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/random.h>
52 #include <linux/ctype.h>
53 #include <linux/nl80211.h>
54 #include <linux/platform_device.h>
55 #include <linux/moduleparam.h>
56 #include <net/cfg80211.h>
62 #ifdef CONFIG_CFG80211_REG_DEBUG
63 #define REG_DBG_PRINT(format, args...) \
64 printk(KERN_DEBUG pr_fmt(format), ##args)
66 #define REG_DBG_PRINT(args...)
69 static struct regulatory_request core_request_world
= {
70 .initiator
= NL80211_REGDOM_SET_BY_CORE
,
75 .country_ie_env
= ENVIRON_ANY
,
78 /* Receipt of information from last regulatory request */
79 static struct regulatory_request
*last_request
= &core_request_world
;
81 /* To trigger userspace events */
82 static struct platform_device
*reg_pdev
;
84 static struct device_type reg_device_type
= {
85 .uevent
= reg_device_uevent
,
89 * Central wireless core regulatory domains, we only need two,
90 * the current one and a world regulatory domain in case we have no
91 * information to give us an alpha2
93 const struct ieee80211_regdomain
*cfg80211_regdomain
;
96 * Protects static reg.c components:
97 * - cfg80211_world_regdom
100 * - reg_num_devs_support_basehint
102 static DEFINE_MUTEX(reg_mutex
);
105 * Number of devices that registered to the core
106 * that support cellular base station regulatory hints
108 static int reg_num_devs_support_basehint
;
110 static inline void assert_reg_lock(void)
112 lockdep_assert_held(®_mutex
);
115 /* Used to queue up regulatory hints */
116 static LIST_HEAD(reg_requests_list
);
117 static spinlock_t reg_requests_lock
;
119 /* Used to queue up beacon hints for review */
120 static LIST_HEAD(reg_pending_beacons
);
121 static spinlock_t reg_pending_beacons_lock
;
123 /* Used to keep track of processed beacon hints */
124 static LIST_HEAD(reg_beacon_list
);
127 struct list_head list
;
128 struct ieee80211_channel chan
;
131 static void reg_todo(struct work_struct
*work
);
132 static DECLARE_WORK(reg_work
, reg_todo
);
134 static void reg_timeout_work(struct work_struct
*work
);
135 static DECLARE_DELAYED_WORK(reg_timeout
, reg_timeout_work
);
137 /* We keep a static world regulatory domain in case of the absence of CRDA */
138 static const struct ieee80211_regdomain world_regdom
= {
142 /* IEEE 802.11b/g, channels 1..11 */
143 REG_RULE(2412-10, 2462+10, 40, 6, 20, 0),
144 /* IEEE 802.11b/g, channels 12..13. No HT40
145 * channel fits here. */
146 REG_RULE(2467-10, 2472+10, 20, 6, 20,
147 NL80211_RRF_PASSIVE_SCAN
|
148 NL80211_RRF_NO_IBSS
),
149 /* IEEE 802.11 channel 14 - Only JP enables
150 * this and for 802.11b only */
151 REG_RULE(2484-10, 2484+10, 20, 6, 20,
152 NL80211_RRF_PASSIVE_SCAN
|
153 NL80211_RRF_NO_IBSS
|
154 NL80211_RRF_NO_OFDM
),
155 /* IEEE 802.11a, channel 36..48 */
156 REG_RULE(5180-10, 5240+10, 40, 6, 20,
157 NL80211_RRF_PASSIVE_SCAN
|
158 NL80211_RRF_NO_IBSS
),
160 /* NB: 5260 MHz - 5700 MHz requies DFS */
162 /* IEEE 802.11a, channel 149..165 */
163 REG_RULE(5745-10, 5825+10, 40, 6, 20,
164 NL80211_RRF_PASSIVE_SCAN
|
165 NL80211_RRF_NO_IBSS
),
167 /* IEEE 802.11ad (60gHz), channels 1..3 */
168 REG_RULE(56160+2160*1-1080, 56160+2160*3+1080, 2160, 0, 0, 0),
172 static const struct ieee80211_regdomain
*cfg80211_world_regdom
=
175 static char *ieee80211_regdom
= "00";
176 static char user_alpha2
[2];
178 module_param(ieee80211_regdom
, charp
, 0444);
179 MODULE_PARM_DESC(ieee80211_regdom
, "IEEE 802.11 regulatory domain code");
181 static void reset_regdomains(bool full_reset
)
183 /* avoid freeing static information or freeing something twice */
184 if (cfg80211_regdomain
== cfg80211_world_regdom
)
185 cfg80211_regdomain
= NULL
;
186 if (cfg80211_world_regdom
== &world_regdom
)
187 cfg80211_world_regdom
= NULL
;
188 if (cfg80211_regdomain
== &world_regdom
)
189 cfg80211_regdomain
= NULL
;
191 kfree(cfg80211_regdomain
);
192 kfree(cfg80211_world_regdom
);
194 cfg80211_world_regdom
= &world_regdom
;
195 cfg80211_regdomain
= NULL
;
200 if (last_request
!= &core_request_world
)
202 last_request
= &core_request_world
;
206 * Dynamic world regulatory domain requested by the wireless
207 * core upon initialization
209 static void update_world_regdomain(const struct ieee80211_regdomain
*rd
)
211 BUG_ON(!last_request
);
213 reset_regdomains(false);
215 cfg80211_world_regdom
= rd
;
216 cfg80211_regdomain
= rd
;
219 bool is_world_regdom(const char *alpha2
)
223 if (alpha2
[0] == '0' && alpha2
[1] == '0')
228 static bool is_alpha2_set(const char *alpha2
)
232 if (alpha2
[0] != 0 && alpha2
[1] != 0)
237 static bool is_unknown_alpha2(const char *alpha2
)
242 * Special case where regulatory domain was built by driver
243 * but a specific alpha2 cannot be determined
245 if (alpha2
[0] == '9' && alpha2
[1] == '9')
250 static bool is_intersected_alpha2(const char *alpha2
)
255 * Special case where regulatory domain is the
256 * result of an intersection between two regulatory domain
259 if (alpha2
[0] == '9' && alpha2
[1] == '8')
264 static bool is_an_alpha2(const char *alpha2
)
268 if (isalpha(alpha2
[0]) && isalpha(alpha2
[1]))
273 static bool alpha2_equal(const char *alpha2_x
, const char *alpha2_y
)
275 if (!alpha2_x
|| !alpha2_y
)
277 if (alpha2_x
[0] == alpha2_y
[0] &&
278 alpha2_x
[1] == alpha2_y
[1])
283 static bool regdom_changes(const char *alpha2
)
285 assert_cfg80211_lock();
287 if (!cfg80211_regdomain
)
289 if (alpha2_equal(cfg80211_regdomain
->alpha2
, alpha2
))
295 * The NL80211_REGDOM_SET_BY_USER regdom alpha2 is cached, this lets
296 * you know if a valid regulatory hint with NL80211_REGDOM_SET_BY_USER
297 * has ever been issued.
