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>
7 * Permission to use, copy, modify, and/or distribute this software for any
8 * purpose with or without fee is hereby granted, provided that the above
9 * copyright notice and this permission notice appear in all copies.
11 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
12 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
13 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
14 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
15 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
16 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
17 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
22 * DOC: Wireless regulatory infrastructure
24 * The usual implementation is for a driver to read a device EEPROM to
25 * determine which regulatory domain it should be operating under, then
26 * looking up the allowable channels in a driver-local table and finally
27 * registering those channels in the wiphy structure.
29 * Another set of compliance enforcement is for drivers to use their
30 * own compliance limits which can be stored on the EEPROM. The host
31 * driver or firmware may ensure these are used.
33 * In addition to all this we provide an extra layer of regulatory
34 * conformance. For drivers which do not have any regulatory
35 * information CRDA provides the complete regulatory solution.
36 * For others it provides a community effort on further restrictions
37 * to enhance compliance.
39 * Note: When number of rules --> infinity we will not be able to
40 * index on alpha2 any more, instead we'll probably have to
41 * rely on some SHA1 checksum of the regdomain for example.
45 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
47 #include <linux/kernel.h>
48 #include <linux/export.h>
49 #include <linux/slab.h>
50 #include <linux/list.h>
51 #include <linux/ctype.h>
52 #include <linux/nl80211.h>
53 #include <linux/platform_device.h>
54 #include <linux/moduleparam.h>
55 #include <net/cfg80211.h>
61 #ifdef CONFIG_CFG80211_REG_DEBUG
62 #define REG_DBG_PRINT(format, args...) \
63 printk(KERN_DEBUG pr_fmt(format), ##args)
65 #define REG_DBG_PRINT(args...)
68 enum reg_request_treatment
{
75 static struct regulatory_request core_request_world
= {
76 .initiator
= NL80211_REGDOM_SET_BY_CORE
,
81 .country_ie_env
= ENVIRON_ANY
,
85 * Receipt of information from last regulatory request,
86 * protected by RTNL (and can be accessed with RCU protection)
88 static struct regulatory_request __rcu
*last_request
=
89 (void __rcu
*)&core_request_world
;
91 /* To trigger userspace events */
92 static struct platform_device
*reg_pdev
;
95 * Central wireless core regulatory domains, we only need two,
96 * the current one and a world regulatory domain in case we have no
97 * information to give us an alpha2.
98 * (protected by RTNL, can be read under RCU)
100 const struct ieee80211_regdomain __rcu
*cfg80211_regdomain
;
103 * Number of devices that registered to the core
104 * that support cellular base station regulatory hints
105 * (protected by RTNL)
107 static int reg_num_devs_support_basehint
;
109 static const struct ieee80211_regdomain
*get_cfg80211_regdom(void)
111 return rtnl_dereference(cfg80211_regdomain
);
114 static const struct ieee80211_regdomain
*get_wiphy_regdom(struct wiphy
*wiphy
)
116 return rtnl_dereference(wiphy
->regd
);
119 static const char *reg_dfs_region_str(enum nl80211_dfs_regions dfs_region
)
121 switch (dfs_region
) {
122 case NL80211_DFS_UNSET
:
124 case NL80211_DFS_FCC
:
126 case NL80211_DFS_ETSI
:
134 enum nl80211_dfs_regions
reg_get_dfs_region(struct wiphy
*wiphy
)
136 const struct ieee80211_regdomain
*regd
= NULL
;
137 const struct ieee80211_regdomain
*wiphy_regd
= NULL
;
139 regd
= get_cfg80211_regdom();
143 wiphy_regd
= get_wiphy_regdom(wiphy
);
147 if (wiphy_regd
->dfs_region
== regd
->dfs_region
)
150 REG_DBG_PRINT("%s: device specific dfs_region "
151 "(%s) disagrees with cfg80211's "
152 "central dfs_region (%s)\n",
153 dev_name(&wiphy
->dev
),
154 reg_dfs_region_str(wiphy_regd
->dfs_region
),
155 reg_dfs_region_str(regd
->dfs_region
));
158 return regd
->dfs_region
;
161 static void rcu_free_regdom(const struct ieee80211_regdomain
*r
)
165 kfree_rcu((struct ieee80211_regdomain
*)r
, rcu_head
);
168 static struct regulatory_request
*get_last_request(void)
170 return rcu_dereference_rtnl(last_request
);
173 /* Used to queue up regulatory hints */
174 static LIST_HEAD(reg_requests_list
);
175 static spinlock_t reg_requests_lock
;
177 /* Used to queue up beacon hints for review */
178 static LIST_HEAD(reg_pending_beacons
);
179 static spinlock_t reg_pending_beacons_lock
;
181 /* Used to keep track of processed beacon hints */
182 static LIST_HEAD(reg_beacon_list
);
185 struct list_head list
;
186 struct ieee80211_channel chan
;
189 static void reg_todo(struct work_struct
*work
);
190 static DECLARE_WORK(reg_work
, reg_todo
);
192 static void reg_timeout_work(struct work_struct
*work
);
193 static DECLARE_DELAYED_WORK(reg_timeout
, reg_timeout_work
);
195 /* We keep a static world regulatory domain in case of the absence of CRDA */
196 static const struct ieee80211_regdomain world_regdom
= {
200 /* IEEE 802.11b/g, channels 1..11 */
201 REG_RULE(2412-10, 2462+10, 40, 6, 20, 0),
202 /* IEEE 802.11b/g, channels 12..13. */
203 REG_RULE(2467-10, 2472+10, 40, 6, 20,
205 /* IEEE 802.11 channel 14 - Only JP enables
206 * this and for 802.11b only */
207 REG_RULE(2484-10, 2484+10, 20, 6, 20,
209 NL80211_RRF_NO_OFDM
),
210 /* IEEE 802.11a, channel 36..48 */
211 REG_RULE(5180-10, 5240+10, 160, 6, 20,
214 /* IEEE 802.11a, channel 52..64 - DFS required */
215 REG_RULE(5260-10, 5320+10, 160, 6, 20,
219 /* IEEE 802.11a, channel 100..144 - DFS required */
220 REG_RULE(5500-10, 5720+10, 160, 6, 20,
224 /* IEEE 802.11a, channel 149..165 */
225 REG_RULE(5745-10, 5825+10, 80, 6, 20,
228 /* IEEE 802.11ad (60gHz), channels 1..3 */
229 REG_RULE(56160+2160*1-1080, 56160+2160*3+1080, 2160, 0, 0, 0),
233 /* protected by RTNL */
234 static const struct ieee80211_regdomain
*cfg80211_world_regdom
=
237 static char *ieee80211_regdom
= "00";
238 static char user_alpha2
[2];
240 module_param(ieee80211_regdom
, charp
, 0444);
241 MODULE_PARM_DESC(ieee80211_regdom
, "IEEE 802.11 regulatory domain code");
243 static void reg_free_request(struct regulatory_request
*lr
)
245 if (lr
!= &core_request_world
&& lr
)
246 kfree_rcu(lr
, rcu_head
);
249 static void reg_update_last_request(struct regulatory_request
*request
)
251 struct regulatory_request
*lr
;
253 lr
= get_last_request();
257 reg_free_request(lr
);
258 rcu_assign_pointer(last_request
, request
);
261 static void reset_regdomains(bool full_reset
,
262 const struct ieee80211_regdomain
*new_regdom
)
264 const struct ieee80211_regdomain
*r
;
268 r
= get_cfg80211_regdom();
270 /* avoid freeing static information or freeing something twice */
271 if (r
== cfg80211_world_regdom
)
273 if (cfg80211_world_regdom
== &world_regdom
)
274 cfg80211_world_regdom
= NULL
;
275 if (r
== &world_regdom
)
279 rcu_free_regdom(cfg80211_world_regdom
);
281 cfg80211_world_regdom
= &world_regdom
;
282 rcu_assign_pointer(cfg80211_regdomain
, new_regdom
);
287 reg_update_last_request(&core_request_world
);
291 * Dynamic world regulatory domain requested by the wireless
292 * core upon initialization
294 static void update_world_regdomain(const struct ieee80211_regdomain
*rd
)
296 struct regulatory_request
*lr
;
298 lr
= get_last_request();
302 reset_regdomains(false, rd
);
304 cfg80211_world_regdom
= rd
;
307 bool is_world_regdom(const char *alpha2
)
311 return alpha2
[0] == '0' && alpha2
[1] == '0';
314 static bool is_alpha2_set(const char *alpha2
)
318 return alpha2
[0] && alpha2
[1];
321 static bool is_unknown_alpha2(const char *alpha2
)
326 * Special case where regulatory domain was built by driver
327 * but a specific alpha2 cannot be determined
329 return alpha2
[0] == '9' && alpha2
[1] == '9';
332 static bool is_intersected_alpha2(const char *alpha2
)
337 * Special case where regulatory domain is the
338 * result of an intersection between two regulatory domain
341 return alpha2
[0] == '9' && alpha2
[1] == '8';
344 static bool is_an_alpha2(const char *alpha2
)
348 return isalpha(alpha2
[0]) && isalpha(alpha2
[1]);
351 static bool alpha2_equal(const char *alpha2_x
, const char *alpha2_y
)
353 if (!alpha2_x
|| !alpha2_y
)
355 return alpha2_x
[0] == alpha2_y
[0] && alpha2_x
[1] == alpha2_y
[1];
358 static bool regdom_changes(const char *alpha2
)
360 const struct ieee80211_regdomain
*r
= get_cfg80211_regdom();
364 return !alpha2_equal(r
->alpha2
, alpha2
);
368 * The NL80211_REGDOM_SET_BY_USER regdom alpha2 is cached, this lets
369 * you know if a valid regulatory hint with NL80211_REGDOM_SET_BY_USER
370 * has ever been issued.
