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)
933 assert_cfg80211_lock();
935 mutex_lock(®_mutex
);
936 val
= reg_request_cell_base(last_request
);
937 mutex_unlock(®_mutex
);
941 #ifdef CONFIG_CFG80211_CERTIFICATION_ONUS
943 /* Core specific check */
944 static int reg_ignore_cell_hint(struct regulatory_request
*pending_request
)
946 if (!reg_num_devs_support_basehint
)
949 if (reg_request_cell_base(last_request
)) {
950 if (!regdom_changes(pending_request
->alpha2
))
957 /* Device specific check */
958 static bool reg_dev_ignore_cell_hint(struct wiphy
*wiphy
)
960 if (!(wiphy
->features
& NL80211_FEATURE_CELL_BASE_REG_HINTS
))
965 static int reg_ignore_cell_hint(struct regulatory_request
*pending_request
)
969 static int reg_dev_ignore_cell_hint(struct wiphy
*wiphy
)
976 static bool ignore_reg_update(struct wiphy
*wiphy
,
977 enum nl80211_reg_initiator initiator
)
980 REG_DBG_PRINT("Ignoring regulatory request %s since "
981 "last_request is not set\n",
982 reg_initiator_name(initiator
));
986 if (initiator
== NL80211_REGDOM_SET_BY_CORE
&&
987 wiphy
->flags
& WIPHY_FLAG_CUSTOM_REGULATORY
) {
988 REG_DBG_PRINT("Ignoring regulatory request %s "
989 "since the driver uses its own custom "
990 "regulatory domain\n",
991 reg_initiator_name(initiator
));
996 * wiphy->regd will be set once the device has its own
997 * desired regulatory domain set
999 if (wiphy
->flags
& WIPHY_FLAG_STRICT_REGULATORY
&& !wiphy
->regd
&&
1000 initiator
!= NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
1001 !is_world_regdom(last_request
->alpha2
)) {
1002 REG_DBG_PRINT("Ignoring regulatory request %s "
1003 "since the driver requires its own regulatory "
1004 "domain to be set first\n",
1005 reg_initiator_name(initiator
));
1009 if (reg_request_cell_base(last_request
))
1010 return reg_dev_ignore_cell_hint(wiphy
);
1015 static void handle_reg_beacon(struct wiphy
*wiphy
,
1016 unsigned int chan_idx
,
1017 struct reg_beacon
*reg_beacon
)
1019 struct ieee80211_supported_band
*sband
;
1020 struct ieee80211_channel
*chan
;
1021 bool channel_changed
= false;
1022 struct ieee80211_channel chan_before
;
1024 assert_cfg80211_lock();
1026 sband
= wiphy
->bands
[reg_beacon
->chan
.band
];
1027 chan
= &sband
->channels
[chan_idx
];
1029 if (likely(chan
->center_freq
!= reg_beacon
->chan
.center_freq
))
1032 if (chan
->beacon_found
)
1035 chan
->beacon_found
= true;
1037 if (wiphy
->flags
& WIPHY_FLAG_DISABLE_BEACON_HINTS
)
1040 chan_before
.center_freq
= chan
->center_freq
;
1041 chan_before
.flags
= chan
->flags
;
1043 if (chan
->flags
& IEEE80211_CHAN_PASSIVE_SCAN
) {
1044 chan
->flags
&= ~IEEE80211_CHAN_PASSIVE_SCAN
;
1045 channel_changed
= true;
1048 if (chan
->flags
& IEEE80211_CHAN_NO_IBSS
) {
1049 chan
->flags
&= ~IEEE80211_CHAN_NO_IBSS
;
1050 channel_changed
= true;
1053 if (channel_changed
)
1054 nl80211_send_beacon_hint_event(wiphy
, &chan_before
, chan
);
1058 * Called when a scan on a wiphy finds a beacon on
1061 static void wiphy_update_new_beacon(struct wiphy
*wiphy
,
1062 struct reg_beacon
*reg_beacon
)
1065 struct ieee80211_supported_band
*sband
;
1067 assert_cfg80211_lock();
1069 if (!wiphy
->bands
[reg_beacon
->chan
.band
])
1072 sband
= wiphy
->bands
[reg_beacon
->chan
.band
];
1074 for (i
= 0; i
< sband
->n_channels
; i
++)
1075 handle_reg_beacon(wiphy
, i
, reg_beacon
);
1079 * Called upon reg changes or a new wiphy is added
1081 static void wiphy_update_beacon_reg(struct wiphy
*wiphy
)
1084 struct ieee80211_supported_band
*sband
;
1085 struct reg_beacon
*reg_beacon
;
1087 assert_cfg80211_lock();
1089 if (list_empty(®_beacon_list
))
1092 list_for_each_entry(reg_beacon
, ®_beacon_list
, list
) {
1093 if (!wiphy
->bands
[reg_beacon
->chan
.band
])
1095 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 static bool reg_is_world_roaming(struct wiphy
*wiphy
)
1103 if (is_world_regdom(cfg80211_regdomain
->alpha2
) ||
1104 (wiphy
->regd
&& is_world_regdom(wiphy
->regd
->alpha2
)))
1107 last_request
->initiator
!= NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
1108 wiphy
->flags
& WIPHY_FLAG_CUSTOM_REGULATORY
)
1113 /* Reap the advantages of previously found beacons */
1114 static void reg_process_beacons(struct wiphy
*wiphy
)
1117 * Means we are just firing up cfg80211, so no beacons would
1118 * have been processed yet.
