blob: bc0ebd475fc407e9bc75ea91a185bb344d18c8ce [file] [log] [blame]
Johannes Berg8318d782008-01-24 19:38:38 +01001/*
2 * Copyright 2002-2005, Instant802 Networks, Inc.
3 * Copyright 2005-2006, Devicescape Software, Inc.
4 * Copyright 2007 Johannes Berg <johannes@sipsolutions.net>
Luis R. Rodriguez3b77d5e2011-12-20 12:23:38 -08005 * Copyright 2008-2011 Luis R. Rodriguez <mcgrof@qca.qualcomm.com>
Johannes Berg2740f0c2014-09-03 15:24:58 +03006 * Copyright 2013-2014 Intel Mobile Communications GmbH
Johannes Berg8318d782008-01-24 19:38:38 +01007 *
Luis R. Rodriguez3b77d5e2011-12-20 12:23:38 -08008 * 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.
11 *
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.
Johannes Berg8318d782008-01-24 19:38:38 +010019 */
20
Luis R. Rodriguez3b77d5e2011-12-20 12:23:38 -080021
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -070022/**
23 * DOC: Wireless regulatory infrastructure
Johannes Berg8318d782008-01-24 19:38:38 +010024 *
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.
29 *
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -070030 * 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.
33 *
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.
39 *
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.
43 *
Johannes Berg8318d782008-01-24 19:38:38 +010044 */
Joe Perchese9c02682010-11-16 19:56:49 -080045
46#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
47
Johannes Berg8318d782008-01-24 19:38:38 +010048#include <linux/kernel.h>
Paul Gortmakerbc3b2d72011-07-15 11:47:34 -040049#include <linux/export.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090050#include <linux/slab.h>
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -070051#include <linux/list.h>
John W. Linvillec61029c2010-08-05 14:26:24 -040052#include <linux/ctype.h>
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -070053#include <linux/nl80211.h>
54#include <linux/platform_device.h>
Paul Gortmakerd9b93842011-09-18 13:21:27 -040055#include <linux/moduleparam.h>
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -070056#include <net/cfg80211.h>
Johannes Berg8318d782008-01-24 19:38:38 +010057#include "core.h"
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -070058#include "reg.h"
Arik Nemtsovad932f02014-11-27 09:44:55 +020059#include "rdev-ops.h"
John W. Linville3b377ea2009-12-18 17:59:01 -050060#include "regdb.h"
Luis R. Rodriguez73d54c92009-03-09 22:07:42 -040061#include "nl80211.h"
Johannes Berg8318d782008-01-24 19:38:38 +010062
Arik Nemtsovad932f02014-11-27 09:44:55 +020063/*
64 * Grace period we give before making sure all current interfaces reside on
65 * channels allowed by the current regulatory domain.
66 */
67#define REG_ENFORCE_GRACE_MS 60000
68
Ilan Peer52616f22014-02-25 16:26:00 +020069/**
70 * enum reg_request_treatment - regulatory request treatment
71 *
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.
Ilan Peer52616f22014-02-25 16:26:00 +020078 */
Johannes Berg2f922122012-12-03 17:54:55 +010079enum reg_request_treatment {
80 REG_REQ_OK,
81 REG_REQ_IGNORE,
82 REG_REQ_INTERSECT,
83 REG_REQ_ALREADY_SET,
84};
85
Luis R. Rodrigueza0429942011-11-28 16:47:15 -050086static struct regulatory_request core_request_world = {
87 .initiator = NL80211_REGDOM_SET_BY_CORE,
88 .alpha2[0] = '0',
89 .alpha2[1] = '0',
90 .intersect = false,
91 .processed = true,
92 .country_ie_env = ENVIRON_ANY,
93};
94
Johannes Berg38fd2142013-05-10 19:17:17 +020095/*
96 * Receipt of information from last regulatory request,
97 * protected by RTNL (and can be accessed with RCU protection)
98 */
Johannes Bergc492db32012-12-06 16:29:25 +010099static struct regulatory_request __rcu *last_request =
Johannes Bergcec3f0e2014-12-12 12:26:25 +0100100 (void __force __rcu *)&core_request_world;
Johannes Berg734366d2008-09-15 10:56:48 +0200101
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700102/* To trigger userspace events */
103static struct platform_device *reg_pdev;
Johannes Berg8318d782008-01-24 19:38:38 +0100104
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -0500105/*
106 * Central wireless core regulatory domains, we only need two,
Johannes Berg734366d2008-09-15 10:56:48 +0200107 * the current one and a world regulatory domain in case we have no
Johannes Berge8da2bb2012-12-03 23:00:08 +0100108 * information to give us an alpha2.
Johannes Berg38fd2142013-05-10 19:17:17 +0200109 * (protected by RTNL, can be read under RCU)
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -0500110 */
Johannes Berg458f4f92012-12-06 15:47:38 +0100111const struct ieee80211_regdomain __rcu *cfg80211_regdomain;
Johannes Berg734366d2008-09-15 10:56:48 +0200112
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -0500113/*
Luis R. Rodriguez57b5ce02012-07-12 11:49:18 -0700114 * Number of devices that registered to the core
115 * that support cellular base station regulatory hints
Johannes Berg38fd2142013-05-10 19:17:17 +0200116 * (protected by RTNL)
Luis R. Rodriguez57b5ce02012-07-12 11:49:18 -0700117 */
118static int reg_num_devs_support_basehint;
119
Ilan Peer52616f22014-02-25 16:26:00 +0200120/*
121 * State variable indicating if the platform on which the devices
122 * are attached is operating in an indoor environment. The state variable
123 * is relevant for all registered devices.
Ilan Peer52616f22014-02-25 16:26:00 +0200124 */
125static bool reg_is_indoor;
Ilan peer05050752015-03-04 00:32:06 -0500126static spinlock_t reg_indoor_lock;
127
128/* Used to track the userspace process controlling the indoor setting */
129static u32 reg_is_indoor_portid;
Ilan Peer52616f22014-02-25 16:26:00 +0200130
Johannes Bergb6863032015-10-15 09:25:18 +0200131static void restore_regulatory_settings(bool reset_user);
Ilan peerc37722b2015-03-30 15:15:49 +0300132
Johannes Berg458f4f92012-12-06 15:47:38 +0100133static const struct ieee80211_regdomain *get_cfg80211_regdom(void)
134{
Johannes Berg38fd2142013-05-10 19:17:17 +0200135 return rtnl_dereference(cfg80211_regdomain);
Johannes Berg458f4f92012-12-06 15:47:38 +0100136}
137
Arik Nemtsovad30ca22014-12-15 19:25:59 +0200138const struct ieee80211_regdomain *get_wiphy_regdom(struct wiphy *wiphy)
Johannes Berg458f4f92012-12-06 15:47:38 +0100139{
Johannes Berg38fd2142013-05-10 19:17:17 +0200140 return rtnl_dereference(wiphy->regd);
Johannes Berg458f4f92012-12-06 15:47:38 +0100141}
142
Luis R. Rodriguez3ef121b2013-11-13 18:54:05 +0100143static const char *reg_dfs_region_str(enum nl80211_dfs_regions dfs_region)
144{
145 switch (dfs_region) {
146 case NL80211_DFS_UNSET:
147 return "unset";
148 case NL80211_DFS_FCC:
149 return "FCC";
150 case NL80211_DFS_ETSI:
151 return "ETSI";
152 case NL80211_DFS_JP:
153 return "JP";
154 }
155 return "Unknown";
156}
157
Luis R. Rodriguez6c474792013-11-25 20:56:09 +0100158enum nl80211_dfs_regions reg_get_dfs_region(struct wiphy *wiphy)
159{
160 const struct ieee80211_regdomain *regd = NULL;
161 const struct ieee80211_regdomain *wiphy_regd = NULL;
162
163 regd = get_cfg80211_regdom();
164 if (!wiphy)
165 goto out;
166
167 wiphy_regd = get_wiphy_regdom(wiphy);
168 if (!wiphy_regd)
169 goto out;
170
171 if (wiphy_regd->dfs_region == regd->dfs_region)
172 goto out;
173
Johannes Bergc799ba62015-12-11 15:31:10 +0100174 pr_debug("%s: device specific dfs_region (%s) disagrees with cfg80211's central dfs_region (%s)\n",
175 dev_name(&wiphy->dev),
176 reg_dfs_region_str(wiphy_regd->dfs_region),
177 reg_dfs_region_str(regd->dfs_region));
Luis R. Rodriguez6c474792013-11-25 20:56:09 +0100178
179out:
180 return regd->dfs_region;
181}
182
Johannes Berg458f4f92012-12-06 15:47:38 +0100183static void rcu_free_regdom(const struct ieee80211_regdomain *r)
184{
185 if (!r)
186 return;
187 kfree_rcu((struct ieee80211_regdomain *)r, rcu_head);
188}
189
Johannes Bergc492db32012-12-06 16:29:25 +0100190static struct regulatory_request *get_last_request(void)
191{
Johannes Berg38fd2142013-05-10 19:17:17 +0200192 return rcu_dereference_rtnl(last_request);
Johannes Bergc492db32012-12-06 16:29:25 +0100193}
194
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -0500195/* Used to queue up regulatory hints */
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -0500196static LIST_HEAD(reg_requests_list);
197static spinlock_t reg_requests_lock;
198
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -0500199/* Used to queue up beacon hints for review */
200static LIST_HEAD(reg_pending_beacons);
201static spinlock_t reg_pending_beacons_lock;
202
203/* Used to keep track of processed beacon hints */
204static LIST_HEAD(reg_beacon_list);
205
206struct reg_beacon {
207 struct list_head list;
208 struct ieee80211_channel chan;
209};
210
Arik Nemtsovad932f02014-11-27 09:44:55 +0200211static void reg_check_chans_work(struct work_struct *work);
212static DECLARE_DELAYED_WORK(reg_check_chans, reg_check_chans_work);
213
Luis R. Rodriguezf333a7a2010-11-17 21:46:07 -0800214static void reg_todo(struct work_struct *work);
215static DECLARE_WORK(reg_work, reg_todo);
216
Johannes Berg734366d2008-09-15 10:56:48 +0200217/* We keep a static world regulatory domain in case of the absence of CRDA */
218static const struct ieee80211_regdomain world_regdom = {
Jason Abele28981e52015-02-17 16:10:41 -0800219 .n_reg_rules = 8,
Johannes Berg734366d2008-09-15 10:56:48 +0200220 .alpha2 = "00",
221 .reg_rules = {
Luis R. Rodriguez68798a62009-02-21 00:20:37 -0500222 /* IEEE 802.11b/g, channels 1..11 */
223 REG_RULE(2412-10, 2462+10, 40, 6, 20, 0),
Johannes Berg43c771a2012-11-12 10:51:34 +0100224 /* IEEE 802.11b/g, channels 12..13. */
Johannes Bergc3826802015-12-11 17:35:50 +0100225 REG_RULE(2467-10, 2472+10, 20, 6, 20,
226 NL80211_RRF_NO_IR | NL80211_RRF_AUTO_BW),
Luis R. Rodriguez611b6a82009-03-05 21:19:21 -0800227 /* IEEE 802.11 channel 14 - Only JP enables
228 * this and for 802.11b only */
229 REG_RULE(2484-10, 2484+10, 20, 6, 20,
Luis R. Rodriguez8fe02e12013-10-21 19:22:25 +0200230 NL80211_RRF_NO_IR |
Luis R. Rodriguez611b6a82009-03-05 21:19:21 -0800231 NL80211_RRF_NO_OFDM),
232 /* IEEE 802.11a, channel 36..48 */
Johannes Bergc3826802015-12-11 17:35:50 +0100233 REG_RULE(5180-10, 5240+10, 80, 6, 20,
234 NL80211_RRF_NO_IR |
235 NL80211_RRF_AUTO_BW),
Luis R. Rodriguez3fc71f72009-02-21 00:20:38 -0500236
Johannes Berg131a19b2013-03-04 20:54:46 +0100237 /* IEEE 802.11a, channel 52..64 - DFS required */
Johannes Bergc3826802015-12-11 17:35:50 +0100238 REG_RULE(5260-10, 5320+10, 80, 6, 20,
Luis R. Rodriguez8fe02e12013-10-21 19:22:25 +0200239 NL80211_RRF_NO_IR |
Johannes Bergc3826802015-12-11 17:35:50 +0100240 NL80211_RRF_AUTO_BW |
Johannes Berg131a19b2013-03-04 20:54:46 +0100241 NL80211_RRF_DFS),
242
243 /* IEEE 802.11a, channel 100..144 - DFS required */
244 REG_RULE(5500-10, 5720+10, 160, 6, 20,
Luis R. Rodriguez8fe02e12013-10-21 19:22:25 +0200245 NL80211_RRF_NO_IR |
Johannes Berg131a19b2013-03-04 20:54:46 +0100246 NL80211_RRF_DFS),
Luis R. Rodriguez3fc71f72009-02-21 00:20:38 -0500247
248 /* IEEE 802.11a, channel 149..165 */
Johannes Berg8ab9d852012-12-03 22:09:22 +0100249 REG_RULE(5745-10, 5825+10, 80, 6, 20,
Luis R. Rodriguez8fe02e12013-10-21 19:22:25 +0200250 NL80211_RRF_NO_IR),
Vladimir Kondratiev90cdc6d2012-07-02 09:32:34 +0300251
Johannes Berg8047d262015-10-15 16:16:09 +0200252 /* IEEE 802.11ad (60GHz), channels 1..3 */
Vladimir Kondratiev90cdc6d2012-07-02 09:32:34 +0300253 REG_RULE(56160+2160*1-1080, 56160+2160*3+1080, 2160, 0, 0, 0),
Johannes Berg734366d2008-09-15 10:56:48 +0200254 }
255};
256
Johannes Berg38fd2142013-05-10 19:17:17 +0200257/* protected by RTNL */
Johannes Berga3d2eaf2008-09-15 11:10:52 +0200258static const struct ieee80211_regdomain *cfg80211_world_regdom =
259 &world_regdom;
Johannes Berg734366d2008-09-15 10:56:48 +0200260
Luis R. Rodriguez6ee7d332009-03-20 23:53:06 -0400261static char *ieee80211_regdom = "00";
Luis R. Rodriguez09d989d2010-01-29 19:58:57 -0500262static char user_alpha2[2];
Luis R. Rodriguez6ee7d332009-03-20 23:53:06 -0400263
Johannes Berg734366d2008-09-15 10:56:48 +0200264module_param(ieee80211_regdom, charp, 0444);
265MODULE_PARM_DESC(ieee80211_regdom, "IEEE 802.11 regulatory domain code");
266
Arik Nemtsovc8883932014-04-21 20:39:34 -0700267static void reg_free_request(struct regulatory_request *request)
Luis R. Rodriguez5ad6ef52013-11-05 09:18:08 -0800268{
Johannes Bergd34265a2015-10-15 13:05:55 +0200269 if (request == &core_request_world)
270 return;
271
Arik Nemtsovc8883932014-04-21 20:39:34 -0700272 if (request != get_last_request())
273 kfree(request);
274}
275
276static void reg_free_last_request(void)
277{
278 struct regulatory_request *lr = get_last_request();
279
Luis R. Rodriguez5ad6ef52013-11-05 09:18:08 -0800280 if (lr != &core_request_world && lr)
281 kfree_rcu(lr, rcu_head);
282}
283
Luis R. Rodriguez05f1a3e2013-11-05 09:18:09 -0800284static void reg_update_last_request(struct regulatory_request *request)
285{
Luis R. Rodriguez255e25b2014-02-25 17:09:40 -0800286 struct regulatory_request *lr;
287
288 lr = get_last_request();
289 if (lr == request)
290 return;
291
Arik Nemtsovc8883932014-04-21 20:39:34 -0700292 reg_free_last_request();
Luis R. Rodriguez05f1a3e2013-11-05 09:18:09 -0800293 rcu_assign_pointer(last_request, request);
294}
295
Johannes Berg379b82f2012-12-06 15:44:07 +0100296static void reset_regdomains(bool full_reset,
297 const struct ieee80211_regdomain *new_regdom)
Johannes Berg734366d2008-09-15 10:56:48 +0200298{
Johannes Berg458f4f92012-12-06 15:47:38 +0100299 const struct ieee80211_regdomain *r;
300
Johannes Berg38fd2142013-05-10 19:17:17 +0200301 ASSERT_RTNL();
Johannes Berge8da2bb2012-12-03 23:00:08 +0100302
Johannes Berg458f4f92012-12-06 15:47:38 +0100303 r = get_cfg80211_regdom();
304
Johannes Berg942b25c2008-09-15 11:26:47 +0200305 /* avoid freeing static information or freeing something twice */
Johannes Berg458f4f92012-12-06 15:47:38 +0100306 if (r == cfg80211_world_regdom)
307 r = NULL;
Johannes Berg942b25c2008-09-15 11:26:47 +0200308 if (cfg80211_world_regdom == &world_regdom)
309 cfg80211_world_regdom = NULL;
Johannes Berg458f4f92012-12-06 15:47:38 +0100310 if (r == &world_regdom)
311 r = NULL;
Johannes Berg942b25c2008-09-15 11:26:47 +0200312
Johannes Berg458f4f92012-12-06 15:47:38 +0100313 rcu_free_regdom(r);
314 rcu_free_regdom(cfg80211_world_regdom);
Johannes Berg734366d2008-09-15 10:56:48 +0200315
Johannes Berga3d2eaf2008-09-15 11:10:52 +0200316 cfg80211_world_regdom = &world_regdom;
Johannes Berg458f4f92012-12-06 15:47:38 +0100317 rcu_assign_pointer(cfg80211_regdomain, new_regdom);
Luis R. Rodrigueza0429942011-11-28 16:47:15 -0500318
319 if (!full_reset)
320 return;
321
Luis R. Rodriguez05f1a3e2013-11-05 09:18:09 -0800322 reg_update_last_request(&core_request_world);
Johannes Berg734366d2008-09-15 10:56:48 +0200323}
324
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -0500325/*
326 * Dynamic world regulatory domain requested by the wireless
327 * core upon initialization
328 */
Johannes Berga3d2eaf2008-09-15 11:10:52 +0200329static void update_world_regdomain(const struct ieee80211_regdomain *rd)
Johannes Berg734366d2008-09-15 10:56:48 +0200330{
Johannes Bergc492db32012-12-06 16:29:25 +0100331 struct regulatory_request *lr;
Johannes Berg734366d2008-09-15 10:56:48 +0200332
Johannes Bergc492db32012-12-06 16:29:25 +0100333 lr = get_last_request();
334
335 WARN_ON(!lr);
Johannes Berge8da2bb2012-12-03 23:00:08 +0100336
Johannes Berg379b82f2012-12-06 15:44:07 +0100337 reset_regdomains(false, rd);
Johannes Berg734366d2008-09-15 10:56:48 +0200338
339 cfg80211_world_regdom = rd;
Johannes Berg734366d2008-09-15 10:56:48 +0200340}
Johannes Berg734366d2008-09-15 10:56:48 +0200341
Johannes Berga3d2eaf2008-09-15 11:10:52 +0200342bool is_world_regdom(const char *alpha2)
Johannes Berg8318d782008-01-24 19:38:38 +0100343{
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700344 if (!alpha2)
345 return false;
Johannes Berg1a919312012-12-03 17:21:11 +0100346 return alpha2[0] == '0' && alpha2[1] == '0';
Johannes Berg8318d782008-01-24 19:38:38 +0100347}
348
Johannes Berga3d2eaf2008-09-15 11:10:52 +0200349static bool is_alpha2_set(const char *alpha2)
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700350{
351 if (!alpha2)
352 return false;
Johannes Berg1a919312012-12-03 17:21:11 +0100353 return alpha2[0] && alpha2[1];
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700354}
Johannes Berg8318d782008-01-24 19:38:38 +0100355
Johannes Berga3d2eaf2008-09-15 11:10:52 +0200356static bool is_unknown_alpha2(const char *alpha2)
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700357{
358 if (!alpha2)
359 return false;
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -0500360 /*
361 * Special case where regulatory domain was built by driver
362 * but a specific alpha2 cannot be determined
363 */
Johannes Berg1a919312012-12-03 17:21:11 +0100364 return alpha2[0] == '9' && alpha2[1] == '9';
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700365}
366
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -0800367static bool is_intersected_alpha2(const char *alpha2)
368{
369 if (!alpha2)
370 return false;
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -0500371 /*
372 * Special case where regulatory domain is the
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -0800373 * result of an intersection between two regulatory domain
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -0500374 * structures
375 */
Johannes Berg1a919312012-12-03 17:21:11 +0100376 return alpha2[0] == '9' && alpha2[1] == '8';
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -0800377}
378
Johannes Berga3d2eaf2008-09-15 11:10:52 +0200379static bool is_an_alpha2(const char *alpha2)
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700380{
381 if (!alpha2)
382 return false;
Johannes Berg1a919312012-12-03 17:21:11 +0100383 return isalpha(alpha2[0]) && isalpha(alpha2[1]);
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700384}
385
Johannes Berga3d2eaf2008-09-15 11:10:52 +0200386static bool alpha2_equal(const char *alpha2_x, const char *alpha2_y)
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700387{
388 if (!alpha2_x || !alpha2_y)
389 return false;
Johannes Berg1a919312012-12-03 17:21:11 +0100390 return alpha2_x[0] == alpha2_y[0] && alpha2_x[1] == alpha2_y[1];
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700391}
392
Luis R. Rodriguez69b15722009-02-21 00:04:33 -0500393static bool regdom_changes(const char *alpha2)
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700394{
Johannes Berg458f4f92012-12-06 15:47:38 +0100395 const struct ieee80211_regdomain *r = get_cfg80211_regdom();
Luis R. Rodriguez761cf7e2009-02-21 00:04:25 -0500396
Johannes Berg458f4f92012-12-06 15:47:38 +0100397 if (!r)
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700398 return true;
Johannes Berg458f4f92012-12-06 15:47:38 +0100399 return !alpha2_equal(r->alpha2, alpha2);
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700400}
401
Luis R. Rodriguez09d989d2010-01-29 19:58:57 -0500402/*
403 * The NL80211_REGDOM_SET_BY_USER regdom alpha2 is cached, this lets
404 * you know if a valid regulatory hint with NL80211_REGDOM_SET_BY_USER
405 * has ever been issued.
