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(struct wiphy
*wiphy
, 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(wiphy
, 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
);
1170 * Note that right now we assume the desired channel bandwidth
1171 * is always 20 MHz for each individual channel (HT40 uses 20 MHz
1172 * per channel, the primary and the extension channel).
1174 static void handle_channel(struct wiphy
*wiphy
,
1175 enum nl80211_reg_initiator initiator
,
1176 struct ieee80211_channel
*chan
)
1178 u32 flags
, bw_flags
= 0;
1179 const struct ieee80211_reg_rule
*reg_rule
= NULL
;
1180 const struct ieee80211_power_rule
*power_rule
= NULL
;
1181 const struct ieee80211_freq_range
*freq_range
= NULL
;
1182 struct wiphy
*request_wiphy
= NULL
;
1183 struct regulatory_request
*lr
= get_last_request();
1184 const struct ieee80211_regdomain
*regd
;
1185 u32 max_bandwidth_khz
;
1187 request_wiphy
= wiphy_idx_to_wiphy(lr
->wiphy_idx
);
1189 flags
= chan
->orig_flags
;
1191 reg_rule
= freq_reg_info(wiphy
, MHZ_TO_KHZ(chan
->center_freq
));
1192 if (IS_ERR(reg_rule
)) {
1194 * We will disable all channels that do not match our
1195 * received regulatory rule unless the hint is coming
1196 * from a Country IE and the Country IE had no information
1197 * about a band. The IEEE 802.11 spec allows for an AP
1198 * to send only a subset of the regulatory rules allowed,
1199 * so an AP in the US that only supports 2.4 GHz may only send
1200 * a country IE with information for the 2.4 GHz band
1201 * while 5 GHz is still supported.
1203 if (initiator
== NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
1204 PTR_ERR(reg_rule
) == -ERANGE
)
1207 if (lr
->initiator
== NL80211_REGDOM_SET_BY_DRIVER
&&
1208 request_wiphy
&& request_wiphy
== wiphy
&&
1209 request_wiphy
->regulatory_flags
& REGULATORY_STRICT_REG
) {
1210 REG_DBG_PRINT("Disabling freq %d MHz for good\n",
1212 chan
->orig_flags
|= IEEE80211_CHAN_DISABLED
;
1213 chan
->flags
= chan
->orig_flags
;
1215 REG_DBG_PRINT("Disabling freq %d MHz\n",
1217 chan
->flags
|= IEEE80211_CHAN_DISABLED
;
1222 regd
= reg_get_regdomain(wiphy
);
1223 chan_reg_rule_print_dbg(regd
, chan
, reg_rule
);
1225 power_rule
= ®_rule
->power_rule
;
1226 freq_range
= ®_rule
->freq_range
;
1228 max_bandwidth_khz
= freq_range
->max_bandwidth_khz
;
1229 /* Check if auto calculation requested */
1230 if (reg_rule
->flags
& NL80211_RRF_AUTO_BW
)
1231 max_bandwidth_khz
= reg_get_max_bandwidth(regd
, reg_rule
);
1233 /* If we get a reg_rule we can assume that at least 5Mhz fit */
1234 if (!reg_does_bw_fit(freq_range
, MHZ_TO_KHZ(chan
->center_freq
),
1236 bw_flags
|= IEEE80211_CHAN_NO_10MHZ
;
1237 if (!reg_does_bw_fit(freq_range
, MHZ_TO_KHZ(chan
->center_freq
),
1239 bw_flags
|= IEEE80211_CHAN_NO_20MHZ
;
1241 if (max_bandwidth_khz
< MHZ_TO_KHZ(10))
1242 bw_flags
|= IEEE80211_CHAN_NO_10MHZ
;
1243 if (max_bandwidth_khz
< MHZ_TO_KHZ(20))
1244 bw_flags
|= IEEE80211_CHAN_NO_20MHZ
;
1245 if (max_bandwidth_khz
< MHZ_TO_KHZ(40))
1246 bw_flags
|= IEEE80211_CHAN_NO_HT40
;
1247 if (max_bandwidth_khz
< MHZ_TO_KHZ(80))
1248 bw_flags
|= IEEE80211_CHAN_NO_80MHZ
;
1249 if (max_bandwidth_khz
< MHZ_TO_KHZ(160))
1250 bw_flags
|= IEEE80211_CHAN_NO_160MHZ
;
1252 if (lr
->initiator
== NL80211_REGDOM_SET_BY_DRIVER
&&
1253 request_wiphy
&& request_wiphy
== wiphy
&&
1254 request_wiphy
->regulatory_flags
& REGULATORY_STRICT_REG
) {
1256 * This guarantees the driver's requested regulatory domain
1257 * will always be used as a base for further regulatory
1260 chan
->flags
= chan
->orig_flags
=
1261 map_regdom_flags(reg_rule
->flags
) | bw_flags
;
1262 chan
->max_antenna_gain
= chan
->orig_mag
=
1263 (int) MBI_TO_DBI(power_rule
->max_antenna_gain
);
1264 chan
->max_reg_power
= chan
->max_power
= chan
->orig_mpwr
=
1265 (int) MBM_TO_DBM(power_rule
->max_eirp
);
1267 if (chan
->flags
& IEEE80211_CHAN_RADAR
) {
1268 chan
->dfs_cac_ms
= IEEE80211_DFS_MIN_CAC_TIME_MS
;
1269 if (reg_rule
->dfs_cac_ms
)
1270 chan
->dfs_cac_ms
= reg_rule
->dfs_cac_ms
;
1276 chan
->dfs_state
= NL80211_DFS_USABLE
;
1277 chan
->dfs_state_entered
= jiffies
;
1279 chan
->beacon_found
= false;
1280 chan
->flags
= flags
| bw_flags
| map_regdom_flags(reg_rule
->flags
);
1281 chan
->max_antenna_gain
=
1282 min_t(int, chan
->orig_mag
,
1283 MBI_TO_DBI(power_rule
->max_antenna_gain
));
1284 chan
->max_reg_power
= (int) MBM_TO_DBM(power_rule
->max_eirp
);
1286 if (chan
->flags
& IEEE80211_CHAN_RADAR
) {
1287 if (reg_rule
->dfs_cac_ms
)
1288 chan
->dfs_cac_ms
= reg_rule
->dfs_cac_ms
;
1290 chan
->dfs_cac_ms
= IEEE80211_DFS_MIN_CAC_TIME_MS
;
1293 if (chan
->orig_mpwr
) {
1295 * Devices that use REGULATORY_COUNTRY_IE_FOLLOW_POWER
1296 * will always follow the passed country IE power settings.
