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>
62 #ifdef CONFIG_CFG80211_REG_DEBUG
63 #define REG_DBG_PRINT(format, args...) \
64 printk(KERN_DEBUG pr_fmt(format), ##args)
66 #define REG_DBG_PRINT(args...)
70 * enum reg_request_treatment - regulatory request treatment
72 * @REG_REQ_OK: continue processing the regulatory request
73 * @REG_REQ_IGNORE: ignore the regulatory request
74 * @REG_REQ_INTERSECT: the regulatory domain resulting from this request should
75 * be intersected with the current one.
76 * @REG_REQ_ALREADY_SET: the regulatory request will not change the current
77 * regulatory settings, and no further processing is required.
78 * @REG_REQ_USER_HINT_HANDLED: a non alpha2 user hint was handled and no
79 * further processing is required, i.e., not need to update last_request
80 * etc. This should be used for user hints that do not provide an alpha2
81 * but some other type of regulatory hint, i.e., indoor operation.
83 enum reg_request_treatment
{
88 REG_REQ_USER_HINT_HANDLED
,
91 static struct regulatory_request core_request_world
= {
92 .initiator
= NL80211_REGDOM_SET_BY_CORE
,
97 .country_ie_env
= ENVIRON_ANY
,
101 * Receipt of information from last regulatory request,
102 * protected by RTNL (and can be accessed with RCU protection)
104 static struct regulatory_request __rcu
*last_request
=
105 (void __rcu
*)&core_request_world
;
107 /* To trigger userspace events */
108 static struct platform_device
*reg_pdev
;
111 * Central wireless core regulatory domains, we only need two,
112 * the current one and a world regulatory domain in case we have no
113 * information to give us an alpha2.
114 * (protected by RTNL, can be read under RCU)
116 const struct ieee80211_regdomain __rcu
*cfg80211_regdomain
;
119 * Number of devices that registered to the core
120 * that support cellular base station regulatory hints
121 * (protected by RTNL)
123 static int reg_num_devs_support_basehint
;
126 * State variable indicating if the platform on which the devices
127 * are attached is operating in an indoor environment. The state variable
128 * is relevant for all registered devices.
129 * (protected by RTNL)
131 static bool reg_is_indoor
;
133 static const struct ieee80211_regdomain
*get_cfg80211_regdom(void)
135 return rtnl_dereference(cfg80211_regdomain
);
138 static const struct ieee80211_regdomain
*get_wiphy_regdom(struct wiphy
*wiphy
)
140 return rtnl_dereference(wiphy
->regd
);
143 static const char *reg_dfs_region_str(enum nl80211_dfs_regions dfs_region
)
145 switch (dfs_region
) {
146 case NL80211_DFS_UNSET
:
148 case NL80211_DFS_FCC
:
150 case NL80211_DFS_ETSI
:
158 enum nl80211_dfs_regions
reg_get_dfs_region(struct wiphy
*wiphy
)
160 const struct ieee80211_regdomain
*regd
= NULL
;
161 const struct ieee80211_regdomain
*wiphy_regd
= NULL
;
163 regd
= get_cfg80211_regdom();
167 wiphy_regd
= get_wiphy_regdom(wiphy
);
171 if (wiphy_regd
->dfs_region
== regd
->dfs_region
)
174 REG_DBG_PRINT("%s: device specific dfs_region "
175 "(%s) disagrees with cfg80211's "
176 "central dfs_region (%s)\n",
177 dev_name(&wiphy
->dev
),
178 reg_dfs_region_str(wiphy_regd
->dfs_region
),
179 reg_dfs_region_str(regd
->dfs_region
));
182 return regd
->dfs_region
;
185 static void rcu_free_regdom(const struct ieee80211_regdomain
*r
)
189 kfree_rcu((struct ieee80211_regdomain
*)r
, rcu_head
);
192 static struct regulatory_request
*get_last_request(void)
194 return rcu_dereference_rtnl(last_request
);
197 /* Used to queue up regulatory hints */
198 static LIST_HEAD(reg_requests_list
);
199 static spinlock_t reg_requests_lock
;
201 /* Used to queue up beacon hints for review */
202 static LIST_HEAD(reg_pending_beacons
);
203 static spinlock_t reg_pending_beacons_lock
;
205 /* Used to keep track of processed beacon hints */
206 static LIST_HEAD(reg_beacon_list
);
209 struct list_head list
;
210 struct ieee80211_channel chan
;
213 static void reg_todo(struct work_struct
*work
);
214 static DECLARE_WORK(reg_work
, reg_todo
);
216 static void reg_timeout_work(struct work_struct
*work
);
217 static DECLARE_DELAYED_WORK(reg_timeout
, reg_timeout_work
);
219 /* We keep a static world regulatory domain in case of the absence of CRDA */
220 static const struct ieee80211_regdomain world_regdom
= {
224 /* IEEE 802.11b/g, channels 1..11 */
225 REG_RULE(2412-10, 2462+10, 40, 6, 20, 0),
226 /* IEEE 802.11b/g, channels 12..13. */
227 REG_RULE(2467-10, 2472+10, 40, 6, 20,
229 /* IEEE 802.11 channel 14 - Only JP enables
230 * this and for 802.11b only */
231 REG_RULE(2484-10, 2484+10, 20, 6, 20,
233 NL80211_RRF_NO_OFDM
),
234 /* IEEE 802.11a, channel 36..48 */
235 REG_RULE(5180-10, 5240+10, 160, 6, 20,
238 /* IEEE 802.11a, channel 52..64 - DFS required */
239 REG_RULE(5260-10, 5320+10, 160, 6, 20,
243 /* IEEE 802.11a, channel 100..144 - DFS required */
244 REG_RULE(5500-10, 5720+10, 160, 6, 20,
248 /* IEEE 802.11a, channel 149..165 */
249 REG_RULE(5745-10, 5825+10, 80, 6, 20,
252 /* IEEE 802.11ad (60gHz), channels 1..3 */
253 REG_RULE(56160+2160*1-1080, 56160+2160*3+1080, 2160, 0, 0, 0),
257 /* protected by RTNL */
258 static const struct ieee80211_regdomain
*cfg80211_world_regdom
=
261 static char *ieee80211_regdom
= "00";
262 static char user_alpha2
[2];
264 module_param(ieee80211_regdom
, charp
, 0444);
265 MODULE_PARM_DESC(ieee80211_regdom
, "IEEE 802.11 regulatory domain code");
267 static void reg_free_request(struct regulatory_request
*request
)
269 if (request
!= get_last_request())
273 static void reg_free_last_request(void)
275 struct regulatory_request
*lr
= get_last_request();
277 if (lr
!= &core_request_world
&& lr
)
278 kfree_rcu(lr
, rcu_head
);
281 static void reg_update_last_request(struct regulatory_request
*request
)
283 struct regulatory_request
*lr
;
285 lr
= get_last_request();
289 reg_free_last_request();
290 rcu_assign_pointer(last_request
, request
);
293 static void reset_regdomains(bool full_reset
,
294 const struct ieee80211_regdomain
*new_regdom
)
296 const struct ieee80211_regdomain
*r
;
300 r
= get_cfg80211_regdom();
302 /* avoid freeing static information or freeing something twice */
303 if (r
== cfg80211_world_regdom
)
305 if (cfg80211_world_regdom
== &world_regdom
)
306 cfg80211_world_regdom
= NULL
;
307 if (r
== &world_regdom
)
311 rcu_free_regdom(cfg80211_world_regdom
);
313 cfg80211_world_regdom
= &world_regdom
;
314 rcu_assign_pointer(cfg80211_regdomain
, new_regdom
);
319 reg_update_last_request(&core_request_world
);
323 * Dynamic world regulatory domain requested by the wireless
324 * core upon initialization
326 static void update_world_regdomain(const struct ieee80211_regdomain
*rd
)
328 struct regulatory_request
*lr
;
330 lr
= get_last_request();
334 reset_regdomains(false, rd
);
336 cfg80211_world_regdom
= rd
;
339 bool is_world_regdom(const char *alpha2
)
343 return alpha2
[0] == '0' && alpha2
[1] == '0';
346 static bool is_alpha2_set(const char *alpha2
)
350 return alpha2
[0] && alpha2
[1];
353 static bool is_unknown_alpha2(const char *alpha2
)
358 * Special case where regulatory domain was built by driver
359 * but a specific alpha2 cannot be determined
361 return alpha2
[0] == '9' && alpha2
[1] == '9';
364 static bool is_intersected_alpha2(const char *alpha2
)
369 * Special case where regulatory domain is the
370 * result of an intersection between two regulatory domain
373 return alpha2
[0] == '9' && alpha2
[1] == '8';
376 static bool is_an_alpha2(const char *alpha2
)
380 return isalpha(alpha2
[0]) && isalpha(alpha2
[1]);
383 static bool alpha2_equal(const char *alpha2_x
, const char *alpha2_y
)
385 if (!alpha2_x
|| !alpha2_y
)
387 return alpha2_x
[0] == alpha2_y
[0] && alpha2_x
[1] == alpha2_y
[1];
390 static bool regdom_changes(const char *alpha2
)
392 const struct ieee80211_regdomain
*r
= get_cfg80211_regdom();
396 return !alpha2_equal(r
->alpha2
, alpha2
);
400 * The NL80211_REGDOM_SET_BY_USER regdom alpha2 is cached, this lets
401 * you know if a valid regulatory hint with NL80211_REGDOM_SET_BY_USER
402 * has ever been issued.
404 static bool is_user_regdom_saved(void)
406 if (user_alpha2
[0] == '9' && user_alpha2
[1] == '7')
409 /* This would indicate a mistake on the design */
410 if (WARN(!is_world_regdom(user_alpha2
) && !is_an_alpha2(user_alpha2
),
411 "Unexpected user alpha2: %c%c\n",
412 user_alpha2
[0], user_alpha2
[1]))
418 static const struct ieee80211_regdomain
*
419 reg_copy_regd(const struct ieee80211_regdomain
*src_regd
)
421 struct ieee80211_regdomain
*regd
;
426 sizeof(struct ieee80211_regdomain
) +
427 src_regd
->n_reg_rules
* sizeof(struct ieee80211_reg_rule
);
429 regd
= kzalloc(size_of_regd
, GFP_KERNEL
);
431 return ERR_PTR(-ENOMEM
);
433 memcpy(regd
, src_regd
, sizeof(struct ieee80211_regdomain
));
435 for (i
= 0; i
< src_regd
->n_reg_rules
; i
++)
436 memcpy(®d
->reg_rules
[i
], &src_regd
->reg_rules
[i
],
437 sizeof(struct ieee80211_reg_rule
));
442 #ifdef CONFIG_CFG80211_INTERNAL_REGDB
443 struct reg_regdb_search_request
{
445 struct list_head list
;
448 static LIST_HEAD(reg_regdb_search_list
);
449 static DEFINE_MUTEX(reg_regdb_search_mutex
);
451 static void reg_regdb_search(struct work_struct
*work
)
453 struct reg_regdb_search_request
*request
;
454 const struct ieee80211_regdomain
*curdom
, *regdom
= NULL
;
459 mutex_lock(®_regdb_search_mutex
);
460 while (!list_empty(®_regdb_search_list
)) {
461 request
= list_first_entry(®_regdb_search_list
,
462 struct reg_regdb_search_request
,
464 list_del(&request
->list
);
466 for (i
= 0; i
< reg_regdb_size
; i
++) {
467 curdom
= reg_regdb
[i
];
469 if (alpha2_equal(request
->alpha2
, curdom
->alpha2
)) {
470 regdom
= reg_copy_regd(curdom
);
477 mutex_unlock(®_regdb_search_mutex
);
479 if (!IS_ERR_OR_NULL(regdom
))
485 static DECLARE_WORK(reg_regdb_work
, reg_regdb_search
);
487 static void reg_regdb_query(const char *alpha2
)
489 struct reg_regdb_search_request
*request
;
494 request
= kzalloc(sizeof(struct reg_regdb_search_request
), GFP_KERNEL
);
498 memcpy(request
->alpha2
, alpha2
, 2);
500 mutex_lock(®_regdb_search_mutex
);
501 list_add_tail(&request
->list
, ®_regdb_search_list
);
502 mutex_unlock(®_regdb_search_mutex
);
504 schedule_work(®_regdb_work
);
507 /* Feel free to add any other sanity checks here */
508 static void reg_regdb_size_check(void)
510 /* We should ideally BUILD_BUG_ON() but then random builds would fail */
511 WARN_ONCE(!reg_regdb_size
, "db.txt is empty, you should update it...");
514 static inline void reg_regdb_size_check(void) {}
515 static inline void reg_regdb_query(const char *alpha2
) {}
516 #endif /* CONFIG_CFG80211_INTERNAL_REGDB */
519 * This lets us keep regulatory code which is updated on a regulatory
520 * basis in userspace.
