blob: 43b3e577b2eabc439469f99562da3a7b8152b766 [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 Bergb6863032015-10-15 09:25:18 +0200138static void restore_regulatory_settings(bool reset_user);
Ilan peerc37722b2015-03-30 15:15:49 +0300139
Johannes Berg458f4f92012-12-06 15:47:38 +0100140static const struct ieee80211_regdomain *get_cfg80211_regdom(void)
141{
Johannes Berg38fd2142013-05-10 19:17:17 +0200142 return rtnl_dereference(cfg80211_regdomain);
Johannes Berg458f4f92012-12-06 15:47:38 +0100143}
144
Arik Nemtsovad30ca22014-12-15 19:25:59 +0200145const struct ieee80211_regdomain *get_wiphy_regdom(struct wiphy *wiphy)
Johannes Berg458f4f92012-12-06 15:47:38 +0100146{
Johannes Berg38fd2142013-05-10 19:17:17 +0200147 return rtnl_dereference(wiphy->regd);
Johannes Berg458f4f92012-12-06 15:47:38 +0100148}
149
Luis R. Rodriguez3ef121b2013-11-13 18:54:05 +0100150static const char *reg_dfs_region_str(enum nl80211_dfs_regions dfs_region)
151{
152 switch (dfs_region) {
153 case NL80211_DFS_UNSET:
154 return "unset";
155 case NL80211_DFS_FCC:
156 return "FCC";
157 case NL80211_DFS_ETSI:
158 return "ETSI";
159 case NL80211_DFS_JP:
160 return "JP";
161 }
162 return "Unknown";
163}
164
Luis R. Rodriguez6c474792013-11-25 20:56:09 +0100165enum nl80211_dfs_regions reg_get_dfs_region(struct wiphy *wiphy)
166{
167 const struct ieee80211_regdomain *regd = NULL;
168 const struct ieee80211_regdomain *wiphy_regd = NULL;
169
170 regd = get_cfg80211_regdom();
171 if (!wiphy)
172 goto out;
173
174 wiphy_regd = get_wiphy_regdom(wiphy);
175 if (!wiphy_regd)
176 goto out;
177
178 if (wiphy_regd->dfs_region == regd->dfs_region)
179 goto out;
180
181 REG_DBG_PRINT("%s: device specific dfs_region "
182 "(%s) disagrees with cfg80211's "
183 "central dfs_region (%s)\n",
184 dev_name(&wiphy->dev),
185 reg_dfs_region_str(wiphy_regd->dfs_region),
186 reg_dfs_region_str(regd->dfs_region));
187
188out:
189 return regd->dfs_region;
190}
191
Johannes Berg458f4f92012-12-06 15:47:38 +0100192static void rcu_free_regdom(const struct ieee80211_regdomain *r)
193{
194 if (!r)
195 return;
196 kfree_rcu((struct ieee80211_regdomain *)r, rcu_head);
197}
198
Johannes Bergc492db32012-12-06 16:29:25 +0100199static struct regulatory_request *get_last_request(void)
200{
Johannes Berg38fd2142013-05-10 19:17:17 +0200201 return rcu_dereference_rtnl(last_request);
Johannes Bergc492db32012-12-06 16:29:25 +0100202}
203
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -0500204/* Used to queue up regulatory hints */
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -0500205static LIST_HEAD(reg_requests_list);
206static spinlock_t reg_requests_lock;
207
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -0500208/* Used to queue up beacon hints for review */
209static LIST_HEAD(reg_pending_beacons);
210static spinlock_t reg_pending_beacons_lock;
211
212/* Used to keep track of processed beacon hints */
213static LIST_HEAD(reg_beacon_list);
214
215struct reg_beacon {
216 struct list_head list;
217 struct ieee80211_channel chan;
218};
219
Arik Nemtsovad932f02014-11-27 09:44:55 +0200220static void reg_check_chans_work(struct work_struct *work);
221static DECLARE_DELAYED_WORK(reg_check_chans, reg_check_chans_work);
222
Luis R. Rodriguezf333a7a2010-11-17 21:46:07 -0800223static void reg_todo(struct work_struct *work);
224static DECLARE_WORK(reg_work, reg_todo);
225
Johannes Berg734366d2008-09-15 10:56:48 +0200226/* We keep a static world regulatory domain in case of the absence of CRDA */
227static const struct ieee80211_regdomain world_regdom = {
Jason Abele28981e52015-02-17 16:10:41 -0800228 .n_reg_rules = 8,
Johannes Berg734366d2008-09-15 10:56:48 +0200229 .alpha2 = "00",
230 .reg_rules = {
Luis R. Rodriguez68798a62009-02-21 00:20:37 -0500231 /* IEEE 802.11b/g, channels 1..11 */
232 REG_RULE(2412-10, 2462+10, 40, 6, 20, 0),
Johannes Berg43c771a2012-11-12 10:51:34 +0100233 /* IEEE 802.11b/g, channels 12..13. */
234 REG_RULE(2467-10, 2472+10, 40, 6, 20,
Luis R. Rodriguez8fe02e12013-10-21 19:22:25 +0200235 NL80211_RRF_NO_IR),
Luis R. Rodriguez611b6a82009-03-05 21:19:21 -0800236 /* IEEE 802.11 channel 14 - Only JP enables
237 * this and for 802.11b only */
238 REG_RULE(2484-10, 2484+10, 20, 6, 20,
Luis R. Rodriguez8fe02e12013-10-21 19:22:25 +0200239 NL80211_RRF_NO_IR |
Luis R. Rodriguez611b6a82009-03-05 21:19:21 -0800240 NL80211_RRF_NO_OFDM),
241 /* IEEE 802.11a, channel 36..48 */
Johannes Berg131a19b2013-03-04 20:54:46 +0100242 REG_RULE(5180-10, 5240+10, 160, 6, 20,
Luis R. Rodriguez8fe02e12013-10-21 19:22:25 +0200243 NL80211_RRF_NO_IR),
Luis R. Rodriguez3fc71f72009-02-21 00:20:38 -0500244
Johannes Berg131a19b2013-03-04 20:54:46 +0100245 /* IEEE 802.11a, channel 52..64 - DFS required */
246 REG_RULE(5260-10, 5320+10, 160, 6, 20,
Luis R. Rodriguez8fe02e12013-10-21 19:22:25 +0200247 NL80211_RRF_NO_IR |
Johannes Berg131a19b2013-03-04 20:54:46 +0100248 NL80211_RRF_DFS),
249
250 /* IEEE 802.11a, channel 100..144 - DFS required */
251 REG_RULE(5500-10, 5720+10, 160, 6, 20,
Luis R. Rodriguez8fe02e12013-10-21 19:22:25 +0200252 NL80211_RRF_NO_IR |
Johannes Berg131a19b2013-03-04 20:54:46 +0100253 NL80211_RRF_DFS),
Luis R. Rodriguez3fc71f72009-02-21 00:20:38 -0500254
255 /* IEEE 802.11a, channel 149..165 */
Johannes Berg8ab9d852012-12-03 22:09:22 +0100256 REG_RULE(5745-10, 5825+10, 80, 6, 20,
Luis R. Rodriguez8fe02e12013-10-21 19:22:25 +0200257 NL80211_RRF_NO_IR),
Vladimir Kondratiev90cdc6d2012-07-02 09:32:34 +0300258
Johannes Berg8047d262015-10-15 16:16:09 +0200259 /* IEEE 802.11ad (60GHz), channels 1..3 */
Vladimir Kondratiev90cdc6d2012-07-02 09:32:34 +0300260 REG_RULE(56160+2160*1-1080, 56160+2160*3+1080, 2160, 0, 0, 0),
Johannes Berg734366d2008-09-15 10:56:48 +0200261 }
262};
263
Johannes Berg38fd2142013-05-10 19:17:17 +0200264/* protected by RTNL */
Johannes Berga3d2eaf2008-09-15 11:10:52 +0200265static const struct ieee80211_regdomain *cfg80211_world_regdom =
266 &world_regdom;
Johannes Berg734366d2008-09-15 10:56:48 +0200267
Luis R. Rodriguez6ee7d332009-03-20 23:53:06 -0400268static char *ieee80211_regdom = "00";
Luis R. Rodriguez09d989d2010-01-29 19:58:57 -0500269static char user_alpha2[2];
Luis R. Rodriguez6ee7d332009-03-20 23:53:06 -0400270
Johannes Berg734366d2008-09-15 10:56:48 +0200271module_param(ieee80211_regdom, charp, 0444);
272MODULE_PARM_DESC(ieee80211_regdom, "IEEE 802.11 regulatory domain code");
273
Arik Nemtsovc8883932014-04-21 20:39:34 -0700274static void reg_free_request(struct regulatory_request *request)
Luis R. Rodriguez5ad6ef52013-11-05 09:18:08 -0800275{
Johannes Bergd34265a2015-10-15 13:05:55 +0200276 if (request == &core_request_world)
277 return;
278
Arik Nemtsovc8883932014-04-21 20:39:34 -0700279 if (request != get_last_request())
280 kfree(request);
281}
282
283static void reg_free_last_request(void)
284{
285 struct regulatory_request *lr = get_last_request();
286
Luis R. Rodriguez5ad6ef52013-11-05 09:18:08 -0800287 if (lr != &core_request_world && lr)
288 kfree_rcu(lr, rcu_head);
289}
290
Luis R. Rodriguez05f1a3e2013-11-05 09:18:09 -0800291static void reg_update_last_request(struct regulatory_request *request)
292{
Luis R. Rodriguez255e25b2014-02-25 17:09:40 -0800293 struct regulatory_request *lr;
294
295 lr = get_last_request();
296 if (lr == request)
297 return;
298
Arik Nemtsovc8883932014-04-21 20:39:34 -0700299 reg_free_last_request();
Luis R. Rodriguez05f1a3e2013-11-05 09:18:09 -0800300 rcu_assign_pointer(last_request, request);
301}
302
Johannes Berg379b82f2012-12-06 15:44:07 +0100303static void reset_regdomains(bool full_reset,
304 const struct ieee80211_regdomain *new_regdom)
Johannes Berg734366d2008-09-15 10:56:48 +0200305{
Johannes Berg458f4f92012-12-06 15:47:38 +0100306 const struct ieee80211_regdomain *r;
307
Johannes Berg38fd2142013-05-10 19:17:17 +0200308 ASSERT_RTNL();
Johannes Berge8da2bb2012-12-03 23:00:08 +0100309
Johannes Berg458f4f92012-12-06 15:47:38 +0100310 r = get_cfg80211_regdom();
311
Johannes Berg942b25c2008-09-15 11:26:47 +0200312 /* avoid freeing static information or freeing something twice */
Johannes Berg458f4f92012-12-06 15:47:38 +0100313 if (r == cfg80211_world_regdom)
314 r = NULL;
Johannes Berg942b25c2008-09-15 11:26:47 +0200315 if (cfg80211_world_regdom == &world_regdom)
316 cfg80211_world_regdom = NULL;
Johannes Berg458f4f92012-12-06 15:47:38 +0100317 if (r == &world_regdom)
318 r = NULL;
Johannes Berg942b25c2008-09-15 11:26:47 +0200319
Johannes Berg458f4f92012-12-06 15:47:38 +0100320 rcu_free_regdom(r);
321 rcu_free_regdom(cfg80211_world_regdom);
Johannes Berg734366d2008-09-15 10:56:48 +0200322
Johannes Berga3d2eaf2008-09-15 11:10:52 +0200323 cfg80211_world_regdom = &world_regdom;
Johannes Berg458f4f92012-12-06 15:47:38 +0100324 rcu_assign_pointer(cfg80211_regdomain, new_regdom);
Luis R. Rodrigueza0429942011-11-28 16:47:15 -0500325
326 if (!full_reset)
327 return;
328
Luis R. Rodriguez05f1a3e2013-11-05 09:18:09 -0800329 reg_update_last_request(&core_request_world);
Johannes Berg734366d2008-09-15 10:56:48 +0200330}
331
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -0500332/*
333 * Dynamic world regulatory domain requested by the wireless
334 * core upon initialization
335 */
Johannes Berga3d2eaf2008-09-15 11:10:52 +0200336static void update_world_regdomain(const struct ieee80211_regdomain *rd)
Johannes Berg734366d2008-09-15 10:56:48 +0200337{
Johannes Bergc492db32012-12-06 16:29:25 +0100338 struct regulatory_request *lr;
Johannes Berg734366d2008-09-15 10:56:48 +0200339
Johannes Bergc492db32012-12-06 16:29:25 +0100340 lr = get_last_request();
341
342 WARN_ON(!lr);
Johannes Berge8da2bb2012-12-03 23:00:08 +0100343
Johannes Berg379b82f2012-12-06 15:44:07 +0100344 reset_regdomains(false, rd);
Johannes Berg734366d2008-09-15 10:56:48 +0200345
346 cfg80211_world_regdom = rd;
Johannes Berg734366d2008-09-15 10:56:48 +0200347}
Johannes Berg734366d2008-09-15 10:56:48 +0200348
Johannes Berga3d2eaf2008-09-15 11:10:52 +0200349bool is_world_regdom(const char *alpha2)
Johannes Berg8318d782008-01-24 19:38:38 +0100350{
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700351 if (!alpha2)
352 return false;
Johannes Berg1a919312012-12-03 17:21:11 +0100353 return alpha2[0] == '0' && alpha2[1] == '0';
Johannes Berg8318d782008-01-24 19:38:38 +0100354}
355
Johannes Berga3d2eaf2008-09-15 11:10:52 +0200356static bool is_alpha2_set(const char *alpha2)
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700357{
358 if (!alpha2)
359 return false;
Johannes Berg1a919312012-12-03 17:21:11 +0100360 return alpha2[0] && alpha2[1];
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700361}
Johannes Berg8318d782008-01-24 19:38:38 +0100362
Johannes Berga3d2eaf2008-09-15 11:10:52 +0200363static bool is_unknown_alpha2(const char *alpha2)
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700364{
365 if (!alpha2)
366 return false;
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -0500367 /*
368 * Special case where regulatory domain was built by driver
369 * but a specific alpha2 cannot be determined
370 */
Johannes Berg1a919312012-12-03 17:21:11 +0100371 return alpha2[0] == '9' && alpha2[1] == '9';
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700372}
373
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -0800374static bool is_intersected_alpha2(const char *alpha2)
375{
376 if (!alpha2)
377 return false;
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -0500378 /*
379 * Special case where regulatory domain is the
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -0800380 * result of an intersection between two regulatory domain
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -0500381 * structures
382 */
Johannes Berg1a919312012-12-03 17:21:11 +0100383 return alpha2[0] == '9' && alpha2[1] == '8';
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -0800384}
385
Johannes Berga3d2eaf2008-09-15 11:10:52 +0200386static bool is_an_alpha2(const char *alpha2)
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700387{
388 if (!alpha2)
389 return false;
Johannes Berg1a919312012-12-03 17:21:11 +0100390 return isalpha(alpha2[0]) && isalpha(alpha2[1]);
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700391}
392
Johannes Berga3d2eaf2008-09-15 11:10:52 +0200393static bool alpha2_equal(const char *alpha2_x, const char *alpha2_y)
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700394{
395 if (!alpha2_x || !alpha2_y)
396 return false;
Johannes Berg1a919312012-12-03 17:21:11 +0100397 return alpha2_x[0] == alpha2_y[0] && alpha2_x[1] == alpha2_y[1];
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700398}
399
Luis R. Rodriguez69b15722009-02-21 00:04:33 -0500400static bool regdom_changes(const char *alpha2)
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700401{
Johannes Berg458f4f92012-12-06 15:47:38 +0100402 const struct ieee80211_regdomain *r = get_cfg80211_regdom();
Luis R. Rodriguez761cf7e2009-02-21 00:04:25 -0500403
Johannes Berg458f4f92012-12-06 15:47:38 +0100404 if (!r)
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700405 return true;
Johannes Berg458f4f92012-12-06 15:47:38 +0100406 return !alpha2_equal(r->alpha2, alpha2);
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700407}
408
Luis R. Rodriguez09d989d2010-01-29 19:58:57 -0500409/*
410 * The NL80211_REGDOM_SET_BY_USER regdom alpha2 is cached, this lets
411 * you know if a valid regulatory hint with NL80211_REGDOM_SET_BY_USER
412 * has ever been issued.
413 */
414static bool is_user_regdom_saved(void)
415{
416 if (user_alpha2[0] == '9' && user_alpha2[1] == '7')
417 return false;
418
419 /* This would indicate a mistake on the design */
Johannes Berg1a919312012-12-03 17:21:11 +0100420 if (WARN(!is_world_regdom(user_alpha2) && !is_an_alpha2(user_alpha2),
Luis R. Rodriguez09d989d2010-01-29 19:58:57 -0500421 "Unexpected user alpha2: %c%c\n",
Johannes Berg1a919312012-12-03 17:21:11 +0100422 user_alpha2[0], user_alpha2[1]))
Luis R. Rodriguez09d989d2010-01-29 19:58:57 -0500423 return false;
424
425 return true;
426}
427
Johannes Berge9763c32012-12-03 16:59:46 +0100428static const struct ieee80211_regdomain *
429reg_copy_regd(const struct ieee80211_regdomain *src_regd)
John W. Linville3b377ea2009-12-18 17:59:01 -0500430{
431 struct ieee80211_regdomain *regd;
Johannes Berge9763c32012-12-03 16:59:46 +0100432 int size_of_regd;
John W. Linville3b377ea2009-12-18 17:59:01 -0500433 unsigned int i;
434
Johannes Berg82f20852012-12-04 12:49:16 +0100435 size_of_regd =
436 sizeof(struct ieee80211_regdomain) +
437 src_regd->n_reg_rules * sizeof(struct ieee80211_reg_rule);
John W. Linville3b377ea2009-12-18 17:59:01 -0500438
439 regd = kzalloc(size_of_regd, GFP_KERNEL);
440 if (!regd)
Johannes Berge9763c32012-12-03 16:59:46 +0100441 return ERR_PTR(-ENOMEM);
John W. Linville3b377ea2009-12-18 17:59:01 -0500442
443 memcpy(regd, src_regd, sizeof(struct ieee80211_regdomain));
444
445 for (i = 0; i < src_regd->n_reg_rules; i++)
446 memcpy(&regd->reg_rules[i], &src_regd->reg_rules[i],
Johannes Berge9763c32012-12-03 16:59:46 +0100447 sizeof(struct ieee80211_reg_rule));
John W. Linville3b377ea2009-12-18 17:59:01 -0500448
Johannes Berge9763c32012-12-03 16:59:46 +0100449 return regd;
John W. Linville3b377ea2009-12-18 17:59:01 -0500450}
451
452#ifdef CONFIG_CFG80211_INTERNAL_REGDB
Johannes Bergc7d319e2015-10-15 09:03:05 +0200453struct reg_regdb_apply_request {
John W. Linville3b377ea2009-12-18 17:59:01 -0500454 struct list_head list;
Johannes Bergc7d319e2015-10-15 09:03:05 +0200455 const struct ieee80211_regdomain *regdom;
John W. Linville3b377ea2009-12-18 17:59:01 -0500456};
457
Johannes Bergc7d319e2015-10-15 09:03:05 +0200458static LIST_HEAD(reg_regdb_apply_list);
459static DEFINE_MUTEX(reg_regdb_apply_mutex);
John W. Linville3b377ea2009-12-18 17:59:01 -0500460
Johannes Bergc7d319e2015-10-15 09:03:05 +0200461static void reg_regdb_apply(struct work_struct *work)
John W. Linville3b377ea2009-12-18 17:59:01 -0500462{
Johannes Bergc7d319e2015-10-15 09:03:05 +0200463 struct reg_regdb_apply_request *request;
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
Johannes Bergc7d319e2015-10-15 09:03:05 +0200467 mutex_lock(&reg_regdb_apply_mutex);
468 while (!list_empty(&reg_regdb_apply_list)) {
469 request = list_first_entry(&reg_regdb_apply_list,
470 struct reg_regdb_apply_request,
John W. Linville3b377ea2009-12-18 17:59:01 -0500471 list);
472 list_del(&request->list);
473
Johannes Bergc7d319e2015-10-15 09:03:05 +0200474 set_regdom(request->regdom, REGD_SOURCE_INTERNAL_DB);
John W. Linville3b377ea2009-12-18 17:59:01 -0500475 kfree(request);
476 }
Johannes Bergc7d319e2015-10-15 09:03:05 +0200477 mutex_unlock(&reg_regdb_apply_mutex);
Luis R. Rodrigueza85d0d72012-09-14 15:36:57 -0700478
Johannes Berg5fe231e2013-05-08 21:45:15 +0200479 rtnl_unlock();
John W. Linville3b377ea2009-12-18 17:59:01 -0500480}
481
Johannes Bergc7d319e2015-10-15 09:03:05 +0200482static DECLARE_WORK(reg_regdb_work, reg_regdb_apply);
John W. Linville3b377ea2009-12-18 17:59:01 -0500483
Johannes Bergfd453d32015-10-15 10:22:12 +0200484static int reg_query_builtin(const char *alpha2)
John W. Linville3b377ea2009-12-18 17:59:01 -0500485{
Johannes Bergc7d319e2015-10-15 09:03:05 +0200486 const struct ieee80211_regdomain *regdom = NULL;
487 struct reg_regdb_apply_request *request;
488 unsigned int i;
John W. Linville3b377ea2009-12-18 17:59:01 -0500489
Johannes Bergc7d319e2015-10-15 09:03:05 +0200490 for (i = 0; i < reg_regdb_size; i++) {
491 if (alpha2_equal(alpha2, reg_regdb[i]->alpha2)) {
492 regdom = reg_regdb[i];
493 break;
494 }
495 }
496
497 if (!regdom)
498 return -ENODATA;
499
500 request = kzalloc(sizeof(struct reg_regdb_apply_request), GFP_KERNEL);
John W. Linville3b377ea2009-12-18 17:59:01 -0500501 if (!request)
Johannes Bergc7d319e2015-10-15 09:03:05 +0200502 return -ENOMEM;
John W. Linville3b377ea2009-12-18 17:59:01 -0500503
Johannes Bergc7d319e2015-10-15 09:03:05 +0200504 request->regdom = reg_copy_regd(regdom);
505 if (IS_ERR_OR_NULL(request->regdom)) {
506 kfree(request);
507 return -ENOMEM;
508 }
John W. Linville3b377ea2009-12-18 17:59:01 -0500509
Johannes Bergc7d319e2015-10-15 09:03:05 +0200510 mutex_lock(&reg_regdb_apply_mutex);
511 list_add_tail(&request->list, &reg_regdb_apply_list);
512 mutex_unlock(&reg_regdb_apply_mutex);
John W. Linville3b377ea2009-12-18 17:59:01 -0500513
514 schedule_work(&reg_regdb_work);
Johannes Bergc7d319e2015-10-15 09:03:05 +0200515
516 return 0;
John W. Linville3b377ea2009-12-18 17:59:01 -0500517}
Luis R. Rodriguez80007ef2012-03-23 07:23:31 -0700518
519/* Feel free to add any other sanity checks here */
520static void reg_regdb_size_check(void)
521{
522 /* We should ideally BUILD_BUG_ON() but then random builds would fail */
523 WARN_ONCE(!reg_regdb_size, "db.txt is empty, you should update it...");
524}
John W. Linville3b377ea2009-12-18 17:59:01 -0500525#else
Luis R. Rodriguez80007ef2012-03-23 07:23:31 -0700526static inline void reg_regdb_size_check(void) {}
Johannes Bergfd453d32015-10-15 10:22:12 +0200527static inline int reg_query_builtin(const char *alpha2)
Johannes Bergc7d319e2015-10-15 09:03:05 +0200528{
529 return -ENODATA;
530}
John W. Linville3b377ea2009-12-18 17:59:01 -0500531#endif /* CONFIG_CFG80211_INTERNAL_REGDB */
532
Johannes Bergb6863032015-10-15 09:25:18 +0200533#ifdef CONFIG_CFG80211_CRDA_SUPPORT
534/* Max number of consecutive attempts to communicate with CRDA */
535#define REG_MAX_CRDA_TIMEOUTS 10
536
537static u32 reg_crda_timeouts;
538
539static void crda_timeout_work(struct work_struct *work);
540static DECLARE_DELAYED_WORK(crda_timeout, crda_timeout_work);
541
542static void crda_timeout_work(struct work_struct *work)
543{
544 REG_DBG_PRINT("Timeout while waiting for CRDA to reply, restoring regulatory settings\n");
545 rtnl_lock();
546 reg_crda_timeouts++;
547 restore_regulatory_settings(true);
548 rtnl_unlock();
549}
550
551static void cancel_crda_timeout(void)
552{
553 cancel_delayed_work(&crda_timeout);
554}
555
556static void cancel_crda_timeout_sync(void)
557{
558 cancel_delayed_work_sync(&crda_timeout);
559}
560
561static void reset_crda_timeouts(void)
562{
563 reg_crda_timeouts = 0;
564}
565
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -0500566/*
567 * This lets us keep regulatory code which is updated on a regulatory
Johannes Berg1226d252014-02-25 15:43:36 +0100568 * basis in userspace.