1298 if (initiator
== NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
1299 wiphy
->regulatory_flags
& REGULATORY_COUNTRY_IE_FOLLOW_POWER
)
1300 chan
->max_power
= chan
->max_reg_power
;
1302 chan
->max_power
= min(chan
->orig_mpwr
,
1303 chan
->max_reg_power
);
1305 chan
->max_power
= chan
->max_reg_power
;
1308 static void handle_band(struct wiphy
*wiphy
,
1309 enum nl80211_reg_initiator initiator
,
1310 struct ieee80211_supported_band
*sband
)
1317 for (i
= 0; i
< sband
->n_channels
; i
++)
1318 handle_channel(wiphy
, initiator
, &sband
->channels
[i
]);
1321 static bool reg_request_cell_base(struct regulatory_request
*request
)
1323 if (request
->initiator
!= NL80211_REGDOM_SET_BY_USER
)
1325 return request
->user_reg_hint_type
== NL80211_USER_REG_HINT_CELL_BASE
;
1328 bool reg_last_request_cell_base(void)
1330 return reg_request_cell_base(get_last_request());
1333 #ifdef CONFIG_CFG80211_REG_CELLULAR_HINTS
1334 /* Core specific check */
1335 static enum reg_request_treatment
1336 reg_ignore_cell_hint(struct regulatory_request
*pending_request
)
1338 struct regulatory_request
*lr
= get_last_request();
1340 if (!reg_num_devs_support_basehint
)
1341 return REG_REQ_IGNORE
;
1343 if (reg_request_cell_base(lr
) &&
1344 !regdom_changes(pending_request
->alpha2
))
1345 return REG_REQ_ALREADY_SET
;
1350 /* Device specific check */
1351 static bool reg_dev_ignore_cell_hint(struct wiphy
*wiphy
)
1353 return !(wiphy
->features
& NL80211_FEATURE_CELL_BASE_REG_HINTS
);
1356 static enum reg_request_treatment
1357 reg_ignore_cell_hint(struct regulatory_request
*pending_request
)
1359 return REG_REQ_IGNORE
;
1362 static bool reg_dev_ignore_cell_hint(struct wiphy
*wiphy
)
1368 static bool wiphy_strict_alpha2_regd(struct wiphy
*wiphy
)
1370 if (wiphy
->regulatory_flags
& REGULATORY_STRICT_REG
&&
1371 !(wiphy
->regulatory_flags
& REGULATORY_CUSTOM_REG
))
1376 static bool ignore_reg_update(struct wiphy
*wiphy
,
1377 enum nl80211_reg_initiator initiator
)
1379 struct regulatory_request
*lr
= get_last_request();
1381 if (wiphy
->regulatory_flags
& REGULATORY_WIPHY_SELF_MANAGED
)
1385 REG_DBG_PRINT("Ignoring regulatory request set by %s "
1386 "since last_request is not set\n",
1387 reg_initiator_name(initiator
));
1391 if (initiator
== NL80211_REGDOM_SET_BY_CORE
&&
1392 wiphy
->regulatory_flags
& REGULATORY_CUSTOM_REG
) {
1393 REG_DBG_PRINT("Ignoring regulatory request set by %s "
1394 "since the driver uses its own custom "
1395 "regulatory domain\n",
1396 reg_initiator_name(initiator
));
1401 * wiphy->regd will be set once the device has its own
1402 * desired regulatory domain set
1404 if (wiphy_strict_alpha2_regd(wiphy
) && !wiphy
->regd
&&
1405 initiator
!= NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
1406 !is_world_regdom(lr
->alpha2
)) {
1407 REG_DBG_PRINT("Ignoring regulatory request set by %s "
1408 "since the driver requires its own regulatory "
1409 "domain to be set first\n",
1410 reg_initiator_name(initiator
));
1414 if (reg_request_cell_base(lr
))
1415 return reg_dev_ignore_cell_hint(wiphy
);
1420 static bool reg_is_world_roaming(struct wiphy
*wiphy
)
1422 const struct ieee80211_regdomain
*cr
= get_cfg80211_regdom();
1423 const struct ieee80211_regdomain
*wr
= get_wiphy_regdom(wiphy
);
1424 struct regulatory_request
*lr
= get_last_request();
1426 if (is_world_regdom(cr
->alpha2
) || (wr
&& is_world_regdom(wr
->alpha2
)))
1429 if (lr
&& lr
->initiator
!= NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
1430 wiphy
->regulatory_flags
& REGULATORY_CUSTOM_REG
)
1436 static void handle_reg_beacon(struct wiphy
*wiphy
, unsigned int chan_idx
,
1437 struct reg_beacon
*reg_beacon
)
1439 struct ieee80211_supported_band
*sband
;
1440 struct ieee80211_channel
*chan
;
1441 bool channel_changed
= false;
1442 struct ieee80211_channel chan_before
;
1444 sband
= wiphy
->bands
[reg_beacon
->chan
.band
];
1445 chan
= &sband
->channels
[chan_idx
];
1447 if (likely(chan
->center_freq
!= reg_beacon
->chan
.center_freq
))
1450 if (chan
->beacon_found
)
1453 chan
->beacon_found
= true;
1455 if (!reg_is_world_roaming(wiphy
))
1458 if (wiphy
->regulatory_flags
& REGULATORY_DISABLE_BEACON_HINTS
)
1461 chan_before
.center_freq
= chan
->center_freq
;
1462 chan_before
.flags
= chan
->flags
;
1464 if (chan
->flags
& IEEE80211_CHAN_NO_IR
) {
1465 chan
->flags
&= ~IEEE80211_CHAN_NO_IR
;
1466 channel_changed
= true;
1469 if (channel_changed
)
1470 nl80211_send_beacon_hint_event(wiphy
, &chan_before
, chan
);
1474 * Called when a scan on a wiphy finds a beacon on
1477 static void wiphy_update_new_beacon(struct wiphy
*wiphy
,
1478 struct reg_beacon
*reg_beacon
)
1481 struct ieee80211_supported_band
*sband
;
1483 if (!wiphy
->bands
[reg_beacon
->chan
.band
])
1486 sband
= wiphy
->bands
[reg_beacon
->chan
.band
];
1488 for (i
= 0; i
< sband
->n_channels
; i
++)
1489 handle_reg_beacon(wiphy
, i
, reg_beacon
);
1493 * Called upon reg changes or a new wiphy is added
1495 static void wiphy_update_beacon_reg(struct wiphy
*wiphy
)
1498 struct ieee80211_supported_band
*sband
;
1499 struct reg_beacon
*reg_beacon
;
1501 list_for_each_entry(reg_beacon
, ®_beacon_list
, list
) {
1502 if (!wiphy
->bands
[reg_beacon
->chan
.band
])
1504 sband
= wiphy
->bands
[reg_beacon
->chan
.band
];
1505 for (i
= 0; i
< sband
->n_channels
; i
++)
1506 handle_reg_beacon(wiphy
, i
, reg_beacon
);
1510 /* Reap the advantages of previously found beacons */
1511 static void reg_process_beacons(struct wiphy
*wiphy
)
1514 * Means we are just firing up cfg80211, so no beacons would
1515 * have been processed yet.
1519 wiphy_update_beacon_reg(wiphy
);
1522 static bool is_ht40_allowed(struct ieee80211_channel
*chan
)
1526 if (chan
->flags
& IEEE80211_CHAN_DISABLED
)
1528 /* This would happen when regulatory rules disallow HT40 completely */
1529 if ((chan
->flags
& IEEE80211_CHAN_NO_HT40
) == IEEE80211_CHAN_NO_HT40
)
1534 static void reg_process_ht_flags_channel(struct wiphy
*wiphy
,
1535 struct ieee80211_channel
*channel
)
1537 struct ieee80211_supported_band
*sband
= wiphy
->bands
[channel
->band
];
1538 struct ieee80211_channel
*channel_before
= NULL
, *channel_after
= NULL
;
1541 if (!is_ht40_allowed(channel
)) {
1542 channel
->flags
|= IEEE80211_CHAN_NO_HT40
;
1547 * We need to ensure the extension channels exist to
1548 * be able to use HT40- or HT40+, this finds them (or not)
1550 for (i
= 0; i
< sband
->n_channels
; i
++) {
1551 struct ieee80211_channel
*c
= &sband
->channels
[i
];
1553 if (c
->center_freq
== (channel
->center_freq
- 20))
1555 if (c
->center_freq
== (channel
->center_freq
+ 20))
1560 * Please note that this assumes target bandwidth is 20 MHz,
1561 * if that ever changes we also need to change the below logic
1562 * to include that as well.
1564 if (!is_ht40_allowed(channel_before
))
1565 channel
->flags
|= IEEE80211_CHAN_NO_HT40MINUS
;
1567 channel
->flags
&= ~IEEE80211_CHAN_NO_HT40MINUS
;
1569 if (!is_ht40_allowed(channel_after
))
1570 channel
->flags
|= IEEE80211_CHAN_NO_HT40PLUS
;
1572 channel
->flags
&= ~IEEE80211_CHAN_NO_HT40PLUS
;
1575 static void reg_process_ht_flags_band(struct wiphy
*wiphy
,
1576 struct ieee80211_supported_band
*sband
)
1583 for (i
= 0; i
< sband
->n_channels
; i
++)
1584 reg_process_ht_flags_channel(wiphy
, &sband
->channels
[i
]);
1587 static void reg_process_ht_flags(struct wiphy
*wiphy
)
1589 enum ieee80211_band band
;
1594 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++)
1595 reg_process_ht_flags_band(wiphy
, wiphy
->bands
[band
]);
1598 static void reg_call_notifier(struct wiphy
*wiphy
,
1599 struct regulatory_request
*request
)
1601 if (wiphy
->reg_notifier
)
1602 wiphy
->reg_notifier(wiphy
, request
);
1605 static bool reg_wdev_chan_valid(struct wiphy
*wiphy
, struct wireless_dev
*wdev
)
1607 struct cfg80211_chan_def chandef
;
1608 struct cfg80211_registered_device
*rdev
= wiphy_to_rdev(wiphy
);
1609 enum nl80211_iftype iftype
;
1612 iftype
= wdev
->iftype
;
1614 /* make sure the interface is active */
1615 if (!wdev
->netdev
|| !netif_running(wdev
->netdev
))
1616 goto wdev_inactive_unlock
;
1619 case NL80211_IFTYPE_AP
:
1620 case NL80211_IFTYPE_P2P_GO
:
1621 if (!wdev
->beacon_interval
)
1622 goto wdev_inactive_unlock
;
1623 chandef
= wdev
->chandef
;
1625 case NL80211_IFTYPE_ADHOC
:
1626 if (!wdev
->ssid_len
)
1627 goto wdev_inactive_unlock
;
1628 chandef
= wdev
->chandef
;
1630 case NL80211_IFTYPE_STATION
:
1631 case NL80211_IFTYPE_P2P_CLIENT
:
1632 if (!wdev
->current_bss
||
1633 !wdev
->current_bss
->pub
.channel
)
1634 goto wdev_inactive_unlock
;
1636 if (!rdev
->ops
->get_channel
||
1637 rdev_get_channel(rdev
, wdev
, &chandef
))
1638 cfg80211_chandef_create(&chandef
,
1639 wdev
->current_bss
->pub
.channel
,
1640 NL80211_CHAN_NO_HT
);
1642 case NL80211_IFTYPE_MONITOR
:
1643 case NL80211_IFTYPE_AP_VLAN
:
1644 case NL80211_IFTYPE_P2P_DEVICE
:
1645 /* no enforcement required */
1648 /* others not implemented for now */
1656 case NL80211_IFTYPE_AP
:
1657 case NL80211_IFTYPE_P2P_GO
:
1658 case NL80211_IFTYPE_ADHOC
:
1659 return cfg80211_reg_can_beacon_relax(wiphy
, &chandef
, iftype
);
1660 case NL80211_IFTYPE_STATION
:
1661 case NL80211_IFTYPE_P2P_CLIENT
:
1662 return cfg80211_chandef_usable(wiphy
, &chandef
,
1663 IEEE80211_CHAN_DISABLED
);
1670 wdev_inactive_unlock
:
1675 static void reg_leave_invalid_chans(struct wiphy
*wiphy
)
1677 struct wireless_dev
*wdev
;
1678 struct cfg80211_registered_device
*rdev
= wiphy_to_rdev(wiphy
);
1682 list_for_each_entry(wdev
, &rdev
->wdev_list
, list
)
1683 if (!reg_wdev_chan_valid(wiphy
, wdev
))
1684 cfg80211_leave(rdev
, wdev
);
1687 static void reg_check_chans_work(struct work_struct
*work
)
1689 struct cfg80211_registered_device
*rdev
;
1691 REG_DBG_PRINT("Verifying active interfaces after reg change\n");
1694 list_for_each_entry(rdev
, &cfg80211_rdev_list
, list
)
1695 if (!(rdev
->wiphy
.regulatory_flags
&
1696 REGULATORY_IGNORE_STALE_KICKOFF
))
1697 reg_leave_invalid_chans(&rdev
->wiphy
);
1702 static void reg_check_channels(void)
1705 * Give usermode a chance to do something nicer (move to another
1706 * channel, orderly disconnection), before forcing a disconnection.
