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 reset_regdomains(bool full_reset
,
216 const struct ieee80211_regdomain
*new_regdom
)
218 const struct ieee80211_regdomain
*r
;
222 r
= get_cfg80211_regdom();
224 /* avoid freeing static information or freeing something twice */
225 if (r
== cfg80211_world_regdom
)
227 if (cfg80211_world_regdom
== &world_regdom
)
228 cfg80211_world_regdom
= NULL
;
229 if (r
== &world_regdom
)
233 rcu_free_regdom(cfg80211_world_regdom
);
235 cfg80211_world_regdom
= &world_regdom
;
236 rcu_assign_pointer(cfg80211_regdomain
, new_regdom
);
241 reg_kfree_last_request();
242 rcu_assign_pointer(last_request
, &core_request_world
);
246 * Dynamic world regulatory domain requested by the wireless
247 * core upon initialization
249 static void update_world_regdomain(const struct ieee80211_regdomain
*rd
)
251 struct regulatory_request
*lr
;
253 lr
= get_last_request();
257 reset_regdomains(false, rd
);
259 cfg80211_world_regdom
= rd
;
262 bool is_world_regdom(const char *alpha2
)
266 return alpha2
[0] == '0' && alpha2
[1] == '0';
269 static bool is_alpha2_set(const char *alpha2
)
273 return alpha2
[0] && alpha2
[1];
276 static bool is_unknown_alpha2(const char *alpha2
)
281 * Special case where regulatory domain was built by driver
282 * but a specific alpha2 cannot be determined
284 return alpha2
[0] == '9' && alpha2
[1] == '9';
287 static bool is_intersected_alpha2(const char *alpha2
)
292 * Special case where regulatory domain is the
293 * result of an intersection between two regulatory domain
296 return alpha2
[0] == '9' && alpha2
[1] == '8';
299 static bool is_an_alpha2(const char *alpha2
)
303 return isalpha(alpha2
[0]) && isalpha(alpha2
[1]);
306 static bool alpha2_equal(const char *alpha2_x
, const char *alpha2_y
)
308 if (!alpha2_x
|| !alpha2_y
)
310 return alpha2_x
[0] == alpha2_y
[0] && alpha2_x
[1] == alpha2_y
[1];
313 static bool regdom_changes(const char *alpha2
)
315 const struct ieee80211_regdomain
*r
= get_cfg80211_regdom();
319 return !alpha2_equal(r
->alpha2
, alpha2
);
323 * The NL80211_REGDOM_SET_BY_USER regdom alpha2 is cached, this lets
324 * you know if a valid regulatory hint with NL80211_REGDOM_SET_BY_USER
325 * has ever been issued.
327 static bool is_user_regdom_saved(void)
329 if (user_alpha2
[0] == '9' && user_alpha2
[1] == '7')
332 /* This would indicate a mistake on the design */
333 if (WARN(!is_world_regdom(user_alpha2
) && !is_an_alpha2(user_alpha2
),
334 "Unexpected user alpha2: %c%c\n",
335 user_alpha2
[0], user_alpha2
[1]))
341 static const struct ieee80211_regdomain
*
342 reg_copy_regd(const struct ieee80211_regdomain
*src_regd
)
344 struct ieee80211_regdomain
*regd
;
349 sizeof(struct ieee80211_regdomain
) +
350 src_regd
->n_reg_rules
* sizeof(struct ieee80211_reg_rule
);
352 regd
= kzalloc(size_of_regd
, GFP_KERNEL
);
354 return ERR_PTR(-ENOMEM
);
356 memcpy(regd
, src_regd
, sizeof(struct ieee80211_regdomain
));
358 for (i
= 0; i
< src_regd
->n_reg_rules
; i
++)
359 memcpy(®d
->reg_rules
[i
], &src_regd
->reg_rules
[i
],
360 sizeof(struct ieee80211_reg_rule
));
365 #ifdef CONFIG_CFG80211_INTERNAL_REGDB
366 struct reg_regdb_search_request
{
368 struct list_head list
;
371 static LIST_HEAD(reg_regdb_search_list
);
372 static DEFINE_MUTEX(reg_regdb_search_mutex
);
374 static void reg_regdb_search(struct work_struct
*work
)
376 struct reg_regdb_search_request
*request
;
377 const struct ieee80211_regdomain
*curdom
, *regdom
= NULL
;
382 mutex_lock(®_regdb_search_mutex
);
383 while (!list_empty(®_regdb_search_list
)) {
384 request
= list_first_entry(®_regdb_search_list
,
385 struct reg_regdb_search_request
,
387 list_del(&request
->list
);
389 for (i
= 0; i
< reg_regdb_size
; i
++) {
390 curdom
= reg_regdb
[i
];
392 if (alpha2_equal(request
->alpha2
, curdom
->alpha2
)) {
393 regdom
= reg_copy_regd(curdom
);
400 mutex_unlock(®_regdb_search_mutex
);
402 if (!IS_ERR_OR_NULL(regdom
))
408 static DECLARE_WORK(reg_regdb_work
, reg_regdb_search
);
410 static void reg_regdb_query(const char *alpha2
)
412 struct reg_regdb_search_request
*request
;
417 request
= kzalloc(sizeof(struct reg_regdb_search_request
), GFP_KERNEL
);
421 memcpy(request
->alpha2
, alpha2
, 2);
423 mutex_lock(®_regdb_search_mutex
);
424 list_add_tail(&request
->list
, ®_regdb_search_list
);
425 mutex_unlock(®_regdb_search_mutex
);
427 schedule_work(®_regdb_work
);
430 /* Feel free to add any other sanity checks here */
431 static void reg_regdb_size_check(void)
433 /* We should ideally BUILD_BUG_ON() but then random builds would fail */
434 WARN_ONCE(!reg_regdb_size
, "db.txt is empty, you should update it...");
437 static inline void reg_regdb_size_check(void) {}
438 static inline void reg_regdb_query(const char *alpha2
) {}
439 #endif /* CONFIG_CFG80211_INTERNAL_REGDB */
442 * This lets us keep regulatory code which is updated on a regulatory
443 * basis in userspace. Country information is filled in by
446 static int call_crda(const char *alpha2
)
448 if (!is_world_regdom((char *) alpha2
))
449 pr_info("Calling CRDA for country: %c%c\n",
450 alpha2
[0], alpha2
[1]);
452 pr_info("Calling CRDA to update world regulatory domain\n");
454 /* query internal regulatory database (if it exists) */
455 reg_regdb_query(alpha2
);
457 return kobject_uevent(®_pdev
->dev
.kobj
, KOBJ_CHANGE
);
460 bool reg_is_valid_request(const char *alpha2
)
462 struct regulatory_request
*lr
= get_last_request();
464 if (!lr
|| lr
->processed
)
467 return alpha2_equal(lr
->alpha2
, alpha2
);
470 /* Sanity check on a regulatory rule */
471 static bool is_valid_reg_rule(const struct ieee80211_reg_rule
*rule
)
473 const struct ieee80211_freq_range
*freq_range
= &rule
->freq_range
;
476 if (freq_range
->start_freq_khz
<= 0 || freq_range
->end_freq_khz
<= 0)
479 if (freq_range
->start_freq_khz
> freq_range
->end_freq_khz
)
482 freq_diff
= freq_range
->end_freq_khz
- freq_range
->start_freq_khz
;
484 if (freq_range
->end_freq_khz
<= freq_range
->start_freq_khz
||
485 freq_range
->max_bandwidth_khz
> freq_diff
)
491 static bool is_valid_rd(const struct ieee80211_regdomain
*rd
)
493 const struct ieee80211_reg_rule
*reg_rule
= NULL
;
496 if (!rd
->n_reg_rules
)
499 if (WARN_ON(rd
->n_reg_rules
> NL80211_MAX_SUPP_REG_RULES
))
502 for (i
= 0; i
< rd
->n_reg_rules
; i
++) {
503 reg_rule
= &rd
->reg_rules
[i
];
504 if (!is_valid_reg_rule(reg_rule
))
511 static bool reg_does_bw_fit(const struct ieee80211_freq_range
*freq_range
,
512 u32 center_freq_khz
, u32 bw_khz
)
514 u32 start_freq_khz
, end_freq_khz
;
516 start_freq_khz
= center_freq_khz
- (bw_khz
/2);
517 end_freq_khz
= center_freq_khz
+ (bw_khz
/2);
519 if (start_freq_khz
>= freq_range
->start_freq_khz
&&
520 end_freq_khz
<= freq_range
->end_freq_khz
)
527 * freq_in_rule_band - tells us if a frequency is in a frequency band
528 * @freq_range: frequency rule we want to query
529 * @freq_khz: frequency we are inquiring about
531 * This lets us know if a specific frequency rule is or is not relevant to
532 * a specific frequency's band. Bands are device specific and artificial
533 * definitions (the "2.4 GHz band", the "5 GHz band" and the "60GHz band"),
534 * however it is safe for now to assume that a frequency rule should not be
535 * part of a frequency's band if the start freq or end freq are off by more
536 * than 2 GHz for the 2.4 and 5 GHz bands, and by more than 10 GHz for the
538 * This resolution can be lowered and should be considered as we add
539 * regulatory rule support for other "bands".
