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...)
69 * enum reg_request_treatment - regulatory request treatment
71 * @REG_REQ_OK: continue processing the regulatory request
72 * @REG_REQ_IGNORE: ignore the regulatory request
73 * @REG_REQ_INTERSECT: the regulatory domain resulting from this request should
74 * be intersected with the current one.
75 * @REG_REQ_ALREADY_SET: the regulatory request will not change the current
76 * regulatory settings, and no further processing is required.
77 * @REG_REQ_USER_HINT_HANDLED: a non alpha2 user hint was handled and no
78 * further processing is required, i.e., not need to update last_request
79 * etc. This should be used for user hints that do not provide an alpha2
80 * but some other type of regulatory hint, i.e., indoor operation.
82 enum reg_request_treatment
{
87 REG_REQ_USER_HINT_HANDLED
,
90 static struct regulatory_request core_request_world
= {
91 .initiator
= NL80211_REGDOM_SET_BY_CORE
,
96 .country_ie_env
= ENVIRON_ANY
,
100 * Receipt of information from last regulatory request,
101 * protected by RTNL (and can be accessed with RCU protection)
103 static struct regulatory_request __rcu
*last_request
=
104 (void __rcu
*)&core_request_world
;
106 /* To trigger userspace events */
107 static struct platform_device
*reg_pdev
;
110 * Central wireless core regulatory domains, we only need two,
111 * the current one and a world regulatory domain in case we have no
112 * information to give us an alpha2.
113 * (protected by RTNL, can be read under RCU)
115 const struct ieee80211_regdomain __rcu
*cfg80211_regdomain
;
118 * Number of devices that registered to the core
119 * that support cellular base station regulatory hints
120 * (protected by RTNL)
122 static int reg_num_devs_support_basehint
;
125 * State variable indicating if the platform on which the devices
126 * are attached is operating in an indoor environment. The state variable
127 * is relevant for all registered devices.
128 * (protected by RTNL)
130 static bool reg_is_indoor
;
132 static const struct ieee80211_regdomain
*get_cfg80211_regdom(void)
134 return rtnl_dereference(cfg80211_regdomain
);
137 static const struct ieee80211_regdomain
*get_wiphy_regdom(struct wiphy
*wiphy
)
139 return rtnl_dereference(wiphy
->regd
);
142 static const char *reg_dfs_region_str(enum nl80211_dfs_regions dfs_region
)
144 switch (dfs_region
) {
145 case NL80211_DFS_UNSET
:
147 case NL80211_DFS_FCC
:
149 case NL80211_DFS_ETSI
:
157 enum nl80211_dfs_regions
reg_get_dfs_region(struct wiphy
*wiphy
)
159 const struct ieee80211_regdomain
*regd
= NULL
;
160 const struct ieee80211_regdomain
*wiphy_regd
= NULL
;
162 regd
= get_cfg80211_regdom();
166 wiphy_regd
= get_wiphy_regdom(wiphy
);
170 if (wiphy_regd
->dfs_region
== regd
->dfs_region
)
173 REG_DBG_PRINT("%s: device specific dfs_region "
174 "(%s) disagrees with cfg80211's "
175 "central dfs_region (%s)\n",
176 dev_name(&wiphy
->dev
),
177 reg_dfs_region_str(wiphy_regd
->dfs_region
),
178 reg_dfs_region_str(regd
->dfs_region
));
181 return regd
->dfs_region
;
184 static void rcu_free_regdom(const struct ieee80211_regdomain
*r
)
188 kfree_rcu((struct ieee80211_regdomain
*)r
, rcu_head
);
191 static struct regulatory_request
*get_last_request(void)
193 return rcu_dereference_rtnl(last_request
);
196 /* Used to queue up regulatory hints */
197 static LIST_HEAD(reg_requests_list
);
198 static spinlock_t reg_requests_lock
;
200 /* Used to queue up beacon hints for review */
201 static LIST_HEAD(reg_pending_beacons
);
202 static spinlock_t reg_pending_beacons_lock
;
204 /* Used to keep track of processed beacon hints */
205 static LIST_HEAD(reg_beacon_list
);
208 struct list_head list
;
209 struct ieee80211_channel chan
;
212 static void reg_todo(struct work_struct
*work
);
213 static DECLARE_WORK(reg_work
, reg_todo
);
215 static void reg_timeout_work(struct work_struct
*work
);
216 static DECLARE_DELAYED_WORK(reg_timeout
, reg_timeout_work
);
218 /* We keep a static world regulatory domain in case of the absence of CRDA */
219 static const struct ieee80211_regdomain world_regdom
= {
223 /* IEEE 802.11b/g, channels 1..11 */
224 REG_RULE(2412-10, 2462+10, 40, 6, 20, 0),
225 /* IEEE 802.11b/g, channels 12..13. */
226 REG_RULE(2467-10, 2472+10, 40, 6, 20,
228 /* IEEE 802.11 channel 14 - Only JP enables
229 * this and for 802.11b only */
230 REG_RULE(2484-10, 2484+10, 20, 6, 20,
232 NL80211_RRF_NO_OFDM
),
233 /* IEEE 802.11a, channel 36..48 */
234 REG_RULE(5180-10, 5240+10, 160, 6, 20,
237 /* IEEE 802.11a, channel 52..64 - DFS required */
238 REG_RULE(5260-10, 5320+10, 160, 6, 20,
242 /* IEEE 802.11a, channel 100..144 - DFS required */
243 REG_RULE(5500-10, 5720+10, 160, 6, 20,
247 /* IEEE 802.11a, channel 149..165 */
248 REG_RULE(5745-10, 5825+10, 80, 6, 20,
251 /* IEEE 802.11ad (60gHz), channels 1..3 */
252 REG_RULE(56160+2160*1-1080, 56160+2160*3+1080, 2160, 0, 0, 0),
256 /* protected by RTNL */
257 static const struct ieee80211_regdomain
*cfg80211_world_regdom
=
260 static char *ieee80211_regdom
= "00";
261 static char user_alpha2
[2];
263 module_param(ieee80211_regdom
, charp
, 0444);
264 MODULE_PARM_DESC(ieee80211_regdom
, "IEEE 802.11 regulatory domain code");
266 static void reg_free_request(struct regulatory_request
*request
)
268 if (request
!= get_last_request())
272 static void reg_free_last_request(void)
274 struct regulatory_request
*lr
= get_last_request();
276 if (lr
!= &core_request_world
&& lr
)
277 kfree_rcu(lr
, rcu_head
);
280 static void reg_update_last_request(struct regulatory_request
*request
)
282 struct regulatory_request
*lr
;
284 lr
= get_last_request();
288 reg_free_last_request();
289 rcu_assign_pointer(last_request
, request
);
292 static void reset_regdomains(bool full_reset
,
293 const struct ieee80211_regdomain
*new_regdom
)
295 const struct ieee80211_regdomain
*r
;
299 r
= get_cfg80211_regdom();
301 /* avoid freeing static information or freeing something twice */
302 if (r
== cfg80211_world_regdom
)
304 if (cfg80211_world_regdom
== &world_regdom
)
305 cfg80211_world_regdom
= NULL
;
306 if (r
== &world_regdom
)
310 rcu_free_regdom(cfg80211_world_regdom
);
312 cfg80211_world_regdom
= &world_regdom
;
313 rcu_assign_pointer(cfg80211_regdomain
, new_regdom
);
318 reg_update_last_request(&core_request_world
);
322 * Dynamic world regulatory domain requested by the wireless
323 * core upon initialization
325 static void update_world_regdomain(const struct ieee80211_regdomain
*rd
)
327 struct regulatory_request
*lr
;
329 lr
= get_last_request();
333 reset_regdomains(false, rd
);
335 cfg80211_world_regdom
= rd
;
338 bool is_world_regdom(const char *alpha2
)
342 return alpha2
[0] == '0' && alpha2
[1] == '0';
345 static bool is_alpha2_set(const char *alpha2
)
349 return alpha2
[0] && alpha2
[1];
352 static bool is_unknown_alpha2(const char *alpha2
)
357 * Special case where regulatory domain was built by driver
358 * but a specific alpha2 cannot be determined
360 return alpha2
[0] == '9' && alpha2
[1] == '9';
363 static bool is_intersected_alpha2(const char *alpha2
)
368 * Special case where regulatory domain is the
369 * result of an intersection between two regulatory domain
372 return alpha2
[0] == '9' && alpha2
[1] == '8';
375 static bool is_an_alpha2(const char *alpha2
)
379 return isalpha(alpha2
[0]) && isalpha(alpha2
[1]);
382 static bool alpha2_equal(const char *alpha2_x
, const char *alpha2_y
)
384 if (!alpha2_x
|| !alpha2_y
)
386 return alpha2_x
[0] == alpha2_y
[0] && alpha2_x
[1] == alpha2_y
[1];
389 static bool regdom_changes(const char *alpha2
)
391 const struct ieee80211_regdomain
*r
= get_cfg80211_regdom();
395 return !alpha2_equal(r
->alpha2
, alpha2
);
399 * The NL80211_REGDOM_SET_BY_USER regdom alpha2 is cached, this lets
400 * you know if a valid regulatory hint with NL80211_REGDOM_SET_BY_USER
401 * has ever been issued.
403 static bool is_user_regdom_saved(void)
405 if (user_alpha2
[0] == '9' && user_alpha2
[1] == '7')
408 /* This would indicate a mistake on the design */
409 if (WARN(!is_world_regdom(user_alpha2
) && !is_an_alpha2(user_alpha2
),
410 "Unexpected user alpha2: %c%c\n",
411 user_alpha2
[0], user_alpha2
[1]))
417 static const struct ieee80211_regdomain
*
418 reg_copy_regd(const struct ieee80211_regdomain
*src_regd
)
420 struct ieee80211_regdomain
*regd
;
425 sizeof(struct ieee80211_regdomain
) +
426 src_regd
->n_reg_rules
* sizeof(struct ieee80211_reg_rule
);
428 regd
= kzalloc(size_of_regd
, GFP_KERNEL
);
430 return ERR_PTR(-ENOMEM
);
432 memcpy(regd
, src_regd
, sizeof(struct ieee80211_regdomain
));
434 for (i
= 0; i
< src_regd
->n_reg_rules
; i
++)
435 memcpy(®d
->reg_rules
[i
], &src_regd
->reg_rules
[i
],
436 sizeof(struct ieee80211_reg_rule
));
441 #ifdef CONFIG_CFG80211_INTERNAL_REGDB
442 struct reg_regdb_search_request
{
444 struct list_head list
;
447 static LIST_HEAD(reg_regdb_search_list
);
448 static DEFINE_MUTEX(reg_regdb_search_mutex
);
450 static void reg_regdb_search(struct work_struct
*work
)
452 struct reg_regdb_search_request
*request
;
453 const struct ieee80211_regdomain
*curdom
, *regdom
= NULL
;
458 mutex_lock(®_regdb_search_mutex
);
459 while (!list_empty(®_regdb_search_list
)) {
460 request
= list_first_entry(®_regdb_search_list
,
461 struct reg_regdb_search_request
,
463 list_del(&request
->list
);
465 for (i
= 0; i
< reg_regdb_size
; i
++) {
466 curdom
= reg_regdb
[i
];
468 if (alpha2_equal(request
->alpha2
, curdom
->alpha2
)) {
469 regdom
= reg_copy_regd(curdom
);
476 mutex_unlock(®_regdb_search_mutex
);
478 if (!IS_ERR_OR_NULL(regdom
))
484 static DECLARE_WORK(reg_regdb_work
, reg_regdb_search
);
486 static void reg_regdb_query(const char *alpha2
)
488 struct reg_regdb_search_request
*request
;
493 request
= kzalloc(sizeof(struct reg_regdb_search_request
), GFP_KERNEL
);
497 memcpy(request
->alpha2
, alpha2
, 2);
499 mutex_lock(®_regdb_search_mutex
);
500 list_add_tail(&request
->list
, ®_regdb_search_list
);
501 mutex_unlock(®_regdb_search_mutex
);
503 schedule_work(®_regdb_work
);
506 /* Feel free to add any other sanity checks here */
507 static void reg_regdb_size_check(void)
509 /* We should ideally BUILD_BUG_ON() but then random builds would fail */
510 WARN_ONCE(!reg_regdb_size
, "db.txt is empty, you should update it...");
513 static inline void reg_regdb_size_check(void) {}
514 static inline void reg_regdb_query(const char *alpha2
) {}
515 #endif /* CONFIG_CFG80211_INTERNAL_REGDB */
518 * This lets us keep regulatory code which is updated on a regulatory
519 * basis in userspace.
