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 void restore_regulatory_settings(bool reset_user
);
140 static const struct ieee80211_regdomain
*get_cfg80211_regdom(void)
142 return rtnl_dereference(cfg80211_regdomain
);
145 const struct ieee80211_regdomain
*get_wiphy_regdom(struct wiphy
*wiphy
)
147 return rtnl_dereference(wiphy
->regd
);
150 static const char *reg_dfs_region_str(enum nl80211_dfs_regions dfs_region
)
152 switch (dfs_region
) {
153 case NL80211_DFS_UNSET
:
155 case NL80211_DFS_FCC
:
157 case NL80211_DFS_ETSI
:
165 enum nl80211_dfs_regions
reg_get_dfs_region(struct wiphy
*wiphy
)
167 const struct ieee80211_regdomain
*regd
= NULL
;
168 const struct ieee80211_regdomain
*wiphy_regd
= NULL
;
170 regd
= get_cfg80211_regdom();
174 wiphy_regd
= get_wiphy_regdom(wiphy
);
178 if (wiphy_regd
->dfs_region
== regd
->dfs_region
)
181 REG_DBG_PRINT("%s: device specific dfs_region "
182 "(%s) disagrees with cfg80211's "
183 "central dfs_region (%s)\n",
184 dev_name(&wiphy
->dev
),
185 reg_dfs_region_str(wiphy_regd
->dfs_region
),
186 reg_dfs_region_str(regd
->dfs_region
));
189 return regd
->dfs_region
;
192 static void rcu_free_regdom(const struct ieee80211_regdomain
*r
)
196 kfree_rcu((struct ieee80211_regdomain
*)r
, rcu_head
);
199 static struct regulatory_request
*get_last_request(void)
201 return rcu_dereference_rtnl(last_request
);
204 /* Used to queue up regulatory hints */
205 static LIST_HEAD(reg_requests_list
);
206 static spinlock_t reg_requests_lock
;
208 /* Used to queue up beacon hints for review */
209 static LIST_HEAD(reg_pending_beacons
);
210 static spinlock_t reg_pending_beacons_lock
;
212 /* Used to keep track of processed beacon hints */
213 static LIST_HEAD(reg_beacon_list
);
216 struct list_head list
;
217 struct ieee80211_channel chan
;
220 static void reg_check_chans_work(struct work_struct
*work
);
221 static DECLARE_DELAYED_WORK(reg_check_chans
, reg_check_chans_work
);
223 static void reg_todo(struct work_struct
*work
);
224 static DECLARE_WORK(reg_work
, reg_todo
);
226 /* We keep a static world regulatory domain in case of the absence of CRDA */
227 static const struct ieee80211_regdomain world_regdom
= {
231 /* IEEE 802.11b/g, channels 1..11 */
232 REG_RULE(2412-10, 2462+10, 40, 6, 20, 0),
233 /* IEEE 802.11b/g, channels 12..13. */
234 REG_RULE(2467-10, 2472+10, 40, 6, 20,
236 /* IEEE 802.11 channel 14 - Only JP enables
237 * this and for 802.11b only */
238 REG_RULE(2484-10, 2484+10, 20, 6, 20,
240 NL80211_RRF_NO_OFDM
),
241 /* IEEE 802.11a, channel 36..48 */
242 REG_RULE(5180-10, 5240+10, 160, 6, 20,
245 /* IEEE 802.11a, channel 52..64 - DFS required */
246 REG_RULE(5260-10, 5320+10, 160, 6, 20,
250 /* IEEE 802.11a, channel 100..144 - DFS required */
251 REG_RULE(5500-10, 5720+10, 160, 6, 20,
255 /* IEEE 802.11a, channel 149..165 */
256 REG_RULE(5745-10, 5825+10, 80, 6, 20,
259 /* IEEE 802.11ad (60GHz), channels 1..3 */
260 REG_RULE(56160+2160*1-1080, 56160+2160*3+1080, 2160, 0, 0, 0),
264 /* protected by RTNL */
265 static const struct ieee80211_regdomain
*cfg80211_world_regdom
=
268 static char *ieee80211_regdom
= "00";
269 static char user_alpha2
[2];
271 module_param(ieee80211_regdom
, charp
, 0444);
272 MODULE_PARM_DESC(ieee80211_regdom
, "IEEE 802.11 regulatory domain code");
274 static void reg_free_request(struct regulatory_request
*request
)
276 if (request
== &core_request_world
)
279 if (request
!= get_last_request())
283 static void reg_free_last_request(void)
285 struct regulatory_request
*lr
= get_last_request();
287 if (lr
!= &core_request_world
&& lr
)
288 kfree_rcu(lr
, rcu_head
);
291 static void reg_update_last_request(struct regulatory_request
*request
)
293 struct regulatory_request
*lr
;
295 lr
= get_last_request();
299 reg_free_last_request();
300 rcu_assign_pointer(last_request
, request
);
303 static void reset_regdomains(bool full_reset
,
304 const struct ieee80211_regdomain
*new_regdom
)
306 const struct ieee80211_regdomain
*r
;
310 r
= get_cfg80211_regdom();
312 /* avoid freeing static information or freeing something twice */
313 if (r
== cfg80211_world_regdom
)
315 if (cfg80211_world_regdom
== &world_regdom
)
316 cfg80211_world_regdom
= NULL
;
317 if (r
== &world_regdom
)
321 rcu_free_regdom(cfg80211_world_regdom
);
323 cfg80211_world_regdom
= &world_regdom
;
324 rcu_assign_pointer(cfg80211_regdomain
, new_regdom
);
329 reg_update_last_request(&core_request_world
);
333 * Dynamic world regulatory domain requested by the wireless
334 * core upon initialization
336 static void update_world_regdomain(const struct ieee80211_regdomain
*rd
)
338 struct regulatory_request
*lr
;
340 lr
= get_last_request();
344 reset_regdomains(false, rd
);
346 cfg80211_world_regdom
= rd
;
349 bool is_world_regdom(const char *alpha2
)
353 return alpha2
[0] == '0' && alpha2
[1] == '0';
356 static bool is_alpha2_set(const char *alpha2
)
360 return alpha2
[0] && alpha2
[1];
363 static bool is_unknown_alpha2(const char *alpha2
)
368 * Special case where regulatory domain was built by driver
369 * but a specific alpha2 cannot be determined
371 return alpha2
[0] == '9' && alpha2
[1] == '9';
374 static bool is_intersected_alpha2(const char *alpha2
)
379 * Special case where regulatory domain is the
380 * result of an intersection between two regulatory domain
383 return alpha2
[0] == '9' && alpha2
[1] == '8';
386 static bool is_an_alpha2(const char *alpha2
)
390 return isalpha(alpha2
[0]) && isalpha(alpha2
[1]);
393 static bool alpha2_equal(const char *alpha2_x
, const char *alpha2_y
)
395 if (!alpha2_x
|| !alpha2_y
)
397 return alpha2_x
[0] == alpha2_y
[0] && alpha2_x
[1] == alpha2_y
[1];
400 static bool regdom_changes(const char *alpha2
)
402 const struct ieee80211_regdomain
*r
= get_cfg80211_regdom();
406 return !alpha2_equal(r
->alpha2
, alpha2
);
410 * The NL80211_REGDOM_SET_BY_USER regdom alpha2 is cached, this lets
411 * you know if a valid regulatory hint with NL80211_REGDOM_SET_BY_USER
412 * has ever been issued.
414 static bool is_user_regdom_saved(void)
416 if (user_alpha2
[0] == '9' && user_alpha2
[1] == '7')
419 /* This would indicate a mistake on the design */
420 if (WARN(!is_world_regdom(user_alpha2
) && !is_an_alpha2(user_alpha2
),
421 "Unexpected user alpha2: %c%c\n",
422 user_alpha2
[0], user_alpha2
[1]))
428 static const struct ieee80211_regdomain
*
429 reg_copy_regd(const struct ieee80211_regdomain
*src_regd
)
431 struct ieee80211_regdomain
*regd
;
436 sizeof(struct ieee80211_regdomain
) +
437 src_regd
->n_reg_rules
* sizeof(struct ieee80211_reg_rule
);
439 regd
= kzalloc(size_of_regd
, GFP_KERNEL
);
441 return ERR_PTR(-ENOMEM
);
443 memcpy(regd
, src_regd
, sizeof(struct ieee80211_regdomain
));
445 for (i
= 0; i
< src_regd
->n_reg_rules
; i
++)
446 memcpy(®d
->reg_rules
[i
], &src_regd
->reg_rules
[i
],
447 sizeof(struct ieee80211_reg_rule
));
452 #ifdef CONFIG_CFG80211_INTERNAL_REGDB
453 struct reg_regdb_apply_request
{
454 struct list_head list
;
455 const struct ieee80211_regdomain
*regdom
;
458 static LIST_HEAD(reg_regdb_apply_list
);
459 static DEFINE_MUTEX(reg_regdb_apply_mutex
);
461 static void reg_regdb_apply(struct work_struct
*work
)
463 struct reg_regdb_apply_request
*request
;
467 mutex_lock(®_regdb_apply_mutex
);
468 while (!list_empty(®_regdb_apply_list
)) {
469 request
= list_first_entry(®_regdb_apply_list
,
470 struct reg_regdb_apply_request
,
472 list_del(&request
->list
);
474 set_regdom(request
->regdom
, REGD_SOURCE_INTERNAL_DB
);
477 mutex_unlock(®_regdb_apply_mutex
);
482 static DECLARE_WORK(reg_regdb_work
, reg_regdb_apply
);
484 static int reg_query_builtin(const char *alpha2
)
486 const struct ieee80211_regdomain
*regdom
= NULL
;
487 struct reg_regdb_apply_request
*request
;
490 for (i
= 0; i
< reg_regdb_size
; i
++) {
491 if (alpha2_equal(alpha2
, reg_regdb
[i
]->alpha2
)) {
492 regdom
= reg_regdb
[i
];
500 request
= kzalloc(sizeof(struct reg_regdb_apply_request
), GFP_KERNEL
);
504 request
->regdom
= reg_copy_regd(regdom
);
505 if (IS_ERR_OR_NULL(request
->regdom
)) {
510 mutex_lock(®_regdb_apply_mutex
);
511 list_add_tail(&request
->list
, ®_regdb_apply_list
);
512 mutex_unlock(®_regdb_apply_mutex
);
514 schedule_work(®_regdb_work
);
519 /* Feel free to add any other sanity checks here */
520 static void reg_regdb_size_check(void)
522 /* We should ideally BUILD_BUG_ON() but then random builds would fail */
523 WARN_ONCE(!reg_regdb_size
, "db.txt is empty, you should update it...");
526 static inline void reg_regdb_size_check(void) {}
527 static inline int reg_query_builtin(const char *alpha2
)
531 #endif /* CONFIG_CFG80211_INTERNAL_REGDB */
533 #ifdef CONFIG_CFG80211_CRDA_SUPPORT
534 /* Max number of consecutive attempts to communicate with CRDA */
535 #define REG_MAX_CRDA_TIMEOUTS 10
537 static u32 reg_crda_timeouts
;
539 static void crda_timeout_work(struct work_struct
*work
);
540 static DECLARE_DELAYED_WORK(crda_timeout
, crda_timeout_work
);
542 static void crda_timeout_work(struct work_struct
*work
)
544 REG_DBG_PRINT("Timeout while waiting for CRDA to reply, restoring regulatory settings\n");
547 restore_regulatory_settings(true);
551 static void cancel_crda_timeout(void)
553 cancel_delayed_work(&crda_timeout
);
556 static void cancel_crda_timeout_sync(void)
558 cancel_delayed_work_sync(&crda_timeout
);
561 static void reset_crda_timeouts(void)
563 reg_crda_timeouts
= 0;
567 * This lets us keep regulatory code which is updated on a regulatory
568 * basis in userspace.
