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 if (rd_flags
& NL80211_RRF_NO_OFDM
)
684 channel_flags
|= IEEE80211_CHAN_NO_OFDM
;
685 return channel_flags
;
688 static int freq_reg_info_regd(struct wiphy
*wiphy
,
691 const struct ieee80211_reg_rule
**reg_rule
,
692 const struct ieee80211_regdomain
*custom_regd
)
695 bool band_rule_found
= false;
696 const struct ieee80211_regdomain
*regd
;
697 bool bw_fits
= false;
700 desired_bw_khz
= MHZ_TO_KHZ(20);
702 regd
= custom_regd
? custom_regd
: cfg80211_regdomain
;
705 * Follow the driver's regulatory domain, if present, unless a country
706 * IE has been processed or a user wants to help complaince further
709 last_request
->initiator
!= NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
710 last_request
->initiator
!= NL80211_REGDOM_SET_BY_USER
&&
717 for (i
= 0; i
< regd
->n_reg_rules
; i
++) {
718 const struct ieee80211_reg_rule
*rr
;
719 const struct ieee80211_freq_range
*fr
= NULL
;
721 rr
= ®d
->reg_rules
[i
];
722 fr
= &rr
->freq_range
;
725 * We only need to know if one frequency rule was
726 * was in center_freq's band, that's enough, so lets
727 * not overwrite it once found
729 if (!band_rule_found
)
730 band_rule_found
= freq_in_rule_band(fr
, center_freq
);
732 bw_fits
= reg_does_bw_fit(fr
,
736 if (band_rule_found
&& bw_fits
) {
742 if (!band_rule_found
)
748 int freq_reg_info(struct wiphy
*wiphy
,
751 const struct ieee80211_reg_rule
**reg_rule
)
753 assert_cfg80211_lock();
754 return freq_reg_info_regd(wiphy
,
760 EXPORT_SYMBOL(freq_reg_info
);
762 #ifdef CONFIG_CFG80211_REG_DEBUG
763 static const char *reg_initiator_name(enum nl80211_reg_initiator initiator
)
766 case NL80211_REGDOM_SET_BY_CORE
:
767 return "Set by core";
768 case NL80211_REGDOM_SET_BY_USER
:
769 return "Set by user";
770 case NL80211_REGDOM_SET_BY_DRIVER
:
771 return "Set by driver";
772 case NL80211_REGDOM_SET_BY_COUNTRY_IE
:
773 return "Set by country IE";
780 static void chan_reg_rule_print_dbg(struct ieee80211_channel
*chan
,
782 const struct ieee80211_reg_rule
*reg_rule
)
784 const struct ieee80211_power_rule
*power_rule
;
785 const struct ieee80211_freq_range
*freq_range
;
786 char max_antenna_gain
[32];
788 power_rule
= ®_rule
->power_rule
;
789 freq_range
= ®_rule
->freq_range
;
791 if (!power_rule
->max_antenna_gain
)
792 snprintf(max_antenna_gain
, 32, "N/A");
794 snprintf(max_antenna_gain
, 32, "%d", power_rule
->max_antenna_gain
);
796 REG_DBG_PRINT("Updating information on frequency %d MHz "
797 "for a %d MHz width channel with regulatory rule:\n",
799 KHZ_TO_MHZ(desired_bw_khz
));
801 REG_DBG_PRINT("%d KHz - %d KHz @ %d KHz), (%s mBi, %d mBm)\n",
802 freq_range
->start_freq_khz
,
803 freq_range
->end_freq_khz
,
804 freq_range
->max_bandwidth_khz
,
806 power_rule
->max_eirp
);
809 static void chan_reg_rule_print_dbg(struct ieee80211_channel
*chan
,
811 const struct ieee80211_reg_rule
*reg_rule
)
818 * Note that right now we assume the desired channel bandwidth
819 * is always 20 MHz for each individual channel (HT40 uses 20 MHz
820 * per channel, the primary and the extension channel). To support
821 * smaller custom bandwidths such as 5 MHz or 10 MHz we'll need a
822 * new ieee80211_channel.target_bw and re run the regulatory check
823 * on the wiphy with the target_bw specified. Then we can simply use
824 * that below for the desired_bw_khz below.
826 static void handle_channel(struct wiphy
*wiphy
,
827 enum nl80211_reg_initiator initiator
,
828 enum ieee80211_band band
,
829 unsigned int chan_idx
)
832 u32 flags
, bw_flags
= 0;
833 u32 desired_bw_khz
= MHZ_TO_KHZ(20);
834 const struct ieee80211_reg_rule
*reg_rule
= NULL
;
835 const struct ieee80211_power_rule
*power_rule
= NULL
;
836 const struct ieee80211_freq_range
*freq_range
= NULL
;
837 struct ieee80211_supported_band
*sband
;
838 struct ieee80211_channel
*chan
;
839 struct wiphy
*request_wiphy
= NULL
;
841 assert_cfg80211_lock();
843 request_wiphy
= wiphy_idx_to_wiphy(last_request
->wiphy_idx
);
845 sband
= wiphy
->bands
[band
];
846 BUG_ON(chan_idx
>= sband
->n_channels
);
847 chan
= &sband
->channels
[chan_idx
];
849 flags
= chan
->orig_flags
;
851 r
= freq_reg_info(wiphy
,
852 MHZ_TO_KHZ(chan
->center_freq
),
858 * We will disable all channels that do not match our
859 * received regulatory rule unless the hint is coming
860 * from a Country IE and the Country IE had no information
861 * about a band. The IEEE 802.11 spec allows for an AP
862 * to send only a subset of the regulatory rules allowed,
863 * so an AP in the US that only supports 2.4 GHz may only send
864 * a country IE with information for the 2.4 GHz band
865 * while 5 GHz is still supported.
867 if (initiator
== NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
871 REG_DBG_PRINT("Disabling freq %d MHz\n", chan
->center_freq
);
872 chan
->flags
= IEEE80211_CHAN_DISABLED
;
876 chan_reg_rule_print_dbg(chan
, desired_bw_khz
, reg_rule
);
878 power_rule
= ®_rule
->power_rule
;
879 freq_range
= ®_rule
->freq_range
;
881 if (freq_range
->max_bandwidth_khz
< MHZ_TO_KHZ(40))
882 bw_flags
= IEEE80211_CHAN_NO_HT40
;
884 if (last_request
->initiator
== NL80211_REGDOM_SET_BY_DRIVER
&&
885 request_wiphy
&& request_wiphy
== wiphy
&&
886 request_wiphy
->flags
& WIPHY_FLAG_STRICT_REGULATORY
) {
888 * This guarantees the driver's requested regulatory domain
889 * will always be used as a base for further regulatory
892 chan
->flags
= chan
->orig_flags
=
893 map_regdom_flags(reg_rule
->flags
) | bw_flags
;
894 chan
->max_antenna_gain
= chan
->orig_mag
=
895 (int) MBI_TO_DBI(power_rule
->max_antenna_gain
);
896 chan
->max_power
= chan
->orig_mpwr
=
897 (int) MBM_TO_DBM(power_rule
->max_eirp
);
901 chan
->beacon_found
= false;
902 chan
->flags
= flags
| bw_flags
| map_regdom_flags(reg_rule
->flags
);
903 chan
->max_antenna_gain
= min(chan
->orig_mag
,
904 (int) MBI_TO_DBI(power_rule
->max_antenna_gain
));
905 chan
->max_reg_power
= (int) MBM_TO_DBM(power_rule
->max_eirp
);
906 if (chan
->orig_mpwr
) {
908 * Devices that have their own custom regulatory domain
909 * but also use WIPHY_FLAG_STRICT_REGULATORY will follow the
910 * passed country IE power settings.