541 static bool freq_in_rule_band(const struct ieee80211_freq_range
*freq_range
,
544 #define ONE_GHZ_IN_KHZ 1000000
546 * From 802.11ad: directional multi-gigabit (DMG):
547 * Pertaining to operation in a frequency band containing a channel
548 * with the Channel starting frequency above 45 GHz.
550 u32 limit
= freq_khz
> 45 * ONE_GHZ_IN_KHZ
?
551 10 * ONE_GHZ_IN_KHZ
: 2 * ONE_GHZ_IN_KHZ
;
552 if (abs(freq_khz
- freq_range
->start_freq_khz
) <= limit
)
554 if (abs(freq_khz
- freq_range
->end_freq_khz
) <= limit
)
557 #undef ONE_GHZ_IN_KHZ
561 * Helper for regdom_intersect(), this does the real
562 * mathematical intersection fun
564 static int reg_rules_intersect(const struct ieee80211_reg_rule
*rule1
,
565 const struct ieee80211_reg_rule
*rule2
,
566 struct ieee80211_reg_rule
*intersected_rule
)
568 const struct ieee80211_freq_range
*freq_range1
, *freq_range2
;
569 struct ieee80211_freq_range
*freq_range
;
570 const struct ieee80211_power_rule
*power_rule1
, *power_rule2
;
571 struct ieee80211_power_rule
*power_rule
;
574 freq_range1
= &rule1
->freq_range
;
575 freq_range2
= &rule2
->freq_range
;
576 freq_range
= &intersected_rule
->freq_range
;
578 power_rule1
= &rule1
->power_rule
;
579 power_rule2
= &rule2
->power_rule
;
580 power_rule
= &intersected_rule
->power_rule
;
582 freq_range
->start_freq_khz
= max(freq_range1
->start_freq_khz
,
583 freq_range2
->start_freq_khz
);
584 freq_range
->end_freq_khz
= min(freq_range1
->end_freq_khz
,
585 freq_range2
->end_freq_khz
);
586 freq_range
->max_bandwidth_khz
= min(freq_range1
->max_bandwidth_khz
,
587 freq_range2
->max_bandwidth_khz
);
589 freq_diff
= freq_range
->end_freq_khz
- freq_range
->start_freq_khz
;
590 if (freq_range
->max_bandwidth_khz
> freq_diff
)
591 freq_range
->max_bandwidth_khz
= freq_diff
;
593 power_rule
->max_eirp
= min(power_rule1
->max_eirp
,
594 power_rule2
->max_eirp
);
595 power_rule
->max_antenna_gain
= min(power_rule1
->max_antenna_gain
,
596 power_rule2
->max_antenna_gain
);
598 intersected_rule
->flags
= rule1
->flags
| rule2
->flags
;
600 if (!is_valid_reg_rule(intersected_rule
))
607 * regdom_intersect - do the intersection between two regulatory domains
608 * @rd1: first regulatory domain
609 * @rd2: second regulatory domain
611 * Use this function to get the intersection between two regulatory domains.
612 * Once completed we will mark the alpha2 for the rd as intersected, "98",
613 * as no one single alpha2 can represent this regulatory domain.
615 * Returns a pointer to the regulatory domain structure which will hold the
616 * resulting intersection of rules between rd1 and rd2. We will
617 * kzalloc() this structure for you.
619 static struct ieee80211_regdomain
*
620 regdom_intersect(const struct ieee80211_regdomain
*rd1
,
621 const struct ieee80211_regdomain
*rd2
)
625 unsigned int num_rules
= 0, rule_idx
= 0;
626 const struct ieee80211_reg_rule
*rule1
, *rule2
;
627 struct ieee80211_reg_rule
*intersected_rule
;
628 struct ieee80211_regdomain
*rd
;
629 /* This is just a dummy holder to help us count */
630 struct ieee80211_reg_rule dummy_rule
;
636 * First we get a count of the rules we'll need, then we actually
637 * build them. This is to so we can malloc() and free() a
638 * regdomain once. The reason we use reg_rules_intersect() here
639 * is it will return -EINVAL if the rule computed makes no sense.
640 * All rules that do check out OK are valid.
643 for (x
= 0; x
< rd1
->n_reg_rules
; x
++) {
644 rule1
= &rd1
->reg_rules
[x
];
645 for (y
= 0; y
< rd2
->n_reg_rules
; y
++) {
646 rule2
= &rd2
->reg_rules
[y
];
647 if (!reg_rules_intersect(rule1
, rule2
, &dummy_rule
))
655 size_of_regd
= sizeof(struct ieee80211_regdomain
) +
656 num_rules
* sizeof(struct ieee80211_reg_rule
);
658 rd
= kzalloc(size_of_regd
, GFP_KERNEL
);
662 for (x
= 0; x
< rd1
->n_reg_rules
&& rule_idx
< num_rules
; x
++) {
663 rule1
= &rd1
->reg_rules
[x
];
664 for (y
= 0; y
< rd2
->n_reg_rules
&& rule_idx
< num_rules
; y
++) {
665 rule2
= &rd2
->reg_rules
[y
];
667 * This time around instead of using the stack lets
668 * write to the target rule directly saving ourselves
671 intersected_rule
= &rd
->reg_rules
[rule_idx
];
672 r
= reg_rules_intersect(rule1
, rule2
, intersected_rule
);
674 * No need to memset here the intersected rule here as
675 * we're not using the stack anymore
683 if (rule_idx
!= num_rules
) {
688 rd
->n_reg_rules
= num_rules
;
696 * XXX: add support for the rest of enum nl80211_reg_rule_flags, we may
697 * want to just have the channel structure use these
699 static u32
map_regdom_flags(u32 rd_flags
)
701 u32 channel_flags
= 0;
702 if (rd_flags
& NL80211_RRF_NO_IR_ALL
)
703 channel_flags
|= IEEE80211_CHAN_NO_IR
;
704 if (rd_flags
& NL80211_RRF_DFS
)
705 channel_flags
|= IEEE80211_CHAN_RADAR
;
706 if (rd_flags
& NL80211_RRF_NO_OFDM
)
707 channel_flags
|= IEEE80211_CHAN_NO_OFDM
;
708 return channel_flags
;
711 static const struct ieee80211_reg_rule
*
712 freq_reg_info_regd(struct wiphy
*wiphy
, u32 center_freq
,
713 const struct ieee80211_regdomain
*regd
)
716 bool band_rule_found
= false;
717 bool bw_fits
= false;
720 return ERR_PTR(-EINVAL
);
722 for (i
= 0; i
< regd
->n_reg_rules
; i
++) {
723 const struct ieee80211_reg_rule
*rr
;
724 const struct ieee80211_freq_range
*fr
= NULL
;
726 rr
= ®d
->reg_rules
[i
];
727 fr
= &rr
->freq_range
;
730 * We only need to know if one frequency rule was
731 * was in center_freq's band, that's enough, so lets
732 * not overwrite it once found
734 if (!band_rule_found
)
735 band_rule_found
= freq_in_rule_band(fr
, center_freq
);
737 bw_fits
= reg_does_bw_fit(fr
, center_freq
, MHZ_TO_KHZ(20));
739 if (band_rule_found
&& bw_fits
)
743 if (!band_rule_found
)
744 return ERR_PTR(-ERANGE
);
746 return ERR_PTR(-EINVAL
);
749 const struct ieee80211_reg_rule
*freq_reg_info(struct wiphy
*wiphy
,
752 const struct ieee80211_regdomain
*regd
;
753 struct regulatory_request
*lr
= get_last_request();
756 * Follow the driver's regulatory domain, if present, unless a country
757 * IE has been processed or a user wants to help complaince further
759 if (lr
->initiator
!= NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
760 lr
->initiator
!= NL80211_REGDOM_SET_BY_USER
&&
762 regd
= get_wiphy_regdom(wiphy
);
764 regd
= get_cfg80211_regdom();
766 return freq_reg_info_regd(wiphy
, center_freq
, regd
);
768 EXPORT_SYMBOL(freq_reg_info
);
770 const char *reg_initiator_name(enum nl80211_reg_initiator initiator
)
773 case NL80211_REGDOM_SET_BY_CORE
:
775 case NL80211_REGDOM_SET_BY_USER
:
777 case NL80211_REGDOM_SET_BY_DRIVER
:
779 case NL80211_REGDOM_SET_BY_COUNTRY_IE
:
786 EXPORT_SYMBOL(reg_initiator_name
);
788 #ifdef CONFIG_CFG80211_REG_DEBUG
789 static void chan_reg_rule_print_dbg(struct ieee80211_channel
*chan
,
790 const struct ieee80211_reg_rule
*reg_rule
)
792 const struct ieee80211_power_rule
*power_rule
;
793 const struct ieee80211_freq_range
*freq_range
;
794 char max_antenna_gain
[32];
796 power_rule
= ®_rule
->power_rule
;
797 freq_range
= ®_rule
->freq_range
;
799 if (!power_rule
->max_antenna_gain
)
800 snprintf(max_antenna_gain
, 32, "N/A");
802 snprintf(max_antenna_gain
, 32, "%d", power_rule
->max_antenna_gain
);
804 REG_DBG_PRINT("Updating information on frequency %d MHz with regulatory rule:\n",
807 REG_DBG_PRINT("%d KHz - %d KHz @ %d KHz), (%s mBi, %d mBm)\n",
808 freq_range
->start_freq_khz
, freq_range
->end_freq_khz
,
809 freq_range
->max_bandwidth_khz
, max_antenna_gain
,
810 power_rule
->max_eirp
);
813 static void chan_reg_rule_print_dbg(struct ieee80211_channel
*chan
,
814 const struct ieee80211_reg_rule
*reg_rule
)
821 * Note that right now we assume the desired channel bandwidth
822 * is always 20 MHz for each individual channel (HT40 uses 20 MHz
823 * per channel, the primary and the extension channel).
