blob: e4a0582370ccb99061a76b7c8bfec563f7d7b3ee [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
456struct reg_regdb_search_request {
457 char alpha2[2];
458 struct list_head list;
459};
460
461static LIST_HEAD(reg_regdb_search_list);
John W. Linville368d06f2010-03-16 15:40:59 -0400462static DEFINE_MUTEX(reg_regdb_search_mutex);
John W. Linville3b377ea2009-12-18 17:59:01 -0500463
464static void reg_regdb_search(struct work_struct *work)
465{
466 struct reg_regdb_search_request *request;
Johannes Berge9763c32012-12-03 16:59:46 +0100467 const struct ieee80211_regdomain *curdom, *regdom = NULL;
468 int i;
Luis R. Rodrigueza85d0d72012-09-14 15:36:57 -0700469
Johannes Berg5fe231e2013-05-08 21:45:15 +0200470 rtnl_lock();
John W. Linville3b377ea2009-12-18 17:59:01 -0500471
John W. Linville368d06f2010-03-16 15:40:59 -0400472 mutex_lock(&reg_regdb_search_mutex);
John W. Linville3b377ea2009-12-18 17:59:01 -0500473 while (!list_empty(&reg_regdb_search_list)) {
474 request = list_first_entry(&reg_regdb_search_list,
475 struct reg_regdb_search_request,
476 list);
477 list_del(&request->list);
478
Johannes Berg1a919312012-12-03 17:21:11 +0100479 for (i = 0; i < reg_regdb_size; i++) {
John W. Linville3b377ea2009-12-18 17:59:01 -0500480 curdom = reg_regdb[i];
481
Johannes Berg1a919312012-12-03 17:21:11 +0100482 if (alpha2_equal(request->alpha2, curdom->alpha2)) {
Johannes Berge9763c32012-12-03 16:59:46 +0100483 regdom = reg_copy_regd(curdom);
John W. Linville3b377ea2009-12-18 17:59:01 -0500484 break;
485 }
486 }
487
488 kfree(request);
489 }
John W. Linville368d06f2010-03-16 15:40:59 -0400490 mutex_unlock(&reg_regdb_search_mutex);
Luis R. Rodrigueza85d0d72012-09-14 15:36:57 -0700491
Johannes Berge9763c32012-12-03 16:59:46 +0100492 if (!IS_ERR_OR_NULL(regdom))
Ilan peerc37722b2015-03-30 15:15:49 +0300493 set_regdom(regdom, REGD_SOURCE_INTERNAL_DB);
Luis R. Rodrigueza85d0d72012-09-14 15:36:57 -0700494
Johannes Berg5fe231e2013-05-08 21:45:15 +0200495 rtnl_unlock();
John W. Linville3b377ea2009-12-18 17:59:01 -0500496}
497
498static DECLARE_WORK(reg_regdb_work, reg_regdb_search);
499
500static void reg_regdb_query(const char *alpha2)
501{
502 struct reg_regdb_search_request *request;
503
John W. Linville3b377ea2009-12-18 17:59:01 -0500504 request = kzalloc(sizeof(struct reg_regdb_search_request), GFP_KERNEL);
505 if (!request)
506 return;
507
508 memcpy(request->alpha2, alpha2, 2);
509
John W. Linville368d06f2010-03-16 15:40:59 -0400510 mutex_lock(&reg_regdb_search_mutex);
John W. Linville3b377ea2009-12-18 17:59:01 -0500511 list_add_tail(&request->list, &reg_regdb_search_list);
John W. Linville368d06f2010-03-16 15:40:59 -0400512 mutex_unlock(&reg_regdb_search_mutex);
John W. Linville3b377ea2009-12-18 17:59:01 -0500513
514 schedule_work(&reg_regdb_work);
515}
Luis R. Rodriguez80007ef2012-03-23 07:23:31 -0700516
517/* Feel free to add any other sanity checks here */
518static void reg_regdb_size_check(void)
519{
520 /* We should ideally BUILD_BUG_ON() but then random builds would fail */
521 WARN_ONCE(!reg_regdb_size, "db.txt is empty, you should update it...");
522}
John W. Linville3b377ea2009-12-18 17:59:01 -0500523#else
Luis R. Rodriguez80007ef2012-03-23 07:23:31 -0700524static inline void reg_regdb_size_check(void) {}
John W. Linville3b377ea2009-12-18 17:59:01 -0500525static inline void reg_regdb_query(const char *alpha2) {}
526#endif /* CONFIG_CFG80211_INTERNAL_REGDB */
527
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -0500528/*
529 * This lets us keep regulatory code which is updated on a regulatory
Johannes Berg1226d252014-02-25 15:43:36 +0100530 * basis in userspace.
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -0500531 */
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700532static int call_crda(const char *alpha2)
533{
Johannes Berg1226d252014-02-25 15:43:36 +0100534 char country[12];
535 char *env[] = { country, NULL };
536
537 snprintf(country, sizeof(country), "COUNTRY=%c%c",
538 alpha2[0], alpha2[1]);
539
Ilan peerc37722b2015-03-30 15:15:49 +0300540 /* query internal regulatory database (if it exists) */
541 reg_regdb_query(alpha2);
542
543 if (reg_crda_timeouts > REG_MAX_CRDA_TIMEOUTS) {
Thomas Petazzoni042ab5f2015-07-09 15:35:15 +0200544 pr_debug("Exceeded CRDA call max attempts. Not calling CRDA\n");
Ilan peerc37722b2015-03-30 15:15:49 +0300545 return -EINVAL;
546 }
547
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700548 if (!is_world_regdom((char *) alpha2))
Thomas Petazzoni042ab5f2015-07-09 15:35:15 +0200549 pr_debug("Calling CRDA for country: %c%c\n",
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700550 alpha2[0], alpha2[1]);
551 else
Thomas Petazzoni042ab5f2015-07-09 15:35:15 +0200552 pr_debug("Calling CRDA to update world regulatory domain\n");
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700553
Johannes Berg1226d252014-02-25 15:43:36 +0100554 return kobject_uevent_env(&reg_pdev->dev.kobj, KOBJ_CHANGE, env);
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700555}
556
Johannes Berg25b20db2015-10-15 12:05:05 +0200557static bool reg_call_crda(struct regulatory_request *request)
Luis R. Rodriguezfe6631f2013-11-05 09:18:10 -0800558{
559 if (call_crda(request->alpha2))
Johannes Berg25b20db2015-10-15 12:05:05 +0200560 return false;
Ilan peereeca9fc2015-03-04 00:32:07 -0500561
562 queue_delayed_work(system_power_efficient_wq,
563 &reg_timeout, msecs_to_jiffies(3142));
Johannes Berg25b20db2015-10-15 12:05:05 +0200564 return true;
Luis R. Rodriguezfe6631f2013-11-05 09:18:10 -0800565}
566
Luis R. Rodrigueze4387682013-11-05 09:18:01 -0800567bool reg_is_valid_request(const char *alpha2)
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700568{
Johannes Bergc492db32012-12-06 16:29:25 +0100569 struct regulatory_request *lr = get_last_request();
Luis R. Rodriguez61405e92009-05-13 17:04:41 -0400570
Johannes Bergc492db32012-12-06 16:29:25 +0100571 if (!lr || lr->processed)
Johannes Bergf6037d02008-10-21 11:01:33 +0200572 return false;
573
Johannes Bergc492db32012-12-06 16:29:25 +0100574 return alpha2_equal(lr->alpha2, alpha2);
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700575}
576
Janusz Dziedzice3961af2014-01-25 11:24:11 +0100577static const struct ieee80211_regdomain *reg_get_regdomain(struct wiphy *wiphy)
578{
579 struct regulatory_request *lr = get_last_request();
580
581 /*
582 * Follow the driver's regulatory domain, if present, unless a country
583 * IE has been processed or a user wants to help complaince further
584 */
585 if (lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE &&
586 lr->initiator != NL80211_REGDOM_SET_BY_USER &&
587 wiphy->regd)
588 return get_wiphy_regdom(wiphy);
589
590 return get_cfg80211_regdom();
591}
592
Arik Nemtsova6d4a532014-10-23 09:37:33 +0300593static unsigned int
594reg_get_max_bandwidth_from_range(const struct ieee80211_regdomain *rd,
595 const struct ieee80211_reg_rule *rule)
Janusz Dziedzic97524822014-01-30 09:52:20 +0100596{
597 const struct ieee80211_freq_range *freq_range = &rule->freq_range;
598 const struct ieee80211_freq_range *freq_range_tmp;
599 const struct ieee80211_reg_rule *tmp;
600 u32 start_freq, end_freq, idx, no;
601
602 for (idx = 0; idx < rd->n_reg_rules; idx++)
603 if (rule == &rd->reg_rules[idx])
604 break;
605
606 if (idx == rd->n_reg_rules)
607 return 0;
608
609 /* get start_freq */
610 no = idx;
611
612 while (no) {
613 tmp = &rd->reg_rules[--no];
614 freq_range_tmp = &tmp->freq_range;
615
616 if (freq_range_tmp->end_freq_khz < freq_range->start_freq_khz)
617 break;
618
Janusz Dziedzic97524822014-01-30 09:52:20 +0100619 freq_range = freq_range_tmp;
620 }
621
622 start_freq = freq_range->start_freq_khz;
623
624 /* get end_freq */
625 freq_range = &rule->freq_range;
626 no = idx;
627
628 while (no < rd->n_reg_rules - 1) {
629 tmp = &rd->reg_rules[++no];
630 freq_range_tmp = &tmp->freq_range;
631
632 if (freq_range_tmp->start_freq_khz > freq_range->end_freq_khz)
633 break;
634
Janusz Dziedzic97524822014-01-30 09:52:20 +0100635 freq_range = freq_range_tmp;
636 }
637
638 end_freq = freq_range->end_freq_khz;
639
640 return end_freq - start_freq;
641}
642
Arik Nemtsova6d4a532014-10-23 09:37:33 +0300643unsigned int reg_get_max_bandwidth(const struct ieee80211_regdomain *rd,
644 const struct ieee80211_reg_rule *rule)
645{
646 unsigned int bw = reg_get_max_bandwidth_from_range(rd, rule);
647
648 if (rule->flags & NL80211_RRF_NO_160MHZ)
649 bw = min_t(unsigned int, bw, MHZ_TO_KHZ(80));
650 if (rule->flags & NL80211_RRF_NO_80MHZ)
651 bw = min_t(unsigned int, bw, MHZ_TO_KHZ(40));
652
653 /*
654 * HT40+/HT40- limits are handled per-channel. Only limit BW if both
655 * are not allowed.
656 */
657 if (rule->flags & NL80211_RRF_NO_HT40MINUS &&
658 rule->flags & NL80211_RRF_NO_HT40PLUS)
659 bw = min_t(unsigned int, bw, MHZ_TO_KHZ(20));
660
661 return bw;
662}
663
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700664/* Sanity check on a regulatory rule */
Johannes Berga3d2eaf2008-09-15 11:10:52 +0200665static bool is_valid_reg_rule(const struct ieee80211_reg_rule *rule)
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700666{
Johannes Berga3d2eaf2008-09-15 11:10:52 +0200667 const struct ieee80211_freq_range *freq_range = &rule->freq_range;
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700668 u32 freq_diff;
669
Luis R. Rodriguez91e99002008-11-12 14:21:55 -0800670 if (freq_range->start_freq_khz <= 0 || freq_range->end_freq_khz <= 0)
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700671 return false;
672
673 if (freq_range->start_freq_khz > freq_range->end_freq_khz)
674 return false;
675
676 freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz;
677
Roel Kluinbd05f282009-03-03 22:55:21 +0100678 if (freq_range->end_freq_khz <= freq_range->start_freq_khz ||
Johannes Berg1a919312012-12-03 17:21:11 +0100679 freq_range->max_bandwidth_khz > freq_diff)
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700680 return false;
681
682 return true;
683}
684
Johannes Berga3d2eaf2008-09-15 11:10:52 +0200685static bool is_valid_rd(const struct ieee80211_regdomain *rd)
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700686{
Johannes Berga3d2eaf2008-09-15 11:10:52 +0200687 const struct ieee80211_reg_rule *reg_rule = NULL;
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700688 unsigned int i;
689
690 if (!rd->n_reg_rules)
691 return false;
692
Luis R. Rodriguez88dc1c32008-11-12 14:22:01 -0800693 if (WARN_ON(rd->n_reg_rules > NL80211_MAX_SUPP_REG_RULES))
694 return false;
695
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700696 for (i = 0; i < rd->n_reg_rules; i++) {
697 reg_rule = &rd->reg_rules[i];
698 if (!is_valid_reg_rule(reg_rule))
699 return false;
700 }
701
702 return true;
703}
704
Luis R. Rodriguez038659e2009-05-02 00:37:17 -0400705static bool reg_does_bw_fit(const struct ieee80211_freq_range *freq_range,
Johannes Bergfe7ef5e2012-12-04 15:07:34 +0100706 u32 center_freq_khz, u32 bw_khz)
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700707{
Luis R. Rodriguez038659e2009-05-02 00:37:17 -0400708 u32 start_freq_khz, end_freq_khz;
709
710 start_freq_khz = center_freq_khz - (bw_khz/2);
711 end_freq_khz = center_freq_khz + (bw_khz/2);
712
713 if (start_freq_khz >= freq_range->start_freq_khz &&
714 end_freq_khz <= freq_range->end_freq_khz)
715 return true;
716
717 return false;
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700718}
719
Luis R. Rodriguez0c7dc452009-01-07 17:43:36 -0800720/**
721 * freq_in_rule_band - tells us if a frequency is in a frequency band
722 * @freq_range: frequency rule we want to query
723 * @freq_khz: frequency we are inquiring about
724 *
725 * This lets us know if a specific frequency rule is or is not relevant to
726 * a specific frequency's band. Bands are device specific and artificial
Vladimir Kondratiev64629b92012-09-23 09:49:54 +0200727 * definitions (the "2.4 GHz band", the "5 GHz band" and the "60GHz band"),
728 * however it is safe for now to assume that a frequency rule should not be
729 * part of a frequency's band if the start freq or end freq are off by more
730 * than 2 GHz for the 2.4 and 5 GHz bands, and by more than 10 GHz for the
731 * 60 GHz band.
Luis R. Rodriguez0c7dc452009-01-07 17:43:36 -0800732 * This resolution can be lowered and should be considered as we add
733 * regulatory rule support for other "bands".
734 **/
735static bool freq_in_rule_band(const struct ieee80211_freq_range *freq_range,
Johannes Berg1a919312012-12-03 17:21:11 +0100736 u32 freq_khz)
Luis R. Rodriguez0c7dc452009-01-07 17:43:36 -0800737{
738#define ONE_GHZ_IN_KHZ 1000000
Vladimir Kondratiev64629b92012-09-23 09:49:54 +0200739 /*
740 * From 802.11ad: directional multi-gigabit (DMG):
741 * Pertaining to operation in a frequency band containing a channel
742 * with the Channel starting frequency above 45 GHz.
743 */
744 u32 limit = freq_khz > 45 * ONE_GHZ_IN_KHZ ?
745 10 * ONE_GHZ_IN_KHZ : 2 * ONE_GHZ_IN_KHZ;
746 if (abs(freq_khz - freq_range->start_freq_khz) <= limit)
Luis R. Rodriguez0c7dc452009-01-07 17:43:36 -0800747 return true;
Vladimir Kondratiev64629b92012-09-23 09:49:54 +0200748 if (abs(freq_khz - freq_range->end_freq_khz) <= limit)
Luis R. Rodriguez0c7dc452009-01-07 17:43:36 -0800749 return true;
750 return false;
751#undef ONE_GHZ_IN_KHZ
752}
753
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -0500754/*
Luis R. Rodriguezadbfb052013-11-13 18:54:03 +0100755 * Later on we can perhaps use the more restrictive DFS
756 * region but we don't have information for that yet so
757 * for now simply disallow conflicts.
758 */
759static enum nl80211_dfs_regions
760reg_intersect_dfs_region(const enum nl80211_dfs_regions dfs_region1,
761 const enum nl80211_dfs_regions dfs_region2)
762{
763 if (dfs_region1 != dfs_region2)
764 return NL80211_DFS_UNSET;
765 return dfs_region1;
766}
767
768/*
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -0500769 * Helper for regdom_intersect(), this does the real
770 * mathematical intersection fun
771 */
Janusz Dziedzic97524822014-01-30 09:52:20 +0100772static int reg_rules_intersect(const struct ieee80211_regdomain *rd1,
773 const struct ieee80211_regdomain *rd2,
774 const struct ieee80211_reg_rule *rule1,
Johannes Berg1a919312012-12-03 17:21:11 +0100775 const struct ieee80211_reg_rule *rule2,
776 struct ieee80211_reg_rule *intersected_rule)
Luis R. Rodriguez9c964772008-10-30 13:33:53 -0700777{
778 const struct ieee80211_freq_range *freq_range1, *freq_range2;
779 struct ieee80211_freq_range *freq_range;
780 const struct ieee80211_power_rule *power_rule1, *power_rule2;
781 struct ieee80211_power_rule *power_rule;
Janusz Dziedzic97524822014-01-30 09:52:20 +0100782 u32 freq_diff, max_bandwidth1, max_bandwidth2;
Luis R. Rodriguez9c964772008-10-30 13:33:53 -0700783
784 freq_range1 = &rule1->freq_range;
785 freq_range2 = &rule2->freq_range;
786 freq_range = &intersected_rule->freq_range;
787
788 power_rule1 = &rule1->power_rule;
789 power_rule2 = &rule2->power_rule;
790 power_rule = &intersected_rule->power_rule;
791
792 freq_range->start_freq_khz = max(freq_range1->start_freq_khz,
Johannes Berg1a919312012-12-03 17:21:11 +0100793 freq_range2->start_freq_khz);
Luis R. Rodriguez9c964772008-10-30 13:33:53 -0700794 freq_range->end_freq_khz = min(freq_range1->end_freq_khz,
Johannes Berg1a919312012-12-03 17:21:11 +0100795 freq_range2->end_freq_khz);
Janusz Dziedzic97524822014-01-30 09:52:20 +0100796
797 max_bandwidth1 = freq_range1->max_bandwidth_khz;
798 max_bandwidth2 = freq_range2->max_bandwidth_khz;
799
Janusz Dziedzicb0dfd2e2014-02-20 13:52:16 +0100800 if (rule1->flags & NL80211_RRF_AUTO_BW)
801 max_bandwidth1 = reg_get_max_bandwidth(rd1, rule1);
802 if (rule2->flags & NL80211_RRF_AUTO_BW)
803 max_bandwidth2 = reg_get_max_bandwidth(rd2, rule2);
Janusz Dziedzic97524822014-01-30 09:52:20 +0100804
805 freq_range->max_bandwidth_khz = min(max_bandwidth1, max_bandwidth2);
Luis R. Rodriguez9c964772008-10-30 13:33:53 -0700806
Janusz Dziedzicb0dfd2e2014-02-20 13:52:16 +0100807 intersected_rule->flags = rule1->flags | rule2->flags;
808
809 /*
810 * In case NL80211_RRF_AUTO_BW requested for both rules
811 * set AUTO_BW in intersected rule also. Next we will
812 * calculate BW correctly in handle_channel function.
813 * In other case remove AUTO_BW flag while we calculate
814 * maximum bandwidth correctly and auto calculation is
815 * not required.
