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 bool reg_is_valid_request(const char *alpha2
)
467 struct regulatory_request
*lr
= get_last_request();
469 if (!lr
|| lr
->processed
)
472 return alpha2_equal(lr
->alpha2
, alpha2
);
475 /* Sanity check on a regulatory rule */
476 static bool is_valid_reg_rule(const struct ieee80211_reg_rule
*rule
)
478 const struct ieee80211_freq_range
*freq_range
= &rule
->freq_range
;
481 if (freq_range
->start_freq_khz
<= 0 || freq_range
->end_freq_khz
<= 0)
484 if (freq_range
->start_freq_khz
> freq_range
->end_freq_khz
)
487 freq_diff
= freq_range
->end_freq_khz
- freq_range
->start_freq_khz
;
489 if (freq_range
->end_freq_khz
<= freq_range
->start_freq_khz
||
490 freq_range
->max_bandwidth_khz
> freq_diff
)
496 static bool is_valid_rd(const struct ieee80211_regdomain
*rd
)
498 const struct ieee80211_reg_rule
*reg_rule
= NULL
;
501 if (!rd
->n_reg_rules
)
504 if (WARN_ON(rd
->n_reg_rules
> NL80211_MAX_SUPP_REG_RULES
))
507 for (i
= 0; i
< rd
->n_reg_rules
; i
++) {
508 reg_rule
= &rd
->reg_rules
[i
];
509 if (!is_valid_reg_rule(reg_rule
))
516 static bool reg_does_bw_fit(const struct ieee80211_freq_range
*freq_range
,
517 u32 center_freq_khz
, u32 bw_khz
)
519 u32 start_freq_khz
, end_freq_khz
;
521 start_freq_khz
= center_freq_khz
- (bw_khz
/2);
522 end_freq_khz
= center_freq_khz
+ (bw_khz
/2);
524 if (start_freq_khz
>= freq_range
->start_freq_khz
&&
525 end_freq_khz
<= freq_range
->end_freq_khz
)
532 * freq_in_rule_band - tells us if a frequency is in a frequency band
533 * @freq_range: frequency rule we want to query
534 * @freq_khz: frequency we are inquiring about
536 * This lets us know if a specific frequency rule is or is not relevant to
537 * a specific frequency's band. Bands are device specific and artificial
538 * definitions (the "2.4 GHz band", the "5 GHz band" and the "60GHz band"),
539 * however it is safe for now to assume that a frequency rule should not be
540 * part of a frequency's band if the start freq or end freq are off by more
541 * than 2 GHz for the 2.4 and 5 GHz bands, and by more than 10 GHz for the
543 * This resolution can be lowered and should be considered as we add
544 * regulatory rule support for other "bands".
546 static bool freq_in_rule_band(const struct ieee80211_freq_range
*freq_range
,
549 #define ONE_GHZ_IN_KHZ 1000000
551 * From 802.11ad: directional multi-gigabit (DMG):
552 * Pertaining to operation in a frequency band containing a channel
553 * with the Channel starting frequency above 45 GHz.
555 u32 limit
= freq_khz
> 45 * ONE_GHZ_IN_KHZ
?
556 10 * ONE_GHZ_IN_KHZ
: 2 * ONE_GHZ_IN_KHZ
;
557 if (abs(freq_khz
- freq_range
->start_freq_khz
) <= limit
)
559 if (abs(freq_khz
- freq_range
->end_freq_khz
) <= limit
)
562 #undef ONE_GHZ_IN_KHZ
566 * Helper for regdom_intersect(), this does the real
567 * mathematical intersection fun
569 static int reg_rules_intersect(const struct ieee80211_reg_rule
*rule1
,
570 const struct ieee80211_reg_rule
*rule2
,
571 struct ieee80211_reg_rule
*intersected_rule
)
573 const struct ieee80211_freq_range
*freq_range1
, *freq_range2
;
574 struct ieee80211_freq_range
*freq_range
;
575 const struct ieee80211_power_rule
*power_rule1
, *power_rule2
;
576 struct ieee80211_power_rule
*power_rule
;
579 freq_range1
= &rule1
->freq_range
;
580 freq_range2
= &rule2
->freq_range
;
581 freq_range
= &intersected_rule
->freq_range
;
583 power_rule1
= &rule1
->power_rule
;
584 power_rule2
= &rule2
->power_rule
;
585 power_rule
= &intersected_rule
->power_rule
;
587 freq_range
->start_freq_khz
= max(freq_range1
->start_freq_khz
,
588 freq_range2
->start_freq_khz
);
589 freq_range
->end_freq_khz
= min(freq_range1
->end_freq_khz
,
590 freq_range2
->end_freq_khz
);
591 freq_range
->max_bandwidth_khz
= min(freq_range1
->max_bandwidth_khz
,
592 freq_range2
->max_bandwidth_khz
);
594 freq_diff
= freq_range
->end_freq_khz
- freq_range
->start_freq_khz
;
595 if (freq_range
->max_bandwidth_khz
> freq_diff
)
596 freq_range
->max_bandwidth_khz
= freq_diff
;
598 power_rule
->max_eirp
= min(power_rule1
->max_eirp
,
599 power_rule2
->max_eirp
);
600 power_rule
->max_antenna_gain
= min(power_rule1
->max_antenna_gain
,
601 power_rule2
->max_antenna_gain
);
603 intersected_rule
->flags
= rule1
->flags
| rule2
->flags
;
605 if (!is_valid_reg_rule(intersected_rule
))
612 * regdom_intersect - do the intersection between two regulatory domains
613 * @rd1: first regulatory domain
614 * @rd2: second regulatory domain
616 * Use this function to get the intersection between two regulatory domains.
617 * Once completed we will mark the alpha2 for the rd as intersected, "98",
618 * as no one single alpha2 can represent this regulatory domain.
620 * Returns a pointer to the regulatory domain structure which will hold the
621 * resulting intersection of rules between rd1 and rd2. We will
622 * kzalloc() this structure for you.