825 static void handle_channel(struct wiphy
*wiphy
,
826 enum nl80211_reg_initiator initiator
,
827 struct ieee80211_channel
*chan
)
829 u32 flags
, bw_flags
= 0;
830 const struct ieee80211_reg_rule
*reg_rule
= NULL
;
831 const struct ieee80211_power_rule
*power_rule
= NULL
;
832 const struct ieee80211_freq_range
*freq_range
= NULL
;
833 struct wiphy
*request_wiphy
= NULL
;
834 struct regulatory_request
*lr
= get_last_request();
836 request_wiphy
= wiphy_idx_to_wiphy(lr
->wiphy_idx
);
838 flags
= chan
->orig_flags
;
840 reg_rule
= freq_reg_info(wiphy
, MHZ_TO_KHZ(chan
->center_freq
));
841 if (IS_ERR(reg_rule
)) {
843 * We will disable all channels that do not match our
844 * received regulatory rule unless the hint is coming
845 * from a Country IE and the Country IE had no information
846 * about a band. The IEEE 802.11 spec allows for an AP
847 * to send only a subset of the regulatory rules allowed,
848 * so an AP in the US that only supports 2.4 GHz may only send
849 * a country IE with information for the 2.4 GHz band
850 * while 5 GHz is still supported.
852 if (initiator
== NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
853 PTR_ERR(reg_rule
) == -ERANGE
)
856 if (lr
->initiator
== NL80211_REGDOM_SET_BY_DRIVER
&&
857 request_wiphy
&& request_wiphy
== wiphy
&&
858 request_wiphy
->flags
& WIPHY_FLAG_STRICT_REGULATORY
) {
859 REG_DBG_PRINT("Disabling freq %d MHz for good\n",
861 chan
->orig_flags
|= IEEE80211_CHAN_DISABLED
;
862 chan
->flags
= chan
->orig_flags
;
864 REG_DBG_PRINT("Disabling freq %d MHz\n",
866 chan
->flags
|= IEEE80211_CHAN_DISABLED
;
871 chan_reg_rule_print_dbg(chan
, reg_rule
);
873 power_rule
= ®_rule
->power_rule
;
874 freq_range
= ®_rule
->freq_range
;
876 if (freq_range
->max_bandwidth_khz
< MHZ_TO_KHZ(40))
877 bw_flags
= IEEE80211_CHAN_NO_HT40
;
878 if (freq_range
->max_bandwidth_khz
< MHZ_TO_KHZ(80))
879 bw_flags
|= IEEE80211_CHAN_NO_80MHZ
;
880 if (freq_range
->max_bandwidth_khz
< MHZ_TO_KHZ(160))
881 bw_flags
|= IEEE80211_CHAN_NO_160MHZ
;
883 if (lr
->initiator
== NL80211_REGDOM_SET_BY_DRIVER
&&
884 request_wiphy
&& request_wiphy
== wiphy
&&
885 request_wiphy
->flags
& WIPHY_FLAG_STRICT_REGULATORY
) {
887 * This guarantees the driver's requested regulatory domain
888 * will always be used as a base for further regulatory
891 chan
->flags
= chan
->orig_flags
=
892 map_regdom_flags(reg_rule
->flags
) | bw_flags
;
893 chan
->max_antenna_gain
= chan
->orig_mag
=
894 (int) MBI_TO_DBI(power_rule
->max_antenna_gain
);
895 chan
->max_reg_power
= chan
->max_power
= chan
->orig_mpwr
=
896 (int) MBM_TO_DBM(power_rule
->max_eirp
);
900 chan
->dfs_state
= NL80211_DFS_USABLE
;
901 chan
->dfs_state_entered
= jiffies
;
903 chan
->beacon_found
= false;
904 chan
->flags
= flags
| bw_flags
| map_regdom_flags(reg_rule
->flags
);
905 chan
->max_antenna_gain
=
906 min_t(int, chan
->orig_mag
,
907 MBI_TO_DBI(power_rule
->max_antenna_gain
));
908 chan
->max_reg_power
= (int) MBM_TO_DBM(power_rule
->max_eirp
);
909 if (chan
->orig_mpwr
) {
911 * Devices that have their own custom regulatory domain
912 * but also use WIPHY_FLAG_STRICT_REGULATORY will follow the
913 * passed country IE power settings.
915 if (initiator
== NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
916 wiphy
->flags
& WIPHY_FLAG_CUSTOM_REGULATORY
&&
917 wiphy
->flags
& WIPHY_FLAG_STRICT_REGULATORY
)
918 chan
->max_power
= chan
->max_reg_power
;
920 chan
->max_power
= min(chan
->orig_mpwr
,
921 chan
->max_reg_power
);
923 chan
->max_power
= chan
->max_reg_power
;
926 static void handle_band(struct wiphy
*wiphy
,
927 enum nl80211_reg_initiator initiator
,
928 struct ieee80211_supported_band
*sband
)
935 for (i
= 0; i
< sband
->n_channels
; i
++)
936 handle_channel(wiphy
, initiator
, &sband
->channels
[i
]);
939 static bool reg_request_cell_base(struct regulatory_request
*request
)
941 if (request
->initiator
!= NL80211_REGDOM_SET_BY_USER
)
943 return request
->user_reg_hint_type
== NL80211_USER_REG_HINT_CELL_BASE
;
946 bool reg_last_request_cell_base(void)
948 return reg_request_cell_base(get_last_request());
951 #ifdef CONFIG_CFG80211_CERTIFICATION_ONUS
952 /* Core specific check */
953 static enum reg_request_treatment
954 reg_ignore_cell_hint(struct regulatory_request
*pending_request
)
956 struct regulatory_request
*lr
= get_last_request();
958 if (!reg_num_devs_support_basehint
)
959 return REG_REQ_IGNORE
;
961 if (reg_request_cell_base(lr
) &&
962 !regdom_changes(pending_request
->alpha2
))
963 return REG_REQ_ALREADY_SET
;
968 /* Device specific check */
969 static bool reg_dev_ignore_cell_hint(struct wiphy
*wiphy
)
971 return !(wiphy
->features
& NL80211_FEATURE_CELL_BASE_REG_HINTS
);
974 static int reg_ignore_cell_hint(struct regulatory_request
*pending_request
)
976 return REG_REQ_IGNORE
;
979 static bool reg_dev_ignore_cell_hint(struct wiphy
*wiphy
)
985 static bool wiphy_strict_alpha2_regd(struct wiphy
*wiphy
)
987 if (wiphy
->flags
& WIPHY_FLAG_STRICT_REGULATORY
&&
988 !(wiphy
->flags
& WIPHY_FLAG_CUSTOM_REGULATORY
))
993 static bool ignore_reg_update(struct wiphy
*wiphy
,
994 enum nl80211_reg_initiator initiator
)
996 struct regulatory_request
*lr
= get_last_request();
999 REG_DBG_PRINT("Ignoring regulatory request set by %s "
1000 "since last_request is not set\n",
1001 reg_initiator_name(initiator
));
1005 if (initiator
== NL80211_REGDOM_SET_BY_CORE
&&
1006 wiphy
->flags
& WIPHY_FLAG_CUSTOM_REGULATORY
) {
1007 REG_DBG_PRINT("Ignoring regulatory request set by %s "
1008 "since the driver uses its own custom "
1009 "regulatory domain\n",
1010 reg_initiator_name(initiator
));
1015 * wiphy->regd will be set once the device has its own
1016 * desired regulatory domain set
1018 if (wiphy_strict_alpha2_regd(wiphy
) && !wiphy
->regd
&&
1019 initiator
!= NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
1020 !is_world_regdom(lr
->alpha2
)) {
1021 REG_DBG_PRINT("Ignoring regulatory request set by %s "
1022 "since the driver requires its own regulatory "
1023 "domain to be set first\n",
1024 reg_initiator_name(initiator
));
1028 if (reg_request_cell_base(lr
))
1029 return reg_dev_ignore_cell_hint(wiphy
);
1034 static bool reg_is_world_roaming(struct wiphy
*wiphy
)
1036 const struct ieee80211_regdomain
*cr
= get_cfg80211_regdom();
1037 const struct ieee80211_regdomain
*wr
= get_wiphy_regdom(wiphy
);
1038 struct regulatory_request
*lr
= get_last_request();
1040 if (is_world_regdom(cr
->alpha2
) || (wr
&& is_world_regdom(wr
->alpha2
)))
1043 if (lr
&& lr
->initiator
!= NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
1044 wiphy
->flags
& WIPHY_FLAG_CUSTOM_REGULATORY
)
1050 static void handle_reg_beacon(struct wiphy
*wiphy
, unsigned int chan_idx
,
1051 struct reg_beacon
*reg_beacon
)
1053 struct ieee80211_supported_band
*sband
;
1054 struct ieee80211_channel
*chan
;
1055 bool channel_changed
= false;
1056 struct ieee80211_channel chan_before
;
1058 sband
= wiphy
->bands
[reg_beacon
->chan
.band
];
1059 chan
= &sband
->channels
[chan_idx
];
1061 if (likely(chan
->center_freq
!= reg_beacon
->chan
.center_freq
))
1064 if (chan
->beacon_found
)
1067 chan
->beacon_found
= true;
1069 if (!reg_is_world_roaming(wiphy
))
1072 if (wiphy
->flags
& WIPHY_FLAG_DISABLE_BEACON_HINTS
)
1075 chan_before
.center_freq
= chan
->center_freq
;
1076 chan_before
.flags
= chan
->flags
;
1078 if (chan
->flags
& IEEE80211_CHAN_NO_IR
) {
1079 chan
->flags
&= ~IEEE80211_CHAN_NO_IR
;
1080 channel_changed
= true;
1083 if (channel_changed
)
1084 nl80211_send_beacon_hint_event(wiphy
, &chan_before
, chan
);
1088 * Called when a scan on a wiphy finds a beacon on
1091 static void wiphy_update_new_beacon(struct wiphy
*wiphy
,
1092 struct reg_beacon
*reg_beacon
)
1095 struct ieee80211_supported_band
*sband
;
1097 if (!wiphy
->bands
[reg_beacon
->chan
.band
])
1100 sband
= wiphy
->bands
[reg_beacon
->chan
.band
];
1102 for (i
= 0; i
< sband
->n_channels
; i
++)
1103 handle_reg_beacon(wiphy
, i
, reg_beacon
);
1107 * Called upon reg changes or a new wiphy is added
1109 static void wiphy_update_beacon_reg(struct wiphy
*wiphy
)
1112 struct ieee80211_supported_band
*sband
;
1113 struct reg_beacon
*reg_beacon
;
1115 list_for_each_entry(reg_beacon
, ®_beacon_list
, list
) {
1116 if (!wiphy
->bands
[reg_beacon
->chan
.band
])
1118 sband
= wiphy
->bands
[reg_beacon
->chan
.band
];
1119 for (i
= 0; i
< sband
->n_channels
; i
++)
1120 handle_reg_beacon(wiphy
, i
, reg_beacon
);
1124 /* Reap the advantages of previously found beacons */
1125 static void reg_process_beacons(struct wiphy
*wiphy
)
1128 * Means we are just firing up cfg80211, so no beacons would
1129 * have been processed yet.
