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
,
85 * Receipt of information from last regulatory request,
86 * protected by RTNL (and can be accessed with RCU protection)
88 static struct regulatory_request __rcu
*last_request
=
89 (void __rcu
*)&core_request_world
;
91 /* To trigger userspace events */
92 static struct platform_device
*reg_pdev
;
94 static const struct device_type reg_device_type
= {
95 .uevent
= reg_device_uevent
,
99 * Central wireless core regulatory domains, we only need two,
100 * the current one and a world regulatory domain in case we have no
101 * information to give us an alpha2.
102 * (protected by RTNL, can be read under RCU)
104 const struct ieee80211_regdomain __rcu
*cfg80211_regdomain
;
107 * Number of devices that registered to the core
108 * that support cellular base station regulatory hints
109 * (protected by RTNL)
111 static int reg_num_devs_support_basehint
;
113 static const struct ieee80211_regdomain
*get_cfg80211_regdom(void)
115 return rtnl_dereference(cfg80211_regdomain
);
118 static const struct ieee80211_regdomain
*get_wiphy_regdom(struct wiphy
*wiphy
)
120 return rtnl_dereference(wiphy
->regd
);
123 static const char *reg_dfs_region_str(enum nl80211_dfs_regions dfs_region
)
125 switch (dfs_region
) {
126 case NL80211_DFS_UNSET
:
128 case NL80211_DFS_FCC
:
130 case NL80211_DFS_ETSI
:
138 enum nl80211_dfs_regions
reg_get_dfs_region(struct wiphy
*wiphy
)
140 const struct ieee80211_regdomain
*regd
= NULL
;
141 const struct ieee80211_regdomain
*wiphy_regd
= NULL
;
143 regd
= get_cfg80211_regdom();
147 wiphy_regd
= get_wiphy_regdom(wiphy
);
151 if (wiphy_regd
->dfs_region
== regd
->dfs_region
)
154 REG_DBG_PRINT("%s: device specific dfs_region "
155 "(%s) disagrees with cfg80211's "
156 "central dfs_region (%s)\n",
157 dev_name(&wiphy
->dev
),
158 reg_dfs_region_str(wiphy_regd
->dfs_region
),
159 reg_dfs_region_str(regd
->dfs_region
));
162 return regd
->dfs_region
;
165 static void rcu_free_regdom(const struct ieee80211_regdomain
*r
)
169 kfree_rcu((struct ieee80211_regdomain
*)r
, rcu_head
);
172 static struct regulatory_request
*get_last_request(void)
174 return rcu_dereference_rtnl(last_request
);
177 /* Used to queue up regulatory hints */
178 static LIST_HEAD(reg_requests_list
);
179 static spinlock_t reg_requests_lock
;
181 /* Used to queue up beacon hints for review */
182 static LIST_HEAD(reg_pending_beacons
);
183 static spinlock_t reg_pending_beacons_lock
;
185 /* Used to keep track of processed beacon hints */
186 static LIST_HEAD(reg_beacon_list
);
189 struct list_head list
;
190 struct ieee80211_channel chan
;
193 static void reg_todo(struct work_struct
*work
);
194 static DECLARE_WORK(reg_work
, reg_todo
);
196 static void reg_timeout_work(struct work_struct
*work
);
197 static DECLARE_DELAYED_WORK(reg_timeout
, reg_timeout_work
);
199 /* We keep a static world regulatory domain in case of the absence of CRDA */
200 static const struct ieee80211_regdomain world_regdom
= {
204 /* IEEE 802.11b/g, channels 1..11 */
205 REG_RULE(2412-10, 2462+10, 40, 6, 20, 0),
206 /* IEEE 802.11b/g, channels 12..13. */
207 REG_RULE(2467-10, 2472+10, 40, 6, 20,
209 /* IEEE 802.11 channel 14 - Only JP enables
210 * this and for 802.11b only */
211 REG_RULE(2484-10, 2484+10, 20, 6, 20,
213 NL80211_RRF_NO_OFDM
),
214 /* IEEE 802.11a, channel 36..48 */
215 REG_RULE(5180-10, 5240+10, 160, 6, 20,
218 /* IEEE 802.11a, channel 52..64 - DFS required */
219 REG_RULE(5260-10, 5320+10, 160, 6, 20,
223 /* IEEE 802.11a, channel 100..144 - DFS required */
224 REG_RULE(5500-10, 5720+10, 160, 6, 20,
228 /* IEEE 802.11a, channel 149..165 */
229 REG_RULE(5745-10, 5825+10, 80, 6, 20,
232 /* IEEE 802.11ad (60gHz), channels 1..3 */
233 REG_RULE(56160+2160*1-1080, 56160+2160*3+1080, 2160, 0, 0, 0),
237 /* protected by RTNL */
238 static const struct ieee80211_regdomain
*cfg80211_world_regdom
=
241 static char *ieee80211_regdom
= "00";
242 static char user_alpha2
[2];
244 module_param(ieee80211_regdom
, charp
, 0444);
245 MODULE_PARM_DESC(ieee80211_regdom
, "IEEE 802.11 regulatory domain code");
247 static void reg_kfree_last_request(void)
249 struct regulatory_request
*lr
;
251 lr
= get_last_request();
253 if (lr
!= &core_request_world
&& lr
)
254 kfree_rcu(lr
, rcu_head
);
257 static void reg_update_last_request(struct regulatory_request
*request
)
259 reg_kfree_last_request();
260 rcu_assign_pointer(last_request
, request
);
263 static void reset_regdomains(bool full_reset
,
264 const struct ieee80211_regdomain
*new_regdom
)
266 const struct ieee80211_regdomain
*r
;
270 r
= get_cfg80211_regdom();
272 /* avoid freeing static information or freeing something twice */
273 if (r
== cfg80211_world_regdom
)
275 if (cfg80211_world_regdom
== &world_regdom
)
276 cfg80211_world_regdom
= NULL
;
277 if (r
== &world_regdom
)
281 rcu_free_regdom(cfg80211_world_regdom
);
283 cfg80211_world_regdom
= &world_regdom
;
284 rcu_assign_pointer(cfg80211_regdomain
, new_regdom
);
289 reg_update_last_request(&core_request_world
);
293 * Dynamic world regulatory domain requested by the wireless
294 * core upon initialization
296 static void update_world_regdomain(const struct ieee80211_regdomain
*rd
)
298 struct regulatory_request
*lr
;
300 lr
= get_last_request();
304 reset_regdomains(false, rd
);
306 cfg80211_world_regdom
= rd
;
309 bool is_world_regdom(const char *alpha2
)
313 return alpha2
[0] == '0' && alpha2
[1] == '0';
316 static bool is_alpha2_set(const char *alpha2
)
320 return alpha2
[0] && alpha2
[1];
323 static bool is_unknown_alpha2(const char *alpha2
)
328 * Special case where regulatory domain was built by driver
329 * but a specific alpha2 cannot be determined
331 return alpha2
[0] == '9' && alpha2
[1] == '9';
334 static bool is_intersected_alpha2(const char *alpha2
)
339 * Special case where regulatory domain is the
340 * result of an intersection between two regulatory domain
343 return alpha2
[0] == '9' && alpha2
[1] == '8';
346 static bool is_an_alpha2(const char *alpha2
)
350 return isalpha(alpha2
[0]) && isalpha(alpha2
[1]);
353 static bool alpha2_equal(const char *alpha2_x
, const char *alpha2_y
)
355 if (!alpha2_x
|| !alpha2_y
)
357 return alpha2_x
[0] == alpha2_y
[0] && alpha2_x
[1] == alpha2_y
[1];
360 static bool regdom_changes(const char *alpha2
)
362 const struct ieee80211_regdomain
*r
= get_cfg80211_regdom();
366 return !alpha2_equal(r
->alpha2
, alpha2
);
370 * The NL80211_REGDOM_SET_BY_USER regdom alpha2 is cached, this lets
371 * you know if a valid regulatory hint with NL80211_REGDOM_SET_BY_USER
372 * has ever been issued.