522 static int call_crda(const char *alpha2
)
525 char *env
[] = { country
, NULL
};
527 snprintf(country
, sizeof(country
), "COUNTRY=%c%c",
528 alpha2
[0], alpha2
[1]);
530 if (!is_world_regdom((char *) alpha2
))
531 pr_info("Calling CRDA for country: %c%c\n",
532 alpha2
[0], alpha2
[1]);
534 pr_info("Calling CRDA to update world regulatory domain\n");
536 /* query internal regulatory database (if it exists) */
537 reg_regdb_query(alpha2
);
539 return kobject_uevent_env(®_pdev
->dev
.kobj
, KOBJ_CHANGE
, env
);
542 static enum reg_request_treatment
543 reg_call_crda(struct regulatory_request
*request
)
545 if (call_crda(request
->alpha2
))
546 return REG_REQ_IGNORE
;
550 bool reg_is_valid_request(const char *alpha2
)
552 struct regulatory_request
*lr
= get_last_request();
554 if (!lr
|| lr
->processed
)
557 return alpha2_equal(lr
->alpha2
, alpha2
);
560 static const struct ieee80211_regdomain
*reg_get_regdomain(struct wiphy
*wiphy
)
562 struct regulatory_request
*lr
= get_last_request();
565 * Follow the driver's regulatory domain, if present, unless a country
566 * IE has been processed or a user wants to help complaince further
568 if (lr
->initiator
!= NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
569 lr
->initiator
!= NL80211_REGDOM_SET_BY_USER
&&
571 return get_wiphy_regdom(wiphy
);
573 return get_cfg80211_regdom();
576 unsigned int reg_get_max_bandwidth(const struct ieee80211_regdomain
*rd
,
577 const struct ieee80211_reg_rule
*rule
)
579 const struct ieee80211_freq_range
*freq_range
= &rule
->freq_range
;
580 const struct ieee80211_freq_range
*freq_range_tmp
;
581 const struct ieee80211_reg_rule
*tmp
;
582 u32 start_freq
, end_freq
, idx
, no
;
584 for (idx
= 0; idx
< rd
->n_reg_rules
; idx
++)
585 if (rule
== &rd
->reg_rules
[idx
])
588 if (idx
== rd
->n_reg_rules
)
595 tmp
= &rd
->reg_rules
[--no
];
596 freq_range_tmp
= &tmp
->freq_range
;
598 if (freq_range_tmp
->end_freq_khz
< freq_range
->start_freq_khz
)
601 freq_range
= freq_range_tmp
;
604 start_freq
= freq_range
->start_freq_khz
;
607 freq_range
= &rule
->freq_range
;
610 while (no
< rd
->n_reg_rules
- 1) {
611 tmp
= &rd
->reg_rules
[++no
];
612 freq_range_tmp
= &tmp
->freq_range
;
614 if (freq_range_tmp
->start_freq_khz
> freq_range
->end_freq_khz
)
617 freq_range
= freq_range_tmp
;
620 end_freq
= freq_range
->end_freq_khz
;
622 return end_freq
- start_freq
;
625 /* Sanity check on a regulatory rule */
626 static bool is_valid_reg_rule(const struct ieee80211_reg_rule
*rule
)
628 const struct ieee80211_freq_range
*freq_range
= &rule
->freq_range
;
631 if (freq_range
->start_freq_khz
<= 0 || freq_range
->end_freq_khz
<= 0)
634 if (freq_range
->start_freq_khz
> freq_range
->end_freq_khz
)
637 freq_diff
= freq_range
->end_freq_khz
- freq_range
->start_freq_khz
;
639 if (freq_range
->end_freq_khz
<= freq_range
->start_freq_khz
||
640 freq_range
->max_bandwidth_khz
> freq_diff
)
646 static bool is_valid_rd(const struct ieee80211_regdomain
*rd
)
648 const struct ieee80211_reg_rule
*reg_rule
= NULL
;
651 if (!rd
->n_reg_rules
)
654 if (WARN_ON(rd
->n_reg_rules
> NL80211_MAX_SUPP_REG_RULES
))
657 for (i
= 0; i
< rd
->n_reg_rules
; i
++) {
658 reg_rule
= &rd
->reg_rules
[i
];
659 if (!is_valid_reg_rule(reg_rule
))
666 static bool reg_does_bw_fit(const struct ieee80211_freq_range
*freq_range
,
667 u32 center_freq_khz
, u32 bw_khz
)
669 u32 start_freq_khz
, end_freq_khz
;
671 start_freq_khz
= center_freq_khz
- (bw_khz
/2);
672 end_freq_khz
= center_freq_khz
+ (bw_khz
/2);
674 if (start_freq_khz
>= freq_range
->start_freq_khz
&&
675 end_freq_khz
<= freq_range
->end_freq_khz
)
682 * freq_in_rule_band - tells us if a frequency is in a frequency band
683 * @freq_range: frequency rule we want to query
684 * @freq_khz: frequency we are inquiring about
686 * This lets us know if a specific frequency rule is or is not relevant to
687 * a specific frequency's band. Bands are device specific and artificial
688 * definitions (the "2.4 GHz band", the "5 GHz band" and the "60GHz band"),
689 * however it is safe for now to assume that a frequency rule should not be
690 * part of a frequency's band if the start freq or end freq are off by more
691 * than 2 GHz for the 2.4 and 5 GHz bands, and by more than 10 GHz for the
693 * This resolution can be lowered and should be considered as we add
694 * regulatory rule support for other "bands".
696 static bool freq_in_rule_band(const struct ieee80211_freq_range
*freq_range
,
699 #define ONE_GHZ_IN_KHZ 1000000
701 * From 802.11ad: directional multi-gigabit (DMG):
702 * Pertaining to operation in a frequency band containing a channel
703 * with the Channel starting frequency above 45 GHz.
705 u32 limit
= freq_khz
> 45 * ONE_GHZ_IN_KHZ
?
706 10 * ONE_GHZ_IN_KHZ
: 2 * ONE_GHZ_IN_KHZ
;
707 if (abs(freq_khz
- freq_range
->start_freq_khz
) <= limit
)
709 if (abs(freq_khz
- freq_range
->end_freq_khz
) <= limit
)
712 #undef ONE_GHZ_IN_KHZ
716 * Later on we can perhaps use the more restrictive DFS
717 * region but we don't have information for that yet so
718 * for now simply disallow conflicts.
720 static enum nl80211_dfs_regions
721 reg_intersect_dfs_region(const enum nl80211_dfs_regions dfs_region1
,
722 const enum nl80211_dfs_regions dfs_region2
)
724 if (dfs_region1
!= dfs_region2
)
725 return NL80211_DFS_UNSET
;
730 * Helper for regdom_intersect(), this does the real
731 * mathematical intersection fun
733 static int reg_rules_intersect(const struct ieee80211_regdomain
*rd1
,
734 const struct ieee80211_regdomain
*rd2
,
735 const struct ieee80211_reg_rule
*rule1
,
736 const struct ieee80211_reg_rule
*rule2
,
737 struct ieee80211_reg_rule
*intersected_rule
)
739 const struct ieee80211_freq_range
*freq_range1
, *freq_range2
;
740 struct ieee80211_freq_range
*freq_range
;
741 const struct ieee80211_power_rule
*power_rule1
, *power_rule2
;
742 struct ieee80211_power_rule
*power_rule
;
743 u32 freq_diff
, max_bandwidth1
, max_bandwidth2
;
745 freq_range1
= &rule1
->freq_range
;
746 freq_range2
= &rule2
->freq_range
;
747 freq_range
= &intersected_rule
->freq_range
;
749 power_rule1
= &rule1
->power_rule
;
750 power_rule2
= &rule2
->power_rule
;
751 power_rule
= &intersected_rule
->power_rule
;
753 freq_range
->start_freq_khz
= max(freq_range1
->start_freq_khz
,
754 freq_range2
->start_freq_khz
);
755 freq_range
->end_freq_khz
= min(freq_range1
->end_freq_khz
,
756 freq_range2
->end_freq_khz
);
758 max_bandwidth1
= freq_range1
->max_bandwidth_khz
;
759 max_bandwidth2
= freq_range2
->max_bandwidth_khz
;
761 if (rule1
->flags
& NL80211_RRF_AUTO_BW
)
762 max_bandwidth1
= reg_get_max_bandwidth(rd1
, rule1
);
763 if (rule2
->flags
& NL80211_RRF_AUTO_BW
)
764 max_bandwidth2
= reg_get_max_bandwidth(rd2
, rule2
);
766 freq_range
->max_bandwidth_khz
= min(max_bandwidth1
, max_bandwidth2
);
768 intersected_rule
->flags
= rule1
->flags
| rule2
->flags
;
771 * In case NL80211_RRF_AUTO_BW requested for both rules
772 * set AUTO_BW in intersected rule also. Next we will
773 * calculate BW correctly in handle_channel function.
774 * In other case remove AUTO_BW flag while we calculate
775 * maximum bandwidth correctly and auto calculation is
778 if ((rule1
->flags
& NL80211_RRF_AUTO_BW
) &&
779 (rule2
->flags
& NL80211_RRF_AUTO_BW
))
780 intersected_rule
->flags
|= NL80211_RRF_AUTO_BW
;
782 intersected_rule
->flags
&= ~NL80211_RRF_AUTO_BW
;
784 freq_diff
= freq_range
->end_freq_khz
- freq_range
->start_freq_khz
;
785 if (freq_range
->max_bandwidth_khz
> freq_diff
)
786 freq_range
->max_bandwidth_khz
= freq_diff
;
788 power_rule
->max_eirp
= min(power_rule1
->max_eirp
,
789 power_rule2
->max_eirp
);
790 power_rule
->max_antenna_gain
= min(power_rule1
->max_antenna_gain
,
791 power_rule2
->max_antenna_gain
);
793 intersected_rule
->dfs_cac_ms
= max(rule1
->dfs_cac_ms
,
796 if (!is_valid_reg_rule(intersected_rule
))
803 * regdom_intersect - do the intersection between two regulatory domains
804 * @rd1: first regulatory domain
805 * @rd2: second regulatory domain
807 * Use this function to get the intersection between two regulatory domains.
