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,
167 /* IEEE 802.11 channel 14 - Only JP enables
168 * this and for 802.11b only */
169 REG_RULE(2484-10, 2484+10, 20, 6, 20,
171 NL80211_RRF_NO_OFDM
),
172 /* IEEE 802.11a, channel 36..48 */
173 REG_RULE(5180-10, 5240+10, 160, 6, 20,
176 /* IEEE 802.11a, channel 52..64 - DFS required */
177 REG_RULE(5260-10, 5320+10, 160, 6, 20,
181 /* IEEE 802.11a, channel 100..144 - DFS required */
182 REG_RULE(5500-10, 5720+10, 160, 6, 20,
186 /* IEEE 802.11a, channel 149..165 */
187 REG_RULE(5745-10, 5825+10, 80, 6, 20,
190 /* IEEE 802.11ad (60gHz), channels 1..3 */
191 REG_RULE(56160+2160*1-1080, 56160+2160*3+1080, 2160, 0, 0, 0),
195 /* protected by RTNL */
196 static const struct ieee80211_regdomain
*cfg80211_world_regdom
=
199 static char *ieee80211_regdom
= "00";
200 static char user_alpha2
[2];
202 module_param(ieee80211_regdom
, charp
, 0444);
203 MODULE_PARM_DESC(ieee80211_regdom
, "IEEE 802.11 regulatory domain code");
205 static void reg_kfree_last_request(void)
207 struct regulatory_request
*lr
;
209 lr
= get_last_request();
211 if (lr
!= &core_request_world
&& lr
)
212 kfree_rcu(lr
, rcu_head
);
215 static void reg_update_last_request(struct regulatory_request
*request
)
217 reg_kfree_last_request();
218 rcu_assign_pointer(last_request
, request
);
221 static void reset_regdomains(bool full_reset
,
222 const struct ieee80211_regdomain
*new_regdom
)
224 const struct ieee80211_regdomain
*r
;
228 r
= get_cfg80211_regdom();
230 /* avoid freeing static information or freeing something twice */
231 if (r
== cfg80211_world_regdom
)
233 if (cfg80211_world_regdom
== &world_regdom
)
234 cfg80211_world_regdom
= NULL
;
235 if (r
== &world_regdom
)
239 rcu_free_regdom(cfg80211_world_regdom
);
241 cfg80211_world_regdom
= &world_regdom
;
242 rcu_assign_pointer(cfg80211_regdomain
, new_regdom
);
247 reg_update_last_request(&core_request_world
);
251 * Dynamic world regulatory domain requested by the wireless
252 * core upon initialization
254 static void update_world_regdomain(const struct ieee80211_regdomain
*rd
)
256 struct regulatory_request
*lr
;
258 lr
= get_last_request();
262 reset_regdomains(false, rd
);
264 cfg80211_world_regdom
= rd
;
267 bool is_world_regdom(const char *alpha2
)
271 return alpha2
[0] == '0' && alpha2
[1] == '0';
274 static bool is_alpha2_set(const char *alpha2
)
278 return alpha2
[0] && alpha2
[1];
281 static bool is_unknown_alpha2(const char *alpha2
)
286 * Special case where regulatory domain was built by driver
287 * but a specific alpha2 cannot be determined
289 return alpha2
[0] == '9' && alpha2
[1] == '9';
292 static bool is_intersected_alpha2(const char *alpha2
)
297 * Special case where regulatory domain is the
298 * result of an intersection between two regulatory domain
301 return alpha2
[0] == '9' && alpha2
[1] == '8';
304 static bool is_an_alpha2(const char *alpha2
)
308 return isalpha(alpha2
[0]) && isalpha(alpha2
[1]);
311 static bool alpha2_equal(const char *alpha2_x
, const char *alpha2_y
)
313 if (!alpha2_x
|| !alpha2_y
)
315 return alpha2_x
[0] == alpha2_y
[0] && alpha2_x
[1] == alpha2_y
[1];
318 static bool regdom_changes(const char *alpha2
)
320 const struct ieee80211_regdomain
*r
= get_cfg80211_regdom();
324 return !alpha2_equal(r
->alpha2
, alpha2
);
328 * The NL80211_REGDOM_SET_BY_USER regdom alpha2 is cached, this lets
329 * you know if a valid regulatory hint with NL80211_REGDOM_SET_BY_USER
330 * has ever been issued.
332 static bool is_user_regdom_saved(void)
334 if (user_alpha2
[0] == '9' && user_alpha2
[1] == '7')
337 /* This would indicate a mistake on the design */
338 if (WARN(!is_world_regdom(user_alpha2
) && !is_an_alpha2(user_alpha2
),
339 "Unexpected user alpha2: %c%c\n",
340 user_alpha2
[0], user_alpha2
[1]))
346 static const struct ieee80211_regdomain
*
347 reg_copy_regd(const struct ieee80211_regdomain
*src_regd
)
349 struct ieee80211_regdomain
*regd
;
354 sizeof(struct ieee80211_regdomain
) +
355 src_regd
->n_reg_rules
* sizeof(struct ieee80211_reg_rule
);
357 regd
= kzalloc(size_of_regd
, GFP_KERNEL
);
359 return ERR_PTR(-ENOMEM
);
361 memcpy(regd
, src_regd
, sizeof(struct ieee80211_regdomain
));
363 for (i
= 0; i
< src_regd
->n_reg_rules
; i
++)
364 memcpy(®d
->reg_rules
[i
], &src_regd
->reg_rules
[i
],
365 sizeof(struct ieee80211_reg_rule
));
370 #ifdef CONFIG_CFG80211_INTERNAL_REGDB
371 struct reg_regdb_search_request
{
373 struct list_head list
;
376 static LIST_HEAD(reg_regdb_search_list
);
377 static DEFINE_MUTEX(reg_regdb_search_mutex
);
379 static void reg_regdb_search(struct work_struct
*work
)
381 struct reg_regdb_search_request
*request
;
382 const struct ieee80211_regdomain
*curdom
, *regdom
= NULL
;
387 mutex_lock(®_regdb_search_mutex
);
388 while (!list_empty(®_regdb_search_list
)) {
389 request
= list_first_entry(®_regdb_search_list
,
390 struct reg_regdb_search_request
,
392 list_del(&request
->list
);
394 for (i
= 0; i
< reg_regdb_size
; i
++) {
395 curdom
= reg_regdb
[i
];
397 if (alpha2_equal(request
->alpha2
, curdom
->alpha2
)) {
398 regdom
= reg_copy_regd(curdom
);
405 mutex_unlock(®_regdb_search_mutex
);
407 if (!IS_ERR_OR_NULL(regdom
))
413 static DECLARE_WORK(reg_regdb_work
, reg_regdb_search
);
415 static void reg_regdb_query(const char *alpha2
)
417 struct reg_regdb_search_request
*request
;
422 request
= kzalloc(sizeof(struct reg_regdb_search_request
), GFP_KERNEL
);
426 memcpy(request
->alpha2
, alpha2
, 2);
428 mutex_lock(®_regdb_search_mutex
);
429 list_add_tail(&request
->list
, ®_regdb_search_list
);
430 mutex_unlock(®_regdb_search_mutex
);
432 schedule_work(®_regdb_work
);
435 /* Feel free to add any other sanity checks here */
436 static void reg_regdb_size_check(void)
438 /* We should ideally BUILD_BUG_ON() but then random builds would fail */
439 WARN_ONCE(!reg_regdb_size
, "db.txt is empty, you should update it...");
442 static inline void reg_regdb_size_check(void) {}
443 static inline void reg_regdb_query(const char *alpha2
) {}
444 #endif /* CONFIG_CFG80211_INTERNAL_REGDB */
447 * This lets us keep regulatory code which is updated on a regulatory
448 * basis in userspace. Country information is filled in by
451 static int call_crda(const char *alpha2
)
453 if (!is_world_regdom((char *) alpha2
))
454 pr_info("Calling CRDA for country: %c%c\n",
455 alpha2
[0], alpha2
[1]);
457 pr_info("Calling CRDA to update world regulatory domain\n");
459 /* query internal regulatory database (if it exists) */
460 reg_regdb_query(alpha2
);
462 return kobject_uevent(®_pdev
->dev
.kobj
, KOBJ_CHANGE
);
465 static enum reg_request_treatment
466 reg_call_crda(struct regulatory_request
*request
)
468 if (call_crda(request
->alpha2
))
469 return REG_REQ_IGNORE
;
473 bool reg_is_valid_request(const char *alpha2
)
475 struct regulatory_request
*lr
= get_last_request();
477 if (!lr
|| lr
->processed
)
480 return alpha2_equal(lr
->alpha2
, alpha2
);
483 /* Sanity check on a regulatory rule */
484 static bool is_valid_reg_rule(const struct ieee80211_reg_rule
*rule
)
486 const struct ieee80211_freq_range
*freq_range
= &rule
->freq_range
;
489 if (freq_range
->start_freq_khz
<= 0 || freq_range
->end_freq_khz
<= 0)
492 if (freq_range
->start_freq_khz
> freq_range
->end_freq_khz
)
495 freq_diff
= freq_range
->end_freq_khz
- freq_range
->start_freq_khz
;
497 if (freq_range
->end_freq_khz
<= freq_range
->start_freq_khz
||
498 freq_range
->max_bandwidth_khz
> freq_diff
)
504 static bool is_valid_rd(const struct ieee80211_regdomain
*rd
)
506 const struct ieee80211_reg_rule
*reg_rule
= NULL
;
509 if (!rd
->n_reg_rules
)
512 if (WARN_ON(rd
->n_reg_rules
> NL80211_MAX_SUPP_REG_RULES
))
515 for (i
= 0; i
< rd
->n_reg_rules
; i
++) {
516 reg_rule
= &rd
->reg_rules
[i
];
517 if (!is_valid_reg_rule(reg_rule
))
524 static bool reg_does_bw_fit(const struct ieee80211_freq_range
*freq_range
,
525 u32 center_freq_khz
, u32 bw_khz
)
527 u32 start_freq_khz
, end_freq_khz
;
529 start_freq_khz
= center_freq_khz
- (bw_khz
/2);
530 end_freq_khz
= center_freq_khz
+ (bw_khz
/2);
532 if (start_freq_khz
>= freq_range
->start_freq_khz
&&
533 end_freq_khz
<= freq_range
->end_freq_khz
)
540 * freq_in_rule_band - tells us if a frequency is in a frequency band
541 * @freq_range: frequency rule we want to query
542 * @freq_khz: frequency we are inquiring about
544 * This lets us know if a specific frequency rule is or is not relevant to
545 * a specific frequency's band. Bands are device specific and artificial
546 * definitions (the "2.4 GHz band", the "5 GHz band" and the "60GHz band"),
547 * however it is safe for now to assume that a frequency rule should not be
548 * part of a frequency's band if the start freq or end freq are off by more
549 * than 2 GHz for the 2.4 and 5 GHz bands, and by more than 10 GHz for the
551 * This resolution can be lowered and should be considered as we add
552 * regulatory rule support for other "bands".
