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>
6 * Copyright 2013-2014 Intel Mobile Communications GmbH
8 * Permission to use, copy, modify, and/or distribute this software for any
9 * purpose with or without fee is hereby granted, provided that the above
10 * copyright notice and this permission notice appear in all copies.
12 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
13 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
14 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
15 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
16 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
17 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
18 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
23 * DOC: Wireless regulatory infrastructure
25 * The usual implementation is for a driver to read a device EEPROM to
26 * determine which regulatory domain it should be operating under, then
27 * looking up the allowable channels in a driver-local table and finally
28 * registering those channels in the wiphy structure.
30 * Another set of compliance enforcement is for drivers to use their
31 * own compliance limits which can be stored on the EEPROM. The host
32 * driver or firmware may ensure these are used.
34 * In addition to all this we provide an extra layer of regulatory
35 * conformance. For drivers which do not have any regulatory
36 * information CRDA provides the complete regulatory solution.
37 * For others it provides a community effort on further restrictions
38 * to enhance compliance.
40 * Note: When number of rules --> infinity we will not be able to
41 * index on alpha2 any more, instead we'll probably have to
42 * rely on some SHA1 checksum of the regdomain for example.
46 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
48 #include <linux/kernel.h>
49 #include <linux/export.h>
50 #include <linux/slab.h>
51 #include <linux/list.h>
52 #include <linux/ctype.h>
53 #include <linux/nl80211.h>
54 #include <linux/platform_device.h>
55 #include <linux/moduleparam.h>
56 #include <net/cfg80211.h>
63 #ifdef CONFIG_CFG80211_REG_DEBUG
64 #define REG_DBG_PRINT(format, args...) \
65 printk(KERN_DEBUG pr_fmt(format), ##args)
67 #define REG_DBG_PRINT(args...)
71 * Grace period we give before making sure all current interfaces reside on
72 * channels allowed by the current regulatory domain.
74 #define REG_ENFORCE_GRACE_MS 60000
77 * enum reg_request_treatment - regulatory request treatment
79 * @REG_REQ_OK: continue processing the regulatory request
80 * @REG_REQ_IGNORE: ignore the regulatory request
81 * @REG_REQ_INTERSECT: the regulatory domain resulting from this request should
82 * be intersected with the current one.
83 * @REG_REQ_ALREADY_SET: the regulatory request will not change the current
84 * regulatory settings, and no further processing is required.
85 * @REG_REQ_USER_HINT_HANDLED: a non alpha2 user hint was handled and no
86 * further processing is required, i.e., not need to update last_request
87 * etc. This should be used for user hints that do not provide an alpha2
88 * but some other type of regulatory hint, i.e., indoor operation.
90 enum reg_request_treatment
{
95 REG_REQ_USER_HINT_HANDLED
,
98 static struct regulatory_request core_request_world
= {
99 .initiator
= NL80211_REGDOM_SET_BY_CORE
,
104 .country_ie_env
= ENVIRON_ANY
,
108 * Receipt of information from last regulatory request,
109 * protected by RTNL (and can be accessed with RCU protection)
111 static struct regulatory_request __rcu
*last_request
=
112 (void __force __rcu
*)&core_request_world
;
114 /* To trigger userspace events */
115 static struct platform_device
*reg_pdev
;
118 * Central wireless core regulatory domains, we only need two,
119 * the current one and a world regulatory domain in case we have no
120 * information to give us an alpha2.
121 * (protected by RTNL, can be read under RCU)
123 const struct ieee80211_regdomain __rcu
*cfg80211_regdomain
;
126 * Number of devices that registered to the core
127 * that support cellular base station regulatory hints
128 * (protected by RTNL)
130 static int reg_num_devs_support_basehint
;
133 * State variable indicating if the platform on which the devices
134 * are attached is operating in an indoor environment. The state variable
135 * is relevant for all registered devices.
136 * (protected by RTNL)
138 static bool reg_is_indoor
;
140 static const struct ieee80211_regdomain
*get_cfg80211_regdom(void)
142 return rtnl_dereference(cfg80211_regdomain
);
145 const struct ieee80211_regdomain
*get_wiphy_regdom(struct wiphy
*wiphy
)
147 return rtnl_dereference(wiphy
->regd
);
150 static const char *reg_dfs_region_str(enum nl80211_dfs_regions dfs_region
)
152 switch (dfs_region
) {
153 case NL80211_DFS_UNSET
:
155 case NL80211_DFS_FCC
:
157 case NL80211_DFS_ETSI
:
165 enum nl80211_dfs_regions
reg_get_dfs_region(struct wiphy
*wiphy
)
167 const struct ieee80211_regdomain
*regd
= NULL
;
168 const struct ieee80211_regdomain
*wiphy_regd
= NULL
;
170 regd
= get_cfg80211_regdom();
174 wiphy_regd
= get_wiphy_regdom(wiphy
);
178 if (wiphy_regd
->dfs_region
== regd
->dfs_region
)
181 REG_DBG_PRINT("%s: device specific dfs_region "
182 "(%s) disagrees with cfg80211's "
183 "central dfs_region (%s)\n",
184 dev_name(&wiphy
->dev
),
185 reg_dfs_region_str(wiphy_regd
->dfs_region
),
186 reg_dfs_region_str(regd
->dfs_region
));
189 return regd
->dfs_region
;
192 static void rcu_free_regdom(const struct ieee80211_regdomain
*r
)
196 kfree_rcu((struct ieee80211_regdomain
*)r
, rcu_head
);
199 static struct regulatory_request
*get_last_request(void)
201 return rcu_dereference_rtnl(last_request
);
204 /* Used to queue up regulatory hints */
205 static LIST_HEAD(reg_requests_list
);
206 static spinlock_t reg_requests_lock
;
208 /* Used to queue up beacon hints for review */
209 static LIST_HEAD(reg_pending_beacons
);
210 static spinlock_t reg_pending_beacons_lock
;
212 /* Used to keep track of processed beacon hints */
213 static LIST_HEAD(reg_beacon_list
);
216 struct list_head list
;
217 struct ieee80211_channel chan
;
220 static void reg_check_chans_work(struct work_struct
*work
);
221 static DECLARE_DELAYED_WORK(reg_check_chans
, reg_check_chans_work
);
223 static void reg_todo(struct work_struct
*work
);
224 static DECLARE_WORK(reg_work
, reg_todo
);
226 static void reg_timeout_work(struct work_struct
*work
);
227 static DECLARE_DELAYED_WORK(reg_timeout
, reg_timeout_work
);
229 /* We keep a static world regulatory domain in case of the absence of CRDA */
230 static const struct ieee80211_regdomain world_regdom
= {
234 /* IEEE 802.11b/g, channels 1..11 */
235 REG_RULE(2412-10, 2462+10, 40, 6, 20, 0),
236 /* IEEE 802.11b/g, channels 12..13. */
237 REG_RULE(2467-10, 2472+10, 40, 6, 20,
239 /* IEEE 802.11 channel 14 - Only JP enables
240 * this and for 802.11b only */
241 REG_RULE(2484-10, 2484+10, 20, 6, 20,
243 NL80211_RRF_NO_OFDM
),
244 /* IEEE 802.11a, channel 36..48 */
245 REG_RULE(5180-10, 5240+10, 160, 6, 20,
248 /* IEEE 802.11a, channel 52..64 - DFS required */
249 REG_RULE(5260-10, 5320+10, 160, 6, 20,
253 /* IEEE 802.11a, channel 100..144 - DFS required */
254 REG_RULE(5500-10, 5720+10, 160, 6, 20,
258 /* IEEE 802.11a, channel 149..165 */
259 REG_RULE(5745-10, 5825+10, 80, 6, 20,
262 /* IEEE 802.11ad (60gHz), channels 1..3 */
263 REG_RULE(56160+2160*1-1080, 56160+2160*3+1080, 2160, 0, 0, 0),
267 /* protected by RTNL */
268 static const struct ieee80211_regdomain
*cfg80211_world_regdom
=
271 static char *ieee80211_regdom
= "00";
272 static char user_alpha2
[2];
274 module_param(ieee80211_regdom
, charp
, 0444);
275 MODULE_PARM_DESC(ieee80211_regdom
, "IEEE 802.11 regulatory domain code");
277 static void reg_free_request(struct regulatory_request
*request
)
279 if (request
!= get_last_request())
283 static void reg_free_last_request(void)
285 struct regulatory_request
*lr
= get_last_request();
287 if (lr
!= &core_request_world
&& lr
)
288 kfree_rcu(lr
, rcu_head
);
291 static void reg_update_last_request(struct regulatory_request
*request
)
293 struct regulatory_request
*lr
;
295 lr
= get_last_request();
299 reg_free_last_request();
300 rcu_assign_pointer(last_request
, request
);
303 static void reset_regdomains(bool full_reset
,
304 const struct ieee80211_regdomain
*new_regdom
)
306 const struct ieee80211_regdomain
*r
;
310 r
= get_cfg80211_regdom();
312 /* avoid freeing static information or freeing something twice */
313 if (r
== cfg80211_world_regdom
)
315 if (cfg80211_world_regdom
== &world_regdom
)
316 cfg80211_world_regdom
= NULL
;
317 if (r
== &world_regdom
)
321 rcu_free_regdom(cfg80211_world_regdom
);
323 cfg80211_world_regdom
= &world_regdom
;
324 rcu_assign_pointer(cfg80211_regdomain
, new_regdom
);
329 reg_update_last_request(&core_request_world
);
333 * Dynamic world regulatory domain requested by the wireless
334 * core upon initialization
336 static void update_world_regdomain(const struct ieee80211_regdomain
*rd
)
338 struct regulatory_request
*lr
;
340 lr
= get_last_request();
344 reset_regdomains(false, rd
);
346 cfg80211_world_regdom
= rd
;
349 bool is_world_regdom(const char *alpha2
)
353 return alpha2
[0] == '0' && alpha2
[1] == '0';
356 static bool is_alpha2_set(const char *alpha2
)
360 return alpha2
[0] && alpha2
[1];
363 static bool is_unknown_alpha2(const char *alpha2
)
368 * Special case where regulatory domain was built by driver
369 * but a specific alpha2 cannot be determined
371 return alpha2
[0] == '9' && alpha2
[1] == '9';
374 static bool is_intersected_alpha2(const char *alpha2
)
379 * Special case where regulatory domain is the
380 * result of an intersection between two regulatory domain
383 return alpha2
[0] == '9' && alpha2
[1] == '8';
386 static bool is_an_alpha2(const char *alpha2
)
390 return isalpha(alpha2
[0]) && isalpha(alpha2
[1]);
393 static bool alpha2_equal(const char *alpha2_x
, const char *alpha2_y
)
395 if (!alpha2_x
|| !alpha2_y
)
397 return alpha2_x
[0] == alpha2_y
[0] && alpha2_x
[1] == alpha2_y
[1];
400 static bool regdom_changes(const char *alpha2
)
402 const struct ieee80211_regdomain
*r
= get_cfg80211_regdom();
406 return !alpha2_equal(r
->alpha2
, alpha2
);
410 * The NL80211_REGDOM_SET_BY_USER regdom alpha2 is cached, this lets
411 * you know if a valid regulatory hint with NL80211_REGDOM_SET_BY_USER
412 * has ever been issued.