808 * Once completed we will mark the alpha2 for the rd as intersected, "98",
809 * as no one single alpha2 can represent this regulatory domain.
811 * Returns a pointer to the regulatory domain structure which will hold the
812 * resulting intersection of rules between rd1 and rd2. We will
813 * kzalloc() this structure for you.
815 static struct ieee80211_regdomain
*
816 regdom_intersect(const struct ieee80211_regdomain
*rd1
,
817 const struct ieee80211_regdomain
*rd2
)
821 unsigned int num_rules
= 0, rule_idx
= 0;
822 const struct ieee80211_reg_rule
*rule1
, *rule2
;
823 struct ieee80211_reg_rule
*intersected_rule
;
824 struct ieee80211_regdomain
*rd
;
825 /* This is just a dummy holder to help us count */
826 struct ieee80211_reg_rule dummy_rule
;
832 * First we get a count of the rules we'll need, then we actually
833 * build them. This is to so we can malloc() and free() a
834 * regdomain once. The reason we use reg_rules_intersect() here
835 * is it will return -EINVAL if the rule computed makes no sense.
836 * All rules that do check out OK are valid.
839 for (x
= 0; x
< rd1
->n_reg_rules
; x
++) {
840 rule1
= &rd1
->reg_rules
[x
];
841 for (y
= 0; y
< rd2
->n_reg_rules
; y
++) {
842 rule2
= &rd2
->reg_rules
[y
];
843 if (!reg_rules_intersect(rd1
, rd2
, rule1
, rule2
,
852 size_of_regd
= sizeof(struct ieee80211_regdomain
) +
853 num_rules
* sizeof(struct ieee80211_reg_rule
);
855 rd
= kzalloc(size_of_regd
, GFP_KERNEL
);
859 for (x
= 0; x
< rd1
->n_reg_rules
&& rule_idx
< num_rules
; x
++) {
860 rule1
= &rd1
->reg_rules
[x
];
861 for (y
= 0; y
< rd2
->n_reg_rules
&& rule_idx
< num_rules
; y
++) {
862 rule2
= &rd2
->reg_rules
[y
];
864 * This time around instead of using the stack lets
865 * write to the target rule directly saving ourselves
868 intersected_rule
= &rd
->reg_rules
[rule_idx
];
869 r
= reg_rules_intersect(rd1
, rd2
, rule1
, rule2
,
872 * No need to memset here the intersected rule here as
873 * we're not using the stack anymore
881 if (rule_idx
!= num_rules
) {
886 rd
->n_reg_rules
= num_rules
;
889 rd
->dfs_region
= reg_intersect_dfs_region(rd1
->dfs_region
,
896 * XXX: add support for the rest of enum nl80211_reg_rule_flags, we may
897 * want to just have the channel structure use these
899 static u32
map_regdom_flags(u32 rd_flags
)
901 u32 channel_flags
= 0;
902 if (rd_flags
& NL80211_RRF_NO_IR_ALL
)
903 channel_flags
|= IEEE80211_CHAN_NO_IR
;
904 if (rd_flags
& NL80211_RRF_DFS
)
905 channel_flags
|= IEEE80211_CHAN_RADAR
;
906 if (rd_flags
& NL80211_RRF_NO_OFDM
)
907 channel_flags
|= IEEE80211_CHAN_NO_OFDM
;
908 if (rd_flags
& NL80211_RRF_NO_OUTDOOR
)
909 channel_flags
|= IEEE80211_CHAN_INDOOR_ONLY
;
910 return channel_flags
;
913 static const struct ieee80211_reg_rule
*
914 freq_reg_info_regd(struct wiphy
*wiphy
, u32 center_freq
,
915 const struct ieee80211_regdomain
*regd
)
918 bool band_rule_found
= false;
919 bool bw_fits
= false;
922 return ERR_PTR(-EINVAL
);
924 for (i
= 0; i
< regd
->n_reg_rules
; i
++) {
925 const struct ieee80211_reg_rule
*rr
;
926 const struct ieee80211_freq_range
*fr
= NULL
;
928 rr
= ®d
->reg_rules
[i
];
929 fr
= &rr
->freq_range
;
932 * We only need to know if one frequency rule was
933 * was in center_freq's band, that's enough, so lets
934 * not overwrite it once found
936 if (!band_rule_found
)
937 band_rule_found
= freq_in_rule_band(fr
, center_freq
);
939 bw_fits
= reg_does_bw_fit(fr
, center_freq
, MHZ_TO_KHZ(20));
941 if (band_rule_found
&& bw_fits
)
945 if (!band_rule_found
)
946 return ERR_PTR(-ERANGE
);
948 return ERR_PTR(-EINVAL
);
951 const struct ieee80211_reg_rule
*freq_reg_info(struct wiphy
*wiphy
,
954 const struct ieee80211_regdomain
*regd
;
956 regd
= reg_get_regdomain(wiphy
);
958 return freq_reg_info_regd(wiphy
, center_freq
, regd
);
960 EXPORT_SYMBOL(freq_reg_info
);
962 const char *reg_initiator_name(enum nl80211_reg_initiator initiator
)
965 case NL80211_REGDOM_SET_BY_CORE
:
967 case NL80211_REGDOM_SET_BY_USER
:
969 case NL80211_REGDOM_SET_BY_DRIVER
:
971 case NL80211_REGDOM_SET_BY_COUNTRY_IE
:
978 EXPORT_SYMBOL(reg_initiator_name
);
980 #ifdef CONFIG_CFG80211_REG_DEBUG
981 static void chan_reg_rule_print_dbg(const struct ieee80211_regdomain
*regd
,
982 struct ieee80211_channel
*chan
,
983 const struct ieee80211_reg_rule
*reg_rule
)
985 const struct ieee80211_power_rule
*power_rule
;
986 const struct ieee80211_freq_range
*freq_range
;
987 char max_antenna_gain
[32], bw
[32];
989 power_rule
= ®_rule
->power_rule
;
990 freq_range
= ®_rule
->freq_range
;
992 if (!power_rule
->max_antenna_gain
)
993 snprintf(max_antenna_gain
, sizeof(max_antenna_gain
), "N/A");
995 snprintf(max_antenna_gain
, sizeof(max_antenna_gain
), "%d",
996 power_rule
->max_antenna_gain
);
998 if (reg_rule
->flags
& NL80211_RRF_AUTO_BW
)
999 snprintf(bw
, sizeof(bw
), "%d KHz, %d KHz AUTO",
1000 freq_range
->max_bandwidth_khz
,
1001 reg_get_max_bandwidth(regd
, reg_rule
));
1003 snprintf(bw
, sizeof(bw
), "%d KHz",
1004 freq_range
->max_bandwidth_khz
);
1006 REG_DBG_PRINT("Updating information on frequency %d MHz with regulatory rule:\n",
1009 REG_DBG_PRINT("%d KHz - %d KHz @ %s), (%s mBi, %d mBm)\n",
1010 freq_range
->start_freq_khz
, freq_range
->end_freq_khz
,
1011 bw
, max_antenna_gain
,
1012 power_rule
->max_eirp
);
1015 static void chan_reg_rule_print_dbg(const struct ieee80211_regdomain
*regd
,
1016 struct ieee80211_channel
*chan
,
1017 const struct ieee80211_reg_rule
*reg_rule
)
1024 * Note that right now we assume the desired channel bandwidth
1025 * is always 20 MHz for each individual channel (HT40 uses 20 MHz
1026 * per channel, the primary and the extension channel).
1028 static void handle_channel(struct wiphy
*wiphy
,
1029 enum nl80211_reg_initiator initiator
,
1030 struct ieee80211_channel
*chan
)
1032 u32 flags
, bw_flags
= 0;
1033 const struct ieee80211_reg_rule
*reg_rule
= NULL
;
1034 const struct ieee80211_power_rule
*power_rule
= NULL
;
1035 const struct ieee80211_freq_range
*freq_range
= NULL
;
1036 struct wiphy
*request_wiphy
= NULL
;
1037 struct regulatory_request
*lr
= get_last_request();
1038 const struct ieee80211_regdomain
*regd
;
1039 u32 max_bandwidth_khz
;
1041 request_wiphy
= wiphy_idx_to_wiphy(lr
->wiphy_idx
);
1043 flags
= chan
->orig_flags
;
1045 reg_rule
= freq_reg_info(wiphy
, MHZ_TO_KHZ(chan
->center_freq
));
1046 if (IS_ERR(reg_rule
)) {
1048 * We will disable all channels that do not match our
1049 * received regulatory rule unless the hint is coming
1050 * from a Country IE and the Country IE had no information
1051 * about a band. The IEEE 802.11 spec allows for an AP
1052 * to send only a subset of the regulatory rules allowed,
1053 * so an AP in the US that only supports 2.4 GHz may only send
1054 * a country IE with information for the 2.4 GHz band
1055 * while 5 GHz is still supported.
