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" and the "5 GHz band"), however it is
514 * safe for now to assume that a frequency rule should not be part of a
515 * frequency's band if the start freq or end freq are off by more than 2 GHz.
516 * This resolution can be lowered and should be considered as we add
517 * regulatory rule support for other "bands".
519 static bool freq_in_rule_band(const struct ieee80211_freq_range
*freq_range
,
522 #define ONE_GHZ_IN_KHZ 1000000
523 if (abs(freq_khz
- freq_range
->start_freq_khz
) <= (2 * ONE_GHZ_IN_KHZ
))
525 if (abs(freq_khz
- freq_range
->end_freq_khz
) <= (2 * ONE_GHZ_IN_KHZ
))
528 #undef ONE_GHZ_IN_KHZ
532 * Helper for regdom_intersect(), this does the real
533 * mathematical intersection fun
535 static int reg_rules_intersect(
536 const struct ieee80211_reg_rule
*rule1
,
537 const struct ieee80211_reg_rule
*rule2
,
538 struct ieee80211_reg_rule
*intersected_rule
)
540 const struct ieee80211_freq_range
*freq_range1
, *freq_range2
;
541 struct ieee80211_freq_range
*freq_range
;
542 const struct ieee80211_power_rule
*power_rule1
, *power_rule2
;
543 struct ieee80211_power_rule
*power_rule
;
546 freq_range1
= &rule1
->freq_range
;
547 freq_range2
= &rule2
->freq_range
;
548 freq_range
= &intersected_rule
->freq_range
;
550 power_rule1
= &rule1
->power_rule
;
551 power_rule2
= &rule2
->power_rule
;
552 power_rule
= &intersected_rule
->power_rule
;
554 freq_range
->start_freq_khz
= max(freq_range1
->start_freq_khz
,
555 freq_range2
->start_freq_khz
);
556 freq_range
->end_freq_khz
= min(freq_range1
->end_freq_khz
,
557 freq_range2
->end_freq_khz
);
558 freq_range
->max_bandwidth_khz
= min(freq_range1
->max_bandwidth_khz
,
559 freq_range2
->max_bandwidth_khz
);
561 freq_diff
= freq_range
->end_freq_khz
- freq_range
->start_freq_khz
;
562 if (freq_range
->max_bandwidth_khz
> freq_diff
)
563 freq_range
->max_bandwidth_khz
= freq_diff
;
565 power_rule
->max_eirp
= min(power_rule1
->max_eirp
,
566 power_rule2
->max_eirp
);
567 power_rule
->max_antenna_gain
= min(power_rule1
->max_antenna_gain
,
568 power_rule2
->max_antenna_gain
);
570 intersected_rule
->flags
= (rule1
->flags
| rule2
->flags
);
572 if (!is_valid_reg_rule(intersected_rule
))
579 * regdom_intersect - do the intersection between two regulatory domains
580 * @rd1: first regulatory domain
581 * @rd2: second regulatory domain
583 * Use this function to get the intersection between two regulatory domains.
584 * Once completed we will mark the alpha2 for the rd as intersected, "98",
585 * as no one single alpha2 can represent this regulatory domain.
587 * Returns a pointer to the regulatory domain structure which will hold the
588 * resulting intersection of rules between rd1 and rd2. We will
589 * kzalloc() this structure for you.
591 static struct ieee80211_regdomain
*regdom_intersect(
592 const struct ieee80211_regdomain
*rd1
,
593 const struct ieee80211_regdomain
*rd2
)
597 unsigned int num_rules
= 0, rule_idx
= 0;
598 const struct ieee80211_reg_rule
*rule1
, *rule2
;
599 struct ieee80211_reg_rule
*intersected_rule
;
600 struct ieee80211_regdomain
*rd
;
601 /* This is just a dummy holder to help us count */
602 struct ieee80211_reg_rule irule
;
604 /* Uses the stack temporarily for counter arithmetic */
605 intersected_rule
= &irule
;
607 memset(intersected_rule
, 0, sizeof(struct ieee80211_reg_rule
));
613 * First we get a count of the rules we'll need, then we actually
614 * build them. This is to so we can malloc() and free() a
615 * regdomain once. The reason we use reg_rules_intersect() here
616 * is it will return -EINVAL if the rule computed makes no sense.
617 * All rules that do check out OK are valid.
620 for (x
= 0; x
< rd1
->n_reg_rules
; x
++) {
621 rule1
= &rd1
->reg_rules
[x
];
622 for (y
= 0; y
< rd2
->n_reg_rules
; y
++) {
623 rule2
= &rd2
->reg_rules
[y
];
624 if (!reg_rules_intersect(rule1
, rule2
,
627 memset(intersected_rule
, 0,
628 sizeof(struct ieee80211_reg_rule
));
635 size_of_regd
= sizeof(struct ieee80211_regdomain
) +
636 ((num_rules
+ 1) * sizeof(struct ieee80211_reg_rule
));
638 rd
= kzalloc(size_of_regd
, GFP_KERNEL
);
642 for (x
= 0; x
< rd1
->n_reg_rules
; x
++) {
643 rule1
= &rd1
->reg_rules
[x
];
644 for (y
= 0; y
< rd2
->n_reg_rules
; y
++) {
645 rule2
= &rd2
->reg_rules
[y
];
647 * This time around instead of using the stack lets
648 * write to the target rule directly saving ourselves
651 intersected_rule
= &rd
->reg_rules
[rule_idx
];
652 r
= reg_rules_intersect(rule1
, rule2
,
655 * No need to memset here the intersected rule here as
656 * we're not using the stack anymore
664 if (rule_idx
!= num_rules
) {
669 rd
->n_reg_rules
= num_rules
;
677 * XXX: add support for the rest of enum nl80211_reg_rule_flags, we may
678 * want to just have the channel structure use these
680 static u32
map_regdom_flags(u32 rd_flags
)
682 u32 channel_flags
= 0;
683 if (rd_flags
& NL80211_RRF_PASSIVE_SCAN
)
684 channel_flags
|= IEEE80211_CHAN_PASSIVE_SCAN
;
685 if (rd_flags
& NL80211_RRF_NO_IBSS
)
686 channel_flags
|= IEEE80211_CHAN_NO_IBSS
;
687 if (rd_flags
& NL80211_RRF_DFS
)
688 channel_flags
|= IEEE80211_CHAN_RADAR
;
689 if (rd_flags
& NL80211_RRF_NO_OFDM
)
690 channel_flags
|= IEEE80211_CHAN_NO_OFDM
;
691 return channel_flags
;
694 static int freq_reg_info_regd(struct wiphy
*wiphy
,
697 const struct ieee80211_reg_rule
**reg_rule
,
698 const struct ieee80211_regdomain
*custom_regd
)
701 bool band_rule_found
= false;
702 const struct ieee80211_regdomain
*regd
;
703 bool bw_fits
= false;
706 desired_bw_khz
= MHZ_TO_KHZ(20);
708 regd
= custom_regd
? custom_regd
: cfg80211_regdomain
;
711 * Follow the driver's regulatory domain, if present, unless a country
712 * IE has been processed or a user wants to help complaince further
715 last_request
->initiator
!= NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
716 last_request
->initiator
!= NL80211_REGDOM_SET_BY_USER
&&
723 for (i
= 0; i
< regd
->n_reg_rules
; i
++) {
724 const struct ieee80211_reg_rule
*rr
;
725 const struct ieee80211_freq_range
*fr
= NULL
;
727 rr
= ®d
->reg_rules
[i
];
728 fr
= &rr
->freq_range
;
731 * We only need to know if one frequency rule was
732 * was in center_freq's band, that's enough, so lets
733 * not overwrite it once found
735 if (!band_rule_found
)
736 band_rule_found
= freq_in_rule_band(fr
, center_freq
);
738 bw_fits
= reg_does_bw_fit(fr
,
742 if (band_rule_found
&& bw_fits
) {
748 if (!band_rule_found
)
754 int freq_reg_info(struct wiphy
*wiphy
,
757 const struct ieee80211_reg_rule
**reg_rule
)
759 assert_cfg80211_lock();
760 return freq_reg_info_regd(wiphy
,
766 EXPORT_SYMBOL(freq_reg_info
);
768 #ifdef CONFIG_CFG80211_REG_DEBUG
769 static const char *reg_initiator_name(enum nl80211_reg_initiator initiator
)
772 case NL80211_REGDOM_SET_BY_CORE
:
773 return "Set by core";
774 case NL80211_REGDOM_SET_BY_USER
:
775 return "Set by user";
776 case NL80211_REGDOM_SET_BY_DRIVER
:
777 return "Set by driver";
778 case NL80211_REGDOM_SET_BY_COUNTRY_IE
:
779 return "Set by country IE";
786 static void chan_reg_rule_print_dbg(struct ieee80211_channel
*chan
,
788 const struct ieee80211_reg_rule
*reg_rule
)
790 const struct ieee80211_power_rule
*power_rule
;
791 const struct ieee80211_freq_range
*freq_range
;
792 char max_antenna_gain
[32];
794 power_rule
= ®_rule
->power_rule
;
795 freq_range
= ®_rule
->freq_range
;
797 if (!power_rule
->max_antenna_gain
)
798 snprintf(max_antenna_gain
, 32, "N/A");
800 snprintf(max_antenna_gain
, 32, "%d", power_rule
->max_antenna_gain
);
802 REG_DBG_PRINT("Updating information on frequency %d MHz "
803 "for a %d MHz width channel with regulatory rule:\n",
805 KHZ_TO_MHZ(desired_bw_khz
));
807 REG_DBG_PRINT("%d KHz - %d KHz @ %d KHz), (%s mBi, %d mBm)\n",
808 freq_range
->start_freq_khz
,
809 freq_range
->end_freq_khz
,
810 freq_range
->max_bandwidth_khz
,
812 power_rule
->max_eirp
);
815 static void chan_reg_rule_print_dbg(struct ieee80211_channel
*chan
,
817 const struct ieee80211_reg_rule
*reg_rule
)
824 * Note that right now we assume the desired channel bandwidth
825 * is always 20 MHz for each individual channel (HT40 uses 20 MHz
826 * per channel, the primary and the extension channel). To support
827 * smaller custom bandwidths such as 5 MHz or 10 MHz we'll need a
828 * new ieee80211_channel.target_bw and re run the regulatory check
829 * on the wiphy with the target_bw specified. Then we can simply use
830 * that below for the desired_bw_khz below.