1708 mod_delayed_work(system_power_efficient_wq
,
1710 msecs_to_jiffies(REG_ENFORCE_GRACE_MS
));
1713 static void wiphy_update_regulatory(struct wiphy
*wiphy
,
1714 enum nl80211_reg_initiator initiator
)
1716 enum ieee80211_band band
;
1717 struct regulatory_request
*lr
= get_last_request();
1719 if (ignore_reg_update(wiphy
, initiator
)) {
1721 * Regulatory updates set by CORE are ignored for custom
1722 * regulatory cards. Let us notify the changes to the driver,
1723 * as some drivers used this to restore its orig_* reg domain.
1725 if (initiator
== NL80211_REGDOM_SET_BY_CORE
&&
1726 wiphy
->regulatory_flags
& REGULATORY_CUSTOM_REG
)
1727 reg_call_notifier(wiphy
, lr
);
1731 lr
->dfs_region
= get_cfg80211_regdom()->dfs_region
;
1733 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++)
1734 handle_band(wiphy
, initiator
, wiphy
->bands
[band
]);
1736 reg_process_beacons(wiphy
);
1737 reg_process_ht_flags(wiphy
);
1738 reg_call_notifier(wiphy
, lr
);
1741 static void update_all_wiphy_regulatory(enum nl80211_reg_initiator initiator
)
1743 struct cfg80211_registered_device
*rdev
;
1744 struct wiphy
*wiphy
;
1748 list_for_each_entry(rdev
, &cfg80211_rdev_list
, list
) {
1749 wiphy
= &rdev
->wiphy
;
1750 wiphy_update_regulatory(wiphy
, initiator
);
1753 reg_check_channels();
1756 static void handle_channel_custom(struct wiphy
*wiphy
,
1757 struct ieee80211_channel
*chan
,
1758 const struct ieee80211_regdomain
*regd
)
1761 const struct ieee80211_reg_rule
*reg_rule
= NULL
;
1762 const struct ieee80211_power_rule
*power_rule
= NULL
;
1763 const struct ieee80211_freq_range
*freq_range
= NULL
;
1764 u32 max_bandwidth_khz
;
1767 for (bw
= MHZ_TO_KHZ(20); bw
>= MHZ_TO_KHZ(5); bw
= bw
/ 2) {
1768 reg_rule
= freq_reg_info_regd(wiphy
,
1769 MHZ_TO_KHZ(chan
->center_freq
),
1771 if (!IS_ERR(reg_rule
))
1775 if (IS_ERR(reg_rule
)) {
1776 REG_DBG_PRINT("Disabling freq %d MHz as custom regd has no rule that fits it\n",
1778 if (wiphy
->regulatory_flags
& REGULATORY_WIPHY_SELF_MANAGED
) {
1779 chan
->flags
|= IEEE80211_CHAN_DISABLED
;
1781 chan
->orig_flags
|= IEEE80211_CHAN_DISABLED
;
1782 chan
->flags
= chan
->orig_flags
;
1787 chan_reg_rule_print_dbg(regd
, chan
, reg_rule
);
1789 power_rule
= ®_rule
->power_rule
;
1790 freq_range
= ®_rule
->freq_range
;
1792 max_bandwidth_khz
= freq_range
->max_bandwidth_khz
;
1793 /* Check if auto calculation requested */
1794 if (reg_rule
->flags
& NL80211_RRF_AUTO_BW
)
1795 max_bandwidth_khz
= reg_get_max_bandwidth(regd
, reg_rule
);
1797 /* If we get a reg_rule we can assume that at least 5Mhz fit */
1798 if (!reg_does_bw_fit(freq_range
, MHZ_TO_KHZ(chan
->center_freq
),
1800 bw_flags
|= IEEE80211_CHAN_NO_10MHZ
;
1801 if (!reg_does_bw_fit(freq_range
, MHZ_TO_KHZ(chan
->center_freq
),
1803 bw_flags
|= IEEE80211_CHAN_NO_20MHZ
;
1805 if (max_bandwidth_khz
< MHZ_TO_KHZ(10))
1806 bw_flags
|= IEEE80211_CHAN_NO_10MHZ
;
1807 if (max_bandwidth_khz
< MHZ_TO_KHZ(20))
1808 bw_flags
|= IEEE80211_CHAN_NO_20MHZ
;
1809 if (max_bandwidth_khz
< MHZ_TO_KHZ(40))
1810 bw_flags
|= IEEE80211_CHAN_NO_HT40
;
1811 if (max_bandwidth_khz
< MHZ_TO_KHZ(80))
1812 bw_flags
|= IEEE80211_CHAN_NO_80MHZ
;
1813 if (max_bandwidth_khz
< MHZ_TO_KHZ(160))
1814 bw_flags
|= IEEE80211_CHAN_NO_160MHZ
;
1816 chan
->dfs_state_entered
= jiffies
;
1817 chan
->dfs_state
= NL80211_DFS_USABLE
;
1819 chan
->beacon_found
= false;
1821 if (wiphy
->regulatory_flags
& REGULATORY_WIPHY_SELF_MANAGED
)
1822 chan
->flags
= chan
->orig_flags
| bw_flags
|
1823 map_regdom_flags(reg_rule
->flags
);
1825 chan
->flags
|= map_regdom_flags(reg_rule
->flags
) | bw_flags
;
1827 chan
->max_antenna_gain
= (int) MBI_TO_DBI(power_rule
->max_antenna_gain
);
1828 chan
->max_reg_power
= chan
->max_power
=
1829 (int) MBM_TO_DBM(power_rule
->max_eirp
);
1831 if (chan
->flags
& IEEE80211_CHAN_RADAR
) {
1832 if (reg_rule
->dfs_cac_ms
)
1833 chan
->dfs_cac_ms
= reg_rule
->dfs_cac_ms
;
1835 chan
->dfs_cac_ms
= IEEE80211_DFS_MIN_CAC_TIME_MS
;
1838 chan
->max_power
= chan
->max_reg_power
;
1841 static void handle_band_custom(struct wiphy
*wiphy
,
1842 struct ieee80211_supported_band
*sband
,
1843 const struct ieee80211_regdomain
*regd
)
1850 for (i
= 0; i
< sband
->n_channels
; i
++)
1851 handle_channel_custom(wiphy
, &sband
->channels
[i
], regd
);
1854 /* Used by drivers prior to wiphy registration */
1855 void wiphy_apply_custom_regulatory(struct wiphy
*wiphy
,
1856 const struct ieee80211_regdomain
*regd
)
1858 enum ieee80211_band band
;
1859 unsigned int bands_set
= 0;
1861 WARN(!(wiphy
->regulatory_flags
& REGULATORY_CUSTOM_REG
),
1862 "wiphy should have REGULATORY_CUSTOM_REG\n");
1863 wiphy
->regulatory_flags
|= REGULATORY_CUSTOM_REG
;
1865 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++) {
1866 if (!wiphy
->bands
[band
])
1868 handle_band_custom(wiphy
, wiphy
->bands
[band
], regd
);
1873 * no point in calling this if it won't have any effect
1874 * on your device's supported bands.
1876 WARN_ON(!bands_set
);
1878 EXPORT_SYMBOL(wiphy_apply_custom_regulatory
);
1880 static void reg_set_request_processed(void)
1882 bool need_more_processing
= false;
1883 struct regulatory_request
*lr
= get_last_request();
1885 #ifdef CONFIG_CFG80211_REG_NOT_UPDATED
1887 * SAMSUNG FIX : Regulatory Configuration was update
1888 * via WIPHY_FLAG_CUSTOM_REGULATORY of Wi-Fi Driver.
1889 * Regulation should not updated even if device found other country Access Point Beacon once
1890 * since device should find around other Access Points.