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -0500569 */
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700570static int call_crda(const char *alpha2)
571{
Johannes Berg1226d252014-02-25 15:43:36 +0100572 char country[12];
573 char *env[] = { country, NULL };
Johannes Bergc7d319e2015-10-15 09:03:05 +0200574 int ret;
Johannes Berg1226d252014-02-25 15:43:36 +0100575
576 snprintf(country, sizeof(country), "COUNTRY=%c%c",
577 alpha2[0], alpha2[1]);
578
Ilan peerc37722b2015-03-30 15:15:49 +0300579 if (reg_crda_timeouts > REG_MAX_CRDA_TIMEOUTS) {
Thomas Petazzoni042ab5f2015-07-09 15:35:15 +0200580 pr_debug("Exceeded CRDA call max attempts. Not calling CRDA\n");
Ilan peerc37722b2015-03-30 15:15:49 +0300581 return -EINVAL;
582 }
583
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700584 if (!is_world_regdom((char *) alpha2))
Thomas Petazzoni042ab5f2015-07-09 15:35:15 +0200585 pr_debug("Calling CRDA for country: %c%c\n",
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700586 alpha2[0], alpha2[1]);
587 else
Thomas Petazzoni042ab5f2015-07-09 15:35:15 +0200588 pr_debug("Calling CRDA to update world regulatory domain\n");
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700589
Johannes Bergc7d319e2015-10-15 09:03:05 +0200590 ret = kobject_uevent_env(&reg_pdev->dev.kobj, KOBJ_CHANGE, env);
591 if (ret)
592 return ret;
593
594 queue_delayed_work(system_power_efficient_wq,
Johannes Bergb6863032015-10-15 09:25:18 +0200595 &crda_timeout, msecs_to_jiffies(3142));
Johannes Bergc7d319e2015-10-15 09:03:05 +0200596 return 0;
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700597}
Johannes Bergb6863032015-10-15 09:25:18 +0200598#else
599static inline void cancel_crda_timeout(void) {}
600static inline void cancel_crda_timeout_sync(void) {}
601static inline void reset_crda_timeouts(void) {}
602static inline int call_crda(const char *alpha2)
603{
604 return -ENODATA;
605}
606#endif /* CONFIG_CFG80211_CRDA_SUPPORT */
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700607
Johannes Bergcecbb062015-10-15 08:47:34 +0200608static bool reg_query_database(struct regulatory_request *request)
Luis R. Rodriguezfe6631f2013-11-05 09:18:10 -0800609{
Johannes Bergc7d319e2015-10-15 09:03:05 +0200610 /* query internal regulatory database (if it exists) */
Johannes Bergfd453d32015-10-15 10:22:12 +0200611 if (reg_query_builtin(request->alpha2) == 0)
Johannes Bergc7d319e2015-10-15 09:03:05 +0200612 return true;
Ilan peereeca9fc2015-03-04 00:32:07 -0500613
Johannes Bergc7d319e2015-10-15 09:03:05 +0200614 if (call_crda(request->alpha2) == 0)
615 return true;
616
617 return false;
Luis R. Rodriguezfe6631f2013-11-05 09:18:10 -0800618}
619
Luis R. Rodrigueze4387682013-11-05 09:18:01 -0800620bool reg_is_valid_request(const char *alpha2)
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700621{
Johannes Bergc492db32012-12-06 16:29:25 +0100622 struct regulatory_request *lr = get_last_request();
Luis R. Rodriguez61405e92009-05-13 17:04:41 -0400623
Johannes Bergc492db32012-12-06 16:29:25 +0100624 if (!lr || lr->processed)
Johannes Bergf6037d02008-10-21 11:01:33 +0200625 return false;
626
Johannes Bergc492db32012-12-06 16:29:25 +0100627 return alpha2_equal(lr->alpha2, alpha2);
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700628}
629
Janusz Dziedzice3961af2014-01-25 11:24:11 +0100630static const struct ieee80211_regdomain *reg_get_regdomain(struct wiphy *wiphy)
631{
632 struct regulatory_request *lr = get_last_request();
633
634 /*
635 * Follow the driver's regulatory domain, if present, unless a country
636 * IE has been processed or a user wants to help complaince further
637 */
638 if (lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE &&
639 lr->initiator != NL80211_REGDOM_SET_BY_USER &&
640 wiphy->regd)
641 return get_wiphy_regdom(wiphy);
642
643 return get_cfg80211_regdom();
644}
645
Arik Nemtsova6d4a532014-10-23 09:37:33 +0300646static unsigned int
647reg_get_max_bandwidth_from_range(const struct ieee80211_regdomain *rd,
648 const struct ieee80211_reg_rule *rule)
Janusz Dziedzic97524822014-01-30 09:52:20 +0100649{
650 const struct ieee80211_freq_range *freq_range = &rule->freq_range;
651 const struct ieee80211_freq_range *freq_range_tmp;
652 const struct ieee80211_reg_rule *tmp;
653 u32 start_freq, end_freq, idx, no;
654
655 for (idx = 0; idx < rd->n_reg_rules; idx++)
656 if (rule == &rd->reg_rules[idx])
657 break;
658
659 if (idx == rd->n_reg_rules)
660 return 0;
661
662 /* get start_freq */
663 no = idx;
664
665 while (no) {
666 tmp = &rd->reg_rules[--no];
667 freq_range_tmp = &tmp->freq_range;
668
669 if (freq_range_tmp->end_freq_khz < freq_range->start_freq_khz)
670 break;
671
Janusz Dziedzic97524822014-01-30 09:52:20 +0100672 freq_range = freq_range_tmp;
673 }
674
675 start_freq = freq_range->start_freq_khz;
676
677 /* get end_freq */
678 freq_range = &rule->freq_range;
679 no = idx;
680
681 while (no < rd->n_reg_rules - 1) {
682 tmp = &rd->reg_rules[++no];
683 freq_range_tmp = &tmp->freq_range;
684
685 if (freq_range_tmp->start_freq_khz > freq_range->end_freq_khz)
686 break;
687
Janusz Dziedzic97524822014-01-30 09:52:20 +0100688 freq_range = freq_range_tmp;
689 }
690
691 end_freq = freq_range->end_freq_khz;
692
693 return end_freq - start_freq;
694}
695
Arik Nemtsova6d4a532014-10-23 09:37:33 +0300696unsigned int reg_get_max_bandwidth(const struct ieee80211_regdomain *rd,
697 const struct ieee80211_reg_rule *rule)
698{
699 unsigned int bw = reg_get_max_bandwidth_from_range(rd, rule);
700
701 if (rule->flags & NL80211_RRF_NO_160MHZ)
702 bw = min_t(unsigned int, bw, MHZ_TO_KHZ(80));
703 if (rule->flags & NL80211_RRF_NO_80MHZ)
704 bw = min_t(unsigned int, bw, MHZ_TO_KHZ(40));
705
706 /*
707 * HT40+/HT40- limits are handled per-channel. Only limit BW if both
708 * are not allowed.
709 */
710 if (rule->flags & NL80211_RRF_NO_HT40MINUS &&
711 rule->flags & NL80211_RRF_NO_HT40PLUS)
712 bw = min_t(unsigned int, bw, MHZ_TO_KHZ(20));
713
714 return bw;
715}
716
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700717/* Sanity check on a regulatory rule */
Johannes Berga3d2eaf2008-09-15 11:10:52 +0200718static bool is_valid_reg_rule(const struct ieee80211_reg_rule *rule)
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700719{
Johannes Berga3d2eaf2008-09-15 11:10:52 +0200720 const struct ieee80211_freq_range *freq_range = &rule->freq_range;
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700721 u32 freq_diff;
722
Luis R. Rodriguez91e99002008-11-12 14:21:55 -0800723 if (freq_range->start_freq_khz <= 0 || freq_range->end_freq_khz <= 0)
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700724 return false;
725
726 if (freq_range->start_freq_khz > freq_range->end_freq_khz)
727 return false;
728
729 freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz;
730
Roel Kluinbd05f282009-03-03 22:55:21 +0100731 if (freq_range->end_freq_khz <= freq_range->start_freq_khz ||
Johannes Berg1a919312012-12-03 17:21:11 +0100732 freq_range->max_bandwidth_khz > freq_diff)
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700733 return false;
734
735 return true;
736}
737
Johannes Berga3d2eaf2008-09-15 11:10:52 +0200738static bool is_valid_rd(const struct ieee80211_regdomain *rd)
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700739{
Johannes Berga3d2eaf2008-09-15 11:10:52 +0200740 const struct ieee80211_reg_rule *reg_rule = NULL;
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700741 unsigned int i;
742
743 if (!rd->n_reg_rules)
744 return false;
745
Luis R. Rodriguez88dc1c32008-11-12 14:22:01 -0800746 if (WARN_ON(rd->n_reg_rules > NL80211_MAX_SUPP_REG_RULES))
747 return false;
748
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700749 for (i = 0; i < rd->n_reg_rules; i++) {
750 reg_rule = &rd->reg_rules[i];
751 if (!is_valid_reg_rule(reg_rule))
752 return false;
753 }
754
755 return true;
756}
757
Luis R. Rodriguez038659e2009-05-02 00:37:17 -0400758static bool reg_does_bw_fit(const struct ieee80211_freq_range *freq_range,
Johannes Bergfe7ef5e2012-12-04 15:07:34 +0100759 u32 center_freq_khz, u32 bw_khz)
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700760{
Luis R. Rodriguez038659e2009-05-02 00:37:17 -0400761 u32 start_freq_khz, end_freq_khz;
762
763 start_freq_khz = center_freq_khz - (bw_khz/2);
764 end_freq_khz = center_freq_khz + (bw_khz/2);
765
766 if (start_freq_khz >= freq_range->start_freq_khz &&
767 end_freq_khz <= freq_range->end_freq_khz)
768 return true;
769
770 return false;
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700771}
772
Luis R. Rodriguez0c7dc452009-01-07 17:43:36 -0800773/**
774 * freq_in_rule_band - tells us if a frequency is in a frequency band
775 * @freq_range: frequency rule we want to query
776 * @freq_khz: frequency we are inquiring about
777 *
778 * This lets us know if a specific frequency rule is or is not relevant to
779 * a specific frequency's band. Bands are device specific and artificial
Vladimir Kondratiev64629b92012-09-23 09:49:54 +0200780 * definitions (the "2.4 GHz band", the "5 GHz band" and the "60GHz band"),
781 * however it is safe for now to assume that a frequency rule should not be
782 * part of a frequency's band if the start freq or end freq are off by more
783 * than 2 GHz for the 2.4 and 5 GHz bands, and by more than 10 GHz for the
784 * 60 GHz band.
Luis R. Rodriguez0c7dc452009-01-07 17:43:36 -0800785 * This resolution can be lowered and should be considered as we add
786 * regulatory rule support for other "bands".
787 **/
788static bool freq_in_rule_band(const struct ieee80211_freq_range *freq_range,
Johannes Berg1a919312012-12-03 17:21:11 +0100789 u32 freq_khz)
Luis R. Rodriguez0c7dc452009-01-07 17:43:36 -0800790{
791#define ONE_GHZ_IN_KHZ 1000000
Vladimir Kondratiev64629b92012-09-23 09:49:54 +0200792 /*
793 * From 802.11ad: directional multi-gigabit (DMG):
794 * Pertaining to operation in a frequency band containing a channel
795 * with the Channel starting frequency above 45 GHz.
796 */
797 u32 limit = freq_khz > 45 * ONE_GHZ_IN_KHZ ?
798 10 * ONE_GHZ_IN_KHZ : 2 * ONE_GHZ_IN_KHZ;
799 if (abs(freq_khz - freq_range->start_freq_khz) <= limit)
Luis R. Rodriguez0c7dc452009-01-07 17:43:36 -0800800 return true;
Vladimir Kondratiev64629b92012-09-23 09:49:54 +0200801 if (abs(freq_khz - freq_range->end_freq_khz) <= limit)
Luis R. Rodriguez0c7dc452009-01-07 17:43:36 -0800802 return true;
803 return false;
804#undef ONE_GHZ_IN_KHZ
805}
806
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -0500807/*
Luis R. Rodriguezadbfb052013-11-13 18:54:03 +0100808 * Later on we can perhaps use the more restrictive DFS
809 * region but we don't have information for that yet so
810 * for now simply disallow conflicts.
811 */
812static enum nl80211_dfs_regions
813reg_intersect_dfs_region(const enum nl80211_dfs_regions dfs_region1,
814 const enum nl80211_dfs_regions dfs_region2)
815{
816 if (dfs_region1 != dfs_region2)
817 return NL80211_DFS_UNSET;
818 return dfs_region1;
819}
820
821/*
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -0500822 * Helper for regdom_intersect(), this does the real
823 * mathematical intersection fun
824 */
Janusz Dziedzic97524822014-01-30 09:52:20 +0100825static int reg_rules_intersect(const struct ieee80211_regdomain *rd1,
826 const struct ieee80211_regdomain *rd2,
827 const struct ieee80211_reg_rule *rule1,
Johannes Berg1a919312012-12-03 17:21:11 +0100828 const struct ieee80211_reg_rule *rule2,
829 struct ieee80211_reg_rule *intersected_rule)
Luis R. Rodriguez9c964772008-10-30 13:33:53 -0700830{
831 const struct ieee80211_freq_range *freq_range1, *freq_range2;
832 struct ieee80211_freq_range *freq_range;
833 const struct ieee80211_power_rule *power_rule1, *power_rule2;
834 struct ieee80211_power_rule *power_rule;
Janusz Dziedzic97524822014-01-30 09:52:20 +0100835 u32 freq_diff, max_bandwidth1, max_bandwidth2;
Luis R. Rodriguez9c964772008-10-30 13:33:53 -0700836
837 freq_range1 = &rule1->freq_range;
838 freq_range2 = &rule2->freq_range;
839 freq_range = &intersected_rule->freq_range;
840
841 power_rule1 = &rule1->power_rule;
842 power_rule2 = &rule2->power_rule;
843 power_rule = &intersected_rule->power_rule;
844
845 freq_range->start_freq_khz = max(freq_range1->start_freq_khz,
Johannes Berg1a919312012-12-03 17:21:11 +0100846 freq_range2->start_freq_khz);
Luis R. Rodriguez9c964772008-10-30 13:33:53 -0700847 freq_range->end_freq_khz = min(freq_range1->end_freq_khz,
Johannes Berg1a919312012-12-03 17:21:11 +0100848 freq_range2->end_freq_khz);
Janusz Dziedzic97524822014-01-30 09:52:20 +0100849
850 max_bandwidth1 = freq_range1->max_bandwidth_khz;
851 max_bandwidth2 = freq_range2->max_bandwidth_khz;
852
Janusz Dziedzicb0dfd2e2014-02-20 13:52:16 +0100853 if (rule1->flags & NL80211_RRF_AUTO_BW)
854 max_bandwidth1 = reg_get_max_bandwidth(rd1, rule1);
855 if (rule2->flags & NL80211_RRF_AUTO_BW)
856 max_bandwidth2 = reg_get_max_bandwidth(rd2, rule2);
Janusz Dziedzic97524822014-01-30 09:52:20 +0100857
858 freq_range->max_bandwidth_khz = min(max_bandwidth1, max_bandwidth2);
Luis R. Rodriguez9c964772008-10-30 13:33:53 -0700859
Janusz Dziedzicb0dfd2e2014-02-20 13:52:16 +0100860 intersected_rule->flags = rule1->flags | rule2->flags;
861
862 /*
863 * In case NL80211_RRF_AUTO_BW requested for both rules
864 * set AUTO_BW in intersected rule also. Next we will
865 * calculate BW correctly in handle_channel function.
866 * In other case remove AUTO_BW flag while we calculate
867 * maximum bandwidth correctly and auto calculation is
868 * not required.
869 */
870 if ((rule1->flags & NL80211_RRF_AUTO_BW) &&
871 (rule2->flags & NL80211_RRF_AUTO_BW))
872 intersected_rule->flags |= NL80211_RRF_AUTO_BW;
873 else
874 intersected_rule->flags &= ~NL80211_RRF_AUTO_BW;
875
Luis R. Rodriguez9c964772008-10-30 13:33:53 -0700876 freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz;
877 if (freq_range->max_bandwidth_khz > freq_diff)
878 freq_range->max_bandwidth_khz = freq_diff;
879
880 power_rule->max_eirp = min(power_rule1->max_eirp,
881 power_rule2->max_eirp);
882 power_rule->max_antenna_gain = min(power_rule1->max_antenna_gain,
883 power_rule2->max_antenna_gain);
884
Janusz Dziedzic089027e2014-02-21 19:46:12 +0100885 intersected_rule->dfs_cac_ms = max(rule1->dfs_cac_ms,
886 rule2->dfs_cac_ms);
887
Luis R. Rodriguez9c964772008-10-30 13:33:53 -0700888 if (!is_valid_reg_rule(intersected_rule))
889 return -EINVAL;
890
891 return 0;
892}
893
Eliad Pellera62a1ae2014-09-03 15:25:03 +0300894/* check whether old rule contains new rule */
895static bool rule_contains(struct ieee80211_reg_rule *r1,
896 struct ieee80211_reg_rule *r2)
897{
898 /* for simplicity, currently consider only same flags */
899 if (r1->flags != r2->flags)
900 return false;
901
902 /* verify r1 is more restrictive */
903 if ((r1->power_rule.max_antenna_gain >
904 r2->power_rule.max_antenna_gain) ||
905 r1->power_rule.max_eirp > r2->power_rule.max_eirp)
906 return false;
907
908 /* make sure r2's range is contained within r1 */
909 if (r1->freq_range.start_freq_khz > r2->freq_range.start_freq_khz ||
910 r1->freq_range.end_freq_khz < r2->freq_range.end_freq_khz)
911 return false;
912
913 /* and finally verify that r1.max_bw >= r2.max_bw */
914 if (r1->freq_range.max_bandwidth_khz <
915 r2->freq_range.max_bandwidth_khz)
916 return false;
917
918 return true;
919}
920
921/* add or extend current rules. do nothing if rule is already contained */
922static void add_rule(struct ieee80211_reg_rule *rule,
923 struct ieee80211_reg_rule *reg_rules, u32 *n_rules)
924{
925 struct ieee80211_reg_rule *tmp_rule;
926 int i;
927
928 for (i = 0; i < *n_rules; i++) {
929 tmp_rule = &reg_rules[i];
930 /* rule is already contained - do nothing */
931 if (rule_contains(tmp_rule, rule))
932 return;
933
934 /* extend rule if possible */
935 if (rule_contains(rule, tmp_rule)) {
936 memcpy(tmp_rule, rule, sizeof(*rule));
937 return;
938 }
939 }
940
941 memcpy(&reg_rules[*n_rules], rule, sizeof(*rule));
942 (*n_rules)++;
943}
944
Luis R. Rodriguez9c964772008-10-30 13:33:53 -0700945/**
946 * regdom_intersect - do the intersection between two regulatory domains
947 * @rd1: first regulatory domain
948 * @rd2: second regulatory domain
949 *
950 * Use this function to get the intersection between two regulatory domains.
951 * Once completed we will mark the alpha2 for the rd as intersected, "98",
952 * as no one single alpha2 can represent this regulatory domain.
953 *
954 * Returns a pointer to the regulatory domain structure which will hold the
955 * resulting intersection of rules between rd1 and rd2. We will
956 * kzalloc() this structure for you.
957 */
Johannes Berg1a919312012-12-03 17:21:11 +0100958static struct ieee80211_regdomain *
959regdom_intersect(const struct ieee80211_regdomain *rd1,
960 const struct ieee80211_regdomain *rd2)
Luis R. Rodriguez9c964772008-10-30 13:33:53 -0700961{
962 int r, size_of_regd;
963 unsigned int x, y;
Eliad Pellera62a1ae2014-09-03 15:25:03 +0300964 unsigned int num_rules = 0;
Luis R. Rodriguez9c964772008-10-30 13:33:53 -0700965 const struct ieee80211_reg_rule *rule1, *rule2;
Eliad Pellera62a1ae2014-09-03 15:25:03 +0300966 struct ieee80211_reg_rule intersected_rule;
Luis R. Rodriguez9c964772008-10-30 13:33:53 -0700967 struct ieee80211_regdomain *rd;
Luis R. Rodriguez9c964772008-10-30 13:33:53 -0700968
969 if (!rd1 || !rd2)
970 return NULL;
971
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -0500972 /*
973 * First we get a count of the rules we'll need, then we actually
Luis R. Rodriguez9c964772008-10-30 13:33:53 -0700974 * build them. This is to so we can malloc() and free() a
975 * regdomain once. The reason we use reg_rules_intersect() here
976 * is it will return -EINVAL if the rule computed makes no sense.
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -0500977 * All rules that do check out OK are valid.