554 static bool freq_in_rule_band(const struct ieee80211_freq_range
*freq_range
,
557 #define ONE_GHZ_IN_KHZ 1000000
559 * From 802.11ad: directional multi-gigabit (DMG):
560 * Pertaining to operation in a frequency band containing a channel
561 * with the Channel starting frequency above 45 GHz.
563 u32 limit
= freq_khz
> 45 * ONE_GHZ_IN_KHZ
?
564 10 * ONE_GHZ_IN_KHZ
: 2 * ONE_GHZ_IN_KHZ
;
565 if (abs(freq_khz
- freq_range
->start_freq_khz
) <= limit
)
567 if (abs(freq_khz
- freq_range
->end_freq_khz
) <= limit
)
570 #undef ONE_GHZ_IN_KHZ
574 * Helper for regdom_intersect(), this does the real
575 * mathematical intersection fun
577 static int reg_rules_intersect(const struct ieee80211_reg_rule
*rule1
,
578 const struct ieee80211_reg_rule
*rule2
,
579 struct ieee80211_reg_rule
*intersected_rule
)
581 const struct ieee80211_freq_range
*freq_range1
, *freq_range2
;
582 struct ieee80211_freq_range
*freq_range
;
583 const struct ieee80211_power_rule
*power_rule1
, *power_rule2
;
584 struct ieee80211_power_rule
*power_rule
;
587 freq_range1
= &rule1
->freq_range
;
588 freq_range2
= &rule2
->freq_range
;
589 freq_range
= &intersected_rule
->freq_range
;
591 power_rule1
= &rule1
->power_rule
;
592 power_rule2
= &rule2
->power_rule
;
593 power_rule
= &intersected_rule
->power_rule
;
595 freq_range
->start_freq_khz
= max(freq_range1
->start_freq_khz
,
596 freq_range2
->start_freq_khz
);
597 freq_range
->end_freq_khz
= min(freq_range1
->end_freq_khz
,
598 freq_range2
->end_freq_khz
);
599 freq_range
->max_bandwidth_khz
= min(freq_range1
->max_bandwidth_khz
,
600 freq_range2
->max_bandwidth_khz
);
602 freq_diff
= freq_range
->end_freq_khz
- freq_range
->start_freq_khz
;
603 if (freq_range
->max_bandwidth_khz
> freq_diff
)
604 freq_range
->max_bandwidth_khz
= freq_diff
;
606 power_rule
->max_eirp
= min(power_rule1
->max_eirp
,
607 power_rule2
->max_eirp
);
608 power_rule
->max_antenna_gain
= min(power_rule1
->max_antenna_gain
,
609 power_rule2
->max_antenna_gain
);
611 intersected_rule
->flags
= rule1
->flags
| rule2
->flags
;
613 if (!is_valid_reg_rule(intersected_rule
))
620 * regdom_intersect - do the intersection between two regulatory domains
621 * @rd1: first regulatory domain
622 * @rd2: second regulatory domain
624 * Use this function to get the intersection between two regulatory domains.
625 * Once completed we will mark the alpha2 for the rd as intersected, "98",
626 * as no one single alpha2 can represent this regulatory domain.
628 * Returns a pointer to the regulatory domain structure which will hold the
629 * resulting intersection of rules between rd1 and rd2. We will
630 * kzalloc() this structure for you.
632 static struct ieee80211_regdomain
*
633 regdom_intersect(const struct ieee80211_regdomain
*rd1
,
634 const struct ieee80211_regdomain
*rd2
)
638 unsigned int num_rules
= 0, rule_idx
= 0;
639 const struct ieee80211_reg_rule
*rule1
, *rule2
;
640 struct ieee80211_reg_rule
*intersected_rule
;
641 struct ieee80211_regdomain
*rd
;
642 /* This is just a dummy holder to help us count */
643 struct ieee80211_reg_rule dummy_rule
;
649 * First we get a count of the rules we'll need, then we actually
650 * build them. This is to so we can malloc() and free() a
651 * regdomain once. The reason we use reg_rules_intersect() here
652 * is it will return -EINVAL if the rule computed makes no sense.
653 * All rules that do check out OK are valid.
656 for (x
= 0; x
< rd1
->n_reg_rules
; x
++) {
657 rule1
= &rd1
->reg_rules
[x
];
658 for (y
= 0; y
< rd2
->n_reg_rules
; y
++) {
659 rule2
= &rd2
->reg_rules
[y
];
660 if (!reg_rules_intersect(rule1
, rule2
, &dummy_rule
))
668 size_of_regd
= sizeof(struct ieee80211_regdomain
) +
669 num_rules
* sizeof(struct ieee80211_reg_rule
);
671 rd
= kzalloc(size_of_regd
, GFP_KERNEL
);
675 for (x
= 0; x
< rd1
->n_reg_rules
&& rule_idx
< num_rules
; x
++) {
676 rule1
= &rd1
->reg_rules
[x
];
677 for (y
= 0; y
< rd2
->n_reg_rules
&& rule_idx
< num_rules
; y
++) {
678 rule2
= &rd2
->reg_rules
[y
];
680 * This time around instead of using the stack lets
681 * write to the target rule directly saving ourselves
684 intersected_rule
= &rd
->reg_rules
[rule_idx
];
685 r
= reg_rules_intersect(rule1
, rule2
, intersected_rule
);
687 * No need to memset here the intersected rule here as
688 * we're not using the stack anymore
696 if (rule_idx
!= num_rules
) {
701 rd
->n_reg_rules
= num_rules
;
709 * XXX: add support for the rest of enum nl80211_reg_rule_flags, we may
710 * want to just have the channel structure use these
712 static u32
map_regdom_flags(u32 rd_flags
)
714 u32 channel_flags
= 0;
715 if (rd_flags
& NL80211_RRF_NO_IR_ALL
)
716 channel_flags
|= IEEE80211_CHAN_NO_IR
;
717 if (rd_flags
& NL80211_RRF_DFS
)
718 channel_flags
|= IEEE80211_CHAN_RADAR
;
719 if (rd_flags
& NL80211_RRF_NO_OFDM
)
720 channel_flags
|= IEEE80211_CHAN_NO_OFDM
;
721 return channel_flags
;
724 static const struct ieee80211_reg_rule
*
725 freq_reg_info_regd(struct wiphy
*wiphy
, u32 center_freq
,
726 const struct ieee80211_regdomain
*regd
)
729 bool band_rule_found
= false;
730 bool bw_fits
= false;
733 return ERR_PTR(-EINVAL
);
735 for (i
= 0; i
< regd
->n_reg_rules
; i
++) {
736 const struct ieee80211_reg_rule
*rr
;
737 const struct ieee80211_freq_range
*fr
= NULL
;
739 rr
= ®d
->reg_rules
[i
];
740 fr
= &rr
->freq_range
;
743 * We only need to know if one frequency rule was
744 * was in center_freq's band, that's enough, so lets
745 * not overwrite it once found
747 if (!band_rule_found
)
748 band_rule_found
= freq_in_rule_band(fr
, center_freq
);
750 bw_fits
= reg_does_bw_fit(fr
, center_freq
, MHZ_TO_KHZ(20));
752 if (band_rule_found
&& bw_fits
)
756 if (!band_rule_found
)
757 return ERR_PTR(-ERANGE
);
759 return ERR_PTR(-EINVAL
);
762 const struct ieee80211_reg_rule
*freq_reg_info(struct wiphy
*wiphy
,
765 const struct ieee80211_regdomain
*regd
;
766 struct regulatory_request
*lr
= get_last_request();
769 * Follow the driver's regulatory domain, if present, unless a country
770 * IE has been processed or a user wants to help complaince further
772 if (lr
->initiator
!= NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
773 lr
->initiator
!= NL80211_REGDOM_SET_BY_USER
&&
775 regd
= get_wiphy_regdom(wiphy
);
777 regd
= get_cfg80211_regdom();
779 return freq_reg_info_regd(wiphy
, center_freq
, regd
);
781 EXPORT_SYMBOL(freq_reg_info
);
783 const char *reg_initiator_name(enum nl80211_reg_initiator initiator
)
786 case NL80211_REGDOM_SET_BY_CORE
:
788 case NL80211_REGDOM_SET_BY_USER
:
790 case NL80211_REGDOM_SET_BY_DRIVER
:
792 case NL80211_REGDOM_SET_BY_COUNTRY_IE
:
799 EXPORT_SYMBOL(reg_initiator_name
);
801 #ifdef CONFIG_CFG80211_REG_DEBUG
802 static void chan_reg_rule_print_dbg(struct ieee80211_channel
*chan
,
803 const struct ieee80211_reg_rule
*reg_rule
)
805 const struct ieee80211_power_rule
*power_rule
;
806 const struct ieee80211_freq_range
*freq_range
;
807 char max_antenna_gain
[32];
809 power_rule
= ®_rule
->power_rule
;
810 freq_range
= ®_rule
->freq_range
;
812 if (!power_rule
->max_antenna_gain
)
813 snprintf(max_antenna_gain
, 32, "N/A");
815 snprintf(max_antenna_gain
, 32, "%d", power_rule
->max_antenna_gain
);
817 REG_DBG_PRINT("Updating information on frequency %d MHz with regulatory rule:\n",
820 REG_DBG_PRINT("%d KHz - %d KHz @ %d KHz), (%s mBi, %d mBm)\n",
821 freq_range
->start_freq_khz
, freq_range
->end_freq_khz
,
822 freq_range
->max_bandwidth_khz
, max_antenna_gain
,
823 power_rule
->max_eirp
);
826 static void chan_reg_rule_print_dbg(struct ieee80211_channel
*chan
,
827 const struct ieee80211_reg_rule
*reg_rule
)
834 * Note that right now we assume the desired channel bandwidth
835 * is always 20 MHz for each individual channel (HT40 uses 20 MHz
836 * per channel, the primary and the extension channel).
