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 BUG_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 enum ieee80211_band band
,
808 unsigned int chan_idx
)
811 u32 flags
, bw_flags
= 0;
812 u32 desired_bw_khz
= MHZ_TO_KHZ(20);
813 const struct ieee80211_reg_rule
*reg_rule
= NULL
;
814 const struct ieee80211_power_rule
*power_rule
= NULL
;
815 const struct ieee80211_freq_range
*freq_range
= NULL
;
816 struct ieee80211_supported_band
*sband
;
817 struct ieee80211_channel
*chan
;
818 struct wiphy
*request_wiphy
= NULL
;
820 assert_cfg80211_lock();
822 request_wiphy
= wiphy_idx_to_wiphy(last_request
->wiphy_idx
);
824 sband
= wiphy
->bands
[band
];
825 BUG_ON(chan_idx
>= sband
->n_channels
);
826 chan
= &sband
->channels
[chan_idx
];
828 flags
= chan
->orig_flags
;
830 r
= freq_reg_info(wiphy
, MHZ_TO_KHZ(chan
->center_freq
),
831 desired_bw_khz
, ®_rule
);
834 * We will disable all channels that do not match our
835 * received regulatory rule unless the hint is coming
836 * from a Country IE and the Country IE had no information
837 * about a band. The IEEE 802.11 spec allows for an AP
838 * to send only a subset of the regulatory rules allowed,
839 * so an AP in the US that only supports 2.4 GHz may only send
840 * a country IE with information for the 2.4 GHz band
841 * while 5 GHz is still supported.
843 if (initiator
== NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
847 REG_DBG_PRINT("Disabling freq %d MHz\n", chan
->center_freq
);
848 chan
->flags
= IEEE80211_CHAN_DISABLED
;
852 chan_reg_rule_print_dbg(chan
, desired_bw_khz
, reg_rule
);
854 power_rule
= ®_rule
->power_rule
;
855 freq_range
= ®_rule
->freq_range
;
857 if (freq_range
->max_bandwidth_khz
< MHZ_TO_KHZ(40))
858 bw_flags
= IEEE80211_CHAN_NO_HT40
;
860 if (last_request
->initiator
== NL80211_REGDOM_SET_BY_DRIVER
&&
861 request_wiphy
&& request_wiphy
== wiphy
&&
862 request_wiphy
->flags
& WIPHY_FLAG_STRICT_REGULATORY
) {
864 * This guarantees the driver's requested regulatory domain
865 * will always be used as a base for further regulatory
868 chan
->flags
= chan
->orig_flags
=
869 map_regdom_flags(reg_rule
->flags
) | bw_flags
;
870 chan
->max_antenna_gain
= chan
->orig_mag
=
871 (int) MBI_TO_DBI(power_rule
->max_antenna_gain
);
872 chan
->max_reg_power
= chan
->max_power
= chan
->orig_mpwr
=
873 (int) MBM_TO_DBM(power_rule
->max_eirp
);
877 chan
->beacon_found
= false;
878 chan
->flags
= flags
| bw_flags
| map_regdom_flags(reg_rule
->flags
);
879 chan
->max_antenna_gain
=
880 min_t(int, chan
->orig_mag
,
881 MBI_TO_DBI(power_rule
->max_antenna_gain
));
882 chan
->max_reg_power
= (int) MBM_TO_DBM(power_rule
->max_eirp
);
883 if (chan
->orig_mpwr
) {
885 * Devices that have their own custom regulatory domain
886 * but also use WIPHY_FLAG_STRICT_REGULATORY will follow the
887 * passed country IE power settings.
889 if (initiator
== NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
890 wiphy
->flags
& WIPHY_FLAG_CUSTOM_REGULATORY
&&
891 wiphy
->flags
& WIPHY_FLAG_STRICT_REGULATORY
)
892 chan
->max_power
= chan
->max_reg_power
;
894 chan
->max_power
= min(chan
->orig_mpwr
,
895 chan
->max_reg_power
);
897 chan
->max_power
= chan
->max_reg_power
;
900 static void handle_band(struct wiphy
*wiphy
, enum ieee80211_band band
,
901 enum nl80211_reg_initiator initiator
)
904 struct ieee80211_supported_band
*sband
;
906 BUG_ON(!wiphy
->bands
[band
]);
907 sband
= wiphy
->bands
[band
];
909 for (i
= 0; i
< sband
->n_channels
; i
++)
910 handle_channel(wiphy
, initiator
, band
, i
);
913 static bool reg_request_cell_base(struct regulatory_request
*request
)
915 if (request
->initiator
!= NL80211_REGDOM_SET_BY_USER
)
917 return request
->user_reg_hint_type
== NL80211_USER_REG_HINT_CELL_BASE
;
920 bool reg_last_request_cell_base(void)
924 assert_cfg80211_lock();
926 mutex_lock(®_mutex
);
927 val
= reg_request_cell_base(last_request
);
928 mutex_unlock(®_mutex
);
933 #ifdef CONFIG_CFG80211_CERTIFICATION_ONUS
934 /* Core specific check */
935 static enum reg_request_treatment
936 reg_ignore_cell_hint(struct regulatory_request
*pending_request
)
938 if (!reg_num_devs_support_basehint
)
939 return REG_REQ_IGNORE
;
941 if (reg_request_cell_base(last_request
) &&
942 !regdom_changes(pending_request
->alpha2
))
943 return REG_REQ_ALREADY_SET
;
948 /* Device specific check */
949 static bool reg_dev_ignore_cell_hint(struct wiphy
*wiphy
)
951 return !(wiphy
->features
& NL80211_FEATURE_CELL_BASE_REG_HINTS
);
954 static int reg_ignore_cell_hint(struct regulatory_request
*pending_request
)
956 return REG_REQ_IGNORE
;
959 static bool reg_dev_ignore_cell_hint(struct wiphy
*wiphy
)
966 static bool ignore_reg_update(struct wiphy
*wiphy
,
967 enum nl80211_reg_initiator initiator
)
970 REG_DBG_PRINT("Ignoring regulatory request %s since last_request is not set\n",
971 reg_initiator_name(initiator
));
975 if (initiator
== NL80211_REGDOM_SET_BY_CORE
&&
976 wiphy
->flags
& WIPHY_FLAG_CUSTOM_REGULATORY
) {
977 REG_DBG_PRINT("Ignoring regulatory request %s since the driver uses its own custom regulatory domain\n",
978 reg_initiator_name(initiator
));
983 * wiphy->regd will be set once the device has its own
984 * desired regulatory domain set
986 if (wiphy
->flags
& WIPHY_FLAG_STRICT_REGULATORY
&& !wiphy
->regd
&&
987 initiator
!= NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
988 !is_world_regdom(last_request
->alpha2
)) {
989 REG_DBG_PRINT("Ignoring regulatory request %s since the driver requires its own regulatory domain to be set first\n",
990 reg_initiator_name(initiator
));
994 if (reg_request_cell_base(last_request
))
995 return reg_dev_ignore_cell_hint(wiphy
);
1000 static void handle_reg_beacon(struct wiphy
*wiphy
, unsigned int chan_idx
