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
,
85 * Receipt of information from last regulatory request,
86 * protected by RTNL (and can be accessed with RCU protection)
88 static struct regulatory_request __rcu
*last_request
=
89 (void __rcu
*)&core_request_world
;
91 /* To trigger userspace events */
92 static struct platform_device
*reg_pdev
;
94 static struct device_type reg_device_type
= {
95 .uevent
= reg_device_uevent
,
99 * Central wireless core regulatory domains, we only need two,
100 * the current one and a world regulatory domain in case we have no
101 * information to give us an alpha2.
102 * (protected by RTNL, can be read under RCU)
104 const struct ieee80211_regdomain __rcu
*cfg80211_regdomain
;
107 * Number of devices that registered to the core
108 * that support cellular base station regulatory hints
109 * (protected by RTNL)
111 static int reg_num_devs_support_basehint
;
113 static const struct ieee80211_regdomain
*get_cfg80211_regdom(void)
115 return rtnl_dereference(cfg80211_regdomain
);
118 static const struct ieee80211_regdomain
*get_wiphy_regdom(struct wiphy
*wiphy
)
120 return rtnl_dereference(wiphy
->regd
);
123 static void rcu_free_regdom(const struct ieee80211_regdomain
*r
)
127 kfree_rcu((struct ieee80211_regdomain
*)r
, rcu_head
);
130 static struct regulatory_request
*get_last_request(void)
132 return rcu_dereference_rtnl(last_request
);
135 /* Used to queue up regulatory hints */
136 static LIST_HEAD(reg_requests_list
);
137 static spinlock_t reg_requests_lock
;
139 /* Used to queue up beacon hints for review */
140 static LIST_HEAD(reg_pending_beacons
);
141 static spinlock_t reg_pending_beacons_lock
;
143 /* Used to keep track of processed beacon hints */
144 static LIST_HEAD(reg_beacon_list
);
147 struct list_head list
;
148 struct ieee80211_channel chan
;
151 static void reg_todo(struct work_struct
*work
);
152 static DECLARE_WORK(reg_work
, reg_todo
);
154 static void reg_timeout_work(struct work_struct
*work
);
155 static DECLARE_DELAYED_WORK(reg_timeout
, reg_timeout_work
);
157 /* We keep a static world regulatory domain in case of the absence of CRDA */
158 static const struct ieee80211_regdomain world_regdom
= {
162 /* IEEE 802.11b/g, channels 1..11 */
163 REG_RULE(2412-10, 2462+10, 40, 6, 20, 0),
164 /* IEEE 802.11b/g, channels 12..13. */
165 REG_RULE(2467-10, 2472+10, 40, 6, 20,
166 NL80211_RRF_PASSIVE_SCAN
|
167 NL80211_RRF_NO_IBSS
),
168 /* IEEE 802.11 channel 14 - Only JP enables
169 * this and for 802.11b only */
170 REG_RULE(2484-10, 2484+10, 20, 6, 20,
171 NL80211_RRF_PASSIVE_SCAN
|
172 NL80211_RRF_NO_IBSS
|
173 NL80211_RRF_NO_OFDM
),
174 /* IEEE 802.11a, channel 36..48 */
175 REG_RULE(5180-10, 5240+10, 80, 6, 20,
176 NL80211_RRF_PASSIVE_SCAN
|
177 NL80211_RRF_NO_IBSS
),
179 /* NB: 5260 MHz - 5700 MHz requires DFS */
181 /* IEEE 802.11a, channel 149..165 */
182 REG_RULE(5745-10, 5825+10, 80, 6, 20,
183 NL80211_RRF_PASSIVE_SCAN
|
184 NL80211_RRF_NO_IBSS
),
186 /* IEEE 802.11ad (60gHz), channels 1..3 */
187 REG_RULE(56160+2160*1-1080, 56160+2160*3+1080, 2160, 0, 0, 0),
191 /* protected by RTNL */
192 static const struct ieee80211_regdomain
*cfg80211_world_regdom
=
195 static char *ieee80211_regdom
= "00";
196 static char user_alpha2
[2];
198 module_param(ieee80211_regdom
, charp
, 0444);
199 MODULE_PARM_DESC(ieee80211_regdom
, "IEEE 802.11 regulatory domain code");
201 static void reset_regdomains(bool full_reset
,
202 const struct ieee80211_regdomain
*new_regdom
)
204 const struct ieee80211_regdomain
*r
;
205 struct regulatory_request
*lr
;
209 r
= get_cfg80211_regdom();
211 /* avoid freeing static information or freeing something twice */
212 if (r
== cfg80211_world_regdom
)
214 if (cfg80211_world_regdom
== &world_regdom
)
215 cfg80211_world_regdom
= NULL
;
216 if (r
== &world_regdom
)
220 rcu_free_regdom(cfg80211_world_regdom
);
222 cfg80211_world_regdom
= &world_regdom
;
223 rcu_assign_pointer(cfg80211_regdomain
, new_regdom
);
228 lr
= get_last_request();
229 if (lr
!= &core_request_world
&& lr
)
230 kfree_rcu(lr
, rcu_head
);
231 rcu_assign_pointer(last_request
, &core_request_world
);
235 * Dynamic world regulatory domain requested by the wireless
236 * core upon initialization
238 static void update_world_regdomain(const struct ieee80211_regdomain
*rd
)
240 struct regulatory_request
*lr
;
242 lr
= get_last_request();
246 reset_regdomains(false, rd
);
248 cfg80211_world_regdom
= rd
;
251 bool is_world_regdom(const char *alpha2
)
255 return alpha2
[0] == '0' && alpha2
[1] == '0';
258 static bool is_alpha2_set(const char *alpha2
)
262 return alpha2
[0] && alpha2
[1];
265 static bool is_unknown_alpha2(const char *alpha2
)
270 * Special case where regulatory domain was built by driver
271 * but a specific alpha2 cannot be determined
273 return alpha2
[0] == '9' && alpha2
[1] == '9';
276 static bool is_intersected_alpha2(const char *alpha2
)
281 * Special case where regulatory domain is the
282 * result of an intersection between two regulatory domain
285 return alpha2
[0] == '9' && alpha2
[1] == '8';
288 static bool is_an_alpha2(const char *alpha2
)
292 return isalpha(alpha2
[0]) && isalpha(alpha2
[1]);
295 static bool alpha2_equal(const char *alpha2_x
, const char *alpha2_y
)
297 if (!alpha2_x
|| !alpha2_y
)
299 return alpha2_x
[0] == alpha2_y
[0] && alpha2_x
[1] == alpha2_y
[1];
302 static bool regdom_changes(const char *alpha2
)
304 const struct ieee80211_regdomain
*r
= get_cfg80211_regdom();
308 return !alpha2_equal(r
->alpha2
, alpha2
);
312 * The NL80211_REGDOM_SET_BY_USER regdom alpha2 is cached, this lets
313 * you know if a valid regulatory hint with NL80211_REGDOM_SET_BY_USER
314 * has ever been issued.