912 if (initiator
== NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
913 wiphy
->flags
& WIPHY_FLAG_CUSTOM_REGULATORY
&&
914 wiphy
->flags
& WIPHY_FLAG_STRICT_REGULATORY
)
915 chan
->max_power
= chan
->max_reg_power
;
917 chan
->max_power
= min(chan
->orig_mpwr
,
918 chan
->max_reg_power
);
920 chan
->max_power
= chan
->max_reg_power
;
923 static void handle_band(struct wiphy
*wiphy
,
924 enum ieee80211_band band
,
925 enum nl80211_reg_initiator initiator
)
928 struct ieee80211_supported_band
*sband
;
930 BUG_ON(!wiphy
->bands
[band
]);
931 sband
= wiphy
->bands
[band
];
933 for (i
= 0; i
< sband
->n_channels
; i
++)
934 handle_channel(wiphy
, initiator
, band
, i
);
937 static bool reg_request_cell_base(struct regulatory_request
*request
)
939 if (request
->initiator
!= NL80211_REGDOM_SET_BY_USER
)
941 if (request
->user_reg_hint_type
!= NL80211_USER_REG_HINT_CELL_BASE
)
946 bool reg_last_request_cell_base(void)
949 assert_cfg80211_lock();
951 mutex_lock(®_mutex
);
952 val
= reg_request_cell_base(last_request
);
953 mutex_unlock(®_mutex
);
957 #ifdef CONFIG_CFG80211_CERTIFICATION_ONUS
959 /* Core specific check */
960 static int reg_ignore_cell_hint(struct regulatory_request
*pending_request
)
962 if (!reg_num_devs_support_basehint
)
965 if (reg_request_cell_base(last_request
)) {
966 if (!regdom_changes(pending_request
->alpha2
))
973 /* Device specific check */
974 static bool reg_dev_ignore_cell_hint(struct wiphy
*wiphy
)
976 if (!(wiphy
->features
& NL80211_FEATURE_CELL_BASE_REG_HINTS
))
981 static int reg_ignore_cell_hint(struct regulatory_request
*pending_request
)
985 static int reg_dev_ignore_cell_hint(struct wiphy
*wiphy
)
992 static bool ignore_reg_update(struct wiphy
*wiphy
,
993 enum nl80211_reg_initiator initiator
)
996 REG_DBG_PRINT("Ignoring regulatory request %s since "
997 "last_request is not set\n",
998 reg_initiator_name(initiator
));
1002 if (initiator
== NL80211_REGDOM_SET_BY_CORE
&&
1003 wiphy
->flags
& WIPHY_FLAG_CUSTOM_REGULATORY
) {
1004 REG_DBG_PRINT("Ignoring regulatory request %s "
1005 "since the driver uses its own custom "
1006 "regulatory domain\n",
1007 reg_initiator_name(initiator
));
1012 * wiphy->regd will be set once the device has its own
1013 * desired regulatory domain set
1015 if (wiphy
->flags
& WIPHY_FLAG_STRICT_REGULATORY
&& !wiphy
->regd
&&
1016 initiator
!= NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
1017 !is_world_regdom(last_request
->alpha2
)) {
1018 REG_DBG_PRINT("Ignoring regulatory request %s "
1019 "since the driver requires its own regulatory "
1020 "domain to be set first\n",
1021 reg_initiator_name(initiator
));
1025 if (reg_request_cell_base(last_request
))
1026 return reg_dev_ignore_cell_hint(wiphy
);
1031 static void handle_reg_beacon(struct wiphy
*wiphy
,
1032 unsigned int chan_idx
,
1033 struct reg_beacon
*reg_beacon
)
1035 struct ieee80211_supported_band
*sband
;
1036 struct ieee80211_channel
*chan
;
1037 bool channel_changed
= false;
1038 struct ieee80211_channel chan_before
;
1040 assert_cfg80211_lock();
1042 sband
= wiphy
->bands
[reg_beacon
->chan
.band
];
1043 chan
= &sband
->channels
[chan_idx
];
1045 if (likely(chan
->center_freq
!= reg_beacon
->chan
.center_freq
))
1048 if (chan
->beacon_found
)
1051 chan
->beacon_found
= true;
1053 if (wiphy
->flags
& WIPHY_FLAG_DISABLE_BEACON_HINTS
)
1056 chan_before
.center_freq
= chan
->center_freq
;
1057 chan_before
.flags
= chan
->flags
;
1059 if (chan
->flags
& IEEE80211_CHAN_PASSIVE_SCAN
) {
1060 chan
->flags
&= ~IEEE80211_CHAN_PASSIVE_SCAN
;
1061 channel_changed
= true;
1064 if (chan
->flags
& IEEE80211_CHAN_NO_IBSS
) {
1065 chan
->flags
&= ~IEEE80211_CHAN_NO_IBSS
;
1066 channel_changed
= true;
1069 if (channel_changed
)
1070 nl80211_send_beacon_hint_event(wiphy
, &chan_before
, chan
);
1074 * Called when a scan on a wiphy finds a beacon on
1077 static void wiphy_update_new_beacon(struct wiphy
*wiphy
,
1078 struct reg_beacon
*reg_beacon
)
1081 struct ieee80211_supported_band
*sband
;
1083 assert_cfg80211_lock();
1085 if (!wiphy
->bands
[reg_beacon
->chan
.band
])
1088 sband
= wiphy
->bands
[reg_beacon
->chan
.band
];
1090 for (i
= 0; i
< sband
->n_channels
; i
++)
1091 handle_reg_beacon(wiphy
, i
, reg_beacon
);
1095 * Called upon reg changes or a new wiphy is added
1097 static void wiphy_update_beacon_reg(struct wiphy
*wiphy
)
1100 struct ieee80211_supported_band
*sband
;
1101 struct reg_beacon
*reg_beacon
;
1103 assert_cfg80211_lock();
1105 if (list_empty(®_beacon_list
))
1108 list_for_each_entry(reg_beacon
, ®_beacon_list
, list
) {
1109 if (!wiphy
->bands
[reg_beacon
->chan
.band
])
1111 sband
= wiphy
->bands
[reg_beacon
->chan
.band
];
1112 for (i
= 0; i
< sband
->n_channels
; i
++)
1113 handle_reg_beacon(wiphy
, i
, reg_beacon
);
1117 static bool reg_is_world_roaming(struct wiphy
*wiphy
)
1119 if (is_world_regdom(cfg80211_regdomain
->alpha2
) ||
1120 (wiphy
->regd
&& is_world_regdom(wiphy
->regd
->alpha2
)))
1123 last_request
->initiator
!= NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
1124 wiphy
->flags
& WIPHY_FLAG_CUSTOM_REGULATORY
)
1129 /* Reap the advantages of previously found beacons */
1130 static void reg_process_beacons(struct wiphy
*wiphy
)
1133 * Means we are just firing up cfg80211, so no beacons would
1134 * have been processed yet.
