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/ctype.h>
52 #include <linux/nl80211.h>
53 #include <linux/platform_device.h>
54 #include <linux/moduleparam.h>
55 #include <net/cfg80211.h>
61 #ifdef CONFIG_CFG80211_REG_DEBUG
62 #define REG_DBG_PRINT(format, args...) \
63 printk(KERN_DEBUG pr_fmt(format), ##args)
65 #define REG_DBG_PRINT(args...)
68 enum reg_request_treatment
{
75 static struct regulatory_request core_request_world
= {
76 .initiator
= NL80211_REGDOM_SET_BY_CORE
,
81 .country_ie_env
= ENVIRON_ANY
,
84 /* Receipt of information from last regulatory request */
85 static struct regulatory_request
*last_request
= &core_request_world
;
87 /* To trigger userspace events */
88 static struct platform_device
*reg_pdev
;
90 static struct device_type reg_device_type
= {
91 .uevent
= reg_device_uevent
,
95 * Central wireless core regulatory domains, we only need two,
96 * the current one and a world regulatory domain in case we have no
97 * information to give us an alpha2
99 const struct ieee80211_regdomain
*cfg80211_regdomain
;
102 * Protects static reg.c components:
103 * - cfg80211_world_regdom
106 * - reg_num_devs_support_basehint
108 static DEFINE_MUTEX(reg_mutex
);
111 * Number of devices that registered to the core
112 * that support cellular base station regulatory hints
114 static int reg_num_devs_support_basehint
;
116 static inline void assert_reg_lock(void)
118 lockdep_assert_held(®_mutex
);
121 /* Used to queue up regulatory hints */
122 static LIST_HEAD(reg_requests_list
);
123 static spinlock_t reg_requests_lock
;
125 /* Used to queue up beacon hints for review */
126 static LIST_HEAD(reg_pending_beacons
);
127 static spinlock_t reg_pending_beacons_lock
;
129 /* Used to keep track of processed beacon hints */
130 static LIST_HEAD(reg_beacon_list
);
133 struct list_head list
;
134 struct ieee80211_channel chan
;
137 static void reg_todo(struct work_struct
*work
);
138 static DECLARE_WORK(reg_work
, reg_todo
);
140 static void reg_timeout_work(struct work_struct
*work
);
141 static DECLARE_DELAYED_WORK(reg_timeout
, reg_timeout_work
);
143 /* We keep a static world regulatory domain in case of the absence of CRDA */
144 static const struct ieee80211_regdomain world_regdom
= {
148 /* IEEE 802.11b/g, channels 1..11 */
149 REG_RULE(2412-10, 2462+10, 40, 6, 20, 0),
150 /* IEEE 802.11b/g, channels 12..13. */
151 REG_RULE(2467-10, 2472+10, 40, 6, 20,
152 NL80211_RRF_PASSIVE_SCAN
|
153 NL80211_RRF_NO_IBSS
),
154 /* IEEE 802.11 channel 14 - Only JP enables
155 * this and for 802.11b only */
156 REG_RULE(2484-10, 2484+10, 20, 6, 20,
157 NL80211_RRF_PASSIVE_SCAN
|
158 NL80211_RRF_NO_IBSS
|
159 NL80211_RRF_NO_OFDM
),
160 /* IEEE 802.11a, channel 36..48 */
161 REG_RULE(5180-10, 5240+10, 40, 6, 20,
162 NL80211_RRF_PASSIVE_SCAN
|
163 NL80211_RRF_NO_IBSS
),
165 /* NB: 5260 MHz - 5700 MHz requies DFS */
167 /* IEEE 802.11a, channel 149..165 */
168 REG_RULE(5745-10, 5825+10, 40, 6, 20,
169 NL80211_RRF_PASSIVE_SCAN
|
170 NL80211_RRF_NO_IBSS
),
172 /* IEEE 802.11ad (60gHz), channels 1..3 */
173 REG_RULE(56160+2160*1-1080, 56160+2160*3+1080, 2160, 0, 0, 0),
177 static const struct ieee80211_regdomain
*cfg80211_world_regdom
=
180 static char *ieee80211_regdom
= "00";
181 static char user_alpha2
[2];
183 module_param(ieee80211_regdom
, charp
, 0444);
184 MODULE_PARM_DESC(ieee80211_regdom
, "IEEE 802.11 regulatory domain code");
186 static void reset_regdomains(bool full_reset
)
188 /* avoid freeing static information or freeing something twice */
189 if (cfg80211_regdomain
== cfg80211_world_regdom
)
190 cfg80211_regdomain
= NULL
;
191 if (cfg80211_world_regdom
== &world_regdom
)
192 cfg80211_world_regdom
= NULL
;
193 if (cfg80211_regdomain
== &world_regdom
)
194 cfg80211_regdomain
= NULL
;
196 kfree(cfg80211_regdomain
);
197 kfree(cfg80211_world_regdom
);
199 cfg80211_world_regdom
= &world_regdom
;
200 cfg80211_regdomain
= NULL
;
205 if (last_request
!= &core_request_world
)
207 last_request
= &core_request_world
;
211 * Dynamic world regulatory domain requested by the wireless
212 * core upon initialization
214 static void update_world_regdomain(const struct ieee80211_regdomain
*rd
)
216 WARN_ON(!last_request
);
218 reset_regdomains(false);
220 cfg80211_world_regdom
= rd
;
221 cfg80211_regdomain
= rd
;
224 bool is_world_regdom(const char *alpha2
)
228 return alpha2
[0] == '0' && alpha2
[1] == '0';
231 static bool is_alpha2_set(const char *alpha2
)
235 return alpha2
[0] && alpha2
[1];
238 static bool is_unknown_alpha2(const char *alpha2
)
243 * Special case where regulatory domain was built by driver
244 * but a specific alpha2 cannot be determined
246 return alpha2
[0] == '9' && alpha2
[1] == '9';
249 static bool is_intersected_alpha2(const char *alpha2
)
254 * Special case where regulatory domain is the
255 * result of an intersection between two regulatory domain
258 return alpha2
[0] == '9' && alpha2
[1] == '8';
261 static bool is_an_alpha2(const char *alpha2
)
265 return isalpha(alpha2
[0]) && isalpha(alpha2
[1]);
268 static bool alpha2_equal(const char *alpha2_x
, const char *alpha2_y
)
270 if (!alpha2_x
|| !alpha2_y
)
272 return alpha2_x
[0] == alpha2_y
[0] && alpha2_x
[1] == alpha2_y
[1];
275 static bool regdom_changes(const char *alpha2
)
277 assert_cfg80211_lock();
279 if (!cfg80211_regdomain
)
281 return !alpha2_equal(cfg80211_regdomain
->alpha2
, alpha2
);
285 * The NL80211_REGDOM_SET_BY_USER regdom alpha2 is cached, this lets
286 * you know if a valid regulatory hint with NL80211_REGDOM_SET_BY_USER
287 * has ever been issued.
