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 cfg80211_chan_def chandef
;
1537 struct cfg80211_registered_device
*rdev
= wiphy_to_rdev(wiphy
);
1538 enum nl80211_iftype iftype
;
1541 iftype
= wdev
->iftype
;
1543 /* make sure the interface is active */
1544 if (!wdev
->netdev
|| !netif_running(wdev
->netdev
))
1545 goto wdev_inactive_unlock
;
1548 case NL80211_IFTYPE_AP
:
1549 case NL80211_IFTYPE_P2P_GO
:
1550 if (!wdev
->beacon_interval
)
1551 goto wdev_inactive_unlock
;
1552 chandef
= wdev
->chandef
;
1554 case NL80211_IFTYPE_ADHOC
:
1555 if (!wdev
->ssid_len
)
1556 goto wdev_inactive_unlock
;
1557 chandef
= wdev
->chandef
;
1559 case NL80211_IFTYPE_STATION
:
1560 case NL80211_IFTYPE_P2P_CLIENT
:
1561 if (!wdev
->current_bss
||
1562 !wdev
->current_bss
->pub
.channel
)
1563 goto wdev_inactive_unlock
;
1565 if (!rdev
->ops
->get_channel
||
1566 rdev_get_channel(rdev
, wdev
, &chandef
))
1567 cfg80211_chandef_create(&chandef
,
1568 wdev
->current_bss
->pub
.channel
,
1569 NL80211_CHAN_NO_HT
);
1571 case NL80211_IFTYPE_MONITOR
:
1572 case NL80211_IFTYPE_AP_VLAN
:
1573 case NL80211_IFTYPE_P2P_DEVICE
:
1574 /* no enforcement required */
1577 /* others not implemented for now */
1585 case NL80211_IFTYPE_AP
:
1586 case NL80211_IFTYPE_P2P_GO
:
1587 case NL80211_IFTYPE_ADHOC
:
1588 return cfg80211_reg_can_beacon(wiphy
, &chandef
, iftype
);
1589 case NL80211_IFTYPE_STATION
:
1590 case NL80211_IFTYPE_P2P_CLIENT
:
1591 return cfg80211_chandef_usable(wiphy
, &chandef
,
1592 IEEE80211_CHAN_DISABLED
);
1599 wdev_inactive_unlock
:
1604 static void reg_leave_invalid_chans(struct wiphy
*wiphy
)
1606 struct wireless_dev
*wdev
;
1607 struct cfg80211_registered_device
*rdev
= wiphy_to_rdev(wiphy
);
1611 list_for_each_entry(wdev
, &rdev
->wdev_list
, list
)
1612 if (!reg_wdev_chan_valid(wiphy
, wdev
))
1613 cfg80211_leave(rdev
, wdev
);
1616 static void reg_check_chans_work(struct work_struct
*work
)
1618 struct cfg80211_registered_device
*rdev
;
1620 REG_DBG_PRINT("Verifying active interfaces after reg change\n");
1623 list_for_each_entry(rdev
, &cfg80211_rdev_list
, list
)
1624 if (!(rdev
->wiphy
.regulatory_flags
&
1625 REGULATORY_IGNORE_STALE_KICKOFF
))
1626 reg_leave_invalid_chans(&rdev
->wiphy
);
1631 static void reg_check_channels(void)
1634 * Give usermode a chance to do something nicer (move to another
1635 * channel, orderly disconnection), before forcing a disconnection.
1637 mod_delayed_work(system_power_efficient_wq
,
1639 msecs_to_jiffies(REG_ENFORCE_GRACE_MS
));
1642 static void wiphy_update_regulatory(struct wiphy
*wiphy
,
1643 enum nl80211_reg_initiator initiator
)
1645 enum ieee80211_band band
;
1646 struct regulatory_request
*lr
= get_last_request();
1648 if (ignore_reg_update(wiphy
, initiator
)) {
1650 * Regulatory updates set by CORE are ignored for custom
1651 * regulatory cards. Let us notify the changes to the driver,
1652 * as some drivers used this to restore its orig_* reg domain.
1654 if (initiator
== NL80211_REGDOM_SET_BY_CORE
&&
1655 wiphy
->regulatory_flags
& REGULATORY_CUSTOM_REG
)
1656 reg_call_notifier(wiphy
, lr
);
1660 lr
->dfs_region
= get_cfg80211_regdom()->dfs_region
;
1662 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++)
1663 handle_band(wiphy
, initiator
, wiphy
->bands
[band
]);
1665 reg_process_beacons(wiphy
);
1666 reg_process_ht_flags(wiphy
);
1667 reg_call_notifier(wiphy
, lr
);
1670 static void update_all_wiphy_regulatory(enum nl80211_reg_initiator initiator
)
1672 struct cfg80211_registered_device
*rdev
;
1673 struct wiphy
*wiphy
;
1677 list_for_each_entry(rdev
, &cfg80211_rdev_list
, list
) {
1678 wiphy
= &rdev
->wiphy
;
1679 wiphy_update_regulatory(wiphy
, initiator
);
1682 reg_check_channels();
1685 static void handle_channel_custom(struct wiphy
*wiphy
,
1686 struct ieee80211_channel
*chan
,
1687 const struct ieee80211_regdomain
*regd
)
1690 const struct ieee80211_reg_rule
*reg_rule
= NULL
;
1691 const struct ieee80211_power_rule
*power_rule
= NULL
;
1692 const struct ieee80211_freq_range
*freq_range
= NULL
;
1693 u32 max_bandwidth_khz
;
1695 reg_rule
= freq_reg_info_regd(wiphy
, MHZ_TO_KHZ(chan
->center_freq
),
1698 if (IS_ERR(reg_rule
)) {
1699 REG_DBG_PRINT("Disabling freq %d MHz as custom regd has no rule that fits it\n",
1701 if (wiphy
->regulatory_flags
& REGULATORY_WIPHY_SELF_MANAGED
) {
1702 chan
->flags
|= IEEE80211_CHAN_DISABLED
;
1704 chan
->orig_flags
|= IEEE80211_CHAN_DISABLED
;
1705 chan
->flags
= chan
->orig_flags
;
1710 chan_reg_rule_print_dbg(regd
, chan
, reg_rule
);
1712 power_rule
= ®_rule
->power_rule
;
1713 freq_range
= ®_rule
->freq_range
;
1715 max_bandwidth_khz
= freq_range
->max_bandwidth_khz
;
1716 /* Check if auto calculation requested */
1717 if (reg_rule
->flags
& NL80211_RRF_AUTO_BW
)
1718 max_bandwidth_khz
= reg_get_max_bandwidth(regd
, reg_rule
);
1720 if (max_bandwidth_khz
< MHZ_TO_KHZ(40))
1721 bw_flags
= IEEE80211_CHAN_NO_HT40
;
1722 if (max_bandwidth_khz
< MHZ_TO_KHZ(80))
1723 bw_flags
|= IEEE80211_CHAN_NO_80MHZ
;
1724 if (max_bandwidth_khz
< MHZ_TO_KHZ(160))
1725 bw_flags
|= IEEE80211_CHAN_NO_160MHZ
;
1727 chan
->dfs_state_entered
= jiffies
;
1728 chan
->dfs_state
= NL80211_DFS_USABLE
;
1730 chan
->beacon_found
= false;
1732 if (wiphy
->regulatory_flags
& REGULATORY_WIPHY_SELF_MANAGED
