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.
86 enum reg_request_treatment
{
93 static struct regulatory_request core_request_world
= {
94 .initiator
= NL80211_REGDOM_SET_BY_CORE
,
99 .country_ie_env
= ENVIRON_ANY
,
103 * Receipt of information from last regulatory request,
104 * protected by RTNL (and can be accessed with RCU protection)
106 static struct regulatory_request __rcu
*last_request
=
107 (void __force __rcu
*)&core_request_world
;
109 /* To trigger userspace events */
110 static struct platform_device
*reg_pdev
;
113 * Central wireless core regulatory domains, we only need two,
114 * the current one and a world regulatory domain in case we have no
115 * information to give us an alpha2.
116 * (protected by RTNL, can be read under RCU)
118 const struct ieee80211_regdomain __rcu
*cfg80211_regdomain
;
121 * Number of devices that registered to the core
122 * that support cellular base station regulatory hints
123 * (protected by RTNL)
125 static int reg_num_devs_support_basehint
;
128 * State variable indicating if the platform on which the devices
129 * are attached is operating in an indoor environment. The state variable
130 * is relevant for all registered devices.
132 static bool reg_is_indoor
;
133 static spinlock_t reg_indoor_lock
;
135 /* Used to track the userspace process controlling the indoor setting */
136 static u32 reg_is_indoor_portid
;
138 static const struct ieee80211_regdomain
*get_cfg80211_regdom(void)
140 return rtnl_dereference(cfg80211_regdomain
);
143 const struct ieee80211_regdomain
*get_wiphy_regdom(struct wiphy
*wiphy
)
145 return rtnl_dereference(wiphy
->regd
);
148 static const char *reg_dfs_region_str(enum nl80211_dfs_regions dfs_region
)
150 switch (dfs_region
) {
151 case NL80211_DFS_UNSET
:
153 case NL80211_DFS_FCC
:
155 case NL80211_DFS_ETSI
:
163 enum nl80211_dfs_regions
reg_get_dfs_region(struct wiphy
*wiphy
)
165 const struct ieee80211_regdomain
*regd
= NULL
;
166 const struct ieee80211_regdomain
*wiphy_regd
= NULL
;
168 regd
= get_cfg80211_regdom();
172 wiphy_regd
= get_wiphy_regdom(wiphy
);
176 if (wiphy_regd
->dfs_region
== regd
->dfs_region
)
179 REG_DBG_PRINT("%s: device specific dfs_region "
180 "(%s) disagrees with cfg80211's "
181 "central dfs_region (%s)\n",
182 dev_name(&wiphy
->dev
),
183 reg_dfs_region_str(wiphy_regd
->dfs_region
),
184 reg_dfs_region_str(regd
->dfs_region
));
187 return regd
->dfs_region
;
190 static void rcu_free_regdom(const struct ieee80211_regdomain
*r
)
194 kfree_rcu((struct ieee80211_regdomain
*)r
, rcu_head
);
197 static struct regulatory_request
*get_last_request(void)
199 return rcu_dereference_rtnl(last_request
);
202 /* Used to queue up regulatory hints */
203 static LIST_HEAD(reg_requests_list
);
204 static spinlock_t reg_requests_lock
;
206 /* Used to queue up beacon hints for review */
207 static LIST_HEAD(reg_pending_beacons
);
208 static spinlock_t reg_pending_beacons_lock
;
210 /* Used to keep track of processed beacon hints */
211 static LIST_HEAD(reg_beacon_list
);
214 struct list_head list
;
215 struct ieee80211_channel chan
;
218 static void reg_check_chans_work(struct work_struct
*work
);
219 static DECLARE_DELAYED_WORK(reg_check_chans
, reg_check_chans_work
);
221 static void reg_todo(struct work_struct
*work
);
222 static DECLARE_WORK(reg_work
, reg_todo
);
224 static void reg_timeout_work(struct work_struct
*work
);
225 static DECLARE_DELAYED_WORK(reg_timeout
, reg_timeout_work
);
227 /* We keep a static world regulatory domain in case of the absence of CRDA */
228 static const struct ieee80211_regdomain world_regdom
= {
232 /* IEEE 802.11b/g, channels 1..11 */
233 REG_RULE(2412-10, 2462+10, 40, 6, 20, 0),
234 /* IEEE 802.11b/g, channels 12..13. */
235 REG_RULE(2467-10, 2472+10, 40, 6, 20,
237 /* IEEE 802.11 channel 14 - Only JP enables
238 * this and for 802.11b only */
239 REG_RULE(2484-10, 2484+10, 20, 6, 20,
241 NL80211_RRF_NO_OFDM
),
242 /* IEEE 802.11a, channel 36..48 */
243 REG_RULE(5180-10, 5240+10, 160, 6, 20,
246 /* IEEE 802.11a, channel 52..64 - DFS required */
247 REG_RULE(5260-10, 5320+10, 160, 6, 20,
251 /* IEEE 802.11a, channel 100..144 - DFS required */
252 REG_RULE(5500-10, 5720+10, 160, 6, 20,
256 /* IEEE 802.11a, channel 149..165 */
257 REG_RULE(5745-10, 5825+10, 80, 6, 20,
260 /* IEEE 802.11ad (60gHz), channels 1..3 */
261 REG_RULE(56160+2160*1-1080, 56160+2160*3+1080, 2160, 0, 0, 0),
265 /* protected by RTNL */
266 static const struct ieee80211_regdomain
*cfg80211_world_regdom
=
269 static char *ieee80211_regdom
= "00";
270 static char user_alpha2
[2];
272 module_param(ieee80211_regdom
, charp
, 0444);
273 MODULE_PARM_DESC(ieee80211_regdom
, "IEEE 802.11 regulatory domain code");
275 static void reg_free_request(struct regulatory_request
*request
)
277 if (request
!= get_last_request())
281 static void reg_free_last_request(void)
283 struct regulatory_request
*lr
= get_last_request();
285 if (lr
!= &core_request_world
&& lr
)
286 kfree_rcu(lr
, rcu_head
);
289 static void reg_update_last_request(struct regulatory_request
*request
)
291 struct regulatory_request
*lr
;
293 lr
= get_last_request();
297 reg_free_last_request();
298 rcu_assign_pointer(last_request
, request
);
301 static void reset_regdomains(bool full_reset
,
302 const struct ieee80211_regdomain
*new_regdom
)
304 const struct ieee80211_regdomain
*r
;
308 r
= get_cfg80211_regdom();
310 /* avoid freeing static information or freeing something twice */
311 if (r
== cfg80211_world_regdom
)
313 if (cfg80211_world_regdom
== &world_regdom
)
314 cfg80211_world_regdom
= NULL
;
315 if (r
== &world_regdom
)
319 rcu_free_regdom(cfg80211_world_regdom
);
321 cfg80211_world_regdom
= &world_regdom
;
322 rcu_assign_pointer(cfg80211_regdomain
, new_regdom
);
327 reg_update_last_request(&core_request_world
);
331 * Dynamic world regulatory domain requested by the wireless
332 * core upon initialization
334 static void update_world_regdomain(const struct ieee80211_regdomain
*rd
)
336 struct regulatory_request
*lr
;
338 lr
= get_last_request();
342 reset_regdomains(false, rd
);
344 cfg80211_world_regdom
= rd
;
347 bool is_world_regdom(const char *alpha2
)
351 return alpha2
[0] == '0' && alpha2
[1] == '0';
354 static bool is_alpha2_set(const char *alpha2
)
358 return alpha2
[0] && alpha2
[1];
361 static bool is_unknown_alpha2(const char *alpha2
)
366 * Special case where regulatory domain was built by driver
367 * but a specific alpha2 cannot be determined
369 return alpha2
[0] == '9' && alpha2
[1] == '9';
372 static bool is_intersected_alpha2(const char *alpha2
)
377 * Special case where regulatory domain is the
378 * result of an intersection between two regulatory domain
381 return alpha2
[0] == '9' && alpha2
[1] == '8';
384 static bool is_an_alpha2(const char *alpha2
)
388 return isalpha(alpha2
[0]) && isalpha(alpha2
[1]);
391 static bool alpha2_equal(const char *alpha2_x
, const char *alpha2_y
)
393 if (!alpha2_x
|| !alpha2_y
)
395 return alpha2_x
[0] == alpha2_y
[0] && alpha2_x
[1] == alpha2_y
[1];
398 static bool regdom_changes(const char *alpha2
)
400 const struct ieee80211_regdomain
*r
= get_cfg80211_regdom();
404 return !alpha2_equal(r
->alpha2
, alpha2
);
408 * The NL80211_REGDOM_SET_BY_USER regdom alpha2 is cached, this lets
409 * you know if a valid regulatory hint with NL80211_REGDOM_SET_BY_USER
410 * has ever been issued.
412 static bool is_user_regdom_saved(void)
414 if (user_alpha2
[0] == '9' && user_alpha2
[1] == '7')
417 /* This would indicate a mistake on the design */
418 if (WARN(!is_world_regdom(user_alpha2
) && !is_an_alpha2(user_alpha2
),
419 "Unexpected user alpha2: %c%c\n",
420 user_alpha2
[0], user_alpha2
[1]))
426 static const struct ieee80211_regdomain
*
427 reg_copy_regd(const struct ieee80211_regdomain
*src_regd
)
429 struct ieee80211_regdomain
*regd
;
434 sizeof(struct ieee80211_regdomain
) +
435 src_regd
->n_reg_rules
* sizeof(struct ieee80211_reg_rule
);
437 regd
= kzalloc(size_of_regd
, GFP_KERNEL
);
439 return ERR_PTR(-ENOMEM
);
441 memcpy(regd
, src_regd
, sizeof(struct ieee80211_regdomain
));
443 for (i
= 0; i
< src_regd
->n_reg_rules
; i
++)
444 memcpy(®d
->reg_rules
[i
], &src_regd
->reg_rules
[i
],
445 sizeof(struct ieee80211_reg_rule
));
450 #ifdef CONFIG_CFG80211_INTERNAL_REGDB
451 struct reg_regdb_search_request
{
453 struct list_head list
;
456 static LIST_HEAD(reg_regdb_search_list
);
457 static DEFINE_MUTEX(reg_regdb_search_mutex
);
459 static void reg_regdb_search(struct work_struct
*work
)
461 struct reg_regdb_search_request
*request
;
462 const struct ieee80211_regdomain
*curdom
, *regdom
= NULL
;
467 mutex_lock(®_regdb_search_mutex
);
468 while (!list_empty(®_regdb_search_list
)) {
469 request
= list_first_entry(®_regdb_search_list
,
470 struct reg_regdb_search_request
,
472 list_del(&request
->list
);
474 for (i
= 0; i
< reg_regdb_size
; i
++) {
475 curdom
= reg_regdb
[i
];
477 if (alpha2_equal(request
->alpha2
, curdom
->alpha2
)) {
478 regdom
= reg_copy_regd(curdom
);
485 mutex_unlock(®_regdb_search_mutex
);
487 if (!IS_ERR_OR_NULL(regdom
))
493 static DECLARE_WORK(reg_regdb_work
, reg_regdb_search
);
495 static void reg_regdb_query(const char *alpha2
)
497 struct reg_regdb_search_request
*request
;
502 request
= kzalloc(sizeof(struct reg_regdb_search_request
), GFP_KERNEL
);
506 memcpy(request
->alpha2
, alpha2
, 2);
508 mutex_lock(®_regdb_search_mutex
);
509 list_add_tail(&request
->list
, ®_regdb_search_list
);
510 mutex_unlock(®_regdb_search_mutex
);
512 schedule_work(®_regdb_work
);
515 /* Feel free to add any other sanity checks here */
516 static void reg_regdb_size_check(void)
518 /* We should ideally BUILD_BUG_ON() but then random builds would fail */
519 WARN_ONCE(!reg_regdb_size
, "db.txt is empty, you should update it...");
522 static inline void reg_regdb_size_check(void) {}
523 static inline void reg_regdb_query(const char *alpha2
) {}
524 #endif /* CONFIG_CFG80211_INTERNAL_REGDB */
527 * This lets us keep regulatory code which is updated on a regulatory
528 * basis in userspace.