816 */
817 if ((rule1->flags & NL80211_RRF_AUTO_BW) &&
818 (rule2->flags & NL80211_RRF_AUTO_BW))
819 intersected_rule->flags |= NL80211_RRF_AUTO_BW;
820 else
821 intersected_rule->flags &= ~NL80211_RRF_AUTO_BW;
822
Luis R. Rodriguez9c964772008-10-30 13:33:53 -0700823 freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz;
824 if (freq_range->max_bandwidth_khz > freq_diff)
825 freq_range->max_bandwidth_khz = freq_diff;
826
827 power_rule->max_eirp = min(power_rule1->max_eirp,
828 power_rule2->max_eirp);
829 power_rule->max_antenna_gain = min(power_rule1->max_antenna_gain,
830 power_rule2->max_antenna_gain);
831
Janusz Dziedzic089027e2014-02-21 19:46:12 +0100832 intersected_rule->dfs_cac_ms = max(rule1->dfs_cac_ms,
833 rule2->dfs_cac_ms);
834
Luis R. Rodriguez9c964772008-10-30 13:33:53 -0700835 if (!is_valid_reg_rule(intersected_rule))
836 return -EINVAL;
837
838 return 0;
839}
840
Eliad Pellera62a1ae2014-09-03 15:25:03 +0300841/* check whether old rule contains new rule */
842static bool rule_contains(struct ieee80211_reg_rule *r1,
843 struct ieee80211_reg_rule *r2)
844{
845 /* for simplicity, currently consider only same flags */
846 if (r1->flags != r2->flags)
847 return false;
848
849 /* verify r1 is more restrictive */
850 if ((r1->power_rule.max_antenna_gain >
851 r2->power_rule.max_antenna_gain) ||
852 r1->power_rule.max_eirp > r2->power_rule.max_eirp)
853 return false;
854
855 /* make sure r2's range is contained within r1 */
856 if (r1->freq_range.start_freq_khz > r2->freq_range.start_freq_khz ||
857 r1->freq_range.end_freq_khz < r2->freq_range.end_freq_khz)
858 return false;
859
860 /* and finally verify that r1.max_bw >= r2.max_bw */
861 if (r1->freq_range.max_bandwidth_khz <
862 r2->freq_range.max_bandwidth_khz)
863 return false;
864
865 return true;
866}
867
868/* add or extend current rules. do nothing if rule is already contained */
869static void add_rule(struct ieee80211_reg_rule *rule,
870 struct ieee80211_reg_rule *reg_rules, u32 *n_rules)
871{
872 struct ieee80211_reg_rule *tmp_rule;
873 int i;
874
875 for (i = 0; i < *n_rules; i++) {
876 tmp_rule = &reg_rules[i];
877 /* rule is already contained - do nothing */
878 if (rule_contains(tmp_rule, rule))
879 return;
880
881 /* extend rule if possible */
882 if (rule_contains(rule, tmp_rule)) {
883 memcpy(tmp_rule, rule, sizeof(*rule));
884 return;
885 }
886 }
887
888 memcpy(&reg_rules[*n_rules], rule, sizeof(*rule));
889 (*n_rules)++;
890}
891
Luis R. Rodriguez9c964772008-10-30 13:33:53 -0700892/**
893 * regdom_intersect - do the intersection between two regulatory domains
894 * @rd1: first regulatory domain
895 * @rd2: second regulatory domain
896 *
897 * Use this function to get the intersection between two regulatory domains.
898 * Once completed we will mark the alpha2 for the rd as intersected, "98",
899 * as no one single alpha2 can represent this regulatory domain.
900 *
901 * Returns a pointer to the regulatory domain structure which will hold the
902 * resulting intersection of rules between rd1 and rd2. We will
903 * kzalloc() this structure for you.
904 */
Johannes Berg1a919312012-12-03 17:21:11 +0100905static struct ieee80211_regdomain *
906regdom_intersect(const struct ieee80211_regdomain *rd1,
907 const struct ieee80211_regdomain *rd2)
Luis R. Rodriguez9c964772008-10-30 13:33:53 -0700908{
909 int r, size_of_regd;
910 unsigned int x, y;
Eliad Pellera62a1ae2014-09-03 15:25:03 +0300911 unsigned int num_rules = 0;
Luis R. Rodriguez9c964772008-10-30 13:33:53 -0700912 const struct ieee80211_reg_rule *rule1, *rule2;
Eliad Pellera62a1ae2014-09-03 15:25:03 +0300913 struct ieee80211_reg_rule intersected_rule;
Luis R. Rodriguez9c964772008-10-30 13:33:53 -0700914 struct ieee80211_regdomain *rd;
Luis R. Rodriguez9c964772008-10-30 13:33:53 -0700915
916 if (!rd1 || !rd2)
917 return NULL;
918
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -0500919 /*
920 * First we get a count of the rules we'll need, then we actually
Luis R. Rodriguez9c964772008-10-30 13:33:53 -0700921 * build them. This is to so we can malloc() and free() a
922 * regdomain once. The reason we use reg_rules_intersect() here
923 * is it will return -EINVAL if the rule computed makes no sense.
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -0500924 * All rules that do check out OK are valid.
925 */
Luis R. Rodriguez9c964772008-10-30 13:33:53 -0700926
927 for (x = 0; x < rd1->n_reg_rules; x++) {
928 rule1 = &rd1->reg_rules[x];
929 for (y = 0; y < rd2->n_reg_rules; y++) {
930 rule2 = &rd2->reg_rules[y];
Janusz Dziedzic97524822014-01-30 09:52:20 +0100931 if (!reg_rules_intersect(rd1, rd2, rule1, rule2,
Eliad Pellera62a1ae2014-09-03 15:25:03 +0300932 &intersected_rule))
Luis R. Rodriguez9c964772008-10-30 13:33:53 -0700933 num_rules++;
Luis R. Rodriguez9c964772008-10-30 13:33:53 -0700934 }
935 }
936
937 if (!num_rules)
938 return NULL;
939
940 size_of_regd = sizeof(struct ieee80211_regdomain) +
Johannes Berg82f20852012-12-04 12:49:16 +0100941 num_rules * sizeof(struct ieee80211_reg_rule);
Luis R. Rodriguez9c964772008-10-30 13:33:53 -0700942
943 rd = kzalloc(size_of_regd, GFP_KERNEL);
944 if (!rd)
945 return NULL;
946
Eliad Pellera62a1ae2014-09-03 15:25:03 +0300947 for (x = 0; x < rd1->n_reg_rules; x++) {
Luis R. Rodriguez9c964772008-10-30 13:33:53 -0700948 rule1 = &rd1->reg_rules[x];
Eliad Pellera62a1ae2014-09-03 15:25:03 +0300949 for (y = 0; y < rd2->n_reg_rules; y++) {
Luis R. Rodriguez9c964772008-10-30 13:33:53 -0700950 rule2 = &rd2->reg_rules[y];
Janusz Dziedzic97524822014-01-30 09:52:20 +0100951 r = reg_rules_intersect(rd1, rd2, rule1, rule2,
Eliad Pellera62a1ae2014-09-03 15:25:03 +0300952 &intersected_rule);
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -0500953 /*
954 * No need to memset here the intersected rule here as
955 * we're not using the stack anymore
956 */
Luis R. Rodriguez9c964772008-10-30 13:33:53 -0700957 if (r)
958 continue;
Eliad Pellera62a1ae2014-09-03 15:25:03 +0300959
960 add_rule(&intersected_rule, rd->reg_rules,
961 &rd->n_reg_rules);
Luis R. Rodriguez9c964772008-10-30 13:33:53 -0700962 }
963 }
964
Luis R. Rodriguez9c964772008-10-30 13:33:53 -0700965 rd->alpha2[0] = '9';
966 rd->alpha2[1] = '8';
Luis R. Rodriguezadbfb052013-11-13 18:54:03 +0100967 rd->dfs_region = reg_intersect_dfs_region(rd1->dfs_region,
968 rd2->dfs_region);
Luis R. Rodriguez9c964772008-10-30 13:33:53 -0700969
970 return rd;
971}
972
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -0500973/*
974 * XXX: add support for the rest of enum nl80211_reg_rule_flags, we may
975 * want to just have the channel structure use these
976 */
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700977static u32 map_regdom_flags(u32 rd_flags)
978{
979 u32 channel_flags = 0;
Luis R. Rodriguez8fe02e12013-10-21 19:22:25 +0200980 if (rd_flags & NL80211_RRF_NO_IR_ALL)
981 channel_flags |= IEEE80211_CHAN_NO_IR;
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700982 if (rd_flags & NL80211_RRF_DFS)
983 channel_flags |= IEEE80211_CHAN_RADAR;
Seth Forshee03f6b082012-08-01 15:58:42 -0500984 if (rd_flags & NL80211_RRF_NO_OFDM)
985 channel_flags |= IEEE80211_CHAN_NO_OFDM;
David Spinadel570dbde2014-02-23 09:12:59 +0200986 if (rd_flags & NL80211_RRF_NO_OUTDOOR)
987 channel_flags |= IEEE80211_CHAN_INDOOR_ONLY;
Arik Nemtsov06f207f2015-05-06 16:28:31 +0300988 if (rd_flags & NL80211_RRF_IR_CONCURRENT)
989 channel_flags |= IEEE80211_CHAN_IR_CONCURRENT;
Arik Nemtsova6d4a532014-10-23 09:37:33 +0300990 if (rd_flags & NL80211_RRF_NO_HT40MINUS)
991 channel_flags |= IEEE80211_CHAN_NO_HT40MINUS;
992 if (rd_flags & NL80211_RRF_NO_HT40PLUS)
993 channel_flags |= IEEE80211_CHAN_NO_HT40PLUS;
994 if (rd_flags & NL80211_RRF_NO_80MHZ)
995 channel_flags |= IEEE80211_CHAN_NO_80MHZ;
996 if (rd_flags & NL80211_RRF_NO_160MHZ)
997 channel_flags |= IEEE80211_CHAN_NO_160MHZ;
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -0700998 return channel_flags;
999}
1000
Johannes Berg361c9c82012-12-06 15:57:14 +01001001static const struct ieee80211_reg_rule *
1002freq_reg_info_regd(struct wiphy *wiphy, u32 center_freq,
Matthias May4edd5692015-07-17 15:28:39 +02001003 const struct ieee80211_regdomain *regd, u32 bw)
Johannes Berg8318d782008-01-24 19:38:38 +01001004{
1005 int i;
Luis R. Rodriguez0c7dc452009-01-07 17:43:36 -08001006 bool band_rule_found = false;
Luis R. Rodriguez038659e2009-05-02 00:37:17 -04001007 bool bw_fits = false;
1008
Luis R. Rodriguez3e0c3ff2009-01-07 17:43:34 -08001009 if (!regd)
Johannes Berg361c9c82012-12-06 15:57:14 +01001010 return ERR_PTR(-EINVAL);
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07001011
Luis R. Rodriguez3e0c3ff2009-01-07 17:43:34 -08001012 for (i = 0; i < regd->n_reg_rules; i++) {
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07001013 const struct ieee80211_reg_rule *rr;
1014 const struct ieee80211_freq_range *fr = NULL;
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07001015
Luis R. Rodriguez3e0c3ff2009-01-07 17:43:34 -08001016 rr = &regd->reg_rules[i];
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07001017 fr = &rr->freq_range;
Luis R. Rodriguez0c7dc452009-01-07 17:43:36 -08001018
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -05001019 /*
1020 * We only need to know if one frequency rule was
Luis R. Rodriguez0c7dc452009-01-07 17:43:36 -08001021 * was in center_freq's band, that's enough, so lets
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -05001022 * not overwrite it once found
1023 */
Luis R. Rodriguez0c7dc452009-01-07 17:43:36 -08001024 if (!band_rule_found)
1025 band_rule_found = freq_in_rule_band(fr, center_freq);
1026
Matthias May4edd5692015-07-17 15:28:39 +02001027 bw_fits = reg_does_bw_fit(fr, center_freq, bw);
Luis R. Rodriguez0c7dc452009-01-07 17:43:36 -08001028
Johannes Berg361c9c82012-12-06 15:57:14 +01001029 if (band_rule_found && bw_fits)
1030 return rr;
Johannes Berg8318d782008-01-24 19:38:38 +01001031 }
1032
Luis R. Rodriguez0c7dc452009-01-07 17:43:36 -08001033 if (!band_rule_found)
Johannes Berg361c9c82012-12-06 15:57:14 +01001034 return ERR_PTR(-ERANGE);
Luis R. Rodriguez0c7dc452009-01-07 17:43:36 -08001035
Johannes Berg361c9c82012-12-06 15:57:14 +01001036 return ERR_PTR(-EINVAL);
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07001037}
1038
Johannes Berg8de1c632015-08-21 14:13:06 +02001039static const struct ieee80211_reg_rule *
1040__freq_reg_info(struct wiphy *wiphy, u32 center_freq, u32 min_bw)
Matthias May4edd5692015-07-17 15:28:39 +02001041{
1042 const struct ieee80211_regdomain *regd = reg_get_regdomain(wiphy);
1043 const struct ieee80211_reg_rule *reg_rule = NULL;
1044 u32 bw;
1045
1046 for (bw = MHZ_TO_KHZ(20); bw >= min_bw; bw = bw / 2) {
1047 reg_rule = freq_reg_info_regd(wiphy, center_freq, regd, bw);
1048 if (!IS_ERR(reg_rule))
1049 return reg_rule;
1050 }
1051
1052 return reg_rule;
1053}
1054
Johannes Berg361c9c82012-12-06 15:57:14 +01001055const struct ieee80211_reg_rule *freq_reg_info(struct wiphy *wiphy,
1056 u32 center_freq)
Luis R. Rodriguez1fa25e42009-01-22 15:05:44 -08001057{
Matthias May4edd5692015-07-17 15:28:39 +02001058 return __freq_reg_info(wiphy, center_freq, MHZ_TO_KHZ(20));
Luis R. Rodriguez1fa25e42009-01-22 15:05:44 -08001059}
John W. Linville4f366c52010-07-15 14:57:33 -04001060EXPORT_SYMBOL(freq_reg_info);
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07001061
Luis R. Rodriguez034c6d62013-10-14 17:42:06 -07001062const char *reg_initiator_name(enum nl80211_reg_initiator initiator)
Luis R. Rodriguez926a0a02010-10-21 19:17:03 +05301063{
1064 switch (initiator) {
1065 case NL80211_REGDOM_SET_BY_CORE:
Luis R. Rodriguez034c6d62013-10-14 17:42:06 -07001066 return "core";
Luis R. Rodriguez926a0a02010-10-21 19:17:03 +05301067 case NL80211_REGDOM_SET_BY_USER:
Luis R. Rodriguez034c6d62013-10-14 17:42:06 -07001068 return "user";
Luis R. Rodriguez926a0a02010-10-21 19:17:03 +05301069 case NL80211_REGDOM_SET_BY_DRIVER:
Luis R. Rodriguez034c6d62013-10-14 17:42:06 -07001070 return "driver";
Luis R. Rodriguez926a0a02010-10-21 19:17:03 +05301071 case NL80211_REGDOM_SET_BY_COUNTRY_IE:
Luis R. Rodriguez034c6d62013-10-14 17:42:06 -07001072 return "country IE";
Luis R. Rodriguez926a0a02010-10-21 19:17:03 +05301073 default:
1074 WARN_ON(1);
Luis R. Rodriguez034c6d62013-10-14 17:42:06 -07001075 return "bug";
Luis R. Rodriguez926a0a02010-10-21 19:17:03 +05301076 }
1077}
Luis R. Rodriguez034c6d62013-10-14 17:42:06 -07001078EXPORT_SYMBOL(reg_initiator_name);
Luis R. Rodrigueze702d3c2010-10-21 19:17:04 +05301079
Luis R. Rodriguez034c6d62013-10-14 17:42:06 -07001080#ifdef CONFIG_CFG80211_REG_DEBUG
Janusz Dziedzicb0dfd2e2014-02-20 13:52:16 +01001081static void chan_reg_rule_print_dbg(const struct ieee80211_regdomain *regd,
1082 struct ieee80211_channel *chan,
Luis R. Rodrigueze702d3c2010-10-21 19:17:04 +05301083 const struct ieee80211_reg_rule *reg_rule)
1084{
1085 const struct ieee80211_power_rule *power_rule;
1086 const struct ieee80211_freq_range *freq_range;
Janusz Dziedzicb0dfd2e2014-02-20 13:52:16 +01001087 char max_antenna_gain[32], bw[32];
Luis R. Rodrigueze702d3c2010-10-21 19:17:04 +05301088
1089 power_rule = &reg_rule->power_rule;
1090 freq_range = &reg_rule->freq_range;
1091
1092 if (!power_rule->max_antenna_gain)
Janusz Dziedzicb0dfd2e2014-02-20 13:52:16 +01001093 snprintf(max_antenna_gain, sizeof(max_antenna_gain), "N/A");
Luis R. Rodrigueze702d3c2010-10-21 19:17:04 +05301094 else
Janusz Dziedzicb0dfd2e2014-02-20 13:52:16 +01001095 snprintf(max_antenna_gain, sizeof(max_antenna_gain), "%d",
1096 power_rule->max_antenna_gain);
1097
1098 if (reg_rule->flags & NL80211_RRF_AUTO_BW)
1099 snprintf(bw, sizeof(bw), "%d KHz, %d KHz AUTO",
1100 freq_range->max_bandwidth_khz,
1101 reg_get_max_bandwidth(regd, reg_rule));
1102 else
1103 snprintf(bw, sizeof(bw), "%d KHz",
1104 freq_range->max_bandwidth_khz);
Luis R. Rodrigueze702d3c2010-10-21 19:17:04 +05301105
Johannes Bergfe7ef5e2012-12-04 15:07:34 +01001106 REG_DBG_PRINT("Updating information on frequency %d MHz with regulatory rule:\n",
1107 chan->center_freq);
Luis R. Rodrigueze702d3c2010-10-21 19:17:04 +05301108
Janusz Dziedzicb0dfd2e2014-02-20 13:52:16 +01001109 REG_DBG_PRINT("%d KHz - %d KHz @ %s), (%s mBi, %d mBm)\n",
Johannes Berg1a919312012-12-03 17:21:11 +01001110 freq_range->start_freq_khz, freq_range->end_freq_khz,
Janusz Dziedzicb0dfd2e2014-02-20 13:52:16 +01001111 bw, max_antenna_gain,
Luis R. Rodrigueze702d3c2010-10-21 19:17:04 +05301112 power_rule->max_eirp);
1113}
1114#else
Janusz Dziedzicb0dfd2e2014-02-20 13:52:16 +01001115static void chan_reg_rule_print_dbg(const struct ieee80211_regdomain *regd,
1116 struct ieee80211_channel *chan,
Luis R. Rodrigueze702d3c2010-10-21 19:17:04 +05301117 const struct ieee80211_reg_rule *reg_rule)
1118{
1119 return;
1120}
Luis R. Rodriguez926a0a02010-10-21 19:17:03 +05301121#endif
1122
Johannes Berge33e2242014-06-23 11:06:16 +02001123/*
1124 * Note that right now we assume the desired channel bandwidth
1125 * is always 20 MHz for each individual channel (HT40 uses 20 MHz
1126 * per channel, the primary and the extension channel).
Luis R. Rodriguez038659e2009-05-02 00:37:17 -04001127 */
Luis R. Rodriguez7ca43d02010-10-20 10:18:53 -07001128static void handle_channel(struct wiphy *wiphy,
1129 enum nl80211_reg_initiator initiator,
Johannes Bergfdc9d7b2012-12-03 18:36:09 +01001130 struct ieee80211_channel *chan)
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07001131{
Luis R. Rodriguez038659e2009-05-02 00:37:17 -04001132 u32 flags, bw_flags = 0;
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07001133 const struct ieee80211_reg_rule *reg_rule = NULL;
1134 const struct ieee80211_power_rule *power_rule = NULL;
Luis R. Rodriguez038659e2009-05-02 00:37:17 -04001135 const struct ieee80211_freq_range *freq_range = NULL;
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05001136 struct wiphy *request_wiphy = NULL;
Johannes Bergc492db32012-12-06 16:29:25 +01001137 struct regulatory_request *lr = get_last_request();
Janusz Dziedzic97524822014-01-30 09:52:20 +01001138 const struct ieee80211_regdomain *regd;
1139 u32 max_bandwidth_khz;
Luis R. Rodrigueza92a3ce2009-01-07 17:43:33 -08001140
Johannes Bergc492db32012-12-06 16:29:25 +01001141 request_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx);
Luis R. Rodrigueza92a3ce2009-01-07 17:43:33 -08001142
1143 flags = chan->orig_flags;
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07001144
Johannes Berg361c9c82012-12-06 15:57:14 +01001145 reg_rule = freq_reg_info(wiphy, MHZ_TO_KHZ(chan->center_freq));
1146 if (IS_ERR(reg_rule)) {
Luis R. Rodriguezca4ffe82010-10-20 10:18:55 -07001147 /*
1148 * We will disable all channels that do not match our
Lucas De Marchi25985ed2011-03-30 22:57:33 -03001149 * received regulatory rule unless the hint is coming
Luis R. Rodriguezca4ffe82010-10-20 10:18:55 -07001150 * from a Country IE and the Country IE had no information
1151 * about a band. The IEEE 802.11 spec allows for an AP
1152 * to send only a subset of the regulatory rules allowed,
1153 * so an AP in the US that only supports 2.4 GHz may only send
1154 * a country IE with information for the 2.4 GHz band
1155 * while 5 GHz is still supported.
