blob: d8671036c264ff287f1f0a8a12e6ecf577c7143d [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
Luis R. Rodriguez4113f752010-01-04 11:50:11 -050063#ifdef CONFIG_CFG80211_REG_DEBUG
Joe Perches12c5ffb2011-07-29 14:51:25 -070064#define REG_DBG_PRINT(format, args...) \
65 printk(KERN_DEBUG pr_fmt(format), ##args)
Luis R. Rodriguez4113f752010-01-04 11:50:11 -050066#else
John W. Linville82711952010-01-05 17:57:20 -050067#define REG_DBG_PRINT(args...)
Luis R. Rodriguez4113f752010-01-04 11:50:11 -050068#endif
69
Arik Nemtsovad932f02014-11-27 09:44:55 +020070/*
71 * Grace period we give before making sure all current interfaces reside on
72 * channels allowed by the current regulatory domain.
73 */
74#define REG_ENFORCE_GRACE_MS 60000
75
Ilan Peer52616f22014-02-25 16:26:00 +020076/**
77 * enum reg_request_treatment - regulatory request treatment
78 *
79 * @REG_REQ_OK: continue processing the regulatory request
80 * @REG_REQ_IGNORE: ignore the regulatory request
81 * @REG_REQ_INTERSECT: the regulatory domain resulting from this request should
82 * be intersected with the current one.
83 * @REG_REQ_ALREADY_SET: the regulatory request will not change the current
84 * regulatory settings, and no further processing is required.
Ilan Peer52616f22014-02-25 16:26:00 +020085 */
Johannes Berg2f922122012-12-03 17:54:55 +010086enum reg_request_treatment {
87 REG_REQ_OK,
88 REG_REQ_IGNORE,
89 REG_REQ_INTERSECT,
90 REG_REQ_ALREADY_SET,
91};
92
Luis R. Rodrigueza0429942011-11-28 16:47:15 -050093static struct regulatory_request core_request_world = {
94 .initiator = NL80211_REGDOM_SET_BY_CORE,
95 .alpha2[0] = '0',
96 .alpha2[1] = '0',
97 .intersect = false,
98 .processed = true,
99 .country_ie_env = ENVIRON_ANY,
100};
101
Johannes Berg38fd2142013-05-10 19:17:17 +0200102/*
103 * Receipt of information from last regulatory request,
104 * protected by RTNL (and can be accessed with RCU protection)
105 */
Johannes Bergc492db32012-12-06 16:29:25 +0100106static struct regulatory_request __rcu *last_request =
Johannes Bergcec3f0e2014-12-12 12:26:25 +0100107 (void __force __rcu *)&core_request_world;
Johannes Berg734366d2008-09-15 10:56:48 +0200108
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700109/* To trigger userspace events */
110static struct platform_device *reg_pdev;
Johannes Berg8318d782008-01-24 19:38:38 +0100111
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -0500112/*
113 * Central wireless core regulatory domains, we only need two,
Johannes Berg734366d2008-09-15 10:56:48 +0200114 * the current one and a world regulatory domain in case we have no
Johannes Berge8da2bb2012-12-03 23:00:08 +0100115 * information to give us an alpha2.
Johannes Berg38fd2142013-05-10 19:17:17 +0200116 * (protected by RTNL, can be read under RCU)
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -0500117 */
Johannes Berg458f4f92012-12-06 15:47:38 +0100118const struct ieee80211_regdomain __rcu *cfg80211_regdomain;
Johannes Berg734366d2008-09-15 10:56:48 +0200119
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -0500120/*
Luis R. Rodriguez57b5ce02012-07-12 11:49:18 -0700121 * Number of devices that registered to the core
122 * that support cellular base station regulatory hints
Johannes Berg38fd2142013-05-10 19:17:17 +0200123 * (protected by RTNL)
Luis R. Rodriguez57b5ce02012-07-12 11:49:18 -0700124 */
125static int reg_num_devs_support_basehint;
126
Ilan Peer52616f22014-02-25 16:26:00 +0200127/*
128 * State variable indicating if the platform on which the devices
129 * are attached is operating in an indoor environment. The state variable
130 * is relevant for all registered devices.
Ilan Peer52616f22014-02-25 16:26:00 +0200131 */
132static bool reg_is_indoor;
Ilan peer05050752015-03-04 00:32:06 -0500133static spinlock_t reg_indoor_lock;
134
135/* Used to track the userspace process controlling the indoor setting */
136static u32 reg_is_indoor_portid;
Ilan Peer52616f22014-02-25 16:26:00 +0200137
Johannes Berg458f4f92012-12-06 15:47:38 +0100138static const struct ieee80211_regdomain *get_cfg80211_regdom(void)
139{
Johannes Berg38fd2142013-05-10 19:17:17 +0200140 return rtnl_dereference(cfg80211_regdomain);
Johannes Berg458f4f92012-12-06 15:47:38 +0100141}
142
Arik Nemtsovad30ca22014-12-15 19:25:59 +0200143const struct ieee80211_regdomain *get_wiphy_regdom(struct wiphy *wiphy)
Johannes Berg458f4f92012-12-06 15:47:38 +0100144{
Johannes Berg38fd2142013-05-10 19:17:17 +0200145 return rtnl_dereference(wiphy->regd);
Johannes Berg458f4f92012-12-06 15:47:38 +0100146}
147
Luis R. Rodriguez3ef121b2013-11-13 18:54:05 +0100148static const char *reg_dfs_region_str(enum nl80211_dfs_regions dfs_region)
149{
150 switch (dfs_region) {
151 case NL80211_DFS_UNSET:
152 return "unset";
153 case NL80211_DFS_FCC:
154 return "FCC";
155 case NL80211_DFS_ETSI:
156 return "ETSI";
157 case NL80211_DFS_JP:
158 return "JP";
159 }
160 return "Unknown";
161}
162
Luis R. Rodriguez6c474792013-11-25 20:56:09 +0100163enum nl80211_dfs_regions reg_get_dfs_region(struct wiphy *wiphy)
164{
165 const struct ieee80211_regdomain *regd = NULL;
166 const struct ieee80211_regdomain *wiphy_regd = NULL;
167
168 regd = get_cfg80211_regdom();
169 if (!wiphy)
170 goto out;
171
172 wiphy_regd = get_wiphy_regdom(wiphy);
173 if (!wiphy_regd)
174 goto out;
175
176 if (wiphy_regd->dfs_region == regd->dfs_region)
177 goto out;
178
179 REG_DBG_PRINT("%s: device specific dfs_region "
180 "(%s) disagrees with cfg80211's "
181 "central dfs_region (%s)\n",
182 dev_name(&wiphy->dev),
183 reg_dfs_region_str(wiphy_regd->dfs_region),
184 reg_dfs_region_str(regd->dfs_region));
185
186out:
187 return regd->dfs_region;
188}
189
Johannes Berg458f4f92012-12-06 15:47:38 +0100190static void rcu_free_regdom(const struct ieee80211_regdomain *r)
191{
192 if (!r)
193 return;
194 kfree_rcu((struct ieee80211_regdomain *)r, rcu_head);
195}
196
Johannes Bergc492db32012-12-06 16:29:25 +0100197static struct regulatory_request *get_last_request(void)
198{
Johannes Berg38fd2142013-05-10 19:17:17 +0200199 return rcu_dereference_rtnl(last_request);
Johannes Bergc492db32012-12-06 16:29:25 +0100200}
201
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -0500202/* Used to queue up regulatory hints */
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -0500203static LIST_HEAD(reg_requests_list);
204static spinlock_t reg_requests_lock;
205
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -0500206/* Used to queue up beacon hints for review */
207static LIST_HEAD(reg_pending_beacons);
208static spinlock_t reg_pending_beacons_lock;
209
210/* Used to keep track of processed beacon hints */
211static LIST_HEAD(reg_beacon_list);
212
213struct reg_beacon {
214 struct list_head list;
215 struct ieee80211_channel chan;
216};
217
Arik Nemtsovad932f02014-11-27 09:44:55 +0200218static void reg_check_chans_work(struct work_struct *work);
219static DECLARE_DELAYED_WORK(reg_check_chans, reg_check_chans_work);
220
Luis R. Rodriguezf333a7a2010-11-17 21:46:07 -0800221static void reg_todo(struct work_struct *work);
222static DECLARE_WORK(reg_work, reg_todo);
223
Luis R. Rodrigueza90c7a32011-04-05 10:49:04 -0700224static void reg_timeout_work(struct work_struct *work);
225static DECLARE_DELAYED_WORK(reg_timeout, reg_timeout_work);
226
Johannes Berg734366d2008-09-15 10:56:48 +0200227/* We keep a static world regulatory domain in case of the absence of CRDA */
228static const struct ieee80211_regdomain world_regdom = {
Vladimir Kondratiev90cdc6d2012-07-02 09:32:34 +0300229 .n_reg_rules = 6,
Johannes Berg734366d2008-09-15 10:56:48 +0200230 .alpha2 = "00",
231 .reg_rules = {
Luis R. Rodriguez68798a62009-02-21 00:20:37 -0500232 /* IEEE 802.11b/g, channels 1..11 */
233 REG_RULE(2412-10, 2462+10, 40, 6, 20, 0),
Johannes Berg43c771a2012-11-12 10:51:34 +0100234 /* IEEE 802.11b/g, channels 12..13. */
235 REG_RULE(2467-10, 2472+10, 40, 6, 20,
Luis R. Rodriguez8fe02e12013-10-21 19:22:25 +0200236 NL80211_RRF_NO_IR),
Luis R. Rodriguez611b6a82009-03-05 21:19:21 -0800237 /* IEEE 802.11 channel 14 - Only JP enables
238 * this and for 802.11b only */
239 REG_RULE(2484-10, 2484+10, 20, 6, 20,
Luis R. Rodriguez8fe02e12013-10-21 19:22:25 +0200240 NL80211_RRF_NO_IR |
Luis R. Rodriguez611b6a82009-03-05 21:19:21 -0800241 NL80211_RRF_NO_OFDM),
242 /* IEEE 802.11a, channel 36..48 */
Johannes Berg131a19b2013-03-04 20:54:46 +0100243 REG_RULE(5180-10, 5240+10, 160, 6, 20,
Luis R. Rodriguez8fe02e12013-10-21 19:22:25 +0200244 NL80211_RRF_NO_IR),
Luis R. Rodriguez3fc71f72009-02-21 00:20:38 -0500245
Johannes Berg131a19b2013-03-04 20:54:46 +0100246 /* IEEE 802.11a, channel 52..64 - DFS required */
247 REG_RULE(5260-10, 5320+10, 160, 6, 20,
Luis R. Rodriguez8fe02e12013-10-21 19:22:25 +0200248 NL80211_RRF_NO_IR |
Johannes Berg131a19b2013-03-04 20:54:46 +0100249 NL80211_RRF_DFS),
250
251 /* IEEE 802.11a, channel 100..144 - DFS required */
252 REG_RULE(5500-10, 5720+10, 160, 6, 20,
Luis R. Rodriguez8fe02e12013-10-21 19:22:25 +0200253 NL80211_RRF_NO_IR |
Johannes Berg131a19b2013-03-04 20:54:46 +0100254 NL80211_RRF_DFS),
Luis R. Rodriguez3fc71f72009-02-21 00:20:38 -0500255
256 /* IEEE 802.11a, channel 149..165 */
Johannes Berg8ab9d852012-12-03 22:09:22 +0100257 REG_RULE(5745-10, 5825+10, 80, 6, 20,
Luis R. Rodriguez8fe02e12013-10-21 19:22:25 +0200258 NL80211_RRF_NO_IR),
Vladimir Kondratiev90cdc6d2012-07-02 09:32:34 +0300259
260 /* IEEE 802.11ad (60gHz), channels 1..3 */
261 REG_RULE(56160+2160*1-1080, 56160+2160*3+1080, 2160, 0, 0, 0),
Johannes Berg734366d2008-09-15 10:56:48 +0200262 }
263};
264
Johannes Berg38fd2142013-05-10 19:17:17 +0200265/* protected by RTNL */
Johannes Berga3d2eaf2008-09-15 11:10:52 +0200266static const struct ieee80211_regdomain *cfg80211_world_regdom =
267 &world_regdom;
Johannes Berg734366d2008-09-15 10:56:48 +0200268
Luis R. Rodriguez6ee7d332009-03-20 23:53:06 -0400269static char *ieee80211_regdom = "00";
Luis R. Rodriguez09d989d2010-01-29 19:58:57 -0500270static char user_alpha2[2];
Luis R. Rodriguez6ee7d332009-03-20 23:53:06 -0400271
Johannes Berg734366d2008-09-15 10:56:48 +0200272module_param(ieee80211_regdom, charp, 0444);
273MODULE_PARM_DESC(ieee80211_regdom, "IEEE 802.11 regulatory domain code");
274
Arik Nemtsovc8883932014-04-21 20:39:34 -0700275static void reg_free_request(struct regulatory_request *request)
Luis R. Rodriguez5ad6ef52013-11-05 09:18:08 -0800276{
Arik Nemtsovc8883932014-04-21 20:39:34 -0700277 if (request != get_last_request())
278 kfree(request);
279}
280
281static void reg_free_last_request(void)
282{
283 struct regulatory_request *lr = get_last_request();
284
Luis R. Rodriguez5ad6ef52013-11-05 09:18:08 -0800285 if (lr != &core_request_world && lr)
286 kfree_rcu(lr, rcu_head);
287}
288
Luis R. Rodriguez05f1a3e2013-11-05 09:18:09 -0800289static void reg_update_last_request(struct regulatory_request *request)
290{
Luis R. Rodriguez255e25b2014-02-25 17:09:40 -0800291 struct regulatory_request *lr;
292
293 lr = get_last_request();
294 if (lr == request)
295 return;
296
Arik Nemtsovc8883932014-04-21 20:39:34 -0700297 reg_free_last_request();
Luis R. Rodriguez05f1a3e2013-11-05 09:18:09 -0800298 rcu_assign_pointer(last_request, request);
299}
300
Johannes Berg379b82f2012-12-06 15:44:07 +0100301static void reset_regdomains(bool full_reset,
302 const struct ieee80211_regdomain *new_regdom)
Johannes Berg734366d2008-09-15 10:56:48 +0200303{
Johannes Berg458f4f92012-12-06 15:47:38 +0100304 const struct ieee80211_regdomain *r;
305
Johannes Berg38fd2142013-05-10 19:17:17 +0200306 ASSERT_RTNL();
Johannes Berge8da2bb2012-12-03 23:00:08 +0100307
Johannes Berg458f4f92012-12-06 15:47:38 +0100308 r = get_cfg80211_regdom();
309
Johannes Berg942b25c2008-09-15 11:26:47 +0200310 /* avoid freeing static information or freeing something twice */
Johannes Berg458f4f92012-12-06 15:47:38 +0100311 if (r == cfg80211_world_regdom)
312 r = NULL;
Johannes Berg942b25c2008-09-15 11:26:47 +0200313 if (cfg80211_world_regdom == &world_regdom)
314 cfg80211_world_regdom = NULL;
Johannes Berg458f4f92012-12-06 15:47:38 +0100315 if (r == &world_regdom)
316 r = NULL;
Johannes Berg942b25c2008-09-15 11:26:47 +0200317
Johannes Berg458f4f92012-12-06 15:47:38 +0100318 rcu_free_regdom(r);
319 rcu_free_regdom(cfg80211_world_regdom);
Johannes Berg734366d2008-09-15 10:56:48 +0200320
Johannes Berga3d2eaf2008-09-15 11:10:52 +0200321 cfg80211_world_regdom = &world_regdom;
Johannes Berg458f4f92012-12-06 15:47:38 +0100322 rcu_assign_pointer(cfg80211_regdomain, new_regdom);
Luis R. Rodrigueza0429942011-11-28 16:47:15 -0500323
324 if (!full_reset)
325 return;
326
Luis R. Rodriguez05f1a3e2013-11-05 09:18:09 -0800327 reg_update_last_request(&core_request_world);
Johannes Berg734366d2008-09-15 10:56:48 +0200328}
329
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -0500330/*
331 * Dynamic world regulatory domain requested by the wireless
332 * core upon initialization
333 */
Johannes Berga3d2eaf2008-09-15 11:10:52 +0200334static void update_world_regdomain(const struct ieee80211_regdomain *rd)
Johannes Berg734366d2008-09-15 10:56:48 +0200335{
Johannes Bergc492db32012-12-06 16:29:25 +0100336 struct regulatory_request *lr;
Johannes Berg734366d2008-09-15 10:56:48 +0200337
Johannes Bergc492db32012-12-06 16:29:25 +0100338 lr = get_last_request();
339
340 WARN_ON(!lr);
Johannes Berge8da2bb2012-12-03 23:00:08 +0100341
Johannes Berg379b82f2012-12-06 15:44:07 +0100342 reset_regdomains(false, rd);
Johannes Berg734366d2008-09-15 10:56:48 +0200343
344 cfg80211_world_regdom = rd;
Johannes Berg734366d2008-09-15 10:56:48 +0200345}
Johannes Berg734366d2008-09-15 10:56:48 +0200346
Johannes Berga3d2eaf2008-09-15 11:10:52 +0200347bool is_world_regdom(const char *alpha2)
Johannes Berg8318d782008-01-24 19:38:38 +0100348{
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700349 if (!alpha2)
350 return false;
Johannes Berg1a919312012-12-03 17:21:11 +0100351 return alpha2[0] == '0' && alpha2[1] == '0';
Johannes Berg8318d782008-01-24 19:38:38 +0100352}
353
Johannes Berga3d2eaf2008-09-15 11:10:52 +0200354static bool is_alpha2_set(const char *alpha2)
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700355{
356 if (!alpha2)
357 return false;
Johannes Berg1a919312012-12-03 17:21:11 +0100358 return alpha2[0] && alpha2[1];
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700359}
Johannes Berg8318d782008-01-24 19:38:38 +0100360
Johannes Berga3d2eaf2008-09-15 11:10:52 +0200361static bool is_unknown_alpha2(const char *alpha2)
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700362{
363 if (!alpha2)
364 return false;
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -0500365 /*
366 * Special case where regulatory domain was built by driver
367 * but a specific alpha2 cannot be determined
368 */
Johannes Berg1a919312012-12-03 17:21:11 +0100369 return alpha2[0] == '9' && alpha2[1] == '9';
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700370}
371
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -0800372static bool is_intersected_alpha2(const char *alpha2)
373{
374 if (!alpha2)
375 return false;
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -0500376 /*
377 * Special case where regulatory domain is the
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -0800378 * result of an intersection between two regulatory domain
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -0500379 * structures
380 */
Johannes Berg1a919312012-12-03 17:21:11 +0100381 return alpha2[0] == '9' && alpha2[1] == '8';
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -0800382}
383
Johannes Berga3d2eaf2008-09-15 11:10:52 +0200384static bool is_an_alpha2(const char *alpha2)
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700385{
386 if (!alpha2)
387 return false;
Johannes Berg1a919312012-12-03 17:21:11 +0100388 return isalpha(alpha2[0]) && isalpha(alpha2[1]);
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700389}
390
Johannes Berga3d2eaf2008-09-15 11:10:52 +0200391static bool alpha2_equal(const char *alpha2_x, const char *alpha2_y)
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700392{
393 if (!alpha2_x || !alpha2_y)
394 return false;
Johannes Berg1a919312012-12-03 17:21:11 +0100395 return alpha2_x[0] == alpha2_y[0] && alpha2_x[1] == alpha2_y[1];
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700396}
397
Luis R. Rodriguez69b15722009-02-21 00:04:33 -0500398static bool regdom_changes(const char *alpha2)
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700399{
Johannes Berg458f4f92012-12-06 15:47:38 +0100400 const struct ieee80211_regdomain *r = get_cfg80211_regdom();
Luis R. Rodriguez761cf7e2009-02-21 00:04:25 -0500401
Johannes Berg458f4f92012-12-06 15:47:38 +0100402 if (!r)
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700403 return true;
Johannes Berg458f4f92012-12-06 15:47:38 +0100404 return !alpha2_equal(r->alpha2, alpha2);
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700405}
406
Luis R. Rodriguez09d989d2010-01-29 19:58:57 -0500407/*
408 * The NL80211_REGDOM_SET_BY_USER regdom alpha2 is cached, this lets
409 * you know if a valid regulatory hint with NL80211_REGDOM_SET_BY_USER
410 * has ever been issued.