1122 if (!reg_is_world_roaming(wiphy
))
1124 wiphy_update_beacon_reg(wiphy
);
1127 static bool is_ht40_not_allowed(struct ieee80211_channel
*chan
)
1131 if (chan
->flags
& IEEE80211_CHAN_DISABLED
)
1133 /* This would happen when regulatory rules disallow HT40 completely */
1134 if (IEEE80211_CHAN_NO_HT40
== (chan
->flags
& (IEEE80211_CHAN_NO_HT40
)))
1139 static void reg_process_ht_flags_channel(struct wiphy
*wiphy
,
1140 enum ieee80211_band band
,
1141 unsigned int chan_idx
)
1143 struct ieee80211_supported_band
*sband
;
1144 struct ieee80211_channel
*channel
;
1145 struct ieee80211_channel
*channel_before
= NULL
, *channel_after
= NULL
;
1148 assert_cfg80211_lock();
1150 sband
= wiphy
->bands
[band
];
1151 BUG_ON(chan_idx
>= sband
->n_channels
);
1152 channel
= &sband
->channels
[chan_idx
];
1154 if (is_ht40_not_allowed(channel
)) {
1155 channel
->flags
|= IEEE80211_CHAN_NO_HT40
;
1160 * We need to ensure the extension channels exist to
1161 * be able to use HT40- or HT40+, this finds them (or not)
1163 for (i
= 0; i
< sband
->n_channels
; i
++) {
1164 struct ieee80211_channel
*c
= &sband
->channels
[i
];
1165 if (c
->center_freq
== (channel
->center_freq
- 20))
1167 if (c
->center_freq
== (channel
->center_freq
+ 20))
1172 * Please note that this assumes target bandwidth is 20 MHz,
1173 * if that ever changes we also need to change the below logic
1174 * to include that as well.
1176 if (is_ht40_not_allowed(channel_before
))
1177 channel
->flags
|= IEEE80211_CHAN_NO_HT40MINUS
;
1179 channel
->flags
&= ~IEEE80211_CHAN_NO_HT40MINUS
;
1181 if (is_ht40_not_allowed(channel_after
))
1182 channel
->flags
|= IEEE80211_CHAN_NO_HT40PLUS
;
1184 channel
->flags
&= ~IEEE80211_CHAN_NO_HT40PLUS
;
1187 static void reg_process_ht_flags_band(struct wiphy
*wiphy
,
1188 enum ieee80211_band band
)
1191 struct ieee80211_supported_band
*sband
;
1193 BUG_ON(!wiphy
->bands
[band
]);
1194 sband
= wiphy
->bands
[band
];
1196 for (i
= 0; i
< sband
->n_channels
; i
++)
1197 reg_process_ht_flags_channel(wiphy
, band
, i
);
1200 static void reg_process_ht_flags(struct wiphy
*wiphy
)
1202 enum ieee80211_band band
;
1207 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++) {
1208 if (wiphy
->bands
[band
])
1209 reg_process_ht_flags_band(wiphy
, band
);
1214 static void wiphy_update_regulatory(struct wiphy
*wiphy
,
1215 enum nl80211_reg_initiator initiator
)
1217 enum ieee80211_band band
;
1221 if (ignore_reg_update(wiphy
, initiator
))
1224 last_request
->dfs_region
= cfg80211_regdomain
->dfs_region
;
1226 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++) {
1227 if (wiphy
->bands
[band
])
1228 handle_band(wiphy
, band
, initiator
);
1231 reg_process_beacons(wiphy
);
1232 reg_process_ht_flags(wiphy
);
1233 if (wiphy
->reg_notifier
)
1234 wiphy
->reg_notifier(wiphy
, last_request
);
1237 static void update_all_wiphy_regulatory(enum nl80211_reg_initiator initiator
)
1239 struct cfg80211_registered_device
*rdev
;
1240 struct wiphy
*wiphy
;
1242 list_for_each_entry(rdev
, &cfg80211_rdev_list
, list
) {
1243 wiphy
= &rdev
->wiphy
;
1244 wiphy_update_regulatory(wiphy
, initiator
);
1246 * Regulatory updates set by CORE are ignored for custom
1247 * regulatory cards. Let us notify the changes to the driver,
1248 * as some drivers used this to restore its orig_* reg domain.
1250 if (initiator
== NL80211_REGDOM_SET_BY_CORE
&&
1251 wiphy
->flags
& WIPHY_FLAG_CUSTOM_REGULATORY
&&
1252 wiphy
->reg_notifier
)
1253 wiphy
->reg_notifier(wiphy
, last_request
);
1257 static void handle_channel_custom(struct wiphy
*wiphy
,
1258 enum ieee80211_band band
,
1259 unsigned int chan_idx
,
1260 const struct ieee80211_regdomain
*regd
)
1263 u32 desired_bw_khz
= MHZ_TO_KHZ(20);
1265 const struct ieee80211_reg_rule
*reg_rule
= NULL
;
1266 const struct ieee80211_power_rule
*power_rule
= NULL
;
1267 const struct ieee80211_freq_range
*freq_range
= NULL
;
1268 struct ieee80211_supported_band
*sband
;
1269 struct ieee80211_channel
*chan
;
1273 sband
= wiphy
->bands
[band
];
1274 BUG_ON(chan_idx
>= sband
->n_channels
);
1275 chan
= &sband
->channels
[chan_idx
];
1277 r
= freq_reg_info_regd(wiphy
,
1278 MHZ_TO_KHZ(chan
->center_freq
),
1284 REG_DBG_PRINT("Disabling freq %d MHz as custom "
1285 "regd has no rule that fits a %d MHz "
1288 KHZ_TO_MHZ(desired_bw_khz
));
1289 chan
->flags
= IEEE80211_CHAN_DISABLED
;
1293 chan_reg_rule_print_dbg(chan
, desired_bw_khz
, reg_rule
);
1295 power_rule
= ®_rule
->power_rule
;
1296 freq_range
= ®_rule
->freq_range
;
1298 if (freq_range
->max_bandwidth_khz
< MHZ_TO_KHZ(40))
1299 bw_flags
= IEEE80211_CHAN_NO_HT40
;
1301 chan
->flags
|= map_regdom_flags(reg_rule
->flags
) | bw_flags
;
1302 chan
->max_antenna_gain
= (int) MBI_TO_DBI(power_rule
->max_antenna_gain
);
1303 chan
->max_power
= (int) MBM_TO_DBM(power_rule
->max_eirp
);
1306 static void handle_band_custom(struct wiphy
*wiphy
, enum ieee80211_band band
,
1307 const struct ieee80211_regdomain
*regd
)
1310 struct ieee80211_supported_band
*sband
;
1312 BUG_ON(!wiphy
->bands
[band
]);
1313 sband
= wiphy
->bands
[band
];
1315 for (i
= 0; i
< sband
->n_channels
; i
++)
1316 handle_channel_custom(wiphy
, band
, i
, regd
);
1319 /* Used by drivers prior to wiphy registration */
1320 void wiphy_apply_custom_regulatory(struct wiphy
*wiphy
,
1321 const struct ieee80211_regdomain
*regd
)
1323 enum ieee80211_band band
;
1324 unsigned int bands_set
= 0;
1326 mutex_lock(®_mutex
);
1327 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++) {
1328 if (!wiphy
->bands
[band
])
1330 handle_band_custom(wiphy
, band
, regd
);
1333 mutex_unlock(®_mutex
);
1336 * no point in calling this if it won't have any effect
1337 * on your device's supportd bands.