832 static void handle_channel(struct wiphy
*wiphy
,
833 enum nl80211_reg_initiator initiator
,
834 enum ieee80211_band band
,
835 unsigned int chan_idx
)
838 u32 flags
, bw_flags
= 0;
839 u32 desired_bw_khz
= MHZ_TO_KHZ(20);
840 const struct ieee80211_reg_rule
*reg_rule
= NULL
;
841 const struct ieee80211_power_rule
*power_rule
= NULL
;
842 const struct ieee80211_freq_range
*freq_range
= NULL
;
843 struct ieee80211_supported_band
*sband
;
844 struct ieee80211_channel
*chan
;
845 struct wiphy
*request_wiphy
= NULL
;
847 assert_cfg80211_lock();
849 request_wiphy
= wiphy_idx_to_wiphy(last_request
->wiphy_idx
);
851 sband
= wiphy
->bands
[band
];
852 BUG_ON(chan_idx
>= sband
->n_channels
);
853 chan
= &sband
->channels
[chan_idx
];
855 flags
= chan
->orig_flags
;
857 r
= freq_reg_info(wiphy
,
858 MHZ_TO_KHZ(chan
->center_freq
),
864 * We will disable all channels that do not match our
865 * received regulatory rule unless the hint is coming
866 * from a Country IE and the Country IE had no information
867 * about a band. The IEEE 802.11 spec allows for an AP
868 * to send only a subset of the regulatory rules allowed,
869 * so an AP in the US that only supports 2.4 GHz may only send
870 * a country IE with information for the 2.4 GHz band
871 * while 5 GHz is still supported.
873 if (initiator
== NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
877 REG_DBG_PRINT("Disabling freq %d MHz\n", chan
->center_freq
);
878 chan
->flags
= IEEE80211_CHAN_DISABLED
;
882 chan_reg_rule_print_dbg(chan
, desired_bw_khz
, reg_rule
);
884 power_rule
= ®_rule
->power_rule
;
885 freq_range
= ®_rule
->freq_range
;
887 if (freq_range
->max_bandwidth_khz
< MHZ_TO_KHZ(40))
888 bw_flags
= IEEE80211_CHAN_NO_HT40
;
890 if (last_request
->initiator
== NL80211_REGDOM_SET_BY_DRIVER
&&
891 request_wiphy
&& request_wiphy
== wiphy
&&
892 request_wiphy
->flags
& WIPHY_FLAG_STRICT_REGULATORY
) {
894 * This guarantees the driver's requested regulatory domain
895 * will always be used as a base for further regulatory
898 chan
->flags
= chan
->orig_flags
=
899 map_regdom_flags(reg_rule
->flags
) | bw_flags
;
900 chan
->max_antenna_gain
= chan
->orig_mag
=
901 (int) MBI_TO_DBI(power_rule
->max_antenna_gain
);
902 chan
->max_power
= chan
->orig_mpwr
=
903 (int) MBM_TO_DBM(power_rule
->max_eirp
);
907 chan
->beacon_found
= false;
908 chan
->flags
= flags
| bw_flags
| map_regdom_flags(reg_rule
->flags
);
909 chan
->max_antenna_gain
= min(chan
->orig_mag
,
910 (int) MBI_TO_DBI(power_rule
->max_antenna_gain
));
911 chan
->max_reg_power
= (int) MBM_TO_DBM(power_rule
->max_eirp
);
912 if (chan
->orig_mpwr
) {
914 * Devices that have their own custom regulatory domain
915 * but also use WIPHY_FLAG_STRICT_REGULATORY will follow the
916 * passed country IE power settings.