1057 if (initiator
== NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
1058 PTR_ERR(reg_rule
) == -ERANGE
)
1061 if (lr
->initiator
== NL80211_REGDOM_SET_BY_DRIVER
&&
1062 request_wiphy
&& request_wiphy
== wiphy
&&
1063 request_wiphy
->regulatory_flags
& REGULATORY_STRICT_REG
) {
1064 REG_DBG_PRINT("Disabling freq %d MHz for good\n",
1066 chan
->orig_flags
|= IEEE80211_CHAN_DISABLED
;
1067 chan
->flags
= chan
->orig_flags
;
1069 REG_DBG_PRINT("Disabling freq %d MHz\n",
1071 chan
->flags
|= IEEE80211_CHAN_DISABLED
;
1076 regd
= reg_get_regdomain(wiphy
);
1077 chan_reg_rule_print_dbg(regd
, chan
, reg_rule
);
1079 power_rule
= ®_rule
->power_rule
;
1080 freq_range
= ®_rule
->freq_range
;
1082 max_bandwidth_khz
= freq_range
->max_bandwidth_khz
;
1083 /* Check if auto calculation requested */
1084 if (reg_rule
->flags
& NL80211_RRF_AUTO_BW
)
1085 max_bandwidth_khz
= reg_get_max_bandwidth(regd
, reg_rule
);
1087 if (max_bandwidth_khz
< MHZ_TO_KHZ(40))
1088 bw_flags
= IEEE80211_CHAN_NO_HT40
;
1089 if (max_bandwidth_khz
< MHZ_TO_KHZ(80))
1090 bw_flags
|= IEEE80211_CHAN_NO_80MHZ
;
1091 if (max_bandwidth_khz
< MHZ_TO_KHZ(160))
1092 bw_flags
|= IEEE80211_CHAN_NO_160MHZ
;
1094 if (lr
->initiator
== NL80211_REGDOM_SET_BY_DRIVER
&&
1095 request_wiphy
&& request_wiphy
== wiphy
&&
1096 request_wiphy
->regulatory_flags
& REGULATORY_STRICT_REG
) {
1098 * This guarantees the driver's requested regulatory domain
1099 * will always be used as a base for further regulatory
1102 chan
->flags
= chan
->orig_flags
=
1103 map_regdom_flags(reg_rule
->flags
) | bw_flags
;
1104 chan
->max_antenna_gain
= chan
->orig_mag
=
1105 (int) MBI_TO_DBI(power_rule
->max_antenna_gain
);
1106 chan
->max_reg_power
= chan
->max_power
= chan
->orig_mpwr
=
1107 (int) MBM_TO_DBM(power_rule
->max_eirp
);
1109 if (chan
->flags
& IEEE80211_CHAN_RADAR
) {
1110 chan
->dfs_cac_ms
= IEEE80211_DFS_MIN_CAC_TIME_MS
;
1111 if (reg_rule
->dfs_cac_ms
)
1112 chan
->dfs_cac_ms
= reg_rule
->dfs_cac_ms
;
1118 chan
->dfs_state
= NL80211_DFS_USABLE
;
1119 chan
->dfs_state_entered
= jiffies
;
1121 chan
->beacon_found
= false;
1122 chan
->flags
= flags
| bw_flags
| map_regdom_flags(reg_rule
->flags
);
1123 chan
->max_antenna_gain
=
1124 min_t(int, chan
->orig_mag
,
1125 MBI_TO_DBI(power_rule
->max_antenna_gain
));
1126 chan
->max_reg_power
= (int) MBM_TO_DBM(power_rule
->max_eirp
);
1128 if (chan
->flags
& IEEE80211_CHAN_RADAR
) {
1129 if (reg_rule
->dfs_cac_ms
)
1130 chan
->dfs_cac_ms
= reg_rule
->dfs_cac_ms
;
1132 chan
->dfs_cac_ms
= IEEE80211_DFS_MIN_CAC_TIME_MS
;
1135 if (chan
->orig_mpwr
) {
1137 * Devices that use REGULATORY_COUNTRY_IE_FOLLOW_POWER
1138 * will always follow the passed country IE power settings.
1140 if (initiator
== NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
1141 wiphy
->regulatory_flags
& REGULATORY_COUNTRY_IE_FOLLOW_POWER
)
1142 chan
->max_power
= chan
->max_reg_power
;
1144 chan
->max_power
= min(chan
->orig_mpwr
,
1145 chan
->max_reg_power
);
1147 chan
->max_power
= chan
->max_reg_power
;
1150 static void handle_band(struct wiphy
*wiphy
,
1151 enum nl80211_reg_initiator initiator
,
1152 struct ieee80211_supported_band
*sband
)
1159 for (i
= 0; i
< sband
->n_channels
; i
++)
1160 handle_channel(wiphy
, initiator
, &sband
->channels
[i
]);
1163 static bool reg_request_cell_base(struct regulatory_request
*request
)
1165 if (request
->initiator
!= NL80211_REGDOM_SET_BY_USER
)
1167 return request
->user_reg_hint_type
== NL80211_USER_REG_HINT_CELL_BASE
;
1170 static bool reg_request_indoor(struct regulatory_request
*request
)
1172 if (request
->initiator
!= NL80211_REGDOM_SET_BY_USER
)
1174 return request
->user_reg_hint_type
== NL80211_USER_REG_HINT_INDOOR
;
1177 bool reg_last_request_cell_base(void)
1179 return reg_request_cell_base(get_last_request());
1182 #ifdef CONFIG_CFG80211_REG_CELLULAR_HINTS
1183 /* Core specific check */
1184 static enum reg_request_treatment
1185 reg_ignore_cell_hint(struct regulatory_request
*pending_request
)
1187 struct regulatory_request
*lr
= get_last_request();
1189 if (!reg_num_devs_support_basehint
)
1190 return REG_REQ_IGNORE
;
1192 if (reg_request_cell_base(lr
) &&
1193 !regdom_changes(pending_request
->alpha2
))
1194 return REG_REQ_ALREADY_SET
;
1199 /* Device specific check */
1200 static bool reg_dev_ignore_cell_hint(struct wiphy
*wiphy
)
1202 return !(wiphy
->features
& NL80211_FEATURE_CELL_BASE_REG_HINTS
);
1205 static int reg_ignore_cell_hint(struct regulatory_request
*pending_request
)
1207 return REG_REQ_IGNORE
;
1210 static bool reg_dev_ignore_cell_hint(struct wiphy
*wiphy
)
1216 static bool wiphy_strict_alpha2_regd(struct wiphy
*wiphy
)
1218 if (wiphy
->regulatory_flags
& REGULATORY_STRICT_REG
&&
1219 !(wiphy
->regulatory_flags
& REGULATORY_CUSTOM_REG
))
1224 static bool ignore_reg_update(struct wiphy
*wiphy
,
1225 enum nl80211_reg_initiator initiator
)
1227 struct regulatory_request
*lr
= get_last_request();
1230 REG_DBG_PRINT("Ignoring regulatory request set by %s "
1231 "since last_request is not set\n",
1232 reg_initiator_name(initiator
));
1236 if (initiator
== NL80211_REGDOM_SET_BY_CORE
&&
1237 wiphy
->regulatory_flags
& REGULATORY_CUSTOM_REG
) {
1238 REG_DBG_PRINT("Ignoring regulatory request set by %s "
1239 "since the driver uses its own custom "
1240 "regulatory domain\n",
1241 reg_initiator_name(initiator
));
1246 * wiphy->regd will be set once the device has its own
1247 * desired regulatory domain set
1249 if (wiphy_strict_alpha2_regd(wiphy
) && !wiphy
->regd
&&
1250 initiator
!= NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
1251 !is_world_regdom(lr
->alpha2
)) {
1252 REG_DBG_PRINT("Ignoring regulatory request set by %s "
1253 "since the driver requires its own regulatory "
1254 "domain to be set first\n",
1255 reg_initiator_name(initiator
));
1259 if (reg_request_cell_base(lr
))
1260 return reg_dev_ignore_cell_hint(wiphy
);
1265 static bool reg_is_world_roaming(struct wiphy
*wiphy
)
1267 const struct ieee80211_regdomain
*cr
= get_cfg80211_regdom();
1268 const struct ieee80211_regdomain
*wr
= get_wiphy_regdom(wiphy
);
1269 struct regulatory_request
*lr
= get_last_request();
1271 if (is_world_regdom(cr
->alpha2
) || (wr
&& is_world_regdom(wr
->alpha2
)))
1274 if (lr
&& lr
->initiator
!= NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
1275 wiphy
->regulatory_flags
& REGULATORY_CUSTOM_REG
)
1281 static void handle_reg_beacon(struct wiphy
*wiphy
, unsigned int chan_idx
,
1282 struct reg_beacon
*reg_beacon
)
1284 struct ieee80211_supported_band
*sband
;
1285 struct ieee80211_channel
*chan
;
1286 bool channel_changed
= false;
1287 struct ieee80211_channel chan_before
;
1289 sband
= wiphy
->bands
[reg_beacon
->chan
.band
];
1290 chan
= &sband
->channels
[chan_idx
];
1292 if (likely(chan
->center_freq
!= reg_beacon
->chan
.center_freq
))
1295 if (chan
->beacon_found
)
1298 chan
->beacon_found
= true;
1300 if (!reg_is_world_roaming(wiphy
))
1303 if (wiphy
->regulatory_flags
& REGULATORY_DISABLE_BEACON_HINTS
)
1306 chan_before
.center_freq
= chan
->center_freq
;
1307 chan_before
.flags
= chan
->flags
;
1309 if (chan
->flags
& IEEE80211_CHAN_NO_IR
) {
1310 chan
->flags
&= ~IEEE80211_CHAN_NO_IR
;
1311 channel_changed
= true;
1314 if (channel_changed
)
1315 nl80211_send_beacon_hint_event(wiphy
, &chan_before
, chan
);
1319 * Called when a scan on a wiphy finds a beacon on
1322 static void wiphy_update_new_beacon(struct wiphy
*wiphy
,
1323 struct reg_beacon
*reg_beacon
)
1326 struct ieee80211_supported_band
*sband
;
1328 if (!wiphy
->bands
[reg_beacon
->chan
.band
])
1331 sband
= wiphy
->bands
[reg_beacon
->chan
.band
];
1333 for (i
= 0; i
< sband
->n_channels
; i
++)
1334 handle_reg_beacon(wiphy
, i
, reg_beacon
);
1338 * Called upon reg changes or a new wiphy is added
1340 static void wiphy_update_beacon_reg(struct wiphy
*wiphy
)
1343 struct ieee80211_supported_band
*sband
;
1344 struct reg_beacon
*reg_beacon
;
1346 list_for_each_entry(reg_beacon
, ®_beacon_list
, list
) {
1347 if (!wiphy
->bands
[reg_beacon
->chan
.band
])
1349 sband
= wiphy
->bands
[reg_beacon
->chan
.band
];
1350 for (i
= 0; i
< sband
->n_channels
; i
++)
1351 handle_reg_beacon(wiphy
, i
, reg_beacon
);
1355 /* Reap the advantages of previously found beacons */
1356 static void reg_process_beacons(struct wiphy
*wiphy
)
1359 * Means we are just firing up cfg80211, so no beacons would
1360 * have been processed yet.
1364 wiphy_update_beacon_reg(wiphy
);
1367 static bool is_ht40_allowed(struct ieee80211_channel
*chan
)
1371 if (chan
->flags
& IEEE80211_CHAN_DISABLED
)
1373 /* This would happen when regulatory rules disallow HT40 completely */
1374 if ((chan
->flags
& IEEE80211_CHAN_NO_HT40
) == IEEE80211_CHAN_NO_HT40
)
1379 static void reg_process_ht_flags_channel(struct wiphy
*wiphy
,
1380 struct ieee80211_channel
*channel
)
1382 struct ieee80211_supported_band
*sband
= wiphy
->bands
[channel
->band
];
1383 struct ieee80211_channel
*channel_before
= NULL
, *channel_after
= NULL
;
1386 if (!is_ht40_allowed(channel
)) {
1387 channel
->flags
|= IEEE80211_CHAN_NO_HT40
;
1392 * We need to ensure the extension channels exist to
1393 * be able to use HT40- or HT40+, this finds them (or not)
1395 for (i
= 0; i
< sband
->n_channels
; i
++) {
1396 struct ieee80211_channel
*c
= &sband
->channels
[i
];
1398 if (c
->center_freq
== (channel
->center_freq
- 20))
1400 if (c
->center_freq
== (channel
->center_freq
+ 20))
1405 * Please note that this assumes target bandwidth is 20 MHz,
1406 * if that ever changes we also need to change the below logic
1407 * to include that as well.