530 static int call_crda(const char *alpha2
)
533 char *env
[] = { country
, NULL
};
535 snprintf(country
, sizeof(country
), "COUNTRY=%c%c",
536 alpha2
[0], alpha2
[1]);
538 if (!is_world_regdom((char *) alpha2
))
539 pr_info("Calling CRDA for country: %c%c\n",
540 alpha2
[0], alpha2
[1]);
542 pr_info("Calling CRDA to update world regulatory domain\n");
544 /* query internal regulatory database (if it exists) */
545 reg_regdb_query(alpha2
);
547 return kobject_uevent_env(®_pdev
->dev
.kobj
, KOBJ_CHANGE
, env
);
550 static enum reg_request_treatment
551 reg_call_crda(struct regulatory_request
*request
)
553 if (call_crda(request
->alpha2
))
554 return REG_REQ_IGNORE
;
556 queue_delayed_work(system_power_efficient_wq
,
557 ®_timeout
, msecs_to_jiffies(3142));
561 bool reg_is_valid_request(const char *alpha2
)
563 struct regulatory_request
*lr
= get_last_request();
565 if (!lr
|| lr
->processed
)
568 return alpha2_equal(lr
->alpha2
, alpha2
);
571 static const struct ieee80211_regdomain
*reg_get_regdomain(struct wiphy
*wiphy
)
573 struct regulatory_request
*lr
= get_last_request();
576 * Follow the driver's regulatory domain, if present, unless a country
577 * IE has been processed or a user wants to help complaince further
579 if (lr
->initiator
!= NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
580 lr
->initiator
!= NL80211_REGDOM_SET_BY_USER
&&
582 return get_wiphy_regdom(wiphy
);
584 return get_cfg80211_regdom();
588 reg_get_max_bandwidth_from_range(const struct ieee80211_regdomain
*rd
,
589 const struct ieee80211_reg_rule
*rule
)
591 const struct ieee80211_freq_range
*freq_range
= &rule
->freq_range
;
592 const struct ieee80211_freq_range
*freq_range_tmp
;
593 const struct ieee80211_reg_rule
*tmp
;
594 u32 start_freq
, end_freq
, idx
, no
;
596 for (idx
= 0; idx
< rd
->n_reg_rules
; idx
++)
597 if (rule
== &rd
->reg_rules
[idx
])
600 if (idx
== rd
->n_reg_rules
)
607 tmp
= &rd
->reg_rules
[--no
];
608 freq_range_tmp
= &tmp
->freq_range
;
610 if (freq_range_tmp
->end_freq_khz
< freq_range
->start_freq_khz
)
613 freq_range
= freq_range_tmp
;
616 start_freq
= freq_range
->start_freq_khz
;
619 freq_range
= &rule
->freq_range
;
622 while (no
< rd
->n_reg_rules
- 1) {
623 tmp
= &rd
->reg_rules
[++no
];
624 freq_range_tmp
= &tmp
->freq_range
;
626 if (freq_range_tmp
->start_freq_khz
> freq_range
->end_freq_khz
)
629 freq_range
= freq_range_tmp
;
632 end_freq
= freq_range
->end_freq_khz
;
634 return end_freq
- start_freq
;
637 unsigned int reg_get_max_bandwidth(const struct ieee80211_regdomain
*rd
,
638 const struct ieee80211_reg_rule
*rule
)
640 unsigned int bw
= reg_get_max_bandwidth_from_range(rd
, rule
);
642 if (rule
->flags
& NL80211_RRF_NO_160MHZ
)
643 bw
= min_t(unsigned int, bw
, MHZ_TO_KHZ(80));
644 if (rule
->flags
& NL80211_RRF_NO_80MHZ
)
645 bw
= min_t(unsigned int, bw
, MHZ_TO_KHZ(40));
648 * HT40+/HT40- limits are handled per-channel. Only limit BW if both
651 if (rule
->flags
& NL80211_RRF_NO_HT40MINUS
&&
652 rule
->flags
& NL80211_RRF_NO_HT40PLUS
)
653 bw
= min_t(unsigned int, bw
, MHZ_TO_KHZ(20));
658 /* Sanity check on a regulatory rule */
659 static bool is_valid_reg_rule(const struct ieee80211_reg_rule
*rule
)
661 const struct ieee80211_freq_range
*freq_range
= &rule
->freq_range
;
664 if (freq_range
->start_freq_khz
<= 0 || freq_range
->end_freq_khz
<= 0)
667 if (freq_range
->start_freq_khz
> freq_range
->end_freq_khz
)
670 freq_diff
= freq_range
->end_freq_khz
- freq_range
->start_freq_khz
;
672 if (freq_range
->end_freq_khz
<= freq_range
->start_freq_khz
||
673 freq_range
->max_bandwidth_khz
> freq_diff
)
679 static bool is_valid_rd(const struct ieee80211_regdomain
*rd
)
681 const struct ieee80211_reg_rule
*reg_rule
= NULL
;
684 if (!rd
->n_reg_rules
)
687 if (WARN_ON(rd
->n_reg_rules
> NL80211_MAX_SUPP_REG_RULES
))
690 for (i
= 0; i
< rd
->n_reg_rules
; i
++) {
691 reg_rule
= &rd
->reg_rules
[i
];
692 if (!is_valid_reg_rule(reg_rule
))
699 static bool reg_does_bw_fit(const struct ieee80211_freq_range
*freq_range
,
700 u32 center_freq_khz
, u32 bw_khz
)
702 u32 start_freq_khz
, end_freq_khz
;
704 start_freq_khz
= center_freq_khz
- (bw_khz
/2);
705 end_freq_khz
= center_freq_khz
+ (bw_khz
/2);
707 if (start_freq_khz
>= freq_range
->start_freq_khz
&&
708 end_freq_khz
<= freq_range
->end_freq_khz
)
715 * freq_in_rule_band - tells us if a frequency is in a frequency band
716 * @freq_range: frequency rule we want to query
717 * @freq_khz: frequency we are inquiring about
719 * This lets us know if a specific frequency rule is or is not relevant to
720 * a specific frequency's band. Bands are device specific and artificial
721 * definitions (the "2.4 GHz band", the "5 GHz band" and the "60GHz band"),
722 * however it is safe for now to assume that a frequency rule should not be
723 * part of a frequency's band if the start freq or end freq are off by more
724 * than 2 GHz for the 2.4 and 5 GHz bands, and by more than 10 GHz for the
726 * This resolution can be lowered and should be considered as we add
727 * regulatory rule support for other "bands".
729 static bool freq_in_rule_band(const struct ieee80211_freq_range
*freq_range
,
732 #define ONE_GHZ_IN_KHZ 1000000
734 * From 802.11ad: directional multi-gigabit (DMG):
735 * Pertaining to operation in a frequency band containing a channel
736 * with the Channel starting frequency above 45 GHz.
738 u32 limit
= freq_khz
> 45 * ONE_GHZ_IN_KHZ
?
739 10 * ONE_GHZ_IN_KHZ
: 2 * ONE_GHZ_IN_KHZ
;
740 if (abs(freq_khz
- freq_range
->start_freq_khz
) <= limit
)
742 if (abs(freq_khz
- freq_range
->end_freq_khz
) <= limit
)
745 #undef ONE_GHZ_IN_KHZ
749 * Later on we can perhaps use the more restrictive DFS
750 * region but we don't have information for that yet so
751 * for now simply disallow conflicts.
753 static enum nl80211_dfs_regions
754 reg_intersect_dfs_region(const enum nl80211_dfs_regions dfs_region1
,
755 const enum nl80211_dfs_regions dfs_region2
)
757 if (dfs_region1
!= dfs_region2
)
758 return NL80211_DFS_UNSET
;
763 * Helper for regdom_intersect(), this does the real
764 * mathematical intersection fun
766 static int reg_rules_intersect(const struct ieee80211_regdomain
*rd1
,
767 const struct ieee80211_regdomain
*rd2
,
768 const struct ieee80211_reg_rule
*rule1
,
769 const struct ieee80211_reg_rule
*rule2
,
770 struct ieee80211_reg_rule
*intersected_rule
)
772 const struct ieee80211_freq_range
*freq_range1
, *freq_range2
;
773 struct ieee80211_freq_range
*freq_range
;
774 const struct ieee80211_power_rule
*power_rule1
, *power_rule2
;
775 struct ieee80211_power_rule
*power_rule
;
776 u32 freq_diff
, max_bandwidth1
, max_bandwidth2
;
778 freq_range1
= &rule1
->freq_range
;
779 freq_range2
= &rule2
->freq_range
;
780 freq_range
= &intersected_rule
->freq_range
;
782 power_rule1
= &rule1
->power_rule
;
783 power_rule2
= &rule2
->power_rule
;
784 power_rule
= &intersected_rule
->power_rule
;
786 freq_range
->start_freq_khz
= max(freq_range1
->start_freq_khz
,
787 freq_range2
->start_freq_khz
);
788 freq_range
->end_freq_khz
= min(freq_range1
->end_freq_khz
,
789 freq_range2
->end_freq_khz
);
791 max_bandwidth1
= freq_range1
->max_bandwidth_khz
;
792 max_bandwidth2
= freq_range2
->max_bandwidth_khz
;
794 if (rule1
->flags
& NL80211_RRF_AUTO_BW
)
795 max_bandwidth1
= reg_get_max_bandwidth(rd1
, rule1
);
796 if (rule2
->flags
& NL80211_RRF_AUTO_BW
)
797 max_bandwidth2
= reg_get_max_bandwidth(rd2
, rule2
);
799 freq_range
->max_bandwidth_khz
= min(max_bandwidth1
, max_bandwidth2
);
801 intersected_rule
->flags
= rule1
->flags
| rule2
->flags
;
804 * In case NL80211_RRF_AUTO_BW requested for both rules
805 * set AUTO_BW in intersected rule also. Next we will
806 * calculate BW correctly in handle_channel function.
807 * In other case remove AUTO_BW flag while we calculate
808 * maximum bandwidth correctly and auto calculation is
811 if ((rule1
->flags
& NL80211_RRF_AUTO_BW
) &&
812 (rule2
->flags
& NL80211_RRF_AUTO_BW
))
813 intersected_rule
->flags
|= NL80211_RRF_AUTO_BW
;
815 intersected_rule
->flags
&= ~NL80211_RRF_AUTO_BW
;
817 freq_diff
= freq_range
->end_freq_khz
- freq_range
->start_freq_khz
;
818 if (freq_range
->max_bandwidth_khz
> freq_diff
)
819 freq_range
->max_bandwidth_khz
= freq_diff
;
821 power_rule
->max_eirp
= min(power_rule1
->max_eirp
,
822 power_rule2
->max_eirp
);
823 power_rule
->max_antenna_gain
= min(power_rule1
->max_antenna_gain
,
824 power_rule2
->max_antenna_gain
);
826 intersected_rule
->dfs_cac_ms
= max(rule1
->dfs_cac_ms
,
829 if (!is_valid_reg_rule(intersected_rule
))
835 /* check whether old rule contains new rule */
836 static bool rule_contains(struct ieee80211_reg_rule
*r1
,
837 struct ieee80211_reg_rule
*r2
)
839 /* for simplicity, currently consider only same flags */
840 if (r1
->flags
!= r2
->flags
)
843 /* verify r1 is more restrictive */
844 if ((r1
->power_rule
.max_antenna_gain
>
845 r2
->power_rule
.max_antenna_gain
) ||
846 r1
->power_rule
.max_eirp
> r2
->power_rule
.max_eirp
)
849 /* make sure r2's range is contained within r1 */
850 if (r1
->freq_range
.start_freq_khz
> r2
->freq_range
.start_freq_khz
||
851 r1
->freq_range
.end_freq_khz
< r2
->freq_range
.end_freq_khz
)
854 /* and finally verify that r1.max_bw >= r2.max_bw */
855 if (r1
->freq_range
.max_bandwidth_khz
<
856 r2
->freq_range
.max_bandwidth_khz
)
862 /* add or extend current rules. do nothing if rule is already contained */
863 static void add_rule(struct ieee80211_reg_rule
*rule
,
864 struct ieee80211_reg_rule
*reg_rules
, u32
*n_rules
)
866 struct ieee80211_reg_rule
*tmp_rule
;
869 for (i
= 0; i
< *n_rules
; i
++) {
870 tmp_rule
= ®_rules
[i
];
871 /* rule is already contained - do nothing */
872 if (rule_contains(tmp_rule
, rule
))
875 /* extend rule if possible */
876 if (rule_contains(rule
, tmp_rule
)) {
877 memcpy(tmp_rule
, rule
, sizeof(*rule
));
882 memcpy(®_rules
[*n_rules
], rule
, sizeof(*rule
));
887 * regdom_intersect - do the intersection between two regulatory domains
888 * @rd1: first regulatory domain
889 * @rd2: second regulatory domain
891 * Use this function to get the intersection between two regulatory domains.
892 * Once completed we will mark the alpha2 for the rd as intersected, "98",
893 * as no one single alpha2 can represent this regulatory domain.
895 * Returns a pointer to the regulatory domain structure which will hold the
896 * resulting intersection of rules between rd1 and rd2. We will
897 * kzalloc() this structure for you.