838 static void handle_channel(struct wiphy
*wiphy
,
839 enum nl80211_reg_initiator initiator
,
840 struct ieee80211_channel
*chan
)
842 u32 flags
, bw_flags
= 0;
843 const struct ieee80211_reg_rule
*reg_rule
= NULL
;
844 const struct ieee80211_power_rule
*power_rule
= NULL
;
845 const struct ieee80211_freq_range
*freq_range
= NULL
;
846 struct wiphy
*request_wiphy
= NULL
;
847 struct regulatory_request
*lr
= get_last_request();
849 request_wiphy
= wiphy_idx_to_wiphy(lr
->wiphy_idx
);
851 flags
= chan
->orig_flags
;
853 reg_rule
= freq_reg_info(wiphy
, MHZ_TO_KHZ(chan
->center_freq
));
854 if (IS_ERR(reg_rule
)) {
856 * We will disable all channels that do not match our
857 * received regulatory rule unless the hint is coming
858 * from a Country IE and the Country IE had no information
859 * about a band. The IEEE 802.11 spec allows for an AP
860 * to send only a subset of the regulatory rules allowed,
861 * so an AP in the US that only supports 2.4 GHz may only send
862 * a country IE with information for the 2.4 GHz band
863 * while 5 GHz is still supported.
865 if (initiator
== NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
866 PTR_ERR(reg_rule
) == -ERANGE
)
869 if (lr
->initiator
== NL80211_REGDOM_SET_BY_DRIVER
&&
870 request_wiphy
&& request_wiphy
== wiphy
&&
871 request_wiphy
->regulatory_flags
& REGULATORY_STRICT_REG
) {
872 REG_DBG_PRINT("Disabling freq %d MHz for good\n",
874 chan
->orig_flags
|= IEEE80211_CHAN_DISABLED
;
875 chan
->flags
= chan
->orig_flags
;
877 REG_DBG_PRINT("Disabling freq %d MHz\n",
879 chan
->flags
|= IEEE80211_CHAN_DISABLED
;
884 chan_reg_rule_print_dbg(chan
, reg_rule
);
886 power_rule
= ®_rule
->power_rule
;
887 freq_range
= ®_rule
->freq_range
;
889 if (freq_range
->max_bandwidth_khz
< MHZ_TO_KHZ(40))
890 bw_flags
= IEEE80211_CHAN_NO_HT40
;
891 if (freq_range
->max_bandwidth_khz
< MHZ_TO_KHZ(80))
892 bw_flags
|= IEEE80211_CHAN_NO_80MHZ
;
893 if (freq_range
->max_bandwidth_khz
< MHZ_TO_KHZ(160))
894 bw_flags
|= IEEE80211_CHAN_NO_160MHZ
;
896 if (lr
->initiator
== NL80211_REGDOM_SET_BY_DRIVER
&&
897 request_wiphy
&& request_wiphy
== wiphy
&&
898 request_wiphy
->regulatory_flags
& REGULATORY_STRICT_REG
) {
900 * This guarantees the driver's requested regulatory domain
901 * will always be used as a base for further regulatory
904 chan
->flags
= chan
->orig_flags
=
905 map_regdom_flags(reg_rule
->flags
) | bw_flags
;
906 chan
->max_antenna_gain
= chan
->orig_mag
=
907 (int) MBI_TO_DBI(power_rule
->max_antenna_gain
);
908 chan
->max_reg_power
= chan
->max_power
= chan
->orig_mpwr
=
909 (int) MBM_TO_DBM(power_rule
->max_eirp
);
913 chan
->dfs_state
= NL80211_DFS_USABLE
;
914 chan
->dfs_state_entered
= jiffies
;
916 chan
->beacon_found
= false;
917 chan
->flags
= flags
| bw_flags
| map_regdom_flags(reg_rule
->flags
);
918 chan
->max_antenna_gain
=
919 min_t(int, chan
->orig_mag
,
920 MBI_TO_DBI(power_rule
->max_antenna_gain
));
921 chan
->max_reg_power
= (int) MBM_TO_DBM(power_rule
->max_eirp
);
922 if (chan
->orig_mpwr
) {
924 * Devices that use REGULATORY_COUNTRY_IE_FOLLOW_POWER
925 * will always follow the passed country IE power settings.
927 if (initiator
== NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
928 wiphy
->regulatory_flags
& REGULATORY_COUNTRY_IE_FOLLOW_POWER
)
929 chan
->max_power
= chan
->max_reg_power
;
931 chan
->max_power
= min(chan
->orig_mpwr
,
932 chan
->max_reg_power
);
934 chan
->max_power
= chan
->max_reg_power
;
937 static void handle_band(struct wiphy
*wiphy
,
938 enum nl80211_reg_initiator initiator
,
939 struct ieee80211_supported_band
*sband
)
946 for (i
= 0; i
< sband
->n_channels
; i
++)
947 handle_channel(wiphy
, initiator
, &sband
->channels
[i
]);
950 static bool reg_request_cell_base(struct regulatory_request
*request
)
952 if (request
->initiator
!= NL80211_REGDOM_SET_BY_USER
)
954 return request
->user_reg_hint_type
== NL80211_USER_REG_HINT_CELL_BASE
;
957 bool reg_last_request_cell_base(void)
959 return reg_request_cell_base(get_last_request());
962 #ifdef CONFIG_CFG80211_CERTIFICATION_ONUS
963 /* Core specific check */
964 static enum reg_request_treatment
965 reg_ignore_cell_hint(struct regulatory_request
*pending_request
)
967 struct regulatory_request
*lr
= get_last_request();
969 if (!reg_num_devs_support_basehint
)
970 return REG_REQ_IGNORE
;
972 if (reg_request_cell_base(lr
) &&
973 !regdom_changes(pending_request
->alpha2
))
974 return REG_REQ_ALREADY_SET
;
979 /* Device specific check */
980 static bool reg_dev_ignore_cell_hint(struct wiphy
*wiphy
)
982 return !(wiphy
->features
& NL80211_FEATURE_CELL_BASE_REG_HINTS
);
985 static int reg_ignore_cell_hint(struct regulatory_request
*pending_request
)
987 return REG_REQ_IGNORE
;
990 static bool reg_dev_ignore_cell_hint(struct wiphy
*wiphy
)
996 static bool wiphy_strict_alpha2_regd(struct wiphy
*wiphy
)
998 if (wiphy
->regulatory_flags
& REGULATORY_STRICT_REG
&&
999 !(wiphy
->regulatory_flags
& REGULATORY_CUSTOM_REG
))
1004 static bool ignore_reg_update(struct wiphy
*wiphy
,
1005 enum nl80211_reg_initiator initiator
)
1007 struct regulatory_request
*lr
= get_last_request();
1010 REG_DBG_PRINT("Ignoring regulatory request set by %s "
1011 "since last_request is not set\n",
1012 reg_initiator_name(initiator
));
1016 if (initiator
== NL80211_REGDOM_SET_BY_CORE
&&
1017 wiphy
->regulatory_flags
& REGULATORY_CUSTOM_REG
) {
1018 REG_DBG_PRINT("Ignoring regulatory request set by %s "
1019 "since the driver uses its own custom "
1020 "regulatory domain\n",
1021 reg_initiator_name(initiator
));
1026 * wiphy->regd will be set once the device has its own
1027 * desired regulatory domain set
1029 if (wiphy_strict_alpha2_regd(wiphy
) && !wiphy
->regd
&&
1030 initiator
!= NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
1031 !is_world_regdom(lr
->alpha2
)) {
1032 REG_DBG_PRINT("Ignoring regulatory request set by %s "
1033 "since the driver requires its own regulatory "
1034 "domain to be set first\n",
1035 reg_initiator_name(initiator
));
1039 if (reg_request_cell_base(lr
))
1040 return reg_dev_ignore_cell_hint(wiphy
);
1045 static bool reg_is_world_roaming(struct wiphy
*wiphy
)
1047 const struct ieee80211_regdomain
*cr
= get_cfg80211_regdom();
1048 const struct ieee80211_regdomain
*wr
= get_wiphy_regdom(wiphy
);
1049 struct regulatory_request
*lr
= get_last_request();
1051 if (is_world_regdom(cr
->alpha2
) || (wr
&& is_world_regdom(wr
->alpha2
)))
1054 if (lr
&& lr
->initiator
!= NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
1055 wiphy
->regulatory_flags
& REGULATORY_CUSTOM_REG
)
1061 static void handle_reg_beacon(struct wiphy
*wiphy
, unsigned int chan_idx
,
1062 struct reg_beacon
*reg_beacon
)
1064 struct ieee80211_supported_band
*sband
;
1065 struct ieee80211_channel
*chan
;
1066 bool channel_changed
= false;
1067 struct ieee80211_channel chan_before
;
1069 sband
= wiphy
->bands
[reg_beacon
->chan
.band
];
1070 chan
= &sband
->channels
[chan_idx
];
1072 if (likely(chan
->center_freq
!= reg_beacon
->chan
.center_freq
))
1075 if (chan
->beacon_found