1339 WARN_ON(!bands_set
);
1341 EXPORT_SYMBOL(wiphy_apply_custom_regulatory
);
1344 * Return value which can be used by ignore_request() to indicate
1345 * it has been determined we should intersect two regulatory domains
1347 #define REG_INTERSECT 1
1349 /* This has the logic which determines when a new request
1350 * should be ignored. */
1351 static int ignore_request(struct wiphy
*wiphy
,
1352 struct regulatory_request
*pending_request
)
1354 struct wiphy
*last_wiphy
= NULL
;
1356 assert_cfg80211_lock();
1358 /* All initial requests are respected */
1362 switch (pending_request
->initiator
) {
1363 case NL80211_REGDOM_SET_BY_CORE
:
1365 case NL80211_REGDOM_SET_BY_COUNTRY_IE
:
1367 if (reg_request_cell_base(last_request
)) {
1368 /* Trust a Cell base station over the AP's country IE */
1369 if (regdom_changes(pending_request
->alpha2
))
1374 last_wiphy
= wiphy_idx_to_wiphy(last_request
->wiphy_idx
);
1376 if (unlikely(!is_an_alpha2(pending_request
->alpha2
)))
1378 if (last_request
->initiator
==
1379 NL80211_REGDOM_SET_BY_COUNTRY_IE
) {
1380 if (last_wiphy
!= wiphy
) {
1382 * Two cards with two APs claiming different
1383 * Country IE alpha2s. We could
1384 * intersect them, but that seems unlikely
1385 * to be correct. Reject second one for now.
1387 if (regdom_changes(pending_request
->alpha2
))
1392 * Two consecutive Country IE hints on the same wiphy.
1393 * This should be picked up early by the driver/stack
1395 if (WARN_ON(regdom_changes(pending_request
->alpha2
)))
1400 case NL80211_REGDOM_SET_BY_DRIVER
:
1401 if (last_request
->initiator
== NL80211_REGDOM_SET_BY_CORE
) {
1402 if (regdom_changes(pending_request
->alpha2
))
1408 * This would happen if you unplug and plug your card
1409 * back in or if you add a new device for which the previously
1410 * loaded card also agrees on the regulatory domain.
1412 if (last_request
->initiator
== NL80211_REGDOM_SET_BY_DRIVER
&&
1413 !regdom_changes(pending_request
->alpha2
))
1416 return REG_INTERSECT
;
1417 case NL80211_REGDOM_SET_BY_USER
:
1418 if (reg_request_cell_base(pending_request
))
1419 return reg_ignore_cell_hint(pending_request
);
1421 if (reg_request_cell_base(last_request
))
1424 if (last_request
->initiator
== NL80211_REGDOM_SET_BY_COUNTRY_IE
)
1425 return REG_INTERSECT
;
1427 * If the user knows better the user should set the regdom
1428 * to their country before the IE is picked up
1430 if (last_request
->initiator
== NL80211_REGDOM_SET_BY_USER
&&
1431 last_request
->intersect
)
1434 * Process user requests only after previous user/driver/core
1435 * requests have been processed
1437 if (last_request
->initiator
== NL80211_REGDOM_SET_BY_CORE
||
1438 last_request
->initiator
== NL80211_REGDOM_SET_BY_DRIVER
||
1439 last_request
->initiator
== NL80211_REGDOM_SET_BY_USER
) {
1440 if (regdom_changes(last_request
->alpha2
))
1444 if (!regdom_changes(pending_request
->alpha2
))
1453 static void reg_set_request_processed(void)
1455 bool need_more_processing
= false;
1457 last_request
->processed
= true;
1459 spin_lock(®_requests_lock
);
1460 if (!list_empty(®_requests_list
))
1461 need_more_processing
= true;
1462 spin_unlock(®_requests_lock
);
1464 if (last_request
->initiator
== NL80211_REGDOM_SET_BY_USER
)
1465 cancel_delayed_work(®_timeout
);
1467 if (need_more_processing
)
1468 schedule_work(®_work
);
1472 * __regulatory_hint - hint to the wireless core a regulatory domain
1473 * @wiphy: if the hint comes from country information from an AP, this
1474 * is required to be set to the wiphy that received the information
1475 * @pending_request: the regulatory request currently being processed
1477 * The Wireless subsystem can use this function to hint to the wireless core
1478 * what it believes should be the current regulatory domain.
1480 * Returns zero if all went fine, %-EALREADY if a regulatory domain had
1481 * already been set or other standard error codes.