1138 if (!reg_is_world_roaming(wiphy
))
1140 wiphy_update_beacon_reg(wiphy
);
1143 static bool is_ht40_not_allowed(struct ieee80211_channel
*chan
)
1147 if (chan
->flags
& IEEE80211_CHAN_DISABLED
)
1149 /* This would happen when regulatory rules disallow HT40 completely */
1150 if (IEEE80211_CHAN_NO_HT40
== (chan
->flags
& (IEEE80211_CHAN_NO_HT40
)))
1155 static void reg_process_ht_flags_channel(struct wiphy
*wiphy
,
1156 enum ieee80211_band band
,
1157 unsigned int chan_idx
)
1159 struct ieee80211_supported_band
*sband
;
1160 struct ieee80211_channel
*channel
;
1161 struct ieee80211_channel
*channel_before
= NULL
, *channel_after
= NULL
;
1164 assert_cfg80211_lock();
1166 sband
= wiphy
->bands
[band
];
1167 BUG_ON(chan_idx
>= sband
->n_channels
);
1168 channel
= &sband
->channels
[chan_idx
];
1170 if (is_ht40_not_allowed(channel
)) {
1171 channel
->flags
|= IEEE80211_CHAN_NO_HT40
;
1176 * We need to ensure the extension channels exist to
1177 * be able to use HT40- or HT40+, this finds them (or not)
1179 for (i
= 0; i
< sband
->n_channels
; i
++) {
1180 struct ieee80211_channel
*c
= &sband
->channels
[i
];
1181 if (c
->center_freq
== (channel
->center_freq
- 20))
1183 if (c
->center_freq
== (channel
->center_freq
+ 20))
1188 * Please note that this assumes target bandwidth is 20 MHz,
1189 * if that ever changes we also need to change the below logic
1190 * to include that as well.
1192 if (is_ht40_not_allowed(channel_before
))
1193 channel
->flags
|= IEEE80211_CHAN_NO_HT40MINUS
;
1195 channel
->flags
&= ~IEEE80211_CHAN_NO_HT40MINUS
;
1197 if (is_ht40_not_allowed(channel_after
))
1198 channel
->flags
|= IEEE80211_CHAN_NO_HT40PLUS
;
1200 channel
->flags
&= ~IEEE80211_CHAN_NO_HT40PLUS
;
1203 static void reg_process_ht_flags_band(struct wiphy
*wiphy
,
1204 enum ieee80211_band band
)
1207 struct ieee80211_supported_band
*sband
;
1209 BUG_ON(!wiphy
->bands
[band
]);
1210 sband
= wiphy
->bands
[band
];
1212 for (i
= 0; i
< sband
->n_channels
; i
++)
1213 reg_process_ht_flags_channel(wiphy
, band
, i
);
1216 static void reg_process_ht_flags(struct wiphy
*wiphy
)
1218 enum ieee80211_band band
;
1223 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++) {
1224 if (wiphy
->bands
[band
])
1225 reg_process_ht_flags_band(wiphy
, band
);
1230 static void wiphy_update_regulatory(struct wiphy
*wiphy
,
1231 enum nl80211_reg_initiator initiator
)
1233 enum ieee80211_band band
;
1237 if (ignore_reg_update(wiphy
, initiator
))
1240 last_request
->dfs_region
= cfg80211_regdomain
->dfs_region
;
1242 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++) {
1243 if (wiphy
->bands
[band
])
1244 handle_band(wiphy
, band
, initiator
);
1247 reg_process_beacons(wiphy
);
1248 reg_process_ht_flags(wiphy
);
1249 if (wiphy
->reg_notifier
)
1250 wiphy
->reg_notifier(wiphy
, last_request
);
1253 static void update_all_wiphy_regulatory(enum nl80211_reg_initiator initiator
)
1255 struct cfg80211_registered_device
*rdev
;
1256 struct wiphy
*wiphy
;
1258 list_for_each_entry(rdev
, &cfg80211_rdev_list
, list
) {
1259 wiphy
= &rdev
->wiphy
;
1260 wiphy_update_regulatory(wiphy
, initiator
);
1262 * Regulatory updates set by CORE are ignored for custom
1263 * regulatory cards. Let us notify the changes to the driver,
1264 * as some drivers used this to restore its orig_* reg domain.
1266 if (initiator
== NL80211_REGDOM_SET_BY_CORE
&&
1267 wiphy
->flags
& WIPHY_FLAG_CUSTOM_REGULATORY
&&
1268 wiphy
->reg_notifier
)
1269 wiphy
->reg_notifier(wiphy
, last_request
);
1273 static void handle_channel_custom(struct wiphy
*wiphy
,
1274 enum ieee80211_band band
,
1275 unsigned int chan_idx
,
1276 const struct ieee80211_regdomain
*regd
)
1279 u32 desired_bw_khz
= MHZ_TO_KHZ(20);
1281 const struct ieee80211_reg_rule
*reg_rule
= NULL
;
1282 const struct ieee80211_power_rule
*power_rule
= NULL
;
1283 const struct ieee80211_freq_range
*freq_range
= NULL
;
1284 struct ieee80211_supported_band
*sband
;
1285 struct ieee80211_channel
*chan
;
1289 sband
= wiphy
->bands
[band
];
1290 BUG_ON(chan_idx
>= sband
->n_channels
);
1291 chan
= &sband
->channels
[chan_idx
];
1293 r
= freq_reg_info_regd(wiphy
,
1294 MHZ_TO_KHZ(chan
->center_freq
),
1300 REG_DBG_PRINT("Disabling freq %d MHz as custom "
1301 "regd has no rule that fits a %d MHz "
1304 KHZ_TO_MHZ(desired_bw_khz
));
1305 chan
->flags
= IEEE80211_CHAN_DISABLED
;
1309 chan_reg_rule_print_dbg(chan
, desired_bw_khz
, reg_rule
);
1311 power_rule
= ®_rule
->power_rule
;
1312 freq_range
= ®_rule
->freq_range
;
1314 if (freq_range
->max_bandwidth_khz
< MHZ_TO_KHZ(40))
1315 bw_flags
= IEEE80211_CHAN_NO_HT40
;
1317 chan
->flags
|= map_regdom_flags(reg_rule
->flags
) | bw_flags
;
1318 chan
->max_antenna_gain
= (int) MBI_TO_DBI(power_rule
->max_antenna_gain
);
1319 chan
->max_power
= (int) MBM_TO_DBM(power_rule
->max_eirp
);
1322 static void handle_band_custom(struct wiphy
*wiphy
, enum ieee80211_band band
,
1323 const struct ieee80211_regdomain
*regd
)
1326 struct ieee80211_supported_band
*sband
;
1328 BUG_ON(!wiphy
->bands
[band
]);
1329 sband
= wiphy
->bands
[band
];
1331 for (i
= 0; i
< sband
->n_channels
; i
++)
1332 handle_channel_custom(wiphy
, band
, i
, regd
);
1335 /* Used by drivers prior to wiphy registration */
1336 void wiphy_apply_custom_regulatory(struct wiphy
*wiphy
,
1337 const struct ieee80211_regdomain
*regd
)
1339 enum ieee80211_band band
;
1340 unsigned int bands_set
= 0;
1342 mutex_lock(®_mutex
);
1343 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++) {
1344 if (!wiphy
->bands
[band
])
1346 handle_band_custom(wiphy
, band
, regd
);
1349 mutex_unlock(®_mutex
);
1352 * no point in calling this if it won't have any effect
1353 * on your device's supportd bands.
