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
->flags
& WIPHY_FLAG_STRICT_REGULATORY
) {
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
->flags
& WIPHY_FLAG_STRICT_REGULATORY
) {
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 have their own custom regulatory domain
925 * but also use WIPHY_FLAG_STRICT_REGULATORY will follow the
926 * passed country IE power settings.
928 if (initiator
== NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
929 wiphy
->flags
& WIPHY_FLAG_CUSTOM_REGULATORY
&&
930 wiphy
->flags
& WIPHY_FLAG_STRICT_REGULATORY
)
931 chan
->max_power
= chan
->max_reg_power
;
933 chan
->max_power
= min(chan
->orig_mpwr
,
934 chan
->max_reg_power
);
936 chan
->max_power
= chan
->max_reg_power
;
939 static void handle_band(struct wiphy
*wiphy
,
940 enum nl80211_reg_initiator initiator
,
941 struct ieee80211_supported_band
*sband
)
948 for (i
= 0; i
< sband
->n_channels
; i
++)
949 handle_channel(wiphy
, initiator
, &sband
->channels
[i
]);
952 static bool reg_request_cell_base(struct regulatory_request
*request
)
954 if (request
->initiator
!= NL80211_REGDOM_SET_BY_USER
)
956 return request
->user_reg_hint_type
== NL80211_USER_REG_HINT_CELL_BASE
;
959 bool reg_last_request_cell_base(void)
961 return reg_request_cell_base(get_last_request());
964 #ifdef CONFIG_CFG80211_CERTIFICATION_ONUS
965 /* Core specific check */
966 static enum reg_request_treatment
967 reg_ignore_cell_hint(struct regulatory_request
*pending_request
)
969 struct regulatory_request
*lr
= get_last_request();
971 if (!reg_num_devs_support_basehint
)
972 return REG_REQ_IGNORE
;
974 if (reg_request_cell_base(lr
) &&
975 !regdom_changes(pending_request
->alpha2
))
976 return REG_REQ_ALREADY_SET
;
981 /* Device specific check */
982 static bool reg_dev_ignore_cell_hint(struct wiphy
*wiphy
)
984 return !(wiphy
->features
& NL80211_FEATURE_CELL_BASE_REG_HINTS
);
987 static int reg_ignore_cell_hint(struct regulatory_request
*pending_request
)
989 return REG_REQ_IGNORE
;
992 static bool reg_dev_ignore_cell_hint(struct wiphy
*wiphy
)
998 static bool wiphy_strict_alpha2_regd(struct wiphy
*wiphy
)
1000 if (wiphy
->flags
& WIPHY_FLAG_STRICT_REGULATORY
&&
1001 !(wiphy
->flags
& WIPHY_FLAG_CUSTOM_REGULATORY
))
1006 static bool ignore_reg_update(struct wiphy
*wiphy
,
1007 enum nl80211_reg_initiator initiator
)
1009 struct regulatory_request
*lr
= get_last_request();
1012 REG_DBG_PRINT("Ignoring regulatory request set by %s "
1013 "since last_request is not set\n",
1014 reg_initiator_name(initiator
));
1018 if (initiator
== NL80211_REGDOM_SET_BY_CORE
&&
1019 wiphy
->flags
& WIPHY_FLAG_CUSTOM_REGULATORY
) {
1020 REG_DBG_PRINT("Ignoring regulatory request set by %s "
1021 "since the driver uses its own custom "
1022 "regulatory domain\n",
1023 reg_initiator_name(initiator
));
1028 * wiphy->regd will be set once the device has its own
1029 * desired regulatory domain set
1031 if (wiphy_strict_alpha2_regd(wiphy
) && !wiphy
->regd
&&
1032 initiator
!= NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
1033 !is_world_regdom(lr
->alpha2
)) {
1034 REG_DBG_PRINT("Ignoring regulatory request set by %s "
1035 "since the driver requires its own regulatory "
1036 "domain to be set first\n",
1037 reg_initiator_name(initiator
));
1041 if (reg_request_cell_base(lr
))
1042 return reg_dev_ignore_cell_hint(wiphy
);
1047 static bool reg_is_world_roaming(struct wiphy
*wiphy
)
1049 const struct ieee80211_regdomain
*cr
= get_cfg80211_regdom();
1050 const struct ieee80211_regdomain
*wr
= get_wiphy_regdom(wiphy
);
1051 struct regulatory_request
*lr
= get_last_request();
1053 if (is_world_regdom(cr
->alpha2
) || (wr
&& is_world_regdom(wr
->alpha2
)))
1056 if (lr
&& lr
->initiator
!= NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
1057 wiphy
->flags
& WIPHY_FLAG_CUSTOM_REGULATORY
)
1063 static void handle_reg_beacon(struct wiphy
*wiphy
, unsigned int chan_idx
,
1064 struct reg_beacon
*reg_beacon
)
1066 struct ieee80211_supported_band
*sband
;
1067 struct ieee80211_channel
*chan
;
1068 bool channel_changed
= false;
1069 struct ieee80211_channel chan_before
;
1071 sband
= wiphy
->bands
[reg_beacon
->chan
.band
];
1072 chan
= &sband
->channels
[chan_idx
];
1074 if (likely(chan
->center_freq
!= reg_beacon
->chan
.center_freq
))
1077 if (chan
->beacon_found
)
1080 chan
->beacon_found
= true;
1082 if (!reg_is_world_roaming(wiphy
))
1085 if (wiphy
->flags
& WIPHY_FLAG_DISABLE_BEACON_HINTS
)
1088 chan_before
.center_freq
= chan
->center_freq
;
1089 chan_before
.flags
= chan
->flags
;
1091 if (chan
->flags
& IEEE80211_CHAN_NO_IR
) {
1092 chan
->flags
&= ~IEEE80211_CHAN_NO_IR
;
1093 channel_changed
= true;
1096 if (channel_changed
)
1097 nl80211_send_beacon_hint_event(wiphy
, &chan_before
, chan
);
1101 * Called when a scan on a wiphy finds a beacon on
1104 static void wiphy_update_new_beacon(struct wiphy
*wiphy
,
1105 struct reg_beacon
*reg_beacon
)
1108 struct ieee80211_supported_band
*sband
;
1110 if (!wiphy
->bands
[reg_beacon
->chan
.band
])
1113 sband
= wiphy
->bands
[reg_beacon
->chan
.band
];
1115 for (i
= 0; i
< sband
->n_channels
; i
++)
1116 handle_reg_beacon(wiphy
, i
, reg_beacon
);
1120 * Called upon reg changes or a new wiphy is added
1122 static void wiphy_update_beacon_reg(struct wiphy
*wiphy
)
1125 struct ieee80211_supported_band
*sband
;
1126 struct reg_beacon
*reg_beacon
;
1128 list_for_each_entry(reg_beacon
, ®_beacon_list
, list
) {
1129 if (!wiphy
->bands
[reg_beacon
->chan
.band
])
1131 sband
= wiphy
->bands
[reg_beacon
->chan
.band
];
1132 for (i
= 0; i
< sband
->n_channels
; i
++)
1133 handle_reg_beacon(wiphy
, i
, reg_beacon
);
1137 /* Reap the advantages of previously found beacons */
1138 static void reg_process_beacons(struct wiphy
*wiphy
)
1141 * Means we are just firing up cfg80211, so no beacons would
1142 * have been processed yet.
