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 reset_regdomains(bool full_reset
,
206 const struct ieee80211_regdomain
*new_regdom
)
208 const struct ieee80211_regdomain
*r
;
209 struct regulatory_request
*lr
;
213 r
= get_cfg80211_regdom();
215 /* avoid freeing static information or freeing something twice */
216 if (r
== cfg80211_world_regdom
)
218 if (cfg80211_world_regdom
== &world_regdom
)
219 cfg80211_world_regdom
= NULL
;
220 if (r
== &world_regdom
)
224 rcu_free_regdom(cfg80211_world_regdom
);
226 cfg80211_world_regdom
= &world_regdom
;
227 rcu_assign_pointer(cfg80211_regdomain
, new_regdom
);
232 lr
= get_last_request();
233 if (lr
!= &core_request_world
&& lr
)
234 kfree_rcu(lr
, rcu_head
);
235 rcu_assign_pointer(last_request
, &core_request_world
);
239 * Dynamic world regulatory domain requested by the wireless
240 * core upon initialization
242 static void update_world_regdomain(const struct ieee80211_regdomain
*rd
)
244 struct regulatory_request
*lr
;
246 lr
= get_last_request();
250 reset_regdomains(false, rd
);
252 cfg80211_world_regdom
= rd
;
255 bool is_world_regdom(const char *alpha2
)
259 return alpha2
[0] == '0' && alpha2
[1] == '0';
262 static bool is_alpha2_set(const char *alpha2
)
266 return alpha2
[0] && alpha2
[1];
269 static bool is_unknown_alpha2(const char *alpha2
)
274 * Special case where regulatory domain was built by driver
275 * but a specific alpha2 cannot be determined
277 return alpha2
[0] == '9' && alpha2
[1] == '9';
280 static bool is_intersected_alpha2(const char *alpha2
)
285 * Special case where regulatory domain is the
286 * result of an intersection between two regulatory domain
289 return alpha2
[0] == '9' && alpha2
[1] == '8';
292 static bool is_an_alpha2(const char *alpha2
)
296 return isalpha(alpha2
[0]) && isalpha(alpha2
[1]);
299 static bool alpha2_equal(const char *alpha2_x
, const char *alpha2_y
)
301 if (!alpha2_x
|| !alpha2_y
)
303 return alpha2_x
[0] == alpha2_y
[0] && alpha2_x
[1] == alpha2_y
[1];
306 static bool regdom_changes(const char *alpha2
)
308 const struct ieee80211_regdomain
*r
= get_cfg80211_regdom();
312 return !alpha2_equal(r
->alpha2
, alpha2
);
316 * The NL80211_REGDOM_SET_BY_USER regdom alpha2 is cached, this lets
317 * you know if a valid regulatory hint with NL80211_REGDOM_SET_BY_USER
318 * has ever been issued.
320 static bool is_user_regdom_saved(void)
322 if (user_alpha2
[0] == '9' && user_alpha2
[1] == '7')
325 /* This would indicate a mistake on the design */
326 if (WARN(!is_world_regdom(user_alpha2
) && !is_an_alpha2(user_alpha2
),
327 "Unexpected user alpha2: %c%c\n",
328 user_alpha2
[0], user_alpha2
[1]))
334 static const struct ieee80211_regdomain
*
335 reg_copy_regd(const struct ieee80211_regdomain
*src_regd
)
337 struct ieee80211_regdomain
*regd
;
342 sizeof(struct ieee80211_regdomain
) +
343 src_regd
->n_reg_rules
* sizeof(struct ieee80211_reg_rule
);
345 regd
= kzalloc(size_of_regd
, GFP_KERNEL
);
347 return ERR_PTR(-ENOMEM
);
349 memcpy(regd
, src_regd
, sizeof(struct ieee80211_regdomain
));
351 for (i
= 0; i
< src_regd
->n_reg_rules
; i
++)
352 memcpy(®d
->reg_rules
[i
], &src_regd
->reg_rules
[i
],
353 sizeof(struct ieee80211_reg_rule
));
358 #ifdef CONFIG_CFG80211_INTERNAL_REGDB
359 struct reg_regdb_search_request
{
361 struct list_head list
;
364 static LIST_HEAD(reg_regdb_search_list
);
365 static DEFINE_MUTEX(reg_regdb_search_mutex
);
367 static void reg_regdb_search(struct work_struct
*work
)
369 struct reg_regdb_search_request
*request
;
370 const struct ieee80211_regdomain
*curdom
, *regdom
= NULL
;
375 mutex_lock(®_regdb_search_mutex
);
376 while (!list_empty(®_regdb_search_list
)) {
377 request
= list_first_entry(®_regdb_search_list
,
378 struct reg_regdb_search_request
,
380 list_del(&request
->list
);
382 for (i
= 0; i
< reg_regdb_size
; i
++) {
383 curdom
= reg_regdb
[i
];
385 if (alpha2_equal(request
->alpha2
, curdom
->alpha2
)) {
386 regdom
= reg_copy_regd(curdom
);
393 mutex_unlock(®_regdb_search_mutex
);
395 if (!IS_ERR_OR_NULL(regdom
))
401 static DECLARE_WORK(reg_regdb_work
, reg_regdb_search
);
403 static void reg_regdb_query(const char *alpha2
)
405 struct reg_regdb_search_request
*request
;
410 request
= kzalloc(sizeof(struct reg_regdb_search_request
), GFP_KERNEL
);
414 memcpy(request
->alpha2
, alpha2
, 2);
416 mutex_lock(®_regdb_search_mutex
);
417 list_add_tail(&request
->list
, ®_regdb_search_list
);
418 mutex_unlock(®_regdb_search_mutex
);
420 schedule_work(®_regdb_work
);
423 /* Feel free to add any other sanity checks here */
424 static void reg_regdb_size_check(void)
426 /* We should ideally BUILD_BUG_ON() but then random builds would fail */
427 WARN_ONCE(!reg_regdb_size
, "db.txt is empty, you should update it...");
430 static inline void reg_regdb_size_check(void) {}
431 static inline void reg_regdb_query(const char *alpha2
) {}
432 #endif /* CONFIG_CFG80211_INTERNAL_REGDB */
435 * This lets us keep regulatory code which is updated on a regulatory
436 * basis in userspace. Country information is filled in by
439 static int call_crda(const char *alpha2
)
441 if (!is_world_regdom((char *) alpha2
))
442 pr_info("Calling CRDA for country: %c%c\n",
443 alpha2
[0], alpha2
[1]);
445 pr_info("Calling CRDA to update world regulatory domain\n");
447 /* query internal regulatory database (if it exists) */
448 reg_regdb_query(alpha2
);
450 return kobject_uevent(®_pdev
->dev
.kobj
, KOBJ_CHANGE
);
453 bool reg_is_valid_request(const char *alpha2
)
455 struct regulatory_request
*lr
= get_last_request();
457 if (!lr
|| lr
->processed
)
460 return alpha2_equal(lr
->alpha2
, alpha2
);
463 /* Sanity check on a regulatory rule */
464 static bool is_valid_reg_rule(const struct ieee80211_reg_rule
*rule
)
466 const struct ieee80211_freq_range
*freq_range
= &rule
->freq_range
;
469 if (freq_range
->start_freq_khz
<= 0 || freq_range
->end_freq_khz
<= 0)
472 if (freq_range
->start_freq_khz
> freq_range
->end_freq_khz
)
475 freq_diff
= freq_range
->end_freq_khz
- freq_range
->start_freq_khz
;
477 if (freq_range
->end_freq_khz
<= freq_range
->start_freq_khz
||
478 freq_range
->max_bandwidth_khz
> freq_diff
)
484 static bool is_valid_rd(const struct ieee80211_regdomain
*rd
)
486 const struct ieee80211_reg_rule
*reg_rule
= NULL
;
489 if (!rd
->n_reg_rules
)
492 if (WARN_ON(rd
->n_reg_rules
> NL80211_MAX_SUPP_REG_RULES
))
495 for (i
= 0; i
< rd
->n_reg_rules
; i
++) {
496 reg_rule
= &rd
->reg_rules
[i
];
497 if (!is_valid_reg_rule(reg_rule
))
504 static bool reg_does_bw_fit(const struct ieee80211_freq_range
*freq_range
,
505 u32 center_freq_khz
, u32 bw_khz
)
507 u32 start_freq_khz
, end_freq_khz
;
509 start_freq_khz
= center_freq_khz
- (bw_khz
/2);
510 end_freq_khz
= center_freq_khz
+ (bw_khz
/2);
512 if (start_freq_khz
>= freq_range
->start_freq_khz
&&
513 end_freq_khz
<= freq_range
->end_freq_khz
)
520 * freq_in_rule_band - tells us if a frequency is in a frequency band
521 * @freq_range: frequency rule we want to query
522 * @freq_khz: frequency we are inquiring about
524 * This lets us know if a specific frequency rule is or is not relevant to
525 * a specific frequency's band. Bands are device specific and artificial
526 * definitions (the "2.4 GHz band", the "5 GHz band" and the "60GHz band"),
527 * however it is safe for now to assume that a frequency rule should not be
528 * part of a frequency's band if the start freq or end freq are off by more
529 * than 2 GHz for the 2.4 and 5 GHz bands, and by more than 10 GHz for the
531 * This resolution can be lowered and should be considered as we add
532 * regulatory rule support for other "bands".
