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 /* Max number of consecutive attempts to communicate with CRDA */
139 #define REG_MAX_CRDA_TIMEOUTS 10
141 static u32 reg_crda_timeouts
;
143 static const struct ieee80211_regdomain
*get_cfg80211_regdom(void)
145 return rtnl_dereference(cfg80211_regdomain
);
148 const struct ieee80211_regdomain
*get_wiphy_regdom(struct wiphy
*wiphy
)
150 return rtnl_dereference(wiphy
->regd
);
153 static const char *reg_dfs_region_str(enum nl80211_dfs_regions dfs_region
)
155 switch (dfs_region
) {
156 case NL80211_DFS_UNSET
:
158 case NL80211_DFS_FCC
:
160 case NL80211_DFS_ETSI
:
168 enum nl80211_dfs_regions
reg_get_dfs_region(struct wiphy
*wiphy
)
170 const struct ieee80211_regdomain
*regd
= NULL
;
171 const struct ieee80211_regdomain
*wiphy_regd
= NULL
;
173 regd
= get_cfg80211_regdom();
177 wiphy_regd
= get_wiphy_regdom(wiphy
);
181 if (wiphy_regd
->dfs_region
== regd
->dfs_region
)
184 REG_DBG_PRINT("%s: device specific dfs_region "
185 "(%s) disagrees with cfg80211's "
186 "central dfs_region (%s)\n",
187 dev_name(&wiphy
->dev
),
188 reg_dfs_region_str(wiphy_regd
->dfs_region
),
189 reg_dfs_region_str(regd
->dfs_region
));
192 return regd
->dfs_region
;
195 static void rcu_free_regdom(const struct ieee80211_regdomain
*r
)
199 kfree_rcu((struct ieee80211_regdomain
*)r
, rcu_head
);
202 static struct regulatory_request
*get_last_request(void)
204 return rcu_dereference_rtnl(last_request
);
207 /* Used to queue up regulatory hints */
208 static LIST_HEAD(reg_requests_list
);
209 static spinlock_t reg_requests_lock
;
211 /* Used to queue up beacon hints for review */
212 static LIST_HEAD(reg_pending_beacons
);
213 static spinlock_t reg_pending_beacons_lock
;
215 /* Used to keep track of processed beacon hints */
216 static LIST_HEAD(reg_beacon_list
);
219 struct list_head list
;
220 struct ieee80211_channel chan
;
223 static void reg_check_chans_work(struct work_struct
*work
);
224 static DECLARE_DELAYED_WORK(reg_check_chans
, reg_check_chans_work
);
226 static void reg_todo(struct work_struct
*work
);
227 static DECLARE_WORK(reg_work
, reg_todo
);
229 static void reg_timeout_work(struct work_struct
*work
);
230 static DECLARE_DELAYED_WORK(reg_timeout
, reg_timeout_work
);
232 /* We keep a static world regulatory domain in case of the absence of CRDA */
233 static const struct ieee80211_regdomain world_regdom
= {
237 /* IEEE 802.11b/g, channels 1..11 */
238 REG_RULE(2412-10, 2462+10, 40, 6, 20, 0),
239 /* IEEE 802.11b/g, channels 12..13. */
240 REG_RULE(2467-10, 2472+10, 40, 6, 20,
242 /* IEEE 802.11 channel 14 - Only JP enables
243 * this and for 802.11b only */
244 REG_RULE(2484-10, 2484+10, 20, 6, 20,
246 NL80211_RRF_NO_OFDM
),
247 /* IEEE 802.11a, channel 36..48 */
248 REG_RULE(5180-10, 5240+10, 160, 6, 20,
251 /* IEEE 802.11a, channel 52..64 - DFS required */
252 REG_RULE(5260-10, 5320+10, 160, 6, 20,
256 /* IEEE 802.11a, channel 100..144 - DFS required */
257 REG_RULE(5500-10, 5720+10, 160, 6, 20,
261 /* IEEE 802.11a, channel 149..165 */
262 REG_RULE(5745-10, 5825+10, 80, 6, 20,
265 /* IEEE 802.11ad (60GHz), channels 1..3 */
266 REG_RULE(56160+2160*1-1080, 56160+2160*3+1080, 2160, 0, 0, 0),
270 /* protected by RTNL */
271 static const struct ieee80211_regdomain
*cfg80211_world_regdom
=
274 static char *ieee80211_regdom
= "00";
275 static char user_alpha2
[2];
277 module_param(ieee80211_regdom
, charp
, 0444);
278 MODULE_PARM_DESC(ieee80211_regdom
, "IEEE 802.11 regulatory domain code");
280 static void reg_free_request(struct regulatory_request
*request
)
282 if (request
!= get_last_request())
286 static void reg_free_last_request(void)
288 struct regulatory_request
*lr
= get_last_request();
290 if (lr
!= &core_request_world
&& lr
)
291 kfree_rcu(lr
, rcu_head
);
294 static void reg_update_last_request(struct regulatory_request
*request
)
296 struct regulatory_request
*lr
;
298 lr
= get_last_request();
302 reg_free_last_request();
303 rcu_assign_pointer(last_request
, request
);
306 static void reset_regdomains(bool full_reset
,
307 const struct ieee80211_regdomain
*new_regdom
)
309 const struct ieee80211_regdomain
*r
;
313 r
= get_cfg80211_regdom();
315 /* avoid freeing static information or freeing something twice */
316 if (r
== cfg80211_world_regdom
)
318 if (cfg80211_world_regdom
== &world_regdom
)
319 cfg80211_world_regdom
= NULL
;
320 if (r
== &world_regdom
)
324 rcu_free_regdom(cfg80211_world_regdom
);
326 cfg80211_world_regdom
= &world_regdom
;
327 rcu_assign_pointer(cfg80211_regdomain
, new_regdom
);
332 reg_update_last_request(&core_request_world
);
336 * Dynamic world regulatory domain requested by the wireless
337 * core upon initialization
339 static void update_world_regdomain(const struct ieee80211_regdomain
*rd
)
341 struct regulatory_request
*lr
;
343 lr
= get_last_request();
347 reset_regdomains(false, rd
);
349 cfg80211_world_regdom
= rd
;
352 bool is_world_regdom(const char *alpha2
)
356 return alpha2
[0] == '0' && alpha2
[1] == '0';
359 static bool is_alpha2_set(const char *alpha2
)
363 return alpha2
[0] && alpha2
[1];
366 static bool is_unknown_alpha2(const char *alpha2
)
371 * Special case where regulatory domain was built by driver
372 * but a specific alpha2 cannot be determined
374 return alpha2
[0] == '9' && alpha2
[1] == '9';
377 static bool is_intersected_alpha2(const char *alpha2
)
382 * Special case where regulatory domain is the
383 * result of an intersection between two regulatory domain
386 return alpha2
[0] == '9' && alpha2
[1] == '8';
389 static bool is_an_alpha2(const char *alpha2
)
393 return isalpha(alpha2
[0]) && isalpha(alpha2
[1]);
396 static bool alpha2_equal(const char *alpha2_x
, const char *alpha2_y
)
398 if (!alpha2_x
|| !alpha2_y
)
400 return alpha2_x
[0] == alpha2_y
[0] && alpha2_x
[1] == alpha2_y
[1];
403 static bool regdom_changes(const char *alpha2
)
405 const struct ieee80211_regdomain
*r
= get_cfg80211_regdom();
409 return !alpha2_equal(r
->alpha2
, alpha2
);
413 * The NL80211_REGDOM_SET_BY_USER regdom alpha2 is cached, this lets
414 * you know if a valid regulatory hint with NL80211_REGDOM_SET_BY_USER
415 * has ever been issued.
417 static bool is_user_regdom_saved(void)
419 if (user_alpha2
[0] == '9' && user_alpha2
[1] == '7')
422 /* This would indicate a mistake on the design */
423 if (WARN(!is_world_regdom(user_alpha2
) && !is_an_alpha2(user_alpha2
),
424 "Unexpected user alpha2: %c%c\n",
425 user_alpha2
[0], user_alpha2
[1]))
431 static const struct ieee80211_regdomain
*
432 reg_copy_regd(const struct ieee80211_regdomain
*src_regd
)
434 struct ieee80211_regdomain
*regd
;
439 sizeof(struct ieee80211_regdomain
) +
440 src_regd
->n_reg_rules
* sizeof(struct ieee80211_reg_rule
);
442 regd
= kzalloc(size_of_regd
, GFP_KERNEL
);
444 return ERR_PTR(-ENOMEM
);
446 memcpy(regd
, src_regd
, sizeof(struct ieee80211_regdomain
));
448 for (i
= 0; i
< src_regd
->n_reg_rules
; i
++)
449 memcpy(®d
->reg_rules
[i
], &src_regd
->reg_rules
[i
],
450 sizeof(struct ieee80211_reg_rule
));
455 #ifdef CONFIG_CFG80211_INTERNAL_REGDB
456 struct reg_regdb_search_request
{
458 struct list_head list
;
461 static LIST_HEAD(reg_regdb_search_list
);
462 static DEFINE_MUTEX(reg_regdb_search_mutex
);
464 static void reg_regdb_search(struct work_struct
*work
)
466 struct reg_regdb_search_request
*request
;
467 const struct ieee80211_regdomain
*curdom
, *regdom
= NULL
;
472 mutex_lock(®_regdb_search_mutex
);
473 while (!list_empty(®_regdb_search_list
)) {
474 request
= list_first_entry(®_regdb_search_list
,
475 struct reg_regdb_search_request
,
477 list_del(&request
->list
);
479 for (i
= 0; i
< reg_regdb_size
; i
++) {
480 curdom
= reg_regdb
[i
];
482 if (alpha2_equal(request
->alpha2
, curdom
->alpha2
)) {
483 regdom
= reg_copy_regd(curdom
);
490 mutex_unlock(®_regdb_search_mutex
);
492 if (!IS_ERR_OR_NULL(regdom
))
493 set_regdom(regdom
, REGD_SOURCE_INTERNAL_DB
);
498 static DECLARE_WORK(reg_regdb_work
, reg_regdb_search
);
500 static void reg_regdb_query(const char *alpha2
)
502 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 /* query internal regulatory database (if it exists) */
541 reg_regdb_query(alpha2
);
543 if (reg_crda_timeouts
> REG_MAX_CRDA_TIMEOUTS
) {
544 pr_debug("Exceeded CRDA call max attempts. Not calling CRDA\n");
548 if (!is_world_regdom((char *) alpha2
))
549 pr_debug("Calling CRDA for country: %c%c\n",
550 alpha2
[0], alpha2
[1]);
552 pr_debug("Calling CRDA to update world regulatory domain\n");
554 return kobject_uevent_env(®_pdev
->dev
.kobj
, KOBJ_CHANGE
, env
);
557 static bool reg_call_crda(struct regulatory_request
*request
)
559 if (call_crda(request
->alpha2
))
562 queue_delayed_work(system_power_efficient_wq
,
563 ®_timeout
, msecs_to_jiffies(3142));
567 bool reg_is_valid_request(const char *alpha2
)
569 struct regulatory_request
*lr
= get_last_request();
571 if (!lr
|| lr
->processed
)
574 return alpha2_equal(lr
->alpha2
, alpha2
);
577 static const struct ieee80211_regdomain
*reg_get_regdomain(struct wiphy
*wiphy
)
579 struct regulatory_request
*lr
= get_last_request();
582 * Follow the driver's regulatory domain, if present, unless a country
583 * IE has been processed or a user wants to help complaince further
585 if (lr
->initiator
!= NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
586 lr
->initiator
!= NL80211_REGDOM_SET_BY_USER
&&
588 return get_wiphy_regdom(wiphy
);
590 return get_cfg80211_regdom();
594 reg_get_max_bandwidth_from_range(const struct ieee80211_regdomain
*rd
,
595 const struct ieee80211_reg_rule
*rule
)
597 const struct ieee80211_freq_range
*freq_range
= &rule
->freq_range
;
598 const struct ieee80211_freq_range
*freq_range_tmp
;
599 const struct ieee80211_reg_rule
*tmp
;
600 u32 start_freq
, end_freq
, idx
, no
;
602 for (idx
= 0; idx
< rd
->n_reg_rules
; idx
++)
603 if (rule
== &rd
->reg_rules
[idx
])
606 if (idx
== rd
->n_reg_rules
)
613 tmp
= &rd
->reg_rules
[--no
];
614 freq_range_tmp
= &tmp
->freq_range
;
616 if (freq_range_tmp
->end_freq_khz
< freq_range
->start_freq_khz
)
619 freq_range
= freq_range_tmp
;
622 start_freq
= freq_range
->start_freq_khz
;
625 freq_range
= &rule
->freq_range
;
628 while (no
< rd
->n_reg_rules
- 1) {
629 tmp
= &rd
->reg_rules
[++no
];
630 freq_range_tmp
= &tmp
->freq_range
;
632 if (freq_range_tmp
->start_freq_khz
> freq_range
->end_freq_khz
)
635 freq_range
= freq_range_tmp
;
638 end_freq
= freq_range
->end_freq_khz
;
640 return end_freq
- start_freq
;
643 unsigned int reg_get_max_bandwidth(const struct ieee80211_regdomain
*rd
,
644 const struct ieee80211_reg_rule
*rule
)
646 unsigned int bw
= reg_get_max_bandwidth_from_range(rd
, rule
);
648 if (rule
->flags
& NL80211_RRF_NO_160MHZ
)
649 bw
= min_t(unsigned int, bw
, MHZ_TO_KHZ(80));
650 if (rule
->flags
& NL80211_RRF_NO_80MHZ
)
651 bw
= min_t(unsigned int, bw
, MHZ_TO_KHZ(40));
654 * HT40+/HT40- limits are handled per-channel. Only limit BW if both
657 if (rule
->flags
& NL80211_RRF_NO_HT40MINUS
&&
658 rule
->flags
& NL80211_RRF_NO_HT40PLUS
)
659 bw
= min_t(unsigned int, bw
, MHZ_TO_KHZ(20));
664 /* Sanity check on a regulatory rule */
665 static bool is_valid_reg_rule(const struct ieee80211_reg_rule
*rule
)
667 const struct ieee80211_freq_range
*freq_range
= &rule
->freq_range
;
670 if (freq_range
->start_freq_khz
<= 0 || freq_range
->end_freq_khz
<= 0)
673 if (freq_range
->start_freq_khz
> freq_range
->end_freq_khz
)
676 freq_diff
= freq_range
->end_freq_khz
- freq_range
->start_freq_khz
;
678 if (freq_range
->end_freq_khz
<= freq_range
->start_freq_khz
||
679 freq_range
->max_bandwidth_khz
> freq_diff
)
685 static bool is_valid_rd(const struct ieee80211_regdomain
*rd
)
687 const struct ieee80211_reg_rule
*reg_rule
= NULL
;
690 if (!rd
->n_reg_rules
)
693 if (WARN_ON(rd
->n_reg_rules
> NL80211_MAX_SUPP_REG_RULES
))
696 for (i
= 0; i
< rd
->n_reg_rules
; i
++) {
697 reg_rule
= &rd
->reg_rules
[i
];
698 if (!is_valid_reg_rule(reg_rule
))
705 static bool reg_does_bw_fit(const struct ieee80211_freq_range
*freq_range
,
706 u32 center_freq_khz
, u32 bw_khz
)
708 u32 start_freq_khz
, end_freq_khz
;
710 start_freq_khz
= center_freq_khz
- (bw_khz
/2);
711 end_freq_khz
= center_freq_khz
+ (bw_khz
/2);
713 if (start_freq_khz
>= freq_range
->start_freq_khz
&&
714 end_freq_khz
<= freq_range
->end_freq_khz
)
721 * freq_in_rule_band - tells us if a frequency is in a frequency band
722 * @freq_range: frequency rule we want to query
723 * @freq_khz: frequency we are inquiring about
725 * This lets us know if a specific frequency rule is or is not relevant to
726 * a specific frequency's band. Bands are device specific and artificial
727 * definitions (the "2.4 GHz band", the "5 GHz band" and the "60GHz band"),
728 * however it is safe for now to assume that a frequency rule should not be
729 * part of a frequency's band if the start freq or end freq are off by more
730 * than 2 GHz for the 2.4 and 5 GHz bands, and by more than 10 GHz for the
732 * This resolution can be lowered and should be considered as we add
733 * regulatory rule support for other "bands".
