blob: bc29c9a754a557b05d604a90b841a8eebe3b3394 [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
Ilan peerc37722b2015-03-30 15:15:49 +0300138/* Max number of consecutive attempts to communicate with CRDA */
139#define REG_MAX_CRDA_TIMEOUTS 10
140
141static u32 reg_crda_timeouts;
142
Johannes Berg458f4f92012-12-06 15:47:38 +0100143static const struct ieee80211_regdomain *get_cfg80211_regdom(void)
144{
Johannes Berg38fd2142013-05-10 19:17:17 +0200145 return rtnl_dereference(cfg80211_regdomain);
Johannes Berg458f4f92012-12-06 15:47:38 +0100146}
147
Arik Nemtsovad30ca22014-12-15 19:25:59 +0200148const struct ieee80211_regdomain *get_wiphy_regdom(struct wiphy *wiphy)
Johannes Berg458f4f92012-12-06 15:47:38 +0100149{
Johannes Berg38fd2142013-05-10 19:17:17 +0200150 return rtnl_dereference(wiphy->regd);
Johannes Berg458f4f92012-12-06 15:47:38 +0100151}
152
Luis R. Rodriguez3ef121b2013-11-13 18:54:05 +0100153static const char *reg_dfs_region_str(enum nl80211_dfs_regions dfs_region)
154{
155 switch (dfs_region) {
156 case NL80211_DFS_UNSET:
157 return "unset";
158 case NL80211_DFS_FCC:
159 return "FCC";
160 case NL80211_DFS_ETSI:
161 return "ETSI";
162 case NL80211_DFS_JP:
163 return "JP";
164 }
165 return "Unknown";
166}
167
Luis R. Rodriguez6c474792013-11-25 20:56:09 +0100168enum nl80211_dfs_regions reg_get_dfs_region(struct wiphy *wiphy)
169{
170 const struct ieee80211_regdomain *regd = NULL;
171 const struct ieee80211_regdomain *wiphy_regd = NULL;
172
173 regd = get_cfg80211_regdom();
174 if (!wiphy)
175 goto out;
176
177 wiphy_regd = get_wiphy_regdom(wiphy);
178 if (!wiphy_regd)
179 goto out;
180
181 if (wiphy_regd->dfs_region == regd->dfs_region)
182 goto out;
183
184 REG_DBG_PRINT("%s: device specific dfs_region "
185 "(%s) disagrees with cfg80211's "
186 "central dfs_region (%s)\n",
187 dev_name(&wiphy->dev),
188 reg_dfs_region_str(wiphy_regd->dfs_region),
189 reg_dfs_region_str(regd->dfs_region));
190
191out:
192 return regd->dfs_region;
193}
194
Johannes Berg458f4f92012-12-06 15:47:38 +0100195static void rcu_free_regdom(const struct ieee80211_regdomain *r)
196{
197 if (!r)
198 return;
199 kfree_rcu((struct ieee80211_regdomain *)r, rcu_head);
200}
201
Johannes Bergc492db32012-12-06 16:29:25 +0100202static struct regulatory_request *get_last_request(void)
203{
Johannes Berg38fd2142013-05-10 19:17:17 +0200204 return rcu_dereference_rtnl(last_request);
Johannes Bergc492db32012-12-06 16:29:25 +0100205}
206
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -0500207/* Used to queue up regulatory hints */
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -0500208static LIST_HEAD(reg_requests_list);
209static spinlock_t reg_requests_lock;
210
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -0500211/* Used to queue up beacon hints for review */
212static LIST_HEAD(reg_pending_beacons);
213static spinlock_t reg_pending_beacons_lock;
214
215/* Used to keep track of processed beacon hints */
216static LIST_HEAD(reg_beacon_list);
217
218struct reg_beacon {
219 struct list_head list;
220 struct ieee80211_channel chan;
221};
222
Arik Nemtsovad932f02014-11-27 09:44:55 +0200223static void reg_check_chans_work(struct work_struct *work);
224static DECLARE_DELAYED_WORK(reg_check_chans, reg_check_chans_work);
225
Luis R. Rodriguezf333a7a2010-11-17 21:46:07 -0800226static void reg_todo(struct work_struct *work);
227static DECLARE_WORK(reg_work, reg_todo);
228
Luis R. Rodrigueza90c7a32011-04-05 10:49:04 -0700229static void reg_timeout_work(struct work_struct *work);
230static DECLARE_DELAYED_WORK(reg_timeout, reg_timeout_work);
231
Johannes Berg734366d2008-09-15 10:56:48 +0200232/* We keep a static world regulatory domain in case of the absence of CRDA */
233static const struct ieee80211_regdomain world_regdom = {
Jason Abele28981e52015-02-17 16:10:41 -0800234 .n_reg_rules = 8,
Johannes Berg734366d2008-09-15 10:56:48 +0200235 .alpha2 = "00",
236 .reg_rules = {
Luis R. Rodriguez68798a62009-02-21 00:20:37 -0500237 /* IEEE 802.11b/g, channels 1..11 */
238 REG_RULE(2412-10, 2462+10, 40, 6, 20, 0),
Johannes Berg43c771a2012-11-12 10:51:34 +0100239 /* IEEE 802.11b/g, channels 12..13. */
240 REG_RULE(2467-10, 2472+10, 40, 6, 20,
Luis R. Rodriguez8fe02e12013-10-21 19:22:25 +0200241 NL80211_RRF_NO_IR),
Luis R. Rodriguez611b6a82009-03-05 21:19:21 -0800242 /* IEEE 802.11 channel 14 - Only JP enables
243 * this and for 802.11b only */
244 REG_RULE(2484-10, 2484+10, 20, 6, 20,
Luis R. Rodriguez8fe02e12013-10-21 19:22:25 +0200245 NL80211_RRF_NO_IR |
Luis R. Rodriguez611b6a82009-03-05 21:19:21 -0800246 NL80211_RRF_NO_OFDM),
247 /* IEEE 802.11a, channel 36..48 */
Johannes Berg131a19b2013-03-04 20:54:46 +0100248 REG_RULE(5180-10, 5240+10, 160, 6, 20,
Luis R. Rodriguez8fe02e12013-10-21 19:22:25 +0200249 NL80211_RRF_NO_IR),
Luis R. Rodriguez3fc71f72009-02-21 00:20:38 -0500250
Johannes Berg131a19b2013-03-04 20:54:46 +0100251 /* IEEE 802.11a, channel 52..64 - DFS required */
252 REG_RULE(5260-10, 5320+10, 160, 6, 20,
Luis R. Rodriguez8fe02e12013-10-21 19:22:25 +0200253 NL80211_RRF_NO_IR |
Johannes Berg131a19b2013-03-04 20:54:46 +0100254 NL80211_RRF_DFS),
255
256 /* IEEE 802.11a, channel 100..144 - DFS required */
257 REG_RULE(5500-10, 5720+10, 160, 6, 20,
Luis R. Rodriguez8fe02e12013-10-21 19:22:25 +0200258 NL80211_RRF_NO_IR |
Johannes Berg131a19b2013-03-04 20:54:46 +0100259 NL80211_RRF_DFS),
Luis R. Rodriguez3fc71f72009-02-21 00:20:38 -0500260
261 /* IEEE 802.11a, channel 149..165 */
Johannes Berg8ab9d852012-12-03 22:09:22 +0100262 REG_RULE(5745-10, 5825+10, 80, 6, 20,
Luis R. Rodriguez8fe02e12013-10-21 19:22:25 +0200263 NL80211_RRF_NO_IR),
Vladimir Kondratiev90cdc6d2012-07-02 09:32:34 +0300264
Johannes Berg8047d262015-10-15 16:16:09 +0200265 /* IEEE 802.11ad (60GHz), channels 1..3 */
Vladimir Kondratiev90cdc6d2012-07-02 09:32:34 +0300266 REG_RULE(56160+2160*1-1080, 56160+2160*3+1080, 2160, 0, 0, 0),
Johannes Berg734366d2008-09-15 10:56:48 +0200267 }
268};
269
Johannes Berg38fd2142013-05-10 19:17:17 +0200270/* protected by RTNL */
Johannes Berga3d2eaf2008-09-15 11:10:52 +0200271static const struct ieee80211_regdomain *cfg80211_world_regdom =
272 &world_regdom;
Johannes Berg734366d2008-09-15 10:56:48 +0200273
Luis R. Rodriguez6ee7d332009-03-20 23:53:06 -0400274static char *ieee80211_regdom = "00";
Luis R. Rodriguez09d989d2010-01-29 19:58:57 -0500275static char user_alpha2[2];
Luis R. Rodriguez6ee7d332009-03-20 23:53:06 -0400276
Johannes Berg734366d2008-09-15 10:56:48 +0200277module_param(ieee80211_regdom, charp, 0444);
278MODULE_PARM_DESC(ieee80211_regdom, "IEEE 802.11 regulatory domain code");
279
Arik Nemtsovc8883932014-04-21 20:39:34 -0700280static void reg_free_request(struct regulatory_request *request)
Luis R. Rodriguez5ad6ef52013-11-05 09:18:08 -0800281{
Arik Nemtsovc8883932014-04-21 20:39:34 -0700282 if (request != get_last_request())
283 kfree(request);
284}
285
286static void reg_free_last_request(void)
287{
288 struct regulatory_request *lr = get_last_request();
289
Luis R. Rodriguez5ad6ef52013-11-05 09:18:08 -0800290 if (lr != &core_request_world && lr)
291 kfree_rcu(lr, rcu_head);
292}
293
Luis R. Rodriguez05f1a3e2013-11-05 09:18:09 -0800294static void reg_update_last_request(struct regulatory_request *request)
295{
Luis R. Rodriguez255e25b2014-02-25 17:09:40 -0800296 struct regulatory_request *lr;
297
298 lr = get_last_request();
299 if (lr == request)
300 return;
301
Arik Nemtsovc8883932014-04-21 20:39:34 -0700302 reg_free_last_request();
Luis R. Rodriguez05f1a3e2013-11-05 09:18:09 -0800303 rcu_assign_pointer(last_request, request);
304}
305
Johannes Berg379b82f2012-12-06 15:44:07 +0100306static void reset_regdomains(bool full_reset,
307 const struct ieee80211_regdomain *new_regdom)
Johannes Berg734366d2008-09-15 10:56:48 +0200308{
Johannes Berg458f4f92012-12-06 15:47:38 +0100309 const struct ieee80211_regdomain *r;
310
Johannes Berg38fd2142013-05-10 19:17:17 +0200311 ASSERT_RTNL();
Johannes Berge8da2bb2012-12-03 23:00:08 +0100312
Johannes Berg458f4f92012-12-06 15:47:38 +0100313 r = get_cfg80211_regdom();
314
Johannes Berg942b25c2008-09-15 11:26:47 +0200315 /* avoid freeing static information or freeing something twice */
Johannes Berg458f4f92012-12-06 15:47:38 +0100316 if (r == cfg80211_world_regdom)
317 r = NULL;
Johannes Berg942b25c2008-09-15 11:26:47 +0200318 if (cfg80211_world_regdom == &world_regdom)
319 cfg80211_world_regdom = NULL;
Johannes Berg458f4f92012-12-06 15:47:38 +0100320 if (r == &world_regdom)
321 r = NULL;
Johannes Berg942b25c2008-09-15 11:26:47 +0200322
Johannes Berg458f4f92012-12-06 15:47:38 +0100323 rcu_free_regdom(r);
324 rcu_free_regdom(cfg80211_world_regdom);
Johannes Berg734366d2008-09-15 10:56:48 +0200325
Johannes Berga3d2eaf2008-09-15 11:10:52 +0200326 cfg80211_world_regdom = &world_regdom;
Johannes Berg458f4f92012-12-06 15:47:38 +0100327 rcu_assign_pointer(cfg80211_regdomain, new_regdom);
Luis R. Rodrigueza0429942011-11-28 16:47:15 -0500328
329 if (!full_reset)
330 return;
331
Luis R. Rodriguez05f1a3e2013-11-05 09:18:09 -0800332 reg_update_last_request(&core_request_world);
Johannes Berg734366d2008-09-15 10:56:48 +0200333}
334
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -0500335/*
336 * Dynamic world regulatory domain requested by the wireless
337 * core upon initialization
338 */
Johannes Berga3d2eaf2008-09-15 11:10:52 +0200339static void update_world_regdomain(const struct ieee80211_regdomain *rd)
Johannes Berg734366d2008-09-15 10:56:48 +0200340{
Johannes Bergc492db32012-12-06 16:29:25 +0100341 struct regulatory_request *lr;
Johannes Berg734366d2008-09-15 10:56:48 +0200342
Johannes Bergc492db32012-12-06 16:29:25 +0100343 lr = get_last_request();
344
345 WARN_ON(!lr);
Johannes Berge8da2bb2012-12-03 23:00:08 +0100346
Johannes Berg379b82f2012-12-06 15:44:07 +0100347 reset_regdomains(false, rd);
Johannes Berg734366d2008-09-15 10:56:48 +0200348
349 cfg80211_world_regdom = rd;
Johannes Berg734366d2008-09-15 10:56:48 +0200350}
Johannes Berg734366d2008-09-15 10:56:48 +0200351
Johannes Berga3d2eaf2008-09-15 11:10:52 +0200352bool is_world_regdom(const char *alpha2)
Johannes Berg8318d782008-01-24 19:38:38 +0100353{
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700354 if (!alpha2)
355 return false;
Johannes Berg1a919312012-12-03 17:21:11 +0100356 return alpha2[0] == '0' && alpha2[1] == '0';
Johannes Berg8318d782008-01-24 19:38:38 +0100357}
358
Johannes Berga3d2eaf2008-09-15 11:10:52 +0200359static bool is_alpha2_set(const char *alpha2)
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700360{
361 if (!alpha2)
362 return false;
Johannes Berg1a919312012-12-03 17:21:11 +0100363 return alpha2[0] && alpha2[1];
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700364}
Johannes Berg8318d782008-01-24 19:38:38 +0100365
Johannes Berga3d2eaf2008-09-15 11:10:52 +0200366static bool is_unknown_alpha2(const char *alpha2)
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700367{
368 if (!alpha2)
369 return false;
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -0500370 /*
371 * Special case where regulatory domain was built by driver
372 * but a specific alpha2 cannot be determined
373 */
Johannes Berg1a919312012-12-03 17:21:11 +0100374 return alpha2[0] == '9' && alpha2[1] == '9';
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700375}
376
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -0800377static bool is_intersected_alpha2(const char *alpha2)
378{
379 if (!alpha2)
380 return false;
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -0500381 /*
382 * Special case where regulatory domain is the
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -0800383 * result of an intersection between two regulatory domain
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -0500384 * structures
385 */
Johannes Berg1a919312012-12-03 17:21:11 +0100386 return alpha2[0] == '9' && alpha2[1] == '8';
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -0800387}
388
Johannes Berga3d2eaf2008-09-15 11:10:52 +0200389static bool is_an_alpha2(const char *alpha2)
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700390{
391 if (!alpha2)
392 return false;
Johannes Berg1a919312012-12-03 17:21:11 +0100393 return isalpha(alpha2[0]) && isalpha(alpha2[1]);
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700394}
395
Johannes Berga3d2eaf2008-09-15 11:10:52 +0200396static bool alpha2_equal(const char *alpha2_x, const char *alpha2_y)
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700397{
398 if (!alpha2_x || !alpha2_y)
399 return false;
Johannes Berg1a919312012-12-03 17:21:11 +0100400 return alpha2_x[0] == alpha2_y[0] && alpha2_x[1] == alpha2_y[1];
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700401}
402
Luis R. Rodriguez69b15722009-02-21 00:04:33 -0500403static bool regdom_changes(const char *alpha2)
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700404{
Johannes Berg458f4f92012-12-06 15:47:38 +0100405 const struct ieee80211_regdomain *r = get_cfg80211_regdom();
Luis R. Rodriguez761cf7e2009-02-21 00:04:25 -0500406
Johannes Berg458f4f92012-12-06 15:47:38 +0100407 if (!r)
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700408 return true;
Johannes Berg458f4f92012-12-06 15:47:38 +0100409 return !alpha2_equal(r->alpha2, alpha2);
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700410}
411
Luis R. Rodriguez09d989d2010-01-29 19:58:57 -0500412/*
413 * The NL80211_REGDOM_SET_BY_USER regdom alpha2 is cached, this lets
414 * you know if a valid regulatory hint with NL80211_REGDOM_SET_BY_USER
415 * has ever been issued.
416 */
417static bool is_user_regdom_saved(void)
418{
419 if (user_alpha2[0] == '9' && user_alpha2[1] == '7')
420 return false;
421
422 /* This would indicate a mistake on the design */
Johannes Berg1a919312012-12-03 17:21:11 +0100423 if (WARN(!is_world_regdom(user_alpha2) && !is_an_alpha2(user_alpha2),
Luis R. Rodriguez09d989d2010-01-29 19:58:57 -0500424 "Unexpected user alpha2: %c%c\n",
Johannes Berg1a919312012-12-03 17:21:11 +0100425 user_alpha2[0], user_alpha2[1]))
Luis R. Rodriguez09d989d2010-01-29 19:58:57 -0500426 return false;
427
428 return true;
429}
430
Johannes Berge9763c32012-12-03 16:59:46 +0100431static const struct ieee80211_regdomain *
432reg_copy_regd(const struct ieee80211_regdomain *src_regd)
John W. Linville3b377ea2009-12-18 17:59:01 -0500433{
434 struct ieee80211_regdomain *regd;
Johannes Berge9763c32012-12-03 16:59:46 +0100435 int size_of_regd;
John W. Linville3b377ea2009-12-18 17:59:01 -0500436 unsigned int i;
437
Johannes Berg82f20852012-12-04 12:49:16 +0100438 size_of_regd =
439 sizeof(struct ieee80211_regdomain) +
440 src_regd->n_reg_rules * sizeof(struct ieee80211_reg_rule);
John W. Linville3b377ea2009-12-18 17:59:01 -0500441
442 regd = kzalloc(size_of_regd, GFP_KERNEL);
443 if (!regd)
Johannes Berge9763c32012-12-03 16:59:46 +0100444 return ERR_PTR(-ENOMEM);
John W. Linville3b377ea2009-12-18 17:59:01 -0500445
446 memcpy(regd, src_regd, sizeof(struct ieee80211_regdomain));
447
448 for (i = 0; i < src_regd->n_reg_rules; i++)
449 memcpy(&regd->reg_rules[i], &src_regd->reg_rules[i],
Johannes Berge9763c32012-12-03 16:59:46 +0100450 sizeof(struct ieee80211_reg_rule));
John W. Linville3b377ea2009-12-18 17:59:01 -0500451
Johannes Berge9763c32012-12-03 16:59:46 +0100452 return regd;
John W. Linville3b377ea2009-12-18 17:59:01 -0500453}
454
455#ifdef CONFIG_CFG80211_INTERNAL_REGDB
Johannes Bergc7d319e2015-10-15 09:03:05 +0200456struct reg_regdb_apply_request {
John W. Linville3b377ea2009-12-18 17:59:01 -0500457 struct list_head list;
Johannes Bergc7d319e2015-10-15 09:03:05 +0200458 const struct ieee80211_regdomain *regdom;
John W. Linville3b377ea2009-12-18 17:59:01 -0500459};
460
Johannes Bergc7d319e2015-10-15 09:03:05 +0200461static LIST_HEAD(reg_regdb_apply_list);
462static DEFINE_MUTEX(reg_regdb_apply_mutex);
John W. Linville3b377ea2009-12-18 17:59:01 -0500463
Johannes Bergc7d319e2015-10-15 09:03:05 +0200464static void reg_regdb_apply(struct work_struct *work)
John W. Linville3b377ea2009-12-18 17:59:01 -0500465{
Johannes Bergc7d319e2015-10-15 09:03:05 +0200466 struct reg_regdb_apply_request *request;
Luis R. Rodrigueza85d0d72012-09-14 15:36:57 -0700467
Johannes Berg5fe231e2013-05-08 21:45:15 +0200468 rtnl_lock();
John W. Linville3b377ea2009-12-18 17:59:01 -0500469
Johannes Bergc7d319e2015-10-15 09:03:05 +0200470 mutex_lock(&reg_regdb_apply_mutex);
471 while (!list_empty(&reg_regdb_apply_list)) {
472 request = list_first_entry(&reg_regdb_apply_list,
473 struct reg_regdb_apply_request,
John W. Linville3b377ea2009-12-18 17:59:01 -0500474 list);
475 list_del(&request->list);
476
Johannes Bergc7d319e2015-10-15 09:03:05 +0200477 set_regdom(request->regdom, REGD_SOURCE_INTERNAL_DB);
John W. Linville3b377ea2009-12-18 17:59:01 -0500478 kfree(request);
479 }
Johannes Bergc7d319e2015-10-15 09:03:05 +0200480 mutex_unlock(&reg_regdb_apply_mutex);
Luis R. Rodrigueza85d0d72012-09-14 15:36:57 -0700481
Johannes Berg5fe231e2013-05-08 21:45:15 +0200482 rtnl_unlock();
John W. Linville3b377ea2009-12-18 17:59:01 -0500483}
484
Johannes Bergc7d319e2015-10-15 09:03:05 +0200485static DECLARE_WORK(reg_regdb_work, reg_regdb_apply);
John W. Linville3b377ea2009-12-18 17:59:01 -0500486
Johannes Bergc7d319e2015-10-15 09:03:05 +0200487static int reg_regdb_query(const char *alpha2)
John W. Linville3b377ea2009-12-18 17:59:01 -0500488{
Johannes Bergc7d319e2015-10-15 09:03:05 +0200489 const struct ieee80211_regdomain *regdom = NULL;
490 struct reg_regdb_apply_request *request;
491 unsigned int i;
John W. Linville3b377ea2009-12-18 17:59:01 -0500492
Johannes Bergc7d319e2015-10-15 09:03:05 +0200493 for (i = 0; i < reg_regdb_size; i++) {
494 if (alpha2_equal(alpha2, reg_regdb[i]->alpha2)) {
495 regdom = reg_regdb[i];
496 break;
497 }
498 }
499
500 if (!regdom)
501 return -ENODATA;
502
503 request = kzalloc(sizeof(struct reg_regdb_apply_request), GFP_KERNEL);
John W. Linville3b377ea2009-12-18 17:59:01 -0500504 if (!request)
Johannes Bergc7d319e2015-10-15 09:03:05 +0200505 return -ENOMEM;
John W. Linville3b377ea2009-12-18 17:59:01 -0500506
Johannes Bergc7d319e2015-10-15 09:03:05 +0200507 request->regdom = reg_copy_regd(regdom);
508 if (IS_ERR_OR_NULL(request->regdom)) {
509 kfree(request);
510 return -ENOMEM;
511 }
John W. Linville3b377ea2009-12-18 17:59:01 -0500512
Johannes Bergc7d319e2015-10-15 09:03:05 +0200513 mutex_lock(&reg_regdb_apply_mutex);
514 list_add_tail(&request->list, &reg_regdb_apply_list);
515 mutex_unlock(&reg_regdb_apply_mutex);
John W. Linville3b377ea2009-12-18 17:59:01 -0500516
517 schedule_work(&reg_regdb_work);
Johannes Bergc7d319e2015-10-15 09:03:05 +0200518
519 return 0;
John W. Linville3b377ea2009-12-18 17:59:01 -0500520}
Luis R. Rodriguez80007ef2012-03-23 07:23:31 -0700521
522/* Feel free to add any other sanity checks here */
523static void reg_regdb_size_check(void)
524{
525 /* We should ideally BUILD_BUG_ON() but then random builds would fail */
526 WARN_ONCE(!reg_regdb_size, "db.txt is empty, you should update it...");
527}
John W. Linville3b377ea2009-12-18 17:59:01 -0500528#else
Luis R. Rodriguez80007ef2012-03-23 07:23:31 -0700529static inline void reg_regdb_size_check(void) {}
Johannes Bergc7d319e2015-10-15 09:03:05 +0200530static inline int reg_regdb_query(const char *alpha2)
531{
532 return -ENODATA;
533}
John W. Linville3b377ea2009-12-18 17:59:01 -0500534#endif /* CONFIG_CFG80211_INTERNAL_REGDB */
535
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -0500536/*
537 * This lets us keep regulatory code which is updated on a regulatory
Johannes Berg1226d252014-02-25 15:43:36 +0100538 * basis in userspace.