)
1733 chan
->flags
= chan
->orig_flags
| bw_flags
|
1734 map_regdom_flags(reg_rule
->flags
);
1736 chan
->flags
|= map_regdom_flags(reg_rule
->flags
) | bw_flags
;
1738 chan
->max_antenna_gain
= (int) MBI_TO_DBI(power_rule
->max_antenna_gain
);
1739 chan
->max_reg_power
= chan
->max_power
=
1740 (int) MBM_TO_DBM(power_rule
->max_eirp
);
1742 if (chan
->flags
& IEEE80211_CHAN_RADAR
) {
1743 if (reg_rule
->dfs_cac_ms
)
1744 chan
->dfs_cac_ms
= reg_rule
->dfs_cac_ms
;
1746 chan
->dfs_cac_ms
= IEEE80211_DFS_MIN_CAC_TIME_MS
;
1749 chan
->max_power
= chan
->max_reg_power
;
1752 static void handle_band_custom(struct wiphy
*wiphy
,
1753 struct ieee80211_supported_band
*sband
,
1754 const struct ieee80211_regdomain
*regd
)
1761 for (i
= 0; i
< sband
->n_channels
; i
++)
1762 handle_channel_custom(wiphy
, &sband
->channels
[i
], regd
);
1765 /* Used by drivers prior to wiphy registration */
1766 void wiphy_apply_custom_regulatory(struct wiphy
*wiphy
,
1767 const struct ieee80211_regdomain
*regd
)
1769 enum ieee80211_band band
;
1770 unsigned int bands_set
= 0;
1772 WARN(!(wiphy
->regulatory_flags
& REGULATORY_CUSTOM_REG
),
1773 "wiphy should have REGULATORY_CUSTOM_REG\n");
1774 wiphy
->regulatory_flags
|= REGULATORY_CUSTOM_REG
;
1776 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++) {
1777 if (!wiphy
->bands
[band
])
1779 handle_band_custom(wiphy
, wiphy
->bands
[band
], regd
);
1784 * no point in calling this if it won't have any effect
1785 * on your device's supported bands.
1787 WARN_ON(!bands_set
);
1789 EXPORT_SYMBOL(wiphy_apply_custom_regulatory
);
1791 static void reg_set_request_processed(void)
1793 bool need_more_processing
= false;
1794 struct regulatory_request
*lr
= get_last_request();
1796 lr
->processed
= true;
1798 spin_lock(®_requests_lock
);
1799 if (!list_empty(®_requests_list
))
1800 need_more_processing
= true;
1801 spin_unlock(®_requests_lock
);
1803 if (lr
->initiator
== NL80211_REGDOM_SET_BY_USER
)
1804 cancel_delayed_work(®_timeout
);
1806 if (need_more_processing
)
1807 schedule_work(®_work
);
1811 * reg_process_hint_core - process core regulatory requests
1812 * @pending_request: a pending core regulatory request
1814 * The wireless subsystem can use this function to process
1815 * a regulatory request issued by the regulatory core.
1817 * Returns one of the different reg request treatment values.
1819 static enum reg_request_treatment
1820 reg_process_hint_core(struct regulatory_request
*core_request
)
1823 core_request
->intersect
= false;
1824 core_request
->processed
= false;
1826 reg_update_last_request(core_request
);
1828 return reg_call_crda(core_request
);
1831 static enum reg_request_treatment
1832 __reg_process_hint_user(struct regulatory_request
*user_request
)
1834 struct regulatory_request
*lr
= get_last_request();
1836 if (reg_request_indoor(user_request
)) {
1837 reg_is_indoor
= true;
1838 return REG_REQ_USER_HINT_HANDLED
;
1841 if (reg_request_cell_base(user_request
))
1842 return reg_ignore_cell_hint(user_request
);
1844 if (reg_request_cell_base(lr
))
1845 return REG_REQ_IGNORE
;
1847 if (lr
->initiator
== NL80211_REGDOM_SET_BY_COUNTRY_IE
)
1848 return REG_REQ_INTERSECT
;
1850 * If the user knows better the user should set the regdom
1851 * to their country before the IE is picked up
1853 if (lr
->initiator
== NL80211_REGDOM_SET_BY_USER
&&
1855 return REG_REQ_IGNORE
;
1857 * Process user requests only after previous user/driver/core
1858 * requests have been processed
1860 if ((lr
->initiator
== NL80211_REGDOM_SET_BY_CORE
||
1861 lr
->initiator
== NL80211_REGDOM_SET_BY_DRIVER
||
1862 lr
->initiator
== NL80211_REGDOM_SET_BY_USER
) &&
1863 regdom_changes(lr
->alpha2
))
1864 return REG_REQ_IGNORE
;
1866 if (!regdom_changes(user_request
->alpha2
))
1867 return REG_REQ_ALREADY_SET
;
1873 * reg_process_hint_user - process user regulatory requests
1874 * @user_request: a pending user regulatory request
1876 * The wireless subsystem can use this function to process
1877 * a regulatory request initiated by userspace.
1879 * Returns one of the different reg request treatment values.
1881 static enum reg_request_treatment
1882 reg_process_hint_user(struct regulatory_request
*user_request
)
1884 enum reg_request_treatment treatment
;
1886 treatment
= __reg_process_hint_user(user_request
);
1887 if (treatment
== REG_REQ_IGNORE
||
1888 treatment
== REG_REQ_ALREADY_SET
||
1889 treatment
== REG_REQ_USER_HINT_HANDLED
) {
1890 reg_free_request(user_request
);
1894 user_request
->intersect
= treatment
== REG_REQ_INTERSECT
;
1895 user_request
->processed
= false;
1897 reg_update_last_request(user_request
);
1899 user_alpha2
[0] = user_request
->alpha2
[0];
1900 user_alpha2
[1] = user_request
->alpha2
[1];
1902 return reg_call_crda(user_request
);
1905 static enum reg_request_treatment
1906 __reg_process_hint_driver(struct regulatory_request
*driver_request
)
1908 struct regulatory_request
*lr
= get_last_request();
1910 if (lr
->initiator
== NL80211_REGDOM_SET_BY_CORE
) {
1911 if (regdom_changes(driver_request
->alpha2
))
1913 return REG_REQ_ALREADY_SET
;
1917 * This would happen if you unplug and plug your card
1918 * back in or if you add a new device for which the previously
1919 * loaded card also agrees on the regulatory domain.