534 static bool freq_in_rule_band(const struct ieee80211_freq_range
*freq_range
,
537 #define ONE_GHZ_IN_KHZ 1000000
539 * From 802.11ad: directional multi-gigabit (DMG):
540 * Pertaining to operation in a frequency band containing a channel
541 * with the Channel starting frequency above 45 GHz.
543 u32 limit
= freq_khz
> 45 * ONE_GHZ_IN_KHZ
?
544 10 * ONE_GHZ_IN_KHZ
: 2 * ONE_GHZ_IN_KHZ
;
545 if (abs(freq_khz
- freq_range
->start_freq_khz
) <= limit
)
547 if (abs(freq_khz
- freq_range
->end_freq_khz
) <= limit
)
550 #undef ONE_GHZ_IN_KHZ
554 * Helper for regdom_intersect(), this does the real
555 * mathematical intersection fun
557 static int reg_rules_intersect(const struct ieee80211_reg_rule
*rule1
,
558 const struct ieee80211_reg_rule
*rule2
,
559 struct ieee80211_reg_rule
*intersected_rule
)
561 const struct ieee80211_freq_range
*freq_range1
, *freq_range2
;
562 struct ieee80211_freq_range
*freq_range
;
563 const struct ieee80211_power_rule
*power_rule1
, *power_rule2
;
564 struct ieee80211_power_rule
*power_rule
;
567 freq_range1
= &rule1
->freq_range
;
568 freq_range2
= &rule2
->freq_range
;
569 freq_range
= &intersected_rule
->freq_range
;
571 power_rule1
= &rule1
->power_rule
;
572 power_rule2
= &rule2
->power_rule
;
573 power_rule
= &intersected_rule
->power_rule
;
575 freq_range
->start_freq_khz
= max(freq_range1
->start_freq_khz
,
576 freq_range2
->start_freq_khz
);
577 freq_range
->end_freq_khz
= min(freq_range1
->end_freq_khz
,
578 freq_range2
->end_freq_khz
);
579 freq_range
->max_bandwidth_khz
= min(freq_range1
->max_bandwidth_khz
,
580 freq_range2
->max_bandwidth_khz
);
582 freq_diff
= freq_range
->end_freq_khz
- freq_range
->start_freq_khz
;
583 if (freq_range
->max_bandwidth_khz
> freq_diff
)
584 freq_range
->max_bandwidth_khz
= freq_diff
;
586 power_rule
->max_eirp
= min(power_rule1
->max_eirp
,
587 power_rule2
->max_eirp
);
588 power_rule
->max_antenna_gain
= min(power_rule1
->max_antenna_gain
,
589 power_rule2
->max_antenna_gain
);
591 intersected_rule
->flags
= rule1
->flags
| rule2
->flags
;
593 if (!is_valid_reg_rule(intersected_rule
))
600 * regdom_intersect - do the intersection between two regulatory domains
601 * @rd1: first regulatory domain
602 * @rd2: second regulatory domain
604 * Use this function to get the intersection between two regulatory domains.
605 * Once completed we will mark the alpha2 for the rd as intersected, "98",
606 * as no one single alpha2 can represent this regulatory domain.
608 * Returns a pointer to the regulatory domain structure which will hold the
609 * resulting intersection of rules between rd1 and rd2. We will
610 * kzalloc() this structure for you.
612 static struct ieee80211_regdomain
*
613 regdom_intersect(const struct ieee80211_regdomain
*rd1
,
614 const struct ieee80211_regdomain
*rd2
)
618 unsigned int num_rules
= 0, rule_idx
= 0;
619 const struct ieee80211_reg_rule
*rule1
, *rule2
;
620 struct ieee80211_reg_rule
*intersected_rule
;
621 struct ieee80211_regdomain
*rd
;
622 /* This is just a dummy holder to help us count */
623 struct ieee80211_reg_rule dummy_rule
;
629 * First we get a count of the rules we'll need, then we actually
630 * build them. This is to so we can malloc() and free() a
631 * regdomain once. The reason we use reg_rules_intersect() here
632 * is it will return -EINVAL if the rule computed makes no sense.
633 * All rules that do check out OK are valid.
636 for (x
= 0; x
< rd1
->n_reg_rules
; x
++) {
637 rule1
= &rd1
->reg_rules
[x
];
638 for (y
= 0; y
< rd2
->n_reg_rules
; y
++) {
639 rule2
= &rd2
->reg_rules
[y
];
640 if (!reg_rules_intersect(rule1
, rule2
, &dummy_rule
))
648 size_of_regd
= sizeof(struct ieee80211_regdomain
) +
649 num_rules
* sizeof(struct ieee80211_reg_rule
);
651 rd
= kzalloc(size_of_regd
, GFP_KERNEL
);
655 for (x
= 0; x
< rd1
->n_reg_rules
&& rule_idx
< num_rules
; x
++) {
656 rule1
= &rd1
->reg_rules
[x
];
657 for (y
= 0; y
< rd2
->n_reg_rules
&& rule_idx
< num_rules
; y
++) {
658 rule2
= &rd2
->reg_rules
[y
];
660 * This time around instead of using the stack lets
661 * write to the target rule directly saving ourselves
664 intersected_rule
= &rd
->reg_rules
[rule_idx
];
665 r
= reg_rules_intersect(rule1
, rule2
, intersected_rule
);
667 * No need to memset here the intersected rule here as
668 * we're not using the stack anymore
676 if (rule_idx
!= num_rules
) {
681 rd
->n_reg_rules
= num_rules
;
689 * XXX: add support for the rest of enum nl80211_reg_rule_flags, we may
690 * want to just have the channel structure use these
692 static u32
map_regdom_flags(u32 rd_flags
)
694 u32 channel_flags
= 0;
695 if (rd_flags
& NL80211_RRF_NO_IR_ALL
)
696 channel_flags
|= IEEE80211_CHAN_NO_IR
;
697 if (rd_flags
& NL80211_RRF_DFS
)
698 channel_flags
|= IEEE80211_CHAN_RADAR
;
699 if (rd_flags
& NL80211_RRF_NO_OFDM
)
700 channel_flags
|= IEEE80211_CHAN_NO_OFDM
;
701 return channel_flags
;
704 static const struct ieee80211_reg_rule
*
705 freq_reg_info_regd(struct wiphy
*wiphy
, u32 center_freq
,
706 const struct ieee80211_regdomain
*regd
)
709 bool band_rule_found
= false;
710 bool bw_fits
= false;
713 return ERR_PTR(-EINVAL
);
715 for (i
= 0; i
< regd
->n_reg_rules
; i
++) {
716 const struct ieee80211_reg_rule
*rr
;
717 const struct ieee80211_freq_range
*fr
= NULL
;
719 rr
= ®d
->reg_rules
[i
];
720 fr
= &rr
->freq_range
;
723 * We only need to know if one frequency rule was
724 * was in center_freq's band, that's enough, so lets
725 * not overwrite it once found
727 if (!band_rule_found
)
728 band_rule_found
= freq_in_rule_band(fr
, center_freq
);
730 bw_fits
= reg_does_bw_fit(fr
, center_freq
, MHZ_TO_KHZ(20));
732 if (band_rule_found
&& bw_fits
)
736 if (!band_rule_found
)
737 return ERR_PTR(-ERANGE
);
739 return ERR_PTR(-EINVAL
);
742 const struct ieee80211_reg_rule
*freq_reg_info(struct wiphy
*wiphy
,
745 const struct ieee80211_regdomain
*regd
;
746 struct regulatory_request
*lr
= get_last_request();
749 * Follow the driver's regulatory domain, if present, unless a country
750 * IE has been processed or a user wants to help complaince further
752 if (lr
->initiator
!= NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
753 lr
->initiator
!= NL80211_REGDOM_SET_BY_USER
&&
755 regd
= get_wiphy_regdom(wiphy
);
757 regd
= get_cfg80211_regdom();
759 return freq_reg_info_regd(wiphy
, center_freq
, regd
);
761 EXPORT_SYMBOL(freq_reg_info
);
763 const char *reg_initiator_name(enum nl80211_reg_initiator initiator
)
766 case NL80211_REGDOM_SET_BY_CORE
:
768 case NL80211_REGDOM_SET_BY_USER
:
770 case NL80211_REGDOM_SET_BY_DRIVER
:
772 case NL80211_REGDOM_SET_BY_COUNTRY_IE
:
779 EXPORT_SYMBOL(reg_initiator_name
);
781 #ifdef CONFIG_CFG80211_REG_DEBUG
782 static void chan_reg_rule_print_dbg(struct ieee80211_channel
*chan
,
783 const struct ieee80211_reg_rule
*reg_rule
)
785 const struct ieee80211_power_rule
*power_rule
;
786 const struct ieee80211_freq_range
*freq_range
;
787 char max_antenna_gain
[32];
789 power_rule
= ®_rule
->power_rule
;
790 freq_range
= ®_rule
->freq_range
;
792 if (!power_rule
->max_antenna_gain
)
793 snprintf(max_antenna_gain
, 32, "N/A");
795 snprintf(max_antenna_gain
, 32, "%d", power_rule
->max_antenna_gain
);
797 REG_DBG_PRINT("Updating information on frequency %d MHz with regulatory rule:\n",
800 REG_DBG_PRINT("%d KHz - %d KHz @ %d KHz), (%s mBi, %d mBm)\n",
801 freq_range
->start_freq_khz
, freq_range
->end_freq_khz
,
802 freq_range
->max_bandwidth_khz
, max_antenna_gain
,
803 power_rule
->max_eirp
);
806 static void chan_reg_rule_print_dbg(struct ieee80211_channel
*chan
,
807 const struct ieee80211_reg_rule
*reg_rule
)
814 * Note that right now we assume the desired channel bandwidth
815 * is always 20 MHz for each individual channel (HT40 uses 20 MHz
816 * per channel, the primary and the extension channel).
