2 * Copyright 2002-2005, Instant802 Networks, Inc.
3 * Copyright 2005-2006, Devicescape Software, Inc.
4 * Copyright 2007 Johannes Berg <johannes@sipsolutions.net>
5 * Copyright 2008-2011 Luis R. Rodriguez <mcgrof@qca.qualcomm.com>
6 * Copyright 2013-2014 Intel Mobile Communications GmbH
8 * Permission to use, copy, modify, and/or distribute this software for any
9 * purpose with or without fee is hereby granted, provided that the above
10 * copyright notice and this permission notice appear in all copies.
12 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
13 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
14 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
15 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
16 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
17 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
18 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
23 * DOC: Wireless regulatory infrastructure
25 * The usual implementation is for a driver to read a device EEPROM to
26 * determine which regulatory domain it should be operating under, then
27 * looking up the allowable channels in a driver-local table and finally
28 * registering those channels in the wiphy structure.
30 * Another set of compliance enforcement is for drivers to use their
31 * own compliance limits which can be stored on the EEPROM. The host
32 * driver or firmware may ensure these are used.
34 * In addition to all this we provide an extra layer of regulatory
35 * conformance. For drivers which do not have any regulatory
36 * information CRDA provides the complete regulatory solution.
37 * For others it provides a community effort on further restrictions
38 * to enhance compliance.
40 * Note: When number of rules --> infinity we will not be able to
41 * index on alpha2 any more, instead we'll probably have to
42 * rely on some SHA1 checksum of the regdomain for example.
46 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
48 #include <linux/kernel.h>
49 #include <linux/export.h>
50 #include <linux/slab.h>
51 #include <linux/list.h>
52 #include <linux/ctype.h>
53 #include <linux/nl80211.h>
54 #include <linux/platform_device.h>
55 #include <linux/moduleparam.h>
56 #include <net/cfg80211.h>
63 #ifdef CONFIG_CFG80211_REG_DEBUG
64 #define REG_DBG_PRINT(format, args...) \
65 printk(KERN_DEBUG pr_fmt(format), ##args)
67 #define REG_DBG_PRINT(args...)
71 * Grace period we give before making sure all current interfaces reside on
72 * channels allowed by the current regulatory domain.
74 #define REG_ENFORCE_GRACE_MS 60000
77 * enum reg_request_treatment - regulatory request treatment
79 * @REG_REQ_OK: continue processing the regulatory request
80 * @REG_REQ_IGNORE: ignore the regulatory request
81 * @REG_REQ_INTERSECT: the regulatory domain resulting from this request should
82 * be intersected with the current one.
83 * @REG_REQ_ALREADY_SET: the regulatory request will not change the current
84 * regulatory settings, and no further processing is required.
86 enum reg_request_treatment
{
93 static struct regulatory_request core_request_world
= {
94 .initiator
= NL80211_REGDOM_SET_BY_CORE
,
99 .country_ie_env
= ENVIRON_ANY
,
103 * Receipt of information from last regulatory request,
104 * protected by RTNL (and can be accessed with RCU protection)
106 static struct regulatory_request __rcu
*last_request
=
107 (void __force __rcu
*)&core_request_world
;
109 /* To trigger userspace events */
110 static struct platform_device
*reg_pdev
;
113 * Central wireless core regulatory domains, we only need two,
114 * the current one and a world regulatory domain in case we have no
115 * information to give us an alpha2.
116 * (protected by RTNL, can be read under RCU)
118 const struct ieee80211_regdomain __rcu
*cfg80211_regdomain
;
121 * Number of devices that registered to the core
122 * that support cellular base station regulatory hints
123 * (protected by RTNL)
125 static int reg_num_devs_support_basehint
;
128 * State variable indicating if the platform on which the devices
129 * are attached is operating in an indoor environment. The state variable
130 * is relevant for all registered devices.
132 static bool reg_is_indoor
;
133 static spinlock_t reg_indoor_lock
;
135 /* Used to track the userspace process controlling the indoor setting */
136 static u32 reg_is_indoor_portid
;
138 /* Max number of consecutive attempts to communicate with CRDA */
139 #define REG_MAX_CRDA_TIMEOUTS 10
141 static u32 reg_crda_timeouts
;
143 static const struct ieee80211_regdomain
*get_cfg80211_regdom(void)
145 return rtnl_dereference(cfg80211_regdomain
);
148 const struct ieee80211_regdomain
*get_wiphy_regdom(struct wiphy
*wiphy
)
150 return rtnl_dereference(wiphy
->regd
);
153 static const char *reg_dfs_region_str(enum nl80211_dfs_regions dfs_region
)
155 switch (dfs_region
) {
156 case NL80211_DFS_UNSET
:
158 case NL80211_DFS_FCC
:
160 case NL80211_DFS_ETSI
:
168 enum nl80211_dfs_regions
reg_get_dfs_region(struct wiphy
*wiphy
)
170 const struct ieee80211_regdomain
*regd
= NULL
;
171 const struct ieee80211_regdomain
*wiphy_regd
= NULL
;
173 regd
= get_cfg80211_regdom();
177 wiphy_regd
= get_wiphy_regdom(wiphy
);
181 if (wiphy_regd
->dfs_region
== regd
->dfs_region
)
184 REG_DBG_PRINT("%s: device specific dfs_region "
185 "(%s) disagrees with cfg80211's "
186 "central dfs_region (%s)\n",
187 dev_name(&wiphy
->dev
),
188 reg_dfs_region_str(wiphy_regd
->dfs_region
),
189 reg_dfs_region_str(regd
->dfs_region
));
192 return regd
->dfs_region
;
195 static void rcu_free_regdom(const struct ieee80211_regdomain
*r
)
199 kfree_rcu((struct ieee80211_regdomain
*)r
, rcu_head
);
202 static struct regulatory_request
*get_last_request(void)
204 return rcu_dereference_rtnl(last_request
);
207 /* Used to queue up regulatory hints */
208 static LIST_HEAD(reg_requests_list
);
209 static spinlock_t reg_requests_lock
;
211 /* Used to queue up beacon hints for review */
212 static LIST_HEAD(reg_pending_beacons
);
213 static spinlock_t reg_pending_beacons_lock
;
215 /* Used to keep track of processed beacon hints */
216 static LIST_HEAD(reg_beacon_list
);
219 struct list_head list
;
220 struct ieee80211_channel chan
;
223 static void reg_check_chans_work(struct work_struct
*work
);
224 static DECLARE_DELAYED_WORK(reg_check_chans
, reg_check_chans_work
);
226 static void reg_todo(struct work_struct
*work
);
227 static DECLARE_WORK(reg_work
, reg_todo
);
229 static void reg_timeout_work(struct work_struct
*work
);
230 static DECLARE_DELAYED_WORK(reg_timeout
, reg_timeout_work
);
232 /* We keep a static world regulatory domain in case of the absence of CRDA */
233 static const struct ieee80211_regdomain world_regdom
= {
237 /* IEEE 802.11b/g, channels 1..11 */
238 REG_RULE(2412-10, 2462+10, 40, 6, 20, 0),
239 /* IEEE 802.11b/g, channels 12..13. */
240 REG_RULE(2467-10, 2472+10, 40, 6, 20,
242 /* IEEE 802.11 channel 14 - Only JP enables
243 * this and for 802.11b only */
244 REG_RULE(2484-10, 2484+10, 20, 6, 20,
246 NL80211_RRF_NO_OFDM
),
247 /* IEEE 802.11a, channel 36..48 */
248 REG_RULE(5180-10, 5240+10, 160, 6, 20,
251 /* IEEE 802.11a, channel 52..64 - DFS required */
252 REG_RULE(5260-10, 5320+10, 160, 6, 20,
256 /* IEEE 802.11a, channel 100..144 - DFS required */
257 REG_RULE(5500-10, 5720+10, 160, 6, 20,
261 /* IEEE 802.11a, channel 149..165 */
262 REG_RULE(5745-10, 5825+10, 80, 6, 20,
265 /* IEEE 802.11ad (60GHz), channels 1..3 */
266 REG_RULE(56160+2160*1-1080, 56160+2160*3+1080, 2160, 0, 0, 0),
270 /* protected by RTNL */
271 static const struct ieee80211_regdomain
*cfg80211_world_regdom
=
274 static char *ieee80211_regdom
= "00";
275 static char user_alpha2
[2];
277 module_param(ieee80211_regdom
, charp
, 0444);
278 MODULE_PARM_DESC(ieee80211_regdom
, "IEEE 802.11 regulatory domain code");
280 static void reg_free_request(struct regulatory_request
*request
)
282 if (request
!= get_last_request())
286 static void reg_free_last_request(void)
288 struct regulatory_request
*lr
= get_last_request();
290 if (lr
!= &core_request_world
&& lr
)
291 kfree_rcu(lr
, rcu_head
);
294 static void reg_update_last_request(struct regulatory_request
*request
)
296 struct regulatory_request
*lr
;
298 lr
= get_last_request();
302 reg_free_last_request();
303 rcu_assign_pointer(last_request
, request
);
306 static void reset_regdomains(bool full_reset
,
307 const struct ieee80211_regdomain
*new_regdom
)
309 const struct ieee80211_regdomain
*r
;
313 r
= get_cfg80211_regdom();
315 /* avoid freeing static information or freeing something twice */
316 if (r
== cfg80211_world_regdom
)
318 if (cfg80211_world_regdom
== &world_regdom
)
319 cfg80211_world_regdom
= NULL
;
320 if (r
== &world_regdom
)
324 rcu_free_regdom(cfg80211_world_regdom
);
326 cfg80211_world_regdom
= &world_regdom
;
327 rcu_assign_pointer(cfg80211_regdomain
, new_regdom
);
332 reg_update_last_request(&core_request_world
);
336 * Dynamic world regulatory domain requested by the wireless
337 * core upon initialization
339 static void update_world_regdomain(const struct ieee80211_regdomain
*rd
)
341 struct regulatory_request
*lr
;
343 lr
= get_last_request();
347 reset_regdomains(false, rd
);
349 cfg80211_world_regdom
= rd
;
352 bool is_world_regdom(const char *alpha2
)
356 return alpha2
[0] == '0' && alpha2
[1] == '0';
359 static bool is_alpha2_set(const char *alpha2
)
363 return alpha2
[0] && alpha2
[1];
366 static bool is_unknown_alpha2(const char *alpha2
)
371 * Special case where regulatory domain was built by driver
372 * but a specific alpha2 cannot be determined
374 return alpha2
[0] == '9' && alpha2
[1] == '9';
377 static bool is_intersected_alpha2(const char *alpha2
)
382 * Special case where regulatory domain is the
383 * result of an intersection between two regulatory domain
386 return alpha2
[0] == '9' && alpha2
[1] == '8';
389 static bool is_an_alpha2(const char *alpha2
)
393 return isalpha(alpha2
[0]) && isalpha(alpha2
[1]);
396 static bool alpha2_equal(const char *alpha2_x
, const char *alpha2_y
)
398 if (!alpha2_x
|| !alpha2_y
)
400 return alpha2_x
[0] == alpha2_y
[0] && alpha2_x
[1] == alpha2_y
[1];
403 static bool regdom_changes(const char *alpha2
)
405 const struct ieee80211_regdomain
*r
= get_cfg80211_regdom();
409 return !alpha2_equal(r
->alpha2
, alpha2
);
413 * The NL80211_REGDOM_SET_BY_USER regdom alpha2 is cached, this lets
414 * you know if a valid regulatory hint with NL80211_REGDOM_SET_BY_USER
415 * has ever been issued.
417 static bool is_user_regdom_saved(void)
419 if (user_alpha2
[0] == '9' && user_alpha2
[1] == '7')
422 /* This would indicate a mistake on the design */
423 if (WARN(!is_world_regdom(user_alpha2
) && !is_an_alpha2(user_alpha2
),
424 "Unexpected user alpha2: %c%c\n",
425 user_alpha2
[0], user_alpha2
[1]))
431 static const struct ieee80211_regdomain
*
432 reg_copy_regd(const struct ieee80211_regdomain
*src_regd
)
434 struct ieee80211_regdomain
*regd
;
439 sizeof(struct ieee80211_regdomain
) +
440 src_regd
->n_reg_rules
* sizeof(struct ieee80211_reg_rule
);
442 regd
= kzalloc(size_of_regd
, GFP_KERNEL
);
444 return ERR_PTR(-ENOMEM
);
446 memcpy(regd
, src_regd
, sizeof(struct ieee80211_regdomain
));
448 for (i
= 0; i
< src_regd
->n_reg_rules
; i
++)
449 memcpy(®d
->reg_rules
[i
], &src_regd
->reg_rules
[i
],
450 sizeof(struct ieee80211_reg_rule
));
455 #ifdef CONFIG_CFG80211_INTERNAL_REGDB
456 struct reg_regdb_apply_request
{
457 struct list_head list
;
458 const struct ieee80211_regdomain
*regdom
;
461 static LIST_HEAD(reg_regdb_apply_list
);
462 static DEFINE_MUTEX(reg_regdb_apply_mutex
);
464 static void reg_regdb_apply(struct work_struct
*work
)
466 struct reg_regdb_apply_request
*request
;
470 mutex_lock(®_regdb_apply_mutex
);
471 while (!list_empty(®_regdb_apply_list
)) {
472 request
= list_first_entry(®_regdb_apply_list
,
473 struct reg_regdb_apply_request
,
475 list_del(&request
->list
);
477 set_regdom(request
->regdom
, REGD_SOURCE_INTERNAL_DB
);
480 mutex_unlock(®_regdb_apply_mutex
);
485 static DECLARE_WORK(reg_regdb_work
, reg_regdb_apply
);
487 static int reg_regdb_query(const char *alpha2
)
489 const struct ieee80211_regdomain
*regdom
= NULL
;
490 struct reg_regdb_apply_request
*request
;
493 for (i
= 0; i
< reg_regdb_size
; i
++) {
494 if (alpha2_equal(alpha2
, reg_regdb
[i
]->alpha2
)) {
495 regdom
= reg_regdb
[i
];
503 request
= kzalloc(sizeof(struct reg_regdb_apply_request
), GFP_KERNEL
);
507 request
->regdom
= reg_copy_regd(regdom
);
508 if (IS_ERR_OR_NULL(request
->regdom
)) {
513 mutex_lock(®_regdb_apply_mutex
);
514 list_add_tail(&request
->list
, ®_regdb_apply_list
);
515 mutex_unlock(®_regdb_apply_mutex
);
517 schedule_work(®_regdb_work
);
522 /* Feel free to add any other sanity checks here */
523 static void reg_regdb_size_check(void)
525 /* We should ideally BUILD_BUG_ON() but then random builds would fail */
526 WARN_ONCE(!reg_regdb_size
, "db.txt is empty, you should update it...");
529 static inline void reg_regdb_size_check(void) {}
530 static inline int reg_regdb_query(const char *alpha2
)
534 #endif /* CONFIG_CFG80211_INTERNAL_REGDB */
537 * This lets us keep regulatory code which is updated on a regulatory
538 * basis in userspace.