1921 if (lr
->initiator
== NL80211_REGDOM_SET_BY_DRIVER
&&
1922 !regdom_changes(driver_request
->alpha2
))
1923 return REG_REQ_ALREADY_SET
;
1925 return REG_REQ_INTERSECT
;
1929 * reg_process_hint_driver - process driver regulatory requests
1930 * @driver_request: a pending driver regulatory request
1932 * The wireless subsystem can use this function to process
1933 * a regulatory request issued by an 802.11 driver.
1935 * Returns one of the different reg request treatment values.
1937 static enum reg_request_treatment
1938 reg_process_hint_driver(struct wiphy
*wiphy
,
1939 struct regulatory_request
*driver_request
)
1941 const struct ieee80211_regdomain
*regd
, *tmp
;
1942 enum reg_request_treatment treatment
;
1944 treatment
= __reg_process_hint_driver(driver_request
);
1946 switch (treatment
) {
1949 case REG_REQ_IGNORE
:
1950 case REG_REQ_USER_HINT_HANDLED
:
1951 reg_free_request(driver_request
);
1953 case REG_REQ_INTERSECT
:
1955 case REG_REQ_ALREADY_SET
:
1956 regd
= reg_copy_regd(get_cfg80211_regdom());
1958 reg_free_request(driver_request
);
1959 return REG_REQ_IGNORE
;
1962 tmp
= get_wiphy_regdom(wiphy
);
1963 rcu_assign_pointer(wiphy
->regd
, regd
);
1964 rcu_free_regdom(tmp
);
1968 driver_request
->intersect
= treatment
== REG_REQ_INTERSECT
;
1969 driver_request
->processed
= false;
1971 reg_update_last_request(driver_request
);
1974 * Since CRDA will not be called in this case as we already
1975 * have applied the requested regulatory domain before we just
1976 * inform userspace we have processed the request
1978 if (treatment
== REG_REQ_ALREADY_SET
) {
1979 nl80211_send_reg_change_event(driver_request
);
1980 reg_set_request_processed();
1984 return reg_call_crda(driver_request
);
1987 static enum reg_request_treatment
1988 __reg_process_hint_country_ie(struct wiphy
*wiphy
,
1989 struct regulatory_request
*country_ie_request
)
1991 struct wiphy
*last_wiphy
= NULL
;
1992 struct regulatory_request
*lr
= get_last_request();
1994 if (reg_request_cell_base(lr
)) {
1995 /* Trust a Cell base station over the AP's country IE */
1996 if (regdom_changes(country_ie_request
->alpha2
))
1997 return REG_REQ_IGNORE
;
1998 return REG_REQ_ALREADY_SET
;
2000 if (wiphy
->regulatory_flags
& REGULATORY_COUNTRY_IE_IGNORE
)
2001 return REG_REQ_IGNORE
;
2004 if (unlikely(!is_an_alpha2(country_ie_request
->alpha2
)))
2007 if (lr
->initiator
!= NL80211_REGDOM_SET_BY_COUNTRY_IE
)
2010 last_wiphy
= wiphy_idx_to_wiphy(lr
->wiphy_idx
);
2012 if (last_wiphy
!= wiphy
) {
2014 * Two cards with two APs claiming different
2015 * Country IE alpha2s. We could
2016 * intersect them, but that seems unlikely
2017 * to be correct. Reject second one for now.
2019 if (regdom_changes(country_ie_request
->alpha2
))
2020 return REG_REQ_IGNORE
;
2021 return REG_REQ_ALREADY_SET
;
2024 if (regdom_changes(country_ie_request
->alpha2
))
2026 return REG_REQ_ALREADY_SET
;
2030 * reg_process_hint_country_ie - process regulatory requests from country IEs
2031 * @country_ie_request: a regulatory request from a country IE
2033 * The wireless subsystem can use this function to process
2034 * a regulatory request issued by a country Information Element.
2036 * Returns one of the different reg request treatment values.
2038 static enum reg_request_treatment
2039 reg_process_hint_country_ie(struct wiphy
*wiphy
,
2040 struct regulatory_request
*country_ie_request
)
2042 enum reg_request_treatment treatment
;
2044 treatment
= __reg_process_hint_country_ie(wiphy
, country_ie_request
);
2046 switch (treatment
) {
2049 case REG_REQ_IGNORE
:
2050 case REG_REQ_USER_HINT_HANDLED
:
2052 case REG_REQ_ALREADY_SET
:
2053 reg_free_request(country_ie_request
);
2055 case REG_REQ_INTERSECT
:
2056 reg_free_request(country_ie_request
);
2058 * This doesn't happen yet, not sure we
2059 * ever want to support it for this case.
2061 WARN_ONCE(1, "Unexpected intersection for country IEs");
2062 return REG_REQ_IGNORE
;
2065 country_ie_request
->intersect
= false;
2066 country_ie_request
->processed
= false;
2068 reg_update_last_request(country_ie_request
);
2070 return reg_call_crda(country_ie_request
);
2073 /* This processes *all* regulatory hints */
2074 static void reg_process_hint(struct regulatory_request
*reg_request
)
2076 struct wiphy
*wiphy
= NULL
;
2077 enum reg_request_treatment treatment
;
2079 if (reg_request
->wiphy_idx
!= WIPHY_IDX_INVALID
)
2080 wiphy
= wiphy_idx_to_wiphy(reg_request
->wiphy_idx
);
2082 switch (reg_request
->initiator
) {
2083 case NL80211_REGDOM_SET_BY_CORE
:
2084 reg_process_hint_core(reg_request
);
2086 case NL80211_REGDOM_SET_BY_USER
:
2087 treatment
= reg_process_hint_user(reg_request
);
2088 if (treatment
== REG_REQ_IGNORE
||
2089 treatment
== REG_REQ_ALREADY_SET
||
2090 treatment
== REG_REQ_USER_HINT_HANDLED
)
2092 queue_delayed_work(system_power_efficient_wq
,
2093 ®_timeout
, msecs_to_jiffies(3142));
2095 case NL80211_REGDOM_SET_BY_DRIVER
:
2098 treatment
= reg_process_hint_driver(wiphy
, reg_request
);
2100 case NL80211_REGDOM_SET_BY_COUNTRY_IE
:
2103 treatment
= reg_process_hint_country_ie(wiphy
, reg_request
);
2106 WARN(1, "invalid initiator %d\n", reg_request
->initiator
);
2110 /* This is required so that the orig_* parameters are saved */
2111 if (treatment
== REG_REQ_ALREADY_SET
&& wiphy
&&
2112 wiphy
->regulatory_flags
& REGULATORY_STRICT_REG
) {
2113 wiphy_update_regulatory(wiphy
, reg_request
->initiator
);
2114 reg_check_channels();
2120 reg_free_request(reg_request
);
2123 static bool reg_only_self_managed_wiphys(void)
2125 struct cfg80211_registered_device
*rdev
;
2126 struct wiphy
*wiphy
;
2127 bool self_managed_found
= false;
2131 list_for_each_entry(rdev
, &cfg80211_rdev_list
, list
) {
2132 wiphy
= &rdev
->wiphy
;
2133 if (wiphy
->regulatory_flags
& REGULATORY_WIPHY_SELF_MANAGED
)
2134 self_managed_found
= true;
2139 /* make sure at least one self-managed wiphy exists */
2140 return self_managed_found
;
2144 * Processes regulatory hints, this is all the NL80211_REGDOM_SET_BY_*
2145 * Regulatory hints come on a first come first serve basis and we
2146 * must process each one atomically.