570 static int call_crda(const char *alpha2
)
573 char *env
[] = { country
, NULL
};
576 snprintf(country
, sizeof(country
), "COUNTRY=%c%c",
577 alpha2
[0], alpha2
[1]);
579 if (reg_crda_timeouts
> REG_MAX_CRDA_TIMEOUTS
) {
580 pr_debug("Exceeded CRDA call max attempts. Not calling CRDA\n");
584 if (!is_world_regdom((char *) alpha2
))
585 pr_debug("Calling CRDA for country: %c%c\n",
586 alpha2
[0], alpha2
[1]);
588 pr_debug("Calling CRDA to update world regulatory domain\n");
590 ret
= kobject_uevent_env(®_pdev
->dev
.kobj
, KOBJ_CHANGE
, env
);
594 queue_delayed_work(system_power_efficient_wq
,
595 &crda_timeout
, msecs_to_jiffies(3142));
599 static inline void cancel_crda_timeout(void) {}
600 static inline void cancel_crda_timeout_sync(void) {}
601 static inline void reset_crda_timeouts(void) {}
602 static inline int call_crda(const char *alpha2
)
606 #endif /* CONFIG_CFG80211_CRDA_SUPPORT */
608 static bool reg_query_database(struct regulatory_request
*request
)
610 /* query internal regulatory database (if it exists) */
611 if (reg_query_builtin(request
->alpha2
) == 0)
614 if (call_crda(request
->alpha2
) == 0)
620 bool reg_is_valid_request(const char *alpha2
)
622 struct regulatory_request
*lr
= get_last_request();
624 if (!lr
|| lr
->processed
)
627 return alpha2_equal(lr
->alpha2
, alpha2
);
630 static const struct ieee80211_regdomain
*reg_get_regdomain(struct wiphy
*wiphy
)
632 struct regulatory_request
*lr
= get_last_request();
635 * Follow the driver's regulatory domain, if present, unless a country
636 * IE has been processed or a user wants to help complaince further
638 if (lr
->initiator
!= NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
639 lr
->initiator
!= NL80211_REGDOM_SET_BY_USER
&&
641 return get_wiphy_regdom(wiphy
);
643 return get_cfg80211_regdom();
647 reg_get_max_bandwidth_from_range(const struct ieee80211_regdomain
*rd
,
648 const struct ieee80211_reg_rule
*rule
)
650 const struct ieee80211_freq_range
*freq_range
= &rule
->freq_range
;
651 const struct ieee80211_freq_range
*freq_range_tmp
;
652 const struct ieee80211_reg_rule
*tmp
;
653 u32 start_freq
, end_freq
, idx
, no
;
655 for (idx
= 0; idx
< rd
->n_reg_rules
; idx
++)
656 if (rule
== &rd
->reg_rules
[idx
])
659 if (idx
== rd
->n_reg_rules
)
666 tmp
= &rd
->reg_rules
[--no
];
667 freq_range_tmp
= &tmp
->freq_range
;
669 if (freq_range_tmp
->end_freq_khz
< freq_range
->start_freq_khz
)
672 freq_range
= freq_range_tmp
;
675 start_freq
= freq_range
->start_freq_khz
;
678 freq_range
= &rule
->freq_range
;
681 while (no
< rd
->n_reg_rules
- 1) {
682 tmp
= &rd
->reg_rules
[++no
];
683 freq_range_tmp
= &tmp
->freq_range
;
685 if (freq_range_tmp
->start_freq_khz
> freq_range
->end_freq_khz
)
688 freq_range
= freq_range_tmp
;
691 end_freq
= freq_range
->end_freq_khz
;
693 return end_freq
- start_freq
;
696 unsigned int reg_get_max_bandwidth(const struct ieee80211_regdomain
*rd
,
697 const struct ieee80211_reg_rule
*rule
)
699 unsigned int bw
= reg_get_max_bandwidth_from_range(rd
, rule
);
701 if (rule
->flags
& NL80211_RRF_NO_160MHZ
)
702 bw
= min_t(unsigned int, bw
, MHZ_TO_KHZ(80));
703 if (rule
->flags
& NL80211_RRF_NO_80MHZ
)
704 bw
= min_t(unsigned int, bw
, MHZ_TO_KHZ(40));
707 * HT40+/HT40- limits are handled per-channel. Only limit BW if both
710 if (rule
->flags
& NL80211_RRF_NO_HT40MINUS
&&
711 rule
->flags
& NL80211_RRF_NO_HT40PLUS
)
712 bw
= min_t(unsigned int, bw
, MHZ_TO_KHZ(20));
717 /* Sanity check on a regulatory rule */
718 static bool is_valid_reg_rule(const struct ieee80211_reg_rule
*rule
)
720 const struct ieee80211_freq_range
*freq_range
= &rule
->freq_range
;
723 if (freq_range
->start_freq_khz
<= 0 || freq_range
->end_freq_khz
<= 0)
726 if (freq_range
->start_freq_khz
> freq_range
->end_freq_khz
)
729 freq_diff
= freq_range
->end_freq_khz
- freq_range
->start_freq_khz
;
731 if (freq_range
->end_freq_khz
<= freq_range
->start_freq_khz
||
732 freq_range
->max_bandwidth_khz
> freq_diff
)
738 static bool is_valid_rd(const struct ieee80211_regdomain
*rd
)
740 const struct ieee80211_reg_rule
*reg_rule
= NULL
;
743 if (!rd
->n_reg_rules
)
746 if (WARN_ON(rd
->n_reg_rules
> NL80211_MAX_SUPP_REG_RULES
))
749 for (i
= 0; i
< rd
->n_reg_rules
; i
++) {
750 reg_rule
= &rd
->reg_rules
[i
];
751 if (!is_valid_reg_rule(reg_rule
))
758 static bool reg_does_bw_fit(const struct ieee80211_freq_range
*freq_range
,
759 u32 center_freq_khz
, u32 bw_khz
)
761 u32 start_freq_khz
, end_freq_khz
;
763 start_freq_khz
= center_freq_khz
- (bw_khz
/2);
764 end_freq_khz
= center_freq_khz
+ (bw_khz
/2);
766 if (start_freq_khz
>= freq_range
->start_freq_khz
&&
767 end_freq_khz
<= freq_range
->end_freq_khz
)
774 * freq_in_rule_band - tells us if a frequency is in a frequency band
775 * @freq_range: frequency rule we want to query
776 * @freq_khz: frequency we are inquiring about
778 * This lets us know if a specific frequency rule is or is not relevant to
779 * a specific frequency's band. Bands are device specific and artificial
780 * definitions (the "2.4 GHz band", the "5 GHz band" and the "60GHz band"),
781 * however it is safe for now to assume that a frequency rule should not be
782 * part of a frequency's band if the start freq or end freq are off by more
783 * than 2 GHz for the 2.4 and 5 GHz bands, and by more than 10 GHz for the
785 * This resolution can be lowered and should be considered as we add
786 * regulatory rule support for other "bands".
788 static bool freq_in_rule_band(const struct ieee80211_freq_range
*freq_range
,
791 #define ONE_GHZ_IN_KHZ 1000000
793 * From 802.11ad: directional multi-gigabit (DMG):
794 * Pertaining to operation in a frequency band containing a channel
795 * with the Channel starting frequency above 45 GHz.
797 u32 limit
= freq_khz
> 45 * ONE_GHZ_IN_KHZ
?
798 10 * ONE_GHZ_IN_KHZ
: 2 * ONE_GHZ_IN_KHZ
;
799 if (abs(freq_khz
- freq_range
->start_freq_khz
) <= limit
)
801 if (abs(freq_khz
- freq_range
->end_freq_khz
) <= limit
)
804 #undef ONE_GHZ_IN_KHZ
808 * Later on we can perhaps use the more restrictive DFS
809 * region but we don't have information for that yet so
810 * for now simply disallow conflicts.
812 static enum nl80211_dfs_regions
813 reg_intersect_dfs_region(const enum nl80211_dfs_regions dfs_region1
,
814 const enum nl80211_dfs_regions dfs_region2
)
816 if (dfs_region1
!= dfs_region2
)
817 return NL80211_DFS_UNSET
;
822 * Helper for regdom_intersect(), this does the real
823 * mathematical intersection fun
825 static int reg_rules_intersect(const struct ieee80211_regdomain
*rd1
,
826 const struct ieee80211_regdomain
*rd2
,
827 const struct ieee80211_reg_rule
*rule1
,
828 const struct ieee80211_reg_rule
*rule2
,
829 struct ieee80211_reg_rule
*intersected_rule
)
831 const struct ieee80211_freq_range
*freq_range1
, *freq_range2
;
832 struct ieee80211_freq_range
*freq_range
;
833 const struct ieee80211_power_rule
*power_rule1
, *power_rule2
;
834 struct ieee80211_power_rule
*power_rule
;
835 u32 freq_diff
, max_bandwidth1
, max_bandwidth2
;
837 freq_range1
= &rule1
->freq_range
;
838 freq_range2
= &rule2
->freq_range
;
839 freq_range
= &intersected_rule
->freq_range
;
841 power_rule1
= &rule1
->power_rule
;
842 power_rule2
= &rule2
->power_rule
;
843 power_rule
= &intersected_rule
->power_rule
;
845 freq_range
->start_freq_khz
= max(freq_range1
->start_freq_khz
,
846 freq_range2
->start_freq_khz
);
847 freq_range
->end_freq_khz
= min(freq_range1
->end_freq_khz
,
848 freq_range2
->end_freq_khz
);
850 max_bandwidth1
= freq_range1
->max_bandwidth_khz
;
851 max_bandwidth2
= freq_range2
->max_bandwidth_khz
;
853 if (rule1
->flags
& NL80211_RRF_AUTO_BW
)
854 max_bandwidth1
= reg_get_max_bandwidth(rd1
, rule1
);
855 if (rule2
->flags
& NL80211_RRF_AUTO_BW
)
856 max_bandwidth2
= reg_get_max_bandwidth(rd2
, rule2
);
858 freq_range
->max_bandwidth_khz
= min(max_bandwidth1
, max_bandwidth2
);
860 intersected_rule
->flags
= rule1
->flags
| rule2
->flags
;
863 * In case NL80211_RRF_AUTO_BW requested for both rules
864 * set AUTO_BW in intersected rule also. Next we will
865 * calculate BW correctly in handle_channel function.
866 * In other case remove AUTO_BW flag while we calculate
867 * maximum bandwidth correctly and auto calculation is
870 if ((rule1
->flags
& NL80211_RRF_AUTO_BW
) &&
871 (rule2
->flags
& NL80211_RRF_AUTO_BW
))
872 intersected_rule
->flags
|= NL80211_RRF_AUTO_BW
;
874 intersected_rule
->flags
&= ~NL80211_RRF_AUTO_BW
;
876 freq_diff
= freq_range
->end_freq_khz
- freq_range
->start_freq_khz
;
877 if (freq_range
->max_bandwidth_khz
> freq_diff
)
878 freq_range
->max_bandwidth_khz
= freq_diff
;
880 power_rule
->max_eirp
= min(power_rule1
->max_eirp
,
881 power_rule2
->max_eirp
);
882 power_rule
->max_antenna_gain
= min(power_rule1
->max_antenna_gain
,
883 power_rule2
->max_antenna_gain
);
885 intersected_rule
->dfs_cac_ms
= max(rule1
->dfs_cac_ms
,
888 if (!is_valid_reg_rule(intersected_rule
))
894 /* check whether old rule contains new rule */
895 static bool rule_contains(struct ieee80211_reg_rule
*r1
,
896 struct ieee80211_reg_rule
*r2
)
898 /* for simplicity, currently consider only same flags */
899 if (r1
->flags
!= r2
->flags
)
902 /* verify r1 is more restrictive */
903 if ((r1
->power_rule
.max_antenna_gain
>
904 r2
->power_rule
.max_antenna_gain
) ||
905 r1
->power_rule
.max_eirp
> r2
->power_rule
.max_eirp
)
908 /* make sure r2's range is contained within r1 */
909 if (r1
->freq_range
.start_freq_khz
> r2
->freq_range
.start_freq_khz
||
910 r1
->freq_range
.end_freq_khz
< r2
->freq_range
.end_freq_khz
)
913 /* and finally verify that r1.max_bw >= r2.max_bw */
914 if (r1
->freq_range
.max_bandwidth_khz
<
915 r2
->freq_range
.max_bandwidth_khz
)
921 /* add or extend current rules. do nothing if rule is already contained */
922 static void add_rule(struct ieee80211_reg_rule
*rule
,
923 struct ieee80211_reg_rule
*reg_rules
, u32
*n_rules
)
925 struct ieee80211_reg_rule
*tmp_rule
;
928 for (i
= 0; i
< *n_rules
; i
++) {
929 tmp_rule
= ®_rules
[i
];
930 /* rule is already contained - do nothing */
931 if (rule_contains(tmp_rule
, rule
))
934 /* extend rule if possible */
935 if (rule_contains(rule
, tmp_rule
)) {
936 memcpy(tmp_rule
, rule
, sizeof(*rule
));
941 memcpy(®_rules
[*n_rules
], rule
, sizeof(*rule
));
946 * regdom_intersect - do the intersection between two regulatory domains
947 * @rd1: first regulatory domain
948 * @rd2: second regulatory domain
950 * Use this function to get the intersection between two regulatory domains.
951 * Once completed we will mark the alpha2 for the rd as intersected, "98",
952 * as no one single alpha2 can represent this regulatory domain.
954 * Returns a pointer to the regulatory domain structure which will hold the
955 * resulting intersection of rules between rd1 and rd2. We will
956 * kzalloc() this structure for you.