1146 wiphy_update_beacon_reg(wiphy
);
1149 static bool is_ht40_allowed(struct ieee80211_channel
*chan
)
1153 if (chan
->flags
& IEEE80211_CHAN_DISABLED
)
1155 /* This would happen when regulatory rules disallow HT40 completely */
1156 if ((chan
->flags
& IEEE80211_CHAN_NO_HT40
) == IEEE80211_CHAN_NO_HT40
)
1161 static void reg_process_ht_flags_channel(struct wiphy
*wiphy
,
1162 struct ieee80211_channel
*channel
)
1164 struct ieee80211_supported_band
*sband
= wiphy
->bands
[channel
->band
];
1165 struct ieee80211_channel
*channel_before
= NULL
, *channel_after
= NULL
;
1168 if (!is_ht40_allowed(channel
)) {
1169 channel
->flags
|= IEEE80211_CHAN_NO_HT40
;
1174 * We need to ensure the extension channels exist to
1175 * be able to use HT40- or HT40+, this finds them (or not)
1177 for (i
= 0; i
< sband
->n_channels
; i
++) {
1178 struct ieee80211_channel
*c
= &sband
->channels
[i
];
1180 if (c
->center_freq
== (channel
->center_freq
- 20))
1182 if (c
->center_freq
== (channel
->center_freq
+ 20))
1187 * Please note that this assumes target bandwidth is 20 MHz,
1188 * if that ever changes we also need to change the below logic
1189 * to include that as well.
1191 if (!is_ht40_allowed(channel_before
))
1192 channel
->flags
|= IEEE80211_CHAN_NO_HT40MINUS
;
1194 channel
->flags
&= ~IEEE80211_CHAN_NO_HT40MINUS
;
1196 if (!is_ht40_allowed(channel_after
))
1197 channel
->flags
|= IEEE80211_CHAN_NO_HT40PLUS
;
1199 channel
->flags
&= ~IEEE80211_CHAN_NO_HT40PLUS
;
1202 static void reg_process_ht_flags_band(struct wiphy
*wiphy
,
1203 struct ieee80211_supported_band
*sband
)
1210 for (i
= 0; i
< sband
->n_channels
; i
++)
1211 reg_process_ht_flags_channel(wiphy
, &sband
->channels
[i
]);
1214 static void reg_process_ht_flags(struct wiphy
*wiphy
)
1216 enum ieee80211_band band
;
1221 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++)
1222 reg_process_ht_flags_band(wiphy
, wiphy
->bands
[band
]);
1225 static void wiphy_update_regulatory(struct wiphy
*wiphy
,
1226 enum nl80211_reg_initiator initiator
)
1228 enum ieee80211_band band
;
1229 struct regulatory_request
*lr
= get_last_request();
1231 if (ignore_reg_update(wiphy
, initiator
))
1234 lr
->dfs_region
= get_cfg80211_regdom()->dfs_region
;
1236 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++)
1237 handle_band(wiphy
, initiator
, wiphy
->bands
[band
]);
1239 reg_process_beacons(wiphy
);
1240 reg_process_ht_flags(wiphy
);
1242 if (wiphy
->reg_notifier
)
1243 wiphy
->reg_notifier(wiphy
, lr
);
1246 static void update_all_wiphy_regulatory(enum nl80211_reg_initiator initiator
)
1248 struct cfg80211_registered_device
*rdev
;
1249 struct wiphy
*wiphy
;
1253 list_for_each_entry(rdev
, &cfg80211_rdev_list
, list
) {
1254 wiphy
= &rdev
->wiphy
;
1255 wiphy_update_regulatory(wiphy
, initiator
);
1257 * Regulatory updates set by CORE are ignored for custom
1258 * regulatory cards. Let us notify the changes to the driver,
1259 * as some drivers used this to restore its orig_* reg domain.