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -0500539 */
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700540static int call_crda(const char *alpha2)
541{
Johannes Berg1226d252014-02-25 15:43:36 +0100542 char country[12];
543 char *env[] = { country, NULL };
Johannes Bergc7d319e2015-10-15 09:03:05 +0200544 int ret;
Johannes Berg1226d252014-02-25 15:43:36 +0100545
546 snprintf(country, sizeof(country), "COUNTRY=%c%c",
547 alpha2[0], alpha2[1]);
548
Ilan peerc37722b2015-03-30 15:15:49 +0300549 if (reg_crda_timeouts > REG_MAX_CRDA_TIMEOUTS) {
Thomas Petazzoni042ab5f2015-07-09 15:35:15 +0200550 pr_debug("Exceeded CRDA call max attempts. Not calling CRDA\n");
Ilan peerc37722b2015-03-30 15:15:49 +0300551 return -EINVAL;
552 }
553
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700554 if (!is_world_regdom((char *) alpha2))
Thomas Petazzoni042ab5f2015-07-09 15:35:15 +0200555 pr_debug("Calling CRDA for country: %c%c\n",
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700556 alpha2[0], alpha2[1]);
557 else
Thomas Petazzoni042ab5f2015-07-09 15:35:15 +0200558 pr_debug("Calling CRDA to update world regulatory domain\n");
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700559
Johannes Bergc7d319e2015-10-15 09:03:05 +0200560 ret = kobject_uevent_env(&reg_pdev->dev.kobj, KOBJ_CHANGE, env);
561 if (ret)
562 return ret;
563
564 queue_delayed_work(system_power_efficient_wq,
565 &reg_timeout, msecs_to_jiffies(3142));
566 return 0;
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700567}
568
Johannes Bergcecbb062015-10-15 08:47:34 +0200569static bool reg_query_database(struct regulatory_request *request)
Luis R. Rodriguezfe6631f2013-11-05 09:18:10 -0800570{
Johannes Bergc7d319e2015-10-15 09:03:05 +0200571 /* query internal regulatory database (if it exists) */
572 if (reg_regdb_query(request->alpha2) == 0)
573 return true;
Ilan peereeca9fc2015-03-04 00:32:07 -0500574
Johannes Bergc7d319e2015-10-15 09:03:05 +0200575 if (call_crda(request->alpha2) == 0)
576 return true;
577
578 return false;
Luis R. Rodriguezfe6631f2013-11-05 09:18:10 -0800579}
580
Luis R. Rodrigueze4387682013-11-05 09:18:01 -0800581bool reg_is_valid_request(const char *alpha2)
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700582{
Johannes Bergc492db32012-12-06 16:29:25 +0100583 struct regulatory_request *lr = get_last_request();
Luis R. Rodriguez61405e92009-05-13 17:04:41 -0400584
Johannes Bergc492db32012-12-06 16:29:25 +0100585 if (!lr || lr->processed)
Johannes Bergf6037d02008-10-21 11:01:33 +0200586 return false;
587
Johannes Bergc492db32012-12-06 16:29:25 +0100588 return alpha2_equal(lr->alpha2, alpha2);
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700589}
590
Janusz Dziedzice3961af2014-01-25 11:24:11 +0100591static const struct ieee80211_regdomain *reg_get_regdomain(struct wiphy *wiphy)
592{
593 struct regulatory_request *lr = get_last_request();
594
595 /*
596 * Follow the driver's regulatory domain, if present, unless a country
597 * IE has been processed or a user wants to help complaince further
598 */
599 if (lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE &&
600 lr->initiator != NL80211_REGDOM_SET_BY_USER &&
601 wiphy->regd)
602 return get_wiphy_regdom(wiphy);
603
604 return get_cfg80211_regdom();
605}
606
Arik Nemtsova6d4a532014-10-23 09:37:33 +0300607static unsigned int
608reg_get_max_bandwidth_from_range(const struct ieee80211_regdomain *rd,
609 const struct ieee80211_reg_rule *rule)
Janusz Dziedzic97524822014-01-30 09:52:20 +0100610{
611 const struct ieee80211_freq_range *freq_range = &rule->freq_range;
612 const struct ieee80211_freq_range *freq_range_tmp;
613 const struct ieee80211_reg_rule *tmp;
614 u32 start_freq, end_freq, idx, no;
615
616 for (idx = 0; idx < rd->n_reg_rules; idx++)
617 if (rule == &rd->reg_rules[idx])
618 break;
619
620 if (idx == rd->n_reg_rules)
621 return 0;
622
623 /* get start_freq */
624 no = idx;
625
626 while (no) {
627 tmp = &rd->reg_rules[--no];
628 freq_range_tmp = &tmp->freq_range;
629
630 if (freq_range_tmp->end_freq_khz < freq_range->start_freq_khz)
631 break;
632
Janusz Dziedzic97524822014-01-30 09:52:20 +0100633 freq_range = freq_range_tmp;
634 }
635
636 start_freq = freq_range->start_freq_khz;
637
638 /* get end_freq */
639 freq_range = &rule->freq_range;
640 no = idx;
641
642 while (no < rd->n_reg_rules - 1) {
643 tmp = &rd->reg_rules[++no];
644 freq_range_tmp = &tmp->freq_range;
645
646 if (freq_range_tmp->start_freq_khz > freq_range->end_freq_khz)
647 break;
648
Janusz Dziedzic97524822014-01-30 09:52:20 +0100649 freq_range = freq_range_tmp;
650 }
651
652 end_freq = freq_range->end_freq_khz;
653
654 return end_freq - start_freq;
655}
656
Arik Nemtsova6d4a532014-10-23 09:37:33 +0300657unsigned int reg_get_max_bandwidth(const struct ieee80211_regdomain *rd,
658 const struct ieee80211_reg_rule *rule)
659{
660 unsigned int bw = reg_get_max_bandwidth_from_range(rd, rule);
661
662 if (rule->flags & NL80211_RRF_NO_160MHZ)
663 bw = min_t(unsigned int, bw, MHZ_TO_KHZ(80));
664 if (rule->flags & NL80211_RRF_NO_80MHZ)
665 bw = min_t(unsigned int, bw, MHZ_TO_KHZ(40));
666
667 /*
668 * HT40+/HT40- limits are handled per-channel. Only limit BW if both
669 * are not allowed.
670 */
671 if (rule->flags & NL80211_RRF_NO_HT40MINUS &&
672 rule->flags & NL80211_RRF_NO_HT40PLUS)
673 bw = min_t(unsigned int, bw, MHZ_TO_KHZ(20));
674
675 return bw;
676}
677
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700678/* Sanity check on a regulatory rule */
Johannes Berga3d2eaf2008-09-15 11:10:52 +0200679static bool is_valid_reg_rule(const struct ieee80211_reg_rule *rule)
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700680{
Johannes Berga3d2eaf2008-09-15 11:10:52 +0200681 const struct ieee80211_freq_range *freq_range = &rule->freq_range;
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700682 u32 freq_diff;
683
Luis R. Rodriguez91e99002008-11-12 14:21:55 -0800684 if (freq_range->start_freq_khz <= 0 || freq_range->end_freq_khz <= 0)
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700685 return false;
686
687 if (freq_range->start_freq_khz > freq_range->end_freq_khz)
688 return false;
689
690 freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz;
691
Roel Kluinbd05f282009-03-03 22:55:21 +0100692 if (freq_range->end_freq_khz <= freq_range->start_freq_khz ||
Johannes Berg1a919312012-12-03 17:21:11 +0100693 freq_range->max_bandwidth_khz > freq_diff)
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700694 return false;
695
696 return true;
697}
698
Johannes Berga3d2eaf2008-09-15 11:10:52 +0200699static bool is_valid_rd(const struct ieee80211_regdomain *rd)
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700700{
Johannes Berga3d2eaf2008-09-15 11:10:52 +0200701 const struct ieee80211_reg_rule *reg_rule = NULL;
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700702 unsigned int i;
703
704 if (!rd->n_reg_rules)
705 return false;
706
Luis R. Rodriguez88dc1c32008-11-12 14:22:01 -0800707 if (WARN_ON(rd->n_reg_rules > NL80211_MAX_SUPP_REG_RULES))
708 return false;
709
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700710 for (i = 0; i < rd->n_reg_rules; i++) {
711 reg_rule = &rd->reg_rules[i];
712 if (!is_valid_reg_rule(reg_rule))
713 return false;
714 }
715
716 return true;
717}
718
Luis R. Rodriguez038659e2009-05-02 00:37:17 -0400719static bool reg_does_bw_fit(const struct ieee80211_freq_range *freq_range,
Johannes Bergfe7ef5e2012-12-04 15:07:34 +0100720 u32 center_freq_khz, u32 bw_khz)
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700721{
Luis R. Rodriguez038659e2009-05-02 00:37:17 -0400722 u32 start_freq_khz, end_freq_khz;
723
724 start_freq_khz = center_freq_khz - (bw_khz/2);
725 end_freq_khz = center_freq_khz + (bw_khz/2);
726
727 if (start_freq_khz >= freq_range->start_freq_khz &&
728 end_freq_khz <= freq_range->end_freq_khz)
729 return true;
730
731 return false;
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700732}
733
Luis R. Rodriguez0c7dc452009-01-07 17:43:36 -0800734/**
735 * freq_in_rule_band - tells us if a frequency is in a frequency band
736 * @freq_range: frequency rule we want to query
737 * @freq_khz: frequency we are inquiring about
738 *
739 * This lets us know if a specific frequency rule is or is not relevant to
740 * a specific frequency's band. Bands are device specific and artificial
Vladimir Kondratiev64629b92012-09-23 09:49:54 +0200741 * definitions (the "2.4 GHz band", the "5 GHz band" and the "60GHz band"),
742 * however it is safe for now to assume that a frequency rule should not be
743 * part of a frequency's band if the start freq or end freq are off by more
744 * than 2 GHz for the 2.4 and 5 GHz bands, and by more than 10 GHz for the
745 * 60 GHz band.
Luis R. Rodriguez0c7dc452009-01-07 17:43:36 -0800746 * This resolution can be lowered and should be considered as we add
747 * regulatory rule support for other "bands".
748 **/
749static bool freq_in_rule_band(const struct ieee80211_freq_range *freq_range,
Johannes Berg1a919312012-12-03 17:21:11 +0100750 u32 freq_khz)
Luis R. Rodriguez0c7dc452009-01-07 17:43:36 -0800751{
752#define ONE_GHZ_IN_KHZ 1000000
Vladimir Kondratiev64629b92012-09-23 09:49:54 +0200753 /*
754 * From 802.11ad: directional multi-gigabit (DMG):
755 * Pertaining to operation in a frequency band containing a channel
756 * with the Channel starting frequency above 45 GHz.
757 */
758 u32 limit = freq_khz > 45 * ONE_GHZ_IN_KHZ ?
759 10 * ONE_GHZ_IN_KHZ : 2 * ONE_GHZ_IN_KHZ;
760 if (abs(freq_khz - freq_range->start_freq_khz) <= limit)
Luis R. Rodriguez0c7dc452009-01-07 17:43:36 -0800761 return true;
Vladimir Kondratiev64629b92012-09-23 09:49:54 +0200762 if (abs(freq_khz - freq_range->end_freq_khz) <= limit)
Luis R. Rodriguez0c7dc452009-01-07 17:43:36 -0800763 return true;
764 return false;
765#undef ONE_GHZ_IN_KHZ
766}
767
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -0500768/*
Luis R. Rodriguezadbfb052013-11-13 18:54:03 +0100769 * Later on we can perhaps use the more restrictive DFS
770 * region but we don't have information for that yet so
771 * for now simply disallow conflicts.
772 */
773static enum nl80211_dfs_regions
774reg_intersect_dfs_region(const enum nl80211_dfs_regions dfs_region1,
775 const enum nl80211_dfs_regions dfs_region2)
776{
777 if (dfs_region1 != dfs_region2)
778 return NL80211_DFS_UNSET;
779 return dfs_region1;
780}
781
782/*
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -0500783 * Helper for regdom_intersect(), this does the real
784 * mathematical intersection fun
785 */
Janusz Dziedzic97524822014-01-30 09:52:20 +0100786static int reg_rules_intersect(const struct ieee80211_regdomain *rd1,
787 const struct ieee80211_regdomain *rd2,
788 const struct ieee80211_reg_rule *rule1,
Johannes Berg1a919312012-12-03 17:21:11 +0100789 const struct ieee80211_reg_rule *rule2,
790 struct ieee80211_reg_rule *intersected_rule)
Luis R. Rodriguez9c964772008-10-30 13:33:53 -0700791{
792 const struct ieee80211_freq_range *freq_range1, *freq_range2;
793 struct ieee80211_freq_range *freq_range;
794 const struct ieee80211_power_rule *power_rule1, *power_rule2;
795 struct ieee80211_power_rule *power_rule;
Janusz Dziedzic97524822014-01-30 09:52:20 +0100796 u32 freq_diff, max_bandwidth1, max_bandwidth2;
Luis R. Rodriguez9c964772008-10-30 13:33:53 -0700797
798 freq_range1 = &rule1->freq_range;
799 freq_range2 = &rule2->freq_range;
800 freq_range = &intersected_rule->freq_range;
801
802 power_rule1 = &rule1->power_rule;
803 power_rule2 = &rule2->power_rule;
804 power_rule = &intersected_rule->power_rule;
805
806 freq_range->start_freq_khz = max(freq_range1->start_freq_khz,
Johannes Berg1a919312012-12-03 17:21:11 +0100807 freq_range2->start_freq_khz);
Luis R. Rodriguez9c964772008-10-30 13:33:53 -0700808 freq_range->end_freq_khz = min(freq_range1->end_freq_khz,
Johannes Berg1a919312012-12-03 17:21:11 +0100809 freq_range2->end_freq_khz);
Janusz Dziedzic97524822014-01-30 09:52:20 +0100810
811 max_bandwidth1 = freq_range1->max_bandwidth_khz;
812 max_bandwidth2 = freq_range2->max_bandwidth_khz;
813
Janusz Dziedzicb0dfd2e2014-02-20 13:52:16 +0100814 if (rule1->flags & NL80211_RRF_AUTO_BW)
815 max_bandwidth1 = reg_get_max_bandwidth(rd1, rule1);
816 if (rule2->flags & NL80211_RRF_AUTO_BW)
817 max_bandwidth2 = reg_get_max_bandwidth(rd2, rule2);
Janusz Dziedzic97524822014-01-30 09:52:20 +0100818
819 freq_range->max_bandwidth_khz = min(max_bandwidth1, max_bandwidth2);
Luis R. Rodriguez9c964772008-10-30 13:33:53 -0700820
Janusz Dziedzicb0dfd2e2014-02-20 13:52:16 +0100821 intersected_rule->flags = rule1->flags | rule2->flags;
822
823 /*
824 * In case NL80211_RRF_AUTO_BW requested for both rules
825 * set AUTO_BW in intersected rule also. Next we will
826 * calculate BW correctly in handle_channel function.
827 * In other case remove AUTO_BW flag while we calculate
828 * maximum bandwidth correctly and auto calculation is
829 * not required.
830 */
831 if ((rule1->flags & NL80211_RRF_AUTO_BW) &&
832 (rule2->flags & NL80211_RRF_AUTO_BW))
833 intersected_rule->flags |= NL80211_RRF_AUTO_BW;
834 else
835 intersected_rule->flags &= ~NL80211_RRF_AUTO_BW;
836
Luis R. Rodriguez9c964772008-10-30 13:33:53 -0700837 freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz;
838 if (freq_range->max_bandwidth_khz > freq_diff)
839 freq_range->max_bandwidth_khz = freq_diff;
840
841 power_rule->max_eirp = min(power_rule1->max_eirp,
842 power_rule2->max_eirp);
843 power_rule->max_antenna_gain = min(power_rule1->max_antenna_gain,
844 power_rule2->max_antenna_gain);
845
Janusz Dziedzic089027e2014-02-21 19:46:12 +0100846 intersected_rule->dfs_cac_ms = max(rule1->dfs_cac_ms,
847 rule2->dfs_cac_ms);
848
Luis R. Rodriguez9c964772008-10-30 13:33:53 -0700849 if (!is_valid_reg_rule(intersected_rule))
850 return -EINVAL;
851
852 return 0;
853}
854
Eliad Pellera62a1ae2014-09-03 15:25:03 +0300855/* check whether old rule contains new rule */
856static bool rule_contains(struct ieee80211_reg_rule *r1,
857 struct ieee80211_reg_rule *r2)
858{
859 /* for simplicity, currently consider only same flags */
860 if (r1->flags != r2->flags)
861 return false;
862
863 /* verify r1 is more restrictive */
864 if ((r1->power_rule.max_antenna_gain >
865 r2->power_rule.max_antenna_gain) ||
866 r1->power_rule.max_eirp > r2->power_rule.max_eirp)
867 return false;
868
869 /* make sure r2's range is contained within r1 */
870 if (r1->freq_range.start_freq_khz > r2->freq_range.start_freq_khz ||
871 r1->freq_range.end_freq_khz < r2->freq_range.end_freq_khz)
872 return false;
873
874 /* and finally verify that r1.max_bw >= r2.max_bw */
875 if (r1->freq_range.max_bandwidth_khz <
876 r2->freq_range.max_bandwidth_khz)
877 return false;
878
879 return true;
880}
881
882/* add or extend current rules. do nothing if rule is already contained */
883static void add_rule(struct ieee80211_reg_rule *rule,
884 struct ieee80211_reg_rule *reg_rules, u32 *n_rules)
885{
886 struct ieee80211_reg_rule *tmp_rule;
887 int i;
888
889 for (i = 0; i < *n_rules; i++) {
890 tmp_rule = &reg_rules[i];
891 /* rule is already contained - do nothing */
892 if (rule_contains(tmp_rule, rule))
893 return;
894
895 /* extend rule if possible */
896 if (rule_contains(rule, tmp_rule)) {
897 memcpy(tmp_rule, rule, sizeof(*rule));
898 return;
899 }
900 }
901
902 memcpy(&reg_rules[*n_rules], rule, sizeof(*rule));
903 (*n_rules)++;
904}
905
Luis R. Rodriguez9c964772008-10-30 13:33:53 -0700906/**
907 * regdom_intersect - do the intersection between two regulatory domains
908 * @rd1: first regulatory domain
909 * @rd2: second regulatory domain
910 *
911 * Use this function to get the intersection between two regulatory domains.
912 * Once completed we will mark the alpha2 for the rd as intersected, "98",
913 * as no one single alpha2 can represent this regulatory domain.
914 *
915 * Returns a pointer to the regulatory domain structure which will hold the
916 * resulting intersection of rules between rd1 and rd2. We will
917 * kzalloc() this structure for you.
918 */
Johannes Berg1a919312012-12-03 17:21:11 +0100919static struct ieee80211_regdomain *
920regdom_intersect(const struct ieee80211_regdomain *rd1,
921 const struct ieee80211_regdomain *rd2)
Luis R. Rodriguez9c964772008-10-30 13:33:53 -0700922{
923 int r, size_of_regd;
924 unsigned int x, y;
Eliad Pellera62a1ae2014-09-03 15:25:03 +0300925 unsigned int num_rules = 0;
Luis R. Rodriguez9c964772008-10-30 13:33:53 -0700926 const struct ieee80211_reg_rule *rule1, *rule2;
Eliad Pellera62a1ae2014-09-03 15:25:03 +0300927 struct ieee80211_reg_rule intersected_rule;
Luis R. Rodriguez9c964772008-10-30 13:33:53 -0700928 struct ieee80211_regdomain *rd;
Luis R. Rodriguez9c964772008-10-30 13:33:53 -0700929
930 if (!rd1 || !rd2)
931 return NULL;
932
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -0500933 /*
934 * First we get a count of the rules we'll need, then we actually
Luis R. Rodriguez9c964772008-10-30 13:33:53 -0700935 * build them. This is to so we can malloc() and free() a
936 * regdomain once. The reason we use reg_rules_intersect() here
937 * is it will return -EINVAL if the rule computed makes no sense.
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -0500938 * All rules that do check out OK are valid.