406 */
407static bool is_user_regdom_saved(void)
408{
409 if (user_alpha2[0] == '9' && user_alpha2[1] == '7')
410 return false;
411
412 /* This would indicate a mistake on the design */
Johannes Berg1a919312012-12-03 17:21:11 +0100413 if (WARN(!is_world_regdom(user_alpha2) && !is_an_alpha2(user_alpha2),
Luis R. Rodriguez09d989d2010-01-29 19:58:57 -0500414 "Unexpected user alpha2: %c%c\n",
Johannes Berg1a919312012-12-03 17:21:11 +0100415 user_alpha2[0], user_alpha2[1]))
Luis R. Rodriguez09d989d2010-01-29 19:58:57 -0500416 return false;
417
418 return true;
419}
420
Mihir Shetebe4ca6b2014-03-27 13:04:15 +0530421static bool is_cfg80211_regdom_intersected(void)
422{
423 return is_intersected_alpha2(get_cfg80211_regdom()->alpha2);
424}
425
Johannes Berge9763c32012-12-03 16:59:46 +0100426static const struct ieee80211_regdomain *
427reg_copy_regd(const struct ieee80211_regdomain *src_regd)
John W. Linville3b377ea2009-12-18 17:59:01 -0500428{
429 struct ieee80211_regdomain *regd;
Johannes Berge9763c32012-12-03 16:59:46 +0100430 int size_of_regd;
John W. Linville3b377ea2009-12-18 17:59:01 -0500431 unsigned int i;
432
Johannes Berg82f20852012-12-04 12:49:16 +0100433 size_of_regd =
434 sizeof(struct ieee80211_regdomain) +
435 src_regd->n_reg_rules * sizeof(struct ieee80211_reg_rule);
John W. Linville3b377ea2009-12-18 17:59:01 -0500436
437 regd = kzalloc(size_of_regd, GFP_KERNEL);
438 if (!regd)
Johannes Berge9763c32012-12-03 16:59:46 +0100439 return ERR_PTR(-ENOMEM);
John W. Linville3b377ea2009-12-18 17:59:01 -0500440
441 memcpy(regd, src_regd, sizeof(struct ieee80211_regdomain));
442
443 for (i = 0; i < src_regd->n_reg_rules; i++)
444 memcpy(&regd->reg_rules[i], &src_regd->reg_rules[i],
Johannes Berge9763c32012-12-03 16:59:46 +0100445 sizeof(struct ieee80211_reg_rule));
John W. Linville3b377ea2009-12-18 17:59:01 -0500446
Johannes Berge9763c32012-12-03 16:59:46 +0100447 return regd;
John W. Linville3b377ea2009-12-18 17:59:01 -0500448}
449
450#ifdef CONFIG_CFG80211_INTERNAL_REGDB
Johannes Bergc7d319e2015-10-15 09:03:05 +0200451struct reg_regdb_apply_request {
John W. Linville3b377ea2009-12-18 17:59:01 -0500452 struct list_head list;
Johannes Bergc7d319e2015-10-15 09:03:05 +0200453 const struct ieee80211_regdomain *regdom;
John W. Linville3b377ea2009-12-18 17:59:01 -0500454};
455
Johannes Bergc7d319e2015-10-15 09:03:05 +0200456static LIST_HEAD(reg_regdb_apply_list);
457static DEFINE_MUTEX(reg_regdb_apply_mutex);
John W. Linville3b377ea2009-12-18 17:59:01 -0500458
Johannes Bergc7d319e2015-10-15 09:03:05 +0200459static void reg_regdb_apply(struct work_struct *work)
John W. Linville3b377ea2009-12-18 17:59:01 -0500460{
Johannes Bergc7d319e2015-10-15 09:03:05 +0200461 struct reg_regdb_apply_request *request;
Luis R. Rodrigueza85d0d72012-09-14 15:36:57 -0700462
Johannes Berg5fe231e2013-05-08 21:45:15 +0200463 rtnl_lock();
John W. Linville3b377ea2009-12-18 17:59:01 -0500464
Johannes Bergc7d319e2015-10-15 09:03:05 +0200465 mutex_lock(&reg_regdb_apply_mutex);
466 while (!list_empty(&reg_regdb_apply_list)) {
467 request = list_first_entry(&reg_regdb_apply_list,
468 struct reg_regdb_apply_request,
John W. Linville3b377ea2009-12-18 17:59:01 -0500469 list);
470 list_del(&request->list);
471
Johannes Bergc7d319e2015-10-15 09:03:05 +0200472 set_regdom(request->regdom, REGD_SOURCE_INTERNAL_DB);
John W. Linville3b377ea2009-12-18 17:59:01 -0500473 kfree(request);
474 }
Johannes Bergc7d319e2015-10-15 09:03:05 +0200475 mutex_unlock(&reg_regdb_apply_mutex);
Luis R. Rodrigueza85d0d72012-09-14 15:36:57 -0700476
Johannes Berg5fe231e2013-05-08 21:45:15 +0200477 rtnl_unlock();
John W. Linville3b377ea2009-12-18 17:59:01 -0500478}
479
Johannes Bergc7d319e2015-10-15 09:03:05 +0200480static DECLARE_WORK(reg_regdb_work, reg_regdb_apply);
John W. Linville3b377ea2009-12-18 17:59:01 -0500481
Johannes Bergfd453d32015-10-15 10:22:12 +0200482static int reg_query_builtin(const char *alpha2)
John W. Linville3b377ea2009-12-18 17:59:01 -0500483{
Johannes Bergc7d319e2015-10-15 09:03:05 +0200484 const struct ieee80211_regdomain *regdom = NULL;
485 struct reg_regdb_apply_request *request;
486 unsigned int i;
John W. Linville3b377ea2009-12-18 17:59:01 -0500487
Johannes Bergc7d319e2015-10-15 09:03:05 +0200488 for (i = 0; i < reg_regdb_size; i++) {
489 if (alpha2_equal(alpha2, reg_regdb[i]->alpha2)) {
490 regdom = reg_regdb[i];
491 break;
492 }
493 }
494
495 if (!regdom)
496 return -ENODATA;
497
498 request = kzalloc(sizeof(struct reg_regdb_apply_request), GFP_KERNEL);
John W. Linville3b377ea2009-12-18 17:59:01 -0500499 if (!request)
Johannes Bergc7d319e2015-10-15 09:03:05 +0200500 return -ENOMEM;
John W. Linville3b377ea2009-12-18 17:59:01 -0500501
Johannes Bergc7d319e2015-10-15 09:03:05 +0200502 request->regdom = reg_copy_regd(regdom);
503 if (IS_ERR_OR_NULL(request->regdom)) {
504 kfree(request);
505 return -ENOMEM;
506 }
John W. Linville3b377ea2009-12-18 17:59:01 -0500507
Johannes Bergc7d319e2015-10-15 09:03:05 +0200508 mutex_lock(&reg_regdb_apply_mutex);
509 list_add_tail(&request->list, &reg_regdb_apply_list);
510 mutex_unlock(&reg_regdb_apply_mutex);
John W. Linville3b377ea2009-12-18 17:59:01 -0500511
512 schedule_work(&reg_regdb_work);
Johannes Bergc7d319e2015-10-15 09:03:05 +0200513
514 return 0;
John W. Linville3b377ea2009-12-18 17:59:01 -0500515}
Luis R. Rodriguez80007ef2012-03-23 07:23:31 -0700516
517/* Feel free to add any other sanity checks here */
518static void reg_regdb_size_check(void)
519{
520 /* We should ideally BUILD_BUG_ON() but then random builds would fail */
521 WARN_ONCE(!reg_regdb_size, "db.txt is empty, you should update it...");
522}
John W. Linville3b377ea2009-12-18 17:59:01 -0500523#else
Luis R. Rodriguez80007ef2012-03-23 07:23:31 -0700524static inline void reg_regdb_size_check(void) {}
Johannes Bergfd453d32015-10-15 10:22:12 +0200525static inline int reg_query_builtin(const char *alpha2)
Johannes Bergc7d319e2015-10-15 09:03:05 +0200526{
527 return -ENODATA;
528}
John W. Linville3b377ea2009-12-18 17:59:01 -0500529#endif /* CONFIG_CFG80211_INTERNAL_REGDB */
530
Johannes Bergb6863032015-10-15 09:25:18 +0200531#ifdef CONFIG_CFG80211_CRDA_SUPPORT
532/* Max number of consecutive attempts to communicate with CRDA */
533#define REG_MAX_CRDA_TIMEOUTS 10
534
535static u32 reg_crda_timeouts;
536
537static void crda_timeout_work(struct work_struct *work);
538static DECLARE_DELAYED_WORK(crda_timeout, crda_timeout_work);
539
540static void crda_timeout_work(struct work_struct *work)
541{
Johannes Bergc799ba62015-12-11 15:31:10 +0100542 pr_debug("Timeout while waiting for CRDA to reply, restoring regulatory settings\n");
Johannes Bergb6863032015-10-15 09:25:18 +0200543 rtnl_lock();
544 reg_crda_timeouts++;
545 restore_regulatory_settings(true);
546 rtnl_unlock();
547}
548
549static void cancel_crda_timeout(void)
550{
551 cancel_delayed_work(&crda_timeout);
552}
553
554static void cancel_crda_timeout_sync(void)
555{
556 cancel_delayed_work_sync(&crda_timeout);
557}
558
559static void reset_crda_timeouts(void)
560{
561 reg_crda_timeouts = 0;
562}
563
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -0500564/*
565 * This lets us keep regulatory code which is updated on a regulatory
Johannes Berg1226d252014-02-25 15:43:36 +0100566 * basis in userspace.
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -0500567 */
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700568static int call_crda(const char *alpha2)
569{
Johannes Berg1226d252014-02-25 15:43:36 +0100570 char country[12];
571 char *env[] = { country, NULL };
Johannes Bergc7d319e2015-10-15 09:03:05 +0200572 int ret;
Johannes Berg1226d252014-02-25 15:43:36 +0100573
574 snprintf(country, sizeof(country), "COUNTRY=%c%c",
575 alpha2[0], alpha2[1]);
576
Ilan peerc37722b2015-03-30 15:15:49 +0300577 if (reg_crda_timeouts > REG_MAX_CRDA_TIMEOUTS) {
Thomas Petazzoni042ab5f2015-07-09 15:35:15 +0200578 pr_debug("Exceeded CRDA call max attempts. Not calling CRDA\n");
Ilan peerc37722b2015-03-30 15:15:49 +0300579 return -EINVAL;
580 }
581
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700582 if (!is_world_regdom((char *) alpha2))
Thomas Petazzoni042ab5f2015-07-09 15:35:15 +0200583 pr_debug("Calling CRDA for country: %c%c\n",
Johannes Bergc799ba62015-12-11 15:31:10 +0100584 alpha2[0], alpha2[1]);
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700585 else
Thomas Petazzoni042ab5f2015-07-09 15:35:15 +0200586 pr_debug("Calling CRDA to update world regulatory domain\n");
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700587
Johannes Bergc7d319e2015-10-15 09:03:05 +0200588 ret = kobject_uevent_env(&reg_pdev->dev.kobj, KOBJ_CHANGE, env);
589 if (ret)
590 return ret;
591
592 queue_delayed_work(system_power_efficient_wq,
Johannes Bergb6863032015-10-15 09:25:18 +0200593 &crda_timeout, msecs_to_jiffies(3142));
Johannes Bergc7d319e2015-10-15 09:03:05 +0200594 return 0;
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700595}
Johannes Bergb6863032015-10-15 09:25:18 +0200596#else
597static inline void cancel_crda_timeout(void) {}
598static inline void cancel_crda_timeout_sync(void) {}
599static inline void reset_crda_timeouts(void) {}
600static inline int call_crda(const char *alpha2)
601{
602 return -ENODATA;
603}
604#endif /* CONFIG_CFG80211_CRDA_SUPPORT */
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700605
Johannes Bergcecbb062015-10-15 08:47:34 +0200606static bool reg_query_database(struct regulatory_request *request)
Luis R. Rodriguezfe6631f2013-11-05 09:18:10 -0800607{
Johannes Bergc7d319e2015-10-15 09:03:05 +0200608 /* query internal regulatory database (if it exists) */
Johannes Bergfd453d32015-10-15 10:22:12 +0200609 if (reg_query_builtin(request->alpha2) == 0)
Johannes Bergc7d319e2015-10-15 09:03:05 +0200610 return true;
Ilan peereeca9fc2015-03-04 00:32:07 -0500611
Johannes Bergc7d319e2015-10-15 09:03:05 +0200612 if (call_crda(request->alpha2) == 0)
613 return true;
614
615 return false;
Luis R. Rodriguezfe6631f2013-11-05 09:18:10 -0800616}
617
Luis R. Rodrigueze4387682013-11-05 09:18:01 -0800618bool reg_is_valid_request(const char *alpha2)
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700619{
Johannes Bergc492db32012-12-06 16:29:25 +0100620 struct regulatory_request *lr = get_last_request();
Luis R. Rodriguez61405e92009-05-13 17:04:41 -0400621
Johannes Bergc492db32012-12-06 16:29:25 +0100622 if (!lr || lr->processed)
Johannes Bergf6037d02008-10-21 11:01:33 +0200623 return false;
624
Johannes Bergc492db32012-12-06 16:29:25 +0100625 return alpha2_equal(lr->alpha2, alpha2);
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700626}
627
Janusz Dziedzice3961af2014-01-25 11:24:11 +0100628static const struct ieee80211_regdomain *reg_get_regdomain(struct wiphy *wiphy)
629{
630 struct regulatory_request *lr = get_last_request();
631
632 /*
633 * Follow the driver's regulatory domain, if present, unless a country
634 * IE has been processed or a user wants to help complaince further
635 */
636 if (lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE &&
637 lr->initiator != NL80211_REGDOM_SET_BY_USER &&
638 wiphy->regd)
639 return get_wiphy_regdom(wiphy);
640
641 return get_cfg80211_regdom();
642}
643
Arik Nemtsova6d4a532014-10-23 09:37:33 +0300644static unsigned int
645reg_get_max_bandwidth_from_range(const struct ieee80211_regdomain *rd,
646 const struct ieee80211_reg_rule *rule)
Janusz Dziedzic97524822014-01-30 09:52:20 +0100647{
648 const struct ieee80211_freq_range *freq_range = &rule->freq_range;
649 const struct ieee80211_freq_range *freq_range_tmp;
650 const struct ieee80211_reg_rule *tmp;
651 u32 start_freq, end_freq, idx, no;
652
653 for (idx = 0; idx < rd->n_reg_rules; idx++)
654 if (rule == &rd->reg_rules[idx])
655 break;
656
657 if (idx == rd->n_reg_rules)
658 return 0;
659
660 /* get start_freq */
661 no = idx;
662
663 while (no) {
664 tmp = &rd->reg_rules[--no];
665 freq_range_tmp = &tmp->freq_range;
666
667 if (freq_range_tmp->end_freq_khz < freq_range->start_freq_khz)
668 break;
669
Janusz Dziedzic97524822014-01-30 09:52:20 +0100670 freq_range = freq_range_tmp;
671 }
672
673 start_freq = freq_range->start_freq_khz;
674
675 /* get end_freq */
676 freq_range = &rule->freq_range;
677 no = idx;
678
679 while (no < rd->n_reg_rules - 1) {
680 tmp = &rd->reg_rules[++no];
681 freq_range_tmp = &tmp->freq_range;
682
683 if (freq_range_tmp->start_freq_khz > freq_range->end_freq_khz)
684 break;
685
Janusz Dziedzic97524822014-01-30 09:52:20 +0100686 freq_range = freq_range_tmp;
687 }
688
689 end_freq = freq_range->end_freq_khz;
690
691 return end_freq - start_freq;
692}
693
Arik Nemtsova6d4a532014-10-23 09:37:33 +0300694unsigned int reg_get_max_bandwidth(const struct ieee80211_regdomain *rd,
695 const struct ieee80211_reg_rule *rule)
696{
697 unsigned int bw = reg_get_max_bandwidth_from_range(rd, rule);
698
699 if (rule->flags & NL80211_RRF_NO_160MHZ)
700 bw = min_t(unsigned int, bw, MHZ_TO_KHZ(80));
701 if (rule->flags & NL80211_RRF_NO_80MHZ)
702 bw = min_t(unsigned int, bw, MHZ_TO_KHZ(40));
703
704 /*
705 * HT40+/HT40- limits are handled per-channel. Only limit BW if both
706 * are not allowed.
707 */
708 if (rule->flags & NL80211_RRF_NO_HT40MINUS &&
709 rule->flags & NL80211_RRF_NO_HT40PLUS)
710 bw = min_t(unsigned int, bw, MHZ_TO_KHZ(20));
711
712 return bw;
713}
714
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700715/* Sanity check on a regulatory rule */
Johannes Berga3d2eaf2008-09-15 11:10:52 +0200716static bool is_valid_reg_rule(const struct ieee80211_reg_rule *rule)
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700717{
Johannes Berga3d2eaf2008-09-15 11:10:52 +0200718 const struct ieee80211_freq_range *freq_range = &rule->freq_range;
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700719 u32 freq_diff;
720
Luis R. Rodriguez91e99002008-11-12 14:21:55 -0800721 if (freq_range->start_freq_khz <= 0 || freq_range->end_freq_khz <= 0)
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700722 return false;
723
724 if (freq_range->start_freq_khz > freq_range->end_freq_khz)
725 return false;
726
727 freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz;
728
Roel Kluinbd05f282009-03-03 22:55:21 +0100729 if (freq_range->end_freq_khz <= freq_range->start_freq_khz ||
Johannes Berg1a919312012-12-03 17:21:11 +0100730 freq_range->max_bandwidth_khz > freq_diff)
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700731 return false;
732
733 return true;
734}
735
Johannes Berga3d2eaf2008-09-15 11:10:52 +0200736static bool is_valid_rd(const struct ieee80211_regdomain *rd)
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700737{
Johannes Berga3d2eaf2008-09-15 11:10:52 +0200738 const struct ieee80211_reg_rule *reg_rule = NULL;
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700739 unsigned int i;
740
741 if (!rd->n_reg_rules)
742 return false;
743
Luis R. Rodriguez88dc1c32008-11-12 14:22:01 -0800744 if (WARN_ON(rd->n_reg_rules > NL80211_MAX_SUPP_REG_RULES))
745 return false;
746
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700747 for (i = 0; i < rd->n_reg_rules; i++) {
748 reg_rule = &rd->reg_rules[i];
749 if (!is_valid_reg_rule(reg_rule))
750 return false;
751 }
752
753 return true;
754}
755
Luis R. Rodriguez038659e2009-05-02 00:37:17 -0400756static bool reg_does_bw_fit(const struct ieee80211_freq_range *freq_range,
Johannes Bergfe7ef5e2012-12-04 15:07:34 +0100757 u32 center_freq_khz, u32 bw_khz)
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700758{
Luis R. Rodriguez038659e2009-05-02 00:37:17 -0400759 u32 start_freq_khz, end_freq_khz;
760
761 start_freq_khz = center_freq_khz - (bw_khz/2);
762 end_freq_khz = center_freq_khz + (bw_khz/2);
763
764 if (start_freq_khz >= freq_range->start_freq_khz &&
765 end_freq_khz <= freq_range->end_freq_khz)
766 return true;
767
768 return false;
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700769}
770
Luis R. Rodriguez0c7dc452009-01-07 17:43:36 -0800771/**
772 * freq_in_rule_band - tells us if a frequency is in a frequency band
773 * @freq_range: frequency rule we want to query
774 * @freq_khz: frequency we are inquiring about
775 *
776 * This lets us know if a specific frequency rule is or is not relevant to
777 * a specific frequency's band. Bands are device specific and artificial
Vladimir Kondratiev64629b92012-09-23 09:49:54 +0200778 * definitions (the "2.4 GHz band", the "5 GHz band" and the "60GHz band"),
779 * however it is safe for now to assume that a frequency rule should not be
780 * part of a frequency's band if the start freq or end freq are off by more
781 * than 2 GHz for the 2.4 and 5 GHz bands, and by more than 10 GHz for the
782 * 60 GHz band.
Luis R. Rodriguez0c7dc452009-01-07 17:43:36 -0800783 * This resolution can be lowered and should be considered as we add
784 * regulatory rule support for other "bands".
785 **/
786static bool freq_in_rule_band(const struct ieee80211_freq_range *freq_range,
Johannes Berg1a919312012-12-03 17:21:11 +0100787 u32 freq_khz)
Luis R. Rodriguez0c7dc452009-01-07 17:43:36 -0800788{
789#define ONE_GHZ_IN_KHZ 1000000
Vladimir Kondratiev64629b92012-09-23 09:49:54 +0200790 /*
791 * From 802.11ad: directional multi-gigabit (DMG):
792 * Pertaining to operation in a frequency band containing a channel
793 * with the Channel starting frequency above 45 GHz.
794 */
795 u32 limit = freq_khz > 45 * ONE_GHZ_IN_KHZ ?
796 10 * ONE_GHZ_IN_KHZ : 2 * ONE_GHZ_IN_KHZ;
797 if (abs(freq_khz - freq_range->start_freq_khz) <= limit)
Luis R. Rodriguez0c7dc452009-01-07 17:43:36 -0800798 return true;
Vladimir Kondratiev64629b92012-09-23 09:49:54 +0200799 if (abs(freq_khz - freq_range->end_freq_khz) <= limit)
Luis R. Rodriguez0c7dc452009-01-07 17:43:36 -0800800 return true;
801 return false;
802#undef ONE_GHZ_IN_KHZ
803}
804
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -0500805/*
Luis R. Rodriguezadbfb052013-11-13 18:54:03 +0100806 * Later on we can perhaps use the more restrictive DFS
807 * region but we don't have information for that yet so
808 * for now simply disallow conflicts.
809 */
810static enum nl80211_dfs_regions
811reg_intersect_dfs_region(const enum nl80211_dfs_regions dfs_region1,
812 const enum nl80211_dfs_regions dfs_region2)
813{
814 if (dfs_region1 != dfs_region2)
815 return NL80211_DFS_UNSET;
816 return dfs_region1;
817}
818
819/*
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -0500820 * Helper for regdom_intersect(), this does the real
821 * mathematical intersection fun
822 */
Janusz Dziedzic97524822014-01-30 09:52:20 +0100823static int reg_rules_intersect(const struct ieee80211_regdomain *rd1,
824 const struct ieee80211_regdomain *rd2,
825 const struct ieee80211_reg_rule *rule1,
Johannes Berg1a919312012-12-03 17:21:11 +0100826 const struct ieee80211_reg_rule *rule2,
827 struct ieee80211_reg_rule *intersected_rule)
Luis R. Rodriguez9c964772008-10-30 13:33:53 -0700828{
829 const struct ieee80211_freq_range *freq_range1, *freq_range2;
830 struct ieee80211_freq_range *freq_range;
831 const struct ieee80211_power_rule *power_rule1, *power_rule2;
832 struct ieee80211_power_rule *power_rule;
Janusz Dziedzic97524822014-01-30 09:52:20 +0100833 u32 freq_diff, max_bandwidth1, max_bandwidth2;
Luis R. Rodriguez9c964772008-10-30 13:33:53 -0700834
835 freq_range1 = &rule1->freq_range;
836 freq_range2 = &rule2->freq_range;
837 freq_range = &intersected_rule->freq_range;
838
839 power_rule1 = &rule1->power_rule;
840 power_rule2 = &rule2->power_rule;
841 power_rule = &intersected_rule->power_rule;
842
843 freq_range->start_freq_khz = max(freq_range1->start_freq_khz,
Johannes Berg1a919312012-12-03 17:21:11 +0100844 freq_range2->start_freq_khz);
Luis R. Rodriguez9c964772008-10-30 13:33:53 -0700845 freq_range->end_freq_khz = min(freq_range1->end_freq_khz,
Johannes Berg1a919312012-12-03 17:21:11 +0100846 freq_range2->end_freq_khz);
Janusz Dziedzic97524822014-01-30 09:52:20 +0100847
848 max_bandwidth1 = freq_range1->max_bandwidth_khz;
849 max_bandwidth2 = freq_range2->max_bandwidth_khz;
850
Janusz Dziedzicb0dfd2e2014-02-20 13:52:16 +0100851 if (rule1->flags & NL80211_RRF_AUTO_BW)
852 max_bandwidth1 = reg_get_max_bandwidth(rd1, rule1);
853 if (rule2->flags & NL80211_RRF_AUTO_BW)
854 max_bandwidth2 = reg_get_max_bandwidth(rd2, rule2);
Janusz Dziedzic97524822014-01-30 09:52:20 +0100855
856 freq_range->max_bandwidth_khz = min(max_bandwidth1, max_bandwidth2);
Luis R. Rodriguez9c964772008-10-30 13:33:53 -0700857
Janusz Dziedzicb0dfd2e2014-02-20 13:52:16 +0100858 intersected_rule->flags = rule1->flags | rule2->flags;
859
860 /*
861 * In case NL80211_RRF_AUTO_BW requested for both rules
862 * set AUTO_BW in intersected rule also. Next we will
863 * calculate BW correctly in handle_channel function.
864 * In other case remove AUTO_BW flag while we calculate
865 * maximum bandwidth correctly and auto calculation is
866 * not required.