1261 if (initiator
== NL80211_REGDOM_SET_BY_CORE
&&
1262 wiphy
->flags
& WIPHY_FLAG_CUSTOM_REGULATORY
&&
1263 wiphy
->reg_notifier
)
1264 wiphy
->reg_notifier(wiphy
, get_last_request());
1268 static void handle_channel_custom(struct wiphy
*wiphy
,
1269 struct ieee80211_channel
*chan
,
1270 const struct ieee80211_regdomain
*regd
)
1273 const struct ieee80211_reg_rule
*reg_rule
= NULL
;
1274 const struct ieee80211_power_rule
*power_rule
= NULL
;
1275 const struct ieee80211_freq_range
*freq_range
= NULL
;
1277 reg_rule
= freq_reg_info_regd(wiphy
, MHZ_TO_KHZ(chan
->center_freq
),
1280 if (IS_ERR(reg_rule
)) {
1281 REG_DBG_PRINT("Disabling freq %d MHz as custom regd has no rule that fits it\n",
1283 chan
->orig_flags
|= IEEE80211_CHAN_DISABLED
;
1284 chan
->flags
= chan
->orig_flags
;
1288 chan_reg_rule_print_dbg(chan
, reg_rule
);
1290 power_rule
= ®_rule
->power_rule
;
1291 freq_range
= ®_rule
->freq_range
;
1293 if (freq_range
->max_bandwidth_khz
< MHZ_TO_KHZ(40))
1294 bw_flags
= IEEE80211_CHAN_NO_HT40
;
1295 if (freq_range
->max_bandwidth_khz
< MHZ_TO_KHZ(80))
1296 bw_flags
|= IEEE80211_CHAN_NO_80MHZ
;
1297 if (freq_range
->max_bandwidth_khz
< MHZ_TO_KHZ(160))
1298 bw_flags
|= IEEE80211_CHAN_NO_160MHZ
;
1300 chan
->flags
|= map_regdom_flags(reg_rule
->flags
) | bw_flags
;
1301 chan
->max_antenna_gain
= (int) MBI_TO_DBI(power_rule
->max_antenna_gain
);
1302 chan
->max_reg_power
= chan
->max_power
=
1303 (int) MBM_TO_DBM(power_rule
->max_eirp
);
1306 static void handle_band_custom(struct wiphy
*wiphy
,
1307 struct ieee80211_supported_band
*sband
,
1308 const struct ieee80211_regdomain
*regd
)
1315 for (i
= 0; i
< sband
->n_channels
; i
++)
1316 handle_channel_custom(wiphy
, &sband
->channels
[i
], regd
);
1319 /* Used by drivers prior to wiphy registration */
1320 void wiphy_apply_custom_regulatory(struct wiphy
*wiphy
,
1321 const struct ieee80211_regdomain
*regd
)
1323 enum ieee80211_band band
;
1324 unsigned int bands_set
= 0;
1326 WARN(!(wiphy
->flags
& WIPHY_FLAG_CUSTOM_REGULATORY
),
1327 "wiphy should have WIPHY_FLAG_CUSTOM_REGULATORY\n");
1328 wiphy
->flags
|= WIPHY_FLAG_CUSTOM_REGULATORY
;
1330 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++) {
1331 if (!wiphy
->bands
[band
])
1333 handle_band_custom(wiphy
, wiphy
->bands
[band
], regd
);
1338 * no point in calling this if it won't have any effect
1339 * on your device's supported bands.
1341 WARN_ON(!bands_set
);
1343 EXPORT_SYMBOL(wiphy_apply_custom_regulatory
);
1345 static void reg_set_request_processed(void)
1347 bool need_more_processing
= false;
1348 struct regulatory_request
*lr
= get_last_request();
1350 lr
->processed
= true;
1352 spin_lock(®_requests_lock
);
1353 if (!list_empty(®_requests_list
))
1354 need_more_processing
= true;
1355 spin_unlock(®_requests_lock
);
1357 if (lr
->initiator
== NL80211_REGDOM_SET_BY_USER
)
1358 cancel_delayed_work(®_timeout
);
1360 if (need_more_processing
)
1361 schedule_work(®_work
);
1365 * reg_process_hint_core - process core regulatory requests
1366 * @pending_request: a pending core regulatory request
1368 * The wireless subsystem can use this function to process
1369 * a regulatory request issued by the regulatory core.
1371 * Returns one of the different reg request treatment values.
1373 static enum reg_request_treatment
1374 reg_process_hint_core(struct regulatory_request
*core_request
)
1377 core_request
->intersect
= false;
1378 core_request
->processed
= false;
1380 reg_update_last_request(core_request
);
1382 return reg_call_crda(core_request
);
1385 static enum reg_request_treatment
1386 __reg_process_hint_user(struct regulatory_request
*user_request
)
1388 struct regulatory_request
*lr
= get_last_request();
1390 if (reg_request_cell_base(user_request
))
1391 return reg_ignore_cell_hint(user_request
);
1393 if (reg_request_cell_base(lr
))
1394 return REG_REQ_IGNORE
;
1396 if (lr
->initiator
== NL80211_REGDOM_SET_BY_COUNTRY_IE
)
1397 return REG_REQ_INTERSECT
;
1399 * If the user knows better the user should set the regdom
1400 * to their country before the IE is picked up
1402 if (lr
->initiator
== NL80211_REGDOM_SET_BY_USER
&&
1404 return REG_REQ_IGNORE
;
1406 * Process user requests only after previous user/driver/core
1407 * requests have been processed
1409 if ((lr
->initiator
== NL80211_REGDOM_SET_BY_CORE
||
1410 lr
->initiator
== NL80211_REGDOM_SET_BY_DRIVER
||
1411 lr
->initiator
== NL80211_REGDOM_SET_BY_USER
) &&
1412 regdom_changes(lr
->alpha2
))
1413 return REG_REQ_IGNORE
;
1415 if (!regdom_changes(user_request
->alpha2
))
1416 return REG_REQ_ALREADY_SET
;
1422 * reg_process_hint_user - process user regulatory requests
1423 * @user_request: a pending user regulatory request
1425 * The wireless subsystem can use this function to process
1426 * a regulatory request initiated by userspace.
1428 * Returns one of the different reg request treatment values.
1430 static enum reg_request_treatment
1431 reg_process_hint_user(struct regulatory_request
*user_request
)
1433 enum reg_request_treatment treatment
;
1435 treatment
= __reg_process_hint_user(user_request
);
1436 if (treatment
== REG_REQ_IGNORE
||
1437 treatment
== REG_REQ_ALREADY_SET
) {
1438 kfree(user_request
);
1442 user_request
->intersect
= treatment
== REG_REQ_INTERSECT
;
1443 user_request
->processed
= false;
1445 reg_update_last_request(user_request
);
1447 user_alpha2
[0] = user_request
->alpha2
[0];
1448 user_alpha2
[1] = user_request
->alpha2
[1];
1450 return reg_call_crda(user_request
);
1453 static enum reg_request_treatment
1454 __reg_process_hint_driver(struct regulatory_request
*driver_request
)
1456 struct regulatory_request
*lr
= get_last_request();
1458 if (lr
->initiator
== NL80211_REGDOM_SET_BY_CORE
) {
1459 if (regdom_changes(driver_request
->alpha2
))
1461 return REG_REQ_ALREADY_SET
;
1465 * This would happen if you unplug and plug your card
1466 * back in or if you add a new device for which the previously
1467 * loaded card also agrees on the regulatory domain.
1469 if (lr
->initiator
== NL80211_REGDOM_SET_BY_DRIVER
&&
1470 !regdom_changes(driver_request
->alpha2
))
1471 return REG_REQ_ALREADY_SET
;
1473 return REG_REQ_INTERSECT
;
1477 * reg_process_hint_driver - process driver regulatory requests
1478 * @driver_request: a pending driver regulatory request
1480 * The wireless subsystem can use this function to process
1481 * a regulatory request issued by an 802.11 driver.
1483 * Returns one of the different reg request treatment values.