918 if (initiator
== NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
919 wiphy
->flags
& WIPHY_FLAG_CUSTOM_REGULATORY
&&
920 wiphy
->flags
& WIPHY_FLAG_STRICT_REGULATORY
)
921 chan
->max_power
= chan
->max_reg_power
;
923 chan
->max_power
= min(chan
->orig_mpwr
,
924 chan
->max_reg_power
);
926 chan
->max_power
= chan
->max_reg_power
;
929 static void handle_band(struct wiphy
*wiphy
,
930 enum ieee80211_band band
,
931 enum nl80211_reg_initiator initiator
)
934 struct ieee80211_supported_band
*sband
;
936 BUG_ON(!wiphy
->bands
[band
]);
937 sband
= wiphy
->bands
[band
];
939 for (i
= 0; i
< sband
->n_channels
; i
++)
940 handle_channel(wiphy
, initiator
, band
, i
);
943 static bool reg_request_cell_base(struct regulatory_request
*request
)
945 if (request
->initiator
!= NL80211_REGDOM_SET_BY_USER
)
947 if (request
->user_reg_hint_type
!= NL80211_USER_REG_HINT_CELL_BASE
)
952 bool reg_last_request_cell_base(void)
955 assert_cfg80211_lock();
957 mutex_lock(®_mutex
);
958 val
= reg_request_cell_base(last_request
);
959 mutex_unlock(®_mutex
);
963 #ifdef CONFIG_CFG80211_CERTIFICATION_ONUS
965 /* Core specific check */
966 static int reg_ignore_cell_hint(struct regulatory_request
*pending_request
)
968 if (!reg_num_devs_support_basehint
)
971 if (reg_request_cell_base(last_request
)) {
972 if (!regdom_changes(pending_request
->alpha2
))
979 /* Device specific check */
980 static bool reg_dev_ignore_cell_hint(struct wiphy
*wiphy
)
982 if (!(wiphy
->features
& NL80211_FEATURE_CELL_BASE_REG_HINTS
))
987 static int reg_ignore_cell_hint(struct regulatory_request
*pending_request
)
991 static int reg_dev_ignore_cell_hint(struct wiphy
*wiphy
)
998 static bool ignore_reg_update(struct wiphy
*wiphy
,
999 enum nl80211_reg_initiator initiator
)
1001 if (!last_request
) {
1002 REG_DBG_PRINT("Ignoring regulatory request %s since "
1003 "last_request is not set\n",
1004 reg_initiator_name(initiator
));
1008 if (initiator
== NL80211_REGDOM_SET_BY_CORE
&&
1009 wiphy
->flags
& WIPHY_FLAG_CUSTOM_REGULATORY
) {
1010 REG_DBG_PRINT("Ignoring regulatory request %s "
1011 "since the driver uses its own custom "
1012 "regulatory domain\n",
1013 reg_initiator_name(initiator
));
1018 * wiphy->regd will be set once the device has its own
1019 * desired regulatory domain set
1021 if (wiphy
->flags
& WIPHY_FLAG_STRICT_REGULATORY
&& !wiphy
->regd
&&
1022 initiator
!= NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
1023 !is_world_regdom(last_request
->alpha2
)) {
1024 REG_DBG_PRINT("Ignoring regulatory request %s "
1025 "since the driver requires its own regulatory "
1026 "domain to be set first\n",
1027 reg_initiator_name(initiator
));
1031 if (reg_request_cell_base(last_request
))
1032 return reg_dev_ignore_cell_hint(wiphy
);
1037 static void handle_reg_beacon(struct wiphy
*wiphy
,
1038 unsigned int chan_idx
,
1039 struct reg_beacon
*reg_beacon
)
1041 struct ieee80211_supported_band
*sband
;
1042 struct ieee80211_channel
*chan
;
1043 bool channel_changed
= false;
1044 struct ieee80211_channel chan_before
;
1046 assert_cfg80211_lock();
1048 sband
= wiphy
->bands
[reg_beacon
->chan
.band
];
1049 chan
= &sband
->channels
[chan_idx
];
1051 if (likely(chan
->center_freq
!= reg_beacon
->chan
.center_freq
))
1054 if (chan
->beacon_found
)
1057 chan
->beacon_found
= true;
1059 if (wiphy
->flags
& WIPHY_FLAG_DISABLE_BEACON_HINTS
)
1062 chan_before
.center_freq
= chan
->center_freq
;
1063 chan_before
.flags
= chan
->flags
;
1065 if (chan
->flags
& IEEE80211_CHAN_PASSIVE_SCAN
) {
1066 chan
->flags
&= ~IEEE80211_CHAN_PASSIVE_SCAN
;
1067 channel_changed
= true;
1070 if (chan
->flags
& IEEE80211_CHAN_NO_IBSS
) {
1071 chan
->flags
&= ~IEEE80211_CHAN_NO_IBSS
;
1072 channel_changed
= true;
1075 if (channel_changed
)
1076 nl80211_send_beacon_hint_event(wiphy
, &chan_before
, chan
);
1080 * Called when a scan on a wiphy finds a beacon on
1083 static void wiphy_update_new_beacon(struct wiphy
*wiphy
,
1084 struct reg_beacon
*reg_beacon
)
1087 struct ieee80211_supported_band
*sband
;
1089 assert_cfg80211_lock();
1091 if (!wiphy
->bands
[reg_beacon
->chan
.band
])
1094 sband
= wiphy
->bands
[reg_beacon
->chan
.band
];
1096 for (i
= 0; i
< sband
->n_channels
; i
++)
1097 handle_reg_beacon(wiphy
, i
, reg_beacon
);
1101 * Called upon reg changes or a new wiphy is added
1103 static void wiphy_update_beacon_reg(struct wiphy
*wiphy
)
1106 struct ieee80211_supported_band
*sband
;
1107 struct reg_beacon
*reg_beacon
;
1109 assert_cfg80211_lock();
1111 if (list_empty(®_beacon_list
))
1114 list_for_each_entry(reg_beacon
, ®_beacon_list
, list
) {
1115 if (!wiphy
->bands
[reg_beacon
->chan
.band
])
1117 sband
= wiphy
->bands
[reg_beacon
->chan
.band
];
1118 for (i
= 0; i
< sband
->n_channels
; i
++)
1119 handle_reg_beacon(wiphy
, i
, reg_beacon
);
1123 static bool reg_is_world_roaming(struct wiphy
*wiphy
)
1125 if (is_world_regdom(cfg80211_regdomain
->alpha2
) ||
1126 (wiphy
->regd
&& is_world_regdom(wiphy
->regd
->alpha2
)))
1129 last_request
->initiator
!= NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
1130 wiphy
->flags
& WIPHY_FLAG_CUSTOM_REGULATORY
)
1135 /* Reap the advantages of previously found beacons */
1136 static void reg_process_beacons(struct wiphy
*wiphy
)
1139 * Means we are just firing up cfg80211, so no beacons would
1140 * have been processed yet.
1144 if (!reg_is_world_roaming(wiphy
))
1146 wiphy_update_beacon_reg(wiphy
);
1149 static bool is_ht40_not_allowed(struct ieee80211_channel
*chan
)
1153 if (chan
->flags
& IEEE80211_CHAN_DISABLED
)
1155 /* This would happen when regulatory rules disallow HT40 completely */
1156 if (IEEE80211_CHAN_NO_HT40
== (chan
->flags
& (IEEE80211_CHAN_NO_HT40
)))
1161 static void reg_process_ht_flags_channel(struct wiphy
*wiphy
,
1162 enum ieee80211_band band
,
1163 unsigned int chan_idx
)
1165 struct ieee80211_supported_band
*sband
;
1166 struct ieee80211_channel
*channel
;
1167 struct ieee80211_channel
*channel_before
= NULL
, *channel_after
= NULL
;
1170 assert_cfg80211_lock();
1172 sband
= wiphy
->bands
[band
];
1173 BUG_ON(chan_idx
>= sband
->n_channels
);
1174 channel
= &sband
->channels
[chan_idx
];
1176 if (is_ht40_not_allowed(channel
)) {
1177 channel
->flags
|= IEEE80211_CHAN_NO_HT40
;
1182 * We need to ensure the extension channels exist to
1183 * be able to use HT40- or HT40+, this finds them (or not)
1185 for (i
= 0; i
< sband
->n_channels
; i
++) {
1186 struct ieee80211_channel
*c
= &sband
->channels
[i
];
1187 if (c
->center_freq
== (channel
->center_freq
- 20))
1189 if (c
->center_freq
== (channel
->center_freq
+ 20))
1194 * Please note that this assumes target bandwidth is 20 MHz,
1195 * if that ever changes we also need to change the below logic
1196 * to include that as well.
1198 if (is_ht40_not_allowed(channel_before
))
1199 channel
->flags
|= IEEE80211_CHAN_NO_HT40MINUS
;
1201 channel
->flags
&= ~IEEE80211_CHAN_NO_HT40MINUS
;
1203 if (is_ht40_not_allowed(channel_after
))
1204 channel
->flags
|= IEEE80211_CHAN_NO_HT40PLUS
;
1206 channel
->flags
&= ~IEEE80211_CHAN_NO_HT40PLUS
;
1209 static void reg_process_ht_flags_band(struct wiphy
*wiphy
,
1210 enum ieee80211_band band
)
1213 struct ieee80211_supported_band
*sband
;
1215 BUG_ON(!wiphy
->bands
[band
]);
1216 sband
= wiphy
->bands
[band
];
1218 for (i
= 0; i
< sband
->n_channels
; i
++)
1219 reg_process_ht_flags_channel(wiphy
, band
, i
);
1222 static void reg_process_ht_flags(struct wiphy
*wiphy
)
1224 enum ieee80211_band band
;
1229 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++) {
1230 if (wiphy
->bands
[band
])
1231 reg_process_ht_flags_band(wiphy
, band
);
1236 static void wiphy_update_regulatory(struct wiphy
*wiphy
,
1237 enum nl80211_reg_initiator initiator
)
1239 enum ieee80211_band band
;
1243 if (ignore_reg_update(wiphy
, initiator
))
1246 last_request
->dfs_region
= cfg80211_regdomain
->dfs_region
;
1248 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++) {
1249 if (wiphy
->bands
[band
])
1250 handle_band(wiphy
, band
, initiator
);
1253 reg_process_beacons(wiphy
);
1254 reg_process_ht_flags(wiphy
);
1255 if (wiphy
->reg_notifier
)
1256 wiphy
->reg_notifier(wiphy
, last_request
);
1259 static void update_all_wiphy_regulatory(enum nl80211_reg_initiator initiator
)
1261 struct cfg80211_registered_device
*rdev
;
1262 struct wiphy
*wiphy
;
1264 list_for_each_entry(rdev
, &cfg80211_rdev_list
, list
) {
1265 wiphy
= &rdev
->wiphy
;
1266 wiphy_update_regulatory(wiphy
, initiator
);
1268 * Regulatory updates set by CORE are ignored for custom
1269 * regulatory cards. Let us notify the changes to the driver,
1270 * as some drivers used this to restore its orig_* reg domain.