,
1001 struct reg_beacon
*reg_beacon
)
1003 struct ieee80211_supported_band
*sband
;
1004 struct ieee80211_channel
*chan
;
1005 bool channel_changed
= false;
1006 struct ieee80211_channel chan_before
;
1008 assert_cfg80211_lock();
1010 sband
= wiphy
->bands
[reg_beacon
->chan
.band
];
1011 chan
= &sband
->channels
[chan_idx
];
1013 if (likely(chan
->center_freq
!= reg_beacon
->chan
.center_freq
))
1016 if (chan
->beacon_found
)
1019 chan
->beacon_found
= true;
1021 if (wiphy
->flags
& WIPHY_FLAG_DISABLE_BEACON_HINTS
)
1024 chan_before
.center_freq
= chan
->center_freq
;
1025 chan_before
.flags
= chan
->flags
;
1027 if (chan
->flags
& IEEE80211_CHAN_PASSIVE_SCAN
) {
1028 chan
->flags
&= ~IEEE80211_CHAN_PASSIVE_SCAN
;
1029 channel_changed
= true;
1032 if (chan
->flags
& IEEE80211_CHAN_NO_IBSS
) {
1033 chan
->flags
&= ~IEEE80211_CHAN_NO_IBSS
;
1034 channel_changed
= true;
1037 if (channel_changed
)
1038 nl80211_send_beacon_hint_event(wiphy
, &chan_before
, chan
);
1042 * Called when a scan on a wiphy finds a beacon on
1045 static void wiphy_update_new_beacon(struct wiphy
*wiphy
,
1046 struct reg_beacon
*reg_beacon
)
1049 struct ieee80211_supported_band
*sband
;
1051 assert_cfg80211_lock();
1053 if (!wiphy
->bands
[reg_beacon
->chan
.band
])
1056 sband
= wiphy
->bands
[reg_beacon
->chan
.band
];
1058 for (i
= 0; i
< sband
->n_channels
; i
++)
1059 handle_reg_beacon(wiphy
, i
, reg_beacon
);
1063 * Called upon reg changes or a new wiphy is added
1065 static void wiphy_update_beacon_reg(struct wiphy
*wiphy
)
1068 struct ieee80211_supported_band
*sband
;
1069 struct reg_beacon
*reg_beacon
;
1071 assert_cfg80211_lock();
1073 list_for_each_entry(reg_beacon
, ®_beacon_list
, list
) {
1074 if (!wiphy
->bands
[reg_beacon
->chan
.band
])
1076 sband
= wiphy
->bands
[reg_beacon
->chan
.band
];
1077 for (i
= 0; i
< sband
->n_channels
; i
++)
1078 handle_reg_beacon(wiphy
, i
, reg_beacon
);
1082 static bool reg_is_world_roaming(struct wiphy
*wiphy
)
1084 if (is_world_regdom(cfg80211_regdomain
->alpha2
) ||
1085 (wiphy
->regd
&& is_world_regdom(wiphy
->regd
->alpha2
)))
1088 last_request
->initiator
!= NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
1089 wiphy
->flags
& WIPHY_FLAG_CUSTOM_REGULATORY
)
1094 /* Reap the advantages of previously found beacons */
1095 static void reg_process_beacons(struct wiphy
*wiphy
)
1098 * Means we are just firing up cfg80211, so no beacons would
1099 * have been processed yet.
1103 if (!reg_is_world_roaming(wiphy
))
1105 wiphy_update_beacon_reg(wiphy
);
1108 static bool is_ht40_allowed(struct ieee80211_channel
*chan
)
1112 if (chan
->flags
& IEEE80211_CHAN_DISABLED
)
1114 /* This would happen when regulatory rules disallow HT40 completely */
1115 return !(chan
->flags
& IEEE80211_CHAN_NO_HT40
);
1118 static void reg_process_ht_flags_channel(struct wiphy
*wiphy
,
1119 enum ieee80211_band band
,
1120 unsigned int chan_idx
)
1122 struct ieee80211_supported_band
*sband
;
1123 struct ieee80211_channel
*channel
;
1124 struct ieee80211_channel
*channel_before
= NULL
, *channel_after
= NULL
;
1127 assert_cfg80211_lock();
1129 sband
= wiphy
->bands
[band
];
1130 BUG_ON(chan_idx
>= sband
->n_channels
);
1131 channel
= &sband
->channels
[chan_idx
];
1133 if (!is_ht40_allowed(channel
)) {
1134 channel
->flags
|= IEEE80211_CHAN_NO_HT40
;
1139 * We need to ensure the extension channels exist to
1140 * be able to use HT40- or HT40+, this finds them (or not)
1142 for (i
= 0; i
< sband
->n_channels
; i
++) {
1143 struct ieee80211_channel
*c
= &sband
->channels
[i
];
1145 if (c
->center_freq
== (channel
->center_freq
- 20))
1147 if (c
->center_freq
== (channel
->center_freq
+ 20))
1152 * Please note that this assumes target bandwidth is 20 MHz,
1153 * if that ever changes we also need to change the below logic
1154 * to include that as well.
1156 if (!is_ht40_allowed(channel_before
))
1157 channel
->flags
|= IEEE80211_CHAN_NO_HT40MINUS
;
1159 channel
->flags
&= ~IEEE80211_CHAN_NO_HT40MINUS
;
1161 if (!is_ht40_allowed(channel_after
))
1162 channel
->flags
|= IEEE80211_CHAN_NO_HT40PLUS
;
1164 channel
->flags
&= ~IEEE80211_CHAN_NO_HT40PLUS
;
1167 static void reg_process_ht_flags_band(struct wiphy
*wiphy
,
1168 enum ieee80211_band band
)
1171 struct ieee80211_supported_band
*sband
;
1173 BUG_ON(!wiphy
->bands
[band
]);
1174 sband
= wiphy
->bands
[band
];
1176 for (i
= 0; i
< sband
->n_channels
; i
++)
1177 reg_process_ht_flags_channel(wiphy
, band
, i
);
1180 static void reg_process_ht_flags(struct wiphy
*wiphy
)
1182 enum ieee80211_band band
;
1187 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++) {
1188 if (wiphy
->bands
[band
])
1189 reg_process_ht_flags_band(wiphy
, band
);
1194 static void wiphy_update_regulatory(struct wiphy
*wiphy
,
1195 enum nl80211_reg_initiator initiator
)
1197 enum ieee80211_band band
;
1201 if (ignore_reg_update(wiphy
, initiator
))
1204 last_request
->dfs_region
= cfg80211_regdomain
->dfs_region
;
1206 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++) {
1207 if (wiphy
->bands
[band
])
1208 handle_band(wiphy
, band
, initiator
);
1211 reg_process_beacons(wiphy
);
1212 reg_process_ht_flags(wiphy
);
1214 if (wiphy
->reg_notifier
)
1215 wiphy
->reg_notifier(wiphy
, last_request
);
1218 static void update_all_wiphy_regulatory(enum nl80211_reg_initiator initiator
)
1220 struct cfg80211_registered_device
*rdev
;
1221 struct wiphy
*wiphy
;
1223 list_for_each_entry(rdev
, &cfg80211_rdev_list
, list
) {
1224 wiphy
= &rdev
->wiphy
;
1225 wiphy_update_regulatory(wiphy
, initiator
);
1227 * Regulatory updates set by CORE are ignored for custom
1228 * regulatory cards. Let us notify the changes to the driver,
1229 * as some drivers used this to restore its orig_* reg domain.