735 static bool freq_in_rule_band(const struct ieee80211_freq_range
*freq_range
,
738 #define ONE_GHZ_IN_KHZ 1000000
740 * From 802.11ad: directional multi-gigabit (DMG):
741 * Pertaining to operation in a frequency band containing a channel
742 * with the Channel starting frequency above 45 GHz.
744 u32 limit
= freq_khz
> 45 * ONE_GHZ_IN_KHZ
?
745 10 * ONE_GHZ_IN_KHZ
: 2 * ONE_GHZ_IN_KHZ
;
746 if (abs(freq_khz
- freq_range
->start_freq_khz
) <= limit
)
748 if (abs(freq_khz
- freq_range
->end_freq_khz
) <= limit
)
751 #undef ONE_GHZ_IN_KHZ
755 * Later on we can perhaps use the more restrictive DFS
756 * region but we don't have information for that yet so
757 * for now simply disallow conflicts.
759 static enum nl80211_dfs_regions
760 reg_intersect_dfs_region(const enum nl80211_dfs_regions dfs_region1
,
761 const enum nl80211_dfs_regions dfs_region2
)
763 if (dfs_region1
!= dfs_region2
)
764 return NL80211_DFS_UNSET
;
769 * Helper for regdom_intersect(), this does the real
770 * mathematical intersection fun
772 static int reg_rules_intersect(const struct ieee80211_regdomain
*rd1
,
773 const struct ieee80211_regdomain
*rd2
,
774 const struct ieee80211_reg_rule
*rule1
,
775 const struct ieee80211_reg_rule
*rule2
,
776 struct ieee80211_reg_rule
*intersected_rule
)
778 const struct ieee80211_freq_range
*freq_range1
, *freq_range2
;
779 struct ieee80211_freq_range
*freq_range
;
780 const struct ieee80211_power_rule
*power_rule1
, *power_rule2
;
781 struct ieee80211_power_rule
*power_rule
;
782 u32 freq_diff
, max_bandwidth1
, max_bandwidth2
;
784 freq_range1
= &rule1
->freq_range
;
785 freq_range2
= &rule2
->freq_range
;
786 freq_range
= &intersected_rule
->freq_range
;
788 power_rule1
= &rule1
->power_rule
;
789 power_rule2
= &rule2
->power_rule
;
790 power_rule
= &intersected_rule
->power_rule
;
792 freq_range
->start_freq_khz
= max(freq_range1
->start_freq_khz
,
793 freq_range2
->start_freq_khz
);
794 freq_range
->end_freq_khz
= min(freq_range1
->end_freq_khz
,
795 freq_range2
->end_freq_khz
);
797 max_bandwidth1
= freq_range1
->max_bandwidth_khz
;
798 max_bandwidth2
= freq_range2
->max_bandwidth_khz
;
800 if (rule1
->flags
& NL80211_RRF_AUTO_BW
)
801 max_bandwidth1
= reg_get_max_bandwidth(rd1
, rule1
);
802 if (rule2
->flags
& NL80211_RRF_AUTO_BW
)
803 max_bandwidth2
= reg_get_max_bandwidth(rd2
, rule2
);
805 freq_range
->max_bandwidth_khz
= min(max_bandwidth1
, max_bandwidth2
);
807 intersected_rule
->flags
= rule1
->flags
| rule2
->flags
;
810 * In case NL80211_RRF_AUTO_BW requested for both rules
811 * set AUTO_BW in intersected rule also. Next we will
812 * calculate BW correctly in handle_channel function.
813 * In other case remove AUTO_BW flag while we calculate
814 * maximum bandwidth correctly and auto calculation is
817 if ((rule1
->flags
& NL80211_RRF_AUTO_BW
) &&
818 (rule2
->flags
& NL80211_RRF_AUTO_BW
))
819 intersected_rule
->flags
|= NL80211_RRF_AUTO_BW
;
821 intersected_rule
->flags
&= ~NL80211_RRF_AUTO_BW
;
823 freq_diff
= freq_range
->end_freq_khz
- freq_range
->start_freq_khz
;
824 if (freq_range
->max_bandwidth_khz
> freq_diff
)
825 freq_range
->max_bandwidth_khz
= freq_diff
;
827 power_rule
->max_eirp
= min(power_rule1
->max_eirp
,
828 power_rule2
->max_eirp
);
829 power_rule
->max_antenna_gain
= min(power_rule1
->max_antenna_gain
,
830 power_rule2
->max_antenna_gain
);
832 intersected_rule
->dfs_cac_ms
= max(rule1
->dfs_cac_ms
,
835 if (!is_valid_reg_rule(intersected_rule
))
841 /* check whether old rule contains new rule */
842 static bool rule_contains(struct ieee80211_reg_rule
*r1
,
843 struct ieee80211_reg_rule
*r2
)
845 /* for simplicity, currently consider only same flags */
846 if (r1
->flags
!= r2
->flags
)
849 /* verify r1 is more restrictive */
850 if ((r1
->power_rule
.max_antenna_gain
>
851 r2
->power_rule
.max_antenna_gain
) ||
852 r1
->power_rule
.max_eirp
> r2
->power_rule
.max_eirp
)
855 /* make sure r2's range is contained within r1 */
856 if (r1
->freq_range
.start_freq_khz
> r2
->freq_range
.start_freq_khz
||
857 r1
->freq_range
.end_freq_khz
< r2
->freq_range
.end_freq_khz
)
860 /* and finally verify that r1.max_bw >= r2.max_bw */
861 if (r1
->freq_range
.max_bandwidth_khz
<
862 r2
->freq_range
.max_bandwidth_khz
)
868 /* add or extend current rules. do nothing if rule is already contained */
869 static void add_rule(struct ieee80211_reg_rule
*rule
,
870 struct ieee80211_reg_rule
*reg_rules
, u32
*n_rules
)
872 struct ieee80211_reg_rule
*tmp_rule
;
875 for (i
= 0; i
< *n_rules
; i
++) {
876 tmp_rule
= ®_rules
[i
];
877 /* rule is already contained - do nothing */
878 if (rule_contains(tmp_rule
, rule
))
881 /* extend rule if possible */
882 if (rule_contains(rule
, tmp_rule
)) {
883 memcpy(tmp_rule
, rule
, sizeof(*rule
));
888 memcpy(®_rules
[*n_rules
], rule
, sizeof(*rule
));
893 * regdom_intersect - do the intersection between two regulatory domains
894 * @rd1: first regulatory domain
895 * @rd2: second regulatory domain
897 * Use this function to get the intersection between two regulatory domains.
898 * Once completed we will mark the alpha2 for the rd as intersected, "98",
899 * as no one single alpha2 can represent this regulatory domain.
901 * Returns a pointer to the regulatory domain structure which will hold the
902 * resulting intersection of rules between rd1 and rd2. We will
903 * kzalloc() this structure for you.
905 static struct ieee80211_regdomain
*
906 regdom_intersect(const struct ieee80211_regdomain
*rd1
,
907 const struct ieee80211_regdomain
*rd2
)
911 unsigned int num_rules
= 0;
912 const struct ieee80211_reg_rule
*rule1
, *rule2
;
913 struct ieee80211_reg_rule intersected_rule
;
914 struct ieee80211_regdomain
*rd
;
920 * First we get a count of the rules we'll need, then we actually
921 * build them. This is to so we can malloc() and free() a
922 * regdomain once. The reason we use reg_rules_intersect() here
923 * is it will return -EINVAL if the rule computed makes no sense.
924 * All rules that do check out OK are valid.