818 static void handle_channel(struct wiphy
*wiphy
,
819 enum nl80211_reg_initiator initiator
,
820 struct ieee80211_channel
*chan
)
822 u32 flags
, bw_flags
= 0;
823 const struct ieee80211_reg_rule
*reg_rule
= NULL
;
824 const struct ieee80211_power_rule
*power_rule
= NULL
;
825 const struct ieee80211_freq_range
*freq_range
= NULL
;
826 struct wiphy
*request_wiphy
= NULL
;
827 struct regulatory_request
*lr
= get_last_request();
829 request_wiphy
= wiphy_idx_to_wiphy(lr
->wiphy_idx
);
831 flags
= chan
->orig_flags
;
833 reg_rule
= freq_reg_info(wiphy
, MHZ_TO_KHZ(chan
->center_freq
));
834 if (IS_ERR(reg_rule
)) {
836 * We will disable all channels that do not match our
837 * received regulatory rule unless the hint is coming
838 * from a Country IE and the Country IE had no information
839 * about a band. The IEEE 802.11 spec allows for an AP
840 * to send only a subset of the regulatory rules allowed,
841 * so an AP in the US that only supports 2.4 GHz may only send
842 * a country IE with information for the 2.4 GHz band
843 * while 5 GHz is still supported.
845 if (initiator
== NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
846 PTR_ERR(reg_rule
) == -ERANGE
)
849 if (lr
->initiator
== NL80211_REGDOM_SET_BY_DRIVER
&&
850 request_wiphy
&& request_wiphy
== wiphy
&&
851 request_wiphy
->flags
& WIPHY_FLAG_STRICT_REGULATORY
) {
852 REG_DBG_PRINT("Disabling freq %d MHz for good\n",
854 chan
->orig_flags
|= IEEE80211_CHAN_DISABLED
;
855 chan
->flags
= chan
->orig_flags
;
857 REG_DBG_PRINT("Disabling freq %d MHz\n",
859 chan
->flags
|= IEEE80211_CHAN_DISABLED
;
864 chan_reg_rule_print_dbg(chan
, reg_rule
);
866 power_rule
= ®_rule
->power_rule
;
867 freq_range
= ®_rule
->freq_range
;
869 if (freq_range
->max_bandwidth_khz
< MHZ_TO_KHZ(40))
870 bw_flags
= IEEE80211_CHAN_NO_HT40
;
871 if (freq_range
->max_bandwidth_khz
< MHZ_TO_KHZ(80))
872 bw_flags
|= IEEE80211_CHAN_NO_80MHZ
;
873 if (freq_range
->max_bandwidth_khz
< MHZ_TO_KHZ(160))
874 bw_flags
|= IEEE80211_CHAN_NO_160MHZ
;
876 if (lr
->initiator
== NL80211_REGDOM_SET_BY_DRIVER
&&
877 request_wiphy
&& request_wiphy
== wiphy
&&
878 request_wiphy
->flags
& WIPHY_FLAG_STRICT_REGULATORY
) {
880 * This guarantees the driver's requested regulatory domain
881 * will always be used as a base for further regulatory
884 chan
->flags
= chan
->orig_flags
=
885 map_regdom_flags(reg_rule
->flags
) | bw_flags
;
886 chan
->max_antenna_gain
= chan
->orig_mag
=
887 (int) MBI_TO_DBI(power_rule
->max_antenna_gain
);
888 chan
->max_reg_power
= chan
->max_power
= chan
->orig_mpwr
=
889 (int) MBM_TO_DBM(power_rule
->max_eirp
);
893 chan
->dfs_state
= NL80211_DFS_USABLE
;
894 chan
->dfs_state_entered
= jiffies
;
896 chan
->beacon_found
= false;
897 chan
->flags
= flags
| bw_flags
| map_regdom_flags(reg_rule
->flags
);
898 chan
->max_antenna_gain
=
899 min_t(int, chan
->orig_mag
,
900 MBI_TO_DBI(power_rule
->max_antenna_gain
));
901 chan
->max_reg_power
= (int) MBM_TO_DBM(power_rule
->max_eirp
);
902 if (chan
->orig_mpwr
) {
904 * Devices that have their own custom regulatory domain
905 * but also use WIPHY_FLAG_STRICT_REGULATORY will follow the
906 * passed country IE power settings.
908 if (initiator
== NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
909 wiphy
->flags
& WIPHY_FLAG_CUSTOM_REGULATORY
&&
910 wiphy
->flags
& WIPHY_FLAG_STRICT_REGULATORY
)
911 chan
->max_power
= chan
->max_reg_power
;
913 chan
->max_power
= min(chan
->orig_mpwr
,
914 chan
->max_reg_power
);
916 chan
->max_power
= chan
->max_reg_power
;
919 static void handle_band(struct wiphy
*wiphy
,
920 enum nl80211_reg_initiator initiator
,
921 struct ieee80211_supported_band
*sband
)
928 for (i
= 0; i
< sband
->n_channels
; i
++)
929 handle_channel(wiphy
, initiator
, &sband
->channels
[i
]);
932 static bool reg_request_cell_base(struct regulatory_request
*request
)
934 if (request
->initiator
!= NL80211_REGDOM_SET_BY_USER
)
936 return request
->user_reg_hint_type
== NL80211_USER_REG_HINT_CELL_BASE
;
939 bool reg_last_request_cell_base(void)
941 return reg_request_cell_base(get_last_request());
944 #ifdef CONFIG_CFG80211_CERTIFICATION_ONUS
945 /* Core specific check */
946 static enum reg_request_treatment
947 reg_ignore_cell_hint(struct regulatory_request
*pending_request
)
949 struct regulatory_request
*lr
= get_last_request();
951 if (!reg_num_devs_support_basehint
)
952 return REG_REQ_IGNORE
;
954 if (reg_request_cell_base(lr
) &&
955 !regdom_changes(pending_request
->alpha2
))
956 return REG_REQ_ALREADY_SET
;
961 /* Device specific check */
962 static bool reg_dev_ignore_cell_hint(struct wiphy
*wiphy
)
964 return !(wiphy
->features
& NL80211_FEATURE_CELL_BASE_REG_HINTS
);
967 static int reg_ignore_cell_hint(struct regulatory_request
*pending_request
)
969 return REG_REQ_IGNORE
;
972 static bool reg_dev_ignore_cell_hint(struct wiphy
*wiphy
)
978 static bool wiphy_strict_alpha2_regd(struct wiphy
*wiphy
)
980 if (wiphy
->flags
& WIPHY_FLAG_STRICT_REGULATORY
&&
981 !(wiphy
->flags
& WIPHY_FLAG_CUSTOM_REGULATORY
))
986 static bool ignore_reg_update(struct wiphy
*wiphy
,
987 enum nl80211_reg_initiator initiator
)
989 struct regulatory_request
*lr
= get_last_request();
992 REG_DBG_PRINT("Ignoring regulatory request set by %s "
993 "since last_request is not set\n",
994 reg_initiator_name(initiator
));
998 if (initiator
== NL80211_REGDOM_SET_BY_CORE
&&
999 wiphy
->flags
& WIPHY_FLAG_CUSTOM_REGULATORY
) {
1000 REG_DBG_PRINT("Ignoring regulatory request set by %s "
1001 "since the driver uses its own custom "
1002 "regulatory domain\n",
1003 reg_initiator_name(initiator
));
1008 * wiphy->regd will be set once the device has its own
1009 * desired regulatory domain set
1011 if (wiphy_strict_alpha2_regd(wiphy
) && !wiphy
->regd
&&
1012 initiator
!= NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
1013 !is_world_regdom(lr
->alpha2
)) {
1014 REG_DBG_PRINT("Ignoring regulatory request set by %s "
1015 "since the driver requires its own regulatory "
1016 "domain to be set first\n",
1017 reg_initiator_name(initiator
));
1021 if (reg_request_cell_base(lr
))
1022 return reg_dev_ignore_cell_hint(wiphy
);
1027 static bool reg_is_world_roaming(struct wiphy
*wiphy
)
1029 const struct ieee80211_regdomain
*cr
= get_cfg80211_regdom();
1030 const struct ieee80211_regdomain
*wr
= get_wiphy_regdom(wiphy
);
1031 struct regulatory_request
*lr
= get_last_request();
1033 if (is_world_regdom(cr
->alpha2
) || (wr
&& is_world_regdom(wr
->alpha2
)))
1036 if (lr
&& lr
->initiator
!= NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
1037 wiphy
->flags
& WIPHY_FLAG_CUSTOM_REGULATORY
)
1043 static void handle_reg_beacon(struct wiphy
*wiphy
, unsigned int chan_idx
,
1044 struct reg_beacon
*reg_beacon
)
1046 struct ieee80211_supported_band
*sband
;
1047 struct ieee80211_channel
*chan
;
1048 bool channel_changed
= false;
1049 struct ieee80211_channel chan_before
;
1051 sband
= wiphy
->bands
[reg_beacon
->chan
.band
];
1052 chan
= &sband
->channels
[chan_idx
];
1054 if (likely(chan