521 static int call_crda(const char *alpha2
)
524 char *env
[] = { country
, NULL
};
526 snprintf(country
, sizeof(country
), "COUNTRY=%c%c",
527 alpha2
[0], alpha2
[1]);
529 if (!is_world_regdom((char *) alpha2
))
530 pr_info("Calling CRDA for country: %c%c\n",
531 alpha2
[0], alpha2
[1]);
533 pr_info("Calling CRDA to update world regulatory domain\n");
535 /* query internal regulatory database (if it exists) */
536 reg_regdb_query(alpha2
);
538 return kobject_uevent_env(®_pdev
->dev
.kobj
, KOBJ_CHANGE
, env
);
541 static enum reg_request_treatment
542 reg_call_crda(struct regulatory_request
*request
)
544 if (call_crda(request
->alpha2
))
545 return REG_REQ_IGNORE
;
549 bool reg_is_valid_request(const char *alpha2
)
551 struct regulatory_request
*lr
= get_last_request();
553 if (!lr
|| lr
->processed
)
556 return alpha2_equal(lr
->alpha2
, alpha2
);
559 static const struct ieee80211_regdomain
*reg_get_regdomain(struct wiphy
*wiphy
)
561 struct regulatory_request
*lr
= get_last_request();
564 * Follow the driver's regulatory domain, if present, unless a country
565 * IE has been processed or a user wants to help complaince further
567 if (lr
->initiator
!= NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
568 lr
->initiator
!= NL80211_REGDOM_SET_BY_USER
&&
570 return get_wiphy_regdom(wiphy
);
572 return get_cfg80211_regdom();
575 unsigned int reg_get_max_bandwidth(const struct ieee80211_regdomain
*rd
,
576 const struct ieee80211_reg_rule
*rule
)
578 const struct ieee80211_freq_range
*freq_range
= &rule
->freq_range
;
579 const struct ieee80211_freq_range
*freq_range_tmp
;
580 const struct ieee80211_reg_rule
*tmp
;
581 u32 start_freq
, end_freq
, idx
, no
;
583 for (idx
= 0; idx
< rd
->n_reg_rules
; idx
++)
584 if (rule
== &rd
->reg_rules
[idx
])
587 if (idx
== rd
->n_reg_rules
)
594 tmp
= &rd
->reg_rules
[--no
];
595 freq_range_tmp
= &tmp
->freq_range
;
597 if (freq_range_tmp
->end_freq_khz
< freq_range
->start_freq_khz
)
600 freq_range
= freq_range_tmp
;
603 start_freq
= freq_range
->start_freq_khz
;
606 freq_range
= &rule
->freq_range
;
609 while (no
< rd
->n_reg_rules
- 1) {
610 tmp
= &rd
->reg_rules
[++no
];
611 freq_range_tmp
= &tmp
->freq_range
;
613 if (freq_range_tmp
->start_freq_khz
> freq_range
->end_freq_khz
)
616 freq_range
= freq_range_tmp
;
619 end_freq
= freq_range
->end_freq_khz
;
621 return end_freq
- start_freq
;
624 /* Sanity check on a regulatory rule */
625 static bool is_valid_reg_rule(const struct ieee80211_reg_rule
*rule
)
627 const struct ieee80211_freq_range
*freq_range
= &rule
->freq_range
;
630 if (freq_range
->start_freq_khz
<= 0 || freq_range
->end_freq_khz
<= 0)
633 if (freq_range
->start_freq_khz
> freq_range
->end_freq_khz
)
636 freq_diff
= freq_range
->end_freq_khz
- freq_range
->start_freq_khz
;
638 if (freq_range
->end_freq_khz
<= freq_range
->start_freq_khz
||
639 freq_range
->max_bandwidth_khz
> freq_diff
)
645 static bool is_valid_rd(const struct ieee80211_regdomain
*rd
)
647 const struct ieee80211_reg_rule
*reg_rule
= NULL
;
650 if (!rd
->n_reg_rules
)
653 if (WARN_ON(rd
->n_reg_rules
> NL80211_MAX_SUPP_REG_RULES
))
656 for (i
= 0; i
< rd
->n_reg_rules
; i
++) {
657 reg_rule
= &rd
->reg_rules
[i
];
658 if (!is_valid_reg_rule(reg_rule
))
665 static bool reg_does_bw_fit(const struct ieee80211_freq_range
*freq_range
,
666 u32 center_freq_khz
, u32 bw_khz
)
668 u32 start_freq_khz
, end_freq_khz
;
670 start_freq_khz
= center_freq_khz
- (bw_khz
/2);
671 end_freq_khz
= center_freq_khz
+ (bw_khz
/2);
673 if (start_freq_khz
>= freq_range
->start_freq_khz
&&
674 end_freq_khz
<= freq_range
->end_freq_khz
)
681 * freq_in_rule_band - tells us if a frequency is in a frequency band
682 * @freq_range: frequency rule we want to query
683 * @freq_khz: frequency we are inquiring about
685 * This lets us know if a specific frequency rule is or is not relevant to
686 * a specific frequency's band. Bands are device specific and artificial
687 * definitions (the "2.4 GHz band", the "5 GHz band" and the "60GHz band"),
688 * however it is safe for now to assume that a frequency rule should not be
689 * part of a frequency's band if the start freq or end freq are off by more
690 * than 2 GHz for the 2.4 and 5 GHz bands, and by more than 10 GHz for the
692 * This resolution can be lowered and should be considered as we add
693 * regulatory rule support for other "bands".
695 static bool freq_in_rule_band(const struct ieee80211_freq_range
*freq_range
,
698 #define ONE_GHZ_IN_KHZ 1000000
700 * From 802.11ad: directional multi-gigabit (DMG):
701 * Pertaining to operation in a frequency band containing a channel
702 * with the Channel starting frequency above 45 GHz.
704 u32 limit
= freq_khz
> 45 * ONE_GHZ_IN_KHZ
?
705 10 * ONE_GHZ_IN_KHZ
: 2 * ONE_GHZ_IN_KHZ
;
706 if (abs(freq_khz
- freq_range
->start_freq_khz
) <= limit
)
708 if (abs(freq_khz
- freq_range
->end_freq_khz
) <= limit
)
711 #undef ONE_GHZ_IN_KHZ
715 * Later on we can perhaps use the more restrictive DFS
716 * region but we don't have information for that yet so
717 * for now simply disallow conflicts.
719 static enum nl80211_dfs_regions
720 reg_intersect_dfs_region(const enum nl80211_dfs_regions dfs_region1
,
721 const enum nl80211_dfs_regions dfs_region2
)
723 if (dfs_region1
!= dfs_region2
)
724 return NL80211_DFS_UNSET
;
729 * Helper for regdom_intersect(), this does the real
730 * mathematical intersection fun
732 static int reg_rules_intersect(const struct ieee80211_regdomain
*rd1
,
733 const struct ieee80211_regdomain
*rd2
,
734 const struct ieee80211_reg_rule
*rule1
,
735 const struct ieee80211_reg_rule
*rule2
,
736 struct ieee80211_reg_rule
*intersected_rule
)
738 const struct ieee80211_freq_range
*freq_range1
, *freq_range2
;
739 struct ieee80211_freq_range
*freq_range
;
740 const struct ieee80211_power_rule
*power_rule1
, *power_rule2
;
741 struct ieee80211_power_rule
*power_rule
;
742 u32 freq_diff
, max_bandwidth1
, max_bandwidth2
;
744 freq_range1
= &rule1
->freq_range
;
745 freq_range2
= &rule2
->freq_range
;
746 freq_range
= &intersected_rule
->freq_range
;
748 power_rule1
= &rule1
->power_rule
;
749 power_rule2
= &rule2
->power_rule
;
750 power_rule
= &intersected_rule
->power_rule
;
752 freq_range
->start_freq_khz
= max(freq_range1
->start_freq_khz
,
753 freq_range2
->start_freq_khz
);
754 freq_range
->end_freq_khz
= min(freq_range1
->end_freq_khz
,
755 freq_range2
->end_freq_khz
);
757 max_bandwidth1
= freq_range1
->max_bandwidth_khz
;
758 max_bandwidth2
= freq_range2
->max_bandwidth_khz
;
760 if (rule1
->flags
& NL80211_RRF_AUTO_BW
)
761 max_bandwidth1
= reg_get_max_bandwidth(rd1
, rule1
);
762 if (rule2
->flags
& NL80211_RRF_AUTO_BW
)
763 max_bandwidth2
= reg_get_max_bandwidth(rd2
, rule2
);
765 freq_range
->max_bandwidth_khz
= min(max_bandwidth1
, max_bandwidth2
);
767 intersected_rule
->flags
= rule1
->flags
| rule2
->flags
;
770 * In case NL80211_RRF_AUTO_BW requested for both rules
771 * set AUTO_BW in intersected rule also. Next we will
772 * calculate BW correctly in handle_channel function.
773 * In other case remove AUTO_BW flag while we calculate
774 * maximum bandwidth correctly and auto calculation is
777 if ((rule1
->flags
& NL80211_RRF_AUTO_BW
) &&
778 (rule2
->flags
& NL80211_RRF_AUTO_BW
))
779 intersected_rule
->flags
|= NL80211_RRF_AUTO_BW
;
781 intersected_rule
->flags
&= ~NL80211_RRF_AUTO_BW
;
783 freq_diff
= freq_range
->end_freq_khz
- freq_range
->start_freq_khz
;
784 if (freq_range
->max_bandwidth_khz
> freq_diff
)
785 freq_range
->max_bandwidth_khz
= freq_diff
;
787 power_rule
->max_eirp
= min(power_rule1
->max_eirp
,
788 power_rule2
->max_eirp
);
789 power_rule
->max_antenna_gain
= min(power_rule1
->max_antenna_gain
,
790 power_rule2
->max_antenna_gain
);
792 intersected_rule
->dfs_cac_ms
= max(rule1
->dfs_cac_ms
,
795 if (!is_valid_reg_rule(intersected_rule
))
802 * regdom_intersect - do the intersection between two regulatory domains
803 * @rd1: first regulatory domain
804 * @rd2: second regulatory domain
806 * Use this function to get the intersection between two regulatory domains.
