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Merge tag 'for-6.2-rc2-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave...
[linux-block.git] / net / wireless / reg.c
CommitLineData
8318d78a
JB		 1/*
2 * Copyright 2002-2005, Instant802 Networks, Inc.
3 * Copyright 2005-2006, Devicescape Software, Inc.
4 * Copyright 2007 Johannes Berg <johannes@sipsolutions.net>
3b77d5ec 5 * Copyright 2008-2011 Luis R. Rodriguez <mcgrof@qca.qualcomm.com>
2740f0cf 6 * Copyright 2013-2014 Intel Mobile Communications GmbH
4e0854a7 7 * Copyright 2017 Intel Deutschland GmbH
7b0a0e3c 8 * Copyright (C) 2018 - 2022 Intel Corporation
8318d78a 9 *
3b77d5ec
LR		 10 * Permission to use, copy, modify, and/or distribute this software for any
11 * purpose with or without fee is hereby granted, provided that the above
12 * copyright notice and this permission notice appear in all copies.
13 *
14 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
15 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
16 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
17 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
18 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
19 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
20 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
8318d78a
JB		 21 */
22
3b77d5ec 23
b2e1b302
LR		 24/**
25 * DOC: Wireless regulatory infrastructure
8318d78a
JB		 26 *
27 * The usual implementation is for a driver to read a device EEPROM to
28 * determine which regulatory domain it should be operating under, then
29 * looking up the allowable channels in a driver-local table and finally
30 * registering those channels in the wiphy structure.
31 *
b2e1b302
LR		 32 * Another set of compliance enforcement is for drivers to use their
33 * own compliance limits which can be stored on the EEPROM. The host
34 * driver or firmware may ensure these are used.
35 *
36 * In addition to all this we provide an extra layer of regulatory
37 * conformance. For drivers which do not have any regulatory
38 * information CRDA provides the complete regulatory solution.
39 * For others it provides a community effort on further restrictions
40 * to enhance compliance.
41 *
42 * Note: When number of rules --> infinity we will not be able to
43 * index on alpha2 any more, instead we'll probably have to
44 * rely on some SHA1 checksum of the regdomain for example.
45 *
8318d78a 46 */
e9c0268f
JP		 47
48#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
49
8318d78a 50#include <linux/kernel.h>
bc3b2d7f 51#include <linux/export.h>
5a0e3ad6 52#include <linux/slab.h>
b2e1b302 53#include <linux/list.h>
c61029c7 54#include <linux/ctype.h>
b2e1b302
LR		 55#include <linux/nl80211.h>
56#include <linux/platform_device.h>
90a53e44 57#include <linux/verification.h>
d9b93842 58#include <linux/moduleparam.h>
007f6c5e 59#include <linux/firmware.h>
b2e1b302 60#include <net/cfg80211.h>
8318d78a 61#include "core.h"
b2e1b302 62#include "reg.h"
ad932f04 63#include "rdev-ops.h"
73d54c9e 64#include "nl80211.h"
8318d78a 65
ad932f04
AN		 66/*
67 * Grace period we give before making sure all current interfaces reside on
68 * channels allowed by the current regulatory domain.
69 */
70#define REG_ENFORCE_GRACE_MS 60000
71
52616f2b
IP		 72/**
73 * enum reg_request_treatment - regulatory request treatment
74 *
75 * @REG_REQ_OK: continue processing the regulatory request
76 * @REG_REQ_IGNORE: ignore the regulatory request
77 * @REG_REQ_INTERSECT: the regulatory domain resulting from this request should
78 * be intersected with the current one.
79 * @REG_REQ_ALREADY_SET: the regulatory request will not change the current
80 * regulatory settings, and no further processing is required.
52616f2b 81 */
2f92212b
JB		 82enum reg_request_treatment {
83 REG_REQ_OK,
84 REG_REQ_IGNORE,
85 REG_REQ_INTERSECT,
86 REG_REQ_ALREADY_SET,
87};
88
a042994d
LR		 89static struct regulatory_request core_request_world = {
90 .initiator = NL80211_REGDOM_SET_BY_CORE,
91 .alpha2[0] = '0',
92 .alpha2[1] = '0',
93 .intersect = false,
94 .processed = true,
95 .country_ie_env = ENVIRON_ANY,
96};
97
38fd2143
JB		 98/*
99 * Receipt of information from last regulatory request,
100 * protected by RTNL (and can be accessed with RCU protection)
101 */
c492db37 102static struct regulatory_request __rcu *last_request =
cec3f0ed 103 (void __force __rcu *)&core_request_world;
734366de 104
007f6c5e 105/* To trigger userspace events and load firmware */
b2e1b302 106static struct platform_device *reg_pdev;
8318d78a 107
fb1fc7ad
LR		 108/*
109 * Central wireless core regulatory domains, we only need two,
734366de 110 * the current one and a world regulatory domain in case we have no
e8da2bb4 111 * information to give us an alpha2.
38fd2143 112 * (protected by RTNL, can be read under RCU)
fb1fc7ad 113 */
458f4f9e 114const struct ieee80211_regdomain __rcu *cfg80211_regdomain;
734366de 115
57b5ce07
LR		 116/*
117 * Number of devices that registered to the core
118 * that support cellular base station regulatory hints
38fd2143 119 * (protected by RTNL)
57b5ce07
LR		 120 */
121static int reg_num_devs_support_basehint;
122
52616f2b
IP		 123/*
124 * State variable indicating if the platform on which the devices
125 * are attached is operating in an indoor environment. The state variable
126 * is relevant for all registered devices.
52616f2b
IP		 127 */
128static bool reg_is_indoor;
81d94f47 129static DEFINE_SPINLOCK(reg_indoor_lock);
05050753
I		 130
131/* Used to track the userspace process controlling the indoor setting */
132static u32 reg_is_indoor_portid;
52616f2b 133
e646a025
JB		 134static void restore_regulatory_settings(bool reset_user, bool cached);
135static void print_regdomain(const struct ieee80211_regdomain *rd);
1eda9191 136static void reg_process_hint(struct regulatory_request *reg_request);
c37722bd 137
458f4f9e
JB		 138static const struct ieee80211_regdomain *get_cfg80211_regdom(void)
139{
5bf16a11 140 return rcu_dereference_rtnl(cfg80211_regdomain);
458f4f9e
JB		 141}
142
51d62f2f
IP		 143/*
144 * Returns the regulatory domain associated with the wiphy.
145 *
a05829a7 146 * Requires any of RTNL, wiphy mutex or RCU protection.
51d62f2f 147 */
ad30ca2c 148const struct ieee80211_regdomain *get_wiphy_regdom(struct wiphy *wiphy)
458f4f9e 149{
a05829a7
JB		 150 return rcu_dereference_check(wiphy->regd,
151 lockdep_is_held(&wiphy->mtx) ||
152 lockdep_rtnl_is_held());
458f4f9e 153}
a05829a7 154EXPORT_SYMBOL(get_wiphy_regdom);
458f4f9e 155
3ef121b5
LR		 156static const char *reg_dfs_region_str(enum nl80211_dfs_regions dfs_region)
157{
158 switch (dfs_region) {
159 case NL80211_DFS_UNSET:
160 return "unset";
161 case NL80211_DFS_FCC:
162 return "FCC";
163 case NL80211_DFS_ETSI:
164 return "ETSI";
165 case NL80211_DFS_JP:
166 return "JP";
167 }
168 return "Unknown";
169}
170
6c474799
LR		 171enum nl80211_dfs_regions reg_get_dfs_region(struct wiphy *wiphy)
172{
173 const struct ieee80211_regdomain *regd = NULL;
174 const struct ieee80211_regdomain *wiphy_regd = NULL;
90bd5bee 175 enum nl80211_dfs_regions dfs_region;
6c474799 176
a05829a7 177 rcu_read_lock();
6c474799 178 regd = get_cfg80211_regdom();
90bd5bee 179 dfs_region = regd->dfs_region;
a05829a7 180
6c474799
LR		 181 if (!wiphy)
182 goto out;
183
184 wiphy_regd = get_wiphy_regdom(wiphy);
185 if (!wiphy_regd)
186 goto out;
187
90bd5bee
S		 188 if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) {
189 dfs_region = wiphy_regd->dfs_region;
190 goto out;
191 }
192
6c474799
LR		 193 if (wiphy_regd->dfs_region == regd->dfs_region)
194 goto out;
195
c799ba6e
JB		 196 pr_debug("%s: device specific dfs_region (%s) disagrees with cfg80211's central dfs_region (%s)\n",
197 dev_name(&wiphy->dev),
198 reg_dfs_region_str(wiphy_regd->dfs_region),
199 reg_dfs_region_str(regd->dfs_region));
6c474799
LR		 200
201out:
a05829a7
JB		 202 rcu_read_unlock();
203
90bd5bee 204 return dfs_region;
6c474799
LR		 205}
206
458f4f9e
JB		 207static void rcu_free_regdom(const struct ieee80211_regdomain *r)
208{
209 if (!r)
210 return;
211 kfree_rcu((struct ieee80211_regdomain *)r, rcu_head);
212}
213
c492db37
JB		 214static struct regulatory_request *get_last_request(void)
215{
38fd2143 216 return rcu_dereference_rtnl(last_request);
c492db37
JB		 217}
218
e38f8a7a 219/* Used to queue up regulatory hints */
fe33eb39 220static LIST_HEAD(reg_requests_list);
81d94f47 221static DEFINE_SPINLOCK(reg_requests_lock);
fe33eb39 222
e38f8a7a
LR		 223/* Used to queue up beacon hints for review */
224static LIST_HEAD(reg_pending_beacons);
81d94f47 225static DEFINE_SPINLOCK(reg_pending_beacons_lock);
e38f8a7a
LR		 226
227/* Used to keep track of processed beacon hints */
228static LIST_HEAD(reg_beacon_list);
229
230struct reg_beacon {
231 struct list_head list;
232 struct ieee80211_channel chan;
233};
234
ad932f04
AN		 235static void reg_check_chans_work(struct work_struct *work);
236static DECLARE_DELAYED_WORK(reg_check_chans, reg_check_chans_work);
237
f333a7a2
LR		 238static void reg_todo(struct work_struct *work);
239static DECLARE_WORK(reg_work, reg_todo);
240
734366de
JB		 241/* We keep a static world regulatory domain in case of the absence of CRDA */
242static const struct ieee80211_regdomain world_regdom = {
28981e5e 243 .n_reg_rules = 8,
734366de
JB		 244 .alpha2 = "00",
245 .reg_rules = {
68798a62
LR		 246 /* IEEE 802.11b/g, channels 1..11 */
247 REG_RULE(2412-10, 2462+10, 40, 6, 20, 0),
43c771a1 248 /* IEEE 802.11b/g, channels 12..13. */
c3826807
JB		 249 REG_RULE(2467-10, 2472+10, 20, 6, 20,
250 NL80211_RRF_NO_IR | NL80211_RRF_AUTO_BW),
611b6a82
LR		 251 /* IEEE 802.11 channel 14 - Only JP enables
252 * this and for 802.11b only */
253 REG_RULE(2484-10, 2484+10, 20, 6, 20,
8fe02e16 254 NL80211_RRF_NO_IR |
611b6a82
LR		 255 NL80211_RRF_NO_OFDM),
256 /* IEEE 802.11a, channel 36..48 */
c3826807
JB		 257 REG_RULE(5180-10, 5240+10, 80, 6, 20,
258 NL80211_RRF_NO_IR |
259 NL80211_RRF_AUTO_BW),
3fc71f77 260
131a19bc 261 /* IEEE 802.11a, channel 52..64 - DFS required */
c3826807 262 REG_RULE(5260-10, 5320+10, 80, 6, 20,
8fe02e16 263 NL80211_RRF_NO_IR |
c3826807 264 NL80211_RRF_AUTO_BW |
131a19bc
JB		 265 NL80211_RRF_DFS),
266
267 /* IEEE 802.11a, channel 100..144 - DFS required */
268 REG_RULE(5500-10, 5720+10, 160, 6, 20,
8fe02e16 269 NL80211_RRF_NO_IR |
131a19bc 270 NL80211_RRF_DFS),
3fc71f77
LR		 271
272 /* IEEE 802.11a, channel 149..165 */
8ab9d85c 273 REG_RULE(5745-10, 5825+10, 80, 6, 20,
8fe02e16 274 NL80211_RRF_NO_IR),
90cdc6df 275
8047d261 276 /* IEEE 802.11ad (60GHz), channels 1..3 */
90cdc6df 277 REG_RULE(56160+2160*1-1080, 56160+2160*3+1080, 2160, 0, 0, 0),
734366de
JB		 278 }
279};
280
38fd2143 281/* protected by RTNL */
a3d2eaf0
JB		 282static const struct ieee80211_regdomain *cfg80211_world_regdom =
283 &world_regdom;
734366de 284
6ee7d330 285static char *ieee80211_regdom = "00";
09d989d1 286static char user_alpha2[2];
e646a025 287static const struct ieee80211_regdomain *cfg80211_user_regdom;
6ee7d330 288
734366de
JB		 289module_param(ieee80211_regdom, charp, 0444);
290MODULE_PARM_DESC(ieee80211_regdom, "IEEE 802.11 regulatory domain code");
291
c888393b 292static void reg_free_request(struct regulatory_request *request)
5ad6ef5e 293{
d34265a3
JB		 294 if (request == &core_request_world)
295 return;
296
c888393b
AN		 297 if (request != get_last_request())
298 kfree(request);
299}
300
301static void reg_free_last_request(void)
302{
303 struct regulatory_request *lr = get_last_request();
304
5ad6ef5e
LR		 305 if (lr != &core_request_world && lr)
306 kfree_rcu(lr, rcu_head);
307}
308
05f1a3ea
LR		 309static void reg_update_last_request(struct regulatory_request *request)
310{
255e25b0
LR		 311 struct regulatory_request *lr;
312
313 lr = get_last_request();
314 if (lr == request)
315 return;
316
c888393b 317 reg_free_last_request();
05f1a3ea
LR		 318 rcu_assign_pointer(last_request, request);
319}
320
379b82f4
JB		 321static void reset_regdomains(bool full_reset,
322 const struct ieee80211_regdomain *new_regdom)
734366de 323{
458f4f9e
JB		 324 const struct ieee80211_regdomain *r;
325
38fd2143 326 ASSERT_RTNL();
e8da2bb4 327
458f4f9e
JB		 328 r = get_cfg80211_regdom();
329
942b25cf 330 /* avoid freeing static information or freeing something twice */
458f4f9e
JB		 331 if (r == cfg80211_world_regdom)
332 r = NULL;
942b25cf
JB		 333 if (cfg80211_world_regdom == &world_regdom)
334 cfg80211_world_regdom = NULL;
458f4f9e
JB		 335 if (r == &world_regdom)
336 r = NULL;
942b25cf 337
458f4f9e
JB		 338 rcu_free_regdom(r);
339 rcu_free_regdom(cfg80211_world_regdom);
734366de 340
a3d2eaf0 341 cfg80211_world_regdom = &world_regdom;
458f4f9e 342 rcu_assign_pointer(cfg80211_regdomain, new_regdom);
a042994d
LR		 343
344 if (!full_reset)
345 return;
346
05f1a3ea 347 reg_update_last_request(&core_request_world);
734366de
JB		 348}
349
fb1fc7ad
LR		 350/*
351 * Dynamic world regulatory domain requested by the wireless
352 * core upon initialization
353 */
a3d2eaf0 354static void update_world_regdomain(const struct ieee80211_regdomain *rd)
734366de 355{
c492db37 356 struct regulatory_request *lr;
734366de 357
c492db37
JB		 358 lr = get_last_request();
359
360 WARN_ON(!lr);
734366de 361
379b82f4 362 reset_regdomains(false, rd);
734366de
JB		 363
364 cfg80211_world_regdom = rd;
734366de 365}
734366de 366
a3d2eaf0 367bool is_world_regdom(const char *alpha2)
b2e1b302
LR		 368{
369 if (!alpha2)
370 return false;
1a919318 371 return alpha2[0] == '0' && alpha2[1] == '0';
b2e1b302 372}
8318d78a 373
a3d2eaf0 374static bool is_alpha2_set(const char *alpha2)
b2e1b302
LR		 375{
376 if (!alpha2)
377 return false;
1a919318 378 return alpha2[0] && alpha2[1];
b2e1b302 379}
8318d78a 380
a3d2eaf0 381static bool is_unknown_alpha2(const char *alpha2)
b2e1b302
LR		 382{
383 if (!alpha2)
384 return false;
fb1fc7ad
LR		 385 /*
386 * Special case where regulatory domain was built by driver
387 * but a specific alpha2 cannot be determined
388 */
1a919318 389 return alpha2[0] == '9' && alpha2[1] == '9';
b2e1b302 390}
8318d78a 391
3f2355cb
LR		 392static bool is_intersected_alpha2(const char *alpha2)
393{
394 if (!alpha2)
395 return false;
fb1fc7ad
LR		 396 /*
397 * Special case where regulatory domain is the
3f2355cb 398 * result of an intersection between two regulatory domain
fb1fc7ad
LR		 399 * structures
400 */
1a919318 401 return alpha2[0] == '9' && alpha2[1] == '8';
3f2355cb
LR		 402}
403
a3d2eaf0 404static bool is_an_alpha2(const char *alpha2)
b2e1b302
LR		 405{
406 if (!alpha2)
407 return false;
1a919318 408 return isalpha(alpha2[0]) && isalpha(alpha2[1]);
b2e1b302 409}
8318d78a 410
a3d2eaf0 411static bool alpha2_equal(const char *alpha2_x, const char *alpha2_y)
b2e1b302
LR		 412{
413 if (!alpha2_x || !alpha2_y)
414 return false;
1a919318 415 return alpha2_x[0] == alpha2_y[0] && alpha2_x[1] == alpha2_y[1];
b2e1b302
LR		 416}
417
69b1572b 418static bool regdom_changes(const char *alpha2)
b2e1b302 419{
458f4f9e 420 const struct ieee80211_regdomain *r = get_cfg80211_regdom();
761cf7ec 421
458f4f9e 422 if (!r)
b2e1b302 423 return true;
458f4f9e 424 return !alpha2_equal(r->alpha2, alpha2);
b2e1b302
LR		 425}
426
09d989d1
LR		 427/*
428 * The NL80211_REGDOM_SET_BY_USER regdom alpha2 is cached, this lets
429 * you know if a valid regulatory hint with NL80211_REGDOM_SET_BY_USER
430 * has ever been issued.
431 */
432static bool is_user_regdom_saved(void)
433{
434 if (user_alpha2[0] == '9' && user_alpha2[1] == '7')
435 return false;
436
437 /* This would indicate a mistake on the design */
1a919318 438 if (WARN(!is_world_regdom(user_alpha2) && !is_an_alpha2(user_alpha2),
09d989d1 439 "Unexpected user alpha2: %c%c\n",
1a919318 440 user_alpha2[0], user_alpha2[1]))
09d989d1
LR		 441 return false;
442
443 return true;
444}
445
e9763c3c
JB		 446static const struct ieee80211_regdomain *
447reg_copy_regd(const struct ieee80211_regdomain *src_regd)
3b377ea9
JL		 448{
449 struct ieee80211_regdomain *regd;
3b377ea9
JL		 450 unsigned int i;
451
9f8c7136
GS		 452 regd = kzalloc(struct_size(regd, reg_rules, src_regd->n_reg_rules),
453 GFP_KERNEL);
3b377ea9 454 if (!regd)
e9763c3c 455 return ERR_PTR(-ENOMEM);
3b377ea9
JL		 456
457 memcpy(regd, src_regd, sizeof(struct ieee80211_regdomain));
458
38cb87ee 459 for (i = 0; i < src_regd->n_reg_rules; i++)
3b377ea9 460 memcpy(&regd->reg_rules[i], &src_regd->reg_rules[i],
e9763c3c 461 sizeof(struct ieee80211_reg_rule));
3b377ea9 462
e9763c3c 463 return regd;
3b377ea9
JL		 464}
465
e646a025
JB		 466static void cfg80211_save_user_regdom(const struct ieee80211_regdomain *rd)
467{
468 ASSERT_RTNL();
469
470 if (!IS_ERR(cfg80211_user_regdom))
471 kfree(cfg80211_user_regdom);
472 cfg80211_user_regdom = reg_copy_regd(rd);
473}
474
c7d319e5 475struct reg_regdb_apply_request {
3b377ea9 476 struct list_head list;
c7d319e5 477 const struct ieee80211_regdomain *regdom;
3b377ea9
JL		 478};
479
c7d319e5
JB		 480static LIST_HEAD(reg_regdb_apply_list);
481static DEFINE_MUTEX(reg_regdb_apply_mutex);
3b377ea9 482
c7d319e5 483static void reg_regdb_apply(struct work_struct *work)
3b377ea9 484{
c7d319e5 485 struct reg_regdb_apply_request *request;
a85d0d7f 486
5fe231e8 487 rtnl_lock();
3b377ea9 488
c7d319e5
JB		 489 mutex_lock(&reg_regdb_apply_mutex);
490 while (!list_empty(&reg_regdb_apply_list)) {
491 request = list_first_entry(&reg_regdb_apply_list,
492 struct reg_regdb_apply_request,
3b377ea9
JL		 493 list);
494 list_del(&request->list);
495
c7d319e5 496 set_regdom(request->regdom, REGD_SOURCE_INTERNAL_DB);
3b377ea9
JL		 497 kfree(request);
498 }
c7d319e5 499 mutex_unlock(&reg_regdb_apply_mutex);
a85d0d7f 500
5fe231e8 501 rtnl_unlock();
3b377ea9
JL		 502}
503
c7d319e5 504static DECLARE_WORK(reg_regdb_work, reg_regdb_apply);
3b377ea9 505
007f6c5e 506static int reg_schedule_apply(const struct ieee80211_regdomain *regdom)
3b377ea9 507{
c7d319e5 508 struct reg_regdb_apply_request *request;
3b377ea9 509
c7d319e5 510 request = kzalloc(sizeof(struct reg_regdb_apply_request), GFP_KERNEL);
007f6c5e
JB		 511 if (!request) {
512 kfree(regdom);
c7d319e5
JB		 513 return -ENOMEM;
514 }
3b377ea9 515
007f6c5e
JB		 516 request->regdom = regdom;
517
c7d319e5
JB		 518 mutex_lock(&reg_regdb_apply_mutex);
519 list_add_tail(&request->list, &reg_regdb_apply_list);
520 mutex_unlock(&reg_regdb_apply_mutex);
3b377ea9
JL		 521
522 schedule_work(&reg_regdb_work);
c7d319e5 523 return 0;
3b377ea9 524}
80007efe 525
b6863036
JB		 526#ifdef CONFIG_CFG80211_CRDA_SUPPORT
527/* Max number of consecutive attempts to communicate with CRDA */
528#define REG_MAX_CRDA_TIMEOUTS 10
529
530static u32 reg_crda_timeouts;
531
532static void crda_timeout_work(struct work_struct *work);
533static DECLARE_DELAYED_WORK(crda_timeout, crda_timeout_work);
534
535static void crda_timeout_work(struct work_struct *work)
536{
c799ba6e 537 pr_debug("Timeout while waiting for CRDA to reply, restoring regulatory settings\n");
b6863036
JB		 538 rtnl_lock();
539 reg_crda_timeouts++;
e646a025 540 restore_regulatory_settings(true, false);
b6863036
JB		 541 rtnl_unlock();
542}
543
544static void cancel_crda_timeout(void)
545{
546 cancel_delayed_work(&crda_timeout);
547}
548
549static void cancel_crda_timeout_sync(void)
550{
551 cancel_delayed_work_sync(&crda_timeout);
552}
553
554static void reset_crda_timeouts(void)
555{
556 reg_crda_timeouts = 0;
557}
558
fb1fc7ad
LR		 559/*
560 * This lets us keep regulatory code which is updated on a regulatory
1226d258 561 * basis in userspace.