->center_freq
!= reg_beacon
->chan
.center_freq
))
1057 if (chan
->beacon_found
)
1060 chan
->beacon_found
= true;
1062 if (!reg_is_world_roaming(wiphy
))
1065 if (wiphy
->flags
& WIPHY_FLAG_DISABLE_BEACON_HINTS
)
1068 chan_before
.center_freq
= chan
->center_freq
;
1069 chan_before
.flags
= chan
->flags
;
1071 if (chan
->flags
& IEEE80211_CHAN_NO_IR
) {
1072 chan
->flags
&= ~IEEE80211_CHAN_NO_IR
;
1073 channel_changed
= true;
1076 if (channel_changed
)
1077 nl80211_send_beacon_hint_event(wiphy
, &chan_before
, chan
);
1081 * Called when a scan on a wiphy finds a beacon on
1084 static void wiphy_update_new_beacon(struct wiphy
*wiphy
,
1085 struct reg_beacon
*reg_beacon
)
1088 struct ieee80211_supported_band
*sband
;
1090 if (!wiphy
->bands
[reg_beacon
->chan
.band
])
1093 sband
= wiphy
->bands
[reg_beacon
->chan
.band
];
1095 for (i
= 0; i
< sband
->n_channels
; i
++)
1096 handle_reg_beacon(wiphy
, i
, reg_beacon
);
1100 * Called upon reg changes or a new wiphy is added
1102 static void wiphy_update_beacon_reg(struct wiphy
*wiphy
)
1105 struct ieee80211_supported_band
*sband
;
1106 struct reg_beacon
*reg_beacon
;
1108 list_for_each_entry(reg_beacon
, ®_beacon_list
, list
) {
1109 if (!wiphy
->bands
[reg_beacon
->chan
.band
])
1111 sband
= wiphy
->bands
[reg_beacon
->chan
.band
];
1112 for (i
= 0; i
< sband
->n_channels
; i
++)
1113 handle_reg_beacon(wiphy
, i
, reg_beacon
);
1117 /* Reap the advantages of previously found beacons */
1118 static void reg_process_beacons(struct wiphy
*wiphy
)
1121 * Means we are just firing up cfg80211, so no beacons would
1122 * have been processed yet.
1126 wiphy_update_beacon_reg(wiphy
);
1129 static bool is_ht40_allowed(struct ieee80211_channel
*chan
)
1133 if (chan
->flags
& IEEE80211_CHAN_DISABLED
)
1135 /* This would happen when regulatory rules disallow HT40 completely */
1136 if ((chan
->flags
& IEEE80211_CHAN_NO_HT40
) == IEEE80211_CHAN_NO_HT40
)
1141 static void reg_process_ht_flags_channel(struct wiphy
*wiphy
,
1142 struct ieee80211_channel
*channel
)
1144 struct ieee80211_supported_band
*sband
= wiphy
->bands
[channel
->band
];
1145 struct ieee80211_channel
*channel_before
= NULL
, *channel_after
= NULL
;
1148 if (!is_ht40_allowed(channel
)) {
1149 channel
->flags
|= IEEE80211_CHAN_NO_HT40
;
1154 * We need to ensure the extension channels exist to
1155 * be able to use HT40- or HT40+, this finds them (or not)
1157 for (i
= 0; i
< sband
->n_channels
; i
++) {
1158 struct ieee80211_channel
*c
= &sband
->channels
[i
];
1160 if (c
->center_freq
== (channel
->center_freq
- 20))
1162 if (c
->center_freq
== (channel
->center_freq
+ 20))
1167 * Please note that this assumes target bandwidth is 20 MHz,
1168 * if that ever changes we also need to change the below logic
1169 * to include that as well.
1171 if (!is_ht40_allowed(channel_before
))
1172 channel
->flags
|= IEEE80211_CHAN_NO_HT40MINUS
;
1174 channel
->flags
&= ~IEEE80211_CHAN_NO_HT40MINUS
;
1176 if (!is_ht40_allowed(channel_after
))
1177 channel
->flags
|= IEEE80211_CHAN_NO_HT40PLUS
;
1179 channel
->flags
&= ~IEEE80211_CHAN_NO_HT40PLUS
;
1182 static void reg_process_ht_flags_band(struct wiphy
*wiphy
,
1183 struct ieee80211_supported_band
*sband
)
1190 for (i
= 0; i
< sband
->n_channels
; i
++)
1191 reg_process_ht_flags_channel(wiphy
, &sband
->channels
[i
]);
1194 static void reg_process_ht_flags(struct wiphy
*wiphy
)
1196 enum ieee80211_band band
;
1201 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++)
1202 reg_process_ht_flags_band(wiphy
, wiphy
->bands
[band
]);
1205 static void wiphy_update_regulatory(struct wiphy
*wiphy
,
1206 enum nl80211_reg_initiator initiator
)
1208 enum ieee80211_band band
;
1209 struct regulatory_request
*lr
= get_last_request();
1211 if (ignore_reg_update(wiphy
, initiator
))
1214 lr
->dfs_region
= get_cfg80211_regdom()->dfs_region
;
1216 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++)
1217 handle_band(wiphy
, initiator
, wiphy
->bands
[band
]);
1219 reg_process_beacons(wiphy
);
1220 reg_process_ht_flags(wiphy
);
1222 if (wiphy
->reg_notifier
)
1223 wiphy
->reg_notifier(wiphy
, lr
);
1226 static void update_all_wiphy_regulatory(enum nl80211_reg_initiator initiator
)
1228 struct cfg80211_registered_device
*rdev
;
1229 struct wiphy
*wiphy
;
1233 list_for_each_entry(rdev
, &cfg80211_rdev_list
, list
) {
1234 wiphy
= &rdev
->wiphy
;
1235 wiphy_update_regulatory(wiphy
, initiator
);
1237 * Regulatory updates set by CORE are ignored for custom
1238 * regulatory cards. Let us notify the changes to the driver,
1239 * as some drivers used this to restore its orig_* reg domain.
1241 if (initiator
== NL80211_REGDOM_SET_BY_CORE
&&
1242 wiphy
->flags
& WIPHY_FLAG_CUSTOM_REGULATORY
&&
1243 wiphy
->reg_notifier
)
1244 wiphy
->reg_notifier(wiphy
, get_last_request());
1248 static void handle_channel_custom(struct wiphy
*wiphy
,
1249 struct ieee80211_channel
*chan
,
1250 const struct ieee80211_regdomain
*regd
)
1253 const struct ieee80211_reg_rule
*reg_rule
= NULL
;
1254 const struct ieee80211_power_rule
*power_rule
= NULL
;
1255 const struct ieee80211_freq_range
*freq_range
= NULL
;
1257 reg_rule
= freq_reg_info_regd(wiphy
, MHZ_TO_KHZ(chan
->center_freq
),
1260 if (IS_ERR(reg_rule
)) {
1261 REG_DBG_PRINT("Disabling freq %d MHz as custom regd has no rule that fits it\n",
1263 chan
->orig_flags
|= IEEE80211_CHAN_DISABLED
;
1264 chan
->flags
= chan
->orig_flags
;
1268 chan_reg_rule_print_dbg(chan
, reg_rule
);
1270 power_rule
= ®_rule
->power_rule
;
1271 freq_range
= ®_rule
->freq_range
;
1273 if (freq_range
->max_bandwidth_khz
< MHZ_TO_KHZ(40))
1274 bw_flags
= IEEE80211_CHAN_NO_HT40
;
1275 if (freq_range
->max_bandwidth_khz
< MHZ_TO_KHZ(80))
1276 bw_flags
|= IEEE80211_CHAN_NO_80MHZ
;
1277 if (freq_range
->max_bandwidth_khz
< MHZ_TO_KHZ(160))
1278 bw_flags
|= IEEE80211_CHAN_NO_160MHZ
;
1280 chan
->flags
|= map_regdom_flags(reg_rule
->flags
) | bw_flags
;
1281 chan
->max_antenna_gain
= (int) MBI_TO_DBI(power_rule
->max_antenna_gain
);
1282 chan
->max_reg_power
= chan
->max_power
=
1283 (int) MBM_TO_DBM(power_rule
->max_eirp
);
1286 static void handle_band_custom(struct wiphy
*wiphy
,
1287 struct ieee80211_supported_band
*sband
,
1288 const struct ieee80211_regdomain
*regd
)
1295 for (i
= 0; i
< sband
->n_channels
; i
++)
1296 handle_channel_custom(wiphy
, &sband
->channels
[i
], regd
);
1299 /* Used by drivers prior to wiphy registration */
1300 void wiphy_apply_custom_regulatory(struct wiphy
*wiphy
,
1301 const struct ieee80211_regdomain
*regd
)
1303 enum ieee80211_band band
;
1304 unsigned int bands_set
= 0;
1306 WARN(!(wiphy
->flags
& WIPHY_FLAG_CUSTOM_REGULATORY
),
1307 "wiphy should have WIPHY_FLAG_CUSTOM_REGULATORY\n");
1308 wiphy
->flags
|= WIPHY_FLAG_CUSTOM_REGULATORY
;
1310 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++) {
1311 if (!wiphy
->bands
[band
])
1313 handle_band_custom(wiphy
, wiphy
->bands
[band
], regd
);
1318 * no point in calling this if it won't have any effect
1319 * on your device's supported bands.