1133 wiphy_update_beacon_reg(wiphy
);
1136 static bool is_ht40_allowed(struct ieee80211_channel
*chan
)
1140 if (chan
->flags
& IEEE80211_CHAN_DISABLED
)
1142 /* This would happen when regulatory rules disallow HT40 completely */
1143 if ((chan
->flags
& IEEE80211_CHAN_NO_HT40
) == IEEE80211_CHAN_NO_HT40
)
1148 static void reg_process_ht_flags_channel(struct wiphy
*wiphy
,
1149 struct ieee80211_channel
*channel
)
1151 struct ieee80211_supported_band
*sband
= wiphy
->bands
[channel
->band
];
1152 struct ieee80211_channel
*channel_before
= NULL
, *channel_after
= NULL
;
1155 if (!is_ht40_allowed(channel
)) {
1156 channel
->flags
|= IEEE80211_CHAN_NO_HT40
;
1161 * We need to ensure the extension channels exist to
1162 * be able to use HT40- or HT40+, this finds them (or not)
1164 for (i
= 0; i
< sband
->n_channels
; i
++) {
1165 struct ieee80211_channel
*c
= &sband
->channels
[i
];
1167 if (c
->center_freq
== (channel
->center_freq
- 20))
1169 if (c
->center_freq
== (channel
->center_freq
+ 20))
1174 * Please note that this assumes target bandwidth is 20 MHz,
1175 * if that ever changes we also need to change the below logic
1176 * to include that as well.
1178 if (!is_ht40_allowed(channel_before
))
1179 channel
->flags
|= IEEE80211_CHAN_NO_HT40MINUS
;
1181 channel
->flags
&= ~IEEE80211_CHAN_NO_HT40MINUS
;
1183 if (!is_ht40_allowed(channel_after
))
1184 channel
->flags
|= IEEE80211_CHAN_NO_HT40PLUS
;
1186 channel
->flags
&= ~IEEE80211_CHAN_NO_HT40PLUS
;
1189 static void reg_process_ht_flags_band(struct wiphy
*wiphy
,
1190 struct ieee80211_supported_band
*sband
)
1197 for (i
= 0; i
< sband
->n_channels
; i
++)
1198 reg_process_ht_flags_channel(wiphy
, &sband
->channels
[i
]);
1201 static void reg_process_ht_flags(struct wiphy
*wiphy
)
1203 enum ieee80211_band band
;
1208 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++)
1209 reg_process_ht_flags_band(wiphy
, wiphy
->bands
[band
]);
1212 static void wiphy_update_regulatory(struct wiphy
*wiphy
,
1213 enum nl80211_reg_initiator initiator
)
1215 enum ieee80211_band band
;
1216 struct regulatory_request
*lr
= get_last_request();
1218 if (ignore_reg_update(wiphy
, initiator
))
1221 lr
->dfs_region
= get_cfg80211_regdom()->dfs_region
;
1223 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++)
1224 handle_band(wiphy
, initiator
, wiphy
->bands
[band
]);
1226 reg_process_beacons(wiphy
);
1227 reg_process_ht_flags(wiphy
);
1229 if (wiphy
->reg_notifier
)
1230 wiphy
->reg_notifier(wiphy
, lr
);
1233 static void update_all_wiphy_regulatory(enum nl80211_reg_initiator initiator
)
1235 struct cfg80211_registered_device
*rdev
;
1236 struct wiphy
*wiphy
;
1240 list_for_each_entry(rdev
, &cfg80211_rdev_list
, list
) {
1241 wiphy
= &rdev
->wiphy
;
1242 wiphy_update_regulatory(wiphy
, initiator
);
1244 * Regulatory updates set by CORE are ignored for custom
1245 * regulatory cards. Let us notify the changes to the driver,
1246 * as some drivers used this to restore its orig_* reg domain.
1248 if (initiator
== NL80211_REGDOM_SET_BY_CORE
&&
1249 wiphy
->flags
& WIPHY_FLAG_CUSTOM_REGULATORY
&&
1250 wiphy
->reg_notifier
)
1251 wiphy
->reg_notifier(wiphy
, get_last_request());
1255 static void handle_channel_custom(struct wiphy
*wiphy
,
1256 struct ieee80211_channel
*chan
,
1257 const struct ieee80211_regdomain
*regd
)
1260 const struct ieee80211_reg_rule
*reg_rule
= NULL
;
1261 const struct ieee80211_power_rule
*power_rule
= NULL
;
1262 const struct ieee80211_freq_range
*freq_range
= NULL
;
1264 reg_rule
= freq_reg_info_regd(wiphy
, MHZ_TO_KHZ(chan
->center_freq
),
1267 if (IS_ERR(reg_rule
)) {
1268 REG_DBG_PRINT("Disabling freq %d MHz as custom regd has no rule that fits it\n",
1270 chan
->orig_flags
|= IEEE80211_CHAN_DISABLED
;
1271 chan
->flags
= chan
->orig_flags
;
1275 chan_reg_rule_print_dbg(chan
, reg_rule
);
1277 power_rule
= ®_rule
->power_rule
;
1278 freq_range
= ®_rule
->freq_range
;
1280 if (freq_range
->max_bandwidth_khz
< MHZ_TO_KHZ(40))
1281 bw_flags
= IEEE80211_CHAN_NO_HT40
;
1282 if (freq_range
->max_bandwidth_khz
< MHZ_TO_KHZ(80))
1283 bw_flags
|= IEEE80211_CHAN_NO_80MHZ
;
1284 if (freq_range
->max_bandwidth_khz
< MHZ_TO_KHZ(160))
1285 bw_flags
|= IEEE80211_CHAN_NO_160MHZ
;
1287 chan
->flags
|= map_regdom_flags(reg_rule
->flags
) | bw_flags
;
1288 chan
->max_antenna_gain
= (int) MBI_TO_DBI(power_rule
->max_antenna_gain
);
1289 chan
->max_reg_power
= chan
->max_power
=
1290 (int) MBM_TO_DBM(power_rule
->max_eirp
);
1293 static void handle_band_custom(struct wiphy
*wiphy
,
1294 struct ieee80211_supported_band
*sband
,
1295 const struct ieee80211_regdomain
*regd
)
1302 for (i
= 0; i
< sband
->n_channels
; i
++)
1303 handle_channel_custom(wiphy
, &sband
->channels
[i
], regd
);
1306 /* Used by drivers prior to wiphy registration */
1307 void wiphy_apply_custom_regulatory(struct wiphy
*wiphy
,
1308 const struct ieee80211_regdomain
*regd
)
1310 enum ieee80211_band band
;
1311 unsigned int bands_set
= 0;
1313 WARN(!(wiphy
->flags
& WIPHY_FLAG_CUSTOM_REGULATORY
),
1314 "wiphy should have WIPHY_FLAG_CUSTOM_REGULATORY\n");
1315 wiphy
->flags
|= WIPHY_FLAG_CUSTOM_REGULATORY
;
1317 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++) {
1318 if (!wiphy
->bands
[band
])
1320 handle_band_custom(wiphy
, wiphy
->bands
[band
], regd
);
1325 * no point in calling this if it won't have any effect
1326 * on your device's supported bands.
