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
;
354 mutex_lock(®_regdb_search_mutex
);
355 while (!list_empty(®_regdb_search_list
)) {
356 request
= list_first_entry(®_regdb_search_list
,
357 struct reg_regdb_search_request
,
359 list_del(&request
->list
);
361 for (i
=0; i
<reg_regdb_size
; i
++) {
362 curdom
= reg_regdb
[i
];
364 if (!memcmp(request
->alpha2
, curdom
->alpha2
, 2)) {
365 r
= reg_copy_regd(®dom
, curdom
);
368 mutex_lock(&cfg80211_mutex
);
370 mutex_unlock(&cfg80211_mutex
);
377 mutex_unlock(®_regdb_search_mutex
);
380 static DECLARE_WORK(reg_regdb_work
, reg_regdb_search
);
382 static void reg_regdb_query(const char *alpha2
)
384 struct reg_regdb_search_request
*request
;
389 request
= kzalloc(sizeof(struct reg_regdb_search_request
), GFP_KERNEL
);
393 memcpy(request
->alpha2
, alpha2
, 2);
395 mutex_lock(®_regdb_search_mutex
);
396 list_add_tail(&request
->list
, ®_regdb_search_list
);
397 mutex_unlock(®_regdb_search_mutex
);
399 schedule_work(®_regdb_work
);
402 /* Feel free to add any other sanity checks here */
403 static void reg_regdb_size_check(void)
405 /* We should ideally BUILD_BUG_ON() but then random builds would fail */
406 WARN_ONCE(!reg_regdb_size
, "db.txt is empty, you should update it...");
409 static inline void reg_regdb_size_check(void) {}
410 static inline void reg_regdb_query(const char *alpha2
) {}
411 #endif /* CONFIG_CFG80211_INTERNAL_REGDB */
414 * This lets us keep regulatory code which is updated on a regulatory
415 * basis in userspace. Country information is filled in by
418 static int call_crda(const char *alpha2
)
420 if (!is_world_regdom((char *) alpha2
))
421 pr_info("Calling CRDA for country: %c%c\n",
422 alpha2
[0], alpha2
[1]);
424 pr_info("Calling CRDA to update world regulatory domain\n");
426 /* query internal regulatory database (if it exists) */
427 reg_regdb_query(alpha2
);
429 return kobject_uevent(®_pdev
->dev
.kobj
, KOBJ_CHANGE
);
432 /* Used by nl80211 before kmalloc'ing our regulatory domain */
433 bool reg_is_valid_request(const char *alpha2
)
435 assert_cfg80211_lock();
440 return alpha2_equal(last_request
->alpha2
, alpha2
);
443 /* Sanity check on a regulatory rule */
444 static bool is_valid_reg_rule(const struct ieee80211_reg_rule
*rule
)
446 const struct ieee80211_freq_range
*freq_range
= &rule
->freq_range
;
449 if (freq_range
->start_freq_khz
<= 0 || freq_range
->end_freq_khz
<= 0)
452 if (freq_range
->start_freq_khz
> freq_range
->end_freq_khz
)
455 freq_diff
= freq_range
->end_freq_khz
- freq_range
->start_freq_khz
;
457 if (freq_range
->end_freq_khz
<= freq_range
->start_freq_khz
||
458 freq_range
->max_bandwidth_khz
> freq_diff
)
464 static bool is_valid_rd(const struct ieee80211_regdomain
*rd
)
466 const struct ieee80211_reg_rule
*reg_rule
= NULL
;
469 if (!rd
->n_reg_rules
)
472 if (WARN_ON(rd
->n_reg_rules
> NL80211_MAX_SUPP_REG_RULES
))
475 for (i
= 0; i
< rd
->n_reg_rules
; i
++) {
476 reg_rule
= &rd
->reg_rules
[i
];
477 if (!is_valid_reg_rule(reg_rule
))
484 static bool reg_does_bw_fit(const struct ieee80211_freq_range
*freq_range
,
488 u32 start_freq_khz
, end_freq_khz
;
490 start_freq_khz
= center_freq_khz
- (bw_khz
/2);
491 end_freq_khz
= center_freq_khz
+ (bw_khz
/2);
493 if (start_freq_khz
>= freq_range
->start_freq_khz
&&
494 end_freq_khz
<= freq_range
->end_freq_khz
)
501 * freq_in_rule_band - tells us if a frequency is in a frequency band
502 * @freq_range: frequency rule we want to query
503 * @freq_khz: frequency we are inquiring about
505 * This lets us know if a specific frequency rule is or is not relevant to
506 * a specific frequency's band. Bands are device specific and artificial
507 * definitions (the "2.4 GHz band" and the "5 GHz band"), however it is
508 * safe for now to assume that a frequency rule should not be part of a
509 * frequency's band if the start freq or end freq are off by more than 2 GHz.
510 * This resolution can be lowered and should be considered as we add
511 * regulatory rule support for other "bands".
513 static bool freq_in_rule_band(const struct ieee80211_freq_range
*freq_range
,
516 #define ONE_GHZ_IN_KHZ 1000000
517 if (abs(freq_khz
- freq_range
->start_freq_khz
) <= (2 * ONE_GHZ_IN_KHZ
))
519 if (abs(freq_khz
- freq_range
->end_freq_khz
) <= (2 * ONE_GHZ_IN_KHZ
))
522 #undef ONE_GHZ_IN_KHZ
526 * Helper for regdom_intersect(), this does the real
527 * mathematical intersection fun
529 static int reg_rules_intersect(
530 const struct ieee80211_reg_rule
*rule1
,
531 const struct ieee80211_reg_rule
*rule2
,
532 struct ieee80211_reg_rule
*intersected_rule
)
534 const struct ieee80211_freq_range
*freq_range1
, *freq_range2
;
535 struct ieee80211_freq_range
*freq_range
;
536 const struct ieee80211_power_rule
*power_rule1
, *power_rule2
;
537 struct ieee80211_power_rule
*power_rule
;
540 freq_range1
= &rule1
->freq_range
;
541 freq_range2
= &rule2
->freq_range
;
542 freq_range
= &intersected_rule
->freq_range
;
544 power_rule1
= &rule1
->power_rule
;
545 power_rule2
= &rule2
->power_rule
;
546 power_rule
= &intersected_rule
->power_rule
;
548 freq_range
->start_freq_khz
= max(freq_range1
->start_freq_khz
,
549 freq_range2
->start_freq_khz
);
550 freq_range
->end_freq_khz
= min(freq_range1
->end_freq_khz
,
551 freq_range2
->end_freq_khz
);
552 freq_range
->max_bandwidth_khz
= min(freq_range1
->max_bandwidth_khz
,
553 freq_range2
->max_bandwidth_khz
);
555 freq_diff
= freq_range
->end_freq_khz
- freq_range
->start_freq_khz
;
556 if (freq_range
->max_bandwidth_khz
> freq_diff
)
557 freq_range
->max_bandwidth_khz
= freq_diff
;
559 power_rule
->max_eirp
= min(power_rule1
->max_eirp
,
560 power_rule2
->max_eirp
);
561 power_rule
->max_antenna_gain
= min(power_rule1
->max_antenna_gain
,
562 power_rule2
->max_antenna_gain
);
564 intersected_rule
->flags
= (rule1
->flags
| rule2
->flags
);
566 if (!is_valid_reg_rule(intersected_rule
))
573 * regdom_intersect - do the intersection between two regulatory domains
574 * @rd1: first regulatory domain
575 * @rd2: second regulatory domain
577 * Use this function to get the intersection between two regulatory domains.
578 * Once completed we will mark the alpha2 for the rd as intersected, "98",
579 * as no one single alpha2 can represent this regulatory domain.
581 * Returns a pointer to the regulatory domain structure which will hold the
582 * resulting intersection of rules between rd1 and rd2. We will
583 * kzalloc() this structure for you.
585 static struct ieee80211_regdomain
*regdom_intersect(
586 const struct ieee80211_regdomain
*rd1
,
587 const struct ieee80211_regdomain
*rd2
)
591 unsigned int num_rules
= 0, rule_idx
= 0;
592 const struct ieee80211_reg_rule
*rule1
, *rule2
;
593 struct ieee80211_reg_rule
*intersected_rule
;
594 struct ieee80211_regdomain
*rd
;
595 /* This is just a dummy holder to help us count */
596 struct ieee80211_reg_rule irule
;
598 /* Uses the stack temporarily for counter arithmetic */
599 intersected_rule
= &irule
;
601 memset(intersected_rule
, 0, sizeof(struct ieee80211_reg_rule
));
607 * First we get a count of the rules we'll need, then we actually
608 * build them. This is to so we can malloc() and free() a
609 * regdomain once. The reason we use reg_rules_intersect() here
610 * is it will return -EINVAL if the rule computed makes no sense.