372 static bool is_user_regdom_saved(void)
374 if (user_alpha2
[0] == '9' && user_alpha2
[1] == '7')
377 /* This would indicate a mistake on the design */
378 if (WARN(!is_world_regdom(user_alpha2
) && !is_an_alpha2(user_alpha2
),
379 "Unexpected user alpha2: %c%c\n",
380 user_alpha2
[0], user_alpha2
[1]))
386 static const struct ieee80211_regdomain
*
387 reg_copy_regd(const struct ieee80211_regdomain
*src_regd
)
389 struct ieee80211_regdomain
*regd
;
394 sizeof(struct ieee80211_regdomain
) +
395 src_regd
->n_reg_rules
* sizeof(struct ieee80211_reg_rule
);
397 regd
= kzalloc(size_of_regd
, GFP_KERNEL
);
399 return ERR_PTR(-ENOMEM
);
401 memcpy(regd
, src_regd
, sizeof(struct ieee80211_regdomain
));
403 for (i
= 0; i
< src_regd
->n_reg_rules
; i
++)
404 memcpy(®d
->reg_rules
[i
], &src_regd
->reg_rules
[i
],
405 sizeof(struct ieee80211_reg_rule
));
410 #ifdef CONFIG_CFG80211_INTERNAL_REGDB
411 struct reg_regdb_search_request
{
413 struct list_head list
;
416 static LIST_HEAD(reg_regdb_search_list
);
417 static DEFINE_MUTEX(reg_regdb_search_mutex
);
419 static void reg_regdb_search(struct work_struct
*work
)
421 struct reg_regdb_search_request
*request
;
422 const struct ieee80211_regdomain
*curdom
, *regdom
= NULL
;
427 mutex_lock(®_regdb_search_mutex
);
428 while (!list_empty(®_regdb_search_list
)) {
429 request
= list_first_entry(®_regdb_search_list
,
430 struct reg_regdb_search_request
,
432 list_del(&request
->list
);
434 for (i
= 0; i
< reg_regdb_size
; i
++) {
435 curdom
= reg_regdb
[i
];
437 if (alpha2_equal(request
->alpha2
, curdom
->alpha2
)) {
438 regdom
= reg_copy_regd(curdom
);
445 mutex_unlock(®_regdb_search_mutex
);
447 if (!IS_ERR_OR_NULL(regdom
))
453 static DECLARE_WORK(reg_regdb_work
, reg_regdb_search
);
455 static void reg_regdb_query(const char *alpha2
)
457 struct reg_regdb_search_request
*request
;
462 request
= kzalloc(sizeof(struct reg_regdb_search_request
), GFP_KERNEL
);
466 memcpy(request
->alpha2
, alpha2
, 2);
468 mutex_lock(®_regdb_search_mutex
);
469 list_add_tail(&request
->list
, ®_regdb_search_list
);
470 mutex_unlock(®_regdb_search_mutex
);
472 schedule_work(®_regdb_work
);
475 /* Feel free to add any other sanity checks here */
476 static void reg_regdb_size_check(void)
478 /* We should ideally BUILD_BUG_ON() but then random builds would fail */
479 WARN_ONCE(!reg_regdb_size
, "db.txt is empty, you should update it...");
482 static inline void reg_regdb_size_check(void) {}
483 static inline void reg_regdb_query(const char *alpha2
) {}
484 #endif /* CONFIG_CFG80211_INTERNAL_REGDB */
487 * This lets us keep regulatory code which is updated on a regulatory
488 * basis in userspace.
490 static int call_crda(const char *alpha2
)
493 char *env
[] = { country
, NULL
};
495 snprintf(country
, sizeof(country
), "COUNTRY=%c%c",
496 alpha2
[0], alpha2
[1]);
498 if (!is_world_regdom((char *) alpha2
))
499 pr_info("Calling CRDA for country: %c%c\n",
500 alpha2
[0], alpha2
[1]);
502 pr_info("Calling CRDA to update world regulatory domain\n");
504 /* query internal regulatory database (if it exists) */
505 reg_regdb_query(alpha2
);
507 return kobject_uevent_env(®_pdev
->dev
.kobj
, KOBJ_CHANGE
, env
);
510 static enum reg_request_treatment
511 reg_call_crda(struct regulatory_request
*request
)
513 if (call_crda(request
->alpha2
))
514 return REG_REQ_IGNORE
;
518 bool reg_is_valid_request(const char *alpha2
)
520 struct regulatory_request
*lr
= get_last_request();
522 if (!lr
|| lr
->processed
)
525 return alpha2_equal(lr
->alpha2
, alpha2
);
528 static const struct ieee80211_regdomain
*reg_get_regdomain(struct wiphy
*wiphy
)
530 struct regulatory_request
*lr
= get_last_request();
533 * Follow the driver's regulatory domain, if present, unless a country
534 * IE has been processed or a user wants to help complaince further
536 if (lr
->initiator
!= NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
537 lr
->initiator
!= NL80211_REGDOM_SET_BY_USER
&&
539 return get_wiphy_regdom(wiphy
);
541 return get_cfg80211_regdom();
544 unsigned int reg_get_max_bandwidth(const struct ieee80211_regdomain
*rd
,
545 const struct ieee80211_reg_rule
*rule
)
547 const struct ieee80211_freq_range
*freq_range
= &rule
->freq_range
;
548 const struct ieee80211_freq_range
*freq_range_tmp
;
549 const struct ieee80211_reg_rule
*tmp
;
550 u32 start_freq
, end_freq
, idx
, no
;
552 for (idx
= 0; idx
< rd
->n_reg_rules
; idx
++)
553 if (rule
== &rd
->reg_rules
[idx
])
556 if (idx
== rd
->n_reg_rules
)
563 tmp
= &rd
->reg_rules
[--no
];
564 freq_range_tmp
= &tmp
->freq_range
;
566 if (freq_range_tmp
->end_freq_khz
< freq_range
->start_freq_khz
)
569 freq_range
= freq_range_tmp
;
572 start_freq
= freq_range
->start_freq_khz
;
575 freq_range
= &rule
->freq_range
;
578 while (no
< rd
->n_reg_rules
- 1) {
579 tmp
= &rd
->reg_rules
[++no
];
580 freq_range_tmp
= &tmp
->freq_range
;
582 if (freq_range_tmp
->start_freq_khz
> freq_range
->end_freq_khz
)
585 freq_range
= freq_range_tmp
;
588 end_freq
= freq_range
->end_freq_khz
;
590 return end_freq
- start_freq
;
593 /* Sanity check on a regulatory rule */
594 static bool is_valid_reg_rule(const struct ieee80211_reg_rule
*rule
)
596 const struct ieee80211_freq_range
*freq_range
= &rule
->freq_range
;
599 if (freq_range
->start_freq_khz
<= 0 || freq_range
->end_freq_khz
<= 0)
602 if (freq_range
->start_freq_khz
> freq_range
->end_freq_khz
)
605 freq_diff
= freq_range
->end_freq_khz
- freq_range
->start_freq_khz
;
607 if (freq_range
->end_freq_khz
<= freq_range
->start_freq_khz
||
608 freq_range
->max_bandwidth_khz
> freq_diff
)
614 static bool is_valid_rd(const struct ieee80211_regdomain
*rd
)
616 const struct ieee80211_reg_rule
*reg_rule
= NULL
;
619 if (!rd
->n_reg_rules
)
622 if (WARN_ON(rd
->n_reg_rules
> NL80211_MAX_SUPP_REG_RULES
))
625 for (i
= 0; i
< rd
->n_reg_rules
; i
++) {
626 reg_rule
= &rd
->reg_rules
[i
];
627 if (!is_valid_reg_rule(reg_rule
))
634 static bool reg_does_bw_fit(const struct ieee80211_freq_range
*freq_range
,
635 u32 center_freq_khz
, u32 bw_khz
)
637 u32 start_freq_khz
, end_freq_khz
;
639 start_freq_khz
= center_freq_khz
- (bw_khz
/2);
640 end_freq_khz
= center_freq_khz
+ (bw_khz
/2);
642 if (start_freq_khz
>= freq_range
->start_freq_khz
&&
643 end_freq_khz
<= freq_range
->end_freq_khz
)
650 * freq_in_rule_band - tells us if a frequency is in a frequency band
651 * @freq_range: frequency rule we want to query
652 * @freq_khz: frequency we are inquiring about
654 * This lets us know if a specific frequency rule is or is not relevant to
655 * a specific frequency's band. Bands are device specific and artificial
656 * definitions (the "2.4 GHz band", the "5 GHz band" and the "60GHz band"),
657 * however it is safe for now to assume that a frequency rule should not be
658 * part of a frequency's band if the start freq or end freq are off by more
659 * than 2 GHz for the 2.4 and 5 GHz bands, and by more than 10 GHz for the
661 * This resolution can be lowered and should be considered as we add
662 * regulatory rule support for other "bands".
664 static bool freq_in_rule_band(const struct ieee80211_freq_range
*freq_range
,
667 #define ONE_GHZ_IN_KHZ 1000000
669 * From 802.11ad: directional multi-gigabit (DMG):
670 * Pertaining to operation in a frequency band containing a channel
671 * with the Channel starting frequency above 45 GHz.
673 u32 limit
= freq_khz
> 45 * ONE_GHZ_IN_KHZ
?
674 10 * ONE_GHZ_IN_KHZ
: 2 * ONE_GHZ_IN_KHZ
;
675 if (abs(freq_khz
- freq_range
->start_freq_khz
) <= limit
)
677 if (abs(freq_khz
- freq_range
->end_freq_khz
) <= limit
)
680 #undef ONE_GHZ_IN_KHZ
684 * Later on we can perhaps use the more restrictive DFS
685 * region but we don't have information for that yet so
686 * for now simply disallow conflicts.
688 static enum nl80211_dfs_regions
689 reg_intersect_dfs_region(const enum nl80211_dfs_regions dfs_region1
,
690 const enum nl80211_dfs_regions dfs_region2
)
692 if (dfs_region1
!= dfs_region2
)
693 return NL80211_DFS_UNSET
;
698 * Helper for regdom_intersect(), this does the real
699 * mathematical intersection fun
701 static int reg_rules_intersect(const struct ieee80211_regdomain
*rd1
,
702 const struct ieee80211_regdomain
*rd2
,
703 const struct ieee80211_reg_rule
*rule1
,
704 const struct ieee80211_reg_rule
*rule2
,
705 struct ieee80211_reg_rule
*intersected_rule
)
707 const struct ieee80211_freq_range
*freq_range1
, *freq_range2
;
708 struct ieee80211_freq_range
*freq_range
;
709 const struct ieee80211_power_rule
*power_rule1
, *power_rule2
;
710 struct ieee80211_power_rule
*power_rule
;
711 u32 freq_diff
, max_bandwidth1
, max_bandwidth2
;
713 freq_range1
= &rule1
->freq_range
;
714 freq_range2
= &rule2
->freq_range
;
715 freq_range
= &intersected_rule
->freq_range
;
717 power_rule1
= &rule1
->power_rule
;
718 power_rule2
= &rule2
->power_rule
;
719 power_rule
= &intersected_rule
->power_rule
;
721 freq_range
->start_freq_khz
= max(freq_range1
->start_freq_khz
,
722 freq_range2
->start_freq_khz
);
723 freq_range
->end_freq_khz
= min(freq_range1
->end_freq_khz
,
724 freq_range2
->end_freq_khz
);
726 max_bandwidth1
= freq_range1
->max_bandwidth_khz
;
727 max_bandwidth2
= freq_range2
->max_bandwidth_khz
;
729 if (rule1
->flags
& NL80211_RRF_AUTO_BW
)
730 max_bandwidth1
= reg_get_max_bandwidth(rd1
, rule1
);
731 if (rule2
->flags
& NL80211_RRF_AUTO_BW
)
732 max_bandwidth2
= reg_get_max_bandwidth(rd2
, rule2
);
734 freq_range
->max_bandwidth_khz
= min(max_bandwidth1
, max_bandwidth2
);
736 intersected_rule
->flags
= rule1
->flags
| rule2
->flags
;
739 * In case NL80211_RRF_AUTO_BW requested for both rules
740 * set AUTO_BW in intersected rule also. Next we will
741 * calculate BW correctly in handle_channel function.