1483 * Caller must hold &cfg80211_mutex and ®_mutex
1485 static int __regulatory_hint(struct wiphy
*wiphy
,
1486 struct regulatory_request
*pending_request
)
1488 bool intersect
= false;
1491 assert_cfg80211_lock();
1493 r
= ignore_request(wiphy
, pending_request
);
1495 if (r
== REG_INTERSECT
) {
1496 if (pending_request
->initiator
==
1497 NL80211_REGDOM_SET_BY_DRIVER
) {
1498 r
= reg_copy_regd(&wiphy
->regd
, cfg80211_regdomain
);
1500 kfree(pending_request
);
1507 * If the regulatory domain being requested by the
1508 * driver has already been set just copy it to the
1511 if (r
== -EALREADY
&&
1512 pending_request
->initiator
==
1513 NL80211_REGDOM_SET_BY_DRIVER
) {
1514 r
= reg_copy_regd(&wiphy
->regd
, cfg80211_regdomain
);
1516 kfree(pending_request
);
1522 kfree(pending_request
);
1527 if (last_request
!= &core_request_world
)
1528 kfree(last_request
);
1530 last_request
= pending_request
;
1531 last_request
->intersect
= intersect
;
1533 pending_request
= NULL
;
1535 if (last_request
->initiator
== NL80211_REGDOM_SET_BY_USER
) {
1536 user_alpha2
[0] = last_request
->alpha2
[0];
1537 user_alpha2
[1] = last_request
->alpha2
[1];
1540 /* When r == REG_INTERSECT we do need to call CRDA */
1543 * Since CRDA will not be called in this case as we already
1544 * have applied the requested regulatory domain before we just
1545 * inform userspace we have processed the request
1547 if (r
== -EALREADY
) {
1548 nl80211_send_reg_change_event(last_request
);
1549 reg_set_request_processed();
1554 return call_crda(last_request
->alpha2
);
1557 /* This processes *all* regulatory hints */
1558 static void reg_process_hint(struct regulatory_request
*reg_request
,
1559 enum nl80211_reg_initiator reg_initiator
)
1562 struct wiphy
*wiphy
= NULL
;
1564 BUG_ON(!reg_request
->alpha2
);
1566 if (wiphy_idx_valid(reg_request
->wiphy_idx
))
1567 wiphy
= wiphy_idx_to_wiphy(reg_request
->wiphy_idx
);
1569 if (reg_initiator
== NL80211_REGDOM_SET_BY_DRIVER
&&
1575 r
= __regulatory_hint(wiphy
, reg_request
);
1576 /* This is required so that the orig_* parameters are saved */
1577 if (r
== -EALREADY
&& wiphy
&&
1578 wiphy
->flags
& WIPHY_FLAG_STRICT_REGULATORY
) {
1579 wiphy_update_regulatory(wiphy
, reg_initiator
);
1584 * We only time out user hints, given that they should be the only
1585 * source of bogus requests.
1587 if (r
!= -EALREADY
&&
1588 reg_initiator
== NL80211_REGDOM_SET_BY_USER
)
1589 schedule_delayed_work(®_timeout
, msecs_to_jiffies(3142));
1593 * Processes regulatory hints, this is all the NL80211_REGDOM_SET_BY_*
1594 * Regulatory hints come on a first come first serve basis and we
1595 * must process each one atomically.
1597 static void reg_process_pending_hints(void)
1599 struct regulatory_request
*reg_request
;
1601 mutex_lock(&cfg80211_mutex
);
1602 mutex_lock(®_mutex
);
1604 /* When last_request->processed becomes true this will be rescheduled */
1605 if (last_request
&& !last_request
->processed
) {
1606 REG_DBG_PRINT("Pending regulatory request, waiting "
1607 "for it to be processed...\n");
1611 spin_lock(®_requests_lock
);
1613 if (list_empty(®_requests_list
)) {
1614 spin_unlock(®_requests_lock
);
1618 reg_request
= list_first_entry(®_requests_list
,
1619 struct regulatory_request
,
1621 list_del_init(®_request
->list
);
1623 spin_unlock(®_requests_lock
);
1625 reg_process_hint(reg_request
, reg_request
->initiator
);
1628 mutex_unlock(®_mutex
);
1629 mutex_unlock(&cfg80211_mutex
);
1632 /* Processes beacon hints -- this has nothing to do with country IEs */
1633 static void reg_process_pending_beacon_hints(void)
1635 struct cfg80211_registered_device
*rdev
;
1636 struct reg_beacon
*pending_beacon
, *tmp
;
1639 * No need to hold the reg_mutex here as we just touch wiphys
1640 * and do not read or access regulatory variables.
1642 mutex_lock(&cfg80211_mutex
);
1644 /* This goes through the _pending_ beacon list */
1645 spin_lock_bh(®_pending_beacons_lock
);
1647 if (list_empty(®_pending_beacons
)) {
1648 spin_unlock_bh(®_pending_beacons_lock
);
1652 list_for_each_entry_safe(pending_beacon
, tmp
,
1653 ®_pending_beacons
, list
) {
1655 list_del_init(&pending_beacon
->list
);
1657 /* Applies the beacon hint to current wiphys */
1658 list_for_each_entry(rdev
, &cfg80211_rdev_list
, list
)
1659 wiphy_update_new_beacon(&rdev
->wiphy
, pending_beacon
);
1661 /* Remembers the beacon hint for new wiphys or reg changes */
1662 list_add_tail(&pending_beacon
->list
, ®_beacon_list
);
1665 spin_unlock_bh(®_pending_beacons_lock
);
1667 mutex_unlock(&cfg80211_mutex
);
1670 static void reg_todo(struct work_struct
*work
)
1672 reg_process_pending_hints();
1673 reg_process_pending_beacon_hints();
1676 static void queue_regulatory_request(struct regulatory_request
*request
)
1678 if (isalpha(request
->alpha2
[0]))
1679 request
->alpha2
[0] = toupper(request
->alpha2
[0]);
1680 if (isalpha(request
->alpha2
[1]))
1681 request
->alpha2
[1] = toupper(request
->alpha2
[1]);
1683 spin_lock(®_requests_lock
);
1684 list_add_tail(&request
->list
, ®_requests_list
);
1685 spin_unlock(®_requests_lock
);
1687 schedule_work(®_work
);
1691 * Core regulatory hint -- happens during cfg80211_init()
1692 * and when we restore regulatory settings.
1694 static int regulatory_hint_core(const char *alpha2
)
1696 struct regulatory_request
*request
;
1698 request
= kzalloc(sizeof(struct regulatory_request
),
1703 request
->alpha2
[0] = alpha2
[0];
1704 request
->alpha2
[1] = alpha2
[1];
1705 request
->initiator
= NL80211_REGDOM_SET_BY_CORE
;
1707 queue_regulatory_request(request
);
1713 int regulatory_hint_user(const char *alpha2
,
1714 enum nl80211_user_reg_hint_type user_reg_hint_type
)
1716 struct regulatory_request
*request
;
1720 request
= kzalloc(sizeof(struct regulatory_request
), GFP_KERNEL
);
1724 request
->wiphy_idx
= WIPHY_IDX_STALE
;
1725 request
->alpha2
[0] = alpha2
[0];
1726 request
->alpha2
[1] = alpha2
[1];
1727 request
->initiator
= NL80211_REGDOM_SET_BY_USER
;
1728 request
->user_reg_hint_type
= user_reg_hint_type
;
1730 queue_regulatory_request(request
);
1736 int regulatory_hint(struct wiphy
*wiphy
, const char *alpha2
)
1738 struct regulatory_request
*request
;
1743 request
= kzalloc(sizeof(struct regulatory_request
), GFP_KERNEL
);
1747 request
->wiphy_idx
= get_wiphy_idx(wiphy
);
1749 /* Must have registered wiphy first */
1750 BUG_ON(!wiphy_idx_valid(request
->wiphy_idx
));
1752 request
->alpha2
[0] = alpha2
[0];
1753 request
->alpha2
[1] = alpha2
[1];
1754 request
->initiator
= NL80211_REGDOM_SET_BY_DRIVER
;
1756 queue_regulatory_request(request
);
1760 EXPORT_SYMBOL(regulatory_hint
);
1763 * We hold wdev_lock() here so we cannot hold cfg80211_mutex() and
1764 * therefore cannot iterate over the rdev list here.