1231 if (initiator
== NL80211_REGDOM_SET_BY_CORE
&&
1232 wiphy
->flags
& WIPHY_FLAG_CUSTOM_REGULATORY
&&
1233 wiphy
->reg_notifier
)
1234 wiphy
->reg_notifier(wiphy
, last_request
);
1238 static void handle_channel_custom(struct wiphy
*wiphy
,
1239 enum ieee80211_band band
,
1240 unsigned int chan_idx
,
1241 const struct ieee80211_regdomain
*regd
)
1244 u32 desired_bw_khz
= MHZ_TO_KHZ(20);
1246 const struct ieee80211_reg_rule
*reg_rule
= NULL
;
1247 const struct ieee80211_power_rule
*power_rule
= NULL
;
1248 const struct ieee80211_freq_range
*freq_range
= NULL
;
1249 struct ieee80211_supported_band
*sband
;
1250 struct ieee80211_channel
*chan
;
1254 sband
= wiphy
->bands
[band
];
1255 BUG_ON(chan_idx
>= sband
->n_channels
);
1256 chan
= &sband
->channels
[chan_idx
];
1258 r
= freq_reg_info_regd(wiphy
, MHZ_TO_KHZ(chan
->center_freq
),
1259 desired_bw_khz
, ®_rule
, regd
);
1262 REG_DBG_PRINT("Disabling freq %d MHz as custom regd has no rule that fits a %d MHz wide channel\n",
1263 chan
->center_freq
, KHZ_TO_MHZ(desired_bw_khz
));
1264 chan
->flags
= IEEE80211_CHAN_DISABLED
;
1268 chan_reg_rule_print_dbg(chan
, desired_bw_khz
, reg_rule
);
1270 power_rule
= ®_rule
->power_rule
;
1271 freq_range
= ®_rule
->freq_range
;
1273 if (freq_range
->max_bandwidth_khz
< MHZ_TO_KHZ(40))
1274 bw_flags
= IEEE80211_CHAN_NO_HT40
;
1276 chan
->flags
|= map_regdom_flags(reg_rule
->flags
) | bw_flags
;
1277 chan
->max_antenna_gain
= (int) MBI_TO_DBI(power_rule
->max_antenna_gain
);
1278 chan
->max_reg_power
= chan
->max_power
=
1279 (int) MBM_TO_DBM(power_rule
->max_eirp
);
1282 static void handle_band_custom(struct wiphy
*wiphy
, enum ieee80211_band band
,
1283 const struct ieee80211_regdomain
*regd
)
1286 struct ieee80211_supported_band
*sband
;
1288 BUG_ON(!wiphy
->bands
[band
]);
1289 sband
= wiphy
->bands
[band
];
1291 for (i
= 0; i
< sband
->n_channels
; i
++)
1292 handle_channel_custom(wiphy
, band
, i
, regd
);
1295 /* Used by drivers prior to wiphy registration */
1296 void wiphy_apply_custom_regulatory(struct wiphy
*wiphy
,
1297 const struct ieee80211_regdomain
*regd
)
1299 enum ieee80211_band band
;
1300 unsigned int bands_set
= 0;
1302 mutex_lock(®_mutex
);
1303 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++) {
1304 if (!wiphy
->bands
[band
])
1306 handle_band_custom(wiphy
, band
, regd
);
1309 mutex_unlock(®_mutex
);
1312 * no point in calling this if it won't have any effect
1313 * on your device's supported bands.
1315 WARN_ON(!bands_set
);
1317 EXPORT_SYMBOL(wiphy_apply_custom_regulatory
);
1319 /* This has the logic which determines when a new request
1320 * should be ignored. */
1321 static enum reg_request_treatment
1322 get_reg_request_treatment(struct wiphy
*wiphy
,
1323 struct regulatory_request
*pending_request
)
1325 struct wiphy
*last_wiphy
= NULL
;
1327 assert_cfg80211_lock();
1329 /* All initial requests are respected */
1333 switch (pending_request
->initiator
) {
1334 case NL80211_REGDOM_SET_BY_CORE
:
1336 case NL80211_REGDOM_SET_BY_COUNTRY_IE
:
1337 if (reg_request_cell_base(last_request
)) {
1338 /* Trust a Cell base station over the AP's country IE */
1339 if (regdom_changes(pending_request
->alpha2
))
1340 return REG_REQ_IGNORE
;
1341 return REG_REQ_ALREADY_SET
;
1344 last_wiphy
= wiphy_idx_to_wiphy(last_request
->wiphy_idx
);
1346 if (unlikely(!is_an_alpha2(pending_request
->alpha2
)))
1348 if (last_request
->initiator
==
1349 NL80211_REGDOM_SET_BY_COUNTRY_IE
) {
1350 if (last_wiphy
!= wiphy
) {
1352 * Two cards with two APs claiming different
1353 * Country IE alpha2s. We could
1354 * intersect them, but that seems unlikely
1355 * to be correct. Reject second one for now.
1357 if (regdom_changes(pending_request
->alpha2
))
1358 return REG_REQ_IGNORE
;
1359 return REG_REQ_ALREADY_SET
;
1362 * Two consecutive Country IE hints on the same wiphy.
1363 * This should be picked up early by the driver/stack
1365 if (WARN_ON(regdom_changes(pending_request
->alpha2
)))
1367 return REG_REQ_ALREADY_SET
;
1370 case NL80211_REGDOM_SET_BY_DRIVER
:
1371 if (last_request
->initiator
== NL80211_REGDOM_SET_BY_CORE
) {
1372 if (regdom_changes(pending_request
->alpha2
))
1374 return REG_REQ_ALREADY_SET
;
1378 * This would happen if you unplug and plug your card
1379 * back in or if you add a new device for which the previously
1380 * loaded card also agrees on the regulatory domain.