742 * In other case remove AUTO_BW flag while we calculate
743 * maximum bandwidth correctly and auto calculation is
746 if ((rule1
->flags
& NL80211_RRF_AUTO_BW
) &&
747 (rule2
->flags
& NL80211_RRF_AUTO_BW
))
748 intersected_rule
->flags
|= NL80211_RRF_AUTO_BW
;
750 intersected_rule
->flags
&= ~NL80211_RRF_AUTO_BW
;
752 freq_diff
= freq_range
->end_freq_khz
- freq_range
->start_freq_khz
;
753 if (freq_range
->max_bandwidth_khz
> freq_diff
)
754 freq_range
->max_bandwidth_khz
= freq_diff
;
756 power_rule
->max_eirp
= min(power_rule1
->max_eirp
,
757 power_rule2
->max_eirp
);
758 power_rule
->max_antenna_gain
= min(power_rule1
->max_antenna_gain
,
759 power_rule2
->max_antenna_gain
);
761 intersected_rule
->dfs_cac_ms
= max(rule1
->dfs_cac_ms
,
764 if (!is_valid_reg_rule(intersected_rule
))
771 * regdom_intersect - do the intersection between two regulatory domains
772 * @rd1: first regulatory domain
773 * @rd2: second regulatory domain
775 * Use this function to get the intersection between two regulatory domains.
776 * Once completed we will mark the alpha2 for the rd as intersected, "98",
777 * as no one single alpha2 can represent this regulatory domain.
779 * Returns a pointer to the regulatory domain structure which will hold the
780 * resulting intersection of rules between rd1 and rd2. We will
781 * kzalloc() this structure for you.
783 static struct ieee80211_regdomain
*
784 regdom_intersect(const struct ieee80211_regdomain
*rd1
,
785 const struct ieee80211_regdomain
*rd2
)
789 unsigned int num_rules
= 0, rule_idx
= 0;
790 const struct ieee80211_reg_rule
*rule1
, *rule2
;
791 struct ieee80211_reg_rule
*intersected_rule
;
792 struct ieee80211_regdomain
*rd
;
793 /* This is just a dummy holder to help us count */
794 struct ieee80211_reg_rule dummy_rule
;
800 * First we get a count of the rules we'll need, then we actually
801 * build them. This is to so we can malloc() and free() a
802 * regdomain once. The reason we use reg_rules_intersect() here
803 * is it will return -EINVAL if the rule computed makes no sense.
804 * All rules that do check out OK are valid.
807 for (x
= 0; x
< rd1
->n_reg_rules
; x
++) {
808 rule1
= &rd1
->reg_rules
[x
];
809 for (y
= 0; y
< rd2
->n_reg_rules
; y
++) {
810 rule2
= &rd2
->reg_rules
[y
];
811 if (!reg_rules_intersect(rd1
, rd2
, rule1
, rule2
,
820 size_of_regd
= sizeof(struct ieee80211_regdomain
) +
821 num_rules
* sizeof(struct ieee80211_reg_rule
);
823 rd
= kzalloc(size_of_regd
, GFP_KERNEL
);
827 for (x
= 0; x
< rd1
->n_reg_rules
&& rule_idx
< num_rules
; x
++) {
828 rule1
= &rd1
->reg_rules
[x
];
829 for (y
= 0; y
< rd2
->n_reg_rules
&& rule_idx
< num_rules
; y
++) {
830 rule2
= &rd2
->reg_rules
[y
];
832 * This time around instead of using the stack lets
833 * write to the target rule directly saving ourselves
836 intersected_rule
= &rd
->reg_rules
[rule_idx
];
837 r
= reg_rules_intersect(rd1
, rd2
, rule1
, rule2
,
840 * No need to memset here the intersected rule here as
841 * we're not using the stack anymore
849 if (rule_idx
!= num_rules
) {
854 rd
->n_reg_rules
= num_rules
;
857 rd
->dfs_region
= reg_intersect_dfs_region(rd1
->dfs_region
,
864 * XXX: add support for the rest of enum nl80211_reg_rule_flags, we may
865 * want to just have the channel structure use these
867 static u32
map_regdom_flags(u32 rd_flags
)
869 u32 channel_flags
= 0;
870 if (rd_flags
& NL80211_RRF_NO_IR_ALL
)
871 channel_flags
|= IEEE80211_CHAN_NO_IR
;
872 if (rd_flags
& NL80211_RRF_DFS
)
873 channel_flags
|= IEEE80211_CHAN_RADAR
;
874 if (rd_flags
& NL80211_RRF_NO_OFDM
)
875 channel_flags
|= IEEE80211_CHAN_NO_OFDM
;
876 if (rd_flags
& NL80211_RRF_NO_OUTDOOR
)
877 channel_flags
|= IEEE80211_CHAN_INDOOR_ONLY
;
878 return channel_flags
;
881 static const struct ieee80211_reg_rule
*
882 freq_reg_info_regd(struct wiphy
*wiphy
, u32 center_freq
,
883 const struct ieee80211_regdomain
*regd
)
886 bool band_rule_found
= false;
887 bool bw_fits
= false;
890 return ERR_PTR(-EINVAL
);
892 for (i
= 0; i
< regd
->n_reg_rules
; i
++) {
893 const struct ieee80211_reg_rule
*rr
;
894 const struct ieee80211_freq_range
*fr
= NULL
;
896 rr
= ®d
->reg_rules
[i
];
897 fr
= &rr
->freq_range
;
900 * We only need to know if one frequency rule was
901 * was in center_freq's band, that's enough, so lets
902 * not overwrite it once found
904 if (!band_rule_found
)
905 band_rule_found
= freq_in_rule_band(fr
, center_freq
);
907 bw_fits
= reg_does_bw_fit(fr
, center_freq
, MHZ_TO_KHZ(20));
909 if (band_rule_found
&& bw_fits
)
913 if (!band_rule_found
)
914 return ERR_PTR(-ERANGE
);
916 return ERR_PTR(-EINVAL
);
919 const struct ieee80211_reg_rule
*freq_reg_info(struct wiphy
*wiphy
,
922 const struct ieee80211_regdomain
*regd
;
924 regd
= reg_get_regdomain(wiphy
);
926 return freq_reg_info_regd(wiphy
, center_freq
, regd
);
928 EXPORT_SYMBOL(freq_reg_info
);
930 const char *reg_initiator_name(enum nl80211_reg_initiator initiator
)
933 case NL80211_REGDOM_SET_BY_CORE
:
935 case NL80211_REGDOM_SET_BY_USER
:
937 case NL80211_REGDOM_SET_BY_DRIVER
:
939 case NL80211_REGDOM_SET_BY_COUNTRY_IE
:
946 EXPORT_SYMBOL(reg_initiator_name
);
948 #ifdef CONFIG_CFG80211_REG_DEBUG
949 static void chan_reg_rule_print_dbg(const struct ieee80211_regdomain
*regd
,
950 struct ieee80211_channel
*chan
,
951 const struct ieee80211_reg_rule
*reg_rule
)
953 const struct ieee80211_power_rule
*power_rule
;
954 const struct ieee80211_freq_range
*freq_range
;
955 char max_antenna_gain
[32], bw
[32];
957 power_rule
= ®_rule
->power_rule
;
958 freq_range
= ®_rule
->freq_range
;
960 if (!power_rule
->max_antenna_gain
)
961 snprintf(max_antenna_gain
, sizeof(max_antenna_gain
), "N/A");
963 snprintf(max_antenna_gain
, sizeof(max_antenna_gain
), "%d",
964 power_rule
->max_antenna_gain
);
966 if (reg_rule
->flags
& NL80211_RRF_AUTO_BW
)
967 snprintf(bw
, sizeof(bw
), "%d KHz, %d KHz AUTO",
968 freq_range
->max_bandwidth_khz
,
969 reg_get_max_bandwidth(regd
, reg_rule
));
971 snprintf(bw
, sizeof(bw
), "%d KHz",
972 freq_range
->max_bandwidth_khz
);
974 REG_DBG_PRINT("Updating information on frequency %d MHz with regulatory rule:\n",
977 REG_DBG_PRINT("%d KHz - %d KHz @ %s), (%s mBi, %d mBm)\n",
978 freq_range
->start_freq_khz
, freq_range
->end_freq_khz
,
979 bw
, max_antenna_gain
,
980 power_rule
->max_eirp
);
983 static void chan_reg_rule_print_dbg(const struct ieee80211_regdomain
*regd
,
984 struct ieee80211_channel
*chan
,
985 const struct ieee80211_reg_rule
*reg_rule
)
992 * Note that right now we assume the desired channel bandwidth
993 * is always 20 MHz for each individual channel (HT40 uses 20 MHz
994 * per channel, the primary and the extension channel).
996 static void handle_channel(struct wiphy
*wiphy
,
997 enum nl80211_reg_initiator initiator
,
998 struct ieee80211_channel
*chan
)
1000 u32 flags
, bw_flags
= 0;
1001 const struct ieee80211_reg_rule
*reg_rule
= NULL
;
1002 const struct ieee80211_power_rule
*power_rule
= NULL
;
1003 const struct ieee80211_freq_range
*freq_range
= NULL
;
1004 struct wiphy
*request_wiphy
= NULL
;
1005 struct regulatory_request
*lr
= get_last_request();
1006 const struct ieee80211_regdomain
*regd
;
1007 u32 max_bandwidth_khz
;
1009 request_wiphy
= wiphy_idx_to_wiphy(lr
->wiphy_idx
);
1011 flags
= chan
->orig_flags
;
1013 reg_rule
= freq_reg_info(wiphy
, MHZ_TO_KHZ(chan
->center_freq
));
1014 if (IS_ERR(reg_rule
)) {
1016 * We will disable all channels that do not match our
1017 * received regulatory rule unless the hint is coming
1018 * from a Country IE and the Country IE had no information
1019 * about a band. The IEEE 802.11 spec allows for an AP
1020 * to send only a subset of the regulatory rules allowed,
1021 * so an AP in the US that only supports 2.4 GHz may only send
1022 * a country IE with information for the 2.4 GHz band
1023 * while 5 GHz is still supported.