540 static int call_crda(const char *alpha2
)
543 char *env
[] = { country
, NULL
};
546 snprintf(country
, sizeof(country
), "COUNTRY=%c%c",
547 alpha2
[0], alpha2
[1]);
549 if (reg_crda_timeouts
> REG_MAX_CRDA_TIMEOUTS
) {
550 pr_debug("Exceeded CRDA call max attempts. Not calling CRDA\n");
554 if (!is_world_regdom((char *) alpha2
))
555 pr_debug("Calling CRDA for country: %c%c\n",
556 alpha2
[0], alpha2
[1]);
558 pr_debug("Calling CRDA to update world regulatory domain\n");
560 ret
= kobject_uevent_env(®_pdev
->dev
.kobj
, KOBJ_CHANGE
, env
);
564 queue_delayed_work(system_power_efficient_wq
,
565 ®_timeout
, msecs_to_jiffies(3142));
569 static bool reg_query_database(struct regulatory_request
*request
)
571 /* query internal regulatory database (if it exists) */
572 if (reg_regdb_query(request
->alpha2
) == 0)
575 if (call_crda(request
->alpha2
) == 0)
581 bool reg_is_valid_request(const char *alpha2
)
583 struct regulatory_request
*lr
= get_last_request();
585 if (!lr
|| lr
->processed
)
588 return alpha2_equal(lr
->alpha2
, alpha2
);
591 static const struct ieee80211_regdomain
*reg_get_regdomain(struct wiphy
*wiphy
)
593 struct regulatory_request
*lr
= get_last_request();
596 * Follow the driver's regulatory domain, if present, unless a country
597 * IE has been processed or a user wants to help complaince further
599 if (lr
->initiator
!= NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
600 lr
->initiator
!= NL80211_REGDOM_SET_BY_USER
&&
602 return get_wiphy_regdom(wiphy
);
604 return get_cfg80211_regdom();
608 reg_get_max_bandwidth_from_range(const struct ieee80211_regdomain
*rd
,
609 const struct ieee80211_reg_rule
*rule
)
611 const struct ieee80211_freq_range
*freq_range
= &rule
->freq_range
;
612 const struct ieee80211_freq_range
*freq_range_tmp
;
613 const struct ieee80211_reg_rule
*tmp
;
614 u32 start_freq
, end_freq
, idx
, no
;
616 for (idx
= 0; idx
< rd
->n_reg_rules
; idx
++)
617 if (rule
== &rd
->reg_rules
[idx
])
620 if (idx
== rd
->n_reg_rules
)
627 tmp
= &rd
->reg_rules
[--no
];
628 freq_range_tmp
= &tmp
->freq_range
;
630 if (freq_range_tmp
->end_freq_khz
< freq_range
->start_freq_khz
)
633 freq_range
= freq_range_tmp
;
636 start_freq
= freq_range
->start_freq_khz
;
639 freq_range
= &rule
->freq_range
;
642 while (no
< rd
->n_reg_rules
- 1) {
643 tmp
= &rd
->reg_rules
[++no
];
644 freq_range_tmp
= &tmp
->freq_range
;
646 if (freq_range_tmp
->start_freq_khz
> freq_range
->end_freq_khz
)
649 freq_range
= freq_range_tmp
;
652 end_freq
= freq_range
->end_freq_khz
;
654 return end_freq
- start_freq
;
657 unsigned int reg_get_max_bandwidth(const struct ieee80211_regdomain
*rd
,
658 const struct ieee80211_reg_rule
*rule
)
660 unsigned int bw
= reg_get_max_bandwidth_from_range(rd
, rule
);
662 if (rule
->flags
& NL80211_RRF_NO_160MHZ
)
663 bw
= min_t(unsigned int, bw
, MHZ_TO_KHZ(80));
664 if (rule
->flags
& NL80211_RRF_NO_80MHZ
)
665 bw
= min_t(unsigned int, bw
, MHZ_TO_KHZ(40));
668 * HT40+/HT40- limits are handled per-channel. Only limit BW if both
671 if (rule
->flags
& NL80211_RRF_NO_HT40MINUS
&&
672 rule
->flags
& NL80211_RRF_NO_HT40PLUS
)
673 bw
= min_t(unsigned int, bw
, MHZ_TO_KHZ(20));
678 /* Sanity check on a regulatory rule */
679 static bool is_valid_reg_rule(const struct ieee80211_reg_rule
*rule
)
681 const struct ieee80211_freq_range
*freq_range
= &rule
->freq_range
;
684 if (freq_range
->start_freq_khz
<= 0 || freq_range
->end_freq_khz
<= 0)
687 if (freq_range
->start_freq_khz
> freq_range
->end_freq_khz
)
690 freq_diff
= freq_range
->end_freq_khz
- freq_range
->start_freq_khz
;
692 if (freq_range
->end_freq_khz
<= freq_range
->start_freq_khz
||
693 freq_range
->max_bandwidth_khz
> freq_diff
)
699 static bool is_valid_rd(const struct ieee80211_regdomain
*rd
)
701 const struct ieee80211_reg_rule
*reg_rule
= NULL
;
704 if (!rd
->n_reg_rules
)
707 if (WARN_ON(rd
->n_reg_rules
> NL80211_MAX_SUPP_REG_RULES
))
710 for (i
= 0; i
< rd
->n_reg_rules
; i
++) {
711 reg_rule
= &rd
->reg_rules
[i
];
712 if (!is_valid_reg_rule(reg_rule
))
719 static bool reg_does_bw_fit(const struct ieee80211_freq_range
*freq_range
,
720 u32 center_freq_khz
, u32 bw_khz
)
722 u32 start_freq_khz
, end_freq_khz
;
724 start_freq_khz
= center_freq_khz
- (bw_khz
/2);
725 end_freq_khz
= center_freq_khz
+ (bw_khz
/2);
727 if (start_freq_khz
>= freq_range
->start_freq_khz
&&
728 end_freq_khz
<= freq_range
->end_freq_khz
)
735 * freq_in_rule_band - tells us if a frequency is in a frequency band
736 * @freq_range: frequency rule we want to query
737 * @freq_khz: frequency we are inquiring about
739 * This lets us know if a specific frequency rule is or is not relevant to
740 * a specific frequency's band. Bands are device specific and artificial
741 * definitions (the "2.4 GHz band", the "5 GHz band" and the "60GHz band"),
742 * however it is safe for now to assume that a frequency rule should not be
743 * part of a frequency's band if the start freq or end freq are off by more
744 * than 2 GHz for the 2.4 and 5 GHz bands, and by more than 10 GHz for the
746 * This resolution can be lowered and should be considered as we add
747 * regulatory rule support for other "bands".
749 static bool freq_in_rule_band(const struct ieee80211_freq_range
*freq_range
,
752 #define ONE_GHZ_IN_KHZ 1000000
754 * From 802.11ad: directional multi-gigabit (DMG):
755 * Pertaining to operation in a frequency band containing a channel
756 * with the Channel starting frequency above 45 GHz.
758 u32 limit
= freq_khz
> 45 * ONE_GHZ_IN_KHZ
?
759 10 * ONE_GHZ_IN_KHZ
: 2 * ONE_GHZ_IN_KHZ
;
760 if (abs(freq_khz
- freq_range
->start_freq_khz
) <= limit
)
762 if (abs(freq_khz
- freq_range
->end_freq_khz
) <= limit
)
765 #undef ONE_GHZ_IN_KHZ
769 * Later on we can perhaps use the more restrictive DFS
770 * region but we don't have information for that yet so
771 * for now simply disallow conflicts.
773 static enum nl80211_dfs_regions
774 reg_intersect_dfs_region(const enum nl80211_dfs_regions dfs_region1
,
775 const enum nl80211_dfs_regions dfs_region2
)
777 if (dfs_region1
!= dfs_region2
)
778 return NL80211_DFS_UNSET
;
783 * Helper for regdom_intersect(), this does the real
784 * mathematical intersection fun
786 static int reg_rules_intersect(const struct ieee80211_regdomain
*rd1
,
787 const struct ieee80211_regdomain
*rd2
,
788 const struct ieee80211_reg_rule
*rule1
,
789 const struct ieee80211_reg_rule
*rule2
,
790 struct ieee80211_reg_rule
*intersected_rule
)
792 const struct ieee80211_freq_range
*freq_range1
, *freq_range2
;
793 struct ieee80211_freq_range
*freq_range
;
794 const struct ieee80211_power_rule
*power_rule1
, *power_rule2
;
795 struct ieee80211_power_rule
*power_rule
;
796 u32 freq_diff
, max_bandwidth1
, max_bandwidth2
;
798 freq_range1
= &rule1
->freq_range
;
799 freq_range2
= &rule2
->freq_range
;
800 freq_range
= &intersected_rule
->freq_range
;
802 power_rule1
= &rule1
->power_rule
;
803 power_rule2
= &rule2
->power_rule
;
804 power_rule
= &intersected_rule
->power_rule
;
806 freq_range
->start_freq_khz
= max(freq_range1
->start_freq_khz
,
807 freq_range2
->start_freq_khz
);
808 freq_range
->end_freq_khz
= min(freq_range1
->end_freq_khz
,
809 freq_range2
->end_freq_khz
);
811 max_bandwidth1
= freq_range1
->max_bandwidth_khz
;
812 max_bandwidth2
= freq_range2
->max_bandwidth_khz
;
814 if (rule1
->flags
& NL80211_RRF_AUTO_BW
)
815 max_bandwidth1
= reg_get_max_bandwidth(rd1
, rule1
);
816 if (rule2
->flags
& NL80211_RRF_AUTO_BW
)
817 max_bandwidth2
= reg_get_max_bandwidth(rd2
, rule2
);
819 freq_range
->max_bandwidth_khz
= min(max_bandwidth1
, max_bandwidth2
);
821 intersected_rule
->flags
= rule1
->flags
| rule2
->flags
;
824 * In case NL80211_RRF_AUTO_BW requested for both rules
825 * set AUTO_BW in intersected rule also. Next we will
826 * calculate BW correctly in handle_channel function.
827 * In other case remove AUTO_BW flag while we calculate
828 * maximum bandwidth correctly and auto calculation is
831 if ((rule1
->flags
& NL80211_RRF_AUTO_BW
) &&
832 (rule2
->flags
& NL80211_RRF_AUTO_BW
))
833 intersected_rule
->flags
|= NL80211_RRF_AUTO_BW
;
835 intersected_rule
->flags
&= ~NL80211_RRF_AUTO_BW
;
837 freq_diff
= freq_range
->end_freq_khz
- freq_range
->start_freq_khz
;
838 if (freq_range
->max_bandwidth_khz
> freq_diff
)
839 freq_range
->max_bandwidth_khz
= freq_diff
;
841 power_rule
->max_eirp
= min(power_rule1
->max_eirp
,
842 power_rule2
->max_eirp
);
843 power_rule
->max_antenna_gain
= min(power_rule1
->max_antenna_gain
,
844 power_rule2
->max_antenna_gain
);
846 intersected_rule
->dfs_cac_ms
= max(rule1
->dfs_cac_ms
,
849 if (!is_valid_reg_rule(intersected_rule
))
855 /* check whether old rule contains new rule */
856 static bool rule_contains(struct ieee80211_reg_rule
*r1
,
857 struct ieee80211_reg_rule
*r2
)
859 /* for simplicity, currently consider only same flags */
860 if (r1
->flags
!= r2
->flags
)
863 /* verify r1 is more restrictive */
864 if ((r1
->power_rule
.max_antenna_gain
>
865 r2
->power_rule
.max_antenna_gain
) ||
866 r1
->power_rule
.max_eirp
> r2
->power_rule
.max_eirp
)
869 /* make sure r2's range is contained within r1 */
870 if (r1
->freq_range
.start_freq_khz
> r2
->freq_range
.start_freq_khz
||
871 r1
->freq_range
.end_freq_khz
< r2
->freq_range
.end_freq_khz
)
874 /* and finally verify that r1.max_bw >= r2.max_bw */
875 if (r1
->freq_range
.max_bandwidth_khz
<
876 r2
->freq_range
.max_bandwidth_khz
)
882 /* add or extend current rules. do nothing if rule is already contained */
883 static void add_rule(struct ieee80211_reg_rule
*rule
,
884 struct ieee80211_reg_rule
*reg_rules
, u32
*n_rules
)
886 struct ieee80211_reg_rule
*tmp_rule
;
889 for (i
= 0; i
< *n_rules
; i
++) {
890 tmp_rule
= ®_rules
[i
];
891 /* rule is already contained - do nothing */
892 if (rule_contains(tmp_rule
, rule
))
895 /* extend rule if possible */
896 if (rule_contains(rule
, tmp_rule
)) {
897 memcpy(tmp_rule
, rule
, sizeof(*rule
));
902 memcpy(®_rules
[*n_rules
], rule
, sizeof(*rule
));
907 * regdom_intersect - do the intersection between two regulatory domains
908 * @rd1: first regulatory domain
909 * @rd2: second regulatory domain
911 * Use this function to get the intersection between two regulatory domains.