316 static bool is_user_regdom_saved(void)
318 if (user_alpha2
[0] == '9' && user_alpha2
[1] == '7')
321 /* This would indicate a mistake on the design */
322 if (WARN(!is_world_regdom(user_alpha2
) && !is_an_alpha2(user_alpha2
),
323 "Unexpected user alpha2: %c%c\n",
324 user_alpha2
[0], user_alpha2
[1]))
330 static const struct ieee80211_regdomain
*
331 reg_copy_regd(const struct ieee80211_regdomain
*src_regd
)
333 struct ieee80211_regdomain
*regd
;
338 sizeof(struct ieee80211_regdomain
) +
339 src_regd
->n_reg_rules
* sizeof(struct ieee80211_reg_rule
);
341 regd
= kzalloc(size_of_regd
, GFP_KERNEL
);
343 return ERR_PTR(-ENOMEM
);
345 memcpy(regd
, src_regd
, sizeof(struct ieee80211_regdomain
));
347 for (i
= 0; i
< src_regd
->n_reg_rules
; i
++)
348 memcpy(®d
->reg_rules
[i
], &src_regd
->reg_rules
[i
],
349 sizeof(struct ieee80211_reg_rule
));
354 #ifdef CONFIG_CFG80211_INTERNAL_REGDB
355 struct reg_regdb_search_request
{
357 struct list_head list
;
360 static LIST_HEAD(reg_regdb_search_list
);
361 static DEFINE_MUTEX(reg_regdb_search_mutex
);
363 static void reg_regdb_search(struct work_struct
*work
)
365 struct reg_regdb_search_request
*request
;
366 const struct ieee80211_regdomain
*curdom
, *regdom
= NULL
;
371 mutex_lock(®_regdb_search_mutex
);
372 while (!list_empty(®_regdb_search_list
)) {
373 request
= list_first_entry(®_regdb_search_list
,
374 struct reg_regdb_search_request
,
376 list_del(&request
->list
);
378 for (i
= 0; i
< reg_regdb_size
; i
++) {
379 curdom
= reg_regdb
[i
];
381 if (alpha2_equal(request
->alpha2
, curdom
->alpha2
)) {
382 regdom
= reg_copy_regd(curdom
);
389 mutex_unlock(®_regdb_search_mutex
);
391 if (!IS_ERR_OR_NULL(regdom
))
397 static DECLARE_WORK(reg_regdb_work
, reg_regdb_search
);
399 static void reg_regdb_query(const char *alpha2
)
401 struct reg_regdb_search_request
*request
;
406 request
= kzalloc(sizeof(struct reg_regdb_search_request
), GFP_KERNEL
);
410 memcpy(request
->alpha2
, alpha2
, 2);
412 mutex_lock(®_regdb_search_mutex
);
413 list_add_tail(&request
->list
, ®_regdb_search_list
);
414 mutex_unlock(®_regdb_search_mutex
);
416 schedule_work(®_regdb_work
);
419 /* Feel free to add any other sanity checks here */
420 static void reg_regdb_size_check(void)
422 /* We should ideally BUILD_BUG_ON() but then random builds would fail */
423 WARN_ONCE(!reg_regdb_size
, "db.txt is empty, you should update it...");
426 static inline void reg_regdb_size_check(void) {}
427 static inline void reg_regdb_query(const char *alpha2
) {}
428 #endif /* CONFIG_CFG80211_INTERNAL_REGDB */
431 * This lets us keep regulatory code which is updated on a regulatory
432 * basis in userspace. Country information is filled in by
435 static int call_crda(const char *alpha2
)
437 if (!is_world_regdom((char *) alpha2
))
438 pr_info("Calling CRDA for country: %c%c\n",
439 alpha2
[0], alpha2
[1]);
441 pr_info("Calling CRDA to update world regulatory domain\n");
443 /* query internal regulatory database (if it exists) */
444 reg_regdb_query(alpha2
);
446 return kobject_uevent(®_pdev
->dev
.kobj
, KOBJ_CHANGE
);
449 static bool reg_is_valid_request(const char *alpha2
)
451 struct regulatory_request
*lr
= get_last_request();
453 if (!lr
|| lr
->processed
)
456 return alpha2_equal(lr
->alpha2
, alpha2
);
459 /* Sanity check on a regulatory rule */
460 static bool is_valid_reg_rule(const struct ieee80211_reg_rule
*rule
)
462 const struct ieee80211_freq_range
*freq_range
= &rule
->freq_range
;
465 if (freq_range
->start_freq_khz
<= 0 || freq_range
->end_freq_khz
<= 0)
468 if (freq_range
->start_freq_khz
> freq_range
->end_freq_khz
)
471 freq_diff
= freq_range
->end_freq_khz
- freq_range
->start_freq_khz
;
473 if (freq_range
->end_freq_khz
<= freq_range
->start_freq_khz
||
474 freq_range
->max_bandwidth_khz
> freq_diff
)
480 static bool is_valid_rd(const struct ieee80211_regdomain
*rd
)
482 const struct ieee80211_reg_rule
*reg_rule
= NULL
;
485 if (!rd
->n_reg_rules
)
488 if (WARN_ON(rd
->n_reg_rules
> NL80211_MAX_SUPP_REG_RULES
))
491 for (i
= 0; i
< rd
->n_reg_rules
; i
++) {
492 reg_rule
= &rd
->reg_rules
[i
];
493 if (!is_valid_reg_rule(reg_rule
))
500 static bool reg_does_bw_fit(const struct ieee80211_freq_range
*freq_range
,
501 u32 center_freq_khz
, u32 bw_khz
)
503 u32 start_freq_khz
, end_freq_khz
;
505 start_freq_khz
= center_freq_khz
- (bw_khz
/2);
506 end_freq_khz
= center_freq_khz
+ (bw_khz
/2);
508 if (start_freq_khz
>= freq_range
->start_freq_khz
&&
509 end_freq_khz
<= freq_range
->end_freq_khz
)
516 * freq_in_rule_band - tells us if a frequency is in a frequency band
517 * @freq_range: frequency rule we want to query
518 * @freq_khz: frequency we are inquiring about
520 * This lets us know if a specific frequency rule is or is not relevant to
521 * a specific frequency's band. Bands are device specific and artificial
522 * definitions (the "2.4 GHz band", the "5 GHz band" and the "60GHz band"),
523 * however it is safe for now to assume that a frequency rule should not be
524 * part of a frequency's band if the start freq or end freq are off by more
525 * than 2 GHz for the 2.4 and 5 GHz bands, and by more than 10 GHz for the
527 * This resolution can be lowered and should be considered as we add
528 * regulatory rule support for other "bands".
530 static bool freq_in_rule_band(const struct ieee80211_freq_range
*freq_range
,
533 #define ONE_GHZ_IN_KHZ 1000000
535 * From 802.11ad: directional multi-gigabit (DMG):
536 * Pertaining to operation in a frequency band containing a channel
537 * with the Channel starting frequency above 45 GHz.
539 u32 limit
= freq_khz
> 45 * ONE_GHZ_IN_KHZ
?
540 10 * ONE_GHZ_IN_KHZ
: 2 * ONE_GHZ_IN_KHZ
;
541 if (abs(freq_khz
- freq_range
->start_freq_khz
) <= limit
)
543 if (abs(freq_khz
- freq_range
->end_freq_khz
) <= limit
)
546 #undef ONE_GHZ_IN_KHZ
550 * Helper for regdom_intersect(), this does the real
551 * mathematical intersection fun
553 static int reg_rules_intersect(const struct ieee80211_reg_rule
*rule1
,
554 const struct ieee80211_reg_rule
*rule2
,
555 struct ieee80211_reg_rule
*intersected_rule
)
557 const struct ieee80211_freq_range
*freq_range1
, *freq_range2
;
558 struct ieee80211_freq_range
*freq_range
;
559 const struct ieee80211_power_rule
*power_rule1
, *power_rule2
;
560 struct ieee80211_power_rule
*power_rule
;
563 freq_range1
= &rule1
->freq_range
;
564 freq_range2
= &rule2
->freq_range
;
565 freq_range
= &intersected_rule
->freq_range
;
567 power_rule1
= &rule1
->power_rule
;
568 power_rule2
= &rule2
->power_rule
;
569 power_rule
= &intersected_rule
->power_rule
;
571 freq_range
->start_freq_khz
= max(freq_range1
->start_freq_khz
,
572 freq_range2
->start_freq_khz
);
573 freq_range
->end_freq_khz
= min(freq_range1
->end_freq_khz
,
574 freq_range2
->end_freq_khz
);
575 freq_range
->max_bandwidth_khz
= min(freq_range1
->max_bandwidth_khz
,
576 freq_range2
->max_bandwidth_khz
);
578 freq_diff
= freq_range
->end_freq_khz
- freq_range
->start_freq_khz
;
579 if (freq_range
->max_bandwidth_khz
> freq_diff
)
580 freq_range
->max_bandwidth_khz
= freq_diff
;
582 power_rule
->max_eirp
= min(power_rule1
->max_eirp
,
583 power_rule2
->max_eirp
);
584 power_rule
->max_antenna_gain
= min(power_rule1
->max_antenna_gain
,
585 power_rule2
->max_antenna_gain
);
587 intersected_rule
->flags
= rule1
->flags
| rule2
->flags
;
589 if (!is_valid_reg_rule(intersected_rule
))
596 * regdom_intersect - do the intersection between two regulatory domains
597 * @rd1: first regulatory domain
598 * @rd2: second regulatory domain
600 * Use this function to get the intersection between two regulatory domains.
601 * Once completed we will mark the alpha2 for the rd as intersected, "98",
602 * as no one single alpha2 can represent this regulatory domain.
604 * Returns a pointer to the regulatory domain structure which will hold the
605 * resulting intersection of rules between rd1 and rd2. We will
606 * kzalloc() this structure for you.
608 static struct ieee80211_regdomain
*
609 regdom_intersect(const struct ieee80211_regdomain
*rd1
,
610 const struct ieee80211_regdomain
*rd2
)
614 unsigned int num_rules
= 0, rule_idx
= 0;
615 const struct ieee80211_reg_rule
*rule1
, *rule2
;
616 struct ieee80211_reg_rule
*intersected_rule
;
617 struct ieee80211_regdomain
*rd
;
618 /* This is just a dummy holder to help us count */
619 struct ieee80211_reg_rule dummy_rule
;
625 * First we get a count of the rules we'll need, then we actually
626 * build them. This is to so we can malloc() and free() a
627 * regdomain once. The reason we use reg_rules_intersect() here
628 * is it will return -EINVAL if the rule computed makes no sense.
629 * All rules that do check out OK are valid.