411 */
412static bool is_user_regdom_saved(void)
413{
414 if (user_alpha2[0] == '9' && user_alpha2[1] == '7')
415 return false;
416
417 /* This would indicate a mistake on the design */
Johannes Berg1a919312012-12-03 17:21:11 +0100418 if (WARN(!is_world_regdom(user_alpha2) && !is_an_alpha2(user_alpha2),
Luis R. Rodriguez09d989d2010-01-29 19:58:57 -0500419 "Unexpected user alpha2: %c%c\n",
Johannes Berg1a919312012-12-03 17:21:11 +0100420 user_alpha2[0], user_alpha2[1]))
Luis R. Rodriguez09d989d2010-01-29 19:58:57 -0500421 return false;
422
423 return true;
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
451struct reg_regdb_search_request {
452 char alpha2[2];
453 struct list_head list;
454};
455
456static LIST_HEAD(reg_regdb_search_list);
John W. Linville368d06f2010-03-16 15:40:59 -0400457static DEFINE_MUTEX(reg_regdb_search_mutex);
John W. Linville3b377ea2009-12-18 17:59:01 -0500458
459static void reg_regdb_search(struct work_struct *work)
460{
461 struct reg_regdb_search_request *request;
Johannes Berge9763c32012-12-03 16:59:46 +0100462 const struct ieee80211_regdomain *curdom, *regdom = NULL;
463 int i;
Luis R. Rodrigueza85d0d72012-09-14 15:36:57 -0700464
Johannes Berg5fe231e2013-05-08 21:45:15 +0200465 rtnl_lock();
John W. Linville3b377ea2009-12-18 17:59:01 -0500466
John W. Linville368d06f2010-03-16 15:40:59 -0400467 mutex_lock(&reg_regdb_search_mutex);
John W. Linville3b377ea2009-12-18 17:59:01 -0500468 while (!list_empty(&reg_regdb_search_list)) {
469 request = list_first_entry(&reg_regdb_search_list,
470 struct reg_regdb_search_request,
471 list);
472 list_del(&request->list);
473
Johannes Berg1a919312012-12-03 17:21:11 +0100474 for (i = 0; i < reg_regdb_size; i++) {
John W. Linville3b377ea2009-12-18 17:59:01 -0500475 curdom = reg_regdb[i];
476
Johannes Berg1a919312012-12-03 17:21:11 +0100477 if (alpha2_equal(request->alpha2, curdom->alpha2)) {
Johannes Berge9763c32012-12-03 16:59:46 +0100478 regdom = reg_copy_regd(curdom);
John W. Linville3b377ea2009-12-18 17:59:01 -0500479 break;
480 }
481 }
482
483 kfree(request);
484 }
John W. Linville368d06f2010-03-16 15:40:59 -0400485 mutex_unlock(&reg_regdb_search_mutex);
Luis R. Rodrigueza85d0d72012-09-14 15:36:57 -0700486
Johannes Berge9763c32012-12-03 16:59:46 +0100487 if (!IS_ERR_OR_NULL(regdom))
Luis R. Rodrigueza85d0d72012-09-14 15:36:57 -0700488 set_regdom(regdom);
489
Johannes Berg5fe231e2013-05-08 21:45:15 +0200490 rtnl_unlock();
John W. Linville3b377ea2009-12-18 17:59:01 -0500491}
492
493static DECLARE_WORK(reg_regdb_work, reg_regdb_search);
494
495static void reg_regdb_query(const char *alpha2)
496{
497 struct reg_regdb_search_request *request;
498
499 if (!alpha2)
500 return;
501
502 request = kzalloc(sizeof(struct reg_regdb_search_request), GFP_KERNEL);
503 if (!request)
504 return;
505
506 memcpy(request->alpha2, alpha2, 2);
507
John W. Linville368d06f2010-03-16 15:40:59 -0400508 mutex_lock(&reg_regdb_search_mutex);
John W. Linville3b377ea2009-12-18 17:59:01 -0500509 list_add_tail(&request->list, &reg_regdb_search_list);
John W. Linville368d06f2010-03-16 15:40:59 -0400510 mutex_unlock(&reg_regdb_search_mutex);
John W. Linville3b377ea2009-12-18 17:59:01 -0500511
512 schedule_work(&reg_regdb_work);
513}
Luis R. Rodriguez80007ef2012-03-23 07:23:31 -0700514
515/* Feel free to add any other sanity checks here */
516static void reg_regdb_size_check(void)
517{
518 /* We should ideally BUILD_BUG_ON() but then random builds would fail */
519 WARN_ONCE(!reg_regdb_size, "db.txt is empty, you should update it...");
520}
John W. Linville3b377ea2009-12-18 17:59:01 -0500521#else
Luis R. Rodriguez80007ef2012-03-23 07:23:31 -0700522static inline void reg_regdb_size_check(void) {}
John W. Linville3b377ea2009-12-18 17:59:01 -0500523static inline void reg_regdb_query(const char *alpha2) {}
524#endif /* CONFIG_CFG80211_INTERNAL_REGDB */
525
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -0500526/*
527 * This lets us keep regulatory code which is updated on a regulatory
Johannes Berg1226d252014-02-25 15:43:36 +0100528 * basis in userspace.
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -0500529 */
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700530static int call_crda(const char *alpha2)
531{
Johannes Berg1226d252014-02-25 15:43:36 +0100532 char country[12];
533 char *env[] = { country, NULL };
534
535 snprintf(country, sizeof(country), "COUNTRY=%c%c",
536 alpha2[0], alpha2[1]);
537
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700538 if (!is_world_regdom((char *) alpha2))
Joe Perchese9c02682010-11-16 19:56:49 -0800539 pr_info("Calling CRDA for country: %c%c\n",
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700540 alpha2[0], alpha2[1]);
541 else
Joe Perchese9c02682010-11-16 19:56:49 -0800542 pr_info("Calling CRDA to update world regulatory domain\n");
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700543
John W. Linville3b377ea2009-12-18 17:59:01 -0500544 /* query internal regulatory database (if it exists) */
545 reg_regdb_query(alpha2);
546
Johannes Berg1226d252014-02-25 15:43:36 +0100547 return kobject_uevent_env(&reg_pdev->dev.kobj, KOBJ_CHANGE, env);
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700548}
549
Luis R. Rodriguezfe6631f2013-11-05 09:18:10 -0800550static enum reg_request_treatment
551reg_call_crda(struct regulatory_request *request)
552{
553 if (call_crda(request->alpha2))
554 return REG_REQ_IGNORE;
Ilan peereeca9fc2015-03-04 00:32:07 -0500555
556 queue_delayed_work(system_power_efficient_wq,
557 &reg_timeout, msecs_to_jiffies(3142));
Luis R. Rodriguezfe6631f2013-11-05 09:18:10 -0800558 return REG_REQ_OK;
559}
560
Luis R. Rodrigueze4387682013-11-05 09:18:01 -0800561bool reg_is_valid_request(const char *alpha2)
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700562{
Johannes Bergc492db32012-12-06 16:29:25 +0100563 struct regulatory_request *lr = get_last_request();
Luis R. Rodriguez61405e92009-05-13 17:04:41 -0400564
Johannes Bergc492db32012-12-06 16:29:25 +0100565 if (!lr || lr->processed)
Johannes Bergf6037d02008-10-21 11:01:33 +0200566 return false;
567
Johannes Bergc492db32012-12-06 16:29:25 +0100568 return alpha2_equal(lr->alpha2, alpha2);
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700569}
570
Janusz Dziedzice3961af2014-01-25 11:24:11 +0100571static const struct ieee80211_regdomain *reg_get_regdomain(struct wiphy *wiphy)
572{
573 struct regulatory_request *lr = get_last_request();
574
575 /*
576 * Follow the driver's regulatory domain, if present, unless a country
577 * IE has been processed or a user wants to help complaince further
578 */
579 if (lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE &&
580 lr->initiator != NL80211_REGDOM_SET_BY_USER &&
581 wiphy->regd)
582 return get_wiphy_regdom(wiphy);
583
584 return get_cfg80211_regdom();
585}
586
Arik Nemtsova6d4a532014-10-23 09:37:33 +0300587static unsigned int
588reg_get_max_bandwidth_from_range(const struct ieee80211_regdomain *rd,
589 const struct ieee80211_reg_rule *rule)
Janusz Dziedzic97524822014-01-30 09:52:20 +0100590{
591 const struct ieee80211_freq_range *freq_range = &rule->freq_range;
592 const struct ieee80211_freq_range *freq_range_tmp;
593 const struct ieee80211_reg_rule *tmp;
594 u32 start_freq, end_freq, idx, no;
595
596 for (idx = 0; idx < rd->n_reg_rules; idx++)
597 if (rule == &rd->reg_rules[idx])
598 break;
599
600 if (idx == rd->n_reg_rules)
601 return 0;
602
603 /* get start_freq */
604 no = idx;
605
606 while (no) {
607 tmp = &rd->reg_rules[--no];
608 freq_range_tmp = &tmp->freq_range;
609
610 if (freq_range_tmp->end_freq_khz < freq_range->start_freq_khz)
611 break;
612
Janusz Dziedzic97524822014-01-30 09:52:20 +0100613 freq_range = freq_range_tmp;
614 }
615
616 start_freq = freq_range->start_freq_khz;
617
618 /* get end_freq */
619 freq_range = &rule->freq_range;
620 no = idx;
621
622 while (no < rd->n_reg_rules - 1) {
623 tmp = &rd->reg_rules[++no];
624 freq_range_tmp = &tmp->freq_range;
625
626 if (freq_range_tmp->start_freq_khz > freq_range->end_freq_khz)
627 break;
628
Janusz Dziedzic97524822014-01-30 09:52:20 +0100629 freq_range = freq_range_tmp;
630 }
631
632 end_freq = freq_range->end_freq_khz;
633
634 return end_freq - start_freq;
635}
636
Arik Nemtsova6d4a532014-10-23 09:37:33 +0300637unsigned int reg_get_max_bandwidth(const struct ieee80211_regdomain *rd,
638 const struct ieee80211_reg_rule *rule)
639{
640 unsigned int bw = reg_get_max_bandwidth_from_range(rd, rule);
641
642 if (rule->flags & NL80211_RRF_NO_160MHZ)
643 bw = min_t(unsigned int, bw, MHZ_TO_KHZ(80));
644 if (rule->flags & NL80211_RRF_NO_80MHZ)
645 bw = min_t(unsigned int, bw, MHZ_TO_KHZ(40));
646
647 /*
648 * HT40+/HT40- limits are handled per-channel. Only limit BW if both
649 * are not allowed.
650 */
651 if (rule->flags & NL80211_RRF_NO_HT40MINUS &&
652 rule->flags & NL80211_RRF_NO_HT40PLUS)
653 bw = min_t(unsigned int, bw, MHZ_TO_KHZ(20));
654
655 return bw;
656}
657
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700658/* Sanity check on a regulatory rule */
Johannes Berga3d2eaf2008-09-15 11:10:52 +0200659static bool is_valid_reg_rule(const struct ieee80211_reg_rule *rule)
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700660{
Johannes Berga3d2eaf2008-09-15 11:10:52 +0200661 const struct ieee80211_freq_range *freq_range = &rule->freq_range;
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700662 u32 freq_diff;
663
Luis R. Rodriguez91e99002008-11-12 14:21:55 -0800664 if (freq_range->start_freq_khz <= 0 || freq_range->end_freq_khz <= 0)
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700665 return false;
666
667 if (freq_range->start_freq_khz > freq_range->end_freq_khz)
668 return false;
669
670 freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz;
671
Roel Kluinbd05f282009-03-03 22:55:21 +0100672 if (freq_range->end_freq_khz <= freq_range->start_freq_khz ||
Johannes Berg1a919312012-12-03 17:21:11 +0100673 freq_range->max_bandwidth_khz > freq_diff)
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700674 return false;
675
676 return true;
677}
678
Johannes Berga3d2eaf2008-09-15 11:10:52 +0200679static bool is_valid_rd(const struct ieee80211_regdomain *rd)
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700680{
Johannes Berga3d2eaf2008-09-15 11:10:52 +0200681 const struct ieee80211_reg_rule *reg_rule = NULL;
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700682 unsigned int i;
683
684 if (!rd->n_reg_rules)
685 return false;
686
Luis R. Rodriguez88dc1c32008-11-12 14:22:01 -0800687 if (WARN_ON(rd->n_reg_rules > NL80211_MAX_SUPP_REG_RULES))
688 return false;
689
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700690 for (i = 0; i < rd->n_reg_rules; i++) {
691 reg_rule = &rd->reg_rules[i];
692 if (!is_valid_reg_rule(reg_rule))
693 return false;
694 }
695
696 return true;
697}
698
Luis R. Rodriguez038659e2009-05-02 00:37:17 -0400699static bool reg_does_bw_fit(const struct ieee80211_freq_range *freq_range,
Johannes Bergfe7ef5e2012-12-04 15:07:34 +0100700 u32 center_freq_khz, u32 bw_khz)
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700701{
Luis R. Rodriguez038659e2009-05-02 00:37:17 -0400702 u32 start_freq_khz, end_freq_khz;
703
704 start_freq_khz = center_freq_khz - (bw_khz/2);
705 end_freq_khz = center_freq_khz + (bw_khz/2);
706
707 if (start_freq_khz >= freq_range->start_freq_khz &&
708 end_freq_khz <= freq_range->end_freq_khz)
709 return true;
710
711 return false;
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700712}
713
Luis R. Rodriguez0c7dc452009-01-07 17:43:36 -0800714/**
715 * freq_in_rule_band - tells us if a frequency is in a frequency band
716 * @freq_range: frequency rule we want to query
717 * @freq_khz: frequency we are inquiring about
718 *
719 * This lets us know if a specific frequency rule is or is not relevant to
720 * a specific frequency's band. Bands are device specific and artificial
Vladimir Kondratiev64629b92012-09-23 09:49:54 +0200721 * definitions (the "2.4 GHz band", the "5 GHz band" and the "60GHz band"),
722 * however it is safe for now to assume that a frequency rule should not be
723 * part of a frequency's band if the start freq or end freq are off by more
724 * than 2 GHz for the 2.4 and 5 GHz bands, and by more than 10 GHz for the
725 * 60 GHz band.
Luis R. Rodriguez0c7dc452009-01-07 17:43:36 -0800726 * This resolution can be lowered and should be considered as we add
727 * regulatory rule support for other "bands".
728 **/
729static bool freq_in_rule_band(const struct ieee80211_freq_range *freq_range,
Johannes Berg1a919312012-12-03 17:21:11 +0100730 u32 freq_khz)
Luis R. Rodriguez0c7dc452009-01-07 17:43:36 -0800731{
732#define ONE_GHZ_IN_KHZ 1000000
Vladimir Kondratiev64629b92012-09-23 09:49:54 +0200733 /*
734 * From 802.11ad: directional multi-gigabit (DMG):
735 * Pertaining to operation in a frequency band containing a channel
736 * with the Channel starting frequency above 45 GHz.
737 */
738 u32 limit = freq_khz > 45 * ONE_GHZ_IN_KHZ ?
739 10 * ONE_GHZ_IN_KHZ : 2 * ONE_GHZ_IN_KHZ;
740 if (abs(freq_khz - freq_range->start_freq_khz) <= limit)
Luis R. Rodriguez0c7dc452009-01-07 17:43:36 -0800741 return true;
Vladimir Kondratiev64629b92012-09-23 09:49:54 +0200742 if (abs(freq_khz - freq_range->end_freq_khz) <= limit)
Luis R. Rodriguez0c7dc452009-01-07 17:43:36 -0800743 return true;
744 return false;
745#undef ONE_GHZ_IN_KHZ
746}
747
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -0500748/*
Luis R. Rodriguezadbfb052013-11-13 18:54:03 +0100749 * Later on we can perhaps use the more restrictive DFS
750 * region but we don't have information for that yet so
751 * for now simply disallow conflicts.
752 */
753static enum nl80211_dfs_regions
754reg_intersect_dfs_region(const enum nl80211_dfs_regions dfs_region1,
755 const enum nl80211_dfs_regions dfs_region2)
756{
757 if (dfs_region1 != dfs_region2)
758 return NL80211_DFS_UNSET;
759 return dfs_region1;
760}
761
762/*
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -0500763 * Helper for regdom_intersect(), this does the real
764 * mathematical intersection fun
765 */
Janusz Dziedzic97524822014-01-30 09:52:20 +0100766static int reg_rules_intersect(const struct ieee80211_regdomain *rd1,
767 const struct ieee80211_regdomain *rd2,
768 const struct ieee80211_reg_rule *rule1,
Johannes Berg1a919312012-12-03 17:21:11 +0100769 const struct ieee80211_reg_rule *rule2,
770 struct ieee80211_reg_rule *intersected_rule)
Luis R. Rodriguez9c964772008-10-30 13:33:53 -0700771{
772 const struct ieee80211_freq_range *freq_range1, *freq_range2;
773 struct ieee80211_freq_range *freq_range;
774 const struct ieee80211_power_rule *power_rule1, *power_rule2;
775 struct ieee80211_power_rule *power_rule;
Janusz Dziedzic97524822014-01-30 09:52:20 +0100776 u32 freq_diff, max_bandwidth1, max_bandwidth2;
Luis R. Rodriguez9c964772008-10-30 13:33:53 -0700777
778 freq_range1 = &rule1->freq_range;
779 freq_range2 = &rule2->freq_range;
780 freq_range = &intersected_rule->freq_range;
781
782 power_rule1 = &rule1->power_rule;
783 power_rule2 = &rule2->power_rule;
784 power_rule = &intersected_rule->power_rule;
785
786 freq_range->start_freq_khz = max(freq_range1->start_freq_khz,
Johannes Berg1a919312012-12-03 17:21:11 +0100787 freq_range2->start_freq_khz);
Luis R. Rodriguez9c964772008-10-30 13:33:53 -0700788 freq_range->end_freq_khz = min(freq_range1->end_freq_khz,
Johannes Berg1a919312012-12-03 17:21:11 +0100789 freq_range2->end_freq_khz);
Janusz Dziedzic97524822014-01-30 09:52:20 +0100790
791 max_bandwidth1 = freq_range1->max_bandwidth_khz;
792 max_bandwidth2 = freq_range2->max_bandwidth_khz;
793
Janusz Dziedzicb0dfd2e2014-02-20 13:52:16 +0100794 if (rule1->flags & NL80211_RRF_AUTO_BW)
795 max_bandwidth1 = reg_get_max_bandwidth(rd1, rule1);
796 if (rule2->flags & NL80211_RRF_AUTO_BW)
797 max_bandwidth2 = reg_get_max_bandwidth(rd2, rule2);
Janusz Dziedzic97524822014-01-30 09:52:20 +0100798
799 freq_range->max_bandwidth_khz = min(max_bandwidth1, max_bandwidth2);
Luis R. Rodriguez9c964772008-10-30 13:33:53 -0700800
Janusz Dziedzicb0dfd2e2014-02-20 13:52:16 +0100801 intersected_rule->flags = rule1->flags | rule2->flags;
802
803 /*
804 * In case NL80211_RRF_AUTO_BW requested for both rules
805 * set AUTO_BW in intersected rule also. Next we will
806 * calculate BW correctly in handle_channel function.
807 * In other case remove AUTO_BW flag while we calculate
808 * maximum bandwidth correctly and auto calculation is
809 * not required.
810 */
811 if ((rule1->flags & NL80211_RRF_AUTO_BW) &&
812 (rule2->flags & NL80211_RRF_AUTO_BW))
813 intersected_rule->flags |= NL80211_RRF_AUTO_BW;
814 else
815 intersected_rule->flags &= ~NL80211_RRF_AUTO_BW;
816
Luis R. Rodriguez9c964772008-10-30 13:33:53 -0700817 freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz;
818 if (freq_range->max_bandwidth_khz > freq_diff)
819 freq_range->max_bandwidth_khz = freq_diff;
820
821 power_rule->max_eirp = min(power_rule1->max_eirp,
822 power_rule2->max_eirp);
823 power_rule->max_antenna_gain = min(power_rule1->max_antenna_gain,
824 power_rule2->max_antenna_gain);
825
Janusz Dziedzic089027e2014-02-21 19:46:12 +0100826 intersected_rule->dfs_cac_ms = max(rule1->dfs_cac_ms,
827 rule2->dfs_cac_ms);
828
Luis R. Rodriguez9c964772008-10-30 13:33:53 -0700829 if (!is_valid_reg_rule(intersected_rule))
830 return -EINVAL;
831
832 return 0;
833}
834
Eliad Pellera62a1ae2014-09-03 15:25:03 +0300835/* check whether old rule contains new rule */
836static bool rule_contains(struct ieee80211_reg_rule *r1,
837 struct ieee80211_reg_rule *r2)
838{
839 /* for simplicity, currently consider only same flags */
840 if (r1->flags != r2->flags)
841 return false;
842
843 /* verify r1 is more restrictive */
844 if ((r1->power_rule.max_antenna_gain >
845 r2->power_rule.max_antenna_gain) ||
846 r1->power_rule.max_eirp > r2->power_rule.max_eirp)
847 return false;
848
849 /* make sure r2's range is contained within r1 */
850 if (r1->freq_range.start_freq_khz > r2->freq_range.start_freq_khz ||
851 r1->freq_range.end_freq_khz < r2->freq_range.end_freq_khz)
852 return false;
853
854 /* and finally verify that r1.max_bw >= r2.max_bw */
855 if (r1->freq_range.max_bandwidth_khz <
856 r2->freq_range.max_bandwidth_khz)
857 return false;
858
859 return true;
860}
861
862/* add or extend current rules. do nothing if rule is already contained */
863static void add_rule(struct ieee80211_reg_rule *rule,
864 struct ieee80211_reg_rule *reg_rules, u32 *n_rules)
865{
866 struct ieee80211_reg_rule *tmp_rule;
867 int i;
868
869 for (i = 0; i < *n_rules; i++) {
870 tmp_rule = &reg_rules[i];
871 /* rule is already contained - do nothing */
872 if (rule_contains(tmp_rule, rule))
873 return;
874
875 /* extend rule if possible */
876 if (rule_contains(rule, tmp_rule)) {
877 memcpy(tmp_rule, rule, sizeof(*rule));
878 return;
879 }
880 }
881
882 memcpy(&reg_rules[*n_rules], rule, sizeof(*rule));
883 (*n_rules)++;
884}
885
Luis R. Rodriguez9c964772008-10-30 13:33:53 -0700886/**
887 * regdom_intersect - do the intersection between two regulatory domains
888 * @rd1: first regulatory domain
889 * @rd2: second regulatory domain
890 *
891 * Use this function to get the intersection between two regulatory domains.
892 * Once completed we will mark the alpha2 for the rd as intersected, "98",
893 * as no one single alpha2 can represent this regulatory domain.
894 *
895 * Returns a pointer to the regulatory domain structure which will hold the
896 * resulting intersection of rules between rd1 and rd2. We will
897 * kzalloc() this structure for you.
898 */
Johannes Berg1a919312012-12-03 17:21:11 +0100899static struct ieee80211_regdomain *
900regdom_intersect(const struct ieee80211_regdomain *rd1,
901 const struct ieee80211_regdomain *rd2)
Luis R. Rodriguez9c964772008-10-30 13:33:53 -0700902{
903 int r, size_of_regd;
904 unsigned int x, y;
Eliad Pellera62a1ae2014-09-03 15:25:03 +0300905 unsigned int num_rules = 0;
Luis R. Rodriguez9c964772008-10-30 13:33:53 -0700906 const struct ieee80211_reg_rule *rule1, *rule2;
Eliad Pellera62a1ae2014-09-03 15:25:03 +0300907 struct ieee80211_reg_rule intersected_rule;
Luis R. Rodriguez9c964772008-10-30 13:33:53 -0700908 struct ieee80211_regdomain *rd;
Luis R. Rodriguez9c964772008-10-30 13:33:53 -0700909
910 if (!rd1 || !rd2)
911 return NULL;
912
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -0500913 /*
914 * First we get a count of the rules we'll need, then we actually
Luis R. Rodriguez9c964772008-10-30 13:33:53 -0700915 * build them. This is to so we can malloc() and free() a
916 * regdomain once. The reason we use reg_rules_intersect() here
917 * is it will return -EINVAL if the rule computed makes no sense.
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -0500918 * All rules that do check out OK are valid.