414 static bool is_user_regdom_saved(void)
416 if (user_alpha2
[0] == '9' && user_alpha2
[1] == '7')
419 /* This would indicate a mistake on the design */
420 if (WARN(!is_world_regdom(user_alpha2
) && !is_an_alpha2(user_alpha2
),
421 "Unexpected user alpha2: %c%c\n",
422 user_alpha2
[0], user_alpha2
[1]))
428 static const struct ieee80211_regdomain
*
429 reg_copy_regd(const struct ieee80211_regdomain
*src_regd
)
431 struct ieee80211_regdomain
*regd
;
436 sizeof(struct ieee80211_regdomain
) +
437 src_regd
->n_reg_rules
* sizeof(struct ieee80211_reg_rule
);
439 regd
= kzalloc(size_of_regd
, GFP_KERNEL
);
441 return ERR_PTR(-ENOMEM
);
443 memcpy(regd
, src_regd
, sizeof(struct ieee80211_regdomain
));
445 for (i
= 0; i
< src_regd
->n_reg_rules
; i
++)
446 memcpy(®d
->reg_rules
[i
], &src_regd
->reg_rules
[i
],
447 sizeof(struct ieee80211_reg_rule
));
452 #ifdef CONFIG_CFG80211_INTERNAL_REGDB
453 struct reg_regdb_search_request
{
455 struct list_head list
;
458 static LIST_HEAD(reg_regdb_search_list
);
459 static DEFINE_MUTEX(reg_regdb_search_mutex
);
461 static void reg_regdb_search(struct work_struct
*work
)
463 struct reg_regdb_search_request
*request
;
464 const struct ieee80211_regdomain
*curdom
, *regdom
= NULL
;
469 mutex_lock(®_regdb_search_mutex
);
470 while (!list_empty(®_regdb_search_list
)) {
471 request
= list_first_entry(®_regdb_search_list
,
472 struct reg_regdb_search_request
,
474 list_del(&request
->list
);
476 for (i
= 0; i
< reg_regdb_size
; i
++) {
477 curdom
= reg_regdb
[i
];
479 if (alpha2_equal(request
->alpha2
, curdom
->alpha2
)) {
480 regdom
= reg_copy_regd(curdom
);
487 mutex_unlock(®_regdb_search_mutex
);
489 if (!IS_ERR_OR_NULL(regdom
))
495 static DECLARE_WORK(reg_regdb_work
, reg_regdb_search
);
497 static void reg_regdb_query(const char *alpha2
)
499 struct reg_regdb_search_request
*request
;
504 request
= kzalloc(sizeof(struct reg_regdb_search_request
), GFP_KERNEL
);
508 memcpy(request
->alpha2
, alpha2
, 2);
510 mutex_lock(®_regdb_search_mutex
);
511 list_add_tail(&request
->list
, ®_regdb_search_list
);
512 mutex_unlock(®_regdb_search_mutex
);
514 schedule_work(®_regdb_work
);
517 /* Feel free to add any other sanity checks here */
518 static void reg_regdb_size_check(void)
520 /* We should ideally BUILD_BUG_ON() but then random builds would fail */
521 WARN_ONCE(!reg_regdb_size
, "db.txt is empty, you should update it...");
524 static inline void reg_regdb_size_check(void) {}
525 static inline void reg_regdb_query(const char *alpha2
) {}
526 #endif /* CONFIG_CFG80211_INTERNAL_REGDB */
529 * This lets us keep regulatory code which is updated on a regulatory
530 * basis in userspace.
532 static int call_crda(const char *alpha2
)
535 char *env
[] = { country
, NULL
};
537 snprintf(country
, sizeof(country
), "COUNTRY=%c%c",
538 alpha2
[0], alpha2
[1]);
540 if (!is_world_regdom((char *) alpha2
))
541 pr_info("Calling CRDA for country: %c%c\n",
542 alpha2
[0], alpha2
[1]);
544 pr_info("Calling CRDA to update world regulatory domain\n");
546 /* query internal regulatory database (if it exists) */
547 reg_regdb_query(alpha2
);
549 return kobject_uevent_env(®_pdev
->dev
.kobj
, KOBJ_CHANGE
, env
);
552 static enum reg_request_treatment
553 reg_call_crda(struct regulatory_request
*request
)
555 if (call_crda(request
->alpha2
))
556 return REG_REQ_IGNORE
;
560 bool reg_is_valid_request(const char *alpha2
)
562 struct regulatory_request
*lr
= get_last_request();
564 if (!lr
|| lr
->processed
)
567 return alpha2_equal(lr
->alpha2
, alpha2
);
570 static const struct ieee80211_regdomain
*reg_get_regdomain(struct wiphy
*wiphy
)
572 struct regulatory_request
*lr
= get_last_request();
575 * Follow the driver's regulatory domain, if present, unless a country
576 * IE has been processed or a user wants to help complaince further
578 if (lr
->initiator
!= NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
579 lr
->initiator
!= NL80211_REGDOM_SET_BY_USER
&&
581 return get_wiphy_regdom(wiphy
);
583 return get_cfg80211_regdom();
587 reg_get_max_bandwidth_from_range(const struct ieee80211_regdomain
*rd
,
588 const struct ieee80211_reg_rule
*rule
)
590 const struct ieee80211_freq_range
*freq_range
= &rule
->freq_range
;
591 const struct ieee80211_freq_range
*freq_range_tmp
;
592 const struct ieee80211_reg_rule
*tmp
;
593 u32 start_freq
, end_freq
, idx
, no
;
595 for (idx
= 0; idx
< rd
->n_reg_rules
; idx
++)
596 if (rule
== &rd
->reg_rules
[idx
])
599 if (idx
== rd
->n_reg_rules
)
606 tmp
= &rd
->reg_rules
[--no
];
607 freq_range_tmp
= &tmp
->freq_range
;
609 if (freq_range_tmp
->end_freq_khz
< freq_range
->start_freq_khz
)
612 freq_range
= freq_range_tmp
;
615 start_freq
= freq_range
->start_freq_khz
;
618 freq_range
= &rule
->freq_range
;
621 while (no
< rd
->n_reg_rules
- 1) {
622 tmp
= &rd
->reg_rules
[++no
];
623 freq_range_tmp
= &tmp
->freq_range
;
625 if (freq_range_tmp
->start_freq_khz
> freq_range
->end_freq_khz
)
628 freq_range
= freq_range_tmp
;
631 end_freq
= freq_range
->end_freq_khz
;
633 return end_freq
- start_freq
;
636 unsigned int reg_get_max_bandwidth(const struct ieee80211_regdomain
*rd
,
637 const struct ieee80211_reg_rule
*rule
)
639 unsigned int bw
= reg_get_max_bandwidth_from_range(rd
, rule
);
641 if (rule
->flags
& NL80211_RRF_NO_160MHZ
)
642 bw
= min_t(unsigned int, bw
, MHZ_TO_KHZ(80));
643 if (rule
->flags
& NL80211_RRF_NO_80MHZ
)
644 bw
= min_t(unsigned int, bw
, MHZ_TO_KHZ(40));
647 * HT40+/HT40- limits are handled per-channel. Only limit BW if both
650 if (rule
->flags
& NL80211_RRF_NO_HT40MINUS
&&
651 rule
->flags
& NL80211_RRF_NO_HT40PLUS
)
652 bw
= min_t(unsigned int, bw
, MHZ_TO_KHZ(20));
657 /* Sanity check on a regulatory rule */
658 static bool is_valid_reg_rule(const struct ieee80211_reg_rule
*rule
)
660 const struct ieee80211_freq_range
*freq_range
= &rule
->freq_range
;
663 if (freq_range
->start_freq_khz
<= 0 || freq_range
->end_freq_khz
<= 0)
666 if (freq_range
->start_freq_khz
> freq_range
->end_freq_khz
)
669 freq_diff
= freq_range
->end_freq_khz
- freq_range
->start_freq_khz
;
671 if (freq_range
->end_freq_khz
<= freq_range
->start_freq_khz
||
672 freq_range
->max_bandwidth_khz
> freq_diff
)
678 static bool is_valid_rd(const struct ieee80211_regdomain
*rd
)
680 const struct ieee80211_reg_rule
*reg_rule
= NULL
;
683 if (!rd
->n_reg_rules
)
686 if (WARN_ON(rd
->n_reg_rules
> NL80211_MAX_SUPP_REG_RULES
))
689 for (i
= 0; i
< rd
->n_reg_rules
; i
++) {
690 reg_rule
= &rd
->reg_rules
[i
];
691 if (!is_valid_reg_rule(reg_rule
))
698 static bool reg_does_bw_fit(const struct ieee80211_freq_range
*freq_range
,
699 u32 center_freq_khz
, u32 bw_khz
)
701 u32 start_freq_khz
, end_freq_khz
;
703 start_freq_khz
= center_freq_khz
- (bw_khz
/2);
704 end_freq_khz
= center_freq_khz
+ (bw_khz
/2);
706 if (start_freq_khz
>= freq_range
->start_freq_khz
&&
707 end_freq_khz
<= freq_range
->end_freq_khz
)
714 * freq_in_rule_band - tells us if a frequency is in a frequency band
715 * @freq_range: frequency rule we want to query
716 * @freq_khz: frequency we are inquiring about
718 * This lets us know if a specific frequency rule is or is not relevant to
719 * a specific frequency's band. Bands are device specific and artificial
720 * definitions (the "2.4 GHz band", the "5 GHz band" and the "60GHz band"),
721 * however it is safe for now to assume that a frequency rule should not be
722 * part of a frequency's band if the start freq or end freq are off by more
723 * than 2 GHz for the 2.4 and 5 GHz bands, and by more than 10 GHz for the
725 * This resolution can be lowered and should be considered as we add
726 * regulatory rule support for other "bands".
728 static bool freq_in_rule_band(const struct ieee80211_freq_range
*freq_range
,
731 #define ONE_GHZ_IN_KHZ 1000000
733 * From 802.11ad: directional multi-gigabit (DMG):
734 * Pertaining to operation in a frequency band containing a channel
735 * with the Channel starting frequency above 45 GHz.
737 u32 limit
= freq_khz
> 45 * ONE_GHZ_IN_KHZ
?
738 10 * ONE_GHZ_IN_KHZ
: 2 * ONE_GHZ_IN_KHZ
;
739 if (abs(freq_khz
- freq_range
->start_freq_khz
) <= limit
)
741 if (abs(freq_khz
- freq_range
->end_freq_khz
) <= limit
)
744 #undef ONE_GHZ_IN_KHZ
748 * Later on we can perhaps use the more restrictive DFS
749 * region but we don't have information for that yet so
750 * for now simply disallow conflicts.
752 static enum nl80211_dfs_regions
753 reg_intersect_dfs_region(const enum nl80211_dfs_regions dfs_region1
,
754 const enum nl80211_dfs_regions dfs_region2
)
756 if (dfs_region1
!= dfs_region2
)
757 return NL80211_DFS_UNSET
;
762 * Helper for regdom_intersect(), this does the real
763 * mathematical intersection fun
765 static int reg_rules_intersect(const struct ieee80211_regdomain
*rd1
,
766 const struct ieee80211_regdomain
*rd2
,
767 const struct ieee80211_reg_rule
*rule1
,
768 const struct ieee80211_reg_rule
*rule2
,
769 struct ieee80211_reg_rule
*intersected_rule
)
771 const struct ieee80211_freq_range
*freq_range1
, *freq_range2
;
772 struct ieee80211_freq_range
*freq_range
;
773 const struct ieee80211_power_rule
*power_rule1
, *power_rule2
;
774 struct ieee80211_power_rule
*power_rule
;
775 u32 freq_diff
, max_bandwidth1
, max_bandwidth2
;
777 freq_range1
= &rule1
->freq_range
;
778 freq_range2
= &rule2
->freq_range
;
779 freq_range
= &intersected_rule
->freq_range
;
781 power_rule1
= &rule1
->power_rule
;
782 power_rule2
= &rule2
->power_rule
;
783 power_rule
= &intersected_rule
->power_rule
;
785 freq_range
->start_freq_khz
= max(freq_range1
->start_freq_khz
,
786 freq_range2
->start_freq_khz
);
787 freq_range
->end_freq_khz
= min(freq_range1
->end_freq_khz
,
788 freq_range2
->end_freq_khz
);
790 max_bandwidth1
= freq_range1
->max_bandwidth_khz
;
791 max_bandwidth2
= freq_range2
->max_bandwidth_khz
;
793 if (rule1
->flags
& NL80211_RRF_AUTO_BW
)
794 max_bandwidth1
= reg_get_max_bandwidth(rd1
, rule1
);
795 if (rule2
->flags
& NL80211_RRF_AUTO_BW
)
796 max_bandwidth2
= reg_get_max_bandwidth(rd2
, rule2
);
798 freq_range
->max_bandwidth_khz
= min(max_bandwidth1
, max_bandwidth2
);
800 intersected_rule
->flags
= rule1
->flags
| rule2
->flags
;
803 * In case NL80211_RRF_AUTO_BW requested for both rules
804 * set AUTO_BW in intersected rule also. Next we will
805 * calculate BW correctly in handle_channel function.
