of compliance enforcement is for drivers to use their
30 * own compliance limits which can be stored on the EEPROM. The host
31 * driver or firmware may ensure these are used.
33 * In addition to all this we provide an extra layer of regulatory
34 * conformance. For drivers which do not have any regulatory
35 * information CRDA provides the complete regulatory solution.
36 * For others it provides a community effort on further restrictions
37 * to enhance compliance.
39 * Note: When number of rules --> infinity we will not be able to
40 * index on alpha2 any more, instead we'll probably have to
41 * rely on some SHA1 checksum of the regdomain for example.
45 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
47 #include <linux/kernel.h>
48 #include <linux/export.h>
49 #include <linux/slab.h>
50 #include <linux/list.h>
51 #include <linux/ctype.h>
52 #include <linux/nl80211.h>
53 #include <linux/platform_device.h>
54 #include <linux/moduleparam.h>
55 #include <net/cfg80211.h>
61 #ifdef CONFIG_CFG80211_REG_DEBUG
62 #define REG_DBG_PRINT(format, args...) \
63 printk(KERN_DEBUG pr_fmt(format), ##args)
65 #define REG_DBG_PRINT(args...)
68 enum reg_request_treatment
{
75 static struct regulatory_request core_request_world
= {
76 .initiator
= NL80211_REGDOM_SET_BY_CORE
,
81 .country_ie_env
= ENVIRON_ANY
,
84 /* Receipt of information from last regulatory request */
85 static struct regulatory_request __rcu
*last_request
=
86 (void __rcu
*)&core_request_world
;
88 /* To trigger userspace events */
89 static struct platform_device
*reg_pdev
;
91 static struct device_type reg_device_type
= {
92 .uevent
= reg_device_uevent
,
96 * Central wireless core regulatory domains, we only need two,
97 * the current one and a world regulatory domain in case we have no
98 * information to give us an alpha2.
100 const struct ieee80211_regdomain __rcu
*cfg80211_regdomain
;
103 * Protects static reg.c components:
104 * - cfg80211_regdomain (if not used with RCU)
105 * - cfg80211_world_regdom
106 * - last_request (if not used with RCU)
107 * - reg_num_devs_support_basehint
109 static DEFINE_MUTEX(reg_mutex
);
112 * Number of devices that registered to the core
113 * that support cellular base station regulatory hints
115 static int reg_num_devs_support_basehint
;
117 static inline void assert_reg_lock(void)
119 lockdep_assert_held(®_mutex
);
122 static const struct ieee80211_regdomain
*get_cfg80211_regdom(void)
124 return rcu_dereference_protected(cfg80211_regdomain
,
125 lockdep_is_held(®_mutex
));
128 static const struct ieee80211_regdomain
*get_wiphy_regdom(struct wiphy
*wiphy
)
130 return rcu_dereference_protected(wiphy
->regd
,
131 lockdep_is_held(®_mutex
));
134 static void rcu_free_regdom(const struct ieee80211_regdomain
*r
)
138 kfree_rcu((struct ieee80211_regdomain
*)r
, rcu_head
);
141 static struct regulatory_request
*get_last_request(void)
143 return rcu_dereference_protected(last_request
,
144 lockdep_is_held(®_mutex
));
147 /* Used to queue up regulatory hints */
148 static LIST_HEAD(reg_requests_list
);
149 static spinlock_t reg_requests_lock
;
151 /* Used to queue up beacon hints for review */
152 static LIST_HEAD(reg_pending_beacons
);
153 static spinlock_t reg_pending_beacons_lock
;
155 /* Used to keep track of processed beacon hints */
156 static LIST_HEAD(reg_beacon_list
);
159 struct list_head list
;
160 struct ieee80211_channel chan
;
163 static void reg_todo(struct work_struct
*work
);
164 static DECLARE_WORK(reg_work
, reg_todo
);
166 static void reg_timeout_work(struct work_struct
*work
);
167 static DECLARE_DELAYED_WORK(reg_timeout
, reg_timeout_work
);
169 /* We keep a static world regulatory domain in case of the absence of CRDA */
170 static const struct ieee80211_regdomain world_regdom
= {
174 /* IEEE 802.11b/g, channels 1..11 */
175 REG_RULE(2412-10, 2462+10, 40, 6, 20, 0),
176 /* IEEE 802.11b/g, channels 12..13. */
177 REG_RULE(2467-10, 2472+10, 40, 6, 20,
178 NL80211_RRF_PASSIVE_SCAN
|
179 NL80211_RRF_NO_IBSS
),
180 /* IEEE 802.11 channel 14 - Only JP enables
181 * this and for 802.11b only */
182 REG_RULE(2484-10, 2484+10, 20, 6, 20,
183 NL80211_RRF_PASSIVE_SCAN
|
184 NL80211_RRF_NO_IBSS
|
185 NL80211_RRF_NO_OFDM
),
186 /* IEEE 802.11a, channel 36..48 */
187 REG_RULE(5180-10, 5240+10, 40, 6, 20,
188 NL80211_RRF_PASSIVE_SCAN
|
189 NL80211_RRF_NO_IBSS
),
191 /* NB: 5260 MHz - 5700 MHz requies DFS */
193 /* IEEE 802.11a, channel 149..165 */
194 REG_RULE(5745-10, 5825+10, 40, 6, 20,
195 NL80211_RRF_PASSIVE_SCAN
|
196 NL80211_RRF_NO_IBSS
),
198 /* IEEE 802.11ad (60gHz), channels 1..3 */
199 REG_RULE(56160+2160*1-1080, 56160+2160*3+1080, 2160, 0, 0, 0),
203 static const struct ieee80211_regdomain
*cfg80211_world_regdom
=
206 static char *ieee80211_regdom
= "00";
207 static char user_alpha2
[2];
209 module_param(ieee80211_regdom
, charp
, 0444);
210 MODULE_PARM_DESC(ieee80211_regdom
, "IEEE 802.11 regulatory domain code");
212 static void reset_regdomains(bool full_reset
,
213 const struct ieee80211_regdomain
*new_regdom
)
215 const struct ieee80211_regdomain
*r
;
216 struct regulatory_request
*lr
;
220 r
= get_cfg80211_regdom();
222 /* avoid freeing static information or freeing something twice */
223 if (r
== cfg80211_world_regdom
)
225 if (cfg80211_world_regdom
== &world_regdom
)
226 cfg80211_world_regdom
= NULL
;
227 if (r
== &world_regdom
)
231 rcu_free_regdom(cfg80211_world_regdom
);
233 cfg80211_world_regdom
= &world_regdom
;
234 rcu_assign_pointer(cfg80211_regdomain
, new_regdom
);
239 lr
= get_last_request();
240 if (lr
!= &core_request_world
&& lr
)
241 kfree_rcu(lr
, rcu_head
);
242 rcu_assign_pointer(last_request
, &core_request_world
);
246 * Dynamic world regulatory domain requested by the wireless
247 * core upon initialization
249 static void update_world_regdomain(const struct ieee80211_regdomain
*rd
)
251 struct regulatory_request
*lr
;
253 lr
= get_last_request();
257 reset_regdomains(false, rd
);
259 cfg80211_world_regdom
= rd
;
262 bool is_world_regdom(const char *alpha2
)
266 return alpha2
[0] == '0' && alpha2
[1] == '0';
269 static bool is_alpha2_set(const char *alpha2
)
273 return alpha2
[0] && alpha2
[1];
276 static bool is_unknown_alpha2(const char *alpha2
)
281 * Special case where regulatory domain was built by driver
282 * but a specific alpha2 cannot be determined
284 return alpha2
[0] == '9' && alpha2
[1] == '9';
287 static bool is_intersected_alpha2(const char *alpha2
)
292 * Special case where regulatory domain is the
293 * result of an intersection between two regulatory domain
296 return alpha2
[0] == '9' && alpha2
[1] == '8';
299 static bool is_an_alpha2(const char *alpha2
)
303 return isalpha(alpha2
[0]) && isalpha(alpha2
[1]);
306 static bool alpha2_equal(const char *alpha2_x
, const char *alpha2_y
)
308 if (!alpha2_x
|| !alpha2_y
)
310 return alpha2_x
[0] == alpha2_y
[0] && alpha2_x
[1] == alpha2_y
[1];
313 static bool regdom_changes(const char *alpha2
)
315 const struct ieee80211_regdomain
*r
= get_cfg80211_regdom();
319 return !alpha2_equal(r
->alpha2
, alpha2
);
323 * The NL80211_REGDOM_SET_BY_USER regdom alpha2 is cached, this lets
324 * you know if a valid regulatory hint with NL80211_REGDOM_SET_BY_USER
325 * has ever been issued.