1328 WARN_ON(!bands_set
);
1330 EXPORT_SYMBOL(wiphy_apply_custom_regulatory
);
1332 static void reg_set_request_processed(void)
1334 bool need_more_processing
= false;
1335 struct regulatory_request
*lr
= get_last_request();
1337 lr
->processed
= true;
1339 spin_lock(®_requests_lock
);
1340 if (!list_empty(®_requests_list
))
1341 need_more_processing
= true;
1342 spin_unlock(®_requests_lock
);
1344 if (lr
->initiator
== NL80211_REGDOM_SET_BY_USER
)
1345 cancel_delayed_work(®_timeout
);
1347 if (need_more_processing
)
1348 schedule_work(®_work
);
1352 * reg_process_hint_core - process core regulatory requests
1353 * @pending_request: a pending core regulatory request
1355 * The wireless subsystem can use this function to process
1356 * a regulatory request issued by the regulatory core.
1358 * Returns one of the different reg request treatment values.
1360 static enum reg_request_treatment
1361 reg_process_hint_core(struct regulatory_request
*core_request
)
1364 core_request
->intersect
= false;
1365 core_request
->processed
= false;
1367 reg_kfree_last_request();
1368 rcu_assign_pointer(last_request
, core_request
);
1370 if (call_crda(core_request
->alpha2
))
1371 return REG_REQ_IGNORE
;
1375 static enum reg_request_treatment
1376 __reg_process_hint_user(struct regulatory_request
*user_request
)
1378 struct regulatory_request
*lr
= get_last_request();
1380 if (reg_request_cell_base(user_request
))
1381 return reg_ignore_cell_hint(user_request
);
1383 if (reg_request_cell_base(lr
))
1384 return REG_REQ_IGNORE
;
1386 if (lr
->initiator
== NL80211_REGDOM_SET_BY_COUNTRY_IE
)
1387 return REG_REQ_INTERSECT
;
1389 * If the user knows better the user should set the regdom
1390 * to their country before the IE is picked up
1392 if (lr
->initiator
== NL80211_REGDOM_SET_BY_USER
&&
1394 return REG_REQ_IGNORE
;
1396 * Process user requests only after previous user/driver/core
1397 * requests have been processed
1399 if ((lr
->initiator
== NL80211_REGDOM_SET_BY_CORE
||
1400 lr
->initiator
== NL80211_REGDOM_SET_BY_DRIVER
||
1401 lr
->initiator
== NL80211_REGDOM_SET_BY_USER
) &&
1402 regdom_changes(lr
->alpha2
))
1403 return REG_REQ_IGNORE
;
1405 if (!regdom_changes(user_request
->alpha2
))
1406 return REG_REQ_ALREADY_SET
;
1412 * reg_process_hint_user - process user regulatory requests
1413 * @user_request: a pending user regulatory request
1415 * The wireless subsystem can use this function to process
1416 * a regulatory request initiated by userspace.
1418 * Returns one of the different reg request treatment values.
1420 static enum reg_request_treatment
1421 reg_process_hint_user(struct regulatory_request
*user_request
)
1423 enum reg_request_treatment treatment
;
1425 treatment
= __reg_process_hint_user(user_request
);
1426 if (treatment
== REG_REQ_IGNORE
||
1427 treatment
== REG_REQ_ALREADY_SET
) {
1428 kfree(user_request
);
1432 user_request
->intersect
= treatment
== REG_REQ_INTERSECT
;
1433 user_request
->processed
= false;
1435 reg_kfree_last_request();
1436 rcu_assign_pointer(last_request
, user_request
);
1438 user_alpha2
[0] = user_request
->alpha2
[0];
1439 user_alpha2
[1] = user_request
->alpha2
[1];
1441 if (call_crda(user_request
->alpha2
))
1442 return REG_REQ_IGNORE
;
1446 static enum reg_request_treatment
1447 __reg_process_hint_driver(struct regulatory_request
*driver_request
)
1449 struct regulatory_request
*lr
= get_last_request();
1451 if (lr
->initiator
== NL80211_REGDOM_SET_BY_CORE
) {
1452 if (regdom_changes(driver_request
->alpha2
))
1454 return REG_REQ_ALREADY_SET
;
1458 * This would happen if you unplug and plug your card
1459 * back in or if you add a new device for which the previously
1460 * loaded card also agrees on the regulatory domain.
1462 if (lr
->initiator
== NL80211_REGDOM_SET_BY_DRIVER
&&
1463 !regdom_changes(driver_request
->alpha2
))
1464 return REG_REQ_ALREADY_SET
;
1466 return REG_REQ_INTERSECT
;
1470 * reg_process_hint_driver - process driver regulatory requests
1471 * @driver_request: a pending driver regulatory request
1473 * The wireless subsystem can use this function to process
1474 * a regulatory request issued by an 802.11 driver.
1476 * Returns one of the different reg request treatment values.
1478 static enum reg_request_treatment
1479 reg_process_hint_driver(struct wiphy
*wiphy
,
1480 struct regulatory_request
*driver_request
)
1482 const struct ieee80211_regdomain
*regd
;
1483 enum reg_request_treatment treatment
;
1485 treatment
= __reg_process_hint_driver(driver_request
);
1487 switch (treatment
) {
1490 case REG_REQ_IGNORE
:
1491 kfree(driver_request
);
1493 case REG_REQ_INTERSECT
:
1495 case REG_REQ_ALREADY_SET
:
1496 regd
= reg_copy_regd(get_cfg80211_regdom());
1498 kfree(driver_request
);
1499 return REG_REQ_IGNORE
;
1501 rcu_assign_pointer(wiphy
->regd
, regd
);
1505 driver_request
->intersect
= treatment
== REG_REQ_INTERSECT
;
1506 driver_request
->processed
= false;
1508 reg_kfree_last_request();
1509 rcu_assign_pointer(last_request
, driver_request
);
1512 * Since CRDA will not be called in this case as we already
1513 * have applied the requested regulatory domain before we just
1514 * inform userspace we have processed the request
1516 if (treatment
== REG_REQ_ALREADY_SET
) {
1517 nl80211_send_reg_change_event(driver_request
);
1518 reg_set_request_processed();
1522 if (call_crda(driver_request
->alpha2
))
1523 return REG_REQ_IGNORE
;
1527 static enum reg_request_treatment
1528 __reg_process_hint_country_ie(struct wiphy
*wiphy
,
1529 struct regulatory_request
*country_ie_request
)
1531 struct wiphy
*last_wiphy
= NULL
;
1532 struct regulatory_request
*lr
= get_last_request();
1534 if (reg_request_cell_base(lr
)) {
1535 /* Trust a Cell base station over the AP's country IE */
1536 if (regdom_changes(country_ie_request
->alpha2
))
1537 return REG_REQ_IGNORE
;
1538 return REG_REQ_ALREADY_SET
;
1541 if (unlikely(!is_an_alpha2(country_ie_request
->alpha2
)))
1544 if (lr
->initiator
!= NL80211_REGDOM_SET_BY_COUNTRY_IE
)
1547 last_wiphy
= wiphy_idx_to_wiphy(lr
->wiphy_idx
);
1549 if (last_wiphy
!= wiphy
) {
1551 * Two cards with two APs claiming different
1552 * Country IE alpha2s. We could
1553 * intersect them, but that seems unlikely
1554 * to be correct. Reject second one for now.
1556 if (regdom_changes(country_ie_request
->alpha2
))
1557 return REG_REQ_IGNORE
;
1558 return REG_REQ_ALREADY_SET
;
1561 * Two consecutive Country IE hints on the same wiphy.
1562 * This should be picked up early by the driver/stack
1564 if (WARN_ON(regdom_changes(country_ie_request
->alpha2
)))
1566 return REG_REQ_ALREADY_SET
;
1570 * reg_process_hint_country_ie - process regulatory requests from country IEs
1571 * @country_ie_request: a regulatory request from a country IE
1573 * The wireless subsystem can use this function to process
1574 * a regulatory request issued by a country Information Element.
1576 * Returns one of the different reg request treatment values.
1578 static enum reg_request_treatment
1579 reg_process_hint_country_ie(struct wiphy
*wiphy
,
1580 struct regulatory_request
*country_ie_request
)
1582 enum reg_request_treatment treatment
;
1584 treatment
= __reg_process_hint_country_ie(wiphy
, country_ie_request
);
1586 switch (treatment
) {
1589 case REG_REQ_IGNORE
:
1591 case REG_REQ_ALREADY_SET
:
1592 kfree(country_ie_request
);
1594 case REG_REQ_INTERSECT
:
1595 kfree(country_ie_request
);
1597 * This doesn't happen yet, not sure we
1598 * ever want to support it for this case.
