18318d78aSJohannes Berg /* 28318d78aSJohannes Berg * Copyright 2002-2005, Instant802 Networks, Inc. 38318d78aSJohannes Berg * Copyright 2005-2006, Devicescape Software, Inc. 48318d78aSJohannes Berg * Copyright 2007 Johannes Berg <johannes@sipsolutions.net> 53b77d5ecSLuis R. Rodriguez * Copyright 2008-2011 Luis R. Rodriguez <mcgrof@qca.qualcomm.com> 62740f0cfSJohannes Berg * Copyright 2013-2014 Intel Mobile Communications GmbH 74e0854a7SEmmanuel Grumbach * Copyright 2017 Intel Deutschland GmbH 8e646a025SJohannes Berg * Copyright (C) 2018 - 2019 Intel Corporation 98318d78aSJohannes Berg * 103b77d5ecSLuis R. Rodriguez * Permission to use, copy, modify, and/or distribute this software for any 113b77d5ecSLuis R. Rodriguez * purpose with or without fee is hereby granted, provided that the above 123b77d5ecSLuis R. Rodriguez * copyright notice and this permission notice appear in all copies. 133b77d5ecSLuis R. Rodriguez * 143b77d5ecSLuis R. Rodriguez * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 153b77d5ecSLuis R. Rodriguez * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 163b77d5ecSLuis R. Rodriguez * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 173b77d5ecSLuis R. Rodriguez * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 183b77d5ecSLuis R. Rodriguez * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 193b77d5ecSLuis R. Rodriguez * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 203b77d5ecSLuis R. Rodriguez * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 218318d78aSJohannes Berg */ 228318d78aSJohannes Berg 233b77d5ecSLuis R. Rodriguez 24b2e1b302SLuis R. Rodriguez /** 25b2e1b302SLuis R. Rodriguez * DOC: Wireless regulatory infrastructure 268318d78aSJohannes Berg * 278318d78aSJohannes Berg * The usual implementation is for a driver to read a device EEPROM to 288318d78aSJohannes Berg * determine which regulatory domain it should be operating under, then 298318d78aSJohannes Berg * looking up the allowable channels in a driver-local table and finally 308318d78aSJohannes Berg * registering those channels in the wiphy structure. 318318d78aSJohannes Berg * 32b2e1b302SLuis R. Rodriguez * Another set of compliance enforcement is for drivers to use their 33b2e1b302SLuis R. Rodriguez * own compliance limits which can be stored on the EEPROM. The host 34b2e1b302SLuis R. Rodriguez * driver or firmware may ensure these are used. 35b2e1b302SLuis R. Rodriguez * 36b2e1b302SLuis R. Rodriguez * In addition to all this we provide an extra layer of regulatory 37b2e1b302SLuis R. Rodriguez * conformance. For drivers which do not have any regulatory 38b2e1b302SLuis R. Rodriguez * information CRDA provides the complete regulatory solution. 39b2e1b302SLuis R. Rodriguez * For others it provides a community effort on further restrictions 40b2e1b302SLuis R. Rodriguez * to enhance compliance. 41b2e1b302SLuis R. Rodriguez * 42b2e1b302SLuis R. Rodriguez * Note: When number of rules --> infinity we will not be able to 43b2e1b302SLuis R. Rodriguez * index on alpha2 any more, instead we'll probably have to 44b2e1b302SLuis R. Rodriguez * rely on some SHA1 checksum of the regdomain for example. 45b2e1b302SLuis R. Rodriguez * 468318d78aSJohannes Berg */ 47e9c0268fSJoe Perches 48e9c0268fSJoe Perches #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 49e9c0268fSJoe Perches 508318d78aSJohannes Berg #include <linux/kernel.h> 51bc3b2d7fSPaul Gortmaker #include <linux/export.h> 525a0e3ad6STejun Heo #include <linux/slab.h> 53b2e1b302SLuis R. Rodriguez #include <linux/list.h> 54c61029c7SJohn W. Linville #include <linux/ctype.h> 55b2e1b302SLuis R. Rodriguez #include <linux/nl80211.h> 56b2e1b302SLuis R. Rodriguez #include <linux/platform_device.h> 5790a53e44SJohannes Berg #include <linux/verification.h> 58d9b93842SPaul Gortmaker #include <linux/moduleparam.h> 59007f6c5eSJohannes Berg #include <linux/firmware.h> 60b2e1b302SLuis R. Rodriguez #include <net/cfg80211.h> 618318d78aSJohannes Berg #include "core.h" 62b2e1b302SLuis R. Rodriguez #include "reg.h" 63ad932f04SArik Nemtsov #include "rdev-ops.h" 6473d54c9eSLuis R. Rodriguez #include "nl80211.h" 658318d78aSJohannes Berg 66ad932f04SArik Nemtsov /* 67ad932f04SArik Nemtsov * Grace period we give before making sure all current interfaces reside on 68ad932f04SArik Nemtsov * channels allowed by the current regulatory domain. 69ad932f04SArik Nemtsov */ 70ad932f04SArik Nemtsov #define REG_ENFORCE_GRACE_MS 60000 71ad932f04SArik Nemtsov 7252616f2bSIlan Peer /** 7352616f2bSIlan Peer * enum reg_request_treatment - regulatory request treatment 7452616f2bSIlan Peer * 7552616f2bSIlan Peer * @REG_REQ_OK: continue processing the regulatory request 7652616f2bSIlan Peer * @REG_REQ_IGNORE: ignore the regulatory request 7752616f2bSIlan Peer * @REG_REQ_INTERSECT: the regulatory domain resulting from this request should 7852616f2bSIlan Peer * be intersected with the current one. 7952616f2bSIlan Peer * @REG_REQ_ALREADY_SET: the regulatory request will not change the current 8052616f2bSIlan Peer * regulatory settings, and no further processing is required. 8152616f2bSIlan Peer */ 822f92212bSJohannes Berg enum reg_request_treatment { 832f92212bSJohannes Berg REG_REQ_OK, 842f92212bSJohannes Berg REG_REQ_IGNORE, 852f92212bSJohannes Berg REG_REQ_INTERSECT, 862f92212bSJohannes Berg REG_REQ_ALREADY_SET, 872f92212bSJohannes Berg }; 882f92212bSJohannes Berg 89a042994dSLuis R. Rodriguez static struct regulatory_request core_request_world = { 90a042994dSLuis R. Rodriguez .initiator = NL80211_REGDOM_SET_BY_CORE, 91a042994dSLuis R. Rodriguez .alpha2[0] = '0', 92a042994dSLuis R. Rodriguez .alpha2[1] = '0', 93a042994dSLuis R. Rodriguez .intersect = false, 94a042994dSLuis R. Rodriguez .processed = true, 95a042994dSLuis R. Rodriguez .country_ie_env = ENVIRON_ANY, 96a042994dSLuis R. Rodriguez }; 97a042994dSLuis R. Rodriguez 9838fd2143SJohannes Berg /* 9938fd2143SJohannes Berg * Receipt of information from last regulatory request, 10038fd2143SJohannes Berg * protected by RTNL (and can be accessed with RCU protection) 10138fd2143SJohannes Berg */ 102c492db37SJohannes Berg static struct regulatory_request __rcu *last_request = 103cec3f0edSJohannes Berg (void __force __rcu *)&core_request_world; 104734366deSJohannes Berg 105007f6c5eSJohannes Berg /* To trigger userspace events and load firmware */ 106b2e1b302SLuis R. Rodriguez static struct platform_device *reg_pdev; 1078318d78aSJohannes Berg 108fb1fc7adSLuis R. Rodriguez /* 109fb1fc7adSLuis R. Rodriguez * Central wireless core regulatory domains, we only need two, 110734366deSJohannes Berg * the current one and a world regulatory domain in case we have no 111e8da2bb4SJohannes Berg * information to give us an alpha2. 11238fd2143SJohannes Berg * (protected by RTNL, can be read under RCU) 113fb1fc7adSLuis R. Rodriguez */ 114458f4f9eSJohannes Berg const struct ieee80211_regdomain __rcu *cfg80211_regdomain; 115734366deSJohannes Berg 116fb1fc7adSLuis R. Rodriguez /* 11757b5ce07SLuis R. Rodriguez * Number of devices that registered to the core 11857b5ce07SLuis R. Rodriguez * that support cellular base station regulatory hints 11938fd2143SJohannes Berg * (protected by RTNL) 12057b5ce07SLuis R. Rodriguez */ 12157b5ce07SLuis R. Rodriguez static int reg_num_devs_support_basehint; 12257b5ce07SLuis R. Rodriguez 12352616f2bSIlan Peer /* 12452616f2bSIlan Peer * State variable indicating if the platform on which the devices 12552616f2bSIlan Peer * are attached is operating in an indoor environment. The state variable 12652616f2bSIlan Peer * is relevant for all registered devices. 12752616f2bSIlan Peer */ 12852616f2bSIlan Peer static bool reg_is_indoor; 12905050753SIlan peer static spinlock_t reg_indoor_lock; 13005050753SIlan peer 13105050753SIlan peer /* Used to track the userspace process controlling the indoor setting */ 13205050753SIlan peer static u32 reg_is_indoor_portid; 13352616f2bSIlan Peer 134e646a025SJohannes Berg static void restore_regulatory_settings(bool reset_user, bool cached); 135e646a025SJohannes Berg static void print_regdomain(const struct ieee80211_regdomain *rd); 136c37722bdSIlan peer 137458f4f9eSJohannes Berg static const struct ieee80211_regdomain *get_cfg80211_regdom(void) 138458f4f9eSJohannes Berg { 1395bf16a11SJohannes Berg return rcu_dereference_rtnl(cfg80211_regdomain); 140458f4f9eSJohannes Berg } 141458f4f9eSJohannes Berg 142ad30ca2cSArik Nemtsov const struct ieee80211_regdomain *get_wiphy_regdom(struct wiphy *wiphy) 143458f4f9eSJohannes Berg { 1445bf16a11SJohannes Berg return rcu_dereference_rtnl(wiphy->regd); 145458f4f9eSJohannes Berg } 146458f4f9eSJohannes Berg 1473ef121b5SLuis R. Rodriguez static const char *reg_dfs_region_str(enum nl80211_dfs_regions dfs_region) 1483ef121b5SLuis R. Rodriguez { 1493ef121b5SLuis R. Rodriguez switch (dfs_region) { 1503ef121b5SLuis R. Rodriguez case NL80211_DFS_UNSET: 1513ef121b5SLuis R. Rodriguez return "unset"; 1523ef121b5SLuis R. Rodriguez case NL80211_DFS_FCC: 1533ef121b5SLuis R. Rodriguez return "FCC"; 1543ef121b5SLuis R. Rodriguez case NL80211_DFS_ETSI: 1553ef121b5SLuis R. Rodriguez return "ETSI"; 1563ef121b5SLuis R. Rodriguez case NL80211_DFS_JP: 1573ef121b5SLuis R. Rodriguez return "JP"; 1583ef121b5SLuis R. Rodriguez } 1593ef121b5SLuis R. Rodriguez return "Unknown"; 1603ef121b5SLuis R. Rodriguez } 1613ef121b5SLuis R. Rodriguez 1626c474799SLuis R. Rodriguez enum nl80211_dfs_regions reg_get_dfs_region(struct wiphy *wiphy) 1636c474799SLuis R. Rodriguez { 1646c474799SLuis R. Rodriguez const struct ieee80211_regdomain *regd = NULL; 1656c474799SLuis R. Rodriguez const struct ieee80211_regdomain *wiphy_regd = NULL; 1666c474799SLuis R. Rodriguez 1676c474799SLuis R. Rodriguez regd = get_cfg80211_regdom(); 1686c474799SLuis R. Rodriguez if (!wiphy) 1696c474799SLuis R. Rodriguez goto out; 1706c474799SLuis R. Rodriguez 1716c474799SLuis R. Rodriguez wiphy_regd = get_wiphy_regdom(wiphy); 1726c474799SLuis R. Rodriguez if (!wiphy_regd) 1736c474799SLuis R. Rodriguez goto out; 1746c474799SLuis R. Rodriguez 1756c474799SLuis R. Rodriguez if (wiphy_regd->dfs_region == regd->dfs_region) 1766c474799SLuis R. Rodriguez goto out; 1776c474799SLuis R. Rodriguez 178c799ba6eSJohannes Berg pr_debug("%s: device specific dfs_region (%s) disagrees with cfg80211's central dfs_region (%s)\n", 1796c474799SLuis R. Rodriguez dev_name(&wiphy->dev), 1806c474799SLuis R. Rodriguez reg_dfs_region_str(wiphy_regd->dfs_region), 1816c474799SLuis R. Rodriguez reg_dfs_region_str(regd->dfs_region)); 1826c474799SLuis R. Rodriguez 1836c474799SLuis R. Rodriguez out: 1846c474799SLuis R. Rodriguez return regd->dfs_region; 1856c474799SLuis R. Rodriguez } 1866c474799SLuis R. Rodriguez 187458f4f9eSJohannes Berg static void rcu_free_regdom(const struct ieee80211_regdomain *r) 188458f4f9eSJohannes Berg { 189458f4f9eSJohannes Berg if (!r) 190458f4f9eSJohannes Berg return; 191458f4f9eSJohannes Berg kfree_rcu((struct ieee80211_regdomain *)r, rcu_head); 192458f4f9eSJohannes Berg } 193458f4f9eSJohannes Berg 194c492db37SJohannes Berg static struct regulatory_request *get_last_request(void) 195c492db37SJohannes Berg { 19638fd2143SJohannes Berg return rcu_dereference_rtnl(last_request); 197c492db37SJohannes Berg } 198c492db37SJohannes Berg 199e38f8a7aSLuis R. Rodriguez /* Used to queue up regulatory hints */ 200fe33eb39SLuis R. Rodriguez static LIST_HEAD(reg_requests_list); 201fe33eb39SLuis R. Rodriguez static spinlock_t reg_requests_lock; 202fe33eb39SLuis R. Rodriguez 203e38f8a7aSLuis R. Rodriguez /* Used to queue up beacon hints for review */ 204e38f8a7aSLuis R. Rodriguez static LIST_HEAD(reg_pending_beacons); 205e38f8a7aSLuis R. Rodriguez static spinlock_t reg_pending_beacons_lock; 206e38f8a7aSLuis R. Rodriguez 207e38f8a7aSLuis R. Rodriguez /* Used to keep track of processed beacon hints */ 208e38f8a7aSLuis R. Rodriguez static LIST_HEAD(reg_beacon_list); 209e38f8a7aSLuis R. Rodriguez 210e38f8a7aSLuis R. Rodriguez struct reg_beacon { 211e38f8a7aSLuis R. Rodriguez struct list_head list; 212e38f8a7aSLuis R. Rodriguez struct