1025 if (initiator
== NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
1026 PTR_ERR(reg_rule
) == -ERANGE
)
1029 if (lr
->initiator
== NL80211_REGDOM_SET_BY_DRIVER
&&
1030 request_wiphy
&& request_wiphy
== wiphy
&&
1031 request_wiphy
->regulatory_flags
& REGULATORY_STRICT_REG
) {
1032 REG_DBG_PRINT("Disabling freq %d MHz for good\n",
1034 chan
->orig_flags
|= IEEE80211_CHAN_DISABLED
;
1035 chan
->flags
= chan
->orig_flags
;
1037 REG_DBG_PRINT("Disabling freq %d MHz\n",
1039 chan
->flags
|= IEEE80211_CHAN_DISABLED
;
1044 regd
= reg_get_regdomain(wiphy
);
1045 chan_reg_rule_print_dbg(regd
, chan
, reg_rule
);
1047 power_rule
= ®_rule
->power_rule
;
1048 freq_range
= ®_rule
->freq_range
;
1050 max_bandwidth_khz
= freq_range
->max_bandwidth_khz
;
1051 /* Check if auto calculation requested */
1052 if (reg_rule
->flags
& NL80211_RRF_AUTO_BW
)
1053 max_bandwidth_khz
= reg_get_max_bandwidth(regd
, reg_rule
);
1055 if (max_bandwidth_khz
< MHZ_TO_KHZ(40))
1056 bw_flags
= IEEE80211_CHAN_NO_HT40
;
1057 if (max_bandwidth_khz
< MHZ_TO_KHZ(80))
1058 bw_flags
|= IEEE80211_CHAN_NO_80MHZ
;
1059 if (max_bandwidth_khz
< MHZ_TO_KHZ(160))
1060 bw_flags
|= IEEE80211_CHAN_NO_160MHZ
;
1062 if (lr
->initiator
== NL80211_REGDOM_SET_BY_DRIVER
&&
1063 request_wiphy
&& request_wiphy
== wiphy
&&
1064 request_wiphy
->regulatory_flags
& REGULATORY_STRICT_REG
) {
1066 * This guarantees the driver's requested regulatory domain
1067 * will always be used as a base for further regulatory
1070 chan
->flags
= chan
->orig_flags
=
1071 map_regdom_flags(reg_rule
->flags
) | bw_flags
;
1072 chan
->max_antenna_gain
= chan
->orig_mag
=
1073 (int) MBI_TO_DBI(power_rule
->max_antenna_gain
);
1074 chan
->max_reg_power
= chan
->max_power
= chan
->orig_mpwr
=
1075 (int) MBM_TO_DBM(power_rule
->max_eirp
);
1079 chan
->dfs_state
= NL80211_DFS_USABLE
;
1080 chan
->dfs_state_entered
= jiffies
;
1082 chan
->beacon_found
= false;
1083 chan
->flags
= flags
| bw_flags
| map_regdom_flags(reg_rule
->flags
);
1084 chan
->max_antenna_gain
=
1085 min_t(int, chan
->orig_mag
,
1086 MBI_TO_DBI(power_rule
->max_antenna_gain
));
1087 chan
->max_reg_power
= (int) MBM_TO_DBM(power_rule
->max_eirp
);
1089 if (chan
->flags
& IEEE80211_CHAN_RADAR
) {
1090 if (reg_rule
->dfs_cac_ms
)
1091 chan
->dfs_cac_ms
= reg_rule
->dfs_cac_ms
;
1093 chan
->dfs_cac_ms
= IEEE80211_DFS_MIN_CAC_TIME_MS
;
1096 if (chan
->orig_mpwr
) {
1098 * Devices that use REGULATORY_COUNTRY_IE_FOLLOW_POWER
1099 * will always follow the passed country IE power settings.
1101 if (initiator
== NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
1102 wiphy
->regulatory_flags
& REGULATORY_COUNTRY_IE_FOLLOW_POWER
)
1103 chan
->max_power
= chan
->max_reg_power
;
1105 chan
->max_power
= min(chan
->orig_mpwr
,
1106 chan
->max_reg_power
);
1108 chan
->max_power
= chan
->max_reg_power
;
1111 static void handle_band(struct wiphy
*wiphy
,
1112 enum nl80211_reg_initiator initiator
,
1113 struct ieee80211_supported_band
*sband
)
1120 for (i
= 0; i
< sband
->n_channels
; i
++)
1121 handle_channel(wiphy
, initiator
, &sband
->channels
[i
]);
1124 static bool reg_request_cell_base(struct regulatory_request
*request
)
1126 if (request
->initiator
!= NL80211_REGDOM_SET_BY_USER
)
1128 return request
->user_reg_hint_type
== NL80211_USER_REG_HINT_CELL_BASE
;
1131 bool reg_last_request_cell_base(void)
1133 return reg_request_cell_base(get_last_request());
1136 #ifdef CONFIG_CFG80211_CERTIFICATION_ONUS
1137 /* Core specific check */
1138 static enum reg_request_treatment
1139 reg_ignore_cell_hint(struct regulatory_request
*pending_request
)
1141 struct regulatory_request
*lr
= get_last_request();
1143 if (!reg_num_devs_support_basehint
)
1144 return REG_REQ_IGNORE
;
1146 if (reg_request_cell_base(lr
) &&
1147 !regdom_changes(pending_request
->alpha2
))
1148 return REG_REQ_ALREADY_SET
;
1153 /* Device specific check */
1154 static bool reg_dev_ignore_cell_hint(struct wiphy
*wiphy
)
1156 return !(wiphy
->features
& NL80211_FEATURE_CELL_BASE_REG_HINTS
);
1159 static int reg_ignore_cell_hint(struct regulatory_request
*pending_request
)
1161 return REG_REQ_IGNORE
;
1164 static bool reg_dev_ignore_cell_hint(struct wiphy
*wiphy
)
1170 static bool wiphy_strict_alpha2_regd(struct wiphy
*wiphy
)
1172 if (wiphy
->regulatory_flags
& REGULATORY_STRICT_REG
&&
1173 !(wiphy
->regulatory_flags
& REGULATORY_CUSTOM_REG
))
1178 static bool ignore_reg_update(struct wiphy
*wiphy
,
1179 enum nl80211_reg_initiator initiator
)
1181 struct regulatory_request
*lr
= get_last_request();
1184 REG_DBG_PRINT("Ignoring regulatory request set by %s "
1185 "since last_request is not set\n",
1186 reg_initiator_name(initiator
));
1190 if (initiator
== NL80211_REGDOM_SET_BY_CORE
&&
1191 wiphy
->regulatory_flags
& REGULATORY_CUSTOM_REG
) {
1192 REG_DBG_PRINT("Ignoring regulatory request set by %s "
1193 "since the driver uses its own custom "
1194 "regulatory domain\n",
1195 reg_initiator_name(initiator
));
1200 * wiphy->regd will be set once the device has its own
1201 * desired regulatory domain set
1203 if (wiphy_strict_alpha2_regd(wiphy
) && !wiphy
->regd
&&
1204 initiator
!= NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
1205 !is_world_regdom(lr
->alpha2
)) {
1206 REG_DBG_PRINT("Ignoring regulatory request set by %s "
1207 "since the driver requires its own regulatory "
1208 "domain to be set first\n",
1209 reg_initiator_name(initiator
));
1213 if (reg_request_cell_base(lr
))
1214 return reg_dev_ignore_cell_hint(wiphy
);
1219 static bool reg_is_world_roaming(struct wiphy
*wiphy
)
1221 const struct ieee80211_regdomain
*cr
= get_cfg80211_regdom();
1222 const struct ieee80211_regdomain
*wr
= get_wiphy_regdom(wiphy
);
1223 struct regulatory_request
*lr
= get_last_request();
1225 if (is_world_regdom(cr
->alpha2
) || (wr
&& is_world_regdom(wr
->alpha2
)))
1228 if (lr
&& lr
->initiator
!= NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
1229 wiphy
->regulatory_flags
& REGULATORY_CUSTOM_REG
)
1235 static void handle_reg_beacon(struct wiphy
*wiphy
, unsigned int chan_idx
,
1236 struct reg_beacon
*reg_beacon
)
1238 struct ieee80211_supported_band
*sband
;
1239 struct ieee80211_channel
*chan
;
1240 bool channel_changed
= false;
1241 struct ieee80211_channel chan_before
;
1243 sband
= wiphy
->bands
[reg_beacon
->chan
.band
];
1244 chan
= &sband
->channels
[chan_idx
];
1246 if (likely(chan
->center_freq
!= reg_beacon
->chan
.center_freq
))
1249 if (chan
->beacon_found
)
1252 chan
->beacon_found
= true;
1254 if (!reg_is_world_roaming(wiphy
))
1257 if (wiphy
->regulatory_flags
& REGULATORY_DISABLE_BEACON_HINTS
)
1260 chan_before
.center_freq
= chan
->center_freq
;
1261 chan_before
.flags
= chan
->flags
;
1263 if (chan
->flags
& IEEE80211_CHAN_NO_IR
) {
1264 chan
->flags
&= ~IEEE80211_CHAN_NO_IR
;
1265 channel_changed
= true;
1268 if (channel_changed
)
1269 nl80211_send_beacon_hint_event(wiphy
, &chan_before
, chan
);
1273 * Called when a scan on a wiphy finds a beacon on
1276 static void wiphy_update_new_beacon(struct wiphy
*wiphy
,
1277 struct reg_beacon
*reg_beacon
)
1280 struct ieee80211_supported_band
*sband
;
1282 if (!wiphy
->bands
[reg_beacon
->chan
.band
])
1285 sband
= wiphy
->bands
[reg_beacon
->chan
.band
];
1287 for (i
= 0; i
< sband
->n_channels
; i
++)
1288 handle_reg_beacon(wiphy
, i
, reg_beacon
);
1292 * Called upon reg changes or a new wiphy is added
1294 static void wiphy_update_beacon_reg(struct wiphy
*wiphy
)
1297 struct ieee80211_supported_band
*sband
;
1298 struct reg_beacon
*reg_beacon
;
1300 list_for_each_entry(reg_beacon
, ®_beacon_list
, list
) {
1301 if (!wiphy
->bands
[reg_beacon
->chan
.band
])
1303 sband
= wiphy
->bands
[reg_beacon
->chan
.band
];
1304 for (i
= 0; i
< sband
->n_channels
; i
++)
1305 handle_reg_beacon(wiphy
, i
, reg_beacon
);
1309 /* Reap the advantages of previously found beacons */
1310 static void reg_process_beacons(struct wiphy
*wiphy
)
1313 * Means we are just firing up cfg80211, so no beacons would
1314 * have been processed yet.
1318 wiphy_update_beacon_reg(wiphy
);
1321 static bool is_ht40_allowed(struct ieee80211_channel
*chan
)
1325 if (chan
->flags
& IEEE80211_CHAN_DISABLED
)
1327 /* This would happen when regulatory rules disallow HT40 completely */
1328 if ((chan
->flags
& IEEE80211_CHAN_NO_HT40
) == IEEE80211_CHAN_NO_HT40
)
1333 static void reg_process_ht_flags_channel(struct wiphy
*wiphy
,
1334 struct ieee80211_channel
*channel
)
1336 struct ieee80211_supported_band
*sband
= wiphy
->bands
[channel
->band
];
1337 struct ieee80211_channel
*channel_before
= NULL
, *channel_after
= NULL
;
1340 if (!is_ht40_allowed(channel
)) {
1341 channel
->flags
|= IEEE80211_CHAN_NO_HT40
;
1346 * We need to ensure the extension channels exist to
1347 * be able to use HT40- or HT40+, this finds them (or not)
1349 for (i
= 0; i
< sband
->n_channels
; i
++) {
1350 struct ieee80211_channel
*c
= &sband
->channels
[i
];
1352 if (c
->center_freq
== (channel
->center_freq
- 20))
1354 if (c
->center_freq
== (channel
->center_freq
+ 20))
1359 * Please note that this assumes target bandwidth is 20 MHz,
1360 * if that ever changes we also need to change the below logic
1361 * to include that as well.