1409 if (!is_ht40_allowed(channel_before
))
1410 channel
->flags
|= IEEE80211_CHAN_NO_HT40MINUS
;
1412 channel
->flags
&= ~IEEE80211_CHAN_NO_HT40MINUS
;
1414 if (!is_ht40_allowed(channel_after
))
1415 channel
->flags
|= IEEE80211_CHAN_NO_HT40PLUS
;
1417 channel
->flags
&= ~IEEE80211_CHAN_NO_HT40PLUS
;
1420 static void reg_process_ht_flags_band(struct wiphy
*wiphy
,
1421 struct ieee80211_supported_band
*sband
)
1428 for (i
= 0; i
< sband
->n_channels
; i
++)
1429 reg_process_ht_flags_channel(wiphy
, &sband
->channels
[i
]);
1432 static void reg_process_ht_flags(struct wiphy
*wiphy
)
1434 enum ieee80211_band band
;
1439 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++)
1440 reg_process_ht_flags_band(wiphy
, wiphy
->bands
[band
]);
1443 static void reg_call_notifier(struct wiphy
*wiphy
,
1444 struct regulatory_request
*request
)
1446 if (wiphy
->reg_notifier
)
1447 wiphy
->reg_notifier(wiphy
, request
);
1450 static void wiphy_update_regulatory(struct wiphy
*wiphy
,
1451 enum nl80211_reg_initiator initiator
)
1453 enum ieee80211_band band
;
1454 struct regulatory_request
*lr
= get_last_request();
1456 if (ignore_reg_update(wiphy
, initiator
)) {
1458 * Regulatory updates set by CORE are ignored for custom
1459 * regulatory cards. Let us notify the changes to the driver,
1460 * as some drivers used this to restore its orig_* reg domain.
1462 if (initiator
== NL80211_REGDOM_SET_BY_CORE
&&
1463 wiphy
->regulatory_flags
& REGULATORY_CUSTOM_REG
)
1464 reg_call_notifier(wiphy
, lr
);
1468 lr
->dfs_region
= get_cfg80211_regdom()->dfs_region
;
1470 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++)
1471 handle_band(wiphy
, initiator
, wiphy
->bands
[band
]);
1473 reg_process_beacons(wiphy
);
1474 reg_process_ht_flags(wiphy
);
1475 reg_call_notifier(wiphy
, lr
);
1478 static void update_all_wiphy_regulatory(enum nl80211_reg_initiator initiator
)
1480 struct cfg80211_registered_device
*rdev
;
1481 struct wiphy
*wiphy
;
1485 list_for_each_entry(rdev
, &cfg80211_rdev_list
, list
) {
1486 wiphy
= &rdev
->wiphy
;
1487 wiphy_update_regulatory(wiphy
, initiator
);
1491 static void handle_channel_custom(struct wiphy
*wiphy
,
1492 struct ieee80211_channel
*chan
,
1493 const struct ieee80211_regdomain
*regd
)
1496 const struct ieee80211_reg_rule
*reg_rule
= NULL
;
1497 const struct ieee80211_power_rule
*power_rule
= NULL
;
1498 const struct ieee80211_freq_range
*freq_range
= NULL
;
1499 u32 max_bandwidth_khz
;
1501 reg_rule
= freq_reg_info_regd(wiphy
, MHZ_TO_KHZ(chan
->center_freq
),
1504 if (IS_ERR(reg_rule
)) {
1505 REG_DBG_PRINT("Disabling freq %d MHz as custom regd has no rule that fits it\n",
1507 chan
->orig_flags
|= IEEE80211_CHAN_DISABLED
;
1508 chan
->flags
= chan
->orig_flags
;
1512 chan_reg_rule_print_dbg(regd
, chan
, reg_rule
);
1514 power_rule
= ®_rule
->power_rule
;
1515 freq_range
= ®_rule
->freq_range
;
1517 max_bandwidth_khz
= freq_range
->max_bandwidth_khz
;
1518 /* Check if auto calculation requested */
1519 if (reg_rule
->flags
& NL80211_RRF_AUTO_BW
)
1520 max_bandwidth_khz
= reg_get_max_bandwidth(regd
, reg_rule
);
1522 if (max_bandwidth_khz
< MHZ_TO_KHZ(40))
1523 bw_flags
= IEEE80211_CHAN_NO_HT40
;
1524 if (max_bandwidth_khz
< MHZ_TO_KHZ(80))
1525 bw_flags
|= IEEE80211_CHAN_NO_80MHZ
;
1526 if (max_bandwidth_khz
< MHZ_TO_KHZ(160))
1527 bw_flags
|= IEEE80211_CHAN_NO_160MHZ
;
1529 chan
->flags
|= map_regdom_flags(reg_rule
->flags
) | bw_flags
;
1530 chan
->max_antenna_gain
= (int) MBI_TO_DBI(power_rule
->max_antenna_gain
);
1531 chan
->max_reg_power
= chan
->max_power
=
1532 (int) MBM_TO_DBM(power_rule
->max_eirp
);
1535 static void handle_band_custom(struct wiphy
*wiphy
,
1536 struct ieee80211_supported_band
*sband
,
1537 const struct ieee80211_regdomain
*regd
)
1544 for (i
= 0; i
< sband
->n_channels
; i
++)
1545 handle_channel_custom(wiphy
, &sband
->channels
[i
], regd
);
1548 /* Used by drivers prior to wiphy registration */
1549 void wiphy_apply_custom_regulatory(struct wiphy
*wiphy
,
1550 const struct ieee80211_regdomain
*regd
)
1552 enum ieee80211_band band
;
1553 unsigned int bands_set
= 0;
1555 WARN(!(wiphy
->regulatory_flags
& REGULATORY_CUSTOM_REG
),
1556 "wiphy should have REGULATORY_CUSTOM_REG\n");
1557 wiphy
->regulatory_flags
|= REGULATORY_CUSTOM_REG
;
1559 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++) {
1560 if (!wiphy
->bands
[band
])
1562 handle_band_custom(wiphy
, wiphy
->bands
[band
], regd
);
1567 * no point in calling this if it won't have any effect
1568 * on your device's supported bands.
1570 WARN_ON(!bands_set
);
1572 EXPORT_SYMBOL(wiphy_apply_custom_regulatory
);
1574 static void reg_set_request_processed(void)
1576 bool need_more_processing
= false;
1577 struct regulatory_request
*lr
= get_last_request();
1579 lr
->processed
= true;
1581 spin_lock(®_requests_lock
);
1582 if (!list_empty(®_requests_list
))
1583 need_more_processing
= true;
1584 spin_unlock(®_requests_lock
);
1586 if (lr
->initiator
== NL80211_REGDOM_SET_BY_USER
)
1587 cancel_delayed_work(®_timeout
);
1589 if (need_more_processing
)
1590 schedule_work(®_work
);
1594 * reg_process_hint_core - process core regulatory requests
1595 * @pending_request: a pending core regulatory request
1597 * The wireless subsystem can use this function to process
1598 * a regulatory request issued by the regulatory core.
1600 * Returns one of the different reg request treatment values.
1602 static enum reg_request_treatment
1603 reg_process_hint_core(struct regulatory_request
*core_request
)
1606 core_request
->intersect
= false;
1607 core_request
->processed
= false;
1609 reg_update_last_request(core_request
);
1611 return reg_call_crda(core_request
);
1614 static enum reg_request_treatment
1615 __reg_process_hint_user(struct regulatory_request
*user_request
)
1617 struct regulatory_request
*lr
= get_last_request();
1619 if (reg_request_indoor(user_request
)) {
1620 reg_is_indoor
= true;
1621 return REG_REQ_USER_HINT_HANDLED
;
1624 if (reg_request_cell_base(user_request
))
1625 return reg_ignore_cell_hint(user_request
);
1627 if (reg_request_cell_base(lr
))
1628 return REG_REQ_IGNORE
;
1630 if (lr
->initiator
== NL80211_REGDOM_SET_BY_COUNTRY_IE
)
1631 return REG_REQ_INTERSECT
;
1633 * If the user knows better the user should set the regdom
1634 * to their country before the IE is picked up
1636 if (lr
->initiator
== NL80211_REGDOM_SET_BY_USER
&&
1638 return REG_REQ_IGNORE
;
1640 * Process user requests only after previous user/driver/core
1641 * requests have been processed
1643 if ((lr
->initiator
== NL80211_REGDOM_SET_BY_CORE
||
1644 lr
->initiator
== NL80211_REGDOM_SET_BY_DRIVER
||
1645 lr
->initiator
== NL80211_REGDOM_SET_BY_USER
) &&
1646 regdom_changes(lr
->alpha2
))
1647 return REG_REQ_IGNORE
;
1649 if (!regdom_changes(user_request
->alpha2
))
1650 return REG_REQ_ALREADY_SET
;
1656 * reg_process_hint_user - process user regulatory requests
1657 * @user_request: a pending user regulatory request
1659 * The wireless subsystem can use this function to process
1660 * a regulatory request initiated by userspace.
1662 * Returns one of the different reg request treatment values.
1664 static enum reg_request_treatment
1665 reg_process_hint_user(struct regulatory_request
*user_request
)
1667 enum reg_request_treatment treatment
;
1669 treatment
= __reg_process_hint_user(user_request
);
1670 if (treatment
== REG_REQ_IGNORE
||
1671 treatment
== REG_REQ_ALREADY_SET
||
1672 treatment
== REG_REQ_USER_HINT_HANDLED
) {
1673 reg_free_request(user_request
);
1677 user_request
->intersect
= treatment
== REG_REQ_INTERSECT
;
1678 user_request
->processed
= false;
1680 reg_update_last_request(user_request
);
1682 user_alpha2
[0] = user_request
->alpha2
[0];
1683 user_alpha2
[1] = user_request
->alpha2
[1];
1685 return reg_call_crda(user_request
);
1688 static enum reg_request_treatment
1689 __reg_process_hint_driver(struct regulatory_request
*driver_request
)
1691 struct regulatory_request
*lr
= get_last_request();
1693 if (lr
->initiator
== NL80211_REGDOM_SET_BY_CORE
) {
1694 if (regdom_changes(driver_request
->alpha2
))
1696 return REG_REQ_ALREADY_SET
;
1700 * This would happen if you unplug and plug your card
1701 * back in or if you add a new device for which the previously
1702 * loaded card also agrees on the regulatory domain.
1704 if (lr
->initiator
== NL80211_REGDOM_SET_BY_DRIVER
&&
1705 !regdom_changes(driver_request
->alpha2
))
1706 return REG_REQ_ALREADY_SET
;
1708 return REG_REQ_INTERSECT
;
1712 * reg_process_hint_driver - process driver regulatory requests
1713 * @driver_request: a pending driver regulatory request
1715 * The wireless subsystem can use this function to process
1716 * a regulatory request issued by an 802.11 driver.
1718 * Returns one of the different reg request treatment values.