927 for (x
= 0; x
< rd1
->n_reg_rules
; x
++) {
928 rule1
= &rd1
->reg_rules
[x
];
929 for (y
= 0; y
< rd2
->n_reg_rules
; y
++) {
930 rule2
= &rd2
->reg_rules
[y
];
931 if (!reg_rules_intersect(rd1
, rd2
, rule1
, rule2
,
940 size_of_regd
= sizeof(struct ieee80211_regdomain
) +
941 num_rules
* sizeof(struct ieee80211_reg_rule
);
943 rd
= kzalloc(size_of_regd
, GFP_KERNEL
);
947 for (x
= 0; x
< rd1
->n_reg_rules
; x
++) {
948 rule1
= &rd1
->reg_rules
[x
];
949 for (y
= 0; y
< rd2
->n_reg_rules
; y
++) {
950 rule2
= &rd2
->reg_rules
[y
];
951 r
= reg_rules_intersect(rd1
, rd2
, rule1
, rule2
,
954 * No need to memset here the intersected rule here as
955 * we're not using the stack anymore
960 add_rule(&intersected_rule
, rd
->reg_rules
,
967 rd
->dfs_region
= reg_intersect_dfs_region(rd1
->dfs_region
,
974 * XXX: add support for the rest of enum nl80211_reg_rule_flags, we may
975 * want to just have the channel structure use these
977 static u32
map_regdom_flags(u32 rd_flags
)
979 u32 channel_flags
= 0;
980 if (rd_flags
& NL80211_RRF_NO_IR_ALL
)
981 channel_flags
|= IEEE80211_CHAN_NO_IR
;
982 if (rd_flags
& NL80211_RRF_DFS
)
983 channel_flags
|= IEEE80211_CHAN_RADAR
;
984 if (rd_flags
& NL80211_RRF_NO_OFDM
)
985 channel_flags
|= IEEE80211_CHAN_NO_OFDM
;
986 if (rd_flags
& NL80211_RRF_NO_OUTDOOR
)
987 channel_flags
|= IEEE80211_CHAN_INDOOR_ONLY
;
988 if (rd_flags
& NL80211_RRF_IR_CONCURRENT
)
989 channel_flags
|= IEEE80211_CHAN_IR_CONCURRENT
;
990 if (rd_flags
& NL80211_RRF_NO_HT40MINUS
)
991 channel_flags
|= IEEE80211_CHAN_NO_HT40MINUS
;
992 if (rd_flags
& NL80211_RRF_NO_HT40PLUS
)
993 channel_flags
|= IEEE80211_CHAN_NO_HT40PLUS
;
994 if (rd_flags
& NL80211_RRF_NO_80MHZ
)
995 channel_flags
|= IEEE80211_CHAN_NO_80MHZ
;
996 if (rd_flags
& NL80211_RRF_NO_160MHZ
)
997 channel_flags
|= IEEE80211_CHAN_NO_160MHZ
;
998 return channel_flags
;
1001 static const struct ieee80211_reg_rule
*
1002 freq_reg_info_regd(struct wiphy
*wiphy
, u32 center_freq
,
1003 const struct ieee80211_regdomain
*regd
, u32 bw
)
1006 bool band_rule_found
= false;
1007 bool bw_fits
= false;
1010 return ERR_PTR(-EINVAL
);
1012 for (i
= 0; i
< regd
->n_reg_rules
; i
++) {
1013 const struct ieee80211_reg_rule
*rr
;
1014 const struct ieee80211_freq_range
*fr
= NULL
;
1016 rr
= ®d
->reg_rules
[i
];
1017 fr
= &rr
->freq_range
;
1020 * We only need to know if one frequency rule was
1021 * was in center_freq's band, that's enough, so lets
1022 * not overwrite it once found
1024 if (!band_rule_found
)
1025 band_rule_found
= freq_in_rule_band(fr
, center_freq
);
1027 bw_fits
= reg_does_bw_fit(fr
, center_freq
, bw
);
1029 if (band_rule_found
&& bw_fits
)
1033 if (!band_rule_found
)
1034 return ERR_PTR(-ERANGE
);
1036 return ERR_PTR(-EINVAL
);
1039 static const struct ieee80211_reg_rule
*
1040 __freq_reg_info(struct wiphy
*wiphy
, u32 center_freq
, u32 min_bw
)
1042 const struct ieee80211_regdomain
*regd
= reg_get_regdomain(wiphy
);
1043 const struct ieee80211_reg_rule
*reg_rule
= NULL
;
1046 for (bw
= MHZ_TO_KHZ(20); bw
>= min_bw
; bw
= bw
/ 2) {
1047 reg_rule
= freq_reg_info_regd(wiphy
, center_freq
, regd
, bw
);
1048 if (!IS_ERR(reg_rule
))
1055 const struct ieee80211_reg_rule
*freq_reg_info(struct wiphy
*wiphy
,
1058 return __freq_reg_info(wiphy
, center_freq
, MHZ_TO_KHZ(20));
1060 EXPORT_SYMBOL(freq_reg_info
);
1062 const char *reg_initiator_name(enum nl80211_reg_initiator initiator
)
1064 switch (initiator
) {
1065 case NL80211_REGDOM_SET_BY_CORE
:
1067 case NL80211_REGDOM_SET_BY_USER
:
1069 case NL80211_REGDOM_SET_BY_DRIVER
:
1071 case NL80211_REGDOM_SET_BY_COUNTRY_IE
:
1072 return "country IE";
1078 EXPORT_SYMBOL(reg_initiator_name
);
1080 #ifdef CONFIG_CFG80211_REG_DEBUG
1081 static void chan_reg_rule_print_dbg(const struct ieee80211_regdomain
*regd
,
1082 struct ieee80211_channel
*chan
,
1083 const struct ieee80211_reg_rule
*reg_rule
)
1085 const struct ieee80211_power_rule
*power_rule
;
1086 const struct ieee80211_freq_range
*freq_range
;
1087 char max_antenna_gain
[32], bw
[32];
1089 power_rule
= ®_rule
->power_rule
;
1090 freq_range
= ®_rule
->freq_range
;
1092 if (!power_rule
->max_antenna_gain
)
1093 snprintf(max_antenna_gain
, sizeof(max_antenna_gain
), "N/A");
1095 snprintf(max_antenna_gain
, sizeof(max_antenna_gain
), "%d",
1096 power_rule
->max_antenna_gain
);
1098 if (reg_rule
->flags
& NL80211_RRF_AUTO_BW
)
1099 snprintf(bw
, sizeof(bw
), "%d KHz, %d KHz AUTO",
1100 freq_range
->max_bandwidth_khz
,
1101 reg_get_max_bandwidth(regd
, reg_rule
));
1103 snprintf(bw
, sizeof(bw
), "%d KHz",
1104 freq_range
->max_bandwidth_khz
);
1106 REG_DBG_PRINT("Updating information on frequency %d MHz with regulatory rule:\n",
1109 REG_DBG_PRINT("%d KHz - %d KHz @ %s), (%s mBi, %d mBm)\n",
1110 freq_range
->start_freq_khz
, freq_range
->end_freq_khz
,
1111 bw
, max_antenna_gain
,
1112 power_rule
->max_eirp
);
1115 static void chan_reg_rule_print_dbg(const struct ieee80211_regdomain
*regd
,
1116 struct ieee80211_channel
*chan
,
1117 const struct ieee80211_reg_rule
*reg_rule
)
1124 * Note that right now we assume the desired channel bandwidth
1125 * is always 20 MHz for each individual channel (HT40 uses 20 MHz
1126 * per channel, the primary and the extension channel).
1128 static void handle_channel(struct wiphy
*wiphy
,
1129 enum nl80211_reg_initiator initiator
,
1130 struct ieee80211_channel
*chan
)
1132 u32 flags
, bw_flags
= 0;
1133 const struct ieee80211_reg_rule
*reg_rule
= NULL
;
1134 const struct ieee80211_power_rule
*power_rule
= NULL
;
1135 const struct ieee80211_freq_range
*freq_range
= NULL
;
1136 struct wiphy
*request_wiphy
= NULL
;
1137 struct regulatory_request
*lr
= get_last_request();
1138 const struct ieee80211_regdomain
*regd
;
1139 u32 max_bandwidth_khz
;
1141 request_wiphy
= wiphy_idx_to_wiphy(lr
->wiphy_idx
);
1143 flags
= chan
->orig_flags
;
1145 reg_rule
= freq_reg_info(wiphy
, MHZ_TO_KHZ(chan
->center_freq
));
1146 if (IS_ERR(reg_rule
)) {
1148 * We will disable all channels that do not match our
1149 * received regulatory rule unless the hint is coming
1150 * from a Country IE and the Country IE had no information
1151 * about a band. The IEEE 802.11 spec allows for an AP
1152 * to send only a subset of the regulatory rules allowed,
1153 * so an AP in the US that only supports 2.4 GHz may only send
1154 * a country IE with information for the 2.4 GHz band
1155 * while 5 GHz is still supported.
1157 if (initiator
== NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
1158 PTR_ERR(reg_rule
) == -ERANGE
)
1161 if (lr
->initiator
== NL80211_REGDOM_SET_BY_DRIVER
&&
1162 request_wiphy
&& request_wiphy
== wiphy
&&
1163 request_wiphy
->regulatory_flags
& REGULATORY_STRICT_REG
) {
1164 REG_DBG_PRINT("Disabling freq %d MHz for good\n",
1166 chan
->orig_flags
|= IEEE80211_CHAN_DISABLED
;
1167 chan
->flags
= chan
->orig_flags
;
1169 REG_DBG_PRINT("Disabling freq %d MHz\n",
1171 chan
->flags
|= IEEE80211_CHAN_DISABLED
;
1176 regd
= reg_get_regdomain(wiphy
);
1177 chan_reg_rule_print_dbg(regd
, chan
, reg_rule
);
1179 power_rule
= ®_rule
->power_rule
;
1180 freq_range
= ®_rule
->freq_range
;
1182 max_bandwidth_khz
= freq_range
->max_bandwidth_khz
;
1183 /* Check if auto calculation requested */
1184 if (reg_rule
->flags
& NL80211_RRF_AUTO_BW
)
1185 max_bandwidth_khz
= reg_get_max_bandwidth(regd
, reg_rule
);
1187 /* If we get a reg_rule we can assume that at least 5Mhz fit */
1188 if (!reg_does_bw_fit(freq_range
, MHZ_TO_KHZ(chan
->center_freq
),
1190 bw_flags
|= IEEE80211_CHAN_NO_10MHZ
;
1191 if (!reg_does_bw_fit(freq_range
, MHZ_TO_KHZ(chan
->center_freq
),
1193 bw_flags
|= IEEE80211_CHAN_NO_20MHZ
;
1195 if (max_bandwidth_khz
< MHZ_TO_KHZ(10))
1196 bw_flags
|= IEEE80211_CHAN_NO_10MHZ
;
1197 if (max_bandwidth_khz
< MHZ_TO_KHZ(20))
1198 bw_flags
|= IEEE80211_CHAN_NO_20MHZ
;
1199 if (max_bandwidth_khz
< MHZ_TO_KHZ(40))
1200 bw_flags
|= IEEE80211_CHAN_NO_HT40
;
1201 if (max_bandwidth_khz
< MHZ_TO_KHZ(80))
1202 bw_flags
|= IEEE80211_CHAN_NO_80MHZ
;
1203 if (max_bandwidth_khz
< MHZ_TO_KHZ(160))
1204 bw_flags
|= IEEE80211_CHAN_NO_160MHZ
;
1206 if (lr
->initiator
== NL80211_REGDOM_SET_BY_DRIVER
&&
1207 request_wiphy
&& request_wiphy
== wiphy
&&
1208 request_wiphy
->regulatory_flags
& REGULATORY_STRICT_REG
) {
1210 * This guarantees the driver's requested regulatory domain
1211 * will always be used as a base for further regulatory
1214 chan
->flags
= chan
->orig_flags
=
1215 map_regdom_flags(reg_rule
->flags
) | bw_flags
;
1216 chan
->max_antenna_gain
= chan
->orig_mag
=
1217 (int) MBI_TO_DBI(power_rule
->max_antenna_gain
);
1218 chan
->max_reg_power
= chan
->max_power
= chan
->orig_mpwr
=
1219 (int) MBM_TO_DBM(power_rule
->max_eirp
);
1221 if (chan
->flags
& IEEE80211_CHAN_RADAR
) {
1222 chan
->dfs_cac_ms
= IEEE80211_DFS_MIN_CAC_TIME_MS
;
1223 if (reg_rule
->dfs_cac_ms
)
1224 chan
->dfs_cac_ms
= reg_rule
->dfs_cac_ms
;
1230 chan
->dfs_state
= NL80211_DFS_USABLE
;
1231 chan
->dfs_state_entered
= jiffies
;
1233 chan
->beacon_found
= false;
1234 chan
->flags
= flags
| bw_flags
| map_regdom_flags(reg_rule
->flags
);
1235 chan
->max_antenna_gain
=
1236 min_t(int, chan
->orig_mag
,
1237 MBI_TO_DBI(power_rule
->max_antenna_gain
));
1238 chan
->max_reg_power
= (int) MBM_TO_DBM(power_rule
->max_eirp
);
1240 if (chan
->flags
& IEEE80211_CHAN_RADAR
) {
1241 if (reg_rule
->dfs_cac_ms
)
1242 chan
->dfs_cac_ms
= reg_rule
->dfs_cac_ms
;
1244 chan
->dfs_cac_ms
= IEEE80211_DFS_MIN_CAC_TIME_MS
;
1247 if (chan
->orig_mpwr
) {
1249 * Devices that use REGULATORY_COUNTRY_IE_FOLLOW_POWER
1250 * will always follow the passed country IE power settings.