919 */
Luis R. Rodriguez9c964772008-10-30 13:33:53 -0700920
921 for (x = 0; x < rd1->n_reg_rules; x++) {
922 rule1 = &rd1->reg_rules[x];
923 for (y = 0; y < rd2->n_reg_rules; y++) {
924 rule2 = &rd2->reg_rules[y];
Janusz Dziedzic97524822014-01-30 09:52:20 +0100925 if (!reg_rules_intersect(rd1, rd2, rule1, rule2,
Eliad Pellera62a1ae2014-09-03 15:25:03 +0300926 &intersected_rule))
Luis R. Rodriguez9c964772008-10-30 13:33:53 -0700927 num_rules++;
Luis R. Rodriguez9c964772008-10-30 13:33:53 -0700928 }
929 }
930
931 if (!num_rules)
932 return NULL;
933
934 size_of_regd = sizeof(struct ieee80211_regdomain) +
Johannes Berg82f20852012-12-04 12:49:16 +0100935 num_rules * sizeof(struct ieee80211_reg_rule);
Luis R. Rodriguez9c964772008-10-30 13:33:53 -0700936
937 rd = kzalloc(size_of_regd, GFP_KERNEL);
938 if (!rd)
939 return NULL;
940
Eliad Pellera62a1ae2014-09-03 15:25:03 +0300941 for (x = 0; x < rd1->n_reg_rules; x++) {
Luis R. Rodriguez9c964772008-10-30 13:33:53 -0700942 rule1 = &rd1->reg_rules[x];
Eliad Pellera62a1ae2014-09-03 15:25:03 +0300943 for (y = 0; y < rd2->n_reg_rules; y++) {
Luis R. Rodriguez9c964772008-10-30 13:33:53 -0700944 rule2 = &rd2->reg_rules[y];
Janusz Dziedzic97524822014-01-30 09:52:20 +0100945 r = reg_rules_intersect(rd1, rd2, rule1, rule2,
Eliad Pellera62a1ae2014-09-03 15:25:03 +0300946 &intersected_rule);
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -0500947 /*
948 * No need to memset here the intersected rule here as
949 * we're not using the stack anymore
950 */
Luis R. Rodriguez9c964772008-10-30 13:33:53 -0700951 if (r)
952 continue;
Eliad Pellera62a1ae2014-09-03 15:25:03 +0300953
954 add_rule(&intersected_rule, rd->reg_rules,
955 &rd->n_reg_rules);
Luis R. Rodriguez9c964772008-10-30 13:33:53 -0700956 }
957 }
958
Luis R. Rodriguez9c964772008-10-30 13:33:53 -0700959 rd->alpha2[0] = '9';
960 rd->alpha2[1] = '8';
Luis R. Rodriguezadbfb052013-11-13 18:54:03 +0100961 rd->dfs_region = reg_intersect_dfs_region(rd1->dfs_region,
962 rd2->dfs_region);
Luis R. Rodriguez9c964772008-10-30 13:33:53 -0700963
964 return rd;
965}
966
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -0500967/*
968 * XXX: add support for the rest of enum nl80211_reg_rule_flags, we may
969 * want to just have the channel structure use these
970 */
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700971static u32 map_regdom_flags(u32 rd_flags)
972{
973 u32 channel_flags = 0;
Luis R. Rodriguez8fe02e12013-10-21 19:22:25 +0200974 if (rd_flags & NL80211_RRF_NO_IR_ALL)
975 channel_flags |= IEEE80211_CHAN_NO_IR;
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700976 if (rd_flags & NL80211_RRF_DFS)
977 channel_flags |= IEEE80211_CHAN_RADAR;
Seth Forshee03f6b082012-08-01 15:58:42 -0500978 if (rd_flags & NL80211_RRF_NO_OFDM)
979 channel_flags |= IEEE80211_CHAN_NO_OFDM;
David Spinadel570dbde2014-02-23 09:12:59 +0200980 if (rd_flags & NL80211_RRF_NO_OUTDOOR)
981 channel_flags |= IEEE80211_CHAN_INDOOR_ONLY;
Arik Nemtsova6d4a532014-10-23 09:37:33 +0300982 if (rd_flags & NL80211_RRF_GO_CONCURRENT)
983 channel_flags |= IEEE80211_CHAN_GO_CONCURRENT;
984 if (rd_flags & NL80211_RRF_NO_HT40MINUS)
985 channel_flags |= IEEE80211_CHAN_NO_HT40MINUS;
986 if (rd_flags & NL80211_RRF_NO_HT40PLUS)
987 channel_flags |= IEEE80211_CHAN_NO_HT40PLUS;
988 if (rd_flags & NL80211_RRF_NO_80MHZ)
989 channel_flags |= IEEE80211_CHAN_NO_80MHZ;
990 if (rd_flags & NL80211_RRF_NO_160MHZ)
991 channel_flags |= IEEE80211_CHAN_NO_160MHZ;
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700992 return channel_flags;
993}
994
Johannes Berg361c9c82012-12-06 15:57:14 +0100995static const struct ieee80211_reg_rule *
996freq_reg_info_regd(struct wiphy *wiphy, u32 center_freq,
997 const struct ieee80211_regdomain *regd)
Johannes Berg8318d782008-01-24 19:38:38 +0100998{
999 int i;
Luis R. Rodriguez0c7dc452009-01-07 17:43:36 -08001000 bool band_rule_found = false;
Luis R. Rodriguez038659e2009-05-02 00:37:17 -04001001 bool bw_fits = false;
1002
Luis R. Rodriguez3e0c3ff2009-01-07 17:43:34 -08001003 if (!regd)
Johannes Berg361c9c82012-12-06 15:57:14 +01001004 return ERR_PTR(-EINVAL);
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07001005
Luis R. Rodriguez3e0c3ff2009-01-07 17:43:34 -08001006 for (i = 0; i < regd->n_reg_rules; i++) {
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07001007 const struct ieee80211_reg_rule *rr;
1008 const struct ieee80211_freq_range *fr = NULL;
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07001009
Luis R. Rodriguez3e0c3ff2009-01-07 17:43:34 -08001010 rr = &regd->reg_rules[i];
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07001011 fr = &rr->freq_range;
Luis R. Rodriguez0c7dc452009-01-07 17:43:36 -08001012
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -05001013 /*
1014 * We only need to know if one frequency rule was
Luis R. Rodriguez0c7dc452009-01-07 17:43:36 -08001015 * was in center_freq's band, that's enough, so lets
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -05001016 * not overwrite it once found
1017 */
Luis R. Rodriguez0c7dc452009-01-07 17:43:36 -08001018 if (!band_rule_found)
1019 band_rule_found = freq_in_rule_band(fr, center_freq);
1020
Johannes Berge33e2242014-06-23 11:06:16 +02001021 bw_fits = reg_does_bw_fit(fr, center_freq, MHZ_TO_KHZ(20));
Luis R. Rodriguez0c7dc452009-01-07 17:43:36 -08001022
Johannes Berg361c9c82012-12-06 15:57:14 +01001023 if (band_rule_found && bw_fits)
1024 return rr;
Johannes Berg8318d782008-01-24 19:38:38 +01001025 }
1026
Luis R. Rodriguez0c7dc452009-01-07 17:43:36 -08001027 if (!band_rule_found)
Johannes Berg361c9c82012-12-06 15:57:14 +01001028 return ERR_PTR(-ERANGE);
Luis R. Rodriguez0c7dc452009-01-07 17:43:36 -08001029
Johannes Berg361c9c82012-12-06 15:57:14 +01001030 return ERR_PTR(-EINVAL);
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07001031}
1032
Johannes Berg361c9c82012-12-06 15:57:14 +01001033const struct ieee80211_reg_rule *freq_reg_info(struct wiphy *wiphy,
1034 u32 center_freq)
Luis R. Rodriguez1fa25e42009-01-22 15:05:44 -08001035{
Johannes Berg5d885b92012-12-04 00:14:17 +01001036 const struct ieee80211_regdomain *regd;
Johannes Berg1a919312012-12-03 17:21:11 +01001037
Janusz Dziedzice3961af2014-01-25 11:24:11 +01001038 regd = reg_get_regdomain(wiphy);
Johannes Berg5d885b92012-12-04 00:14:17 +01001039
Johannes Berg361c9c82012-12-06 15:57:14 +01001040 return freq_reg_info_regd(wiphy, center_freq, regd);
Luis R. Rodriguez1fa25e42009-01-22 15:05:44 -08001041}
John W. Linville4f366c52010-07-15 14:57:33 -04001042EXPORT_SYMBOL(freq_reg_info);
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07001043
Luis R. Rodriguez034c6d62013-10-14 17:42:06 -07001044const char *reg_initiator_name(enum nl80211_reg_initiator initiator)
Luis R. Rodriguez926a0a02010-10-21 19:17:03 +05301045{
1046 switch (initiator) {
1047 case NL80211_REGDOM_SET_BY_CORE:
Luis R. Rodriguez034c6d62013-10-14 17:42:06 -07001048 return "core";
Luis R. Rodriguez926a0a02010-10-21 19:17:03 +05301049 case NL80211_REGDOM_SET_BY_USER:
Luis R. Rodriguez034c6d62013-10-14 17:42:06 -07001050 return "user";
Luis R. Rodriguez926a0a02010-10-21 19:17:03 +05301051 case NL80211_REGDOM_SET_BY_DRIVER:
Luis R. Rodriguez034c6d62013-10-14 17:42:06 -07001052 return "driver";
Luis R. Rodriguez926a0a02010-10-21 19:17:03 +05301053 case NL80211_REGDOM_SET_BY_COUNTRY_IE:
Luis R. Rodriguez034c6d62013-10-14 17:42:06 -07001054 return "country IE";
Luis R. Rodriguez926a0a02010-10-21 19:17:03 +05301055 default:
1056 WARN_ON(1);
Luis R. Rodriguez034c6d62013-10-14 17:42:06 -07001057 return "bug";
Luis R. Rodriguez926a0a02010-10-21 19:17:03 +05301058 }
1059}
Luis R. Rodriguez034c6d62013-10-14 17:42:06 -07001060EXPORT_SYMBOL(reg_initiator_name);
Luis R. Rodrigueze702d3c2010-10-21 19:17:04 +05301061
Luis R. Rodriguez034c6d62013-10-14 17:42:06 -07001062#ifdef CONFIG_CFG80211_REG_DEBUG
Janusz Dziedzicb0dfd2e2014-02-20 13:52:16 +01001063static void chan_reg_rule_print_dbg(const struct ieee80211_regdomain *regd,
1064 struct ieee80211_channel *chan,
Luis R. Rodrigueze702d3c2010-10-21 19:17:04 +05301065 const struct ieee80211_reg_rule *reg_rule)
1066{
1067 const struct ieee80211_power_rule *power_rule;
1068 const struct ieee80211_freq_range *freq_range;
Janusz Dziedzicb0dfd2e2014-02-20 13:52:16 +01001069 char max_antenna_gain[32], bw[32];
Luis R. Rodrigueze702d3c2010-10-21 19:17:04 +05301070
1071 power_rule = &reg_rule->power_rule;
1072 freq_range = &reg_rule->freq_range;
1073
1074 if (!power_rule->max_antenna_gain)
Janusz Dziedzicb0dfd2e2014-02-20 13:52:16 +01001075 snprintf(max_antenna_gain, sizeof(max_antenna_gain), "N/A");
Luis R. Rodrigueze702d3c2010-10-21 19:17:04 +05301076 else
Janusz Dziedzicb0dfd2e2014-02-20 13:52:16 +01001077 snprintf(max_antenna_gain, sizeof(max_antenna_gain), "%d",
1078 power_rule->max_antenna_gain);
1079
1080 if (reg_rule->flags & NL80211_RRF_AUTO_BW)
1081 snprintf(bw, sizeof(bw), "%d KHz, %d KHz AUTO",
1082 freq_range->max_bandwidth_khz,
1083 reg_get_max_bandwidth(regd, reg_rule));
1084 else
1085 snprintf(bw, sizeof(bw), "%d KHz",
1086 freq_range->max_bandwidth_khz);
Luis R. Rodrigueze702d3c2010-10-21 19:17:04 +05301087
Johannes Bergfe7ef5e2012-12-04 15:07:34 +01001088 REG_DBG_PRINT("Updating information on frequency %d MHz with regulatory rule:\n",
1089 chan->center_freq);
Luis R. Rodrigueze702d3c2010-10-21 19:17:04 +05301090
Janusz Dziedzicb0dfd2e2014-02-20 13:52:16 +01001091 REG_DBG_PRINT("%d KHz - %d KHz @ %s), (%s mBi, %d mBm)\n",
Johannes Berg1a919312012-12-03 17:21:11 +01001092 freq_range->start_freq_khz, freq_range->end_freq_khz,
Janusz Dziedzicb0dfd2e2014-02-20 13:52:16 +01001093 bw, max_antenna_gain,
Luis R. Rodrigueze702d3c2010-10-21 19:17:04 +05301094 power_rule->max_eirp);
1095}
1096#else
Janusz Dziedzicb0dfd2e2014-02-20 13:52:16 +01001097static void chan_reg_rule_print_dbg(const struct ieee80211_regdomain *regd,
1098 struct ieee80211_channel *chan,
Luis R. Rodrigueze702d3c2010-10-21 19:17:04 +05301099 const struct ieee80211_reg_rule *reg_rule)
1100{
1101 return;
1102}
Luis R. Rodriguez926a0a02010-10-21 19:17:03 +05301103#endif
1104
Johannes Berge33e2242014-06-23 11:06:16 +02001105/*
1106 * Note that right now we assume the desired channel bandwidth
1107 * is always 20 MHz for each individual channel (HT40 uses 20 MHz
1108 * per channel, the primary and the extension channel).
Luis R. Rodriguez038659e2009-05-02 00:37:17 -04001109 */
Luis R. Rodriguez7ca43d02010-10-20 10:18:53 -07001110static void handle_channel(struct wiphy *wiphy,
1111 enum nl80211_reg_initiator initiator,
Johannes Bergfdc9d7b2012-12-03 18:36:09 +01001112 struct ieee80211_channel *chan)
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07001113{
Luis R. Rodriguez038659e2009-05-02 00:37:17 -04001114 u32 flags, bw_flags = 0;
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07001115 const struct ieee80211_reg_rule *reg_rule = NULL;
1116 const struct ieee80211_power_rule *power_rule = NULL;
Luis R. Rodriguez038659e2009-05-02 00:37:17 -04001117 const struct ieee80211_freq_range *freq_range = NULL;
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05001118 struct wiphy *request_wiphy = NULL;
Johannes Bergc492db32012-12-06 16:29:25 +01001119 struct regulatory_request *lr = get_last_request();
Janusz Dziedzic97524822014-01-30 09:52:20 +01001120 const struct ieee80211_regdomain *regd;
1121 u32 max_bandwidth_khz;
Luis R. Rodrigueza92a3ce2009-01-07 17:43:33 -08001122
Johannes Bergc492db32012-12-06 16:29:25 +01001123 request_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx);
Luis R. Rodrigueza92a3ce2009-01-07 17:43:33 -08001124
1125 flags = chan->orig_flags;
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07001126
Johannes Berg361c9c82012-12-06 15:57:14 +01001127 reg_rule = freq_reg_info(wiphy, MHZ_TO_KHZ(chan->center_freq));
1128 if (IS_ERR(reg_rule)) {
Luis R. Rodriguezca4ffe82010-10-20 10:18:55 -07001129 /*
1130 * We will disable all channels that do not match our
Lucas De Marchi25985ed2011-03-30 22:57:33 -03001131 * received regulatory rule unless the hint is coming
Luis R. Rodriguezca4ffe82010-10-20 10:18:55 -07001132 * from a Country IE and the Country IE had no information
1133 * about a band. The IEEE 802.11 spec allows for an AP
1134 * to send only a subset of the regulatory rules allowed,
1135 * so an AP in the US that only supports 2.4 GHz may only send
1136 * a country IE with information for the 2.4 GHz band
1137 * while 5 GHz is still supported.
1138 */
1139 if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE &&
Johannes Berg361c9c82012-12-06 15:57:14 +01001140 PTR_ERR(reg_rule) == -ERANGE)
Luis R. Rodriguezca4ffe82010-10-20 10:18:55 -07001141 return;
1142
Luis R. Rodriguezcc493e4f2013-11-06 17:54:44 +01001143 if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER &&
1144 request_wiphy && request_wiphy == wiphy &&
Luis R. Rodrigueza2f73b62013-11-11 22:15:29 +01001145 request_wiphy->regulatory_flags & REGULATORY_STRICT_REG) {
Luis R. Rodriguezcc493e4f2013-11-06 17:54:44 +01001146 REG_DBG_PRINT("Disabling freq %d MHz for good\n",
1147 chan->center_freq);
1148 chan->orig_flags |= IEEE80211_CHAN_DISABLED;
1149 chan->flags = chan->orig_flags;
1150 } else {
1151 REG_DBG_PRINT("Disabling freq %d MHz\n",
1152 chan->center_freq);
1153 chan->flags |= IEEE80211_CHAN_DISABLED;
1154 }
Johannes Berg8318d782008-01-24 19:38:38 +01001155 return;
Luis R. Rodriguezca4ffe82010-10-20 10:18:55 -07001156 }
Johannes Berg8318d782008-01-24 19:38:38 +01001157
Janusz Dziedzicb0dfd2e2014-02-20 13:52:16 +01001158 regd = reg_get_regdomain(wiphy);
1159 chan_reg_rule_print_dbg(regd, chan, reg_rule);
Luis R. Rodrigueze702d3c2010-10-21 19:17:04 +05301160
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07001161 power_rule = &reg_rule->power_rule;
Luis R. Rodriguez038659e2009-05-02 00:37:17 -04001162 freq_range = &reg_rule->freq_range;
1163
Janusz Dziedzic97524822014-01-30 09:52:20 +01001164 max_bandwidth_khz = freq_range->max_bandwidth_khz;
1165 /* Check if auto calculation requested */
Janusz Dziedzicb0dfd2e2014-02-20 13:52:16 +01001166 if (reg_rule->flags & NL80211_RRF_AUTO_BW)
Janusz Dziedzic97524822014-01-30 09:52:20 +01001167 max_bandwidth_khz = reg_get_max_bandwidth(regd, reg_rule);
Janusz Dziedzic97524822014-01-30 09:52:20 +01001168
1169 if (max_bandwidth_khz < MHZ_TO_KHZ(40))
Johannes Berge33e2242014-06-23 11:06:16 +02001170 bw_flags = IEEE80211_CHAN_NO_HT40;
Janusz Dziedzic97524822014-01-30 09:52:20 +01001171 if (max_bandwidth_khz < MHZ_TO_KHZ(80))
Johannes Bergc7a6ee22012-12-12 17:50:39 +01001172 bw_flags |= IEEE80211_CHAN_NO_80MHZ;
Janusz Dziedzic97524822014-01-30 09:52:20 +01001173 if (max_bandwidth_khz < MHZ_TO_KHZ(160))
Johannes Bergc7a6ee22012-12-12 17:50:39 +01001174 bw_flags |= IEEE80211_CHAN_NO_160MHZ;
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07001175
Johannes Bergc492db32012-12-06 16:29:25 +01001176 if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER &&
Luis R. Rodriguez806a9e32009-02-21 00:04:26 -05001177 request_wiphy && request_wiphy == wiphy &&
Luis R. Rodrigueza2f73b62013-11-11 22:15:29 +01001178 request_wiphy->regulatory_flags & REGULATORY_STRICT_REG) {
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -05001179 /*
Lucas De Marchi25985ed2011-03-30 22:57:33 -03001180 * This guarantees the driver's requested regulatory domain
Luis R. Rodriguezf9763762009-01-22 15:05:52 -08001181 * will always be used as a base for further regulatory
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -05001182 * settings
1183 */
Luis R. Rodriguezf9763762009-01-22 15:05:52 -08001184 chan->flags = chan->orig_flags =
Luis R. Rodriguez038659e2009-05-02 00:37:17 -04001185 map_regdom_flags(reg_rule->flags) | bw_flags;
Luis R. Rodriguezf9763762009-01-22 15:05:52 -08001186 chan->max_antenna_gain = chan->orig_mag =
1187 (int) MBI_TO_DBI(power_rule->max_antenna_gain);
Felix Fietkau279f0f52012-10-17 13:56:20 +02001188 chan->max_reg_power = chan->max_power = chan->orig_mpwr =
Luis R. Rodriguezf9763762009-01-22 15:05:52 -08001189 (int) MBM_TO_DBM(power_rule->max_eirp);
Janusz Dziedzic4f267c12014-04-09 13:47:12 +02001190
1191 if (chan->flags & IEEE80211_CHAN_RADAR) {
1192 chan->dfs_cac_ms = IEEE80211_DFS_MIN_CAC_TIME_MS;
1193 if (reg_rule->dfs_cac_ms)
1194 chan->dfs_cac_ms = reg_rule->dfs_cac_ms;
1195 }
1196
Luis R. Rodriguezf9763762009-01-22 15:05:52 -08001197 return;
1198 }
1199
Simon Wunderlich04f39042013-02-08 18:16:19 +01001200 chan->dfs_state = NL80211_DFS_USABLE;
1201 chan->dfs_state_entered = jiffies;
1202
Rajkumar Manoharanaa3d7ee2011-09-14 14:28:17 +05301203 chan->beacon_found = false;
Luis R. Rodriguez038659e2009-05-02 00:37:17 -04001204 chan->flags = flags | bw_flags | map_regdom_flags(reg_rule->flags);
Johannes Berg1a919312012-12-03 17:21:11 +01001205 chan->max_antenna_gain =
1206 min_t(int, chan->orig_mag,
1207 MBI_TO_DBI(power_rule->max_antenna_gain));
Hong Wueccc0682012-01-11 20:33:39 +02001208 chan->max_reg_power = (int) MBM_TO_DBM(power_rule->max_eirp);
Janusz Dziedzic089027e2014-02-21 19:46:12 +01001209
1210 if (chan->flags & IEEE80211_CHAN_RADAR) {
1211 if (reg_rule->dfs_cac_ms)
1212 chan->dfs_cac_ms = reg_rule->dfs_cac_ms;
1213 else
1214 chan->dfs_cac_ms = IEEE80211_DFS_MIN_CAC_TIME_MS;
1215 }
1216
Stanislaw Gruszka5e31fc02012-07-24 08:35:39 +02001217 if (chan->orig_mpwr) {
1218 /*
Luis R. Rodrigueza09a85a2013-11-11 22:15:30 +01001219 * Devices that use REGULATORY_COUNTRY_IE_FOLLOW_POWER
1220 * will always follow the passed country IE power settings.