1363 if (!is_ht40_allowed(channel_before
))
1364 channel
->flags
|= IEEE80211_CHAN_NO_HT40MINUS
;
1366 channel
->flags
&= ~IEEE80211_CHAN_NO_HT40MINUS
;
1368 if (!is_ht40_allowed(channel_after
))
1369 channel
->flags
|= IEEE80211_CHAN_NO_HT40PLUS
;
1371 channel
->flags
&= ~IEEE80211_CHAN_NO_HT40PLUS
;
1374 static void reg_process_ht_flags_band(struct wiphy
*wiphy
,
1375 struct ieee80211_supported_band
*sband
)
1382 for (i
= 0; i
< sband
->n_channels
; i
++)
1383 reg_process_ht_flags_channel(wiphy
, &sband
->channels
[i
]);
1386 static void reg_process_ht_flags(struct wiphy
*wiphy
)
1388 enum ieee80211_band band
;
1393 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++)
1394 reg_process_ht_flags_band(wiphy
, wiphy
->bands
[band
]);
1397 static void reg_call_notifier(struct wiphy
*wiphy
,
1398 struct regulatory_request
*request
)
1400 if (wiphy
->reg_notifier
)
1401 wiphy
->reg_notifier(wiphy
, request
);
1404 static void wiphy_update_regulatory(struct wiphy
*wiphy
,
1405 enum nl80211_reg_initiator initiator
)
1407 enum ieee80211_band band
;
1408 struct regulatory_request
*lr
= get_last_request();
1410 if (ignore_reg_update(wiphy
, initiator
)) {
1412 * Regulatory updates set by CORE are ignored for custom
1413 * regulatory cards. Let us notify the changes to the driver,
1414 * as some drivers used this to restore its orig_* reg domain.
1416 if (initiator
== NL80211_REGDOM_SET_BY_CORE
&&
1417 wiphy
->regulatory_flags
& REGULATORY_CUSTOM_REG
)
1418 reg_call_notifier(wiphy
, lr
);
1422 lr
->dfs_region
= get_cfg80211_regdom()->dfs_region
;
1424 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++)
1425 handle_band(wiphy
, initiator
, wiphy
->bands
[band
]);
1427 reg_process_beacons(wiphy
);
1428 reg_process_ht_flags(wiphy
);
1429 reg_call_notifier(wiphy
, lr
);
1432 static void update_all_wiphy_regulatory(enum nl80211_reg_initiator initiator
)
1434 struct cfg80211_registered_device
*rdev
;
1435 struct wiphy
*wiphy
;
1439 list_for_each_entry(rdev
, &cfg80211_rdev_list
, list
) {
1440 wiphy
= &rdev
->wiphy
;
1441 wiphy_update_regulatory(wiphy
, initiator
);
1445 static void handle_channel_custom(struct wiphy
*wiphy
,
1446 struct ieee80211_channel
*chan
,
1447 const struct ieee80211_regdomain
*regd
)
1450 const struct ieee80211_reg_rule
*reg_rule
= NULL
;
1451 const struct ieee80211_power_rule
*power_rule
= NULL
;
1452 const struct ieee80211_freq_range
*freq_range
= NULL
;
1453 u32 max_bandwidth_khz
;
1455 reg_rule
= freq_reg_info_regd(wiphy
, MHZ_TO_KHZ(chan
->center_freq
),
1458 if (IS_ERR(reg_rule
)) {
1459 REG_DBG_PRINT("Disabling freq %d MHz as custom regd has no rule that fits it\n",
1461 chan
->orig_flags
|= IEEE80211_CHAN_DISABLED
;
1462 chan
->flags
= chan
->orig_flags
;
1466 chan_reg_rule_print_dbg(regd
, chan
, reg_rule
);
1468 power_rule
= ®_rule
->power_rule
;
1469 freq_range
= ®_rule
->freq_range
;
1471 max_bandwidth_khz
= freq_range
->max_bandwidth_khz
;
1472 /* Check if auto calculation requested */
1473 if (reg_rule
->flags
& NL80211_RRF_AUTO_BW
)
1474 max_bandwidth_khz
= reg_get_max_bandwidth(regd
, reg_rule
);
1476 if (max_bandwidth_khz
< MHZ_TO_KHZ(40))
1477 bw_flags
= IEEE80211_CHAN_NO_HT40
;
1478 if (max_bandwidth_khz
< MHZ_TO_KHZ(80))
1479 bw_flags
|= IEEE80211_CHAN_NO_80MHZ
;
1480 if (max_bandwidth_khz
< MHZ_TO_KHZ(160))
1481 bw_flags
|= IEEE80211_CHAN_NO_160MHZ
;
1483 chan
->flags
|= map_regdom_flags(reg_rule
->flags
) | bw_flags
;
1484 chan
->max_antenna_gain
= (int) MBI_TO_DBI(power_rule
->max_antenna_gain
);
1485 chan
->max_reg_power
= chan
->max_power
=
1486 (int) MBM_TO_DBM(power_rule
->max_eirp
);
1489 static void handle_band_custom(struct wiphy
*wiphy
,
1490 struct ieee80211_supported_band
*sband
,
1491 const struct ieee80211_regdomain
*regd
)
1498 for (i
= 0; i
< sband
->n_channels
; i
++)
1499 handle_channel_custom(wiphy
, &sband
->channels
[i
], regd
);
1502 /* Used by drivers prior to wiphy registration */
1503 void wiphy_apply_custom_regulatory(struct wiphy
*wiphy
,
1504 const struct ieee80211_regdomain
*regd
)
1506 enum ieee80211_band band
;
1507 unsigned int bands_set
= 0;
1509 WARN(!(wiphy
->regulatory_flags
& REGULATORY_CUSTOM_REG
),
1510 "wiphy should have REGULATORY_CUSTOM_REG\n");
1511 wiphy
->regulatory_flags
|= REGULATORY_CUSTOM_REG
;
1513 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++) {
1514 if (!wiphy
->bands
[band
])
1516 handle_band_custom(wiphy
, wiphy
->bands
[band
], regd
);
1521 * no point in calling this if it won't have any effect
1522 * on your device's supported bands.
1524 WARN_ON(!bands_set
);
1526 EXPORT_SYMBOL(wiphy_apply_custom_regulatory
);
1528 static void reg_set_request_processed(void)
1530 bool need_more_processing
= false;
1531 struct regulatory_request
*lr
= get_last_request();
1533 lr
->processed
= true;
1535 spin_lock(®_requests_lock
);
1536 if (!list_empty(®_requests_list
))
1537 need_more_processing
= true;
1538 spin_unlock(®_requests_lock
);
1540 if (lr
->initiator
== NL80211_REGDOM_SET_BY_USER
)
1541 cancel_delayed_work(®_timeout
);
1543 if (need_more_processing
)
1544 schedule_work(®_work
);
1548 * reg_process_hint_core - process core regulatory requests
1549 * @pending_request: a pending core regulatory request
1551 * The wireless subsystem can use this function to process
1552 * a regulatory request issued by the regulatory core.
1554 * Returns one of the different reg request treatment values.
1556 static enum reg_request_treatment
1557 reg_process_hint_core(struct regulatory_request
*core_request
)
1560 core_request
->intersect
= false;
1561 core_request
->processed
= false;
1563 reg_update_last_request(core_request
);
1565 return reg_call_crda(core_request
);
1568 static enum reg_request_treatment
1569 __reg_process_hint_user(struct regulatory_request
*user_request
)
1571 struct regulatory_request
*lr
= get_last_request();
1573 if (reg_request_cell_base(user_request
))
1574 return reg_ignore_cell_hint(user_request
);
1576 if (reg_request_cell_base(lr
))
1577 return REG_REQ_IGNORE
;
1579 if (lr
->initiator
== NL80211_REGDOM_SET_BY_COUNTRY_IE
)
1580 return REG_REQ_INTERSECT
;
1582 * If the user knows better the user should set the regdom
1583 * to their country before the IE is picked up
1585 if (lr
->initiator
== NL80211_REGDOM_SET_BY_USER
&&
1587 return REG_REQ_IGNORE
;
1589 * Process user requests only after previous user/driver/core
1590 * requests have been processed
1592 if ((lr
->initiator
== NL80211_REGDOM_SET_BY_CORE
||
1593 lr
->initiator
== NL80211_REGDOM_SET_BY_DRIVER
||
1594 lr
->initiator
== NL80211_REGDOM_SET_BY_USER
) &&
1595 regdom_changes(lr
->alpha2
))
1596 return REG_REQ_IGNORE
;
1598 if (!regdom_changes(user_request
->alpha2
))
1599 return REG_REQ_ALREADY_SET
;
1605 * reg_process_hint_user - process user regulatory requests
1606 * @user_request: a pending user regulatory request
1608 * The wireless subsystem can use this function to process
1609 * a regulatory request initiated by userspace.
1611 * Returns one of the different reg request treatment values.
1613 static enum reg_request_treatment
1614 reg_process_hint_user(struct regulatory_request
*user_request
)
1616 enum reg_request_treatment treatment
;
1618 treatment
= __reg_process_hint_user(user_request
);
1619 if (treatment
== REG_REQ_IGNORE
||
1620 treatment
== REG_REQ_ALREADY_SET
) {
1621 kfree(user_request
);
1625 user_request
->intersect
= treatment
== REG_REQ_INTERSECT
;
1626 user_request
->processed
= false;
1628 reg_update_last_request(user_request
);
1630 user_alpha2
[0] = user_request
->alpha2
[0];
1631 user_alpha2
[1] = user_request
->alpha2
[1];
1633 return reg_call_crda(user_request
);
1636 static enum reg_request_treatment
1637 __reg_process_hint_driver(struct regulatory_request
*driver_request
)
1639 struct regulatory_request
*lr
= get_last_request();
1641 if (lr
->initiator
== NL80211_REGDOM_SET_BY_CORE
) {
1642 if (regdom_changes(driver_request
->alpha2
))
1644 return REG_REQ_ALREADY_SET
;
1648 * This would happen if you unplug and plug your card
1649 * back in or if you add a new device for which the previously
1650 * loaded card also agrees on the regulatory domain.
1652 if (lr
->initiator
== NL80211_REGDOM_SET_BY_DRIVER
&&
1653 !regdom_changes(driver_request
->alpha2
))
1654 return REG_REQ_ALREADY_SET
;
1656 return REG_REQ_INTERSECT
;
1660 * reg_process_hint_driver - process driver regulatory requests
1661 * @driver_request: a pending driver regulatory request
1663 * The wireless subsystem can use this function to process
1664 * a regulatory request issued by an 802.11 driver.
1666 * Returns one of the different reg request treatment values.