1156 */
1157 if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE &&
Johannes Berg361c9c82012-12-06 15:57:14 +01001158 PTR_ERR(reg_rule) == -ERANGE)
Luis R. Rodriguezca4ffe82010-10-20 10:18:55 -07001159 return;
1160
Luis R. Rodriguezcc493e4f2013-11-06 17:54:44 +01001161 if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER &&
1162 request_wiphy && request_wiphy == wiphy &&
Luis R. Rodrigueza2f73b62013-11-11 22:15:29 +01001163 request_wiphy->regulatory_flags & REGULATORY_STRICT_REG) {
Luis R. Rodriguezcc493e4f2013-11-06 17:54:44 +01001164 REG_DBG_PRINT("Disabling freq %d MHz for good\n",
1165 chan->center_freq);
1166 chan->orig_flags |= IEEE80211_CHAN_DISABLED;
1167 chan->flags = chan->orig_flags;
1168 } else {
1169 REG_DBG_PRINT("Disabling freq %d MHz\n",
1170 chan->center_freq);
1171 chan->flags |= IEEE80211_CHAN_DISABLED;
1172 }
Johannes Berg8318d782008-01-24 19:38:38 +01001173 return;
Luis R. Rodriguezca4ffe82010-10-20 10:18:55 -07001174 }
Johannes Berg8318d782008-01-24 19:38:38 +01001175
Janusz Dziedzicb0dfd2e2014-02-20 13:52:16 +01001176 regd = reg_get_regdomain(wiphy);
1177 chan_reg_rule_print_dbg(regd, chan, reg_rule);
Luis R. Rodrigueze702d3c2010-10-21 19:17:04 +05301178
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07001179 power_rule = &reg_rule->power_rule;
Luis R. Rodriguez038659e2009-05-02 00:37:17 -04001180 freq_range = &reg_rule->freq_range;
1181
Janusz Dziedzic97524822014-01-30 09:52:20 +01001182 max_bandwidth_khz = freq_range->max_bandwidth_khz;
1183 /* Check if auto calculation requested */
Janusz Dziedzicb0dfd2e2014-02-20 13:52:16 +01001184 if (reg_rule->flags & NL80211_RRF_AUTO_BW)
Janusz Dziedzic97524822014-01-30 09:52:20 +01001185 max_bandwidth_khz = reg_get_max_bandwidth(regd, reg_rule);
Janusz Dziedzic97524822014-01-30 09:52:20 +01001186
Matthias May4edd5692015-07-17 15:28:39 +02001187 /* If we get a reg_rule we can assume that at least 5Mhz fit */
1188 if (!reg_does_bw_fit(freq_range, MHZ_TO_KHZ(chan->center_freq),
1189 MHZ_TO_KHZ(10)))
1190 bw_flags |= IEEE80211_CHAN_NO_10MHZ;
1191 if (!reg_does_bw_fit(freq_range, MHZ_TO_KHZ(chan->center_freq),
1192 MHZ_TO_KHZ(20)))
1193 bw_flags |= IEEE80211_CHAN_NO_20MHZ;
1194
1195 if (max_bandwidth_khz < MHZ_TO_KHZ(10))
1196 bw_flags |= IEEE80211_CHAN_NO_10MHZ;
1197 if (max_bandwidth_khz < MHZ_TO_KHZ(20))
1198 bw_flags |= IEEE80211_CHAN_NO_20MHZ;
Janusz Dziedzic97524822014-01-30 09:52:20 +01001199 if (max_bandwidth_khz < MHZ_TO_KHZ(40))
Matthias May4edd5692015-07-17 15:28:39 +02001200 bw_flags |= IEEE80211_CHAN_NO_HT40;
Janusz Dziedzic97524822014-01-30 09:52:20 +01001201 if (max_bandwidth_khz < MHZ_TO_KHZ(80))
Johannes Bergc7a6ee22012-12-12 17:50:39 +01001202 bw_flags |= IEEE80211_CHAN_NO_80MHZ;
Janusz Dziedzic97524822014-01-30 09:52:20 +01001203 if (max_bandwidth_khz < MHZ_TO_KHZ(160))
Johannes Bergc7a6ee22012-12-12 17:50:39 +01001204 bw_flags |= IEEE80211_CHAN_NO_160MHZ;
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07001205
Johannes Bergc492db32012-12-06 16:29:25 +01001206 if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER &&
Luis R. Rodriguez806a9e32009-02-21 00:04:26 -05001207 request_wiphy && request_wiphy == wiphy &&
Luis R. Rodrigueza2f73b62013-11-11 22:15:29 +01001208 request_wiphy->regulatory_flags & REGULATORY_STRICT_REG) {
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -05001209 /*
Lucas De Marchi25985ed2011-03-30 22:57:33 -03001210 * This guarantees the driver's requested regulatory domain
Luis R. Rodriguezf9763762009-01-22 15:05:52 -08001211 * will always be used as a base for further regulatory
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -05001212 * settings
1213 */
Luis R. Rodriguezf9763762009-01-22 15:05:52 -08001214 chan->flags = chan->orig_flags =
Luis R. Rodriguez038659e2009-05-02 00:37:17 -04001215 map_regdom_flags(reg_rule->flags) | bw_flags;
Luis R. Rodriguezf9763762009-01-22 15:05:52 -08001216 chan->max_antenna_gain = chan->orig_mag =
1217 (int) MBI_TO_DBI(power_rule->max_antenna_gain);
Felix Fietkau279f0f52012-10-17 13:56:20 +02001218 chan->max_reg_power = chan->max_power = chan->orig_mpwr =
Luis R. Rodriguezf9763762009-01-22 15:05:52 -08001219 (int) MBM_TO_DBM(power_rule->max_eirp);
Janusz Dziedzic4f267c12014-04-09 13:47:12 +02001220
1221 if (chan->flags & IEEE80211_CHAN_RADAR) {
1222 chan->dfs_cac_ms = IEEE80211_DFS_MIN_CAC_TIME_MS;
1223 if (reg_rule->dfs_cac_ms)
1224 chan->dfs_cac_ms = reg_rule->dfs_cac_ms;
1225 }
1226
Luis R. Rodriguezf9763762009-01-22 15:05:52 -08001227 return;
1228 }
1229
Simon Wunderlich04f39042013-02-08 18:16:19 +01001230 chan->dfs_state = NL80211_DFS_USABLE;
1231 chan->dfs_state_entered = jiffies;
1232
Rajkumar Manoharanaa3d7ee2011-09-14 14:28:17 +05301233 chan->beacon_found = false;
Luis R. Rodriguez038659e2009-05-02 00:37:17 -04001234 chan->flags = flags | bw_flags | map_regdom_flags(reg_rule->flags);
Johannes Berg1a919312012-12-03 17:21:11 +01001235 chan->max_antenna_gain =
1236 min_t(int, chan->orig_mag,
1237 MBI_TO_DBI(power_rule->max_antenna_gain));
Hong Wueccc0682012-01-11 20:33:39 +02001238 chan->max_reg_power = (int) MBM_TO_DBM(power_rule->max_eirp);
Janusz Dziedzic089027e2014-02-21 19:46:12 +01001239
1240 if (chan->flags & IEEE80211_CHAN_RADAR) {
1241 if (reg_rule->dfs_cac_ms)
1242 chan->dfs_cac_ms = reg_rule->dfs_cac_ms;
1243 else
1244 chan->dfs_cac_ms = IEEE80211_DFS_MIN_CAC_TIME_MS;
1245 }
1246
Stanislaw Gruszka5e31fc02012-07-24 08:35:39 +02001247 if (chan->orig_mpwr) {
1248 /*
Luis R. Rodrigueza09a85a2013-11-11 22:15:30 +01001249 * Devices that use REGULATORY_COUNTRY_IE_FOLLOW_POWER
1250 * will always follow the passed country IE power settings.
Stanislaw Gruszka5e31fc02012-07-24 08:35:39 +02001251 */
1252 if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE &&
Luis R. Rodrigueza09a85a2013-11-11 22:15:30 +01001253 wiphy->regulatory_flags & REGULATORY_COUNTRY_IE_FOLLOW_POWER)
Stanislaw Gruszka5e31fc02012-07-24 08:35:39 +02001254 chan->max_power = chan->max_reg_power;
1255 else
1256 chan->max_power = min(chan->orig_mpwr,
1257 chan->max_reg_power);
1258 } else
1259 chan->max_power = chan->max_reg_power;
Johannes Berg8318d782008-01-24 19:38:38 +01001260}
1261
Luis R. Rodriguez7ca43d02010-10-20 10:18:53 -07001262static void handle_band(struct wiphy *wiphy,
Johannes Bergfdc9d7b2012-12-03 18:36:09 +01001263 enum nl80211_reg_initiator initiator,
1264 struct ieee80211_supported_band *sband)
Johannes Berg8318d782008-01-24 19:38:38 +01001265{
Luis R. Rodrigueza92a3ce2009-01-07 17:43:33 -08001266 unsigned int i;
Luis R. Rodrigueza92a3ce2009-01-07 17:43:33 -08001267
Johannes Bergfdc9d7b2012-12-03 18:36:09 +01001268 if (!sband)
1269 return;
Johannes Berg8318d782008-01-24 19:38:38 +01001270
1271 for (i = 0; i < sband->n_channels; i++)
Johannes Bergfdc9d7b2012-12-03 18:36:09 +01001272 handle_channel(wiphy, initiator, &sband->channels[i]);
Johannes Berg8318d782008-01-24 19:38:38 +01001273}
1274
Luis R. Rodriguez57b5ce02012-07-12 11:49:18 -07001275static bool reg_request_cell_base(struct regulatory_request *request)
1276{
1277 if (request->initiator != NL80211_REGDOM_SET_BY_USER)
1278 return false;
Johannes Berg1a919312012-12-03 17:21:11 +01001279 return request->user_reg_hint_type == NL80211_USER_REG_HINT_CELL_BASE;
Luis R. Rodriguez57b5ce02012-07-12 11:49:18 -07001280}
1281
1282bool reg_last_request_cell_base(void)
1283{
Johannes Berg38fd2142013-05-10 19:17:17 +02001284 return reg_request_cell_base(get_last_request());
Luis R. Rodriguez57b5ce02012-07-12 11:49:18 -07001285}
1286
Ilan Peer94fc6612014-02-23 09:13:00 +02001287#ifdef CONFIG_CFG80211_REG_CELLULAR_HINTS
Luis R. Rodriguez57b5ce02012-07-12 11:49:18 -07001288/* Core specific check */
Johannes Berg2f922122012-12-03 17:54:55 +01001289static enum reg_request_treatment
1290reg_ignore_cell_hint(struct regulatory_request *pending_request)
Luis R. Rodriguez57b5ce02012-07-12 11:49:18 -07001291{
Johannes Bergc492db32012-12-06 16:29:25 +01001292 struct regulatory_request *lr = get_last_request();
Luis R. Rodriguez57b5ce02012-07-12 11:49:18 -07001293
Luis R. Rodriguez57b5ce02012-07-12 11:49:18 -07001294 if (!reg_num_devs_support_basehint)
Johannes Berg2f922122012-12-03 17:54:55 +01001295 return REG_REQ_IGNORE;
Luis R. Rodriguez57b5ce02012-07-12 11:49:18 -07001296
Johannes Bergc492db32012-12-06 16:29:25 +01001297 if (reg_request_cell_base(lr) &&
Johannes Berg1a919312012-12-03 17:21:11 +01001298 !regdom_changes(pending_request->alpha2))
Johannes Berg2f922122012-12-03 17:54:55 +01001299 return REG_REQ_ALREADY_SET;
Johannes Berg1a919312012-12-03 17:21:11 +01001300
Johannes Berg2f922122012-12-03 17:54:55 +01001301 return REG_REQ_OK;
Luis R. Rodriguez57b5ce02012-07-12 11:49:18 -07001302}
1303
1304/* Device specific check */
1305static bool reg_dev_ignore_cell_hint(struct wiphy *wiphy)
1306{
Johannes Berg1a919312012-12-03 17:21:11 +01001307 return !(wiphy->features & NL80211_FEATURE_CELL_BASE_REG_HINTS);
Luis R. Rodriguez57b5ce02012-07-12 11:49:18 -07001308}
1309#else
1310static int reg_ignore_cell_hint(struct regulatory_request *pending_request)
1311{
Johannes Berg2f922122012-12-03 17:54:55 +01001312 return REG_REQ_IGNORE;
Luis R. Rodriguez57b5ce02012-07-12 11:49:18 -07001313}
Johannes Berg1a919312012-12-03 17:21:11 +01001314
1315static bool reg_dev_ignore_cell_hint(struct wiphy *wiphy)
Luis R. Rodriguez57b5ce02012-07-12 11:49:18 -07001316{
1317 return true;
1318}
1319#endif
1320
Luis R. Rodriguezfa1fb9c2013-10-02 18:33:10 -07001321static bool wiphy_strict_alpha2_regd(struct wiphy *wiphy)
1322{
Luis R. Rodrigueza2f73b62013-11-11 22:15:29 +01001323 if (wiphy->regulatory_flags & REGULATORY_STRICT_REG &&
1324 !(wiphy->regulatory_flags & REGULATORY_CUSTOM_REG))
Luis R. Rodriguezfa1fb9c2013-10-02 18:33:10 -07001325 return true;
1326 return false;
1327}
Luis R. Rodriguez57b5ce02012-07-12 11:49:18 -07001328
Luis R. Rodriguez7db90f42009-03-09 22:07:41 -04001329static bool ignore_reg_update(struct wiphy *wiphy,
1330 enum nl80211_reg_initiator initiator)
Luis R. Rodriguez14b98152008-11-12 14:22:03 -08001331{
Johannes Bergc492db32012-12-06 16:29:25 +01001332 struct regulatory_request *lr = get_last_request();
1333
Jonathan Doronb0d7aa52014-12-15 19:26:00 +02001334 if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED)
1335 return true;
1336
Johannes Bergc492db32012-12-06 16:29:25 +01001337 if (!lr) {
Luis R. Rodriguez034c6d62013-10-14 17:42:06 -07001338 REG_DBG_PRINT("Ignoring regulatory request set by %s "
1339 "since last_request is not set\n",
Luis R. Rodriguez926a0a02010-10-21 19:17:03 +05301340 reg_initiator_name(initiator));
Luis R. Rodriguez14b98152008-11-12 14:22:03 -08001341 return true;
Luis R. Rodriguez926a0a02010-10-21 19:17:03 +05301342 }
1343
Luis R. Rodriguez7db90f42009-03-09 22:07:41 -04001344 if (initiator == NL80211_REGDOM_SET_BY_CORE &&
Luis R. Rodrigueza2f73b62013-11-11 22:15:29 +01001345 wiphy->regulatory_flags & REGULATORY_CUSTOM_REG) {
Luis R. Rodriguez034c6d62013-10-14 17:42:06 -07001346 REG_DBG_PRINT("Ignoring regulatory request set by %s "
1347 "since the driver uses its own custom "
1348 "regulatory domain\n",
Luis R. Rodriguez926a0a02010-10-21 19:17:03 +05301349 reg_initiator_name(initiator));
Luis R. Rodriguez14b98152008-11-12 14:22:03 -08001350 return true;
Luis R. Rodriguez926a0a02010-10-21 19:17:03 +05301351 }
1352
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -05001353 /*
1354 * wiphy->regd will be set once the device has its own
1355 * desired regulatory domain set
1356 */
Luis R. Rodriguezfa1fb9c2013-10-02 18:33:10 -07001357 if (wiphy_strict_alpha2_regd(wiphy) && !wiphy->regd &&
Luis R. Rodriguez749b5272010-10-20 10:18:54 -07001358 initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE &&
Johannes Bergc492db32012-12-06 16:29:25 +01001359 !is_world_regdom(lr->alpha2)) {
Luis R. Rodriguez034c6d62013-10-14 17:42:06 -07001360 REG_DBG_PRINT("Ignoring regulatory request set by %s "
1361 "since the driver requires its own regulatory "
1362 "domain to be set first\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
Johannes Bergc492db32012-12-06 16:29:25 +01001367 if (reg_request_cell_base(lr))
Luis R. Rodriguez57b5ce02012-07-12 11:49:18 -07001368 return reg_dev_ignore_cell_hint(wiphy);
1369
Luis R. Rodriguez14b98152008-11-12 14:22:03 -08001370 return false;
1371}
1372
Luis R. Rodriguez3195e482012-12-19 10:53:03 -08001373static bool reg_is_world_roaming(struct wiphy *wiphy)
1374{
1375 const struct ieee80211_regdomain *cr = get_cfg80211_regdom();
1376 const struct ieee80211_regdomain *wr = get_wiphy_regdom(wiphy);
1377 struct regulatory_request *lr = get_last_request();
1378
1379 if (is_world_regdom(cr->alpha2) || (wr && is_world_regdom(wr->alpha2)))
1380 return true;
1381
1382 if (lr && lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE &&
Luis R. Rodrigueza2f73b62013-11-11 22:15:29 +01001383 wiphy->regulatory_flags & REGULATORY_CUSTOM_REG)
Luis R. Rodriguez3195e482012-12-19 10:53:03 -08001384 return true;
1385
1386 return false;
1387}
1388
Johannes Berg1a919312012-12-03 17:21:11 +01001389static void handle_reg_beacon(struct wiphy *wiphy, unsigned int chan_idx,
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05001390 struct reg_beacon *reg_beacon)
1391{
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05001392 struct ieee80211_supported_band *sband;
1393 struct ieee80211_channel *chan;
Luis R. Rodriguez6bad8762009-04-02 14:08:09 -04001394 bool channel_changed = false;
1395 struct ieee80211_channel chan_before;
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05001396
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05001397 sband = wiphy->bands[reg_beacon->chan.band];
1398 chan = &sband->channels[chan_idx];
1399
1400 if (likely(chan->center_freq != reg_beacon->chan.center_freq))
1401 return;
1402
Luis R. Rodriguez6bad8762009-04-02 14:08:09 -04001403 if (chan->beacon_found)
1404 return;
1405
1406 chan->beacon_found = true;
1407
Luis R. Rodriguez0f500a52012-12-19 10:53:04 -08001408 if (!reg_is_world_roaming(wiphy))
1409 return;
1410
Luis R. Rodrigueza2f73b62013-11-11 22:15:29 +01001411 if (wiphy->regulatory_flags & REGULATORY_DISABLE_BEACON_HINTS)
Luis R. Rodriguez37184242009-07-30 17:43:48 -07001412 return;
1413
Luis R. Rodriguez6bad8762009-04-02 14:08:09 -04001414 chan_before.center_freq = chan->center_freq;
1415 chan_before.flags = chan->flags;
1416
Luis R. Rodriguez8fe02e12013-10-21 19:22:25 +02001417 if (chan->flags & IEEE80211_CHAN_NO_IR) {
1418 chan->flags &= ~IEEE80211_CHAN_NO_IR;
Luis R. Rodriguez6bad8762009-04-02 14:08:09 -04001419 channel_changed = true;
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05001420 }
1421
Luis R. Rodriguez6bad8762009-04-02 14:08:09 -04001422 if (channel_changed)
1423 nl80211_send_beacon_hint_event(wiphy, &chan_before, chan);
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05001424}
1425
1426/*
1427 * Called when a scan on a wiphy finds a beacon on
1428 * new channel
1429 */
1430static void wiphy_update_new_beacon(struct wiphy *wiphy,
1431 struct reg_beacon *reg_beacon)
1432{
1433 unsigned int i;
1434 struct ieee80211_supported_band *sband;
1435
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05001436 if (!wiphy->bands[reg_beacon->chan.band])
1437 return;
1438
1439 sband = wiphy->bands[reg_beacon->chan.band];
1440
1441 for (i = 0; i < sband->n_channels; i++)
1442 handle_reg_beacon(wiphy, i, reg_beacon);
1443}
1444
1445/*
1446 * Called upon reg changes or a new wiphy is added
1447 */
1448static void wiphy_update_beacon_reg(struct wiphy *wiphy)
1449{
1450 unsigned int i;
1451 struct ieee80211_supported_band *sband;
1452 struct reg_beacon *reg_beacon;
1453
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05001454 list_for_each_entry(reg_beacon, &reg_beacon_list, list) {
1455 if (!wiphy->bands[reg_beacon->chan.band])
1456 continue;
1457 sband = wiphy->bands[reg_beacon->chan.band];
1458 for (i = 0; i < sband->n_channels; i++)
1459 handle_reg_beacon(wiphy, i, reg_beacon);
1460 }
1461}
1462
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05001463/* Reap the advantages of previously found beacons */
1464static void reg_process_beacons(struct wiphy *wiphy)
1465{
Luis R. Rodriguezb1ed8dd2009-05-02 00:34:15 -04001466 /*
1467 * Means we are just firing up cfg80211, so no beacons would
1468 * have been processed yet.