867 */
868 if ((rule1->flags & NL80211_RRF_AUTO_BW) &&
869 (rule2->flags & NL80211_RRF_AUTO_BW))
870 intersected_rule->flags |= NL80211_RRF_AUTO_BW;
871 else
872 intersected_rule->flags &= ~NL80211_RRF_AUTO_BW;
873
Luis R. Rodriguez9c964772008-10-30 13:33:53 -0700874 freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz;
875 if (freq_range->max_bandwidth_khz > freq_diff)
876 freq_range->max_bandwidth_khz = freq_diff;
877
878 power_rule->max_eirp = min(power_rule1->max_eirp,
879 power_rule2->max_eirp);
880 power_rule->max_antenna_gain = min(power_rule1->max_antenna_gain,
881 power_rule2->max_antenna_gain);
882
Janusz Dziedzic089027e2014-02-21 19:46:12 +0100883 intersected_rule->dfs_cac_ms = max(rule1->dfs_cac_ms,
884 rule2->dfs_cac_ms);
885
Luis R. Rodriguez9c964772008-10-30 13:33:53 -0700886 if (!is_valid_reg_rule(intersected_rule))
887 return -EINVAL;
888
889 return 0;
890}
891
Eliad Pellera62a1ae2014-09-03 15:25:03 +0300892/* check whether old rule contains new rule */
893static bool rule_contains(struct ieee80211_reg_rule *r1,
894 struct ieee80211_reg_rule *r2)
895{
896 /* for simplicity, currently consider only same flags */
897 if (r1->flags != r2->flags)
898 return false;
899
900 /* verify r1 is more restrictive */
901 if ((r1->power_rule.max_antenna_gain >
902 r2->power_rule.max_antenna_gain) ||
903 r1->power_rule.max_eirp > r2->power_rule.max_eirp)
904 return false;
905
906 /* make sure r2's range is contained within r1 */
907 if (r1->freq_range.start_freq_khz > r2->freq_range.start_freq_khz ||
908 r1->freq_range.end_freq_khz < r2->freq_range.end_freq_khz)
909 return false;
910
911 /* and finally verify that r1.max_bw >= r2.max_bw */
912 if (r1->freq_range.max_bandwidth_khz <
913 r2->freq_range.max_bandwidth_khz)
914 return false;
915
916 return true;
917}
918
919/* add or extend current rules. do nothing if rule is already contained */
920static void add_rule(struct ieee80211_reg_rule *rule,
921 struct ieee80211_reg_rule *reg_rules, u32 *n_rules)
922{
923 struct ieee80211_reg_rule *tmp_rule;
924 int i;
925
926 for (i = 0; i < *n_rules; i++) {
927 tmp_rule = &reg_rules[i];
928 /* rule is already contained - do nothing */
929 if (rule_contains(tmp_rule, rule))
930 return;
931
932 /* extend rule if possible */
933 if (rule_contains(rule, tmp_rule)) {
934 memcpy(tmp_rule, rule, sizeof(*rule));
935 return;
936 }
937 }
938
939 memcpy(&reg_rules[*n_rules], rule, sizeof(*rule));
940 (*n_rules)++;
941}
942
Luis R. Rodriguez9c964772008-10-30 13:33:53 -0700943/**
944 * regdom_intersect - do the intersection between two regulatory domains
945 * @rd1: first regulatory domain
946 * @rd2: second regulatory domain
947 *
948 * Use this function to get the intersection between two regulatory domains.
949 * Once completed we will mark the alpha2 for the rd as intersected, "98",
950 * as no one single alpha2 can represent this regulatory domain.
951 *
952 * Returns a pointer to the regulatory domain structure which will hold the
953 * resulting intersection of rules between rd1 and rd2. We will
954 * kzalloc() this structure for you.
955 */
Johannes Berg1a919312012-12-03 17:21:11 +0100956static struct ieee80211_regdomain *
957regdom_intersect(const struct ieee80211_regdomain *rd1,
958 const struct ieee80211_regdomain *rd2)
Luis R. Rodriguez9c964772008-10-30 13:33:53 -0700959{
960 int r, size_of_regd;
961 unsigned int x, y;
Eliad Pellera62a1ae2014-09-03 15:25:03 +0300962 unsigned int num_rules = 0;
Luis R. Rodriguez9c964772008-10-30 13:33:53 -0700963 const struct ieee80211_reg_rule *rule1, *rule2;
Eliad Pellera62a1ae2014-09-03 15:25:03 +0300964 struct ieee80211_reg_rule intersected_rule;
Luis R. Rodriguez9c964772008-10-30 13:33:53 -0700965 struct ieee80211_regdomain *rd;
Luis R. Rodriguez9c964772008-10-30 13:33:53 -0700966
967 if (!rd1 || !rd2)
968 return NULL;
969
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -0500970 /*
971 * First we get a count of the rules we'll need, then we actually
Luis R. Rodriguez9c964772008-10-30 13:33:53 -0700972 * build them. This is to so we can malloc() and free() a
973 * regdomain once. The reason we use reg_rules_intersect() here
974 * is it will return -EINVAL if the rule computed makes no sense.
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -0500975 * All rules that do check out OK are valid.
976 */
Luis R. Rodriguez9c964772008-10-30 13:33:53 -0700977
978 for (x = 0; x < rd1->n_reg_rules; x++) {
979 rule1 = &rd1->reg_rules[x];
980 for (y = 0; y < rd2->n_reg_rules; y++) {
981 rule2 = &rd2->reg_rules[y];
Janusz Dziedzic97524822014-01-30 09:52:20 +0100982 if (!reg_rules_intersect(rd1, rd2, rule1, rule2,
Eliad Pellera62a1ae2014-09-03 15:25:03 +0300983 &intersected_rule))
Luis R. Rodriguez9c964772008-10-30 13:33:53 -0700984 num_rules++;
Luis R. Rodriguez9c964772008-10-30 13:33:53 -0700985 }
986 }
987
988 if (!num_rules)
989 return NULL;
990
991 size_of_regd = sizeof(struct ieee80211_regdomain) +
Johannes Berg82f20852012-12-04 12:49:16 +0100992 num_rules * sizeof(struct ieee80211_reg_rule);
Luis R. Rodriguez9c964772008-10-30 13:33:53 -0700993
994 rd = kzalloc(size_of_regd, GFP_KERNEL);
995 if (!rd)
996 return NULL;
997
Eliad Pellera62a1ae2014-09-03 15:25:03 +0300998 for (x = 0; x < rd1->n_reg_rules; x++) {
Luis R. Rodriguez9c964772008-10-30 13:33:53 -0700999 rule1 = &rd1->reg_rules[x];
Eliad Pellera62a1ae2014-09-03 15:25:03 +03001000 for (y = 0; y < rd2->n_reg_rules; y++) {
Luis R. Rodriguez9c964772008-10-30 13:33:53 -07001001 rule2 = &rd2->reg_rules[y];
Janusz Dziedzic97524822014-01-30 09:52:20 +01001002 r = reg_rules_intersect(rd1, rd2, rule1, rule2,
Eliad Pellera62a1ae2014-09-03 15:25:03 +03001003 &intersected_rule);
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -05001004 /*
1005 * No need to memset here the intersected rule here as
1006 * we're not using the stack anymore
1007 */
Luis R. Rodriguez9c964772008-10-30 13:33:53 -07001008 if (r)
1009 continue;
Eliad Pellera62a1ae2014-09-03 15:25:03 +03001010
1011 add_rule(&intersected_rule, rd->reg_rules,
1012 &rd->n_reg_rules);
Luis R. Rodriguez9c964772008-10-30 13:33:53 -07001013 }
1014 }
1015
Luis R. Rodriguez9c964772008-10-30 13:33:53 -07001016 rd->alpha2[0] = '9';
1017 rd->alpha2[1] = '8';
Luis R. Rodriguezadbfb052013-11-13 18:54:03 +01001018 rd->dfs_region = reg_intersect_dfs_region(rd1->dfs_region,
1019 rd2->dfs_region);
Luis R. Rodriguez9c964772008-10-30 13:33:53 -07001020
1021 return rd;
1022}
1023
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -05001024/*
1025 * XXX: add support for the rest of enum nl80211_reg_rule_flags, we may
1026 * want to just have the channel structure use these
1027 */
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07001028static u32 map_regdom_flags(u32 rd_flags)
1029{
1030 u32 channel_flags = 0;
Luis R. Rodriguez8fe02e12013-10-21 19:22:25 +02001031 if (rd_flags & NL80211_RRF_NO_IR_ALL)
1032 channel_flags |= IEEE80211_CHAN_NO_IR;
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07001033 if (rd_flags & NL80211_RRF_DFS)
1034 channel_flags |= IEEE80211_CHAN_RADAR;
Seth Forshee03f6b082012-08-01 15:58:42 -05001035 if (rd_flags & NL80211_RRF_NO_OFDM)
1036 channel_flags |= IEEE80211_CHAN_NO_OFDM;
David Spinadel570dbde2014-02-23 09:12:59 +02001037 if (rd_flags & NL80211_RRF_NO_OUTDOOR)
1038 channel_flags |= IEEE80211_CHAN_INDOOR_ONLY;
Arik Nemtsov06f207f2015-05-06 16:28:31 +03001039 if (rd_flags & NL80211_RRF_IR_CONCURRENT)
1040 channel_flags |= IEEE80211_CHAN_IR_CONCURRENT;
Arik Nemtsova6d4a532014-10-23 09:37:33 +03001041 if (rd_flags & NL80211_RRF_NO_HT40MINUS)
1042 channel_flags |= IEEE80211_CHAN_NO_HT40MINUS;
1043 if (rd_flags & NL80211_RRF_NO_HT40PLUS)
1044 channel_flags |= IEEE80211_CHAN_NO_HT40PLUS;
1045 if (rd_flags & NL80211_RRF_NO_80MHZ)
1046 channel_flags |= IEEE80211_CHAN_NO_80MHZ;
1047 if (rd_flags & NL80211_RRF_NO_160MHZ)
1048 channel_flags |= IEEE80211_CHAN_NO_160MHZ;
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07001049 return channel_flags;
1050}
1051
Johannes Berg361c9c82012-12-06 15:57:14 +01001052static const struct ieee80211_reg_rule *
Michal Sojka49172872015-11-23 19:27:14 +01001053freq_reg_info_regd(u32 center_freq,
Matthias May4edd5692015-07-17 15:28:39 +02001054 const struct ieee80211_regdomain *regd, u32 bw)
Johannes Berg8318d782008-01-24 19:38:38 +01001055{
1056 int i;
Luis R. Rodriguez0c7dc452009-01-07 17:43:36 -08001057 bool band_rule_found = false;
Luis R. Rodriguez038659e2009-05-02 00:37:17 -04001058 bool bw_fits = false;
1059
Luis R. Rodriguez3e0c3ff2009-01-07 17:43:34 -08001060 if (!regd)
Johannes Berg361c9c82012-12-06 15:57:14 +01001061 return ERR_PTR(-EINVAL);
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07001062
Luis R. Rodriguez3e0c3ff2009-01-07 17:43:34 -08001063 for (i = 0; i < regd->n_reg_rules; i++) {
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07001064 const struct ieee80211_reg_rule *rr;
1065 const struct ieee80211_freq_range *fr = NULL;
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07001066
Luis R. Rodriguez3e0c3ff2009-01-07 17:43:34 -08001067 rr = &regd->reg_rules[i];
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07001068 fr = &rr->freq_range;
Luis R. Rodriguez0c7dc452009-01-07 17:43:36 -08001069
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -05001070 /*
1071 * We only need to know if one frequency rule was
Luis R. Rodriguez0c7dc452009-01-07 17:43:36 -08001072 * was in center_freq's band, that's enough, so lets
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -05001073 * not overwrite it once found
1074 */
Luis R. Rodriguez0c7dc452009-01-07 17:43:36 -08001075 if (!band_rule_found)
1076 band_rule_found = freq_in_rule_band(fr, center_freq);
1077
Matthias May4edd5692015-07-17 15:28:39 +02001078 bw_fits = reg_does_bw_fit(fr, center_freq, bw);
Luis R. Rodriguez0c7dc452009-01-07 17:43:36 -08001079
Johannes Berg361c9c82012-12-06 15:57:14 +01001080 if (band_rule_found && bw_fits)
1081 return rr;
Johannes Berg8318d782008-01-24 19:38:38 +01001082 }
1083
Luis R. Rodriguez0c7dc452009-01-07 17:43:36 -08001084 if (!band_rule_found)
Johannes Berg361c9c82012-12-06 15:57:14 +01001085 return ERR_PTR(-ERANGE);
Luis R. Rodriguez0c7dc452009-01-07 17:43:36 -08001086
Johannes Berg361c9c82012-12-06 15:57:14 +01001087 return ERR_PTR(-EINVAL);
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07001088}
1089
Johannes Berg8de1c632015-08-21 14:13:06 +02001090static const struct ieee80211_reg_rule *
1091__freq_reg_info(struct wiphy *wiphy, u32 center_freq, u32 min_bw)
Matthias May4edd5692015-07-17 15:28:39 +02001092{
1093 const struct ieee80211_regdomain *regd = reg_get_regdomain(wiphy);
1094 const struct ieee80211_reg_rule *reg_rule = NULL;
1095 u32 bw;
1096
1097 for (bw = MHZ_TO_KHZ(20); bw >= min_bw; bw = bw / 2) {
Michal Sojka49172872015-11-23 19:27:14 +01001098 reg_rule = freq_reg_info_regd(center_freq, regd, bw);
Matthias May4edd5692015-07-17 15:28:39 +02001099 if (!IS_ERR(reg_rule))
1100 return reg_rule;
1101 }
1102
1103 return reg_rule;
1104}
1105
Johannes Berg361c9c82012-12-06 15:57:14 +01001106const struct ieee80211_reg_rule *freq_reg_info(struct wiphy *wiphy,
1107 u32 center_freq)
Luis R. Rodriguez1fa25e42009-01-22 15:05:44 -08001108{
Matthias May4edd5692015-07-17 15:28:39 +02001109 return __freq_reg_info(wiphy, center_freq, MHZ_TO_KHZ(20));
Luis R. Rodriguez1fa25e42009-01-22 15:05:44 -08001110}
John W. Linville4f366c52010-07-15 14:57:33 -04001111EXPORT_SYMBOL(freq_reg_info);
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07001112
Luis R. Rodriguez034c6d62013-10-14 17:42:06 -07001113const char *reg_initiator_name(enum nl80211_reg_initiator initiator)
Luis R. Rodriguez926a0a02010-10-21 19:17:03 +05301114{
1115 switch (initiator) {
1116 case NL80211_REGDOM_SET_BY_CORE:
Luis R. Rodriguez034c6d62013-10-14 17:42:06 -07001117 return "core";
Luis R. Rodriguez926a0a02010-10-21 19:17:03 +05301118 case NL80211_REGDOM_SET_BY_USER:
Luis R. Rodriguez034c6d62013-10-14 17:42:06 -07001119 return "user";
Luis R. Rodriguez926a0a02010-10-21 19:17:03 +05301120 case NL80211_REGDOM_SET_BY_DRIVER:
Luis R. Rodriguez034c6d62013-10-14 17:42:06 -07001121 return "driver";
Luis R. Rodriguez926a0a02010-10-21 19:17:03 +05301122 case NL80211_REGDOM_SET_BY_COUNTRY_IE:
Luis R. Rodriguez034c6d62013-10-14 17:42:06 -07001123 return "country IE";
Luis R. Rodriguez926a0a02010-10-21 19:17:03 +05301124 default:
1125 WARN_ON(1);
Luis R. Rodriguez034c6d62013-10-14 17:42:06 -07001126 return "bug";
Luis R. Rodriguez926a0a02010-10-21 19:17:03 +05301127 }
1128}
Luis R. Rodriguez034c6d62013-10-14 17:42:06 -07001129EXPORT_SYMBOL(reg_initiator_name);
Luis R. Rodrigueze702d3c2010-10-21 19:17:04 +05301130
Michal Sojka1aeb1352015-11-23 19:27:16 +01001131static uint32_t reg_rule_to_chan_bw_flags(const struct ieee80211_regdomain *regd,
1132 const struct ieee80211_reg_rule *reg_rule,
1133 const struct ieee80211_channel *chan)
1134{
1135 const struct ieee80211_freq_range *freq_range = NULL;
1136 u32 max_bandwidth_khz, bw_flags = 0;
1137
1138 freq_range = &reg_rule->freq_range;
1139
1140 max_bandwidth_khz = freq_range->max_bandwidth_khz;
1141 /* Check if auto calculation requested */
1142 if (reg_rule->flags & NL80211_RRF_AUTO_BW)
1143 max_bandwidth_khz = reg_get_max_bandwidth(regd, reg_rule);
1144
1145 /* If we get a reg_rule we can assume that at least 5Mhz fit */
1146 if (!reg_does_bw_fit(freq_range, MHZ_TO_KHZ(chan->center_freq),
1147 MHZ_TO_KHZ(10)))
1148 bw_flags |= IEEE80211_CHAN_NO_10MHZ;
1149 if (!reg_does_bw_fit(freq_range, MHZ_TO_KHZ(chan->center_freq),
1150 MHZ_TO_KHZ(20)))
1151 bw_flags |= IEEE80211_CHAN_NO_20MHZ;
1152
1153 if (max_bandwidth_khz < MHZ_TO_KHZ(10))
1154 bw_flags |= IEEE80211_CHAN_NO_10MHZ;
1155 if (max_bandwidth_khz < MHZ_TO_KHZ(20))
1156 bw_flags |= IEEE80211_CHAN_NO_20MHZ;
1157 if (max_bandwidth_khz < MHZ_TO_KHZ(40))
1158 bw_flags |= IEEE80211_CHAN_NO_HT40;
1159 if (max_bandwidth_khz < MHZ_TO_KHZ(80))
1160 bw_flags |= IEEE80211_CHAN_NO_80MHZ;
1161 if (max_bandwidth_khz < MHZ_TO_KHZ(160))
1162 bw_flags |= IEEE80211_CHAN_NO_160MHZ;
1163 return bw_flags;
1164}
1165
Johannes Berge33e2242014-06-23 11:06:16 +02001166/*
1167 * Note that right now we assume the desired channel bandwidth
1168 * is always 20 MHz for each individual channel (HT40 uses 20 MHz
1169 * per channel, the primary and the extension channel).
Luis R. Rodriguez038659e2009-05-02 00:37:17 -04001170 */
Luis R. Rodriguez7ca43d02010-10-20 10:18:53 -07001171static void handle_channel(struct wiphy *wiphy,
1172 enum nl80211_reg_initiator initiator,
Johannes Bergfdc9d7b2012-12-03 18:36:09 +01001173 struct ieee80211_channel *chan)
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07001174{
Luis R. Rodriguez038659e2009-05-02 00:37:17 -04001175 u32 flags, bw_flags = 0;
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07001176 const struct ieee80211_reg_rule *reg_rule = NULL;
1177 const struct ieee80211_power_rule *power_rule = NULL;
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05001178 struct wiphy *request_wiphy = NULL;
Johannes Bergc492db32012-12-06 16:29:25 +01001179 struct regulatory_request *lr = get_last_request();
Janusz Dziedzic97524822014-01-30 09:52:20 +01001180 const struct ieee80211_regdomain *regd;
Luis R. Rodrigueza92a3ce2009-01-07 17:43:33 -08001181
Johannes Bergc492db32012-12-06 16:29:25 +01001182 request_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx);
Luis R. Rodrigueza92a3ce2009-01-07 17:43:33 -08001183
1184 flags = chan->orig_flags;
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07001185
Johannes Berg361c9c82012-12-06 15:57:14 +01001186 reg_rule = freq_reg_info(wiphy, MHZ_TO_KHZ(chan->center_freq));
1187 if (IS_ERR(reg_rule)) {
Luis R. Rodriguezca4ffe82010-10-20 10:18:55 -07001188 /*
1189 * We will disable all channels that do not match our
Lucas De Marchi25985ed2011-03-30 22:57:33 -03001190 * received regulatory rule unless the hint is coming
Luis R. Rodriguezca4ffe82010-10-20 10:18:55 -07001191 * from a Country IE and the Country IE had no information
1192 * about a band. The IEEE 802.11 spec allows for an AP
1193 * to send only a subset of the regulatory rules allowed,
1194 * so an AP in the US that only supports 2.4 GHz may only send
1195 * a country IE with information for the 2.4 GHz band
1196 * while 5 GHz is still supported.
1197 */
1198 if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE &&
Johannes Berg361c9c82012-12-06 15:57:14 +01001199 PTR_ERR(reg_rule) == -ERANGE)
Luis R. Rodriguezca4ffe82010-10-20 10:18:55 -07001200 return;
1201
Luis R. Rodriguezcc493e4f2013-11-06 17:54:44 +01001202 if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER &&
1203 request_wiphy && request_wiphy == wiphy &&
Luis R. Rodrigueza2f73b62013-11-11 22:15:29 +01001204 request_wiphy->regulatory_flags & REGULATORY_STRICT_REG) {
Johannes Bergc799ba62015-12-11 15:31:10 +01001205 pr_debug("Disabling freq %d MHz for good\n",
1206 chan->center_freq);
Luis R. Rodriguezcc493e4f2013-11-06 17:54:44 +01001207 chan->orig_flags |= IEEE80211_CHAN_DISABLED;
1208 chan->flags = chan->orig_flags;
1209 } else {
Johannes Bergc799ba62015-12-11 15:31:10 +01001210 pr_debug("Disabling freq %d MHz\n",
1211 chan->center_freq);
Luis R. Rodriguezcc493e4f2013-11-06 17:54:44 +01001212 chan->flags |= IEEE80211_CHAN_DISABLED;
1213 }
Johannes Berg8318d782008-01-24 19:38:38 +01001214 return;
Luis R. Rodriguezca4ffe82010-10-20 10:18:55 -07001215 }
Johannes Berg8318d782008-01-24 19:38:38 +01001216
Janusz Dziedzicb0dfd2e2014-02-20 13:52:16 +01001217 regd = reg_get_regdomain(wiphy);
Luis R. Rodrigueze702d3c2010-10-21 19:17:04 +05301218
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07001219 power_rule = &reg_rule->power_rule;
Michal Sojka1aeb1352015-11-23 19:27:16 +01001220 bw_flags = reg_rule_to_chan_bw_flags(regd, reg_rule, chan);
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07001221
Johannes Bergc492db32012-12-06 16:29:25 +01001222 if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER &&
Luis R. Rodriguez806a9e32009-02-21 00:04:26 -05001223 request_wiphy && request_wiphy == wiphy &&
Luis R. Rodrigueza2f73b62013-11-11 22:15:29 +01001224 request_wiphy->regulatory_flags & REGULATORY_STRICT_REG) {
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -05001225 /*
Lucas De Marchi25985ed2011-03-30 22:57:33 -03001226 * This guarantees the driver's requested regulatory domain
Luis R. Rodriguezf9763762009-01-22 15:05:52 -08001227 * will always be used as a base for further regulatory
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -05001228 * settings
1229 */
Luis R. Rodriguezf9763762009-01-22 15:05:52 -08001230 chan->flags = chan->orig_flags =
Luis R. Rodriguez038659e2009-05-02 00:37:17 -04001231 map_regdom_flags(reg_rule->flags) | bw_flags;
Luis R. Rodriguezf9763762009-01-22 15:05:52 -08001232 chan->max_antenna_gain = chan->orig_mag =
1233 (int) MBI_TO_DBI(power_rule->max_antenna_gain);
Felix Fietkau279f0f52012-10-17 13:56:20 +02001234 chan->max_reg_power = chan->max_power = chan->orig_mpwr =
Luis R. Rodriguezf9763762009-01-22 15:05:52 -08001235 (int) MBM_TO_DBM(power_rule->max_eirp);
Janusz Dziedzic4f267c12014-04-09 13:47:12 +02001236
1237 if (chan->flags & IEEE80211_CHAN_RADAR) {
1238 chan->dfs_cac_ms = IEEE80211_DFS_MIN_CAC_TIME_MS;
1239 if (reg_rule->dfs_cac_ms)
1240 chan->dfs_cac_ms = reg_rule->dfs_cac_ms;
1241 }
1242
Luis R. Rodriguezf9763762009-01-22 15:05:52 -08001243 return;
1244 }
1245
Simon Wunderlich04f39042013-02-08 18:16:19 +01001246 chan->dfs_state = NL80211_DFS_USABLE;
1247 chan->dfs_state_entered = jiffies;
1248
Rajkumar Manoharanaa3d7ee2011-09-14 14:28:17 +05301249 chan->beacon_found = false;
Luis R. Rodriguez038659e2009-05-02 00:37:17 -04001250 chan->flags = flags | bw_flags | map_regdom_flags(reg_rule->flags);
Johannes Berg1a919312012-12-03 17:21:11 +01001251 chan->max_antenna_gain =
1252 min_t(int, chan->orig_mag,
1253 MBI_TO_DBI(power_rule->max_antenna_gain));
Hong Wueccc0682012-01-11 20:33:39 +02001254 chan->max_reg_power = (int) MBM_TO_DBM(power_rule->max_eirp);
Janusz Dziedzic089027e2014-02-21 19:46:12 +01001255
1256 if (chan->flags & IEEE80211_CHAN_RADAR) {
1257 if (reg_rule->dfs_cac_ms)
1258 chan->dfs_cac_ms = reg_rule->dfs_cac_ms;
1259 else
1260 chan->dfs_cac_ms = IEEE80211_DFS_MIN_CAC_TIME_MS;
1261 }
1262
Stanislaw Gruszka5e31fc02012-07-24 08:35:39 +02001263 if (chan->orig_mpwr) {
1264 /*
Luis R. Rodrigueza09a85a2013-11-11 22:15:30 +01001265 * Devices that use REGULATORY_COUNTRY_IE_FOLLOW_POWER
1266 * will always follow the passed country IE power settings.