1600 WARN_ONCE(1, "Unexpected intersection for country IEs");
1601 return REG_REQ_IGNORE
;
1604 country_ie_request
->intersect
= false;
1605 country_ie_request
->processed
= false;
1607 reg_kfree_last_request();
1608 rcu_assign_pointer(last_request
, country_ie_request
);
1610 if (call_crda(country_ie_request
->alpha2
))
1611 return REG_REQ_IGNORE
;
1615 /* This processes *all* regulatory hints */
1616 static void reg_process_hint(struct regulatory_request
*reg_request
)
1618 struct wiphy
*wiphy
= NULL
;
1619 enum reg_request_treatment treatment
;
1621 if (WARN_ON(!reg_request
->alpha2
))
1624 if (reg_request
->wiphy_idx
!= WIPHY_IDX_INVALID
)
1625 wiphy
= wiphy_idx_to_wiphy(reg_request
->wiphy_idx
);
1627 if (reg_request
->initiator
== NL80211_REGDOM_SET_BY_DRIVER
&& !wiphy
) {
1632 switch (reg_request
->initiator
) {
1633 case NL80211_REGDOM_SET_BY_CORE
:
1634 reg_process_hint_core(reg_request
);
1636 case NL80211_REGDOM_SET_BY_USER
:
1637 treatment
= reg_process_hint_user(reg_request
);
1638 if (treatment
== REG_REQ_OK
||
1639 treatment
== REG_REQ_ALREADY_SET
)
1641 schedule_delayed_work(®_timeout
, msecs_to_jiffies(3142));
1643 case NL80211_REGDOM_SET_BY_DRIVER
:
1644 treatment
= reg_process_hint_driver(wiphy
, reg_request
);
1646 case NL80211_REGDOM_SET_BY_COUNTRY_IE
:
1647 treatment
= reg_process_hint_country_ie(wiphy
, reg_request
);
1650 WARN(1, "invalid initiator %d\n", reg_request
->initiator
);
1654 /* This is required so that the orig_* parameters are saved */
1655 if (treatment
== REG_REQ_ALREADY_SET
&& wiphy
&&
1656 wiphy
->flags
& WIPHY_FLAG_STRICT_REGULATORY
)
1657 wiphy_update_regulatory(wiphy
, reg_request
->initiator
);
1661 * Processes regulatory hints, this is all the NL80211_REGDOM_SET_BY_*
1662 * Regulatory hints come on a first come first serve basis and we
1663 * must process each one atomically.
1665 static void reg_process_pending_hints(void)
1667 struct regulatory_request
*reg_request
, *lr
;
1669 lr
= get_last_request();
1671 /* When last_request->processed becomes true this will be rescheduled */
1672 if (lr
&& !lr
->processed
) {
1673 REG_DBG_PRINT("Pending regulatory request, waiting for it to be processed...\n");
1677 spin_lock(®_requests_lock
);
1679 if (list_empty(®_requests_list
)) {
1680 spin_unlock(®_requests_lock
);
1684 reg_request
= list_first_entry(®_requests_list
,
1685 struct regulatory_request
,
1687 list_del_init(®_request
->list
);
1689 spin_unlock(®_requests_lock
);
1691 reg_process_hint(reg_request
);
1694 /* Processes beacon hints -- this has nothing to do with country IEs */
1695 static void reg_process_pending_beacon_hints(void)
1697 struct cfg80211_registered_device
*rdev
;
1698 struct reg_beacon
*pending_beacon
, *tmp
;
1700 /* This goes through the _pending_ beacon list */
1701 spin_lock_bh(®_pending_beacons_lock
);
1703 list_for_each_entry_safe(pending_beacon
, tmp
,
1704 ®_pending_beacons
, list
) {
1705 list_del_init(&pending_beacon
->list
);
1707 /* Applies the beacon hint to current wiphys */
1708 list_for_each_entry(rdev
, &cfg80211_rdev_list
, list
)
1709 wiphy_update_new_beacon(&rdev
->wiphy
, pending_beacon
);
1711 /* Remembers the beacon hint for new wiphys or reg changes */
1712 list_add_tail(&pending_beacon
->list
, ®_beacon_list
);
1715 spin_unlock_bh(®_pending_beacons_lock
);
1718 static void reg_todo(struct work_struct
*work
)
1721 reg_process_pending_hints();
1722 reg_process_pending_beacon_hints();
1726 static void queue_regulatory_request(struct regulatory_request
*request
)
1728 request
->alpha2
[0] = toupper(request
->alpha2
[0]);
1729 request
->alpha2
[1] = toupper(request
->alpha2
[1]);
1731 spin_lock(®_requests_lock
);
1732 list_add_tail(&request
->list
, ®_requests_list
);
1733 spin_unlock(®_requests_lock
);
1735 schedule_work(®_work
);
1739 * Core regulatory hint -- happens during cfg80211_init()
1740 * and when we restore regulatory settings.
1742 static int regulatory_hint_core(const char *alpha2
)
1744 struct regulatory_request
*request
;
1746 request
= kzalloc(sizeof(struct regulatory_request
), GFP_KERNEL
);
1750 request
->alpha2
[0] = alpha2
[0];
1751 request
->alpha2
[1] = alpha2
[1];
1752 request
->initiator
= NL80211_REGDOM_SET_BY_CORE
;
1754 queue_regulatory_request(request
);
1760 int regulatory_hint_user(const char *alpha2
,
1761 enum nl80211_user_reg_hint_type user_reg_hint_type
)
1763 struct regulatory_request
*request
;
1765 if (WARN_ON(!alpha2
))
1768 request
= kzalloc(sizeof(struct regulatory_request
), GFP_KERNEL
);
1772 request
->wiphy_idx
= WIPHY_IDX_INVALID
;
1773 request
->alpha2
[0] = alpha2
[0];
1774 request
->alpha2
[1] = alpha2
[1];
1775 request
->initiator
= NL80211_REGDOM_SET_BY_USER
;
1776 request
->user_reg_hint_type
= user_reg_hint_type
;
1778 queue_regulatory_request(request
);
1784 int regulatory_hint(struct wiphy
*wiphy
, const char *alpha2
)
1786 struct regulatory_request
*request
;
1788 if (WARN_ON(!alpha2
|| !wiphy
))
1791 request
= kzalloc(sizeof(struct regulatory_request
), GFP_KERNEL
);
1795 request
->wiphy_idx
= get_wiphy_idx(wiphy
);
1797 request
->alpha2
[0] = alpha2
[0];
1798 request
->alpha2
[1] = alpha2
[1];
1799 request
->initiator
= NL80211_REGDOM_SET_BY_DRIVER
;
1801 queue_regulatory_request(request
);
1805 EXPORT_SYMBOL(regulatory_hint
);
1807 void regulatory_hint_country_ie(struct wiphy
*wiphy
, enum ieee80211_band band
,
1808 const u8
*country_ie
, u8 country_ie_len
)
1811 enum environment_cap env
= ENVIRON_ANY
;
1812 struct regulatory_request
*request
= NULL
, *lr
;
1814 /* IE len must be evenly divisible by 2 */
1815 if (country_ie_len
& 0x01)
1818 if (country_ie_len
< IEEE80211_COUNTRY_IE_MIN_LEN
)
1821 request
= kzalloc(sizeof(*request
), GFP_KERNEL
);
1825 alpha2
[0] = country_ie
[0];
1826 alpha2
[1] = country_ie
[1];
1828 if (country_ie
[2] == 'I')
1829 env
= ENVIRON_INDOOR
;
1830 else if (country_ie
[2] == 'O')
1831 env
= ENVIRON_OUTDOOR
;
1834 lr
= get_last_request();
1840 * We will run this only upon a successful connection on cfg80211.
1841 * We leave conflict resolution to the workqueue, where can hold
1844 if (lr
->initiator
== NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
1845 lr
->wiphy_idx
!= WIPHY_IDX_INVALID
)
1848 request
->wiphy_idx
= get_wiphy_idx(wiphy
);
1849 request
->alpha2
[0] = alpha2
[0];
1850 request
->alpha2
[1] = alpha2
[1];
1851 request
->initiator
= NL80211_REGDOM_SET_BY_COUNTRY_IE
;
1852 request
->country_ie_env
= env
;
1854 queue_regulatory_request(request
);
1861 static void restore_alpha2(char *alpha2
, bool reset_user
)
1863 /* indicates there is no alpha2 to consider for restoration */
1867 /* The user setting has precedence over the module parameter */
1868 if (is_user_regdom_saved()) {
1869 /* Unless we're asked to ignore it and reset it */
1871 REG_DBG_PRINT("Restoring regulatory settings including user preference\n");
1872 user_alpha2
[0] = '9';
1873 user_alpha2
[1] = '7';
1876 * If we're ignoring user settings, we still need to
1877 * check the module parameter to ensure we put things
1878 * back as they were for a full restore.