624 static struct ieee80211_regdomain
*
625 regdom_intersect(const struct ieee80211_regdomain
*rd1
,
626 const struct ieee80211_regdomain
*rd2
)
630 unsigned int num_rules
= 0, rule_idx
= 0;
631 const struct ieee80211_reg_rule
*rule1
, *rule2
;
632 struct ieee80211_reg_rule
*intersected_rule
;
633 struct ieee80211_regdomain
*rd
;
634 /* This is just a dummy holder to help us count */
635 struct ieee80211_reg_rule dummy_rule
;
641 * First we get a count of the rules we'll need, then we actually
642 * build them. This is to so we can malloc() and free() a
643 * regdomain once. The reason we use reg_rules_intersect() here
644 * is it will return -EINVAL if the rule computed makes no sense.
645 * All rules that do check out OK are valid.
648 for (x
= 0; x
< rd1
->n_reg_rules
; x
++) {
649 rule1
= &rd1
->reg_rules
[x
];
650 for (y
= 0; y
< rd2
->n_reg_rules
; y
++) {
651 rule2
= &rd2
->reg_rules
[y
];
652 if (!reg_rules_intersect(rule1
, rule2
, &dummy_rule
))
660 size_of_regd
= sizeof(struct ieee80211_regdomain
) +
661 num_rules
* sizeof(struct ieee80211_reg_rule
);
663 rd
= kzalloc(size_of_regd
, GFP_KERNEL
);
667 for (x
= 0; x
< rd1
->n_reg_rules
&& rule_idx
< num_rules
; x
++) {
668 rule1
= &rd1
->reg_rules
[x
];
669 for (y
= 0; y
< rd2
->n_reg_rules
&& rule_idx
< num_rules
; y
++) {
670 rule2
= &rd2
->reg_rules
[y
];
672 * This time around instead of using the stack lets
673 * write to the target rule directly saving ourselves
676 intersected_rule
= &rd
->reg_rules
[rule_idx
];
677 r
= reg_rules_intersect(rule1
, rule2
, intersected_rule
);
679 * No need to memset here the intersected rule here as
680 * we're not using the stack anymore
688 if (rule_idx
!= num_rules
) {
693 rd
->n_reg_rules
= num_rules
;
701 * XXX: add support for the rest of enum nl80211_reg_rule_flags, we may
702 * want to just have the channel structure use these
704 static u32
map_regdom_flags(u32 rd_flags
)
706 u32 channel_flags
= 0;
707 if (rd_flags
& NL80211_RRF_NO_IR_ALL
)
708 channel_flags
|= IEEE80211_CHAN_NO_IR
;
709 if (rd_flags
& NL80211_RRF_DFS
)
710 channel_flags
|= IEEE80211_CHAN_RADAR
;
711 if (rd_flags
& NL80211_RRF_NO_OFDM
)
712 channel_flags
|= IEEE80211_CHAN_NO_OFDM
;
713 return channel_flags
;
716 static const struct ieee80211_reg_rule
*
717 freq_reg_info_regd(struct wiphy
*wiphy
, u32 center_freq
,
718 const struct ieee80211_regdomain
*regd
)
721 bool band_rule_found
= false;
722 bool bw_fits
= false;
725 return ERR_PTR(-EINVAL
);
727 for (i
= 0; i
< regd
->n_reg_rules
; i
++) {
728 const struct ieee80211_reg_rule
*rr
;
729 const struct ieee80211_freq_range
*fr
= NULL
;
731 rr
= ®d
->reg_rules
[i
];
732 fr
= &rr
->freq_range
;
735 * We only need to know if one frequency rule was
736 * was in center_freq's band, that's enough, so lets
737 * not overwrite it once found
739 if (!band_rule_found
)
740 band_rule_found
= freq_in_rule_band(fr
, center_freq
);
742 bw_fits
= reg_does_bw_fit(fr
, center_freq
, MHZ_TO_KHZ(20));
744 if (band_rule_found
&& bw_fits
)
748 if (!band_rule_found
)
749 return ERR_PTR(-ERANGE
);
751 return ERR_PTR(-EINVAL
);
754 const struct ieee80211_reg_rule
*freq_reg_info(struct wiphy
*wiphy
,
757 const struct ieee80211_regdomain
*regd
;
758 struct regulatory_request
*lr
= get_last_request();
761 * Follow the driver's regulatory domain, if present, unless a country
762 * IE has been processed or a user wants to help complaince further
764 if (lr
->initiator
!= NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
765 lr
->initiator
!= NL80211_REGDOM_SET_BY_USER
&&
767 regd
= get_wiphy_regdom(wiphy
);
769 regd
= get_cfg80211_regdom();
771 return freq_reg_info_regd(wiphy
, center_freq
, regd
);
773 EXPORT_SYMBOL(freq_reg_info
);
775 const char *reg_initiator_name(enum nl80211_reg_initiator initiator
)
778 case NL80211_REGDOM_SET_BY_CORE
:
780 case NL80211_REGDOM_SET_BY_USER
:
782 case NL80211_REGDOM_SET_BY_DRIVER
:
784 case NL80211_REGDOM_SET_BY_COUNTRY_IE
:
791 EXPORT_SYMBOL(reg_initiator_name
);
793 #ifdef CONFIG_CFG80211_REG_DEBUG
794 static void chan_reg_rule_print_dbg(struct ieee80211_channel
*chan
,
795 const struct ieee80211_reg_rule
*reg_rule
)
797 const struct ieee80211_power_rule
*power_rule
;
798 const struct ieee80211_freq_range
*freq_range
;
799 char max_antenna_gain
[32];
801 power_rule
= ®_rule
->power_rule
;
802 freq_range
= ®_rule
->freq_range
;
804 if (!power_rule
->max_antenna_gain
)
805 snprintf(max_antenna_gain
, 32, "N/A");
807 snprintf(max_antenna_gain
, 32, "%d", power_rule
->max_antenna_gain
);
809 REG_DBG_PRINT("Updating information on frequency %d MHz with regulatory rule:\n",
812 REG_DBG_PRINT("%d KHz - %d KHz @ %d KHz), (%s mBi, %d mBm)\n",
813 freq_range
->start_freq_khz
, freq_range
->end_freq_khz
,
814 freq_range
->max_bandwidth_khz
, max_antenna_gain
,
815 power_rule
->max_eirp
);
818 static void chan_reg_rule_print_dbg(struct ieee80211_channel
*chan
,
819 const struct ieee80211_reg_rule
*reg_rule
)
826 * Note that right now we assume the desired channel bandwidth
827 * is always 20 MHz for each individual channel (HT40 uses 20 MHz
828 * per channel, the primary and the extension channel).