299 static bool is_user_regdom_saved(void)
301 if (user_alpha2
[0] == '9' && user_alpha2
[1] == '7')
304 /* This would indicate a mistake on the design */
305 if (WARN((!is_world_regdom(user_alpha2
) &&
306 !is_an_alpha2(user_alpha2
)),
307 "Unexpected user alpha2: %c%c\n",
315 static int reg_copy_regd(const struct ieee80211_regdomain
**dst_regd
,
316 const struct ieee80211_regdomain
*src_regd
)
318 struct ieee80211_regdomain
*regd
;
319 int size_of_regd
= 0;
322 size_of_regd
= sizeof(struct ieee80211_regdomain
) +
323 ((src_regd
->n_reg_rules
+ 1) * sizeof(struct ieee80211_reg_rule
));
325 regd
= kzalloc(size_of_regd
, GFP_KERNEL
);
329 memcpy(regd
, src_regd
, sizeof(struct ieee80211_regdomain
));
331 for (i
= 0; i
< src_regd
->n_reg_rules
; i
++)
332 memcpy(®d
->reg_rules
[i
], &src_regd
->reg_rules
[i
],
333 sizeof(struct ieee80211_reg_rule
));
339 #ifdef CONFIG_CFG80211_INTERNAL_REGDB
340 struct reg_regdb_search_request
{
342 struct list_head list
;
345 static LIST_HEAD(reg_regdb_search_list
);
346 static DEFINE_MUTEX(reg_regdb_search_mutex
);
348 static void reg_regdb_search(struct work_struct
*work
)
350 struct reg_regdb_search_request
*request
;
351 const struct ieee80211_regdomain
*curdom
, *regdom
;
353 bool set_reg
= false;
355 mutex_lock(&cfg80211_mutex
);
357 mutex_lock(®_regdb_search_mutex
);
358 while (!list_empty(®_regdb_search_list
)) {
359 request
= list_first_entry(®_regdb_search_list
,
360 struct reg_regdb_search_request
,
362 list_del(&request
->list
);
364 for (i
=0; i
<reg_regdb_size
; i
++) {
365 curdom
= reg_regdb
[i
];
367 if (!memcmp(request
->alpha2
, curdom
->alpha2
, 2)) {
368 r
= reg_copy_regd(®dom
, curdom
);
378 mutex_unlock(®_regdb_search_mutex
);
383 mutex_unlock(&cfg80211_mutex
);
386 static DECLARE_WORK(reg_regdb_work
, reg_regdb_search
);
388 static void reg_regdb_query(const char *alpha2
)
390 struct reg_regdb_search_request
*request
;
395 request
= kzalloc(sizeof(struct reg_regdb_search_request
), GFP_KERNEL
);
399 memcpy(request
->alpha2
, alpha2
, 2);
401 mutex_lock(®_regdb_search_mutex
);
402 list_add_tail(&request
->list
, ®_regdb_search_list
);
403 mutex_unlock(®_regdb_search_mutex
);
405 schedule_work(®_regdb_work
);
408 /* Feel free to add any other sanity checks here */
409 static void reg_regdb_size_check(void)
411 /* We should ideally BUILD_BUG_ON() but then random builds would fail */
412 WARN_ONCE(!reg_regdb_size
, "db.txt is empty, you should update it...");
415 static inline void reg_regdb_size_check(void) {}
416 static inline void reg_regdb_query(const char *alpha2
) {}
417 #endif /* CONFIG_CFG80211_INTERNAL_REGDB */
420 * This lets us keep regulatory code which is updated on a regulatory
421 * basis in userspace. Country information is filled in by
424 static int call_crda(const char *alpha2
)
426 if (!is_world_regdom((char *) alpha2
))
427 pr_info("Calling CRDA for country: %c%c\n",
428 alpha2
[0], alpha2
[1]);
430 pr_info("Calling CRDA to update world regulatory domain\n");
432 /* query internal regulatory database (if it exists) */
433 reg_regdb_query(alpha2
);
435 return kobject_uevent(®_pdev
->dev
.kobj
, KOBJ_CHANGE
);
438 /* Used by nl80211 before kmalloc'ing our regulatory domain */
439 bool reg_is_valid_request(const char *alpha2
)
441 assert_cfg80211_lock();
446 return alpha2_equal(last_request
->alpha2
, alpha2
);
449 /* Sanity check on a regulatory rule */
450 static bool is_valid_reg_rule(const struct ieee80211_reg_rule
*rule
)
452 const struct ieee80211_freq_range
*freq_range
= &rule
->freq_range
;
455 if (freq_range
->start_freq_khz
<= 0 || freq_range
->end_freq_khz
<= 0)
458 if (freq_range
->start_freq_khz
> freq_range
->end_freq_khz
)
461 freq_diff
= freq_range
->end_freq_khz
- freq_range
->start_freq_khz
;
463 if (freq_range
->end_freq_khz
<= freq_range
->start_freq_khz
||
464 freq_range
->max_bandwidth_khz
> freq_diff
)
470 static bool is_valid_rd(const struct ieee80211_regdomain
*rd
)
472 const struct ieee80211_reg_rule
*reg_rule
= NULL
;
475 if (!rd
->n_reg_rules
)
478 if (WARN_ON(rd
->n_reg_rules
> NL80211_MAX_SUPP_REG_RULES
))
481 for (i
= 0; i
< rd
->n_reg_rules
; i
++) {
482 reg_rule
= &rd
->reg_rules
[i
];
483 if (!is_valid_reg_rule(reg_rule
))
490 static bool reg_does_bw_fit(const struct ieee80211_freq_range
*freq_range
,
494 u32 start_freq_khz
, end_freq_khz
;
496 start_freq_khz
= center_freq_khz
- (bw_khz
/2);
497 end_freq_khz
= center_freq_khz
+ (bw_khz
/2);
499 if (start_freq_khz
>= freq_range
->start_freq_khz
&&
500 end_freq_khz
<= freq_range
->end_freq_khz
)
507 * freq_in_rule_band - tells us if a frequency is in a frequency band
508 * @freq_range: frequency rule we want to query
509 * @freq_khz: frequency we are inquiring about
511 * This lets us know if a specific frequency rule is or is not relevant to
512 * a specific frequency's band. Bands are device specific and artificial
513 * definitions (the "2.4 GHz band", the "5 GHz band" and the "60GHz band"),
514 * however it is safe for now to assume that a frequency rule should not be
515 * part of a frequency's band if the start freq or end freq are off by more
516 * than 2 GHz for the 2.4 and 5 GHz bands, and by more than 10 GHz for the
518 * This resolution can be lowered and should be considered as we add
519 * regulatory rule support for other "bands".
521 static bool freq_in_rule_band(const struct ieee80211_freq_range
*freq_range
,
524 #define ONE_GHZ_IN_KHZ 1000000
526 * From 802.11ad: directional multi-gigabit (DMG):
527 * Pertaining to operation in a frequency band containing a channel
528 * with the Channel starting frequency above 45 GHz.
530 u32 limit
= freq_khz
> 45 * ONE_GHZ_IN_KHZ
?
531 10 * ONE_GHZ_IN_KHZ
: 2 * ONE_GHZ_IN_KHZ
;
532 if (abs(freq_khz
- freq_range
->start_freq_khz
) <= limit
)
534 if (abs(freq_khz
- freq_range
->end_freq_khz
) <= limit
)
537 #undef ONE_GHZ_IN_KHZ
541 * Helper for regdom_intersect(), this does the real
542 * mathematical intersection fun
544 static int reg_rules_intersect(
545 const struct ieee80211_reg_rule
*rule1
,
546 const struct ieee80211_reg_rule
*rule2
,
547 struct ieee80211_reg_rule
*intersected_rule
)
549 const struct ieee80211_freq_range
*freq_range1
, *freq_range2
;
550 struct ieee80211_freq_range
*freq_range
;
551 const struct ieee80211_power_rule
*power_rule1
, *power_rule2
;
552 struct ieee80211_power_rule
*power_rule
;
555 freq_range1
= &rule1
->freq_range
;
556 freq_range2
= &rule2
->freq_range
;
557 freq_range
= &intersected_rule
->freq_range
;
559 power_rule1
= &rule1
->power_rule
;
560 power_rule2
= &rule2
->power_rule
;
561 power_rule
= &intersected_rule
->power_rule
;
563 freq_range
->start_freq_khz
= max(freq_range1
->start_freq_khz
,
564 freq_range2
->start_freq_khz
);
565 freq_range
->end_freq_khz
= min(freq_range1
->end_freq_khz
,
566 freq_range2
->end_freq_khz
);
567 freq_range
->max_bandwidth_khz
= min(freq_range1
->max_bandwidth_khz
,
568 freq_range2
->max_bandwidth_khz
);
570 freq_diff
= freq_range
->end_freq_khz
- freq_range
->start_freq_khz
;
571 if (freq_range
->max_bandwidth_khz
> freq_diff
)
572 freq_range
->max_bandwidth_khz
= freq_diff
;
574 power_rule
->max_eirp
= min(power_rule1
->max_eirp
,
575 power_rule2
->max_eirp
);
576 power_rule
->max_antenna_gain
= min(power_rule1
->max_antenna_gain
,
577 power_rule2
->max_antenna_gain
);
579 intersected_rule
->flags
= (rule1
->flags
| rule2
->flags
);
581 if (!is_valid_reg_rule(intersected_rule
))
588 * regdom_intersect - do the intersection between two regulatory domains
589 * @rd1: first regulatory domain
590 * @rd2: second regulatory domain
592 * Use this function to get the intersection between two regulatory domains.
593 * Once completed we will mark the alpha2 for the rd as intersected, "98",
594 * as no one single alpha2 can represent this regulatory domain.
596 * Returns a pointer to the regulatory domain structure which will hold the
597 * resulting intersection of rules between rd1 and rd2. We will
598 * kzalloc() this structure for you.
600 static struct ieee80211_regdomain
*regdom_intersect(
601 const struct ieee80211_regdomain
*rd1
,
602 const struct ieee80211_regdomain
*rd2
)
606 unsigned int num_rules
= 0, rule_idx
= 0;
607 const struct ieee80211_reg_rule
*rule1
, *rule2
;
608 struct ieee80211_reg_rule
*intersected_rule
;
609 struct ieee80211_regdomain
*rd
;
610 /* This is just a dummy holder to help us count */
611 struct ieee80211_reg_rule irule
;
613 /* Uses the stack temporarily for counter arithmetic */
614 intersected_rule
= &irule
;
616 memset(intersected_rule
, 0, sizeof(struct ieee80211_reg_rule
));
622 * First we get a count of the rules we'll need, then we actually
623 * build them. This is to so we can malloc() and free() a
624 * regdomain once. The reason we use reg_rules_intersect() here
625 * is it will return -EINVAL if the rule computed makes no sense.
626 * All rules that do check out OK are valid.