806 * In other case remove AUTO_BW flag while we calculate
807 * maximum bandwidth correctly and auto calculation is
810 if ((rule1
->flags
& NL80211_RRF_AUTO_BW
) &&
811 (rule2
->flags
& NL80211_RRF_AUTO_BW
))
812 intersected_rule
->flags
|= NL80211_RRF_AUTO_BW
;
814 intersected_rule
->flags
&= ~NL80211_RRF_AUTO_BW
;
816 freq_diff
= freq_range
->end_freq_khz
- freq_range
->start_freq_khz
;
817 if (freq_range
->max_bandwidth_khz
> freq_diff
)
818 freq_range
->max_bandwidth_khz
= freq_diff
;
820 power_rule
->max_eirp
= min(power_rule1
->max_eirp
,
821 power_rule2
->max_eirp
);
822 power_rule
->max_antenna_gain
= min(power_rule1
->max_antenna_gain
,
823 power_rule2
->max_antenna_gain
);
825 intersected_rule
->dfs_cac_ms
= max(rule1
->dfs_cac_ms
,
828 if (!is_valid_reg_rule(intersected_rule
))
834 /* check whether old rule contains new rule */
835 static bool rule_contains(struct ieee80211_reg_rule
*r1
,
836 struct ieee80211_reg_rule
*r2
)
838 /* for simplicity, currently consider only same flags */
839 if (r1
->flags
!= r2
->flags
)
842 /* verify r1 is more restrictive */
843 if ((r1
->power_rule
.max_antenna_gain
>
844 r2
->power_rule
.max_antenna_gain
) ||
845 r1
->power_rule
.max_eirp
> r2
->power_rule
.max_eirp
)
848 /* make sure r2's range is contained within r1 */
849 if (r1
->freq_range
.start_freq_khz
> r2
->freq_range
.start_freq_khz
||
850 r1
->freq_range
.end_freq_khz
< r2
->freq_range
.end_freq_khz
)
853 /* and finally verify that r1.max_bw >= r2.max_bw */
854 if (r1
->freq_range
.max_bandwidth_khz
<
855 r2
->freq_range
.max_bandwidth_khz
)
861 /* add or extend current rules. do nothing if rule is already contained */
862 static void add_rule(struct ieee80211_reg_rule
*rule
,
863 struct ieee80211_reg_rule
*reg_rules
, u32
*n_rules
)
865 struct ieee80211_reg_rule
*tmp_rule
;
868 for (i
= 0; i
< *n_rules
; i
++) {
869 tmp_rule
= ®_rules
[i
];
870 /* rule is already contained - do nothing */
871 if (rule_contains(tmp_rule
, rule
))
874 /* extend rule if possible */
875 if (rule_contains(rule
, tmp_rule
)) {
876 memcpy(tmp_rule
, rule
, sizeof(*rule
));
881 memcpy(®_rules
[*n_rules
], rule
, sizeof(*rule
));
886 * regdom_intersect - do the intersection between two regulatory domains
887 * @rd1: first regulatory domain
888 * @rd2: second regulatory domain
890 * Use this function to get the intersection between two regulatory domains.
891 * Once completed we will mark the alpha2 for the rd as intersected, "98",
892 * as no one single alpha2 can represent this regulatory domain.
894 * Returns a pointer to the regulatory domain structure which will hold the
895 * resulting intersection of rules between rd1 and rd2. We will
896 * kzalloc() this structure for you.
898 static struct ieee80211_regdomain
*
899 regdom_intersect(const struct ieee80211_regdomain
*rd1
,
900 const struct ieee80211_regdomain
*rd2
)
904 unsigned int num_rules
= 0;
905 const struct ieee80211_reg_rule
*rule1
, *rule2
;
906 struct ieee80211_reg_rule intersected_rule
;
907 struct ieee80211_regdomain
*rd
;
913 * First we get a count of the rules we'll need, then we actually
914 * build them. This is to so we can malloc() and free() a
915 * regdomain once. The reason we use reg_rules_intersect() here
916 * is it will return -EINVAL if the rule computed makes no sense.
917 * All rules that do check out OK are valid.
920 for (x
= 0; x
< rd1
->n_reg_rules
; x
++) {
921 rule1
= &rd1
->reg_rules
[x
];
922 for (y
= 0; y
< rd2
->n_reg_rules
; y
++) {
923 rule2
= &rd2
->reg_rules
[y
];
924 if (!reg_rules_intersect(rd1
, rd2
, rule1
, rule2
,
933 size_of_regd
= sizeof(struct ieee80211_regdomain
) +
934 num_rules
* sizeof(struct ieee80211_reg_rule
);
936 rd
= kzalloc(size_of_regd
, GFP_KERNEL
);
940 for (x
= 0; x
< rd1
->n_reg_rules
; x
++) {
941 rule1
= &rd1
->reg_rules
[x
];
942 for (y
= 0; y
< rd2
->n_reg_rules
; y
++) {
943 rule2
= &rd2
->reg_rules
[y
];
944 r
= reg_rules_intersect(rd1
, rd2
, rule1
, rule2
,
947 * No need to memset here the intersected rule here as
948 * we're not using the stack anymore
953 add_rule(&intersected_rule
, rd
->reg_rules
,
960 rd
->dfs_region
= reg_intersect_dfs_region(rd1
->dfs_region
,
967 * XXX: add support for the rest of enum nl80211_reg_rule_flags, we may
968 * want to just have the channel structure use these
970 static u32
map_regdom_flags(u32 rd_flags
)
972 u32 channel_flags
= 0;
973 if (rd_flags
& NL80211_RRF_NO_IR_ALL
)
974 channel_flags
|= IEEE80211_CHAN_NO_IR
;
975 if (rd_flags
& NL80211_RRF_DFS
)
976 channel_flags
|= IEEE80211_CHAN_RADAR
;
977 if (rd_flags
& NL80211_RRF_NO_OFDM
)
978 channel_flags
|= IEEE80211_CHAN_NO_OFDM
;
979 if (rd_flags
& NL80211_RRF_NO_OUTDOOR
)
980 channel_flags
|= IEEE80211_CHAN_INDOOR_ONLY
;
981 if (rd_flags
& NL80211_RRF_GO_CONCURRENT
)
982 channel_flags
|= IEEE80211_CHAN_GO_CONCURRENT
;
983 if (rd_flags
& NL80211_RRF_NO_HT40MINUS
)
984 channel_flags
|= IEEE80211_CHAN_NO_HT40MINUS
;
985 if (rd_flags
& NL80211_RRF_NO_HT40PLUS
)
986 channel_flags
|= IEEE80211_CHAN_NO_HT40PLUS
;
987 if (rd_flags
& NL80211_RRF_NO_80MHZ
)
988 channel_flags
|= IEEE80211_CHAN_NO_80MHZ
;
989 if (rd_flags
& NL80211_RRF_NO_160MHZ
)
990 channel_flags
|= IEEE80211_CHAN_NO_160MHZ
;
991 return channel_flags
;
994 static const struct ieee80211_reg_rule
*
995 freq_reg_info_regd(struct wiphy
*wiphy
, u32 center_freq
,
996 const struct ieee80211_regdomain
*regd
)
999 bool band_rule_found
= false;
1000 bool bw_fits
= false;
1003 return ERR_PTR(-EINVAL
);
1005 for (i
= 0; i
< regd
->n_reg_rules
; i
++) {
1006 const struct ieee80211_reg_rule
*rr
;
1007 const struct ieee80211_freq_range
*fr
= NULL
;
1009 rr
= ®d
->reg_rules
[i
];
1010 fr
= &rr
->freq_range
;
1013 * We only need to know if one frequency rule was
1014 * was in center_freq's band, that's enough, so lets
1015 * not overwrite it once found
1017 if (!band_rule_found
)
1018 band_rule_found
= freq_in_rule_band(fr
, center_freq
);
1020 bw_fits
= reg_does_bw_fit(fr
, center_freq
, MHZ_TO_KHZ(20));
1022 if (band_rule_found
&& bw_fits
)
1026 if (!band_rule_found
)
1027 return ERR_PTR(-ERANGE
);
1029 return ERR_PTR(-EINVAL
);
1032 const struct ieee80211_reg_rule
*freq_reg_info(struct wiphy
*wiphy
,
1035 const struct ieee80211_regdomain
*regd
;
1037 regd
= reg_get_regdomain(wiphy
);
1039 return freq_reg_info_regd(wiphy
, center_freq
, regd
);
1041 EXPORT_SYMBOL(freq_reg_info
);
1043 const char *reg_initiator_name(enum nl80211_reg_initiator initiator
)
1045 switch (initiator
) {
1046 case NL80211_REGDOM_SET_BY_CORE
:
1048 case NL80211_REGDOM_SET_BY_USER
:
1050 case NL80211_REGDOM_SET_BY_DRIVER
:
1052 case NL80211_REGDOM_SET_BY_COUNTRY_IE
:
1053 return "country IE";
1059 EXPORT_SYMBOL(reg_initiator_name
);
1061 #ifdef CONFIG_CFG80211_REG_DEBUG
1062 static void chan_reg_rule_print_dbg(const struct ieee80211_regdomain
*regd
,
1063 struct ieee80211_channel
*chan
,
1064 const struct ieee80211_reg_rule
*reg_rule
)
1066 const struct ieee80211_power_rule
*power_rule
;
1067 const struct ieee80211_freq_range
*freq_range
;
1068 char max_antenna_gain
[32], bw
[32];
1070 power_rule
= ®_rule
->power_rule
;
1071 freq_range
= ®_rule
->freq_range
;
1073 if (!power_rule
->max_antenna_gain
)
1074 snprintf(max_antenna_gain
, sizeof(max_antenna_gain
), "N/A");
1076 snprintf(max_antenna_gain
, sizeof(max_antenna_gain
), "%d",
1077 power_rule
->max_antenna_gain
);
1079 if (reg_rule
->flags
& NL80211_RRF_AUTO_BW
)
1080 snprintf(bw
, sizeof(bw
), "%d KHz, %d KHz AUTO",
1081 freq_range
->max_bandwidth_khz
,
1082 reg_get_max_bandwidth(regd
, reg_rule
));
1084 snprintf(bw
, sizeof(bw
), "%d KHz",
1085 freq_range
->max_bandwidth_khz
);
1087 REG_DBG_PRINT("Updating information on frequency %d MHz with regulatory rule:\n",
1090 REG_DBG_PRINT("%d KHz - %d KHz @ %s), (%s mBi, %d mBm)\n",
1091 freq_range
->start_freq_khz
, freq_range
->end_freq_khz
,
1092 bw
, max_antenna_gain
,
1093 power_rule
->max_eirp
);
1096 static void chan_reg_rule_print_dbg(const struct ieee80211_regdomain
*regd
,
1097 struct ieee80211_channel
*chan
,
1098 const struct ieee80211_reg_rule
*reg_rule
)
1105 * Note that right now we assume the desired channel bandwidth
1106 * is always 20 MHz for each individual channel (HT40 uses 20 MHz
1107 * per channel, the primary and the extension channel).
1109 static void handle_channel(struct wiphy
*wiphy
,
1110 enum nl80211_reg_initiator initiator
,
1111 struct ieee80211_channel
*chan
)
1113 u32 flags
, bw_flags
= 0;
1114 const struct ieee80211_reg_rule
*reg_rule
= NULL
;
1115 const struct ieee80211_power_rule
*power_rule
= NULL
;
1116 const struct ieee80211_freq_range
*freq_range
= NULL
;
1117 struct wiphy
*request_wiphy
= NULL
;
1118 struct regulatory_request
*lr
= get_last_request();
1119 const struct ieee80211_regdomain
*regd
;
1120 u32 max_bandwidth_khz
;
1122 request_wiphy
= wiphy_idx_to_wiphy(lr
->wiphy_idx
);
1124 flags
= chan
->orig_flags
;
1126 reg_rule
= freq_reg_info(wiphy
, MHZ_TO_KHZ(chan
->center_freq
));
1127 if (IS_ERR(reg_rule
)) {
1129 * We will disable all channels that do not match our
1130 * received regulatory rule unless the hint is coming
1131 * from a Country IE and the Country IE had no information
1132 * about a band. The IEEE 802.11 spec allows for an AP
1133 * to send only a subset of the regulatory rules allowed,
1134 * so an AP in the US that only supports 2.4 GHz may only send
1135 * a country IE with information for the 2.4 GHz band
1136 * while 5 GHz is still supported.