1321 WARN_ON(!bands_set
);
1323 EXPORT_SYMBOL(wiphy_apply_custom_regulatory
);
1325 /* This has the logic which determines when a new request
1326 * should be ignored. */
1327 static enum reg_request_treatment
1328 get_reg_request_treatment(struct wiphy
*wiphy
,
1329 struct regulatory_request
*pending_request
)
1331 struct wiphy
*last_wiphy
= NULL
;
1332 struct regulatory_request
*lr
= get_last_request();
1334 /* All initial requests are respected */
1338 switch (pending_request
->initiator
) {
1339 case NL80211_REGDOM_SET_BY_CORE
:
1340 return REG_REQ_IGNORE
;
1341 case NL80211_REGDOM_SET_BY_COUNTRY_IE
:
1342 if (reg_request_cell_base(lr
)) {
1343 /* Trust a Cell base station over the AP's country IE */
1344 if (regdom_changes(pending_request
->alpha2
))
1345 return REG_REQ_IGNORE
;
1346 return REG_REQ_ALREADY_SET
;
1349 last_wiphy
= wiphy_idx_to_wiphy(lr
->wiphy_idx
);
1351 if (unlikely(!is_an_alpha2(pending_request
->alpha2
)))
1353 if (lr
->initiator
== NL80211_REGDOM_SET_BY_COUNTRY_IE
) {
1354 if (last_wiphy
!= wiphy
) {
1356 * Two cards with two APs claiming different
1357 * Country IE alpha2s. We could
1358 * intersect them, but that seems unlikely
1359 * to be correct. Reject second one for now.
1361 if (regdom_changes(pending_request
->alpha2
))
1362 return REG_REQ_IGNORE
;
1363 return REG_REQ_ALREADY_SET
;
1366 * Two consecutive Country IE hints on the same wiphy.
1367 * This should be picked up early by the driver/stack
1369 if (WARN_ON(regdom_changes(pending_request
->alpha2
)))
1371 return REG_REQ_ALREADY_SET
;
1374 case NL80211_REGDOM_SET_BY_DRIVER
:
1375 if (lr
->initiator
== NL80211_REGDOM_SET_BY_CORE
) {
1376 if (regdom_changes(pending_request
->alpha2
))
1378 return REG_REQ_ALREADY_SET
;
1382 * This would happen if you unplug and plug your card
1383 * back in or if you add a new device for which the previously
1384 * loaded card also agrees on the regulatory domain.
1386 if (lr
->initiator
== NL80211_REGDOM_SET_BY_DRIVER
&&
1387 !regdom_changes(pending_request
->alpha2
))
1388 return REG_REQ_ALREADY_SET
;
1390 return REG_REQ_INTERSECT
;
1391 case NL80211_REGDOM_SET_BY_USER
:
1392 if (reg_request_cell_base(pending_request
))
1393 return reg_ignore_cell_hint(pending_request
);
1395 if (reg_request_cell_base(lr
))
1396 return REG_REQ_IGNORE
;
1398 if (lr
->initiator
== NL80211_REGDOM_SET_BY_COUNTRY_IE
)
1399 return REG_REQ_INTERSECT
;
1401 * If the user knows better the user should set the regdom
1402 * to their country before the IE is picked up
1404 if (lr
->initiator
== NL80211_REGDOM_SET_BY_USER
&&
1406 return REG_REQ_IGNORE
;
1408 * Process user requests only after previous user/driver/core
1409 * requests have been processed
1411 if ((lr
->initiator
== NL80211_REGDOM_SET_BY_CORE
||
1412 lr
->initiator
== NL80211_REGDOM_SET_BY_DRIVER
||
1413 lr
->initiator
== NL80211_REGDOM_SET_BY_USER
) &&
1414 regdom_changes(lr
->alpha2
))
1415 return REG_REQ_IGNORE
;
1417 if (!regdom_changes(pending_request
->alpha2
))
1418 return REG_REQ_ALREADY_SET
;
1423 return REG_REQ_IGNORE
;
1426 static void reg_set_request_processed(void)
1428 bool need_more_processing
= false;
1429 struct regulatory_request
*lr
= get_last_request();
1431 lr
->processed
= true;
1433 spin_lock(®_requests_lock
);
1434 if (!list_empty(®_requests_list
))
1435 need_more_processing
= true;
1436 spin_unlock(®_requests_lock
);
1438 if (lr
->initiator
== NL80211_REGDOM_SET_BY_USER
)
1439 cancel_delayed_work(®_timeout
);
1441 if (need_more_processing
)
1442 schedule_work(®_work
);
1446 * reg_process_hint_core - process core regulatory requests
1447 * @pending_request: a pending core regulatory request
1449 * The wireless subsystem can use this function to process
1450 * a regulatory request issued by the regulatory core.
1452 * Returns one of the different reg request treatment values.
1454 static enum reg_request_treatment
1455 reg_process_hint_core(struct regulatory_request
*core_request
)
1457 struct regulatory_request
*lr
;
1459 lr
= get_last_request();
1460 if (lr
!= &core_request_world
&& lr
)
1461 kfree_rcu(lr
, rcu_head
);
1463 core_request
->intersect
= false;
1464 core_request
->processed
= false;
1465 rcu_assign_pointer(last_request
, core_request
);
1467 if (call_crda(core_request
->alpha2
))
1468 return REG_REQ_IGNORE
;
1473 * __regulatory_hint - hint to the wireless core a regulatory domain
1474 * @wiphy: if the hint comes from country information from an AP, this
1475 * is required to be set to the wiphy that received the information
1476 * @pending_request: the regulatory request currently being processed
1478 * The Wireless subsystem can use this function to hint to the wireless core
1479 * what it believes should be the current regulatory domain.
1481 * Returns one of the different reg request treatment values.
1483 static enum reg_request_treatment
1484 __regulatory_hint(struct wiphy
*wiphy
,
1485 struct regulatory_request
*pending_request
)
1487 const struct ieee80211_regdomain
*regd
;
1488 bool intersect
= false;
1489 enum reg_request_treatment treatment
;
1490 struct regulatory_request
*lr
;
1492 treatment
= get_reg_request_treatment(wiphy
, pending_request
);
1494 switch (treatment
) {
1495 case REG_REQ_INTERSECT
:
1496 if (pending_request
->initiator
==
1497 NL80211_REGDOM_SET_BY_DRIVER
) {
1498 regd
= reg_copy_regd(get_cfg80211_regdom());
1500 kfree(pending_request
);
1501 return PTR_ERR(regd
);
1503 rcu_assign_pointer(wiphy
->regd
, regd
);
1511 * If the regulatory domain being requested by the
1512 * driver has already been set just copy it to the
1515 if (treatment
== REG_REQ_ALREADY_SET
&&
1516 pending_request
->initiator
== NL80211_REGDOM_SET_BY_DRIVER
) {
1517 regd
= reg_copy_regd(get_cfg80211_regdom());
1519 kfree(pending_request
);
1520 return REG_REQ_IGNORE
;
1522 treatment
= REG_REQ_ALREADY_SET
;
1523 rcu_assign_pointer(wiphy
->regd
, regd
);
1526 kfree(pending_request
);
1531 lr
= get_last_request();
1532 if (lr
!= &core_request_world
&& lr
)
1533 kfree_rcu(lr
, rcu_head
);
1535 pending_request
->intersect
= intersect
;
1536 pending_request
->processed
= false;
1537 rcu_assign_pointer(last_request
, pending_request
);
1538 lr
= pending_request
;
1540 pending_request
= NULL
;
1542 if (lr
->initiator
== NL80211_REGDOM_SET_BY_USER
) {
1543 user_alpha2
[0] = lr
->alpha2
[0];
1544 user_alpha2
[1] = lr
->alpha2
[1];
1547 /* When r == REG_REQ_INTERSECT we do need to call CRDA */
1548 if (treatment
!= REG_REQ_OK
&& treatment
!= REG_REQ_INTERSECT
) {
1550 * Since CRDA will not be called in this case as we already
1551 * have applied the requested regulatory domain before we just
1552 * inform userspace we have processed the request
1554 if (treatment
== REG_REQ_ALREADY_SET
) {
1555 nl80211_send_reg_change_event(lr
);
1556 reg_set_request_processed();
1561 if (call_crda(lr
->alpha2
))
1562 return REG_REQ_IGNORE
;
1566 /* This processes *all* regulatory hints */
1567 static void reg_process_hint(struct regulatory_request
*reg_request
)
1569 struct wiphy
*wiphy
= NULL
;
1570 enum reg_request_treatment treatment
;
1572 if (WARN_ON(!reg_request
->alpha2
))
1575 if (reg_request
->wiphy_idx
!= WIPHY_IDX_INVALID
)
1576 wiphy
= wiphy_idx_to_wiphy(reg_request
->wiphy_idx
);
1578 if (reg_request
->initiator
== NL80211_REGDOM_SET_BY_DRIVER
&& !wiphy
) {
1583 switch (reg_request
->initiator
) {
1584 case NL80211_REGDOM_SET_BY_CORE
:
1585 reg_process_hint_core(reg_request
);
1587 case NL80211_REGDOM_SET_BY_USER
:
1588 case NL80211_REGDOM_SET_BY_DRIVER
:
1589 case NL80211_REGDOM_SET_BY_COUNTRY_IE
:
1590 treatment
= __regulatory_hint(wiphy
, reg_request
);
1593 WARN(1, "invalid initiator %d\n", reg_request
->initiator
);
1597 switch (treatment
) {
1598 case REG_REQ_ALREADY_SET
:
1599 /* This is required so that the orig_* parameters are saved */
1600 if (wiphy
&& wiphy
->flags
& WIPHY_FLAG_STRICT_REGULATORY
)
1601 wiphy_update_regulatory(wiphy
, reg_request
->initiator
);
1604 if (reg_request
->initiator
== NL80211_REGDOM_SET_BY_USER
)
1605 schedule_delayed_work(®_timeout
,
1606 msecs_to_jiffies(3142));
1612 * Processes regulatory hints, this is all the NL80211_REGDOM_SET_BY_*
1613 * Regulatory hints come on a first come first serve basis and we
1614 * must process each one atomically.