978 */
Luis R. Rodriguez9c964772008-10-30 13:33:53 -0700979
980 for (x = 0; x < rd1->n_reg_rules; x++) {
981 rule1 = &rd1->reg_rules[x];
982 for (y = 0; y < rd2->n_reg_rules; y++) {
983 rule2 = &rd2->reg_rules[y];
Janusz Dziedzic97524822014-01-30 09:52:20 +0100984 if (!reg_rules_intersect(rd1, rd2, rule1, rule2,
Eliad Pellera62a1ae2014-09-03 15:25:03 +0300985 &intersected_rule))
Luis R. Rodriguez9c964772008-10-30 13:33:53 -0700986 num_rules++;
Luis R. Rodriguez9c964772008-10-30 13:33:53 -0700987 }
988 }
989
990 if (!num_rules)
991 return NULL;
992
993 size_of_regd = sizeof(struct ieee80211_regdomain) +
Johannes Berg82f20852012-12-04 12:49:16 +0100994 num_rules * sizeof(struct ieee80211_reg_rule);
Luis R. Rodriguez9c964772008-10-30 13:33:53 -0700995
996 rd = kzalloc(size_of_regd, GFP_KERNEL);
997 if (!rd)
998 return NULL;
999
Eliad Pellera62a1ae2014-09-03 15:25:03 +03001000 for (x = 0; x < rd1->n_reg_rules; x++) {
Luis R. Rodriguez9c964772008-10-30 13:33:53 -07001001 rule1 = &rd1->reg_rules[x];
Eliad Pellera62a1ae2014-09-03 15:25:03 +03001002 for (y = 0; y < rd2->n_reg_rules; y++) {
Luis R. Rodriguez9c964772008-10-30 13:33:53 -07001003 rule2 = &rd2->reg_rules[y];
Janusz Dziedzic97524822014-01-30 09:52:20 +01001004 r = reg_rules_intersect(rd1, rd2, rule1, rule2,
Eliad Pellera62a1ae2014-09-03 15:25:03 +03001005 &intersected_rule);
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -05001006 /*
1007 * No need to memset here the intersected rule here as
1008 * we're not using the stack anymore
1009 */
Luis R. Rodriguez9c964772008-10-30 13:33:53 -07001010 if (r)
1011 continue;
Eliad Pellera62a1ae2014-09-03 15:25:03 +03001012
1013 add_rule(&intersected_rule, rd->reg_rules,
1014 &rd->n_reg_rules);
Luis R. Rodriguez9c964772008-10-30 13:33:53 -07001015 }
1016 }
1017
Luis R. Rodriguez9c964772008-10-30 13:33:53 -07001018 rd->alpha2[0] = '9';
1019 rd->alpha2[1] = '8';
Luis R. Rodriguezadbfb052013-11-13 18:54:03 +01001020 rd->dfs_region = reg_intersect_dfs_region(rd1->dfs_region,
1021 rd2->dfs_region);
Luis R. Rodriguez9c964772008-10-30 13:33:53 -07001022
1023 return rd;
1024}
1025
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -05001026/*
1027 * XXX: add support for the rest of enum nl80211_reg_rule_flags, we may
1028 * want to just have the channel structure use these
1029 */
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07001030static u32 map_regdom_flags(u32 rd_flags)
1031{
1032 u32 channel_flags = 0;
Luis R. Rodriguez8fe02e12013-10-21 19:22:25 +02001033 if (rd_flags & NL80211_RRF_NO_IR_ALL)
1034 channel_flags |= IEEE80211_CHAN_NO_IR;
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07001035 if (rd_flags & NL80211_RRF_DFS)
1036 channel_flags |= IEEE80211_CHAN_RADAR;
Seth Forshee03f6b082012-08-01 15:58:42 -05001037 if (rd_flags & NL80211_RRF_NO_OFDM)
1038 channel_flags |= IEEE80211_CHAN_NO_OFDM;
David Spinadel570dbde2014-02-23 09:12:59 +02001039 if (rd_flags & NL80211_RRF_NO_OUTDOOR)
1040 channel_flags |= IEEE80211_CHAN_INDOOR_ONLY;
Arik Nemtsov06f207f2015-05-06 16:28:31 +03001041 if (rd_flags & NL80211_RRF_IR_CONCURRENT)
1042 channel_flags |= IEEE80211_CHAN_IR_CONCURRENT;
Arik Nemtsova6d4a532014-10-23 09:37:33 +03001043 if (rd_flags & NL80211_RRF_NO_HT40MINUS)
1044 channel_flags |= IEEE80211_CHAN_NO_HT40MINUS;
1045 if (rd_flags & NL80211_RRF_NO_HT40PLUS)
1046 channel_flags |= IEEE80211_CHAN_NO_HT40PLUS;
1047 if (rd_flags & NL80211_RRF_NO_80MHZ)
1048 channel_flags |= IEEE80211_CHAN_NO_80MHZ;
1049 if (rd_flags & NL80211_RRF_NO_160MHZ)
1050 channel_flags |= IEEE80211_CHAN_NO_160MHZ;
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07001051 return channel_flags;
1052}
1053
Johannes Berg361c9c82012-12-06 15:57:14 +01001054static const struct ieee80211_reg_rule *
Michal Sojka49172872015-11-23 19:27:14 +01001055freq_reg_info_regd(u32 center_freq,
Matthias May4edd5692015-07-17 15:28:39 +02001056 const struct ieee80211_regdomain *regd, u32 bw)
Johannes Berg8318d782008-01-24 19:38:38 +01001057{
1058 int i;
Luis R. Rodriguez0c7dc452009-01-07 17:43:36 -08001059 bool band_rule_found = false;
Luis R. Rodriguez038659e2009-05-02 00:37:17 -04001060 bool bw_fits = false;
1061
Luis R. Rodriguez3e0c3ff2009-01-07 17:43:34 -08001062 if (!regd)
Johannes Berg361c9c82012-12-06 15:57:14 +01001063 return ERR_PTR(-EINVAL);
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07001064
Luis R. Rodriguez3e0c3ff2009-01-07 17:43:34 -08001065 for (i = 0; i < regd->n_reg_rules; i++) {
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07001066 const struct ieee80211_reg_rule *rr;
1067 const struct ieee80211_freq_range *fr = NULL;
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07001068
Luis R. Rodriguez3e0c3ff2009-01-07 17:43:34 -08001069 rr = &regd->reg_rules[i];
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07001070 fr = &rr->freq_range;
Luis R. Rodriguez0c7dc452009-01-07 17:43:36 -08001071
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -05001072 /*
1073 * We only need to know if one frequency rule was
Luis R. Rodriguez0c7dc452009-01-07 17:43:36 -08001074 * was in center_freq's band, that's enough, so lets
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -05001075 * not overwrite it once found
1076 */
Luis R. Rodriguez0c7dc452009-01-07 17:43:36 -08001077 if (!band_rule_found)
1078 band_rule_found = freq_in_rule_band(fr, center_freq);
1079
Matthias May4edd5692015-07-17 15:28:39 +02001080 bw_fits = reg_does_bw_fit(fr, center_freq, bw);
Luis R. Rodriguez0c7dc452009-01-07 17:43:36 -08001081
Johannes Berg361c9c82012-12-06 15:57:14 +01001082 if (band_rule_found && bw_fits)
1083 return rr;
Johannes Berg8318d782008-01-24 19:38:38 +01001084 }
1085
Luis R. Rodriguez0c7dc452009-01-07 17:43:36 -08001086 if (!band_rule_found)
Johannes Berg361c9c82012-12-06 15:57:14 +01001087 return ERR_PTR(-ERANGE);
Luis R. Rodriguez0c7dc452009-01-07 17:43:36 -08001088
Johannes Berg361c9c82012-12-06 15:57:14 +01001089 return ERR_PTR(-EINVAL);
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07001090}
1091
Johannes Berg8de1c632015-08-21 14:13:06 +02001092static const struct ieee80211_reg_rule *
1093__freq_reg_info(struct wiphy *wiphy, u32 center_freq, u32 min_bw)
Matthias May4edd5692015-07-17 15:28:39 +02001094{
1095 const struct ieee80211_regdomain *regd = reg_get_regdomain(wiphy);
1096 const struct ieee80211_reg_rule *reg_rule = NULL;
1097 u32 bw;
1098
1099 for (bw = MHZ_TO_KHZ(20); bw >= min_bw; bw = bw / 2) {
Michal Sojka49172872015-11-23 19:27:14 +01001100 reg_rule = freq_reg_info_regd(center_freq, regd, bw);
Matthias May4edd5692015-07-17 15:28:39 +02001101 if (!IS_ERR(reg_rule))
1102 return reg_rule;
1103 }
1104
1105 return reg_rule;
1106}
1107
Johannes Berg361c9c82012-12-06 15:57:14 +01001108const struct ieee80211_reg_rule *freq_reg_info(struct wiphy *wiphy,
1109 u32 center_freq)
Luis R. Rodriguez1fa25e42009-01-22 15:05:44 -08001110{
Matthias May4edd5692015-07-17 15:28:39 +02001111 return __freq_reg_info(wiphy, center_freq, MHZ_TO_KHZ(20));
Luis R. Rodriguez1fa25e42009-01-22 15:05:44 -08001112}
John W. Linville4f366c52010-07-15 14:57:33 -04001113EXPORT_SYMBOL(freq_reg_info);
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07001114
Luis R. Rodriguez034c6d62013-10-14 17:42:06 -07001115const char *reg_initiator_name(enum nl80211_reg_initiator initiator)
Luis R. Rodriguez926a0a02010-10-21 19:17:03 +05301116{
1117 switch (initiator) {
1118 case NL80211_REGDOM_SET_BY_CORE:
Luis R. Rodriguez034c6d62013-10-14 17:42:06 -07001119 return "core";
Luis R. Rodriguez926a0a02010-10-21 19:17:03 +05301120 case NL80211_REGDOM_SET_BY_USER:
Luis R. Rodriguez034c6d62013-10-14 17:42:06 -07001121 return "user";
Luis R. Rodriguez926a0a02010-10-21 19:17:03 +05301122 case NL80211_REGDOM_SET_BY_DRIVER:
Luis R. Rodriguez034c6d62013-10-14 17:42:06 -07001123 return "driver";
Luis R. Rodriguez926a0a02010-10-21 19:17:03 +05301124 case NL80211_REGDOM_SET_BY_COUNTRY_IE:
Luis R. Rodriguez034c6d62013-10-14 17:42:06 -07001125 return "country IE";
Luis R. Rodriguez926a0a02010-10-21 19:17:03 +05301126 default:
1127 WARN_ON(1);
Luis R. Rodriguez034c6d62013-10-14 17:42:06 -07001128 return "bug";
Luis R. Rodriguez926a0a02010-10-21 19:17:03 +05301129 }
1130}
Luis R. Rodriguez034c6d62013-10-14 17:42:06 -07001131EXPORT_SYMBOL(reg_initiator_name);
Luis R. Rodrigueze702d3c2010-10-21 19:17:04 +05301132
Janusz Dziedzicb0dfd2e2014-02-20 13:52:16 +01001133static void chan_reg_rule_print_dbg(const struct ieee80211_regdomain *regd,
1134 struct ieee80211_channel *chan,
Luis R. Rodrigueze702d3c2010-10-21 19:17:04 +05301135 const struct ieee80211_reg_rule *reg_rule)
1136{
Johannes Berg81e92572015-10-15 14:27:04 +02001137#ifdef CONFIG_CFG80211_REG_DEBUG
Luis R. Rodrigueze702d3c2010-10-21 19:17:04 +05301138 const struct ieee80211_power_rule *power_rule;
1139 const struct ieee80211_freq_range *freq_range;
Janusz Dziedzicb0dfd2e2014-02-20 13:52:16 +01001140 char max_antenna_gain[32], bw[32];
Luis R. Rodrigueze702d3c2010-10-21 19:17:04 +05301141
1142 power_rule = &reg_rule->power_rule;
1143 freq_range = &reg_rule->freq_range;
1144
1145 if (!power_rule->max_antenna_gain)
Janusz Dziedzicb0dfd2e2014-02-20 13:52:16 +01001146 snprintf(max_antenna_gain, sizeof(max_antenna_gain), "N/A");
Luis R. Rodrigueze702d3c2010-10-21 19:17:04 +05301147 else
Johannes Berg9f5068022015-10-15 13:35:45 +02001148 snprintf(max_antenna_gain, sizeof(max_antenna_gain), "%d mBi",
Janusz Dziedzicb0dfd2e2014-02-20 13:52:16 +01001149 power_rule->max_antenna_gain);
1150
1151 if (reg_rule->flags & NL80211_RRF_AUTO_BW)
1152 snprintf(bw, sizeof(bw), "%d KHz, %d KHz AUTO",
1153 freq_range->max_bandwidth_khz,
1154 reg_get_max_bandwidth(regd, reg_rule));
1155 else
1156 snprintf(bw, sizeof(bw), "%d KHz",
1157 freq_range->max_bandwidth_khz);
Luis R. Rodrigueze702d3c2010-10-21 19:17:04 +05301158
Johannes Bergfe7ef5e2012-12-04 15:07:34 +01001159 REG_DBG_PRINT("Updating information on frequency %d MHz with regulatory rule:\n",
1160 chan->center_freq);
Luis R. Rodrigueze702d3c2010-10-21 19:17:04 +05301161
Johannes Berg9f5068022015-10-15 13:35:45 +02001162 REG_DBG_PRINT("(%d KHz - %d KHz @ %s), (%s, %d mBm)\n",
Johannes Berg1a919312012-12-03 17:21:11 +01001163 freq_range->start_freq_khz, freq_range->end_freq_khz,
Janusz Dziedzicb0dfd2e2014-02-20 13:52:16 +01001164 bw, max_antenna_gain,
Luis R. Rodrigueze702d3c2010-10-21 19:17:04 +05301165 power_rule->max_eirp);
Luis R. Rodriguez926a0a02010-10-21 19:17:03 +05301166#endif
Johannes Berg81e92572015-10-15 14:27:04 +02001167}
Luis R. Rodriguez926a0a02010-10-21 19:17:03 +05301168
Johannes Berge33e2242014-06-23 11:06:16 +02001169/*
1170 * Note that right now we assume the desired channel bandwidth
1171 * is always 20 MHz for each individual channel (HT40 uses 20 MHz
1172 * per channel, the primary and the extension channel).
Luis R. Rodriguez038659e2009-05-02 00:37:17 -04001173 */
Luis R. Rodriguez7ca43d02010-10-20 10:18:53 -07001174static void handle_channel(struct wiphy *wiphy,
1175 enum nl80211_reg_initiator initiator,
Johannes Bergfdc9d7b2012-12-03 18:36:09 +01001176 struct ieee80211_channel *chan)
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07001177{
Luis R. Rodriguez038659e2009-05-02 00:37:17 -04001178 u32 flags, bw_flags = 0;
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07001179 const struct ieee80211_reg_rule *reg_rule = NULL;
1180 const struct ieee80211_power_rule *power_rule = NULL;
Luis R. Rodriguez038659e2009-05-02 00:37:17 -04001181 const struct ieee80211_freq_range *freq_range = NULL;
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05001182 struct wiphy *request_wiphy = NULL;
Johannes Bergc492db32012-12-06 16:29:25 +01001183 struct regulatory_request *lr = get_last_request();
Janusz Dziedzic97524822014-01-30 09:52:20 +01001184 const struct ieee80211_regdomain *regd;
1185 u32 max_bandwidth_khz;
Luis R. Rodrigueza92a3ce2009-01-07 17:43:33 -08001186
Johannes Bergc492db32012-12-06 16:29:25 +01001187 request_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx);
Luis R. Rodrigueza92a3ce2009-01-07 17:43:33 -08001188
1189 flags = chan->orig_flags;
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07001190
Johannes Berg361c9c82012-12-06 15:57:14 +01001191 reg_rule = freq_reg_info(wiphy, MHZ_TO_KHZ(chan->center_freq));
1192 if (IS_ERR(reg_rule)) {
Luis R. Rodriguezca4ffe82010-10-20 10:18:55 -07001193 /*
1194 * We will disable all channels that do not match our
Lucas De Marchi25985ed2011-03-30 22:57:33 -03001195 * received regulatory rule unless the hint is coming
Luis R. Rodriguezca4ffe82010-10-20 10:18:55 -07001196 * from a Country IE and the Country IE had no information
1197 * about a band. The IEEE 802.11 spec allows for an AP
1198 * to send only a subset of the regulatory rules allowed,
1199 * so an AP in the US that only supports 2.4 GHz may only send
1200 * a country IE with information for the 2.4 GHz band
1201 * while 5 GHz is still supported.
1202 */
1203 if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE &&
Johannes Berg361c9c82012-12-06 15:57:14 +01001204 PTR_ERR(reg_rule) == -ERANGE)
Luis R. Rodriguezca4ffe82010-10-20 10:18:55 -07001205 return;
1206
Luis R. Rodriguezcc493e4f2013-11-06 17:54:44 +01001207 if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER &&
1208 request_wiphy && request_wiphy == wiphy &&
Luis R. Rodrigueza2f73b62013-11-11 22:15:29 +01001209 request_wiphy->regulatory_flags & REGULATORY_STRICT_REG) {
Luis R. Rodriguezcc493e4f2013-11-06 17:54:44 +01001210 REG_DBG_PRINT("Disabling freq %d MHz for good\n",
1211 chan->center_freq);
1212 chan->orig_flags |= IEEE80211_CHAN_DISABLED;
1213 chan->flags = chan->orig_flags;
1214 } else {
1215 REG_DBG_PRINT("Disabling freq %d MHz\n",
1216 chan->center_freq);
1217 chan->flags |= IEEE80211_CHAN_DISABLED;
1218 }
Johannes Berg8318d782008-01-24 19:38:38 +01001219 return;
Luis R. Rodriguezca4ffe82010-10-20 10:18:55 -07001220 }
Johannes Berg8318d782008-01-24 19:38:38 +01001221
Janusz Dziedzicb0dfd2e2014-02-20 13:52:16 +01001222 regd = reg_get_regdomain(wiphy);
1223 chan_reg_rule_print_dbg(regd, chan, reg_rule);
Luis R. Rodrigueze702d3c2010-10-21 19:17:04 +05301224
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07001225 power_rule = &reg_rule->power_rule;
Luis R. Rodriguez038659e2009-05-02 00:37:17 -04001226 freq_range = &reg_rule->freq_range;
1227
Janusz Dziedzic97524822014-01-30 09:52:20 +01001228 max_bandwidth_khz = freq_range->max_bandwidth_khz;
1229 /* Check if auto calculation requested */
Janusz Dziedzicb0dfd2e2014-02-20 13:52:16 +01001230 if (reg_rule->flags & NL80211_RRF_AUTO_BW)
Janusz Dziedzic97524822014-01-30 09:52:20 +01001231 max_bandwidth_khz = reg_get_max_bandwidth(regd, reg_rule);
Janusz Dziedzic97524822014-01-30 09:52:20 +01001232
Matthias May4edd5692015-07-17 15:28:39 +02001233 /* If we get a reg_rule we can assume that at least 5Mhz fit */
1234 if (!reg_does_bw_fit(freq_range, MHZ_TO_KHZ(chan->center_freq),
1235 MHZ_TO_KHZ(10)))
1236 bw_flags |= IEEE80211_CHAN_NO_10MHZ;
1237 if (!reg_does_bw_fit(freq_range, MHZ_TO_KHZ(chan->center_freq),
1238 MHZ_TO_KHZ(20)))
1239 bw_flags |= IEEE80211_CHAN_NO_20MHZ;
1240
1241 if (max_bandwidth_khz < MHZ_TO_KHZ(10))
1242 bw_flags |= IEEE80211_CHAN_NO_10MHZ;
1243 if (max_bandwidth_khz < MHZ_TO_KHZ(20))
1244 bw_flags |= IEEE80211_CHAN_NO_20MHZ;
Janusz Dziedzic97524822014-01-30 09:52:20 +01001245 if (max_bandwidth_khz < MHZ_TO_KHZ(40))
Matthias May4edd5692015-07-17 15:28:39 +02001246 bw_flags |= IEEE80211_CHAN_NO_HT40;
Janusz Dziedzic97524822014-01-30 09:52:20 +01001247 if (max_bandwidth_khz < MHZ_TO_KHZ(80))
Johannes Bergc7a6ee22012-12-12 17:50:39 +01001248 bw_flags |= IEEE80211_CHAN_NO_80MHZ;
Janusz Dziedzic97524822014-01-30 09:52:20 +01001249 if (max_bandwidth_khz < MHZ_TO_KHZ(160))
Johannes Bergc7a6ee22012-12-12 17:50:39 +01001250 bw_flags |= IEEE80211_CHAN_NO_160MHZ;
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07001251
Johannes Bergc492db32012-12-06 16:29:25 +01001252 if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER &&
Luis R. Rodriguez806a9e32009-02-21 00:04:26 -05001253 request_wiphy && request_wiphy == wiphy &&
Luis R. Rodrigueza2f73b62013-11-11 22:15:29 +01001254 request_wiphy->regulatory_flags & REGULATORY_STRICT_REG) {
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -05001255 /*
Lucas De Marchi25985ed2011-03-30 22:57:33 -03001256 * This guarantees the driver's requested regulatory domain
Luis R. Rodriguezf9763762009-01-22 15:05:52 -08001257 * will always be used as a base for further regulatory
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -05001258 * settings
1259 */
Luis R. Rodriguezf9763762009-01-22 15:05:52 -08001260 chan->flags = chan->orig_flags =
Luis R. Rodriguez038659e2009-05-02 00:37:17 -04001261 map_regdom_flags(reg_rule->flags) | bw_flags;
Luis R. Rodriguezf9763762009-01-22 15:05:52 -08001262 chan->max_antenna_gain = chan->orig_mag =
1263 (int) MBI_TO_DBI(power_rule->max_antenna_gain);
Felix Fietkau279f0f52012-10-17 13:56:20 +02001264 chan->max_reg_power = chan->max_power = chan->orig_mpwr =
Luis R. Rodriguezf9763762009-01-22 15:05:52 -08001265 (int) MBM_TO_DBM(power_rule->max_eirp);
Janusz Dziedzic4f267c12014-04-09 13:47:12 +02001266
1267 if (chan->flags & IEEE80211_CHAN_RADAR) {
1268 chan->dfs_cac_ms = IEEE80211_DFS_MIN_CAC_TIME_MS;
1269 if (reg_rule->dfs_cac_ms)
1270 chan->dfs_cac_ms = reg_rule->dfs_cac_ms;
1271 }
1272
Luis R. Rodriguezf9763762009-01-22 15:05:52 -08001273 return;
1274 }
1275
Simon Wunderlich04f39042013-02-08 18:16:19 +01001276 chan->dfs_state = NL80211_DFS_USABLE;
1277 chan->dfs_state_entered = jiffies;
1278
Rajkumar Manoharanaa3d7ee2011-09-14 14:28:17 +05301279 chan->beacon_found = false;
Luis R. Rodriguez038659e2009-05-02 00:37:17 -04001280 chan->flags = flags | bw_flags | map_regdom_flags(reg_rule->flags);
Johannes Berg1a919312012-12-03 17:21:11 +01001281 chan->max_antenna_gain =
1282 min_t(int, chan->orig_mag,
1283 MBI_TO_DBI(power_rule->max_antenna_gain));
Hong Wueccc0682012-01-11 20:33:39 +02001284 chan->max_reg_power = (int) MBM_TO_DBM(power_rule->max_eirp);
Janusz Dziedzic089027e2014-02-21 19:46:12 +01001285
1286 if (chan->flags & IEEE80211_CHAN_RADAR) {
1287 if (reg_rule->dfs_cac_ms)
1288 chan->dfs_cac_ms = reg_rule->dfs_cac_ms;
1289 else
1290 chan->dfs_cac_ms = IEEE80211_DFS_MIN_CAC_TIME_MS;
1291 }
1292
Stanislaw Gruszka5e31fc02012-07-24 08:35:39 +02001293 if (chan->orig_mpwr) {
1294 /*
Luis R. Rodrigueza09a85a2013-11-11 22:15:30 +01001295 * Devices that use REGULATORY_COUNTRY_IE_FOLLOW_POWER
1296 * will always follow the passed country IE power settings.