327 static bool is_user_regdom_saved(void)
329 if (user_alpha2
[0] == '9' && user_alpha2
[1] == '7')
332 /* This would indicate a mistake on the design */
333 if (WARN(!is_world_regdom(user_alpha2
) && !is_an_alpha2(user_alpha2
),
334 "Unexpected user alpha2: %c%c\n",
335 user_alpha2
[0], user_alpha2
[1]))
341 static const struct ieee80211_regdomain
*
342 reg_copy_regd(const struct ieee80211_regdomain
*src_regd
)
344 struct ieee80211_regdomain
*regd
;
349 sizeof(struct ieee80211_regdomain
) +
350 src_regd
->n_reg_rules
* sizeof(struct ieee80211_reg_rule
);
352 regd
= kzalloc(size_of_regd
, GFP_KERNEL
);
354 return ERR_PTR(-ENOMEM
);
356 memcpy(regd
, src_regd
, sizeof(struct ieee80211_regdomain
));
358 for (i
= 0; i
< src_regd
->n_reg_rules
; i
++)
359 memcpy(®d
->reg_rules
[i
], &src_regd
->reg_rules
[i
],
360 sizeof(struct ieee80211_reg_rule
));
365 #ifdef CONFIG_CFG80211_INTERNAL_REGDB
366 struct reg_regdb_search_request
{
368 struct list_head list
;
371 static LIST_HEAD(reg_regdb_search_list
);
372 static DEFINE_MUTEX(reg_regdb_search_mutex
);
374 static void reg_regdb_search(struct work_struct
*work
)
376 struct reg_regdb_search_request
*request
;
377 const struct ieee80211_regdomain
*curdom
, *regdom
= NULL
;
380 mutex_lock(&cfg80211_mutex
);
382 mutex_lock(®_regdb_search_mutex
);
383 while (!list_empty(®_regdb_search_list
)) {
384 request
= list_first_entry(®_regdb_search_list
,
385 struct reg_regdb_search_request
,
387 list_del(&request
->list
);
389 for (i
= 0; i
< reg_regdb_size
; i
++) {
390 curdom
= reg_regdb
[i
];
392 if (alpha2_equal(request
->alpha2
, curdom
->alpha2
)) {
393 regdom
= reg_copy_regd(curdom
);
400 mutex_unlock(®_regdb_search_mutex
);
402 if (!IS_ERR_OR_NULL(regdom
))
405 mutex_unlock(&cfg80211_mutex
);
408 static DECLARE_WORK(reg_regdb_work
, reg_regdb_search
);
410 static void reg_regdb_query(const char *alpha2
)
412 struct reg_regdb_search_request
*request
;
417 request
= kzalloc(sizeof(struct reg_regdb_search_request
), GFP_KERNEL
);
421 memcpy(request
->alpha2
, alpha2
, 2);
423 mutex_lock(®_regdb_search_mutex
);
424 list_add_tail(&request
->list
, ®_regdb_search_list
);
425 mutex_unlock(®_regdb_search_mutex
);
427 schedule_work(®_regdb_work
);
430 /* Feel free to add any other sanity checks here */
431 static void reg_regdb_size_check(void)
433 /* We should ideally BUILD_BUG_ON() but then random builds would fail */
434 WARN_ONCE(!reg_regdb_size
, "db.txt is empty, you should update it...");
437 static inline void reg_regdb_size_check(void) {}
438 static inline void reg_regdb_query(const char *alpha2
) {}
439 #endif /* CONFIG_CFG80211_INTERNAL_REGDB */
442 * This lets us keep regulatory code which is updated on a regulatory
443 * basis in userspace. Country information is filled in by
446 static int call_crda(const char *alpha2
)
448 if (!is_world_regdom((char *) alpha2
))
449 pr_info("Calling CRDA for country: %c%c\n",
450 alpha2
[0], alpha2
[1]);
452 pr_info("Calling CRDA to update world regulatory domain\n");
454 /* query internal regulatory database (if it exists) */
455 reg_regdb_query(alpha2
);
457 return kobject_uevent(®_pdev
->dev
.kobj
, KOBJ_CHANGE
);
460 static bool reg_is_valid_request(const char *alpha2
)
462 struct regulatory_request
*lr
= get_last_request();
464 if (!lr
|| lr
->processed
)
467 return alpha2_equal(lr
->alpha2
, alpha2
);
470 /* Sanity check on a regulatory rule */
471 static bool is_valid_reg_rule(const struct ieee80211_reg_rule
*rule
)
473 const struct ieee80211_freq_range
*freq_range
= &rule
->freq_range
;
476 if (freq_range
->start_freq_khz
<= 0 || freq_range
->end_freq_khz
<= 0)
479 if (freq_range
->start_freq_khz
> freq_range
->end_freq_khz
)
482 freq_diff
= freq_range
->end_freq_khz
- freq_range
->start_freq_khz
;
484 if (freq_range
->end_freq_khz
<= freq_range
->start_freq_khz
||
485 freq_range
->max_bandwidth_khz
> freq_diff
)
491 static bool is_valid_rd(const struct ieee80211_regdomain
*rd
)
493 const struct ieee80211_reg_rule
*reg_rule
= NULL
;
496 if (!rd
->n_reg_rules
)
499 if (WARN_ON(rd
->n_reg_rules
> NL80211_MAX_SUPP_REG_RULES
))
502 for (i
= 0; i
< rd
->n_reg_rules
; i
++) {
503 reg_rule
= &rd
->reg_rules
[i
];
504 if (!is_valid_reg_rule(reg_rule
))
511 static bool reg_does_bw_fit(const struct ieee80211_freq_range
*freq_range
,
512 u32 center_freq_khz
, u32 bw_khz
)
514 u32 start_freq_khz
, end_freq_khz
;
516 start_freq_khz
= center_freq_khz
- (bw_khz
/2);
517 end_freq_khz
= center_freq_khz
+ (bw_khz
/2);
519 if (start_freq_khz
>= freq_range
->start_freq_khz
&&
520 end_freq_khz
<= freq_range
->end_freq_khz
)
527 * freq_in_rule_band - tells us if a frequency is in a frequency band
528 * @freq_range: frequency rule we want to query
529 * @freq_khz: frequency we are inquiring about
531 * This lets us know if a specific frequency rule is or is not relevant to
532 * a specific frequency's band. Bands are device specific and artificial
533 * definitions (the "2.4 GHz band", the "5 GHz band" and the "60GHz band"),
534 * however it is safe for now to assume that a frequency rule should not be
535 * part of a frequency's band if the start freq or end freq are off by more
536 * than 2 GHz for the 2.4 and 5 GHz bands, and by more than 10 GHz for the
538 * This resolution can be lowered and should be considered as we add
539 * regulatory rule support for other "bands".
541 static bool freq_in_rule_band(const struct ieee80211_freq_range
*freq_range
,
544 #define ONE_GHZ_IN_KHZ 1000000
546 * From 802.11ad: directional multi-gigabit (DMG):
547 * Pertaining to operation in a frequency band containing a channel
548 * with the Channel starting frequency above 45 GHz.
550 u32 limit
= freq_khz
> 45 * ONE_GHZ_IN_KHZ
?
551 10 * ONE_GHZ_IN_KHZ
: 2 * ONE_GHZ_IN_KHZ
;
552 if (abs(freq_khz
- freq_range
->start_freq_khz
) <= limit
)
554 if (abs(freq_khz
- freq_range
->end_freq_khz
) <= limit
)
557 #undef ONE_GHZ_IN_KHZ
561 * Helper for regdom_intersect(), this does the real
562 * mathematical intersection fun
564 static int reg_rules_intersect(const struct ieee80211_reg_rule
*rule1
,
565 const struct ieee80211_reg_rule
*rule2
,
566 struct ieee80211_reg_rule
*intersected_rule
)
568 const struct ieee80211_freq_range
*freq_range1
, *freq_range2
;
569 struct ieee80211_freq_range
*freq_range
;
570 const struct ieee80211_power_rule
*power_rule1
, *power_rule2
;
571 struct ieee80211_power_rule
*power_rule
;
574 freq_range1
= &rule1
->freq_range
;
575 freq_range2
= &rule2
->freq_range
;
576 freq_range
= &intersected_rule
->freq_range
;
578 power_rule1
= &rule1
->power_rule
;
579 power_rule2
= &rule2
->power_rule
;
580 power_rule
= &intersected_rule
->power_rule
;
582 freq_range
->start_freq_khz
= max(freq_range1
->start_freq_khz
,
583 freq_range2
->start_freq_khz
);
584 freq_range
->end_freq_khz
= min(freq_range1
->end_freq_khz
,
585 freq_range2
->end_freq_khz
);
586 freq_range
->max_bandwidth_khz
= min(freq_range1
->max_bandwidth_khz
,
587 freq_range2
->max_bandwidth_khz
);
589 freq_diff
= freq_range
->end_freq_khz
- freq_range
->start_freq_khz
;
590 if (freq_range
->max_bandwidth_khz
> freq_diff
)
591 freq_range
->max_bandwidth_khz
= freq_diff
;
593 power_rule
->max_eirp
= min(power_rule1
->max_eirp
,
594 power_rule2
->max_eirp
);
595 power_rule
->max_antenna_gain
= min(power_rule1
->max_antenna_gain
,
596 power_rule2
->max_antenna_gain
);
598 intersected_rule
->flags
= rule1
->flags
| rule2
->flags
;
600 if (!is_valid_reg_rule(intersected_rule
))
607 * regdom_intersect - do the intersection between two regulatory domains
608 * @rd1: first regulatory domain
609 * @rd2: second regulatory domain
611 * Use this function to get the intersection between two regulatory domains.
612 * Once completed we will mark the alpha2 for the rd as intersected, "98",
613 * as no one single alpha2 can represent this regulatory domain.
615 * Returns a pointer to the regulatory domain structure which will hold the
616 * resulting intersection of rules between rd1 and rd2. We will
617 * kzalloc() this structure for you.
619 static struct ieee80211_regdomain
*
620 regdom_intersect(const struct ieee80211_regdomain
*rd1
,
621 const struct ieee80211_regdomain
*rd2
)
625 unsigned int num_rules
= 0, rule_idx
= 0;
626 const struct ieee80211_reg_rule
*rule1
, *rule2
;
627 struct ieee80211_reg_rule
*intersected_rule
;
628 struct ieee80211_regdomain
*rd
;
629 /* This is just a dummy holder to help us count */
630 struct ieee80211_reg_rule dummy_rule
;
636 * First we get a count of the rules we'll need, then we actually
637 * build them. This is to so we can malloc() and free() a
638 * regdomain once. The reason we use reg_rules_intersect() here
639 * is it will return -EINVAL if the rule computed makes no sense.
640 * All rules that do check out OK are valid.