1272 if (initiator
== NL80211_REGDOM_SET_BY_CORE
&&
1273 wiphy
->flags
& WIPHY_FLAG_CUSTOM_REGULATORY
&&
1274 wiphy
->reg_notifier
)
1275 wiphy
->reg_notifier(wiphy
, last_request
);
1279 static void handle_channel_custom(struct wiphy
*wiphy
,
1280 enum ieee80211_band band
,
1281 unsigned int chan_idx
,
1282 const struct ieee80211_regdomain
*regd
)
1285 u32 desired_bw_khz
= MHZ_TO_KHZ(20);
1287 const struct ieee80211_reg_rule
*reg_rule
= NULL
;
1288 const struct ieee80211_power_rule
*power_rule
= NULL
;
1289 const struct ieee80211_freq_range
*freq_range
= NULL
;
1290 struct ieee80211_supported_band
*sband
;
1291 struct ieee80211_channel
*chan
;
1295 sband
= wiphy
->bands
[band
];
1296 BUG_ON(chan_idx
>= sband
->n_channels
);
1297 chan
= &sband
->channels
[chan_idx
];
1299 r
= freq_reg_info_regd(wiphy
,
1300 MHZ_TO_KHZ(chan
->center_freq
),
1306 REG_DBG_PRINT("Disabling freq %d MHz as custom "
1307 "regd has no rule that fits a %d MHz "
1310 KHZ_TO_MHZ(desired_bw_khz
));
1311 chan
->flags
= IEEE80211_CHAN_DISABLED
;
1315 chan_reg_rule_print_dbg(chan
, desired_bw_khz
, reg_rule
);
1317 power_rule
= ®_rule
->power_rule
;
1318 freq_range
= ®_rule
->freq_range
;
1320 if (freq_range
->max_bandwidth_khz
< MHZ_TO_KHZ(40))
1321 bw_flags
= IEEE80211_CHAN_NO_HT40
;
1323 chan
->flags
|= map_regdom_flags(reg_rule
->flags
) | bw_flags
;
1324 chan
->max_antenna_gain
= (int) MBI_TO_DBI(power_rule
->max_antenna_gain
);
1325 chan
->max_power
= (int) MBM_TO_DBM(power_rule
->max_eirp
);
1328 static void handle_band_custom(struct wiphy
*wiphy
, enum ieee80211_band band
,
1329 const struct ieee80211_regdomain
*regd
)
1332 struct ieee80211_supported_band
*sband
;
1334 BUG_ON(!wiphy
->bands
[band
]);
1335 sband
= wiphy
->bands
[band
];
1337 for (i
= 0; i
< sband
->n_channels
; i
++)
1338 handle_channel_custom(wiphy
, band
, i
, regd
);
1341 /* Used by drivers prior to wiphy registration */
1342 void wiphy_apply_custom_regulatory(struct wiphy
*wiphy
,
1343 const struct ieee80211_regdomain
*regd
)
1345 enum ieee80211_band band
;
1346 unsigned int bands_set
= 0;
1348 mutex_lock(®_mutex
);
1349 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++) {
1350 if (!wiphy
->bands
[band
])
1352 handle_band_custom(wiphy
, band
, regd
);
1355 mutex_unlock(®_mutex
);
1358 * no point in calling this if it won't have any effect
1359 * on your device's supportd bands.
1361 WARN_ON(!bands_set
);
1363 EXPORT_SYMBOL(wiphy_apply_custom_regulatory
);
1366 * Return value which can be used by ignore_request() to indicate
1367 * it has been determined we should intersect two regulatory domains
1369 #define REG_INTERSECT 1
1371 /* This has the logic which determines when a new request
1372 * should be ignored. */
1373 static int ignore_request(struct wiphy
*wiphy
,
1374 struct regulatory_request
*pending_request
)
1376 struct wiphy
*last_wiphy
= NULL
;
1378 assert_cfg80211_lock();
1380 /* All initial requests are respected */
1384 switch (pending_request
->initiator
) {
1385 case NL80211_REGDOM_SET_BY_CORE
:
1387 case NL80211_REGDOM_SET_BY_COUNTRY_IE
:
1389 if (reg_request_cell_base(last_request
)) {
1390 /* Trust a Cell base station over the AP's country IE */
1391 if (regdom_changes(pending_request
->alpha2
))
1396 last_wiphy
= wiphy_idx_to_wiphy(last_request
->wiphy_idx
);
1398 if (unlikely(!is_an_alpha2(pending_request
->alpha2
)))
1400 if (last_request
->initiator
==
1401 NL80211_REGDOM_SET_BY_COUNTRY_IE
) {
1402 if (last_wiphy
!= wiphy
) {
1404 * Two cards with two APs claiming different
1405 * Country IE alpha2s. We could
1406 * intersect them, but that seems unlikely
1407 * to be correct. Reject second one for now.
1409 if (regdom_changes(pending_request
->alpha2
))
1414 * Two consecutive Country IE hints on the same wiphy.
1415 * This should be picked up early by the driver/stack
1417 if (WARN_ON(regdom_changes(pending_request
->alpha2
)))
1422 case NL80211_REGDOM_SET_BY_DRIVER
:
1423 if (last_request
->initiator
== NL80211_REGDOM_SET_BY_CORE
) {
1424 if (regdom_changes(pending_request
->alpha2
))
1430 * This would happen if you unplug and plug your card
1431 * back in or if you add a new device for which the previously
1432 * loaded card also agrees on the regulatory domain.
1434 if (last_request
->initiator
== NL80211_REGDOM_SET_BY_DRIVER
&&
1435 !regdom_changes(pending_request
->alpha2
))
1438 return REG_INTERSECT
;
1439 case NL80211_REGDOM_SET_BY_USER
:
1440 if (reg_request_cell_base(pending_request
))
1441 return reg_ignore_cell_hint(pending_request
);
1443 if (reg_request_cell_base(last_request
))
1446 if (last_request
->initiator
== NL80211_REGDOM_SET_BY_COUNTRY_IE
)
1447 return REG_INTERSECT
;
1449 * If the user knows better the user should set the regdom
1450 * to their country before the IE is picked up
1452 if (last_request
->initiator
== NL80211_REGDOM_SET_BY_USER
&&
1453 last_request
->intersect
)
1456 * Process user requests only after previous user/driver/core
1457 * requests have been processed
1459 if (last_request
->initiator
== NL80211_REGDOM_SET_BY_CORE
||
1460 last_request
->initiator
== NL80211_REGDOM_SET_BY_DRIVER
||
1461 last_request
->initiator
== NL80211_REGDOM_SET_BY_USER
) {
1462 if (regdom_changes(last_request
->alpha2
))
1466 if (!regdom_changes(pending_request
->alpha2
))
1475 static void reg_set_request_processed(void)
1477 bool need_more_processing
= false;
1479 last_request
->processed
= true;
1481 spin_lock(®_requests_lock
);
1482 if (!list_empty(®_requests_list
))
1483 need_more_processing
= true;
1484 spin_unlock(®_requests_lock
);
1486 if (last_request
->initiator
== NL80211_REGDOM_SET_BY_USER
)
1487 cancel_delayed_work(®_timeout
);
1489 if (need_more_processing
)
1490 schedule_work(®_work
);
1494 * __regulatory_hint - hint to the wireless core a regulatory domain
1495 * @wiphy: if the hint comes from country information from an AP, this
1496 * is required to be set to the wiphy that received the information
1497 * @pending_request: the regulatory request currently being processed
1499 * The Wireless subsystem can use this function to hint to the wireless core
1500 * what it believes should be the current regulatory domain.