1616 static void reg_process_pending_hints(void)
1618 struct regulatory_request
*reg_request
, *lr
;
1620 lr
= get_last_request();
1622 /* When last_request->processed becomes true this will be rescheduled */
1623 if (lr
&& !lr
->processed
) {
1624 REG_DBG_PRINT("Pending regulatory request, waiting for it to be processed...\n");
1628 spin_lock(®_requests_lock
);
1630 if (list_empty(®_requests_list
)) {
1631 spin_unlock(®_requests_lock
);
1635 reg_request
= list_first_entry(®_requests_list
,
1636 struct regulatory_request
,
1638 list_del_init(®_request
->list
);
1640 spin_unlock(®_requests_lock
);
1642 reg_process_hint(reg_request
);
1645 /* Processes beacon hints -- this has nothing to do with country IEs */
1646 static void reg_process_pending_beacon_hints(void)
1648 struct cfg80211_registered_device
*rdev
;
1649 struct reg_beacon
*pending_beacon
, *tmp
;
1651 /* This goes through the _pending_ beacon list */
1652 spin_lock_bh(®_pending_beacons_lock
);
1654 list_for_each_entry_safe(pending_beacon
, tmp
,
1655 ®_pending_beacons
, list
) {
1656 list_del_init(&pending_beacon
->list
);
1658 /* Applies the beacon hint to current wiphys */
1659 list_for_each_entry(rdev
, &cfg80211_rdev_list
, list
)
1660 wiphy_update_new_beacon(&rdev
->wiphy
, pending_beacon
);
1662 /* Remembers the beacon hint for new wiphys or reg changes */
1663 list_add_tail(&pending_beacon
->list
, ®_beacon_list
);
1666 spin_unlock_bh(®_pending_beacons_lock
);
1669 static void reg_todo(struct work_struct
*work
)
1672 reg_process_pending_hints();
1673 reg_process_pending_beacon_hints();
1677 static void queue_regulatory_request(struct regulatory_request
*request
)
1679 request
->alpha2
[0] = toupper(request
->alpha2
[0]);
1680 request
->alpha2
[1] = toupper(request
->alpha2
[1]);
1682 spin_lock(®_requests_lock
);
1683 list_add_tail(&request
->list
, ®_requests_list
);
1684 spin_unlock(®_requests_lock
);
1686 schedule_work(®_work
);
1690 * Core regulatory hint -- happens during cfg80211_init()
1691 * and when we restore regulatory settings.
1693 static int regulatory_hint_core(const char *alpha2
)
1695 struct regulatory_request
*request
;
1697 request
= kzalloc(sizeof(struct regulatory_request
), GFP_KERNEL
);
1701 request
->alpha2
[0] = alpha2
[0];
1702 request
->alpha2
[1] = alpha2
[1];
1703 request
->initiator
= NL80211_REGDOM_SET_BY_CORE
;
1705 queue_regulatory_request(request
);
1711 int regulatory_hint_user(const char *alpha2
,
1712 enum nl80211_user_reg_hint_type user_reg_hint_type
)
1714 struct regulatory_request
*request
;
1716 if (WARN_ON(!alpha2
))
1719 request
= kzalloc(sizeof(struct regulatory_request
), GFP_KERNEL
);
1723 request
->wiphy_idx
= WIPHY_IDX_INVALID
;
1724 request
->alpha2
[0] = alpha2
[0];
1725 request
->alpha2
[1] = alpha2
[1];
1726 request
->initiator
= NL80211_REGDOM_SET_BY_USER
;
1727 request
->user_reg_hint_type
= user_reg_hint_type
;
1729 queue_regulatory_request(request
);
1735 int regulatory_hint(struct wiphy
*wiphy
, const char *alpha2
)
1737 struct regulatory_request
*request
;
1739 if (WARN_ON(!alpha2
|| !wiphy
))
1742 request
= kzalloc(sizeof(struct regulatory_request
), GFP_KERNEL
);
1746 request
->wiphy_idx
= get_wiphy_idx(wiphy
);
1748 request
->alpha2
[0] = alpha2
[0];
1749 request
->alpha2
[1] = alpha2
[1];
1750 request
->initiator
= NL80211_REGDOM_SET_BY_DRIVER
;
1752 queue_regulatory_request(request
);
1756 EXPORT_SYMBOL(regulatory_hint
);
1758 void regulatory_hint_country_ie(struct wiphy
*wiphy
, enum ieee80211_band band
,
1759 const u8
*country_ie
, u8 country_ie_len
)
1762 enum environment_cap env
= ENVIRON_ANY
;
1763 struct regulatory_request
*request
= NULL
, *lr
;
1765 /* IE len must be evenly divisible by 2 */
1766 if (country_ie_len
& 0x01)
1769 if (country_ie_len
< IEEE80211_COUNTRY_IE_MIN_LEN
)
1772 request
= kzalloc(sizeof(*request
), GFP_KERNEL
);
1776 alpha2
[0] = country_ie
[0];
1777 alpha2
[1] = country_ie
[1];
1779 if (country_ie
[2] == 'I')
1780 env
= ENVIRON_INDOOR
;
1781 else if (country_ie
[2] == 'O')
1782 env
= ENVIRON_OUTDOOR
;
1785 lr
= get_last_request();
1791 * We will run this only upon a successful connection on cfg80211.
1792 * We leave conflict resolution to the workqueue, where can hold
1795 if (lr
->initiator
== NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
1796 lr
->wiphy_idx
!= WIPHY_IDX_INVALID
)
1799 request
->wiphy_idx
= get_wiphy_idx(wiphy
);
1800 request
->alpha2
[0] = alpha2
[0];
1801 request
->alpha2
[1] = alpha2
[1];
1802 request
->initiator
= NL80211_REGDOM_SET_BY_COUNTRY_IE
;
1803 request
->country_ie_env
= env
;
1805 queue_regulatory_request(request
);
1812 static void restore_alpha2(char *alpha2
, bool reset_user
)
1814 /* indicates there is no alpha2 to consider for restoration */
1818 /* The user setting has precedence over the module parameter */
1819 if (is_user_regdom_saved()) {
1820 /* Unless we're asked to ignore it and reset it */
1822 REG_DBG_PRINT("Restoring regulatory settings including user preference\n");
1823 user_alpha2
[0] = '9';
1824 user_alpha2
[1] = '7';
1827 * If we're ignoring user settings, we still need to
1828 * check the module parameter to ensure we put things
1829 * back as they were for a full restore.
1831 if (!is_world_regdom(ieee80211_regdom
)) {
1832 REG_DBG_PRINT("Keeping preference on module parameter ieee80211_regdom: %c%c\n",
1833 ieee80211_regdom
[0], ieee80211_regdom
[1]);
1834 alpha2
[0] = ieee80211_regdom
[0];
1835 alpha2
[1] = ieee80211_regdom
[1];
1838 REG_DBG_PRINT("Restoring regulatory settings while preserving user preference for: %c%c\n",
1839 user_alpha2
[0], user_alpha2
[1]);
1840 alpha2
[0] = user_alpha2
[0];
1841 alpha2
[1] = user_alpha2
[1];
1843 } else if (!is_world_regdom(ieee80211_regdom
)) {
1844 REG_DBG_PRINT("Keeping preference on module parameter ieee80211_regdom: %c%c\n",
1845 ieee80211_regdom
[0], ieee80211_regdom
[1]);
1846 alpha2
[0] = ieee80211_regdom
[0];
1847 alpha2
[1] = ieee80211_regdom
[1];
1849 REG_DBG_PRINT("Restoring regulatory settings\n");
1852 static void restore_custom_reg_settings(struct wiphy
*wiphy
)
1854 struct ieee80211_supported_band
*sband
;
1855 enum ieee80211_band band
;
1856 struct ieee80211_channel
*chan
;
1859 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++) {
1860 sband
= wiphy
->bands
[band
];
1863 for (i
= 0; i
< sband
->n_channels
; i
++) {
1864 chan
= &sband
->channels
[i
];
1865 chan
->flags
= chan
->orig_flags
;
1866 chan
->max_antenna_gain
= chan
->orig_mag
;
1867 chan
->max_power
= chan
->orig_mpwr
;
1868 chan
->beacon_found
= false;
1874 * Restoring regulatory settings involves ingoring any
1875 * possibly stale country IE information and user regulatory
1876 * settings if so desired, this includes any beacon hints
1877 * learned as we could have traveled outside to another country
1878 * after disconnection. To restore regulatory settings we do
1879 * exactly what we did at bootup:
1881 * - send a core regulatory hint
1882 * - send a user regulatory hint if applicable
1884 * Device drivers that send a regulatory hint for a specific country
1885 * keep their own regulatory domain on wiphy->regd so that does does
1886 * not need to be remembered.