2148 static void reg_process_pending_hints(void)
2150 struct regulatory_request
*reg_request
, *lr
;
2152 lr
= get_last_request();
2154 /* When last_request->processed becomes true this will be rescheduled */
2155 if (lr
&& !lr
->processed
) {
2156 reg_process_hint(lr
);
2160 spin_lock(®_requests_lock
);
2162 if (list_empty(®_requests_list
)) {
2163 spin_unlock(®_requests_lock
);
2167 reg_request
= list_first_entry(®_requests_list
,
2168 struct regulatory_request
,
2170 list_del_init(®_request
->list
);
2172 spin_unlock(®_requests_lock
);
2174 if (reg_only_self_managed_wiphys()) {
2175 reg_free_request(reg_request
);
2179 reg_process_hint(reg_request
);
2182 /* Processes beacon hints -- this has nothing to do with country IEs */
2183 static void reg_process_pending_beacon_hints(void)
2185 struct cfg80211_registered_device
*rdev
;
2186 struct reg_beacon
*pending_beacon
, *tmp
;
2188 /* This goes through the _pending_ beacon list */
2189 spin_lock_bh(®_pending_beacons_lock
);
2191 list_for_each_entry_safe(pending_beacon
, tmp
,
2192 ®_pending_beacons
, list
) {
2193 list_del_init(&pending_beacon
->list
);
2195 /* Applies the beacon hint to current wiphys */
2196 list_for_each_entry(rdev
, &cfg80211_rdev_list
, list
)
2197 wiphy_update_new_beacon(&rdev
->wiphy
, pending_beacon
);
2199 /* Remembers the beacon hint for new wiphys or reg changes */
2200 list_add_tail(&pending_beacon
->list
, ®_beacon_list
);
2203 spin_unlock_bh(®_pending_beacons_lock
);
2206 static void reg_process_self_managed_hints(void)
2208 struct cfg80211_registered_device
*rdev
;
2209 struct wiphy
*wiphy
;
2210 const struct ieee80211_regdomain
*tmp
;
2211 const struct ieee80211_regdomain
*regd
;
2212 enum ieee80211_band band
;
2213 struct regulatory_request request
= {};
2215 list_for_each_entry(rdev
, &cfg80211_rdev_list
, list
) {
2216 wiphy
= &rdev
->wiphy
;
2218 spin_lock(®_requests_lock
);
2219 regd
= rdev
->requested_regd
;
2220 rdev
->requested_regd
= NULL
;
2221 spin_unlock(®_requests_lock
);
2226 tmp
= get_wiphy_regdom(wiphy
);
2227 rcu_assign_pointer(wiphy
->regd
, regd
);
2228 rcu_free_regdom(tmp
);
2230 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++)
2231 handle_band_custom(wiphy
, wiphy
->bands
[band
], regd
);
2233 reg_process_ht_flags(wiphy
);
2235 request
.wiphy_idx
= get_wiphy_idx(wiphy
);
2236 request
.alpha2
[0] = regd
->alpha2
[0];
2237 request
.alpha2
[1] = regd
->alpha2
[1];
2238 request
.initiator
= NL80211_REGDOM_SET_BY_DRIVER
;
2240 nl80211_send_wiphy_reg_change_event(&request
);
2243 reg_check_channels();
2246 static void reg_todo(struct work_struct
*work
)
2249 reg_process_pending_hints();
2250 reg_process_pending_beacon_hints();
2251 reg_process_self_managed_hints();
2255 static void queue_regulatory_request(struct regulatory_request
*request
)
2257 request
->alpha2
[0] = toupper(request
->alpha2
[0]);
2258 request
->alpha2
[1] = toupper(request
->alpha2
[1]);
2260 spin_lock(®_requests_lock
);
2261 list_add_tail(&request
->list
, ®_requests_list
);
2262 spin_unlock(®_requests_lock
);
2264 schedule_work(®_work
);
2268 * Core regulatory hint -- happens during cfg80211_init()
2269 * and when we restore regulatory settings.