1880 if (!is_world_regdom(ieee80211_regdom
)) {
1881 REG_DBG_PRINT("Keeping preference on module parameter ieee80211_regdom: %c%c\n",
1882 ieee80211_regdom
[0], ieee80211_regdom
[1]);
1883 alpha2
[0] = ieee80211_regdom
[0];
1884 alpha2
[1] = ieee80211_regdom
[1];
1887 REG_DBG_PRINT("Restoring regulatory settings while preserving user preference for: %c%c\n",
1888 user_alpha2
[0], user_alpha2
[1]);
1889 alpha2
[0] = user_alpha2
[0];
1890 alpha2
[1] = user_alpha2
[1];
1892 } else if (!is_world_regdom(ieee80211_regdom
)) {
1893 REG_DBG_PRINT("Keeping preference on module parameter ieee80211_regdom: %c%c\n",
1894 ieee80211_regdom
[0], ieee80211_regdom
[1]);
1895 alpha2
[0] = ieee80211_regdom
[0];
1896 alpha2
[1] = ieee80211_regdom
[1];
1898 REG_DBG_PRINT("Restoring regulatory settings\n");
1901 static void restore_custom_reg_settings(struct wiphy
*wiphy
)
1903 struct ieee80211_supported_band
*sband
;
1904 enum ieee80211_band band
;
1905 struct ieee80211_channel
*chan
;
1908 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++) {
1909 sband
= wiphy
->bands
[band
];
1912 for (i
= 0; i
< sband
->n_channels
; i
++) {
1913 chan
= &sband
->channels
[i
];
1914 chan
->flags
= chan
->orig_flags
;
1915 chan
->max_antenna_gain
= chan
->orig_mag
;
1916 chan
->max_power
= chan
->orig_mpwr
;
1917 chan
->beacon_found
= false;
1923 * Restoring regulatory settings involves ingoring any
1924 * possibly stale country IE information and user regulatory
1925 * settings if so desired, this includes any beacon hints
1926 * learned as we could have traveled outside to another country
1927 * after disconnection. To restore regulatory settings we do
1928 * exactly what we did at bootup:
1930 * - send a core regulatory hint
1931 * - send a user regulatory hint if applicable
1933 * Device drivers that send a regulatory hint for a specific country
1934 * keep their own regulatory domain on wiphy->regd so that does does
1935 * not need to be remembered.
1937 static void restore_regulatory_settings(bool reset_user
)
1940 char world_alpha2
[2];
1941 struct reg_beacon
*reg_beacon
, *btmp
;
1942 struct regulatory_request
*reg_request
, *tmp
;
1943 LIST_HEAD(tmp_reg_req_list
);
1944 struct cfg80211_registered_device
*rdev
;
1948 reset_regdomains(true, &world_regdom
);
1949 restore_alpha2(alpha2
, reset_user
);
1952 * If there's any pending requests we simply
1953 * stash them to a temporary pending queue and
1954 * add then after we've restored regulatory
1957 spin_lock(®_requests_lock
);
1958 list_for_each_entry_safe(reg_request
, tmp
, ®_requests_list
, list
) {
1959 if (reg_request
->initiator
!= NL80211_REGDOM_SET_BY_USER
)
1961 list_move_tail(®_request
->list
, &tmp_reg_req_list
);
1963 spin_unlock(®_requests_lock
);
1965 /* Clear beacon hints */
1966 spin_lock_bh(®_pending_beacons_lock
);
1967 list_for_each_entry_safe(reg_beacon
, btmp
, ®_pending_beacons
, list
) {
1968 list_del(®_beacon
->list
);
1971 spin_unlock_bh(®_pending_beacons_lock
);
1973 list_for_each_entry_safe(reg_beacon
, btmp
, ®_beacon_list
, list
) {
1974 list_del(®_beacon
->list
);
1978 /* First restore to the basic regulatory settings */
1979 world_alpha2
[0] = cfg80211_world_regdom
->alpha2
[0];
1980 world_alpha2
[1] = cfg80211_world_regdom
->alpha2
[1];
1982 list_for_each_entry(rdev
, &cfg80211_rdev_list
, list
) {
1983 if (rdev
->wiphy
.flags
& WIPHY_FLAG_CUSTOM_REGULATORY
)
1984 restore_custom_reg_settings(&rdev
->wiphy
);
1987 regulatory_hint_core(world_alpha2
);
1990 * This restores the ieee80211_regdom module parameter
1991 * preference or the last user requested regulatory
1992 * settings, user regulatory settings takes precedence.
1994 if (is_an_alpha2(alpha2
))
1995 regulatory_hint_user(user_alpha2
, NL80211_USER_REG_HINT_USER
);
1997 spin_lock(®_requests_lock
);
1998 list_splice_tail_init(&tmp_reg_req_list
, ®_requests_list
);
1999 spin_unlock(®_requests_lock
);
2001 REG_DBG_PRINT("Kicking the queue\n");
2003 schedule_work(®_work
);
2006 void regulatory_hint_disconnect(void)
2008 REG_DBG_PRINT("All devices are disconnected, going to restore regulatory settings\n");
2009 restore_regulatory_settings(false);
2012 static bool freq_is_chan_12_13_14(u16 freq
)
2014 if (freq
== ieee80211_channel_to_frequency(12, IEEE80211_BAND_2GHZ
) ||
2015 freq
== ieee80211_channel_to_frequency(13, IEEE80211_BAND_2GHZ
) ||
2016 freq
== ieee80211_channel_to_frequency(14, IEEE80211_BAND_2GHZ
))
2021 static bool pending_reg_beacon(struct ieee80211_channel
*beacon_chan
)
2023 struct reg_beacon
*pending_beacon
;
2025 list_for_each_entry(pending_beacon
, ®_pending_beacons
, list
)
2026 if (beacon_chan
->center_freq
==
2027 pending_beacon
->chan
.center_freq
)
2032 int regulatory_hint_found_beacon(struct wiphy
*wiphy
,
2033 struct ieee80211_channel
*beacon_chan
,
2036 struct reg_beacon
*reg_beacon
;
2039 if (beacon_chan
->beacon_found
||
2040 beacon_chan
->flags
& IEEE80211_CHAN_RADAR
||
2041 (beacon_chan
->band
== IEEE80211_BAND_2GHZ
&&
2042 !freq_is_chan_12_13_14(beacon_chan
->center_freq
)))
2045 spin_lock_bh(®_pending_beacons_lock
);
2046 processing
= pending_reg_beacon(beacon_chan
);
2047 spin_unlock_bh(®_pending_beacons_lock
);
2052 reg_beacon
= kzalloc(sizeof(struct reg_beacon
), gfp
);
2056 REG_DBG_PRINT("Found new beacon on frequency: %d MHz (Ch %d) on %s\n",
2057 beacon_chan
->center_freq
,
2058 ieee80211_frequency_to_channel(beacon_chan
->center_freq
),
2061 memcpy(®_beacon
->chan
, beacon_chan
,
2062 sizeof(struct ieee80211_channel
));
2065 * Since we can be called from BH or and non-BH context
2066 * we must use spin_lock_bh()
2068 spin_lock_bh(®_pending_beacons_lock
);
2069 list_add_tail(®_beacon
->list
, ®_pending_beacons
);
2070 spin_unlock_bh(®_pending_beacons_lock
);
2072 schedule_work(®_work
);
2077 static void print_rd_rules(const struct ieee80211_regdomain
*rd
)
2080 const struct ieee80211_reg_rule
*reg_rule
= NULL
;
2081 const struct ieee80211_freq_range
*freq_range
= NULL
;
2082 const struct ieee80211_power_rule
*power_rule
= NULL
;
2084 pr_info(" (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)\n");
2086 for (i
= 0; i
< rd
->n_reg_rules
; i
++) {
2087 reg_rule
= &rd
->reg_rules
[i
];
2088 freq_range
= ®_rule
->freq_range
;
2089 power_rule
= ®_rule
->power_rule
;
2092 * There may not be documentation for max antenna gain
2093 * in certain regions
2095 if (power_rule
->max_antenna_gain
)
2096 pr_info(" (%d KHz - %d KHz @ %d KHz), (%d mBi, %d mBm)\n",
2097 freq_range
->start_freq_khz
,
2098 freq_range
->end_freq_khz
,
2099 freq_range
->max_bandwidth_khz
,
2100 power_rule
->max_antenna_gain
,
2101 power_rule
->max_eirp
);
2103 pr_info(" (%d KHz - %d KHz @ %d KHz), (N/A, %d mBm)\n",
2104 freq_range
->start_freq_khz
,
2105 freq_range
->end_freq_khz
,
2106 freq_range
->max_bandwidth_khz
,
2107 power_rule
->max_eirp
);
2111 bool reg_supported_dfs_region(u8 dfs_region
)
2113 switch (dfs_region
) {
2114 case NL80211_DFS_UNSET
:
2115 case NL80211_DFS_FCC
:
2116 case NL80211_DFS_ETSI
:
2117 case NL80211_DFS_JP
:
2120 REG_DBG_PRINT("Ignoring uknown DFS master region: %d\n",
2126 static void print_dfs_region(u8 dfs_region
)
2131 switch (dfs_region
) {
2132 case NL80211_DFS_FCC
:
2133 pr_info(" DFS Master region FCC");
2135 case NL80211_DFS_ETSI
:
2136 pr_info(" DFS Master region ETSI");
2138 case NL80211_DFS_JP
:
2139 pr_info(" DFS Master region JP");
2142 pr_info(" DFS Master region Unknown");
2147 static void print_regdomain(const struct ieee80211_regdomain
*rd
)
2149 struct regulatory_request
*lr
= get_last_request();
2151 if (is_intersected_alpha2(rd
->alpha2
)) {
2152 if (lr
->initiator
== NL80211_REGDOM_SET_BY_COUNTRY_IE
) {
2153 struct cfg80211_registered_device
*rdev
;
2154 rdev
= cfg80211_rdev_by_wiphy_idx(lr