939 */
Luis R. Rodriguez9c964772008-10-30 13:33:53 -0700940
941 for (x = 0; x < rd1->n_reg_rules; x++) {
942 rule1 = &rd1->reg_rules[x];
943 for (y = 0; y < rd2->n_reg_rules; y++) {
944 rule2 = &rd2->reg_rules[y];
Janusz Dziedzic97524822014-01-30 09:52:20 +0100945 if (!reg_rules_intersect(rd1, rd2, rule1, rule2,
Eliad Pellera62a1ae2014-09-03 15:25:03 +0300946 &intersected_rule))
Luis R. Rodriguez9c964772008-10-30 13:33:53 -0700947 num_rules++;
Luis R. Rodriguez9c964772008-10-30 13:33:53 -0700948 }
949 }
950
951 if (!num_rules)
952 return NULL;
953
954 size_of_regd = sizeof(struct ieee80211_regdomain) +
Johannes Berg82f20852012-12-04 12:49:16 +0100955 num_rules * sizeof(struct ieee80211_reg_rule);
Luis R. Rodriguez9c964772008-10-30 13:33:53 -0700956
957 rd = kzalloc(size_of_regd, GFP_KERNEL);
958 if (!rd)
959 return NULL;
960
Eliad Pellera62a1ae2014-09-03 15:25:03 +0300961 for (x = 0; x < rd1->n_reg_rules; x++) {
Luis R. Rodriguez9c964772008-10-30 13:33:53 -0700962 rule1 = &rd1->reg_rules[x];
Eliad Pellera62a1ae2014-09-03 15:25:03 +0300963 for (y = 0; y < rd2->n_reg_rules; y++) {
Luis R. Rodriguez9c964772008-10-30 13:33:53 -0700964 rule2 = &rd2->reg_rules[y];
Janusz Dziedzic97524822014-01-30 09:52:20 +0100965 r = reg_rules_intersect(rd1, rd2, rule1, rule2,
Eliad Pellera62a1ae2014-09-03 15:25:03 +0300966 &intersected_rule);
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -0500967 /*
968 * No need to memset here the intersected rule here as
969 * we're not using the stack anymore
970 */
Luis R. Rodriguez9c964772008-10-30 13:33:53 -0700971 if (r)
972 continue;
Eliad Pellera62a1ae2014-09-03 15:25:03 +0300973
974 add_rule(&intersected_rule, rd->reg_rules,
975 &rd->n_reg_rules);
Luis R. Rodriguez9c964772008-10-30 13:33:53 -0700976 }
977 }
978
Luis R. Rodriguez9c964772008-10-30 13:33:53 -0700979 rd->alpha2[0] = '9';
980 rd->alpha2[1] = '8';
Luis R. Rodriguezadbfb052013-11-13 18:54:03 +0100981 rd->dfs_region = reg_intersect_dfs_region(rd1->dfs_region,
982 rd2->dfs_region);
Luis R. Rodriguez9c964772008-10-30 13:33:53 -0700983
984 return rd;
985}
986
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -0500987/*
988 * XXX: add support for the rest of enum nl80211_reg_rule_flags, we may
989 * want to just have the channel structure use these
990 */
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700991static u32 map_regdom_flags(u32 rd_flags)
992{
993 u32 channel_flags = 0;
Luis R. Rodriguez8fe02e12013-10-21 19:22:25 +0200994 if (rd_flags & NL80211_RRF_NO_IR_ALL)
995 channel_flags |= IEEE80211_CHAN_NO_IR;
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700996 if (rd_flags & NL80211_RRF_DFS)
997 channel_flags |= IEEE80211_CHAN_RADAR;
Seth Forshee03f6b082012-08-01 15:58:42 -0500998 if (rd_flags & NL80211_RRF_NO_OFDM)
999 channel_flags |= IEEE80211_CHAN_NO_OFDM;
David Spinadel570dbde2014-02-23 09:12:59 +02001000 if (rd_flags & NL80211_RRF_NO_OUTDOOR)
1001 channel_flags |= IEEE80211_CHAN_INDOOR_ONLY;
Arik Nemtsov06f207f2015-05-06 16:28:31 +03001002 if (rd_flags & NL80211_RRF_IR_CONCURRENT)
1003 channel_flags |= IEEE80211_CHAN_IR_CONCURRENT;
Arik Nemtsova6d4a532014-10-23 09:37:33 +03001004 if (rd_flags & NL80211_RRF_NO_HT40MINUS)
1005 channel_flags |= IEEE80211_CHAN_NO_HT40MINUS;
1006 if (rd_flags & NL80211_RRF_NO_HT40PLUS)
1007 channel_flags |= IEEE80211_CHAN_NO_HT40PLUS;
1008 if (rd_flags & NL80211_RRF_NO_80MHZ)
1009 channel_flags |= IEEE80211_CHAN_NO_80MHZ;
1010 if (rd_flags & NL80211_RRF_NO_160MHZ)
1011 channel_flags |= IEEE80211_CHAN_NO_160MHZ;
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07001012 return channel_flags;
1013}
1014
Johannes Berg361c9c82012-12-06 15:57:14 +01001015static const struct ieee80211_reg_rule *
1016freq_reg_info_regd(struct wiphy *wiphy, u32 center_freq,
Matthias May4edd5692015-07-17 15:28:39 +02001017 const struct ieee80211_regdomain *regd, u32 bw)
Johannes Berg8318d782008-01-24 19:38:38 +01001018{
1019 int i;
Luis R. Rodriguez0c7dc452009-01-07 17:43:36 -08001020 bool band_rule_found = false;
Luis R. Rodriguez038659e2009-05-02 00:37:17 -04001021 bool bw_fits = false;
1022
Luis R. Rodriguez3e0c3ff2009-01-07 17:43:34 -08001023 if (!regd)
Johannes Berg361c9c82012-12-06 15:57:14 +01001024 return ERR_PTR(-EINVAL);
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07001025
Luis R. Rodriguez3e0c3ff2009-01-07 17:43:34 -08001026 for (i = 0; i < regd->n_reg_rules; i++) {
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07001027 const struct ieee80211_reg_rule *rr;
1028 const struct ieee80211_freq_range *fr = NULL;
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07001029
Luis R. Rodriguez3e0c3ff2009-01-07 17:43:34 -08001030 rr = &regd->reg_rules[i];
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07001031 fr = &rr->freq_range;
Luis R. Rodriguez0c7dc452009-01-07 17:43:36 -08001032
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -05001033 /*
1034 * We only need to know if one frequency rule was
Luis R. Rodriguez0c7dc452009-01-07 17:43:36 -08001035 * was in center_freq's band, that's enough, so lets
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -05001036 * not overwrite it once found
1037 */
Luis R. Rodriguez0c7dc452009-01-07 17:43:36 -08001038 if (!band_rule_found)
1039 band_rule_found = freq_in_rule_band(fr, center_freq);
1040
Matthias May4edd5692015-07-17 15:28:39 +02001041 bw_fits = reg_does_bw_fit(fr, center_freq, bw);
Luis R. Rodriguez0c7dc452009-01-07 17:43:36 -08001042
Johannes Berg361c9c82012-12-06 15:57:14 +01001043 if (band_rule_found && bw_fits)
1044 return rr;
Johannes Berg8318d782008-01-24 19:38:38 +01001045 }
1046
Luis R. Rodriguez0c7dc452009-01-07 17:43:36 -08001047 if (!band_rule_found)
Johannes Berg361c9c82012-12-06 15:57:14 +01001048 return ERR_PTR(-ERANGE);
Luis R. Rodriguez0c7dc452009-01-07 17:43:36 -08001049
Johannes Berg361c9c82012-12-06 15:57:14 +01001050 return ERR_PTR(-EINVAL);
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07001051}
1052
Johannes Berg8de1c632015-08-21 14:13:06 +02001053static const struct ieee80211_reg_rule *
1054__freq_reg_info(struct wiphy *wiphy, u32 center_freq, u32 min_bw)
Matthias May4edd5692015-07-17 15:28:39 +02001055{
1056 const struct ieee80211_regdomain *regd = reg_get_regdomain(wiphy);
1057 const struct ieee80211_reg_rule *reg_rule = NULL;
1058 u32 bw;
1059
1060 for (bw = MHZ_TO_KHZ(20); bw >= min_bw; bw = bw / 2) {
1061 reg_rule = freq_reg_info_regd(wiphy, center_freq, regd, bw);
1062 if (!IS_ERR(reg_rule))
1063 return reg_rule;
1064 }
1065
1066 return reg_rule;
1067}
1068
Johannes Berg361c9c82012-12-06 15:57:14 +01001069const struct ieee80211_reg_rule *freq_reg_info(struct wiphy *wiphy,
1070 u32 center_freq)
Luis R. Rodriguez1fa25e42009-01-22 15:05:44 -08001071{
Matthias May4edd5692015-07-17 15:28:39 +02001072 return __freq_reg_info(wiphy, center_freq, MHZ_TO_KHZ(20));
Luis R. Rodriguez1fa25e42009-01-22 15:05:44 -08001073}
John W. Linville4f366c52010-07-15 14:57:33 -04001074EXPORT_SYMBOL(freq_reg_info);
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07001075
Luis R. Rodriguez034c6d62013-10-14 17:42:06 -07001076const char *reg_initiator_name(enum nl80211_reg_initiator initiator)
Luis R. Rodriguez926a0a02010-10-21 19:17:03 +05301077{
1078 switch (initiator) {
1079 case NL80211_REGDOM_SET_BY_CORE:
Luis R. Rodriguez034c6d62013-10-14 17:42:06 -07001080 return "core";
Luis R. Rodriguez926a0a02010-10-21 19:17:03 +05301081 case NL80211_REGDOM_SET_BY_USER:
Luis R. Rodriguez034c6d62013-10-14 17:42:06 -07001082 return "user";
Luis R. Rodriguez926a0a02010-10-21 19:17:03 +05301083 case NL80211_REGDOM_SET_BY_DRIVER:
Luis R. Rodriguez034c6d62013-10-14 17:42:06 -07001084 return "driver";
Luis R. Rodriguez926a0a02010-10-21 19:17:03 +05301085 case NL80211_REGDOM_SET_BY_COUNTRY_IE:
Luis R. Rodriguez034c6d62013-10-14 17:42:06 -07001086 return "country IE";
Luis R. Rodriguez926a0a02010-10-21 19:17:03 +05301087 default:
1088 WARN_ON(1);
Luis R. Rodriguez034c6d62013-10-14 17:42:06 -07001089 return "bug";
Luis R. Rodriguez926a0a02010-10-21 19:17:03 +05301090 }
1091}
Luis R. Rodriguez034c6d62013-10-14 17:42:06 -07001092EXPORT_SYMBOL(reg_initiator_name);
Luis R. Rodrigueze702d3c2010-10-21 19:17:04 +05301093
Luis R. Rodriguez034c6d62013-10-14 17:42:06 -07001094#ifdef CONFIG_CFG80211_REG_DEBUG
Janusz Dziedzicb0dfd2e2014-02-20 13:52:16 +01001095static void chan_reg_rule_print_dbg(const struct ieee80211_regdomain *regd,
1096 struct ieee80211_channel *chan,
Luis R. Rodrigueze702d3c2010-10-21 19:17:04 +05301097 const struct ieee80211_reg_rule *reg_rule)
1098{
1099 const struct ieee80211_power_rule *power_rule;
1100 const struct ieee80211_freq_range *freq_range;
Janusz Dziedzicb0dfd2e2014-02-20 13:52:16 +01001101 char max_antenna_gain[32], bw[32];
Luis R. Rodrigueze702d3c2010-10-21 19:17:04 +05301102
1103 power_rule = &reg_rule->power_rule;
1104 freq_range = &reg_rule->freq_range;
1105
1106 if (!power_rule->max_antenna_gain)
Janusz Dziedzicb0dfd2e2014-02-20 13:52:16 +01001107 snprintf(max_antenna_gain, sizeof(max_antenna_gain), "N/A");
Luis R. Rodrigueze702d3c2010-10-21 19:17:04 +05301108 else
Janusz Dziedzicb0dfd2e2014-02-20 13:52:16 +01001109 snprintf(max_antenna_gain, sizeof(max_antenna_gain), "%d",
1110 power_rule->max_antenna_gain);
1111
1112 if (reg_rule->flags & NL80211_RRF_AUTO_BW)
1113 snprintf(bw, sizeof(bw), "%d KHz, %d KHz AUTO",
1114 freq_range->max_bandwidth_khz,
1115 reg_get_max_bandwidth(regd, reg_rule));
1116 else
1117 snprintf(bw, sizeof(bw), "%d KHz",
1118 freq_range->max_bandwidth_khz);
Luis R. Rodrigueze702d3c2010-10-21 19:17:04 +05301119
Johannes Bergfe7ef5e2012-12-04 15:07:34 +01001120 REG_DBG_PRINT("Updating information on frequency %d MHz with regulatory rule:\n",
1121 chan->center_freq);
Luis R. Rodrigueze702d3c2010-10-21 19:17:04 +05301122
Janusz Dziedzicb0dfd2e2014-02-20 13:52:16 +01001123 REG_DBG_PRINT("%d KHz - %d KHz @ %s), (%s mBi, %d mBm)\n",
Johannes Berg1a919312012-12-03 17:21:11 +01001124 freq_range->start_freq_khz, freq_range->end_freq_khz,
Janusz Dziedzicb0dfd2e2014-02-20 13:52:16 +01001125 bw, max_antenna_gain,
Luis R. Rodrigueze702d3c2010-10-21 19:17:04 +05301126 power_rule->max_eirp);
1127}
1128#else
Janusz Dziedzicb0dfd2e2014-02-20 13:52:16 +01001129static void chan_reg_rule_print_dbg(const struct ieee80211_regdomain *regd,
1130 struct ieee80211_channel *chan,
Luis R. Rodrigueze702d3c2010-10-21 19:17:04 +05301131 const struct ieee80211_reg_rule *reg_rule)
1132{
1133 return;
1134}
Luis R. Rodriguez926a0a02010-10-21 19:17:03 +05301135#endif
1136
Johannes Berge33e2242014-06-23 11:06:16 +02001137/*
1138 * Note that right now we assume the desired channel bandwidth
1139 * is always 20 MHz for each individual channel (HT40 uses 20 MHz
1140 * per channel, the primary and the extension channel).
Luis R. Rodriguez038659e2009-05-02 00:37:17 -04001141 */
Luis R. Rodriguez7ca43d02010-10-20 10:18:53 -07001142static void handle_channel(struct wiphy *wiphy,
1143 enum nl80211_reg_initiator initiator,
Johannes Bergfdc9d7b2012-12-03 18:36:09 +01001144 struct ieee80211_channel *chan)
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07001145{
Luis R. Rodriguez038659e2009-05-02 00:37:17 -04001146 u32 flags, bw_flags = 0;
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07001147 const struct ieee80211_reg_rule *reg_rule = NULL;
1148 const struct ieee80211_power_rule *power_rule = NULL;
Luis R. Rodriguez038659e2009-05-02 00:37:17 -04001149 const struct ieee80211_freq_range *freq_range = NULL;
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05001150 struct wiphy *request_wiphy = NULL;
Johannes Bergc492db32012-12-06 16:29:25 +01001151 struct regulatory_request *lr = get_last_request();
Janusz Dziedzic97524822014-01-30 09:52:20 +01001152 const struct ieee80211_regdomain *regd;
1153 u32 max_bandwidth_khz;
Luis R. Rodrigueza92a3ce2009-01-07 17:43:33 -08001154
Johannes Bergc492db32012-12-06 16:29:25 +01001155 request_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx);
Luis R. Rodrigueza92a3ce2009-01-07 17:43:33 -08001156
1157 flags = chan->orig_flags;
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07001158
Johannes Berg361c9c82012-12-06 15:57:14 +01001159 reg_rule = freq_reg_info(wiphy, MHZ_TO_KHZ(chan->center_freq));
1160 if (IS_ERR(reg_rule)) {
Luis R. Rodriguezca4ffe82010-10-20 10:18:55 -07001161 /*
1162 * We will disable all channels that do not match our
Lucas De Marchi25985ed2011-03-30 22:57:33 -03001163 * received regulatory rule unless the hint is coming
Luis R. Rodriguezca4ffe82010-10-20 10:18:55 -07001164 * from a Country IE and the Country IE had no information
1165 * about a band. The IEEE 802.11 spec allows for an AP
1166 * to send only a subset of the regulatory rules allowed,
1167 * so an AP in the US that only supports 2.4 GHz may only send
1168 * a country IE with information for the 2.4 GHz band
1169 * while 5 GHz is still supported.
1170 */
1171 if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE &&
Johannes Berg361c9c82012-12-06 15:57:14 +01001172 PTR_ERR(reg_rule) == -ERANGE)
Luis R. Rodriguezca4ffe82010-10-20 10:18:55 -07001173 return;
1174
Luis R. Rodriguezcc493e4f2013-11-06 17:54:44 +01001175 if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER &&
1176 request_wiphy && request_wiphy == wiphy &&
Luis R. Rodrigueza2f73b62013-11-11 22:15:29 +01001177 request_wiphy->regulatory_flags & REGULATORY_STRICT_REG) {
Luis R. Rodriguezcc493e4f2013-11-06 17:54:44 +01001178 REG_DBG_PRINT("Disabling freq %d MHz for good\n",
1179 chan->center_freq);
1180 chan->orig_flags |= IEEE80211_CHAN_DISABLED;
1181 chan->flags = chan->orig_flags;
1182 } else {
1183 REG_DBG_PRINT("Disabling freq %d MHz\n",
1184 chan->center_freq);
1185 chan->flags |= IEEE80211_CHAN_DISABLED;
1186 }
Johannes Berg8318d782008-01-24 19:38:38 +01001187 return;
Luis R. Rodriguezca4ffe82010-10-20 10:18:55 -07001188 }
Johannes Berg8318d782008-01-24 19:38:38 +01001189
Janusz Dziedzicb0dfd2e2014-02-20 13:52:16 +01001190 regd = reg_get_regdomain(wiphy);
1191 chan_reg_rule_print_dbg(regd, chan, reg_rule);
Luis R. Rodrigueze702d3c2010-10-21 19:17:04 +05301192
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07001193 power_rule = &reg_rule->power_rule;
Luis R. Rodriguez038659e2009-05-02 00:37:17 -04001194 freq_range = &reg_rule->freq_range;
1195
Janusz Dziedzic97524822014-01-30 09:52:20 +01001196 max_bandwidth_khz = freq_range->max_bandwidth_khz;
1197 /* Check if auto calculation requested */
Janusz Dziedzicb0dfd2e2014-02-20 13:52:16 +01001198 if (reg_rule->flags & NL80211_RRF_AUTO_BW)
Janusz Dziedzic97524822014-01-30 09:52:20 +01001199 max_bandwidth_khz = reg_get_max_bandwidth(regd, reg_rule);
Janusz Dziedzic97524822014-01-30 09:52:20 +01001200
Matthias May4edd5692015-07-17 15:28:39 +02001201 /* If we get a reg_rule we can assume that at least 5Mhz fit */
1202 if (!reg_does_bw_fit(freq_range, MHZ_TO_KHZ(chan->center_freq),
1203 MHZ_TO_KHZ(10)))
1204 bw_flags |= IEEE80211_CHAN_NO_10MHZ;
1205 if (!reg_does_bw_fit(freq_range, MHZ_TO_KHZ(chan->center_freq),
1206 MHZ_TO_KHZ(20)))
1207 bw_flags |= IEEE80211_CHAN_NO_20MHZ;
1208
1209 if (max_bandwidth_khz < MHZ_TO_KHZ(10))
1210 bw_flags |= IEEE80211_CHAN_NO_10MHZ;
1211 if (max_bandwidth_khz < MHZ_TO_KHZ(20))
1212 bw_flags |= IEEE80211_CHAN_NO_20MHZ;
Janusz Dziedzic97524822014-01-30 09:52:20 +01001213 if (max_bandwidth_khz < MHZ_TO_KHZ(40))
Matthias May4edd5692015-07-17 15:28:39 +02001214 bw_flags |= IEEE80211_CHAN_NO_HT40;
Janusz Dziedzic97524822014-01-30 09:52:20 +01001215 if (max_bandwidth_khz < MHZ_TO_KHZ(80))
Johannes Bergc7a6ee22012-12-12 17:50:39 +01001216 bw_flags |= IEEE80211_CHAN_NO_80MHZ;
Janusz Dziedzic97524822014-01-30 09:52:20 +01001217 if (max_bandwidth_khz < MHZ_TO_KHZ(160))
Johannes Bergc7a6ee22012-12-12 17:50:39 +01001218 bw_flags |= IEEE80211_CHAN_NO_160MHZ;
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07001219
Johannes Bergc492db32012-12-06 16:29:25 +01001220 if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER &&
Luis R. Rodriguez806a9e32009-02-21 00:04:26 -05001221 request_wiphy && request_wiphy == wiphy &&
Luis R. Rodrigueza2f73b62013-11-11 22:15:29 +01001222 request_wiphy->regulatory_flags & REGULATORY_STRICT_REG) {
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -05001223 /*
Lucas De Marchi25985ed2011-03-30 22:57:33 -03001224 * This guarantees the driver's requested regulatory domain
Luis R. Rodriguezf9763762009-01-22 15:05:52 -08001225 * will always be used as a base for further regulatory
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -05001226 * settings
1227 */
Luis R. Rodriguezf9763762009-01-22 15:05:52 -08001228 chan->flags = chan->orig_flags =
Luis R. Rodriguez038659e2009-05-02 00:37:17 -04001229 map_regdom_flags(reg_rule->flags) | bw_flags;
Luis R. Rodriguezf9763762009-01-22 15:05:52 -08001230 chan->max_antenna_gain = chan->orig_mag =
1231 (int) MBI_TO_DBI(power_rule->max_antenna_gain);
Felix Fietkau279f0f52012-10-17 13:56:20 +02001232 chan->max_reg_power = chan->max_power = chan->orig_mpwr =
Luis R. Rodriguezf9763762009-01-22 15:05:52 -08001233 (int) MBM_TO_DBM(power_rule->max_eirp);
Janusz Dziedzic4f267c12014-04-09 13:47:12 +02001234
1235 if (chan->flags & IEEE80211_CHAN_RADAR) {
1236 chan->dfs_cac_ms = IEEE80211_DFS_MIN_CAC_TIME_MS;
1237 if (reg_rule->dfs_cac_ms)
1238 chan->dfs_cac_ms = reg_rule->dfs_cac_ms;
1239 }
1240
Luis R. Rodriguezf9763762009-01-22 15:05:52 -08001241 return;
1242 }
1243
Simon Wunderlich04f39042013-02-08 18:16:19 +01001244 chan->dfs_state = NL80211_DFS_USABLE;
1245 chan->dfs_state_entered = jiffies;
1246
Rajkumar Manoharanaa3d7ee2011-09-14 14:28:17 +05301247 chan->beacon_found = false;
Luis R. Rodriguez038659e2009-05-02 00:37:17 -04001248 chan->flags = flags | bw_flags | map_regdom_flags(reg_rule->flags);
Johannes Berg1a919312012-12-03 17:21:11 +01001249 chan->max_antenna_gain =
1250 min_t(int, chan->orig_mag,
1251 MBI_TO_DBI(power_rule->max_antenna_gain));
Hong Wueccc0682012-01-11 20:33:39 +02001252 chan->max_reg_power = (int) MBM_TO_DBM(power_rule->max_eirp);
Janusz Dziedzic089027e2014-02-21 19:46:12 +01001253
1254 if (chan->flags & IEEE80211_CHAN_RADAR) {
1255 if (reg_rule->dfs_cac_ms)
1256 chan->dfs_cac_ms = reg_rule->dfs_cac_ms;
1257 else
1258 chan->dfs_cac_ms = IEEE80211_DFS_MIN_CAC_TIME_MS;
1259 }
1260
Stanislaw Gruszka5e31fc02012-07-24 08:35:39 +02001261 if (chan->orig_mpwr) {
1262 /*
Luis R. Rodrigueza09a85a2013-11-11 22:15:30 +01001263 * Devices that use REGULATORY_COUNTRY_IE_FOLLOW_POWER
1264 * will always follow the passed country IE power settings.