289 static bool is_user_regdom_saved(void)
291 if (user_alpha2
[0] == '9' && user_alpha2
[1] == '7')
294 /* This would indicate a mistake on the design */
295 if (WARN(!is_world_regdom(user_alpha2
) && !is_an_alpha2(user_alpha2
),
296 "Unexpected user alpha2: %c%c\n",
297 user_alpha2
[0], user_alpha2
[1]))
303 static const struct ieee80211_regdomain
*
304 reg_copy_regd(const struct ieee80211_regdomain
*src_regd
)
306 struct ieee80211_regdomain
*regd
;
311 sizeof(struct ieee80211_regdomain
) +
312 src_regd
->n_reg_rules
* sizeof(struct ieee80211_reg_rule
);
314 regd
= kzalloc(size_of_regd
, GFP_KERNEL
);
316 return ERR_PTR(-ENOMEM
);
318 memcpy(regd
, src_regd
, sizeof(struct ieee80211_regdomain
));
320 for (i
= 0; i
< src_regd
->n_reg_rules
; i
++)
321 memcpy(®d
->reg_rules
[i
], &src_regd
->reg_rules
[i
],
322 sizeof(struct ieee80211_reg_rule
));
327 #ifdef CONFIG_CFG80211_INTERNAL_REGDB
328 struct reg_regdb_search_request
{
330 struct list_head list
;
333 static LIST_HEAD(reg_regdb_search_list
);
334 static DEFINE_MUTEX(reg_regdb_search_mutex
);
336 static void reg_regdb_search(struct work_struct
*work
)
338 struct reg_regdb_search_request
*request
;
339 const struct ieee80211_regdomain
*curdom
, *regdom
= NULL
;
342 mutex_lock(&cfg80211_mutex
);
344 mutex_lock(®_regdb_search_mutex
);
345 while (!list_empty(®_regdb_search_list
)) {
346 request
= list_first_entry(®_regdb_search_list
,
347 struct reg_regdb_search_request
,
349 list_del(&request
->list
);
351 for (i
= 0; i
< reg_regdb_size
; i
++) {
352 curdom
= reg_regdb
[i
];
354 if (alpha2_equal(request
->alpha2
, curdom
->alpha2
)) {
355 regdom
= reg_copy_regd(curdom
);
362 mutex_unlock(®_regdb_search_mutex
);
364 if (!IS_ERR_OR_NULL(regdom
))
367 mutex_unlock(&cfg80211_mutex
);
370 static DECLARE_WORK(reg_regdb_work
, reg_regdb_search
);
372 static void reg_regdb_query(const char *alpha2
)
374 struct reg_regdb_search_request
*request
;
379 request
= kzalloc(sizeof(struct reg_regdb_search_request
), GFP_KERNEL
);
383 memcpy(request
->alpha2
, alpha2
, 2);
385 mutex_lock(®_regdb_search_mutex
);
386 list_add_tail(&request
->list
, ®_regdb_search_list
);
387 mutex_unlock(®_regdb_search_mutex
);
389 schedule_work(®_regdb_work
);
392 /* Feel free to add any other sanity checks here */
393 static void reg_regdb_size_check(void)
395 /* We should ideally BUILD_BUG_ON() but then random builds would fail */
396 WARN_ONCE(!reg_regdb_size
, "db.txt is empty, you should update it...");
399 static inline void reg_regdb_size_check(void) {}
400 static inline void reg_regdb_query(const char *alpha2
) {}
401 #endif /* CONFIG_CFG80211_INTERNAL_REGDB */
404 * This lets us keep regulatory code which is updated on a regulatory
405 * basis in userspace. Country information is filled in by
408 static int call_crda(const char *alpha2
)
410 if (!is_world_regdom((char *) alpha2
))
411 pr_info("Calling CRDA for country: %c%c\n",
412 alpha2
[0], alpha2
[1]);
414 pr_info("Calling CRDA to update world regulatory domain\n");
416 /* query internal regulatory database (if it exists) */
417 reg_regdb_query(alpha2
);
419 return kobject_uevent(®_pdev
->dev
.kobj
, KOBJ_CHANGE
);
422 /* Used by nl80211 before kmalloc'ing our regulatory domain */
423 bool reg_is_valid_request(const char *alpha2
)
425 assert_cfg80211_lock();
430 return alpha2_equal(last_request
->alpha2
, alpha2
);
433 /* Sanity check on a regulatory rule */
434 static bool is_valid_reg_rule(const struct ieee80211_reg_rule
*rule
)
436 const struct ieee80211_freq_range
*freq_range
= &rule
->freq_range
;
439 if (freq_range
->start_freq_khz
<= 0 || freq_range
->end_freq_khz
<= 0)
442 if (freq_range
->start_freq_khz
> freq_range
->end_freq_khz
)
445 freq_diff
= freq_range
->end_freq_khz
- freq_range
->start_freq_khz
;
447 if (freq_range
->end_freq_khz
<= freq_range
->start_freq_khz
||
448 freq_range
->max_bandwidth_khz
> freq_diff
)
454 static bool is_valid_rd(const struct ieee80211_regdomain
*rd
)
456 const struct ieee80211_reg_rule
*reg_rule
= NULL
;
459 if (!rd
->n_reg_rules
)
462 if (WARN_ON(rd
->n_reg_rules
> NL80211_MAX_SUPP_REG_RULES
))
465 for (i
= 0; i
< rd
->n_reg_rules
; i
++) {
466 reg_rule
= &rd
->reg_rules
[i
];
467 if (!is_valid_reg_rule(reg_rule
))
474 static bool reg_does_bw_fit(const struct ieee80211_freq_range
*freq_range
,
478 u32 start_freq_khz
, end_freq_khz
;
480 start_freq_khz
= center_freq_khz
- (bw_khz
/2);
481 end_freq_khz
= center_freq_khz
+ (bw_khz
/2);
483 if (start_freq_khz
>= freq_range
->start_freq_khz
&&
484 end_freq_khz
<= freq_range
->end_freq_khz
)
491 * freq_in_rule_band - tells us if a frequency is in a frequency band
492 * @freq_range: frequency rule we want to query
493 * @freq_khz: frequency we are inquiring about
495 * This lets us know if a specific frequency rule is or is not relevant to
496 * a specific frequency's band. Bands are device specific and artificial
497 * definitions (the "2.4 GHz band", the "5 GHz band" and the "60GHz band"),
498 * however it is safe for now to assume that a frequency rule should not be
499 * part of a frequency's band if the start freq or end freq are off by more
500 * than 2 GHz for the 2.4 and 5 GHz bands, and by more than 10 GHz for the
502 * This resolution can be lowered and should be considered as we add
503 * regulatory rule support for other "bands".
505 static bool freq_in_rule_band(const struct ieee80211_freq_range
*freq_range
,
508 #define ONE_GHZ_IN_KHZ 1000000
510 * From 802.11ad: directional multi-gigabit (DMG):
511 * Pertaining to operation in a frequency band containing a channel
512 * with the Channel starting frequency above 45 GHz.
514 u32 limit
= freq_khz
> 45 * ONE_GHZ_IN_KHZ
?
515 10 * ONE_GHZ_IN_KHZ
: 2 * ONE_GHZ_IN_KHZ
;
516 if (abs(freq_khz
- freq_range
->start_freq_khz
) <= limit
)
518 if (abs(freq_khz
- freq_range
->end_freq_khz
) <= limit
)
521 #undef ONE_GHZ_IN_KHZ
525 * Helper for regdom_intersect(), this does the real
526 * mathematical intersection fun
528 static int reg_rules_intersect(const struct ieee80211_reg_rule
*rule1
,
529 const struct ieee80211_reg_rule
*rule2
,
530 struct ieee80211_reg_rule
*intersected_rule
)
532 const struct ieee80211_freq_range
*freq_range1
, *freq_range2
;
533 struct ieee80211_freq_range
*freq_range
;
534 const struct ieee80211_power_rule
*power_rule1
, *power_rule2
;
535 struct ieee80211_power_rule
*power_rule
;
538 freq_range1
= &rule1
->freq_range
;
539 freq_range2
= &rule2
->freq_range
;
540 freq_range
= &intersected_rule
->freq_range
;
542 power_rule1
= &rule1
->power_rule
;
543 power_rule2
= &rule2
->power_rule
;
544 power_rule
= &intersected_rule
->power_rule
;
546 freq_range
->start_freq_khz
= max(freq_range1
->start_freq_khz
,
547 freq_range2
->start_freq_khz
);
548 freq_range
->end_freq_khz
= min(freq_range1
->end_freq_khz
,
549 freq_range2
->end_freq_khz
);
550 freq_range
->max_bandwidth_khz
= min(freq_range1
->max_bandwidth_khz
,
551 freq_range2
->max_bandwidth_khz
);
553 freq_diff
= freq_range
->end_freq_khz
- freq_range
->start_freq_khz
;
554 if (freq_range
->max_bandwidth_khz
> freq_diff
)
555 freq_range
->max_bandwidth_khz
= freq_diff
;
557 power_rule
->max_eirp
= min(power_rule1
->max_eirp
,
558 power_rule2
->max_eirp
);
559 power_rule
->max_antenna_gain
= min(power_rule1
->max_antenna_gain
,
560 power_rule2
->max_antenna_gain
);
562 intersected_rule
->flags
= rule1
->flags
| rule2
->flags
;
564 if (!is_valid_reg_rule(intersected_rule
))
571 * regdom_intersect - do the intersection between two regulatory domains
572 * @rd1: first regulatory domain
573 * @rd2: second regulatory domain
575 * Use this function to get the intersection between two regulatory domains.
576 * Once completed we will mark the alpha2 for the rd as intersected, "98",
577 * as no one single alpha2 can represent this regulatory domain.
579 * Returns a pointer to the regulatory domain structure which will hold the
580 * resulting intersection of rules between rd1 and rd2. We will
581 * kzalloc() this structure for you.
583 static struct ieee80211_regdomain
*
584 regdom_intersect(const struct ieee80211_regdomain
*rd1
,
585 const struct ieee80211_regdomain
*rd2
)
589 unsigned int num_rules
= 0, rule_idx
= 0;
590 const struct ieee80211_reg_rule
*rule1
, *rule2
;
591 struct ieee80211_reg_rule
*intersected_rule
;
592 struct ieee80211_regdomain
*rd
;
593 /* This is just a dummy holder to help us count */
594 struct ieee80211_reg_rule dummy_rule
;
600 * First we get a count of the rules we'll need, then we actually
601 * build them. This is to so we can malloc() and free() a
602 * regdomain once. The reason we use reg_rules_intersect() here
603 * is it will return -EINVAL if the rule computed makes no sense.
604 * All rules that do check out OK are valid.