1668 static enum reg_request_treatment
1669 reg_process_hint_driver(struct wiphy
*wiphy
,
1670 struct regulatory_request
*driver_request
)
1672 const struct ieee80211_regdomain
*regd
;
1673 enum reg_request_treatment treatment
;
1675 treatment
= __reg_process_hint_driver(driver_request
);
1677 switch (treatment
) {
1680 case REG_REQ_IGNORE
:
1681 kfree(driver_request
);
1683 case REG_REQ_INTERSECT
:
1685 case REG_REQ_ALREADY_SET
:
1686 regd
= reg_copy_regd(get_cfg80211_regdom());
1688 kfree(driver_request
);
1689 return REG_REQ_IGNORE
;
1691 rcu_assign_pointer(wiphy
->regd
, regd
);
1695 driver_request
->intersect
= treatment
== REG_REQ_INTERSECT
;
1696 driver_request
->processed
= false;
1698 reg_update_last_request(driver_request
);
1701 * Since CRDA will not be called in this case as we already
1702 * have applied the requested regulatory domain before we just
1703 * inform userspace we have processed the request
1705 if (treatment
== REG_REQ_ALREADY_SET
) {
1706 nl80211_send_reg_change_event(driver_request
);
1707 reg_set_request_processed();
1711 return reg_call_crda(driver_request
);
1714 static enum reg_request_treatment
1715 __reg_process_hint_country_ie(struct wiphy
*wiphy
,
1716 struct regulatory_request
*country_ie_request
)
1718 struct wiphy
*last_wiphy
= NULL
;
1719 struct regulatory_request
*lr
= get_last_request();
1721 if (reg_request_cell_base(lr
)) {
1722 /* Trust a Cell base station over the AP's country IE */
1723 if (regdom_changes(country_ie_request
->alpha2
))
1724 return REG_REQ_IGNORE
;
1725 return REG_REQ_ALREADY_SET
;
1727 if (wiphy
->regulatory_flags
& REGULATORY_COUNTRY_IE_IGNORE
)
1728 return REG_REQ_IGNORE
;
1731 if (unlikely(!is_an_alpha2(country_ie_request
->alpha2
)))
1734 if (lr
->initiator
!= NL80211_REGDOM_SET_BY_COUNTRY_IE
)
1737 last_wiphy
= wiphy_idx_to_wiphy(lr
->wiphy_idx
);
1739 if (last_wiphy
!= wiphy
) {
1741 * Two cards with two APs claiming different
1742 * Country IE alpha2s. We could
1743 * intersect them, but that seems unlikely
1744 * to be correct. Reject second one for now.
1746 if (regdom_changes(country_ie_request
->alpha2
))
1747 return REG_REQ_IGNORE
;
1748 return REG_REQ_ALREADY_SET
;
1751 * Two consecutive Country IE hints on the same wiphy.
1752 * This should be picked up early by the driver/stack
1754 if (WARN_ON(regdom_changes(country_ie_request
->alpha2
)))
1756 return REG_REQ_ALREADY_SET
;
1760 * reg_process_hint_country_ie - process regulatory requests from country IEs
1761 * @country_ie_request: a regulatory request from a country IE
1763 * The wireless subsystem can use this function to process
1764 * a regulatory request issued by a country Information Element.
1766 * Returns one of the different reg request treatment values.
1768 static enum reg_request_treatment
1769 reg_process_hint_country_ie(struct wiphy
*wiphy
,
1770 struct regulatory_request
*country_ie_request
)
1772 enum reg_request_treatment treatment
;
1774 treatment
= __reg_process_hint_country_ie(wiphy
, country_ie_request
);
1776 switch (treatment
) {
1779 case REG_REQ_IGNORE
:
1781 case REG_REQ_ALREADY_SET
:
1782 kfree(country_ie_request
);
1784 case REG_REQ_INTERSECT
:
1785 kfree(country_ie_request
);
1787 * This doesn't happen yet, not sure we
1788 * ever want to support it for this case.
1790 WARN_ONCE(1, "Unexpected intersection for country IEs");
1791 return REG_REQ_IGNORE
;
1794 country_ie_request
->intersect
= false;
1795 country_ie_request
->processed
= false;
1797 reg_update_last_request(country_ie_request
);
1799 return reg_call_crda(country_ie_request
);
1802 /* This processes *all* regulatory hints */
1803 static void reg_process_hint(struct regulatory_request
*reg_request
)
1805 struct wiphy
*wiphy
= NULL
;
1806 enum reg_request_treatment treatment
;
1808 if (reg_request
->wiphy_idx
!= WIPHY_IDX_INVALID
)
1809 wiphy
= wiphy_idx_to_wiphy(reg_request
->wiphy_idx
);
1811 switch (reg_request
->initiator
) {
1812 case NL80211_REGDOM_SET_BY_CORE
:
1813 reg_process_hint_core(reg_request
);
1815 case NL80211_REGDOM_SET_BY_USER
:
1816 treatment
= reg_process_hint_user(reg_request
);
1817 if (treatment
== REG_REQ_IGNORE
||
1818 treatment
== REG_REQ_ALREADY_SET
)
1820 queue_delayed_work(system_power_efficient_wq
,
1821 ®_timeout
, msecs_to_jiffies(3142));
1823 case NL80211_REGDOM_SET_BY_DRIVER
:
1826 treatment
= reg_process_hint_driver(wiphy
, reg_request
);
1828 case NL80211_REGDOM_SET_BY_COUNTRY_IE
:
1831 treatment
= reg_process_hint_country_ie(wiphy
, reg_request
);
1834 WARN(1, "invalid initiator %d\n", reg_request
->initiator
);
1838 /* This is required so that the orig_* parameters are saved */
1839 if (treatment
== REG_REQ_ALREADY_SET
&& wiphy
&&
1840 wiphy
->regulatory_flags
& REGULATORY_STRICT_REG
)
1841 wiphy_update_regulatory(wiphy
, reg_request
->initiator
);
1850 * Processes regulatory hints, this is all the NL80211_REGDOM_SET_BY_*
1851 * Regulatory hints come on a first come first serve basis and we
1852 * must process each one atomically.
1854 static void reg_process_pending_hints(void)
1856 struct regulatory_request
*reg_request
, *lr
;
1858 lr
= get_last_request();
1860 /* When last_request->processed becomes true this will be rescheduled */
1861 if (lr
&& !lr
->processed
) {
1862 REG_DBG_PRINT("Pending regulatory request, waiting for it to be processed...\n");
1866 spin_lock(®_requests_lock
);
1868 if (list_empty(®_requests_list
)) {
1869 spin_unlock(®_requests_lock
);
1873 reg_request
= list_first_entry(®_requests_list
,
1874 struct regulatory_request
,
1876 list_del_init(®_request
->list
);
1878 spin_unlock(®_requests_lock
);
1880 reg_process_hint(reg_request
);
1883 /* Processes beacon hints -- this has nothing to do with country IEs */
1884 static void reg_process_pending_beacon_hints(void)
1886 struct cfg80211_registered_device
*rdev
;
1887 struct reg_beacon
*pending_beacon
, *tmp
;
1889 /* This goes through the _pending_ beacon list */
1890 spin_lock_bh(®_pending_beacons_lock
);
1892 list_for_each_entry_safe(pending_beacon
, tmp
,
1893 ®_pending_beacons
, list
) {
1894 list_del_init(&pending_beacon
->list
);
1896 /* Applies the beacon hint to current wiphys */
1897 list_for_each_entry(rdev
, &cfg80211_rdev_list
, list
)
1898 wiphy_update_new_beacon(&rdev
->wiphy
, pending_beacon
);
1900 /* Remembers the beacon hint for new wiphys or reg changes */
1901 list_add_tail(&pending_beacon
->list
, ®_beacon_list
);
1904 spin_unlock_bh(®_pending_beacons_lock
);
1907 static void reg_todo(struct work_struct
*work
)
1910 reg_process_pending_hints();
1911 reg_process_pending_beacon_hints();
1915 static void queue_regulatory_request(struct regulatory_request
*request
)
1917 request
->alpha2
[0] = toupper(request
->alpha2
[0]);
1918 request
->alpha2
[1] = toupper(request
->alpha2
[1]);
1920 spin_lock(®_requests_lock
);
1921 list_add_tail(&request
->list
, ®_requests_list
);
1922 spin_unlock(®_requests_lock
);
1924 schedule_work(®_work
);
1928 * Core regulatory hint -- happens during cfg80211_init()
1929 * and when we restore regulatory settings.
1931 static int regulatory_hint_core(const char *alpha2
)
1933 struct regulatory_request
*request
;
1935 request
= kzalloc(sizeof(struct regulatory_request
), GFP_KERNEL
);
1939 request
->alpha2
[0] = alpha2
[0];
1940 request
->alpha2
[1] = alpha2
[1];
1941 request
->initiator
= NL80211_REGDOM_SET_BY_CORE
;
1943 queue_regulatory_request(request
);
1949 int regulatory_hint_user(const char *alpha2
,
1950 enum nl80211_user_reg_hint_type user_reg_hint_type
)
1952 struct regulatory_request
*request
;
1954 if (WARN_ON(!alpha2
))
1957 request
= kzalloc(sizeof(struct regulatory_request
), GFP_KERNEL
);
1961 request
->wiphy_idx
= WIPHY_IDX_INVALID
;
1962 request
->alpha2
[0] = alpha2
[0];
1963 request
->alpha2
[1] = alpha2
[1];
1964 request
->initiator
= NL80211_REGDOM_SET_BY_USER
;
1965 request
->user_reg_hint_type
= user_reg_hint_type
;
1967 queue_regulatory_request(request
);
1973 int regulatory_hint(struct wiphy
*wiphy
, const char *alpha2
)
1975 struct regulatory_request
*request
;
1977 if (WARN_ON(!alpha2
|| !wiphy
))
1980 wiphy
->regulatory_flags
&= ~REGULATORY_CUSTOM_REG
;
1982 request
= kzalloc(sizeof(struct regulatory_request
), GFP_KERNEL
);
1986 request
->wiphy_idx
= get_wiphy_idx(wiphy
);
1988 request
->alpha2
[0] = alpha2
[0];
1989 request
->alpha2
[1] = alpha2
[1];
1990 request
->initiator
= NL80211_REGDOM_SET_BY_DRIVER
;
1992 queue_regulatory_request(request
);
1996 EXPORT_SYMBOL(regulatory_hint
);
1998 void regulatory_hint_country_ie(struct wiphy
*wiphy
, enum ieee80211_band band
,
1999 const u8
*country_ie
, u8 country_ie_len
)
2002 enum environment_cap env
= ENVIRON_ANY
;
2003 struct regulatory_request
*request
= NULL
, *lr
;
2005 /* IE len must be evenly divisible by 2 */
2006 if (country_ie_len
& 0x01)
2009 if (country_ie_len
< IEEE80211_COUNTRY_IE_MIN_LEN
)
2012 request
= kzalloc(sizeof(*request
), GFP_KERNEL
);
2016 alpha2
[0] = country_ie
[0];
2017 alpha2
[1] = country_ie
[1];
2019 if (country_ie
[2] == 'I')
2020 env
= ENVIRON_INDOOR
;
2021 else if (country_ie
[2] == 'O')
2022 env
= ENVIRON_OUTDOOR
;
2025 lr
= get_last_request();
2031 * We will run this only upon a successful connection on cfg80211.