1382 if (last_request
->initiator
== NL80211_REGDOM_SET_BY_DRIVER
&&
1383 !regdom_changes(pending_request
->alpha2
))
1384 return REG_REQ_ALREADY_SET
;
1386 return REG_REQ_INTERSECT
;
1387 case NL80211_REGDOM_SET_BY_USER
:
1388 if (reg_request_cell_base(pending_request
))
1389 return reg_ignore_cell_hint(pending_request
);
1391 if (reg_request_cell_base(last_request
))
1392 return REG_REQ_IGNORE
;
1394 if (last_request
->initiator
== NL80211_REGDOM_SET_BY_COUNTRY_IE
)
1395 return REG_REQ_INTERSECT
;
1397 * If the user knows better the user should set the regdom
1398 * to their country before the IE is picked up
1400 if (last_request
->initiator
== NL80211_REGDOM_SET_BY_USER
&&
1401 last_request
->intersect
)
1402 return REG_REQ_IGNORE
;
1404 * Process user requests only after previous user/driver/core
1405 * requests have been processed
1407 if ((last_request
->initiator
== NL80211_REGDOM_SET_BY_CORE
||
1408 last_request
->initiator
== NL80211_REGDOM_SET_BY_DRIVER
||
1409 last_request
->initiator
== NL80211_REGDOM_SET_BY_USER
) &&
1410 regdom_changes(last_request
->alpha2
))
1411 return REG_REQ_IGNORE
;
1413 if (!regdom_changes(pending_request
->alpha2
))
1414 return REG_REQ_ALREADY_SET
;
1419 return REG_REQ_IGNORE
;
1422 static void reg_set_request_processed(void)
1424 bool need_more_processing
= false;
1426 last_request
->processed
= true;
1428 spin_lock(®_requests_lock
);
1429 if (!list_empty(®_requests_list
))
1430 need_more_processing
= true;
1431 spin_unlock(®_requests_lock
);
1433 if (last_request
->initiator
== NL80211_REGDOM_SET_BY_USER
)
1434 cancel_delayed_work(®_timeout
);
1436 if (need_more_processing
)
1437 schedule_work(®_work
);
1441 * __regulatory_hint - hint to the wireless core a regulatory domain
1442 * @wiphy: if the hint comes from country information from an AP, this
1443 * is required to be set to the wiphy that received the information
1444 * @pending_request: the regulatory request currently being processed
1446 * The Wireless subsystem can use this function to hint to the wireless core
1447 * what it believes should be the current regulatory domain.
1449 * Returns one of the different reg request treatment values.
1451 * Caller must hold &cfg80211_mutex and ®_mutex
1453 static enum reg_request_treatment
1454 __regulatory_hint(struct wiphy
*wiphy
,
1455 struct regulatory_request
*pending_request
)
1457 const struct ieee80211_regdomain
*regd
;
1458 bool intersect
= false;
1459 enum reg_request_treatment treatment
;
1461 assert_cfg80211_lock();
1463 treatment
= get_reg_request_treatment(wiphy
, pending_request
);
1465 switch (treatment
) {
1466 case REG_REQ_INTERSECT
:
1467 if (pending_request
->initiator
==
1468 NL80211_REGDOM_SET_BY_DRIVER
) {
1469 regd
= reg_copy_regd(cfg80211_regdomain
);
1471 kfree(pending_request
);
1472 return PTR_ERR(regd
);
1482 * If the regulatory domain being requested by the
1483 * driver has already been set just copy it to the
1486 if (treatment
== REG_REQ_ALREADY_SET
&&
1487 pending_request
->initiator
== NL80211_REGDOM_SET_BY_DRIVER
) {
1488 regd
= reg_copy_regd(cfg80211_regdomain
);
1490 kfree(pending_request
);
1491 return REG_REQ_IGNORE
;
1493 treatment
= REG_REQ_ALREADY_SET
;
1497 kfree(pending_request
);
1502 if (last_request
!= &core_request_world
)
1503 kfree(last_request
);
1505 last_request
= pending_request
;
1506 last_request
->intersect
= intersect
;
1508 pending_request
= NULL
;
1510 if (last_request
->initiator
== NL80211_REGDOM_SET_BY_USER
) {
1511 user_alpha2
[0] = last_request
->alpha2
[0];
1512 user_alpha2
[1] = last_request
->alpha2
[1];
1515 /* When r == REG_REQ_INTERSECT we do need to call CRDA */
1516 if (treatment
!= REG_REQ_OK
&& treatment
!= REG_REQ_INTERSECT
) {
1518 * Since CRDA will not be called in this case as we already
1519 * have applied the requested regulatory domain before we just
1520 * inform userspace we have processed the request
1522 if (treatment
== REG_REQ_ALREADY_SET
) {
1523 nl80211_send_reg_change_event(last_request
);
1524 reg_set_request_processed();
1529 if (call_crda(last_request
->alpha2
))
1530 return REG_REQ_IGNORE
;
1534 /* This processes *all* regulatory hints */
1535 static void reg_process_hint(struct regulatory_request
*reg_request
,
1536 enum nl80211_reg_initiator reg_initiator
)
1538 struct wiphy
*wiphy
= NULL
;
1540 BUG_ON(!reg_request
->alpha2
);
1542 if (reg_request
->wiphy_idx
!= WIPHY_IDX_INVALID
)
1543 wiphy
= wiphy_idx_to_wiphy(reg_request
->wiphy_idx
);
1545 if (reg_initiator
== NL80211_REGDOM_SET_BY_DRIVER
&& !wiphy
) {
1550 switch (__regulatory_hint(wiphy
, reg_request
)) {
1551 case REG_REQ_ALREADY_SET
:
1552 /* This is required so that the orig_* parameters are saved */
1553 if (wiphy
&& wiphy
->flags
& WIPHY_FLAG_STRICT_REGULATORY
)
1554 wiphy_update_regulatory(wiphy
, reg_initiator
);
1557 if (reg_initiator
== NL80211_REGDOM_SET_BY_USER
)
1558 schedule_delayed_work(®_timeout
,
1559 msecs_to_jiffies(3142));
1565 * Processes regulatory hints, this is all the NL80211_REGDOM_SET_BY_*
1566 * Regulatory hints come on a first come first serve basis and we
1567 * must process each one atomically.