)
1078 chan
->beacon_found
= true;
1080 if (!reg_is_world_roaming(wiphy
))
1083 if (wiphy
->regulatory_flags
& REGULATORY_DISABLE_BEACON_HINTS
)
1086 chan_before
.center_freq
= chan
->center_freq
;
1087 chan_before
.flags
= chan
->flags
;
1089 if (chan
->flags
& IEEE80211_CHAN_NO_IR
) {
1090 chan
->flags
&= ~IEEE80211_CHAN_NO_IR
;
1091 channel_changed
= true;
1094 if (channel_changed
)
1095 nl80211_send_beacon_hint_event(wiphy
, &chan_before
, chan
);
1099 * Called when a scan on a wiphy finds a beacon on
1102 static void wiphy_update_new_beacon(struct wiphy
*wiphy
,
1103 struct reg_beacon
*reg_beacon
)
1106 struct ieee80211_supported_band
*sband
;
1108 if (!wiphy
->bands
[reg_beacon
->chan
.band
])
1111 sband
= wiphy
->bands
[reg_beacon
->chan
.band
];
1113 for (i
= 0; i
< sband
->n_channels
; i
++)
1114 handle_reg_beacon(wiphy
, i
, reg_beacon
);
1118 * Called upon reg changes or a new wiphy is added
1120 static void wiphy_update_beacon_reg(struct wiphy
*wiphy
)
1123 struct ieee80211_supported_band
*sband
;
1124 struct reg_beacon
*reg_beacon
;
1126 list_for_each_entry(reg_beacon
, ®_beacon_list
, list
) {
1127 if (!wiphy
->bands
[reg_beacon
->chan
.band
])
1129 sband
= wiphy
->bands
[reg_beacon
->chan
.band
];
1130 for (i
= 0; i
< sband
->n_channels
; i
++)
1131 handle_reg_beacon(wiphy
, i
, reg_beacon
);
1135 /* Reap the advantages of previously found beacons */
1136 static void reg_process_beacons(struct wiphy
*wiphy
)
1139 * Means we are just firing up cfg80211, so no beacons would
1140 * have been processed yet.
1144 wiphy_update_beacon_reg(wiphy
);
1147 static bool is_ht40_allowed(struct ieee80211_channel
*chan
)
1151 if (chan
->flags
& IEEE80211_CHAN_DISABLED
)
1153 /* This would happen when regulatory rules disallow HT40 completely */
1154 if ((chan
->flags
& IEEE80211_CHAN_NO_HT40
) == IEEE80211_CHAN_NO_HT40
)
1159 static void reg_process_ht_flags_channel(struct wiphy
*wiphy
,
1160 struct ieee80211_channel
*channel
)
1162 struct ieee80211_supported_band
*sband
= wiphy
->bands
[channel
->band
];
1163 struct ieee80211_channel
*channel_before
= NULL
, *channel_after
= NULL
;
1166 if (!is_ht40_allowed(channel
)) {
1167 channel
->flags
|= IEEE80211_CHAN_NO_HT40
;
1172 * We need to ensure the extension channels exist to
1173 * be able to use HT40- or HT40+, this finds them (or not)
1175 for (i
= 0; i
< sband
->n_channels
; i
++) {
1176 struct ieee80211_channel
*c
= &sband
->channels
[i
];
1178 if (c
->center_freq
== (channel
->center_freq
- 20))
1180 if (c
->center_freq
== (channel
->center_freq
+ 20))
1185 * Please note that this assumes target bandwidth is 20 MHz,
1186 * if that ever changes we also need to change the below logic
1187 * to include that as well.
1189 if (!is_ht40_allowed(channel_before
))
1190 channel
->flags
|= IEEE80211_CHAN_NO_HT40MINUS
;
1192 channel
->flags
&= ~IEEE80211_CHAN_NO_HT40MINUS
;
1194 if (!is_ht40_allowed(channel_after
))
1195 channel
->flags
|= IEEE80211_CHAN_NO_HT40PLUS
;
1197 channel
->flags
&= ~IEEE80211_CHAN_NO_HT40PLUS
;
1200 static void reg_process_ht_flags_band(struct wiphy
*wiphy
,
1201 struct ieee80211_supported_band
*sband
)
1208 for (i
= 0; i
< sband
->n_channels
; i
++)
1209 reg_process_ht_flags_channel(wiphy
, &sband
->channels
[i
]);
1212 static void reg_process_ht_flags(struct wiphy
*wiphy
)
1214 enum ieee80211_band band
;
1219 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++)
1220 reg_process_ht_flags_band(wiphy
, wiphy
->bands
[band
]);
1223 static void reg_call_notifier(struct wiphy
*wiphy
,
1224 struct regulatory_request
*request
)
1226 if (wiphy
->reg_notifier
)
1227 wiphy
->reg_notifier(wiphy
, request
);
1230 static void wiphy_update_regulatory(struct wiphy
*wiphy
,
1231 enum nl80211_reg_initiator initiator
)
1233 enum ieee80211_band band
;
1234 struct regulatory_request
*lr
= get_last_request();
1236 if (ignore_reg_update(wiphy
, initiator
)) {
1238 * Regulatory updates set by CORE are ignored for custom
1239 * regulatory cards. Let us notify the changes to the driver,
1240 * as some drivers used this to restore its orig_* reg domain.
1242 if (initiator
== NL80211_REGDOM_SET_BY_CORE
&&
1243 wiphy
->regulatory_flags
& REGULATORY_CUSTOM_REG
)
1244 reg_call_notifier(wiphy
, lr
);
1248 lr
->dfs_region
= get_cfg80211_regdom()->dfs_region
;
1250 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++)
1251 handle_band(wiphy
, initiator
, wiphy
->bands
[band
]);
1253 reg_process_beacons(wiphy
);
1254 reg_process_ht_flags(wiphy
);
1255 reg_call_notifier(wiphy
, lr
);
1258 static void update_all_wiphy_regulatory(enum nl80211_reg_initiator initiator
)
1260 struct cfg80211_registered_device
*rdev
;
1261 struct wiphy
*wiphy
;
1265 list_for_each_entry(rdev
, &cfg80211_rdev_list
, list
) {
1266 wiphy
= &rdev
->wiphy
;
1267 wiphy_update_regulatory(wiphy
, initiator
);
1271 static void handle_channel_custom(struct wiphy
*wiphy
,
1272 struct ieee80211_channel
*chan
,
1273 const struct ieee80211_regdomain
*regd
)
1276 const struct ieee80211_reg_rule
*reg_rule
= NULL
;
1277 const struct ieee80211_power_rule
*power_rule
= NULL
;
1278 const struct ieee80211_freq_range
*freq_range
= NULL
;
1280 reg_rule
= freq_reg_info_regd(wiphy
, MHZ_TO_KHZ(chan
->center_freq
),
1283 if (IS_ERR(reg_rule
)) {
1284 REG_DBG_PRINT("Disabling freq %d MHz as custom regd has no rule that fits it\n",
1286 chan
->orig_flags
|= IEEE80211_CHAN_DISABLED
;
1287 chan
->flags
= chan
->orig_flags
;
1291 chan_reg_rule_print_dbg(chan
, reg_rule
);
1293 power_rule
= ®_rule
->power_rule
;
1294 freq_range
= ®_rule
->freq_range
;
1296 if (freq_range
->max_bandwidth_khz
< MHZ_TO_KHZ(40))
1297 bw_flags
= IEEE80211_CHAN_NO_HT40
;
1298 if (freq_range
->max_bandwidth_khz
< MHZ_TO_KHZ(80))
1299 bw_flags
|= IEEE80211_CHAN_NO_80MHZ
;
1300 if (freq_range
->max_bandwidth_khz
< MHZ_TO_KHZ(160))
1301 bw_flags
|= IEEE80211_CHAN_NO_160MHZ
;
1303 chan
->flags
|= map_regdom_flags(reg_rule
->flags
) | bw_flags
;
1304 chan
->max_antenna_gain
= (int) MBI_TO_DBI(power_rule
->max_antenna_gain
);
1305 chan
->max_reg_power
= chan
->max_power
=
1306 (int) MBM_TO_DBM(power_rule
->max_eirp
);
1309 static void handle_band_custom(struct wiphy
*wiphy
,
1310 struct ieee80211_supported_band
*sband
,
1311 const struct ieee80211_regdomain
*regd
)
1318 for (i
= 0; i
< sband
->n_channels
; i
++)
1319 handle_channel_custom(wiphy
, &sband
->channels
[i
], regd
);
1322 /* Used by drivers prior to wiphy registration */
1323 void wiphy_apply_custom_regulatory(struct wiphy
*wiphy
,
1324 const struct ieee80211_regdomain
*regd
)
1326 enum ieee80211_band band
;
1327 unsigned int bands_set
= 0;
1329 WARN(!(wiphy
->regulatory_flags
& REGULATORY_CUSTOM_REG
),
1330 "wiphy should have REGULATORY_CUSTOM_REG\n");
1331 wiphy
->regulatory_flags
|= REGULATORY_CUSTOM_REG
;
1333 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++) {
1334 if (!wiphy
->bands
[band
])
1336 handle_band_custom(wiphy
, wiphy
->bands
[band
], regd
);
1341 * no point in calling this if it won't have any effect
1342 * on your device's supported bands.