Stanislaw Gruszka5e31fc02012-07-24 08:35:39 +02001265 */
1266 if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE &&
Luis R. Rodrigueza09a85a2013-11-11 22:15:30 +01001267 wiphy->regulatory_flags & REGULATORY_COUNTRY_IE_FOLLOW_POWER)
Stanislaw Gruszka5e31fc02012-07-24 08:35:39 +02001268 chan->max_power = chan->max_reg_power;
1269 else
1270 chan->max_power = min(chan->orig_mpwr,
1271 chan->max_reg_power);
1272 } else
1273 chan->max_power = chan->max_reg_power;
Johannes Berg8318d782008-01-24 19:38:38 +01001274}
1275
Luis R. Rodriguez7ca43d02010-10-20 10:18:53 -07001276static void handle_band(struct wiphy *wiphy,
Johannes Bergfdc9d7b2012-12-03 18:36:09 +01001277 enum nl80211_reg_initiator initiator,
1278 struct ieee80211_supported_band *sband)
Johannes Berg8318d782008-01-24 19:38:38 +01001279{
Luis R. Rodrigueza92a3ce2009-01-07 17:43:33 -08001280 unsigned int i;
Luis R. Rodrigueza92a3ce2009-01-07 17:43:33 -08001281
Johannes Bergfdc9d7b2012-12-03 18:36:09 +01001282 if (!sband)
1283 return;
Johannes Berg8318d782008-01-24 19:38:38 +01001284
1285 for (i = 0; i < sband->n_channels; i++)
Johannes Bergfdc9d7b2012-12-03 18:36:09 +01001286 handle_channel(wiphy, initiator, &sband->channels[i]);
Johannes Berg8318d782008-01-24 19:38:38 +01001287}
1288
Luis R. Rodriguez57b5ce02012-07-12 11:49:18 -07001289static bool reg_request_cell_base(struct regulatory_request *request)
1290{
1291 if (request->initiator != NL80211_REGDOM_SET_BY_USER)
1292 return false;
Johannes Berg1a919312012-12-03 17:21:11 +01001293 return request->user_reg_hint_type == NL80211_USER_REG_HINT_CELL_BASE;
Luis R. Rodriguez57b5ce02012-07-12 11:49:18 -07001294}
1295
1296bool reg_last_request_cell_base(void)
1297{
Johannes Berg38fd2142013-05-10 19:17:17 +02001298 return reg_request_cell_base(get_last_request());
Luis R. Rodriguez57b5ce02012-07-12 11:49:18 -07001299}
1300
Ilan Peer94fc6612014-02-23 09:13:00 +02001301#ifdef CONFIG_CFG80211_REG_CELLULAR_HINTS
Luis R. Rodriguez57b5ce02012-07-12 11:49:18 -07001302/* Core specific check */
Johannes Berg2f922122012-12-03 17:54:55 +01001303static enum reg_request_treatment
1304reg_ignore_cell_hint(struct regulatory_request *pending_request)
Luis R. Rodriguez57b5ce02012-07-12 11:49:18 -07001305{
Johannes Bergc492db32012-12-06 16:29:25 +01001306 struct regulatory_request *lr = get_last_request();
Luis R. Rodriguez57b5ce02012-07-12 11:49:18 -07001307
Luis R. Rodriguez57b5ce02012-07-12 11:49:18 -07001308 if (!reg_num_devs_support_basehint)
Johannes Berg2f922122012-12-03 17:54:55 +01001309 return REG_REQ_IGNORE;
Luis R. Rodriguez57b5ce02012-07-12 11:49:18 -07001310
Johannes Bergc492db32012-12-06 16:29:25 +01001311 if (reg_request_cell_base(lr) &&
Johannes Berg1a919312012-12-03 17:21:11 +01001312 !regdom_changes(pending_request->alpha2))
Johannes Berg2f922122012-12-03 17:54:55 +01001313 return REG_REQ_ALREADY_SET;
Johannes Berg1a919312012-12-03 17:21:11 +01001314
Johannes Berg2f922122012-12-03 17:54:55 +01001315 return REG_REQ_OK;
Luis R. Rodriguez57b5ce02012-07-12 11:49:18 -07001316}
1317
1318/* Device specific check */
1319static bool reg_dev_ignore_cell_hint(struct wiphy *wiphy)
1320{
Johannes Berg1a919312012-12-03 17:21:11 +01001321 return !(wiphy->features & NL80211_FEATURE_CELL_BASE_REG_HINTS);
Luis R. Rodriguez57b5ce02012-07-12 11:49:18 -07001322}
1323#else
1324static int reg_ignore_cell_hint(struct regulatory_request *pending_request)
1325{
Johannes Berg2f922122012-12-03 17:54:55 +01001326 return REG_REQ_IGNORE;
Luis R. Rodriguez57b5ce02012-07-12 11:49:18 -07001327}
Johannes Berg1a919312012-12-03 17:21:11 +01001328
1329static bool reg_dev_ignore_cell_hint(struct wiphy *wiphy)
Luis R. Rodriguez57b5ce02012-07-12 11:49:18 -07001330{
1331 return true;
1332}
1333#endif
1334
Luis R. Rodriguezfa1fb9c2013-10-02 18:33:10 -07001335static bool wiphy_strict_alpha2_regd(struct wiphy *wiphy)
1336{
Luis R. Rodrigueza2f73b62013-11-11 22:15:29 +01001337 if (wiphy->regulatory_flags & REGULATORY_STRICT_REG &&
1338 !(wiphy->regulatory_flags & REGULATORY_CUSTOM_REG))
Luis R. Rodriguezfa1fb9c2013-10-02 18:33:10 -07001339 return true;
1340 return false;
1341}
Luis R. Rodriguez57b5ce02012-07-12 11:49:18 -07001342
Luis R. Rodriguez7db90f42009-03-09 22:07:41 -04001343static bool ignore_reg_update(struct wiphy *wiphy,
1344 enum nl80211_reg_initiator initiator)
Luis R. Rodriguez14b98152008-11-12 14:22:03 -08001345{
Johannes Bergc492db32012-12-06 16:29:25 +01001346 struct regulatory_request *lr = get_last_request();
1347
Jonathan Doronb0d7aa52014-12-15 19:26:00 +02001348 if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED)
1349 return true;
1350
Johannes Bergc492db32012-12-06 16:29:25 +01001351 if (!lr) {
Luis R. Rodriguez034c6d62013-10-14 17:42:06 -07001352 REG_DBG_PRINT("Ignoring regulatory request set by %s "
1353 "since last_request is not set\n",
Luis R. Rodriguez926a0a02010-10-21 19:17:03 +05301354 reg_initiator_name(initiator));
Luis R. Rodriguez14b98152008-11-12 14:22:03 -08001355 return true;
Luis R. Rodriguez926a0a02010-10-21 19:17:03 +05301356 }
1357
Luis R. Rodriguez7db90f42009-03-09 22:07:41 -04001358 if (initiator == NL80211_REGDOM_SET_BY_CORE &&
Luis R. Rodrigueza2f73b62013-11-11 22:15:29 +01001359 wiphy->regulatory_flags & REGULATORY_CUSTOM_REG) {
Luis R. Rodriguez034c6d62013-10-14 17:42:06 -07001360 REG_DBG_PRINT("Ignoring regulatory request set by %s "
1361 "since the driver uses its own custom "
1362 "regulatory domain\n",
Luis R. Rodriguez926a0a02010-10-21 19:17:03 +05301363 reg_initiator_name(initiator));
Luis R. Rodriguez14b98152008-11-12 14:22:03 -08001364 return true;
Luis R. Rodriguez926a0a02010-10-21 19:17:03 +05301365 }
1366
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -05001367 /*
1368 * wiphy->regd will be set once the device has its own
1369 * desired regulatory domain set
1370 */
Luis R. Rodriguezfa1fb9c2013-10-02 18:33:10 -07001371 if (wiphy_strict_alpha2_regd(wiphy) && !wiphy->regd &&
Luis R. Rodriguez749b5272010-10-20 10:18:54 -07001372 initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE &&
Johannes Bergc492db32012-12-06 16:29:25 +01001373 !is_world_regdom(lr->alpha2)) {
Luis R. Rodriguez034c6d62013-10-14 17:42:06 -07001374 REG_DBG_PRINT("Ignoring regulatory request set by %s "
1375 "since the driver requires its own regulatory "
1376 "domain to be set first\n",
Luis R. Rodriguez926a0a02010-10-21 19:17:03 +05301377 reg_initiator_name(initiator));
Luis R. Rodriguez14b98152008-11-12 14:22:03 -08001378 return true;
Luis R. Rodriguez926a0a02010-10-21 19:17:03 +05301379 }
1380
Johannes Bergc492db32012-12-06 16:29:25 +01001381 if (reg_request_cell_base(lr))
Luis R. Rodriguez57b5ce02012-07-12 11:49:18 -07001382 return reg_dev_ignore_cell_hint(wiphy);
1383
Luis R. Rodriguez14b98152008-11-12 14:22:03 -08001384 return false;
1385}
1386
Luis R. Rodriguez3195e482012-12-19 10:53:03 -08001387static bool reg_is_world_roaming(struct wiphy *wiphy)
1388{
1389 const struct ieee80211_regdomain *cr = get_cfg80211_regdom();
1390 const struct ieee80211_regdomain *wr = get_wiphy_regdom(wiphy);
1391 struct regulatory_request *lr = get_last_request();
1392
1393 if (is_world_regdom(cr->alpha2) || (wr && is_world_regdom(wr->alpha2)))
1394 return true;
1395
1396 if (lr && lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE &&
Luis R. Rodrigueza2f73b62013-11-11 22:15:29 +01001397 wiphy->regulatory_flags & REGULATORY_CUSTOM_REG)
Luis R. Rodriguez3195e482012-12-19 10:53:03 -08001398 return true;
1399
1400 return false;
1401}
1402
Johannes Berg1a919312012-12-03 17:21:11 +01001403static void handle_reg_beacon(struct wiphy *wiphy, unsigned int chan_idx,
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05001404 struct reg_beacon *reg_beacon)
1405{
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05001406 struct ieee80211_supported_band *sband;
1407 struct ieee80211_channel *chan;
Luis R. Rodriguez6bad8762009-04-02 14:08:09 -04001408 bool channel_changed = false;
1409 struct ieee80211_channel chan_before;
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05001410
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05001411 sband = wiphy->bands[reg_beacon->chan.band];
1412 chan = &sband->channels[chan_idx];
1413
1414 if (likely(chan->center_freq != reg_beacon->chan.center_freq))
1415 return;
1416
Luis R. Rodriguez6bad8762009-04-02 14:08:09 -04001417 if (chan->beacon_found)
1418 return;
1419
1420 chan->beacon_found = true;
1421
Luis R. Rodriguez0f500a52012-12-19 10:53:04 -08001422 if (!reg_is_world_roaming(wiphy))
1423 return;
1424
Luis R. Rodrigueza2f73b62013-11-11 22:15:29 +01001425 if (wiphy->regulatory_flags & REGULATORY_DISABLE_BEACON_HINTS)
Luis R. Rodriguez37184242009-07-30 17:43:48 -07001426 return;
1427
Luis R. Rodriguez6bad8762009-04-02 14:08:09 -04001428 chan_before.center_freq = chan->center_freq;
1429 chan_before.flags = chan->flags;
1430
Luis R. Rodriguez8fe02e12013-10-21 19:22:25 +02001431 if (chan->flags & IEEE80211_CHAN_NO_IR) {
1432 chan->flags &= ~IEEE80211_CHAN_NO_IR;
Luis R. Rodriguez6bad8762009-04-02 14:08:09 -04001433 channel_changed = true;
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05001434 }
1435
Luis R. Rodriguez6bad8762009-04-02 14:08:09 -04001436 if (channel_changed)
1437 nl80211_send_beacon_hint_event(wiphy, &chan_before, chan);
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05001438}
1439
1440/*
1441 * Called when a scan on a wiphy finds a beacon on
1442 * new channel
1443 */
1444static void wiphy_update_new_beacon(struct wiphy *wiphy,
1445 struct reg_beacon *reg_beacon)
1446{
1447 unsigned int i;
1448 struct ieee80211_supported_band *sband;
1449
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05001450 if (!wiphy->bands[reg_beacon->chan.band])
1451 return;
1452
1453 sband = wiphy->bands[reg_beacon->chan.band];
1454
1455 for (i = 0; i < sband->n_channels; i++)
1456 handle_reg_beacon(wiphy, i, reg_beacon);
1457}
1458
1459/*
1460 * Called upon reg changes or a new wiphy is added
1461 */
1462static void wiphy_update_beacon_reg(struct wiphy *wiphy)
1463{
1464 unsigned int i;
1465 struct ieee80211_supported_band *sband;
1466 struct reg_beacon *reg_beacon;
1467
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05001468 list_for_each_entry(reg_beacon, &reg_beacon_list, list) {
1469 if (!wiphy->bands[reg_beacon->chan.band])
1470 continue;
1471 sband = wiphy->bands[reg_beacon->chan.band];
1472 for (i = 0; i < sband->n_channels; i++)
1473 handle_reg_beacon(wiphy, i, reg_beacon);
1474 }
1475}
1476
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05001477/* Reap the advantages of previously found beacons */
1478static void reg_process_beacons(struct wiphy *wiphy)
1479{
Luis R. Rodriguezb1ed8dd2009-05-02 00:34:15 -04001480 /*
1481 * Means we are just firing up cfg80211, so no beacons would
1482 * have been processed yet.
1483 */
1484 if (!last_request)
1485 return;
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05001486 wiphy_update_beacon_reg(wiphy);
1487}
1488
Johannes Berg1a919312012-12-03 17:21:11 +01001489static bool is_ht40_allowed(struct ieee80211_channel *chan)
Luis R. Rodriguez038659e2009-05-02 00:37:17 -04001490{
1491 if (!chan)
Johannes Berg1a919312012-12-03 17:21:11 +01001492 return false;
Luis R. Rodriguez038659e2009-05-02 00:37:17 -04001493 if (chan->flags & IEEE80211_CHAN_DISABLED)
Johannes Berg1a919312012-12-03 17:21:11 +01001494 return false;
Luis R. Rodriguez038659e2009-05-02 00:37:17 -04001495 /* This would happen when regulatory rules disallow HT40 completely */
Felix Fietkau55b183a2013-01-11 14:22:58 +01001496 if ((chan->flags & IEEE80211_CHAN_NO_HT40) == IEEE80211_CHAN_NO_HT40)
1497 return false;
1498 return true;
Luis R. Rodriguez038659e2009-05-02 00:37:17 -04001499}
1500
1501static void reg_process_ht_flags_channel(struct wiphy *wiphy,
Johannes Bergfdc9d7b2012-12-03 18:36:09 +01001502 struct ieee80211_channel *channel)
Luis R. Rodriguez038659e2009-05-02 00:37:17 -04001503{
Johannes Bergfdc9d7b2012-12-03 18:36:09 +01001504 struct ieee80211_supported_band *sband = wiphy->bands[channel->band];
Luis R. Rodriguez038659e2009-05-02 00:37:17 -04001505 struct ieee80211_channel *channel_before = NULL, *channel_after = NULL;
1506 unsigned int i;
1507
Johannes Berg1a919312012-12-03 17:21:11 +01001508 if (!is_ht40_allowed(channel)) {
Luis R. Rodriguez038659e2009-05-02 00:37:17 -04001509 channel->flags |= IEEE80211_CHAN_NO_HT40;
1510 return;
1511 }
1512
1513 /*
1514 * We need to ensure the extension channels exist to
1515 * be able to use HT40- or HT40+, this finds them (or not)
1516 */
1517 for (i = 0; i < sband->n_channels; i++) {
1518 struct ieee80211_channel *c = &sband->channels[i];
Johannes Berg1a919312012-12-03 17:21:11 +01001519
Luis R. Rodriguez038659e2009-05-02 00:37:17 -04001520 if (c->center_freq == (channel->center_freq - 20))
1521 channel_before = c;
1522 if (c->center_freq == (channel->center_freq + 20))
1523 channel_after = c;
1524 }
1525
1526 /*
1527 * Please note that this assumes target bandwidth is 20 MHz,
1528 * if that ever changes we also need to change the below logic
1529 * to include that as well.
1530 */
Johannes Berg1a919312012-12-03 17:21:11 +01001531 if (!is_ht40_allowed(channel_before))
Luis R. Rodriguez689da1b2009-05-02 00:37:18 -04001532 channel->flags |= IEEE80211_CHAN_NO_HT40MINUS;
Luis R. Rodriguez038659e2009-05-02 00:37:17 -04001533 else
Luis R. Rodriguez689da1b2009-05-02 00:37:18 -04001534 channel->flags &= ~IEEE80211_CHAN_NO_HT40MINUS;
Luis R. Rodriguez038659e2009-05-02 00:37:17 -04001535
Johannes Berg1a919312012-12-03 17:21:11 +01001536 if (!is_ht40_allowed(channel_after))
Luis R. Rodriguez689da1b2009-05-02 00:37:18 -04001537 channel->flags |= IEEE80211_CHAN_NO_HT40PLUS;
Luis R. Rodriguez038659e2009-05-02 00:37:17 -04001538 else
Luis R. Rodriguez689da1b2009-05-02 00:37:18 -04001539 channel->flags &= ~IEEE80211_CHAN_NO_HT40PLUS;
Luis R. Rodriguez038659e2009-05-02 00:37:17 -04001540}
1541
1542static void reg_process_ht_flags_band(struct wiphy *wiphy,
Johannes Bergfdc9d7b2012-12-03 18:36:09 +01001543 struct ieee80211_supported_band *sband)
Luis R. Rodriguez038659e2009-05-02 00:37:17 -04001544{
1545 unsigned int i;
Luis R. Rodriguez038659e2009-05-02 00:37:17 -04001546
Johannes Bergfdc9d7b2012-12-03 18:36:09 +01001547 if (!sband)
1548 return;
Luis R. Rodriguez038659e2009-05-02 00:37:17 -04001549
1550 for (i = 0; i < sband->n_channels; i++)
Johannes Bergfdc9d7b2012-12-03 18:36:09 +01001551 reg_process_ht_flags_channel(wiphy, &sband->channels[i]);
Luis R. Rodriguez038659e2009-05-02 00:37:17 -04001552}
1553
1554static void reg_process_ht_flags(struct wiphy *wiphy)
1555{
1556 enum ieee80211_band band;
1557
1558 if (!wiphy)
1559 return;
1560
Johannes Bergfdc9d7b2012-12-03 18:36:09 +01001561 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
1562 reg_process_ht_flags_band(wiphy, wiphy->bands[band]);
Luis R. Rodriguez038659e2009-05-02 00:37:17 -04001563}
1564
Luis R. Rodriguez0e3802d2013-11-05 09:18:12 -08001565static void reg_call_notifier(struct wiphy *wiphy,
1566 struct regulatory_request *request)
1567{
1568 if (wiphy->reg_notifier)
1569 wiphy->reg_notifier(wiphy, request);
1570}
1571
Arik Nemtsovad932f02014-11-27 09:44:55 +02001572static bool reg_wdev_chan_valid(struct wiphy *wiphy, struct wireless_dev *wdev)
1573{
Arik Nemtsovad932f02014-11-27 09:44:55 +02001574 struct cfg80211_chan_def chandef;
1575 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
Arik Nemtsov20658702014-12-29 11:59:59 +02001576 enum nl80211_iftype iftype;
Arik Nemtsovad932f02014-11-27 09:44:55 +02001577
1578 wdev_lock(wdev);
Arik Nemtsov20658702014-12-29 11:59:59 +02001579 iftype = wdev->iftype;
Arik Nemtsovad932f02014-11-27 09:44:55 +02001580
Arik Nemtsov20658702014-12-29 11:59:59 +02001581 /* make sure the interface is active */
Arik Nemtsovad932f02014-11-27 09:44:55 +02001582 if (!wdev->netdev || !netif_running(wdev->netdev))
Arik Nemtsov20658702014-12-29 11:59:59 +02001583 goto wdev_inactive_unlock;
Arik Nemtsovad932f02014-11-27 09:44:55 +02001584
Arik Nemtsov20658702014-12-29 11:59:59 +02001585 switch (iftype) {
Arik Nemtsovad932f02014-11-27 09:44:55 +02001586 case NL80211_IFTYPE_AP:
1587 case NL80211_IFTYPE_P2P_GO:
1588 if (!wdev->beacon_interval)
Arik Nemtsov20658702014-12-29 11:59:59 +02001589 goto wdev_inactive_unlock;
1590 chandef = wdev->chandef;
Arik Nemtsovad932f02014-11-27 09:44:55 +02001591 break;
Arik Nemtsov185076d2014-12-03 18:08:17 +02001592 case NL80211_IFTYPE_ADHOC:
1593 if (!wdev->ssid_len)
Arik Nemtsov20658702014-12-29 11:59:59 +02001594 goto wdev_inactive_unlock;
1595 chandef = wdev->chandef;
Arik Nemtsov185076d2014-12-03 18:08:17 +02001596 break;
Arik Nemtsovad932f02014-11-27 09:44:55 +02001597 case NL80211_IFTYPE_STATION:
1598 case NL80211_IFTYPE_P2P_CLIENT:
Arik Nemtsovad932f02014-11-27 09:44:55 +02001599 if (!wdev->current_bss ||
1600 !wdev->current_bss->pub.channel)
Arik Nemtsov20658702014-12-29 11:59:59 +02001601 goto wdev_inactive_unlock;
Arik Nemtsovad932f02014-11-27 09:44:55 +02001602
Arik Nemtsov20658702014-12-29 11:59:59 +02001603 if (!rdev->ops->get_channel ||
1604 rdev_get_channel(rdev, wdev, &chandef))
1605 cfg80211_chandef_create(&chandef,
1606 wdev->current_bss->pub.channel,
1607 NL80211_CHAN_NO_HT);
Arik Nemtsovad932f02014-11-27 09:44:55 +02001608 break;
1609 case NL80211_IFTYPE_MONITOR:
1610 case NL80211_IFTYPE_AP_VLAN:
1611 case NL80211_IFTYPE_P2P_DEVICE:
1612 /* no enforcement required */
1613 break;
1614 default:
1615 /* others not implemented for now */
1616 WARN_ON(1);
1617 break;
1618 }
1619
Arik Nemtsovad932f02014-11-27 09:44:55 +02001620 wdev_unlock(wdev);
Arik Nemtsov20658702014-12-29 11:59:59 +02001621
1622 switch (iftype) {
1623 case NL80211_IFTYPE_AP:
1624 case NL80211_IFTYPE_P2P_GO:
1625 case NL80211_IFTYPE_ADHOC:
Arik Nemtsov923b3522015-07-08 15:41:44 +03001626 return cfg80211_reg_can_beacon_relax(wiphy, &chandef, iftype);
Arik Nemtsov20658702014-12-29 11:59:59 +02001627 case NL80211_IFTYPE_STATION:
1628 case NL80211_IFTYPE_P2P_CLIENT:
1629 return cfg80211_chandef_usable(wiphy, &chandef,
1630 IEEE80211_CHAN_DISABLED);
1631 default:
1632 break;
1633 }
1634
1635 return true;
1636
1637wdev_inactive_unlock:
1638 wdev_unlock(wdev);
1639 return true;
Arik Nemtsovad932f02014-11-27 09:44:55 +02001640}
1641
1642static void reg_leave_invalid_chans(struct wiphy *wiphy)
1643{
1644 struct wireless_dev *wdev;
1645 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
1646
1647 ASSERT_RTNL();
1648
1649 list_for_each_entry(wdev, &rdev->wdev_list, list)
1650 if (!reg_wdev_chan_valid(wiphy, wdev))
1651 cfg80211_leave(rdev, wdev);
1652}
1653
1654static void reg_check_chans_work(struct work_struct *work)
1655{
1656 struct cfg80211_registered_device *rdev;
1657
1658 REG_DBG_PRINT("Verifying active interfaces after reg change\n");
1659 rtnl_lock();
1660
1661 list_for_each_entry(rdev, &cfg80211_rdev_list, list)
1662 if (!(rdev->wiphy.regulatory_flags &
1663 REGULATORY_IGNORE_STALE_KICKOFF))
1664 reg_leave_invalid_chans(&rdev->wiphy);
1665
1666 rtnl_unlock();
1667}
1668
1669static void reg_check_channels(void)
1670{
1671 /*
1672 * Give usermode a chance to do something nicer (move to another
1673 * channel, orderly disconnection), before forcing a disconnection.