611 * All rules that do check out OK are valid.
614 for (x
= 0; x
< rd1
->n_reg_rules
; x
++) {
615 rule1
= &rd1
->reg_rules
[x
];
616 for (y
= 0; y
< rd2
->n_reg_rules
; y
++) {
617 rule2
= &rd2
->reg_rules
[y
];
618 if (!reg_rules_intersect(rule1
, rule2
,
621 memset(intersected_rule
, 0,
622 sizeof(struct ieee80211_reg_rule
));
629 size_of_regd
= sizeof(struct ieee80211_regdomain
) +
630 ((num_rules
+ 1) * sizeof(struct ieee80211_reg_rule
));
632 rd
= kzalloc(size_of_regd
, GFP_KERNEL
);
636 for (x
= 0; x
< rd1
->n_reg_rules
; x
++) {
637 rule1
= &rd1
->reg_rules
[x
];
638 for (y
= 0; y
< rd2
->n_reg_rules
; y
++) {
639 rule2
= &rd2
->reg_rules
[y
];
641 * This time around instead of using the stack lets
642 * write to the target rule directly saving ourselves
645 intersected_rule
= &rd
->reg_rules
[rule_idx
];
646 r
= reg_rules_intersect(rule1
, rule2
,
649 * No need to memset here the intersected rule here as
650 * we're not using the stack anymore
658 if (rule_idx
!= num_rules
) {
663 rd
->n_reg_rules
= num_rules
;
671 * XXX: add support for the rest of enum nl80211_reg_rule_flags, we may
672 * want to just have the channel structure use these
674 static u32
map_regdom_flags(u32 rd_flags
)
676 u32 channel_flags
= 0;
677 if (rd_flags
& NL80211_RRF_PASSIVE_SCAN
)
678 channel_flags
|= IEEE80211_CHAN_PASSIVE_SCAN
;
679 if (rd_flags
& NL80211_RRF_NO_IBSS
)
680 channel_flags
|= IEEE80211_CHAN_NO_IBSS
;
681 if (rd_flags
& NL80211_RRF_DFS
)
682 channel_flags
|= IEEE80211_CHAN_RADAR
;
683 return channel_flags
;
686 static int freq_reg_info_regd(struct wiphy
*wiphy
,
689 const struct ieee80211_reg_rule
**reg_rule
,
690 const struct ieee80211_regdomain
*custom_regd
)
693 bool band_rule_found
= false;
694 const struct ieee80211_regdomain
*regd
;
695 bool bw_fits
= false;
698 desired_bw_khz
= MHZ_TO_KHZ(20);
700 regd
= custom_regd
? custom_regd
: cfg80211_regdomain
;
703 * Follow the driver's regulatory domain, if present, unless a country
704 * IE has been processed or a user wants to help complaince further
707 last_request
->initiator
!= NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
708 last_request
->initiator
!= NL80211_REGDOM_SET_BY_USER
&&
715 for (i
= 0; i
< regd
->n_reg_rules
; i
++) {
716 const struct ieee80211_reg_rule
*rr
;
717 const struct ieee80211_freq_range
*fr
= NULL
;
719 rr
= ®d
->reg_rules
[i
];
720 fr
= &rr
->freq_range
;
723 * We only need to know if one frequency rule was
724 * was in center_freq's band, that's enough, so lets
725 * not overwrite it once found
727 if (!band_rule_found
)
728 band_rule_found
= freq_in_rule_band(fr
, center_freq
);
730 bw_fits
= reg_does_bw_fit(fr
,
734 if (band_rule_found
&& bw_fits
) {
740 if (!band_rule_found
)
746 int freq_reg_info(struct wiphy
*wiphy
,
749 const struct ieee80211_reg_rule
**reg_rule
)
751 assert_cfg80211_lock();
752 return freq_reg_info_regd(wiphy
,
758 EXPORT_SYMBOL(freq_reg_info
);
760 #ifdef CONFIG_CFG80211_REG_DEBUG
761 static const char *reg_initiator_name(enum nl80211_reg_initiator initiator
)
764 case NL80211_REGDOM_SET_BY_CORE
:
765 return "Set by core";
766 case NL80211_REGDOM_SET_BY_USER
:
767 return "Set by user";
768 case NL80211_REGDOM_SET_BY_DRIVER
:
769 return "Set by driver";
770 case NL80211_REGDOM_SET_BY_COUNTRY_IE
:
771 return "Set by country IE";
778 static void chan_reg_rule_print_dbg(struct ieee80211_channel
*chan
,
780 const struct ieee80211_reg_rule
*reg_rule
)
782 const struct ieee80211_power_rule
*power_rule
;
783 const struct ieee80211_freq_range
*freq_range
;
784 char max_antenna_gain
[32];
786 power_rule
= ®_rule
->power_rule
;
787 freq_range
= ®_rule
->freq_range
;
789 if (!power_rule
->max_antenna_gain
)
790 snprintf(max_antenna_gain
, 32, "N/A");
792 snprintf(max_antenna_gain
, 32, "%d", power_rule
->max_antenna_gain
);
794 REG_DBG_PRINT("Updating information on frequency %d MHz "
795 "for a %d MHz width channel with regulatory rule:\n",
797 KHZ_TO_MHZ(desired_bw_khz
));
799 REG_DBG_PRINT("%d KHz - %d KHz @ %d KHz), (%s mBi, %d mBm)\n",
800 freq_range
->start_freq_khz
,
801 freq_range
->end_freq_khz
,
802 freq_range
->max_bandwidth_khz
,
804 power_rule
->max_eirp
);
807 static void chan_reg_rule_print_dbg(struct ieee80211_channel
*chan
,
809 const struct ieee80211_reg_rule
*reg_rule
)
816 * Note that right now we assume the desired channel bandwidth
817 * is always 20 MHz for each individual channel (HT40 uses 20 MHz
818 * per channel, the primary and the extension channel). To support
819 * smaller custom bandwidths such as 5 MHz or 10 MHz we'll need a
820 * new ieee80211_channel.target_bw and re run the regulatory check
821 * on the wiphy with the target_bw specified. Then we can simply use
822 * that below for the desired_bw_khz below.
824 static void handle_channel(struct wiphy
*wiphy
,
825 enum nl80211_reg_initiator initiator
,
826 enum ieee80211_band band
,
827 unsigned int chan_idx
)
830 u32 flags
, bw_flags
= 0;
831 u32 desired_bw_khz
= MHZ_TO_KHZ(20);
832 const struct ieee80211_reg_rule
*reg_rule
= NULL
;
833 const struct ieee80211_power_rule
*power_rule
= NULL
;
834 const struct ieee80211_freq_range
*freq_range
= NULL
;
835 struct ieee80211_supported_band
*sband
;
836 struct ieee80211_channel
*chan
;
837 struct wiphy
*request_wiphy
= NULL
;
839 assert_cfg80211_lock();
841 request_wiphy
= wiphy_idx_to_wiphy(last_request
->wiphy_idx
);
843 sband
= wiphy
->bands
[band
];
844 BUG_ON(chan_idx
>= sband
->n_channels
);
845 chan
= &sband
->channels
[chan_idx
];
847 flags
= chan
->orig_flags
;
849 r
= freq_reg_info(wiphy
,
850 MHZ_TO_KHZ(chan
->center_freq
),
856 * We will disable all channels that do not match our
857 * received regulatory rule unless the hint is coming
858 * from a Country IE and the Country IE had no information
859 * about a band. The IEEE 802.11 spec allows for an AP
860 * to send only a subset of the regulatory rules allowed,
861 * so an AP in the US that only supports 2.4 GHz may only send
862 * a country IE with information for the 2.4 GHz band
863 * while 5 GHz is still supported.