1469 */
1470 if (!last_request)
1471 return;
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05001472 wiphy_update_beacon_reg(wiphy);
1473}
1474
Johannes Berg1a919312012-12-03 17:21:11 +01001475static bool is_ht40_allowed(struct ieee80211_channel *chan)
Luis R. Rodriguez038659e2009-05-02 00:37:17 -04001476{
1477 if (!chan)
Johannes Berg1a919312012-12-03 17:21:11 +01001478 return false;
Luis R. Rodriguez038659e2009-05-02 00:37:17 -04001479 if (chan->flags & IEEE80211_CHAN_DISABLED)
Johannes Berg1a919312012-12-03 17:21:11 +01001480 return false;
Luis R. Rodriguez038659e2009-05-02 00:37:17 -04001481 /* This would happen when regulatory rules disallow HT40 completely */
Felix Fietkau55b183a2013-01-11 14:22:58 +01001482 if ((chan->flags & IEEE80211_CHAN_NO_HT40) == IEEE80211_CHAN_NO_HT40)
1483 return false;
1484 return true;
Luis R. Rodriguez038659e2009-05-02 00:37:17 -04001485}
1486
1487static void reg_process_ht_flags_channel(struct wiphy *wiphy,
Johannes Bergfdc9d7b2012-12-03 18:36:09 +01001488 struct ieee80211_channel *channel)
Luis R. Rodriguez038659e2009-05-02 00:37:17 -04001489{
Johannes Bergfdc9d7b2012-12-03 18:36:09 +01001490 struct ieee80211_supported_band *sband = wiphy->bands[channel->band];
Luis R. Rodriguez038659e2009-05-02 00:37:17 -04001491 struct ieee80211_channel *channel_before = NULL, *channel_after = NULL;
1492 unsigned int i;
1493
Johannes Berg1a919312012-12-03 17:21:11 +01001494 if (!is_ht40_allowed(channel)) {
Luis R. Rodriguez038659e2009-05-02 00:37:17 -04001495 channel->flags |= IEEE80211_CHAN_NO_HT40;
1496 return;
1497 }
1498
1499 /*
1500 * We need to ensure the extension channels exist to
1501 * be able to use HT40- or HT40+, this finds them (or not)
1502 */
1503 for (i = 0; i < sband->n_channels; i++) {
1504 struct ieee80211_channel *c = &sband->channels[i];
Johannes Berg1a919312012-12-03 17:21:11 +01001505
Luis R. Rodriguez038659e2009-05-02 00:37:17 -04001506 if (c->center_freq == (channel->center_freq - 20))
1507 channel_before = c;
1508 if (c->center_freq == (channel->center_freq + 20))
1509 channel_after = c;
1510 }
1511
1512 /*
1513 * Please note that this assumes target bandwidth is 20 MHz,
1514 * if that ever changes we also need to change the below logic
1515 * to include that as well.
1516 */
Johannes Berg1a919312012-12-03 17:21:11 +01001517 if (!is_ht40_allowed(channel_before))
Luis R. Rodriguez689da1b2009-05-02 00:37:18 -04001518 channel->flags |= IEEE80211_CHAN_NO_HT40MINUS;
Luis R. Rodriguez038659e2009-05-02 00:37:17 -04001519 else
Luis R. Rodriguez689da1b2009-05-02 00:37:18 -04001520 channel->flags &= ~IEEE80211_CHAN_NO_HT40MINUS;
Luis R. Rodriguez038659e2009-05-02 00:37:17 -04001521
Johannes Berg1a919312012-12-03 17:21:11 +01001522 if (!is_ht40_allowed(channel_after))
Luis R. Rodriguez689da1b2009-05-02 00:37:18 -04001523 channel->flags |= IEEE80211_CHAN_NO_HT40PLUS;
Luis R. Rodriguez038659e2009-05-02 00:37:17 -04001524 else
Luis R. Rodriguez689da1b2009-05-02 00:37:18 -04001525 channel->flags &= ~IEEE80211_CHAN_NO_HT40PLUS;
Luis R. Rodriguez038659e2009-05-02 00:37:17 -04001526}
1527
1528static void reg_process_ht_flags_band(struct wiphy *wiphy,
Johannes Bergfdc9d7b2012-12-03 18:36:09 +01001529 struct ieee80211_supported_band *sband)
Luis R. Rodriguez038659e2009-05-02 00:37:17 -04001530{
1531 unsigned int i;
Luis R. Rodriguez038659e2009-05-02 00:37:17 -04001532
Johannes Bergfdc9d7b2012-12-03 18:36:09 +01001533 if (!sband)
1534 return;
Luis R. Rodriguez038659e2009-05-02 00:37:17 -04001535
1536 for (i = 0; i < sband->n_channels; i++)
Johannes Bergfdc9d7b2012-12-03 18:36:09 +01001537 reg_process_ht_flags_channel(wiphy, &sband->channels[i]);
Luis R. Rodriguez038659e2009-05-02 00:37:17 -04001538}
1539
1540static void reg_process_ht_flags(struct wiphy *wiphy)
1541{
1542 enum ieee80211_band band;
1543
1544 if (!wiphy)
1545 return;
1546
Johannes Bergfdc9d7b2012-12-03 18:36:09 +01001547 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
1548 reg_process_ht_flags_band(wiphy, wiphy->bands[band]);
Luis R. Rodriguez038659e2009-05-02 00:37:17 -04001549}
1550
Luis R. Rodriguez0e3802d2013-11-05 09:18:12 -08001551static void reg_call_notifier(struct wiphy *wiphy,
1552 struct regulatory_request *request)
1553{
1554 if (wiphy->reg_notifier)
1555 wiphy->reg_notifier(wiphy, request);
1556}
1557
Arik Nemtsovad932f02014-11-27 09:44:55 +02001558static bool reg_wdev_chan_valid(struct wiphy *wiphy, struct wireless_dev *wdev)
1559{
Arik Nemtsovad932f02014-11-27 09:44:55 +02001560 struct cfg80211_chan_def chandef;
1561 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
Arik Nemtsov20658702014-12-29 11:59:59 +02001562 enum nl80211_iftype iftype;
Arik Nemtsovad932f02014-11-27 09:44:55 +02001563
1564 wdev_lock(wdev);
Arik Nemtsov20658702014-12-29 11:59:59 +02001565 iftype = wdev->iftype;
Arik Nemtsovad932f02014-11-27 09:44:55 +02001566
Arik Nemtsov20658702014-12-29 11:59:59 +02001567 /* make sure the interface is active */
Arik Nemtsovad932f02014-11-27 09:44:55 +02001568 if (!wdev->netdev || !netif_running(wdev->netdev))
Arik Nemtsov20658702014-12-29 11:59:59 +02001569 goto wdev_inactive_unlock;
Arik Nemtsovad932f02014-11-27 09:44:55 +02001570
Arik Nemtsov20658702014-12-29 11:59:59 +02001571 switch (iftype) {
Arik Nemtsovad932f02014-11-27 09:44:55 +02001572 case NL80211_IFTYPE_AP:
1573 case NL80211_IFTYPE_P2P_GO:
1574 if (!wdev->beacon_interval)
Arik Nemtsov20658702014-12-29 11:59:59 +02001575 goto wdev_inactive_unlock;
1576 chandef = wdev->chandef;
Arik Nemtsovad932f02014-11-27 09:44:55 +02001577 break;
Arik Nemtsov185076d2014-12-03 18:08:17 +02001578 case NL80211_IFTYPE_ADHOC:
1579 if (!wdev->ssid_len)
Arik Nemtsov20658702014-12-29 11:59:59 +02001580 goto wdev_inactive_unlock;
1581 chandef = wdev->chandef;
Arik Nemtsov185076d2014-12-03 18:08:17 +02001582 break;
Arik Nemtsovad932f02014-11-27 09:44:55 +02001583 case NL80211_IFTYPE_STATION:
1584 case NL80211_IFTYPE_P2P_CLIENT:
Arik Nemtsovad932f02014-11-27 09:44:55 +02001585 if (!wdev->current_bss ||
1586 !wdev->current_bss->pub.channel)
Arik Nemtsov20658702014-12-29 11:59:59 +02001587 goto wdev_inactive_unlock;
Arik Nemtsovad932f02014-11-27 09:44:55 +02001588
Arik Nemtsov20658702014-12-29 11:59:59 +02001589 if (!rdev->ops->get_channel ||
1590 rdev_get_channel(rdev, wdev, &chandef))
1591 cfg80211_chandef_create(&chandef,
1592 wdev->current_bss->pub.channel,
1593 NL80211_CHAN_NO_HT);
Arik Nemtsovad932f02014-11-27 09:44:55 +02001594 break;
1595 case NL80211_IFTYPE_MONITOR:
1596 case NL80211_IFTYPE_AP_VLAN:
1597 case NL80211_IFTYPE_P2P_DEVICE:
1598 /* no enforcement required */
1599 break;
1600 default:
1601 /* others not implemented for now */
1602 WARN_ON(1);
1603 break;
1604 }
1605
Arik Nemtsovad932f02014-11-27 09:44:55 +02001606 wdev_unlock(wdev);
Arik Nemtsov20658702014-12-29 11:59:59 +02001607
1608 switch (iftype) {
1609 case NL80211_IFTYPE_AP:
1610 case NL80211_IFTYPE_P2P_GO:
1611 case NL80211_IFTYPE_ADHOC:
Arik Nemtsov923b3522015-07-08 15:41:44 +03001612 return cfg80211_reg_can_beacon_relax(wiphy, &chandef, iftype);
Arik Nemtsov20658702014-12-29 11:59:59 +02001613 case NL80211_IFTYPE_STATION:
1614 case NL80211_IFTYPE_P2P_CLIENT:
1615 return cfg80211_chandef_usable(wiphy, &chandef,
1616 IEEE80211_CHAN_DISABLED);
1617 default:
1618 break;
1619 }
1620
1621 return true;
1622
1623wdev_inactive_unlock:
1624 wdev_unlock(wdev);
1625 return true;
Arik Nemtsovad932f02014-11-27 09:44:55 +02001626}
1627
1628static void reg_leave_invalid_chans(struct wiphy *wiphy)
1629{
1630 struct wireless_dev *wdev;
1631 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
1632
1633 ASSERT_RTNL();
1634
1635 list_for_each_entry(wdev, &rdev->wdev_list, list)
1636 if (!reg_wdev_chan_valid(wiphy, wdev))
1637 cfg80211_leave(rdev, wdev);
1638}
1639
1640static void reg_check_chans_work(struct work_struct *work)
1641{
1642 struct cfg80211_registered_device *rdev;
1643
1644 REG_DBG_PRINT("Verifying active interfaces after reg change\n");
1645 rtnl_lock();
1646
1647 list_for_each_entry(rdev, &cfg80211_rdev_list, list)
1648 if (!(rdev->wiphy.regulatory_flags &
1649 REGULATORY_IGNORE_STALE_KICKOFF))
1650 reg_leave_invalid_chans(&rdev->wiphy);
1651
1652 rtnl_unlock();
1653}
1654
1655static void reg_check_channels(void)
1656{
1657 /*
1658 * Give usermode a chance to do something nicer (move to another
1659 * channel, orderly disconnection), before forcing a disconnection.
1660 */
1661 mod_delayed_work(system_power_efficient_wq,
1662 &reg_check_chans,
1663 msecs_to_jiffies(REG_ENFORCE_GRACE_MS));
1664}
1665
Sven Neumanneac03e32011-08-30 23:38:53 +02001666static void wiphy_update_regulatory(struct wiphy *wiphy,
1667 enum nl80211_reg_initiator initiator)
Johannes Berg8318d782008-01-24 19:38:38 +01001668{
1669 enum ieee80211_band band;
Johannes Bergc492db32012-12-06 16:29:25 +01001670 struct regulatory_request *lr = get_last_request();
Sven Neumanneac03e32011-08-30 23:38:53 +02001671
Luis R. Rodriguez0e3802d2013-11-05 09:18:12 -08001672 if (ignore_reg_update(wiphy, initiator)) {
1673 /*
1674 * Regulatory updates set by CORE are ignored for custom
1675 * regulatory cards. Let us notify the changes to the driver,
1676 * as some drivers used this to restore its orig_* reg domain.
1677 */
1678 if (initiator == NL80211_REGDOM_SET_BY_CORE &&
Luis R. Rodrigueza2f73b62013-11-11 22:15:29 +01001679 wiphy->regulatory_flags & REGULATORY_CUSTOM_REG)
Luis R. Rodriguez0e3802d2013-11-05 09:18:12 -08001680 reg_call_notifier(wiphy, lr);
Sven Neumanna203c2a2011-07-12 15:52:07 +02001681 return;
Luis R. Rodriguez0e3802d2013-11-05 09:18:12 -08001682 }
Sven Neumanna203c2a2011-07-12 15:52:07 +02001683
Johannes Bergc492db32012-12-06 16:29:25 +01001684 lr->dfs_region = get_cfg80211_regdom()->dfs_region;
Luis R. Rodriguezb68e6b32011-10-11 10:59:03 -07001685
Johannes Bergfdc9d7b2012-12-03 18:36:09 +01001686 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
1687 handle_band(wiphy, initiator, wiphy->bands[band]);
Sven Neumanna203c2a2011-07-12 15:52:07 +02001688
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05001689 reg_process_beacons(wiphy);
Luis R. Rodriguez038659e2009-05-02 00:37:17 -04001690 reg_process_ht_flags(wiphy);
Luis R. Rodriguez0e3802d2013-11-05 09:18:12 -08001691 reg_call_notifier(wiphy, lr);
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07001692}
1693
Sven Neumannd7549cb2011-08-30 23:38:54 +02001694static void update_all_wiphy_regulatory(enum nl80211_reg_initiator initiator)
1695{
1696 struct cfg80211_registered_device *rdev;
Rajkumar Manoharan4a389942011-12-08 23:59:26 +05301697 struct wiphy *wiphy;
Sven Neumannd7549cb2011-08-30 23:38:54 +02001698
Johannes Berg5fe231e2013-05-08 21:45:15 +02001699 ASSERT_RTNL();
Johannes Berg458f4f92012-12-06 15:47:38 +01001700
Rajkumar Manoharan4a389942011-12-08 23:59:26 +05301701 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
1702 wiphy = &rdev->wiphy;
1703 wiphy_update_regulatory(wiphy, initiator);
Rajkumar Manoharan4a389942011-12-08 23:59:26 +05301704 }
Arik Nemtsovad932f02014-11-27 09:44:55 +02001705
1706 reg_check_channels();
Sven Neumannd7549cb2011-08-30 23:38:54 +02001707}
1708
Luis R. Rodriguez1fa25e42009-01-22 15:05:44 -08001709static void handle_channel_custom(struct wiphy *wiphy,
Johannes Bergfdc9d7b2012-12-03 18:36:09 +01001710 struct ieee80211_channel *chan,
Luis R. Rodriguez1fa25e42009-01-22 15:05:44 -08001711 const struct ieee80211_regdomain *regd)
1712{
Luis R. Rodriguez038659e2009-05-02 00:37:17 -04001713 u32 bw_flags = 0;
Luis R. Rodriguez1fa25e42009-01-22 15:05:44 -08001714 const struct ieee80211_reg_rule *reg_rule = NULL;
1715 const struct ieee80211_power_rule *power_rule = NULL;
Luis R. Rodriguez038659e2009-05-02 00:37:17 -04001716 const struct ieee80211_freq_range *freq_range = NULL;
Janusz Dziedzic97524822014-01-30 09:52:20 +01001717 u32 max_bandwidth_khz;
Matthias May4edd5692015-07-17 15:28:39 +02001718 u32 bw;
Luis R. Rodriguez1fa25e42009-01-22 15:05:44 -08001719
Matthias May4edd5692015-07-17 15:28:39 +02001720 for (bw = MHZ_TO_KHZ(20); bw >= MHZ_TO_KHZ(5); bw = bw / 2) {
1721 reg_rule = freq_reg_info_regd(wiphy,
1722 MHZ_TO_KHZ(chan->center_freq),
1723 regd, bw);
1724 if (!IS_ERR(reg_rule))
1725 break;
1726 }
Luis R. Rodriguezac46d482009-05-01 18:44:50 -04001727
Johannes Berg361c9c82012-12-06 15:57:14 +01001728 if (IS_ERR(reg_rule)) {
Johannes Bergfe7ef5e2012-12-04 15:07:34 +01001729 REG_DBG_PRINT("Disabling freq %d MHz as custom regd has no rule that fits it\n",
1730 chan->center_freq);
Arik Nemtsovdb8dfee2014-12-15 19:26:02 +02001731 if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) {
1732 chan->flags |= IEEE80211_CHAN_DISABLED;
1733 } else {
1734 chan->orig_flags |= IEEE80211_CHAN_DISABLED;
1735 chan->flags = chan->orig_flags;
1736 }
Luis R. Rodriguez1fa25e42009-01-22 15:05:44 -08001737 return;
1738 }
1739
Janusz Dziedzicb0dfd2e2014-02-20 13:52:16 +01001740 chan_reg_rule_print_dbg(regd, chan, reg_rule);
Luis R. Rodrigueze702d3c2010-10-21 19:17:04 +05301741
Luis R. Rodriguez1fa25e42009-01-22 15:05:44 -08001742 power_rule = &reg_rule->power_rule;
Luis R. Rodriguez038659e2009-05-02 00:37:17 -04001743 freq_range = &reg_rule->freq_range;
Luis R. Rodriguez1fa25e42009-01-22 15:05:44 -08001744
Janusz Dziedzic97524822014-01-30 09:52:20 +01001745 max_bandwidth_khz = freq_range->max_bandwidth_khz;
1746 /* Check if auto calculation requested */
Janusz Dziedzicb0dfd2e2014-02-20 13:52:16 +01001747 if (reg_rule->flags & NL80211_RRF_AUTO_BW)
Janusz Dziedzic97524822014-01-30 09:52:20 +01001748 max_bandwidth_khz = reg_get_max_bandwidth(regd, reg_rule);
1749
Matthias May4edd5692015-07-17 15:28:39 +02001750 /* If we get a reg_rule we can assume that at least 5Mhz fit */
1751 if (!reg_does_bw_fit(freq_range, MHZ_TO_KHZ(chan->center_freq),
1752 MHZ_TO_KHZ(10)))
1753 bw_flags |= IEEE80211_CHAN_NO_10MHZ;
1754 if (!reg_does_bw_fit(freq_range, MHZ_TO_KHZ(chan->center_freq),
1755 MHZ_TO_KHZ(20)))
1756 bw_flags |= IEEE80211_CHAN_NO_20MHZ;
1757
1758 if (max_bandwidth_khz < MHZ_TO_KHZ(10))
1759 bw_flags |= IEEE80211_CHAN_NO_10MHZ;
1760 if (max_bandwidth_khz < MHZ_TO_KHZ(20))
1761 bw_flags |= IEEE80211_CHAN_NO_20MHZ;
Janusz Dziedzic97524822014-01-30 09:52:20 +01001762 if (max_bandwidth_khz < MHZ_TO_KHZ(40))
Matthias May4edd5692015-07-17 15:28:39 +02001763 bw_flags |= IEEE80211_CHAN_NO_HT40;
Janusz Dziedzic97524822014-01-30 09:52:20 +01001764 if (max_bandwidth_khz < MHZ_TO_KHZ(80))
Johannes Bergc7a6ee22012-12-12 17:50:39 +01001765 bw_flags |= IEEE80211_CHAN_NO_80MHZ;
Janusz Dziedzic97524822014-01-30 09:52:20 +01001766 if (max_bandwidth_khz < MHZ_TO_KHZ(160))
Johannes Bergc7a6ee22012-12-12 17:50:39 +01001767 bw_flags |= IEEE80211_CHAN_NO_160MHZ;
Luis R. Rodriguez038659e2009-05-02 00:37:17 -04001768
Arik Nemtsov2e18b382014-11-16 16:37:46 +02001769 chan->dfs_state_entered = jiffies;
Arik Nemtsovc7ab5082014-11-16 16:37:47 +02001770 chan->dfs_state = NL80211_DFS_USABLE;
1771
1772 chan->beacon_found = false;
Arik Nemtsovdb8dfee2014-12-15 19:26:02 +02001773
1774 if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED)
1775 chan->flags = chan->orig_flags | bw_flags |
1776 map_regdom_flags(reg_rule->flags);
1777 else
1778 chan->flags |= map_regdom_flags(reg_rule->flags) | bw_flags;
1779
Luis R. Rodriguez1fa25e42009-01-22 15:05:44 -08001780 chan->max_antenna_gain = (int) MBI_TO_DBI(power_rule->max_antenna_gain);
Felix Fietkau279f0f52012-10-17 13:56:20 +02001781 chan->max_reg_power = chan->max_power =
1782 (int) MBM_TO_DBM(power_rule->max_eirp);
Arik Nemtsov2e18b382014-11-16 16:37:46 +02001783
1784 if (chan->flags & IEEE80211_CHAN_RADAR) {
1785 if (reg_rule->dfs_cac_ms)
1786 chan->dfs_cac_ms = reg_rule->dfs_cac_ms;
1787 else
1788 chan->dfs_cac_ms = IEEE80211_DFS_MIN_CAC_TIME_MS;
1789 }
1790
1791 chan->max_power = chan->max_reg_power;
Luis R. Rodriguez1fa25e42009-01-22 15:05:44 -08001792}
1793
Johannes Bergfdc9d7b2012-12-03 18:36:09 +01001794static void handle_band_custom(struct wiphy *wiphy,
1795 struct ieee80211_supported_band *sband,
Luis R. Rodriguez1fa25e42009-01-22 15:05:44 -08001796 const struct ieee80211_regdomain *regd)
1797{
1798 unsigned int i;
Luis R. Rodriguez1fa25e42009-01-22 15:05:44 -08001799
Johannes Bergfdc9d7b2012-12-03 18:36:09 +01001800 if (!sband)
1801 return;
Luis R. Rodriguez1fa25e42009-01-22 15:05:44 -08001802
1803 for (i = 0; i < sband->n_channels; i++)
Johannes Bergfdc9d7b2012-12-03 18:36:09 +01001804 handle_channel_custom(wiphy, &sband->channels[i], regd);
Luis R. Rodriguez1fa25e42009-01-22 15:05:44 -08001805}
1806
1807/* Used by drivers prior to wiphy registration */
1808void wiphy_apply_custom_regulatory(struct wiphy *wiphy,
1809 const struct ieee80211_regdomain *regd)
1810{
1811 enum ieee80211_band band;
Luis R. Rodriguezbbcf3f02009-05-19 17:49:47 -04001812 unsigned int bands_set = 0;
Luis R. Rodriguezac46d482009-05-01 18:44:50 -04001813
Luis R. Rodrigueza2f73b62013-11-11 22:15:29 +01001814 WARN(!(wiphy->regulatory_flags & REGULATORY_CUSTOM_REG),
1815 "wiphy should have REGULATORY_CUSTOM_REG\n");
1816 wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG;
Luis R. Rodriguez222ea582013-11-05 09:18:00 -08001817
Luis R. Rodriguez1fa25e42009-01-22 15:05:44 -08001818 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
Luis R. Rodriguezbbcf3f02009-05-19 17:49:47 -04001819 if (!wiphy->bands[band])
1820 continue;
Johannes Bergfdc9d7b2012-12-03 18:36:09 +01001821 handle_band_custom(wiphy, wiphy->bands[band], regd);
Luis R. Rodriguezbbcf3f02009-05-19 17:49:47 -04001822 bands_set++;
Luis R. Rodriguez1fa25e42009-01-22 15:05:44 -08001823 }
Luis R. Rodriguezbbcf3f02009-05-19 17:49:47 -04001824
1825 /*
1826 * no point in calling this if it won't have any effect
Johannes Berg1a919312012-12-03 17:21:11 +01001827 * on your device's supported bands.