912 * Once completed we will mark the alpha2 for the rd as intersected, "98",
913 * as no one single alpha2 can represent this regulatory domain.
915 * Returns a pointer to the regulatory domain structure which will hold the
916 * resulting intersection of rules between rd1 and rd2. We will
917 * kzalloc() this structure for you.
919 static struct ieee80211_regdomain
*
920 regdom_intersect(const struct ieee80211_regdomain
*rd1
,
921 const struct ieee80211_regdomain
*rd2
)
925 unsigned int num_rules
= 0;
926 const struct ieee80211_reg_rule
*rule1
, *rule2
;
927 struct ieee80211_reg_rule intersected_rule
;
928 struct ieee80211_regdomain
*rd
;
934 * First we get a count of the rules we'll need, then we actually
935 * build them. This is to so we can malloc() and free() a
936 * regdomain once. The reason we use reg_rules_intersect() here
937 * is it will return -EINVAL if the rule computed makes no sense.
938 * All rules that do check out OK are valid.
941 for (x
= 0; x
< rd1
->n_reg_rules
; x
++) {
942 rule1
= &rd1
->reg_rules
[x
];
943 for (y
= 0; y
< rd2
->n_reg_rules
; y
++) {
944 rule2
= &rd2
->reg_rules
[y
];
945 if (!reg_rules_intersect(rd1
, rd2
, rule1
, rule2
,
954 size_of_regd
= sizeof(struct ieee80211_regdomain
) +
955 num_rules
* sizeof(struct ieee80211_reg_rule
);
957 rd
= kzalloc(size_of_regd
, GFP_KERNEL
);
961 for (x
= 0; x
< rd1
->n_reg_rules
; x
++) {
962 rule1
= &rd1
->reg_rules
[x
];
963 for (y
= 0; y
< rd2
->n_reg_rules
; y
++) {
964 rule2
= &rd2
->reg_rules
[y
];
965 r
= reg_rules_intersect(rd1
, rd2
, rule1
, rule2
,
968 * No need to memset here the intersected rule here as
969 * we're not using the stack anymore
974 add_rule(&intersected_rule
, rd
->reg_rules
,
981 rd
->dfs_region
= reg_intersect_dfs_region(rd1
->dfs_region
,
988 * XXX: add support for the rest of enum nl80211_reg_rule_flags, we may
989 * want to just have the channel structure use these
991 static u32
map_regdom_flags(u32 rd_flags
)
993 u32 channel_flags
= 0;
994 if (rd_flags
& NL80211_RRF_NO_IR_ALL
)
995 channel_flags
|= IEEE80211_CHAN_NO_IR
;
996 if (rd_flags
& NL80211_RRF_DFS
)
997 channel_flags
|= IEEE80211_CHAN_RADAR
;
998 if (rd_flags
& NL80211_RRF_NO_OFDM
)
999 channel_flags
|= IEEE80211_CHAN_NO_OFDM
;
1000 if (rd_flags
& NL80211_RRF_NO_OUTDOOR
)
1001 channel_flags
|= IEEE80211_CHAN_INDOOR_ONLY
;
1002 if (rd_flags
& NL80211_RRF_IR_CONCURRENT
)
1003 channel_flags
|= IEEE80211_CHAN_IR_CONCURRENT
;
1004 if (rd_flags
& NL80211_RRF_NO_HT40MINUS
)
1005 channel_flags
|= IEEE80211_CHAN_NO_HT40MINUS
;
1006 if (rd_flags
& NL80211_RRF_NO_HT40PLUS
)
1007 channel_flags
|= IEEE80211_CHAN_NO_HT40PLUS
;
1008 if (rd_flags
& NL80211_RRF_NO_80MHZ
)
1009 channel_flags
|= IEEE80211_CHAN_NO_80MHZ
;
1010 if (rd_flags
& NL80211_RRF_NO_160MHZ
)
1011 channel_flags
|= IEEE80211_CHAN_NO_160MHZ
;
1012 return channel_flags
;
1015 static const struct ieee80211_reg_rule
*
1016 freq_reg_info_regd(struct wiphy
*wiphy
, u32 center_freq
,
1017 const struct ieee80211_regdomain
*regd
, u32 bw
)
1020 bool band_rule_found
= false;
1021 bool bw_fits
= false;
1024 return ERR_PTR(-EINVAL
);
1026 for (i
= 0; i
< regd
->n_reg_rules
; i
++) {
1027 const struct ieee80211_reg_rule
*rr
;
1028 const struct ieee80211_freq_range
*fr
= NULL
;
1030 rr
= ®d
->reg_rules
[i
];
1031 fr
= &rr
->freq_range
;
1034 * We only need to know if one frequency rule was
1035 * was in center_freq's band, that's enough, so lets
1036 * not overwrite it once found
1038 if (!band_rule_found
)
1039 band_rule_found
= freq_in_rule_band(fr
, center_freq
);
1041 bw_fits
= reg_does_bw_fit(fr
, center_freq
, bw
);
1043 if (band_rule_found
&& bw_fits
)
1047 if (!band_rule_found
)
1048 return ERR_PTR(-ERANGE
);
1050 return ERR_PTR(-EINVAL
);
1053 static const struct ieee80211_reg_rule
*
1054 __freq_reg_info(struct wiphy
*wiphy
, u32 center_freq
, u32 min_bw
)
1056 const struct ieee80211_regdomain
*regd
= reg_get_regdomain(wiphy
);
1057 const struct ieee80211_reg_rule
*reg_rule
= NULL
;
1060 for (bw
= MHZ_TO_KHZ(20); bw
>= min_bw
; bw
= bw
/ 2) {
1061 reg_rule
= freq_reg_info_regd(wiphy
, center_freq
, regd
, bw
);
1062 if (!IS_ERR(reg_rule
))
1069 const struct ieee80211_reg_rule
*freq_reg_info(struct wiphy
*wiphy
,
1072 return __freq_reg_info(wiphy
, center_freq
, MHZ_TO_KHZ(20));
1074 EXPORT_SYMBOL(freq_reg_info
);
1076 const char *reg_initiator_name(enum nl80211_reg_initiator initiator
)
1078 switch (initiator
) {
1079 case NL80211_REGDOM_SET_BY_CORE
:
1081 case NL80211_REGDOM_SET_BY_USER
:
1083 case NL80211_REGDOM_SET_BY_DRIVER
:
1085 case NL80211_REGDOM_SET_BY_COUNTRY_IE
:
1086 return "country IE";
1092 EXPORT_SYMBOL(reg_initiator_name
);
1094 #ifdef CONFIG_CFG80211_REG_DEBUG
1095 static void chan_reg_rule_print_dbg(const struct ieee80211_regdomain
*regd
,
1096 struct ieee80211_channel
*chan
,
1097 const struct ieee80211_reg_rule
*reg_rule
)
1099 const struct ieee80211_power_rule
*power_rule
;
1100 const struct ieee80211_freq_range
*freq_range
;
1101 char max_antenna_gain
[32], bw
[32];
1103 power_rule
= ®_rule
->power_rule
;
1104 freq_range
= ®_rule
->freq_range
;
1106 if (!power_rule
->max_antenna_gain
)
1107 snprintf(max_antenna_gain
, sizeof(max_antenna_gain
), "N/A");
1109 snprintf(max_antenna_gain
, sizeof(max_antenna_gain
), "%d",
1110 power_rule
->max_antenna_gain
);
1112 if (reg_rule
->flags
& NL80211_RRF_AUTO_BW
)
1113 snprintf(bw
, sizeof(bw
), "%d KHz, %d KHz AUTO",
1114 freq_range
->max_bandwidth_khz
,
1115 reg_get_max_bandwidth(regd
, reg_rule
));
1117 snprintf(bw
, sizeof(bw
), "%d KHz",
1118 freq_range
->max_bandwidth_khz
);
1120 REG_DBG_PRINT("Updating information on frequency %d MHz with regulatory rule:\n",
1123 REG_DBG_PRINT("%d KHz - %d KHz @ %s), (%s mBi, %d mBm)\n",
1124 freq_range
->start_freq_khz
, freq_range
->end_freq_khz
,
1125 bw
, max_antenna_gain
,
1126 power_rule
->max_eirp
);
1129 static void chan_reg_rule_print_dbg(const struct ieee80211_regdomain
*regd
,
1130 struct ieee80211_channel
*chan
,
1131 const struct ieee80211_reg_rule
*reg_rule
)
1138 * Note that right now we assume the desired channel bandwidth
1139 * is always 20 MHz for each individual channel (HT40 uses 20 MHz
1140 * per channel, the primary and the extension channel).
1142 static void handle_channel(struct wiphy
*wiphy
,
1143 enum nl80211_reg_initiator initiator
,
1144 struct ieee80211_channel
*chan
)
1146 u32 flags
, bw_flags
= 0;
1147 const struct ieee80211_reg_rule
*reg_rule
= NULL
;
1148 const struct ieee80211_power_rule
*power_rule
= NULL
;
1149 const struct ieee80211_freq_range
*freq_range
= NULL
;
1150 struct wiphy
*request_wiphy
= NULL
;
1151 struct regulatory_request
*lr
= get_last_request();
1152 const struct ieee80211_regdomain
*regd
;
1153 u32 max_bandwidth_khz
;
1155 request_wiphy
= wiphy_idx_to_wiphy(lr
->wiphy_idx
);
1157 flags
= chan
->orig_flags
;
1159 reg_rule
= freq_reg_info(wiphy
, MHZ_TO_KHZ(chan
->center_freq
));
1160 if (IS_ERR(reg_rule
)) {
1162 * We will disable all channels that do not match our
1163 * received regulatory rule unless the hint is coming
1164 * from a Country IE and the Country IE had no information
1165 * about a band. The IEEE 802.11 spec allows for an AP
1166 * to send only a subset of the regulatory rules allowed,
1167 * so an AP in the US that only supports 2.4 GHz may only send
1168 * a country IE with information for the 2.4 GHz band
1169 * while 5 GHz is still supported.