Stanislaw Gruszka5e31fc02012-07-24 08:35:39 +02001267 */
1268 if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE &&
Luis R. Rodrigueza09a85a2013-11-11 22:15:30 +01001269 wiphy->regulatory_flags & REGULATORY_COUNTRY_IE_FOLLOW_POWER)
Stanislaw Gruszka5e31fc02012-07-24 08:35:39 +02001270 chan->max_power = chan->max_reg_power;
1271 else
1272 chan->max_power = min(chan->orig_mpwr,
1273 chan->max_reg_power);
1274 } else
1275 chan->max_power = chan->max_reg_power;
Johannes Berg8318d782008-01-24 19:38:38 +01001276}
1277
Luis R. Rodriguez7ca43d02010-10-20 10:18:53 -07001278static void handle_band(struct wiphy *wiphy,
Johannes Bergfdc9d7b2012-12-03 18:36:09 +01001279 enum nl80211_reg_initiator initiator,
1280 struct ieee80211_supported_band *sband)
Johannes Berg8318d782008-01-24 19:38:38 +01001281{
Luis R. Rodrigueza92a3ce2009-01-07 17:43:33 -08001282 unsigned int i;
Luis R. Rodrigueza92a3ce2009-01-07 17:43:33 -08001283
Johannes Bergfdc9d7b2012-12-03 18:36:09 +01001284 if (!sband)
1285 return;
Johannes Berg8318d782008-01-24 19:38:38 +01001286
1287 for (i = 0; i < sband->n_channels; i++)
Johannes Bergfdc9d7b2012-12-03 18:36:09 +01001288 handle_channel(wiphy, initiator, &sband->channels[i]);
Johannes Berg8318d782008-01-24 19:38:38 +01001289}
1290
Luis R. Rodriguez57b5ce02012-07-12 11:49:18 -07001291static bool reg_request_cell_base(struct regulatory_request *request)
1292{
1293 if (request->initiator != NL80211_REGDOM_SET_BY_USER)
1294 return false;
Johannes Berg1a919312012-12-03 17:21:11 +01001295 return request->user_reg_hint_type == NL80211_USER_REG_HINT_CELL_BASE;
Luis R. Rodriguez57b5ce02012-07-12 11:49:18 -07001296}
1297
1298bool reg_last_request_cell_base(void)
1299{
Johannes Berg38fd2142013-05-10 19:17:17 +02001300 return reg_request_cell_base(get_last_request());
Luis R. Rodriguez57b5ce02012-07-12 11:49:18 -07001301}
1302
Ilan Peer94fc6612014-02-23 09:13:00 +02001303#ifdef CONFIG_CFG80211_REG_CELLULAR_HINTS
Luis R. Rodriguez57b5ce02012-07-12 11:49:18 -07001304/* Core specific check */
Johannes Berg2f922122012-12-03 17:54:55 +01001305static enum reg_request_treatment
1306reg_ignore_cell_hint(struct regulatory_request *pending_request)
Luis R. Rodriguez57b5ce02012-07-12 11:49:18 -07001307{
Johannes Bergc492db32012-12-06 16:29:25 +01001308 struct regulatory_request *lr = get_last_request();
Luis R. Rodriguez57b5ce02012-07-12 11:49:18 -07001309
Luis R. Rodriguez57b5ce02012-07-12 11:49:18 -07001310 if (!reg_num_devs_support_basehint)
Johannes Berg2f922122012-12-03 17:54:55 +01001311 return REG_REQ_IGNORE;
Luis R. Rodriguez57b5ce02012-07-12 11:49:18 -07001312
Johannes Bergc492db32012-12-06 16:29:25 +01001313 if (reg_request_cell_base(lr) &&
Johannes Berg1a919312012-12-03 17:21:11 +01001314 !regdom_changes(pending_request->alpha2))
Johannes Berg2f922122012-12-03 17:54:55 +01001315 return REG_REQ_ALREADY_SET;
Johannes Berg1a919312012-12-03 17:21:11 +01001316
Johannes Berg2f922122012-12-03 17:54:55 +01001317 return REG_REQ_OK;
Luis R. Rodriguez57b5ce02012-07-12 11:49:18 -07001318}
1319
1320/* Device specific check */
1321static bool reg_dev_ignore_cell_hint(struct wiphy *wiphy)
1322{
Johannes Berg1a919312012-12-03 17:21:11 +01001323 return !(wiphy->features & NL80211_FEATURE_CELL_BASE_REG_HINTS);
Luis R. Rodriguez57b5ce02012-07-12 11:49:18 -07001324}
1325#else
Johannes Berga515de62015-10-15 14:28:56 +02001326static enum reg_request_treatment
1327reg_ignore_cell_hint(struct regulatory_request *pending_request)
Luis R. Rodriguez57b5ce02012-07-12 11:49:18 -07001328{
Johannes Berg2f922122012-12-03 17:54:55 +01001329 return REG_REQ_IGNORE;
Luis R. Rodriguez57b5ce02012-07-12 11:49:18 -07001330}
Johannes Berg1a919312012-12-03 17:21:11 +01001331
1332static bool reg_dev_ignore_cell_hint(struct wiphy *wiphy)
Luis R. Rodriguez57b5ce02012-07-12 11:49:18 -07001333{
1334 return true;
1335}
1336#endif
1337
Luis R. Rodriguezfa1fb9c2013-10-02 18:33:10 -07001338static bool wiphy_strict_alpha2_regd(struct wiphy *wiphy)
1339{
Luis R. Rodrigueza2f73b62013-11-11 22:15:29 +01001340 if (wiphy->regulatory_flags & REGULATORY_STRICT_REG &&
1341 !(wiphy->regulatory_flags & REGULATORY_CUSTOM_REG))
Luis R. Rodriguezfa1fb9c2013-10-02 18:33:10 -07001342 return true;
1343 return false;
1344}
Luis R. Rodriguez57b5ce02012-07-12 11:49:18 -07001345
Luis R. Rodriguez7db90f42009-03-09 22:07:41 -04001346static bool ignore_reg_update(struct wiphy *wiphy,
1347 enum nl80211_reg_initiator initiator)
Luis R. Rodriguez14b98152008-11-12 14:22:03 -08001348{
Johannes Bergc492db32012-12-06 16:29:25 +01001349 struct regulatory_request *lr = get_last_request();
1350
Jonathan Doronb0d7aa52014-12-15 19:26:00 +02001351 if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED)
1352 return true;
1353
Johannes Bergc492db32012-12-06 16:29:25 +01001354 if (!lr) {
Johannes Bergc799ba62015-12-11 15:31:10 +01001355 pr_debug("Ignoring regulatory request set by %s since last_request is not set\n",
1356 reg_initiator_name(initiator));
Luis R. Rodriguez14b98152008-11-12 14:22:03 -08001357 return true;
Luis R. Rodriguez926a0a02010-10-21 19:17:03 +05301358 }
1359
Luis R. Rodriguez7db90f42009-03-09 22:07:41 -04001360 if (initiator == NL80211_REGDOM_SET_BY_CORE &&
Luis R. Rodrigueza2f73b62013-11-11 22:15:29 +01001361 wiphy->regulatory_flags & REGULATORY_CUSTOM_REG) {
Johannes Bergc799ba62015-12-11 15:31:10 +01001362 pr_debug("Ignoring regulatory request set by %s since the driver uses its own custom regulatory domain\n",
1363 reg_initiator_name(initiator));
Luis R. Rodriguez14b98152008-11-12 14:22:03 -08001364 return true;
Luis R. Rodriguez926a0a02010-10-21 19:17:03 +05301365 }
1366
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -05001367 /*
1368 * wiphy->regd will be set once the device has its own
1369 * desired regulatory domain set
1370 */
Luis R. Rodriguezfa1fb9c2013-10-02 18:33:10 -07001371 if (wiphy_strict_alpha2_regd(wiphy) && !wiphy->regd &&
Luis R. Rodriguez749b5272010-10-20 10:18:54 -07001372 initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE &&
Johannes Bergc492db32012-12-06 16:29:25 +01001373 !is_world_regdom(lr->alpha2)) {
Johannes Bergc799ba62015-12-11 15:31:10 +01001374 pr_debug("Ignoring regulatory request set by %s since the driver requires its own regulatory domain to be set first\n",
1375 reg_initiator_name(initiator));
Luis R. Rodriguez14b98152008-11-12 14:22:03 -08001376 return true;
Luis R. Rodriguez926a0a02010-10-21 19:17:03 +05301377 }
1378
Johannes Bergc492db32012-12-06 16:29:25 +01001379 if (reg_request_cell_base(lr))
Luis R. Rodriguez57b5ce02012-07-12 11:49:18 -07001380 return reg_dev_ignore_cell_hint(wiphy);
1381
Luis R. Rodriguez14b98152008-11-12 14:22:03 -08001382 return false;
1383}
1384
Luis R. Rodriguez3195e482012-12-19 10:53:03 -08001385static bool reg_is_world_roaming(struct wiphy *wiphy)
1386{
1387 const struct ieee80211_regdomain *cr = get_cfg80211_regdom();
1388 const struct ieee80211_regdomain *wr = get_wiphy_regdom(wiphy);
1389 struct regulatory_request *lr = get_last_request();
1390
1391 if (is_world_regdom(cr->alpha2) || (wr && is_world_regdom(wr->alpha2)))
1392 return true;
1393
1394 if (lr && lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE &&
Luis R. Rodrigueza2f73b62013-11-11 22:15:29 +01001395 wiphy->regulatory_flags & REGULATORY_CUSTOM_REG)
Luis R. Rodriguez3195e482012-12-19 10:53:03 -08001396 return true;
1397
1398 return false;
1399}
1400
Johannes Berg1a919312012-12-03 17:21:11 +01001401static void handle_reg_beacon(struct wiphy *wiphy, unsigned int chan_idx,
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05001402 struct reg_beacon *reg_beacon)
1403{
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05001404 struct ieee80211_supported_band *sband;
1405 struct ieee80211_channel *chan;
Luis R. Rodriguez6bad8762009-04-02 14:08:09 -04001406 bool channel_changed = false;
1407 struct ieee80211_channel chan_before;
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05001408
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05001409 sband = wiphy->bands[reg_beacon->chan.band];
1410 chan = &sband->channels[chan_idx];
1411
1412 if (likely(chan->center_freq != reg_beacon->chan.center_freq))
1413 return;
1414
Luis R. Rodriguez6bad8762009-04-02 14:08:09 -04001415 if (chan->beacon_found)
1416 return;
1417
1418 chan->beacon_found = true;
1419
Luis R. Rodriguez0f500a52012-12-19 10:53:04 -08001420 if (!reg_is_world_roaming(wiphy))
1421 return;
1422
Luis R. Rodrigueza2f73b62013-11-11 22:15:29 +01001423 if (wiphy->regulatory_flags & REGULATORY_DISABLE_BEACON_HINTS)
Luis R. Rodriguez37184242009-07-30 17:43:48 -07001424 return;
1425
Luis R. Rodriguez6bad8762009-04-02 14:08:09 -04001426 chan_before.center_freq = chan->center_freq;
1427 chan_before.flags = chan->flags;
1428
Luis R. Rodriguez8fe02e12013-10-21 19:22:25 +02001429 if (chan->flags & IEEE80211_CHAN_NO_IR) {
1430 chan->flags &= ~IEEE80211_CHAN_NO_IR;
Luis R. Rodriguez6bad8762009-04-02 14:08:09 -04001431 channel_changed = true;
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05001432 }
1433
Luis R. Rodriguez6bad8762009-04-02 14:08:09 -04001434 if (channel_changed)
1435 nl80211_send_beacon_hint_event(wiphy, &chan_before, chan);
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05001436}
1437
1438/*
1439 * Called when a scan on a wiphy finds a beacon on
1440 * new channel
1441 */
1442static void wiphy_update_new_beacon(struct wiphy *wiphy,
1443 struct reg_beacon *reg_beacon)
1444{
1445 unsigned int i;
1446 struct ieee80211_supported_band *sband;
1447
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05001448 if (!wiphy->bands[reg_beacon->chan.band])
1449 return;
1450
1451 sband = wiphy->bands[reg_beacon->chan.band];
1452
1453 for (i = 0; i < sband->n_channels; i++)
1454 handle_reg_beacon(wiphy, i, reg_beacon);
1455}
1456
1457/*
1458 * Called upon reg changes or a new wiphy is added
1459 */
1460static void wiphy_update_beacon_reg(struct wiphy *wiphy)
1461{
1462 unsigned int i;
1463 struct ieee80211_supported_band *sband;
1464 struct reg_beacon *reg_beacon;
1465
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05001466 list_for_each_entry(reg_beacon, &reg_beacon_list, list) {
1467 if (!wiphy->bands[reg_beacon->chan.band])
1468 continue;
1469 sband = wiphy->bands[reg_beacon->chan.band];
1470 for (i = 0; i < sband->n_channels; i++)
1471 handle_reg_beacon(wiphy, i, reg_beacon);
1472 }
1473}
1474
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05001475/* Reap the advantages of previously found beacons */
1476static void reg_process_beacons(struct wiphy *wiphy)
1477{
Luis R. Rodriguezb1ed8dd2009-05-02 00:34:15 -04001478 /*
1479 * Means we are just firing up cfg80211, so no beacons would
1480 * have been processed yet.
1481 */
1482 if (!last_request)
1483 return;
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05001484 wiphy_update_beacon_reg(wiphy);
1485}
1486
Johannes Berg1a919312012-12-03 17:21:11 +01001487static bool is_ht40_allowed(struct ieee80211_channel *chan)
Luis R. Rodriguez038659e2009-05-02 00:37:17 -04001488{
1489 if (!chan)
Johannes Berg1a919312012-12-03 17:21:11 +01001490 return false;
Luis R. Rodriguez038659e2009-05-02 00:37:17 -04001491 if (chan->flags & IEEE80211_CHAN_DISABLED)
Johannes Berg1a919312012-12-03 17:21:11 +01001492 return false;
Luis R. Rodriguez038659e2009-05-02 00:37:17 -04001493 /* This would happen when regulatory rules disallow HT40 completely */
Felix Fietkau55b183a2013-01-11 14:22:58 +01001494 if ((chan->flags & IEEE80211_CHAN_NO_HT40) == IEEE80211_CHAN_NO_HT40)
1495 return false;
1496 return true;
Luis R. Rodriguez038659e2009-05-02 00:37:17 -04001497}
1498
1499static void reg_process_ht_flags_channel(struct wiphy *wiphy,
Johannes Bergfdc9d7b2012-12-03 18:36:09 +01001500 struct ieee80211_channel *channel)
Luis R. Rodriguez038659e2009-05-02 00:37:17 -04001501{
Johannes Bergfdc9d7b2012-12-03 18:36:09 +01001502 struct ieee80211_supported_band *sband = wiphy->bands[channel->band];
Luis R. Rodriguez038659e2009-05-02 00:37:17 -04001503 struct ieee80211_channel *channel_before = NULL, *channel_after = NULL;
1504 unsigned int i;
1505
Johannes Berg1a919312012-12-03 17:21:11 +01001506 if (!is_ht40_allowed(channel)) {
Luis R. Rodriguez038659e2009-05-02 00:37:17 -04001507 channel->flags |= IEEE80211_CHAN_NO_HT40;
1508 return;
1509 }
1510
1511 /*
1512 * We need to ensure the extension channels exist to
1513 * be able to use HT40- or HT40+, this finds them (or not)
1514 */
1515 for (i = 0; i < sband->n_channels; i++) {
1516 struct ieee80211_channel *c = &sband->channels[i];
Johannes Berg1a919312012-12-03 17:21:11 +01001517
Luis R. Rodriguez038659e2009-05-02 00:37:17 -04001518 if (c->center_freq == (channel->center_freq - 20))
1519 channel_before = c;
1520 if (c->center_freq == (channel->center_freq + 20))
1521 channel_after = c;
1522 }
1523
1524 /*
1525 * Please note that this assumes target bandwidth is 20 MHz,
1526 * if that ever changes we also need to change the below logic
1527 * to include that as well.
1528 */
Johannes Berg1a919312012-12-03 17:21:11 +01001529 if (!is_ht40_allowed(channel_before))
Luis R. Rodriguez689da1b2009-05-02 00:37:18 -04001530 channel->flags |= IEEE80211_CHAN_NO_HT40MINUS;
Luis R. Rodriguez038659e2009-05-02 00:37:17 -04001531 else
Luis R. Rodriguez689da1b2009-05-02 00:37:18 -04001532 channel->flags &= ~IEEE80211_CHAN_NO_HT40MINUS;
Luis R. Rodriguez038659e2009-05-02 00:37:17 -04001533
Johannes Berg1a919312012-12-03 17:21:11 +01001534 if (!is_ht40_allowed(channel_after))
Luis R. Rodriguez689da1b2009-05-02 00:37:18 -04001535 channel->flags |= IEEE80211_CHAN_NO_HT40PLUS;
Luis R. Rodriguez038659e2009-05-02 00:37:17 -04001536 else
Luis R. Rodriguez689da1b2009-05-02 00:37:18 -04001537 channel->flags &= ~IEEE80211_CHAN_NO_HT40PLUS;
Luis R. Rodriguez038659e2009-05-02 00:37:17 -04001538}
1539
1540static void reg_process_ht_flags_band(struct wiphy *wiphy,
Johannes Bergfdc9d7b2012-12-03 18:36:09 +01001541 struct ieee80211_supported_band *sband)
Luis R. Rodriguez038659e2009-05-02 00:37:17 -04001542{
1543 unsigned int i;
Luis R. Rodriguez038659e2009-05-02 00:37:17 -04001544
Johannes Bergfdc9d7b2012-12-03 18:36:09 +01001545 if (!sband)
1546 return;
Luis R. Rodriguez038659e2009-05-02 00:37:17 -04001547
1548 for (i = 0; i < sband->n_channels; i++)
Johannes Bergfdc9d7b2012-12-03 18:36:09 +01001549 reg_process_ht_flags_channel(wiphy, &sband->channels[i]);
Luis R. Rodriguez038659e2009-05-02 00:37:17 -04001550}
1551
1552static void reg_process_ht_flags(struct wiphy *wiphy)
1553{
Johannes Berg57fbcce2016-04-12 15:56:15 +02001554 enum nl80211_band band;
Luis R. Rodriguez038659e2009-05-02 00:37:17 -04001555
1556 if (!wiphy)
1557 return;
1558
Johannes Berg57fbcce2016-04-12 15:56:15 +02001559 for (band = 0; band < NUM_NL80211_BANDS; band++)
Johannes Bergfdc9d7b2012-12-03 18:36:09 +01001560 reg_process_ht_flags_band(wiphy, wiphy->bands[band]);
Luis R. Rodriguez038659e2009-05-02 00:37:17 -04001561}
1562
Luis R. Rodriguez0e3802d2013-11-05 09:18:12 -08001563static void reg_call_notifier(struct wiphy *wiphy,
1564 struct regulatory_request *request)
1565{
1566 if (wiphy->reg_notifier)
1567 wiphy->reg_notifier(wiphy, request);
1568}
1569
Arik Nemtsovad932f02014-11-27 09:44:55 +02001570static bool reg_wdev_chan_valid(struct wiphy *wiphy, struct wireless_dev *wdev)
1571{
Arik Nemtsovad932f02014-11-27 09:44:55 +02001572 struct cfg80211_chan_def chandef;
1573 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
Arik Nemtsov20658702014-12-29 11:59:59 +02001574 enum nl80211_iftype iftype;
Arik Nemtsovad932f02014-11-27 09:44:55 +02001575
1576 wdev_lock(wdev);
Arik Nemtsov20658702014-12-29 11:59:59 +02001577 iftype = wdev->iftype;
Arik Nemtsovad932f02014-11-27 09:44:55 +02001578
Arik Nemtsov20658702014-12-29 11:59:59 +02001579 /* make sure the interface is active */
Arik Nemtsovad932f02014-11-27 09:44:55 +02001580 if (!wdev->netdev || !netif_running(wdev->netdev))
Arik Nemtsov20658702014-12-29 11:59:59 +02001581 goto wdev_inactive_unlock;
Arik Nemtsovad932f02014-11-27 09:44:55 +02001582
Arik Nemtsov20658702014-12-29 11:59:59 +02001583 switch (iftype) {
Arik Nemtsovad932f02014-11-27 09:44:55 +02001584 case NL80211_IFTYPE_AP:
1585 case NL80211_IFTYPE_P2P_GO:
1586 if (!wdev->beacon_interval)
Arik Nemtsov20658702014-12-29 11:59:59 +02001587 goto wdev_inactive_unlock;
1588 chandef = wdev->chandef;
Arik Nemtsovad932f02014-11-27 09:44:55 +02001589 break;
Arik Nemtsov185076d2014-12-03 18:08:17 +02001590 case NL80211_IFTYPE_ADHOC:
1591 if (!wdev->ssid_len)
Arik Nemtsov20658702014-12-29 11:59:59 +02001592 goto wdev_inactive_unlock;
1593 chandef = wdev->chandef;
Arik Nemtsov185076d2014-12-03 18:08:17 +02001594 break;
Arik Nemtsovad932f02014-11-27 09:44:55 +02001595 case NL80211_IFTYPE_STATION:
1596 case NL80211_IFTYPE_P2P_CLIENT:
Arik Nemtsovad932f02014-11-27 09:44:55 +02001597 if (!wdev->current_bss ||
1598 !wdev->current_bss->pub.channel)
Arik Nemtsov20658702014-12-29 11:59:59 +02001599 goto wdev_inactive_unlock;
Arik Nemtsovad932f02014-11-27 09:44:55 +02001600
Arik Nemtsov20658702014-12-29 11:59:59 +02001601 if (!rdev->ops->get_channel ||
1602 rdev_get_channel(rdev, wdev, &chandef))
1603 cfg80211_chandef_create(&chandef,
1604 wdev->current_bss->pub.channel,
1605 NL80211_CHAN_NO_HT);
Arik Nemtsovad932f02014-11-27 09:44:55 +02001606 break;
1607 case NL80211_IFTYPE_MONITOR:
1608 case NL80211_IFTYPE_AP_VLAN:
1609 case NL80211_IFTYPE_P2P_DEVICE:
1610 /* no enforcement required */
1611 break;
1612 default:
1613 /* others not implemented for now */
1614 WARN_ON(1);
1615 break;
1616 }
1617
Arik Nemtsovad932f02014-11-27 09:44:55 +02001618 wdev_unlock(wdev);
Arik Nemtsov20658702014-12-29 11:59:59 +02001619
1620 switch (iftype) {
1621 case NL80211_IFTYPE_AP:
1622 case NL80211_IFTYPE_P2P_GO:
1623 case NL80211_IFTYPE_ADHOC:
Arik Nemtsov923b3522015-07-08 15:41:44 +03001624 return cfg80211_reg_can_beacon_relax(wiphy, &chandef, iftype);
Arik Nemtsov20658702014-12-29 11:59:59 +02001625 case NL80211_IFTYPE_STATION:
1626 case NL80211_IFTYPE_P2P_CLIENT:
1627 return cfg80211_chandef_usable(wiphy, &chandef,
1628 IEEE80211_CHAN_DISABLED);
1629 default:
1630 break;
1631 }
1632
1633 return true;
1634
1635wdev_inactive_unlock:
1636 wdev_unlock(wdev);
1637 return true;
Arik Nemtsovad932f02014-11-27 09:44:55 +02001638}
1639
1640static void reg_leave_invalid_chans(struct wiphy *wiphy)
1641{
1642 struct wireless_dev *wdev;
1643 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
1644
1645 ASSERT_RTNL();
1646
Johannes Berg53873f12016-05-03 16:52:04 +03001647 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list)
Arik Nemtsovad932f02014-11-27 09:44:55 +02001648 if (!reg_wdev_chan_valid(wiphy, wdev))
1649 cfg80211_leave(rdev, wdev);
1650}
1651
1652static void reg_check_chans_work(struct work_struct *work)
1653{
1654 struct cfg80211_registered_device *rdev;
1655
Johannes Bergc799ba62015-12-11 15:31:10 +01001656 pr_debug("Verifying active interfaces after reg change\n");
Arik Nemtsovad932f02014-11-27 09:44:55 +02001657 rtnl_lock();
1658
1659 list_for_each_entry(rdev, &cfg80211_rdev_list, list)
1660 if (!(rdev->wiphy.regulatory_flags &
1661 REGULATORY_IGNORE_STALE_KICKOFF))
1662 reg_leave_invalid_chans(&rdev->wiphy);
1663
1664 rtnl_unlock();
1665}
1666
1667static void reg_check_channels(void)
1668{
1669 /*
1670 * Give usermode a chance to do something nicer (move to another
1671 * channel, orderly disconnection), before forcing a disconnection.