607 for (x
= 0; x
< rd1
->n_reg_rules
; x
++) {
608 rule1
= &rd1
->reg_rules
[x
];
609 for (y
= 0; y
< rd2
->n_reg_rules
; y
++) {
610 rule2
= &rd2
->reg_rules
[y
];
611 if (!reg_rules_intersect(rule1
, rule2
, &dummy_rule
))
619 size_of_regd
= sizeof(struct ieee80211_regdomain
) +
620 num_rules
* sizeof(struct ieee80211_reg_rule
);
622 rd
= kzalloc(size_of_regd
, GFP_KERNEL
);
626 for (x
= 0; x
< rd1
->n_reg_rules
&& rule_idx
< num_rules
; x
++) {
627 rule1
= &rd1
->reg_rules
[x
];
628 for (y
= 0; y
< rd2
->n_reg_rules
&& rule_idx
< num_rules
; y
++) {
629 rule2
= &rd2
->reg_rules
[y
];
631 * This time around instead of using the stack lets
632 * write to the target rule directly saving ourselves
635 intersected_rule
= &rd
->reg_rules
[rule_idx
];
636 r
= reg_rules_intersect(rule1
, rule2
, intersected_rule
);
638 * No need to memset here the intersected rule here as
639 * we're not using the stack anymore
647 if (rule_idx
!= num_rules
) {
652 rd
->n_reg_rules
= num_rules
;
660 * XXX: add support for the rest of enum nl80211_reg_rule_flags, we may
661 * want to just have the channel structure use these
663 static u32
map_regdom_flags(u32 rd_flags
)
665 u32 channel_flags
= 0;
666 if (rd_flags
& NL80211_RRF_PASSIVE_SCAN
)
667 channel_flags
|= IEEE80211_CHAN_PASSIVE_SCAN
;
668 if (rd_flags
& NL80211_RRF_NO_IBSS
)
669 channel_flags
|= IEEE80211_CHAN_NO_IBSS
;
670 if (rd_flags
& NL80211_RRF_DFS
)
671 channel_flags
|= IEEE80211_CHAN_RADAR
;
672 if (rd_flags
& NL80211_RRF_NO_OFDM
)
673 channel_flags
|= IEEE80211_CHAN_NO_OFDM
;
674 return channel_flags
;
677 static int freq_reg_info_regd(struct wiphy
*wiphy
,
680 const struct ieee80211_reg_rule
**reg_rule
,
681 const struct ieee80211_regdomain
*custom_regd
)
684 bool band_rule_found
= false;
685 const struct ieee80211_regdomain
*regd
;
686 bool bw_fits
= false;
689 desired_bw_khz
= MHZ_TO_KHZ(20);
691 regd
= custom_regd
? custom_regd
: cfg80211_regdomain
;
694 * Follow the driver's regulatory domain, if present, unless a country
695 * IE has been processed or a user wants to help complaince further
698 last_request
->initiator
!= NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
699 last_request
->initiator
!= NL80211_REGDOM_SET_BY_USER
&&
706 for (i
= 0; i
< regd
->n_reg_rules
; i
++) {
707 const struct ieee80211_reg_rule
*rr
;
708 const struct ieee80211_freq_range
*fr
= NULL
;
710 rr
= ®d
->reg_rules
[i
];
711 fr
= &rr
->freq_range
;
714 * We only need to know if one frequency rule was
715 * was in center_freq's band, that's enough, so lets
716 * not overwrite it once found
718 if (!band_rule_found
)
719 band_rule_found
= freq_in_rule_band(fr
, center_freq
);
721 bw_fits
= reg_does_bw_fit(fr
, center_freq
, desired_bw_khz
);
723 if (band_rule_found
&& bw_fits
) {
729 if (!band_rule_found
)
735 int freq_reg_info(struct wiphy
*wiphy
, u32 center_freq
, u32 desired_bw_khz
,
736 const struct ieee80211_reg_rule
**reg_rule
)
738 assert_cfg80211_lock();
740 return freq_reg_info_regd(wiphy
, center_freq
, desired_bw_khz
,
743 EXPORT_SYMBOL(freq_reg_info
);
745 #ifdef CONFIG_CFG80211_REG_DEBUG
746 static const char *reg_initiator_name(enum nl80211_reg_initiator initiator
)
749 case NL80211_REGDOM_SET_BY_CORE
:
750 return "Set by core";
751 case NL80211_REGDOM_SET_BY_USER
:
752 return "Set by user";
753 case NL80211_REGDOM_SET_BY_DRIVER
:
754 return "Set by driver";
755 case NL80211_REGDOM_SET_BY_COUNTRY_IE
:
756 return "Set by country IE";
763 static void chan_reg_rule_print_dbg(struct ieee80211_channel
*chan
,
765 const struct ieee80211_reg_rule
*reg_rule
)
767 const struct ieee80211_power_rule
*power_rule
;
768 const struct ieee80211_freq_range
*freq_range
;
769 char max_antenna_gain
[32];
771 power_rule
= ®_rule
->power_rule
;
772 freq_range
= ®_rule
->freq_range
;
774 if (!power_rule
->max_antenna_gain
)
775 snprintf(max_antenna_gain
, 32, "N/A");
777 snprintf(max_antenna_gain
, 32, "%d", power_rule
->max_antenna_gain
);
779 REG_DBG_PRINT("Updating information on frequency %d MHz for a %d MHz width channel with regulatory rule:\n",
780 chan
->center_freq
, KHZ_TO_MHZ(desired_bw_khz
));
782 REG_DBG_PRINT("%d KHz - %d KHz @ %d KHz), (%s mBi, %d mBm)\n",
783 freq_range
->start_freq_khz
, freq_range
->end_freq_khz
,
784 freq_range
->max_bandwidth_khz
, max_antenna_gain
,
785 power_rule
->max_eirp
);
788 static void chan_reg_rule_print_dbg(struct ieee80211_channel
*chan
,
790 const struct ieee80211_reg_rule
*reg_rule
)
797 * Note that right now we assume the desired channel bandwidth
798 * is always 20 MHz for each individual channel (HT40 uses 20 MHz
799 * per channel, the primary and the extension channel). To support
800 * smaller custom bandwidths such as 5 MHz or 10 MHz we'll need a
801 * new ieee80211_channel.target_bw and re run the regulatory check
802 * on the wiphy with the target_bw specified. Then we can simply use
803 * that below for the desired_bw_khz below.
805 static void handle_channel(struct wiphy
*wiphy
,
806 enum nl80211_reg_initiator initiator
,
807 struct ieee80211_channel
*chan
)
810 u32 flags
, bw_flags
= 0;
811 u32 desired_bw_khz
= MHZ_TO_KHZ(20);
812 const struct ieee80211_reg_rule
*reg_rule
= NULL
;
813 const struct ieee80211_power_rule
*power_rule
= NULL
;
814 const struct ieee80211_freq_range
*freq_range
= NULL
;
815 struct wiphy
*request_wiphy
= NULL
;
817 assert_cfg80211_lock();
819 request_wiphy
= wiphy_idx_to_wiphy(last_request
->wiphy_idx
);
821 flags
= chan
->orig_flags
;
823 r
= freq_reg_info(wiphy
, MHZ_TO_KHZ(chan
->center_freq
),
824 desired_bw_khz
, ®_rule
);
827 * We will disable all channels that do not match our
828 * received regulatory rule unless the hint is coming
829 * from a Country IE and the Country IE had no information
830 * about a band. The IEEE 802.11 spec allows for an AP
831 * to send only a subset of the regulatory rules allowed,
832 * so an AP in the US that only supports 2.4 GHz may only send
833 * a country IE with information for the 2.4 GHz band
834 * while 5 GHz is still supported.
836 if (initiator
== NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
840 REG_DBG_PRINT("Disabling freq %d MHz\n", chan
->center_freq
);
841 chan
->flags
= IEEE80211_CHAN_DISABLED
;
845 chan_reg_rule_print_dbg(chan
, desired_bw_khz
, reg_rule
);
847 power_rule
= ®_rule
->power_rule
;
848 freq_range
= ®_rule
->freq_range
;
850 if (freq_range
->max_bandwidth_khz
< MHZ_TO_KHZ(40))
851 bw_flags
= IEEE80211_CHAN_NO_HT40
;
853 if (last_request
->initiator
== NL80211_REGDOM_SET_BY_DRIVER
&&
854 request_wiphy
&& request_wiphy
== wiphy
&&
855 request_wiphy
->flags
& WIPHY_FLAG_STRICT_REGULATORY
) {
857 * This guarantees the driver's requested regulatory domain
858 * will always be used as a base for further regulatory
861 chan
->flags
= chan
->orig_flags
=
862 map_regdom_flags(reg_rule
->flags
) | bw_flags
;
863 chan
->max_antenna_gain
= chan
->orig_mag
=
864 (int) MBI_TO_DBI(power_rule
->max_antenna_gain
);
865 chan
->max_reg_power
= chan
->max_power
= chan
->orig_mpwr
=
866 (int) MBM_TO_DBM(power_rule
->max_eirp
);
870 chan
->beacon_found
= false;
871 chan
->flags
= flags
| bw_flags
| map_regdom_flags(reg_rule
->flags
);
872 chan
->max_antenna_gain
=
873 min_t(int, chan
->orig_mag
,
874 MBI_TO_DBI(power_rule
->max_antenna_gain
));
875 chan
->max_reg_power
= (int) MBM_TO_DBM(power_rule
->max_eirp
);
876 if (chan
->orig_mpwr
) {
878 * Devices that have their own custom regulatory domain
879 * but also use WIPHY_FLAG_STRICT_REGULATORY will follow the
880 * passed country IE power settings.