632 for (x
= 0; x
< rd1
->n_reg_rules
; x
++) {
633 rule1
= &rd1
->reg_rules
[x
];
634 for (y
= 0; y
< rd2
->n_reg_rules
; y
++) {
635 rule2
= &rd2
->reg_rules
[y
];
636 if (!reg_rules_intersect(rule1
, rule2
, &dummy_rule
))
644 size_of_regd
= sizeof(struct ieee80211_regdomain
) +
645 num_rules
* sizeof(struct ieee80211_reg_rule
);
647 rd
= kzalloc(size_of_regd
, GFP_KERNEL
);
651 for (x
= 0; x
< rd1
->n_reg_rules
&& rule_idx
< num_rules
; x
++) {
652 rule1
= &rd1
->reg_rules
[x
];
653 for (y
= 0; y
< rd2
->n_reg_rules
&& rule_idx
< num_rules
; y
++) {
654 rule2
= &rd2
->reg_rules
[y
];
656 * This time around instead of using the stack lets
657 * write to the target rule directly saving ourselves
660 intersected_rule
= &rd
->reg_rules
[rule_idx
];
661 r
= reg_rules_intersect(rule1
, rule2
, intersected_rule
);
663 * No need to memset here the intersected rule here as
664 * we're not using the stack anymore
672 if (rule_idx
!= num_rules
) {
677 rd
->n_reg_rules
= num_rules
;
685 * XXX: add support for the rest of enum nl80211_reg_rule_flags, we may
686 * want to just have the channel structure use these
688 static u32
map_regdom_flags(u32 rd_flags
)
690 u32 channel_flags
= 0;
691 if (rd_flags
& NL80211_RRF_PASSIVE_SCAN
)
692 channel_flags
|= IEEE80211_CHAN_PASSIVE_SCAN
;
693 if (rd_flags
& NL80211_RRF_NO_IBSS
)
694 channel_flags
|= IEEE80211_CHAN_NO_IBSS
;
695 if (rd_flags
& NL80211_RRF_DFS
)
696 channel_flags
|= IEEE80211_CHAN_RADAR
;
697 if (rd_flags
& NL80211_RRF_NO_OFDM
)
698 channel_flags
|= IEEE80211_CHAN_NO_OFDM
;
699 return channel_flags
;
702 static const struct ieee80211_reg_rule
*
703 freq_reg_info_regd(struct wiphy
*wiphy
, u32 center_freq
,
704 const struct ieee80211_regdomain
*regd
)
707 bool band_rule_found
= false;
708 bool bw_fits
= false;
711 return ERR_PTR(-EINVAL
);
713 for (i
= 0; i
< regd
->n_reg_rules
; i
++) {
714 const struct ieee80211_reg_rule
*rr
;
715 const struct ieee80211_freq_range
*fr
= NULL
;
717 rr
= ®d
->reg_rules
[i
];
718 fr
= &rr
->freq_range
;
721 * We only need to know if one frequency rule was
722 * was in center_freq's band, that's enough, so lets
723 * not overwrite it once found
725 if (!band_rule_found
)
726 band_rule_found
= freq_in_rule_band(fr
, center_freq
);
728 bw_fits
= reg_does_bw_fit(fr
, center_freq
, MHZ_TO_KHZ(20));
730 if (band_rule_found
&& bw_fits
)
734 if (!band_rule_found
)
735 return ERR_PTR(-ERANGE
);
737 return ERR_PTR(-EINVAL
);
740 const struct ieee80211_reg_rule
*freq_reg_info(struct wiphy
*wiphy
,
743 const struct ieee80211_regdomain
*regd
;
744 struct regulatory_request
*lr
= get_last_request();
747 * Follow the driver's regulatory domain, if present, unless a country
748 * IE has been processed or a user wants to help complaince further
750 if (lr
->initiator
!= NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
751 lr
->initiator
!= NL80211_REGDOM_SET_BY_USER
&&
753 regd
= get_wiphy_regdom(wiphy
);
755 regd
= get_cfg80211_regdom();
757 return freq_reg_info_regd(wiphy
, center_freq
, regd
);
759 EXPORT_SYMBOL(freq_reg_info
);
761 #ifdef CONFIG_CFG80211_REG_DEBUG
762 static const char *reg_initiator_name(enum nl80211_reg_initiator initiator
)
765 case NL80211_REGDOM_SET_BY_CORE
:
766 return "Set by core";
767 case NL80211_REGDOM_SET_BY_USER
:
768 return "Set by user";
769 case NL80211_REGDOM_SET_BY_DRIVER
:
770 return "Set by driver";
771 case NL80211_REGDOM_SET_BY_COUNTRY_IE
:
772 return "Set by country IE";
779 static void chan_reg_rule_print_dbg(struct ieee80211_channel
*chan
,
780 const struct ieee80211_reg_rule
*reg_rule
)
782 const struct ieee80211_power_rule
*power_rule
;
783 const struct ieee80211_freq_range
*freq_range
;
784 char max_antenna_gain
[32];
786 power_rule
= ®_rule
->power_rule
;
787 freq_range
= ®_rule
->freq_range
;
789 if (!power_rule
->max_antenna_gain
)
790 snprintf(max_antenna_gain
, 32, "N/A");
792 snprintf(max_antenna_gain
, 32, "%d", power_rule
->max_antenna_gain
);
794 REG_DBG_PRINT("Updating information on frequency %d MHz with regulatory rule:\n",
797 REG_DBG_PRINT("%d KHz - %d KHz @ %d KHz), (%s mBi, %d mBm)\n",
798 freq_range
->start_freq_khz
, freq_range
->end_freq_khz
,
799 freq_range
->max_bandwidth_khz
, max_antenna_gain
,
800 power_rule
->max_eirp
);
803 static void chan_reg_rule_print_dbg(struct ieee80211_channel
*chan
,
804 const struct ieee80211_reg_rule
*reg_rule
)
811 * Note that right now we assume the desired channel bandwidth
812 * is always 20 MHz for each individual channel (HT40 uses 20 MHz
813 * per channel, the primary and the extension channel).
815 static void handle_channel(struct wiphy
*wiphy
,
816 enum nl80211_reg_initiator initiator
,
817 struct ieee80211_channel
*chan
)
819 u32 flags
, bw_flags
= 0;
820 const struct ieee80211_reg_rule
*reg_rule
= NULL
;
821 const struct ieee80211_power_rule
*power_rule
= NULL
;
822 const struct ieee80211_freq_range
*freq_range
= NULL
;
823 struct wiphy
*request_wiphy
= NULL
;
824 struct regulatory_request
*lr
= get_last_request();
826 request_wiphy
= wiphy_idx_to_wiphy(lr
->wiphy_idx
);
828 flags
= chan
->orig_flags
;
830 reg_rule
= freq_reg_info(wiphy
, MHZ_TO_KHZ(chan
->center_freq
));
831 if (IS_ERR(reg_rule
)) {
833 * We will disable all channels that do not match our
834 * received regulatory rule unless the hint is coming
835 * from a Country IE and the Country IE had no information
836 * about a band. The IEEE 802.11 spec allows for an AP
837 * to send only a subset of the regulatory rules allowed,
838 * so an AP in the US that only supports 2.4 GHz may only send
839 * a country IE with information for the 2.4 GHz band
840 * while 5 GHz is still supported.
842 if (initiator
== NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
843 PTR_ERR(reg_rule
) == -ERANGE
)
846 REG_DBG_PRINT("Disabling freq %d MHz\n", chan
->center_freq
);
847 chan
->flags
|= IEEE80211_CHAN_DISABLED
;
851 chan_reg_rule_print_dbg(chan
, reg_rule
);
853 power_rule
= ®_rule
->power_rule
;
854 freq_range
= ®_rule
->freq_range
;
856 if (freq_range
->max_bandwidth_khz
< MHZ_TO_KHZ(40))
857 bw_flags
= IEEE80211_CHAN_NO_HT40
;
858 if (freq_range
->max_bandwidth_khz
< MHZ_TO_KHZ(80))
859 bw_flags
|= IEEE80211_CHAN_NO_80MHZ
;
860 if (freq_range
->max_bandwidth_khz
< MHZ_TO_KHZ(160))
861 bw_flags
|= IEEE80211_CHAN_NO_160MHZ
;
863 if (lr
->initiator
== NL80211_REGDOM_SET_BY_DRIVER
&&
864 request_wiphy
&& request_wiphy
== wiphy
&&
865 request_wiphy
->flags
& WIPHY_FLAG_STRICT_REGULATORY
) {
867 * This guarantees the driver's requested regulatory domain
868 * will always be used as a base for further regulatory
871 chan
->flags
= chan
->orig_flags
=
872 map_regdom_flags(reg_rule
->flags
) | bw_flags
;
873 chan
->max_antenna_gain
= chan
->orig_mag
=
874 (int) MBI_TO_DBI(power_rule
->max_antenna_gain
);
875 chan
->max_reg_power
= chan
->max_power
= chan
->orig_mpwr
=
876 (int) MBM_TO_DBM(power_rule
->max_eirp
);
880 chan
->dfs_state
= NL80211_DFS_USABLE
;
881 chan
->dfs_state_entered
= jiffies
;
883 chan
->beacon_found
= false;
884 chan
->flags
= flags
| bw_flags
| map_regdom_flags(reg_rule
->flags
);
885 chan
->max_antenna_gain
=
886 min_t(int, chan
->orig_mag
,
887 MBI_TO_DBI(power_rule
->max_antenna_gain
));
888 chan
->max_reg_power
= (int) MBM_TO_DBM(power_rule
->max_eirp
);
889 if (chan
->orig_mpwr
) {
891 * Devices that have their own custom regulatory domain
892 * but also use WIPHY_FLAG_STRICT_REGULATORY will follow the
893 * passed country IE power settings.