1502 * Returns zero if all went fine, %-EALREADY if a regulatory domain had
1503 * already been set or other standard error codes.
1505 * Caller must hold &cfg80211_mutex and ®_mutex
1507 static int __regulatory_hint(struct wiphy
*wiphy
,
1508 struct regulatory_request
*pending_request
)
1510 bool intersect
= false;
1513 assert_cfg80211_lock();
1515 r
= ignore_request(wiphy
, pending_request
);
1517 if (r
== REG_INTERSECT
) {
1518 if (pending_request
->initiator
==
1519 NL80211_REGDOM_SET_BY_DRIVER
) {
1520 r
= reg_copy_regd(&wiphy
->regd
, cfg80211_regdomain
);
1522 kfree(pending_request
);
1529 * If the regulatory domain being requested by the
1530 * driver has already been set just copy it to the
1533 if (r
== -EALREADY
&&
1534 pending_request
->initiator
==
1535 NL80211_REGDOM_SET_BY_DRIVER
) {
1536 r
= reg_copy_regd(&wiphy
->regd
, cfg80211_regdomain
);
1538 kfree(pending_request
);
1544 kfree(pending_request
);
1549 if (last_request
!= &core_request_world
)
1550 kfree(last_request
);
1552 last_request
= pending_request
;
1553 last_request
->intersect
= intersect
;
1555 pending_request
= NULL
;
1557 if (last_request
->initiator
== NL80211_REGDOM_SET_BY_USER
) {
1558 user_alpha2
[0] = last_request
->alpha2
[0];
1559 user_alpha2
[1] = last_request
->alpha2
[1];
1562 /* When r == REG_INTERSECT we do need to call CRDA */
1565 * Since CRDA will not be called in this case as we already
1566 * have applied the requested regulatory domain before we just
1567 * inform userspace we have processed the request
1569 if (r
== -EALREADY
) {
1570 nl80211_send_reg_change_event(last_request
);
1571 reg_set_request_processed();
1576 return call_crda(last_request
->alpha2
);
1579 /* This processes *all* regulatory hints */
1580 static void reg_process_hint(struct regulatory_request
*reg_request
,
1581 enum nl80211_reg_initiator reg_initiator
)
1584 struct wiphy
*wiphy
= NULL
;
1586 BUG_ON(!reg_request
->alpha2
);
1588 if (wiphy_idx_valid(reg_request
->wiphy_idx
))
1589 wiphy
= wiphy_idx_to_wiphy(reg_request
->wiphy_idx
);
1591 if (reg_initiator
== NL80211_REGDOM_SET_BY_DRIVER
&&
1597 r
= __regulatory_hint(wiphy
, reg_request
);
1598 /* This is required so that the orig_* parameters are saved */
1599 if (r
== -EALREADY
&& wiphy
&&
1600 wiphy
->flags
& WIPHY_FLAG_STRICT_REGULATORY
) {
1601 wiphy_update_regulatory(wiphy
, reg_initiator
);
1606 * We only time out user hints, given that they should be the only
1607 * source of bogus requests.
1609 if (r
!= -EALREADY
&&
1610 reg_initiator
== NL80211_REGDOM_SET_BY_USER
)
1611 schedule_delayed_work(®_timeout
, msecs_to_jiffies(3142));
1615 * Processes regulatory hints, this is all the NL80211_REGDOM_SET_BY_*
1616 * Regulatory hints come on a first come first serve basis and we
1617 * must process each one atomically.
1619 static void reg_process_pending_hints(void)
1621 struct regulatory_request
*reg_request
;
1623 mutex_lock(&cfg80211_mutex
);
1624 mutex_lock(®_mutex
);
1626 /* When last_request->processed becomes true this will be rescheduled */
1627 if (last_request
&& !last_request
->processed
) {
1628 REG_DBG_PRINT("Pending regulatory request, waiting "
1629 "for it to be processed...\n");
1633 spin_lock(®_requests_lock
);
1635 if (list_empty(®_requests_list
)) {
1636 spin_unlock(®_requests_lock
);
1640 reg_request
= list_first_entry(®_requests_list
,
1641 struct regulatory_request
,
1643 list_del_init(®_request
->list
);
1645 spin_unlock(®_requests_lock
);
1647 reg_process_hint(reg_request
, reg_request
->initiator
);
1650 mutex_unlock(®_mutex
);
1651 mutex_unlock(&cfg80211_mutex
);
1654 /* Processes beacon hints -- this has nothing to do with country IEs */
1655 static void reg_process_pending_beacon_hints(void)
1657 struct cfg80211_registered_device
*rdev
;
1658 struct reg_beacon
*pending_beacon
, *tmp
;
1661 * No need to hold the reg_mutex here as we just touch wiphys
1662 * and do not read or access regulatory variables.
1664 mutex_lock(&cfg80211_mutex
);
1666 /* This goes through the _pending_ beacon list */
1667 spin_lock_bh(®_pending_beacons_lock
);
1669 if (list_empty(®_pending_beacons
)) {
1670 spin_unlock_bh(®_pending_beacons_lock
);
1674 list_for_each_entry_safe(pending_beacon
, tmp
,
1675 ®_pending_beacons
, list
) {
1677 list_del_init(&pending_beacon
->list
);
1679 /* Applies the beacon hint to current wiphys */
1680 list_for_each_entry(rdev
, &cfg80211_rdev_list
, list
)
1681 wiphy_update_new_beacon(&rdev
->wiphy
, pending_beacon
);
1683 /* Remembers the beacon hint for new wiphys or reg changes */
1684 list_add_tail(&pending_beacon
->list
, ®_beacon_list
);
1687 spin_unlock_bh(®_pending_beacons_lock
);
1689 mutex_unlock(&cfg80211_mutex
);
1692 static void reg_todo(struct work_struct
*work
)
1694 reg_process_pending_hints();
1695 reg_process_pending_beacon_hints();
1698 static void queue_regulatory_request(struct regulatory_request
*request
)
1700 if (isalpha(request
->alpha2
[0]))
1701 request
->alpha2
[0] = toupper(request
->alpha2
[0]);
1702 if (isalpha(request
->alpha2
[1]))
1703 request
->alpha2
[1] = toupper(request
->alpha2
[1]);
1705 spin_lock(®_requests_lock
);
1706 list_add_tail(&request
->list
, ®_requests_list
);
1707 spin_unlock(®_requests_lock
);
1709 schedule_work(®_work
);
1713 * Core regulatory hint -- happens during cfg80211_init()
1714 * and when we restore regulatory settings.
1716 static int regulatory_hint_core(const char *alpha2
)
1718 struct regulatory_request
*request
;
1720 request
= kzalloc(sizeof(struct regulatory_request
),
1725 request
->alpha2
[0] = alpha2
[0];
1726 request
->alpha2
[1] = alpha2
[1];
1727 request
->initiator
= NL80211_REGDOM_SET_BY_CORE
;
1729 queue_regulatory_request(request
);
1735 int regulatory_hint_user(const char *alpha2
,
1736 enum nl80211_user_reg_hint_type user_reg_hint_type
)
1738 struct regulatory_request
*request
;
1742 request
= kzalloc(sizeof(struct regulatory_request
), GFP_KERNEL
);
1746 request
->wiphy_idx
= WIPHY_IDX_STALE
;
1747 request
->alpha2
[0] = alpha2
[0];
1748 request
->alpha2
[1] = alpha2
[1];
1749 request
->initiator
= NL80211_REGDOM_SET_BY_USER
;
1750 request
->user_reg_hint_type
= user_reg_hint_type
;
1752 queue_regulatory_request(request
);
1758 int regulatory_hint(struct wiphy
*wiphy
, const char *alpha2
)
1760 struct regulatory_request
*request
;
1765 request
= kzalloc(sizeof(struct regulatory_request
), GFP_KERNEL
);
1769 request
->wiphy_idx
= get_wiphy_idx(wiphy
);
1771 /* Must have registered wiphy first */
1772 BUG_ON(!wiphy_idx_valid(request
->wiphy_idx
));
1774 request
->alpha2
[0] = alpha2
[0];
1775 request
->alpha2
[1] = alpha2
[1];
1776 request
->initiator
= NL80211_REGDOM_SET_BY_DRIVER
;
1778 queue_regulatory_request(request
);
1782 EXPORT_SYMBOL(regulatory_hint
);
1785 * We hold wdev_lock() here so we cannot hold cfg80211_mutex() and
1786 * therefore cannot iterate over the rdev list here.