1171 if (initiator
== NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
1172 PTR_ERR(reg_rule
) == -ERANGE
)
1175 if (lr
->initiator
== NL80211_REGDOM_SET_BY_DRIVER
&&
1176 request_wiphy
&& request_wiphy
== wiphy
&&
1177 request_wiphy
->regulatory_flags
& REGULATORY_STRICT_REG
) {
1178 REG_DBG_PRINT("Disabling freq %d MHz for good\n",
1180 chan
->orig_flags
|= IEEE80211_CHAN_DISABLED
;
1181 chan
->flags
= chan
->orig_flags
;
1183 REG_DBG_PRINT("Disabling freq %d MHz\n",
1185 chan
->flags
|= IEEE80211_CHAN_DISABLED
;
1190 regd
= reg_get_regdomain(wiphy
);
1191 chan_reg_rule_print_dbg(regd
, chan
, reg_rule
);
1193 power_rule
= ®_rule
->power_rule
;
1194 freq_range
= ®_rule
->freq_range
;
1196 max_bandwidth_khz
= freq_range
->max_bandwidth_khz
;
1197 /* Check if auto calculation requested */
1198 if (reg_rule
->flags
& NL80211_RRF_AUTO_BW
)
1199 max_bandwidth_khz
= reg_get_max_bandwidth(regd
, reg_rule
);
1201 /* If we get a reg_rule we can assume that at least 5Mhz fit */
1202 if (!reg_does_bw_fit(freq_range
, MHZ_TO_KHZ(chan
->center_freq
),
1204 bw_flags
|= IEEE80211_CHAN_NO_10MHZ
;
1205 if (!reg_does_bw_fit(freq_range
, MHZ_TO_KHZ(chan
->center_freq
),
1207 bw_flags
|= IEEE80211_CHAN_NO_20MHZ
;
1209 if (max_bandwidth_khz
< MHZ_TO_KHZ(10))
1210 bw_flags
|= IEEE80211_CHAN_NO_10MHZ
;
1211 if (max_bandwidth_khz
< MHZ_TO_KHZ(20))
1212 bw_flags
|= IEEE80211_CHAN_NO_20MHZ
;
1213 if (max_bandwidth_khz
< MHZ_TO_KHZ(40))
1214 bw_flags
|= IEEE80211_CHAN_NO_HT40
;
1215 if (max_bandwidth_khz
< MHZ_TO_KHZ(80))
1216 bw_flags
|= IEEE80211_CHAN_NO_80MHZ
;
1217 if (max_bandwidth_khz
< MHZ_TO_KHZ(160))
1218 bw_flags
|= IEEE80211_CHAN_NO_160MHZ
;
1220 if (lr
->initiator
== NL80211_REGDOM_SET_BY_DRIVER
&&
1221 request_wiphy
&& request_wiphy
== wiphy
&&
1222 request_wiphy
->regulatory_flags
& REGULATORY_STRICT_REG
) {
1224 * This guarantees the driver's requested regulatory domain
1225 * will always be used as a base for further regulatory
1228 chan
->flags
= chan
->orig_flags
=
1229 map_regdom_flags(reg_rule
->flags
) | bw_flags
;
1230 chan
->max_antenna_gain
= chan
->orig_mag
=
1231 (int) MBI_TO_DBI(power_rule
->max_antenna_gain
);
1232 chan
->max_reg_power
= chan
->max_power
= chan
->orig_mpwr
=
1233 (int) MBM_TO_DBM(power_rule
->max_eirp
);
1235 if (chan
->flags
& IEEE80211_CHAN_RADAR
) {
1236 chan
->dfs_cac_ms
= IEEE80211_DFS_MIN_CAC_TIME_MS
;
1237 if (reg_rule
->dfs_cac_ms
)
1238 chan
->dfs_cac_ms
= reg_rule
->dfs_cac_ms
;
1244 chan
->dfs_state
= NL80211_DFS_USABLE
;
1245 chan
->dfs_state_entered
= jiffies
;
1247 chan
->beacon_found
= false;
1248 chan
->flags
= flags
| bw_flags
| map_regdom_flags(reg_rule
->flags
);
1249 chan
->max_antenna_gain
=
1250 min_t(int, chan
->orig_mag
,
1251 MBI_TO_DBI(power_rule
->max_antenna_gain
));
1252 chan
->max_reg_power
= (int) MBM_TO_DBM(power_rule
->max_eirp
);
1254 if (chan
->flags
& IEEE80211_CHAN_RADAR
) {
1255 if (reg_rule
->dfs_cac_ms
)
1256 chan
->dfs_cac_ms
= reg_rule
->dfs_cac_ms
;
1258 chan
->dfs_cac_ms
= IEEE80211_DFS_MIN_CAC_TIME_MS
;
1261 if (chan
->orig_mpwr
) {
1263 * Devices that use REGULATORY_COUNTRY_IE_FOLLOW_POWER
1264 * will always follow the passed country IE power settings.
1266 if (initiator
== NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
1267 wiphy
->regulatory_flags
& REGULATORY_COUNTRY_IE_FOLLOW_POWER
)
1268 chan
->max_power
= chan
->max_reg_power
;
1270 chan
->max_power
= min(chan
->orig_mpwr
,
1271 chan
->max_reg_power
);
1273 chan
->max_power
= chan
->max_reg_power
;
1276 static void handle_band(struct wiphy
*wiphy
,
1277 enum nl80211_reg_initiator initiator
,
1278 struct ieee80211_supported_band
*sband
)
1285 for (i
= 0; i
< sband
->n_channels
; i
++)
1286 handle_channel(wiphy
, initiator
, &sband
->channels
[i
]);
1289 static bool reg_request_cell_base(struct regulatory_request
*request
)
1291 if (request
->initiator
!= NL80211_REGDOM_SET_BY_USER
)
1293 return request
->user_reg_hint_type
== NL80211_USER_REG_HINT_CELL_BASE
;
1296 bool reg_last_request_cell_base(void)
1298 return reg_request_cell_base(get_last_request());
1301 #ifdef CONFIG_CFG80211_REG_CELLULAR_HINTS
1302 /* Core specific check */
1303 static enum reg_request_treatment
1304 reg_ignore_cell_hint(struct regulatory_request
*pending_request
)
1306 struct regulatory_request
*lr
= get_last_request();
1308 if (!reg_num_devs_support_basehint
)
1309 return REG_REQ_IGNORE
;
1311 if (reg_request_cell_base(lr
) &&
1312 !regdom_changes(pending_request
->alpha2
))
1313 return REG_REQ_ALREADY_SET
;
1318 /* Device specific check */
1319 static bool reg_dev_ignore_cell_hint(struct wiphy
*wiphy
)
1321 return !(wiphy
->features
& NL80211_FEATURE_CELL_BASE_REG_HINTS
);
1324 static int reg_ignore_cell_hint(struct regulatory_request
*pending_request
)
1326 return REG_REQ_IGNORE
;
1329 static bool reg_dev_ignore_cell_hint(struct wiphy
*wiphy
)
1335 static bool wiphy_strict_alpha2_regd(struct wiphy
*wiphy
)
1337 if (wiphy
->regulatory_flags
& REGULATORY_STRICT_REG
&&
1338 !(wiphy
->regulatory_flags
& REGULATORY_CUSTOM_REG
))
1343 static bool ignore_reg_update(struct wiphy
*wiphy
,
1344 enum nl80211_reg_initiator initiator
)
1346 struct regulatory_request
*lr
= get_last_request();
1348 if (wiphy
->regulatory_flags
& REGULATORY_WIPHY_SELF_MANAGED
)
1352 REG_DBG_PRINT("Ignoring regulatory request set by %s "
1353 "since last_request is not set\n",
1354 reg_initiator_name(initiator
));
1358 if (initiator
== NL80211_REGDOM_SET_BY_CORE
&&
1359 wiphy
->regulatory_flags
& REGULATORY_CUSTOM_REG
) {
1360 REG_DBG_PRINT("Ignoring regulatory request set by %s "
1361 "since the driver uses its own custom "
1362 "regulatory domain\n",
1363 reg_initiator_name(initiator
));
1368 * wiphy->regd will be set once the device has its own
1369 * desired regulatory domain set
1371 if (wiphy_strict_alpha2_regd(wiphy
) && !wiphy
->regd
&&
1372 initiator
!= NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
1373 !is_world_regdom(lr
->alpha2
)) {
1374 REG_DBG_PRINT("Ignoring regulatory request set by %s "
1375 "since the driver requires its own regulatory "
1376 "domain to be set first\n",
1377 reg_initiator_name(initiator
));
1381 if (reg_request_cell_base(lr
))
1382 return reg_dev_ignore_cell_hint(wiphy
);
1387 static bool reg_is_world_roaming(struct wiphy
*wiphy
)
1389 const struct ieee80211_regdomain
*cr
= get_cfg80211_regdom();
1390 const struct ieee80211_regdomain
*wr
= get_wiphy_regdom(wiphy
);
1391 struct regulatory_request
*lr
= get_last_request();
1393 if (is_world_regdom(cr
->alpha2
) || (wr
&& is_world_regdom(wr
->alpha2
)))
1396 if (lr
&& lr
->initiator
!= NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
1397 wiphy
->regulatory_flags
& REGULATORY_CUSTOM_REG
)
1403 static void handle_reg_beacon(struct wiphy
*wiphy
, unsigned int chan_idx
,
1404 struct reg_beacon
*reg_beacon
)
1406 struct ieee80211_supported_band
*sband
;
1407 struct ieee80211_channel
*chan
;
1408 bool channel_changed
= false;
1409 struct ieee80211_channel chan_before
;
1411 sband
= wiphy
->bands
[reg_beacon
->chan
.band
];
1412 chan
= &sband
->channels
[chan_idx
];
1414 if (likely(chan
->center_freq
!= reg_beacon
->chan
.center_freq
))
1417 if (chan
->beacon_found
)
1420 chan
->beacon_found
= true;
1422 if (!reg_is_world_roaming(wiphy
))
1425 if (wiphy
->regulatory_flags
& REGULATORY_DISABLE_BEACON_HINTS
)
1428 chan_before
.center_freq
= chan
->center_freq
;
1429 chan_before
.flags
= chan
->flags
;
1431 if (chan
->flags
& IEEE80211_CHAN_NO_IR
) {
1432 chan
->flags
&= ~IEEE80211_CHAN_NO_IR
;
1433 channel_changed
= true;
1436 if (channel_changed
)
1437 nl80211_send_beacon_hint_event(wiphy
, &chan_before
, chan
);
1441 * Called when a scan on a wiphy finds a beacon on
1444 static void wiphy_update_new_beacon(struct wiphy
*wiphy
,
1445 struct reg_beacon
*reg_beacon
)
1448 struct ieee80211_supported_band
*sband
;
1450 if (!wiphy
->bands
[reg_beacon
->chan
.band
])
1453 sband
= wiphy
->bands
[reg_beacon
->chan
.band
];
1455 for (i
= 0; i
< sband
->n_channels
; i
++)
1456 handle_reg_beacon(wiphy
, i
, reg_beacon
);
1460 * Called upon reg changes or a new wiphy is added
1462 static void wiphy_update_beacon_reg(struct wiphy
*wiphy
)
1465 struct ieee80211_supported_band
*sband
;
1466 struct reg_beacon
*reg_beacon
;
1468 list_for_each_entry(reg_beacon
, ®_beacon_list
, list
) {
1469 if (!wiphy
->bands
[reg_beacon
->chan
.band
])
1471 sband
= wiphy
->bands
[reg_beacon
->chan
.band
];
1472 for (i
= 0; i
< sband
->n_channels
; i
++)
1473 handle_reg_beacon(wiphy
, i
, reg_beacon
);
1477 /* Reap the advantages of previously found beacons */
1478 static void reg_process_beacons(struct wiphy
*wiphy
)
1481 * Means we are just firing up cfg80211, so no beacons would
1482 * have been processed yet.
1486 wiphy_update_beacon_reg(wiphy
);
1489 static bool is_ht40_allowed(struct ieee80211_channel
*chan
)
1493 if (chan
->flags
& IEEE80211_CHAN_DISABLED
)
1495 /* This would happen when regulatory rules disallow HT40 completely */
1496 if ((chan
->flags
& IEEE80211_CHAN_NO_HT40
) == IEEE80211_CHAN_NO_HT40
)
1501 static void reg_process_ht_flags_channel(struct wiphy
*wiphy
,
1502 struct ieee80211_channel
*channel
)
1504 struct ieee80211_supported_band
*sband
= wiphy
->bands
[channel
->band
];
1505 struct ieee80211_channel
*channel_before
= NULL
, *channel_after
= NULL
;
1508 if (!is_ht40_allowed(channel
)) {
1509 channel
->flags
|= IEEE80211_CHAN_NO_HT40
;
1514 * We need to ensure the extension channels exist to
1515 * be able to use HT40- or HT40+, this finds them (or not)
1517 for (i
= 0; i
< sband
->n_channels
; i
++) {
1518 struct ieee80211_channel
*c
= &sband
->channels
[i
];
1520 if (c
->center_freq
== (channel
->center_freq
- 20))
1522 if (c
->center_freq
== (channel
->center_freq
+ 20))
1527 * Please note that this assumes target bandwidth is 20 MHz,
1528 * if that ever changes we also need to change the below logic
1529 * to include that as well.
1531 if (!is_ht40_allowed(channel_before
))
1532 channel
->flags
|= IEEE80211_CHAN_NO_HT40MINUS
;
1534 channel
->flags
&= ~IEEE80211_CHAN_NO_HT40MINUS
;
1536 if (!is_ht40_allowed(channel_after
))
1537 channel
->flags
|= IEEE80211_CHAN_NO_HT40PLUS
;
1539 channel
->flags
&= ~IEEE80211_CHAN_NO_HT40PLUS
;
1542 static void reg_process_ht_flags_band(struct wiphy
*wiphy
,
1543 struct ieee80211_supported_band
*sband
)
1550 for (i
= 0; i
< sband
->n_channels
; i
++)
1551 reg_process_ht_flags_channel(wiphy
, &sband
->channels
[i
]);
1554 static void reg_process_ht_flags(struct wiphy
*wiphy
)
1556 enum ieee80211_band band
;
1561 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++)
1562 reg_process_ht_flags_band(wiphy
, wiphy
->bands
[band
]);
1565 static void reg_call_notifier(struct wiphy
*wiphy
,
1566 struct regulatory_request
*request
)
1568 if (wiphy
->reg_notifier
)
1569 wiphy
->reg_notifier(wiphy
, request
);
1572 static bool reg_wdev_chan_valid(struct wiphy
*wiphy
, struct wireless_dev
*wdev
)
1574 struct cfg80211_chan_def chandef
;
1575 struct cfg80211_registered_device
*rdev
= wiphy_to_rdev(wiphy
);
1576 enum nl80211_iftype iftype
;
1579 iftype
= wdev
->iftype
;
1581 /* make sure the interface is active */
1582 if (!wdev
->netdev
|| !netif_running(wdev
->netdev
))
1583 goto wdev_inactive_unlock
;
1586 case NL80211_IFTYPE_AP
:
1587 case NL80211_IFTYPE_P2P_GO
:
1588 if (!wdev
->beacon_interval
)
1589 goto wdev_inactive_unlock
;
1590 chandef
= wdev
->chandef
;
1592 case NL80211_IFTYPE_ADHOC
:
1593 if (!wdev
->ssid_len
)
1594 goto wdev_inactive_unlock
;
1595 chandef
= wdev
->chandef
;
1597 case NL80211_IFTYPE_STATION
:
1598 case NL80211_IFTYPE_P2P_CLIENT
:
1599 if (!wdev
->current_bss
||
1600 !wdev
->current_bss
->pub
.channel
)
1601 goto wdev_inactive_unlock
;
1603 if (!rdev
->ops
->get_channel
||
1604 rdev_get_channel(rdev
, wdev
, &chandef
))
1605 cfg80211_chandef_create(&chandef
,
1606 wdev
->current_bss
->pub
.channel
,
1607 NL80211_CHAN_NO_HT
);
1609 case NL80211_IFTYPE_MONITOR
:
1610 case NL80211_IFTYPE_AP_VLAN
:
1611 case NL80211_IFTYPE_P2P_DEVICE
:
1612 /* no enforcement required */
1615 /* others not implemented for now */
1623 case NL80211_IFTYPE_AP
:
1624 case NL80211_IFTYPE_P2P_GO
:
1625 case NL80211_IFTYPE_ADHOC
:
1626 return cfg80211_reg_can_beacon_relax(wiphy
, &chandef
, iftype
);
1627 case NL80211_IFTYPE_STATION
:
1628 case NL80211_IFTYPE_P2P_CLIENT
:
1629 return cfg80211_chandef_usable(wiphy
, &chandef
,
1630 IEEE80211_CHAN_DISABLED
);
1637 wdev_inactive_unlock
:
1642 static void reg_leave_invalid_chans(struct wiphy
*wiphy
)
1644 struct wireless_dev
*wdev
;
1645 struct cfg80211_registered_device
*rdev
= wiphy_to_rdev(wiphy
);
1649 list_for_each_entry(wdev
, &rdev
->wdev_list
, list
)
1650 if (!reg_wdev_chan_valid(wiphy
, wdev
))
1651 cfg80211_leave(rdev
, wdev
);
1654 static void reg_check_chans_work(struct work_struct
*work
)
1656 struct cfg80211_registered_device
*rdev
;
1658 REG_DBG_PRINT("Verifying active interfaces after reg change\n");
1661 list_for_each_entry(rdev
, &cfg80211_rdev_list
, list
)
1662 if (!(rdev
->wiphy
.regulatory_flags
&
1663 REGULATORY_IGNORE_STALE_KICKOFF
))
1664 reg_leave_invalid_chans(&rdev
->wiphy
);
1669 static void reg_check_channels(void)
1672 * Give usermode a chance to do something nicer (move to another
1673 * channel, orderly disconnection), before forcing a disconnection.