895 if (initiator
== NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
896 wiphy
->flags
& WIPHY_FLAG_CUSTOM_REGULATORY
&&
897 wiphy
->flags
& WIPHY_FLAG_STRICT_REGULATORY
)
898 chan
->max_power
= chan
->max_reg_power
;
900 chan
->max_power
= min(chan
->orig_mpwr
,
901 chan
->max_reg_power
);
903 chan
->max_power
= chan
->max_reg_power
;
906 static void handle_band(struct wiphy
*wiphy
,
907 enum nl80211_reg_initiator initiator
,
908 struct ieee80211_supported_band
*sband
)
915 for (i
= 0; i
< sband
->n_channels
; i
++)
916 handle_channel(wiphy
, initiator
, &sband
->channels
[i
]);
919 static bool reg_request_cell_base(struct regulatory_request
*request
)
921 if (request
->initiator
!= NL80211_REGDOM_SET_BY_USER
)
923 return request
->user_reg_hint_type
== NL80211_USER_REG_HINT_CELL_BASE
;
926 bool reg_last_request_cell_base(void)
928 return reg_request_cell_base(get_last_request());
931 #ifdef CONFIG_CFG80211_CERTIFICATION_ONUS
932 /* Core specific check */
933 static enum reg_request_treatment
934 reg_ignore_cell_hint(struct regulatory_request
*pending_request
)
936 struct regulatory_request
*lr
= get_last_request();
938 if (!reg_num_devs_support_basehint
)
939 return REG_REQ_IGNORE
;
941 if (reg_request_cell_base(lr
) &&
942 !regdom_changes(pending_request
->alpha2
))
943 return REG_REQ_ALREADY_SET
;
948 /* Device specific check */
949 static bool reg_dev_ignore_cell_hint(struct wiphy
*wiphy
)
951 return !(wiphy
->features
& NL80211_FEATURE_CELL_BASE_REG_HINTS
);
954 static int reg_ignore_cell_hint(struct regulatory_request
*pending_request
)
956 return REG_REQ_IGNORE
;
959 static bool reg_dev_ignore_cell_hint(struct wiphy
*wiphy
)
966 static bool ignore_reg_update(struct wiphy
*wiphy
,
967 enum nl80211_reg_initiator initiator
)
969 struct regulatory_request
*lr
= get_last_request();
972 REG_DBG_PRINT("Ignoring regulatory request %s since last_request is not set\n",
973 reg_initiator_name(initiator
));
977 if (initiator
== NL80211_REGDOM_SET_BY_CORE
&&
978 wiphy
->flags
& WIPHY_FLAG_CUSTOM_REGULATORY
) {
979 REG_DBG_PRINT("Ignoring regulatory request %s since the driver uses its own custom regulatory domain\n",
980 reg_initiator_name(initiator
));
985 * wiphy->regd will be set once the device has its own
986 * desired regulatory domain set
988 if (wiphy
->flags
& WIPHY_FLAG_STRICT_REGULATORY
&& !wiphy
->regd
&&
989 initiator
!= NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
990 !is_world_regdom(lr
->alpha2
)) {
991 REG_DBG_PRINT("Ignoring regulatory request %s since the driver requires its own regulatory domain to be set first\n",
992 reg_initiator_name(initiator
));
996 if (reg_request_cell_base(lr
))
997 return reg_dev_ignore_cell_hint(wiphy
);
1002 static bool reg_is_world_roaming(struct wiphy
*wiphy
)
1004 const struct ieee80211_regdomain
*cr
= get_cfg80211_regdom();
1005 const struct ieee80211_regdomain
*wr
= get_wiphy_regdom(wiphy
);
1006 struct regulatory_request
*lr
= get_last_request();
1008 if (is_world_regdom(cr
->alpha2
) || (wr
&& is_world_regdom(wr
->alpha2
)))
1011 if (lr
&& lr
->initiator
!= NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
1012 wiphy
->flags
& WIPHY_FLAG_CUSTOM_REGULATORY
)
1018 static void handle_reg_beacon(struct wiphy
*wiphy
, unsigned int chan_idx
,
1019 struct reg_beacon
*reg_beacon
)
1021 struct ieee80211_supported_band
*sband
;
1022 struct ieee80211_channel
*chan
;
1023 bool channel_changed
= false;
1024 struct ieee80211_channel chan_before
;
1026 sband
= wiphy
->bands
[reg_beacon
->chan
.band
];
1027 chan
= &sband
->channels
[chan_idx
];
1029 if (likely(chan
->center_freq
!= reg_beacon
->chan
.center_freq
))
1032 if (chan
->beacon_found
)
1035 chan
->beacon_found
= true;
1037 if (!reg_is_world_roaming(wiphy
))
1040 if (wiphy
->flags
& WIPHY_FLAG_DISABLE_BEACON_HINTS
)
1043 chan_before
.center_freq
= chan
->center_freq
;
1044 chan_before
.flags
= chan
->flags
;
1046 if (chan
->flags
& IEEE80211_CHAN_PASSIVE_SCAN
) {
1047 chan
->flags
&= ~IEEE80211_CHAN_PASSIVE_SCAN
;
1048 channel_changed
= true;
1051 if (chan
->flags
& IEEE80211_CHAN_NO_IBSS
) {
1052 chan
->flags
&= ~IEEE80211_CHAN_NO_IBSS
;
1053 channel_changed
= true;
1056 if (channel_changed
)
1057 nl80211_send_beacon_hint_event(wiphy
, &chan_before
, chan
);
1061 * Called when a scan on a wiphy finds a beacon on
1064 static void wiphy_update_new_beacon(struct wiphy
*wiphy
,
1065 struct reg_beacon
*reg_beacon
)
1068 struct ieee80211_supported_band
*sband
;
1070 if (!wiphy
->bands
[reg_beacon
->chan
.band
])
1073 sband
= wiphy
->bands
[reg_beacon
->chan
.band
];
1075 for (i
= 0; i
< sband
->n_channels
; i
++)
1076 handle_reg_beacon(wiphy
, i
, reg_beacon
);
1080 * Called upon reg changes or a new wiphy is added
1082 static void wiphy_update_beacon_reg(struct wiphy
*wiphy
)
1085 struct ieee80211_supported_band
*sband
;
1086 struct reg_beacon
*reg_beacon
;
1088 list_for_each_entry(reg_beacon
, ®_beacon_list
, list
) {
1089 if (!wiphy
->bands
[reg_beacon
->chan
.band
])
1091 sband
= wiphy
->bands
[reg_beacon
->chan
.band
];
1092 for (i
= 0; i
< sband
->n_channels
; i
++)
1093 handle_reg_beacon(wiphy
, i
, reg_beacon
);
1097 /* Reap the advantages of previously found beacons */
1098 static void reg_process_beacons(struct wiphy
*wiphy
)
1101 * Means we are just firing up cfg80211, so no beacons would
1102 * have been processed yet.
1106 wiphy_update_beacon_reg(wiphy
);
1109 static bool is_ht40_allowed(struct ieee80211_channel
*chan
)
1113 if (chan
->flags
& IEEE80211_CHAN_DISABLED
)
1115 /* This would happen when regulatory rules disallow HT40 completely */
1116 if ((chan
->flags
& IEEE80211_CHAN_NO_HT40
) == IEEE80211_CHAN_NO_HT40
)
1121 static void reg_process_ht_flags_channel(struct wiphy
*wiphy
,
1122 struct ieee80211_channel
*channel
)
1124 struct ieee80211_supported_band
*sband
= wiphy
->bands
[channel
->band
];
1125 struct ieee80211_channel
*channel_before
= NULL
, *channel_after
= NULL
;
1128 if (!is_ht40_allowed(channel
)) {
1129 channel
->flags
|= IEEE80211_CHAN_NO_HT40
;
1134 * We need to ensure the extension channels exist to
1135 * be able to use HT40- or HT40+, this finds them (or not)
1137 for (i
= 0; i
< sband
->n_channels
; i
++) {
1138 struct ieee80211_channel
*c
= &sband
->channels
[i
];
1140 if (c
->center_freq
== (channel
->center_freq
- 20))
1142 if (c
->center_freq
== (channel
->center_freq
+ 20))
1147 * Please note that this assumes target bandwidth is 20 MHz,
1148 * if that ever changes we also need to change the below logic
1149 * to include that as well.
1151 if (!is_ht40_allowed(channel_before
))
1152 channel
->flags
|= IEEE80211_CHAN_NO_HT40MINUS
;
1154 channel
->flags
&= ~IEEE80211_CHAN_NO_HT40MINUS
;
1156 if (!is_ht40_allowed(channel_after
))
1157 channel
->flags
|= IEEE80211_CHAN_NO_HT40PLUS
;
1159 channel
->flags
&= ~IEEE80211_CHAN_NO_HT40PLUS
;
1162 static void reg_process_ht_flags_band(struct wiphy
*wiphy
,
1163 struct ieee80211_supported_band
*sband
)
1170 for (i
= 0; i
< sband
->n_channels
; i
++)
1171 reg_process_ht_flags_channel(wiphy
, &sband
->channels
[i
]);
1174 static void reg_process_ht_flags(struct wiphy
*wiphy
)
1176 enum ieee80211_band band
;
1181 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++)
1182 reg_process_ht_flags_band(wiphy
, wiphy
->bands
[band
]);
1185 static void wiphy_update_regulatory(struct wiphy
*wiphy
,
1186 enum nl80211_reg_initiator initiator
)
1188 enum ieee80211_band band
;
1189 struct regulatory_request
*lr
= get_last_request();
1191 if (ignore_reg_update(wiphy
, initiator
))
1194 lr
->dfs_region
= get_cfg80211_regdom()->dfs_region
;
1196 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++)
1197 handle_band(wiphy
, initiator
, wiphy
->bands
[band
]);
1199 reg_process_beacons(wiphy
);
1200 reg_process_ht_flags(wiphy
);
1202 if (wiphy
->reg_notifier
)
1203 wiphy
->reg_notifier(wiphy
, lr
);
1206 static void update_all_wiphy_regulatory(enum nl80211_reg_initiator initiator
)
1208 struct cfg80211_registered_device
*rdev
;
1209 struct wiphy
*wiphy
;
1213 list_for_each_entry(rdev
, &cfg80211_rdev_list
, list
) {
1214 wiphy
= &rdev
->wiphy
;
1215 wiphy_update_regulatory(wiphy
, initiator
);
1217 * Regulatory updates set by CORE are ignored for custom
1218 * regulatory cards. Let us notify the changes to the driver,
1219 * as some drivers used this to restore its orig_* reg domain.