Stanislaw Gruszka5e31fc02012-07-24 08:35:39 +02001297 */
1298 if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE &&
Luis R. Rodrigueza09a85a2013-11-11 22:15:30 +01001299 wiphy->regulatory_flags & REGULATORY_COUNTRY_IE_FOLLOW_POWER)
Stanislaw Gruszka5e31fc02012-07-24 08:35:39 +02001300 chan->max_power = chan->max_reg_power;
1301 else
1302 chan->max_power = min(chan->orig_mpwr,
1303 chan->max_reg_power);
1304 } else
1305 chan->max_power = chan->max_reg_power;
Johannes Berg8318d782008-01-24 19:38:38 +01001306}
1307
Luis R. Rodriguez7ca43d02010-10-20 10:18:53 -07001308static void handle_band(struct wiphy *wiphy,
Johannes Bergfdc9d7b2012-12-03 18:36:09 +01001309 enum nl80211_reg_initiator initiator,
1310 struct ieee80211_supported_band *sband)
Johannes Berg8318d782008-01-24 19:38:38 +01001311{
Luis R. Rodrigueza92a3ce2009-01-07 17:43:33 -08001312 unsigned int i;
Luis R. Rodrigueza92a3ce2009-01-07 17:43:33 -08001313
Johannes Bergfdc9d7b2012-12-03 18:36:09 +01001314 if (!sband)
1315 return;
Johannes Berg8318d782008-01-24 19:38:38 +01001316
1317 for (i = 0; i < sband->n_channels; i++)
Johannes Bergfdc9d7b2012-12-03 18:36:09 +01001318 handle_channel(wiphy, initiator, &sband->channels[i]);
Johannes Berg8318d782008-01-24 19:38:38 +01001319}
1320
Luis R. Rodriguez57b5ce02012-07-12 11:49:18 -07001321static bool reg_request_cell_base(struct regulatory_request *request)
1322{
1323 if (request->initiator != NL80211_REGDOM_SET_BY_USER)
1324 return false;
Johannes Berg1a919312012-12-03 17:21:11 +01001325 return request->user_reg_hint_type == NL80211_USER_REG_HINT_CELL_BASE;
Luis R. Rodriguez57b5ce02012-07-12 11:49:18 -07001326}
1327
1328bool reg_last_request_cell_base(void)
1329{
Johannes Berg38fd2142013-05-10 19:17:17 +02001330 return reg_request_cell_base(get_last_request());
Luis R. Rodriguez57b5ce02012-07-12 11:49:18 -07001331}
1332
Ilan Peer94fc6612014-02-23 09:13:00 +02001333#ifdef CONFIG_CFG80211_REG_CELLULAR_HINTS
Luis R. Rodriguez57b5ce02012-07-12 11:49:18 -07001334/* Core specific check */
Johannes Berg2f922122012-12-03 17:54:55 +01001335static enum reg_request_treatment
1336reg_ignore_cell_hint(struct regulatory_request *pending_request)
Luis R. Rodriguez57b5ce02012-07-12 11:49:18 -07001337{
Johannes Bergc492db32012-12-06 16:29:25 +01001338 struct regulatory_request *lr = get_last_request();
Luis R. Rodriguez57b5ce02012-07-12 11:49:18 -07001339
Luis R. Rodriguez57b5ce02012-07-12 11:49:18 -07001340 if (!reg_num_devs_support_basehint)
Johannes Berg2f922122012-12-03 17:54:55 +01001341 return REG_REQ_IGNORE;
Luis R. Rodriguez57b5ce02012-07-12 11:49:18 -07001342
Johannes Bergc492db32012-12-06 16:29:25 +01001343 if (reg_request_cell_base(lr) &&
Johannes Berg1a919312012-12-03 17:21:11 +01001344 !regdom_changes(pending_request->alpha2))
Johannes Berg2f922122012-12-03 17:54:55 +01001345 return REG_REQ_ALREADY_SET;
Johannes Berg1a919312012-12-03 17:21:11 +01001346
Johannes Berg2f922122012-12-03 17:54:55 +01001347 return REG_REQ_OK;
Luis R. Rodriguez57b5ce02012-07-12 11:49:18 -07001348}
1349
1350/* Device specific check */
1351static bool reg_dev_ignore_cell_hint(struct wiphy *wiphy)
1352{
Johannes Berg1a919312012-12-03 17:21:11 +01001353 return !(wiphy->features & NL80211_FEATURE_CELL_BASE_REG_HINTS);
Luis R. Rodriguez57b5ce02012-07-12 11:49:18 -07001354}
1355#else
Johannes Berga515de62015-10-15 14:28:56 +02001356static enum reg_request_treatment
1357reg_ignore_cell_hint(struct regulatory_request *pending_request)
Luis R. Rodriguez57b5ce02012-07-12 11:49:18 -07001358{
Johannes Berg2f922122012-12-03 17:54:55 +01001359 return REG_REQ_IGNORE;
Luis R. Rodriguez57b5ce02012-07-12 11:49:18 -07001360}
Johannes Berg1a919312012-12-03 17:21:11 +01001361
1362static bool reg_dev_ignore_cell_hint(struct wiphy *wiphy)
Luis R. Rodriguez57b5ce02012-07-12 11:49:18 -07001363{
1364 return true;
1365}
1366#endif
1367
Luis R. Rodriguezfa1fb9c2013-10-02 18:33:10 -07001368static bool wiphy_strict_alpha2_regd(struct wiphy *wiphy)
1369{
Luis R. Rodrigueza2f73b62013-11-11 22:15:29 +01001370 if (wiphy->regulatory_flags & REGULATORY_STRICT_REG &&
1371 !(wiphy->regulatory_flags & REGULATORY_CUSTOM_REG))
Luis R. Rodriguezfa1fb9c2013-10-02 18:33:10 -07001372 return true;
1373 return false;
1374}
Luis R. Rodriguez57b5ce02012-07-12 11:49:18 -07001375
Luis R. Rodriguez7db90f42009-03-09 22:07:41 -04001376static bool ignore_reg_update(struct wiphy *wiphy,
1377 enum nl80211_reg_initiator initiator)
Luis R. Rodriguez14b98152008-11-12 14:22:03 -08001378{
Johannes Bergc492db32012-12-06 16:29:25 +01001379 struct regulatory_request *lr = get_last_request();
1380
Jonathan Doronb0d7aa52014-12-15 19:26:00 +02001381 if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED)
1382 return true;
1383
Johannes Bergc492db32012-12-06 16:29:25 +01001384 if (!lr) {
Luis R. Rodriguez034c6d62013-10-14 17:42:06 -07001385 REG_DBG_PRINT("Ignoring regulatory request set by %s "
1386 "since last_request is not set\n",
Luis R. Rodriguez926a0a02010-10-21 19:17:03 +05301387 reg_initiator_name(initiator));
Luis R. Rodriguez14b98152008-11-12 14:22:03 -08001388 return true;
Luis R. Rodriguez926a0a02010-10-21 19:17:03 +05301389 }
1390
Luis R. Rodriguez7db90f42009-03-09 22:07:41 -04001391 if (initiator == NL80211_REGDOM_SET_BY_CORE &&
Luis R. Rodrigueza2f73b62013-11-11 22:15:29 +01001392 wiphy->regulatory_flags & REGULATORY_CUSTOM_REG) {
Luis R. Rodriguez034c6d62013-10-14 17:42:06 -07001393 REG_DBG_PRINT("Ignoring regulatory request set by %s "
1394 "since the driver uses its own custom "
1395 "regulatory domain\n",
Luis R. Rodriguez926a0a02010-10-21 19:17:03 +05301396 reg_initiator_name(initiator));
Luis R. Rodriguez14b98152008-11-12 14:22:03 -08001397 return true;
Luis R. Rodriguez926a0a02010-10-21 19:17:03 +05301398 }
1399
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -05001400 /*
1401 * wiphy->regd will be set once the device has its own
1402 * desired regulatory domain set
1403 */
Luis R. Rodriguezfa1fb9c2013-10-02 18:33:10 -07001404 if (wiphy_strict_alpha2_regd(wiphy) && !wiphy->regd &&
Luis R. Rodriguez749b5272010-10-20 10:18:54 -07001405 initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE &&
Johannes Bergc492db32012-12-06 16:29:25 +01001406 !is_world_regdom(lr->alpha2)) {
Luis R. Rodriguez034c6d62013-10-14 17:42:06 -07001407 REG_DBG_PRINT("Ignoring regulatory request set by %s "
1408 "since the driver requires its own regulatory "
1409 "domain to be set first\n",
Luis R. Rodriguez926a0a02010-10-21 19:17:03 +05301410 reg_initiator_name(initiator));
Luis R. Rodriguez14b98152008-11-12 14:22:03 -08001411 return true;
Luis R. Rodriguez926a0a02010-10-21 19:17:03 +05301412 }
1413
Johannes Bergc492db32012-12-06 16:29:25 +01001414 if (reg_request_cell_base(lr))
Luis R. Rodriguez57b5ce02012-07-12 11:49:18 -07001415 return reg_dev_ignore_cell_hint(wiphy);
1416
Luis R. Rodriguez14b98152008-11-12 14:22:03 -08001417 return false;
1418}
1419
Luis R. Rodriguez3195e482012-12-19 10:53:03 -08001420static bool reg_is_world_roaming(struct wiphy *wiphy)
1421{
1422 const struct ieee80211_regdomain *cr = get_cfg80211_regdom();
1423 const struct ieee80211_regdomain *wr = get_wiphy_regdom(wiphy);
1424 struct regulatory_request *lr = get_last_request();
1425
1426 if (is_world_regdom(cr->alpha2) || (wr && is_world_regdom(wr->alpha2)))
1427 return true;
1428
1429 if (lr && lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE &&
Luis R. Rodrigueza2f73b62013-11-11 22:15:29 +01001430 wiphy->regulatory_flags & REGULATORY_CUSTOM_REG)
Luis R. Rodriguez3195e482012-12-19 10:53:03 -08001431 return true;
1432
1433 return false;
1434}
1435
Johannes Berg1a919312012-12-03 17:21:11 +01001436static void handle_reg_beacon(struct wiphy *wiphy, unsigned int chan_idx,
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05001437 struct reg_beacon *reg_beacon)
1438{
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05001439 struct ieee80211_supported_band *sband;
1440 struct ieee80211_channel *chan;
Luis R. Rodriguez6bad8762009-04-02 14:08:09 -04001441 bool channel_changed = false;
1442 struct ieee80211_channel chan_before;
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05001443
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05001444 sband = wiphy->bands[reg_beacon->chan.band];
1445 chan = &sband->channels[chan_idx];
1446
1447 if (likely(chan->center_freq != reg_beacon->chan.center_freq))
1448 return;
1449
Luis R. Rodriguez6bad8762009-04-02 14:08:09 -04001450 if (chan->beacon_found)
1451 return;
1452
1453 chan->beacon_found = true;
1454
Luis R. Rodriguez0f500a52012-12-19 10:53:04 -08001455 if (!reg_is_world_roaming(wiphy))
1456 return;
1457
Luis R. Rodrigueza2f73b62013-11-11 22:15:29 +01001458 if (wiphy->regulatory_flags & REGULATORY_DISABLE_BEACON_HINTS)
Luis R. Rodriguez37184242009-07-30 17:43:48 -07001459 return;
1460
Luis R. Rodriguez6bad8762009-04-02 14:08:09 -04001461 chan_before.center_freq = chan->center_freq;
1462 chan_before.flags = chan->flags;
1463
Luis R. Rodriguez8fe02e12013-10-21 19:22:25 +02001464 if (chan->flags & IEEE80211_CHAN_NO_IR) {
1465 chan->flags &= ~IEEE80211_CHAN_NO_IR;
Luis R. Rodriguez6bad8762009-04-02 14:08:09 -04001466 channel_changed = true;
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05001467 }
1468
Luis R. Rodriguez6bad8762009-04-02 14:08:09 -04001469 if (channel_changed)
1470 nl80211_send_beacon_hint_event(wiphy, &chan_before, chan);
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05001471}
1472
1473/*
1474 * Called when a scan on a wiphy finds a beacon on
1475 * new channel
1476 */
1477static void wiphy_update_new_beacon(struct wiphy *wiphy,
1478 struct reg_beacon *reg_beacon)
1479{
1480 unsigned int i;
1481 struct ieee80211_supported_band *sband;
1482
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05001483 if (!wiphy->bands[reg_beacon->chan.band])
1484 return;
1485
1486 sband = wiphy->bands[reg_beacon->chan.band];
1487
1488 for (i = 0; i < sband->n_channels; i++)
1489 handle_reg_beacon(wiphy, i, reg_beacon);
1490}
1491
1492/*
1493 * Called upon reg changes or a new wiphy is added
1494 */
1495static void wiphy_update_beacon_reg(struct wiphy *wiphy)
1496{
1497 unsigned int i;
1498 struct ieee80211_supported_band *sband;
1499 struct reg_beacon *reg_beacon;
1500
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05001501 list_for_each_entry(reg_beacon, &reg_beacon_list, list) {
1502 if (!wiphy->bands[reg_beacon->chan.band])
1503 continue;
1504 sband = wiphy->bands[reg_beacon->chan.band];
1505 for (i = 0; i < sband->n_channels; i++)
1506 handle_reg_beacon(wiphy, i, reg_beacon);
1507 }
1508}
1509
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05001510/* Reap the advantages of previously found beacons */
1511static void reg_process_beacons(struct wiphy *wiphy)
1512{
Luis R. Rodriguezb1ed8dd2009-05-02 00:34:15 -04001513 /*
1514 * Means we are just firing up cfg80211, so no beacons would
1515 * have been processed yet.
1516 */
1517 if (!last_request)
1518 return;
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05001519 wiphy_update_beacon_reg(wiphy);
1520}
1521
Johannes Berg1a919312012-12-03 17:21:11 +01001522static bool is_ht40_allowed(struct ieee80211_channel *chan)
Luis R. Rodriguez038659e2009-05-02 00:37:17 -04001523{
1524 if (!chan)
Johannes Berg1a919312012-12-03 17:21:11 +01001525 return false;
Luis R. Rodriguez038659e2009-05-02 00:37:17 -04001526 if (chan->flags & IEEE80211_CHAN_DISABLED)
Johannes Berg1a919312012-12-03 17:21:11 +01001527 return false;
Luis R. Rodriguez038659e2009-05-02 00:37:17 -04001528 /* This would happen when regulatory rules disallow HT40 completely */
Felix Fietkau55b183a2013-01-11 14:22:58 +01001529 if ((chan->flags & IEEE80211_CHAN_NO_HT40) == IEEE80211_CHAN_NO_HT40)
1530 return false;
1531 return true;
Luis R. Rodriguez038659e2009-05-02 00:37:17 -04001532}
1533
1534static void reg_process_ht_flags_channel(struct wiphy *wiphy,
Johannes Bergfdc9d7b2012-12-03 18:36:09 +01001535 struct ieee80211_channel *channel)
Luis R. Rodriguez038659e2009-05-02 00:37:17 -04001536{
Johannes Bergfdc9d7b2012-12-03 18:36:09 +01001537 struct ieee80211_supported_band *sband = wiphy->bands[channel->band];
Luis R. Rodriguez038659e2009-05-02 00:37:17 -04001538 struct ieee80211_channel *channel_before = NULL, *channel_after = NULL;
1539 unsigned int i;
1540
Johannes Berg1a919312012-12-03 17:21:11 +01001541 if (!is_ht40_allowed(channel)) {
Luis R. Rodriguez038659e2009-05-02 00:37:17 -04001542 channel->flags |= IEEE80211_CHAN_NO_HT40;
1543 return;
1544 }
1545
1546 /*
1547 * We need to ensure the extension channels exist to
1548 * be able to use HT40- or HT40+, this finds them (or not)
1549 */
1550 for (i = 0; i < sband->n_channels; i++) {
1551 struct ieee80211_channel *c = &sband->channels[i];
Johannes Berg1a919312012-12-03 17:21:11 +01001552
Luis R. Rodriguez038659e2009-05-02 00:37:17 -04001553 if (c->center_freq == (channel->center_freq - 20))
1554 channel_before = c;
1555 if (c->center_freq == (channel->center_freq + 20))
1556 channel_after = c;
1557 }
1558
1559 /*
1560 * Please note that this assumes target bandwidth is 20 MHz,
1561 * if that ever changes we also need to change the below logic
1562 * to include that as well.
1563 */
Johannes Berg1a919312012-12-03 17:21:11 +01001564 if (!is_ht40_allowed(channel_before))
Luis R. Rodriguez689da1b2009-05-02 00:37:18 -04001565 channel->flags |= IEEE80211_CHAN_NO_HT40MINUS;
Luis R. Rodriguez038659e2009-05-02 00:37:17 -04001566 else
Luis R. Rodriguez689da1b2009-05-02 00:37:18 -04001567 channel->flags &= ~IEEE80211_CHAN_NO_HT40MINUS;
Luis R. Rodriguez038659e2009-05-02 00:37:17 -04001568
Johannes Berg1a919312012-12-03 17:21:11 +01001569 if (!is_ht40_allowed(channel_after))
Luis R. Rodriguez689da1b2009-05-02 00:37:18 -04001570 channel->flags |= IEEE80211_CHAN_NO_HT40PLUS;
Luis R. Rodriguez038659e2009-05-02 00:37:17 -04001571 else
Luis R. Rodriguez689da1b2009-05-02 00:37:18 -04001572 channel->flags &= ~IEEE80211_CHAN_NO_HT40PLUS;
Luis R. Rodriguez038659e2009-05-02 00:37:17 -04001573}
1574
1575static void reg_process_ht_flags_band(struct wiphy *wiphy,
Johannes Bergfdc9d7b2012-12-03 18:36:09 +01001576 struct ieee80211_supported_band *sband)
Luis R. Rodriguez038659e2009-05-02 00:37:17 -04001577{
1578 unsigned int i;
Luis R. Rodriguez038659e2009-05-02 00:37:17 -04001579
Johannes Bergfdc9d7b2012-12-03 18:36:09 +01001580 if (!sband)
1581 return;
Luis R. Rodriguez038659e2009-05-02 00:37:17 -04001582
1583 for (i = 0; i < sband->n_channels; i++)
Johannes Bergfdc9d7b2012-12-03 18:36:09 +01001584 reg_process_ht_flags_channel(wiphy, &sband->channels[i]);
Luis R. Rodriguez038659e2009-05-02 00:37:17 -04001585}
1586
1587static void reg_process_ht_flags(struct wiphy *wiphy)
1588{
1589 enum ieee80211_band band;
1590
1591 if (!wiphy)
1592 return;
1593
Johannes Bergfdc9d7b2012-12-03 18:36:09 +01001594 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
1595 reg_process_ht_flags_band(wiphy, wiphy->bands[band]);
Luis R. Rodriguez038659e2009-05-02 00:37:17 -04001596}
1597
Luis R. Rodriguez0e3802d2013-11-05 09:18:12 -08001598static void reg_call_notifier(struct wiphy *wiphy,
1599 struct regulatory_request *request)
1600{
1601 if (wiphy->reg_notifier)
1602 wiphy->reg_notifier(wiphy, request);
1603}
1604
Arik Nemtsovad932f02014-11-27 09:44:55 +02001605static bool reg_wdev_chan_valid(struct wiphy *wiphy, struct wireless_dev *wdev)
1606{
Arik Nemtsovad932f02014-11-27 09:44:55 +02001607 struct cfg80211_chan_def chandef;
1608 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
Arik Nemtsov20658702014-12-29 11:59:59 +02001609 enum nl80211_iftype iftype;
Arik Nemtsovad932f02014-11-27 09:44:55 +02001610
1611 wdev_lock(wdev);
Arik Nemtsov20658702014-12-29 11:59:59 +02001612 iftype = wdev->iftype;
Arik Nemtsovad932f02014-11-27 09:44:55 +02001613
Arik Nemtsov20658702014-12-29 11:59:59 +02001614 /* make sure the interface is active */
Arik Nemtsovad932f02014-11-27 09:44:55 +02001615 if (!wdev->netdev || !netif_running(wdev->netdev))
Arik Nemtsov20658702014-12-29 11:59:59 +02001616 goto wdev_inactive_unlock;
Arik Nemtsovad932f02014-11-27 09:44:55 +02001617
Arik Nemtsov20658702014-12-29 11:59:59 +02001618 switch (iftype) {
Arik Nemtsovad932f02014-11-27 09:44:55 +02001619 case NL80211_IFTYPE_AP:
1620 case NL80211_IFTYPE_P2P_GO:
1621 if (!wdev->beacon_interval)
Arik Nemtsov20658702014-12-29 11:59:59 +02001622 goto wdev_inactive_unlock;
1623 chandef = wdev->chandef;
Arik Nemtsovad932f02014-11-27 09:44:55 +02001624 break;
Arik Nemtsov185076d2014-12-03 18:08:17 +02001625 case NL80211_IFTYPE_ADHOC:
1626 if (!wdev->ssid_len)
Arik Nemtsov20658702014-12-29 11:59:59 +02001627 goto wdev_inactive_unlock;
1628 chandef = wdev->chandef;
Arik Nemtsov185076d2014-12-03 18:08:17 +02001629 break;
Arik Nemtsovad932f02014-11-27 09:44:55 +02001630 case NL80211_IFTYPE_STATION:
1631 case NL80211_IFTYPE_P2P_CLIENT:
Arik Nemtsovad932f02014-11-27 09:44:55 +02001632 if (!wdev->current_bss ||
1633 !wdev->current_bss->pub.channel)
Arik Nemtsov20658702014-12-29 11:59:59 +02001634 goto wdev_inactive_unlock;
Arik Nemtsovad932f02014-11-27 09:44:55 +02001635
Arik Nemtsov20658702014-12-29 11:59:59 +02001636 if (!rdev->ops->get_channel ||
1637 rdev_get_channel(rdev, wdev, &chandef))
1638 cfg80211_chandef_create(&chandef,
1639 wdev->current_bss->pub.channel,
1640 NL80211_CHAN_NO_HT);
Arik Nemtsovad932f02014-11-27 09:44:55 +02001641 break;
1642 case NL80211_IFTYPE_MONITOR:
1643 case NL80211_IFTYPE_AP_VLAN:
1644 case NL80211_IFTYPE_P2P_DEVICE:
1645 /* no enforcement required */
1646 break;
1647 default:
1648 /* others not implemented for now */
1649 WARN_ON(1);
1650 break;
1651 }
1652
Arik Nemtsovad932f02014-11-27 09:44:55 +02001653 wdev_unlock(wdev);
Arik Nemtsov20658702014-12-29 11:59:59 +02001654
1655 switch (iftype) {
1656 case NL80211_IFTYPE_AP:
1657 case NL80211_IFTYPE_P2P_GO:
1658 case NL80211_IFTYPE_ADHOC:
Arik Nemtsov923b3522015-07-08 15:41:44 +03001659 return cfg80211_reg_can_beacon_relax(wiphy, &chandef, iftype);
Arik Nemtsov20658702014-12-29 11:59:59 +02001660 case NL80211_IFTYPE_STATION:
1661 case NL80211_IFTYPE_P2P_CLIENT:
1662 return cfg80211_chandef_usable(wiphy, &chandef,
1663 IEEE80211_CHAN_DISABLED);
1664 default:
1665 break;
1666 }
1667
1668 return true;
1669
1670wdev_inactive_unlock:
1671 wdev_unlock(wdev);
1672 return true;
Arik Nemtsovad932f02014-11-27 09:44:55 +02001673}
1674
1675static void reg_leave_invalid_chans(struct wiphy *wiphy)
1676{
1677 struct wireless_dev *wdev;
1678 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
1679
1680 ASSERT_RTNL();
1681
1682 list_for_each_entry(wdev, &rdev->wdev_list, list)
1683 if (!reg_wdev_chan_valid(wiphy, wdev))
1684 cfg80211_leave(rdev, wdev);
1685}
1686
1687static void reg_check_chans_work(struct work_struct *work)
1688{
1689 struct cfg80211_registered_device *rdev;
1690
1691 REG_DBG_PRINT("Verifying active interfaces after reg change\n");
1692 rtnl_lock();
1693
1694 list_for_each_entry(rdev, &cfg80211_rdev_list, list)
1695 if (!(rdev->wiphy.regulatory_flags &
1696 REGULATORY_IGNORE_STALE_KICKOFF))
1697 reg_leave_invalid_chans(&rdev->wiphy);
1698
1699 rtnl_unlock();
1700}
1701
1702static void reg_check_channels(void)
1703{
1704 /*
1705 * Give usermode a chance to do something nicer (move to another
1706 * channel, orderly disconnection), before forcing a disconnection.