807 * Once completed we will mark the alpha2 for the rd as intersected, "98",
808 * as no one single alpha2 can represent this regulatory domain.
810 * Returns a pointer to the regulatory domain structure which will hold the
811 * resulting intersection of rules between rd1 and rd2. We will
812 * kzalloc() this structure for you.
814 static struct ieee80211_regdomain
*
815 regdom_intersect(const struct ieee80211_regdomain
*rd1
,
816 const struct ieee80211_regdomain
*rd2
)
820 unsigned int num_rules
= 0, rule_idx
= 0;
821 const struct ieee80211_reg_rule
*rule1
, *rule2
;
822 struct ieee80211_reg_rule
*intersected_rule
;
823 struct ieee80211_regdomain
*rd
;
824 /* This is just a dummy holder to help us count */
825 struct ieee80211_reg_rule dummy_rule
;
831 * First we get a count of the rules we'll need, then we actually
832 * build them. This is to so we can malloc() and free() a
833 * regdomain once. The reason we use reg_rules_intersect() here
834 * is it will return -EINVAL if the rule computed makes no sense.
835 * All rules that do check out OK are valid.
838 for (x
= 0; x
< rd1
->n_reg_rules
; x
++) {
839 rule1
= &rd1
->reg_rules
[x
];
840 for (y
= 0; y
< rd2
->n_reg_rules
; y
++) {
841 rule2
= &rd2
->reg_rules
[y
];
842 if (!reg_rules_intersect(rd1
, rd2
, rule1
, rule2
,
851 size_of_regd
= sizeof(struct ieee80211_regdomain
) +
852 num_rules
* sizeof(struct ieee80211_reg_rule
);
854 rd
= kzalloc(size_of_regd
, GFP_KERNEL
);
858 for (x
= 0; x
< rd1
->n_reg_rules
&& rule_idx
< num_rules
; x
++) {
859 rule1
= &rd1
->reg_rules
[x
];
860 for (y
= 0; y
< rd2
->n_reg_rules
&& rule_idx
< num_rules
; y
++) {
861 rule2
= &rd2
->reg_rules
[y
];
863 * This time around instead of using the stack lets
864 * write to the target rule directly saving ourselves
867 intersected_rule
= &rd
->reg_rules
[rule_idx
];
868 r
= reg_rules_intersect(rd1
, rd2
, rule1
, rule2
,
871 * No need to memset here the intersected rule here as
872 * we're not using the stack anymore
880 if (rule_idx
!= num_rules
) {
885 rd
->n_reg_rules
= num_rules
;
888 rd
->dfs_region
= reg_intersect_dfs_region(rd1
->dfs_region
,
895 * XXX: add support for the rest of enum nl80211_reg_rule_flags, we may
896 * want to just have the channel structure use these
898 static u32
map_regdom_flags(u32 rd_flags
)
900 u32 channel_flags
= 0;
901 if (rd_flags
& NL80211_RRF_NO_IR_ALL
)
902 channel_flags
|= IEEE80211_CHAN_NO_IR
;
903 if (rd_flags
& NL80211_RRF_DFS
)
904 channel_flags
|= IEEE80211_CHAN_RADAR
;
905 if (rd_flags
& NL80211_RRF_NO_OFDM
)
906 channel_flags
|= IEEE80211_CHAN_NO_OFDM
;
907 if (rd_flags
& NL80211_RRF_NO_OUTDOOR
)
908 channel_flags
|= IEEE80211_CHAN_INDOOR_ONLY
;
909 return channel_flags
;
912 static const struct ieee80211_reg_rule
*
913 freq_reg_info_regd(struct wiphy
*wiphy
, u32 center_freq
,
914 const struct ieee80211_regdomain
*regd
)
917 bool band_rule_found
= false;
918 bool bw_fits
= false;
921 return ERR_PTR(-EINVAL
);
923 for (i
= 0; i
< regd
->n_reg_rules
; i
++) {
924 const struct ieee80211_reg_rule
*rr
;
925 const struct ieee80211_freq_range
*fr
= NULL
;
927 rr
= ®d
->reg_rules
[i
];
928 fr
= &rr
->freq_range
;
931 * We only need to know if one frequency rule was
932 * was in center_freq's band, that's enough, so lets
933 * not overwrite it once found
935 if (!band_rule_found
)
936 band_rule_found
= freq_in_rule_band(fr
, center_freq
);
938 bw_fits
= reg_does_bw_fit(fr
, center_freq
, MHZ_TO_KHZ(5));
940 if (band_rule_found
&& bw_fits
)
944 if (!band_rule_found
)
945 return ERR_PTR(-ERANGE
);
947 return ERR_PTR(-EINVAL
);
950 const struct ieee80211_reg_rule
*freq_reg_info(struct wiphy
*wiphy
,
953 const struct ieee80211_regdomain
*regd
;
955 regd
= reg_get_regdomain(wiphy
);
957 return freq_reg_info_regd(wiphy
, center_freq
, regd
);
959 EXPORT_SYMBOL(freq_reg_info
);
961 const char *reg_initiator_name(enum nl80211_reg_initiator initiator
)
964 case NL80211_REGDOM_SET_BY_CORE
:
966 case NL80211_REGDOM_SET_BY_USER
:
968 case NL80211_REGDOM_SET_BY_DRIVER
:
970 case NL80211_REGDOM_SET_BY_COUNTRY_IE
:
977 EXPORT_SYMBOL(reg_initiator_name
);
979 #ifdef CONFIG_CFG80211_REG_DEBUG
980 static void chan_reg_rule_print_dbg(const struct ieee80211_regdomain
*regd
,
981 struct ieee80211_channel
*chan
,
982 const struct ieee80211_reg_rule
*reg_rule
)
984 const struct ieee80211_power_rule
*power_rule
;
985 const struct ieee80211_freq_range
*freq_range
;
986 char max_antenna_gain
[32], bw
[32];
988 power_rule
= ®_rule
->power_rule
;
989 freq_range
= ®_rule
->freq_range
;
991 if (!power_rule
->max_antenna_gain
)
992 snprintf(max_antenna_gain
, sizeof(max_antenna_gain
), "N/A");
994 snprintf(max_antenna_gain
, sizeof(max_antenna_gain
), "%d",
995 power_rule
->max_antenna_gain
);
997 if (reg_rule
->flags
& NL80211_RRF_AUTO_BW
)
998 snprintf(bw
, sizeof(bw
), "%d KHz, %d KHz AUTO",
999 freq_range
->max_bandwidth_khz
,
1000 reg_get_max_bandwidth(regd
, reg_rule
));
1002 snprintf(bw
, sizeof(bw
), "%d KHz",
1003 freq_range
->max_bandwidth_khz
);
1005 REG_DBG_PRINT("Updating information on frequency %d MHz with regulatory rule:\n",
1008 REG_DBG_PRINT("%d KHz - %d KHz @ %s), (%s mBi, %d mBm)\n",
1009 freq_range
->start_freq_khz
, freq_range
->end_freq_khz
,
1010 bw
, max_antenna_gain
,
1011 power_rule
->max_eirp
);
1014 static void chan_reg_rule_print_dbg(const struct ieee80211_regdomain
*regd
,
1015 struct ieee80211_channel
*chan
,
1016 const struct ieee80211_reg_rule
*reg_rule
)
1022 /* Find an ieee80211_reg_rule such that a 5MHz channel with frequency
1023 * chan->center_freq fits there.
1024 * If there is no such reg_rule, disable the channel, otherwise set the
1025 * flags corresponding to the bandwidths allowed in the particular reg_rule
1027 static void handle_channel(struct wiphy
*wiphy
,
1028 enum nl80211_reg_initiator initiator
,
1029 struct ieee80211_channel
*chan
)
1031 u32 flags
, bw_flags
= 0;
1032 const struct ieee80211_reg_rule
*reg_rule
= NULL
;
1033 const struct ieee80211_power_rule
*power_rule
= NULL
;
1034 const struct ieee80211_freq_range
*freq_range
= NULL
;
1035 struct wiphy
*request_wiphy
= NULL
;
1036 struct regulatory_request
*lr
= get_last_request();
1037 const struct ieee80211_regdomain
*regd
;
1038 u32 max_bandwidth_khz
;
1040 request_wiphy
= wiphy_idx_to_wiphy(lr
->wiphy_idx
);
1042 flags
= chan
->orig_flags
;
1044 reg_rule
= freq_reg_info(wiphy
, MHZ_TO_KHZ(chan
->center_freq
));
1045 if (IS_ERR(reg_rule
)) {
1047 * We will disable all channels that do not match our
1048 * received regulatory rule unless the hint is coming
1049 * from a Country IE and the Country IE had no information
1050 * about a band. The IEEE 802.11 spec allows for an AP
1051 * to send only a subset of the regulatory rules allowed,
1052 * so an AP in the US that only supports 2.4 GHz may only send
1053 * a country IE with information for the 2.4 GHz band
1054 * while 5 GHz is still supported.