899 static struct ieee80211_regdomain
*
900 regdom_intersect(const struct ieee80211_regdomain
*rd1
,
901 const struct ieee80211_regdomain
*rd2
)
905 unsigned int num_rules
= 0;
906 const struct ieee80211_reg_rule
*rule1
, *rule2
;
907 struct ieee80211_reg_rule intersected_rule
;
908 struct ieee80211_regdomain
*rd
;
914 * First we get a count of the rules we'll need, then we actually
915 * build them. This is to so we can malloc() and free() a
916 * regdomain once. The reason we use reg_rules_intersect() here
917 * is it will return -EINVAL if the rule computed makes no sense.
918 * All rules that do check out OK are valid.
921 for (x
= 0; x
< rd1
->n_reg_rules
; x
++) {
922 rule1
= &rd1
->reg_rules
[x
];
923 for (y
= 0; y
< rd2
->n_reg_rules
; y
++) {
924 rule2
= &rd2
->reg_rules
[y
];
925 if (!reg_rules_intersect(rd1
, rd2
, rule1
, rule2
,
934 size_of_regd
= sizeof(struct ieee80211_regdomain
) +
935 num_rules
* sizeof(struct ieee80211_reg_rule
);
937 rd
= kzalloc(size_of_regd
, GFP_KERNEL
);
941 for (x
= 0; x
< rd1
->n_reg_rules
; x
++) {
942 rule1
= &rd1
->reg_rules
[x
];
943 for (y
= 0; y
< rd2
->n_reg_rules
; y
++) {
944 rule2
= &rd2
->reg_rules
[y
];
945 r
= reg_rules_intersect(rd1
, rd2
, rule1
, rule2
,
948 * No need to memset here the intersected rule here as
949 * we're not using the stack anymore
954 add_rule(&intersected_rule
, rd
->reg_rules
,
961 rd
->dfs_region
= reg_intersect_dfs_region(rd1
->dfs_region
,
968 * XXX: add support for the rest of enum nl80211_reg_rule_flags, we may
969 * want to just have the channel structure use these
971 static u32
map_regdom_flags(u32 rd_flags
)
973 u32 channel_flags
= 0;
974 if (rd_flags
& NL80211_RRF_NO_IR_ALL
)
975 channel_flags
|= IEEE80211_CHAN_NO_IR
;
976 if (rd_flags
& NL80211_RRF_DFS
)
977 channel_flags
|= IEEE80211_CHAN_RADAR
;
978 if (rd_flags
& NL80211_RRF_NO_OFDM
)
979 channel_flags
|= IEEE80211_CHAN_NO_OFDM
;
980 if (rd_flags
& NL80211_RRF_NO_OUTDOOR
)
981 channel_flags
|= IEEE80211_CHAN_INDOOR_ONLY
;
982 if (rd_flags
& NL80211_RRF_GO_CONCURRENT
)
983 channel_flags
|= IEEE80211_CHAN_GO_CONCURRENT
;
984 if (rd_flags
& NL80211_RRF_NO_HT40MINUS
)
985 channel_flags
|= IEEE80211_CHAN_NO_HT40MINUS
;
986 if (rd_flags
& NL80211_RRF_NO_HT40PLUS
)
987 channel_flags
|= IEEE80211_CHAN_NO_HT40PLUS
;
988 if (rd_flags
& NL80211_RRF_NO_80MHZ
)
989 channel_flags
|= IEEE80211_CHAN_NO_80MHZ
;
990 if (rd_flags
& NL80211_RRF_NO_160MHZ
)
991 channel_flags
|= IEEE80211_CHAN_NO_160MHZ
;
992 return channel_flags
;
995 static const struct ieee80211_reg_rule
*
996 freq_reg_info_regd(struct wiphy
*wiphy
, u32 center_freq
,
997 const struct ieee80211_regdomain
*regd
)
1000 bool band_rule_found
= false;
1001 bool bw_fits
= false;
1004 return ERR_PTR(-EINVAL
);
1006 for (i
= 0; i
< regd
->n_reg_rules
; i
++) {
1007 const struct ieee80211_reg_rule
*rr
;
1008 const struct ieee80211_freq_range
*fr
= NULL
;
1010 rr
= ®d
->reg_rules
[i
];
1011 fr
= &rr
->freq_range
;
1014 * We only need to know if one frequency rule was
1015 * was in center_freq's band, that's enough, so lets
1016 * not overwrite it once found
1018 if (!band_rule_found
)
1019 band_rule_found
= freq_in_rule_band(fr
, center_freq
);
1021 bw_fits
= reg_does_bw_fit(fr
, center_freq
, MHZ_TO_KHZ(20));
1023 if (band_rule_found
&& bw_fits
)
1027 if (!band_rule_found
)
1028 return ERR_PTR(-ERANGE
);
1030 return ERR_PTR(-EINVAL
);
1033 const struct ieee80211_reg_rule
*freq_reg_info(struct wiphy
*wiphy
,
1036 const struct ieee80211_regdomain
*regd
;
1038 regd
= reg_get_regdomain(wiphy
);
1040 return freq_reg_info_regd(wiphy
, center_freq
, regd
);
1042 EXPORT_SYMBOL(freq_reg_info
);
1044 const char *reg_initiator_name(enum nl80211_reg_initiator initiator
)
1046 switch (initiator
) {
1047 case NL80211_REGDOM_SET_BY_CORE
:
1049 case NL80211_REGDOM_SET_BY_USER
:
1051 case NL80211_REGDOM_SET_BY_DRIVER
:
1053 case NL80211_REGDOM_SET_BY_COUNTRY_IE
:
1054 return "country IE";
1060 EXPORT_SYMBOL(reg_initiator_name
);
1062 #ifdef CONFIG_CFG80211_REG_DEBUG
1063 static void chan_reg_rule_print_dbg(const struct ieee80211_regdomain
*regd
,
1064 struct ieee80211_channel
*chan
,
1065 const struct ieee80211_reg_rule
*reg_rule
)
1067 const struct ieee80211_power_rule
*power_rule
;
1068 const struct ieee80211_freq_range
*freq_range
;
1069 char max_antenna_gain
[32], bw
[32];
1071 power_rule
= ®_rule
->power_rule
;
1072 freq_range
= ®_rule
->freq_range
;
1074 if (!power_rule
->max_antenna_gain
)
1075 snprintf(max_antenna_gain
, sizeof(max_antenna_gain
), "N/A");
1077 snprintf(max_antenna_gain
, sizeof(max_antenna_gain
), "%d",
1078 power_rule
->max_antenna_gain
);
1080 if (reg_rule
->flags
& NL80211_RRF_AUTO_BW
)
1081 snprintf(bw
, sizeof(bw
), "%d KHz, %d KHz AUTO",
1082 freq_range
->max_bandwidth_khz
,
1083 reg_get_max_bandwidth(regd
, reg_rule
));
1085 snprintf(bw
, sizeof(bw
), "%d KHz",
1086 freq_range
->max_bandwidth_khz
);
1088 REG_DBG_PRINT("Updating information on frequency %d MHz with regulatory rule:\n",
1091 REG_DBG_PRINT("%d KHz - %d KHz @ %s), (%s mBi, %d mBm)\n",
1092 freq_range
->start_freq_khz
, freq_range
->end_freq_khz
,
1093 bw
, max_antenna_gain
,
1094 power_rule
->max_eirp
);
1097 static void chan_reg_rule_print_dbg(const struct ieee80211_regdomain
*regd
,
1098 struct ieee80211_channel
*chan
,
1099 const struct ieee80211_reg_rule
*reg_rule
)
1106 * Note that right now we assume the desired channel bandwidth
1107 * is always 20 MHz for each individual channel (HT40 uses 20 MHz
1108 * per channel, the primary and the extension channel).
1110 static void handle_channel(struct wiphy
*wiphy
,
1111 enum nl80211_reg_initiator initiator
,
1112 struct ieee80211_channel
*chan
)
1114 u32 flags
, bw_flags
= 0;
1115 const struct ieee80211_reg_rule
*reg_rule
= NULL
;
1116 const struct ieee80211_power_rule
*power_rule
= NULL
;
1117 const struct ieee80211_freq_range
*freq_range
= NULL
;
1118 struct wiphy
*request_wiphy
= NULL
;
1119 struct regulatory_request
*lr
= get_last_request();
1120 const struct ieee80211_regdomain
*regd
;
1121 u32 max_bandwidth_khz
;
1123 request_wiphy
= wiphy_idx_to_wiphy(lr
->wiphy_idx
);
1125 flags
= chan
->orig_flags
;
1127 reg_rule
= freq_reg_info(wiphy
, MHZ_TO_KHZ(chan
->center_freq
));
1128 if (IS_ERR(reg_rule
)) {
1130 * We will disable all channels that do not match our
1131 * received regulatory rule unless the hint is coming
1132 * from a Country IE and the Country IE had no information
1133 * about a band. The IEEE 802.11 spec allows for an AP
1134 * to send only a subset of the regulatory rules allowed,
1135 * so an AP in the US that only supports 2.4 GHz may only send
1136 * a country IE with information for the 2.4 GHz band
1137 * while 5 GHz is still supported.
1139 if (initiator
== NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
1140 PTR_ERR(reg_rule
) == -ERANGE
)
1143 if (lr
->initiator
== NL80211_REGDOM_SET_BY_DRIVER
&&
1144 request_wiphy
&& request_wiphy
== wiphy
&&
1145 request_wiphy
->regulatory_flags
& REGULATORY_STRICT_REG
) {
1146 REG_DBG_PRINT("Disabling freq %d MHz for good\n",
1148 chan
->orig_flags
|= IEEE80211_CHAN_DISABLED
;
1149 chan
->flags
= chan
->orig_flags
;
1151 REG_DBG_PRINT("Disabling freq %d MHz\n",
1153 chan
->flags
|= IEEE80211_CHAN_DISABLED
;
1158 regd
= reg_get_regdomain(wiphy
);
1159 chan_reg_rule_print_dbg(regd
, chan
, reg_rule
);
1161 power_rule
= ®_rule
->power_rule
;
1162 freq_range
= ®_rule
->freq_range
;
1164 max_bandwidth_khz
= freq_range
->max_bandwidth_khz
;
1165 /* Check if auto calculation requested */
1166 if (reg_rule
->flags
& NL80211_RRF_AUTO_BW
)
1167 max_bandwidth_khz
= reg_get_max_bandwidth(regd
, reg_rule
);
1169 if (max_bandwidth_khz
< MHZ_TO_KHZ(40))
1170 bw_flags
= IEEE80211_CHAN_NO_HT40
;
1171 if (max_bandwidth_khz
< MHZ_TO_KHZ(80))
1172 bw_flags
|= IEEE80211_CHAN_NO_80MHZ
;
1173 if (max_bandwidth_khz
< MHZ_TO_KHZ(160))
1174 bw_flags
|= IEEE80211_CHAN_NO_160MHZ
;
1176 if (lr
->initiator
== NL80211_REGDOM_SET_BY_DRIVER
&&
1177 request_wiphy
&& request_wiphy
== wiphy
&&
1178 request_wiphy
->regulatory_flags
& REGULATORY_STRICT_REG
) {
1180 * This guarantees the driver's requested regulatory domain
1181 * will always be used as a base for further regulatory
1184 chan
->flags
= chan
->orig_flags
=
1185 map_regdom_flags(reg_rule
->flags
) | bw_flags
;
1186 chan
->max_antenna_gain
= chan
->orig_mag
=
1187 (int) MBI_TO_DBI(power_rule
->max_antenna_gain
);
1188 chan
->max_reg_power
= chan
->max_power
= chan
->orig_mpwr
=
1189 (int) MBM_TO_DBM(power_rule
->max_eirp
);
1191 if (chan
->flags
& IEEE80211_CHAN_RADAR
) {
1192 chan
->dfs_cac_ms
= IEEE80211_DFS_MIN_CAC_TIME_MS
;
1193 if (reg_rule
->dfs_cac_ms
)
1194 chan
->dfs_cac_ms
= reg_rule
->dfs_cac_ms
;
1200 chan
->dfs_state
= NL80211_DFS_USABLE
;
1201 chan
->dfs_state_entered
= jiffies
;
1203 chan
->beacon_found
= false;
1204 chan
->flags
= flags
| bw_flags
| map_regdom_flags(reg_rule
->flags
);
1205 chan
->max_antenna_gain
=
1206 min_t(int, chan
->orig_mag
,
1207 MBI_TO_DBI(power_rule
->max_antenna_gain
));
1208 chan
->max_reg_power
= (int) MBM_TO_DBM(power_rule
->max_eirp
);
1210 if (chan
->flags
& IEEE80211_CHAN_RADAR
) {
1211 if (reg_rule
->dfs_cac_ms
)
1212 chan
->dfs_cac_ms
= reg_rule
->dfs_cac_ms
;
1214 chan
->dfs_cac_ms
= IEEE80211_DFS_MIN_CAC_TIME_MS
;
1217 if (chan
->orig_mpwr
) {
1219 * Devices that use REGULATORY_COUNTRY_IE_FOLLOW_POWER
1220 * will always follow the passed country IE power settings.