1707 */
1708 mod_delayed_work(system_power_efficient_wq,
1709 &reg_check_chans,
1710 msecs_to_jiffies(REG_ENFORCE_GRACE_MS));
1711}
1712
Sven Neumanneac03e32011-08-30 23:38:53 +02001713static void wiphy_update_regulatory(struct wiphy *wiphy,
1714 enum nl80211_reg_initiator initiator)
Johannes Berg8318d782008-01-24 19:38:38 +01001715{
1716 enum ieee80211_band band;
Johannes Bergc492db32012-12-06 16:29:25 +01001717 struct regulatory_request *lr = get_last_request();
Sven Neumanneac03e32011-08-30 23:38:53 +02001718
Luis R. Rodriguez0e3802d2013-11-05 09:18:12 -08001719 if (ignore_reg_update(wiphy, initiator)) {
1720 /*
1721 * Regulatory updates set by CORE are ignored for custom
1722 * regulatory cards. Let us notify the changes to the driver,
1723 * as some drivers used this to restore its orig_* reg domain.
1724 */
1725 if (initiator == NL80211_REGDOM_SET_BY_CORE &&
Luis R. Rodrigueza2f73b62013-11-11 22:15:29 +01001726 wiphy->regulatory_flags & REGULATORY_CUSTOM_REG)
Luis R. Rodriguez0e3802d2013-11-05 09:18:12 -08001727 reg_call_notifier(wiphy, lr);
Sven Neumanna203c2a2011-07-12 15:52:07 +02001728 return;
Luis R. Rodriguez0e3802d2013-11-05 09:18:12 -08001729 }
Sven Neumanna203c2a2011-07-12 15:52:07 +02001730
Johannes Bergc492db32012-12-06 16:29:25 +01001731 lr->dfs_region = get_cfg80211_regdom()->dfs_region;
Luis R. Rodriguezb68e6b32011-10-11 10:59:03 -07001732
Johannes Bergfdc9d7b2012-12-03 18:36:09 +01001733 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
1734 handle_band(wiphy, initiator, wiphy->bands[band]);
Sven Neumanna203c2a2011-07-12 15:52:07 +02001735
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05001736 reg_process_beacons(wiphy);
Luis R. Rodriguez038659e2009-05-02 00:37:17 -04001737 reg_process_ht_flags(wiphy);
Luis R. Rodriguez0e3802d2013-11-05 09:18:12 -08001738 reg_call_notifier(wiphy, lr);
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07001739}
1740
Sven Neumannd7549cb2011-08-30 23:38:54 +02001741static void update_all_wiphy_regulatory(enum nl80211_reg_initiator initiator)
1742{
1743 struct cfg80211_registered_device *rdev;
Rajkumar Manoharan4a389942011-12-08 23:59:26 +05301744 struct wiphy *wiphy;
Sven Neumannd7549cb2011-08-30 23:38:54 +02001745
Johannes Berg5fe231e2013-05-08 21:45:15 +02001746 ASSERT_RTNL();
Johannes Berg458f4f92012-12-06 15:47:38 +01001747
Rajkumar Manoharan4a389942011-12-08 23:59:26 +05301748 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
1749 wiphy = &rdev->wiphy;
1750 wiphy_update_regulatory(wiphy, initiator);
Rajkumar Manoharan4a389942011-12-08 23:59:26 +05301751 }
Arik Nemtsovad932f02014-11-27 09:44:55 +02001752
1753 reg_check_channels();
Sven Neumannd7549cb2011-08-30 23:38:54 +02001754}
1755
Luis R. Rodriguez1fa25e42009-01-22 15:05:44 -08001756static void handle_channel_custom(struct wiphy *wiphy,
Johannes Bergfdc9d7b2012-12-03 18:36:09 +01001757 struct ieee80211_channel *chan,
Luis R. Rodriguez1fa25e42009-01-22 15:05:44 -08001758 const struct ieee80211_regdomain *regd)
1759{
Luis R. Rodriguez038659e2009-05-02 00:37:17 -04001760 u32 bw_flags = 0;
Luis R. Rodriguez1fa25e42009-01-22 15:05:44 -08001761 const struct ieee80211_reg_rule *reg_rule = NULL;
1762 const struct ieee80211_power_rule *power_rule = NULL;
Luis R. Rodriguez038659e2009-05-02 00:37:17 -04001763 const struct ieee80211_freq_range *freq_range = NULL;
Janusz Dziedzic97524822014-01-30 09:52:20 +01001764 u32 max_bandwidth_khz;
Matthias May4edd5692015-07-17 15:28:39 +02001765 u32 bw;
Luis R. Rodriguez1fa25e42009-01-22 15:05:44 -08001766
Matthias May4edd5692015-07-17 15:28:39 +02001767 for (bw = MHZ_TO_KHZ(20); bw >= MHZ_TO_KHZ(5); bw = bw / 2) {
Michal Sojka49172872015-11-23 19:27:14 +01001768 reg_rule = freq_reg_info_regd(MHZ_TO_KHZ(chan->center_freq),
Matthias May4edd5692015-07-17 15:28:39 +02001769 regd, bw);
1770 if (!IS_ERR(reg_rule))
1771 break;
1772 }
Luis R. Rodriguezac46d482009-05-01 18:44:50 -04001773
Johannes Berg361c9c82012-12-06 15:57:14 +01001774 if (IS_ERR(reg_rule)) {
Johannes Bergfe7ef5e2012-12-04 15:07:34 +01001775 REG_DBG_PRINT("Disabling freq %d MHz as custom regd has no rule that fits it\n",
1776 chan->center_freq);
Arik Nemtsovdb8dfee2014-12-15 19:26:02 +02001777 if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) {
1778 chan->flags |= IEEE80211_CHAN_DISABLED;
1779 } else {
1780 chan->orig_flags |= IEEE80211_CHAN_DISABLED;
1781 chan->flags = chan->orig_flags;
1782 }
Luis R. Rodriguez1fa25e42009-01-22 15:05:44 -08001783 return;
1784 }
1785
Janusz Dziedzicb0dfd2e2014-02-20 13:52:16 +01001786 chan_reg_rule_print_dbg(regd, chan, reg_rule);
Luis R. Rodrigueze702d3c2010-10-21 19:17:04 +05301787
Luis R. Rodriguez1fa25e42009-01-22 15:05:44 -08001788 power_rule = &reg_rule->power_rule;
Luis R. Rodriguez038659e2009-05-02 00:37:17 -04001789 freq_range = &reg_rule->freq_range;
Luis R. Rodriguez1fa25e42009-01-22 15:05:44 -08001790
Janusz Dziedzic97524822014-01-30 09:52:20 +01001791 max_bandwidth_khz = freq_range->max_bandwidth_khz;
1792 /* Check if auto calculation requested */
Janusz Dziedzicb0dfd2e2014-02-20 13:52:16 +01001793 if (reg_rule->flags & NL80211_RRF_AUTO_BW)
Janusz Dziedzic97524822014-01-30 09:52:20 +01001794 max_bandwidth_khz = reg_get_max_bandwidth(regd, reg_rule);
1795
Matthias May4edd5692015-07-17 15:28:39 +02001796 /* If we get a reg_rule we can assume that at least 5Mhz fit */
1797 if (!reg_does_bw_fit(freq_range, MHZ_TO_KHZ(chan->center_freq),
1798 MHZ_TO_KHZ(10)))
1799 bw_flags |= IEEE80211_CHAN_NO_10MHZ;
1800 if (!reg_does_bw_fit(freq_range, MHZ_TO_KHZ(chan->center_freq),
1801 MHZ_TO_KHZ(20)))
1802 bw_flags |= IEEE80211_CHAN_NO_20MHZ;
1803
1804 if (max_bandwidth_khz < MHZ_TO_KHZ(10))
1805 bw_flags |= IEEE80211_CHAN_NO_10MHZ;
1806 if (max_bandwidth_khz < MHZ_TO_KHZ(20))
1807 bw_flags |= IEEE80211_CHAN_NO_20MHZ;
Janusz Dziedzic97524822014-01-30 09:52:20 +01001808 if (max_bandwidth_khz < MHZ_TO_KHZ(40))
Matthias May4edd5692015-07-17 15:28:39 +02001809 bw_flags |= IEEE80211_CHAN_NO_HT40;
Janusz Dziedzic97524822014-01-30 09:52:20 +01001810 if (max_bandwidth_khz < MHZ_TO_KHZ(80))
Johannes Bergc7a6ee22012-12-12 17:50:39 +01001811 bw_flags |= IEEE80211_CHAN_NO_80MHZ;
Janusz Dziedzic97524822014-01-30 09:52:20 +01001812 if (max_bandwidth_khz < MHZ_TO_KHZ(160))
Johannes Bergc7a6ee22012-12-12 17:50:39 +01001813 bw_flags |= IEEE80211_CHAN_NO_160MHZ;
Luis R. Rodriguez038659e2009-05-02 00:37:17 -04001814
Arik Nemtsov2e18b382014-11-16 16:37:46 +02001815 chan->dfs_state_entered = jiffies;
Arik Nemtsovc7ab5082014-11-16 16:37:47 +02001816 chan->dfs_state = NL80211_DFS_USABLE;
1817
1818 chan->beacon_found = false;
Arik Nemtsovdb8dfee2014-12-15 19:26:02 +02001819
1820 if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED)
1821 chan->flags = chan->orig_flags | bw_flags |
1822 map_regdom_flags(reg_rule->flags);
1823 else
1824 chan->flags |= map_regdom_flags(reg_rule->flags) | bw_flags;
1825
Luis R. Rodriguez1fa25e42009-01-22 15:05:44 -08001826 chan->max_antenna_gain = (int) MBI_TO_DBI(power_rule->max_antenna_gain);
Felix Fietkau279f0f52012-10-17 13:56:20 +02001827 chan->max_reg_power = chan->max_power =
1828 (int) MBM_TO_DBM(power_rule->max_eirp);
Arik Nemtsov2e18b382014-11-16 16:37:46 +02001829
1830 if (chan->flags & IEEE80211_CHAN_RADAR) {
1831 if (reg_rule->dfs_cac_ms)
1832 chan->dfs_cac_ms = reg_rule->dfs_cac_ms;
1833 else
1834 chan->dfs_cac_ms = IEEE80211_DFS_MIN_CAC_TIME_MS;
1835 }
1836
1837 chan->max_power = chan->max_reg_power;
Luis R. Rodriguez1fa25e42009-01-22 15:05:44 -08001838}
1839
Johannes Bergfdc9d7b2012-12-03 18:36:09 +01001840static void handle_band_custom(struct wiphy *wiphy,
1841 struct ieee80211_supported_band *sband,
Luis R. Rodriguez1fa25e42009-01-22 15:05:44 -08001842 const struct ieee80211_regdomain *regd)
1843{
1844 unsigned int i;
Luis R. Rodriguez1fa25e42009-01-22 15:05:44 -08001845
Johannes Bergfdc9d7b2012-12-03 18:36:09 +01001846 if (!sband)
1847 return;
Luis R. Rodriguez1fa25e42009-01-22 15:05:44 -08001848
1849 for (i = 0; i < sband->n_channels; i++)
Johannes Bergfdc9d7b2012-12-03 18:36:09 +01001850 handle_channel_custom(wiphy, &sband->channels[i], regd);
Luis R. Rodriguez1fa25e42009-01-22 15:05:44 -08001851}
1852
1853/* Used by drivers prior to wiphy registration */
1854void wiphy_apply_custom_regulatory(struct wiphy *wiphy,
1855 const struct ieee80211_regdomain *regd)
1856{
1857 enum ieee80211_band band;
Luis R. Rodriguezbbcf3f02009-05-19 17:49:47 -04001858 unsigned int bands_set = 0;
Luis R. Rodriguezac46d482009-05-01 18:44:50 -04001859
Luis R. Rodrigueza2f73b62013-11-11 22:15:29 +01001860 WARN(!(wiphy->regulatory_flags & REGULATORY_CUSTOM_REG),
1861 "wiphy should have REGULATORY_CUSTOM_REG\n");
1862 wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG;
Luis R. Rodriguez222ea582013-11-05 09:18:00 -08001863
Luis R. Rodriguez1fa25e42009-01-22 15:05:44 -08001864 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
Luis R. Rodriguezbbcf3f02009-05-19 17:49:47 -04001865 if (!wiphy->bands[band])
1866 continue;
Johannes Bergfdc9d7b2012-12-03 18:36:09 +01001867 handle_band_custom(wiphy, wiphy->bands[band], regd);
Luis R. Rodriguezbbcf3f02009-05-19 17:49:47 -04001868 bands_set++;
Luis R. Rodriguez1fa25e42009-01-22 15:05:44 -08001869 }
Luis R. Rodriguezbbcf3f02009-05-19 17:49:47 -04001870
1871 /*
1872 * no point in calling this if it won't have any effect
Johannes Berg1a919312012-12-03 17:21:11 +01001873 * on your device's supported bands.
Luis R. Rodriguezbbcf3f02009-05-19 17:49:47 -04001874 */
1875 WARN_ON(!bands_set);
Luis R. Rodriguez1fa25e42009-01-22 15:05:44 -08001876}
1877EXPORT_SYMBOL(wiphy_apply_custom_regulatory);
1878
Luis R. Rodriguezb2e253c2010-11-17 21:46:09 -08001879static void reg_set_request_processed(void)
1880{
1881 bool need_more_processing = false;
Johannes Bergc492db32012-12-06 16:29:25 +01001882 struct regulatory_request *lr = get_last_request();
Luis R. Rodriguezb2e253c2010-11-17 21:46:09 -08001883
Johannes Bergc492db32012-12-06 16:29:25 +01001884 lr->processed = true;
Luis R. Rodriguezb2e253c2010-11-17 21:46:09 -08001885
1886 spin_lock(&reg_requests_lock);
1887 if (!list_empty(&reg_requests_list))
1888 need_more_processing = true;
1889 spin_unlock(&reg_requests_lock);
1890
Johannes Bergb6863032015-10-15 09:25:18 +02001891 cancel_crda_timeout();
Luis R. Rodrigueza90c7a32011-04-05 10:49:04 -07001892
Luis R. Rodriguezb2e253c2010-11-17 21:46:09 -08001893 if (need_more_processing)
1894 schedule_work(&reg_work);
1895}
1896
Luis R. Rodriguezd1c96a92009-02-21 00:24:13 -05001897/**
Luis R. Rodriguezb3eb7f32013-11-05 09:18:03 -08001898 * reg_process_hint_core - process core regulatory requests
1899 * @pending_request: a pending core regulatory request
1900 *
1901 * The wireless subsystem can use this function to process
1902 * a regulatory request issued by the regulatory core.
Luis R. Rodriguezb3eb7f32013-11-05 09:18:03 -08001903 */
Johannes Bergd34265a2015-10-15 13:05:55 +02001904static enum reg_request_treatment
1905reg_process_hint_core(struct regulatory_request *core_request)
Luis R. Rodriguezb3eb7f32013-11-05 09:18:03 -08001906{
Johannes Bergcecbb062015-10-15 08:47:34 +02001907 if (reg_query_database(core_request)) {
Johannes Berg25b20db2015-10-15 12:05:05 +02001908 core_request->intersect = false;
1909 core_request->processed = false;
1910 reg_update_last_request(core_request);
Johannes Bergd34265a2015-10-15 13:05:55 +02001911 return REG_REQ_OK;
Johannes Berg25b20db2015-10-15 12:05:05 +02001912 }
Johannes Bergd34265a2015-10-15 13:05:55 +02001913
1914 return REG_REQ_IGNORE;
Luis R. Rodriguezb3eb7f32013-11-05 09:18:03 -08001915}
1916
Luis R. Rodriguez0d97a612013-11-05 09:18:04 -08001917static enum reg_request_treatment
1918__reg_process_hint_user(struct regulatory_request *user_request)
1919{
1920 struct regulatory_request *lr = get_last_request();
1921
1922 if (reg_request_cell_base(user_request))
1923 return reg_ignore_cell_hint(user_request);
1924
1925 if (reg_request_cell_base(lr))
1926 return REG_REQ_IGNORE;
1927
1928 if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE)
1929 return REG_REQ_INTERSECT;
1930 /*
1931 * If the user knows better the user should set the regdom
1932 * to their country before the IE is picked up
1933 */
1934 if (lr->initiator == NL80211_REGDOM_SET_BY_USER &&
1935 lr->intersect)
1936 return REG_REQ_IGNORE;
1937 /*
1938 * Process user requests only after previous user/driver/core
1939 * requests have been processed
1940 */
1941 if ((lr->initiator == NL80211_REGDOM_SET_BY_CORE ||
1942 lr->initiator == NL80211_REGDOM_SET_BY_DRIVER ||
1943 lr->initiator == NL80211_REGDOM_SET_BY_USER) &&
1944 regdom_changes(lr->alpha2))
1945 return REG_REQ_IGNORE;
1946
1947 if (!regdom_changes(user_request->alpha2))
1948 return REG_REQ_ALREADY_SET;
1949
1950 return REG_REQ_OK;
1951}
1952
1953/**
1954 * reg_process_hint_user - process user regulatory requests
1955 * @user_request: a pending user regulatory request
1956 *
1957 * The wireless subsystem can use this function to process
1958 * a regulatory request initiated by userspace.
Luis R. Rodriguez0d97a612013-11-05 09:18:04 -08001959 */
Johannes Bergd34265a2015-10-15 13:05:55 +02001960static enum reg_request_treatment
1961reg_process_hint_user(struct regulatory_request *user_request)
Luis R. Rodriguez0d97a612013-11-05 09:18:04 -08001962{
1963 enum reg_request_treatment treatment;
Luis R. Rodriguez0d97a612013-11-05 09:18:04 -08001964
1965 treatment = __reg_process_hint_user(user_request);
1966 if (treatment == REG_REQ_IGNORE ||
Johannes Bergd34265a2015-10-15 13:05:55 +02001967 treatment == REG_REQ_ALREADY_SET)
1968 return REG_REQ_IGNORE;
Luis R. Rodriguez0d97a612013-11-05 09:18:04 -08001969
Luis R. Rodriguez0d97a612013-11-05 09:18:04 -08001970 user_request->intersect = treatment == REG_REQ_INTERSECT;
1971 user_request->processed = false;
Luis R. Rodriguez5ad6ef52013-11-05 09:18:08 -08001972
Johannes Bergcecbb062015-10-15 08:47:34 +02001973 if (reg_query_database(user_request)) {
Johannes Berg25b20db2015-10-15 12:05:05 +02001974 reg_update_last_request(user_request);
1975 user_alpha2[0] = user_request->alpha2[0];
1976 user_alpha2[1] = user_request->alpha2[1];
Johannes Bergd34265a2015-10-15 13:05:55 +02001977 return REG_REQ_OK;
Johannes Berg25b20db2015-10-15 12:05:05 +02001978 }
Johannes Bergd34265a2015-10-15 13:05:55 +02001979
1980 return REG_REQ_IGNORE;
Luis R. Rodriguez0d97a612013-11-05 09:18:04 -08001981}
1982
Luis R. Rodriguez21636c72013-11-05 09:18:05 -08001983static enum reg_request_treatment
1984__reg_process_hint_driver(struct regulatory_request *driver_request)
1985{
1986 struct regulatory_request *lr = get_last_request();
1987
1988 if (lr->initiator == NL80211_REGDOM_SET_BY_CORE) {
1989 if (regdom_changes(driver_request->alpha2))
1990 return REG_REQ_OK;
1991 return REG_REQ_ALREADY_SET;
1992 }
1993
1994 /*
1995 * This would happen if you unplug and plug your card
1996 * back in or if you add a new device for which the previously
1997 * loaded card also agrees on the regulatory domain.
1998 */
1999 if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER &&
2000 !regdom_changes(driver_request->alpha2))
2001 return REG_REQ_ALREADY_SET;
2002
2003 return REG_REQ_INTERSECT;
2004}
2005
2006/**
2007 * reg_process_hint_driver - process driver regulatory requests
2008 * @driver_request: a pending driver regulatory request
2009 *
2010 * The wireless subsystem can use this function to process
2011 * a regulatory request issued by an 802.11 driver.
2012 *
2013 * Returns one of the different reg request treatment values.