643 for (x
= 0; x
< rd1
->n_reg_rules
; x
++) {
644 rule1
= &rd1
->reg_rules
[x
];
645 for (y
= 0; y
< rd2
->n_reg_rules
; y
++) {
646 rule2
= &rd2
->reg_rules
[y
];
647 if (!reg_rules_intersect(rule1
, rule2
, &dummy_rule
))
655 size_of_regd
= sizeof(struct ieee80211_regdomain
) +
656 num_rules
* sizeof(struct ieee80211_reg_rule
);
658 rd
= kzalloc(size_of_regd
, GFP_KERNEL
);
662 for (x
= 0; x
< rd1
->n_reg_rules
&& rule_idx
< num_rules
; x
++) {
663 rule1
= &rd1
->reg_rules
[x
];
664 for (y
= 0; y
< rd2
->n_reg_rules
&& rule_idx
< num_rules
; y
++) {
665 rule2
= &rd2
->reg_rules
[y
];
667 * This time around instead of using the stack lets
668 * write to the target rule directly saving ourselves
671 intersected_rule
= &rd
->reg_rules
[rule_idx
];
672 r
= reg_rules_intersect(rule1
, rule2
, intersected_rule
);
674 * No need to memset here the intersected rule here as
675 * we're not using the stack anymore
683 if (rule_idx
!= num_rules
) {
688 rd
->n_reg_rules
= num_rules
;
696 * XXX: add support for the rest of enum nl80211_reg_rule_flags, we may
697 * want to just have the channel structure use these
699 static u32
map_regdom_flags(u32 rd_flags
)
701 u32 channel_flags
= 0;
702 if (rd_flags
& NL80211_RRF_PASSIVE_SCAN
)
703 channel_flags
|= IEEE80211_CHAN_PASSIVE_SCAN
;
704 if (rd_flags
& NL80211_RRF_NO_IBSS
)
705 channel_flags
|= IEEE80211_CHAN_NO_IBSS
;
706 if (rd_flags
& NL80211_RRF_DFS
)
707 channel_flags
|= IEEE80211_CHAN_RADAR
;
708 if (rd_flags
& NL80211_RRF_NO_OFDM
)
709 channel_flags
|= IEEE80211_CHAN_NO_OFDM
;
710 return channel_flags
;
713 static const struct ieee80211_reg_rule
*
714 freq_reg_info_regd(struct wiphy
*wiphy
, u32 center_freq
,
715 const struct ieee80211_regdomain
*regd
)
718 bool band_rule_found
= false;
719 bool bw_fits
= false;
722 return ERR_PTR(-EINVAL
);
724 for (i
= 0; i
< regd
->n_reg_rules
; i
++) {
725 const struct ieee80211_reg_rule
*rr
;
726 const struct ieee80211_freq_range
*fr
= NULL
;
728 rr
= ®d
->reg_rules
[i
];
729 fr
= &rr
->freq_range
;
732 * We only need to know if one frequency rule was
733 * was in center_freq's band, that's enough, so lets
734 * not overwrite it once found
736 if (!band_rule_found
)
737 band_rule_found
= freq_in_rule_band(fr
, center_freq
);
739 bw_fits
= reg_does_bw_fit(fr
, center_freq
, MHZ_TO_KHZ(20));
741 if (band_rule_found
&& bw_fits
)
745 if (!band_rule_found
)
746 return ERR_PTR(-ERANGE
);
748 return ERR_PTR(-EINVAL
);
751 const struct ieee80211_reg_rule
*freq_reg_info(struct wiphy
*wiphy
,
754 const struct ieee80211_regdomain
*regd
;
755 struct regulatory_request
*lr
= get_last_request();
758 * Follow the driver's regulatory domain, if present, unless a country
759 * IE has been processed or a user wants to help complaince further
761 if (lr
->initiator
!= NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
762 lr
->initiator
!= NL80211_REGDOM_SET_BY_USER
&&
764 regd
= get_wiphy_regdom(wiphy
);
766 regd
= get_cfg80211_regdom();
768 return freq_reg_info_regd(wiphy
, center_freq
, regd
);
770 EXPORT_SYMBOL(freq_reg_info
);
772 #ifdef CONFIG_CFG80211_REG_DEBUG
773 static const char *reg_initiator_name(enum nl80211_reg_initiator initiator
)
776 case NL80211_REGDOM_SET_BY_CORE
:
777 return "Set by core";
778 case NL80211_REGDOM_SET_BY_USER
:
779 return "Set by user";
780 case NL80211_REGDOM_SET_BY_DRIVER
:
781 return "Set by driver";
782 case NL80211_REGDOM_SET_BY_COUNTRY_IE
:
783 return "Set by country IE";
790 static void chan_reg_rule_print_dbg(struct ieee80211_channel
*chan
,
791 const struct ieee80211_reg_rule
*reg_rule
)
793 const struct ieee80211_power_rule
*power_rule
;
794 const struct ieee80211_freq_range
*freq_range
;
795 char max_antenna_gain
[32];
797 power_rule
= ®_rule
->power_rule
;
798 freq_range
= ®_rule
->freq_range
;
800 if (!power_rule
->max_antenna_gain
)
801 snprintf(max_antenna_gain
, 32, "N/A");
803 snprintf(max_antenna_gain
, 32, "%d", power_rule
->max_antenna_gain
);
805 REG_DBG_PRINT("Updating information on frequency %d MHz with regulatory rule:\n",
808 REG_DBG_PRINT("%d KHz - %d KHz @ %d KHz), (%s mBi, %d mBm)\n",
809 freq_range
->start_freq_khz
, freq_range
->end_freq_khz
,
810 freq_range
->max_bandwidth_khz
, max_antenna_gain
,
811 power_rule
->max_eirp
);
814 static void chan_reg_rule_print_dbg(struct ieee80211_channel
*chan
,
815 const struct ieee80211_reg_rule
*reg_rule
)
822 * Note that right now we assume the desired channel bandwidth
823 * is always 20 MHz for each individual channel (HT40 uses 20 MHz
824 * per channel, the primary and the extension channel).
826 static void handle_channel(struct wiphy
*wiphy
,
827 enum nl80211_reg_initiator initiator
,
828 struct ieee80211_channel
*chan
)
830 u32 flags
, bw_flags
= 0;
831 const struct ieee80211_reg_rule
*reg_rule
= NULL
;
832 const struct ieee80211_power_rule
*power_rule
= NULL
;
833 const struct ieee80211_freq_range
*freq_range
= NULL
;
834 struct wiphy
*request_wiphy
= NULL
;
835 struct regulatory_request
*lr
= get_last_request();
837 request_wiphy
= wiphy_idx_to_wiphy(lr
->wiphy_idx
);
839 flags
= chan
->orig_flags
;
841 reg_rule
= freq_reg_info(wiphy
, MHZ_TO_KHZ(chan
->center_freq
));
842 if (IS_ERR(reg_rule
)) {
844 * We will disable all channels that do not match our
845 * received regulatory rule unless the hint is coming
846 * from a Country IE and the Country IE had no information
847 * about a band. The IEEE 802.11 spec allows for an AP
848 * to send only a subset of the regulatory rules allowed,
849 * so an AP in the US that only supports 2.4 GHz may only send
850 * a country IE with information for the 2.4 GHz band
851 * while 5 GHz is still supported.
853 if (initiator
== NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
854 PTR_ERR(reg_rule
) == -ERANGE
)
857 REG_DBG_PRINT("Disabling freq %d MHz\n", chan
->center_freq
);
858 chan
->flags
= IEEE80211_CHAN_DISABLED
;
862 chan_reg_rule_print_dbg(chan
, reg_rule
);
864 power_rule
= ®_rule
->power_rule
;
865 freq_range
= ®_rule
->freq_range
;
867 if (freq_range
->max_bandwidth_khz
< MHZ_TO_KHZ(40))
868 bw_flags
= IEEE80211_CHAN_NO_HT40
;
870 if (lr
->initiator
== NL80211_REGDOM_SET_BY_DRIVER
&&
871 request_wiphy
&& request_wiphy
== wiphy
&&
872 request_wiphy
->flags
& WIPHY_FLAG_STRICT_REGULATORY
) {
874 * This guarantees the driver's requested regulatory domain
875 * will always be used as a base for further regulatory
878 chan
->flags
= chan
->orig_flags
=
879 map_regdom_flags(reg_rule
->flags
) | bw_flags
;
880 chan
->max_antenna_gain
= chan
->orig_mag
=
881 (int) MBI_TO_DBI(power_rule
->max_antenna_gain
);
882 chan
->max_reg_power
= chan
->max_power
= chan
->orig_mpwr
=
883 (int) MBM_TO_DBM(power_rule
->max_eirp
);
887 chan
->beacon_found
= false;
888 chan
->flags
= flags
| bw_flags
| map_regdom_flags(reg_rule
->flags
);
889 chan
->max_antenna_gain
=
890 min_t(int, chan
->orig_mag
,
891 MBI_TO_DBI(power_rule
->max_antenna_gain
));
892 chan
->max_reg_power
= (int) MBM_TO_DBM(power_rule
->max_eirp
);
893 if (chan
->orig_mpwr
) {
895 * Devices that have their own custom regulatory domain
896 * but also use WIPHY_FLAG_STRICT_REGULATORY will follow the
897 * passed country IE power settings.