fb1fc7ad 562 */
b2e1b302
LR		 563static int call_crda(const char *alpha2)
564{
1226d258
JB		 565 char country[12];
566 char *env[] = { country, NULL };
c7d319e5 567 int ret;
1226d258
JB		 568
569 snprintf(country, sizeof(country), "COUNTRY=%c%c",
570 alpha2[0], alpha2[1]);
571
c37722bd 572 if (reg_crda_timeouts > REG_MAX_CRDA_TIMEOUTS) {
042ab5fc 573 pr_debug("Exceeded CRDA call max attempts. Not calling CRDA\n");
c37722bd
I		 574 return -EINVAL;
575 }
576
b2e1b302 577 if (!is_world_regdom((char *) alpha2))
042ab5fc 578 pr_debug("Calling CRDA for country: %c%c\n",
c799ba6e 579 alpha2[0], alpha2[1]);
b2e1b302 580 else
042ab5fc 581 pr_debug("Calling CRDA to update world regulatory domain\n");
b2e1b302 582
c7d319e5
JB		 583 ret = kobject_uevent_env(&reg_pdev->dev.kobj, KOBJ_CHANGE, env);
584 if (ret)
585 return ret;
586
587 queue_delayed_work(system_power_efficient_wq,
b6863036 588 &crda_timeout, msecs_to_jiffies(3142));
c7d319e5 589 return 0;
b2e1b302 590}
b6863036
JB		 591#else
592static inline void cancel_crda_timeout(void) {}
593static inline void cancel_crda_timeout_sync(void) {}
594static inline void reset_crda_timeouts(void) {}
595static inline int call_crda(const char *alpha2)
596{
597 return -ENODATA;
598}
599#endif /* CONFIG_CFG80211_CRDA_SUPPORT */
b2e1b302 600
007f6c5e
JB		 601/* code to directly load a firmware database through request_firmware */
602static const struct fwdb_header *regdb;
603
604struct fwdb_country {
605 u8 alpha2[2];
606 __be16 coll_ptr;
607 /* this struct cannot be extended */
608} __packed __aligned(4);
609
610struct fwdb_collection {
611 u8 len;
612 u8 n_rules;
613 u8 dfs_region;
614 /* no optional data yet */
615 /* aligned to 2, then followed by __be16 array of rule pointers */
616} __packed __aligned(4);
617
618enum fwdb_flags {
619 FWDB_FLAG_NO_OFDM = BIT(0),
620 FWDB_FLAG_NO_OUTDOOR = BIT(1),
621 FWDB_FLAG_DFS = BIT(2),
622 FWDB_FLAG_NO_IR = BIT(3),
623 FWDB_FLAG_AUTO_BW = BIT(4),
624};
625
230ebaa1
HD		 626struct fwdb_wmm_ac {
627 u8 ecw;
628 u8 aifsn;
629 __be16 cot;
630} __packed;
631
632struct fwdb_wmm_rule {
633 struct fwdb_wmm_ac client[IEEE80211_NUM_ACS];
634 struct fwdb_wmm_ac ap[IEEE80211_NUM_ACS];
635} __packed;
636
007f6c5e
JB		 637struct fwdb_rule {
638 u8 len;
639 u8 flags;
640 __be16 max_eirp;
641 __be32 start, end, max_bw;
642 /* start of optional data */
643 __be16 cac_timeout;
230ebaa1 644 __be16 wmm_ptr;
007f6c5e
JB		 645} __packed __aligned(4);
646
647#define FWDB_MAGIC 0x52474442
648#define FWDB_VERSION 20
649
650struct fwdb_header {
651 __be32 magic;
652 __be32 version;
653 struct fwdb_country country[];
654} __packed __aligned(4);
655
230ebaa1
HD		 656static int ecw2cw(int ecw)
657{
658 return (1 << ecw) - 1;
659}
660
661static bool valid_wmm(struct fwdb_wmm_rule *rule)
662{
663 struct fwdb_wmm_ac *ac = (struct fwdb_wmm_ac *)rule;
664 int i;
665
666 for (i = 0; i < IEEE80211_NUM_ACS * 2; i++) {
667 u16 cw_min = ecw2cw((ac[i].ecw & 0xf0) >> 4);
668 u16 cw_max = ecw2cw(ac[i].ecw & 0x0f);
669 u8 aifsn = ac[i].aifsn;
670
671 if (cw_min >= cw_max)
672 return false;
673
674 if (aifsn < 1)
675 return false;
676 }
677
678 return true;
679}
680
007f6c5e
JB		 681static bool valid_rule(const u8 *data, unsigned int size, u16 rule_ptr)
682{
683 struct fwdb_rule *rule = (void *)(data + (rule_ptr << 2));
684
685 if ((u8 *)rule + sizeof(rule->len) > data + size)
686 return false;
687
688 /* mandatory fields */
689 if (rule->len < offsetofend(struct fwdb_rule, max_bw))
690 return false;
230ebaa1
HD		 691 if (rule->len >= offsetofend(struct fwdb_rule, wmm_ptr)) {
692 u32 wmm_ptr = be16_to_cpu(rule->wmm_ptr) << 2;
693 struct fwdb_wmm_rule *wmm;
694
695 if (wmm_ptr + sizeof(struct fwdb_wmm_rule) > size)
696 return false;
007f6c5e 697
230ebaa1
HD		 698 wmm = (void *)(data + wmm_ptr);
699
700 if (!valid_wmm(wmm))
701 return false;
702 }
007f6c5e
JB		 703 return true;
704}
705
706static bool valid_country(const u8 *data, unsigned int size,
707 const struct fwdb_country *country)
708{
709 unsigned int ptr = be16_to_cpu(country->coll_ptr) << 2;
710 struct fwdb_collection *coll = (void *)(data + ptr);
711 __be16 *rules_ptr;
712 unsigned int i;
713
714 /* make sure we can read len/n_rules */
715 if ((u8 *)coll + offsetofend(typeof(*coll), n_rules) > data + size)
716 return false;
717
718 /* make sure base struct and all rules fit */
719 if ((u8 *)coll + ALIGN(coll->len, 2) +
720 (coll->n_rules * 2) > data + size)
721 return false;
722
723 /* mandatory fields must exist */
724 if (coll->len < offsetofend(struct fwdb_collection, dfs_region))
725 return false;
726
727 rules_ptr = (void *)((u8 *)coll + ALIGN(coll->len, 2));
728
729 for (i = 0; i < coll->n_rules; i++) {
730 u16 rule_ptr = be16_to_cpu(rules_ptr[i]);
731
732 if (!valid_rule(data, size, rule_ptr))
733 return false;
734 }
735
736 return true;
737}
738
90a53e44
JB		 739#ifdef CONFIG_CFG80211_REQUIRE_SIGNED_REGDB
740static struct key *builtin_regdb_keys;
741
742static void __init load_keys_from_buffer(const u8 *p, unsigned int buflen)
743{
744 const u8 *end = p + buflen;
745 size_t plen;
746 key_ref_t key;
747
748 while (p < end) {
749 /* Each cert begins with an ASN.1 SEQUENCE tag and must be more
750 * than 256 bytes in size.
751 */
752 if (end - p < 4)
753 goto dodgy_cert;
754 if (p[0] != 0x30 &&
755 p[1] != 0x82)
756 goto dodgy_cert;
757 plen = (p[2] << 8) | p[3];
758 plen += 4;
759 if (plen > end - p)
760 goto dodgy_cert;
761
762 key = key_create_or_update(make_key_ref(builtin_regdb_keys, 1),
763 "asymmetric", NULL, p, plen,
028db3e2
LT		 764 ((KEY_POS_ALL & ~KEY_POS_SETATTR) |
765 KEY_USR_VIEW | KEY_USR_READ),
90a53e44
JB		 766 KEY_ALLOC_NOT_IN_QUOTA |
767 KEY_ALLOC_BUILT_IN |
768 KEY_ALLOC_BYPASS_RESTRICTION);
769 if (IS_ERR(key)) {
770 pr_err("Problem loading in-kernel X.509 certificate (%ld)\n",
771 PTR_ERR(key));
772 } else {
773 pr_notice("Loaded X.509 cert '%s'\n",
774 key_ref_to_ptr(key)->description);
775 key_ref_put(key);
776 }
777 p += plen;
778 }
779
780 return;
781
782dodgy_cert:
783 pr_err("Problem parsing in-kernel X.509 certificate list\n");
784}
785
786static int __init load_builtin_regdb_keys(void)
787{
788 builtin_regdb_keys =
789 keyring_alloc(".builtin_regdb_keys",
790 KUIDT_INIT(0), KGIDT_INIT(0), current_cred(),
028db3e2
LT		 791 ((KEY_POS_ALL & ~KEY_POS_SETATTR) |
792 KEY_USR_VIEW | KEY_USR_READ | KEY_USR_SEARCH),
90a53e44
JB		 793 KEY_ALLOC_NOT_IN_QUOTA, NULL, NULL);
794 if (IS_ERR(builtin_regdb_keys))
795 return PTR_ERR(builtin_regdb_keys);
796
797 pr_notice("Loading compiled-in X.509 certificates for regulatory database\n");
798
799#ifdef CONFIG_CFG80211_USE_KERNEL_REGDB_KEYS
800 load_keys_from_buffer(shipped_regdb_certs, shipped_regdb_certs_len);
801#endif
88230ef1 802#ifdef CONFIG_CFG80211_EXTRA_REGDB_KEYDIR
90a53e44
JB		 803 if (CONFIG_CFG80211_EXTRA_REGDB_KEYDIR[0] != '\0')
804 load_keys_from_buffer(extra_regdb_certs, extra_regdb_certs_len);
805#endif
806
807 return 0;
808}
809
7bc7981e
DJL		 810MODULE_FIRMWARE("regulatory.db.p7s");
811
90a53e44
JB		 812static bool regdb_has_valid_signature(const u8 *data, unsigned int size)
813{
814 const struct firmware *sig;
815 bool result;
816
817 if (request_firmware(&sig, "regulatory.db.p7s", &reg_pdev->dev))
818 return false;
819
820 result = verify_pkcs7_signature(data, size, sig->data, sig->size,
821 builtin_regdb_keys,
822 VERIFYING_UNSPECIFIED_SIGNATURE,
823 NULL, NULL) == 0;
824
825 release_firmware(sig);
826
827 return result;
828}
829
830static void free_regdb_keyring(void)
831{
832 key_put(builtin_regdb_keys);
833}
834#else
835static int load_builtin_regdb_keys(void)
836{
837 return 0;
838}
839
840static bool regdb_has_valid_signature(const u8 *data, unsigned int size)
841{
842 return true;
843}
844
845static void free_regdb_keyring(void)
846{
847}
848#endif /* CONFIG_CFG80211_REQUIRE_SIGNED_REGDB */
849
007f6c5e
JB		 850static bool valid_regdb(const u8 *data, unsigned int size)
851{
852 const struct fwdb_header *hdr = (void *)data;
853 const struct fwdb_country *country;
854
855 if (size < sizeof(*hdr))
856 return false;
857
858 if (hdr->magic != cpu_to_be32(FWDB_MAGIC))
859 return false;
860
861 if (hdr->version != cpu_to_be32(FWDB_VERSION))
862 return false;
863
90a53e44
JB		 864 if (!regdb_has_valid_signature(data, size))
865 return false;
866
007f6c5e
JB		 867 country = &hdr->country[0];
868 while ((u8 *)(country + 1) <= data + size) {
869 if (!country->coll_ptr)
870 break;
871 if (!valid_country(data, size, country))
872 return false;
873 country++;
874 }
875
876 return true;
877}
878
014f5a25
SG		 879static void set_wmm_rule(const struct fwdb_header *db,
880 const struct fwdb_country *country,
881 const struct fwdb_rule *rule,
882 struct ieee80211_reg_rule *rrule)
883{
884 struct ieee80211_wmm_rule *wmm_rule = &rrule->wmm_rule;
885 struct fwdb_wmm_rule *wmm;
886 unsigned int i, wmm_ptr;
887
888 wmm_ptr = be16_to_cpu(rule->wmm_ptr) << 2;
889 wmm = (void *)((u8 *)db + wmm_ptr);
890
891 if (!valid_wmm(wmm)) {
892 pr_err("Invalid regulatory WMM rule %u-%u in domain %c%c\n",
893 be32_to_cpu(rule->start), be32_to_cpu(rule->end),
894 country->alpha2[0], country->alpha2[1]);
895 return;
896 }
230ebaa1
HD		 897
898 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
014f5a25 899 wmm_rule->client[i].cw_min =
230ebaa1 900 ecw2cw((wmm->client[i].ecw & 0xf0) >> 4);
014f5a25
SG		 901 wmm_rule->client[i].cw_max = ecw2cw(wmm->client[i].ecw & 0x0f);
902 wmm_rule->client[i].aifsn = wmm->client[i].aifsn;
903 wmm_rule->client[i].cot =
904 1000 * be16_to_cpu(wmm->client[i].cot);
905 wmm_rule->ap[i].cw_min = ecw2cw((wmm->ap[i].ecw & 0xf0) >> 4);
906 wmm_rule->ap[i].cw_max = ecw2cw(wmm->ap[i].ecw & 0x0f);
907 wmm_rule->ap[i].aifsn = wmm->ap[i].aifsn;
908 wmm_rule->ap[i].cot = 1000 * be16_to_cpu(wmm->ap[i].cot);
230ebaa1 909 }
38cb87ee
SG		 910
911 rrule->has_wmm = true;
230ebaa1
HD		 912}
913
19d3577e
HD		 914static int __regdb_query_wmm(const struct fwdb_header *db,
915 const struct fwdb_country *country, int freq,
014f5a25 916 struct ieee80211_reg_rule *rrule)
19d3577e
HD		 917{
918 unsigned int ptr = be16_to_cpu(country->coll_ptr) << 2;
919 struct fwdb_collection *coll = (void *)((u8 *)db + ptr);
920 int i;
921
922 for (i = 0; i < coll->n_rules; i++) {
923 __be16 *rules_ptr = (void *)((u8 *)coll + ALIGN(coll->len, 2));
924 unsigned int rule_ptr = be16_to_cpu(rules_ptr[i]) << 2;
014f5a25 925 struct fwdb_rule *rule = (void *)((u8 *)db + rule_ptr);
19d3577e 926
014f5a25 927 if (rule->len < offsetofend(struct fwdb_rule, wmm_ptr))
19d3577e
HD		 928 continue;
929
014f5a25
SG		 930 if (freq >= KHZ_TO_MHZ(be32_to_cpu(rule->start)) &&
931 freq <= KHZ_TO_MHZ(be32_to_cpu(rule->end))) {
932 set_wmm_rule(db, country, rule, rrule);
19d3577e
HD		 933 return 0;
934 }
935 }
936
937 return -ENODATA;
938}
939
38cb87ee 940int reg_query_regdb_wmm(char *alpha2, int freq, struct ieee80211_reg_rule *rule)
19d3577e
HD		 941{
942 const struct fwdb_header *hdr = regdb;
943 const struct fwdb_country *country;
944
5247a77c
HD		 945 if (!regdb)
946 return -ENODATA;
947
19d3577e
HD		 948 if (IS_ERR(regdb))
949 return PTR_ERR(regdb);
950
951 country = &hdr->country[0];
952 while (country->coll_ptr) {
953 if (alpha2_equal(alpha2, country->alpha2))
38cb87ee 954 return __regdb_query_wmm(regdb, country, freq, rule);
19d3577e
HD		 955
956 country++;
957 }
958
959 return -ENODATA;
960}
961EXPORT_SYMBOL(reg_query_regdb_wmm);
962
007f6c5e
JB		 963static int regdb_query_country(const struct fwdb_header *db,
964 const struct fwdb_country *country)
965{
966 unsigned int ptr = be16_to_cpu(country->coll_ptr) << 2;
967 struct fwdb_collection *coll = (void *)((u8 *)db + ptr);
968 struct ieee80211_regdomain *regdom;
9f8c7136 969 unsigned int i;
007f6c5e 970
9f8c7136
GS		 971 regdom = kzalloc(struct_size(regdom, reg_rules, coll->n_rules),
972 GFP_KERNEL);
007f6c5e
JB		 973 if (!regdom)
974 return -ENOMEM;
975
976 regdom->n_reg_rules = coll->n_rules;
977 regdom->alpha2[0] = country->alpha2[0];
978 regdom->alpha2[1] = country->alpha2[1];
979 regdom->dfs_region = coll->dfs_region;
980
981 for (i = 0; i < regdom->n_reg_rules; i++) {
982 __be16 *rules_ptr = (void *)((u8 *)coll + ALIGN(coll->len, 2));
983 unsigned int rule_ptr = be16_to_cpu(rules_ptr[i]) << 2;
984 struct fwdb_rule *rule = (void *)((u8 *)db + rule_ptr);
985 struct ieee80211_reg_rule *rrule = &regdom->reg_rules[i];
986
987 rrule->freq_range.start_freq_khz = be32_to_cpu(rule->start);
988 rrule->freq_range.end_freq_khz = be32_to_cpu(rule->end);
989 rrule->freq_range.max_bandwidth_khz = be32_to_cpu(rule->max_bw);
990
991 rrule->power_rule.max_antenna_gain = 0;
992 rrule->power_rule.max_eirp = be16_to_cpu(rule->max_eirp);
993
994 rrule->flags = 0;
995 if (rule->flags & FWDB_FLAG_NO_OFDM)
996 rrule->flags |= NL80211_RRF_NO_OFDM;
997 if (rule->flags & FWDB_FLAG_NO_OUTDOOR)
998 rrule->flags |= NL80211_RRF_NO_OUTDOOR;
999 if (rule->flags & FWDB_FLAG_DFS)
1000 rrule->flags |= NL80211_RRF_DFS;
1001 if (rule->flags & FWDB_FLAG_NO_IR)
1002 rrule->flags |= NL80211_RRF_NO_IR;
1003 if (rule->flags & FWDB_FLAG_AUTO_BW)
1004 rrule->flags |= NL80211_RRF_AUTO_BW;
1005
1006 rrule->dfs_cac_ms = 0;
1007
1008 /* handle optional data */
1009 if (rule->len >= offsetofend(struct fwdb_rule, cac_timeout))
1010 rrule->dfs_cac_ms =
1011 1000 * be16_to_cpu(rule->cac_timeout);
014f5a25
SG		 1012 if (rule->len >= offsetofend(struct fwdb_rule, wmm_ptr))
1013 set_wmm_rule(db, country, rule, rrule);
007f6c5e
JB		 1014 }
1015
1016 return reg_schedule_apply(regdom);
1017}
1018
1019static int query_regdb(const char *alpha2)
1020{
1021 const struct fwdb_header *hdr = regdb;
1022 const struct fwdb_country *country;
1023
1ea4ff3e
JB		 1024 ASSERT_RTNL();
1025
007f6c5e
JB		 1026 if (IS_ERR(regdb))
1027 return PTR_ERR(regdb);
1028
1029 country = &hdr->country[0];
1030 while (country->coll_ptr) {
1031 if (alpha2_equal(alpha2, country->alpha2))
1032 return regdb_query_country(regdb, country);
1033 country++;
1034 }
1035
1036 return -ENODATA;
1037}
1038
1039static void regdb_fw_cb(const struct firmware *fw, void *context)
1040{
1ea4ff3e
JB		 1041 int set_error = 0;
1042 bool restore = true;
007f6c5e
JB		 1043 void *db;
1044
1045 if (!fw) {
1046 pr_info("failed to load regulatory.db\n");
1ea4ff3e
JB		 1047 set_error = -ENODATA;
1048 } else if (!valid_regdb(fw->data, fw->size)) {
90a53e44 1049 pr_info("loaded regulatory.db is malformed or signature is missing/invalid\n");
1ea4ff3e 1050 set_error = -EINVAL;
007f6c5e
JB		 1051 }
1052
1ea4ff3e 1053 rtnl_lock();
faae54ad
CT		 1054 if (regdb && !IS_ERR(regdb)) {
1055 /* negative case - a bug
1056 * positive case - can happen due to race in case of multiple cb's in
1057 * queue, due to usage of asynchronous callback
1058 *
1059 * Either case, just restore and free new db.
1060 */
1ea4ff3e
JB		 1061 } else if (set_error) {
1062 regdb = ERR_PTR(set_error);
1063 } else if (fw) {
1064 db = kmemdup(fw->data, fw->size, GFP_KERNEL);
1065 if (db) {
1066 regdb = db;
1067 restore = context && query_regdb(context);
1068 } else {
1069 restore = true;
1070 }
007f6c5e
JB		 1071 }
1072
1ea4ff3e 1073 if (restore)
e646a025 1074 restore_regulatory_settings(true, false);
007f6c5e 1075
007f6c5e 1076 rtnl_unlock();
1ea4ff3e 1077
007f6c5e 1078 kfree(context);
1ea4ff3e
JB		 1079
1080 release_firmware(fw);
007f6c5e
JB		 1081}
1082
7bc7981e
DJL		 1083MODULE_FIRMWARE("regulatory.db");
1084
007f6c5e
JB		 1085static int query_regdb_file(const char *alpha2)
1086{
57b962e6
AS		 1087 int err;
1088
1ea4ff3e
JB		 1089 ASSERT_RTNL();
1090
007f6c5e
JB		 1091 if (regdb)
1092 return query_regdb(alpha2);
1093
1094 alpha2 = kmemdup(alpha2, 2, GFP_KERNEL);
1095 if (!alpha2)
1096 return -ENOMEM;
1097
57b962e6
AS		 1098 err = request_firmware_nowait(THIS_MODULE, true, "regulatory.db",
1099 &reg_pdev->dev, GFP_KERNEL,
1100 (void *)alpha2, regdb_fw_cb);
1101 if (err)
1102 kfree(alpha2);
1103
1104 return err;
007f6c5e
JB		 1105}
1106
1ea4ff3e
JB		 1107int reg_reload_regdb(void)
1108{
1109 const struct firmware *fw;
1110 void *db;
1111 int err;
1eda9191
FB		 1112 const struct ieee80211_regdomain *current_regdomain;
1113 struct regulatory_request *request;
1ea4ff3e
JB		 1114
1115 err = request_firmware(&fw, "regulatory.db", &reg_pdev->dev);
1116 if (err)
1117 return err;
1118
1119 if (!valid_regdb(fw->data, fw->size)) {
1120 err = -ENODATA;
1121 goto out;
1122 }
1123
1124 db = kmemdup(fw->data, fw->size, GFP_KERNEL);
1125 if (!db) {
1126 err = -ENOMEM;
1127 goto out;
1128 }
1129
1130 rtnl_lock();
1131 if (!IS_ERR_OR_NULL(regdb))
1132 kfree(regdb);
1133 regdb = db;
1ea4ff3e 1134
1eda9191
FB		 1135 /* reset regulatory domain */
1136 current_regdomain = get_cfg80211_regdom();
1137
1138 request = kzalloc(sizeof(*request), GFP_KERNEL);
1139 if (!request) {
1140 err = -ENOMEM;
1141 goto out_unlock;
1142 }
1143
1144 request->wiphy_idx = WIPHY_IDX_INVALID;
1145 request->alpha2[0] = current_regdomain->alpha2[0];
1146 request->alpha2[1] = current_regdomain->alpha2[1];
37d33114 1147 request->initiator = NL80211_REGDOM_SET_BY_CORE;
1eda9191 1148 request->user_reg_hint_type = NL80211_USER_REG_HINT_USER;
1eda9191
FB		 1149
1150 reg_process_hint(request);
1151
1152out_unlock:
1153 rtnl_unlock();
1ea4ff3e
JB		 1154 out:
1155 release_firmware(fw);
1156 return err;
1157}
1158
cecbb069 1159static bool reg_query_database(struct regulatory_request *request)
fe6631ff 1160{
007f6c5e
JB		 1161 if (query_regdb_file(request->alpha2) == 0)
1162 return true;
1163
c7d319e5
JB		 1164 if (call_crda(request->alpha2) == 0)
1165 return true;
1166
1167 return false;
fe6631ff
LR		 1168}
1169
e438768f 1170bool reg_is_valid_request(const char *alpha2)
b2e1b302 1171{
c492db37 1172 struct regulatory_request *lr = get_last_request();
61405e97 1173
c492db37 1174 if (!lr || lr->processed)
f6037d09
JB		 1175 return false;
1176
c492db37 1177 return alpha2_equal(lr->alpha2, alpha2);
b2e1b302 1178}
8318d78a 1179
e3961af1
JD		 1180static const struct ieee80211_regdomain *reg_get_regdomain(struct wiphy *wiphy)
1181{
1182 struct regulatory_request *lr = get_last_request();
1183
1184 /*
1185 * Follow the driver's regulatory domain, if present, unless a country
1186 * IE has been processed or a user wants to help complaince further
1187 */
1188 if (lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE &&
1189 lr->initiator != NL80211_REGDOM_SET_BY_USER &&
1190 wiphy->regd)
1191 return get_wiphy_regdom(wiphy);
1192
1193 return get_cfg80211_regdom();
1194}
1195
a6d4a534
AN		 1196static unsigned int
1197reg_get_max_bandwidth_from_range(const struct ieee80211_regdomain *rd,
1198 const struct ieee80211_reg_rule *rule)
97524820
JD		 1199{
1200 const struct ieee80211_freq_range *freq_range = &rule->freq_range;
1201 const struct ieee80211_freq_range *freq_range_tmp;
1202 const struct ieee80211_reg_rule *tmp;
1203 u32 start_freq, end_freq, idx, no;
1204
1205 for (idx = 0; idx < rd->n_reg_rules; idx++)
1206 if (rule == &rd->reg_rules[idx])
1207 break;
1208
1209 if (idx == rd->n_reg_rules)
1210 return 0;
1211
1212 /* get start_freq */
1213 no = idx;
1214
1215 while (no) {
1216 tmp = &rd->reg_rules[--no];
1217 freq_range_tmp = &tmp->freq_range;
1218
1219 if (freq_range_tmp->end_freq_khz < freq_range->start_freq_khz)
1220 break;
1221
97524820
JD		 1222 freq_range = freq_range_tmp;
1223 }
1224
1225 start_freq = freq_range->start_freq_khz;
1226
1227 /* get end_freq */
1228 freq_range = &rule->freq_range;
1229 no = idx;
1230
1231 while (no < rd->n_reg_rules - 1) {
1232 tmp = &rd->reg_rules[++no];
1233 freq_range_tmp = &tmp->freq_range;
1234
1235 if (freq_range_tmp->start_freq_khz > freq_range->end_freq_khz)
1236 break;
1237
97524820
JD		 1238 freq_range = freq_range_tmp;
1239 }
1240
1241 end_freq = freq_range->end_freq_khz;
1242
1243 return end_freq - start_freq;
1244}
1245
a6d4a534
AN		 1246unsigned int reg_get_max_bandwidth(const struct ieee80211_regdomain *rd,
1247 const struct ieee80211_reg_rule *rule)
1248{
1249 unsigned int bw = reg_get_max_bandwidth_from_range(rd, rule);
1250
c2b3d769
S		 1251 if (rule->flags & NL80211_RRF_NO_320MHZ)
1252 bw = min_t(unsigned int, bw, MHZ_TO_KHZ(160));
a6d4a534
AN		 1253 if (rule->flags & NL80211_RRF_NO_160MHZ)
1254 bw = min_t(unsigned int, bw, MHZ_TO_KHZ(80));
1255 if (rule->flags & NL80211_RRF_NO_80MHZ)
1256 bw = min_t(unsigned int, bw, MHZ_TO_KHZ(40));
1257
1258 /*
1259 * HT40+/HT40- limits are handled per-channel. Only limit BW if both
1260 * are not allowed.