1766 void regulatory_hint_11d(struct wiphy
*wiphy
,
1767 enum ieee80211_band band
,
1772 enum environment_cap env
= ENVIRON_ANY
;
1773 struct regulatory_request
*request
;
1775 mutex_lock(®_mutex
);
1777 if (unlikely(!last_request
))
1780 /* IE len must be evenly divisible by 2 */
1781 if (country_ie_len
& 0x01)
1784 if (country_ie_len
< IEEE80211_COUNTRY_IE_MIN_LEN
)
1787 alpha2
[0] = country_ie
[0];
1788 alpha2
[1] = country_ie
[1];
1790 if (country_ie
[2] == 'I')
1791 env
= ENVIRON_INDOOR
;
1792 else if (country_ie
[2] == 'O')
1793 env
= ENVIRON_OUTDOOR
;
1796 * We will run this only upon a successful connection on cfg80211.
1797 * We leave conflict resolution to the workqueue, where can hold
1800 if (likely(last_request
->initiator
==
1801 NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
1802 wiphy_idx_valid(last_request
->wiphy_idx
)))
1805 request
= kzalloc(sizeof(struct regulatory_request
), GFP_KERNEL
);
1809 request
->wiphy_idx
= get_wiphy_idx(wiphy
);
1810 request
->alpha2
[0] = alpha2
[0];
1811 request
->alpha2
[1] = alpha2
[1];
1812 request
->initiator
= NL80211_REGDOM_SET_BY_COUNTRY_IE
;
1813 request
->country_ie_env
= env
;
1815 mutex_unlock(®_mutex
);
1817 queue_regulatory_request(request
);
1822 mutex_unlock(®_mutex
);
1825 static void restore_alpha2(char *alpha2
, bool reset_user
)
1827 /* indicates there is no alpha2 to consider for restoration */
1831 /* The user setting has precedence over the module parameter */
1832 if (is_user_regdom_saved()) {
1833 /* Unless we're asked to ignore it and reset it */
1835 REG_DBG_PRINT("Restoring regulatory settings "
1836 "including user preference\n");
1837 user_alpha2
[0] = '9';
1838 user_alpha2
[1] = '7';
1841 * If we're ignoring user settings, we still need to
1842 * check the module parameter to ensure we put things
1843 * back as they were for a full restore.
1845 if (!is_world_regdom(ieee80211_regdom
)) {
1846 REG_DBG_PRINT("Keeping preference on "
1847 "module parameter ieee80211_regdom: %c%c\n",
1848 ieee80211_regdom
[0],
1849 ieee80211_regdom
[1]);
1850 alpha2
[0] = ieee80211_regdom
[0];
1851 alpha2
[1] = ieee80211_regdom
[1];
1854 REG_DBG_PRINT("Restoring regulatory settings "
1855 "while preserving user preference for: %c%c\n",
1858 alpha2
[0] = user_alpha2
[0];
1859 alpha2
[1] = user_alpha2
[1];
1861 } else if (!is_world_regdom(ieee80211_regdom
)) {
1862 REG_DBG_PRINT("Keeping preference on "
1863 "module parameter ieee80211_regdom: %c%c\n",
1864 ieee80211_regdom
[0],
1865 ieee80211_regdom
[1]);
1866 alpha2
[0] = ieee80211_regdom
[0];
1867 alpha2
[1] = ieee80211_regdom
[1];
1869 REG_DBG_PRINT("Restoring regulatory settings\n");
1872 static void restore_custom_reg_settings(struct wiphy
*wiphy
)
1874 struct ieee80211_supported_band
*sband
;
1875 enum ieee80211_band band
;
1876 struct ieee80211_channel
*chan
;
1879 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++) {
1880 sband
= wiphy
->bands
[band
];
1883 for (i
= 0; i
< sband
->n_channels
; i
++) {
1884 chan
= &sband
->channels
[i
];
1885 chan
->flags
= chan
->orig_flags
;
1886 chan
->max_antenna_gain
= chan
->orig_mag
;
1887 chan
->max_power
= chan
->orig_mpwr
;
1893 * Restoring regulatory settings involves ingoring any
1894 * possibly stale country IE information and user regulatory
1895 * settings if so desired, this includes any beacon hints
1896 * learned as we could have traveled outside to another country
1897 * after disconnection. To restore regulatory settings we do
1898 * exactly what we did at bootup:
1900 * - send a core regulatory hint
1901 * - send a user regulatory hint if applicable
1903 * Device drivers that send a regulatory hint for a specific country
1904 * keep their own regulatory domain on wiphy->regd so that does does
1905 * not need to be remembered.