899 if (initiator
== NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
900 wiphy
->flags
& WIPHY_FLAG_CUSTOM_REGULATORY
&&
901 wiphy
->flags
& WIPHY_FLAG_STRICT_REGULATORY
)
902 chan
->max_power
= chan
->max_reg_power
;
904 chan
->max_power
= min(chan
->orig_mpwr
,
905 chan
->max_reg_power
);
907 chan
->max_power
= chan
->max_reg_power
;
910 static void handle_band(struct wiphy
*wiphy
,
911 enum nl80211_reg_initiator initiator
,
912 struct ieee80211_supported_band
*sband
)
919 for (i
= 0; i
< sband
->n_channels
; i
++)
920 handle_channel(wiphy
, initiator
, &sband
->channels
[i
]);
923 static bool reg_request_cell_base(struct regulatory_request
*request
)
925 if (request
->initiator
!= NL80211_REGDOM_SET_BY_USER
)
927 return request
->user_reg_hint_type
== NL80211_USER_REG_HINT_CELL_BASE
;
930 bool reg_last_request_cell_base(void)
934 mutex_lock(®_mutex
);
935 val
= reg_request_cell_base(get_last_request());
936 mutex_unlock(®_mutex
);
941 #ifdef CONFIG_CFG80211_CERTIFICATION_ONUS
942 /* Core specific check */
943 static enum reg_request_treatment
944 reg_ignore_cell_hint(struct regulatory_request
*pending_request
)
946 struct regulatory_request
*lr
= get_last_request();
948 if (!reg_num_devs_support_basehint
)
949 return REG_REQ_IGNORE
;
951 if (reg_request_cell_base(lr
) &&
952 !regdom_changes(pending_request
->alpha2
))
953 return REG_REQ_ALREADY_SET
;
958 /* Device specific check */
959 static bool reg_dev_ignore_cell_hint(struct wiphy
*wiphy
)
961 return !(wiphy
->features
& NL80211_FEATURE_CELL_BASE_REG_HINTS
);
964 static int reg_ignore_cell_hint(struct regulatory_request
*pending_request
)
966 return REG_REQ_IGNORE
;
969 static bool reg_dev_ignore_cell_hint(struct wiphy
*wiphy
)
976 static bool ignore_reg_update(struct wiphy
*wiphy
,
977 enum nl80211_reg_initiator initiator
)
979 struct regulatory_request
*lr
= get_last_request();
982 REG_DBG_PRINT("Ignoring regulatory request %s since last_request is not set\n",
983 reg_initiator_name(initiator
));
987 if (initiator
== NL80211_REGDOM_SET_BY_CORE
&&
988 wiphy
->flags
& WIPHY_FLAG_CUSTOM_REGULATORY
) {
989 REG_DBG_PRINT("Ignoring regulatory request %s since the driver uses its own custom regulatory domain\n",
990 reg_initiator_name(initiator
));
995 * wiphy->regd will be set once the device has its own
996 * desired regulatory domain set
998 if (wiphy
->flags
& WIPHY_FLAG_STRICT_REGULATORY
&& !wiphy
->regd
&&
999 initiator
!= NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
1000 !is_world_regdom(lr
->alpha2
)) {
1001 REG_DBG_PRINT("Ignoring regulatory request %s since the driver requires its own regulatory domain to be set first\n",
1002 reg_initiator_name(initiator
));
1006 if (reg_request_cell_base(lr
))
1007 return reg_dev_ignore_cell_hint(wiphy
);
1012 static bool reg_is_world_roaming(struct wiphy
*wiphy
)
1014 const struct ieee80211_regdomain
*cr
= get_cfg80211_regdom();
1015 const struct ieee80211_regdomain
*wr
= get_wiphy_regdom(wiphy
);
1016 struct regulatory_request
*lr
= get_last_request();
1018 if (is_world_regdom(cr
->alpha2
) || (wr
&& is_world_regdom(wr
->alpha2
)))
1021 if (lr
&& lr
->initiator
!= NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
1022 wiphy
->flags
& WIPHY_FLAG_CUSTOM_REGULATORY
)
1028 static void handle_reg_beacon(struct wiphy
*wiphy
, unsigned int chan_idx
,
1029 struct reg_beacon
*reg_beacon
)
1031 struct ieee80211_supported_band
*sband
;
1032 struct ieee80211_channel
*chan
;
1033 bool channel_changed
= false;
1034 struct ieee80211_channel chan_before
;
1036 sband
= wiphy
->bands
[reg_beacon
->chan
.band
];
1037 chan
= &sband
->channels
[chan_idx
];
1039 if (likely(chan
->center_freq
!= reg_beacon
->chan
.center_freq
))
1042 if (chan
->beacon_found
)
1045 chan
->beacon_found
= true;
1047 if (!reg_is_world_roaming(wiphy
))
1050 if (wiphy
->flags
& WIPHY_FLAG_DISABLE_BEACON_HINTS
)
1053 chan_before
.center_freq
= chan
->center_freq
;
1054 chan_before
.flags
= chan
->flags
;
1056 if (chan
->flags
& IEEE80211_CHAN_PASSIVE_SCAN
) {
1057 chan
->flags
&= ~IEEE80211_CHAN_PASSIVE_SCAN
;
1058 channel_changed
= true;
1061 if (chan
->flags
& IEEE80211_CHAN_NO_IBSS
) {
1062 chan
->flags
&= ~IEEE80211_CHAN_NO_IBSS
;
1063 channel_changed
= true;
1066 if (channel_changed
)
1067 nl80211_send_beacon_hint_event(wiphy
, &chan_before
, chan
);
1071 * Called when a scan on a wiphy finds a beacon on
1074 static void wiphy_update_new_beacon(struct wiphy
*wiphy
,
1075 struct reg_beacon
*reg_beacon
)
1078 struct ieee80211_supported_band
*sband
;
1080 if (!wiphy
->bands
[reg_beacon
->chan
.band
])
1083 sband
= wiphy
->bands
[reg_beacon
->chan
.band
];
1085 for (i
= 0; i
< sband
->n_channels
; i
++)
1086 handle_reg_beacon(wiphy
, i
, reg_beacon
);
1090 * Called upon reg changes or a new wiphy is added
1092 static void wiphy_update_beacon_reg(struct wiphy
*wiphy
)
1095 struct ieee80211_supported_band
*sband
;
1096 struct reg_beacon
*reg_beacon
;
1098 list_for_each_entry(reg_beacon
, ®_beacon_list
, list
) {
1099 if (!wiphy
->bands
[reg_beacon
->chan
.band
])
1101 sband
= wiphy
->bands
[reg_beacon
->chan
.band
];
1102 for (i
= 0; i
< sband
->n_channels
; i
++)
1103 handle_reg_beacon(wiphy
, i
, reg_beacon
);
1107 /* Reap the advantages of previously found beacons */
1108 static void reg_process_beacons(struct wiphy
*wiphy
)
1111 * Means we are just firing up cfg80211, so no beacons would
1112 * have been processed yet.
1116 wiphy_update_beacon_reg(wiphy
);
1119 static bool is_ht40_allowed(struct ieee80211_channel
*chan
)
1123 if (chan
->flags
& IEEE80211_CHAN_DISABLED
)
1125 /* This would happen when regulatory rules disallow HT40 completely */
1126 return !(chan
->flags
& IEEE80211_CHAN_NO_HT40
);
1129 static void reg_process_ht_flags_channel(struct wiphy
*wiphy
,
1130 struct ieee80211_channel
*channel
)
1132 struct ieee80211_supported_band
*sband
= wiphy
->bands
[channel
->band
];
1133 struct ieee80211_channel
*channel_before
= NULL
, *channel_after
= NULL
;
1136 if (!is_ht40_allowed(channel
)) {
1137 channel
->flags
|= IEEE80211_CHAN_NO_HT40
;
1142 * We need to ensure the extension channels exist to
1143 * be able to use HT40- or HT40+, this finds them (or not)
1145 for (i
= 0; i
< sband
->n_channels
; i
++) {
1146 struct ieee80211_channel
*c
= &sband
->channels
[i
];
1148 if (c
->center_freq
== (channel
->center_freq
- 20))
1150 if (c
->center_freq
== (channel
->center_freq
+ 20))
1155 * Please note that this assumes target bandwidth is 20 MHz,
1156 * if that ever changes we also need to change the below logic
1157 * to include that as well.
1159 if (!is_ht40_allowed(channel_before
))
1160 channel
->flags
|= IEEE80211_CHAN_NO_HT40MINUS
;
1162 channel
->flags
&= ~IEEE80211_CHAN_NO_HT40MINUS
;
1164 if (!is_ht40_allowed(channel_after
))
1165 channel
->flags
|= IEEE80211_CHAN_NO_HT40PLUS
;
1167 channel
->flags
&= ~IEEE80211_CHAN_NO_HT40PLUS
;
1170 static void reg_process_ht_flags_band(struct wiphy
*wiphy
,
1171 struct ieee80211_supported_band
*sband
)
1178 for (i
= 0; i
< sband
->n_channels
; i
++)
1179 reg_process_ht_flags_channel(wiphy
, &sband
->channels
[i
]);
1182 static void reg_process_ht_flags(struct wiphy
*wiphy
)
1184 enum ieee80211_band band
;
1189 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++)
1190 reg_process_ht_flags_band(wiphy
, wiphy
->bands
[band
]);
1193 static void wiphy_update_regulatory(struct wiphy
*wiphy
,
1194 enum nl80211_reg_initiator initiator
)
1196 enum ieee80211_band band
;
1197 struct regulatory_request
*lr
= get_last_request();
1199 if (ignore_reg_update(wiphy
, initiator
))
1202 lr
->dfs_region
= get_cfg80211_regdom()->dfs_region
;
1204 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++)
1205 handle_band(wiphy
, initiator
, wiphy
->bands
[band
]);
1207 reg_process_beacons(wiphy
);
1208 reg_process_ht_flags(wiphy
);
1210 if (wiphy
->reg_notifier
)
1211 wiphy
->reg_notifier(wiphy
, lr
);
1214 static void update_all_wiphy_regulatory(enum nl80211_reg_initiator initiator
)
1216 struct cfg80211_registered_device
*rdev
;
1217 struct wiphy
*wiphy
;
1219 assert_cfg80211_lock();
1221 list_for_each_entry(rdev
, &cfg80211_rdev_list
, list
) {
1222 wiphy
= &rdev
->wiphy
;
1223 wiphy_update_regulatory(wiphy
, initiator
);
1225 * Regulatory updates set by CORE are ignored for custom
1226 * regulatory cards. Let us notify the changes to the driver,
1227 * as some drivers used this to restore its orig_* reg domain.