Stanislaw Gruszka5e31fc02012-07-24 08:35:39 +02001221 */
1222 if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE &&
Luis R. Rodrigueza09a85a2013-11-11 22:15:30 +01001223 wiphy->regulatory_flags & REGULATORY_COUNTRY_IE_FOLLOW_POWER)
Stanislaw Gruszka5e31fc02012-07-24 08:35:39 +02001224 chan->max_power = chan->max_reg_power;
1225 else
1226 chan->max_power = min(chan->orig_mpwr,
1227 chan->max_reg_power);
1228 } else
1229 chan->max_power = chan->max_reg_power;
Johannes Berg8318d782008-01-24 19:38:38 +01001230}
1231
Luis R. Rodriguez7ca43d02010-10-20 10:18:53 -07001232static void handle_band(struct wiphy *wiphy,
Johannes Bergfdc9d7b2012-12-03 18:36:09 +01001233 enum nl80211_reg_initiator initiator,
1234 struct ieee80211_supported_band *sband)
Johannes Berg8318d782008-01-24 19:38:38 +01001235{
Luis R. Rodrigueza92a3ce2009-01-07 17:43:33 -08001236 unsigned int i;
Luis R. Rodrigueza92a3ce2009-01-07 17:43:33 -08001237
Johannes Bergfdc9d7b2012-12-03 18:36:09 +01001238 if (!sband)
1239 return;
Johannes Berg8318d782008-01-24 19:38:38 +01001240
1241 for (i = 0; i < sband->n_channels; i++)
Johannes Bergfdc9d7b2012-12-03 18:36:09 +01001242 handle_channel(wiphy, initiator, &sband->channels[i]);
Johannes Berg8318d782008-01-24 19:38:38 +01001243}
1244
Luis R. Rodriguez57b5ce02012-07-12 11:49:18 -07001245static bool reg_request_cell_base(struct regulatory_request *request)
1246{
1247 if (request->initiator != NL80211_REGDOM_SET_BY_USER)
1248 return false;
Johannes Berg1a919312012-12-03 17:21:11 +01001249 return request->user_reg_hint_type == NL80211_USER_REG_HINT_CELL_BASE;
Luis R. Rodriguez57b5ce02012-07-12 11:49:18 -07001250}
1251
1252bool reg_last_request_cell_base(void)
1253{
Johannes Berg38fd2142013-05-10 19:17:17 +02001254 return reg_request_cell_base(get_last_request());
Luis R. Rodriguez57b5ce02012-07-12 11:49:18 -07001255}
1256
Ilan Peer94fc6612014-02-23 09:13:00 +02001257#ifdef CONFIG_CFG80211_REG_CELLULAR_HINTS
Luis R. Rodriguez57b5ce02012-07-12 11:49:18 -07001258/* Core specific check */
Johannes Berg2f922122012-12-03 17:54:55 +01001259static enum reg_request_treatment
1260reg_ignore_cell_hint(struct regulatory_request *pending_request)
Luis R. Rodriguez57b5ce02012-07-12 11:49:18 -07001261{
Johannes Bergc492db32012-12-06 16:29:25 +01001262 struct regulatory_request *lr = get_last_request();
Luis R. Rodriguez57b5ce02012-07-12 11:49:18 -07001263
Luis R. Rodriguez57b5ce02012-07-12 11:49:18 -07001264 if (!reg_num_devs_support_basehint)
Johannes Berg2f922122012-12-03 17:54:55 +01001265 return REG_REQ_IGNORE;
Luis R. Rodriguez57b5ce02012-07-12 11:49:18 -07001266
Johannes Bergc492db32012-12-06 16:29:25 +01001267 if (reg_request_cell_base(lr) &&
Johannes Berg1a919312012-12-03 17:21:11 +01001268 !regdom_changes(pending_request->alpha2))
Johannes Berg2f922122012-12-03 17:54:55 +01001269 return REG_REQ_ALREADY_SET;
Johannes Berg1a919312012-12-03 17:21:11 +01001270
Johannes Berg2f922122012-12-03 17:54:55 +01001271 return REG_REQ_OK;
Luis R. Rodriguez57b5ce02012-07-12 11:49:18 -07001272}
1273
1274/* Device specific check */
1275static bool reg_dev_ignore_cell_hint(struct wiphy *wiphy)
1276{
Johannes Berg1a919312012-12-03 17:21:11 +01001277 return !(wiphy->features & NL80211_FEATURE_CELL_BASE_REG_HINTS);
Luis R. Rodriguez57b5ce02012-07-12 11:49:18 -07001278}
1279#else
1280static int reg_ignore_cell_hint(struct regulatory_request *pending_request)
1281{
Johannes Berg2f922122012-12-03 17:54:55 +01001282 return REG_REQ_IGNORE;
Luis R. Rodriguez57b5ce02012-07-12 11:49:18 -07001283}
Johannes Berg1a919312012-12-03 17:21:11 +01001284
1285static bool reg_dev_ignore_cell_hint(struct wiphy *wiphy)
Luis R. Rodriguez57b5ce02012-07-12 11:49:18 -07001286{
1287 return true;
1288}
1289#endif
1290
Luis R. Rodriguezfa1fb9c2013-10-02 18:33:10 -07001291static bool wiphy_strict_alpha2_regd(struct wiphy *wiphy)
1292{
Luis R. Rodrigueza2f73b62013-11-11 22:15:29 +01001293 if (wiphy->regulatory_flags & REGULATORY_STRICT_REG &&
1294 !(wiphy->regulatory_flags & REGULATORY_CUSTOM_REG))
Luis R. Rodriguezfa1fb9c2013-10-02 18:33:10 -07001295 return true;
1296 return false;
1297}
Luis R. Rodriguez57b5ce02012-07-12 11:49:18 -07001298
Luis R. Rodriguez7db90f42009-03-09 22:07:41 -04001299static bool ignore_reg_update(struct wiphy *wiphy,
1300 enum nl80211_reg_initiator initiator)
Luis R. Rodriguez14b98152008-11-12 14:22:03 -08001301{
Johannes Bergc492db32012-12-06 16:29:25 +01001302 struct regulatory_request *lr = get_last_request();
1303
Jonathan Doronb0d7aa52014-12-15 19:26:00 +02001304 if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED)
1305 return true;
1306
Johannes Bergc492db32012-12-06 16:29:25 +01001307 if (!lr) {
Luis R. Rodriguez034c6d62013-10-14 17:42:06 -07001308 REG_DBG_PRINT("Ignoring regulatory request set by %s "
1309 "since last_request is not set\n",
Luis R. Rodriguez926a0a02010-10-21 19:17:03 +05301310 reg_initiator_name(initiator));
Luis R. Rodriguez14b98152008-11-12 14:22:03 -08001311 return true;
Luis R. Rodriguez926a0a02010-10-21 19:17:03 +05301312 }
1313
Luis R. Rodriguez7db90f42009-03-09 22:07:41 -04001314 if (initiator == NL80211_REGDOM_SET_BY_CORE &&
Luis R. Rodrigueza2f73b62013-11-11 22:15:29 +01001315 wiphy->regulatory_flags & REGULATORY_CUSTOM_REG) {
Luis R. Rodriguez034c6d62013-10-14 17:42:06 -07001316 REG_DBG_PRINT("Ignoring regulatory request set by %s "
1317 "since the driver uses its own custom "
1318 "regulatory domain\n",
Luis R. Rodriguez926a0a02010-10-21 19:17:03 +05301319 reg_initiator_name(initiator));
Luis R. Rodriguez14b98152008-11-12 14:22:03 -08001320 return true;
Luis R. Rodriguez926a0a02010-10-21 19:17:03 +05301321 }
1322
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -05001323 /*
1324 * wiphy->regd will be set once the device has its own
1325 * desired regulatory domain set
1326 */
Luis R. Rodriguezfa1fb9c2013-10-02 18:33:10 -07001327 if (wiphy_strict_alpha2_regd(wiphy) && !wiphy->regd &&
Luis R. Rodriguez749b5272010-10-20 10:18:54 -07001328 initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE &&
Johannes Bergc492db32012-12-06 16:29:25 +01001329 !is_world_regdom(lr->alpha2)) {
Luis R. Rodriguez034c6d62013-10-14 17:42:06 -07001330 REG_DBG_PRINT("Ignoring regulatory request set by %s "
1331 "since the driver requires its own regulatory "
1332 "domain to be set first\n",
Luis R. Rodriguez926a0a02010-10-21 19:17:03 +05301333 reg_initiator_name(initiator));
Luis R. Rodriguez14b98152008-11-12 14:22:03 -08001334 return true;
Luis R. Rodriguez926a0a02010-10-21 19:17:03 +05301335 }
1336
Johannes Bergc492db32012-12-06 16:29:25 +01001337 if (reg_request_cell_base(lr))
Luis R. Rodriguez57b5ce02012-07-12 11:49:18 -07001338 return reg_dev_ignore_cell_hint(wiphy);
1339
Luis R. Rodriguez14b98152008-11-12 14:22:03 -08001340 return false;
1341}
1342
Luis R. Rodriguez3195e482012-12-19 10:53:03 -08001343static bool reg_is_world_roaming(struct wiphy *wiphy)
1344{
1345 const struct ieee80211_regdomain *cr = get_cfg80211_regdom();
1346 const struct ieee80211_regdomain *wr = get_wiphy_regdom(wiphy);
1347 struct regulatory_request *lr = get_last_request();
1348
1349 if (is_world_regdom(cr->alpha2) || (wr && is_world_regdom(wr->alpha2)))
1350 return true;
1351
1352 if (lr && lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE &&
Luis R. Rodrigueza2f73b62013-11-11 22:15:29 +01001353 wiphy->regulatory_flags & REGULATORY_CUSTOM_REG)
Luis R. Rodriguez3195e482012-12-19 10:53:03 -08001354 return true;
1355
1356 return false;
1357}
1358
Johannes Berg1a919312012-12-03 17:21:11 +01001359static void handle_reg_beacon(struct wiphy *wiphy, unsigned int chan_idx,
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05001360 struct reg_beacon *reg_beacon)
1361{
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05001362 struct ieee80211_supported_band *sband;
1363 struct ieee80211_channel *chan;
Luis R. Rodriguez6bad8762009-04-02 14:08:09 -04001364 bool channel_changed = false;
1365 struct ieee80211_channel chan_before;
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05001366
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05001367 sband = wiphy->bands[reg_beacon->chan.band];
1368 chan = &sband->channels[chan_idx];
1369
1370 if (likely(chan->center_freq != reg_beacon->chan.center_freq))
1371 return;
1372
Luis R. Rodriguez6bad8762009-04-02 14:08:09 -04001373 if (chan->beacon_found)
1374 return;
1375
1376 chan->beacon_found = true;
1377
Luis R. Rodriguez0f500a52012-12-19 10:53:04 -08001378 if (!reg_is_world_roaming(wiphy))
1379 return;
1380
Luis R. Rodrigueza2f73b62013-11-11 22:15:29 +01001381 if (wiphy->regulatory_flags & REGULATORY_DISABLE_BEACON_HINTS)
Luis R. Rodriguez37184242009-07-30 17:43:48 -07001382 return;
1383
Luis R. Rodriguez6bad8762009-04-02 14:08:09 -04001384 chan_before.center_freq = chan->center_freq;
1385 chan_before.flags = chan->flags;
1386
Luis R. Rodriguez8fe02e12013-10-21 19:22:25 +02001387 if (chan->flags & IEEE80211_CHAN_NO_IR) {
1388 chan->flags &= ~IEEE80211_CHAN_NO_IR;
Luis R. Rodriguez6bad8762009-04-02 14:08:09 -04001389 channel_changed = true;
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05001390 }
1391
Luis R. Rodriguez6bad8762009-04-02 14:08:09 -04001392 if (channel_changed)
1393 nl80211_send_beacon_hint_event(wiphy, &chan_before, chan);
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05001394}
1395
1396/*
1397 * Called when a scan on a wiphy finds a beacon on
1398 * new channel
1399 */
1400static void wiphy_update_new_beacon(struct wiphy *wiphy,
1401 struct reg_beacon *reg_beacon)
1402{
1403 unsigned int i;
1404 struct ieee80211_supported_band *sband;
1405
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05001406 if (!wiphy->bands[reg_beacon->chan.band])
1407 return;
1408
1409 sband = wiphy->bands[reg_beacon->chan.band];
1410
1411 for (i = 0; i < sband->n_channels; i++)
1412 handle_reg_beacon(wiphy, i, reg_beacon);
1413}
1414
1415/*
1416 * Called upon reg changes or a new wiphy is added
1417 */
1418static void wiphy_update_beacon_reg(struct wiphy *wiphy)
1419{
1420 unsigned int i;
1421 struct ieee80211_supported_band *sband;
1422 struct reg_beacon *reg_beacon;
1423
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05001424 list_for_each_entry(reg_beacon, &reg_beacon_list, list) {
1425 if (!wiphy->bands[reg_beacon->chan.band])
1426 continue;
1427 sband = wiphy->bands[reg_beacon->chan.band];
1428 for (i = 0; i < sband->n_channels; i++)
1429 handle_reg_beacon(wiphy, i, reg_beacon);
1430 }
1431}
1432
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05001433/* Reap the advantages of previously found beacons */
1434static void reg_process_beacons(struct wiphy *wiphy)
1435{
Luis R. Rodriguezb1ed8dd2009-05-02 00:34:15 -04001436 /*
1437 * Means we are just firing up cfg80211, so no beacons would
1438 * have been processed yet.
1439 */
1440 if (!last_request)
1441 return;
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05001442 wiphy_update_beacon_reg(wiphy);
1443}
1444
Johannes Berg1a919312012-12-03 17:21:11 +01001445static bool is_ht40_allowed(struct ieee80211_channel *chan)
Luis R. Rodriguez038659e2009-05-02 00:37:17 -04001446{
1447 if (!chan)
Johannes Berg1a919312012-12-03 17:21:11 +01001448 return false;
Luis R. Rodriguez038659e2009-05-02 00:37:17 -04001449 if (chan->flags & IEEE80211_CHAN_DISABLED)
Johannes Berg1a919312012-12-03 17:21:11 +01001450 return false;
Luis R. Rodriguez038659e2009-05-02 00:37:17 -04001451 /* This would happen when regulatory rules disallow HT40 completely */
Felix Fietkau55b183a2013-01-11 14:22:58 +01001452 if ((chan->flags & IEEE80211_CHAN_NO_HT40) == IEEE80211_CHAN_NO_HT40)
1453 return false;
1454 return true;
Luis R. Rodriguez038659e2009-05-02 00:37:17 -04001455}
1456
1457static void reg_process_ht_flags_channel(struct wiphy *wiphy,
Johannes Bergfdc9d7b2012-12-03 18:36:09 +01001458 struct ieee80211_channel *channel)
Luis R. Rodriguez038659e2009-05-02 00:37:17 -04001459{
Johannes Bergfdc9d7b2012-12-03 18:36:09 +01001460 struct ieee80211_supported_band *sband = wiphy->bands[channel->band];
Luis R. Rodriguez038659e2009-05-02 00:37:17 -04001461 struct ieee80211_channel *channel_before = NULL, *channel_after = NULL;
1462 unsigned int i;
1463
Johannes Berg1a919312012-12-03 17:21:11 +01001464 if (!is_ht40_allowed(channel)) {
Luis R. Rodriguez038659e2009-05-02 00:37:17 -04001465 channel->flags |= IEEE80211_CHAN_NO_HT40;
1466 return;
1467 }
1468
1469 /*
1470 * We need to ensure the extension channels exist to
1471 * be able to use HT40- or HT40+, this finds them (or not)
1472 */
1473 for (i = 0; i < sband->n_channels; i++) {
1474 struct ieee80211_channel *c = &sband->channels[i];
Johannes Berg1a919312012-12-03 17:21:11 +01001475
Luis R. Rodriguez038659e2009-05-02 00:37:17 -04001476 if (c->center_freq == (channel->center_freq - 20))
1477 channel_before = c;
1478 if (c->center_freq == (channel->center_freq + 20))
1479 channel_after = c;
1480 }
1481
1482 /*
1483 * Please note that this assumes target bandwidth is 20 MHz,
1484 * if that ever changes we also need to change the below logic
1485 * to include that as well.
1486 */
Johannes Berg1a919312012-12-03 17:21:11 +01001487 if (!is_ht40_allowed(channel_before))
Luis R. Rodriguez689da1b2009-05-02 00:37:18 -04001488 channel->flags |= IEEE80211_CHAN_NO_HT40MINUS;
Luis R. Rodriguez038659e2009-05-02 00:37:17 -04001489 else
Luis R. Rodriguez689da1b2009-05-02 00:37:18 -04001490 channel->flags &= ~IEEE80211_CHAN_NO_HT40MINUS;
Luis R. Rodriguez038659e2009-05-02 00:37:17 -04001491
Johannes Berg1a919312012-12-03 17:21:11 +01001492 if (!is_ht40_allowed(channel_after))
Luis R. Rodriguez689da1b2009-05-02 00:37:18 -04001493 channel->flags |= IEEE80211_CHAN_NO_HT40PLUS;
Luis R. Rodriguez038659e2009-05-02 00:37:17 -04001494 else
Luis R. Rodriguez689da1b2009-05-02 00:37:18 -04001495 channel->flags &= ~IEEE80211_CHAN_NO_HT40PLUS;
Luis R. Rodriguez038659e2009-05-02 00:37:17 -04001496}
1497
1498static void reg_process_ht_flags_band(struct wiphy *wiphy,
Johannes Bergfdc9d7b2012-12-03 18:36:09 +01001499 struct ieee80211_supported_band *sband)
Luis R. Rodriguez038659e2009-05-02 00:37:17 -04001500{
1501 unsigned int i;
Luis R. Rodriguez038659e2009-05-02 00:37:17 -04001502
Johannes Bergfdc9d7b2012-12-03 18:36:09 +01001503 if (!sband)
1504 return;
Luis R. Rodriguez038659e2009-05-02 00:37:17 -04001505
1506 for (i = 0; i < sband->n_channels; i++)
Johannes Bergfdc9d7b2012-12-03 18:36:09 +01001507 reg_process_ht_flags_channel(wiphy, &sband->channels[i]);
Luis R. Rodriguez038659e2009-05-02 00:37:17 -04001508}
1509
1510static void reg_process_ht_flags(struct wiphy *wiphy)
1511{
1512 enum ieee80211_band band;
1513
1514 if (!wiphy)
1515 return;
1516
Johannes Bergfdc9d7b2012-12-03 18:36:09 +01001517 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
1518 reg_process_ht_flags_band(wiphy, wiphy->bands[band]);
Luis R. Rodriguez038659e2009-05-02 00:37:17 -04001519}
1520
Luis R. Rodriguez0e3802d2013-11-05 09:18:12 -08001521static void reg_call_notifier(struct wiphy *wiphy,
1522 struct regulatory_request *request)
1523{
1524 if (wiphy->reg_notifier)
1525 wiphy->reg_notifier(wiphy, request);
1526}
1527
Arik Nemtsovad932f02014-11-27 09:44:55 +02001528static bool reg_wdev_chan_valid(struct wiphy *wiphy, struct wireless_dev *wdev)
1529{
Arik Nemtsovad932f02014-11-27 09:44:55 +02001530 struct cfg80211_chan_def chandef;
1531 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
Arik Nemtsov20658702014-12-29 11:59:59 +02001532 enum nl80211_iftype iftype;
Arik Nemtsovad932f02014-11-27 09:44:55 +02001533
1534 wdev_lock(wdev);
Arik Nemtsov20658702014-12-29 11:59:59 +02001535 iftype = wdev->iftype;
Arik Nemtsovad932f02014-11-27 09:44:55 +02001536
Arik Nemtsov20658702014-12-29 11:59:59 +02001537 /* make sure the interface is active */
Arik Nemtsovad932f02014-11-27 09:44:55 +02001538 if (!wdev->netdev || !netif_running(wdev->netdev))
Arik Nemtsov20658702014-12-29 11:59:59 +02001539 goto wdev_inactive_unlock;
Arik Nemtsovad932f02014-11-27 09:44:55 +02001540
Arik Nemtsov20658702014-12-29 11:59:59 +02001541 switch (iftype) {
Arik Nemtsovad932f02014-11-27 09:44:55 +02001542 case NL80211_IFTYPE_AP:
1543 case NL80211_IFTYPE_P2P_GO:
1544 if (!wdev->beacon_interval)
Arik Nemtsov20658702014-12-29 11:59:59 +02001545 goto wdev_inactive_unlock;
1546 chandef = wdev->chandef;
Arik Nemtsovad932f02014-11-27 09:44:55 +02001547 break;
Arik Nemtsov185076d2014-12-03 18:08:17 +02001548 case NL80211_IFTYPE_ADHOC:
1549 if (!wdev->ssid_len)
Arik Nemtsov20658702014-12-29 11:59:59 +02001550 goto wdev_inactive_unlock;
1551 chandef = wdev->chandef;
Arik Nemtsov185076d2014-12-03 18:08:17 +02001552 break;
Arik Nemtsovad932f02014-11-27 09:44:55 +02001553 case NL80211_IFTYPE_STATION:
1554 case NL80211_IFTYPE_P2P_CLIENT:
Arik Nemtsovad932f02014-11-27 09:44:55 +02001555 if (!wdev->current_bss ||
1556 !wdev->current_bss->pub.channel)
Arik Nemtsov20658702014-12-29 11:59:59 +02001557 goto wdev_inactive_unlock;
Arik Nemtsovad932f02014-11-27 09:44:55 +02001558
Arik Nemtsov20658702014-12-29 11:59:59 +02001559 if (!rdev->ops->get_channel ||
1560 rdev_get_channel(rdev, wdev, &chandef))
1561 cfg80211_chandef_create(&chandef,
1562 wdev->current_bss->pub.channel,
1563 NL80211_CHAN_NO_HT);
Arik Nemtsovad932f02014-11-27 09:44:55 +02001564 break;
1565 case NL80211_IFTYPE_MONITOR:
1566 case NL80211_IFTYPE_AP_VLAN:
1567 case NL80211_IFTYPE_P2P_DEVICE:
1568 /* no enforcement required */
1569 break;
1570 default:
1571 /* others not implemented for now */
1572 WARN_ON(1);
1573 break;
1574 }
1575
Arik Nemtsovad932f02014-11-27 09:44:55 +02001576 wdev_unlock(wdev);
Arik Nemtsov20658702014-12-29 11:59:59 +02001577
1578 switch (iftype) {
1579 case NL80211_IFTYPE_AP:
1580 case NL80211_IFTYPE_P2P_GO:
1581 case NL80211_IFTYPE_ADHOC:
1582 return cfg80211_reg_can_beacon(wiphy, &chandef, iftype);
1583 case NL80211_IFTYPE_STATION:
1584 case NL80211_IFTYPE_P2P_CLIENT:
1585 return cfg80211_chandef_usable(wiphy, &chandef,
1586 IEEE80211_CHAN_DISABLED);
1587 default:
1588 break;
1589 }
1590
1591 return true;
1592
1593wdev_inactive_unlock:
1594 wdev_unlock(wdev);
1595 return true;
Arik Nemtsovad932f02014-11-27 09:44:55 +02001596}
1597
1598static void reg_leave_invalid_chans(struct wiphy *wiphy)
1599{
1600 struct wireless_dev *wdev;
1601 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
1602
1603 ASSERT_RTNL();
1604
1605 list_for_each_entry(wdev, &rdev->wdev_list, list)
1606 if (!reg_wdev_chan_valid(wiphy, wdev))
1607 cfg80211_leave(rdev, wdev);
1608}
1609
1610static void reg_check_chans_work(struct work_struct *work)
1611{
1612 struct cfg80211_registered_device *rdev;
1613
1614 REG_DBG_PRINT("Verifying active interfaces after reg change\n");
1615 rtnl_lock();
1616
1617 list_for_each_entry(rdev, &cfg80211_rdev_list, list)
1618 if (!(rdev->wiphy.regulatory_flags &
1619 REGULATORY_IGNORE_STALE_KICKOFF))
1620 reg_leave_invalid_chans(&rdev->wiphy);
1621
1622 rtnl_unlock();
1623}
1624
1625static void reg_check_channels(void)
1626{
1627 /*
1628 * Give usermode a chance to do something nicer (move to another
1629 * channel, orderly disconnection), before forcing a disconnection.