1261 */
1262 if (rule->flags & NL80211_RRF_NO_HT40MINUS &&
1263 rule->flags & NL80211_RRF_NO_HT40PLUS)
1264 bw = min_t(unsigned int, bw, MHZ_TO_KHZ(20));
1265
1266 return bw;
1267}
1268
b2e1b302 1269/* Sanity check on a regulatory rule */
a3d2eaf0 1270static bool is_valid_reg_rule(const struct ieee80211_reg_rule *rule)
8318d78a 1271{
a3d2eaf0 1272 const struct ieee80211_freq_range *freq_range = &rule->freq_range;
b2e1b302
LR		 1273 u32 freq_diff;
1274
91e99004 1275 if (freq_range->start_freq_khz <= 0 || freq_range->end_freq_khz <= 0)
b2e1b302
LR		 1276 return false;
1277
1278 if (freq_range->start_freq_khz > freq_range->end_freq_khz)
1279 return false;
1280
1281 freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz;
1282
bd05f28e 1283 if (freq_range->end_freq_khz <= freq_range->start_freq_khz ||
1a919318 1284 freq_range->max_bandwidth_khz > freq_diff)
b2e1b302
LR		 1285 return false;
1286
1287 return true;
1288}
1289
a3d2eaf0 1290static bool is_valid_rd(const struct ieee80211_regdomain *rd)
b2e1b302 1291{
a3d2eaf0 1292 const struct ieee80211_reg_rule *reg_rule = NULL;
b2e1b302 1293 unsigned int i;
8318d78a 1294
b2e1b302
LR		 1295 if (!rd->n_reg_rules)
1296 return false;
8318d78a 1297
88dc1c3f
LR		 1298 if (WARN_ON(rd->n_reg_rules > NL80211_MAX_SUPP_REG_RULES))
1299 return false;
1300
b2e1b302
LR		 1301 for (i = 0; i < rd->n_reg_rules; i++) {
1302 reg_rule = &rd->reg_rules[i];
1303 if (!is_valid_reg_rule(reg_rule))
1304 return false;
1305 }
1306
1307 return true;
8318d78a
JB		 1308}
1309
0c7dc45d
LR		 1310/**
1311 * freq_in_rule_band - tells us if a frequency is in a frequency band
1312 * @freq_range: frequency rule we want to query
1313 * @freq_khz: frequency we are inquiring about
1314 *
1315 * This lets us know if a specific frequency rule is or is not relevant to
1316 * a specific frequency's band. Bands are device specific and artificial
64629b9d
VK		 1317 * definitions (the "2.4 GHz band", the "5 GHz band" and the "60GHz band"),
1318 * however it is safe for now to assume that a frequency rule should not be
1319 * part of a frequency's band if the start freq or end freq are off by more
93183bdb 1320 * than 2 GHz for the 2.4 and 5 GHz bands, and by more than 20 GHz for the
64629b9d 1321 * 60 GHz band.
0c7dc45d
LR		 1322 * This resolution can be lowered and should be considered as we add
1323 * regulatory rule support for other "bands".
1324 **/
1325static bool freq_in_rule_band(const struct ieee80211_freq_range *freq_range,
1a919318 1326 u32 freq_khz)
0c7dc45d
LR		 1327{
1328#define ONE_GHZ_IN_KHZ 1000000
64629b9d
VK		 1329 /*
1330 * From 802.11ad: directional multi-gigabit (DMG):
1331 * Pertaining to operation in a frequency band containing a channel
1332 * with the Channel starting frequency above 45 GHz.
1333 */
1334 u32 limit = freq_khz > 45 * ONE_GHZ_IN_KHZ ?
93183bdb 1335 20 * ONE_GHZ_IN_KHZ : 2 * ONE_GHZ_IN_KHZ;
64629b9d 1336 if (abs(freq_khz - freq_range->start_freq_khz) <= limit)
0c7dc45d 1337 return true;
64629b9d 1338 if (abs(freq_khz - freq_range->end_freq_khz) <= limit)
0c7dc45d
LR		 1339 return true;
1340 return false;
1341#undef ONE_GHZ_IN_KHZ
1342}
1343
adbfb058
LR		 1344/*
1345 * Later on we can perhaps use the more restrictive DFS
1346 * region but we don't have information for that yet so
1347 * for now simply disallow conflicts.
1348 */
1349static enum nl80211_dfs_regions
1350reg_intersect_dfs_region(const enum nl80211_dfs_regions dfs_region1,
1351 const enum nl80211_dfs_regions dfs_region2)
1352{
1353 if (dfs_region1 != dfs_region2)
1354 return NL80211_DFS_UNSET;
1355 return dfs_region1;
1356}
1357
08a75a88
IP		 1358static void reg_wmm_rules_intersect(const struct ieee80211_wmm_ac *wmm_ac1,
1359 const struct ieee80211_wmm_ac *wmm_ac2,
1360 struct ieee80211_wmm_ac *intersect)
1361{
1362 intersect->cw_min = max_t(u16, wmm_ac1->cw_min, wmm_ac2->cw_min);
1363 intersect->cw_max = max_t(u16, wmm_ac1->cw_max, wmm_ac2->cw_max);
1364 intersect->cot = min_t(u16, wmm_ac1->cot, wmm_ac2->cot);
1365 intersect->aifsn = max_t(u8, wmm_ac1->aifsn, wmm_ac2->aifsn);
1366}
1367
fb1fc7ad
LR		 1368/*
1369 * Helper for regdom_intersect(), this does the real
1370 * mathematical intersection fun
1371 */
97524820
JD		 1372static int reg_rules_intersect(const struct ieee80211_regdomain *rd1,
1373 const struct ieee80211_regdomain *rd2,
1374 const struct ieee80211_reg_rule *rule1,
1a919318
JB		 1375 const struct ieee80211_reg_rule *rule2,
1376 struct ieee80211_reg_rule *intersected_rule)
9c96477d
LR		 1377{
1378 const struct ieee80211_freq_range *freq_range1, *freq_range2;
1379 struct ieee80211_freq_range *freq_range;
1380 const struct ieee80211_power_rule *power_rule1, *power_rule2;
1381 struct ieee80211_power_rule *power_rule;
08a75a88
IP		 1382 const struct ieee80211_wmm_rule *wmm_rule1, *wmm_rule2;
1383 struct ieee80211_wmm_rule *wmm_rule;
97524820 1384 u32 freq_diff, max_bandwidth1, max_bandwidth2;
9c96477d
LR		 1385
1386 freq_range1 = &rule1->freq_range;
1387 freq_range2 = &rule2->freq_range;
1388 freq_range = &intersected_rule->freq_range;
1389
1390 power_rule1 = &rule1->power_rule;
1391 power_rule2 = &rule2->power_rule;
1392 power_rule = &intersected_rule->power_rule;
1393
08a75a88
IP		 1394 wmm_rule1 = &rule1->wmm_rule;
1395 wmm_rule2 = &rule2->wmm_rule;
1396 wmm_rule = &intersected_rule->wmm_rule;
1397
9c96477d 1398 freq_range->start_freq_khz = max(freq_range1->start_freq_khz,
1a919318 1399 freq_range2->start_freq_khz);
9c96477d 1400 freq_range->end_freq_khz = min(freq_range1->end_freq_khz,
1a919318 1401 freq_range2->end_freq_khz);
97524820
JD		 1402
1403 max_bandwidth1 = freq_range1->max_bandwidth_khz;
1404 max_bandwidth2 = freq_range2->max_bandwidth_khz;
1405
b0dfd2ea
JD		 1406 if (rule1->flags & NL80211_RRF_AUTO_BW)
1407 max_bandwidth1 = reg_get_max_bandwidth(rd1, rule1);
1408 if (rule2->flags & NL80211_RRF_AUTO_BW)
1409 max_bandwidth2 = reg_get_max_bandwidth(rd2, rule2);
97524820
JD		 1410
1411 freq_range->max_bandwidth_khz = min(max_bandwidth1, max_bandwidth2);
9c96477d 1412
b0dfd2ea
JD		 1413 intersected_rule->flags = rule1->flags | rule2->flags;
1414
1415 /*
1416 * In case NL80211_RRF_AUTO_BW requested for both rules
1417 * set AUTO_BW in intersected rule also. Next we will
1418 * calculate BW correctly in handle_channel function.
1419 * In other case remove AUTO_BW flag while we calculate
1420 * maximum bandwidth correctly and auto calculation is
1421 * not required.
1422 */
1423 if ((rule1->flags & NL80211_RRF_AUTO_BW) &&
1424 (rule2->flags & NL80211_RRF_AUTO_BW))
1425 intersected_rule->flags |= NL80211_RRF_AUTO_BW;
1426 else
1427 intersected_rule->flags &= ~NL80211_RRF_AUTO_BW;
1428
9c96477d
LR		 1429 freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz;
1430 if (freq_range->max_bandwidth_khz > freq_diff)
1431 freq_range->max_bandwidth_khz = freq_diff;
1432
1433 power_rule->max_eirp = min(power_rule1->max_eirp,
1434 power_rule2->max_eirp);
1435 power_rule->max_antenna_gain = min(power_rule1->max_antenna_gain,
1436 power_rule2->max_antenna_gain);
1437
089027e5
JD		 1438 intersected_rule->dfs_cac_ms = max(rule1->dfs_cac_ms,
1439 rule2->dfs_cac_ms);
1440
08a75a88
IP		 1441 if (rule1->has_wmm && rule2->has_wmm) {
1442 u8 ac;
1443
1444 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1445 reg_wmm_rules_intersect(&wmm_rule1->client[ac],
1446 &wmm_rule2->client[ac],
1447 &wmm_rule->client[ac]);
1448 reg_wmm_rules_intersect(&wmm_rule1->ap[ac],
1449 &wmm_rule2->ap[ac],
1450 &wmm_rule->ap[ac]);
1451 }
1452
1453 intersected_rule->has_wmm = true;
1454 } else if (rule1->has_wmm) {
1455 *wmm_rule = *wmm_rule1;
1456 intersected_rule->has_wmm = true;
1457 } else if (rule2->has_wmm) {
1458 *wmm_rule = *wmm_rule2;
1459 intersected_rule->has_wmm = true;
1460 } else {
1461 intersected_rule->has_wmm = false;
1462 }
1463
9c96477d
LR		 1464 if (!is_valid_reg_rule(intersected_rule))
1465 return -EINVAL;
1466
1467 return 0;
1468}
1469
a62a1aed
EP		 1470/* check whether old rule contains new rule */
1471static bool rule_contains(struct ieee80211_reg_rule *r1,
1472 struct ieee80211_reg_rule *r2)
1473{
1474 /* for simplicity, currently consider only same flags */
1475 if (r1->flags != r2->flags)
1476 return false;
1477
1478 /* verify r1 is more restrictive */
1479 if ((r1->power_rule.max_antenna_gain >
1480 r2->power_rule.max_antenna_gain) ||
1481 r1->power_rule.max_eirp > r2->power_rule.max_eirp)
1482 return false;
1483
1484 /* make sure r2's range is contained within r1 */
1485 if (r1->freq_range.start_freq_khz > r2->freq_range.start_freq_khz ||
1486 r1->freq_range.end_freq_khz < r2->freq_range.end_freq_khz)
1487 return false;
1488
1489 /* and finally verify that r1.max_bw >= r2.max_bw */
1490 if (r1->freq_range.max_bandwidth_khz <
1491 r2->freq_range.max_bandwidth_khz)
1492 return false;
1493
1494 return true;
1495}
1496
1497/* add or extend current rules. do nothing if rule is already contained */
1498static void add_rule(struct ieee80211_reg_rule *rule,
1499 struct ieee80211_reg_rule *reg_rules, u32 *n_rules)
1500{
1501 struct ieee80211_reg_rule *tmp_rule;
1502 int i;
1503
1504 for (i = 0; i < *n_rules; i++) {
1505 tmp_rule = &reg_rules[i];
1506 /* rule is already contained - do nothing */
1507 if (rule_contains(tmp_rule, rule))
1508 return;
1509
1510 /* extend rule if possible */
1511 if (rule_contains(rule, tmp_rule)) {
1512 memcpy(tmp_rule, rule, sizeof(*rule));
1513 return;
1514 }
1515 }
1516
1517 memcpy(&reg_rules[*n_rules], rule, sizeof(*rule));
1518 (*n_rules)++;
1519}
1520
9c96477d
LR		 1521/**
1522 * regdom_intersect - do the intersection between two regulatory domains
1523 * @rd1: first regulatory domain
1524 * @rd2: second regulatory domain
1525 *
1526 * Use this function to get the intersection between two regulatory domains.
1527 * Once completed we will mark the alpha2 for the rd as intersected, "98",
1528 * as no one single alpha2 can represent this regulatory domain.
1529 *
1530 * Returns a pointer to the regulatory domain structure which will hold the
1531 * resulting intersection of rules between rd1 and rd2. We will
1532 * kzalloc() this structure for you.
1533 */
1a919318
JB		 1534static struct ieee80211_regdomain *
1535regdom_intersect(const struct ieee80211_regdomain *rd1,
1536 const struct ieee80211_regdomain *rd2)
9c96477d 1537{
9f8c7136 1538 int r;
9c96477d 1539 unsigned int x, y;
a62a1aed 1540 unsigned int num_rules = 0;
9c96477d 1541 const struct ieee80211_reg_rule *rule1, *rule2;
a62a1aed 1542 struct ieee80211_reg_rule intersected_rule;
9c96477d 1543 struct ieee80211_regdomain *rd;
9c96477d
LR		 1544
1545 if (!rd1 || !rd2)
1546 return NULL;
1547
fb1fc7ad
LR		 1548 /*
1549 * First we get a count of the rules we'll need, then we actually
9c96477d
LR		 1550 * build them. This is to so we can malloc() and free() a
1551 * regdomain once. The reason we use reg_rules_intersect() here
1552 * is it will return -EINVAL if the rule computed makes no sense.
fb1fc7ad
LR		 1553 * All rules that do check out OK are valid.
1554 */
9c96477d
LR		 1555
1556 for (x = 0; x < rd1->n_reg_rules; x++) {
1557 rule1 = &rd1->reg_rules[x];
1558 for (y = 0; y < rd2->n_reg_rules; y++) {
1559 rule2 = &rd2->reg_rules[y];
97524820 1560 if (!reg_rules_intersect(rd1, rd2, rule1, rule2,
a62a1aed 1561 &intersected_rule))
9c96477d 1562 num_rules++;
9c96477d
LR		 1563 }
1564 }
1565
1566 if (!num_rules)
1567 return NULL;
1568
9f8c7136 1569 rd = kzalloc(struct_size(rd, reg_rules, num_rules), GFP_KERNEL);
9c96477d
LR		 1570 if (!rd)
1571 return NULL;
1572
a62a1aed 1573 for (x = 0; x < rd1->n_reg_rules; x++) {
9c96477d 1574 rule1 = &rd1->reg_rules[x];
a62a1aed 1575 for (y = 0; y < rd2->n_reg_rules; y++) {
9c96477d 1576 rule2 = &rd2->reg_rules[y];
97524820 1577 r = reg_rules_intersect(rd1, rd2, rule1, rule2,
a62a1aed 1578 &intersected_rule);
fb1fc7ad
LR		 1579 /*
1580 * No need to memset here the intersected rule here as
1581 * we're not using the stack anymore
1582 */
9c96477d
LR		 1583 if (r)
1584 continue;
9c96477d 1585
a62a1aed
EP		 1586 add_rule(&intersected_rule, rd->reg_rules,
1587 &rd->n_reg_rules);
1588 }
9c96477d
LR		 1589 }
1590
9c96477d
LR		 1591 rd->alpha2[0] = '9';
1592 rd->alpha2[1] = '8';
adbfb058
LR		 1593 rd->dfs_region = reg_intersect_dfs_region(rd1->dfs_region,
1594 rd2->dfs_region);
9c96477d
LR		 1595
1596 return rd;
1597}
1598
fb1fc7ad
LR		 1599/*
1600 * XXX: add support for the rest of enum nl80211_reg_rule_flags, we may
1601 * want to just have the channel structure use these
1602 */
b2e1b302
LR		 1603static u32 map_regdom_flags(u32 rd_flags)
1604{
1605 u32 channel_flags = 0;
8fe02e16
LR		 1606 if (rd_flags & NL80211_RRF_NO_IR_ALL)
1607 channel_flags |= IEEE80211_CHAN_NO_IR;
b2e1b302
LR		 1608 if (rd_flags & NL80211_RRF_DFS)
1609 channel_flags |= IEEE80211_CHAN_RADAR;
03f6b084
SF		 1610 if (rd_flags & NL80211_RRF_NO_OFDM)
1611 channel_flags |= IEEE80211_CHAN_NO_OFDM;
570dbde1
DS		 1612 if (rd_flags & NL80211_RRF_NO_OUTDOOR)
1613 channel_flags |= IEEE80211_CHAN_INDOOR_ONLY;
06f207fc
AN		 1614 if (rd_flags & NL80211_RRF_IR_CONCURRENT)
1615 channel_flags |= IEEE80211_CHAN_IR_CONCURRENT;
a6d4a534
AN		 1616 if (rd_flags & NL80211_RRF_NO_HT40MINUS)
1617 channel_flags |= IEEE80211_CHAN_NO_HT40MINUS;
1618 if (rd_flags & NL80211_RRF_NO_HT40PLUS)
1619 channel_flags |= IEEE80211_CHAN_NO_HT40PLUS;
1620 if (rd_flags & NL80211_RRF_NO_80MHZ)
1621 channel_flags |= IEEE80211_CHAN_NO_80MHZ;
1622 if (rd_flags & NL80211_RRF_NO_160MHZ)
1623 channel_flags |= IEEE80211_CHAN_NO_160MHZ;
1e61d82c
HD		 1624 if (rd_flags & NL80211_RRF_NO_HE)
1625 channel_flags |= IEEE80211_CHAN_NO_HE;
c2b3d769
S		 1626 if (rd_flags & NL80211_RRF_NO_320MHZ)
1627 channel_flags |= IEEE80211_CHAN_NO_320MHZ;
b2e1b302
LR		 1628 return channel_flags;
1629}
1630
361c9c8b 1631static const struct ieee80211_reg_rule *
49172874 1632freq_reg_info_regd(u32 center_freq,
4edd5698 1633 const struct ieee80211_regdomain *regd, u32 bw)
8318d78a
JB		 1634{
1635 int i;
0c7dc45d 1636 bool band_rule_found = false;
038659e7
LR		 1637 bool bw_fits = false;
1638
3e0c3ff3 1639 if (!regd)
361c9c8b 1640 return ERR_PTR(-EINVAL);
b2e1b302 1641
3e0c3ff3 1642 for (i = 0; i < regd->n_reg_rules; i++) {
b2e1b302
LR		 1643 const struct ieee80211_reg_rule *rr;
1644 const struct ieee80211_freq_range *fr = NULL;
b2e1b302 1645
3e0c3ff3 1646 rr = &regd->reg_rules[i];
b2e1b302 1647 fr = &rr->freq_range;
0c7dc45d 1648
fb1fc7ad
LR		 1649 /*
1650 * We only need to know if one frequency rule was
cc5a639b 1651 * in center_freq's band, that's enough, so let's
fb1fc7ad
LR		 1652 * not overwrite it once found
1653 */
0c7dc45d
LR		 1654 if (!band_rule_found)
1655 band_rule_found = freq_in_rule_band(fr, center_freq);
1656
4787cfa0 1657 bw_fits = cfg80211_does_bw_fit_range(fr, center_freq, bw);
0c7dc45d 1658
361c9c8b
JB		 1659 if (band_rule_found && bw_fits)
1660 return rr;
8318d78a
JB		 1661 }
1662
0c7dc45d 1663 if (!band_rule_found)
361c9c8b 1664 return ERR_PTR(-ERANGE);
0c7dc45d 1665
361c9c8b 1666 return ERR_PTR(-EINVAL);
b2e1b302
LR		 1667}
1668
8de1c63b
JB		 1669static const struct ieee80211_reg_rule *
1670__freq_reg_info(struct wiphy *wiphy, u32 center_freq, u32 min_bw)
1fa25e41 1671{
4edd5698 1672 const struct ieee80211_regdomain *regd = reg_get_regdomain(wiphy);
c7ed0e68 1673 static const u32 bws[] = {0, 1, 2, 4, 5, 8, 10, 16, 20};
9e6d5126 1674 const struct ieee80211_reg_rule *reg_rule = ERR_PTR(-ERANGE);
68dbad8c 1675 int i = ARRAY_SIZE(bws) - 1;
4edd5698 1676 u32 bw;
1a919318 1677
68dbad8c 1678 for (bw = MHZ_TO_KHZ(bws[i]); bw >= min_bw; bw = MHZ_TO_KHZ(bws[i--])) {
49172874 1679 reg_rule = freq_reg_info_regd(center_freq, regd, bw);
4edd5698
MM		 1680 if (!IS_ERR(reg_rule))
1681 return reg_rule;
1682 }
5d885b99 1683
4edd5698
MM		 1684 return reg_rule;
1685}
1686
1687const struct ieee80211_reg_rule *freq_reg_info(struct wiphy *wiphy,
1688 u32 center_freq)
1689{
68dbad8c
TP		 1690 u32 min_bw = center_freq < MHZ_TO_KHZ(1000) ? 1 : 20;
1691
1692 return __freq_reg_info(wiphy, center_freq, MHZ_TO_KHZ(min_bw));
1fa25e41 1693}
4f366c5d 1694EXPORT_SYMBOL(freq_reg_info);
b2e1b302 1695
034c6d6e 1696const char *reg_initiator_name(enum nl80211_reg_initiator initiator)
926a0a09
LR		 1697{
1698 switch (initiator) {
1699 case NL80211_REGDOM_SET_BY_CORE:
034c6d6e 1700 return "core";
926a0a09 1701 case NL80211_REGDOM_SET_BY_USER:
034c6d6e 1702 return "user";
926a0a09 1703 case NL80211_REGDOM_SET_BY_DRIVER:
034c6d6e 1704 return "driver";
926a0a09 1705 case NL80211_REGDOM_SET_BY_COUNTRY_IE:
8db0c433 1706 return "country element";
926a0a09
LR		 1707 default:
1708 WARN_ON(1);
034c6d6e 1709 return "bug";
926a0a09
LR		 1710 }
1711}
034c6d6e 1712EXPORT_SYMBOL(reg_initiator_name);
e702d3cf 1713
1aeb135f
MS		 1714static uint32_t reg_rule_to_chan_bw_flags(const struct ieee80211_regdomain *regd,
1715 const struct ieee80211_reg_rule *reg_rule,
1716 const struct ieee80211_channel *chan)
1717{
1718 const struct ieee80211_freq_range *freq_range = NULL;
934f4c7d 1719 u32 max_bandwidth_khz, center_freq_khz, bw_flags = 0;
68dbad8c 1720 bool is_s1g = chan->band == NL80211_BAND_S1GHZ;
1aeb135f
MS		 1721
1722 freq_range = &reg_rule->freq_range;
1723
1724 max_bandwidth_khz = freq_range->max_bandwidth_khz;
934f4c7d 1725 center_freq_khz = ieee80211_channel_to_khz(chan);
1aeb135f
MS		 1726 /* Check if auto calculation requested */
1727 if (reg_rule->flags & NL80211_RRF_AUTO_BW)
1728 max_bandwidth_khz = reg_get_max_bandwidth(regd, reg_rule);
1729
1730 /* If we get a reg_rule we can assume that at least 5Mhz fit */
4787cfa0 1731 if (!cfg80211_does_bw_fit_range(freq_range,
934f4c7d 1732 center_freq_khz,
4787cfa0 1733 MHZ_TO_KHZ(10)))
1aeb135f 1734 bw_flags |= IEEE80211_CHAN_NO_10MHZ;
4787cfa0 1735 if (!cfg80211_does_bw_fit_range(freq_range,
934f4c7d 1736 center_freq_khz,
4787cfa0 1737 MHZ_TO_KHZ(20)))
1aeb135f
MS		 1738 bw_flags |= IEEE80211_CHAN_NO_20MHZ;
1739
68dbad8c
TP		 1740 if (is_s1g) {
1741 /* S1G is strict about non overlapping channels. We can
1742 * calculate which bandwidth is allowed per channel by finding
1743 * the largest bandwidth which cleanly divides the freq_range.