1229 if (initiator
== NL80211_REGDOM_SET_BY_CORE
&&
1230 wiphy
->flags
& WIPHY_FLAG_CUSTOM_REGULATORY
&&
1231 wiphy
->reg_notifier
)
1232 wiphy
->reg_notifier(wiphy
, get_last_request());
1236 static void handle_channel_custom(struct wiphy
*wiphy
,
1237 struct ieee80211_channel
*chan
,
1238 const struct ieee80211_regdomain
*regd
)
1241 const struct ieee80211_reg_rule
*reg_rule
= NULL
;
1242 const struct ieee80211_power_rule
*power_rule
= NULL
;
1243 const struct ieee80211_freq_range
*freq_range
= NULL
;
1245 reg_rule
= freq_reg_info_regd(wiphy
, MHZ_TO_KHZ(chan
->center_freq
),
1248 if (IS_ERR(reg_rule
)) {
1249 REG_DBG_PRINT("Disabling freq %d MHz as custom regd has no rule that fits it\n",
1251 chan
->flags
= IEEE80211_CHAN_DISABLED
;
1255 chan_reg_rule_print_dbg(chan
, reg_rule
);
1257 power_rule
= ®_rule
->power_rule
;
1258 freq_range
= ®_rule
->freq_range
;
1260 if (freq_range
->max_bandwidth_khz
< MHZ_TO_KHZ(40))
1261 bw_flags
= IEEE80211_CHAN_NO_HT40
;
1263 chan
->flags
|= map_regdom_flags(reg_rule
->flags
) | bw_flags
;
1264 chan
->max_antenna_gain
= (int) MBI_TO_DBI(power_rule
->max_antenna_gain
);
1265 chan
->max_reg_power
= chan
->max_power
=
1266 (int) MBM_TO_DBM(power_rule
->max_eirp
);
1269 static void handle_band_custom(struct wiphy
*wiphy
,
1270 struct ieee80211_supported_band
*sband
,
1271 const struct ieee80211_regdomain
*regd
)
1278 for (i
= 0; i
< sband
->n_channels
; i
++)
1279 handle_channel_custom(wiphy
, &sband
->channels
[i
], regd
);
1282 /* Used by drivers prior to wiphy registration */
1283 void wiphy_apply_custom_regulatory(struct wiphy
*wiphy
,
1284 const struct ieee80211_regdomain
*regd
)
1286 enum ieee80211_band band
;
1287 unsigned int bands_set
= 0;
1289 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++) {
1290 if (!wiphy
->bands
[band
])
1292 handle_band_custom(wiphy
, wiphy
->bands
[band
], regd
);
1297 * no point in calling this if it won't have any effect
1298 * on your device's supported bands.
1300 WARN_ON(!bands_set
);
1302 EXPORT_SYMBOL(wiphy_apply_custom_regulatory
);
1304 /* This has the logic which determines when a new request
1305 * should be ignored. */
1306 static enum reg_request_treatment
1307 get_reg_request_treatment(struct wiphy
*wiphy
,
1308 struct regulatory_request
*pending_request
)
1310 struct wiphy
*last_wiphy
= NULL
;
1311 struct regulatory_request
*lr
= get_last_request();
1313 /* All initial requests are respected */
1317 switch (pending_request
->initiator
) {
1318 case NL80211_REGDOM_SET_BY_CORE
:
1320 case NL80211_REGDOM_SET_BY_COUNTRY_IE
:
1321 if (reg_request_cell_base(lr
)) {
1322 /* Trust a Cell base station over the AP's country IE */
1323 if (regdom_changes(pending_request
->alpha2
))
1324 return REG_REQ_IGNORE
;
1325 return REG_REQ_ALREADY_SET
;
1328 last_wiphy
= wiphy_idx_to_wiphy(lr
->wiphy_idx
);
1330 if (unlikely(!is_an_alpha2(pending_request
->alpha2
)))
1332 if (lr
->initiator
== NL80211_REGDOM_SET_BY_COUNTRY_IE
) {
1333 if (last_wiphy
!= wiphy
) {
1335 * Two cards with two APs claiming different
1336 * Country IE alpha2s. We could
1337 * intersect them, but that seems unlikely
1338 * to be correct. Reject second one for now.
1340 if (regdom_changes(pending_request
->alpha2
))
1341 return REG_REQ_IGNORE
;
1342 return REG_REQ_ALREADY_SET
;
1345 * Two consecutive Country IE hints on the same wiphy.
1346 * This should be picked up early by the driver/stack
1348 if (WARN_ON(regdom_changes(pending_request
->alpha2
)))
1350 return REG_REQ_ALREADY_SET
;
1353 case NL80211_REGDOM_SET_BY_DRIVER
:
1354 if (lr
->initiator
== NL80211_REGDOM_SET_BY_CORE
) {
1355 if (regdom_changes(pending_request
->alpha2
))
1357 return REG_REQ_ALREADY_SET
;
1361 * This would happen if you unplug and plug your card
1362 * back in or if you add a new device for which the previously
1363 * loaded card also agrees on the regulatory domain.
1365 if (lr
->initiator
== NL80211_REGDOM_SET_BY_DRIVER
&&
1366 !regdom_changes(pending_request
->alpha2
))
1367 return REG_REQ_ALREADY_SET
;
1369 return REG_REQ_INTERSECT
;
1370 case NL80211_REGDOM_SET_BY_USER
:
1371 if (reg_request_cell_base(pending_request
))
1372 return reg_ignore_cell_hint(pending_request
);
1374 if (reg_request_cell_base(lr
))
1375 return REG_REQ_IGNORE
;
1377 if (lr
->initiator
== NL80211_REGDOM_SET_BY_COUNTRY_IE
)
1378 return REG_REQ_INTERSECT
;
1380 * If the user knows better the user should set the regdom
1381 * to their country before the IE is picked up
1383 if (lr
->initiator
== NL80211_REGDOM_SET_BY_USER
&&
1385 return REG_REQ_IGNORE
;
1387 * Process user requests only after previous user/driver/core
1388 * requests have been processed
1390 if ((lr
->initiator
== NL80211_REGDOM_SET_BY_CORE
||
1391 lr
->initiator
== NL80211_REGDOM_SET_BY_DRIVER
||
1392 lr
->initiator
== NL80211_REGDOM_SET_BY_USER
) &&
1393 regdom_changes(lr
->alpha2
))
1394 return REG_REQ_IGNORE
;
1396 if (!regdom_changes(pending_request
->alpha2
))
1397 return REG_REQ_ALREADY_SET
;
1402 return REG_REQ_IGNORE
;
1405 static void reg_set_request_processed(void)
1407 bool need_more_processing
= false;
1408 struct regulatory_request
*lr
= get_last_request();
1410 lr
->processed
= true;
1412 spin_lock(®_requests_lock
);
1413 if (!list_empty(®_requests_list
))
1414 need_more_processing
= true;
1415 spin_unlock(®_requests_lock
);
1417 if (lr
->initiator
== NL80211_REGDOM_SET_BY_USER
)
1418 cancel_delayed_work(®_timeout
);
1420 if (need_more_processing
)
1421 schedule_work(®_work
);
1425 * __regulatory_hint - hint to the wireless core a regulatory domain
1426 * @wiphy: if the hint comes from country information from an AP, this
1427 * is required to be set to the wiphy that received the information
1428 * @pending_request: the regulatory request currently being processed
1430 * The Wireless subsystem can use this function to hint to the wireless core
1431 * what it believes should be the current regulatory domain.
1433 * Returns one of the different reg request treatment values.