1221 if (initiator
== NL80211_REGDOM_SET_BY_CORE
&&
1222 wiphy
->flags
& WIPHY_FLAG_CUSTOM_REGULATORY
&&
1223 wiphy
->reg_notifier
)
1224 wiphy
->reg_notifier(wiphy
, get_last_request());
1228 static void handle_channel_custom(struct wiphy
*wiphy
,
1229 struct ieee80211_channel
*chan
,
1230 const struct ieee80211_regdomain
*regd
)
1233 const struct ieee80211_reg_rule
*reg_rule
= NULL
;
1234 const struct ieee80211_power_rule
*power_rule
= NULL
;
1235 const struct ieee80211_freq_range
*freq_range
= NULL
;
1237 reg_rule
= freq_reg_info_regd(wiphy
, MHZ_TO_KHZ(chan
->center_freq
),
1240 if (IS_ERR(reg_rule
)) {
1241 REG_DBG_PRINT("Disabling freq %d MHz as custom regd has no rule that fits it\n",
1243 chan
->flags
= IEEE80211_CHAN_DISABLED
;
1247 chan_reg_rule_print_dbg(chan
, reg_rule
);
1249 power_rule
= ®_rule
->power_rule
;
1250 freq_range
= ®_rule
->freq_range
;
1252 if (freq_range
->max_bandwidth_khz
< MHZ_TO_KHZ(40))
1253 bw_flags
= IEEE80211_CHAN_NO_HT40
;
1254 if (freq_range
->max_bandwidth_khz
< MHZ_TO_KHZ(80))
1255 bw_flags
|= IEEE80211_CHAN_NO_80MHZ
;
1256 if (freq_range
->max_bandwidth_khz
< MHZ_TO_KHZ(160))
1257 bw_flags
|= IEEE80211_CHAN_NO_160MHZ
;
1259 chan
->flags
|= map_regdom_flags(reg_rule
->flags
) | bw_flags
;
1260 chan
->max_antenna_gain
= (int) MBI_TO_DBI(power_rule
->max_antenna_gain
);
1261 chan
->max_reg_power
= chan
->max_power
=
1262 (int) MBM_TO_DBM(power_rule
->max_eirp
);
1265 static void handle_band_custom(struct wiphy
*wiphy
,
1266 struct ieee80211_supported_band
*sband
,
1267 const struct ieee80211_regdomain
*regd
)
1274 for (i
= 0; i
< sband
->n_channels
; i
++)
1275 handle_channel_custom(wiphy
, &sband
->channels
[i
], regd
);
1278 /* Used by drivers prior to wiphy registration */
1279 void wiphy_apply_custom_regulatory(struct wiphy
*wiphy
,
1280 const struct ieee80211_regdomain
*regd
)
1282 enum ieee80211_band band
;
1283 unsigned int bands_set
= 0;
1285 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++) {
1286 if (!wiphy
->bands
[band
])
1288 handle_band_custom(wiphy
, wiphy
->bands
[band
], regd
);
1293 * no point in calling this if it won't have any effect
1294 * on your device's supported bands.
1296 WARN_ON(!bands_set
);
1298 EXPORT_SYMBOL(wiphy_apply_custom_regulatory
);
1300 /* This has the logic which determines when a new request
1301 * should be ignored. */
1302 static enum reg_request_treatment
1303 get_reg_request_treatment(struct wiphy
*wiphy
,
1304 struct regulatory_request
*pending_request
)
1306 struct wiphy
*last_wiphy
= NULL
;
1307 struct regulatory_request
*lr
= get_last_request();
1309 /* All initial requests are respected */
1313 switch (pending_request
->initiator
) {
1314 case NL80211_REGDOM_SET_BY_CORE
:
1316 case NL80211_REGDOM_SET_BY_COUNTRY_IE
:
1317 if (reg_request_cell_base(lr
)) {
1318 /* Trust a Cell base station over the AP's country IE */
1319 if (regdom_changes(pending_request
->alpha2
))
1320 return REG_REQ_IGNORE
;
1321 return REG_REQ_ALREADY_SET
;
1324 last_wiphy
= wiphy_idx_to_wiphy(lr
->wiphy_idx
);
1326 if (unlikely(!is_an_alpha2(pending_request
->alpha2
)))
1328 if (lr
->initiator
== NL80211_REGDOM_SET_BY_COUNTRY_IE
) {
1329 if (last_wiphy
!= wiphy
) {
1331 * Two cards with two APs claiming different
1332 * Country IE alpha2s. We could
1333 * intersect them, but that seems unlikely
1334 * to be correct. Reject second one for now.
1336 if (regdom_changes(pending_request
->alpha2
))
1337 return REG_REQ_IGNORE
;
1338 return REG_REQ_ALREADY_SET
;
1341 * Two consecutive Country IE hints on the same wiphy.
1342 * This should be picked up early by the driver/stack
1344 if (WARN_ON(regdom_changes(pending_request
->alpha2
)))
1346 return REG_REQ_ALREADY_SET
;
1349 case NL80211_REGDOM_SET_BY_DRIVER
:
1350 if (lr
->initiator
== NL80211_REGDOM_SET_BY_CORE
) {
1351 if (regdom_changes(pending_request
->alpha2
))
1353 return REG_REQ_ALREADY_SET
;
1357 * This would happen if you unplug and plug your card
1358 * back in or if you add a new device for which the previously
1359 * loaded card also agrees on the regulatory domain.
1361 if (lr
->initiator
== NL80211_REGDOM_SET_BY_DRIVER
&&
1362 !regdom_changes(pending_request
->alpha2
))
1363 return REG_REQ_ALREADY_SET
;
1365 return REG_REQ_INTERSECT
;
1366 case NL80211_REGDOM_SET_BY_USER
:
1367 if (reg_request_cell_base(pending_request
))
1368 return reg_ignore_cell_hint(pending_request
);
1370 if (reg_request_cell_base(lr
))
1371 return REG_REQ_IGNORE
;
1373 if (lr
->initiator
== NL80211_REGDOM_SET_BY_COUNTRY_IE
)
1374 return REG_REQ_INTERSECT
;
1376 * If the user knows better the user should set the regdom
1377 * to their country before the IE is picked up
1379 if (lr
->initiator
== NL80211_REGDOM_SET_BY_USER
&&
1381 return REG_REQ_IGNORE
;
1383 * Process user requests only after previous user/driver/core
1384 * requests have been processed
1386 if ((lr
->initiator
== NL80211_REGDOM_SET_BY_CORE
||
1387 lr
->initiator
== NL80211_REGDOM_SET_BY_DRIVER
||
1388 lr
->initiator
== NL80211_REGDOM_SET_BY_USER
) &&
1389 regdom_changes(lr
->alpha2
))
1390 return REG_REQ_IGNORE
;
1392 if (!regdom_changes(pending_request
->alpha2
))
1393 return REG_REQ_ALREADY_SET
;
1398 return REG_REQ_IGNORE
;
1401 static void reg_set_request_processed(void)
1403 bool need_more_processing
= false;
1404 struct regulatory_request
*lr
= get_last_request();
1406 lr
->processed
= true;
1408 spin_lock(®_requests_lock
);
1409 if (!list_empty(®_requests_list
))
1410 need_more_processing
= true;
1411 spin_unlock(®_requests_lock
);
1413 if (lr
->initiator
== NL80211_REGDOM_SET_BY_USER
)
1414 cancel_delayed_work(®_timeout
);
1416 if (need_more_processing
)
1417 schedule_work(®_work
);
1421 * __regulatory_hint - hint to the wireless core a regulatory domain
1422 * @wiphy: if the hint comes from country information from an AP, this
1423 * is required to be set to the wiphy that received the information
1424 * @pending_request: the regulatory request currently being processed
1426 * The Wireless subsystem can use this function to hint to the wireless core
1427 * what it believes should be the current regulatory domain.
1429 * Returns one of the different reg request treatment values.