1891 * 2014.1.8 Convergence Wi-Fi Core
1893 printk("regulatory is not upadted via %s.\n", __func__
);
1897 lr
->processed
= true;
1899 spin_lock(®_requests_lock
);
1900 if (!list_empty(®_requests_list
))
1901 need_more_processing
= true;
1902 spin_unlock(®_requests_lock
);
1904 cancel_crda_timeout();
1906 if (need_more_processing
)
1907 schedule_work(®_work
);
1911 * reg_process_hint_core - process core regulatory requests
1912 * @pending_request: a pending core regulatory request
1914 * The wireless subsystem can use this function to process
1915 * a regulatory request issued by the regulatory core.
1917 static enum reg_request_treatment
1918 reg_process_hint_core(struct regulatory_request
*core_request
)
1920 if (reg_query_database(core_request
)) {
1921 core_request
->intersect
= false;
1922 core_request
->processed
= false;
1923 reg_update_last_request(core_request
);
1927 return REG_REQ_IGNORE
;
1930 static enum reg_request_treatment
1931 __reg_process_hint_user(struct regulatory_request
*user_request
)
1933 struct regulatory_request
*lr
= get_last_request();
1935 if (reg_request_cell_base(user_request
))
1936 return reg_ignore_cell_hint(user_request
);
1938 if (reg_request_cell_base(lr
))
1939 return REG_REQ_IGNORE
;
1941 if (lr
->initiator
== NL80211_REGDOM_SET_BY_COUNTRY_IE
)
1942 return REG_REQ_INTERSECT
;
1944 * If the user knows better the user should set the regdom
1945 * to their country before the IE is picked up
1947 if (lr
->initiator
== NL80211_REGDOM_SET_BY_USER
&&
1949 return REG_REQ_IGNORE
;
1951 * Process user requests only after previous user/driver/core
1952 * requests have been processed
1954 if ((lr
->initiator
== NL80211_REGDOM_SET_BY_CORE
||
1955 lr
->initiator
== NL80211_REGDOM_SET_BY_DRIVER
||
1956 lr
->initiator
== NL80211_REGDOM_SET_BY_USER
) &&
1957 regdom_changes(lr
->alpha2
))
1958 return REG_REQ_IGNORE
;
1960 if (!regdom_changes(user_request
->alpha2
))
1961 return REG_REQ_ALREADY_SET
;
1967 * reg_process_hint_user - process user regulatory requests
1968 * @user_request: a pending user regulatory request
1970 * The wireless subsystem can use this function to process
1971 * a regulatory request initiated by userspace.
1973 static enum reg_request_treatment
1974 reg_process_hint_user(struct regulatory_request
*user_request
)
1976 enum reg_request_treatment treatment
;
1978 treatment
= __reg_process_hint_user(user_request
);
1979 if (treatment
== REG_REQ_IGNORE
||
1980 treatment
== REG_REQ_ALREADY_SET
)
1981 return REG_REQ_IGNORE
;
1983 user_request
->intersect
= treatment
== REG_REQ_INTERSECT
;
1984 user_request
->processed
= false;
1986 if (reg_query_database(user_request
)) {
1987 reg_update_last_request(user_request
);
1988 user_alpha2
[0] = user_request
->alpha2
[0];
1989 user_alpha2
[1] = user_request
->alpha2
[1];
1993 return REG_REQ_IGNORE
;
1996 static enum reg_request_treatment
1997 __reg_process_hint_driver(struct regulatory_request
*driver_request
)
1999 struct regulatory_request
*lr
= get_last_request();
2001 if (lr
->initiator
== NL80211_REGDOM_SET_BY_CORE
) {
2002 if (regdom_changes(driver_request
->alpha2
))
2004 return REG_REQ_ALREADY_SET
;
2008 * This would happen if you unplug and plug your card
2009 * back in or if you add a new device for which the previously
2010 * loaded card also agrees on the regulatory domain.
2012 if (lr
->initiator
== NL80211_REGDOM_SET_BY_DRIVER
&&
2013 !regdom_changes(driver_request
->alpha2
))
2014 return REG_REQ_ALREADY_SET
;
2016 return REG_REQ_INTERSECT
;
2020 * reg_process_hint_driver - process driver regulatory requests
2021 * @driver_request: a pending driver regulatory request
2023 * The wireless subsystem can use this function to process
2024 * a regulatory request issued by an 802.11 driver.
2026 * Returns one of the different reg request treatment values.
2028 static enum reg_request_treatment
2029 reg_process_hint_driver(struct wiphy
*wiphy
,
2030 struct regulatory_request
*driver_request
)
2032 const struct ieee80211_regdomain
*regd
, *tmp
;
2033 enum reg_request_treatment treatment
;
2035 treatment
= __reg_process_hint_driver(driver_request
);
2037 switch (treatment
) {
2040 case REG_REQ_IGNORE
:
2041 return REG_REQ_IGNORE
;
2042 case REG_REQ_INTERSECT
:
2043 case REG_REQ_ALREADY_SET
:
2044 regd
= reg_copy_regd(get_cfg80211_regdom());
2046 return REG_REQ_IGNORE
;
2048 tmp
= get_wiphy_regdom(wiphy
);
2049 rcu_assign_pointer(wiphy
->regd
, regd
);
2050 rcu_free_regdom(tmp
);
2054 driver_request
->intersect
= treatment
== REG_REQ_INTERSECT
;
2055 driver_request
->processed
= false;
2058 * Since CRDA will not be called in this case as we already
2059 * have applied the requested regulatory domain before we just
2060 * inform userspace we have processed the request
2062 if (treatment
== REG_REQ_ALREADY_SET
) {
2063 nl80211_send_reg_change_event(driver_request
);
2064 reg_update_last_request(driver_request
);
2065 reg_set_request_processed();
2066 return REG_REQ_ALREADY_SET
;
2069 if (reg_query_database(driver_request
)) {
2070 reg_update_last_request(driver_request
);
2074 return REG_REQ_IGNORE
;
2077 static enum reg_request_treatment
2078 __reg_process_hint_country_ie(struct wiphy
*wiphy
,
2079 struct regulatory_request
*country_ie_request
)
2081 struct wiphy
*last_wiphy
= NULL
;
2082 struct regulatory_request
*lr
= get_last_request();
2084 if (reg_request_cell_base(lr
)) {
2085 /* Trust a Cell base station over the AP's country IE */
2086 if (regdom_changes(country_ie_request
->alpha2
))
2087 return REG_REQ_IGNORE
;
2088 return REG_REQ_ALREADY_SET
;
2090 if (wiphy
->regulatory_flags
& REGULATORY_COUNTRY_IE_IGNORE
)
2091 return REG_REQ_IGNORE
;
2094 if (unlikely(!is_an_alpha2(country_ie_request
->alpha2
)))
2097 if (lr
->initiator
!= NL80211_REGDOM_SET_BY_COUNTRY_IE
)
2100 last_wiphy
= wiphy_idx_to_wiphy(lr
->wiphy_idx
);
2102 if (last_wiphy
!= wiphy
) {
2104 * Two cards with two APs claiming different
2105 * Country IE alpha2s. We could
2106 * intersect them, but that seems unlikely
2107 * to be correct. Reject second one for now.
2109 if (regdom_changes(country_ie_request
->alpha2
))
2110 return REG_REQ_IGNORE
;
2111 return REG_REQ_ALREADY_SET
;
2114 if (regdom_changes(country_ie_request
->alpha2
))
2116 return REG_REQ_ALREADY_SET
;
2120 * reg_process_hint_country_ie - process regulatory requests from country IEs
2121 * @country_ie_request: a regulatory request from a country IE
2123 * The wireless subsystem can use this function to process
2124 * a regulatory request issued by a country Information Element.
2126 * Returns one of the different reg request treatment values.
2128 static enum reg_request_treatment
2129 reg_process_hint_country_ie(struct wiphy
*wiphy
,
2130 struct regulatory_request
*country_ie_request
)
2132 enum reg_request_treatment treatment
;
2134 treatment
= __reg_process_hint_country_ie(wiphy
, country_ie_request
);
2136 switch (treatment
) {
2139 case REG_REQ_IGNORE
:
2140 return REG_REQ_IGNORE
;
2141 case REG_REQ_ALREADY_SET
:
2142 reg_free_request(country_ie_request
);
2143 return REG_REQ_ALREADY_SET
;
2144 case REG_REQ_INTERSECT
:
2146 * This doesn't happen yet, not sure we
2147 * ever want to support it for this case.