2014 */
2015static enum reg_request_treatment
2016reg_process_hint_driver(struct wiphy *wiphy,
2017 struct regulatory_request *driver_request)
2018{
Arik Nemtsov34f05f52014-12-04 12:22:16 +02002019 const struct ieee80211_regdomain *regd, *tmp;
Luis R. Rodriguez21636c72013-11-05 09:18:05 -08002020 enum reg_request_treatment treatment;
Luis R. Rodriguez21636c72013-11-05 09:18:05 -08002021
2022 treatment = __reg_process_hint_driver(driver_request);
2023
2024 switch (treatment) {
2025 case REG_REQ_OK:
2026 break;
2027 case REG_REQ_IGNORE:
Johannes Bergd34265a2015-10-15 13:05:55 +02002028 return REG_REQ_IGNORE;
Luis R. Rodriguez21636c72013-11-05 09:18:05 -08002029 case REG_REQ_INTERSECT:
Luis R. Rodriguez21636c72013-11-05 09:18:05 -08002030 case REG_REQ_ALREADY_SET:
2031 regd = reg_copy_regd(get_cfg80211_regdom());
Johannes Bergd34265a2015-10-15 13:05:55 +02002032 if (IS_ERR(regd))
2033 return REG_REQ_IGNORE;
Arik Nemtsov34f05f52014-12-04 12:22:16 +02002034
2035 tmp = get_wiphy_regdom(wiphy);
Luis R. Rodriguez21636c72013-11-05 09:18:05 -08002036 rcu_assign_pointer(wiphy->regd, regd);
Arik Nemtsov34f05f52014-12-04 12:22:16 +02002037 rcu_free_regdom(tmp);
Luis R. Rodriguez21636c72013-11-05 09:18:05 -08002038 }
2039
Luis R. Rodriguez21636c72013-11-05 09:18:05 -08002040
2041 driver_request->intersect = treatment == REG_REQ_INTERSECT;
2042 driver_request->processed = false;
Luis R. Rodriguez5ad6ef52013-11-05 09:18:08 -08002043
Luis R. Rodriguez21636c72013-11-05 09:18:05 -08002044 /*
2045 * Since CRDA will not be called in this case as we already
2046 * have applied the requested regulatory domain before we just
2047 * inform userspace we have processed the request
2048 */
2049 if (treatment == REG_REQ_ALREADY_SET) {
2050 nl80211_send_reg_change_event(driver_request);
Johannes Berg25b20db2015-10-15 12:05:05 +02002051 reg_update_last_request(driver_request);
Luis R. Rodriguez21636c72013-11-05 09:18:05 -08002052 reg_set_request_processed();
Johannes Berg480908a2015-10-15 12:58:58 +02002053 return REG_REQ_ALREADY_SET;
Luis R. Rodriguez21636c72013-11-05 09:18:05 -08002054 }
2055
Johannes Bergd34265a2015-10-15 13:05:55 +02002056 if (reg_query_database(driver_request)) {
Johannes Berg25b20db2015-10-15 12:05:05 +02002057 reg_update_last_request(driver_request);
Johannes Bergd34265a2015-10-15 13:05:55 +02002058 return REG_REQ_OK;
2059 }
Johannes Berg25b20db2015-10-15 12:05:05 +02002060
Johannes Bergd34265a2015-10-15 13:05:55 +02002061 return REG_REQ_IGNORE;
Luis R. Rodriguez21636c72013-11-05 09:18:05 -08002062}
2063
Luis R. Rodriguezb23e7a92013-11-05 09:18:06 -08002064static enum reg_request_treatment
2065__reg_process_hint_country_ie(struct wiphy *wiphy,
2066 struct regulatory_request *country_ie_request)
2067{
2068 struct wiphy *last_wiphy = NULL;
2069 struct regulatory_request *lr = get_last_request();
2070
2071 if (reg_request_cell_base(lr)) {
2072 /* Trust a Cell base station over the AP's country IE */
2073 if (regdom_changes(country_ie_request->alpha2))
2074 return REG_REQ_IGNORE;
2075 return REG_REQ_ALREADY_SET;
Luis R. Rodriguez2a901462013-11-11 22:15:31 +01002076 } else {
2077 if (wiphy->regulatory_flags & REGULATORY_COUNTRY_IE_IGNORE)
2078 return REG_REQ_IGNORE;
Luis R. Rodriguezb23e7a92013-11-05 09:18:06 -08002079 }
2080
Luis R. Rodriguezb23e7a92013-11-05 09:18:06 -08002081 if (unlikely(!is_an_alpha2(country_ie_request->alpha2)))
2082 return -EINVAL;
Luis R. Rodriguez2f1c6c52013-11-05 09:18:07 -08002083
2084 if (lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE)
2085 return REG_REQ_OK;
2086
2087 last_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx);
2088
2089 if (last_wiphy != wiphy) {
Luis R. Rodriguezb23e7a92013-11-05 09:18:06 -08002090 /*
Luis R. Rodriguez2f1c6c52013-11-05 09:18:07 -08002091 * Two cards with two APs claiming different
2092 * Country IE alpha2s. We could
2093 * intersect them, but that seems unlikely
2094 * to be correct. Reject second one for now.
Luis R. Rodriguezb23e7a92013-11-05 09:18:06 -08002095 */
Luis R. Rodriguez2f1c6c52013-11-05 09:18:07 -08002096 if (regdom_changes(country_ie_request->alpha2))
2097 return REG_REQ_IGNORE;
Luis R. Rodriguezb23e7a92013-11-05 09:18:06 -08002098 return REG_REQ_ALREADY_SET;
2099 }
Emmanuel Grumbach70dcec52014-12-02 09:53:25 +02002100
2101 if (regdom_changes(country_ie_request->alpha2))
Luis R. Rodriguez2f1c6c52013-11-05 09:18:07 -08002102 return REG_REQ_OK;
2103 return REG_REQ_ALREADY_SET;
Luis R. Rodriguezb23e7a92013-11-05 09:18:06 -08002104}
2105
Luis R. Rodriguezb3eb7f32013-11-05 09:18:03 -08002106/**
Luis R. Rodriguezb23e7a92013-11-05 09:18:06 -08002107 * reg_process_hint_country_ie - process regulatory requests from country IEs
2108 * @country_ie_request: a regulatory request from a country IE
Luis R. Rodriguezd1c96a92009-02-21 00:24:13 -05002109 *
Luis R. Rodriguezb23e7a92013-11-05 09:18:06 -08002110 * The wireless subsystem can use this function to process
2111 * a regulatory request issued by a country Information Element.
Luis R. Rodriguezd1c96a92009-02-21 00:24:13 -05002112 *
Johannes Berg2f922122012-12-03 17:54:55 +01002113 * Returns one of the different reg request treatment values.
Luis R. Rodriguezd1c96a92009-02-21 00:24:13 -05002114 */
Johannes Berg2f922122012-12-03 17:54:55 +01002115static enum reg_request_treatment
Luis R. Rodriguezb23e7a92013-11-05 09:18:06 -08002116reg_process_hint_country_ie(struct wiphy *wiphy,
2117 struct regulatory_request *country_ie_request)
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002118{
Johannes Berg2f922122012-12-03 17:54:55 +01002119 enum reg_request_treatment treatment;
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002120
Luis R. Rodriguezb23e7a92013-11-05 09:18:06 -08002121 treatment = __reg_process_hint_country_ie(wiphy, country_ie_request);
Luis R. Rodriguez761cf7e2009-02-21 00:04:25 -05002122
Johannes Berg2f922122012-12-03 17:54:55 +01002123 switch (treatment) {
Johannes Berg2f922122012-12-03 17:54:55 +01002124 case REG_REQ_OK:
2125 break;
Luis R. Rodriguezb23e7a92013-11-05 09:18:06 -08002126 case REG_REQ_IGNORE:
Johannes Bergd34265a2015-10-15 13:05:55 +02002127 return REG_REQ_IGNORE;
Luis R. Rodriguezb23e7a92013-11-05 09:18:06 -08002128 case REG_REQ_ALREADY_SET:
Arik Nemtsovc8883932014-04-21 20:39:34 -07002129 reg_free_request(country_ie_request);
Johannes Berg480908a2015-10-15 12:58:58 +02002130 return REG_REQ_ALREADY_SET;
Luis R. Rodriguezb23e7a92013-11-05 09:18:06 -08002131 case REG_REQ_INTERSECT:
Luis R. Rodriguezb23e7a92013-11-05 09:18:06 -08002132 /*
2133 * This doesn't happen yet, not sure we
2134 * ever want to support it for this case.
2135 */
2136 WARN_ONCE(1, "Unexpected intersection for country IEs");
Johannes Bergd34265a2015-10-15 13:05:55 +02002137 return REG_REQ_IGNORE;
Luis R. Rodriguez3e0c3ff2009-01-07 17:43:34 -08002138 }
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002139
Luis R. Rodriguezb23e7a92013-11-05 09:18:06 -08002140 country_ie_request->intersect = false;
2141 country_ie_request->processed = false;
Luis R. Rodriguez5ad6ef52013-11-05 09:18:08 -08002142
Johannes Bergd34265a2015-10-15 13:05:55 +02002143 if (reg_query_database(country_ie_request)) {
Johannes Berg25b20db2015-10-15 12:05:05 +02002144 reg_update_last_request(country_ie_request);
Johannes Bergd34265a2015-10-15 13:05:55 +02002145 return REG_REQ_OK;
2146 }
Luis R. Rodriguezd951c1d2009-02-21 00:24:15 -05002147
Johannes Bergd34265a2015-10-15 13:05:55 +02002148 return REG_REQ_IGNORE;
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002149}
2150
Luis R. Rodriguez30a548c2009-05-02 01:17:27 -04002151/* This processes *all* regulatory hints */
Luis R. Rodriguez1daa37c2013-11-05 09:18:02 -08002152static void reg_process_hint(struct regulatory_request *reg_request)
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002153{
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002154 struct wiphy *wiphy = NULL;
Luis R. Rodriguezb3eb7f32013-11-05 09:18:03 -08002155 enum reg_request_treatment treatment;
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002156
Johannes Bergf4173762012-12-03 18:23:37 +01002157 if (reg_request->wiphy_idx != WIPHY_IDX_INVALID)
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002158 wiphy = wiphy_idx_to_wiphy(reg_request->wiphy_idx);
2159
Luis R. Rodriguezb3eb7f32013-11-05 09:18:03 -08002160 switch (reg_request->initiator) {
2161 case NL80211_REGDOM_SET_BY_CORE:
Johannes Bergd34265a2015-10-15 13:05:55 +02002162 treatment = reg_process_hint_core(reg_request);
2163 break;
Luis R. Rodriguezb3eb7f32013-11-05 09:18:03 -08002164 case NL80211_REGDOM_SET_BY_USER:
Johannes Bergd34265a2015-10-15 13:05:55 +02002165 treatment = reg_process_hint_user(reg_request);
2166 break;
Luis R. Rodriguezb3eb7f32013-11-05 09:18:03 -08002167 case NL80211_REGDOM_SET_BY_DRIVER:
Ilan Peer772f0382014-01-14 15:17:23 +02002168 if (!wiphy)
2169 goto out_free;
Luis R. Rodriguez21636c72013-11-05 09:18:05 -08002170 treatment = reg_process_hint_driver(wiphy, reg_request);
2171 break;
Luis R. Rodriguezb3eb7f32013-11-05 09:18:03 -08002172 case NL80211_REGDOM_SET_BY_COUNTRY_IE:
Ilan Peer772f0382014-01-14 15:17:23 +02002173 if (!wiphy)
2174 goto out_free;
Luis R. Rodriguezb23e7a92013-11-05 09:18:06 -08002175 treatment = reg_process_hint_country_ie(wiphy, reg_request);
Luis R. Rodriguezb3eb7f32013-11-05 09:18:03 -08002176 break;
2177 default:
2178 WARN(1, "invalid initiator %d\n", reg_request->initiator);
Ilan Peer772f0382014-01-14 15:17:23 +02002179 goto out_free;
Luis R. Rodriguezb3eb7f32013-11-05 09:18:03 -08002180 }
2181
Johannes Bergd34265a2015-10-15 13:05:55 +02002182 if (treatment == REG_REQ_IGNORE)
2183 goto out_free;
2184
Johannes Berg480908a2015-10-15 12:58:58 +02002185 WARN(treatment != REG_REQ_OK && treatment != REG_REQ_ALREADY_SET,
2186 "unexpected treatment value %d\n", treatment);
2187
John Linville841b3512015-06-24 11:42:25 -04002188 /* This is required so that the orig_* parameters are saved.
2189 * NOTE: treatment must be set for any case that reaches here!
2190 */
Luis R. Rodriguezb23e7a92013-11-05 09:18:06 -08002191 if (treatment == REG_REQ_ALREADY_SET && wiphy &&
Arik Nemtsovad932f02014-11-27 09:44:55 +02002192 wiphy->regulatory_flags & REGULATORY_STRICT_REG) {
Luis R. Rodriguezb23e7a92013-11-05 09:18:06 -08002193 wiphy_update_regulatory(wiphy, reg_request->initiator);
Arik Nemtsovad932f02014-11-27 09:44:55 +02002194 reg_check_channels();
2195 }
Ilan Peer772f0382014-01-14 15:17:23 +02002196
2197 return;
2198
2199out_free:
Arik Nemtsovc8883932014-04-21 20:39:34 -07002200 reg_free_request(reg_request);
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002201}
2202
Arik Nemtsovef51fb12015-01-07 16:47:20 +02002203static bool reg_only_self_managed_wiphys(void)
2204{
2205 struct cfg80211_registered_device *rdev;
2206 struct wiphy *wiphy;
2207 bool self_managed_found = false;
2208
2209 ASSERT_RTNL();
2210
2211 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
2212 wiphy = &rdev->wiphy;
2213 if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED)
2214 self_managed_found = true;
2215 else
2216 return false;
2217 }
2218
2219 /* make sure at least one self-managed wiphy exists */
2220 return self_managed_found;
2221}
2222
Luis R. Rodriguezb2e253c2010-11-17 21:46:09 -08002223/*
2224 * Processes regulatory hints, this is all the NL80211_REGDOM_SET_BY_*
2225 * Regulatory hints come on a first come first serve basis and we
2226 * must process each one atomically.
2227 */
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002228static void reg_process_pending_hints(void)
Luis R. Rodriguezb0e28802010-11-17 21:46:08 -08002229{
Johannes Bergc492db32012-12-06 16:29:25 +01002230 struct regulatory_request *reg_request, *lr;
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002231
Johannes Bergc492db32012-12-06 16:29:25 +01002232 lr = get_last_request();
Luis R. Rodriguezb0e28802010-11-17 21:46:08 -08002233
Luis R. Rodriguezb2e253c2010-11-17 21:46:09 -08002234 /* When last_request->processed becomes true this will be rescheduled */
Johannes Bergc492db32012-12-06 16:29:25 +01002235 if (lr && !lr->processed) {
Luis R. Rodriguez96cce122014-04-21 20:39:35 -07002236 reg_process_hint(lr);
Johannes Berg5fe231e2013-05-08 21:45:15 +02002237 return;
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002238 }
Luis R. Rodriguezb2e253c2010-11-17 21:46:09 -08002239
2240 spin_lock(&reg_requests_lock);
2241
2242 if (list_empty(&reg_requests_list)) {
2243 spin_unlock(&reg_requests_lock);
Johannes Berg5fe231e2013-05-08 21:45:15 +02002244 return;
Luis R. Rodriguezb2e253c2010-11-17 21:46:09 -08002245 }
2246
2247 reg_request = list_first_entry(&reg_requests_list,
2248 struct regulatory_request,
2249 list);
2250 list_del_init(&reg_request->list);
2251
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002252 spin_unlock(&reg_requests_lock);
Luis R. Rodriguezb0e28802010-11-17 21:46:08 -08002253
Arik Nemtsovef51fb12015-01-07 16:47:20 +02002254 if (reg_only_self_managed_wiphys()) {
2255 reg_free_request(reg_request);
2256 return;
2257 }
2258
Luis R. Rodriguez1daa37c2013-11-05 09:18:02 -08002259 reg_process_hint(reg_request);
Ben2e54a682015-03-12 09:37:34 -04002260
2261 lr = get_last_request();
2262
2263 spin_lock(&reg_requests_lock);
2264 if (!list_empty(&reg_requests_list) && lr && lr->processed)
2265 schedule_work(&reg_work);
2266 spin_unlock(&reg_requests_lock);
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002267}
2268
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05002269/* Processes beacon hints -- this has nothing to do with country IEs */
2270static void reg_process_pending_beacon_hints(void)
2271{
Johannes Berg79c97e92009-07-07 03:56:12 +02002272 struct cfg80211_registered_device *rdev;
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05002273 struct reg_beacon *pending_beacon, *tmp;
2274
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05002275 /* This goes through the _pending_ beacon list */
2276 spin_lock_bh(&reg_pending_beacons_lock);
2277
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05002278 list_for_each_entry_safe(pending_beacon, tmp,
2279 &reg_pending_beacons, list) {
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05002280 list_del_init(&pending_beacon->list);
2281
2282 /* Applies the beacon hint to current wiphys */
Johannes Berg79c97e92009-07-07 03:56:12 +02002283 list_for_each_entry(rdev, &cfg80211_rdev_list, list)
2284 wiphy_update_new_beacon(&rdev->wiphy, pending_beacon);
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05002285
2286 /* Remembers the beacon hint for new wiphys or reg changes */
2287 list_add_tail(&pending_beacon->list, &reg_beacon_list);
2288 }
2289
2290 spin_unlock_bh(&reg_pending_beacons_lock);
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05002291}
2292
Jonathan Doronb0d7aa52014-12-15 19:26:00 +02002293static void reg_process_self_managed_hints(void)
2294{
2295 struct cfg80211_registered_device *rdev;
2296 struct wiphy *wiphy;
2297 const struct ieee80211_regdomain *tmp;
2298 const struct ieee80211_regdomain *regd;
2299 enum ieee80211_band band;
2300 struct regulatory_request request = {};
2301
2302 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
2303 wiphy = &rdev->wiphy;
2304
2305 spin_lock(&reg_requests_lock);
2306 regd = rdev->requested_regd;
2307 rdev->requested_regd = NULL;
2308 spin_unlock(&reg_requests_lock);
2309
2310 if (regd == NULL)
2311 continue;
2312
2313 tmp = get_wiphy_regdom(wiphy);
2314 rcu_assign_pointer(wiphy->regd, regd);
2315 rcu_free_regdom(tmp);
2316
2317 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
2318 handle_band_custom(wiphy, wiphy->bands[band], regd);
2319
2320 reg_process_ht_flags(wiphy);
2321
2322 request.wiphy_idx = get_wiphy_idx(wiphy);
2323 request.alpha2[0] = regd->alpha2[0];
2324 request.alpha2[1] = regd->alpha2[1];
2325 request.initiator = NL80211_REGDOM_SET_BY_DRIVER;
2326
2327 nl80211_send_wiphy_reg_change_event(&request);
2328 }
2329
2330 reg_check_channels();
2331}
2332
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002333static void reg_todo(struct work_struct *work)
2334{
Johannes Berg5fe231e2013-05-08 21:45:15 +02002335 rtnl_lock();
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002336 reg_process_pending_hints();
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05002337 reg_process_pending_beacon_hints();
Jonathan Doronb0d7aa52014-12-15 19:26:00 +02002338 reg_process_self_managed_hints();
Johannes Berg5fe231e2013-05-08 21:45:15 +02002339 rtnl_unlock();
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002340}
2341
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002342static void queue_regulatory_request(struct regulatory_request *request)
2343{
Johannes Bergd4f2c882012-12-03 18:59:58 +01002344 request->alpha2[0] = toupper(request->alpha2[0]);
2345 request->alpha2[1] = toupper(request->alpha2[1]);
John W. Linvillec61029c2010-08-05 14:26:24 -04002346
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002347 spin_lock(&reg_requests_lock);
2348 list_add_tail(&request->list, &reg_requests_list);
2349 spin_unlock(&reg_requests_lock);
2350
2351 schedule_work(&reg_work);
2352}
2353
Luis R. Rodriguez09d989d2010-01-29 19:58:57 -05002354/*
2355 * Core regulatory hint -- happens during cfg80211_init()
2356 * and when we restore regulatory settings.
2357 */
Luis R. Rodriguezba25c142009-02-21 00:04:23 -05002358static int regulatory_hint_core(const char *alpha2)
2359{
2360 struct regulatory_request *request;
2361
Johannes Berg1a919312012-12-03 17:21:11 +01002362 request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL);
Luis R. Rodriguezba25c142009-02-21 00:04:23 -05002363 if (!request)
2364 return -ENOMEM;
2365
2366 request->alpha2[0] = alpha2[0];
2367 request->alpha2[1] = alpha2[1];
Luis R. Rodriguez7db90f42009-03-09 22:07:41 -04002368 request->initiator = NL80211_REGDOM_SET_BY_CORE;
Luis R. Rodriguezba25c142009-02-21 00:04:23 -05002369
Luis R. Rodriguez31e99722010-11-17 21:46:06 -08002370 queue_regulatory_request(request);
Luis R. Rodriguez5078b2e2009-05-13 17:04:42 -04002371
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002372 return 0;
Luis R. Rodriguezba25c142009-02-21 00:04:23 -05002373}
2374
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002375/* User hints */
Luis R. Rodriguez57b5ce02012-07-12 11:49:18 -07002376int regulatory_hint_user(const char *alpha2,
2377 enum nl80211_user_reg_hint_type user_reg_hint_type)
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002378{
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002379 struct regulatory_request *request;
2380
Johannes Bergfdc9d7b2012-12-03 18:36:09 +01002381 if (WARN_ON(!alpha2))
2382 return -EINVAL;
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002383
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002384 request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL);
2385 if (!request)
2386 return -ENOMEM;
2387
Johannes Bergf4173762012-12-03 18:23:37 +01002388 request->wiphy_idx = WIPHY_IDX_INVALID;
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002389 request->alpha2[0] = alpha2[0];
2390 request->alpha2[1] = alpha2[1];
Luis R. Rodrigueze12822e2010-01-04 11:37:39 -05002391 request->initiator = NL80211_REGDOM_SET_BY_USER;
Luis R. Rodriguez57b5ce02012-07-12 11:49:18 -07002392 request->user_reg_hint_type = user_reg_hint_type;
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002393
Ilan peerc37722b2015-03-30 15:15:49 +03002394 /* Allow calling CRDA again */
Johannes Bergb6863032015-10-15 09:25:18 +02002395 reset_crda_timeouts();
Ilan peerc37722b2015-03-30 15:15:49 +03002396
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002397 queue_regulatory_request(request);
2398
2399 return 0;
2400}
2401
Ilan peer05050752015-03-04 00:32:06 -05002402int regulatory_hint_indoor(bool is_indoor, u32 portid)
Ilan Peer52616f22014-02-25 16:26:00 +02002403{
Ilan peer05050752015-03-04 00:32:06 -05002404 spin_lock(&reg_indoor_lock);
Ilan Peer52616f22014-02-25 16:26:00 +02002405
Ilan peer05050752015-03-04 00:32:06 -05002406 /* It is possible that more than one user space process is trying to
2407 * configure the indoor setting. To handle such cases, clear the indoor
2408 * setting in case that some process does not think that the device
2409 * is operating in an indoor environment. In addition, if a user space
2410 * process indicates that it is controlling the indoor setting, save its
2411 * portid, i.e., make it the owner.
2412 */
2413 reg_is_indoor = is_indoor;
2414 if (reg_is_indoor) {
2415 if (!reg_is_indoor_portid)
2416 reg_is_indoor_portid = portid;
2417 } else {
2418 reg_is_indoor_portid = 0;
2419 }
Ilan Peer52616f22014-02-25 16:26:00 +02002420
Ilan peer05050752015-03-04 00:32:06 -05002421 spin_unlock(&reg_indoor_lock);
2422
2423 if (!is_indoor)
2424 reg_check_channels();
Ilan Peer52616f22014-02-25 16:26:00 +02002425
2426 return 0;
2427}
2428
Ilan peer05050752015-03-04 00:32:06 -05002429void regulatory_netlink_notify(u32 portid)
2430{
2431 spin_lock(&reg_indoor_lock);
2432
2433 if (reg_is_indoor_portid != portid) {
2434 spin_unlock(&reg_indoor_lock);
2435 return;
2436 }
2437
2438 reg_is_indoor = false;
2439 reg_is_indoor_portid = 0;
2440
2441 spin_unlock(&reg_indoor_lock);
2442
2443 reg_check_channels();
2444}
2445
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002446/* Driver hints */
2447int regulatory_hint(struct wiphy *wiphy, const char *alpha2)
2448{
2449 struct regulatory_request *request;
2450
Johannes Bergfdc9d7b2012-12-03 18:36:09 +01002451 if (WARN_ON(!alpha2 || !wiphy))
2452 return -EINVAL;
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002453
Luis R. Rodriguez4f7b9142013-12-14 20:09:06 +01002454 wiphy->regulatory_flags &= ~REGULATORY_CUSTOM_REG;
2455
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002456 request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL);
2457 if (!request)
2458 return -ENOMEM;
2459
2460 request->wiphy_idx = get_wiphy_idx(wiphy);
2461
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002462 request->alpha2[0] = alpha2[0];
2463 request->alpha2[1] = alpha2[1];
Luis R. Rodriguez7db90f42009-03-09 22:07:41 -04002464 request->initiator = NL80211_REGDOM_SET_BY_DRIVER;
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002465
Ilan peerc37722b2015-03-30 15:15:49 +03002466 /* Allow calling CRDA again */
Johannes Bergb6863032015-10-15 09:25:18 +02002467 reset_crda_timeouts();
Ilan peerc37722b2015-03-30 15:15:49 +03002468
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002469 queue_regulatory_request(request);
2470
2471 return 0;
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002472}
2473EXPORT_SYMBOL(regulatory_hint);
2474
Luis R. Rodriguez789fd032013-10-04 18:07:24 -07002475void regulatory_hint_country_ie(struct wiphy *wiphy, enum ieee80211_band band,
2476 const u8 *country_ie, u8 country_ie_len)
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -08002477{
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -08002478 char alpha2[2];
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -08002479 enum environment_cap env = ENVIRON_ANY;
Johannes Bergdb2424c2013-05-10 19:07:52 +02002480 struct regulatory_request *request = NULL, *lr;
Luis R. Rodriguezd335fe62009-02-21 00:04:27 -05002481
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -08002482 /* IE len must be evenly divisible by 2 */
2483 if (country_ie_len & 0x01)
Johannes Bergdb2424c2013-05-10 19:07:52 +02002484 return;
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -08002485
2486 if (country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
Johannes Bergdb2424c2013-05-10 19:07:52 +02002487 return;
2488
2489 request = kzalloc(sizeof(*request), GFP_KERNEL);
2490 if (!request)
2491 return;
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -08002492
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -08002493 alpha2[0] = country_ie[0];
2494 alpha2[1] = country_ie[1];
2495
2496 if (country_ie[2] == 'I')
2497 env = ENVIRON_INDOOR;
2498 else if (country_ie[2] == 'O')
2499 env = ENVIRON_OUTDOOR;
2500
Johannes Bergdb2424c2013-05-10 19:07:52 +02002501 rcu_read_lock();
2502 lr = get_last_request();
2503
2504 if (unlikely(!lr))
2505 goto out;
2506
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -05002507 /*
Luis R. Rodriguez8b19e6c2009-07-30 17:38:09 -07002508 * We will run this only upon a successful connection on cfg80211.