1056 if (initiator
== NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
1057 PTR_ERR(reg_rule
) == -ERANGE
)
1060 if (lr
->initiator
== NL80211_REGDOM_SET_BY_DRIVER
&&
1061 request_wiphy
&& request_wiphy
== wiphy
&&
1062 request_wiphy
->regulatory_flags
& REGULATORY_STRICT_REG
) {
1063 REG_DBG_PRINT("Disabling freq %d MHz for good\n",
1065 chan
->orig_flags
|= IEEE80211_CHAN_DISABLED
;
1066 chan
->flags
= chan
->orig_flags
;
1068 REG_DBG_PRINT("Disabling freq %d MHz\n",
1070 chan
->flags
|= IEEE80211_CHAN_DISABLED
;
1075 regd
= reg_get_regdomain(wiphy
);
1076 chan_reg_rule_print_dbg(regd
, chan
, reg_rule
);
1078 power_rule
= ®_rule
->power_rule
;
1079 freq_range
= ®_rule
->freq_range
;
1081 max_bandwidth_khz
= freq_range
->max_bandwidth_khz
;
1082 /* Check if auto calculation requested */
1083 if (reg_rule
->flags
& NL80211_RRF_AUTO_BW
)
1084 max_bandwidth_khz
= reg_get_max_bandwidth(regd
, reg_rule
);
1086 if (max_bandwidth_khz
< MHZ_TO_KHZ(10))
1087 bw_flags
= IEEE80211_CHAN_NO_10MHZ
;
1088 if (max_bandwidth_khz
< MHZ_TO_KHZ(20))
1089 bw_flags
|= IEEE80211_CHAN_NO_20MHZ
;
1090 if (max_bandwidth_khz
< MHZ_TO_KHZ(40))
1091 bw_flags
|= IEEE80211_CHAN_NO_HT40
;
1092 if (max_bandwidth_khz
< MHZ_TO_KHZ(80))
1093 bw_flags
|= IEEE80211_CHAN_NO_80MHZ
;
1094 if (max_bandwidth_khz
< MHZ_TO_KHZ(160))
1095 bw_flags
|= IEEE80211_CHAN_NO_160MHZ
;
1097 if (lr
->initiator
== NL80211_REGDOM_SET_BY_DRIVER
&&
1098 request_wiphy
&& request_wiphy
== wiphy
&&
1099 request_wiphy
->regulatory_flags
& REGULATORY_STRICT_REG
) {
1101 * This guarantees the driver's requested regulatory domain
1102 * will always be used as a base for further regulatory
1105 chan
->flags
= chan
->orig_flags
=
1106 map_regdom_flags(reg_rule
->flags
) | bw_flags
;
1107 chan
->max_antenna_gain
= chan
->orig_mag
=
1108 (int) MBI_TO_DBI(power_rule
->max_antenna_gain
);
1109 chan
->max_reg_power
= chan
->max_power
= chan
->orig_mpwr
=
1110 (int) MBM_TO_DBM(power_rule
->max_eirp
);
1112 if (chan
->flags
& IEEE80211_CHAN_RADAR
) {
1113 chan
->dfs_cac_ms
= IEEE80211_DFS_MIN_CAC_TIME_MS
;
1114 if (reg_rule
->dfs_cac_ms
)
1115 chan
->dfs_cac_ms
= reg_rule
->dfs_cac_ms
;
1121 chan
->dfs_state
= NL80211_DFS_USABLE
;
1122 chan
->dfs_state_entered
= jiffies
;
1124 chan
->beacon_found
= false;
1125 chan
->flags
= flags
| bw_flags
| map_regdom_flags(reg_rule
->flags
);
1126 chan
->max_antenna_gain
=
1127 min_t(int, chan
->orig_mag
,
1128 MBI_TO_DBI(power_rule
->max_antenna_gain
));
1129 chan
->max_reg_power
= (int) MBM_TO_DBM(power_rule
->max_eirp
);
1131 if (chan
->flags
& IEEE80211_CHAN_RADAR
) {
1132 if (reg_rule
->dfs_cac_ms
)
1133 chan
->dfs_cac_ms
= reg_rule
->dfs_cac_ms
;
1135 chan
->dfs_cac_ms
= IEEE80211_DFS_MIN_CAC_TIME_MS
;
1138 if (chan
->orig_mpwr
) {
1140 * Devices that use REGULATORY_COUNTRY_IE_FOLLOW_POWER
1141 * will always follow the passed country IE power settings.
1143 if (initiator
== NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
1144 wiphy
->regulatory_flags
& REGULATORY_COUNTRY_IE_FOLLOW_POWER
)
1145 chan
->max_power
= chan
->max_reg_power
;
1147 chan
->max_power
= min(chan
->orig_mpwr
,
1148 chan
->max_reg_power
);
1150 chan
->max_power
= chan
->max_reg_power
;
1153 static void handle_band(struct wiphy
*wiphy
,
1154 enum nl80211_reg_initiator initiator
,
1155 struct ieee80211_supported_band
*sband
)
1162 for (i
= 0; i
< sband
->n_channels
; i
++)
1163 handle_channel(wiphy
, initiator
, &sband
->channels
[i
]);
1166 static bool reg_request_cell_base(struct regulatory_request
*request
)
1168 if (request
->initiator
!= NL80211_REGDOM_SET_BY_USER
)
1170 return request
->user_reg_hint_type
== NL80211_USER_REG_HINT_CELL_BASE
;
1173 static bool reg_request_indoor(struct regulatory_request
*request
)
1175 if (request
->initiator
!= NL80211_REGDOM_SET_BY_USER
)
1177 return request
->user_reg_hint_type
== NL80211_USER_REG_HINT_INDOOR
;
1180 bool reg_last_request_cell_base(void)
1182 return reg_request_cell_base(get_last_request());
1185 #ifdef CONFIG_CFG80211_REG_CELLULAR_HINTS
1186 /* Core specific check */
1187 static enum reg_request_treatment
1188 reg_ignore_cell_hint(struct regulatory_request
*pending_request
)
1190 struct regulatory_request
*lr
= get_last_request();
1192 if (!reg_num_devs_support_basehint
)
1193 return REG_REQ_IGNORE
;
1195 if (reg_request_cell_base(lr
) &&
1196 !regdom_changes(pending_request
->alpha2
))
1197 return REG_REQ_ALREADY_SET
;
1202 /* Device specific check */
1203 static bool reg_dev_ignore_cell_hint(struct wiphy
*wiphy
)
1205 return !(wiphy
->features
& NL80211_FEATURE_CELL_BASE_REG_HINTS
);
1208 static int reg_ignore_cell_hint(struct regulatory_request
*pending_request
)
1210 return REG_REQ_IGNORE
;
1213 static bool reg_dev_ignore_cell_hint(struct wiphy
*wiphy
)
1219 static bool wiphy_strict_alpha2_regd(struct wiphy
*wiphy
)
1221 if (wiphy
->regulatory_flags
& REGULATORY_STRICT_REG
&&
1222 !(wiphy
->regulatory_flags
& REGULATORY_CUSTOM_REG
))
1227 static bool ignore_reg_update(struct wiphy
*wiphy
,
1228 enum nl80211_reg_initiator initiator
)
1230 struct regulatory_request
*lr
= get_last_request();
1233 REG_DBG_PRINT("Ignoring regulatory request set by %s "
1234 "since last_request is not set\n",
1235 reg_initiator_name(initiator
));
1239 if (initiator
== NL80211_REGDOM_SET_BY_CORE
&&
1240 wiphy
->regulatory_flags
& REGULATORY_CUSTOM_REG
) {
1241 REG_DBG_PRINT("Ignoring regulatory request set by %s "
1242 "since the driver uses its own custom "
1243 "regulatory domain\n",
1244 reg_initiator_name(initiator
));
1249 * wiphy->regd will be set once the device has its own
1250 * desired regulatory domain set
1252 if (wiphy_strict_alpha2_regd(wiphy
) && !wiphy
->regd
&&
1253 initiator
!= NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
1254 !is_world_regdom(lr
->alpha2
)) {
1255 REG_DBG_PRINT("Ignoring regulatory request set by %s "
1256 "since the driver requires its own regulatory "
1257 "domain to be set first\n",
1258 reg_initiator_name(initiator
));
1262 if (reg_request_cell_base(lr
))
1263 return reg_dev_ignore_cell_hint(wiphy
);
1268 static bool reg_is_world_roaming(struct wiphy
*wiphy
)
1270 const struct ieee80211_regdomain
*cr
= get_cfg80211_regdom();
1271 const struct ieee80211_regdomain
*wr
= get_wiphy_regdom(wiphy
);
1272 struct regulatory_request
*lr
= get_last_request();
1274 if (is_world_regdom(cr
->alpha2
) || (wr
&& is_world_regdom(wr
->alpha2
)))
1277 if (lr
&& lr
->initiator
!= NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
1278 wiphy
->regulatory_flags
& REGULATORY_CUSTOM_REG
)
1284 static void handle_reg_beacon(struct wiphy
*wiphy
, unsigned int chan_idx
,
1285 struct reg_beacon
*reg_beacon
)
1287 struct ieee80211_supported_band
*sband
;
1288 struct ieee80211_channel
*chan
;
1289 bool channel_changed
= false;
1290 struct ieee80211_channel chan_before
;
1292 sband
= wiphy
->bands
[reg_beacon
->chan
.band
];
1293 chan
= &sband
->channels
[chan_idx
];
1295 if (likely(chan
->center_freq
!= reg_beacon
->chan
.center_freq
))
1298 if (chan
->beacon_found
)
1301 chan
->beacon_found
= true;
1303 if (!reg_is_world_roaming(wiphy
))
1306 if (wiphy
->regulatory_flags
& REGULATORY_DISABLE_BEACON_HINTS
)
1309 chan_before
.center_freq
= chan
->center_freq
;
1310 chan_before
.flags
= chan
->flags
;
1312 if (chan
->flags
& IEEE80211_CHAN_NO_IR
) {
1313 chan
->flags
&= ~IEEE80211_CHAN_NO_IR
;
1314 channel_changed
= true;
1317 if (channel_changed
)
1318 nl80211_send_beacon_hint_event(wiphy
, &chan_before
, chan
);
1322 * Called when a scan on a wiphy finds a beacon on
1325 static void wiphy_update_new_beacon(struct wiphy
*wiphy
,
1326 struct reg_beacon
*reg_beacon
)
1329 struct ieee80211_supported_band
*sband
;
1331 if (!wiphy
->bands
[reg_beacon
->chan
.band
])
1334 sband
= wiphy
->bands
[reg_beacon
->chan
.band
];
1336 for (i
= 0; i
< sband
->n_channels
; i
++)
1337 handle_reg_beacon(wiphy
, i
, reg_beacon
);
1341 * Called upon reg changes or a new wiphy is added
1343 static void wiphy_update_beacon_reg(struct wiphy
*wiphy
)
1346 struct ieee80211_supported_band
*sband
;
1347 struct reg_beacon
*reg_beacon
;
1349 list_for_each_entry(reg_beacon
, ®_beacon_list
, list
) {
1350 if (!wiphy
->bands
[reg_beacon
->chan
.band
])
1352 sband
= wiphy
->bands
[reg_beacon
->chan
.band
];
1353 for (i
= 0; i
< sband
->n_channels
; i
++)
1354 handle_reg_beacon(wiphy
, i
, reg_beacon
);
1358 /* Reap the advantages of previously found beacons */
1359 static void reg_process_beacons(struct wiphy
*wiphy
)
1362 * Means we are just firing up cfg80211, so no beacons would
1363 * have been processed yet.
1367 wiphy_update_beacon_reg(wiphy
);
1370 static bool is_ht40_allowed(struct ieee80211_channel
*chan
)
1374 if (chan
->flags
& IEEE80211_CHAN_DISABLED
)
1376 /* This would happen when regulatory rules disallow HT40 completely */
1377 if ((chan
->flags
& IEEE80211_CHAN_NO_HT40
) == IEEE80211_CHAN_NO_HT40
)
1382 static void reg_process_ht_flags_channel(struct wiphy
*wiphy
,
1383 struct ieee80211_channel
*channel
)
1385 struct ieee80211_supported_band
*sband
= wiphy
->bands
[channel
->band
];
1386 struct ieee80211_channel
*channel_before
= NULL
, *channel_after
= NULL
;
1389 if (!is_ht40_allowed(channel
)) {
1390 channel
->flags
|= IEEE80211_CHAN_NO_HT40
;
1395 * We need to ensure the extension channels exist to
1396 * be able to use HT40- or HT40+, this finds them (or not)
1398 for (i
= 0; i
< sband
->n_channels
; i
++) {
1399 struct ieee80211_channel
*c
= &sband
->channels
[i
];
1401 if (c
->center_freq
== (channel
->center_freq
- 20))
1403 if (c
->center_freq
== (channel
->center_freq
+ 20))
1408 * Please note that this assumes target bandwidth is 20 MHz,
1409 * if that ever changes we also need to change the below logic
1410 * to include that as well.