882 if (initiator
== NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
883 wiphy
->flags
& WIPHY_FLAG_CUSTOM_REGULATORY
&&
884 wiphy
->flags
& WIPHY_FLAG_STRICT_REGULATORY
)
885 chan
->max_power
= chan
->max_reg_power
;
887 chan
->max_power
= min(chan
->orig_mpwr
,
888 chan
->max_reg_power
);
890 chan
->max_power
= chan
->max_reg_power
;
893 static void handle_band(struct wiphy
*wiphy
,
894 enum nl80211_reg_initiator initiator
,
895 struct ieee80211_supported_band
*sband
)
902 for (i
= 0; i
< sband
->n_channels
; i
++)
903 handle_channel(wiphy
, initiator
, &sband
->channels
[i
]);
906 static bool reg_request_cell_base(struct regulatory_request
*request
)
908 if (request
->initiator
!= NL80211_REGDOM_SET_BY_USER
)
910 return request
->user_reg_hint_type
== NL80211_USER_REG_HINT_CELL_BASE
;
913 bool reg_last_request_cell_base(void)
917 assert_cfg80211_lock();
919 mutex_lock(®_mutex
);
920 val
= reg_request_cell_base(last_request
);
921 mutex_unlock(®_mutex
);
926 #ifdef CONFIG_CFG80211_CERTIFICATION_ONUS
927 /* Core specific check */
928 static enum reg_request_treatment
929 reg_ignore_cell_hint(struct regulatory_request
*pending_request
)
931 if (!reg_num_devs_support_basehint
)
932 return REG_REQ_IGNORE
;
934 if (reg_request_cell_base(last_request
) &&
935 !regdom_changes(pending_request
->alpha2
))
936 return REG_REQ_ALREADY_SET
;
941 /* Device specific check */
942 static bool reg_dev_ignore_cell_hint(struct wiphy
*wiphy
)
944 return !(wiphy
->features
& NL80211_FEATURE_CELL_BASE_REG_HINTS
);
947 static int reg_ignore_cell_hint(struct regulatory_request
*pending_request
)
949 return REG_REQ_IGNORE
;
952 static bool reg_dev_ignore_cell_hint(struct wiphy
*wiphy
)
959 static bool ignore_reg_update(struct wiphy
*wiphy
,
960 enum nl80211_reg_initiator initiator
)
963 REG_DBG_PRINT("Ignoring regulatory request %s since last_request is not set\n",
964 reg_initiator_name(initiator
));
968 if (initiator
== NL80211_REGDOM_SET_BY_CORE
&&
969 wiphy
->flags
& WIPHY_FLAG_CUSTOM_REGULATORY
) {
970 REG_DBG_PRINT("Ignoring regulatory request %s since the driver uses its own custom regulatory domain\n",
971 reg_initiator_name(initiator
));
976 * wiphy->regd will be set once the device has its own
977 * desired regulatory domain set
979 if (wiphy
->flags
& WIPHY_FLAG_STRICT_REGULATORY
&& !wiphy
->regd
&&
980 initiator
!= NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
981 !is_world_regdom(last_request
->alpha2
)) {
982 REG_DBG_PRINT("Ignoring regulatory request %s since the driver requires its own regulatory domain to be set first\n",
983 reg_initiator_name(initiator
));
987 if (reg_request_cell_base(last_request
))
988 return reg_dev_ignore_cell_hint(wiphy
);
993 static void handle_reg_beacon(struct wiphy
*wiphy
, unsigned int chan_idx
,
994 struct reg_beacon
*reg_beacon
)
996 struct ieee80211_supported_band
*sband
;
997 struct ieee80211_channel
*chan
;
998 bool channel_changed
= false;
999 struct ieee80211_channel chan_before
;
1001 assert_cfg80211_lock();
1003 sband
= wiphy
->bands
[reg_beacon
->chan
.band
];
1004 chan
= &sband
->channels
[chan_idx
];
1006 if (likely(chan
->center_freq
!= reg_beacon
->chan
.center_freq
))
1009 if (chan
->beacon_found
)
1012 chan
->beacon_found
= true;
1014 if (wiphy
->flags
& WIPHY_FLAG_DISABLE_BEACON_HINTS
)
1017 chan_before
.center_freq
= chan
->center_freq
;
1018 chan_before
.flags
= chan
->flags
;
1020 if (chan
->flags
& IEEE80211_CHAN_PASSIVE_SCAN
) {
1021 chan
->flags
&= ~IEEE80211_CHAN_PASSIVE_SCAN
;
1022 channel_changed
= true;
1025 if (chan
->flags
& IEEE80211_CHAN_NO_IBSS
) {
1026 chan
->flags
&= ~IEEE80211_CHAN_NO_IBSS
;
1027 channel_changed
= true;
1030 if (channel_changed
)
1031 nl80211_send_beacon_hint_event(wiphy
, &chan_before
, chan
);
1035 * Called when a scan on a wiphy finds a beacon on
1038 static void wiphy_update_new_beacon(struct wiphy
*wiphy
,
1039 struct reg_beacon
*reg_beacon
)
1042 struct ieee80211_supported_band
*sband
;
1044 assert_cfg80211_lock();
1046 if (!wiphy
->bands
[reg_beacon
->chan
.band
])
1049 sband
= wiphy
->bands
[reg_beacon
->chan
.band
];
1051 for (i
= 0; i
< sband
->n_channels
; i
++)
1052 handle_reg_beacon(wiphy
, i
, reg_beacon
);
1056 * Called upon reg changes or a new wiphy is added
1058 static void wiphy_update_beacon_reg(struct wiphy
*wiphy
)
1061 struct ieee80211_supported_band
*sband
;
1062 struct reg_beacon
*reg_beacon
;
1064 assert_cfg80211_lock();
1066 list_for_each_entry(reg_beacon
, ®_beacon_list
, list
) {
1067 if (!wiphy
->bands
[reg_beacon
->chan
.band
])
1069 sband
= wiphy
->bands
[reg_beacon
->chan
.band
];
1070 for (i
= 0; i
< sband
->n_channels
; i
++)
1071 handle_reg_beacon(wiphy
, i
, reg_beacon
);
1075 static bool reg_is_world_roaming(struct wiphy
*wiphy
)
1077 if (is_world_regdom(cfg80211_regdomain
->alpha2
) ||
1078 (wiphy
->regd
&& is_world_regdom(wiphy
->regd
->alpha2
)))
1081 last_request
->initiator
!= NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
1082 wiphy
->flags
& WIPHY_FLAG_CUSTOM_REGULATORY
)
1087 /* Reap the advantages of previously found beacons */
1088 static void reg_process_beacons(struct wiphy
*wiphy
)
1091 * Means we are just firing up cfg80211, so no beacons would
1092 * have been processed yet.
1096 if (!reg_is_world_roaming(wiphy
))
1098 wiphy_update_beacon_reg(wiphy
);
1101 static bool is_ht40_allowed(struct ieee80211_channel
*chan
)
1105 if (chan
->flags
& IEEE80211_CHAN_DISABLED
)
1107 /* This would happen when regulatory rules disallow HT40 completely */
1108 return !(chan
->flags
& IEEE80211_CHAN_NO_HT40
);
1111 static void reg_process_ht_flags_channel(struct wiphy
*wiphy
,
1112 struct ieee80211_channel
*channel
)
1114 struct ieee80211_supported_band
*sband
= wiphy
->bands
[channel
->band
];
1115 struct ieee80211_channel
*channel_before
= NULL
, *channel_after
= NULL
;
1118 assert_cfg80211_lock();
1120 if (!is_ht40_allowed(channel
)) {
1121 channel
->flags
|= IEEE80211_CHAN_NO_HT40
;
1126 * We need to ensure the extension channels exist to
1127 * be able to use HT40- or HT40+, this finds them (or not)
1129 for (i
= 0; i
< sband
->n_channels
; i
++) {
1130 struct ieee80211_channel
*c
= &sband
->channels
[i
];
1132 if (c
->center_freq
== (channel
->center_freq
- 20))
1134 if (c
->center_freq
== (channel
->center_freq
+ 20))
1139 * Please note that this assumes target bandwidth is 20 MHz,
1140 * if that ever changes we also need to change the below logic
1141 * to include that as well.
1143 if (!is_ht40_allowed(channel_before
))
1144 channel
->flags
|= IEEE80211_CHAN_NO_HT40MINUS
;
1146 channel
->flags
&= ~IEEE80211_CHAN_NO_HT40MINUS
;
1148 if (!is_ht40_allowed(channel_after
))
1149 channel
->flags
|= IEEE80211_CHAN_NO_HT40PLUS
;
1151 channel
->flags
&= ~IEEE80211_CHAN_NO_HT40PLUS
;
1154 static void reg_process_ht_flags_band(struct wiphy
*wiphy
,
1155 struct ieee80211_supported_band
*sband
)
1162 for (i
= 0; i
< sband
->n_channels
; i
++)
1163 reg_process_ht_flags_channel(wiphy
, &sband
->channels
[i
]);
1166 static void reg_process_ht_flags(struct wiphy
*wiphy
)
1168 enum ieee80211_band band
;
1173 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++)
1174 reg_process_ht_flags_band(wiphy
, wiphy
->bands
[band
]);
1177 static void wiphy_update_regulatory(struct wiphy
*wiphy
,
1178 enum nl80211_reg_initiator initiator
)
1180 enum ieee80211_band band
;
1184 if (ignore_reg_update(wiphy
, initiator
))
1187 last_request
->dfs_region
= cfg80211_regdomain
->dfs_region
;
1189 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++)
1190 handle_band(wiphy
, initiator
, wiphy
->bands
[band
]);
1192 reg_process_beacons(wiphy
);
1193 reg_process_ht_flags(wiphy
);
1195 if (wiphy
->reg_notifier
)
1196 wiphy
->reg_notifier(wiphy
, last_request
);
1199 static void update_all_wiphy_regulatory(enum nl80211_reg_initiator initiator
)
1201 struct cfg80211_registered_device
*rdev
;
1202 struct wiphy
*wiphy
;
1204 list_for_each_entry(rdev
, &cfg80211_rdev_list
, list
) {
1205 wiphy
= &rdev
->wiphy
;
1206 wiphy_update_regulatory(wiphy
, initiator
);
1208 * Regulatory updates set by CORE are ignored for custom
1209 * regulatory cards. Let us notify the changes to the driver,
1210 * as some drivers used this to restore its orig_* reg domain.