Luis R. Rodriguezbbcf3f02009-05-19 17:49:47 -04001828 */
1829 WARN_ON(!bands_set);
Luis R. Rodriguez1fa25e42009-01-22 15:05:44 -08001830}
1831EXPORT_SYMBOL(wiphy_apply_custom_regulatory);
1832
Luis R. Rodriguezb2e253c2010-11-17 21:46:09 -08001833static void reg_set_request_processed(void)
1834{
1835 bool need_more_processing = false;
Johannes Bergc492db32012-12-06 16:29:25 +01001836 struct regulatory_request *lr = get_last_request();
Luis R. Rodriguezb2e253c2010-11-17 21:46:09 -08001837
Johannes Bergc492db32012-12-06 16:29:25 +01001838 lr->processed = true;
Luis R. Rodriguezb2e253c2010-11-17 21:46:09 -08001839
1840 spin_lock(&reg_requests_lock);
1841 if (!list_empty(&reg_requests_list))
1842 need_more_processing = true;
1843 spin_unlock(&reg_requests_lock);
1844
Ilan peereeca9fc2015-03-04 00:32:07 -05001845 cancel_delayed_work(&reg_timeout);
Luis R. Rodrigueza90c7a32011-04-05 10:49:04 -07001846
Luis R. Rodriguezb2e253c2010-11-17 21:46:09 -08001847 if (need_more_processing)
1848 schedule_work(&reg_work);
1849}
1850
Luis R. Rodriguezd1c96a92009-02-21 00:24:13 -05001851/**
Luis R. Rodriguezb3eb7f32013-11-05 09:18:03 -08001852 * reg_process_hint_core - process core regulatory requests
1853 * @pending_request: a pending core regulatory request
1854 *
1855 * The wireless subsystem can use this function to process
1856 * a regulatory request issued by the regulatory core.
Luis R. Rodriguezb3eb7f32013-11-05 09:18:03 -08001857 */
Johannes Berg25b20db2015-10-15 12:05:05 +02001858static void reg_process_hint_core(struct regulatory_request *core_request)
Luis R. Rodriguezb3eb7f32013-11-05 09:18:03 -08001859{
Johannes Berg25b20db2015-10-15 12:05:05 +02001860 if (reg_call_crda(core_request)) {
1861 core_request->intersect = false;
1862 core_request->processed = false;
1863 reg_update_last_request(core_request);
1864 }
Luis R. Rodriguezb3eb7f32013-11-05 09:18:03 -08001865}
1866
Luis R. Rodriguez0d97a612013-11-05 09:18:04 -08001867static enum reg_request_treatment
1868__reg_process_hint_user(struct regulatory_request *user_request)
1869{
1870 struct regulatory_request *lr = get_last_request();
1871
1872 if (reg_request_cell_base(user_request))
1873 return reg_ignore_cell_hint(user_request);
1874
1875 if (reg_request_cell_base(lr))
1876 return REG_REQ_IGNORE;
1877
1878 if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE)
1879 return REG_REQ_INTERSECT;
1880 /*
1881 * If the user knows better the user should set the regdom
1882 * to their country before the IE is picked up
1883 */
1884 if (lr->initiator == NL80211_REGDOM_SET_BY_USER &&
1885 lr->intersect)
1886 return REG_REQ_IGNORE;
1887 /*
1888 * Process user requests only after previous user/driver/core
1889 * requests have been processed
1890 */
1891 if ((lr->initiator == NL80211_REGDOM_SET_BY_CORE ||
1892 lr->initiator == NL80211_REGDOM_SET_BY_DRIVER ||
1893 lr->initiator == NL80211_REGDOM_SET_BY_USER) &&
1894 regdom_changes(lr->alpha2))
1895 return REG_REQ_IGNORE;
1896
1897 if (!regdom_changes(user_request->alpha2))
1898 return REG_REQ_ALREADY_SET;
1899
1900 return REG_REQ_OK;
1901}
1902
1903/**
1904 * reg_process_hint_user - process user regulatory requests
1905 * @user_request: a pending user regulatory request
1906 *
1907 * The wireless subsystem can use this function to process
1908 * a regulatory request initiated by userspace.
Luis R. Rodriguez0d97a612013-11-05 09:18:04 -08001909 */
Johannes Berg25b20db2015-10-15 12:05:05 +02001910static void reg_process_hint_user(struct regulatory_request *user_request)
Luis R. Rodriguez0d97a612013-11-05 09:18:04 -08001911{
1912 enum reg_request_treatment treatment;
Luis R. Rodriguez0d97a612013-11-05 09:18:04 -08001913
1914 treatment = __reg_process_hint_user(user_request);
1915 if (treatment == REG_REQ_IGNORE ||
Ilan peer0c4ddcd2015-03-04 00:32:05 -05001916 treatment == REG_REQ_ALREADY_SET) {
Arik Nemtsovc8883932014-04-21 20:39:34 -07001917 reg_free_request(user_request);
Johannes Berg25b20db2015-10-15 12:05:05 +02001918 return;
Luis R. Rodriguez0d97a612013-11-05 09:18:04 -08001919 }
1920
Luis R. Rodriguez0d97a612013-11-05 09:18:04 -08001921 user_request->intersect = treatment == REG_REQ_INTERSECT;
1922 user_request->processed = false;
Luis R. Rodriguez5ad6ef52013-11-05 09:18:08 -08001923
Johannes Berg25b20db2015-10-15 12:05:05 +02001924 if (reg_call_crda(user_request)) {
1925 reg_update_last_request(user_request);
1926 user_alpha2[0] = user_request->alpha2[0];
1927 user_alpha2[1] = user_request->alpha2[1];
1928 } else {
1929 reg_free_request(user_request);
1930 }
Luis R. Rodriguez0d97a612013-11-05 09:18:04 -08001931}
1932
Luis R. Rodriguez21636c72013-11-05 09:18:05 -08001933static enum reg_request_treatment
1934__reg_process_hint_driver(struct regulatory_request *driver_request)
1935{
1936 struct regulatory_request *lr = get_last_request();
1937
1938 if (lr->initiator == NL80211_REGDOM_SET_BY_CORE) {
1939 if (regdom_changes(driver_request->alpha2))
1940 return REG_REQ_OK;
1941 return REG_REQ_ALREADY_SET;
1942 }
1943
1944 /*
1945 * This would happen if you unplug and plug your card
1946 * back in or if you add a new device for which the previously
1947 * loaded card also agrees on the regulatory domain.
1948 */
1949 if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER &&
1950 !regdom_changes(driver_request->alpha2))
1951 return REG_REQ_ALREADY_SET;
1952
1953 return REG_REQ_INTERSECT;
1954}
1955
1956/**
1957 * reg_process_hint_driver - process driver regulatory requests
1958 * @driver_request: a pending driver regulatory request
1959 *
1960 * The wireless subsystem can use this function to process
1961 * a regulatory request issued by an 802.11 driver.
1962 *
1963 * Returns one of the different reg request treatment values.
1964 */
1965static enum reg_request_treatment
1966reg_process_hint_driver(struct wiphy *wiphy,
1967 struct regulatory_request *driver_request)
1968{
Arik Nemtsov34f05f52014-12-04 12:22:16 +02001969 const struct ieee80211_regdomain *regd, *tmp;
Luis R. Rodriguez21636c72013-11-05 09:18:05 -08001970 enum reg_request_treatment treatment;
Luis R. Rodriguez21636c72013-11-05 09:18:05 -08001971
1972 treatment = __reg_process_hint_driver(driver_request);
1973
1974 switch (treatment) {
1975 case REG_REQ_OK:
1976 break;
1977 case REG_REQ_IGNORE:
Arik Nemtsovc8883932014-04-21 20:39:34 -07001978 reg_free_request(driver_request);
Luis R. Rodriguez21636c72013-11-05 09:18:05 -08001979 return treatment;
1980 case REG_REQ_INTERSECT:
1981 /* fall through */
1982 case REG_REQ_ALREADY_SET:
1983 regd = reg_copy_regd(get_cfg80211_regdom());
1984 if (IS_ERR(regd)) {
Arik Nemtsovc8883932014-04-21 20:39:34 -07001985 reg_free_request(driver_request);
Luis R. Rodriguez21636c72013-11-05 09:18:05 -08001986 return REG_REQ_IGNORE;
1987 }
Arik Nemtsov34f05f52014-12-04 12:22:16 +02001988
1989 tmp = get_wiphy_regdom(wiphy);
Luis R. Rodriguez21636c72013-11-05 09:18:05 -08001990 rcu_assign_pointer(wiphy->regd, regd);
Arik Nemtsov34f05f52014-12-04 12:22:16 +02001991 rcu_free_regdom(tmp);
Luis R. Rodriguez21636c72013-11-05 09:18:05 -08001992 }
1993
Luis R. Rodriguez21636c72013-11-05 09:18:05 -08001994
1995 driver_request->intersect = treatment == REG_REQ_INTERSECT;
1996 driver_request->processed = false;
Luis R. Rodriguez5ad6ef52013-11-05 09:18:08 -08001997
Luis R. Rodriguez21636c72013-11-05 09:18:05 -08001998 /*
1999 * Since CRDA will not be called in this case as we already
2000 * have applied the requested regulatory domain before we just
2001 * inform userspace we have processed the request
2002 */
2003 if (treatment == REG_REQ_ALREADY_SET) {
2004 nl80211_send_reg_change_event(driver_request);
Johannes Berg25b20db2015-10-15 12:05:05 +02002005 reg_update_last_request(driver_request);
Luis R. Rodriguez21636c72013-11-05 09:18:05 -08002006 reg_set_request_processed();
2007 return treatment;
2008 }
2009
Johannes Berg25b20db2015-10-15 12:05:05 +02002010 if (reg_call_crda(driver_request))
2011 reg_update_last_request(driver_request);
2012 else
2013 reg_free_request(driver_request);
2014
2015 return REG_REQ_OK;
Luis R. Rodriguez21636c72013-11-05 09:18:05 -08002016}
2017
Luis R. Rodriguezb23e7a92013-11-05 09:18:06 -08002018static enum reg_request_treatment
2019__reg_process_hint_country_ie(struct wiphy *wiphy,
2020 struct regulatory_request *country_ie_request)
2021{
2022 struct wiphy *last_wiphy = NULL;
2023 struct regulatory_request *lr = get_last_request();
2024
2025 if (reg_request_cell_base(lr)) {
2026 /* Trust a Cell base station over the AP's country IE */
2027 if (regdom_changes(country_ie_request->alpha2))
2028 return REG_REQ_IGNORE;
2029 return REG_REQ_ALREADY_SET;
Luis R. Rodriguez2a901462013-11-11 22:15:31 +01002030 } else {
2031 if (wiphy->regulatory_flags & REGULATORY_COUNTRY_IE_IGNORE)
2032 return REG_REQ_IGNORE;
Luis R. Rodriguezb23e7a92013-11-05 09:18:06 -08002033 }
2034
Luis R. Rodriguezb23e7a92013-11-05 09:18:06 -08002035 if (unlikely(!is_an_alpha2(country_ie_request->alpha2)))
2036 return -EINVAL;
Luis R. Rodriguez2f1c6c52013-11-05 09:18:07 -08002037
2038 if (lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE)
2039 return REG_REQ_OK;
2040
2041 last_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx);
2042
2043 if (last_wiphy != wiphy) {
Luis R. Rodriguezb23e7a92013-11-05 09:18:06 -08002044 /*
Luis R. Rodriguez2f1c6c52013-11-05 09:18:07 -08002045 * Two cards with two APs claiming different
2046 * Country IE alpha2s. We could
2047 * intersect them, but that seems unlikely
2048 * to be correct. Reject second one for now.
Luis R. Rodriguezb23e7a92013-11-05 09:18:06 -08002049 */
Luis R. Rodriguez2f1c6c52013-11-05 09:18:07 -08002050 if (regdom_changes(country_ie_request->alpha2))
2051 return REG_REQ_IGNORE;
Luis R. Rodriguezb23e7a92013-11-05 09:18:06 -08002052 return REG_REQ_ALREADY_SET;
2053 }
Emmanuel Grumbach70dcec52014-12-02 09:53:25 +02002054
2055 if (regdom_changes(country_ie_request->alpha2))
Luis R. Rodriguez2f1c6c52013-11-05 09:18:07 -08002056 return REG_REQ_OK;
2057 return REG_REQ_ALREADY_SET;
Luis R. Rodriguezb23e7a92013-11-05 09:18:06 -08002058}
2059
Luis R. Rodriguezb3eb7f32013-11-05 09:18:03 -08002060/**
Luis R. Rodriguezb23e7a92013-11-05 09:18:06 -08002061 * reg_process_hint_country_ie - process regulatory requests from country IEs
2062 * @country_ie_request: a regulatory request from a country IE
Luis R. Rodriguezd1c96a92009-02-21 00:24:13 -05002063 *
Luis R. Rodriguezb23e7a92013-11-05 09:18:06 -08002064 * The wireless subsystem can use this function to process
2065 * a regulatory request issued by a country Information Element.
Luis R. Rodriguezd1c96a92009-02-21 00:24:13 -05002066 *
Johannes Berg2f922122012-12-03 17:54:55 +01002067 * Returns one of the different reg request treatment values.
Luis R. Rodriguezd1c96a92009-02-21 00:24:13 -05002068 */
Johannes Berg2f922122012-12-03 17:54:55 +01002069static enum reg_request_treatment
Luis R. Rodriguezb23e7a92013-11-05 09:18:06 -08002070reg_process_hint_country_ie(struct wiphy *wiphy,
2071 struct regulatory_request *country_ie_request)
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002072{
Johannes Berg2f922122012-12-03 17:54:55 +01002073 enum reg_request_treatment treatment;
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002074
Luis R. Rodriguezb23e7a92013-11-05 09:18:06 -08002075 treatment = __reg_process_hint_country_ie(wiphy, country_ie_request);
Luis R. Rodriguez761cf7e2009-02-21 00:04:25 -05002076
Johannes Berg2f922122012-12-03 17:54:55 +01002077 switch (treatment) {
Johannes Berg2f922122012-12-03 17:54:55 +01002078 case REG_REQ_OK:
2079 break;
Luis R. Rodriguezb23e7a92013-11-05 09:18:06 -08002080 case REG_REQ_IGNORE:
2081 /* fall through */
2082 case REG_REQ_ALREADY_SET:
Arik Nemtsovc8883932014-04-21 20:39:34 -07002083 reg_free_request(country_ie_request);
Johannes Berg2f922122012-12-03 17:54:55 +01002084 return treatment;
Luis R. Rodriguezb23e7a92013-11-05 09:18:06 -08002085 case REG_REQ_INTERSECT:
Arik Nemtsovc8883932014-04-21 20:39:34 -07002086 reg_free_request(country_ie_request);
Luis R. Rodriguezb23e7a92013-11-05 09:18:06 -08002087 /*
2088 * This doesn't happen yet, not sure we
2089 * ever want to support it for this case.
2090 */
2091 WARN_ONCE(1, "Unexpected intersection for country IEs");
2092 return REG_REQ_IGNORE;
Luis R. Rodriguez3e0c3ff2009-01-07 17:43:34 -08002093 }
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002094
Luis R. Rodriguezb23e7a92013-11-05 09:18:06 -08002095 country_ie_request->intersect = false;
2096 country_ie_request->processed = false;
Luis R. Rodriguez5ad6ef52013-11-05 09:18:08 -08002097
Johannes Berg25b20db2015-10-15 12:05:05 +02002098 if (reg_call_crda(country_ie_request))
2099 reg_update_last_request(country_ie_request);
2100 else
2101 reg_free_request(country_ie_request);
Luis R. Rodriguezd951c1d2009-02-21 00:24:15 -05002102
Johannes Berg25b20db2015-10-15 12:05:05 +02002103 return REG_REQ_OK;
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002104}
2105
Luis R. Rodriguez30a548c2009-05-02 01:17:27 -04002106/* This processes *all* regulatory hints */
Luis R. Rodriguez1daa37c2013-11-05 09:18:02 -08002107static void reg_process_hint(struct regulatory_request *reg_request)
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002108{
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002109 struct wiphy *wiphy = NULL;
Luis R. Rodriguezb3eb7f32013-11-05 09:18:03 -08002110 enum reg_request_treatment treatment;
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002111
Johannes Bergf4173762012-12-03 18:23:37 +01002112 if (reg_request->wiphy_idx != WIPHY_IDX_INVALID)
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002113 wiphy = wiphy_idx_to_wiphy(reg_request->wiphy_idx);
2114
Luis R. Rodriguezb3eb7f32013-11-05 09:18:03 -08002115 switch (reg_request->initiator) {
2116 case NL80211_REGDOM_SET_BY_CORE:
2117 reg_process_hint_core(reg_request);
2118 return;
2119 case NL80211_REGDOM_SET_BY_USER:
John Linville841b3512015-06-24 11:42:25 -04002120 reg_process_hint_user(reg_request);
Luis R. Rodriguez0d97a612013-11-05 09:18:04 -08002121 return;
Luis R. Rodriguezb3eb7f32013-11-05 09:18:03 -08002122 case NL80211_REGDOM_SET_BY_DRIVER:
Ilan Peer772f0382014-01-14 15:17:23 +02002123 if (!wiphy)
2124 goto out_free;
Luis R. Rodriguez21636c72013-11-05 09:18:05 -08002125 treatment = reg_process_hint_driver(wiphy, reg_request);
2126 break;
Luis R. Rodriguezb3eb7f32013-11-05 09:18:03 -08002127 case NL80211_REGDOM_SET_BY_COUNTRY_IE:
Ilan Peer772f0382014-01-14 15:17:23 +02002128 if (!wiphy)
2129 goto out_free;
Luis R. Rodriguezb23e7a92013-11-05 09:18:06 -08002130 treatment = reg_process_hint_country_ie(wiphy, reg_request);
Luis R. Rodriguezb3eb7f32013-11-05 09:18:03 -08002131 break;
2132 default:
2133 WARN(1, "invalid initiator %d\n", reg_request->initiator);
Ilan Peer772f0382014-01-14 15:17:23 +02002134 goto out_free;
Luis R. Rodriguezb3eb7f32013-11-05 09:18:03 -08002135 }
2136
John Linville841b3512015-06-24 11:42:25 -04002137 /* This is required so that the orig_* parameters are saved.