1138 if (initiator
== NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
1139 PTR_ERR(reg_rule
) == -ERANGE
)
1142 if (lr
->initiator
== NL80211_REGDOM_SET_BY_DRIVER
&&
1143 request_wiphy
&& request_wiphy
== wiphy
&&
1144 request_wiphy
->regulatory_flags
& REGULATORY_STRICT_REG
) {
1145 REG_DBG_PRINT("Disabling freq %d MHz for good\n",
1147 chan
->orig_flags
|= IEEE80211_CHAN_DISABLED
;
1148 chan
->flags
= chan
->orig_flags
;
1150 REG_DBG_PRINT("Disabling freq %d MHz\n",
1152 chan
->flags
|= IEEE80211_CHAN_DISABLED
;
1157 regd
= reg_get_regdomain(wiphy
);
1158 chan_reg_rule_print_dbg(regd
, chan
, reg_rule
);
1160 power_rule
= ®_rule
->power_rule
;
1161 freq_range
= ®_rule
->freq_range
;
1163 max_bandwidth_khz
= freq_range
->max_bandwidth_khz
;
1164 /* Check if auto calculation requested */
1165 if (reg_rule
->flags
& NL80211_RRF_AUTO_BW
)
1166 max_bandwidth_khz
= reg_get_max_bandwidth(regd
, reg_rule
);
1168 if (max_bandwidth_khz
< MHZ_TO_KHZ(40))
1169 bw_flags
= IEEE80211_CHAN_NO_HT40
;
1170 if (max_bandwidth_khz
< MHZ_TO_KHZ(80))
1171 bw_flags
|= IEEE80211_CHAN_NO_80MHZ
;
1172 if (max_bandwidth_khz
< MHZ_TO_KHZ(160))
1173 bw_flags
|= IEEE80211_CHAN_NO_160MHZ
;
1175 if (lr
->initiator
== NL80211_REGDOM_SET_BY_DRIVER
&&
1176 request_wiphy
&& request_wiphy
== wiphy
&&
1177 request_wiphy
->regulatory_flags
& REGULATORY_STRICT_REG
) {
1179 * This guarantees the driver's requested regulatory domain
1180 * will always be used as a base for further regulatory
1183 chan
->flags
= chan
->orig_flags
=
1184 map_regdom_flags(reg_rule
->flags
) | bw_flags
;
1185 chan
->max_antenna_gain
= chan
->orig_mag
=
1186 (int) MBI_TO_DBI(power_rule
->max_antenna_gain
);
1187 chan
->max_reg_power
= chan
->max_power
= chan
->orig_mpwr
=
1188 (int) MBM_TO_DBM(power_rule
->max_eirp
);
1190 if (chan
->flags
& IEEE80211_CHAN_RADAR
) {
1191 chan
->dfs_cac_ms
= IEEE80211_DFS_MIN_CAC_TIME_MS
;
1192 if (reg_rule
->dfs_cac_ms
)
1193 chan
->dfs_cac_ms
= reg_rule
->dfs_cac_ms
;
1199 chan
->dfs_state
= NL80211_DFS_USABLE
;
1200 chan
->dfs_state_entered
= jiffies
;
1202 chan
->beacon_found
= false;
1203 chan
->flags
= flags
| bw_flags
| map_regdom_flags(reg_rule
->flags
);
1204 chan
->max_antenna_gain
=
1205 min_t(int, chan
->orig_mag
,
1206 MBI_TO_DBI(power_rule
->max_antenna_gain
));
1207 chan
->max_reg_power
= (int) MBM_TO_DBM(power_rule
->max_eirp
);
1209 if (chan
->flags
& IEEE80211_CHAN_RADAR
) {
1210 if (reg_rule
->dfs_cac_ms
)
1211 chan
->dfs_cac_ms
= reg_rule
->dfs_cac_ms
;
1213 chan
->dfs_cac_ms
= IEEE80211_DFS_MIN_CAC_TIME_MS
;
1216 if (chan
->orig_mpwr
) {
1218 * Devices that use REGULATORY_COUNTRY_IE_FOLLOW_POWER
1219 * will always follow the passed country IE power settings.
1221 if (initiator
== NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
1222 wiphy
->regulatory_flags
& REGULATORY_COUNTRY_IE_FOLLOW_POWER
)
1223 chan
->max_power
= chan
->max_reg_power
;
1225 chan
->max_power
= min(chan
->orig_mpwr
,
1226 chan
->max_reg_power
);
1228 chan
->max_power
= chan
->max_reg_power
;
1231 static void handle_band(struct wiphy
*wiphy
,
1232 enum nl80211_reg_initiator initiator
,
1233 struct ieee80211_supported_band
*sband
)
1240 for (i
= 0; i
< sband
->n_channels
; i
++)
1241 handle_channel(wiphy
, initiator
, &sband
->channels
[i
]);
1244 static bool reg_request_cell_base(struct regulatory_request
*request
)
1246 if (request
->initiator
!= NL80211_REGDOM_SET_BY_USER
)
1248 return request
->user_reg_hint_type
== NL80211_USER_REG_HINT_CELL_BASE
;
1251 static bool reg_request_indoor(struct regulatory_request
*request
)
1253 if (request
->initiator
!= NL80211_REGDOM_SET_BY_USER
)
1255 return request
->user_reg_hint_type
== NL80211_USER_REG_HINT_INDOOR
;
1258 bool reg_last_request_cell_base(void)
1260 return reg_request_cell_base(get_last_request());
1263 #ifdef CONFIG_CFG80211_REG_CELLULAR_HINTS
1264 /* Core specific check */
1265 static enum reg_request_treatment
1266 reg_ignore_cell_hint(struct regulatory_request
*pending_request
)
1268 struct regulatory_request
*lr
= get_last_request();
1270 if (!reg_num_devs_support_basehint
)
1271 return REG_REQ_IGNORE
;
1273 if (reg_request_cell_base(lr
) &&
1274 !regdom_changes(pending_request
->alpha2
))
1275 return REG_REQ_ALREADY_SET
;
1280 /* Device specific check */
1281 static bool reg_dev_ignore_cell_hint(struct wiphy
*wiphy
)
1283 return !(wiphy
->features
& NL80211_FEATURE_CELL_BASE_REG_HINTS
);
1286 static int reg_ignore_cell_hint(struct regulatory_request
*pending_request
)
1288 return REG_REQ_IGNORE
;
1291 static bool reg_dev_ignore_cell_hint(struct wiphy
*wiphy
)
1297 static bool wiphy_strict_alpha2_regd(struct wiphy
*wiphy
)
1299 if (wiphy
->regulatory_flags
& REGULATORY_STRICT_REG
&&
1300 !(wiphy
->regulatory_flags
& REGULATORY_CUSTOM_REG
))
1305 static bool ignore_reg_update(struct wiphy
*wiphy
,
1306 enum nl80211_reg_initiator initiator
)
1308 struct regulatory_request
*lr
= get_last_request();
1310 if (wiphy
->regulatory_flags
& REGULATORY_WIPHY_SELF_MANAGED
)
1314 REG_DBG_PRINT("Ignoring regulatory request set by %s "
1315 "since last_request is not set\n",
1316 reg_initiator_name(initiator
));
1320 if (initiator
== NL80211_REGDOM_SET_BY_CORE
&&
1321 wiphy
->regulatory_flags
& REGULATORY_CUSTOM_REG
) {
1322 REG_DBG_PRINT("Ignoring regulatory request set by %s "
1323 "since the driver uses its own custom "
1324 "regulatory domain\n",
1325 reg_initiator_name(initiator
));
1330 * wiphy->regd will be set once the device has its own
1331 * desired regulatory domain set
1333 if (wiphy_strict_alpha2_regd(wiphy
) && !wiphy
->regd
&&
1334 initiator
!= NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
1335 !is_world_regdom(lr
->alpha2
)) {
1336 REG_DBG_PRINT("Ignoring regulatory request set by %s "
1337 "since the driver requires its own regulatory "
1338 "domain to be set first\n",
1339 reg_initiator_name(initiator
));
1343 if (reg_request_cell_base(lr
))
1344 return reg_dev_ignore_cell_hint(wiphy
);
1349 static bool reg_is_world_roaming(struct wiphy
*wiphy
)
1351 const struct ieee80211_regdomain
*cr
= get_cfg80211_regdom();
1352 const struct ieee80211_regdomain
*wr
= get_wiphy_regdom(wiphy
);
1353 struct regulatory_request
*lr
= get_last_request();
1355 if (is_world_regdom(cr
->alpha2
) || (wr
&& is_world_regdom(wr
->alpha2
)))
1358 if (lr
&& lr
->initiator
!= NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
1359 wiphy
->regulatory_flags
& REGULATORY_CUSTOM_REG
)
1365 static void handle_reg_beacon(struct wiphy
*wiphy
, unsigned int chan_idx
,
1366 struct reg_beacon
*reg_beacon
)
1368 struct ieee80211_supported_band
*sband
;
1369 struct ieee80211_channel
*chan
;
1370 bool channel_changed
= false;
1371 struct ieee80211_channel chan_before
;
1373 sband
= wiphy
->bands
[reg_beacon
->chan
.band
];
1374 chan
= &sband
->channels
[chan_idx
];
1376 if (likely(chan
->center_freq
!= reg_beacon
->chan
.center_freq
))
1379 if (chan
->beacon_found
)
1382 chan
->beacon_found
= true;
1384 if (!reg_is_world_roaming(wiphy
))
1387 if (wiphy
->regulatory_flags
& REGULATORY_DISABLE_BEACON_HINTS
)
1390 chan_before
.center_freq
= chan
->center_freq
;
1391 chan_before
.flags
= chan
->flags
;
1393 if (chan
->flags
& IEEE80211_CHAN_NO_IR
) {
1394 chan
->flags
&= ~IEEE80211_CHAN_NO_IR
;
1395 channel_changed
= true;
1398 if (channel_changed
)
1399 nl80211_send_beacon_hint_event(wiphy
, &chan_before
, chan
);
1403 * Called when a scan on a wiphy finds a beacon on
1406 static void wiphy_update_new_beacon(struct wiphy
*wiphy
,
1407 struct reg_beacon
*reg_beacon
)
1410 struct ieee80211_supported_band
*sband
;
1412 if (!wiphy
->bands
[reg_beacon
->chan
.band
])
1415 sband
= wiphy
->bands
[reg_beacon
->chan
.band
];
1417 for (i
= 0; i
< sband
->n_channels
; i
++)
1418 handle_reg_beacon(wiphy
, i
, reg_beacon
);
1422 * Called upon reg changes or a new wiphy is added
1424 static void wiphy_update_beacon_reg(struct wiphy
*wiphy
)
1427 struct ieee80211_supported_band
*sband
;
1428 struct reg_beacon
*reg_beacon
;
1430 list_for_each_entry(reg_beacon
, ®_beacon_list
, list
) {
1431 if (!wiphy
->bands
[reg_beacon
->chan
.band
])
1433 sband
= wiphy
->bands
[reg_beacon
->chan
.band
];
1434 for (i
= 0; i
< sband
->n_channels
; i
++)
1435 handle_reg_beacon(wiphy
, i
, reg_beacon
);
1439 /* Reap the advantages of previously found beacons */
1440 static void reg_process_beacons(struct wiphy
*wiphy
)
1443 * Means we are just firing up cfg80211, so no beacons would
1444 * have been processed yet.
1448 wiphy_update_beacon_reg(wiphy
);
1451 static bool is_ht40_allowed(struct ieee80211_channel
*chan
)
1455 if (chan
->flags
& IEEE80211_CHAN_DISABLED
)
1457 /* This would happen when regulatory rules disallow HT40 completely */
1458 if ((chan
->flags
& IEEE80211_CHAN_NO_HT40
) == IEEE80211_CHAN_NO_HT40
)
1463 static void reg_process_ht_flags_channel(struct wiphy
*wiphy
,
1464 struct ieee80211_channel
*channel
)
1466 struct ieee80211_supported_band
*sband
= wiphy
->bands
[channel
->band
];
1467 struct ieee80211_channel
*channel_before
= NULL
, *channel_after
= NULL
;
1470 if (!is_ht40_allowed(channel
)) {
1471 channel
->flags
|= IEEE80211_CHAN_NO_HT40
;
1476 * We need to ensure the extension channels exist to
1477 * be able to use HT40- or HT40+, this finds them (or not)
1479 for (i
= 0; i
< sband
->n_channels
; i
++) {
1480 struct ieee80211_channel
*c
= &sband
->channels
[i
];
1482 if (c
->center_freq
== (channel
->center_freq
- 20))
1484 if (c
->center_freq
== (channel
->center_freq
+ 20))
1489 * Please note that this assumes target bandwidth is 20 MHz,
1490 * if that ever changes we also need to change the below logic
1491 * to include that as well.