2271 static int regulatory_hint_core(const char *alpha2
)
2273 struct regulatory_request
*request
;
2275 request
= kzalloc(sizeof(struct regulatory_request
), GFP_KERNEL
);
2279 request
->alpha2
[0] = alpha2
[0];
2280 request
->alpha2
[1] = alpha2
[1];
2281 request
->initiator
= NL80211_REGDOM_SET_BY_CORE
;
2283 queue_regulatory_request(request
);
2289 int regulatory_hint_user(const char *alpha2
,
2290 enum nl80211_user_reg_hint_type user_reg_hint_type
)
2292 struct regulatory_request
*request
;
2294 if (WARN_ON(!alpha2
))
2297 request
= kzalloc(sizeof(struct regulatory_request
), GFP_KERNEL
);
2301 request
->wiphy_idx
= WIPHY_IDX_INVALID
;
2302 request
->alpha2
[0] = alpha2
[0];
2303 request
->alpha2
[1] = alpha2
[1];
2304 request
->initiator
= NL80211_REGDOM_SET_BY_USER
;
2305 request
->user_reg_hint_type
= user_reg_hint_type
;
2307 queue_regulatory_request(request
);
2312 int regulatory_hint_indoor_user(void)
2314 struct regulatory_request
*request
;
2316 request
= kzalloc(sizeof(struct regulatory_request
), GFP_KERNEL
);
2320 request
->wiphy_idx
= WIPHY_IDX_INVALID
;
2321 request
->initiator
= NL80211_REGDOM_SET_BY_USER
;
2322 request
->user_reg_hint_type
= NL80211_USER_REG_HINT_INDOOR
;
2323 queue_regulatory_request(request
);
2329 int regulatory_hint(struct wiphy
*wiphy
, const char *alpha2
)
2331 struct regulatory_request
*request
;
2333 if (WARN_ON(!alpha2
|| !wiphy
))
2336 wiphy
->regulatory_flags
&= ~REGULATORY_CUSTOM_REG
;
2338 request
= kzalloc(sizeof(struct regulatory_request
), GFP_KERNEL
);
2342 request
->wiphy_idx
= get_wiphy_idx(wiphy
);
2344 request
->alpha2
[0] = alpha2
[0];
2345 request
->alpha2
[1] = alpha2
[1];
2346 request
->initiator
= NL80211_REGDOM_SET_BY_DRIVER
;
2348 queue_regulatory_request(request
);
2352 EXPORT_SYMBOL(regulatory_hint
);
2354 void regulatory_hint_country_ie(struct wiphy
*wiphy
, enum ieee80211_band band
,
2355 const u8
*country_ie
, u8 country_ie_len
)
2358 enum environment_cap env
= ENVIRON_ANY
;
2359 struct regulatory_request
*request
= NULL
, *lr
;
2361 /* IE len must be evenly divisible by 2 */
2362 if (country_ie_len
& 0x01)
2365 if (country_ie_len
< IEEE80211_COUNTRY_IE_MIN_LEN
)
2368 request
= kzalloc(sizeof(*request
), GFP_KERNEL
);
2372 alpha2
[0] = country_ie
[0];
2373 alpha2
[1] = country_ie
[1];
2375 if (country_ie
[2] == 'I')
2376 env
= ENVIRON_INDOOR
;
2377 else if (country_ie
[2] == 'O')
2378 env
= ENVIRON_OUTDOOR
;
2381 lr
= get_last_request();
2387 * We will run this only upon a successful connection on cfg80211.
2388 * We leave conflict resolution to the workqueue, where can hold
2391 if (lr
->initiator
== NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
2392 lr
->wiphy_idx
!= WIPHY_IDX_INVALID
)
2395 request
->wiphy_idx
= get_wiphy_idx(wiphy
);
2396 request
->alpha2
[0] = alpha2
[0];
2397 request
->alpha2
[1] = alpha2
[1];
2398 request
->initiator
= NL80211_REGDOM_SET_BY_COUNTRY_IE
;
2399 request
->country_ie_env
= env
;
2401 queue_regulatory_request(request
);
2408 static void restore_alpha2(char *alpha2
, bool reset_user
)
2410 /* indicates there is no alpha2 to consider for restoration */
2414 /* The user setting has precedence over the module parameter */
2415 if (is_user_regdom_saved()) {
2416 /* Unless we're asked to ignore it and reset it */
2418 REG_DBG_PRINT("Restoring regulatory settings including user preference\n");
2419 user_alpha2
[0] = '9';
2420 user_alpha2
[1] = '7';
2423 * If we're ignoring user settings, we still need to
2424 * check the module parameter to ensure we put things
2425 * back as they were for a full restore.
2427 if (!is_world_regdom(ieee80211_regdom
)) {
2428 REG_DBG_PRINT("Keeping preference on module parameter ieee80211_regdom: %c%c\n",
2429 ieee80211_regdom
[0], ieee80211_regdom
[1]);
2430 alpha2
[0] = ieee80211_regdom
[0];
2431 alpha2
[1] = ieee80211_regdom
[1];
2434 REG_DBG_PRINT("Restoring regulatory settings while preserving user preference for: %c%c\n",
2435 user_alpha2
[0], user_alpha2
[1]);
2436 alpha2
[0] = user_alpha2
[0];
2437 alpha2
[1] = user_alpha2
[1];
2439 } else if (!is_world_regdom(ieee80211_regdom
)) {
2440 REG_DBG_PRINT("Keeping preference on module parameter ieee80211_regdom: %c%c\n",
2441 ieee80211_regdom
[0], ieee80211_regdom
[1]);
2442 alpha2
[0] = ieee80211_regdom
[0];
2443 alpha2
[1] = ieee80211_regdom
[1];
2445 REG_DBG_PRINT("Restoring regulatory settings\n");
2448 static void restore_custom_reg_settings(struct wiphy
*wiphy
)
2450 struct ieee80211_supported_band
*sband
;
2451 enum ieee80211_band band
;
2452 struct ieee80211_channel
*chan
;
2455 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++) {
2456 sband
= wiphy
->bands
[band
];
2459 for (i
= 0; i
< sband
->n_channels
; i
++) {
2460 chan
= &sband
->channels
[i
];
2461 chan
->flags
= chan
->orig_flags
;
2462 chan
->max_antenna_gain
= chan
->orig_mag
;
2463 chan
->max_power
= chan
->orig_mpwr
;
2464 chan
->beacon_found
= false;
2470 * Restoring regulatory settings involves ingoring any
2471 * possibly stale country IE information and user regulatory
2472 * settings if so desired, this includes any beacon hints
2473 * learned as we could have traveled outside to another country
2474 * after disconnection. To restore regulatory settings we do
2475 * exactly what we did at bootup:
2477 * - send a core regulatory hint
2478 * - send a user regulatory hint if applicable
2480 * Device drivers that send a regulatory hint for a specific country
2481 * keep their own regulatory domain on wiphy->regd so that does does
2482 * not need to be remembered.
2484 static void restore_regulatory_settings(bool reset_user
)
2487 char world_alpha2
[2];
2488 struct reg_beacon
*reg_beacon
, *btmp
;
2489 struct regulatory_request
*reg_request
, *tmp
;
2490 LIST_HEAD(tmp_reg_req_list
);
2491 struct cfg80211_registered_device
*rdev
;
2495 reg_is_indoor
= false;
2497 reset_regdomains(true, &world_regdom
);
2498 restore_alpha2(alpha2
, reset_user
);
2501 * If there's any pending requests we simply
2502 * stash them to a temporary pending queue and
2503 * add then after we've restored regulatory
2506 spin_lock(®_requests_lock
);
2507 list_for_each_entry_safe(reg_request
, tmp
, ®_requests_list
, list
) {
2508 if (reg_request
->initiator
!= NL80211_REGDOM_SET_BY_USER
)
2510 list_move_tail(®_request
->list
, &tmp_reg_req_list
);
2512 spin_unlock(®_requests_lock
);
2514 /* Clear beacon hints */
2515 spin_lock_bh(®_pending_beacons_lock
);
2516 list_for_each_entry_safe(reg_beacon
, btmp
, ®_pending_beacons
, list
) {
2517 list_del(®_beacon
->list
);
2520 spin_unlock_bh(®_pending_beacons_lock
);
2522 list_for_each_entry_safe(reg_beacon
, btmp
, ®_beacon_list
, list
) {
2523 list_del(®_beacon
->list
);
2527 /* First restore to the basic regulatory settings */
2528 world_alpha2
[0] = cfg80211_world_regdom
->alpha2
[0];
2529 world_alpha2
[1] = cfg80211_world_regdom
->alpha2
[1];
2531 list_for_each_entry(rdev
, &cfg80211_rdev_list
, list
) {
2532 if (rdev
->wiphy
.regulatory_flags
& REGULATORY_WIPHY_SELF_MANAGED
)
2534 if (rdev
->wiphy
.regulatory_flags
& REGULATORY_CUSTOM_REG
)
2535 restore_custom_reg_settings(&rdev
->wiphy
);
2538 regulatory_hint_core(world_alpha2
);
2541 * This restores the ieee80211_regdom module parameter
2542 * preference or the last user requested regulatory
2543 * settings, user regulatory settings takes precedence.