1355 WARN_ON(!bands_set
);
1357 EXPORT_SYMBOL(wiphy_apply_custom_regulatory
);
1360 * Return value which can be used by ignore_request() to indicate
1361 * it has been determined we should intersect two regulatory domains
1363 #define REG_INTERSECT 1
1365 /* This has the logic which determines when a new request
1366 * should be ignored. */
1367 static int ignore_request(struct wiphy
*wiphy
,
1368 struct regulatory_request
*pending_request
)
1370 struct wiphy
*last_wiphy
= NULL
;
1372 assert_cfg80211_lock();
1374 /* All initial requests are respected */
1378 switch (pending_request
->initiator
) {
1379 case NL80211_REGDOM_SET_BY_CORE
:
1381 case NL80211_REGDOM_SET_BY_COUNTRY_IE
:
1383 if (reg_request_cell_base(last_request
)) {
1384 /* Trust a Cell base station over the AP's country IE */
1385 if (regdom_changes(pending_request
->alpha2
))
1390 last_wiphy
= wiphy_idx_to_wiphy(last_request
->wiphy_idx
);
1392 if (unlikely(!is_an_alpha2(pending_request
->alpha2
)))
1394 if (last_request
->initiator
==
1395 NL80211_REGDOM_SET_BY_COUNTRY_IE
) {
1396 if (last_wiphy
!= wiphy
) {
1398 * Two cards with two APs claiming different
1399 * Country IE alpha2s. We could
1400 * intersect them, but that seems unlikely
1401 * to be correct. Reject second one for now.
1403 if (regdom_changes(pending_request
->alpha2
))
1408 * Two consecutive Country IE hints on the same wiphy.
1409 * This should be picked up early by the driver/stack
1411 if (WARN_ON(regdom_changes(pending_request
->alpha2
)))
1416 case NL80211_REGDOM_SET_BY_DRIVER
:
1417 if (last_request
->initiator
== NL80211_REGDOM_SET_BY_CORE
) {
1418 if (regdom_changes(pending_request
->alpha2
))
1424 * This would happen if you unplug and plug your card
1425 * back in or if you add a new device for which the previously
1426 * loaded card also agrees on the regulatory domain.
1428 if (last_request
->initiator
== NL80211_REGDOM_SET_BY_DRIVER
&&
1429 !regdom_changes(pending_request
->alpha2
))
1432 return REG_INTERSECT
;
1433 case NL80211_REGDOM_SET_BY_USER
:
1434 if (reg_request_cell_base(pending_request
))
1435 return reg_ignore_cell_hint(pending_request
);
1437 if (reg_request_cell_base(last_request
))
1440 if (last_request
->initiator
== NL80211_REGDOM_SET_BY_COUNTRY_IE
)
1441 return REG_INTERSECT
;
1443 * If the user knows better the user should set the regdom
1444 * to their country before the IE is picked up
1446 if (last_request
->initiator
== NL80211_REGDOM_SET_BY_USER
&&
1447 last_request
->intersect
)
1450 * Process user requests only after previous user/driver/core
1451 * requests have been processed
1453 if (last_request
->initiator
== NL80211_REGDOM_SET_BY_CORE
||
1454 last_request
->initiator
== NL80211_REGDOM_SET_BY_DRIVER
||
1455 last_request
->initiator
== NL80211_REGDOM_SET_BY_USER
) {
1456 if (regdom_changes(last_request
->alpha2
))
1460 if (!regdom_changes(pending_request
->alpha2
))
1469 static void reg_set_request_processed(void)
1471 bool need_more_processing
= false;
1473 last_request
->processed
= true;
1475 spin_lock(®_requests_lock
);
1476 if (!list_empty(®_requests_list
))
1477 need_more_processing
= true;
1478 spin_unlock(®_requests_lock
);
1480 if (last_request
->initiator
== NL80211_REGDOM_SET_BY_USER
)
1481 cancel_delayed_work(®_timeout
);
1483 if (need_more_processing
)
1484 schedule_work(®_work
);
1488 * __regulatory_hint - hint to the wireless core a regulatory domain
1489 * @wiphy: if the hint comes from country information from an AP, this
1490 * is required to be set to the wiphy that received the information
1491 * @pending_request: the regulatory request currently being processed
1493 * The Wireless subsystem can use this function to hint to the wireless core
1494 * what it believes should be the current regulatory domain.
1496 * Returns zero if all went fine, %-EALREADY if a regulatory domain had
1497 * already been set or other standard error codes.
1499 * Caller must hold &cfg80211_mutex and ®_mutex
1501 static int __regulatory_hint(struct wiphy
*wiphy
,
1502 struct regulatory_request
*pending_request
)
1504 bool intersect
= false;
1507 assert_cfg80211_lock();
1509 r
= ignore_request(wiphy
, pending_request
);
1511 if (r
== REG_INTERSECT
) {
1512 if (pending_request
->initiator
==
1513 NL80211_REGDOM_SET_BY_DRIVER
) {
1514 r
= reg_copy_regd(&wiphy
->regd
, cfg80211_regdomain
);
1516 kfree(pending_request
);
1523 * If the regulatory domain being requested by the
1524 * driver has already been set just copy it to the
1527 if (r
== -EALREADY
&&
1528 pending_request
->initiator
==
1529 NL80211_REGDOM_SET_BY_DRIVER
) {
1530 r
= reg_copy_regd(&wiphy
->regd
, cfg80211_regdomain
);
1532 kfree(pending_request
);
1538 kfree(pending_request
);
1543 if (last_request
!= &core_request_world
)
1544 kfree(last_request
);
1546 last_request
= pending_request
;
1547 last_request
->intersect
= intersect
;
1549 pending_request
= NULL
;
1551 if (last_request
->initiator
== NL80211_REGDOM_SET_BY_USER
) {
1552 user_alpha2
[0] = last_request
->alpha2
[0];
1553 user_alpha2
[1] = last_request
->alpha2
[1];
1556 /* When r == REG_INTERSECT we do need to call CRDA */
1559 * Since CRDA will not be called in this case as we already
1560 * have applied the requested regulatory domain before we just
1561 * inform userspace we have processed the request
1563 if (r
== -EALREADY
) {
1564 nl80211_send_reg_change_event(last_request
);
1565 reg_set_request_processed();
1570 return call_crda(last_request
->alpha2
);
1573 /* This processes *all* regulatory hints */
1574 static void reg_process_hint(struct regulatory_request
*reg_request
,
1575 enum nl80211_reg_initiator reg_initiator
)
1578 struct wiphy
*wiphy
= NULL
;
1580 BUG_ON(!reg_request
->alpha2
);
1582 if (wiphy_idx_valid(reg_request
->wiphy_idx
))
1583 wiphy
= wiphy_idx_to_wiphy(reg_request
->wiphy_idx
);
1585 if (reg_initiator
== NL80211_REGDOM_SET_BY_DRIVER
&&
1591 r
= __regulatory_hint(wiphy
, reg_request
);
1592 /* This is required so that the orig_* parameters are saved */
1593 if (r
== -EALREADY
&& wiphy
&&
1594 wiphy
->flags
& WIPHY_FLAG_STRICT_REGULATORY
) {
1595 wiphy_update_regulatory(wiphy
, reg_initiator
);
1600 * We only time out user hints, given that they should be the only
1601 * source of bogus requests.