629 for (x
= 0; x
< rd1
->n_reg_rules
; x
++) {
630 rule1
= &rd1
->reg_rules
[x
];
631 for (y
= 0; y
< rd2
->n_reg_rules
; y
++) {
632 rule2
= &rd2
->reg_rules
[y
];
633 if (!reg_rules_intersect(rule1
, rule2
,
636 memset(intersected_rule
, 0,
637 sizeof(struct ieee80211_reg_rule
));
644 size_of_regd
= sizeof(struct ieee80211_regdomain
) +
645 ((num_rules
+ 1) * sizeof(struct ieee80211_reg_rule
));
647 rd
= kzalloc(size_of_regd
, GFP_KERNEL
);
651 for (x
= 0; x
< rd1
->n_reg_rules
; x
++) {
652 rule1
= &rd1
->reg_rules
[x
];
653 for (y
= 0; y
< rd2
->n_reg_rules
; y
++) {
654 rule2
= &rd2
->reg_rules
[y
];
656 * This time around instead of using the stack lets
657 * write to the target rule directly saving ourselves
660 intersected_rule
= &rd
->reg_rules
[rule_idx
];
661 r
= reg_rules_intersect(rule1
, rule2
,
664 * No need to memset here the intersected rule here as
665 * we're not using the stack anymore
673 if (rule_idx
!= num_rules
) {
678 rd
->n_reg_rules
= num_rules
;
686 * XXX: add support for the rest of enum nl80211_reg_rule_flags, we may
687 * want to just have the channel structure use these
689 static u32
map_regdom_flags(u32 rd_flags
)
691 u32 channel_flags
= 0;
692 if (rd_flags
& NL80211_RRF_PASSIVE_SCAN
)
693 channel_flags
|= IEEE80211_CHAN_PASSIVE_SCAN
;
694 if (rd_flags
& NL80211_RRF_NO_IBSS
)
695 channel_flags
|= IEEE80211_CHAN_NO_IBSS
;
696 if (rd_flags
& NL80211_RRF_DFS
)
697 channel_flags
|= IEEE80211_CHAN_RADAR
;
698 if (rd_flags
& NL80211_RRF_NO_OFDM
)
699 channel_flags
|= IEEE80211_CHAN_NO_OFDM
;
700 return channel_flags
;
703 static int freq_reg_info_regd(struct wiphy
*wiphy
,
706 const struct ieee80211_reg_rule
**reg_rule
,
707 const struct ieee80211_regdomain
*custom_regd
)
710 bool band_rule_found
= false;
711 const struct ieee80211_regdomain
*regd
;
712 bool bw_fits
= false;
715 desired_bw_khz
= MHZ_TO_KHZ(20);
717 regd
= custom_regd
? custom_regd
: cfg80211_regdomain
;
720 * Follow the driver's regulatory domain, if present, unless a country
721 * IE has been processed or a user wants to help complaince further
724 last_request
->initiator
!= NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
725 last_request
->initiator
!= NL80211_REGDOM_SET_BY_USER
&&
732 for (i
= 0; i
< regd
->n_reg_rules
; i
++) {
733 const struct ieee80211_reg_rule
*rr
;
734 const struct ieee80211_freq_range
*fr
= NULL
;
736 rr
= ®d
->reg_rules
[i
];
737 fr
= &rr
->freq_range
;
740 * We only need to know if one frequency rule was
741 * was in center_freq's band, that's enough, so lets
742 * not overwrite it once found
744 if (!band_rule_found
)
745 band_rule_found
= freq_in_rule_band(fr
, center_freq
);
747 bw_fits
= reg_does_bw_fit(fr
,
751 if (band_rule_found
&& bw_fits
) {
757 if (!band_rule_found
)
763 int freq_reg_info(struct wiphy
*wiphy
,
766 const struct ieee80211_reg_rule
**reg_rule
)
768 assert_cfg80211_lock();
769 return freq_reg_info_regd(wiphy
,
775 EXPORT_SYMBOL(freq_reg_info
);
777 #ifdef CONFIG_CFG80211_REG_DEBUG
778 static const char *reg_initiator_name(enum nl80211_reg_initiator initiator
)
781 case NL80211_REGDOM_SET_BY_CORE
:
782 return "Set by core";
783 case NL80211_REGDOM_SET_BY_USER
:
784 return "Set by user";
785 case NL80211_REGDOM_SET_BY_DRIVER
:
786 return "Set by driver";
787 case NL80211_REGDOM_SET_BY_COUNTRY_IE
:
788 return "Set by country IE";
795 static void chan_reg_rule_print_dbg(struct ieee80211_channel
*chan
,
797 const struct ieee80211_reg_rule
*reg_rule
)
799 const struct ieee80211_power_rule
*power_rule
;
800 const struct ieee80211_freq_range
*freq_range
;
801 char max_antenna_gain
[32];
803 power_rule
= ®_rule
->power_rule
;
804 freq_range
= ®_rule
->freq_range
;
806 if (!power_rule
->max_antenna_gain
)
807 snprintf(max_antenna_gain
, 32, "N/A");
809 snprintf(max_antenna_gain
, 32, "%d", power_rule
->max_antenna_gain
);
811 REG_DBG_PRINT("Updating information on frequency %d MHz "
812 "for a %d MHz width channel with regulatory rule:\n",
814 KHZ_TO_MHZ(desired_bw_khz
));
816 REG_DBG_PRINT("%d KHz - %d KHz @ %d KHz), (%s mBi, %d mBm)\n",
817 freq_range
->start_freq_khz
,
818 freq_range
->end_freq_khz
,
819 freq_range
->max_bandwidth_khz
,
821 power_rule
->max_eirp
);
824 static void chan_reg_rule_print_dbg(struct ieee80211_channel
*chan
,
826 const struct ieee80211_reg_rule
*reg_rule
)
833 * Note that right now we assume the desired channel bandwidth
834 * is always 20 MHz for each individual channel (HT40 uses 20 MHz
835 * per channel, the primary and the extension channel). To support
836 * smaller custom bandwidths such as 5 MHz or 10 MHz we'll need a
837 * new ieee80211_channel.target_bw and re run the regulatory check
838 * on the wiphy with the target_bw specified. Then we can simply use
839 * that below for the desired_bw_khz below.
841 static void handle_channel(struct wiphy
*wiphy
,
842 enum nl80211_reg_initiator initiator
,
843 enum ieee80211_band band
,
844 unsigned int chan_idx
)
847 u32 flags
, bw_flags
= 0;
848 u32 desired_bw_khz
= MHZ_TO_KHZ(20);
849 const struct ieee80211_reg_rule
*reg_rule
= NULL
;
850 const struct ieee80211_power_rule
*power_rule
= NULL
;
851 const struct ieee80211_freq_range
*freq_range
= NULL
;
852 struct ieee80211_supported_band
*sband
;
853 struct ieee80211_channel
*chan
;
854 struct wiphy
*request_wiphy
= NULL
;
856 assert_cfg80211_lock();
858 request_wiphy
= wiphy_idx_to_wiphy(last_request
->wiphy_idx
);
860 sband
= wiphy
->bands
[band
];
861 BUG_ON(chan_idx
>= sband
->n_channels
);
862 chan
= &sband
->channels
[chan_idx
];
864 flags
= chan
->orig_flags
;
866 r
= freq_reg_info(wiphy
,
867 MHZ_TO_KHZ(chan
->center_freq
),
873 * We will disable all channels that do not match our
874 * received regulatory rule unless the hint is coming
875 * from a Country IE and the Country IE had no information
876 * about a band. The IEEE 802.11 spec allows for an AP
877 * to send only a subset of the regulatory rules allowed,
878 * so an AP in the US that only supports 2.4 GHz may only send
879 * a country IE with information for the 2.4 GHz band
880 * while 5 GHz is still supported.
882 if (initiator
== NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
886 REG_DBG_PRINT("Disabling freq %d MHz\n", chan
->center_freq
);
887 chan
->flags
= IEEE80211_CHAN_DISABLED
;
891 chan_reg_rule_print_dbg(chan
, desired_bw_khz
, reg_rule
);
893 power_rule
= ®_rule
->power_rule
;
894 freq_range
= ®_rule
->freq_range
;
896 if (freq_range
->max_bandwidth_khz
< MHZ_TO_KHZ(40))
897 bw_flags
= IEEE80211_CHAN_NO_HT40
;
899 if (last_request
->initiator
== NL80211_REGDOM_SET_BY_DRIVER
&&
900 request_wiphy
&& request_wiphy
== wiphy
&&
901 request_wiphy
->flags
& WIPHY_FLAG_STRICT_REGULATORY
) {
903 * This guarantees the driver's requested regulatory domain
904 * will always be used as a base for further regulatory
907 chan
->flags
= chan
->orig_flags
=
908 map_regdom_flags(reg_rule
->flags
) | bw_flags
;
909 chan
->max_antenna_gain
= chan
->orig_mag
=
910 (int) MBI_TO_DBI(power_rule
->max_antenna_gain
);
911 chan
->max_power
= chan
->orig_mpwr
=
912 (int) MBM_TO_DBM(power_rule
->max_eirp
);
916 chan
->beacon_found
= false;
917 chan
->flags
= flags
| bw_flags
| map_regdom_flags(reg_rule
->flags
);
918 chan
->max_antenna_gain
= min(chan
->orig_mag
,
919 (int) MBI_TO_DBI(power_rule
->max_antenna_gain
));
920 chan
->max_reg_power
= (int) MBM_TO_DBM(power_rule
->max_eirp
);
921 if (chan
->orig_mpwr
) {
923 * Devices that have their own custom regulatory domain
924 * but also use WIPHY_FLAG_STRICT_REGULATORY will follow the
925 * passed country IE power settings.