1344 WARN_ON(!bands_set
);
1346 EXPORT_SYMBOL(wiphy_apply_custom_regulatory
);
1348 static void reg_set_request_processed(void)
1350 bool need_more_processing
= false;
1351 struct regulatory_request
*lr
= get_last_request();
1353 lr
->processed
= true;
1355 spin_lock(®_requests_lock
);
1356 if (!list_empty(®_requests_list
))
1357 need_more_processing
= true;
1358 spin_unlock(®_requests_lock
);
1360 if (lr
->initiator
== NL80211_REGDOM_SET_BY_USER
)
1361 cancel_delayed_work(®_timeout
);
1363 if (need_more_processing
)
1364 schedule_work(®_work
);
1368 * reg_process_hint_core - process core regulatory requests
1369 * @pending_request: a pending core regulatory request
1371 * The wireless subsystem can use this function to process
1372 * a regulatory request issued by the regulatory core.
1374 * Returns one of the different reg request treatment values.
1376 static enum reg_request_treatment
1377 reg_process_hint_core(struct regulatory_request
*core_request
)
1380 core_request
->intersect
= false;
1381 core_request
->processed
= false;
1383 reg_update_last_request(core_request
);
1385 return reg_call_crda(core_request
);
1388 static enum reg_request_treatment
1389 __reg_process_hint_user(struct regulatory_request
*user_request
)
1391 struct regulatory_request
*lr
= get_last_request();
1393 if (reg_request_cell_base(user_request
))
1394 return reg_ignore_cell_hint(user_request
);
1396 if (reg_request_cell_base(lr
))
1397 return REG_REQ_IGNORE
;
1399 if (lr
->initiator
== NL80211_REGDOM_SET_BY_COUNTRY_IE
)
1400 return REG_REQ_INTERSECT
;
1402 * If the user knows better the user should set the regdom
1403 * to their country before the IE is picked up
1405 if (lr
->initiator
== NL80211_REGDOM_SET_BY_USER
&&
1407 return REG_REQ_IGNORE
;
1409 * Process user requests only after previous user/driver/core
1410 * requests have been processed
1412 if ((lr
->initiator
== NL80211_REGDOM_SET_BY_CORE
||
1413 lr
->initiator
== NL80211_REGDOM_SET_BY_DRIVER
||
1414 lr
->initiator
== NL80211_REGDOM_SET_BY_USER
) &&
1415 regdom_changes(lr
->alpha2
))
1416 return REG_REQ_IGNORE
;
1418 if (!regdom_changes(user_request
->alpha2
))
1419 return REG_REQ_ALREADY_SET
;
1425 * reg_process_hint_user - process user regulatory requests
1426 * @user_request: a pending user regulatory request
1428 * The wireless subsystem can use this function to process
1429 * a regulatory request initiated by userspace.
1431 * Returns one of the different reg request treatment values.
1433 static enum reg_request_treatment
1434 reg_process_hint_user(struct regulatory_request
*user_request
)
1436 enum reg_request_treatment treatment
;
1438 treatment
= __reg_process_hint_user(user_request
);
1439 if (treatment
== REG_REQ_IGNORE
||
1440 treatment
== REG_REQ_ALREADY_SET
) {
1441 kfree(user_request
);
1445 user_request
->intersect
= treatment
== REG_REQ_INTERSECT
;
1446 user_request
->processed
= false;
1448 reg_update_last_request(user_request
);
1450 user_alpha2
[0] = user_request
->alpha2
[0];
1451 user_alpha2
[1] = user_request
->alpha2
[1];
1453 return reg_call_crda(user_request
);
1456 static enum reg_request_treatment
1457 __reg_process_hint_driver(struct regulatory_request
*driver_request
)
1459 struct regulatory_request
*lr
= get_last_request();
1461 if (lr
->initiator
== NL80211_REGDOM_SET_BY_CORE
) {
1462 if (regdom_changes(driver_request
->alpha2
))
1464 return REG_REQ_ALREADY_SET
;
1468 * This would happen if you unplug and plug your card
1469 * back in or if you add a new device for which the previously
1470 * loaded card also agrees on the regulatory domain.
1472 if (lr
->initiator
== NL80211_REGDOM_SET_BY_DRIVER
&&
1473 !regdom_changes(driver_request
->alpha2
))
1474 return REG_REQ_ALREADY_SET
;
1476 return REG_REQ_INTERSECT
;
1480 * reg_process_hint_driver - process driver regulatory requests
1481 * @driver_request: a pending driver regulatory request
1483 * The wireless subsystem can use this function to process
1484 * a regulatory request issued by an 802.11 driver.
1486 * Returns one of the different reg request treatment values.
1488 static enum reg_request_treatment
1489 reg_process_hint_driver(struct wiphy
*wiphy
,
1490 struct regulatory_request
*driver_request
)
1492 const struct ieee80211_regdomain
*regd
;
1493 enum reg_request_treatment treatment
;
1495 treatment
= __reg_process_hint_driver(driver_request
);
1497 switch (treatment
) {
1500 case REG_REQ_IGNORE
:
1501 kfree(driver_request
);
1503 case REG_REQ_INTERSECT
:
1505 case REG_REQ_ALREADY_SET
:
1506 regd
= reg_copy_regd(get_cfg80211_regdom());
1508 kfree(driver_request
);
1509 return REG_REQ_IGNORE
;
1511 rcu_assign_pointer(wiphy
->regd
, regd
);
1515 driver_request
->intersect
= treatment
== REG_REQ_INTERSECT
;
1516 driver_request
->processed
= false;
1518 reg_update_last_request(driver_request
);
1521 * Since CRDA will not be called in this case as we already
1522 * have applied the requested regulatory domain before we just
1523 * inform userspace we have processed the request
1525 if (treatment
== REG_REQ_ALREADY_SET
) {
1526 nl80211_send_reg_change_event(driver_request
);
1527 reg_set_request_processed();
1531 return reg_call_crda(driver_request
);
1534 static enum reg_request_treatment
1535 __reg_process_hint_country_ie(struct wiphy
*wiphy
,
1536 struct regulatory_request
*country_ie_request
)
1538 struct wiphy
*last_wiphy
= NULL
;
1539 struct regulatory_request
*lr
= get_last_request();
1541 if (reg_request_cell_base(lr
)) {
1542 /* Trust a Cell base station over the AP's country IE */
1543 if (regdom_changes(country_ie_request
->alpha2
))
1544 return REG_REQ_IGNORE
;
1545 return REG_REQ_ALREADY_SET
;
1547 if (wiphy
->regulatory_flags
& REGULATORY_COUNTRY_IE_IGNORE
)
1548 return REG_REQ_IGNORE
;
1551 if (unlikely(!is_an_alpha2(country_ie_request
->alpha2
)))
1554 if (lr
->initiator
!= NL80211_REGDOM_SET_BY_COUNTRY_IE
)
1557 last_wiphy
= wiphy_idx_to_wiphy(lr
->wiphy_idx
);
1559 if (last_wiphy
!= wiphy
) {
1561 * Two cards with two APs claiming different
1562 * Country IE alpha2s. We could
1563 * intersect them, but that seems unlikely
1564 * to be correct. Reject second one for now.
1566 if (regdom_changes(country_ie_request
->alpha2
))
1567 return REG_REQ_IGNORE
;
1568 return REG_REQ_ALREADY_SET
;
1571 * Two consecutive Country IE hints on the same wiphy.
1572 * This should be picked up early by the driver/stack
1574 if (WARN_ON(regdom_changes(country_ie_request
->alpha2
)))
1576 return REG_REQ_ALREADY_SET
;
1580 * reg_process_hint_country_ie - process regulatory requests from country IEs
1581 * @country_ie_request: a regulatory request from a country IE
1583 * The wireless subsystem can use this function to process
1584 * a regulatory request issued by a country Information Element.
1586 * Returns one of the different reg request treatment values.
1588 static enum reg_request_treatment
1589 reg_process_hint_country_ie(struct wiphy
*wiphy
,
1590 struct regulatory_request
*country_ie_request
)
1592 enum reg_request_treatment treatment
;
1594 treatment
= __reg_process_hint_country_ie(wiphy
, country_ie_request
);
1596 switch (treatment
) {
1599 case REG_REQ_IGNORE
:
1601 case REG_REQ_ALREADY_SET
:
1602 kfree(country_ie_request
);
1604 case REG_REQ_INTERSECT
:
1605 kfree(country_ie_request
);
1607 * This doesn't happen yet, not sure we
1608 * ever want to support it for this case.