1630 */
1631 mod_delayed_work(system_power_efficient_wq,
1632 &reg_check_chans,
1633 msecs_to_jiffies(REG_ENFORCE_GRACE_MS));
1634}
1635
Sven Neumanneac03e32011-08-30 23:38:53 +02001636static void wiphy_update_regulatory(struct wiphy *wiphy,
1637 enum nl80211_reg_initiator initiator)
Johannes Berg8318d782008-01-24 19:38:38 +01001638{
1639 enum ieee80211_band band;
Johannes Bergc492db32012-12-06 16:29:25 +01001640 struct regulatory_request *lr = get_last_request();
Sven Neumanneac03e32011-08-30 23:38:53 +02001641
Luis R. Rodriguez0e3802d2013-11-05 09:18:12 -08001642 if (ignore_reg_update(wiphy, initiator)) {
1643 /*
1644 * Regulatory updates set by CORE are ignored for custom
1645 * regulatory cards. Let us notify the changes to the driver,
1646 * as some drivers used this to restore its orig_* reg domain.
1647 */
1648 if (initiator == NL80211_REGDOM_SET_BY_CORE &&
Luis R. Rodrigueza2f73b62013-11-11 22:15:29 +01001649 wiphy->regulatory_flags & REGULATORY_CUSTOM_REG)
Luis R. Rodriguez0e3802d2013-11-05 09:18:12 -08001650 reg_call_notifier(wiphy, lr);
Sven Neumanna203c2a2011-07-12 15:52:07 +02001651 return;
Luis R. Rodriguez0e3802d2013-11-05 09:18:12 -08001652 }
Sven Neumanna203c2a2011-07-12 15:52:07 +02001653
Johannes Bergc492db32012-12-06 16:29:25 +01001654 lr->dfs_region = get_cfg80211_regdom()->dfs_region;
Luis R. Rodriguezb68e6b32011-10-11 10:59:03 -07001655
Johannes Bergfdc9d7b2012-12-03 18:36:09 +01001656 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
1657 handle_band(wiphy, initiator, wiphy->bands[band]);
Sven Neumanna203c2a2011-07-12 15:52:07 +02001658
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05001659 reg_process_beacons(wiphy);
Luis R. Rodriguez038659e2009-05-02 00:37:17 -04001660 reg_process_ht_flags(wiphy);
Luis R. Rodriguez0e3802d2013-11-05 09:18:12 -08001661 reg_call_notifier(wiphy, lr);
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07001662}
1663
Sven Neumannd7549cb2011-08-30 23:38:54 +02001664static void update_all_wiphy_regulatory(enum nl80211_reg_initiator initiator)
1665{
1666 struct cfg80211_registered_device *rdev;
Rajkumar Manoharan4a389942011-12-08 23:59:26 +05301667 struct wiphy *wiphy;
Sven Neumannd7549cb2011-08-30 23:38:54 +02001668
Johannes Berg5fe231e2013-05-08 21:45:15 +02001669 ASSERT_RTNL();
Johannes Berg458f4f92012-12-06 15:47:38 +01001670
Rajkumar Manoharan4a389942011-12-08 23:59:26 +05301671 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
1672 wiphy = &rdev->wiphy;
1673 wiphy_update_regulatory(wiphy, initiator);
Rajkumar Manoharan4a389942011-12-08 23:59:26 +05301674 }
Arik Nemtsovad932f02014-11-27 09:44:55 +02001675
1676 reg_check_channels();
Sven Neumannd7549cb2011-08-30 23:38:54 +02001677}
1678
Luis R. Rodriguez1fa25e42009-01-22 15:05:44 -08001679static void handle_channel_custom(struct wiphy *wiphy,
Johannes Bergfdc9d7b2012-12-03 18:36:09 +01001680 struct ieee80211_channel *chan,
Luis R. Rodriguez1fa25e42009-01-22 15:05:44 -08001681 const struct ieee80211_regdomain *regd)
1682{
Luis R. Rodriguez038659e2009-05-02 00:37:17 -04001683 u32 bw_flags = 0;
Luis R. Rodriguez1fa25e42009-01-22 15:05:44 -08001684 const struct ieee80211_reg_rule *reg_rule = NULL;
1685 const struct ieee80211_power_rule *power_rule = NULL;
Luis R. Rodriguez038659e2009-05-02 00:37:17 -04001686 const struct ieee80211_freq_range *freq_range = NULL;
Janusz Dziedzic97524822014-01-30 09:52:20 +01001687 u32 max_bandwidth_khz;
Luis R. Rodriguez1fa25e42009-01-22 15:05:44 -08001688
Johannes Berg361c9c82012-12-06 15:57:14 +01001689 reg_rule = freq_reg_info_regd(wiphy, MHZ_TO_KHZ(chan->center_freq),
1690 regd);
Luis R. Rodriguezac46d482009-05-01 18:44:50 -04001691
Johannes Berg361c9c82012-12-06 15:57:14 +01001692 if (IS_ERR(reg_rule)) {
Johannes Bergfe7ef5e2012-12-04 15:07:34 +01001693 REG_DBG_PRINT("Disabling freq %d MHz as custom regd has no rule that fits it\n",
1694 chan->center_freq);
Arik Nemtsovdb8dfee2014-12-15 19:26:02 +02001695 if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) {
1696 chan->flags |= IEEE80211_CHAN_DISABLED;
1697 } else {
1698 chan->orig_flags |= IEEE80211_CHAN_DISABLED;
1699 chan->flags = chan->orig_flags;
1700 }
Luis R. Rodriguez1fa25e42009-01-22 15:05:44 -08001701 return;
1702 }
1703
Janusz Dziedzicb0dfd2e2014-02-20 13:52:16 +01001704 chan_reg_rule_print_dbg(regd, chan, reg_rule);
Luis R. Rodrigueze702d3c2010-10-21 19:17:04 +05301705
Luis R. Rodriguez1fa25e42009-01-22 15:05:44 -08001706 power_rule = &reg_rule->power_rule;
Luis R. Rodriguez038659e2009-05-02 00:37:17 -04001707 freq_range = &reg_rule->freq_range;
Luis R. Rodriguez1fa25e42009-01-22 15:05:44 -08001708
Janusz Dziedzic97524822014-01-30 09:52:20 +01001709 max_bandwidth_khz = freq_range->max_bandwidth_khz;
1710 /* Check if auto calculation requested */
Janusz Dziedzicb0dfd2e2014-02-20 13:52:16 +01001711 if (reg_rule->flags & NL80211_RRF_AUTO_BW)
Janusz Dziedzic97524822014-01-30 09:52:20 +01001712 max_bandwidth_khz = reg_get_max_bandwidth(regd, reg_rule);
1713
1714 if (max_bandwidth_khz < MHZ_TO_KHZ(40))
Johannes Berge33e2242014-06-23 11:06:16 +02001715 bw_flags = IEEE80211_CHAN_NO_HT40;
Janusz Dziedzic97524822014-01-30 09:52:20 +01001716 if (max_bandwidth_khz < MHZ_TO_KHZ(80))
Johannes Bergc7a6ee22012-12-12 17:50:39 +01001717 bw_flags |= IEEE80211_CHAN_NO_80MHZ;
Janusz Dziedzic97524822014-01-30 09:52:20 +01001718 if (max_bandwidth_khz < MHZ_TO_KHZ(160))
Johannes Bergc7a6ee22012-12-12 17:50:39 +01001719 bw_flags |= IEEE80211_CHAN_NO_160MHZ;
Luis R. Rodriguez038659e2009-05-02 00:37:17 -04001720
Arik Nemtsov2e18b382014-11-16 16:37:46 +02001721 chan->dfs_state_entered = jiffies;
Arik Nemtsovc7ab5082014-11-16 16:37:47 +02001722 chan->dfs_state = NL80211_DFS_USABLE;
1723
1724 chan->beacon_found = false;
Arik Nemtsovdb8dfee2014-12-15 19:26:02 +02001725
1726 if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED)
1727 chan->flags = chan->orig_flags | bw_flags |
1728 map_regdom_flags(reg_rule->flags);
1729 else
1730 chan->flags |= map_regdom_flags(reg_rule->flags) | bw_flags;
1731
Luis R. Rodriguez1fa25e42009-01-22 15:05:44 -08001732 chan->max_antenna_gain = (int) MBI_TO_DBI(power_rule->max_antenna_gain);
Felix Fietkau279f0f52012-10-17 13:56:20 +02001733 chan->max_reg_power = chan->max_power =
1734 (int) MBM_TO_DBM(power_rule->max_eirp);
Arik Nemtsov2e18b382014-11-16 16:37:46 +02001735
1736 if (chan->flags & IEEE80211_CHAN_RADAR) {
1737 if (reg_rule->dfs_cac_ms)
1738 chan->dfs_cac_ms = reg_rule->dfs_cac_ms;
1739 else
1740 chan->dfs_cac_ms = IEEE80211_DFS_MIN_CAC_TIME_MS;
1741 }
1742
1743 chan->max_power = chan->max_reg_power;
Luis R. Rodriguez1fa25e42009-01-22 15:05:44 -08001744}
1745
Johannes Bergfdc9d7b2012-12-03 18:36:09 +01001746static void handle_band_custom(struct wiphy *wiphy,
1747 struct ieee80211_supported_band *sband,
Luis R. Rodriguez1fa25e42009-01-22 15:05:44 -08001748 const struct ieee80211_regdomain *regd)
1749{
1750 unsigned int i;
Luis R. Rodriguez1fa25e42009-01-22 15:05:44 -08001751
Johannes Bergfdc9d7b2012-12-03 18:36:09 +01001752 if (!sband)
1753 return;
Luis R. Rodriguez1fa25e42009-01-22 15:05:44 -08001754
1755 for (i = 0; i < sband->n_channels; i++)
Johannes Bergfdc9d7b2012-12-03 18:36:09 +01001756 handle_channel_custom(wiphy, &sband->channels[i], regd);
Luis R. Rodriguez1fa25e42009-01-22 15:05:44 -08001757}
1758
1759/* Used by drivers prior to wiphy registration */
1760void wiphy_apply_custom_regulatory(struct wiphy *wiphy,
1761 const struct ieee80211_regdomain *regd)
1762{
1763 enum ieee80211_band band;
Luis R. Rodriguezbbcf3f02009-05-19 17:49:47 -04001764 unsigned int bands_set = 0;
Luis R. Rodriguezac46d482009-05-01 18:44:50 -04001765
Luis R. Rodrigueza2f73b62013-11-11 22:15:29 +01001766 WARN(!(wiphy->regulatory_flags & REGULATORY_CUSTOM_REG),
1767 "wiphy should have REGULATORY_CUSTOM_REG\n");
1768 wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG;
Luis R. Rodriguez222ea582013-11-05 09:18:00 -08001769
Luis R. Rodriguez1fa25e42009-01-22 15:05:44 -08001770 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
Luis R. Rodriguezbbcf3f02009-05-19 17:49:47 -04001771 if (!wiphy->bands[band])
1772 continue;
Johannes Bergfdc9d7b2012-12-03 18:36:09 +01001773 handle_band_custom(wiphy, wiphy->bands[band], regd);
Luis R. Rodriguezbbcf3f02009-05-19 17:49:47 -04001774 bands_set++;
Luis R. Rodriguez1fa25e42009-01-22 15:05:44 -08001775 }
Luis R. Rodriguezbbcf3f02009-05-19 17:49:47 -04001776
1777 /*
1778 * no point in calling this if it won't have any effect
Johannes Berg1a919312012-12-03 17:21:11 +01001779 * on your device's supported bands.
Luis R. Rodriguezbbcf3f02009-05-19 17:49:47 -04001780 */
1781 WARN_ON(!bands_set);
Luis R. Rodriguez1fa25e42009-01-22 15:05:44 -08001782}
1783EXPORT_SYMBOL(wiphy_apply_custom_regulatory);
1784
Luis R. Rodriguezb2e253c2010-11-17 21:46:09 -08001785static void reg_set_request_processed(void)
1786{
1787 bool need_more_processing = false;
Johannes Bergc492db32012-12-06 16:29:25 +01001788 struct regulatory_request *lr = get_last_request();
Luis R. Rodriguezb2e253c2010-11-17 21:46:09 -08001789
Johannes Bergc492db32012-12-06 16:29:25 +01001790 lr->processed = true;
Luis R. Rodriguezb2e253c2010-11-17 21:46:09 -08001791
1792 spin_lock(&reg_requests_lock);
1793 if (!list_empty(&reg_requests_list))
1794 need_more_processing = true;
1795 spin_unlock(&reg_requests_lock);
1796
Ilan peereeca9fc2015-03-04 00:32:07 -05001797 cancel_delayed_work(&reg_timeout);
Luis R. Rodrigueza90c7a32011-04-05 10:49:04 -07001798
Luis R. Rodriguezb2e253c2010-11-17 21:46:09 -08001799 if (need_more_processing)
1800 schedule_work(&reg_work);
1801}
1802
Luis R. Rodriguezd1c96a92009-02-21 00:24:13 -05001803/**
Luis R. Rodriguezb3eb7f32013-11-05 09:18:03 -08001804 * reg_process_hint_core - process core regulatory requests
1805 * @pending_request: a pending core regulatory request
1806 *
1807 * The wireless subsystem can use this function to process
1808 * a regulatory request issued by the regulatory core.
1809 *
1810 * Returns one of the different reg request treatment values.
1811 */
1812static enum reg_request_treatment
1813reg_process_hint_core(struct regulatory_request *core_request)
1814{
Luis R. Rodriguezb3eb7f32013-11-05 09:18:03 -08001815
1816 core_request->intersect = false;
1817 core_request->processed = false;
Luis R. Rodriguez5ad6ef52013-11-05 09:18:08 -08001818
Luis R. Rodriguez05f1a3e2013-11-05 09:18:09 -08001819 reg_update_last_request(core_request);
Luis R. Rodriguezb3eb7f32013-11-05 09:18:03 -08001820
Luis R. Rodriguezfe6631f2013-11-05 09:18:10 -08001821 return reg_call_crda(core_request);
Luis R. Rodriguezb3eb7f32013-11-05 09:18:03 -08001822}
1823
Luis R. Rodriguez0d97a612013-11-05 09:18:04 -08001824static enum reg_request_treatment
1825__reg_process_hint_user(struct regulatory_request *user_request)
1826{
1827 struct regulatory_request *lr = get_last_request();
1828
1829 if (reg_request_cell_base(user_request))
1830 return reg_ignore_cell_hint(user_request);
1831
1832 if (reg_request_cell_base(lr))
1833 return REG_REQ_IGNORE;
1834
1835 if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE)
1836 return REG_REQ_INTERSECT;
1837 /*
1838 * If the user knows better the user should set the regdom
1839 * to their country before the IE is picked up
1840 */
1841 if (lr->initiator == NL80211_REGDOM_SET_BY_USER &&
1842 lr->intersect)
1843 return REG_REQ_IGNORE;
1844 /*
1845 * Process user requests only after previous user/driver/core
1846 * requests have been processed
1847 */
1848 if ((lr->initiator == NL80211_REGDOM_SET_BY_CORE ||
1849 lr->initiator == NL80211_REGDOM_SET_BY_DRIVER ||
1850 lr->initiator == NL80211_REGDOM_SET_BY_USER) &&
1851 regdom_changes(lr->alpha2))
1852 return REG_REQ_IGNORE;
1853
1854 if (!regdom_changes(user_request->alpha2))
1855 return REG_REQ_ALREADY_SET;
1856
1857 return REG_REQ_OK;
1858}
1859
1860/**
1861 * reg_process_hint_user - process user regulatory requests
1862 * @user_request: a pending user regulatory request
1863 *
1864 * The wireless subsystem can use this function to process
1865 * a regulatory request initiated by userspace.
1866 *
1867 * Returns one of the different reg request treatment values.
1868 */
1869static enum reg_request_treatment
1870reg_process_hint_user(struct regulatory_request *user_request)
1871{
1872 enum reg_request_treatment treatment;
Luis R. Rodriguez0d97a612013-11-05 09:18:04 -08001873
1874 treatment = __reg_process_hint_user(user_request);
1875 if (treatment == REG_REQ_IGNORE ||
Ilan peer0c4ddcd2015-03-04 00:32:05 -05001876 treatment == REG_REQ_ALREADY_SET) {
Arik Nemtsovc8883932014-04-21 20:39:34 -07001877 reg_free_request(user_request);
Luis R. Rodriguez0d97a612013-11-05 09:18:04 -08001878 return treatment;
1879 }
1880
Luis R. Rodriguez0d97a612013-11-05 09:18:04 -08001881 user_request->intersect = treatment == REG_REQ_INTERSECT;
1882 user_request->processed = false;
Luis R. Rodriguez5ad6ef52013-11-05 09:18:08 -08001883
Luis R. Rodriguez05f1a3e2013-11-05 09:18:09 -08001884 reg_update_last_request(user_request);
Luis R. Rodriguez0d97a612013-11-05 09:18:04 -08001885
1886 user_alpha2[0] = user_request->alpha2[0];
1887 user_alpha2[1] = user_request->alpha2[1];
1888
Luis R. Rodriguezfe6631f2013-11-05 09:18:10 -08001889 return reg_call_crda(user_request);
Luis R. Rodriguez0d97a612013-11-05 09:18:04 -08001890}
1891
Luis R. Rodriguez21636c72013-11-05 09:18:05 -08001892static enum reg_request_treatment
1893__reg_process_hint_driver(struct regulatory_request *driver_request)
1894{
1895 struct regulatory_request *lr = get_last_request();
1896
1897 if (lr->initiator == NL80211_REGDOM_SET_BY_CORE) {
1898 if (regdom_changes(driver_request->alpha2))
1899 return REG_REQ_OK;
1900 return REG_REQ_ALREADY_SET;
1901 }
1902
1903 /*
1904 * This would happen if you unplug and plug your card
1905 * back in or if you add a new device for which the previously
1906 * loaded card also agrees on the regulatory domain.
1907 */
1908 if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER &&
1909 !regdom_changes(driver_request->alpha2))
1910 return REG_REQ_ALREADY_SET;
1911
1912 return REG_REQ_INTERSECT;
1913}
1914
1915/**
1916 * reg_process_hint_driver - process driver regulatory requests
1917 * @driver_request: a pending driver regulatory request
1918 *
1919 * The wireless subsystem can use this function to process
1920 * a regulatory request issued by an 802.11 driver.
1921 *
1922 * Returns one of the different reg request treatment values.
1923 */
1924static enum reg_request_treatment
1925reg_process_hint_driver(struct wiphy *wiphy,
1926 struct regulatory_request *driver_request)
1927{
Arik Nemtsov34f05f52014-12-04 12:22:16 +02001928 const struct ieee80211_regdomain *regd, *tmp;
Luis R. Rodriguez21636c72013-11-05 09:18:05 -08001929 enum reg_request_treatment treatment;
Luis R. Rodriguez21636c72013-11-05 09:18:05 -08001930
1931 treatment = __reg_process_hint_driver(driver_request);
1932
1933 switch (treatment) {
1934 case REG_REQ_OK:
1935 break;
1936 case REG_REQ_IGNORE:
Arik Nemtsovc8883932014-04-21 20:39:34 -07001937 reg_free_request(driver_request);
Luis R. Rodriguez21636c72013-11-05 09:18:05 -08001938 return treatment;
1939 case REG_REQ_INTERSECT:
1940 /* fall through */
1941 case REG_REQ_ALREADY_SET:
1942 regd = reg_copy_regd(get_cfg80211_regdom());
1943 if (IS_ERR(regd)) {
Arik Nemtsovc8883932014-04-21 20:39:34 -07001944 reg_free_request(driver_request);
Luis R. Rodriguez21636c72013-11-05 09:18:05 -08001945 return REG_REQ_IGNORE;
1946 }
Arik Nemtsov34f05f52014-12-04 12:22:16 +02001947
1948 tmp = get_wiphy_regdom(wiphy);
Luis R. Rodriguez21636c72013-11-05 09:18:05 -08001949 rcu_assign_pointer(wiphy->regd, regd);
Arik Nemtsov34f05f52014-12-04 12:22:16 +02001950 rcu_free_regdom(tmp);
Luis R. Rodriguez21636c72013-11-05 09:18:05 -08001951 }
1952
Luis R. Rodriguez21636c72013-11-05 09:18:05 -08001953
1954 driver_request->intersect = treatment == REG_REQ_INTERSECT;
1955 driver_request->processed = false;
Luis R. Rodriguez5ad6ef52013-11-05 09:18:08 -08001956
Luis R. Rodriguez05f1a3e2013-11-05 09:18:09 -08001957 reg_update_last_request(driver_request);
Luis R. Rodriguez21636c72013-11-05 09:18:05 -08001958
1959 /*
1960 * Since CRDA will not be called in this case as we already
1961 * have applied the requested regulatory domain before we just
1962 * inform userspace we have processed the request
1963 */
1964 if (treatment == REG_REQ_ALREADY_SET) {
1965 nl80211_send_reg_change_event(driver_request);
1966 reg_set_request_processed();
1967 return treatment;
1968 }
1969
Luis R. Rodriguezfe6631f2013-11-05 09:18:10 -08001970 return reg_call_crda(driver_request);
Luis R. Rodriguez21636c72013-11-05 09:18:05 -08001971}
1972
Luis R. Rodriguezb23e7a92013-11-05 09:18:06 -08001973static enum reg_request_treatment
1974__reg_process_hint_country_ie(struct wiphy *wiphy,
1975 struct regulatory_request *country_ie_request)
1976{
1977 struct wiphy *last_wiphy = NULL;
1978 struct regulatory_request *lr = get_last_request();
1979
1980 if (reg_request_cell_base(lr)) {
1981 /* Trust a Cell base station over the AP's country IE */
1982 if (regdom_changes(country_ie_request->alpha2))
1983 return REG_REQ_IGNORE;
1984 return REG_REQ_ALREADY_SET;
Luis R. Rodriguez2a901462013-11-11 22:15:31 +01001985 } else {
1986 if (wiphy->regulatory_flags & REGULATORY_COUNTRY_IE_IGNORE)
1987 return REG_REQ_IGNORE;
Luis R. Rodriguezb23e7a92013-11-05 09:18:06 -08001988 }
1989
Luis R. Rodriguezb23e7a92013-11-05 09:18:06 -08001990 if (unlikely(!is_an_alpha2(country_ie_request->alpha2)))
1991 return -EINVAL;
Luis R. Rodriguez2f1c6c52013-11-05 09:18:07 -08001992
1993 if (lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE)
1994 return REG_REQ_OK;
1995
1996 last_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx);
1997
1998 if (last_wiphy != wiphy) {
Luis R. Rodriguezb23e7a92013-11-05 09:18:06 -08001999 /*
Luis R. Rodriguez2f1c6c52013-11-05 09:18:07 -08002000 * Two cards with two APs claiming different
2001 * Country IE alpha2s. We could
2002 * intersect them, but that seems unlikely
2003 * to be correct. Reject second one for now.