2149 WARN_ONCE(1, "Unexpected intersection for country IEs");
2150 return REG_REQ_IGNORE
;
2153 country_ie_request
->intersect
= false;
2154 country_ie_request
->processed
= false;
2156 if (reg_query_database(country_ie_request
)) {
2157 reg_update_last_request(country_ie_request
);
2161 return REG_REQ_IGNORE
;
2164 /* This processes *all* regulatory hints */
2165 static void reg_process_hint(struct regulatory_request
*reg_request
)
2167 struct wiphy
*wiphy
= NULL
;
2168 enum reg_request_treatment treatment
;
2170 if (reg_request
->wiphy_idx
!= WIPHY_IDX_INVALID
)
2171 wiphy
= wiphy_idx_to_wiphy(reg_request
->wiphy_idx
);
2173 switch (reg_request
->initiator
) {
2174 case NL80211_REGDOM_SET_BY_CORE
:
2175 treatment
= reg_process_hint_core(reg_request
);
2177 case NL80211_REGDOM_SET_BY_USER
:
2178 treatment
= reg_process_hint_user(reg_request
);
2180 case NL80211_REGDOM_SET_BY_DRIVER
:
2183 treatment
= reg_process_hint_driver(wiphy
, reg_request
);
2185 case NL80211_REGDOM_SET_BY_COUNTRY_IE
:
2188 treatment
= reg_process_hint_country_ie(wiphy
, reg_request
);
2191 WARN(1, "invalid initiator %d\n", reg_request
->initiator
);
2195 if (treatment
== REG_REQ_IGNORE
)
2198 WARN(treatment
!= REG_REQ_OK
&& treatment
!= REG_REQ_ALREADY_SET
,
2199 "unexpected treatment value %d\n", treatment
);
2201 /* This is required so that the orig_* parameters are saved.
2202 * NOTE: treatment must be set for any case that reaches here!
2204 if (treatment
== REG_REQ_ALREADY_SET
&& wiphy
&&
2205 wiphy
->regulatory_flags
& REGULATORY_STRICT_REG
) {
2206 wiphy_update_regulatory(wiphy
, reg_request
->initiator
);
2207 reg_check_channels();
2213 reg_free_request(reg_request
);
2216 static bool reg_only_self_managed_wiphys(void)
2218 struct cfg80211_registered_device
*rdev
;
2219 struct wiphy
*wiphy
;
2220 bool self_managed_found
= false;
2224 list_for_each_entry(rdev
, &cfg80211_rdev_list
, list
) {
2225 wiphy
= &rdev
->wiphy
;
2226 if (wiphy
->regulatory_flags
& REGULATORY_WIPHY_SELF_MANAGED
)
2227 self_managed_found
= true;
2232 /* make sure at least one self-managed wiphy exists */
2233 return self_managed_found
;
2237 * Processes regulatory hints, this is all the NL80211_REGDOM_SET_BY_*
2238 * Regulatory hints come on a first come first serve basis and we
2239 * must process each one atomically.
2241 static void reg_process_pending_hints(void)
2243 struct regulatory_request
*reg_request
, *lr
;
2245 lr
= get_last_request();
2247 /* When last_request->processed becomes true this will be rescheduled */
2248 if (lr
&& !lr
->processed
) {
2249 reg_process_hint(lr
);
2253 spin_lock(®_requests_lock
);
2255 if (list_empty(®_requests_list
)) {
2256 spin_unlock(®_requests_lock
);
2260 reg_request
= list_first_entry(®_requests_list
,
2261 struct regulatory_request
,
2263 list_del_init(®_request
->list
);
2265 spin_unlock(®_requests_lock
);
2267 if (reg_only_self_managed_wiphys()) {
2268 reg_free_request(reg_request
);
2272 reg_process_hint(reg_request
);
2274 lr
= get_last_request();
2276 spin_lock(®_requests_lock
);
2277 if (!list_empty(®_requests_list
) && lr
&& lr
->processed
)
2278 schedule_work(®_work
);
2279 spin_unlock(®_requests_lock
);
2282 /* Processes beacon hints -- this has nothing to do with country IEs */
2283 static void reg_process_pending_beacon_hints(void)
2285 struct cfg80211_registered_device
*rdev
;
2286 struct reg_beacon
*pending_beacon
, *tmp
;
2288 /* This goes through the _pending_ beacon list */
2289 spin_lock_bh(®_pending_beacons_lock
);
2291 list_for_each_entry_safe(pending_beacon
, tmp
,
2292 ®_pending_beacons
, list
) {
2293 list_del_init(&pending_beacon
->list
);
2295 /* Applies the beacon hint to current wiphys */
2296 list_for_each_entry(rdev
, &cfg80211_rdev_list
, list
)
2297 wiphy_update_new_beacon(&rdev
->wiphy
, pending_beacon
);
2299 /* Remembers the beacon hint for new wiphys or reg changes */
2300 list_add_tail(&pending_beacon
->list
, ®_beacon_list
);
2303 spin_unlock_bh(®_pending_beacons_lock
);
2306 static void reg_process_self_managed_hints(void)
2308 struct cfg80211_registered_device
*rdev
;
2309 struct wiphy
*wiphy
;
2310 const struct ieee80211_regdomain
*tmp
;
2311 const struct ieee80211_regdomain
*regd
;
2312 enum ieee80211_band band
;
2313 struct regulatory_request request
= {};
2315 list_for_each_entry(rdev
, &cfg80211_rdev_list
, list
) {
2316 wiphy
= &rdev
->wiphy
;
2318 spin_lock(®_requests_lock
);
2319 regd
= rdev
->requested_regd
;
2320 rdev
->requested_regd
= NULL
;
2321 spin_unlock(®_requests_lock
);
2326 tmp
= get_wiphy_regdom(wiphy
);
2327 rcu_assign_pointer(wiphy
->regd
, regd
);
2328 rcu_free_regdom(tmp
);
2330 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++)
2331 handle_band_custom(wiphy
, wiphy
->bands
[band
], regd
);
2333 reg_process_ht_flags(wiphy
);
2335 request
.wiphy_idx
= get_wiphy_idx(wiphy
);
2336 request
.alpha2
[0] = regd
->alpha2
[0];
2337 request
.alpha2
[1] = regd
->alpha2
[1];
2338 request
.initiator
= NL80211_REGDOM_SET_BY_DRIVER
;
2340 nl80211_send_wiphy_reg_change_event(&request
);
2343 reg_check_channels();
2346 static void reg_todo(struct work_struct
*work
)
2349 reg_process_pending_hints();
2350 reg_process_pending_beacon_hints();
2351 reg_process_self_managed_hints();
2355 static void queue_regulatory_request(struct regulatory_request
*request
)
2357 #ifdef CONFIG_CFG80211_REG_NOT_UPDATED
2359 * SAMSUNG FIX : Regulatory Configuration was update
2360 * via WIPHY_FLAG_CUSTOM_REGULATORY of Wi-Fi Driver.
2361 * Regulation should not updated even if device found other country Access Point Beacon once
2362 * since device should find around other Access Points.
2363 * 2014.1.8 Convergence Wi-Fi Core
2365 printk("regulatory is not upadted via %s.\n", __func__
);
2371 request
->alpha2
[0] = toupper(request
->alpha2
[0]);
2372 request
->alpha2
[1] = toupper(request
->alpha2
[1]);
2374 spin_lock(®_requests_lock
);
2375 list_add_tail(&request
->list
, ®_requests_list
);
2376 spin_unlock(®_requests_lock
);
2378 schedule_work(®_work
);
2382 * Core regulatory hint -- happens during cfg80211_init()
2383 * and when we restore regulatory settings.
2385 static int regulatory_hint_core(const char *alpha2
)
2387 struct regulatory_request
*request
;
2389 request
= kzalloc(sizeof(struct regulatory_request
), GFP_KERNEL
);
2393 request
->alpha2
[0] = alpha2
[0];
2394 request
->alpha2
[1] = alpha2
[1];
2395 request
->initiator
= NL80211_REGDOM_SET_BY_CORE
;
2397 queue_regulatory_request(request
);
2403 int regulatory_hint_user(const char *alpha2
,
2404 enum nl80211_user_reg_hint_type user_reg_hint_type
)
2406 struct regulatory_request
*request
;
2408 if (WARN_ON(!alpha2
))
2411 request
= kzalloc(sizeof(struct regulatory_request
), GFP_KERNEL
);
2415 request
->wiphy_idx
= WIPHY_IDX_INVALID
;
2416 request
->alpha2
[0] = alpha2
[0];
2417 request
->alpha2
[1] = alpha2
[1];
2418 request
->initiator
= NL80211_REGDOM_SET_BY_USER
;
2419 request
->user_reg_hint_type
= user_reg_hint_type
;
2421 /* Allow calling CRDA again */
2422 reset_crda_timeouts();
2424 queue_regulatory_request(request
);
2429 int regulatory_hint_indoor(bool is_indoor
, u32 portid
)
2431 spin_lock(®_indoor_lock
);
2433 /* It is possible that more than one user space process is trying to
2434 * configure the indoor setting. To handle such cases, clear the indoor
2435 * setting in case that some process does not think that the device
2436 * is operating in an indoor environment. In addition, if a user space
2437 * process indicates that it is controlling the indoor setting, save its
2438 * portid, i.e., make it the owner.