927 if (initiator
== NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
928 wiphy
->flags
& WIPHY_FLAG_CUSTOM_REGULATORY
&&
929 wiphy
->flags
& WIPHY_FLAG_STRICT_REGULATORY
)
930 chan
->max_power
= chan
->max_reg_power
;
932 chan
->max_power
= min(chan
->orig_mpwr
,
933 chan
->max_reg_power
);
935 chan
->max_power
= chan
->max_reg_power
;
938 static void handle_band(struct wiphy
*wiphy
,
939 enum ieee80211_band band
,
940 enum nl80211_reg_initiator initiator
)
943 struct ieee80211_supported_band
*sband
;
945 BUG_ON(!wiphy
->bands
[band
]);
946 sband
= wiphy
->bands
[band
];
948 for (i
= 0; i
< sband
->n_channels
; i
++)
949 handle_channel(wiphy
, initiator
, band
, i
);
952 static bool reg_request_cell_base(struct regulatory_request
*request
)
954 if (request
->initiator
!= NL80211_REGDOM_SET_BY_USER
)
956 if (request
->user_reg_hint_type
!= NL80211_USER_REG_HINT_CELL_BASE
)
961 bool reg_last_request_cell_base(void)
964 assert_cfg80211_lock();
966 mutex_lock(®_mutex
);
967 val
= reg_request_cell_base(last_request
);
968 mutex_unlock(®_mutex
);
972 #ifdef CONFIG_CFG80211_CERTIFICATION_ONUS
974 /* Core specific check */
975 static int reg_ignore_cell_hint(struct regulatory_request
*pending_request
)
977 if (!reg_num_devs_support_basehint
)
980 if (reg_request_cell_base(last_request
)) {
981 if (!regdom_changes(pending_request
->alpha2
))
988 /* Device specific check */
989 static bool reg_dev_ignore_cell_hint(struct wiphy
*wiphy
)
991 if (!(wiphy
->features
& NL80211_FEATURE_CELL_BASE_REG_HINTS
))
996 static int reg_ignore_cell_hint(struct regulatory_request
*pending_request
)
1000 static int reg_dev_ignore_cell_hint(struct wiphy
*wiphy
)
1007 static bool ignore_reg_update(struct wiphy
*wiphy
,
1008 enum nl80211_reg_initiator initiator
)
1010 if (!last_request
) {
1011 REG_DBG_PRINT("Ignoring regulatory request %s since "
1012 "last_request is not set\n",
1013 reg_initiator_name(initiator
));
1017 if (initiator
== NL80211_REGDOM_SET_BY_CORE
&&
1018 wiphy
->flags
& WIPHY_FLAG_CUSTOM_REGULATORY
) {
1019 REG_DBG_PRINT("Ignoring regulatory request %s "
1020 "since the driver uses its own custom "
1021 "regulatory domain\n",
1022 reg_initiator_name(initiator
));
1027 * wiphy->regd will be set once the device has its own
1028 * desired regulatory domain set
1030 if (wiphy
->flags
& WIPHY_FLAG_STRICT_REGULATORY
&& !wiphy
->regd
&&
1031 initiator
!= NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
1032 !is_world_regdom(last_request
->alpha2
)) {
1033 REG_DBG_PRINT("Ignoring regulatory request %s "
1034 "since the driver requires its own regulatory "
1035 "domain to be set first\n",
1036 reg_initiator_name(initiator
));
1040 if (reg_request_cell_base(last_request
))
1041 return reg_dev_ignore_cell_hint(wiphy
);
1046 static void handle_reg_beacon(struct wiphy
*wiphy
,
1047 unsigned int chan_idx
,
1048 struct reg_beacon
*reg_beacon
)
1050 struct ieee80211_supported_band
*sband
;
1051 struct ieee80211_channel
*chan
;
1052 bool channel_changed
= false;
1053 struct ieee80211_channel chan_before
;
1055 assert_cfg80211_lock();
1057 sband
= wiphy
->bands
[reg_beacon
->chan
.band
];
1058 chan
= &sband
->channels
[chan_idx
];
1060 if (likely(chan
->center_freq
!= reg_beacon
->chan
.center_freq
))
1063 if (chan
->beacon_found
)
1066 chan
->beacon_found
= true;
1068 if (wiphy
->flags
& WIPHY_FLAG_DISABLE_BEACON_HINTS
)
1071 chan_before
.center_freq
= chan
->center_freq
;
1072 chan_before
.flags
= chan
->flags
;
1074 if (chan
->flags
& IEEE80211_CHAN_PASSIVE_SCAN
) {
1075 chan
->flags
&= ~IEEE80211_CHAN_PASSIVE_SCAN
;
1076 channel_changed
= true;
1079 if (chan
->flags
& IEEE80211_CHAN_NO_IBSS
) {
1080 chan
->flags
&= ~IEEE80211_CHAN_NO_IBSS
;
1081 channel_changed
= true;
1084 if (channel_changed
)
1085 nl80211_send_beacon_hint_event(wiphy
, &chan_before
, chan
);
1089 * Called when a scan on a wiphy finds a beacon on
1092 static void wiphy_update_new_beacon(struct wiphy
*wiphy
,
1093 struct reg_beacon
*reg_beacon
)
1096 struct ieee80211_supported_band
*sband
;
1098 assert_cfg80211_lock();
1100 if (!wiphy
->bands
[reg_beacon
->chan
.band
])
1103 sband
= wiphy
->bands
[reg_beacon
->chan
.band
];
1105 for (i
= 0; i
< sband
->n_channels
; i
++)
1106 handle_reg_beacon(wiphy
, i
, reg_beacon
);
1110 * Called upon reg changes or a new wiphy is added
1112 static void wiphy_update_beacon_reg(struct wiphy
*wiphy
)
1115 struct ieee80211_supported_band
*sband
;
1116 struct reg_beacon
*reg_beacon
;
1118 assert_cfg80211_lock();
1120 if (list_empty(®_beacon_list
))
1123 list_for_each_entry(reg_beacon
, ®_beacon_list
, list
) {
1124 if (!wiphy
->bands
[reg_beacon
->chan
.band
])
1126 sband
= wiphy
->bands
[reg_beacon
->chan
.band
];
1127 for (i
= 0; i
< sband
->n_channels
; i
++)
1128 handle_reg_beacon(wiphy
, i
, reg_beacon
);
1132 static bool reg_is_world_roaming(struct wiphy
*wiphy
)
1134 if (is_world_regdom(cfg80211_regdomain
->alpha2
) ||
1135 (wiphy
->regd
&& is_world_regdom(wiphy
->regd
->alpha2
)))
1138 last_request
->initiator
!= NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
1139 wiphy
->flags
& WIPHY_FLAG_CUSTOM_REGULATORY
)
1144 /* Reap the advantages of previously found beacons */
1145 static void reg_process_beacons(struct wiphy
*wiphy
)
1148 * Means we are just firing up cfg80211, so no beacons would
1149 * have been processed yet.
1153 if (!reg_is_world_roaming(wiphy
))
1155 wiphy_update_beacon_reg(wiphy
);
1158 static bool is_ht40_not_allowed(struct ieee80211_channel
*chan
)
1162 if (chan
->flags
& IEEE80211_CHAN_DISABLED
)
1164 /* This would happen when regulatory rules disallow HT40 completely */
1165 if (IEEE80211_CHAN_NO_HT40
== (chan
->flags
& (IEEE80211_CHAN_NO_HT40
)))
1170 static void reg_process_ht_flags_channel(struct wiphy
*wiphy
,
1171 enum ieee80211_band band
,
1172 unsigned int chan_idx
)
1174 struct ieee80211_supported_band
*sband
;
1175 struct ieee80211_channel
*channel
;
1176 struct ieee80211_channel
*channel_before
= NULL
, *channel_after
= NULL
;
1179 assert_cfg80211_lock();
1181 sband
= wiphy
->bands
[band
];
1182 BUG_ON(chan_idx
>= sband
->n_channels
);
1183 channel
= &sband
->channels
[chan_idx
];
1185 if (is_ht40_not_allowed(channel
)) {
1186 channel
->flags
|= IEEE80211_CHAN_NO_HT40
;
1191 * We need to ensure the extension channels exist to
1192 * be able to use HT40- or HT40+, this finds them (or not)
1194 for (i
= 0; i
< sband
->n_channels
; i
++) {
1195 struct ieee80211_channel
*c
= &sband
->channels
[i
];
1196 if (c
->center_freq
== (channel
->center_freq
- 20))
1198 if (c
->center_freq
== (channel
->center_freq
+ 20))
1203 * Please note that this assumes target bandwidth is 20 MHz,
1204 * if that ever changes we also need to change the below logic
1205 * to include that as well.
1207 if (is_ht40_not_allowed(channel_before
))
1208 channel
->flags
|= IEEE80211_CHAN_NO_HT40MINUS
;
1210 channel
->flags
&= ~IEEE80211_CHAN_NO_HT40MINUS
;
1212 if (is_ht40_not_allowed(channel_after
))
1213 channel
->flags
|= IEEE80211_CHAN_NO_HT40PLUS
;
1215 channel
->flags
&= ~IEEE80211_CHAN_NO_HT40PLUS
;
1218 static void reg_process_ht_flags_band(struct wiphy
*wiphy
,
1219 enum ieee80211_band band
)
1222 struct ieee80211_supported_band
*sband
;
1224 BUG_ON(!wiphy
->bands
[band
]);
1225 sband
= wiphy
->bands
[band
];
1227 for (i
= 0; i
< sband
->n_channels
; i
++)
1228 reg_process_ht_flags_channel(wiphy
, band
, i
);
1231 static void reg_process_ht_flags(struct wiphy
*wiphy
)
1233 enum ieee80211_band band
;
1238 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++) {
1239 if (wiphy
->bands
[band
])
1240 reg_process_ht_flags_band(wiphy
, band
);
1245 static void wiphy_update_regulatory(struct wiphy
*wiphy
,
1246 enum nl80211_reg_initiator initiator
)
1248 enum ieee80211_band band
;
1252 if (ignore_reg_update(wiphy
, initiator
))
1255 last_request
->dfs_region
= cfg80211_regdomain
->dfs_region
;
1257 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++) {
1258 if (wiphy
->bands
[band
])
1259 handle_band(wiphy
, band
, initiator
);
1262 reg_process_beacons(wiphy
);
1263 reg_process_ht_flags(wiphy
);
1264 if (wiphy
->reg_notifier
)
1265 wiphy
->reg_notifier(wiphy
, last_request
);
1268 static void update_all_wiphy_regulatory(enum nl80211_reg_initiator initiator
)
1270 struct cfg80211_registered_device
*rdev
;
1271 struct wiphy
*wiphy
;
1273 list_for_each_entry(rdev
, &cfg80211_rdev_list
, list
) {
1274 wiphy
= &rdev
->wiphy
;
1275 wiphy_update_regulatory(wiphy
, initiator
);
1277 * Regulatory updates set by CORE are ignored for custom
1278 * regulatory cards. Let us notify the changes to the driver,
1279 * as some drivers used this to restore its orig_* reg domain.