1907 static void restore_regulatory_settings(bool reset_user
)
1910 char world_alpha2
[2];
1911 struct reg_beacon
*reg_beacon
, *btmp
;
1912 struct regulatory_request
*reg_request
, *tmp
;
1913 LIST_HEAD(tmp_reg_req_list
);
1914 struct cfg80211_registered_device
*rdev
;
1916 mutex_lock(&cfg80211_mutex
);
1917 mutex_lock(®_mutex
);
1919 reset_regdomains(true);
1920 restore_alpha2(alpha2
, reset_user
);
1923 * If there's any pending requests we simply
1924 * stash them to a temporary pending queue and
1925 * add then after we've restored regulatory
1928 spin_lock(®_requests_lock
);
1929 if (!list_empty(®_requests_list
)) {
1930 list_for_each_entry_safe(reg_request
, tmp
,
1931 ®_requests_list
, list
) {
1932 if (reg_request
->initiator
!=
1933 NL80211_REGDOM_SET_BY_USER
)
1935 list_del(®_request
->list
);
1936 list_add_tail(®_request
->list
, &tmp_reg_req_list
);
1939 spin_unlock(®_requests_lock
);
1941 /* Clear beacon hints */
1942 spin_lock_bh(®_pending_beacons_lock
);
1943 if (!list_empty(®_pending_beacons
)) {
1944 list_for_each_entry_safe(reg_beacon
, btmp
,
1945 ®_pending_beacons
, list
) {
1946 list_del(®_beacon
->list
);
1950 spin_unlock_bh(®_pending_beacons_lock
);
1952 if (!list_empty(®_beacon_list
)) {
1953 list_for_each_entry_safe(reg_beacon
, btmp
,
1954 ®_beacon_list
, list
) {
1955 list_del(®_beacon
->list
);
1960 /* First restore to the basic regulatory settings */
1961 cfg80211_regdomain
= cfg80211_world_regdom
;
1962 world_alpha2
[0] = cfg80211_regdomain
->alpha2
[0];
1963 world_alpha2
[1] = cfg80211_regdomain
->alpha2
[1];
1965 list_for_each_entry(rdev
, &cfg80211_rdev_list
, list
) {
1966 if (rdev
->wiphy
.flags
& WIPHY_FLAG_CUSTOM_REGULATORY
)
1967 restore_custom_reg_settings(&rdev
->wiphy
);
1970 mutex_unlock(®_mutex
);
1971 mutex_unlock(&cfg80211_mutex
);
1973 regulatory_hint_core(world_alpha2
);
1976 * This restores the ieee80211_regdom module parameter
1977 * preference or the last user requested regulatory
1978 * settings, user regulatory settings takes precedence.
1980 if (is_an_alpha2(alpha2
))
1981 regulatory_hint_user(user_alpha2
, NL80211_USER_REG_HINT_USER
);
1983 if (list_empty(&tmp_reg_req_list
))
1986 mutex_lock(&cfg80211_mutex
);
1987 mutex_lock(®_mutex
);
1989 spin_lock(®_requests_lock
);
1990 list_for_each_entry_safe(reg_request
, tmp
, &tmp_reg_req_list
, list
) {
1991 REG_DBG_PRINT("Adding request for country %c%c back "
1993 reg_request
->alpha2
[0],
1994 reg_request
->alpha2
[1]);
1995 list_del(®_request
->list
);
1996 list_add_tail(®_request
->list
, ®_requests_list
);
1998 spin_unlock(®_requests_lock
);
2000 mutex_unlock(®_mutex
);
2001 mutex_unlock(&cfg80211_mutex
);
2003 REG_DBG_PRINT("Kicking the queue\n");
2005 schedule_work(®_work
);
2008 void regulatory_hint_disconnect(void)
2010 REG_DBG_PRINT("All devices are disconnected, going to "
2011 "restore regulatory settings\n");
2012 restore_regulatory_settings(false);
2015 static bool freq_is_chan_12_13_14(u16 freq
)
2017 if (freq
== ieee80211_channel_to_frequency(12, IEEE80211_BAND_2GHZ
) ||
2018 freq
== ieee80211_channel_to_frequency(13, IEEE80211_BAND_2GHZ
) ||
2019 freq
== ieee80211_channel_to_frequency(14, IEEE80211_BAND_2GHZ
))
2024 int regulatory_hint_found_beacon(struct wiphy
*wiphy
,
2025 struct ieee80211_channel
*beacon_chan
,
2028 struct reg_beacon
*reg_beacon
;
2030 if (likely((beacon_chan
->beacon_found
||
2031 (beacon_chan
->flags
& IEEE80211_CHAN_RADAR
) ||
2032 (beacon_chan
->band
== IEEE80211_BAND_2GHZ
&&
2033 !freq_is_chan_12_13_14(beacon_chan
->center_freq
)))))
2036 reg_beacon
= kzalloc(sizeof(struct reg_beacon
), gfp
);
2040 REG_DBG_PRINT("Found new beacon on "
2041 "frequency: %d MHz (Ch %d) on %s\n",
2042 beacon_chan
->center_freq
,
2043 ieee80211_frequency_to_channel(beacon_chan
->center_freq
),
2046 memcpy(®_beacon
->chan
, beacon_chan
,
2047 sizeof(struct ieee80211_channel
));
2051 * Since we can be called from BH or and non-BH context
2052 * we must use spin_lock_bh()
2054 spin_lock_bh(®_pending_beacons_lock
);
2055 list_add_tail(®_beacon
->list
, ®_pending_beacons
);
2056 spin_unlock_bh(®_pending_beacons_lock
);
2058 schedule_work(®_work
);
2063 static void print_rd_rules(const struct ieee80211_regdomain
*rd
)
2066 const struct ieee80211_reg_rule
*reg_rule
= NULL
;
2067 const struct ieee80211_freq_range
*freq_range
= NULL
;
2068 const struct ieee80211_power_rule
*power_rule
= NULL
;
2070 pr_info(" (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)\n");
2072 for (i
= 0; i
< rd
->n_reg_rules
; i
++) {
2073 reg_rule
= &rd
->reg_rules
[i
];
2074 freq_range
= ®_rule
->freq_range
;
2075 power_rule
= ®_rule
->power_rule
;
2078 * There may not be documentation for max antenna gain
2079 * in certain regions
2081 if (power_rule
->max_antenna_gain
)