1222 if (initiator
== NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
1223 wiphy
->regulatory_flags
& REGULATORY_COUNTRY_IE_FOLLOW_POWER
)
1224 chan
->max_power
= chan
->max_reg_power
;
1226 chan
->max_power
= min(chan
->orig_mpwr
,
1227 chan
->max_reg_power
);
1229 chan
->max_power
= chan
->max_reg_power
;
1232 static void handle_band(struct wiphy
*wiphy
,
1233 enum nl80211_reg_initiator initiator
,
1234 struct ieee80211_supported_band
*sband
)
1241 for (i
= 0; i
< sband
->n_channels
; i
++)
1242 handle_channel(wiphy
, initiator
, &sband
->channels
[i
]);
1245 static bool reg_request_cell_base(struct regulatory_request
*request
)
1247 if (request
->initiator
!= NL80211_REGDOM_SET_BY_USER
)
1249 return request
->user_reg_hint_type
== NL80211_USER_REG_HINT_CELL_BASE
;
1252 bool reg_last_request_cell_base(void)
1254 return reg_request_cell_base(get_last_request());
1257 #ifdef CONFIG_CFG80211_REG_CELLULAR_HINTS
1258 /* Core specific check */
1259 static enum reg_request_treatment
1260 reg_ignore_cell_hint(struct regulatory_request
*pending_request
)
1262 struct regulatory_request
*lr
= get_last_request();
1264 if (!reg_num_devs_support_basehint
)
1265 return REG_REQ_IGNORE
;
1267 if (reg_request_cell_base(lr
) &&
1268 !regdom_changes(pending_request
->alpha2
))
1269 return REG_REQ_ALREADY_SET
;
1274 /* Device specific check */
1275 static bool reg_dev_ignore_cell_hint(struct wiphy
*wiphy
)
1277 return !(wiphy
->features
& NL80211_FEATURE_CELL_BASE_REG_HINTS
);
1280 static int reg_ignore_cell_hint(struct regulatory_request
*pending_request
)
1282 return REG_REQ_IGNORE
;
1285 static bool reg_dev_ignore_cell_hint(struct wiphy
*wiphy
)
1291 static bool wiphy_strict_alpha2_regd(struct wiphy
*wiphy
)
1293 if (wiphy
->regulatory_flags
& REGULATORY_STRICT_REG
&&
1294 !(wiphy
->regulatory_flags
& REGULATORY_CUSTOM_REG
))
1299 static bool ignore_reg_update(struct wiphy
*wiphy
,
1300 enum nl80211_reg_initiator initiator
)
1302 struct regulatory_request
*lr
= get_last_request();
1304 if (wiphy
->regulatory_flags
& REGULATORY_WIPHY_SELF_MANAGED
)
1308 REG_DBG_PRINT("Ignoring regulatory request set by %s "
1309 "since last_request is not set\n",
1310 reg_initiator_name(initiator
));
1314 if (initiator
== NL80211_REGDOM_SET_BY_CORE
&&
1315 wiphy
->regulatory_flags
& REGULATORY_CUSTOM_REG
) {
1316 REG_DBG_PRINT("Ignoring regulatory request set by %s "
1317 "since the driver uses its own custom "
1318 "regulatory domain\n",
1319 reg_initiator_name(initiator
));
1324 * wiphy->regd will be set once the device has its own
1325 * desired regulatory domain set
1327 if (wiphy_strict_alpha2_regd(wiphy
) && !wiphy
->regd
&&
1328 initiator
!= NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
1329 !is_world_regdom(lr
->alpha2
)) {
1330 REG_DBG_PRINT("Ignoring regulatory request set by %s "
1331 "since the driver requires its own regulatory "
1332 "domain to be set first\n",
1333 reg_initiator_name(initiator
));
1337 if (reg_request_cell_base(lr
))
1338 return reg_dev_ignore_cell_hint(wiphy
);
1343 static bool reg_is_world_roaming(struct wiphy
*wiphy
)
1345 const struct ieee80211_regdomain
*cr
= get_cfg80211_regdom();
1346 const struct ieee80211_regdomain
*wr
= get_wiphy_regdom(wiphy
);
1347 struct regulatory_request
*lr
= get_last_request();
1349 if (is_world_regdom(cr
->alpha2
) || (wr
&& is_world_regdom(wr
->alpha2
)))
1352 if (lr
&& lr
->initiator
!= NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
1353 wiphy
->regulatory_flags
& REGULATORY_CUSTOM_REG
)
1359 static void handle_reg_beacon(struct wiphy
*wiphy
, unsigned int chan_idx
,
1360 struct reg_beacon
*reg_beacon
)
1362 struct ieee80211_supported_band
*sband
;
1363 struct ieee80211_channel
*chan
;
1364 bool channel_changed
= false;
1365 struct ieee80211_channel chan_before
;
1367 sband
= wiphy
->bands
[reg_beacon
->chan
.band
];
1368 chan
= &sband
->channels
[chan_idx
];
1370 if (likely(chan
->center_freq
!= reg_beacon
->chan
.center_freq
))
1373 if (chan
->beacon_found
)
1376 chan
->beacon_found
= true;
1378 if (!reg_is_world_roaming(wiphy
))
1381 if (wiphy
->regulatory_flags
& REGULATORY_DISABLE_BEACON_HINTS
)
1384 chan_before
.center_freq
= chan
->center_freq
;
1385 chan_before
.flags
= chan
->flags
;
1387 if (chan
->flags
& IEEE80211_CHAN_NO_IR
) {
1388 chan
->flags
&= ~IEEE80211_CHAN_NO_IR
;
1389 channel_changed
= true;
1392 if (channel_changed
)
1393 nl80211_send_beacon_hint_event(wiphy
, &chan_before
, chan
);
1397 * Called when a scan on a wiphy finds a beacon on
1400 static void wiphy_update_new_beacon(struct wiphy
*wiphy
,
1401 struct reg_beacon
*reg_beacon
)
1404 struct ieee80211_supported_band
*sband
;
1406 if (!wiphy
->bands
[reg_beacon
->chan
.band
])
1409 sband
= wiphy
->bands
[reg_beacon
->chan
.band
];
1411 for (i
= 0; i
< sband
->n_channels
; i
++)
1412 handle_reg_beacon(wiphy
, i
, reg_beacon
);
1416 * Called upon reg changes or a new wiphy is added
1418 static void wiphy_update_beacon_reg(struct wiphy
*wiphy
)
1421 struct ieee80211_supported_band
*sband
;
1422 struct reg_beacon
*reg_beacon
;
1424 list_for_each_entry(reg_beacon
, ®_beacon_list
, list
) {
1425 if (!wiphy
->bands
[reg_beacon
->chan
.band
])
1427 sband
= wiphy
->bands
[reg_beacon
->chan
.band
];
1428 for (i
= 0; i
< sband
->n_channels
; i
++)
1429 handle_reg_beacon(wiphy
, i
, reg_beacon
);
1433 /* Reap the advantages of previously found beacons */
1434 static void reg_process_beacons(struct wiphy
*wiphy
)
1437 * Means we are just firing up cfg80211, so no beacons would
1438 * have been processed yet.
1442 wiphy_update_beacon_reg(wiphy
);
1445 static bool is_ht40_allowed(struct ieee80211_channel
*chan
)
1449 if (chan
->flags
& IEEE80211_CHAN_DISABLED
)
1451 /* This would happen when regulatory rules disallow HT40 completely */
1452 if ((chan
->flags
& IEEE80211_CHAN_NO_HT40
) == IEEE80211_CHAN_NO_HT40
)
1457 static void reg_process_ht_flags_channel(struct wiphy
*wiphy
,
1458 struct ieee80211_channel
*channel
)
1460 struct ieee80211_supported_band
*sband
= wiphy
->bands
[channel
->band
];
1461 struct ieee80211_channel
*channel_before
= NULL
, *channel_after
= NULL
;
1464 if (!is_ht40_allowed(channel
)) {
1465 channel
->flags
|= IEEE80211_CHAN_NO_HT40
;
1470 * We need to ensure the extension channels exist to
1471 * be able to use HT40- or HT40+, this finds them (or not)
1473 for (i
= 0; i
< sband
->n_channels
; i
++) {
1474 struct ieee80211_channel
*c
= &sband
->channels
[i
];
1476 if (c
->center_freq
== (channel
->center_freq
- 20))
1478 if (c
->center_freq
== (channel
->center_freq
+ 20))
1483 * Please note that this assumes target bandwidth is 20 MHz,
1484 * if that ever changes we also need to change the below logic
1485 * to include that as well.
1487 if (!is_ht40_allowed(channel_before
))
1488 channel
->flags
|= IEEE80211_CHAN_NO_HT40MINUS
;
1490 channel
->flags
&= ~IEEE80211_CHAN_NO_HT40MINUS
;
1492 if (!is_ht40_allowed(channel_after
))
1493 channel
->flags
|= IEEE80211_CHAN_NO_HT40PLUS
;
1495 channel
->flags
&= ~IEEE80211_CHAN_NO_HT40PLUS
;
1498 static void reg_process_ht_flags_band(struct wiphy
*wiphy
,
1499 struct ieee80211_supported_band
*sband
)
1506 for (i
= 0; i
< sband
->n_channels
; i
++)
1507 reg_process_ht_flags_channel(wiphy
, &sband
->channels
[i
]);
1510 static void reg_process_ht_flags(struct wiphy
*wiphy
)
1512 enum ieee80211_band band
;
1517 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++)
1518 reg_process_ht_flags_band(wiphy
, wiphy
->bands
[band
]);
1521 static void reg_call_notifier(struct wiphy
*wiphy
,
1522 struct regulatory_request
*request
)
1524 if (wiphy
->reg_notifier
)
1525 wiphy
->reg_notifier(wiphy
, request
);
1528 static bool reg_wdev_chan_valid(struct wiphy
*wiphy
, struct wireless_dev
*wdev
)
1530 struct cfg80211_chan_def chandef
;
1531 struct cfg80211_registered_device
*rdev
= wiphy_to_rdev(wiphy
);
1532 enum nl80211_iftype iftype
;
1535 iftype
= wdev
->iftype
;
1537 /* make sure the interface is active */
1538 if (!wdev
->netdev
|| !netif_running(wdev
->netdev
))
1539 goto wdev_inactive_unlock
;
1542 case NL80211_IFTYPE_AP
:
1543 case NL80211_IFTYPE_P2P_GO
:
1544 if (!wdev
->beacon_interval
)
1545 goto wdev_inactive_unlock
;
1546 chandef
= wdev
->chandef
;
1548 case NL80211_IFTYPE_ADHOC
:
1549 if (!wdev
->ssid_len
)
1550 goto wdev_inactive_unlock
;
1551 chandef
= wdev
->chandef
;
1553 case NL80211_IFTYPE_STATION
:
1554 case NL80211_IFTYPE_P2P_CLIENT
:
1555 if (!wdev
->current_bss
||
1556 !wdev
->current_bss
->pub
.channel
)
1557 goto wdev_inactive_unlock
;
1559 if (!rdev
->ops
->get_channel
||
1560 rdev_get_channel(rdev
, wdev
, &chandef
))
1561 cfg80211_chandef_create(&chandef
,
1562 wdev
->current_bss
->pub
.channel
,
1563 NL80211_CHAN_NO_HT
);
1565 case NL80211_IFTYPE_MONITOR
:
1566 case NL80211_IFTYPE_AP_VLAN
:
1567 case NL80211_IFTYPE_P2P_DEVICE
:
1568 /* no enforcement required */
1571 /* others not implemented for now */
1579 case NL80211_IFTYPE_AP
:
1580 case NL80211_IFTYPE_P2P_GO
:
1581 case NL80211_IFTYPE_ADHOC
:
1582 return cfg80211_reg_can_beacon(wiphy
, &chandef
, iftype
);
1583 case NL80211_IFTYPE_STATION
:
1584 case NL80211_IFTYPE_P2P_CLIENT
:
1585 return cfg80211_chandef_usable(wiphy
, &chandef
,
1586 IEEE80211_CHAN_DISABLED
);
1593 wdev_inactive_unlock
:
1598 static void reg_leave_invalid_chans(struct wiphy
*wiphy
)
1600 struct wireless_dev
*wdev
;
1601 struct cfg80211_registered_device
*rdev
= wiphy_to_rdev(wiphy
);
1605 list_for_each_entry(wdev
, &rdev
->wdev_list
, list
)
1606 if (!reg_wdev_chan_valid(wiphy
, wdev
))
1607 cfg80211_leave(rdev
, wdev
);
1610 static void reg_check_chans_work(struct work_struct
*work
)
1612 struct cfg80211_registered_device
*rdev
;
1614 REG_DBG_PRINT("Verifying active interfaces after reg change\n");
1617 list_for_each_entry(rdev
, &cfg80211_rdev_list
, list
)
1618 if (!(rdev
->wiphy
.regulatory_flags
&
1619 REGULATORY_IGNORE_STALE_KICKOFF
))
1620 reg_leave_invalid_chans(&rdev
->wiphy
);
1625 static void reg_check_channels(void)
1628 * Give usermode a chance to do something nicer (move to another
1629 * channel, orderly disconnection), before forcing a disconnection.