958 static struct ieee80211_regdomain
*
959 regdom_intersect(const struct ieee80211_regdomain
*rd1
,
960 const struct ieee80211_regdomain
*rd2
)
964 unsigned int num_rules
= 0;
965 const struct ieee80211_reg_rule
*rule1
, *rule2
;
966 struct ieee80211_reg_rule intersected_rule
;
967 struct ieee80211_regdomain
*rd
;
973 * First we get a count of the rules we'll need, then we actually
974 * build them. This is to so we can malloc() and free() a
975 * regdomain once. The reason we use reg_rules_intersect() here
976 * is it will return -EINVAL if the rule computed makes no sense.
977 * All rules that do check out OK are valid.
980 for (x
= 0; x
< rd1
->n_reg_rules
; x
++) {
981 rule1
= &rd1
->reg_rules
[x
];
982 for (y
= 0; y
< rd2
->n_reg_rules
; y
++) {
983 rule2
= &rd2
->reg_rules
[y
];
984 if (!reg_rules_intersect(rd1
, rd2
, rule1
, rule2
,
993 size_of_regd
= sizeof(struct ieee80211_regdomain
) +
994 num_rules
* sizeof(struct ieee80211_reg_rule
);
996 rd
= kzalloc(size_of_regd
, GFP_KERNEL
);
1000 for (x
= 0; x
< rd1
->n_reg_rules
; x
++) {
1001 rule1
= &rd1
->reg_rules
[x
];
1002 for (y
= 0; y
< rd2
->n_reg_rules
; y
++) {
1003 rule2
= &rd2
->reg_rules
[y
];
1004 r
= reg_rules_intersect(rd1
, rd2
, rule1
, rule2
,
1007 * No need to memset here the intersected rule here as
1008 * we're not using the stack anymore
1013 add_rule(&intersected_rule
, rd
->reg_rules
,
1018 rd
->alpha2
[0] = '9';
1019 rd
->alpha2
[1] = '8';
1020 rd
->dfs_region
= reg_intersect_dfs_region(rd1
->dfs_region
,
1027 * XXX: add support for the rest of enum nl80211_reg_rule_flags, we may
1028 * want to just have the channel structure use these
1030 static u32
map_regdom_flags(u32 rd_flags
)
1032 u32 channel_flags
= 0;
1033 if (rd_flags
& NL80211_RRF_NO_IR_ALL
)
1034 channel_flags
|= IEEE80211_CHAN_NO_IR
;
1035 if (rd_flags
& NL80211_RRF_DFS
)
1036 channel_flags
|= IEEE80211_CHAN_RADAR
;
1037 if (rd_flags
& NL80211_RRF_NO_OFDM
)
1038 channel_flags
|= IEEE80211_CHAN_NO_OFDM
;
1039 if (rd_flags
& NL80211_RRF_NO_OUTDOOR
)
1040 channel_flags
|= IEEE80211_CHAN_INDOOR_ONLY
;
1041 if (rd_flags
& NL80211_RRF_IR_CONCURRENT
)
1042 channel_flags
|= IEEE80211_CHAN_IR_CONCURRENT
;
1043 if (rd_flags
& NL80211_RRF_NO_HT40MINUS
)
1044 channel_flags
|= IEEE80211_CHAN_NO_HT40MINUS
;
1045 if (rd_flags
& NL80211_RRF_NO_HT40PLUS
)
1046 channel_flags
|= IEEE80211_CHAN_NO_HT40PLUS
;
1047 if (rd_flags
& NL80211_RRF_NO_80MHZ
)
1048 channel_flags
|= IEEE80211_CHAN_NO_80MHZ
;
1049 if (rd_flags
& NL80211_RRF_NO_160MHZ
)
1050 channel_flags
|= IEEE80211_CHAN_NO_160MHZ
;
1051 return channel_flags
;
1054 static const struct ieee80211_reg_rule
*
1055 freq_reg_info_regd(u32 center_freq
,
1056 const struct ieee80211_regdomain
*regd
, u32 bw
)
1059 bool band_rule_found
= false;
1060 bool bw_fits
= false;
1063 return ERR_PTR(-EINVAL
);
1065 for (i
= 0; i
< regd
->n_reg_rules
; i
++) {
1066 const struct ieee80211_reg_rule
*rr
;
1067 const struct ieee80211_freq_range
*fr
= NULL
;
1069 rr
= ®d
->reg_rules
[i
];
1070 fr
= &rr
->freq_range
;
1073 * We only need to know if one frequency rule was
1074 * was in center_freq's band, that's enough, so lets
1075 * not overwrite it once found
1077 if (!band_rule_found
)
1078 band_rule_found
= freq_in_rule_band(fr
, center_freq
);
1080 bw_fits
= reg_does_bw_fit(fr
, center_freq
, bw
);
1082 if (band_rule_found
&& bw_fits
)
1086 if (!band_rule_found
)
1087 return ERR_PTR(-ERANGE
);
1089 return ERR_PTR(-EINVAL
);
1092 static const struct ieee80211_reg_rule
*
1093 __freq_reg_info(struct wiphy
*wiphy
, u32 center_freq
, u32 min_bw
)
1095 const struct ieee80211_regdomain
*regd
= reg_get_regdomain(wiphy
);
1096 const struct ieee80211_reg_rule
*reg_rule
= NULL
;
1099 for (bw
= MHZ_TO_KHZ(20); bw
>= min_bw
; bw
= bw
/ 2) {
1100 reg_rule
= freq_reg_info_regd(center_freq
, regd
, bw
);
1101 if (!IS_ERR(reg_rule
))
1108 const struct ieee80211_reg_rule
*freq_reg_info(struct wiphy
*wiphy
,
1111 return __freq_reg_info(wiphy
, center_freq
, MHZ_TO_KHZ(20));
1113 EXPORT_SYMBOL(freq_reg_info
);
1115 const char *reg_initiator_name(enum nl80211_reg_initiator initiator
)
1117 switch (initiator
) {
1118 case NL80211_REGDOM_SET_BY_CORE
:
1120 case NL80211_REGDOM_SET_BY_USER
:
1122 case NL80211_REGDOM_SET_BY_DRIVER
:
1124 case NL80211_REGDOM_SET_BY_COUNTRY_IE
:
1125 return "country IE";
1131 EXPORT_SYMBOL(reg_initiator_name
);
1133 static void chan_reg_rule_print_dbg(const struct ieee80211_regdomain
*regd
,
1134 struct ieee80211_channel
*chan
,
1135 const struct ieee80211_reg_rule
*reg_rule
)
1137 #ifdef CONFIG_CFG80211_REG_DEBUG
1138 const struct ieee80211_power_rule
*power_rule
;
1139 const struct ieee80211_freq_range
*freq_range
;
1140 char max_antenna_gain
[32], bw
[32];
1142 power_rule
= ®_rule
->power_rule
;
1143 freq_range
= ®_rule
->freq_range
;
1145 if (!power_rule
->max_antenna_gain
)
1146 snprintf(max_antenna_gain
, sizeof(max_antenna_gain
), "N/A");
1148 snprintf(max_antenna_gain
, sizeof(max_antenna_gain
), "%d mBi",
1149 power_rule
->max_antenna_gain
);
1151 if (reg_rule
->flags
& NL80211_RRF_AUTO_BW
)
1152 snprintf(bw
, sizeof(bw
), "%d KHz, %d KHz AUTO",
1153 freq_range
->max_bandwidth_khz
,
1154 reg_get_max_bandwidth(regd
, reg_rule
));
1156 snprintf(bw
, sizeof(bw
), "%d KHz",
1157 freq_range
->max_bandwidth_khz
);
1159 REG_DBG_PRINT("Updating information on frequency %d MHz with regulatory rule:\n",
1162 REG_DBG_PRINT("(%d KHz - %d KHz @ %s), (%s, %d mBm)\n",
1163 freq_range
->start_freq_khz
, freq_range
->end_freq_khz
,
1164 bw
, max_antenna_gain
,
1165 power_rule
->max_eirp
);
1169 static uint32_t reg_rule_to_chan_bw_flags(const struct ieee80211_regdomain
*regd
,
1170 const struct ieee80211_reg_rule
*reg_rule
,
1171 const struct ieee80211_channel
*chan
)
1173 const struct ieee80211_freq_range
*freq_range
= NULL
;
1174 u32 max_bandwidth_khz
, bw_flags
= 0;
1176 freq_range
= ®_rule
->freq_range
;
1178 max_bandwidth_khz
= freq_range
->max_bandwidth_khz
;
1179 /* Check if auto calculation requested */
1180 if (reg_rule
->flags
& NL80211_RRF_AUTO_BW
)
1181 max_bandwidth_khz
= reg_get_max_bandwidth(regd
, reg_rule
);
1183 /* If we get a reg_rule we can assume that at least 5Mhz fit */
1184 if (!reg_does_bw_fit(freq_range
, MHZ_TO_KHZ(chan
->center_freq
),
1186 bw_flags
|= IEEE80211_CHAN_NO_10MHZ
;
1187 if (!reg_does_bw_fit(freq_range
, MHZ_TO_KHZ(chan
->center_freq
),
1189 bw_flags
|= IEEE80211_CHAN_NO_20MHZ
;
1191 if (max_bandwidth_khz
< MHZ_TO_KHZ(10))
1192 bw_flags
|= IEEE80211_CHAN_NO_10MHZ
;
1193 if (max_bandwidth_khz
< MHZ_TO_KHZ(20))
1194 bw_flags
|= IEEE80211_CHAN_NO_20MHZ
;
1195 if (max_bandwidth_khz
< MHZ_TO_KHZ(40))
1196 bw_flags
|= IEEE80211_CHAN_NO_HT40
;
1197 if (max_bandwidth_khz
< MHZ_TO_KHZ(80))
1198 bw_flags
|= IEEE80211_CHAN_NO_80MHZ
;
1199 if (max_bandwidth_khz
< MHZ_TO_KHZ(160))
1200 bw_flags
|= IEEE80211_CHAN_NO_160MHZ
;
1205 * Note that right now we assume the desired channel bandwidth
1206 * is always 20 MHz for each individual channel (HT40 uses 20 MHz
1207 * per channel, the primary and the extension channel).
1209 static void handle_channel(struct wiphy
*wiphy
,
1210 enum nl80211_reg_initiator initiator
,
1211 struct ieee80211_channel
*chan
)
1213 u32 flags
, bw_flags
= 0;
1214 const struct ieee80211_reg_rule
*reg_rule
= NULL
;
1215 const struct ieee80211_power_rule
*power_rule
= NULL
;
1216 struct wiphy
*request_wiphy
= NULL
;
1217 struct regulatory_request
*lr
= get_last_request();
1218 const struct ieee80211_regdomain
*regd
;
1220 request_wiphy
= wiphy_idx_to_wiphy(lr
->wiphy_idx
);
1222 flags
= chan
->orig_flags
;
1224 reg_rule
= freq_reg_info(wiphy
, MHZ_TO_KHZ(chan
->center_freq
));
1225 if (IS_ERR(reg_rule
)) {
1227 * We will disable all channels that do not match our
1228 * received regulatory rule unless the hint is coming
1229 * from a Country IE and the Country IE had no information
1230 * about a band. The IEEE 802.11 spec allows for an AP
1231 * to send only a subset of the regulatory rules allowed,
1232 * so an AP in the US that only supports 2.4 GHz may only send
1233 * a country IE with information for the 2.4 GHz band
1234 * while 5 GHz is still supported.
1236 if (initiator
== NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
1237 PTR_ERR(reg_rule
) == -ERANGE
)
1240 if (lr
->initiator
== NL80211_REGDOM_SET_BY_DRIVER
&&
1241 request_wiphy
&& request_wiphy
== wiphy
&&
1242 request_wiphy
->regulatory_flags
& REGULATORY_STRICT_REG
) {
1243 REG_DBG_PRINT("Disabling freq %d MHz for good\n",
1245 chan
->orig_flags
|= IEEE80211_CHAN_DISABLED
;
1246 chan
->flags
= chan
->orig_flags
;
1248 REG_DBG_PRINT("Disabling freq %d MHz\n",
1250 chan
->flags
|= IEEE80211_CHAN_DISABLED
;
1255 regd
= reg_get_regdomain(wiphy
);
1256 chan_reg_rule_print_dbg(regd
, chan
, reg_rule
);
1258 power_rule
= ®_rule
->power_rule
;
1259 bw_flags
= reg_rule_to_chan_bw_flags(regd
, reg_rule
, chan
);
1261 if (lr
->initiator
== NL80211_REGDOM_SET_BY_DRIVER
&&
1262 request_wiphy
&& request_wiphy
== wiphy
&&
1263 request_wiphy
->regulatory_flags
& REGULATORY_STRICT_REG
) {
1265 * This guarantees the driver's requested regulatory domain
1266 * will always be used as a base for further regulatory
1269 chan
->flags
= chan
->orig_flags
=
1270 map_regdom_flags(reg_rule
->flags
) | bw_flags
;
1271 chan
->max_antenna_gain
= chan
->orig_mag
=
1272 (int) MBI_TO_DBI(power_rule
->max_antenna_gain
);
1273 chan
->max_reg_power
= chan
->max_power
= chan
->orig_mpwr
=
1274 (int) MBM_TO_DBM(power_rule
->max_eirp
);
1276 if (chan
->flags
& IEEE80211_CHAN_RADAR
) {
1277 chan
->dfs_cac_ms
= IEEE80211_DFS_MIN_CAC_TIME_MS
;
1278 if (reg_rule
->dfs_cac_ms
)
1279 chan
->dfs_cac_ms
= reg_rule
->dfs_cac_ms
;
1285 chan
->dfs_state
= NL80211_DFS_USABLE
;
1286 chan
->dfs_state_entered
= jiffies
;
1288 chan
->beacon_found
= false;
1289 chan
->flags
= flags
| bw_flags
| map_regdom_flags(reg_rule
->flags
);
1290 chan
->max_antenna_gain
=
1291 min_t(int, chan
->orig_mag
,
1292 MBI_TO_DBI(power_rule
->max_antenna_gain
));
1293 chan
->max_reg_power
= (int) MBM_TO_DBM(power_rule
->max_eirp
);
1295 if (chan
->flags
& IEEE80211_CHAN_RADAR
) {
1296 if (reg_rule
->dfs_cac_ms
)
1297 chan
->dfs_cac_ms
= reg_rule
->dfs_cac_ms
;
1299 chan
->dfs_cac_ms
= IEEE80211_DFS_MIN_CAC_TIME_MS
;
1302 if (chan
->orig_mpwr
) {
1304 * Devices that use REGULATORY_COUNTRY_IE_FOLLOW_POWER
1305 * will always follow the passed country IE power settings.