830 static void handle_channel(struct wiphy
*wiphy
,
831 enum nl80211_reg_initiator initiator
,
832 struct ieee80211_channel
*chan
)
834 u32 flags
, bw_flags
= 0;
835 const struct ieee80211_reg_rule
*reg_rule
= NULL
;
836 const struct ieee80211_power_rule
*power_rule
= NULL
;
837 const struct ieee80211_freq_range
*freq_range
= NULL
;
838 struct wiphy
*request_wiphy
= NULL
;
839 struct regulatory_request
*lr
= get_last_request();
841 request_wiphy
= wiphy_idx_to_wiphy(lr
->wiphy_idx
);
843 flags
= chan
->orig_flags
;
845 reg_rule
= freq_reg_info(wiphy
, MHZ_TO_KHZ(chan
->center_freq
));
846 if (IS_ERR(reg_rule
)) {
848 * We will disable all channels that do not match our
849 * received regulatory rule unless the hint is coming
850 * from a Country IE and the Country IE had no information
851 * about a band. The IEEE 802.11 spec allows for an AP
852 * to send only a subset of the regulatory rules allowed,
853 * so an AP in the US that only supports 2.4 GHz may only send
854 * a country IE with information for the 2.4 GHz band
855 * while 5 GHz is still supported.
857 if (initiator
== NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
858 PTR_ERR(reg_rule
) == -ERANGE
)
861 if (lr
->initiator
== NL80211_REGDOM_SET_BY_DRIVER
&&
862 request_wiphy
&& request_wiphy
== wiphy
&&
863 request_wiphy
->flags
& WIPHY_FLAG_STRICT_REGULATORY
) {
864 REG_DBG_PRINT("Disabling freq %d MHz for good\n",
866 chan
->orig_flags
|= IEEE80211_CHAN_DISABLED
;
867 chan
->flags
= chan
->orig_flags
;
869 REG_DBG_PRINT("Disabling freq %d MHz\n",
871 chan
->flags
|= IEEE80211_CHAN_DISABLED
;
876 chan_reg_rule_print_dbg(chan
, reg_rule
);
878 power_rule
= ®_rule
->power_rule
;
879 freq_range
= ®_rule
->freq_range
;
881 if (freq_range
->max_bandwidth_khz
< MHZ_TO_KHZ(40))
882 bw_flags
= IEEE80211_CHAN_NO_HT40
;
883 if (freq_range
->max_bandwidth_khz
< MHZ_TO_KHZ(80))
884 bw_flags
|= IEEE80211_CHAN_NO_80MHZ
;
885 if (freq_range
->max_bandwidth_khz
< MHZ_TO_KHZ(160))
886 bw_flags
|= IEEE80211_CHAN_NO_160MHZ
;
888 if (lr
->initiator
== NL80211_REGDOM_SET_BY_DRIVER
&&
889 request_wiphy
&& request_wiphy
== wiphy
&&
890 request_wiphy
->flags
& WIPHY_FLAG_STRICT_REGULATORY
) {
892 * This guarantees the driver's requested regulatory domain
893 * will always be used as a base for further regulatory
896 chan
->flags
= chan
->orig_flags
=
897 map_regdom_flags(reg_rule
->flags
) | bw_flags
;
898 chan
->max_antenna_gain
= chan
->orig_mag
=
899 (int) MBI_TO_DBI(power_rule
->max_antenna_gain
);
900 chan
->max_reg_power
= chan
->max_power
= chan
->orig_mpwr
=
901 (int) MBM_TO_DBM(power_rule
->max_eirp
);
905 chan
->dfs_state
= NL80211_DFS_USABLE
;
906 chan
->dfs_state_entered
= jiffies
;
908 chan
->beacon_found
= false;
909 chan
->flags
= flags
| bw_flags
| map_regdom_flags(reg_rule
->flags
);
910 chan
->max_antenna_gain
=
911 min_t(int, chan
->orig_mag
,
912 MBI_TO_DBI(power_rule
->max_antenna_gain
));
913 chan
->max_reg_power
= (int) MBM_TO_DBM(power_rule
->max_eirp
);
914 if (chan
->orig_mpwr
) {
916 * Devices that have their own custom regulatory domain
917 * but also use WIPHY_FLAG_STRICT_REGULATORY will follow the
918 * passed country IE power settings.