1672 */
1673 mod_delayed_work(system_power_efficient_wq,
1674 &reg_check_chans,
1675 msecs_to_jiffies(REG_ENFORCE_GRACE_MS));
1676}
1677
Sven Neumanneac03e32011-08-30 23:38:53 +02001678static void wiphy_update_regulatory(struct wiphy *wiphy,
1679 enum nl80211_reg_initiator initiator)
Johannes Berg8318d782008-01-24 19:38:38 +01001680{
Johannes Berg57fbcce2016-04-12 15:56:15 +02001681 enum nl80211_band band;
Johannes Bergc492db32012-12-06 16:29:25 +01001682 struct regulatory_request *lr = get_last_request();
Sven Neumanneac03e32011-08-30 23:38:53 +02001683
Luis R. Rodriguez0e3802d2013-11-05 09:18:12 -08001684 if (ignore_reg_update(wiphy, initiator)) {
1685 /*
1686 * Regulatory updates set by CORE are ignored for custom
1687 * regulatory cards. Let us notify the changes to the driver,
1688 * as some drivers used this to restore its orig_* reg domain.
1689 */
1690 if (initiator == NL80211_REGDOM_SET_BY_CORE &&
Luis R. Rodrigueza2f73b62013-11-11 22:15:29 +01001691 wiphy->regulatory_flags & REGULATORY_CUSTOM_REG)
Luis R. Rodriguez0e3802d2013-11-05 09:18:12 -08001692 reg_call_notifier(wiphy, lr);
Sven Neumanna203c2a2011-07-12 15:52:07 +02001693 return;
Luis R. Rodriguez0e3802d2013-11-05 09:18:12 -08001694 }
Sven Neumanna203c2a2011-07-12 15:52:07 +02001695
Johannes Bergc492db32012-12-06 16:29:25 +01001696 lr->dfs_region = get_cfg80211_regdom()->dfs_region;
Luis R. Rodriguezb68e6b32011-10-11 10:59:03 -07001697
Johannes Berg57fbcce2016-04-12 15:56:15 +02001698 for (band = 0; band < NUM_NL80211_BANDS; band++)
Johannes Bergfdc9d7b2012-12-03 18:36:09 +01001699 handle_band(wiphy, initiator, wiphy->bands[band]);
Sven Neumanna203c2a2011-07-12 15:52:07 +02001700
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05001701 reg_process_beacons(wiphy);
Luis R. Rodriguez038659e2009-05-02 00:37:17 -04001702 reg_process_ht_flags(wiphy);
Luis R. Rodriguez0e3802d2013-11-05 09:18:12 -08001703 reg_call_notifier(wiphy, lr);
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07001704}
1705
Sven Neumannd7549cb2011-08-30 23:38:54 +02001706static void update_all_wiphy_regulatory(enum nl80211_reg_initiator initiator)
1707{
1708 struct cfg80211_registered_device *rdev;
Rajkumar Manoharan4a389942011-12-08 23:59:26 +05301709 struct wiphy *wiphy;
Sven Neumannd7549cb2011-08-30 23:38:54 +02001710
Johannes Berg5fe231e2013-05-08 21:45:15 +02001711 ASSERT_RTNL();
Johannes Berg458f4f92012-12-06 15:47:38 +01001712
Rajkumar Manoharan4a389942011-12-08 23:59:26 +05301713 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
1714 wiphy = &rdev->wiphy;
1715 wiphy_update_regulatory(wiphy, initiator);
Rajkumar Manoharan4a389942011-12-08 23:59:26 +05301716 }
Arik Nemtsovad932f02014-11-27 09:44:55 +02001717
1718 reg_check_channels();
Sven Neumannd7549cb2011-08-30 23:38:54 +02001719}
1720
Luis R. Rodriguez1fa25e42009-01-22 15:05:44 -08001721static void handle_channel_custom(struct wiphy *wiphy,
Johannes Bergfdc9d7b2012-12-03 18:36:09 +01001722 struct ieee80211_channel *chan,
Luis R. Rodriguez1fa25e42009-01-22 15:05:44 -08001723 const struct ieee80211_regdomain *regd)
1724{
Luis R. Rodriguez038659e2009-05-02 00:37:17 -04001725 u32 bw_flags = 0;
Luis R. Rodriguez1fa25e42009-01-22 15:05:44 -08001726 const struct ieee80211_reg_rule *reg_rule = NULL;
1727 const struct ieee80211_power_rule *power_rule = NULL;
Matthias May4edd5692015-07-17 15:28:39 +02001728 u32 bw;
Luis R. Rodriguez1fa25e42009-01-22 15:05:44 -08001729
Matthias May4edd5692015-07-17 15:28:39 +02001730 for (bw = MHZ_TO_KHZ(20); bw >= MHZ_TO_KHZ(5); bw = bw / 2) {
Michal Sojka49172872015-11-23 19:27:14 +01001731 reg_rule = freq_reg_info_regd(MHZ_TO_KHZ(chan->center_freq),
Matthias May4edd5692015-07-17 15:28:39 +02001732 regd, bw);
1733 if (!IS_ERR(reg_rule))
1734 break;
1735 }
Luis R. Rodriguezac46d482009-05-01 18:44:50 -04001736
Johannes Berg361c9c82012-12-06 15:57:14 +01001737 if (IS_ERR(reg_rule)) {
Johannes Bergc799ba62015-12-11 15:31:10 +01001738 pr_debug("Disabling freq %d MHz as custom regd has no rule that fits it\n",
1739 chan->center_freq);
Arik Nemtsovdb8dfee2014-12-15 19:26:02 +02001740 if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) {
1741 chan->flags |= IEEE80211_CHAN_DISABLED;
1742 } else {
1743 chan->orig_flags |= IEEE80211_CHAN_DISABLED;
1744 chan->flags = chan->orig_flags;
1745 }
Luis R. Rodriguez1fa25e42009-01-22 15:05:44 -08001746 return;
1747 }
1748
1749 power_rule = &reg_rule->power_rule;
Michal Sojka1aeb1352015-11-23 19:27:16 +01001750 bw_flags = reg_rule_to_chan_bw_flags(regd, reg_rule, chan);
Luis R. Rodriguez038659e2009-05-02 00:37:17 -04001751
Arik Nemtsov2e18b382014-11-16 16:37:46 +02001752 chan->dfs_state_entered = jiffies;
Arik Nemtsovc7ab5082014-11-16 16:37:47 +02001753 chan->dfs_state = NL80211_DFS_USABLE;
1754
1755 chan->beacon_found = false;
Arik Nemtsovdb8dfee2014-12-15 19:26:02 +02001756
1757 if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED)
1758 chan->flags = chan->orig_flags | bw_flags |
1759 map_regdom_flags(reg_rule->flags);
1760 else
1761 chan->flags |= map_regdom_flags(reg_rule->flags) | bw_flags;
1762
Luis R. Rodriguez1fa25e42009-01-22 15:05:44 -08001763 chan->max_antenna_gain = (int) MBI_TO_DBI(power_rule->max_antenna_gain);
Felix Fietkau279f0f52012-10-17 13:56:20 +02001764 chan->max_reg_power = chan->max_power =
1765 (int) MBM_TO_DBM(power_rule->max_eirp);
Arik Nemtsov2e18b382014-11-16 16:37:46 +02001766
1767 if (chan->flags & IEEE80211_CHAN_RADAR) {
1768 if (reg_rule->dfs_cac_ms)
1769 chan->dfs_cac_ms = reg_rule->dfs_cac_ms;
1770 else
1771 chan->dfs_cac_ms = IEEE80211_DFS_MIN_CAC_TIME_MS;
1772 }
1773
1774 chan->max_power = chan->max_reg_power;
Luis R. Rodriguez1fa25e42009-01-22 15:05:44 -08001775}
1776
Johannes Bergfdc9d7b2012-12-03 18:36:09 +01001777static void handle_band_custom(struct wiphy *wiphy,
1778 struct ieee80211_supported_band *sband,
Luis R. Rodriguez1fa25e42009-01-22 15:05:44 -08001779 const struct ieee80211_regdomain *regd)
1780{
1781 unsigned int i;
Luis R. Rodriguez1fa25e42009-01-22 15:05:44 -08001782
Johannes Bergfdc9d7b2012-12-03 18:36:09 +01001783 if (!sband)
1784 return;
Luis R. Rodriguez1fa25e42009-01-22 15:05:44 -08001785
1786 for (i = 0; i < sband->n_channels; i++)
Johannes Bergfdc9d7b2012-12-03 18:36:09 +01001787 handle_channel_custom(wiphy, &sband->channels[i], regd);
Luis R. Rodriguez1fa25e42009-01-22 15:05:44 -08001788}
1789
1790/* Used by drivers prior to wiphy registration */
1791void wiphy_apply_custom_regulatory(struct wiphy *wiphy,
1792 const struct ieee80211_regdomain *regd)
1793{
Johannes Berg57fbcce2016-04-12 15:56:15 +02001794 enum nl80211_band band;
Luis R. Rodriguezbbcf3f02009-05-19 17:49:47 -04001795 unsigned int bands_set = 0;
Luis R. Rodriguezac46d482009-05-01 18:44:50 -04001796
Luis R. Rodrigueza2f73b62013-11-11 22:15:29 +01001797 WARN(!(wiphy->regulatory_flags & REGULATORY_CUSTOM_REG),
1798 "wiphy should have REGULATORY_CUSTOM_REG\n");
1799 wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG;
Luis R. Rodriguez222ea582013-11-05 09:18:00 -08001800
Johannes Berg57fbcce2016-04-12 15:56:15 +02001801 for (band = 0; band < NUM_NL80211_BANDS; band++) {
Luis R. Rodriguezbbcf3f02009-05-19 17:49:47 -04001802 if (!wiphy->bands[band])
1803 continue;
Johannes Bergfdc9d7b2012-12-03 18:36:09 +01001804 handle_band_custom(wiphy, wiphy->bands[band], regd);
Luis R. Rodriguezbbcf3f02009-05-19 17:49:47 -04001805 bands_set++;
Luis R. Rodriguez1fa25e42009-01-22 15:05:44 -08001806 }
Luis R. Rodriguezbbcf3f02009-05-19 17:49:47 -04001807
1808 /*
1809 * no point in calling this if it won't have any effect
Johannes Berg1a919312012-12-03 17:21:11 +01001810 * on your device's supported bands.
Luis R. Rodriguezbbcf3f02009-05-19 17:49:47 -04001811 */
1812 WARN_ON(!bands_set);
Luis R. Rodriguez1fa25e42009-01-22 15:05:44 -08001813}
1814EXPORT_SYMBOL(wiphy_apply_custom_regulatory);
1815
Luis R. Rodriguezb2e253c2010-11-17 21:46:09 -08001816static void reg_set_request_processed(void)
1817{
1818 bool need_more_processing = false;
Johannes Bergc492db32012-12-06 16:29:25 +01001819 struct regulatory_request *lr = get_last_request();
Luis R. Rodriguezb2e253c2010-11-17 21:46:09 -08001820
Johannes Bergc492db32012-12-06 16:29:25 +01001821 lr->processed = true;
Luis R. Rodriguezb2e253c2010-11-17 21:46:09 -08001822
1823 spin_lock(&reg_requests_lock);
1824 if (!list_empty(&reg_requests_list))
1825 need_more_processing = true;
1826 spin_unlock(&reg_requests_lock);
1827
Johannes Bergb6863032015-10-15 09:25:18 +02001828 cancel_crda_timeout();
Luis R. Rodrigueza90c7a32011-04-05 10:49:04 -07001829
Luis R. Rodriguezb2e253c2010-11-17 21:46:09 -08001830 if (need_more_processing)
1831 schedule_work(&reg_work);
1832}
1833
Luis R. Rodriguezd1c96a92009-02-21 00:24:13 -05001834/**
Luis R. Rodriguezb3eb7f32013-11-05 09:18:03 -08001835 * reg_process_hint_core - process core regulatory requests
1836 * @pending_request: a pending core regulatory request
1837 *
1838 * The wireless subsystem can use this function to process
1839 * a regulatory request issued by the regulatory core.
Luis R. Rodriguezb3eb7f32013-11-05 09:18:03 -08001840 */
Johannes Bergd34265a2015-10-15 13:05:55 +02001841static enum reg_request_treatment
1842reg_process_hint_core(struct regulatory_request *core_request)
Luis R. Rodriguezb3eb7f32013-11-05 09:18:03 -08001843{
Johannes Bergcecbb062015-10-15 08:47:34 +02001844 if (reg_query_database(core_request)) {
Johannes Berg25b20db2015-10-15 12:05:05 +02001845 core_request->intersect = false;
1846 core_request->processed = false;
1847 reg_update_last_request(core_request);
Johannes Bergd34265a2015-10-15 13:05:55 +02001848 return REG_REQ_OK;
Johannes Berg25b20db2015-10-15 12:05:05 +02001849 }
Johannes Bergd34265a2015-10-15 13:05:55 +02001850
1851 return REG_REQ_IGNORE;
Luis R. Rodriguezb3eb7f32013-11-05 09:18:03 -08001852}
1853
Luis R. Rodriguez0d97a612013-11-05 09:18:04 -08001854static enum reg_request_treatment
1855__reg_process_hint_user(struct regulatory_request *user_request)
1856{
1857 struct regulatory_request *lr = get_last_request();
1858
1859 if (reg_request_cell_base(user_request))
1860 return reg_ignore_cell_hint(user_request);
1861
1862 if (reg_request_cell_base(lr))
1863 return REG_REQ_IGNORE;
1864
1865 if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE)
1866 return REG_REQ_INTERSECT;
1867 /*
1868 * If the user knows better the user should set the regdom
1869 * to their country before the IE is picked up
1870 */
1871 if (lr->initiator == NL80211_REGDOM_SET_BY_USER &&
1872 lr->intersect)
1873 return REG_REQ_IGNORE;
1874 /*
1875 * Process user requests only after previous user/driver/core
1876 * requests have been processed
1877 */
1878 if ((lr->initiator == NL80211_REGDOM_SET_BY_CORE ||
1879 lr->initiator == NL80211_REGDOM_SET_BY_DRIVER ||
Mihir Shetebe4ca6b2014-03-27 13:04:15 +05301880 lr->initiator == NL80211_REGDOM_SET_BY_USER)) {
1881 if (lr->intersect) {
1882 if (!is_cfg80211_regdom_intersected())
1883 return REG_REQ_IGNORE;
1884 } else if (regdom_changes(lr->alpha2)) {
1885 return REG_REQ_IGNORE;
1886 }
1887 }
Luis R. Rodriguez0d97a612013-11-05 09:18:04 -08001888
1889 if (!regdom_changes(user_request->alpha2))
1890 return REG_REQ_ALREADY_SET;
1891
1892 return REG_REQ_OK;
1893}
1894
1895/**
1896 * reg_process_hint_user - process user regulatory requests
1897 * @user_request: a pending user regulatory request
1898 *
1899 * The wireless subsystem can use this function to process
1900 * a regulatory request initiated by userspace.
Luis R. Rodriguez0d97a612013-11-05 09:18:04 -08001901 */
Johannes Bergd34265a2015-10-15 13:05:55 +02001902static enum reg_request_treatment
1903reg_process_hint_user(struct regulatory_request *user_request)
Luis R. Rodriguez0d97a612013-11-05 09:18:04 -08001904{
1905 enum reg_request_treatment treatment;
Luis R. Rodriguez0d97a612013-11-05 09:18:04 -08001906
1907 treatment = __reg_process_hint_user(user_request);
1908 if (treatment == REG_REQ_IGNORE ||
Johannes Bergd34265a2015-10-15 13:05:55 +02001909 treatment == REG_REQ_ALREADY_SET)
1910 return REG_REQ_IGNORE;
Luis R. Rodriguez0d97a612013-11-05 09:18:04 -08001911
Luis R. Rodriguez0d97a612013-11-05 09:18:04 -08001912 user_request->intersect = treatment == REG_REQ_INTERSECT;
1913 user_request->processed = false;
Luis R. Rodriguez5ad6ef52013-11-05 09:18:08 -08001914
Johannes Bergcecbb062015-10-15 08:47:34 +02001915 if (reg_query_database(user_request)) {
Johannes Berg25b20db2015-10-15 12:05:05 +02001916 reg_update_last_request(user_request);
1917 user_alpha2[0] = user_request->alpha2[0];
1918 user_alpha2[1] = user_request->alpha2[1];
Johannes Bergd34265a2015-10-15 13:05:55 +02001919 return REG_REQ_OK;
Johannes Berg25b20db2015-10-15 12:05:05 +02001920 }
Johannes Bergd34265a2015-10-15 13:05:55 +02001921
1922 return REG_REQ_IGNORE;
Luis R. Rodriguez0d97a612013-11-05 09:18:04 -08001923}
1924
Luis R. Rodriguez21636c72013-11-05 09:18:05 -08001925static enum reg_request_treatment
1926__reg_process_hint_driver(struct regulatory_request *driver_request)
1927{
1928 struct regulatory_request *lr = get_last_request();
1929
1930 if (lr->initiator == NL80211_REGDOM_SET_BY_CORE) {
1931 if (regdom_changes(driver_request->alpha2))
1932 return REG_REQ_OK;
1933 return REG_REQ_ALREADY_SET;
1934 }
1935
1936 /*
1937 * This would happen if you unplug and plug your card
1938 * back in or if you add a new device for which the previously
1939 * loaded card also agrees on the regulatory domain.
1940 */
1941 if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER &&
1942 !regdom_changes(driver_request->alpha2))
1943 return REG_REQ_ALREADY_SET;
1944
1945 return REG_REQ_INTERSECT;
1946}
1947
1948/**
1949 * reg_process_hint_driver - process driver regulatory requests
1950 * @driver_request: a pending driver regulatory request
1951 *
1952 * The wireless subsystem can use this function to process
1953 * a regulatory request issued by an 802.11 driver.
1954 *
1955 * Returns one of the different reg request treatment values.
1956 */
1957static enum reg_request_treatment
1958reg_process_hint_driver(struct wiphy *wiphy,
1959 struct regulatory_request *driver_request)
1960{
Arik Nemtsov34f05f52014-12-04 12:22:16 +02001961 const struct ieee80211_regdomain *regd, *tmp;
Luis R. Rodriguez21636c72013-11-05 09:18:05 -08001962 enum reg_request_treatment treatment;
Luis R. Rodriguez21636c72013-11-05 09:18:05 -08001963
1964 treatment = __reg_process_hint_driver(driver_request);
1965
1966 switch (treatment) {
1967 case REG_REQ_OK:
1968 break;
1969 case REG_REQ_IGNORE:
Johannes Bergd34265a2015-10-15 13:05:55 +02001970 return REG_REQ_IGNORE;
Luis R. Rodriguez21636c72013-11-05 09:18:05 -08001971 case REG_REQ_INTERSECT:
Luis R. Rodriguez21636c72013-11-05 09:18:05 -08001972 case REG_REQ_ALREADY_SET:
1973 regd = reg_copy_regd(get_cfg80211_regdom());
Johannes Bergd34265a2015-10-15 13:05:55 +02001974 if (IS_ERR(regd))
1975 return REG_REQ_IGNORE;
Arik Nemtsov34f05f52014-12-04 12:22:16 +02001976
1977 tmp = get_wiphy_regdom(wiphy);
Luis R. Rodriguez21636c72013-11-05 09:18:05 -08001978 rcu_assign_pointer(wiphy->regd, regd);
Arik Nemtsov34f05f52014-12-04 12:22:16 +02001979 rcu_free_regdom(tmp);
Luis R. Rodriguez21636c72013-11-05 09:18:05 -08001980 }
1981
Luis R. Rodriguez21636c72013-11-05 09:18:05 -08001982
1983 driver_request->intersect = treatment == REG_REQ_INTERSECT;
1984 driver_request->processed = false;
Luis R. Rodriguez5ad6ef52013-11-05 09:18:08 -08001985
Luis R. Rodriguez21636c72013-11-05 09:18:05 -08001986 /*
1987 * Since CRDA will not be called in this case as we already
1988 * have applied the requested regulatory domain before we just
1989 * inform userspace we have processed the request
1990 */
1991 if (treatment == REG_REQ_ALREADY_SET) {
1992 nl80211_send_reg_change_event(driver_request);
Johannes Berg25b20db2015-10-15 12:05:05 +02001993 reg_update_last_request(driver_request);
Luis R. Rodriguez21636c72013-11-05 09:18:05 -08001994 reg_set_request_processed();
Johannes Berg480908a2015-10-15 12:58:58 +02001995 return REG_REQ_ALREADY_SET;
Luis R. Rodriguez21636c72013-11-05 09:18:05 -08001996 }
1997
Johannes Bergd34265a2015-10-15 13:05:55 +02001998 if (reg_query_database(driver_request)) {
Johannes Berg25b20db2015-10-15 12:05:05 +02001999 reg_update_last_request(driver_request);
Johannes Bergd34265a2015-10-15 13:05:55 +02002000 return REG_REQ_OK;
2001 }
Johannes Berg25b20db2015-10-15 12:05:05 +02002002
Johannes Bergd34265a2015-10-15 13:05:55 +02002003 return REG_REQ_IGNORE;
Luis R. Rodriguez21636c72013-11-05 09:18:05 -08002004}
2005
Luis R. Rodriguezb23e7a92013-11-05 09:18:06 -08002006static enum reg_request_treatment
2007__reg_process_hint_country_ie(struct wiphy *wiphy,
2008 struct regulatory_request *country_ie_request)
2009{
2010 struct wiphy *last_wiphy = NULL;
2011 struct regulatory_request *lr = get_last_request();
2012
2013 if (reg_request_cell_base(lr)) {
2014 /* Trust a Cell base station over the AP's country IE */
2015 if (regdom_changes(country_ie_request->alpha2))
2016 return REG_REQ_IGNORE;
2017 return REG_REQ_ALREADY_SET;
Luis R. Rodriguez2a901462013-11-11 22:15:31 +01002018 } else {
2019 if (wiphy->regulatory_flags & REGULATORY_COUNTRY_IE_IGNORE)
2020 return REG_REQ_IGNORE;
Luis R. Rodriguezb23e7a92013-11-05 09:18:06 -08002021 }
2022
Luis R. Rodriguezb23e7a92013-11-05 09:18:06 -08002023 if (unlikely(!is_an_alpha2(country_ie_request->alpha2)))
2024 return -EINVAL;
Luis R. Rodriguez2f1c6c52013-11-05 09:18:07 -08002025
2026 if (lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE)
2027 return REG_REQ_OK;
2028
2029 last_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx);
2030
2031 if (last_wiphy != wiphy) {
Luis R. Rodriguezb23e7a92013-11-05 09:18:06 -08002032 /*
Luis R. Rodriguez2f1c6c52013-11-05 09:18:07 -08002033 * Two cards with two APs claiming different
2034 * Country IE alpha2s. We could
2035 * intersect them, but that seems unlikely
2036 * to be correct. Reject second one for now.