1569 static void reg_process_pending_hints(void)
1571 struct regulatory_request
*reg_request
;
1573 mutex_lock(&cfg80211_mutex
);
1574 mutex_lock(®_mutex
);
1576 /* When last_request->processed becomes true this will be rescheduled */
1577 if (last_request
&& !last_request
->processed
) {
1578 REG_DBG_PRINT("Pending regulatory request, waiting for it to be processed...\n");
1582 spin_lock(®_requests_lock
);
1584 if (list_empty(®_requests_list
)) {
1585 spin_unlock(®_requests_lock
);
1589 reg_request
= list_first_entry(®_requests_list
,
1590 struct regulatory_request
,
1592 list_del_init(®_request
->list
);
1594 spin_unlock(®_requests_lock
);
1596 reg_process_hint(reg_request
, reg_request
->initiator
);
1599 mutex_unlock(®_mutex
);
1600 mutex_unlock(&cfg80211_mutex
);
1603 /* Processes beacon hints -- this has nothing to do with country IEs */
1604 static void reg_process_pending_beacon_hints(void)
1606 struct cfg80211_registered_device
*rdev
;
1607 struct reg_beacon
*pending_beacon
, *tmp
;
1610 * No need to hold the reg_mutex here as we just touch wiphys
1611 * and do not read or access regulatory variables.
1613 mutex_lock(&cfg80211_mutex
);
1615 /* This goes through the _pending_ beacon list */
1616 spin_lock_bh(®_pending_beacons_lock
);
1618 list_for_each_entry_safe(pending_beacon
, tmp
,
1619 ®_pending_beacons
, list
) {
1620 list_del_init(&pending_beacon
->list
);
1622 /* Applies the beacon hint to current wiphys */
1623 list_for_each_entry(rdev
, &cfg80211_rdev_list
, list
)
1624 wiphy_update_new_beacon(&rdev
->wiphy
, pending_beacon
);
1626 /* Remembers the beacon hint for new wiphys or reg changes */
1627 list_add_tail(&pending_beacon
->list
, ®_beacon_list
);
1630 spin_unlock_bh(®_pending_beacons_lock
);
1631 mutex_unlock(&cfg80211_mutex
);
1634 static void reg_todo(struct work_struct
*work
)
1636 reg_process_pending_hints();
1637 reg_process_pending_beacon_hints();
1640 static void queue_regulatory_request(struct regulatory_request
*request
)
1642 if (isalpha(request
->alpha2
[0]))
1643 request
->alpha2
[0] = toupper(request
->alpha2
[0]);
1644 if (isalpha(request
->alpha2
[1]))
1645 request
->alpha2
[1] = toupper(request
->alpha2
[1]);
1647 spin_lock(®_requests_lock
);
1648 list_add_tail(&request
->list
, ®_requests_list
);
1649 spin_unlock(®_requests_lock
);
1651 schedule_work(®_work
);
1655 * Core regulatory hint -- happens during cfg80211_init()
1656 * and when we restore regulatory settings.
1658 static int regulatory_hint_core(const char *alpha2
)
1660 struct regulatory_request
*request
;
1662 request
= kzalloc(sizeof(struct regulatory_request
), GFP_KERNEL
);
1666 request
->alpha2
[0] = alpha2
[0];
1667 request
->alpha2
[1] = alpha2
[1];
1668 request
->initiator
= NL80211_REGDOM_SET_BY_CORE
;
1670 queue_regulatory_request(request
);
1676 int regulatory_hint_user(const char *alpha2
,
1677 enum nl80211_user_reg_hint_type user_reg_hint_type
)
1679 struct regulatory_request
*request
;
1683 request
= kzalloc(sizeof(struct regulatory_request
), GFP_KERNEL
);
1687 request
->wiphy_idx
= WIPHY_IDX_INVALID
;
1688 request
->alpha2
[0] = alpha2
[0];
1689 request
->alpha2
[1] = alpha2
[1];
1690 request
->initiator
= NL80211_REGDOM_SET_BY_USER
;
1691 request
->user_reg_hint_type
= user_reg_hint_type
;
1693 queue_regulatory_request(request
);
1699 int regulatory_hint(struct wiphy
*wiphy
, const char *alpha2
)
1701 struct regulatory_request
*request
;
1706 request
= kzalloc(sizeof(struct regulatory_request
), GFP_KERNEL
);
1710 request
->wiphy_idx
= get_wiphy_idx(wiphy
);
1712 request
->alpha2
[0] = alpha2
[0];
1713 request
->alpha2
[1] = alpha2
[1];
1714 request
->initiator
= NL80211_REGDOM_SET_BY_DRIVER
;
1716 queue_regulatory_request(request
);
1720 EXPORT_SYMBOL(regulatory_hint
);
1723 * We hold wdev_lock() here so we cannot hold cfg80211_mutex() and
1724 * therefore cannot iterate over the rdev list here.
1726 void regulatory_hint_11d(struct wiphy
*wiphy
, enum ieee80211_band band
,
1727 const u8
*country_ie
, u8 country_ie_len
)
1730 enum environment_cap env
= ENVIRON_ANY
;
1731 struct regulatory_request
*request
;
1733 mutex_lock(®_mutex
);
1735 if (unlikely(!last_request
))
1738 /* IE len must be evenly divisible by 2 */
1739 if (country_ie_len
& 0x01)
1742 if (country_ie_len
< IEEE80211_COUNTRY_IE_MIN_LEN
)
1745 alpha2
[0] = country_ie
[0];
1746 alpha2
[1] = country_ie
[1];
1748 if (country_ie
[2] == 'I')
1749 env
= ENVIRON_INDOOR
;
1750 else if (country_ie
[2] == 'O')
1751 env
= ENVIRON_OUTDOOR
;
1754 * We will run this only upon a successful connection on cfg80211.
1755 * We leave conflict resolution to the workqueue, where can hold
1758 if (last_request
->initiator
== NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
1759 last_request
->wiphy_idx
!= WIPHY_IDX_INVALID
)
1762 request
= kzalloc(sizeof(struct regulatory_request
), GFP_KERNEL
);
1766 request
->wiphy_idx
= get_wiphy_idx(wiphy
);
1767 request
->alpha2
[0] = alpha2
[0];
1768 request
->alpha2
[1] = alpha2
[1];
1769 request
->initiator
= NL80211_REGDOM_SET_BY_COUNTRY_IE
;
1770 request
->country_ie_env
= env
;
1772 queue_regulatory_request(request
);
1774 mutex_unlock(®_mutex
);
1777 static void restore_alpha2(char *alpha2
, bool reset_user
)
1779 /* indicates there is no alpha2 to consider for restoration */
1783 /* The user setting has precedence over the module parameter */
1784 if (is_user_regdom_saved()) {
1785 /* Unless we're asked to ignore it and reset it */
1787 REG_DBG_PRINT("Restoring regulatory settings including user preference\n");
1788 user_alpha2
[0] = '9';
1789 user_alpha2
[1] = '7';
1792 * If we're ignoring user settings, we still need to
1793 * check the module parameter to ensure we put things
1794 * back as they were for a full restore.