374 static bool is_user_regdom_saved(void)
376 if (user_alpha2
[0] == '9' && user_alpha2
[1] == '7')
379 /* This would indicate a mistake on the design */
380 if (WARN(!is_world_regdom(user_alpha2
) && !is_an_alpha2(user_alpha2
),
381 "Unexpected user alpha2: %c%c\n",
382 user_alpha2
[0], user_alpha2
[1]))
388 static const struct ieee80211_regdomain
*
389 reg_copy_regd(const struct ieee80211_regdomain
*src_regd
)
391 struct ieee80211_regdomain
*regd
;
396 sizeof(struct ieee80211_regdomain
) +
397 src_regd
->n_reg_rules
* sizeof(struct ieee80211_reg_rule
);
399 regd
= kzalloc(size_of_regd
, GFP_KERNEL
);
401 return ERR_PTR(-ENOMEM
);
403 memcpy(regd
, src_regd
, sizeof(struct ieee80211_regdomain
));
405 for (i
= 0; i
< src_regd
->n_reg_rules
; i
++)
406 memcpy(®d
->reg_rules
[i
], &src_regd
->reg_rules
[i
],
407 sizeof(struct ieee80211_reg_rule
));
412 #ifdef CONFIG_CFG80211_INTERNAL_REGDB
413 struct reg_regdb_search_request
{
415 struct list_head list
;
418 static LIST_HEAD(reg_regdb_search_list
);
419 static DEFINE_MUTEX(reg_regdb_search_mutex
);
421 static void reg_regdb_search(struct work_struct
*work
)
423 struct reg_regdb_search_request
*request
;
424 const struct ieee80211_regdomain
*curdom
, *regdom
= NULL
;
429 mutex_lock(®_regdb_search_mutex
);
430 while (!list_empty(®_regdb_search_list
)) {
431 request
= list_first_entry(®_regdb_search_list
,
432 struct reg_regdb_search_request
,
434 list_del(&request
->list
);
436 for (i
= 0; i
< reg_regdb_size
; i
++) {
437 curdom
= reg_regdb
[i
];
439 if (alpha2_equal(request
->alpha2
, curdom
->alpha2
)) {
440 regdom
= reg_copy_regd(curdom
);
447 mutex_unlock(®_regdb_search_mutex
);
449 if (!IS_ERR_OR_NULL(regdom
))
455 static DECLARE_WORK(reg_regdb_work
, reg_regdb_search
);
457 static void reg_regdb_query(const char *alpha2
)
459 struct reg_regdb_search_request
*request
;
464 request
= kzalloc(sizeof(struct reg_regdb_search_request
), GFP_KERNEL
);
468 memcpy(request
->alpha2
, alpha2
, 2);
470 mutex_lock(®_regdb_search_mutex
);
471 list_add_tail(&request
->list
, ®_regdb_search_list
);
472 mutex_unlock(®_regdb_search_mutex
);
474 schedule_work(®_regdb_work
);
477 /* Feel free to add any other sanity checks here */
478 static void reg_regdb_size_check(void)
480 /* We should ideally BUILD_BUG_ON() but then random builds would fail */
481 WARN_ONCE(!reg_regdb_size
, "db.txt is empty, you should update it...");
484 static inline void reg_regdb_size_check(void) {}
485 static inline void reg_regdb_query(const char *alpha2
) {}
486 #endif /* CONFIG_CFG80211_INTERNAL_REGDB */
489 * This lets us keep regulatory code which is updated on a regulatory
490 * basis in userspace. Country information is filled in by
493 static int call_crda(const char *alpha2
)
495 if (!is_world_regdom((char *) alpha2
))
496 pr_info("Calling CRDA for country: %c%c\n",
497 alpha2
[0], alpha2
[1]);
499 pr_info("Calling CRDA to update world regulatory domain\n");
501 /* query internal regulatory database (if it exists) */
502 reg_regdb_query(alpha2
);
504 return kobject_uevent(®_pdev
->dev
.kobj
, KOBJ_CHANGE
);
507 static enum reg_request_treatment
508 reg_call_crda(struct regulatory_request
*request
)
510 if (call_crda(request
->alpha2
))
511 return REG_REQ_IGNORE
;
515 bool reg_is_valid_request(const char *alpha2
)
517 struct regulatory_request
*lr
= get_last_request();
519 if (!lr
|| lr
->processed
)
522 return alpha2_equal(lr
->alpha2
, alpha2
);
525 static const struct ieee80211_regdomain
*reg_get_regdomain(struct wiphy
*wiphy
)
527 struct regulatory_request
*lr
= get_last_request();
530 * Follow the driver's regulatory domain, if present, unless a country
531 * IE has been processed or a user wants to help complaince further
533 if (lr
->initiator
!= NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
534 lr
->initiator
!= NL80211_REGDOM_SET_BY_USER
&&
536 return get_wiphy_regdom(wiphy
);
538 return get_cfg80211_regdom();
541 /* Sanity check on a regulatory rule */
542 static bool is_valid_reg_rule(const struct ieee80211_reg_rule
*rule
)
544 const struct ieee80211_freq_range
*freq_range
= &rule
->freq_range
;
547 if (freq_range
->start_freq_khz
<= 0 || freq_range
->end_freq_khz
<= 0)
550 if (freq_range
->start_freq_khz
> freq_range
->end_freq_khz
)
553 freq_diff
= freq_range
->end_freq_khz
- freq_range
->start_freq_khz
;
555 if (freq_range
->end_freq_khz
<= freq_range
->start_freq_khz
||
556 freq_range
->max_bandwidth_khz
> freq_diff
)
562 static bool is_valid_rd(const struct ieee80211_regdomain
*rd
)
564 const struct ieee80211_reg_rule
*reg_rule
= NULL
;
567 if (!rd
->n_reg_rules
)
570 if (WARN_ON(rd
->n_reg_rules
> NL80211_MAX_SUPP_REG_RULES
))
573 for (i
= 0; i
< rd
->n_reg_rules
; i
++) {
574 reg_rule
= &rd
->reg_rules
[i
];
575 if (!is_valid_reg_rule(reg_rule
))
582 static bool reg_does_bw_fit(const struct ieee80211_freq_range
*freq_range
,
583 u32 center_freq_khz
, u32 bw_khz
)
585 u32 start_freq_khz
, end_freq_khz
;
587 start_freq_khz
= center_freq_khz
- (bw_khz
/2);
588 end_freq_khz
= center_freq_khz
+ (bw_khz
/2);
590 if (start_freq_khz
>= freq_range
->start_freq_khz
&&
591 end_freq_khz
<= freq_range
->end_freq_khz
)
598 * freq_in_rule_band - tells us if a frequency is in a frequency band
599 * @freq_range: frequency rule we want to query
600 * @freq_khz: frequency we are inquiring about
602 * This lets us know if a specific frequency rule is or is not relevant to
603 * a specific frequency's band. Bands are device specific and artificial
604 * definitions (the "2.4 GHz band", the "5 GHz band" and the "60GHz band"),
605 * however it is safe for now to assume that a frequency rule should not be
606 * part of a frequency's band if the start freq or end freq are off by more
607 * than 2 GHz for the 2.4 and 5 GHz bands, and by more than 10 GHz for the
609 * This resolution can be lowered and should be considered as we add
610 * regulatory rule support for other "bands".
612 static bool freq_in_rule_band(const struct ieee80211_freq_range
*freq_range
,
615 #define ONE_GHZ_IN_KHZ 1000000
617 * From 802.11ad: directional multi-gigabit (DMG):
618 * Pertaining to operation in a frequency band containing a channel
619 * with the Channel starting frequency above 45 GHz.
621 u32 limit
= freq_khz
> 45 * ONE_GHZ_IN_KHZ
?
622 10 * ONE_GHZ_IN_KHZ
: 2 * ONE_GHZ_IN_KHZ
;
623 if (abs(freq_khz
- freq_range
->start_freq_khz
) <= limit
)
625 if (abs(freq_khz
- freq_range
->end_freq_khz
) <= limit
)
628 #undef ONE_GHZ_IN_KHZ
632 * Later on we can perhaps use the more restrictive DFS
633 * region but we don't have information for that yet so
634 * for now simply disallow conflicts.
636 static enum nl80211_dfs_regions
637 reg_intersect_dfs_region(const enum nl80211_dfs_regions dfs_region1
,
638 const enum nl80211_dfs_regions dfs_region2
)
640 if (dfs_region1
!= dfs_region2
)
641 return NL80211_DFS_UNSET
;
646 * Helper for regdom_intersect(), this does the real
647 * mathematical intersection fun
649 static int reg_rules_intersect(const struct ieee80211_reg_rule
*rule1
,
650 const struct ieee80211_reg_rule
*rule2
,
651 struct ieee80211_reg_rule
*intersected_rule
)
653 const struct ieee80211_freq_range
*freq_range1
, *freq_range2
;
654 struct ieee80211_freq_range
*freq_range
;
655 const struct ieee80211_power_rule
*power_rule1
, *power_rule2
;
656 struct ieee80211_power_rule
*power_rule
;
659 freq_range1
= &rule1
->freq_range
;
660 freq_range2
= &rule2
->freq_range
;
661 freq_range
= &intersected_rule
->freq_range
;
663 power_rule1
= &rule1
->power_rule
;
664 power_rule2
= &rule2
->power_rule
;
665 power_rule
= &intersected_rule
->power_rule
;
667 freq_range
->start_freq_khz
= max(freq_range1
->start_freq_khz
,
668 freq_range2
->start_freq_khz
);
669 freq_range
->end_freq_khz
= min(freq_range1
->end_freq_khz
,
670 freq_range2
->end_freq_khz
);
671 freq_range
->max_bandwidth_khz
= min(freq_range1
->max_bandwidth_khz
,
672 freq_range2
->max_bandwidth_khz
);
674 freq_diff
= freq_range
->end_freq_khz
- freq_range
->start_freq_khz
;
675 if (freq_range
->max_bandwidth_khz
> freq_diff
)
676 freq_range
->max_bandwidth_khz
= freq_diff
;
678 power_rule
->max_eirp
= min(power_rule1
->max_eirp
,
679 power_rule2
->max_eirp
);
680 power_rule
->max_antenna_gain
= min(power_rule1
->max_antenna_gain
,
681 power_rule2
->max_antenna_gain
);
683 intersected_rule
->flags
= rule1
->flags
| rule2
->flags
;
685 if (!is_valid_reg_rule(intersected_rule
))
692 * regdom_intersect - do the intersection between two regulatory domains
693 * @rd1: first regulatory domain
694 * @rd2: second regulatory domain
696 * Use this function to get the intersection between two regulatory domains.
697 * Once completed we will mark the alpha2 for the rd as intersected, "98",
698 * as no one single alpha2 can represent this regulatory domain.
700 * Returns a pointer to the regulatory domain structure which will hold the
701 * resulting intersection of rules between rd1 and rd2. We will
702 * kzalloc() this structure for you.
704 static struct ieee80211_regdomain
*
705 regdom_intersect(const struct ieee80211_regdomain
*rd1
,
706 const struct ieee80211_regdomain
*rd2
)
710 unsigned int num_rules
= 0, rule_idx
= 0;
711 const struct ieee80211_reg_rule
*rule1
, *rule2
;
712 struct ieee80211_reg_rule
*intersected_rule
;
713 struct ieee80211_regdomain
*rd
;
714 /* This is just a dummy holder to help us count */
715 struct ieee80211_reg_rule dummy_rule
;
721 * First we get a count of the rules we'll need, then we actually
722 * build them. This is to so we can malloc() and free() a
723 * regdomain once. The reason we use reg_rules_intersect() here
724 * is it will return -EINVAL if the rule computed makes no sense.
725 * All rules that do check out OK are valid.