1252 if (initiator
== NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
1253 wiphy
->regulatory_flags
& REGULATORY_COUNTRY_IE_FOLLOW_POWER
)
1254 chan
->max_power
= chan
->max_reg_power
;
1256 chan
->max_power
= min(chan
->orig_mpwr
,
1257 chan
->max_reg_power
);
1259 chan
->max_power
= chan
->max_reg_power
;
1262 static void handle_band(struct wiphy
*wiphy
,
1263 enum nl80211_reg_initiator initiator
,
1264 struct ieee80211_supported_band
*sband
)
1271 for (i
= 0; i
< sband
->n_channels
; i
++)
1272 handle_channel(wiphy
, initiator
, &sband
->channels
[i
]);
1275 static bool reg_request_cell_base(struct regulatory_request
*request
)
1277 if (request
->initiator
!= NL80211_REGDOM_SET_BY_USER
)
1279 return request
->user_reg_hint_type
== NL80211_USER_REG_HINT_CELL_BASE
;
1282 bool reg_last_request_cell_base(void)
1284 return reg_request_cell_base(get_last_request());
1287 #ifdef CONFIG_CFG80211_REG_CELLULAR_HINTS
1288 /* Core specific check */
1289 static enum reg_request_treatment
1290 reg_ignore_cell_hint(struct regulatory_request
*pending_request
)
1292 struct regulatory_request
*lr
= get_last_request();
1294 if (!reg_num_devs_support_basehint
)
1295 return REG_REQ_IGNORE
;
1297 if (reg_request_cell_base(lr
) &&
1298 !regdom_changes(pending_request
->alpha2
))
1299 return REG_REQ_ALREADY_SET
;
1304 /* Device specific check */
1305 static bool reg_dev_ignore_cell_hint(struct wiphy
*wiphy
)
1307 return !(wiphy
->features
& NL80211_FEATURE_CELL_BASE_REG_HINTS
);
1310 static int reg_ignore_cell_hint(struct regulatory_request
*pending_request
)
1312 return REG_REQ_IGNORE
;
1315 static bool reg_dev_ignore_cell_hint(struct wiphy
*wiphy
)
1321 static bool wiphy_strict_alpha2_regd(struct wiphy
*wiphy
)
1323 if (wiphy
->regulatory_flags
& REGULATORY_STRICT_REG
&&
1324 !(wiphy
->regulatory_flags
& REGULATORY_CUSTOM_REG
))
1329 static bool ignore_reg_update(struct wiphy
*wiphy
,
1330 enum nl80211_reg_initiator initiator
)
1332 struct regulatory_request
*lr
= get_last_request();
1334 if (wiphy
->regulatory_flags
& REGULATORY_WIPHY_SELF_MANAGED
)
1338 REG_DBG_PRINT("Ignoring regulatory request set by %s "
1339 "since last_request is not set\n",
1340 reg_initiator_name(initiator
));
1344 if (initiator
== NL80211_REGDOM_SET_BY_CORE
&&
1345 wiphy
->regulatory_flags
& REGULATORY_CUSTOM_REG
) {
1346 REG_DBG_PRINT("Ignoring regulatory request set by %s "
1347 "since the driver uses its own custom "
1348 "regulatory domain\n",
1349 reg_initiator_name(initiator
));
1354 * wiphy->regd will be set once the device has its own
1355 * desired regulatory domain set
1357 if (wiphy_strict_alpha2_regd(wiphy
) && !wiphy
->regd
&&
1358 initiator
!= NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
1359 !is_world_regdom(lr
->alpha2
)) {
1360 REG_DBG_PRINT("Ignoring regulatory request set by %s "
1361 "since the driver requires its own regulatory "
1362 "domain to be set first\n",
1363 reg_initiator_name(initiator
));
1367 if (reg_request_cell_base(lr
))
1368 return reg_dev_ignore_cell_hint(wiphy
);
1373 static bool reg_is_world_roaming(struct wiphy
*wiphy
)
1375 const struct ieee80211_regdomain
*cr
= get_cfg80211_regdom();
1376 const struct ieee80211_regdomain
*wr
= get_wiphy_regdom(wiphy
);
1377 struct regulatory_request
*lr
= get_last_request();
1379 if (is_world_regdom(cr
->alpha2
) || (wr
&& is_world_regdom(wr
->alpha2
)))
1382 if (lr
&& lr
->initiator
!= NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
1383 wiphy
->regulatory_flags
& REGULATORY_CUSTOM_REG
)
1389 static void handle_reg_beacon(struct wiphy
*wiphy
, unsigned int chan_idx
,
1390 struct reg_beacon
*reg_beacon
)
1392 struct ieee80211_supported_band
*sband
;
1393 struct ieee80211_channel
*chan
;
1394 bool channel_changed
= false;
1395 struct ieee80211_channel chan_before
;
1397 sband
= wiphy
->bands
[reg_beacon
->chan
.band
];
1398 chan
= &sband
->channels
[chan_idx
];
1400 if (likely(chan
->center_freq
!= reg_beacon
->chan
.center_freq
))
1403 if (chan
->beacon_found
)
1406 chan
->beacon_found
= true;
1408 if (!reg_is_world_roaming(wiphy
))
1411 if (wiphy
->regulatory_flags
& REGULATORY_DISABLE_BEACON_HINTS
)
1414 chan_before
.center_freq
= chan
->center_freq
;
1415 chan_before
.flags
= chan
->flags
;
1417 if (chan
->flags
& IEEE80211_CHAN_NO_IR
) {
1418 chan
->flags
&= ~IEEE80211_CHAN_NO_IR
;
1419 channel_changed
= true;
1422 if (channel_changed
)
1423 nl80211_send_beacon_hint_event(wiphy
, &chan_before
, chan
);
1427 * Called when a scan on a wiphy finds a beacon on
1430 static void wiphy_update_new_beacon(struct wiphy
*wiphy
,
1431 struct reg_beacon
*reg_beacon
)
1434 struct ieee80211_supported_band
*sband
;
1436 if (!wiphy
->bands
[reg_beacon
->chan
.band
])
1439 sband
= wiphy
->bands
[reg_beacon
->chan
.band
];
1441 for (i
= 0; i
< sband
->n_channels
; i
++)
1442 handle_reg_beacon(wiphy
, i
, reg_beacon
);
1446 * Called upon reg changes or a new wiphy is added
1448 static void wiphy_update_beacon_reg(struct wiphy
*wiphy
)
1451 struct ieee80211_supported_band
*sband
;
1452 struct reg_beacon
*reg_beacon
;
1454 list_for_each_entry(reg_beacon
, ®_beacon_list
, list
) {
1455 if (!wiphy
->bands
[reg_beacon
->chan
.band
])
1457 sband
= wiphy
->bands
[reg_beacon
->chan
.band
];
1458 for (i
= 0; i
< sband
->n_channels
; i
++)
1459 handle_reg_beacon(wiphy
, i
, reg_beacon
);
1463 /* Reap the advantages of previously found beacons */
1464 static void reg_process_beacons(struct wiphy
*wiphy
)
1467 * Means we are just firing up cfg80211, so no beacons would
1468 * have been processed yet.
1472 wiphy_update_beacon_reg(wiphy
);
1475 static bool is_ht40_allowed(struct ieee80211_channel
*chan
)
1479 if (chan
->flags
& IEEE80211_CHAN_DISABLED
)
1481 /* This would happen when regulatory rules disallow HT40 completely */
1482 if ((chan
->flags
& IEEE80211_CHAN_NO_HT40
) == IEEE80211_CHAN_NO_HT40
)
1487 static void reg_process_ht_flags_channel(struct wiphy
*wiphy
,
1488 struct ieee80211_channel
*channel
)
1490 struct ieee80211_supported_band
*sband
= wiphy
->bands
[channel
->band
];
1491 struct ieee80211_channel
*channel_before
= NULL
, *channel_after
= NULL
;
1494 if (!is_ht40_allowed(channel
)) {
1495 channel
->flags
|= IEEE80211_CHAN_NO_HT40
;
1500 * We need to ensure the extension channels exist to
1501 * be able to use HT40- or HT40+, this finds them (or not)
1503 for (i
= 0; i
< sband
->n_channels
; i
++) {
1504 struct ieee80211_channel
*c
= &sband
->channels
[i
];
1506 if (c
->center_freq
== (channel
->center_freq
- 20))
1508 if (c
->center_freq
== (channel
->center_freq
+ 20))
1513 * Please note that this assumes target bandwidth is 20 MHz,
1514 * if that ever changes we also need to change the below logic
1515 * to include that as well.
1517 if (!is_ht40_allowed(channel_before
))
1518 channel
->flags
|= IEEE80211_CHAN_NO_HT40MINUS
;
1520 channel
->flags
&= ~IEEE80211_CHAN_NO_HT40MINUS
;
1522 if (!is_ht40_allowed(channel_after
))
1523 channel
->flags
|= IEEE80211_CHAN_NO_HT40PLUS
;
1525 channel
->flags
&= ~IEEE80211_CHAN_NO_HT40PLUS
;
1528 static void reg_process_ht_flags_band(struct wiphy
*wiphy
,
1529 struct ieee80211_supported_band
*sband
)
1536 for (i
= 0; i
< sband
->n_channels
; i
++)
1537 reg_process_ht_flags_channel(wiphy
, &sband
->channels
[i
]);
1540 static void reg_process_ht_flags(struct wiphy
*wiphy
)
1542 enum ieee80211_band band
;
1547 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++)
1548 reg_process_ht_flags_band(wiphy
, wiphy
->bands
[band
]);
1551 static void reg_call_notifier(struct wiphy
*wiphy
,
1552 struct regulatory_request
*request
)
1554 if (wiphy
->reg_notifier
)
1555 wiphy
->reg_notifier(wiphy
, request
);
1558 static bool reg_wdev_chan_valid(struct wiphy
*wiphy
, struct wireless_dev
*wdev
)
1560 struct cfg80211_chan_def chandef
;
1561 struct cfg80211_registered_device
*rdev
= wiphy_to_rdev(wiphy
);
1562 enum nl80211_iftype iftype
;
1565 iftype
= wdev
->iftype
;
1567 /* make sure the interface is active */
1568 if (!wdev
->netdev
|| !netif_running(wdev
->netdev
))
1569 goto wdev_inactive_unlock
;
1572 case NL80211_IFTYPE_AP
:
1573 case NL80211_IFTYPE_P2P_GO
:
1574 if (!wdev
->beacon_interval
)
1575 goto wdev_inactive_unlock
;
1576 chandef
= wdev
->chandef
;
1578 case NL80211_IFTYPE_ADHOC
:
1579 if (!wdev
->ssid_len
)
1580 goto wdev_inactive_unlock
;
1581 chandef
= wdev
->chandef
;
1583 case NL80211_IFTYPE_STATION
:
1584 case NL80211_IFTYPE_P2P_CLIENT
:
1585 if (!wdev
->current_bss
||
1586 !wdev
->current_bss
->pub
.channel
)
1587 goto wdev_inactive_unlock
;
1589 if (!rdev
->ops
->get_channel
||
1590 rdev_get_channel(rdev
, wdev
, &chandef
))
1591 cfg80211_chandef_create(&chandef
,
1592 wdev
->current_bss
->pub
.channel
,
1593 NL80211_CHAN_NO_HT
);
1595 case NL80211_IFTYPE_MONITOR
:
1596 case NL80211_IFTYPE_AP_VLAN
:
1597 case NL80211_IFTYPE_P2P_DEVICE
:
1598 /* no enforcement required */
1601 /* others not implemented for now */
1609 case NL80211_IFTYPE_AP
:
1610 case NL80211_IFTYPE_P2P_GO
:
1611 case NL80211_IFTYPE_ADHOC
:
1612 return cfg80211_reg_can_beacon_relax(wiphy
, &chandef
, iftype
);
1613 case NL80211_IFTYPE_STATION
:
1614 case NL80211_IFTYPE_P2P_CLIENT
:
1615 return cfg80211_chandef_usable(wiphy
, &chandef
,
1616 IEEE80211_CHAN_DISABLED
);
1623 wdev_inactive_unlock
:
1628 static void reg_leave_invalid_chans(struct wiphy
*wiphy
)
1630 struct wireless_dev
*wdev
;
1631 struct cfg80211_registered_device
*rdev
= wiphy_to_rdev(wiphy
);
1635 list_for_each_entry(wdev
, &rdev
->wdev_list
, list
)
1636 if (!reg_wdev_chan_valid(wiphy
, wdev
))
1637 cfg80211_leave(rdev
, wdev
);
1640 static void reg_check_chans_work(struct work_struct
*work
)
1642 struct cfg80211_registered_device
*rdev
;
1644 REG_DBG_PRINT("Verifying active interfaces after reg change\n");
1647 list_for_each_entry(rdev
, &cfg80211_rdev_list
, list
)
1648 if (!(rdev
->wiphy
.regulatory_flags
&
1649 REGULATORY_IGNORE_STALE_KICKOFF
))
1650 reg_leave_invalid_chans(&rdev
->wiphy
);
1655 static void reg_check_channels(void)
1658 * Give usermode a chance to do something nicer (move to another
1659 * channel, orderly disconnection), before forcing a disconnection.