2440 reg_is_indoor
= is_indoor
;
2441 if (reg_is_indoor
) {
2442 if (!reg_is_indoor_portid
)
2443 reg_is_indoor_portid
= portid
;
2445 reg_is_indoor_portid
= 0;
2448 spin_unlock(®_indoor_lock
);
2451 reg_check_channels();
2456 void regulatory_netlink_notify(u32 portid
)
2458 spin_lock(®_indoor_lock
);
2460 if (reg_is_indoor_portid
!= portid
) {
2461 spin_unlock(®_indoor_lock
);
2465 reg_is_indoor
= false;
2466 reg_is_indoor_portid
= 0;
2468 spin_unlock(®_indoor_lock
);
2470 reg_check_channels();
2474 int regulatory_hint(struct wiphy
*wiphy
, const char *alpha2
)
2476 struct regulatory_request
*request
;
2478 if (WARN_ON(!alpha2
|| !wiphy
))
2481 wiphy
->regulatory_flags
&= ~REGULATORY_CUSTOM_REG
;
2483 request
= kzalloc(sizeof(struct regulatory_request
), GFP_KERNEL
);
2487 request
->wiphy_idx
= get_wiphy_idx(wiphy
);
2489 request
->alpha2
[0] = alpha2
[0];
2490 request
->alpha2
[1] = alpha2
[1];
2491 request
->initiator
= NL80211_REGDOM_SET_BY_DRIVER
;
2493 /* Allow calling CRDA again */
2494 reset_crda_timeouts();
2496 queue_regulatory_request(request
);
2500 EXPORT_SYMBOL(regulatory_hint
);
2502 void regulatory_hint_country_ie(struct wiphy
*wiphy
, enum ieee80211_band band
,
2503 const u8
*country_ie
, u8 country_ie_len
)
2506 enum environment_cap env
= ENVIRON_ANY
;
2507 struct regulatory_request
*request
= NULL
, *lr
;
2509 /* IE len must be evenly divisible by 2 */
2510 if (country_ie_len
& 0x01)
2513 if (country_ie_len
< IEEE80211_COUNTRY_IE_MIN_LEN
)
2516 request
= kzalloc(sizeof(*request
), GFP_KERNEL
);
2520 alpha2
[0] = country_ie
[0];
2521 alpha2
[1] = country_ie
[1];
2523 if (country_ie
[2] == 'I')
2524 env
= ENVIRON_INDOOR
;
2525 else if (country_ie
[2] == 'O')
2526 env
= ENVIRON_OUTDOOR
;
2529 lr
= get_last_request();
2535 * We will run this only upon a successful connection on cfg80211.
2536 * We leave conflict resolution to the workqueue, where can hold
2539 if (lr
->initiator
== NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
2540 lr
->wiphy_idx
!= WIPHY_IDX_INVALID
)
2543 request
->wiphy_idx
= get_wiphy_idx(wiphy
);
2544 request
->alpha2
[0] = alpha2
[0];
2545 request
->alpha2
[1] = alpha2
[1];
2546 request
->initiator
= NL80211_REGDOM_SET_BY_COUNTRY_IE
;
2547 request
->country_ie_env
= env
;
2549 /* Allow calling CRDA again */
2550 reset_crda_timeouts();
2552 queue_regulatory_request(request
);
2559 static void restore_alpha2(char *alpha2
, bool reset_user
)
2561 /* indicates there is no alpha2 to consider for restoration */
2565 /* The user setting has precedence over the module parameter */
2566 if (is_user_regdom_saved()) {
2567 /* Unless we're asked to ignore it and reset it */
2569 REG_DBG_PRINT("Restoring regulatory settings including user preference\n");
2570 user_alpha2
[0] = '9';
2571 user_alpha2
[1] = '7';
2574 * If we're ignoring user settings, we still need to
2575 * check the module parameter to ensure we put things
2576 * back as they were for a full restore.
2578 if (!is_world_regdom(ieee80211_regdom
)) {
2579 REG_DBG_PRINT("Keeping preference on module parameter ieee80211_regdom: %c%c\n",
2580 ieee80211_regdom
[0], ieee80211_regdom
[1]);
2581 alpha2
[0] = ieee80211_regdom
[0];
2582 alpha2
[1] = ieee80211_regdom
[1];
2585 REG_DBG_PRINT("Restoring regulatory settings while preserving user preference for: %c%c\n",
2586 user_alpha2
[0], user_alpha2
[1]);
2587 alpha2
[0] = user_alpha2
[0];
2588 alpha2
[1] = user_alpha2
[1];
2590 } else if (!is_world_regdom(ieee80211_regdom
)) {
2591 REG_DBG_PRINT("Keeping preference on module parameter ieee80211_regdom: %c%c\n",
2592 ieee80211_regdom
[0], ieee80211_regdom
[1]);
2593 alpha2
[0] = ieee80211_regdom
[0];
2594 alpha2
[1] = ieee80211_regdom
[1];
2596 REG_DBG_PRINT("Restoring regulatory settings\n");
2599 static void restore_custom_reg_settings(struct wiphy
*wiphy
)
2601 struct ieee80211_supported_band
*sband
;
2602 enum ieee80211_band band
;
2603 struct ieee80211_channel
*chan
;
2606 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++) {
2607 sband
= wiphy
->bands
[band
];
2610 for (i
= 0; i
< sband
->n_channels
; i
++) {
2611 chan
= &sband
->channels
[i
];
2612 chan
->flags
= chan
->orig_flags
;
2613 chan
->max_antenna_gain
= chan
->orig_mag
;
2614 chan
->max_power
= chan
->orig_mpwr
;
2615 chan
->beacon_found
= false;
2621 * Restoring regulatory settings involves ingoring any
2622 * possibly stale country IE information and user regulatory
2623 * settings if so desired, this includes any beacon hints
2624 * learned as we could have traveled outside to another country
2625 * after disconnection. To restore regulatory settings we do
2626 * exactly what we did at bootup:
2628 * - send a core regulatory hint
2629 * - send a user regulatory hint if applicable
2631 * Device drivers that send a regulatory hint for a specific country
2632 * keep their own regulatory domain on wiphy->regd so that does does
2633 * not need to be remembered.
2635 static void restore_regulatory_settings(bool reset_user
)
2638 char world_alpha2
[2];
2639 struct reg_beacon
*reg_beacon
, *btmp
;
2640 LIST_HEAD(tmp_reg_req_list
);
2641 struct cfg80211_registered_device
*rdev
;
2643 #ifdef CONFIG_CFG80211_REG_NOT_UPDATED
2645 * SAMSUNG FIX : Regulatory Configuration was update
2646 * via WIPHY_FLAG_CUSTOM_REGULATORY of Wi-Fi Driver.
2647 * Regulation should not updated even if device found other country Access Point Beacon once
2648 * since device should find around other Access Points.
2649 * 2014.1.8 Convergence Wi-Fi Core
2651 printk("regulatory is not upadted via %s.\n", __func__
);
2658 * Clear the indoor setting in case that it is not controlled by user
2659 * space, as otherwise there is no guarantee that the device is still
2660 * operating in an indoor environment.
2662 spin_lock(®_indoor_lock
);
2663 if (reg_is_indoor
&& !reg_is_indoor_portid
) {
2664 reg_is_indoor
= false;
2665 reg_check_channels();
2667 spin_unlock(®_indoor_lock
);
2669 reset_regdomains(true, &world_regdom
);
2670 restore_alpha2(alpha2
, reset_user
);
2673 * If there's any pending requests we simply
2674 * stash them to a temporary pending queue and
2675 * add then after we've restored regulatory
2678 spin_lock(®_requests_lock
);
2679 list_splice_tail_init(®_requests_list
, &tmp_reg_req_list
);
2680 spin_unlock(®_requests_lock
);
2682 /* Clear beacon hints */
2683 spin_lock_bh(®_pending_beacons_lock
);
2684 list_for_each_entry_safe(reg_beacon
, btmp
, ®_pending_beacons
, list
) {
2685 list_del(®_beacon
->list
);
2688 spin_unlock_bh(®_pending_beacons_lock
);
2690 list_for_each_entry_safe(reg_beacon
, btmp
, ®_beacon_list
, list
) {
2691 list_del(®_beacon
->list
);
2695 /* First restore to the basic regulatory settings */
2696 world_alpha2
[0] = cfg80211_world_regdom
->alpha2
[0];
2697 world_alpha2
[1] = cfg80211_world_regdom
->alpha2
[1];
2699 list_for_each_entry(rdev
, &cfg80211_rdev_list
, list
) {
2700 if (rdev
->wiphy
.regulatory_flags
& REGULATORY_WIPHY_SELF_MANAGED
)
2702 if (rdev
->wiphy
.regulatory_flags
& REGULATORY_CUSTOM_REG
)
2703 restore_custom_reg_settings(&rdev
->wiphy
);
2706 regulatory_hint_core(world_alpha2
);
2709 * This restores the ieee80211_regdom module parameter
2710 * preference or the last user requested regulatory
2711 * settings, user regulatory settings takes precedence.