1307 if (initiator
== NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
1308 wiphy
->regulatory_flags
& REGULATORY_COUNTRY_IE_FOLLOW_POWER
)
1309 chan
->max_power
= chan
->max_reg_power
;
1311 chan
->max_power
= min(chan
->orig_mpwr
,
1312 chan
->max_reg_power
);
1314 chan
->max_power
= chan
->max_reg_power
;
1317 static void handle_band(struct wiphy
*wiphy
,
1318 enum nl80211_reg_initiator initiator
,
1319 struct ieee80211_supported_band
*sband
)
1326 for (i
= 0; i
< sband
->n_channels
; i
++)
1327 handle_channel(wiphy
, initiator
, &sband
->channels
[i
]);
1330 static bool reg_request_cell_base(struct regulatory_request
*request
)
1332 if (request
->initiator
!= NL80211_REGDOM_SET_BY_USER
)
1334 return request
->user_reg_hint_type
== NL80211_USER_REG_HINT_CELL_BASE
;
1337 bool reg_last_request_cell_base(void)
1339 return reg_request_cell_base(get_last_request());
1342 #ifdef CONFIG_CFG80211_REG_CELLULAR_HINTS
1343 /* Core specific check */
1344 static enum reg_request_treatment
1345 reg_ignore_cell_hint(struct regulatory_request
*pending_request
)
1347 struct regulatory_request
*lr
= get_last_request();
1349 if (!reg_num_devs_support_basehint
)
1350 return REG_REQ_IGNORE
;
1352 if (reg_request_cell_base(lr
) &&
1353 !regdom_changes(pending_request
->alpha2
))
1354 return REG_REQ_ALREADY_SET
;
1359 /* Device specific check */
1360 static bool reg_dev_ignore_cell_hint(struct wiphy
*wiphy
)
1362 return !(wiphy
->features
& NL80211_FEATURE_CELL_BASE_REG_HINTS
);
1365 static enum reg_request_treatment
1366 reg_ignore_cell_hint(struct regulatory_request
*pending_request
)
1368 return REG_REQ_IGNORE
;
1371 static bool reg_dev_ignore_cell_hint(struct wiphy
*wiphy
)
1377 static bool wiphy_strict_alpha2_regd(struct wiphy
*wiphy
)
1379 if (wiphy
->regulatory_flags
& REGULATORY_STRICT_REG
&&
1380 !(wiphy
->regulatory_flags
& REGULATORY_CUSTOM_REG
))
1385 static bool ignore_reg_update(struct wiphy
*wiphy
,
1386 enum nl80211_reg_initiator initiator
)
1388 struct regulatory_request
*lr
= get_last_request();
1390 if (wiphy
->regulatory_flags
& REGULATORY_WIPHY_SELF_MANAGED
)
1394 REG_DBG_PRINT("Ignoring regulatory request set by %s "
1395 "since last_request is not set\n",
1396 reg_initiator_name(initiator
));
1400 if (initiator
== NL80211_REGDOM_SET_BY_CORE
&&
1401 wiphy
->regulatory_flags
& REGULATORY_CUSTOM_REG
) {
1402 REG_DBG_PRINT("Ignoring regulatory request set by %s "
1403 "since the driver uses its own custom "
1404 "regulatory domain\n",
1405 reg_initiator_name(initiator
));
1410 * wiphy->regd will be set once the device has its own
1411 * desired regulatory domain set
1413 if (wiphy_strict_alpha2_regd(wiphy
) && !wiphy
->regd
&&
1414 initiator
!= NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
1415 !is_world_regdom(lr
->alpha2
)) {
1416 REG_DBG_PRINT("Ignoring regulatory request set by %s "
1417 "since the driver requires its own regulatory "
1418 "domain to be set first\n",
1419 reg_initiator_name(initiator
));
1423 if (reg_request_cell_base(lr
))
1424 return reg_dev_ignore_cell_hint(wiphy
);
1429 static bool reg_is_world_roaming(struct wiphy
*wiphy
)
1431 const struct ieee80211_regdomain
*cr
= get_cfg80211_regdom();
1432 const struct ieee80211_regdomain
*wr
= get_wiphy_regdom(wiphy
);
1433 struct regulatory_request
*lr
= get_last_request();
1435 if (is_world_regdom(cr
->alpha2
) || (wr
&& is_world_regdom(wr
->alpha2
)))
1438 if (lr
&& lr
->initiator
!= NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
1439 wiphy
->regulatory_flags
& REGULATORY_CUSTOM_REG
)
1445 static void handle_reg_beacon(struct wiphy
*wiphy
, unsigned int chan_idx
,
1446 struct reg_beacon
*reg_beacon
)
1448 struct ieee80211_supported_band
*sband
;
1449 struct ieee80211_channel
*chan
;
1450 bool channel_changed
= false;
1451 struct ieee80211_channel chan_before
;
1453 sband
= wiphy
->bands
[reg_beacon
->chan
.band
];
1454 chan
= &sband
->channels
[chan_idx
];
1456 if (likely(chan
->center_freq
!= reg_beacon
->chan
.center_freq
))
1459 if (chan
->beacon_found
)
1462 chan
->beacon_found
= true;
1464 if (!reg_is_world_roaming(wiphy
))
1467 if (wiphy
->regulatory_flags
& REGULATORY_DISABLE_BEACON_HINTS
)
1470 chan_before
.center_freq
= chan
->center_freq
;
1471 chan_before
.flags
= chan
->flags
;
1473 if (chan
->flags
& IEEE80211_CHAN_NO_IR
) {
1474 chan
->flags
&= ~IEEE80211_CHAN_NO_IR
;
1475 channel_changed
= true;
1478 if (channel_changed
)
1479 nl80211_send_beacon_hint_event(wiphy
, &chan_before
, chan
);
1483 * Called when a scan on a wiphy finds a beacon on
1486 static void wiphy_update_new_beacon(struct wiphy
*wiphy
,
1487 struct reg_beacon
*reg_beacon
)
1490 struct ieee80211_supported_band
*sband
;
1492 if (!wiphy
->bands
[reg_beacon
->chan
.band
])
1495 sband
= wiphy
->bands
[reg_beacon
->chan
.band
];
1497 for (i
= 0; i
< sband
->n_channels
; i
++)
1498 handle_reg_beacon(wiphy
, i
, reg_beacon
);
1502 * Called upon reg changes or a new wiphy is added
1504 static void wiphy_update_beacon_reg(struct wiphy
*wiphy
)
1507 struct ieee80211_supported_band
*sband
;
1508 struct reg_beacon
*reg_beacon
;
1510 list_for_each_entry(reg_beacon
, ®_beacon_list
, list
) {
1511 if (!wiphy
->bands
[reg_beacon
->chan
.band
])
1513 sband
= wiphy
->bands
[reg_beacon
->chan
.band
];
1514 for (i
= 0; i
< sband
->n_channels
; i
++)
1515 handle_reg_beacon(wiphy
, i
, reg_beacon
);
1519 /* Reap the advantages of previously found beacons */
1520 static void reg_process_beacons(struct wiphy
*wiphy
)
1523 * Means we are just firing up cfg80211, so no beacons would
1524 * have been processed yet.
1528 wiphy_update_beacon_reg(wiphy
);
1531 static bool is_ht40_allowed(struct ieee80211_channel
*chan
)
1535 if (chan
->flags
& IEEE80211_CHAN_DISABLED
)
1537 /* This would happen when regulatory rules disallow HT40 completely */
1538 if ((chan
->flags
& IEEE80211_CHAN_NO_HT40
) == IEEE80211_CHAN_NO_HT40
)
1543 static void reg_process_ht_flags_channel(struct wiphy
*wiphy
,
1544 struct ieee80211_channel
*channel
)
1546 struct ieee80211_supported_band
*sband
= wiphy
->bands
[channel
->band
];
1547 struct ieee80211_channel
*channel_before
= NULL
, *channel_after
= NULL
;
1550 if (!is_ht40_allowed(channel
)) {
1551 channel
->flags
|= IEEE80211_CHAN_NO_HT40
;
1556 * We need to ensure the extension channels exist to
1557 * be able to use HT40- or HT40+, this finds them (or not)
1559 for (i
= 0; i
< sband
->n_channels
; i
++) {
1560 struct ieee80211_channel
*c
= &sband
->channels
[i
];
1562 if (c
->center_freq
== (channel
->center_freq
- 20))
1564 if (c
->center_freq
== (channel
->center_freq
+ 20))
1569 * Please note that this assumes target bandwidth is 20 MHz,
1570 * if that ever changes we also need to change the below logic
1571 * to include that as well.
1573 if (!is_ht40_allowed(channel_before
))
1574 channel
->flags
|= IEEE80211_CHAN_NO_HT40MINUS
;
1576 channel
->flags
&= ~IEEE80211_CHAN_NO_HT40MINUS
;
1578 if (!is_ht40_allowed(channel_after
))
1579 channel
->flags
|= IEEE80211_CHAN_NO_HT40PLUS
;
1581 channel
->flags
&= ~IEEE80211_CHAN_NO_HT40PLUS
;
1584 static void reg_process_ht_flags_band(struct wiphy
*wiphy
,
1585 struct ieee80211_supported_band
*sband
)
1592 for (i
= 0; i
< sband
->n_channels
; i
++)
1593 reg_process_ht_flags_channel(wiphy
, &sband
->channels
[i
]);
1596 static void reg_process_ht_flags(struct wiphy
*wiphy
)
1598 enum ieee80211_band band
;
1603 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++)
1604 reg_process_ht_flags_band(wiphy
, wiphy
->bands
[band
]);
1607 static void reg_call_notifier(struct wiphy
*wiphy
,
1608 struct regulatory_request
*request
)
1610 if (wiphy
->reg_notifier
)
1611 wiphy
->reg_notifier(wiphy
, request
);
1614 static bool reg_wdev_chan_valid(struct wiphy
*wiphy
, struct wireless_dev
*wdev
)
1616 struct cfg80211_chan_def chandef
;
1617 struct cfg80211_registered_device
*rdev
= wiphy_to_rdev(wiphy
);
1618 enum nl80211_iftype iftype
;
1621 iftype
= wdev
->iftype
;
1623 /* make sure the interface is active */
1624 if (!wdev
->netdev
|| !netif_running(wdev
->netdev
))
1625 goto wdev_inactive_unlock
;
1628 case NL80211_IFTYPE_AP
:
1629 case NL80211_IFTYPE_P2P_GO
:
1630 if (!wdev
->beacon_interval
)
1631 goto wdev_inactive_unlock
;
1632 chandef
= wdev
->chandef
;
1634 case NL80211_IFTYPE_ADHOC
:
1635 if (!wdev
->ssid_len
)
1636 goto wdev_inactive_unlock
;
1637 chandef
= wdev
->chandef
;
1639 case NL80211_IFTYPE_STATION
:
1640 case NL80211_IFTYPE_P2P_CLIENT
:
1641 if (!wdev
->current_bss
||
1642 !wdev
->current_bss
->pub
.channel
)
1643 goto wdev_inactive_unlock
;
1645 if (!rdev
->ops
->get_channel
||
1646 rdev_get_channel(rdev
, wdev
, &chandef
))
1647 cfg80211_chandef_create(&chandef
,
1648 wdev
->current_bss
->pub
.channel
,
1649 NL80211_CHAN_NO_HT
);
1651 case NL80211_IFTYPE_MONITOR
:
1652 case NL80211_IFTYPE_AP_VLAN
:
1653 case NL80211_IFTYPE_P2P_DEVICE
:
1654 /* no enforcement required */
1657 /* others not implemented for now */
1665 case NL80211_IFTYPE_AP
:
1666 case NL80211_IFTYPE_P2P_GO
:
1667 case NL80211_IFTYPE_ADHOC
:
1668 return cfg80211_reg_can_beacon_relax(wiphy
, &chandef
, iftype
);
1669 case NL80211_IFTYPE_STATION
:
1670 case NL80211_IFTYPE_P2P_CLIENT
:
1671 return cfg80211_chandef_usable(wiphy
, &chandef
,
1672 IEEE80211_CHAN_DISABLED
);
1679 wdev_inactive_unlock
:
1684 static void reg_leave_invalid_chans(struct wiphy
*wiphy
)
1686 struct wireless_dev
*wdev
;
1687 struct cfg80211_registered_device
*rdev
= wiphy_to_rdev(wiphy
);
1691 list_for_each_entry(wdev
, &rdev
->wdev_list
, list
)
1692 if (!reg_wdev_chan_valid(wiphy
, wdev
))
1693 cfg80211_leave(rdev
, wdev
);
1696 static void reg_check_chans_work(struct work_struct
*work
)
1698 struct cfg80211_registered_device
*rdev
;
1700 REG_DBG_PRINT("Verifying active interfaces after reg change\n");
1703 list_for_each_entry(rdev
, &cfg80211_rdev_list
, list
)
1704 if (!(rdev
->wiphy
.regulatory_flags
&
1705 REGULATORY_IGNORE_STALE_KICKOFF
))
1706 reg_leave_invalid_chans(&rdev
->wiphy
);
1711 static void reg_check_channels(void)
1714 * Give usermode a chance to do something nicer (move to another
1715 * channel, orderly disconnection), before forcing a disconnection.