Luis R. Rodriguezb23e7a92013-11-05 09:18:06 -08002004 */
Luis R. Rodriguez2f1c6c52013-11-05 09:18:07 -08002005 if (regdom_changes(country_ie_request->alpha2))
2006 return REG_REQ_IGNORE;
Luis R. Rodriguezb23e7a92013-11-05 09:18:06 -08002007 return REG_REQ_ALREADY_SET;
2008 }
Emmanuel Grumbach70dcec52014-12-02 09:53:25 +02002009
2010 if (regdom_changes(country_ie_request->alpha2))
Luis R. Rodriguez2f1c6c52013-11-05 09:18:07 -08002011 return REG_REQ_OK;
2012 return REG_REQ_ALREADY_SET;
Luis R. Rodriguezb23e7a92013-11-05 09:18:06 -08002013}
2014
Luis R. Rodriguezb3eb7f32013-11-05 09:18:03 -08002015/**
Luis R. Rodriguezb23e7a92013-11-05 09:18:06 -08002016 * reg_process_hint_country_ie - process regulatory requests from country IEs
2017 * @country_ie_request: a regulatory request from a country IE
Luis R. Rodriguezd1c96a92009-02-21 00:24:13 -05002018 *
Luis R. Rodriguezb23e7a92013-11-05 09:18:06 -08002019 * The wireless subsystem can use this function to process
2020 * a regulatory request issued by a country Information Element.
Luis R. Rodriguezd1c96a92009-02-21 00:24:13 -05002021 *
Johannes Berg2f922122012-12-03 17:54:55 +01002022 * Returns one of the different reg request treatment values.
Luis R. Rodriguezd1c96a92009-02-21 00:24:13 -05002023 */
Johannes Berg2f922122012-12-03 17:54:55 +01002024static enum reg_request_treatment
Luis R. Rodriguezb23e7a92013-11-05 09:18:06 -08002025reg_process_hint_country_ie(struct wiphy *wiphy,
2026 struct regulatory_request *country_ie_request)
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002027{
Johannes Berg2f922122012-12-03 17:54:55 +01002028 enum reg_request_treatment treatment;
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002029
Luis R. Rodriguezb23e7a92013-11-05 09:18:06 -08002030 treatment = __reg_process_hint_country_ie(wiphy, country_ie_request);
Luis R. Rodriguez761cf7e2009-02-21 00:04:25 -05002031
Johannes Berg2f922122012-12-03 17:54:55 +01002032 switch (treatment) {
Johannes Berg2f922122012-12-03 17:54:55 +01002033 case REG_REQ_OK:
2034 break;
Luis R. Rodriguezb23e7a92013-11-05 09:18:06 -08002035 case REG_REQ_IGNORE:
2036 /* fall through */
2037 case REG_REQ_ALREADY_SET:
Arik Nemtsovc8883932014-04-21 20:39:34 -07002038 reg_free_request(country_ie_request);
Johannes Berg2f922122012-12-03 17:54:55 +01002039 return treatment;
Luis R. Rodriguezb23e7a92013-11-05 09:18:06 -08002040 case REG_REQ_INTERSECT:
Arik Nemtsovc8883932014-04-21 20:39:34 -07002041 reg_free_request(country_ie_request);
Luis R. Rodriguezb23e7a92013-11-05 09:18:06 -08002042 /*
2043 * This doesn't happen yet, not sure we
2044 * ever want to support it for this case.
2045 */
2046 WARN_ONCE(1, "Unexpected intersection for country IEs");
2047 return REG_REQ_IGNORE;
Luis R. Rodriguez3e0c3ff2009-01-07 17:43:34 -08002048 }
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002049
Luis R. Rodriguezb23e7a92013-11-05 09:18:06 -08002050 country_ie_request->intersect = false;
2051 country_ie_request->processed = false;
Luis R. Rodriguez5ad6ef52013-11-05 09:18:08 -08002052
Luis R. Rodriguez05f1a3e2013-11-05 09:18:09 -08002053 reg_update_last_request(country_ie_request);
Luis R. Rodriguezd951c1d2009-02-21 00:24:15 -05002054
Luis R. Rodriguezfe6631f2013-11-05 09:18:10 -08002055 return reg_call_crda(country_ie_request);
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002056}
2057
Luis R. Rodriguez30a548c2009-05-02 01:17:27 -04002058/* This processes *all* regulatory hints */
Luis R. Rodriguez1daa37c2013-11-05 09:18:02 -08002059static void reg_process_hint(struct regulatory_request *reg_request)
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002060{
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002061 struct wiphy *wiphy = NULL;
Luis R. Rodriguezb3eb7f32013-11-05 09:18:03 -08002062 enum reg_request_treatment treatment;
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002063
Johannes Bergf4173762012-12-03 18:23:37 +01002064 if (reg_request->wiphy_idx != WIPHY_IDX_INVALID)
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002065 wiphy = wiphy_idx_to_wiphy(reg_request->wiphy_idx);
2066
Luis R. Rodriguezb3eb7f32013-11-05 09:18:03 -08002067 switch (reg_request->initiator) {
2068 case NL80211_REGDOM_SET_BY_CORE:
2069 reg_process_hint_core(reg_request);
2070 return;
2071 case NL80211_REGDOM_SET_BY_USER:
Luis R. Rodriguez0d97a612013-11-05 09:18:04 -08002072 treatment = reg_process_hint_user(reg_request);
Inbal Hacohen50c11eb2014-02-12 09:32:27 +02002073 if (treatment == REG_REQ_IGNORE ||
Ilan peer0c4ddcd2015-03-04 00:32:05 -05002074 treatment == REG_REQ_ALREADY_SET)
Luis R. Rodriguez0d97a612013-11-05 09:18:04 -08002075 return;
Luis R. Rodriguez0d97a612013-11-05 09:18:04 -08002076 return;
Luis R. Rodriguezb3eb7f32013-11-05 09:18:03 -08002077 case NL80211_REGDOM_SET_BY_DRIVER:
Ilan Peer772f0382014-01-14 15:17:23 +02002078 if (!wiphy)
2079 goto out_free;
Luis R. Rodriguez21636c72013-11-05 09:18:05 -08002080 treatment = reg_process_hint_driver(wiphy, reg_request);
2081 break;
Luis R. Rodriguezb3eb7f32013-11-05 09:18:03 -08002082 case NL80211_REGDOM_SET_BY_COUNTRY_IE:
Ilan Peer772f0382014-01-14 15:17:23 +02002083 if (!wiphy)
2084 goto out_free;
Luis R. Rodriguezb23e7a92013-11-05 09:18:06 -08002085 treatment = reg_process_hint_country_ie(wiphy, reg_request);
Luis R. Rodriguezb3eb7f32013-11-05 09:18:03 -08002086 break;
2087 default:
2088 WARN(1, "invalid initiator %d\n", reg_request->initiator);
Ilan Peer772f0382014-01-14 15:17:23 +02002089 goto out_free;
Luis R. Rodriguezb3eb7f32013-11-05 09:18:03 -08002090 }
2091
Luis R. Rodriguezb23e7a92013-11-05 09:18:06 -08002092 /* This is required so that the orig_* parameters are saved */
2093 if (treatment == REG_REQ_ALREADY_SET && wiphy &&
Arik Nemtsovad932f02014-11-27 09:44:55 +02002094 wiphy->regulatory_flags & REGULATORY_STRICT_REG) {
Luis R. Rodriguezb23e7a92013-11-05 09:18:06 -08002095 wiphy_update_regulatory(wiphy, reg_request->initiator);
Arik Nemtsovad932f02014-11-27 09:44:55 +02002096 reg_check_channels();
2097 }
Ilan Peer772f0382014-01-14 15:17:23 +02002098
2099 return;
2100
2101out_free:
Arik Nemtsovc8883932014-04-21 20:39:34 -07002102 reg_free_request(reg_request);
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002103}
2104
Arik Nemtsovef51fb12015-01-07 16:47:20 +02002105static bool reg_only_self_managed_wiphys(void)
2106{
2107 struct cfg80211_registered_device *rdev;
2108 struct wiphy *wiphy;
2109 bool self_managed_found = false;
2110
2111 ASSERT_RTNL();
2112
2113 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
2114 wiphy = &rdev->wiphy;
2115 if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED)
2116 self_managed_found = true;
2117 else
2118 return false;
2119 }
2120
2121 /* make sure at least one self-managed wiphy exists */
2122 return self_managed_found;
2123}
2124
Luis R. Rodriguezb2e253c2010-11-17 21:46:09 -08002125/*
2126 * Processes regulatory hints, this is all the NL80211_REGDOM_SET_BY_*
2127 * Regulatory hints come on a first come first serve basis and we
2128 * must process each one atomically.
2129 */
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002130static void reg_process_pending_hints(void)
Luis R. Rodriguezb0e28802010-11-17 21:46:08 -08002131{
Johannes Bergc492db32012-12-06 16:29:25 +01002132 struct regulatory_request *reg_request, *lr;
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002133
Johannes Bergc492db32012-12-06 16:29:25 +01002134 lr = get_last_request();
Luis R. Rodriguezb0e28802010-11-17 21:46:08 -08002135
Luis R. Rodriguezb2e253c2010-11-17 21:46:09 -08002136 /* When last_request->processed becomes true this will be rescheduled */
Johannes Bergc492db32012-12-06 16:29:25 +01002137 if (lr && !lr->processed) {
Luis R. Rodriguez96cce122014-04-21 20:39:35 -07002138 reg_process_hint(lr);
Johannes Berg5fe231e2013-05-08 21:45:15 +02002139 return;
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002140 }
Luis R. Rodriguezb2e253c2010-11-17 21:46:09 -08002141
2142 spin_lock(&reg_requests_lock);
2143
2144 if (list_empty(&reg_requests_list)) {
2145 spin_unlock(&reg_requests_lock);
Johannes Berg5fe231e2013-05-08 21:45:15 +02002146 return;
Luis R. Rodriguezb2e253c2010-11-17 21:46:09 -08002147 }
2148
2149 reg_request = list_first_entry(&reg_requests_list,
2150 struct regulatory_request,
2151 list);
2152 list_del_init(&reg_request->list);
2153
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002154 spin_unlock(&reg_requests_lock);
Luis R. Rodriguezb0e28802010-11-17 21:46:08 -08002155
Arik Nemtsovef51fb12015-01-07 16:47:20 +02002156 if (reg_only_self_managed_wiphys()) {
2157 reg_free_request(reg_request);
2158 return;
2159 }
2160
Luis R. Rodriguez1daa37c2013-11-05 09:18:02 -08002161 reg_process_hint(reg_request);
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002162}
2163
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05002164/* Processes beacon hints -- this has nothing to do with country IEs */
2165static void reg_process_pending_beacon_hints(void)
2166{
Johannes Berg79c97e92009-07-07 03:56:12 +02002167 struct cfg80211_registered_device *rdev;
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05002168 struct reg_beacon *pending_beacon, *tmp;
2169
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05002170 /* This goes through the _pending_ beacon list */
2171 spin_lock_bh(&reg_pending_beacons_lock);
2172
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05002173 list_for_each_entry_safe(pending_beacon, tmp,
2174 &reg_pending_beacons, list) {
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05002175 list_del_init(&pending_beacon->list);
2176
2177 /* Applies the beacon hint to current wiphys */
Johannes Berg79c97e92009-07-07 03:56:12 +02002178 list_for_each_entry(rdev, &cfg80211_rdev_list, list)
2179 wiphy_update_new_beacon(&rdev->wiphy, pending_beacon);
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05002180
2181 /* Remembers the beacon hint for new wiphys or reg changes */
2182 list_add_tail(&pending_beacon->list, &reg_beacon_list);
2183 }
2184
2185 spin_unlock_bh(&reg_pending_beacons_lock);
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05002186}
2187
Jonathan Doronb0d7aa52014-12-15 19:26:00 +02002188static void reg_process_self_managed_hints(void)
2189{
2190 struct cfg80211_registered_device *rdev;
2191 struct wiphy *wiphy;
2192 const struct ieee80211_regdomain *tmp;
2193 const struct ieee80211_regdomain *regd;
2194 enum ieee80211_band band;
2195 struct regulatory_request request = {};
2196
2197 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
2198 wiphy = &rdev->wiphy;
2199
2200 spin_lock(&reg_requests_lock);
2201 regd = rdev->requested_regd;
2202 rdev->requested_regd = NULL;
2203 spin_unlock(&reg_requests_lock);
2204
2205 if (regd == NULL)
2206 continue;
2207
2208 tmp = get_wiphy_regdom(wiphy);
2209 rcu_assign_pointer(wiphy->regd, regd);
2210 rcu_free_regdom(tmp);
2211
2212 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
2213 handle_band_custom(wiphy, wiphy->bands[band], regd);
2214
2215 reg_process_ht_flags(wiphy);
2216
2217 request.wiphy_idx = get_wiphy_idx(wiphy);
2218 request.alpha2[0] = regd->alpha2[0];
2219 request.alpha2[1] = regd->alpha2[1];
2220 request.initiator = NL80211_REGDOM_SET_BY_DRIVER;
2221
2222 nl80211_send_wiphy_reg_change_event(&request);
2223 }
2224
2225 reg_check_channels();
2226}
2227
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002228static void reg_todo(struct work_struct *work)
2229{
Johannes Berg5fe231e2013-05-08 21:45:15 +02002230 rtnl_lock();
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002231 reg_process_pending_hints();
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05002232 reg_process_pending_beacon_hints();
Jonathan Doronb0d7aa52014-12-15 19:26:00 +02002233 reg_process_self_managed_hints();
Johannes Berg5fe231e2013-05-08 21:45:15 +02002234 rtnl_unlock();
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002235}
2236
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002237static void queue_regulatory_request(struct regulatory_request *request)
2238{
Johannes Bergd4f2c882012-12-03 18:59:58 +01002239 request->alpha2[0] = toupper(request->alpha2[0]);
2240 request->alpha2[1] = toupper(request->alpha2[1]);
John W. Linvillec61029c2010-08-05 14:26:24 -04002241
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002242 spin_lock(&reg_requests_lock);
2243 list_add_tail(&request->list, &reg_requests_list);
2244 spin_unlock(&reg_requests_lock);
2245
2246 schedule_work(&reg_work);
2247}
2248
Luis R. Rodriguez09d989d2010-01-29 19:58:57 -05002249/*
2250 * Core regulatory hint -- happens during cfg80211_init()
2251 * and when we restore regulatory settings.
2252 */
Luis R. Rodriguezba25c142009-02-21 00:04:23 -05002253static int regulatory_hint_core(const char *alpha2)
2254{
2255 struct regulatory_request *request;
2256
Johannes Berg1a919312012-12-03 17:21:11 +01002257 request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL);
Luis R. Rodriguezba25c142009-02-21 00:04:23 -05002258 if (!request)
2259 return -ENOMEM;
2260
2261 request->alpha2[0] = alpha2[0];
2262 request->alpha2[1] = alpha2[1];
Luis R. Rodriguez7db90f42009-03-09 22:07:41 -04002263 request->initiator = NL80211_REGDOM_SET_BY_CORE;
Luis R. Rodriguezba25c142009-02-21 00:04:23 -05002264
Luis R. Rodriguez31e99722010-11-17 21:46:06 -08002265 queue_regulatory_request(request);
Luis R. Rodriguez5078b2e2009-05-13 17:04:42 -04002266
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002267 return 0;
Luis R. Rodriguezba25c142009-02-21 00:04:23 -05002268}
2269
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002270/* User hints */
Luis R. Rodriguez57b5ce02012-07-12 11:49:18 -07002271int regulatory_hint_user(const char *alpha2,
2272 enum nl80211_user_reg_hint_type user_reg_hint_type)
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002273{
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002274 struct regulatory_request *request;
2275
Johannes Bergfdc9d7b2012-12-03 18:36:09 +01002276 if (WARN_ON(!alpha2))
2277 return -EINVAL;
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002278
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002279 request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL);
2280 if (!request)
2281 return -ENOMEM;
2282
Johannes Bergf4173762012-12-03 18:23:37 +01002283 request->wiphy_idx = WIPHY_IDX_INVALID;
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002284 request->alpha2[0] = alpha2[0];
2285 request->alpha2[1] = alpha2[1];
Luis R. Rodrigueze12822e2010-01-04 11:37:39 -05002286 request->initiator = NL80211_REGDOM_SET_BY_USER;
Luis R. Rodriguez57b5ce02012-07-12 11:49:18 -07002287 request->user_reg_hint_type = user_reg_hint_type;
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002288
2289 queue_regulatory_request(request);
2290
2291 return 0;
2292}
2293
Ilan peer05050752015-03-04 00:32:06 -05002294int regulatory_hint_indoor(bool is_indoor, u32 portid)
Ilan Peer52616f22014-02-25 16:26:00 +02002295{
Ilan peer05050752015-03-04 00:32:06 -05002296 spin_lock(&reg_indoor_lock);
Ilan Peer52616f22014-02-25 16:26:00 +02002297
Ilan peer05050752015-03-04 00:32:06 -05002298 /* It is possible that more than one user space process is trying to
2299 * configure the indoor setting. To handle such cases, clear the indoor
2300 * setting in case that some process does not think that the device
2301 * is operating in an indoor environment. In addition, if a user space
2302 * process indicates that it is controlling the indoor setting, save its
2303 * portid, i.e., make it the owner.
2304 */
2305 reg_is_indoor = is_indoor;
2306 if (reg_is_indoor) {
2307 if (!reg_is_indoor_portid)
2308 reg_is_indoor_portid = portid;
2309 } else {
2310 reg_is_indoor_portid = 0;
2311 }
Ilan Peer52616f22014-02-25 16:26:00 +02002312
Ilan peer05050752015-03-04 00:32:06 -05002313 spin_unlock(&reg_indoor_lock);
2314
2315 if (!is_indoor)
2316 reg_check_channels();
Ilan Peer52616f22014-02-25 16:26:00 +02002317
2318 return 0;
2319}
2320
Ilan peer05050752015-03-04 00:32:06 -05002321void regulatory_netlink_notify(u32 portid)
2322{
2323 spin_lock(&reg_indoor_lock);
2324
2325 if (reg_is_indoor_portid != portid) {
2326 spin_unlock(&reg_indoor_lock);
2327 return;
2328 }
2329
2330 reg_is_indoor = false;
2331 reg_is_indoor_portid = 0;
2332
2333 spin_unlock(&reg_indoor_lock);
2334
2335 reg_check_channels();
2336}
2337
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002338/* Driver hints */
2339int regulatory_hint(struct wiphy *wiphy, const char *alpha2)
2340{
2341 struct regulatory_request *request;
2342
Johannes Bergfdc9d7b2012-12-03 18:36:09 +01002343 if (WARN_ON(!alpha2 || !wiphy))
2344 return -EINVAL;
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002345
Luis R. Rodriguez4f7b9142013-12-14 20:09:06 +01002346 wiphy->regulatory_flags &= ~REGULATORY_CUSTOM_REG;
2347
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002348 request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL);
2349 if (!request)
2350 return -ENOMEM;
2351
2352 request->wiphy_idx = get_wiphy_idx(wiphy);
2353
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002354 request->alpha2[0] = alpha2[0];
2355 request->alpha2[1] = alpha2[1];
Luis R. Rodriguez7db90f42009-03-09 22:07:41 -04002356 request->initiator = NL80211_REGDOM_SET_BY_DRIVER;
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002357
2358 queue_regulatory_request(request);
2359
2360 return 0;
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002361}
2362EXPORT_SYMBOL(regulatory_hint);
2363
Luis R. Rodriguez789fd032013-10-04 18:07:24 -07002364void regulatory_hint_country_ie(struct wiphy *wiphy, enum ieee80211_band band,
2365 const u8 *country_ie, u8 country_ie_len)
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -08002366{
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -08002367 char alpha2[2];
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -08002368 enum environment_cap env = ENVIRON_ANY;
Johannes Bergdb2424c2013-05-10 19:07:52 +02002369 struct regulatory_request *request = NULL, *lr;
Luis R. Rodriguezd335fe62009-02-21 00:04:27 -05002370
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -08002371 /* IE len must be evenly divisible by 2 */
2372 if (country_ie_len & 0x01)
Johannes Bergdb2424c2013-05-10 19:07:52 +02002373 return;
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -08002374
2375 if (country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
Johannes Bergdb2424c2013-05-10 19:07:52 +02002376 return;
2377
2378 request = kzalloc(sizeof(*request), GFP_KERNEL);
2379 if (!request)
2380 return;
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -08002381
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -08002382 alpha2[0] = country_ie[0];
2383 alpha2[1] = country_ie[1];
2384
2385 if (country_ie[2] == 'I')
2386 env = ENVIRON_INDOOR;
2387 else if (country_ie[2] == 'O')
2388 env = ENVIRON_OUTDOOR;
2389
Johannes Bergdb2424c2013-05-10 19:07:52 +02002390 rcu_read_lock();
2391 lr = get_last_request();
2392
2393 if (unlikely(!lr))
2394 goto out;
2395
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -05002396 /*
Luis R. Rodriguez8b19e6c2009-07-30 17:38:09 -07002397 * We will run this only upon a successful connection on cfg80211.
Luis R. Rodriguez4b44c8b2009-07-30 17:38:07 -07002398 * We leave conflict resolution to the workqueue, where can hold
Johannes Berg5fe231e2013-05-08 21:45:15 +02002399 * the RTNL.