2713 if (is_an_alpha2(alpha2
))
2714 regulatory_hint_user(alpha2
, NL80211_USER_REG_HINT_USER
);
2716 spin_lock(®_requests_lock
);
2717 list_splice_tail_init(&tmp_reg_req_list
, ®_requests_list
);
2718 spin_unlock(®_requests_lock
);
2720 REG_DBG_PRINT("Kicking the queue\n");
2722 schedule_work(®_work
);
2725 void regulatory_hint_disconnect(void)
2727 REG_DBG_PRINT("All devices are disconnected, going to restore regulatory settings\n");
2728 restore_regulatory_settings(false);
2731 static bool freq_is_chan_12_13_14(u16 freq
)
2733 if (freq
== ieee80211_channel_to_frequency(12, IEEE80211_BAND_2GHZ
) ||
2734 freq
== ieee80211_channel_to_frequency(13, IEEE80211_BAND_2GHZ
) ||
2735 freq
== ieee80211_channel_to_frequency(14, IEEE80211_BAND_2GHZ
))
2740 static bool pending_reg_beacon(struct ieee80211_channel
*beacon_chan
)
2742 struct reg_beacon
*pending_beacon
;
2744 list_for_each_entry(pending_beacon
, ®_pending_beacons
, list
)
2745 if (beacon_chan
->center_freq
==
2746 pending_beacon
->chan
.center_freq
)
2751 int regulatory_hint_found_beacon(struct wiphy
*wiphy
,
2752 struct ieee80211_channel
*beacon_chan
,
2755 struct reg_beacon
*reg_beacon
;
2758 #ifdef CONFIG_CFG80211_REG_NOT_UPDATED
2760 * SAMSUNG FIX : Regulatory Configuration was update
2761 * via WIPHY_FLAG_CUSTOM_REGULATORY of Wi-Fi Driver.
2762 * Regulation should not updated even if device found other country Access Point Beacon once
2763 * since device should find around other Access Points.
2764 * 2014.1.8 Convergence Wi-Fi Core
2769 if (beacon_chan
->beacon_found
||
2770 beacon_chan
->flags
& IEEE80211_CHAN_RADAR
||
2771 (beacon_chan
->band
== IEEE80211_BAND_2GHZ
&&
2772 !freq_is_chan_12_13_14(beacon_chan
->center_freq
)))
2775 spin_lock_bh(®_pending_beacons_lock
);
2776 processing
= pending_reg_beacon(beacon_chan
);
2777 spin_unlock_bh(®_pending_beacons_lock
);
2782 reg_beacon
= kzalloc(sizeof(struct reg_beacon
), gfp
);
2786 REG_DBG_PRINT("Found new beacon on frequency: %d MHz (Ch %d) on %s\n",
2787 beacon_chan
->center_freq
,
2788 ieee80211_frequency_to_channel(beacon_chan
->center_freq
),
2791 memcpy(®_beacon
->chan
, beacon_chan
,
2792 sizeof(struct ieee80211_channel
));
2795 * Since we can be called from BH or and non-BH context
2796 * we must use spin_lock_bh()
2798 spin_lock_bh(®_pending_beacons_lock
);
2799 list_add_tail(®_beacon
->list
, ®_pending_beacons
);
2800 spin_unlock_bh(®_pending_beacons_lock
);
2802 schedule_work(®_work
);
2807 static void print_rd_rules(const struct ieee80211_regdomain
*rd
)
2810 const struct ieee80211_reg_rule
*reg_rule
= NULL
;
2811 const struct ieee80211_freq_range
*freq_range
= NULL
;
2812 const struct ieee80211_power_rule
*power_rule
= NULL
;
2813 char bw
[32], cac_time
[32];
2815 pr_info(" (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp), (dfs_cac_time)\n");
2817 for (i
= 0; i
< rd
->n_reg_rules
; i
++) {
2818 reg_rule
= &rd
->reg_rules
[i
];
2819 freq_range
= ®_rule
->freq_range
;
2820 power_rule
= ®_rule
->power_rule
;
2822 if (reg_rule
->flags
& NL80211_RRF_AUTO_BW
)
2823 snprintf(bw
, sizeof(bw
), "%d KHz, %d KHz AUTO",
2824 freq_range
->max_bandwidth_khz
,
2825 reg_get_max_bandwidth(rd
, reg_rule
));
2827 snprintf(bw
, sizeof(bw
), "%d KHz",
2828 freq_range
->max_bandwidth_khz
);
2830 if (reg_rule
->flags
& NL80211_RRF_DFS
)
2831 scnprintf(cac_time
, sizeof(cac_time
), "%u s",
2832 reg_rule
->dfs_cac_ms
/1000);
2834 scnprintf(cac_time
, sizeof(cac_time
), "N/A");
2838 * There may not be documentation for max antenna gain
2839 * in certain regions
2841 if (power_rule
->max_antenna_gain
)
2842 pr_info(" (%d KHz - %d KHz @ %s), (%d mBi, %d mBm), (%s)\n",
2843 freq_range
->start_freq_khz
,
2844 freq_range
->end_freq_khz
,
2846 power_rule
->max_antenna_gain
,
2847 power_rule
->max_eirp
,
2850 pr_info(" (%d KHz - %d KHz @ %s), (N/A, %d mBm), (%s)\n",
2851 freq_range
->start_freq_khz
,
2852 freq_range
->end_freq_khz
,
2854 power_rule
->max_eirp
,
2859 bool reg_supported_dfs_region(enum nl80211_dfs_regions dfs_region
)
2861 switch (dfs_region
) {
2862 case NL80211_DFS_UNSET
:
2863 case NL80211_DFS_FCC
:
2864 case NL80211_DFS_ETSI
:
2865 case NL80211_DFS_JP
:
2868 REG_DBG_PRINT("Ignoring uknown DFS master region: %d\n",
2874 static void print_regdomain(const struct ieee80211_regdomain
*rd
)
2876 struct regulatory_request
*lr
= get_last_request();
2878 if (is_intersected_alpha2(rd
->alpha2
)) {
2879 if (lr
->initiator
== NL80211_REGDOM_SET_BY_COUNTRY_IE
) {
2880 struct cfg80211_registered_device
*rdev
;
2881 rdev
= cfg80211_rdev_by_wiphy_idx(lr
->wiphy_idx
);
2883 pr_info("Current regulatory domain updated by AP to: %c%c\n",
2884 rdev
->country_ie_alpha2
[0],
2885 rdev
->country_ie_alpha2
[1]);
2887 pr_info("Current regulatory domain intersected:\n");
2889 pr_info("Current regulatory domain intersected:\n");
2890 } else if (is_world_regdom(rd
->alpha2
)) {
2891 pr_info("World regulatory domain updated:\n");
2893 if (is_unknown_alpha2(rd
->alpha2
))
2894 pr_info("Regulatory domain changed to driver built-in settings (unknown country)\n");
2896 if (reg_request_cell_base(lr
))
2897 pr_info("Regulatory domain changed to country: %c%c by Cell Station\n",
2898 rd
->alpha2
[0], rd
->alpha2
[1]);
2900 pr_info("Regulatory domain changed to country: %c%c\n",
2901 rd
->alpha2
[0], rd
->alpha2
[1]);
2905 pr_info(" DFS Master region: %s", reg_dfs_region_str(rd
->dfs_region
));
2909 static void print_regdomain_info(const struct ieee80211_regdomain
*rd
)
2911 pr_info("Regulatory domain: %c%c\n", rd
->alpha2
[0], rd
->alpha2
[1]);
2915 static int reg_set_rd_core(const struct ieee80211_regdomain
*rd
)
2917 if (!is_world_regdom(rd
->alpha2
))
2919 update_world_regdomain(rd
);
2923 static int reg_set_rd_user(const struct ieee80211_regdomain
*rd
,
2924 struct regulatory_request
*user_request
)
2926 const struct ieee80211_regdomain
*intersected_rd
= NULL
;
2928 if (!regdom_changes(rd
->alpha2
))
2931 if (!is_valid_rd(rd
)) {
2932 pr_err("Invalid regulatory domain detected:\n");
2933 print_regdomain_info(rd
);
2937 if (!user_request
->intersect
) {
2938 reset_regdomains(false, rd
);
2942 intersected_rd
= regdom_intersect(rd
, get_cfg80211_regdom());
2943 if (!intersected_rd
)
2948 reset_regdomains(false, intersected_rd
);
2953 static int reg_set_rd_driver(const struct ieee80211_regdomain
*rd
,
2954 struct regulatory_request
*driver_request
)
2956 const struct ieee80211_regdomain
*regd
;
2957 const struct ieee80211_regdomain
*intersected_rd
= NULL
;
2958 const struct ieee80211_regdomain
*tmp
;
2959 struct wiphy
*request_wiphy
;
2961 if (is_world_regdom(rd
->alpha2
))
2964 if (!regdom_changes(rd
->alpha2
))
2967 if (!is_valid_rd(rd
)) {
2968 pr_err("Invalid regulatory domain detected:\n");
2969 print_regdomain_info(rd
);
2973 request_wiphy
= wiphy_idx_to_wiphy(driver_request
->wiphy_idx
);
2977 if (!driver_request
->intersect
) {
2978 if (request_wiphy
->regd
)
2981 regd
= reg_copy_regd(rd
);
2983 return PTR_ERR(regd
);
2985 rcu_assign_pointer(request_wiphy
->regd
, regd
);
2986 reset_regdomains(false, rd
);
2990 intersected_rd
= regdom_intersect(rd
, get_cfg80211_regdom());
2991 if (!intersected_rd
)
2995 * We can trash what CRDA provided now.