ieee80211_channel chan; 213e38f8a7aSLuis R. Rodriguez }; 214e38f8a7aSLuis R. Rodriguez 215ad932f04SArik Nemtsov static void reg_check_chans_work(struct work_struct *work); 216ad932f04SArik Nemtsov static DECLARE_DELAYED_WORK(reg_check_chans, reg_check_chans_work); 217ad932f04SArik Nemtsov 218f333a7a2SLuis R. Rodriguez static void reg_todo(struct work_struct *work); 219f333a7a2SLuis R. Rodriguez static DECLARE_WORK(reg_work, reg_todo); 220f333a7a2SLuis R. Rodriguez 221734366deSJohannes Berg /* We keep a static world regulatory domain in case of the absence of CRDA */ 222734366deSJohannes Berg static const struct ieee80211_regdomain world_regdom = { 22328981e5eSJason Abele .n_reg_rules = 8, 224734366deSJohannes Berg .alpha2 = "00", 225734366deSJohannes Berg .reg_rules = { 22668798a62SLuis R. Rodriguez /* IEEE 802.11b/g, channels 1..11 */ 22768798a62SLuis R. Rodriguez REG_RULE(2412-10, 2462+10, 40, 6, 20, 0), 22843c771a1SJohannes Berg /* IEEE 802.11b/g, channels 12..13. */ 229c3826807SJohannes Berg REG_RULE(2467-10, 2472+10, 20, 6, 20, 230c3826807SJohannes Berg NL80211_RRF_NO_IR | NL80211_RRF_AUTO_BW), 231611b6a82SLuis R. Rodriguez /* IEEE 802.11 channel 14 - Only JP enables 232611b6a82SLuis R. Rodriguez * this and for 802.11b only */ 233611b6a82SLuis R. Rodriguez REG_RULE(2484-10, 2484+10, 20, 6, 20, 2348fe02e16SLuis R. Rodriguez NL80211_RRF_NO_IR | 235611b6a82SLuis R. Rodriguez NL80211_RRF_NO_OFDM), 2363fc71f77SLuis R. Rodriguez /* IEEE 802.11a, channel 36..48 */ 237c3826807SJohannes Berg REG_RULE(5180-10, 5240+10, 80, 6, 20, 238c3826807SJohannes Berg NL80211_RRF_NO_IR | 239c3826807SJohannes Berg NL80211_RRF_AUTO_BW), 2403fc71f77SLuis R. Rodriguez 241131a19bcSJohannes Berg /* IEEE 802.11a, channel 52..64 - DFS required */ 242c3826807SJohannes Berg REG_RULE(5260-10, 5320+10, 80, 6, 20, 2438fe02e16SLuis R. Rodriguez NL80211_RRF_NO_IR | 244c3826807SJohannes Berg NL80211_RRF_AUTO_BW | 245131a19bcSJohannes Berg NL80211_RRF_DFS), 246131a19bcSJohannes Berg 247131a19bcSJohannes Berg /* IEEE 802.11a, channel 100..144 - DFS required */ 248131a19bcSJohannes Berg REG_RULE(5500-10, 5720+10, 160, 6, 20, 2498fe02e16SLuis R. Rodriguez NL80211_RRF_NO_IR | 250131a19bcSJohannes Berg NL80211_RRF_DFS), 2513fc71f77SLuis R. Rodriguez 2523fc71f77SLuis R. Rodriguez /* IEEE 802.11a, channel 149..165 */ 2538ab9d85cSJohannes Berg REG_RULE(5745-10, 5825+10, 80, 6, 20, 2548fe02e16SLuis R. Rodriguez NL80211_RRF_NO_IR), 25590cdc6dfSVladimir Kondratiev 2568047d261SJohannes Berg /* IEEE 802.11ad (60GHz), channels 1..3 */ 25790cdc6dfSVladimir Kondratiev REG_RULE(56160+2160*1-1080, 56160+2160*3+1080, 2160, 0, 0, 0), 258734366deSJohannes Berg } 259734366deSJohannes Berg }; 260734366deSJohannes Berg 26138fd2143SJohannes Berg /* protected by RTNL */ 262a3d2eaf0SJohannes Berg static const struct ieee80211_regdomain *cfg80211_world_regdom = 263a3d2eaf0SJohannes Berg &world_regdom; 264734366deSJohannes Berg 2656ee7d330SLuis R. Rodriguez static char *ieee80211_regdom = "00"; 26609d989d1SLuis R. Rodriguez static char user_alpha2[2]; 267e646a025SJohannes Berg static const struct ieee80211_regdomain *cfg80211_user_regdom; 2686ee7d330SLuis R. Rodriguez 269734366deSJohannes Berg module_param(ieee80211_regdom, charp, 0444); 270734366deSJohannes Berg MODULE_PARM_DESC(ieee80211_regdom, "IEEE 802.11 regulatory domain code"); 271734366deSJohannes Berg 272c888393bSArik Nemtsov static void reg_free_request(struct regulatory_request *request) 2735ad6ef5eSLuis R. Rodriguez { 274d34265a3SJohannes Berg if (request == &core_request_world) 275d34265a3SJohannes Berg return; 276d34265a3SJohannes Berg 277c888393bSArik Nemtsov if (request != get_last_request()) 278c888393bSArik Nemtsov kfree(request); 279c888393bSArik Nemtsov } 280c888393bSArik Nemtsov 281c888393bSArik Nemtsov static void reg_free_last_request(void) 282c888393bSArik Nemtsov { 283c888393bSArik Nemtsov struct regulatory_request *lr = get_last_request(); 284c888393bSArik Nemtsov 2855ad6ef5eSLuis R. Rodriguez if (lr != &core_request_world && lr) 2865ad6ef5eSLuis R. Rodriguez kfree_rcu(lr, rcu_head); 2875ad6ef5eSLuis R. Rodriguez } 2885ad6ef5eSLuis R. Rodriguez 28905f1a3eaSLuis R. Rodriguez static void reg_update_last_request(struct regulatory_request *request) 29005f1a3eaSLuis R. Rodriguez { 291255e25b0SLuis R. Rodriguez struct regulatory_request *lr; 292255e25b0SLuis R. Rodriguez 293255e25b0SLuis R. Rodriguez lr = get_last_request(); 294255e25b0SLuis R. Rodriguez if (lr == request) 295255e25b0SLuis R. Rodriguez return; 296255e25b0SLuis R. Rodriguez 297c888393bSArik Nemtsov reg_free_last_request(); 29805f1a3eaSLuis R. Rodriguez rcu_assign_pointer(last_request, request); 29905f1a3eaSLuis R. Rodriguez } 30005f1a3eaSLuis R. Rodriguez 301379b82f4SJohannes Berg static void reset_regdomains(bool full_reset, 302379b82f4SJohannes Berg const struct ieee80211_regdomain *new_regdom) 303734366deSJohannes Berg { 304458f4f9eSJohannes Berg const struct ieee80211_regdomain *r; 305458f4f9eSJohannes Berg 30638fd2143SJohannes Berg ASSERT_RTNL(); 307e8da2bb4SJohannes Berg 308458f4f9eSJohannes Berg r = get_cfg80211_regdom(); 309458f4f9eSJohannes Berg 310942b25cfSJohannes Berg /* avoid freeing static information or freeing something twice */ 311458f4f9eSJohannes Berg if (r == cfg80211_world_regdom) 312458f4f9eSJohannes Berg r = NULL; 313942b25cfSJohannes Berg if (cfg80211_world_regdom == &world_regdom) 314942b25cfSJohannes Berg cfg80211_world_regdom = NULL; 315458f4f9eSJohannes Berg if (r == &world_regdom) 316458f4f9eSJohannes Berg r = NULL; 317942b25cfSJohannes Berg 318458f4f9eSJohannes Berg rcu_free_regdom(r); 319458f4f9eSJohannes Berg rcu_free_regdom(cfg80211_world_regdom); 320734366deSJohannes Berg 321a3d2eaf0SJohannes Berg cfg80211_world_regdom = &world_regdom; 322458f4f9eSJohannes Berg rcu_assign_pointer(cfg80211_regdomain, new_regdom); 323a042994dSLuis R. Rodriguez 324a042994dSLuis R. Rodriguez if (!full_reset) 325a042994dSLuis R. Rodriguez return; 326a042994dSLuis R. Rodriguez 32705f1a3eaSLuis R. Rodriguez reg_update_last_request(&core_request_world); 328734366deSJohannes Berg } 329734366deSJohannes Berg 330fb1fc7adSLuis R. Rodriguez /* 331fb1fc7adSLuis R. Rodriguez * Dynamic world regulatory domain requested by the wireless 332fb1fc7adSLuis R. Rodriguez * core upon initialization 333fb1fc7adSLuis R. Rodriguez */ 334a3d2eaf0SJohannes Berg static void update_world_regdomain(const struct ieee80211_regdomain *rd) 335734366deSJohannes Berg { 336c492db37SJohannes Berg struct regulatory_request *lr; 337734366deSJohannes Berg 338c492db37SJohannes Berg lr = get_last_request(); 339c492db37SJohannes Berg 340c492db37SJohannes Berg WARN_ON(!lr); 341e8da2bb4SJohannes Berg 342379b82f4SJohannes Berg reset_regdomains(false, rd); 343734366deSJohannes Berg 344734366deSJohannes Berg cfg80211_world_regdom = rd; 345734366deSJohannes Berg } 346734366deSJohannes Berg 347a3d2eaf0SJohannes Berg bool is_world_regdom(const char *alpha2) 348b2e1b302SLuis R. Rodriguez { 349b2e1b302SLuis R. Rodriguez if (!alpha2) 350b2e1b302SLuis R. Rodriguez return false; 3511a919318SJohannes Berg return alpha2[0] == '0' && alpha2[1] == '0'; 352b2e1b302SLuis R. Rodriguez } 353b2e1b302SLuis R. Rodriguez 354a3d2eaf0SJohannes Berg static bool is_alpha2_set(const char *alpha2) 355b2e1b302SLuis R. Rodriguez { 356b2e1b302SLuis R. Rodriguez if (!alpha2) 357b2e1b302SLuis R. Rodriguez return false; 3581a919318SJohannes Berg return alpha2[0] && alpha2[1]; 359b2e1b302SLuis R. Rodriguez } 360b2e1b302SLuis R. Rodriguez 361a3d2eaf0SJohannes Berg static bool is_unknown_alpha2(const char *alpha2) 362b2e1b302SLuis R. Rodriguez { 363b2e1b302SLuis R. Rodriguez if (!alpha2) 364b2e1b302SLuis R. Rodriguez return false; 365fb1fc7adSLuis R. Rodriguez /* 366fb1fc7adSLuis R. Rodriguez * Special case where regulatory domain was built by driver 367fb1fc7adSLuis R. Rodriguez * but a specific alpha2 cannot be determined 368fb1fc7adSLuis R. Rodriguez */ 3691a919318SJohannes Berg return alpha2[0] == '9' && alpha2[1] == '9'; 370b2e1b302SLuis R. Rodriguez } 371b2e1b302SLuis R. Rodriguez 3723f2355cbSLuis R. Rodriguez static bool is_intersected_alpha2(const char *alpha2) 3733f2355cbSLuis R. Rodriguez { 3743f2355cbSLuis R. Rodriguez if (!alpha2) 3753f2355cbSLuis R. Rodriguez return false; 376fb1fc7adSLuis R. Rodriguez /* 377fb1fc7adSLuis R. Rodriguez * Special case where regulatory domain is the 3783f2355cbSLuis R. Rodriguez * result of an intersection between two regulatory domain 379fb1fc7adSLuis R. Rodriguez * structures 380fb1fc7adSLuis R. Rodriguez */ 3811a919318SJohannes Berg return alpha2[0] == '9' && alpha2[1] == '8'; 3823f2355cbSLuis R. Rodriguez } 3833f2355cbSLuis R. Rodriguez 384a3d2eaf0SJohannes Berg static bool is_an_alpha2(const char *alpha2) 385b2e1b302SLuis R. Rodriguez { 386b2e1b302SLuis R. Rodriguez if (!alpha2) 387b2e1b302SLuis R. Rodriguez return false; 3881a919318SJohannes Berg return isalpha(alpha2[0]) && isalpha(alpha2[1]); 389b2e1b302SLuis R. Rodriguez } 390b2e1b302SLuis R. Rodriguez 391a3d2eaf0SJohannes Berg static bool alpha2_equal(const char *alpha2_x, const char *alpha2_y) 392b2e1b302SLuis R. Rodriguez { 393b2e1b302SLuis R. Rodriguez if (!alpha2_x || !alpha2_y) 394b2e1b302SLuis R. Rodriguez return false; 3951a919318SJohannes Berg return alpha2_x[0] == alpha2_y[0] && alpha2_x[1] == alpha2_y[1]; 396b2e1b302SLuis R. Rodriguez } 397b2e1b302SLuis R. Rodriguez 39869b1572bSLuis R. Rodriguez static bool regdom_changes(const char *alpha2) 399b2e1b302SLuis R. Rodriguez { 400458f4f9eSJohannes Berg const struct ieee80211_regdomain *r = get_cfg80211_regdom(); 401761cf7ecSLuis R. Rodriguez 402458f4f9eSJohannes Berg if (!r) 403b2e1b302SLuis R. Rodriguez return true; 404458f4f9eSJohannes Berg return !alpha2_equal(r->alpha2, alpha2); 405b2e1b302SLuis R. Rodriguez } 406b2e1b302SLuis R. Rodriguez 40709d989d1SLuis R. Rodriguez /* 40809d989d1SLuis R. Rodriguez * The NL80211_REGDOM_SET_BY_USER regdom alpha2 is cached, this lets 40909d989d1SLuis R. Rodriguez * you know if a valid regulatory hint with NL80211_REGDOM_SET_BY_USER 41009d989d1SLuis R. Rodriguez * has ever been issued. 41109d989d1SLuis R. Rodriguez */ 41209d989d1SLuis R. Rodriguez static bool is_user_regdom_saved(void) 41309d989d1SLuis R. Rodriguez { 41409d989d1SLuis R. Rodriguez if (user_alpha2[0] == '9' && user_alpha2[1] == '7') 41509d989d1SLuis R. Rodriguez return false; 41609d989d1SLuis R. Rodriguez 41709d989d1SLuis R. Rodriguez /* This would indicate a mistake on the design */ 4181a919318SJohannes Berg if (WARN(!is_world_regdom(user_alpha2) && !is_an_alpha2(user_alpha2), 41909d989d1SLuis R. Rodriguez "Unexpected user alpha2: %c%c\n", 4201a919318SJohannes Berg user_alpha2[0], user_alpha2[1])) 42109d989d1SLuis R. Rodriguez return false; 42209d989d1SLuis R. Rodriguez 42309d989d1SLuis R. Rodriguez return true; 42409d989d1SLuis R. Rodriguez } 42509d989d1SLuis R. Rodriguez 426e9763c3cSJohannes Berg static const struct ieee80211_regdomain * 427e9763c3cSJohannes Berg reg_copy_regd(const struct ieee80211_regdomain *src_regd) 4283b377ea9SJohn W. Linville { 4293b377ea9SJohn W. Linville struct ieee80211_regdomain *regd; 4303b377ea9SJohn W. Linville unsigned int i; 4313b377ea9SJohn W. Linville 4329f8c7136SGustavo A. R. Silva regd = kzalloc(struct_size(regd, reg_rules, src_regd->n_reg_rules), 4339f8c7136SGustavo A. R. Silva GFP_KERNEL); 4343b377ea9SJohn W. Linville if (!regd) 435e9763c3cSJohannes Berg return ERR_PTR(-ENOMEM); 4363b377ea9SJohn W. Linville 4373b377ea9SJohn W. Linville memcpy(regd, src_regd, sizeof(struct ieee80211_regdomain)); 4383b377ea9SJohn W. Linville 43938cb87eeSStanislaw Gruszka for (i = 0; i < src_regd->n_reg_rules; i++) 4403b377ea9SJohn W. Linville memcpy(®d->reg_rules[i], &src_regd->reg_rules[i], 4413b377ea9SJohn W. Linville sizeof(struct ieee80211_reg_rule)); 4423b377ea9SJohn W. Linville 443e9763c3cSJohannes Berg return regd; 4443b377ea9SJohn W. Linville } 4453b377ea9SJohn W. Linville 446e646a025SJohannes Berg static void cfg80211_save_user_regdom(const struct ieee80211_regdomain *rd) 447e646a025SJohannes Berg { 448e646a025SJohannes Berg ASSERT_RTNL(); 449e646a025SJohannes Berg 450e646a025SJohannes Berg if (!IS_ERR(cfg80211_user_regdom)) 451e646a025SJohannes Berg kfree(cfg80211_user_regdom); 452e646a025SJohannes Berg cfg80211_user_regdom = reg_copy_regd(rd); 453e646a025SJohannes Berg } 454e646a025SJohannes Berg 455c7d319e5SJohannes Berg struct reg_regdb_apply_request { 4563b377ea9SJohn W. Linville struct list_head list; 457c7d319e5SJohannes Berg const struct ieee80211_regdomain *regdom; 4583b377ea9SJohn W. Linville }; 4593b377ea9SJohn W. Linville 460c7d319e5SJohannes Berg static LIST_HEAD(reg_regdb_apply_list); 461c7d319e5SJohannes Berg static DEFINE_MUTEX(reg_regdb_apply_mutex); 4623b377ea9SJohn W. Linville 463c7d319e5SJohannes Berg static void reg_regdb_apply(struct work_struct *work) 4643b377ea9SJohn W. Linville { 465c7d319e5SJohannes Berg struct reg_regdb_apply_request *request; 466a85d0d7fSLuis R. Rodriguez 4675fe231e8SJohannes Berg rtnl_lock(); 4683b377ea9SJohn W. Linville 469c7d319e5SJohannes Berg mutex_lock(®_regdb_apply_mutex); 470c7d319e5SJohannes Berg while (!list_empty(®_regdb_apply_list)) { 471c7d319e5SJohannes Berg request = list_first_entry(®_regdb_apply_list, 472c7d319e5SJohannes Berg struct reg_regdb_apply_request, 4733b377ea9SJohn W. Linville list); 4743b377ea9SJohn W. Linville list_del(&request->list); 4753b377ea9SJohn W. Linville 476c7d319e5SJohannes Berg set_regdom(request->regdom, REGD_SOURCE_INTERNAL_DB); 4773b377ea9SJohn W. Linville kfree(request); 4783b377ea9SJohn W. Linville } 479c7d319e5SJohannes Berg mutex_unlock(®_regdb_apply_mutex); 480a85d0d7fSLuis R. Rodriguez 4815fe231e8SJohannes Berg rtnl_unlock(); 4823b377ea9SJohn W. Linville } 4833b377ea9SJohn W. Linville 484c7d319e5SJohannes Berg static DECLARE_WORK(reg_regdb_work, reg_regdb_apply); 4853b377ea9SJohn W. Linville 486007f6c5eSJohannes Berg static int reg_schedule_apply(const struct ieee80211_regdomain *regdom) 4873b377ea9SJohn W. Linville { 488c7d319e5SJohannes Berg struct reg_regdb_apply_request *request; 489c7d319e5SJohannes Berg 490c7d319e5SJohannes Berg request = kzalloc(sizeof(struct reg_regdb_apply_request), GFP_KERNEL); 491007f6c5eSJohannes Berg if (!request) { 492007f6c5eSJohannes Berg kfree(regdom); 493c7d319e5SJohannes Berg return -ENOMEM; 494c7d319e5SJohannes Berg } 4953b377ea9SJohn W. Linville 496007f6c5eSJohannes Berg request->regdom = regdom; 497007f6c5eSJohannes Berg 498c7d319e5SJohannes Berg mutex_lock(®_regdb_apply_mutex); 499c7d319e5SJohannes Berg list_add_tail(&request->list, ®_regdb_apply_list); 500c7d319e5SJohannes Berg mutex_unlock(®_regdb_apply_mutex); 5013b377ea9SJohn W. Linville 5023b377ea9SJohn W. Linville schedule_work(®_regdb_work); 503c7d319e5SJohannes Berg return 0; 5043b377ea9SJohn W. Linville } 50580007efeSLuis R. Rodriguez 506b6863036SJohannes Berg #ifdef CONFIG_CFG80211_CRDA_SUPPORT 507b6863036SJohannes Berg /* Max number of consecutive attempts to communicate with CRDA */ 508b6863036SJohannes Berg #define REG_MAX_CRDA_TIMEOUTS 10 509b6863036SJohannes Berg 510b6863036SJohannes Berg static u32 reg_crda_timeouts; 511b6863036SJohannes Berg 512b6863036SJohannes Berg static void crda_timeout_work(struct work_struct *work); 513b6863036SJohannes Berg static DECLARE_DELAYED_WORK(crda_timeout, crda_timeout_work); 514b6863036SJohannes Berg 515b6863036SJohannes Berg static void crda_timeout_work(struct work_struct *work) 516b6863036SJohannes Berg { 517c799ba6eSJohannes Berg pr_debug("Timeout while waiting for CRDA to reply, restoring regulatory settings\n"); 518b6863036SJohannes Berg rtnl_lock(); 519b6863036SJohannes Berg reg_crda_timeouts++; 520e646a025SJohannes Berg restore_regulatory_settings(true, false); 521b6863036SJohannes Berg rtnl_unlock(); 522b6863036SJohannes Berg } 523b6863036SJohannes Berg 524b6863036SJohannes Berg static void cancel_crda_timeout(void) 525b6863036SJohannes Berg { 526b6863036SJohannes Berg cancel_delayed_work(&crda_timeout); 527b6863036SJohannes Berg } 528b6863036SJohannes Berg 529b6863036SJohannes Berg static void cancel_crda_timeout_sync(void) 530b6863036SJohannes Berg { 531b6863036SJohannes Berg cancel_delayed_work_sync(&crda_timeout); 532b6863036SJohannes Berg } 533b6863036SJohannes Berg 534b6863036SJohannes Berg static void reset_crda_timeouts(void) 535b6863036SJohannes Berg { 536b6863036SJohannes Berg reg_crda_timeouts = 0; 537b6863036SJohannes Berg } 538b6863036SJohannes Berg 539fb1fc7adSLuis R. Rodriguez /* 540fb1fc7adSLuis R. Rodriguez * This lets us keep regulatory code which is updated on a regulatory 5411226d258SJohannes Berg * basis in userspace. 542fb1fc7adSLuis R. Rodriguez */ 543b2e1b302SLuis R. Rodriguez static int call_crda(const char *alpha2) 544b2e1b302SLuis R. Rodriguez { 5451226d258SJohannes Berg char country[12]; 5461226d258SJohannes Berg char *env[] = { country, NULL }; 547c7d319e5SJohannes Berg int ret; 5481226d258SJohannes Berg 5491226d258SJohannes Berg snprintf(country, sizeof(country), "COUNTRY=%c%c", 5501226d258SJohannes Berg alpha2[0], alpha2[1]); 5511226d258SJohannes Berg 552c37722bdSIlan peer if (reg_crda_timeouts > REG_MAX_CRDA_TIMEOUTS) { 553042ab5fcSThomas Petazzoni pr_debug("Exceeded CRDA call max attempts. Not calling CRDA\n"); 554c37722bdSIlan peer return -EINVAL; 555c37722bdSIlan peer } 556c37722bdSIlan peer 557b2e1b302SLuis R. Rodriguez if (!is_world_regdom((char *) alpha2)) 558042ab5fcSThomas Petazzoni pr_debug("Calling CRDA for country: %c%c\n", 559b2e1b302SLuis R. Rodriguez alpha2[0], alpha2[1]); 560b2e1b302SLuis R. Rodriguez else 561042ab5fcSThomas Petazzoni pr_debug("Calling CRDA to update world regulatory domain\n"); 5628318d78aSJohannes Berg 563c7d319e5SJohannes Berg ret = kobject_uevent_env(®_pdev->dev.kobj, KOBJ_CHANGE, env); 564c7d319e5SJohannes Berg if (ret) 565c7d319e5SJohannes Berg return ret; 566c7d319e5SJohannes Berg 567c7d319e5SJohannes Berg queue_delayed_work(system_power_efficient_wq, 568b6863036SJohannes Berg &crda_timeout, msecs_to_jiffies(3142)); 569c7d319e5SJohannes Berg return 0; 570b2e1b302SLuis R. Rodriguez } 571b6863036SJohannes Berg #else 572b6863036SJohannes Berg static inline void cancel_crda_timeout(void) {} 573b6863036SJohannes Berg static inline void cancel_crda_timeout_sync(void) {} 574b6863036SJohannes Berg static inline void reset_crda_timeouts(void) {} 575b6863036SJohannes Berg static inline int call_crda(const char *alpha2) 576b6863036SJohannes Berg { 577b6863036SJohannes Berg return -ENODATA; 578b6863036SJohannes Berg } 579b6863036SJohannes Berg #endif /* CONFIG_CFG80211_CRDA_SUPPORT */ 580b2e1b302SLuis R. Rodriguez 581007f6c5eSJohannes Berg /* code to directly load a firmware database through request_firmware */ 582007f6c5eSJohannes Berg static const struct fwdb_header *regdb; 583007f6c5eSJohannes Berg 584007f6c5eSJohannes Berg struct fwdb_country { 585007f6c5eSJohannes Berg u8 alpha2[2]; 586007f6c5eSJohannes Berg __be16 coll_ptr; 587007f6c5eSJohannes Berg /* this struct cannot be extended */ 588007f6c5eSJohannes Berg } __packed __aligned(4); 589007f6c5eSJohannes Berg 590007f6c5eSJohannes Berg struct fwdb_collection { 591007f6c5eSJohannes Berg u8 len; 592007f6c5eSJohannes Berg u8 n_rules; 593007f6c5eSJohannes Berg u8 dfs_region; 594007f6c5eSJohannes Berg /* no optional data yet */ 595007f6c5eSJohannes Berg /* aligned to 2, then followed by __be16 array of rule pointers */ 596007f6c5eSJohannes Berg } __packed __aligned(4); 597007f6c5eSJohannes Berg 598007f6c5eSJohannes Berg enum fwdb_flags { 599007f6c5eSJohannes Berg FWDB_FLAG_NO_OFDM = BIT(0), 600007f6c5eSJohannes Berg FWDB_FLAG_NO_OUTDOOR = BIT(1), 601007f6c5eSJohannes Berg FWDB_FLAG_DFS = BIT(2), 602007f6c5eSJohannes Berg FWDB_FLAG_NO_IR = BIT(3), 603007f6c5eSJohannes Berg FWDB_FLAG_AUTO_BW = BIT(4), 604007f6c5eSJohannes Berg }; 605007f6c5eSJohannes Berg 606230ebaa1SHaim Dreyfuss struct fwdb_wmm_ac { 607230ebaa1SHaim Dreyfuss u8 ecw; 608230ebaa1SHaim Dreyfuss u8 aifsn; 609230ebaa1SHaim Dreyfuss __be16 cot; 610230ebaa1SHaim Dreyfuss } __packed; 611230ebaa1SHaim Dreyfuss 612230ebaa1SHaim Dreyfuss struct fwdb_wmm_rule { 613230ebaa1SHaim Dreyfuss struct fwdb_wmm_ac client[IEEE80211_NUM_ACS]; 614230ebaa1SHaim Dreyfuss struct fwdb_wmm_ac ap[IEEE80211_NUM_ACS]; 615230ebaa1SHaim Dreyfuss } __packed; 616230ebaa1SHaim Dreyfuss 617007f6c5eSJohannes Berg struct fwdb_rule { 618007f6c5eSJohannes Berg u8 len; 619007f6c5eSJohannes Berg u8 flags; 620007f6c5eSJohannes Berg __be16 max_eirp; 621007f6c5eSJohannes Berg __be32 start, end, max_bw; 622007f6c5eSJohannes Berg /* start of optional data */ 623007f6c5eSJohannes Berg __be16 cac_timeout; 624230ebaa1SHaim Dreyfuss __be16 wmm_ptr; 625007f6c5eSJohannes Berg } __packed __aligned(4); 626007f6c5eSJohannes Berg 627007f6c5eSJohannes Berg #define FWDB_MAGIC 0x52474442 628007f6c5eSJohannes Berg #define FWDB_VERSION 20 629007f6c5eSJohannes Berg 630007f6c5eSJohannes Berg struct fwdb_header { 631007f6c5eSJohannes Berg __be32 magic; 632007f6c5eSJohannes Berg __be32 version; 633007f6c5eSJohannes Berg struct fwdb_country country[]; 634007f6c5eSJohannes Berg } __packed __aligned(4); 635007f6c5eSJohannes Berg 636230ebaa1SHaim Dreyfuss static int ecw2cw(int ecw) 637230ebaa1SHaim Dreyfuss { 638230ebaa1SHaim Dreyfuss return (1 << ecw) - 1; 639230ebaa1SHaim Dreyfuss } 640230ebaa1SHaim Dreyfuss 641230ebaa1SHaim Dreyfuss static bool valid_wmm(struct fwdb_wmm_rule *rule) 642230ebaa1SHaim Dreyfuss { 643230ebaa1SHaim Dreyfuss struct fwdb_wmm_ac *ac = (struct fwdb_wmm_ac *)rule; 644230ebaa1SHaim Dreyfuss int i; 645230ebaa1SHaim Dreyfuss 646230ebaa1SHaim Dreyfuss for (i = 0; i < IEEE80211_NUM_ACS * 2; i++) { 647230ebaa1SHaim Dreyfuss u16 cw_min = ecw2cw((ac[i].ecw & 0xf0) >> 4); 648230ebaa1SHaim Dreyfuss u16 cw_max = ecw2cw(ac[i].ecw & 0x0f); 649230ebaa1SHaim Dreyfuss u8 aifsn = ac[i].aifsn; 650230ebaa1SHaim Dreyfuss 651230ebaa1SHaim Dreyfuss if (cw_min >= cw_max) 652230ebaa1SHaim Dreyfuss return false; 653230ebaa1SHaim Dreyfuss 654230ebaa1SHaim Dreyfuss if (aifsn < 1) 655230ebaa1SHaim Dreyfuss return false; 656230ebaa1SHaim Dreyfuss } 657230ebaa1SHaim Dreyfuss 658230ebaa1SHaim Dreyfuss return true; 659230ebaa1SHaim Dreyfuss } 660230ebaa1SHaim Dreyfuss 661007f6c5eSJohannes Berg static bool valid_rule(const u8 *data, unsigned int size, u16 rule_ptr) 662007f6c5eSJohannes Berg { 663007f6c5eSJohannes Berg struct fwdb_rule *rule = (void *)(data + (rule_ptr << 2)); 664007f6c5eSJohannes Berg 665007f6c5eSJohannes Berg if ((u8 *)rule + sizeof(rule->len) > data + size) 666007f6c5eSJohannes Berg return false; 667007f6c5eSJohannes Berg 668007f6c5eSJohannes Berg /* mandatory fields */ 669007f6c5eSJohannes Berg if (rule->len < offsetofend(struct fwdb_rule, max_bw)) 670007f6c5eSJohannes Berg return false; 671230ebaa1SHaim Dreyfuss if (rule->len >= offsetofend(struct fwdb_rule, wmm_ptr)) { 672230ebaa1SHaim Dreyfuss u32 wmm_ptr = be16_to_cpu(rule->wmm_ptr) << 2; 673230ebaa1SHaim Dreyfuss struct fwdb_wmm_rule *wmm; 674007f6c5eSJohannes Berg 675230ebaa1SHaim Dreyfuss if (wmm_ptr + sizeof(struct fwdb_wmm_rule) > size) 676230ebaa1SHaim Dreyfuss return false; 677230ebaa1SHaim Dreyfuss 678230ebaa1SHaim Dreyfuss wmm = (void *)(data + wmm_ptr); 679230ebaa1SHaim Dreyfuss 680230ebaa1SHaim Dreyfuss if (!valid_wmm(wmm)) 681230ebaa1SHaim Dreyfuss return false; 682230ebaa1SHaim Dreyfuss } 683007f6c5eSJohannes Berg return true; 684007f6c5eSJohannes Berg } 685007f6c5eSJohannes Berg 686007f6c5eSJohannes Berg static bool valid_country(const u8 *data, unsigned int size, 687007f6c5eSJohannes Berg const struct fwdb_country *country) 688007f6c5eSJohannes Berg { 689007f6c5eSJohannes Berg unsigned int ptr = be16_to_cpu(country->coll_ptr) << 2; 690007f6c5eSJohannes Berg struct fwdb_collection *coll = (void *)(data + ptr); 691007f6c5eSJohannes Berg __be16 *rules_ptr; 692007f6c5eSJohannes Berg unsigned int i; 693007f6c5eSJohannes Berg 694007f6c5eSJohannes Berg /* make sure we can read len/n_rules */ 695007f6c5eSJohannes Berg if ((u8 *)coll + offsetofend(typeof(*coll), n_rules) > data + size) 696007f6c5eSJohannes