1796 if (!is_world_regdom(ieee80211_regdom
)) {
1797 REG_DBG_PRINT("Keeping preference on module parameter ieee80211_regdom: %c%c\n",
1798 ieee80211_regdom
[0], ieee80211_regdom
[1]);
1799 alpha2
[0] = ieee80211_regdom
[0];
1800 alpha2
[1] = ieee80211_regdom
[1];
1803 REG_DBG_PRINT("Restoring regulatory settings while preserving user preference for: %c%c\n",
1804 user_alpha2
[0], user_alpha2
[1]);
1805 alpha2
[0] = user_alpha2
[0];
1806 alpha2
[1] = user_alpha2
[1];
1808 } else if (!is_world_regdom(ieee80211_regdom
)) {
1809 REG_DBG_PRINT("Keeping preference on module parameter ieee80211_regdom: %c%c\n",
1810 ieee80211_regdom
[0], ieee80211_regdom
[1]);
1811 alpha2
[0] = ieee80211_regdom
[0];
1812 alpha2
[1] = ieee80211_regdom
[1];
1814 REG_DBG_PRINT("Restoring regulatory settings\n");
1817 static void restore_custom_reg_settings(struct wiphy
*wiphy
)
1819 struct ieee80211_supported_band
*sband
;
1820 enum ieee80211_band band
;
1821 struct ieee80211_channel
*chan
;
1824 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++) {
1825 sband
= wiphy
->bands
[band
];
1828 for (i
= 0; i
< sband
->n_channels
; i
++) {
1829 chan
= &sband
->channels
[i
];
1830 chan
->flags
= chan
->orig_flags
;
1831 chan
->max_antenna_gain
= chan
->orig_mag
;
1832 chan
->max_power
= chan
->orig_mpwr
;
1833 chan
->beacon_found
= false;
1839 * Restoring regulatory settings involves ingoring any
1840 * possibly stale country IE information and user regulatory
1841 * settings if so desired, this includes any beacon hints
1842 * learned as we could have traveled outside to another country
1843 * after disconnection. To restore regulatory settings we do
1844 * exactly what we did at bootup:
1846 * - send a core regulatory hint
1847 * - send a user regulatory hint if applicable
1849 * Device drivers that send a regulatory hint for a specific country
1850 * keep their own regulatory domain on wiphy->regd so that does does
1851 * not need to be remembered.
1853 static void restore_regulatory_settings(bool reset_user
)
1856 char world_alpha2
[2];
1857 struct reg_beacon
*reg_beacon
, *btmp
;
1858 struct regulatory_request
*reg_request
, *tmp
;
1859 LIST_HEAD(tmp_reg_req_list
);
1860 struct cfg80211_registered_device
*rdev
;
1862 mutex_lock(&cfg80211_mutex
);
1863 mutex_lock(®_mutex
);
1865 reset_regdomains(true);
1866 restore_alpha2(alpha2
, reset_user
);
1869 * If there's any pending requests we simply
1870 * stash them to a temporary pending queue and
1871 * add then after we've restored regulatory
1874 spin_lock(®_requests_lock
);
1875 list_for_each_entry_safe(reg_request
, tmp
, ®_requests_list
, list
) {
1876 if (reg_request
->initiator
!= NL80211_REGDOM_SET_BY_USER
)
1878 list_move_tail(®_request
->list
, &tmp_reg_req_list
);
1880 spin_unlock(®_requests_lock
);
1882 /* Clear beacon hints */
1883 spin_lock_bh(®_pending_beacons_lock
);
1884 list_for_each_entry_safe(reg_beacon
, btmp
, ®_pending_beacons
, list
) {
1885 list_del(®_beacon
->list
);
1888 spin_unlock_bh(®_pending_beacons_lock
);
1890 list_for_each_entry_safe(reg_beacon
, btmp
, ®_beacon_list
, list
) {
1891 list_del(®_beacon
->list
);
1895 /* First restore to the basic regulatory settings */
1896 cfg80211_regdomain
= cfg80211_world_regdom
;
1897 world_alpha2
[0] = cfg80211_regdomain
->alpha2
[0];
1898 world_alpha2
[1] = cfg80211_regdomain
->alpha2
[1];
1900 list_for_each_entry(rdev
, &cfg80211_rdev_list
, list
) {
1901 if (rdev
->wiphy
.flags
& WIPHY_FLAG_CUSTOM_REGULATORY
)
1902 restore_custom_reg_settings(&rdev
->wiphy
);
1905 mutex_unlock(®_mutex
);
1906 mutex_unlock(&cfg80211_mutex
);
1908 regulatory_hint_core(world_alpha2
);
1911 * This restores the ieee80211_regdom module parameter
1912 * preference or the last user requested regulatory
1913 * settings, user regulatory settings takes precedence.
1915 if (is_an_alpha2(alpha2
))
1916 regulatory_hint_user(user_alpha2
, NL80211_USER_REG_HINT_USER
);
1918 if (list_empty(&tmp_reg_req_list
))
1921 mutex_lock(&cfg80211_mutex
);
1922 mutex_lock(®_mutex
);
1924 spin_lock(®_requests_lock
);
1925 list_for_each_entry_safe(reg_request
, tmp
, &tmp_reg_req_list
, list
) {
1926 REG_DBG_PRINT("Adding request for country %c%c back into the queue\n",
1927 reg_request
->alpha2
[0], reg_request
->alpha2
[1]);
1928 list_move_tail(®_request
->list
, ®_requests_list
);
1930 spin_unlock(®_requests_lock
);
1932 mutex_unlock(®_mutex
);
1933 mutex_unlock(&cfg80211_mutex
);
1935 REG_DBG_PRINT("Kicking the queue\n");
1937 schedule_work(®_work
);
1940 void regulatory_hint_disconnect(void)
1942 REG_DBG_PRINT("All devices are disconnected, going to restore regulatory settings\n");
1943 restore_regulatory_settings(false);
1946 static bool freq_is_chan_12_13_14(u16 freq
)
1948 if (freq
== ieee80211_channel_to_frequency(12, IEEE80211_BAND_2GHZ
) ||
1949 freq
== ieee80211_channel_to_frequency(13, IEEE80211_BAND_2GHZ
) ||
1950 freq
== ieee80211_channel_to_frequency(14, IEEE80211_BAND_2GHZ
))
1955 int regulatory_hint_found_beacon(struct wiphy
*wiphy
,
1956 struct ieee80211_channel
*beacon_chan
,
1959 struct reg_beacon
*reg_beacon
;
1961 if (beacon_chan
->beacon_found
||
1962 beacon_chan
->flags
& IEEE80211_CHAN_RADAR
||
1963 (beacon_chan
->band
== IEEE80211_BAND_2GHZ
&&
1964 !freq_is_chan_12_13_14(beacon_chan
->center_freq
)))
1967 reg_beacon
= kzalloc(sizeof(struct reg_beacon
), gfp
);
1971 REG_DBG_PRINT("Found new beacon on frequency: %d MHz (Ch %d) on %s\n",