1631 mod_delayed_work(system_power_efficient_wq
,
1633 msecs_to_jiffies(REG_ENFORCE_GRACE_MS
));
1636 static void wiphy_update_regulatory(struct wiphy
*wiphy
,
1637 enum nl80211_reg_initiator initiator
)
1639 enum ieee80211_band band
;
1640 struct regulatory_request
*lr
= get_last_request();
1642 if (ignore_reg_update(wiphy
, initiator
)) {
1644 * Regulatory updates set by CORE are ignored for custom
1645 * regulatory cards. Let us notify the changes to the driver,
1646 * as some drivers used this to restore its orig_* reg domain.
1648 if (initiator
== NL80211_REGDOM_SET_BY_CORE
&&
1649 wiphy
->regulatory_flags
& REGULATORY_CUSTOM_REG
)
1650 reg_call_notifier(wiphy
, lr
);
1654 lr
->dfs_region
= get_cfg80211_regdom()->dfs_region
;
1656 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++)
1657 handle_band(wiphy
, initiator
, wiphy
->bands
[band
]);
1659 reg_process_beacons(wiphy
);
1660 reg_process_ht_flags(wiphy
);
1661 reg_call_notifier(wiphy
, lr
);
1664 static void update_all_wiphy_regulatory(enum nl80211_reg_initiator initiator
)
1666 struct cfg80211_registered_device
*rdev
;
1667 struct wiphy
*wiphy
;
1671 list_for_each_entry(rdev
, &cfg80211_rdev_list
, list
) {
1672 wiphy
= &rdev
->wiphy
;
1673 wiphy_update_regulatory(wiphy
, initiator
);
1676 reg_check_channels();
1679 static void handle_channel_custom(struct wiphy
*wiphy
,
1680 struct ieee80211_channel
*chan
,
1681 const struct ieee80211_regdomain
*regd
)
1684 const struct ieee80211_reg_rule
*reg_rule
= NULL
;
1685 const struct ieee80211_power_rule
*power_rule
= NULL
;
1686 const struct ieee80211_freq_range
*freq_range
= NULL
;
1687 u32 max_bandwidth_khz
;
1689 reg_rule
= freq_reg_info_regd(wiphy
, MHZ_TO_KHZ(chan
->center_freq
),
1692 if (IS_ERR(reg_rule
)) {
1693 REG_DBG_PRINT("Disabling freq %d MHz as custom regd has no rule that fits it\n",
1695 if (wiphy
->regulatory_flags
& REGULATORY_WIPHY_SELF_MANAGED
) {
1696 chan
->flags
|= IEEE80211_CHAN_DISABLED
;
1698 chan
->orig_flags
|= IEEE80211_CHAN_DISABLED
;
1699 chan
->flags
= chan
->orig_flags
;
1704 chan_reg_rule_print_dbg(regd
, chan
, reg_rule
);
1706 power_rule
= ®_rule
->power_rule
;
1707 freq_range
= ®_rule
->freq_range
;
1709 max_bandwidth_khz
= freq_range
->max_bandwidth_khz
;
1710 /* Check if auto calculation requested */
1711 if (reg_rule
->flags
& NL80211_RRF_AUTO_BW
)
1712 max_bandwidth_khz
= reg_get_max_bandwidth(regd
, reg_rule
);
1714 if (max_bandwidth_khz
< MHZ_TO_KHZ(40))
1715 bw_flags
= IEEE80211_CHAN_NO_HT40
;
1716 if (max_bandwidth_khz
< MHZ_TO_KHZ(80))
1717 bw_flags
|= IEEE80211_CHAN_NO_80MHZ
;
1718 if (max_bandwidth_khz
< MHZ_TO_KHZ(160))
1719 bw_flags
|= IEEE80211_CHAN_NO_160MHZ
;
1721 chan
->dfs_state_entered
= jiffies
;
1722 chan
->dfs_state
= NL80211_DFS_USABLE
;
1724 chan
->beacon_found
= false;
1726 if (wiphy
->regulatory_flags
& REGULATORY_WIPHY_SELF_MANAGED
)
1727 chan
->flags
= chan
->orig_flags
| bw_flags
|
1728 map_regdom_flags(reg_rule
->flags
);
1730 chan
->flags
|= map_regdom_flags(reg_rule
->flags
) | bw_flags
;
1732 chan
->max_antenna_gain
= (int) MBI_TO_DBI(power_rule
->max_antenna_gain
);
1733 chan
->max_reg_power
= chan
->max_power
=
1734 (int) MBM_TO_DBM(power_rule
->max_eirp
);
1736 if (chan
->flags
& IEEE80211_CHAN_RADAR
) {
1737 if (reg_rule
->dfs_cac_ms
)
1738 chan
->dfs_cac_ms
= reg_rule
->dfs_cac_ms
;
1740 chan
->dfs_cac_ms
= IEEE80211_DFS_MIN_CAC_TIME_MS
;
1743 chan
->max_power
= chan
->max_reg_power
;
1746 static void handle_band_custom(struct wiphy
*wiphy
,
1747 struct ieee80211_supported_band
*sband
,
1748 const struct ieee80211_regdomain
*regd
)
1755 for (i
= 0; i
< sband
->n_channels
; i
++)
1756 handle_channel_custom(wiphy
, &sband
->channels
[i
], regd
);
1759 /* Used by drivers prior to wiphy registration */
1760 void wiphy_apply_custom_regulatory(struct wiphy
*wiphy
,
1761 const struct ieee80211_regdomain
*regd
)
1763 enum ieee80211_band band
;
1764 unsigned int bands_set
= 0;
1766 WARN(!(wiphy
->regulatory_flags
& REGULATORY_CUSTOM_REG
),
1767 "wiphy should have REGULATORY_CUSTOM_REG\n");
1768 wiphy
->regulatory_flags
|= REGULATORY_CUSTOM_REG
;
1770 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++) {
1771 if (!wiphy
->bands
[band
])
1773 handle_band_custom(wiphy
, wiphy
->bands
[band
], regd
);
1778 * no point in calling this if it won't have any effect
1779 * on your device's supported bands.
1781 WARN_ON(!bands_set
);
1783 EXPORT_SYMBOL(wiphy_apply_custom_regulatory
);
1785 static void reg_set_request_processed(void)
1787 bool need_more_processing
= false;
1788 struct regulatory_request
*lr
= get_last_request();
1790 lr
->processed
= true;
1792 spin_lock(®_requests_lock
);
1793 if (!list_empty(®_requests_list
))
1794 need_more_processing
= true;
1795 spin_unlock(®_requests_lock
);
1797 cancel_delayed_work(®_timeout
);
1799 if (need_more_processing
)
1800 schedule_work(®_work
);
1804 * reg_process_hint_core - process core regulatory requests
1805 * @pending_request: a pending core regulatory request
1807 * The wireless subsystem can use this function to process
1808 * a regulatory request issued by the regulatory core.
1810 * Returns one of the different reg request treatment values.
1812 static enum reg_request_treatment
1813 reg_process_hint_core(struct regulatory_request
*core_request
)
1816 core_request
->intersect
= false;
1817 core_request
->processed
= false;
1819 reg_update_last_request(core_request
);
1821 return reg_call_crda(core_request
);
1824 static enum reg_request_treatment
1825 __reg_process_hint_user(struct regulatory_request
*user_request
)
1827 struct regulatory_request
*lr
= get_last_request();
1829 if (reg_request_cell_base(user_request
))
1830 return reg_ignore_cell_hint(user_request
);
1832 if (reg_request_cell_base(lr
))
1833 return REG_REQ_IGNORE
;
1835 if (lr
->initiator
== NL80211_REGDOM_SET_BY_COUNTRY_IE
)
1836 return REG_REQ_INTERSECT
;
1838 * If the user knows better the user should set the regdom
1839 * to their country before the IE is picked up
1841 if (lr
->initiator
== NL80211_REGDOM_SET_BY_USER
&&
1843 return REG_REQ_IGNORE
;
1845 * Process user requests only after previous user/driver/core
1846 * requests have been processed
1848 if ((lr
->initiator
== NL80211_REGDOM_SET_BY_CORE
||
1849 lr
->initiator
== NL80211_REGDOM_SET_BY_DRIVER
||
1850 lr
->initiator
== NL80211_REGDOM_SET_BY_USER
) &&
1851 regdom_changes(lr
->alpha2
))
1852 return REG_REQ_IGNORE
;
1854 if (!regdom_changes(user_request
->alpha2
))
1855 return REG_REQ_ALREADY_SET
;
1861 * reg_process_hint_user - process user regulatory requests
1862 * @user_request: a pending user regulatory request
1864 * The wireless subsystem can use this function to process
1865 * a regulatory request initiated by userspace.
1867 * Returns one of the different reg request treatment values.
1869 static enum reg_request_treatment
1870 reg_process_hint_user(struct regulatory_request
*user_request
)
1872 enum reg_request_treatment treatment
;
1874 treatment
= __reg_process_hint_user(user_request
);
1875 if (treatment
== REG_REQ_IGNORE
||
1876 treatment
== REG_REQ_ALREADY_SET
) {
1877 reg_free_request(user_request
);
1881 user_request
->intersect
= treatment
== REG_REQ_INTERSECT
;
1882 user_request
->processed
= false;
1884 reg_update_last_request(user_request
);
1886 user_alpha2
[0] = user_request
->alpha2
[0];
1887 user_alpha2
[1] = user_request
->alpha2
[1];
1889 return reg_call_crda(user_request
);
1892 static enum reg_request_treatment
1893 __reg_process_hint_driver(struct regulatory_request
*driver_request
)
1895 struct regulatory_request
*lr
= get_last_request();
1897 if (lr
->initiator
== NL80211_REGDOM_SET_BY_CORE
) {
1898 if (regdom_changes(driver_request
->alpha2
))
1900 return REG_REQ_ALREADY_SET
;
1904 * This would happen if you unplug and plug your card
1905 * back in or if you add a new device for which the previously
1906 * loaded card also agrees on the regulatory domain.
1908 if (lr
->initiator
== NL80211_REGDOM_SET_BY_DRIVER
&&
1909 !regdom_changes(driver_request
->alpha2
))
1910 return REG_REQ_ALREADY_SET
;
1912 return REG_REQ_INTERSECT
;
1916 * reg_process_hint_driver - process driver regulatory requests
1917 * @driver_request: a pending driver regulatory request
1919 * The wireless subsystem can use this function to process
1920 * a regulatory request issued by an 802.11 driver.
1922 * Returns one of the different reg request treatment values.