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -05002400 */
Johannes Bergc492db32012-12-06 16:29:25 +01002401 if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE &&
2402 lr->wiphy_idx != WIPHY_IDX_INVALID)
Luis R. Rodriguez4b44c8b2009-07-30 17:38:07 -07002403 goto out;
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -08002404
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002405 request->wiphy_idx = get_wiphy_idx(wiphy);
John W. Linville4f366c52010-07-15 14:57:33 -04002406 request->alpha2[0] = alpha2[0];
2407 request->alpha2[1] = alpha2[1];
Luis R. Rodriguez7db90f42009-03-09 22:07:41 -04002408 request->initiator = NL80211_REGDOM_SET_BY_COUNTRY_IE;
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002409 request->country_ie_env = env;
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -08002410
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002411 queue_regulatory_request(request);
Johannes Bergdb2424c2013-05-10 19:07:52 +02002412 request = NULL;
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -08002413out:
Johannes Bergdb2424c2013-05-10 19:07:52 +02002414 kfree(request);
2415 rcu_read_unlock();
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -08002416}
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002417
Luis R. Rodriguez09d989d2010-01-29 19:58:57 -05002418static void restore_alpha2(char *alpha2, bool reset_user)
2419{
2420 /* indicates there is no alpha2 to consider for restoration */
2421 alpha2[0] = '9';
2422 alpha2[1] = '7';
2423
2424 /* The user setting has precedence over the module parameter */
2425 if (is_user_regdom_saved()) {
2426 /* Unless we're asked to ignore it and reset it */
2427 if (reset_user) {
Johannes Berg1a919312012-12-03 17:21:11 +01002428 REG_DBG_PRINT("Restoring regulatory settings including user preference\n");
Luis R. Rodriguez09d989d2010-01-29 19:58:57 -05002429 user_alpha2[0] = '9';
2430 user_alpha2[1] = '7';
2431
2432 /*
2433 * If we're ignoring user settings, we still need to
2434 * check the module parameter to ensure we put things
2435 * back as they were for a full restore.
2436 */
2437 if (!is_world_regdom(ieee80211_regdom)) {
Johannes Berg1a919312012-12-03 17:21:11 +01002438 REG_DBG_PRINT("Keeping preference on module parameter ieee80211_regdom: %c%c\n",
2439 ieee80211_regdom[0], ieee80211_regdom[1]);
Luis R. Rodriguez09d989d2010-01-29 19:58:57 -05002440 alpha2[0] = ieee80211_regdom[0];
2441 alpha2[1] = ieee80211_regdom[1];
2442 }
2443 } else {
Johannes Berg1a919312012-12-03 17:21:11 +01002444 REG_DBG_PRINT("Restoring regulatory settings while preserving user preference for: %c%c\n",
2445 user_alpha2[0], user_alpha2[1]);
Luis R. Rodriguez09d989d2010-01-29 19:58:57 -05002446 alpha2[0] = user_alpha2[0];
2447 alpha2[1] = user_alpha2[1];
2448 }
2449 } else if (!is_world_regdom(ieee80211_regdom)) {
Johannes Berg1a919312012-12-03 17:21:11 +01002450 REG_DBG_PRINT("Keeping preference on module parameter ieee80211_regdom: %c%c\n",
2451 ieee80211_regdom[0], ieee80211_regdom[1]);
Luis R. Rodriguez09d989d2010-01-29 19:58:57 -05002452 alpha2[0] = ieee80211_regdom[0];
2453 alpha2[1] = ieee80211_regdom[1];
2454 } else
Luis R. Rodriguezd91e41b2010-10-20 10:18:59 -07002455 REG_DBG_PRINT("Restoring regulatory settings\n");
Luis R. Rodriguez09d989d2010-01-29 19:58:57 -05002456}
2457
Rajkumar Manoharan5ce543d2011-12-07 21:50:08 +05302458static void restore_custom_reg_settings(struct wiphy *wiphy)
2459{
2460 struct ieee80211_supported_band *sband;
2461 enum ieee80211_band band;
2462 struct ieee80211_channel *chan;
2463 int i;
2464
2465 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
2466 sband = wiphy->bands[band];
2467 if (!sband)
2468 continue;
2469 for (i = 0; i < sband->n_channels; i++) {
2470 chan = &sband->channels[i];
2471 chan->flags = chan->orig_flags;
2472 chan->max_antenna_gain = chan->orig_mag;
2473 chan->max_power = chan->orig_mpwr;
Paul Stewart899852a2012-08-01 16:54:42 -07002474 chan->beacon_found = false;
Rajkumar Manoharan5ce543d2011-12-07 21:50:08 +05302475 }
2476 }
2477}
2478
Luis R. Rodriguez09d989d2010-01-29 19:58:57 -05002479/*
2480 * Restoring regulatory settings involves ingoring any
2481 * possibly stale country IE information and user regulatory
2482 * settings if so desired, this includes any beacon hints
2483 * learned as we could have traveled outside to another country
2484 * after disconnection. To restore regulatory settings we do
2485 * exactly what we did at bootup:
2486 *
2487 * - send a core regulatory hint
2488 * - send a user regulatory hint if applicable
2489 *
2490 * Device drivers that send a regulatory hint for a specific country
2491 * keep their own regulatory domain on wiphy->regd so that does does
2492 * not need to be remembered.
2493 */
2494static void restore_regulatory_settings(bool reset_user)
2495{
2496 char alpha2[2];
Dmitry Shmidtcee0bec2011-12-19 12:32:21 -08002497 char world_alpha2[2];
Luis R. Rodriguez09d989d2010-01-29 19:58:57 -05002498 struct reg_beacon *reg_beacon, *btmp;
Luis R. Rodriguez14609552011-04-05 10:49:03 -07002499 LIST_HEAD(tmp_reg_req_list);
Rajkumar Manoharan5ce543d2011-12-07 21:50:08 +05302500 struct cfg80211_registered_device *rdev;
Luis R. Rodriguez09d989d2010-01-29 19:58:57 -05002501
Johannes Berg5fe231e2013-05-08 21:45:15 +02002502 ASSERT_RTNL();
2503
Ilan peer05050752015-03-04 00:32:06 -05002504 /*
2505 * Clear the indoor setting in case that it is not controlled by user
2506 * space, as otherwise there is no guarantee that the device is still
2507 * operating in an indoor environment.
2508 */
2509 spin_lock(&reg_indoor_lock);
2510 if (reg_is_indoor && !reg_is_indoor_portid) {
2511 reg_is_indoor = false;
2512 reg_check_channels();
2513 }
2514 spin_unlock(&reg_indoor_lock);
Ilan Peer52616f22014-02-25 16:26:00 +02002515
Johannes Berg2d319862013-01-09 12:01:38 +01002516 reset_regdomains(true, &world_regdom);
Luis R. Rodriguez09d989d2010-01-29 19:58:57 -05002517 restore_alpha2(alpha2, reset_user);
2518
Luis R. Rodriguez14609552011-04-05 10:49:03 -07002519 /*
2520 * If there's any pending requests we simply
2521 * stash them to a temporary pending queue and
2522 * add then after we've restored regulatory
2523 * settings.
2524 */
2525 spin_lock(&reg_requests_lock);
Ilan peereeca9fc2015-03-04 00:32:07 -05002526 list_splice_tail_init(&reg_requests_list, &tmp_reg_req_list);
Luis R. Rodriguez14609552011-04-05 10:49:03 -07002527 spin_unlock(&reg_requests_lock);
2528
Luis R. Rodriguez09d989d2010-01-29 19:58:57 -05002529 /* Clear beacon hints */
2530 spin_lock_bh(&reg_pending_beacons_lock);
Johannes Bergfea9bce2012-12-03 17:32:01 +01002531 list_for_each_entry_safe(reg_beacon, btmp, &reg_pending_beacons, list) {
2532 list_del(&reg_beacon->list);
2533 kfree(reg_beacon);
Luis R. Rodriguez09d989d2010-01-29 19:58:57 -05002534 }
2535 spin_unlock_bh(&reg_pending_beacons_lock);
2536
Johannes Bergfea9bce2012-12-03 17:32:01 +01002537 list_for_each_entry_safe(reg_beacon, btmp, &reg_beacon_list, list) {
2538 list_del(&reg_beacon->list);
2539 kfree(reg_beacon);
Luis R. Rodriguez09d989d2010-01-29 19:58:57 -05002540 }
2541
2542 /* First restore to the basic regulatory settings */
Johannes Berg379b82f2012-12-06 15:44:07 +01002543 world_alpha2[0] = cfg80211_world_regdom->alpha2[0];
2544 world_alpha2[1] = cfg80211_world_regdom->alpha2[1];
Luis R. Rodriguez09d989d2010-01-29 19:58:57 -05002545
Rajkumar Manoharan5ce543d2011-12-07 21:50:08 +05302546 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
Jonathan Doronb0d7aa52014-12-15 19:26:00 +02002547 if (rdev->wiphy.regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED)
2548 continue;
Luis R. Rodrigueza2f73b62013-11-11 22:15:29 +01002549 if (rdev->wiphy.regulatory_flags & REGULATORY_CUSTOM_REG)
Rajkumar Manoharan5ce543d2011-12-07 21:50:08 +05302550 restore_custom_reg_settings(&rdev->wiphy);
2551 }
2552
Dmitry Shmidtcee0bec2011-12-19 12:32:21 -08002553 regulatory_hint_core(world_alpha2);
Luis R. Rodriguez09d989d2010-01-29 19:58:57 -05002554
2555 /*
2556 * This restores the ieee80211_regdom module parameter
2557 * preference or the last user requested regulatory
2558 * settings, user regulatory settings takes precedence.
2559 */
2560 if (is_an_alpha2(alpha2))
Luis R. Rodriguez57b5ce02012-07-12 11:49:18 -07002561 regulatory_hint_user(user_alpha2, NL80211_USER_REG_HINT_USER);
Luis R. Rodriguez09d989d2010-01-29 19:58:57 -05002562
Luis R. Rodriguez14609552011-04-05 10:49:03 -07002563 spin_lock(&reg_requests_lock);
Johannes Berg11cff962012-12-03 18:56:41 +01002564 list_splice_tail_init(&tmp_reg_req_list, &reg_requests_list);
Luis R. Rodriguez14609552011-04-05 10:49:03 -07002565 spin_unlock(&reg_requests_lock);
2566
Luis R. Rodriguez14609552011-04-05 10:49:03 -07002567 REG_DBG_PRINT("Kicking the queue\n");
2568
2569 schedule_work(&reg_work);
2570}
Luis R. Rodriguez09d989d2010-01-29 19:58:57 -05002571
2572void regulatory_hint_disconnect(void)
2573{
Johannes Berg1a919312012-12-03 17:21:11 +01002574 REG_DBG_PRINT("All devices are disconnected, going to restore regulatory settings\n");
Luis R. Rodriguez09d989d2010-01-29 19:58:57 -05002575 restore_regulatory_settings(false);
2576}
2577
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05002578static bool freq_is_chan_12_13_14(u16 freq)
2579{
Bruno Randolf59eb21a2011-01-17 13:37:28 +09002580 if (freq == ieee80211_channel_to_frequency(12, IEEE80211_BAND_2GHZ) ||
2581 freq == ieee80211_channel_to_frequency(13, IEEE80211_BAND_2GHZ) ||
2582 freq == ieee80211_channel_to_frequency(14, IEEE80211_BAND_2GHZ))
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05002583 return true;
2584 return false;
2585}
2586
Luis R. Rodriguez3ebfa6e2012-12-19 10:53:02 -08002587static bool pending_reg_beacon(struct ieee80211_channel *beacon_chan)
2588{
2589 struct reg_beacon *pending_beacon;
2590
2591 list_for_each_entry(pending_beacon, &reg_pending_beacons, list)
2592 if (beacon_chan->center_freq ==
2593 pending_beacon->chan.center_freq)
2594 return true;
2595 return false;
2596}
2597
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05002598int regulatory_hint_found_beacon(struct wiphy *wiphy,
2599 struct ieee80211_channel *beacon_chan,
2600 gfp_t gfp)
2601{
2602 struct reg_beacon *reg_beacon;
Luis R. Rodriguez3ebfa6e2012-12-19 10:53:02 -08002603 bool processing;
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05002604
Johannes Berg1a919312012-12-03 17:21:11 +01002605 if (beacon_chan->beacon_found ||
2606 beacon_chan->flags & IEEE80211_CHAN_RADAR ||
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05002607 (beacon_chan->band == IEEE80211_BAND_2GHZ &&
Johannes Berg1a919312012-12-03 17:21:11 +01002608 !freq_is_chan_12_13_14(beacon_chan->center_freq)))
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05002609 return 0;
2610
Luis R. Rodriguez3ebfa6e2012-12-19 10:53:02 -08002611 spin_lock_bh(&reg_pending_beacons_lock);
2612 processing = pending_reg_beacon(beacon_chan);
2613 spin_unlock_bh(&reg_pending_beacons_lock);
2614
2615 if (processing)
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05002616 return 0;
2617
2618 reg_beacon = kzalloc(sizeof(struct reg_beacon), gfp);
2619 if (!reg_beacon)
2620 return -ENOMEM;
2621
Johannes Berg1a919312012-12-03 17:21:11 +01002622 REG_DBG_PRINT("Found new beacon on frequency: %d MHz (Ch %d) on %s\n",
Luis R. Rodriguez4113f752010-01-04 11:50:11 -05002623 beacon_chan->center_freq,
2624 ieee80211_frequency_to_channel(beacon_chan->center_freq),
2625 wiphy_name(wiphy));
2626
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05002627 memcpy(&reg_beacon->chan, beacon_chan,
Johannes Berg1a919312012-12-03 17:21:11 +01002628 sizeof(struct ieee80211_channel));
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05002629
2630 /*
2631 * Since we can be called from BH or and non-BH context
2632 * we must use spin_lock_bh()
2633 */
2634 spin_lock_bh(&reg_pending_beacons_lock);
2635 list_add_tail(&reg_beacon->list, &reg_pending_beacons);
2636 spin_unlock_bh(&reg_pending_beacons_lock);
2637
2638 schedule_work(&reg_work);
2639
2640 return 0;
2641}
2642
Johannes Berga3d2eaf2008-09-15 11:10:52 +02002643static void print_rd_rules(const struct ieee80211_regdomain *rd)
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002644{
2645 unsigned int i;
Johannes Berga3d2eaf2008-09-15 11:10:52 +02002646 const struct ieee80211_reg_rule *reg_rule = NULL;
2647 const struct ieee80211_freq_range *freq_range = NULL;
2648 const struct ieee80211_power_rule *power_rule = NULL;
Janusz Dziedzic089027e2014-02-21 19:46:12 +01002649 char bw[32], cac_time[32];
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002650
Janusz Dziedzic089027e2014-02-21 19:46:12 +01002651 pr_info(" (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp), (dfs_cac_time)\n");
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002652
2653 for (i = 0; i < rd->n_reg_rules; i++) {
2654 reg_rule = &rd->reg_rules[i];
2655 freq_range = &reg_rule->freq_range;
2656 power_rule = &reg_rule->power_rule;
2657
Janusz Dziedzicb0dfd2e2014-02-20 13:52:16 +01002658 if (reg_rule->flags & NL80211_RRF_AUTO_BW)
2659 snprintf(bw, sizeof(bw), "%d KHz, %d KHz AUTO",
2660 freq_range->max_bandwidth_khz,
Janusz Dziedzic97524822014-01-30 09:52:20 +01002661 reg_get_max_bandwidth(rd, reg_rule));
2662 else
Janusz Dziedzicb0dfd2e2014-02-20 13:52:16 +01002663 snprintf(bw, sizeof(bw), "%d KHz",
Janusz Dziedzic97524822014-01-30 09:52:20 +01002664 freq_range->max_bandwidth_khz);
2665
Janusz Dziedzic089027e2014-02-21 19:46:12 +01002666 if (reg_rule->flags & NL80211_RRF_DFS)
2667 scnprintf(cac_time, sizeof(cac_time), "%u s",
2668 reg_rule->dfs_cac_ms/1000);
2669 else
2670 scnprintf(cac_time, sizeof(cac_time), "N/A");
2671
2672
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -05002673 /*
2674 * There may not be documentation for max antenna gain
2675 * in certain regions
2676 */
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002677 if (power_rule->max_antenna_gain)
Janusz Dziedzic089027e2014-02-21 19:46:12 +01002678 pr_info(" (%d KHz - %d KHz @ %s), (%d mBi, %d mBm), (%s)\n",
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002679 freq_range->start_freq_khz,
2680 freq_range->end_freq_khz,
Janusz Dziedzic97524822014-01-30 09:52:20 +01002681 bw,
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002682 power_rule->max_antenna_gain,
Janusz Dziedzic089027e2014-02-21 19:46:12 +01002683 power_rule->max_eirp,
2684 cac_time);
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002685 else
Janusz Dziedzic089027e2014-02-21 19:46:12 +01002686 pr_info(" (%d KHz - %d KHz @ %s), (N/A, %d mBm), (%s)\n",
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002687 freq_range->start_freq_khz,
2688 freq_range->end_freq_khz,
Janusz Dziedzic97524822014-01-30 09:52:20 +01002689 bw,
Janusz Dziedzic089027e2014-02-21 19:46:12 +01002690 power_rule->max_eirp,
2691 cac_time);
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002692 }
2693}
2694
Luis R. Rodriguez4c7d3982013-11-13 18:54:02 +01002695bool reg_supported_dfs_region(enum nl80211_dfs_regions dfs_region)
Luis R. Rodriguez8b60b072011-10-11 10:59:02 -07002696{
2697 switch (dfs_region) {
2698 case NL80211_DFS_UNSET:
2699 case NL80211_DFS_FCC:
2700 case NL80211_DFS_ETSI:
2701 case NL80211_DFS_JP:
2702 return true;
2703 default:
2704 REG_DBG_PRINT("Ignoring uknown DFS master region: %d\n",
2705 dfs_region);
2706 return false;
2707 }
2708}
2709
Johannes Berga3d2eaf2008-09-15 11:10:52 +02002710static void print_regdomain(const struct ieee80211_regdomain *rd)
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002711{
Johannes Bergc492db32012-12-06 16:29:25 +01002712 struct regulatory_request *lr = get_last_request();
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002713
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -08002714 if (is_intersected_alpha2(rd->alpha2)) {
Johannes Bergc492db32012-12-06 16:29:25 +01002715 if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) {
Johannes Berg79c97e92009-07-07 03:56:12 +02002716 struct cfg80211_registered_device *rdev;
Johannes Bergc492db32012-12-06 16:29:25 +01002717 rdev = cfg80211_rdev_by_wiphy_idx(lr->wiphy_idx);
Johannes Berg79c97e92009-07-07 03:56:12 +02002718 if (rdev) {
Joe Perchese9c02682010-11-16 19:56:49 -08002719 pr_info("Current regulatory domain updated by AP to: %c%c\n",
Johannes Berg79c97e92009-07-07 03:56:12 +02002720 rdev->country_ie_alpha2[0],
2721 rdev->country_ie_alpha2[1]);
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -08002722 } else
Joe Perchese9c02682010-11-16 19:56:49 -08002723 pr_info("Current regulatory domain intersected:\n");
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -08002724 } else
Joe Perchese9c02682010-11-16 19:56:49 -08002725 pr_info("Current regulatory domain intersected:\n");
Johannes Berg1a919312012-12-03 17:21:11 +01002726 } else if (is_world_regdom(rd->alpha2)) {
Joe Perchese9c02682010-11-16 19:56:49 -08002727 pr_info("World regulatory domain updated:\n");
Johannes Berg1a919312012-12-03 17:21:11 +01002728 } else {
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002729 if (is_unknown_alpha2(rd->alpha2))
Joe Perchese9c02682010-11-16 19:56:49 -08002730 pr_info("Regulatory domain changed to driver built-in settings (unknown country)\n");
Luis R. Rodriguez57b5ce02012-07-12 11:49:18 -07002731 else {
Johannes Bergc492db32012-12-06 16:29:25 +01002732 if (reg_request_cell_base(lr))
Johannes Berg1a919312012-12-03 17:21:11 +01002733 pr_info("Regulatory domain changed to country: %c%c by Cell Station\n",
Luis R. Rodriguez57b5ce02012-07-12 11:49:18 -07002734 rd->alpha2[0], rd->alpha2[1]);
2735 else
Johannes Berg1a919312012-12-03 17:21:11 +01002736 pr_info("Regulatory domain changed to country: %c%c\n",
Luis R. Rodriguez57b5ce02012-07-12 11:49:18 -07002737 rd->alpha2[0], rd->alpha2[1]);
2738 }
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002739 }
Johannes Berg1a919312012-12-03 17:21:11 +01002740
Luis R. Rodriguez3ef121b2013-11-13 18:54:05 +01002741 pr_info(" DFS Master region: %s", reg_dfs_region_str(rd->dfs_region));
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002742 print_rd_rules(rd);
2743}
2744
Johannes Berg2df78162008-10-28 16:49:41 +01002745static void print_regdomain_info(const struct ieee80211_regdomain *rd)
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002746{
Joe Perchese9c02682010-11-16 19:56:49 -08002747 pr_info("Regulatory domain: %c%c\n", rd->alpha2[0], rd->alpha2[1]);
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002748 print_rd_rules(rd);
2749}
2750
Luis R. Rodriguez3b9e5ac2013-11-05 09:18:14 -08002751static int reg_set_rd_core(const struct ieee80211_regdomain *rd)
2752{
2753 if (!is_world_regdom(rd->alpha2))
2754 return -EINVAL;
2755 update_world_regdomain(rd);
2756 return 0;
2757}
2758
Luis R. Rodriguez84721d42013-11-05 09:18:15 -08002759static int reg_set_rd_user(const struct ieee80211_regdomain *rd,
2760 struct regulatory_request *user_request)
2761{
2762 const struct ieee80211_regdomain *intersected_rd = NULL;
2763
Luis R. Rodriguez84721d42013-11-05 09:18:15 -08002764 if (!regdom_changes(rd->alpha2))
2765 return -EALREADY;
2766
2767 if (!is_valid_rd(rd)) {
2768 pr_err("Invalid regulatory domain detected:\n");
2769 print_regdomain_info(rd);
2770 return -EINVAL;
2771 }
2772
2773 if (!user_request->intersect) {
2774 reset_regdomains(false, rd);
2775 return 0;
2776 }
2777
2778 intersected_rd = regdom_intersect(rd, get_cfg80211_regdom());
2779 if (!intersected_rd)
2780 return -EINVAL;
2781
2782 kfree(rd);
2783 rd = NULL;
2784 reset_regdomains(false, intersected_rd);
2785
2786 return 0;
2787}
2788
Luis R. Rodriguezf5fe3242013-11-05 09:18:16 -08002789static int reg_set_rd_driver(const struct ieee80211_regdomain *rd,
2790 struct regulatory_request *driver_request)
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002791{
Johannes Berge9763c32012-12-03 16:59:46 +01002792 const struct ieee80211_regdomain *regd;
Luis R. Rodriguez9c964772008-10-30 13:33:53 -07002793 const struct ieee80211_regdomain *intersected_rd = NULL;
Luis R. Rodriguezf5fe3242013-11-05 09:18:16 -08002794 const struct ieee80211_regdomain *tmp;
Luis R. Rodriguez806a9e32009-02-21 00:04:26 -05002795 struct wiphy *request_wiphy;
Johannes Berg6913b492012-12-04 00:48:59 +01002796
Luis R. Rodriguezf5fe3242013-11-05 09:18:16 -08002797 if (is_world_regdom(rd->alpha2))
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002798 return -EINVAL;
2799
Luis R. Rodriguezf5fe3242013-11-05 09:18:16 -08002800 if (!regdom_changes(rd->alpha2))
2801 return -EALREADY;
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002802
Luis R. Rodriguez8375af32008-11-12 14:21:57 -08002803 if (!is_valid_rd(rd)) {
Joe Perchese9c02682010-11-16 19:56:49 -08002804 pr_err("Invalid regulatory domain detected:\n");
Luis R. Rodriguez8375af32008-11-12 14:21:57 -08002805 print_regdomain_info(rd);
2806 return -EINVAL;
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002807 }
2808
Luis R. Rodriguezf5fe3242013-11-05 09:18:16 -08002809 request_wiphy = wiphy_idx_to_wiphy(driver_request->wiphy_idx);
2810 if (!request_wiphy) {
Shaibal Dutta845f3352014-01-30 15:08:30 -08002811 queue_delayed_work(system_power_efficient_wq,
2812 &reg_timeout, 0);
Johannes Bergde3584b2011-11-21 10:44:00 +01002813 return -ENODEV;
2814 }
Luis R. Rodriguez806a9e32009-02-21 00:04:26 -05002815
Luis R. Rodriguezf5fe3242013-11-05 09:18:16 -08002816 if (!driver_request->intersect) {
Luis R. Rodriguez558f6d32009-06-08 18:54:37 -07002817 if (request_wiphy->regd)
2818 return -EALREADY;
Luis R. Rodriguez3e0c3ff2009-01-07 17:43:34 -08002819
Johannes Berge9763c32012-12-03 16:59:46 +01002820 regd = reg_copy_regd(rd);
2821 if (IS_ERR(regd))
2822 return PTR_ERR(regd);
Luis R. Rodriguez3e0c3ff2009-01-07 17:43:34 -08002823
Johannes Berg458f4f92012-12-06 15:47:38 +01002824 rcu_assign_pointer(request_wiphy->regd, regd);
Johannes Berg379b82f2012-12-06 15:44:07 +01002825 reset_regdomains(false, rd);
Luis R. Rodriguezb8295ac2008-11-12 14:21:58 -08002826 return 0;
2827 }
2828
Luis R. Rodriguezf5fe3242013-11-05 09:18:16 -08002829 intersected_rd = regdom_intersect(rd, get_cfg80211_regdom());
2830 if (!intersected_rd)
2831 return -EINVAL;
Luis R. Rodriguezb8295ac2008-11-12 14:21:58 -08002832
Luis R. Rodriguezf5fe3242013-11-05 09:18:16 -08002833 /*
2834 * We can trash what CRDA provided now.