1212 if (initiator
== NL80211_REGDOM_SET_BY_CORE
&&
1213 wiphy
->flags
& WIPHY_FLAG_CUSTOM_REGULATORY
&&
1214 wiphy
->reg_notifier
)
1215 wiphy
->reg_notifier(wiphy
, last_request
);
1219 static void handle_channel_custom(struct wiphy
*wiphy
,
1220 struct ieee80211_channel
*chan
,
1221 const struct ieee80211_regdomain
*regd
)
1224 u32 desired_bw_khz
= MHZ_TO_KHZ(20);
1226 const struct ieee80211_reg_rule
*reg_rule
= NULL
;
1227 const struct ieee80211_power_rule
*power_rule
= NULL
;
1228 const struct ieee80211_freq_range
*freq_range
= NULL
;
1232 r
= freq_reg_info_regd(wiphy
, MHZ_TO_KHZ(chan
->center_freq
),
1233 desired_bw_khz
, ®_rule
, regd
);
1236 REG_DBG_PRINT("Disabling freq %d MHz as custom regd has no rule that fits a %d MHz wide channel\n",
1237 chan
->center_freq
, KHZ_TO_MHZ(desired_bw_khz
));
1238 chan
->flags
= IEEE80211_CHAN_DISABLED
;
1242 chan_reg_rule_print_dbg(chan
, desired_bw_khz
, reg_rule
);
1244 power_rule
= ®_rule
->power_rule
;
1245 freq_range
= ®_rule
->freq_range
;
1247 if (freq_range
->max_bandwidth_khz
< MHZ_TO_KHZ(40))
1248 bw_flags
= IEEE80211_CHAN_NO_HT40
;
1250 chan
->flags
|= map_regdom_flags(reg_rule
->flags
) | bw_flags
;
1251 chan
->max_antenna_gain
= (int) MBI_TO_DBI(power_rule
->max_antenna_gain
);
1252 chan
->max_reg_power
= chan
->max_power
=
1253 (int) MBM_TO_DBM(power_rule
->max_eirp
);
1256 static void handle_band_custom(struct wiphy
*wiphy
,
1257 struct ieee80211_supported_band
*sband
,
1258 const struct ieee80211_regdomain
*regd
)
1265 for (i
= 0; i
< sband
->n_channels
; i
++)
1266 handle_channel_custom(wiphy
, &sband
->channels
[i
], regd
);
1269 /* Used by drivers prior to wiphy registration */
1270 void wiphy_apply_custom_regulatory(struct wiphy
*wiphy
,
1271 const struct ieee80211_regdomain
*regd
)
1273 enum ieee80211_band band
;
1274 unsigned int bands_set
= 0;
1276 mutex_lock(®_mutex
);
1277 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++) {
1278 if (!wiphy
->bands
[band
])
1280 handle_band_custom(wiphy
, wiphy
->bands
[band
], regd
);
1283 mutex_unlock(®_mutex
);
1286 * no point in calling this if it won't have any effect
1287 * on your device's supported bands.
1289 WARN_ON(!bands_set
);
1291 EXPORT_SYMBOL(wiphy_apply_custom_regulatory
);
1293 /* This has the logic which determines when a new request
1294 * should be ignored. */
1295 static enum reg_request_treatment
1296 get_reg_request_treatment(struct wiphy
*wiphy
,
1297 struct regulatory_request
*pending_request
)
1299 struct wiphy
*last_wiphy
= NULL
;
1301 assert_cfg80211_lock();
1303 /* All initial requests are respected */
1307 switch (pending_request
->initiator
) {
1308 case NL80211_REGDOM_SET_BY_CORE
:
1310 case NL80211_REGDOM_SET_BY_COUNTRY_IE
:
1311 if (reg_request_cell_base(last_request
)) {
1312 /* Trust a Cell base station over the AP's country IE */
1313 if (regdom_changes(pending_request
->alpha2
))
1314 return REG_REQ_IGNORE
;
1315 return REG_REQ_ALREADY_SET
;
1318 last_wiphy
= wiphy_idx_to_wiphy(last_request
->wiphy_idx
);
1320 if (unlikely(!is_an_alpha2(pending_request
->alpha2
)))
1322 if (last_request
->initiator
==
1323 NL80211_REGDOM_SET_BY_COUNTRY_IE
) {
1324 if (last_wiphy
!= wiphy
) {
1326 * Two cards with two APs claiming different
1327 * Country IE alpha2s. We could
1328 * intersect them, but that seems unlikely
1329 * to be correct. Reject second one for now.
1331 if (regdom_changes(pending_request
->alpha2
))
1332 return REG_REQ_IGNORE
;
1333 return REG_REQ_ALREADY_SET
;
1336 * Two consecutive Country IE hints on the same wiphy.
1337 * This should be picked up early by the driver/stack
1339 if (WARN_ON(regdom_changes(pending_request
->alpha2
)))
1341 return REG_REQ_ALREADY_SET
;
1344 case NL80211_REGDOM_SET_BY_DRIVER
:
1345 if (last_request
->initiator
== NL80211_REGDOM_SET_BY_CORE
) {
1346 if (regdom_changes(pending_request
->alpha2
))
1348 return REG_REQ_ALREADY_SET
;
1352 * This would happen if you unplug and plug your card
1353 * back in or if you add a new device for which the previously
1354 * loaded card also agrees on the regulatory domain.
1356 if (last_request
->initiator
== NL80211_REGDOM_SET_BY_DRIVER
&&
1357 !regdom_changes(pending_request
->alpha2
))
1358 return REG_REQ_ALREADY_SET
;
1360 return REG_REQ_INTERSECT
;
1361 case NL80211_REGDOM_SET_BY_USER
:
1362 if (reg_request_cell_base(pending_request
))
1363 return reg_ignore_cell_hint(pending_request
);
1365 if (reg_request_cell_base(last_request
))
1366 return REG_REQ_IGNORE
;
1368 if (last_request
->initiator
== NL80211_REGDOM_SET_BY_COUNTRY_IE
)
1369 return REG_REQ_INTERSECT
;
1371 * If the user knows better the user should set the regdom
1372 * to their country before the IE is picked up
1374 if (last_request
->initiator
== NL80211_REGDOM_SET_BY_USER
&&
1375 last_request
->intersect
)
1376 return REG_REQ_IGNORE
;
1378 * Process user requests only after previous user/driver/core
1379 * requests have been processed
1381 if ((last_request
->initiator
== NL80211_REGDOM_SET_BY_CORE
||
1382 last_request
->initiator
== NL80211_REGDOM_SET_BY_DRIVER
||
1383 last_request
->initiator
== NL80211_REGDOM_SET_BY_USER
) &&
1384 regdom_changes(last_request
->alpha2
))
1385 return REG_REQ_IGNORE
;
1387 if (!regdom_changes(pending_request
->alpha2
))
1388 return REG_REQ_ALREADY_SET
;
1393 return REG_REQ_IGNORE
;
1396 static void reg_set_request_processed(void)
1398 bool need_more_processing
= false;
1400 last_request
->processed
= true;
1402 spin_lock(®_requests_lock
);
1403 if (!list_empty(®_requests_list
))
1404 need_more_processing
= true;
1405 spin_unlock(®_requests_lock
);
1407 if (last_request
->initiator
== NL80211_REGDOM_SET_BY_USER
)
1408 cancel_delayed_work(®_timeout
);
1410 if (need_more_processing
)
1411 schedule_work(®_work
);
1415 * __regulatory_hint - hint to the wireless core a regulatory domain
1416 * @wiphy: if the hint comes from country information from an AP, this
1417 * is required to be set to the wiphy that received the information
1418 * @pending_request: the regulatory request currently being processed
1420 * The Wireless subsystem can use this function to hint to the wireless core
1421 * what it believes should be the current regulatory domain.
1423 * Returns one of the different reg request treatment values.
1425 * Caller must hold &cfg80211_mutex and ®_mutex
1427 static enum reg_request_treatment
1428 __regulatory_hint(struct wiphy
*wiphy
,
1429 struct regulatory_request
*pending_request
)
1431 const struct ieee80211_regdomain
*regd
;
1432 bool intersect
= false;
1433 enum reg_request_treatment treatment
;
1435 assert_cfg80211_lock();
1437 treatment
= get_reg_request_treatment(wiphy
, pending_request
);
1439 switch (treatment
) {
1440 case REG_REQ_INTERSECT
:
1441 if (pending_request
->initiator
==
1442 NL80211_REGDOM_SET_BY_DRIVER
) {
1443 regd
= reg_copy_regd(cfg80211_regdomain
);
1445 kfree(pending_request
);
1446 return PTR_ERR(regd
);
1456 * If the regulatory domain being requested by the
1457 * driver has already been set just copy it to the
1460 if (treatment
== REG_REQ_ALREADY_SET
&&
1461 pending_request
->initiator
== NL80211_REGDOM_SET_BY_DRIVER
) {
1462 regd
= reg_copy_regd(cfg80211_regdomain
);
1464 kfree(pending_request
);
1465 return REG_REQ_IGNORE
;
1467 treatment
= REG_REQ_ALREADY_SET
;
1471 kfree(pending_request
);
1476 if (last_request
!= &core_request_world
)
1477 kfree(last_request
);
1479 last_request
= pending_request
;
1480 last_request
->intersect
= intersect
;
1482 pending_request
= NULL
;
1484 if (last_request
->initiator
== NL80211_REGDOM_SET_BY_USER
) {
1485 user_alpha2
[0] = last_request
->alpha2
[0];
1486 user_alpha2
[1] = last_request
->alpha2
[1];
1489 /* When r == REG_REQ_INTERSECT we do need to call CRDA */
1490 if (treatment
!= REG_REQ_OK
&& treatment
!= REG_REQ_INTERSECT
) {
1492 * Since CRDA will not be called in this case as we already
1493 * have applied the requested regulatory domain before we just
1494 * inform userspace we have processed the request
1496 if (treatment
== REG_REQ_ALREADY_SET
) {
1497 nl80211_send_reg_change_event(last_request
);
1498 reg_set_request_processed();
1503 if (call_crda(last_request
->alpha2
))
1504 return REG_REQ_IGNORE
;
1508 /* This processes *all* regulatory hints */
1509 static void reg_process_hint(struct regulatory_request
*reg_request
,
1510 enum nl80211_reg_initiator reg_initiator
)
1512 struct wiphy
*wiphy
= NULL
;
1514 if (WARN_ON(!reg_request
->alpha2
))
1517 if (reg_request
->wiphy_idx
!= WIPHY_IDX_INVALID
)
1518 wiphy
= wiphy_idx_to_wiphy(reg_request
->wiphy_idx
);
1520 if (reg_initiator
== NL80211_REGDOM_SET_BY_DRIVER
&& !wiphy
) {
1525 switch (__regulatory_hint(wiphy
, reg_request
)) {
1526 case REG_REQ_ALREADY_SET
:
1527 /* This is required so that the orig_* parameters are saved */
1528 if (wiphy
&& wiphy
->flags
& WIPHY_FLAG_STRICT_REGULATORY
)
1529 wiphy_update_regulatory(wiphy
, reg_initiator
);
1532 if (reg_initiator
== NL80211_REGDOM_SET_BY_USER
)
1533 schedule_delayed_work(®_timeout
,
1534 msecs_to_jiffies(3142));
1540 * Processes regulatory hints, this is all the NL80211_REGDOM_SET_BY_*
1541 * Regulatory hints come on a first come first serve basis and we
1542 * must process each one atomically.