1412 if (!is_ht40_allowed(channel_before
))
1413 channel
->flags
|= IEEE80211_CHAN_NO_HT40MINUS
;
1415 channel
->flags
&= ~IEEE80211_CHAN_NO_HT40MINUS
;
1417 if (!is_ht40_allowed(channel_after
))
1418 channel
->flags
|= IEEE80211_CHAN_NO_HT40PLUS
;
1420 channel
->flags
&= ~IEEE80211_CHAN_NO_HT40PLUS
;
1423 static void reg_process_ht_flags_band(struct wiphy
*wiphy
,
1424 struct ieee80211_supported_band
*sband
)
1431 for (i
= 0; i
< sband
->n_channels
; i
++)
1432 reg_process_ht_flags_channel(wiphy
, &sband
->channels
[i
]);
1435 static void reg_process_ht_flags(struct wiphy
*wiphy
)
1437 enum ieee80211_band band
;
1442 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++)
1443 reg_process_ht_flags_band(wiphy
, wiphy
->bands
[band
]);
1446 static void reg_call_notifier(struct wiphy
*wiphy
,
1447 struct regulatory_request
*request
)
1449 if (wiphy
->reg_notifier
)
1450 wiphy
->reg_notifier(wiphy
, request
);
1453 static void wiphy_update_regulatory(struct wiphy
*wiphy
,
1454 enum nl80211_reg_initiator initiator
)
1456 enum ieee80211_band band
;
1457 struct regulatory_request
*lr
= get_last_request();
1459 if (ignore_reg_update(wiphy
, initiator
)) {
1461 * Regulatory updates set by CORE are ignored for custom
1462 * regulatory cards. Let us notify the changes to the driver,
1463 * as some drivers used this to restore its orig_* reg domain.
1465 if (initiator
== NL80211_REGDOM_SET_BY_CORE
&&
1466 wiphy
->regulatory_flags
& REGULATORY_CUSTOM_REG
)
1467 reg_call_notifier(wiphy
, lr
);
1471 lr
->dfs_region
= get_cfg80211_regdom()->dfs_region
;
1473 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++)
1474 handle_band(wiphy
, initiator
, wiphy
->bands
[band
]);
1476 reg_process_beacons(wiphy
);
1477 reg_process_ht_flags(wiphy
);
1478 reg_call_notifier(wiphy
, lr
);
1481 static void update_all_wiphy_regulatory(enum nl80211_reg_initiator initiator
)
1483 struct cfg80211_registered_device
*rdev
;
1484 struct wiphy
*wiphy
;
1488 list_for_each_entry(rdev
, &cfg80211_rdev_list
, list
) {
1489 wiphy
= &rdev
->wiphy
;
1490 wiphy_update_regulatory(wiphy
, initiator
);
1494 static void handle_channel_custom(struct wiphy
*wiphy
,
1495 struct ieee80211_channel
*chan
,
1496 const struct ieee80211_regdomain
*regd
)
1499 const struct ieee80211_reg_rule
*reg_rule
= NULL
;
1500 const struct ieee80211_power_rule
*power_rule
= NULL
;
1501 const struct ieee80211_freq_range
*freq_range
= NULL
;
1502 u32 max_bandwidth_khz
;
1504 reg_rule
= freq_reg_info_regd(wiphy
, MHZ_TO_KHZ(chan
->center_freq
),
1507 if (IS_ERR(reg_rule
)) {
1508 REG_DBG_PRINT("Disabling freq %d MHz as custom regd has no rule that fits it\n",
1510 chan
->orig_flags
|= IEEE80211_CHAN_DISABLED
;
1511 chan
->flags
= chan
->orig_flags
;
1515 chan_reg_rule_print_dbg(regd
, chan
, reg_rule
);
1517 power_rule
= ®_rule
->power_rule
;
1518 freq_range
= ®_rule
->freq_range
;
1520 max_bandwidth_khz
= freq_range
->max_bandwidth_khz
;
1521 /* Check if auto calculation requested */
1522 if (reg_rule
->flags
& NL80211_RRF_AUTO_BW
)
1523 max_bandwidth_khz
= reg_get_max_bandwidth(regd
, reg_rule
);
1525 if (max_bandwidth_khz
< MHZ_TO_KHZ(10))
1526 bw_flags
= IEEE80211_CHAN_NO_10MHZ
;
1527 if (max_bandwidth_khz
< MHZ_TO_KHZ(20))
1528 bw_flags
|= IEEE80211_CHAN_NO_20MHZ
;
1529 if (max_bandwidth_khz
< MHZ_TO_KHZ(40))
1530 bw_flags
|= IEEE80211_CHAN_NO_HT40
;
1531 if (max_bandwidth_khz
< MHZ_TO_KHZ(80))
1532 bw_flags
|= IEEE80211_CHAN_NO_80MHZ
;
1533 if (max_bandwidth_khz
< MHZ_TO_KHZ(160))
1534 bw_flags
|= IEEE80211_CHAN_NO_160MHZ
;
1536 chan
->flags
|= map_regdom_flags(reg_rule
->flags
) | bw_flags
;
1537 chan
->max_antenna_gain
= (int) MBI_TO_DBI(power_rule
->max_antenna_gain
);
1538 chan
->max_reg_power
= chan
->max_power
=
1539 (int) MBM_TO_DBM(power_rule
->max_eirp
);
1542 static void handle_band_custom(struct wiphy
*wiphy
,
1543 struct ieee80211_supported_band
*sband
,
1544 const struct ieee80211_regdomain
*regd
)
1551 for (i
= 0; i
< sband
->n_channels
; i
++)
1552 handle_channel_custom(wiphy
, &sband
->channels
[i
], regd
);
1555 /* Used by drivers prior to wiphy registration */
1556 void wiphy_apply_custom_regulatory(struct wiphy
*wiphy
,
1557 const struct ieee80211_regdomain
*regd
)
1559 enum ieee80211_band band
;
1560 unsigned int bands_set
= 0;
1562 WARN(!(wiphy
->regulatory_flags
& REGULATORY_CUSTOM_REG
),
1563 "wiphy should have REGULATORY_CUSTOM_REG\n");
1564 wiphy
->regulatory_flags
|= REGULATORY_CUSTOM_REG
;
1566 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++) {
1567 if (!wiphy
->bands
[band
])
1569 handle_band_custom(wiphy
, wiphy
->bands
[band
], regd
);
1574 * no point in calling this if it won't have any effect
1575 * on your device's supported bands.
1577 WARN_ON(!bands_set
);
1579 EXPORT_SYMBOL(wiphy_apply_custom_regulatory
);
1581 static void reg_set_request_processed(void)
1583 bool need_more_processing
= false;
1584 struct regulatory_request
*lr
= get_last_request();
1586 lr
->processed
= true;
1588 spin_lock(®_requests_lock
);
1589 if (!list_empty(®_requests_list
))
1590 need_more_processing
= true;
1591 spin_unlock(®_requests_lock
);
1593 if (lr
->initiator
== NL80211_REGDOM_SET_BY_USER
)
1594 cancel_delayed_work(®_timeout
);
1596 if (need_more_processing
)
1597 schedule_work(®_work
);
1601 * reg_process_hint_core - process core regulatory requests
1602 * @pending_request: a pending core regulatory request
1604 * The wireless subsystem can use this function to process
1605 * a regulatory request issued by the regulatory core.
1607 * Returns one of the different reg request treatment values.
1609 static enum reg_request_treatment
1610 reg_process_hint_core(struct regulatory_request
*core_request
)
1613 core_request
->intersect
= false;
1614 core_request
->processed
= false;
1616 reg_update_last_request(core_request
);
1618 return reg_call_crda(core_request
);
1621 static enum reg_request_treatment
1622 __reg_process_hint_user(struct regulatory_request
*user_request
)
1624 struct regulatory_request
*lr
= get_last_request();
1626 if (reg_request_indoor(user_request
)) {
1627 reg_is_indoor
= true;
1628 return REG_REQ_USER_HINT_HANDLED
;
1631 if (reg_request_cell_base(user_request
))
1632 return reg_ignore_cell_hint(user_request
);
1634 if (reg_request_cell_base(lr
))
1635 return REG_REQ_IGNORE
;
1637 if (lr
->initiator
== NL80211_REGDOM_SET_BY_COUNTRY_IE
)
1638 return REG_REQ_INTERSECT
;
1640 * If the user knows better the user should set the regdom
1641 * to their country before the IE is picked up
1643 if (lr
->initiator
== NL80211_REGDOM_SET_BY_USER
&&
1645 return REG_REQ_IGNORE
;
1647 * Process user requests only after previous user/driver/core
1648 * requests have been processed
1650 if ((lr
->initiator
== NL80211_REGDOM_SET_BY_CORE
||
1651 lr
->initiator
== NL80211_REGDOM_SET_BY_DRIVER
||
1652 lr
->initiator
== NL80211_REGDOM_SET_BY_USER
) &&
1653 regdom_changes(lr
->alpha2
))
1654 return REG_REQ_IGNORE
;
1656 if (!regdom_changes(user_request
->alpha2
))
1657 return REG_REQ_ALREADY_SET
;
1663 * reg_process_hint_user - process user regulatory requests
1664 * @user_request: a pending user regulatory request
1666 * The wireless subsystem can use this function to process
1667 * a regulatory request initiated by userspace.
1669 * Returns one of the different reg request treatment values.
1671 static enum reg_request_treatment
1672 reg_process_hint_user(struct regulatory_request
*user_request
)
1674 enum reg_request_treatment treatment
;
1676 treatment
= __reg_process_hint_user(user_request
);
1677 if (treatment
== REG_REQ_IGNORE
||
1678 treatment
== REG_REQ_ALREADY_SET
||
1679 treatment
== REG_REQ_USER_HINT_HANDLED
) {
1680 reg_free_request(user_request
);
1684 user_request
->intersect
= treatment
== REG_REQ_INTERSECT
;
1685 user_request
->processed
= false;
1687 reg_update_last_request(user_request
);
1689 user_alpha2
[0] = user_request
->alpha2
[0];
1690 user_alpha2
[1] = user_request
->alpha2
[1];
1692 return reg_call_crda(user_request
);
1695 static enum reg_request_treatment
1696 __reg_process_hint_driver(struct regulatory_request
*driver_request
)
1698 struct regulatory_request
*lr
= get_last_request();
1700 if (lr
->initiator
== NL80211_REGDOM_SET_BY_CORE
) {
1701 if (regdom_changes(driver_request
->alpha2
))
1703 return REG_REQ_ALREADY_SET
;
1707 * This would happen if you unplug and plug your card
1708 * back in or if you add a new device for which the previously
1709 * loaded card also agrees on the regulatory domain.
1711 if (lr
->initiator
== NL80211_REGDOM_SET_BY_DRIVER
&&
1712 !regdom_changes(driver_request
->alpha2
))
1713 return REG_REQ_ALREADY_SET
;
1715 return REG_REQ_INTERSECT
;
1719 * reg_process_hint_driver - process driver regulatory requests
1720 * @driver_request: a pending driver regulatory request
1722 * The wireless subsystem can use this function to process
1723 * a regulatory request issued by an 802.11 driver.
1725 * Returns one of the different reg request treatment values.