865 if (initiator
== NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
869 REG_DBG_PRINT("Disabling freq %d MHz\n", chan
->center_freq
);
870 chan
->flags
= IEEE80211_CHAN_DISABLED
;
874 chan_reg_rule_print_dbg(chan
, desired_bw_khz
, reg_rule
);
876 power_rule
= ®_rule
->power_rule
;
877 freq_range
= ®_rule
->freq_range
;
879 if (freq_range
->max_bandwidth_khz
< MHZ_TO_KHZ(40))
880 bw_flags
= IEEE80211_CHAN_NO_HT40
;
882 if (last_request
->initiator
== NL80211_REGDOM_SET_BY_DRIVER
&&
883 request_wiphy
&& request_wiphy
== wiphy
&&
884 request_wiphy
->flags
& WIPHY_FLAG_STRICT_REGULATORY
) {
886 * This guarantees the driver's requested regulatory domain
887 * will always be used as a base for further regulatory
890 chan
->flags
= chan
->orig_flags
=
891 map_regdom_flags(reg_rule
->flags
) | bw_flags
;
892 chan
->max_antenna_gain
= chan
->orig_mag
=
893 (int) MBI_TO_DBI(power_rule
->max_antenna_gain
);
894 chan
->max_power
= chan
->orig_mpwr
=
895 (int) MBM_TO_DBM(power_rule
->max_eirp
);
899 chan
->beacon_found
= false;
900 chan
->flags
= flags
| bw_flags
| map_regdom_flags(reg_rule
->flags
);
901 chan
->max_antenna_gain
= min(chan
->orig_mag
,
902 (int) MBI_TO_DBI(power_rule
->max_antenna_gain
));
903 chan
->max_reg_power
= (int) MBM_TO_DBM(power_rule
->max_eirp
);
904 chan
->max_power
= min(chan
->max_power
, chan
->max_reg_power
);
907 static void handle_band(struct wiphy
*wiphy
,
908 enum ieee80211_band band
,
909 enum nl80211_reg_initiator initiator
)
912 struct ieee80211_supported_band
*sband
;
914 BUG_ON(!wiphy
->bands
[band
]);
915 sband
= wiphy
->bands
[band
];
917 for (i
= 0; i
< sband
->n_channels
; i
++)
918 handle_channel(wiphy
, initiator
, band
, i
);
921 static bool reg_request_cell_base(struct regulatory_request
*request
)
923 if (request
->initiator
!= NL80211_REGDOM_SET_BY_USER
)
925 if (request
->user_reg_hint_type
!= NL80211_USER_REG_HINT_CELL_BASE
)
930 bool reg_last_request_cell_base(void)
932 assert_cfg80211_lock();
934 mutex_lock(®_mutex
);
935 return reg_request_cell_base(last_request
);
936 mutex_unlock(®_mutex
);
939 #ifdef CONFIG_CFG80211_CERTIFICATION_ONUS
941 /* Core specific check */
942 static int reg_ignore_cell_hint(struct regulatory_request
*pending_request
)
944 if (!reg_num_devs_support_basehint
)
947 if (reg_request_cell_base(last_request
)) {
948 if (!regdom_changes(pending_request
->alpha2
))
955 /* Device specific check */
956 static bool reg_dev_ignore_cell_hint(struct wiphy
*wiphy
)
958 if (!(wiphy
->features
& NL80211_FEATURE_CELL_BASE_REG_HINTS
))
963 static int reg_ignore_cell_hint(struct regulatory_request
*pending_request
)
967 static int reg_dev_ignore_cell_hint(struct wiphy
*wiphy
)
974 static bool ignore_reg_update(struct wiphy
*wiphy
,
975 enum nl80211_reg_initiator initiator
)
978 REG_DBG_PRINT("Ignoring regulatory request %s since "
979 "last_request is not set\n",
980 reg_initiator_name(initiator
));
984 if (initiator
== NL80211_REGDOM_SET_BY_CORE
&&
985 wiphy
->flags
& WIPHY_FLAG_CUSTOM_REGULATORY
) {
986 REG_DBG_PRINT("Ignoring regulatory request %s "
987 "since the driver uses its own custom "
988 "regulatory domain\n",
989 reg_initiator_name(initiator
));
994 * wiphy->regd will be set once the device has its own
995 * desired regulatory domain set
997 if (wiphy
->flags
& WIPHY_FLAG_STRICT_REGULATORY
&& !wiphy
->regd
&&
998 initiator
!= NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
999 !is_world_regdom(last_request
->alpha2
)) {
1000 REG_DBG_PRINT("Ignoring regulatory request %s "
1001 "since the driver requires its own regulatory "
1002 "domain to be set first\n",
1003 reg_initiator_name(initiator
));
1007 if (reg_request_cell_base(last_request
))
1008 return reg_dev_ignore_cell_hint(wiphy
);
1013 static void handle_reg_beacon(struct wiphy
*wiphy
,
1014 unsigned int chan_idx
,
1015 struct reg_beacon
*reg_beacon
)
1017 struct ieee80211_supported_band
*sband
;
1018 struct ieee80211_channel
*chan
;
1019 bool channel_changed
= false;
1020 struct ieee80211_channel chan_before
;
1022 assert_cfg80211_lock();
1024 sband
= wiphy
->bands
[reg_beacon
->chan
.band
];
1025 chan
= &sband
->channels
[chan_idx
];
1027 if (likely(chan
->center_freq
!= reg_beacon
->chan
.center_freq
))
1030 if (chan
->beacon_found
)
1033 chan
->beacon_found
= true;
1035 if (wiphy
->flags
& WIPHY_FLAG_DISABLE_BEACON_HINTS
)
1038 chan_before
.center_freq
= chan
->center_freq
;
1039 chan_before
.flags
= chan
->flags
;
1041 if (chan
->flags
& IEEE80211_CHAN_PASSIVE_SCAN
) {
1042 chan
->flags
&= ~IEEE80211_CHAN_PASSIVE_SCAN
;
1043 channel_changed
= true;
1046 if (chan
->flags
& IEEE80211_CHAN_NO_IBSS
) {
1047 chan
->flags
&= ~IEEE80211_CHAN_NO_IBSS
;
1048 channel_changed
= true;
1051 if (channel_changed
)
1052 nl80211_send_beacon_hint_event(wiphy
, &chan_before
, chan
);
1056 * Called when a scan on a wiphy finds a beacon on
1059 static void wiphy_update_new_beacon(struct wiphy
*wiphy
,
1060 struct reg_beacon
*reg_beacon
)
1063 struct ieee80211_supported_band
*sband
;
1065 assert_cfg80211_lock();
1067 if (!wiphy
->bands
[reg_beacon
->chan
.band
])
1070 sband
= wiphy
->bands
[reg_beacon
->chan
.band
];
1072 for (i
= 0; i
< sband
->n_channels
; i
++)
1073 handle_reg_beacon(wiphy
, i
, reg_beacon
);
1077 * Called upon reg changes or a new wiphy is added
1079 static void wiphy_update_beacon_reg(struct wiphy
*wiphy
)
1082 struct ieee80211_supported_band
*sband
;
1083 struct reg_beacon
*reg_beacon
;
1085 assert_cfg80211_lock();
1087 if (list_empty(®_beacon_list
))
1090 list_for_each_entry(reg_beacon
, ®_beacon_list
, list
) {
1091 if (!wiphy
->bands
[reg_beacon
->chan
.band
])
1093 sband
= wiphy
->bands
[reg_beacon
->chan
.band
];
1094 for (i
= 0; i
< sband
->n_channels
; i
++)
1095 handle_reg_beacon(wiphy
, i
, reg_beacon
);
1099 static bool reg_is_world_roaming(struct wiphy
*wiphy
)
1101 if (is_world_regdom(cfg80211_regdomain
->alpha2
) ||
1102 (wiphy
->regd
&& is_world_regdom(wiphy
->regd
->alpha2
)))
1105 last_request
->initiator
!= NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
1106 wiphy
->flags
& WIPHY_FLAG_CUSTOM_REGULATORY
)
1111 /* Reap the advantages of previously found beacons */
1112 static void reg_process_beacons(struct wiphy
*wiphy
)
1115 * Means we are just firing up cfg80211, so no beacons would
1116 * have been processed yet.
1120 if (!reg_is_world_roaming(wiphy
))
1122 wiphy_update_beacon_reg(wiphy
);
1125 static bool is_ht40_not_allowed(struct ieee80211_channel
*chan
)
1129 if (chan
->flags
& IEEE80211_CHAN_DISABLED
)
1131 /* This would happen when regulatory rules disallow HT40 completely */
1132 if (IEEE80211_CHAN_NO_HT40
== (chan
->flags
& (IEEE80211_CHAN_NO_HT40
)))
1137 static void reg_process_ht_flags_channel(struct wiphy
*wiphy
,
1138 enum ieee80211_band band
,
1139 unsigned int chan_idx
)
1141 struct ieee80211_supported_band
*sband
;
1142 struct ieee80211_channel
*channel
;
1143 struct ieee80211_channel
*channel_before
= NULL
, *channel_after
= NULL
;
1146 assert_cfg80211_lock();
1148 sband
= wiphy
->bands
[band
];
1149 BUG_ON(chan_idx
>= sband
->n_channels
);
1150 channel
= &sband
->channels
[chan_idx
];
1152 if (is_ht40_not_allowed(channel
)) {
1153 channel
->flags
|= IEEE80211_CHAN_NO_HT40
;
1158 * We need to ensure the extension channels exist to
1159 * be able to use HT40- or HT40+, this finds them (or not)
1161 for (i
= 0; i
< sband
->n_channels
; i
++) {
1162 struct ieee80211_channel
*c
= &sband
->channels
[i
];
1163 if (c
->center_freq
== (channel
->center_freq
- 20))
1165 if (c
->center_freq
== (channel
->center_freq
+ 20))
1170 * Please note that this assumes target bandwidth is 20 MHz,
1171 * if that ever changes we also need to change the below logic
1172 * to include that as well.