1544 static void reg_process_pending_hints(void)
1546 struct regulatory_request
*reg_request
;
1548 mutex_lock(&cfg80211_mutex
);
1549 mutex_lock(®_mutex
);
1551 /* When last_request->processed becomes true this will be rescheduled */
1552 if (last_request
&& !last_request
->processed
) {
1553 REG_DBG_PRINT("Pending regulatory request, waiting for it to be processed...\n");
1557 spin_lock(®_requests_lock
);
1559 if (list_empty(®_requests_list
)) {
1560 spin_unlock(®_requests_lock
);
1564 reg_request
= list_first_entry(®_requests_list
,
1565 struct regulatory_request
,
1567 list_del_init(®_request
->list
);
1569 spin_unlock(®_requests_lock
);
1571 reg_process_hint(reg_request
, reg_request
->initiator
);
1574 mutex_unlock(®_mutex
);
1575 mutex_unlock(&cfg80211_mutex
);
1578 /* Processes beacon hints -- this has nothing to do with country IEs */
1579 static void reg_process_pending_beacon_hints(void)
1581 struct cfg80211_registered_device
*rdev
;
1582 struct reg_beacon
*pending_beacon
, *tmp
;
1585 * No need to hold the reg_mutex here as we just touch wiphys
1586 * and do not read or access regulatory variables.
1588 mutex_lock(&cfg80211_mutex
);
1590 /* This goes through the _pending_ beacon list */
1591 spin_lock_bh(®_pending_beacons_lock
);
1593 list_for_each_entry_safe(pending_beacon
, tmp
,
1594 ®_pending_beacons
, list
) {
1595 list_del_init(&pending_beacon
->list
);
1597 /* Applies the beacon hint to current wiphys */
1598 list_for_each_entry(rdev
, &cfg80211_rdev_list
, list
)
1599 wiphy_update_new_beacon(&rdev
->wiphy
, pending_beacon
);
1601 /* Remembers the beacon hint for new wiphys or reg changes */
1602 list_add_tail(&pending_beacon
->list
, ®_beacon_list
);
1605 spin_unlock_bh(®_pending_beacons_lock
);
1606 mutex_unlock(&cfg80211_mutex
);
1609 static void reg_todo(struct work_struct
*work
)
1611 reg_process_pending_hints();
1612 reg_process_pending_beacon_hints();
1615 static void queue_regulatory_request(struct regulatory_request
*request
)
1617 if (isalpha(request
->alpha2
[0]))
1618 request
->alpha2
[0] = toupper(request
->alpha2
[0]);
1619 if (isalpha(request
->alpha2
[1]))
1620 request
->alpha2
[1] = toupper(request
->alpha2
[1]);
1622 spin_lock(®_requests_lock
);
1623 list_add_tail(&request
->list
, ®_requests_list
);
1624 spin_unlock(®_requests_lock
);
1626 schedule_work(®_work
);
1630 * Core regulatory hint -- happens during cfg80211_init()
1631 * and when we restore regulatory settings.
1633 static int regulatory_hint_core(const char *alpha2
)
1635 struct regulatory_request
*request
;
1637 request
= kzalloc(sizeof(struct regulatory_request
), GFP_KERNEL
);
1641 request
->alpha2
[0] = alpha2
[0];
1642 request
->alpha2
[1] = alpha2
[1];
1643 request
->initiator
= NL80211_REGDOM_SET_BY_CORE
;
1645 queue_regulatory_request(request
);
1651 int regulatory_hint_user(const char *alpha2
,
1652 enum nl80211_user_reg_hint_type user_reg_hint_type
)
1654 struct regulatory_request
*request
;
1656 if (WARN_ON(!alpha2
))
1659 request
= kzalloc(sizeof(struct regulatory_request
), GFP_KERNEL
);
1663 request
->wiphy_idx
= WIPHY_IDX_INVALID
;
1664 request
->alpha2
[0] = alpha2
[0];
1665 request
->alpha2
[1] = alpha2
[1];
1666 request
->initiator
= NL80211_REGDOM_SET_BY_USER
;
1667 request
->user_reg_hint_type
= user_reg_hint_type
;
1669 queue_regulatory_request(request
);
1675 int regulatory_hint(struct wiphy
*wiphy
, const char *alpha2
)
1677 struct regulatory_request
*request
;
1679 if (WARN_ON(!alpha2
|| !wiphy
))
1682 request
= kzalloc(sizeof(struct regulatory_request
), GFP_KERNEL
);
1686 request
->wiphy_idx
= get_wiphy_idx(wiphy
);
1688 request
->alpha2
[0] = alpha2
[0];
1689 request
->alpha2
[1] = alpha2
[1];
1690 request
->initiator
= NL80211_REGDOM_SET_BY_DRIVER
;
1692 queue_regulatory_request(request
);
1696 EXPORT_SYMBOL(regulatory_hint
);
1699 * We hold wdev_lock() here so we cannot hold cfg80211_mutex() and
1700 * therefore cannot iterate over the rdev list here.
1702 void regulatory_hint_11d(struct wiphy
*wiphy
, enum ieee80211_band band
,
1703 const u8
*country_ie
, u8 country_ie_len
)
1706 enum environment_cap env
= ENVIRON_ANY
;
1707 struct regulatory_request
*request
;
1709 mutex_lock(®_mutex
);
1711 if (unlikely(!last_request
))
1714 /* IE len must be evenly divisible by 2 */
1715 if (country_ie_len
& 0x01)
1718 if (country_ie_len
< IEEE80211_COUNTRY_IE_MIN_LEN
)
1721 alpha2
[0] = country_ie
[0];
1722 alpha2
[1] = country_ie
[1];
1724 if (country_ie
[2] == 'I')
1725 env
= ENVIRON_INDOOR
;
1726 else if (country_ie
[2] == 'O')
1727 env
= ENVIRON_OUTDOOR
;
1730 * We will run this only upon a successful connection on cfg80211.
1731 * We leave conflict resolution to the workqueue, where can hold
1734 if (last_request
->initiator
== NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
1735 last_request
->wiphy_idx
!= WIPHY_IDX_INVALID
)
1738 request
= kzalloc(sizeof(struct regulatory_request
), GFP_KERNEL
);
1742 request
->wiphy_idx
= get_wiphy_idx(wiphy
);
1743 request
->alpha2
[0] = alpha2
[0];
1744 request
->alpha2
[1] = alpha2
[1];
1745 request
->initiator
= NL80211_REGDOM_SET_BY_COUNTRY_IE
;
1746 request
->country_ie_env
= env
;
1748 queue_regulatory_request(request
);
1750 mutex_unlock(®_mutex
);
1753 static void restore_alpha2(char *alpha2
, bool reset_user
)
1755 /* indicates there is no alpha2 to consider for restoration */
1759 /* The user setting has precedence over the module parameter */
1760 if (is_user_regdom_saved()) {
1761 /* Unless we're asked to ignore it and reset it */
1763 REG_DBG_PRINT("Restoring regulatory settings including user preference\n");
1764 user_alpha2
[0] = '9';
1765 user_alpha2
[1] = '7';
1768 * If we're ignoring user settings, we still need to
1769 * check the module parameter to ensure we put things
1770 * back as they were for a full restore.