1744 */
1745 int edge_offset;
1746 int ch_bw = max_bandwidth_khz;
1747
1748 while (ch_bw) {
1749 edge_offset = (center_freq_khz - ch_bw / 2) -
1750 freq_range->start_freq_khz;
1751 if (edge_offset % ch_bw == 0) {
1752 switch (KHZ_TO_MHZ(ch_bw)) {
1753 case 1:
1754 bw_flags |= IEEE80211_CHAN_1MHZ;
1755 break;
1756 case 2:
1757 bw_flags |= IEEE80211_CHAN_2MHZ;
1758 break;
1759 case 4:
1760 bw_flags |= IEEE80211_CHAN_4MHZ;
1761 break;
1762 case 8:
1763 bw_flags |= IEEE80211_CHAN_8MHZ;
1764 break;
1765 case 16:
1766 bw_flags |= IEEE80211_CHAN_16MHZ;
1767 break;
1768 default:
1769 /* If we got here, no bandwidths fit on
1770 * this frequency, ie. band edge.
1771 */
1772 bw_flags |= IEEE80211_CHAN_DISABLED;
1773 break;
1774 }
1775 break;
1776 }
1777 ch_bw /= 2;
1778 }
1779 } else {
1780 if (max_bandwidth_khz < MHZ_TO_KHZ(10))
1781 bw_flags |= IEEE80211_CHAN_NO_10MHZ;
1782 if (max_bandwidth_khz < MHZ_TO_KHZ(20))
1783 bw_flags |= IEEE80211_CHAN_NO_20MHZ;
1784 if (max_bandwidth_khz < MHZ_TO_KHZ(40))
1785 bw_flags |= IEEE80211_CHAN_NO_HT40;
1786 if (max_bandwidth_khz < MHZ_TO_KHZ(80))
1787 bw_flags |= IEEE80211_CHAN_NO_80MHZ;
1788 if (max_bandwidth_khz < MHZ_TO_KHZ(160))
1789 bw_flags |= IEEE80211_CHAN_NO_160MHZ;
c2b3d769
S		 1790 if (max_bandwidth_khz < MHZ_TO_KHZ(320))
1791 bw_flags |= IEEE80211_CHAN_NO_320MHZ;
68dbad8c 1792 }
1aeb135f
MS		 1793 return bw_flags;
1794}
1795
7c9ff7e2
MT		 1796static void handle_channel_single_rule(struct wiphy *wiphy,
1797 enum nl80211_reg_initiator initiator,
1798 struct ieee80211_channel *chan,
1799 u32 flags,
1800 struct regulatory_request *lr,
1801 struct wiphy *request_wiphy,
1802 const struct ieee80211_reg_rule *reg_rule)
1803{
1804 u32 bw_flags = 0;
b2e1b302 1805 const struct ieee80211_power_rule *power_rule = NULL;
97524820 1806 const struct ieee80211_regdomain *regd;
a92a3ce7 1807
b0dfd2ea 1808 regd = reg_get_regdomain(wiphy);
e702d3cf 1809
b2e1b302 1810 power_rule = &reg_rule->power_rule;
1aeb135f 1811 bw_flags = reg_rule_to_chan_bw_flags(regd, reg_rule, chan);
b2e1b302 1812
c492db37 1813 if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER &&
806a9e39 1814 request_wiphy && request_wiphy == wiphy &&
a2f73b6c 1815 request_wiphy->regulatory_flags & REGULATORY_STRICT_REG) {
fb1fc7ad 1816 /*
25985edc 1817 * This guarantees the driver's requested regulatory domain
f976376d 1818 * will always be used as a base for further regulatory
fb1fc7ad
LR		 1819 * settings
1820 */
f976376d 1821 chan->flags = chan->orig_flags =
038659e7 1822 map_regdom_flags(reg_rule->flags) | bw_flags;
f976376d
LR		 1823 chan->max_antenna_gain = chan->orig_mag =
1824 (int) MBI_TO_DBI(power_rule->max_antenna_gain);
279f0f55 1825 chan->max_reg_power = chan->max_power = chan->orig_mpwr =
f976376d 1826 (int) MBM_TO_DBM(power_rule->max_eirp);
4f267c11
JD		 1827
1828 if (chan->flags & IEEE80211_CHAN_RADAR) {
1829 chan->dfs_cac_ms = IEEE80211_DFS_MIN_CAC_TIME_MS;
1830 if (reg_rule->dfs_cac_ms)
1831 chan->dfs_cac_ms = reg_rule->dfs_cac_ms;
1832 }
1833
f976376d
LR		 1834 return;
1835 }
1836
04f39047
SW		 1837 chan->dfs_state = NL80211_DFS_USABLE;
1838 chan->dfs_state_entered = jiffies;
1839
aa3d7eef 1840 chan->beacon_found = false;
038659e7 1841 chan->flags = flags | bw_flags | map_regdom_flags(reg_rule->flags);
1a919318
JB		 1842 chan->max_antenna_gain =
1843 min_t(int, chan->orig_mag,
1844 MBI_TO_DBI(power_rule->max_antenna_gain));
eccc068e 1845 chan->max_reg_power = (int) MBM_TO_DBM(power_rule->max_eirp);
089027e5
JD		 1846
1847 if (chan->flags & IEEE80211_CHAN_RADAR) {
1848 if (reg_rule->dfs_cac_ms)
1849 chan->dfs_cac_ms = reg_rule->dfs_cac_ms;
1850 else
1851 chan->dfs_cac_ms = IEEE80211_DFS_MIN_CAC_TIME_MS;
1852 }
1853
5e31fc08
SG		 1854 if (chan->orig_mpwr) {
1855 /*
a09a85a0
LR		 1856 * Devices that use REGULATORY_COUNTRY_IE_FOLLOW_POWER
1857 * will always follow the passed country IE power settings.
5e31fc08
SG		 1858 */
1859 if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE &&
a09a85a0 1860 wiphy->regulatory_flags & REGULATORY_COUNTRY_IE_FOLLOW_POWER)
5e31fc08
SG		 1861 chan->max_power = chan->max_reg_power;
1862 else
1863 chan->max_power = min(chan->orig_mpwr,
1864 chan->max_reg_power);
1865 } else
1866 chan->max_power = chan->max_reg_power;
8318d78a
JB		 1867}
1868
12adee3c
MT		 1869static void handle_channel_adjacent_rules(struct wiphy *wiphy,
1870 enum nl80211_reg_initiator initiator,
1871 struct ieee80211_channel *chan,
1872 u32 flags,
1873 struct regulatory_request *lr,
1874 struct wiphy *request_wiphy,
1875 const struct ieee80211_reg_rule *rrule1,
1876 const struct ieee80211_reg_rule *rrule2,
1877 struct ieee80211_freq_range *comb_range)
1878{
1879 u32 bw_flags1 = 0;
1880 u32 bw_flags2 = 0;
1881 const struct ieee80211_power_rule *power_rule1 = NULL;
1882 const struct ieee80211_power_rule *power_rule2 = NULL;
1883 const struct ieee80211_regdomain *regd;
1884
1885 regd = reg_get_regdomain(wiphy);
1886
1887 power_rule1 = &rrule1->power_rule;
1888 power_rule2 = &rrule2->power_rule;
1889 bw_flags1 = reg_rule_to_chan_bw_flags(regd, rrule1, chan);
1890 bw_flags2 = reg_rule_to_chan_bw_flags(regd, rrule2, chan);
1891
1892 if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER &&
1893 request_wiphy && request_wiphy == wiphy &&
1894 request_wiphy->regulatory_flags & REGULATORY_STRICT_REG) {
1895 /* This guarantees the driver's requested regulatory domain
1896 * will always be used as a base for further regulatory
1897 * settings
1898 */
1899 chan->flags =
1900 map_regdom_flags(rrule1->flags) |
1901 map_regdom_flags(rrule2->flags) |
1902 bw_flags1 |
1903 bw_flags2;
1904 chan->orig_flags = chan->flags;
1905 chan->max_antenna_gain =
1906 min_t(int, MBI_TO_DBI(power_rule1->max_antenna_gain),
1907 MBI_TO_DBI(power_rule2->max_antenna_gain));
1908 chan->orig_mag = chan->max_antenna_gain;
1909 chan->max_reg_power =
1910 min_t(int, MBM_TO_DBM(power_rule1->max_eirp),
1911 MBM_TO_DBM(power_rule2->max_eirp));
1912 chan->max_power = chan->max_reg_power;
1913 chan->orig_mpwr = chan->max_reg_power;
1914
1915 if (chan->flags & IEEE80211_CHAN_RADAR) {
1916 chan->dfs_cac_ms = IEEE80211_DFS_MIN_CAC_TIME_MS;
1917 if (rrule1->dfs_cac_ms || rrule2->dfs_cac_ms)
1918 chan->dfs_cac_ms = max_t(unsigned int,
1919 rrule1->dfs_cac_ms,
1920 rrule2->dfs_cac_ms);
1921 }
1922
1923 return;
1924 }
1925
1926 chan->dfs_state = NL80211_DFS_USABLE;
1927 chan->dfs_state_entered = jiffies;
1928
1929 chan->beacon_found = false;
1930 chan->flags = flags | bw_flags1 | bw_flags2 |
1931 map_regdom_flags(rrule1->flags) |
1932 map_regdom_flags(rrule2->flags);
1933
1934 /* reg_rule_to_chan_bw_flags may forbids 10 and forbids 20 MHz
1935 * (otherwise no adj. rule case), recheck therefore
1936 */
1937 if (cfg80211_does_bw_fit_range(comb_range,
1938 ieee80211_channel_to_khz(chan),
1939 MHZ_TO_KHZ(10)))
1940 chan->flags &= ~IEEE80211_CHAN_NO_10MHZ;
1941 if (cfg80211_does_bw_fit_range(comb_range,
1942 ieee80211_channel_to_khz(chan),
1943 MHZ_TO_KHZ(20)))
1944 chan->flags &= ~IEEE80211_CHAN_NO_20MHZ;
1945
1946 chan->max_antenna_gain =
1947 min_t(int, chan->orig_mag,
1948 min_t(int,
1949 MBI_TO_DBI(power_rule1->max_antenna_gain),
1950 MBI_TO_DBI(power_rule2->max_antenna_gain)));
1951 chan->max_reg_power = min_t(int,
1952 MBM_TO_DBM(power_rule1->max_eirp),
1953 MBM_TO_DBM(power_rule2->max_eirp));
1954
1955 if (chan->flags & IEEE80211_CHAN_RADAR) {
1956 if (rrule1->dfs_cac_ms || rrule2->dfs_cac_ms)
1957 chan->dfs_cac_ms = max_t(unsigned int,
1958 rrule1->dfs_cac_ms,
1959 rrule2->dfs_cac_ms);
1960 else
1961 chan->dfs_cac_ms = IEEE80211_DFS_MIN_CAC_TIME_MS;
1962 }
1963
1964 if (chan->orig_mpwr) {
1965 /* Devices that use REGULATORY_COUNTRY_IE_FOLLOW_POWER
1966 * will always follow the passed country IE power settings.
1967 */
1968 if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE &&
1969 wiphy->regulatory_flags & REGULATORY_COUNTRY_IE_FOLLOW_POWER)
1970 chan->max_power = chan->max_reg_power;
1971 else
1972 chan->max_power = min(chan->orig_mpwr,
1973 chan->max_reg_power);
1974 } else {
1975 chan->max_power = chan->max_reg_power;
1976 }
1977}
1978
7c9ff7e2
MT		 1979/* Note that right now we assume the desired channel bandwidth
1980 * is always 20 MHz for each individual channel (HT40 uses 20 MHz
1981 * per channel, the primary and the extension channel).
1982 */
1983static void handle_channel(struct wiphy *wiphy,
1984 enum nl80211_reg_initiator initiator,
1985 struct ieee80211_channel *chan)
1986{
12adee3c 1987 const u32 orig_chan_freq = ieee80211_channel_to_khz(chan);
7c9ff7e2 1988 struct regulatory_request *lr = get_last_request();
12adee3c
MT		 1989 struct wiphy *request_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx);
1990 const struct ieee80211_reg_rule *rrule = NULL;
1991 const struct ieee80211_reg_rule *rrule1 = NULL;
1992 const struct ieee80211_reg_rule *rrule2 = NULL;
1993
1994 u32 flags = chan->orig_flags;
1995
1996 rrule = freq_reg_info(wiphy, orig_chan_freq);
1997 if (IS_ERR(rrule)) {
1998 /* check for adjacent match, therefore get rules for
1999 * chan - 20 MHz and chan + 20 MHz and test
2000 * if reg rules are adjacent
2001 */
2002 rrule1 = freq_reg_info(wiphy,
2003 orig_chan_freq - MHZ_TO_KHZ(20));
2004 rrule2 = freq_reg_info(wiphy,
2005 orig_chan_freq + MHZ_TO_KHZ(20));
2006 if (!IS_ERR(rrule1) && !IS_ERR(rrule2)) {
2007 struct ieee80211_freq_range comb_range;
2008
2009 if (rrule1->freq_range.end_freq_khz !=
2010 rrule2->freq_range.start_freq_khz)
2011 goto disable_chan;
2012
2013 comb_range.start_freq_khz =
2014 rrule1->freq_range.start_freq_khz;
2015 comb_range.end_freq_khz =
2016 rrule2->freq_range.end_freq_khz;
2017 comb_range.max_bandwidth_khz =
2018 min_t(u32,
2019 rrule1->freq_range.max_bandwidth_khz,
2020 rrule2->freq_range.max_bandwidth_khz);
2021
2022 if (!cfg80211_does_bw_fit_range(&comb_range,
2023 orig_chan_freq,
2024 MHZ_TO_KHZ(20)))
2025 goto disable_chan;
2026
2027 handle_channel_adjacent_rules(wiphy, initiator, chan,
2028 flags, lr, request_wiphy,
2029 rrule1, rrule2,
2030 &comb_range);
2031 return;
2032 }
7c9ff7e2 2033
12adee3c 2034disable_chan:
7c9ff7e2
MT		 2035 /* We will disable all channels that do not match our
2036 * received regulatory rule unless the hint is coming
2037 * from a Country IE and the Country IE had no information
2038 * about a band. The IEEE 802.11 spec allows for an AP
2039 * to send only a subset of the regulatory rules allowed,
2040 * so an AP in the US that only supports 2.4 GHz may only send
2041 * a country IE with information for the 2.4 GHz band
2042 * while 5 GHz is still supported.
2043 */
2044 if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE &&
12adee3c 2045 PTR_ERR(rrule) == -ERANGE)
7c9ff7e2
MT		 2046 return;
2047
2048 if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER &&
2049 request_wiphy && request_wiphy == wiphy &&
2050 request_wiphy->regulatory_flags & REGULATORY_STRICT_REG) {
2051 pr_debug("Disabling freq %d.%03d MHz for good\n",
2052 chan->center_freq, chan->freq_offset);
2053 chan->orig_flags |= IEEE80211_CHAN_DISABLED;
2054 chan->flags = chan->orig_flags;
2055 } else {
2056 pr_debug("Disabling freq %d.%03d MHz\n",
2057 chan->center_freq, chan->freq_offset);
2058 chan->flags |= IEEE80211_CHAN_DISABLED;
2059 }
2060 return;
2061 }
2062
2063 handle_channel_single_rule(wiphy, initiator, chan, flags, lr,
12adee3c 2064 request_wiphy, rrule);
7c9ff7e2
MT		 2065}
2066
7ca43d03 2067static void handle_band(struct wiphy *wiphy,
fdc9d7b2
JB		 2068 enum nl80211_reg_initiator initiator,
2069 struct ieee80211_supported_band *sband)
8318d78a 2070{
a92a3ce7 2071 unsigned int i;
a92a3ce7 2072
fdc9d7b2
JB		 2073 if (!sband)
2074 return;
8318d78a
JB		 2075
2076 for (i = 0; i < sband->n_channels; i++)
fdc9d7b2 2077 handle_channel(wiphy, initiator, &sband->channels[i]);
8318d78a
JB		 2078}
2079
57b5ce07
LR		 2080static bool reg_request_cell_base(struct regulatory_request *request)
2081{
2082 if (request->initiator != NL80211_REGDOM_SET_BY_USER)
2083 return false;
1a919318 2084 return request->user_reg_hint_type == NL80211_USER_REG_HINT_CELL_BASE;
57b5ce07
LR		 2085}
2086
2087bool reg_last_request_cell_base(void)
2088{
38fd2143 2089 return reg_request_cell_base(get_last_request());
57b5ce07
LR		 2090}
2091
94fc661f 2092#ifdef CONFIG_CFG80211_REG_CELLULAR_HINTS
57b5ce07 2093/* Core specific check */
2f92212b
JB		 2094static enum reg_request_treatment
2095reg_ignore_cell_hint(struct regulatory_request *pending_request)
57b5ce07 2096{
c492db37
JB		 2097 struct regulatory_request *lr = get_last_request();
2098
57b5ce07 2099 if (!reg_num_devs_support_basehint)
2f92212b 2100 return REG_REQ_IGNORE;
57b5ce07 2101
c492db37 2102 if (reg_request_cell_base(lr) &&
1a919318 2103 !regdom_changes(pending_request->alpha2))
2f92212b 2104 return REG_REQ_ALREADY_SET;
1a919318 2105
2f92212b 2106 return REG_REQ_OK;
57b5ce07
LR		 2107}
2108
2109/* Device specific check */
2110static bool reg_dev_ignore_cell_hint(struct wiphy *wiphy)
2111{
1a919318 2112 return !(wiphy->features & NL80211_FEATURE_CELL_BASE_REG_HINTS);
57b5ce07
LR		 2113}
2114#else
a515de66
JB		 2115static enum reg_request_treatment
2116reg_ignore_cell_hint(struct regulatory_request *pending_request)
57b5ce07 2117{
2f92212b 2118 return REG_REQ_IGNORE;
57b5ce07 2119}
1a919318
JB		 2120
2121static bool reg_dev_ignore_cell_hint(struct wiphy *wiphy)
57b5ce07
LR		 2122{
2123 return true;
2124}
2125#endif
2126
fa1fb9cb
LR		 2127static bool wiphy_strict_alpha2_regd(struct wiphy *wiphy)
2128{
a2f73b6c
LR		 2129 if (wiphy->regulatory_flags & REGULATORY_STRICT_REG &&
2130 !(wiphy->regulatory_flags & REGULATORY_CUSTOM_REG))
fa1fb9cb
LR		 2131 return true;
2132 return false;
2133}
57b5ce07 2134
7db90f4a
LR		 2135static bool ignore_reg_update(struct wiphy *wiphy,
2136 enum nl80211_reg_initiator initiator)
14b9815a 2137{
c492db37
JB		 2138 struct regulatory_request *lr = get_last_request();
2139
b0d7aa59
JD		 2140 if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED)
2141 return true;
2142
c492db37 2143 if (!lr) {
c799ba6e
JB		 2144 pr_debug("Ignoring regulatory request set by %s since last_request is not set\n",
2145 reg_initiator_name(initiator));
14b9815a 2146 return true;
926a0a09
LR		 2147 }
2148
7db90f4a 2149 if (initiator == NL80211_REGDOM_SET_BY_CORE &&
a2f73b6c 2150 wiphy->regulatory_flags & REGULATORY_CUSTOM_REG) {
c799ba6e
JB		 2151 pr_debug("Ignoring regulatory request set by %s since the driver uses its own custom regulatory domain\n",
2152 reg_initiator_name(initiator));
14b9815a 2153 return true;
926a0a09
LR		 2154 }
2155
fb1fc7ad
LR		 2156 /*
2157 * wiphy->regd will be set once the device has its own
2158 * desired regulatory domain set
2159 */
fa1fb9cb 2160 if (wiphy_strict_alpha2_regd(wiphy) && !wiphy->regd &&
749b527b 2161 initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE &&
c492db37 2162 !is_world_regdom(lr->alpha2)) {
c799ba6e
JB		 2163 pr_debug("Ignoring regulatory request set by %s since the driver requires its own regulatory domain to be set first\n",
2164 reg_initiator_name(initiator));
14b9815a 2165 return true;
926a0a09
LR		 2166 }
2167
c492db37 2168 if (reg_request_cell_base(lr))
57b5ce07
LR		 2169 return reg_dev_ignore_cell_hint(wiphy);
2170
14b9815a
LR		 2171 return false;
2172}
2173
3195e489
LR		 2174static bool reg_is_world_roaming(struct wiphy *wiphy)
2175{
2176 const struct ieee80211_regdomain *cr = get_cfg80211_regdom();
2177 const struct ieee80211_regdomain *wr = get_wiphy_regdom(wiphy);
2178 struct regulatory_request *lr = get_last_request();
2179
2180 if (is_world_regdom(cr->alpha2) || (wr && is_world_regdom(wr->alpha2)))
2181 return true;
2182
2183 if (lr && lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE &&
a2f73b6c 2184 wiphy->regulatory_flags & REGULATORY_CUSTOM_REG)
3195e489
LR		 2185 return true;
2186
2187 return false;
2188}
2189
1a919318 2190static void handle_reg_beacon(struct wiphy *wiphy, unsigned int chan_idx,
e38f8a7a
LR		 2191 struct reg_beacon *reg_beacon)
2192{
e38f8a7a
LR		 2193 struct ieee80211_supported_band *sband;
2194 struct ieee80211_channel *chan;
6bad8766
LR		 2195 bool channel_changed = false;
2196 struct ieee80211_channel chan_before;
e38f8a7a 2197
e38f8a7a
LR		 2198 sband = wiphy->bands[reg_beacon->chan.band];
2199 chan = &sband->channels[chan_idx];
2200
934f4c7d 2201 if (likely(!ieee80211_channel_equal(chan, &reg_beacon->chan)))
e38f8a7a
LR		 2202 return;
2203
6bad8766
LR		 2204 if (chan->beacon_found)
2205 return;
2206
2207 chan->beacon_found = true;
2208
0f500a5f
LR		 2209 if (!reg_is_world_roaming(wiphy))
2210 return;
2211
a2f73b6c 2212 if (wiphy->regulatory_flags & REGULATORY_DISABLE_BEACON_HINTS)
37184244
LR		 2213 return;
2214
a48a52b7 2215 chan_before = *chan;
6bad8766 2216
8fe02e16
LR		 2217 if (chan->flags & IEEE80211_CHAN_NO_IR) {
2218 chan->flags &= ~IEEE80211_CHAN_NO_IR;
6bad8766 2219 channel_changed = true;
e38f8a7a
LR		 2220 }
2221
6bad8766
LR		 2222 if (channel_changed)
2223 nl80211_send_beacon_hint_event(wiphy, &chan_before, chan);
e38f8a7a
LR		 2224}
2225
2226/*
2227 * Called when a scan on a wiphy finds a beacon on
2228 * new channel
2229 */
2230static void wiphy_update_new_beacon(struct wiphy *wiphy,
2231 struct reg_beacon *reg_beacon)
2232{
2233 unsigned int i;
2234 struct ieee80211_supported_band *sband;
2235
e38f8a7a
LR		 2236 if (!wiphy->bands[reg_beacon->chan.band])
2237 return;
2238
2239 sband = wiphy->bands[reg_beacon->chan.band];
2240
2241 for (i = 0; i < sband->n_channels; i++)
2242 handle_reg_beacon(wiphy, i, reg_beacon);
2243}
2244
2245/*
2246 * Called upon reg changes or a new wiphy is added
2247 */
2248static void wiphy_update_beacon_reg(struct wiphy *wiphy)
2249{
2250 unsigned int i;
2251 struct ieee80211_supported_band *sband;
2252 struct reg_beacon *reg_beacon;
2253
e38f8a7a
LR		 2254 list_for_each_entry(reg_beacon, &reg_beacon_list, list) {
2255 if (!wiphy->bands[reg_beacon->chan.band])
2256 continue;
2257 sband = wiphy->bands[reg_beacon->chan.band];
2258 for (i = 0; i < sband->n_channels; i++)
2259 handle_reg_beacon(wiphy, i, reg_beacon);
2260 }
2261}
2262
e38f8a7a
LR		 2263/* Reap the advantages of previously found beacons */
2264static void reg_process_beacons(struct wiphy *wiphy)
2265{
b1ed8ddd
LR		 2266 /*
2267 * Means we are just firing up cfg80211, so no beacons would
2268 * have been processed yet.