1727 static enum reg_request_treatment
1728 reg_process_hint_driver(struct wiphy
*wiphy
,
1729 struct regulatory_request
*driver_request
)
1731 const struct ieee80211_regdomain
*regd
;
1732 enum reg_request_treatment treatment
;
1734 treatment
= __reg_process_hint_driver(driver_request
);
1736 switch (treatment
) {
1739 case REG_REQ_IGNORE
:
1740 case REG_REQ_USER_HINT_HANDLED
:
1741 reg_free_request(driver_request
);
1743 case REG_REQ_INTERSECT
:
1745 case REG_REQ_ALREADY_SET
:
1746 regd
= reg_copy_regd(get_cfg80211_regdom());
1748 reg_free_request(driver_request
);
1749 return REG_REQ_IGNORE
;
1751 rcu_assign_pointer(wiphy
->regd
, regd
);
1755 driver_request
->intersect
= treatment
== REG_REQ_INTERSECT
;
1756 driver_request
->processed
= false;
1758 reg_update_last_request(driver_request
);
1761 * Since CRDA will not be called in this case as we already
1762 * have applied the requested regulatory domain before we just
1763 * inform userspace we have processed the request
1765 if (treatment
== REG_REQ_ALREADY_SET
) {
1766 nl80211_send_reg_change_event(driver_request
);
1767 reg_set_request_processed();
1771 return reg_call_crda(driver_request
);
1774 static enum reg_request_treatment
1775 __reg_process_hint_country_ie(struct wiphy
*wiphy
,
1776 struct regulatory_request
*country_ie_request
)
1778 struct wiphy
*last_wiphy
= NULL
;
1779 struct regulatory_request
*lr
= get_last_request();
1781 if (reg_request_cell_base(lr
)) {
1782 /* Trust a Cell base station over the AP's country IE */
1783 if (regdom_changes(country_ie_request
->alpha2
))
1784 return REG_REQ_IGNORE
;
1785 return REG_REQ_ALREADY_SET
;
1787 if (wiphy
->regulatory_flags
& REGULATORY_COUNTRY_IE_IGNORE
)
1788 return REG_REQ_IGNORE
;
1791 if (unlikely(!is_an_alpha2(country_ie_request
->alpha2
)))
1794 if (lr
->initiator
!= NL80211_REGDOM_SET_BY_COUNTRY_IE
)
1797 last_wiphy
= wiphy_idx_to_wiphy(lr
->wiphy_idx
);
1799 if (last_wiphy
!= wiphy
) {
1801 * Two cards with two APs claiming different
1802 * Country IE alpha2s. We could
1803 * intersect them, but that seems unlikely
1804 * to be correct. Reject second one for now.
1806 if (regdom_changes(country_ie_request
->alpha2
))
1807 return REG_REQ_IGNORE
;
1808 return REG_REQ_ALREADY_SET
;
1811 * Two consecutive Country IE hints on the same wiphy.
1812 * This should be picked up early by the driver/stack
1814 if (WARN_ON(regdom_changes(country_ie_request
->alpha2
)))
1816 return REG_REQ_ALREADY_SET
;
1820 * reg_process_hint_country_ie - process regulatory requests from country IEs
1821 * @country_ie_request: a regulatory request from a country IE
1823 * The wireless subsystem can use this function to process
1824 * a regulatory request issued by a country Information Element.
1826 * Returns one of the different reg request treatment values.
1828 static enum reg_request_treatment
1829 reg_process_hint_country_ie(struct wiphy
*wiphy
,
1830 struct regulatory_request
*country_ie_request
)
1832 enum reg_request_treatment treatment
;
1834 treatment
= __reg_process_hint_country_ie(wiphy
, country_ie_request
);
1836 switch (treatment
) {
1839 case REG_REQ_IGNORE
:
1840 case REG_REQ_USER_HINT_HANDLED
:
1842 case REG_REQ_ALREADY_SET
:
1843 reg_free_request(country_ie_request
);
1845 case REG_REQ_INTERSECT
:
1846 reg_free_request(country_ie_request
);
1848 * This doesn't happen yet, not sure we
1849 * ever want to support it for this case.
1851 WARN_ONCE(1, "Unexpected intersection for country IEs");
1852 return REG_REQ_IGNORE
;
1855 country_ie_request
->intersect
= false;
1856 country_ie_request
->processed
= false;
1858 reg_update_last_request(country_ie_request
);
1860 return reg_call_crda(country_ie_request
);
1863 /* This processes *all* regulatory hints */
1864 static void reg_process_hint(struct regulatory_request
*reg_request
)
1866 struct wiphy
*wiphy
= NULL
;
1867 enum reg_request_treatment treatment
;
1869 if (reg_request
->wiphy_idx
!= WIPHY_IDX_INVALID
)
1870 wiphy
= wiphy_idx_to_wiphy(reg_request
->wiphy_idx
);
1872 switch (reg_request
->initiator
) {
1873 case NL80211_REGDOM_SET_BY_CORE
:
1874 reg_process_hint_core(reg_request
);
1876 case NL80211_REGDOM_SET_BY_USER
:
1877 treatment
= reg_process_hint_user(reg_request
);
1878 if (treatment
== REG_REQ_IGNORE
||
1879 treatment
== REG_REQ_ALREADY_SET
||
1880 treatment
== REG_REQ_USER_HINT_HANDLED
)
1882 queue_delayed_work(system_power_efficient_wq
,
1883 ®_timeout
, msecs_to_jiffies(3142));
1885 case NL80211_REGDOM_SET_BY_DRIVER
:
1888 treatment
= reg_process_hint_driver(wiphy
, reg_request
);
1890 case NL80211_REGDOM_SET_BY_COUNTRY_IE
:
1893 treatment
= reg_process_hint_country_ie(wiphy
, reg_request
);
1896 WARN(1, "invalid initiator %d\n", reg_request
->initiator
);
1900 /* This is required so that the orig_* parameters are saved */
1901 if (treatment
== REG_REQ_ALREADY_SET
&& wiphy
&&
1902 wiphy
->regulatory_flags
& REGULATORY_STRICT_REG
)
1903 wiphy_update_regulatory(wiphy
, reg_request
->initiator
);
1908 reg_free_request(reg_request
);
1912 * Processes regulatory hints, this is all the NL80211_REGDOM_SET_BY_*
1913 * Regulatory hints come on a first come first serve basis and we
1914 * must process each one atomically.
1916 static void reg_process_pending_hints(void)
1918 struct regulatory_request
*reg_request
, *lr
;
1920 lr
= get_last_request();
1922 /* When last_request->processed becomes true this will be rescheduled */
1923 if (lr
&& !lr
->processed
) {
1924 reg_process_hint(lr
);
1928 spin_lock(®_requests_lock
);
1930 if (list_empty(®_requests_list
)) {
1931 spin_unlock(®_requests_lock
);
1935 reg_request
= list_first_entry(®_requests_list
,
1936 struct regulatory_request
,
1938 list_del_init(®_request
->list
);
1940 spin_unlock(®_requests_lock
);
1942 reg_process_hint(reg_request
);
1945 /* Processes beacon hints -- this has nothing to do with country IEs */
1946 static void reg_process_pending_beacon_hints(void)
1948 struct cfg80211_registered_device
*rdev
;
1949 struct reg_beacon
*pending_beacon
, *tmp
;
1951 /* This goes through the _pending_ beacon list */
1952 spin_lock_bh(®_pending_beacons_lock
);
1954 list_for_each_entry_safe(pending_beacon
, tmp
,
1955 ®_pending_beacons
, list
) {
1956 list_del_init(&pending_beacon
->list
);
1958 /* Applies the beacon hint to current wiphys */
1959 list_for_each_entry(rdev
, &cfg80211_rdev_list
, list
)
1960 wiphy_update_new_beacon(&rdev
->wiphy
, pending_beacon
);
1962 /* Remembers the beacon hint for new wiphys or reg changes */
1963 list_add_tail(&pending_beacon
->list
, ®_beacon_list
);
1966 spin_unlock_bh(®_pending_beacons_lock
);
1969 static void reg_todo(struct work_struct
*work
)
1972 reg_process_pending_hints();
1973 reg_process_pending_beacon_hints();
1977 static void queue_regulatory_request(struct regulatory_request
*request
)
1979 request
->alpha2
[0] = toupper(request
->alpha2
[0]);
1980 request
->alpha2
[1] = toupper(request
->alpha2
[1]);
1982 spin_lock(®_requests_lock
);
1983 list_add_tail(&request
->list
, ®_requests_list
);
1984 spin_unlock(®_requests_lock
);
1986 schedule_work(®_work
);
1990 * Core regulatory hint -- happens during cfg80211_init()
1991 * and when we restore regulatory settings.
1993 static int regulatory_hint_core(const char *alpha2
)
1995 struct regulatory_request
*request
;
1997 request
= kzalloc(sizeof(struct regulatory_request
), GFP_KERNEL
);
2001 request
->alpha2
[0] = alpha2
[0];
2002 request
->alpha2
[1] = alpha2
[1];
2003 request
->initiator
= NL80211_REGDOM_SET_BY_CORE
;
2005 queue_regulatory_request(request
);
2011 int regulatory_hint_user(const char *alpha2
,
2012 enum nl80211_user_reg_hint_type user_reg_hint_type
)
2014 struct regulatory_request
*request
;
2016 if (WARN_ON(!alpha2
))
2019 request
= kzalloc(sizeof(struct regulatory_request
), GFP_KERNEL
);
2023 request
->wiphy_idx
= WIPHY_IDX_INVALID
;
2024 request
->alpha2
[0] = alpha2
[0];
2025 request
->alpha2
[1] = alpha2
[1];
2026 request
->initiator
= NL80211_REGDOM_SET_BY_USER
;
2027 request
->user_reg_hint_type
= user_reg_hint_type
;
2029 queue_regulatory_request(request
);
2034 int regulatory_hint_indoor_user(void)
2036 struct regulatory_request
*request
;
2038 request
= kzalloc(sizeof(struct regulatory_request
), GFP_KERNEL
);
2042 request
->wiphy_idx
= WIPHY_IDX_INVALID
;
2043 request
->initiator
= NL80211_REGDOM_SET_BY_USER
;
2044 request
->user_reg_hint_type
= NL80211_USER_REG_HINT_INDOOR
;
2045 queue_regulatory_request(request
);
2051 int regulatory_hint(struct wiphy
*wiphy
, const char *alpha2
)
2053 struct regulatory_request
*request
;
2055 if (WARN_ON(!alpha2
|| !wiphy
))
2058 wiphy
->regulatory_flags
&= ~REGULATORY_CUSTOM_REG
;
2060 request
= kzalloc(sizeof(struct regulatory_request
), GFP_KERNEL
);
2064 request
->wiphy_idx
= get_wiphy_idx(wiphy
);
2066 request
->alpha2
[0] = alpha2
[0];
2067 request
->alpha2
[1] = alpha2
[1];
2068 request
->initiator
= NL80211_REGDOM_SET_BY_DRIVER
;
2070 queue_regulatory_request(request
);
2074 EXPORT_SYMBOL(regulatory_hint
);
2076 void regulatory_hint_country_ie(struct wiphy
*wiphy
, enum ieee80211_band band
,
2077 const u8
*country_ie
, u8 country_ie_len
)
2080 enum environment_cap env
= ENVIRON_ANY
;
2081 struct regulatory_request
*request
= NULL
, *lr
;
2083 /* IE len must be evenly divisible by 2 */
2084 if (country_ie_len
& 0x01)
2087 if (country_ie_len
< IEEE80211_COUNTRY_IE_MIN_LEN
)
2090 request
= kzalloc(sizeof(*request
), GFP_KERNEL
);
2094 alpha2
[0] = country_ie
[0];
2095 alpha2
[1] = country_ie
[1];
2097 if (country_ie
[2] == 'I')
2098 env
= ENVIRON_INDOOR
;
2099 else if (country_ie
[2] == 'O')
2100 env
= ENVIRON_OUTDOOR
;
2103 lr
= get_last_request();
2109 * We will run this only upon a successful connection on cfg80211.