Berg return false; 697007f6c5eSJohannes Berg 698007f6c5eSJohannes Berg /* make sure base struct and all rules fit */ 699007f6c5eSJohannes Berg if ((u8 *)coll + ALIGN(coll->len, 2) + 700007f6c5eSJohannes Berg (coll->n_rules * 2) > data + size) 701007f6c5eSJohannes Berg return false; 702007f6c5eSJohannes Berg 703007f6c5eSJohannes Berg /* mandatory fields must exist */ 704007f6c5eSJohannes Berg if (coll->len < offsetofend(struct fwdb_collection, dfs_region)) 705007f6c5eSJohannes Berg return false; 706007f6c5eSJohannes Berg 707007f6c5eSJohannes Berg rules_ptr = (void *)((u8 *)coll + ALIGN(coll->len, 2)); 708007f6c5eSJohannes Berg 709007f6c5eSJohannes Berg for (i = 0; i < coll->n_rules; i++) { 710007f6c5eSJohannes Berg u16 rule_ptr = be16_to_cpu(rules_ptr[i]); 711007f6c5eSJohannes Berg 712007f6c5eSJohannes Berg if (!valid_rule(data, size, rule_ptr)) 713007f6c5eSJohannes Berg return false; 714007f6c5eSJohannes Berg } 715007f6c5eSJohannes Berg 716007f6c5eSJohannes Berg return true; 717007f6c5eSJohannes Berg } 718007f6c5eSJohannes Berg 71990a53e44SJohannes Berg #ifdef CONFIG_CFG80211_REQUIRE_SIGNED_REGDB 72090a53e44SJohannes Berg static struct key *builtin_regdb_keys; 72190a53e44SJohannes Berg 72290a53e44SJohannes Berg static void __init load_keys_from_buffer(const u8 *p, unsigned int buflen) 72390a53e44SJohannes Berg { 72490a53e44SJohannes Berg const u8 *end = p + buflen; 72590a53e44SJohannes Berg size_t plen; 72690a53e44SJohannes Berg key_ref_t key; 72790a53e44SJohannes Berg 72890a53e44SJohannes Berg while (p < end) { 72990a53e44SJohannes Berg /* Each cert begins with an ASN.1 SEQUENCE tag and must be more 73090a53e44SJohannes Berg * than 256 bytes in size. 73190a53e44SJohannes Berg */ 73290a53e44SJohannes Berg if (end - p < 4) 73390a53e44SJohannes Berg goto dodgy_cert; 73490a53e44SJohannes Berg if (p[0] != 0x30 && 73590a53e44SJohannes Berg p[1] != 0x82) 73690a53e44SJohannes Berg goto dodgy_cert; 73790a53e44SJohannes Berg plen = (p[2] << 8) | p[3]; 73890a53e44SJohannes Berg plen += 4; 73990a53e44SJohannes Berg if (plen > end - p) 74090a53e44SJohannes Berg goto dodgy_cert; 74190a53e44SJohannes Berg 74290a53e44SJohannes Berg key = key_create_or_update(make_key_ref(builtin_regdb_keys, 1), 74390a53e44SJohannes Berg "asymmetric", NULL, p, plen, 744028db3e2SLinus Torvalds ((KEY_POS_ALL & ~KEY_POS_SETATTR) | 745028db3e2SLinus Torvalds KEY_USR_VIEW | KEY_USR_READ), 74690a53e44SJohannes Berg KEY_ALLOC_NOT_IN_QUOTA | 74790a53e44SJohannes Berg KEY_ALLOC_BUILT_IN | 74890a53e44SJohannes Berg KEY_ALLOC_BYPASS_RESTRICTION); 74990a53e44SJohannes Berg if (IS_ERR(key)) { 75090a53e44SJohannes Berg pr_err("Problem loading in-kernel X.509 certificate (%ld)\n", 75190a53e44SJohannes Berg PTR_ERR(key)); 75290a53e44SJohannes Berg } else { 75390a53e44SJohannes Berg pr_notice("Loaded X.509 cert '%s'\n", 75490a53e44SJohannes Berg key_ref_to_ptr(key)->description); 75590a53e44SJohannes Berg key_ref_put(key); 75690a53e44SJohannes Berg } 75790a53e44SJohannes Berg p += plen; 75890a53e44SJohannes Berg } 75990a53e44SJohannes Berg 76090a53e44SJohannes Berg return; 76190a53e44SJohannes Berg 76290a53e44SJohannes Berg dodgy_cert: 76390a53e44SJohannes Berg pr_err("Problem parsing in-kernel X.509 certificate list\n"); 76490a53e44SJohannes Berg } 76590a53e44SJohannes Berg 76690a53e44SJohannes Berg static int __init load_builtin_regdb_keys(void) 76790a53e44SJohannes Berg { 76890a53e44SJohannes Berg builtin_regdb_keys = 76990a53e44SJohannes Berg keyring_alloc(".builtin_regdb_keys", 77090a53e44SJohannes Berg KUIDT_INIT(0), KGIDT_INIT(0), current_cred(), 771028db3e2SLinus Torvalds ((KEY_POS_ALL & ~KEY_POS_SETATTR) | 772028db3e2SLinus Torvalds KEY_USR_VIEW | KEY_USR_READ | KEY_USR_SEARCH), 77390a53e44SJohannes Berg KEY_ALLOC_NOT_IN_QUOTA, NULL, NULL); 77490a53e44SJohannes Berg if (IS_ERR(builtin_regdb_keys)) 77590a53e44SJohannes Berg return PTR_ERR(builtin_regdb_keys); 77690a53e44SJohannes Berg 77790a53e44SJohannes Berg pr_notice("Loading compiled-in X.509 certificates for regulatory database\n"); 77890a53e44SJohannes Berg 77990a53e44SJohannes Berg #ifdef CONFIG_CFG80211_USE_KERNEL_REGDB_KEYS 78090a53e44SJohannes Berg load_keys_from_buffer(shipped_regdb_certs, shipped_regdb_certs_len); 78190a53e44SJohannes Berg #endif 78288230ef1SArnd Bergmann #ifdef CONFIG_CFG80211_EXTRA_REGDB_KEYDIR 78390a53e44SJohannes Berg if (CONFIG_CFG80211_EXTRA_REGDB_KEYDIR[0] != '\0') 78490a53e44SJohannes Berg load_keys_from_buffer(extra_regdb_certs, extra_regdb_certs_len); 78590a53e44SJohannes Berg #endif 78690a53e44SJohannes Berg 78790a53e44SJohannes Berg return 0; 78890a53e44SJohannes Berg } 78990a53e44SJohannes Berg 79090a53e44SJohannes Berg static bool regdb_has_valid_signature(const u8 *data, unsigned int size) 79190a53e44SJohannes Berg { 79290a53e44SJohannes Berg const struct firmware *sig; 79390a53e44SJohannes Berg bool result; 79490a53e44SJohannes Berg 79590a53e44SJohannes Berg if (request_firmware(&sig, "regulatory.db.p7s", ®_pdev->dev)) 79690a53e44SJohannes Berg return false; 79790a53e44SJohannes Berg 79890a53e44SJohannes Berg result = verify_pkcs7_signature(data, size, sig->data, sig->size, 79990a53e44SJohannes Berg builtin_regdb_keys, 80090a53e44SJohannes Berg VERIFYING_UNSPECIFIED_SIGNATURE, 80190a53e44SJohannes Berg NULL, NULL) == 0; 80290a53e44SJohannes Berg 80390a53e44SJohannes Berg release_firmware(sig); 80490a53e44SJohannes Berg 80590a53e44SJohannes Berg return result; 80690a53e44SJohannes Berg } 80790a53e44SJohannes Berg 80890a53e44SJohannes Berg static void free_regdb_keyring(void) 80990a53e44SJohannes Berg { 81090a53e44SJohannes Berg key_put(builtin_regdb_keys); 81190a53e44SJohannes Berg } 81290a53e44SJohannes Berg #else 81390a53e44SJohannes Berg static int load_builtin_regdb_keys(void) 81490a53e44SJohannes Berg { 81590a53e44SJohannes Berg return 0; 81690a53e44SJohannes Berg } 81790a53e44SJohannes Berg 81890a53e44SJohannes Berg static bool regdb_has_valid_signature(const u8 *data, unsigned int size) 81990a53e44SJohannes Berg { 82090a53e44SJohannes Berg return true; 82190a53e44SJohannes Berg } 82290a53e44SJohannes Berg 82390a53e44SJohannes Berg static void free_regdb_keyring(void) 82490a53e44SJohannes Berg { 82590a53e44SJohannes Berg } 82690a53e44SJohannes Berg #endif /* CONFIG_CFG80211_REQUIRE_SIGNED_REGDB */ 82790a53e44SJohannes Berg 828007f6c5eSJohannes Berg static bool valid_regdb(const u8 *data, unsigned int size) 829007f6c5eSJohannes Berg { 830007f6c5eSJohannes Berg const struct fwdb_header *hdr = (void *)data; 831007f6c5eSJohannes Berg const struct fwdb_country *country; 832007f6c5eSJohannes Berg 833007f6c5eSJohannes Berg if (size < sizeof(*hdr)) 834007f6c5eSJohannes Berg return false; 835007f6c5eSJohannes Berg 836007f6c5eSJohannes Berg if (hdr->magic != cpu_to_be32(FWDB_MAGIC)) 837007f6c5eSJohannes Berg return false; 838007f6c5eSJohannes Berg 839007f6c5eSJohannes Berg if (hdr->version != cpu_to_be32(FWDB_VERSION)) 840007f6c5eSJohannes Berg return false; 841007f6c5eSJohannes Berg 84290a53e44SJohannes Berg if (!regdb_has_valid_signature(data, size)) 84390a53e44SJohannes Berg return false; 84490a53e44SJohannes Berg 845007f6c5eSJohannes Berg country = &hdr->country[0]; 846007f6c5eSJohannes Berg while ((u8 *)(country + 1) <= data + size) { 847007f6c5eSJohannes Berg if (!country->coll_ptr) 848007f6c5eSJohannes Berg break; 849007f6c5eSJohannes Berg if (!valid_country(data, size, country)) 850007f6c5eSJohannes Berg return false; 851007f6c5eSJohannes Berg country++; 852007f6c5eSJohannes Berg } 853007f6c5eSJohannes Berg 854007f6c5eSJohannes Berg return true; 855007f6c5eSJohannes Berg } 856007f6c5eSJohannes Berg 857014f5a25SStanislaw Gruszka static void set_wmm_rule(const struct fwdb_header *db, 858014f5a25SStanislaw Gruszka const struct fwdb_country *country, 859014f5a25SStanislaw Gruszka const struct fwdb_rule *rule, 860014f5a25SStanislaw Gruszka struct ieee80211_reg_rule *rrule) 861230ebaa1SHaim Dreyfuss { 862014f5a25SStanislaw Gruszka struct ieee80211_wmm_rule *wmm_rule = &rrule->wmm_rule; 863014f5a25SStanislaw Gruszka struct fwdb_wmm_rule *wmm; 864014f5a25SStanislaw Gruszka unsigned int i, wmm_ptr; 865014f5a25SStanislaw Gruszka 866014f5a25SStanislaw Gruszka wmm_ptr = be16_to_cpu(rule->wmm_ptr) << 2; 867014f5a25SStanislaw Gruszka wmm = (void *)((u8 *)db + wmm_ptr); 868014f5a25SStanislaw Gruszka 869014f5a25SStanislaw Gruszka if (!valid_wmm(wmm)) { 870014f5a25SStanislaw Gruszka pr_err("Invalid regulatory WMM rule %u-%u in domain %c%c\n", 871014f5a25SStanislaw Gruszka be32_to_cpu(rule->start), be32_to_cpu(rule->end), 872014f5a25SStanislaw Gruszka country->alpha2[0], country->alpha2[1]); 873014f5a25SStanislaw Gruszka return; 874014f5a25SStanislaw Gruszka } 875230ebaa1SHaim Dreyfuss 876230ebaa1SHaim Dreyfuss for (i = 0; i < IEEE80211_NUM_ACS; i++) { 877014f5a25SStanislaw Gruszka wmm_rule->client[i].cw_min = 878230ebaa1SHaim Dreyfuss ecw2cw((wmm->client[i].ecw & 0xf0) >> 4); 879014f5a25SStanislaw Gruszka wmm_rule->client[i].cw_max = ecw2cw(wmm->client[i].ecw & 0x0f); 880014f5a25SStanislaw Gruszka wmm_rule->client[i].aifsn = wmm->client[i].aifsn; 881014f5a25SStanislaw Gruszka wmm_rule->client[i].cot = 882014f5a25SStanislaw Gruszka 1000 * be16_to_cpu(wmm->client[i].cot); 883014f5a25SStanislaw Gruszka wmm_rule->ap[i].cw_min = ecw2cw((wmm->ap[i].ecw & 0xf0) >> 4); 884014f5a25SStanislaw Gruszka wmm_rule->ap[i].cw_max = ecw2cw(wmm->ap[i].ecw & 0x0f); 885014f5a25SStanislaw Gruszka wmm_rule->ap[i].aifsn = wmm->ap[i].aifsn; 886014f5a25SStanislaw Gruszka wmm_rule->ap[i].cot = 1000 * be16_to_cpu(wmm->ap[i].cot); 887230ebaa1SHaim Dreyfuss } 88838cb87eeSStanislaw Gruszka 88938cb87eeSStanislaw Gruszka rrule->has_wmm = true; 890230ebaa1SHaim Dreyfuss } 891230ebaa1SHaim Dreyfuss 89219d3577eSHaim Dreyfuss static int __regdb_query_wmm(const struct fwdb_header *db, 89319d3577eSHaim Dreyfuss const struct fwdb_country *country, int freq, 894014f5a25SStanislaw Gruszka struct ieee80211_reg_rule *rrule) 89519d3577eSHaim Dreyfuss { 89619d3577eSHaim Dreyfuss unsigned int ptr = be16_to_cpu(country->coll_ptr) << 2; 89719d3577eSHaim Dreyfuss struct fwdb_collection *coll = (void *)((u8 *)db + ptr); 89819d3577eSHaim Dreyfuss int i; 89919d3577eSHaim Dreyfuss 90019d3577eSHaim Dreyfuss for (i = 0; i < coll->n_rules; i++) { 90119d3577eSHaim Dreyfuss __be16 *rules_ptr = (void *)((u8 *)coll + ALIGN(coll->len, 2)); 90219d3577eSHaim Dreyfuss unsigned int rule_ptr = be16_to_cpu(rules_ptr[i]) << 2; 903014f5a25SStanislaw Gruszka struct fwdb_rule *rule = (void *)((u8 *)db + rule_ptr); 90419d3577eSHaim Dreyfuss 905014f5a25SStanislaw Gruszka if (rule->len < offsetofend(struct fwdb_rule, wmm_ptr)) 90619d3577eSHaim Dreyfuss continue; 90719d3577eSHaim Dreyfuss 908014f5a25SStanislaw Gruszka if (freq >= KHZ_TO_MHZ(be32_to_cpu(rule->start)) && 909014f5a25SStanislaw Gruszka freq <= KHZ_TO_MHZ(be32_to_cpu(rule->end))) { 910014f5a25SStanislaw Gruszka set_wmm_rule(db, country, rule, rrule); 91119d3577eSHaim Dreyfuss return 0; 91219d3577eSHaim Dreyfuss } 91319d3577eSHaim Dreyfuss } 91419d3577eSHaim Dreyfuss 91519d3577eSHaim Dreyfuss return -ENODATA; 91619d3577eSHaim Dreyfuss } 91719d3577eSHaim Dreyfuss 91838cb87eeSStanislaw Gruszka int reg_query_regdb_wmm(char *alpha2, int freq, struct ieee80211_reg_rule *rule) 91919d3577eSHaim Dreyfuss { 92019d3577eSHaim Dreyfuss const struct fwdb_header *hdr = regdb; 92119d3577eSHaim Dreyfuss const struct fwdb_country *country; 92219d3577eSHaim Dreyfuss 9235247a77cSHaim Dreyfuss if (!regdb) 9245247a77cSHaim Dreyfuss return -ENODATA; 9255247a77cSHaim Dreyfuss 92619d3577eSHaim Dreyfuss if (IS_ERR(regdb)) 92719d3577eSHaim Dreyfuss return PTR_ERR(regdb); 92819d3577eSHaim Dreyfuss 92919d3577eSHaim Dreyfuss country = &hdr->country[0]; 93019d3577eSHaim Dreyfuss while (country->coll_ptr) { 93119d3577eSHaim Dreyfuss if (alpha2_equal(alpha2, country->alpha2)) 93238cb87eeSStanislaw Gruszka return __regdb_query_wmm(regdb, country, freq, rule); 93319d3577eSHaim Dreyfuss 93419d3577eSHaim Dreyfuss country++; 93519d3577eSHaim Dreyfuss } 93619d3577eSHaim