1720 static enum reg_request_treatment
1721 reg_process_hint_driver(struct wiphy
*wiphy
,
1722 struct regulatory_request
*driver_request
)
1724 const struct ieee80211_regdomain
*regd
;
1725 enum reg_request_treatment treatment
;
1727 treatment
= __reg_process_hint_driver(driver_request
);
1729 switch (treatment
) {
1732 case REG_REQ_IGNORE
:
1733 case REG_REQ_USER_HINT_HANDLED
:
1734 reg_free_request(driver_request
);
1736 case REG_REQ_INTERSECT
:
1738 case REG_REQ_ALREADY_SET
:
1739 regd
= reg_copy_regd(get_cfg80211_regdom());
1741 reg_free_request(driver_request
);
1742 return REG_REQ_IGNORE
;
1744 rcu_assign_pointer(wiphy
->regd
, regd
);
1748 driver_request
->intersect
= treatment
== REG_REQ_INTERSECT
;
1749 driver_request
->processed
= false;
1751 reg_update_last_request(driver_request
);
1754 * Since CRDA will not be called in this case as we already
1755 * have applied the requested regulatory domain before we just
1756 * inform userspace we have processed the request
1758 if (treatment
== REG_REQ_ALREADY_SET
) {
1759 nl80211_send_reg_change_event(driver_request
);
1760 reg_set_request_processed();
1764 return reg_call_crda(driver_request
);
1767 static enum reg_request_treatment
1768 __reg_process_hint_country_ie(struct wiphy
*wiphy
,
1769 struct regulatory_request
*country_ie_request
)
1771 struct wiphy
*last_wiphy
= NULL
;
1772 struct regulatory_request
*lr
= get_last_request();
1774 if (reg_request_cell_base(lr
)) {
1775 /* Trust a Cell base station over the AP's country IE */
1776 if (regdom_changes(country_ie_request
->alpha2
))
1777 return REG_REQ_IGNORE
;
1778 return REG_REQ_ALREADY_SET
;
1780 if (wiphy
->regulatory_flags
& REGULATORY_COUNTRY_IE_IGNORE
)
1781 return REG_REQ_IGNORE
;
1784 if (unlikely(!is_an_alpha2(country_ie_request
->alpha2
)))
1787 if (lr
->initiator
!= NL80211_REGDOM_SET_BY_COUNTRY_IE
)
1790 last_wiphy
= wiphy_idx_to_wiphy(lr
->wiphy_idx
);
1792 if (last_wiphy
!= wiphy
) {
1794 * Two cards with two APs claiming different
1795 * Country IE alpha2s. We could
1796 * intersect them, but that seems unlikely
1797 * to be correct. Reject second one for now.
1799 if (regdom_changes(country_ie_request
->alpha2
))
1800 return REG_REQ_IGNORE
;
1801 return REG_REQ_ALREADY_SET
;
1804 * Two consecutive Country IE hints on the same wiphy.
1805 * This should be picked up early by the driver/stack
1807 if (WARN_ON(regdom_changes(country_ie_request
->alpha2
)))
1809 return REG_REQ_ALREADY_SET
;
1813 * reg_process_hint_country_ie - process regulatory requests from country IEs
1814 * @country_ie_request: a regulatory request from a country IE
1816 * The wireless subsystem can use this function to process
1817 * a regulatory request issued by a country Information Element.
1819 * Returns one of the different reg request treatment values.
1821 static enum reg_request_treatment
1822 reg_process_hint_country_ie(struct wiphy
*wiphy
,
1823 struct regulatory_request
*country_ie_request
)
1825 enum reg_request_treatment treatment
;
1827 treatment
= __reg_process_hint_country_ie(wiphy
, country_ie_request
);
1829 switch (treatment
) {
1832 case REG_REQ_IGNORE
:
1833 case REG_REQ_USER_HINT_HANDLED
:
1835 case REG_REQ_ALREADY_SET
:
1836 reg_free_request(country_ie_request
);
1838 case REG_REQ_INTERSECT
:
1839 reg_free_request(country_ie_request
);
1841 * This doesn't happen yet, not sure we
1842 * ever want to support it for this case.
1844 WARN_ONCE(1, "Unexpected intersection for country IEs");
1845 return REG_REQ_IGNORE
;
1848 country_ie_request
->intersect
= false;
1849 country_ie_request
->processed
= false;
1851 reg_update_last_request(country_ie_request
);
1853 return reg_call_crda(country_ie_request
);
1856 /* This processes *all* regulatory hints */
1857 static void reg_process_hint(struct regulatory_request
*reg_request
)
1859 struct wiphy
*wiphy
= NULL
;
1860 enum reg_request_treatment treatment
;
1862 if (reg_request
->wiphy_idx
!= WIPHY_IDX_INVALID
)
1863 wiphy
= wiphy_idx_to_wiphy(reg_request
->wiphy_idx
);
1865 switch (reg_request
->initiator
) {
1866 case NL80211_REGDOM_SET_BY_CORE
:
1867 reg_process_hint_core(reg_request
);
1869 case NL80211_REGDOM_SET_BY_USER
:
1870 treatment
= reg_process_hint_user(reg_request
);
1871 if (treatment
== REG_REQ_IGNORE
||
1872 treatment
== REG_REQ_ALREADY_SET
||
1873 treatment
== REG_REQ_USER_HINT_HANDLED
)
1875 queue_delayed_work(system_power_efficient_wq
,
1876 ®_timeout
, msecs_to_jiffies(3142));
1878 case NL80211_REGDOM_SET_BY_DRIVER
:
1881 treatment
= reg_process_hint_driver(wiphy
, reg_request
);
1883 case NL80211_REGDOM_SET_BY_COUNTRY_IE
:
1886 treatment
= reg_process_hint_country_ie(wiphy
, reg_request
);
1889 WARN(1, "invalid initiator %d\n", reg_request
->initiator
);
1893 /* This is required so that the orig_* parameters are saved */
1894 if (treatment
== REG_REQ_ALREADY_SET
&& wiphy
&&
1895 wiphy
->regulatory_flags
& REGULATORY_STRICT_REG
)
1896 wiphy_update_regulatory(wiphy
, reg_request
->initiator
);
1901 reg_free_request(reg_request
);
1905 * Processes regulatory hints, this is all the NL80211_REGDOM_SET_BY_*
1906 * Regulatory hints come on a first come first serve basis and we
1907 * must process each one atomically.
1909 static void reg_process_pending_hints(void)
1911 struct regulatory_request
*reg_request
, *lr
;
1913 lr
= get_last_request();
1915 /* When last_request->processed becomes true this will be rescheduled */
1916 if (lr
&& !lr
->processed
) {
1917 reg_process_hint(lr
);
1921 spin_lock(®_requests_lock
);
1923 if (list_empty(®_requests_list
)) {
1924 spin_unlock(®_requests_lock
);
1928 reg_request
= list_first_entry(®_requests_list
,
1929 struct regulatory_request
,
1931 list_del_init(®_request
->list
);
1933 spin_unlock(®_requests_lock
);
1935 reg_process_hint(reg_request
);
1938 /* Processes beacon hints -- this has nothing to do with country IEs */
1939 static void reg_process_pending_beacon_hints(void)
1941 struct cfg80211_registered_device
*rdev
;
1942 struct reg_beacon
*pending_beacon
, *tmp
;
1944 /* This goes through the _pending_ beacon list */
1945 spin_lock_bh(®_pending_beacons_lock
);
1947 list_for_each_entry_safe(pending_beacon
, tmp
,
1948 ®_pending_beacons
, list
) {
1949 list_del_init(&pending_beacon
->list
);
1951 /* Applies the beacon hint to current wiphys */
1952 list_for_each_entry(rdev
, &cfg80211_rdev_list
, list
)
1953 wiphy_update_new_beacon(&rdev
->wiphy
, pending_beacon
);
1955 /* Remembers the beacon hint for new wiphys or reg changes */
1956 list_add_tail(&pending_beacon
->list
, ®_beacon_list
);
1959 spin_unlock_bh(®_pending_beacons_lock
);
1962 static void reg_todo(struct work_struct
*work
)
1965 reg_process_pending_hints();
1966 reg_process_pending_beacon_hints();
1970 static void queue_regulatory_request(struct regulatory_request
*request
)
1972 request
->alpha2
[0] = toupper(request
->alpha2
[0]);
1973 request
->alpha2
[1] = toupper(request
->alpha2
[1]);
1975 spin_lock(®_requests_lock
);
1976 list_add_tail(&request
->list
, ®_requests_list
);
1977 spin_unlock(®_requests_lock
);
1979 schedule_work(®_work
);
1983 * Core regulatory hint -- happens during cfg80211_init()
1984 * and when we restore regulatory settings.
1986 static int regulatory_hint_core(const char *alpha2
)
1988 struct regulatory_request
*request
;
1990 request
= kzalloc(sizeof(struct regulatory_request
), GFP_KERNEL
);
1994 request
->alpha2
[0] = alpha2
[0];
1995 request
->alpha2
[1] = alpha2
[1];
1996 request
->initiator
= NL80211_REGDOM_SET_BY_CORE
;
1998 queue_regulatory_request(request
);
2004 int regulatory_hint_user(const char *alpha2
,
2005 enum nl80211_user_reg_hint_type user_reg_hint_type
)
2007 struct regulatory_request
*request
;
2009 if (WARN_ON(!alpha2
))
2012 request
= kzalloc(sizeof(struct regulatory_request
), GFP_KERNEL
);
2016 request
->wiphy_idx
= WIPHY_IDX_INVALID
;
2017 request
->alpha2
[0] = alpha2
[0];
2018 request
->alpha2
[1] = alpha2
[1];
2019 request
->initiator
= NL80211_REGDOM_SET_BY_USER
;
2020 request
->user_reg_hint_type
= user_reg_hint_type
;
2022 queue_regulatory_request(request
);
2027 int regulatory_hint_indoor_user(void)
2029 struct regulatory_request
*request
;
2031 request
= kzalloc(sizeof(struct regulatory_request
), GFP_KERNEL
);
2035 request
->wiphy_idx
= WIPHY_IDX_INVALID
;
2036 request
->initiator
= NL80211_REGDOM_SET_BY_USER
;
2037 request
->user_reg_hint_type
= NL80211_USER_REG_HINT_INDOOR
;
2038 queue_regulatory_request(request
);
2044 int regulatory_hint(struct wiphy
*wiphy
, const char *alpha2
)
2046 struct regulatory_request
*request
;
2048 if (WARN_ON(!alpha2
|| !wiphy
))
2051 wiphy
->regulatory_flags
&= ~REGULATORY_CUSTOM_REG
;
2053 request
= kzalloc(sizeof(struct regulatory_request
), GFP_KERNEL
);
2057 request
->wiphy_idx
= get_wiphy_idx(wiphy
);
2059 request
->alpha2
[0] = alpha2
[0];
2060 request
->alpha2
[1] = alpha2
[1];
2061 request
->initiator
= NL80211_REGDOM_SET_BY_DRIVER
;
2063 queue_regulatory_request(request
);
2067 EXPORT_SYMBOL(regulatory_hint
);
2069 void regulatory_hint_country_ie(struct wiphy
*wiphy
, enum ieee80211_band band
,
2070 const u8
*country_ie
, u8 country_ie_len
)
2073 enum environment_cap env
= ENVIRON_ANY
;
2074 struct regulatory_request
*request
= NULL
, *lr
;
2076 /* IE len must be evenly divisible by 2 */
2077 if (country_ie_len
& 0x01)
2080 if (country_ie_len
< IEEE80211_COUNTRY_IE_MIN_LEN
)
2083 request
= kzalloc(sizeof(*request
), GFP_KERNEL
);
2087 alpha2
[0] = country_ie
[0];
2088 alpha2
[1] = country_ie
[1];
2090 if (country_ie
[2] == 'I')
2091 env
= ENVIRON_INDOOR
;
2092 else if (country_ie
[2] == 'O')
2093 env
= ENVIRON_OUTDOOR
;
2096 lr
= get_last_request();
2102 * We will run this only upon a successful connection on cfg80211.