728 for (x
= 0; x
< rd1
->n_reg_rules
; x
++) {
729 rule1
= &rd1
->reg_rules
[x
];
730 for (y
= 0; y
< rd2
->n_reg_rules
; y
++) {
731 rule2
= &rd2
->reg_rules
[y
];
732 if (!reg_rules_intersect(rule1
, rule2
, &dummy_rule
))
740 size_of_regd
= sizeof(struct ieee80211_regdomain
) +
741 num_rules
* sizeof(struct ieee80211_reg_rule
);
743 rd
= kzalloc(size_of_regd
, GFP_KERNEL
);
747 for (x
= 0; x
< rd1
->n_reg_rules
&& rule_idx
< num_rules
; x
++) {
748 rule1
= &rd1
->reg_rules
[x
];
749 for (y
= 0; y
< rd2
->n_reg_rules
&& rule_idx
< num_rules
; y
++) {
750 rule2
= &rd2
->reg_rules
[y
];
752 * This time around instead of using the stack lets
753 * write to the target rule directly saving ourselves
756 intersected_rule
= &rd
->reg_rules
[rule_idx
];
757 r
= reg_rules_intersect(rule1
, rule2
, intersected_rule
);
759 * No need to memset here the intersected rule here as
760 * we're not using the stack anymore
768 if (rule_idx
!= num_rules
) {
773 rd
->n_reg_rules
= num_rules
;
776 rd
->dfs_region
= reg_intersect_dfs_region(rd1
->dfs_region
,
783 * XXX: add support for the rest of enum nl80211_reg_rule_flags, we may
784 * want to just have the channel structure use these
786 static u32
map_regdom_flags(u32 rd_flags
)
788 u32 channel_flags
= 0;
789 if (rd_flags
& NL80211_RRF_NO_IR_ALL
)
790 channel_flags
|= IEEE80211_CHAN_NO_IR
;
791 if (rd_flags
& NL80211_RRF_DFS
)
792 channel_flags
|= IEEE80211_CHAN_RADAR
;
793 if (rd_flags
& NL80211_RRF_NO_OFDM
)
794 channel_flags
|= IEEE80211_CHAN_NO_OFDM
;
795 return channel_flags
;
798 static const struct ieee80211_reg_rule
*
799 freq_reg_info_regd(struct wiphy
*wiphy
, u32 center_freq
,
800 const struct ieee80211_regdomain
*regd
)
803 bool band_rule_found
= false;
804 bool bw_fits
= false;
807 return ERR_PTR(-EINVAL
);
809 for (i
= 0; i
< regd
->n_reg_rules
; i
++) {
810 const struct ieee80211_reg_rule
*rr
;
811 const struct ieee80211_freq_range
*fr
= NULL
;
813 rr
= ®d
->reg_rules
[i
];
814 fr
= &rr
->freq_range
;
817 * We only need to know if one frequency rule was
818 * was in center_freq's band, that's enough, so lets
819 * not overwrite it once found
821 if (!band_rule_found
)
822 band_rule_found
= freq_in_rule_band(fr
, center_freq
);
824 bw_fits
= reg_does_bw_fit(fr
, center_freq
, MHZ_TO_KHZ(20));
826 if (band_rule_found
&& bw_fits
)
830 if (!band_rule_found
)
831 return ERR_PTR(-ERANGE
);
833 return ERR_PTR(-EINVAL
);
836 const struct ieee80211_reg_rule
*freq_reg_info(struct wiphy
*wiphy
,
839 const struct ieee80211_regdomain
*regd
;
841 regd
= reg_get_regdomain(wiphy
);
843 return freq_reg_info_regd(wiphy
, center_freq
, regd
);
845 EXPORT_SYMBOL(freq_reg_info
);
847 const char *reg_initiator_name(enum nl80211_reg_initiator initiator
)
850 case NL80211_REGDOM_SET_BY_CORE
:
852 case NL80211_REGDOM_SET_BY_USER
:
854 case NL80211_REGDOM_SET_BY_DRIVER
:
856 case NL80211_REGDOM_SET_BY_COUNTRY_IE
:
863 EXPORT_SYMBOL(reg_initiator_name
);
865 #ifdef CONFIG_CFG80211_REG_DEBUG
866 static void chan_reg_rule_print_dbg(struct ieee80211_channel
*chan
,
867 const struct ieee80211_reg_rule
*reg_rule
)
869 const struct ieee80211_power_rule
*power_rule
;
870 const struct ieee80211_freq_range
*freq_range
;
871 char max_antenna_gain
[32];
873 power_rule
= ®_rule
->power_rule
;
874 freq_range
= ®_rule
->freq_range
;
876 if (!power_rule
->max_antenna_gain
)
877 snprintf(max_antenna_gain
, 32, "N/A");
879 snprintf(max_antenna_gain
, 32, "%d", power_rule
->max_antenna_gain
);
881 REG_DBG_PRINT("Updating information on frequency %d MHz with regulatory rule:\n",
884 REG_DBG_PRINT("%d KHz - %d KHz @ %d KHz), (%s mBi, %d mBm)\n",
885 freq_range
->start_freq_khz
, freq_range
->end_freq_khz
,
886 freq_range
->max_bandwidth_khz
, max_antenna_gain
,
887 power_rule
->max_eirp
);
890 static void chan_reg_rule_print_dbg(struct ieee80211_channel
*chan
,
891 const struct ieee80211_reg_rule
*reg_rule
)
898 * Note that right now we assume the desired channel bandwidth
899 * is always 20 MHz for each individual channel (HT40 uses 20 MHz
900 * per channel, the primary and the extension channel).
902 static void handle_channel(struct wiphy
*wiphy
,
903 enum nl80211_reg_initiator initiator
,
904 struct ieee80211_channel
*chan
)
906 u32 flags
, bw_flags
= 0;
907 const struct ieee80211_reg_rule
*reg_rule
= NULL
;
908 const struct ieee80211_power_rule
*power_rule
= NULL
;
909 const struct ieee80211_freq_range
*freq_range
= NULL
;
910 struct wiphy
*request_wiphy
= NULL
;
911 struct regulatory_request
*lr
= get_last_request();
913 request_wiphy
= wiphy_idx_to_wiphy(lr
->wiphy_idx
);
915 flags
= chan
->orig_flags
;
917 reg_rule
= freq_reg_info(wiphy
, MHZ_TO_KHZ(chan
->center_freq
));
918 if (IS_ERR(reg_rule
)) {
920 * We will disable all channels that do not match our
921 * received regulatory rule unless the hint is coming
922 * from a Country IE and the Country IE had no information
923 * about a band. The IEEE 802.11 spec allows for an AP
924 * to send only a subset of the regulatory rules allowed,
925 * so an AP in the US that only supports 2.4 GHz may only send
926 * a country IE with information for the 2.4 GHz band
927 * while 5 GHz is still supported.
929 if (initiator
== NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
930 PTR_ERR(reg_rule
) == -ERANGE
)
933 if (lr
->initiator
== NL80211_REGDOM_SET_BY_DRIVER
&&
934 request_wiphy
&& request_wiphy
== wiphy
&&
935 request_wiphy
->regulatory_flags
& REGULATORY_STRICT_REG
) {
936 REG_DBG_PRINT("Disabling freq %d MHz for good\n",
938 chan
->orig_flags
|= IEEE80211_CHAN_DISABLED
;
939 chan
->flags
= chan
->orig_flags
;
941 REG_DBG_PRINT("Disabling freq %d MHz\n",
943 chan
->flags
|= IEEE80211_CHAN_DISABLED
;
948 chan_reg_rule_print_dbg(chan
, reg_rule
);
950 power_rule
= ®_rule
->power_rule
;
951 freq_range
= ®_rule
->freq_range
;
953 if (freq_range
->max_bandwidth_khz
< MHZ_TO_KHZ(40))
954 bw_flags
= IEEE80211_CHAN_NO_HT40
;
955 if (freq_range
->max_bandwidth_khz
< MHZ_TO_KHZ(80))
956 bw_flags
|= IEEE80211_CHAN_NO_80MHZ
;
957 if (freq_range
->max_bandwidth_khz
< MHZ_TO_KHZ(160))
958 bw_flags
|= IEEE80211_CHAN_NO_160MHZ
;
960 if (lr
->initiator
== NL80211_REGDOM_SET_BY_DRIVER
&&
961 request_wiphy
&& request_wiphy
== wiphy
&&
962 request_wiphy
->regulatory_flags
& REGULATORY_STRICT_REG
) {
964 * This guarantees the driver's requested regulatory domain
965 * will always be used as a base for further regulatory
968 chan
->flags
= chan
->orig_flags
=
969 map_regdom_flags(reg_rule
->flags
) | bw_flags
;
970 chan
->max_antenna_gain
= chan
->orig_mag
=
971 (int) MBI_TO_DBI(power_rule
->max_antenna_gain
);
972 chan
->max_reg_power
= chan
->max_power
= chan
->orig_mpwr
=
973 (int) MBM_TO_DBM(power_rule
->max_eirp
);
977 chan
->dfs_state
= NL80211_DFS_USABLE
;
978 chan
->dfs_state_entered
= jiffies
;
980 chan
->beacon_found
= false;
981 chan
->flags
= flags
| bw_flags
| map_regdom_flags(reg_rule
->flags
);
982 chan
->max_antenna_gain
=
983 min_t(int, chan
->orig_mag
,
984 MBI_TO_DBI(power_rule
->max_antenna_gain
));
985 chan
->max_reg_power
= (int) MBM_TO_DBM(power_rule
->max_eirp
);
986 if (chan
->orig_mpwr
) {
988 * Devices that use REGULATORY_COUNTRY_IE_FOLLOW_POWER
989 * will always follow the passed country IE power settings.