1493 if (!is_ht40_allowed(channel_before
))
1494 channel
->flags
|= IEEE80211_CHAN_NO_HT40MINUS
;
1496 channel
->flags
&= ~IEEE80211_CHAN_NO_HT40MINUS
;
1498 if (!is_ht40_allowed(channel_after
))
1499 channel
->flags
|= IEEE80211_CHAN_NO_HT40PLUS
;
1501 channel
->flags
&= ~IEEE80211_CHAN_NO_HT40PLUS
;
1504 static void reg_process_ht_flags_band(struct wiphy
*wiphy
,
1505 struct ieee80211_supported_band
*sband
)
1512 for (i
= 0; i
< sband
->n_channels
; i
++)
1513 reg_process_ht_flags_channel(wiphy
, &sband
->channels
[i
]);
1516 static void reg_process_ht_flags(struct wiphy
*wiphy
)
1518 enum ieee80211_band band
;
1523 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++)
1524 reg_process_ht_flags_band(wiphy
, wiphy
->bands
[band
]);
1527 static void reg_call_notifier(struct wiphy
*wiphy
,
1528 struct regulatory_request
*request
)
1530 if (wiphy
->reg_notifier
)
1531 wiphy
->reg_notifier(wiphy
, request
);
1534 static bool reg_wdev_chan_valid(struct wiphy
*wiphy
, struct wireless_dev
*wdev
)
1536 struct ieee80211_channel
*ch
;
1537 struct cfg80211_chan_def chandef
;
1538 struct cfg80211_registered_device
*rdev
= wiphy_to_rdev(wiphy
);
1543 if (!wdev
->netdev
|| !netif_running(wdev
->netdev
))
1546 switch (wdev
->iftype
) {
1547 case NL80211_IFTYPE_AP
:
1548 case NL80211_IFTYPE_P2P_GO
:
1549 if (!wdev
->beacon_interval
)
1552 ret
= cfg80211_reg_can_beacon(wiphy
,
1553 &wdev
->chandef
, wdev
->iftype
);
1555 case NL80211_IFTYPE_STATION
:
1556 case NL80211_IFTYPE_P2P_CLIENT
:
1557 case NL80211_IFTYPE_ADHOC
:
1558 if (!wdev
->current_bss
||
1559 !wdev
->current_bss
->pub
.channel
)
1562 ch
= wdev
->current_bss
->pub
.channel
;
1563 if (rdev
->ops
->get_channel
&&
1564 !rdev_get_channel(rdev
, wdev
, &chandef
))
1565 ret
= cfg80211_chandef_usable(wiphy
, &chandef
,
1566 IEEE80211_CHAN_DISABLED
);
1568 ret
= !(ch
->flags
& IEEE80211_CHAN_DISABLED
);
1570 case NL80211_IFTYPE_MONITOR
:
1571 case NL80211_IFTYPE_AP_VLAN
:
1572 case NL80211_IFTYPE_P2P_DEVICE
:
1573 /* no enforcement required */
1576 /* others not implemented for now */
1586 static void reg_leave_invalid_chans(struct wiphy
*wiphy
)
1588 struct wireless_dev
*wdev
;
1589 struct cfg80211_registered_device
*rdev
= wiphy_to_rdev(wiphy
);
1593 list_for_each_entry(wdev
, &rdev
->wdev_list
, list
)
1594 if (!reg_wdev_chan_valid(wiphy
, wdev
))
1595 cfg80211_leave(rdev
, wdev
);
1598 static void reg_check_chans_work(struct work_struct
*work
)
1600 struct cfg80211_registered_device
*rdev
;
1602 REG_DBG_PRINT("Verifying active interfaces after reg change\n");
1605 list_for_each_entry(rdev
, &cfg80211_rdev_list
, list
)
1606 if (!(rdev
->wiphy
.regulatory_flags
&
1607 REGULATORY_IGNORE_STALE_KICKOFF
))
1608 reg_leave_invalid_chans(&rdev
->wiphy
);
1613 static void reg_check_channels(void)
1616 * Give usermode a chance to do something nicer (move to another
1617 * channel, orderly disconnection), before forcing a disconnection.
1619 mod_delayed_work(system_power_efficient_wq
,
1621 msecs_to_jiffies(REG_ENFORCE_GRACE_MS
));
1624 static void wiphy_update_regulatory(struct wiphy
*wiphy
,
1625 enum nl80211_reg_initiator initiator
)
1627 enum ieee80211_band band
;
1628 struct regulatory_request
*lr
= get_last_request();
1630 if (ignore_reg_update(wiphy
, initiator
)) {
1632 * Regulatory updates set by CORE are ignored for custom
1633 * regulatory cards. Let us notify the changes to the driver,
1634 * as some drivers used this to restore its orig_* reg domain.
1636 if (initiator
== NL80211_REGDOM_SET_BY_CORE
&&
1637 wiphy
->regulatory_flags
& REGULATORY_CUSTOM_REG
)
1638 reg_call_notifier(wiphy
, lr
);
1642 lr
->dfs_region
= get_cfg80211_regdom()->dfs_region
;
1644 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++)
1645 handle_band(wiphy
, initiator
, wiphy
->bands
[band
]);
1647 reg_process_beacons(wiphy
);
1648 reg_process_ht_flags(wiphy
);
1649 reg_call_notifier(wiphy
, lr
);
1652 static void update_all_wiphy_regulatory(enum nl80211_reg_initiator initiator
)
1654 struct cfg80211_registered_device
*rdev
;
1655 struct wiphy
*wiphy
;
1659 list_for_each_entry(rdev
, &cfg80211_rdev_list
, list
) {
1660 wiphy
= &rdev
->wiphy
;
1661 wiphy_update_regulatory(wiphy
, initiator
);
1664 reg_check_channels();
1667 static void handle_channel_custom(struct wiphy
*wiphy
,
1668 struct ieee80211_channel
*chan
,
1669 const struct ieee80211_regdomain
*regd
)
1672 const struct ieee80211_reg_rule
*reg_rule
= NULL
;
1673 const struct ieee80211_power_rule
*power_rule
= NULL
;
1674 const struct ieee80211_freq_range
*freq_range
= NULL
;
1675 u32 max_bandwidth_khz
;
1677 reg_rule
= freq_reg_info_regd(wiphy
, MHZ_TO_KHZ(chan
->center_freq
),
1680 if (IS_ERR(reg_rule
)) {
1681 REG_DBG_PRINT("Disabling freq %d MHz as custom regd has no rule that fits it\n",
1683 chan
->orig_flags
|= IEEE80211_CHAN_DISABLED
;
1684 chan
->flags
= chan
->orig_flags
;
1688 chan_reg_rule_print_dbg(regd
, chan
, reg_rule
);
1690 power_rule
= ®_rule
->power_rule
;
1691 freq_range
= ®_rule
->freq_range
;
1693 max_bandwidth_khz
= freq_range
->max_bandwidth_khz
;
1694 /* Check if auto calculation requested */
1695 if (reg_rule
->flags
& NL80211_RRF_AUTO_BW
)
1696 max_bandwidth_khz
= reg_get_max_bandwidth(regd
, reg_rule
);
1698 if (max_bandwidth_khz
< MHZ_TO_KHZ(40))
1699 bw_flags
= IEEE80211_CHAN_NO_HT40
;
1700 if (max_bandwidth_khz
< MHZ_TO_KHZ(80))
1701 bw_flags
|= IEEE80211_CHAN_NO_80MHZ
;
1702 if (max_bandwidth_khz
< MHZ_TO_KHZ(160))
1703 bw_flags
|= IEEE80211_CHAN_NO_160MHZ
;
1705 chan
->dfs_state_entered
= jiffies
;
1706 chan
->dfs_state
= NL80211_DFS_USABLE
;
1708 chan
->beacon_found
= false;
1709 chan
->flags
|= map_regdom_flags(reg_rule
->flags
) | bw_flags
;
1710 chan
->max_antenna_gain
= (int) MBI_TO_DBI(power_rule
->max_antenna_gain
);
1711 chan
->max_reg_power
= chan
->max_power
=
1712 (int) MBM_TO_DBM(power_rule
->max_eirp
);
1714 if (chan
->flags
& IEEE80211_CHAN_RADAR
) {
1715 if (reg_rule
->dfs_cac_ms
)
1716 chan
->dfs_cac_ms
= reg_rule
->dfs_cac_ms
;
1718 chan
->dfs_cac_ms
= IEEE80211_DFS_MIN_CAC_TIME_MS
;
1721 chan
->max_power
= chan
->max_reg_power
;
1724 static void handle_band_custom(struct wiphy
*wiphy
,
1725 struct ieee80211_supported_band
*sband
,
1726 const struct ieee80211_regdomain
*regd
)
1733 for (i
= 0; i
< sband
->n_channels
; i
++)
1734 handle_channel_custom(wiphy
, &sband
->channels
[i
], regd
);
1737 /* Used by drivers prior to wiphy registration */
1738 void wiphy_apply_custom_regulatory(struct wiphy
*wiphy
,
1739 const struct ieee80211_regdomain
*regd
)
1741 enum ieee80211_band band
;
1742 unsigned int bands_set
= 0;
1744 WARN(!(wiphy
->regulatory_flags
& REGULATORY_CUSTOM_REG
),
1745 "wiphy should have REGULATORY_CUSTOM_REG\n");
1746 wiphy
->regulatory_flags
|= REGULATORY_CUSTOM_REG
;
1748 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++) {
1749 if (!wiphy
->bands
[band
])
1751 handle_band_custom(wiphy
, wiphy
->bands
[band
], regd
);
1756 * no point in calling this if it won't have any effect
1757 * on your device's supported bands.
1759 WARN_ON(!bands_set
);
1761 EXPORT_SYMBOL(wiphy_apply_custom_regulatory
);
1763 static void reg_set_request_processed(void)
1765 bool need_more_processing
= false;
1766 struct regulatory_request
*lr
= get_last_request();
1768 lr
->processed
= true;
1770 spin_lock(®_requests_lock
);
1771 if (!list_empty(®_requests_list
))
1772 need_more_processing
= true;
1773 spin_unlock(®_requests_lock
);
1775 if (lr
->initiator
== NL80211_REGDOM_SET_BY_USER
)
1776 cancel_delayed_work(®_timeout
);
1778 if (need_more_processing
)
1779 schedule_work(®_work
);
1783 * reg_process_hint_core - process core regulatory requests
1784 * @pending_request: a pending core regulatory request
1786 * The wireless subsystem can use this function to process
1787 * a regulatory request issued by the regulatory core.
1789 * Returns one of the different reg request treatment values.
1791 static enum reg_request_treatment
1792 reg_process_hint_core(struct regulatory_request
*core_request
)
1795 core_request
->intersect
= false;
1796 core_request
->processed
= false;
1798 reg_update_last_request(core_request
);
1800 return reg_call_crda(core_request
);
1803 static enum reg_request_treatment
1804 __reg_process_hint_user(struct regulatory_request
*user_request
)
1806 struct regulatory_request
*lr
= get_last_request();
1808 if (reg_request_indoor(user_request
)) {
1809 reg_is_indoor
= true;
1810 return REG_REQ_USER_HINT_HANDLED
;
1813 if (reg_request_cell_base(user_request
))
1814 return reg_ignore_cell_hint(user_request
);
1816 if (reg_request_cell_base(lr
))
1817 return REG_REQ_IGNORE
;
1819 if (lr
->initiator
== NL80211_REGDOM_SET_BY_COUNTRY_IE
)
1820 return REG_REQ_INTERSECT
;
1822 * If the user knows better the user should set the regdom
1823 * to their country before the IE is picked up
1825 if (lr
->initiator
== NL80211_REGDOM_SET_BY_USER
&&
1827 return REG_REQ_IGNORE
;
1829 * Process user requests only after previous user/driver/core
1830 * requests have been processed
1832 if ((lr
->initiator
== NL80211_REGDOM_SET_BY_CORE
||
1833 lr
->initiator
== NL80211_REGDOM_SET_BY_DRIVER
||
1834 lr
->initiator
== NL80211_REGDOM_SET_BY_USER
) &&
1835 regdom_changes(lr
->alpha2
))
1836 return REG_REQ_IGNORE
;
1838 if (!regdom_changes(user_request
->alpha2
))
1839 return REG_REQ_ALREADY_SET
;
1845 * reg_process_hint_user - process user regulatory requests
1846 * @user_request: a pending user regulatory request
1848 * The wireless subsystem can use this function to process
1849 * a regulatory request initiated by userspace.
1851 * Returns one of the different reg request treatment values.
1853 static enum reg_request_treatment
1854 reg_process_hint_user(struct regulatory_request
*user_request
)
1856 enum reg_request_treatment treatment
;
1858 treatment
= __reg_process_hint_user(user_request
);
1859 if (treatment
== REG_REQ_IGNORE
||
1860 treatment
== REG_REQ_ALREADY_SET
||
1861 treatment
== REG_REQ_USER_HINT_HANDLED
) {
1862 reg_free_request(user_request
);
1866 user_request
->intersect
= treatment
== REG_REQ_INTERSECT
;
1867 user_request
->processed
= false;
1869 reg_update_last_request(user_request
);
1871 user_alpha2
[0] = user_request
->alpha2
[0];
1872 user_alpha2
[1] = user_request
->alpha2
[1];
1874 return reg_call_crda(user_request
);
1877 static enum reg_request_treatment
1878 __reg_process_hint_driver(struct regulatory_request
*driver_request
)
1880 struct regulatory_request
*lr
= get_last_request();
1882 if (lr
->initiator
== NL80211_REGDOM_SET_BY_CORE
) {
1883 if (regdom_changes(driver_request
->alpha2
))
1885 return REG_REQ_ALREADY_SET
;
1889 * This would happen if you unplug and plug your card
1890 * back in or if you add a new device for which the previously
1891 * loaded card also agrees on the regulatory domain.