Luis R. Rodriguez4b44c8b2009-07-30 17:38:07 -07002509 * We leave conflict resolution to the workqueue, where can hold
Johannes Berg5fe231e2013-05-08 21:45:15 +02002510 * the RTNL.
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -05002511 */
Johannes Bergc492db32012-12-06 16:29:25 +01002512 if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE &&
2513 lr->wiphy_idx != WIPHY_IDX_INVALID)
Luis R. Rodriguez4b44c8b2009-07-30 17:38:07 -07002514 goto out;
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -08002515
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002516 request->wiphy_idx = get_wiphy_idx(wiphy);
John W. Linville4f366c52010-07-15 14:57:33 -04002517 request->alpha2[0] = alpha2[0];
2518 request->alpha2[1] = alpha2[1];
Luis R. Rodriguez7db90f42009-03-09 22:07:41 -04002519 request->initiator = NL80211_REGDOM_SET_BY_COUNTRY_IE;
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002520 request->country_ie_env = env;
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -08002521
Ilan peerc37722b2015-03-30 15:15:49 +03002522 /* Allow calling CRDA again */
Johannes Bergb6863032015-10-15 09:25:18 +02002523 reset_crda_timeouts();
Ilan peerc37722b2015-03-30 15:15:49 +03002524
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002525 queue_regulatory_request(request);
Johannes Bergdb2424c2013-05-10 19:07:52 +02002526 request = NULL;
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -08002527out:
Johannes Bergdb2424c2013-05-10 19:07:52 +02002528 kfree(request);
2529 rcu_read_unlock();
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -08002530}
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002531
Luis R. Rodriguez09d989d2010-01-29 19:58:57 -05002532static void restore_alpha2(char *alpha2, bool reset_user)
2533{
2534 /* indicates there is no alpha2 to consider for restoration */
2535 alpha2[0] = '9';
2536 alpha2[1] = '7';
2537
2538 /* The user setting has precedence over the module parameter */
2539 if (is_user_regdom_saved()) {
2540 /* Unless we're asked to ignore it and reset it */
2541 if (reset_user) {
Johannes Berg1a919312012-12-03 17:21:11 +01002542 REG_DBG_PRINT("Restoring regulatory settings including user preference\n");
Luis R. Rodriguez09d989d2010-01-29 19:58:57 -05002543 user_alpha2[0] = '9';
2544 user_alpha2[1] = '7';
2545
2546 /*
2547 * If we're ignoring user settings, we still need to
2548 * check the module parameter to ensure we put things
2549 * back as they were for a full restore.
2550 */
2551 if (!is_world_regdom(ieee80211_regdom)) {
Johannes Berg1a919312012-12-03 17:21:11 +01002552 REG_DBG_PRINT("Keeping preference on module parameter ieee80211_regdom: %c%c\n",
2553 ieee80211_regdom[0], ieee80211_regdom[1]);
Luis R. Rodriguez09d989d2010-01-29 19:58:57 -05002554 alpha2[0] = ieee80211_regdom[0];
2555 alpha2[1] = ieee80211_regdom[1];
2556 }
2557 } else {
Johannes Berg1a919312012-12-03 17:21:11 +01002558 REG_DBG_PRINT("Restoring regulatory settings while preserving user preference for: %c%c\n",
2559 user_alpha2[0], user_alpha2[1]);
Luis R. Rodriguez09d989d2010-01-29 19:58:57 -05002560 alpha2[0] = user_alpha2[0];
2561 alpha2[1] = user_alpha2[1];
2562 }
2563 } else if (!is_world_regdom(ieee80211_regdom)) {
Johannes Berg1a919312012-12-03 17:21:11 +01002564 REG_DBG_PRINT("Keeping preference on module parameter ieee80211_regdom: %c%c\n",
2565 ieee80211_regdom[0], ieee80211_regdom[1]);
Luis R. Rodriguez09d989d2010-01-29 19:58:57 -05002566 alpha2[0] = ieee80211_regdom[0];
2567 alpha2[1] = ieee80211_regdom[1];
2568 } else
Luis R. Rodriguezd91e41b2010-10-20 10:18:59 -07002569 REG_DBG_PRINT("Restoring regulatory settings\n");
Luis R. Rodriguez09d989d2010-01-29 19:58:57 -05002570}
2571
Rajkumar Manoharan5ce543d2011-12-07 21:50:08 +05302572static void restore_custom_reg_settings(struct wiphy *wiphy)
2573{
2574 struct ieee80211_supported_band *sband;
2575 enum ieee80211_band band;
2576 struct ieee80211_channel *chan;
2577 int i;
2578
2579 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
2580 sband = wiphy->bands[band];
2581 if (!sband)
2582 continue;
2583 for (i = 0; i < sband->n_channels; i++) {
2584 chan = &sband->channels[i];
2585 chan->flags = chan->orig_flags;
2586 chan->max_antenna_gain = chan->orig_mag;
2587 chan->max_power = chan->orig_mpwr;
Paul Stewart899852a2012-08-01 16:54:42 -07002588 chan->beacon_found = false;
Rajkumar Manoharan5ce543d2011-12-07 21:50:08 +05302589 }
2590 }
2591}
2592
Luis R. Rodriguez09d989d2010-01-29 19:58:57 -05002593/*
2594 * Restoring regulatory settings involves ingoring any
2595 * possibly stale country IE information and user regulatory
2596 * settings if so desired, this includes any beacon hints
2597 * learned as we could have traveled outside to another country
2598 * after disconnection. To restore regulatory settings we do
2599 * exactly what we did at bootup:
2600 *
2601 * - send a core regulatory hint
2602 * - send a user regulatory hint if applicable
2603 *
2604 * Device drivers that send a regulatory hint for a specific country
2605 * keep their own regulatory domain on wiphy->regd so that does does
2606 * not need to be remembered.
2607 */
2608static void restore_regulatory_settings(bool reset_user)
2609{
2610 char alpha2[2];
Dmitry Shmidtcee0bec2011-12-19 12:32:21 -08002611 char world_alpha2[2];
Luis R. Rodriguez09d989d2010-01-29 19:58:57 -05002612 struct reg_beacon *reg_beacon, *btmp;
Luis R. Rodriguez14609552011-04-05 10:49:03 -07002613 LIST_HEAD(tmp_reg_req_list);
Rajkumar Manoharan5ce543d2011-12-07 21:50:08 +05302614 struct cfg80211_registered_device *rdev;
Luis R. Rodriguez09d989d2010-01-29 19:58:57 -05002615
Johannes Berg5fe231e2013-05-08 21:45:15 +02002616 ASSERT_RTNL();
2617
Ilan peer05050752015-03-04 00:32:06 -05002618 /*
2619 * Clear the indoor setting in case that it is not controlled by user
2620 * space, as otherwise there is no guarantee that the device is still
2621 * operating in an indoor environment.
2622 */
2623 spin_lock(&reg_indoor_lock);
2624 if (reg_is_indoor && !reg_is_indoor_portid) {
2625 reg_is_indoor = false;
2626 reg_check_channels();
2627 }
2628 spin_unlock(&reg_indoor_lock);
Ilan Peer52616f22014-02-25 16:26:00 +02002629
Johannes Berg2d319862013-01-09 12:01:38 +01002630 reset_regdomains(true, &world_regdom);
Luis R. Rodriguez09d989d2010-01-29 19:58:57 -05002631 restore_alpha2(alpha2, reset_user);
2632
Luis R. Rodriguez14609552011-04-05 10:49:03 -07002633 /*
2634 * If there's any pending requests we simply
2635 * stash them to a temporary pending queue and
2636 * add then after we've restored regulatory
2637 * settings.
2638 */
2639 spin_lock(&reg_requests_lock);
Ilan peereeca9fc2015-03-04 00:32:07 -05002640 list_splice_tail_init(&reg_requests_list, &tmp_reg_req_list);
Luis R. Rodriguez14609552011-04-05 10:49:03 -07002641 spin_unlock(&reg_requests_lock);
2642
Luis R. Rodriguez09d989d2010-01-29 19:58:57 -05002643 /* Clear beacon hints */
2644 spin_lock_bh(&reg_pending_beacons_lock);
Johannes Bergfea9bce2012-12-03 17:32:01 +01002645 list_for_each_entry_safe(reg_beacon, btmp, &reg_pending_beacons, list) {
2646 list_del(&reg_beacon->list);
2647 kfree(reg_beacon);
Luis R. Rodriguez09d989d2010-01-29 19:58:57 -05002648 }
2649 spin_unlock_bh(&reg_pending_beacons_lock);
2650
Johannes Bergfea9bce2012-12-03 17:32:01 +01002651 list_for_each_entry_safe(reg_beacon, btmp, &reg_beacon_list, list) {
2652 list_del(&reg_beacon->list);
2653 kfree(reg_beacon);
Luis R. Rodriguez09d989d2010-01-29 19:58:57 -05002654 }
2655
2656 /* First restore to the basic regulatory settings */
Johannes Berg379b82f2012-12-06 15:44:07 +01002657 world_alpha2[0] = cfg80211_world_regdom->alpha2[0];
2658 world_alpha2[1] = cfg80211_world_regdom->alpha2[1];
Luis R. Rodriguez09d989d2010-01-29 19:58:57 -05002659
Rajkumar Manoharan5ce543d2011-12-07 21:50:08 +05302660 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
Jonathan Doronb0d7aa52014-12-15 19:26:00 +02002661 if (rdev->wiphy.regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED)
2662 continue;
Luis R. Rodrigueza2f73b62013-11-11 22:15:29 +01002663 if (rdev->wiphy.regulatory_flags & REGULATORY_CUSTOM_REG)
Rajkumar Manoharan5ce543d2011-12-07 21:50:08 +05302664 restore_custom_reg_settings(&rdev->wiphy);
2665 }
2666
Dmitry Shmidtcee0bec2011-12-19 12:32:21 -08002667 regulatory_hint_core(world_alpha2);
Luis R. Rodriguez09d989d2010-01-29 19:58:57 -05002668
2669 /*
2670 * This restores the ieee80211_regdom module parameter
2671 * preference or the last user requested regulatory
2672 * settings, user regulatory settings takes precedence.
2673 */
2674 if (is_an_alpha2(alpha2))
Maciej S. Szmigiero549cc1c2015-09-02 19:00:31 +02002675 regulatory_hint_user(alpha2, NL80211_USER_REG_HINT_USER);
Luis R. Rodriguez09d989d2010-01-29 19:58:57 -05002676
Luis R. Rodriguez14609552011-04-05 10:49:03 -07002677 spin_lock(&reg_requests_lock);
Johannes Berg11cff962012-12-03 18:56:41 +01002678 list_splice_tail_init(&tmp_reg_req_list, &reg_requests_list);
Luis R. Rodriguez14609552011-04-05 10:49:03 -07002679 spin_unlock(&reg_requests_lock);
2680
Luis R. Rodriguez14609552011-04-05 10:49:03 -07002681 REG_DBG_PRINT("Kicking the queue\n");
2682
2683 schedule_work(&reg_work);
2684}
Luis R. Rodriguez09d989d2010-01-29 19:58:57 -05002685
2686void regulatory_hint_disconnect(void)
2687{
Johannes Berg1a919312012-12-03 17:21:11 +01002688 REG_DBG_PRINT("All devices are disconnected, going to restore regulatory settings\n");
Luis R. Rodriguez09d989d2010-01-29 19:58:57 -05002689 restore_regulatory_settings(false);
2690}
2691
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05002692static bool freq_is_chan_12_13_14(u16 freq)
2693{
Bruno Randolf59eb21a2011-01-17 13:37:28 +09002694 if (freq == ieee80211_channel_to_frequency(12, IEEE80211_BAND_2GHZ) ||
2695 freq == ieee80211_channel_to_frequency(13, IEEE80211_BAND_2GHZ) ||
2696 freq == ieee80211_channel_to_frequency(14, IEEE80211_BAND_2GHZ))
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05002697 return true;
2698 return false;
2699}
2700
Luis R. Rodriguez3ebfa6e2012-12-19 10:53:02 -08002701static bool pending_reg_beacon(struct ieee80211_channel *beacon_chan)
2702{
2703 struct reg_beacon *pending_beacon;
2704
2705 list_for_each_entry(pending_beacon, &reg_pending_beacons, list)
2706 if (beacon_chan->center_freq ==
2707 pending_beacon->chan.center_freq)
2708 return true;
2709 return false;
2710}
2711
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05002712int regulatory_hint_found_beacon(struct wiphy *wiphy,
2713 struct ieee80211_channel *beacon_chan,
2714 gfp_t gfp)
2715{
2716 struct reg_beacon *reg_beacon;
Luis R. Rodriguez3ebfa6e2012-12-19 10:53:02 -08002717 bool processing;
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05002718
Johannes Berg1a919312012-12-03 17:21:11 +01002719 if (beacon_chan->beacon_found ||
2720 beacon_chan->flags & IEEE80211_CHAN_RADAR ||
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05002721 (beacon_chan->band == IEEE80211_BAND_2GHZ &&
Johannes Berg1a919312012-12-03 17:21:11 +01002722 !freq_is_chan_12_13_14(beacon_chan->center_freq)))
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05002723 return 0;
2724
Luis R. Rodriguez3ebfa6e2012-12-19 10:53:02 -08002725 spin_lock_bh(&reg_pending_beacons_lock);
2726 processing = pending_reg_beacon(beacon_chan);
2727 spin_unlock_bh(&reg_pending_beacons_lock);
2728
2729 if (processing)
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05002730 return 0;
2731
2732 reg_beacon = kzalloc(sizeof(struct reg_beacon), gfp);
2733 if (!reg_beacon)
2734 return -ENOMEM;
2735
Johannes Berg1a919312012-12-03 17:21:11 +01002736 REG_DBG_PRINT("Found new beacon on frequency: %d MHz (Ch %d) on %s\n",
Luis R. Rodriguez4113f752010-01-04 11:50:11 -05002737 beacon_chan->center_freq,
2738 ieee80211_frequency_to_channel(beacon_chan->center_freq),
2739 wiphy_name(wiphy));
2740
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05002741 memcpy(&reg_beacon->chan, beacon_chan,
Johannes Berg1a919312012-12-03 17:21:11 +01002742 sizeof(struct ieee80211_channel));
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05002743
2744 /*
2745 * Since we can be called from BH or and non-BH context
2746 * we must use spin_lock_bh()
2747 */
2748 spin_lock_bh(&reg_pending_beacons_lock);
2749 list_add_tail(&reg_beacon->list, &reg_pending_beacons);
2750 spin_unlock_bh(&reg_pending_beacons_lock);
2751
2752 schedule_work(&reg_work);
2753
2754 return 0;
2755}
2756
Johannes Berga3d2eaf2008-09-15 11:10:52 +02002757static void print_rd_rules(const struct ieee80211_regdomain *rd)
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002758{
2759 unsigned int i;
Johannes Berga3d2eaf2008-09-15 11:10:52 +02002760 const struct ieee80211_reg_rule *reg_rule = NULL;
2761 const struct ieee80211_freq_range *freq_range = NULL;
2762 const struct ieee80211_power_rule *power_rule = NULL;
Janusz Dziedzic089027e2014-02-21 19:46:12 +01002763 char bw[32], cac_time[32];
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002764
Janusz Dziedzic089027e2014-02-21 19:46:12 +01002765 pr_info(" (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp), (dfs_cac_time)\n");
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002766
2767 for (i = 0; i < rd->n_reg_rules; i++) {
2768 reg_rule = &rd->reg_rules[i];
2769 freq_range = &reg_rule->freq_range;
2770 power_rule = &reg_rule->power_rule;
2771
Janusz Dziedzicb0dfd2e2014-02-20 13:52:16 +01002772 if (reg_rule->flags & NL80211_RRF_AUTO_BW)
2773 snprintf(bw, sizeof(bw), "%d KHz, %d KHz AUTO",
2774 freq_range->max_bandwidth_khz,
Janusz Dziedzic97524822014-01-30 09:52:20 +01002775 reg_get_max_bandwidth(rd, reg_rule));
2776 else
Janusz Dziedzicb0dfd2e2014-02-20 13:52:16 +01002777 snprintf(bw, sizeof(bw), "%d KHz",
Janusz Dziedzic97524822014-01-30 09:52:20 +01002778 freq_range->max_bandwidth_khz);
2779
Janusz Dziedzic089027e2014-02-21 19:46:12 +01002780 if (reg_rule->flags & NL80211_RRF_DFS)
2781 scnprintf(cac_time, sizeof(cac_time), "%u s",
2782 reg_rule->dfs_cac_ms/1000);
2783 else
2784 scnprintf(cac_time, sizeof(cac_time), "N/A");
2785
2786
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -05002787 /*
2788 * There may not be documentation for max antenna gain
2789 * in certain regions
2790 */
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002791 if (power_rule->max_antenna_gain)
Janusz Dziedzic089027e2014-02-21 19:46:12 +01002792 pr_info(" (%d KHz - %d KHz @ %s), (%d mBi, %d mBm), (%s)\n",
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002793 freq_range->start_freq_khz,
2794 freq_range->end_freq_khz,
Janusz Dziedzic97524822014-01-30 09:52:20 +01002795 bw,
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002796 power_rule->max_antenna_gain,
Janusz Dziedzic089027e2014-02-21 19:46:12 +01002797 power_rule->max_eirp,
2798 cac_time);
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002799 else
Janusz Dziedzic089027e2014-02-21 19:46:12 +01002800 pr_info(" (%d KHz - %d KHz @ %s), (N/A, %d mBm), (%s)\n",
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002801 freq_range->start_freq_khz,
2802 freq_range->end_freq_khz,
Janusz Dziedzic97524822014-01-30 09:52:20 +01002803 bw,
Janusz Dziedzic089027e2014-02-21 19:46:12 +01002804 power_rule->max_eirp,
2805 cac_time);
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002806 }
2807}
2808
Luis R. Rodriguez4c7d3982013-11-13 18:54:02 +01002809bool reg_supported_dfs_region(enum nl80211_dfs_regions dfs_region)
Luis R. Rodriguez8b60b072011-10-11 10:59:02 -07002810{
2811 switch (dfs_region) {
2812 case NL80211_DFS_UNSET:
2813 case NL80211_DFS_FCC:
2814 case NL80211_DFS_ETSI:
2815 case NL80211_DFS_JP:
2816 return true;
2817 default:
2818 REG_DBG_PRINT("Ignoring uknown DFS master region: %d\n",
2819 dfs_region);
2820 return false;
2821 }
2822}
2823
Johannes Berga3d2eaf2008-09-15 11:10:52 +02002824static void print_regdomain(const struct ieee80211_regdomain *rd)
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002825{
Johannes Bergc492db32012-12-06 16:29:25 +01002826 struct regulatory_request *lr = get_last_request();
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002827
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -08002828 if (is_intersected_alpha2(rd->alpha2)) {
Johannes Bergc492db32012-12-06 16:29:25 +01002829 if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) {
Johannes Berg79c97e92009-07-07 03:56:12 +02002830 struct cfg80211_registered_device *rdev;
Johannes Bergc492db32012-12-06 16:29:25 +01002831 rdev = cfg80211_rdev_by_wiphy_idx(lr->wiphy_idx);
Johannes Berg79c97e92009-07-07 03:56:12 +02002832 if (rdev) {
Joe Perchese9c02682010-11-16 19:56:49 -08002833 pr_info("Current regulatory domain updated by AP to: %c%c\n",
Johannes Berg79c97e92009-07-07 03:56:12 +02002834 rdev->country_ie_alpha2[0],
2835 rdev->country_ie_alpha2[1]);
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -08002836 } else
Joe Perchese9c02682010-11-16 19:56:49 -08002837 pr_info("Current regulatory domain intersected:\n");
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -08002838 } else
Joe Perchese9c02682010-11-16 19:56:49 -08002839 pr_info("Current regulatory domain intersected:\n");
Johannes Berg1a919312012-12-03 17:21:11 +01002840 } else if (is_world_regdom(rd->alpha2)) {
Joe Perchese9c02682010-11-16 19:56:49 -08002841 pr_info("World regulatory domain updated:\n");
Johannes Berg1a919312012-12-03 17:21:11 +01002842 } else {
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002843 if (is_unknown_alpha2(rd->alpha2))
Joe Perchese9c02682010-11-16 19:56:49 -08002844 pr_info("Regulatory domain changed to driver built-in settings (unknown country)\n");
Luis R. Rodriguez57b5ce02012-07-12 11:49:18 -07002845 else {
Johannes Bergc492db32012-12-06 16:29:25 +01002846 if (reg_request_cell_base(lr))
Johannes Berg1a919312012-12-03 17:21:11 +01002847 pr_info("Regulatory domain changed to country: %c%c by Cell Station\n",
Luis R. Rodriguez57b5ce02012-07-12 11:49:18 -07002848 rd->alpha2[0], rd->alpha2[1]);
2849 else
Johannes Berg1a919312012-12-03 17:21:11 +01002850 pr_info("Regulatory domain changed to country: %c%c\n",
Luis R. Rodriguez57b5ce02012-07-12 11:49:18 -07002851 rd->alpha2[0], rd->alpha2[1]);
2852 }
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002853 }
Johannes Berg1a919312012-12-03 17:21:11 +01002854
Luis R. Rodriguez3ef121b2013-11-13 18:54:05 +01002855 pr_info(" DFS Master region: %s", reg_dfs_region_str(rd->dfs_region));
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002856 print_rd_rules(rd);
2857}
2858
Johannes Berg2df78162008-10-28 16:49:41 +01002859static void print_regdomain_info(const struct ieee80211_regdomain *rd)
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002860{
Joe Perchese9c02682010-11-16 19:56:49 -08002861 pr_info("Regulatory domain: %c%c\n", rd->alpha2[0], rd->alpha2[1]);
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002862 print_rd_rules(rd);
2863}
2864
Luis R. Rodriguez3b9e5ac2013-11-05 09:18:14 -08002865static int reg_set_rd_core(const struct ieee80211_regdomain *rd)
2866{
2867 if (!is_world_regdom(rd->alpha2))
2868 return -EINVAL;
2869 update_world_regdomain(rd);
2870 return 0;
2871}
2872
Luis R. Rodriguez84721d42013-11-05 09:18:15 -08002873static int reg_set_rd_user(const struct ieee80211_regdomain *rd,
2874 struct regulatory_request *user_request)
2875{
2876 const struct ieee80211_regdomain *intersected_rd = NULL;
2877
Luis R. Rodriguez84721d42013-11-05 09:18:15 -08002878 if (!regdom_changes(rd->alpha2))
2879 return -EALREADY;
2880
2881 if (!is_valid_rd(rd)) {
2882 pr_err("Invalid regulatory domain detected:\n");
2883 print_regdomain_info(rd);
2884 return -EINVAL;
2885 }
2886
2887 if (!user_request->intersect) {
2888 reset_regdomains(false, rd);
2889 return 0;
2890 }
2891
2892 intersected_rd = regdom_intersect(rd, get_cfg80211_regdom());
2893 if (!intersected_rd)
2894 return -EINVAL;
2895
2896 kfree(rd);
2897 rd = NULL;
2898 reset_regdomains(false, intersected_rd);
2899
2900 return 0;
2901}
2902
Luis R. Rodriguezf5fe3242013-11-05 09:18:16 -08002903static int reg_set_rd_driver(const struct ieee80211_regdomain *rd,
2904 struct regulatory_request *driver_request)
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002905{
Johannes Berge9763c32012-12-03 16:59:46 +01002906 const struct ieee80211_regdomain *regd;
Luis R. Rodriguez9c964772008-10-30 13:33:53 -07002907 const struct ieee80211_regdomain *intersected_rd = NULL;
Luis R. Rodriguezf5fe3242013-11-05 09:18:16 -08002908 const struct ieee80211_regdomain *tmp;
Luis R. Rodriguez806a9e32009-02-21 00:04:26 -05002909 struct wiphy *request_wiphy;
Johannes Berg6913b492012-12-04 00:48:59 +01002910
Luis R. Rodriguezf5fe3242013-11-05 09:18:16 -08002911 if (is_world_regdom(rd->alpha2))
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002912 return -EINVAL;
2913
Luis R. Rodriguezf5fe3242013-11-05 09:18:16 -08002914 if (!regdom_changes(rd->alpha2))
2915 return -EALREADY;
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002916
Luis R. Rodriguez8375af32008-11-12 14:21:57 -08002917 if (!is_valid_rd(rd)) {
Joe Perchese9c02682010-11-16 19:56:49 -08002918 pr_err("Invalid regulatory domain detected:\n");
Luis R. Rodriguez8375af32008-11-12 14:21:57 -08002919 print_regdomain_info(rd);
2920 return -EINVAL;
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002921 }
2922
Luis R. Rodriguezf5fe3242013-11-05 09:18:16 -08002923 request_wiphy = wiphy_idx_to_wiphy(driver_request->wiphy_idx);
Johannes Berg922ec582015-10-15 09:12:49 +02002924 if (!request_wiphy)
Johannes Bergde3584b2011-11-21 10:44:00 +01002925 return -ENODEV;
Luis R. Rodriguez806a9e32009-02-21 00:04:26 -05002926
Luis R. Rodriguezf5fe3242013-11-05 09:18:16 -08002927 if (!driver_request->intersect) {
Luis R. Rodriguez558f6d32009-06-08 18:54:37 -07002928 if (request_wiphy->regd)
2929 return -EALREADY;
Luis R. Rodriguez3e0c3ff2009-01-07 17:43:34 -08002930
Johannes Berge9763c32012-12-03 16:59:46 +01002931 regd = reg_copy_regd(rd);
2932 if (IS_ERR(regd))
2933 return PTR_ERR(regd);
Luis R. Rodriguez3e0c3ff2009-01-07 17:43:34 -08002934
Johannes Berg458f4f92012-12-06 15:47:38 +01002935 rcu_assign_pointer(request_wiphy->regd, regd);
Johannes Berg379b82f2012-12-06 15:44:07 +01002936 reset_regdomains(false, rd);
Luis R. Rodriguezb8295ac2008-11-12 14:21:58 -08002937 return 0;
2938 }
2939
Luis R. Rodriguezf5fe3242013-11-05 09:18:16 -08002940 intersected_rd = regdom_intersect(rd, get_cfg80211_regdom());
2941 if (!intersected_rd)
2942 return -EINVAL;
Luis R. Rodriguezb8295ac2008-11-12 14:21:58 -08002943
Luis R. Rodriguezf5fe3242013-11-05 09:18:16 -08002944 /*
2945 * We can trash what CRDA provided now.