1772 if (!is_world_regdom(ieee80211_regdom
)) {
1773 REG_DBG_PRINT("Keeping preference on module parameter ieee80211_regdom: %c%c\n",
1774 ieee80211_regdom
[0], ieee80211_regdom
[1]);
1775 alpha2
[0] = ieee80211_regdom
[0];
1776 alpha2
[1] = ieee80211_regdom
[1];
1779 REG_DBG_PRINT("Restoring regulatory settings while preserving user preference for: %c%c\n",
1780 user_alpha2
[0], user_alpha2
[1]);
1781 alpha2
[0] = user_alpha2
[0];
1782 alpha2
[1] = user_alpha2
[1];
1784 } else if (!is_world_regdom(ieee80211_regdom
)) {
1785 REG_DBG_PRINT("Keeping preference on module parameter ieee80211_regdom: %c%c\n",
1786 ieee80211_regdom
[0], ieee80211_regdom
[1]);
1787 alpha2
[0] = ieee80211_regdom
[0];
1788 alpha2
[1] = ieee80211_regdom
[1];
1790 REG_DBG_PRINT("Restoring regulatory settings\n");
1793 static void restore_custom_reg_settings(struct wiphy
*wiphy
)
1795 struct ieee80211_supported_band
*sband
;
1796 enum ieee80211_band band
;
1797 struct ieee80211_channel
*chan
;
1800 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++) {
1801 sband
= wiphy
->bands
[band
];
1804 for (i
= 0; i
< sband
->n_channels
; i
++) {
1805 chan
= &sband
->channels
[i
];
1806 chan
->flags
= chan
->orig_flags
;
1807 chan
->max_antenna_gain
= chan
->orig_mag
;
1808 chan
->max_power
= chan
->orig_mpwr
;
1809 chan
->beacon_found
= false;
1815 * Restoring regulatory settings involves ingoring any
1816 * possibly stale country IE information and user regulatory
1817 * settings if so desired, this includes any beacon hints
1818 * learned as we could have traveled outside to another country
1819 * after disconnection. To restore regulatory settings we do
1820 * exactly what we did at bootup:
1822 * - send a core regulatory hint
1823 * - send a user regulatory hint if applicable
1825 * Device drivers that send a regulatory hint for a specific country
1826 * keep their own regulatory domain on wiphy->regd so that does does
1827 * not need to be remembered.
1829 static void restore_regulatory_settings(bool reset_user
)
1832 char world_alpha2
[2];
1833 struct reg_beacon
*reg_beacon
, *btmp
;
1834 struct regulatory_request
*reg_request
, *tmp
;
1835 LIST_HEAD(tmp_reg_req_list
);
1836 struct cfg80211_registered_device
*rdev
;
1838 mutex_lock(&cfg80211_mutex
);
1839 mutex_lock(®_mutex
);
1841 reset_regdomains(true);
1842 restore_alpha2(alpha2
, reset_user
);
1845 * If there's any pending requests we simply
1846 * stash them to a temporary pending queue and
1847 * add then after we've restored regulatory
1850 spin_lock(®_requests_lock
);
1851 list_for_each_entry_safe(reg_request
, tmp
, ®_requests_list
, list
) {
1852 if (reg_request
->initiator
!= NL80211_REGDOM_SET_BY_USER
)
1854 list_move_tail(®_request
->list
, &tmp_reg_req_list
);
1856 spin_unlock(®_requests_lock
);
1858 /* Clear beacon hints */
1859 spin_lock_bh(®_pending_beacons_lock
);
1860 list_for_each_entry_safe(reg_beacon
, btmp
, ®_pending_beacons
, list
) {
1861 list_del(®_beacon
->list
);
1864 spin_unlock_bh(®_pending_beacons_lock
);
1866 list_for_each_entry_safe(reg_beacon
, btmp
, ®_beacon_list
, list
) {
1867 list_del(®_beacon
->list
);
1871 /* First restore to the basic regulatory settings */
1872 cfg80211_regdomain
= cfg80211_world_regdom
;
1873 world_alpha2
[0] = cfg80211_regdomain
->alpha2
[0];
1874 world_alpha2
[1] = cfg80211_regdomain
->alpha2
[1];
1876 list_for_each_entry(rdev
, &cfg80211_rdev_list
, list
) {
1877 if (rdev
->wiphy
.flags
& WIPHY_FLAG_CUSTOM_REGULATORY
)
1878 restore_custom_reg_settings(&rdev
->wiphy
);
1881 mutex_unlock(®_mutex
);
1882 mutex_unlock(&cfg80211_mutex
);
1884 regulatory_hint_core(world_alpha2
);
1887 * This restores the ieee80211_regdom module parameter
1888 * preference or the last user requested regulatory
1889 * settings, user regulatory settings takes precedence.
1891 if (is_an_alpha2(alpha2
))
1892 regulatory_hint_user(user_alpha2
, NL80211_USER_REG_HINT_USER
);
1894 if (list_empty(&tmp_reg_req_list
))
1897 mutex_lock(&cfg80211_mutex
);
1898 mutex_lock(®_mutex
);
1900 spin_lock(®_requests_lock
);
1901 list_for_each_entry_safe(reg_request
, tmp
, &tmp_reg_req_list
, list
) {
1902 REG_DBG_PRINT("Adding request for country %c%c back into the queue\n",
1903 reg_request
->alpha2
[0], reg_request
->alpha2
[1]);
1904 list_move_tail(®_request
->list
, ®_requests_list
);
1906 spin_unlock(®_requests_lock
);
1908 mutex_unlock(®_mutex
);
1909 mutex_unlock(&cfg80211_mutex
);
1911 REG_DBG_PRINT("Kicking the queue\n");
1913 schedule_work(®_work
);
1916 void regulatory_hint_disconnect(void)
1918 REG_DBG_PRINT("All devices are disconnected, going to restore regulatory settings\n");
1919 restore_regulatory_settings(false);
1922 static bool freq_is_chan_12_13_14(u16 freq
)
1924 if (freq
== ieee80211_channel_to_frequency(12, IEEE80211_BAND_2GHZ
) ||
1925 freq
== ieee80211_channel_to_frequency(13, IEEE80211_BAND_2GHZ
) ||
1926 freq
== ieee80211_channel_to_frequency(14, IEEE80211_BAND_2GHZ
))
1931 int regulatory_hint_found_beacon(struct wiphy
*wiphy
,
1932 struct ieee80211_channel
*beacon_chan
,
1935 struct reg_beacon
*reg_beacon
;
1937 if (beacon_chan
->beacon_found
||
1938 beacon_chan
->flags
& IEEE80211_CHAN_RADAR
||
1939 (beacon_chan
->band
== IEEE80211_BAND_2GHZ
&&
1940 !freq_is_chan_12_13_14(beacon_chan
->center_freq
)))
1943 reg_beacon
= kzalloc(sizeof(struct reg_beacon
), gfp
);
1947 REG_DBG_PRINT("Found new beacon on frequency: %d MHz (Ch %d) on %s\n",
1948 beacon_chan
->center_freq
,
1949 ieee80211_frequency_to_channel(beacon_chan
->center_freq
),
1952 memcpy(®_beacon
->chan
, beacon_chan
,
1953 sizeof(struct ieee80211_channel
));
1956 * Since we can be called from BH or and non-BH context
1957 * we must use spin_lock_bh()
1959 spin_lock_bh(®_pending_beacons_lock
);
1960 list_add_tail(®_beacon
->list
, ®_pending_beacons
);
1961 spin_unlock_bh(®_pending_beacons_lock
);
1963 schedule_work(®_work
);
1968 static void print_rd_rules(const struct ieee80211_regdomain
*rd
)
1971 const struct ieee80211_reg_rule
*reg_rule
= NULL
;
1972 const struct ieee80211_freq_range
*freq_range
= NULL
;
1973 const struct ieee80211_power_rule
*power_rule
= NULL
;
1975 pr_info(" (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)\n");
1977 for (i
= 0; i
< rd
->n_reg_rules
; i
++) {
1978 reg_rule
= &rd
->reg_rules
[i
];
1979 freq_range
= ®_rule
->freq_range
;
1980 power_rule
= ®_rule
->power_rule
;
1983 * There may not be documentation for max antenna gain
1984 * in certain regions
1986 if (power_rule
->max_antenna_gain
)
1987 pr_info(" (%d KHz - %d KHz @ %d KHz), (%d mBi, %d mBm)\n",
1988 freq_range
->start_freq_khz
,
1989 freq_range
->end_freq_khz
,
1990 freq_range
->max_bandwidth_khz
,
1991 power_rule
->max_antenna_gain
,
1992 power_rule
->max_eirp
);
1994 pr_info(" (%d KHz - %d KHz @ %d KHz), (N/A, %d mBm)\n",
1995 freq_range
->start_freq_khz
,
1996 freq_range
->end_freq_khz
,
1997 freq_range
->max_bandwidth_khz
,
1998 power_rule
->max_eirp
);
2002 bool reg_supported_dfs_region(u8 dfs_region
)
2004 switch (dfs_region
) {
2005 case NL80211_DFS_UNSET
:
2006 case NL80211_DFS_FCC
:
2007 case NL80211_DFS_ETSI
:
2008 case NL80211_DFS_JP
:
2011 REG_DBG_PRINT("Ignoring uknown DFS master region: %d\n",
2017 static void print_dfs_region(u8 dfs_region
)
2022 switch (dfs_region
) {
2023 case NL80211_DFS_FCC
:
2024 pr_info(" DFS Master region FCC");
2026 case NL80211_DFS_ETSI
:
2027 pr_info(" DFS Master region ETSI");
2029 case NL80211_DFS_JP
:
2030 pr_info(" DFS Master region JP");
2033 pr_info(" DFS Master region Unknown");
2038 static void print_regdomain(const struct ieee80211_regdomain
*rd
)
2041 if (is_intersected_alpha2(rd
->alpha2
)) {
2042 if (last_request
->initiator
==
2043 NL80211_REGDOM_SET_BY_COUNTRY_IE
) {
2044 struct cfg80211_registered_device
*rdev
;
2045 rdev
= cfg80211_rdev_by_wiphy_idx(
2046 last_request
->wiphy_idx
);
2048 pr_info("Current regulatory domain updated by AP to: %c%c\n",
2049 rdev
->country_ie_alpha2
[0],
2050 rdev
->country_ie_alpha2