1888 static void restore_regulatory_settings(bool reset_user
)
1891 char world_alpha2
[2];
1892 struct reg_beacon
*reg_beacon
, *btmp
;
1893 struct regulatory_request
*reg_request
, *tmp
;
1894 LIST_HEAD(tmp_reg_req_list
);
1895 struct cfg80211_registered_device
*rdev
;
1899 reset_regdomains(true, &world_regdom
);
1900 restore_alpha2(alpha2
, reset_user
);
1903 * If there's any pending requests we simply
1904 * stash them to a temporary pending queue and
1905 * add then after we've restored regulatory
1908 spin_lock(®_requests_lock
);
1909 list_for_each_entry_safe(reg_request
, tmp
, ®_requests_list
, list
) {
1910 if (reg_request
->initiator
!= NL80211_REGDOM_SET_BY_USER
)
1912 list_move_tail(®_request
->list
, &tmp_reg_req_list
);
1914 spin_unlock(®_requests_lock
);
1916 /* Clear beacon hints */
1917 spin_lock_bh(®_pending_beacons_lock
);
1918 list_for_each_entry_safe(reg_beacon
, btmp
, ®_pending_beacons
, list
) {
1919 list_del(®_beacon
->list
);
1922 spin_unlock_bh(®_pending_beacons_lock
);
1924 list_for_each_entry_safe(reg_beacon
, btmp
, ®_beacon_list
, list
) {
1925 list_del(®_beacon
->list
);
1929 /* First restore to the basic regulatory settings */
1930 world_alpha2
[0] = cfg80211_world_regdom
->alpha2
[0];
1931 world_alpha2
[1] = cfg80211_world_regdom
->alpha2
[1];
1933 list_for_each_entry(rdev
, &cfg80211_rdev_list
, list
) {
1934 if (rdev
->wiphy
.flags
& WIPHY_FLAG_CUSTOM_REGULATORY
)
1935 restore_custom_reg_settings(&rdev
->wiphy
);
1938 regulatory_hint_core(world_alpha2
);
1941 * This restores the ieee80211_regdom module parameter
1942 * preference or the last user requested regulatory
1943 * settings, user regulatory settings takes precedence.
1945 if (is_an_alpha2(alpha2
))
1946 regulatory_hint_user(user_alpha2
, NL80211_USER_REG_HINT_USER
);
1948 spin_lock(®_requests_lock
);
1949 list_splice_tail_init(&tmp_reg_req_list
, ®_requests_list
);
1950 spin_unlock(®_requests_lock
);
1952 REG_DBG_PRINT("Kicking the queue\n");
1954 schedule_work(®_work
);
1957 void regulatory_hint_disconnect(void)
1959 REG_DBG_PRINT("All devices are disconnected, going to restore regulatory settings\n");
1960 restore_regulatory_settings(false);
1963 static bool freq_is_chan_12_13_14(u16 freq
)
1965 if (freq
== ieee80211_channel_to_frequency(12, IEEE80211_BAND_2GHZ
) ||
1966 freq
== ieee80211_channel_to_frequency(13, IEEE80211_BAND_2GHZ
) ||
1967 freq
== ieee80211_channel_to_frequency(14, IEEE80211_BAND_2GHZ
))
1972 static bool pending_reg_beacon(struct ieee80211_channel
*beacon_chan
)
1974 struct reg_beacon
*pending_beacon
;
1976 list_for_each_entry(pending_beacon
, ®_pending_beacons
, list
)
1977 if (beacon_chan
->center_freq
==
1978 pending_beacon
->chan
.center_freq
)
1983 int regulatory_hint_found_beacon(struct wiphy
*wiphy
,
1984 struct ieee80211_channel
*beacon_chan
,
1987 struct reg_beacon
*reg_beacon
;
1990 if (beacon_chan
->beacon_found
||
1991 beacon_chan
->flags
& IEEE80211_CHAN_RADAR
||
1992 (beacon_chan
->band
== IEEE80211_BAND_2GHZ
&&
1993 !freq_is_chan_12_13_14(beacon_chan
->center_freq
)))
1996 spin_lock_bh(®_pending_beacons_lock
);
1997 processing
= pending_reg_beacon(beacon_chan
);
1998 spin_unlock_bh(®_pending_beacons_lock
);
2003 reg_beacon
= kzalloc(sizeof(struct reg_beacon
), gfp
);
2007 REG_DBG_PRINT("Found new beacon on frequency: %d MHz (Ch %d) on %s\n",
2008 beacon_chan
->center_freq
,
2009 ieee80211_frequency_to_channel(beacon_chan
->center_freq
),
2012 memcpy(®_beacon
->chan
, beacon_chan
,
2013 sizeof(struct ieee80211_channel
));
2016 * Since we can be called from BH or and non-BH context
2017 * we must use spin_lock_bh()
2019 spin_lock_bh(®_pending_beacons_lock
);
2020 list_add_tail(®_beacon
->list
, ®_pending_beacons
);
2021 spin_unlock_bh(®_pending_beacons_lock
);
2023 schedule_work(®_work
);
2028 static void print_rd_rules(const struct ieee80211_regdomain
*rd
)
2031 const struct ieee80211_reg_rule
*reg_rule
= NULL
;
2032 const struct ieee80211_freq_range
*freq_range
= NULL
;
2033 const struct ieee80211_power_rule
*power_rule
= NULL
;
2035 pr_info(" (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)\n");
2037 for (i
= 0; i
< rd
->n_reg_rules
; i
++) {
2038 reg_rule
= &rd
->reg_rules
[i
];
2039 freq_range
= ®_rule
->freq_range
;
2040 power_rule
= ®_rule
->power_rule
;
2043 * There may not be documentation for max antenna gain
2044 * in certain regions
2046 if (power_rule
->max_antenna_gain
)
2047 pr_info(" (%d KHz - %d KHz @ %d KHz), (%d mBi, %d mBm)\n",
2048 freq_range
->start_freq_khz
,
2049 freq_range
->end_freq_khz
,
2050 freq_range
->max_bandwidth_khz
,
2051 power_rule
->max_antenna_gain
,
2052 power_rule
->max_eirp
);
2054 pr_info(" (%d KHz - %d KHz @ %d KHz), (N/A, %d mBm)\n",
2055 freq_range
->start_freq_khz
,
2056 freq_range
->end_freq_khz
,
2057 freq_range
->max_bandwidth_khz
,
2058 power_rule
->max_eirp
);
2062 bool reg_supported_dfs_region(u8 dfs_region
)
2064 switch (dfs_region
) {
2065 case NL80211_DFS_UNSET
:
2066 case NL80211_DFS_FCC
:
2067 case NL80211_DFS_ETSI
:
2068 case NL80211_DFS_JP
:
2071 REG_DBG_PRINT("Ignoring uknown DFS master region: %d\n",
2077 static void print_dfs_region(u8 dfs_region
)
2082 switch (dfs_region
) {
2083 case NL80211_DFS_FCC
:
2084 pr_info(" DFS Master region FCC");
2086 case NL80211_DFS_ETSI
:
2087 pr_info(" DFS Master region ETSI");
2089 case NL80211_DFS_JP
:
2090 pr_info(" DFS Master region JP");
2093 pr_info(" DFS Master region Unknown");
2098 static void print_regdomain(const struct ieee80211_regdomain
*rd
)
2100 struct regulatory_request
*lr
= get_last_request();
2102 if (is_intersected_alpha2(rd
->alpha2
)) {
2103 if (lr
->initiator
== NL80211_REGDOM_SET_BY_COUNTRY_IE
) {
2104 struct cfg80211_registered_device
*rdev
;
2105 rdev
= cfg80211_rdev_by_wiphy_idx(lr
->wiphy_idx
);
2107 pr_info("Current regulatory domain updated by AP to: %c%c\n",
2108 rdev
->country_ie_alpha2
[0],
2109 rdev
->country_ie_alpha2
[1]);
2111 pr_info("Current regulatory domain intersected:\n");
2113 pr_info("Current regulatory domain intersected:\n");
2114 } else if (is_world_regdom(rd
->alpha2
)) {
2115 pr_info("World regulatory domain updated:\n");
2117 if (is_unknown_alpha2(rd
->alpha2
))
2118 pr_info("Regulatory domain changed to driver built-in settings (unknown country)\n");
2120 if (reg_request_cell_base(lr
))
2121 pr_info("Regulatory domain changed to country: %c%c by Cell Station\n",
2122 rd
->alpha2
[0], rd
->alpha2
[1]);
2124 pr_info("Regulatory domain changed to country: %c%c\n",
2125 rd
->alpha2
[0], rd
->alpha2
[1]);
2129 print_dfs_region(rd
->dfs_region
);
2133 static void print_regdomain_info(const struct ieee80211_regdomain
*rd
)
2135 pr_info("Regulatory domain: %c%c\n", rd
->alpha2
[0], rd
->alpha2
[1]);