2946 * However if a driver requested this specific regulatory
2947 * domain we keep it for its private use
2948 */
2949 tmp = get_wiphy_regdom(request_wiphy);
2950 rcu_assign_pointer(request_wiphy->regd, rd);
2951 rcu_free_regdom(tmp);
Luis R. Rodriguezb8295ac2008-11-12 14:21:58 -08002952
Luis R. Rodriguezf5fe3242013-11-05 09:18:16 -08002953 rd = NULL;
Larry Fingerb7566fc2013-02-04 15:33:44 -06002954
Luis R. Rodriguezf5fe3242013-11-05 09:18:16 -08002955 reset_regdomains(false, intersected_rd);
Luis R. Rodriguez3e0c3ff2009-01-07 17:43:34 -08002956
Luis R. Rodriguezf5fe3242013-11-05 09:18:16 -08002957 return 0;
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002958}
2959
Luis R. Rodriguez01992402013-11-05 09:18:17 -08002960static int reg_set_rd_country_ie(const struct ieee80211_regdomain *rd,
2961 struct regulatory_request *country_ie_request)
Luis R. Rodriguezf5fe3242013-11-05 09:18:16 -08002962{
2963 struct wiphy *request_wiphy;
2964
2965 if (!is_alpha2_set(rd->alpha2) && !is_an_alpha2(rd->alpha2) &&
2966 !is_unknown_alpha2(rd->alpha2))
2967 return -EINVAL;
2968
2969 /*
2970 * Lets only bother proceeding on the same alpha2 if the current
2971 * rd is non static (it means CRDA was present and was used last)
2972 * and the pending request came in from a country IE
2973 */
2974
2975 if (!is_valid_rd(rd)) {
2976 pr_err("Invalid regulatory domain detected:\n");
2977 print_regdomain_info(rd);
2978 return -EINVAL;
2979 }
2980
Luis R. Rodriguez01992402013-11-05 09:18:17 -08002981 request_wiphy = wiphy_idx_to_wiphy(country_ie_request->wiphy_idx);
Johannes Berg922ec582015-10-15 09:12:49 +02002982 if (!request_wiphy)
Luis R. Rodriguezf5fe3242013-11-05 09:18:16 -08002983 return -ENODEV;
Luis R. Rodriguezf5fe3242013-11-05 09:18:16 -08002984
Luis R. Rodriguez01992402013-11-05 09:18:17 -08002985 if (country_ie_request->intersect)
Luis R. Rodriguezf5fe3242013-11-05 09:18:16 -08002986 return -EINVAL;
2987
2988 reset_regdomains(false, rd);
2989 return 0;
2990}
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002991
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -05002992/*
2993 * Use this call to set the current regulatory domain. Conflicts with
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002994 * multiple drivers can be ironed out later. Caller must've already
Johannes Berg458f4f92012-12-06 15:47:38 +01002995 * kmalloc'd the rd structure.
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -05002996 */
Ilan peerc37722b2015-03-30 15:15:49 +03002997int set_regdom(const struct ieee80211_regdomain *rd,
2998 enum ieee80211_regd_source regd_src)
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002999{
Johannes Bergc492db32012-12-06 16:29:25 +01003000 struct regulatory_request *lr;
Janusz Dziedzic092008a2014-02-14 08:54:00 +01003001 bool user_reset = false;
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07003002 int r;
3003
Luis R. Rodriguez3b9e5ac2013-11-05 09:18:14 -08003004 if (!reg_is_valid_request(rd->alpha2)) {
3005 kfree(rd);
3006 return -EINVAL;
3007 }
3008
Ilan peerc37722b2015-03-30 15:15:49 +03003009 if (regd_src == REGD_SOURCE_CRDA)
Johannes Bergb6863032015-10-15 09:25:18 +02003010 reset_crda_timeouts();
Ilan peerc37722b2015-03-30 15:15:49 +03003011
Johannes Bergc492db32012-12-06 16:29:25 +01003012 lr = get_last_request();
Luis R. Rodriguezabc73812009-07-30 17:38:08 -07003013
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07003014 /* Note that this doesn't update the wiphys, this is done below */
Luis R. Rodriguez3b9e5ac2013-11-05 09:18:14 -08003015 switch (lr->initiator) {
3016 case NL80211_REGDOM_SET_BY_CORE:
3017 r = reg_set_rd_core(rd);
3018 break;
3019 case NL80211_REGDOM_SET_BY_USER:
Luis R. Rodriguez84721d42013-11-05 09:18:15 -08003020 r = reg_set_rd_user(rd, lr);
Janusz Dziedzic092008a2014-02-14 08:54:00 +01003021 user_reset = true;
Luis R. Rodriguez84721d42013-11-05 09:18:15 -08003022 break;
Luis R. Rodriguez3b9e5ac2013-11-05 09:18:14 -08003023 case NL80211_REGDOM_SET_BY_DRIVER:
Luis R. Rodriguezf5fe3242013-11-05 09:18:16 -08003024 r = reg_set_rd_driver(rd, lr);
3025 break;
Luis R. Rodriguez3b9e5ac2013-11-05 09:18:14 -08003026 case NL80211_REGDOM_SET_BY_COUNTRY_IE:
Luis R. Rodriguez01992402013-11-05 09:18:17 -08003027 r = reg_set_rd_country_ie(rd, lr);
Luis R. Rodriguez3b9e5ac2013-11-05 09:18:14 -08003028 break;
3029 default:
3030 WARN(1, "invalid initiator %d\n", lr->initiator);
3031 return -EINVAL;
3032 }
3033
Johannes Bergd2372b32008-10-24 20:32:20 +02003034 if (r) {
Janusz Dziedzic092008a2014-02-14 08:54:00 +01003035 switch (r) {
3036 case -EALREADY:
Kalle Valo95908532012-07-12 15:33:58 +03003037 reg_set_request_processed();
Janusz Dziedzic092008a2014-02-14 08:54:00 +01003038 break;
3039 default:
3040 /* Back to world regulatory in case of errors */
3041 restore_regulatory_settings(user_reset);
3042 }
Kalle Valo95908532012-07-12 15:33:58 +03003043
Johannes Bergd2372b32008-10-24 20:32:20 +02003044 kfree(rd);
Johannes Berg38fd2142013-05-10 19:17:17 +02003045 return r;
Johannes Bergd2372b32008-10-24 20:32:20 +02003046 }
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07003047
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07003048 /* This would make this whole thing pointless */
Johannes Berg38fd2142013-05-10 19:17:17 +02003049 if (WARN_ON(!lr->intersect && rd != get_cfg80211_regdom()))
3050 return -EINVAL;
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07003051
3052 /* update all wiphys now with the new established regulatory domain */
Johannes Bergc492db32012-12-06 16:29:25 +01003053 update_all_wiphy_regulatory(lr->initiator);
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07003054
Johannes Berg458f4f92012-12-06 15:47:38 +01003055 print_regdomain(get_cfg80211_regdom());
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07003056
Johannes Bergc492db32012-12-06 16:29:25 +01003057 nl80211_send_reg_change_event(lr);
Luis R. Rodriguez73d54c92009-03-09 22:07:42 -04003058
Luis R. Rodriguezb2e253c2010-11-17 21:46:09 -08003059 reg_set_request_processed();
3060
Johannes Berg38fd2142013-05-10 19:17:17 +02003061 return 0;
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07003062}
3063
Arik Nemtsov2c3e8612015-01-07 16:47:19 +02003064static int __regulatory_set_wiphy_regd(struct wiphy *wiphy,
3065 struct ieee80211_regdomain *rd)
Jonathan Doronb0d7aa52014-12-15 19:26:00 +02003066{
3067 const struct ieee80211_regdomain *regd;
3068 const struct ieee80211_regdomain *prev_regd;
3069 struct cfg80211_registered_device *rdev;
3070
3071 if (WARN_ON(!wiphy || !rd))
3072 return -EINVAL;
3073
3074 if (WARN(!(wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED),
3075 "wiphy should have REGULATORY_WIPHY_SELF_MANAGED\n"))
3076 return -EPERM;
3077
3078 if (WARN(!is_valid_rd(rd), "Invalid regulatory domain detected\n")) {
3079 print_regdomain_info(rd);
3080 return -EINVAL;
3081 }
3082
3083 regd = reg_copy_regd(rd);
3084 if (IS_ERR(regd))
3085 return PTR_ERR(regd);
3086
3087 rdev = wiphy_to_rdev(wiphy);
3088
3089 spin_lock(&reg_requests_lock);
3090 prev_regd = rdev->requested_regd;
3091 rdev->requested_regd = regd;
3092 spin_unlock(&reg_requests_lock);
3093
3094 kfree(prev_regd);
Arik Nemtsov2c3e8612015-01-07 16:47:19 +02003095 return 0;
3096}
3097
3098int regulatory_set_wiphy_regd(struct wiphy *wiphy,
3099 struct ieee80211_regdomain *rd)
3100{
3101 int ret = __regulatory_set_wiphy_regd(wiphy, rd);
3102
3103 if (ret)
3104 return ret;
Jonathan Doronb0d7aa52014-12-15 19:26:00 +02003105
3106 schedule_work(&reg_work);
3107 return 0;
3108}
3109EXPORT_SYMBOL(regulatory_set_wiphy_regd);
3110
Arik Nemtsov2c3e8612015-01-07 16:47:19 +02003111int regulatory_set_wiphy_regd_sync_rtnl(struct wiphy *wiphy,
3112 struct ieee80211_regdomain *rd)
3113{
3114 int ret;
3115
3116 ASSERT_RTNL();
3117
3118 ret = __regulatory_set_wiphy_regd(wiphy, rd);
3119 if (ret)
3120 return ret;
3121
3122 /* process the request immediately */
3123 reg_process_self_managed_hints();
3124 return 0;
3125}
3126EXPORT_SYMBOL(regulatory_set_wiphy_regd_sync_rtnl);
3127
Luis R. Rodriguez57b5ce02012-07-12 11:49:18 -07003128void wiphy_regulatory_register(struct wiphy *wiphy)
3129{
Arik Nemtsov23df0b72013-07-21 16:36:48 +03003130 struct regulatory_request *lr;
3131
Jonathan Doronb0d7aa52014-12-15 19:26:00 +02003132 /* self-managed devices ignore external hints */
3133 if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED)
3134 wiphy->regulatory_flags |= REGULATORY_DISABLE_BEACON_HINTS |
3135 REGULATORY_COUNTRY_IE_IGNORE;
3136
Luis R. Rodriguez57b5ce02012-07-12 11:49:18 -07003137 if (!reg_dev_ignore_cell_hint(wiphy))
3138 reg_num_devs_support_basehint++;
3139
Arik Nemtsov23df0b72013-07-21 16:36:48 +03003140 lr = get_last_request();
3141 wiphy_update_regulatory(wiphy, lr->initiator);
Luis R. Rodriguez57b5ce02012-07-12 11:49:18 -07003142}
3143
Luis R. Rodriguezbfead082012-07-12 11:49:19 -07003144void wiphy_regulatory_deregister(struct wiphy *wiphy)
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -08003145{
Luis R. Rodriguez0ad8aca2009-03-24 21:21:08 -04003146 struct wiphy *request_wiphy = NULL;
Johannes Bergc492db32012-12-06 16:29:25 +01003147 struct regulatory_request *lr;
Luis R. Rodriguez761cf7e2009-02-21 00:04:25 -05003148
Johannes Bergc492db32012-12-06 16:29:25 +01003149 lr = get_last_request();
Luis R. Rodriguezabc73812009-07-30 17:38:08 -07003150
Luis R. Rodriguez57b5ce02012-07-12 11:49:18 -07003151 if (!reg_dev_ignore_cell_hint(wiphy))
3152 reg_num_devs_support_basehint--;
3153
Johannes Berg458f4f92012-12-06 15:47:38 +01003154 rcu_free_regdom(get_wiphy_regdom(wiphy));
Monam Agarwal34dd8862014-03-24 00:53:40 +05303155 RCU_INIT_POINTER(wiphy->regd, NULL);
Chris Wright0ef9ccd2009-04-24 14:09:31 -07003156
Johannes Bergc492db32012-12-06 16:29:25 +01003157 if (lr)
3158 request_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx);
Luis R. Rodriguez806a9e32009-02-21 00:04:26 -05003159
Chris Wright0ef9ccd2009-04-24 14:09:31 -07003160 if (!request_wiphy || request_wiphy != wiphy)
Johannes Berg38fd2142013-05-10 19:17:17 +02003161 return;
Chris Wright0ef9ccd2009-04-24 14:09:31 -07003162
Johannes Bergc492db32012-12-06 16:29:25 +01003163 lr->wiphy_idx = WIPHY_IDX_INVALID;
3164 lr->country_ie_env = ENVIRON_ANY;
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -08003165}
3166
Ilan Peer174e0cd2014-02-23 09:13:01 +02003167/*
3168 * See http://www.fcc.gov/document/5-ghz-unlicensed-spectrum-unii, for
3169 * UNII band definitions
3170 */
3171int cfg80211_get_unii(int freq)
3172{
3173 /* UNII-1 */
3174 if (freq >= 5150 && freq <= 5250)
3175 return 0;
3176
3177 /* UNII-2A */
3178 if (freq > 5250 && freq <= 5350)
3179 return 1;
3180
3181 /* UNII-2B */
3182 if (freq > 5350 && freq <= 5470)
3183 return 2;
3184
3185 /* UNII-2C */
3186 if (freq > 5470 && freq <= 5725)
3187 return 3;
3188
3189 /* UNII-3 */
3190 if (freq > 5725 && freq <= 5825)
3191 return 4;
3192
3193 return -EINVAL;
3194}
3195
Ilan Peerc8866e52014-02-23 09:13:03 +02003196bool regulatory_indoor_allowed(void)
3197{
3198 return reg_is_indoor;
3199}
3200
Uwe Kleine-König2fcc9f72010-06-18 09:38:55 +02003201int __init regulatory_init(void)
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07003202{
Luis R. Rodriguezbcf4f992009-02-21 00:04:24 -05003203 int err = 0;
Johannes Berg734366d2008-09-15 10:56:48 +02003204
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07003205 reg_pdev = platform_device_register_simple("regulatory", 0, NULL, 0);
3206 if (IS_ERR(reg_pdev))
3207 return PTR_ERR(reg_pdev);
Johannes Berg734366d2008-09-15 10:56:48 +02003208
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05003209 spin_lock_init(&reg_requests_lock);
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05003210 spin_lock_init(&reg_pending_beacons_lock);
Ilan peer05050752015-03-04 00:32:06 -05003211 spin_lock_init(&reg_indoor_lock);
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05003212
Luis R. Rodriguez80007ef2012-03-23 07:23:31 -07003213 reg_regdb_size_check();
3214
Johannes Berg458f4f92012-12-06 15:47:38 +01003215 rcu_assign_pointer(cfg80211_regdomain, cfg80211_world_regdom);
Johannes Berg734366d2008-09-15 10:56:48 +02003216
Luis R. Rodriguez09d989d2010-01-29 19:58:57 -05003217 user_alpha2[0] = '9';
3218 user_alpha2[1] = '7';
3219
Luis R. Rodriguezae9e4b02009-07-14 20:23:15 -04003220 /* We always try to get an update for the static regdomain */
Johannes Berg458f4f92012-12-06 15:47:38 +01003221 err = regulatory_hint_core(cfg80211_world_regdom->alpha2);
Luis R. Rodriguezbcf4f992009-02-21 00:04:24 -05003222 if (err) {
3223 if (err == -ENOMEM)
3224 return err;
3225 /*
3226 * N.B. kobject_uevent_env() can fail mainly for when we're out
3227 * memory which is handled and propagated appropriately above
3228 * but it can also fail during a netlink_broadcast() or during
3229 * early boot for call_usermodehelper(). For now treat these
3230 * errors as non-fatal.
3231 */
Joe Perchese9c02682010-11-16 19:56:49 -08003232 pr_err("kobject_uevent_env() was unable to call CRDA during init\n");
Luis R. Rodriguezbcf4f992009-02-21 00:04:24 -05003233 }
Johannes Berg734366d2008-09-15 10:56:48 +02003234
Luis R. Rodriguezae9e4b02009-07-14 20:23:15 -04003235 /*
3236 * Finally, if the user set the module parameter treat it
3237 * as a user hint.
3238 */
3239 if (!is_world_regdom(ieee80211_regdom))
Luis R. Rodriguez57b5ce02012-07-12 11:49:18 -07003240 regulatory_hint_user(ieee80211_regdom,
3241 NL80211_USER_REG_HINT_USER);
Luis R. Rodriguezae9e4b02009-07-14 20:23:15 -04003242
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07003243 return 0;
3244}
3245
Johannes Berg1a919312012-12-03 17:21:11 +01003246void regulatory_exit(void)
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07003247{
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05003248 struct regulatory_request *reg_request, *tmp;
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05003249 struct reg_beacon *reg_beacon, *btmp;
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05003250
3251 cancel_work_sync(&reg_work);
Johannes Bergb6863032015-10-15 09:25:18 +02003252 cancel_crda_timeout_sync();
Arik Nemtsovad932f02014-11-27 09:44:55 +02003253 cancel_delayed_work_sync(&reg_check_chans);
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05003254
Johannes Berg9027b142012-12-03 17:59:24 +01003255 /* Lock to suppress warnings */
Johannes Berg38fd2142013-05-10 19:17:17 +02003256 rtnl_lock();
Johannes Berg379b82f2012-12-06 15:44:07 +01003257 reset_regdomains(true, NULL);
Johannes Berg38fd2142013-05-10 19:17:17 +02003258 rtnl_unlock();
Johannes Berg734366d2008-09-15 10:56:48 +02003259
Luis R. Rodriguez58ebacc2011-11-08 14:28:06 -08003260 dev_set_uevent_suppress(&reg_pdev->dev, true);
Johannes Bergf6037d02008-10-21 11:01:33 +02003261
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07003262 platform_device_unregister(reg_pdev);
Johannes Berg734366d2008-09-15 10:56:48 +02003263
Johannes Bergfea9bce2012-12-03 17:32:01 +01003264 list_for_each_entry_safe(reg_beacon, btmp, &reg_pending_beacons, list) {
3265 list_del(&reg_beacon->list);
3266 kfree(reg_beacon);
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05003267 }
3268
Johannes Bergfea9bce2012-12-03 17:32:01 +01003269 list_for_each_entry_safe(reg_beacon, btmp, &reg_beacon_list, list) {
3270 list_del(&reg_beacon->list);
3271 kfree(reg_beacon);
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05003272 }
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05003273
Johannes Bergfea9bce2012-12-03 17:32:01 +01003274 list_for_each_entry_safe(reg_request, tmp, &reg_requests_list, list) {
3275 list_del(&reg_request->list);
3276 kfree(reg_request);
Johannes Berg8318d782008-01-24 19:38:38 +01003277 }
Johannes Berg8318d782008-01-24 19:38:38 +01003278}