1717 mod_delayed_work(system_power_efficient_wq
,
1719 msecs_to_jiffies(REG_ENFORCE_GRACE_MS
));
1722 static void wiphy_update_regulatory(struct wiphy
*wiphy
,
1723 enum nl80211_reg_initiator initiator
)
1725 enum ieee80211_band band
;
1726 struct regulatory_request
*lr
= get_last_request();
1728 if (ignore_reg_update(wiphy
, initiator
)) {
1730 * Regulatory updates set by CORE are ignored for custom
1731 * regulatory cards. Let us notify the changes to the driver,
1732 * as some drivers used this to restore its orig_* reg domain.
1734 if (initiator
== NL80211_REGDOM_SET_BY_CORE
&&
1735 wiphy
->regulatory_flags
& REGULATORY_CUSTOM_REG
)
1736 reg_call_notifier(wiphy
, lr
);
1740 lr
->dfs_region
= get_cfg80211_regdom()->dfs_region
;
1742 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++)
1743 handle_band(wiphy
, initiator
, wiphy
->bands
[band
]);
1745 reg_process_beacons(wiphy
);
1746 reg_process_ht_flags(wiphy
);
1747 reg_call_notifier(wiphy
, lr
);
1750 static void update_all_wiphy_regulatory(enum nl80211_reg_initiator initiator
)
1752 struct cfg80211_registered_device
*rdev
;
1753 struct wiphy
*wiphy
;
1757 list_for_each_entry(rdev
, &cfg80211_rdev_list
, list
) {
1758 wiphy
= &rdev
->wiphy
;
1759 wiphy_update_regulatory(wiphy
, initiator
);
1762 reg_check_channels();
1765 static void handle_channel_custom(struct wiphy
*wiphy
,
1766 struct ieee80211_channel
*chan
,
1767 const struct ieee80211_regdomain
*regd
)
1770 const struct ieee80211_reg_rule
*reg_rule
= NULL
;
1771 const struct ieee80211_power_rule
*power_rule
= NULL
;
1774 for (bw
= MHZ_TO_KHZ(20); bw
>= MHZ_TO_KHZ(5); bw
= bw
/ 2) {
1775 reg_rule
= freq_reg_info_regd(MHZ_TO_KHZ(chan
->center_freq
),
1777 if (!IS_ERR(reg_rule
))
1781 if (IS_ERR(reg_rule
)) {
1782 REG_DBG_PRINT("Disabling freq %d MHz as custom regd has no rule that fits it\n",
1784 if (wiphy
->regulatory_flags
& REGULATORY_WIPHY_SELF_MANAGED
) {
1785 chan
->flags
|= IEEE80211_CHAN_DISABLED
;
1787 chan
->orig_flags
|= IEEE80211_CHAN_DISABLED
;
1788 chan
->flags
= chan
->orig_flags
;
1793 chan_reg_rule_print_dbg(regd
, chan
, reg_rule
);
1795 power_rule
= ®_rule
->power_rule
;
1796 bw_flags
= reg_rule_to_chan_bw_flags(regd
, reg_rule
, chan
);
1798 chan
->dfs_state_entered
= jiffies
;
1799 chan
->dfs_state
= NL80211_DFS_USABLE
;
1801 chan
->beacon_found
= false;
1803 if (wiphy
->regulatory_flags
& REGULATORY_WIPHY_SELF_MANAGED
)
1804 chan
->flags
= chan
->orig_flags
| bw_flags
|
1805 map_regdom_flags(reg_rule
->flags
);
1807 chan
->flags
|= map_regdom_flags(reg_rule
->flags
) | bw_flags
;
1809 chan
->max_antenna_gain
= (int) MBI_TO_DBI(power_rule
->max_antenna_gain
);
1810 chan
->max_reg_power
= chan
->max_power
=
1811 (int) MBM_TO_DBM(power_rule
->max_eirp
);
1813 if (chan
->flags
& IEEE80211_CHAN_RADAR
) {
1814 if (reg_rule
->dfs_cac_ms
)
1815 chan
->dfs_cac_ms
= reg_rule
->dfs_cac_ms
;
1817 chan
->dfs_cac_ms
= IEEE80211_DFS_MIN_CAC_TIME_MS
;
1820 chan
->max_power
= chan
->max_reg_power
;
1823 static void handle_band_custom(struct wiphy
*wiphy
,
1824 struct ieee80211_supported_band
*sband
,
1825 const struct ieee80211_regdomain
*regd
)
1832 for (i
= 0; i
< sband
->n_channels
; i
++)
1833 handle_channel_custom(wiphy
, &sband
->channels
[i
], regd
);
1836 /* Used by drivers prior to wiphy registration */
1837 void wiphy_apply_custom_regulatory(struct wiphy
*wiphy
,
1838 const struct ieee80211_regdomain
*regd
)
1840 enum ieee80211_band band
;
1841 unsigned int bands_set
= 0;
1843 WARN(!(wiphy
->regulatory_flags
& REGULATORY_CUSTOM_REG
),
1844 "wiphy should have REGULATORY_CUSTOM_REG\n");
1845 wiphy
->regulatory_flags
|= REGULATORY_CUSTOM_REG
;
1847 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++) {
1848 if (!wiphy
->bands
[band
])
1850 handle_band_custom(wiphy
, wiphy
->bands
[band
], regd
);
1855 * no point in calling this if it won't have any effect
1856 * on your device's supported bands.
1858 WARN_ON(!bands_set
);
1860 EXPORT_SYMBOL(wiphy_apply_custom_regulatory
);
1862 static void reg_set_request_processed(void)
1864 bool need_more_processing
= false;
1865 struct regulatory_request
*lr
= get_last_request();
1867 lr
->processed
= true;
1869 spin_lock(®_requests_lock
);
1870 if (!list_empty(®_requests_list
))
1871 need_more_processing
= true;
1872 spin_unlock(®_requests_lock
);
1874 cancel_crda_timeout();
1876 if (need_more_processing
)
1877 schedule_work(®_work
);
1881 * reg_process_hint_core - process core regulatory requests
1882 * @pending_request: a pending core regulatory request
1884 * The wireless subsystem can use this function to process
1885 * a regulatory request issued by the regulatory core.
1887 static enum reg_request_treatment
1888 reg_process_hint_core(struct regulatory_request
*core_request
)
1890 if (reg_query_database(core_request
)) {
1891 core_request
->intersect
= false;
1892 core_request
->processed
= false;
1893 reg_update_last_request(core_request
);
1897 return REG_REQ_IGNORE
;
1900 static enum reg_request_treatment
1901 __reg_process_hint_user(struct regulatory_request
*user_request
)
1903 struct regulatory_request
*lr
= get_last_request();
1905 if (reg_request_cell_base(user_request
))
1906 return reg_ignore_cell_hint(user_request
);
1908 if (reg_request_cell_base(lr
))
1909 return REG_REQ_IGNORE
;
1911 if (lr
->initiator
== NL80211_REGDOM_SET_BY_COUNTRY_IE
)
1912 return REG_REQ_INTERSECT
;
1914 * If the user knows better the user should set the regdom
1915 * to their country before the IE is picked up
1917 if (lr
->initiator
== NL80211_REGDOM_SET_BY_USER
&&
1919 return REG_REQ_IGNORE
;
1921 * Process user requests only after previous user/driver/core
1922 * requests have been processed
1924 if ((lr
->initiator
== NL80211_REGDOM_SET_BY_CORE
||
1925 lr
->initiator
== NL80211_REGDOM_SET_BY_DRIVER
||
1926 lr
->initiator
== NL80211_REGDOM_SET_BY_USER
) &&
1927 regdom_changes(lr
->alpha2
))
1928 return REG_REQ_IGNORE
;
1930 if (!regdom_changes(user_request
->alpha2
))
1931 return REG_REQ_ALREADY_SET
;
1937 * reg_process_hint_user - process user regulatory requests
1938 * @user_request: a pending user regulatory request
1940 * The wireless subsystem can use this function to process
1941 * a regulatory request initiated by userspace.
1943 static enum reg_request_treatment
1944 reg_process_hint_user(struct regulatory_request
*user_request
)
1946 enum reg_request_treatment treatment
;
1948 treatment
= __reg_process_hint_user(user_request
);
1949 if (treatment
== REG_REQ_IGNORE
||
1950 treatment
== REG_REQ_ALREADY_SET
)
1951 return REG_REQ_IGNORE
;
1953 user_request
->intersect
= treatment
== REG_REQ_INTERSECT
;
1954 user_request
->processed
= false;
1956 if (reg_query_database(user_request
)) {
1957 reg_update_last_request(user_request
);
1958 user_alpha2
[0] = user_request
->alpha2
[0];
1959 user_alpha2
[1] = user_request
->alpha2
[1];
1963 return REG_REQ_IGNORE
;
1966 static enum reg_request_treatment
1967 __reg_process_hint_driver(struct regulatory_request
*driver_request
)
1969 struct regulatory_request
*lr
= get_last_request();
1971 if (lr
->initiator
== NL80211_REGDOM_SET_BY_CORE
) {
1972 if (regdom_changes(driver_request
->alpha2
))
1974 return REG_REQ_ALREADY_SET
;
1978 * This would happen if you unplug and plug your card
1979 * back in or if you add a new device for which the previously
1980 * loaded card also agrees on the regulatory domain.
1982 if (lr
->initiator
== NL80211_REGDOM_SET_BY_DRIVER
&&
1983 !regdom_changes(driver_request
->alpha2
))
1984 return REG_REQ_ALREADY_SET
;
1986 return REG_REQ_INTERSECT
;
1990 * reg_process_hint_driver - process driver regulatory requests
1991 * @driver_request: a pending driver regulatory request
1993 * The wireless subsystem can use this function to process
1994 * a regulatory request issued by an 802.11 driver.
1996 * Returns one of the different reg request treatment values.