2269 */
2270 if (!last_request)
2271 return;
e38f8a7a
LR		 2272 wiphy_update_beacon_reg(wiphy);
2273}
2274
1a919318 2275static bool is_ht40_allowed(struct ieee80211_channel *chan)
038659e7
LR		 2276{
2277 if (!chan)
1a919318 2278 return false;
038659e7 2279 if (chan->flags & IEEE80211_CHAN_DISABLED)
1a919318 2280 return false;
038659e7 2281 /* This would happen when regulatory rules disallow HT40 completely */
55b183ad
FF		 2282 if ((chan->flags & IEEE80211_CHAN_NO_HT40) == IEEE80211_CHAN_NO_HT40)
2283 return false;
2284 return true;
038659e7
LR		 2285}
2286
2287static void reg_process_ht_flags_channel(struct wiphy *wiphy,
fdc9d7b2 2288 struct ieee80211_channel *channel)
038659e7 2289{
fdc9d7b2 2290 struct ieee80211_supported_band *sband = wiphy->bands[channel->band];
038659e7 2291 struct ieee80211_channel *channel_before = NULL, *channel_after = NULL;
4e0854a7 2292 const struct ieee80211_regdomain *regd;
038659e7 2293 unsigned int i;
4e0854a7 2294 u32 flags;
038659e7 2295
1a919318 2296 if (!is_ht40_allowed(channel)) {
038659e7
LR		 2297 channel->flags |= IEEE80211_CHAN_NO_HT40;
2298 return;
2299 }
2300
2301 /*
2302 * We need to ensure the extension channels exist to
2303 * be able to use HT40- or HT40+, this finds them (or not)
2304 */
2305 for (i = 0; i < sband->n_channels; i++) {
2306 struct ieee80211_channel *c = &sband->channels[i];
1a919318 2307
038659e7
LR		 2308 if (c->center_freq == (channel->center_freq - 20))
2309 channel_before = c;
2310 if (c->center_freq == (channel->center_freq + 20))
2311 channel_after = c;
2312 }
2313
4e0854a7
EG		 2314 flags = 0;
2315 regd = get_wiphy_regdom(wiphy);
2316 if (regd) {
2317 const struct ieee80211_reg_rule *reg_rule =
2318 freq_reg_info_regd(MHZ_TO_KHZ(channel->center_freq),
2319 regd, MHZ_TO_KHZ(20));
2320
2321 if (!IS_ERR(reg_rule))
2322 flags = reg_rule->flags;
2323 }
2324
038659e7
LR		 2325 /*
2326 * Please note that this assumes target bandwidth is 20 MHz,
2327 * if that ever changes we also need to change the below logic
2328 * to include that as well.
2329 */
4e0854a7
EG		 2330 if (!is_ht40_allowed(channel_before) ||
2331 flags & NL80211_RRF_NO_HT40MINUS)
689da1b3 2332 channel->flags |= IEEE80211_CHAN_NO_HT40MINUS;
038659e7 2333 else
689da1b3 2334 channel->flags &= ~IEEE80211_CHAN_NO_HT40MINUS;
038659e7 2335
4e0854a7
EG		 2336 if (!is_ht40_allowed(channel_after) ||
2337 flags & NL80211_RRF_NO_HT40PLUS)
689da1b3 2338 channel->flags |= IEEE80211_CHAN_NO_HT40PLUS;
038659e7 2339 else
689da1b3 2340 channel->flags &= ~IEEE80211_CHAN_NO_HT40PLUS;
038659e7
LR		 2341}
2342
2343static void reg_process_ht_flags_band(struct wiphy *wiphy,
fdc9d7b2 2344 struct ieee80211_supported_band *sband)
038659e7
LR		 2345{
2346 unsigned int i;
038659e7 2347
fdc9d7b2
JB		 2348 if (!sband)
2349 return;
038659e7
LR		 2350
2351 for (i = 0; i < sband->n_channels; i++)
fdc9d7b2 2352 reg_process_ht_flags_channel(wiphy, &sband->channels[i]);
038659e7
LR		 2353}
2354
2355static void reg_process_ht_flags(struct wiphy *wiphy)
2356{
57fbcce3 2357 enum nl80211_band band;
038659e7
LR		 2358
2359 if (!wiphy)
2360 return;
2361
57fbcce3 2362 for (band = 0; band < NUM_NL80211_BANDS; band++)
fdc9d7b2 2363 reg_process_ht_flags_band(wiphy, wiphy->bands[band]);
038659e7
LR		 2364}
2365
0e3802db
LR		 2366static void reg_call_notifier(struct wiphy *wiphy,
2367 struct regulatory_request *request)
2368{
2369 if (wiphy->reg_notifier)
2370 wiphy->reg_notifier(wiphy, request);
2371}
2372
ad932f04
AN		 2373static bool reg_wdev_chan_valid(struct wiphy *wiphy, struct wireless_dev *wdev)
2374{
f43e5210 2375 struct cfg80211_chan_def chandef = {};
ad932f04 2376 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
20658702 2377 enum nl80211_iftype iftype;
e08ebd6d 2378 bool ret;
7b0a0e3c 2379 int link;
ad932f04
AN		 2380
2381 wdev_lock(wdev);
20658702 2382 iftype = wdev->iftype;
ad932f04 2383
20658702 2384 /* make sure the interface is active */
ad932f04 2385 if (!wdev->netdev || !netif_running(wdev->netdev))
20658702 2386 goto wdev_inactive_unlock;
ad932f04 2387
7b0a0e3c
JB		 2388 for (link = 0; link < ARRAY_SIZE(wdev->links); link++) {
2389 struct ieee80211_channel *chan;
ad932f04 2390
7b0a0e3c
JB		 2391 if (!wdev->valid_links && link > 0)
2392 break;
2393 if (!(wdev->valid_links & BIT(link)))
2394 continue;
2395 switch (iftype) {
2396 case NL80211_IFTYPE_AP:
2397 case NL80211_IFTYPE_P2P_GO:
bc185761
ST		 2398 if (!wdev->links[link].ap.beacon_interval)
2399 continue;
2400 chandef = wdev->links[link].ap.chandef;
2401 break;
7b0a0e3c
JB		 2402 case NL80211_IFTYPE_MESH_POINT:
2403 if (!wdev->u.mesh.beacon_interval)
2404 continue;
2405 chandef = wdev->u.mesh.chandef;
2406 break;
2407 case NL80211_IFTYPE_ADHOC:
2408 if (!wdev->u.ibss.ssid_len)
2409 continue;
2410 chandef = wdev->u.ibss.chandef;
2411 break;
2412 case NL80211_IFTYPE_STATION:
2413 case NL80211_IFTYPE_P2P_CLIENT:
2414 /* Maybe we could consider disabling that link only? */
2415 if (!wdev->links[link].client.current_bss)
2416 continue;
20658702 2417
7b0a0e3c
JB		 2418 chan = wdev->links[link].client.current_bss->pub.channel;
2419 if (!chan)
2420 continue;
e08ebd6d 2421
7b0a0e3c
JB		 2422 if (!rdev->ops->get_channel ||
2423 rdev_get_channel(rdev, wdev, link, &chandef))
2424 cfg80211_chandef_create(&chandef, chan,
2425 NL80211_CHAN_NO_HT);
2426 break;
2427 case NL80211_IFTYPE_MONITOR:
2428 case NL80211_IFTYPE_AP_VLAN:
2429 case NL80211_IFTYPE_P2P_DEVICE:
2430 /* no enforcement required */
2431 break;
2432 default:
2433 /* others not implemented for now */
2434 WARN_ON(1);
2435 break;
2436 }
2437
2438 wdev_unlock(wdev);
2439
2440 switch (iftype) {
2441 case NL80211_IFTYPE_AP:
2442 case NL80211_IFTYPE_P2P_GO:
2443 case NL80211_IFTYPE_ADHOC:
2444 case NL80211_IFTYPE_MESH_POINT:
2445 wiphy_lock(wiphy);
2446 ret = cfg80211_reg_can_beacon_relax(wiphy, &chandef,
2447 iftype);
2448 wiphy_unlock(wiphy);
2449
2450 if (!ret)
2451 return ret;
2452 break;
2453 case NL80211_IFTYPE_STATION:
2454 case NL80211_IFTYPE_P2P_CLIENT:
2455 ret = cfg80211_chandef_usable(wiphy, &chandef,
2456 IEEE80211_CHAN_DISABLED);
2457 if (!ret)
2458 return ret;
2459 break;
2460 default:
2461 break;
2462 }
2463
2464 wdev_lock(wdev);
20658702
AN		 2465 }
2466
7b0a0e3c
JB		 2467 wdev_unlock(wdev);
2468
20658702
AN		 2469 return true;
2470
2471wdev_inactive_unlock:
2472 wdev_unlock(wdev);
2473 return true;
ad932f04
AN		 2474}
2475
2476static void reg_leave_invalid_chans(struct wiphy *wiphy)
2477{
2478 struct wireless_dev *wdev;
2479 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
2480
2481 ASSERT_RTNL();
2482
53873f13 2483 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list)
ad932f04
AN		 2484 if (!reg_wdev_chan_valid(wiphy, wdev))
2485 cfg80211_leave(rdev, wdev);
2486}
2487
2488static void reg_check_chans_work(struct work_struct *work)
2489{
2490 struct cfg80211_registered_device *rdev;
2491
c799ba6e 2492 pr_debug("Verifying active interfaces after reg change\n");
ad932f04
AN		 2493 rtnl_lock();
2494
2495 list_for_each_entry(rdev, &cfg80211_rdev_list, list)
2496 if (!(rdev->wiphy.regulatory_flags &
2497 REGULATORY_IGNORE_STALE_KICKOFF))
2498 reg_leave_invalid_chans(&rdev->wiphy);
2499
2500 rtnl_unlock();
2501}
2502
2503static void reg_check_channels(void)
2504{
2505 /*
2506 * Give usermode a chance to do something nicer (move to another
2507 * channel, orderly disconnection), before forcing a disconnection.
2508 */
2509 mod_delayed_work(system_power_efficient_wq,
2510 &reg_check_chans,
2511 msecs_to_jiffies(REG_ENFORCE_GRACE_MS));
2512}
2513
eac03e38
SN		 2514static void wiphy_update_regulatory(struct wiphy *wiphy,
2515 enum nl80211_reg_initiator initiator)
b2e1b302 2516{
57fbcce3 2517 enum nl80211_band band;
c492db37 2518 struct regulatory_request *lr = get_last_request();
eac03e38 2519
0e3802db
LR		 2520 if (ignore_reg_update(wiphy, initiator)) {
2521 /*
2522 * Regulatory updates set by CORE are ignored for custom
2523 * regulatory cards. Let us notify the changes to the driver,
2524 * as some drivers used this to restore its orig_* reg domain.
2525 */
2526 if (initiator == NL80211_REGDOM_SET_BY_CORE &&
e31f6456
AS		 2527 wiphy->regulatory_flags & REGULATORY_CUSTOM_REG &&
2528 !(wiphy->regulatory_flags &
2529 REGULATORY_WIPHY_SELF_MANAGED))
0e3802db 2530 reg_call_notifier(wiphy, lr);
a203c2aa 2531 return;
0e3802db 2532 }
a203c2aa 2533
c492db37 2534 lr->dfs_region = get_cfg80211_regdom()->dfs_region;
b68e6b3b 2535
57fbcce3 2536 for (band = 0; band < NUM_NL80211_BANDS; band++)
fdc9d7b2 2537 handle_band(wiphy, initiator, wiphy->bands[band]);
a203c2aa 2538
e38f8a7a 2539 reg_process_beacons(wiphy);
038659e7 2540 reg_process_ht_flags(wiphy);
0e3802db 2541 reg_call_notifier(wiphy, lr);
b2e1b302
LR		 2542}
2543
d7549cbb
SN		 2544static void update_all_wiphy_regulatory(enum nl80211_reg_initiator initiator)
2545{
2546 struct cfg80211_registered_device *rdev;
4a38994f 2547 struct wiphy *wiphy;
d7549cbb 2548
5fe231e8 2549 ASSERT_RTNL();
458f4f9e 2550
4a38994f
RM		 2551 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
2552 wiphy = &rdev->wiphy;
2553 wiphy_update_regulatory(wiphy, initiator);
4a38994f 2554 }
ad932f04
AN		 2555
2556 reg_check_channels();
d7549cbb
SN		 2557}
2558
1fa25e41 2559static void handle_channel_custom(struct wiphy *wiphy,
fdc9d7b2 2560 struct ieee80211_channel *chan,
c4b9d655
GB		 2561 const struct ieee80211_regdomain *regd,
2562 u32 min_bw)
1fa25e41 2563{
038659e7 2564 u32 bw_flags = 0;
1fa25e41
LR		 2565 const struct ieee80211_reg_rule *reg_rule = NULL;
2566 const struct ieee80211_power_rule *power_rule = NULL;
934f4c7d 2567 u32 bw, center_freq_khz;
ac46d48e 2568
934f4c7d 2569 center_freq_khz = ieee80211_channel_to_khz(chan);
c4b9d655 2570 for (bw = MHZ_TO_KHZ(20); bw >= min_bw; bw = bw / 2) {
934f4c7d 2571 reg_rule = freq_reg_info_regd(center_freq_khz, regd, bw);
4edd5698
MM		 2572 if (!IS_ERR(reg_rule))
2573 break;
2574 }
1fa25e41 2575
a7ee7d44 2576 if (IS_ERR_OR_NULL(reg_rule)) {
934f4c7d
TP		 2577 pr_debug("Disabling freq %d.%03d MHz as custom regd has no rule that fits it\n",
2578 chan->center_freq, chan->freq_offset);
db8dfee5
AN		 2579 if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) {
2580 chan->flags |= IEEE80211_CHAN_DISABLED;
2581 } else {
2582 chan->orig_flags |= IEEE80211_CHAN_DISABLED;
2583 chan->flags = chan->orig_flags;
2584 }
1fa25e41
LR		 2585 return;
2586 }
2587
2588 power_rule = &reg_rule->power_rule;
1aeb135f 2589 bw_flags = reg_rule_to_chan_bw_flags(regd, reg_rule, chan);
1fa25e41 2590
2e18b38f 2591 chan->dfs_state_entered = jiffies;
c7ab5081
AN		 2592 chan->dfs_state = NL80211_DFS_USABLE;
2593
2594 chan->beacon_found = false;
db8dfee5
AN		 2595
2596 if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED)
2597 chan->flags = chan->orig_flags | bw_flags |
2598 map_regdom_flags(reg_rule->flags);
2599 else
2600 chan->flags |= map_regdom_flags(reg_rule->flags) | bw_flags;
2601
1fa25e41 2602 chan->max_antenna_gain = (int) MBI_TO_DBI(power_rule->max_antenna_gain);
279f0f55
FF		 2603 chan->max_reg_power = chan->max_power =
2604 (int) MBM_TO_DBM(power_rule->max_eirp);
2e18b38f
AN		 2605
2606 if (chan->flags & IEEE80211_CHAN_RADAR) {
2607 if (reg_rule->dfs_cac_ms)
2608 chan->dfs_cac_ms = reg_rule->dfs_cac_ms;
2609 else
2610 chan->dfs_cac_ms = IEEE80211_DFS_MIN_CAC_TIME_MS;
2611 }
2612
2613 chan->max_power = chan->max_reg_power;
1fa25e41
LR		 2614}
2615
fdc9d7b2
JB		 2616static void handle_band_custom(struct wiphy *wiphy,
2617 struct ieee80211_supported_band *sband,
1fa25e41
LR		 2618 const struct ieee80211_regdomain *regd)
2619{
2620 unsigned int i;
1fa25e41 2621
fdc9d7b2
JB		 2622 if (!sband)
2623 return;
1fa25e41 2624
c4b9d655
GB		 2625 /*
2626 * We currently assume that you always want at least 20 MHz,
2627 * otherwise channel 12 might get enabled if this rule is
2628 * compatible to US, which permits 2402 - 2472 MHz.
2629 */
1fa25e41 2630 for (i = 0; i < sband->n_channels; i++)
c4b9d655
GB		 2631 handle_channel_custom(wiphy, &sband->channels[i], regd,
2632 MHZ_TO_KHZ(20));
1fa25e41
LR		 2633}
2634
2635/* Used by drivers prior to wiphy registration */
2636void wiphy_apply_custom_regulatory(struct wiphy *wiphy,
2637 const struct ieee80211_regdomain *regd)
2638{
beee2469 2639 const struct ieee80211_regdomain *new_regd, *tmp;
57fbcce3 2640 enum nl80211_band band;
bbcf3f02 2641 unsigned int bands_set = 0;
ac46d48e 2642
a2f73b6c
LR		 2643 WARN(!(wiphy->regulatory_flags & REGULATORY_CUSTOM_REG),
2644 "wiphy should have REGULATORY_CUSTOM_REG\n");
2645 wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG;
222ea581 2646
57fbcce3 2647 for (band = 0; band < NUM_NL80211_BANDS; band++) {
bbcf3f02
LR		 2648 if (!wiphy->bands[band])
2649 continue;
fdc9d7b2 2650 handle_band_custom(wiphy, wiphy->bands[band], regd);
bbcf3f02 2651 bands_set++;
b2e1b302 2652 }
bbcf3f02
LR		 2653
2654 /*
2655 * no point in calling this if it won't have any effect
1a919318 2656 * on your device's supported bands.
bbcf3f02
LR		 2657 */
2658 WARN_ON(!bands_set);
beee2469
IP		 2659 new_regd = reg_copy_regd(regd);
2660 if (IS_ERR(new_regd))
2661 return;
2662
51d62f2f 2663 rtnl_lock();
a05829a7 2664 wiphy_lock(wiphy);
51d62f2f 2665
beee2469
IP		 2666 tmp = get_wiphy_regdom(wiphy);
2667 rcu_assign_pointer(wiphy->regd, new_regd);
2668 rcu_free_regdom(tmp);
51d62f2f 2669
a05829a7 2670 wiphy_unlock(wiphy);
51d62f2f 2671 rtnl_unlock();
b2e1b302 2672}
1fa25e41
LR		 2673EXPORT_SYMBOL(wiphy_apply_custom_regulatory);
2674
b2e253cf
LR		 2675static void reg_set_request_processed(void)
2676{
2677 bool need_more_processing = false;
c492db37 2678 struct regulatory_request *lr = get_last_request();
b2e253cf 2679
c492db37 2680 lr->processed = true;
b2e253cf
LR		 2681
2682 spin_lock(&reg_requests_lock);
2683 if (!list_empty(&reg_requests_list))
2684 need_more_processing = true;
2685 spin_unlock(&reg_requests_lock);
2686
b6863036 2687 cancel_crda_timeout();
a90c7a31 2688
b2e253cf
LR		 2689 if (need_more_processing)
2690 schedule_work(&reg_work);
2691}
2692
b3eb7f3f
LR		 2693/**
2694 * reg_process_hint_core - process core regulatory requests
726e6af9 2695 * @core_request: a pending core regulatory request
b3eb7f3f
LR		 2696 *
2697 * The wireless subsystem can use this function to process
2698 * a regulatory request issued by the regulatory core.
b3eb7f3f 2699 */
d34265a3
JB		 2700static enum reg_request_treatment
2701reg_process_hint_core(struct regulatory_request *core_request)
b3eb7f3f 2702{
cecbb069 2703 if (reg_query_database(core_request)) {
25b20dbd
JB		 2704 core_request->intersect = false;
2705 core_request->processed = false;
2706 reg_update_last_request(core_request);
d34265a3 2707 return REG_REQ_OK;
25b20dbd 2708 }
d34265a3
JB		 2709
2710 return REG_REQ_IGNORE;
b3eb7f3f
LR		 2711}
2712
0d97a619
LR		 2713static enum reg_request_treatment
2714__reg_process_hint_user(struct regulatory_request *user_request)
2715{
2716 struct regulatory_request *lr = get_last_request();
2717
2718 if (reg_request_cell_base(user_request))
2719 return reg_ignore_cell_hint(user_request);
2720
2721 if (reg_request_cell_base(lr))
2722 return REG_REQ_IGNORE;
2723
2724 if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE)
2725 return REG_REQ_INTERSECT;
2726 /*
2727 * If the user knows better the user should set the regdom
2728 * to their country before the IE is picked up
2729 */
2730 if (lr->initiator == NL80211_REGDOM_SET_BY_USER &&
2731 lr->intersect)
2732 return REG_REQ_IGNORE;
2733 /*
2734 * Process user requests only after previous user/driver/core
2735 * requests have been processed
2736 */
2737 if ((lr->initiator == NL80211_REGDOM_SET_BY_CORE ||
2738 lr->initiator == NL80211_REGDOM_SET_BY_DRIVER ||
2739 lr->initiator == NL80211_REGDOM_SET_BY_USER) &&
2740 regdom_changes(lr->alpha2))
2741 return REG_REQ_IGNORE;
2742
2743 if (!regdom_changes(user_request->alpha2))
2744 return REG_REQ_ALREADY_SET;
2745
2746 return REG_REQ_OK;
2747}
2748
2749/**
2750 * reg_process_hint_user - process user regulatory requests
2751 * @user_request: a pending user regulatory request
2752 *
2753 * The wireless subsystem can use this function to process
2754 * a regulatory request initiated by userspace.