2082 pr_info(" (%d KHz - %d KHz @ %d KHz), (%d mBi, %d mBm)\n",
2083 freq_range
->start_freq_khz
,
2084 freq_range
->end_freq_khz
,
2085 freq_range
->max_bandwidth_khz
,
2086 power_rule
->max_antenna_gain
,
2087 power_rule
->max_eirp
);
2089 pr_info(" (%d KHz - %d KHz @ %d KHz), (N/A, %d mBm)\n",
2090 freq_range
->start_freq_khz
,
2091 freq_range
->end_freq_khz
,
2092 freq_range
->max_bandwidth_khz
,
2093 power_rule
->max_eirp
);
2097 bool reg_supported_dfs_region(u8 dfs_region
)
2099 switch (dfs_region
) {
2100 case NL80211_DFS_UNSET
:
2101 case NL80211_DFS_FCC
:
2102 case NL80211_DFS_ETSI
:
2103 case NL80211_DFS_JP
:
2106 REG_DBG_PRINT("Ignoring uknown DFS master region: %d\n",
2112 static void print_dfs_region(u8 dfs_region
)
2117 switch (dfs_region
) {
2118 case NL80211_DFS_FCC
:
2119 pr_info(" DFS Master region FCC");
2121 case NL80211_DFS_ETSI
:
2122 pr_info(" DFS Master region ETSI");
2124 case NL80211_DFS_JP
:
2125 pr_info(" DFS Master region JP");
2128 pr_info(" DFS Master region Uknown");
2133 static void print_regdomain(const struct ieee80211_regdomain
*rd
)
2136 if (is_intersected_alpha2(rd
->alpha2
)) {
2138 if (last_request
->initiator
==
2139 NL80211_REGDOM_SET_BY_COUNTRY_IE
) {
2140 struct cfg80211_registered_device
*rdev
;
2141 rdev
= cfg80211_rdev_by_wiphy_idx(
2142 last_request
->wiphy_idx
);
2144 pr_info("Current regulatory domain updated by AP to: %c%c\n",
2145 rdev
->country_ie_alpha2
[0],
2146 rdev
->country_ie_alpha2
[1]);
2148 pr_info("Current regulatory domain intersected:\n");
2150 pr_info("Current regulatory domain intersected:\n");
2151 } else if (is_world_regdom(rd
->alpha2
))
2152 pr_info("World regulatory domain updated:\n");
2154 if (is_unknown_alpha2(rd
->alpha2
))
2155 pr_info("Regulatory domain changed to driver built-in settings (unknown country)\n");
2157 if (reg_request_cell_base(last_request
))
2158 pr_info("Regulatory domain changed "
2159 "to country: %c%c by Cell Station\n",
2160 rd
->alpha2
[0], rd
->alpha2
[1]);
2162 pr_info("Regulatory domain changed "
2163 "to country: %c%c\n",
2164 rd
->alpha2
[0], rd
->alpha2
[1]);
2167 print_dfs_region(rd
->dfs_region
);
2171 static void print_regdomain_info(const struct ieee80211_regdomain
*rd
)
2173 pr_info("Regulatory domain: %c%c\n", rd
->alpha2
[0], rd
->alpha2
[1]);
2177 /* Takes ownership of rd only if it doesn't fail */
2178 static int __set_regdom(const struct ieee80211_regdomain
*rd
)
2180 const struct ieee80211_regdomain
*intersected_rd
= NULL
;
2181 struct cfg80211_registered_device
*rdev
= NULL
;
2182 struct wiphy
*request_wiphy
;
2183 /* Some basic sanity checks first */
2185 if (is_world_regdom(rd
->alpha2
)) {
2186 if (WARN_ON(!reg_is_valid_request(rd
->alpha2
)))
2188 update_world_regdomain(rd
);
2192 if (!is_alpha2_set(rd
->alpha2
) && !is_an_alpha2(rd
->alpha2
) &&
2193 !is_unknown_alpha2(rd
->alpha2
))
2200 * Lets only bother proceeding on the same alpha2 if the current
2201 * rd is non static (it means CRDA was present and was used last)
2202 * and the pending request came in from a country IE
2204 if (last_request
->initiator
!= NL80211_REGDOM_SET_BY_COUNTRY_IE
) {
2206 * If someone else asked us to change the rd lets only bother
2207 * checking if the alpha2 changes if CRDA was already called
2209 if (!regdom_changes(rd
->alpha2
))
2214 * Now lets set the regulatory domain, update all driver channels
2215 * and finally inform them of what we have done, in case they want
2216 * to review or adjust their own settings based on their own
2217 * internal EEPROM data
2220 if (WARN_ON(!reg_is_valid_request(rd
->alpha2
)))
2223 if (!is_valid_rd(rd
)) {
2224 pr_err("Invalid regulatory domain detected:\n");
2225 print_regdomain_info(rd
);
2229 request_wiphy
= wiphy_idx_to_wiphy(last_request
->wiphy_idx
);
2230 if (!request_wiphy
&&
2231 (last_request
->initiator
== NL80211_REGDOM_SET_BY_DRIVER
||
2232 last_request
->initiator
== NL80211_REGDOM_SET_BY_COUNTRY_IE
)) {
2233 schedule_delayed_work(®_timeout
, 0);
2237 if (!last_request
->intersect
) {
2240 if (last_request
->initiator
!= NL80211_REGDOM_SET_BY_DRIVER
) {
2241 reset_regdomains(false);
2242 cfg80211_regdomain
= rd
;
2247 * For a driver hint, lets copy the regulatory domain the
2248 * driver wanted to the wiphy to deal with conflicts
2252 * Userspace could have sent two replies with only
2253 * one kernel request.
2255 if (request_wiphy
->regd
)
2258 r
= reg_copy_regd(&request_wiphy
->regd
, rd
);
2262 reset_regdomains(false);
2263 cfg80211_regdomain
= rd
;
2267 /* Intersection requires a bit more work */
2269 if (last_request
->initiator
!= NL80211_REGDOM_SET_BY_COUNTRY_IE
) {
2271 intersected_rd
= regdom_intersect(rd
, cfg80211_regdomain
);
2272 if (!intersected_rd
)
2276 * We can trash what CRDA provided now.