920 if (initiator
== NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
921 wiphy
->flags
& WIPHY_FLAG_CUSTOM_REGULATORY
&&
922 wiphy
->flags
& WIPHY_FLAG_STRICT_REGULATORY
)
923 chan
->max_power
= chan
->max_reg_power
;
925 chan
->max_power
= min(chan
->orig_mpwr
,
926 chan
->max_reg_power
);
928 chan
->max_power
= chan
->max_reg_power
;
931 static void handle_band(struct wiphy
*wiphy
,
932 enum nl80211_reg_initiator initiator
,
933 struct ieee80211_supported_band
*sband
)
940 for (i
= 0; i
< sband
->n_channels
; i
++)
941 handle_channel(wiphy
, initiator
, &sband
->channels
[i
]);
944 static bool reg_request_cell_base(struct regulatory_request
*request
)
946 if (request
->initiator
!= NL80211_REGDOM_SET_BY_USER
)
948 return request
->user_reg_hint_type
== NL80211_USER_REG_HINT_CELL_BASE
;
951 bool reg_last_request_cell_base(void)
953 return reg_request_cell_base(get_last_request());
956 #ifdef CONFIG_CFG80211_CERTIFICATION_ONUS
957 /* Core specific check */
958 static enum reg_request_treatment
959 reg_ignore_cell_hint(struct regulatory_request
*pending_request
)
961 struct regulatory_request
*lr
= get_last_request();
963 if (!reg_num_devs_support_basehint
)
964 return REG_REQ_IGNORE
;
966 if (reg_request_cell_base(lr
) &&
967 !regdom_changes(pending_request
->alpha2
))
968 return REG_REQ_ALREADY_SET
;
973 /* Device specific check */
974 static bool reg_dev_ignore_cell_hint(struct wiphy
*wiphy
)
976 return !(wiphy
->features
& NL80211_FEATURE_CELL_BASE_REG_HINTS
);
979 static int reg_ignore_cell_hint(struct regulatory_request
*pending_request
)
981 return REG_REQ_IGNORE
;
984 static bool reg_dev_ignore_cell_hint(struct wiphy
*wiphy
)
990 static bool wiphy_strict_alpha2_regd(struct wiphy
*wiphy
)
992 if (wiphy
->flags
& WIPHY_FLAG_STRICT_REGULATORY
&&
993 !(wiphy
->flags
& WIPHY_FLAG_CUSTOM_REGULATORY
))
998 static bool ignore_reg_update(struct wiphy
*wiphy
,
999 enum nl80211_reg_initiator initiator
)
1001 struct regulatory_request
*lr
= get_last_request();
1004 REG_DBG_PRINT("Ignoring regulatory request set by %s "
1005 "since last_request is not set\n",
1006 reg_initiator_name(initiator
));
1010 if (initiator
== NL80211_REGDOM_SET_BY_CORE
&&
1011 wiphy
->flags
& WIPHY_FLAG_CUSTOM_REGULATORY
) {
1012 REG_DBG_PRINT("Ignoring regulatory request set by %s "
1013 "since the driver uses its own custom "
1014 "regulatory domain\n",
1015 reg_initiator_name(initiator
));
1020 * wiphy->regd will be set once the device has its own
1021 * desired regulatory domain set
1023 if (wiphy_strict_alpha2_regd(wiphy
) && !wiphy
->regd
&&
1024 initiator
!= NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
1025 !is_world_regdom(lr
->alpha2
)) {
1026 REG_DBG_PRINT("Ignoring regulatory request set by %s "
1027 "since the driver requires its own regulatory "
1028 "domain to be set first\n",
1029 reg_initiator_name(initiator
));
1033 if (reg_request_cell_base(lr
))
1034 return reg_dev_ignore_cell_hint(wiphy
);
1039 static bool reg_is_world_roaming(struct wiphy
*wiphy
)
1041 const struct ieee80211_regdomain
*cr
= get_cfg80211_regdom();
1042 const struct ieee80211_regdomain
*wr
= get_wiphy_regdom(wiphy
);
1043 struct regulatory_request
*lr
= get_last_request();
1045 if (is_world_regdom(cr
->alpha2
) || (wr
&& is_world_regdom(wr
->alpha2
)))
1048 if (lr
&& lr
->initiator
!= NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
1049 wiphy
->flags
& WIPHY_FLAG_CUSTOM_REGULATORY
)
1055 static void handle_reg_beacon(struct wiphy
*wiphy
, unsigned int chan_idx
,
1056 struct reg_beacon
*reg_beacon
)
1058 struct ieee80211_supported_band
*sband
;
1059 struct ieee80211_channel
*chan
;
1060 bool channel_changed
= false;
1061 struct ieee80211_channel chan_before
;
1063 sband
= wiphy
->bands
[reg_beacon
->chan
.band
];
1064 chan
= &sband
->channels
[chan_idx
];
1066 if (likely(chan
->center_freq
!= reg_beacon
->chan
.center_freq
))
1069 if (chan
->beacon_found
)
1072 chan
->beacon_found
= true;
1074 if (!reg_is_world_roaming(wiphy
))
1077 if (wiphy
->flags
& WIPHY_FLAG_DISABLE_BEACON_HINTS
)
1080 chan_before
.center_freq
= chan
->center_freq
;
1081 chan_before
.flags
= chan
->flags
;
1083 if (chan
->flags
& IEEE80211_CHAN_NO_IR
) {
1084 chan
->flags
&= ~IEEE80211_CHAN_NO_IR
;
1085 channel_changed
= true;
1088 if (channel_changed
)
1089 nl80211_send_beacon_hint_event(wiphy
, &chan_before
, chan
);
1093 * Called when a scan on a wiphy finds a beacon on
1096 static void wiphy_update_new_beacon(struct wiphy
*wiphy
,
1097 struct reg_beacon
*reg_beacon
)
1100 struct ieee80211_supported_band
*sband
;
1102 if (!wiphy
->bands
[reg_beacon
->chan
.band
])
1105 sband
= wiphy
->bands
[reg_beacon
->chan
.band
];
1107 for (i
= 0; i
< sband
->n_channels
; i
++)
1108 handle_reg_beacon(wiphy
, i
, reg_beacon
);
1112 * Called upon reg changes or a new wiphy is added
1114 static void wiphy_update_beacon_reg(struct wiphy
*wiphy
)
1117 struct ieee80211_supported_band
*sband
;
1118 struct reg_beacon
*reg_beacon
;
1120 list_for_each_entry(reg_beacon
, ®_beacon_list
, list
) {
1121 if (!wiphy
->bands
[reg_beacon
->chan
.band
])
1123 sband
= wiphy
->bands
[reg_beacon
->chan
.band
];
1124 for (i
= 0; i
< sband
->n_channels
; i
++)
1125 handle_reg_beacon(wiphy
, i
, reg_beacon
);
1129 /* Reap the advantages of previously found beacons */
1130 static void reg_process_beacons(struct wiphy
*wiphy
)
1133 * Means we are just firing up cfg80211, so no beacons would
1134 * have been processed yet.