2835 * However if a driver requested this specific regulatory
2836 * domain we keep it for its private use
2837 */
2838 tmp = get_wiphy_regdom(request_wiphy);
2839 rcu_assign_pointer(request_wiphy->regd, rd);
2840 rcu_free_regdom(tmp);
Luis R. Rodriguezb8295ac2008-11-12 14:21:58 -08002841
Luis R. Rodriguezf5fe3242013-11-05 09:18:16 -08002842 rd = NULL;
Larry Fingerb7566fc2013-02-04 15:33:44 -06002843
Luis R. Rodriguezf5fe3242013-11-05 09:18:16 -08002844 reset_regdomains(false, intersected_rd);
Luis R. Rodriguez3e0c3ff2009-01-07 17:43:34 -08002845
Luis R. Rodriguezf5fe3242013-11-05 09:18:16 -08002846 return 0;
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002847}
2848
Luis R. Rodriguez01992402013-11-05 09:18:17 -08002849static int reg_set_rd_country_ie(const struct ieee80211_regdomain *rd,
2850 struct regulatory_request *country_ie_request)
Luis R. Rodriguezf5fe3242013-11-05 09:18:16 -08002851{
2852 struct wiphy *request_wiphy;
2853
2854 if (!is_alpha2_set(rd->alpha2) && !is_an_alpha2(rd->alpha2) &&
2855 !is_unknown_alpha2(rd->alpha2))
2856 return -EINVAL;
2857
2858 /*
2859 * Lets only bother proceeding on the same alpha2 if the current
2860 * rd is non static (it means CRDA was present and was used last)
2861 * and the pending request came in from a country IE
2862 */
2863
2864 if (!is_valid_rd(rd)) {
2865 pr_err("Invalid regulatory domain detected:\n");
2866 print_regdomain_info(rd);
2867 return -EINVAL;
2868 }
2869
Luis R. Rodriguez01992402013-11-05 09:18:17 -08002870 request_wiphy = wiphy_idx_to_wiphy(country_ie_request->wiphy_idx);
Luis R. Rodriguezf5fe3242013-11-05 09:18:16 -08002871 if (!request_wiphy) {
Shaibal Dutta845f3352014-01-30 15:08:30 -08002872 queue_delayed_work(system_power_efficient_wq,
2873 &reg_timeout, 0);
Luis R. Rodriguezf5fe3242013-11-05 09:18:16 -08002874 return -ENODEV;
2875 }
2876
Luis R. Rodriguez01992402013-11-05 09:18:17 -08002877 if (country_ie_request->intersect)
Luis R. Rodriguezf5fe3242013-11-05 09:18:16 -08002878 return -EINVAL;
2879
2880 reset_regdomains(false, rd);
2881 return 0;
2882}
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002883
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -05002884/*
2885 * Use this call to set the current regulatory domain. Conflicts with
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002886 * multiple drivers can be ironed out later. Caller must've already
Johannes Berg458f4f92012-12-06 15:47:38 +01002887 * kmalloc'd the rd structure.
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -05002888 */
Johannes Berga3d2eaf2008-09-15 11:10:52 +02002889int set_regdom(const struct ieee80211_regdomain *rd)
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002890{
Johannes Bergc492db32012-12-06 16:29:25 +01002891 struct regulatory_request *lr;
Janusz Dziedzic092008a2014-02-14 08:54:00 +01002892 bool user_reset = false;
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002893 int r;
2894
Luis R. Rodriguez3b9e5ac2013-11-05 09:18:14 -08002895 if (!reg_is_valid_request(rd->alpha2)) {
2896 kfree(rd);
2897 return -EINVAL;
2898 }
2899
Johannes Bergc492db32012-12-06 16:29:25 +01002900 lr = get_last_request();
Luis R. Rodriguezabc73812009-07-30 17:38:08 -07002901
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002902 /* Note that this doesn't update the wiphys, this is done below */
Luis R. Rodriguez3b9e5ac2013-11-05 09:18:14 -08002903 switch (lr->initiator) {
2904 case NL80211_REGDOM_SET_BY_CORE:
2905 r = reg_set_rd_core(rd);
2906 break;
2907 case NL80211_REGDOM_SET_BY_USER:
Luis R. Rodriguez84721d42013-11-05 09:18:15 -08002908 r = reg_set_rd_user(rd, lr);
Janusz Dziedzic092008a2014-02-14 08:54:00 +01002909 user_reset = true;
Luis R. Rodriguez84721d42013-11-05 09:18:15 -08002910 break;
Luis R. Rodriguez3b9e5ac2013-11-05 09:18:14 -08002911 case NL80211_REGDOM_SET_BY_DRIVER:
Luis R. Rodriguezf5fe3242013-11-05 09:18:16 -08002912 r = reg_set_rd_driver(rd, lr);
2913 break;
Luis R. Rodriguez3b9e5ac2013-11-05 09:18:14 -08002914 case NL80211_REGDOM_SET_BY_COUNTRY_IE:
Luis R. Rodriguez01992402013-11-05 09:18:17 -08002915 r = reg_set_rd_country_ie(rd, lr);
Luis R. Rodriguez3b9e5ac2013-11-05 09:18:14 -08002916 break;
2917 default:
2918 WARN(1, "invalid initiator %d\n", lr->initiator);
2919 return -EINVAL;
2920 }
2921
Johannes Bergd2372b32008-10-24 20:32:20 +02002922 if (r) {
Janusz Dziedzic092008a2014-02-14 08:54:00 +01002923 switch (r) {
2924 case -EALREADY:
Kalle Valo95908532012-07-12 15:33:58 +03002925 reg_set_request_processed();
Janusz Dziedzic092008a2014-02-14 08:54:00 +01002926 break;
2927 default:
2928 /* Back to world regulatory in case of errors */
2929 restore_regulatory_settings(user_reset);
2930 }
Kalle Valo95908532012-07-12 15:33:58 +03002931
Johannes Bergd2372b32008-10-24 20:32:20 +02002932 kfree(rd);
Johannes Berg38fd2142013-05-10 19:17:17 +02002933 return r;
Johannes Bergd2372b32008-10-24 20:32:20 +02002934 }
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002935
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002936 /* This would make this whole thing pointless */
Johannes Berg38fd2142013-05-10 19:17:17 +02002937 if (WARN_ON(!lr->intersect && rd != get_cfg80211_regdom()))
2938 return -EINVAL;
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002939
2940 /* update all wiphys now with the new established regulatory domain */
Johannes Bergc492db32012-12-06 16:29:25 +01002941 update_all_wiphy_regulatory(lr->initiator);
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002942
Johannes Berg458f4f92012-12-06 15:47:38 +01002943 print_regdomain(get_cfg80211_regdom());
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002944
Johannes Bergc492db32012-12-06 16:29:25 +01002945 nl80211_send_reg_change_event(lr);
Luis R. Rodriguez73d54c92009-03-09 22:07:42 -04002946
Luis R. Rodriguezb2e253c2010-11-17 21:46:09 -08002947 reg_set_request_processed();
2948
Johannes Berg38fd2142013-05-10 19:17:17 +02002949 return 0;
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002950}
2951
Arik Nemtsov2c3e8612015-01-07 16:47:19 +02002952static int __regulatory_set_wiphy_regd(struct wiphy *wiphy,
2953 struct ieee80211_regdomain *rd)
Jonathan Doronb0d7aa52014-12-15 19:26:00 +02002954{
2955 const struct ieee80211_regdomain *regd;
2956 const struct ieee80211_regdomain *prev_regd;
2957 struct cfg80211_registered_device *rdev;
2958
2959 if (WARN_ON(!wiphy || !rd))
2960 return -EINVAL;
2961
2962 if (WARN(!(wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED),
2963 "wiphy should have REGULATORY_WIPHY_SELF_MANAGED\n"))
2964 return -EPERM;
2965
2966 if (WARN(!is_valid_rd(rd), "Invalid regulatory domain detected\n")) {
2967 print_regdomain_info(rd);
2968 return -EINVAL;
2969 }
2970
2971 regd = reg_copy_regd(rd);
2972 if (IS_ERR(regd))
2973 return PTR_ERR(regd);
2974
2975 rdev = wiphy_to_rdev(wiphy);
2976
2977 spin_lock(&reg_requests_lock);
2978 prev_regd = rdev->requested_regd;
2979 rdev->requested_regd = regd;
2980 spin_unlock(&reg_requests_lock);
2981
2982 kfree(prev_regd);
Arik Nemtsov2c3e8612015-01-07 16:47:19 +02002983 return 0;
2984}
2985
2986int regulatory_set_wiphy_regd(struct wiphy *wiphy,
2987 struct ieee80211_regdomain *rd)
2988{
2989 int ret = __regulatory_set_wiphy_regd(wiphy, rd);
2990
2991 if (ret)
2992 return ret;
Jonathan Doronb0d7aa52014-12-15 19:26:00 +02002993
2994 schedule_work(&reg_work);
2995 return 0;
2996}
2997EXPORT_SYMBOL(regulatory_set_wiphy_regd);
2998
Arik Nemtsov2c3e8612015-01-07 16:47:19 +02002999int regulatory_set_wiphy_regd_sync_rtnl(struct wiphy *wiphy,
3000 struct ieee80211_regdomain *rd)
3001{
3002 int ret;
3003
3004 ASSERT_RTNL();
3005
3006 ret = __regulatory_set_wiphy_regd(wiphy, rd);
3007 if (ret)
3008 return ret;
3009
3010 /* process the request immediately */
3011 reg_process_self_managed_hints();
3012 return 0;
3013}
3014EXPORT_SYMBOL(regulatory_set_wiphy_regd_sync_rtnl);
3015
Luis R. Rodriguez57b5ce02012-07-12 11:49:18 -07003016void wiphy_regulatory_register(struct wiphy *wiphy)
3017{
Arik Nemtsov23df0b72013-07-21 16:36:48 +03003018 struct regulatory_request *lr;
3019
Jonathan Doronb0d7aa52014-12-15 19:26:00 +02003020 /* self-managed devices ignore external hints */
3021 if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED)
3022 wiphy->regulatory_flags |= REGULATORY_DISABLE_BEACON_HINTS |
3023 REGULATORY_COUNTRY_IE_IGNORE;
3024
Luis R. Rodriguez57b5ce02012-07-12 11:49:18 -07003025 if (!reg_dev_ignore_cell_hint(wiphy))
3026 reg_num_devs_support_basehint++;
3027
Arik Nemtsov23df0b72013-07-21 16:36:48 +03003028 lr = get_last_request();
3029 wiphy_update_regulatory(wiphy, lr->initiator);
Luis R. Rodriguez57b5ce02012-07-12 11:49:18 -07003030}
3031
Luis R. Rodriguezbfead082012-07-12 11:49:19 -07003032void wiphy_regulatory_deregister(struct wiphy *wiphy)
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -08003033{
Luis R. Rodriguez0ad8aca2009-03-24 21:21:08 -04003034 struct wiphy *request_wiphy = NULL;
Johannes Bergc492db32012-12-06 16:29:25 +01003035 struct regulatory_request *lr;
Luis R. Rodriguez761cf7e2009-02-21 00:04:25 -05003036
Johannes Bergc492db32012-12-06 16:29:25 +01003037 lr = get_last_request();
Luis R. Rodriguezabc73812009-07-30 17:38:08 -07003038
Luis R. Rodriguez57b5ce02012-07-12 11:49:18 -07003039 if (!reg_dev_ignore_cell_hint(wiphy))
3040 reg_num_devs_support_basehint--;
3041
Johannes Berg458f4f92012-12-06 15:47:38 +01003042 rcu_free_regdom(get_wiphy_regdom(wiphy));
Monam Agarwal34dd8862014-03-24 00:53:40 +05303043 RCU_INIT_POINTER(wiphy->regd, NULL);
Chris Wright0ef9ccd2009-04-24 14:09:31 -07003044
Johannes Bergc492db32012-12-06 16:29:25 +01003045 if (lr)
3046 request_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx);
Luis R. Rodriguez806a9e32009-02-21 00:04:26 -05003047
Chris Wright0ef9ccd2009-04-24 14:09:31 -07003048 if (!request_wiphy || request_wiphy != wiphy)
Johannes Berg38fd2142013-05-10 19:17:17 +02003049 return;
Chris Wright0ef9ccd2009-04-24 14:09:31 -07003050
Johannes Bergc492db32012-12-06 16:29:25 +01003051 lr->wiphy_idx = WIPHY_IDX_INVALID;
3052 lr->country_ie_env = ENVIRON_ANY;
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -08003053}
3054
Luis R. Rodrigueza90c7a32011-04-05 10:49:04 -07003055static void reg_timeout_work(struct work_struct *work)
3056{
Johannes Berg1a919312012-12-03 17:21:11 +01003057 REG_DBG_PRINT("Timeout while waiting for CRDA to reply, restoring regulatory settings\n");
Johannes Bergf77b86d2013-06-24 15:43:38 +02003058 rtnl_lock();
Luis R. Rodrigueza90c7a32011-04-05 10:49:04 -07003059 restore_regulatory_settings(true);
Johannes Bergf77b86d2013-06-24 15:43:38 +02003060 rtnl_unlock();
Luis R. Rodrigueza90c7a32011-04-05 10:49:04 -07003061}
3062
Ilan Peer174e0cd2014-02-23 09:13:01 +02003063/*
3064 * See http://www.fcc.gov/document/5-ghz-unlicensed-spectrum-unii, for
3065 * UNII band definitions
3066 */
3067int cfg80211_get_unii(int freq)
3068{
3069 /* UNII-1 */
3070 if (freq >= 5150 && freq <= 5250)
3071 return 0;
3072
3073 /* UNII-2A */
3074 if (freq > 5250 && freq <= 5350)
3075 return 1;
3076
3077 /* UNII-2B */
3078 if (freq > 5350 && freq <= 5470)
3079 return 2;
3080
3081 /* UNII-2C */
3082 if (freq > 5470 && freq <= 5725)
3083 return 3;
3084
3085 /* UNII-3 */
3086 if (freq > 5725 && freq <= 5825)
3087 return 4;
3088
3089 return -EINVAL;
3090}
3091
Ilan Peerc8866e52014-02-23 09:13:03 +02003092bool regulatory_indoor_allowed(void)
3093{
3094 return reg_is_indoor;
3095}
3096
Uwe Kleine-König2fcc9f72010-06-18 09:38:55 +02003097int __init regulatory_init(void)
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07003098{
Luis R. Rodriguezbcf4f992009-02-21 00:04:24 -05003099 int err = 0;
Johannes Berg734366d2008-09-15 10:56:48 +02003100
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07003101 reg_pdev = platform_device_register_simple("regulatory", 0, NULL, 0);
3102 if (IS_ERR(reg_pdev))
3103 return PTR_ERR(reg_pdev);
Johannes Berg734366d2008-09-15 10:56:48 +02003104
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05003105 spin_lock_init(&reg_requests_lock);
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05003106 spin_lock_init(&reg_pending_beacons_lock);
Ilan peer05050752015-03-04 00:32:06 -05003107 spin_lock_init(&reg_indoor_lock);
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05003108
Luis R. Rodriguez80007ef2012-03-23 07:23:31 -07003109 reg_regdb_size_check();
3110
Johannes Berg458f4f92012-12-06 15:47:38 +01003111 rcu_assign_pointer(cfg80211_regdomain, cfg80211_world_regdom);
Johannes Berg734366d2008-09-15 10:56:48 +02003112
Luis R. Rodriguez09d989d2010-01-29 19:58:57 -05003113 user_alpha2[0] = '9';
3114 user_alpha2[1] = '7';
3115
Luis R. Rodriguezae9e4b02009-07-14 20:23:15 -04003116 /* We always try to get an update for the static regdomain */
Johannes Berg458f4f92012-12-06 15:47:38 +01003117 err = regulatory_hint_core(cfg80211_world_regdom->alpha2);
Luis R. Rodriguezbcf4f992009-02-21 00:04:24 -05003118 if (err) {
3119 if (err == -ENOMEM)
3120 return err;
3121 /*
3122 * N.B. kobject_uevent_env() can fail mainly for when we're out
3123 * memory which is handled and propagated appropriately above
3124 * but it can also fail during a netlink_broadcast() or during
3125 * early boot for call_usermodehelper(). For now treat these
3126 * errors as non-fatal.
3127 */
Joe Perchese9c02682010-11-16 19:56:49 -08003128 pr_err("kobject_uevent_env() was unable to call CRDA during init\n");
Luis R. Rodriguezbcf4f992009-02-21 00:04:24 -05003129 }
Johannes Berg734366d2008-09-15 10:56:48 +02003130
Luis R. Rodriguezae9e4b02009-07-14 20:23:15 -04003131 /*
3132 * Finally, if the user set the module parameter treat it
3133 * as a user hint.
3134 */
3135 if (!is_world_regdom(ieee80211_regdom))
Luis R. Rodriguez57b5ce02012-07-12 11:49:18 -07003136 regulatory_hint_user(ieee80211_regdom,
3137 NL80211_USER_REG_HINT_USER);
Luis R. Rodriguezae9e4b02009-07-14 20:23:15 -04003138
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07003139 return 0;
3140}
3141
Johannes Berg1a919312012-12-03 17:21:11 +01003142void regulatory_exit(void)
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07003143{
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05003144 struct regulatory_request *reg_request, *tmp;
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05003145 struct reg_beacon *reg_beacon, *btmp;
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05003146
3147 cancel_work_sync(&reg_work);
Luis R. Rodrigueza90c7a32011-04-05 10:49:04 -07003148 cancel_delayed_work_sync(&reg_timeout);
Arik Nemtsovad932f02014-11-27 09:44:55 +02003149 cancel_delayed_work_sync(&reg_check_chans);
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05003150
Johannes Berg9027b142012-12-03 17:59:24 +01003151 /* Lock to suppress warnings */
Johannes Berg38fd2142013-05-10 19:17:17 +02003152 rtnl_lock();
Johannes Berg379b82f2012-12-06 15:44:07 +01003153 reset_regdomains(true, NULL);
Johannes Berg38fd2142013-05-10 19:17:17 +02003154 rtnl_unlock();
Johannes Berg734366d2008-09-15 10:56:48 +02003155
Luis R. Rodriguez58ebacc2011-11-08 14:28:06 -08003156 dev_set_uevent_suppress(&reg_pdev->dev, true);
Johannes Bergf6037d02008-10-21 11:01:33 +02003157
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07003158 platform_device_unregister(reg_pdev);
Johannes Berg734366d2008-09-15 10:56:48 +02003159
Johannes Bergfea9bce2012-12-03 17:32:01 +01003160 list_for_each_entry_safe(reg_beacon, btmp, &reg_pending_beacons, list) {
3161 list_del(&reg_beacon->list);
3162 kfree(reg_beacon);
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05003163 }
3164
Johannes Bergfea9bce2012-12-03 17:32:01 +01003165 list_for_each_entry_safe(reg_beacon, btmp, &reg_beacon_list, list) {
3166 list_del(&reg_beacon->list);
3167 kfree(reg_beacon);
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05003168 }
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05003169
Johannes Bergfea9bce2012-12-03 17:32:01 +01003170 list_for_each_entry_safe(reg_request, tmp, &reg_requests_list, list) {
3171 list_del(&reg_request->list);
3172 kfree(reg_request);
Johannes Berg8318d782008-01-24 19:38:38 +01003173 }
Johannes Berg8318d782008-01-24 19:38:38 +01003174}