1924 static enum reg_request_treatment
1925 reg_process_hint_driver(struct wiphy
*wiphy
,
1926 struct regulatory_request
*driver_request
)
1928 const struct ieee80211_regdomain
*regd
, *tmp
;
1929 enum reg_request_treatment treatment
;
1931 treatment
= __reg_process_hint_driver(driver_request
);
1933 switch (treatment
) {
1936 case REG_REQ_IGNORE
:
1937 reg_free_request(driver_request
);
1939 case REG_REQ_INTERSECT
:
1941 case REG_REQ_ALREADY_SET
:
1942 regd
= reg_copy_regd(get_cfg80211_regdom());
1944 reg_free_request(driver_request
);
1945 return REG_REQ_IGNORE
;
1948 tmp
= get_wiphy_regdom(wiphy
);
1949 rcu_assign_pointer(wiphy
->regd
, regd
);
1950 rcu_free_regdom(tmp
);
1954 driver_request
->intersect
= treatment
== REG_REQ_INTERSECT
;
1955 driver_request
->processed
= false;
1957 reg_update_last_request(driver_request
);
1960 * Since CRDA will not be called in this case as we already
1961 * have applied the requested regulatory domain before we just
1962 * inform userspace we have processed the request
1964 if (treatment
== REG_REQ_ALREADY_SET
) {
1965 nl80211_send_reg_change_event(driver_request
);
1966 reg_set_request_processed();
1970 return reg_call_crda(driver_request
);
1973 static enum reg_request_treatment
1974 __reg_process_hint_country_ie(struct wiphy
*wiphy
,
1975 struct regulatory_request
*country_ie_request
)
1977 struct wiphy
*last_wiphy
= NULL
;
1978 struct regulatory_request
*lr
= get_last_request();
1980 if (reg_request_cell_base(lr
)) {
1981 /* Trust a Cell base station over the AP's country IE */
1982 if (regdom_changes(country_ie_request
->alpha2
))
1983 return REG_REQ_IGNORE
;
1984 return REG_REQ_ALREADY_SET
;
1986 if (wiphy
->regulatory_flags
& REGULATORY_COUNTRY_IE_IGNORE
)
1987 return REG_REQ_IGNORE
;
1990 if (unlikely(!is_an_alpha2(country_ie_request
->alpha2
)))
1993 if (lr
->initiator
!= NL80211_REGDOM_SET_BY_COUNTRY_IE
)
1996 last_wiphy
= wiphy_idx_to_wiphy(lr
->wiphy_idx
);
1998 if (last_wiphy
!= wiphy
) {
2000 * Two cards with two APs claiming different
2001 * Country IE alpha2s. We could
2002 * intersect them, but that seems unlikely
2003 * to be correct. Reject second one for now.
2005 if (regdom_changes(country_ie_request
->alpha2
))
2006 return REG_REQ_IGNORE
;
2007 return REG_REQ_ALREADY_SET
;
2010 if (regdom_changes(country_ie_request
->alpha2
))
2012 return REG_REQ_ALREADY_SET
;
2016 * reg_process_hint_country_ie - process regulatory requests from country IEs
2017 * @country_ie_request: a regulatory request from a country IE
2019 * The wireless subsystem can use this function to process
2020 * a regulatory request issued by a country Information Element.
2022 * Returns one of the different reg request treatment values.
2024 static enum reg_request_treatment
2025 reg_process_hint_country_ie(struct wiphy
*wiphy
,
2026 struct regulatory_request
*country_ie_request
)
2028 enum reg_request_treatment treatment
;
2030 treatment
= __reg_process_hint_country_ie(wiphy
, country_ie_request
);
2032 switch (treatment
) {
2035 case REG_REQ_IGNORE
:
2037 case REG_REQ_ALREADY_SET
:
2038 reg_free_request(country_ie_request
);
2040 case REG_REQ_INTERSECT
:
2041 reg_free_request(country_ie_request
);
2043 * This doesn't happen yet, not sure we
2044 * ever want to support it for this case.
2046 WARN_ONCE(1, "Unexpected intersection for country IEs");
2047 return REG_REQ_IGNORE
;
2050 country_ie_request
->intersect
= false;
2051 country_ie_request
->processed
= false;
2053 reg_update_last_request(country_ie_request
);
2055 return reg_call_crda(country_ie_request
);
2058 /* This processes *all* regulatory hints */
2059 static void reg_process_hint(struct regulatory_request
*reg_request
)
2061 struct wiphy
*wiphy
= NULL
;
2062 enum reg_request_treatment treatment
;
2064 if (reg_request
->wiphy_idx
!= WIPHY_IDX_INVALID
)
2065 wiphy
= wiphy_idx_to_wiphy(reg_request
->wiphy_idx
);
2067 switch (reg_request
->initiator
) {
2068 case NL80211_REGDOM_SET_BY_CORE
:
2069 reg_process_hint_core(reg_request
);
2071 case NL80211_REGDOM_SET_BY_USER
:
2072 treatment
= reg_process_hint_user(reg_request
);
2073 if (treatment
== REG_REQ_IGNORE
||
2074 treatment
== REG_REQ_ALREADY_SET
)
2077 case NL80211_REGDOM_SET_BY_DRIVER
:
2080 treatment
= reg_process_hint_driver(wiphy
, reg_request
);
2082 case NL80211_REGDOM_SET_BY_COUNTRY_IE
:
2085 treatment
= reg_process_hint_country_ie(wiphy
, reg_request
);
2088 WARN(1, "invalid initiator %d\n", reg_request
->initiator
);
2092 /* This is required so that the orig_* parameters are saved */
2093 if (treatment
== REG_REQ_ALREADY_SET
&& wiphy
&&
2094 wiphy
->regulatory_flags
& REGULATORY_STRICT_REG
) {
2095 wiphy_update_regulatory(wiphy
, reg_request
->initiator
);
2096 reg_check_channels();
2102 reg_free_request(reg_request
);
2105 static bool reg_only_self_managed_wiphys(void)
2107 struct cfg80211_registered_device
*rdev
;
2108 struct wiphy
*wiphy
;
2109 bool self_managed_found
= false;
2113 list_for_each_entry(rdev
, &cfg80211_rdev_list
, list
) {
2114 wiphy
= &rdev
->wiphy
;
2115 if (wiphy
->regulatory_flags
& REGULATORY_WIPHY_SELF_MANAGED
)
2116 self_managed_found
= true;
2121 /* make sure at least one self-managed wiphy exists */
2122 return self_managed_found
;
2126 * Processes regulatory hints, this is all the NL80211_REGDOM_SET_BY_*
2127 * Regulatory hints come on a first come first serve basis and we
2128 * must process each one atomically.
2130 static void reg_process_pending_hints(void)
2132 struct regulatory_request
*reg_request
, *lr
;
2134 lr
= get_last_request();
2136 /* When last_request->processed becomes true this will be rescheduled */
2137 if (lr
&& !lr
->processed
) {
2138 reg_process_hint(lr
);
2142 spin_lock(®_requests_lock
);
2144 if (list_empty(®_requests_list
)) {
2145 spin_unlock(®_requests_lock
);
2149 reg_request
= list_first_entry(®_requests_list
,
2150 struct regulatory_request
,
2152 list_del_init(®_request
->list
);
2154 spin_unlock(®_requests_lock
);
2156 if (reg_only_self_managed_wiphys()) {
2157 reg_free_request(reg_request
);
2161 reg_process_hint(reg_request
);
2164 /* Processes beacon hints -- this has nothing to do with country IEs */
2165 static void reg_process_pending_beacon_hints(void)
2167 struct cfg80211_registered_device
*rdev
;
2168 struct reg_beacon
*pending_beacon
, *tmp
;
2170 /* This goes through the _pending_ beacon list */
2171 spin_lock_bh(®_pending_beacons_lock
);
2173 list_for_each_entry_safe(pending_beacon
, tmp
,
2174 ®_pending_beacons
, list
) {
2175 list_del_init(&pending_beacon
->list
);
2177 /* Applies the beacon hint to current wiphys */
2178 list_for_each_entry(rdev
, &cfg80211_rdev_list
, list
)
2179 wiphy_update_new_beacon(&rdev
->wiphy
, pending_beacon
);
2181 /* Remembers the beacon hint for new wiphys or reg changes */
2182 list_add_tail(&pending_beacon
->list
, ®_beacon_list
);
2185 spin_unlock_bh(®_pending_beacons_lock
);
2188 static void reg_process_self_managed_hints(void)
2190 struct cfg80211_registered_device
*rdev
;
2191 struct wiphy
*wiphy
;
2192 const struct ieee80211_regdomain
*tmp
;
2193 const struct ieee80211_regdomain
*regd
;
2194 enum ieee80211_band band
;
2195 struct regulatory_request request
= {};
2197 list_for_each_entry(rdev
, &cfg80211_rdev_list
, list
) {
2198 wiphy
= &rdev
->wiphy
;
2200 spin_lock(®_requests_lock
);
2201 regd
= rdev
->requested_regd
;
2202 rdev
->requested_regd
= NULL
;
2203 spin_unlock(®_requests_lock
);
2208 tmp
= get_wiphy_regdom(wiphy
);
2209 rcu_assign_pointer(wiphy
->regd
, regd
);
2210 rcu_free_regdom(tmp
);
2212 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++)
2213 handle_band_custom(wiphy
, wiphy
->bands
[band
], regd
);
2215 reg_process_ht_flags(wiphy
);
2217 request
.wiphy_idx
= get_wiphy_idx(wiphy
);
2218 request
.alpha2
[0] = regd
->alpha2
[0];
2219 request
.alpha2
[1] = regd
->alpha2
[1];
2220 request
.initiator
= NL80211_REGDOM_SET_BY_DRIVER
;
2222 nl80211_send_wiphy_reg_change_event(&request
);
2225 reg_check_channels();
2228 static void reg_todo(struct work_struct
*work
)
2231 reg_process_pending_hints();
2232 reg_process_pending_beacon_hints();
2233 reg_process_self_managed_hints();
2237 static void queue_regulatory_request(struct regulatory_request
*request
)
2239 request
->alpha2
[0] = toupper(request
->alpha2
[0]);
2240 request
->alpha2
[1] = toupper(request
->alpha2
[1]);
2242 spin_lock(®_requests_lock
);
2243 list_add_tail(&request
->list
, ®_requests_list
);
2244 spin_unlock(®_requests_lock
);
2246 schedule_work(®_work
);
2250 * Core regulatory hint -- happens during cfg80211_init()
2251 * and when we restore regulatory settings.
2253 static int regulatory_hint_core(const char *alpha2
)
2255 struct regulatory_request
*request
;
2257 request
= kzalloc(sizeof(struct regulatory_request
), GFP_KERNEL
);
2261 request
->alpha2
[0] = alpha2
[0];
2262 request
->alpha2
[1] = alpha2
[1];
2263 request
->initiator
= NL80211_REGDOM_SET_BY_CORE
;
2265 queue_regulatory_request(request
);
2271 int regulatory_hint_user(const char *alpha2
,
2272 enum nl80211_user_reg_hint_type user_reg_hint_type
)
2274 struct regulatory_request
*request
;
2276 if (WARN_ON(!alpha2
))
2279 request
= kzalloc(sizeof(struct regulatory_request
), GFP_KERNEL
);
2283 request
->wiphy_idx
= WIPHY_IDX_INVALID
;
2284 request
->alpha2
[0] = alpha2
[0];
2285 request
->alpha2
[1] = alpha2
[1];
2286 request
->initiator
= NL80211_REGDOM_SET_BY_USER
;
2287 request
->user_reg_hint_type
= user_reg_hint_type
;
2289 queue_regulatory_request(request
);
2294 int regulatory_hint_indoor(bool is_indoor
, u32 portid
)
2296 spin_lock(®_indoor_lock
);
2298 /* It is possible that more than one user space process is trying to
2299 * configure the indoor setting. To handle such cases, clear the indoor
2300 * setting in case that some process does not think that the device
2301 * is operating in an indoor environment. In addition, if a user space
2302 * process indicates that it is controlling the indoor setting, save its
2303 * portid, i.e., make it the owner.
2305 reg_is_indoor
= is_indoor
;
2306 if (reg_is_indoor
) {
2307 if (!reg_is_indoor_portid
)
2308 reg_is_indoor_portid
= portid
;
2310 reg_is_indoor_portid
= 0;
2313 spin_unlock(®_indoor_lock
);
2316 reg_check_channels();
2321 void regulatory_netlink_notify(u32 portid
)
2323 spin_lock(®_indoor_lock
);
2325 if (reg_is_indoor_portid
!= portid
) {
2326 spin_unlock(®_indoor_lock
);
2330 reg_is_indoor
= false;
2331 reg_is_indoor_portid
= 0;
2333 spin_unlock(®_indoor_lock
);
2335 reg_check_channels();
2339 int regulatory_hint(struct wiphy
*wiphy
, const char *alpha2
)
2341 struct regulatory_request
*request
;
2343 if (WARN_ON(!alpha2
|| !wiphy
))
2346 wiphy
->regulatory_flags
&= ~REGULATORY_CUSTOM_REG
;
2348 request
= kzalloc(sizeof(struct regulatory_request
), GFP_KERNEL
);
2352 request
->wiphy_idx
= get_wiphy_idx(wiphy
);
2354 request
->alpha2
[0] = alpha2
[0];
2355 request
->alpha2
[1] = alpha2
[1];
2356 request
->initiator
= NL80211_REGDOM_SET_BY_DRIVER
;
2358 queue_regulatory_request(request
);
2362 EXPORT_SYMBOL(regulatory_hint
);
2364 void regulatory_hint_country_ie(struct wiphy
*wiphy
, enum ieee80211_band band
,
2365 const u8
*country_ie
, u8 country_ie_len
)
2368 enum environment_cap env
= ENVIRON_ANY
;
2369 struct regulatory_request
*request
= NULL
, *lr
;
2371 /* IE len must be evenly divisible by 2 */
2372 if (country_ie_len
& 0x01)
2375 if (country_ie_len
< IEEE80211_COUNTRY_IE_MIN_LEN
)
2378 request
= kzalloc(sizeof(*request
), GFP_KERNEL
);
2382 alpha2
[0] = country_ie
[0];
2383 alpha2
[1] = country_ie
[1];
2385 if (country_ie
[2] == 'I')
2386 env
= ENVIRON_INDOOR
;
2387 else if (country_ie
[2] == 'O')
2388 env
= ENVIRON_OUTDOOR
;
2391 lr
= get_last_request();
2397 * We will run this only upon a successful connection on cfg80211.