2138 * NOTE: treatment must be set for any case that reaches here!
2139 */
Luis R. Rodriguezb23e7a92013-11-05 09:18:06 -08002140 if (treatment == REG_REQ_ALREADY_SET && wiphy &&
Arik Nemtsovad932f02014-11-27 09:44:55 +02002141 wiphy->regulatory_flags & REGULATORY_STRICT_REG) {
Luis R. Rodriguezb23e7a92013-11-05 09:18:06 -08002142 wiphy_update_regulatory(wiphy, reg_request->initiator);
Arik Nemtsovad932f02014-11-27 09:44:55 +02002143 reg_check_channels();
2144 }
Ilan Peer772f0382014-01-14 15:17:23 +02002145
2146 return;
2147
2148out_free:
Arik Nemtsovc8883932014-04-21 20:39:34 -07002149 reg_free_request(reg_request);
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002150}
2151
Arik Nemtsovef51fb12015-01-07 16:47:20 +02002152static bool reg_only_self_managed_wiphys(void)
2153{
2154 struct cfg80211_registered_device *rdev;
2155 struct wiphy *wiphy;
2156 bool self_managed_found = false;
2157
2158 ASSERT_RTNL();
2159
2160 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
2161 wiphy = &rdev->wiphy;
2162 if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED)
2163 self_managed_found = true;
2164 else
2165 return false;
2166 }
2167
2168 /* make sure at least one self-managed wiphy exists */
2169 return self_managed_found;
2170}
2171
Luis R. Rodriguezb2e253c2010-11-17 21:46:09 -08002172/*
2173 * Processes regulatory hints, this is all the NL80211_REGDOM_SET_BY_*
2174 * Regulatory hints come on a first come first serve basis and we
2175 * must process each one atomically.
2176 */
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002177static void reg_process_pending_hints(void)
Luis R. Rodriguezb0e28802010-11-17 21:46:08 -08002178{
Johannes Bergc492db32012-12-06 16:29:25 +01002179 struct regulatory_request *reg_request, *lr;
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002180
Johannes Bergc492db32012-12-06 16:29:25 +01002181 lr = get_last_request();
Luis R. Rodriguezb0e28802010-11-17 21:46:08 -08002182
Luis R. Rodriguezb2e253c2010-11-17 21:46:09 -08002183 /* When last_request->processed becomes true this will be rescheduled */
Johannes Bergc492db32012-12-06 16:29:25 +01002184 if (lr && !lr->processed) {
Luis R. Rodriguez96cce122014-04-21 20:39:35 -07002185 reg_process_hint(lr);
Johannes Berg5fe231e2013-05-08 21:45:15 +02002186 return;
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002187 }
Luis R. Rodriguezb2e253c2010-11-17 21:46:09 -08002188
2189 spin_lock(&reg_requests_lock);
2190
2191 if (list_empty(&reg_requests_list)) {
2192 spin_unlock(&reg_requests_lock);
Johannes Berg5fe231e2013-05-08 21:45:15 +02002193 return;
Luis R. Rodriguezb2e253c2010-11-17 21:46:09 -08002194 }
2195
2196 reg_request = list_first_entry(&reg_requests_list,
2197 struct regulatory_request,
2198 list);
2199 list_del_init(&reg_request->list);
2200
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002201 spin_unlock(&reg_requests_lock);
Luis R. Rodriguezb0e28802010-11-17 21:46:08 -08002202
Arik Nemtsovef51fb12015-01-07 16:47:20 +02002203 if (reg_only_self_managed_wiphys()) {
2204 reg_free_request(reg_request);
2205 return;
2206 }
2207
Luis R. Rodriguez1daa37c2013-11-05 09:18:02 -08002208 reg_process_hint(reg_request);
Ben2e54a682015-03-12 09:37:34 -04002209
2210 lr = get_last_request();
2211
2212 spin_lock(&reg_requests_lock);
2213 if (!list_empty(&reg_requests_list) && lr && lr->processed)
2214 schedule_work(&reg_work);
2215 spin_unlock(&reg_requests_lock);
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002216}
2217
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05002218/* Processes beacon hints -- this has nothing to do with country IEs */
2219static void reg_process_pending_beacon_hints(void)
2220{
Johannes Berg79c97e92009-07-07 03:56:12 +02002221 struct cfg80211_registered_device *rdev;
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05002222 struct reg_beacon *pending_beacon, *tmp;
2223
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05002224 /* This goes through the _pending_ beacon list */
2225 spin_lock_bh(&reg_pending_beacons_lock);
2226
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05002227 list_for_each_entry_safe(pending_beacon, tmp,
2228 &reg_pending_beacons, list) {
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05002229 list_del_init(&pending_beacon->list);
2230
2231 /* Applies the beacon hint to current wiphys */
Johannes Berg79c97e92009-07-07 03:56:12 +02002232 list_for_each_entry(rdev, &cfg80211_rdev_list, list)
2233 wiphy_update_new_beacon(&rdev->wiphy, pending_beacon);
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05002234
2235 /* Remembers the beacon hint for new wiphys or reg changes */
2236 list_add_tail(&pending_beacon->list, &reg_beacon_list);
2237 }
2238
2239 spin_unlock_bh(&reg_pending_beacons_lock);
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05002240}
2241
Jonathan Doronb0d7aa52014-12-15 19:26:00 +02002242static void reg_process_self_managed_hints(void)
2243{
2244 struct cfg80211_registered_device *rdev;
2245 struct wiphy *wiphy;
2246 const struct ieee80211_regdomain *tmp;
2247 const struct ieee80211_regdomain *regd;
2248 enum ieee80211_band band;
2249 struct regulatory_request request = {};
2250
2251 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
2252 wiphy = &rdev->wiphy;
2253
2254 spin_lock(&reg_requests_lock);
2255 regd = rdev->requested_regd;
2256 rdev->requested_regd = NULL;
2257 spin_unlock(&reg_requests_lock);
2258
2259 if (regd == NULL)
2260 continue;
2261
2262 tmp = get_wiphy_regdom(wiphy);
2263 rcu_assign_pointer(wiphy->regd, regd);
2264 rcu_free_regdom(tmp);
2265
2266 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
2267 handle_band_custom(wiphy, wiphy->bands[band], regd);
2268
2269 reg_process_ht_flags(wiphy);
2270
2271 request.wiphy_idx = get_wiphy_idx(wiphy);
2272 request.alpha2[0] = regd->alpha2[0];
2273 request.alpha2[1] = regd->alpha2[1];
2274 request.initiator = NL80211_REGDOM_SET_BY_DRIVER;
2275
2276 nl80211_send_wiphy_reg_change_event(&request);
2277 }
2278
2279 reg_check_channels();
2280}
2281
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002282static void reg_todo(struct work_struct *work)
2283{
Johannes Berg5fe231e2013-05-08 21:45:15 +02002284 rtnl_lock();
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002285 reg_process_pending_hints();
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05002286 reg_process_pending_beacon_hints();
Jonathan Doronb0d7aa52014-12-15 19:26:00 +02002287 reg_process_self_managed_hints();
Johannes Berg5fe231e2013-05-08 21:45:15 +02002288 rtnl_unlock();
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002289}
2290
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002291static void queue_regulatory_request(struct regulatory_request *request)
2292{
Johannes Bergd4f2c882012-12-03 18:59:58 +01002293 request->alpha2[0] = toupper(request->alpha2[0]);
2294 request->alpha2[1] = toupper(request->alpha2[1]);
John W. Linvillec61029c2010-08-05 14:26:24 -04002295
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002296 spin_lock(&reg_requests_lock);
2297 list_add_tail(&request->list, &reg_requests_list);
2298 spin_unlock(&reg_requests_lock);
2299
2300 schedule_work(&reg_work);
2301}
2302
Luis R. Rodriguez09d989d2010-01-29 19:58:57 -05002303/*
2304 * Core regulatory hint -- happens during cfg80211_init()
2305 * and when we restore regulatory settings.
2306 */
Luis R. Rodriguezba25c142009-02-21 00:04:23 -05002307static int regulatory_hint_core(const char *alpha2)
2308{
2309 struct regulatory_request *request;
2310
Johannes Berg1a919312012-12-03 17:21:11 +01002311 request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL);
Luis R. Rodriguezba25c142009-02-21 00:04:23 -05002312 if (!request)
2313 return -ENOMEM;
2314
2315 request->alpha2[0] = alpha2[0];
2316 request->alpha2[1] = alpha2[1];
Luis R. Rodriguez7db90f42009-03-09 22:07:41 -04002317 request->initiator = NL80211_REGDOM_SET_BY_CORE;
Luis R. Rodriguezba25c142009-02-21 00:04:23 -05002318
Luis R. Rodriguez31e99722010-11-17 21:46:06 -08002319 queue_regulatory_request(request);
Luis R. Rodriguez5078b2e2009-05-13 17:04:42 -04002320
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002321 return 0;
Luis R. Rodriguezba25c142009-02-21 00:04:23 -05002322}
2323
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002324/* User hints */
Luis R. Rodriguez57b5ce02012-07-12 11:49:18 -07002325int regulatory_hint_user(const char *alpha2,
2326 enum nl80211_user_reg_hint_type user_reg_hint_type)
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002327{
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002328 struct regulatory_request *request;
2329
Johannes Bergfdc9d7b2012-12-03 18:36:09 +01002330 if (WARN_ON(!alpha2))
2331 return -EINVAL;
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002332
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002333 request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL);
2334 if (!request)
2335 return -ENOMEM;
2336
Johannes Bergf4173762012-12-03 18:23:37 +01002337 request->wiphy_idx = WIPHY_IDX_INVALID;
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002338 request->alpha2[0] = alpha2[0];
2339 request->alpha2[1] = alpha2[1];
Luis R. Rodrigueze12822e2010-01-04 11:37:39 -05002340 request->initiator = NL80211_REGDOM_SET_BY_USER;
Luis R. Rodriguez57b5ce02012-07-12 11:49:18 -07002341 request->user_reg_hint_type = user_reg_hint_type;
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002342
Ilan peerc37722b2015-03-30 15:15:49 +03002343 /* Allow calling CRDA again */
2344 reg_crda_timeouts = 0;
2345
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002346 queue_regulatory_request(request);
2347
2348 return 0;
2349}
2350
Ilan peer05050752015-03-04 00:32:06 -05002351int regulatory_hint_indoor(bool is_indoor, u32 portid)
Ilan Peer52616f22014-02-25 16:26:00 +02002352{
Ilan peer05050752015-03-04 00:32:06 -05002353 spin_lock(&reg_indoor_lock);
Ilan Peer52616f22014-02-25 16:26:00 +02002354
Ilan peer05050752015-03-04 00:32:06 -05002355 /* It is possible that more than one user space process is trying to
2356 * configure the indoor setting. To handle such cases, clear the indoor
2357 * setting in case that some process does not think that the device
2358 * is operating in an indoor environment. In addition, if a user space
2359 * process indicates that it is controlling the indoor setting, save its
2360 * portid, i.e., make it the owner.
2361 */
2362 reg_is_indoor = is_indoor;
2363 if (reg_is_indoor) {
2364 if (!reg_is_indoor_portid)
2365 reg_is_indoor_portid = portid;
2366 } else {
2367 reg_is_indoor_portid = 0;
2368 }
Ilan Peer52616f22014-02-25 16:26:00 +02002369
Ilan peer05050752015-03-04 00:32:06 -05002370 spin_unlock(&reg_indoor_lock);
2371
2372 if (!is_indoor)
2373 reg_check_channels();
Ilan Peer52616f22014-02-25 16:26:00 +02002374
2375 return 0;
2376}
2377
Ilan peer05050752015-03-04 00:32:06 -05002378void regulatory_netlink_notify(u32 portid)
2379{
2380 spin_lock(&reg_indoor_lock);
2381
2382 if (reg_is_indoor_portid != portid) {
2383 spin_unlock(&reg_indoor_lock);
2384 return;
2385 }
2386
2387 reg_is_indoor = false;
2388 reg_is_indoor_portid = 0;
2389
2390 spin_unlock(&reg_indoor_lock);
2391
2392 reg_check_channels();
2393}
2394
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002395/* Driver hints */
2396int regulatory_hint(struct wiphy *wiphy, const char *alpha2)
2397{
2398 struct regulatory_request *request;
2399
Johannes Bergfdc9d7b2012-12-03 18:36:09 +01002400 if (WARN_ON(!alpha2 || !wiphy))
2401 return -EINVAL;
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002402
Luis R. Rodriguez4f7b9142013-12-14 20:09:06 +01002403 wiphy->regulatory_flags &= ~REGULATORY_CUSTOM_REG;
2404
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002405 request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL);
2406 if (!request)
2407 return -ENOMEM;
2408
2409 request->wiphy_idx = get_wiphy_idx(wiphy);
2410
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002411 request->alpha2[0] = alpha2[0];
2412 request->alpha2[1] = alpha2[1];
Luis R. Rodriguez7db90f42009-03-09 22:07:41 -04002413 request->initiator = NL80211_REGDOM_SET_BY_DRIVER;
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002414
Ilan peerc37722b2015-03-30 15:15:49 +03002415 /* Allow calling CRDA again */
2416 reg_crda_timeouts = 0;
2417
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002418 queue_regulatory_request(request);
2419
2420 return 0;
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002421}
2422EXPORT_SYMBOL(regulatory_hint);
2423
Luis R. Rodriguez789fd032013-10-04 18:07:24 -07002424void regulatory_hint_country_ie(struct wiphy *wiphy, enum ieee80211_band band,
2425 const u8 *country_ie, u8 country_ie_len)
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -08002426{
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -08002427 char alpha2[2];
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -08002428 enum environment_cap env = ENVIRON_ANY;
Johannes Bergdb2424c2013-05-10 19:07:52 +02002429 struct regulatory_request *request = NULL, *lr;
Luis R. Rodriguezd335fe62009-02-21 00:04:27 -05002430
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -08002431 /* IE len must be evenly divisible by 2 */
2432 if (country_ie_len & 0x01)
Johannes Bergdb2424c2013-05-10 19:07:52 +02002433 return;
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -08002434
2435 if (country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
Johannes Bergdb2424c2013-05-10 19:07:52 +02002436 return;
2437
2438 request = kzalloc(sizeof(*request), GFP_KERNEL);
2439 if (!request)
2440 return;
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -08002441
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -08002442 alpha2[0] = country_ie[0];
2443 alpha2[1] = country_ie[1];
2444
2445 if (country_ie[2] == 'I')
2446 env = ENVIRON_INDOOR;
2447 else if (country_ie[2] == 'O')
2448 env = ENVIRON_OUTDOOR;
2449
Johannes Bergdb2424c2013-05-10 19:07:52 +02002450 rcu_read_lock();
2451 lr = get_last_request();
2452
2453 if (unlikely(!lr))
2454 goto out;
2455
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -05002456 /*
Luis R. Rodriguez8b19e6c2009-07-30 17:38:09 -07002457 * We will run this only upon a successful connection on cfg80211.
Luis R. Rodriguez4b44c8b2009-07-30 17:38:07 -07002458 * We leave conflict resolution to the workqueue, where can hold
Johannes Berg5fe231e2013-05-08 21:45:15 +02002459 * the RTNL.
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -05002460 */
Johannes Bergc492db32012-12-06 16:29:25 +01002461 if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE &&
2462 lr->wiphy_idx != WIPHY_IDX_INVALID)
Luis R. Rodriguez4b44c8b2009-07-30 17:38:07 -07002463 goto out;
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -08002464
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002465 request->wiphy_idx = get_wiphy_idx(wiphy);
John W. Linville4f366c52010-07-15 14:57:33 -04002466 request->alpha2[0] = alpha2[0];
2467 request->alpha2[1] = alpha2[1];
Luis R. Rodriguez7db90f42009-03-09 22:07:41 -04002468 request->initiator = NL80211_REGDOM_SET_BY_COUNTRY_IE;
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002469 request->country_ie_env = env;
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -08002470
Ilan peerc37722b2015-03-30 15:15:49 +03002471 /* Allow calling CRDA again */
2472 reg_crda_timeouts = 0;
2473
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05002474 queue_regulatory_request(request);
Johannes Bergdb2424c2013-05-10 19:07:52 +02002475 request = NULL;
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -08002476out:
Johannes Bergdb2424c2013-05-10 19:07:52 +02002477 kfree(request);
2478 rcu_read_unlock();
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -08002479}
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002480
Luis R. Rodriguez09d989d2010-01-29 19:58:57 -05002481static void restore_alpha2(char *alpha2, bool reset_user)
2482{
2483 /* indicates there is no alpha2 to consider for restoration */
2484 alpha2[0] = '9';
2485 alpha2[1] = '7';
2486
2487 /* The user setting has precedence over the module parameter */
2488 if (is_user_regdom_saved()) {
2489 /* Unless we're asked to ignore it and reset it */
2490 if (reset_user) {
Johannes Berg1a919312012-12-03 17:21:11 +01002491 REG_DBG_PRINT("Restoring regulatory settings including user preference\n");
Luis R. Rodriguez09d989d2010-01-29 19:58:57 -05002492 user_alpha2[0] = '9';
2493 user_alpha2[1] = '7';
2494
2495 /*
2496 * If we're ignoring user settings, we still need to
2497 * check the module parameter to ensure we put things
2498 * back as they were for a full restore.
2499 */
2500 if (!is_world_regdom(ieee80211_regdom)) {
Johannes Berg1a919312012-12-03 17:21:11 +01002501 REG_DBG_PRINT("Keeping preference on module parameter ieee80211_regdom: %c%c\n",
2502 ieee80211_regdom[0], ieee80211_regdom[1]);
Luis R. Rodriguez09d989d2010-01-29 19:58:57 -05002503 alpha2[0] = ieee80211_regdom[0];
2504 alpha2[1] = ieee80211_regdom[1];
2505 }
2506 } else {
Johannes Berg1a919312012-12-03 17:21:11 +01002507 REG_DBG_PRINT("Restoring regulatory settings while preserving user preference for: %c%c\n",
2508 user_alpha2[0], user_alpha2[1]);
Luis R. Rodriguez09d989d2010-01-29 19:58:57 -05002509 alpha2[0] = user_alpha2[0];
2510 alpha2[1] = user_alpha2[1];
2511 }
2512 } else if (!is_world_regdom(ieee80211_regdom)) {
Johannes Berg1a919312012-12-03 17:21:11 +01002513 REG_DBG_PRINT("Keeping preference on module parameter ieee80211_regdom: %c%c\n",
2514 ieee80211_regdom[0], ieee80211_regdom[1]);
Luis R. Rodriguez09d989d2010-01-29 19:58:57 -05002515 alpha2[0] = ieee80211_regdom[0];
2516 alpha2[1] = ieee80211_regdom[1];
2517 } else
Luis R. Rodriguezd91e41b2010-10-20 10:18:59 -07002518 REG_DBG_PRINT("Restoring regulatory settings\n");
Luis R. Rodriguez09d989d2010-01-29 19:58:57 -05002519}
2520
Rajkumar Manoharan5ce543d2011-12-07 21:50:08 +05302521static void restore_custom_reg_settings(struct wiphy *wiphy)
2522{
2523 struct ieee80211_supported_band *sband;
2524 enum ieee80211_band band;
2525 struct ieee80211_channel *chan;
2526 int i;
2527
2528 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
2529 sband = wiphy->bands[band];
2530 if (!sband)
2531 continue;
2532 for (i = 0; i < sband->n_channels; i++) {
2533 chan = &sband->channels[i];
2534 chan->flags = chan->orig_flags;
2535 chan->max_antenna_gain = chan->orig_mag;
2536 chan->max_power = chan->orig_mpwr;
Paul Stewart899852a2012-08-01 16:54:42 -07002537 chan->beacon_found = false;
Rajkumar Manoharan5ce543d2011-12-07 21:50:08 +05302538 }
2539 }
2540}
2541
Luis R. Rodriguez09d989d2010-01-29 19:58:57 -05002542/*
2543 * Restoring regulatory settings involves ingoring any
2544 * possibly stale country IE information and user regulatory
2545 * settings if so desired, this includes any beacon hints
2546 * learned as we could have traveled outside to another country
2547 * after disconnection. To restore regulatory settings we do
2548 * exactly what we did at bootup:
2549 *
2550 * - send a core regulatory hint
2551 * - send a user regulatory hint if applicable
2552 *
2553 * Device drivers that send a regulatory hint for a specific country
2554 * keep their own regulatory domain on wiphy->regd so that does does
2555 * not need to be remembered.