2996 * However if a driver requested this specific regulatory
2997 * domain we keep it for its private use
2999 tmp
= get_wiphy_regdom(request_wiphy
);
3000 rcu_assign_pointer(request_wiphy
->regd
, rd
);
3001 rcu_free_regdom(tmp
);
3005 reset_regdomains(false, intersected_rd
);
3010 static int reg_set_rd_country_ie(const struct ieee80211_regdomain
*rd
,
3011 struct regulatory_request
*country_ie_request
)
3013 struct wiphy
*request_wiphy
;
3015 if (!is_alpha2_set(rd
->alpha2
) && !is_an_alpha2(rd
->alpha2
) &&
3016 !is_unknown_alpha2(rd
->alpha2
))
3020 * Lets only bother proceeding on the same alpha2 if the current
3021 * rd is non static (it means CRDA was present and was used last)
3022 * and the pending request came in from a country IE
3025 if (!is_valid_rd(rd
)) {
3026 pr_err("Invalid regulatory domain detected:\n");
3027 print_regdomain_info(rd
);
3031 request_wiphy
= wiphy_idx_to_wiphy(country_ie_request
->wiphy_idx
);
3035 if (country_ie_request
->intersect
)
3038 reset_regdomains(false, rd
);
3043 * Use this call to set the current regulatory domain. Conflicts with
3044 * multiple drivers can be ironed out later. Caller must've already
3045 * kmalloc'd the rd structure.
3047 int set_regdom(const struct ieee80211_regdomain
*rd
,
3048 enum ieee80211_regd_source regd_src
)
3050 struct regulatory_request
*lr
;
3051 bool user_reset
= false;
3054 if (!reg_is_valid_request(rd
->alpha2
)) {
3059 if (regd_src
== REGD_SOURCE_CRDA
)
3060 reset_crda_timeouts();
3062 lr
= get_last_request();
3064 /* Note that this doesn't update the wiphys, this is done below */
3065 switch (lr
->initiator
) {
3066 case NL80211_REGDOM_SET_BY_CORE
:
3067 r
= reg_set_rd_core(rd
);
3069 case NL80211_REGDOM_SET_BY_USER
:
3070 r
= reg_set_rd_user(rd
, lr
);
3073 case NL80211_REGDOM_SET_BY_DRIVER
:
3074 r
= reg_set_rd_driver(rd
, lr
);
3076 case NL80211_REGDOM_SET_BY_COUNTRY_IE
:
3077 r
= reg_set_rd_country_ie(rd
, lr
);
3080 WARN(1, "invalid initiator %d\n", lr
->initiator
);
3088 reg_set_request_processed();
3091 /* Back to world regulatory in case of errors */
3092 restore_regulatory_settings(user_reset
);
3099 /* This would make this whole thing pointless */
3100 if (WARN_ON(!lr
->intersect
&& rd
!= get_cfg80211_regdom()))
3103 /* update all wiphys now with the new established regulatory domain */
3104 update_all_wiphy_regulatory(lr
->initiator
);
3106 print_regdomain(get_cfg80211_regdom());
3108 nl80211_send_reg_change_event(lr
);
3110 reg_set_request_processed();
3115 static int __regulatory_set_wiphy_regd(struct wiphy
*wiphy
,
3116 struct ieee80211_regdomain
*rd
)
3118 const struct ieee80211_regdomain
*regd
;
3119 const struct ieee80211_regdomain
*prev_regd
;
3120 struct cfg80211_registered_device
*rdev
;
3122 if (WARN_ON(!wiphy
|| !rd
))
3125 if (WARN(!(wiphy
->regulatory_flags
& REGULATORY_WIPHY_SELF_MANAGED
),
3126 "wiphy should have REGULATORY_WIPHY_SELF_MANAGED\n"))
3129 if (WARN(!is_valid_rd(rd
), "Invalid regulatory domain detected\n")) {
3130 print_regdomain_info(rd
);
3134 regd
= reg_copy_regd(rd
);
3136 return PTR_ERR(regd
);
3138 rdev
= wiphy_to_rdev(wiphy
);
3140 spin_lock(®_requests_lock
);
3141 prev_regd
= rdev
->requested_regd
;
3142 rdev
->requested_regd
= regd
;
3143 spin_unlock(®_requests_lock
);
3149 int regulatory_set_wiphy_regd(struct wiphy
*wiphy
,
3150 struct ieee80211_regdomain
*rd
)
3152 int ret
= __regulatory_set_wiphy_regd(wiphy
, rd
);
3157 schedule_work(®_work
);
3160 EXPORT_SYMBOL(regulatory_set_wiphy_regd
);
3162 int regulatory_set_wiphy_regd_sync_rtnl(struct wiphy
*wiphy
,
3163 struct ieee80211_regdomain
*rd
)
3169 ret
= __regulatory_set_wiphy_regd(wiphy
, rd
);
3173 /* process the request immediately */
3174 reg_process_self_managed_hints();
3177 EXPORT_SYMBOL(regulatory_set_wiphy_regd_sync_rtnl
);
3179 void wiphy_regulatory_register(struct wiphy
*wiphy
)
3181 struct regulatory_request
*lr
;
3183 /* self-managed devices ignore external hints */
3184 if (wiphy
->regulatory_flags
& REGULATORY_WIPHY_SELF_MANAGED
)
3185 wiphy
->regulatory_flags
|= REGULATORY_DISABLE_BEACON_HINTS
|
3186 REGULATORY_COUNTRY_IE_IGNORE
;
3188 if (!reg_dev_ignore_cell_hint(wiphy
))
3189 reg_num_devs_support_basehint
++;
3191 lr
= get_last_request();
3192 wiphy_update_regulatory(wiphy
, lr
->initiator
);
3195 void wiphy_regulatory_deregister(struct wiphy
*wiphy
)
3197 struct wiphy
*request_wiphy
= NULL
;
3198 struct regulatory_request
*lr
;
3200 lr
= get_last_request();
3202 if (!reg_dev_ignore_cell_hint(wiphy
))
3203 reg_num_devs_support_basehint
--;
3205 rcu_free_regdom(get_wiphy_regdom(wiphy
));
3206 RCU_INIT_POINTER(wiphy
->regd
, NULL
);
3209 request_wiphy
= wiphy_idx_to_wiphy(lr
->wiphy_idx
);
3211 if (!request_wiphy
|| request_wiphy
!= wiphy
)
3214 lr
->wiphy_idx
= WIPHY_IDX_INVALID
;
3215 lr
->country_ie_env
= ENVIRON_ANY
;
3219 * See http://www.fcc.gov/document/5-ghz-unlicensed-spectrum-unii, for
3220 * UNII band definitions
3222 int cfg80211_get_unii(int freq
)
3225 if (freq
>= 5150 && freq
<= 5250)
3229 if (freq
> 5250 && freq
<= 5350)
3233 if (freq
> 5350 && freq
<= 5470)
3237 if (freq
> 5470 && freq
<= 5725)
3241 if (freq
> 5725 && freq
<= 5825)
3247 bool regulatory_indoor_allowed(void)
3249 return reg_is_indoor
;
3252 int __init
regulatory_init(void)
3256 reg_pdev
= platform_device_register_simple("regulatory", 0, NULL
, 0);
3257 if (IS_ERR(reg_pdev
))
3258 return PTR_ERR(reg_pdev
);
3260 spin_lock_init(®_requests_lock
);
3261 spin_lock_init(®_pending_beacons_lock
);
3262 spin_lock_init(®_indoor_lock
);
3264 reg_regdb_size_check();
3266 rcu_assign_pointer(cfg80211_regdomain
, cfg80211_world_regdom
);
3268 user_alpha2
[0] = '9';
3269 user_alpha2
[1] = '7';
3271 /* We always try to get an update for the static regdomain */
3272 err
= regulatory_hint_core(cfg80211_world_regdom
->alpha2
);
3274 if (err
== -ENOMEM
) {
3275 platform_device_unregister(reg_pdev
);
3279 * N.B. kobject_uevent_env() can fail mainly for when we're out
3280 * memory which is handled and propagated appropriately above
3281 * but it can also fail during a netlink_broadcast() or during
3282 * early boot for call_usermodehelper(). For now treat these
3283 * errors as non-fatal.
3285 pr_err("kobject_uevent_env() was unable to call CRDA during init\n");
3289 * Finally, if the user set the module parameter treat it
3292 if (!is_world_regdom(ieee80211_regdom
))
3293 regulatory_hint_user(ieee80211_regdom
,
3294 NL80211_USER_REG_HINT_USER
);
3299 void regulatory_exit(void)
3301 struct regulatory_request
*reg_request
, *tmp
;
3302 struct reg_beacon
*reg_beacon
, *btmp
;
3304 cancel_work_sync(®_work
);
3305 cancel_crda_timeout_sync();
3306 cancel_delayed_work_sync(®_check_chans
);
3308 /* Lock to suppress warnings */
3310 reset_regdomains(true, NULL
);
3313 dev_set_uevent_suppress(®_pdev
->dev
, true);
3315 platform_device_unregister(reg_pdev
);
3317 list_for_each_entry_safe(reg_beacon
, btmp
, ®_pending_beacons
, list
) {
3318 list_del(®_beacon
->list
);
3322 list_for_each_entry_safe(reg_beacon
, btmp
, ®_beacon_list
, list
) {
3323 list_del(®_beacon
->list
);
3327 list_for_each_entry_safe(reg_request
, tmp
, ®_requests_list
, list
) {
3328 list_del(®_request
->list
);