1661 mod_delayed_work(system_power_efficient_wq
,
1663 msecs_to_jiffies(REG_ENFORCE_GRACE_MS
));
1666 static void wiphy_update_regulatory(struct wiphy
*wiphy
,
1667 enum nl80211_reg_initiator initiator
)
1669 enum ieee80211_band band
;
1670 struct regulatory_request
*lr
= get_last_request();
1672 if (ignore_reg_update(wiphy
, initiator
)) {
1674 * Regulatory updates set by CORE are ignored for custom
1675 * regulatory cards. Let us notify the changes to the driver,
1676 * as some drivers used this to restore its orig_* reg domain.
1678 if (initiator
== NL80211_REGDOM_SET_BY_CORE
&&
1679 wiphy
->regulatory_flags
& REGULATORY_CUSTOM_REG
)
1680 reg_call_notifier(wiphy
, lr
);
1684 lr
->dfs_region
= get_cfg80211_regdom()->dfs_region
;
1686 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++)
1687 handle_band(wiphy
, initiator
, wiphy
->bands
[band
]);
1689 reg_process_beacons(wiphy
);
1690 reg_process_ht_flags(wiphy
);
1691 reg_call_notifier(wiphy
, lr
);
1694 static void update_all_wiphy_regulatory(enum nl80211_reg_initiator initiator
)
1696 struct cfg80211_registered_device
*rdev
;
1697 struct wiphy
*wiphy
;
1701 list_for_each_entry(rdev
, &cfg80211_rdev_list
, list
) {
1702 wiphy
= &rdev
->wiphy
;
1703 wiphy_update_regulatory(wiphy
, initiator
);
1706 reg_check_channels();
1709 static void handle_channel_custom(struct wiphy
*wiphy
,
1710 struct ieee80211_channel
*chan
,
1711 const struct ieee80211_regdomain
*regd
)
1714 const struct ieee80211_reg_rule
*reg_rule
= NULL
;
1715 const struct ieee80211_power_rule
*power_rule
= NULL
;
1716 const struct ieee80211_freq_range
*freq_range
= NULL
;
1717 u32 max_bandwidth_khz
;
1720 for (bw
= MHZ_TO_KHZ(20); bw
>= MHZ_TO_KHZ(5); bw
= bw
/ 2) {
1721 reg_rule
= freq_reg_info_regd(wiphy
,
1722 MHZ_TO_KHZ(chan
->center_freq
),
1724 if (!IS_ERR(reg_rule
))
1728 if (IS_ERR(reg_rule
)) {
1729 REG_DBG_PRINT("Disabling freq %d MHz as custom regd has no rule that fits it\n",
1731 if (wiphy
->regulatory_flags
& REGULATORY_WIPHY_SELF_MANAGED
) {
1732 chan
->flags
|= IEEE80211_CHAN_DISABLED
;
1734 chan
->orig_flags
|= IEEE80211_CHAN_DISABLED
;
1735 chan
->flags
= chan
->orig_flags
;
1740 chan_reg_rule_print_dbg(regd
, chan
, reg_rule
);
1742 power_rule
= ®_rule
->power_rule
;
1743 freq_range
= ®_rule
->freq_range
;
1745 max_bandwidth_khz
= freq_range
->max_bandwidth_khz
;
1746 /* Check if auto calculation requested */
1747 if (reg_rule
->flags
& NL80211_RRF_AUTO_BW
)
1748 max_bandwidth_khz
= reg_get_max_bandwidth(regd
, reg_rule
);
1750 /* If we get a reg_rule we can assume that at least 5Mhz fit */
1751 if (!reg_does_bw_fit(freq_range
, MHZ_TO_KHZ(chan
->center_freq
),
1753 bw_flags
|= IEEE80211_CHAN_NO_10MHZ
;
1754 if (!reg_does_bw_fit(freq_range
, MHZ_TO_KHZ(chan
->center_freq
),
1756 bw_flags
|= IEEE80211_CHAN_NO_20MHZ
;
1758 if (max_bandwidth_khz
< MHZ_TO_KHZ(10))
1759 bw_flags
|= IEEE80211_CHAN_NO_10MHZ
;
1760 if (max_bandwidth_khz
< MHZ_TO_KHZ(20))
1761 bw_flags
|= IEEE80211_CHAN_NO_20MHZ
;
1762 if (max_bandwidth_khz
< MHZ_TO_KHZ(40))
1763 bw_flags
|= IEEE80211_CHAN_NO_HT40
;
1764 if (max_bandwidth_khz
< MHZ_TO_KHZ(80))
1765 bw_flags
|= IEEE80211_CHAN_NO_80MHZ
;
1766 if (max_bandwidth_khz
< MHZ_TO_KHZ(160))
1767 bw_flags
|= IEEE80211_CHAN_NO_160MHZ
;
1769 chan
->dfs_state_entered
= jiffies
;
1770 chan
->dfs_state
= NL80211_DFS_USABLE
;
1772 chan
->beacon_found
= false;
1774 if (wiphy
->regulatory_flags
& REGULATORY_WIPHY_SELF_MANAGED
)
1775 chan
->flags
= chan
->orig_flags
| bw_flags
|
1776 map_regdom_flags(reg_rule
->flags
);
1778 chan
->flags
|= map_regdom_flags(reg_rule
->flags
) | bw_flags
;
1780 chan
->max_antenna_gain
= (int) MBI_TO_DBI(power_rule
->max_antenna_gain
);
1781 chan
->max_reg_power
= chan
->max_power
=
1782 (int) MBM_TO_DBM(power_rule
->max_eirp
);
1784 if (chan
->flags
& IEEE80211_CHAN_RADAR
) {
1785 if (reg_rule
->dfs_cac_ms
)
1786 chan
->dfs_cac_ms
= reg_rule
->dfs_cac_ms
;
1788 chan
->dfs_cac_ms
= IEEE80211_DFS_MIN_CAC_TIME_MS
;
1791 chan
->max_power
= chan
->max_reg_power
;
1794 static void handle_band_custom(struct wiphy
*wiphy
,
1795 struct ieee80211_supported_band
*sband
,
1796 const struct ieee80211_regdomain
*regd
)
1803 for (i
= 0; i
< sband
->n_channels
; i
++)
1804 handle_channel_custom(wiphy
, &sband
->channels
[i
], regd
);
1807 /* Used by drivers prior to wiphy registration */
1808 void wiphy_apply_custom_regulatory(struct wiphy
*wiphy
,
1809 const struct ieee80211_regdomain
*regd
)
1811 enum ieee80211_band band
;
1812 unsigned int bands_set
= 0;
1814 WARN(!(wiphy
->regulatory_flags
& REGULATORY_CUSTOM_REG
),
1815 "wiphy should have REGULATORY_CUSTOM_REG\n");
1816 wiphy
->regulatory_flags
|= REGULATORY_CUSTOM_REG
;
1818 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++) {
1819 if (!wiphy
->bands
[band
])
1821 handle_band_custom(wiphy
, wiphy
->bands
[band
], regd
);
1826 * no point in calling this if it won't have any effect
1827 * on your device's supported bands.
1829 WARN_ON(!bands_set
);
1831 EXPORT_SYMBOL(wiphy_apply_custom_regulatory
);
1833 static void reg_set_request_processed(void)
1835 bool need_more_processing
= false;
1836 struct regulatory_request
*lr
= get_last_request();
1838 lr
->processed
= true;
1840 spin_lock(®_requests_lock
);
1841 if (!list_empty(®_requests_list
))
1842 need_more_processing
= true;
1843 spin_unlock(®_requests_lock
);
1845 cancel_delayed_work(®_timeout
);
1847 if (need_more_processing
)
1848 schedule_work(®_work
);
1852 * reg_process_hint_core - process core regulatory requests
1853 * @pending_request: a pending core regulatory request
1855 * The wireless subsystem can use this function to process
1856 * a regulatory request issued by the regulatory core.
1858 static void reg_process_hint_core(struct regulatory_request
*core_request
)
1860 if (reg_call_crda(core_request
)) {
1861 core_request
->intersect
= false;
1862 core_request
->processed
= false;
1863 reg_update_last_request(core_request
);
1867 static enum reg_request_treatment
1868 __reg_process_hint_user(struct regulatory_request
*user_request
)
1870 struct regulatory_request
*lr
= get_last_request();
1872 if (reg_request_cell_base(user_request
))
1873 return reg_ignore_cell_hint(user_request
);
1875 if (reg_request_cell_base(lr
))
1876 return REG_REQ_IGNORE
;
1878 if (lr
->initiator
== NL80211_REGDOM_SET_BY_COUNTRY_IE
)
1879 return REG_REQ_INTERSECT
;
1881 * If the user knows better the user should set the regdom
1882 * to their country before the IE is picked up
1884 if (lr
->initiator
== NL80211_REGDOM_SET_BY_USER
&&
1886 return REG_REQ_IGNORE
;
1888 * Process user requests only after previous user/driver/core
1889 * requests have been processed
1891 if ((lr
->initiator
== NL80211_REGDOM_SET_BY_CORE
||
1892 lr
->initiator
== NL80211_REGDOM_SET_BY_DRIVER
||
1893 lr
->initiator
== NL80211_REGDOM_SET_BY_USER
) &&
1894 regdom_changes(lr
->alpha2
))
1895 return REG_REQ_IGNORE
;
1897 if (!regdom_changes(user_request
->alpha2
))
1898 return REG_REQ_ALREADY_SET
;
1904 * reg_process_hint_user - process user regulatory requests
1905 * @user_request: a pending user regulatory request
1907 * The wireless subsystem can use this function to process
1908 * a regulatory request initiated by userspace.
1910 static void reg_process_hint_user(struct regulatory_request
*user_request
)
1912 enum reg_request_treatment treatment
;
1914 treatment
= __reg_process_hint_user(user_request
);
1915 if (treatment
== REG_REQ_IGNORE
||
1916 treatment
== REG_REQ_ALREADY_SET
) {
1917 reg_free_request(user_request
);
1921 user_request
->intersect
= treatment
== REG_REQ_INTERSECT
;
1922 user_request
->processed
= false;
1924 if (reg_call_crda(user_request
)) {
1925 reg_update_last_request(user_request
);
1926 user_alpha2
[0] = user_request
->alpha2
[0];
1927 user_alpha2
[1] = user_request
->alpha2
[1];
1929 reg_free_request(user_request
);
1933 static enum reg_request_treatment
1934 __reg_process_hint_driver(struct regulatory_request
*driver_request
)
1936 struct regulatory_request
*lr
= get_last_request();
1938 if (lr
->initiator
== NL80211_REGDOM_SET_BY_CORE
) {
1939 if (regdom_changes(driver_request
->alpha2
))
1941 return REG_REQ_ALREADY_SET
;
1945 * This would happen if you unplug and plug your card
1946 * back in or if you add a new device for which the previously
1947 * loaded card also agrees on the regulatory domain.
1949 if (lr
->initiator
== NL80211_REGDOM_SET_BY_DRIVER
&&
1950 !regdom_changes(driver_request
->alpha2
))
1951 return REG_REQ_ALREADY_SET
;
1953 return REG_REQ_INTERSECT
;
1957 * reg_process_hint_driver - process driver regulatory requests
1958 * @driver_request: a pending driver regulatory request
1960 * The wireless subsystem can use this function to process
1961 * a regulatory request issued by an 802.11 driver.
1963 * Returns one of the different reg request treatment values.
1965 static enum reg_request_treatment
1966 reg_process_hint_driver(struct wiphy
*wiphy
,
1967 struct regulatory_request
*driver_request
)
1969 const struct ieee80211_regdomain
*regd
, *tmp
;
1970 enum reg_request_treatment treatment
;
1972 treatment
= __reg_process_hint_driver(driver_request
);
1974 switch (treatment
) {
1977 case REG_REQ_IGNORE
:
1978 reg_free_request(driver_request
);
1980 case REG_REQ_INTERSECT
:
1982 case REG_REQ_ALREADY_SET
:
1983 regd
= reg_copy_regd(get_cfg80211_regdom());
1985 reg_free_request(driver_request
);
1986 return REG_REQ_IGNORE
;
1989 tmp
= get_wiphy_regdom(wiphy
);
1990 rcu_assign_pointer(wiphy
->regd
, regd
);
1991 rcu_free_regdom(tmp
);
1995 driver_request
->intersect
= treatment
== REG_REQ_INTERSECT
;
1996 driver_request
->processed
= false;
1999 * Since CRDA will not be called in this case as we already
2000 * have applied the requested regulatory domain before we just
2001 * inform userspace we have processed the request
2003 if (treatment
== REG_REQ_ALREADY_SET
) {
2004 nl80211_send_reg_change_event(driver_request
);
2005 reg_update_last_request(driver_request
);
2006 reg_set_request_processed();
2010 if (reg_call_crda(driver_request
))
2011 reg_update_last_request(driver_request
);
2013 reg_free_request(driver_request
);
2018 static enum reg_request_treatment
2019 __reg_process_hint_country_ie(struct wiphy
*wiphy
,
2020 struct regulatory_request
*country_ie_request
)
2022 struct wiphy
*last_wiphy
= NULL
;
2023 struct regulatory_request
*lr
= get_last_request();
2025 if (reg_request_cell_base(lr
)) {
2026 /* Trust a Cell base station over the AP's country IE */
2027 if (regdom_changes(country_ie_request
->alpha2
))
2028 return REG_REQ_IGNORE
;
2029 return REG_REQ_ALREADY_SET
;
2031 if (wiphy
->regulatory_flags
& REGULATORY_COUNTRY_IE_IGNORE
)
2032 return REG_REQ_IGNORE
;
2035 if (unlikely(!is_an_alpha2(country_ie_request
->alpha2
)))
2038 if (lr
->initiator
!= NL80211_REGDOM_SET_BY_COUNTRY_IE
)
2041 last_wiphy
= wiphy_idx_to_wiphy(lr
->wiphy_idx
);
2043 if (last_wiphy
!= wiphy
) {
2045 * Two cards with two APs claiming different
2046 * Country IE alpha2s. We could
2047 * intersect them, but that seems unlikely
2048 * to be correct. Reject second one for now.