2556 */
2557static void restore_regulatory_settings(bool reset_user)
2558{
2559 char alpha2[2];
Dmitry Shmidtcee0bec2011-12-19 12:32:21 -08002560 char world_alpha2[2];
Luis R. Rodriguez09d989d2010-01-29 19:58:57 -05002561 struct reg_beacon *reg_beacon, *btmp;
Luis R. Rodriguez14609552011-04-05 10:49:03 -07002562 LIST_HEAD(tmp_reg_req_list);
Rajkumar Manoharan5ce543d2011-12-07 21:50:08 +05302563 struct cfg80211_registered_device *rdev;
Luis R. Rodriguez09d989d2010-01-29 19:58:57 -05002564
Johannes Berg5fe231e2013-05-08 21:45:15 +02002565 ASSERT_RTNL();
2566
Ilan peer05050752015-03-04 00:32:06 -05002567 /*
2568 * Clear the indoor setting in case that it is not controlled by user
2569 * space, as otherwise there is no guarantee that the device is still
2570 * operating in an indoor environment.
2571 */
2572 spin_lock(&reg_indoor_lock);
2573 if (reg_is_indoor && !reg_is_indoor_portid) {
2574 reg_is_indoor = false;
2575 reg_check_channels();
2576 }
2577 spin_unlock(&reg_indoor_lock);
Ilan Peer52616f22014-02-25 16:26:00 +02002578
Johannes Berg2d319862013-01-09 12:01:38 +01002579 reset_regdomains(true, &world_regdom);
Luis R. Rodriguez09d989d2010-01-29 19:58:57 -05002580 restore_alpha2(alpha2, reset_user);
2581
Luis R. Rodriguez14609552011-04-05 10:49:03 -07002582 /*
2583 * If there's any pending requests we simply
2584 * stash them to a temporary pending queue and
2585 * add then after we've restored regulatory
2586 * settings.
2587 */
2588 spin_lock(&reg_requests_lock);
Ilan peereeca9fc2015-03-04 00:32:07 -05002589 list_splice_tail_init(&reg_requests_list, &tmp_reg_req_list);
Luis R. Rodriguez14609552011-04-05 10:49:03 -07002590 spin_unlock(&reg_requests_lock);
2591
Luis R. Rodriguez09d989d2010-01-29 19:58:57 -05002592 /* Clear beacon hints */
2593 spin_lock_bh(&reg_pending_beacons_lock);
Johannes Bergfea9bce2012-12-03 17:32:01 +01002594 list_for_each_entry_safe(reg_beacon, btmp, &reg_pending_beacons, list) {
2595 list_del(&reg_beacon->list);
2596 kfree(reg_beacon);
Luis R. Rodriguez09d989d2010-01-29 19:58:57 -05002597 }
2598 spin_unlock_bh(&reg_pending_beacons_lock);
2599
Johannes Bergfea9bce2012-12-03 17:32:01 +01002600 list_for_each_entry_safe(reg_beacon, btmp, &reg_beacon_list, list) {
2601 list_del(&reg_beacon->list);
2602 kfree(reg_beacon);
Luis R. Rodriguez09d989d2010-01-29 19:58:57 -05002603 }
2604
2605 /* First restore to the basic regulatory settings */
Johannes Berg379b82f2012-12-06 15:44:07 +01002606 world_alpha2[0] = cfg80211_world_regdom->alpha2[0];
2607 world_alpha2[1] = cfg80211_world_regdom->alpha2[1];
Luis R. Rodriguez09d989d2010-01-29 19:58:57 -05002608
Rajkumar Manoharan5ce543d2011-12-07 21:50:08 +05302609 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
Jonathan Doronb0d7aa52014-12-15 19:26:00 +02002610 if (rdev->wiphy.regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED)
2611 continue;
Luis R. Rodrigueza2f73b62013-11-11 22:15:29 +01002612 if (rdev->wiphy.regulatory_flags & REGULATORY_CUSTOM_REG)
Rajkumar Manoharan5ce543d2011-12-07 21:50:08 +05302613 restore_custom_reg_settings(&rdev->wiphy);
2614 }
2615
Dmitry Shmidtcee0bec2011-12-19 12:32:21 -08002616 regulatory_hint_core(world_alpha2);
Luis R. Rodriguez09d989d2010-01-29 19:58:57 -05002617
2618 /*
2619 * This restores the ieee80211_regdom module parameter
2620 * preference or the last user requested regulatory
2621 * settings, user regulatory settings takes precedence.
2622 */
2623 if (is_an_alpha2(alpha2))
Maciej S. Szmigiero549cc1c2015-09-02 19:00:31 +02002624 regulatory_hint_user(alpha2, NL80211_USER_REG_HINT_USER);
Luis R. Rodriguez09d989d2010-01-29 19:58:57 -05002625
Luis R. Rodriguez14609552011-04-05 10:49:03 -07002626 spin_lock(&reg_requests_lock);
Johannes Berg11cff962012-12-03 18:56:41 +01002627 list_splice_tail_init(&tmp_reg_req_list, &reg_requests_list);
Luis R. Rodriguez14609552011-04-05 10:49:03 -07002628 spin_unlock(&reg_requests_lock);
2629
Luis R. Rodriguez14609552011-04-05 10:49:03 -07002630 REG_DBG_PRINT("Kicking the queue\n");
2631
2632 schedule_work(&reg_work);
2633}
Luis R. Rodriguez09d989d2010-01-29 19:58:57 -05002634
2635void regulatory_hint_disconnect(void)
2636{
Johannes Berg1a919312012-12-03 17:21:11 +01002637 REG_DBG_PRINT("All devices are disconnected, going to restore regulatory settings\n");
Luis R. Rodriguez09d989d2010-01-29 19:58:57 -05002638 restore_regulatory_settings(false);
2639}
2640
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05002641static bool freq_is_chan_12_13_14(u16 freq)
2642{
Bruno Randolf59eb21a2011-01-17 13:37:28 +09002643 if (freq == ieee80211_channel_to_frequency(12, IEEE80211_BAND_2GHZ) ||
2644 freq == ieee80211_channel_to_frequency(13, IEEE80211_BAND_2GHZ) ||
2645 freq == ieee80211_channel_to_frequency(14, IEEE80211_BAND_2GHZ))
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05002646 return true;
2647 return false;
2648}
2649
Luis R. Rodriguez3ebfa6e2012-12-19 10:53:02 -08002650static bool pending_reg_beacon(struct ieee80211_channel *beacon_chan)
2651{
2652 struct reg_beacon *pending_beacon;
2653
2654 list_for_each_entry(pending_beacon, &reg_pending_beacons, list)
2655 if (beacon_chan->center_freq ==
2656 pending_beacon->chan.center_freq)
2657 return true;
2658 return false;
2659}
2660
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05002661int regulatory_hint_found_beacon(struct wiphy *wiphy,
2662 struct ieee80211_channel *beacon_chan,
2663 gfp_t gfp)
2664{
2665 struct reg_beacon *reg_beacon;
Luis R. Rodriguez3ebfa6e2012-12-19 10:53:02 -08002666 bool processing;
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05002667
Johannes Berg1a919312012-12-03 17:21:11 +01002668 if (beacon_chan->beacon_found ||
2669 beacon_chan->flags & IEEE80211_CHAN_RADAR ||
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05002670 (beacon_chan->band == IEEE80211_BAND_2GHZ &&
Johannes Berg1a919312012-12-03 17:21:11 +01002671 !freq_is_chan_12_13_14(beacon_chan->center_freq)))
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05002672 return 0;
2673
Luis R. Rodriguez3ebfa6e2012-12-19 10:53:02 -08002674 spin_lock_bh(&reg_pending_beacons_lock);
2675 processing = pending_reg_beacon(beacon_chan);
2676 spin_unlock_bh(&reg_pending_beacons_lock);
2677
2678 if (processing)
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05002679 return 0;
2680
2681 reg_beacon = kzalloc(sizeof(struct reg_beacon), gfp);
2682 if (!reg_beacon)
2683 return -ENOMEM;
2684
Johannes Berg1a919312012-12-03 17:21:11 +01002685 REG_DBG_PRINT("Found new beacon on frequency: %d MHz (Ch %d) on %s\n",
Luis R. Rodriguez4113f752010-01-04 11:50:11 -05002686 beacon_chan->center_freq,
2687 ieee80211_frequency_to_channel(beacon_chan->center_freq),
2688 wiphy_name(wiphy));
2689
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05002690 memcpy(&reg_beacon->chan, beacon_chan,
Johannes Berg1a919312012-12-03 17:21:11 +01002691 sizeof(struct ieee80211_channel));
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05002692
2693 /*
2694 * Since we can be called from BH or and non-BH context
2695 * we must use spin_lock_bh()
2696 */
2697 spin_lock_bh(&reg_pending_beacons_lock);
2698 list_add_tail(&reg_beacon->list, &reg_pending_beacons);
2699 spin_unlock_bh(&reg_pending_beacons_lock);
2700
2701 schedule_work(&reg_work);
2702
2703 return 0;
2704}
2705
Johannes Berga3d2eaf2008-09-15 11:10:52 +02002706static void print_rd_rules(const struct ieee80211_regdomain *rd)
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002707{
2708 unsigned int i;
Johannes Berga3d2eaf2008-09-15 11:10:52 +02002709 const struct ieee80211_reg_rule *reg_rule = NULL;
2710 const struct ieee80211_freq_range *freq_range = NULL;
2711 const struct ieee80211_power_rule *power_rule = NULL;
Janusz Dziedzic089027e2014-02-21 19:46:12 +01002712 char bw[32], cac_time[32];
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002713
Janusz Dziedzic089027e2014-02-21 19:46:12 +01002714 pr_info(" (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp), (dfs_cac_time)\n");
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002715
2716 for (i = 0; i < rd->n_reg_rules; i++) {
2717 reg_rule = &rd->reg_rules[i];
2718 freq_range = &reg_rule->freq_range;
2719 power_rule = &reg_rule->power_rule;
2720
Janusz Dziedzicb0dfd2e2014-02-20 13:52:16 +01002721 if (reg_rule->flags & NL80211_RRF_AUTO_BW)
2722 snprintf(bw, sizeof(bw), "%d KHz, %d KHz AUTO",
2723 freq_range->max_bandwidth_khz,
Janusz Dziedzic97524822014-01-30 09:52:20 +01002724 reg_get_max_bandwidth(rd, reg_rule));
2725 else
Janusz Dziedzicb0dfd2e2014-02-20 13:52:16 +01002726 snprintf(bw, sizeof(bw), "%d KHz",
Janusz Dziedzic97524822014-01-30 09:52:20 +01002727 freq_range->max_bandwidth_khz);
2728
Janusz Dziedzic089027e2014-02-21 19:46:12 +01002729 if (reg_rule->flags & NL80211_RRF_DFS)
2730 scnprintf(cac_time, sizeof(cac_time), "%u s",
2731 reg_rule->dfs_cac_ms/1000);
2732 else
2733 scnprintf(cac_time, sizeof(cac_time), "N/A");
2734
2735
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -05002736 /*
2737 * There may not be documentation for max antenna gain
2738 * in certain regions
2739 */
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002740 if (power_rule->max_antenna_gain)
Janusz Dziedzic089027e2014-02-21 19:46:12 +01002741 pr_info(" (%d KHz - %d KHz @ %s), (%d mBi, %d mBm), (%s)\n",
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002742 freq_range->start_freq_khz,
2743 freq_range->end_freq_khz,
Janusz Dziedzic97524822014-01-30 09:52:20 +01002744 bw,
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002745 power_rule->max_antenna_gain,
Janusz Dziedzic089027e2014-02-21 19:46:12 +01002746 power_rule->max_eirp,
2747 cac_time);
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002748 else
Janusz Dziedzic089027e2014-02-21 19:46:12 +01002749 pr_info(" (%d KHz - %d KHz @ %s), (N/A, %d mBm), (%s)\n",
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002750 freq_range->start_freq_khz,
2751 freq_range->end_freq_khz,
Janusz Dziedzic97524822014-01-30 09:52:20 +01002752 bw,
Janusz Dziedzic089027e2014-02-21 19:46:12 +01002753 power_rule->max_eirp,
2754 cac_time);
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002755 }
2756}
2757
Luis R. Rodriguez4c7d3982013-11-13 18:54:02 +01002758bool reg_supported_dfs_region(enum nl80211_dfs_regions dfs_region)
Luis R. Rodriguez8b60b072011-10-11 10:59:02 -07002759{
2760 switch (dfs_region) {
2761 case NL80211_DFS_UNSET:
2762 case NL80211_DFS_FCC:
2763 case NL80211_DFS_ETSI:
2764 case NL80211_DFS_JP:
2765 return true;
2766 default:
2767 REG_DBG_PRINT("Ignoring uknown DFS master region: %d\n",
2768 dfs_region);
2769 return false;
2770 }
2771}
2772
Johannes Berga3d2eaf2008-09-15 11:10:52 +02002773static void print_regdomain(const struct ieee80211_regdomain *rd)
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002774{
Johannes Bergc492db32012-12-06 16:29:25 +01002775 struct regulatory_request *lr = get_last_request();
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002776
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -08002777 if (is_intersected_alpha2(rd->alpha2)) {
Johannes Bergc492db32012-12-06 16:29:25 +01002778 if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) {
Johannes Berg79c97e92009-07-07 03:56:12 +02002779 struct cfg80211_registered_device *rdev;
Johannes Bergc492db32012-12-06 16:29:25 +01002780 rdev = cfg80211_rdev_by_wiphy_idx(lr->wiphy_idx);
Johannes Berg79c97e92009-07-07 03:56:12 +02002781 if (rdev) {
Joe Perchese9c02682010-11-16 19:56:49 -08002782 pr_info("Current regulatory domain updated by AP to: %c%c\n",
Johannes Berg79c97e92009-07-07 03:56:12 +02002783 rdev->country_ie_alpha2[0],
2784 rdev->country_ie_alpha2[1]);
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -08002785 } else
Joe Perchese9c02682010-11-16 19:56:49 -08002786 pr_info("Current regulatory domain intersected:\n");
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -08002787 } else
Joe Perchese9c02682010-11-16 19:56:49 -08002788 pr_info("Current regulatory domain intersected:\n");
Johannes Berg1a919312012-12-03 17:21:11 +01002789 } else if (is_world_regdom(rd->alpha2)) {
Joe Perchese9c02682010-11-16 19:56:49 -08002790 pr_info("World regulatory domain updated:\n");
Johannes Berg1a919312012-12-03 17:21:11 +01002791 } else {
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002792 if (is_unknown_alpha2(rd->alpha2))
Joe Perchese9c02682010-11-16 19:56:49 -08002793 pr_info("Regulatory domain changed to driver built-in settings (unknown country)\n");
Luis R. Rodriguez57b5ce02012-07-12 11:49:18 -07002794 else {
Johannes Bergc492db32012-12-06 16:29:25 +01002795 if (reg_request_cell_base(lr))
Johannes Berg1a919312012-12-03 17:21:11 +01002796 pr_info("Regulatory domain changed to country: %c%c by Cell Station\n",
Luis R. Rodriguez57b5ce02012-07-12 11:49:18 -07002797 rd->alpha2[0], rd->alpha2[1]);
2798 else
Johannes Berg1a919312012-12-03 17:21:11 +01002799 pr_info("Regulatory domain changed to country: %c%c\n",
Luis R. Rodriguez57b5ce02012-07-12 11:49:18 -07002800 rd->alpha2[0], rd->alpha2[1]);
2801 }
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002802 }
Johannes Berg1a919312012-12-03 17:21:11 +01002803
Luis R. Rodriguez3ef121b2013-11-13 18:54:05 +01002804 pr_info(" DFS Master region: %s", reg_dfs_region_str(rd->dfs_region));
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002805 print_rd_rules(rd);
2806}
2807
Johannes Berg2df78162008-10-28 16:49:41 +01002808static void print_regdomain_info(const struct ieee80211_regdomain *rd)
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002809{
Joe Perchese9c02682010-11-16 19:56:49 -08002810 pr_info("Regulatory domain: %c%c\n", rd->alpha2[0], rd->alpha2[1]);
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002811 print_rd_rules(rd);
2812}
2813
Luis R. Rodriguez3b9e5ac2013-11-05 09:18:14 -08002814static int reg_set_rd_core(const struct ieee80211_regdomain *rd)
2815{
2816 if (!is_world_regdom(rd->alpha2))
2817 return -EINVAL;
2818 update_world_regdomain(rd);
2819 return 0;
2820}
2821
Luis R. Rodriguez84721d42013-11-05 09:18:15 -08002822static int reg_set_rd_user(const struct ieee80211_regdomain *rd,
2823 struct regulatory_request *user_request)
2824{
2825 const struct ieee80211_regdomain *intersected_rd = NULL;
2826
Luis R. Rodriguez84721d42013-11-05 09:18:15 -08002827 if (!regdom_changes(rd->alpha2))
2828 return -EALREADY;
2829
2830 if (!is_valid_rd(rd)) {
2831 pr_err("Invalid regulatory domain detected:\n");
2832 print_regdomain_info(rd);
2833 return -EINVAL;
2834 }
2835
2836 if (!user_request->intersect) {
2837 reset_regdomains(false, rd);
2838 return 0;
2839 }
2840
2841 intersected_rd = regdom_intersect(rd, get_cfg80211_regdom());
2842 if (!intersected_rd)
2843 return -EINVAL;
2844
2845 kfree(rd);
2846 rd = NULL;
2847 reset_regdomains(false, intersected_rd);
2848
2849 return 0;
2850}
2851
Luis R. Rodriguezf5fe3242013-11-05 09:18:16 -08002852static int reg_set_rd_driver(const struct ieee80211_regdomain *rd,
2853 struct regulatory_request *driver_request)
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002854{
Johannes Berge9763c32012-12-03 16:59:46 +01002855 const struct ieee80211_regdomain *regd;
Luis R. Rodriguez9c964772008-10-30 13:33:53 -07002856 const struct ieee80211_regdomain *intersected_rd = NULL;
Luis R. Rodriguezf5fe3242013-11-05 09:18:16 -08002857 const struct ieee80211_regdomain *tmp;
Luis R. Rodriguez806a9e32009-02-21 00:04:26 -05002858 struct wiphy *request_wiphy;
Johannes Berg6913b492012-12-04 00:48:59 +01002859
Luis R. Rodriguezf5fe3242013-11-05 09:18:16 -08002860 if (is_world_regdom(rd->alpha2))
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002861 return -EINVAL;
2862
Luis R. Rodriguezf5fe3242013-11-05 09:18:16 -08002863 if (!regdom_changes(rd->alpha2))
2864 return -EALREADY;
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002865
Luis R. Rodriguez8375af32008-11-12 14:21:57 -08002866 if (!is_valid_rd(rd)) {
Joe Perchese9c02682010-11-16 19:56:49 -08002867 pr_err("Invalid regulatory domain detected:\n");
Luis R. Rodriguez8375af32008-11-12 14:21:57 -08002868 print_regdomain_info(rd);
2869 return -EINVAL;
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002870 }
2871
Luis R. Rodriguezf5fe3242013-11-05 09:18:16 -08002872 request_wiphy = wiphy_idx_to_wiphy(driver_request->wiphy_idx);
2873 if (!request_wiphy) {
Shaibal Dutta845f3352014-01-30 15:08:30 -08002874 queue_delayed_work(system_power_efficient_wq,
2875 &reg_timeout, 0);
Johannes Bergde3584b2011-11-21 10:44:00 +01002876 return -ENODEV;
2877 }
Luis R. Rodriguez806a9e32009-02-21 00:04:26 -05002878
Luis R. Rodriguezf5fe3242013-11-05 09:18:16 -08002879 if (!driver_request->intersect) {
Luis R. Rodriguez558f6d32009-06-08 18:54:37 -07002880 if (request_wiphy->regd)
2881 return -EALREADY;
Luis R. Rodriguez3e0c3ff2009-01-07 17:43:34 -08002882
Johannes Berge9763c32012-12-03 16:59:46 +01002883 regd = reg_copy_regd(rd);
2884 if (IS_ERR(regd))
2885 return PTR_ERR(regd);
Luis R. Rodriguez3e0c3ff2009-01-07 17:43:34 -08002886
Johannes Berg458f4f92012-12-06 15:47:38 +01002887 rcu_assign_pointer(request_wiphy->regd, regd);
Johannes Berg379b82f2012-12-06 15:44:07 +01002888 reset_regdomains(false, rd);
Luis R. Rodriguezb8295ac2008-11-12 14:21:58 -08002889 return 0;
2890 }
2891
Luis R. Rodriguezf5fe3242013-11-05 09:18:16 -08002892 intersected_rd = regdom_intersect(rd, get_cfg80211_regdom());
2893 if (!intersected_rd)
2894 return -EINVAL;
Luis R. Rodriguezb8295ac2008-11-12 14:21:58 -08002895
Luis R. Rodriguezf5fe3242013-11-05 09:18:16 -08002896 /*
2897 * We can trash what CRDA provided now.