Dreyfuss 93719d3577eSHaim Dreyfuss return -ENODATA; 93819d3577eSHaim Dreyfuss } 93919d3577eSHaim Dreyfuss EXPORT_SYMBOL(reg_query_regdb_wmm); 94019d3577eSHaim Dreyfuss 941007f6c5eSJohannes Berg static int regdb_query_country(const struct fwdb_header *db, 942007f6c5eSJohannes Berg const struct fwdb_country *country) 943007f6c5eSJohannes Berg { 944007f6c5eSJohannes Berg unsigned int ptr = be16_to_cpu(country->coll_ptr) << 2; 945007f6c5eSJohannes Berg struct fwdb_collection *coll = (void *)((u8 *)db + ptr); 946007f6c5eSJohannes Berg struct ieee80211_regdomain *regdom; 9479f8c7136SGustavo A. R. Silva unsigned int i; 948007f6c5eSJohannes Berg 9499f8c7136SGustavo A. R. Silva regdom = kzalloc(struct_size(regdom, reg_rules, coll->n_rules), 9509f8c7136SGustavo A. R. Silva GFP_KERNEL); 951007f6c5eSJohannes Berg if (!regdom) 952007f6c5eSJohannes Berg return -ENOMEM; 953007f6c5eSJohannes Berg 954007f6c5eSJohannes Berg regdom->n_reg_rules = coll->n_rules; 955007f6c5eSJohannes Berg regdom->alpha2[0] = country->alpha2[0]; 956007f6c5eSJohannes Berg regdom->alpha2[1] = country->alpha2[1]; 957007f6c5eSJohannes Berg regdom->dfs_region = coll->dfs_region; 958007f6c5eSJohannes Berg 959007f6c5eSJohannes Berg for (i = 0; i < regdom->n_reg_rules; i++) { 960007f6c5eSJohannes Berg __be16 *rules_ptr = (void *)((u8 *)coll + ALIGN(coll->len, 2)); 961007f6c5eSJohannes Berg unsigned int rule_ptr = be16_to_cpu(rules_ptr[i]) << 2; 962007f6c5eSJohannes Berg struct fwdb_rule *rule = (void *)((u8 *)db + rule_ptr); 963007f6c5eSJohannes Berg struct ieee80211_reg_rule *rrule = ®dom->reg_rules[i]; 964007f6c5eSJohannes Berg 965007f6c5eSJohannes Berg rrule->freq_range.start_freq_khz = be32_to_cpu(rule->start); 966007f6c5eSJohannes Berg rrule->freq_range.end_freq_khz = be32_to_cpu(rule->end); 967007f6c5eSJohannes Berg rrule->freq_range.max_bandwidth_khz = be32_to_cpu(rule->max_bw); 968007f6c5eSJohannes Berg 969007f6c5eSJohannes Berg rrule->power_rule.max_antenna_gain = 0; 970007f6c5eSJohannes Berg rrule->power_rule.max_eirp = be16_to_cpu(rule->max_eirp); 971007f6c5eSJohannes Berg 972007f6c5eSJohannes Berg rrule->flags = 0; 973007f6c5eSJohannes Berg if (rule->flags & FWDB_FLAG_NO_OFDM) 974007f6c5eSJohannes Berg rrule->flags |= NL80211_RRF_NO_OFDM; 975007f6c5eSJohannes Berg if (rule->flags & FWDB_FLAG_NO_OUTDOOR) 976007f6c5eSJohannes Berg rrule->flags |= NL80211_RRF_NO_OUTDOOR; 977007f6c5eSJohannes Berg if (rule->flags & FWDB_FLAG_DFS) 978007f6c5eSJohannes Berg rrule->flags |= NL80211_RRF_DFS; 979007f6c5eSJohannes Berg if (rule->flags & FWDB_FLAG_NO_IR) 980007f6c5eSJohannes Berg rrule->flags |= NL80211_RRF_NO_IR; 981007f6c5eSJohannes Berg if (rule->flags & FWDB_FLAG_AUTO_BW) 982007f6c5eSJohannes Berg rrule->flags |= NL80211_RRF_AUTO_BW; 983007f6c5eSJohannes Berg 984007f6c5eSJohannes Berg rrule->dfs_cac_ms = 0; 985007f6c5eSJohannes Berg 986007f6c5eSJohannes Berg /* handle optional data */ 987007f6c5eSJohannes Berg if (rule->len >= offsetofend(struct fwdb_rule, cac_timeout)) 988007f6c5eSJohannes Berg rrule->dfs_cac_ms = 989007f6c5eSJohannes Berg 1000 * be16_to_cpu(rule->cac_timeout); 990014f5a25SStanislaw Gruszka if (rule->len >= offsetofend(struct fwdb_rule, wmm_ptr)) 991014f5a25SStanislaw Gruszka set_wmm_rule(db, country, rule, rrule); 992230ebaa1SHaim Dreyfuss } 993007f6c5eSJohannes Berg 994007f6c5eSJohannes Berg return reg_schedule_apply(regdom); 995007f6c5eSJohannes Berg } 996007f6c5eSJohannes Berg 997007f6c5eSJohannes Berg static int query_regdb(const char *alpha2) 998007f6c5eSJohannes Berg { 999007f6c5eSJohannes Berg const struct fwdb_header *hdr = regdb; 1000007f6c5eSJohannes Berg const struct fwdb_country *country; 1001007f6c5eSJohannes Berg 10021ea4ff3eSJohannes Berg ASSERT_RTNL(); 10031ea4ff3eSJohannes Berg 1004007f6c5eSJohannes Berg if (IS_ERR(regdb)) 1005007f6c5eSJohannes Berg return PTR_ERR(regdb); 1006007f6c5eSJohannes Berg 1007007f6c5eSJohannes Berg country = &hdr->country[0]; 1008007f6c5eSJohannes Berg while (country->coll_ptr) { 1009007f6c5eSJohannes Berg if (alpha2_equal(alpha2, country->alpha2)) 1010007f6c5eSJohannes Berg return regdb_query_country(regdb, country); 1011007f6c5eSJohannes Berg country++; 1012007f6c5eSJohannes Berg } 1013007f6c5eSJohannes Berg 1014007f6c5eSJohannes Berg return -ENODATA; 1015007f6c5eSJohannes Berg } 1016007f6c5eSJohannes Berg 1017007f6c5eSJohannes Berg static void regdb_fw_cb(const struct firmware *fw, void *context) 1018007f6c5eSJohannes Berg { 10191ea4ff3eSJohannes Berg int set_error = 0; 10201ea4ff3eSJohannes Berg bool restore = true; 1021007f6c5eSJohannes Berg void *db; 1022007f6c5eSJohannes Berg 1023007f6c5eSJohannes Berg if (!fw) { 1024007f6c5eSJohannes Berg pr_info("failed to load regulatory.db\n"); 10251ea4ff3eSJohannes Berg set_error = -ENODATA; 10261ea4ff3eSJohannes Berg } else if (!valid_regdb(fw->data, fw->size)) { 102790a53e44SJohannes Berg pr_info("loaded regulatory.db is malformed or signature is missing/invalid\n"); 10281ea4ff3eSJohannes Berg set_error = -EINVAL; 1029007f6c5eSJohannes Berg } 1030007f6c5eSJohannes Berg 1031007f6c5eSJohannes Berg rtnl_lock(); 1032faae54adSChaitanya Tata if (regdb && !IS_ERR(regdb)) { 1033faae54adSChaitanya Tata /* negative case - a bug 1034faae54adSChaitanya Tata * positive case - can happen due to race in case of multiple cb's in 1035faae54adSChaitanya Tata * queue, due to usage of asynchronous callback 1036faae54adSChaitanya Tata * 1037faae54adSChaitanya Tata * Either case, just restore and free new db. 1038faae54adSChaitanya Tata */ 10391ea4ff3eSJohannes Berg } else if (set_error) { 10401ea4ff3eSJohannes Berg regdb = ERR_PTR(set_error); 10411ea4ff3eSJohannes Berg } else if (fw) { 10421ea4ff3eSJohannes Berg db = kmemdup(fw->data, fw->size, GFP_KERNEL); 10431ea4ff3eSJohannes Berg if (db) { 10441ea4ff3eSJohannes Berg regdb = db; 10451ea4ff3eSJohannes Berg restore = context && query_regdb(context); 10461ea4ff3eSJohannes Berg } else { 10471ea4ff3eSJohannes Berg restore = true; 10481ea4ff3eSJohannes Berg } 10491ea4ff3eSJohannes Berg } 10501ea4ff3eSJohannes Berg 10511ea4ff3eSJohannes Berg if (restore) 1052e646a025SJohannes Berg restore_regulatory_settings(true, false); 10531ea4ff3eSJohannes Berg 1054007f6c5eSJohannes Berg rtnl_unlock(); 10551ea4ff3eSJohannes Berg 1056007f6c5eSJohannes Berg kfree(context); 10571ea4ff3eSJohannes Berg 10581ea4ff3eSJohannes Berg release_firmware(fw); 1059007f6c5eSJohannes Berg } 1060007f6c5eSJohannes Berg 1061007f6c5eSJohannes Berg static int query_regdb_file(const char *alpha2) 1062007f6c5eSJohannes Berg { 10631ea4ff3eSJohannes Berg ASSERT_RTNL(); 10641ea4ff3eSJohannes Berg 1065007f6c5eSJohannes Berg if (regdb) 1066007f6c5eSJohannes Berg return query_regdb(alpha2); 1067007f6c5eSJohannes Berg 1068007f6c5eSJohannes Berg alpha2 = kmemdup(alpha2, 2, GFP_KERNEL); 1069007f6c5eSJohannes Berg if (!alpha2) 1070007f6c5eSJohannes Berg return -ENOMEM; 1071007f6c5eSJohannes Berg 1072007f6c5eSJohannes Berg return request_firmware_nowait(THIS_MODULE, true, "regulatory.db", 1073007f6c5eSJohannes Berg ®_pdev->dev, GFP_KERNEL, 1074007f6c5eSJohannes Berg (void *)alpha2, regdb_fw_cb); 1075007f6c5eSJohannes Berg } 1076007f6c5eSJohannes Berg 10771ea4ff3eSJohannes Berg int reg_reload_regdb(void) 10781ea4ff3eSJohannes Berg { 10791ea4ff3eSJohannes Berg const struct firmware *fw; 10801ea4ff3eSJohannes Berg void *db; 10811ea4ff3eSJohannes Berg int err; 10821ea4ff3eSJohannes Berg 10831ea4ff3eSJohannes Berg err = request_firmware(&fw, "regulatory.db", ®_pdev->dev); 10841ea4ff3eSJohannes Berg if (err) 10851ea4ff3eSJohannes Berg return err; 10861ea4ff3eSJohannes Berg 10871ea4ff3eSJohannes Berg if (!valid_regdb(fw->data, fw->size)) { 10881ea4ff3eSJohannes Berg err = -ENODATA; 10891ea4ff3eSJohannes Berg goto out; 10901ea4ff3eSJohannes Berg } 10911ea4ff3eSJohannes Berg 10921ea4ff3eSJohannes Berg db = kmemdup(fw->data, fw->size, GFP_KERNEL); 10931ea4ff3eSJohannes Berg if (!db) { 10941ea4ff3eSJohannes Berg err = -ENOMEM; 10951ea4ff3eSJohannes Berg goto out; 10961ea4ff3eSJohannes Berg } 10971ea4ff3eSJohannes Berg 10981ea4ff3eSJohannes Berg rtnl_lock(); 10991ea4ff3eSJohannes Berg if (!IS_ERR_OR_NULL(regdb)) 11001ea4ff3eSJohannes Berg kfree(regdb); 11011ea4ff3eSJohannes Berg regdb = db; 11021ea4ff3eSJohannes Berg rtnl_unlock(); 11031ea4ff3eSJohannes Berg 11041ea4ff3eSJohannes Berg out: 11051ea4ff3eSJohannes Berg release_firmware(fw); 11061ea4ff3eSJohannes Berg return err; 11071ea4ff3eSJohannes Berg } 11081ea4ff3eSJohannes Berg 1109cecbb069SJohannes Berg static bool reg_query_database(struct regulatory_request *request) 1110fe6631ffSLuis R. Rodriguez { 1111007f6c5eSJohannes Berg if (query_regdb_file(request->alpha2) == 0) 1112007f6c5eSJohannes Berg return true; 1113007f6c5eSJohannes Berg 1114c7d319e5SJohannes Berg if (call_crda(request->alpha2) == 0) 1115c7d319e5SJohannes Berg return true; 1116c7d319e5SJohannes Berg 1117c7d319e5SJohannes Berg return false; 1118fe6631ffSLuis R. Rodriguez } 1119fe6631ffSLuis R. Rodriguez 1120e438768fSLuis R. Rodriguez bool reg_is_valid_request(const char *alpha2) 1121b2e1b302SLuis R. Rodriguez { 1122c492db37SJohannes Berg struct regulatory_request *lr = get_last_request(); 112361405e97SLuis R. Rodriguez 1124c492db37SJohannes Berg if (!lr || lr->processed) 1125f6037d09SJohannes Berg return false; 1126f6037d09SJohannes Berg 1127c492db37SJohannes Berg return alpha2_equal(lr->alpha2, alpha2); 1128b2e1b302SLuis R. Rodriguez } 1129b2e1b302SLuis R. Rodriguez 1130e3961af1SJanusz Dziedzic static const struct ieee80211_regdomain *reg_get_regdomain(struct wiphy *wiphy) 1131e3961af1SJanusz Dziedzic { 1132e3961af1SJanusz Dziedzic struct regulatory_request *lr = get_last_request(); 1133e3961af1SJanusz Dziedzic 1134e3961af1SJanusz Dziedzic /* 1135e3961af1SJanusz Dziedzic * Follow the driver's regulatory domain, if present, unless a country 1136e3961af1SJanusz Dziedzic * IE has been processed or a user wants to help complaince further 1137e3961af1SJanusz Dziedzic */ 1138e3961af1SJanusz Dziedzic if (lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && 1139e3961af1SJanusz Dziedzic lr->initiator != NL80211_REGDOM_SET_BY_USER && 1140e3961af1SJanusz Dziedzic wiphy->regd) 1141e3961af1SJanusz Dziedzic return get_wiphy_regdom(wiphy); 1142e3961af1SJanusz Dziedzic 1143e3961af1SJanusz Dziedzic return get_cfg80211_regdom(); 1144e3961af1SJanusz Dziedzic } 1145e3961af1SJanusz Dziedzic 1146a6d4a534SArik Nemtsov static unsigned int 1147a6d4a534SArik Nemtsov reg_get_max_bandwidth_from_range(const struct ieee80211_regdomain *rd, 114897524820SJanusz Dziedzic const struct ieee80211_reg_rule *rule) 114997524820SJanusz Dziedzic { 115097524820SJanusz Dziedzic const struct ieee80211_freq_range *freq_range = &rule->freq_range; 115197524820SJanusz Dziedzic const struct ieee80211_freq_range *freq_range_tmp; 115297524820SJanusz Dziedzic const struct ieee80211_reg_rule *tmp; 115397524820SJanusz Dziedzic u32 start_freq, end_freq, idx, no; 115497524820SJanusz Dziedzic 115597524820SJanusz Dziedzic for (idx = 0; idx < rd->n_reg_rules; idx++) 115697524820SJanusz Dziedzic if (rule == &rd->reg_rules[idx]) 115797524820SJanusz Dziedzic break; 115897524820SJanusz Dziedzic 115997524820SJanusz Dziedzic if (idx == rd->n_reg_rules) 116097524820SJanusz Dziedzic return 0; 116197524820SJanusz Dziedzic 116297524820SJanusz Dziedzic /* get start_freq */ 116397524820SJanusz Dziedzic no = idx; 116497524820SJanusz Dziedzic 116597524820SJanusz Dziedzic while (no) { 116697524820SJanusz Dziedzic tmp = &rd->reg_rules[--no]; 116797524820SJanusz Dziedzic freq_range_tmp = &tmp->freq_range; 116897524820SJanusz Dziedzic 116997524820SJanusz Dziedzic if (freq_range_tmp->end_freq_khz < freq_range->start_freq_khz) 117097524820SJanusz Dziedzic break; 117197524820SJanusz Dziedzic 117297524820SJanusz Dziedzic freq_range = freq_range_tmp; 117397524820SJanusz Dziedzic } 117497524820SJanusz Dziedzic 117597524820SJanusz Dziedzic start_freq = freq_range->start_freq_khz; 117697524820SJanusz Dziedzic 117797524820SJanusz Dziedzic /* get end_freq */ 117897524820SJanusz Dziedzic freq_range = &rule->freq_range; 117997524820SJanusz Dziedzic no = idx; 118097524820SJanusz Dziedzic 118197524820SJanusz Dziedzic while (no < rd->n_reg_rules - 1) { 118297524820SJanusz Dziedzic tmp = &rd->reg_rules[++no]; 118397524820SJanusz Dziedzic freq_range_tmp = &tmp->freq_range; 118497524820SJanusz Dziedzic 118597524820SJanusz Dziedzic if (freq_range_tmp->start_freq_khz > freq_range->end_freq_khz) 118697524820SJanusz Dziedzic break; 118797524820SJanusz Dziedzic 118897524820SJanusz Dziedzic freq_range = freq_range_tmp; 118997524820SJanusz Dziedzic } 119097524820SJanusz Dziedzic 119197524820SJanusz Dziedzic end_freq = freq_range->end_freq_khz; 119297524820SJanusz Dziedzic 119397524820SJanusz Dziedzic return end_freq - start_freq; 119497524820SJanusz Dziedzic } 119597524820SJanusz Dziedzic 1196a6d4a534SArik Nemtsov unsigned int reg_get_max_bandwidth(const struct ieee80211_regdomain *rd, 1197a6d4a534SArik Nemtsov const struct ieee80211_reg_rule *rule) 1198a6d4a534SArik Nemtsov { 1199a6d4a534SArik Nemtsov unsigned int bw = reg_get_max_bandwidth_from_range(rd, rule); 1200a6d4a534SArik Nemtsov 1201a6d4a534SArik Nemtsov if (rule->flags & NL80211_RRF_NO_160MHZ) 1202a6d4a534SArik Nemtsov bw = min_t(unsigned int, bw, MHZ_TO_KHZ(80)); 1203a6d4a534SArik Nemtsov if (rule->flags & NL80211_RRF_NO_80MHZ) 1204a6d4a534SArik Nemtsov bw = min_t(unsigned int, bw, MHZ_TO_KHZ(40)); 1205a6d4a534SArik Nemtsov 1206a6d4a534SArik Nemtsov /* 1207a6d4a534SArik Nemtsov * HT40+/HT40- limits are handled per-channel. Only limit BW if both 1208a6d4a534SArik Nemtsov * are not allowed. 