1610 WARN_ONCE(1, "Unexpected intersection for country IEs");
1611 return REG_REQ_IGNORE
;
1614 country_ie_request
->intersect
= false;
1615 country_ie_request
->processed
= false;
1617 reg_update_last_request(country_ie_request
);
1619 return reg_call_crda(country_ie_request
);
1622 /* This processes *all* regulatory hints */
1623 static void reg_process_hint(struct regulatory_request
*reg_request
)
1625 struct wiphy
*wiphy
= NULL
;
1626 enum reg_request_treatment treatment
;
1628 if (WARN_ON(!reg_request
->alpha2
))
1631 if (reg_request
->wiphy_idx
!= WIPHY_IDX_INVALID
)
1632 wiphy
= wiphy_idx_to_wiphy(reg_request
->wiphy_idx
);
1634 if (reg_request
->initiator
== NL80211_REGDOM_SET_BY_DRIVER
&& !wiphy
) {
1639 switch (reg_request
->initiator
) {
1640 case NL80211_REGDOM_SET_BY_CORE
:
1641 reg_process_hint_core(reg_request
);
1643 case NL80211_REGDOM_SET_BY_USER
:
1644 treatment
= reg_process_hint_user(reg_request
);
1645 if (treatment
== REG_REQ_OK
||
1646 treatment
== REG_REQ_ALREADY_SET
)
1648 schedule_delayed_work(®_timeout
, msecs_to_jiffies(3142));
1650 case NL80211_REGDOM_SET_BY_DRIVER
:
1651 treatment
= reg_process_hint_driver(wiphy
, reg_request
);
1653 case NL80211_REGDOM_SET_BY_COUNTRY_IE
:
1654 treatment
= reg_process_hint_country_ie(wiphy
, reg_request
);
1657 WARN(1, "invalid initiator %d\n", reg_request
->initiator
);
1661 /* This is required so that the orig_* parameters are saved */
1662 if (treatment
== REG_REQ_ALREADY_SET
&& wiphy
&&
1663 wiphy
->regulatory_flags
& REGULATORY_STRICT_REG
)
1664 wiphy_update_regulatory(wiphy
, reg_request
->initiator
);
1668 * Processes regulatory hints, this is all the NL80211_REGDOM_SET_BY_*
1669 * Regulatory hints come on a first come first serve basis and we
1670 * must process each one atomically.
1672 static void reg_process_pending_hints(void)
1674 struct regulatory_request
*reg_request
, *lr
;
1676 lr
= get_last_request();
1678 /* When last_request->processed becomes true this will be rescheduled */
1679 if (lr
&& !lr
->processed
) {
1680 REG_DBG_PRINT("Pending regulatory request, waiting for it to be processed...\n");
1684 spin_lock(®_requests_lock
);
1686 if (list_empty(®_requests_list
)) {
1687 spin_unlock(®_requests_lock
);
1691 reg_request
= list_first_entry(®_requests_list
,
1692 struct regulatory_request
,
1694 list_del_init(®_request
->list
);
1696 spin_unlock(®_requests_lock
);
1698 reg_process_hint(reg_request
);
1701 /* Processes beacon hints -- this has nothing to do with country IEs */
1702 static void reg_process_pending_beacon_hints(void)
1704 struct cfg80211_registered_device
*rdev
;
1705 struct reg_beacon
*pending_beacon
, *tmp
;
1707 /* This goes through the _pending_ beacon list */
1708 spin_lock_bh(®_pending_beacons_lock
);
1710 list_for_each_entry_safe(pending_beacon
, tmp
,
1711 ®_pending_beacons
, list
) {
1712 list_del_init(&pending_beacon
->list
);
1714 /* Applies the beacon hint to current wiphys */
1715 list_for_each_entry(rdev
, &cfg80211_rdev_list
, list
)
1716 wiphy_update_new_beacon(&rdev
->wiphy
, pending_beacon
);
1718 /* Remembers the beacon hint for new wiphys or reg changes */
1719 list_add_tail(&pending_beacon
->list
, ®_beacon_list
);
1722 spin_unlock_bh(®_pending_beacons_lock
);
1725 static void reg_todo(struct work_struct
*work
)
1728 reg_process_pending_hints();
1729 reg_process_pending_beacon_hints();
1733 static void queue_regulatory_request(struct regulatory_request
*request
)
1735 request
->alpha2
[0] = toupper(request
->alpha2
[0]);
1736 request
->alpha2
[1] = toupper(request
->alpha2
[1]);
1738 spin_lock(®_requests_lock
);
1739 list_add_tail(&request
->list
, ®_requests_list
);
1740 spin_unlock(®_requests_lock
);
1742 schedule_work(®_work
);
1746 * Core regulatory hint -- happens during cfg80211_init()
1747 * and when we restore regulatory settings.
1749 static int regulatory_hint_core(const char *alpha2
)
1751 struct regulatory_request
*request
;
1753 request
= kzalloc(sizeof(struct regulatory_request
), GFP_KERNEL
);
1757 request
->alpha2
[0] = alpha2
[0];
1758 request
->alpha2
[1] = alpha2
[1];
1759 request
->initiator
= NL80211_REGDOM_SET_BY_CORE
;
1761 queue_regulatory_request(request
);
1767 int regulatory_hint_user(const char *alpha2
,
1768 enum nl80211_user_reg_hint_type user_reg_hint_type
)
1770 struct regulatory_request
*request
;
1772 if (WARN_ON(!alpha2
))
1775 request
= kzalloc(sizeof(struct regulatory_request
), GFP_KERNEL
);
1779 request
->wiphy_idx
= WIPHY_IDX_INVALID
;
1780 request
->alpha2
[0] = alpha2
[0];
1781 request
->alpha2
[1] = alpha2
[1];
1782 request
->initiator
= NL80211_REGDOM_SET_BY_USER
;
1783 request
->user_reg_hint_type
= user_reg_hint_type
;
1785 queue_regulatory_request(request
);
1791 int regulatory_hint(struct wiphy
*wiphy
, const char *alpha2
)
1793 struct regulatory_request
*request
;
1795 if (WARN_ON(!alpha2
|| !wiphy
))
1798 request
= kzalloc(sizeof(struct regulatory_request
), GFP_KERNEL
);
1802 request
->wiphy_idx
= get_wiphy_idx(wiphy
);
1804 request
->alpha2
[0] = alpha2
[0];
1805 request
->alpha2
[1] = alpha2
[1];
1806 request
->initiator
= NL80211_REGDOM_SET_BY_DRIVER
;
1808 queue_regulatory_request(request
);
1812 EXPORT_SYMBOL(regulatory_hint
);
1814 void regulatory_hint_country_ie(struct wiphy
*wiphy
, enum ieee80211_band band
,
1815 const u8
*country_ie
, u8 country_ie_len
)
1818 enum environment_cap env
= ENVIRON_ANY
;
1819 struct regulatory_request
*request
= NULL
, *lr
;
1821 /* IE len must be evenly divisible by 2 */
1822 if (country_ie_len
& 0x01)
1825 if (country_ie_len
< IEEE80211_COUNTRY_IE_MIN_LEN
)
1828 request
= kzalloc(sizeof(*request
), GFP_KERNEL
);
1832 alpha2
[0] = country_ie
[0];
1833 alpha2
[1] = country_ie
[1];
1835 if (country_ie
[2] == 'I')
1836 env
= ENVIRON_INDOOR
;
1837 else if (country_ie
[2] == 'O')
1838 env
= ENVIRON_OUTDOOR
;
1841 lr
= get_last_request();
1847 * We will run this only upon a successful connection on cfg80211.
1848 * We leave conflict resolution to the workqueue, where can hold
1851 if (lr
->initiator
== NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
1852 lr
->wiphy_idx
!= WIPHY_IDX_INVALID
)
1855 request
->wiphy_idx
= get_wiphy_idx(wiphy
);
1856 request
->alpha2
[0] = alpha2
[0];
1857 request
->alpha2
[1] = alpha2
[1];
1858 request
->initiator
= NL80211_REGDOM_SET_BY_COUNTRY_IE
;
1859 request
->country_ie_env
= env
;
1861 queue_regulatory_request(request
);
1868 static void restore_alpha2(char *alpha2
, bool reset_user
)
1870 /* indicates there is no alpha2 to consider for restoration */
1874 /* The user setting has precedence over the module parameter */
1875 if (is_user_regdom_saved()) {
1876 /* Unless we're asked to ignore it and reset it */
1878 REG_DBG_PRINT("Restoring regulatory settings including user preference\n");
1879 user_alpha2
[0] = '9';
1880 user_alpha2
[1] = '7';
1883 * If we're ignoring user settings, we still need to
1884 * check the module parameter to ensure we put things
1885 * back as they were for a full restore.
1887 if (!is_world_regdom(ieee80211_regdom
)) {
1888 REG_DBG_PRINT("Keeping preference on module parameter ieee80211_regdom: %c%c\n",
1889 ieee80211_regdom
[0], ieee80211_regdom
[1]);
1890 alpha2
[0] = ieee80211_regdom
[0];
1891 alpha2
[1] = ieee80211_regdom
[1];
1894 REG_DBG_PRINT("Restoring regulatory settings while preserving user preference for: %c%c\n",
1895 user_alpha2
[0], user_alpha2
[1]);
1896 alpha2
[0] = user_alpha2
[0];
1897 alpha2
[1] = user_alpha2
[1];
1899 } else if (!is_world_regdom(ieee80211_regdom
)) {
1900 REG_DBG_PRINT("Keeping preference on module parameter ieee80211_regdom: %c%c\n",
1901 ieee80211_regdom
[0], ieee80211_regdom
[1]);
1902 alpha2
[0] = ieee80211_regdom
[0];
1903 alpha2
[1] = ieee80211_regdom
[1];
1905 REG_DBG_PRINT("Restoring regulatory settings\n");
1908 static void restore_custom_reg_settings(struct wiphy
*wiphy
)
1910 struct ieee80211_supported_band
*sband
;
1911 enum ieee80211_band band
;
1912 struct ieee80211_channel
*chan
;
1915 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++) {
1916 sband
= wiphy
->bands
[band
];
1919 for (i
= 0; i
< sband
->n_channels
; i
++) {
1920 chan
= &sband
->channels
[i
];
1921 chan
->flags
= chan
->orig_flags
;
1922 chan
->max_antenna_gain
= chan
->orig_mag
;
1923 chan
->max_power
= chan
->orig_mpwr
;
1924 chan
->beacon_found
= false;
1930 * Restoring regulatory settings involves ingoring any
1931 * possibly stale country IE information and user regulatory
1932 * settings if so desired, this includes any beacon hints
1933 * learned as we could have traveled outside to another country
1934 * after disconnection. To restore regulatory settings we do
1935 * exactly what we did at bootup:
1937 * - send a core regulatory hint
1938 * - send a user regulatory hint if applicable
1940 * Device drivers that send a regulatory hint for a specific country
1941 * keep their own regulatory domain on wiphy->regd so that does does
1942 * not need to be remembered.