1788 void regulatory_hint_11d(struct wiphy
*wiphy
,
1789 enum ieee80211_band band
,
1794 enum environment_cap env
= ENVIRON_ANY
;
1795 struct regulatory_request
*request
;
1797 mutex_lock(®_mutex
);
1799 if (unlikely(!last_request
))
1802 /* IE len must be evenly divisible by 2 */
1803 if (country_ie_len
& 0x01)
1806 if (country_ie_len
< IEEE80211_COUNTRY_IE_MIN_LEN
)
1809 alpha2
[0] = country_ie
[0];
1810 alpha2
[1] = country_ie
[1];
1812 if (country_ie
[2] == 'I')
1813 env
= ENVIRON_INDOOR
;
1814 else if (country_ie
[2] == 'O')
1815 env
= ENVIRON_OUTDOOR
;
1818 * We will run this only upon a successful connection on cfg80211.
1819 * We leave conflict resolution to the workqueue, where can hold
1822 if (likely(last_request
->initiator
==
1823 NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
1824 wiphy_idx_valid(last_request
->wiphy_idx
)))
1827 request
= kzalloc(sizeof(struct regulatory_request
), GFP_KERNEL
);
1831 request
->wiphy_idx
= get_wiphy_idx(wiphy
);
1832 request
->alpha2
[0] = alpha2
[0];
1833 request
->alpha2
[1] = alpha2
[1];
1834 request
->initiator
= NL80211_REGDOM_SET_BY_COUNTRY_IE
;
1835 request
->country_ie_env
= env
;
1837 mutex_unlock(®_mutex
);
1839 queue_regulatory_request(request
);
1844 mutex_unlock(®_mutex
);
1847 static void restore_alpha2(char *alpha2
, bool reset_user
)
1849 /* indicates there is no alpha2 to consider for restoration */
1853 /* The user setting has precedence over the module parameter */
1854 if (is_user_regdom_saved()) {
1855 /* Unless we're asked to ignore it and reset it */
1857 REG_DBG_PRINT("Restoring regulatory settings "
1858 "including user preference\n");
1859 user_alpha2
[0] = '9';
1860 user_alpha2
[1] = '7';
1863 * If we're ignoring user settings, we still need to
1864 * check the module parameter to ensure we put things
1865 * back as they were for a full restore.
1867 if (!is_world_regdom(ieee80211_regdom
)) {
1868 REG_DBG_PRINT("Keeping preference on "
1869 "module parameter ieee80211_regdom: %c%c\n",
1870 ieee80211_regdom
[0],
1871 ieee80211_regdom
[1]);
1872 alpha2
[0] = ieee80211_regdom
[0];
1873 alpha2
[1] = ieee80211_regdom
[1];
1876 REG_DBG_PRINT("Restoring regulatory settings "
1877 "while preserving user preference for: %c%c\n",
1880 alpha2
[0] = user_alpha2
[0];
1881 alpha2
[1] = user_alpha2
[1];
1883 } else if (!is_world_regdom(ieee80211_regdom
)) {
1884 REG_DBG_PRINT("Keeping preference on "
1885 "module parameter ieee80211_regdom: %c%c\n",
1886 ieee80211_regdom
[0],
1887 ieee80211_regdom
[1]);
1888 alpha2
[0] = ieee80211_regdom
[0];
1889 alpha2
[1] = ieee80211_regdom
[1];
1891 REG_DBG_PRINT("Restoring regulatory settings\n");
1894 static void restore_custom_reg_settings(struct wiphy
*wiphy
)
1896 struct ieee80211_supported_band
*sband
;
1897 enum ieee80211_band band
;
1898 struct ieee80211_channel
*chan
;
1901 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++) {
1902 sband
= wiphy
->bands
[band
];
1905 for (i
= 0; i
< sband
->n_channels
; i
++) {
1906 chan
= &sband
->channels
[i
];
1907 chan
->flags
= chan
->orig_flags
;
1908 chan
->max_antenna_gain
= chan
->orig_mag
;
1909 chan
->max_power
= chan
->orig_mpwr
;
1910 chan
->beacon_found
= false;
1916 * Restoring regulatory settings involves ingoring any
1917 * possibly stale country IE information and user regulatory
1918 * settings if so desired, this includes any beacon hints
1919 * learned as we could have traveled outside to another country
1920 * after disconnection. To restore regulatory settings we do
1921 * exactly what we did at bootup:
1923 * - send a core regulatory hint
1924 * - send a user regulatory hint if applicable
1926 * Device drivers that send a regulatory hint for a specific country
1927 * keep their own regulatory domain on wiphy->regd so that does does
1928 * not need to be remembered.
1930 static void restore_regulatory_settings(bool reset_user
)
1933 char world_alpha2
[2];
1934 struct reg_beacon
*reg_beacon
, *btmp
;
1935 struct regulatory_request
*reg_request
, *tmp
;
1936 LIST_HEAD(tmp_reg_req_list
);
1937 struct cfg80211_registered_device
*rdev
;
1939 mutex_lock(&cfg80211_mutex
);
1940 mutex_lock(®_mutex
);
1942 reset_regdomains(true);
1943 restore_alpha2(alpha2
, reset_user
);
1946 * If there's any pending requests we simply
1947 * stash them to a temporary pending queue and
1948 * add then after we've restored regulatory
1951 spin_lock(®_requests_lock
);
1952 if (!list_empty(®_requests_list
)) {
1953 list_for_each_entry_safe(reg_request
, tmp
,
1954 ®_requests_list
, list
) {
1955 if (reg_request
->initiator
!=
1956 NL80211_REGDOM_SET_BY_USER
)
1958 list_del(®_request
->list
);
1959 list_add_tail(®_request
->list
, &tmp_reg_req_list
);
1962 spin_unlock(®_requests_lock
);
1964 /* Clear beacon hints */
1965 spin_lock_bh(®_pending_beacons_lock
);
1966 if (!list_empty(®_pending_beacons
)) {
1967 list_for_each_entry_safe(reg_beacon
, btmp
,
1968 ®_pending_beacons
, list
) {
1969 list_del(®_beacon
->list
);
1973 spin_unlock_bh(®_pending_beacons_lock
);
1975 if (!list_empty(®_beacon_list
)) {
1976 list_for_each_entry_safe(reg_beacon
, btmp
,
1977 ®_beacon_list
, list
) {
1978 list_del(®_beacon
->list
);
1983 /* First restore to the basic regulatory settings */
1984 cfg80211_regdomain
= cfg80211_world_regdom
;
1985 world_alpha2
[0] = cfg80211_regdomain
->alpha2
[0];
1986 world_alpha2
[1] = cfg80211_regdomain
->alpha2
[1];
1988 list_for_each_entry(rdev
, &cfg80211_rdev_list
, list
) {
1989 if (rdev
->wiphy
.flags
& WIPHY_FLAG_CUSTOM_REGULATORY
)
1990 restore_custom_reg_settings(&rdev
->wiphy
);
1993 mutex_unlock(®_mutex
);
1994 mutex_unlock(&cfg80211_mutex
);
1996 regulatory_hint_core(world_alpha2
);
1999 * This restores the ieee80211_regdom module parameter
2000 * preference or the last user requested regulatory
2001 * settings, user regulatory settings takes precedence.