0d97a619 2755 */
d34265a3
JB		 2756static enum reg_request_treatment
2757reg_process_hint_user(struct regulatory_request *user_request)
0d97a619
LR		 2758{
2759 enum reg_request_treatment treatment;
0d97a619
LR		 2760
2761 treatment = __reg_process_hint_user(user_request);
2762 if (treatment == REG_REQ_IGNORE ||
37d33114 2763 treatment == REG_REQ_ALREADY_SET)
d34265a3 2764 return REG_REQ_IGNORE;
0d97a619 2765
0d97a619
LR		 2766 user_request->intersect = treatment == REG_REQ_INTERSECT;
2767 user_request->processed = false;
5ad6ef5e 2768
cecbb069 2769 if (reg_query_database(user_request)) {
25b20dbd
JB		 2770 reg_update_last_request(user_request);
2771 user_alpha2[0] = user_request->alpha2[0];
2772 user_alpha2[1] = user_request->alpha2[1];
d34265a3 2773 return REG_REQ_OK;
25b20dbd 2774 }
d34265a3
JB		 2775
2776 return REG_REQ_IGNORE;
0d97a619
LR		 2777}
2778
21636c7f
LR		 2779static enum reg_request_treatment
2780__reg_process_hint_driver(struct regulatory_request *driver_request)
2781{
2782 struct regulatory_request *lr = get_last_request();
2783
2784 if (lr->initiator == NL80211_REGDOM_SET_BY_CORE) {
2785 if (regdom_changes(driver_request->alpha2))
2786 return REG_REQ_OK;
2787 return REG_REQ_ALREADY_SET;
2788 }
2789
2790 /*
2791 * This would happen if you unplug and plug your card
2792 * back in or if you add a new device for which the previously
2793 * loaded card also agrees on the regulatory domain.
2794 */
2795 if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER &&
2796 !regdom_changes(driver_request->alpha2))
2797 return REG_REQ_ALREADY_SET;
2798
2799 return REG_REQ_INTERSECT;
2800}
2801
2802/**
2803 * reg_process_hint_driver - process driver regulatory requests
726e6af9 2804 * @wiphy: the wireless device for the regulatory request
21636c7f
LR		 2805 * @driver_request: a pending driver regulatory request
2806 *
2807 * The wireless subsystem can use this function to process
2808 * a regulatory request issued by an 802.11 driver.
2809 *
2810 * Returns one of the different reg request treatment values.
2811 */
2812static enum reg_request_treatment
2813reg_process_hint_driver(struct wiphy *wiphy,
2814 struct regulatory_request *driver_request)
2815{
34f05f54 2816 const struct ieee80211_regdomain *regd, *tmp;
21636c7f 2817 enum reg_request_treatment treatment;
21636c7f
LR		 2818
2819 treatment = __reg_process_hint_driver(driver_request);
2820
2821 switch (treatment) {
2822 case REG_REQ_OK:
2823 break;
2824 case REG_REQ_IGNORE:
d34265a3 2825 return REG_REQ_IGNORE;
21636c7f 2826 case REG_REQ_INTERSECT:
21636c7f
LR		 2827 case REG_REQ_ALREADY_SET:
2828 regd = reg_copy_regd(get_cfg80211_regdom());
d34265a3
JB		 2829 if (IS_ERR(regd))
2830 return REG_REQ_IGNORE;
34f05f54
AN		 2831
2832 tmp = get_wiphy_regdom(wiphy);
a05829a7
JB		 2833 ASSERT_RTNL();
2834 wiphy_lock(wiphy);
21636c7f 2835 rcu_assign_pointer(wiphy->regd, regd);
a05829a7 2836 wiphy_unlock(wiphy);
34f05f54 2837 rcu_free_regdom(tmp);
21636c7f
LR		 2838 }
2839
21636c7f
LR		 2840
2841 driver_request->intersect = treatment == REG_REQ_INTERSECT;
2842 driver_request->processed = false;
5ad6ef5e 2843
21636c7f
LR		 2844 /*
2845 * Since CRDA will not be called in this case as we already
2846 * have applied the requested regulatory domain before we just
2847 * inform userspace we have processed the request
2848 */
2849 if (treatment == REG_REQ_ALREADY_SET) {
2850 nl80211_send_reg_change_event(driver_request);
25b20dbd 2851 reg_update_last_request(driver_request);
21636c7f 2852 reg_set_request_processed();
480908a7 2853 return REG_REQ_ALREADY_SET;
21636c7f
LR		 2854 }
2855
d34265a3 2856 if (reg_query_database(driver_request)) {
25b20dbd 2857 reg_update_last_request(driver_request);
d34265a3
JB		 2858 return REG_REQ_OK;
2859 }
25b20dbd 2860
d34265a3 2861 return REG_REQ_IGNORE;
21636c7f
LR		 2862}
2863
b23e7a9e
LR		 2864static enum reg_request_treatment
2865__reg_process_hint_country_ie(struct wiphy *wiphy,
2866 struct regulatory_request *country_ie_request)
2867{
2868 struct wiphy *last_wiphy = NULL;
2869 struct regulatory_request *lr = get_last_request();
2870
2871 if (reg_request_cell_base(lr)) {
2872 /* Trust a Cell base station over the AP's country IE */
2873 if (regdom_changes(country_ie_request->alpha2))
2874 return REG_REQ_IGNORE;
2875 return REG_REQ_ALREADY_SET;
2a901468
LR		 2876 } else {
2877 if (wiphy->regulatory_flags & REGULATORY_COUNTRY_IE_IGNORE)
2878 return REG_REQ_IGNORE;
b23e7a9e
LR		 2879 }
2880
b23e7a9e
LR		 2881 if (unlikely(!is_an_alpha2(country_ie_request->alpha2)))
2882 return -EINVAL;
2f1c6c57
LR		 2883
2884 if (lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE)
2885 return REG_REQ_OK;
2886
2887 last_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx);
2888
2889 if (last_wiphy != wiphy) {
b23e7a9e 2890 /*
2f1c6c57
LR		 2891 * Two cards with two APs claiming different
2892 * Country IE alpha2s. We could
2893 * intersect them, but that seems unlikely
2894 * to be correct. Reject second one for now.
b23e7a9e 2895 */
2f1c6c57
LR		 2896 if (regdom_changes(country_ie_request->alpha2))
2897 return REG_REQ_IGNORE;
b23e7a9e
LR		 2898 return REG_REQ_ALREADY_SET;
2899 }
70dcec5a
EG		 2900
2901 if (regdom_changes(country_ie_request->alpha2))
2f1c6c57
LR		 2902 return REG_REQ_OK;
2903 return REG_REQ_ALREADY_SET;
b23e7a9e
LR		 2904}
2905
d1c96a9a 2906/**
b23e7a9e 2907 * reg_process_hint_country_ie - process regulatory requests from country IEs
726e6af9 2908 * @wiphy: the wireless device for the regulatory request
b23e7a9e 2909 * @country_ie_request: a regulatory request from a country IE
d1c96a9a 2910 *
b23e7a9e
LR		 2911 * The wireless subsystem can use this function to process
2912 * a regulatory request issued by a country Information Element.
d1c96a9a 2913 *
2f92212b 2914 * Returns one of the different reg request treatment values.
d1c96a9a 2915 */
2f92212b 2916static enum reg_request_treatment
b23e7a9e
LR		 2917reg_process_hint_country_ie(struct wiphy *wiphy,
2918 struct regulatory_request *country_ie_request)
b2e1b302 2919{
2f92212b 2920 enum reg_request_treatment treatment;
761cf7ec 2921
b23e7a9e 2922 treatment = __reg_process_hint_country_ie(wiphy, country_ie_request);
9c96477d 2923
2f92212b 2924 switch (treatment) {
2f92212b
JB		 2925 case REG_REQ_OK:
2926 break;
b23e7a9e 2927 case REG_REQ_IGNORE:
d34265a3 2928 return REG_REQ_IGNORE;
b23e7a9e 2929 case REG_REQ_ALREADY_SET:
c888393b 2930 reg_free_request(country_ie_request);
480908a7 2931 return REG_REQ_ALREADY_SET;
b23e7a9e 2932 case REG_REQ_INTERSECT:
fb1fc7ad 2933 /*
b23e7a9e
LR		 2934 * This doesn't happen yet, not sure we
2935 * ever want to support it for this case.
fb1fc7ad 2936 */
8db0c433 2937 WARN_ONCE(1, "Unexpected intersection for country elements");
d34265a3 2938 return REG_REQ_IGNORE;
3e0c3ff3 2939 }
b2e1b302 2940
b23e7a9e
LR		 2941 country_ie_request->intersect = false;
2942 country_ie_request->processed = false;
5ad6ef5e 2943
d34265a3 2944 if (reg_query_database(country_ie_request)) {
25b20dbd 2945 reg_update_last_request(country_ie_request);
d34265a3
JB		 2946 return REG_REQ_OK;
2947 }
3e0c3ff3 2948
d34265a3 2949 return REG_REQ_IGNORE;
b2e1b302
LR		 2950}
2951
89766727
VT		 2952bool reg_dfs_domain_same(struct wiphy *wiphy1, struct wiphy *wiphy2)
2953{
2954 const struct ieee80211_regdomain *wiphy1_regd = NULL;
2955 const struct ieee80211_regdomain *wiphy2_regd = NULL;
2956 const struct ieee80211_regdomain *cfg80211_regd = NULL;
2957 bool dfs_domain_same;
2958
2959 rcu_read_lock();
2960
2961 cfg80211_regd = rcu_dereference(cfg80211_regdomain);
2962 wiphy1_regd = rcu_dereference(wiphy1->regd);
2963 if (!wiphy1_regd)
2964 wiphy1_regd = cfg80211_regd;
2965
2966 wiphy2_regd = rcu_dereference(wiphy2->regd);
2967 if (!wiphy2_regd)
2968 wiphy2_regd = cfg80211_regd;
2969
2970 dfs_domain_same = wiphy1_regd->dfs_region == wiphy2_regd->dfs_region;
2971
2972 rcu_read_unlock();
2973
2974 return dfs_domain_same;
2975}
2976
2977static void reg_copy_dfs_chan_state(struct ieee80211_channel *dst_chan,
2978 struct ieee80211_channel *src_chan)
2979{
2980 if (!(dst_chan->flags & IEEE80211_CHAN_RADAR) ||
2981 !(src_chan->flags & IEEE80211_CHAN_RADAR))
2982 return;
2983
2984 if (dst_chan->flags & IEEE80211_CHAN_DISABLED ||
2985 src_chan->flags & IEEE80211_CHAN_DISABLED)
2986 return;
2987
2988 if (src_chan->center_freq == dst_chan->center_freq &&
2989 dst_chan->dfs_state == NL80211_DFS_USABLE) {
2990 dst_chan->dfs_state = src_chan->dfs_state;
2991 dst_chan->dfs_state_entered = src_chan->dfs_state_entered;
2992 }
2993}
2994
2995static void wiphy_share_dfs_chan_state(struct wiphy *dst_wiphy,
2996 struct wiphy *src_wiphy)
2997{
2998 struct ieee80211_supported_band *src_sband, *dst_sband;
2999 struct ieee80211_channel *src_chan, *dst_chan;
3000 int i, j, band;
3001
3002 if (!reg_dfs_domain_same(dst_wiphy, src_wiphy))
3003 return;
3004
3005 for (band = 0; band < NUM_NL80211_BANDS; band++) {
3006 dst_sband = dst_wiphy->bands[band];
3007 src_sband = src_wiphy->bands[band];
3008 if (!dst_sband || !src_sband)
3009 continue;
3010
3011 for (i = 0; i < dst_sband->n_channels; i++) {
3012 dst_chan = &dst_sband->channels[i];
3013 for (j = 0; j < src_sband->n_channels; j++) {
3014 src_chan = &src_sband->channels[j];
3015 reg_copy_dfs_chan_state(dst_chan, src_chan);
3016 }
3017 }
3018 }
3019}
3020
3021static void wiphy_all_share_dfs_chan_state(struct wiphy *wiphy)
3022{
3023 struct cfg80211_registered_device *rdev;
3024
3025 ASSERT_RTNL();
3026
3027 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
3028 if (wiphy == &rdev->wiphy)
3029 continue;
3030 wiphy_share_dfs_chan_state(wiphy, &rdev->wiphy);
3031 }
3032}
3033
30a548c7 3034/* This processes *all* regulatory hints */
1daa37c7 3035static void reg_process_hint(struct regulatory_request *reg_request)
fe33eb39 3036{
fe33eb39 3037 struct wiphy *wiphy = NULL;
b3eb7f3f 3038 enum reg_request_treatment treatment;
1db58529 3039 enum nl80211_reg_initiator initiator = reg_request->initiator;
fe33eb39 3040
f4173766 3041 if (reg_request->wiphy_idx != WIPHY_IDX_INVALID)
fe33eb39
LR		 3042 wiphy = wiphy_idx_to_wiphy(reg_request->wiphy_idx);
3043
1db58529 3044 switch (initiator) {
b3eb7f3f 3045 case NL80211_REGDOM_SET_BY_CORE:
d34265a3
JB		 3046 treatment = reg_process_hint_core(reg_request);
3047 break;
b3eb7f3f 3048 case NL80211_REGDOM_SET_BY_USER:
d34265a3
JB		 3049 treatment = reg_process_hint_user(reg_request);
3050 break;
b3eb7f3f 3051 case NL80211_REGDOM_SET_BY_DRIVER:
772f0389
IP		 3052 if (!wiphy)
3053 goto out_free;
21636c7f
LR		 3054 treatment = reg_process_hint_driver(wiphy, reg_request);
3055 break;
b3eb7f3f 3056 case NL80211_REGDOM_SET_BY_COUNTRY_IE:
772f0389
IP		 3057 if (!wiphy)
3058 goto out_free;
b23e7a9e 3059 treatment = reg_process_hint_country_ie(wiphy, reg_request);
b3eb7f3f
LR		 3060 break;
3061 default:
1db58529 3062 WARN(1, "invalid initiator %d\n", initiator);
772f0389 3063 goto out_free;
b3eb7f3f
LR		 3064 }
3065
d34265a3
JB		 3066 if (treatment == REG_REQ_IGNORE)
3067 goto out_free;
3068
480908a7
JB		 3069 WARN(treatment != REG_REQ_OK && treatment != REG_REQ_ALREADY_SET,
3070 "unexpected treatment value %d\n", treatment);
3071
841b351c
JL		 3072 /* This is required so that the orig_* parameters are saved.
3073 * NOTE: treatment must be set for any case that reaches here!
3074 */
b23e7a9e 3075 if (treatment == REG_REQ_ALREADY_SET && wiphy &&
ad932f04 3076 wiphy->regulatory_flags & REGULATORY_STRICT_REG) {
1db58529 3077 wiphy_update_regulatory(wiphy, initiator);
89766727 3078 wiphy_all_share_dfs_chan_state(wiphy);
ad932f04
AN		 3079 reg_check_channels();
3080 }
772f0389
IP		 3081
3082 return;
3083
3084out_free:
c888393b 3085 reg_free_request(reg_request);
fe33eb39
LR		 3086}
3087
aced43ce
AS		 3088static void notify_self_managed_wiphys(struct regulatory_request *request)
3089{
3090 struct cfg80211_registered_device *rdev;
3091 struct wiphy *wiphy;
3092
3093 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
3094 wiphy = &rdev->wiphy;
3095 if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED &&
c82c06ce 3096 request->initiator == NL80211_REGDOM_SET_BY_USER)
aced43ce
AS		 3097 reg_call_notifier(wiphy, request);
3098 }
3099}
3100
b2e253cf
LR		 3101/*
3102 * Processes regulatory hints, this is all the NL80211_REGDOM_SET_BY_*
3103 * Regulatory hints come on a first come first serve basis and we
3104 * must process each one atomically.
3105 */
fe33eb39 3106static void reg_process_pending_hints(void)
b0e2880b 3107{
c492db37 3108 struct regulatory_request *reg_request, *lr;
fe33eb39 3109
c492db37 3110 lr = get_last_request();
b0e2880b 3111
b2e253cf 3112 /* When last_request->processed becomes true this will be rescheduled */
c492db37 3113 if (lr && !lr->processed) {
0d31d4db 3114 pr_debug("Pending regulatory request, waiting for it to be processed...\n");
5fe231e8 3115 return;
b2e253cf
LR		 3116 }
3117
fe33eb39 3118 spin_lock(&reg_requests_lock);
fe33eb39 3119
b2e253cf 3120 if (list_empty(&reg_requests_list)) {
d951c1dd 3121 spin_unlock(&reg_requests_lock);
5fe231e8 3122 return;
fe33eb39 3123 }
b2e253cf
LR		 3124
3125 reg_request = list_first_entry(&reg_requests_list,
3126 struct regulatory_request,
3127 list);
3128 list_del_init(&reg_request->list);
3129
fe33eb39 3130 spin_unlock(&reg_requests_lock);
b0e2880b 3131
aced43ce 3132 notify_self_managed_wiphys(reg_request);
ef51fb1d 3133
1daa37c7 3134 reg_process_hint(reg_request);
2e54a689
B		 3135
3136 lr = get_last_request();
3137
3138 spin_lock(&reg_requests_lock);
3139 if (!list_empty(&reg_requests_list) && lr && lr->processed)
3140 schedule_work(&reg_work);
3141 spin_unlock(&reg_requests_lock);
fe33eb39
LR		 3142}
3143
e38f8a7a
LR		 3144/* Processes beacon hints -- this has nothing to do with country IEs */
3145static void reg_process_pending_beacon_hints(void)
3146{
79c97e97 3147 struct cfg80211_registered_device *rdev;
e38f8a7a
LR		 3148 struct reg_beacon *pending_beacon, *tmp;
3149
e38f8a7a
LR		 3150 /* This goes through the _pending_ beacon list */
3151 spin_lock_bh(&reg_pending_beacons_lock);
3152
e38f8a7a
LR		 3153 list_for_each_entry_safe(pending_beacon, tmp,
3154 &reg_pending_beacons, list) {
e38f8a7a
LR		 3155 list_del_init(&pending_beacon->list);
3156
3157 /* Applies the beacon hint to current wiphys */
79c97e97
JB		 3158 list_for_each_entry(rdev, &cfg80211_rdev_list, list)
3159 wiphy_update_new_beacon(&rdev->wiphy, pending_beacon);
e38f8a7a
LR		 3160
3161 /* Remembers the beacon hint for new wiphys or reg changes */
3162 list_add_tail(&pending_beacon->list, &reg_beacon_list);
3163 }
3164
3165 spin_unlock_bh(&reg_pending_beacons_lock);
e38f8a7a
LR		 3166}
3167
a05829a7 3168static void reg_process_self_managed_hint(struct wiphy *wiphy)
b0d7aa59 3169{
a05829a7 3170 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
b0d7aa59
JD		 3171 const struct ieee80211_regdomain *tmp;
3172 const struct ieee80211_regdomain *regd;
57fbcce3 3173 enum nl80211_band band;
b0d7aa59
JD		 3174 struct regulatory_request request = {};
3175
a05829a7
JB		 3176 ASSERT_RTNL();
3177 lockdep_assert_wiphy(wiphy);
b0d7aa59 3178
a05829a7
JB		 3179 spin_lock(&reg_requests_lock);
3180 regd = rdev->requested_regd;
3181 rdev->requested_regd = NULL;
3182 spin_unlock(&reg_requests_lock);
b0d7aa59 3183
a05829a7
JB		 3184 if (!regd)
3185 return;
b0d7aa59 3186
a05829a7
JB		 3187 tmp = get_wiphy_regdom(wiphy);
3188 rcu_assign_pointer(wiphy->regd, regd);
3189 rcu_free_regdom(tmp);
3190
3191 for (band = 0; band < NUM_NL80211_BANDS; band++)
3192 handle_band_custom(wiphy, wiphy->bands[band], regd);
b0d7aa59 3193
a05829a7 3194 reg_process_ht_flags(wiphy);
b0d7aa59 3195
a05829a7
JB		 3196 request.wiphy_idx = get_wiphy_idx(wiphy);
3197 request.alpha2[0] = regd->alpha2[0];
3198 request.alpha2[1] = regd->alpha2[1];
3199 request.initiator = NL80211_REGDOM_SET_BY_DRIVER;
b0d7aa59 3200
a05829a7
JB		 3201 nl80211_send_wiphy_reg_change_event(&request);
3202}
b0d7aa59 3203
a05829a7
JB		 3204static void reg_process_self_managed_hints(void)
3205{
3206 struct cfg80211_registered_device *rdev;
3207
3208 ASSERT_RTNL();
3209
3210 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
3211 wiphy_lock(&rdev->wiphy);
3212 reg_process_self_managed_hint(&rdev->wiphy);
3213 wiphy_unlock(&rdev->wiphy);
b0d7aa59
JD		 3214 }
3215
3216 reg_check_channels();
3217}
3218
fe33eb39
LR		 3219static void reg_todo(struct work_struct *work)
3220{
5fe231e8 3221 rtnl_lock();
fe33eb39 3222 reg_process_pending_hints();
e38f8a7a 3223 reg_process_pending_beacon_hints();
b0d7aa59 3224 reg_process_self_managed_hints();
5fe231e8 3225 rtnl_unlock();
fe33eb39
LR		 3226}
3227
fe33eb39
LR		 3228static void queue_regulatory_request(struct regulatory_request *request)
3229{
d4f2c881
JB		 3230 request->alpha2[0] = toupper(request->alpha2[0]);
3231 request->alpha2[1] = toupper(request->alpha2[1]);
c61029c7 3232
fe33eb39
LR		 3233 spin_lock(&reg_requests_lock);
3234 list_add_tail(&request->list, &reg_requests_list);
3235 spin_unlock(&reg_requests_lock);
3236
3237 schedule_work(&reg_work);
3238}
3239
09d989d1
LR		 3240/*
3241 * Core regulatory hint -- happens during cfg80211_init()
3242 * and when we restore regulatory settings.
3243 */
ba25c141
LR		 3244static int regulatory_hint_core(const char *alpha2)
3245{
3246 struct regulatory_request *request;
3247
1a919318 3248 request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL);
ba25c141
LR		 3249 if (!request)
3250 return -ENOMEM;
3251
3252 request->alpha2[0] = alpha2[0];
3253 request->alpha2[1] = alpha2[1];
7db90f4a 3254 request->initiator = NL80211_REGDOM_SET_BY_CORE;
24f33e64 3255 request->wiphy_idx = WIPHY_IDX_INVALID;
ba25c141 3256
31e99729 3257 queue_regulatory_request(request);
5078b2e3 3258
fe33eb39 3259 return 0;
ba25c141
LR		 3260}
3261
fe33eb39 3262/* User hints */
57b5ce07
LR		 3263int regulatory_hint_user(const char *alpha2,
3264 enum nl80211_user_reg_hint_type user_reg_hint_type)
b2e1b302 3265{
fe33eb39
LR		 3266 struct regulatory_request *request;
3267
fdc9d7b2
JB		 3268 if (WARN_ON(!alpha2))
3269 return -EINVAL;
b2e1b302 3270
47caf685
JB		 3271 if (!is_world_regdom(alpha2) && !is_an_alpha2(alpha2))
3272 return -EINVAL;
3273
fe33eb39
LR		 3274 request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL);
3275 if (!request)
3276 return -ENOMEM;
3277
f4173766 3278 request->wiphy_idx = WIPHY_IDX_INVALID;
fe33eb39
LR		 3279 request->alpha2[0] = alpha2[0];
3280 request->alpha2[1] = alpha2[1];
e12822e1 3281 request->initiator = NL80211_REGDOM_SET_BY_USER;
57b5ce07 3282 request->user_reg_hint_type = user_reg_hint_type;
fe33eb39 3283
c37722bd 3284 /* Allow calling CRDA again */
b6863036 3285 reset_crda_timeouts();
c37722bd 3286
fe33eb39
LR		 3287 queue_regulatory_request(request);
3288
3289 return 0;
3290}
3291
05050753 3292int regulatory_hint_indoor(bool is_indoor, u32 portid)
52616f2b 3293{
05050753 3294 spin_lock(&reg_indoor_lock);
52616f2b 3295
05050753
I		 3296 /* It is possible that more than one user space process is trying to
3297 * configure the indoor setting. To handle such cases, clear the indoor
3298 * setting in case that some process does not think that the device
3299 * is operating in an indoor environment. In addition, if a user space
3300 * process indicates that it is controlling the indoor setting, save its
3301 * portid, i.e., make it the owner.