1435 * Caller must hold ®_mutex
1437 static enum reg_request_treatment
1438 __regulatory_hint(struct wiphy
*wiphy
,
1439 struct regulatory_request
*pending_request
)
1441 const struct ieee80211_regdomain
*regd
;
1442 bool intersect
= false;
1443 enum reg_request_treatment treatment
;
1444 struct regulatory_request
*lr
;
1446 treatment
= get_reg_request_treatment(wiphy
, pending_request
);
1448 switch (treatment
) {
1449 case REG_REQ_INTERSECT
:
1450 if (pending_request
->initiator
==
1451 NL80211_REGDOM_SET_BY_DRIVER
) {
1452 regd
= reg_copy_regd(get_cfg80211_regdom());
1454 kfree(pending_request
);
1455 return PTR_ERR(regd
);
1457 rcu_assign_pointer(wiphy
->regd
, regd
);
1465 * If the regulatory domain being requested by the
1466 * driver has already been set just copy it to the
1469 if (treatment
== REG_REQ_ALREADY_SET
&&
1470 pending_request
->initiator
== NL80211_REGDOM_SET_BY_DRIVER
) {
1471 regd
= reg_copy_regd(get_cfg80211_regdom());
1473 kfree(pending_request
);
1474 return REG_REQ_IGNORE
;
1476 treatment
= REG_REQ_ALREADY_SET
;
1477 rcu_assign_pointer(wiphy
->regd
, regd
);
1480 kfree(pending_request
);
1485 lr
= get_last_request();
1486 if (lr
!= &core_request_world
&& lr
)
1487 kfree_rcu(lr
, rcu_head
);
1489 pending_request
->intersect
= intersect
;
1490 pending_request
->processed
= false;
1491 rcu_assign_pointer(last_request
, pending_request
);
1492 lr
= pending_request
;
1494 pending_request
= NULL
;
1496 if (lr
->initiator
== NL80211_REGDOM_SET_BY_USER
) {
1497 user_alpha2
[0] = lr
->alpha2
[0];
1498 user_alpha2
[1] = lr
->alpha2
[1];
1501 /* When r == REG_REQ_INTERSECT we do need to call CRDA */
1502 if (treatment
!= REG_REQ_OK
&& treatment
!= REG_REQ_INTERSECT
) {
1504 * Since CRDA will not be called in this case as we already
1505 * have applied the requested regulatory domain before we just
1506 * inform userspace we have processed the request
1508 if (treatment
== REG_REQ_ALREADY_SET
) {
1509 nl80211_send_reg_change_event(lr
);
1510 reg_set_request_processed();
1515 if (call_crda(lr
->alpha2
))
1516 return REG_REQ_IGNORE
;
1520 /* This processes *all* regulatory hints */
1521 static void reg_process_hint(struct regulatory_request
*reg_request
,
1522 enum nl80211_reg_initiator reg_initiator
)
1524 struct wiphy
*wiphy
= NULL
;
1526 if (WARN_ON(!reg_request
->alpha2
))
1529 if (reg_request
->wiphy_idx
!= WIPHY_IDX_INVALID
)
1530 wiphy
= wiphy_idx_to_wiphy(reg_request
->wiphy_idx
);
1532 if (reg_initiator
== NL80211_REGDOM_SET_BY_DRIVER
&& !wiphy
) {
1537 switch (__regulatory_hint(wiphy
, reg_request
)) {
1538 case REG_REQ_ALREADY_SET
:
1539 /* This is required so that the orig_* parameters are saved */
1540 if (wiphy
&& wiphy
->flags
& WIPHY_FLAG_STRICT_REGULATORY
)
1541 wiphy_update_regulatory(wiphy
, reg_initiator
);
1544 if (reg_initiator
== NL80211_REGDOM_SET_BY_USER
)
1545 schedule_delayed_work(®_timeout
,
1546 msecs_to_jiffies(3142));
1552 * Processes regulatory hints, this is all the NL80211_REGDOM_SET_BY_*
1553 * Regulatory hints come on a first come first serve basis and we
1554 * must process each one atomically.
1556 static void reg_process_pending_hints(void)
1558 struct regulatory_request
*reg_request
, *lr
;
1560 mutex_lock(&cfg80211_mutex
);
1561 mutex_lock(®_mutex
);
1562 lr
= get_last_request();
1564 /* When last_request->processed becomes true this will be rescheduled */
1565 if (lr
&& !lr
->processed
) {
1566 REG_DBG_PRINT("Pending regulatory request, waiting for it to be processed...\n");
1570 spin_lock(®_requests_lock
);
1572 if (list_empty(®_requests_list
)) {
1573 spin_unlock(®_requests_lock
);
1577 reg_request
= list_first_entry(®_requests_list
,
1578 struct regulatory_request
,
1580 list_del_init(®_request
->list
);
1582 spin_unlock(®_requests_lock
);
1584 reg_process_hint(reg_request
, reg_request
->initiator
);
1587 mutex_unlock(®_mutex
);
1588 mutex_unlock(&cfg80211_mutex
);
1591 /* Processes beacon hints -- this has nothing to do with country IEs */
1592 static void reg_process_pending_beacon_hints(void)
1594 struct cfg80211_registered_device
*rdev
;
1595 struct reg_beacon
*pending_beacon
, *tmp
;
1597 mutex_lock(&cfg80211_mutex
);
1598 mutex_lock(®_mutex
);
1600 /* This goes through the _pending_ beacon list */
1601 spin_lock_bh(®_pending_beacons_lock
);
1603 list_for_each_entry_safe(pending_beacon
, tmp
,
1604 ®_pending_beacons
, list
) {
1605 list_del_init(&pending_beacon
->list
);
1607 /* Applies the beacon hint to current wiphys */
1608 list_for_each_entry(rdev
, &cfg80211_rdev_list
, list
)
1609 wiphy_update_new_beacon(&rdev
->wiphy
, pending_beacon
);
1611 /* Remembers the beacon hint for new wiphys or reg changes */
1612 list_add_tail(&pending_beacon
->list
, ®_beacon_list
);
1615 spin_unlock_bh(®_pending_beacons_lock
);
1616 mutex_unlock(®_mutex
);
1617 mutex_unlock(&cfg80211_mutex
);
1620 static void reg_todo(struct work_struct
*work
)
1622 reg_process_pending_hints();
1623 reg_process_pending_beacon_hints();
1626 static void queue_regulatory_request(struct regulatory_request
*request
)
1628 request
->alpha2
[0] = toupper(request
->alpha2
[0]);
1629 request
->alpha2
[1] = toupper(request
->alpha2
[1]);
1631 spin_lock(®_requests_lock
);
1632 list_add_tail(&request
->list
, ®_requests_list
);
1633 spin_unlock(®_requests_lock
);
1635 schedule_work(®_work
);
1639 * Core regulatory hint -- happens during cfg80211_init()
1640 * and when we restore regulatory settings.
1642 static int regulatory_hint_core(const char *alpha2
)
1644 struct regulatory_request
*request
;
1646 request
= kzalloc(sizeof(struct regulatory_request
), GFP_KERNEL
);
1650 request
->alpha2
[0] = alpha2
[0];
1651 request
->alpha2
[1] = alpha2
[1];
1652 request
->initiator
= NL80211_REGDOM_SET_BY_CORE
;
1654 queue_regulatory_request(request
);
1660 int regulatory_hint_user(const char *alpha2
,
1661 enum nl80211_user_reg_hint_type user_reg_hint_type
)
1663 struct regulatory_request
*request
;
1665 if (WARN_ON(!alpha2
))
1668 request
= kzalloc(sizeof(struct regulatory_request
), GFP_KERNEL
);
1672 request
->wiphy_idx
= WIPHY_IDX_INVALID
;
1673 request
->alpha2
[0] = alpha2
[0];
1674 request
->alpha2
[1] = alpha2
[1];
1675 request
->initiator
= NL80211_REGDOM_SET_BY_USER
;
1676 request
->user_reg_hint_type
= user_reg_hint_type
;
1678 queue_regulatory_request(request
);
1684 int regulatory_hint(struct wiphy
*wiphy
, const char *alpha2
)
1686 struct regulatory_request
*request
;
1688 if (WARN_ON(!alpha2
|| !wiphy
))
1691 request
= kzalloc(sizeof(struct regulatory_request
), GFP_KERNEL
);
1695 request
->wiphy_idx
= get_wiphy_idx(wiphy
);
1697 request
->alpha2
[0] = alpha2
[0];
1698 request
->alpha2
[1] = alpha2
[1];
1699 request
->initiator
= NL80211_REGDOM_SET_BY_DRIVER
;
1701 queue_regulatory_request(request
);
1705 EXPORT_SYMBOL(regulatory_hint
);
1708 * We hold wdev_lock() here so we cannot hold cfg80211_mutex() and
1709 * therefore cannot iterate over the rdev list here.
1711 void regulatory_hint_11d(struct wiphy
*wiphy
, enum ieee80211_band band
,
1712 const u8
*country_ie
, u8 country_ie_len
)
1715 enum environment_cap env
= ENVIRON_ANY
;
1716 struct regulatory_request
*request
, *lr
;
1718 mutex_lock(®_mutex
);
1719 lr
= get_last_request();
1724 /* IE len must be evenly divisible by 2 */
1725 if (country_ie_len
& 0x01)
1728 if (country_ie_len
< IEEE80211_COUNTRY_IE_MIN_LEN
)
1731 alpha2
[0] = country_ie
[0];
1732 alpha2
[1] = country_ie
[1];
1734 if (country_ie
[2] == 'I')
1735 env
= ENVIRON_INDOOR
;
1736 else if (country_ie
[2] == 'O')
1737 env
= ENVIRON_OUTDOOR
;
1740 * We will run this only upon a successful connection on cfg80211.
1741 * We leave conflict resolution to the workqueue, where can hold
1744 if (lr
->initiator
== NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
1745 lr
->wiphy_idx
!= WIPHY_IDX_INVALID
)
1748 request
= kzalloc(sizeof(struct regulatory_request
), GFP_KERNEL
);
1752 request
->wiphy_idx
= get_wiphy_idx(wiphy
);
1753 request
->alpha2
[0] = alpha2
[0];
1754 request
->alpha2
[1] = alpha2
[1];
1755 request
->initiator
= NL80211_REGDOM_SET_BY_COUNTRY_IE
;
1756 request
->country_ie_env
= env
;
1758 queue_regulatory_request(request
);
1760 mutex_unlock(®_mutex
);
1763 static void restore_alpha2(char *alpha2
, bool reset_user
)
1765 /* indicates there is no alpha2 to consider for restoration */
1769 /* The user setting has precedence over the module parameter */
1770 if (is_user_regdom_saved()) {
1771 /* Unless we're asked to ignore it and reset it */
1773 REG_DBG_PRINT("Restoring regulatory settings including user preference\n");
1774 user_alpha2
[0] = '9';
1775 user_alpha2
[1] = '7';
1778 * If we're ignoring user settings, we still need to
1779 * check the module parameter to ensure we put things
1780 * back as they were for a full restore.