1281 if (initiator
== NL80211_REGDOM_SET_BY_CORE
&&
1282 wiphy
->flags
& WIPHY_FLAG_CUSTOM_REGULATORY
&&
1283 wiphy
->reg_notifier
)
1284 wiphy
->reg_notifier(wiphy
, last_request
);
1288 static void handle_channel_custom(struct wiphy
*wiphy
,
1289 enum ieee80211_band band
,
1290 unsigned int chan_idx
,
1291 const struct ieee80211_regdomain
*regd
)
1294 u32 desired_bw_khz
= MHZ_TO_KHZ(20);
1296 const struct ieee80211_reg_rule
*reg_rule
= NULL
;
1297 const struct ieee80211_power_rule
*power_rule
= NULL
;
1298 const struct ieee80211_freq_range
*freq_range
= NULL
;
1299 struct ieee80211_supported_band
*sband
;
1300 struct ieee80211_channel
*chan
;
1304 sband
= wiphy
->bands
[band
];
1305 BUG_ON(chan_idx
>= sband
->n_channels
);
1306 chan
= &sband
->channels
[chan_idx
];
1308 r
= freq_reg_info_regd(wiphy
,
1309 MHZ_TO_KHZ(chan
->center_freq
),
1315 REG_DBG_PRINT("Disabling freq %d MHz as custom "
1316 "regd has no rule that fits a %d MHz "
1319 KHZ_TO_MHZ(desired_bw_khz
));
1320 chan
->flags
= IEEE80211_CHAN_DISABLED
;
1324 chan_reg_rule_print_dbg(chan
, desired_bw_khz
, reg_rule
);
1326 power_rule
= ®_rule
->power_rule
;
1327 freq_range
= ®_rule
->freq_range
;
1329 if (freq_range
->max_bandwidth_khz
< MHZ_TO_KHZ(40))
1330 bw_flags
= IEEE80211_CHAN_NO_HT40
;
1332 chan
->flags
|= map_regdom_flags(reg_rule
->flags
) | bw_flags
;
1333 chan
->max_antenna_gain
= (int) MBI_TO_DBI(power_rule
->max_antenna_gain
);
1334 chan
->max_power
= (int) MBM_TO_DBM(power_rule
->max_eirp
);
1337 static void handle_band_custom(struct wiphy
*wiphy
, enum ieee80211_band band
,
1338 const struct ieee80211_regdomain
*regd
)
1341 struct ieee80211_supported_band
*sband
;
1343 BUG_ON(!wiphy
->bands
[band
]);
1344 sband
= wiphy
->bands
[band
];
1346 for (i
= 0; i
< sband
->n_channels
; i
++)
1347 handle_channel_custom(wiphy
, band
, i
, regd
);
1350 /* Used by drivers prior to wiphy registration */
1351 void wiphy_apply_custom_regulatory(struct wiphy
*wiphy
,
1352 const struct ieee80211_regdomain
*regd
)
1354 enum ieee80211_band band
;
1355 unsigned int bands_set
= 0;
1357 mutex_lock(®_mutex
);
1358 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++) {
1359 if (!wiphy
->bands
[band
])
1361 handle_band_custom(wiphy
, band
, regd
);
1364 mutex_unlock(®_mutex
);
1367 * no point in calling this if it won't have any effect
1368 * on your device's supportd bands.
1370 WARN_ON(!bands_set
);
1372 EXPORT_SYMBOL(wiphy_apply_custom_regulatory
);
1375 * Return value which can be used by ignore_request() to indicate
1376 * it has been determined we should intersect two regulatory domains
1378 #define REG_INTERSECT 1
1380 /* This has the logic which determines when a new request
1381 * should be ignored. */
1382 static int ignore_request(struct wiphy
*wiphy
,
1383 struct regulatory_request
*pending_request
)
1385 struct wiphy
*last_wiphy
= NULL
;
1387 assert_cfg80211_lock();
1389 /* All initial requests are respected */
1393 switch (pending_request
->initiator
) {
1394 case NL80211_REGDOM_SET_BY_CORE
:
1396 case NL80211_REGDOM_SET_BY_COUNTRY_IE
:
1398 if (reg_request_cell_base(last_request
)) {
1399 /* Trust a Cell base station over the AP's country IE */
1400 if (regdom_changes(pending_request
->alpha2
))
1405 last_wiphy
= wiphy_idx_to_wiphy(last_request
->wiphy_idx
);
1407 if (unlikely(!is_an_alpha2(pending_request
->alpha2
)))
1409 if (last_request
->initiator
==
1410 NL80211_REGDOM_SET_BY_COUNTRY_IE
) {
1411 if (last_wiphy
!= wiphy
) {
1413 * Two cards with two APs claiming different
1414 * Country IE alpha2s. We could
1415 * intersect them, but that seems unlikely
1416 * to be correct. Reject second one for now.
1418 if (regdom_changes(pending_request
->alpha2
))
1423 * Two consecutive Country IE hints on the same wiphy.
1424 * This should be picked up early by the driver/stack
1426 if (WARN_ON(regdom_changes(pending_request
->alpha2
)))
1431 case NL80211_REGDOM_SET_BY_DRIVER
:
1432 if (last_request
->initiator
== NL80211_REGDOM_SET_BY_CORE
) {
1433 if (regdom_changes(pending_request
->alpha2
))
1439 * This would happen if you unplug and plug your card
1440 * back in or if you add a new device for which the previously
1441 * loaded card also agrees on the regulatory domain.
1443 if (last_request
->initiator
== NL80211_REGDOM_SET_BY_DRIVER
&&
1444 !regdom_changes(pending_request
->alpha2
))
1447 return REG_INTERSECT
;
1448 case NL80211_REGDOM_SET_BY_USER
:
1449 if (reg_request_cell_base(pending_request
))
1450 return reg_ignore_cell_hint(pending_request
);
1452 if (reg_request_cell_base(last_request
))
1455 if (last_request
->initiator
== NL80211_REGDOM_SET_BY_COUNTRY_IE
)
1456 return REG_INTERSECT
;
1458 * If the user knows better the user should set the regdom
1459 * to their country before the IE is picked up
1461 if (last_request
->initiator
== NL80211_REGDOM_SET_BY_USER
&&
1462 last_request
->intersect
)
1465 * Process user requests only after previous user/driver/core
1466 * requests have been processed
1468 if (last_request
->initiator
== NL80211_REGDOM_SET_BY_CORE
||
1469 last_request
->initiator
== NL80211_REGDOM_SET_BY_DRIVER
||
1470 last_request
->initiator
== NL80211_REGDOM_SET_BY_USER
) {
1471 if (regdom_changes(last_request
->alpha2
))
1475 if (!regdom_changes(pending_request
->alpha2
))
1484 static void reg_set_request_processed(void)
1486 bool need_more_processing
= false;
1488 last_request
->processed
= true;
1490 spin_lock(®_requests_lock
);
1491 if (!list_empty(®_requests_list
))
1492 need_more_processing
= true;
1493 spin_unlock(®_requests_lock
);
1495 if (last_request
->initiator
== NL80211_REGDOM_SET_BY_USER
)
1496 cancel_delayed_work(®_timeout
);
1498 if (need_more_processing
)
1499 schedule_work(®_work
);
1503 * __regulatory_hint - hint to the wireless core a regulatory domain
1504 * @wiphy: if the hint comes from country information from an AP, this
1505 * is required to be set to the wiphy that received the information
1506 * @pending_request: the regulatory request currently being processed
1508 * The Wireless subsystem can use this function to hint to the wireless core
1509 * what it believes should be the current regulatory domain.
1511 * Returns zero if all went fine, %-EALREADY if a regulatory domain had
1512 * already been set or other standard error codes.
1514 * Caller must hold &cfg80211_mutex and ®_mutex
1516 static int __regulatory_hint(struct wiphy
*wiphy
,
1517 struct regulatory_request
*pending_request
)
1519 bool intersect
= false;
1522 assert_cfg80211_lock();
1524 r
= ignore_request(wiphy
, pending_request
);
1526 if (r
== REG_INTERSECT
) {
1527 if (pending_request
->initiator
==
1528 NL80211_REGDOM_SET_BY_DRIVER
) {
1529 r
= reg_copy_regd(&wiphy
->regd
, cfg80211_regdomain
);
1531 kfree(pending_request
);
1538 * If the regulatory domain being requested by the
1539 * driver has already been set just copy it to the
1542 if (r
== -EALREADY
&&
1543 pending_request
->initiator
==
1544 NL80211_REGDOM_SET_BY_DRIVER
) {
1545 r
= reg_copy_regd(&wiphy
->regd
, cfg80211_regdomain
);
1547 kfree(pending_request
);
1553 kfree(pending_request
);
1558 if (last_request
!= &core_request_world
)
1559 kfree(last_request
);
1561 last_request
= pending_request
;
1562 last_request
->intersect
= intersect
;
1564 pending_request
= NULL
;
1566 if (last_request
->initiator
== NL80211_REGDOM_SET_BY_USER
) {
1567 user_alpha2
[0] = last_request
->alpha2
[0];
1568 user_alpha2
[1] = last_request
->alpha2
[1];
1571 /* When r == REG_INTERSECT we do need to call CRDA */
1574 * Since CRDA will not be called in this case as we already
1575 * have applied the requested regulatory domain before we just
1576 * inform userspace we have processed the request
1578 if (r
== -EALREADY
) {
1579 nl80211_send_reg_change_event(last_request
);
1580 reg_set_request_processed();
1585 return call_crda(last_request
->alpha2
);
1588 /* This processes *all* regulatory hints */
1589 static void reg_process_hint(struct regulatory_request
*reg_request
,
1590 enum nl80211_reg_initiator reg_initiator
)
1593 struct wiphy
*wiphy
= NULL
;
1595 BUG_ON(!reg_request
->alpha2
);
1597 if (wiphy_idx_valid(reg_request
->wiphy_idx
))
1598 wiphy
= wiphy_idx_to_wiphy(reg_request
->wiphy_idx
);
1600 if (reg_initiator
== NL80211_REGDOM_SET_BY_DRIVER
&&
1606 r
= __regulatory_hint(wiphy
, reg_request
);
1607 /* This is required so that the orig_* parameters are saved */
1608 if (r
== -EALREADY
&& wiphy
&&
1609 wiphy
->flags
& WIPHY_FLAG_STRICT_REGULATORY
) {
1610 wiphy_update_regulatory(wiphy
, reg_initiator
);
1615 * We only time out user hints, given that they should be the only
1616 * source of bogus requests.