1174 if (is_ht40_not_allowed(channel_before
))
1175 channel
->flags
|= IEEE80211_CHAN_NO_HT40MINUS
;
1177 channel
->flags
&= ~IEEE80211_CHAN_NO_HT40MINUS
;
1179 if (is_ht40_not_allowed(channel_after
))
1180 channel
->flags
|= IEEE80211_CHAN_NO_HT40PLUS
;
1182 channel
->flags
&= ~IEEE80211_CHAN_NO_HT40PLUS
;
1185 static void reg_process_ht_flags_band(struct wiphy
*wiphy
,
1186 enum ieee80211_band band
)
1189 struct ieee80211_supported_band
*sband
;
1191 BUG_ON(!wiphy
->bands
[band
]);
1192 sband
= wiphy
->bands
[band
];
1194 for (i
= 0; i
< sband
->n_channels
; i
++)
1195 reg_process_ht_flags_channel(wiphy
, band
, i
);
1198 static void reg_process_ht_flags(struct wiphy
*wiphy
)
1200 enum ieee80211_band band
;
1205 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++) {
1206 if (wiphy
->bands
[band
])
1207 reg_process_ht_flags_band(wiphy
, band
);
1212 static void wiphy_update_regulatory(struct wiphy
*wiphy
,
1213 enum nl80211_reg_initiator initiator
)
1215 enum ieee80211_band band
;
1219 if (ignore_reg_update(wiphy
, initiator
))
1222 last_request
->dfs_region
= cfg80211_regdomain
->dfs_region
;
1224 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++) {
1225 if (wiphy
->bands
[band
])
1226 handle_band(wiphy
, band
, initiator
);
1229 reg_process_beacons(wiphy
);
1230 reg_process_ht_flags(wiphy
);
1231 if (wiphy
->reg_notifier
)
1232 wiphy
->reg_notifier(wiphy
, last_request
);
1235 void regulatory_update(struct wiphy
*wiphy
,
1236 enum nl80211_reg_initiator setby
)
1238 mutex_lock(®_mutex
);
1239 wiphy_update_regulatory(wiphy
, setby
);
1240 mutex_unlock(®_mutex
);
1243 static void update_all_wiphy_regulatory(enum nl80211_reg_initiator initiator
)
1245 struct cfg80211_registered_device
*rdev
;
1246 struct wiphy
*wiphy
;
1248 list_for_each_entry(rdev
, &cfg80211_rdev_list
, list
) {
1249 wiphy
= &rdev
->wiphy
;
1250 wiphy_update_regulatory(wiphy
, initiator
);
1252 * Regulatory updates set by CORE are ignored for custom
1253 * regulatory cards. Let us notify the changes to the driver,
1254 * as some drivers used this to restore its orig_* reg domain.
1256 if (initiator
== NL80211_REGDOM_SET_BY_CORE
&&
1257 wiphy
->flags
& WIPHY_FLAG_CUSTOM_REGULATORY
&&
1258 wiphy
->reg_notifier
)
1259 wiphy
->reg_notifier(wiphy
, last_request
);
1263 static void handle_channel_custom(struct wiphy
*wiphy
,
1264 enum ieee80211_band band
,
1265 unsigned int chan_idx
,
1266 const struct ieee80211_regdomain
*regd
)
1269 u32 desired_bw_khz
= MHZ_TO_KHZ(20);
1271 const struct ieee80211_reg_rule
*reg_rule
= NULL
;
1272 const struct ieee80211_power_rule
*power_rule
= NULL
;
1273 const struct ieee80211_freq_range
*freq_range
= NULL
;
1274 struct ieee80211_supported_band
*sband
;
1275 struct ieee80211_channel
*chan
;
1279 sband
= wiphy
->bands
[band
];
1280 BUG_ON(chan_idx
>= sband
->n_channels
);
1281 chan
= &sband
->channels
[chan_idx
];
1283 r
= freq_reg_info_regd(wiphy
,
1284 MHZ_TO_KHZ(chan
->center_freq
),
1290 REG_DBG_PRINT("Disabling freq %d MHz as custom "
1291 "regd has no rule that fits a %d MHz "
1294 KHZ_TO_MHZ(desired_bw_khz
));
1295 chan
->flags
= IEEE80211_CHAN_DISABLED
;
1299 chan_reg_rule_print_dbg(chan
, desired_bw_khz
, reg_rule
);
1301 power_rule
= ®_rule
->power_rule
;
1302 freq_range
= ®_rule
->freq_range
;
1304 if (freq_range
->max_bandwidth_khz
< MHZ_TO_KHZ(40))
1305 bw_flags
= IEEE80211_CHAN_NO_HT40
;
1307 chan
->flags
|= map_regdom_flags(reg_rule
->flags
) | bw_flags
;
1308 chan
->max_antenna_gain
= (int) MBI_TO_DBI(power_rule
->max_antenna_gain
);
1309 chan
->max_power
= (int) MBM_TO_DBM(power_rule
->max_eirp
);
1312 static void handle_band_custom(struct wiphy
*wiphy
, enum ieee80211_band band
,
1313 const struct ieee80211_regdomain
*regd
)
1316 struct ieee80211_supported_band
*sband
;
1318 BUG_ON(!wiphy
->bands
[band
]);
1319 sband
= wiphy
->bands
[band
];
1321 for (i
= 0; i
< sband
->n_channels
; i
++)
1322 handle_channel_custom(wiphy
, band
, i
, regd
);
1325 /* Used by drivers prior to wiphy registration */
1326 void wiphy_apply_custom_regulatory(struct wiphy
*wiphy
,
1327 const struct ieee80211_regdomain
*regd
)
1329 enum ieee80211_band band
;
1330 unsigned int bands_set
= 0;
1332 mutex_lock(®_mutex
);
1333 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++) {
1334 if (!wiphy
->bands
[band
])
1336 handle_band_custom(wiphy
, band
, regd
);
1339 mutex_unlock(®_mutex
);
1342 * no point in calling this if it won't have any effect
1343 * on your device's supportd bands.
1345 WARN_ON(!bands_set
);
1347 EXPORT_SYMBOL(wiphy_apply_custom_regulatory
);
1350 * Return value which can be used by ignore_request() to indicate
1351 * it has been determined we should intersect two regulatory domains
1353 #define REG_INTERSECT 1
1355 /* This has the logic which determines when a new request
1356 * should be ignored. */
1357 static int ignore_request(struct wiphy
*wiphy
,
1358 struct regulatory_request
*pending_request
)
1360 struct wiphy
*last_wiphy
= NULL
;
1362 assert_cfg80211_lock();
1364 /* All initial requests are respected */
1368 switch (pending_request
->initiator
) {
1369 case NL80211_REGDOM_SET_BY_CORE
:
1371 case NL80211_REGDOM_SET_BY_COUNTRY_IE
:
1373 if (reg_request_cell_base(last_request
)) {
1374 /* Trust a Cell base station over the AP's country IE */
1375 if (regdom_changes(pending_request
->alpha2
))
1380 last_wiphy
= wiphy_idx_to_wiphy(last_request
->wiphy_idx
);
1382 if (unlikely(!is_an_alpha2(pending_request
->alpha2
)))
1384 if (last_request
->initiator
==
1385 NL80211_REGDOM_SET_BY_COUNTRY_IE
) {
1386 if (last_wiphy
!= wiphy
) {
1388 * Two cards with two APs claiming different
1389 * Country IE alpha2s. We could
1390 * intersect them, but that seems unlikely
1391 * to be correct. Reject second one for now.
1393 if (regdom_changes(pending_request
->alpha2
))
1398 * Two consecutive Country IE hints on the same wiphy.