1893 if (lr
->initiator
== NL80211_REGDOM_SET_BY_DRIVER
&&
1894 !regdom_changes(driver_request
->alpha2
))
1895 return REG_REQ_ALREADY_SET
;
1897 return REG_REQ_INTERSECT
;
1901 * reg_process_hint_driver - process driver regulatory requests
1902 * @driver_request: a pending driver regulatory request
1904 * The wireless subsystem can use this function to process
1905 * a regulatory request issued by an 802.11 driver.
1907 * Returns one of the different reg request treatment values.
1909 static enum reg_request_treatment
1910 reg_process_hint_driver(struct wiphy
*wiphy
,
1911 struct regulatory_request
*driver_request
)
1913 const struct ieee80211_regdomain
*regd
;
1914 enum reg_request_treatment treatment
;
1916 treatment
= __reg_process_hint_driver(driver_request
);
1918 switch (treatment
) {
1921 case REG_REQ_IGNORE
:
1922 case REG_REQ_USER_HINT_HANDLED
:
1923 reg_free_request(driver_request
);
1925 case REG_REQ_INTERSECT
:
1927 case REG_REQ_ALREADY_SET
:
1928 regd
= reg_copy_regd(get_cfg80211_regdom());
1930 reg_free_request(driver_request
);
1931 return REG_REQ_IGNORE
;
1933 rcu_assign_pointer(wiphy
->regd
, regd
);
1937 driver_request
->intersect
= treatment
== REG_REQ_INTERSECT
;
1938 driver_request
->processed
= false;
1940 reg_update_last_request(driver_request
);
1943 * Since CRDA will not be called in this case as we already
1944 * have applied the requested regulatory domain before we just
1945 * inform userspace we have processed the request
1947 if (treatment
== REG_REQ_ALREADY_SET
) {
1948 nl80211_send_reg_change_event(driver_request
);
1949 reg_set_request_processed();
1953 return reg_call_crda(driver_request
);
1956 static enum reg_request_treatment
1957 __reg_process_hint_country_ie(struct wiphy
*wiphy
,
1958 struct regulatory_request
*country_ie_request
)
1960 struct wiphy
*last_wiphy
= NULL
;
1961 struct regulatory_request
*lr
= get_last_request();
1963 if (reg_request_cell_base(lr
)) {
1964 /* Trust a Cell base station over the AP's country IE */
1965 if (regdom_changes(country_ie_request
->alpha2
))
1966 return REG_REQ_IGNORE
;
1967 return REG_REQ_ALREADY_SET
;
1969 if (wiphy
->regulatory_flags
& REGULATORY_COUNTRY_IE_IGNORE
)
1970 return REG_REQ_IGNORE
;
1973 if (unlikely(!is_an_alpha2(country_ie_request
->alpha2
)))
1976 if (lr
->initiator
!= NL80211_REGDOM_SET_BY_COUNTRY_IE
)
1979 last_wiphy
= wiphy_idx_to_wiphy(lr
->wiphy_idx
);
1981 if (last_wiphy
!= wiphy
) {
1983 * Two cards with two APs claiming different
1984 * Country IE alpha2s. We could
1985 * intersect them, but that seems unlikely
1986 * to be correct. Reject second one for now.
1988 if (regdom_changes(country_ie_request
->alpha2
))
1989 return REG_REQ_IGNORE
;
1990 return REG_REQ_ALREADY_SET
;
1993 * Two consecutive Country IE hints on the same wiphy.
1994 * This should be picked up early by the driver/stack
1996 if (WARN_ON(regdom_changes(country_ie_request
->alpha2
)))
1998 return REG_REQ_ALREADY_SET
;
2002 * reg_process_hint_country_ie - process regulatory requests from country IEs
2003 * @country_ie_request: a regulatory request from a country IE
2005 * The wireless subsystem can use this function to process
2006 * a regulatory request issued by a country Information Element.
2008 * Returns one of the different reg request treatment values.
2010 static enum reg_request_treatment
2011 reg_process_hint_country_ie(struct wiphy
*wiphy
,
2012 struct regulatory_request
*country_ie_request
)
2014 enum reg_request_treatment treatment
;
2016 treatment
= __reg_process_hint_country_ie(wiphy
, country_ie_request
);
2018 switch (treatment
) {
2021 case REG_REQ_IGNORE
:
2022 case REG_REQ_USER_HINT_HANDLED
:
2024 case REG_REQ_ALREADY_SET
:
2025 reg_free_request(country_ie_request
);
2027 case REG_REQ_INTERSECT
:
2028 reg_free_request(country_ie_request
);
2030 * This doesn't happen yet, not sure we
2031 * ever want to support it for this case.
2033 WARN_ONCE(1, "Unexpected intersection for country IEs");
2034 return REG_REQ_IGNORE
;
2037 country_ie_request
->intersect
= false;
2038 country_ie_request
->processed
= false;
2040 reg_update_last_request(country_ie_request
);
2042 return reg_call_crda(country_ie_request
);
2045 /* This processes *all* regulatory hints */
2046 static void reg_process_hint(struct regulatory_request
*reg_request
)
2048 struct wiphy
*wiphy
= NULL
;
2049 enum reg_request_treatment treatment
;
2051 if (reg_request
->wiphy_idx
!= WIPHY_IDX_INVALID
)
2052 wiphy
= wiphy_idx_to_wiphy(reg_request
->wiphy_idx
);
2054 switch (reg_request
->initiator
) {
2055 case NL80211_REGDOM_SET_BY_CORE
:
2056 reg_process_hint_core(reg_request
);
2058 case NL80211_REGDOM_SET_BY_USER
:
2059 treatment
= reg_process_hint_user(reg_request
);
2060 if (treatment
== REG_REQ_IGNORE
||
2061 treatment
== REG_REQ_ALREADY_SET
||
2062 treatment
== REG_REQ_USER_HINT_HANDLED
)
2064 queue_delayed_work(system_power_efficient_wq
,
2065 ®_timeout
, msecs_to_jiffies(3142));
2067 case NL80211_REGDOM_SET_BY_DRIVER
:
2070 treatment
= reg_process_hint_driver(wiphy
, reg_request
);
2072 case NL80211_REGDOM_SET_BY_COUNTRY_IE
:
2075 treatment
= reg_process_hint_country_ie(wiphy
, reg_request
);
2078 WARN(1, "invalid initiator %d\n", reg_request
->initiator
);
2082 /* This is required so that the orig_* parameters are saved */
2083 if (treatment
== REG_REQ_ALREADY_SET
&& wiphy
&&
2084 wiphy
->regulatory_flags
& REGULATORY_STRICT_REG
) {
2085 wiphy_update_regulatory(wiphy
, reg_request
->initiator
);
2086 reg_check_channels();
2092 reg_free_request(reg_request
);
2096 * Processes regulatory hints, this is all the NL80211_REGDOM_SET_BY_*
2097 * Regulatory hints come on a first come first serve basis and we
2098 * must process each one atomically.
2100 static void reg_process_pending_hints(void)
2102 struct regulatory_request
*reg_request
, *lr
;
2104 lr
= get_last_request();
2106 /* When last_request->processed becomes true this will be rescheduled */
2107 if (lr
&& !lr
->processed
) {
2108 reg_process_hint(lr
);
2112 spin_lock(®_requests_lock
);
2114 if (list_empty(®_requests_list
)) {
2115 spin_unlock(®_requests_lock
);
2119 reg_request
= list_first_entry(®_requests_list
,
2120 struct regulatory_request
,
2122 list_del_init(®_request
->list
);
2124 spin_unlock(®_requests_lock
);
2126 reg_process_hint(reg_request
);
2129 /* Processes beacon hints -- this has nothing to do with country IEs */
2130 static void reg_process_pending_beacon_hints(void)
2132 struct cfg80211_registered_device
*rdev
;
2133 struct reg_beacon
*pending_beacon
, *tmp
;
2135 /* This goes through the _pending_ beacon list */
2136 spin_lock_bh(®_pending_beacons_lock
);
2138 list_for_each_entry_safe(pending_beacon
, tmp
,
2139 ®_pending_beacons
, list
) {
2140 list_del_init(&pending_beacon
->list
);
2142 /* Applies the beacon hint to current wiphys */
2143 list_for_each_entry(rdev
, &cfg80211_rdev_list
, list
)
2144 wiphy_update_new_beacon(&rdev
->wiphy
, pending_beacon
);
2146 /* Remembers the beacon hint for new wiphys or reg changes */
2147 list_add_tail(&pending_beacon
->list
, ®_beacon_list
);
2150 spin_unlock_bh(®_pending_beacons_lock
);
2153 static void reg_process_self_managed_hints(void)
2155 struct cfg80211_registered_device
*rdev
;
2156 struct wiphy
*wiphy
;
2157 const struct ieee80211_regdomain
*tmp
;
2158 const struct ieee80211_regdomain
*regd
;
2159 enum ieee80211_band band
;
2160 struct regulatory_request request
= {};
2162 list_for_each_entry(rdev
, &cfg80211_rdev_list
, list
) {
2163 wiphy
= &rdev
->wiphy
;
2165 spin_lock(®_requests_lock
);
2166 regd
= rdev
->requested_regd
;
2167 rdev
->requested_regd
= NULL
;
2168 spin_unlock(®_requests_lock
);
2173 tmp
= get_wiphy_regdom(wiphy
);
2174 rcu_assign_pointer(wiphy
->regd
, regd
);
2175 rcu_free_regdom(tmp
);
2177 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++)
2178 handle_band_custom(wiphy
, wiphy
->bands
[band
], regd
);
2180 reg_process_ht_flags(wiphy
);
2182 request
.wiphy_idx
= get_wiphy_idx(wiphy
);
2183 request
.alpha2
[0] = regd
->alpha2
[0];
2184 request
.alpha2
[1] = regd
->alpha2
[1];
2185 request
.initiator
= NL80211_REGDOM_SET_BY_DRIVER
;
2187 nl80211_send_wiphy_reg_change_event(&request
);
2190 reg_check_channels();
2193 static void reg_todo(struct work_struct
*work
)
2196 reg_process_pending_hints();
2197 reg_process_pending_beacon_hints();
2198 reg_process_self_managed_hints();
2202 static void queue_regulatory_request(struct regulatory_request
*request
)
2204 request
->alpha2
[0] = toupper(request
->alpha2
[0]);
2205 request
->alpha2
[1] = toupper(request
->alpha2
[1]);
2207 spin_lock(®_requests_lock
);
2208 list_add_tail(&request
->list
, ®_requests_list
);
2209 spin_unlock(®_requests_lock
);
2211 schedule_work(®_work
);
2215 * Core regulatory hint -- happens during cfg80211_init()
2216 * and when we restore regulatory settings.
2218 static int regulatory_hint_core(const char *alpha2
)
2220 struct regulatory_request
*request
;
2222 request
= kzalloc(sizeof(struct regulatory_request
), GFP_KERNEL
);
2226 request
->alpha2
[0] = alpha2
[0];
2227 request
->alpha2
[1] = alpha2
[1];
2228 request
->initiator
= NL80211_REGDOM_SET_BY_CORE
;
2230 queue_regulatory_request(request
);
2236 int regulatory_hint_user(const char *alpha2
,
2237 enum nl80211_user_reg_hint_type user_reg_hint_type
)
2239 struct regulatory_request
*request
;
2241 if (WARN_ON(!alpha2
))
2244 request
= kzalloc(sizeof(struct regulatory_request
), GFP_KERNEL
);
2248 request
->wiphy_idx
= WIPHY_IDX_INVALID
;
2249 request
->alpha2
[0] = alpha2
[0];
2250 request
->alpha2
[1] = alpha2
[1];
2251 request
->initiator
= NL80211_REGDOM_SET_BY_USER
;
2252 request
->user_reg_hint_type
= user_reg_hint_type
;
2254 queue_regulatory_request(request
);
2259 int regulatory_hint_indoor_user(void)
2261 struct regulatory_request
*request
;
2263 request
= kzalloc(sizeof(struct regulatory_request
), GFP_KERNEL
);
2267 request
->wiphy_idx
= WIPHY_IDX_INVALID
;
2268 request
->initiator
= NL80211_REGDOM_SET_BY_USER
;
2269 request
->user_reg_hint_type
= NL80211_USER_REG_HINT_INDOOR
;
2270 queue_regulatory_request(request
);
2276 int regulatory_hint(struct wiphy
*wiphy
, const char *alpha2
)
2278 struct regulatory_request
*request
;
2280 if (WARN_ON(!alpha2
|| !wiphy
))
2283 wiphy
->regulatory_flags
&= ~REGULATORY_CUSTOM_REG
;
2285 request
= kzalloc(sizeof(struct regulatory_request
), GFP_KERNEL
);
2289 request
->wiphy_idx
= get_wiphy_idx(wiphy
);
2291 request
->alpha2
[0] = alpha2
[0];
2292 request
->alpha2
[1] = alpha2
[1];
2293 request
->initiator
= NL80211_REGDOM_SET_BY_DRIVER
;
2295 queue_regulatory_request(request
);
2299 EXPORT_SYMBOL(regulatory_hint
);
2301 void regulatory_hint_country_ie(struct wiphy
*wiphy
, enum ieee80211_band band
,
2302 const u8
*country_ie
, u8 country_ie_len
)
2305 enum environment_cap env
= ENVIRON_ANY
;
2306 struct regulatory_request
*request
= NULL
, *lr
;
2308 /* IE len must be evenly divisible by 2 */
2309 if (country_ie_len
& 0x01)
2312 if (country_ie_len
< IEEE80211_COUNTRY_IE_MIN_LEN
)
2315 request
= kzalloc(sizeof(*request
), GFP_KERNEL
);
2319 alpha2
[0] = country_ie
[0];
2320 alpha2
[1] = country_ie
[1];
2322 if (country_ie
[2] == 'I')
2323 env
= ENVIRON_INDOOR
;
2324 else if (country_ie
[2] == 'O')
2325 env
= ENVIRON_OUTDOOR
;
2328 lr
= get_last_request();
2334 * We will run this only upon a successful connection on cfg80211.