1674 */
1675 mod_delayed_work(system_power_efficient_wq,
1676 &reg_check_chans,
1677 msecs_to_jiffies(REG_ENFORCE_GRACE_MS));
1678}
1679
Sven Neumanneac03e32011-08-30 23:38:53 +02001680static void wiphy_update_regulatory(struct wiphy *wiphy,
1681 enum nl80211_reg_initiator initiator)
Johannes Berg8318d782008-01-24 19:38:38 +01001682{
1683 enum ieee80211_band band;
Johannes Bergc492db32012-12-06 16:29:25 +01001684 struct regulatory_request *lr = get_last_request();
Sven Neumanneac03e32011-08-30 23:38:53 +02001685
Luis R. Rodriguez0e3802d2013-11-05 09:18:12 -08001686 if (ignore_reg_update(wiphy, initiator)) {
1687 /*
1688 * Regulatory updates set by CORE are ignored for custom
1689 * regulatory cards. Let us notify the changes to the driver,
1690 * as some drivers used this to restore its orig_* reg domain.
1691 */
1692 if (initiator == NL80211_REGDOM_SET_BY_CORE &&
Luis R. Rodrigueza2f73b62013-11-11 22:15:29 +01001693 wiphy->regulatory_flags & REGULATORY_CUSTOM_REG)
Luis R. Rodriguez0e3802d2013-11-05 09:18:12 -08001694 reg_call_notifier(wiphy, lr);
Sven Neumanna203c2a2011-07-12 15:52:07 +02001695 return;
Luis R. Rodriguez0e3802d2013-11-05 09:18:12 -08001696 }
Sven Neumanna203c2a2011-07-12 15:52:07 +02001697
Johannes Bergc492db32012-12-06 16:29:25 +01001698 lr->dfs_region = get_cfg80211_regdom()->dfs_region;
Luis R. Rodriguezb68e6b32011-10-11 10:59:03 -07001699
Johannes Bergfdc9d7b2012-12-03 18:36:09 +01001700 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
1701 handle_band(wiphy, initiator, wiphy->bands[band]);
Sven Neumanna203c2a2011-07-12 15:52:07 +02001702
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05001703 reg_process_beacons(wiphy);
Luis R. Rodriguez038659e2009-05-02 00:37:17 -04001704 reg_process_ht_flags(wiphy);
Luis R. Rodriguez0e3802d2013-11-05 09:18:12 -08001705 reg_call_notifier(wiphy, lr);
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07001706}
1707
Sven Neumannd7549cb2011-08-30 23:38:54 +02001708static void update_all_wiphy_regulatory(enum nl80211_reg_initiator initiator)
1709{
1710 struct cfg80211_registered_device *rdev;
Rajkumar Manoharan4a389942011-12-08 23:59:26 +05301711 struct wiphy *wiphy;
Sven Neumannd7549cb2011-08-30 23:38:54 +02001712
Johannes Berg5fe231e2013-05-08 21:45:15 +02001713 ASSERT_RTNL();
Johannes Berg458f4f92012-12-06 15:47:38 +01001714
Rajkumar Manoharan4a389942011-12-08 23:59:26 +05301715 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
1716 wiphy = &rdev->wiphy;
1717 wiphy_update_regulatory(wiphy, initiator);
Rajkumar Manoharan4a389942011-12-08 23:59:26 +05301718 }
Arik Nemtsovad932f02014-11-27 09:44:55 +02001719
1720 reg_check_channels();
Sven Neumannd7549cb2011-08-30 23:38:54 +02001721}
1722
Luis R. Rodriguez1fa25e42009-01-22 15:05:44 -08001723static void handle_channel_custom(struct wiphy *wiphy,
Johannes Bergfdc9d7b2012-12-03 18:36:09 +01001724 struct ieee80211_channel *chan,
Luis R. Rodriguez1fa25e42009-01-22 15:05:44 -08001725 const struct ieee80211_regdomain *regd)
1726{
Luis R. Rodriguez038659e2009-05-02 00:37:17 -04001727 u32 bw_flags = 0;
Luis R. Rodriguez1fa25e42009-01-22 15:05:44 -08001728 const struct ieee80211_reg_rule *reg_rule = NULL;
1729 const struct ieee80211_power_rule *power_rule = NULL;
Luis R. Rodriguez038659e2009-05-02 00:37:17 -04001730 const struct ieee80211_freq_range *freq_range = NULL;
Janusz Dziedzic97524822014-01-30 09:52:20 +01001731 u32 max_bandwidth_khz;
Matthias May4edd5692015-07-17 15:28:39 +02001732 u32 bw;
Luis R. Rodriguez1fa25e42009-01-22 15:05:44 -08001733
Matthias May4edd5692015-07-17 15:28:39 +02001734 for (bw = MHZ_TO_KHZ(20); bw >= MHZ_TO_KHZ(5); bw = bw / 2) {
1735 reg_rule = freq_reg_info_regd(wiphy,
1736 MHZ_TO_KHZ(chan->center_freq),
1737 regd, bw);
1738 if (!IS_ERR(reg_rule))
1739 break;
1740 }
Luis R. Rodriguezac46d482009-05-01 18:44:50 -04001741
Johannes Berg361c9c82012-12-06 15:57:14 +01001742 if (IS_ERR(reg_rule)) {
Johannes Bergfe7ef5e2012-12-04 15:07:34 +01001743 REG_DBG_PRINT("Disabling freq %d MHz as custom regd has no rule that fits it\n",
1744 chan->center_freq);
Arik Nemtsovdb8dfee2014-12-15 19:26:02 +02001745 if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) {
1746 chan->flags |= IEEE80211_CHAN_DISABLED;
1747 } else {
1748 chan->orig_flags |= IEEE80211_CHAN_DISABLED;
1749 chan->flags = chan->orig_flags;
1750 }
Luis R. Rodriguez1fa25e42009-01-22 15:05:44 -08001751 return;
1752 }
1753
Janusz Dziedzicb0dfd2e2014-02-20 13:52:16 +01001754 chan_reg_rule_print_dbg(regd, chan, reg_rule);
Luis R. Rodrigueze702d3c2010-10-21 19:17:04 +05301755
Luis R. Rodriguez1fa25e42009-01-22 15:05:44 -08001756 power_rule = &reg_rule->power_rule;
Luis R. Rodriguez038659e2009-05-02 00:37:17 -04001757 freq_range = &reg_rule->freq_range;
Luis R. Rodriguez1fa25e42009-01-22 15:05:44 -08001758
Janusz Dziedzic97524822014-01-30 09:52:20 +01001759 max_bandwidth_khz = freq_range->max_bandwidth_khz;
1760 /* Check if auto calculation requested */
Janusz Dziedzicb0dfd2e2014-02-20 13:52:16 +01001761 if (reg_rule->flags & NL80211_RRF_AUTO_BW)
Janusz Dziedzic97524822014-01-30 09:52:20 +01001762 max_bandwidth_khz = reg_get_max_bandwidth(regd, reg_rule);
1763
Matthias May4edd5692015-07-17 15:28:39 +02001764 /* If we get a reg_rule we can assume that at least 5Mhz fit */
1765 if (!reg_does_bw_fit(freq_range, MHZ_TO_KHZ(chan->center_freq),
1766 MHZ_TO_KHZ(10)))
1767 bw_flags |= IEEE80211_CHAN_NO_10MHZ;
1768 if (!reg_does_bw_fit(freq_range, MHZ_TO_KHZ(chan->center_freq),
1769 MHZ_TO_KHZ(20)))
1770 bw_flags |= IEEE80211_CHAN_NO_20MHZ;
1771
1772 if (max_bandwidth_khz < MHZ_TO_KHZ(10))
1773 bw_flags |= IEEE80211_CHAN_NO_10MHZ;
1774 if (max_bandwidth_khz < MHZ_TO_KHZ(20))
1775 bw_flags |= IEEE80211_CHAN_NO_20MHZ;
Janusz Dziedzic97524822014-01-30 09:52:20 +01001776 if (max_bandwidth_khz < MHZ_TO_KHZ(40))
Matthias May4edd5692015-07-17 15:28:39 +02001777 bw_flags |= IEEE80211_CHAN_NO_HT40;
Janusz Dziedzic97524822014-01-30 09:52:20 +01001778 if (max_bandwidth_khz < MHZ_TO_KHZ(80))
Johannes Bergc7a6ee22012-12-12 17:50:39 +01001779 bw_flags |= IEEE80211_CHAN_NO_80MHZ;
Janusz Dziedzic97524822014-01-30 09:52:20 +01001780 if (max_bandwidth_khz < MHZ_TO_KHZ(160))
Johannes Bergc7a6ee22012-12-12 17:50:39 +01001781 bw_flags |= IEEE80211_CHAN_NO_160MHZ;
Luis R. Rodriguez038659e2009-05-02 00:37:17 -04001782
Arik Nemtsov2e18b382014-11-16 16:37:46 +02001783 chan->dfs_state_entered = jiffies;
Arik Nemtsovc7ab5082014-11-16 16:37:47 +02001784 chan->dfs_state = NL80211_DFS_USABLE;
1785
1786 chan->beacon_found = false;
Arik Nemtsovdb8dfee2014-12-15 19:26:02 +02001787
1788 if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED)
1789 chan->flags = chan->orig_flags | bw_flags |
1790 map_regdom_flags(reg_rule->flags);
1791 else
1792 chan->flags |= map_regdom_flags(reg_rule->flags) | bw_flags;
1793
Luis R. Rodriguez1fa25e42009-01-22 15:05:44 -08001794 chan->max_antenna_gain = (int) MBI_TO_DBI(power_rule->max_antenna_gain);
Felix Fietkau279f0f52012-10-17 13:56:20 +02001795 chan->max_reg_power = chan->max_power =
1796 (int) MBM_TO_DBM(power_rule->max_eirp);
Arik Nemtsov2e18b382014-11-16 16:37:46 +02001797
1798 if (chan->flags & IEEE80211_CHAN_RADAR) {
1799 if (reg_rule->dfs_cac_ms)
1800 chan->dfs_cac_ms = reg_rule->dfs_cac_ms;
1801 else
1802 chan->dfs_cac_ms = IEEE80211_DFS_MIN_CAC_TIME_MS;
1803 }
1804
1805 chan->max_power = chan->max_reg_power;
Luis R. Rodriguez1fa25e42009-01-22 15:05:44 -08001806}
1807
Johannes Bergfdc9d7b2012-12-03 18:36:09 +01001808static void handle_band_custom(struct wiphy *wiphy,
1809 struct ieee80211_supported_band *sband,
Luis R. Rodriguez1fa25e42009-01-22 15:05:44 -08001810 const struct ieee80211_regdomain *regd)
1811{
1812 unsigned int i;
Luis R. Rodriguez1fa25e42009-01-22 15:05:44 -08001813
Johannes Bergfdc9d7b2012-12-03 18:36:09 +01001814 if (!sband)
1815 return;
Luis R. Rodriguez1fa25e42009-01-22 15:05:44 -08001816
1817 for (i = 0; i < sband->n_channels; i++)
Johannes Bergfdc9d7b2012-12-03 18:36:09 +01001818 handle_channel_custom(wiphy, &sband->channels[i], regd);
Luis R. Rodriguez1fa25e42009-01-22 15:05:44 -08001819}
1820
1821/* Used by drivers prior to wiphy registration */
1822void wiphy_apply_custom_regulatory(struct wiphy *wiphy,
1823 const struct ieee80211_regdomain *regd)
1824{
1825 enum ieee80211_band band;
Luis R. Rodriguezbbcf3f02009-05-19 17:49:47 -04001826 unsigned int bands_set = 0;
Luis R. Rodriguezac46d482009-05-01 18:44:50 -04001827
Luis R. Rodrigueza2f73b62013-11-11 22:15:29 +01001828 WARN(!(wiphy->regulatory_flags & REGULATORY_CUSTOM_REG),
1829 "wiphy should have REGULATORY_CUSTOM_REG\n");
1830 wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG;
Luis R. Rodriguez222ea582013-11-05 09:18:00 -08001831
Luis R. Rodriguez1fa25e42009-01-22 15:05:44 -08001832 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
Luis R. Rodriguezbbcf3f02009-05-19 17:49:47 -04001833 if (!wiphy->bands[band])
1834 continue;
Johannes Bergfdc9d7b2012-12-03 18:36:09 +01001835 handle_band_custom(wiphy, wiphy->bands[band], regd);
Luis R. Rodriguezbbcf3f02009-05-19 17:49:47 -04001836 bands_set++;
Luis R. Rodriguez1fa25e42009-01-22 15:05:44 -08001837 }
Luis R. Rodriguezbbcf3f02009-05-19 17:49:47 -04001838
1839 /*
1840 * no point in calling this if it won't have any effect
Johannes Berg1a919312012-12-03 17:21:11 +01001841 * on your device's supported bands.
Luis R. Rodriguezbbcf3f02009-05-19 17:49:47 -04001842 */
1843 WARN_ON(!bands_set);
Luis R. Rodriguez1fa25e42009-01-22 15:05:44 -08001844}
1845EXPORT_SYMBOL(wiphy_apply_custom_regulatory);
1846
Luis R. Rodriguezb2e253c2010-11-17 21:46:09 -08001847static void reg_set_request_processed(void)
1848{
1849 bool need_more_processing = false;
Johannes Bergc492db32012-12-06 16:29:25 +01001850 struct regulatory_request *lr = get_last_request();
Luis R. Rodriguezb2e253c2010-11-17 21:46:09 -08001851
Johannes Bergc492db32012-12-06 16:29:25 +01001852 lr->processed = true;
Luis R. Rodriguezb2e253c2010-11-17 21:46:09 -08001853
1854 spin_lock(&reg_requests_lock);
1855 if (!list_empty(&reg_requests_list))
1856 need_more_processing = true;
1857 spin_unlock(&reg_requests_lock);
1858
Ilan peereeca9fc2015-03-04 00:32:07 -05001859 cancel_delayed_work(&reg_timeout);
Luis R. Rodrigueza90c7a32011-04-05 10:49:04 -07001860
Luis R. Rodriguezb2e253c2010-11-17 21:46:09 -08001861 if (need_more_processing)
1862 schedule_work(&reg_work);
1863}
1864
Luis R. Rodriguezd1c96a92009-02-21 00:24:13 -05001865/**
Luis R. Rodriguezb3eb7f32013-11-05 09:18:03 -08001866 * reg_process_hint_core - process core regulatory requests
1867 * @pending_request: a pending core regulatory request
1868 *
1869 * The wireless subsystem can use this function to process
1870 * a regulatory request issued by the regulatory core.
Luis R. Rodriguezb3eb7f32013-11-05 09:18:03 -08001871 */
Johannes Berg25b20db2015-10-15 12:05:05 +02001872static void reg_process_hint_core(struct regulatory_request *core_request)
Luis R. Rodriguezb3eb7f32013-11-05 09:18:03 -08001873{
Johannes Bergcecbb062015-10-15 08:47:34 +02001874 if (reg_query_database(core_request)) {
Johannes Berg25b20db2015-10-15 12:05:05 +02001875 core_request->intersect = false;
1876 core_request->processed = false;
1877 reg_update_last_request(core_request);
1878 }
Luis R. Rodriguezb3eb7f32013-11-05 09:18:03 -08001879}
1880
Luis R. Rodriguez0d97a612013-11-05 09:18:04 -08001881static enum reg_request_treatment
1882__reg_process_hint_user(struct regulatory_request *user_request)
1883{
1884 struct regulatory_request *lr = get_last_request();
1885
1886 if (reg_request_cell_base(user_request))
1887 return reg_ignore_cell_hint(user_request);
1888
1889 if (reg_request_cell_base(lr))
1890 return REG_REQ_IGNORE;
1891
1892 if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE)
1893 return REG_REQ_INTERSECT;
1894 /*
1895 * If the user knows better the user should set the regdom
1896 * to their country before the IE is picked up
1897 */
1898 if (lr->initiator == NL80211_REGDOM_SET_BY_USER &&
1899 lr->intersect)
1900 return REG_REQ_IGNORE;
1901 /*
1902 * Process user requests only after previous user/driver/core
1903 * requests have been processed
1904 */
1905 if ((lr->initiator == NL80211_REGDOM_SET_BY_CORE ||
1906 lr->initiator == NL80211_REGDOM_SET_BY_DRIVER ||
1907 lr->initiator == NL80211_REGDOM_SET_BY_USER) &&
1908 regdom_changes(lr->alpha2))
1909 return REG_REQ_IGNORE;
1910
1911 if (!regdom_changes(user_request->alpha2))
1912 return REG_REQ_ALREADY_SET;
1913
1914 return REG_REQ_OK;
1915}
1916
1917/**
1918 * reg_process_hint_user - process user regulatory requests
1919 * @user_request: a pending user regulatory request
1920 *
1921 * The wireless subsystem can use this function to process
1922 * a regulatory request initiated by userspace.
Luis R. Rodriguez0d97a612013-11-05 09:18:04 -08001923 */
Johannes Berg25b20db2015-10-15 12:05:05 +02001924static void reg_process_hint_user(struct regulatory_request *user_request)
Luis R. Rodriguez0d97a612013-11-05 09:18:04 -08001925{
1926 enum reg_request_treatment treatment;
Luis R. Rodriguez0d97a612013-11-05 09:18:04 -08001927
1928 treatment = __reg_process_hint_user(user_request);
1929 if (treatment == REG_REQ_IGNORE ||
Ilan peer0c4ddcd2015-03-04 00:32:05 -05001930 treatment == REG_REQ_ALREADY_SET) {
Arik Nemtsovc8883932014-04-21 20:39:34 -07001931 reg_free_request(user_request);
Johannes Berg25b20db2015-10-15 12:05:05 +02001932 return;
Luis R. Rodriguez0d97a612013-11-05 09:18:04 -08001933 }
1934
Luis R. Rodriguez0d97a612013-11-05 09:18:04 -08001935 user_request->intersect = treatment == REG_REQ_INTERSECT;
1936 user_request->processed = false;
Luis R. Rodriguez5ad6ef52013-11-05 09:18:08 -08001937
Johannes Bergcecbb062015-10-15 08:47:34 +02001938 if (reg_query_database(user_request)) {
Johannes Berg25b20db2015-10-15 12:05:05 +02001939 reg_update_last_request(user_request);
1940 user_alpha2[0] = user_request->alpha2[0];
1941 user_alpha2[1] = user_request->alpha2[1];
1942 } else {
1943 reg_free_request(user_request);
1944 }
Luis R. Rodriguez0d97a612013-11-05 09:18:04 -08001945}
1946
Luis R. Rodriguez21636c72013-11-05 09:18:05 -08001947static enum reg_request_treatment
1948__reg_process_hint_driver(struct regulatory_request *driver_request)
1949{
1950 struct regulatory_request *lr = get_last_request();
1951
1952 if (lr->initiator == NL80211_REGDOM_SET_BY_CORE) {
1953 if (regdom_changes(driver_request->alpha2))
1954 return REG_REQ_OK;
1955 return REG_REQ_ALREADY_SET;
1956 }
1957
1958 /*
1959 * This would happen if you unplug and plug your card
1960 * back in or if you add a new device for which the previously
1961 * loaded card also agrees on the regulatory domain.
1962 */
1963 if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER &&
1964 !regdom_changes(driver_request->alpha2))
1965 return REG_REQ_ALREADY_SET;
1966
1967 return REG_REQ_INTERSECT;
1968}
1969
1970/**
1971 * reg_process_hint_driver - process driver regulatory requests
1972 * @driver_request: a pending driver regulatory request
1973 *
1974 * The wireless subsystem can use this function to process
1975 * a regulatory request issued by an 802.11 driver.
1976 *
1977 * Returns one of the different reg request treatment values.
1978 */
1979static enum reg_request_treatment
1980reg_process_hint_driver(struct wiphy *wiphy,
1981 struct regulatory_request *driver_request)
1982{
Arik Nemtsov34f05f52014-12-04 12:22:16 +02001983 const struct ieee80211_regdomain *regd, *tmp;
Luis R. Rodriguez21636c72013-11-05 09:18:05 -08001984 enum reg_request_treatment treatment;
Luis R. Rodriguez21636c72013-11-05 09:18:05 -08001985
1986 treatment = __reg_process_hint_driver(driver_request);
1987
1988 switch (treatment) {
1989 case REG_REQ_OK:
1990 break;
1991 case REG_REQ_IGNORE:
Arik Nemtsovc8883932014-04-21 20:39:34 -07001992 reg_free_request(driver_request);
Luis R. Rodriguez21636c72013-11-05 09:18:05 -08001993 return treatment;
1994 case REG_REQ_INTERSECT:
1995 /* fall through */
1996 case REG_REQ_ALREADY_SET:
1997 regd = reg_copy_regd(get_cfg80211_regdom());
1998 if (IS_ERR(regd)) {
Arik Nemtsovc8883932014-04-21 20:39:34 -07001999 reg_free_request(driver_request);
Luis R. Rodriguez21636c72013-11-05 09:18:05 -08002000 return REG_REQ_IGNORE;
2001 }
Arik Nemtsov34f05f52014-12-04 12:22:16 +02002002
2003 tmp = get_wiphy_regdom(wiphy);
Luis R. Rodriguez21636c72013-11-05 09:18:05 -08002004 rcu_assign_pointer(wiphy->regd, regd);
Arik Nemtsov34f05f52014-12-04 12:22:16 +02002005 rcu_free_regdom(tmp);
Luis R. Rodriguez21636c72013-11-05 09:18:05 -08002006 }
2007
Luis R. Rodriguez21636c72013-11-05 09:18:05 -08002008
2009 driver_request->intersect = treatment == REG_REQ_INTERSECT;
2010 driver_request->processed = false;
Luis R. Rodriguez5ad6ef52013-11-05 09:18:08 -08002011
Luis R. Rodriguez21636c72013-11-05 09:18:05 -08002012 /*
2013 * Since CRDA will not be called in this case as we already
2014 * have applied the requested regulatory domain before we just
2015 * inform userspace we have processed the request
2016 */
2017 if (treatment == REG_REQ_ALREADY_SET) {
2018 nl80211_send_reg_change_event(driver_request);
Johannes Berg25b20db2015-10-15 12:05:05 +02002019 reg_update_last_request(driver_request);
Luis R. Rodriguez21636c72013-11-05 09:18:05 -08002020 reg_set_request_processed();
2021 return treatment;
2022 }
2023
Johannes Bergcecbb062015-10-15 08:47:34 +02002024 if (reg_query_database(driver_request))
Johannes Berg25b20db2015-10-15 12:05:05 +02002025 reg_update_last_request(driver_request);
2026 else
2027 reg_free_request(driver_request);
2028
2029 return REG_REQ_OK;
Luis R. Rodriguez21636c72013-11-05 09:18:05 -08002030}
2031
Luis R. Rodriguezb23e7a92013-11-05 09:18:06 -08002032static enum reg_request_treatment
2033__reg_process_hint_country_ie(struct wiphy *wiphy,
2034 struct regulatory_request *country_ie_request)
2035{
2036 struct wiphy *last_wiphy = NULL;
2037 struct regulatory_request *lr = get_last_request();
2038
2039 if (reg_request_cell_base(lr)) {
2040 /* Trust a Cell base station over the AP's country IE */
2041 if (regdom_changes(country_ie_request->alpha2))
2042 return REG_REQ_IGNORE;
2043 return REG_REQ_ALREADY_SET;
Luis R. Rodriguez2a901462013-11-11 22:15:31 +01002044 } else {
2045 if (wiphy->regulatory_flags & REGULATORY_COUNTRY_IE_IGNORE)
2046 return REG_REQ_IGNORE;
Luis R. Rodriguezb23e7a92013-11-05 09:18:06 -08002047 }
2048
Luis R. Rodriguezb23e7a92013-11-05 09:18:06 -08002049 if (unlikely(!is_an_alpha2(country_ie_request->alpha2)))
2050 return -EINVAL;
Luis R. Rodriguez2f1c6c52013-11-05 09:18:07 -08002051
2052 if (lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE)
2053 return REG_REQ_OK;
2054
2055 last_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx);
2056
2057 if (last_wiphy != wiphy) {
Luis R. Rodriguezb23e7a92013-11-05 09:18:06 -08002058 /*
Luis R. Rodriguez2f1c6c52013-11-05 09:18:07 -08002059 * Two cards with two APs claiming different
2060 * Country IE alpha2s. We could
2061 * intersect them, but that seems unlikely
2062 * to be correct. Reject second one for now.