Luis R. Rodriguezb23e7a92013-11-05 09:18:06 -08002037 */
Luis R. Rodriguez2f1c6c52013-11-05 09:18:07 -08002038 if (regdom_changes(country_ie_request->alpha2))
2039 return REG_REQ_IGNORE;
Luis R. Rodriguezb23e7a92013-11-05 09:18:06 -08002040 return REG_REQ_ALREADY_SET;
2041 }
Emmanuel Grumbach70dcec52014-12-02 09:53:25 +02002042
2043 if (regdom_changes(country_ie_request->alpha2))
Luis R. Rodriguez2f1c6c52013-11-05 09:18:07 -08002044 return REG_REQ_OK;
2045 return REG_REQ_ALREADY_SET;
Luis R. Rodriguezb23e7a92013-11-05 09:18:06 -08002046}
2047
Luis R. Rodriguezb3eb7f32013-11-05 09:18:03 -08002048/**
Luis R. Rodriguezb23e7a92013-11-05 09:18:06 -08002049 * reg_process_hint_country_ie - process regulatory requests from country IEs
2050 * @country_ie_request: a regulatory request from a country IE
Luis R. Rodriguezd1c96a92009-02-21 00:24:13 -05002051 *
Luis R. Rodriguezb23e7a92013-11-05 09:18:06 -08002052 * The wireless subsystem can use this function to process
2053 * a regulatory request issued by a country Information Element.
Luis R. Rodriguezd1c96a92009-02-21 00:24:13 -05002054 *
Johannes Berg2f922122012-12-03 17:54:55 +01002055 * Returns one of the different reg request treatment values.
Luis R. Rodriguezd1c96a92009-02-21 00:24:13 -05002056 */
Johannes Berg2f922122012-12-03 17:54:55 +01002057static enum reg_request_treatment
Luis R. Rodriguezb23e7a92013-11-05 09:18:06 -08002058reg_process_hint_country_ie(struct wiphy *wiphy,
2059 struct regulatory_request *country_ie_request)
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002060{
Johannes Berg2f922122012-12-03 17:54:55 +01002061 enum reg_request_treatment treatment;
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002062
Luis R. Rodriguezb23e7a92013-11-05 09:18:06 -08002063 treatment = __reg_process_hint_country_ie(wiphy, country_ie_request);
Luis R. Rodriguez761cf7e2009-02-21 00:04:25 -05002064
Johannes Berg2f922122012-12-03 17:54:55 +01002065 switch (treatment) {
Johannes Berg2f922122012-12-03 17:54:55 +01002066 case REG_REQ_OK:
2067 break;
Luis R. Rodriguezb23e7a92013-11-05 09:18:06 -08002068 case REG_REQ_IGNORE:
Johannes Bergd34265a2015-10-15 13:05:55 +02002069 return REG_REQ_IGNORE;
Luis R. Rodriguezb23e7a92013-11-05 09:18:06 -08002070 case REG_REQ_ALREADY_SET:
Arik Nemtsovc8883932014-04-21 20:39:34 -07002071 reg_free_request(country_ie_request);
Johannes Berg480908a2015-10-15 12:58:58 +02002072 return REG_REQ_ALREADY_SET;
Luis R. Rodriguezb23e7a92013-11-05 09:18:06 -08002073 case REG_REQ_INTERSECT:
Luis R. Rodriguezb23e7a92013-11-05 09:18:06 -08002074 /*
2075 * This doesn't happen yet, not sure we
2076 * ever want to support it for this case.
2077 */
2078 WARN_ONCE(1, "Unexpected intersection for country IEs");
Johannes Bergd34265a2015-10-15 13:05:55 +02002079 return REG_REQ_IGNORE;
Luis R. Rodriguez3e0c3ff2009-01-07 17:43:34 -08002080 }
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002081
Luis R. Rodriguezb23e7a92013-11-05 09:18:06 -08002082 country_ie_request->intersect = false;
2083 country_ie_request->processed = false;
Luis R. Rodriguez5ad6ef52013-11-05 09:18:08 -08002084
Johannes Bergd34265a2015-10-15 13:05:55 +02002085 if (reg_query_database(country_ie_request)) {
Johannes Berg25b20db2015-10-15 12:05:05 +02002086 reg_update_last_request(country_ie_request);
Johannes Bergd34265a2015-10-15 13:05:55 +02002087 return REG_REQ_OK;
2088 }
Luis R. Rodriguezd951c1d2009-02-21 00:24:15 -05002089
Johannes Bergd34265a2015-10-15 13:05:55 +02002090 return REG_REQ_IGNORE;
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002091}
2092
Luis R. Rodriguez30a548c2009-05-02 01:17:27 -04002093/* This processes *all* regulatory hints */
Luis R. Rodriguez1daa37c2013-11-05 09:18:02 -08002094static void reg_process_hint(struct regulatory_request *reg_request)
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002095{
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002096 struct wiphy *wiphy = NULL;
Luis R. Rodriguezb3eb7f32013-11-05 09:18:03 -08002097 enum reg_request_treatment treatment;
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002098
Johannes Bergf4173762012-12-03 18:23:37 +01002099 if (reg_request->wiphy_idx != WIPHY_IDX_INVALID)
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002100 wiphy = wiphy_idx_to_wiphy(reg_request->wiphy_idx);
2101
Luis R. Rodriguezb3eb7f32013-11-05 09:18:03 -08002102 switch (reg_request->initiator) {
2103 case NL80211_REGDOM_SET_BY_CORE:
Johannes Bergd34265a2015-10-15 13:05:55 +02002104 treatment = reg_process_hint_core(reg_request);
2105 break;
Luis R. Rodriguezb3eb7f32013-11-05 09:18:03 -08002106 case NL80211_REGDOM_SET_BY_USER:
Johannes Bergd34265a2015-10-15 13:05:55 +02002107 treatment = reg_process_hint_user(reg_request);
2108 break;
Luis R. Rodriguezb3eb7f32013-11-05 09:18:03 -08002109 case NL80211_REGDOM_SET_BY_DRIVER:
Ilan Peer772f0382014-01-14 15:17:23 +02002110 if (!wiphy)
2111 goto out_free;
Luis R. Rodriguez21636c72013-11-05 09:18:05 -08002112 treatment = reg_process_hint_driver(wiphy, reg_request);
2113 break;
Luis R. Rodriguezb3eb7f32013-11-05 09:18:03 -08002114 case NL80211_REGDOM_SET_BY_COUNTRY_IE:
Ilan Peer772f0382014-01-14 15:17:23 +02002115 if (!wiphy)
2116 goto out_free;
Luis R. Rodriguezb23e7a92013-11-05 09:18:06 -08002117 treatment = reg_process_hint_country_ie(wiphy, reg_request);
Luis R. Rodriguezb3eb7f32013-11-05 09:18:03 -08002118 break;
2119 default:
2120 WARN(1, "invalid initiator %d\n", reg_request->initiator);
Ilan Peer772f0382014-01-14 15:17:23 +02002121 goto out_free;
Luis R. Rodriguezb3eb7f32013-11-05 09:18:03 -08002122 }
2123
Johannes Bergd34265a2015-10-15 13:05:55 +02002124 if (treatment == REG_REQ_IGNORE)
2125 goto out_free;
2126
Johannes Berg480908a2015-10-15 12:58:58 +02002127 WARN(treatment != REG_REQ_OK && treatment != REG_REQ_ALREADY_SET,
2128 "unexpected treatment value %d\n", treatment);
2129
John Linville841b3512015-06-24 11:42:25 -04002130 /* This is required so that the orig_* parameters are saved.
2131 * NOTE: treatment must be set for any case that reaches here!
2132 */
Luis R. Rodriguezb23e7a92013-11-05 09:18:06 -08002133 if (treatment == REG_REQ_ALREADY_SET && wiphy &&
Arik Nemtsovad932f02014-11-27 09:44:55 +02002134 wiphy->regulatory_flags & REGULATORY_STRICT_REG) {
Luis R. Rodriguezb23e7a92013-11-05 09:18:06 -08002135 wiphy_update_regulatory(wiphy, reg_request->initiator);
Arik Nemtsovad932f02014-11-27 09:44:55 +02002136 reg_check_channels();
2137 }
Ilan Peer772f0382014-01-14 15:17:23 +02002138
2139 return;
2140
2141out_free:
Arik Nemtsovc8883932014-04-21 20:39:34 -07002142 reg_free_request(reg_request);
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002143}
2144
Arik Nemtsovef51fb12015-01-07 16:47:20 +02002145static bool reg_only_self_managed_wiphys(void)
2146{
2147 struct cfg80211_registered_device *rdev;
2148 struct wiphy *wiphy;
2149 bool self_managed_found = false;
2150
2151 ASSERT_RTNL();
2152
2153 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
2154 wiphy = &rdev->wiphy;
2155 if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED)
2156 self_managed_found = true;
2157 else
2158 return false;
2159 }
2160
2161 /* make sure at least one self-managed wiphy exists */
2162 return self_managed_found;
2163}
2164
Luis R. Rodriguezb2e253c2010-11-17 21:46:09 -08002165/*
2166 * Processes regulatory hints, this is all the NL80211_REGDOM_SET_BY_*
2167 * Regulatory hints come on a first come first serve basis and we
2168 * must process each one atomically.
2169 */
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002170static void reg_process_pending_hints(void)
Luis R. Rodriguezb0e28802010-11-17 21:46:08 -08002171{
Johannes Bergc492db32012-12-06 16:29:25 +01002172 struct regulatory_request *reg_request, *lr;
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002173
Johannes Bergc492db32012-12-06 16:29:25 +01002174 lr = get_last_request();
Luis R. Rodriguezb0e28802010-11-17 21:46:08 -08002175
Luis R. Rodriguezb2e253c2010-11-17 21:46:09 -08002176 /* When last_request->processed becomes true this will be rescheduled */
Johannes Bergc492db32012-12-06 16:29:25 +01002177 if (lr && !lr->processed) {
Luis R. Rodriguez96cce122014-04-21 20:39:35 -07002178 reg_process_hint(lr);
Johannes Berg5fe231e2013-05-08 21:45:15 +02002179 return;
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002180 }
Luis R. Rodriguezb2e253c2010-11-17 21:46:09 -08002181
2182 spin_lock(&reg_requests_lock);
2183
2184 if (list_empty(&reg_requests_list)) {
2185 spin_unlock(&reg_requests_lock);
Johannes Berg5fe231e2013-05-08 21:45:15 +02002186 return;
Luis R. Rodriguezb2e253c2010-11-17 21:46:09 -08002187 }
2188
2189 reg_request = list_first_entry(&reg_requests_list,
2190 struct regulatory_request,
2191 list);
2192 list_del_init(&reg_request->list);
2193
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002194 spin_unlock(&reg_requests_lock);
Luis R. Rodriguezb0e28802010-11-17 21:46:08 -08002195
Arik Nemtsovef51fb12015-01-07 16:47:20 +02002196 if (reg_only_self_managed_wiphys()) {
2197 reg_free_request(reg_request);
2198 return;
2199 }
2200
Luis R. Rodriguez1daa37c2013-11-05 09:18:02 -08002201 reg_process_hint(reg_request);
Ben2e54a682015-03-12 09:37:34 -04002202
2203 lr = get_last_request();
2204
2205 spin_lock(&reg_requests_lock);
2206 if (!list_empty(&reg_requests_list) && lr && lr->processed)
2207 schedule_work(&reg_work);
2208 spin_unlock(&reg_requests_lock);
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002209}
2210
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05002211/* Processes beacon hints -- this has nothing to do with country IEs */
2212static void reg_process_pending_beacon_hints(void)
2213{
Johannes Berg79c97e92009-07-07 03:56:12 +02002214 struct cfg80211_registered_device *rdev;
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05002215 struct reg_beacon *pending_beacon, *tmp;
2216
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05002217 /* This goes through the _pending_ beacon list */
2218 spin_lock_bh(&reg_pending_beacons_lock);
2219
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05002220 list_for_each_entry_safe(pending_beacon, tmp,
2221 &reg_pending_beacons, list) {
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05002222 list_del_init(&pending_beacon->list);
2223
2224 /* Applies the beacon hint to current wiphys */
Johannes Berg79c97e92009-07-07 03:56:12 +02002225 list_for_each_entry(rdev, &cfg80211_rdev_list, list)
2226 wiphy_update_new_beacon(&rdev->wiphy, pending_beacon);
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05002227
2228 /* Remembers the beacon hint for new wiphys or reg changes */
2229 list_add_tail(&pending_beacon->list, &reg_beacon_list);
2230 }
2231
2232 spin_unlock_bh(&reg_pending_beacons_lock);
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05002233}
2234
Jonathan Doronb0d7aa52014-12-15 19:26:00 +02002235static void reg_process_self_managed_hints(void)
2236{
2237 struct cfg80211_registered_device *rdev;
2238 struct wiphy *wiphy;
2239 const struct ieee80211_regdomain *tmp;
2240 const struct ieee80211_regdomain *regd;
Johannes Berg57fbcce2016-04-12 15:56:15 +02002241 enum nl80211_band band;
Jonathan Doronb0d7aa52014-12-15 19:26:00 +02002242 struct regulatory_request request = {};
2243
2244 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
2245 wiphy = &rdev->wiphy;
2246
2247 spin_lock(&reg_requests_lock);
2248 regd = rdev->requested_regd;
2249 rdev->requested_regd = NULL;
2250 spin_unlock(&reg_requests_lock);
2251
2252 if (regd == NULL)
2253 continue;
2254
2255 tmp = get_wiphy_regdom(wiphy);
2256 rcu_assign_pointer(wiphy->regd, regd);
2257 rcu_free_regdom(tmp);
2258
Johannes Berg57fbcce2016-04-12 15:56:15 +02002259 for (band = 0; band < NUM_NL80211_BANDS; band++)
Jonathan Doronb0d7aa52014-12-15 19:26:00 +02002260 handle_band_custom(wiphy, wiphy->bands[band], regd);
2261
2262 reg_process_ht_flags(wiphy);
2263
2264 request.wiphy_idx = get_wiphy_idx(wiphy);
2265 request.alpha2[0] = regd->alpha2[0];
2266 request.alpha2[1] = regd->alpha2[1];
2267 request.initiator = NL80211_REGDOM_SET_BY_DRIVER;
2268
2269 nl80211_send_wiphy_reg_change_event(&request);
2270 }
2271
2272 reg_check_channels();
2273}
2274
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002275static void reg_todo(struct work_struct *work)
2276{
Johannes Berg5fe231e2013-05-08 21:45:15 +02002277 rtnl_lock();
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002278 reg_process_pending_hints();
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05002279 reg_process_pending_beacon_hints();
Jonathan Doronb0d7aa52014-12-15 19:26:00 +02002280 reg_process_self_managed_hints();
Johannes Berg5fe231e2013-05-08 21:45:15 +02002281 rtnl_unlock();
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002282}
2283
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002284static void queue_regulatory_request(struct regulatory_request *request)
2285{
Johannes Bergd4f2c882012-12-03 18:59:58 +01002286 request->alpha2[0] = toupper(request->alpha2[0]);
2287 request->alpha2[1] = toupper(request->alpha2[1]);
John W. Linvillec61029c2010-08-05 14:26:24 -04002288
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002289 spin_lock(&reg_requests_lock);
2290 list_add_tail(&request->list, &reg_requests_list);
2291 spin_unlock(&reg_requests_lock);
2292
2293 schedule_work(&reg_work);
2294}
2295
Luis R. Rodriguez09d989d2010-01-29 19:58:57 -05002296/*
2297 * Core regulatory hint -- happens during cfg80211_init()
2298 * and when we restore regulatory settings.
2299 */
Luis R. Rodriguezba25c142009-02-21 00:04:23 -05002300static int regulatory_hint_core(const char *alpha2)
2301{
2302 struct regulatory_request *request;
2303
Johannes Berg1a919312012-12-03 17:21:11 +01002304 request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL);
Luis R. Rodriguezba25c142009-02-21 00:04:23 -05002305 if (!request)
2306 return -ENOMEM;
2307
2308 request->alpha2[0] = alpha2[0];
2309 request->alpha2[1] = alpha2[1];
Luis R. Rodriguez7db90f42009-03-09 22:07:41 -04002310 request->initiator = NL80211_REGDOM_SET_BY_CORE;
Luis R. Rodriguezba25c142009-02-21 00:04:23 -05002311
Luis R. Rodriguez31e99722010-11-17 21:46:06 -08002312 queue_regulatory_request(request);
Luis R. Rodriguez5078b2e2009-05-13 17:04:42 -04002313
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002314 return 0;
Luis R. Rodriguezba25c142009-02-21 00:04:23 -05002315}
2316
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002317/* User hints */
Luis R. Rodriguez57b5ce02012-07-12 11:49:18 -07002318int regulatory_hint_user(const char *alpha2,
2319 enum nl80211_user_reg_hint_type user_reg_hint_type)
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002320{
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002321 struct regulatory_request *request;
2322
Johannes Bergfdc9d7b2012-12-03 18:36:09 +01002323 if (WARN_ON(!alpha2))
2324 return -EINVAL;
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002325
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002326 request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL);
2327 if (!request)
2328 return -ENOMEM;
2329
Johannes Bergf4173762012-12-03 18:23:37 +01002330 request->wiphy_idx = WIPHY_IDX_INVALID;
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002331 request->alpha2[0] = alpha2[0];
2332 request->alpha2[1] = alpha2[1];
Luis R. Rodrigueze12822e2010-01-04 11:37:39 -05002333 request->initiator = NL80211_REGDOM_SET_BY_USER;
Luis R. Rodriguez57b5ce02012-07-12 11:49:18 -07002334 request->user_reg_hint_type = user_reg_hint_type;
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002335
Ilan peerc37722b2015-03-30 15:15:49 +03002336 /* Allow calling CRDA again */
Johannes Bergb6863032015-10-15 09:25:18 +02002337 reset_crda_timeouts();
Ilan peerc37722b2015-03-30 15:15:49 +03002338
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002339 queue_regulatory_request(request);
2340
2341 return 0;
2342}
Mihir Sheted62103c2013-10-14 00:54:40 +05302343EXPORT_SYMBOL(regulatory_hint_user);
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002344
Ilan peer05050752015-03-04 00:32:06 -05002345int regulatory_hint_indoor(bool is_indoor, u32 portid)
Ilan Peer52616f22014-02-25 16:26:00 +02002346{
Ilan peer05050752015-03-04 00:32:06 -05002347 spin_lock(&reg_indoor_lock);
Ilan Peer52616f22014-02-25 16:26:00 +02002348
Ilan peer05050752015-03-04 00:32:06 -05002349 /* It is possible that more than one user space process is trying to
2350 * configure the indoor setting. To handle such cases, clear the indoor
2351 * setting in case that some process does not think that the device
2352 * is operating in an indoor environment. In addition, if a user space
2353 * process indicates that it is controlling the indoor setting, save its
2354 * portid, i.e., make it the owner.
2355 */
2356 reg_is_indoor = is_indoor;
2357 if (reg_is_indoor) {
2358 if (!reg_is_indoor_portid)
2359 reg_is_indoor_portid = portid;
2360 } else {
2361 reg_is_indoor_portid = 0;
2362 }
Ilan Peer52616f22014-02-25 16:26:00 +02002363
Ilan peer05050752015-03-04 00:32:06 -05002364 spin_unlock(&reg_indoor_lock);
2365
2366 if (!is_indoor)
2367 reg_check_channels();
Ilan Peer52616f22014-02-25 16:26:00 +02002368
2369 return 0;
2370}
2371
Ilan peer05050752015-03-04 00:32:06 -05002372void regulatory_netlink_notify(u32 portid)
2373{
2374 spin_lock(&reg_indoor_lock);
2375
2376 if (reg_is_indoor_portid != portid) {
2377 spin_unlock(&reg_indoor_lock);
2378 return;
2379 }
2380
2381 reg_is_indoor = false;
2382 reg_is_indoor_portid = 0;
2383
2384 spin_unlock(&reg_indoor_lock);
2385
2386 reg_check_channels();
2387}
2388
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002389/* Driver hints */
2390int regulatory_hint(struct wiphy *wiphy, const char *alpha2)
2391{
2392 struct regulatory_request *request;
2393
Johannes Bergfdc9d7b2012-12-03 18:36:09 +01002394 if (WARN_ON(!alpha2 || !wiphy))
2395 return -EINVAL;
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002396
Luis R. Rodriguez4f7b9142013-12-14 20:09:06 +01002397 wiphy->regulatory_flags &= ~REGULATORY_CUSTOM_REG;
2398
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002399 request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL);
2400 if (!request)
2401 return -ENOMEM;
2402
2403 request->wiphy_idx = get_wiphy_idx(wiphy);
2404
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002405 request->alpha2[0] = alpha2[0];
2406 request->alpha2[1] = alpha2[1];
Luis R. Rodriguez7db90f42009-03-09 22:07:41 -04002407 request->initiator = NL80211_REGDOM_SET_BY_DRIVER;
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002408
Ilan peerc37722b2015-03-30 15:15:49 +03002409 /* Allow calling CRDA again */
Johannes Bergb6863032015-10-15 09:25:18 +02002410 reset_crda_timeouts();
Ilan peerc37722b2015-03-30 15:15:49 +03002411
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002412 queue_regulatory_request(request);
2413
2414 return 0;
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002415}
2416EXPORT_SYMBOL(regulatory_hint);
2417
Johannes Berg57fbcce2016-04-12 15:56:15 +02002418void regulatory_hint_country_ie(struct wiphy *wiphy, enum nl80211_band band,
Luis R. Rodriguez789fd032013-10-04 18:07:24 -07002419 const u8 *country_ie, u8 country_ie_len)
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -08002420{
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -08002421 char alpha2[2];
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -08002422 enum environment_cap env = ENVIRON_ANY;
Johannes Bergdb2424c2013-05-10 19:07:52 +02002423 struct regulatory_request *request = NULL, *lr;
Luis R. Rodriguezd335fe62009-02-21 00:04:27 -05002424
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -08002425 /* IE len must be evenly divisible by 2 */
2426 if (country_ie_len & 0x01)
Johannes Bergdb2424c2013-05-10 19:07:52 +02002427 return;
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -08002428
2429 if (country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
Johannes Bergdb2424c2013-05-10 19:07:52 +02002430 return;
2431
2432 request = kzalloc(sizeof(*request), GFP_KERNEL);
2433 if (!request)
2434 return;
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -08002435
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -08002436 alpha2[0] = country_ie[0];
2437 alpha2[1] = country_ie[1];
2438
2439 if (country_ie[2] == 'I')
2440 env = ENVIRON_INDOOR;
2441 else if (country_ie[2] == 'O')
2442 env = ENVIRON_OUTDOOR;
2443
Johannes Bergdb2424c2013-05-10 19:07:52 +02002444 rcu_read_lock();
2445 lr = get_last_request();
2446
2447 if (unlikely(!lr))
2448 goto out;
2449
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -05002450 /*
Luis R. Rodriguez8b19e6c2009-07-30 17:38:09 -07002451 * We will run this only upon a successful connection on cfg80211.