1998 static enum reg_request_treatment
1999 reg_process_hint_driver(struct wiphy
*wiphy
,
2000 struct regulatory_request
*driver_request
)
2002 const struct ieee80211_regdomain
*regd
, *tmp
;
2003 enum reg_request_treatment treatment
;
2005 treatment
= __reg_process_hint_driver(driver_request
);
2007 switch (treatment
) {
2010 case REG_REQ_IGNORE
:
2011 return REG_REQ_IGNORE
;
2012 case REG_REQ_INTERSECT
:
2013 case REG_REQ_ALREADY_SET
:
2014 regd
= reg_copy_regd(get_cfg80211_regdom());
2016 return REG_REQ_IGNORE
;
2018 tmp
= get_wiphy_regdom(wiphy
);
2019 rcu_assign_pointer(wiphy
->regd
, regd
);
2020 rcu_free_regdom(tmp
);
2024 driver_request
->intersect
= treatment
== REG_REQ_INTERSECT
;
2025 driver_request
->processed
= false;
2028 * Since CRDA will not be called in this case as we already
2029 * have applied the requested regulatory domain before we just
2030 * inform userspace we have processed the request
2032 if (treatment
== REG_REQ_ALREADY_SET
) {
2033 nl80211_send_reg_change_event(driver_request
);
2034 reg_update_last_request(driver_request
);
2035 reg_set_request_processed();
2036 return REG_REQ_ALREADY_SET
;
2039 if (reg_query_database(driver_request
)) {
2040 reg_update_last_request(driver_request
);
2044 return REG_REQ_IGNORE
;
2047 static enum reg_request_treatment
2048 __reg_process_hint_country_ie(struct wiphy
*wiphy
,
2049 struct regulatory_request
*country_ie_request
)
2051 struct wiphy
*last_wiphy
= NULL
;
2052 struct regulatory_request
*lr
= get_last_request();
2054 if (reg_request_cell_base(lr
)) {
2055 /* Trust a Cell base station over the AP's country IE */
2056 if (regdom_changes(country_ie_request
->alpha2
))
2057 return REG_REQ_IGNORE
;
2058 return REG_REQ_ALREADY_SET
;
2060 if (wiphy
->regulatory_flags
& REGULATORY_COUNTRY_IE_IGNORE
)
2061 return REG_REQ_IGNORE
;
2064 if (unlikely(!is_an_alpha2(country_ie_request
->alpha2
)))
2067 if (lr
->initiator
!= NL80211_REGDOM_SET_BY_COUNTRY_IE
)
2070 last_wiphy
= wiphy_idx_to_wiphy(lr
->wiphy_idx
);
2072 if (last_wiphy
!= wiphy
) {
2074 * Two cards with two APs claiming different
2075 * Country IE alpha2s. We could
2076 * intersect them, but that seems unlikely
2077 * to be correct. Reject second one for now.
2079 if (regdom_changes(country_ie_request
->alpha2
))
2080 return REG_REQ_IGNORE
;
2081 return REG_REQ_ALREADY_SET
;
2084 if (regdom_changes(country_ie_request
->alpha2
))
2086 return REG_REQ_ALREADY_SET
;
2090 * reg_process_hint_country_ie - process regulatory requests from country IEs
2091 * @country_ie_request: a regulatory request from a country IE
2093 * The wireless subsystem can use this function to process
2094 * a regulatory request issued by a country Information Element.
2096 * Returns one of the different reg request treatment values.
2098 static enum reg_request_treatment
2099 reg_process_hint_country_ie(struct wiphy
*wiphy
,
2100 struct regulatory_request
*country_ie_request
)
2102 enum reg_request_treatment treatment
;
2104 treatment
= __reg_process_hint_country_ie(wiphy
, country_ie_request
);
2106 switch (treatment
) {
2109 case REG_REQ_IGNORE
:
2110 return REG_REQ_IGNORE
;
2111 case REG_REQ_ALREADY_SET
:
2112 reg_free_request(country_ie_request
);
2113 return REG_REQ_ALREADY_SET
;
2114 case REG_REQ_INTERSECT
:
2116 * This doesn't happen yet, not sure we
2117 * ever want to support it for this case.
2119 WARN_ONCE(1, "Unexpected intersection for country IEs");
2120 return REG_REQ_IGNORE
;
2123 country_ie_request
->intersect
= false;
2124 country_ie_request
->processed
= false;
2126 if (reg_query_database(country_ie_request
)) {
2127 reg_update_last_request(country_ie_request
);
2131 return REG_REQ_IGNORE
;
2134 /* This processes *all* regulatory hints */
2135 static void reg_process_hint(struct regulatory_request
*reg_request
)
2137 struct wiphy
*wiphy
= NULL
;
2138 enum reg_request_treatment treatment
;
2140 if (reg_request
->wiphy_idx
!= WIPHY_IDX_INVALID
)
2141 wiphy
= wiphy_idx_to_wiphy(reg_request
->wiphy_idx
);
2143 switch (reg_request
->initiator
) {
2144 case NL80211_REGDOM_SET_BY_CORE
:
2145 treatment
= reg_process_hint_core(reg_request
);
2147 case NL80211_REGDOM_SET_BY_USER
:
2148 treatment
= reg_process_hint_user(reg_request
);
2150 case NL80211_REGDOM_SET_BY_DRIVER
:
2153 treatment
= reg_process_hint_driver(wiphy
, reg_request
);
2155 case NL80211_REGDOM_SET_BY_COUNTRY_IE
:
2158 treatment
= reg_process_hint_country_ie(wiphy
, reg_request
);
2161 WARN(1, "invalid initiator %d\n", reg_request
->initiator
);
2165 if (treatment
== REG_REQ_IGNORE
)
2168 WARN(treatment
!= REG_REQ_OK
&& treatment
!= REG_REQ_ALREADY_SET
,
2169 "unexpected treatment value %d\n", treatment
);
2171 /* This is required so that the orig_* parameters are saved.
2172 * NOTE: treatment must be set for any case that reaches here!
2174 if (treatment
== REG_REQ_ALREADY_SET
&& wiphy
&&
2175 wiphy
->regulatory_flags
& REGULATORY_STRICT_REG
) {
2176 wiphy_update_regulatory(wiphy
, reg_request
->initiator
);
2177 reg_check_channels();
2183 reg_free_request(reg_request
);
2186 static bool reg_only_self_managed_wiphys(void)
2188 struct cfg80211_registered_device
*rdev
;
2189 struct wiphy
*wiphy
;
2190 bool self_managed_found
= false;
2194 list_for_each_entry(rdev
, &cfg80211_rdev_list
, list
) {
2195 wiphy
= &rdev
->wiphy
;
2196 if (wiphy
->regulatory_flags
& REGULATORY_WIPHY_SELF_MANAGED
)
2197 self_managed_found
= true;
2202 /* make sure at least one self-managed wiphy exists */
2203 return self_managed_found
;
2207 * Processes regulatory hints, this is all the NL80211_REGDOM_SET_BY_*
2208 * Regulatory hints come on a first come first serve basis and we
2209 * must process each one atomically.
2211 static void reg_process_pending_hints(void)
2213 struct regulatory_request
*reg_request
, *lr
;
2215 lr
= get_last_request();
2217 /* When last_request->processed becomes true this will be rescheduled */
2218 if (lr
&& !lr
->processed
) {
2219 reg_process_hint(lr
);
2223 spin_lock(®_requests_lock
);
2225 if (list_empty(®_requests_list
)) {
2226 spin_unlock(®_requests_lock
);
2230 reg_request
= list_first_entry(®_requests_list
,
2231 struct regulatory_request
,
2233 list_del_init(®_request
->list
);
2235 spin_unlock(®_requests_lock
);
2237 if (reg_only_self_managed_wiphys()) {
2238 reg_free_request(reg_request
);
2242 reg_process_hint(reg_request
);
2244 lr
= get_last_request();
2246 spin_lock(®_requests_lock
);
2247 if (!list_empty(®_requests_list
) && lr
&& lr
->processed
)
2248 schedule_work(®_work
);
2249 spin_unlock(®_requests_lock
);
2252 /* Processes beacon hints -- this has nothing to do with country IEs */
2253 static void reg_process_pending_beacon_hints(void)
2255 struct cfg80211_registered_device
*rdev
;
2256 struct reg_beacon
*pending_beacon
, *tmp
;
2258 /* This goes through the _pending_ beacon list */
2259 spin_lock_bh(®_pending_beacons_lock
);
2261 list_for_each_entry_safe(pending_beacon
, tmp
,
2262 ®_pending_beacons
, list
) {
2263 list_del_init(&pending_beacon
->list
);
2265 /* Applies the beacon hint to current wiphys */
2266 list_for_each_entry(rdev
, &cfg80211_rdev_list
, list
)
2267 wiphy_update_new_beacon(&rdev
->wiphy
, pending_beacon
);
2269 /* Remembers the beacon hint for new wiphys or reg changes */
2270 list_add_tail(&pending_beacon
->list
, ®_beacon_list
);
2273 spin_unlock_bh(®_pending_beacons_lock
);
2276 static void reg_process_self_managed_hints(void)
2278 struct cfg80211_registered_device
*rdev
;
2279 struct wiphy
*wiphy
;
2280 const struct ieee80211_regdomain
*tmp
;
2281 const struct ieee80211_regdomain
*regd
;
2282 enum ieee80211_band band
;
2283 struct regulatory_request request
= {};
2285 list_for_each_entry(rdev
, &cfg80211_rdev_list
, list
) {
2286 wiphy
= &rdev
->wiphy
;
2288 spin_lock(®_requests_lock
);
2289 regd
= rdev
->requested_regd
;
2290 rdev
->requested_regd
= NULL
;
2291 spin_unlock(®_requests_lock
);
2296 tmp
= get_wiphy_regdom(wiphy
);
2297 rcu_assign_pointer(wiphy
->regd
, regd
);
2298 rcu_free_regdom(tmp
);
2300 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++)
2301 handle_band_custom(wiphy
, wiphy
->bands
[band
], regd
);
2303 reg_process_ht_flags(wiphy
);
2305 request
.wiphy_idx
= get_wiphy_idx(wiphy
);
2306 request
.alpha2
[0] = regd
->alpha2
[0];
2307 request
.alpha2
[1] = regd
->alpha2
[1];
2308 request
.initiator
= NL80211_REGDOM_SET_BY_DRIVER
;
2310 nl80211_send_wiphy_reg_change_event(&request
);
2313 reg_check_channels();
2316 static void reg_todo(struct work_struct
*work
)
2319 reg_process_pending_hints();
2320 reg_process_pending_beacon_hints();
2321 reg_process_self_managed_hints();
2325 static void queue_regulatory_request(struct regulatory_request
*request
)
2327 request
->alpha2
[0] = toupper(request
->alpha2
[0]);
2328 request
->alpha2
[1] = toupper(request
->alpha2
[1]);
2330 spin_lock(®_requests_lock
);
2331 list_add_tail(&request
->list
, ®_requests_list
);
2332 spin_unlock(®_requests_lock
);
2334 schedule_work(®_work
);
2338 * Core regulatory hint -- happens during cfg80211_init()
2339 * and when we restore regulatory settings.
2341 static int regulatory_hint_core(const char *alpha2
)
2343 struct regulatory_request
*request
;
2345 request
= kzalloc(sizeof(struct regulatory_request
), GFP_KERNEL
);
2349 request
->alpha2
[0] = alpha2
[0];
2350 request
->alpha2
[1] = alpha2
[1];
2351 request
->initiator
= NL80211_REGDOM_SET_BY_CORE
;
2353 queue_regulatory_request(request
);
2359 int regulatory_hint_user(const char *alpha2
,
2360 enum nl80211_user_reg_hint_type user_reg_hint_type
)
2362 struct regulatory_request
*request
;
2364 if (WARN_ON(!alpha2
))
2367 request
= kzalloc(sizeof(struct regulatory_request
), GFP_KERNEL
);
2371 request
->wiphy_idx
= WIPHY_IDX_INVALID
;
2372 request
->alpha2
[0] = alpha2
[0];
2373 request
->alpha2
[1] = alpha2
[1];
2374 request
->initiator
= NL80211_REGDOM_SET_BY_USER
;
2375 request
->user_reg_hint_type
= user_reg_hint_type
;
2377 /* Allow calling CRDA again */
2378 reset_crda_timeouts();
2380 queue_regulatory_request(request
);
2385 int regulatory_hint_indoor(bool is_indoor
, u32 portid
)
2387 spin_lock(®_indoor_lock
);
2389 /* It is possible that more than one user space process is trying to
2390 * configure the indoor setting. To handle such cases, clear the indoor
2391 * setting in case that some process does not think that the device
2392 * is operating in an indoor environment. In addition, if a user space
2393 * process indicates that it is controlling the indoor setting, save its
2394 * portid, i.e., make it the owner.
2396 reg_is_indoor
= is_indoor
;
2397 if (reg_is_indoor
) {
2398 if (!reg_is_indoor_portid
)
2399 reg_is_indoor_portid
= portid
;
2401 reg_is_indoor_portid
= 0;
2404 spin_unlock(®_indoor_lock
);
2407 reg_check_channels();
2412 void regulatory_netlink_notify(u32 portid
)
2414 spin_lock(®_indoor_lock
);
2416 if (reg_is_indoor_portid
!= portid
) {
2417 spin_unlock(®_indoor_lock
);
2421 reg_is_indoor
= false;
2422 reg_is_indoor_portid
= 0;
2424 spin_unlock(®_indoor_lock
);
2426 reg_check_channels();
2430 int regulatory_hint(struct wiphy
*wiphy
, const char *alpha2
)
2432 struct regulatory_request
*request
;
2434 if (WARN_ON(!alpha2
|| !wiphy
))
2437 wiphy
->regulatory_flags
&= ~REGULATORY_CUSTOM_REG
;
2439 request
= kzalloc(sizeof(struct regulatory_request
), GFP_KERNEL
);
2443 request
->wiphy_idx
= get_wiphy_idx(wiphy
);
2445 request
->alpha2
[0] = alpha2
[0];
2446 request
->alpha2
[1] = alpha2
[1];
2447 request
->initiator
= NL80211_REGDOM_SET_BY_DRIVER
;
2449 /* Allow calling CRDA again */
2450 reset_crda_timeouts();
2452 queue_regulatory_request(request
);
2456 EXPORT_SYMBOL(regulatory_hint
);
2458 void regulatory_hint_country_ie(struct wiphy
*wiphy
, enum ieee80211_band band
,
2459 const u8
*country_ie
, u8 country_ie_len
)
2462 enum environment_cap env
= ENVIRON_ANY
;
2463 struct regulatory_request
*request
= NULL
, *lr
;
2465 /* IE len must be evenly divisible by 2 */
2466 if (country_ie_len
& 0x01)
2469 if (country_ie_len
< IEEE80211_COUNTRY_IE_MIN_LEN
)
2472 request
= kzalloc(sizeof(*request
), GFP_KERNEL
);
2476 alpha2
[0] = country_ie
[0];
2477 alpha2
[1] = country_ie
[1];
2479 if (country_ie
[2] == 'I')
2480 env
= ENVIRON_INDOOR
;
2481 else if (country_ie
[2] == 'O')
2482 env
= ENVIRON_OUTDOOR
;
2485 lr
= get_last_request();
2491 * We will run this only upon a successful connection on cfg80211.