Luis R. Rodriguezb23e7a92013-11-05 09:18:06 -08002063 */
Luis R. Rodriguez2f1c6c52013-11-05 09:18:07 -08002064 if (regdom_changes(country_ie_request->alpha2))
2065 return REG_REQ_IGNORE;
Luis R. Rodriguezb23e7a92013-11-05 09:18:06 -08002066 return REG_REQ_ALREADY_SET;
2067 }
Emmanuel Grumbach70dcec52014-12-02 09:53:25 +02002068
2069 if (regdom_changes(country_ie_request->alpha2))
Luis R. Rodriguez2f1c6c52013-11-05 09:18:07 -08002070 return REG_REQ_OK;
2071 return REG_REQ_ALREADY_SET;
Luis R. Rodriguezb23e7a92013-11-05 09:18:06 -08002072}
2073
Luis R. Rodriguezb3eb7f32013-11-05 09:18:03 -08002074/**
Luis R. Rodriguezb23e7a92013-11-05 09:18:06 -08002075 * reg_process_hint_country_ie - process regulatory requests from country IEs
2076 * @country_ie_request: a regulatory request from a country IE
Luis R. Rodriguezd1c96a92009-02-21 00:24:13 -05002077 *
Luis R. Rodriguezb23e7a92013-11-05 09:18:06 -08002078 * The wireless subsystem can use this function to process
2079 * a regulatory request issued by a country Information Element.
Luis R. Rodriguezd1c96a92009-02-21 00:24:13 -05002080 *
Johannes Berg2f922122012-12-03 17:54:55 +01002081 * Returns one of the different reg request treatment values.
Luis R. Rodriguezd1c96a92009-02-21 00:24:13 -05002082 */
Johannes Berg2f922122012-12-03 17:54:55 +01002083static enum reg_request_treatment
Luis R. Rodriguezb23e7a92013-11-05 09:18:06 -08002084reg_process_hint_country_ie(struct wiphy *wiphy,
2085 struct regulatory_request *country_ie_request)
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002086{
Johannes Berg2f922122012-12-03 17:54:55 +01002087 enum reg_request_treatment treatment;
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002088
Luis R. Rodriguezb23e7a92013-11-05 09:18:06 -08002089 treatment = __reg_process_hint_country_ie(wiphy, country_ie_request);
Luis R. Rodriguez761cf7e2009-02-21 00:04:25 -05002090
Johannes Berg2f922122012-12-03 17:54:55 +01002091 switch (treatment) {
Johannes Berg2f922122012-12-03 17:54:55 +01002092 case REG_REQ_OK:
2093 break;
Luis R. Rodriguezb23e7a92013-11-05 09:18:06 -08002094 case REG_REQ_IGNORE:
2095 /* fall through */
2096 case REG_REQ_ALREADY_SET:
Arik Nemtsovc8883932014-04-21 20:39:34 -07002097 reg_free_request(country_ie_request);
Johannes Berg2f922122012-12-03 17:54:55 +01002098 return treatment;
Luis R. Rodriguezb23e7a92013-11-05 09:18:06 -08002099 case REG_REQ_INTERSECT:
Arik Nemtsovc8883932014-04-21 20:39:34 -07002100 reg_free_request(country_ie_request);
Luis R. Rodriguezb23e7a92013-11-05 09:18:06 -08002101 /*
2102 * This doesn't happen yet, not sure we
2103 * ever want to support it for this case.
2104 */
2105 WARN_ONCE(1, "Unexpected intersection for country IEs");
2106 return REG_REQ_IGNORE;
Luis R. Rodriguez3e0c3ff2009-01-07 17:43:34 -08002107 }
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002108
Luis R. Rodriguezb23e7a92013-11-05 09:18:06 -08002109 country_ie_request->intersect = false;
2110 country_ie_request->processed = false;
Luis R. Rodriguez5ad6ef52013-11-05 09:18:08 -08002111
Johannes Bergcecbb062015-10-15 08:47:34 +02002112 if (reg_query_database(country_ie_request))
Johannes Berg25b20db2015-10-15 12:05:05 +02002113 reg_update_last_request(country_ie_request);
2114 else
2115 reg_free_request(country_ie_request);
Luis R. Rodriguezd951c1d2009-02-21 00:24:15 -05002116
Johannes Berg25b20db2015-10-15 12:05:05 +02002117 return REG_REQ_OK;
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002118}
2119
Luis R. Rodriguez30a548c2009-05-02 01:17:27 -04002120/* This processes *all* regulatory hints */
Luis R. Rodriguez1daa37c2013-11-05 09:18:02 -08002121static void reg_process_hint(struct regulatory_request *reg_request)
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002122{
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002123 struct wiphy *wiphy = NULL;
Luis R. Rodriguezb3eb7f32013-11-05 09:18:03 -08002124 enum reg_request_treatment treatment;
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002125
Johannes Bergf4173762012-12-03 18:23:37 +01002126 if (reg_request->wiphy_idx != WIPHY_IDX_INVALID)
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002127 wiphy = wiphy_idx_to_wiphy(reg_request->wiphy_idx);
2128
Luis R. Rodriguezb3eb7f32013-11-05 09:18:03 -08002129 switch (reg_request->initiator) {
2130 case NL80211_REGDOM_SET_BY_CORE:
2131 reg_process_hint_core(reg_request);
2132 return;
2133 case NL80211_REGDOM_SET_BY_USER:
John Linville841b3512015-06-24 11:42:25 -04002134 reg_process_hint_user(reg_request);
Luis R. Rodriguez0d97a612013-11-05 09:18:04 -08002135 return;
Luis R. Rodriguezb3eb7f32013-11-05 09:18:03 -08002136 case NL80211_REGDOM_SET_BY_DRIVER:
Ilan Peer772f0382014-01-14 15:17:23 +02002137 if (!wiphy)
2138 goto out_free;
Luis R. Rodriguez21636c72013-11-05 09:18:05 -08002139 treatment = reg_process_hint_driver(wiphy, reg_request);
2140 break;
Luis R. Rodriguezb3eb7f32013-11-05 09:18:03 -08002141 case NL80211_REGDOM_SET_BY_COUNTRY_IE:
Ilan Peer772f0382014-01-14 15:17:23 +02002142 if (!wiphy)
2143 goto out_free;
Luis R. Rodriguezb23e7a92013-11-05 09:18:06 -08002144 treatment = reg_process_hint_country_ie(wiphy, reg_request);
Luis R. Rodriguezb3eb7f32013-11-05 09:18:03 -08002145 break;
2146 default:
2147 WARN(1, "invalid initiator %d\n", reg_request->initiator);
Ilan Peer772f0382014-01-14 15:17:23 +02002148 goto out_free;
Luis R. Rodriguezb3eb7f32013-11-05 09:18:03 -08002149 }
2150
John Linville841b3512015-06-24 11:42:25 -04002151 /* This is required so that the orig_* parameters are saved.
2152 * NOTE: treatment must be set for any case that reaches here!
2153 */
Luis R. Rodriguezb23e7a92013-11-05 09:18:06 -08002154 if (treatment == REG_REQ_ALREADY_SET && wiphy &&
Arik Nemtsovad932f02014-11-27 09:44:55 +02002155 wiphy->regulatory_flags & REGULATORY_STRICT_REG) {
Luis R. Rodriguezb23e7a92013-11-05 09:18:06 -08002156 wiphy_update_regulatory(wiphy, reg_request->initiator);
Arik Nemtsovad932f02014-11-27 09:44:55 +02002157 reg_check_channels();
2158 }
Ilan Peer772f0382014-01-14 15:17:23 +02002159
2160 return;
2161
2162out_free:
Arik Nemtsovc8883932014-04-21 20:39:34 -07002163 reg_free_request(reg_request);
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002164}
2165
Arik Nemtsovef51fb12015-01-07 16:47:20 +02002166static bool reg_only_self_managed_wiphys(void)
2167{
2168 struct cfg80211_registered_device *rdev;
2169 struct wiphy *wiphy;
2170 bool self_managed_found = false;
2171
2172 ASSERT_RTNL();
2173
2174 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
2175 wiphy = &rdev->wiphy;
2176 if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED)
2177 self_managed_found = true;
2178 else
2179 return false;
2180 }
2181
2182 /* make sure at least one self-managed wiphy exists */
2183 return self_managed_found;
2184}
2185
Luis R. Rodriguezb2e253c2010-11-17 21:46:09 -08002186/*
2187 * Processes regulatory hints, this is all the NL80211_REGDOM_SET_BY_*
2188 * Regulatory hints come on a first come first serve basis and we
2189 * must process each one atomically.
2190 */
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002191static void reg_process_pending_hints(void)
Luis R. Rodriguezb0e28802010-11-17 21:46:08 -08002192{
Johannes Bergc492db32012-12-06 16:29:25 +01002193 struct regulatory_request *reg_request, *lr;
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002194
Johannes Bergc492db32012-12-06 16:29:25 +01002195 lr = get_last_request();
Luis R. Rodriguezb0e28802010-11-17 21:46:08 -08002196
Luis R. Rodriguezb2e253c2010-11-17 21:46:09 -08002197 /* When last_request->processed becomes true this will be rescheduled */
Johannes Bergc492db32012-12-06 16:29:25 +01002198 if (lr && !lr->processed) {
Luis R. Rodriguez96cce122014-04-21 20:39:35 -07002199 reg_process_hint(lr);
Johannes Berg5fe231e2013-05-08 21:45:15 +02002200 return;
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002201 }
Luis R. Rodriguezb2e253c2010-11-17 21:46:09 -08002202
2203 spin_lock(&reg_requests_lock);
2204
2205 if (list_empty(&reg_requests_list)) {
2206 spin_unlock(&reg_requests_lock);
Johannes Berg5fe231e2013-05-08 21:45:15 +02002207 return;
Luis R. Rodriguezb2e253c2010-11-17 21:46:09 -08002208 }
2209
2210 reg_request = list_first_entry(&reg_requests_list,
2211 struct regulatory_request,
2212 list);
2213 list_del_init(&reg_request->list);
2214
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002215 spin_unlock(&reg_requests_lock);
Luis R. Rodriguezb0e28802010-11-17 21:46:08 -08002216
Arik Nemtsovef51fb12015-01-07 16:47:20 +02002217 if (reg_only_self_managed_wiphys()) {
2218 reg_free_request(reg_request);
2219 return;
2220 }
2221
Luis R. Rodriguez1daa37c2013-11-05 09:18:02 -08002222 reg_process_hint(reg_request);
Ben2e54a682015-03-12 09:37:34 -04002223
2224 lr = get_last_request();
2225
2226 spin_lock(&reg_requests_lock);
2227 if (!list_empty(&reg_requests_list) && lr && lr->processed)
2228 schedule_work(&reg_work);
2229 spin_unlock(&reg_requests_lock);
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002230}
2231
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05002232/* Processes beacon hints -- this has nothing to do with country IEs */
2233static void reg_process_pending_beacon_hints(void)
2234{
Johannes Berg79c97e92009-07-07 03:56:12 +02002235 struct cfg80211_registered_device *rdev;
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05002236 struct reg_beacon *pending_beacon, *tmp;
2237
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05002238 /* This goes through the _pending_ beacon list */
2239 spin_lock_bh(&reg_pending_beacons_lock);
2240
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05002241 list_for_each_entry_safe(pending_beacon, tmp,
2242 &reg_pending_beacons, list) {
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05002243 list_del_init(&pending_beacon->list);
2244
2245 /* Applies the beacon hint to current wiphys */
Johannes Berg79c97e92009-07-07 03:56:12 +02002246 list_for_each_entry(rdev, &cfg80211_rdev_list, list)
2247 wiphy_update_new_beacon(&rdev->wiphy, pending_beacon);
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05002248
2249 /* Remembers the beacon hint for new wiphys or reg changes */
2250 list_add_tail(&pending_beacon->list, &reg_beacon_list);
2251 }
2252
2253 spin_unlock_bh(&reg_pending_beacons_lock);
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05002254}
2255
Jonathan Doronb0d7aa52014-12-15 19:26:00 +02002256static void reg_process_self_managed_hints(void)
2257{
2258 struct cfg80211_registered_device *rdev;
2259 struct wiphy *wiphy;
2260 const struct ieee80211_regdomain *tmp;
2261 const struct ieee80211_regdomain *regd;
2262 enum ieee80211_band band;
2263 struct regulatory_request request = {};
2264
2265 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
2266 wiphy = &rdev->wiphy;
2267
2268 spin_lock(&reg_requests_lock);
2269 regd = rdev->requested_regd;
2270 rdev->requested_regd = NULL;
2271 spin_unlock(&reg_requests_lock);
2272
2273 if (regd == NULL)
2274 continue;
2275
2276 tmp = get_wiphy_regdom(wiphy);
2277 rcu_assign_pointer(wiphy->regd, regd);
2278 rcu_free_regdom(tmp);
2279
2280 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
2281 handle_band_custom(wiphy, wiphy->bands[band], regd);
2282
2283 reg_process_ht_flags(wiphy);
2284
2285 request.wiphy_idx = get_wiphy_idx(wiphy);
2286 request.alpha2[0] = regd->alpha2[0];
2287 request.alpha2[1] = regd->alpha2[1];
2288 request.initiator = NL80211_REGDOM_SET_BY_DRIVER;
2289
2290 nl80211_send_wiphy_reg_change_event(&request);
2291 }
2292
2293 reg_check_channels();
2294}
2295
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002296static void reg_todo(struct work_struct *work)
2297{
Johannes Berg5fe231e2013-05-08 21:45:15 +02002298 rtnl_lock();
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002299 reg_process_pending_hints();
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05002300 reg_process_pending_beacon_hints();
Jonathan Doronb0d7aa52014-12-15 19:26:00 +02002301 reg_process_self_managed_hints();
Johannes Berg5fe231e2013-05-08 21:45:15 +02002302 rtnl_unlock();
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002303}
2304
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002305static void queue_regulatory_request(struct regulatory_request *request)
2306{
Johannes Bergd4f2c882012-12-03 18:59:58 +01002307 request->alpha2[0] = toupper(request->alpha2[0]);
2308 request->alpha2[1] = toupper(request->alpha2[1]);
John W. Linvillec61029c2010-08-05 14:26:24 -04002309
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002310 spin_lock(&reg_requests_lock);
2311 list_add_tail(&request->list, &reg_requests_list);
2312 spin_unlock(&reg_requests_lock);
2313
2314 schedule_work(&reg_work);
2315}
2316
Luis R. Rodriguez09d989d2010-01-29 19:58:57 -05002317/*
2318 * Core regulatory hint -- happens during cfg80211_init()
2319 * and when we restore regulatory settings.
2320 */
Luis R. Rodriguezba25c142009-02-21 00:04:23 -05002321static int regulatory_hint_core(const char *alpha2)
2322{
2323 struct regulatory_request *request;
2324
Johannes Berg1a919312012-12-03 17:21:11 +01002325 request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL);
Luis R. Rodriguezba25c142009-02-21 00:04:23 -05002326 if (!request)
2327 return -ENOMEM;
2328
2329 request->alpha2[0] = alpha2[0];
2330 request->alpha2[1] = alpha2[1];
Luis R. Rodriguez7db90f42009-03-09 22:07:41 -04002331 request->initiator = NL80211_REGDOM_SET_BY_CORE;
Luis R. Rodriguezba25c142009-02-21 00:04:23 -05002332
Luis R. Rodriguez31e99722010-11-17 21:46:06 -08002333 queue_regulatory_request(request);
Luis R. Rodriguez5078b2e2009-05-13 17:04:42 -04002334
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002335 return 0;
Luis R. Rodriguezba25c142009-02-21 00:04:23 -05002336}
2337
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002338/* User hints */
Luis R. Rodriguez57b5ce02012-07-12 11:49:18 -07002339int regulatory_hint_user(const char *alpha2,
2340 enum nl80211_user_reg_hint_type user_reg_hint_type)
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002341{
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002342 struct regulatory_request *request;
2343
Johannes Bergfdc9d7b2012-12-03 18:36:09 +01002344 if (WARN_ON(!alpha2))
2345 return -EINVAL;
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002346
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002347 request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL);
2348 if (!request)
2349 return -ENOMEM;
2350
Johannes Bergf4173762012-12-03 18:23:37 +01002351 request->wiphy_idx = WIPHY_IDX_INVALID;
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002352 request->alpha2[0] = alpha2[0];
2353 request->alpha2[1] = alpha2[1];
Luis R. Rodrigueze12822e2010-01-04 11:37:39 -05002354 request->initiator = NL80211_REGDOM_SET_BY_USER;
Luis R. Rodriguez57b5ce02012-07-12 11:49:18 -07002355 request->user_reg_hint_type = user_reg_hint_type;
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002356
Ilan peerc37722b2015-03-30 15:15:49 +03002357 /* Allow calling CRDA again */
2358 reg_crda_timeouts = 0;
2359
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002360 queue_regulatory_request(request);
2361
2362 return 0;
2363}
2364
Ilan peer05050752015-03-04 00:32:06 -05002365int regulatory_hint_indoor(bool is_indoor, u32 portid)
Ilan Peer52616f22014-02-25 16:26:00 +02002366{
Ilan peer05050752015-03-04 00:32:06 -05002367 spin_lock(&reg_indoor_lock);
Ilan Peer52616f22014-02-25 16:26:00 +02002368
Ilan peer05050752015-03-04 00:32:06 -05002369 /* It is possible that more than one user space process is trying to
2370 * configure the indoor setting. To handle such cases, clear the indoor
2371 * setting in case that some process does not think that the device
2372 * is operating in an indoor environment. In addition, if a user space
2373 * process indicates that it is controlling the indoor setting, save its
2374 * portid, i.e., make it the owner.
2375 */
2376 reg_is_indoor = is_indoor;
2377 if (reg_is_indoor) {
2378 if (!reg_is_indoor_portid)
2379 reg_is_indoor_portid = portid;
2380 } else {
2381 reg_is_indoor_portid = 0;
2382 }
Ilan Peer52616f22014-02-25 16:26:00 +02002383
Ilan peer05050752015-03-04 00:32:06 -05002384 spin_unlock(&reg_indoor_lock);
2385
2386 if (!is_indoor)
2387 reg_check_channels();
Ilan Peer52616f22014-02-25 16:26:00 +02002388
2389 return 0;
2390}
2391
Ilan peer05050752015-03-04 00:32:06 -05002392void regulatory_netlink_notify(u32 portid)
2393{
2394 spin_lock(&reg_indoor_lock);
2395
2396 if (reg_is_indoor_portid != portid) {
2397 spin_unlock(&reg_indoor_lock);
2398 return;
2399 }
2400
2401 reg_is_indoor = false;
2402 reg_is_indoor_portid = 0;
2403
2404 spin_unlock(&reg_indoor_lock);
2405
2406 reg_check_channels();
2407}
2408
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002409/* Driver hints */
2410int regulatory_hint(struct wiphy *wiphy, const char *alpha2)
2411{
2412 struct regulatory_request *request;
2413
Johannes Bergfdc9d7b2012-12-03 18:36:09 +01002414 if (WARN_ON(!alpha2 || !wiphy))
2415 return -EINVAL;
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002416
Luis R. Rodriguez4f7b9142013-12-14 20:09:06 +01002417 wiphy->regulatory_flags &= ~REGULATORY_CUSTOM_REG;
2418
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002419 request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL);
2420 if (!request)
2421 return -ENOMEM;
2422
2423 request->wiphy_idx = get_wiphy_idx(wiphy);
2424
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002425 request->alpha2[0] = alpha2[0];
2426 request->alpha2[1] = alpha2[1];
Luis R. Rodriguez7db90f42009-03-09 22:07:41 -04002427 request->initiator = NL80211_REGDOM_SET_BY_DRIVER;
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002428
Ilan peerc37722b2015-03-30 15:15:49 +03002429 /* Allow calling CRDA again */
2430 reg_crda_timeouts = 0;
2431
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002432 queue_regulatory_request(request);
2433
2434 return 0;
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002435}
2436EXPORT_SYMBOL(regulatory_hint);
2437
Luis R. Rodriguez789fd032013-10-04 18:07:24 -07002438void regulatory_hint_country_ie(struct wiphy *wiphy, enum ieee80211_band band,
2439 const u8 *country_ie, u8 country_ie_len)
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -08002440{
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -08002441 char alpha2[2];
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -08002442 enum environment_cap env = ENVIRON_ANY;
Johannes Bergdb2424c2013-05-10 19:07:52 +02002443 struct regulatory_request *request = NULL, *lr;
Luis R. Rodriguezd335fe62009-02-21 00:04:27 -05002444
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -08002445 /* IE len must be evenly divisible by 2 */
2446 if (country_ie_len & 0x01)
Johannes Bergdb2424c2013-05-10 19:07:52 +02002447 return;
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -08002448
2449 if (country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
Johannes Bergdb2424c2013-05-10 19:07:52 +02002450 return;
2451
2452 request = kzalloc(sizeof(*request), GFP_KERNEL);
2453 if (!request)
2454 return;
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -08002455
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -08002456 alpha2[0] = country_ie[0];
2457 alpha2[1] = country_ie[1];
2458
2459 if (country_ie[2] == 'I')
2460 env = ENVIRON_INDOOR;
2461 else if (country_ie[2] == 'O')
2462 env = ENVIRON_OUTDOOR;
2463
Johannes Bergdb2424c2013-05-10 19:07:52 +02002464 rcu_read_lock();
2465 lr = get_last_request();
2466
2467 if (unlikely(!lr))
2468 goto out;
2469
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -05002470 /*
Luis R. Rodriguez8b19e6c2009-07-30 17:38:09 -07002471 * We will run this only upon a successful connection on cfg80211.