2003 if (is_an_alpha2(alpha2
))
2004 regulatory_hint_user(user_alpha2
, NL80211_USER_REG_HINT_USER
);
2006 if (list_empty(&tmp_reg_req_list
))
2009 mutex_lock(&cfg80211_mutex
);
2010 mutex_lock(®_mutex
);
2012 spin_lock(®_requests_lock
);
2013 list_for_each_entry_safe(reg_request
, tmp
, &tmp_reg_req_list
, list
) {
2014 REG_DBG_PRINT("Adding request for country %c%c back "
2016 reg_request
->alpha2
[0],
2017 reg_request
->alpha2
[1]);
2018 list_del(®_request
->list
);
2019 list_add_tail(®_request
->list
, ®_requests_list
);
2021 spin_unlock(®_requests_lock
);
2023 mutex_unlock(®_mutex
);
2024 mutex_unlock(&cfg80211_mutex
);
2026 REG_DBG_PRINT("Kicking the queue\n");
2028 schedule_work(®_work
);
2031 void regulatory_hint_disconnect(void)
2033 REG_DBG_PRINT("All devices are disconnected, going to "
2034 "restore regulatory settings\n");
2035 restore_regulatory_settings(false);
2038 static bool freq_is_chan_12_13_14(u16 freq
)
2040 if (freq
== ieee80211_channel_to_frequency(12, IEEE80211_BAND_2GHZ
) ||
2041 freq
== ieee80211_channel_to_frequency(13, IEEE80211_BAND_2GHZ
) ||
2042 freq
== ieee80211_channel_to_frequency(14, IEEE80211_BAND_2GHZ
))
2047 int regulatory_hint_found_beacon(struct wiphy
*wiphy
,
2048 struct ieee80211_channel
*beacon_chan
,
2051 struct reg_beacon
*reg_beacon
;
2053 if (likely((beacon_chan
->beacon_found
||
2054 (beacon_chan
->flags
& IEEE80211_CHAN_RADAR
) ||
2055 (beacon_chan
->band
== IEEE80211_BAND_2GHZ
&&
2056 !freq_is_chan_12_13_14(beacon_chan
->center_freq
)))))
2059 reg_beacon
= kzalloc(sizeof(struct reg_beacon
), gfp
);
2063 REG_DBG_PRINT("Found new beacon on "
2064 "frequency: %d MHz (Ch %d) on %s\n",
2065 beacon_chan
->center_freq
,
2066 ieee80211_frequency_to_channel(beacon_chan
->center_freq
),
2069 memcpy(®_beacon
->chan
, beacon_chan
,
2070 sizeof(struct ieee80211_channel
));
2074 * Since we can be called from BH or and non-BH context
2075 * we must use spin_lock_bh()
2077 spin_lock_bh(®_pending_beacons_lock
);
2078 list_add_tail(®_beacon
->list
, ®_pending_beacons
);
2079 spin_unlock_bh(®_pending_beacons_lock
);
2081 schedule_work(®_work
);
2086 static void print_rd_rules(const struct ieee80211_regdomain
*rd
)
2089 const struct ieee80211_reg_rule
*reg_rule
= NULL
;
2090 const struct ieee80211_freq_range
*freq_range
= NULL
;
2091 const struct ieee80211_power_rule
*power_rule
= NULL
;
2093 pr_info(" (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)\n");
2095 for (i
= 0; i
< rd
->n_reg_rules
; i
++) {
2096 reg_rule
= &rd
->reg_rules
[i
];
2097 freq_range
= ®_rule
->freq_range
;
2098 power_rule
= ®_rule
->power_rule
;
2101 * There may not be documentation for max antenna gain
2102 * in certain regions
2104 if (power_rule
->max_antenna_gain
)
2105 pr_info(" (%d KHz - %d KHz @ %d KHz), (%d mBi, %d mBm)\n",
2106 freq_range
->start_freq_khz
,
2107 freq_range
->end_freq_khz
,
2108 freq_range
->max_bandwidth_khz
,
2109 power_rule
->max_antenna_gain
,
2110 power_rule
->max_eirp
);
2112 pr_info(" (%d KHz - %d KHz @ %d KHz), (N/A, %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_eirp
);
2120 bool reg_supported_dfs_region(u8 dfs_region
)
2122 switch (dfs_region
) {
2123 case NL80211_DFS_UNSET
:
2124 case NL80211_DFS_FCC
:
2125 case NL80211_DFS_ETSI
:
2126 case NL80211_DFS_JP
:
2129 REG_DBG_PRINT("Ignoring uknown DFS master region: %d\n",
2135 static void print_dfs_region(u8 dfs_region
)
2140 switch (dfs_region
) {
2141 case NL80211_DFS_FCC
:
2142 pr_info(" DFS Master region FCC");
2144 case NL80211_DFS_ETSI
:
2145 pr_info(" DFS Master region ETSI");
2147 case NL80211_DFS_JP
:
2148 pr_info(" DFS Master region JP");
2151 pr_info(" DFS Master region Uknown");
2156 static void print_regdomain(const struct ieee80211_regdomain
*rd
)
2159 if (is_intersected_alpha2(rd
->alpha2
)) {
2161 if (last_request
->initiator
==
2162 NL80211_REGDOM_SET_BY_COUNTRY_IE
) {
2163 struct cfg80211_registered_device
*rdev
;
2164 rdev
= cfg80211_rdev_by_wiphy_idx(
2165 last_request
->wiphy_idx
);
2167 pr_info("Current regulatory domain updated by AP to: %c%c\n",
2168 rdev
->country_ie_alpha2
[0],
2169 rdev
->country_ie_alpha2
[1]);
2171 pr_info("Current regulatory domain intersected:\n");
2173 pr_info("Current regulatory domain intersected:\n");
2174 } else if (is_world_regdom(rd
->alpha2
))
2175 pr_info("World regulatory domain updated:\n");
2177 if (is_unknown_alpha2(rd
->alpha2
))
2178 pr_info("Regulatory domain changed to driver built-in settings (unknown country)\n");
2180 if (reg_request_cell_base(last_request
))
2181 pr_info("Regulatory domain changed "
2182 "to country: %c%c by Cell Station\n",
2183 rd
->alpha2
[0], rd
->alpha2
[1]);
2185 pr_info("Regulatory domain changed "
2186 "to country: %c%c\n",
2187 rd
->alpha2
[0], rd
->alpha2
[1]);
2190 print_dfs_region(rd
->dfs_region
);
2194 static void print_regdomain_info(const struct ieee80211_regdomain
*rd
)
2196 pr_info("Regulatory domain: %c%c\n", rd
->alpha2
[0], rd
->alpha2
[1]);
2200 /* Takes ownership of rd only if it doesn't fail */
2201 static int __set_regdom(const struct ieee80211_regdomain
*rd
)
2203 const struct ieee80211_regdomain
*intersected_rd
= NULL
;
2204 struct cfg80211_registered_device
*rdev
= NULL
;
2205 struct wiphy
*request_wiphy
;
2206 /* Some basic sanity checks first */
2208 if (is_world_regdom(rd
->alpha2
)) {
2209 if (WARN_ON(!reg_is_valid_request(rd
->alpha2
)))
2211 update_world_regdomain(rd
);
2215 if (!is_alpha2_set(rd
->alpha2
) && !is_an_alpha2(rd
->alpha2
) &&
2216 !is_unknown_alpha2(rd
->alpha2
))
2223 * Lets only bother proceeding on the same alpha2 if the current
2224 * rd is non static (it means CRDA was present and was used last)
2225 * and the pending request came in from a country IE
2227 if (last_request
->initiator
!= NL80211_REGDOM_SET_BY_COUNTRY_IE
) {
2229 * If someone else asked us to change the rd lets only bother
2230 * checking if the alpha2 changes if CRDA was already called
2232 if (!regdom_changes(rd
->alpha2
))
2237 * Now lets set the regulatory domain, update all driver channels
2238 * and finally inform them of what we have done, in case they want
2239 * to review or adjust their own settings based on their own
2240 * internal EEPROM data
2243 if (WARN_ON(!reg_is_valid_request(rd
->alpha2
)))
2246 if (!is_valid_rd(rd
)) {
2247 pr_err("Invalid regulatory domain detected:\n");
2248 print_regdomain_info(rd
);
2252 request_wiphy
= wiphy_idx_to_wiphy(last_request
->wiphy_idx
);
2253 if (!request_wiphy
&&
2254 (last_request
->initiator
== NL80211_REGDOM_SET_BY_DRIVER
||
2255 last_request
->initiator
== NL80211_REGDOM_SET_BY_COUNTRY_IE
)) {
2256 schedule_delayed_work(®_timeout
, 0);
2260 if (!last_request
->intersect
) {
2263 if (last_request
->initiator
!= NL80211_REGDOM_SET_BY_DRIVER
) {
2264 reset_regdomains(false);
2265 cfg80211_regdomain
= rd
;
2270 * For a driver hint, lets copy the regulatory domain the
2271 * driver wanted to the wiphy to deal with conflicts
2275 * Userspace could have sent two replies with only
2276 * one kernel request.