2139 /* Takes ownership of rd only if it doesn't fail */
2140 static int __set_regdom(const struct ieee80211_regdomain
*rd
)
2142 const struct ieee80211_regdomain
*regd
;
2143 const struct ieee80211_regdomain
*intersected_rd
= NULL
;
2144 struct wiphy
*request_wiphy
;
2145 struct regulatory_request
*lr
= get_last_request();
2147 /* Some basic sanity checks first */
2149 if (!reg_is_valid_request(rd
->alpha2
))
2152 if (is_world_regdom(rd
->alpha2
)) {
2153 update_world_regdomain(rd
);
2157 if (!is_alpha2_set(rd
->alpha2
) && !is_an_alpha2(rd
->alpha2
) &&
2158 !is_unknown_alpha2(rd
->alpha2
))
2162 * Lets only bother proceeding on the same alpha2 if the current
2163 * rd is non static (it means CRDA was present and was used last)
2164 * and the pending request came in from a country IE
2166 if (lr
->initiator
!= NL80211_REGDOM_SET_BY_COUNTRY_IE
) {
2168 * If someone else asked us to change the rd lets only bother
2169 * checking if the alpha2 changes if CRDA was already called
2171 if (!regdom_changes(rd
->alpha2
))
2176 * Now lets set the regulatory domain, update all driver channels
2177 * and finally inform them of what we have done, in case they want
2178 * to review or adjust their own settings based on their own
2179 * internal EEPROM data
2182 if (!is_valid_rd(rd
)) {
2183 pr_err("Invalid regulatory domain detected:\n");
2184 print_regdomain_info(rd
);
2188 request_wiphy
= wiphy_idx_to_wiphy(lr
->wiphy_idx
);
2189 if (!request_wiphy
&&
2190 (lr
->initiator
== NL80211_REGDOM_SET_BY_DRIVER
||
2191 lr
->initiator
== NL80211_REGDOM_SET_BY_COUNTRY_IE
)) {
2192 schedule_delayed_work(®_timeout
, 0);
2196 if (!lr
->intersect
) {
2197 if (lr
->initiator
!= NL80211_REGDOM_SET_BY_DRIVER
) {
2198 reset_regdomains(false, rd
);
2203 * For a driver hint, lets copy the regulatory domain the
2204 * driver wanted to the wiphy to deal with conflicts
2208 * Userspace could have sent two replies with only
2209 * one kernel request.
2211 if (request_wiphy
->regd
)
2214 regd
= reg_copy_regd(rd
);
2216 return PTR_ERR(regd
);
2218 rcu_assign_pointer(request_wiphy
->regd
, regd
);
2219 reset_regdomains(false, rd
);
2223 /* Intersection requires a bit more work */
2225 if (lr
->initiator
!= NL80211_REGDOM_SET_BY_COUNTRY_IE
) {
2226 intersected_rd
= regdom_intersect(rd
, get_cfg80211_regdom());
2227 if (!intersected_rd
)
2231 * We can trash what CRDA provided now.
2232 * However if a driver requested this specific regulatory
2233 * domain we keep it for its private use
2235 if (lr
->initiator
== NL80211_REGDOM_SET_BY_DRIVER
) {
2236 const struct ieee80211_regdomain
*tmp
;
2238 tmp
= get_wiphy_regdom(request_wiphy
);
2239 rcu_assign_pointer(request_wiphy
->regd
, rd
);
2240 rcu_free_regdom(tmp
);
2247 reset_regdomains(false, intersected_rd
);
2257 * Use this call to set the current regulatory domain. Conflicts with
2258 * multiple drivers can be ironed out later. Caller must've already
2259 * kmalloc'd the rd structure.
2261 int set_regdom(const struct ieee80211_regdomain
*rd
)
2263 struct regulatory_request
*lr
;
2266 lr
= get_last_request();
2268 /* Note that this doesn't update the wiphys, this is done below */
2269 r
= __set_regdom(rd
);
2272 reg_set_request_processed();
2278 /* This would make this whole thing pointless */
2279 if (WARN_ON(!lr
->intersect
&& rd
!= get_cfg80211_regdom()))
2282 /* update all wiphys now with the new established regulatory domain */
2283 update_all_wiphy_regulatory(lr
->initiator
);
2285 print_regdomain(get_cfg80211_regdom());
2287 nl80211_send_reg_change_event(lr
);
2289 reg_set_request_processed();
2294 int reg_device_uevent(struct device
*dev
, struct kobj_uevent_env
*env
)
2296 struct regulatory_request
*lr
;
2301 lr
= get_last_request();
2302 if (lr
&& !lr
->processed
) {
2303 memcpy(alpha2
, lr
->alpha2
, 2);
2309 return add_uevent_var(env
, "COUNTRY=%c%c",
2310 alpha2
[0], alpha2
[1]);
2314 void wiphy_regulatory_register(struct wiphy
*wiphy
)
2316 struct regulatory_request
*lr
;
2318 if (!reg_dev_ignore_cell_hint(wiphy
))
2319 reg_num_devs_support_basehint
++;
2321 lr
= get_last_request();
2322 wiphy_update_regulatory(wiphy
, lr
->initiator
);
2325 void wiphy_regulatory_deregister(struct wiphy
*wiphy
)
2327 struct wiphy
*request_wiphy
= NULL
;
2328 struct regulatory_request
*lr
;
2330 lr
= get_last_request();
2332 if (!reg_dev_ignore_cell_hint(wiphy
))
2333 reg_num_devs_support_basehint
--;
2335 rcu_free_regdom(get_wiphy_regdom(wiphy
));
2336 rcu_assign_pointer(wiphy
->regd
, NULL
);
2339 request_wiphy
= wiphy_idx_to_wiphy(lr
->wiphy_idx
);
2341 if (!request_wiphy
|| request_wiphy
!= wiphy
)
2344 lr
->wiphy_idx
= WIPHY_IDX_INVALID
;
2345 lr
->country_ie_env
= ENVIRON_ANY
;
2348 static void reg_timeout_work(struct work_struct
*work
)
2350 REG_DBG_PRINT("Timeout while waiting for CRDA to reply, restoring regulatory settings\n");
2352 restore_regulatory_settings(true);
2356 int __init
regulatory_init(void)
2360 reg_pdev
= platform_device_register_simple("regulatory", 0, NULL
, 0);
2361 if (IS_ERR(reg_pdev
))
2362 return PTR_ERR(reg_pdev
);
2364 reg_pdev
->dev
.type
= ®_device_type
;
2366 spin_lock_init(®_requests_lock
);
2367 spin_lock_init(®_pending_beacons_lock
);
2369 reg_regdb_size_check();
2371 rcu_assign_pointer(cfg80211_regdomain
, cfg80211_world_regdom
);
2373 user_alpha2
[0] = '9';
2374 user_alpha2
[1] = '7';
2376 /* We always try to get an update for the static regdomain */
2377 err
= regulatory_hint_core(cfg80211_world_regdom
->alpha2
);
2382 * N.B. kobject_uevent_env() can fail mainly for when we're out
2383 * memory which is handled and propagated appropriately above
2384 * but it can also fail during a netlink_broadcast() or during
2385 * early boot for call_usermodehelper(). For now treat these
2386 * errors as non-fatal.
2388 pr_err("kobject_uevent_env() was unable to call CRDA during init\n");
2392 * Finally, if the user set the module parameter treat it
2395 if (!is_world_regdom(ieee80211_regdom
))
2396 regulatory_hint_user(ieee80211_regdom
,
2397 NL80211_USER_REG_HINT_USER
);
2402 void regulatory_exit(void)
2404 struct regulatory_request
*reg_request
, *tmp
;
2405 struct reg_beacon
*reg_beacon
, *btmp
;
2407 cancel_work_sync(®_work
);
2408 cancel_delayed_work_sync(®_timeout
);
2410 /* Lock to suppress warnings */
2412 reset_regdomains(true, NULL
);
2415 dev_set_uevent_suppress(®_pdev
->dev
, true);
2417 platform_device_unregister(reg_pdev
);
2419 list_for_each_entry_safe(reg_beacon
, btmp
, ®_pending_beacons
, list
) {
2420 list_del(®_beacon
->list
);
2424 list_for_each_entry_safe(reg_beacon
, btmp
, ®_beacon_list
, list
) {
2425 list_del(®_beacon
->list
);
2429 list_for_each_entry_safe(reg_request
, tmp
, ®_requests_list
, list
) {
2430 list_del(®_request
->list
);