2103 * We leave conflict resolution to the workqueue, where can hold
2106 if (lr
->initiator
== NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
2107 lr
->wiphy_idx
!= WIPHY_IDX_INVALID
)
2110 request
->wiphy_idx
= get_wiphy_idx(wiphy
);
2111 request
->alpha2
[0] = alpha2
[0];
2112 request
->alpha2
[1] = alpha2
[1];
2113 request
->initiator
= NL80211_REGDOM_SET_BY_COUNTRY_IE
;
2114 request
->country_ie_env
= env
;
2116 queue_regulatory_request(request
);
2123 static void restore_alpha2(char *alpha2
, bool reset_user
)
2125 /* indicates there is no alpha2 to consider for restoration */
2129 /* The user setting has precedence over the module parameter */
2130 if (is_user_regdom_saved()) {
2131 /* Unless we're asked to ignore it and reset it */
2133 REG_DBG_PRINT("Restoring regulatory settings including user preference\n");
2134 user_alpha2
[0] = '9';
2135 user_alpha2
[1] = '7';
2138 * If we're ignoring user settings, we still need to
2139 * check the module parameter to ensure we put things
2140 * back as they were for a full restore.
2142 if (!is_world_regdom(ieee80211_regdom
)) {
2143 REG_DBG_PRINT("Keeping preference on module parameter ieee80211_regdom: %c%c\n",
2144 ieee80211_regdom
[0], ieee80211_regdom
[1]);
2145 alpha2
[0] = ieee80211_regdom
[0];
2146 alpha2
[1] = ieee80211_regdom
[1];
2149 REG_DBG_PRINT("Restoring regulatory settings while preserving user preference for: %c%c\n",
2150 user_alpha2
[0], user_alpha2
[1]);
2151 alpha2
[0] = user_alpha2
[0];
2152 alpha2
[1] = user_alpha2
[1];
2154 } else if (!is_world_regdom(ieee80211_regdom
)) {
2155 REG_DBG_PRINT("Keeping preference on module parameter ieee80211_regdom: %c%c\n",
2156 ieee80211_regdom
[0], ieee80211_regdom
[1]);
2157 alpha2
[0] = ieee80211_regdom
[0];
2158 alpha2
[1] = ieee80211_regdom
[1];
2160 REG_DBG_PRINT("Restoring regulatory settings\n");
2163 static void restore_custom_reg_settings(struct wiphy
*wiphy
)
2165 struct ieee80211_supported_band
*sband
;
2166 enum ieee80211_band band
;
2167 struct ieee80211_channel
*chan
;
2170 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++) {
2171 sband
= wiphy
->bands
[band
];
2174 for (i
= 0; i
< sband
->n_channels
; i
++) {
2175 chan
= &sband
->channels
[i
];
2176 chan
->flags
= chan
->orig_flags
;
2177 chan
->max_antenna_gain
= chan
->orig_mag
;
2178 chan
->max_power
= chan
->orig_mpwr
;
2179 chan
->beacon_found
= false;
2185 * Restoring regulatory settings involves ingoring any
2186 * possibly stale country IE information and user regulatory
2187 * settings if so desired, this includes any beacon hints
2188 * learned as we could have traveled outside to another country
2189 * after disconnection. To restore regulatory settings we do
2190 * exactly what we did at bootup:
2192 * - send a core regulatory hint
2193 * - send a user regulatory hint if applicable
2195 * Device drivers that send a regulatory hint for a specific country
2196 * keep their own regulatory domain on wiphy->regd so that does does
2197 * not need to be remembered.
2199 static void restore_regulatory_settings(bool reset_user
)
2202 char world_alpha2
[2];
2203 struct reg_beacon
*reg_beacon
, *btmp
;
2204 struct regulatory_request
*reg_request
, *tmp
;
2205 LIST_HEAD(tmp_reg_req_list
);
2206 struct cfg80211_registered_device
*rdev
;
2210 reg_is_indoor
= false;
2212 reset_regdomains(true, &world_regdom
);
2213 restore_alpha2(alpha2
, reset_user
);
2216 * If there's any pending requests we simply
2217 * stash them to a temporary pending queue and
2218 * add then after we've restored regulatory
2221 spin_lock(®_requests_lock
);
2222 list_for_each_entry_safe(reg_request
, tmp
, ®_requests_list
, list
) {
2223 if (reg_request
->initiator
!= NL80211_REGDOM_SET_BY_USER
)
2225 list_move_tail(®_request
->list
, &tmp_reg_req_list
);
2227 spin_unlock(®_requests_lock
);
2229 /* Clear beacon hints */
2230 spin_lock_bh(®_pending_beacons_lock
);
2231 list_for_each_entry_safe(reg_beacon
, btmp
, ®_pending_beacons
, list
) {
2232 list_del(®_beacon
->list
);
2235 spin_unlock_bh(®_pending_beacons_lock
);
2237 list_for_each_entry_safe(reg_beacon
, btmp
, ®_beacon_list
, list
) {
2238 list_del(®_beacon
->list
);
2242 /* First restore to the basic regulatory settings */
2243 world_alpha2
[0] = cfg80211_world_regdom
->alpha2
[0];
2244 world_alpha2
[1] = cfg80211_world_regdom
->alpha2
[1];
2246 list_for_each_entry(rdev
, &cfg80211_rdev_list
, list
) {
2247 if (rdev
->wiphy
.regulatory_flags
& REGULATORY_CUSTOM_REG
)
2248 restore_custom_reg_settings(&rdev
->wiphy
);
2251 regulatory_hint_core(world_alpha2
);
2254 * This restores the ieee80211_regdom module parameter
2255 * preference or the last user requested regulatory
2256 * settings, user regulatory settings takes precedence.
2258 if (is_an_alpha2(alpha2
))
2259 regulatory_hint_user(user_alpha2
, NL80211_USER_REG_HINT_USER
);
2261 spin_lock(®_requests_lock
);
2262 list_splice_tail_init(&tmp_reg_req_list
, ®_requests_list
);
2263 spin_unlock(®_requests_lock
);
2265 REG_DBG_PRINT("Kicking the queue\n");
2267 schedule_work(®_work
);
2270 void regulatory_hint_disconnect(void)
2272 REG_DBG_PRINT("All devices are disconnected, going to restore regulatory settings\n");
2273 restore_regulatory_settings(false);
2276 static bool freq_is_chan_12_13_14(u16 freq
)
2278 if (freq
== ieee80211_channel_to_frequency(12, IEEE80211_BAND_2GHZ
) ||
2279 freq
== ieee80211_channel_to_frequency(13, IEEE80211_BAND_2GHZ
) ||
2280 freq
== ieee80211_channel_to_frequency(14, IEEE80211_BAND_2GHZ
))
2285 static bool pending_reg_beacon(struct ieee80211_channel
*beacon_chan
)
2287 struct reg_beacon
*pending_beacon
;
2289 list_for_each_entry(pending_beacon
, ®_pending_beacons
, list
)
2290 if (beacon_chan
->center_freq
==
2291 pending_beacon
->chan
.center_freq
)
2296 int regulatory_hint_found_beacon(struct wiphy
*wiphy
,
2297 struct ieee80211_channel
*beacon_chan
,
2300 struct reg_beacon
*reg_beacon
;
2303 if (beacon_chan
->beacon_found
||
2304 beacon_chan
->flags
& IEEE80211_CHAN_RADAR
||
2305 (beacon_chan
->band
== IEEE80211_BAND_2GHZ
&&
2306 !freq_is_chan_12_13_14(beacon_chan
->center_freq
)))
2309 spin_lock_bh(®_pending_beacons_lock
);
2310 processing
= pending_reg_beacon(beacon_chan
);
2311 spin_unlock_bh(®_pending_beacons_lock
);
2316 reg_beacon
= kzalloc(sizeof(struct reg_beacon
), gfp
);
2320 REG_DBG_PRINT("Found new beacon on frequency: %d MHz (Ch %d) on %s\n",
2321 beacon_chan
->center_freq
,
2322 ieee80211_frequency_to_channel(beacon_chan
->center_freq
),
2325 memcpy(®_beacon
->chan
, beacon_chan
,
2326 sizeof(struct ieee80211_channel
));
2329 * Since we can be called from BH or and non-BH context
2330 * we must use spin_lock_bh()
2332 spin_lock_bh(®_pending_beacons_lock
);
2333 list_add_tail(®_beacon
->list
, ®_pending_beacons
);
2334 spin_unlock_bh(®_pending_beacons_lock
);
2336 schedule_work(®_work
);
2341 static void print_rd_rules(const struct ieee80211_regdomain
*rd
)
2344 const struct ieee80211_reg_rule
*reg_rule
= NULL
;
2345 const struct ieee80211_freq_range
*freq_range
= NULL
;
2346 const struct ieee80211_power_rule
*power_rule
= NULL
;
2347 char bw
[32], cac_time
[32];
2349 pr_info(" (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp), (dfs_cac_time)\n");
2351 for (i
= 0; i
< rd
->n_reg_rules
; i
++) {
2352 reg_rule
= &rd
->reg_rules
[i
];
2353 freq_range
= ®_rule
->freq_range
;
2354 power_rule
= ®_rule
->power_rule
;
2356 if (reg_rule
->flags
& NL80211_RRF_AUTO_BW
)
2357 snprintf(bw
, sizeof(bw
), "%d KHz, %d KHz AUTO",
2358 freq_range
->max_bandwidth_khz
,
2359 reg_get_max_bandwidth(rd
, reg_rule
));
2361 snprintf(bw
, sizeof(bw
), "%d KHz",
2362 freq_range
->max_bandwidth_khz
);
2364 if (reg_rule
->flags
& NL80211_RRF_DFS
)
2365 scnprintf(cac_time
, sizeof(cac_time
), "%u s",
2366 reg_rule
->dfs_cac_ms
/1000);
2368 scnprintf(cac_time
, sizeof(cac_time
), "N/A");
2372 * There may not be documentation for max antenna gain
2373 * in certain regions
2375 if (power_rule
->max_antenna_gain
)
2376 pr_info(" (%d KHz - %d KHz @ %s), (%d mBi, %d mBm), (%s)\n",
2377 freq_range
->start_freq_khz
,
2378 freq_range
->end_freq_khz
,
2380 power_rule
->max_antenna_gain
,
2381 power_rule
->max_eirp
,
2384 pr_info(" (%d KHz - %d KHz @ %s), (N/A, %d mBm), (%s)\n",
2385 freq_range
->start_freq_khz
,
2386 freq_range
->end_freq_khz
,
2388 power_rule
->max_eirp
,
2393 bool reg_supported_dfs_region(enum nl80211_dfs_regions dfs_region
)
2395 switch (dfs_region
) {
2396 case NL80211_DFS_UNSET
:
2397 case NL80211_DFS_FCC
:
2398 case NL80211_DFS_ETSI
:
2399 case NL80211_DFS_JP
:
2402 REG_DBG_PRINT("Ignoring uknown DFS master region: %d\n",
2408 static void print_regdomain(const struct ieee80211_regdomain