1138 wiphy_update_beacon_reg(wiphy
);
1141 static bool is_ht40_allowed(struct ieee80211_channel
*chan
)
1145 if (chan
->flags
& IEEE80211_CHAN_DISABLED
)
1147 /* This would happen when regulatory rules disallow HT40 completely */
1148 if ((chan
->flags
& IEEE80211_CHAN_NO_HT40
) == IEEE80211_CHAN_NO_HT40
)
1153 static void reg_process_ht_flags_channel(struct wiphy
*wiphy
,
1154 struct ieee80211_channel
*channel
)
1156 struct ieee80211_supported_band
*sband
= wiphy
->bands
[channel
->band
];
1157 struct ieee80211_channel
*channel_before
= NULL
, *channel_after
= NULL
;
1160 if (!is_ht40_allowed(channel
)) {
1161 channel
->flags
|= IEEE80211_CHAN_NO_HT40
;
1166 * We need to ensure the extension channels exist to
1167 * be able to use HT40- or HT40+, this finds them (or not)
1169 for (i
= 0; i
< sband
->n_channels
; i
++) {
1170 struct ieee80211_channel
*c
= &sband
->channels
[i
];
1172 if (c
->center_freq
== (channel
->center_freq
- 20))
1174 if (c
->center_freq
== (channel
->center_freq
+ 20))
1179 * Please note that this assumes target bandwidth is 20 MHz,
1180 * if that ever changes we also need to change the below logic
1181 * to include that as well.
1183 if (!is_ht40_allowed(channel_before
))
1184 channel
->flags
|= IEEE80211_CHAN_NO_HT40MINUS
;
1186 channel
->flags
&= ~IEEE80211_CHAN_NO_HT40MINUS
;
1188 if (!is_ht40_allowed(channel_after
))
1189 channel
->flags
|= IEEE80211_CHAN_NO_HT40PLUS
;
1191 channel
->flags
&= ~IEEE80211_CHAN_NO_HT40PLUS
;
1194 static void reg_process_ht_flags_band(struct wiphy
*wiphy
,
1195 struct ieee80211_supported_band
*sband
)
1202 for (i
= 0; i
< sband
->n_channels
; i
++)
1203 reg_process_ht_flags_channel(wiphy
, &sband
->channels
[i
]);
1206 static void reg_process_ht_flags(struct wiphy
*wiphy
)
1208 enum ieee80211_band band
;
1213 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++)
1214 reg_process_ht_flags_band(wiphy
, wiphy
->bands
[band
]);
1217 static void wiphy_update_regulatory(struct wiphy
*wiphy
,
1218 enum nl80211_reg_initiator initiator
)
1220 enum ieee80211_band band
;
1221 struct regulatory_request
*lr
= get_last_request();
1223 if (ignore_reg_update(wiphy
, initiator
))
1226 lr
->dfs_region
= get_cfg80211_regdom()->dfs_region
;
1228 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++)
1229 handle_band(wiphy
, initiator
, wiphy
->bands
[band
]);
1231 reg_process_beacons(wiphy
);
1232 reg_process_ht_flags(wiphy
);
1234 if (wiphy
->reg_notifier
)
1235 wiphy
->reg_notifier(wiphy
, lr
);
1238 static void update_all_wiphy_regulatory(enum nl80211_reg_initiator initiator
)
1240 struct cfg80211_registered_device
*rdev
;
1241 struct wiphy
*wiphy
;
1245 list_for_each_entry(rdev
, &cfg80211_rdev_list
, list
) {
1246 wiphy
= &rdev
->wiphy
;
1247 wiphy_update_regulatory(wiphy
, initiator
);
1249 * Regulatory updates set by CORE are ignored for custom
1250 * regulatory cards. Let us notify the changes to the driver,
1251 * as some drivers used this to restore its orig_* reg domain.
1253 if (initiator
== NL80211_REGDOM_SET_BY_CORE
&&
1254 wiphy
->flags
& WIPHY_FLAG_CUSTOM_REGULATORY
&&
1255 wiphy
->reg_notifier
)
1256 wiphy
->reg_notifier(wiphy
, get_last_request());
1260 static void handle_channel_custom(struct wiphy
*wiphy
,
1261 struct ieee80211_channel
*chan
,
1262 const struct ieee80211_regdomain
*regd
)
1265 const struct ieee80211_reg_rule
*reg_rule
= NULL
;
1266 const struct ieee80211_power_rule
*power_rule
= NULL
;
1267 const struct ieee80211_freq_range
*freq_range
= NULL
;
1269 reg_rule
= freq_reg_info_regd(wiphy
, MHZ_TO_KHZ(chan
->center_freq
),
1272 if (IS_ERR(reg_rule
)) {
1273 REG_DBG_PRINT("Disabling freq %d MHz as custom regd has no rule that fits it\n",
1275 chan
->orig_flags
|= IEEE80211_CHAN_DISABLED
;
1276 chan
->flags
= chan
->orig_flags
;
1280 chan_reg_rule_print_dbg(chan
, reg_rule
);
1282 power_rule
= ®_rule
->power_rule
;
1283 freq_range
= ®_rule
->freq_range
;
1285 if (freq_range
->max_bandwidth_khz
< MHZ_TO_KHZ(40))
1286 bw_flags
= IEEE80211_CHAN_NO_HT40
;
1287 if (freq_range
->max_bandwidth_khz
< MHZ_TO_KHZ(80))
1288 bw_flags
|= IEEE80211_CHAN_NO_80MHZ
;
1289 if (freq_range
->max_bandwidth_khz
< MHZ_TO_KHZ(160))
1290 bw_flags
|= IEEE80211_CHAN_NO_160MHZ
;
1292 chan
->flags
|= map_regdom_flags(reg_rule
->flags
) | bw_flags
;
1293 chan
->max_antenna_gain
= (int) MBI_TO_DBI(power_rule
->max_antenna_gain
);
1294 chan
->max_reg_power
= chan
->max_power
=
1295 (int) MBM_TO_DBM(power_rule
->max_eirp
);
1298 static void handle_band_custom(struct wiphy
*wiphy
,
1299 struct ieee80211_supported_band
*sband
,
1300 const struct ieee80211_regdomain
*regd
)
1307 for (i
= 0; i
< sband
->n_channels
; i
++)
1308 handle_channel_custom(wiphy
, &sband
->channels
[i
], regd
);
1311 /* Used by drivers prior to wiphy registration */
1312 void wiphy_apply_custom_regulatory(struct wiphy
*wiphy
,
1313 const struct ieee80211_regdomain
*regd
)
1315 enum ieee80211_band band
;
1316 unsigned int bands_set
= 0;
1318 WARN(!(wiphy
->flags
& WIPHY_FLAG_CUSTOM_REGULATORY
),
1319 "wiphy should have WIPHY_FLAG_CUSTOM_REGULATORY\n");
1320 wiphy
->flags
|= WIPHY_FLAG_CUSTOM_REGULATORY
;
1322 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++) {
1323 if (!wiphy
->bands
[band
])
1325 handle_band_custom(wiphy
, wiphy
->bands
[band
], regd
);
1330 * no point in calling this if it won't have any effect
1331 * on your device's supported bands.