2492 * We leave conflict resolution to the workqueue, where can hold
2495 if (lr
->initiator
== NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
2496 lr
->wiphy_idx
!= WIPHY_IDX_INVALID
)
2499 request
->wiphy_idx
= get_wiphy_idx(wiphy
);
2500 request
->alpha2
[0] = alpha2
[0];
2501 request
->alpha2
[1] = alpha2
[1];
2502 request
->initiator
= NL80211_REGDOM_SET_BY_COUNTRY_IE
;
2503 request
->country_ie_env
= env
;
2505 /* Allow calling CRDA again */
2506 reset_crda_timeouts();
2508 queue_regulatory_request(request
);
2515 static void restore_alpha2(char *alpha2
, bool reset_user
)
2517 /* indicates there is no alpha2 to consider for restoration */
2521 /* The user setting has precedence over the module parameter */
2522 if (is_user_regdom_saved()) {
2523 /* Unless we're asked to ignore it and reset it */
2525 REG_DBG_PRINT("Restoring regulatory settings including user preference\n");
2526 user_alpha2
[0] = '9';
2527 user_alpha2
[1] = '7';
2530 * If we're ignoring user settings, we still need to
2531 * check the module parameter to ensure we put things
2532 * back as they were for a full restore.
2534 if (!is_world_regdom(ieee80211_regdom
)) {
2535 REG_DBG_PRINT("Keeping preference on module parameter ieee80211_regdom: %c%c\n",
2536 ieee80211_regdom
[0], ieee80211_regdom
[1]);
2537 alpha2
[0] = ieee80211_regdom
[0];
2538 alpha2
[1] = ieee80211_regdom
[1];
2541 REG_DBG_PRINT("Restoring regulatory settings while preserving user preference for: %c%c\n",
2542 user_alpha2
[0], user_alpha2
[1]);
2543 alpha2
[0] = user_alpha2
[0];
2544 alpha2
[1] = user_alpha2
[1];
2546 } else if (!is_world_regdom(ieee80211_regdom
)) {
2547 REG_DBG_PRINT("Keeping preference on module parameter ieee80211_regdom: %c%c\n",
2548 ieee80211_regdom
[0], ieee80211_regdom
[1]);
2549 alpha2
[0] = ieee80211_regdom
[0];
2550 alpha2
[1] = ieee80211_regdom
[1];
2552 REG_DBG_PRINT("Restoring regulatory settings\n");
2555 static void restore_custom_reg_settings(struct wiphy
*wiphy
)
2557 struct ieee80211_supported_band
*sband
;
2558 enum ieee80211_band band
;
2559 struct ieee80211_channel
*chan
;
2562 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++) {
2563 sband
= wiphy
->bands
[band
];
2566 for (i
= 0; i
< sband
->n_channels
; i
++) {
2567 chan
= &sband
->channels
[i
];
2568 chan
->flags
= chan
->orig_flags
;
2569 chan
->max_antenna_gain
= chan
->orig_mag
;
2570 chan
->max_power
= chan
->orig_mpwr
;
2571 chan
->beacon_found
= false;
2577 * Restoring regulatory settings involves ingoring any
2578 * possibly stale country IE information and user regulatory
2579 * settings if so desired, this includes any beacon hints
2580 * learned as we could have traveled outside to another country
2581 * after disconnection. To restore regulatory settings we do
2582 * exactly what we did at bootup:
2584 * - send a core regulatory hint
2585 * - send a user regulatory hint if applicable
2587 * Device drivers that send a regulatory hint for a specific country
2588 * keep their own regulatory domain on wiphy->regd so that does does
2589 * not need to be remembered.
2591 static void restore_regulatory_settings(bool reset_user
)
2594 char world_alpha2
[2];
2595 struct reg_beacon
*reg_beacon
, *btmp
;
2596 LIST_HEAD(tmp_reg_req_list
);
2597 struct cfg80211_registered_device
*rdev
;
2602 * Clear the indoor setting in case that it is not controlled by user
2603 * space, as otherwise there is no guarantee that the device is still
2604 * operating in an indoor environment.
2606 spin_lock(®_indoor_lock
);
2607 if (reg_is_indoor
&& !reg_is_indoor_portid
) {
2608 reg_is_indoor
= false;
2609 reg_check_channels();
2611 spin_unlock(®_indoor_lock
);
2613 reset_regdomains(true, &world_regdom
);
2614 restore_alpha2(alpha2
, reset_user
);
2617 * If there's any pending requests we simply
2618 * stash them to a temporary pending queue and
2619 * add then after we've restored regulatory
2622 spin_lock(®_requests_lock
);
2623 list_splice_tail_init(®_requests_list
, &tmp_reg_req_list
);
2624 spin_unlock(®_requests_lock
);
2626 /* Clear beacon hints */
2627 spin_lock_bh(®_pending_beacons_lock
);
2628 list_for_each_entry_safe(reg_beacon
, btmp
, ®_pending_beacons
, list
) {
2629 list_del(®_beacon
->list
);
2632 spin_unlock_bh(®_pending_beacons_lock
);
2634 list_for_each_entry_safe(reg_beacon
, btmp
, ®_beacon_list
, list
) {
2635 list_del(®_beacon
->list
);
2639 /* First restore to the basic regulatory settings */
2640 world_alpha2
[0] = cfg80211_world_regdom
->alpha2
[0];
2641 world_alpha2
[1] = cfg80211_world_regdom
->alpha2
[1];
2643 list_for_each_entry(rdev
, &cfg80211_rdev_list
, list
) {
2644 if (rdev
->wiphy
.regulatory_flags
& REGULATORY_WIPHY_SELF_MANAGED
)
2646 if (rdev
->wiphy
.regulatory_flags
& REGULATORY_CUSTOM_REG
)
2647 restore_custom_reg_settings(&rdev
->wiphy
);
2650 regulatory_hint_core(world_alpha2
);
2653 * This restores the ieee80211_regdom module parameter
2654 * preference or the last user requested regulatory
2655 * settings, user regulatory settings takes precedence.
2657 if (is_an_alpha2(alpha2
))
2658 regulatory_hint_user(alpha2
, NL80211_USER_REG_HINT_USER
);
2660 spin_lock(®_requests_lock
);
2661 list_splice_tail_init(&tmp_reg_req_list
, ®_requests_list
);
2662 spin_unlock(®_requests_lock
);
2664 REG_DBG_PRINT("Kicking the queue\n");
2666 schedule_work(®_work
);
2669 void regulatory_hint_disconnect(void)
2671 REG_DBG_PRINT("All devices are disconnected, going to restore regulatory settings\n");
2672 restore_regulatory_settings(false);
2675 static bool freq_is_chan_12_13_14(u16 freq
)
2677 if (freq
== ieee80211_channel_to_frequency(12, IEEE80211_BAND_2GHZ
) ||
2678 freq
== ieee80211_channel_to_frequency(13, IEEE80211_BAND_2GHZ
) ||
2679 freq
== ieee80211_channel_to_frequency(14, IEEE80211_BAND_2GHZ
))
2684 static bool pending_reg_beacon(struct ieee80211_channel
*beacon_chan
)
2686 struct reg_beacon
*pending_beacon
;
2688 list_for_each_entry(pending_beacon
, ®_pending_beacons
, list
)
2689 if (beacon_chan
->center_freq
==
2690 pending_beacon
->chan
.center_freq
)
2695 int regulatory_hint_found_beacon(struct wiphy
*wiphy
,
2696 struct ieee80211_channel
*beacon_chan
,
2699 struct reg_beacon
*reg_beacon
;
2702 if (beacon_chan
->beacon_found
||
2703 beacon_chan
->flags
& IEEE80211_CHAN_RADAR
||
2704 (beacon_chan
->band
== IEEE80211_BAND_2GHZ
&&
2705 !freq_is_chan_12_13_14(beacon_chan
->center_freq
)))
2708 spin_lock_bh(®_pending_beacons_lock
);
2709 processing
= pending_reg_beacon(beacon_chan
);
2710 spin_unlock_bh(®_pending_beacons_lock
);
2715 reg_beacon
= kzalloc(sizeof(struct reg_beacon
), gfp
);
2719 REG_DBG_PRINT("Found new beacon on frequency: %d MHz (Ch %d) on %s\n",
2720 beacon_chan
->center_freq
,
2721 ieee80211_frequency_to_channel(beacon_chan
->center_freq
),
2724 memcpy(®_beacon
->chan
, beacon_chan
,
2725 sizeof(struct ieee80211_channel
));
2728 * Since we can be called from BH or and non-BH context
2729 * we must use spin_lock_bh()
2731 spin_lock_bh(®_pending_beacons_lock
);
2732 list_add_tail(®_beacon
->list
, ®_pending_beacons
);
2733 spin_unlock_bh(®_pending_beacons_lock
);
2735 schedule_work(®_work
);
2740 static void print_rd_rules(const struct ieee80211_regdomain
*rd
)
2743 const struct ieee80211_reg_rule
*reg_rule
= NULL
;
2744 const struct ieee80211_freq_range
*freq_range
= NULL
;
2745 const struct ieee80211_power_rule
*power_rule
= NULL
;
2746 char bw
[32], cac_time
[32];
2748 pr_info(" (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp), (dfs_cac_time)\n");
2750 for (i
= 0; i
< rd
->n_reg_rules
; i
++) {
2751 reg_rule
= &rd
->reg_rules
[i
];
2752 freq_range
= ®_rule
->freq_range
;
2753 power_rule
= ®_rule
->power_rule
;
2755 if (reg_rule
->flags
& NL80211_RRF_AUTO_BW
)
2756 snprintf(bw
, sizeof(bw
), "%d KHz, %d KHz AUTO",
2757 freq_range
->max_bandwidth_khz
,
2758 reg_get_max_bandwidth(rd
, reg_rule
));
2760 snprintf(bw
, sizeof(bw
), "%d KHz",
2761 freq_range
->max_bandwidth_khz
);
2763 if (reg_rule
->flags
& NL80211_RRF_DFS
)
2764 scnprintf(cac_time
, sizeof(cac_time
), "%u s",
2765 reg_rule
->dfs_cac_ms
/1000);
2767 scnprintf(cac_time
, sizeof(cac_time
), "N/A");
2771 * There may not be documentation for max antenna gain
2772 * in certain regions
2774 if (power_rule
->max_antenna_gain
)
2775 pr_info(" (%d KHz - %d KHz @ %s), (%d mBi, %d mBm), (%s)\n",
2776 freq_range
->start_freq_khz
,
2777 freq_range
->end_freq_khz
,
2779 power_rule
->max_antenna_gain
,
2780 power_rule
->max_eirp
,
2783 pr_info(" (%d KHz - %d KHz @ %s), (N/A, %d mBm), (%s)\n",
2784 freq_range
->start_freq_khz
,
2785 freq_range
->end_freq_khz
,
2787 power_rule
->max_eirp
,
2792 bool reg_supported_dfs_region(enum nl80211_dfs_regions dfs_region
)
2794 switch (dfs_region
) {
2795 case NL80211_DFS_UNSET
:
2796 case NL80211_DFS_FCC
:
2797 case NL80211_DFS_ETSI
:
2798 case NL80211_DFS_JP
:
2801 REG_DBG_PRINT("Ignoring uknown DFS master region: %d\n",
2807 static void print_regdomain(const struct ieee80211_regdomain
*rd
)
2809 struct regulatory_request
*lr
= get_last_request();
2811 if (is_intersected_alpha2(rd
->alpha2
)) {
2812 if (lr
->initiator
== NL80211_REGDOM_SET_BY_COUNTRY_IE
) {
2813 struct cfg80211_registered_device
*rdev
;
2814 rdev
= cfg80211_rdev_by_wiphy_idx(lr
->wiphy_idx
);
2816 pr_info("Current regulatory domain updated by AP to: %c%c\n",
2817 rdev
->country_ie_alpha2
[0],
2818 rdev
->country_ie_alpha2
[1]);
2820 pr_info("Current regulatory domain intersected:\n");
2822 pr_info("Current regulatory domain intersected:\n");
2823 } else if (is_world_regdom(rd
->alpha2
)) {
2824 pr_info("World regulatory domain updated:\n");
2826 if (is_unknown_alpha2(rd
->alpha2
))
2827 pr_info("Regulatory domain changed to driver built-in settings (unknown country)\n");
2829 if (reg_request_cell_base(lr
))
2830 pr_info("Regulatory domain changed to country: %c%c by Cell Station\n",
2831 rd
->alpha2
[0], rd
->alpha2
[1]);
2833 pr_info("Regulatory domain changed to country: %c%c\n",
2834 rd
->alpha2
[0], rd
->alpha2
[1]);
2838 pr_info(" DFS Master region: %s", reg_dfs_region_str(rd
->dfs_region
));
2842 static void print_regdomain_info(const struct ieee80211_regdomain
*rd
)
2844 pr_info("Regulatory domain: %c%c\n", rd
->alpha2
[0], rd
->alpha2
[1]);
2848 static int reg_set_rd_core(const struct ieee80211_regdomain
*rd
)
2850 if (!is_world_regdom(rd
->alpha2
))
2852 update_world_regdomain(rd
);
2856 static int reg_set_rd_user(const struct ieee80211_regdomain
*rd
,
2857 struct regulatory_request
*user_request
)
2859 const struct ieee80211_regdomain
*intersected_rd
= NULL
;
2861 if (!regdom_changes(rd
->alpha2
))
2864 if (!is_valid_rd(rd
)) {
2865 pr_err("Invalid regulatory domain detected:\n");
2866 print_regdomain_info(rd
);
2870 if (!user_request
->intersect
) {
2871 reset_regdomains(false, rd
);
2875 intersected_rd
= regdom_intersect(rd
, get_cfg80211_regdom());
2876 if (!intersected_rd
)
2881 reset_regdomains(false, intersected_rd
);
2886 static int reg_set_rd_driver(const struct ieee80211_regdomain
*rd
,
2887 struct regulatory_request
*driver_request
)
2889 const struct ieee80211_regdomain
*regd
;
2890 const struct ieee80211_regdomain
*intersected_rd
= NULL
;
2891 const struct ieee80211_regdomain
*tmp
;
2892 struct wiphy
*request_wiphy
;
2894 if (is_world_regdom(rd
->alpha2
))
2897 if (!regdom_changes(rd
->alpha2
))
2900 if (!is_valid_rd(rd
)) {
2901 pr_err("Invalid regulatory domain detected:\n");
2902 print_regdomain_info(rd
);
2906 request_wiphy
= wiphy_idx_to_wiphy(driver_request
->wiphy_idx
);
2910 if (!driver_request
->intersect
) {
2911 if (request_wiphy
->regd
)
2914 regd
= reg_copy_regd(rd
);
2916 return PTR_ERR(regd
);
2918 rcu_assign_pointer(request_wiphy
->regd
, regd
);
2919 reset_regdomains(false, rd
);
2923 intersected_rd
= regdom_intersect(rd
, get_cfg80211_regdom());
2924 if (!intersected_rd
)
2928 * We can trash what CRDA provided now.