3302 */
3303 reg_is_indoor = is_indoor;
3304 if (reg_is_indoor) {
3305 if (!reg_is_indoor_portid)
3306 reg_is_indoor_portid = portid;
3307 } else {
3308 reg_is_indoor_portid = 0;
3309 }
52616f2b 3310
05050753 3311 spin_unlock(&reg_indoor_lock);
52616f2b 3312
05050753
I		 3313 if (!is_indoor)
3314 reg_check_channels();
52616f2b
IP		 3315
3316 return 0;
3317}
3318
05050753
I		 3319void regulatory_netlink_notify(u32 portid)
3320{
3321 spin_lock(&reg_indoor_lock);
3322
3323 if (reg_is_indoor_portid != portid) {
3324 spin_unlock(&reg_indoor_lock);
3325 return;
3326 }
3327
3328 reg_is_indoor = false;
3329 reg_is_indoor_portid = 0;
3330
3331 spin_unlock(&reg_indoor_lock);
3332
3333 reg_check_channels();
3334}
3335
fe33eb39
LR		 3336/* Driver hints */
3337int regulatory_hint(struct wiphy *wiphy, const char *alpha2)
3338{
3339 struct regulatory_request *request;
3340
fdc9d7b2
JB		 3341 if (WARN_ON(!alpha2 || !wiphy))
3342 return -EINVAL;
fe33eb39 3343
4f7b9140
LR		 3344 wiphy->regulatory_flags &= ~REGULATORY_CUSTOM_REG;
3345
fe33eb39
LR		 3346 request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL);
3347 if (!request)
3348 return -ENOMEM;
3349
3350 request->wiphy_idx = get_wiphy_idx(wiphy);
3351
fe33eb39
LR		 3352 request->alpha2[0] = alpha2[0];
3353 request->alpha2[1] = alpha2[1];
7db90f4a 3354 request->initiator = NL80211_REGDOM_SET_BY_DRIVER;
fe33eb39 3355
c37722bd 3356 /* Allow calling CRDA again */
b6863036 3357 reset_crda_timeouts();
c37722bd 3358
fe33eb39
LR		 3359 queue_regulatory_request(request);
3360
3361 return 0;
b2e1b302
LR		 3362}
3363EXPORT_SYMBOL(regulatory_hint);
3364
57fbcce3 3365void regulatory_hint_country_ie(struct wiphy *wiphy, enum nl80211_band band,
789fd033 3366 const u8 *country_ie, u8 country_ie_len)
3f2355cb 3367{
3f2355cb 3368 char alpha2[2];
3f2355cb 3369 enum environment_cap env = ENVIRON_ANY;
db2424c5 3370 struct regulatory_request *request = NULL, *lr;
d335fe63 3371
3f2355cb
LR		 3372 /* IE len must be evenly divisible by 2 */
3373 if (country_ie_len & 0x01)
db2424c5 3374 return;
3f2355cb
LR		 3375
3376 if (country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
db2424c5
JB		 3377 return;
3378
3379 request = kzalloc(sizeof(*request), GFP_KERNEL);
3380 if (!request)
3381 return;
3f2355cb 3382
3f2355cb
LR		 3383 alpha2[0] = country_ie[0];
3384 alpha2[1] = country_ie[1];
3385
3386 if (country_ie[2] == 'I')
3387 env = ENVIRON_INDOOR;
3388 else if (country_ie[2] == 'O')
3389 env = ENVIRON_OUTDOOR;
3390
db2424c5
JB		 3391 rcu_read_lock();
3392 lr = get_last_request();
3393
3394 if (unlikely(!lr))
3395 goto out;
3396
fb1fc7ad 3397 /*
8b19e6ca 3398 * We will run this only upon a successful connection on cfg80211.
4b44c8bc 3399 * We leave conflict resolution to the workqueue, where can hold
5fe231e8 3400 * the RTNL.
fb1fc7ad 3401 */
c492db37
JB		 3402 if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE &&
3403 lr->wiphy_idx != WIPHY_IDX_INVALID)
4b44c8bc 3404 goto out;
3f2355cb 3405
fe33eb39 3406 request->wiphy_idx = get_wiphy_idx(wiphy);
4f366c5d
JL		 3407 request->alpha2[0] = alpha2[0];
3408 request->alpha2[1] = alpha2[1];
7db90f4a 3409 request->initiator = NL80211_REGDOM_SET_BY_COUNTRY_IE;
fe33eb39
LR		 3410 request->country_ie_env = env;
3411
c37722bd 3412 /* Allow calling CRDA again */
b6863036 3413 reset_crda_timeouts();
c37722bd 3414
fe33eb39 3415 queue_regulatory_request(request);
db2424c5 3416 request = NULL;
3f2355cb 3417out:
db2424c5
JB		 3418 kfree(request);
3419 rcu_read_unlock();
3f2355cb 3420}
b2e1b302 3421
09d989d1
LR		 3422static void restore_alpha2(char *alpha2, bool reset_user)
3423{
3424 /* indicates there is no alpha2 to consider for restoration */
3425 alpha2[0] = '9';
3426 alpha2[1] = '7';
3427
3428 /* The user setting has precedence over the module parameter */
3429 if (is_user_regdom_saved()) {
3430 /* Unless we're asked to ignore it and reset it */
3431 if (reset_user) {
c799ba6e 3432 pr_debug("Restoring regulatory settings including user preference\n");
09d989d1
LR		 3433 user_alpha2[0] = '9';
3434 user_alpha2[1] = '7';
3435
3436 /*
3437 * If we're ignoring user settings, we still need to
3438 * check the module parameter to ensure we put things
3439 * back as they were for a full restore.
3440 */
3441 if (!is_world_regdom(ieee80211_regdom)) {
c799ba6e
JB		 3442 pr_debug("Keeping preference on module parameter ieee80211_regdom: %c%c\n",
3443 ieee80211_regdom[0], ieee80211_regdom[1]);
09d989d1
LR		 3444 alpha2[0] = ieee80211_regdom[0];
3445 alpha2[1] = ieee80211_regdom[1];
3446 }
3447 } else {
c799ba6e
JB		 3448 pr_debug("Restoring regulatory settings while preserving user preference for: %c%c\n",
3449 user_alpha2[0], user_alpha2[1]);
09d989d1
LR		 3450 alpha2[0] = user_alpha2[0];
3451 alpha2[1] = user_alpha2[1];
3452 }
3453 } else if (!is_world_regdom(ieee80211_regdom)) {
c799ba6e
JB		 3454 pr_debug("Keeping preference on module parameter ieee80211_regdom: %c%c\n",
3455 ieee80211_regdom[0], ieee80211_regdom[1]);
09d989d1
LR		 3456 alpha2[0] = ieee80211_regdom[0];
3457 alpha2[1] = ieee80211_regdom[1];
3458 } else
c799ba6e 3459 pr_debug("Restoring regulatory settings\n");
09d989d1
LR		 3460}
3461
5ce543d1
RM		 3462static void restore_custom_reg_settings(struct wiphy *wiphy)
3463{
3464 struct ieee80211_supported_band *sband;
57fbcce3 3465 enum nl80211_band band;
5ce543d1
RM		 3466 struct ieee80211_channel *chan;
3467 int i;
3468
57fbcce3 3469 for (band = 0; band < NUM_NL80211_BANDS; band++) {
5ce543d1
RM		 3470 sband = wiphy->bands[band];
3471 if (!sband)
3472 continue;
3473 for (i = 0; i < sband->n_channels; i++) {
3474 chan = &sband->channels[i];
3475 chan->flags = chan->orig_flags;
3476 chan->max_antenna_gain = chan->orig_mag;
3477 chan->max_power = chan->orig_mpwr;
899852af 3478 chan->beacon_found = false;
5ce543d1
RM		 3479 }
3480 }
3481}
3482
09d989d1 3483/*
f2e30931 3484 * Restoring regulatory settings involves ignoring any
09d989d1
LR		 3485 * possibly stale country IE information and user regulatory
3486 * settings if so desired, this includes any beacon hints
3487 * learned as we could have traveled outside to another country
3488 * after disconnection. To restore regulatory settings we do
3489 * exactly what we did at bootup:
3490 *
3491 * - send a core regulatory hint
3492 * - send a user regulatory hint if applicable
3493 *
3494 * Device drivers that send a regulatory hint for a specific country
cc5a639b 3495 * keep their own regulatory domain on wiphy->regd so that does
09d989d1
LR		 3496 * not need to be remembered.
3497 */
e646a025 3498static void restore_regulatory_settings(bool reset_user, bool cached)
09d989d1
LR		 3499{
3500 char alpha2[2];
cee0bec5 3501 char world_alpha2[2];
09d989d1 3502 struct reg_beacon *reg_beacon, *btmp;
14609555 3503 LIST_HEAD(tmp_reg_req_list);
5ce543d1 3504 struct cfg80211_registered_device *rdev;
09d989d1 3505
5fe231e8
JB		 3506 ASSERT_RTNL();
3507
05050753
I		 3508 /*
3509 * Clear the indoor setting in case that it is not controlled by user
3510 * space, as otherwise there is no guarantee that the device is still
3511 * operating in an indoor environment.
3512 */
3513 spin_lock(&reg_indoor_lock);
3514 if (reg_is_indoor && !reg_is_indoor_portid) {
3515 reg_is_indoor = false;
3516 reg_check_channels();
3517 }
3518 spin_unlock(&reg_indoor_lock);
52616f2b 3519
2d319867 3520 reset_regdomains(true, &world_regdom);
09d989d1
LR		 3521 restore_alpha2(alpha2, reset_user);
3522
14609555
LR		 3523 /*
3524 * If there's any pending requests we simply
3525 * stash them to a temporary pending queue and
3526 * add then after we've restored regulatory
3527 * settings.
3528 */
3529 spin_lock(&reg_requests_lock);
eeca9fce 3530 list_splice_tail_init(&reg_requests_list, &tmp_reg_req_list);
14609555
LR		 3531 spin_unlock(&reg_requests_lock);
3532
09d989d1
LR		 3533 /* Clear beacon hints */
3534 spin_lock_bh(&reg_pending_beacons_lock);
fea9bced
JB		 3535 list_for_each_entry_safe(reg_beacon, btmp, &reg_pending_beacons, list) {
3536 list_del(&reg_beacon->list);
3537 kfree(reg_beacon);
09d989d1
LR		 3538 }
3539 spin_unlock_bh(&reg_pending_beacons_lock);
3540
fea9bced
JB		 3541 list_for_each_entry_safe(reg_beacon, btmp, &reg_beacon_list, list) {
3542 list_del(&reg_beacon->list);
3543 kfree(reg_beacon);
09d989d1
LR		 3544 }
3545
3546 /* First restore to the basic regulatory settings */
379b82f4
JB		 3547 world_alpha2[0] = cfg80211_world_regdom->alpha2[0];
3548 world_alpha2[1] = cfg80211_world_regdom->alpha2[1];
09d989d1 3549
5ce543d1 3550 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
b0d7aa59
JD		 3551 if (rdev->wiphy.regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED)
3552 continue;
a2f73b6c 3553 if (rdev->wiphy.regulatory_flags & REGULATORY_CUSTOM_REG)
5ce543d1
RM		 3554 restore_custom_reg_settings(&rdev->wiphy);
3555 }
3556
e646a025
JB		 3557 if (cached && (!is_an_alpha2(alpha2) ||
3558 !IS_ERR_OR_NULL(cfg80211_user_regdom))) {
3559 reset_regdomains(false, cfg80211_world_regdom);
3560 update_all_wiphy_regulatory(NL80211_REGDOM_SET_BY_CORE);
3561 print_regdomain(get_cfg80211_regdom());
3562 nl80211_send_reg_change_event(&core_request_world);
3563 reg_set_request_processed();
09d989d1 3564
e646a025
JB		 3565 if (is_an_alpha2(alpha2) &&
3566 !regulatory_hint_user(alpha2, NL80211_USER_REG_HINT_USER)) {
3567 struct regulatory_request *ureq;
3568
3569 spin_lock(&reg_requests_lock);
3570 ureq = list_last_entry(&reg_requests_list,
3571 struct regulatory_request,
3572 list);
3573 list_del(&ureq->list);
3574 spin_unlock(&reg_requests_lock);
3575
3576 notify_self_managed_wiphys(ureq);
3577 reg_update_last_request(ureq);
3578 set_regdom(reg_copy_regd(cfg80211_user_regdom),
3579 REGD_SOURCE_CACHED);
3580 }
3581 } else {
3582 regulatory_hint_core(world_alpha2);
3583
3584 /*
3585 * This restores the ieee80211_regdom module parameter
3586 * preference or the last user requested regulatory
3587 * settings, user regulatory settings takes precedence.
3588 */
3589 if (is_an_alpha2(alpha2))
3590 regulatory_hint_user(alpha2, NL80211_USER_REG_HINT_USER);
3591 }
09d989d1 3592
14609555 3593 spin_lock(&reg_requests_lock);
11cff96c 3594 list_splice_tail_init(&tmp_reg_req_list, &reg_requests_list);
14609555
LR		 3595 spin_unlock(&reg_requests_lock);
3596
c799ba6e 3597 pr_debug("Kicking the queue\n");
14609555
LR		 3598
3599 schedule_work(&reg_work);
3600}
09d989d1 3601
7417844b
RKS		 3602static bool is_wiphy_all_set_reg_flag(enum ieee80211_regulatory_flags flag)
3603{
3604 struct cfg80211_registered_device *rdev;
3605 struct wireless_dev *wdev;
3606
3607 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
3608 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
3609 wdev_lock(wdev);
3610 if (!(wdev->wiphy->regulatory_flags & flag)) {
3611 wdev_unlock(wdev);
3612 return false;
3613 }
3614 wdev_unlock(wdev);
3615 }
3616 }
3617
3618 return true;
3619}
3620
09d989d1
LR		 3621void regulatory_hint_disconnect(void)
3622{
7417844b
RKS		 3623 /* Restore of regulatory settings is not required when wiphy(s)
3624 * ignore IE from connected access point but clearance of beacon hints
3625 * is required when wiphy(s) supports beacon hints.
3626 */
3627 if (is_wiphy_all_set_reg_flag(REGULATORY_COUNTRY_IE_IGNORE)) {
3628 struct reg_beacon *reg_beacon, *btmp;
3629
3630 if (is_wiphy_all_set_reg_flag(REGULATORY_DISABLE_BEACON_HINTS))
3631 return;
3632
3633 spin_lock_bh(&reg_pending_beacons_lock);
3634 list_for_each_entry_safe(reg_beacon, btmp,
3635 &reg_pending_beacons, list) {
3636 list_del(&reg_beacon->list);
3637 kfree(reg_beacon);
3638 }
3639 spin_unlock_bh(&reg_pending_beacons_lock);
3640
3641 list_for_each_entry_safe(reg_beacon, btmp,
3642 &reg_beacon_list, list) {
3643 list_del(&reg_beacon->list);
3644 kfree(reg_beacon);
3645 }
3646
3647 return;
3648 }
3649
c799ba6e 3650 pr_debug("All devices are disconnected, going to restore regulatory settings\n");
e646a025 3651 restore_regulatory_settings(false, true);
09d989d1
LR		 3652}
3653
9cf0a0b4 3654static bool freq_is_chan_12_13_14(u32 freq)
e38f8a7a 3655{
57fbcce3
JB		 3656 if (freq == ieee80211_channel_to_frequency(12, NL80211_BAND_2GHZ) ||
3657 freq == ieee80211_channel_to_frequency(13, NL80211_BAND_2GHZ) ||
3658 freq == ieee80211_channel_to_frequency(14, NL80211_BAND_2GHZ))
e38f8a7a
LR		 3659 return true;
3660 return false;
3661}
3662
3ebfa6e7
LR		 3663static bool pending_reg_beacon(struct ieee80211_channel *beacon_chan)
3664{
3665 struct reg_beacon *pending_beacon;
3666
3667 list_for_each_entry(pending_beacon, &reg_pending_beacons, list)
934f4c7d
TP		 3668 if (ieee80211_channel_equal(beacon_chan,
3669 &pending_beacon->chan))
3ebfa6e7
LR		 3670 return true;
3671 return false;
3672}
3673
e38f8a7a
LR		 3674int regulatory_hint_found_beacon(struct wiphy *wiphy,
3675 struct ieee80211_channel *beacon_chan,
3676 gfp_t gfp)
3677{
3678 struct reg_beacon *reg_beacon;
3ebfa6e7 3679 bool processing;
e38f8a7a 3680
1a919318
JB		 3681 if (beacon_chan->beacon_found ||
3682 beacon_chan->flags & IEEE80211_CHAN_RADAR ||
57fbcce3 3683 (beacon_chan->band == NL80211_BAND_2GHZ &&
1a919318 3684 !freq_is_chan_12_13_14(beacon_chan->center_freq)))
e38f8a7a
LR		 3685 return 0;
3686
3ebfa6e7
LR		 3687 spin_lock_bh(&reg_pending_beacons_lock);
3688 processing = pending_reg_beacon(beacon_chan);
3689 spin_unlock_bh(&reg_pending_beacons_lock);
3690
3691 if (processing)
e38f8a7a
LR		 3692 return 0;
3693
3694 reg_beacon = kzalloc(sizeof(struct reg_beacon), gfp);
3695 if (!reg_beacon)
3696 return -ENOMEM;
3697
934f4c7d
TP		 3698 pr_debug("Found new beacon on frequency: %d.%03d MHz (Ch %d) on %s\n",
3699 beacon_chan->center_freq, beacon_chan->freq_offset,
3700 ieee80211_freq_khz_to_channel(
3701 ieee80211_channel_to_khz(beacon_chan)),
c799ba6e 3702 wiphy_name(wiphy));
4113f751 3703
e38f8a7a 3704 memcpy(&reg_beacon->chan, beacon_chan,
1a919318 3705 sizeof(struct ieee80211_channel));
e38f8a7a
LR		 3706
3707 /*
3708 * Since we can be called from BH or and non-BH context
3709 * we must use spin_lock_bh()
3710 */
3711 spin_lock_bh(&reg_pending_beacons_lock);
3712 list_add_tail(&reg_beacon->list, &reg_pending_beacons);
3713 spin_unlock_bh(&reg_pending_beacons_lock);
3714
3715 schedule_work(&reg_work);
3716
3717 return 0;
3718}
3719
a3d2eaf0 3720static void print_rd_rules(const struct ieee80211_regdomain *rd)
b2e1b302
LR		 3721{
3722 unsigned int i;
a3d2eaf0
JB		 3723 const struct ieee80211_reg_rule *reg_rule = NULL;
3724 const struct ieee80211_freq_range *freq_range = NULL;
3725 const struct ieee80211_power_rule *power_rule = NULL;
089027e5 3726 char bw[32], cac_time[32];
b2e1b302 3727
94c4fd64 3728 pr_debug(" (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp), (dfs_cac_time)\n");
b2e1b302
LR		 3729
3730 for (i = 0; i < rd->n_reg_rules; i++) {
3731 reg_rule = &rd->reg_rules[i];
3732 freq_range = &reg_rule->freq_range;
3733 power_rule = &reg_rule->power_rule;
3734
b0dfd2ea 3735 if (reg_rule->flags & NL80211_RRF_AUTO_BW)
db18d20d 3736 snprintf(bw, sizeof(bw), "%d KHz, %u KHz AUTO",
b0dfd2ea 3737 freq_range->max_bandwidth_khz,
97524820
JD		 3738 reg_get_max_bandwidth(rd, reg_rule));
3739 else
b0dfd2ea 3740 snprintf(bw, sizeof(bw), "%d KHz",
97524820
JD		 3741 freq_range->max_bandwidth_khz);
3742
089027e5
JD		 3743 if (reg_rule->flags & NL80211_RRF_DFS)
3744 scnprintf(cac_time, sizeof(cac_time), "%u s",
3745 reg_rule->dfs_cac_ms/1000);
3746 else
3747 scnprintf(cac_time, sizeof(cac_time), "N/A");
3748
3749
fb1fc7ad
LR		 3750 /*
3751 * There may not be documentation for max antenna gain
3752 * in certain regions
3753 */
b2e1b302 3754 if (power_rule->max_antenna_gain)
94c4fd64 3755 pr_debug(" (%d KHz - %d KHz @ %s), (%d mBi, %d mBm), (%s)\n",
b2e1b302
LR		 3756 freq_range->start_freq_khz,
3757 freq_range->end_freq_khz,
97524820 3758 bw,
b2e1b302 3759 power_rule->max_antenna_gain,
089027e5
JD		 3760 power_rule->max_eirp,
3761 cac_time);
b2e1b302 3762 else
94c4fd64 3763 pr_debug(" (%d KHz - %d KHz @ %s), (N/A, %d mBm), (%s)\n",
b2e1b302
LR		 3764 freq_range->start_freq_khz,
3765 freq_range->end_freq_khz,
97524820 3766 bw,
089027e5
JD		 3767 power_rule->max_eirp,
3768 cac_time);
b2e1b302
LR		 3769 }
3770}
3771
4c7d3982 3772bool reg_supported_dfs_region(enum nl80211_dfs_regions dfs_region)
8b60b078
LR		 3773{
3774 switch (dfs_region) {
3775 case NL80211_DFS_UNSET:
3776 case NL80211_DFS_FCC:
3777 case NL80211_DFS_ETSI:
3778 case NL80211_DFS_JP:
3779 return true;
3780 default:
4a22b00b 3781 pr_debug("Ignoring unknown DFS master region: %d\n", dfs_region);
8b60b078
LR		 3782 return false;
3783 }
3784}
3785
a3d2eaf0 3786static void print_regdomain(const struct ieee80211_regdomain *rd)
b2e1b302 3787{
c492db37 3788 struct regulatory_request *lr = get_last_request();
b2e1b302 3789
3f2355cb 3790 if (is_intersected_alpha2(rd->alpha2)) {
c492db37 3791 if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) {
79c97e97 3792 struct cfg80211_registered_device *rdev;
c492db37 3793 rdev = cfg80211_rdev_by_wiphy_idx(lr->wiphy_idx);
79c97e97 3794 if (rdev) {
94c4fd64 3795 pr_debug("Current regulatory domain updated by AP to: %c%c\n",
79c97e97
JB		 3796 rdev->country_ie_alpha2[0],
3797 rdev->country_ie_alpha2[1]);
3f2355cb 3798 } else
94c4fd64 3799 pr_debug("Current regulatory domain intersected:\n");
3f2355cb 3800 } else
94c4fd64 3801 pr_debug("Current regulatory domain intersected:\n");
1a919318 3802 } else if (is_world_regdom(rd->alpha2)) {
94c4fd64 3803 pr_debug("World regulatory domain updated:\n");
1a919318 3804 } else {
b2e1b302 3805 if (is_unknown_alpha2(rd->alpha2))
94c4fd64 3806 pr_debug("Regulatory domain changed to driver built-in settings (unknown country)\n");
57b5ce07 3807 else {
c492db37 3808 if (reg_request_cell_base(lr))
94c4fd64 3809 pr_debug("Regulatory domain changed to country: %c%c by Cell Station\n",
57b5ce07
LR		 3810 rd->alpha2[0], rd->alpha2[1]);
3811 else
94c4fd64 3812 pr_debug("Regulatory domain changed to country: %c%c\n",
57b5ce07
LR		 3813 rd->alpha2[0], rd->alpha2[1]);
3814 }
b2e1b302 3815 }
1a919318 3816
94c4fd64 3817 pr_debug(" DFS Master region: %s", reg_dfs_region_str(rd->dfs_region));
b2e1b302
LR		 3818 print_rd_rules(rd);
3819}
3820
2df78167 3821static void print_regdomain_info(const struct ieee80211_regdomain *rd)
b2e1b302 3822{
94c4fd64 3823 pr_debug("Regulatory domain: %c%c\n", rd->alpha2[0], rd->alpha2[1]);
b2e1b302
LR		 3824 print_rd_rules(rd);
3825}
3826
3b9e5aca
LR		 3827static int reg_set_rd_core(const struct ieee80211_regdomain *rd)
3828{
3829 if (!is_world_regdom(rd->alpha2))
3830 return -EINVAL;
3831 update_world_regdomain(rd);
3832 return 0;
3833}
3834
84721d44
LR		 3835static int reg_set_rd_user(const struct ieee80211_regdomain *rd,
3836 struct regulatory_request *user_request)
3837{
3838 const struct ieee80211_regdomain *intersected_rd = NULL;
3839
84721d44
LR		 3840 if (!regdom_changes(rd->alpha2))
3841 return -EALREADY;
3842
3843 if (!is_valid_rd(rd)) {
94c4fd64
DY		 3844 pr_err("Invalid regulatory domain detected: %c%c\n",
3845 rd->alpha2[0], rd->alpha2[1]);
84721d44
LR		 3846 print_regdomain_info(rd);
3847 return -EINVAL;
3848 }
3849
3850 if (!user_request->intersect) {
3851 reset_regdomains(false, rd);
3852 return 0;
3853 }
3854
3855 intersected_rd = regdom_intersect(rd, get_cfg80211_regdom());
3856 if (!intersected_rd)
3857 return -EINVAL;
3858
3859 kfree(rd);
3860 rd = NULL;
3861 reset_regdomains(false, intersected_rd);
3862
3863 return 0;
3864}
3865
f5fe3247
LR		 3866static int reg_set_rd_driver(const struct ieee80211_regdomain *rd,
3867 struct regulatory_request *driver_request)
b2e1b302 3868{
e9763c3c 3869 const struct ieee80211_regdomain *regd;
9c96477d 3870 const struct ieee80211_regdomain *intersected_rd = NULL;
f5fe3247 3871 const struct ieee80211_regdomain *tmp;
806a9e39 3872 struct wiphy *request_wiphy;
6913b49a 3873
f5fe3247 3874 if (is_world_regdom(rd->alpha2))
b2e1b302
LR		 3875 return -EINVAL;
3876
f5fe3247
LR		 3877 if (!regdom_changes(rd->alpha2))
3878 return -EALREADY;
b2e1b302 3879
8375af3b 3880 if (!is_valid_rd(rd)) {
94c4fd64
DY		 3881 pr_err("Invalid regulatory domain detected: %c%c\n",
3882 rd->alpha2[0], rd->alpha2[1]);
8375af3b
LR		 3883 print_regdomain_info(rd);
3884 return -EINVAL;
b2e1b302
LR		 3885 }
3886
f5fe3247 3887 request_wiphy = wiphy_idx_to_wiphy(driver_request->wiphy_idx);
922ec58c 3888 if (!request_wiphy)
de3584bd 3889 return -ENODEV;
806a9e39 3890
f5fe3247 3891 if (!driver_request->intersect) {
a05829a7
JB		 3892 ASSERT_RTNL();
3893 wiphy_lock(request_wiphy);
3894 if (request_wiphy->regd) {
3895 wiphy_unlock(request_wiphy);
558f6d32 3896 return -EALREADY;
a05829a7 3897 }
3e0c3ff3 3898
e9763c3c 3899 regd = reg_copy_regd(rd);
a05829a7
JB		 3900 if (IS_ERR(regd)) {
3901 wiphy_unlock(request_wiphy);
e9763c3c 3902 return PTR_ERR(regd);
a05829a7 3903 }
3e0c3ff3 3904
458f4f9e 3905 rcu_assign_pointer(request_wiphy->regd, regd);
a05829a7 3906 wiphy_unlock(request_wiphy);
379b82f4 3907 reset_regdomains(false, rd);
b8295acd
LR		 3908 return 0;
3909 }
3910
f5fe3247
LR		 3911 intersected_rd = regdom_intersect(rd, get_cfg80211_regdom());
3912 if (!intersected_rd)
3913 return -EINVAL;
b8295acd 3914
f5fe3247
LR		 3915 /*
3916 * We can trash what CRDA provided now.