1333 WARN_ON(!bands_set
);
1335 EXPORT_SYMBOL(wiphy_apply_custom_regulatory
);
1337 static void reg_set_request_processed(void)
1339 bool need_more_processing
= false;
1340 struct regulatory_request
*lr
= get_last_request();
1342 lr
->processed
= true;
1344 spin_lock(®_requests_lock
);
1345 if (!list_empty(®_requests_list
))
1346 need_more_processing
= true;
1347 spin_unlock(®_requests_lock
);
1349 if (lr
->initiator
== NL80211_REGDOM_SET_BY_USER
)
1350 cancel_delayed_work(®_timeout
);
1352 if (need_more_processing
)
1353 schedule_work(®_work
);
1357 * reg_process_hint_core - process core regulatory requests
1358 * @pending_request: a pending core regulatory request
1360 * The wireless subsystem can use this function to process
1361 * a regulatory request issued by the regulatory core.
1363 * Returns one of the different reg request treatment values.
1365 static enum reg_request_treatment
1366 reg_process_hint_core(struct regulatory_request
*core_request
)
1369 core_request
->intersect
= false;
1370 core_request
->processed
= false;
1372 reg_update_last_request(core_request
);
1374 if (call_crda(core_request
->alpha2
))
1375 return REG_REQ_IGNORE
;
1379 static enum reg_request_treatment
1380 __reg_process_hint_user(struct regulatory_request
*user_request
)
1382 struct regulatory_request
*lr
= get_last_request();
1384 if (reg_request_cell_base(user_request
))
1385 return reg_ignore_cell_hint(user_request
);
1387 if (reg_request_cell_base(lr
))
1388 return REG_REQ_IGNORE
;
1390 if (lr
->initiator
== NL80211_REGDOM_SET_BY_COUNTRY_IE
)
1391 return REG_REQ_INTERSECT
;
1393 * If the user knows better the user should set the regdom
1394 * to their country before the IE is picked up
1396 if (lr
->initiator
== NL80211_REGDOM_SET_BY_USER
&&
1398 return REG_REQ_IGNORE
;
1400 * Process user requests only after previous user/driver/core
1401 * requests have been processed
1403 if ((lr
->initiator
== NL80211_REGDOM_SET_BY_CORE
||
1404 lr
->initiator
== NL80211_REGDOM_SET_BY_DRIVER
||
1405 lr
->initiator
== NL80211_REGDOM_SET_BY_USER
) &&
1406 regdom_changes(lr
->alpha2
))
1407 return REG_REQ_IGNORE
;
1409 if (!regdom_changes(user_request
->alpha2
))
1410 return REG_REQ_ALREADY_SET
;
1416 * reg_process_hint_user - process user regulatory requests
1417 * @user_request: a pending user regulatory request
1419 * The wireless subsystem can use this function to process
1420 * a regulatory request initiated by userspace.
1422 * Returns one of the different reg request treatment values.
1424 static enum reg_request_treatment
1425 reg_process_hint_user(struct regulatory_request
*user_request
)
1427 enum reg_request_treatment treatment
;
1429 treatment
= __reg_process_hint_user(user_request
);
1430 if (treatment
== REG_REQ_IGNORE
||
1431 treatment
== REG_REQ_ALREADY_SET
) {
1432 kfree(user_request
);
1436 user_request
->intersect
= treatment
== REG_REQ_INTERSECT
;
1437 user_request
->processed
= false;
1439 reg_update_last_request(user_request
);
1441 user_alpha2
[0] = user_request
->alpha2
[0];
1442 user_alpha2
[1] = user_request
->alpha2
[1];
1444 if (call_crda(user_request
->alpha2
))
1445 return REG_REQ_IGNORE
;
1449 static enum reg_request_treatment
1450 __reg_process_hint_driver(struct regulatory_request
*driver_request
)
1452 struct regulatory_request
*lr
= get_last_request();
1454 if (lr
->initiator
== NL80211_REGDOM_SET_BY_CORE
) {
1455 if (regdom_changes(driver_request
->alpha2
))
1457 return REG_REQ_ALREADY_SET
;
1461 * This would happen if you unplug and plug your card
1462 * back in or if you add a new device for which the previously
1463 * loaded card also agrees on the regulatory domain.
1465 if (lr
->initiator
== NL80211_REGDOM_SET_BY_DRIVER
&&
1466 !regdom_changes(driver_request
->alpha2
))
1467 return REG_REQ_ALREADY_SET
;
1469 return REG_REQ_INTERSECT
;
1473 * reg_process_hint_driver - process driver regulatory requests
1474 * @driver_request: a pending driver regulatory request
1476 * The wireless subsystem can use this function to process
1477 * a regulatory request issued by an 802.11 driver.
1479 * Returns one of the different reg request treatment values.