2929 * However if a driver requested this specific regulatory
2930 * domain we keep it for its private use
2932 tmp
= get_wiphy_regdom(request_wiphy
);
2933 rcu_assign_pointer(request_wiphy
->regd
, rd
);
2934 rcu_free_regdom(tmp
);
2938 reset_regdomains(false, intersected_rd
);
2943 static int reg_set_rd_country_ie(const struct ieee80211_regdomain
*rd
,
2944 struct regulatory_request
*country_ie_request
)
2946 struct wiphy
*request_wiphy
;
2948 if (!is_alpha2_set(rd
->alpha2
) && !is_an_alpha2(rd
->alpha2
) &&
2949 !is_unknown_alpha2(rd
->alpha2
))
2953 * Lets only bother proceeding on the same alpha2 if the current
2954 * rd is non static (it means CRDA was present and was used last)
2955 * and the pending request came in from a country IE
2958 if (!is_valid_rd(rd
)) {
2959 pr_err("Invalid regulatory domain detected:\n");
2960 print_regdomain_info(rd
);
2964 request_wiphy
= wiphy_idx_to_wiphy(country_ie_request
->wiphy_idx
);
2968 if (country_ie_request
->intersect
)
2971 reset_regdomains(false, rd
);
2976 * Use this call to set the current regulatory domain. Conflicts with
2977 * multiple drivers can be ironed out later. Caller must've already
2978 * kmalloc'd the rd structure.
2980 int set_regdom(const struct ieee80211_regdomain
*rd
,
2981 enum ieee80211_regd_source regd_src
)
2983 struct regulatory_request
*lr
;
2984 bool user_reset
= false;
2987 if (!reg_is_valid_request(rd
->alpha2
)) {
2992 if (regd_src
== REGD_SOURCE_CRDA
)
2993 reset_crda_timeouts();
2995 lr
= get_last_request();
2997 /* Note that this doesn't update the wiphys, this is done below */
2998 switch (lr
->initiator
) {
2999 case NL80211_REGDOM_SET_BY_CORE
:
3000 r
= reg_set_rd_core(rd
);
3002 case NL80211_REGDOM_SET_BY_USER
:
3003 r
= reg_set_rd_user(rd
, lr
);
3006 case NL80211_REGDOM_SET_BY_DRIVER
:
3007 r
= reg_set_rd_driver(rd
, lr
);
3009 case NL80211_REGDOM_SET_BY_COUNTRY_IE
:
3010 r
= reg_set_rd_country_ie(rd
, lr
);
3013 WARN(1, "invalid initiator %d\n", lr
->initiator
);
3021 reg_set_request_processed();
3024 /* Back to world regulatory in case of errors */
3025 restore_regulatory_settings(user_reset
);
3032 /* This would make this whole thing pointless */
3033 if (WARN_ON(!lr
->intersect
&& rd
!= get_cfg80211_regdom()))
3036 /* update all wiphys now with the new established regulatory domain */
3037 update_all_wiphy_regulatory(lr
->initiator
);
3039 print_regdomain(get_cfg80211_regdom());
3041 nl80211_send_reg_change_event(lr
);
3043 reg_set_request_processed();
3048 static int __regulatory_set_wiphy_regd(struct wiphy
*wiphy
,
3049 struct ieee80211_regdomain
*rd
)
3051 const struct ieee80211_regdomain
*regd
;
3052 const struct ieee80211_regdomain
*prev_regd
;
3053 struct cfg80211_registered_device
*rdev
;
3055 if (WARN_ON(!wiphy
|| !rd
))
3058 if (WARN(!(wiphy
->regulatory_flags
& REGULATORY_WIPHY_SELF_MANAGED
),
3059 "wiphy should have REGULATORY_WIPHY_SELF_MANAGED\n"))
3062 if (WARN(!is_valid_rd(rd
), "Invalid regulatory domain detected\n")) {
3063 print_regdomain_info(rd
);
3067 regd
= reg_copy_regd(rd
);
3069 return PTR_ERR(regd
);
3071 rdev
= wiphy_to_rdev(wiphy
);
3073 spin_lock(®_requests_lock
);
3074 prev_regd
= rdev
->requested_regd
;
3075 rdev
->requested_regd
= regd
;
3076 spin_unlock(®_requests_lock
);
3082 int regulatory_set_wiphy_regd(struct wiphy
*wiphy
,
3083 struct ieee80211_regdomain
*rd
)
3085 int ret
= __regulatory_set_wiphy_regd(wiphy
, rd
);
3090 schedule_work(®_work
);
3093 EXPORT_SYMBOL(regulatory_set_wiphy_regd
);
3095 int regulatory_set_wiphy_regd_sync_rtnl(struct wiphy
*wiphy
,
3096 struct ieee80211_regdomain
*rd
)
3102 ret
= __regulatory_set_wiphy_regd(wiphy
, rd
);
3106 /* process the request immediately */
3107 reg_process_self_managed_hints();
3110 EXPORT_SYMBOL(regulatory_set_wiphy_regd_sync_rtnl
);
3112 void wiphy_regulatory_register(struct wiphy
*wiphy
)
3114 struct regulatory_request
*lr
;
3116 /* self-managed devices ignore external hints */
3117 if (wiphy
->regulatory_flags
& REGULATORY_WIPHY_SELF_MANAGED
)
3118 wiphy
->regulatory_flags
|= REGULATORY_DISABLE_BEACON_HINTS
|
3119 REGULATORY_COUNTRY_IE_IGNORE
;
3121 if (!reg_dev_ignore_cell_hint(wiphy
))
3122 reg_num_devs_support_basehint
++;
3124 lr
= get_last_request();
3125 wiphy_update_regulatory(wiphy
, lr
->initiator
);
3128 void wiphy_regulatory_deregister(struct wiphy
*wiphy
)
3130 struct wiphy
*request_wiphy
= NULL
;
3131 struct regulatory_request
*lr
;
3133 lr
= get_last_request();
3135 if (!reg_dev_ignore_cell_hint(wiphy
))
3136 reg_num_devs_support_basehint
--;
3138 rcu_free_regdom(get_wiphy_regdom(wiphy
));
3139 RCU_INIT_POINTER(wiphy
->regd
, NULL
);
3142 request_wiphy
= wiphy_idx_to_wiphy(lr
->wiphy_idx
);
3144 if (!request_wiphy
|| request_wiphy
!= wiphy
)
3147 lr
->wiphy_idx
= WIPHY_IDX_INVALID
;
3148 lr
->country_ie_env
= ENVIRON_ANY
;
3152 * See http://www.fcc.gov/document/5-ghz-unlicensed-spectrum-unii, for
3153 * UNII band definitions
3155 int cfg80211_get_unii(int freq
)
3158 if (freq
>= 5150 && freq
<= 5250)
3162 if (freq
> 5250 && freq
<= 5350)
3166 if (freq
> 5350 && freq
<= 5470)
3170 if (freq
> 5470 && freq
<= 5725)
3174 if (freq
> 5725 && freq
<= 5825)
3180 bool regulatory_indoor_allowed(void)
3182 return reg_is_indoor
;
3185 int __init
regulatory_init(void)
3189 reg_pdev
= platform_device_register_simple("regulatory", 0, NULL
, 0);
3190 if (IS_ERR(reg_pdev
))
3191 return PTR_ERR(reg_pdev
);
3193 spin_lock_init(®_requests_lock
);
3194 spin_lock_init(®_pending_beacons_lock
);
3195 spin_lock_init(®_indoor_lock
);
3197 reg_regdb_size_check();
3199 rcu_assign_pointer(cfg80211_regdomain
, cfg80211_world_regdom
);
3201 user_alpha2
[0] = '9';
3202 user_alpha2
[1] = '7';
3204 /* We always try to get an update for the static regdomain */
3205 err
= regulatory_hint_core(cfg80211_world_regdom
->alpha2
);
3207 if (err
== -ENOMEM
) {
3208 platform_device_unregister(reg_pdev
);
3212 * N.B. kobject_uevent_env() can fail mainly for when we're out
3213 * memory which is handled and propagated appropriately above
3214 * but it can also fail during a netlink_broadcast() or during
3215 * early boot for call_usermodehelper(). For now treat these
3216 * errors as non-fatal.
3218 pr_err("kobject_uevent_env() was unable to call CRDA during init\n");
3222 * Finally, if the user set the module parameter treat it
3225 if (!is_world_regdom(ieee80211_regdom
))
3226 regulatory_hint_user(ieee80211_regdom
,
3227 NL80211_USER_REG_HINT_USER
);
3232 void regulatory_exit(void)
3234 struct regulatory_request
*reg_request
, *tmp
;
3235 struct reg_beacon
*reg_beacon
, *btmp
;
3237 cancel_work_sync(®_work
);
3238 cancel_crda_timeout_sync();
3239 cancel_delayed_work_sync(®_check_chans
);
3241 /* Lock to suppress warnings */
3243 reset_regdomains(true, NULL
);
3246 dev_set_uevent_suppress(®_pdev
->dev
, true);
3248 platform_device_unregister(reg_pdev
);
3250 list_for_each_entry_safe(reg_beacon
, btmp
, ®_pending_beacons
, list
) {
3251 list_del(®_beacon
->list
);
3255 list_for_each_entry_safe(reg_beacon
, btmp
, ®_beacon_list
, list
) {
3256 list_del(®_beacon
->list
);
3260 list_for_each_entry_safe(reg_request
, tmp
, ®_requests_list
, list
) {
3261 list_del(®_request
->list
);