1399 * This should be picked up early by the driver/stack
1401 if (WARN_ON(regdom_changes(pending_request
->alpha2
)))
1406 case NL80211_REGDOM_SET_BY_DRIVER
:
1407 if (last_request
->initiator
== NL80211_REGDOM_SET_BY_CORE
) {
1408 if (regdom_changes(pending_request
->alpha2
))
1414 * This would happen if you unplug and plug your card
1415 * back in or if you add a new device for which the previously
1416 * loaded card also agrees on the regulatory domain.
1418 if (last_request
->initiator
== NL80211_REGDOM_SET_BY_DRIVER
&&
1419 !regdom_changes(pending_request
->alpha2
))
1422 return REG_INTERSECT
;
1423 case NL80211_REGDOM_SET_BY_USER
:
1424 if (reg_request_cell_base(pending_request
))
1425 return reg_ignore_cell_hint(pending_request
);
1427 if (reg_request_cell_base(last_request
))
1430 if (last_request
->initiator
== NL80211_REGDOM_SET_BY_COUNTRY_IE
)
1431 return REG_INTERSECT
;
1433 * If the user knows better the user should set the regdom
1434 * to their country before the IE is picked up
1436 if (last_request
->initiator
== NL80211_REGDOM_SET_BY_USER
&&
1437 last_request
->intersect
)
1440 * Process user requests only after previous user/driver/core
1441 * requests have been processed
1443 if (last_request
->initiator
== NL80211_REGDOM_SET_BY_CORE
||
1444 last_request
->initiator
== NL80211_REGDOM_SET_BY_DRIVER
||
1445 last_request
->initiator
== NL80211_REGDOM_SET_BY_USER
) {
1446 if (regdom_changes(last_request
->alpha2
))
1450 if (!regdom_changes(pending_request
->alpha2
))
1459 static void reg_set_request_processed(void)
1461 bool need_more_processing
= false;
1463 last_request
->processed
= true;
1465 spin_lock(®_requests_lock
);
1466 if (!list_empty(®_requests_list
))
1467 need_more_processing
= true;
1468 spin_unlock(®_requests_lock
);
1470 if (last_request
->initiator
== NL80211_REGDOM_SET_BY_USER
)
1471 cancel_delayed_work(®_timeout
);
1473 if (need_more_processing
)
1474 schedule_work(®_work
);
1478 * __regulatory_hint - hint to the wireless core a regulatory domain
1479 * @wiphy: if the hint comes from country information from an AP, this
1480 * is required to be set to the wiphy that received the information
1481 * @pending_request: the regulatory request currently being processed
1483 * The Wireless subsystem can use this function to hint to the wireless core
1484 * what it believes should be the current regulatory domain.
1486 * Returns zero if all went fine, %-EALREADY if a regulatory domain had
1487 * already been set or other standard error codes.
1489 * Caller must hold &cfg80211_mutex and ®_mutex
1491 static int __regulatory_hint(struct wiphy
*wiphy
,
1492 struct regulatory_request
*pending_request
)
1494 bool intersect
= false;
1497 assert_cfg80211_lock();
1499 r
= ignore_request(wiphy
, pending_request
);
1501 if (r
== REG_INTERSECT
) {
1502 if (pending_request
->initiator
==
1503 NL80211_REGDOM_SET_BY_DRIVER
) {
1504 r
= reg_copy_regd(&wiphy
->regd
, cfg80211_regdomain
);
1506 kfree(pending_request
);
1513 * If the regulatory domain being requested by the
1514 * driver has already been set just copy it to the
1517 if (r
== -EALREADY
&&
1518 pending_request
->initiator
==
1519 NL80211_REGDOM_SET_BY_DRIVER
) {
1520 r
= reg_copy_regd(&wiphy
->regd
, cfg80211_regdomain
);
1522 kfree(pending_request
);
1528 kfree(pending_request
);
1533 if (last_request
!= &core_request_world
)
1534 kfree(last_request
);
1536 last_request
= pending_request
;
1537 last_request
->intersect
= intersect
;
1539 pending_request
= NULL
;
1541 if (last_request
->initiator
== NL80211_REGDOM_SET_BY_USER
) {
1542 user_alpha2
[0] = last_request
->alpha2
[0];
1543 user_alpha2
[1] = last_request
->alpha2
[1];
1546 /* When r == REG_INTERSECT we do need to call CRDA */
1549 * Since CRDA will not be called in this case as we already
1550 * have applied the requested regulatory domain before we just
1551 * inform userspace we have processed the request
1553 if (r
== -EALREADY
) {
1554 nl80211_send_reg_change_event(last_request
);
1555 reg_set_request_processed();
1560 return call_crda(last_request
->alpha2
);
1563 /* This processes *all* regulatory hints */
1564 static void reg_process_hint(struct regulatory_request
*reg_request
,
1565 enum nl80211_reg_initiator reg_initiator
)
1568 struct wiphy
*wiphy
= NULL
;
1570 BUG_ON(!reg_request
->alpha2
);
1572 if (wiphy_idx_valid(reg_request
->wiphy_idx
))
1573 wiphy
= wiphy_idx_to_wiphy(reg_request
->wiphy_idx
);
1575 if (reg_initiator
== NL80211_REGDOM_SET_BY_DRIVER
&&
1581 r
= __regulatory_hint(wiphy
, reg_request
);
1582 /* This is required so that the orig_* parameters are saved */
1583 if (r
== -EALREADY
&& wiphy
&&
1584 wiphy
->flags
& WIPHY_FLAG_STRICT_REGULATORY
) {
1585 wiphy_update_regulatory(wiphy
, reg_initiator
);
1590 * We only time out user hints, given that they should be the only
1591 * source of bogus requests.
1593 if (r
!= -EALREADY
&&
1594 reg_initiator
== NL80211_REGDOM_SET_BY_USER
)
1595 schedule_delayed_work(®_timeout
, msecs_to_jiffies(3142));
1599 * Processes regulatory hints, this is all the NL80211_REGDOM_SET_BY_*
1600 * Regulatory hints come on a first come first serve basis and we
1601 * must process each one atomically.
1603 static void reg_process_pending_hints(void)
1605 struct regulatory_request
*reg_request
;
1607 mutex_lock(&cfg80211_mutex
);
1608 mutex_lock(®_mutex
);
1610 /* When last_request->processed becomes true this will be rescheduled */
1611 if (last_request
&& !last_request
->processed
) {
1612 REG_DBG_PRINT("Pending regulatory request, waiting "
1613 "for it to be processed...\n");
1617 spin_lock(®_requests_lock
);
1619 if (list_empty(®_requests_list
)) {
1620 spin_unlock(®_requests_lock
);
1624 reg_request
= list_first_entry(®_requests_list
,
1625 struct regulatory_request
,
1627 list_del_init(®_request
->list
);
1629 spin_unlock(®_requests_lock
);
1631 reg_process_hint(reg_request
, reg_request
->initiator
);
1634 mutex_unlock(®_mutex
);
1635 mutex_unlock(&cfg80211_mutex
);
1638 /* Processes beacon hints -- this has nothing to do with country IEs */
1639 static void reg_process_pending_beacon_hints(void)
1641 struct cfg80211_registered_device
*rdev
;
1642 struct reg_beacon
*pending_beacon
, *tmp
;
1645 * No need to hold the reg_mutex here as we just touch wiphys
1646 * and do not read or access regulatory variables.
1648 mutex_lock(&cfg80211_mutex
);
1650 /* This goes through the _pending_ beacon list */
1651 spin_lock_bh(®_pending_beacons_lock
);
1653 if (list_empty(®_pending_beacons
)) {
1654 spin_unlock_bh(®_pending_beacons_lock
);
1658 list_for_each_entry_safe(pending_beacon
, tmp
,
1659 ®_pending_beacons
, list
) {
1661 list_del_init(&pending_beacon
->list
);
1663 /* Applies the beacon hint to current wiphys */
1664 list_for_each_entry(rdev
, &cfg80211_rdev_list
, list
)
1665 wiphy_update_new_beacon(&rdev
->wiphy
, pending_beacon
);
1667 /* Remembers the beacon hint for new wiphys or reg changes */
1668 list_add_tail(&pending_beacon
->list
, ®_beacon_list
);
1671 spin_unlock_bh(®_pending_beacons_lock
);
1673 mutex_unlock(&cfg80211_mutex
);
1676 static void reg_todo(struct work_struct
*work
)
1678 reg_process_pending_hints();
1679 reg_process_pending_beacon_hints();
1682 static void queue_regulatory_request(struct regulatory_request
*request
)
1684 if (isalpha(request
->alpha2
[0]))
1685 request
->alpha2
[0] = toupper(request
->alpha2
[0]);
1686 if (isalpha(request
->alpha2
[1]))
1687 request
->alpha2
[1] = toupper(request
->alpha2
[1]);
1689 spin_lock(®_requests_lock
);
1690 list_add_tail(&request
->list
, ®_requests_list
);
1691 spin_unlock(®_requests_lock
);
1693 schedule_work(®_work
);
1697 * Core regulatory hint -- happens during cfg80211_init()
1698 * and when we restore regulatory settings.