1485 static enum reg_request_treatment
1486 reg_process_hint_driver(struct wiphy
*wiphy
,
1487 struct regulatory_request
*driver_request
)
1489 const struct ieee80211_regdomain
*regd
;
1490 enum reg_request_treatment treatment
;
1492 treatment
= __reg_process_hint_driver(driver_request
);
1494 switch (treatment
) {
1497 case REG_REQ_IGNORE
:
1498 kfree(driver_request
);
1500 case REG_REQ_INTERSECT
:
1502 case REG_REQ_ALREADY_SET
:
1503 regd
= reg_copy_regd(get_cfg80211_regdom());
1505 kfree(driver_request
);
1506 return REG_REQ_IGNORE
;
1508 rcu_assign_pointer(wiphy
->regd
, regd
);
1512 driver_request
->intersect
= treatment
== REG_REQ_INTERSECT
;
1513 driver_request
->processed
= false;
1515 reg_update_last_request(driver_request
);
1518 * Since CRDA will not be called in this case as we already
1519 * have applied the requested regulatory domain before we just
1520 * inform userspace we have processed the request
1522 if (treatment
== REG_REQ_ALREADY_SET
) {
1523 nl80211_send_reg_change_event(driver_request
);
1524 reg_set_request_processed();
1528 return reg_call_crda(driver_request
);
1531 static enum reg_request_treatment
1532 __reg_process_hint_country_ie(struct wiphy
*wiphy
,
1533 struct regulatory_request
*country_ie_request
)
1535 struct wiphy
*last_wiphy
= NULL
;
1536 struct regulatory_request
*lr
= get_last_request();
1538 if (reg_request_cell_base(lr
)) {
1539 /* Trust a Cell base station over the AP's country IE */
1540 if (regdom_changes(country_ie_request
->alpha2
))
1541 return REG_REQ_IGNORE
;
1542 return REG_REQ_ALREADY_SET
;
1545 if (unlikely(!is_an_alpha2(country_ie_request
->alpha2
)))
1548 if (lr
->initiator
!= NL80211_REGDOM_SET_BY_COUNTRY_IE
)
1551 last_wiphy
= wiphy_idx_to_wiphy(lr
->wiphy_idx
);
1553 if (last_wiphy
!= wiphy
) {
1555 * Two cards with two APs claiming different
1556 * Country IE alpha2s. We could
1557 * intersect them, but that seems unlikely
1558 * to be correct. Reject second one for now.
1560 if (regdom_changes(country_ie_request
->alpha2
))
1561 return REG_REQ_IGNORE
;
1562 return REG_REQ_ALREADY_SET
;
1565 * Two consecutive Country IE hints on the same wiphy.
1566 * This should be picked up early by the driver/stack
1568 if (WARN_ON(regdom_changes(country_ie_request
->alpha2
)))
1570 return REG_REQ_ALREADY_SET
;
1574 * reg_process_hint_country_ie - process regulatory requests from country IEs
1575 * @country_ie_request: a regulatory request from a country IE
1577 * The wireless subsystem can use this function to process
1578 * a regulatory request issued by a country Information Element.
1580 * Returns one of the different reg request treatment values.
1582 static enum reg_request_treatment
1583 reg_process_hint_country_ie(struct wiphy
*wiphy
,
1584 struct regulatory_request
*country_ie_request
)
1586 enum reg_request_treatment treatment
;
1588 treatment
= __reg_process_hint_country_ie(wiphy
, country_ie_request
);
1590 switch (treatment
) {
1593 case REG_REQ_IGNORE
:
1595 case REG_REQ_ALREADY_SET
:
1596 kfree(country_ie_request
);
1598 case REG_REQ_INTERSECT
:
1599 kfree(country_ie_request
);
1601 * This doesn't happen yet, not sure we
1602 * ever want to support it for this case.
1604 WARN_ONCE(1, "Unexpected intersection for country IEs");
1605 return REG_REQ_IGNORE
;
1608 country_ie_request
->intersect
= false;
1609 country_ie_request
->processed
= false;
1611 reg_update_last_request(country_ie_request
);
1613 return reg_call_crda(country_ie_request
);
1616 /* This processes *all* regulatory hints */
1617 static void reg_process_hint(struct regulatory_request
*reg_request
)
1619 struct wiphy
*wiphy
= NULL
;
1620 enum reg_request_treatment treatment
;
1622 if (WARN_ON(!reg_request
->alpha2
))
1625 if (reg_request
->wiphy_idx
!= WIPHY_IDX_INVALID
)
1626 wiphy
= wiphy_idx_to_wiphy(reg_request
->wiphy_idx
);
1628 if (reg_request
->initiator
== NL80211_REGDOM_SET_BY_DRIVER
&& !wiphy
) {
1633 switch (reg_request
->initiator
) {
1634 case NL80211_REGDOM_SET_BY_CORE
:
1635 reg_process_hint_core(reg_request
);
1637 case NL80211_REGDOM_SET_BY_USER
:
1638 treatment
= reg_process_hint_user(reg_request
);
1639 if (treatment
== REG_REQ_OK
||
1640 treatment
== REG_REQ_ALREADY_SET
)
1642 schedule_delayed_work(®_timeout
, msecs_to_jiffies(3142));
1644 case NL80211_REGDOM_SET_BY_DRIVER
:
1645 treatment
= reg_process_hint_driver(wiphy
, reg_request
);
1647 case NL80211_REGDOM_SET_BY_COUNTRY_IE
:
1648 treatment
= reg_process_hint_country_ie(wiphy
, reg_request
);
1651 WARN(1, "invalid initiator %d\n", reg_request
->initiator
);
1655 /* This is required so that the orig_* parameters are saved */
1656 if (treatment
== REG_REQ_ALREADY_SET
&& wiphy
&&
1657 wiphy
->flags
& WIPHY_FLAG_STRICT_REGULATORY
)
1658 wiphy_update_regulatory(wiphy
, reg_request
->initiator
);
1662 * Processes regulatory hints, this is all the NL80211_REGDOM_SET_BY_*
1663 * Regulatory hints come on a first come first serve basis and we
1664 * must process each one atomically.