1675 mod_delayed_work(system_power_efficient_wq
,
1677 msecs_to_jiffies(REG_ENFORCE_GRACE_MS
));
1680 static void wiphy_update_regulatory(struct wiphy
*wiphy
,
1681 enum nl80211_reg_initiator initiator
)
1683 enum ieee80211_band band
;
1684 struct regulatory_request
*lr
= get_last_request();
1686 if (ignore_reg_update(wiphy
, initiator
)) {
1688 * Regulatory updates set by CORE are ignored for custom
1689 * regulatory cards. Let us notify the changes to the driver,
1690 * as some drivers used this to restore its orig_* reg domain.
1692 if (initiator
== NL80211_REGDOM_SET_BY_CORE
&&
1693 wiphy
->regulatory_flags
& REGULATORY_CUSTOM_REG
)
1694 reg_call_notifier(wiphy
, lr
);
1698 lr
->dfs_region
= get_cfg80211_regdom()->dfs_region
;
1700 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++)
1701 handle_band(wiphy
, initiator
, wiphy
->bands
[band
]);
1703 reg_process_beacons(wiphy
);
1704 reg_process_ht_flags(wiphy
);
1705 reg_call_notifier(wiphy
, lr
);
1708 static void update_all_wiphy_regulatory(enum nl80211_reg_initiator initiator
)
1710 struct cfg80211_registered_device
*rdev
;
1711 struct wiphy
*wiphy
;
1715 list_for_each_entry(rdev
, &cfg80211_rdev_list
, list
) {
1716 wiphy
= &rdev
->wiphy
;
1717 wiphy_update_regulatory(wiphy
, initiator
);
1720 reg_check_channels();
1723 static void handle_channel_custom(struct wiphy
*wiphy
,
1724 struct ieee80211_channel
*chan
,
1725 const struct ieee80211_regdomain
*regd
)
1728 const struct ieee80211_reg_rule
*reg_rule
= NULL
;
1729 const struct ieee80211_power_rule
*power_rule
= NULL
;
1730 const struct ieee80211_freq_range
*freq_range
= NULL
;
1731 u32 max_bandwidth_khz
;
1734 for (bw
= MHZ_TO_KHZ(20); bw
>= MHZ_TO_KHZ(5); bw
= bw
/ 2) {
1735 reg_rule
= freq_reg_info_regd(wiphy
,
1736 MHZ_TO_KHZ(chan
->center_freq
),
1738 if (!IS_ERR(reg_rule
))
1742 if (IS_ERR(reg_rule
)) {
1743 REG_DBG_PRINT("Disabling freq %d MHz as custom regd has no rule that fits it\n",
1745 if (wiphy
->regulatory_flags
& REGULATORY_WIPHY_SELF_MANAGED
) {
1746 chan
->flags
|= IEEE80211_CHAN_DISABLED
;
1748 chan
->orig_flags
|= IEEE80211_CHAN_DISABLED
;
1749 chan
->flags
= chan
->orig_flags
;
1754 chan_reg_rule_print_dbg(regd
, chan
, reg_rule
);
1756 power_rule
= ®_rule
->power_rule
;
1757 freq_range
= ®_rule
->freq_range
;
1759 max_bandwidth_khz
= freq_range
->max_bandwidth_khz
;
1760 /* Check if auto calculation requested */
1761 if (reg_rule
->flags
& NL80211_RRF_AUTO_BW
)
1762 max_bandwidth_khz
= reg_get_max_bandwidth(regd
, reg_rule
);
1764 /* If we get a reg_rule we can assume that at least 5Mhz fit */
1765 if (!reg_does_bw_fit(freq_range
, MHZ_TO_KHZ(chan
->center_freq
),
1767 bw_flags
|= IEEE80211_CHAN_NO_10MHZ
;
1768 if (!reg_does_bw_fit(freq_range
, MHZ_TO_KHZ(chan
->center_freq
),
1770 bw_flags
|= IEEE80211_CHAN_NO_20MHZ
;
1772 if (max_bandwidth_khz
< MHZ_TO_KHZ(10))
1773 bw_flags
|= IEEE80211_CHAN_NO_10MHZ
;
1774 if (max_bandwidth_khz
< MHZ_TO_KHZ(20))
1775 bw_flags
|= IEEE80211_CHAN_NO_20MHZ
;
1776 if (max_bandwidth_khz
< MHZ_TO_KHZ(40))
1777 bw_flags
|= IEEE80211_CHAN_NO_HT40
;
1778 if (max_bandwidth_khz
< MHZ_TO_KHZ(80))
1779 bw_flags
|= IEEE80211_CHAN_NO_80MHZ
;
1780 if (max_bandwidth_khz
< MHZ_TO_KHZ(160))
1781 bw_flags
|= IEEE80211_CHAN_NO_160MHZ
;
1783 chan
->dfs_state_entered
= jiffies
;
1784 chan
->dfs_state
= NL80211_DFS_USABLE
;
1786 chan
->beacon_found
= false;
1788 if (wiphy
->regulatory_flags
& REGULATORY_WIPHY_SELF_MANAGED
)
1789 chan
->flags
= chan
->orig_flags
| bw_flags
|
1790 map_regdom_flags(reg_rule
->flags
);
1792 chan
->flags
|= map_regdom_flags(reg_rule
->flags
) | bw_flags
;
1794 chan
->max_antenna_gain
= (int) MBI_TO_DBI(power_rule
->max_antenna_gain
);
1795 chan
->max_reg_power
= chan
->max_power
=
1796 (int) MBM_TO_DBM(power_rule
->max_eirp
);
1798 if (chan
->flags
& IEEE80211_CHAN_RADAR
) {
1799 if (reg_rule
->dfs_cac_ms
)
1800 chan
->dfs_cac_ms
= reg_rule
->dfs_cac_ms
;
1802 chan
->dfs_cac_ms
= IEEE80211_DFS_MIN_CAC_TIME_MS
;
1805 chan
->max_power
= chan
->max_reg_power
;
1808 static void handle_band_custom(struct wiphy
*wiphy
,
1809 struct ieee80211_supported_band
*sband
,
1810 const struct ieee80211_regdomain
*regd
)
1817 for (i
= 0; i
< sband
->n_channels
; i
++)
1818 handle_channel_custom(wiphy
, &sband
->channels
[i
], regd
);
1821 /* Used by drivers prior to wiphy registration */
1822 void wiphy_apply_custom_regulatory(struct wiphy
*wiphy
,
1823 const struct ieee80211_regdomain
*regd
)
1825 enum ieee80211_band band
;
1826 unsigned int bands_set
= 0;
1828 WARN(!(wiphy
->regulatory_flags
& REGULATORY_CUSTOM_REG
),
1829 "wiphy should have REGULATORY_CUSTOM_REG\n");
1830 wiphy
->regulatory_flags
|= REGULATORY_CUSTOM_REG
;
1832 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++) {
1833 if (!wiphy
->bands
[band
])
1835 handle_band_custom(wiphy
, wiphy
->bands
[band
], regd
);
1840 * no point in calling this if it won't have any effect
1841 * on your device's supported bands.
1843 WARN_ON(!bands_set
);
1845 EXPORT_SYMBOL(wiphy_apply_custom_regulatory
);
1847 static void reg_set_request_processed(void)
1849 bool need_more_processing
= false;
1850 struct regulatory_request
*lr
= get_last_request();
1852 lr
->processed
= true;
1854 spin_lock(®_requests_lock
);
1855 if (!list_empty(®_requests_list
))
1856 need_more_processing
= true;
1857 spin_unlock(®_requests_lock
);
1859 cancel_delayed_work(®_timeout
);
1861 if (need_more_processing
)
1862 schedule_work(®_work
);
1866 * reg_process_hint_core - process core regulatory requests
1867 * @pending_request: a pending core regulatory request
1869 * The wireless subsystem can use this function to process
1870 * a regulatory request issued by the regulatory core.
1872 static void reg_process_hint_core(struct regulatory_request
*core_request
)
1874 if (reg_query_database(core_request
)) {
1875 core_request
->intersect
= false;
1876 core_request
->processed
= false;
1877 reg_update_last_request(core_request
);
1881 static enum reg_request_treatment
1882 __reg_process_hint_user(struct regulatory_request
*user_request
)
1884 struct regulatory_request
*lr
= get_last_request();
1886 if (reg_request_cell_base(user_request
))
1887 return reg_ignore_cell_hint(user_request
);
1889 if (reg_request_cell_base(lr
))
1890 return REG_REQ_IGNORE
;
1892 if (lr
->initiator
== NL80211_REGDOM_SET_BY_COUNTRY_IE
)
1893 return REG_REQ_INTERSECT
;
1895 * If the user knows better the user should set the regdom
1896 * to their country before the IE is picked up
1898 if (lr
->initiator
== NL80211_REGDOM_SET_BY_USER
&&
1900 return REG_REQ_IGNORE
;
1902 * Process user requests only after previous user/driver/core
1903 * requests have been processed
1905 if ((lr
->initiator
== NL80211_REGDOM_SET_BY_CORE
||
1906 lr
->initiator
== NL80211_REGDOM_SET_BY_DRIVER
||
1907 lr
->initiator
== NL80211_REGDOM_SET_BY_USER
) &&
1908 regdom_changes(lr
->alpha2
))
1909 return REG_REQ_IGNORE
;
1911 if (!regdom_changes(user_request
->alpha2
))
1912 return REG_REQ_ALREADY_SET
;
1918 * reg_process_hint_user - process user regulatory requests
1919 * @user_request: a pending user regulatory request
1921 * The wireless subsystem can use this function to process
1922 * a regulatory request initiated by userspace.
1924 static void reg_process_hint_user(struct regulatory_request
*user_request
)
1926 enum reg_request_treatment treatment
;
1928 treatment
= __reg_process_hint_user(user_request
);
1929 if (treatment
== REG_REQ_IGNORE
||
1930 treatment
== REG_REQ_ALREADY_SET
) {
1931 reg_free_request(user_request
);
1935 user_request
->intersect
= treatment
== REG_REQ_INTERSECT
;
1936 user_request
->processed
= false;
1938 if (reg_query_database(user_request
)) {
1939 reg_update_last_request(user_request
);
1940 user_alpha2
[0] = user_request
->alpha2
[0];
1941 user_alpha2
[1] = user_request
->alpha2
[1];
1943 reg_free_request(user_request
);
1947 static enum reg_request_treatment
1948 __reg_process_hint_driver(struct regulatory_request
*driver_request
)
1950 struct regulatory_request
*lr
= get_last_request();
1952 if (lr
->initiator
== NL80211_REGDOM_SET_BY_CORE
) {
1953 if (regdom_changes(driver_request
->alpha2
))
1955 return REG_REQ_ALREADY_SET
;
1959 * This would happen if you unplug and plug your card
1960 * back in or if you add a new device for which the previously
1961 * loaded card also agrees on the regulatory domain.
1963 if (lr
->initiator
== NL80211_REGDOM_SET_BY_DRIVER
&&
1964 !regdom_changes(driver_request
->alpha2
))
1965 return REG_REQ_ALREADY_SET
;
1967 return REG_REQ_INTERSECT
;
1971 * reg_process_hint_driver - process driver regulatory requests
1972 * @driver_request: a pending driver regulatory request
1974 * The wireless subsystem can use this function to process
1975 * a regulatory request issued by an 802.11 driver.