1209a6d4a534SArik Nemtsov */ 1210a6d4a534SArik Nemtsov if (rule->flags & NL80211_RRF_NO_HT40MINUS && 1211a6d4a534SArik Nemtsov rule->flags & NL80211_RRF_NO_HT40PLUS) 1212a6d4a534SArik Nemtsov bw = min_t(unsigned int, bw, MHZ_TO_KHZ(20)); 1213a6d4a534SArik Nemtsov 1214a6d4a534SArik Nemtsov return bw; 1215a6d4a534SArik Nemtsov } 1216a6d4a534SArik Nemtsov 1217b2e1b302SLuis R. Rodriguez /* Sanity check on a regulatory rule */ 1218a3d2eaf0SJohannes Berg static bool is_valid_reg_rule(const struct ieee80211_reg_rule *rule) 1219b2e1b302SLuis R. Rodriguez { 1220a3d2eaf0SJohannes Berg const struct ieee80211_freq_range *freq_range = &rule->freq_range; 1221b2e1b302SLuis R. Rodriguez u32 freq_diff; 1222b2e1b302SLuis R. Rodriguez 122391e99004SLuis R. Rodriguez if (freq_range->start_freq_khz <= 0 || freq_range->end_freq_khz <= 0) 1224b2e1b302SLuis R. Rodriguez return false; 1225b2e1b302SLuis R. Rodriguez 1226b2e1b302SLuis R. Rodriguez if (freq_range->start_freq_khz > freq_range->end_freq_khz) 1227b2e1b302SLuis R. Rodriguez return false; 1228b2e1b302SLuis R. Rodriguez 1229b2e1b302SLuis R. Rodriguez freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz; 1230b2e1b302SLuis R. Rodriguez 1231bd05f28eSRoel Kluin if (freq_range->end_freq_khz <= freq_range->start_freq_khz || 1232bd05f28eSRoel Kluin freq_range->max_bandwidth_khz > freq_diff) 1233b2e1b302SLuis R. Rodriguez return false; 1234b2e1b302SLuis R. Rodriguez 1235b2e1b302SLuis R. Rodriguez return true; 1236b2e1b302SLuis R. Rodriguez } 1237b2e1b302SLuis R. Rodriguez 1238a3d2eaf0SJohannes Berg static bool is_valid_rd(const struct ieee80211_regdomain *rd) 1239b2e1b302SLuis R. Rodriguez { 1240a3d2eaf0SJohannes Berg const struct ieee80211_reg_rule *reg_rule = NULL; 1241b2e1b302SLuis R. Rodriguez unsigned int i; 1242b2e1b302SLuis R. Rodriguez 1243b2e1b302SLuis R. Rodriguez if (!rd->n_reg_rules) 1244b2e1b302SLuis R. Rodriguez return false; 1245b2e1b302SLuis R. Rodriguez 124688dc1c3fSLuis R. Rodriguez if (WARN_ON(rd->n_reg_rules > NL80211_MAX_SUPP_REG_RULES)) 124788dc1c3fSLuis R. Rodriguez return false; 124888dc1c3fSLuis R. Rodriguez 1249b2e1b302SLuis R. Rodriguez for (i = 0; i < rd->n_reg_rules; i++) { 1250b2e1b302SLuis R. Rodriguez reg_rule = &rd->reg_rules[i]; 1251b2e1b302SLuis R. Rodriguez if (!is_valid_reg_rule(reg_rule)) 1252b2e1b302SLuis R. Rodriguez return false; 1253b2e1b302SLuis R. Rodriguez } 1254b2e1b302SLuis R. Rodriguez 1255b2e1b302SLuis R. Rodriguez return true; 1256b2e1b302SLuis R. Rodriguez } 1257b2e1b302SLuis R. Rodriguez 12580c7dc45dSLuis R. Rodriguez /** 12590c7dc45dSLuis R. Rodriguez * freq_in_rule_band - tells us if a frequency is in a frequency band 12600c7dc45dSLuis R. Rodriguez * @freq_range: frequency rule we want to query 12610c7dc45dSLuis R. Rodriguez * @freq_khz: frequency we are inquiring about 12620c7dc45dSLuis R. Rodriguez * 12630c7dc45dSLuis R. Rodriguez * This lets us know if a specific frequency rule is or is not relevant to 12640c7dc45dSLuis R. Rodriguez * a specific frequency's band. Bands are device specific and artificial 126564629b9dSVladimir Kondratiev * definitions (the "2.4 GHz band", the "5 GHz band" and the "60GHz band"), 126664629b9dSVladimir Kondratiev * however it is safe for now to assume that a frequency rule should not be 126764629b9dSVladimir Kondratiev * part of a frequency's band if the start freq or end freq are off by more 126893183bdbSChaitanya Tata * than 2 GHz for the 2.4 and 5 GHz bands, and by more than 20 GHz for the 126964629b9dSVladimir Kondratiev * 60 GHz band. 12700c7dc45dSLuis R. Rodriguez * This resolution can be lowered and should be considered as we add 12710c7dc45dSLuis R. Rodriguez * regulatory rule support for other "bands". 12720c7dc45dSLuis R. Rodriguez **/ 12730c7dc45dSLuis R. Rodriguez static bool freq_in_rule_band(const struct ieee80211_freq_range *freq_range, 12740c7dc45dSLuis R. Rodriguez u32 freq_khz) 12750c7dc45dSLuis R. Rodriguez { 12760c7dc45dSLuis R. Rodriguez #define ONE_GHZ_IN_KHZ 1000000 127764629b9dSVladimir Kondratiev /* 127864629b9dSVladimir Kondratiev * From 802.11ad: directional multi-gigabit (DMG): 127964629b9dSVladimir Kondratiev * Pertaining to operation in a frequency band containing a channel 128064629b9dSVladimir Kondratiev * with the Channel starting frequency above 45 GHz. 128164629b9dSVladimir Kondratiev */ 128264629b9dSVladimir Kondratiev u32 limit = freq_khz > 45 * ONE_GHZ_IN_KHZ ? 128393183bdbSChaitanya Tata 20 * ONE_GHZ_IN_KHZ : 2 * ONE_GHZ_IN_KHZ; 128464629b9dSVladimir Kondratiev if (abs(freq_khz - freq_range->start_freq_khz) <= limit) 12850c7dc45dSLuis R. Rodriguez return true; 128664629b9dSVladimir Kondratiev if (abs(freq_khz - freq_range->end_freq_khz) <= limit) 12870c7dc45dSLuis R. Rodriguez return true; 12880c7dc45dSLuis R. Rodriguez return false; 12890c7dc45dSLuis R. Rodriguez #undef ONE_GHZ_IN_KHZ 12900c7dc45dSLuis R. Rodriguez } 12910c7dc45dSLuis R. Rodriguez 1292fb1fc7adSLuis R. Rodriguez /* 1293adbfb058SLuis R. Rodriguez * Later on we can perhaps use the more restrictive DFS 1294adbfb058SLuis R. Rodriguez * region but we don't have information for that yet so 1295adbfb058SLuis R. Rodriguez * for now simply disallow conflicts. 1296adbfb058SLuis R. Rodriguez */ 1297adbfb058SLuis R. Rodriguez static enum nl80211_dfs_regions 1298adbfb058SLuis R. Rodriguez reg_intersect_dfs_region(const enum nl80211_dfs_regions dfs_region1, 1299adbfb058SLuis R. Rodriguez const enum nl80211_dfs_regions dfs_region2) 1300adbfb058SLuis R. Rodriguez { 1301adbfb058SLuis R. Rodriguez if (dfs_region1 != dfs_region2) 1302adbfb058SLuis R. Rodriguez return NL80211_DFS_UNSET; 1303adbfb058SLuis R. Rodriguez return dfs_region1; 1304adbfb058SLuis R. Rodriguez } 1305adbfb058SLuis R. Rodriguez 130608a75a88SIlan Peer static void reg_wmm_rules_intersect(const struct ieee80211_wmm_ac *wmm_ac1, 130708a75a88SIlan Peer const struct ieee80211_wmm_ac *wmm_ac2, 130808a75a88SIlan Peer struct ieee80211_wmm_ac *intersect) 130908a75a88SIlan Peer { 131008a75a88SIlan Peer intersect->cw_min = max_t(u16, wmm_ac1->cw_min, wmm_ac2->cw_min); 131108a75a88SIlan Peer intersect->cw_max = max_t(u16, wmm_ac1->cw_max, wmm_ac2->cw_max); 131208a75a88SIlan Peer intersect->cot = min_t(u16, wmm_ac1->cot, wmm_ac2->cot); 131308a75a88SIlan Peer intersect->aifsn = max_t(u8, wmm_ac1->aifsn, wmm_ac2->aifsn); 131408a75a88SIlan Peer } 131508a75a88SIlan Peer 1316adbfb058SLuis R. Rodriguez /* 1317fb1fc7adSLuis R. Rodriguez * Helper for regdom_intersect(), this does the real 1318fb1fc7adSLuis R. Rodriguez * mathematical intersection fun 1319fb1fc7adSLuis R. Rodriguez */ 132097524820SJanusz Dziedzic static int reg_rules_intersect(const struct ieee80211_regdomain *rd1, 132197524820SJanusz Dziedzic const struct ieee80211_regdomain *rd2, 132297524820SJanusz Dziedzic const struct ieee80211_reg_rule *rule1, 13239c96477dSLuis R. Rodriguez const struct ieee80211_reg_rule *rule2, 13249c96477dSLuis R. Rodriguez struct ieee80211_reg_rule *intersected_rule) 13259c96477dSLuis R. Rodriguez { 13269c96477dSLuis R. Rodriguez const struct ieee80211_freq_range *freq_range1, *freq_range2; 13279c96477dSLuis R. Rodriguez struct ieee80211_freq_range *freq_range; 13289c96477dSLuis R. Rodriguez const struct ieee80211_power_rule *power_rule1, *power_rule2; 13299c96477dSLuis R. Rodriguez struct ieee80211_power_rule *power_rule; 133008a75a88SIlan Peer const struct ieee80211_wmm_rule *wmm_rule1, *wmm_rule2; 133108a75a88SIlan Peer struct ieee80211_wmm_rule *wmm_rule; 133297524820SJanusz Dziedzic u32 freq_diff, max_bandwidth1, max_bandwidth2; 13339c96477dSLuis R. Rodriguez 13349c96477dSLuis R. Rodriguez freq_range1 = &rule1->freq_range; 13359c96477dSLuis R. Rodriguez freq_range2 = &rule2->freq_range; 13369c96477dSLuis R. Rodriguez freq_range = &intersected_rule->freq_range; 13379c96477dSLuis R. Rodriguez 13389c96477dSLuis R. Rodriguez power_rule1 = &rule1->power_rule; 13399c96477dSLuis R. Rodriguez power_rule2 = &rule2->power_rule; 13409c96477dSLuis R. Rodriguez power_rule = &intersected_rule->power_rule; 13419c96477dSLuis R. Rodriguez 134208a75a88SIlan Peer wmm_rule1 = &rule1->wmm_rule; 134308a75a88SIlan Peer wmm_rule2 = &rule2->wmm_rule; 134408a75a88SIlan Peer wmm_rule = &intersected_rule->wmm_rule; 134508a75a88SIlan Peer 13469c96477dSLuis R. Rodriguez freq_range->start_freq_khz = max(freq_range1->start_freq_khz, 13479c96477dSLuis R. Rodriguez freq_range2->start_freq_khz); 13489c96477dSLuis R. Rodriguez freq_range->end_freq_khz = min(freq_range1->end_freq_khz, 13499c96477dSLuis R. Rodriguez freq_range2->end_freq_khz); 135097524820SJanusz Dziedzic 135197524820SJanusz Dziedzic max_bandwidth1 = freq_range1->max_bandwidth_khz; 135297524820SJanusz Dziedzic max_bandwidth2 = freq_range2->max_bandwidth_khz; 135397524820SJanusz Dziedzic 1354b0dfd2eaSJanusz Dziedzic if (rule1->flags & NL80211_RRF_AUTO_BW) 135597524820SJanusz Dziedzic max_bandwidth1 = reg_get_max_bandwidth(rd1, rule1); 1356b0dfd2eaSJanusz Dziedzic if (rule2->flags & NL80211_RRF_AUTO_BW) 135797524820SJanusz Dziedzic max_bandwidth2 = reg_get_max_bandwidth(rd2, rule2); 135897524820SJanusz Dziedzic 135997524820SJanusz Dziedzic freq_range->max_bandwidth_khz = min(max_bandwidth1, max_bandwidth2); 13609c96477dSLuis R. Rodriguez 1361b0dfd2eaSJanusz Dziedzic intersected_rule->flags = rule1->flags | rule2->flags; 1362b0dfd2eaSJanusz Dziedzic 1363b0dfd2eaSJanusz Dziedzic /* 1364b0dfd2eaSJanusz Dziedzic * In case NL80211_RRF_AUTO_BW requested for both rules 1365b0dfd2eaSJanusz Dziedzic * set AUTO_BW in intersected rule also. Next we will 1366b0dfd2eaSJanusz Dziedzic * calculate BW correctly in handle_channel function. 1367b0dfd2eaSJanusz Dziedzic * In other case remove AUTO_BW flag while we calculate 1368b0dfd2eaSJanusz Dziedzic * maximum bandwidth correctly and auto calculation is 1369b0dfd2eaSJanusz Dziedzic * not required. 