2335 * We leave conflict resolution to the workqueue, where can hold
2338 if (lr
->initiator
== NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
2339 lr
->wiphy_idx
!= WIPHY_IDX_INVALID
)
2342 request
->wiphy_idx
= get_wiphy_idx(wiphy
);
2343 request
->alpha2
[0] = alpha2
[0];
2344 request
->alpha2
[1] = alpha2
[1];
2345 request
->initiator
= NL80211_REGDOM_SET_BY_COUNTRY_IE
;
2346 request
->country_ie_env
= env
;
2348 queue_regulatory_request(request
);
2355 static void restore_alpha2(char *alpha2
, bool reset_user
)
2357 /* indicates there is no alpha2 to consider for restoration */
2361 /* The user setting has precedence over the module parameter */
2362 if (is_user_regdom_saved()) {
2363 /* Unless we're asked to ignore it and reset it */
2365 REG_DBG_PRINT("Restoring regulatory settings including user preference\n");
2366 user_alpha2
[0] = '9';
2367 user_alpha2
[1] = '7';
2370 * If we're ignoring user settings, we still need to
2371 * check the module parameter to ensure we put things
2372 * back as they were for a full restore.
2374 if (!is_world_regdom(ieee80211_regdom
)) {
2375 REG_DBG_PRINT("Keeping preference on module parameter ieee80211_regdom: %c%c\n",
2376 ieee80211_regdom
[0], ieee80211_regdom
[1]);
2377 alpha2
[0] = ieee80211_regdom
[0];
2378 alpha2
[1] = ieee80211_regdom
[1];
2381 REG_DBG_PRINT("Restoring regulatory settings while preserving user preference for: %c%c\n",
2382 user_alpha2
[0], user_alpha2
[1]);
2383 alpha2
[0] = user_alpha2
[0];
2384 alpha2
[1] = user_alpha2
[1];
2386 } else if (!is_world_regdom(ieee80211_regdom
)) {
2387 REG_DBG_PRINT("Keeping preference on module parameter ieee80211_regdom: %c%c\n",
2388 ieee80211_regdom
[0], ieee80211_regdom
[1]);
2389 alpha2
[0] = ieee80211_regdom
[0];
2390 alpha2
[1] = ieee80211_regdom
[1];
2392 REG_DBG_PRINT("Restoring regulatory settings\n");
2395 static void restore_custom_reg_settings(struct wiphy
*wiphy
)
2397 struct ieee80211_supported_band
*sband
;
2398 enum ieee80211_band band
;
2399 struct ieee80211_channel
*chan
;
2402 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++) {
2403 sband
= wiphy
->bands
[band
];
2406 for (i
= 0; i
< sband
->n_channels
; i
++) {
2407 chan
= &sband
->channels
[i
];
2408 chan
->flags
= chan
->orig_flags
;
2409 chan
->max_antenna_gain
= chan
->orig_mag
;
2410 chan
->max_power
= chan
->orig_mpwr
;
2411 chan
->beacon_found
= false;
2417 * Restoring regulatory settings involves ingoring any
2418 * possibly stale country IE information and user regulatory
2419 * settings if so desired, this includes any beacon hints
2420 * learned as we could have traveled outside to another country
2421 * after disconnection. To restore regulatory settings we do
2422 * exactly what we did at bootup:
2424 * - send a core regulatory hint
2425 * - send a user regulatory hint if applicable
2427 * Device drivers that send a regulatory hint for a specific country
2428 * keep their own regulatory domain on wiphy->regd so that does does
2429 * not need to be remembered.
2431 static void restore_regulatory_settings(bool reset_user
)
2434 char world_alpha2
[2];
2435 struct reg_beacon
*reg_beacon
, *btmp
;
2436 struct regulatory_request
*reg_request
, *tmp
;
2437 LIST_HEAD(tmp_reg_req_list
);
2438 struct cfg80211_registered_device
*rdev
;
2442 reg_is_indoor
= false;
2444 reset_regdomains(true, &world_regdom
);
2445 restore_alpha2(alpha2
, reset_user
);
2448 * If there's any pending requests we simply
2449 * stash them to a temporary pending queue and
2450 * add then after we've restored regulatory
2453 spin_lock(®_requests_lock
);
2454 list_for_each_entry_safe(reg_request
, tmp
, ®_requests_list
, list
) {
2455 if (reg_request
->initiator
!= NL80211_REGDOM_SET_BY_USER
)
2457 list_move_tail(®_request
->list
, &tmp_reg_req_list
);
2459 spin_unlock(®_requests_lock
);
2461 /* Clear beacon hints */
2462 spin_lock_bh(®_pending_beacons_lock
);
2463 list_for_each_entry_safe(reg_beacon
, btmp
, ®_pending_beacons
, list
) {
2464 list_del(®_beacon
->list
);
2467 spin_unlock_bh(®_pending_beacons_lock
);
2469 list_for_each_entry_safe(reg_beacon
, btmp
, ®_beacon_list
, list
) {
2470 list_del(®_beacon
->list
);
2474 /* First restore to the basic regulatory settings */
2475 world_alpha2
[0] = cfg80211_world_regdom
->alpha2
[0];
2476 world_alpha2
[1] = cfg80211_world_regdom
->alpha2
[1];
2478 list_for_each_entry(rdev
, &cfg80211_rdev_list
, list
) {
2479 if (rdev
->wiphy
.regulatory_flags
& REGULATORY_WIPHY_SELF_MANAGED
)
2481 if (rdev
->wiphy
.regulatory_flags
& REGULATORY_CUSTOM_REG
)
2482 restore_custom_reg_settings(&rdev
->wiphy
);
2485 regulatory_hint_core(world_alpha2
);
2488 * This restores the ieee80211_regdom module parameter
2489 * preference or the last user requested regulatory
2490 * settings, user regulatory settings takes precedence.
2492 if (is_an_alpha2(alpha2
))
2493 regulatory_hint_user(user_alpha2
, NL80211_USER_REG_HINT_USER
);
2495 spin_lock(®_requests_lock
);
2496 list_splice_tail_init(&tmp_reg_req_list
, ®_requests_list
);
2497 spin_unlock(®_requests_lock
);
2499 REG_DBG_PRINT("Kicking the queue\n");
2501 schedule_work(®_work
);
2504 void regulatory_hint_disconnect(void)
2506 REG_DBG_PRINT("All devices are disconnected, going to restore regulatory settings\n");
2507 restore_regulatory_settings(false);
2510 static bool freq_is_chan_12_13_14(u16 freq
)
2512 if (freq
== ieee80211_channel_to_frequency(12, IEEE80211_BAND_2GHZ
) ||
2513 freq
== ieee80211_channel_to_frequency(13, IEEE80211_BAND_2GHZ
) ||
2514 freq
== ieee80211_channel_to_frequency(14, IEEE80211_BAND_2GHZ
))
2519 static bool pending_reg_beacon(struct ieee80211_channel
*beacon_chan
)
2521 struct reg_beacon
*pending_beacon
;
2523 list_for_each_entry(pending_beacon
, ®_pending_beacons
, list
)
2524 if (beacon_chan
->center_freq
==
2525 pending_beacon
->chan
.center_freq
)
2530 int regulatory_hint_found_beacon(struct wiphy
*wiphy
,
2531 struct ieee80211_channel
*beacon_chan
,
2534 struct reg_beacon
*reg_beacon
;
2537 if (beacon_chan
->beacon_found
||
2538 beacon_chan
->flags
& IEEE80211_CHAN_RADAR
||
2539 (beacon_chan
->band
== IEEE80211_BAND_2GHZ
&&
2540 !freq_is_chan_12_13_14(beacon_chan
->center_freq
)))
2543 spin_lock_bh(®_pending_beacons_lock
);
2544 processing
= pending_reg_beacon(beacon_chan
);
2545 spin_unlock_bh(®_pending_beacons_lock
);
2550 reg_beacon
= kzalloc(sizeof(struct reg_beacon
), gfp
);
2554 REG_DBG_PRINT("Found new beacon on frequency: %d MHz (Ch %d) on %s\n",
2555 beacon_chan
->center_freq
,
2556 ieee80211_frequency_to_channel(beacon_chan
->center_freq
),
2559 memcpy(®_beacon
->chan
, beacon_chan
,
2560 sizeof(struct ieee80211_channel
));
2563 * Since we can be called from BH or and non-BH context
2564 * we must use spin_lock_bh()
2566 spin_lock_bh(®_pending_beacons_lock
);
2567 list_add_tail(®_beacon
->list
, ®_pending_beacons
);
2568 spin_unlock_bh(®_pending_beacons_lock
);
2570 schedule_work(®_work
);
2575 static void print_rd_rules(const struct ieee80211_regdomain
*rd
)
2578 const struct ieee80211_reg_rule
*reg_rule
= NULL
;
2579 const struct ieee80211_freq_range
*freq_range
= NULL
;
2580 const struct ieee80211_power_rule
*power_rule
= NULL
;
2581 char bw
[32], cac_time
[32];
2583 pr_info(" (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp), (dfs_cac_time)\n");
2585 for (i
= 0; i
< rd
->n_reg_rules
; i
++) {
2586 reg_rule
= &rd
->reg_rules
[i
];
2587 freq_range
= ®_rule
->freq_range
;
2588 power_rule
= ®_rule
->power_rule
;
2590 if (reg_rule
->flags
& NL80211_RRF_AUTO_BW
)
2591 snprintf(bw
, sizeof(bw
), "%d KHz, %d KHz AUTO",
2592 freq_range
->max_bandwidth_khz
,
2593 reg_get_max_bandwidth(rd
, reg_rule
));
2595 snprintf(bw
, sizeof(bw
), "%d KHz",
2596 freq_range
->max_bandwidth_khz
);
2598 if (reg_rule
->flags
& NL80211_RRF_DFS
)
2599 scnprintf(cac_time
, sizeof(cac_time
), "%u s",
2600 reg_rule
->dfs_cac_ms
/1000);
2602 scnprintf(cac_time
, sizeof(cac_time
), "N/A");
2606 * There may not be documentation for max antenna gain
2607 * in certain regions
2609 if (power_rule
->max_antenna_gain
)
2610 pr_info(" (%d KHz - %d KHz @ %s), (%d mBi, %d mBm), (%s)\n",
2611 freq_range
->start_freq_khz
,
2612 freq_range
->end_freq_khz
,
2614 power_rule
->max_antenna_gain
,
2615 power_rule
->max_eirp
,
2618 pr_info(" (%d KHz - %d KHz @ %s), (N/A, %d mBm), (%s)\n",
2619 freq_range
->start_freq_khz
,
2620 freq_range
->end_freq_khz
,
2622 power_rule
->max_eirp
,
2627 bool reg_supported_dfs_region(enum nl80211_dfs_regions dfs_region
)
2629 switch (dfs_region
) {
2630 case NL80211_DFS_UNSET
:
2631 case NL80211_DFS_FCC
:
2632 case NL80211_DFS_ETSI
:
2633 case NL80211_DFS_JP
:
2636 REG_DBG_PRINT("Ignoring uknown DFS master region: %d\n",
2642 static void print_regdomain(const struct ieee80211_regdomain
*rd
)
2644 struct regulatory_request
*lr
= get_last_request();
2646 if (is_intersected_alpha2(rd
->alpha2
)) {
2647 if (lr
->initiator
== NL80211_REGDOM_SET_BY_COUNTRY_IE
) {
2648 struct cfg80211_registered_device
*rdev
;
2649 rdev
= cfg80211_rdev_by_wiphy_idx(lr
->wiphy_idx
);
2651 pr_info("Current regulatory domain updated by AP to: %c%c\n",
2652 rdev
->country_ie_alpha2
[0],
2653 rdev
->country_ie_alpha2
[1]);
2655 pr_info("Current regulatory domain intersected:\n");
2657 pr_info("Current regulatory domain intersected:\n");