1977 * Returns one of the different reg request treatment values.
1979 static enum reg_request_treatment
1980 reg_process_hint_driver(struct wiphy
*wiphy
,
1981 struct regulatory_request
*driver_request
)
1983 const struct ieee80211_regdomain
*regd
, *tmp
;
1984 enum reg_request_treatment treatment
;
1986 treatment
= __reg_process_hint_driver(driver_request
);
1988 switch (treatment
) {
1991 case REG_REQ_IGNORE
:
1992 reg_free_request(driver_request
);
1994 case REG_REQ_INTERSECT
:
1996 case REG_REQ_ALREADY_SET
:
1997 regd
= reg_copy_regd(get_cfg80211_regdom());
1999 reg_free_request(driver_request
);
2000 return REG_REQ_IGNORE
;
2003 tmp
= get_wiphy_regdom(wiphy
);
2004 rcu_assign_pointer(wiphy
->regd
, regd
);
2005 rcu_free_regdom(tmp
);
2009 driver_request
->intersect
= treatment
== REG_REQ_INTERSECT
;
2010 driver_request
->processed
= false;
2013 * Since CRDA will not be called in this case as we already
2014 * have applied the requested regulatory domain before we just
2015 * inform userspace we have processed the request
2017 if (treatment
== REG_REQ_ALREADY_SET
) {
2018 nl80211_send_reg_change_event(driver_request
);
2019 reg_update_last_request(driver_request
);
2020 reg_set_request_processed();
2024 if (reg_query_database(driver_request
))
2025 reg_update_last_request(driver_request
);
2027 reg_free_request(driver_request
);
2032 static enum reg_request_treatment
2033 __reg_process_hint_country_ie(struct wiphy
*wiphy
,
2034 struct regulatory_request
*country_ie_request
)
2036 struct wiphy
*last_wiphy
= NULL
;
2037 struct regulatory_request
*lr
= get_last_request();
2039 if (reg_request_cell_base(lr
)) {
2040 /* Trust a Cell base station over the AP's country IE */
2041 if (regdom_changes(country_ie_request
->alpha2
))
2042 return REG_REQ_IGNORE
;
2043 return REG_REQ_ALREADY_SET
;
2045 if (wiphy
->regulatory_flags
& REGULATORY_COUNTRY_IE_IGNORE
)
2046 return REG_REQ_IGNORE
;
2049 if (unlikely(!is_an_alpha2(country_ie_request
->alpha2
)))
2052 if (lr
->initiator
!= NL80211_REGDOM_SET_BY_COUNTRY_IE
)
2055 last_wiphy
= wiphy_idx_to_wiphy(lr
->wiphy_idx
);
2057 if (last_wiphy
!= wiphy
) {
2059 * Two cards with two APs claiming different
2060 * Country IE alpha2s. We could
2061 * intersect them, but that seems unlikely
2062 * to be correct. Reject second one for now.
2064 if (regdom_changes(country_ie_request
->alpha2
))
2065 return REG_REQ_IGNORE
;
2066 return REG_REQ_ALREADY_SET
;
2069 if (regdom_changes(country_ie_request
->alpha2
))
2071 return REG_REQ_ALREADY_SET
;
2075 * reg_process_hint_country_ie - process regulatory requests from country IEs
2076 * @country_ie_request: a regulatory request from a country IE
2078 * The wireless subsystem can use this function to process
2079 * a regulatory request issued by a country Information Element.
2081 * Returns one of the different reg request treatment values.
2083 static enum reg_request_treatment
2084 reg_process_hint_country_ie(struct wiphy
*wiphy
,
2085 struct regulatory_request
*country_ie_request
)
2087 enum reg_request_treatment treatment
;
2089 treatment
= __reg_process_hint_country_ie(wiphy
, country_ie_request
);
2091 switch (treatment
) {
2094 case REG_REQ_IGNORE
:
2096 case REG_REQ_ALREADY_SET
:
2097 reg_free_request(country_ie_request
);
2099 case REG_REQ_INTERSECT
:
2100 reg_free_request(country_ie_request
);
2102 * This doesn't happen yet, not sure we
2103 * ever want to support it for this case.
2105 WARN_ONCE(1, "Unexpected intersection for country IEs");
2106 return REG_REQ_IGNORE
;
2109 country_ie_request
->intersect
= false;
2110 country_ie_request
->processed
= false;
2112 if (reg_query_database(country_ie_request
))
2113 reg_update_last_request(country_ie_request
);
2115 reg_free_request(country_ie_request
);
2120 /* This processes *all* regulatory hints */
2121 static void reg_process_hint(struct regulatory_request
*reg_request
)
2123 struct wiphy
*wiphy
= NULL
;
2124 enum reg_request_treatment treatment
;
2126 if (reg_request
->wiphy_idx
!= WIPHY_IDX_INVALID
)
2127 wiphy
= wiphy_idx_to_wiphy(reg_request
->wiphy_idx
);
2129 switch (reg_request
->initiator
) {
2130 case NL80211_REGDOM_SET_BY_CORE
:
2131 reg_process_hint_core(reg_request
);
2133 case NL80211_REGDOM_SET_BY_USER
:
2134 reg_process_hint_user(reg_request
);
2136 case NL80211_REGDOM_SET_BY_DRIVER
:
2139 treatment
= reg_process_hint_driver(wiphy
, reg_request
);
2141 case NL80211_REGDOM_SET_BY_COUNTRY_IE
:
2144 treatment
= reg_process_hint_country_ie(wiphy
, reg_request
);
2147 WARN(1, "invalid initiator %d\n", reg_request
->initiator
);
2151 /* This is required so that the orig_* parameters are saved.
2152 * NOTE: treatment must be set for any case that reaches here!
2154 if (treatment
== REG_REQ_ALREADY_SET
&& wiphy
&&
2155 wiphy
->regulatory_flags
& REGULATORY_STRICT_REG
) {
2156 wiphy_update_regulatory(wiphy
, reg_request
->initiator
);
2157 reg_check_channels();
2163 reg_free_request(reg_request
);
2166 static bool reg_only_self_managed_wiphys(void)
2168 struct cfg80211_registered_device
*rdev
;
2169 struct wiphy
*wiphy
;
2170 bool self_managed_found
= false;
2174 list_for_each_entry(rdev
, &cfg80211_rdev_list
, list
) {
2175 wiphy
= &rdev
->wiphy
;
2176 if (wiphy
->regulatory_flags
& REGULATORY_WIPHY_SELF_MANAGED
)
2177 self_managed_found
= true;
2182 /* make sure at least one self-managed wiphy exists */
2183 return self_managed_found
;
2187 * Processes regulatory hints, this is all the NL80211_REGDOM_SET_BY_*
2188 * Regulatory hints come on a first come first serve basis and we
2189 * must process each one atomically.
2191 static void reg_process_pending_hints(void)
2193 struct regulatory_request
*reg_request
, *lr
;
2195 lr
= get_last_request();
2197 /* When last_request->processed becomes true this will be rescheduled */
2198 if (lr
&& !lr
->processed
) {
2199 reg_process_hint(lr
);
2203 spin_lock(®_requests_lock
);
2205 if (list_empty(®_requests_list
)) {
2206 spin_unlock(®_requests_lock
);
2210 reg_request
= list_first_entry(®_requests_list
,
2211 struct regulatory_request
,
2213 list_del_init(®_request
->list
);
2215 spin_unlock(®_requests_lock
);
2217 if (reg_only_self_managed_wiphys()) {
2218 reg_free_request(reg_request
);
2222 reg_process_hint(reg_request
);
2224 lr
= get_last_request();
2226 spin_lock(®_requests_lock
);
2227 if (!list_empty(®_requests_list
) && lr
&& lr
->processed
)
2228 schedule_work(®_work
);
2229 spin_unlock(®_requests_lock
);
2232 /* Processes beacon hints -- this has nothing to do with country IEs */
2233 static void reg_process_pending_beacon_hints(void)
2235 struct cfg80211_registered_device
*rdev
;
2236 struct reg_beacon
*pending_beacon
, *tmp
;
2238 /* This goes through the _pending_ beacon list */
2239 spin_lock_bh(®_pending_beacons_lock
);
2241 list_for_each_entry_safe(pending_beacon
, tmp
,
2242 ®_pending_beacons
, list
) {
2243 list_del_init(&pending_beacon
->list
);
2245 /* Applies the beacon hint to current wiphys */
2246 list_for_each_entry(rdev
, &cfg80211_rdev_list
, list
)
2247 wiphy_update_new_beacon(&rdev
->wiphy
, pending_beacon
);
2249 /* Remembers the beacon hint for new wiphys or reg changes */
2250 list_add_tail(&pending_beacon
->list
, ®_beacon_list
);
2253 spin_unlock_bh(®_pending_beacons_lock
);
2256 static void reg_process_self_managed_hints(void)
2258 struct cfg80211_registered_device
*rdev
;
2259 struct wiphy
*wiphy
;
2260 const struct ieee80211_regdomain
*tmp
;
2261 const struct ieee80211_regdomain
*regd
;
2262 enum ieee80211_band band
;
2263 struct regulatory_request request
= {};
2265 list_for_each_entry(rdev
, &cfg80211_rdev_list
, list
) {
2266 wiphy
= &rdev
->wiphy
;
2268 spin_lock(®_requests_lock
);
2269 regd
= rdev
->requested_regd
;
2270 rdev
->requested_regd
= NULL
;
2271 spin_unlock(®_requests_lock
);
2276 tmp
= get_wiphy_regdom(wiphy
);
2277 rcu_assign_pointer(wiphy
->regd
, regd
);
2278 rcu_free_regdom(tmp
);
2280 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++)
2281 handle_band_custom(wiphy
, wiphy
->bands
[band
], regd
);
2283 reg_process_ht_flags(wiphy
);
2285 request
.wiphy_idx
= get_wiphy_idx(wiphy
);
2286 request
.alpha2
[0] = regd
->alpha2
[0];
2287 request
.alpha2
[1] = regd
->alpha2
[1];
2288 request
.initiator
= NL80211_REGDOM_SET_BY_DRIVER
;
2290 nl80211_send_wiphy_reg_change_event(&request
);
2293 reg_check_channels();
2296 static void reg_todo(struct work_struct
*work
)
2299 reg_process_pending_hints();
2300 reg_process_pending_beacon_hints();
2301 reg_process_self_managed_hints();
2305 static void queue_regulatory_request(struct regulatory_request
*request
)
2307 request
->alpha2
[0] = toupper(request
->alpha2
[0]);
2308 request
->alpha2
[1] = toupper(request
->alpha2
[1]);
2310 spin_lock(®_requests_lock
);
2311 list_add_tail(&request
->list
, ®_requests_list
);
2312 spin_unlock(®_requests_lock
);
2314 schedule_work(®_work
);
2318 * Core regulatory hint -- happens during cfg80211_init()
2319 * and when we restore regulatory settings.
2321 static int regulatory_hint_core(const char *alpha2
)
2323 struct regulatory_request
*request
;
2325 request
= kzalloc(sizeof(struct regulatory_request
), GFP_KERNEL
);
2329 request
->alpha2
[0] = alpha2
[0];
2330 request
->alpha2
[1] = alpha2
[1];
2331 request
->initiator
= NL80211_REGDOM_SET_BY_CORE
;
2333 queue_regulatory_request(request
);
2339 int regulatory_hint_user(const char *alpha2
,
2340 enum nl80211_user_reg_hint_type user_reg_hint_type
)
2342 struct regulatory_request
*request
;
2344 if (WARN_ON(!alpha2
))
2347 request
= kzalloc(sizeof(struct regulatory_request
), GFP_KERNEL
);
2351 request
->wiphy_idx
= WIPHY_IDX_INVALID
;
2352 request
->alpha2
[0] = alpha2
[0];
2353 request
->alpha2
[1] = alpha2
[1];
2354 request
->initiator
= NL80211_REGDOM_SET_BY_USER
;
2355 request
->user_reg_hint_type
= user_reg_hint_type
;
2357 /* Allow calling CRDA again */
2358 reg_crda_timeouts
= 0;
2360 queue_regulatory_request(request
);
2365 int regulatory_hint_indoor(bool is_indoor
, u32 portid
)
2367 spin_lock(®_indoor_lock
);
2369 /* It is possible that more than one user space process is trying to
2370 * configure the indoor setting. To handle such cases, clear the indoor
2371 * setting in case that some process does not think that the device
2372 * is operating in an indoor environment. In addition, if a user space
2373 * process indicates that it is controlling the indoor setting, save its
2374 * portid, i.e., make it the owner.