2545 if (is_an_alpha2(alpha2
))
2546 regulatory_hint_user(user_alpha2
, NL80211_USER_REG_HINT_USER
);
2548 spin_lock(®_requests_lock
);
2549 list_splice_tail_init(&tmp_reg_req_list
, ®_requests_list
);
2550 spin_unlock(®_requests_lock
);
2552 REG_DBG_PRINT("Kicking the queue\n");
2554 schedule_work(®_work
);
2557 void regulatory_hint_disconnect(void)
2559 REG_DBG_PRINT("All devices are disconnected, going to restore regulatory settings\n");
2560 restore_regulatory_settings(false);
2563 static bool freq_is_chan_12_13_14(u16 freq
)
2565 if (freq
== ieee80211_channel_to_frequency(12, IEEE80211_BAND_2GHZ
) ||
2566 freq
== ieee80211_channel_to_frequency(13, IEEE80211_BAND_2GHZ
) ||
2567 freq
== ieee80211_channel_to_frequency(14, IEEE80211_BAND_2GHZ
))
2572 static bool pending_reg_beacon(struct ieee80211_channel
*beacon_chan
)
2574 struct reg_beacon
*pending_beacon
;
2576 list_for_each_entry(pending_beacon
, ®_pending_beacons
, list
)
2577 if (beacon_chan
->center_freq
==
2578 pending_beacon
->chan
.center_freq
)
2583 int regulatory_hint_found_beacon(struct wiphy
*wiphy
,
2584 struct ieee80211_channel
*beacon_chan
,
2587 struct reg_beacon
*reg_beacon
;
2590 if (beacon_chan
->beacon_found
||
2591 beacon_chan
->flags
& IEEE80211_CHAN_RADAR
||
2592 (beacon_chan
->band
== IEEE80211_BAND_2GHZ
&&
2593 !freq_is_chan_12_13_14(beacon_chan
->center_freq
)))
2596 spin_lock_bh(®_pending_beacons_lock
);
2597 processing
= pending_reg_beacon(beacon_chan
);
2598 spin_unlock_bh(®_pending_beacons_lock
);
2603 reg_beacon
= kzalloc(sizeof(struct reg_beacon
), gfp
);
2607 REG_DBG_PRINT("Found new beacon on frequency: %d MHz (Ch %d) on %s\n",
2608 beacon_chan
->center_freq
,
2609 ieee80211_frequency_to_channel(beacon_chan
->center_freq
),
2612 memcpy(®_beacon
->chan
, beacon_chan
,
2613 sizeof(struct ieee80211_channel
));
2616 * Since we can be called from BH or and non-BH context
2617 * we must use spin_lock_bh()
2619 spin_lock_bh(®_pending_beacons_lock
);
2620 list_add_tail(®_beacon
->list
, ®_pending_beacons
);
2621 spin_unlock_bh(®_pending_beacons_lock
);
2623 schedule_work(®_work
);
2628 static void print_rd_rules(const struct ieee80211_regdomain
*rd
)
2631 const struct ieee80211_reg_rule
*reg_rule
= NULL
;
2632 const struct ieee80211_freq_range
*freq_range
= NULL
;
2633 const struct ieee80211_power_rule
*power_rule
= NULL
;
2634 char bw
[32], cac_time
[32];
2636 pr_info(" (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp), (dfs_cac_time)\n");
2638 for (i
= 0; i
< rd
->n_reg_rules
; i
++) {
2639 reg_rule
= &rd
->reg_rules
[i
];
2640 freq_range
= ®_rule
->freq_range
;
2641 power_rule
= ®_rule
->power_rule
;
2643 if (reg_rule
->flags
& NL80211_RRF_AUTO_BW
)
2644 snprintf(bw
, sizeof(bw
), "%d KHz, %d KHz AUTO",
2645 freq_range
->max_bandwidth_khz
,
2646 reg_get_max_bandwidth(rd
, reg_rule
));
2648 snprintf(bw
, sizeof(bw
), "%d KHz",
2649 freq_range
->max_bandwidth_khz
);
2651 if (reg_rule
->flags
& NL80211_RRF_DFS
)
2652 scnprintf(cac_time
, sizeof(cac_time
), "%u s",
2653 reg_rule
->dfs_cac_ms
/1000);
2655 scnprintf(cac_time
, sizeof(cac_time
), "N/A");
2659 * There may not be documentation for max antenna gain
2660 * in certain regions
2662 if (power_rule
->max_antenna_gain
)
2663 pr_info(" (%d KHz - %d KHz @ %s), (%d mBi, %d mBm), (%s)\n",
2664 freq_range
->start_freq_khz
,
2665 freq_range
->end_freq_khz
,
2667 power_rule
->max_antenna_gain
,
2668 power_rule
->max_eirp
,
2671 pr_info(" (%d KHz - %d KHz @ %s), (N/A, %d mBm), (%s)\n",
2672 freq_range
->start_freq_khz
,
2673 freq_range
->end_freq_khz
,
2675 power_rule
->max_eirp
,
2680 bool reg_supported_dfs_region(enum nl80211_dfs_regions dfs_region
)
2682 switch (dfs_region
) {
2683 case NL80211_DFS_UNSET
:
2684 case NL80211_DFS_FCC
:
2685 case NL80211_DFS_ETSI
:
2686 case NL80211_DFS_JP
:
2689 REG_DBG_PRINT("Ignoring uknown DFS master region: %d\n",
2695 static void print_regdomain(const struct ieee80211_regdomain
*rd
)
2697 struct regulatory_request
*lr
= get_last_request();
2699 if (is_intersected_alpha2(rd
->alpha2
)) {
2700 if (lr
->initiator
== NL80211_REGDOM_SET_BY_COUNTRY_IE