1603 if (r
!= -EALREADY
&&
1604 reg_initiator
== NL80211_REGDOM_SET_BY_USER
)
1605 schedule_delayed_work(®_timeout
, msecs_to_jiffies(3142));
1609 * Processes regulatory hints, this is all the NL80211_REGDOM_SET_BY_*
1610 * Regulatory hints come on a first come first serve basis and we
1611 * must process each one atomically.
1613 static void reg_process_pending_hints(void)
1615 struct regulatory_request
*reg_request
;
1617 mutex_lock(&cfg80211_mutex
);
1618 mutex_lock(®_mutex
);
1620 /* When last_request->processed becomes true this will be rescheduled */
1621 if (last_request
&& !last_request
->processed
) {
1622 REG_DBG_PRINT("Pending regulatory request, waiting "
1623 "for it to be processed...\n");
1627 spin_lock(®_requests_lock
);
1629 if (list_empty(®_requests_list
)) {
1630 spin_unlock(®_requests_lock
);
1634 reg_request
= list_first_entry(®_requests_list
,
1635 struct regulatory_request
,
1637 list_del_init(®_request
->list
);
1639 spin_unlock(®_requests_lock
);
1641 reg_process_hint(reg_request
, reg_request
->initiator
);
1644 mutex_unlock(®_mutex
);
1645 mutex_unlock(&cfg80211_mutex
);
1648 /* Processes beacon hints -- this has nothing to do with country IEs */
1649 static void reg_process_pending_beacon_hints(void)
1651 struct cfg80211_registered_device
*rdev
;
1652 struct reg_beacon
*pending_beacon
, *tmp
;
1655 * No need to hold the reg_mutex here as we just touch wiphys
1656 * and do not read or access regulatory variables.
1658 mutex_lock(&cfg80211_mutex
);
1660 /* This goes through the _pending_ beacon list */
1661 spin_lock_bh(®_pending_beacons_lock
);
1663 if (list_empty(®_pending_beacons
)) {
1664 spin_unlock_bh(®_pending_beacons_lock
);
1668 list_for_each_entry_safe(pending_beacon
, tmp
,
1669 ®_pending_beacons
, list
) {
1671 list_del_init(&pending_beacon
->list
);
1673 /* Applies the beacon hint to current wiphys */
1674 list_for_each_entry(rdev
, &cfg80211_rdev_list
, list
)
1675 wiphy_update_new_beacon(&rdev
->wiphy
, pending_beacon
);
1677 /* Remembers the beacon hint for new wiphys or reg changes */
1678 list_add_tail(&pending_beacon
->list
, ®_beacon_list
);
1681 spin_unlock_bh(®_pending_beacons_lock
);
1683 mutex_unlock(&cfg80211_mutex
);
1686 static void reg_todo(struct work_struct
*work
)
1688 reg_process_pending_hints();
1689 reg_process_pending_beacon_hints();
1692 static void queue_regulatory_request(struct regulatory_request
*request
)
1694 if (isalpha(request
->alpha2
[0]))
1695 request
->alpha2
[0] = toupper(request
->alpha2
[0]);
1696 if (isalpha(request
->alpha2
[1]))
1697 request
->alpha2
[1] = toupper(request
->alpha2
[1]);
1699 spin_lock(®_requests_lock
);
1700 list_add_tail(&request
->list
, ®_requests_list
);
1701 spin_unlock(®_requests_lock
);
1703 schedule_work(®_work
);
1707 * Core regulatory hint -- happens during cfg80211_init()
1708 * and when we restore regulatory settings.
1710 static int regulatory_hint_core(const char *alpha2
)
1712 struct regulatory_request
*request
;
1714 request
= kzalloc(sizeof(struct regulatory_request
),
1719 request
->alpha2
[0] = alpha2
[0];
1720 request
->alpha2
[1] = alpha2
[1];
1721 request
->initiator
= NL80211_REGDOM_SET_BY_CORE
;
1723 queue_regulatory_request(request
);
1729 int regulatory_hint_user(const char *alpha2
,
1730 enum nl80211_user_reg_hint_type user_reg_hint_type
)
1732 struct regulatory_request
*request
;
1736 request
= kzalloc(sizeof(struct regulatory_request
), GFP_KERNEL
);
1740 request
->wiphy_idx
= WIPHY_IDX_STALE
;
1741 request
->alpha2
[0] = alpha2
[0];
1742 request
->alpha2
[1] = alpha2
[1];
1743 request
->initiator
= NL80211_REGDOM_SET_BY_USER
;
1744 request
->user_reg_hint_type
= user_reg_hint_type
;
1746 queue_regulatory_request(request
);
1752 int regulatory_hint(struct wiphy
*wiphy
, const char *alpha2
)
1754 struct regulatory_request
*request
;
1759 request
= kzalloc(sizeof(struct regulatory_request
), GFP_KERNEL
);
1763 request
->wiphy_idx
= get_wiphy_idx(wiphy
);
1765 /* Must have registered wiphy first */
1766 BUG_ON(!wiphy_idx_valid(request
->wiphy_idx
));
1768 request
->alpha2
[0] = alpha2
[0];
1769 request
->alpha2
[1] = alpha2
[1];
1770 request
->initiator
= NL80211_REGDOM_SET_BY_DRIVER
;
1772 queue_regulatory_request(request
);
1776 EXPORT_SYMBOL(regulatory_hint
);
1779 * We hold wdev_lock() here so we cannot hold cfg80211_mutex() and
1780 * therefore cannot iterate over the rdev list here.
1782 void regulatory_hint_11d(struct wiphy
*wiphy
,
1783 enum ieee80211_band band
,
1788 enum environment_cap env
= ENVIRON_ANY
;
1789 struct regulatory_request
*request
;
1791 mutex_lock(®_mutex
);
1793 if (unlikely(!last_request
))
1796 /* IE len must be evenly divisible by 2 */
1797 if (country_ie_len
& 0x01)
1800 if (country_ie_len
< IEEE80211_COUNTRY_IE_MIN_LEN
)
1803 alpha2
[0] = country_ie
[0];
1804 alpha2
[1] = country_ie
[1];
1806 if (country_ie
[2] == 'I')
1807 env
= ENVIRON_INDOOR
;
1808 else if (country_ie
[2] == 'O')
1809 env
= ENVIRON_OUTDOOR
;
1812 * We will run this only upon a successful connection on cfg80211.
1813 * We leave conflict resolution to the workqueue, where can hold
1816 if (likely(last_request
->initiator
==
1817 NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
1818 wiphy_idx_valid(last_request
->wiphy_idx
)))
1821 request
= kzalloc(sizeof(struct regulatory_request
), GFP_KERNEL
);
1825 request
->wiphy_idx
= get_wiphy_idx(wiphy
);
1826 request
->alpha2
[0] = alpha2
[0];
1827 request
->alpha2
[1] = alpha2
[1];
1828 request
->initiator
= NL80211_REGDOM_SET_BY_COUNTRY_IE
;
1829 request
->country_ie_env
= env
;
1831 mutex_unlock(®_mutex
);
1833 queue_regulatory_request(request
);
1838 mutex_unlock(®_mutex
);
1841 static void restore_alpha2(char *alpha2
, bool reset_user
)
1843 /* indicates there is no alpha2 to consider for restoration */
1847 /* The user setting has precedence over the module parameter */
1848 if (is_user_regdom_saved()) {
1849 /* Unless we're asked to ignore it and reset it */
1851 REG_DBG_PRINT("Restoring regulatory settings "
1852 "including user preference\n");
1853 user_alpha2
[0] = '9';
1854 user_alpha2
[1] = '7';
1857 * If we're ignoring user settings, we still need to
1858 * check the module parameter to ensure we put things
1859 * back as they were for a full restore.