1666 static void reg_process_pending_hints(void)
1668 struct regulatory_request
*reg_request
, *lr
;
1670 lr
= get_last_request();
1672 /* When last_request->processed becomes true this will be rescheduled */
1673 if (lr
&& !lr
->processed
) {
1674 REG_DBG_PRINT("Pending regulatory request, waiting for it to be processed...\n");
1678 spin_lock(®_requests_lock
);
1680 if (list_empty(®_requests_list
)) {
1681 spin_unlock(®_requests_lock
);
1685 reg_request
= list_first_entry(®_requests_list
,
1686 struct regulatory_request
,
1688 list_del_init(®_request
->list
);
1690 spin_unlock(®_requests_lock
);
1692 reg_process_hint(reg_request
);
1695 /* Processes beacon hints -- this has nothing to do with country IEs */
1696 static void reg_process_pending_beacon_hints(void)
1698 struct cfg80211_registered_device
*rdev
;
1699 struct reg_beacon
*pending_beacon
, *tmp
;
1701 /* This goes through the _pending_ beacon list */
1702 spin_lock_bh(®_pending_beacons_lock
);
1704 list_for_each_entry_safe(pending_beacon
, tmp
,
1705 ®_pending_beacons
, list
) {
1706 list_del_init(&pending_beacon
->list
);
1708 /* Applies the beacon hint to current wiphys */
1709 list_for_each_entry(rdev
, &cfg80211_rdev_list
, list
)
1710 wiphy_update_new_beacon(&rdev
->wiphy
, pending_beacon
);
1712 /* Remembers the beacon hint for new wiphys or reg changes */
1713 list_add_tail(&pending_beacon
->list
, ®_beacon_list
);
1716 spin_unlock_bh(®_pending_beacons_lock
);
1719 static void reg_todo(struct work_struct
*work
)
1722 reg_process_pending_hints();
1723 reg_process_pending_beacon_hints();
1727 static void queue_regulatory_request(struct regulatory_request
*request
)
1729 request
->alpha2
[0] = toupper(request
->alpha2
[0]);
1730 request
->alpha2
[1] = toupper(request
->alpha2
[1]);
1732 spin_lock(®_requests_lock
);
1733 list_add_tail(&request
->list
, ®_requests_list
);
1734 spin_unlock(®_requests_lock
);
1736 schedule_work(®_work
);
1740 * Core regulatory hint -- happens during cfg80211_init()
1741 * and when we restore regulatory settings.
1743 static int regulatory_hint_core(const char *alpha2
)
1745 struct regulatory_request
*request
;
1747 request
= kzalloc(sizeof(struct regulatory_request
), GFP_KERNEL
);
1751 request
->alpha2
[0] = alpha2
[0];
1752 request
->alpha2
[1] = alpha2
[1];
1753 request
->initiator
= NL80211_REGDOM_SET_BY_CORE
;
1755 queue_regulatory_request(request
);
1761 int regulatory_hint_user(const char *alpha2
,
1762 enum nl80211_user_reg_hint_type user_reg_hint_type
)
1764 struct regulatory_request
*request
;
1766 if (WARN_ON(!alpha2
))
1769 request
= kzalloc(sizeof(struct regulatory_request
), GFP_KERNEL
);
1773 request
->wiphy_idx
= WIPHY_IDX_INVALID
;
1774 request
->alpha2
[0] = alpha2
[0];
1775 request
->alpha2
[1] = alpha2
[1];
1776 request
->initiator
= NL80211_REGDOM_SET_BY_USER
;
1777 request
->user_reg_hint_type
= user_reg_hint_type
;
1779 queue_regulatory_request(request
);
1785 int regulatory_hint(struct wiphy
*wiphy
, const char *alpha2
)
1787 struct regulatory_request
*request
;
1789 if (WARN_ON(!alpha2
|| !wiphy
))
1792 request
= kzalloc(sizeof(struct regulatory_request
), GFP_KERNEL
);
1796 request
->wiphy_idx
= get_wiphy_idx(wiphy
);
1798 request
->alpha2
[0] = alpha2
[0];
1799 request
->alpha2
[1] = alpha2
[1];
1800 request
->initiator
= NL80211_REGDOM_SET_BY_DRIVER
;
1802 queue_regulatory_request(request
);
1806 EXPORT_SYMBOL(regulatory_hint
);
1808 void regulatory_hint_country_ie(struct wiphy
*wiphy
, enum ieee80211_band band
,
1809 const u8
*country_ie
, u8 country_ie_len
)
1812 enum environment_cap env
= ENVIRON_ANY
;
1813 struct regulatory_request
*request
= NULL
, *lr
;
1815 /* IE len must be evenly divisible by 2 */
1816 if (country_ie_len
& 0x01)
1819 if (country_ie_len
< IEEE80211_COUNTRY_IE_MIN_LEN
)
1822 request
= kzalloc(sizeof(*request
), GFP_KERNEL
);
1826 alpha2
[0] = country_ie
[0];
1827 alpha2
[1] = country_ie
[1];
1829 if (country_ie
[2] == 'I')
1830 env
= ENVIRON_INDOOR
;
1831 else if (country_ie
[2] == 'O')
1832 env
= ENVIRON_OUTDOOR
;
1835 lr
= get_last_request();
1841 * We will run this only upon a successful connection on cfg80211.
1842 * We leave conflict resolution to the workqueue, where can hold
1845 if (lr
->initiator
== NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
1846 lr
->wiphy_idx
!= WIPHY_IDX_INVALID
)
1849 request
->wiphy_idx
= get_wiphy_idx(wiphy
);
1850 request
->alpha2
[0] = alpha2
[0];
1851 request
->alpha2
[1] = alpha2
[1];
1852 request
->initiator
= NL80211_REGDOM_SET_BY_COUNTRY_IE
;
1853 request
->country_ie_env
= env
;
1855 queue_regulatory_request(request
);
1862 static void restore_alpha2(char *alpha2
, bool reset_user
)
1864 /* indicates there is no alpha2 to consider for restoration */
1868 /* The user setting has precedence over the module parameter */
1869 if (is_user_regdom_saved()) {
1870 /* Unless we're asked to ignore it and reset it */
1872 REG_DBG_PRINT("Restoring regulatory settings including user preference\n");
1873 user_alpha2
[0] = '9';
1874 user_alpha2
[1] = '7';
1877 * If we're ignoring user settings, we still need to
1878 * check the module parameter to ensure we put things
1879 * back as they were for a full restore.