1700 static int regulatory_hint_core(const char *alpha2
)
1702 struct regulatory_request
*request
;
1704 request
= kzalloc(sizeof(struct regulatory_request
),
1709 request
->alpha2
[0] = alpha2
[0];
1710 request
->alpha2
[1] = alpha2
[1];
1711 request
->initiator
= NL80211_REGDOM_SET_BY_CORE
;
1713 queue_regulatory_request(request
);
1719 int regulatory_hint_user(const char *alpha2
,
1720 enum nl80211_user_reg_hint_type user_reg_hint_type
)
1722 struct regulatory_request
*request
;
1726 request
= kzalloc(sizeof(struct regulatory_request
), GFP_KERNEL
);
1730 request
->wiphy_idx
= WIPHY_IDX_STALE
;
1731 request
->alpha2
[0] = alpha2
[0];
1732 request
->alpha2
[1] = alpha2
[1];
1733 request
->initiator
= NL80211_REGDOM_SET_BY_USER
;
1734 request
->user_reg_hint_type
= user_reg_hint_type
;
1736 queue_regulatory_request(request
);
1742 int regulatory_hint(struct wiphy
*wiphy
, const char *alpha2
)
1744 struct regulatory_request
*request
;
1749 request
= kzalloc(sizeof(struct regulatory_request
), GFP_KERNEL
);
1753 request
->wiphy_idx
= get_wiphy_idx(wiphy
);
1755 /* Must have registered wiphy first */
1756 BUG_ON(!wiphy_idx_valid(request
->wiphy_idx
));
1758 request
->alpha2
[0] = alpha2
[0];
1759 request
->alpha2
[1] = alpha2
[1];
1760 request
->initiator
= NL80211_REGDOM_SET_BY_DRIVER
;
1762 queue_regulatory_request(request
);
1766 EXPORT_SYMBOL(regulatory_hint
);
1769 * We hold wdev_lock() here so we cannot hold cfg80211_mutex() and
1770 * therefore cannot iterate over the rdev list here.
1772 void regulatory_hint_11d(struct wiphy
*wiphy
,
1773 enum ieee80211_band band
,
1778 enum environment_cap env
= ENVIRON_ANY
;
1779 struct regulatory_request
*request
;
1781 mutex_lock(®_mutex
);
1783 if (unlikely(!last_request
))
1786 /* IE len must be evenly divisible by 2 */
1787 if (country_ie_len
& 0x01)
1790 if (country_ie_len
< IEEE80211_COUNTRY_IE_MIN_LEN
)
1793 alpha2
[0] = country_ie
[0];
1794 alpha2
[1] = country_ie
[1];
1796 if (country_ie
[2] == 'I')
1797 env
= ENVIRON_INDOOR
;
1798 else if (country_ie
[2] == 'O')
1799 env
= ENVIRON_OUTDOOR
;
1802 * We will run this only upon a successful connection on cfg80211.
1803 * We leave conflict resolution to the workqueue, where can hold
1806 if (likely(last_request
->initiator
==
1807 NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
1808 wiphy_idx_valid(last_request
->wiphy_idx
)))
1811 request
= kzalloc(sizeof(struct regulatory_request
), GFP_KERNEL
);
1815 request
->wiphy_idx
= get_wiphy_idx(wiphy
);
1816 request
->alpha2
[0] = alpha2
[0];
1817 request
->alpha2
[1] = alpha2
[1];
1818 request
->initiator
= NL80211_REGDOM_SET_BY_COUNTRY_IE
;
1819 request
->country_ie_env
= env
;
1821 mutex_unlock(®_mutex
);
1823 queue_regulatory_request(request
);
1828 mutex_unlock(®_mutex
);
1831 static void restore_alpha2(char *alpha2
, bool reset_user
)
1833 /* indicates there is no alpha2 to consider for restoration */
1837 /* The user setting has precedence over the module parameter */
1838 if (is_user_regdom_saved()) {
1839 /* Unless we're asked to ignore it and reset it */
1841 REG_DBG_PRINT("Restoring regulatory settings "
1842 "including user preference\n");
1843 user_alpha2
[0] = '9';
1844 user_alpha2
[1] = '7';
1847 * If we're ignoring user settings, we still need to
1848 * check the module parameter to ensure we put things
1849 * back as they were for a full restore.
1851 if (!is_world_regdom(ieee80211_regdom
)) {
1852 REG_DBG_PRINT("Keeping preference on "
1853 "module parameter ieee80211_regdom: %c%c\n",
1854 ieee80211_regdom
[0],
1855 ieee80211_regdom
[1]);
1856 alpha2
[0] = ieee80211_regdom
[0];
1857 alpha2
[1] = ieee80211_regdom
[1];
1860 REG_DBG_PRINT("Restoring regulatory settings "
1861 "while preserving user preference for: %c%c\n",
1864 alpha2
[0] = user_alpha2
[0];
1865 alpha2
[1] = user_alpha2
[1];
1867 } else 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];
1875 REG_DBG_PRINT("Restoring regulatory settings\n");
1878 static void restore_custom_reg_settings(struct wiphy
*wiphy
)
1880 struct ieee80211_supported_band
*sband
;
1881 enum ieee80211_band band
;
1882 struct ieee80211_channel
*chan
;
1885 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++) {
1886 sband
= wiphy
->bands
[band
];
1889 for (i
= 0; i
< sband
->n_channels
; i
++) {
1890 chan
= &sband
->channels
[i
];
1891 chan
->flags
= chan
->orig_flags
;
1892 chan
->max_antenna_gain
= chan
->orig_mag
;
1893 chan
->max_power
= chan
->orig_mpwr
;
1899 * Restoring regulatory settings involves ingoring any
1900 * possibly stale country IE information and user regulatory
1901 * settings if so desired, this includes any beacon hints
1902 * learned as we could have traveled outside to another country
1903 * after disconnection. To restore regulatory settings we do
1904 * exactly what we did at bootup:
1906 * - send a core regulatory hint
1907 * - send a user regulatory hint if applicable
1909 * Device drivers that send a regulatory hint for a specific country
1910 * keep their own regulatory domain on wiphy->regd so that does does
1911 * not need to be remembered.
1913 static void restore_regulatory_settings(bool reset_user
)
1916 char world_alpha2
[2];
1917 struct reg_beacon
*reg_beacon
, *btmp
;
1918 struct regulatory_request
*reg_request
, *tmp
;
1919 LIST_HEAD(tmp_reg_req_list
);
1920 struct cfg80211_registered_device
*rdev
;
1922 mutex_lock(&cfg80211_mutex
);
1923 mutex_lock(®_mutex
);
1925 reset_regdomains(true);
1926 restore_alpha2(alpha2
, reset_user
);
1929 * If there's any pending requests we simply
1930 * stash them to a temporary pending queue and
1931 * add then after we've restored regulatory
1934 spin_lock(®_requests_lock
);
1935 if (!list_empty(®_requests_list
)) {
1936 list_for_each_entry_safe(reg_request
, tmp
,
1937 ®_requests_list
, list
) {
1938 if (reg_request
->initiator
!=
1939 NL80211_REGDOM_SET_BY_USER
)
1941 list_del(®_request
->list
);
1942 list_add_tail(®_request
->list
, &tmp_reg_req_list
);
1945 spin_unlock(®_requests_lock
);
1947 /* Clear beacon hints */
1948 spin_lock_bh(®_pending_beacons_lock
);
1949 if (!list_empty(®_pending_beacons
)) {
1950 list_for_each_entry_safe(reg_beacon
, btmp
,
1951 ®_pending_beacons
, list
) {
1952 list_del(®_beacon
->list
);
1956 spin_unlock_bh(®_pending_beacons_lock
);
1958 if (!list_empty(®_beacon_list
)) {
1959 list_for_each_entry_safe(reg_beacon
, btmp
,
1960 ®_beacon_list
, list
) {
1961 list_del(®_beacon
->list
);
1966 /* First restore to the basic regulatory settings */
1967 cfg80211_regdomain
= cfg80211_world_regdom
;
1968 world_alpha2
[0] = cfg80211_regdomain
->alpha2
[0];
1969 world_alpha2
[1] = cfg80211_regdomain
->alpha2
[1];
1971 list_for_each_entry(rdev
, &cfg80211_rdev_list
, list
) {
1972 if (rdev
->wiphy
.flags
& WIPHY_FLAG_CUSTOM_REGULATORY
)
1973 restore_custom_reg_settings(&rdev
->wiphy
);
1976 mutex_unlock(®_mutex
);
1977 mutex_unlock(&cfg80211_mutex
);
1979 regulatory_hint_core(world_alpha2
);
1982 * This restores the ieee80211_regdom module parameter
1983 * preference or the last user requested regulatory
1984 * settings, user regulatory settings takes precedence.