Luis R. Rodriguez4b44c8b2009-07-30 17:38:07 -07002452 * We leave conflict resolution to the workqueue, where can hold
Johannes Berg5fe231e2013-05-08 21:45:15 +02002453 * the RTNL.
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -05002454 */
Johannes Bergc492db32012-12-06 16:29:25 +01002455 if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE &&
2456 lr->wiphy_idx != WIPHY_IDX_INVALID)
Luis R. Rodriguez4b44c8b2009-07-30 17:38:07 -07002457 goto out;
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -08002458
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002459 request->wiphy_idx = get_wiphy_idx(wiphy);
John W. Linville4f366c52010-07-15 14:57:33 -04002460 request->alpha2[0] = alpha2[0];
2461 request->alpha2[1] = alpha2[1];
Luis R. Rodriguez7db90f42009-03-09 22:07:41 -04002462 request->initiator = NL80211_REGDOM_SET_BY_COUNTRY_IE;
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002463 request->country_ie_env = env;
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -08002464
Ilan peerc37722b2015-03-30 15:15:49 +03002465 /* Allow calling CRDA again */
Johannes Bergb6863032015-10-15 09:25:18 +02002466 reset_crda_timeouts();
Ilan peerc37722b2015-03-30 15:15:49 +03002467
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002468 queue_regulatory_request(request);
Johannes Bergdb2424c2013-05-10 19:07:52 +02002469 request = NULL;
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -08002470out:
Johannes Bergdb2424c2013-05-10 19:07:52 +02002471 kfree(request);
2472 rcu_read_unlock();
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -08002473}
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002474
Luis R. Rodriguez09d989d2010-01-29 19:58:57 -05002475static void restore_alpha2(char *alpha2, bool reset_user)
2476{
2477 /* indicates there is no alpha2 to consider for restoration */
2478 alpha2[0] = '9';
2479 alpha2[1] = '7';
2480
2481 /* The user setting has precedence over the module parameter */
2482 if (is_user_regdom_saved()) {
2483 /* Unless we're asked to ignore it and reset it */
2484 if (reset_user) {
Johannes Bergc799ba62015-12-11 15:31:10 +01002485 pr_debug("Restoring regulatory settings including user preference\n");
Luis R. Rodriguez09d989d2010-01-29 19:58:57 -05002486 user_alpha2[0] = '9';
2487 user_alpha2[1] = '7';
2488
2489 /*
2490 * If we're ignoring user settings, we still need to
2491 * check the module parameter to ensure we put things
2492 * back as they were for a full restore.
2493 */
2494 if (!is_world_regdom(ieee80211_regdom)) {
Johannes Bergc799ba62015-12-11 15:31:10 +01002495 pr_debug("Keeping preference on module parameter ieee80211_regdom: %c%c\n",
2496 ieee80211_regdom[0], ieee80211_regdom[1]);
Luis R. Rodriguez09d989d2010-01-29 19:58:57 -05002497 alpha2[0] = ieee80211_regdom[0];
2498 alpha2[1] = ieee80211_regdom[1];
2499 }
2500 } else {
Johannes Bergc799ba62015-12-11 15:31:10 +01002501 pr_debug("Restoring regulatory settings while preserving user preference for: %c%c\n",
2502 user_alpha2[0], user_alpha2[1]);
Luis R. Rodriguez09d989d2010-01-29 19:58:57 -05002503 alpha2[0] = user_alpha2[0];
2504 alpha2[1] = user_alpha2[1];
2505 }
2506 } else if (!is_world_regdom(ieee80211_regdom)) {
Johannes Bergc799ba62015-12-11 15:31:10 +01002507 pr_debug("Keeping preference on module parameter ieee80211_regdom: %c%c\n",
2508 ieee80211_regdom[0], ieee80211_regdom[1]);
Luis R. Rodriguez09d989d2010-01-29 19:58:57 -05002509 alpha2[0] = ieee80211_regdom[0];
2510 alpha2[1] = ieee80211_regdom[1];
2511 } else
Johannes Bergc799ba62015-12-11 15:31:10 +01002512 pr_debug("Restoring regulatory settings\n");
Luis R. Rodriguez09d989d2010-01-29 19:58:57 -05002513}
2514
Rajkumar Manoharan5ce543d2011-12-07 21:50:08 +05302515static void restore_custom_reg_settings(struct wiphy *wiphy)
2516{
2517 struct ieee80211_supported_band *sband;
Johannes Berg57fbcce2016-04-12 15:56:15 +02002518 enum nl80211_band band;
Rajkumar Manoharan5ce543d2011-12-07 21:50:08 +05302519 struct ieee80211_channel *chan;
2520 int i;
2521
Johannes Berg57fbcce2016-04-12 15:56:15 +02002522 for (band = 0; band < NUM_NL80211_BANDS; band++) {
Rajkumar Manoharan5ce543d2011-12-07 21:50:08 +05302523 sband = wiphy->bands[band];
2524 if (!sband)
2525 continue;
2526 for (i = 0; i < sband->n_channels; i++) {
2527 chan = &sband->channels[i];
2528 chan->flags = chan->orig_flags;
2529 chan->max_antenna_gain = chan->orig_mag;
2530 chan->max_power = chan->orig_mpwr;
Paul Stewart899852a2012-08-01 16:54:42 -07002531 chan->beacon_found = false;
Rajkumar Manoharan5ce543d2011-12-07 21:50:08 +05302532 }
2533 }
2534}
2535
Luis R. Rodriguez09d989d2010-01-29 19:58:57 -05002536/*
2537 * Restoring regulatory settings involves ingoring any
2538 * possibly stale country IE information and user regulatory
2539 * settings if so desired, this includes any beacon hints
2540 * learned as we could have traveled outside to another country
2541 * after disconnection. To restore regulatory settings we do
2542 * exactly what we did at bootup:
2543 *
2544 * - send a core regulatory hint
2545 * - send a user regulatory hint if applicable
2546 *
2547 * Device drivers that send a regulatory hint for a specific country
2548 * keep their own regulatory domain on wiphy->regd so that does does
2549 * not need to be remembered.
2550 */
2551static void restore_regulatory_settings(bool reset_user)
2552{
2553 char alpha2[2];
Dmitry Shmidtcee0bec2011-12-19 12:32:21 -08002554 char world_alpha2[2];
Luis R. Rodriguez09d989d2010-01-29 19:58:57 -05002555 struct reg_beacon *reg_beacon, *btmp;
Luis R. Rodriguez14609552011-04-05 10:49:03 -07002556 LIST_HEAD(tmp_reg_req_list);
Rajkumar Manoharan5ce543d2011-12-07 21:50:08 +05302557 struct cfg80211_registered_device *rdev;
Luis R. Rodriguez09d989d2010-01-29 19:58:57 -05002558
Johannes Berg5fe231e2013-05-08 21:45:15 +02002559 ASSERT_RTNL();
2560
Ilan peer05050752015-03-04 00:32:06 -05002561 /*
2562 * Clear the indoor setting in case that it is not controlled by user
2563 * space, as otherwise there is no guarantee that the device is still
2564 * operating in an indoor environment.
2565 */
2566 spin_lock(&reg_indoor_lock);
2567 if (reg_is_indoor && !reg_is_indoor_portid) {
2568 reg_is_indoor = false;
2569 reg_check_channels();
2570 }
2571 spin_unlock(&reg_indoor_lock);
Ilan Peer52616f22014-02-25 16:26:00 +02002572
Johannes Berg2d319862013-01-09 12:01:38 +01002573 reset_regdomains(true, &world_regdom);
Luis R. Rodriguez09d989d2010-01-29 19:58:57 -05002574 restore_alpha2(alpha2, reset_user);
2575
Luis R. Rodriguez14609552011-04-05 10:49:03 -07002576 /*
2577 * If there's any pending requests we simply
2578 * stash them to a temporary pending queue and
2579 * add then after we've restored regulatory
2580 * settings.
2581 */
2582 spin_lock(&reg_requests_lock);
Ilan peereeca9fc2015-03-04 00:32:07 -05002583 list_splice_tail_init(&reg_requests_list, &tmp_reg_req_list);
Luis R. Rodriguez14609552011-04-05 10:49:03 -07002584 spin_unlock(&reg_requests_lock);
2585
Luis R. Rodriguez09d989d2010-01-29 19:58:57 -05002586 /* Clear beacon hints */
2587 spin_lock_bh(&reg_pending_beacons_lock);
Johannes Bergfea9bce2012-12-03 17:32:01 +01002588 list_for_each_entry_safe(reg_beacon, btmp, &reg_pending_beacons, list) {
2589 list_del(&reg_beacon->list);
2590 kfree(reg_beacon);
Luis R. Rodriguez09d989d2010-01-29 19:58:57 -05002591 }
2592 spin_unlock_bh(&reg_pending_beacons_lock);
2593
Johannes Bergfea9bce2012-12-03 17:32:01 +01002594 list_for_each_entry_safe(reg_beacon, btmp, &reg_beacon_list, list) {
2595 list_del(&reg_beacon->list);
2596 kfree(reg_beacon);
Luis R. Rodriguez09d989d2010-01-29 19:58:57 -05002597 }
2598
2599 /* First restore to the basic regulatory settings */
Johannes Berg379b82f2012-12-06 15:44:07 +01002600 world_alpha2[0] = cfg80211_world_regdom->alpha2[0];
2601 world_alpha2[1] = cfg80211_world_regdom->alpha2[1];
Luis R. Rodriguez09d989d2010-01-29 19:58:57 -05002602
Rajkumar Manoharan5ce543d2011-12-07 21:50:08 +05302603 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
Jonathan Doronb0d7aa52014-12-15 19:26:00 +02002604 if (rdev->wiphy.regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED)
2605 continue;
Luis R. Rodrigueza2f73b62013-11-11 22:15:29 +01002606 if (rdev->wiphy.regulatory_flags & REGULATORY_CUSTOM_REG)
Rajkumar Manoharan5ce543d2011-12-07 21:50:08 +05302607 restore_custom_reg_settings(&rdev->wiphy);
2608 }
2609
Dmitry Shmidtcee0bec2011-12-19 12:32:21 -08002610 regulatory_hint_core(world_alpha2);
Luis R. Rodriguez09d989d2010-01-29 19:58:57 -05002611
2612 /*
2613 * This restores the ieee80211_regdom module parameter
2614 * preference or the last user requested regulatory
2615 * settings, user regulatory settings takes precedence.
2616 */
2617 if (is_an_alpha2(alpha2))
Maciej S. Szmigiero549cc1c2015-09-02 19:00:31 +02002618 regulatory_hint_user(alpha2, NL80211_USER_REG_HINT_USER);
Luis R. Rodriguez09d989d2010-01-29 19:58:57 -05002619
Luis R. Rodriguez14609552011-04-05 10:49:03 -07002620 spin_lock(&reg_requests_lock);
Johannes Berg11cff962012-12-03 18:56:41 +01002621 list_splice_tail_init(&tmp_reg_req_list, &reg_requests_list);
Luis R. Rodriguez14609552011-04-05 10:49:03 -07002622 spin_unlock(&reg_requests_lock);
2623
Johannes Bergc799ba62015-12-11 15:31:10 +01002624 pr_debug("Kicking the queue\n");
Luis R. Rodriguez14609552011-04-05 10:49:03 -07002625
2626 schedule_work(&reg_work);
2627}
Luis R. Rodriguez09d989d2010-01-29 19:58:57 -05002628
2629void regulatory_hint_disconnect(void)
2630{
Johannes Bergc799ba62015-12-11 15:31:10 +01002631 pr_debug("All devices are disconnected, going to restore regulatory settings\n");
Luis R. Rodriguez09d989d2010-01-29 19:58:57 -05002632 restore_regulatory_settings(false);
2633}
2634
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05002635static bool freq_is_chan_12_13_14(u16 freq)
2636{
Johannes Berg57fbcce2016-04-12 15:56:15 +02002637 if (freq == ieee80211_channel_to_frequency(12, NL80211_BAND_2GHZ) ||
2638 freq == ieee80211_channel_to_frequency(13, NL80211_BAND_2GHZ) ||
2639 freq == ieee80211_channel_to_frequency(14, NL80211_BAND_2GHZ))
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05002640 return true;
2641 return false;
2642}
2643
Luis R. Rodriguez3ebfa6e2012-12-19 10:53:02 -08002644static bool pending_reg_beacon(struct ieee80211_channel *beacon_chan)
2645{
2646 struct reg_beacon *pending_beacon;
2647
2648 list_for_each_entry(pending_beacon, &reg_pending_beacons, list)
2649 if (beacon_chan->center_freq ==
2650 pending_beacon->chan.center_freq)
2651 return true;
2652 return false;
2653}
2654
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05002655int regulatory_hint_found_beacon(struct wiphy *wiphy,
2656 struct ieee80211_channel *beacon_chan,
2657 gfp_t gfp)
2658{
2659 struct reg_beacon *reg_beacon;
Luis R. Rodriguez3ebfa6e2012-12-19 10:53:02 -08002660 bool processing;
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05002661
Johannes Berg1a919312012-12-03 17:21:11 +01002662 if (beacon_chan->beacon_found ||
2663 beacon_chan->flags & IEEE80211_CHAN_RADAR ||
Johannes Berg57fbcce2016-04-12 15:56:15 +02002664 (beacon_chan->band == NL80211_BAND_2GHZ &&
Johannes Berg1a919312012-12-03 17:21:11 +01002665 !freq_is_chan_12_13_14(beacon_chan->center_freq)))
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05002666 return 0;
2667
Luis R. Rodriguez3ebfa6e2012-12-19 10:53:02 -08002668 spin_lock_bh(&reg_pending_beacons_lock);
2669 processing = pending_reg_beacon(beacon_chan);
2670 spin_unlock_bh(&reg_pending_beacons_lock);
2671
2672 if (processing)
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05002673 return 0;
2674
2675 reg_beacon = kzalloc(sizeof(struct reg_beacon), gfp);
2676 if (!reg_beacon)
2677 return -ENOMEM;
2678
Johannes Bergc799ba62015-12-11 15:31:10 +01002679 pr_debug("Found new beacon on frequency: %d MHz (Ch %d) on %s\n",
2680 beacon_chan->center_freq,
2681 ieee80211_frequency_to_channel(beacon_chan->center_freq),
2682 wiphy_name(wiphy));
Luis R. Rodriguez4113f752010-01-04 11:50:11 -05002683
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05002684 memcpy(&reg_beacon->chan, beacon_chan,
Johannes Berg1a919312012-12-03 17:21:11 +01002685 sizeof(struct ieee80211_channel));
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05002686
2687 /*
2688 * Since we can be called from BH or and non-BH context
2689 * we must use spin_lock_bh()
2690 */
2691 spin_lock_bh(&reg_pending_beacons_lock);
2692 list_add_tail(&reg_beacon->list, &reg_pending_beacons);
2693 spin_unlock_bh(&reg_pending_beacons_lock);
2694
2695 schedule_work(&reg_work);
2696
2697 return 0;
2698}
2699
Johannes Berga3d2eaf2008-09-15 11:10:52 +02002700static void print_rd_rules(const struct ieee80211_regdomain *rd)
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002701{
2702 unsigned int i;
Johannes Berga3d2eaf2008-09-15 11:10:52 +02002703 const struct ieee80211_reg_rule *reg_rule = NULL;
2704 const struct ieee80211_freq_range *freq_range = NULL;
2705 const struct ieee80211_power_rule *power_rule = NULL;
Janusz Dziedzic089027e2014-02-21 19:46:12 +01002706 char bw[32], cac_time[32];
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002707
Dave Young94c4fd62015-11-15 15:31:05 +08002708 pr_debug(" (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp), (dfs_cac_time)\n");
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002709
2710 for (i = 0; i < rd->n_reg_rules; i++) {
2711 reg_rule = &rd->reg_rules[i];
2712 freq_range = &reg_rule->freq_range;
2713 power_rule = &reg_rule->power_rule;
2714
Janusz Dziedzicb0dfd2e2014-02-20 13:52:16 +01002715 if (reg_rule->flags & NL80211_RRF_AUTO_BW)
2716 snprintf(bw, sizeof(bw), "%d KHz, %d KHz AUTO",
2717 freq_range->max_bandwidth_khz,
Janusz Dziedzic97524822014-01-30 09:52:20 +01002718 reg_get_max_bandwidth(rd, reg_rule));
2719 else
Janusz Dziedzicb0dfd2e2014-02-20 13:52:16 +01002720 snprintf(bw, sizeof(bw), "%d KHz",
Janusz Dziedzic97524822014-01-30 09:52:20 +01002721 freq_range->max_bandwidth_khz);
2722
Janusz Dziedzic089027e2014-02-21 19:46:12 +01002723 if (reg_rule->flags & NL80211_RRF_DFS)
2724 scnprintf(cac_time, sizeof(cac_time), "%u s",
2725 reg_rule->dfs_cac_ms/1000);
2726 else
2727 scnprintf(cac_time, sizeof(cac_time), "N/A");
2728
2729
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -05002730 /*
2731 * There may not be documentation for max antenna gain
2732 * in certain regions
2733 */
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002734 if (power_rule->max_antenna_gain)
Dave Young94c4fd62015-11-15 15:31:05 +08002735 pr_debug(" (%d KHz - %d KHz @ %s), (%d mBi, %d mBm), (%s)\n",
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002736 freq_range->start_freq_khz,
2737 freq_range->end_freq_khz,
Janusz Dziedzic97524822014-01-30 09:52:20 +01002738 bw,
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002739 power_rule->max_antenna_gain,
Janusz Dziedzic089027e2014-02-21 19:46:12 +01002740 power_rule->max_eirp,
2741 cac_time);
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002742 else
Dave Young94c4fd62015-11-15 15:31:05 +08002743 pr_debug(" (%d KHz - %d KHz @ %s), (N/A, %d mBm), (%s)\n",
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002744 freq_range->start_freq_khz,
2745 freq_range->end_freq_khz,
Janusz Dziedzic97524822014-01-30 09:52:20 +01002746 bw,
Janusz Dziedzic089027e2014-02-21 19:46:12 +01002747 power_rule->max_eirp,
2748 cac_time);
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002749 }
2750}
2751
Luis R. Rodriguez4c7d3982013-11-13 18:54:02 +01002752bool reg_supported_dfs_region(enum nl80211_dfs_regions dfs_region)
Luis R. Rodriguez8b60b072011-10-11 10:59:02 -07002753{
2754 switch (dfs_region) {
2755 case NL80211_DFS_UNSET:
2756 case NL80211_DFS_FCC:
2757 case NL80211_DFS_ETSI:
2758 case NL80211_DFS_JP:
2759 return true;
2760 default:
Johannes Bergc799ba62015-12-11 15:31:10 +01002761 pr_debug("Ignoring uknown DFS master region: %d\n", dfs_region);
Luis R. Rodriguez8b60b072011-10-11 10:59:02 -07002762 return false;
2763 }
2764}
2765
Johannes Berga3d2eaf2008-09-15 11:10:52 +02002766static void print_regdomain(const struct ieee80211_regdomain *rd)
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002767{
Johannes Bergc492db32012-12-06 16:29:25 +01002768 struct regulatory_request *lr = get_last_request();
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002769
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -08002770 if (is_intersected_alpha2(rd->alpha2)) {
Johannes Bergc492db32012-12-06 16:29:25 +01002771 if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) {
Johannes Berg79c97e92009-07-07 03:56:12 +02002772 struct cfg80211_registered_device *rdev;
Johannes Bergc492db32012-12-06 16:29:25 +01002773 rdev = cfg80211_rdev_by_wiphy_idx(lr->wiphy_idx);
Johannes Berg79c97e92009-07-07 03:56:12 +02002774 if (rdev) {
Dave Young94c4fd62015-11-15 15:31:05 +08002775 pr_debug("Current regulatory domain updated by AP to: %c%c\n",
Johannes Berg79c97e92009-07-07 03:56:12 +02002776 rdev->country_ie_alpha2[0],
2777 rdev->country_ie_alpha2[1]);
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -08002778 } else
Dave Young94c4fd62015-11-15 15:31:05 +08002779 pr_debug("Current regulatory domain intersected:\n");
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -08002780 } else
Dave Young94c4fd62015-11-15 15:31:05 +08002781 pr_debug("Current regulatory domain intersected:\n");
Johannes Berg1a919312012-12-03 17:21:11 +01002782 } else if (is_world_regdom(rd->alpha2)) {
Dave Young94c4fd62015-11-15 15:31:05 +08002783 pr_debug("World regulatory domain updated:\n");
Johannes Berg1a919312012-12-03 17:21:11 +01002784 } else {
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002785 if (is_unknown_alpha2(rd->alpha2))
Dave Young94c4fd62015-11-15 15:31:05 +08002786 pr_debug("Regulatory domain changed to driver built-in settings (unknown country)\n");
Luis R. Rodriguez57b5ce02012-07-12 11:49:18 -07002787 else {
Johannes Bergc492db32012-12-06 16:29:25 +01002788 if (reg_request_cell_base(lr))
Dave Young94c4fd62015-11-15 15:31:05 +08002789 pr_debug("Regulatory domain changed to country: %c%c by Cell Station\n",
Luis R. Rodriguez57b5ce02012-07-12 11:49:18 -07002790 rd->alpha2[0], rd->alpha2[1]);
2791 else
Dave Young94c4fd62015-11-15 15:31:05 +08002792 pr_debug("Regulatory domain changed to country: %c%c\n",
Luis R. Rodriguez57b5ce02012-07-12 11:49:18 -07002793 rd->alpha2[0], rd->alpha2[1]);
2794 }
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002795 }
Johannes Berg1a919312012-12-03 17:21:11 +01002796
Dave Young94c4fd62015-11-15 15:31:05 +08002797 pr_debug(" DFS Master region: %s", reg_dfs_region_str(rd->dfs_region));
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002798 print_rd_rules(rd);
2799}
2800
Johannes Berg2df78162008-10-28 16:49:41 +01002801static void print_regdomain_info(const struct ieee80211_regdomain *rd)
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002802{
Dave Young94c4fd62015-11-15 15:31:05 +08002803 pr_debug("Regulatory domain: %c%c\n", rd->alpha2[0], rd->alpha2[1]);
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002804 print_rd_rules(rd);
2805}
2806
Luis R. Rodriguez3b9e5ac2013-11-05 09:18:14 -08002807static int reg_set_rd_core(const struct ieee80211_regdomain *rd)
2808{
2809 if (!is_world_regdom(rd->alpha2))
2810 return -EINVAL;
2811 update_world_regdomain(rd);
2812 return 0;
2813}
2814
Luis R. Rodriguez84721d42013-11-05 09:18:15 -08002815static int reg_set_rd_user(const struct ieee80211_regdomain *rd,
2816 struct regulatory_request *user_request)
2817{
2818 const struct ieee80211_regdomain *intersected_rd = NULL;
2819
Luis R. Rodriguez84721d42013-11-05 09:18:15 -08002820 if (!regdom_changes(rd->alpha2))
2821 return -EALREADY;
2822
2823 if (!is_valid_rd(rd)) {
Dave Young94c4fd62015-11-15 15:31:05 +08002824 pr_err("Invalid regulatory domain detected: %c%c\n",
2825 rd->alpha2[0], rd->alpha2[1]);
Luis R. Rodriguez84721d42013-11-05 09:18:15 -08002826 print_regdomain_info(rd);
2827 return -EINVAL;
2828 }
2829
2830 if (!user_request->intersect) {
2831 reset_regdomains(false, rd);
2832 return 0;
2833 }
2834
2835 intersected_rd = regdom_intersect(rd, get_cfg80211_regdom());
2836 if (!intersected_rd)
2837 return -EINVAL;
2838
2839 kfree(rd);
2840 rd = NULL;
2841 reset_regdomains(false, intersected_rd);
2842
2843 return 0;
2844}
2845
Luis R. Rodriguezf5fe3242013-11-05 09:18:16 -08002846static int reg_set_rd_driver(const struct ieee80211_regdomain *rd,
2847 struct regulatory_request *driver_request)
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002848{
Johannes Berge9763c32012-12-03 16:59:46 +01002849 const struct ieee80211_regdomain *regd;
Luis R. Rodriguez9c964772008-10-30 13:33:53 -07002850 const struct ieee80211_regdomain *intersected_rd = NULL;
Luis R. Rodriguezf5fe3242013-11-05 09:18:16 -08002851 const struct ieee80211_regdomain *tmp;
Luis R. Rodriguez806a9e32009-02-21 00:04:26 -05002852 struct wiphy *request_wiphy;
Johannes Berg6913b492012-12-04 00:48:59 +01002853
Luis R. Rodriguezf5fe3242013-11-05 09:18:16 -08002854 if (is_world_regdom(rd->alpha2))
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002855 return -EINVAL;
2856
Luis R. Rodriguezf5fe3242013-11-05 09:18:16 -08002857 if (!regdom_changes(rd->alpha2))
2858 return -EALREADY;
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002859
Luis R. Rodriguez8375af32008-11-12 14:21:57 -08002860 if (!is_valid_rd(rd)) {
Dave Young94c4fd62015-11-15 15:31:05 +08002861 pr_err("Invalid regulatory domain detected: %c%c\n",
2862 rd->alpha2[0], rd->alpha2[1]);
Luis R. Rodriguez8375af32008-11-12 14:21:57 -08002863 print_regdomain_info(rd);
2864 return -EINVAL;
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002865 }
2866
Luis R. Rodriguezf5fe3242013-11-05 09:18:16 -08002867 request_wiphy = wiphy_idx_to_wiphy(driver_request->wiphy_idx);
Johannes Berg922ec582015-10-15 09:12:49 +02002868 if (!request_wiphy)
Johannes Bergde3584b2011-11-21 10:44:00 +01002869 return -ENODEV;
Luis R. Rodriguez806a9e32009-02-21 00:04:26 -05002870
Luis R. Rodriguezf5fe3242013-11-05 09:18:16 -08002871 if (!driver_request->intersect) {
Luis R. Rodriguez558f6d32009-06-08 18:54:37 -07002872 if (request_wiphy->regd)
2873 return -EALREADY;
Luis R. Rodriguez3e0c3ff2009-01-07 17:43:34 -08002874
Johannes Berge9763c32012-12-03 16:59:46 +01002875 regd = reg_copy_regd(rd);
2876 if (IS_ERR(regd))
2877 return PTR_ERR(regd);
Luis R. Rodriguez3e0c3ff2009-01-07 17:43:34 -08002878
Johannes Berg458f4f92012-12-06 15:47:38 +01002879 rcu_assign_pointer(request_wiphy->regd, regd);
Johannes Berg379b82f2012-12-06 15:44:07 +01002880 reset_regdomains(false, rd);
Luis R. Rodriguezb8295ac2008-11-12 14:21:58 -08002881 return 0;
2882 }
2883
Luis R. Rodriguezf5fe3242013-11-05 09:18:16 -08002884 intersected_rd = regdom_intersect(rd, get_cfg80211_regdom());
2885 if (!intersected_rd)
2886 return -EINVAL;
Luis R. Rodriguezb8295ac2008-11-12 14:21:58 -08002887
Luis R. Rodriguezf5fe3242013-11-05 09:18:16 -08002888 /*
2889 * We can trash what CRDA provided now.