1972 beacon_chan
->center_freq
,
1973 ieee80211_frequency_to_channel(beacon_chan
->center_freq
),
1976 memcpy(®_beacon
->chan
, beacon_chan
,
1977 sizeof(struct ieee80211_channel
));
1980 * Since we can be called from BH or and non-BH context
1981 * we must use spin_lock_bh()
1983 spin_lock_bh(®_pending_beacons_lock
);
1984 list_add_tail(®_beacon
->list
, ®_pending_beacons
);
1985 spin_unlock_bh(®_pending_beacons_lock
);
1987 schedule_work(®_work
);
1992 static void print_rd_rules(const struct ieee80211_regdomain
*rd
)
1995 const struct ieee80211_reg_rule
*reg_rule
= NULL
;
1996 const struct ieee80211_freq_range
*freq_range
= NULL
;
1997 const struct ieee80211_power_rule
*power_rule
= NULL
;
1999 pr_info(" (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)\n");
2001 for (i
= 0; i
< rd
->n_reg_rules
; i
++) {
2002 reg_rule
= &rd
->reg_rules
[i
];
2003 freq_range
= ®_rule
->freq_range
;
2004 power_rule
= ®_rule
->power_rule
;
2007 * There may not be documentation for max antenna gain
2008 * in certain regions
2010 if (power_rule
->max_antenna_gain
)
2011 pr_info(" (%d KHz - %d KHz @ %d KHz), (%d mBi, %d mBm)\n",
2012 freq_range
->start_freq_khz
,
2013 freq_range
->end_freq_khz
,
2014 freq_range
->max_bandwidth_khz
,
2015 power_rule
->max_antenna_gain
,
2016 power_rule
->max_eirp
);
2018 pr_info(" (%d KHz - %d KHz @ %d KHz), (N/A, %d mBm)\n",
2019 freq_range
->start_freq_khz
,
2020 freq_range
->end_freq_khz
,
2021 freq_range
->max_bandwidth_khz
,
2022 power_rule
->max_eirp
);
2026 bool reg_supported_dfs_region(u8 dfs_region
)
2028 switch (dfs_region
) {
2029 case NL80211_DFS_UNSET
:
2030 case NL80211_DFS_FCC
:
2031 case NL80211_DFS_ETSI
:
2032 case NL80211_DFS_JP
:
2035 REG_DBG_PRINT("Ignoring uknown DFS master region: %d\n",
2041 static void print_dfs_region(u8 dfs_region
)
2046 switch (dfs_region
) {
2047 case NL80211_DFS_FCC
:
2048 pr_info(" DFS Master region FCC");
2050 case NL80211_DFS_ETSI
:
2051 pr_info(" DFS Master region ETSI");
2053 case NL80211_DFS_JP
:
2054 pr_info(" DFS Master region JP");
2057 pr_info(" DFS Master region Unknown");
2062 static void print_regdomain(const struct ieee80211_regdomain
*rd
)
2065 if (is_intersected_alpha2(rd
->alpha2
)) {
2066 if (last_request
->initiator
==
2067 NL80211_REGDOM_SET_BY_COUNTRY_IE
) {
2068 struct cfg80211_registered_device
*rdev
;
2069 rdev
= cfg80211_rdev_by_wiphy_idx(
2070 last_request
->wiphy_idx
);
2072 pr_info("Current regulatory domain updated by AP to: %c%c\n",
2073 rdev
->country_ie_alpha2
[0],
2074 rdev
->country_ie_alpha2
[1]);
2076 pr_info("Current regulatory domain intersected:\n");
2078 pr_info("Current regulatory domain intersected:\n");
2079 } else if (is_world_regdom(rd
->alpha2
)) {
2080 pr_info("World regulatory domain updated:\n");
2082 if (is_unknown_alpha2(rd
->alpha2
))
2083 pr_info("Regulatory domain changed to driver built-in settings (unknown country)\n");
2085 if (reg_request_cell_base(last_request
))
2086 pr_info("Regulatory domain changed to country: %c%c by Cell Station\n",
2087 rd
->alpha2
[0], rd
->alpha2
[1]);
2089 pr_info("Regulatory domain changed to country: %c%c\n",
2090 rd
->alpha2
[0], rd
->alpha2
[1]);
2094 print_dfs_region(rd
->dfs_region
);
2098 static void print_regdomain_info(const struct ieee80211_regdomain
*rd
)
2100 pr_info("Regulatory domain: %c%c\n", rd
->alpha2
[0], rd
->alpha2
[1]);
2104 /* Takes ownership of rd only if it doesn't fail */
2105 static int __set_regdom(const struct ieee80211_regdomain
*rd
)
2107 const struct ieee80211_regdomain
*regd
;
2108 const struct ieee80211_regdomain
*intersected_rd
= NULL
;
2109 struct wiphy
*request_wiphy
;
2110 /* Some basic sanity checks first */
2112 if (is_world_regdom(rd
->alpha2
)) {
2113 if (WARN_ON(!reg_is_valid_request(rd
->alpha2
)))
2115 update_world_regdomain(rd
);
2119 if (!is_alpha2_set(rd
->alpha2
) && !is_an_alpha2(rd
->alpha2
) &&
2120 !is_unknown_alpha2(rd
->alpha2
))
2127 * Lets only bother proceeding on the same alpha2 if the current
2128 * rd is non static (it means CRDA was present and was used last)
2129 * and the pending request came in from a country IE
2131 if (last_request
->initiator
!= NL80211_REGDOM_SET_BY_COUNTRY_IE
) {
2133 * If someone else asked us to change the rd lets only bother
2134 * checking if the alpha2 changes if CRDA was already called
2136 if (!regdom_changes(rd
->alpha2
))
2141 * Now lets set the regulatory domain, update all driver channels
2142 * and finally inform them of what we have done, in case they want
2143 * to review or adjust their own settings based on their own
2144 * internal EEPROM data
2147 if (WARN_ON(!reg_is_valid_request(rd
->alpha2
)))
2150 if (!is_valid_rd(rd
)) {
2151 pr_err("Invalid regulatory domain detected:\n");
2152 print_regdomain_info(rd
);
2156 request_wiphy
= wiphy_idx_to_wiphy(last_request
->wiphy_idx
);
2157 if (!request_wiphy
&&
2158 (last_request
->initiator
== NL80211_REGDOM_SET_BY_DRIVER
||
2159 last_request
->initiator
== NL80211_REGDOM_SET_BY_COUNTRY_IE
)) {
2160 schedule_delayed_work(®_timeout
, 0);
2164 if (!last_request
->intersect
) {
2165 if (last_request
->initiator
!= NL80211_REGDOM_SET_BY_DRIVER
) {
2166 reset_regdomains(false);
2167 cfg80211_regdomain
= rd
;
2172 * For a driver hint, lets copy the regulatory domain the
2173 * driver wanted to the wiphy to deal with conflicts
2177 * Userspace could have sent two replies with only
2178 * one kernel request.