1782 if (!is_world_regdom(ieee80211_regdom
)) {
1783 REG_DBG_PRINT("Keeping preference on module parameter ieee80211_regdom: %c%c\n",
1784 ieee80211_regdom
[0], ieee80211_regdom
[1]);
1785 alpha2
[0] = ieee80211_regdom
[0];
1786 alpha2
[1] = ieee80211_regdom
[1];
1789 REG_DBG_PRINT("Restoring regulatory settings while preserving user preference for: %c%c\n",
1790 user_alpha2
[0], user_alpha2
[1]);
1791 alpha2
[0] = user_alpha2
[0];
1792 alpha2
[1] = user_alpha2
[1];
1794 } else if (!is_world_regdom(ieee80211_regdom
)) {
1795 REG_DBG_PRINT("Keeping preference on module parameter ieee80211_regdom: %c%c\n",
1796 ieee80211_regdom
[0], ieee80211_regdom
[1]);
1797 alpha2
[0] = ieee80211_regdom
[0];
1798 alpha2
[1] = ieee80211_regdom
[1];
1800 REG_DBG_PRINT("Restoring regulatory settings\n");
1803 static void restore_custom_reg_settings(struct wiphy
*wiphy
)
1805 struct ieee80211_supported_band
*sband
;
1806 enum ieee80211_band band
;
1807 struct ieee80211_channel
*chan
;
1810 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++) {
1811 sband
= wiphy
->bands
[band
];
1814 for (i
= 0; i
< sband
->n_channels
; i
++) {
1815 chan
= &sband
->channels
[i
];
1816 chan
->flags
= chan
->orig_flags
;
1817 chan
->max_antenna_gain
= chan
->orig_mag
;
1818 chan
->max_power
= chan
->orig_mpwr
;
1819 chan
->beacon_found
= false;
1825 * Restoring regulatory settings involves ingoring any
1826 * possibly stale country IE information and user regulatory
1827 * settings if so desired, this includes any beacon hints
1828 * learned as we could have traveled outside to another country
1829 * after disconnection. To restore regulatory settings we do
1830 * exactly what we did at bootup:
1832 * - send a core regulatory hint
1833 * - send a user regulatory hint if applicable
1835 * Device drivers that send a regulatory hint for a specific country
1836 * keep their own regulatory domain on wiphy->regd so that does does
1837 * not need to be remembered.
1839 static void restore_regulatory_settings(bool reset_user
)
1842 char world_alpha2
[2];
1843 struct reg_beacon
*reg_beacon
, *btmp
;
1844 struct regulatory_request
*reg_request
, *tmp
;
1845 LIST_HEAD(tmp_reg_req_list
);
1846 struct cfg80211_registered_device
*rdev
;
1848 mutex_lock(&cfg80211_mutex
);
1849 mutex_lock(®_mutex
);
1851 reset_regdomains(true, cfg80211_world_regdom
);
1852 restore_alpha2(alpha2
, reset_user
);
1855 * If there's any pending requests we simply
1856 * stash them to a temporary pending queue and
1857 * add then after we've restored regulatory
1860 spin_lock(®_requests_lock
);
1861 list_for_each_entry_safe(reg_request
, tmp
, ®_requests_list
, list
) {
1862 if (reg_request
->initiator
!= NL80211_REGDOM_SET_BY_USER
)
1864 list_move_tail(®_request
->list
, &tmp_reg_req_list
);
1866 spin_unlock(®_requests_lock
);
1868 /* Clear beacon hints */
1869 spin_lock_bh(®_pending_beacons_lock
);
1870 list_for_each_entry_safe(reg_beacon
, btmp
, ®_pending_beacons
, list
) {
1871 list_del(®_beacon
->list
);
1874 spin_unlock_bh(®_pending_beacons_lock
);
1876 list_for_each_entry_safe(reg_beacon
, btmp
, ®_beacon_list
, list
) {
1877 list_del(®_beacon
->list
);
1881 /* First restore to the basic regulatory settings */
1882 world_alpha2
[0] = cfg80211_world_regdom
->alpha2
[0];
1883 world_alpha2
[1] = cfg80211_world_regdom
->alpha2
[1];
1885 list_for_each_entry(rdev
, &cfg80211_rdev_list
, list
) {
1886 if (rdev
->wiphy
.flags
& WIPHY_FLAG_CUSTOM_REGULATORY
)
1887 restore_custom_reg_settings(&rdev
->wiphy
);
1890 regulatory_hint_core(world_alpha2
);
1893 * This restores the ieee80211_regdom module parameter
1894 * preference or the last user requested regulatory
1895 * settings, user regulatory settings takes precedence.
1897 if (is_an_alpha2(alpha2
))
1898 regulatory_hint_user(user_alpha2
, NL80211_USER_REG_HINT_USER
);
1900 spin_lock(®_requests_lock
);
1901 list_splice_tail_init(&tmp_reg_req_list
, ®_requests_list
);
1902 spin_unlock(®_requests_lock
);
1904 mutex_unlock(®_mutex
);
1905 mutex_unlock(&cfg80211_mutex
);
1907 REG_DBG_PRINT("Kicking the queue\n");
1909 schedule_work(®_work
);
1912 void regulatory_hint_disconnect(void)
1914 REG_DBG_PRINT("All devices are disconnected, going to restore regulatory settings\n");
1915 restore_regulatory_settings(false);
1918 static bool freq_is_chan_12_13_14(u16 freq
)
1920 if (freq
== ieee80211_channel_to_frequency(12, IEEE80211_BAND_2GHZ
) ||
1921 freq
== ieee80211_channel_to_frequency(13, IEEE80211_BAND_2GHZ
) ||
1922 freq
== ieee80211_channel_to_frequency(14, IEEE80211_BAND_2GHZ
))
1927 static bool pending_reg_beacon(struct ieee80211_channel
*beacon_chan
)
1929 struct reg_beacon
*pending_beacon
;
1931 list_for_each_entry(pending_beacon
, ®_pending_beacons
, list
)
1932 if (beacon_chan
->center_freq
==
1933 pending_beacon
->chan
.center_freq
)
1938 int regulatory_hint_found_beacon(struct wiphy
*wiphy
,
1939 struct ieee80211_channel
*beacon_chan
,
1942 struct reg_beacon
*reg_beacon
;
1945 if (beacon_chan
->beacon_found
||
1946 beacon_chan
->flags
& IEEE80211_CHAN_RADAR
||
1947 (beacon_chan
->band
== IEEE80211_BAND_2GHZ
&&
1948 !freq_is_chan_12_13_14(beacon_chan
->center_freq
)))
1951 spin_lock_bh(®_pending_beacons_lock
);
1952 processing
= pending_reg_beacon(beacon_chan
);
1953 spin_unlock_bh(®_pending_beacons_lock
);
1958 reg_beacon
= kzalloc(sizeof(struct reg_beacon
), gfp
);
1962 REG_DBG_PRINT("Found new beacon on frequency: %d MHz (Ch %d) on %s\n",
1963 beacon_chan
->center_freq
,
1964 ieee80211_frequency_to_channel(beacon_chan
->center_freq
),
1967 memcpy(®_beacon
->chan
, beacon_chan
,
1968 sizeof(struct ieee80211_channel
));
1971 * Since we can be called from BH or and non-BH context
1972 * we must use spin_lock_bh()
1974 spin_lock_bh(®_pending_beacons_lock
);
1975 list_add_tail(®_beacon
->list
, ®_pending_beacons
);
1976 spin_unlock_bh(®_pending_beacons_lock
);
1978 schedule_work(®_work
);
1983 static void print_rd_rules(const struct ieee80211_regdomain
*rd
)
1986 const struct ieee80211_reg_rule
*reg_rule
= NULL
;
1987 const struct ieee80211_freq_range
*freq_range
= NULL
;
1988 const struct ieee80211_power_rule
*power_rule
= NULL
;
1990 pr_info(" (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)\n");
1992 for (i
= 0; i
< rd
->n_reg_rules
; i
++) {
1993 reg_rule
= &rd
->reg_rules
[i
];
1994 freq_range
= ®_rule
->freq_range
;
1995 power_rule
= ®_rule
->power_rule
;
1998 * There may not be documentation for max antenna gain
1999 * in certain regions
2001 if (power_rule
->max_antenna_gain
)
2002 pr_info(" (%d KHz - %d KHz @ %d KHz), (%d mBi, %d mBm)\n",
2003 freq_range
->start_freq_khz
,
2004 freq_range
->end_freq_khz
,
2005 freq_range
->max_bandwidth_khz
,
2006 power_rule
->max_antenna_gain
,
2007 power_rule
->max_eirp
);
2009 pr_info(" (%d KHz - %d KHz @ %d KHz), (N/A, %d mBm)\n",
2010 freq_range
->start_freq_khz
,
2011 freq_range
->end_freq_khz
,
2012 freq_range
->max_bandwidth_khz
,
2013 power_rule
->max_eirp
);
2017 bool reg_supported_dfs_region(u8 dfs_region
)
2019 switch (dfs_region
) {
2020 case NL80211_DFS_UNSET
:
2021 case NL80211_DFS_FCC
:
2022 case NL80211_DFS_ETSI
:
2023 case NL80211_DFS_JP
:
2026 REG_DBG_PRINT("Ignoring uknown DFS master region: %d\n",
2032 static void print_dfs_region(u8 dfs_region
)
2037 switch (dfs_region
) {
2038 case NL80211_DFS_FCC
:
2039 pr_info(" DFS Master region FCC");
2041 case NL80211_DFS_ETSI
:
2042 pr_info(" DFS Master region ETSI");
2044 case NL80211_DFS_JP
:
2045 pr_info(" DFS Master region JP");
2048 pr_info(" DFS Master region Unknown");
2053 static void print_regdomain(const struct ieee80211_regdomain
*rd
)
2055 struct regulatory_request
*lr
= get_last_request();
2057 if (is_intersected_alpha2(rd
->alpha2
)) {
2058 if (lr
->initiator
== NL80211_REGDOM_SET_BY_COUNTRY_IE
) {
2059 struct cfg80211_registered_device
*rdev
;
2060 rdev
= cfg80211_rdev_by_wiphy_idx(lr
->wiphy_idx
);