1481 static enum reg_request_treatment
1482 reg_process_hint_driver(struct wiphy
*wiphy
,
1483 struct regulatory_request
*driver_request
)
1485 const struct ieee80211_regdomain
*regd
;
1486 enum reg_request_treatment treatment
;
1488 treatment
= __reg_process_hint_driver(driver_request
);
1490 switch (treatment
) {
1493 case REG_REQ_IGNORE
:
1494 kfree(driver_request
);
1496 case REG_REQ_INTERSECT
:
1498 case REG_REQ_ALREADY_SET
:
1499 regd
= reg_copy_regd(get_cfg80211_regdom());
1501 kfree(driver_request
);
1502 return REG_REQ_IGNORE
;
1504 rcu_assign_pointer(wiphy
->regd
, regd
);
1508 driver_request
->intersect
= treatment
== REG_REQ_INTERSECT
;
1509 driver_request
->processed
= false;
1511 reg_update_last_request(driver_request
);
1514 * Since CRDA will not be called in this case as we already
1515 * have applied the requested regulatory domain before we just
1516 * inform userspace we have processed the request
1518 if (treatment
== REG_REQ_ALREADY_SET
) {
1519 nl80211_send_reg_change_event(driver_request
);
1520 reg_set_request_processed();
1524 if (call_crda(driver_request
->alpha2
))
1525 return REG_REQ_IGNORE
;
1529 static enum reg_request_treatment
1530 __reg_process_hint_country_ie(struct wiphy
*wiphy
,
1531 struct regulatory_request
*country_ie_request
)
1533 struct wiphy
*last_wiphy
= NULL
;
1534 struct regulatory_request
*lr
= get_last_request();
1536 if (reg_request_cell_base(lr
)) {
1537 /* Trust a Cell base station over the AP's country IE */
1538 if (regdom_changes(country_ie_request
->alpha2
))
1539 return REG_REQ_IGNORE
;
1540 return REG_REQ_ALREADY_SET
;
1543 if (unlikely(!is_an_alpha2(country_ie_request
->alpha2
)))
1546 if (lr
->initiator
!= NL80211_REGDOM_SET_BY_COUNTRY_IE
)
1549 last_wiphy
= wiphy_idx_to_wiphy(lr
->wiphy_idx
);
1551 if (last_wiphy
!= wiphy
) {
1553 * Two cards with two APs claiming different
1554 * Country IE alpha2s. We could
1555 * intersect them, but that seems unlikely
1556 * to be correct. Reject second one for now.
1558 if (regdom_changes(country_ie_request
->alpha2
))
1559 return REG_REQ_IGNORE
;
1560 return REG_REQ_ALREADY_SET
;
1563 * Two consecutive Country IE hints on the same wiphy.
1564 * This should be picked up early by the driver/stack
1566 if (WARN_ON(regdom_changes(country_ie_request
->alpha2
)))
1568 return REG_REQ_ALREADY_SET
;
1572 * reg_process_hint_country_ie - process regulatory requests from country IEs
1573 * @country_ie_request: a regulatory request from a country IE
1575 * The wireless subsystem can use this function to process
1576 * a regulatory request issued by a country Information Element.
1578 * Returns one of the different reg request treatment values.
1580 static enum reg_request_treatment
1581 reg_process_hint_country_ie(struct wiphy
*wiphy
,
1582 struct regulatory_request
*country_ie_request
)
1584 enum reg_request_treatment treatment
;
1586 treatment
= __reg_process_hint_country_ie(wiphy
, country_ie_request
);
1588 switch (treatment
) {
1591 case REG_REQ_IGNORE
:
1593 case REG_REQ_ALREADY_SET
:
1594 kfree(country_ie_request
);
1596 case REG_REQ_INTERSECT
:
1597 kfree(country_ie_request
);
1599 * This doesn't happen yet, not sure we
1600 * ever want to support it for this case.
1602 WARN_ONCE(1, "Unexpected intersection for country IEs");
1603 return REG_REQ_IGNORE
;
1606 country_ie_request
->intersect
= false;
1607 country_ie_request
->processed
= false;
1609 reg_update_last_request(country_ie_request
);
1611 if (call_crda(country_ie_request
->alpha2
))
1612 return REG_REQ_IGNORE
;
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 update_world_regdomain(rd
);
2207 if (!is_alpha2_set(rd
->alpha2
) && !is_an_alpha2(rd
->alpha2
) &&
2208 !is_unknown_alpha2(rd
->alpha2
))
2212 * Lets only bother proceeding on the same alpha2 if the current
2213 * rd is non static (it means CRDA was present and was used last)
2214 * and the pending request came in from a country IE
2216 if (lr
->initiator
!= NL80211_REGDOM_SET_BY_COUNTRY_IE
) {
2218 * If someone else asked us to change the rd lets only bother
2219 * checking if the alpha2 changes if CRDA was already called
2221 if (!regdom_changes(rd
->alpha2
))
2226 * Now lets set the regulatory domain, update all driver channels
2227 * and finally inform them of what we have done, in case they want
2228 * to review or adjust their own settings based on their own
2229 * internal EEPROM data
2232 if (!is_valid_rd(rd
)) {
2233 pr_err("Invalid regulatory domain detected:\n");
2234 print_regdomain_info(rd
);
2238 request_wiphy
= wiphy_idx_to_wiphy(lr
->wiphy_idx
);
2239 if (!request_wiphy
&&
2240 (lr
->initiator
== NL80211_REGDOM_SET_BY_DRIVER
||
2241 lr
->initiator
== NL80211_REGDOM_SET_BY_COUNTRY_IE
)) {
2242 schedule_delayed_work(®_timeout
, 0);
2246 if (!lr
->intersect
) {
2247 if (lr
->initiator
!= NL80211_REGDOM_SET_BY_DRIVER
) {
2248 reset_regdomains(false, rd
);
2253 * For a driver hint, lets copy the regulatory domain the
2254 * driver wanted to the wiphy to deal with conflicts
2258 * Userspace could have sent two replies with only
2259 * one kernel request.