1986 if (is_an_alpha2(alpha2
))
1987 regulatory_hint_user(user_alpha2
, NL80211_USER_REG_HINT_USER
);
1989 if (list_empty(&tmp_reg_req_list
))
1992 mutex_lock(&cfg80211_mutex
);
1993 mutex_lock(®_mutex
);
1995 spin_lock(®_requests_lock
);
1996 list_for_each_entry_safe(reg_request
, tmp
, &tmp_reg_req_list
, list
) {
1997 REG_DBG_PRINT("Adding request for country %c%c back "
1999 reg_request
->alpha2
[0],
2000 reg_request
->alpha2
[1]);
2001 list_del(®_request
->list
);
2002 list_add_tail(®_request
->list
, ®_requests_list
);
2004 spin_unlock(®_requests_lock
);
2006 mutex_unlock(®_mutex
);
2007 mutex_unlock(&cfg80211_mutex
);
2009 REG_DBG_PRINT("Kicking the queue\n");
2011 schedule_work(®_work
);
2014 void regulatory_hint_disconnect(void)
2016 REG_DBG_PRINT("All devices are disconnected, going to "
2017 "restore regulatory settings\n");
2018 restore_regulatory_settings(false);
2021 static bool freq_is_chan_12_13_14(u16 freq
)
2023 if (freq
== ieee80211_channel_to_frequency(12, IEEE80211_BAND_2GHZ
) ||
2024 freq
== ieee80211_channel_to_frequency(13, IEEE80211_BAND_2GHZ
) ||
2025 freq
== ieee80211_channel_to_frequency(14, IEEE80211_BAND_2GHZ
))
2030 int regulatory_hint_found_beacon(struct wiphy
*wiphy
,
2031 struct ieee80211_channel
*beacon_chan
,
2034 struct reg_beacon
*reg_beacon
;
2036 if (likely((beacon_chan
->beacon_found
||
2037 (beacon_chan
->flags
& IEEE80211_CHAN_RADAR
) ||
2038 (beacon_chan
->band
== IEEE80211_BAND_2GHZ
&&
2039 !freq_is_chan_12_13_14(beacon_chan
->center_freq
)))))
2042 reg_beacon
= kzalloc(sizeof(struct reg_beacon
), gfp
);
2046 REG_DBG_PRINT("Found new beacon on "
2047 "frequency: %d MHz (Ch %d) on %s\n",
2048 beacon_chan
->center_freq
,
2049 ieee80211_frequency_to_channel(beacon_chan
->center_freq
),
2052 memcpy(®_beacon
->chan
, beacon_chan
,
2053 sizeof(struct ieee80211_channel
));
2057 * Since we can be called from BH or and non-BH context
2058 * we must use spin_lock_bh()
2060 spin_lock_bh(®_pending_beacons_lock
);
2061 list_add_tail(®_beacon
->list
, ®_pending_beacons
);
2062 spin_unlock_bh(®_pending_beacons_lock
);
2064 schedule_work(®_work
);
2069 static void print_rd_rules(const struct ieee80211_regdomain
*rd
)
2072 const struct ieee80211_reg_rule
*reg_rule
= NULL
;
2073 const struct ieee80211_freq_range
*freq_range
= NULL
;
2074 const struct ieee80211_power_rule
*power_rule
= NULL
;
2076 pr_info(" (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)\n");
2078 for (i
= 0; i
< rd
->n_reg_rules
; i
++) {
2079 reg_rule
= &rd
->reg_rules
[i
];
2080 freq_range
= ®_rule
->freq_range
;
2081 power_rule
= ®_rule
->power_rule
;
2084 * There may not be documentation for max antenna gain
2085 * in certain regions
2087 if (power_rule
->max_antenna_gain
)
2088 pr_info(" (%d KHz - %d KHz @ %d KHz), (%d mBi, %d mBm)\n",
2089 freq_range
->start_freq_khz
,
2090 freq_range
->end_freq_khz
,
2091 freq_range
->max_bandwidth_khz
,
2092 power_rule
->max_antenna_gain
,
2093 power_rule
->max_eirp
);
2095 pr_info(" (%d KHz - %d KHz @ %d KHz), (N/A, %d mBm)\n",
2096 freq_range
->start_freq_khz
,
2097 freq_range
->end_freq_khz
,
2098 freq_range
->max_bandwidth_khz
,
2099 power_rule
->max_eirp
);
2103 bool reg_supported_dfs_region(u8 dfs_region
)
2105 switch (dfs_region
) {
2106 case NL80211_DFS_UNSET
:
2107 case NL80211_DFS_FCC
:
2108 case NL80211_DFS_ETSI
:
2109 case NL80211_DFS_JP
:
2112 REG_DBG_PRINT("Ignoring uknown DFS master region: %d\n",
2118 static void print_dfs_region(u8 dfs_region
)
2123 switch (dfs_region
) {
2124 case NL80211_DFS_FCC
:
2125 pr_info(" DFS Master region FCC");
2127 case NL80211_DFS_ETSI
:
2128 pr_info(" DFS Master region ETSI");
2130 case NL80211_DFS_JP
:
2131 pr_info(" DFS Master region JP");
2134 pr_info(" DFS Master region Uknown");
2139 static void print_regdomain(const struct ieee80211_regdomain
*rd
)
2142 if (is_intersected_alpha2(rd
->alpha2
)) {
2144 if (last_request
->initiator
==
2145 NL80211_REGDOM_SET_BY_COUNTRY_IE
) {
2146 struct cfg80211_registered_device
*rdev
;
2147 rdev
= cfg80211_rdev_by_wiphy_idx(
2148 last_request
->wiphy_idx
);
2150 pr_info("Current regulatory domain updated by AP to: %c%c\n",
2151 rdev
->country_ie_alpha2
[0],
2152 rdev
->country_ie_alpha2
[1]);
2154 pr_info("Current regulatory domain intersected:\n");
2156 pr_info("Current regulatory domain intersected:\n");
2157 } else if (is_world_regdom(rd
->alpha2
))
2158 pr_info("World regulatory domain updated:\n");
2160 if (is_unknown_alpha2(rd
->alpha2
))
2161 pr_info("Regulatory domain changed to driver built-in settings (unknown country)\n");
2163 if (reg_request_cell_base(last_request
))
2164 pr_info("Regulatory domain changed "
2165 "to country: %c%c by Cell Station\n",
2166 rd
->alpha2
[0], rd
->alpha2
[1]);
2168 pr_info("Regulatory domain changed "
2169 "to country: %c%c\n",
2170 rd
->alpha2
[0], rd
->alpha2
[1]);
2173 print_dfs_region(rd
->dfs_region
);
2177 static void print_regdomain_info(const struct ieee80211_regdomain
*rd
)
2179 pr_info("Regulatory domain: %c%c\n", rd
->alpha2
[0], rd
->alpha2
[1]);
2183 /* Takes ownership of rd only if it doesn't fail */
2184 static int __set_regdom(const struct ieee80211_regdomain
*rd
)
2186 const struct ieee80211_regdomain
*intersected_rd
= NULL
;
2187 struct cfg80211_registered_device
*rdev
= NULL
;
2188 struct wiphy
*request_wiphy
;
2189 /* Some basic sanity checks first */
2191 if (is_world_regdom(rd
->alpha2
)) {
2192 if (WARN_ON(!reg_is_valid_request(rd
->alpha2
)))
2194 update_world_regdomain(rd
);
2198 if (!is_alpha2_set(rd
->alpha2
) && !is_an_alpha2(rd
->alpha2
) &&
2199 !is_unknown_alpha2(rd
->alpha2
))
2206 * Lets only bother proceeding on the same alpha2 if the current
2207 * rd is non static (it means CRDA was present and was used last)
2208 * and the pending request came in from a country IE
2210 if (last_request
->initiator
!= NL80211_REGDOM_SET_BY_COUNTRY_IE
) {
2212 * If someone else asked us to change the rd lets only bother
2213 * checking if the alpha2 changes if CRDA was already called
2215 if (!regdom_changes(rd
->alpha2
))
2220 * Now lets set the regulatory domain, update all driver channels
2221 * and finally inform them of what we have done, in case they want
2222 * to review or adjust their own settings based on their own
2223 * internal EEPROM data
2226 if (WARN_ON(!reg_is_valid_request(rd
->alpha2
)))
2229 if (!is_valid_rd(rd
)) {
2230 pr_err("Invalid regulatory domain detected:\n");
2231 print_regdomain_info(rd
);
2235 request_wiphy
= wiphy_idx_to_wiphy(last_request
->wiphy_idx
);
2236 if (!request_wiphy
&&
2237 (last_request
->initiator
== NL80211_REGDOM_SET_BY_DRIVER
||
2238 last_request
->initiator
== NL80211_REGDOM_SET_BY_COUNTRY_IE
)) {
2239 schedule_delayed_work(®_timeout
, 0);
2243 if (!last_request
->intersect
) {
2246 if (last_request
->initiator
!= NL80211_REGDOM_SET_BY_DRIVER
) {
2247 reset_regdomains(false);
2248 cfg80211_regdomain
= rd
;
2253 * For a driver hint, lets copy the regulatory domain the
2254 * driver wanted to the wiphy to deal with conflicts
2258 * Userspace could have sent two replies with only
2259 * one kernel request.