991 if (initiator
== NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
992 wiphy
->regulatory_flags
& REGULATORY_COUNTRY_IE_FOLLOW_POWER
)
993 chan
->max_power
= chan
->max_reg_power
;
995 chan
->max_power
= min(chan
->orig_mpwr
,
996 chan
->max_reg_power
);
998 chan
->max_power
= chan
->max_reg_power
;
1001 static void handle_band(struct wiphy
*wiphy
,
1002 enum nl80211_reg_initiator initiator
,
1003 struct ieee80211_supported_band
*sband
)
1010 for (i
= 0; i
< sband
->n_channels
; i
++)
1011 handle_channel(wiphy
, initiator
, &sband
->channels
[i
]);
1014 static bool reg_request_cell_base(struct regulatory_request
*request
)
1016 if (request
->initiator
!= NL80211_REGDOM_SET_BY_USER
)
1018 return request
->user_reg_hint_type
== NL80211_USER_REG_HINT_CELL_BASE
;
1021 bool reg_last_request_cell_base(void)
1023 return reg_request_cell_base(get_last_request());
1026 #ifdef CONFIG_CFG80211_CERTIFICATION_ONUS
1027 /* Core specific check */
1028 static enum reg_request_treatment
1029 reg_ignore_cell_hint(struct regulatory_request
*pending_request
)
1031 struct regulatory_request
*lr
= get_last_request();
1033 if (!reg_num_devs_support_basehint
)
1034 return REG_REQ_IGNORE
;
1036 if (reg_request_cell_base(lr
) &&
1037 !regdom_changes(pending_request
->alpha2
))
1038 return REG_REQ_ALREADY_SET
;
1043 /* Device specific check */
1044 static bool reg_dev_ignore_cell_hint(struct wiphy
*wiphy
)
1046 return !(wiphy
->features
& NL80211_FEATURE_CELL_BASE_REG_HINTS
);
1049 static int reg_ignore_cell_hint(struct regulatory_request
*pending_request
)
1051 return REG_REQ_IGNORE
;
1054 static bool reg_dev_ignore_cell_hint(struct wiphy
*wiphy
)
1060 static bool wiphy_strict_alpha2_regd(struct wiphy
*wiphy
)
1062 if (wiphy
->regulatory_flags
& REGULATORY_STRICT_REG
&&
1063 !(wiphy
->regulatory_flags
& REGULATORY_CUSTOM_REG
))
1068 static bool ignore_reg_update(struct wiphy
*wiphy
,
1069 enum nl80211_reg_initiator initiator
)
1071 struct regulatory_request
*lr
= get_last_request();
1074 REG_DBG_PRINT("Ignoring regulatory request set by %s "
1075 "since last_request is not set\n",
1076 reg_initiator_name(initiator
));
1080 if (initiator
== NL80211_REGDOM_SET_BY_CORE
&&
1081 wiphy
->regulatory_flags
& REGULATORY_CUSTOM_REG
) {
1082 REG_DBG_PRINT("Ignoring regulatory request set by %s "
1083 "since the driver uses its own custom "
1084 "regulatory domain\n",
1085 reg_initiator_name(initiator
));
1090 * wiphy->regd will be set once the device has its own
1091 * desired regulatory domain set
1093 if (wiphy_strict_alpha2_regd(wiphy
) && !wiphy
->regd
&&
1094 initiator
!= NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
1095 !is_world_regdom(lr
->alpha2
)) {
1096 REG_DBG_PRINT("Ignoring regulatory request set by %s "
1097 "since the driver requires its own regulatory "
1098 "domain to be set first\n",
1099 reg_initiator_name(initiator
));
1103 if (reg_request_cell_base(lr
))
1104 return reg_dev_ignore_cell_hint(wiphy
);
1109 static bool reg_is_world_roaming(struct wiphy
*wiphy
)
1111 const struct ieee80211_regdomain
*cr
= get_cfg80211_regdom();
1112 const struct ieee80211_regdomain
*wr
= get_wiphy_regdom(wiphy
);
1113 struct regulatory_request
*lr
= get_last_request();
1115 if (is_world_regdom(cr
->alpha2
) || (wr
&& is_world_regdom(wr
->alpha2
)))
1118 if (lr
&& lr
->initiator
!= NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
1119 wiphy
->regulatory_flags
& REGULATORY_CUSTOM_REG
)
1125 static void handle_reg_beacon(struct wiphy
*wiphy
, unsigned int chan_idx
,
1126 struct reg_beacon
*reg_beacon
)
1128 struct ieee80211_supported_band
*sband
;
1129 struct ieee80211_channel
*chan
;
1130 bool channel_changed
= false;
1131 struct ieee80211_channel chan_before
;
1133 sband
= wiphy
->bands
[reg_beacon
->chan
.band
];
1134 chan
= &sband
->channels
[chan_idx
];
1136 if (likely(chan
->center_freq
!= reg_beacon
->chan
.center_freq
))
1139 if (chan
->beacon_found
)
1142 chan
->beacon_found
= true;
1144 if (!reg_is_world_roaming(wiphy
))
1147 if (wiphy
->regulatory_flags
& REGULATORY_DISABLE_BEACON_HINTS
)
1150 chan_before
.center_freq
= chan
->center_freq
;
1151 chan_before
.flags
= chan
->flags
;
1153 if (chan
->flags
& IEEE80211_CHAN_NO_IR
) {
1154 chan
->flags
&= ~IEEE80211_CHAN_NO_IR
;
1155 channel_changed
= true;
1158 if (channel_changed
)
1159 nl80211_send_beacon_hint_event(wiphy
, &chan_before
, chan
);
1163 * Called when a scan on a wiphy finds a beacon on
1166 static void wiphy_update_new_beacon(struct wiphy
*wiphy
,
1167 struct reg_beacon
*reg_beacon
)
1170 struct ieee80211_supported_band
*sband
;
1172 if (!wiphy
->bands
[reg_beacon
->chan
.band
])
1175 sband
= wiphy
->bands
[reg_beacon
->chan
.band
];
1177 for (i
= 0; i
< sband
->n_channels
; i
++)
1178 handle_reg_beacon(wiphy
, i
, reg_beacon
);
1182 * Called upon reg changes or a new wiphy is added
1184 static void wiphy_update_beacon_reg(struct wiphy
*wiphy
)
1187 struct ieee80211_supported_band
*sband
;
1188 struct reg_beacon
*reg_beacon
;
1190 list_for_each_entry(reg_beacon
, ®_beacon_list
, list
) {
1191 if (!wiphy
->bands
[reg_beacon
->chan
.band
])
1193 sband
= wiphy
->bands
[reg_beacon
->chan
.band
];
1194 for (i
= 0; i
< sband
->n_channels
; i
++)
1195 handle_reg_beacon(wiphy
, i
, reg_beacon
);
1199 /* Reap the advantages of previously found beacons */
1200 static void reg_process_beacons(struct wiphy
*wiphy
)
1203 * Means we are just firing up cfg80211, so no beacons would
1204 * have been processed yet.
1208 wiphy_update_beacon_reg(wiphy
);
1211 static bool is_ht40_allowed(struct ieee80211_channel
*chan
)
1215 if (chan
->flags
& IEEE80211_CHAN_DISABLED
)
1217 /* This would happen when regulatory rules disallow HT40 completely */
1218 if ((chan
->flags
& IEEE80211_CHAN_NO_HT40
) == IEEE80211_CHAN_NO_HT40
)
1223 static void reg_process_ht_flags_channel(struct wiphy
*wiphy
,
1224 struct ieee80211_channel
*channel
)
1226 struct ieee80211_supported_band
*sband
= wiphy
->bands
[channel
->band
];
1227 struct ieee80211_channel
*channel_before
= NULL
, *channel_after
= NULL
;
1230 if (!is_ht40_allowed(channel
)) {
1231 channel
->flags
|= IEEE80211_CHAN_NO_HT40
;
1236 * We need to ensure the extension channels exist to
1237 * be able to use HT40- or HT40+, this finds them (or not)
1239 for (i
= 0; i
< sband
->n_channels
; i
++) {
1240 struct ieee80211_channel
*c
= &sband
->channels
[i
];
1242 if (c
->center_freq
== (channel
->center_freq
- 20))
1244 if (c
->center_freq
== (channel
->center_freq
+ 20))
1249 * Please note that this assumes target bandwidth is 20 MHz,
1250 * if that ever changes we also need to change the below logic
1251 * to include that as well.
1253 if (!is_ht40_allowed(channel_before
))
1254 channel
->flags
|= IEEE80211_CHAN_NO_HT40MINUS
;
1256 channel
->flags
&= ~IEEE80211_CHAN_NO_HT40MINUS
;
1258 if (!is_ht40_allowed(channel_after
))
1259 channel
->flags
|= IEEE80211_CHAN_NO_HT40PLUS
;
1261 channel
->flags
&= ~IEEE80211_CHAN_NO_HT40PLUS
;
1264 static void reg_process_ht_flags_band(struct wiphy
*wiphy
,
1265 struct ieee80211_supported_band
*sband
)
1272 for (i
= 0; i
< sband
->n_channels
; i
++)
1273 reg_process_ht_flags_channel(wiphy
, &sband
->channels
[i
]);
1276 static void reg_process_ht_flags(struct wiphy
*wiphy
)
1278 enum ieee80211_band band
;
1283 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++)
1284 reg_process_ht_flags_band(wiphy
, wiphy
->bands
[band
]);
1287 static void reg_call_notifier(struct wiphy
*wiphy
,
1288 struct regulatory_request
*request
)
1290 if (wiphy
->reg_notifier
)
1291 wiphy
->reg_notifier(wiphy
, request
);
1294 static void wiphy_update_regulatory(struct wiphy
*wiphy
,
1295 enum nl80211_reg_initiator initiator
)
1297 enum ieee80211_band band
;
1298 struct regulatory_request
*lr
= get_last_request();
1300 if (ignore_reg_update(wiphy
, initiator
)) {
1302 * Regulatory updates set by CORE are ignored for custom
1303 * regulatory cards. Let us notify the changes to the driver,
1304 * as some drivers used this to restore its orig_* reg domain.