1861 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];
1870 REG_DBG_PRINT("Restoring regulatory settings "
1871 "while preserving user preference for: %c%c\n",
1874 alpha2
[0] = user_alpha2
[0];
1875 alpha2
[1] = user_alpha2
[1];
1877 } else if (!is_world_regdom(ieee80211_regdom
)) {
1878 REG_DBG_PRINT("Keeping preference on "
1879 "module parameter ieee80211_regdom: %c%c\n",
1880 ieee80211_regdom
[0],
1881 ieee80211_regdom
[1]);
1882 alpha2
[0] = ieee80211_regdom
[0];
1883 alpha2
[1] = ieee80211_regdom
[1];
1885 REG_DBG_PRINT("Restoring regulatory settings\n");
1888 static void restore_custom_reg_settings(struct wiphy
*wiphy
)
1890 struct ieee80211_supported_band
*sband
;
1891 enum ieee80211_band band
;
1892 struct ieee80211_channel
*chan
;
1895 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++) {
1896 sband
= wiphy
->bands
[band
];
1899 for (i
= 0; i
< sband
->n_channels
; i
++) {
1900 chan
= &sband
->channels
[i
];
1901 chan
->flags
= chan
->orig_flags
;
1902 chan
->max_antenna_gain
= chan
->orig_mag
;
1903 chan
->max_power
= chan
->orig_mpwr
;
1904 chan
->beacon_found
= false;
1910 * Restoring regulatory settings involves ingoring any
1911 * possibly stale country IE information and user regulatory
1912 * settings if so desired, this includes any beacon hints
1913 * learned as we could have traveled outside to another country
1914 * after disconnection. To restore regulatory settings we do
1915 * exactly what we did at bootup:
1917 * - send a core regulatory hint
1918 * - send a user regulatory hint if applicable
1920 * Device drivers that send a regulatory hint for a specific country
1921 * keep their own regulatory domain on wiphy->regd so that does does
1922 * not need to be remembered.
1924 static void restore_regulatory_settings(bool reset_user
)
1927 char world_alpha2
[2];
1928 struct reg_beacon
*reg_beacon
, *btmp
;
1929 struct regulatory_request
*reg_request
, *tmp
;
1930 LIST_HEAD(tmp_reg_req_list
);
1931 struct cfg80211_registered_device
*rdev
;
1933 mutex_lock(&cfg80211_mutex
);
1934 mutex_lock(®_mutex
);
1936 reset_regdomains(true);
1937 restore_alpha2(alpha2
, reset_user
);
1940 * If there's any pending requests we simply
1941 * stash them to a temporary pending queue and
1942 * add then after we've restored regulatory
1945 spin_lock(®_requests_lock
);
1946 if (!list_empty(®_requests_list
)) {
1947 list_for_each_entry_safe(reg_request
, tmp
,
1948 ®_requests_list
, list
) {
1949 if (reg_request
->initiator
!=
1950 NL80211_REGDOM_SET_BY_USER
)
1952 list_del(®_request
->list
);
1953 list_add_tail(®_request
->list
, &tmp_reg_req_list
);
1956 spin_unlock(®_requests_lock
);
1958 /* Clear beacon hints */
1959 spin_lock_bh(®_pending_beacons_lock
);
1960 if (!list_empty(®_pending_beacons
)) {
1961 list_for_each_entry_safe(reg_beacon
, btmp
,
1962 ®_pending_beacons
, list
) {
1963 list_del(®_beacon
->list
);
1967 spin_unlock_bh(®_pending_beacons_lock
);
1969 if (!list_empty(®_beacon_list
)) {
1970 list_for_each_entry_safe(reg_beacon
, btmp
,
1971 ®_beacon_list
, list
) {
1972 list_del(®_beacon
->list
);
1977 /* First restore to the basic regulatory settings */
1978 cfg80211_regdomain
= cfg80211_world_regdom
;
1979 world_alpha2
[0] = cfg80211_regdomain
->alpha2
[0];
1980 world_alpha2
[1] = cfg80211_regdomain
->alpha2
[1];
1982 list_for_each_entry(rdev
, &cfg80211_rdev_list
, list
) {
1983 if (rdev
->wiphy
.flags
& WIPHY_FLAG_CUSTOM_REGULATORY
)
1984 restore_custom_reg_settings(&rdev
->wiphy
);
1987 mutex_unlock(®_mutex
);
1988 mutex_unlock(&cfg80211_mutex
);
1990 regulatory_hint_core(world_alpha2
);
1993 * This restores the ieee80211_regdom module parameter
1994 * preference or the last user requested regulatory
1995 * settings, user regulatory settings takes precedence.