2050 if (regdom_changes(country_ie_request
->alpha2
))
2051 return REG_REQ_IGNORE
;
2052 return REG_REQ_ALREADY_SET
;
2055 if (regdom_changes(country_ie_request
->alpha2
))
2057 return REG_REQ_ALREADY_SET
;
2061 * reg_process_hint_country_ie - process regulatory requests from country IEs
2062 * @country_ie_request: a regulatory request from a country IE
2064 * The wireless subsystem can use this function to process
2065 * a regulatory request issued by a country Information Element.
2067 * Returns one of the different reg request treatment values.
2069 static enum reg_request_treatment
2070 reg_process_hint_country_ie(struct wiphy
*wiphy
,
2071 struct regulatory_request
*country_ie_request
)
2073 enum reg_request_treatment treatment
;
2075 treatment
= __reg_process_hint_country_ie(wiphy
, country_ie_request
);
2077 switch (treatment
) {
2080 case REG_REQ_IGNORE
:
2082 case REG_REQ_ALREADY_SET
:
2083 reg_free_request(country_ie_request
);
2085 case REG_REQ_INTERSECT
:
2086 reg_free_request(country_ie_request
);
2088 * This doesn't happen yet, not sure we
2089 * ever want to support it for this case.
2091 WARN_ONCE(1, "Unexpected intersection for country IEs");
2092 return REG_REQ_IGNORE
;
2095 country_ie_request
->intersect
= false;
2096 country_ie_request
->processed
= false;
2098 if (reg_call_crda(country_ie_request
))
2099 reg_update_last_request(country_ie_request
);
2101 reg_free_request(country_ie_request
);
2106 /* This processes *all* regulatory hints */
2107 static void reg_process_hint(struct regulatory_request
*reg_request
)
2109 struct wiphy
*wiphy
= NULL
;
2110 enum reg_request_treatment treatment
;
2112 if (reg_request
->wiphy_idx
!= WIPHY_IDX_INVALID
)
2113 wiphy
= wiphy_idx_to_wiphy(reg_request
->wiphy_idx
);
2115 switch (reg_request
->initiator
) {
2116 case NL80211_REGDOM_SET_BY_CORE
:
2117 reg_process_hint_core(reg_request
);
2119 case NL80211_REGDOM_SET_BY_USER
:
2120 reg_process_hint_user(reg_request
);
2122 case NL80211_REGDOM_SET_BY_DRIVER
:
2125 treatment
= reg_process_hint_driver(wiphy
, reg_request
);
2127 case NL80211_REGDOM_SET_BY_COUNTRY_IE
:
2130 treatment
= reg_process_hint_country_ie(wiphy
, reg_request
);
2133 WARN(1, "invalid initiator %d\n", reg_request
->initiator
);
2137 /* This is required so that the orig_* parameters are saved.
2138 * NOTE: treatment must be set for any case that reaches here!
2140 if (treatment
== REG_REQ_ALREADY_SET
&& wiphy
&&
2141 wiphy
->regulatory_flags
& REGULATORY_STRICT_REG
) {
2142 wiphy_update_regulatory(wiphy
, reg_request
->initiator
);
2143 reg_check_channels();
2149 reg_free_request(reg_request
);
2152 static bool reg_only_self_managed_wiphys(void)
2154 struct cfg80211_registered_device
*rdev
;
2155 struct wiphy
*wiphy
;
2156 bool self_managed_found
= false;
2160 list_for_each_entry(rdev
, &cfg80211_rdev_list
, list
) {
2161 wiphy
= &rdev
->wiphy
;
2162 if (wiphy
->regulatory_flags
& REGULATORY_WIPHY_SELF_MANAGED
)
2163 self_managed_found
= true;
2168 /* make sure at least one self-managed wiphy exists */
2169 return self_managed_found
;
2173 * Processes regulatory hints, this is all the NL80211_REGDOM_SET_BY_*
2174 * Regulatory hints come on a first come first serve basis and we
2175 * must process each one atomically.
2177 static void reg_process_pending_hints(void)
2179 struct regulatory_request
*reg_request
, *lr
;
2181 lr
= get_last_request();
2183 /* When last_request->processed becomes true this will be rescheduled */
2184 if (lr
&& !lr
->processed
) {
2185 reg_process_hint(lr
);
2189 spin_lock(®_requests_lock
);
2191 if (list_empty(®_requests_list
)) {
2192 spin_unlock(®_requests_lock
);
2196 reg_request
= list_first_entry(®_requests_list
,
2197 struct regulatory_request
,
2199 list_del_init(®_request
->list
);
2201 spin_unlock(®_requests_lock
);
2203 if (reg_only_self_managed_wiphys()) {
2204 reg_free_request(reg_request
);
2208 reg_process_hint(reg_request
);
2210 lr
= get_last_request();
2212 spin_lock(®_requests_lock
);
2213 if (!list_empty(®_requests_list
) && lr
&& lr
->processed
)
2214 schedule_work(®_work
);
2215 spin_unlock(®_requests_lock
);
2218 /* Processes beacon hints -- this has nothing to do with country IEs */
2219 static void reg_process_pending_beacon_hints(void)
2221 struct cfg80211_registered_device
*rdev
;
2222 struct reg_beacon
*pending_beacon
, *tmp
;
2224 /* This goes through the _pending_ beacon list */
2225 spin_lock_bh(®_pending_beacons_lock
);
2227 list_for_each_entry_safe(pending_beacon
, tmp
,
2228 ®_pending_beacons
, list
) {
2229 list_del_init(&pending_beacon
->list
);
2231 /* Applies the beacon hint to current wiphys */
2232 list_for_each_entry(rdev
, &cfg80211_rdev_list
, list
)
2233 wiphy_update_new_beacon(&rdev
->wiphy
, pending_beacon
);
2235 /* Remembers the beacon hint for new wiphys or reg changes */
2236 list_add_tail(&pending_beacon
->list
, ®_beacon_list
);
2239 spin_unlock_bh(®_pending_beacons_lock
);
2242 static void reg_process_self_managed_hints(void)
2244 struct cfg80211_registered_device
*rdev
;
2245 struct wiphy
*wiphy
;
2246 const struct ieee80211_regdomain
*tmp
;
2247 const struct ieee80211_regdomain
*regd
;
2248 enum ieee80211_band band
;
2249 struct regulatory_request request
= {};
2251 list_for_each_entry(rdev
, &cfg80211_rdev_list
, list
) {
2252 wiphy
= &rdev
->wiphy
;
2254 spin_lock(®_requests_lock
);
2255 regd
= rdev
->requested_regd
;
2256 rdev
->requested_regd
= NULL
;
2257 spin_unlock(®_requests_lock
);
2262 tmp
= get_wiphy_regdom(wiphy
);
2263 rcu_assign_pointer(wiphy
->regd
, regd
);
2264 rcu_free_regdom(tmp
);
2266 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++)
2267 handle_band_custom(wiphy
, wiphy
->bands
[band
], regd
);
2269 reg_process_ht_flags(wiphy
);
2271 request
.wiphy_idx
= get_wiphy_idx(wiphy
);
2272 request
.alpha2
[0] = regd
->alpha2
[0];
2273 request
.alpha2
[1] = regd
->alpha2
[1];
2274 request
.initiator
= NL80211_REGDOM_SET_BY_DRIVER
;
2276 nl80211_send_wiphy_reg_change_event(&request
);
2279 reg_check_channels();
2282 static void reg_todo(struct work_struct
*work
)
2285 reg_process_pending_hints();
2286 reg_process_pending_beacon_hints();
2287 reg_process_self_managed_hints();
2291 static void queue_regulatory_request(struct regulatory_request
*request
)
2293 request
->alpha2
[0] = toupper(request
->alpha2
[0]);
2294 request
->alpha2
[1] = toupper(request
->alpha2
[1]);
2296 spin_lock(®_requests_lock
);
2297 list_add_tail(&request
->list
, ®_requests_list
);
2298 spin_unlock(®_requests_lock
);
2300 schedule_work(®_work
);
2304 * Core regulatory hint -- happens during cfg80211_init()
2305 * and when we restore regulatory settings.
2307 static int regulatory_hint_core(const char *alpha2
)
2309 struct regulatory_request
*request
;
2311 request
= kzalloc(sizeof(struct regulatory_request
), GFP_KERNEL
);
2315 request
->alpha2
[0] = alpha2
[0];
2316 request
->alpha2
[1] = alpha2
[1];
2317 request
->initiator
= NL80211_REGDOM_SET_BY_CORE
;
2319 queue_regulatory_request(request
);
2325 int regulatory_hint_user(const char *alpha2
,
2326 enum nl80211_user_reg_hint_type user_reg_hint_type
)
2328 struct regulatory_request
*request
;
2330 if (WARN_ON(!alpha2
))
2333 request
= kzalloc(sizeof(struct regulatory_request
), GFP_KERNEL
);
2337 request
->wiphy_idx
= WIPHY_IDX_INVALID
;
2338 request
->alpha2
[0] = alpha2
[0];
2339 request
->alpha2
[1] = alpha2
[1];
2340 request
->initiator
= NL80211_REGDOM_SET_BY_USER
;
2341 request
->user_reg_hint_type
= user_reg_hint_type
;
2343 /* Allow calling CRDA again */
2344 reg_crda_timeouts
= 0;
2346 queue_regulatory_request(request
);
2351 int regulatory_hint_indoor(bool is_indoor
, u32 portid
)
2353 spin_lock(®_indoor_lock
);
2355 /* It is possible that more than one user space process is trying to
2356 * configure the indoor setting. To handle such cases, clear the indoor
2357 * setting in case that some process does not think that the device
2358 * is operating in an indoor environment. In addition, if a user space
2359 * process indicates that it is controlling the indoor setting, save its
2360 * portid, i.e., make it the owner.
2362 reg_is_indoor
= is_indoor
;
2363 if (reg_is_indoor
) {
2364 if (!reg_is_indoor_portid
)
2365 reg_is_indoor_portid
= portid
;
2367 reg_is_indoor_portid
= 0;
2370 spin_unlock(®_indoor_lock
);
2373 reg_check_channels();
2378 void regulatory_netlink_notify(u32 portid
)
2380 spin_lock(®_indoor_lock
);
2382 if (reg_is_indoor_portid
!= portid
) {
2383 spin_unlock(®_indoor_lock
);
2387 reg_is_indoor
= false;
2388 reg_is_indoor_portid
= 0;
2390 spin_unlock(®_indoor_lock
);
2392 reg_check_channels();
2396 int regulatory_hint(struct wiphy
*wiphy
, const char *alpha2
)
2398 struct regulatory_request
*request
;
2400 if (WARN_ON(!alpha2
|| !wiphy
))
2403 wiphy
->regulatory_flags
&= ~REGULATORY_CUSTOM_REG
;
2405 request
= kzalloc(sizeof(struct regulatory_request
), GFP_KERNEL
);
2409 request
->wiphy_idx
= get_wiphy_idx(wiphy
);
2411 request
->alpha2
[0] = alpha2
[0];
2412 request
->alpha2
[1] = alpha2
[1];
2413 request
->initiator
= NL80211_REGDOM_SET_BY_DRIVER
;
2415 /* Allow calling CRDA again */
2416 reg_crda_timeouts
= 0;
2418 queue_regulatory_request(request
);
2422 EXPORT_SYMBOL(regulatory_hint
);
2424 void regulatory_hint_country_ie(struct wiphy
*wiphy
, enum ieee80211_band band
,
2425 const u8
*country_ie
, u8 country_ie_len
)
2428 enum environment_cap env
= ENVIRON_ANY
;
2429 struct regulatory_request
*request
= NULL
, *lr
;
2431 /* IE len must be evenly divisible by 2 */
2432 if (country_ie_len
& 0x01)
2435 if (country_ie_len
< IEEE80211_COUNTRY_IE_MIN_LEN
)
2438 request
= kzalloc(sizeof(*request
), GFP_KERNEL
);
2442 alpha2
[0] = country_ie
[0];
2443 alpha2
[1] = country_ie
[1];
2445 if (country_ie
[2] == 'I')
2446 env
= ENVIRON_INDOOR
;
2447 else if (country_ie
[2] == 'O')
2448 env
= ENVIRON_OUTDOOR
;
2451 lr
= get_last_request();
2457 * We will run this only upon a successful connection on cfg80211.