3917 * However if a driver requested this specific regulatory
3918 * domain we keep it for its private use
3919 */
3920 tmp = get_wiphy_regdom(request_wiphy);
3921 rcu_assign_pointer(request_wiphy->regd, rd);
3922 rcu_free_regdom(tmp);
b8295acd 3923
f5fe3247 3924 rd = NULL;
b7566fc3 3925
f5fe3247 3926 reset_regdomains(false, intersected_rd);
3e0c3ff3 3927
f5fe3247
LR		 3928 return 0;
3929}
3930
01992406
LR		 3931static int reg_set_rd_country_ie(const struct ieee80211_regdomain *rd,
3932 struct regulatory_request *country_ie_request)
f5fe3247
LR		 3933{
3934 struct wiphy *request_wiphy;
b8295acd 3935
f5fe3247
LR		 3936 if (!is_alpha2_set(rd->alpha2) && !is_an_alpha2(rd->alpha2) &&
3937 !is_unknown_alpha2(rd->alpha2))
3938 return -EINVAL;
b8295acd 3939
f5fe3247
LR		 3940 /*
3941 * Lets only bother proceeding on the same alpha2 if the current
3942 * rd is non static (it means CRDA was present and was used last)
3943 * and the pending request came in from a country IE
3944 */
3945
3946 if (!is_valid_rd(rd)) {
94c4fd64
DY		 3947 pr_err("Invalid regulatory domain detected: %c%c\n",
3948 rd->alpha2[0], rd->alpha2[1]);
f5fe3247
LR		 3949 print_regdomain_info(rd);
3950 return -EINVAL;
9c96477d
LR		 3951 }
3952
01992406 3953 request_wiphy = wiphy_idx_to_wiphy(country_ie_request->wiphy_idx);
922ec58c 3954 if (!request_wiphy)
f5fe3247 3955 return -ENODEV;
b2e1b302 3956
01992406 3957 if (country_ie_request->intersect)
f5fe3247
LR		 3958 return -EINVAL;
3959
3960 reset_regdomains(false, rd);
3961 return 0;
3962}
b2e1b302 3963
fb1fc7ad
LR		 3964/*
3965 * Use this call to set the current regulatory domain. Conflicts with
b2e1b302 3966 * multiple drivers can be ironed out later. Caller must've already
458f4f9e 3967 * kmalloc'd the rd structure.
fb1fc7ad 3968 */
c37722bd
I		 3969int set_regdom(const struct ieee80211_regdomain *rd,
3970 enum ieee80211_regd_source regd_src)
b2e1b302 3971{
c492db37 3972 struct regulatory_request *lr;
092008ab 3973 bool user_reset = false;
b2e1b302
LR		 3974 int r;
3975
e646a025
JB		 3976 if (IS_ERR_OR_NULL(rd))
3977 return -ENODATA;
3978
3b9e5aca
LR		 3979 if (!reg_is_valid_request(rd->alpha2)) {
3980 kfree(rd);
3981 return -EINVAL;
3982 }
3983
c37722bd 3984 if (regd_src == REGD_SOURCE_CRDA)
b6863036 3985 reset_crda_timeouts();
c37722bd 3986
c492db37 3987 lr = get_last_request();
abc7381b 3988
b2e1b302 3989 /* Note that this doesn't update the wiphys, this is done below */
3b9e5aca
LR		 3990 switch (lr->initiator) {
3991 case NL80211_REGDOM_SET_BY_CORE:
3992 r = reg_set_rd_core(rd);
3993 break;
3994 case NL80211_REGDOM_SET_BY_USER:
e646a025 3995 cfg80211_save_user_regdom(rd);
84721d44 3996 r = reg_set_rd_user(rd, lr);
092008ab 3997 user_reset = true;
84721d44 3998 break;
3b9e5aca 3999 case NL80211_REGDOM_SET_BY_DRIVER:
f5fe3247
LR		 4000 r = reg_set_rd_driver(rd, lr);
4001 break;
3b9e5aca 4002 case NL80211_REGDOM_SET_BY_COUNTRY_IE:
01992406 4003 r = reg_set_rd_country_ie(rd, lr);
3b9e5aca
LR		 4004 break;
4005 default:
4006 WARN(1, "invalid initiator %d\n", lr->initiator);
09d11800 4007 kfree(rd);
3b9e5aca
LR		 4008 return -EINVAL;
4009 }
4010
d2372b31 4011 if (r) {
092008ab
JD		 4012 switch (r) {
4013 case -EALREADY:
95908535 4014 reg_set_request_processed();
092008ab
JD		 4015 break;
4016 default:
4017 /* Back to world regulatory in case of errors */
e646a025 4018 restore_regulatory_settings(user_reset, false);
092008ab 4019 }
95908535 4020
d2372b31 4021 kfree(rd);
38fd2143 4022 return r;
d2372b31 4023 }
b2e1b302 4024
b2e1b302 4025 /* This would make this whole thing pointless */
38fd2143
JB		 4026 if (WARN_ON(!lr->intersect && rd != get_cfg80211_regdom()))
4027 return -EINVAL;
b2e1b302
LR		 4028
4029 /* update all wiphys now with the new established regulatory domain */
c492db37 4030 update_all_wiphy_regulatory(lr->initiator);
b2e1b302 4031
458f4f9e 4032 print_regdomain(get_cfg80211_regdom());
b2e1b302 4033
c492db37 4034 nl80211_send_reg_change_event(lr);
73d54c9e 4035
b2e253cf
LR		 4036 reg_set_request_processed();
4037
38fd2143 4038 return 0;
b2e1b302
LR		 4039}
4040
2c3e861c
AN		 4041static int __regulatory_set_wiphy_regd(struct wiphy *wiphy,
4042 struct ieee80211_regdomain *rd)
b0d7aa59
JD		 4043{
4044 const struct ieee80211_regdomain *regd;
4045 const struct ieee80211_regdomain *prev_regd;
4046 struct cfg80211_registered_device *rdev;
4047
4048 if (WARN_ON(!wiphy || !rd))
4049 return -EINVAL;
4050
4051 if (WARN(!(wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED),
4052 "wiphy should have REGULATORY_WIPHY_SELF_MANAGED\n"))
4053 return -EPERM;
4054
b767ecda
JB		 4055 if (WARN(!is_valid_rd(rd),
4056 "Invalid regulatory domain detected: %c%c\n",
4057 rd->alpha2[0], rd->alpha2[1])) {
b0d7aa59
JD		 4058 print_regdomain_info(rd);
4059 return -EINVAL;
4060 }
4061
4062 regd = reg_copy_regd(rd);
4063 if (IS_ERR(regd))
4064 return PTR_ERR(regd);
4065
4066 rdev = wiphy_to_rdev(wiphy);
4067
4068 spin_lock(&reg_requests_lock);
4069 prev_regd = rdev->requested_regd;
4070 rdev->requested_regd = regd;
4071 spin_unlock(&reg_requests_lock);
4072
4073 kfree(prev_regd);
2c3e861c
AN		 4074 return 0;
4075}
4076
4077int regulatory_set_wiphy_regd(struct wiphy *wiphy,
4078 struct ieee80211_regdomain *rd)
4079{
4080 int ret = __regulatory_set_wiphy_regd(wiphy, rd);
4081
4082 if (ret)
4083 return ret;
b0d7aa59
JD		 4084
4085 schedule_work(&reg_work);
4086 return 0;
4087}
4088EXPORT_SYMBOL(regulatory_set_wiphy_regd);
4089
a05829a7
JB		 4090int regulatory_set_wiphy_regd_sync(struct wiphy *wiphy,
4091 struct ieee80211_regdomain *rd)
2c3e861c
AN		 4092{
4093 int ret;
4094
4095 ASSERT_RTNL();
4096
4097 ret = __regulatory_set_wiphy_regd(wiphy, rd);
4098 if (ret)
4099 return ret;
4100
4101 /* process the request immediately */
a05829a7
JB		 4102 reg_process_self_managed_hint(wiphy);
4103 reg_check_channels();
2c3e861c
AN		 4104 return 0;
4105}
a05829a7 4106EXPORT_SYMBOL(regulatory_set_wiphy_regd_sync);
2c3e861c 4107
57b5ce07
LR		 4108void wiphy_regulatory_register(struct wiphy *wiphy)
4109{
aced43ce 4110 struct regulatory_request *lr = get_last_request();
23df0b73 4111
aced43ce
AS		 4112 /* self-managed devices ignore beacon hints and country IE */
4113 if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) {
b0d7aa59
JD		 4114 wiphy->regulatory_flags |= REGULATORY_DISABLE_BEACON_HINTS |
4115 REGULATORY_COUNTRY_IE_IGNORE;
4116
aced43ce
AS		 4117 /*
4118 * The last request may have been received before this
4119 * registration call. Call the driver notifier if
8772eed9 4120 * initiator is USER.
aced43ce 4121 */
8772eed9 4122 if (lr->initiator == NL80211_REGDOM_SET_BY_USER)
aced43ce
AS		 4123 reg_call_notifier(wiphy, lr);
4124 }
4125
57b5ce07
LR		 4126 if (!reg_dev_ignore_cell_hint(wiphy))
4127 reg_num_devs_support_basehint++;
4128
23df0b73 4129 wiphy_update_regulatory(wiphy, lr->initiator);
89766727 4130 wiphy_all_share_dfs_chan_state(wiphy);
1b7b3ac8 4131 reg_process_self_managed_hints();
57b5ce07
LR		 4132}
4133
bfead080 4134void wiphy_regulatory_deregister(struct wiphy *wiphy)
3f2355cb 4135{
0ad8acaf 4136 struct wiphy *request_wiphy = NULL;
c492db37 4137 struct regulatory_request *lr;
761cf7ec 4138
c492db37 4139 lr = get_last_request();
abc7381b 4140
57b5ce07
LR		 4141 if (!reg_dev_ignore_cell_hint(wiphy))
4142 reg_num_devs_support_basehint--;
4143
458f4f9e 4144 rcu_free_regdom(get_wiphy_regdom(wiphy));
34dd886c 4145 RCU_INIT_POINTER(wiphy->regd, NULL);
0ef9ccdd 4146
c492db37
JB		 4147 if (lr)
4148 request_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx);
806a9e39 4149
0ef9ccdd 4150 if (!request_wiphy || request_wiphy != wiphy)
38fd2143 4151 return;
0ef9ccdd 4152
c492db37
JB		 4153 lr->wiphy_idx = WIPHY_IDX_INVALID;
4154 lr->country_ie_env = ENVIRON_ANY;
3f2355cb
LR		 4155}
4156
174e0cd2 4157/*
f89769cf
AS		 4158 * See FCC notices for UNII band definitions
4159 * 5GHz: https://www.fcc.gov/document/5-ghz-unlicensed-spectrum-unii
4160 * 6GHz: https://www.fcc.gov/document/fcc-proposes-more-spectrum-unlicensed-use-0
174e0cd2
IP		 4161 */
4162int cfg80211_get_unii(int freq)
4163{
4164 /* UNII-1 */
4165 if (freq >= 5150 && freq <= 5250)
4166 return 0;
4167
4168 /* UNII-2A */
4169 if (freq > 5250 && freq <= 5350)
4170 return 1;
4171
4172 /* UNII-2B */
4173 if (freq > 5350 && freq <= 5470)
4174 return 2;
4175
4176 /* UNII-2C */
4177 if (freq > 5470 && freq <= 5725)
4178 return 3;
4179
4180 /* UNII-3 */
4181 if (freq > 5725 && freq <= 5825)
4182 return 4;
4183
f89769cf
AS		 4184 /* UNII-5 */
4185 if (freq > 5925 && freq <= 6425)
4186 return 5;
4187
4188 /* UNII-6 */
4189 if (freq > 6425 && freq <= 6525)
4190 return 6;
4191
4192 /* UNII-7 */
4193 if (freq > 6525 && freq <= 6875)
4194 return 7;
4195
4196 /* UNII-8 */
4197 if (freq > 6875 && freq <= 7125)
4198 return 8;
4199
174e0cd2
IP		 4200 return -EINVAL;
4201}
4202
c8866e55
IP		 4203bool regulatory_indoor_allowed(void)
4204{
4205 return reg_is_indoor;
4206}
4207
b35a51c7
VT		 4208bool regulatory_pre_cac_allowed(struct wiphy *wiphy)
4209{
4210 const struct ieee80211_regdomain *regd = NULL;
4211 const struct ieee80211_regdomain *wiphy_regd = NULL;
4212 bool pre_cac_allowed = false;
4213
4214 rcu_read_lock();
4215
4216 regd = rcu_dereference(cfg80211_regdomain);
4217 wiphy_regd = rcu_dereference(wiphy->regd);
4218 if (!wiphy_regd) {
4219 if (regd->dfs_region == NL80211_DFS_ETSI)
4220 pre_cac_allowed = true;
4221
4222 rcu_read_unlock();
4223
4224 return pre_cac_allowed;
4225 }
4226
4227 if (regd->dfs_region == wiphy_regd->dfs_region &&
4228 wiphy_regd->dfs_region == NL80211_DFS_ETSI)
4229 pre_cac_allowed = true;
4230
4231 rcu_read_unlock();
4232
4233 return pre_cac_allowed;
4234}
dc0c18ed 4235EXPORT_SYMBOL(regulatory_pre_cac_allowed);
b35a51c7 4236
26ec17a1
OM		 4237static void cfg80211_check_and_end_cac(struct cfg80211_registered_device *rdev)
4238{
4239 struct wireless_dev *wdev;
4240 /* If we finished CAC or received radar, we should end any
4241 * CAC running on the same channels.
4242 * the check !cfg80211_chandef_dfs_usable contain 2 options:
4243 * either all channels are available - those the CAC_FINISHED
4244 * event has effected another wdev state, or there is a channel
4245 * in unavailable state in wdev chandef - those the RADAR_DETECTED
4246 * event has effected another wdev state.
4247 * In both cases we should end the CAC on the wdev.
4248 */
4249 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
7b0a0e3c
JB		 4250 struct cfg80211_chan_def *chandef;
4251
4252 if (!wdev->cac_started)
4253 continue;
4254
4255 /* FIXME: radar detection is tied to link 0 for now */
4256 chandef = wdev_chandef(wdev, 0);
4257 if (!chandef)
4258 continue;
4259
4260 if (!cfg80211_chandef_dfs_usable(&rdev->wiphy, chandef))
26ec17a1
OM		 4261 rdev_end_cac(rdev, wdev->netdev);
4262 }
4263}
4264
89766727
VT		 4265void regulatory_propagate_dfs_state(struct wiphy *wiphy,
4266 struct cfg80211_chan_def *chandef,
4267 enum nl80211_dfs_state dfs_state,
4268 enum nl80211_radar_event event)
4269{
4270 struct cfg80211_registered_device *rdev;
4271
4272 ASSERT_RTNL();
4273
4274 if (WARN_ON(!cfg80211_chandef_valid(chandef)))
4275 return;
4276
89766727
VT		 4277 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
4278 if (wiphy == &rdev->wiphy)
4279 continue;
4280
4281 if (!reg_dfs_domain_same(wiphy, &rdev->wiphy))
4282 continue;
4283
4284 if (!ieee80211_get_channel(&rdev->wiphy,
4285 chandef->chan->center_freq))
4286 continue;
4287
4288 cfg80211_set_dfs_state(&rdev->wiphy, chandef, dfs_state);
4289
4290 if (event == NL80211_RADAR_DETECTED ||
26ec17a1 4291 event == NL80211_RADAR_CAC_FINISHED) {
89766727 4292 cfg80211_sched_dfs_chan_update(rdev);
26ec17a1
OM		 4293 cfg80211_check_and_end_cac(rdev);
4294 }
89766727
VT		 4295
4296 nl80211_radar_notify(rdev, chandef, event, NULL, GFP_KERNEL);
4297 }
4298}
4299
d7be102f 4300static int __init regulatory_init_db(void)
b2e1b302 4301{
d7be102f 4302 int err;
734366de 4303
71e5e886
JB		 4304 /*
4305 * It's possible that - due to other bugs/issues - cfg80211
4306 * never called regulatory_init() below, or that it failed;
4307 * in that case, don't try to do any further work here as
4308 * it's doomed to lead to crashes.
4309 */
4310 if (IS_ERR_OR_NULL(reg_pdev))
4311 return -EINVAL;
4312
90a53e44 4313 err = load_builtin_regdb_keys();
833a9fd2
CZ		 4314 if (err) {
4315 platform_device_unregister(reg_pdev);
90a53e44 4316 return err;
833a9fd2 4317 }
90a53e44 4318
ae9e4b0d 4319 /* We always try to get an update for the static regdomain */
458f4f9e 4320 err = regulatory_hint_core(cfg80211_world_regdom->alpha2);
ba25c141 4321 if (err) {
09d11800
OO		 4322 if (err == -ENOMEM) {
4323 platform_device_unregister(reg_pdev);
bcf4f99b 4324 return err;
09d11800 4325 }
bcf4f99b
LR		 4326 /*
4327 * N.B. kobject_uevent_env() can fail mainly for when we're out
4328 * memory which is handled and propagated appropriately above
4329 * but it can also fail during a netlink_broadcast() or during
4330 * early boot for call_usermodehelper(). For now treat these
4331 * errors as non-fatal.
4332 */
e9c0268f 4333 pr_err("kobject_uevent_env() was unable to call CRDA during init\n");
bcf4f99b 4334 }
734366de 4335
ae9e4b0d
LR		 4336 /*
4337 * Finally, if the user set the module parameter treat it
4338 * as a user hint.
4339 */
4340 if (!is_world_regdom(ieee80211_regdom))
57b5ce07
LR		 4341 regulatory_hint_user(ieee80211_regdom,
4342 NL80211_USER_REG_HINT_USER);
ae9e4b0d 4343
b2e1b302
LR		 4344 return 0;
4345}
d7be102f
JB		 4346#ifndef MODULE
4347late_initcall(regulatory_init_db);
4348#endif
4349
4350int __init regulatory_init(void)
4351{
4352 reg_pdev = platform_device_register_simple("regulatory", 0, NULL, 0);
4353 if (IS_ERR(reg_pdev))
4354 return PTR_ERR(reg_pdev);
4355
d7be102f
JB		 4356 rcu_assign_pointer(cfg80211_regdomain, cfg80211_world_regdom);
4357
4358 user_alpha2[0] = '9';
4359 user_alpha2[1] = '7';
4360
4361#ifdef MODULE
4362 return regulatory_init_db();
4363#else
4364 return 0;
4365#endif
4366}
b2e1b302 4367
1a919318 4368void regulatory_exit(void)
b2e1b302 4369{
fe33eb39 4370 struct regulatory_request *reg_request, *tmp;
e38f8a7a 4371 struct reg_beacon *reg_beacon, *btmp;
fe33eb39
LR		 4372
4373 cancel_work_sync(&reg_work);
b6863036 4374 cancel_crda_timeout_sync();
ad932f04 4375 cancel_delayed_work_sync(&reg_check_chans);
fe33eb39 4376
9027b149 4377 /* Lock to suppress warnings */
38fd2143 4378 rtnl_lock();
379b82f4 4379 reset_regdomains(true, NULL);
38fd2143 4380 rtnl_unlock();
734366de 4381
58ebacc6 4382 dev_set_uevent_suppress(&reg_pdev->dev, true);
f6037d09 4383
b2e1b302 4384 platform_device_unregister(reg_pdev);
734366de 4385
fea9bced
JB		 4386 list_for_each_entry_safe(reg_beacon, btmp, &reg_pending_beacons, list) {
4387 list_del(&reg_beacon->list);
4388 kfree(reg_beacon);
e38f8a7a 4389 }
e38f8a7a 4390
fea9bced
JB		 4391 list_for_each_entry_safe(reg_beacon, btmp, &reg_beacon_list, list) {
4392 list_del(&reg_beacon->list);
4393 kfree(reg_beacon);
e38f8a7a
LR		 4394 }
4395
fea9bced
JB		 4396 list_for_each_entry_safe(reg_request, tmp, &reg_requests_list, list) {
4397 list_del(&reg_request->list);
4398 kfree(reg_request);
fe33eb39 4399 }
007f6c5e
JB		 4400
4401 if (!IS_ERR_OR_NULL(regdb))
4402 kfree(regdb);
e646a025
JB		 4403 if (!IS_ERR_OR_NULL(cfg80211_user_regdom))
4404 kfree(cfg80211_user_regdom);
90a53e44
JB		 4405
4406 free_regdb_keyring();
8318d78a 4407}
Linux 6.x block layer and io_uring tree(s)