2376 reg_is_indoor
= is_indoor
;
2377 if (reg_is_indoor
) {
2378 if (!reg_is_indoor_portid
)
2379 reg_is_indoor_portid
= portid
;
2381 reg_is_indoor_portid
= 0;
2384 spin_unlock(®_indoor_lock
);
2387 reg_check_channels();
2392 void regulatory_netlink_notify(u32 portid
)
2394 spin_lock(®_indoor_lock
);
2396 if (reg_is_indoor_portid
!= portid
) {
2397 spin_unlock(®_indoor_lock
);
2401 reg_is_indoor
= false;
2402 reg_is_indoor_portid
= 0;
2404 spin_unlock(®_indoor_lock
);
2406 reg_check_channels();
2410 int regulatory_hint(struct wiphy
*wiphy
, const char *alpha2
)
2412 struct regulatory_request
*request
;
2414 if (WARN_ON(!alpha2
|| !wiphy
))
2417 wiphy
->regulatory_flags
&= ~REGULATORY_CUSTOM_REG
;
2419 request
= kzalloc(sizeof(struct regulatory_request
), GFP_KERNEL
);
2423 request
->wiphy_idx
= get_wiphy_idx(wiphy
);
2425 request
->alpha2
[0] = alpha2
[0];
2426 request
->alpha2
[1] = alpha2
[1];
2427 request
->initiator
= NL80211_REGDOM_SET_BY_DRIVER
;
2429 /* Allow calling CRDA again */
2430 reg_crda_timeouts
= 0;
2432 queue_regulatory_request(request
);
2436 EXPORT_SYMBOL(regulatory_hint
);
2438 void regulatory_hint_country_ie(struct wiphy
*wiphy
, enum ieee80211_band band
,
2439 const u8
*country_ie
, u8 country_ie_len
)
2442 enum environment_cap env
= ENVIRON_ANY
;
2443 struct regulatory_request
*request
= NULL
, *lr
;
2445 /* IE len must be evenly divisible by 2 */
2446 if (country_ie_len
& 0x01)
2449 if (country_ie_len
< IEEE80211_COUNTRY_IE_MIN_LEN
)
2452 request
= kzalloc(sizeof(*request
), GFP_KERNEL
);
2456 alpha2
[0] = country_ie
[0];
2457 alpha2
[1] = country_ie
[1];
2459 if (country_ie
[2] == 'I')
2460 env
= ENVIRON_INDOOR
;
2461 else if (country_ie
[2] == 'O')
2462 env
= ENVIRON_OUTDOOR
;
2465 lr
= get_last_request();
2471 * We will run this only upon a successful connection on cfg80211.
2472 * We leave conflict resolution to the workqueue, where can hold
2475 if (lr
->initiator
== NL80211_REGDOM_SET_BY_COUNTRY_IE
&&
2476 lr
->wiphy_idx
!= WIPHY_IDX_INVALID
)
2479 request
->wiphy_idx
= get_wiphy_idx(wiphy
);
2480 request
->alpha2
[0] = alpha2
[0];
2481 request
->alpha2
[1] = alpha2
[1];
2482 request
->initiator
= NL80211_REGDOM_SET_BY_COUNTRY_IE
;
2483 request
->country_ie_env
= env
;
2485 /* Allow calling CRDA again */
2486 reg_crda_timeouts
= 0;
2488 queue_regulatory_request(request
);
2495 static void restore_alpha2(char *alpha2
, bool reset_user
)
2497 /* indicates there is no alpha2 to consider for restoration */
2501 /* The user setting has precedence over the module parameter */
2502 if (is_user_regdom_saved()) {
2503 /* Unless we're asked to ignore it and reset it */
2505 REG_DBG_PRINT("Restoring regulatory settings including user preference\n");
2506 user_alpha2
[0] = '9';
2507 user_alpha2
[1] = '7';
2510 * If we're ignoring user settings, we still need to
2511 * check the module parameter to ensure we put things
2512 * back as they were for a full restore.
2514 if (!is_world_regdom(ieee80211_regdom
)) {
2515 REG_DBG_PRINT("Keeping preference on module parameter ieee80211_regdom: %c%c\n",
2516 ieee80211_regdom
[0], ieee80211_regdom
[1]);
2517 alpha2
[0] = ieee80211_regdom
[0];
2518 alpha2
[1] = ieee80211_regdom
[1];
2521 REG_DBG_PRINT("Restoring regulatory settings while preserving user preference for: %c%c\n",
2522 user_alpha2
[0], user_alpha2
[1]);
2523 alpha2
[0] = user_alpha2
[0];
2524 alpha2
[1] = user_alpha2
[1];
2526 } else if (!is_world_regdom(ieee80211_regdom
)) {
2527 REG_DBG_PRINT("Keeping preference on module parameter ieee80211_regdom: %c%c\n",
2528 ieee80211_regdom
[0], ieee80211_regdom
[1]);
2529 alpha2
[0] = ieee80211_regdom
[0];
2530 alpha2
[1] = ieee80211_regdom
[1];
2532 REG_DBG_PRINT("Restoring regulatory settings\n");
2535 static void restore_custom_reg_settings(struct wiphy
*wiphy
)
2537 struct ieee80211_supported_band
*sband
;
2538 enum ieee80211_band band
;
2539 struct ieee80211_channel
*chan
;
2542 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++) {
2543 sband
= wiphy
->bands
[band
];
2546 for (i
= 0; i
< sband
->n_channels
; i
++) {
2547 chan
= &sband
->channels
[i
];
2548 chan
->flags
= chan
->orig_flags
;
2549 chan
->max_antenna_gain
= chan
->orig_mag
;
2550 chan
->max_power
= chan
->orig_mpwr
;
2551 chan
->beacon_found
= false;
2557 * Restoring regulatory settings involves ingoring any
2558 * possibly stale country IE information and user regulatory
2559 * settings if so desired, this includes any beacon hints
2560 * learned as we could have traveled outside to another country
2561 * after disconnection. To restore regulatory settings we do
2562 * exactly what we did at bootup:
2564 * - send a core regulatory hint
2565 * - send a user regulatory hint if applicable
2567 * Device drivers that send a regulatory hint for a specific country
2568 * keep their own regulatory domain on wiphy->regd so that does does
2569 * not need to be remembered.
2571 static void restore_regulatory_settings(bool reset_user
)
2574 char world_alpha2
[2];
2575 struct reg_beacon
*reg_beacon
, *btmp
;
2576 LIST_HEAD(tmp_reg_req_list
);
2577 struct cfg80211_registered_device
*rdev
;
2582 * Clear the indoor setting in case that it is not controlled by user
2583 * space, as otherwise there is no guarantee that the device is still
2584 * operating in an indoor environment.
2586 spin_lock(®_indoor_lock
);
2587 if (reg_is_indoor
&& !reg_is_indoor_portid
) {
2588 reg_is_indoor
= false;
2589 reg_check_channels();
2591 spin_unlock(®_indoor_lock
);
2593 reset_regdomains(true, &world_regdom
);
2594 restore_alpha2(alpha2
, reset_user
);
2597 * If there's any pending requests we simply
2598 * stash them to a temporary pending queue and
2599 * add then after we've restored regulatory
2602 spin_lock(®_requests_lock
);
2603 list_splice_tail_init(®_requests_list
, &tmp_reg_req_list
);
2604 spin_unlock(®_requests_lock
);
2606 /* Clear beacon hints */
2607 spin_lock_bh(®_pending_beacons_lock
);
2608 list_for_each_entry_safe(reg_beacon
, btmp
, ®_pending_beacons
, list
) {
2609 list_del(®_beacon
->list
);
2612 spin_unlock_bh(®_pending_beacons_lock
);
2614 list_for_each_entry_safe(reg_beacon
, btmp
, ®_beacon_list
, list
) {
2615 list_del(®_beacon
->list
);
2619 /* First restore to the basic regulatory settings */
2620 world_alpha2
[0] = cfg80211_world_regdom
->alpha2
[0];
2621 world_alpha2
[1] = cfg80211_world_regdom
->alpha2
[1];
2623 list_for_each_entry(rdev
, &cfg80211_rdev_list
, list
) {
2624 if (rdev
->wiphy
.regulatory_flags
& REGULATORY_WIPHY_SELF_MANAGED
)
2626 if (rdev
->wiphy
.regulatory_flags
& REGULATORY_CUSTOM_REG
)
2627 restore_custom_reg_settings(&rdev
->wiphy
);
2630 regulatory_hint_core(world_alpha2
);
2633 * This restores the ieee80211_regdom module parameter
2634 * preference or the last user requested regulatory
2635 * settings, user regulatory settings takes precedence.
2637 if (is_an_alpha2(alpha2
))
2638 regulatory_hint_user(alpha2
, NL80211_USER_REG_HINT_USER
);
2640 spin_lock(®_requests_lock
);
2641 list_splice_tail_init(&tmp_reg_req_list
, ®_requests_list
);
2642 spin_unlock(®_requests_lock
);
2644 REG_DBG_PRINT("Kicking the queue\n");
2646 schedule_work(®_work
);
2649 void regulatory_hint_disconnect(void)
2651 REG_DBG_PRINT("All devices are disconnected, going to restore regulatory settings\n");
2652 restore_regulatory_settings(false);
2655 static bool freq_is_chan_12_13_14(u16 freq
)
2657 if (freq
== ieee80211_channel_to_frequency(12, IEEE80211_BAND_2GHZ
) ||
2658 freq
== ieee80211_channel_to_frequency(13, IEEE80211_BAND_2GHZ
) ||
2659 freq
== ieee80211_channel_to_frequency(14, IEEE80211_BAND_2GHZ
))
2664 static bool pending_reg_beacon(struct ieee80211_channel
*beacon_chan
)
2666 struct reg_beacon
*pending_beacon
;
2668 list_for_each_entry(pending_beacon
, ®_pending_beacons
, list
)
2669 if (beacon_chan
->center_freq
==
2670 pending_beacon
->chan
.center_freq
)
2675 int regulatory_hint_found_beacon(struct wiphy
*wiphy
,
2676 struct ieee80211_channel
*beacon_chan
,
2679 struct reg_beacon
*reg_beacon
;
2682 if (beacon_chan
->beacon_found
||
2683 beacon_chan
->flags
& IEEE80211_CHAN_RADAR
||
2684 (beacon_chan
->band
== IEEE80211_BAND_2GHZ
&&
2685 !freq_is_chan_12_13_14(beacon_chan
->center_freq
)))
2688 spin_lock_bh(®_pending_beacons_lock
);
2689 processing
= pending_reg_beacon(beacon_chan
);
2690 spin_unlock_bh(®_pending_beacons_lock
);
2695 reg_beacon
= kzalloc(sizeof(struct reg_beacon
), gfp
);
2699 REG_DBG_PRINT("Found new beacon on frequency: %d MHz (Ch %d) on %s\n",
2700 beacon_chan
->center_freq
,
2701 ieee80211_frequency_to_channel(beacon_chan
->center_freq
),
2704 memcpy(®_beacon
->chan
, beacon_chan
,
2705 sizeof(struct ieee80211_channel
));
2708 * Since we can be called from BH or and non-BH context
2709 * we must use spin_lock_bh()
2711 spin_lock_bh(®_pending_beacons_lock
);
2712 list_add_tail(®_beacon
->list
, ®_pending_beacons
);
2713 spin_unlock_bh(®_pending_beacons_lock
);
2715 schedule_work(®_work
);
2720 static void print_rd_rules(const struct ieee80211_regdomain
*rd
)
2723 const struct ieee80211_reg_rule
*reg_rule
= NULL
;
2724 const struct ieee80211_freq_range
*freq_range
= NULL
;
2725 const struct ieee80211_power_rule
*power_rule
= NULL
;
2726 char bw
[32], cac_time
[32];
2728 pr_info(" (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp), (dfs_cac_time)\n");
2730 for (i
= 0; i
< rd
->n_reg_rules
; i
++) {
2731 reg_rule
= &rd
->reg_rules
[i
];
2732 freq_range
= ®_rule
->freq_range
;
2733 power_rule
= ®_rule
->power_rule
;
2735 if (reg_rule
->flags
& NL80211_RRF_AUTO_BW
)
2736 snprintf(bw
, sizeof(bw
), "%d KHz, %d KHz AUTO",
2737 freq_range
->max_bandwidth_khz
,
2738 reg_get_max_bandwidth(rd
, reg_rule
));
2740 snprintf(bw
, sizeof(bw
), "%d KHz",
2741 freq_range
->max_bandwidth_khz
);
2743 if (reg_rule
->flags
& NL80211_RRF_DFS
)
2744 scnprintf(cac_time
, sizeof(cac_time
), "%u s",
2745 reg_rule
->dfs_cac_ms
/1000);
2747 scnprintf(cac_time
, sizeof(cac_time
), "N/A");
2751 * There may not be documentation for max antenna gain
2752 * in certain regions
2754 if (power_rule
->max_antenna_gain
)
2755 pr_info(" (%d KHz - %d KHz @ %s), (%d mBi, %d mBm), (%s)\n",
2756 freq_range
->start_freq_khz
,
2757 freq_range
->end_freq_khz
,
2759 power_rule
->max_antenna_gain
,
2760 power_rule
->max_eirp
,
2763 pr_info(" (%d KHz - %d KHz @ %s), (N/A, %d mBm), (%s)\n",
2764 freq_range
->start_freq_khz
,
2765 freq_range
->end_freq_khz
,
2767 power_rule
->max_eirp
,
2772 bool reg_supported_dfs_region(enum nl80211_dfs_regions dfs_region
)
2774 switch (dfs_region
) {
2775 case NL80211_DFS_UNSET
:
2776 case NL80211_DFS_FCC
:
2777 case NL80211_DFS_ETSI
:
2778 case NL80211_DFS_JP
:
2781 REG_DBG_PRINT("Ignoring uknown DFS master region: %d\n",
2787 static void print_regdomain(const struct ieee80211_regdomain
*rd
)
2789 struct regulatory_request
*lr
= get_last_request();
2791 if (is_intersected_alpha2(rd
->alpha2
)) {
2792 if (lr
->initiator
== NL80211_REGDOM_SET_BY_COUNTRY_IE
) {
2793 struct cfg80211_registered_device
*rdev
;
2794 rdev
= cfg80211_rdev_by_wiphy_idx(lr
->wiphy_idx
);
2796 pr_info("Current regulatory domain updated by AP to: %c%c\n",
2797 rdev
->country_ie_alpha2
[0],
2798 rdev
->country_ie_alpha2
[1]);
2800 pr_info("Current regulatory domain intersected:\n");
2802 pr_info("Current regulatory domain intersected:\n");
2803 } else if (is_world_regdom(rd
->alpha2
)) {
2804 pr_info("World regulatory domain updated:\n");
2806 if (is_unknown_alpha2(rd
->alpha2
))
2807 pr_info("Regulatory domain changed to driver built-in settings (unknown country)\n");
2809 if (reg_request_cell_base(lr
))
2810 pr_info("Regulatory domain changed to country: %c%c by Cell Station\n",
2811 rd
->alpha2
[0], rd
->alpha2
[1]);
2813 pr_info("Regulatory domain changed to country: %c%c\n",
2814 rd
->alpha2
[0], rd
->alpha2
[1]);
2818 pr_info(" DFS Master region: %s", reg_dfs_region_str(rd
->dfs_region
));
2822 static void print_regdomain_info(const struct ieee80211_regdomain
*rd
)
2824 pr_info("Regulatory domain: %c%c\n", rd
->alpha2
[0], rd
->alpha2
[1]);
2828 static int reg_set_rd_core(const struct ieee80211_regdomain
*rd
)
2830 if (!is_world_regdom(rd
->alpha2
))
2832 update_world_regdomain(rd
);
2836 static int reg_set_rd_user(const struct ieee80211_regdomain
*rd
,
2837 struct regulatory_request
*user_request
)
2839 const struct ieee80211_regdomain
*intersected_rd
= NULL
;
2841 if (!regdom_changes(rd
->alpha2
))
2844 if (!is_valid_rd(rd
)) {
2845 pr_err("Invalid regulatory domain detected:\n");
2846 print_regdomain_info(rd
);
2850 if (!user_request
->intersect
) {
2851 reset_regdomains(false, rd
);
2855 intersected_rd
= regdom_intersect(rd
, get_cfg80211_regdom());
2856 if (!intersected_rd
)
2861 reset_regdomains(false, intersected_rd
);
2866 static int reg_set_rd_driver(const struct ieee80211_regdomain
*rd
,
2867 struct regulatory_request
*driver_request
)
2869 const struct ieee80211_regdomain
*regd
;
2870 const struct ieee80211_regdomain
*intersected_rd
= NULL
;
2871 const struct ieee80211_regdomain
*tmp
;
2872 struct wiphy
*request_wiphy
;
2874 if (is_world_regdom(rd
->alpha2
))
2877 if (!regdom_changes(rd
->alpha2
))
2880 if (!is_valid_rd(rd
)) {
2881 pr_err("Invalid regulatory domain detected:\n");
2882 print_regdomain_info(rd
);
2886 request_wiphy
= wiphy_idx_to_wiphy(driver_request
->wiphy_idx
);
2887 if (!request_wiphy
) {
2888 queue_delayed_work(system_power_efficient_wq
,
2893 if (!driver_request
->intersect
) {
2894 if (request_wiphy
->regd
)
2897 regd
= reg_copy_regd(rd
);
2899 return PTR_ERR(regd
);
2901 rcu_assign_pointer(request_wiphy
->regd
, regd
);
2902 reset_regdomains(false, rd
);
2906 intersected_rd
= regdom_intersect(rd
, get_cfg80211_regdom());
2907 if (!intersected_rd
)
2911 * We can trash what CRDA provided now.