2458 * We leave conflict resolution to the workqueue, where can hold
2461 if (lr
->initiator
== NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
2462 lr
->wiphy_idx
!= WIPHY_IDX_INVALID
)
2465 request
->wiphy_idx
= get_wiphy_idx(wiphy
);
2466 request
->alpha2
[0] = alpha2
[0];
2467 request
->alpha2
[1] = alpha2
[1];
2468 request
->initiator
= NL80211_REGDOM_SET_BY_COUNTRY_IE
;
2469 request
->country_ie_env
= env
;
2471 /* Allow calling CRDA again */
2472 reg_crda_timeouts
= 0;
2474 queue_regulatory_request(request
);
2481 static void restore_alpha2(char *alpha2
, bool reset_user
)
2483 /* indicates there is no alpha2 to consider for restoration */
2487 /* The user setting has precedence over the module parameter */
2488 if (is_user_regdom_saved()) {
2489 /* Unless we're asked to ignore it and reset it */
2491 REG_DBG_PRINT("Restoring regulatory settings including user preference\n");
2492 user_alpha2
[0] = '9';
2493 user_alpha2
[1] = '7';
2496 * If we're ignoring user settings, we still need to
2497 * check the module parameter to ensure we put things
2498 * back as they were for a full restore.
2500 if (!is_world_regdom(ieee80211_regdom
)) {
2501 REG_DBG_PRINT("Keeping preference on module parameter ieee80211_regdom: %c%c\n",
2502 ieee80211_regdom
[0], ieee80211_regdom
[1]);
2503 alpha2
[0] = ieee80211_regdom
[0];
2504 alpha2
[1] = ieee80211_regdom
[1];
2507 REG_DBG_PRINT("Restoring regulatory settings while preserving user preference for: %c%c\n",
2508 user_alpha2
[0], user_alpha2
[1]);
2509 alpha2
[0] = user_alpha2
[0];
2510 alpha2
[1] = user_alpha2
[1];
2512 } else if (!is_world_regdom(ieee80211_regdom
)) {
2513 REG_DBG_PRINT("Keeping preference on module parameter ieee80211_regdom: %c%c\n",
2514 ieee80211_regdom
[0], ieee80211_regdom
[1]);
2515 alpha2
[0] = ieee80211_regdom
[0];
2516 alpha2
[1] = ieee80211_regdom
[1];
2518 REG_DBG_PRINT("Restoring regulatory settings\n");
2521 static void restore_custom_reg_settings(struct wiphy
*wiphy
)
2523 struct ieee80211_supported_band
*sband
;
2524 enum ieee80211_band band
;
2525 struct ieee80211_channel
*chan
;
2528 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++) {
2529 sband
= wiphy
->bands
[band
];
2532 for (i
= 0; i
< sband
->n_channels
; i
++) {
2533 chan
= &sband
->channels
[i
];
2534 chan
->flags
= chan
->orig_flags
;
2535 chan
->max_antenna_gain
= chan
->orig_mag
;
2536 chan
->max_power
= chan
->orig_mpwr
;
2537 chan
->beacon_found
= false;
2543 * Restoring regulatory settings involves ingoring any
2544 * possibly stale country IE information and user regulatory
2545 * settings if so desired, this includes any beacon hints
2546 * learned as we could have traveled outside to another country
2547 * after disconnection. To restore regulatory settings we do
2548 * exactly what we did at bootup:
2550 * - send a core regulatory hint
2551 * - send a user regulatory hint if applicable
2553 * Device drivers that send a regulatory hint for a specific country
2554 * keep their own regulatory domain on wiphy->regd so that does does
2555 * not need to be remembered.
2557 static void restore_regulatory_settings(bool reset_user
)
2560 char world_alpha2
[2];
2561 struct reg_beacon
*reg_beacon
, *btmp
;
2562 LIST_HEAD(tmp_reg_req_list
);
2563 struct cfg80211_registered_device
*rdev
;
2568 * Clear the indoor setting in case that it is not controlled by user
2569 * space, as otherwise there is no guarantee that the device is still
2570 * operating in an indoor environment.
2572 spin_lock(®_indoor_lock
);
2573 if (reg_is_indoor
&& !reg_is_indoor_portid
) {
2574 reg_is_indoor
= false;
2575 reg_check_channels();
2577 spin_unlock(®_indoor_lock
);
2579 reset_regdomains(true, &world_regdom
);
2580 restore_alpha2(alpha2
, reset_user
);
2583 * If there's any pending requests we simply
2584 * stash them to a temporary pending queue and
2585 * add then after we've restored regulatory
2588 spin_lock(®_requests_lock
);
2589 list_splice_tail_init(®_requests_list
, &tmp_reg_req_list
);
2590 spin_unlock(®_requests_lock
);
2592 /* Clear beacon hints */
2593 spin_lock_bh(®_pending_beacons_lock
);
2594 list_for_each_entry_safe(reg_beacon
, btmp
, ®_pending_beacons
, list
) {
2595 list_del(®_beacon
->list
);
2598 spin_unlock_bh(®_pending_beacons_lock
);
2600 list_for_each_entry_safe(reg_beacon
, btmp
, ®_beacon_list
, list
) {
2601 list_del(®_beacon
->list
);
2605 /* First restore to the basic regulatory settings */
2606 world_alpha2
[0] = cfg80211_world_regdom
->alpha2
[0];
2607 world_alpha2
[1] = cfg80211_world_regdom
->alpha2
[1];
2609 list_for_each_entry(rdev
, &cfg80211_rdev_list
, list
) {
2610 if (rdev
->wiphy
.regulatory_flags
& REGULATORY_WIPHY_SELF_MANAGED
)
2612 if (rdev
->wiphy
.regulatory_flags
& REGULATORY_CUSTOM_REG
)
2613 restore_custom_reg_settings(&rdev
->wiphy
);
2616 regulatory_hint_core(world_alpha2
);
2619 * This restores the ieee80211_regdom module parameter
2620 * preference or the last user requested regulatory
2621 * settings, user regulatory settings takes precedence.
2623 if (is_an_alpha2(alpha2
))
2624 regulatory_hint_user(alpha2
, NL80211_USER_REG_HINT_USER
);
2626 spin_lock(®_requests_lock
);
2627 list_splice_tail_init(&tmp_reg_req_list
, ®_requests_list
);
2628 spin_unlock(®_requests_lock
);
2630 REG_DBG_PRINT("Kicking the queue\n");
2632 schedule_work(®_work
);
2635 void regulatory_hint_disconnect(void)
2637 REG_DBG_PRINT("All devices are disconnected, going to restore regulatory settings\n");
2638 restore_regulatory_settings(false);
2641 static bool freq_is_chan_12_13_14(u16 freq
)
2643 if (freq
== ieee80211_channel_to_frequency(12, IEEE80211_BAND_2GHZ
) ||
2644 freq
== ieee80211_channel_to_frequency(13, IEEE80211_BAND_2GHZ
) ||
2645 freq
== ieee80211_channel_to_frequency(14, IEEE80211_BAND_2GHZ
))
2650 static bool pending_reg_beacon(struct ieee80211_channel
*beacon_chan
)
2652 struct reg_beacon
*pending_beacon
;
2654 list_for_each_entry(pending_beacon
, ®_pending_beacons
, list
)
2655 if (beacon_chan
->center_freq
==
2656 pending_beacon
->chan
.center_freq
)
2661 int regulatory_hint_found_beacon(struct wiphy
*wiphy
,
2662 struct ieee80211_channel
*beacon_chan
,
2665 struct reg_beacon
*reg_beacon
;
2668 if (beacon_chan
->beacon_found
||
2669 beacon_chan
->flags
& IEEE80211_CHAN_RADAR
||
2670 (beacon_chan
->band
== IEEE80211_BAND_2GHZ
&&
2671 !freq_is_chan_12_13_14(beacon_chan
->center_freq
)))
2674 spin_lock_bh(®_pending_beacons_lock
);
2675 processing
= pending_reg_beacon(beacon_chan
);
2676 spin_unlock_bh(®_pending_beacons_lock
);
2681 reg_beacon
= kzalloc(sizeof(struct reg_beacon
), gfp
);
2685 REG_DBG_PRINT("Found new beacon on frequency: %d MHz (Ch %d) on %s\n",
2686 beacon_chan
->center_freq
,
2687 ieee80211_frequency_to_channel(beacon_chan
->center_freq
),
2690 memcpy(®_beacon
->chan
, beacon_chan
,
2691 sizeof(struct ieee80211_channel
));
2694 * Since we can be called from BH or and non-BH context
2695 * we must use spin_lock_bh()
2697 spin_lock_bh(®_pending_beacons_lock
);
2698 list_add_tail(®_beacon
->list
, ®_pending_beacons
);
2699 spin_unlock_bh(®_pending_beacons_lock
);
2701 schedule_work(®_work
);
2706 static void print_rd_rules(const struct ieee80211_regdomain
*rd
)
2709 const struct ieee80211_reg_rule
*reg_rule
= NULL
;
2710 const struct ieee80211_freq_range
*freq_range
= NULL
;
2711 const struct ieee80211_power_rule
*power_rule
= NULL
;
2712 char bw
[32], cac_time
[32];
2714 pr_info(" (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp), (dfs_cac_time)\n");
2716 for (i
= 0; i
< rd
->n_reg_rules
; i
++) {
2717 reg_rule
= &rd
->reg_rules
[i
];
2718 freq_range
= ®_rule
->freq_range
;
2719 power_rule
= ®_rule
->power_rule
;
2721 if (reg_rule
->flags
& NL80211_RRF_AUTO_BW
)
2722 snprintf(bw
, sizeof(bw
), "%d KHz, %d KHz AUTO",
2723 freq_range
->max_bandwidth_khz
,
2724 reg_get_max_bandwidth(rd
, reg_rule
));
2726 snprintf(bw
, sizeof(bw
), "%d KHz",
2727 freq_range
->max_bandwidth_khz
);
2729 if (reg_rule
->flags
& NL80211_RRF_DFS
)
2730 scnprintf(cac_time
, sizeof(cac_time
), "%u s",
2731 reg_rule
->dfs_cac_ms
/1000);
2733 scnprintf(cac_time
, sizeof(cac_time
), "N/A");
2737 * There may not be documentation for max antenna gain
2738 * in certain regions
2740 if (power_rule
->max_antenna_gain
)
2741 pr_info(" (%d KHz - %d KHz @ %s), (%d mBi, %d mBm), (%s)\n",
2742 freq_range
->start_freq_khz
,
2743 freq_range
->end_freq_khz
,
2745 power_rule
->max_antenna_gain
,
2746 power_rule
->max_eirp
,
2749 pr_info(" (%d KHz - %d KHz @ %s), (N/A, %d mBm), (%s)\n",
2750 freq_range
->start_freq_khz
,
2751 freq_range
->end_freq_khz
,
2753 power_rule
->max_eirp
,
2758 bool reg_supported_dfs_region(enum nl80211_dfs_regions dfs_region
)
2760 switch (dfs_region
) {
2761 case NL80211_DFS_UNSET
:
2762 case NL80211_DFS_FCC
:
2763 case NL80211_DFS_ETSI
:
2764 case NL80211_DFS_JP
:
2767 REG_DBG_PRINT("Ignoring uknown DFS master region: %d\n",
2773 static void print_regdomain(const struct ieee80211_regdomain
*rd
)
2775 struct regulatory_request
*lr
= get_last_request();
2777 if (is_intersected_alpha2(rd
->alpha2
)) {
2778 if (lr
->initiator
== NL80211_REGDOM_SET_BY_COUNTRY_IE
) {
2779 struct cfg80211_registered_device
*rdev
;
2780 rdev
= cfg80211_rdev_by_wiphy_idx(lr
->wiphy_idx
);
2782 pr_info("Current regulatory domain updated by AP to: %c%c\n",
2783 rdev
->country_ie_alpha2
[0],
2784 rdev
->country_ie_alpha2
[1]);
2786 pr_info("Current regulatory domain intersected:\n");
2788 pr_info("Current regulatory domain intersected:\n");
2789 } else if (is_world_regdom(rd
->alpha2
)) {
2790 pr_info("World regulatory domain updated:\n");
2792 if (is_unknown_alpha2(rd
->alpha2
))
2793 pr_info("Regulatory domain changed to driver built-in settings (unknown country)\n");
2795 if (reg_request_cell_base(lr
))
2796 pr_info("Regulatory domain changed to country: %c%c by Cell Station\n",
2797 rd
->alpha2
[0], rd
->alpha2
[1]);
2799 pr_info("Regulatory domain changed to country: %c%c\n",
2800 rd
->alpha2
[0], rd
->alpha2
[1]);
2804 pr_info(" DFS Master region: %s", reg_dfs_region_str(rd
->dfs_region
));
2808 static void print_regdomain_info(const struct ieee80211_regdomain
*rd
)
2810 pr_info("Regulatory domain: %c%c\n", rd
->alpha2
[0], rd
->alpha2
[1]);
2814 static int reg_set_rd_core(const struct ieee80211_regdomain
*rd
)
2816 if (!is_world_regdom(rd
->alpha2
))
2818 update_world_regdomain(rd
);
2822 static int reg_set_rd_user(const struct ieee80211_regdomain
*rd
,
2823 struct regulatory_request
*user_request
)
2825 const struct ieee80211_regdomain
*intersected_rd
= NULL
;
2827 if (!regdom_changes(rd
->alpha2
))
2830 if (!is_valid_rd(rd
)) {
2831 pr_err("Invalid regulatory domain detected:\n");
2832 print_regdomain_info(rd
);
2836 if (!user_request
->intersect
) {
2837 reset_regdomains(false, rd
);
2841 intersected_rd
= regdom_intersect(rd
, get_cfg80211_regdom());
2842 if (!intersected_rd
)
2847 reset_regdomains(false, intersected_rd
);
2852 static int reg_set_rd_driver(const struct ieee80211_regdomain
*rd
,
2853 struct regulatory_request
*driver_request
)
2855 const struct ieee80211_regdomain
*regd
;
2856 const struct ieee80211_regdomain
*intersected_rd
= NULL
;
2857 const struct ieee80211_regdomain
*tmp
;
2858 struct wiphy
*request_wiphy
;
2860 if (is_world_regdom(rd
->alpha2
))
2863 if (!regdom_changes(rd
->alpha2
))
2866 if (!is_valid_rd(rd
)) {
2867 pr_err("Invalid regulatory domain detected:\n");
2868 print_regdomain_info(rd
);
2872 request_wiphy
= wiphy_idx_to_wiphy(driver_request
->wiphy_idx
);
2873 if (!request_wiphy
) {
2874 queue_delayed_work(system_power_efficient_wq
,
2879 if (!driver_request
->intersect
) {
2880 if (request_wiphy
->regd
)
2883 regd
= reg_copy_regd(rd
);
2885 return PTR_ERR(regd
);
2887 rcu_assign_pointer(request_wiphy
->regd
, regd
);
2888 reset_regdomains(false, rd
);
2892 intersected_rd
= regdom_intersect(rd
, get_cfg80211_regdom());
2893 if (!intersected_rd
)
2897 * We can trash what CRDA provided now.