1997 if (is_an_alpha2(alpha2
))
1998 regulatory_hint_user(user_alpha2
, NL80211_USER_REG_HINT_USER
);
2000 if (list_empty(&tmp_reg_req_list
))
2003 mutex_lock(&cfg80211_mutex
);
2004 mutex_lock(®_mutex
);
2006 spin_lock(®_requests_lock
);
2007 list_for_each_entry_safe(reg_request
, tmp
, &tmp_reg_req_list
, list
) {
2008 REG_DBG_PRINT("Adding request for country %c%c back "
2010 reg_request
->alpha2
[0],
2011 reg_request
->alpha2
[1]);
2012 list_del(®_request
->list
);
2013 list_add_tail(®_request
->list
, ®_requests_list
);
2015 spin_unlock(®_requests_lock
);
2017 mutex_unlock(®_mutex
);
2018 mutex_unlock(&cfg80211_mutex
);
2020 REG_DBG_PRINT("Kicking the queue\n");
2022 schedule_work(®_work
);
2025 void regulatory_hint_disconnect(void)
2027 REG_DBG_PRINT("All devices are disconnected, going to "
2028 "restore regulatory settings\n");
2029 restore_regulatory_settings(false);
2032 static bool freq_is_chan_12_13_14(u16 freq
)
2034 if (freq
== ieee80211_channel_to_frequency(12, IEEE80211_BAND_2GHZ
) ||
2035 freq
== ieee80211_channel_to_frequency(13, IEEE80211_BAND_2GHZ
) ||
2036 freq
== ieee80211_channel_to_frequency(14, IEEE80211_BAND_2GHZ
))
2041 int regulatory_hint_found_beacon(struct wiphy
*wiphy
,
2042 struct ieee80211_channel
*beacon_chan
,
2045 struct reg_beacon
*reg_beacon
;
2047 if (likely((beacon_chan
->beacon_found
||
2048 (beacon_chan
->flags
& IEEE80211_CHAN_RADAR
) ||
2049 (beacon_chan
->band
== IEEE80211_BAND_2GHZ
&&
2050 !freq_is_chan_12_13_14(beacon_chan
->center_freq
)))))
2053 reg_beacon
= kzalloc(sizeof(struct reg_beacon
), gfp
);
2057 REG_DBG_PRINT("Found new beacon on "
2058 "frequency: %d MHz (Ch %d) on %s\n",
2059 beacon_chan
->center_freq
,
2060 ieee80211_frequency_to_channel(beacon_chan
->center_freq
),
2063 memcpy(®_beacon
->chan
, beacon_chan
,
2064 sizeof(struct ieee80211_channel
));
2068 * Since we can be called from BH or and non-BH context
2069 * we must use spin_lock_bh()
2071 spin_lock_bh(®_pending_beacons_lock
);
2072 list_add_tail(®_beacon
->list
, ®_pending_beacons
);
2073 spin_unlock_bh(®_pending_beacons_lock
);
2075 schedule_work(®_work
);
2080 static void print_rd_rules(const struct ieee80211_regdomain
*rd
)
2083 const struct ieee80211_reg_rule
*reg_rule
= NULL
;
2084 const struct ieee80211_freq_range
*freq_range
= NULL
;
2085 const struct ieee80211_power_rule
*power_rule
= NULL
;
2087 pr_info(" (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)\n");
2089 for (i
= 0; i
< rd
->n_reg_rules
; i
++) {
2090 reg_rule
= &rd
->reg_rules
[i
];
2091 freq_range
= ®_rule
->freq_range
;
2092 power_rule
= ®_rule
->power_rule
;
2095 * There may not be documentation for max antenna gain
2096 * in certain regions
2098 if (power_rule
->max_antenna_gain
)
2099 pr_info(" (%d KHz - %d KHz @ %d KHz), (%d mBi, %d mBm)\n",
2100 freq_range
->start_freq_khz
,
2101 freq_range
->end_freq_khz
,
2102 freq_range
->max_bandwidth_khz
,
2103 power_rule
->max_antenna_gain
,
2104 power_rule
->max_eirp
);
2106 pr_info(" (%d KHz - %d KHz @ %d KHz), (N/A, %d mBm)\n",
2107 freq_range
->start_freq_khz
,
2108 freq_range
->end_freq_khz
,
2109 freq_range
->max_bandwidth_khz
,
2110 power_rule
->max_eirp
);
2114 bool reg_supported_dfs_region(u8 dfs_region
)
2116 switch (dfs_region
) {
2117 case NL80211_DFS_UNSET
:
2118 case NL80211_DFS_FCC
:
2119 case NL80211_DFS_ETSI
:
2120 case NL80211_DFS_JP
:
2123 REG_DBG_PRINT("Ignoring uknown DFS master region: %d\n",
2129 static void print_dfs_region(u8 dfs_region
)
2134 switch (dfs_region
) {
2135 case NL80211_DFS_FCC
:
2136 pr_info(" DFS Master region FCC");
2138 case NL80211_DFS_ETSI
:
2139 pr_info(" DFS Master region ETSI");
2141 case NL80211_DFS_JP
:
2142 pr_info(" DFS Master region JP");
2145 pr_info(" DFS Master region Uknown");
2150 static void print_regdomain(const struct ieee80211_regdomain
*rd
)
2153 if (is_intersected_alpha2(rd
->alpha2
)) {
2155 if (last_request
->initiator
==
2156 NL80211_REGDOM_SET_BY_COUNTRY_IE
) {
2157 struct cfg80211_registered_device
*rdev
;
2158 rdev
= cfg80211_rdev_by_wiphy_idx(
2159 last_request
->wiphy_idx
);
2161 pr_info("Current regulatory domain updated by AP to: %c%c\n",
2162 rdev
->country_ie_alpha2
[0],
2163 rdev
->country_ie_alpha2
[1]);
2165 pr_info("Current regulatory domain intersected:\n");
2167 pr_info("Current regulatory domain intersected:\n");
2168 } else if (is_world_regdom(rd
->alpha2
))
2169 pr_info("World regulatory domain updated:\n");
2171 if (is_unknown_alpha2(rd
->alpha2
))
2172 pr_info("Regulatory domain changed to driver built-in settings (unknown country)\n");
2174 if (reg_request_cell_base(last_request
))
2175 pr_info("Regulatory domain changed "
2176 "to country: %c%c by Cell Station\n",
2177 rd
->alpha2
[0], rd
->alpha2
[1]);
2179 pr_info("Regulatory domain changed "
2180 "to country: %c%c\n",
2181 rd
->alpha2
[0], rd
->alpha2
[1]);
2184 print_dfs_region(rd
->dfs_region
);
2188 static void print_regdomain_info(const struct ieee80211_regdomain
*rd
)
2190 pr_info("Regulatory domain: %c%c\n", rd
->alpha2
[0], rd
->alpha2
[1]);
2194 /* Takes ownership of rd only if it doesn't fail */
2195 static int __set_regdom(const struct ieee80211_regdomain
*rd
)
2197 const struct ieee80211_regdomain
*intersected_rd
= NULL
;
2198 struct cfg80211_registered_device
*rdev
= NULL
;
2199 struct wiphy
*request_wiphy
;
2200 /* Some basic sanity checks first */
2202 if (is_world_regdom(rd
->alpha2
)) {
2203 if (WARN_ON(!reg_is_valid_request(rd
->alpha2
)))
2205 update_world_regdomain(rd
);
2209 if (!is_alpha2_set(rd
->alpha2
) && !is_an_alpha2(rd
->alpha2
) &&
2210 !is_unknown_alpha2(rd
->alpha2
))
2217 * Lets only bother proceeding on the same alpha2 if the current
2218 * rd is non static (it means CRDA was present and was used last)
2219 * and the pending request came in from a country IE
2221 if (last_request
->initiator
!= NL80211_REGDOM_SET_BY_COUNTRY_IE
) {
2223 * If someone else asked us to change the rd lets only bother
2224 * checking if the alpha2 changes if CRDA was already called
2226 if (!regdom_changes(rd
->alpha2
))
2231 * Now lets set the regulatory domain, update all driver channels
2232 * and finally inform them of what we have done, in case they want
2233 * to review or adjust their own settings based on their own
2234 * internal EEPROM data
2237 if (WARN_ON(!reg_is_valid_request(rd
->alpha2
)))
2240 if (!is_valid_rd(rd
)) {
2241 pr_err("Invalid regulatory domain detected:\n");
2242 print_regdomain_info(rd
);
2246 request_wiphy
= wiphy_idx_to_wiphy(last_request
->wiphy_idx
);
2247 if (!request_wiphy
&&
2248 (last_request
->initiator
== NL80211_REGDOM_SET_BY_DRIVER
||
2249 last_request
->initiator
== NL80211_REGDOM_SET_BY_COUNTRY_IE
)) {
2250 schedule_delayed_work(®_timeout
, 0);
2254 if (!last_request
->intersect
) {
2257 if (last_request
->initiator
!= NL80211_REGDOM_SET_BY_DRIVER
) {
2258 reset_regdomains(false);
2259 cfg80211_regdomain
= rd
;
2264 * For a driver hint, lets copy the regulatory domain the
2265 * driver wanted to the wiphy to deal with conflicts
2269 * Userspace could have sent two replies with only
2270 * one kernel request.