1370b0dfd2eaSJanusz Dziedzic */ 1371b0dfd2eaSJanusz Dziedzic if ((rule1->flags & NL80211_RRF_AUTO_BW) && 1372b0dfd2eaSJanusz Dziedzic (rule2->flags & NL80211_RRF_AUTO_BW)) 1373b0dfd2eaSJanusz Dziedzic intersected_rule->flags |= NL80211_RRF_AUTO_BW; 1374b0dfd2eaSJanusz Dziedzic else 1375b0dfd2eaSJanusz Dziedzic intersected_rule->flags &= ~NL80211_RRF_AUTO_BW; 1376b0dfd2eaSJanusz Dziedzic 13779c96477dSLuis R. Rodriguez freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz; 13789c96477dSLuis R. Rodriguez if (freq_range->max_bandwidth_khz > freq_diff) 13799c96477dSLuis R. Rodriguez freq_range->max_bandwidth_khz = freq_diff; 13809c96477dSLuis R. Rodriguez 13819c96477dSLuis R. Rodriguez power_rule->max_eirp = min(power_rule1->max_eirp, 13829c96477dSLuis R. Rodriguez power_rule2->max_eirp); 13839c96477dSLuis R. Rodriguez power_rule->max_antenna_gain = min(power_rule1->max_antenna_gain, 13849c96477dSLuis R. Rodriguez power_rule2->max_antenna_gain); 13859c96477dSLuis R. Rodriguez 1386089027e5SJanusz Dziedzic intersected_rule->dfs_cac_ms = max(rule1->dfs_cac_ms, 1387089027e5SJanusz Dziedzic rule2->dfs_cac_ms); 1388089027e5SJanusz Dziedzic 138908a75a88SIlan Peer if (rule1->has_wmm && rule2->has_wmm) { 139008a75a88SIlan Peer u8 ac; 139108a75a88SIlan Peer 139208a75a88SIlan Peer for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 139308a75a88SIlan Peer reg_wmm_rules_intersect(&wmm_rule1->client[ac], 139408a75a88SIlan Peer &wmm_rule2->client[ac], 139508a75a88SIlan Peer &wmm_rule->client[ac]); 139608a75a88SIlan Peer reg_wmm_rules_intersect(&wmm_rule1->ap[ac], 139708a75a88SIlan Peer &wmm_rule2->ap[ac], 139808a75a88SIlan Peer &wmm_rule->ap[ac]); 139908a75a88SIlan Peer } 140008a75a88SIlan Peer 140108a75a88SIlan Peer intersected_rule->has_wmm = true; 140208a75a88SIlan Peer } else if (rule1->has_wmm) { 140308a75a88SIlan Peer *wmm_rule = *wmm_rule1; 140408a75a88SIlan Peer intersected_rule->has_wmm = true; 140508a75a88SIlan Peer } else if (rule2->has_wmm) { 140608a75a88SIlan Peer *wmm_rule = *wmm_rule2; 140708a75a88SIlan Peer intersected_rule->has_wmm = true; 140808a75a88SIlan Peer } else { 140908a75a88SIlan Peer intersected_rule->has_wmm = false; 141008a75a88SIlan Peer } 141108a75a88SIlan Peer 14129c96477dSLuis R. Rodriguez if (!is_valid_reg_rule(intersected_rule)) 14139c96477dSLuis R. Rodriguez return -EINVAL; 14149c96477dSLuis R. Rodriguez 14159c96477dSLuis R. Rodriguez return 0; 14169c96477dSLuis R. Rodriguez } 14179c96477dSLuis R. Rodriguez 1418a62a1aedSEliad Peller /* check whether old rule contains new rule */ 1419a62a1aedSEliad Peller static bool rule_contains(struct ieee80211_reg_rule *r1, 1420a62a1aedSEliad Peller struct ieee80211_reg_rule *r2) 1421a62a1aedSEliad Peller { 1422a62a1aedSEliad Peller /* for simplicity, currently consider only same flags */ 1423a62a1aedSEliad Peller if (r1->flags != r2->flags) 1424a62a1aedSEliad Peller return false; 1425a62a1aedSEliad Peller 1426a62a1aedSEliad Peller /* verify r1 is more restrictive */ 1427a62a1aedSEliad Peller if ((r1->power_rule.max_antenna_gain > 1428a62a1aedSEliad Peller r2->power_rule.max_antenna_gain) || 1429a62a1aedSEliad Peller r1->power_rule.max_eirp > r2->power_rule.max_eirp) 1430a62a1aedSEliad Peller return false; 1431a62a1aedSEliad Peller 1432a62a1aedSEliad Peller /* make sure r2's range is contained within r1 */ 1433a62a1aedSEliad Peller if (r1->freq_range.start_freq_khz > r2->freq_range.start_freq_khz || 1434a62a1aedSEliad Peller r1->freq_range.end_freq_khz < r2->freq_range.end_freq_khz) 1435a62a1aedSEliad Peller return false; 1436a62a1aedSEliad Peller 1437a62a1aedSEliad Peller /* and finally verify that r1.max_bw >= r2.max_bw */ 1438a62a1aedSEliad Peller if (r1->freq_range.max_bandwidth_khz < 1439a62a1aedSEliad Peller r2->freq_range.max_bandwidth_khz) 1440a62a1aedSEliad Peller return false; 1441a62a1aedSEliad Peller 1442a62a1aedSEliad Peller return true; 1443a62a1aedSEliad Peller } 1444a62a1aedSEliad Peller 1445a62a1aedSEliad Peller /* add or extend current rules. do nothing if rule is already contained */ 1446a62a1aedSEliad Peller static void add_rule(struct ieee80211_reg_rule *rule, 1447a62a1aedSEliad Peller struct ieee80211_reg_rule *reg_rules, u32 *n_rules) 1448a62a1aedSEliad Peller { 1449a62a1aedSEliad Peller struct ieee80211_reg_rule *tmp_rule; 1450a62a1aedSEliad Peller int i; 1451a62a1aedSEliad Peller 1452a62a1aedSEliad Peller for (i = 0; i < *n_rules; i++) { 1453a62a1aedSEliad Peller tmp_rule = ®_rules[i]; 1454a62a1aedSEliad Peller /* rule is already contained - do nothing */ 1455a62a1aedSEliad Peller if (rule_contains(tmp_rule, rule)) 1456a62a1aedSEliad Peller return; 1457a62a1aedSEliad Peller 1458a62a1aedSEliad Peller /* extend rule if possible */ 1459a62a1aedSEliad Peller if (rule_contains(rule, tmp_rule)) { 1460a62a1aedSEliad Peller memcpy(tmp_rule, rule, sizeof(*rule)); 1461a62a1aedSEliad Peller return; 1462a62a1aedSEliad Peller } 1463a62a1aedSEliad Peller } 1464a62a1aedSEliad Peller 1465a62a1aedSEliad Peller memcpy(®_rules[*n_rules], rule, sizeof(*rule)); 1466a62a1aedSEliad Peller (*n_rules)++; 1467a62a1aedSEliad Peller } 1468a62a1aedSEliad Peller 14699c96477dSLuis R. Rodriguez /** 14709c96477dSLuis R. Rodriguez * regdom_intersect - do the intersection between two regulatory domains 14719c96477dSLuis R. Rodriguez * @rd1: first regulatory domain 14729c96477dSLuis R. Rodriguez * @rd2: second regulatory domain 14739c96477dSLuis R. Rodriguez * 14749c96477dSLuis R. Rodriguez * Use this function to get the intersection between two regulatory domains. 14759c96477dSLuis R. Rodriguez * Once completed we will mark the alpha2 for the rd as intersected, "98", 14769c96477dSLuis R. Rodriguez * as no one single alpha2 can represent this regulatory domain. 14779c96477dSLuis R. Rodriguez * 14789c96477dSLuis R. Rodriguez * Returns a pointer to the regulatory domain structure which will hold the 14799c96477dSLuis R. Rodriguez * resulting intersection of rules between rd1 and rd2. We will 14809c96477dSLuis R. Rodriguez * kzalloc() this structure for you. 14819c96477dSLuis R. Rodriguez */ 14821a919318SJohannes Berg static struct ieee80211_regdomain * 14831a919318SJohannes Berg regdom_intersect(const struct ieee80211_regdomain *rd1, 14849c96477dSLuis R. Rodriguez const struct ieee80211_regdomain *rd2) 14859c96477dSLuis R. Rodriguez { 14869f8c7136SGustavo A. R. Silva int r; 14879c96477dSLuis R. Rodriguez unsigned int x, y; 1488a62a1aedSEliad Peller unsigned int num_rules = 0; 14899c96477dSLuis R. Rodriguez const struct ieee80211_reg_rule *rule1, *rule2; 1490a62a1aedSEliad Peller struct ieee80211_reg_rule intersected_rule; 14919c96477dSLuis R. Rodriguez struct ieee80211_regdomain *rd; 14929c96477dSLuis R. Rodriguez 14939c96477dSLuis R. Rodriguez if (!rd1 || !rd2) 14949c96477dSLuis R. Rodriguez return NULL; 14959c96477dSLuis R. Rodriguez 1496fb1fc7adSLuis R. Rodriguez /* 1497fb1fc7adSLuis R. Rodriguez * First we get a count of the rules we'll need, then we actually 14989c96477dSLuis R. Rodriguez * build them. This is to so we can malloc() and free() a 14999c96477dSLuis R. Rodriguez * regdomain once. The reason we use reg_rules_intersect() here 15009c96477dSLuis R. Rodriguez * is it will return -EINVAL if the rule computed makes no sense. 1501fb1fc7adSLuis R. Rodriguez * All rules that do check out OK are valid. 1502fb1fc7adSLuis R. Rodriguez */ 15039c96477dSLuis R. Rodriguez 15049c96477dSLuis R. Rodriguez for (x = 0; x < rd1->n_reg_rules; x++) { 15059c96477dSLuis R. Rodriguez rule1 = &rd1->reg_rules[x]; 15069c96477dSLuis R. Rodriguez for (y = 0; y < rd2->n_reg_rules; y++) { 15079c96477dSLuis R. Rodriguez rule2 = &rd2->reg_rules[y]; 150897524820SJanusz Dziedzic if (!reg_rules_intersect(rd1, rd2, rule1, rule2, 1509a62a1aedSEliad Peller &intersected_rule)) 15109c96477dSLuis R. Rodriguez num_rules++; 15119c96477dSLuis R. Rodriguez } 15129c96477dSLuis R. Rodriguez } 15139c96477dSLuis R. Rodriguez 15149c96477dSLuis R. Rodriguez if (!num_rules) 15159c96477dSLuis R. Rodriguez return NULL; 15169c96477dSLuis R. Rodriguez 15179f8c7136SGustavo A. R. Silva rd = kzalloc(struct_size(rd, reg_rules, num_rules), GFP_KERNEL); 15189c96477dSLuis R. Rodriguez if (!rd) 15199c96477dSLuis R. Rodriguez return NULL; 15209c96477dSLuis R. Rodriguez 1521a62a1aedSEliad Peller for (x = 0; x < rd1->n_reg_rules; x++) { 15229c96477dSLuis R. Rodriguez rule1 = &rd1->reg_rules[x]; 1523a62a1aedSEliad Peller for (y = 0; y < rd2->n_reg_rules; y++) { 15249c96477dSLuis R. Rodriguez rule2 = &rd2->reg_rules[y]; 152597524820SJanusz Dziedzic r = reg_rules_intersect(rd1, rd2, rule1, rule2, 1526a62a1aedSEliad Peller &intersected_rule); 1527fb1fc7adSLuis R. Rodriguez /* 1528fb1fc7adSLuis R. Rodriguez * No need to memset here the intersected rule here as 1529fb1fc7adSLuis R. Rodriguez * we're not using the stack anymore 1530fb1fc7adSLuis R. Rodriguez */ 15319c96477dSLuis R. Rodriguez if (r) 15329c96477dSLuis R. Rodriguez continue; 1533a62a1aedSEliad Peller 1534a62a1aedSEliad Peller add_rule(&intersected_rule, rd->reg_rules, 1535a62a1aedSEliad Peller &rd->n_reg_rules); 15369c96477dSLuis R. Rodriguez } 15379c96477dSLuis R. Rodriguez } 15389c96477dSLuis R. Rodriguez 15399c96477dSLuis R. Rodriguez rd->alpha2[0] = '9'; 15409c96477dSLuis R. Rodriguez rd->alpha2[1] = '8'; 1541adbfb058SLuis R. Rodriguez rd->dfs_region = reg_intersect_dfs_region(rd1->dfs_region, 1542adbfb058SLuis R. Rodriguez rd2->dfs_region); 15439c96477dSLuis R. Rodriguez 15449c96477dSLuis R. Rodriguez return rd; 15459c96477dSLuis R. Rodriguez } 15469c96477dSLuis R. Rodriguez 1547fb1fc7adSLuis R. Rodriguez /* 1548fb1fc7adSLuis R. Rodriguez * XXX: add support for the rest of enum nl80211_reg_rule_flags, we may 1549fb1fc7adSLuis R. Rodriguez * want to just have the channel structure use these 1550fb1fc7adSLuis R. Rodriguez */ 1551b2e1b302SLuis R. Rodriguez static u32 map_regdom_flags(u32 rd_flags) 1552b2e1b302SLuis R. Rodriguez { 1553b2e1b302SLuis R. Rodriguez u32 channel_flags = 0; 15548fe02e16SLuis R. Rodriguez if (rd_flags & NL80211_RRF_NO_IR_ALL) 15558fe02e16SLuis R. Rodriguez channel_flags |= IEEE80211_CHAN_NO_IR; 1556b2e1b302SLuis R. Rodriguez if (rd_flags & NL80211_RRF_DFS) 1557b2e1b302SLuis R. Rodriguez channel_flags |= IEEE80211_CHAN_RADAR; 155803f6b084SSeth Forshee if (rd_flags & NL80211_RRF_NO_OFDM) 155903f6b084SSeth Forshee channel_flags |= IEEE80211_CHAN_NO_OFDM; 1560570dbde1SDavid Spinadel if (rd_flags & NL80211_RRF_NO_OUTDOOR) 1561570dbde1SDavid Spinadel channel_flags |= IEEE80211_CHAN_INDOOR_ONLY; 156206f207fcSArik Nemtsov if (rd_flags & NL80211_RRF_IR_CONCURRENT) 156306f207fcSArik Nemtsov channel_flags |= IEEE80211_CHAN_IR_CONCURRENT; 1564a6d4a534SArik Nemtsov if (rd_flags & NL80211_RRF_NO_HT40MINUS) 1565a6d4a534SArik Nemtsov channel_flags |= IEEE80211_CHAN_NO_HT40MINUS; 1566a6d4a534SArik Nemtsov if (rd_flags & NL80211_RRF_NO_HT40PLUS) 1567a6d4a534SArik Nemtsov channel_flags |= IEEE80211_CHAN_NO_HT40PLUS; 1568a6d4a534SArik Nemtsov if (rd_flags & NL80211_RRF_NO_80MHZ) 1569a6d4a534SArik Nemtsov channel_flags |= IEEE80211_CHAN_NO_80MHZ; 1570a6d4a534SArik Nemtsov if (rd_flags & NL80211_RRF_NO_160MHZ) 1571a6d4a534SArik Nemtsov channel_flags |= IEEE80211_CHAN_NO_160MHZ; 1572b2e1b302SLuis R. Rodriguez return channel_flags; 1573b2e1b302SLuis R. Rodriguez } 1574b2e1b302SLuis R. Rodriguez 1575361c9c8bSJohannes Berg static const struct ieee80211_reg_rule * 157649172874SMichal Sojka freq_reg_info_regd(u32 center_freq, 15774edd5698SMatthias May const struct ieee80211_regdomain *regd, u32 bw) 15788318d78aSJohannes Berg { 15798318d78aSJohannes Berg int i; 15800c7dc45dSLuis R. Rodriguez bool band_rule_found = false; 1581038659e7SLuis R. Rodriguez bool bw_fits = false; 1582038659e7SLuis R. Rodriguez 15833e0c3ff3SLuis R. Rodriguez if (!regd) 1584361c9c8bSJohannes Berg return ERR_PTR(-EINVAL); 1585b2e1b302SLuis R. Rodriguez 15863e0c3ff3SLuis R. Rodriguez for (i = 0; i < regd->n_reg_rules; i++) { 1587b2e1b302SLuis R. Rodriguez const struct ieee80211_reg_rule *rr; 1588b2e1b302SLuis R. Rodriguez const struct ieee80211_freq_range *fr = NULL; 1589b2e1b302SLuis R. Rodriguez 15903e0c3ff3SLuis R. Rodriguez rr = ®d->reg_rules[i]; 1591b2e1b302SLuis R. Rodriguez fr = &rr->freq_range; 15920c7dc45dSLuis R. Rodriguez 1593fb1fc7adSLuis R. Rodriguez /* 1594fb1fc7adSLuis R. Rodriguez * We only need to know if one frequency rule was 15950c7dc45dSLuis R. Rodriguez * was in center_freq's band, that's enough, so lets 1596fb1fc7adSLuis R. Rodriguez * not overwrite it once found 1597fb1fc7adSLuis R. Rodriguez */ 15980c7dc45dSLuis R. Rodriguez if (!band_rule_found) 15990c7dc45dSLuis R. Rodriguez band_rule_found = freq_in_rule_band(fr, center_freq); 