2898 * However if a driver requested this specific regulatory
2899 * domain we keep it for its private use
2901 tmp
= get_wiphy_regdom(request_wiphy
);
2902 rcu_assign_pointer(request_wiphy
->regd
, rd
);
2903 rcu_free_regdom(tmp
);
2907 reset_regdomains(false, intersected_rd
);
2912 static int reg_set_rd_country_ie(const struct ieee80211_regdomain
*rd
,
2913 struct regulatory_request
*country_ie_request
)
2915 struct wiphy
*request_wiphy
;
2917 if (!is_alpha2_set(rd
->alpha2
) && !is_an_alpha2(rd
->alpha2
) &&
2918 !is_unknown_alpha2(rd
->alpha2
))
2922 * Lets only bother proceeding on the same alpha2 if the current
2923 * rd is non static (it means CRDA was present and was used last)
2924 * and the pending request came in from a country IE
2927 if (!is_valid_rd(rd
)) {
2928 pr_err("Invalid regulatory domain detected:\n");
2929 print_regdomain_info(rd
);
2933 request_wiphy
= wiphy_idx_to_wiphy(country_ie_request
->wiphy_idx
);
2934 if (!request_wiphy
) {
2935 queue_delayed_work(system_power_efficient_wq
,
2940 if (country_ie_request
->intersect
)
2943 reset_regdomains(false, rd
);
2948 * Use this call to set the current regulatory domain. Conflicts with
2949 * multiple drivers can be ironed out later. Caller must've already
2950 * kmalloc'd the rd structure.
2952 int set_regdom(const struct ieee80211_regdomain
*rd
,
2953 enum ieee80211_regd_source regd_src
)
2955 struct regulatory_request
*lr
;
2956 bool user_reset
= false;
2959 if (!reg_is_valid_request(rd
->alpha2
)) {
2964 if (regd_src
== REGD_SOURCE_CRDA
)
2965 reg_crda_timeouts
= 0;
2967 lr
= get_last_request();
2969 /* Note that this doesn't update the wiphys, this is done below */
2970 switch (lr
->initiator
) {
2971 case NL80211_REGDOM_SET_BY_CORE
:
2972 r
= reg_set_rd_core(rd
);
2974 case NL80211_REGDOM_SET_BY_USER
:
2975 r
= reg_set_rd_user(rd
, lr
);
2978 case NL80211_REGDOM_SET_BY_DRIVER
:
2979 r
= reg_set_rd_driver(rd
, lr
);
2981 case NL80211_REGDOM_SET_BY_COUNTRY_IE
:
2982 r
= reg_set_rd_country_ie(rd
, lr
);
2985 WARN(1, "invalid initiator %d\n", lr
->initiator
);
2992 reg_set_request_processed();
2995 /* Back to world regulatory in case of errors */
2996 restore_regulatory_settings(user_reset
);
3003 /* This would make this whole thing pointless */
3004 if (WARN_ON(!lr
->intersect
&& rd
!= get_cfg80211_regdom()))
3007 /* update all wiphys now with the new established regulatory domain */
3008 update_all_wiphy_regulatory(lr
->initiator
);
3010 print_regdomain(get_cfg80211_regdom());
3012 nl80211_send_reg_change_event(lr
);
3014 reg_set_request_processed();
3019 static int __regulatory_set_wiphy_regd(struct wiphy
*wiphy
,
3020 struct ieee80211_regdomain
*rd
)
3022 const struct ieee80211_regdomain
*regd
;
3023 const struct ieee80211_regdomain
*prev_regd
;
3024 struct cfg80211_registered_device
*rdev
;
3026 if (WARN_ON(!wiphy
|| !rd
))
3029 if (WARN(!(wiphy
->regulatory_flags
& REGULATORY_WIPHY_SELF_MANAGED
),
3030 "wiphy should have REGULATORY_WIPHY_SELF_MANAGED\n"))
3033 if (WARN(!is_valid_rd(rd
), "Invalid regulatory domain detected\n")) {
3034 print_regdomain_info(rd
);
3038 regd
= reg_copy_regd(rd
);
3040 return PTR_ERR(regd
);
3042 rdev
= wiphy_to_rdev(wiphy
);
3044 spin_lock(®_requests_lock
);
3045 prev_regd
= rdev
->requested_regd
;
3046 rdev
->requested_regd
= regd
;
3047 spin_unlock(®_requests_lock
);
3053 int regulatory_set_wiphy_regd(struct wiphy
*wiphy
,
3054 struct ieee80211_regdomain
*rd
)
3056 int ret
= __regulatory_set_wiphy_regd(wiphy
, rd
);
3061 schedule_work(®_work
);
3064 EXPORT_SYMBOL(regulatory_set_wiphy_regd
);
3066 int regulatory_set_wiphy_regd_sync_rtnl(struct wiphy
*wiphy
,
3067 struct ieee80211_regdomain
*rd
)
3073 ret
= __regulatory_set_wiphy_regd(wiphy
, rd
);
3077 /* process the request immediately */
3078 reg_process_self_managed_hints();
3081 EXPORT_SYMBOL(regulatory_set_wiphy_regd_sync_rtnl
);
3083 void wiphy_regulatory_register(struct wiphy
*wiphy
)
3085 struct regulatory_request
*lr
;
3087 /* self-managed devices ignore external hints */
3088 if (wiphy
->regulatory_flags
& REGULATORY_WIPHY_SELF_MANAGED
)
3089 wiphy
->regulatory_flags
|= REGULATORY_DISABLE_BEACON_HINTS
|
3090 REGULATORY_COUNTRY_IE_IGNORE
;
3092 if (!reg_dev_ignore_cell_hint(wiphy
))
3093 reg_num_devs_support_basehint
++;
3095 lr
= get_last_request();
3096 wiphy_update_regulatory(wiphy
, lr
->initiator
);
3099 void wiphy_regulatory_deregister(struct wiphy
*wiphy
)
3101 struct wiphy
*request_wiphy
= NULL
;
3102 struct regulatory_request
*lr
;
3104 lr
= get_last_request();
3106 if (!reg_dev_ignore_cell_hint(wiphy
))
3107 reg_num_devs_support_basehint
--;
3109 rcu_free_regdom(get_wiphy_regdom(wiphy
));
3110 RCU_INIT_POINTER(wiphy
->regd
, NULL
);
3113 request_wiphy
= wiphy_idx_to_wiphy(lr
->wiphy_idx
);
3115 if (!request_wiphy
|| request_wiphy
!= wiphy
)
3118 lr
->wiphy_idx
= WIPHY_IDX_INVALID
;
3119 lr
->country_ie_env
= ENVIRON_ANY
;
3122 static void reg_timeout_work(struct work_struct
*work
)
3124 REG_DBG_PRINT("Timeout while waiting for CRDA to reply, restoring regulatory settings\n");
3126 reg_crda_timeouts
++;
3127 restore_regulatory_settings(true);
3132 * See http://www.fcc.gov/document/5-ghz-unlicensed-spectrum-unii, for
3133 * UNII band definitions
3135 int cfg80211_get_unii(int freq
)
3138 if (freq
>= 5150 && freq
<= 5250)
3142 if (freq
> 5250 && freq
<= 5350)
3146 if (freq
> 5350 && freq
<= 5470)
3150 if (freq
> 5470 && freq
<= 5725)
3154 if (freq
> 5725 && freq
<= 5825)
3160 bool regulatory_indoor_allowed(void)
3162 return reg_is_indoor
;
3165 int __init
regulatory_init(void)
3169 reg_pdev
= platform_device_register_simple("regulatory", 0, NULL
, 0);
3170 if (IS_ERR(reg_pdev
))
3171 return PTR_ERR(reg_pdev
);
3173 spin_lock_init(®_requests_lock
);
3174 spin_lock_init(®_pending_beacons_lock
);
3175 spin_lock_init(®_indoor_lock
);
3177 reg_regdb_size_check();
3179 rcu_assign_pointer(cfg80211_regdomain
, cfg80211_world_regdom
);
3181 user_alpha2
[0] = '9';
3182 user_alpha2
[1] = '7';
3184 /* We always try to get an update for the static regdomain */
3185 err
= regulatory_hint_core(cfg80211_world_regdom
->alpha2
);
3190 * N.B. kobject_uevent_env() can fail mainly for when we're out
3191 * memory which is handled and propagated appropriately above
3192 * but it can also fail during a netlink_broadcast() or during
3193 * early boot for call_usermodehelper(). For now treat these
3194 * errors as non-fatal.
3196 pr_err("kobject_uevent_env() was unable to call CRDA during init\n");
3200 * Finally, if the user set the module parameter treat it
3203 if (!is_world_regdom(ieee80211_regdom
))
3204 regulatory_hint_user(ieee80211_regdom
,
3205 NL80211_USER_REG_HINT_USER
);
3210 void regulatory_exit(void)
3212 struct regulatory_request
*reg_request
, *tmp
;
3213 struct reg_beacon
*reg_beacon
, *btmp
;
3215 cancel_work_sync(®_work
);
3216 cancel_delayed_work_sync(®_timeout
);
3217 cancel_delayed_work_sync(®_check_chans
);
3219 /* Lock to suppress warnings */
3221 reset_regdomains(true, NULL
);
3224 dev_set_uevent_suppress(®_pdev
->dev
, true);
3226 platform_device_unregister(reg_pdev
);
3228 list_for_each_entry_safe(reg_beacon
, btmp
, ®_pending_beacons
, list
) {
3229 list_del(®_beacon
->list
);
3233 list_for_each_entry_safe(reg_beacon
, btmp
, ®_beacon_list
, list
) {
3234 list_del(®_beacon
->list
);
3238 list_for_each_entry_safe(reg_request
, tmp
, ®_requests_list
, list
) {
3239 list_del(®_request
->list
);