) {
2701 struct cfg80211_registered_device
*rdev
;
2702 rdev
= cfg80211_rdev_by_wiphy_idx(lr
->wiphy_idx
);
2704 pr_info("Current regulatory domain updated by AP to: %c%c\n",
2705 rdev
->country_ie_alpha2
[0],
2706 rdev
->country_ie_alpha2
[1]);
2708 pr_info("Current regulatory domain intersected:\n");
2710 pr_info("Current regulatory domain intersected:\n");
2711 } else if (is_world_regdom(rd
->alpha2
)) {
2712 pr_info("World regulatory domain updated:\n");
2714 if (is_unknown_alpha2(rd
->alpha2
))
2715 pr_info("Regulatory domain changed to driver built-in settings (unknown country)\n");
2717 if (reg_request_cell_base(lr
))
2718 pr_info("Regulatory domain changed to country: %c%c by Cell Station\n",
2719 rd
->alpha2
[0], rd
->alpha2
[1]);
2721 pr_info("Regulatory domain changed to country: %c%c\n",
2722 rd
->alpha2
[0], rd
->alpha2
[1]);
2726 pr_info(" DFS Master region: %s", reg_dfs_region_str(rd
->dfs_region
));
2730 static void print_regdomain_info(const struct ieee80211_regdomain
*rd
)
2732 pr_info("Regulatory domain: %c%c\n", rd
->alpha2
[0], rd
->alpha2
[1]);
2736 static int reg_set_rd_core(const struct ieee80211_regdomain
*rd
)
2738 if (!is_world_regdom(rd
->alpha2
))
2740 update_world_regdomain(rd
);
2744 static int reg_set_rd_user(const struct ieee80211_regdomain
*rd
,
2745 struct regulatory_request
*user_request
)
2747 const struct ieee80211_regdomain
*intersected_rd
= NULL
;
2749 if (!regdom_changes(rd
->alpha2
))
2752 if (!is_valid_rd(rd
)) {
2753 pr_err("Invalid regulatory domain detected:\n");
2754 print_regdomain_info(rd
);
2758 if (!user_request
->intersect
) {
2759 reset_regdomains(false, rd
);
2763 intersected_rd
= regdom_intersect(rd
, get_cfg80211_regdom());
2764 if (!intersected_rd
)
2769 reset_regdomains(false, intersected_rd
);
2774 static int reg_set_rd_driver(const struct ieee80211_regdomain
*rd
,
2775 struct regulatory_request
*driver_request
)
2777 const struct ieee80211_regdomain
*regd
;
2778 const struct ieee80211_regdomain
*intersected_rd
= NULL
;
2779 const struct ieee80211_regdomain
*tmp
;
2780 struct wiphy
*request_wiphy
;
2782 if (is_world_regdom(rd
->alpha2
))
2785 if (!regdom_changes(rd
->alpha2
))
2788 if (!is_valid_rd(rd
)) {
2789 pr_err("Invalid regulatory domain detected:\n");
2790 print_regdomain_info(rd
);
2794 request_wiphy
= wiphy_idx_to_wiphy(driver_request
->wiphy_idx
);
2795 if (!request_wiphy
) {
2796 queue_delayed_work(system_power_efficient_wq
,
2801 if (!driver_request
->intersect
) {
2802 if (request_wiphy
->regd
)
2805 regd
= reg_copy_regd(rd
);
2807 return PTR_ERR(regd
);
2809 rcu_assign_pointer(request_wiphy
->regd
, regd
);
2810 reset_regdomains(false, rd
);
2814 intersected_rd
= regdom_intersect(rd
, get_cfg80211_regdom());
2815 if (!intersected_rd
)
2819 * We can trash what CRDA provided now.
2820 * However if a driver requested this specific regulatory
2821 * domain we keep it for its private use
2823 tmp
= get_wiphy_regdom(request_wiphy
);
2824 rcu_assign_pointer(request_wiphy
->regd
, rd
);
2825 rcu_free_regdom(tmp
);
2829 reset_regdomains(false, intersected_rd
);
2834 static int reg_set_rd_country_ie(const struct ieee80211_regdomain
*rd
,
2835 struct regulatory_request
*country_ie_request
)
2837 struct wiphy
*request_wiphy
;
2839 if (!is_alpha2_set(rd
->alpha2
) && !is_an_alpha2(rd
->alpha2
) &&
2840 !is_unknown_alpha2(rd
->alpha2
))
2844 * Lets only bother proceeding on the same alpha2 if the current
2845 * rd is non static (it means CRDA was present and was used last)
2846 * and the pending request came in from a country IE
2849 if (!is_valid_rd(rd
)) {
2850 pr_err("Invalid regulatory domain detected:\n");
2851 print_regdomain_info(rd
);
2855 request_wiphy
= wiphy_idx_to_wiphy(country_ie_request
->wiphy_idx
);
2856 if (!request_wiphy
) {
2857 queue_delayed_work(system_power_efficient_wq
,
2862 if (country_ie_request
->intersect
)
2865 reset_regdomains(false, rd
);
2870 * Use this call to set the current regulatory domain. Conflicts with
2871 * multiple drivers can be ironed out later. Caller must've already
2872 * kmalloc'd the rd structure.