2110 * We leave conflict resolution to the workqueue, where can hold
2113 if (lr
->initiator
== NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
2114 lr
->wiphy_idx
!= WIPHY_IDX_INVALID
)
2117 request
->wiphy_idx
= get_wiphy_idx(wiphy
);
2118 request
->alpha2
[0] = alpha2
[0];
2119 request
->alpha2
[1] = alpha2
[1];
2120 request
->initiator
= NL80211_REGDOM_SET_BY_COUNTRY_IE
;
2121 request
->country_ie_env
= env
;
2123 queue_regulatory_request(request
);
2130 static void restore_alpha2(char *alpha2
, bool reset_user
)
2132 /* indicates there is no alpha2 to consider for restoration */
2136 /* The user setting has precedence over the module parameter */
2137 if (is_user_regdom_saved()) {
2138 /* Unless we're asked to ignore it and reset it */
2140 REG_DBG_PRINT("Restoring regulatory settings including user preference\n");
2141 user_alpha2
[0] = '9';
2142 user_alpha2
[1] = '7';
2145 * If we're ignoring user settings, we still need to
2146 * check the module parameter to ensure we put things
2147 * back as they were for a full restore.
2149 if (!is_world_regdom(ieee80211_regdom
)) {
2150 REG_DBG_PRINT("Keeping preference on module parameter ieee80211_regdom: %c%c\n",
2151 ieee80211_regdom
[0], ieee80211_regdom
[1]);
2152 alpha2
[0] = ieee80211_regdom
[0];
2153 alpha2
[1] = ieee80211_regdom
[1];
2156 REG_DBG_PRINT("Restoring regulatory settings while preserving user preference for: %c%c\n",
2157 user_alpha2
[0], user_alpha2
[1]);
2158 alpha2
[0] = user_alpha2
[0];
2159 alpha2
[1] = user_alpha2
[1];
2161 } else if (!is_world_regdom(ieee80211_regdom
)) {
2162 REG_DBG_PRINT("Keeping preference on module parameter ieee80211_regdom: %c%c\n",
2163 ieee80211_regdom
[0], ieee80211_regdom
[1]);
2164 alpha2
[0] = ieee80211_regdom
[0];
2165 alpha2
[1] = ieee80211_regdom
[1];
2167 REG_DBG_PRINT("Restoring regulatory settings\n");
2170 static void restore_custom_reg_settings(struct wiphy
*wiphy
)
2172 struct ieee80211_supported_band
*sband
;
2173 enum ieee80211_band band
;
2174 struct ieee80211_channel
*chan
;
2177 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++) {
2178 sband
= wiphy
->bands
[band
];
2181 for (i
= 0; i
< sband
->n_channels
; i
++) {
2182 chan
= &sband
->channels
[i
];
2183 chan
->flags
= chan
->orig_flags
;
2184 chan
->max_antenna_gain
= chan
->orig_mag
;
2185 chan
->max_power
= chan
->orig_mpwr
;
2186 chan
->beacon_found
= false;
2192 * Restoring regulatory settings involves ingoring any
2193 * possibly stale country IE information and user regulatory
2194 * settings if so desired, this includes any beacon hints
2195 * learned as we could have traveled outside to another country
2196 * after disconnection. To restore regulatory settings we do
2197 * exactly what we did at bootup:
2199 * - send a core regulatory hint
2200 * - send a user regulatory hint if applicable
2202 * Device drivers that send a regulatory hint for a specific country
2203 * keep their own regulatory domain on wiphy->regd so that does does
2204 * not need to be remembered.
2206 static void restore_regulatory_settings(bool reset_user
)
2209 char world_alpha2
[2];
2210 struct reg_beacon
*reg_beacon
, *btmp
;
2211 struct regulatory_request
*reg_request
, *tmp
;
2212 LIST_HEAD(tmp_reg_req_list
);
2213 struct cfg80211_registered_device
*rdev
;
2217 reg_is_indoor
= false;
2219 reset_regdomains(true, &world_regdom
);
2220 restore_alpha2(alpha2
, reset_user
);
2223 * If there's any pending requests we simply
2224 * stash them to a temporary pending queue and
2225 * add then after we've restored regulatory
2228 spin_lock(®_requests_lock
);
2229 list_for_each_entry_safe(reg_request
, tmp
, ®_requests_list
, list
) {
2230 if (reg_request
->initiator
!= NL80211_REGDOM_SET_BY_USER
)
2232 list_move_tail(®_request
->list
, &tmp_reg_req_list
);
2234 spin_unlock(®_requests_lock
);
2236 /* Clear beacon hints */
2237 spin_lock_bh(®_pending_beacons_lock
);
2238 list_for_each_entry_safe(reg_beacon
, btmp
, ®_pending_beacons
, list
) {
2239 list_del(®_beacon
->list
);
2242 spin_unlock_bh(®_pending_beacons_lock
);
2244 list_for_each_entry_safe(reg_beacon
, btmp
, ®_beacon_list
, list
) {
2245 list_del(®_beacon
->list
);
2249 /* First restore to the basic regulatory settings */
2250 world_alpha2
[0] = cfg80211_world_regdom
->alpha2
[0];
2251 world_alpha2
[1] = cfg80211_world_regdom
->alpha2
[1];
2253 list_for_each_entry(rdev
, &cfg80211_rdev_list
, list
) {
2254 if (rdev
->wiphy
.regulatory_flags
& REGULATORY_CUSTOM_REG
)
2255 restore_custom_reg_settings(&rdev
->wiphy
);
2258 regulatory_hint_core(world_alpha2
);
2261 * This restores the ieee80211_regdom module parameter
2262 * preference or the last user requested regulatory
2263 * settings, user regulatory settings takes precedence.
2265 if (is_an_alpha2(alpha2
))
2266 regulatory_hint_user(user_alpha2
, NL80211_USER_REG_HINT_USER
);
2268 spin_lock(®_requests_lock
);
2269 list_splice_tail_init(&tmp_reg_req_list
, ®_requests_list
);
2270 spin_unlock(®_requests_lock
);
2272 REG_DBG_PRINT("Kicking the queue\n");
2274 schedule_work(®_work
);
2277 void regulatory_hint_disconnect(void)
2279 REG_DBG_PRINT("All devices are disconnected, going to restore regulatory settings\n");
2280 restore_regulatory_settings(false);
2283 static bool freq_is_chan_12_13_14(u16 freq
)
2285 if (freq
== ieee80211_channel_to_frequency(12, IEEE80211_BAND_2GHZ
) ||
2286 freq
== ieee80211_channel_to_frequency(13, IEEE80211_BAND_2GHZ
) ||
2287 freq
== ieee80211_channel_to_frequency(14, IEEE80211_BAND_2GHZ
))
2292 static bool pending_reg_beacon(struct ieee80211_channel
*beacon_chan
)
2294 struct reg_beacon
*pending_beacon
;
2296 list_for_each_entry(pending_beacon
, ®_pending_beacons
, list
)
2297 if (beacon_chan
->center_freq
==
2298 pending_beacon
->chan
.center_freq
)
2303 int regulatory_hint_found_beacon(struct wiphy
*wiphy
,
2304 struct ieee80211_channel
*beacon_chan
,
2307 struct reg_beacon
*reg_beacon
;
2310 if (beacon_chan
->beacon_found
||
2311 beacon_chan
->flags
& IEEE80211_CHAN_RADAR
||
2312 (beacon_chan
->band
== IEEE80211_BAND_2GHZ
&&
2313 !freq_is_chan_12_13_14(beacon_chan
->center_freq
)))
2316 spin_lock_bh(®_pending_beacons_lock
);
2317 processing
= pending_reg_beacon(beacon_chan
);
2318 spin_unlock_bh(®_pending_beacons_lock
);
2323 reg_beacon
= kzalloc(sizeof(struct reg_beacon
), gfp
);
2327 REG_DBG_PRINT("Found new beacon on frequency: %d MHz (Ch %d) on %s\n",
2328 beacon_chan
->center_freq
,
2329 ieee80211_frequency_to_channel(beacon_chan
->center_freq
),
2332 memcpy(®_beacon
->chan
, beacon_chan
,
2333 sizeof(struct ieee80211_channel
));
2336 * Since we can be called from BH or and non-BH context
2337 * we must use spin_lock_bh()
2339 spin_lock_bh(®_pending_beacons_lock
);
2340 list_add_tail(®_beacon
->list
, ®_pending_beacons
);
2341 spin_unlock_bh(®_pending_beacons_lock
);
2343 schedule_work(®_work
);
2348 static void print_rd_rules(const struct ieee80211_regdomain
*rd
)
2351 const struct ieee80211_reg_rule
*reg_rule
= NULL
;
2352 const struct ieee80211_freq_range
*freq_range
= NULL
;
2353 const struct ieee80211_power_rule
*power_rule
= NULL
;
2354 char bw
[32], cac_time
[32];
2356 pr_info(" (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp), (dfs_cac_time)\n");
2358 for (i
= 0; i
< rd
->n_reg_rules
; i
++) {
2359 reg_rule
= &rd
->reg_rules
[i
];
2360 freq_range
= ®_rule
->freq_range
;
2361 power_rule
= ®_rule
->power_rule
;
2363 if (reg_rule
->flags
& NL80211_RRF_AUTO_BW
)
2364 snprintf(bw
, sizeof(bw
), "%d KHz, %d KHz AUTO",
2365 freq_range
->max_bandwidth_khz
,
2366 reg_get_max_bandwidth(rd
, reg_rule
));
2368 snprintf(bw
, sizeof(bw
), "%d KHz",
2369 freq_range
->max_bandwidth_khz
);
2371 if (reg_rule
->flags
& NL80211_RRF_DFS
)
2372 scnprintf(cac_time
, sizeof(cac_time
), "%u s",
2373 reg_rule
->dfs_cac_ms
/1000);
2375 scnprintf(cac_time
, sizeof(cac_time
), "N/A");
2379 * There may not be documentation for max antenna gain
2380 * in certain regions
2382 if (power_rule
->max_antenna_gain
)
2383 pr_info(" (%d KHz - %d KHz @ %s), (%d mBi, %d mBm), (%s)\n",
2384 freq_range
->start_freq_khz
,
2385 freq_range
->end_freq_khz
,
2387 power_rule
->max_antenna_gain
,
2388 power_rule
->max_eirp
,
2391 pr_info(" (%d KHz - %d KHz @ %s), (N/A, %d mBm), (%s)\n",
2392 freq_range
->start_freq_khz
,
2393 freq_range
->end_freq_khz
,
2395 power_rule
->max_eirp
,
2400 bool reg_supported_dfs_region(enum nl80211_dfs_regions dfs_region
)
2402 switch (dfs_region
) {
2403 case NL80211_DFS_UNSET
:
2404 case NL80211_DFS_FCC
:
2405 case NL80211_DFS_ETSI
:
2406 case NL80211_DFS_JP
:
2409 REG_DBG_PRINT("Ignoring uknown DFS master region: %d\n",
2415 static void print_regdomain(const struct ieee80211_regdomain