2261 if (request_wiphy
->regd
)
2264 r
= reg_copy_regd(&request_wiphy
->regd
, rd
);
2268 reset_regdomains(false);
2269 cfg80211_regdomain
= rd
;
2273 /* Intersection requires a bit more work */
2275 if (last_request
->initiator
!= NL80211_REGDOM_SET_BY_COUNTRY_IE
) {
2277 intersected_rd
= regdom_intersect(rd
, cfg80211_regdomain
);
2278 if (!intersected_rd
)
2282 * We can trash what CRDA provided now.
2283 * However if a driver requested this specific regulatory
2284 * domain we keep it for its private use
2286 if (last_request
->initiator
== NL80211_REGDOM_SET_BY_DRIVER
)
2287 request_wiphy
->regd
= rd
;
2293 reset_regdomains(false);
2294 cfg80211_regdomain
= intersected_rd
;
2299 if (!intersected_rd
)
2302 rdev
= wiphy_to_dev(request_wiphy
);
2304 rdev
->country_ie_alpha2
[0] = rd
->alpha2
[0];
2305 rdev
->country_ie_alpha2
[1] = rd
->alpha2
[1];
2306 rdev
->env
= last_request
->country_ie_env
;
2308 BUG_ON(intersected_rd
== rd
);
2313 reset_regdomains(false);
2314 cfg80211_regdomain
= intersected_rd
;
2321 * Use this call to set the current regulatory domain. Conflicts with
2322 * multiple drivers can be ironed out later. Caller must've already
2323 * kmalloc'd the rd structure. Caller must hold cfg80211_mutex
2325 int set_regdom(const struct ieee80211_regdomain
*rd
)
2329 assert_cfg80211_lock();
2331 mutex_lock(®_mutex
);
2333 /* Note that this doesn't update the wiphys, this is done below */
2334 r
= __set_regdom(rd
);
2337 reg_set_request_processed();
2340 mutex_unlock(®_mutex
);
2344 /* This would make this whole thing pointless */
2345 if (!last_request
->intersect
)
2346 BUG_ON(rd
!= cfg80211_regdomain
);
2348 /* update all wiphys now with the new established regulatory domain */
2349 update_all_wiphy_regulatory(last_request
->initiator
);
2351 print_regdomain(cfg80211_regdomain
);
2353 nl80211_send_reg_change_event(last_request
);
2355 reg_set_request_processed();
2357 mutex_unlock(®_mutex
);
2362 #ifdef CONFIG_HOTPLUG
2363 int reg_device_uevent(struct device
*dev
, struct kobj_uevent_env
*env
)
2365 if (last_request
&& !last_request
->processed
) {
2366 if (add_uevent_var(env
, "COUNTRY=%c%c",
2367 last_request
->alpha2
[0],
2368 last_request
->alpha2
[1]))
2375 int reg_device_uevent(struct device
*dev
, struct kobj_uevent_env
*env
)
2379 #endif /* CONFIG_HOTPLUG */
2381 void wiphy_regulatory_register(struct wiphy
*wiphy
)
2383 assert_cfg80211_lock();
2385 mutex_lock(®_mutex
);
2387 if (!reg_dev_ignore_cell_hint(wiphy
))
2388 reg_num_devs_support_basehint
++;
2390 mutex_unlock(®_mutex
);
2393 /* Caller must hold cfg80211_mutex */
2394 void reg_device_remove(struct wiphy
*wiphy
)
2396 struct wiphy
*request_wiphy
= NULL
;
2398 assert_cfg80211_lock();
2400 mutex_lock(®_mutex
);
2402 if (!reg_dev_ignore_cell_hint(wiphy
))
2403 reg_num_devs_support_basehint
--;
2408 request_wiphy
= wiphy_idx_to_wiphy(last_request
->wiphy_idx
);
2410 if (!request_wiphy
|| request_wiphy
!= wiphy
)
2413 last_request
->wiphy_idx
= WIPHY_IDX_STALE
;
2414 last_request
->country_ie_env
= ENVIRON_ANY
;
2416 mutex_unlock(®_mutex
);
2419 static void reg_timeout_work(struct work_struct
*work
)
2421 REG_DBG_PRINT("Timeout while waiting for CRDA to reply, "
2422 "restoring regulatory settings\n");
2423 restore_regulatory_settings(true);
2426 int __init
regulatory_init(void)
2430 reg_pdev
= platform_device_register_simple("regulatory", 0, NULL
, 0);
2431 if (IS_ERR(reg_pdev
))
2432 return PTR_ERR(reg_pdev
);
2434 reg_pdev
->dev
.type
= ®_device_type
;
2436 spin_lock_init(®_requests_lock
);
2437 spin_lock_init(®_pending_beacons_lock
);
2439 reg_regdb_size_check();
2441 cfg80211_regdomain
= cfg80211_world_regdom
;
2443 user_alpha2
[0] = '9';
2444 user_alpha2
[1] = '7';
2446 /* We always try to get an update for the static regdomain */
2447 err
= regulatory_hint_core(cfg80211_regdomain
->alpha2
);
2452 * N.B. kobject_uevent_env() can fail mainly for when we're out
2453 * memory which is handled and propagated appropriately above
2454 * but it can also fail during a netlink_broadcast() or during
2455 * early boot for call_usermodehelper(). For now treat these
2456 * errors as non-fatal.
2458 pr_err("kobject_uevent_env() was unable to call CRDA during init\n");
2459 #ifdef CONFIG_CFG80211_REG_DEBUG
2460 /* We want to find out exactly why when debugging */
2466 * Finally, if the user set the module parameter treat it
2469 if (!is_world_regdom(ieee80211_regdom
))
2470 regulatory_hint_user(ieee80211_regdom
,
2471 NL80211_USER_REG_HINT_USER
);
2476 void /* __init_or_exit */ regulatory_exit(void)
2478 struct regulatory_request
*reg_request
, *tmp
;
2479 struct reg_beacon
*reg_beacon
, *btmp
;
2481 cancel_work_sync(®_work
);
2482 cancel_delayed_work_sync(®_timeout
);
2484 mutex_lock(&cfg80211_mutex
);
2485 mutex_lock(®_mutex
);
2487 reset_regdomains(true);
2489 dev_set_uevent_suppress(®_pdev
->dev
, true);
2491 platform_device_unregister(reg_pdev
);
2493 spin_lock_bh(®_pending_beacons_lock
);
2494 if (!list_empty(®_pending_beacons
)) {
2495 list_for_each_entry_safe(reg_beacon
, btmp
,
2496 ®_pending_beacons
, list
) {
2497 list_del(®_beacon
->list
);
2501 spin_unlock_bh(®_pending_beacons_lock
);
2503 if (!list_empty(®_beacon_list
)) {
2504 list_for_each_entry_safe(reg_beacon
, btmp
,
2505 ®_beacon_list
, list
) {
2506 list_del(®_beacon
->list
);
2511 spin_lock(®_requests_lock
);
2512 if (!list_empty(®_requests_list
)) {
2513 list_for_each_entry_safe(reg_request
, tmp
,
2514 ®_requests_list
, list
) {
2515 list_del(®_request
->list
);
2519 spin_unlock(®_requests_lock
);
2521 mutex_unlock(®_mutex
);
2522 mutex_unlock(&cfg80211_mutex
);