2874 int set_regdom(const struct ieee80211_regdomain
*rd
)
2876 struct regulatory_request
*lr
;
2877 bool user_reset
= false;
2880 if (!reg_is_valid_request(rd
->alpha2
)) {
2885 lr
= get_last_request();
2887 /* Note that this doesn't update the wiphys, this is done below */
2888 switch (lr
->initiator
) {
2889 case NL80211_REGDOM_SET_BY_CORE
:
2890 r
= reg_set_rd_core(rd
);
2892 case NL80211_REGDOM_SET_BY_USER
:
2893 r
= reg_set_rd_user(rd
, lr
);
2896 case NL80211_REGDOM_SET_BY_DRIVER
:
2897 r
= reg_set_rd_driver(rd
, lr
);
2899 case NL80211_REGDOM_SET_BY_COUNTRY_IE
:
2900 r
= reg_set_rd_country_ie(rd
, lr
);
2903 WARN(1, "invalid initiator %d\n", lr
->initiator
);
2910 reg_set_request_processed();
2913 /* Back to world regulatory in case of errors */
2914 restore_regulatory_settings(user_reset
);
2921 /* This would make this whole thing pointless */
2922 if (WARN_ON(!lr
->intersect
&& rd
!= get_cfg80211_regdom()))
2925 /* update all wiphys now with the new established regulatory domain */
2926 update_all_wiphy_regulatory(lr
->initiator
);
2928 print_regdomain(get_cfg80211_regdom());
2930 nl80211_send_reg_change_event(lr
);
2932 reg_set_request_processed();
2937 static int __regulatory_set_wiphy_regd(struct wiphy
*wiphy
,
2938 struct ieee80211_regdomain
*rd
)
2940 const struct ieee80211_regdomain
*regd
;
2941 const struct ieee80211_regdomain
*prev_regd
;
2942 struct cfg80211_registered_device
*rdev
;
2944 if (WARN_ON(!wiphy
|| !rd
))
2947 if (WARN(!(wiphy
->regulatory_flags
& REGULATORY_WIPHY_SELF_MANAGED
),
2948 "wiphy should have REGULATORY_WIPHY_SELF_MANAGED\n"))
2951 if (WARN(!is_valid_rd(rd
), "Invalid regulatory domain detected\n")) {
2952 print_regdomain_info(rd
);
2956 regd
= reg_copy_regd(rd
);
2958 return PTR_ERR(regd
);
2960 rdev
= wiphy_to_rdev(wiphy
);
2962 spin_lock(®_requests_lock
);
2963 prev_regd
= rdev
->requested_regd
;
2964 rdev
->requested_regd
= regd
;
2965 spin_unlock(®_requests_lock
);
2971 int regulatory_set_wiphy_regd(struct wiphy
*wiphy
,
2972 struct ieee80211_regdomain
*rd
)
2974 int ret
= __regulatory_set_wiphy_regd(wiphy
, rd
);
2979 schedule_work(®_work
);
2982 EXPORT_SYMBOL(regulatory_set_wiphy_regd
);
2984 int regulatory_set_wiphy_regd_sync_rtnl(struct wiphy
*wiphy
,
2985 struct ieee80211_regdomain
*rd
)
2991 ret
= __regulatory_set_wiphy_regd(wiphy
, rd
);
2995 /* process the request immediately */
2996 reg_process_self_managed_hints();
2999 EXPORT_SYMBOL(regulatory_set_wiphy_regd_sync_rtnl
);
3001 void wiphy_regulatory_register(struct wiphy
*wiphy
)
3003 struct regulatory_request
*lr
;
3005 /* self-managed devices ignore external hints */
3006 if (wiphy
->regulatory_flags
& REGULATORY_WIPHY_SELF_MANAGED
)
3007 wiphy
->regulatory_flags
|= REGULATORY_DISABLE_BEACON_HINTS
|
3008 REGULATORY_COUNTRY_IE_IGNORE
;
3010 if (!reg_dev_ignore_cell_hint(wiphy
))
3011 reg_num_devs_support_basehint
++;
3013 lr
= get_last_request();
3014 wiphy_update_regulatory(wiphy
, lr
->initiator
);
3017 void wiphy_regulatory_deregister(struct wiphy
*wiphy
)
3019 struct wiphy
*request_wiphy
= NULL
;
3020 struct regulatory_request
*lr
;
3022 lr
= get_last_request();
3024 if (!reg_dev_ignore_cell_hint(wiphy
))
3025 reg_num_devs_support_basehint
--;
3027 rcu_free_regdom(get_wiphy_regdom(wiphy
));
3028 RCU_INIT_POINTER(wiphy
->regd
, NULL
);
3031 request_wiphy
= wiphy_idx_to_wiphy(lr
->wiphy_idx
);
3033 if (!request_wiphy
|| request_wiphy
!= wiphy
)
3036 lr
->wiphy_idx
= WIPHY_IDX_INVALID
;
3037 lr
->country_ie_env
= ENVIRON_ANY
;
3040 static void reg_timeout_work(struct work_struct
*work
)
3042 REG_DBG_PRINT("Timeout while waiting for CRDA to reply, restoring regulatory settings\n");
3044 restore_regulatory_settings(true);
3049 * See http://www.fcc.gov/document/5-ghz-unlicensed-spectrum-unii, for
3050 * UNII band definitions
3052 int cfg80211_get_unii(int freq
)
3055 if (freq
>= 5150 && freq
<= 5250)
3059 if (freq
> 5250 && freq
<= 5350)
3063 if (freq
> 5350 && freq
<= 5470)
3067 if (freq
> 5470 && freq
<= 5725)
3071 if (freq
> 5725 && freq
<= 5825)
3077 bool regulatory_indoor_allowed(void)
3079 return reg_is_indoor
;
3082 int __init
regulatory_init(void)
3086 reg_pdev
= platform_device_register_simple("regulatory", 0, NULL
, 0);
3087 if (IS_ERR(reg_pdev
))
3088 return PTR_ERR(reg_pdev
);
3090 spin_lock_init(®_requests_lock
);
3091 spin_lock_init(®_pending_beacons_lock
);
3093 reg_regdb_size_check();
3095 rcu_assign_pointer(cfg80211_regdomain
, cfg80211_world_regdom
);
3097 user_alpha2
[0] = '9';
3098 user_alpha2
[1] = '7';
3100 /* We always try to get an update for the static regdomain */
3101 err
= regulatory_hint_core(cfg80211_world_regdom
->alpha2
);
3106 * N.B. kobject_uevent_env() can fail mainly for when we're out
3107 * memory which is handled and propagated appropriately above
3108 * but it can also fail during a netlink_broadcast() or during
3109 * early boot for call_usermodehelper(). For now treat these
3110 * errors as non-fatal.
3112 pr_err("kobject_uevent_env() was unable to call CRDA during init\n");
3116 * Finally, if the user set the module parameter treat it
3119 if (!is_world_regdom(ieee80211_regdom
))
3120 regulatory_hint_user(ieee80211_regdom
,
3121 NL80211_USER_REG_HINT_USER
);
3126 void regulatory_exit(void)
3128 struct regulatory_request
*reg_request
, *tmp
;
3129 struct reg_beacon
*reg_beacon
, *btmp
;
3131 cancel_work_sync(®_work
);
3132 cancel_delayed_work_sync(®_timeout
);
3133 cancel_delayed_work_sync(®_check_chans
);
3135 /* Lock to suppress warnings */
3137 reset_regdomains(true, NULL
);
3140 dev_set_uevent_suppress(®_pdev
->dev
, true);
3142 platform_device_unregister(reg_pdev
);
3144 list_for_each_entry_safe(reg_beacon
, btmp
, ®_pending_beacons
, list
) {
3145 list_del(®_beacon
->list
);
3149 list_for_each_entry_safe(reg_beacon
, btmp
, ®_beacon_list
, list
) {
3150 list_del(®_beacon
->list
);
3154 list_for_each_entry_safe(reg_request
, tmp
, ®_requests_list
, list
) {
3155 list_del(®_request
->list
);