*rd
)
2410 struct regulatory_request
*lr
= get_last_request();
2412 if (is_intersected_alpha2(rd
->alpha2
)) {
2413 if (lr
->initiator
== NL80211_REGDOM_SET_BY_COUNTRY_IE
) {
2414 struct cfg80211_registered_device
*rdev
;
2415 rdev
= cfg80211_rdev_by_wiphy_idx(lr
->wiphy_idx
);
2417 pr_info("Current regulatory domain updated by AP to: %c%c\n",
2418 rdev
->country_ie_alpha2
[0],
2419 rdev
->country_ie_alpha2
[1]);
2421 pr_info("Current regulatory domain intersected:\n");
2423 pr_info("Current regulatory domain intersected:\n");
2424 } else if (is_world_regdom(rd
->alpha2
)) {
2425 pr_info("World regulatory domain updated:\n");
2427 if (is_unknown_alpha2(rd
->alpha2
))
2428 pr_info("Regulatory domain changed to driver built-in settings (unknown country)\n");
2430 if (reg_request_cell_base(lr
))
2431 pr_info("Regulatory domain changed to country: %c%c by Cell Station\n",
2432 rd
->alpha2
[0], rd
->alpha2
[1]);
2434 pr_info("Regulatory domain changed to country: %c%c\n",
2435 rd
->alpha2
[0], rd
->alpha2
[1]);
2439 pr_info(" DFS Master region: %s", reg_dfs_region_str(rd
->dfs_region
));
2443 static void print_regdomain_info(const struct ieee80211_regdomain
*rd
)
2445 pr_info("Regulatory domain: %c%c\n", rd
->alpha2
[0], rd
->alpha2
[1]);
2449 static int reg_set_rd_core(const struct ieee80211_regdomain
*rd
)
2451 if (!is_world_regdom(rd
->alpha2
))
2453 update_world_regdomain(rd
);
2457 static int reg_set_rd_user(const struct ieee80211_regdomain
*rd
,
2458 struct regulatory_request
*user_request
)
2460 const struct ieee80211_regdomain
*intersected_rd
= NULL
;
2462 if (!regdom_changes(rd
->alpha2
))
2465 if (!is_valid_rd(rd
)) {
2466 pr_err("Invalid regulatory domain detected:\n");
2467 print_regdomain_info(rd
);
2471 if (!user_request
->intersect
) {
2472 reset_regdomains(false, rd
);
2476 intersected_rd
= regdom_intersect(rd
, get_cfg80211_regdom());
2477 if (!intersected_rd
)
2482 reset_regdomains(false, intersected_rd
);
2487 static int reg_set_rd_driver(const struct ieee80211_regdomain
*rd
,
2488 struct regulatory_request
*driver_request
)
2490 const struct ieee80211_regdomain
*regd
;
2491 const struct ieee80211_regdomain
*intersected_rd
= NULL
;
2492 const struct ieee80211_regdomain
*tmp
;
2493 struct wiphy
*request_wiphy
;
2495 if (is_world_regdom(rd
->alpha2
))
2498 if (!regdom_changes(rd
->alpha2
))
2501 if (!is_valid_rd(rd
)) {
2502 pr_err("Invalid regulatory domain detected:\n");
2503 print_regdomain_info(rd
);
2507 request_wiphy
= wiphy_idx_to_wiphy(driver_request
->wiphy_idx
);
2508 if (!request_wiphy
) {
2509 queue_delayed_work(system_power_efficient_wq
,
2514 if (!driver_request
->intersect
) {
2515 if (request_wiphy
->regd
)
2518 regd
= reg_copy_regd(rd
);
2520 return PTR_ERR(regd
);
2522 rcu_assign_pointer(request_wiphy
->regd
, regd
);
2523 reset_regdomains(false, rd
);
2527 intersected_rd
= regdom_intersect(rd
, get_cfg80211_regdom());
2528 if (!intersected_rd
)
2532 * We can trash what CRDA provided now.
2533 * However if a driver requested this specific regulatory
2534 * domain we keep it for its private use
2536 tmp
= get_wiphy_regdom(request_wiphy
);
2537 rcu_assign_pointer(request_wiphy
->regd
, rd
);
2538 rcu_free_regdom(tmp
);
2542 reset_regdomains(false, intersected_rd
);
2547 static int reg_set_rd_country_ie(const struct ieee80211_regdomain
*rd
,
2548 struct regulatory_request
*country_ie_request
)
2550 struct wiphy
*request_wiphy
;
2552 if (!is_alpha2_set(rd
->alpha2
) && !is_an_alpha2(rd
->alpha2
) &&
2553 !is_unknown_alpha2(rd
->alpha2
))
2557 * Lets only bother proceeding on the same alpha2 if the current
2558 * rd is non static (it means CRDA was present and was used last)
2559 * and the pending request came in from a country IE
2562 if (!is_valid_rd(rd
)) {
2563 pr_err("Invalid regulatory domain detected:\n");
2564 print_regdomain_info(rd
);
2568 request_wiphy
= wiphy_idx_to_wiphy(country_ie_request
->wiphy_idx
);
2569 if (!request_wiphy
) {
2570 queue_delayed_work(system_power_efficient_wq
,
2575 if (country_ie_request
->intersect
)
2578 reset_regdomains(false, rd
);
2583 * Use this call to set the current regulatory domain. Conflicts with
2584 * multiple drivers can be ironed out later. Caller must've already
2585 * kmalloc'd the rd structure.
2587 int set_regdom(const struct ieee80211_regdomain
*rd
)
2589 struct regulatory_request
*lr
;
2590 bool user_reset
= false;
2593 if (!reg_is_valid_request(rd
->alpha2
)) {
2598 lr
= get_last_request();
2600 /* Note that this doesn't update the wiphys, this is done below */
2601 switch (lr
->initiator
) {
2602 case NL80211_REGDOM_SET_BY_CORE
:
2603 r
= reg_set_rd_core(rd
);
2605 case NL80211_REGDOM_SET_BY_USER
:
2606 r
= reg_set_rd_user(rd
, lr
);
2609 case NL80211_REGDOM_SET_BY_DRIVER
:
2610 r
= reg_set_rd_driver(rd
, lr
);
2612 case NL80211_REGDOM_SET_BY_COUNTRY_IE
:
2613 r
= reg_set_rd_country_ie(rd
, lr
);
2616 WARN(1, "invalid initiator %d\n", lr
->initiator
);
2623 reg_set_request_processed();
2626 /* Back to world regulatory in case of errors */
2627 restore_regulatory_settings(user_reset
);
2634 /* This would make this whole thing pointless */
2635 if (WARN_ON(!lr
->intersect
&& rd
!= get_cfg80211_regdom()))
2638 /* update all wiphys now with the new established regulatory domain */
2639 update_all_wiphy_regulatory(lr
->initiator
);
2641 print_regdomain(get_cfg80211_regdom());
2643 nl80211_send_reg_change_event(lr
);
2645 reg_set_request_processed();
2650 void wiphy_regulatory_register(struct wiphy
*wiphy
)
2652 struct regulatory_request
*lr
;
2654 if (!reg_dev_ignore_cell_hint(wiphy
))
2655 reg_num_devs_support_basehint
++;
2657 lr
= get_last_request();
2658 wiphy_update_regulatory(wiphy
, lr
->initiator
);
2661 void wiphy_regulatory_deregister(struct wiphy
*wiphy
)
2663 struct wiphy
*request_wiphy
= NULL
;
2664 struct regulatory_request
*lr
;
2666 lr
= get_last_request();
2668 if (!reg_dev_ignore_cell_hint(wiphy
))
2669 reg_num_devs_support_basehint
--;
2671 rcu_free_regdom(get_wiphy_regdom(wiphy
));
2672 RCU_INIT_POINTER(wiphy
->regd
, NULL
);
2675 request_wiphy
= wiphy_idx_to_wiphy(lr
->wiphy_idx
);
2677 if (!request_wiphy
|| request_wiphy
!= wiphy
)
2680 lr
->wiphy_idx
= WIPHY_IDX_INVALID
;
2681 lr
->country_ie_env
= ENVIRON_ANY
;
2684 static void reg_timeout_work(struct work_struct
*work
)
2686 REG_DBG_PRINT("Timeout while waiting for CRDA to reply, restoring regulatory settings\n");
2688 restore_regulatory_settings(true);
2693 * See http://www.fcc.gov/document/5-ghz-unlicensed-spectrum-unii, for
2694 * UNII band definitions
2696 int cfg80211_get_unii(int freq
)
2699 if (freq
>= 5150 && freq
<= 5250)
2703 if (freq
> 5250 && freq
<= 5350)
2707 if (freq
> 5350 && freq
<= 5470)
2711 if (freq
> 5470 && freq
<= 5725)
2715 if (freq
> 5725 && freq
<= 5825)
2721 bool regulatory_indoor_allowed(void)
2723 return reg_is_indoor
;
2726 int __init
regulatory_init(void)
2730 reg_pdev
= platform_device_register_simple("regulatory", 0, NULL
, 0);
2731 if (IS_ERR(reg_pdev
))
2732 return PTR_ERR(reg_pdev
);
2734 spin_lock_init(®_requests_lock
);
2735 spin_lock_init(®_pending_beacons_lock
);
2737 reg_regdb_size_check();
2739 rcu_assign_pointer(cfg80211_regdomain
, cfg80211_world_regdom
);
2741 user_alpha2
[0] = '9';
2742 user_alpha2
[1] = '7';
2744 /* We always try to get an update for the static regdomain */
2745 err
= regulatory_hint_core(cfg80211_world_regdom
->alpha2
);
2750 * N.B. kobject_uevent_env() can fail mainly for when we're out
2751 * memory which is handled and propagated appropriately above
2752 * but it can also fail during a netlink_broadcast() or during
2753 * early boot for call_usermodehelper(). For now treat these
2754 * errors as non-fatal.
2756 pr_err("kobject_uevent_env() was unable to call CRDA during init\n");
2760 * Finally, if the user set the module parameter treat it
2763 if (!is_world_regdom(ieee80211_regdom
))
2764 regulatory_hint_user(ieee80211_regdom
,
2765 NL80211_USER_REG_HINT_USER
);
2770 void regulatory_exit(void)
2772 struct regulatory_request
*reg_request
, *tmp
;
2773 struct reg_beacon
*reg_beacon
, *btmp
;
2775 cancel_work_sync(®_work
);
2776 cancel_delayed_work_sync(®_timeout
);
2778 /* Lock to suppress warnings */
2780 reset_regdomains(true, NULL
);
2783 dev_set_uevent_suppress(®_pdev
->dev
, true);
2785 platform_device_unregister(reg_pdev
);
2787 list_for_each_entry_safe(reg_beacon
, btmp
, ®_pending_beacons
, list
) {
2788 list_del(®_beacon
->list
);
2792 list_for_each_entry_safe(reg_beacon
, btmp
, ®_beacon_list
, list
) {
2793 list_del(®_beacon
->list
);
2797 list_for_each_entry_safe(reg_request
, tmp
, ®_requests_list
, list
) {
2798 list_del(®_request
->list
);