Luis R. Rodriguez4b44c8b2009-07-30 17:38:07 -07002472 * We leave conflict resolution to the workqueue, where can hold
Johannes Berg5fe231e2013-05-08 21:45:15 +02002473 * the RTNL.
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -05002474 */
Johannes Bergc492db32012-12-06 16:29:25 +01002475 if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE &&
2476 lr->wiphy_idx != WIPHY_IDX_INVALID)
Luis R. Rodriguez4b44c8b2009-07-30 17:38:07 -07002477 goto out;
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -08002478
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002479 request->wiphy_idx = get_wiphy_idx(wiphy);
John W. Linville4f366c52010-07-15 14:57:33 -04002480 request->alpha2[0] = alpha2[0];
2481 request->alpha2[1] = alpha2[1];
Luis R. Rodriguez7db90f42009-03-09 22:07:41 -04002482 request->initiator = NL80211_REGDOM_SET_BY_COUNTRY_IE;
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002483 request->country_ie_env = env;
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -08002484
Ilan peerc37722b2015-03-30 15:15:49 +03002485 /* Allow calling CRDA again */
2486 reg_crda_timeouts = 0;
2487
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002488 queue_regulatory_request(request);
Johannes Bergdb2424c2013-05-10 19:07:52 +02002489 request = NULL;
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -08002490out:
Johannes Bergdb2424c2013-05-10 19:07:52 +02002491 kfree(request);
2492 rcu_read_unlock();
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -08002493}
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002494
Luis R. Rodriguez09d989d2010-01-29 19:58:57 -05002495static void restore_alpha2(char *alpha2, bool reset_user)
2496{
2497 /* indicates there is no alpha2 to consider for restoration */
2498 alpha2[0] = '9';
2499 alpha2[1] = '7';
2500
2501 /* The user setting has precedence over the module parameter */
2502 if (is_user_regdom_saved()) {
2503 /* Unless we're asked to ignore it and reset it */
2504 if (reset_user) {
Johannes Berg1a919312012-12-03 17:21:11 +01002505 REG_DBG_PRINT("Restoring regulatory settings including user preference\n");
Luis R. Rodriguez09d989d2010-01-29 19:58:57 -05002506 user_alpha2[0] = '9';
2507 user_alpha2[1] = '7';
2508
2509 /*
2510 * If we're ignoring user settings, we still need to
2511 * check the module parameter to ensure we put things
2512 * back as they were for a full restore.
2513 */
2514 if (!is_world_regdom(ieee80211_regdom)) {
Johannes Berg1a919312012-12-03 17:21:11 +01002515 REG_DBG_PRINT("Keeping preference on module parameter ieee80211_regdom: %c%c\n",
2516 ieee80211_regdom[0], ieee80211_regdom[1]);
Luis R. Rodriguez09d989d2010-01-29 19:58:57 -05002517 alpha2[0] = ieee80211_regdom[0];
2518 alpha2[1] = ieee80211_regdom[1];
2519 }
2520 } else {
Johannes Berg1a919312012-12-03 17:21:11 +01002521 REG_DBG_PRINT("Restoring regulatory settings while preserving user preference for: %c%c\n",
2522 user_alpha2[0], user_alpha2[1]);
Luis R. Rodriguez09d989d2010-01-29 19:58:57 -05002523 alpha2[0] = user_alpha2[0];
2524 alpha2[1] = user_alpha2[1];
2525 }
2526 } else if (!is_world_regdom(ieee80211_regdom)) {
Johannes Berg1a919312012-12-03 17:21:11 +01002527 REG_DBG_PRINT("Keeping preference on module parameter ieee80211_regdom: %c%c\n",
2528 ieee80211_regdom[0], ieee80211_regdom[1]);
Luis R. Rodriguez09d989d2010-01-29 19:58:57 -05002529 alpha2[0] = ieee80211_regdom[0];
2530 alpha2[1] = ieee80211_regdom[1];
2531 } else
Luis R. Rodriguezd91e41b2010-10-20 10:18:59 -07002532 REG_DBG_PRINT("Restoring regulatory settings\n");
Luis R. Rodriguez09d989d2010-01-29 19:58:57 -05002533}
2534
Rajkumar Manoharan5ce543d2011-12-07 21:50:08 +05302535static void restore_custom_reg_settings(struct wiphy *wiphy)
2536{
2537 struct ieee80211_supported_band *sband;
2538 enum ieee80211_band band;
2539 struct ieee80211_channel *chan;
2540 int i;
2541
2542 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
2543 sband = wiphy->bands[band];
2544 if (!sband)
2545 continue;
2546 for (i = 0; i < sband->n_channels; i++) {
2547 chan = &sband->channels[i];
2548 chan->flags = chan->orig_flags;
2549 chan->max_antenna_gain = chan->orig_mag;
2550 chan->max_power = chan->orig_mpwr;
Paul Stewart899852a2012-08-01 16:54:42 -07002551 chan->beacon_found = false;
Rajkumar Manoharan5ce543d2011-12-07 21:50:08 +05302552 }
2553 }
2554}
2555
Luis R. Rodriguez09d989d2010-01-29 19:58:57 -05002556/*
2557 * Restoring regulatory settings involves ingoring any
2558 * possibly stale country IE information and user regulatory
2559 * settings if so desired, this includes any beacon hints
2560 * learned as we could have traveled outside to another country
2561 * after disconnection. To restore regulatory settings we do
2562 * exactly what we did at bootup:
2563 *
2564 * - send a core regulatory hint
2565 * - send a user regulatory hint if applicable
2566 *
2567 * Device drivers that send a regulatory hint for a specific country
2568 * keep their own regulatory domain on wiphy->regd so that does does
2569 * not need to be remembered.
2570 */
2571static void restore_regulatory_settings(bool reset_user)
2572{
2573 char alpha2[2];
Dmitry Shmidtcee0bec2011-12-19 12:32:21 -08002574 char world_alpha2[2];
Luis R. Rodriguez09d989d2010-01-29 19:58:57 -05002575 struct reg_beacon *reg_beacon, *btmp;
Luis R. Rodriguez14609552011-04-05 10:49:03 -07002576 LIST_HEAD(tmp_reg_req_list);
Rajkumar Manoharan5ce543d2011-12-07 21:50:08 +05302577 struct cfg80211_registered_device *rdev;
Luis R. Rodriguez09d989d2010-01-29 19:58:57 -05002578
Johannes Berg5fe231e2013-05-08 21:45:15 +02002579 ASSERT_RTNL();
2580
Ilan peer05050752015-03-04 00:32:06 -05002581 /*
2582 * Clear the indoor setting in case that it is not controlled by user
2583 * space, as otherwise there is no guarantee that the device is still
2584 * operating in an indoor environment.
2585 */
2586 spin_lock(&reg_indoor_lock);
2587 if (reg_is_indoor && !reg_is_indoor_portid) {
2588 reg_is_indoor = false;
2589 reg_check_channels();
2590 }
2591 spin_unlock(&reg_indoor_lock);
Ilan Peer52616f22014-02-25 16:26:00 +02002592
Johannes Berg2d319862013-01-09 12:01:38 +01002593 reset_regdomains(true, &world_regdom);
Luis R. Rodriguez09d989d2010-01-29 19:58:57 -05002594 restore_alpha2(alpha2, reset_user);
2595
Luis R. Rodriguez14609552011-04-05 10:49:03 -07002596 /*
2597 * If there's any pending requests we simply
2598 * stash them to a temporary pending queue and
2599 * add then after we've restored regulatory
2600 * settings.
2601 */
2602 spin_lock(&reg_requests_lock);
Ilan peereeca9fc2015-03-04 00:32:07 -05002603 list_splice_tail_init(&reg_requests_list, &tmp_reg_req_list);
Luis R. Rodriguez14609552011-04-05 10:49:03 -07002604 spin_unlock(&reg_requests_lock);
2605
Luis R. Rodriguez09d989d2010-01-29 19:58:57 -05002606 /* Clear beacon hints */
2607 spin_lock_bh(&reg_pending_beacons_lock);
Johannes Bergfea9bce2012-12-03 17:32:01 +01002608 list_for_each_entry_safe(reg_beacon, btmp, &reg_pending_beacons, list) {
2609 list_del(&reg_beacon->list);
2610 kfree(reg_beacon);
Luis R. Rodriguez09d989d2010-01-29 19:58:57 -05002611 }
2612 spin_unlock_bh(&reg_pending_beacons_lock);
2613
Johannes Bergfea9bce2012-12-03 17:32:01 +01002614 list_for_each_entry_safe(reg_beacon, btmp, &reg_beacon_list, list) {
2615 list_del(&reg_beacon->list);
2616 kfree(reg_beacon);
Luis R. Rodriguez09d989d2010-01-29 19:58:57 -05002617 }
2618
2619 /* First restore to the basic regulatory settings */
Johannes Berg379b82f2012-12-06 15:44:07 +01002620 world_alpha2[0] = cfg80211_world_regdom->alpha2[0];
2621 world_alpha2[1] = cfg80211_world_regdom->alpha2[1];
Luis R. Rodriguez09d989d2010-01-29 19:58:57 -05002622
Rajkumar Manoharan5ce543d2011-12-07 21:50:08 +05302623 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
Jonathan Doronb0d7aa52014-12-15 19:26:00 +02002624 if (rdev->wiphy.regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED)
2625 continue;
Luis R. Rodrigueza2f73b62013-11-11 22:15:29 +01002626 if (rdev->wiphy.regulatory_flags & REGULATORY_CUSTOM_REG)
Rajkumar Manoharan5ce543d2011-12-07 21:50:08 +05302627 restore_custom_reg_settings(&rdev->wiphy);
2628 }
2629
Dmitry Shmidtcee0bec2011-12-19 12:32:21 -08002630 regulatory_hint_core(world_alpha2);
Luis R. Rodriguez09d989d2010-01-29 19:58:57 -05002631
2632 /*
2633 * This restores the ieee80211_regdom module parameter
2634 * preference or the last user requested regulatory
2635 * settings, user regulatory settings takes precedence.
2636 */
2637 if (is_an_alpha2(alpha2))
Maciej S. Szmigiero549cc1c2015-09-02 19:00:31 +02002638 regulatory_hint_user(alpha2, NL80211_USER_REG_HINT_USER);
Luis R. Rodriguez09d989d2010-01-29 19:58:57 -05002639
Luis R. Rodriguez14609552011-04-05 10:49:03 -07002640 spin_lock(&reg_requests_lock);
Johannes Berg11cff962012-12-03 18:56:41 +01002641 list_splice_tail_init(&tmp_reg_req_list, &reg_requests_list);
Luis R. Rodriguez14609552011-04-05 10:49:03 -07002642 spin_unlock(&reg_requests_lock);
2643
Luis R. Rodriguez14609552011-04-05 10:49:03 -07002644 REG_DBG_PRINT("Kicking the queue\n");
2645
2646 schedule_work(&reg_work);
2647}
Luis R. Rodriguez09d989d2010-01-29 19:58:57 -05002648
2649void regulatory_hint_disconnect(void)
2650{
Johannes Berg1a919312012-12-03 17:21:11 +01002651 REG_DBG_PRINT("All devices are disconnected, going to restore regulatory settings\n");
Luis R. Rodriguez09d989d2010-01-29 19:58:57 -05002652 restore_regulatory_settings(false);
2653}
2654
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05002655static bool freq_is_chan_12_13_14(u16 freq)
2656{
Bruno Randolf59eb21a2011-01-17 13:37:28 +09002657 if (freq == ieee80211_channel_to_frequency(12, IEEE80211_BAND_2GHZ) ||
2658 freq == ieee80211_channel_to_frequency(13, IEEE80211_BAND_2GHZ) ||
2659 freq == ieee80211_channel_to_frequency(14, IEEE80211_BAND_2GHZ))
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05002660 return true;
2661 return false;
2662}
2663
Luis R. Rodriguez3ebfa6e2012-12-19 10:53:02 -08002664static bool pending_reg_beacon(struct ieee80211_channel *beacon_chan)
2665{
2666 struct reg_beacon *pending_beacon;
2667
2668 list_for_each_entry(pending_beacon, &reg_pending_beacons, list)
2669 if (beacon_chan->center_freq ==
2670 pending_beacon->chan.center_freq)
2671 return true;
2672 return false;
2673}
2674
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05002675int regulatory_hint_found_beacon(struct wiphy *wiphy,
2676 struct ieee80211_channel *beacon_chan,
2677 gfp_t gfp)
2678{
2679 struct reg_beacon *reg_beacon;
Luis R. Rodriguez3ebfa6e2012-12-19 10:53:02 -08002680 bool processing;
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05002681
Johannes Berg1a919312012-12-03 17:21:11 +01002682 if (beacon_chan->beacon_found ||
2683 beacon_chan->flags & IEEE80211_CHAN_RADAR ||
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05002684 (beacon_chan->band == IEEE80211_BAND_2GHZ &&
Johannes Berg1a919312012-12-03 17:21:11 +01002685 !freq_is_chan_12_13_14(beacon_chan->center_freq)))
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05002686 return 0;
2687
Luis R. Rodriguez3ebfa6e2012-12-19 10:53:02 -08002688 spin_lock_bh(&reg_pending_beacons_lock);
2689 processing = pending_reg_beacon(beacon_chan);
2690 spin_unlock_bh(&reg_pending_beacons_lock);
2691
2692 if (processing)
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05002693 return 0;
2694
2695 reg_beacon = kzalloc(sizeof(struct reg_beacon), gfp);
2696 if (!reg_beacon)
2697 return -ENOMEM;
2698
Johannes Berg1a919312012-12-03 17:21:11 +01002699 REG_DBG_PRINT("Found new beacon on frequency: %d MHz (Ch %d) on %s\n",
Luis R. Rodriguez4113f752010-01-04 11:50:11 -05002700 beacon_chan->center_freq,
2701 ieee80211_frequency_to_channel(beacon_chan->center_freq),
2702 wiphy_name(wiphy));
2703
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05002704 memcpy(&reg_beacon->chan, beacon_chan,
Johannes Berg1a919312012-12-03 17:21:11 +01002705 sizeof(struct ieee80211_channel));
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05002706
2707 /*
2708 * Since we can be called from BH or and non-BH context
2709 * we must use spin_lock_bh()
2710 */
2711 spin_lock_bh(&reg_pending_beacons_lock);
2712 list_add_tail(&reg_beacon->list, &reg_pending_beacons);
2713 spin_unlock_bh(&reg_pending_beacons_lock);
2714
2715 schedule_work(&reg_work);
2716
2717 return 0;
2718}
2719
Johannes Berga3d2eaf2008-09-15 11:10:52 +02002720static void print_rd_rules(const struct ieee80211_regdomain *rd)
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002721{
2722 unsigned int i;
Johannes Berga3d2eaf2008-09-15 11:10:52 +02002723 const struct ieee80211_reg_rule *reg_rule = NULL;
2724 const struct ieee80211_freq_range *freq_range = NULL;
2725 const struct ieee80211_power_rule *power_rule = NULL;
Janusz Dziedzic089027e2014-02-21 19:46:12 +01002726 char bw[32], cac_time[32];
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002727
Janusz Dziedzic089027e2014-02-21 19:46:12 +01002728 pr_info(" (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp), (dfs_cac_time)\n");
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002729
2730 for (i = 0; i < rd->n_reg_rules; i++) {
2731 reg_rule = &rd->reg_rules[i];
2732 freq_range = &reg_rule->freq_range;
2733 power_rule = &reg_rule->power_rule;
2734
Janusz Dziedzicb0dfd2e2014-02-20 13:52:16 +01002735 if (reg_rule->flags & NL80211_RRF_AUTO_BW)
2736 snprintf(bw, sizeof(bw), "%d KHz, %d KHz AUTO",
2737 freq_range->max_bandwidth_khz,
Janusz Dziedzic97524822014-01-30 09:52:20 +01002738 reg_get_max_bandwidth(rd, reg_rule));
2739 else
Janusz Dziedzicb0dfd2e2014-02-20 13:52:16 +01002740 snprintf(bw, sizeof(bw), "%d KHz",
Janusz Dziedzic97524822014-01-30 09:52:20 +01002741 freq_range->max_bandwidth_khz);
2742
Janusz Dziedzic089027e2014-02-21 19:46:12 +01002743 if (reg_rule->flags & NL80211_RRF_DFS)
2744 scnprintf(cac_time, sizeof(cac_time), "%u s",
2745 reg_rule->dfs_cac_ms/1000);
2746 else
2747 scnprintf(cac_time, sizeof(cac_time), "N/A");
2748
2749
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -05002750 /*
2751 * There may not be documentation for max antenna gain
2752 * in certain regions
2753 */
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002754 if (power_rule->max_antenna_gain)
Janusz Dziedzic089027e2014-02-21 19:46:12 +01002755 pr_info(" (%d KHz - %d KHz @ %s), (%d mBi, %d mBm), (%s)\n",
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002756 freq_range->start_freq_khz,
2757 freq_range->end_freq_khz,
Janusz Dziedzic97524822014-01-30 09:52:20 +01002758 bw,
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002759 power_rule->max_antenna_gain,
Janusz Dziedzic089027e2014-02-21 19:46:12 +01002760 power_rule->max_eirp,
2761 cac_time);
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002762 else
Janusz Dziedzic089027e2014-02-21 19:46:12 +01002763 pr_info(" (%d KHz - %d KHz @ %s), (N/A, %d mBm), (%s)\n",
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002764 freq_range->start_freq_khz,
2765 freq_range->end_freq_khz,
Janusz Dziedzic97524822014-01-30 09:52:20 +01002766 bw,
Janusz Dziedzic089027e2014-02-21 19:46:12 +01002767 power_rule->max_eirp,
2768 cac_time);
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002769 }
2770}
2771
Luis R. Rodriguez4c7d3982013-11-13 18:54:02 +01002772bool reg_supported_dfs_region(enum nl80211_dfs_regions dfs_region)
Luis R. Rodriguez8b60b072011-10-11 10:59:02 -07002773{
2774 switch (dfs_region) {
2775 case NL80211_DFS_UNSET:
2776 case NL80211_DFS_FCC:
2777 case NL80211_DFS_ETSI:
2778 case NL80211_DFS_JP:
2779 return true;
2780 default:
2781 REG_DBG_PRINT("Ignoring uknown DFS master region: %d\n",
2782 dfs_region);
2783 return false;
2784 }
2785}
2786
Johannes Berga3d2eaf2008-09-15 11:10:52 +02002787static void print_regdomain(const struct ieee80211_regdomain *rd)
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002788{
Johannes Bergc492db32012-12-06 16:29:25 +01002789 struct regulatory_request *lr = get_last_request();
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002790
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -08002791 if (is_intersected_alpha2(rd->alpha2)) {
Johannes Bergc492db32012-12-06 16:29:25 +01002792 if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) {
Johannes Berg79c97e92009-07-07 03:56:12 +02002793 struct cfg80211_registered_device *rdev;
Johannes Bergc492db32012-12-06 16:29:25 +01002794 rdev = cfg80211_rdev_by_wiphy_idx(lr->wiphy_idx);
Johannes Berg79c97e92009-07-07 03:56:12 +02002795 if (rdev) {
Joe Perchese9c02682010-11-16 19:56:49 -08002796 pr_info("Current regulatory domain updated by AP to: %c%c\n",
Johannes Berg79c97e92009-07-07 03:56:12 +02002797 rdev->country_ie_alpha2[0],
2798 rdev->country_ie_alpha2[1]);
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -08002799 } else
Joe Perchese9c02682010-11-16 19:56:49 -08002800 pr_info("Current regulatory domain intersected:\n");
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -08002801 } else
Joe Perchese9c02682010-11-16 19:56:49 -08002802 pr_info("Current regulatory domain intersected:\n");
Johannes Berg1a919312012-12-03 17:21:11 +01002803 } else if (is_world_regdom(rd->alpha2)) {
Joe Perchese9c02682010-11-16 19:56:49 -08002804 pr_info("World regulatory domain updated:\n");
Johannes Berg1a919312012-12-03 17:21:11 +01002805 } else {
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002806 if (is_unknown_alpha2(rd->alpha2))
Joe Perchese9c02682010-11-16 19:56:49 -08002807 pr_info("Regulatory domain changed to driver built-in settings (unknown country)\n");
Luis R. Rodriguez57b5ce02012-07-12 11:49:18 -07002808 else {
Johannes Bergc492db32012-12-06 16:29:25 +01002809 if (reg_request_cell_base(lr))
Johannes Berg1a919312012-12-03 17:21:11 +01002810 pr_info("Regulatory domain changed to country: %c%c by Cell Station\n",
Luis R. Rodriguez57b5ce02012-07-12 11:49:18 -07002811 rd->alpha2[0], rd->alpha2[1]);
2812 else
Johannes Berg1a919312012-12-03 17:21:11 +01002813 pr_info("Regulatory domain changed to country: %c%c\n",
Luis R. Rodriguez57b5ce02012-07-12 11:49:18 -07002814 rd->alpha2[0], rd->alpha2[1]);
2815 }
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002816 }
Johannes Berg1a919312012-12-03 17:21:11 +01002817
Luis R. Rodriguez3ef121b2013-11-13 18:54:05 +01002818 pr_info(" DFS Master region: %s", reg_dfs_region_str(rd->dfs_region));
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002819 print_rd_rules(rd);
2820}
2821
Johannes Berg2df78162008-10-28 16:49:41 +01002822static void print_regdomain_info(const struct ieee80211_regdomain *rd)
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002823{
Joe Perchese9c02682010-11-16 19:56:49 -08002824 pr_info("Regulatory domain: %c%c\n", rd->alpha2[0], rd->alpha2[1]);
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002825 print_rd_rules(rd);
2826}
2827
Luis R. Rodriguez3b9e5ac2013-11-05 09:18:14 -08002828static int reg_set_rd_core(const struct ieee80211_regdomain *rd)
2829{
2830 if (!is_world_regdom(rd->alpha2))
2831 return -EINVAL;
2832 update_world_regdomain(rd);
2833 return 0;
2834}
2835
Luis R. Rodriguez84721d42013-11-05 09:18:15 -08002836static int reg_set_rd_user(const struct ieee80211_regdomain *rd,
2837 struct regulatory_request *user_request)
2838{
2839 const struct ieee80211_regdomain *intersected_rd = NULL;
2840
Luis R. Rodriguez84721d42013-11-05 09:18:15 -08002841 if (!regdom_changes(rd->alpha2))
2842 return -EALREADY;
2843
2844 if (!is_valid_rd(rd)) {
2845 pr_err("Invalid regulatory domain detected:\n");
2846 print_regdomain_info(rd);
2847 return -EINVAL;
2848 }
2849
2850 if (!user_request->intersect) {
2851 reset_regdomains(false, rd);
2852 return 0;
2853 }
2854
2855 intersected_rd = regdom_intersect(rd, get_cfg80211_regdom());
2856 if (!intersected_rd)
2857 return -EINVAL;
2858
2859 kfree(rd);
2860 rd = NULL;
2861 reset_regdomains(false, intersected_rd);
2862
2863 return 0;
2864}
2865
Luis R. Rodriguezf5fe3242013-11-05 09:18:16 -08002866static int reg_set_rd_driver(const struct ieee80211_regdomain *rd,
2867 struct regulatory_request *driver_request)
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002868{
Johannes Berge9763c32012-12-03 16:59:46 +01002869 const struct ieee80211_regdomain *regd;
Luis R. Rodriguez9c964772008-10-30 13:33:53 -07002870 const struct ieee80211_regdomain *intersected_rd = NULL;
Luis R. Rodriguezf5fe3242013-11-05 09:18:16 -08002871 const struct ieee80211_regdomain *tmp;
Luis R. Rodriguez806a9e32009-02-21 00:04:26 -05002872 struct wiphy *request_wiphy;
Johannes Berg6913b492012-12-04 00:48:59 +01002873
Luis R. Rodriguezf5fe3242013-11-05 09:18:16 -08002874 if (is_world_regdom(rd->alpha2))
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002875 return -EINVAL;
2876
Luis R. Rodriguezf5fe3242013-11-05 09:18:16 -08002877 if (!regdom_changes(rd->alpha2))
2878 return -EALREADY;
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002879
Luis R. Rodriguez8375af32008-11-12 14:21:57 -08002880 if (!is_valid_rd(rd)) {
Joe Perchese9c02682010-11-16 19:56:49 -08002881 pr_err("Invalid regulatory domain detected:\n");
Luis R. Rodriguez8375af32008-11-12 14:21:57 -08002882 print_regdomain_info(rd);
2883 return -EINVAL;
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002884 }
2885
Luis R. Rodriguezf5fe3242013-11-05 09:18:16 -08002886 request_wiphy = wiphy_idx_to_wiphy(driver_request->wiphy_idx);
2887 if (!request_wiphy) {
Shaibal Dutta845f3352014-01-30 15:08:30 -08002888 queue_delayed_work(system_power_efficient_wq,
2889 &reg_timeout, 0);
Johannes Bergde3584b2011-11-21 10:44:00 +01002890 return -ENODEV;
2891 }
Luis R. Rodriguez806a9e32009-02-21 00:04:26 -05002892
Luis R. Rodriguezf5fe3242013-11-05 09:18:16 -08002893 if (!driver_request->intersect) {
Luis R. Rodriguez558f6d32009-06-08 18:54:37 -07002894 if (request_wiphy->regd)
2895 return -EALREADY;
Luis R. Rodriguez3e0c3ff2009-01-07 17:43:34 -08002896
Johannes Berge9763c32012-12-03 16:59:46 +01002897 regd = reg_copy_regd(rd);
2898 if (IS_ERR(regd))
2899 return PTR_ERR(regd);
Luis R. Rodriguez3e0c3ff2009-01-07 17:43:34 -08002900
Johannes Berg458f4f92012-12-06 15:47:38 +01002901 rcu_assign_pointer(request_wiphy->regd, regd);
Johannes Berg379b82f2012-12-06 15:44:07 +01002902 reset_regdomains(false, rd);
Luis R. Rodriguezb8295ac2008-11-12 14:21:58 -08002903 return 0;
2904 }
2905
Luis R. Rodriguezf5fe3242013-11-05 09:18:16 -08002906 intersected_rd = regdom_intersect(rd, get_cfg80211_regdom());
2907 if (!intersected_rd)
2908 return -EINVAL;
Luis R. Rodriguezb8295ac2008-11-12 14:21:58 -08002909
Luis R. Rodriguezf5fe3242013-11-05 09:18:16 -08002910 /*
2911 * We can trash what CRDA provided now.