1618 if (r
!= -EALREADY
&&
1619 reg_initiator
== NL80211_REGDOM_SET_BY_USER
)
1620 schedule_delayed_work(®_timeout
, msecs_to_jiffies(3142));
1624 * Processes regulatory hints, this is all the NL80211_REGDOM_SET_BY_*
1625 * Regulatory hints come on a first come first serve basis and we
1626 * must process each one atomically.
1628 static void reg_process_pending_hints(void)
1630 struct regulatory_request
*reg_request
;
1632 mutex_lock(&cfg80211_mutex
);
1633 mutex_lock(®_mutex
);
1635 /* When last_request->processed becomes true this will be rescheduled */
1636 if (last_request
&& !last_request
->processed
) {
1637 REG_DBG_PRINT("Pending regulatory request, waiting "
1638 "for it to be processed...\n");
1642 spin_lock(®_requests_lock
);
1644 if (list_empty(®_requests_list
)) {
1645 spin_unlock(®_requests_lock
);
1649 reg_request
= list_first_entry(®_requests_list
,
1650 struct regulatory_request
,
1652 list_del_init(®_request
->list
);
1654 spin_unlock(®_requests_lock
);
1656 reg_process_hint(reg_request
, reg_request
->initiator
);
1659 mutex_unlock(®_mutex
);
1660 mutex_unlock(&cfg80211_mutex
);
1663 /* Processes beacon hints -- this has nothing to do with country IEs */
1664 static void reg_process_pending_beacon_hints(void)
1666 struct cfg80211_registered_device
*rdev
;
1667 struct reg_beacon
*pending_beacon
, *tmp
;
1670 * No need to hold the reg_mutex here as we just touch wiphys
1671 * and do not read or access regulatory variables.
1673 mutex_lock(&cfg80211_mutex
);
1675 /* This goes through the _pending_ beacon list */
1676 spin_lock_bh(®_pending_beacons_lock
);
1678 if (list_empty(®_pending_beacons
)) {
1679 spin_unlock_bh(®_pending_beacons_lock
);
1683 list_for_each_entry_safe(pending_beacon
, tmp
,
1684 ®_pending_beacons
, list
) {
1686 list_del_init(&pending_beacon
->list
);
1688 /* Applies the beacon hint to current wiphys */
1689 list_for_each_entry(rdev
, &cfg80211_rdev_list
, list
)
1690 wiphy_update_new_beacon(&rdev
->wiphy
, pending_beacon
);
1692 /* Remembers the beacon hint for new wiphys or reg changes */
1693 list_add_tail(&pending_beacon
->list
, ®_beacon_list
);
1696 spin_unlock_bh(®_pending_beacons_lock
);
1698 mutex_unlock(&cfg80211_mutex
);
1701 static void reg_todo(struct work_struct
*work
)
1703 reg_process_pending_hints();
1704 reg_process_pending_beacon_hints();
1707 static void queue_regulatory_request(struct regulatory_request
*request
)
1709 if (isalpha(request
->alpha2
[0]))
1710 request
->alpha2
[0] = toupper(request
->alpha2
[0]);
1711 if (isalpha(request
->alpha2
[1]))
1712 request
->alpha2
[1] = toupper(request
->alpha2
[1]);
1714 spin_lock(®_requests_lock
);
1715 list_add_tail(&request
->list
, ®_requests_list
);
1716 spin_unlock(®_requests_lock
);
1718 schedule_work(®_work
);
1722 * Core regulatory hint -- happens during cfg80211_init()
1723 * and when we restore regulatory settings.
1725 static int regulatory_hint_core(const char *alpha2
)
1727 struct regulatory_request
*request
;
1729 request
= kzalloc(sizeof(struct regulatory_request
),
1734 request
->alpha2
[0] = alpha2
[0];
1735 request
->alpha2
[1] = alpha2
[1];
1736 request
->initiator
= NL80211_REGDOM_SET_BY_CORE
;
1738 queue_regulatory_request(request
);
1744 int regulatory_hint_user(const char *alpha2
,
1745 enum nl80211_user_reg_hint_type user_reg_hint_type
)
1747 struct regulatory_request
*request
;
1751 request
= kzalloc(sizeof(struct regulatory_request
), GFP_KERNEL
);
1755 request
->wiphy_idx
= WIPHY_IDX_STALE
;
1756 request
->alpha2
[0] = alpha2
[0];
1757 request
->alpha2
[1] = alpha2
[1];
1758 request
->initiator
= NL80211_REGDOM_SET_BY_USER
;
1759 request
->user_reg_hint_type
= user_reg_hint_type
;
1761 queue_regulatory_request(request
);
1767 int regulatory_hint(struct wiphy
*wiphy
, const char *alpha2
)
1769 struct regulatory_request
*request
;
1774 request
= kzalloc(sizeof(struct regulatory_request
), GFP_KERNEL
);
1778 request
->wiphy_idx
= get_wiphy_idx(wiphy
);
1780 /* Must have registered wiphy first */
1781 BUG_ON(!wiphy_idx_valid(request
->wiphy_idx
));
1783 request
->alpha2
[0] = alpha2
[0];
1784 request
->alpha2
[1] = alpha2
[1];
1785 request
->initiator
= NL80211_REGDOM_SET_BY_DRIVER
;
1787 queue_regulatory_request(request
);
1791 EXPORT_SYMBOL(regulatory_hint
);
1794 * We hold wdev_lock() here so we cannot hold cfg80211_mutex() and
1795 * therefore cannot iterate over the rdev list here.
1797 void regulatory_hint_11d(struct wiphy
*wiphy
,
1798 enum ieee80211_band band
,
1803 enum environment_cap env
= ENVIRON_ANY
;
1804 struct regulatory_request
*request
;
1806 mutex_lock(®_mutex
);
1808 if (unlikely(!last_request
))
1811 /* IE len must be evenly divisible by 2 */
1812 if (country_ie_len
& 0x01)
1815 if (country_ie_len
< IEEE80211_COUNTRY_IE_MIN_LEN
)
1818 alpha2
[0] = country_ie
[0];
1819 alpha2
[1] = country_ie
[1];
1821 if (country_ie
[2] == 'I')
1822 env
= ENVIRON_INDOOR
;
1823 else if (country_ie
[2] == 'O')
1824 env
= ENVIRON_OUTDOOR
;
1827 * We will run this only upon a successful connection on cfg80211.
1828 * We leave conflict resolution to the workqueue, where can hold
1831 if (likely(last_request
->initiator
==
1832 NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
1833 wiphy_idx_valid(last_request
->wiphy_idx
)))
1836 request
= kzalloc(sizeof(struct regulatory_request
), GFP_KERNEL
);
1840 request
->wiphy_idx
= get_wiphy_idx(wiphy
);
1841 request
->alpha2
[0] = alpha2
[0];
1842 request
->alpha2
[1] = alpha2
[1];
1843 request
->initiator
= NL80211_REGDOM_SET_BY_COUNTRY_IE
;
1844 request
->country_ie_env
= env
;
1846 mutex_unlock(®_mutex
);
1848 queue_regulatory_request(request
);
1853 mutex_unlock(®_mutex
);
1856 static void restore_alpha2(char *alpha2
, bool reset_user
)
1858 /* indicates there is no alpha2 to consider for restoration */
1862 /* The user setting has precedence over the module parameter */
1863 if (is_user_regdom_saved()) {
1864 /* Unless we're asked to ignore it and reset it */
1866 REG_DBG_PRINT("Restoring regulatory settings "
1867 "including user preference\n");
1868 user_alpha2
[0] = '9';
1869 user_alpha2
[1] = '7';
1872 * If we're ignoring user settings, we still need to
1873 * check the module parameter to ensure we put things
1874 * back as they were for a full restore.
1876 if (!is_world_regdom(ieee80211_regdom
)) {
1877 REG_DBG_PRINT("Keeping preference on "
1878 "module parameter ieee80211_regdom: %c%c\n",
1879 ieee80211_regdom
[0],
1880 ieee80211_regdom
[1]);
1881 alpha2
[0] = ieee80211_regdom
[0];
1882 alpha2
[1] = ieee80211_regdom
[1];
1885 REG_DBG_PRINT("Restoring regulatory settings "
1886 "while preserving user preference for: %c%c\n",
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 "
1894 "module parameter ieee80211_regdom: %c%c\n",
1895 ieee80211_regdom
[0],
1896 ieee80211_regdom
[1]);
1897 alpha2
[0] = ieee80211_regdom
[0];
1898 alpha2
[1] = ieee80211_regdom
[1];
1900 REG_DBG_PRINT("Restoring regulatory settings\n");
1903 static void restore_custom_reg_settings(struct wiphy
*wiphy
)
1905 struct ieee80211_supported_band
*sband
;
1906 enum ieee80211_band band
;
1907 struct ieee80211_channel
*chan
;
1910 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++) {
1911 sband
= wiphy
->bands
[band
];
1914 for (i
= 0; i
< sband
->n_channels
; i
++) {
1915 chan
= &sband
->channels
[i
];
1916 chan
->flags
= chan
->orig_flags
;
1917 chan
->max_antenna_gain
= chan
->orig_mag
;
1918 chan
->max_power
= chan
->orig_mpwr
;
1919 chan
->beacon_found
= false;
1925 * Restoring regulatory settings involves ingoring any
1926 * possibly stale country IE information and user regulatory
1927 * settings if so desired, this includes any beacon hints
1928 * learned as we could have traveled outside to another country
1929 * after disconnection. To restore regulatory settings we do
1930 * exactly what we did at bootup:
1932 * - send a core regulatory hint
1933 * - send a user regulatory hint if applicable
1935 * Device drivers that send a regulatory hint for a specific country
1936 * keep their own regulatory domain on wiphy->regd so that does does
1937 * not need to be remembered.