1881 if (!is_world_regdom(ieee80211_regdom
)) {
1882 REG_DBG_PRINT("Keeping preference on module parameter ieee80211_regdom: %c%c\n",
1883 ieee80211_regdom
[0], ieee80211_regdom
[1]);
1884 alpha2
[0] = ieee80211_regdom
[0];
1885 alpha2
[1] = ieee80211_regdom
[1];
1888 REG_DBG_PRINT("Restoring regulatory settings while preserving user preference for: %c%c\n",
1889 user_alpha2
[0], user_alpha2
[1]);
1890 alpha2
[0] = user_alpha2
[0];
1891 alpha2
[1] = user_alpha2
[1];
1893 } else if (!is_world_regdom(ieee80211_regdom
)) {
1894 REG_DBG_PRINT("Keeping preference on module parameter ieee80211_regdom: %c%c\n",
1895 ieee80211_regdom
[0], ieee80211_regdom
[1]);
1896 alpha2
[0] = ieee80211_regdom
[0];
1897 alpha2
[1] = ieee80211_regdom
[1];
1899 REG_DBG_PRINT("Restoring regulatory settings\n");
1902 static void restore_custom_reg_settings(struct wiphy
*wiphy
)
1904 struct ieee80211_supported_band
*sband
;
1905 enum ieee80211_band band
;
1906 struct ieee80211_channel
*chan
;
1909 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++) {
1910 sband
= wiphy
->bands
[band
];
1913 for (i
= 0; i
< sband
->n_channels
; i
++) {
1914 chan
= &sband
->channels
[i
];
1915 chan
->flags
= chan
->orig_flags
;
1916 chan
->max_antenna_gain
= chan
->orig_mag
;
1917 chan
->max_power
= chan
->orig_mpwr
;
1918 chan
->beacon_found
= false;
1924 * Restoring regulatory settings involves ingoring any
1925 * possibly stale country IE information and user regulatory
1926 * settings if so desired, this includes any beacon hints
1927 * learned as we could have traveled outside to another country
1928 * after disconnection. To restore regulatory settings we do
1929 * exactly what we did at bootup:
1931 * - send a core regulatory hint
1932 * - send a user regulatory hint if applicable
1934 * Device drivers that send a regulatory hint for a specific country
1935 * keep their own regulatory domain on wiphy->regd so that does does
1936 * not need to be remembered.
1938 static void restore_regulatory_settings(bool reset_user
)
1941 char world_alpha2
[2];
1942 struct reg_beacon
*reg_beacon
, *btmp
;
1943 struct regulatory_request
*reg_request
, *tmp
;
1944 LIST_HEAD(tmp_reg_req_list
);
1945 struct cfg80211_registered_device
*rdev
;
1949 reset_regdomains(true, &world_regdom
);
1950 restore_alpha2(alpha2
, reset_user
);
1953 * If there's any pending requests we simply
1954 * stash them to a temporary pending queue and
1955 * add then after we've restored regulatory
1958 spin_lock(®_requests_lock
);
1959 list_for_each_entry_safe(reg_request
, tmp
, ®_requests_list
, list
) {
1960 if (reg_request
->initiator
!= NL80211_REGDOM_SET_BY_USER
)
1962 list_move_tail(®_request
->list
, &tmp_reg_req_list
);
1964 spin_unlock(®_requests_lock
);
1966 /* Clear beacon hints */
1967 spin_lock_bh(®_pending_beacons_lock
);
1968 list_for_each_entry_safe(reg_beacon
, btmp
, ®_pending_beacons
, list
) {
1969 list_del(®_beacon
->list
);
1972 spin_unlock_bh(®_pending_beacons_lock
);
1974 list_for_each_entry_safe(reg_beacon
, btmp
, ®_beacon_list
, list
) {
1975 list_del(®_beacon
->list
);
1979 /* First restore to the basic regulatory settings */
1980 world_alpha2
[0] = cfg80211_world_regdom
->alpha2
[0];
1981 world_alpha2
[1] = cfg80211_world_regdom
->alpha2
[1];
1983 list_for_each_entry(rdev
, &cfg80211_rdev_list
, list
) {
1984 if (rdev
->wiphy
.flags
& WIPHY_FLAG_CUSTOM_REGULATORY
)
1985 restore_custom_reg_settings(&rdev
->wiphy
);
1988 regulatory_hint_core(world_alpha2
);
1991 * This restores the ieee80211_regdom module parameter
1992 * preference or the last user requested regulatory
1993 * settings, user regulatory settings takes precedence.
1995 if (is_an_alpha2(alpha2
))
1996 regulatory_hint_user(user_alpha2
, NL80211_USER_REG_HINT_USER
);
1998 spin_lock(®_requests_lock
);
1999 list_splice_tail_init(&tmp_reg_req_list
, ®_requests_list
);
2000 spin_unlock(®_requests_lock
);
2002 REG_DBG_PRINT("Kicking the queue\n");
2004 schedule_work(®_work
);
2007 void regulatory_hint_disconnect(void)
2009 REG_DBG_PRINT("All devices are disconnected, going to restore regulatory settings\n");
2010 restore_regulatory_settings(false);
2013 static bool freq_is_chan_12_13_14(u16 freq
)
2015 if (freq
== ieee80211_channel_to_frequency(12, IEEE80211_BAND_2GHZ
) ||
2016 freq
== ieee80211_channel_to_frequency(13, IEEE80211_BAND_2GHZ
) ||
2017 freq
== ieee80211_channel_to_frequency(14, IEEE80211_BAND_2GHZ
))
2022 static bool pending_reg_beacon(struct ieee80211_channel
*beacon_chan
)
2024 struct reg_beacon
*pending_beacon
;
2026 list_for_each_entry(pending_beacon
, ®_pending_beacons
, list
)
2027 if (beacon_chan
->center_freq
==
2028 pending_beacon
->chan
.center_freq
)
2033 int regulatory_hint_found_beacon(struct wiphy
*wiphy
,
2034 struct ieee80211_channel
*beacon_chan
,
2037 struct reg_beacon
*reg_beacon
;
2040 if (beacon_chan
->beacon_found
||
2041 beacon_chan
->flags
& IEEE80211_CHAN_RADAR
||
2042 (beacon_chan
->band
== IEEE80211_BAND_2GHZ
&&
2043 !freq_is_chan_12_13_14(beacon_chan
->center_freq
)))
2046 spin_lock_bh(®_pending_beacons_lock
);
2047 processing
= pending_reg_beacon(beacon_chan
);
2048 spin_unlock_bh(®_pending_beacons_lock
);
2053 reg_beacon
= kzalloc(sizeof(struct reg_beacon
), gfp
);
2057 REG_DBG_PRINT("Found new beacon on frequency: %d MHz (Ch %d) on %s\n",
2058 beacon_chan
->center_freq
,