[1]);
2052 pr_info("Current regulatory domain intersected:\n");
2054 pr_info("Current regulatory domain intersected:\n");
2055 } else if (is_world_regdom(rd
->alpha2
)) {
2056 pr_info("World regulatory domain updated:\n");
2058 if (is_unknown_alpha2(rd
->alpha2
))
2059 pr_info("Regulatory domain changed to driver built-in settings (unknown country)\n");
2061 if (reg_request_cell_base(last_request
))
2062 pr_info("Regulatory domain changed to country: %c%c by Cell Station\n",
2063 rd
->alpha2
[0], rd
->alpha2
[1]);
2065 pr_info("Regulatory domain changed to country: %c%c\n",
2066 rd
->alpha2
[0], rd
->alpha2
[1]);
2070 print_dfs_region(rd
->dfs_region
);
2074 static void print_regdomain_info(const struct ieee80211_regdomain
*rd
)
2076 pr_info("Regulatory domain: %c%c\n", rd
->alpha2
[0], rd
->alpha2
[1]);
2080 /* Takes ownership of rd only if it doesn't fail */
2081 static int __set_regdom(const struct ieee80211_regdomain
*rd
)
2083 const struct ieee80211_regdomain
*regd
;
2084 const struct ieee80211_regdomain
*intersected_rd
= NULL
;
2085 struct wiphy
*request_wiphy
;
2086 /* Some basic sanity checks first */
2088 if (is_world_regdom(rd
->alpha2
)) {
2089 if (WARN_ON(!reg_is_valid_request(rd
->alpha2
)))
2091 update_world_regdomain(rd
);
2095 if (!is_alpha2_set(rd
->alpha2
) && !is_an_alpha2(rd
->alpha2
) &&
2096 !is_unknown_alpha2(rd
->alpha2
))
2103 * Lets only bother proceeding on the same alpha2 if the current
2104 * rd is non static (it means CRDA was present and was used last)
2105 * and the pending request came in from a country IE
2107 if (last_request
->initiator
!= NL80211_REGDOM_SET_BY_COUNTRY_IE
) {
2109 * If someone else asked us to change the rd lets only bother
2110 * checking if the alpha2 changes if CRDA was already called
2112 if (!regdom_changes(rd
->alpha2
))
2117 * Now lets set the regulatory domain, update all driver channels
2118 * and finally inform them of what we have done, in case they want
2119 * to review or adjust their own settings based on their own
2120 * internal EEPROM data
2123 if (WARN_ON(!reg_is_valid_request(rd
->alpha2
)))
2126 if (!is_valid_rd(rd
)) {
2127 pr_err("Invalid regulatory domain detected:\n");
2128 print_regdomain_info(rd
);
2132 request_wiphy
= wiphy_idx_to_wiphy(last_request
->wiphy_idx
);
2133 if (!request_wiphy
&&
2134 (last_request
->initiator
== NL80211_REGDOM_SET_BY_DRIVER
||
2135 last_request
->initiator
== NL80211_REGDOM_SET_BY_COUNTRY_IE
)) {
2136 schedule_delayed_work(®_timeout
, 0);
2140 if (!last_request
->intersect
) {
2141 if (last_request
->initiator
!= NL80211_REGDOM_SET_BY_DRIVER
) {
2142 reset_regdomains(false);
2143 cfg80211_regdomain
= rd
;
2148 * For a driver hint, lets copy the regulatory domain the
2149 * driver wanted to the wiphy to deal with conflicts
2153 * Userspace could have sent two replies with only
2154 * one kernel request.
2156 if (request_wiphy
->regd
)
2159 regd
= reg_copy_regd(rd
);
2161 return PTR_ERR(regd
);
2163 request_wiphy
->regd
= regd
;
2164 reset_regdomains(false);
2165 cfg80211_regdomain
= rd
;
2169 /* Intersection requires a bit more work */
2171 if (last_request
->initiator
!= NL80211_REGDOM_SET_BY_COUNTRY_IE
) {
2172 intersected_rd
= regdom_intersect(rd
, cfg80211_regdomain
);
2173 if (!intersected_rd
)
2177 * We can trash what CRDA provided now.
2178 * However if a driver requested this specific regulatory
2179 * domain we keep it for its private use
2181 if (last_request
->initiator
== NL80211_REGDOM_SET_BY_DRIVER
)
2182 request_wiphy
->regd
= rd
;
2188 reset_regdomains(false);
2189 cfg80211_regdomain
= intersected_rd
;
2199 * Use this call to set the current regulatory domain. Conflicts with
2200 * multiple drivers can be ironed out later. Caller must've already
2201 * kmalloc'd the rd structure. Caller must hold cfg80211_mutex
2203 int set_regdom(const struct ieee80211_regdomain
*rd
)
2207 assert_cfg80211_lock();
2209 mutex_lock(®_mutex
);
2211 /* Note that this doesn't update the wiphys, this is done below */
2212 r
= __set_regdom(rd
);
2215 reg_set_request_processed();
2221 /* This would make this whole thing pointless */
2222 if (WARN_ON(!last_request
->intersect
&& rd
!= cfg80211_regdomain
)) {
2227 /* update all wiphys now with the new established regulatory domain */
2228 update_all_wiphy_regulatory(last_request
->initiator
);
2230 print_regdomain(cfg80211_regdomain
);
2232 nl80211_send_reg_change_event(last_request
);
2234 reg_set_request_processed();
2237 mutex_unlock(®_mutex
);
2242 #ifdef CONFIG_HOTPLUG
2243 int reg_device_uevent(struct device
*dev
, struct kobj_uevent_env
*env
)
2245 if (last_request
&& !last_request
->processed
) {
2246 if (add_uevent_var(env
, "COUNTRY=%c%c",
2247 last_request
->alpha2
[0],
2248 last_request
->alpha2
[1]))
2255 int reg_device_uevent(struct device
*dev
, struct kobj_uevent_env
*env
)
2259 #endif /* CONFIG_HOTPLUG */
2261 void wiphy_regulatory_register(struct wiphy
*wiphy
)
2263 assert_cfg80211_lock();
2265 mutex_lock(®_mutex
);
2267 if (!reg_dev_ignore_cell_hint(wiphy
))
2268 reg_num_devs_support_basehint
++;
2270 wiphy_update_regulatory(wiphy
, NL80211_REGDOM_SET_BY_CORE
);
2272 mutex_unlock(®_mutex
);
2275 /* Caller must hold cfg80211_mutex */
2276 void wiphy_regulatory_deregister(struct wiphy
*wiphy
)
2278 struct wiphy
*request_wiphy
= NULL
;
2280 assert_cfg80211_lock();
2282 mutex_lock(®_mutex
);
2284 if (!reg_dev_ignore_cell_hint(wiphy
))
2285 reg_num_devs_support_basehint
--;
2290 request_wiphy
= wiphy_idx_to_wiphy(last_request
->wiphy_idx
);
2292 if (!request_wiphy
|| request_wiphy
!= wiphy
)
2295 last_request
->wiphy_idx
= WIPHY_IDX_INVALID
;
2296 last_request
->country_ie_env
= ENVIRON_ANY
;
2298 mutex_unlock(®_mutex
);
2301 static void reg_timeout_work(struct work_struct
*work
)
2303 REG_DBG_PRINT("Timeout while waiting for CRDA to reply, restoring regulatory settings\n");
2304 restore_regulatory_settings(true);
2307 int __init
regulatory_init(void)
2311 reg_pdev
= platform_device_register_simple("regulatory", 0, NULL
, 0);
2312 if (IS_ERR(reg_pdev
))
2313 return PTR_ERR(reg_pdev
);
2315 reg_pdev
->dev
.type
= ®_device_type
;
2317 spin_lock_init(®_requests_lock
);
2318 spin_lock_init(®_pending_beacons_lock
);
2320 reg_regdb_size_check();
2322 cfg80211_regdomain
= cfg80211_world_regdom
;
2324 user_alpha2
[0] = '9';
2325 user_alpha2
[1] = '7';
2327 /* We always try to get an update for the static regdomain */
2328 err
= regulatory_hint_core(cfg80211_regdomain
->alpha2
);
2333 * N.B. kobject_uevent_env() can fail mainly for when we're out
2334 * memory which is handled and propagated appropriately above
2335 * but it can also fail during a netlink_broadcast() or during
2336 * early boot for call_usermodehelper(). For now treat these
2337 * errors as non-fatal.
2339 pr_err("kobject_uevent_env() was unable to call CRDA during init\n");
2340 #ifdef CONFIG_CFG80211_REG_DEBUG
2341 /* We want to find out exactly why when debugging */
2347 * Finally, if the user set the module parameter treat it
2350 if (!is_world_regdom(ieee80211_regdom
))
2351 regulatory_hint_user(ieee80211_regdom
,
2352 NL80211_USER_REG_HINT_USER
);
2357 void regulatory_exit(void)
2359 struct regulatory_request
*reg_request
, *tmp
;
2360 struct reg_beacon
*reg_beacon
, *btmp
;
2362 cancel_work_sync(®_work
);
2363 cancel_delayed_work_sync(®_timeout
);
2365 /* Lock to suppress warnings */
2366 mutex_lock(&cfg80211_mutex
);
2367 mutex_lock(®_mutex
);
2368 reset_regdomains(true);
2369 mutex_unlock(&cfg80211_mutex
);
2370 mutex_unlock(®_mutex
);
2372 dev_set_uevent_suppress(®_pdev
->dev
, true);
2374 platform_device_unregister(reg_pdev
);
2376 list_for_each_entry_safe(reg_beacon
, btmp
, ®_pending_beacons
, list
) {
2377 list_del(®_beacon
->list
);
2381 list_for_each_entry_safe(reg_beacon
, btmp
, ®_beacon_list
, list
) {
2382 list_del(®_beacon
->list
);
2386 list_for_each_entry_safe(reg_request
, tmp
, ®_requests_list
, list
) {
2387 list_del(®_request
->list
);