2261 if (request_wiphy
->regd
)
2264 regd
= reg_copy_regd(rd
);
2266 return PTR_ERR(regd
);
2268 rcu_assign_pointer(request_wiphy
->regd
, regd
);
2269 reset_regdomains(false, rd
);
2273 /* Intersection requires a bit more work */
2275 if (lr
->initiator
!= NL80211_REGDOM_SET_BY_COUNTRY_IE
) {
2276 intersected_rd
= regdom_intersect(rd
, get_cfg80211_regdom());
2277 if (!intersected_rd
)
2281 * We can trash what CRDA provided now.
2282 * However if a driver requested this specific regulatory
2283 * domain we keep it for its private use
2285 if (lr
->initiator
== NL80211_REGDOM_SET_BY_DRIVER
) {
2286 const struct ieee80211_regdomain
*tmp
;
2288 tmp
= get_wiphy_regdom(request_wiphy
);
2289 rcu_assign_pointer(request_wiphy
->regd
, rd
);
2290 rcu_free_regdom(tmp
);
2297 reset_regdomains(false, intersected_rd
);
2307 * Use this call to set the current regulatory domain. Conflicts with
2308 * multiple drivers can be ironed out later. Caller must've already
2309 * kmalloc'd the rd structure.
2311 int set_regdom(const struct ieee80211_regdomain
*rd
)
2313 struct regulatory_request
*lr
;
2316 lr
= get_last_request();
2318 /* Note that this doesn't update the wiphys, this is done below */
2319 r
= __set_regdom(rd
);
2322 reg_set_request_processed();
2328 /* This would make this whole thing pointless */
2329 if (WARN_ON(!lr
->intersect
&& rd
!= get_cfg80211_regdom()))
2332 /* update all wiphys now with the new established regulatory domain */
2333 update_all_wiphy_regulatory(lr
->initiator
);
2335 print_regdomain(get_cfg80211_regdom());
2337 nl80211_send_reg_change_event(lr
);
2339 reg_set_request_processed();
2344 int reg_device_uevent(struct device
*dev
, struct kobj_uevent_env
*env
)
2346 struct regulatory_request
*lr
;
2351 lr
= get_last_request();
2352 if (lr
&& !lr
->processed
) {
2353 memcpy(alpha2
, lr
->alpha2
, 2);
2359 return add_uevent_var(env
, "COUNTRY=%c%c",
2360 alpha2
[0], alpha2
[1]);
2364 void wiphy_regulatory_register(struct wiphy
*wiphy
)
2366 struct regulatory_request
*lr
;
2368 if (!reg_dev_ignore_cell_hint(wiphy
))
2369 reg_num_devs_support_basehint
++;
2371 lr
= get_last_request();
2372 wiphy_update_regulatory(wiphy
, lr
->initiator
);
2375 void wiphy_regulatory_deregister(struct wiphy
*wiphy
)
2377 struct wiphy
*request_wiphy
= NULL
;
2378 struct regulatory_request
*lr
;
2380 lr
= get_last_request();
2382 if (!reg_dev_ignore_cell_hint(wiphy
))
2383 reg_num_devs_support_basehint
--;
2385 rcu_free_regdom(get_wiphy_regdom(wiphy
));
2386 rcu_assign_pointer(wiphy
->regd
, NULL
);
2389 request_wiphy
= wiphy_idx_to_wiphy(lr
->wiphy_idx
);
2391 if (!request_wiphy
|| request_wiphy
!= wiphy
)
2394 lr
->wiphy_idx
= WIPHY_IDX_INVALID
;
2395 lr
->country_ie_env
= ENVIRON_ANY
;
2398 static void reg_timeout_work(struct work_struct
*work
)
2400 REG_DBG_PRINT("Timeout while waiting for CRDA to reply, restoring regulatory settings\n");
2402 restore_regulatory_settings(true);
2406 int __init
regulatory_init(void)
2410 reg_pdev
= platform_device_register_simple("regulatory", 0, NULL
, 0);
2411 if (IS_ERR(reg_pdev
))
2412 return PTR_ERR(reg_pdev
);
2414 reg_pdev
->dev
.type
= ®_device_type
;
2416 spin_lock_init(®_requests_lock
);
2417 spin_lock_init(®_pending_beacons_lock
);
2419 reg_regdb_size_check();
2421 rcu_assign_pointer(cfg80211_regdomain
, cfg80211_world_regdom
);
2423 user_alpha2
[0] = '9';
2424 user_alpha2
[1] = '7';
2426 /* We always try to get an update for the static regdomain */
2427 err
= regulatory_hint_core(cfg80211_world_regdom
->alpha2
);
2432 * N.B. kobject_uevent_env() can fail mainly for when we're out
2433 * memory which is handled and propagated appropriately above
2434 * but it can also fail during a netlink_broadcast() or during
2435 * early boot for call_usermodehelper(). For now treat these
2436 * errors as non-fatal.
2438 pr_err("kobject_uevent_env() was unable to call CRDA during init\n");
2442 * Finally, if the user set the module parameter treat it
2445 if (!is_world_regdom(ieee80211_regdom
))
2446 regulatory_hint_user(ieee80211_regdom
,
2447 NL80211_USER_REG_HINT_USER
);
2452 void regulatory_exit(void)
2454 struct regulatory_request
*reg_request
, *tmp
;
2455 struct reg_beacon
*reg_beacon
, *btmp
;
2457 cancel_work_sync(®_work
);
2458 cancel_delayed_work_sync(®_timeout
);
2460 /* Lock to suppress warnings */
2462 reset_regdomains(true, NULL
);
2465 dev_set_uevent_suppress(®_pdev
->dev
, true);
2467 platform_device_unregister(reg_pdev
);
2469 list_for_each_entry_safe(reg_beacon
, btmp
, ®_pending_beacons
, list
) {
2470 list_del(®_beacon
->list
);
2474 list_for_each_entry_safe(reg_beacon
, btmp
, ®_beacon_list
, list
) {
2475 list_del(®_beacon
->list
);
2479 list_for_each_entry_safe(reg_request
, tmp
, ®_requests_list
, list
) {
2480 list_del(®_request
->list
);