2032 * We leave conflict resolution to the workqueue, where can hold
2035 if (lr
->initiator
== NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
2036 lr
->wiphy_idx
!= WIPHY_IDX_INVALID
)
2039 request
->wiphy_idx
= get_wiphy_idx(wiphy
);
2040 request
->alpha2
[0] = alpha2
[0];
2041 request
->alpha2
[1] = alpha2
[1];
2042 request
->initiator
= NL80211_REGDOM_SET_BY_COUNTRY_IE
;
2043 request
->country_ie_env
= env
;
2045 queue_regulatory_request(request
);
2052 static void restore_alpha2(char *alpha2
, bool reset_user
)
2054 /* indicates there is no alpha2 to consider for restoration */
2058 /* The user setting has precedence over the module parameter */
2059 if (is_user_regdom_saved()) {
2060 /* Unless we're asked to ignore it and reset it */
2062 REG_DBG_PRINT("Restoring regulatory settings including user preference\n");
2063 user_alpha2
[0] = '9';
2064 user_alpha2
[1] = '7';
2067 * If we're ignoring user settings, we still need to
2068 * check the module parameter to ensure we put things
2069 * back as they were for a full restore.
2071 if (!is_world_regdom(ieee80211_regdom
)) {
2072 REG_DBG_PRINT("Keeping preference on module parameter ieee80211_regdom: %c%c\n",
2073 ieee80211_regdom
[0], ieee80211_regdom
[1]);
2074 alpha2
[0] = ieee80211_regdom
[0];
2075 alpha2
[1] = ieee80211_regdom
[1];
2078 REG_DBG_PRINT("Restoring regulatory settings while preserving user preference for: %c%c\n",
2079 user_alpha2
[0], user_alpha2
[1]);
2080 alpha2
[0] = user_alpha2
[0];
2081 alpha2
[1] = user_alpha2
[1];
2083 } else if (!is_world_regdom(ieee80211_regdom
)) {
2084 REG_DBG_PRINT("Keeping preference on module parameter ieee80211_regdom: %c%c\n",
2085 ieee80211_regdom
[0], ieee80211_regdom
[1]);
2086 alpha2
[0] = ieee80211_regdom
[0];
2087 alpha2
[1] = ieee80211_regdom
[1];
2089 REG_DBG_PRINT("Restoring regulatory settings\n");
2092 static void restore_custom_reg_settings(struct wiphy
*wiphy
)
2094 struct ieee80211_supported_band
*sband
;
2095 enum ieee80211_band band
;
2096 struct ieee80211_channel
*chan
;
2099 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++) {
2100 sband
= wiphy
->bands
[band
];
2103 for (i
= 0; i
< sband
->n_channels
; i
++) {
2104 chan
= &sband
->channels
[i
];
2105 chan
->flags
= chan
->orig_flags
;
2106 chan
->max_antenna_gain
= chan
->orig_mag
;
2107 chan
->max_power
= chan
->orig_mpwr
;
2108 chan
->beacon_found
= false;
2114 * Restoring regulatory settings involves ingoring any
2115 * possibly stale country IE information and user regulatory
2116 * settings if so desired, this includes any beacon hints
2117 * learned as we could have traveled outside to another country
2118 * after disconnection. To restore regulatory settings we do
2119 * exactly what we did at bootup:
2121 * - send a core regulatory hint
2122 * - send a user regulatory hint if applicable
2124 * Device drivers that send a regulatory hint for a specific country
2125 * keep their own regulatory domain on wiphy->regd so that does does
2126 * not need to be remembered.
2128 static void restore_regulatory_settings(bool reset_user
)
2131 char world_alpha2
[2];
2132 struct reg_beacon
*reg_beacon
, *btmp
;
2133 struct regulatory_request
*reg_request
, *tmp
;
2134 LIST_HEAD(tmp_reg_req_list
);
2135 struct cfg80211_registered_device
*rdev
;
2139 reset_regdomains(true, &world_regdom
);
2140 restore_alpha2(alpha2
, reset_user
);
2143 * If there's any pending requests we simply
2144 * stash them to a temporary pending queue and
2145 * add then after we've restored regulatory
2148 spin_lock(®_requests_lock
);
2149 list_for_each_entry_safe(reg_request
, tmp
, ®_requests_list
, list
) {
2150 if (reg_request
->initiator
!= NL80211_REGDOM_SET_BY_USER
)
2152 list_move_tail(®_request
->list
, &tmp_reg_req_list
);
2154 spin_unlock(®_requests_lock
);
2156 /* Clear beacon hints */
2157 spin_lock_bh(®_pending_beacons_lock
);
2158 list_for_each_entry_safe(reg_beacon
, btmp
, ®_pending_beacons
, list
) {
2159 list_del(®_beacon
->list
);
2162 spin_unlock_bh(®_pending_beacons_lock
);
2164 list_for_each_entry_safe(reg_beacon
, btmp
, ®_beacon_list
, list
) {
2165 list_del(®_beacon
->list
);
2169 /* First restore to the basic regulatory settings */
2170 world_alpha2
[0] = cfg80211_world_regdom
->alpha2
[0];
2171 world_alpha2
[1] = cfg80211_world_regdom
->alpha2
[1];
2173 list_for_each_entry(rdev
, &cfg80211_rdev_list
, list
) {
2174 if (rdev
->wiphy
.regulatory_flags
& REGULATORY_CUSTOM_REG
)
2175 restore_custom_reg_settings(&rdev
->wiphy
);
2178 regulatory_hint_core(world_alpha2
);
2181 * This restores the ieee80211_regdom module parameter
2182 * preference or the last user requested regulatory
2183 * settings, user regulatory settings takes precedence.
2185 if (is_an_alpha2(alpha2
))
2186 regulatory_hint_user(user_alpha2
, NL80211_USER_REG_HINT_USER
);
2188 spin_lock(®_requests_lock
);
2189 list_splice_tail_init(&tmp_reg_req_list
, ®_requests_list
);
2190 spin_unlock(®_requests_lock
);
2192 REG_DBG_PRINT("Kicking the queue\n");
2194 schedule_work(®_work
);
2197 void regulatory_hint_disconnect(void)
2199 REG_DBG_PRINT("All devices are disconnected, going to restore regulatory settings\n");
2200 restore_regulatory_settings(false);
2203 static bool freq_is_chan_12_13_14(u16 freq
)
2205 if (freq
== ieee80211_channel_to_frequency(12, IEEE80211_BAND_2GHZ
) ||
2206 freq
== ieee80211_channel_to_frequency(13, IEEE80211_BAND_2GHZ
) ||
2207 freq
== ieee80211_channel_to_frequency(14, IEEE80211_BAND_2GHZ
))
2212 static bool pending_reg_beacon(struct ieee80211_channel
*beacon_chan
)
2214 struct reg_beacon
*pending_beacon
;
2216 list_for_each_entry(pending_beacon
, ®_pending_beacons
, list
)
2217 if (beacon_chan
->center_freq
==
2218 pending_beacon
->chan
.center_freq
)
2223 int regulatory_hint_found_beacon(struct wiphy
*wiphy
,
2224 struct ieee80211_channel
*beacon_chan
,
2227 struct reg_beacon
*reg_beacon
;
2230 if (beacon_chan
->beacon_found
||
2231 beacon_chan
->flags
& IEEE80211_CHAN_RADAR
||
2232 (beacon_chan
->band
== IEEE80211_BAND_2GHZ
&&
2233 !freq_is_chan_12_13_14(beacon_chan
->center_freq
)))
2236 spin_lock_bh(®_pending_beacons_lock
);
2237 processing
= pending_reg_beacon(beacon_chan
);
2238 spin_unlock_bh(®_pending_beacons_lock
);
2243 reg_beacon
= kzalloc(sizeof(struct reg_beacon
), gfp
);
2247 REG_DBG_PRINT("Found new beacon on frequency: %d MHz (Ch %d) on %s\n",
2248 beacon_chan
->center_freq
,
2249 ieee80211_frequency_to_channel(beacon_chan
->center_freq
),
2252 memcpy(®_beacon
->chan
, beacon_chan
,
2253 sizeof(struct ieee80211_channel
));
2256 * Since we can be called from BH or and non-BH context
2257 * we must use spin_lock_bh()
2259 spin_lock_bh(®_pending_beacons_lock
);
2260 list_add_tail(®_beacon
->list
, ®_pending_beacons
);
2261 spin_unlock_bh(®_pending_beacons_lock
);
2263 schedule_work(®_work
);
2268 static void print_rd_rules(const struct ieee80211_regdomain
*rd
)
2271 const struct ieee80211_reg_rule
*reg_rule
= NULL
;
2272 const struct ieee80211_freq_range
*freq_range
= NULL
;
2273 const struct ieee80211_power_rule
*power_rule
= NULL
;
2274 char bw
[32], cac_time
[32];
2276 pr_info(" (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp), (dfs_cac_time)\n");
2278 for (i
= 0; i
< rd
->n_reg_rules
; i
++) {
2279 reg_rule
= &rd
->reg_rules
[i
];
2280 freq_range
= ®_rule
->freq_range
;
2281 power_rule
= ®_rule
->power_rule
;
2283 if (reg_rule
->flags
& NL80211_RRF_AUTO_BW
)
2284 snprintf(bw
, sizeof(bw
), "%d KHz, %d KHz AUTO",
2285 freq_range
->max_bandwidth_khz
,
2286 reg_get_max_bandwidth(rd
, reg_rule
));
2288 snprintf(bw
, sizeof(bw
), "%d KHz",
2289 freq_range
->max_bandwidth_khz
);
2291 if (reg_rule
->flags
& NL80211_RRF_DFS
)
2292 scnprintf(cac_time
, sizeof(cac_time
), "%u s",
2293 reg_rule
->dfs_cac_ms
/1000);
2295 scnprintf(cac_time
, sizeof(cac_time
), "N/A");
2299 * There may not be documentation for max antenna gain
2300 * in certain regions
2302 if (power_rule
->max_antenna_gain
)
2303 pr_info(" (%d KHz - %d KHz @ %s), (%d mBi, %d mBm), (%s)\n",
2304 freq_range
->start_freq_khz
,
2305 freq_range
->end_freq_khz
,
2307 power_rule
->max_antenna_gain
,
2308 power_rule
->max_eirp
,
2311 pr_info(" (%d KHz - %d KHz @ %s), (N/A, %d mBm), (%s)\n",
2312 freq_range
->start_freq_khz
,
2313 freq_range
->end_freq_khz
,
2315 power_rule
->max_eirp
,
2320 bool reg_supported_dfs_region(enum nl80211_dfs_regions dfs_region
)
2322 switch (dfs_region
) {
2323 case NL80211_DFS_UNSET
:
2324 case NL80211_DFS_FCC