1944 static void restore_regulatory_settings(bool reset_user
)
1947 char world_alpha2
[2];
1948 struct reg_beacon
*reg_beacon
, *btmp
;
1949 struct regulatory_request
*reg_request
, *tmp
;
1950 LIST_HEAD(tmp_reg_req_list
);
1951 struct cfg80211_registered_device
*rdev
;
1955 reset_regdomains(true, &world_regdom
);
1956 restore_alpha2(alpha2
, reset_user
);
1959 * If there's any pending requests we simply
1960 * stash them to a temporary pending queue and
1961 * add then after we've restored regulatory
1964 spin_lock(®_requests_lock
);
1965 list_for_each_entry_safe(reg_request
, tmp
, ®_requests_list
, list
) {
1966 if (reg_request
->initiator
!= NL80211_REGDOM_SET_BY_USER
)
1968 list_move_tail(®_request
->list
, &tmp_reg_req_list
);
1970 spin_unlock(®_requests_lock
);
1972 /* Clear beacon hints */
1973 spin_lock_bh(®_pending_beacons_lock
);
1974 list_for_each_entry_safe(reg_beacon
, btmp
, ®_pending_beacons
, list
) {
1975 list_del(®_beacon
->list
);
1978 spin_unlock_bh(®_pending_beacons_lock
);
1980 list_for_each_entry_safe(reg_beacon
, btmp
, ®_beacon_list
, list
) {
1981 list_del(®_beacon
->list
);
1985 /* First restore to the basic regulatory settings */
1986 world_alpha2
[0] = cfg80211_world_regdom
->alpha2
[0];
1987 world_alpha2
[1] = cfg80211_world_regdom
->alpha2
[1];
1989 list_for_each_entry(rdev
, &cfg80211_rdev_list
, list
) {
1990 if (rdev
->wiphy
.regulatory_flags
& REGULATORY_CUSTOM_REG
)
1991 restore_custom_reg_settings(&rdev
->wiphy
);
1994 regulatory_hint_core(world_alpha2
);
1997 * This restores the ieee80211_regdom module parameter
1998 * preference or the last user requested regulatory
1999 * settings, user regulatory settings takes precedence.
2001 if (is_an_alpha2(alpha2
))
2002 regulatory_hint_user(user_alpha2
, NL80211_USER_REG_HINT_USER
);
2004 spin_lock(®_requests_lock
);
2005 list_splice_tail_init(&tmp_reg_req_list
, ®_requests_list
);
2006 spin_unlock(®_requests_lock
);
2008 REG_DBG_PRINT("Kicking the queue\n");
2010 schedule_work(®_work
);
2013 void regulatory_hint_disconnect(void)
2015 REG_DBG_PRINT("All devices are disconnected, going to restore regulatory settings\n");
2016 restore_regulatory_settings(false);
2019 static bool freq_is_chan_12_13_14(u16 freq
)
2021 if (freq
== ieee80211_channel_to_frequency(12, IEEE80211_BAND_2GHZ
) ||
2022 freq
== ieee80211_channel_to_frequency(13, IEEE80211_BAND_2GHZ
) ||
2023 freq
== ieee80211_channel_to_frequency(14, IEEE80211_BAND_2GHZ
))
2028 static bool pending_reg_beacon(struct ieee80211_channel
*beacon_chan
)
2030 struct reg_beacon
*pending_beacon
;
2032 list_for_each_entry(pending_beacon
, ®_pending_beacons
, list
)
2033 if (beacon_chan
->center_freq
==
2034 pending_beacon
->chan
.center_freq
)
2039 int regulatory_hint_found_beacon(struct wiphy
*wiphy
,
2040 struct ieee80211_channel
*beacon_chan
,
2043 struct reg_beacon
*reg_beacon
;
2046 if (beacon_chan
->beacon_found
||
2047 beacon_chan
->flags
& IEEE80211_CHAN_RADAR
||
2048 (beacon_chan
->band
== IEEE80211_BAND_2GHZ
&&
2049 !freq_is_chan_12_13_14(beacon_chan
->center_freq
)))
2052 spin_lock_bh(®_pending_beacons_lock
);
2053 processing
= pending_reg_beacon(beacon_chan
);
2054 spin_unlock_bh(®_pending_beacons_lock
);
2059 reg_beacon
= kzalloc(sizeof(struct reg_beacon
), gfp
);
2063 REG_DBG_PRINT("Found new beacon on frequency: %d MHz (Ch %d) on %s\n",
2064 beacon_chan
->center_freq
,
2065 ieee80211_frequency_to_channel(beacon_chan
->center_freq
),
2068 memcpy(®_beacon
->chan
, beacon_chan
,
2069 sizeof(struct ieee80211_channel
));
2072 * Since we can be called from BH or and non-BH context
2073 * we must use spin_lock_bh()
2075 spin_lock_bh(®_pending_beacons_lock
);
2076 list_add_tail(®_beacon
->list
, ®_pending_beacons
);
2077 spin_unlock_bh(®_pending_beacons_lock
);
2079 schedule_work(®_work
);
2084 static void print_rd_rules(const struct ieee80211_regdomain
*rd
)
2087 const struct ieee80211_reg_rule
*reg_rule
= NULL
;
2088 const struct ieee80211_freq_range
*freq_range
= NULL
;
2089 const struct ieee80211_power_rule
*power_rule
= NULL
;
2091 pr_info(" (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)\n");
2093 for (i
= 0; i
< rd
->n_reg_rules
; i
++) {
2094 reg_rule
= &rd
->reg_rules
[i
];
2095 freq_range
= ®_rule
->freq_range
;
2096 power_rule
= ®_rule
->power_rule
;
2099 * There may not be documentation for max antenna gain
2100 * in certain regions
2102 if (power_rule
->max_antenna_gain
)
2103 pr_info(" (%d KHz - %d KHz @ %d KHz), (%d mBi, %d mBm)\n",
2104 freq_range
->start_freq_khz
,
2105 freq_range
->end_freq_khz
,
2106 freq_range
->max_bandwidth_khz
,
2107 power_rule
->max_antenna_gain
,
2108 power_rule
->max_eirp
);
2110 pr_info(" (%d KHz - %d KHz @ %d KHz), (N/A, %d mBm)\n",
2111 freq_range
->start_freq_khz
,
2112 freq_range
->end_freq_khz
,
2113 freq_range
->max_bandwidth_khz
,
2114 power_rule
->max_eirp
);
2118 bool reg_supported_dfs_region(u8 dfs_region
)
2120 switch (dfs_region
) {
2121 case NL80211_DFS_UNSET
:
2122 case NL80211_DFS_FCC
:
2123 case NL80211_DFS_ETSI
:
2124 case NL80211_DFS_JP
:
2127 REG_DBG_PRINT("Ignoring uknown DFS master region: %d\n",
2133 static void print_dfs_region(u8 dfs_region
)
2138 switch (dfs_region
) {
2139 case NL80211_DFS_FCC
:
2140 pr_info(" DFS Master region FCC");
2142 case NL80211_DFS_ETSI
:
2143 pr_info(" DFS Master region ETSI");
2145 case NL80211_DFS_JP
:
2146 pr_info(" DFS Master region JP");
2149 pr_info(" DFS Master region Unknown");
2154 static void print_regdomain(const struct ieee80211_regdomain
*rd
)
2156 struct regulatory_request
*lr
= get_last_request();
2158 if (is_intersected_alpha2(rd
->alpha2
)) {
2159 if (lr
->initiator
== NL80211_REGDOM_SET_BY_COUNTRY_IE
) {
2160 struct cfg80211_registered_device
*rdev
;
2161 rdev
= cfg80211_rdev_by_wiphy_idx(lr
->wiphy_idx
);
2163 pr_info("Current regulatory domain updated by AP to: %c%c\n",
2164 rdev
->country_ie_alpha2
[0],
2165 rdev
->country_ie_alpha2
[1]);
2167 pr_info("Current regulatory domain intersected:\n");
2169 pr_info("Current regulatory domain intersected:\n");
2170 } else if (is_world_regdom(rd
->alpha2
)) {
2171 pr_info("World regulatory domain updated:\n");
2173 if (is_unknown_alpha2(rd
->alpha2
))
2174 pr_info("Regulatory domain changed to driver built-in settings (unknown country)\n");
2176 if (reg_request_cell_base(lr
))
2177 pr_info("Regulatory domain changed to country: %c%c by Cell Station\n",
2178 rd
->alpha2
[0], rd
->alpha2
[1]);
2180 pr_info("Regulatory domain changed to country: %c%c\n",
2181 rd
->alpha2
[0], rd
->alpha2
[1]);
2185 print_dfs_region(rd
->dfs_region
);
2189 static void print_regdomain_info(const struct ieee80211_regdomain
*rd
)
2191 pr_info("Regulatory domain: %c%c\n", rd
->alpha2
[0], rd
->alpha2
[1]);
2195 static int reg_set_rd_core(const struct ieee80211_regdomain
*rd
)
2197 if (!is_world_regdom(rd
->alpha2
))
2199 update_world_regdomain(rd
);
2203 static int reg_set_rd_user(const struct ieee80211_regdomain
*rd
,
2204 struct regulatory_request
*user_request
)
2206 const struct ieee80211_regdomain
*intersected_rd
= NULL
;
2208 if (is_world_regdom(rd
->alpha2
))
2211 if (!regdom_changes(rd
->alpha2
))
2214 if (!is_valid_rd(rd
)) {
2215 pr_err("Invalid regulatory domain detected:\n");
2216 print_regdomain_info(rd
);
2220 if (!user_request
->intersect
) {
2221 reset_regdomains(false, rd
);
2225 intersected_rd
= regdom_intersect(rd
, get_cfg80211_regdom());
2226 if (!intersected_rd
)
2231 reset_regdomains(false, intersected_rd
);
2236 static int reg_set_rd_driver(const struct ieee80211_regdomain
*rd
,
2237 struct regulatory_request
*driver_request
)
2239 const struct ieee80211_regdomain
*regd
;
2240 const struct ieee80211_regdomain
*intersected_rd
= NULL
;
2241 const struct ieee80211_regdomain
*tmp
;
2242 struct wiphy
*request_wiphy
;
2244 if (is_world_regdom(rd
->alpha2
))
2247 if (!regdom_changes(rd
->alpha2
))
2250 if (!is_valid_rd(rd
)) {
2251 pr_err("Invalid regulatory domain detected:\n");
2252 print_regdomain_info(rd
);
2256 request_wiphy
= wiphy_idx_to_wiphy(driver_request
->wiphy_idx
);
2257 if (!request_wiphy
) {
2258 schedule_delayed_work(®_timeout
, 0);
2262 if (!driver_request
->intersect
) {
2263 if (request_wiphy
->regd
)
2266 regd
= reg_copy_regd(rd
);
2268 return PTR_ERR(regd
);
2270 rcu_assign_pointer(request_wiphy
->regd
, regd
);
2271 reset_regdomains(false, rd
);
2275 intersected_rd
= regdom_intersect(rd
, get_cfg80211_regdom());
2276 if (!intersected_rd
)
2280 * We can trash what CRDA provided now.