1306 if (initiator
== NL80211_REGDOM_SET_BY_CORE
&&
1307 wiphy
->regulatory_flags
& REGULATORY_CUSTOM_REG
)
1308 reg_call_notifier(wiphy
, lr
);
1312 lr
->dfs_region
= get_cfg80211_regdom()->dfs_region
;
1314 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++)
1315 handle_band(wiphy
, initiator
, wiphy
->bands
[band
]);
1317 reg_process_beacons(wiphy
);
1318 reg_process_ht_flags(wiphy
);
1319 reg_call_notifier(wiphy
, lr
);
1322 static void update_all_wiphy_regulatory(enum nl80211_reg_initiator initiator
)
1324 struct cfg80211_registered_device
*rdev
;
1325 struct wiphy
*wiphy
;
1329 list_for_each_entry(rdev
, &cfg80211_rdev_list
, list
) {
1330 wiphy
= &rdev
->wiphy
;
1331 wiphy_update_regulatory(wiphy
, initiator
);
1335 static void handle_channel_custom(struct wiphy
*wiphy
,
1336 struct ieee80211_channel
*chan
,
1337 const struct ieee80211_regdomain
*regd
)
1340 const struct ieee80211_reg_rule
*reg_rule
= NULL
;
1341 const struct ieee80211_power_rule
*power_rule
= NULL
;
1342 const struct ieee80211_freq_range
*freq_range
= NULL
;
1344 reg_rule
= freq_reg_info_regd(wiphy
, MHZ_TO_KHZ(chan
->center_freq
),
1347 if (IS_ERR(reg_rule
)) {
1348 REG_DBG_PRINT("Disabling freq %d MHz as custom regd has no rule that fits it\n",
1350 chan
->orig_flags
|= IEEE80211_CHAN_DISABLED
;
1351 chan
->flags
= chan
->orig_flags
;
1355 chan_reg_rule_print_dbg(chan
, reg_rule
);
1357 power_rule
= ®_rule
->power_rule
;
1358 freq_range
= ®_rule
->freq_range
;
1360 if (freq_range
->max_bandwidth_khz
< MHZ_TO_KHZ(40))
1361 bw_flags
= IEEE80211_CHAN_NO_HT40
;
1362 if (freq_range
->max_bandwidth_khz
< MHZ_TO_KHZ(80))
1363 bw_flags
|= IEEE80211_CHAN_NO_80MHZ
;
1364 if (freq_range
->max_bandwidth_khz
< MHZ_TO_KHZ(160))
1365 bw_flags
|= IEEE80211_CHAN_NO_160MHZ
;
1367 chan
->flags
|= map_regdom_flags(reg_rule
->flags
) | bw_flags
;
1368 chan
->max_antenna_gain
= (int) MBI_TO_DBI(power_rule
->max_antenna_gain
);
1369 chan
->max_reg_power
= chan
->max_power
=
1370 (int) MBM_TO_DBM(power_rule
->max_eirp
);
1373 static void handle_band_custom(struct wiphy
*wiphy
,
1374 struct ieee80211_supported_band
*sband
,
1375 const struct ieee80211_regdomain
*regd
)
1382 for (i
= 0; i
< sband
->n_channels
; i
++)
1383 handle_channel_custom(wiphy
, &sband
->channels
[i
], regd
);
1386 /* Used by drivers prior to wiphy registration */
1387 void wiphy_apply_custom_regulatory(struct wiphy
*wiphy
,
1388 const struct ieee80211_regdomain
*regd
)
1390 enum ieee80211_band band
;
1391 unsigned int bands_set
= 0;
1393 WARN(!(wiphy
->regulatory_flags
& REGULATORY_CUSTOM_REG
),
1394 "wiphy should have REGULATORY_CUSTOM_REG\n");
1395 wiphy
->regulatory_flags
|= REGULATORY_CUSTOM_REG
;
1397 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++) {
1398 if (!wiphy
->bands
[band
])
1400 handle_band_custom(wiphy
, wiphy
->bands
[band
], regd
);
1405 * no point in calling this if it won't have any effect
1406 * on your device's supported bands.
1408 WARN_ON(!bands_set
);
1410 EXPORT_SYMBOL(wiphy_apply_custom_regulatory
);
1412 static void reg_set_request_processed(void)
1414 bool need_more_processing
= false;
1415 struct regulatory_request
*lr
= get_last_request();
1417 lr
->processed
= true;
1419 spin_lock(®_requests_lock
);
1420 if (!list_empty(®_requests_list
))
1421 need_more_processing
= true;
1422 spin_unlock(®_requests_lock
);
1424 if (lr
->initiator
== NL80211_REGDOM_SET_BY_USER
)
1425 cancel_delayed_work(®_timeout
);
1427 if (need_more_processing
)
1428 schedule_work(®_work
);
1432 * reg_process_hint_core - process core regulatory requests
1433 * @pending_request: a pending core regulatory request
1435 * The wireless subsystem can use this function to process
1436 * a regulatory request issued by the regulatory core.
1438 * Returns one of the different reg request treatment values.
1440 static enum reg_request_treatment
1441 reg_process_hint_core(struct regulatory_request
*core_request
)
1444 core_request
->intersect
= false;
1445 core_request
->processed
= false;
1447 reg_update_last_request(core_request
);
1449 return reg_call_crda(core_request
);
1452 static enum reg_request_treatment
1453 __reg_process_hint_user(struct regulatory_request
*user_request
)
1455 struct regulatory_request
*lr
= get_last_request();
1457 if (reg_request_cell_base(user_request
))
1458 return reg_ignore_cell_hint(user_request
);
1460 if (reg_request_cell_base(lr
))
1461 return REG_REQ_IGNORE
;
1463 if (lr
->initiator
== NL80211_REGDOM_SET_BY_COUNTRY_IE
)
1464 return REG_REQ_INTERSECT
;
1466 * If the user knows better the user should set the regdom
1467 * to their country before the IE is picked up
1469 if (lr
->initiator
== NL80211_REGDOM_SET_BY_USER
&&
1471 return REG_REQ_IGNORE
;
1473 * Process user requests only after previous user/driver/core
1474 * requests have been processed
1476 if ((lr
->initiator
== NL80211_REGDOM_SET_BY_CORE
||
1477 lr
->initiator
== NL80211_REGDOM_SET_BY_DRIVER
||
1478 lr
->initiator
== NL80211_REGDOM_SET_BY_USER
) &&
1479 regdom_changes(lr
->alpha2
))
1480 return REG_REQ_IGNORE
;
1482 if (!regdom_changes(user_request
->alpha2
))
1483 return REG_REQ_ALREADY_SET
;
1489 * reg_process_hint_user - process user regulatory requests
1490 * @user_request: a pending user regulatory request
1492 * The wireless subsystem can use this function to process
1493 * a regulatory request initiated by userspace.
1495 * Returns one of the different reg request treatment values.
1497 static enum reg_request_treatment
1498 reg_process_hint_user(struct regulatory_request
*user_request
)
1500 enum reg_request_treatment treatment
;
1502 treatment
= __reg_process_hint_user(user_request
);
1503 if (treatment
== REG_REQ_IGNORE
||
1504 treatment
== REG_REQ_ALREADY_SET
) {
1505 kfree(user_request
);
1509 user_request
->intersect
= treatment
== REG_REQ_INTERSECT
;
1510 user_request
->processed
= false;
1512 reg_update_last_request(user_request
);
1514 user_alpha2
[0] = user_request
->alpha2
[0];
1515 user_alpha2
[1] = user_request
->alpha2
[1];
1517 return reg_call_crda(user_request
);
1520 static enum reg_request_treatment
1521 __reg_process_hint_driver(struct regulatory_request
*driver_request
)
1523 struct regulatory_request
*lr
= get_last_request();
1525 if (lr
->initiator
== NL80211_REGDOM_SET_BY_CORE
) {
1526 if (regdom_changes(driver_request
->alpha2
))
1528 return REG_REQ_ALREADY_SET
;
1532 * This would happen if you unplug and plug your card
1533 * back in or if you add a new device for which the previously
1534 * loaded card also agrees on the regulatory domain.
1536 if (lr
->initiator
== NL80211_REGDOM_SET_BY_DRIVER
&&
1537 !regdom_changes(driver_request
->alpha2
))
1538 return REG_REQ_ALREADY_SET
;
1540 return REG_REQ_INTERSECT
;
1544 * reg_process_hint_driver - process driver regulatory requests
1545 * @driver_request: a pending driver regulatory request
1547 * The wireless subsystem can use this function to process
1548 * a regulatory request issued by an 802.11 driver.
1550 * Returns one of the different reg request treatment values.
1552 static enum reg_request_treatment
1553 reg_process_hint_driver(struct wiphy
*wiphy
,
1554 struct regulatory_request
*driver_request
)
1556 const struct ieee80211_regdomain
*regd
;
1557 enum reg_request_treatment treatment
;
1559 treatment
= __reg_process_hint_driver(driver_request
);
1561 switch (treatment
) {
1564 case REG_REQ_IGNORE
:
1565 kfree(driver_request
);
1567 case REG_REQ_INTERSECT
:
1569 case REG_REQ_ALREADY_SET
:
1570 regd
= reg_copy_regd(get_cfg80211_regdom());
1572 kfree(driver_request
);
1573 return REG_REQ_IGNORE
;
1575 rcu_assign_pointer(wiphy
->regd
, regd
);
1579 driver_request
->intersect
= treatment
== REG_REQ_INTERSECT
;
1580 driver_request
->processed
= false;
1582 reg_update_last_request(driver_request
);
1585 * Since CRDA will not be called in this case as we already
1586 * have applied the requested regulatory domain before we just
1587 * inform userspace we have processed the request
1589 if (treatment
== REG_REQ_ALREADY_SET
) {
1590 nl80211_send_reg_change_event(driver_request
);
1591 reg_set_request_processed();
1595 return reg_call_crda(driver_request
);
1598 static enum reg_request_treatment
1599 __reg_process_hint_country_ie(struct wiphy
*wiphy
,
1600 struct regulatory_request
*country_ie_request
)
1602 struct wiphy
*last_wiphy
= NULL
;
1603 struct regulatory_request
*lr
= get_last_request();
1605 if (reg_request_cell_base(lr
)) {
1606 /* Trust a Cell base station over the AP's country IE */
1607 if (regdom_changes(country_ie_request
->alpha2
))
1608 return REG_REQ_IGNORE
;
1609 return REG_REQ_ALREADY_SET
;
1611 if (wiphy
->regulatory_flags
& REGULATORY_COUNTRY_IE_IGNORE
)
1612 return REG_REQ_IGNORE
;
1615 if (unlikely(!is_an_alpha2(country_ie_request
->alpha2
)))
1618 if (lr
->initiator
!= NL80211_REGDOM_SET_BY_COUNTRY_IE
)
1621 last_wiphy
= wiphy_idx_to_wiphy(lr
->wiphy_idx
);
1623 if (last_wiphy
!= wiphy
) {
1625 * Two cards with two APs claiming different
1626 * Country IE alpha2s. We could
1627 * intersect them, but that seems unlikely
1628 * to be correct. Reject second one for now.