1431 static enum reg_request_treatment
1432 __regulatory_hint(struct wiphy
*wiphy
,
1433 struct regulatory_request
*pending_request
)
1435 const struct ieee80211_regdomain
*regd
;
1436 bool intersect
= false;
1437 enum reg_request_treatment treatment
;
1438 struct regulatory_request
*lr
;
1440 treatment
= get_reg_request_treatment(wiphy
, pending_request
);
1442 switch (treatment
) {
1443 case REG_REQ_INTERSECT
:
1444 if (pending_request
->initiator
==
1445 NL80211_REGDOM_SET_BY_DRIVER
) {
1446 regd
= reg_copy_regd(get_cfg80211_regdom());
1448 kfree(pending_request
);
1449 return PTR_ERR(regd
);
1451 rcu_assign_pointer(wiphy
->regd
, regd
);
1459 * If the regulatory domain being requested by the
1460 * driver has already been set just copy it to the
1463 if (treatment
== REG_REQ_ALREADY_SET
&&
1464 pending_request
->initiator
== NL80211_REGDOM_SET_BY_DRIVER
) {
1465 regd
= reg_copy_regd(get_cfg80211_regdom());
1467 kfree(pending_request
);
1468 return REG_REQ_IGNORE
;
1470 treatment
= REG_REQ_ALREADY_SET
;
1471 rcu_assign_pointer(wiphy
->regd
, regd
);
1474 kfree(pending_request
);
1479 lr
= get_last_request();
1480 if (lr
!= &core_request_world
&& lr
)
1481 kfree_rcu(lr
, rcu_head
);
1483 pending_request
->intersect
= intersect
;
1484 pending_request
->processed
= false;
1485 rcu_assign_pointer(last_request
, pending_request
);
1486 lr
= pending_request
;
1488 pending_request
= NULL
;
1490 if (lr
->initiator
== NL80211_REGDOM_SET_BY_USER
) {
1491 user_alpha2
[0] = lr
->alpha2
[0];
1492 user_alpha2
[1] = lr
->alpha2
[1];
1495 /* When r == REG_REQ_INTERSECT we do need to call CRDA */
1496 if (treatment
!= REG_REQ_OK
&& treatment
!= REG_REQ_INTERSECT
) {
1498 * Since CRDA will not be called in this case as we already
1499 * have applied the requested regulatory domain before we just
1500 * inform userspace we have processed the request
1502 if (treatment
== REG_REQ_ALREADY_SET
) {
1503 nl80211_send_reg_change_event(lr
);
1504 reg_set_request_processed();
1509 if (call_crda(lr
->alpha2
))
1510 return REG_REQ_IGNORE
;
1514 /* This processes *all* regulatory hints */
1515 static void reg_process_hint(struct regulatory_request
*reg_request
,
1516 enum nl80211_reg_initiator reg_initiator
)
1518 struct wiphy
*wiphy
= NULL
;
1520 if (WARN_ON(!reg_request
->alpha2
))
1523 if (reg_request
->wiphy_idx
!= WIPHY_IDX_INVALID
)
1524 wiphy
= wiphy_idx_to_wiphy(reg_request
->wiphy_idx
);
1526 if (reg_initiator
== NL80211_REGDOM_SET_BY_DRIVER
&& !wiphy
) {
1531 switch (__regulatory_hint(wiphy
, reg_request
)) {
1532 case REG_REQ_ALREADY_SET
:
1533 /* This is required so that the orig_* parameters are saved */
1534 if (wiphy
&& wiphy
->flags
& WIPHY_FLAG_STRICT_REGULATORY
)
1535 wiphy_update_regulatory(wiphy
, reg_initiator
);
1538 if (reg_initiator
== NL80211_REGDOM_SET_BY_USER
)
1539 schedule_delayed_work(®_timeout
,
1540 msecs_to_jiffies(3142));
1546 * Processes regulatory hints, this is all the NL80211_REGDOM_SET_BY_*
1547 * Regulatory hints come on a first come first serve basis and we
1548 * must process each one atomically.
1550 static void reg_process_pending_hints(void)
1552 struct regulatory_request
*reg_request
, *lr
;
1554 lr
= get_last_request();
1556 /* When last_request->processed becomes true this will be rescheduled */
1557 if (lr
&& !lr
->processed
) {
1558 REG_DBG_PRINT("Pending regulatory request, waiting for it to be processed...\n");
1562 spin_lock(®_requests_lock
);
1564 if (list_empty(®_requests_list
)) {
1565 spin_unlock(®_requests_lock
);
1569 reg_request
= list_first_entry(®_requests_list
,
1570 struct regulatory_request
,
1572 list_del_init(®_request
->list
);
1574 spin_unlock(®_requests_lock
);
1576 reg_process_hint(reg_request
, reg_request
->initiator
);
1579 /* Processes beacon hints -- this has nothing to do with country IEs */
1580 static void reg_process_pending_beacon_hints(void)
1582 struct cfg80211_registered_device
*rdev
;
1583 struct reg_beacon
*pending_beacon
, *tmp
;
1585 /* This goes through the _pending_ beacon list */
1586 spin_lock_bh(®_pending_beacons_lock
);
1588 list_for_each_entry_safe(pending_beacon
, tmp
,
1589 ®_pending_beacons
, list
) {
1590 list_del_init(&pending_beacon
->list
);
1592 /* Applies the beacon hint to current wiphys */
1593 list_for_each_entry(rdev
, &cfg80211_rdev_list
, list
)
1594 wiphy_update_new_beacon(&rdev
->wiphy
, pending_beacon
);
1596 /* Remembers the beacon hint for new wiphys or reg changes */
1597 list_add_tail(&pending_beacon
->list
, ®_beacon_list
);
1600 spin_unlock_bh(®_pending_beacons_lock
);
1603 static void reg_todo(struct work_struct
*work
)
1606 reg_process_pending_hints();
1607 reg_process_pending_beacon_hints();
1611 static void queue_regulatory_request(struct regulatory_request
*request
)
1613 request
->alpha2
[0] = toupper(request
->alpha2
[0]);
1614 request
->alpha2
[1] = toupper(request
->alpha2
[1]);
1616 spin_lock(®_requests_lock
);
1617 list_add_tail(&request
->list
, ®_requests_list
);
1618 spin_unlock(®_requests_lock
);
1620 schedule_work(®_work
);
1624 * Core regulatory hint -- happens during cfg80211_init()
1625 * and when we restore regulatory settings.
1627 static int regulatory_hint_core(const char *alpha2
)
1629 struct regulatory_request
*request
;
1631 request
= kzalloc(sizeof(struct regulatory_request
), GFP_KERNEL
);
1635 request
->alpha2
[0] = alpha2
[0];
1636 request
->alpha2
[1] = alpha2
[1];
1637 request
->initiator
= NL80211_REGDOM_SET_BY_CORE
;
1639 queue_regulatory_request(request
);
1645 int regulatory_hint_user(const char *alpha2
,
1646 enum nl80211_user_reg_hint_type user_reg_hint_type
)
1648 struct regulatory_request
*request
;
1650 if (WARN_ON(!alpha2
))
1653 request
= kzalloc(sizeof(struct regulatory_request
), GFP_KERNEL
);
1657 request
->wiphy_idx
= WIPHY_IDX_INVALID
;
1658 request
->alpha2
[0] = alpha2
[0];
1659 request
->alpha2
[1] = alpha2
[1];
1660 request
->initiator
= NL80211_REGDOM_SET_BY_USER
;
1661 request
->user_reg_hint_type
= user_reg_hint_type
;
1663 queue_regulatory_request(request
);
1669 int regulatory_hint(struct wiphy
*wiphy
, const char *alpha2
)
1671 struct regulatory_request
*request
;
1673 if (WARN_ON(!alpha2
|| !wiphy
))
1676 request
= kzalloc(sizeof(struct regulatory_request
), GFP_KERNEL
);
1680 request
->wiphy_idx
= get_wiphy_idx(wiphy
);
1682 request
->alpha2
[0] = alpha2
[0];
1683 request
->alpha2
[1] = alpha2
[1];
1684 request
->initiator
= NL80211_REGDOM_SET_BY_DRIVER
;
1686 queue_regulatory_request(request
);
1690 EXPORT_SYMBOL(regulatory_hint
);
1692 void regulatory_hint_11d(struct wiphy
*wiphy
, enum ieee80211_band band
,
1693 const u8
*country_ie
, u8 country_ie_len
)
1696 enum environment_cap env
= ENVIRON_ANY
;
1697 struct regulatory_request
*request
= NULL
, *lr
;
1699 /* IE len must be evenly divisible by 2 */
1700 if (country_ie_len
& 0x01)
1703 if (country_ie_len
< IEEE80211_COUNTRY_IE_MIN_LEN
)
1706 request
= kzalloc(sizeof(*request
), GFP_KERNEL
);
1710 alpha2
[0] = country_ie
[0];
1711 alpha2
[1] = country_ie
[1];
1713 if (country_ie
[2] == 'I')
1714 env
= ENVIRON_INDOOR
;
1715 else if (country_ie
[2] == 'O')
1716 env
= ENVIRON_OUTDOOR
;
1719 lr
= get_last_request();
1725 * We will run this only upon a successful connection on cfg80211.
1726 * We leave conflict resolution to the workqueue, where can hold
1729 if (lr
->initiator
== NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
1730 lr
->wiphy_idx
!= WIPHY_IDX_INVALID
)
1733 request
->wiphy_idx
= get_wiphy_idx(wiphy
);
1734 request
->alpha2
[0] = alpha2
[0];
1735 request
->alpha2
[1] = alpha2
[1];
1736 request
->initiator
= NL80211_REGDOM_SET_BY_COUNTRY_IE
;
1737 request
->country_ie_env
= env
;
1739 queue_regulatory_request(request
);
1746 static void restore_alpha2(char *alpha2
, bool reset_user
)
1748 /* indicates there is no alpha2 to consider for restoration */
1752 /* The user setting has precedence over the module parameter */
1753 if (is_user_regdom_saved()) {
1754 /* Unless we're asked to ignore it and reset it */
1756 REG_DBG_PRINT("Restoring regulatory settings including user preference\n");
1757 user_alpha2
[0] = '9';
1758 user_alpha2
[1] = '7';
1761 * If we're ignoring user settings, we still need to
1762 * check the module parameter to ensure we put things
1763 * back as they were for a full restore.