2277 * However if a driver requested this specific regulatory
2278 * domain we keep it for its private use
2280 if (last_request
->initiator
== NL80211_REGDOM_SET_BY_DRIVER
)
2281 request_wiphy
->regd
= rd
;
2287 reset_regdomains(false);
2288 cfg80211_regdomain
= intersected_rd
;
2293 if (!intersected_rd
)
2296 rdev
= wiphy_to_dev(request_wiphy
);
2298 rdev
->country_ie_alpha2
[0] = rd
->alpha2
[0];
2299 rdev
->country_ie_alpha2
[1] = rd
->alpha2
[1];
2300 rdev
->env
= last_request
->country_ie_env
;
2302 BUG_ON(intersected_rd
== rd
);
2307 reset_regdomains(false);
2308 cfg80211_regdomain
= intersected_rd
;
2315 * Use this call to set the current regulatory domain. Conflicts with
2316 * multiple drivers can be ironed out later. Caller must've already
2317 * kmalloc'd the rd structure. Caller must hold cfg80211_mutex
2319 int set_regdom(const struct ieee80211_regdomain
*rd
)
2323 assert_cfg80211_lock();
2325 mutex_lock(®_mutex
);
2327 /* Note that this doesn't update the wiphys, this is done below */
2328 r
= __set_regdom(rd
);
2331 reg_set_request_processed();
2334 mutex_unlock(®_mutex
);
2338 /* This would make this whole thing pointless */
2339 if (!last_request
->intersect
)
2340 BUG_ON(rd
!= cfg80211_regdomain
);
2342 /* update all wiphys now with the new established regulatory domain */
2343 update_all_wiphy_regulatory(last_request
->initiator
);
2345 print_regdomain(cfg80211_regdomain
);
2347 nl80211_send_reg_change_event(last_request
);
2349 reg_set_request_processed();
2351 mutex_unlock(®_mutex
);
2356 #ifdef CONFIG_HOTPLUG
2357 int reg_device_uevent(struct device
*dev
, struct kobj_uevent_env
*env
)
2359 if (last_request
&& !last_request
->processed
) {
2360 if (add_uevent_var(env
, "COUNTRY=%c%c",
2361 last_request
->alpha2
[0],
2362 last_request
->alpha2
[1]))
2369 int reg_device_uevent(struct device
*dev
, struct kobj_uevent_env
*env
)
2373 #endif /* CONFIG_HOTPLUG */
2375 void wiphy_regulatory_register(struct wiphy
*wiphy
)
2377 assert_cfg80211_lock();
2379 mutex_lock(®_mutex
);
2381 if (!reg_dev_ignore_cell_hint(wiphy
))
2382 reg_num_devs_support_basehint
++;
2384 wiphy_update_regulatory(wiphy
, NL80211_REGDOM_SET_BY_CORE
);
2386 mutex_unlock(®_mutex
);
2389 /* Caller must hold cfg80211_mutex */
2390 void wiphy_regulatory_deregister(struct wiphy
*wiphy
)
2392 struct wiphy
*request_wiphy
= NULL
;
2394 assert_cfg80211_lock();
2396 mutex_lock(®_mutex
);
2398 if (!reg_dev_ignore_cell_hint(wiphy
))
2399 reg_num_devs_support_basehint
--;
2404 request_wiphy
= wiphy_idx_to_wiphy(last_request
->wiphy_idx
);
2406 if (!request_wiphy
|| request_wiphy
!= wiphy
)
2409 last_request
->wiphy_idx
= WIPHY_IDX_STALE
;
2410 last_request
->country_ie_env
= ENVIRON_ANY
;
2412 mutex_unlock(®_mutex
);
2415 static void reg_timeout_work(struct work_struct
*work
)
2417 REG_DBG_PRINT("Timeout while waiting for CRDA to reply, "
2418 "restoring regulatory settings\n");
2419 restore_regulatory_settings(true);
2422 int __init
regulatory_init(void)
2426 reg_pdev
= platform_device_register_simple("regulatory", 0, NULL
, 0);
2427 if (IS_ERR(reg_pdev
))
2428 return PTR_ERR(reg_pdev
);
2430 reg_pdev
->dev
.type
= ®_device_type
;
2432 spin_lock_init(®_requests_lock
);
2433 spin_lock_init(®_pending_beacons_lock
);
2435 reg_regdb_size_check();
2437 cfg80211_regdomain
= cfg80211_world_regdom
;
2439 user_alpha2
[0] = '9';
2440 user_alpha2
[1] = '7';
2442 /* We always try to get an update for the static regdomain */
2443 err
= regulatory_hint_core(cfg80211_regdomain
->alpha2
);
2448 * N.B. kobject_uevent_env() can fail mainly for when we're out
2449 * memory which is handled and propagated appropriately above
2450 * but it can also fail during a netlink_broadcast() or during
2451 * early boot for call_usermodehelper(). For now treat these
2452 * errors as non-fatal.
2454 pr_err("kobject_uevent_env() was unable to call CRDA during init\n");
2455 #ifdef CONFIG_CFG80211_REG_DEBUG
2456 /* We want to find out exactly why when debugging */
2462 * Finally, if the user set the module parameter treat it
2465 if (!is_world_regdom(ieee80211_regdom
))
2466 regulatory_hint_user(ieee80211_regdom
,
2467 NL80211_USER_REG_HINT_USER
);
2472 void /* __init_or_exit */ regulatory_exit(void)
2474 struct regulatory_request
*reg_request
, *tmp
;
2475 struct reg_beacon
*reg_beacon
, *btmp
;
2477 cancel_work_sync(®_work
);
2478 cancel_delayed_work_sync(®_timeout
);
2480 mutex_lock(&cfg80211_mutex
);
2481 mutex_lock(®_mutex
);
2483 reset_regdomains(true);
2485 dev_set_uevent_suppress(®_pdev
->dev
, true);
2487 platform_device_unregister(reg_pdev
);
2489 spin_lock_bh(®_pending_beacons_lock
);
2490 if (!list_empty(®_pending_beacons
)) {
2491 list_for_each_entry_safe(reg_beacon
, btmp
,
2492 ®_pending_beacons
, list
) {
2493 list_del(®_beacon
->list
);
2497 spin_unlock_bh(®_pending_beacons_lock
);
2499 if (!list_empty(®_beacon_list
)) {
2500 list_for_each_entry_safe(reg_beacon
, btmp
,
2501 ®_beacon_list
, list
) {
2502 list_del(®_beacon
->list
);
2507 spin_lock(®_requests_lock
);
2508 if (!list_empty(®_requests_list
)) {
2509 list_for_each_entry_safe(reg_request
, tmp
,
2510 ®_requests_list
, list
) {
2511 list_del(®_request
->list
);
2515 spin_unlock(®_requests_lock
);
2517 mutex_unlock(®_mutex
);
2518 mutex_unlock(&cfg80211_mutex
);