2278 if (request_wiphy
->regd
)
2281 r
= reg_copy_regd(&request_wiphy
->regd
, rd
);
2285 reset_regdomains(false);
2286 cfg80211_regdomain
= rd
;
2290 /* Intersection requires a bit more work */
2292 if (last_request
->initiator
!= NL80211_REGDOM_SET_BY_COUNTRY_IE
) {
2294 intersected_rd
= regdom_intersect(rd
, cfg80211_regdomain
);
2295 if (!intersected_rd
)
2299 * We can trash what CRDA provided now.
2300 * However if a driver requested this specific regulatory
2301 * domain we keep it for its private use
2303 if (last_request
->initiator
== NL80211_REGDOM_SET_BY_DRIVER
)
2304 request_wiphy
->regd
= rd
;
2310 reset_regdomains(false);
2311 cfg80211_regdomain
= intersected_rd
;
2316 if (!intersected_rd
)
2319 rdev
= wiphy_to_dev(request_wiphy
);
2321 rdev
->country_ie_alpha2
[0] = rd
->alpha2
[0];
2322 rdev
->country_ie_alpha2
[1] = rd
->alpha2
[1];
2323 rdev
->env
= last_request
->country_ie_env
;
2325 BUG_ON(intersected_rd
== rd
);
2330 reset_regdomains(false);
2331 cfg80211_regdomain
= intersected_rd
;
2338 * Use this call to set the current regulatory domain. Conflicts with
2339 * multiple drivers can be ironed out later. Caller must've already
2340 * kmalloc'd the rd structure. Caller must hold cfg80211_mutex
2342 int set_regdom(const struct ieee80211_regdomain
*rd
)
2346 assert_cfg80211_lock();
2348 mutex_lock(®_mutex
);
2350 /* Note that this doesn't update the wiphys, this is done below */
2351 r
= __set_regdom(rd
);
2354 reg_set_request_processed();
2357 mutex_unlock(®_mutex
);
2361 /* This would make this whole thing pointless */
2362 if (!last_request
->intersect
)
2363 BUG_ON(rd
!= cfg80211_regdomain
);
2365 /* update all wiphys now with the new established regulatory domain */
2366 update_all_wiphy_regulatory(last_request
->initiator
);
2368 print_regdomain(cfg80211_regdomain
);
2370 nl80211_send_reg_change_event(last_request
);
2372 reg_set_request_processed();
2374 mutex_unlock(®_mutex
);
2379 #ifdef CONFIG_HOTPLUG
2380 int reg_device_uevent(struct device
*dev
, struct kobj_uevent_env
*env
)
2382 if (last_request
&& !last_request
->processed
) {
2383 if (add_uevent_var(env
, "COUNTRY=%c%c",
2384 last_request
->alpha2
[0],
2385 last_request
->alpha2
[1]))
2392 int reg_device_uevent(struct device
*dev
, struct kobj_uevent_env
*env
)
2396 #endif /* CONFIG_HOTPLUG */
2398 void wiphy_regulatory_register(struct wiphy
*wiphy
)
2400 assert_cfg80211_lock();
2402 mutex_lock(®_mutex
);
2404 if (!reg_dev_ignore_cell_hint(wiphy
))
2405 reg_num_devs_support_basehint
++;
2407 wiphy_update_regulatory(wiphy
, NL80211_REGDOM_SET_BY_CORE
);
2409 mutex_unlock(®_mutex
);
2412 /* Caller must hold cfg80211_mutex */
2413 void wiphy_regulatory_deregister(struct wiphy
*wiphy
)
2415 struct wiphy
*request_wiphy
= NULL
;
2417 assert_cfg80211_lock();
2419 mutex_lock(®_mutex
);
2421 if (!reg_dev_ignore_cell_hint(wiphy
))
2422 reg_num_devs_support_basehint
--;
2427 request_wiphy
= wiphy_idx_to_wiphy(last_request
->wiphy_idx
);
2429 if (!request_wiphy
|| request_wiphy
!= wiphy
)
2432 last_request
->wiphy_idx
= WIPHY_IDX_STALE
;
2433 last_request
->country_ie_env
= ENVIRON_ANY
;
2435 mutex_unlock(®_mutex
);
2438 static void reg_timeout_work(struct work_struct
*work
)
2440 REG_DBG_PRINT("Timeout while waiting for CRDA to reply, "
2441 "restoring regulatory settings\n");
2442 restore_regulatory_settings(true);
2445 int __init
regulatory_init(void)
2449 reg_pdev
= platform_device_register_simple("regulatory", 0, NULL
, 0);
2450 if (IS_ERR(reg_pdev
))
2451 return PTR_ERR(reg_pdev
);
2453 reg_pdev
->dev
.type
= ®_device_type
;
2455 spin_lock_init(®_requests_lock
);
2456 spin_lock_init(®_pending_beacons_lock
);
2458 reg_regdb_size_check();
2460 cfg80211_regdomain
= cfg80211_world_regdom
;
2462 user_alpha2
[0] = '9';
2463 user_alpha2
[1] = '7';
2465 /* We always try to get an update for the static regdomain */
2466 err
= regulatory_hint_core(cfg80211_regdomain
->alpha2
);
2471 * N.B. kobject_uevent_env() can fail mainly for when we're out
2472 * memory which is handled and propagated appropriately above
2473 * but it can also fail during a netlink_broadcast() or during
2474 * early boot for call_usermodehelper(). For now treat these
2475 * errors as non-fatal.
2477 pr_err("kobject_uevent_env() was unable to call CRDA during init\n");
2478 #ifdef CONFIG_CFG80211_REG_DEBUG
2479 /* We want to find out exactly why when debugging */
2485 * Finally, if the user set the module parameter treat it
2488 if (!is_world_regdom(ieee80211_regdom
))
2489 regulatory_hint_user(ieee80211_regdom
,
2490 NL80211_USER_REG_HINT_USER
);
2495 void /* __init_or_exit */ regulatory_exit(void)
2497 struct regulatory_request
*reg_request
, *tmp
;
2498 struct reg_beacon
*reg_beacon
, *btmp
;
2500 cancel_work_sync(®_work
);
2501 cancel_delayed_work_sync(®_timeout
);
2503 mutex_lock(&cfg80211_mutex
);
2504 mutex_lock(®_mutex
);
2506 reset_regdomains(true);
2508 dev_set_uevent_suppress(®_pdev
->dev
, true);
2510 platform_device_unregister(reg_pdev
);
2512 spin_lock_bh(®_pending_beacons_lock
);
2513 if (!list_empty(®_pending_beacons
)) {
2514 list_for_each_entry_safe(reg_beacon
, btmp
,
2515 ®_pending_beacons
, list
) {
2516 list_del(®_beacon
->list
);
2520 spin_unlock_bh(®_pending_beacons_lock
);
2522 if (!list_empty(®_beacon_list
)) {
2523 list_for_each_entry_safe(reg_beacon
, btmp
,
2524 ®_beacon_list
, list
) {
2525 list_del(®_beacon
->list
);
2530 spin_lock(®_requests_lock
);
2531 if (!list_empty(®_requests_list
)) {
2532 list_for_each_entry_safe(reg_request
, tmp
,
2533 ®_requests_list
, list
) {
2534 list_del(®_request
->list
);
2538 spin_unlock(®_requests_lock
);
2540 mutex_unlock(®_mutex
);
2541 mutex_unlock(&cfg80211_mutex
);