2059 ieee80211_frequency_to_channel(beacon_chan
->center_freq
),
2062 memcpy(®_beacon
->chan
, beacon_chan
,
2063 sizeof(struct ieee80211_channel
));
2066 * Since we can be called from BH or and non-BH context
2067 * we must use spin_lock_bh()
2069 spin_lock_bh(®_pending_beacons_lock
);
2070 list_add_tail(®_beacon
->list
, ®_pending_beacons
);
2071 spin_unlock_bh(®_pending_beacons_lock
);
2073 schedule_work(®_work
);
2078 static void print_rd_rules(const struct ieee80211_regdomain
*rd
)
2081 const struct ieee80211_reg_rule
*reg_rule
= NULL
;
2082 const struct ieee80211_freq_range
*freq_range
= NULL
;
2083 const struct ieee80211_power_rule
*power_rule
= NULL
;
2085 pr_info(" (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)\n");
2087 for (i
= 0; i
< rd
->n_reg_rules
; i
++) {
2088 reg_rule
= &rd
->reg_rules
[i
];
2089 freq_range
= ®_rule
->freq_range
;
2090 power_rule
= ®_rule
->power_rule
;
2093 * There may not be documentation for max antenna gain
2094 * in certain regions
2096 if (power_rule
->max_antenna_gain
)
2097 pr_info(" (%d KHz - %d KHz @ %d KHz), (%d mBi, %d mBm)\n",
2098 freq_range
->start_freq_khz
,
2099 freq_range
->end_freq_khz
,
2100 freq_range
->max_bandwidth_khz
,
2101 power_rule
->max_antenna_gain
,
2102 power_rule
->max_eirp
);
2104 pr_info(" (%d KHz - %d KHz @ %d KHz), (N/A, %d mBm)\n",
2105 freq_range
->start_freq_khz
,
2106 freq_range
->end_freq_khz
,
2107 freq_range
->max_bandwidth_khz
,
2108 power_rule
->max_eirp
);
2112 bool reg_supported_dfs_region(u8 dfs_region
)
2114 switch (dfs_region
) {
2115 case NL80211_DFS_UNSET
:
2116 case NL80211_DFS_FCC
:
2117 case NL80211_DFS_ETSI
:
2118 case NL80211_DFS_JP
:
2121 REG_DBG_PRINT("Ignoring uknown DFS master region: %d\n",
2127 static void print_dfs_region(u8 dfs_region
)
2132 switch (dfs_region
) {
2133 case NL80211_DFS_FCC
:
2134 pr_info(" DFS Master region FCC");
2136 case NL80211_DFS_ETSI
:
2137 pr_info(" DFS Master region ETSI");
2139 case NL80211_DFS_JP
:
2140 pr_info(" DFS Master region JP");
2143 pr_info(" DFS Master region Unknown");
2148 static void print_regdomain(const struct ieee80211_regdomain
*rd
)
2150 struct regulatory_request
*lr
= get_last_request();
2152 if (is_intersected_alpha2(rd
->alpha2
)) {
2153 if (lr
->initiator
== NL80211_REGDOM_SET_BY_COUNTRY_IE
) {
2154 struct cfg80211_registered_device
*rdev
;
2155 rdev
= cfg80211_rdev_by_wiphy_idx(lr
->wiphy_idx
);
2157 pr_info("Current regulatory domain updated by AP to: %c%c\n",
2158 rdev
->country_ie_alpha2
[0],
2159 rdev
->country_ie_alpha2
[1]);
2161 pr_info("Current regulatory domain intersected:\n");
2163 pr_info("Current regulatory domain intersected:\n");
2164 } else if (is_world_regdom(rd
->alpha2
)) {
2165 pr_info("World regulatory domain updated:\n");
2167 if (is_unknown_alpha2(rd
->alpha2
))
2168 pr_info("Regulatory domain changed to driver built-in settings (unknown country)\n");
2170 if (reg_request_cell_base(lr
))
2171 pr_info("Regulatory domain changed to country: %c%c by Cell Station\n",
2172 rd
->alpha2
[0], rd
->alpha2
[1]);
2174 pr_info("Regulatory domain changed to country: %c%c\n",
2175 rd
->alpha2
[0], rd
->alpha2
[1]);
2179 print_dfs_region(rd
->dfs_region
);
2183 static void print_regdomain_info(const struct ieee80211_regdomain
*rd
)
2185 pr_info("Regulatory domain: %c%c\n", rd
->alpha2
[0], rd
->alpha2
[1]);
2189 /* Takes ownership of rd only if it doesn't fail */
2190 static int __set_regdom(const struct ieee80211_regdomain
*rd
)
2192 const struct ieee80211_regdomain
*regd
;
2193 const struct ieee80211_regdomain
*intersected_rd
= NULL
;
2194 struct wiphy
*request_wiphy
;
2195 struct regulatory_request
*lr
= get_last_request();
2197 /* Some basic sanity checks first */
2199 if (!reg_is_valid_request(rd
->alpha2
))
2202 if (is_world_regdom(rd
->alpha2
)) {
2203 if (lr
->initiator
!= NL80211_REGDOM_SET_BY_CORE
)
2205 update_world_regdomain(rd
);
2209 if (!is_alpha2_set(rd
->alpha2
) && !is_an_alpha2(rd
->alpha2
) &&
2210 !is_unknown_alpha2(rd
->alpha2
))
2214 * Lets only bother proceeding on the same alpha2 if the current
2215 * rd is non static (it means CRDA was present and was used last)
2216 * and the pending request came in from a country IE
2218 if (lr
->initiator
!= NL80211_REGDOM_SET_BY_COUNTRY_IE
) {
2220 * If someone else asked us to change the rd lets only bother
2221 * checking if the alpha2 changes if CRDA was already called
2223 if (!regdom_changes(rd
->alpha2
))
2228 * Now lets set the regulatory domain, update all driver channels
2229 * and finally inform them of what we have done, in case they want
2230 * to review or adjust their own settings based on their own
2231 * internal EEPROM data
2234 if (!is_valid_rd(rd
)) {
2235 pr_err("Invalid regulatory domain detected:\n");
2236 print_regdomain_info(rd
);
2240 request_wiphy
= wiphy_idx_to_wiphy(lr
->wiphy_idx
);
2241 if (!request_wiphy
&&
2242 (lr
->initiator
== NL80211_REGDOM_SET_BY_DRIVER
||
2243 lr
->initiator
== NL80211_REGDOM_SET_BY_COUNTRY_IE
)) {
2244 schedule_delayed_work(®_timeout
, 0);
2248 if (!lr
->intersect
) {
2249 if (lr
->initiator
!= NL80211_REGDOM_SET_BY_DRIVER
) {
2250 reset_regdomains(false, rd
);
2255 * For a driver hint, lets copy the regulatory domain the
2256 * driver wanted to the wiphy to deal with conflicts
2260 * Userspace could have sent two replies with only
2261 * one kernel request.