1630 if (regdom_changes(country_ie_request
->alpha2
))
1631 return REG_REQ_IGNORE
;
1632 return REG_REQ_ALREADY_SET
;
1635 * Two consecutive Country IE hints on the same wiphy.
1636 * This should be picked up early by the driver/stack
1638 if (WARN_ON(regdom_changes(country_ie_request
->alpha2
)))
1640 return REG_REQ_ALREADY_SET
;
1644 * reg_process_hint_country_ie - process regulatory requests from country IEs
1645 * @country_ie_request: a regulatory request from a country IE
1647 * The wireless subsystem can use this function to process
1648 * a regulatory request issued by a country Information Element.
1650 * Returns one of the different reg request treatment values.
1652 static enum reg_request_treatment
1653 reg_process_hint_country_ie(struct wiphy
*wiphy
,
1654 struct regulatory_request
*country_ie_request
)
1656 enum reg_request_treatment treatment
;
1658 treatment
= __reg_process_hint_country_ie(wiphy
, country_ie_request
);
1660 switch (treatment
) {
1663 case REG_REQ_IGNORE
:
1665 case REG_REQ_ALREADY_SET
:
1666 kfree(country_ie_request
);
1668 case REG_REQ_INTERSECT
:
1669 kfree(country_ie_request
);
1671 * This doesn't happen yet, not sure we
1672 * ever want to support it for this case.
1674 WARN_ONCE(1, "Unexpected intersection for country IEs");
1675 return REG_REQ_IGNORE
;
1678 country_ie_request
->intersect
= false;
1679 country_ie_request
->processed
= false;
1681 reg_update_last_request(country_ie_request
);
1683 return reg_call_crda(country_ie_request
);
1686 /* This processes *all* regulatory hints */
1687 static void reg_process_hint(struct regulatory_request
*reg_request
)
1689 struct wiphy
*wiphy
= NULL
;
1690 enum reg_request_treatment treatment
;
1692 if (reg_request
->wiphy_idx
!= WIPHY_IDX_INVALID
)
1693 wiphy
= wiphy_idx_to_wiphy(reg_request
->wiphy_idx
);
1695 switch (reg_request
->initiator
) {
1696 case NL80211_REGDOM_SET_BY_CORE
:
1697 reg_process_hint_core(reg_request
);
1699 case NL80211_REGDOM_SET_BY_USER
:
1700 treatment
= reg_process_hint_user(reg_request
);
1701 if (treatment
== REG_REQ_OK
||
1702 treatment
== REG_REQ_ALREADY_SET
)
1704 schedule_delayed_work(®_timeout
, msecs_to_jiffies(3142));
1706 case NL80211_REGDOM_SET_BY_DRIVER
:
1709 treatment
= reg_process_hint_driver(wiphy
, reg_request
);
1711 case NL80211_REGDOM_SET_BY_COUNTRY_IE
:
1714 treatment
= reg_process_hint_country_ie(wiphy
, reg_request
);
1717 WARN(1, "invalid initiator %d\n", reg_request
->initiator
);
1721 /* This is required so that the orig_* parameters are saved */
1722 if (treatment
== REG_REQ_ALREADY_SET
&& wiphy
&&
1723 wiphy
->regulatory_flags
& REGULATORY_STRICT_REG
)
1724 wiphy_update_regulatory(wiphy
, reg_request
->initiator
);
1733 * Processes regulatory hints, this is all the NL80211_REGDOM_SET_BY_*
1734 * Regulatory hints come on a first come first serve basis and we
1735 * must process each one atomically.
1737 static void reg_process_pending_hints(void)
1739 struct regulatory_request
*reg_request
, *lr
;
1741 lr
= get_last_request();
1743 /* When last_request->processed becomes true this will be rescheduled */
1744 if (lr
&& !lr
->processed
) {
1745 REG_DBG_PRINT("Pending regulatory request, waiting for it to be processed...\n");
1749 spin_lock(®_requests_lock
);
1751 if (list_empty(®_requests_list
)) {
1752 spin_unlock(®_requests_lock
);
1756 reg_request
= list_first_entry(®_requests_list
,
1757 struct regulatory_request
,
1759 list_del_init(®_request
->list
);
1761 spin_unlock(®_requests_lock
);
1763 reg_process_hint(reg_request
);
1766 /* Processes beacon hints -- this has nothing to do with country IEs */
1767 static void reg_process_pending_beacon_hints(void)
1769 struct cfg80211_registered_device
*rdev
;
1770 struct reg_beacon
*pending_beacon
, *tmp
;
1772 /* This goes through the _pending_ beacon list */
1773 spin_lock_bh(®_pending_beacons_lock
);
1775 list_for_each_entry_safe(pending_beacon
, tmp
,
1776 ®_pending_beacons
, list
) {
1777 list_del_init(&pending_beacon
->list
);
1779 /* Applies the beacon hint to current wiphys */
1780 list_for_each_entry(rdev
, &cfg80211_rdev_list
, list
)
1781 wiphy_update_new_beacon(&rdev
->wiphy
, pending_beacon
);
1783 /* Remembers the beacon hint for new wiphys or reg changes */
1784 list_add_tail(&pending_beacon
->list
, ®_beacon_list
);
1787 spin_unlock_bh(®_pending_beacons_lock
);
1790 static void reg_todo(struct work_struct
*work
)
1793 reg_process_pending_hints();
1794 reg_process_pending_beacon_hints();
1798 static void queue_regulatory_request(struct regulatory_request
*request
)
1800 request
->alpha2
[0] = toupper(request
->alpha2
[0]);
1801 request
->alpha2
[1] = toupper(request
->alpha2
[1]);
1803 spin_lock(®_requests_lock
);
1804 list_add_tail(&request
->list
, ®_requests_list
);
1805 spin_unlock(®_requests_lock
);
1807 schedule_work(®_work
);
1811 * Core regulatory hint -- happens during cfg80211_init()
1812 * and when we restore regulatory settings.
1814 static int regulatory_hint_core(const char *alpha2
)
1816 struct regulatory_request
*request
;
1818 request
= kzalloc(sizeof(struct regulatory_request
), GFP_KERNEL
);
1822 request
->alpha2
[0] = alpha2
[0];
1823 request
->alpha2
[1] = alpha2
[1];
1824 request
->initiator
= NL80211_REGDOM_SET_BY_CORE
;
1826 queue_regulatory_request(request
);
1832 int regulatory_hint_user(const char *alpha2
,
1833 enum nl80211_user_reg_hint_type user_reg_hint_type
)
1835 struct regulatory_request
*request
;
1837 if (WARN_ON(!alpha2
))
1840 request
= kzalloc(sizeof(struct regulatory_request
), GFP_KERNEL
);
1844 request
->wiphy_idx
= WIPHY_IDX_INVALID
;
1845 request
->alpha2
[0] = alpha2
[0];
1846 request
->alpha2
[1] = alpha2
[1];
1847 request
->initiator
= NL80211_REGDOM_SET_BY_USER
;
1848 request
->user_reg_hint_type
= user_reg_hint_type
;
1850 queue_regulatory_request(request
);
1856 int regulatory_hint(struct wiphy
*wiphy
, const char *alpha2
)
1858 struct regulatory_request
*request
;
1860 if (WARN_ON(!alpha2
|| !wiphy
))
1863 wiphy
->regulatory_flags
&= ~REGULATORY_CUSTOM_REG
;
1865 request
= kzalloc(sizeof(struct regulatory_request
), GFP_KERNEL
);
1869 request
->wiphy_idx
= get_wiphy_idx(wiphy
);
1871 request
->alpha2
[0] = alpha2
[0];
1872 request
->alpha2
[1] = alpha2
[1];
1873 request
->initiator
= NL80211_REGDOM_SET_BY_DRIVER
;
1875 queue_regulatory_request(request
);
1879 EXPORT_SYMBOL(regulatory_hint
);
1881 void regulatory_hint_country_ie(struct wiphy
*wiphy
, enum ieee80211_band band
,
1882 const u8
*country_ie
, u8 country_ie_len
)
1885 enum environment_cap env
= ENVIRON_ANY
;
1886 struct regulatory_request
*request
= NULL
, *lr
;
1888 /* IE len must be evenly divisible by 2 */
1889 if (country_ie_len
& 0x01)
1892 if (country_ie_len
< IEEE80211_COUNTRY_IE_MIN_LEN
)
1895 request
= kzalloc(sizeof(*request
), GFP_KERNEL
);
1899 alpha2
[0] = country_ie
[0];
1900 alpha2
[1] = country_ie
[1];
1902 if (country_ie
[2] == 'I')
1903 env
= ENVIRON_INDOOR
;
1904 else if (country_ie
[2] == 'O')
1905 env
= ENVIRON_OUTDOOR
;
1908 lr
= get_last_request();
1914 * We will run this only upon a successful connection on cfg80211.
1915 * We leave conflict resolution to the workqueue, where can hold
1918 if (lr
->initiator
== NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
1919 lr
->wiphy_idx
!= WIPHY_IDX_INVALID
)
1922 request
->wiphy_idx
= get_wiphy_idx(wiphy
);
1923 request
->alpha2
[0] = alpha2
[0];
1924 request
->alpha2
[1] = alpha2
[1];
1925 request
->initiator
= NL80211_REGDOM_SET_BY_COUNTRY_IE
;
1926 request
->country_ie_env
= env
;
1928 queue_regulatory_request(request
);
1935 static void restore_alpha2(char *alpha2
, bool reset_user
)
1937 /* indicates there is no alpha2 to consider for restoration */
1941 /* The user setting has precedence over the module parameter */
1942 if (is_user_regdom_saved()) {
1943 /* Unless we're asked to ignore it and reset it */
1945 REG_DBG_PRINT("Restoring regulatory settings including user preference\n");
1946 user_alpha2
[0] = '9';
1947 user_alpha2
[1] = '7';
1950 * If we're ignoring user settings, we still need to
1951 * check the module parameter to ensure we put things
1952 * back as they were for a full restore.