1765 if (!is_world_regdom(ieee80211_regdom
)) {
1766 REG_DBG_PRINT("Keeping preference on module parameter ieee80211_regdom: %c%c\n",
1767 ieee80211_regdom
[0], ieee80211_regdom
[1]);
1768 alpha2
[0] = ieee80211_regdom
[0];
1769 alpha2
[1] = ieee80211_regdom
[1];
1772 REG_DBG_PRINT("Restoring regulatory settings while preserving user preference for: %c%c\n",
1773 user_alpha2
[0], user_alpha2
[1]);
1774 alpha2
[0] = user_alpha2
[0];
1775 alpha2
[1] = user_alpha2
[1];
1777 } else if (!is_world_regdom(ieee80211_regdom
)) {
1778 REG_DBG_PRINT("Keeping preference on module parameter ieee80211_regdom: %c%c\n",
1779 ieee80211_regdom
[0], ieee80211_regdom
[1]);
1780 alpha2
[0] = ieee80211_regdom
[0];
1781 alpha2
[1] = ieee80211_regdom
[1];
1783 REG_DBG_PRINT("Restoring regulatory settings\n");
1786 static void restore_custom_reg_settings(struct wiphy
*wiphy
)
1788 struct ieee80211_supported_band
*sband
;
1789 enum ieee80211_band band
;
1790 struct ieee80211_channel
*chan
;
1793 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++) {
1794 sband
= wiphy
->bands
[band
];
1797 for (i
= 0; i
< sband
->n_channels
; i
++) {
1798 chan
= &sband
->channels
[i
];
1799 chan
->flags
= chan
->orig_flags
;
1800 chan
->max_antenna_gain
= chan
->orig_mag
;
1801 chan
->max_power
= chan
->orig_mpwr
;
1802 chan
->beacon_found
= false;
1808 * Restoring regulatory settings involves ingoring any
1809 * possibly stale country IE information and user regulatory
1810 * settings if so desired, this includes any beacon hints
1811 * learned as we could have traveled outside to another country
1812 * after disconnection. To restore regulatory settings we do
1813 * exactly what we did at bootup:
1815 * - send a core regulatory hint
1816 * - send a user regulatory hint if applicable
1818 * Device drivers that send a regulatory hint for a specific country
1819 * keep their own regulatory domain on wiphy->regd so that does does
1820 * not need to be remembered.
1822 static void restore_regulatory_settings(bool reset_user
)
1825 char world_alpha2
[2];
1826 struct reg_beacon
*reg_beacon
, *btmp
;
1827 struct regulatory_request
*reg_request
, *tmp
;
1828 LIST_HEAD(tmp_reg_req_list
);
1829 struct cfg80211_registered_device
*rdev
;
1833 reset_regdomains(true, &world_regdom
);
1834 restore_alpha2(alpha2
, reset_user
);
1837 * If there's any pending requests we simply
1838 * stash them to a temporary pending queue and
1839 * add then after we've restored regulatory
1842 spin_lock(®_requests_lock
);
1843 list_for_each_entry_safe(reg_request
, tmp
, ®_requests_list
, list
) {
1844 if (reg_request
->initiator
!= NL80211_REGDOM_SET_BY_USER
)
1846 list_move_tail(®_request
->list
, &tmp_reg_req_list
);
1848 spin_unlock(®_requests_lock
);
1850 /* Clear beacon hints */
1851 spin_lock_bh(®_pending_beacons_lock
);
1852 list_for_each_entry_safe(reg_beacon
, btmp
, ®_pending_beacons
, list
) {
1853 list_del(®_beacon
->list
);
1856 spin_unlock_bh(®_pending_beacons_lock
);
1858 list_for_each_entry_safe(reg_beacon
, btmp
, ®_beacon_list
, list
) {
1859 list_del(®_beacon
->list
);
1863 /* First restore to the basic regulatory settings */
1864 world_alpha2
[0] = cfg80211_world_regdom
->alpha2
[0];
1865 world_alpha2
[1] = cfg80211_world_regdom
->alpha2
[1];
1867 list_for_each_entry(rdev
, &cfg80211_rdev_list
, list
) {
1868 if (rdev
->wiphy
.flags
& WIPHY_FLAG_CUSTOM_REGULATORY
)
1869 restore_custom_reg_settings(&rdev
->wiphy
);
1872 regulatory_hint_core(world_alpha2
);
1875 * This restores the ieee80211_regdom module parameter
1876 * preference or the last user requested regulatory
1877 * settings, user regulatory settings takes precedence.
1879 if (is_an_alpha2(alpha2
))
1880 regulatory_hint_user(user_alpha2
, NL80211_USER_REG_HINT_USER
);
1882 spin_lock(®_requests_lock
);
1883 list_splice_tail_init(&tmp_reg_req_list
, ®_requests_list
);
1884 spin_unlock(®_requests_lock
);
1886 REG_DBG_PRINT("Kicking the queue\n");
1888 schedule_work(®_work
);
1891 void regulatory_hint_disconnect(void)
1893 REG_DBG_PRINT("All devices are disconnected, going to restore regulatory settings\n");
1894 restore_regulatory_settings(false);
1897 static bool freq_is_chan_12_13_14(u16 freq
)
1899 if (freq
== ieee80211_channel_to_frequency(12, IEEE80211_BAND_2GHZ
) ||
1900 freq
== ieee80211_channel_to_frequency(13, IEEE80211_BAND_2GHZ
) ||
1901 freq
== ieee80211_channel_to_frequency(14, IEEE80211_BAND_2GHZ
))
1906 static bool pending_reg_beacon(struct ieee80211_channel
*beacon_chan
)
1908 struct reg_beacon
*pending_beacon
;
1910 list_for_each_entry(pending_beacon
, ®_pending_beacons
, list
)
1911 if (beacon_chan
->center_freq
==
1912 pending_beacon
->chan
.center_freq
)
1917 int regulatory_hint_found_beacon(struct wiphy
*wiphy
,
1918 struct ieee80211_channel
*beacon_chan
,
1921 struct reg_beacon
*reg_beacon
;
1924 if (beacon_chan
->beacon_found
||
1925 beacon_chan
->flags
& IEEE80211_CHAN_RADAR
||
1926 (beacon_chan
->band
== IEEE80211_BAND_2GHZ
&&
1927 !freq_is_chan_12_13_14(beacon_chan
->center_freq
)))
1930 spin_lock_bh(®_pending_beacons_lock
);
1931 processing
= pending_reg_beacon(beacon_chan
);
1932 spin_unlock_bh(®_pending_beacons_lock
);
1937 reg_beacon
= kzalloc(sizeof(struct reg_beacon
), gfp
);
1941 REG_DBG_PRINT("Found new beacon on frequency: %d MHz (Ch %d) on %s\n",
1942 beacon_chan
->center_freq
,
1943 ieee80211_frequency_to_channel(beacon_chan
->center_freq
),
1946 memcpy(®_beacon
->chan
, beacon_chan
,
1947 sizeof(struct ieee80211_channel
));
1950 * Since we can be called from BH or and non-BH context
1951 * we must use spin_lock_bh()
1953 spin_lock_bh(®_pending_beacons_lock
);
1954 list_add_tail(®_beacon
->list
, ®_pending_beacons
);
1955 spin_unlock_bh(®_pending_beacons_lock
);
1957 schedule_work(®_work
);
1962 static void print_rd_rules(const struct ieee80211_regdomain
*rd
)
1965 const struct ieee80211_reg_rule
*reg_rule
= NULL
;
1966 const struct ieee80211_freq_range
*freq_range
= NULL
;
1967 const struct ieee80211_power_rule
*power_rule
= NULL
;
1969 pr_info(" (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)\n");
1971 for (i
= 0; i
< rd
->n_reg_rules
; i
++) {
1972 reg_rule
= &rd
->reg_rules
[i
];
1973 freq_range
= ®_rule
->freq_range
;
1974 power_rule
= ®_rule
->power_rule
;
1977 * There may not be documentation for max antenna gain
1978 * in certain regions
1980 if (power_rule
->max_antenna_gain
)
1981 pr_info(" (%d KHz - %d KHz @ %d KHz), (%d mBi, %d mBm)\n",
1982 freq_range
->start_freq_khz
,
1983 freq_range
->end_freq_khz
,
1984 freq_range
->max_bandwidth_khz
,
1985 power_rule
->max_antenna_gain
,
1986 power_rule
->max_eirp
);
1988 pr_info(" (%d KHz - %d KHz @ %d KHz), (N/A, %d mBm)\n",
1989 freq_range
->start_freq_khz
,
1990 freq_range
->end_freq_khz
,
1991 freq_range
->max_bandwidth_khz
,
1992 power_rule
->max_eirp
);
1996 bool reg_supported_dfs_region(u8 dfs_region
)
1998 switch (dfs_region
) {
1999 case NL80211_DFS_UNSET
:
2000 case NL80211_DFS_FCC
:
2001 case NL80211_DFS_ETSI
:
2002 case NL80211_DFS_JP
:
2005 REG_DBG_PRINT("Ignoring uknown DFS master region: %d\n",
2011 static void print_dfs_region(u8 dfs_region
)
2016 switch (dfs_region
) {
2017 case NL80211_DFS_FCC
:
2018 pr_info(" DFS Master region FCC");
2020 case NL80211_DFS_ETSI
:
2021 pr_info(" DFS Master region ETSI");
2023 case NL80211_DFS_JP
:
2024 pr_info(" DFS Master region JP");
2027 pr_info(" DFS Master region Unknown");
2032 static void print_regdomain(const struct ieee80211_regdomain
*rd
)
2034 struct regulatory_request
*lr
= get_last_request();
2036 if (is_intersected_alpha2(rd
->alpha2
)) {
2037 if (lr
->initiator
== NL80211_REGDOM_SET_BY_COUNTRY_IE
) {
2038 struct cfg80211_registered_device
*rdev
;