2062 pr_info("Current regulatory domain updated by AP to: %c%c\n",
2063 rdev
->country_ie_alpha2
[0],
2064 rdev
->country_ie_alpha2
[1]);
2066 pr_info("Current regulatory domain intersected:\n");
2068 pr_info("Current regulatory domain intersected:\n");
2069 } else if (is_world_regdom(rd
->alpha2
)) {
2070 pr_info("World regulatory domain updated:\n");
2072 if (is_unknown_alpha2(rd
->alpha2
))
2073 pr_info("Regulatory domain changed to driver built-in settings (unknown country)\n");
2075 if (reg_request_cell_base(lr
))
2076 pr_info("Regulatory domain changed to country: %c%c by Cell Station\n",
2077 rd
->alpha2
[0], rd
->alpha2
[1]);
2079 pr_info("Regulatory domain changed to country: %c%c\n",
2080 rd
->alpha2
[0], rd
->alpha2
[1]);
2084 print_dfs_region(rd
->dfs_region
);
2088 static void print_regdomain_info(const struct ieee80211_regdomain
*rd
)
2090 pr_info("Regulatory domain: %c%c\n", rd
->alpha2
[0], rd
->alpha2
[1]);
2094 /* Takes ownership of rd only if it doesn't fail */
2095 static int __set_regdom(const struct ieee80211_regdomain
*rd
)
2097 const struct ieee80211_regdomain
*regd
;
2098 const struct ieee80211_regdomain
*intersected_rd
= NULL
;
2099 struct wiphy
*request_wiphy
;
2100 struct regulatory_request
*lr
= get_last_request();
2102 /* Some basic sanity checks first */
2104 if (!reg_is_valid_request(rd
->alpha2
))
2107 if (is_world_regdom(rd
->alpha2
)) {
2108 update_world_regdomain(rd
);
2112 if (!is_alpha2_set(rd
->alpha2
) && !is_an_alpha2(rd
->alpha2
) &&
2113 !is_unknown_alpha2(rd
->alpha2
))
2117 * Lets only bother proceeding on the same alpha2 if the current
2118 * rd is non static (it means CRDA was present and was used last)
2119 * and the pending request came in from a country IE
2121 if (lr
->initiator
!= NL80211_REGDOM_SET_BY_COUNTRY_IE
) {
2123 * If someone else asked us to change the rd lets only bother
2124 * checking if the alpha2 changes if CRDA was already called
2126 if (!regdom_changes(rd
->alpha2
))
2131 * Now lets set the regulatory domain, update all driver channels
2132 * and finally inform them of what we have done, in case they want
2133 * to review or adjust their own settings based on their own
2134 * internal EEPROM data
2137 if (!is_valid_rd(rd
)) {
2138 pr_err("Invalid regulatory domain detected:\n");
2139 print_regdomain_info(rd
);
2143 request_wiphy
= wiphy_idx_to_wiphy(lr
->wiphy_idx
);
2144 if (!request_wiphy
&&
2145 (lr
->initiator
== NL80211_REGDOM_SET_BY_DRIVER
||
2146 lr
->initiator
== NL80211_REGDOM_SET_BY_COUNTRY_IE
)) {
2147 schedule_delayed_work(®_timeout
, 0);
2151 if (!lr
->intersect
) {
2152 if (lr
->initiator
!= NL80211_REGDOM_SET_BY_DRIVER
) {
2153 reset_regdomains(false, rd
);
2158 * For a driver hint, lets copy the regulatory domain the
2159 * driver wanted to the wiphy to deal with conflicts
2163 * Userspace could have sent two replies with only
2164 * one kernel request.
2166 if (request_wiphy
->regd
)
2169 regd
= reg_copy_regd(rd
);
2171 return PTR_ERR(regd
);
2173 rcu_assign_pointer(request_wiphy
->regd
, regd
);
2174 reset_regdomains(false, rd
);
2178 /* Intersection requires a bit more work */
2180 if (lr
->initiator
!= NL80211_REGDOM_SET_BY_COUNTRY_IE
) {
2181 intersected_rd
= regdom_intersect(rd
, get_cfg80211_regdom());
2182 if (!intersected_rd
)
2186 * We can trash what CRDA provided now.
2187 * However if a driver requested this specific regulatory
2188 * domain we keep it for its private use
2190 if (lr
->initiator
== NL80211_REGDOM_SET_BY_DRIVER
)
2191 rcu_assign_pointer(request_wiphy
->regd
, rd
);
2197 reset_regdomains(false, intersected_rd
);
2207 * Use this call to set the current regulatory domain. Conflicts with
2208 * multiple drivers can be ironed out later. Caller must've already
2209 * kmalloc'd the rd structure.
2211 int set_regdom(const struct ieee80211_regdomain
*rd
)
2213 struct regulatory_request
*lr
;
2216 mutex_lock(®_mutex
);
2217 lr
= get_last_request();
2219 /* Note that this doesn't update the wiphys, this is done below */
2220 r
= __set_regdom(rd
);
2223 reg_set_request_processed();
2229 /* This would make this whole thing pointless */
2230 if (WARN_ON(!lr
->intersect
&& rd
!= get_cfg80211_regdom())) {
2235 /* update all wiphys now with the new established regulatory domain */
2236 update_all_wiphy_regulatory(lr
->initiator
);
2238 print_regdomain(get_cfg80211_regdom());
2240 nl80211_send_reg_change_event(lr
);
2242 reg_set_request_processed();
2245 mutex_unlock(®_mutex
);
2250 #ifdef CONFIG_HOTPLUG
2251 int reg_device_uevent(struct device
*dev
, struct kobj_uevent_env
*env
)
2253 struct regulatory_request
*lr
= get_last_request();
2255 if (lr
&& !lr
->processed
) {
2256 if (add_uevent_var(env
, "COUNTRY=%c%c",
2257 lr
->alpha2
[0], lr
->alpha2
[1]))
2264 int reg_device_uevent(struct device
*dev
, struct kobj_uevent_env
*env
)
2268 #endif /* CONFIG_HOTPLUG */
2270 void wiphy_regulatory_register(struct wiphy
*wiphy
)
2272 mutex_lock(®_mutex
);
2274 if (!reg_dev_ignore_cell_hint(wiphy
))
2275 reg_num_devs_support_basehint
++;
2277 wiphy_update_regulatory(wiphy
, NL80211_REGDOM_SET_BY_CORE
);
2279 mutex_unlock(®_mutex
);
2282 /* Caller must hold cfg80211_mutex */
2283 void wiphy_regulatory_deregister(struct wiphy
*wiphy
)
2285 struct wiphy
*request_wiphy
= NULL
;
2286 struct regulatory_request
*lr
;
2288 mutex_lock(®_mutex
);
2289 lr
= get_last_request();
2291 if (!reg_dev_ignore_cell_hint(wiphy
))
2292 reg_num_devs_support_basehint
--;
2294 rcu_free_regdom(get_wiphy_regdom(wiphy
));
2295 rcu_assign_pointer(wiphy
->regd
, NULL
);
2298 request_wiphy
= wiphy_idx_to_wiphy(lr
->wiphy_idx
);
2300 if (!request_wiphy
|| request_wiphy
!= wiphy
)
2303 lr
->wiphy_idx
= WIPHY_IDX_INVALID
;
2304 lr
->country_ie_env
= ENVIRON_ANY
;
2306 mutex_unlock(®_mutex
);
2309 static void reg_timeout_work(struct work_struct
*work
)
2311 REG_DBG_PRINT("Timeout while waiting for CRDA to reply, restoring regulatory settings\n");
2312 restore_regulatory_settings(true);
2315 int __init
regulatory_init(void)
2319 reg_pdev
= platform_device_register_simple("regulatory", 0, NULL
, 0);
2320 if (IS_ERR(reg_pdev
))
2321 return PTR_ERR(reg_pdev
);
2323 reg_pdev
->dev
.type
= ®_device_type
;
2325 spin_lock_init(®_requests_lock
);
2326 spin_lock_init(®_pending_beacons_lock
);
2328 reg_regdb_size_check();
2330 rcu_assign_pointer(cfg80211_regdomain
, cfg80211_world_regdom
);
2332 user_alpha2
[0] = '9';
2333 user_alpha2
[1] = '7';
2335 /* We always try to get an update for the static regdomain */
2336 err
= regulatory_hint_core(cfg80211_world_regdom
->alpha2
);
2341 * N.B. kobject_uevent_env() can fail mainly for when we're out
2342 * memory which is handled and propagated appropriately above
2343 * but it can also fail during a netlink_broadcast() or during
2344 * early boot for call_usermodehelper(). For now treat these
2345 * errors as non-fatal.
2347 pr_err("kobject_uevent_env() was unable to call CRDA during init\n");
2351 * Finally, if the user set the module parameter treat it
2354 if (!is_world_regdom(ieee80211_regdom
))
2355 regulatory_hint_user(ieee80211_regdom
,
2356 NL80211_USER_REG_HINT_USER
);
2361 void regulatory_exit(void)
2363 struct regulatory_request
*reg_request
, *tmp
;
2364 struct reg_beacon
*reg_beacon
, *btmp
;
2366 cancel_work_sync(®_work
);
2367 cancel_delayed_work_sync(®_timeout
);
2369 /* Lock to suppress warnings */
2370 mutex_lock(®_mutex
);
2371 reset_regdomains(true, NULL
);
2372 mutex_unlock(®_mutex
);
2374 dev_set_uevent_suppress(®_pdev
->dev
, true);
2376 platform_device_unregister(reg_pdev
);
2378 list_for_each_entry_safe(reg_beacon
, btmp
, ®_pending_beacons
, list
) {
2379 list_del(®_beacon
->list
);
2383 list_for_each_entry_safe(reg_beacon
, btmp
, ®_beacon_list
, list
) {
2384 list_del(®_beacon
->list
);
2388 list_for_each_entry_safe(reg_request
, tmp
, ®_requests_list
, list
) {
2389 list_del(®_request
->list
);