2912 * However if a driver requested this specific regulatory
2913 * domain we keep it for its private use
2914 */
2915 tmp = get_wiphy_regdom(request_wiphy);
2916 rcu_assign_pointer(request_wiphy->regd, rd);
2917 rcu_free_regdom(tmp);
Luis R. Rodriguezb8295ac2008-11-12 14:21:58 -08002918
Luis R. Rodriguezf5fe3242013-11-05 09:18:16 -08002919 rd = NULL;
Larry Fingerb7566fc2013-02-04 15:33:44 -06002920
Luis R. Rodriguezf5fe3242013-11-05 09:18:16 -08002921 reset_regdomains(false, intersected_rd);
Luis R. Rodriguez3e0c3ff2009-01-07 17:43:34 -08002922
Luis R. Rodriguezf5fe3242013-11-05 09:18:16 -08002923 return 0;
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002924}
2925
Luis R. Rodriguez01992402013-11-05 09:18:17 -08002926static int reg_set_rd_country_ie(const struct ieee80211_regdomain *rd,
2927 struct regulatory_request *country_ie_request)
Luis R. Rodriguezf5fe3242013-11-05 09:18:16 -08002928{
2929 struct wiphy *request_wiphy;
2930
2931 if (!is_alpha2_set(rd->alpha2) && !is_an_alpha2(rd->alpha2) &&
2932 !is_unknown_alpha2(rd->alpha2))
2933 return -EINVAL;
2934
2935 /*
2936 * Lets only bother proceeding on the same alpha2 if the current
2937 * rd is non static (it means CRDA was present and was used last)
2938 * and the pending request came in from a country IE
2939 */
2940
2941 if (!is_valid_rd(rd)) {
2942 pr_err("Invalid regulatory domain detected:\n");
2943 print_regdomain_info(rd);
2944 return -EINVAL;
2945 }
2946
Luis R. Rodriguez01992402013-11-05 09:18:17 -08002947 request_wiphy = wiphy_idx_to_wiphy(country_ie_request->wiphy_idx);
Luis R. Rodriguezf5fe3242013-11-05 09:18:16 -08002948 if (!request_wiphy) {
Shaibal Dutta845f3352014-01-30 15:08:30 -08002949 queue_delayed_work(system_power_efficient_wq,
2950 &reg_timeout, 0);
Luis R. Rodriguezf5fe3242013-11-05 09:18:16 -08002951 return -ENODEV;
2952 }
2953
Luis R. Rodriguez01992402013-11-05 09:18:17 -08002954 if (country_ie_request->intersect)
Luis R. Rodriguezf5fe3242013-11-05 09:18:16 -08002955 return -EINVAL;
2956
2957 reset_regdomains(false, rd);
2958 return 0;
2959}
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002960
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -05002961/*
2962 * Use this call to set the current regulatory domain. Conflicts with
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002963 * multiple drivers can be ironed out later. Caller must've already
Johannes Berg458f4f92012-12-06 15:47:38 +01002964 * kmalloc'd the rd structure.
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -05002965 */
Ilan peerc37722b2015-03-30 15:15:49 +03002966int set_regdom(const struct ieee80211_regdomain *rd,
2967 enum ieee80211_regd_source regd_src)
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002968{
Johannes Bergc492db32012-12-06 16:29:25 +01002969 struct regulatory_request *lr;
Janusz Dziedzic092008a2014-02-14 08:54:00 +01002970 bool user_reset = false;
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002971 int r;
2972
Luis R. Rodriguez3b9e5ac2013-11-05 09:18:14 -08002973 if (!reg_is_valid_request(rd->alpha2)) {
2974 kfree(rd);
2975 return -EINVAL;
2976 }
2977
Ilan peerc37722b2015-03-30 15:15:49 +03002978 if (regd_src == REGD_SOURCE_CRDA)
2979 reg_crda_timeouts = 0;
2980
Johannes Bergc492db32012-12-06 16:29:25 +01002981 lr = get_last_request();
Luis R. Rodriguezabc73812009-07-30 17:38:08 -07002982
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002983 /* Note that this doesn't update the wiphys, this is done below */
Luis R. Rodriguez3b9e5ac2013-11-05 09:18:14 -08002984 switch (lr->initiator) {
2985 case NL80211_REGDOM_SET_BY_CORE:
2986 r = reg_set_rd_core(rd);
2987 break;
2988 case NL80211_REGDOM_SET_BY_USER:
Luis R. Rodriguez84721d42013-11-05 09:18:15 -08002989 r = reg_set_rd_user(rd, lr);
Janusz Dziedzic092008a2014-02-14 08:54:00 +01002990 user_reset = true;
Luis R. Rodriguez84721d42013-11-05 09:18:15 -08002991 break;
Luis R. Rodriguez3b9e5ac2013-11-05 09:18:14 -08002992 case NL80211_REGDOM_SET_BY_DRIVER:
Luis R. Rodriguezf5fe3242013-11-05 09:18:16 -08002993 r = reg_set_rd_driver(rd, lr);
2994 break;
Luis R. Rodriguez3b9e5ac2013-11-05 09:18:14 -08002995 case NL80211_REGDOM_SET_BY_COUNTRY_IE:
Luis R. Rodriguez01992402013-11-05 09:18:17 -08002996 r = reg_set_rd_country_ie(rd, lr);
Luis R. Rodriguez3b9e5ac2013-11-05 09:18:14 -08002997 break;
2998 default:
2999 WARN(1, "invalid initiator %d\n", lr->initiator);
3000 return -EINVAL;
3001 }
3002
Johannes Bergd2372b32008-10-24 20:32:20 +02003003 if (r) {
Janusz Dziedzic092008a2014-02-14 08:54:00 +01003004 switch (r) {
3005 case -EALREADY:
Kalle Valo95908532012-07-12 15:33:58 +03003006 reg_set_request_processed();
Janusz Dziedzic092008a2014-02-14 08:54:00 +01003007 break;
3008 default:
3009 /* Back to world regulatory in case of errors */
3010 restore_regulatory_settings(user_reset);
3011 }
Kalle Valo95908532012-07-12 15:33:58 +03003012
Johannes Bergd2372b32008-10-24 20:32:20 +02003013 kfree(rd);
Johannes Berg38fd2142013-05-10 19:17:17 +02003014 return r;
Johannes Bergd2372b32008-10-24 20:32:20 +02003015 }
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07003016
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07003017 /* This would make this whole thing pointless */
Johannes Berg38fd2142013-05-10 19:17:17 +02003018 if (WARN_ON(!lr->intersect && rd != get_cfg80211_regdom()))
3019 return -EINVAL;
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07003020
3021 /* update all wiphys now with the new established regulatory domain */
Johannes Bergc492db32012-12-06 16:29:25 +01003022 update_all_wiphy_regulatory(lr->initiator);
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07003023
Johannes Berg458f4f92012-12-06 15:47:38 +01003024 print_regdomain(get_cfg80211_regdom());
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07003025
Johannes Bergc492db32012-12-06 16:29:25 +01003026 nl80211_send_reg_change_event(lr);
Luis R. Rodriguez73d54c92009-03-09 22:07:42 -04003027
Luis R. Rodriguezb2e253c2010-11-17 21:46:09 -08003028 reg_set_request_processed();
3029
Johannes Berg38fd2142013-05-10 19:17:17 +02003030 return 0;
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07003031}
3032
Arik Nemtsov2c3e8612015-01-07 16:47:19 +02003033static int __regulatory_set_wiphy_regd(struct wiphy *wiphy,
3034 struct ieee80211_regdomain *rd)
Jonathan Doronb0d7aa52014-12-15 19:26:00 +02003035{
3036 const struct ieee80211_regdomain *regd;
3037 const struct ieee80211_regdomain *prev_regd;
3038 struct cfg80211_registered_device *rdev;
3039
3040 if (WARN_ON(!wiphy || !rd))
3041 return -EINVAL;
3042
3043 if (WARN(!(wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED),
3044 "wiphy should have REGULATORY_WIPHY_SELF_MANAGED\n"))
3045 return -EPERM;
3046
3047 if (WARN(!is_valid_rd(rd), "Invalid regulatory domain detected\n")) {
3048 print_regdomain_info(rd);
3049 return -EINVAL;
3050 }
3051
3052 regd = reg_copy_regd(rd);
3053 if (IS_ERR(regd))
3054 return PTR_ERR(regd);
3055
3056 rdev = wiphy_to_rdev(wiphy);
3057
3058 spin_lock(&reg_requests_lock);
3059 prev_regd = rdev->requested_regd;
3060 rdev->requested_regd = regd;
3061 spin_unlock(&reg_requests_lock);
3062
3063 kfree(prev_regd);
Arik Nemtsov2c3e8612015-01-07 16:47:19 +02003064 return 0;
3065}
3066
3067int regulatory_set_wiphy_regd(struct wiphy *wiphy,
3068 struct ieee80211_regdomain *rd)
3069{
3070 int ret = __regulatory_set_wiphy_regd(wiphy, rd);
3071
3072 if (ret)
3073 return ret;
Jonathan Doronb0d7aa52014-12-15 19:26:00 +02003074
3075 schedule_work(&reg_work);
3076 return 0;
3077}
3078EXPORT_SYMBOL(regulatory_set_wiphy_regd);
3079
Arik Nemtsov2c3e8612015-01-07 16:47:19 +02003080int regulatory_set_wiphy_regd_sync_rtnl(struct wiphy *wiphy,
3081 struct ieee80211_regdomain *rd)
3082{
3083 int ret;
3084
3085 ASSERT_RTNL();
3086
3087 ret = __regulatory_set_wiphy_regd(wiphy, rd);
3088 if (ret)
3089 return ret;
3090
3091 /* process the request immediately */
3092 reg_process_self_managed_hints();
3093 return 0;
3094}
3095EXPORT_SYMBOL(regulatory_set_wiphy_regd_sync_rtnl);
3096
Luis R. Rodriguez57b5ce02012-07-12 11:49:18 -07003097void wiphy_regulatory_register(struct wiphy *wiphy)
3098{
Arik Nemtsov23df0b72013-07-21 16:36:48 +03003099 struct regulatory_request *lr;
3100
Jonathan Doronb0d7aa52014-12-15 19:26:00 +02003101 /* self-managed devices ignore external hints */
3102 if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED)
3103 wiphy->regulatory_flags |= REGULATORY_DISABLE_BEACON_HINTS |
3104 REGULATORY_COUNTRY_IE_IGNORE;
3105
Luis R. Rodriguez57b5ce02012-07-12 11:49:18 -07003106 if (!reg_dev_ignore_cell_hint(wiphy))
3107 reg_num_devs_support_basehint++;
3108
Arik Nemtsov23df0b72013-07-21 16:36:48 +03003109 lr = get_last_request();
3110 wiphy_update_regulatory(wiphy, lr->initiator);
Luis R. Rodriguez57b5ce02012-07-12 11:49:18 -07003111}
3112
Luis R. Rodriguezbfead082012-07-12 11:49:19 -07003113void wiphy_regulatory_deregister(struct wiphy *wiphy)
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -08003114{
Luis R. Rodriguez0ad8aca2009-03-24 21:21:08 -04003115 struct wiphy *request_wiphy = NULL;
Johannes Bergc492db32012-12-06 16:29:25 +01003116 struct regulatory_request *lr;
Luis R. Rodriguez761cf7e2009-02-21 00:04:25 -05003117
Johannes Bergc492db32012-12-06 16:29:25 +01003118 lr = get_last_request();
Luis R. Rodriguezabc73812009-07-30 17:38:08 -07003119
Luis R. Rodriguez57b5ce02012-07-12 11:49:18 -07003120 if (!reg_dev_ignore_cell_hint(wiphy))
3121 reg_num_devs_support_basehint--;
3122
Johannes Berg458f4f92012-12-06 15:47:38 +01003123 rcu_free_regdom(get_wiphy_regdom(wiphy));
Monam Agarwal34dd8862014-03-24 00:53:40 +05303124 RCU_INIT_POINTER(wiphy->regd, NULL);
Chris Wright0ef9ccd2009-04-24 14:09:31 -07003125
Johannes Bergc492db32012-12-06 16:29:25 +01003126 if (lr)
3127 request_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx);
Luis R. Rodriguez806a9e32009-02-21 00:04:26 -05003128
Chris Wright0ef9ccd2009-04-24 14:09:31 -07003129 if (!request_wiphy || request_wiphy != wiphy)
Johannes Berg38fd2142013-05-10 19:17:17 +02003130 return;
Chris Wright0ef9ccd2009-04-24 14:09:31 -07003131
Johannes Bergc492db32012-12-06 16:29:25 +01003132 lr->wiphy_idx = WIPHY_IDX_INVALID;
3133 lr->country_ie_env = ENVIRON_ANY;
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -08003134}
3135
Luis R. Rodrigueza90c7a32011-04-05 10:49:04 -07003136static void reg_timeout_work(struct work_struct *work)
3137{
Johannes Berg1a919312012-12-03 17:21:11 +01003138 REG_DBG_PRINT("Timeout while waiting for CRDA to reply, restoring regulatory settings\n");
Johannes Bergf77b86d2013-06-24 15:43:38 +02003139 rtnl_lock();
Ilan peerc37722b2015-03-30 15:15:49 +03003140 reg_crda_timeouts++;
Luis R. Rodrigueza90c7a32011-04-05 10:49:04 -07003141 restore_regulatory_settings(true);
Johannes Bergf77b86d2013-06-24 15:43:38 +02003142 rtnl_unlock();
Luis R. Rodrigueza90c7a32011-04-05 10:49:04 -07003143}
3144
Ilan Peer174e0cd2014-02-23 09:13:01 +02003145/*
3146 * See http://www.fcc.gov/document/5-ghz-unlicensed-spectrum-unii, for
3147 * UNII band definitions
3148 */
3149int cfg80211_get_unii(int freq)
3150{
3151 /* UNII-1 */
3152 if (freq >= 5150 && freq <= 5250)
3153 return 0;
3154
3155 /* UNII-2A */
3156 if (freq > 5250 && freq <= 5350)
3157 return 1;
3158
3159 /* UNII-2B */
3160 if (freq > 5350 && freq <= 5470)
3161 return 2;
3162
3163 /* UNII-2C */
3164 if (freq > 5470 && freq <= 5725)
3165 return 3;
3166
3167 /* UNII-3 */
3168 if (freq > 5725 && freq <= 5825)
3169 return 4;
3170
3171 return -EINVAL;
3172}
3173
Ilan Peerc8866e52014-02-23 09:13:03 +02003174bool regulatory_indoor_allowed(void)
3175{
3176 return reg_is_indoor;
3177}
3178
Uwe Kleine-König2fcc9f72010-06-18 09:38:55 +02003179int __init regulatory_init(void)
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07003180{
Luis R. Rodriguezbcf4f992009-02-21 00:04:24 -05003181 int err = 0;
Johannes Berg734366d2008-09-15 10:56:48 +02003182
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07003183 reg_pdev = platform_device_register_simple("regulatory", 0, NULL, 0);
3184 if (IS_ERR(reg_pdev))
3185 return PTR_ERR(reg_pdev);
Johannes Berg734366d2008-09-15 10:56:48 +02003186
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05003187 spin_lock_init(&reg_requests_lock);
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05003188 spin_lock_init(&reg_pending_beacons_lock);
Ilan peer05050752015-03-04 00:32:06 -05003189 spin_lock_init(&reg_indoor_lock);
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05003190
Luis R. Rodriguez80007ef2012-03-23 07:23:31 -07003191 reg_regdb_size_check();
3192
Johannes Berg458f4f92012-12-06 15:47:38 +01003193 rcu_assign_pointer(cfg80211_regdomain, cfg80211_world_regdom);
Johannes Berg734366d2008-09-15 10:56:48 +02003194
Luis R. Rodriguez09d989d2010-01-29 19:58:57 -05003195 user_alpha2[0] = '9';
3196 user_alpha2[1] = '7';
3197
Luis R. Rodriguezae9e4b02009-07-14 20:23:15 -04003198 /* We always try to get an update for the static regdomain */
Johannes Berg458f4f92012-12-06 15:47:38 +01003199 err = regulatory_hint_core(cfg80211_world_regdom->alpha2);
Luis R. Rodriguezbcf4f992009-02-21 00:04:24 -05003200 if (err) {
3201 if (err == -ENOMEM)
3202 return err;
3203 /*
3204 * N.B. kobject_uevent_env() can fail mainly for when we're out
3205 * memory which is handled and propagated appropriately above
3206 * but it can also fail during a netlink_broadcast() or during
3207 * early boot for call_usermodehelper(). For now treat these
3208 * errors as non-fatal.
3209 */
Joe Perchese9c02682010-11-16 19:56:49 -08003210 pr_err("kobject_uevent_env() was unable to call CRDA during init\n");
Luis R. Rodriguezbcf4f992009-02-21 00:04:24 -05003211 }
Johannes Berg734366d2008-09-15 10:56:48 +02003212
Luis R. Rodriguezae9e4b02009-07-14 20:23:15 -04003213 /*
3214 * Finally, if the user set the module parameter treat it
3215 * as a user hint.
3216 */
3217 if (!is_world_regdom(ieee80211_regdom))
Luis R. Rodriguez57b5ce02012-07-12 11:49:18 -07003218 regulatory_hint_user(ieee80211_regdom,
3219 NL80211_USER_REG_HINT_USER);
Luis R. Rodriguezae9e4b02009-07-14 20:23:15 -04003220
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07003221 return 0;
3222}
3223
Johannes Berg1a919312012-12-03 17:21:11 +01003224void regulatory_exit(void)
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07003225{
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05003226 struct regulatory_request *reg_request, *tmp;
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05003227 struct reg_beacon *reg_beacon, *btmp;
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05003228
3229 cancel_work_sync(&reg_work);
Luis R. Rodrigueza90c7a32011-04-05 10:49:04 -07003230 cancel_delayed_work_sync(&reg_timeout);
Arik Nemtsovad932f02014-11-27 09:44:55 +02003231 cancel_delayed_work_sync(&reg_check_chans);
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05003232
Johannes Berg9027b142012-12-03 17:59:24 +01003233 /* Lock to suppress warnings */
Johannes Berg38fd2142013-05-10 19:17:17 +02003234 rtnl_lock();
Johannes Berg379b82f2012-12-06 15:44:07 +01003235 reset_regdomains(true, NULL);
Johannes Berg38fd2142013-05-10 19:17:17 +02003236 rtnl_unlock();
Johannes Berg734366d2008-09-15 10:56:48 +02003237
Luis R. Rodriguez58ebacc2011-11-08 14:28:06 -08003238 dev_set_uevent_suppress(&reg_pdev->dev, true);
Johannes Bergf6037d02008-10-21 11:01:33 +02003239
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07003240 platform_device_unregister(reg_pdev);
Johannes Berg734366d2008-09-15 10:56:48 +02003241
Johannes Bergfea9bce2012-12-03 17:32:01 +01003242 list_for_each_entry_safe(reg_beacon, btmp, &reg_pending_beacons, list) {
3243 list_del(&reg_beacon->list);
3244 kfree(reg_beacon);
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05003245 }
3246
Johannes Bergfea9bce2012-12-03 17:32:01 +01003247 list_for_each_entry_safe(reg_beacon, btmp, &reg_beacon_list, list) {
3248 list_del(&reg_beacon->list);
3249 kfree(reg_beacon);
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05003250 }
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05003251
Johannes Bergfea9bce2012-12-03 17:32:01 +01003252 list_for_each_entry_safe(reg_request, tmp, &reg_requests_list, list) {
3253 list_del(&reg_request->list);
3254 kfree(reg_request);
Johannes Berg8318d782008-01-24 19:38:38 +01003255 }
Johannes Berg8318d782008-01-24 19:38:38 +01003256}