2398 * We leave conflict resolution to the workqueue, where can hold
2401 if (lr
->initiator
== NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
2402 lr
->wiphy_idx
!= WIPHY_IDX_INVALID
)
2405 request
->wiphy_idx
= get_wiphy_idx(wiphy
);
2406 request
->alpha2
[0] = alpha2
[0];
2407 request
->alpha2
[1] = alpha2
[1];
2408 request
->initiator
= NL80211_REGDOM_SET_BY_COUNTRY_IE
;
2409 request
->country_ie_env
= env
;
2411 queue_regulatory_request(request
);
2418 static void restore_alpha2(char *alpha2
, bool reset_user
)
2420 /* indicates there is no alpha2 to consider for restoration */
2424 /* The user setting has precedence over the module parameter */
2425 if (is_user_regdom_saved()) {
2426 /* Unless we're asked to ignore it and reset it */
2428 REG_DBG_PRINT("Restoring regulatory settings including user preference\n");
2429 user_alpha2
[0] = '9';
2430 user_alpha2
[1] = '7';
2433 * If we're ignoring user settings, we still need to
2434 * check the module parameter to ensure we put things
2435 * back as they were for a full restore.
2437 if (!is_world_regdom(ieee80211_regdom
)) {
2438 REG_DBG_PRINT("Keeping preference on module parameter ieee80211_regdom: %c%c\n",
2439 ieee80211_regdom
[0], ieee80211_regdom
[1]);
2440 alpha2
[0] = ieee80211_regdom
[0];
2441 alpha2
[1] = ieee80211_regdom
[1];
2444 REG_DBG_PRINT("Restoring regulatory settings while preserving user preference for: %c%c\n",
2445 user_alpha2
[0], user_alpha2
[1]);
2446 alpha2
[0] = user_alpha2
[0];
2447 alpha2
[1] = user_alpha2
[1];
2449 } else if (!is_world_regdom(ieee80211_regdom
)) {
2450 REG_DBG_PRINT("Keeping preference on module parameter ieee80211_regdom: %c%c\n",
2451 ieee80211_regdom
[0], ieee80211_regdom
[1]);
2452 alpha2
[0] = ieee80211_regdom
[0];
2453 alpha2
[1] = ieee80211_regdom
[1];
2455 REG_DBG_PRINT("Restoring regulatory settings\n");
2458 static void restore_custom_reg_settings(struct wiphy
*wiphy
)
2460 struct ieee80211_supported_band
*sband
;
2461 enum ieee80211_band band
;
2462 struct ieee80211_channel
*chan
;
2465 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++) {
2466 sband
= wiphy
->bands
[band
];
2469 for (i
= 0; i
< sband
->n_channels
; i
++) {
2470 chan
= &sband
->channels
[i
];
2471 chan
->flags
= chan
->orig_flags
;
2472 chan
->max_antenna_gain
= chan
->orig_mag
;
2473 chan
->max_power
= chan
->orig_mpwr
;
2474 chan
->beacon_found
= false;
2480 * Restoring regulatory settings involves ingoring any
2481 * possibly stale country IE information and user regulatory
2482 * settings if so desired, this includes any beacon hints
2483 * learned as we could have traveled outside to another country
2484 * after disconnection. To restore regulatory settings we do
2485 * exactly what we did at bootup:
2487 * - send a core regulatory hint
2488 * - send a user regulatory hint if applicable
2490 * Device drivers that send a regulatory hint for a specific country
2491 * keep their own regulatory domain on wiphy->regd so that does does
2492 * not need to be remembered.
2494 static void restore_regulatory_settings(bool reset_user
)
2497 char world_alpha2
[2];
2498 struct reg_beacon
*reg_beacon
, *btmp
;
2499 LIST_HEAD(tmp_reg_req_list
);
2500 struct cfg80211_registered_device
*rdev
;
2505 * Clear the indoor setting in case that it is not controlled by user
2506 * space, as otherwise there is no guarantee that the device is still
2507 * operating in an indoor environment.
2509 spin_lock(®_indoor_lock
);
2510 if (reg_is_indoor
&& !reg_is_indoor_portid
) {
2511 reg_is_indoor
= false;
2512 reg_check_channels();
2514 spin_unlock(®_indoor_lock
);
2516 reset_regdomains(true, &world_regdom
);
2517 restore_alpha2(alpha2
, reset_user
);
2520 * If there's any pending requests we simply
2521 * stash them to a temporary pending queue and
2522 * add then after we've restored regulatory
2525 spin_lock(®_requests_lock
);
2526 list_splice_tail_init(®_requests_list
, &tmp_reg_req_list
);
2527 spin_unlock(®_requests_lock
);
2529 /* Clear beacon hints */
2530 spin_lock_bh(®_pending_beacons_lock
);
2531 list_for_each_entry_safe(reg_beacon
, btmp
, ®_pending_beacons
, list
) {
2532 list_del(®_beacon
->list
);
2535 spin_unlock_bh(®_pending_beacons_lock
);
2537 list_for_each_entry_safe(reg_beacon
, btmp
, ®_beacon_list
, list
) {
2538 list_del(®_beacon
->list
);
2542 /* First restore to the basic regulatory settings */
2543 world_alpha2
[0] = cfg80211_world_regdom
->alpha2
[0];
2544 world_alpha2
[1] = cfg80211_world_regdom
->alpha2
[1];
2546 list_for_each_entry(rdev
, &cfg80211_rdev_list
, list
) {
2547 if (rdev
->wiphy
.regulatory_flags
& REGULATORY_WIPHY_SELF_MANAGED
)
2549 if (rdev
->wiphy
.regulatory_flags
& REGULATORY_CUSTOM_REG
)
2550 restore_custom_reg_settings(&rdev
->wiphy
);
2553 regulatory_hint_core(world_alpha2
);
2556 * This restores the ieee80211_regdom module parameter
2557 * preference or the last user requested regulatory
2558 * settings, user regulatory settings takes precedence.
2560 if (is_an_alpha2(alpha2
))
2561 regulatory_hint_user(user_alpha2
, NL80211_USER_REG_HINT_USER
);
2563 spin_lock(®_requests_lock
);
2564 list_splice_tail_init(&tmp_reg_req_list
, ®_requests_list
);
2565 spin_unlock(®_requests_lock
);
2567 REG_DBG_PRINT("Kicking the queue\n");
2569 schedule_work(®_work
);
2572 void regulatory_hint_disconnect(void)
2574 REG_DBG_PRINT("All devices are disconnected, going to restore regulatory settings\n");
2575 restore_regulatory_settings(false);
2578 static bool freq_is_chan_12_13_14(u16 freq
)
2580 if (freq
== ieee80211_channel_to_frequency(12, IEEE80211_BAND_2GHZ
) ||
2581 freq
== ieee80211_channel_to_frequency(13, IEEE80211_BAND_2GHZ
) ||
2582 freq
== ieee80211_channel_to_frequency(14, IEEE80211_BAND_2GHZ
))
2587 static bool pending_reg_beacon(struct ieee80211_channel
*beacon_chan
)
2589 struct reg_beacon
*pending_beacon
;
2591 list_for_each_entry(pending_beacon
, ®_pending_beacons
, list
)
2592 if (beacon_chan
->center_freq
==
2593 pending_beacon
->chan
.center_freq
)
2598 int regulatory_hint_found_beacon(struct wiphy
*wiphy
,
2599 struct ieee80211_channel
*beacon_chan
,
2602 struct reg_beacon
*reg_beacon
;
2605 if (beacon_chan
->beacon_found
||
2606 beacon_chan
->flags
& IEEE80211_CHAN_RADAR
||
2607 (beacon_chan
->band
== IEEE80211_BAND_2GHZ
&&
2608 !freq_is_chan_12_13_14(beacon_chan
->center_freq
)))
2611 spin_lock_bh(®_pending_beacons_lock
);
2612 processing
= pending_reg_beacon(beacon_chan
);
2613 spin_unlock_bh(®_pending_beacons_lock
);
2618 reg_beacon
= kzalloc(sizeof(struct reg_beacon
), gfp
);
2622 REG_DBG_PRINT("Found new beacon on frequency: %d MHz (Ch %d) on %s\n",
2623 beacon_chan
->center_freq
,
2624 ieee80211_frequency_to_channel(beacon_chan
->center_freq
),
2627 memcpy(®_beacon
->chan
, beacon_chan
,
2628 sizeof(struct ieee80211_channel
));
2631 * Since we can be called from BH or and non-BH context
2632 * we must use spin_lock_bh()
2634 spin_lock_bh(®_pending_beacons_lock
);
2635 list_add_tail(®_beacon
->list
, ®_pending_beacons
);
2636 spin_unlock_bh(®_pending_beacons_lock
);
2638 schedule_work(®_work
);
2643 static void print_rd_rules(const struct ieee80211_regdomain
*rd
)
2646 const struct ieee80211_reg_rule
*reg_rule
= NULL
;
2647 const struct ieee80211_freq_range
*freq_range
= NULL
;
2648 const struct ieee80211_power_rule
*power_rule
= NULL
;
2649 char bw
[32], cac_time
[32];
2651 pr_info(" (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp), (dfs_cac_time)\n");
2653 for (i
= 0; i
< rd
->n_reg_rules
; i
++) {
2654 reg_rule
= &rd
->reg_rules
[i
];
2655 freq_range
= ®_rule
->freq_range
;
2656 power_rule
= ®_rule
->power_rule
;
2658 if (reg_rule
->flags
& NL80211_RRF_AUTO_BW
)
2659 snprintf(bw
, sizeof(bw
), "%d KHz, %d KHz AUTO",
2660 freq_range
->max_bandwidth_khz
,
2661 reg_get_max_bandwidth(rd
, reg_rule
));
2663 snprintf(bw
, sizeof(bw
), "%d KHz",
2664 freq_range
->max_bandwidth_khz
);
2666 if (reg_rule
->flags
& NL80211_RRF_DFS
)
2667 scnprintf(cac_time
, sizeof(cac_time
), "%u s",
2668 reg_rule
->dfs_cac_ms
/1000);
2670 scnprintf(cac_time
, sizeof(cac_time
), "N/A");
2674 * There may not be documentation for max antenna gain
2675 * in certain regions
2677 if (power_rule
->max_antenna_gain
)
2678 pr_info(" (%d KHz - %d KHz @ %s), (%d mBi, %d mBm), (%s)\n",
2679 freq_range
->start_freq_khz
,
2680 freq_range
->end_freq_khz
,
2682 power_rule
->max_antenna_gain
,
2683 power_rule
->max_eirp
,
2686 pr_info(" (%d KHz - %d KHz @ %s), (N/A, %d mBm), (%s)\n",
2687 freq_range
->start_freq_khz
,
2688 freq_range
->end_freq_khz
,
2690 power_rule
->max_eirp
,
2695 bool reg_supported_dfs_region(enum nl80211_dfs_regions dfs_region
)
2697 switch (dfs_region
) {
2698 case NL80211_DFS_UNSET
:
2699 case NL80211_DFS_FCC
:
2700 case NL80211_DFS_ETSI
:
2701 case NL80211_DFS_JP
:
2704 REG_DBG_PRINT("Ignoring uknown DFS master region: %d\n",
2710 static void print_regdomain(const struct ieee80211_regdomain
*rd
)
2712 struct regulatory_request
*lr
= get_last_request();
2714 if (is_intersected_alpha2(rd
->alpha2
)) {
2715 if (lr
->initiator
== NL80211_REGDOM_SET_BY_COUNTRY_IE
) {
2716 struct cfg80211_registered_device
*rdev
;
2717 rdev
= cfg80211_rdev_by_wiphy_idx(lr
->wiphy_idx
);
2719 pr_info("Current regulatory domain updated by AP to: %c%c\n",
2720 rdev
->country_ie_alpha2
[0],
2721 rdev
->country_ie_alpha2
[1]);
2723 pr_info("Current regulatory domain intersected:\n");
2725 pr_info("Current regulatory domain intersected:\n");
2726 } else if (is_world_regdom(rd
->alpha2
)) {
2727 pr_info("World regulatory domain updated:\n");
2729 if (is_unknown_alpha2(rd
->alpha2
))
2730 pr_info("Regulatory domain changed to driver built-in settings (unknown country)\n");
2732 if (reg_request_cell_base(lr
))
2733 pr_info("Regulatory domain changed to country: %c%c by Cell Station\n",
2734 rd
->alpha2
[0], rd
->alpha2
[1]);
2736 pr_info("Regulatory domain changed to country: %c%c\n",
2737 rd
->alpha2
[0], rd
->alpha2
[1]);
2741 pr_info(" DFS Master region: %s", reg_dfs_region_str(rd
->dfs_region
));
2745 static void print_regdomain_info(const struct ieee80211_regdomain
*rd
)
2747 pr_info("Regulatory domain: %c%c\n", rd
->alpha2
[0], rd
->alpha2
[1]);
2751 static int reg_set_rd_core(const struct ieee80211_regdomain
*rd
)
2753 if (!is_world_regdom(rd
->alpha2
))
2755 update_world_regdomain(rd
);
2759 static int reg_set_rd_user(const struct ieee80211_regdomain
*rd
,
2760 struct regulatory_request
*user_request
)
2762 const struct ieee80211_regdomain
*intersected_rd
= NULL
;
2764 if (!regdom_changes(rd
->alpha2
))
2767 if (!is_valid_rd(rd
)) {
2768 pr_err("Invalid regulatory domain detected:\n");
2769 print_regdomain_info(rd
);
2773 if (!user_request
->intersect
) {
2774 reset_regdomains(false, rd
);
2778 intersected_rd
= regdom_intersect(rd
, get_cfg80211_regdom());
2779 if (!intersected_rd
)
2784 reset_regdomains(false, intersected_rd
);
2789 static int reg_set_rd_driver(const struct ieee80211_regdomain
*rd
,
2790 struct regulatory_request
*driver_request
)
2792 const struct ieee80211_regdomain
*regd
;
2793 const struct ieee80211_regdomain
*intersected_rd
= NULL
;
2794 const struct ieee80211_regdomain
*tmp
;
2795 struct wiphy
*request_wiphy
;
2797 if (is_world_regdom(rd
->alpha2
))
2800 if (!regdom_changes(rd
->alpha2
))
2803 if (!is_valid_rd(rd
)) {
2804 pr_err("Invalid regulatory domain detected:\n");
2805 print_regdomain_info(rd
);
2809 request_wiphy
= wiphy_idx_to_wiphy(driver_request
->wiphy_idx
);
2810 if (!request_wiphy
) {
2811 queue_delayed_work(system_power_efficient_wq
,
2816 if (!driver_request
->intersect
) {
2817 if (request_wiphy
->regd
)
2820 regd
= reg_copy_regd(rd
);
2822 return PTR_ERR(regd
);
2824 rcu_assign_pointer(request_wiphy
->regd
, regd
);
2825 reset_regdomains(false, rd
);
2829 intersected_rd
= regdom_intersect(rd
, get_cfg80211_regdom());
2830 if (!intersected_rd
)
2834 * We can trash what CRDA provided now.