2912 * However if a driver requested this specific regulatory
2913 * domain we keep it for its private use
2915 tmp
= get_wiphy_regdom(request_wiphy
);
2916 rcu_assign_pointer(request_wiphy
->regd
, rd
);
2917 rcu_free_regdom(tmp
);
2921 reset_regdomains(false, intersected_rd
);
2926 static int reg_set_rd_country_ie(const struct ieee80211_regdomain
*rd
,
2927 struct regulatory_request
*country_ie_request
)
2929 struct wiphy
*request_wiphy
;
2931 if (!is_alpha2_set(rd
->alpha2
) && !is_an_alpha2(rd
->alpha2
) &&
2932 !is_unknown_alpha2(rd
->alpha2
))
2936 * Lets only bother proceeding on the same alpha2 if the current
2937 * rd is non static (it means CRDA was present and was used last)
2938 * and the pending request came in from a country IE
2941 if (!is_valid_rd(rd
)) {
2942 pr_err("Invalid regulatory domain detected:\n");
2943 print_regdomain_info(rd
);
2947 request_wiphy
= wiphy_idx_to_wiphy(country_ie_request
->wiphy_idx
);
2948 if (!request_wiphy
) {
2949 queue_delayed_work(system_power_efficient_wq
,
2954 if (country_ie_request
->intersect
)
2957 reset_regdomains(false, rd
);
2962 * Use this call to set the current regulatory domain. Conflicts with
2963 * multiple drivers can be ironed out later. Caller must've already
2964 * kmalloc'd the rd structure.
2966 int set_regdom(const struct ieee80211_regdomain
*rd
,
2967 enum ieee80211_regd_source regd_src
)
2969 struct regulatory_request
*lr
;
2970 bool user_reset
= false;
2973 if (!reg_is_valid_request(rd
->alpha2
)) {
2978 if (regd_src
== REGD_SOURCE_CRDA
)
2979 reg_crda_timeouts
= 0;
2981 lr
= get_last_request();
2983 /* Note that this doesn't update the wiphys, this is done below */
2984 switch (lr
->initiator
) {
2985 case NL80211_REGDOM_SET_BY_CORE
:
2986 r
= reg_set_rd_core(rd
);
2988 case NL80211_REGDOM_SET_BY_USER
:
2989 r
= reg_set_rd_user(rd
, lr
);
2992 case NL80211_REGDOM_SET_BY_DRIVER
:
2993 r
= reg_set_rd_driver(rd
, lr
);
2995 case NL80211_REGDOM_SET_BY_COUNTRY_IE
:
2996 r
= reg_set_rd_country_ie(rd
, lr
);
2999 WARN(1, "invalid initiator %d\n", lr
->initiator
);
3006 reg_set_request_processed();
3009 /* Back to world regulatory in case of errors */
3010 restore_regulatory_settings(user_reset
);
3017 /* This would make this whole thing pointless */
3018 if (WARN_ON(!lr
->intersect
&& rd
!= get_cfg80211_regdom()))
3021 /* update all wiphys now with the new established regulatory domain */
3022 update_all_wiphy_regulatory(lr
->initiator
);
3024 print_regdomain(get_cfg80211_regdom());
3026 nl80211_send_reg_change_event(lr
);
3028 reg_set_request_processed();
3033 static int __regulatory_set_wiphy_regd(struct wiphy
*wiphy
,
3034 struct ieee80211_regdomain
*rd
)
3036 const struct ieee80211_regdomain
*regd
;
3037 const struct ieee80211_regdomain
*prev_regd
;
3038 struct cfg80211_registered_device
*rdev
;
3040 if (WARN_ON(!wiphy
|| !rd
))
3043 if (WARN(!(wiphy
->regulatory_flags
& REGULATORY_WIPHY_SELF_MANAGED
),
3044 "wiphy should have REGULATORY_WIPHY_SELF_MANAGED\n"))
3047 if (WARN(!is_valid_rd(rd
), "Invalid regulatory domain detected\n")) {
3048 print_regdomain_info(rd
);
3052 regd
= reg_copy_regd(rd
);
3054 return PTR_ERR(regd
);
3056 rdev
= wiphy_to_rdev(wiphy
);
3058 spin_lock(®_requests_lock
);
3059 prev_regd
= rdev
->requested_regd
;
3060 rdev
->requested_regd
= regd
;
3061 spin_unlock(®_requests_lock
);
3067 int regulatory_set_wiphy_regd(struct wiphy
*wiphy
,
3068 struct ieee80211_regdomain
*rd
)
3070 int ret
= __regulatory_set_wiphy_regd(wiphy
, rd
);
3075 schedule_work(®_work
);
3078 EXPORT_SYMBOL(regulatory_set_wiphy_regd
);
3080 int regulatory_set_wiphy_regd_sync_rtnl(struct wiphy
*wiphy
,
3081 struct ieee80211_regdomain
*rd
)
3087 ret
= __regulatory_set_wiphy_regd(wiphy
, rd
);
3091 /* process the request immediately */
3092 reg_process_self_managed_hints();
3095 EXPORT_SYMBOL(regulatory_set_wiphy_regd_sync_rtnl
);
3097 void wiphy_regulatory_register(struct wiphy
*wiphy
)
3099 struct regulatory_request
*lr
;
3101 /* self-managed devices ignore external hints */
3102 if (wiphy
->regulatory_flags
& REGULATORY_WIPHY_SELF_MANAGED
)
3103 wiphy
->regulatory_flags
|= REGULATORY_DISABLE_BEACON_HINTS
|
3104 REGULATORY_COUNTRY_IE_IGNORE
;
3106 if (!reg_dev_ignore_cell_hint(wiphy
))
3107 reg_num_devs_support_basehint
++;
3109 lr
= get_last_request();
3110 wiphy_update_regulatory(wiphy
, lr
->initiator
);
3113 void wiphy_regulatory_deregister(struct wiphy
*wiphy
)
3115 struct wiphy
*request_wiphy
= NULL
;
3116 struct regulatory_request
*lr
;
3118 lr
= get_last_request();
3120 if (!reg_dev_ignore_cell_hint(wiphy
))
3121 reg_num_devs_support_basehint
--;
3123 rcu_free_regdom(get_wiphy_regdom(wiphy
));
3124 RCU_INIT_POINTER(wiphy
->regd
, NULL
);
3127 request_wiphy
= wiphy_idx_to_wiphy(lr
->wiphy_idx
);
3129 if (!request_wiphy
|| request_wiphy
!= wiphy
)
3132 lr
->wiphy_idx
= WIPHY_IDX_INVALID
;
3133 lr
->country_ie_env
= ENVIRON_ANY
;
3136 static void reg_timeout_work(struct work_struct
*work
)
3138 REG_DBG_PRINT("Timeout while waiting for CRDA to reply, restoring regulatory settings\n");
3140 reg_crda_timeouts
++;
3141 restore_regulatory_settings(true);
3146 * See http://www.fcc.gov/document/5-ghz-unlicensed-spectrum-unii, for
3147 * UNII band definitions
3149 int cfg80211_get_unii(int freq
)
3152 if (freq
>= 5150 && freq
<= 5250)
3156 if (freq
> 5250 && freq
<= 5350)
3160 if (freq
> 5350 && freq
<= 5470)
3164 if (freq
> 5470 && freq
<= 5725)
3168 if (freq
> 5725 && freq
<= 5825)
3174 bool regulatory_indoor_allowed(void)
3176 return reg_is_indoor
;
3179 int __init
regulatory_init(void)
3183 reg_pdev
= platform_device_register_simple("regulatory", 0, NULL
, 0);
3184 if (IS_ERR(reg_pdev
))
3185 return PTR_ERR(reg_pdev
);
3187 spin_lock_init(®_requests_lock
);
3188 spin_lock_init(®_pending_beacons_lock
);
3189 spin_lock_init(®_indoor_lock
);
3191 reg_regdb_size_check();
3193 rcu_assign_pointer(cfg80211_regdomain
, cfg80211_world_regdom
);
3195 user_alpha2
[0] = '9';
3196 user_alpha2
[1] = '7';
3198 /* We always try to get an update for the static regdomain */
3199 err
= regulatory_hint_core(cfg80211_world_regdom
->alpha2
);
3204 * N.B. kobject_uevent_env() can fail mainly for when we're out
3205 * memory which is handled and propagated appropriately above
3206 * but it can also fail during a netlink_broadcast() or during
3207 * early boot for call_usermodehelper(). For now treat these
3208 * errors as non-fatal.
3210 pr_err("kobject_uevent_env() was unable to call CRDA during init\n");
3214 * Finally, if the user set the module parameter treat it
3217 if (!is_world_regdom(ieee80211_regdom
))
3218 regulatory_hint_user(ieee80211_regdom
,
3219 NL80211_USER_REG_HINT_USER
);
3224 void regulatory_exit(void)
3226 struct regulatory_request
*reg_request
, *tmp
;
3227 struct reg_beacon
*reg_beacon
, *btmp
;
3229 cancel_work_sync(®_work
);
3230 cancel_delayed_work_sync(®_timeout
);
3231 cancel_delayed_work_sync(®_check_chans
);
3233 /* Lock to suppress warnings */
3235 reset_regdomains(true, NULL
);
3238 dev_set_uevent_suppress(®_pdev
->dev
, true);
3240 platform_device_unregister(reg_pdev
);
3242 list_for_each_entry_safe(reg_beacon
, btmp
, ®_pending_beacons
, list
) {
3243 list_del(®_beacon
->list
);
3247 list_for_each_entry_safe(reg_beacon
, btmp
, ®_beacon_list
, list
) {
3248 list_del(®_beacon
->list
);
3252 list_for_each_entry_safe(reg_request
, tmp
, ®_requests_list
, list
) {
3253 list_del(®_request
->list
);