2039 rdev
= cfg80211_rdev_by_wiphy_idx(lr
->wiphy_idx
);
2041 pr_info("Current regulatory domain updated by AP to: %c%c\n",
2042 rdev
->country_ie_alpha2
[0],
2043 rdev
->country_ie_alpha2
[1]);
2045 pr_info("Current regulatory domain intersected:\n");
2047 pr_info("Current regulatory domain intersected:\n");
2048 } else if (is_world_regdom(rd
->alpha2
)) {
2049 pr_info("World regulatory domain updated:\n");
2051 if (is_unknown_alpha2(rd
->alpha2
))
2052 pr_info("Regulatory domain changed to driver built-in settings (unknown country)\n");
2054 if (reg_request_cell_base(lr
))
2055 pr_info("Regulatory domain changed to country: %c%c by Cell Station\n",
2056 rd
->alpha2
[0], rd
->alpha2
[1]);
2058 pr_info("Regulatory domain changed to country: %c%c\n",
2059 rd
->alpha2
[0], rd
->alpha2
[1]);
2063 print_dfs_region(rd
->dfs_region
);
2067 static void print_regdomain_info(const struct ieee80211_regdomain
*rd
)
2069 pr_info("Regulatory domain: %c%c\n", rd
->alpha2
[0], rd
->alpha2
[1]);
2073 /* Takes ownership of rd only if it doesn't fail */
2074 static int __set_regdom(const struct ieee80211_regdomain
*rd
)
2076 const struct ieee80211_regdomain
*regd
;
2077 const struct ieee80211_regdomain
*intersected_rd
= NULL
;
2078 struct wiphy
*request_wiphy
;
2079 struct regulatory_request
*lr
= get_last_request();
2081 /* Some basic sanity checks first */
2083 if (!reg_is_valid_request(rd
->alpha2
))
2086 if (is_world_regdom(rd
->alpha2
)) {
2087 update_world_regdomain(rd
);
2091 if (!is_alpha2_set(rd
->alpha2
) && !is_an_alpha2(rd
->alpha2
) &&
2092 !is_unknown_alpha2(rd
->alpha2
))
2096 * Lets only bother proceeding on the same alpha2 if the current
2097 * rd is non static (it means CRDA was present and was used last)
2098 * and the pending request came in from a country IE
2100 if (lr
->initiator
!= NL80211_REGDOM_SET_BY_COUNTRY_IE
) {
2102 * If someone else asked us to change the rd lets only bother
2103 * checking if the alpha2 changes if CRDA was already called
2105 if (!regdom_changes(rd
->alpha2
))
2110 * Now lets set the regulatory domain, update all driver channels
2111 * and finally inform them of what we have done, in case they want
2112 * to review or adjust their own settings based on their own
2113 * internal EEPROM data
2116 if (!is_valid_rd(rd
)) {
2117 pr_err("Invalid regulatory domain detected:\n");
2118 print_regdomain_info(rd
);
2122 request_wiphy
= wiphy_idx_to_wiphy(lr
->wiphy_idx
);
2123 if (!request_wiphy
&&
2124 (lr
->initiator
== NL80211_REGDOM_SET_BY_DRIVER
||
2125 lr
->initiator
== NL80211_REGDOM_SET_BY_COUNTRY_IE
)) {
2126 schedule_delayed_work(®_timeout
, 0);
2130 if (!lr
->intersect
) {
2131 if (lr
->initiator
!= NL80211_REGDOM_SET_BY_DRIVER
) {
2132 reset_regdomains(false, rd
);
2137 * For a driver hint, lets copy the regulatory domain the
2138 * driver wanted to the wiphy to deal with conflicts
2142 * Userspace could have sent two replies with only
2143 * one kernel request.
2145 if (request_wiphy
->regd
)
2148 regd
= reg_copy_regd(rd
);
2150 return PTR_ERR(regd
);
2152 rcu_assign_pointer(request_wiphy
->regd
, regd
);
2153 reset_regdomains(false, rd
);
2157 /* Intersection requires a bit more work */
2159 if (lr
->initiator
!= NL80211_REGDOM_SET_BY_COUNTRY_IE
) {
2160 intersected_rd
= regdom_intersect(rd
, get_cfg80211_regdom());
2161 if (!intersected_rd
)
2165 * We can trash what CRDA provided now.
2166 * However if a driver requested this specific regulatory
2167 * domain we keep it for its private use
2169 if (lr
->initiator
== NL80211_REGDOM_SET_BY_DRIVER
) {
2170 const struct ieee80211_regdomain
*tmp
;
2172 tmp
= get_wiphy_regdom(request_wiphy
);
2173 rcu_assign_pointer(request_wiphy
->regd
, rd
);
2174 rcu_free_regdom(tmp
);
2181 reset_regdomains(false, intersected_rd
);
2191 * Use this call to set the current regulatory domain. Conflicts with
2192 * multiple drivers can be ironed out later. Caller must've already
2193 * kmalloc'd the rd structure.
2195 int set_regdom(const struct ieee80211_regdomain
*rd
)
2197 struct regulatory_request
*lr
;
2200 lr
= get_last_request();
2202 /* Note that this doesn't update the wiphys, this is done below */
2203 r
= __set_regdom(rd
);
2206 reg_set_request_processed();
2212 /* This would make this whole thing pointless */
2213 if (WARN_ON(!lr
->intersect
&& rd
!= get_cfg80211_regdom()))
2216 /* update all wiphys now with the new established regulatory domain */
2217 update_all_wiphy_regulatory(lr
->initiator
);
2219 print_regdomain(get_cfg80211_regdom());
2221 nl80211_send_reg_change_event(lr
);
2223 reg_set_request_processed();
2228 int reg_device_uevent(struct device
*dev
, struct kobj_uevent_env
*env
)
2230 struct regulatory_request
*lr
;
2235 lr
= get_last_request();
2236 if (lr
&& !lr
->processed
) {
2237 memcpy(alpha2
, lr
->alpha2
, 2);
2243 return add_uevent_var(env
, "COUNTRY=%c%c",
2244 alpha2
[0], alpha2
[1]);
2248 void wiphy_regulatory_register(struct wiphy
*wiphy
)
2250 if (!reg_dev_ignore_cell_hint(wiphy
))
2251 reg_num_devs_support_basehint
++;
2253 wiphy_update_regulatory(wiphy
, NL80211_REGDOM_SET_BY_CORE
);
2256 void wiphy_regulatory_deregister(struct wiphy
*wiphy
)
2258 struct wiphy
*request_wiphy
= NULL
;
2259 struct regulatory_request
*lr
;
2261 lr
= get_last_request();
2263 if (!reg_dev_ignore_cell_hint(wiphy
))
2264 reg_num_devs_support_basehint
--;
2266 rcu_free_regdom(get_wiphy_regdom(wiphy
));
2267 rcu_assign_pointer(wiphy
->regd
, NULL
);
2270 request_wiphy
= wiphy_idx_to_wiphy(lr
->wiphy_idx
);
2272 if (!request_wiphy
|| request_wiphy
!= wiphy
)
2275 lr
->wiphy_idx
= WIPHY_IDX_INVALID
;
2276 lr
->country_ie_env
= ENVIRON_ANY
;
2279 static void reg_timeout_work(struct work_struct
*work
)
2281 REG_DBG_PRINT("Timeout while waiting for CRDA to reply, restoring regulatory settings\n");
2283 restore_regulatory_settings(true);
2287 int __init
regulatory_init(void)
2291 reg_pdev
= platform_device_register_simple("regulatory", 0, NULL
, 0);
2292 if (IS_ERR(reg_pdev
))
2293 return PTR_ERR(reg_pdev
);
2295 reg_pdev
->dev
.type
= ®_device_type
;
2297 spin_lock_init(®_requests_lock
);
2298 spin_lock_init(®_pending_beacons_lock
);
2300 reg_regdb_size_check();
2302 rcu_assign_pointer(cfg80211_regdomain
, cfg80211_world_regdom
);
2304 user_alpha2
[0] = '9';
2305 user_alpha2
[1] = '7';
2307 /* We always try to get an update for the static regdomain */
2308 err
= regulatory_hint_core(cfg80211_world_regdom
->alpha2
);
2313 * N.B. kobject_uevent_env() can fail mainly for when we're out
2314 * memory which is handled and propagated appropriately above
2315 * but it can also fail during a netlink_broadcast() or during
2316 * early boot for call_usermodehelper(). For now treat these
2317 * errors as non-fatal.
2319 pr_err("kobject_uevent_env() was unable to call CRDA during init\n");
2323 * Finally, if the user set the module parameter treat it
2326 if (!is_world_regdom(ieee80211_regdom
))
2327 regulatory_hint_user(ieee80211_regdom
,
2328 NL80211_USER_REG_HINT_USER
);
2333 void regulatory_exit(void)
2335 struct regulatory_request
*reg_request
, *tmp
;
2336 struct reg_beacon
*reg_beacon
, *btmp
;
2338 cancel_work_sync(®_work
);
2339 cancel_delayed_work_sync(®_timeout
);
2341 /* Lock to suppress warnings */
2343 reset_regdomains(true, NULL
);
2346 dev_set_uevent_suppress(®_pdev
->dev
, true);
2348 platform_device_unregister(reg_pdev
);
2350 list_for_each_entry_safe(reg_beacon
, btmp
, ®_pending_beacons
, list
) {
2351 list_del(®_beacon
->list
);
2355 list_for_each_entry_safe(reg_beacon
, btmp
, ®_beacon_list
, list
) {
2356 list_del(®_beacon
->list
);
2360 list_for_each_entry_safe(reg_request
, tmp
, ®_requests_list
, list
) {
2361 list_del(®_request
->list
);