2835 * However if a driver requested this specific regulatory
2836 * domain we keep it for its private use
2838 tmp
= get_wiphy_regdom(request_wiphy
);
2839 rcu_assign_pointer(request_wiphy
->regd
, rd
);
2840 rcu_free_regdom(tmp
);
2844 reset_regdomains(false, intersected_rd
);
2849 static int reg_set_rd_country_ie(const struct ieee80211_regdomain
*rd
,
2850 struct regulatory_request
*country_ie_request
)
2852 struct wiphy
*request_wiphy
;
2854 if (!is_alpha2_set(rd
->alpha2
) && !is_an_alpha2(rd
->alpha2
) &&
2855 !is_unknown_alpha2(rd
->alpha2
))
2859 * Lets only bother proceeding on the same alpha2 if the current
2860 * rd is non static (it means CRDA was present and was used last)
2861 * and the pending request came in from a country IE
2864 if (!is_valid_rd(rd
)) {
2865 pr_err("Invalid regulatory domain detected:\n");
2866 print_regdomain_info(rd
);
2870 request_wiphy
= wiphy_idx_to_wiphy(country_ie_request
->wiphy_idx
);
2871 if (!request_wiphy
) {
2872 queue_delayed_work(system_power_efficient_wq
,
2877 if (country_ie_request
->intersect
)
2880 reset_regdomains(false, rd
);
2885 * Use this call to set the current regulatory domain. Conflicts with
2886 * multiple drivers can be ironed out later. Caller must've already
2887 * kmalloc'd the rd structure.
2889 int set_regdom(const struct ieee80211_regdomain
*rd
)
2891 struct regulatory_request
*lr
;
2892 bool user_reset
= false;
2895 if (!reg_is_valid_request(rd
->alpha2
)) {
2900 lr
= get_last_request();
2902 /* Note that this doesn't update the wiphys, this is done below */
2903 switch (lr
->initiator
) {
2904 case NL80211_REGDOM_SET_BY_CORE
:
2905 r
= reg_set_rd_core(rd
);
2907 case NL80211_REGDOM_SET_BY_USER
:
2908 r
= reg_set_rd_user(rd
, lr
);
2911 case NL80211_REGDOM_SET_BY_DRIVER
:
2912 r
= reg_set_rd_driver(rd
, lr
);
2914 case NL80211_REGDOM_SET_BY_COUNTRY_IE
:
2915 r
= reg_set_rd_country_ie(rd
, lr
);
2918 WARN(1, "invalid initiator %d\n", lr
->initiator
);
2925 reg_set_request_processed();
2928 /* Back to world regulatory in case of errors */
2929 restore_regulatory_settings(user_reset
);
2936 /* This would make this whole thing pointless */
2937 if (WARN_ON(!lr
->intersect
&& rd
!= get_cfg80211_regdom()))
2940 /* update all wiphys now with the new established regulatory domain */
2941 update_all_wiphy_regulatory(lr
->initiator
);
2943 print_regdomain(get_cfg80211_regdom());
2945 nl80211_send_reg_change_event(lr
);
2947 reg_set_request_processed();
2952 static int __regulatory_set_wiphy_regd(struct wiphy
*wiphy
,
2953 struct ieee80211_regdomain
*rd
)
2955 const struct ieee80211_regdomain
*regd
;
2956 const struct ieee80211_regdomain
*prev_regd
;
2957 struct cfg80211_registered_device
*rdev
;
2959 if (WARN_ON(!wiphy
|| !rd
))
2962 if (WARN(!(wiphy
->regulatory_flags
& REGULATORY_WIPHY_SELF_MANAGED
),
2963 "wiphy should have REGULATORY_WIPHY_SELF_MANAGED\n"))
2966 if (WARN(!is_valid_rd(rd
), "Invalid regulatory domain detected\n")) {
2967 print_regdomain_info(rd
);
2971 regd
= reg_copy_regd(rd
);
2973 return PTR_ERR(regd
);
2975 rdev
= wiphy_to_rdev(wiphy
);
2977 spin_lock(®_requests_lock
);
2978 prev_regd
= rdev
->requested_regd
;
2979 rdev
->requested_regd
= regd
;
2980 spin_unlock(®_requests_lock
);
2986 int regulatory_set_wiphy_regd(struct wiphy
*wiphy
,
2987 struct ieee80211_regdomain
*rd
)
2989 int ret
= __regulatory_set_wiphy_regd(wiphy
, rd
);
2994 schedule_work(®_work
);
2997 EXPORT_SYMBOL(regulatory_set_wiphy_regd
);
2999 int regulatory_set_wiphy_regd_sync_rtnl(struct wiphy
*wiphy
,
3000 struct ieee80211_regdomain
*rd
)
3006 ret
= __regulatory_set_wiphy_regd(wiphy
, rd
);
3010 /* process the request immediately */
3011 reg_process_self_managed_hints();
3014 EXPORT_SYMBOL(regulatory_set_wiphy_regd_sync_rtnl
);
3016 void wiphy_regulatory_register(struct wiphy
*wiphy
)
3018 struct regulatory_request
*lr
;
3020 /* self-managed devices ignore external hints */
3021 if (wiphy
->regulatory_flags
& REGULATORY_WIPHY_SELF_MANAGED
)
3022 wiphy
->regulatory_flags
|= REGULATORY_DISABLE_BEACON_HINTS
|
3023 REGULATORY_COUNTRY_IE_IGNORE
;
3025 if (!reg_dev_ignore_cell_hint(wiphy
))
3026 reg_num_devs_support_basehint
++;
3028 lr
= get_last_request();
3029 wiphy_update_regulatory(wiphy
, lr
->initiator
);
3032 void wiphy_regulatory_deregister(struct wiphy
*wiphy
)
3034 struct wiphy
*request_wiphy
= NULL
;
3035 struct regulatory_request
*lr
;
3037 lr
= get_last_request();
3039 if (!reg_dev_ignore_cell_hint(wiphy
))
3040 reg_num_devs_support_basehint
--;
3042 rcu_free_regdom(get_wiphy_regdom(wiphy
));
3043 RCU_INIT_POINTER(wiphy
->regd
, NULL
);
3046 request_wiphy
= wiphy_idx_to_wiphy(lr
->wiphy_idx
);
3048 if (!request_wiphy
|| request_wiphy
!= wiphy
)
3051 lr
->wiphy_idx
= WIPHY_IDX_INVALID
;
3052 lr
->country_ie_env
= ENVIRON_ANY
;
3055 static void reg_timeout_work(struct work_struct
*work
)
3057 REG_DBG_PRINT("Timeout while waiting for CRDA to reply, restoring regulatory settings\n");
3059 restore_regulatory_settings(true);
3064 * See http://www.fcc.gov/document/5-ghz-unlicensed-spectrum-unii, for
3065 * UNII band definitions
3067 int cfg80211_get_unii(int freq
)
3070 if (freq
>= 5150 && freq
<= 5250)
3074 if (freq
> 5250 && freq
<= 5350)
3078 if (freq
> 5350 && freq
<= 5470)
3082 if (freq
> 5470 && freq
<= 5725)
3086 if (freq
> 5725 && freq
<= 5825)
3092 bool regulatory_indoor_allowed(void)
3094 return reg_is_indoor
;
3097 int __init
regulatory_init(void)
3101 reg_pdev
= platform_device_register_simple("regulatory", 0, NULL
, 0);
3102 if (IS_ERR(reg_pdev
))
3103 return PTR_ERR(reg_pdev
);
3105 spin_lock_init(®_requests_lock
);
3106 spin_lock_init(®_pending_beacons_lock
);
3107 spin_lock_init(®_indoor_lock
);
3109 reg_regdb_size_check();
3111 rcu_assign_pointer(cfg80211_regdomain
, cfg80211_world_regdom
);
3113 user_alpha2
[0] = '9';
3114 user_alpha2
[1] = '7';
3116 /* We always try to get an update for the static regdomain */
3117 err
= regulatory_hint_core(cfg80211_world_regdom
->alpha2
);
3122 * N.B. kobject_uevent_env() can fail mainly for when we're out
3123 * memory which is handled and propagated appropriately above
3124 * but it can also fail during a netlink_broadcast() or during
3125 * early boot for call_usermodehelper(). For now treat these
3126 * errors as non-fatal.
3128 pr_err("kobject_uevent_env() was unable to call CRDA during init\n");
3132 * Finally, if the user set the module parameter treat it
3135 if (!is_world_regdom(ieee80211_regdom
))
3136 regulatory_hint_user(ieee80211_regdom
,
3137 NL80211_USER_REG_HINT_USER
);
3142 void regulatory_exit(void)
3144 struct regulatory_request
*reg_request
, *tmp
;
3145 struct reg_beacon
*reg_beacon
, *btmp
;
3147 cancel_work_sync(®_work
);
3148 cancel_delayed_work_sync(®_timeout
);
3149 cancel_delayed_work_sync(®_check_chans
);
3151 /* Lock to suppress warnings */
3153 reset_regdomains(true, NULL
);
3156 dev_set_uevent_suppress(®_pdev
->dev
, true);
3158 platform_device_unregister(reg_pdev
);
3160 list_for_each_entry_safe(reg_beacon
, btmp
, ®_pending_beacons
, list
) {
3161 list_del(®_beacon
->list
);
3165 list_for_each_entry_safe(reg_beacon
, btmp
, ®_beacon_list
, list
) {
3166 list_del(®_beacon
->list
);
3170 list_for_each_entry_safe(reg_request
, tmp
, ®_requests_list
, list
) {
3171 list_del(®_request
->list
);