2180 if (request_wiphy
->regd
)
2183 regd
= reg_copy_regd(rd
);
2185 return PTR_ERR(regd
);
2187 request_wiphy
->regd
= regd
;
2188 reset_regdomains(false);
2189 cfg80211_regdomain
= rd
;
2193 /* Intersection requires a bit more work */
2195 if (last_request
->initiator
!= NL80211_REGDOM_SET_BY_COUNTRY_IE
) {
2196 intersected_rd
= regdom_intersect(rd
, cfg80211_regdomain
);
2197 if (!intersected_rd
)
2201 * We can trash what CRDA provided now.
2202 * However if a driver requested this specific regulatory
2203 * domain we keep it for its private use
2205 if (last_request
->initiator
== NL80211_REGDOM_SET_BY_DRIVER
)
2206 request_wiphy
->regd
= rd
;
2212 reset_regdomains(false);
2213 cfg80211_regdomain
= intersected_rd
;
2223 * Use this call to set the current regulatory domain. Conflicts with
2224 * multiple drivers can be ironed out later. Caller must've already
2225 * kmalloc'd the rd structure. Caller must hold cfg80211_mutex
2227 int set_regdom(const struct ieee80211_regdomain
*rd
)
2231 assert_cfg80211_lock();
2233 mutex_lock(®_mutex
);
2235 /* Note that this doesn't update the wiphys, this is done below */
2236 r
= __set_regdom(rd
);
2239 reg_set_request_processed();
2242 mutex_unlock(®_mutex
);
2246 /* This would make this whole thing pointless */
2247 BUG_ON(!last_request
->intersect
&& rd
!= cfg80211_regdomain
);
2249 /* update all wiphys now with the new established regulatory domain */
2250 update_all_wiphy_regulatory(last_request
->initiator
);
2252 print_regdomain(cfg80211_regdomain
);
2254 nl80211_send_reg_change_event(last_request
);
2256 reg_set_request_processed();
2258 mutex_unlock(®_mutex
);
2263 #ifdef CONFIG_HOTPLUG
2264 int reg_device_uevent(struct device
*dev
, struct kobj_uevent_env
*env
)
2266 if (last_request
&& !last_request
->processed
) {
2267 if (add_uevent_var(env
, "COUNTRY=%c%c",
2268 last_request
->alpha2
[0],
2269 last_request
->alpha2
[1]))
2276 int reg_device_uevent(struct device
*dev
, struct kobj_uevent_env
*env
)
2280 #endif /* CONFIG_HOTPLUG */
2282 void wiphy_regulatory_register(struct wiphy
*wiphy
)
2284 assert_cfg80211_lock();
2286 mutex_lock(®_mutex
);
2288 if (!reg_dev_ignore_cell_hint(wiphy
))
2289 reg_num_devs_support_basehint
++;
2291 wiphy_update_regulatory(wiphy
, NL80211_REGDOM_SET_BY_CORE
);
2293 mutex_unlock(®_mutex
);
2296 /* Caller must hold cfg80211_mutex */
2297 void wiphy_regulatory_deregister(struct wiphy
*wiphy
)
2299 struct wiphy
*request_wiphy
= NULL
;
2301 assert_cfg80211_lock();
2303 mutex_lock(®_mutex
);
2305 if (!reg_dev_ignore_cell_hint(wiphy
))
2306 reg_num_devs_support_basehint
--;
2311 request_wiphy
= wiphy_idx_to_wiphy(last_request
->wiphy_idx
);
2313 if (!request_wiphy
|| request_wiphy
!= wiphy
)
2316 last_request
->wiphy_idx
= WIPHY_IDX_INVALID
;
2317 last_request
->country_ie_env
= ENVIRON_ANY
;
2319 mutex_unlock(®_mutex
);
2322 static void reg_timeout_work(struct work_struct
*work
)
2324 REG_DBG_PRINT("Timeout while waiting for CRDA to reply, restoring regulatory settings\n");
2325 restore_regulatory_settings(true);
2328 int __init
regulatory_init(void)
2332 reg_pdev
= platform_device_register_simple("regulatory", 0, NULL
, 0);
2333 if (IS_ERR(reg_pdev
))
2334 return PTR_ERR(reg_pdev
);
2336 reg_pdev
->dev
.type
= ®_device_type
;
2338 spin_lock_init(®_requests_lock
);
2339 spin_lock_init(®_pending_beacons_lock
);
2341 reg_regdb_size_check();
2343 cfg80211_regdomain
= cfg80211_world_regdom
;
2345 user_alpha2
[0] = '9';
2346 user_alpha2
[1] = '7';
2348 /* We always try to get an update for the static regdomain */
2349 err
= regulatory_hint_core(cfg80211_regdomain
->alpha2
);
2354 * N.B. kobject_uevent_env() can fail mainly for when we're out
2355 * memory which is handled and propagated appropriately above
2356 * but it can also fail during a netlink_broadcast() or during
2357 * early boot for call_usermodehelper(). For now treat these
2358 * errors as non-fatal.
2360 pr_err("kobject_uevent_env() was unable to call CRDA during init\n");
2361 #ifdef CONFIG_CFG80211_REG_DEBUG
2362 /* We want to find out exactly why when debugging */
2368 * Finally, if the user set the module parameter treat it
2371 if (!is_world_regdom(ieee80211_regdom
))
2372 regulatory_hint_user(ieee80211_regdom
,
2373 NL80211_USER_REG_HINT_USER
);
2378 void regulatory_exit(void)
2380 struct regulatory_request
*reg_request
, *tmp
;
2381 struct reg_beacon
*reg_beacon
, *btmp
;
2383 cancel_work_sync(®_work
);
2384 cancel_delayed_work_sync(®_timeout
);
2386 /* Lock to suppress warnings */
2387 mutex_lock(&cfg80211_mutex
);
2388 mutex_lock(®_mutex
);
2389 reset_regdomains(true);
2390 mutex_unlock(&cfg80211_mutex
);
2391 mutex_unlock(®_mutex
);
2393 dev_set_uevent_suppress(®_pdev
->dev
, true);
2395 platform_device_unregister(reg_pdev
);
2397 list_for_each_entry_safe(reg_beacon
, btmp
, ®_pending_beacons
, list
) {
2398 list_del(®_beacon
->list
);
2402 list_for_each_entry_safe(reg_beacon
, btmp
, ®_beacon_list
, list
) {
2403 list_del(®_beacon
->list
);
2407 list_for_each_entry_safe(reg_request
, tmp
, ®_requests_list
, list
) {
2408 list_del(®_request
->list
);