1939 static void restore_regulatory_settings(bool reset_user
)
1942 char world_alpha2
[2];
1943 struct reg_beacon
*reg_beacon
, *btmp
;
1944 struct regulatory_request
*reg_request
, *tmp
;
1945 LIST_HEAD(tmp_reg_req_list
);
1946 struct cfg80211_registered_device
*rdev
;
1948 mutex_lock(&cfg80211_mutex
);
1949 mutex_lock(®_mutex
);
1951 reset_regdomains(true);
1952 restore_alpha2(alpha2
, reset_user
);
1955 * If there's any pending requests we simply
1956 * stash them to a temporary pending queue and
1957 * add then after we've restored regulatory
1960 spin_lock(®_requests_lock
);
1961 if (!list_empty(®_requests_list
)) {
1962 list_for_each_entry_safe(reg_request
, tmp
,
1963 ®_requests_list
, list
) {
1964 if (reg_request
->initiator
!=
1965 NL80211_REGDOM_SET_BY_USER
)
1967 list_move_tail(®_request
->list
, &tmp_reg_req_list
);
1970 spin_unlock(®_requests_lock
);
1972 /* Clear beacon hints */
1973 spin_lock_bh(®_pending_beacons_lock
);
1974 if (!list_empty(®_pending_beacons
)) {
1975 list_for_each_entry_safe(reg_beacon
, btmp
,
1976 ®_pending_beacons
, list
) {
1977 list_del(®_beacon
->list
);
1981 spin_unlock_bh(®_pending_beacons_lock
);
1983 if (!list_empty(®_beacon_list
)) {
1984 list_for_each_entry_safe(reg_beacon
, btmp
,
1985 ®_beacon_list
, list
) {
1986 list_del(®_beacon
->list
);
1991 /* First restore to the basic regulatory settings */
1992 cfg80211_regdomain
= cfg80211_world_regdom
;
1993 world_alpha2
[0] = cfg80211_regdomain
->alpha2
[0];
1994 world_alpha2
[1] = cfg80211_regdomain
->alpha2
[1];
1996 list_for_each_entry(rdev
, &cfg80211_rdev_list
, list
) {
1997 if (rdev
->wiphy
.flags
& WIPHY_FLAG_CUSTOM_REGULATORY
)
1998 restore_custom_reg_settings(&rdev
->wiphy
);
2001 mutex_unlock(®_mutex
);
2002 mutex_unlock(&cfg80211_mutex
);
2004 regulatory_hint_core(world_alpha2
);
2007 * This restores the ieee80211_regdom module parameter
2008 * preference or the last user requested regulatory
2009 * settings, user regulatory settings takes precedence.
2011 if (is_an_alpha2(alpha2
))
2012 regulatory_hint_user(user_alpha2
, NL80211_USER_REG_HINT_USER
);
2014 if (list_empty(&tmp_reg_req_list
))
2017 mutex_lock(&cfg80211_mutex
);
2018 mutex_lock(®_mutex
);
2020 spin_lock(®_requests_lock
);
2021 list_for_each_entry_safe(reg_request
, tmp
, &tmp_reg_req_list
, list
) {
2022 REG_DBG_PRINT("Adding request for country %c%c back "
2024 reg_request
->alpha2
[0],
2025 reg_request
->alpha2
[1]);
2026 list_move_tail(®_request
->list
, ®_requests_list
);
2028 spin_unlock(®_requests_lock
);
2030 mutex_unlock(®_mutex
);
2031 mutex_unlock(&cfg80211_mutex
);
2033 REG_DBG_PRINT("Kicking the queue\n");
2035 schedule_work(®_work
);
2038 void regulatory_hint_disconnect(void)
2040 REG_DBG_PRINT("All devices are disconnected, going to "
2041 "restore regulatory settings\n");
2042 restore_regulatory_settings(false);
2045 static bool freq_is_chan_12_13_14(u16 freq
)
2047 if (freq
== ieee80211_channel_to_frequency(12, IEEE80211_BAND_2GHZ
) ||
2048 freq
== ieee80211_channel_to_frequency(13, IEEE80211_BAND_2GHZ
) ||
2049 freq
== ieee80211_channel_to_frequency(14, IEEE80211_BAND_2GHZ
))
2054 int regulatory_hint_found_beacon(struct wiphy
*wiphy
,
2055 struct ieee80211_channel
*beacon_chan
,
2058 struct reg_beacon
*reg_beacon
;
2060 if (likely((beacon_chan
->beacon_found
||
2061 (beacon_chan
->flags
& IEEE80211_CHAN_RADAR
) ||
2062 (beacon_chan
->band
== IEEE80211_BAND_2GHZ
&&
2063 !freq_is_chan_12_13_14(beacon_chan
->center_freq
)))))
2066 reg_beacon
= kzalloc(sizeof(struct reg_beacon
), gfp
);
2070 REG_DBG_PRINT("Found new beacon on "
2071 "frequency: %d MHz (Ch %d) on %s\n",
2072 beacon_chan
->center_freq
,
2073 ieee80211_frequency_to_channel(beacon_chan
->center_freq
),
2076 memcpy(®_beacon
->chan
, beacon_chan
,
2077 sizeof(struct ieee80211_channel
));
2081 * Since we can be called from BH or and non-BH context
2082 * we must use spin_lock_bh()
2084 spin_lock_bh(®_pending_beacons_lock
);
2085 list_add_tail(®_beacon
->list
, ®_pending_beacons
);
2086 spin_unlock_bh(®_pending_beacons_lock
);
2088 schedule_work(®_work
);
2093 static void print_rd_rules(const struct ieee80211_regdomain
*rd
)
2096 const struct ieee80211_reg_rule
*reg_rule
= NULL
;
2097 const struct ieee80211_freq_range
*freq_range
= NULL
;
2098 const struct ieee80211_power_rule
*power_rule
= NULL
;
2100 pr_info(" (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)\n");
2102 for (i
= 0; i
< rd
->n_reg_rules
; i
++) {
2103 reg_rule
= &rd
->reg_rules
[i
];
2104 freq_range
= ®_rule
->freq_range
;
2105 power_rule
= ®_rule
->power_rule
;
2108 * There may not be documentation for max antenna gain
2109 * in certain regions
2111 if (power_rule
->max_antenna_gain
)
2112 pr_info(" (%d KHz - %d KHz @ %d KHz), (%d mBi, %d mBm)\n",
2113 freq_range
->start_freq_khz
,
2114 freq_range
->end_freq_khz
,
2115 freq_range
->max_bandwidth_khz
,
2116 power_rule
->max_antenna_gain
,
2117 power_rule
->max_eirp
);
2119 pr_info(" (%d KHz - %d KHz @ %d KHz), (N/A, %d mBm)\n",
2120 freq_range
->start_freq_khz
,
2121 freq_range
->end_freq_khz
,
2122 freq_range
->max_bandwidth_khz
,
2123 power_rule
->max_eirp
);
2127 bool reg_supported_dfs_region(u8 dfs_region
)
2129 switch (dfs_region
) {
2130 case NL80211_DFS_UNSET
:
2131 case NL80211_DFS_FCC
:
2132 case NL80211_DFS_ETSI
:
2133 case NL80211_DFS_JP
:
2136 REG_DBG_PRINT("Ignoring uknown DFS master region: %d\n",
2142 static void print_dfs_region(u8 dfs_region
)
2147 switch (dfs_region
) {
2148 case NL80211_DFS_FCC
:
2149 pr_info(" DFS Master region FCC");
2151 case NL80211_DFS_ETSI
:
2152 pr_info(" DFS Master region ETSI");
2154 case NL80211_DFS_JP
:
2155 pr_info(" DFS Master region JP");
2158 pr_info(" DFS Master region Uknown");
2163 static void print_regdomain(const struct ieee80211_regdomain
*rd
)
2166 if (is_intersected_alpha2(rd
->alpha2
)) {
2168 if (last_request
->initiator
==
2169 NL80211_REGDOM_SET_BY_COUNTRY_IE
) {
2170 struct cfg80211_registered_device
*rdev
;
2171 rdev
= cfg80211_rdev_by_wiphy_idx(
2172 last_request
->wiphy_idx
);
2174 pr_info("Current regulatory domain updated by AP to: %c%c\n",
2175 rdev
->country_ie_alpha2
[0],
2176 rdev
->country_ie_alpha2
[1]);
2178 pr_info("Current regulatory domain intersected:\n");
2180 pr_info("Current regulatory domain intersected:\n");
2181 } else if (is_world_regdom(rd
->alpha2
))
2182 pr_info("World regulatory domain updated:\n");
2184 if (is_unknown_alpha2(rd
->alpha2
))
2185 pr_info("Regulatory domain changed to driver built-in settings (unknown country)\n");
2187 if (reg_request_cell_base(last_request
))
2188 pr_info("Regulatory domain changed "
2189 "to country: %c%c by Cell Station\n",
2190 rd
->alpha2
[0], rd
->alpha2
[1]);
2192 pr_info("Regulatory domain changed "
2193 "to country: %c%c\n",
2194 rd
->alpha2
[0], rd
->alpha2
[1]);
2197 print_dfs_region(rd
->dfs_region
);
2201 static void print_regdomain_info(const struct ieee80211_regdomain
*rd
)
2203 pr_info("Regulatory domain: %c%c\n", rd
->alpha2
[0], rd
->alpha2
[1]);
2207 /* Takes ownership of rd only if it doesn't fail */
2208 static int __set_regdom(const struct ieee80211_regdomain
*rd
)
2210 const struct ieee80211_regdomain
*intersected_rd
= NULL
;
2211 struct wiphy
*request_wiphy
;
2212 /* Some basic sanity checks first */
2214 if (is_world_regdom(rd
->alpha2
)) {
2215 if (WARN_ON(!reg_is_valid_request(rd
->alpha2
)))
2217 update_world_regdomain(rd
);
2221 if (!is_alpha2_set(rd
->alpha2
) && !is_an_alpha2(rd
->alpha2
) &&
2222 !is_unknown_alpha2(rd
->alpha2
))
2229 * Lets only bother proceeding on the same alpha2 if the current
2230 * rd is non static (it means CRDA was present and was used last)
2231 * and the pending request came in from a country IE
2233 if (last_request
->initiator
!= NL80211_REGDOM_SET_BY_COUNTRY_IE
) {
2235 * If someone else asked us to change the rd lets only bother
2236 * checking if the alpha2 changes if CRDA was already called
2238 if (!regdom_changes(rd
->alpha2
))
2243 * Now lets set the regulatory domain, update all driver channels
2244 * and finally inform them of what we have done, in case they want
2245 * to review or adjust their own settings based on their own
2246 * internal EEPROM data
2249 if (WARN_ON(!reg_is_valid_request(rd
->alpha2
)))
2252 if (!is_valid_rd(rd
)) {
2253 pr_err("Invalid regulatory domain detected:\n");
2254 print_regdomain_info(rd
);
2258 request_wiphy
= wiphy_idx_to_wiphy(last_request
->wiphy_idx
);
2259 if (!request_wiphy
&&
2260 (last_request
->initiator
== NL80211_REGDOM_SET_BY_DRIVER
||
2261 last_request
->initiator
== NL80211_REGDOM_SET_BY_COUNTRY_IE
)) {
2262 schedule_delayed_work(®_timeout
, 0);
2266 if (!last_request
->intersect
) {
2269 if (last_request
->initiator
!= NL80211_REGDOM_SET_BY_DRIVER
) {
2270 reset_regdomains(false);
2271 cfg80211_regdomain
= rd
;
2276 * For a driver hint, lets copy the regulatory domain the
2277 * driver wanted to the wiphy to deal with conflicts
2281 * Userspace could have sent two replies with only
2282 * one kernel request.