1954 if (!is_world_regdom(ieee80211_regdom
)) {
1955 REG_DBG_PRINT("Keeping preference on module parameter ieee80211_regdom: %c%c\n",
1956 ieee80211_regdom
[0], ieee80211_regdom
[1]);
1957 alpha2
[0] = ieee80211_regdom
[0];
1958 alpha2
[1] = ieee80211_regdom
[1];
1961 REG_DBG_PRINT("Restoring regulatory settings while preserving user preference for: %c%c\n",
1962 user_alpha2
[0], user_alpha2
[1]);
1963 alpha2
[0] = user_alpha2
[0];
1964 alpha2
[1] = user_alpha2
[1];
1966 } else if (!is_world_regdom(ieee80211_regdom
)) {
1967 REG_DBG_PRINT("Keeping preference on module parameter ieee80211_regdom: %c%c\n",
1968 ieee80211_regdom
[0], ieee80211_regdom
[1]);
1969 alpha2
[0] = ieee80211_regdom
[0];
1970 alpha2
[1] = ieee80211_regdom
[1];
1972 REG_DBG_PRINT("Restoring regulatory settings\n");
1975 static void restore_custom_reg_settings(struct wiphy
*wiphy
)
1977 struct ieee80211_supported_band
*sband
;
1978 enum ieee80211_band band
;
1979 struct ieee80211_channel
*chan
;
1982 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++) {
1983 sband
= wiphy
->bands
[band
];
1986 for (i
= 0; i
< sband
->n_channels
; i
++) {
1987 chan
= &sband
->channels
[i
];
1988 chan
->flags
= chan
->orig_flags
;
1989 chan
->max_antenna_gain
= chan
->orig_mag
;
1990 chan
->max_power
= chan
->orig_mpwr
;
1991 chan
->beacon_found
= false;
1997 * Restoring regulatory settings involves ingoring any
1998 * possibly stale country IE information and user regulatory
1999 * settings if so desired, this includes any beacon hints
2000 * learned as we could have traveled outside to another country
2001 * after disconnection. To restore regulatory settings we do
2002 * exactly what we did at bootup:
2004 * - send a core regulatory hint
2005 * - send a user regulatory hint if applicable
2007 * Device drivers that send a regulatory hint for a specific country
2008 * keep their own regulatory domain on wiphy->regd so that does does
2009 * not need to be remembered.
2011 static void restore_regulatory_settings(bool reset_user
)
2014 char world_alpha2
[2];
2015 struct reg_beacon
*reg_beacon
, *btmp
;
2016 struct regulatory_request
*reg_request
, *tmp
;
2017 LIST_HEAD(tmp_reg_req_list
);
2018 struct cfg80211_registered_device
*rdev
;
2022 reset_regdomains(true, &world_regdom
);
2023 restore_alpha2(alpha2
, reset_user
);
2026 * If there's any pending requests we simply
2027 * stash them to a temporary pending queue and
2028 * add then after we've restored regulatory
2031 spin_lock(®_requests_lock
);
2032 list_for_each_entry_safe(reg_request
, tmp
, ®_requests_list
, list
) {
2033 if (reg_request
->initiator
!= NL80211_REGDOM_SET_BY_USER
)
2035 list_move_tail(®_request
->list
, &tmp_reg_req_list
);
2037 spin_unlock(®_requests_lock
);
2039 /* Clear beacon hints */
2040 spin_lock_bh(®_pending_beacons_lock
);
2041 list_for_each_entry_safe(reg_beacon
, btmp
, ®_pending_beacons
, list
) {
2042 list_del(®_beacon
->list
);
2045 spin_unlock_bh(®_pending_beacons_lock
);
2047 list_for_each_entry_safe(reg_beacon
, btmp
, ®_beacon_list
, list
) {
2048 list_del(®_beacon
->list
);
2052 /* First restore to the basic regulatory settings */
2053 world_alpha2
[0] = cfg80211_world_regdom
->alpha2
[0];
2054 world_alpha2
[1] = cfg80211_world_regdom
->alpha2
[1];
2056 list_for_each_entry(rdev
, &cfg80211_rdev_list
, list
) {
2057 if (rdev
->wiphy
.regulatory_flags
& REGULATORY_CUSTOM_REG
)
2058 restore_custom_reg_settings(&rdev
->wiphy
);
2061 regulatory_hint_core(world_alpha2
);
2064 * This restores the ieee80211_regdom module parameter
2065 * preference or the last user requested regulatory
2066 * settings, user regulatory settings takes precedence.
2068 if (is_an_alpha2(alpha2
))
2069 regulatory_hint_user(user_alpha2
, NL80211_USER_REG_HINT_USER
);
2071 spin_lock(®_requests_lock
);
2072 list_splice_tail_init(&tmp_reg_req_list
, ®_requests_list
);
2073 spin_unlock(®_requests_lock
);
2075 REG_DBG_PRINT("Kicking the queue\n");
2077 schedule_work(®_work
);
2080 void regulatory_hint_disconnect(void)
2082 REG_DBG_PRINT("All devices are disconnected, going to restore regulatory settings\n");
2083 restore_regulatory_settings(false);
2086 static bool freq_is_chan_12_13_14(u16 freq
)
2088 if (freq
== ieee80211_channel_to_frequency(12, IEEE80211_BAND_2GHZ
) ||
2089 freq
== ieee80211_channel_to_frequency(13, IEEE80211_BAND_2GHZ
) ||
2090 freq
== ieee80211_channel_to_frequency(14, IEEE80211_BAND_2GHZ
))
2095 static bool pending_reg_beacon(struct ieee80211_channel
*beacon_chan
)
2097 struct reg_beacon
*pending_beacon
;
2099 list_for_each_entry(pending_beacon
, ®_pending_beacons
, list
)
2100 if (beacon_chan
->center_freq
==
2101 pending_beacon
->chan
.center_freq
)
2106 int regulatory_hint_found_beacon(struct wiphy
*wiphy
,
2107 struct ieee80211_channel
*beacon_chan
,
2110 struct reg_beacon
*reg_beacon
;
2113 if (beacon_chan
->beacon_found
||
2114 beacon_chan
->flags
& IEEE80211_CHAN_RADAR
||
2115 (beacon_chan
->band
== IEEE80211_BAND_2GHZ
&&
2116 !freq_is_chan_12_13_14(beacon_chan
->center_freq
)))
2119 spin_lock_bh(®_pending_beacons_lock
);
2120 processing
= pending_reg_beacon(beacon_chan
);
2121 spin_unlock_bh(®_pending_beacons_lock
);
2126 reg_beacon
= kzalloc(sizeof(struct reg_beacon
), gfp
);
2130 REG_DBG_PRINT("Found new beacon on frequency: %d MHz (Ch %d) on %s\n",
2131 beacon_chan
->center_freq
,
2132 ieee80211_frequency_to_channel(beacon_chan
->center_freq
),
2135 memcpy(®_beacon
->chan
, beacon_chan
,
2136 sizeof(struct ieee80211_channel
));
2139 * Since we can be called from BH or and non-BH context
2140 * we must use spin_lock_bh()
2142 spin_lock_bh(®_pending_beacons_lock
);
2143 list_add_tail(®_beacon
->list
, ®_pending_beacons
);
2144 spin_unlock_bh(®_pending_beacons_lock
);
2146 schedule_work(®_work
);
2151 static void print_rd_rules(const struct ieee80211_regdomain
*rd
)
2154 const struct ieee80211_reg_rule
*reg_rule
= NULL
;
2155 const struct ieee80211_freq_range
*freq_range
= NULL
;
2156 const struct ieee80211_power_rule
*power_rule
= NULL
;
2158 pr_info(" (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)\n");
2160 for (i
= 0; i
< rd
->n_reg_rules
; i
++) {
2161 reg_rule
= &rd
->reg_rules
[i
];
2162 freq_range
= ®_rule
->freq_range
;
2163 power_rule
= ®_rule
->power_rule
;
2166 * There may not be documentation for max antenna gain
2167 * in certain regions
2169 if (power_rule
->max_antenna_gain
)
2170 pr_info(" (%d KHz - %d KHz @ %d KHz), (%d mBi, %d mBm)\n",
2171 freq_range
->start_freq_khz
,
2172 freq_range
->end_freq_khz
,
2173 freq_range
->max_bandwidth_khz
,
2174 power_rule
->max_antenna_gain
,
2175 power_rule
->max_eirp
);
2177 pr_info(" (%d KHz - %d KHz @ %d KHz), (N/A, %d mBm)\n",
2178 freq_range
->start_freq_khz
,
2179 freq_range
->end_freq_khz
,
2180 freq_range
->max_bandwidth_khz
,
2181 power_rule
->max_eirp
);
2185 bool reg_supported_dfs_region(enum nl80211_dfs_regions dfs_region
)
2187 switch (dfs_region
) {
2188 case NL80211_DFS_UNSET
:
2189 case NL80211_DFS_FCC
:
2190 case NL80211_DFS_ETSI
:
2191 case NL80211_DFS_JP
:
2194 REG_DBG_PRINT("Ignoring uknown DFS master region: %d\n",
2200 static void print_regdomain(const struct ieee80211_regdomain
*rd
)
2202 struct regulatory_request
*lr
= get_last_request();
2204 if (is_intersected_alpha2(rd
->alpha2
)) {
2205 if (lr
->initiator
== NL80211_REGDOM_SET_BY_COUNTRY_IE
) {
2206 struct cfg80211_registered_device
*rdev
;
2207 rdev
= cfg80211_rdev_by_wiphy_idx(lr
->wiphy_idx
);
2209 pr_info("Current regulatory domain updated by AP to: %c%c\n",
2210 rdev
->country_ie_alpha2
[0],
2211 rdev
->country_ie_alpha2
[1]);
2213 pr_info("Current regulatory domain intersected:\n");
2215 pr_info("Current regulatory domain intersected:\n");
2216 } else if (is_world_regdom(rd
->alpha2
)) {
2217 pr_info("World regulatory domain updated:\n");
2219 if (is_unknown_alpha2(rd