2898 * However if a driver requested this specific regulatory
2899 * domain we keep it for its private use
2900 */
2901 tmp = get_wiphy_regdom(request_wiphy);
2902 rcu_assign_pointer(request_wiphy->regd, rd);
2903 rcu_free_regdom(tmp);
Luis R. Rodriguezb8295ac2008-11-12 14:21:58 -08002904
Luis R. Rodriguezf5fe3242013-11-05 09:18:16 -08002905 rd = NULL;
Larry Fingerb7566fc2013-02-04 15:33:44 -06002906
Luis R. Rodriguezf5fe3242013-11-05 09:18:16 -08002907 reset_regdomains(false, intersected_rd);
Luis R. Rodriguez3e0c3ff2009-01-07 17:43:34 -08002908
Luis R. Rodriguezf5fe3242013-11-05 09:18:16 -08002909 return 0;
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002910}
2911
Luis R. Rodriguez01992402013-11-05 09:18:17 -08002912static int reg_set_rd_country_ie(const struct ieee80211_regdomain *rd,
2913 struct regulatory_request *country_ie_request)
Luis R. Rodriguezf5fe3242013-11-05 09:18:16 -08002914{
2915 struct wiphy *request_wiphy;
2916
2917 if (!is_alpha2_set(rd->alpha2) && !is_an_alpha2(rd->alpha2) &&
2918 !is_unknown_alpha2(rd->alpha2))
2919 return -EINVAL;
2920
2921 /*
2922 * Lets only bother proceeding on the same alpha2 if the current
2923 * rd is non static (it means CRDA was present and was used last)
2924 * and the pending request came in from a country IE
2925 */
2926
2927 if (!is_valid_rd(rd)) {
2928 pr_err("Invalid regulatory domain detected:\n");
2929 print_regdomain_info(rd);
2930 return -EINVAL;
2931 }
2932
Luis R. Rodriguez01992402013-11-05 09:18:17 -08002933 request_wiphy = wiphy_idx_to_wiphy(country_ie_request->wiphy_idx);
Luis R. Rodriguezf5fe3242013-11-05 09:18:16 -08002934 if (!request_wiphy) {
Shaibal Dutta845f3352014-01-30 15:08:30 -08002935 queue_delayed_work(system_power_efficient_wq,
2936 &reg_timeout, 0);
Luis R. Rodriguezf5fe3242013-11-05 09:18:16 -08002937 return -ENODEV;
2938 }
2939
Luis R. Rodriguez01992402013-11-05 09:18:17 -08002940 if (country_ie_request->intersect)
Luis R. Rodriguezf5fe3242013-11-05 09:18:16 -08002941 return -EINVAL;
2942
2943 reset_regdomains(false, rd);
2944 return 0;
2945}
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002946
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -05002947/*
2948 * Use this call to set the current regulatory domain. Conflicts with
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002949 * multiple drivers can be ironed out later. Caller must've already
Johannes Berg458f4f92012-12-06 15:47:38 +01002950 * kmalloc'd the rd structure.
Luis R. Rodriguezfb1fc7a2009-02-21 00:04:31 -05002951 */
Ilan peerc37722b2015-03-30 15:15:49 +03002952int set_regdom(const struct ieee80211_regdomain *rd,
2953 enum ieee80211_regd_source regd_src)
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002954{
Johannes Bergc492db32012-12-06 16:29:25 +01002955 struct regulatory_request *lr;
Janusz Dziedzic092008a2014-02-14 08:54:00 +01002956 bool user_reset = false;
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002957 int r;
2958
Luis R. Rodriguez3b9e5ac2013-11-05 09:18:14 -08002959 if (!reg_is_valid_request(rd->alpha2)) {
2960 kfree(rd);
2961 return -EINVAL;
2962 }
2963
Ilan peerc37722b2015-03-30 15:15:49 +03002964 if (regd_src == REGD_SOURCE_CRDA)
2965 reg_crda_timeouts = 0;
2966
Johannes Bergc492db32012-12-06 16:29:25 +01002967 lr = get_last_request();
Luis R. Rodriguezabc73812009-07-30 17:38:08 -07002968
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07002969 /* Note that this doesn't update the wiphys, this is done below */
Luis R. Rodriguez3b9e5ac2013-11-05 09:18:14 -08002970 switch (lr->initiator) {
2971 case NL80211_REGDOM_SET_BY_CORE:
2972 r = reg_set_rd_core(rd);
2973 break;
2974 case NL80211_REGDOM_SET_BY_USER:
Luis R. Rodriguez84721d42013-11-05 09:18:15 -08002975 r = reg_set_rd_user(rd, lr);
Janusz Dziedzic092008a2014-02-14 08:54:00 +01002976 user_reset = true;
Luis R. Rodriguez84721d42013-11-05 09:18:15 -08002977 break;
Luis R. Rodriguez3b9e5ac2013-11-05 09:18:14 -08002978 case NL80211_REGDOM_SET_BY_DRIVER:
Luis R. Rodriguezf5fe3242013-11-05 09:18:16 -08002979 r = reg_set_rd_driver(rd, lr);
2980 break;
Luis R. Rodriguez3b9e5ac2013-11-05 09:18:14 -08002981 case NL80211_REGDOM_SET_BY_COUNTRY_IE:
Luis R. Rodriguez01992402013-11-05 09:18:17 -08002982 r = reg_set_rd_country_ie(rd, lr);
Luis R. Rodriguez3b9e5ac2013-11-05 09:18:14 -08002983 break;
2984 default:
2985 WARN(1, "invalid initiator %d\n", lr->initiator);
2986 return -EINVAL;
2987 }
2988
Johannes Bergd2372b32008-10-24 20:32:20 +02002989 if (r) {
Janusz Dziedzic092008a2014-02-14 08:54:00 +01002990 switch (r) {
2991 case -EALREADY:
Kalle Valo95908532012-07-12 15:33:58 +03002992 reg_set_request_processed();
Janusz Dziedzic092008a2014-02-14 08:54:00 +01002993 break;
2994 default:
2995 /* Back to world regulatory in case of errors */
2996 restore_regulatory_settings(user_reset);
2997 }
Kalle Valo95908532012-07-12 15:33:58 +03002998
Johannes Bergd2372b32008-10-24 20:32:20 +02002999 kfree(rd);
Johannes Berg38fd2142013-05-10 19:17:17 +02003000 return r;
Johannes Bergd2372b32008-10-24 20:32:20 +02003001 }
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07003002
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07003003 /* This would make this whole thing pointless */
Johannes Berg38fd2142013-05-10 19:17:17 +02003004 if (WARN_ON(!lr->intersect && rd != get_cfg80211_regdom()))
3005 return -EINVAL;
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07003006
3007 /* update all wiphys now with the new established regulatory domain */
Johannes Bergc492db32012-12-06 16:29:25 +01003008 update_all_wiphy_regulatory(lr->initiator);
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07003009
Johannes Berg458f4f92012-12-06 15:47:38 +01003010 print_regdomain(get_cfg80211_regdom());
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07003011
Johannes Bergc492db32012-12-06 16:29:25 +01003012 nl80211_send_reg_change_event(lr);
Luis R. Rodriguez73d54c92009-03-09 22:07:42 -04003013
Luis R. Rodriguezb2e253c2010-11-17 21:46:09 -08003014 reg_set_request_processed();
3015
Johannes Berg38fd2142013-05-10 19:17:17 +02003016 return 0;
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07003017}
3018
Arik Nemtsov2c3e8612015-01-07 16:47:19 +02003019static int __regulatory_set_wiphy_regd(struct wiphy *wiphy,
3020 struct ieee80211_regdomain *rd)
Jonathan Doronb0d7aa52014-12-15 19:26:00 +02003021{
3022 const struct ieee80211_regdomain *regd;
3023 const struct ieee80211_regdomain *prev_regd;
3024 struct cfg80211_registered_device *rdev;
3025
3026 if (WARN_ON(!wiphy || !rd))
3027 return -EINVAL;
3028
3029 if (WARN(!(wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED),
3030 "wiphy should have REGULATORY_WIPHY_SELF_MANAGED\n"))
3031 return -EPERM;
3032
3033 if (WARN(!is_valid_rd(rd), "Invalid regulatory domain detected\n")) {
3034 print_regdomain_info(rd);
3035 return -EINVAL;
3036 }
3037
3038 regd = reg_copy_regd(rd);
3039 if (IS_ERR(regd))
3040 return PTR_ERR(regd);
3041
3042 rdev = wiphy_to_rdev(wiphy);
3043
3044 spin_lock(&reg_requests_lock);
3045 prev_regd = rdev->requested_regd;
3046 rdev->requested_regd = regd;
3047 spin_unlock(&reg_requests_lock);
3048
3049 kfree(prev_regd);
Arik Nemtsov2c3e8612015-01-07 16:47:19 +02003050 return 0;
3051}
3052
3053int regulatory_set_wiphy_regd(struct wiphy *wiphy,
3054 struct ieee80211_regdomain *rd)
3055{
3056 int ret = __regulatory_set_wiphy_regd(wiphy, rd);
3057
3058 if (ret)
3059 return ret;
Jonathan Doronb0d7aa52014-12-15 19:26:00 +02003060
3061 schedule_work(&reg_work);
3062 return 0;
3063}
3064EXPORT_SYMBOL(regulatory_set_wiphy_regd);
3065
Arik Nemtsov2c3e8612015-01-07 16:47:19 +02003066int regulatory_set_wiphy_regd_sync_rtnl(struct wiphy *wiphy,
3067 struct ieee80211_regdomain *rd)
3068{
3069 int ret;
3070
3071 ASSERT_RTNL();
3072
3073 ret = __regulatory_set_wiphy_regd(wiphy, rd);
3074 if (ret)
3075 return ret;
3076
3077 /* process the request immediately */
3078 reg_process_self_managed_hints();
3079 return 0;
3080}
3081EXPORT_SYMBOL(regulatory_set_wiphy_regd_sync_rtnl);
3082
Luis R. Rodriguez57b5ce02012-07-12 11:49:18 -07003083void wiphy_regulatory_register(struct wiphy *wiphy)
3084{
Arik Nemtsov23df0b72013-07-21 16:36:48 +03003085 struct regulatory_request *lr;
3086
Jonathan Doronb0d7aa52014-12-15 19:26:00 +02003087 /* self-managed devices ignore external hints */
3088 if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED)
3089 wiphy->regulatory_flags |= REGULATORY_DISABLE_BEACON_HINTS |
3090 REGULATORY_COUNTRY_IE_IGNORE;
3091
Luis R. Rodriguez57b5ce02012-07-12 11:49:18 -07003092 if (!reg_dev_ignore_cell_hint(wiphy))
3093 reg_num_devs_support_basehint++;
3094
Arik Nemtsov23df0b72013-07-21 16:36:48 +03003095 lr = get_last_request();
3096 wiphy_update_regulatory(wiphy, lr->initiator);
Luis R. Rodriguez57b5ce02012-07-12 11:49:18 -07003097}
3098
Luis R. Rodriguezbfead082012-07-12 11:49:19 -07003099void wiphy_regulatory_deregister(struct wiphy *wiphy)
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -08003100{
Luis R. Rodriguez0ad8aca2009-03-24 21:21:08 -04003101 struct wiphy *request_wiphy = NULL;
Johannes Bergc492db32012-12-06 16:29:25 +01003102 struct regulatory_request *lr;
Luis R. Rodriguez761cf7e2009-02-21 00:04:25 -05003103
Johannes Bergc492db32012-12-06 16:29:25 +01003104 lr = get_last_request();
Luis R. Rodriguezabc73812009-07-30 17:38:08 -07003105
Luis R. Rodriguez57b5ce02012-07-12 11:49:18 -07003106 if (!reg_dev_ignore_cell_hint(wiphy))
3107 reg_num_devs_support_basehint--;
3108
Johannes Berg458f4f92012-12-06 15:47:38 +01003109 rcu_free_regdom(get_wiphy_regdom(wiphy));
Monam Agarwal34dd8862014-03-24 00:53:40 +05303110 RCU_INIT_POINTER(wiphy->regd, NULL);
Chris Wright0ef9ccd2009-04-24 14:09:31 -07003111
Johannes Bergc492db32012-12-06 16:29:25 +01003112 if (lr)
3113 request_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx);
Luis R. Rodriguez806a9e32009-02-21 00:04:26 -05003114
Chris Wright0ef9ccd2009-04-24 14:09:31 -07003115 if (!request_wiphy || request_wiphy != wiphy)
Johannes Berg38fd2142013-05-10 19:17:17 +02003116 return;
Chris Wright0ef9ccd2009-04-24 14:09:31 -07003117
Johannes Bergc492db32012-12-06 16:29:25 +01003118 lr->wiphy_idx = WIPHY_IDX_INVALID;
3119 lr->country_ie_env = ENVIRON_ANY;
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -08003120}
3121
Luis R. Rodrigueza90c7a32011-04-05 10:49:04 -07003122static void reg_timeout_work(struct work_struct *work)
3123{
Johannes Berg1a919312012-12-03 17:21:11 +01003124 REG_DBG_PRINT("Timeout while waiting for CRDA to reply, restoring regulatory settings\n");
Johannes Bergf77b86d2013-06-24 15:43:38 +02003125 rtnl_lock();
Ilan peerc37722b2015-03-30 15:15:49 +03003126 reg_crda_timeouts++;
Luis R. Rodrigueza90c7a32011-04-05 10:49:04 -07003127 restore_regulatory_settings(true);
Johannes Bergf77b86d2013-06-24 15:43:38 +02003128 rtnl_unlock();
Luis R. Rodrigueza90c7a32011-04-05 10:49:04 -07003129}
3130
Ilan Peer174e0cd2014-02-23 09:13:01 +02003131/*
3132 * See http://www.fcc.gov/document/5-ghz-unlicensed-spectrum-unii, for
3133 * UNII band definitions
3134 */
3135int cfg80211_get_unii(int freq)
3136{
3137 /* UNII-1 */
3138 if (freq >= 5150 && freq <= 5250)
3139 return 0;
3140
3141 /* UNII-2A */
3142 if (freq > 5250 && freq <= 5350)
3143 return 1;
3144
3145 /* UNII-2B */
3146 if (freq > 5350 && freq <= 5470)
3147 return 2;
3148
3149 /* UNII-2C */
3150 if (freq > 5470 && freq <= 5725)
3151 return 3;
3152
3153 /* UNII-3 */
3154 if (freq > 5725 && freq <= 5825)
3155 return 4;
3156
3157 return -EINVAL;
3158}
3159
Ilan Peerc8866e52014-02-23 09:13:03 +02003160bool regulatory_indoor_allowed(void)
3161{
3162 return reg_is_indoor;
3163}
3164
Uwe Kleine-König2fcc9f72010-06-18 09:38:55 +02003165int __init regulatory_init(void)
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07003166{
Luis R. Rodriguezbcf4f992009-02-21 00:04:24 -05003167 int err = 0;
Johannes Berg734366d2008-09-15 10:56:48 +02003168
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07003169 reg_pdev = platform_device_register_simple("regulatory", 0, NULL, 0);
3170 if (IS_ERR(reg_pdev))
3171 return PTR_ERR(reg_pdev);
Johannes Berg734366d2008-09-15 10:56:48 +02003172
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05003173 spin_lock_init(&reg_requests_lock);
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05003174 spin_lock_init(&reg_pending_beacons_lock);
Ilan peer05050752015-03-04 00:32:06 -05003175 spin_lock_init(&reg_indoor_lock);
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05003176
Luis R. Rodriguez80007ef2012-03-23 07:23:31 -07003177 reg_regdb_size_check();
3178
Johannes Berg458f4f92012-12-06 15:47:38 +01003179 rcu_assign_pointer(cfg80211_regdomain, cfg80211_world_regdom);
Johannes Berg734366d2008-09-15 10:56:48 +02003180
Luis R. Rodriguez09d989d2010-01-29 19:58:57 -05003181 user_alpha2[0] = '9';
3182 user_alpha2[1] = '7';
3183
Luis R. Rodriguezae9e4b02009-07-14 20:23:15 -04003184 /* We always try to get an update for the static regdomain */
Johannes Berg458f4f92012-12-06 15:47:38 +01003185 err = regulatory_hint_core(cfg80211_world_regdom->alpha2);
Luis R. Rodriguezbcf4f992009-02-21 00:04:24 -05003186 if (err) {
3187 if (err == -ENOMEM)
3188 return err;
3189 /*
3190 * N.B. kobject_uevent_env() can fail mainly for when we're out
3191 * memory which is handled and propagated appropriately above
3192 * but it can also fail during a netlink_broadcast() or during
3193 * early boot for call_usermodehelper(). For now treat these
3194 * errors as non-fatal.
3195 */
Joe Perchese9c02682010-11-16 19:56:49 -08003196 pr_err("kobject_uevent_env() was unable to call CRDA during init\n");
Luis R. Rodriguezbcf4f992009-02-21 00:04:24 -05003197 }
Johannes Berg734366d2008-09-15 10:56:48 +02003198
Luis R. Rodriguezae9e4b02009-07-14 20:23:15 -04003199 /*
3200 * Finally, if the user set the module parameter treat it
3201 * as a user hint.
3202 */
3203 if (!is_world_regdom(ieee80211_regdom))
Luis R. Rodriguez57b5ce02012-07-12 11:49:18 -07003204 regulatory_hint_user(ieee80211_regdom,
3205 NL80211_USER_REG_HINT_USER);
Luis R. Rodriguezae9e4b02009-07-14 20:23:15 -04003206
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07003207 return 0;
3208}
3209
Johannes Berg1a919312012-12-03 17:21:11 +01003210void regulatory_exit(void)
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07003211{
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05003212 struct regulatory_request *reg_request, *tmp;
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05003213 struct reg_beacon *reg_beacon, *btmp;
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05003214
3215 cancel_work_sync(&reg_work);
Luis R. Rodrigueza90c7a32011-04-05 10:49:04 -07003216 cancel_delayed_work_sync(&reg_timeout);
Arik Nemtsovad932f02014-11-27 09:44:55 +02003217 cancel_delayed_work_sync(&reg_check_chans);
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05003218
Johannes Berg9027b142012-12-03 17:59:24 +01003219 /* Lock to suppress warnings */
Johannes Berg38fd2142013-05-10 19:17:17 +02003220 rtnl_lock();
Johannes Berg379b82f2012-12-06 15:44:07 +01003221 reset_regdomains(true, NULL);
Johannes Berg38fd2142013-05-10 19:17:17 +02003222 rtnl_unlock();
Johannes Berg734366d2008-09-15 10:56:48 +02003223
Luis R. Rodriguez58ebacc2011-11-08 14:28:06 -08003224 dev_set_uevent_suppress(&reg_pdev->dev, true);
Johannes Bergf6037d02008-10-21 11:01:33 +02003225
Luis R. Rodriguezb2e1b302008-09-09 23:19:48 -07003226 platform_device_unregister(reg_pdev);
Johannes Berg734366d2008-09-15 10:56:48 +02003227
Johannes Bergfea9bce2012-12-03 17:32:01 +01003228 list_for_each_entry_safe(reg_beacon, btmp, &reg_pending_beacons, list) {
3229 list_del(&reg_beacon->list);
3230 kfree(reg_beacon);
Luis R. Rodrigueze38f8a72009-02-21 00:20:39 -05003231 }
3232
Johannes Bergfea9bce2012-12-03 17:32:01 +01003233 list_for_each_entry_safe(reg_beacon, btmp, &reg_beacon_list, list) {
3234 list_del(&reg_beacon->list);
3235 kfree(reg_beacon);
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05003236 }
Luis R. Rodriguezfe33eb32009-02-21 00:04:30 -05003237
Johannes Bergfea9bce2012-12-03 17:32:01 +01003238 list_for_each_entry_safe(reg_request, tmp, &reg_requests_list, list) {
3239 list_del(&reg_request->list);
3240 kfree(reg_request);
Johannes Berg8318d782008-01-24 19:38:38 +01003241 }
Johannes Berg8318d782008-01-24 19:38:38 +01003242}