2284 if (request_wiphy
->regd
)
2287 r
= reg_copy_regd(&request_wiphy
->regd
, rd
);
2291 reset_regdomains(false);
2292 cfg80211_regdomain
= rd
;
2296 /* Intersection requires a bit more work */
2298 if (last_request
->initiator
!= NL80211_REGDOM_SET_BY_COUNTRY_IE
) {
2300 intersected_rd
= regdom_intersect(rd
, cfg80211_regdomain
);
2301 if (!intersected_rd
)
2305 * We can trash what CRDA provided now.
2306 * However if a driver requested this specific regulatory
2307 * domain we keep it for its private use
2309 if (last_request
->initiator
== NL80211_REGDOM_SET_BY_DRIVER
)
2310 request_wiphy
->regd
= rd
;
2316 reset_regdomains(false);
2317 cfg80211_regdomain
= intersected_rd
;
2327 * Use this call to set the current regulatory domain. Conflicts with
2328 * multiple drivers can be ironed out later. Caller must've already
2329 * kmalloc'd the rd structure. Caller must hold cfg80211_mutex
2331 int set_regdom(const struct ieee80211_regdomain
*rd
)
2335 assert_cfg80211_lock();
2337 mutex_lock(®_mutex
);
2339 /* Note that this doesn't update the wiphys, this is done below */
2340 r
= __set_regdom(rd
);
2343 reg_set_request_processed();
2346 mutex_unlock(®_mutex
);
2350 /* This would make this whole thing pointless */
2351 if (!last_request
->intersect
)
2352 BUG_ON(rd
!= cfg80211_regdomain
);
2354 /* update all wiphys now with the new established regulatory domain */
2355 update_all_wiphy_regulatory(last_request
->initiator
);
2357 print_regdomain(cfg80211_regdomain
);
2359 nl80211_send_reg_change_event(last_request
);
2361 reg_set_request_processed();
2363 mutex_unlock(®_mutex
);
2368 #ifdef CONFIG_HOTPLUG
2369 int reg_device_uevent(struct device
*dev
, struct kobj_uevent_env
*env
)
2371 if (last_request
&& !last_request
->processed
) {
2372 if (add_uevent_var(env
, "COUNTRY=%c%c",
2373 last_request
->alpha2
[0],
2374 last_request
->alpha2
[1]))
2381 int reg_device_uevent(struct device
*dev
, struct kobj_uevent_env
*env
)
2385 #endif /* CONFIG_HOTPLUG */
2387 void wiphy_regulatory_register(struct wiphy
*wiphy
)
2389 assert_cfg80211_lock();
2391 mutex_lock(®_mutex
);
2393 if (!reg_dev_ignore_cell_hint(wiphy
))
2394 reg_num_devs_support_basehint
++;
2396 wiphy_update_regulatory(wiphy
, NL80211_REGDOM_SET_BY_CORE
);
2398 mutex_unlock(®_mutex
);
2401 /* Caller must hold cfg80211_mutex */
2402 void wiphy_regulatory_deregister(struct wiphy
*wiphy
)
2404 struct wiphy
*request_wiphy
= NULL
;
2406 assert_cfg80211_lock();
2408 mutex_lock(®_mutex
);
2410 if (!reg_dev_ignore_cell_hint(wiphy
))
2411 reg_num_devs_support_basehint
--;
2416 request_wiphy
= wiphy_idx_to_wiphy(last_request
->wiphy_idx
);
2418 if (!request_wiphy
|| request_wiphy
!= wiphy
)
2421 last_request
->wiphy_idx
= WIPHY_IDX_STALE
;
2422 last_request
->country_ie_env
= ENVIRON_ANY
;
2424 mutex_unlock(®_mutex
);
2427 static void reg_timeout_work(struct work_struct
*work
)
2429 REG_DBG_PRINT("Timeout while waiting for CRDA to reply, "
2430 "restoring regulatory settings\n");
2431 restore_regulatory_settings(true);
2434 int __init
regulatory_init(void)
2438 reg_pdev
= platform_device_register_simple("regulatory", 0, NULL
, 0);
2439 if (IS_ERR(reg_pdev
))
2440 return PTR_ERR(reg_pdev
);
2442 reg_pdev
->dev
.type
= ®_device_type
;
2444 spin_lock_init(®_requests_lock
);
2445 spin_lock_init(®_pending_beacons_lock
);
2447 reg_regdb_size_check();
2449 cfg80211_regdomain
= cfg80211_world_regdom
;
2451 user_alpha2
[0] = '9';
2452 user_alpha2
[1] = '7';
2454 /* We always try to get an update for the static regdomain */
2455 err
= regulatory_hint_core(cfg80211_regdomain
->alpha2
);
2460 * N.B. kobject_uevent_env() can fail mainly for when we're out
2461 * memory which is handled and propagated appropriately above
2462 * but it can also fail during a netlink_broadcast() or during
2463 * early boot for call_usermodehelper(). For now treat these
2464 * errors as non-fatal.
2466 pr_err("kobject_uevent_env() was unable to call CRDA during init\n");
2467 #ifdef CONFIG_CFG80211_REG_DEBUG
2468 /* We want to find out exactly why when debugging */
2474 * Finally, if the user set the module parameter treat it
2477 if (!is_world_regdom(ieee80211_regdom
))
2478 regulatory_hint_user(ieee80211_regdom
,
2479 NL80211_USER_REG_HINT_USER
);
2484 void /* __init_or_exit */ regulatory_exit(void)
2486 struct regulatory_request
*reg_request
, *tmp
;
2487 struct reg_beacon
*reg_beacon
, *btmp
;
2489 cancel_work_sync(®_work
);
2490 cancel_delayed_work_sync(®_timeout
);
2492 mutex_lock(&cfg80211_mutex
);
2493 mutex_lock(®_mutex
);
2495 reset_regdomains(true);
2497 dev_set_uevent_suppress(®_pdev
->dev
, true);
2499 platform_device_unregister(reg_pdev
);
2501 spin_lock_bh(®_pending_beacons_lock
);
2502 if (!list_empty(®_pending_beacons
)) {
2503 list_for_each_entry_safe(reg_beacon
, btmp
,
2504 ®_pending_beacons
, list
) {
2505 list_del(®_beacon
->list
);
2509 spin_unlock_bh(®_pending_beacons_lock
);
2511 if (!list_empty(®_beacon_list
)) {
2512 list_for_each_entry_safe(reg_beacon
, btmp
,
2513 ®_beacon_list
, list
) {
2514 list_del(®_beacon
->list
);
2519 spin_lock(®_requests_lock
);
2520 if (!list_empty(®_requests_list
)) {
2521 list_for_each_entry_safe(reg_request
, tmp
,
2522 ®_requests_list
, list
) {
2523 list_del(®_request
->list
);
2527 spin_unlock(®_requests_lock
);
2529 mutex_unlock(®_mutex
);
2530 mutex_unlock(&cfg80211_mutex
);