->alpha2
))
2220 pr_info("Regulatory domain changed to driver built-in settings (unknown country)\n");
2222 if (reg_request_cell_base(lr
))
2223 pr_info("Regulatory domain changed to country: %c%c by Cell Station\n",
2224 rd
->alpha2
[0], rd
->alpha2
[1]);
2226 pr_info("Regulatory domain changed to country: %c%c\n",
2227 rd
->alpha2
[0], rd
->alpha2
[1]);
2231 pr_info(" DFS Master region: %s", reg_dfs_region_str(rd
->dfs_region
));
2235 static void print_regdomain_info(const struct ieee80211_regdomain
*rd
)
2237 pr_info("Regulatory domain: %c%c\n", rd
->alpha2
[0], rd
->alpha2
[1]);
2241 static int reg_set_rd_core(const struct ieee80211_regdomain
*rd
)
2243 if (!is_world_regdom(rd
->alpha2
))
2245 update_world_regdomain(rd
);
2249 static int reg_set_rd_user(const struct ieee80211_regdomain
*rd
,
2250 struct regulatory_request
*user_request
)
2252 const struct ieee80211_regdomain
*intersected_rd
= NULL
;
2254 if (is_world_regdom(rd
->alpha2
))
2257 if (!regdom_changes(rd
->alpha2
))
2260 if (!is_valid_rd(rd
)) {
2261 pr_err("Invalid regulatory domain detected:\n");
2262 print_regdomain_info(rd
);
2266 if (!user_request
->intersect
) {
2267 reset_regdomains(false, rd
);
2271 intersected_rd
= regdom_intersect(rd
, get_cfg80211_regdom());
2272 if (!intersected_rd
)
2277 reset_regdomains(false, intersected_rd
);
2282 static int reg_set_rd_driver(const struct ieee80211_regdomain
*rd
,
2283 struct regulatory_request
*driver_request
)
2285 const struct ieee80211_regdomain
*regd
;
2286 const struct ieee80211_regdomain
*intersected_rd
= NULL
;
2287 const struct ieee80211_regdomain
*tmp
;
2288 struct wiphy
*request_wiphy
;
2290 if (is_world_regdom(rd
->alpha2
))
2293 if (!regdom_changes(rd
->alpha2
))
2296 if (!is_valid_rd(rd
)) {
2297 pr_err("Invalid regulatory domain detected:\n");
2298 print_regdomain_info(rd
);
2302 request_wiphy
= wiphy_idx_to_wiphy(driver_request
->wiphy_idx
);
2303 if (!request_wiphy
) {
2304 schedule_delayed_work(®_timeout
, 0);
2308 if (!driver_request
->intersect
) {
2309 if (request_wiphy
->regd
)
2312 regd
= reg_copy_regd(rd
);
2314 return PTR_ERR(regd
);
2316 rcu_assign_pointer(request_wiphy
->regd
, regd
);
2317 reset_regdomains(false, rd
);
2321 intersected_rd
= regdom_intersect(rd
, get_cfg80211_regdom());
2322 if (!intersected_rd
)
2326 * We can trash what CRDA provided now.
2327 * However if a driver requested this specific regulatory
2328 * domain we keep it for its private use
2330 tmp
= get_wiphy_regdom(request_wiphy
);
2331 rcu_assign_pointer(request_wiphy
->regd
, rd
);
2332 rcu_free_regdom(tmp
);
2336 reset_regdomains(false, intersected_rd
);
2341 static int reg_set_rd_country_ie(const struct ieee80211_regdomain
*rd
,
2342 struct regulatory_request
*country_ie_request
)
2344 struct wiphy
*request_wiphy
;
2346 if (!is_alpha2_set(rd
->alpha2
) && !is_an_alpha2(rd
->alpha2
) &&
2347 !is_unknown_alpha2(rd
->alpha2
))
2351 * Lets only bother proceeding on the same alpha2 if the current
2352 * rd is non static (it means CRDA was present and was used last)
2353 * and the pending request came in from a country IE
2356 if (!is_valid_rd(rd
)) {
2357 pr_err("Invalid regulatory domain detected:\n");
2358 print_regdomain_info(rd
);
2362 request_wiphy
= wiphy_idx_to_wiphy(country_ie_request
->wiphy_idx
);
2363 if (!request_wiphy
) {
2364 schedule_delayed_work(®_timeout
, 0);
2368 if (country_ie_request
->intersect
)
2371 reset_regdomains(false, rd
);
2376 * Use this call to set the current regulatory domain. Conflicts with
2377 * multiple drivers can be ironed out later. Caller must've already
2378 * kmalloc'd the rd structure.
2380 int set_regdom(const struct ieee80211_regdomain
*rd
)
2382 struct regulatory_request
*lr
;
2385 if (!reg_is_valid_request(rd
->alpha2
)) {
2390 lr
= get_last_request();
2392 /* Note that this doesn't update the wiphys, this is done below */
2393 switch (lr
->initiator
) {
2394 case NL80211_REGDOM_SET_BY_CORE
:
2395 r
= reg_set_rd_core(rd
);
2397 case NL80211_REGDOM_SET_BY_USER
:
2398 r
= reg_set_rd_user(rd
, lr
);
2400 case NL80211_REGDOM_SET_BY_DRIVER
:
2401 r
= reg_set_rd_driver(rd
, lr
);
2403 case NL80211_REGDOM_SET_BY_COUNTRY_IE
:
2404 r
= reg_set_rd_country_ie(rd
, lr
);
2407 WARN(1, "invalid initiator %d\n", lr
->initiator
);
2413 reg_set_request_processed();
2419 /* This would make this whole thing pointless */
2420 if (WARN_ON(!lr
->intersect
&& rd
!= get_cfg80211_regdom()))
2423 /* update all wiphys now with the new established regulatory domain */
2424 update_all_wiphy_regulatory(lr
->initiator
);
2426 print_regdomain(get_cfg80211_regdom());
2428 nl80211_send_reg_change_event(lr
);
2430 reg_set_request_processed();
2435 int reg_device_uevent(struct device
*dev
, struct kobj_uevent_env
*env
)
2437 struct regulatory_request
*lr
;
2442 lr
= get_last_request();
2443 if (lr
&& !lr
->processed
) {
2444 memcpy(alpha2
, lr
->alpha2
, 2);
2450 return add_uevent_var(env
, "COUNTRY=%c%c",
2451 alpha2
[0], alpha2
[1]);
2455 void wiphy_regulatory_register(struct wiphy
*wiphy
)
2457 struct regulatory_request
*lr
;
2459 if (!reg_dev_ignore_cell_hint(wiphy
))
2460 reg_num_devs_support_basehint
++;
2462 lr
= get_last_request();
2463 wiphy_update_regulatory(wiphy
, lr
->initiator
);
2466 void wiphy_regulatory_deregister(struct wiphy
*wiphy
)
2468 struct wiphy
*request_wiphy
= NULL
;
2469 struct regulatory_request
*lr
;
2471 lr
= get_last_request();
2473 if (!reg_dev_ignore_cell_hint(wiphy
))
2474 reg_num_devs_support_basehint
--;
2476 rcu_free_regdom(get_wiphy_regdom(wiphy
));
2477 rcu_assign_pointer(wiphy
->regd
, NULL
);
2480 request_wiphy
= wiphy_idx_to_wiphy(lr
->wiphy_idx
);
2482 if (!request_wiphy
|| request_wiphy
!= wiphy
)
2485 lr
->wiphy_idx
= WIPHY_IDX_INVALID
;
2486 lr
->country_ie_env
= ENVIRON_ANY
;
2489 static void reg_timeout_work(struct work_struct
*work
)
2491 REG_DBG_PRINT("Timeout while waiting for CRDA to reply, restoring regulatory settings\n");
2493 restore_regulatory_settings(true);
2497 int __init
regulatory_init(void)
2501 reg_pdev
= platform_device_register_simple("regulatory", 0, NULL
, 0);
2502 if (IS_ERR(reg_pdev
))
2503 return PTR_ERR(reg_pdev
);
2505 reg_pdev
->dev
.type
= ®_device_type
;
2507 spin_lock_init(®_requests_lock
);
2508 spin_lock_init(®_pending_beacons_lock
);
2510 reg_regdb_size_check();
2512 rcu_assign_pointer(cfg80211_regdomain
, cfg80211_world_regdom
);
2514 user_alpha2
[0] = '9';
2515 user_alpha2
[1] = '7';
2517 /* We always try to get an update for the static regdomain */
2518 err
= regulatory_hint_core(cfg80211_world_regdom
->alpha2
);
2523 * N.B. kobject_uevent_env() can fail mainly for when we're out
2524 * memory which is handled and propagated appropriately above
2525 * but it can also fail during a netlink_broadcast() or during
2526 * early boot for call_usermodehelper(). For now treat these
2527 * errors as non-fatal.
2529 pr_err("kobject_uevent_env() was unable to call CRDA during init\n");
2533 * Finally, if the user set the module parameter treat it
2536 if (!is_world_regdom(ieee80211_regdom
))
2537 regulatory_hint_user(ieee80211_regdom
,
2538 NL80211_USER_REG_HINT_USER
);
2543 void regulatory_exit(void)
2545 struct regulatory_request
*reg_request
, *tmp
;
2546 struct reg_beacon
*reg_beacon
, *btmp
;
2548 cancel_work_sync(®_work
);
2549 cancel_delayed_work_sync(®_timeout
);
2551 /* Lock to suppress warnings */
2553 reset_regdomains(true, NULL
);
2556 dev_set_uevent_suppress(®_pdev
->dev
, true);
2558 platform_device_unregister(reg_pdev
);
2560 list_for_each_entry_safe(reg_beacon
, btmp
, ®_pending_beacons
, list
) {
2561 list_del(®_beacon
->list
);
2565 list_for_each_entry_safe(reg_beacon
, btmp
, ®_beacon_list
, list
) {
2566 list_del(®_beacon
->list
);
2570 list_for_each_entry_safe(reg_request
, tmp
, ®_requests_list
, list
) {
2571 list_del(®_request
->list
);