*rd
)
2417 struct regulatory_request
*lr
= get_last_request();
2419 if (is_intersected_alpha2(rd
->alpha2
)) {
2420 if (lr
->initiator
== NL80211_REGDOM_SET_BY_COUNTRY_IE
) {
2421 struct cfg80211_registered_device
*rdev
;
2422 rdev
= cfg80211_rdev_by_wiphy_idx(lr
->wiphy_idx
);
2424 pr_info("Current regulatory domain updated by AP to: %c%c\n",
2425 rdev
->country_ie_alpha2
[0],
2426 rdev
->country_ie_alpha2
[1]);
2428 pr_info("Current regulatory domain intersected:\n");
2430 pr_info("Current regulatory domain intersected:\n");
2431 } else if (is_world_regdom(rd
->alpha2
)) {
2432 pr_info("World regulatory domain updated:\n");
2434 if (is_unknown_alpha2(rd
->alpha2
))
2435 pr_info("Regulatory domain changed to driver built-in settings (unknown country)\n");
2437 if (reg_request_cell_base(lr
))
2438 pr_info("Regulatory domain changed to country: %c%c by Cell Station\n",
2439 rd
->alpha2
[0], rd
->alpha2
[1]);
2441 pr_info("Regulatory domain changed to country: %c%c\n",
2442 rd
->alpha2
[0], rd
->alpha2
[1]);
2446 pr_info(" DFS Master region: %s", reg_dfs_region_str(rd
->dfs_region
));
2450 static void print_regdomain_info(const struct ieee80211_regdomain
*rd
)
2452 pr_info("Regulatory domain: %c%c\n", rd
->alpha2
[0], rd
->alpha2
[1]);
2456 static int reg_set_rd_core(const struct ieee80211_regdomain
*rd
)
2458 if (!is_world_regdom(rd
->alpha2
))
2460 update_world_regdomain(rd
);
2464 static int reg_set_rd_user(const struct ieee80211_regdomain
*rd
,
2465 struct regulatory_request
*user_request
)
2467 const struct ieee80211_regdomain
*intersected_rd
= NULL
;
2469 if (!regdom_changes(rd
->alpha2
))
2472 if (!is_valid_rd(rd
)) {
2473 pr_err("Invalid regulatory domain detected:\n");
2474 print_regdomain_info(rd
);
2478 if (!user_request
->intersect
) {
2479 reset_regdomains(false, rd
);
2483 intersected_rd
= regdom_intersect(rd
, get_cfg80211_regdom());
2484 if (!intersected_rd
)
2489 reset_regdomains(false, intersected_rd
);
2494 static int reg_set_rd_driver(const struct ieee80211_regdomain
*rd
,
2495 struct regulatory_request
*driver_request
)
2497 const struct ieee80211_regdomain
*regd
;
2498 const struct ieee80211_regdomain
*intersected_rd
= NULL
;
2499 const struct ieee80211_regdomain
*tmp
;
2500 struct wiphy
*request_wiphy
;
2502 if (is_world_regdom(rd
->alpha2
))
2505 if (!regdom_changes(rd
->alpha2
))
2508 if (!is_valid_rd(rd
)) {
2509 pr_err("Invalid regulatory domain detected:\n");
2510 print_regdomain_info(rd
);
2514 request_wiphy
= wiphy_idx_to_wiphy(driver_request
->wiphy_idx
);
2515 if (!request_wiphy
) {
2516 queue_delayed_work(system_power_efficient_wq
,
2521 if (!driver_request
->intersect
) {
2522 if (request_wiphy
->regd
)
2525 regd
= reg_copy_regd(rd
);
2527 return PTR_ERR(regd
);
2529 rcu_assign_pointer(request_wiphy
->regd
, regd
);
2530 reset_regdomains(false, rd
);
2534 intersected_rd
= regdom_intersect(rd
, get_cfg80211_regdom());
2535 if (!intersected_rd
)
2539 * We can trash what CRDA provided now.
2540 * However if a driver requested this specific regulatory
2541 * domain we keep it for its private use
2543 tmp
= get_wiphy_regdom(request_wiphy
);
2544 rcu_assign_pointer(request_wiphy
->regd
, rd
);
2545 rcu_free_regdom(tmp
);
2549 reset_regdomains(false, intersected_rd
);
2554 static int reg_set_rd_country_ie(const struct ieee80211_regdomain
*rd
,
2555 struct regulatory_request
*country_ie_request
)
2557 struct wiphy
*request_wiphy
;
2559 if (!is_alpha2_set(rd
->alpha2
) && !is_an_alpha2(rd
->alpha2
) &&
2560 !is_unknown_alpha2(rd
->alpha2
))
2564 * Lets only bother proceeding on the same alpha2 if the current
2565 * rd is non static (it means CRDA was present and was used last)
2566 * and the pending request came in from a country IE
2569 if (!is_valid_rd(rd
)) {
2570 pr_err("Invalid regulatory domain detected:\n");
2571 print_regdomain_info(rd
);
2575 request_wiphy
= wiphy_idx_to_wiphy(country_ie_request
->wiphy_idx
);
2576 if (!request_wiphy
) {
2577 queue_delayed_work(system_power_efficient_wq
,
2582 if (country_ie_request
->intersect
)
2585 reset_regdomains(false, rd
);
2590 * Use this call to set the current regulatory domain. Conflicts with
2591 * multiple drivers can be ironed out later. Caller must've already
2592 * kmalloc'd the rd structure.
2594 int set_regdom(const struct ieee80211_regdomain
*rd
)
2596 struct regulatory_request
*lr
;
2597 bool user_reset
= false;
2600 if (!reg_is_valid_request(rd
->alpha2
)) {
2605 lr
= get_last_request();
2607 /* Note that this doesn't update the wiphys, this is done below */
2608 switch (lr
->initiator
) {
2609 case NL80211_REGDOM_SET_BY_CORE
:
2610 r
= reg_set_rd_core(rd
);
2612 case NL80211_REGDOM_SET_BY_USER
:
2613 r
= reg_set_rd_user(rd
, lr
);
2616 case NL80211_REGDOM_SET_BY_DRIVER
:
2617 r
= reg_set_rd_driver(rd
, lr
);
2619 case NL80211_REGDOM_SET_BY_COUNTRY_IE
:
2620 r
= reg_set_rd_country_ie(rd
, lr
);
2623 WARN(1, "invalid initiator %d\n", lr
->initiator
);
2630 reg_set_request_processed();
2633 /* Back to world regulatory in case of errors */
2634 restore_regulatory_settings(user_reset
);
2641 /* This would make this whole thing pointless */
2642 if (WARN_ON(!lr
->intersect
&& rd
!= get_cfg80211_regdom()))
2645 /* update all wiphys now with the new established regulatory domain */
2646 update_all_wiphy_regulatory(lr
->initiator
);
2648 print_regdomain(get_cfg80211_regdom());
2650 nl80211_send_reg_change_event(lr
);
2652 reg_set_request_processed();
2657 void wiphy_regulatory_register(struct wiphy
*wiphy
)
2659 struct regulatory_request
*lr
;
2661 if (!reg_dev_ignore_cell_hint(wiphy
))
2662 reg_num_devs_support_basehint
++;
2664 lr
= get_last_request();
2665 wiphy_update_regulatory(wiphy
, lr
->initiator
);
2668 void wiphy_regulatory_deregister(struct wiphy
*wiphy
)
2670 struct wiphy
*request_wiphy
= NULL
;
2671 struct regulatory_request
*lr
;
2673 lr
= get_last_request();
2675 if (!reg_dev_ignore_cell_hint(wiphy
))
2676 reg_num_devs_support_basehint
--;
2678 rcu_free_regdom(get_wiphy_regdom(wiphy
));
2679 RCU_INIT_POINTER(wiphy
->regd
, NULL
);
2682 request_wiphy
= wiphy_idx_to_wiphy(lr
->wiphy_idx
);
2684 if (!request_wiphy
|| request_wiphy
!= wiphy
)
2687 lr
->wiphy_idx
= WIPHY_IDX_INVALID
;
2688 lr
->country_ie_env
= ENVIRON_ANY
;
2691 static void reg_timeout_work(struct work_struct
*work
)
2693 REG_DBG_PRINT("Timeout while waiting for CRDA to reply, restoring regulatory settings\n");
2695 restore_regulatory_settings(true);
2700 * See http://www.fcc.gov/document/5-ghz-unlicensed-spectrum-unii, for
2701 * UNII band definitions
2703 int cfg80211_get_unii(int freq
)
2706 if (freq
>= 5150 && freq
<= 5250)
2710 if (freq
> 5250 && freq
<= 5350)
2714 if (freq
> 5350 && freq
<= 5470)
2718 if (freq
> 5470 && freq
<= 5725)
2722 if (freq
> 5725 && freq
<= 5825)
2728 bool regulatory_indoor_allowed(void)
2730 return reg_is_indoor
;
2733 int __init
regulatory_init(void)
2737 reg_pdev
= platform_device_register_simple("regulatory", 0, NULL
, 0);
2738 if (IS_ERR(reg_pdev
))
2739 return PTR_ERR(reg_pdev
);
2741 spin_lock_init(®_requests_lock
);
2742 spin_lock_init(®_pending_beacons_lock
);
2744 reg_regdb_size_check();
2746 rcu_assign_pointer(cfg80211_regdomain
, cfg80211_world_regdom
);
2748 user_alpha2
[0] = '9';
2749 user_alpha2
[1] = '7';
2751 /* We always try to get an update for the static regdomain */
2752 err
= regulatory_hint_core(cfg80211_world_regdom
->alpha2
);
2757 * N.B. kobject_uevent_env() can fail mainly for when we're out
2758 * memory which is handled and propagated appropriately above
2759 * but it can also fail during a netlink_broadcast() or during
2760 * early boot for call_usermodehelper(). For now treat these
2761 * errors as non-fatal.
2763 pr_err("kobject_uevent_env() was unable to call CRDA during init\n");
2767 * Finally, if the user set the module parameter treat it
2770 if (!is_world_regdom(ieee80211_regdom
))
2771 regulatory_hint_user(ieee80211_regdom
,
2772 NL80211_USER_REG_HINT_USER
);
2777 void regulatory_exit(void)
2779 struct regulatory_request
*reg_request
, *tmp
;
2780 struct reg_beacon
*reg_beacon
, *btmp
;
2782 cancel_work_sync(®_work
);
2783 cancel_delayed_work_sync(®_timeout
);
2785 /* Lock to suppress warnings */
2787 reset_regdomains(true, NULL
);
2790 dev_set_uevent_suppress(®_pdev
->dev
, true);
2792 platform_device_unregister(reg_pdev
);
2794 list_for_each_entry_safe(reg_beacon
, btmp
, ®_pending_beacons
, list
) {
2795 list_del(®_beacon
->list
);
2799 list_for_each_entry_safe(reg_beacon
, btmp
, ®_beacon_list
, list
) {
2800 list_del(®_beacon
->list
);
2804 list_for_each_entry_safe(reg_request
, tmp
, ®_requests_list
, list
) {
2805 list_del(®_request
->list
);