:
2325 case NL80211_DFS_ETSI
:
2326 case NL80211_DFS_JP
:
2329 REG_DBG_PRINT("Ignoring uknown DFS master region: %d\n",
2335 static void print_regdomain(const struct ieee80211_regdomain
*rd
)
2337 struct regulatory_request
*lr
= get_last_request();
2339 if (is_intersected_alpha2(rd
->alpha2
)) {
2340 if (lr
->initiator
== NL80211_REGDOM_SET_BY_COUNTRY_IE
) {
2341 struct cfg80211_registered_device
*rdev
;
2342 rdev
= cfg80211_rdev_by_wiphy_idx(lr
->wiphy_idx
);
2344 pr_info("Current regulatory domain updated by AP to: %c%c\n",
2345 rdev
->country_ie_alpha2
[0],
2346 rdev
->country_ie_alpha2
[1]);
2348 pr_info("Current regulatory domain intersected:\n");
2350 pr_info("Current regulatory domain intersected:\n");
2351 } else if (is_world_regdom(rd
->alpha2
)) {
2352 pr_info("World regulatory domain updated:\n");
2354 if (is_unknown_alpha2(rd
->alpha2
))
2355 pr_info("Regulatory domain changed to driver built-in settings (unknown country)\n");
2357 if (reg_request_cell_base(lr
))
2358 pr_info("Regulatory domain changed to country: %c%c by Cell Station\n",
2359 rd
->alpha2
[0], rd
->alpha2
[1]);
2361 pr_info("Regulatory domain changed to country: %c%c\n",
2362 rd
->alpha2
[0], rd
->alpha2
[1]);
2366 pr_info(" DFS Master region: %s", reg_dfs_region_str(rd
->dfs_region
));
2370 static void print_regdomain_info(const struct ieee80211_regdomain
*rd
)
2372 pr_info("Regulatory domain: %c%c\n", rd
->alpha2
[0], rd
->alpha2
[1]);
2376 static int reg_set_rd_core(const struct ieee80211_regdomain
*rd
)
2378 if (!is_world_regdom(rd
->alpha2
))
2380 update_world_regdomain(rd
);
2384 static int reg_set_rd_user(const struct ieee80211_regdomain
*rd
,
2385 struct regulatory_request
*user_request
)
2387 const struct ieee80211_regdomain
*intersected_rd
= NULL
;
2389 if (!regdom_changes(rd
->alpha2
))
2392 if (!is_valid_rd(rd
)) {
2393 pr_err("Invalid regulatory domain detected:\n");
2394 print_regdomain_info(rd
);
2398 if (!user_request
->intersect
) {
2399 reset_regdomains(false, rd
);
2403 intersected_rd
= regdom_intersect(rd
, get_cfg80211_regdom());
2404 if (!intersected_rd
)
2409 reset_regdomains(false, intersected_rd
);
2414 static int reg_set_rd_driver(const struct ieee80211_regdomain
*rd
,
2415 struct regulatory_request
*driver_request
)
2417 const struct ieee80211_regdomain
*regd
;
2418 const struct ieee80211_regdomain
*intersected_rd
= NULL
;
2419 const struct ieee80211_regdomain
*tmp
;
2420 struct wiphy
*request_wiphy
;
2422 if (is_world_regdom(rd
->alpha2
))
2425 if (!regdom_changes(rd
->alpha2
))
2428 if (!is_valid_rd(rd
)) {
2429 pr_err("Invalid regulatory domain detected:\n");
2430 print_regdomain_info(rd
);
2434 request_wiphy
= wiphy_idx_to_wiphy(driver_request
->wiphy_idx
);
2435 if (!request_wiphy
) {
2436 queue_delayed_work(system_power_efficient_wq
,
2441 if (!driver_request
->intersect
) {
2442 if (request_wiphy
->regd
)
2445 regd
= reg_copy_regd(rd
);
2447 return PTR_ERR(regd
);
2449 rcu_assign_pointer(request_wiphy
->regd
, regd
);
2450 reset_regdomains(false, rd
);
2454 intersected_rd
= regdom_intersect(rd
, get_cfg80211_regdom());
2455 if (!intersected_rd
)
2459 * We can trash what CRDA provided now.
2460 * However if a driver requested this specific regulatory
2461 * domain we keep it for its private use
2463 tmp
= get_wiphy_regdom(request_wiphy
);
2464 rcu_assign_pointer(request_wiphy
->regd
, rd
);
2465 rcu_free_regdom(tmp
);
2469 reset_regdomains(false, intersected_rd
);
2474 static int reg_set_rd_country_ie(const struct ieee80211_regdomain
*rd
,
2475 struct regulatory_request
*country_ie_request
)
2477 struct wiphy
*request_wiphy
;
2479 if (!is_alpha2_set(rd
->alpha2
) && !is_an_alpha2(rd
->alpha2
) &&
2480 !is_unknown_alpha2(rd
->alpha2
))
2484 * Lets only bother proceeding on the same alpha2 if the current
2485 * rd is non static (it means CRDA was present and was used last)
2486 * and the pending request came in from a country IE
2489 if (!is_valid_rd(rd
)) {
2490 pr_err("Invalid regulatory domain detected:\n");
2491 print_regdomain_info(rd
);
2495 request_wiphy
= wiphy_idx_to_wiphy(country_ie_request
->wiphy_idx
);
2496 if (!request_wiphy
) {
2497 queue_delayed_work(system_power_efficient_wq
,
2502 if (country_ie_request
->intersect
)
2505 reset_regdomains(false, rd
);
2510 * Use this call to set the current regulatory domain. Conflicts with
2511 * multiple drivers can be ironed out later. Caller must've already
2512 * kmalloc'd the rd structure.
2514 int set_regdom(const struct ieee80211_regdomain
*rd
)
2516 struct regulatory_request
*lr
;
2517 bool user_reset
= false;
2520 if (!reg_is_valid_request(rd
->alpha2
)) {
2525 lr
= get_last_request();
2527 /* Note that this doesn't update the wiphys, this is done below */
2528 switch (lr
->initiator
) {
2529 case NL80211_REGDOM_SET_BY_CORE
:
2530 r
= reg_set_rd_core(rd
);
2532 case NL80211_REGDOM_SET_BY_USER
:
2533 r
= reg_set_rd_user(rd
, lr
);
2536 case NL80211_REGDOM_SET_BY_DRIVER
:
2537 r
= reg_set_rd_driver(rd
, lr
);
2539 case NL80211_REGDOM_SET_BY_COUNTRY_IE
:
2540 r
= reg_set_rd_country_ie(rd
, lr
);
2543 WARN(1, "invalid initiator %d\n", lr
->initiator
);
2550 reg_set_request_processed();
2553 /* Back to world regulatory in case of errors */
2554 restore_regulatory_settings(user_reset
);
2561 /* This would make this whole thing pointless */
2562 if (WARN_ON(!lr
->intersect
&& rd
!= get_cfg80211_regdom()))
2565 /* update all wiphys now with the new established regulatory domain */
2566 update_all_wiphy_regulatory(lr
->initiator
);
2568 print_regdomain(get_cfg80211_regdom());
2570 nl80211_send_reg_change_event(lr
);
2572 reg_set_request_processed();
2577 void wiphy_regulatory_register(struct wiphy
*wiphy
)
2579 struct regulatory_request
*lr
;
2581 if (!reg_dev_ignore_cell_hint(wiphy
))
2582 reg_num_devs_support_basehint
++;
2584 lr
= get_last_request();
2585 wiphy_update_regulatory(wiphy
, lr
->initiator
);
2588 void wiphy_regulatory_deregister(struct wiphy
*wiphy
)
2590 struct wiphy
*request_wiphy
= NULL
;
2591 struct regulatory_request
*lr
;
2593 lr
= get_last_request();
2595 if (!reg_dev_ignore_cell_hint(wiphy
))
2596 reg_num_devs_support_basehint
--;
2598 rcu_free_regdom(get_wiphy_regdom(wiphy
));
2599 RCU_INIT_POINTER(wiphy
->regd
, NULL
);
2602 request_wiphy
= wiphy_idx_to_wiphy(lr
->wiphy_idx
);
2604 if (!request_wiphy
|| request_wiphy
!= wiphy
)
2607 lr
->wiphy_idx
= WIPHY_IDX_INVALID
;
2608 lr
->country_ie_env
= ENVIRON_ANY
;
2611 static void reg_timeout_work(struct work_struct
*work
)
2613 REG_DBG_PRINT("Timeout while waiting for CRDA to reply, restoring regulatory settings\n");
2615 restore_regulatory_settings(true);
2619 int __init
regulatory_init(void)
2623 reg_pdev
= platform_device_register_simple("regulatory", 0, NULL
, 0);
2624 if (IS_ERR(reg_pdev
))
2625 return PTR_ERR(reg_pdev
);
2627 spin_lock_init(®_requests_lock
);
2628 spin_lock_init(®_pending_beacons_lock
);
2630 reg_regdb_size_check();
2632 rcu_assign_pointer(cfg80211_regdomain
, cfg80211_world_regdom
);
2634 user_alpha2
[0] = '9';
2635 user_alpha2
[1] = '7';
2637 /* We always try to get an update for the static regdomain */
2638 err
= regulatory_hint_core(cfg80211_world_regdom
->alpha2
);
2643 * N.B. kobject_uevent_env() can fail mainly for when we're out
2644 * memory which is handled and propagated appropriately above
2645 * but it can also fail during a netlink_broadcast() or during
2646 * early boot for call_usermodehelper(). For now treat these
2647 * errors as non-fatal.
2649 pr_err("kobject_uevent_env() was unable to call CRDA during init\n");
2653 * Finally, if the user set the module parameter treat it
2656 if (!is_world_regdom(ieee80211_regdom
))
2657 regulatory_hint_user(ieee80211_regdom
,
2658 NL80211_USER_REG_HINT_USER
);
2663 void regulatory_exit(void)
2665 struct regulatory_request
*reg_request
, *tmp
;
2666 struct reg_beacon
*reg_beacon
, *btmp
;
2668 cancel_work_sync(®_work
);
2669 cancel_delayed_work_sync(®_timeout
);
2671 /* Lock to suppress warnings */
2673 reset_regdomains(true, NULL
);
2676 dev_set_uevent_suppress(®_pdev
->dev
, true);
2678 platform_device_unregister(reg_pdev
);
2680 list_for_each_entry_safe(reg_beacon
, btmp
, ®_pending_beacons
, list
) {
2681 list_del(®_beacon
->list
);
2685 list_for_each_entry_safe(reg_beacon
, btmp
, ®_beacon_list
, list
) {
2686 list_del(®_beacon
->list
);
2690 list_for_each_entry_safe(reg_request
, tmp
, ®_requests_list
, list
) {
2691 list_del(®_request
->list
);