2281 * However if a driver requested this specific regulatory
2282 * domain we keep it for its private use
2284 tmp
= get_wiphy_regdom(request_wiphy
);
2285 rcu_assign_pointer(request_wiphy
->regd
, rd
);
2286 rcu_free_regdom(tmp
);
2290 reset_regdomains(false, intersected_rd
);
2295 static int reg_set_rd_country_ie(const struct ieee80211_regdomain
*rd
,
2296 struct regulatory_request
*country_ie_request
)
2298 struct wiphy
*request_wiphy
;
2300 if (!is_alpha2_set(rd
->alpha2
) && !is_an_alpha2(rd
->alpha2
) &&
2301 !is_unknown_alpha2(rd
->alpha2
))
2305 * Lets only bother proceeding on the same alpha2 if the current
2306 * rd is non static (it means CRDA was present and was used last)
2307 * and the pending request came in from a country IE
2310 if (!is_valid_rd(rd
)) {
2311 pr_err("Invalid regulatory domain detected:\n");
2312 print_regdomain_info(rd
);
2316 request_wiphy
= wiphy_idx_to_wiphy(country_ie_request
->wiphy_idx
);
2317 if (!request_wiphy
) {
2318 schedule_delayed_work(®_timeout
, 0);
2322 if (country_ie_request
->intersect
)
2325 reset_regdomains(false, rd
);
2330 * Use this call to set the current regulatory domain. Conflicts with
2331 * multiple drivers can be ironed out later. Caller must've already
2332 * kmalloc'd the rd structure.
2334 int set_regdom(const struct ieee80211_regdomain
*rd
)
2336 struct regulatory_request
*lr
;
2339 if (!reg_is_valid_request(rd
->alpha2
)) {
2344 lr
= get_last_request();
2346 /* Note that this doesn't update the wiphys, this is done below */
2347 switch (lr
->initiator
) {
2348 case NL80211_REGDOM_SET_BY_CORE
:
2349 r
= reg_set_rd_core(rd
);
2351 case NL80211_REGDOM_SET_BY_USER
:
2352 r
= reg_set_rd_user(rd
, lr
);
2354 case NL80211_REGDOM_SET_BY_DRIVER
:
2355 r
= reg_set_rd_driver(rd
, lr
);
2357 case NL80211_REGDOM_SET_BY_COUNTRY_IE
:
2358 r
= reg_set_rd_country_ie(rd
, lr
);
2361 WARN(1, "invalid initiator %d\n", lr
->initiator
);
2367 reg_set_request_processed();
2373 /* This would make this whole thing pointless */
2374 if (WARN_ON(!lr
->intersect
&& rd
!= get_cfg80211_regdom()))
2377 /* update all wiphys now with the new established regulatory domain */
2378 update_all_wiphy_regulatory(lr
->initiator
);
2380 print_regdomain(get_cfg80211_regdom());
2382 nl80211_send_reg_change_event(lr
);
2384 reg_set_request_processed();
2389 int reg_device_uevent(struct device
*dev
, struct kobj_uevent_env
*env
)
2391 struct regulatory_request
*lr
;
2396 lr
= get_last_request();
2397 if (lr
&& !lr
->processed
) {
2398 memcpy(alpha2
, lr
->alpha2
, 2);
2404 return add_uevent_var(env
, "COUNTRY=%c%c",
2405 alpha2
[0], alpha2
[1]);
2409 void wiphy_regulatory_register(struct wiphy
*wiphy
)
2411 struct regulatory_request
*lr
;
2413 if (!reg_dev_ignore_cell_hint(wiphy
))
2414 reg_num_devs_support_basehint
++;
2416 lr
= get_last_request();
2417 wiphy_update_regulatory(wiphy
, lr
->initiator
);
2420 void wiphy_regulatory_deregister(struct wiphy
*wiphy
)
2422 struct wiphy
*request_wiphy
= NULL
;
2423 struct regulatory_request
*lr
;
2425 lr
= get_last_request();
2427 if (!reg_dev_ignore_cell_hint(wiphy
))
2428 reg_num_devs_support_basehint
--;
2430 rcu_free_regdom(get_wiphy_regdom(wiphy
));
2431 rcu_assign_pointer(wiphy
->regd
, NULL
);
2434 request_wiphy
= wiphy_idx_to_wiphy(lr
->wiphy_idx
);
2436 if (!request_wiphy
|| request_wiphy
!= wiphy
)
2439 lr
->wiphy_idx
= WIPHY_IDX_INVALID
;
2440 lr
->country_ie_env
= ENVIRON_ANY
;
2443 static void reg_timeout_work(struct work_struct
*work
)
2445 REG_DBG_PRINT("Timeout while waiting for CRDA to reply, restoring regulatory settings\n");
2447 restore_regulatory_settings(true);
2451 int __init
regulatory_init(void)
2455 reg_pdev
= platform_device_register_simple("regulatory", 0, NULL
, 0);
2456 if (IS_ERR(reg_pdev
))
2457 return PTR_ERR(reg_pdev
);
2459 reg_pdev
->dev
.type
= ®_device_type
;
2461 spin_lock_init(®_requests_lock
);
2462 spin_lock_init(®_pending_beacons_lock
);
2464 reg_regdb_size_check();
2466 rcu_assign_pointer(cfg80211_regdomain
, cfg80211_world_regdom
);
2468 user_alpha2
[0] = '9';
2469 user_alpha2
[1] = '7';
2471 /* We always try to get an update for the static regdomain */
2472 err
= regulatory_hint_core(cfg80211_world_regdom
->alpha2
);
2477 * N.B. kobject_uevent_env() can fail mainly for when we're out
2478 * memory which is handled and propagated appropriately above
2479 * but it can also fail during a netlink_broadcast() or during
2480 * early boot for call_usermodehelper(). For now treat these
2481 * errors as non-fatal.
2483 pr_err("kobject_uevent_env() was unable to call CRDA during init\n");
2487 * Finally, if the user set the module parameter treat it
2490 if (!is_world_regdom(ieee80211_regdom
))
2491 regulatory_hint_user(ieee80211_regdom
,
2492 NL80211_USER_REG_HINT_USER
);
2497 void regulatory_exit(void)
2499 struct regulatory_request
*reg_request
, *tmp
;
2500 struct reg_beacon
*reg_beacon
, *btmp
;
2502 cancel_work_sync(®_work
);
2503 cancel_delayed_work_sync(®_timeout
);
2505 /* Lock to suppress warnings */
2507 reset_regdomains(true, NULL
);
2510 dev_set_uevent_suppress(®_pdev
->dev
, true);
2512 platform_device_unregister(reg_pdev
);
2514 list_for_each_entry_safe(reg_beacon
, btmp
, ®_pending_beacons
, list
) {
2515 list_del(®_beacon
->list
);
2519 list_for_each_entry_safe(reg_beacon
, btmp
, ®_beacon_list
, list
) {
2520 list_del(®_beacon
->list
);
2524 list_for_each_entry_safe(reg_request
, tmp
, ®_requests_list
, list
) {
2525 list_del(®_request
->list
);