2890 * However if a driver requested this specific regulatory
2891 * domain we keep it for its private use
2892 */
2893 tmp = get_wiphy_regdom(request_wiphy);
2894 rcu_assign_pointer(request_wiphy->regd, rd);
2895 rcu_free_regdom(tmp);
Luis R. Rodriguezb8295ac2008-11-12 14:21:58 -08002896
Luis R. Rodriguezf5fe3242013-11-05 09:18:16 -08002897 rd = NULL;
Larry Fingerb7566fc2013-02-04 15:33:44 -06002898
Luis R. Rodriguezf5fe3242013-11-05 09:18:16 -08002899 reset_regdomains(false, intersected_rd);
Luis R. Rodriguez3e0c3ff2009-01-07 17:43:34 -08002900
Luis R. Rodriguezf5fe3242013-11-05 09:18:16 -08002901 return 0;
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002902}
2903
Luis R. Rodriguez01992402013-11-05 09:18:17 -08002904static int reg_set_rd_country_ie(const struct ieee80211_regdomain *rd,
2905 struct regulatory_request *country_ie_request)
Luis R. Rodriguezf5fe3242013-11-05 09:18:16 -08002906{
2907 struct wiphy *request_wiphy;
2908
2909 if (!is_alpha2_set(rd->alpha2) && !is_an_alpha2(rd->alpha2) &&
2910 !is_unknown_alpha2(rd->alpha2))
2911 return -EINVAL;
2912
2913 /*
2914 * Lets only bother proceeding on the same alpha2 if the current
2915 * rd is non static (it means CRDA was present and was used last)
2916 * and the pending request came in from a country IE
2917 */
2918
2919 if (!is_valid_rd(rd)) {
Dave Young94c4fd62015-11-15 15:31:05 +08002920 pr_err("Invalid regulatory domain detected: %c%c\n",
2921 rd->alpha2[0], rd->alpha2[1]);
Luis R. Rodriguezf5fe3242013-11-05 09:18:16 -08002922 print_regdomain_info(rd);
2923 return -EINVAL;
2924 }
2925
Luis R. Rodriguez01992402013-11-05 09:18:17 -08002926 request_wiphy = wiphy_idx_to_wiphy(country_ie_request->wiphy_idx);
Johannes Berg922ec582015-10-15 09:12:49 +02002927 if (!request_wiphy)
Luis R. Rodriguezf5fe3242013-11-05 09:18:16 -08002928 return -ENODEV;
Luis R. Rodriguezf5fe3242013-11-05 09:18:16 -08002929
Luis R. Rodriguez01992402013-11-05 09:18:17 -08002930 if (country_ie_request->intersect)
Luis R. Rodriguezf5fe3242013-11-05 09:18:16 -08002931 return -EINVAL;
2932
2933 reset_regdomains(false, rd);
2934 return 0;
2935}
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002936
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -05002937/*
2938 * Use this call to set the current regulatory domain. Conflicts with
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002939 * multiple drivers can be ironed out later. Caller must've already
Johannes Berg458f4f92012-12-06 15:47:38 +01002940 * kmalloc'd the rd structure.
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -05002941 */
Ilan peerc37722b2015-03-30 15:15:49 +03002942int set_regdom(const struct ieee80211_regdomain *rd,
2943 enum ieee80211_regd_source regd_src)
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002944{
Johannes Bergc492db32012-12-06 16:29:25 +01002945 struct regulatory_request *lr;
Janusz Dziedzic092008a2014-02-14 08:54:00 +01002946 bool user_reset = false;
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002947 int r;
2948
Luis R. Rodriguez3b9e5ac2013-11-05 09:18:14 -08002949 if (!reg_is_valid_request(rd->alpha2)) {
2950 kfree(rd);
2951 return -EINVAL;
2952 }
2953
Ilan peerc37722b2015-03-30 15:15:49 +03002954 if (regd_src == REGD_SOURCE_CRDA)
Johannes Bergb6863032015-10-15 09:25:18 +02002955 reset_crda_timeouts();
Ilan peerc37722b2015-03-30 15:15:49 +03002956
Johannes Bergc492db32012-12-06 16:29:25 +01002957 lr = get_last_request();
Luis R. Rodriguezabc73812009-07-30 17:38:08 -07002958
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002959 /* Note that this doesn't update the wiphys, this is done below */
Luis R. Rodriguez3b9e5ac2013-11-05 09:18:14 -08002960 switch (lr->initiator) {
2961 case NL80211_REGDOM_SET_BY_CORE:
2962 r = reg_set_rd_core(rd);
2963 break;
2964 case NL80211_REGDOM_SET_BY_USER:
Luis R. Rodriguez84721d42013-11-05 09:18:15 -08002965 r = reg_set_rd_user(rd, lr);
Janusz Dziedzic092008a2014-02-14 08:54:00 +01002966 user_reset = true;
Luis R. Rodriguez84721d42013-11-05 09:18:15 -08002967 break;
Luis R. Rodriguez3b9e5ac2013-11-05 09:18:14 -08002968 case NL80211_REGDOM_SET_BY_DRIVER:
Luis R. Rodriguezf5fe3242013-11-05 09:18:16 -08002969 r = reg_set_rd_driver(rd, lr);
2970 break;
Luis R. Rodriguez3b9e5ac2013-11-05 09:18:14 -08002971 case NL80211_REGDOM_SET_BY_COUNTRY_IE:
Luis R. Rodriguez01992402013-11-05 09:18:17 -08002972 r = reg_set_rd_country_ie(rd, lr);
Luis R. Rodriguez3b9e5ac2013-11-05 09:18:14 -08002973 break;
2974 default:
2975 WARN(1, "invalid initiator %d\n", lr->initiator);
Ola Olsson09d11802015-12-13 19:12:03 +01002976 kfree(rd);
Luis R. Rodriguez3b9e5ac2013-11-05 09:18:14 -08002977 return -EINVAL;
2978 }
2979
Johannes Bergd2372b32008-10-24 20:32:20 +02002980 if (r) {
Janusz Dziedzic092008a2014-02-14 08:54:00 +01002981 switch (r) {
2982 case -EALREADY:
Kalle Valo95908532012-07-12 15:33:58 +03002983 reg_set_request_processed();
Janusz Dziedzic092008a2014-02-14 08:54:00 +01002984 break;
2985 default:
2986 /* Back to world regulatory in case of errors */
2987 restore_regulatory_settings(user_reset);
2988 }
Kalle Valo95908532012-07-12 15:33:58 +03002989
Johannes Bergd2372b32008-10-24 20:32:20 +02002990 kfree(rd);
Johannes Berg38fd2142013-05-10 19:17:17 +02002991 return r;
Johannes Bergd2372b32008-10-24 20:32:20 +02002992 }
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002993
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002994 /* This would make this whole thing pointless */
Johannes Berg38fd2142013-05-10 19:17:17 +02002995 if (WARN_ON(!lr->intersect && rd != get_cfg80211_regdom()))
2996 return -EINVAL;
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002997
2998 /* update all wiphys now with the new established regulatory domain */
Johannes Bergc492db32012-12-06 16:29:25 +01002999 update_all_wiphy_regulatory(lr->initiator);
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07003000
Johannes Berg458f4f92012-12-06 15:47:38 +01003001 print_regdomain(get_cfg80211_regdom());
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07003002
Johannes Bergc492db32012-12-06 16:29:25 +01003003 nl80211_send_reg_change_event(lr);
Luis R. Rodriguez73d54c92009-03-09 22:07:42 -04003004
Luis R. Rodriguezb2e253c2010-11-17 21:46:09 -08003005 reg_set_request_processed();
3006
Johannes Berg38fd2142013-05-10 19:17:17 +02003007 return 0;
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07003008}
3009
Arik Nemtsov2c3e8612015-01-07 16:47:19 +02003010static int __regulatory_set_wiphy_regd(struct wiphy *wiphy,
3011 struct ieee80211_regdomain *rd)
Jonathan Doronb0d7aa52014-12-15 19:26:00 +02003012{
3013 const struct ieee80211_regdomain *regd;
3014 const struct ieee80211_regdomain *prev_regd;
3015 struct cfg80211_registered_device *rdev;
3016
3017 if (WARN_ON(!wiphy || !rd))
3018 return -EINVAL;
3019
3020 if (WARN(!(wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED),
3021 "wiphy should have REGULATORY_WIPHY_SELF_MANAGED\n"))
3022 return -EPERM;
3023
3024 if (WARN(!is_valid_rd(rd), "Invalid regulatory domain detected\n")) {
3025 print_regdomain_info(rd);
3026 return -EINVAL;
3027 }
3028
3029 regd = reg_copy_regd(rd);
3030 if (IS_ERR(regd))
3031 return PTR_ERR(regd);
3032
3033 rdev = wiphy_to_rdev(wiphy);
3034
3035 spin_lock(&reg_requests_lock);
3036 prev_regd = rdev->requested_regd;
3037 rdev->requested_regd = regd;
3038 spin_unlock(&reg_requests_lock);
3039
3040 kfree(prev_regd);
Arik Nemtsov2c3e8612015-01-07 16:47:19 +02003041 return 0;
3042}
3043
3044int regulatory_set_wiphy_regd(struct wiphy *wiphy,
3045 struct ieee80211_regdomain *rd)
3046{
3047 int ret = __regulatory_set_wiphy_regd(wiphy, rd);
3048
3049 if (ret)
3050 return ret;
Jonathan Doronb0d7aa52014-12-15 19:26:00 +02003051
3052 schedule_work(&reg_work);
3053 return 0;
3054}
3055EXPORT_SYMBOL(regulatory_set_wiphy_regd);
3056
Arik Nemtsov2c3e8612015-01-07 16:47:19 +02003057int regulatory_set_wiphy_regd_sync_rtnl(struct wiphy *wiphy,
3058 struct ieee80211_regdomain *rd)
3059{
3060 int ret;
3061
3062 ASSERT_RTNL();
3063
3064 ret = __regulatory_set_wiphy_regd(wiphy, rd);
3065 if (ret)
3066 return ret;
3067
3068 /* process the request immediately */
3069 reg_process_self_managed_hints();
3070 return 0;
3071}
3072EXPORT_SYMBOL(regulatory_set_wiphy_regd_sync_rtnl);
3073
Luis R. Rodriguez57b5ce02012-07-12 11:49:18 -07003074void wiphy_regulatory_register(struct wiphy *wiphy)
3075{
Arik Nemtsov23df0b72013-07-21 16:36:48 +03003076 struct regulatory_request *lr;
3077
Jonathan Doronb0d7aa52014-12-15 19:26:00 +02003078 /* self-managed devices ignore external hints */
3079 if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED)
3080 wiphy->regulatory_flags |= REGULATORY_DISABLE_BEACON_HINTS |
3081 REGULATORY_COUNTRY_IE_IGNORE;
3082
Luis R. Rodriguez57b5ce02012-07-12 11:49:18 -07003083 if (!reg_dev_ignore_cell_hint(wiphy))
3084 reg_num_devs_support_basehint++;
3085
Arik Nemtsov23df0b72013-07-21 16:36:48 +03003086 lr = get_last_request();
3087 wiphy_update_regulatory(wiphy, lr->initiator);
Luis R. Rodriguez57b5ce02012-07-12 11:49:18 -07003088}
3089
Luis R. Rodriguezbfead082012-07-12 11:49:19 -07003090void wiphy_regulatory_deregister(struct wiphy *wiphy)
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -08003091{
Luis R. Rodriguez0ad8aca2009-03-24 21:21:08 -04003092 struct wiphy *request_wiphy = NULL;
Johannes Bergc492db32012-12-06 16:29:25 +01003093 struct regulatory_request *lr;
Luis R. Rodriguez761cf7e2009-02-21 00:04:25 -05003094
Johannes Bergc492db32012-12-06 16:29:25 +01003095 lr = get_last_request();
Luis R. Rodriguezabc73812009-07-30 17:38:08 -07003096
Luis R. Rodriguez57b5ce02012-07-12 11:49:18 -07003097 if (!reg_dev_ignore_cell_hint(wiphy))
3098 reg_num_devs_support_basehint--;
3099
Johannes Berg458f4f92012-12-06 15:47:38 +01003100 rcu_free_regdom(get_wiphy_regdom(wiphy));
Monam Agarwal34dd8862014-03-24 00:53:40 +05303101 RCU_INIT_POINTER(wiphy->regd, NULL);
Chris Wright0ef9ccd2009-04-24 14:09:31 -07003102
Johannes Bergc492db32012-12-06 16:29:25 +01003103 if (lr)
3104 request_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx);
Luis R. Rodriguez806a9e32009-02-21 00:04:26 -05003105
Chris Wright0ef9ccd2009-04-24 14:09:31 -07003106 if (!request_wiphy || request_wiphy != wiphy)
Johannes Berg38fd2142013-05-10 19:17:17 +02003107 return;
Chris Wright0ef9ccd2009-04-24 14:09:31 -07003108
Johannes Bergc492db32012-12-06 16:29:25 +01003109 lr->wiphy_idx = WIPHY_IDX_INVALID;
3110 lr->country_ie_env = ENVIRON_ANY;
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -08003111}
3112
Ilan Peer174e0cd2014-02-23 09:13:01 +02003113/*
3114 * See http://www.fcc.gov/document/5-ghz-unlicensed-spectrum-unii, for
3115 * UNII band definitions
3116 */
3117int cfg80211_get_unii(int freq)
3118{
3119 /* UNII-1 */
3120 if (freq >= 5150 && freq <= 5250)
3121 return 0;
3122
3123 /* UNII-2A */
3124 if (freq > 5250 && freq <= 5350)
3125 return 1;
3126
3127 /* UNII-2B */
3128 if (freq > 5350 && freq <= 5470)
3129 return 2;
3130
3131 /* UNII-2C */
3132 if (freq > 5470 && freq <= 5725)
3133 return 3;
3134
3135 /* UNII-3 */
3136 if (freq > 5725 && freq <= 5825)
3137 return 4;
3138
3139 return -EINVAL;
3140}
3141
Ilan Peerc8866e52014-02-23 09:13:03 +02003142bool regulatory_indoor_allowed(void)
3143{
3144 return reg_is_indoor;
3145}
3146
Uwe Kleine-König2fcc9f72010-06-18 09:38:55 +02003147int __init regulatory_init(void)
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07003148{
Luis R. Rodriguezbcf4f992009-02-21 00:04:24 -05003149 int err = 0;
Johannes Berg734366d2008-09-15 10:56:48 +02003150
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07003151 reg_pdev = platform_device_register_simple("regulatory", 0, NULL, 0);
3152 if (IS_ERR(reg_pdev))
3153 return PTR_ERR(reg_pdev);
Johannes Berg734366d2008-09-15 10:56:48 +02003154
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05003155 spin_lock_init(&reg_requests_lock);
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05003156 spin_lock_init(&reg_pending_beacons_lock);
Ilan peer05050752015-03-04 00:32:06 -05003157 spin_lock_init(&reg_indoor_lock);
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05003158
Luis R. Rodriguez80007ef2012-03-23 07:23:31 -07003159 reg_regdb_size_check();
3160
Johannes Berg458f4f92012-12-06 15:47:38 +01003161 rcu_assign_pointer(cfg80211_regdomain, cfg80211_world_regdom);
Johannes Berg734366d2008-09-15 10:56:48 +02003162
Luis R. Rodriguez09d989d2010-01-29 19:58:57 -05003163 user_alpha2[0] = '9';
3164 user_alpha2[1] = '7';
3165
Luis R. Rodriguezae9e4b02009-07-14 20:23:15 -04003166 /* We always try to get an update for the static regdomain */
Johannes Berg458f4f92012-12-06 15:47:38 +01003167 err = regulatory_hint_core(cfg80211_world_regdom->alpha2);
Luis R. Rodriguezbcf4f992009-02-21 00:04:24 -05003168 if (err) {
Ola Olsson09d11802015-12-13 19:12:03 +01003169 if (err == -ENOMEM) {
3170 platform_device_unregister(reg_pdev);
Luis R. Rodriguezbcf4f992009-02-21 00:04:24 -05003171 return err;
Ola Olsson09d11802015-12-13 19:12:03 +01003172 }
Luis R. Rodriguezbcf4f992009-02-21 00:04:24 -05003173 /*
3174 * N.B. kobject_uevent_env() can fail mainly for when we're out
3175 * memory which is handled and propagated appropriately above
3176 * but it can also fail during a netlink_broadcast() or during
3177 * early boot for call_usermodehelper(). For now treat these
3178 * errors as non-fatal.
3179 */
Joe Perchese9c02682010-11-16 19:56:49 -08003180 pr_err("kobject_uevent_env() was unable to call CRDA during init\n");
Luis R. Rodriguezbcf4f992009-02-21 00:04:24 -05003181 }
Johannes Berg734366d2008-09-15 10:56:48 +02003182
Luis R. Rodriguezae9e4b02009-07-14 20:23:15 -04003183 /*
3184 * Finally, if the user set the module parameter treat it
3185 * as a user hint.
3186 */
3187 if (!is_world_regdom(ieee80211_regdom))
Luis R. Rodriguez57b5ce02012-07-12 11:49:18 -07003188 regulatory_hint_user(ieee80211_regdom,
3189 NL80211_USER_REG_HINT_USER);
Luis R. Rodriguezae9e4b02009-07-14 20:23:15 -04003190
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07003191 return 0;
3192}
3193
Johannes Berg1a919312012-12-03 17:21:11 +01003194void regulatory_exit(void)
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07003195{
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05003196 struct regulatory_request *reg_request, *tmp;
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05003197 struct reg_beacon *reg_beacon, *btmp;
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05003198
3199 cancel_work_sync(&reg_work);
Johannes Bergb6863032015-10-15 09:25:18 +02003200 cancel_crda_timeout_sync();
Arik Nemtsovad932f02014-11-27 09:44:55 +02003201 cancel_delayed_work_sync(&reg_check_chans);
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05003202
Johannes Berg9027b142012-12-03 17:59:24 +01003203 /* Lock to suppress warnings */
Johannes Berg38fd2142013-05-10 19:17:17 +02003204 rtnl_lock();
Johannes Berg379b82f2012-12-06 15:44:07 +01003205 reset_regdomains(true, NULL);
Johannes Berg38fd2142013-05-10 19:17:17 +02003206 rtnl_unlock();
Johannes Berg734366d2008-09-15 10:56:48 +02003207
Luis R. Rodriguez58ebacc2011-11-08 14:28:06 -08003208 dev_set_uevent_suppress(&reg_pdev->dev, true);
Johannes Bergf6037d02008-10-21 11:01:33 +02003209
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07003210 platform_device_unregister(reg_pdev);
Johannes Berg734366d2008-09-15 10:56:48 +02003211
Johannes Bergfea9bce2012-12-03 17:32:01 +01003212 list_for_each_entry_safe(reg_beacon, btmp, &reg_pending_beacons, list) {
3213 list_del(&reg_beacon->list);
3214 kfree(reg_beacon);
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05003215 }
3216
Johannes Bergfea9bce2012-12-03 17:32:01 +01003217 list_for_each_entry_safe(reg_beacon, btmp, &reg_beacon_list, list) {
3218 list_del(&reg_beacon->list);
3219 kfree(reg_beacon);
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05003220 }
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05003221
Johannes Bergfea9bce2012-12-03 17:32:01 +01003222 list_for_each_entry_safe(reg_request, tmp, &reg_requests_list, list) {
3223 list_del(&reg_request->list);
3224 kfree(reg_request);
Johannes Berg8318d782008-01-24 19:38:38 +01003225 }
Johannes Berg8318d782008-01-24 19:38:38 +01003226}