2272 if (request_wiphy
->regd
)
2275 r
= reg_copy_regd(&request_wiphy
->regd
, rd
);
2279 reset_regdomains(false);
2280 cfg80211_regdomain
= rd
;
2284 /* Intersection requires a bit more work */
2286 if (last_request
->initiator
!= NL80211_REGDOM_SET_BY_COUNTRY_IE
) {
2288 intersected_rd
= regdom_intersect(rd
, cfg80211_regdomain
);
2289 if (!intersected_rd
)
2293 * We can trash what CRDA provided now.
2294 * However if a driver requested this specific regulatory
2295 * domain we keep it for its private use
2297 if (last_request
->initiator
== NL80211_REGDOM_SET_BY_DRIVER
)
2298 request_wiphy
->regd
= rd
;
2304 reset_regdomains(false);
2305 cfg80211_regdomain
= intersected_rd
;
2310 if (!intersected_rd
)
2313 rdev
= wiphy_to_dev(request_wiphy
);
2315 rdev
->country_ie_alpha2
[0] = rd
->alpha2
[0];
2316 rdev
->country_ie_alpha2
[1] = rd
->alpha2
[1];
2317 rdev
->env
= last_request
->country_ie_env
;
2319 BUG_ON(intersected_rd
== rd
);
2324 reset_regdomains(false);
2325 cfg80211_regdomain
= intersected_rd
;
2332 * Use this call to set the current regulatory domain. Conflicts with
2333 * multiple drivers can be ironed out later. Caller must've already
2334 * kmalloc'd the rd structure. Caller must hold cfg80211_mutex
2336 int set_regdom(const struct ieee80211_regdomain
*rd
)
2340 assert_cfg80211_lock();
2342 mutex_lock(®_mutex
);
2344 /* Note that this doesn't update the wiphys, this is done below */
2345 r
= __set_regdom(rd
);
2348 reg_set_request_processed();
2351 mutex_unlock(®_mutex
);
2355 /* This would make this whole thing pointless */
2356 if (!last_request
->intersect
)
2357 BUG_ON(rd
!= cfg80211_regdomain
);
2359 /* update all wiphys now with the new established regulatory domain */
2360 update_all_wiphy_regulatory(last_request
->initiator
);
2362 print_regdomain(cfg80211_regdomain
);
2364 nl80211_send_reg_change_event(last_request
);
2366 reg_set_request_processed();
2368 mutex_unlock(®_mutex
);
2373 #ifdef CONFIG_HOTPLUG
2374 int reg_device_uevent(struct device
*dev
, struct kobj_uevent_env
*env
)
2376 if (last_request
&& !last_request
->processed
) {
2377 if (add_uevent_var(env
, "COUNTRY=%c%c",
2378 last_request
->alpha2
[0],
2379 last_request
->alpha2
[1]))
2386 int reg_device_uevent(struct device
*dev
, struct kobj_uevent_env
*env
)
2390 #endif /* CONFIG_HOTPLUG */
2392 void wiphy_regulatory_register(struct wiphy
*wiphy
)
2394 assert_cfg80211_lock();
2396 mutex_lock(®_mutex
);
2398 if (!reg_dev_ignore_cell_hint(wiphy
))
2399 reg_num_devs_support_basehint
++;
2401 wiphy_update_regulatory(wiphy
, NL80211_REGDOM_SET_BY_CORE
);
2403 mutex_unlock(®_mutex
);
2406 /* Caller must hold cfg80211_mutex */
2407 void wiphy_regulatory_deregister(struct wiphy
*wiphy
)
2409 struct wiphy
*request_wiphy
= NULL
;
2411 assert_cfg80211_lock();
2413 mutex_lock(®_mutex
);
2415 if (!reg_dev_ignore_cell_hint(wiphy
))
2416 reg_num_devs_support_basehint
--;
2421 request_wiphy
= wiphy_idx_to_wiphy(last_request
->wiphy_idx
);
2423 if (!request_wiphy
|| request_wiphy
!= wiphy
)
2426 last_request
->wiphy_idx
= WIPHY_IDX_STALE
;
2427 last_request
->country_ie_env
= ENVIRON_ANY
;
2429 mutex_unlock(®_mutex
);
2432 static void reg_timeout_work(struct work_struct
*work
)
2434 REG_DBG_PRINT("Timeout while waiting for CRDA to reply, "
2435 "restoring regulatory settings\n");
2436 restore_regulatory_settings(true);
2439 int __init
regulatory_init(void)
2443 reg_pdev
= platform_device_register_simple("regulatory", 0, NULL
, 0);
2444 if (IS_ERR(reg_pdev
))
2445 return PTR_ERR(reg_pdev
);
2447 reg_pdev
->dev
.type
= ®_device_type
;
2449 spin_lock_init(®_requests_lock
);
2450 spin_lock_init(®_pending_beacons_lock
);
2452 reg_regdb_size_check();
2454 cfg80211_regdomain
= cfg80211_world_regdom
;
2456 user_alpha2
[0] = '9';
2457 user_alpha2
[1] = '7';
2459 /* We always try to get an update for the static regdomain */
2460 err
= regulatory_hint_core(cfg80211_regdomain
->alpha2
);
2465 * N.B. kobject_uevent_env() can fail mainly for when we're out
2466 * memory which is handled and propagated appropriately above
2467 * but it can also fail during a netlink_broadcast() or during
2468 * early boot for call_usermodehelper(). For now treat these
2469 * errors as non-fatal.
2471 pr_err("kobject_uevent_env() was unable to call CRDA during init\n");
2472 #ifdef CONFIG_CFG80211_REG_DEBUG
2473 /* We want to find out exactly why when debugging */
2479 * Finally, if the user set the module parameter treat it
2482 if (!is_world_regdom(ieee80211_regdom
))
2483 regulatory_hint_user(ieee80211_regdom
,
2484 NL80211_USER_REG_HINT_USER
);
2489 void /* __init_or_exit */ regulatory_exit(void)
2491 struct regulatory_request
*reg_request
, *tmp
;
2492 struct reg_beacon
*reg_beacon
, *btmp
;
2494 cancel_work_sync(®_work
);
2495 cancel_delayed_work_sync(®_timeout
);
2497 mutex_lock(&cfg80211_mutex
);
2498 mutex_lock(®_mutex
);
2500 reset_regdomains(true);
2502 dev_set_uevent_suppress(®_pdev
->dev
, true);
2504 platform_device_unregister(reg_pdev
);
2506 spin_lock_bh(®_pending_beacons_lock
);
2507 if (!list_empty(®_pending_beacons
)) {
2508 list_for_each_entry_safe(reg_beacon
, btmp
,
2509 ®_pending_beacons
, list
) {
2510 list_del(®_beacon
->list
);
2514 spin_unlock_bh(®_pending_beacons_lock
);
2516 if (!list_empty(®_beacon_list
)) {
2517 list_for_each_entry_safe(reg_beacon
, btmp
,
2518 ®_beacon_list
, list
) {
2519 list_del(®_beacon
->list
);
2524 spin_lock(®_requests_lock
);
2525 if (!list_empty(®_requests_list
)) {
2526 list_for_each_entry_safe(reg_request
, tmp
,
2527 ®_requests_list
, list
) {
2528 list_del(®_request
->list
);
2532 spin_unlock(®_requests_lock
);
2534 mutex_unlock(®_mutex
);
2535 mutex_unlock(&cfg80211_mutex
);