2658 } else if (is_world_regdom(rd
->alpha2
)) {
2659 pr_info("World regulatory domain updated:\n");
2661 if (is_unknown_alpha2(rd
->alpha2
))
2662 pr_info("Regulatory domain changed to driver built-in settings (unknown country)\n");
2664 if (reg_request_cell_base(lr
))
2665 pr_info("Regulatory domain changed to country: %c%c by Cell Station\n",
2666 rd
->alpha2
[0], rd
->alpha2
[1]);
2668 pr_info("Regulatory domain changed to country: %c%c\n",
2669 rd
->alpha2
[0], rd
->alpha2
[1]);
2673 pr_info(" DFS Master region: %s", reg_dfs_region_str(rd
->dfs_region
));
2677 static void print_regdomain_info(const struct ieee80211_regdomain
*rd
)
2679 pr_info("Regulatory domain: %c%c\n", rd
->alpha2
[0], rd
->alpha2
[1]);
2683 static int reg_set_rd_core(const struct ieee80211_regdomain
*rd
)
2685 if (!is_world_regdom(rd
->alpha2
))
2687 update_world_regdomain(rd
);
2691 static int reg_set_rd_user(const struct ieee80211_regdomain
*rd
,
2692 struct regulatory_request
*user_request
)
2694 const struct ieee80211_regdomain
*intersected_rd
= NULL
;
2696 if (!regdom_changes(rd
->alpha2
))
2699 if (!is_valid_rd(rd
)) {
2700 pr_err("Invalid regulatory domain detected:\n");
2701 print_regdomain_info(rd
);
2705 if (!user_request
->intersect
) {
2706 reset_regdomains(false, rd
);
2710 intersected_rd
= regdom_intersect(rd
, get_cfg80211_regdom());
2711 if (!intersected_rd
)
2716 reset_regdomains(false, intersected_rd
);
2721 static int reg_set_rd_driver(const struct ieee80211_regdomain
*rd
,
2722 struct regulatory_request
*driver_request
)
2724 const struct ieee80211_regdomain
*regd
;
2725 const struct ieee80211_regdomain
*intersected_rd
= NULL
;
2726 const struct ieee80211_regdomain
*tmp
;
2727 struct wiphy
*request_wiphy
;
2729 if (is_world_regdom(rd
->alpha2
))
2732 if (!regdom_changes(rd
->alpha2
))
2735 if (!is_valid_rd(rd
)) {
2736 pr_err("Invalid regulatory domain detected:\n");
2737 print_regdomain_info(rd
);
2741 request_wiphy
= wiphy_idx_to_wiphy(driver_request
->wiphy_idx
);
2742 if (!request_wiphy
) {
2743 queue_delayed_work(system_power_efficient_wq
,
2748 if (!driver_request
->intersect
) {
2749 if (request_wiphy
->regd
)
2752 regd
= reg_copy_regd(rd
);
2754 return PTR_ERR(regd
);
2756 rcu_assign_pointer(request_wiphy
->regd
, regd
);
2757 reset_regdomains(false, rd
);
2761 intersected_rd
= regdom_intersect(rd
, get_cfg80211_regdom());
2762 if (!intersected_rd
)
2766 * We can trash what CRDA provided now.
2767 * However if a driver requested this specific regulatory
2768 * domain we keep it for its private use
2770 tmp
= get_wiphy_regdom(request_wiphy
);
2771 rcu_assign_pointer(request_wiphy
->regd
, rd
);
2772 rcu_free_regdom(tmp
);
2776 reset_regdomains(false, intersected_rd
);
2781 static int reg_set_rd_country_ie(const struct ieee80211_regdomain
*rd
,
2782 struct regulatory_request
*country_ie_request
)
2784 struct wiphy
*request_wiphy
;
2786 if (!is_alpha2_set(rd
->alpha2
) && !is_an_alpha2(rd
->alpha2
) &&
2787 !is_unknown_alpha2(rd
->alpha2
))
2791 * Lets only bother proceeding on the same alpha2 if the current
2792 * rd is non static (it means CRDA was present and was used last)
2793 * and the pending request came in from a country IE
2796 if (!is_valid_rd(rd
)) {
2797 pr_err("Invalid regulatory domain detected:\n");
2798 print_regdomain_info(rd
);
2802 request_wiphy
= wiphy_idx_to_wiphy(country_ie_request
->wiphy_idx
);
2803 if (!request_wiphy
) {
2804 queue_delayed_work(system_power_efficient_wq
,
2809 if (country_ie_request
->intersect
)
2812 reset_regdomains(false, rd
);
2817 * Use this call to set the current regulatory domain. Conflicts with
2818 * multiple drivers can be ironed out later. Caller must've already
2819 * kmalloc'd the rd structure.
2821 int set_regdom(const struct ieee80211_regdomain
*rd
)
2823 struct regulatory_request
*lr
;
2824 bool user_reset
= false;
2827 if (!reg_is_valid_request(rd
->alpha2
)) {
2832 lr
= get_last_request();
2834 /* Note that this doesn't update the wiphys, this is done below */
2835 switch (lr
->initiator
) {
2836 case NL80211_REGDOM_SET_BY_CORE
:
2837 r
= reg_set_rd_core(rd
);
2839 case NL80211_REGDOM_SET_BY_USER
:
2840 r
= reg_set_rd_user(rd
, lr
);
2843 case NL80211_REGDOM_SET_BY_DRIVER
:
2844 r
= reg_set_rd_driver(rd
, lr
);
2846 case NL80211_REGDOM_SET_BY_COUNTRY_IE
:
2847 r
= reg_set_rd_country_ie(rd
, lr
);
2850 WARN(1, "invalid initiator %d\n", lr
->initiator
);
2857 reg_set_request_processed();
2860 /* Back to world regulatory in case of errors */
2861 restore_regulatory_settings(user_reset
);
2868 /* This would make this whole thing pointless */
2869 if (WARN_ON(!lr
->intersect
&& rd
!= get_cfg80211_regdom()))
2872 /* update all wiphys now with the new established regulatory domain */
2873 update_all_wiphy_regulatory(lr
->initiator
);
2875 print_regdomain(get_cfg80211_regdom());
2877 nl80211_send_reg_change_event(lr
);
2879 reg_set_request_processed();
2884 int regulatory_set_wiphy_regd(struct wiphy
*wiphy
,
2885 struct ieee80211_regdomain
*rd
)
2887 const struct ieee80211_regdomain
*regd
;
2888 const struct ieee80211_regdomain
*prev_regd
;
2889 struct cfg80211_registered_device
*rdev
;
2891 if (WARN_ON(!wiphy
|| !rd
))
2894 if (WARN(!(wiphy
->regulatory_flags
& REGULATORY_WIPHY_SELF_MANAGED
),
2895 "wiphy should have REGULATORY_WIPHY_SELF_MANAGED\n"))
2898 if (WARN(!is_valid_rd(rd
), "Invalid regulatory domain detected\n")) {
2899 print_regdomain_info(rd
);
2903 regd
= reg_copy_regd(rd
);
2905 return PTR_ERR(regd
);
2907 rdev
= wiphy_to_rdev(wiphy
);
2909 spin_lock(®_requests_lock
);
2910 prev_regd
= rdev
->requested_regd
;
2911 rdev
->requested_regd
= regd
;
2912 spin_unlock(®_requests_lock
);
2916 schedule_work(®_work
);
2919 EXPORT_SYMBOL(regulatory_set_wiphy_regd
);
2921 void wiphy_regulatory_register(struct wiphy
*wiphy
)
2923 struct regulatory_request
*lr
;
2925 /* self-managed devices ignore external hints */
2926 if (wiphy
->regulatory_flags
& REGULATORY_WIPHY_SELF_MANAGED
)
2927 wiphy
->regulatory_flags
|= REGULATORY_DISABLE_BEACON_HINTS
|
2928 REGULATORY_COUNTRY_IE_IGNORE
;
2930 if (!reg_dev_ignore_cell_hint(wiphy
))
2931 reg_num_devs_support_basehint
++;
2933 lr
= get_last_request();
2934 wiphy_update_regulatory(wiphy
, lr
->initiator
);
2937 void wiphy_regulatory_deregister(struct wiphy
*wiphy
)
2939 struct wiphy
*request_wiphy
= NULL
;
2940 struct regulatory_request
*lr
;
2942 lr
= get_last_request();
2944 if (!reg_dev_ignore_cell_hint(wiphy
))
2945 reg_num_devs_support_basehint
--;
2947 rcu_free_regdom(get_wiphy_regdom(wiphy
));
2948 RCU_INIT_POINTER(wiphy
->regd
, NULL
);
2951 request_wiphy
= wiphy_idx_to_wiphy(lr
->wiphy_idx
);
2953 if (!request_wiphy
|| request_wiphy
!= wiphy
)
2956 lr
->wiphy_idx
= WIPHY_IDX_INVALID
;
2957 lr
->country_ie_env
= ENVIRON_ANY
;
2960 static void reg_timeout_work(struct work_struct
*work
)
2962 REG_DBG_PRINT("Timeout while waiting for CRDA to reply, restoring regulatory settings\n");
2964 restore_regulatory_settings(true);
2969 * See http://www.fcc.gov/document/5-ghz-unlicensed-spectrum-unii, for
2970 * UNII band definitions
2972 int cfg80211_get_unii(int freq
)
2975 if (freq
>= 5150 && freq
<= 5250)
2979 if (freq
> 5250 && freq
<= 5350)
2983 if (freq
> 5350 && freq
<= 5470)
2987 if (freq
> 5470 && freq
<= 5725)
2991 if (freq
> 5725 && freq
<= 5825)
2997 bool regulatory_indoor_allowed(void)
2999 return reg_is_indoor
;
3002 int __init
regulatory_init(void)
3006 reg_pdev
= platform_device_register_simple("regulatory", 0, NULL
, 0);
3007 if (IS_ERR(reg_pdev
))
3008 return PTR_ERR(reg_pdev
);
3010 spin_lock_init(®_requests_lock
);
3011 spin_lock_init(®_pending_beacons_lock
);
3013 reg_regdb_size_check();
3015 rcu_assign_pointer(cfg80211_regdomain
, cfg80211_world_regdom
);
3017 user_alpha2
[0] = '9';
3018 user_alpha2
[1] = '7';
3020 /* We always try to get an update for the static regdomain */
3021 err
= regulatory_hint_core(cfg80211_world_regdom
->alpha2
);
3026 * N.B. kobject_uevent_env() can fail mainly for when we're out
3027 * memory which is handled and propagated appropriately above
3028 * but it can also fail during a netlink_broadcast() or during
3029 * early boot for call_usermodehelper(). For now treat these
3030 * errors as non-fatal.
3032 pr_err("kobject_uevent_env() was unable to call CRDA during init\n");
3036 * Finally, if the user set the module parameter treat it
3039 if (!is_world_regdom(ieee80211_regdom
))
3040 regulatory_hint_user(ieee80211_regdom
,
3041 NL80211_USER_REG_HINT_USER
);
3046 void regulatory_exit(void)
3048 struct regulatory_request
*reg_request
, *tmp
;
3049 struct reg_beacon
*reg_beacon
, *btmp
;
3051 cancel_work_sync(®_work
);
3052 cancel_delayed_work_sync(®_timeout
);
3053 cancel_delayed_work_sync(®_check_chans
);
3055 /* Lock to suppress warnings */
3057 reset_regdomains(true, NULL
);
3060 dev_set_uevent_suppress(®_pdev
->dev
, true);
3062 platform_device_unregister(reg_pdev
);
3064 list_for_each_entry_safe(reg_beacon
, btmp
, ®_pending_beacons
, list
) {
3065 list_del(®_beacon
->list
);
3069 list_for_each_entry_safe(reg_beacon
, btmp
, ®_beacon_list
, list
) {
3070 list_del(®_beacon
->list
);
3074 list_for_each_entry_safe(reg_request
, tmp
, ®_requests_list
, list
) {
3075 list_del(®_request
->list
);