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 /* Intersection requires a bit more work */
2277 if (lr
->initiator
!= NL80211_REGDOM_SET_BY_COUNTRY_IE
) {
2278 intersected_rd
= regdom_intersect(rd
, get_cfg80211_regdom());
2279 if (!intersected_rd
)
2283 * We can trash what CRDA provided now.
2284 * However if a driver requested this specific regulatory
2285 * domain we keep it for its private use
2287 if (lr
->initiator
== NL80211_REGDOM_SET_BY_DRIVER
) {
2288 const struct ieee80211_regdomain
*tmp
;
2290 tmp
= get_wiphy_regdom(request_wiphy
);
2291 rcu_assign_pointer(request_wiphy
->regd
, rd
);
2292 rcu_free_regdom(tmp
);
2299 reset_regdomains(false, intersected_rd
);
2309 * Use this call to set the current regulatory domain. Conflicts with
2310 * multiple drivers can be ironed out later. Caller must've already
2311 * kmalloc'd the rd structure.
2313 int set_regdom(const struct ieee80211_regdomain
*rd
)
2315 struct regulatory_request
*lr
;
2318 lr
= get_last_request();
2320 /* Note that this doesn't update the wiphys, this is done below */
2321 r
= __set_regdom(rd
);
2324 reg_set_request_processed();
2330 /* This would make this whole thing pointless */
2331 if (WARN_ON(!lr
->intersect
&& rd
!= get_cfg80211_regdom()))
2334 /* update all wiphys now with the new established regulatory domain */
2335 update_all_wiphy_regulatory(lr
->initiator
);
2337 print_regdomain(get_cfg80211_regdom());
2339 nl80211_send_reg_change_event(lr
);
2341 reg_set_request_processed();
2346 int reg_device_uevent(struct device
*dev
, struct kobj_uevent_env
*env
)
2348 struct regulatory_request
*lr
;
2353 lr
= get_last_request();
2354 if (lr
&& !lr
->processed
) {
2355 memcpy(alpha2
, lr
->alpha2
, 2);
2361 return add_uevent_var(env
, "COUNTRY=%c%c",
2362 alpha2
[0], alpha2
[1]);
2366 void wiphy_regulatory_register(struct wiphy
*wiphy
)
2368 struct regulatory_request
*lr
;
2370 if (!reg_dev_ignore_cell_hint(wiphy
))
2371 reg_num_devs_support_basehint
++;
2373 lr
= get_last_request();
2374 wiphy_update_regulatory(wiphy
, lr
->initiator
);
2377 void wiphy_regulatory_deregister(struct wiphy
*wiphy
)
2379 struct wiphy
*request_wiphy
= NULL
;
2380 struct regulatory_request
*lr
;
2382 lr
= get_last_request();
2384 if (!reg_dev_ignore_cell_hint(wiphy
))
2385 reg_num_devs_support_basehint
--;
2387 rcu_free_regdom(get_wiphy_regdom(wiphy
));
2388 rcu_assign_pointer(wiphy
->regd
, NULL
);
2391 request_wiphy
= wiphy_idx_to_wiphy(lr
->wiphy_idx
);
2393 if (!request_wiphy
|| request_wiphy
!= wiphy
)
2396 lr
->wiphy_idx
= WIPHY_IDX_INVALID
;
2397 lr
->country_ie_env
= ENVIRON_ANY
;
2400 static void reg_timeout_work(struct work_struct
*work
)
2402 REG_DBG_PRINT("Timeout while waiting for CRDA to reply, restoring regulatory settings\n");
2404 restore_regulatory_settings(true);
2408 int __init
regulatory_init(void)
2412 reg_pdev
= platform_device_register_simple("regulatory", 0, NULL
, 0);
2413 if (IS_ERR(reg_pdev
))
2414 return PTR_ERR(reg_pdev
);
2416 reg_pdev
->dev
.type
= ®_device_type
;
2418 spin_lock_init(®_requests_lock
);
2419 spin_lock_init(®_pending_beacons_lock
);
2421 reg_regdb_size_check();
2423 rcu_assign_pointer(cfg80211_regdomain
, cfg80211_world_regdom
);
2425 user_alpha2
[0] = '9';
2426 user_alpha2
[1] = '7';
2428 /* We always try to get an update for the static regdomain */
2429 err
= regulatory_hint_core(cfg80211_world_regdom
->alpha2
);
2434 * N.B. kobject_uevent_env() can fail mainly for when we're out
2435 * memory which is handled and propagated appropriately above
2436 * but it can also fail during a netlink_broadcast() or during
2437 * early boot for call_usermodehelper(). For now treat these
2438 * errors as non-fatal.
2440 pr_err("kobject_uevent_env() was unable to call CRDA during init\n");
2444 * Finally, if the user set the module parameter treat it
2447 if (!is_world_regdom(ieee80211_regdom
))
2448 regulatory_hint_user(ieee80211_regdom
,
2449 NL80211_USER_REG_HINT_USER
);
2454 void regulatory_exit(void)
2456 struct regulatory_request
*reg_request
, *tmp
;
2457 struct reg_beacon
*reg_beacon
, *btmp
;
2459 cancel_work_sync(®_work
);
2460 cancel_delayed_work_sync(®_timeout
);
2462 /* Lock to suppress warnings */
2464 reset_regdomains(true, NULL
);
2467 dev_set_uevent_suppress(®_pdev
->dev
, true);
2469 platform_device_unregister(reg_pdev
);
2471 list_for_each_entry_safe(reg_beacon
, btmp
, ®_pending_beacons
, list
) {
2472 list_del(®_beacon
->list
);
2476 list_for_each_entry_safe(reg_beacon
, btmp
, ®_beacon_list
, list
) {
2477 list_del(®_beacon
->list
);
2481 list_for_each_entry_safe(reg_request
, tmp
, ®_requests_list
, list
) {
2482 list_del(®_request
->list
);