->wiphy_idx
);
2156 pr_info("Current regulatory domain updated by AP to: %c%c\n",
2157 rdev
->country_ie_alpha2
[0],
2158 rdev
->country_ie_alpha2
[1]);
2160 pr_info("Current regulatory domain intersected:\n");
2162 pr_info("Current regulatory domain intersected:\n");
2163 } else if (is_world_regdom(rd
->alpha2
)) {
2164 pr_info("World regulatory domain updated:\n");
2166 if (is_unknown_alpha2(rd
->alpha2
))
2167 pr_info("Regulatory domain changed to driver built-in settings (unknown country)\n");
2169 if (reg_request_cell_base(lr
))
2170 pr_info("Regulatory domain changed to country: %c%c by Cell Station\n",
2171 rd
->alpha2
[0], rd
->alpha2
[1]);
2173 pr_info("Regulatory domain changed to country: %c%c\n",
2174 rd
->alpha2
[0], rd
->alpha2
[1]);
2178 print_dfs_region(rd
->dfs_region
);
2182 static void print_regdomain_info(const struct ieee80211_regdomain
*rd
)
2184 pr_info("Regulatory domain: %c%c\n", rd
->alpha2
[0], rd
->alpha2
[1]);
2188 /* Takes ownership of rd only if it doesn't fail */
2189 static int __set_regdom(const struct ieee80211_regdomain
*rd
)
2191 const struct ieee80211_regdomain
*regd
;
2192 const struct ieee80211_regdomain
*intersected_rd
= NULL
;
2193 struct wiphy
*request_wiphy
;
2194 struct regulatory_request
*lr
= get_last_request();
2196 /* Some basic sanity checks first */
2198 if (!reg_is_valid_request(rd
->alpha2
))
2201 if (is_world_regdom(rd
->alpha2
)) {
2202 update_world_regdomain(rd
);
2206 if (!is_alpha2_set(rd
->alpha2
) && !is_an_alpha2(rd
->alpha2
) &&
2207 !is_unknown_alpha2(rd
->alpha2
))
2211 * Lets only bother proceeding on the same alpha2 if the current
2212 * rd is non static (it means CRDA was present and was used last)
2213 * and the pending request came in from a country IE
2215 if (lr
->initiator
!= NL80211_REGDOM_SET_BY_COUNTRY_IE
) {
2217 * If someone else asked us to change the rd lets only bother
2218 * checking if the alpha2 changes if CRDA was already called
2220 if (!regdom_changes(rd
->alpha2
))
2225 * Now lets set the regulatory domain, update all driver channels
2226 * and finally inform them of what we have done, in case they want
2227 * to review or adjust their own settings based on their own
2228 * internal EEPROM data
2231 if (!is_valid_rd(rd
)) {
2232 pr_err("Invalid regulatory domain detected:\n");
2233 print_regdomain_info(rd
);
2237 request_wiphy
= wiphy_idx_to_wiphy(lr
->wiphy_idx
);
2238 if (!request_wiphy
&&
2239 (lr
->initiator
== NL80211_REGDOM_SET_BY_DRIVER
||
2240 lr
->initiator
== NL80211_REGDOM_SET_BY_COUNTRY_IE
)) {
2241 schedule_delayed_work(®_timeout
, 0);
2245 if (!lr
->intersect
) {
2246 if (lr
->initiator
!= NL80211_REGDOM_SET_BY_DRIVER
) {
2247 reset_regdomains(false, rd
);
2252 * For a driver hint, lets copy the regulatory domain the
2253 * driver wanted to the wiphy to deal with conflicts
2257 * Userspace could have sent two replies with only
2258 * one kernel request.
2260 if (request_wiphy
->regd
)
2263 regd
= reg_copy_regd(rd
);
2265 return PTR_ERR(regd
);
2267 rcu_assign_pointer(request_wiphy
->regd
, regd
);
2268 reset_regdomains(false, rd
);
2272 /* Intersection requires a bit more work */
2274 if (lr
->initiator
!= NL80211_REGDOM_SET_BY_COUNTRY_IE
) {
2275 intersected_rd
= regdom_intersect(rd
, get_cfg80211_regdom());
2276 if (!intersected_rd
)
2280 * We can trash what CRDA provided now.
2281 * However if a driver requested this specific regulatory
2282 * domain we keep it for its private use
2284 if (lr
->initiator
== NL80211_REGDOM_SET_BY_DRIVER
) {
2285 const struct ieee80211_regdomain
*tmp
;
2287 tmp
= get_wiphy_regdom(request_wiphy
);
2288 rcu_assign_pointer(request_wiphy
->regd
, rd
);
2289 rcu_free_regdom(tmp
);
2296 reset_regdomains(false, intersected_rd
);
2306 * Use this call to set the current regulatory domain. Conflicts with
2307 * multiple drivers can be ironed out later. Caller must've already
2308 * kmalloc'd the rd structure.
2310 int set_regdom(const struct ieee80211_regdomain
*rd
)
2312 struct regulatory_request
*lr
;
2315 lr
= get_last_request();
2317 /* Note that this doesn't update the wiphys, this is done below */
2318 r
= __set_regdom(rd
);
2321 reg_set_request_processed();
2327 /* This would make this whole thing pointless */
2328 if (WARN_ON(!lr
->intersect
&& rd
!= get_cfg80211_regdom()))
2331 /* update all wiphys now with the new established regulatory domain */
2332 update_all_wiphy_regulatory(lr
->initiator
);
2334 print_regdomain(get_cfg80211_regdom());
2336 nl80211_send_reg_change_event(lr
);
2338 reg_set_request_processed();
2343 int reg_device_uevent(struct device
*dev
, struct kobj_uevent_env
*env
)
2345 struct regulatory_request
*lr
;
2350 lr
= get_last_request();
2351 if (lr
&& !lr
->processed
) {
2352 memcpy(alpha2
, lr
->alpha2
, 2);
2358 return add_uevent_var(env
, "COUNTRY=%c%c",
2359 alpha2
[0], alpha2
[1]);
2363 void wiphy_regulatory_register(struct wiphy
*wiphy
)
2365 struct regulatory_request
*lr
;
2367 if (!reg_dev_ignore_cell_hint(wiphy
))
2368 reg_num_devs_support_basehint
++;
2370 lr
= get_last_request();
2371 wiphy_update_regulatory(wiphy
, lr
->initiator
);
2374 void wiphy_regulatory_deregister(struct wiphy
*wiphy
)
2376 struct wiphy
*request_wiphy
= NULL
;
2377 struct regulatory_request
*lr
;
2379 lr
= get_last_request();
2381 if (!reg_dev_ignore_cell_hint(wiphy
))
2382 reg_num_devs_support_basehint
--;
2384 rcu_free_regdom(get_wiphy_regdom(wiphy
));
2385 rcu_assign_pointer(wiphy
->regd
, NULL
);
2388 request_wiphy
= wiphy_idx_to_wiphy(lr
->wiphy_idx
);
2390 if (!request_wiphy
|| request_wiphy
!= wiphy
)
2393 lr
->wiphy_idx
= WIPHY_IDX_INVALID
;
2394 lr
->country_ie_env
= ENVIRON_ANY
;
2397 static void reg_timeout_work(struct work_struct
*work
)
2399 REG_DBG_PRINT("Timeout while waiting for CRDA to reply, restoring regulatory settings\n");
2401 restore_regulatory_settings(true);
2405 int __init
regulatory_init(void)
2409 reg_pdev
= platform_device_register_simple("regulatory", 0, NULL
, 0);
2410 if (IS_ERR(reg_pdev
))
2411 return PTR_ERR(reg_pdev
);
2413 reg_pdev
->dev
.type
= ®_device_type
;
2415 spin_lock_init(®_requests_lock
);
2416 spin_lock_init(®_pending_beacons_lock
);
2418 reg_regdb_size_check();
2420 rcu_assign_pointer(cfg80211_regdomain
, cfg80211_world_regdom
);
2422 user_alpha2
[0] = '9';
2423 user_alpha2
[1] = '7';
2425 /* We always try to get an update for the static regdomain */
2426 err
= regulatory_hint_core(cfg80211_world_regdom
->alpha2
);
2431 * N.B. kobject_uevent_env() can fail mainly for when we're out
2432 * memory which is handled and propagated appropriately above
2433 * but it can also fail during a netlink_broadcast() or during
2434 * early boot for call_usermodehelper(). For now treat these
2435 * errors as non-fatal.
2437 pr_err("kobject_uevent_env() was unable to call CRDA during init\n");
2441 * Finally, if the user set the module parameter treat it
2444 if (!is_world_regdom(ieee80211_regdom
))
2445 regulatory_hint_user(ieee80211_regdom
,
2446 NL80211_USER_REG_HINT_USER
);
2451 void regulatory_exit(void)
2453 struct regulatory_request
*reg_request
, *tmp
;
2454 struct reg_beacon
*reg_beacon
, *btmp
;
2456 cancel_work_sync(®_work
);
2457 cancel_delayed_work_sync(®_timeout
);
2459 /* Lock to suppress warnings */
2461 reset_regdomains(true, NULL
);
2464 dev_set_uevent_suppress(®_pdev
->dev
, true);
2466 platform_device_unregister(reg_pdev
);
2468 list_for_each_entry_safe(reg_beacon
, btmp
, ®_pending_beacons
, list
) {
2469 list_del(®_beacon
->list
);
2473 list_for_each_entry_safe(reg_beacon
, btmp
, ®_beacon_list
, list
) {
2474 list_del(®_beacon
->list
);
2478 list_for_each_entry_safe(reg_request
, tmp
, ®_requests_list
, list
) {
2479 list_del(®_request
->list
);