16000c7dc45dSLuis R. Rodriguez 16014787cfa0SRafał Miłecki bw_fits = cfg80211_does_bw_fit_range(fr, center_freq, bw); 16020c7dc45dSLuis R. Rodriguez 1603361c9c8bSJohannes Berg if (band_rule_found && bw_fits) 1604361c9c8bSJohannes Berg return rr; 16058318d78aSJohannes Berg } 16068318d78aSJohannes Berg 16070c7dc45dSLuis R. Rodriguez if (!band_rule_found) 1608361c9c8bSJohannes Berg return ERR_PTR(-ERANGE); 16090c7dc45dSLuis R. Rodriguez 1610361c9c8bSJohannes Berg return ERR_PTR(-EINVAL); 1611b2e1b302SLuis R. Rodriguez } 1612b2e1b302SLuis R. Rodriguez 16138de1c63bSJohannes Berg static const struct ieee80211_reg_rule * 16148de1c63bSJohannes Berg __freq_reg_info(struct wiphy *wiphy, u32 center_freq, u32 min_bw) 16154edd5698SMatthias May { 16164edd5698SMatthias May const struct ieee80211_regdomain *regd = reg_get_regdomain(wiphy); 16174edd5698SMatthias May const struct ieee80211_reg_rule *reg_rule = NULL; 16184edd5698SMatthias May u32 bw; 16194edd5698SMatthias May 16204edd5698SMatthias May for (bw = MHZ_TO_KHZ(20); bw >= min_bw; bw = bw / 2) { 162149172874SMichal Sojka reg_rule = freq_reg_info_regd(center_freq, regd, bw); 16224edd5698SMatthias May if (!IS_ERR(reg_rule)) 16234edd5698SMatthias May return reg_rule; 16244edd5698SMatthias May } 16254edd5698SMatthias May 16264edd5698SMatthias May return reg_rule; 16274edd5698SMatthias May } 16284edd5698SMatthias May 1629361c9c8bSJohannes Berg const struct ieee80211_reg_rule *freq_reg_info(struct wiphy *wiphy, 1630361c9c8bSJohannes Berg u32 center_freq) 16311fa25e41SLuis R. Rodriguez { 16324edd5698SMatthias May return __freq_reg_info(wiphy, center_freq, MHZ_TO_KHZ(20)); 16331fa25e41SLuis R. Rodriguez } 16344f366c5dSJohn W. Linville EXPORT_SYMBOL(freq_reg_info); 1635b2e1b302SLuis R. Rodriguez 1636034c6d6eSLuis R. Rodriguez const char *reg_initiator_name(enum nl80211_reg_initiator initiator) 1637926a0a09SLuis R. Rodriguez { 1638926a0a09SLuis R. Rodriguez switch (initiator) { 1639926a0a09SLuis R. Rodriguez case NL80211_REGDOM_SET_BY_CORE: 1640034c6d6eSLuis R. Rodriguez return "core"; 1641926a0a09SLuis R. Rodriguez case NL80211_REGDOM_SET_BY_USER: 1642034c6d6eSLuis R. Rodriguez return "user"; 1643926a0a09SLuis R. Rodriguez case NL80211_REGDOM_SET_BY_DRIVER: 1644034c6d6eSLuis R. Rodriguez return "driver"; 1645926a0a09SLuis R. Rodriguez case NL80211_REGDOM_SET_BY_COUNTRY_IE: 16468db0c433SToke Høiland-Jørgensen return "country element"; 1647926a0a09SLuis R. Rodriguez default: 1648926a0a09SLuis R. Rodriguez WARN_ON(1); 1649034c6d6eSLuis R. Rodriguez return "bug"; 1650926a0a09SLuis R. Rodriguez } 1651926a0a09SLuis R. Rodriguez } 1652034c6d6eSLuis R. Rodriguez EXPORT_SYMBOL(reg_initiator_name); 1653e702d3cfSLuis R. Rodriguez 16541aeb135fSMichal Sojka static uint32_t reg_rule_to_chan_bw_flags(const struct ieee80211_regdomain *regd, 16551aeb135fSMichal Sojka const struct ieee80211_reg_rule *reg_rule, 16561aeb135fSMichal Sojka const struct ieee80211_channel *chan) 16571aeb135fSMichal Sojka { 16581aeb135fSMichal Sojka const struct ieee80211_freq_range *freq_range = NULL; 16591aeb135fSMichal Sojka u32 max_bandwidth_khz, bw_flags = 0; 16601aeb135fSMichal Sojka 16611aeb135fSMichal Sojka freq_range = ®_rule->freq_range; 16621aeb135fSMichal Sojka 16631aeb135fSMichal Sojka max_bandwidth_khz = freq_range->max_bandwidth_khz; 16641aeb135fSMichal Sojka /* Check if auto calculation requested */ 16651aeb135fSMichal Sojka if (reg_rule->flags & NL80211_RRF_AUTO_BW) 16661aeb135fSMichal Sojka max_bandwidth_khz = reg_get_max_bandwidth(regd, reg_rule); 16671aeb135fSMichal Sojka 16681aeb135fSMichal Sojka /* If we get a reg_rule we can assume that at least 5Mhz fit */ 16694787cfa0SRafał Miłecki if (!cfg80211_does_bw_fit_range(freq_range, 16704787cfa0SRafał Miłecki MHZ_TO_KHZ(chan->center_freq), 16711aeb135fSMichal Sojka MHZ_TO_KHZ(10))) 16721aeb135fSMichal Sojka bw_flags |= IEEE80211_CHAN_NO_10MHZ; 16734787cfa0SRafał Miłecki if (!cfg80211_does_bw_fit_range(freq_range, 16744787cfa0SRafał Miłecki MHZ_TO_KHZ(chan->center_freq), 16751aeb135fSMichal Sojka MHZ_TO_KHZ(20))) 16761aeb135fSMichal Sojka bw_flags |= IEEE80211_CHAN_NO_20MHZ; 16771aeb135fSMichal Sojka 16781aeb135fSMichal Sojka if (max_bandwidth_khz < MHZ_TO_KHZ(10)) 16791aeb135fSMichal Sojka bw_flags |= IEEE80211_CHAN_NO_10MHZ; 16801aeb135fSMichal Sojka if (max_bandwidth_khz < MHZ_TO_KHZ(20)) 16811aeb135fSMichal Sojka bw_flags |= IEEE80211_CHAN_NO_20MHZ; 16821aeb135fSMichal Sojka if (max_bandwidth_khz < MHZ_TO_KHZ(40)) 16831aeb135fSMichal Sojka bw_flags |= IEEE80211_CHAN_NO_HT40; 16841aeb135fSMichal Sojka if (max_bandwidth_khz < MHZ_TO_KHZ(80)) 16851aeb135fSMichal Sojka bw_flags |= IEEE80211_CHAN_NO_80MHZ; 16861aeb135fSMichal Sojka if (max_bandwidth_khz < MHZ_TO_KHZ(160)) 16871aeb135fSMichal Sojka bw_flags |= IEEE80211_CHAN_NO_160MHZ; 16881aeb135fSMichal Sojka return bw_flags; 16891aeb135fSMichal Sojka } 16901aeb135fSMichal Sojka 1691e33e2241SJohannes Berg /* 1692e33e2241SJohannes Berg * Note that right now we assume the desired channel bandwidth 1693e33e2241SJohannes Berg * is always 20 MHz for each individual channel (HT40 uses 20 MHz 1694e33e2241SJohannes Berg * per channel, the primary and the extension channel). 1695038659e7SLuis R. Rodriguez */ 16967ca43d03SLuis R. Rodriguez static void handle_channel(struct wiphy *wiphy, 16977ca43d03SLuis R. Rodriguez enum nl80211_reg_initiator initiator, 1698fdc9d7b2SJohannes Berg struct ieee80211_channel *chan) 1699b2e1b302SLuis R. Rodriguez { 1700038659e7SLuis R. Rodriguez u32 flags, bw_flags = 0; 1701b2e1b302SLuis R. Rodriguez const struct ieee80211_reg_rule *reg_rule = NULL; 1702b2e1b302SLuis R. Rodriguez const struct ieee80211_power_rule *power_rule = NULL; 1703fe33eb39SLuis R. Rodriguez struct wiphy *request_wiphy = NULL; 1704c492db37SJohannes Berg struct regulatory_request *lr = get_last_request(); 170597524820SJanusz Dziedzic const struct ieee80211_regdomain *regd; 1706a92a3ce7SLuis R. Rodriguez 1707c492db37SJohannes Berg request_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx); 1708a92a3ce7SLuis R. Rodriguez 1709a92a3ce7SLuis R. Rodriguez flags = chan->orig_flags; 1710b2e1b302SLuis R. Rodriguez 1711361c9c8bSJohannes Berg reg_rule = freq_reg_info(wiphy, MHZ_TO_KHZ(chan->center_freq)); 1712361c9c8bSJohannes Berg if (IS_ERR(reg_rule)) { 1713ca4ffe8fSLuis R. Rodriguez /* 1714ca4ffe8fSLuis R. Rodriguez * We will disable all channels that do not match our 171525985edcSLucas De Marchi * received regulatory rule unless the hint is coming 1716ca4ffe8fSLuis R. Rodriguez * from a Country IE and the Country IE had no information 1717ca4ffe8fSLuis R. Rodriguez * about a band. The IEEE 802.11 spec allows for an AP 1718ca4ffe8fSLuis R. Rodriguez * to send only a subset of the regulatory rules allowed, 1719ca4ffe8fSLuis R. Rodriguez * so an AP in the US that only supports 2.4 GHz may only send 1720ca4ffe8fSLuis R. Rodriguez * a country IE with information for the 2.4 GHz band 1721ca4ffe8fSLuis R. Rodriguez * while 5 GHz is still supported. 1722ca4ffe8fSLuis R. Rodriguez */ 1723ca4ffe8fSLuis R. Rodriguez if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE && 1724361c9c8bSJohannes Berg PTR_ERR(reg_rule) == -ERANGE) 17258318d78aSJohannes Berg return; 17268318d78aSJohannes Berg 1727cc493e4fSLuis R. Rodriguez if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER && 1728cc493e4fSLuis R. Rodriguez request_wiphy && request_wiphy == wiphy && 1729a2f73b6cSLuis R. Rodriguez request_wiphy->regulatory_flags & REGULATORY_STRICT_REG) { 1730c799ba6eSJohannes Berg pr_debug("Disabling freq %d MHz for good\n", 1731cc493e4fSLuis R. Rodriguez chan->center_freq); 1732cc493e4fSLuis R. Rodriguez chan->orig_flags |= IEEE80211_CHAN_DISABLED; 1733cc493e4fSLuis R. Rodriguez chan->flags = chan->orig_flags; 1734cc493e4fSLuis R. Rodriguez } else { 1735c799ba6eSJohannes Berg pr_debug("Disabling freq %d MHz\n", 1736cc493e4fSLuis R. Rodriguez chan->center_freq); 1737990de49fSJohannes Berg chan->flags |= IEEE80211_CHAN_DISABLED; 1738cc493e4fSLuis R. Rodriguez } 1739ca4ffe8fSLuis R. Rodriguez return; 1740ca4ffe8fSLuis R. Rodriguez } 1741ca4ffe8fSLuis R. Rodriguez 1742b0dfd2eaSJanusz Dziedzic regd = reg_get_regdomain(wiphy); 1743e702d3cfSLuis R. Rodriguez 1744b2e1b302SLuis R. Rodriguez power_rule = ®_rule->power_rule; 17451aeb135fSMichal Sojka bw_flags = reg_rule_to_chan_bw_flags(regd, reg_rule, chan); 1746b2e1b302SLuis R. Rodriguez 1747c492db37SJohannes Berg if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER && 1748806a9e39SLuis R. Rodriguez request_wiphy && request_wiphy == wiphy && 1749a2f73b6cSLuis R. Rodriguez request_wiphy->regulatory_flags & REGULATORY_STRICT_REG) { 1750fb1fc7adSLuis R. Rodriguez /* 175125985edcSLucas De Marchi * This guarantees the driver's requested regulatory domain 1752f976376dSLuis R. Rodriguez * will always be used as a base for further regulatory 1753fb1fc7adSLuis R. Rodriguez * settings 1754fb1fc7adSLuis R. Rodriguez */ 1755f976376dSLuis R. Rodriguez chan->flags = chan->orig_flags = 1756038659e7SLuis R. Rodriguez map_regdom_flags(reg_rule->flags) | bw_flags; 1757f976376dSLuis R. Rodriguez chan->max_antenna_gain = chan->orig_mag = 1758f976376dSLuis R. Rodriguez (int) MBI_TO_DBI(power_rule->max_antenna_gain); 1759279f0f55SFelix Fietkau chan->max_reg_power = chan->max_power = chan->orig_mpwr = 1760f976376dSLuis R. Rodriguez (int) MBM_TO_DBM(power_rule->max_eirp); 17614f267c11SJanusz Dziedzic 17624f267c11SJanusz Dziedzic if (chan->flags & IEEE80211_CHAN_RADAR) { 17634f267c11SJanusz Dziedzic chan->dfs_cac_ms = IEEE80211_DFS_MIN_CAC_TIME_MS; 17644f267c11SJanusz Dziedzic if (reg_rule->dfs_cac_ms) 17654f267c11SJanusz Dziedzic chan->dfs_cac_ms = reg_rule->dfs_cac_ms; 17664f267c11SJanusz Dziedzic } 17674f267c11SJanusz Dziedzic 1768f976376dSLuis R. Rodriguez return; 1769f976376dSLuis R. Rodriguez } 1770f976376dSLuis R. Rodriguez 177104f39047SSimon Wunderlich chan->dfs_state = NL80211_DFS_USABLE; 177204f39047SSimon Wunderlich chan->dfs_state_entered = jiffies; 177304f39047SSimon Wunderlich 1774aa3d7eefSRajkumar Manoharan chan->beacon_found = false; 1775038659e7SLuis R. Rodriguez chan->flags = flags | bw_flags | map_regdom_flags(reg_rule->flags); 17761a919318SJohannes Berg chan->max_antenna_gain = 17771a919318SJohannes Berg min_t(int, chan->orig_mag, 17781a919318SJohannes Berg MBI_TO_DBI(power_rule->max_antenna_gain)); 1779eccc068eSHong Wu chan->max_reg_power = (int) MBM_TO_DBM(power_rule->max_eirp); 1780089027e5SJanusz Dziedzic 1781089027e5SJanusz Dziedzic if (chan->flags & IEEE80211_CHAN_RADAR) { 1782089027e5SJanusz Dziedzic if (reg_rule->dfs_cac_ms) 1783089027e5SJanusz Dziedzic chan->dfs_cac_ms = reg_rule->dfs_cac_ms; 1784089027e5SJanusz Dziedzic else 1785089027e5SJanusz Dziedzic chan->dfs_cac_ms = IEEE80211_DFS_MIN_CAC_TIME_MS; 1786089027e5SJanusz Dziedzic } 1787089027e5SJanusz Dziedzic 17885e31fc08SStanislaw Gruszka if (chan->orig_mpwr) { 17895e31fc08SStanislaw Gruszka /* 1790a09a85a0SLuis R. Rodriguez * Devices that use REGULATORY_COUNTRY_IE_FOLLOW_POWER 1791a09a85a0SLuis R. Rodriguez * will always follow the passed country IE power settings. 17925e31fc08SStanislaw Gruszka */ 17935e31fc08SStanislaw Gruszka if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE && 1794a09a85a0SLuis R. Rodriguez wiphy->regulatory_flags & REGULATORY_COUNTRY_IE_FOLLOW_POWER) 17955e31fc08SStanislaw Gruszka chan->max_power = chan->max_reg_power; 17965e31fc08SStanislaw Gruszka else 17975e31fc08SStanislaw Gruszka chan->max_power = min(chan->orig_mpwr, 17985e31fc08SStanislaw Gruszka chan->max_reg_power); 17995e31fc08SStanislaw Gruszka } else 18005e31fc08SStanislaw Gruszka chan->max_power = chan->max_reg_power; 18018318d78aSJohannes Berg } 18028318d78aSJohannes Berg 18037ca43d03SLuis R. Rodriguez static void handle_band(struct wiphy *wiphy, 1804fdc9d7b2SJohannes Berg enum nl80211_reg_initiator initiator, 1805fdc9d7b2SJohannes Berg struct ieee80211_supported_band *sband) 18068318d78aSJohannes Berg { 1807a92a3ce7SLuis R. Rodriguez unsigned int i; 1808a92a3ce7SLuis R. Rodriguez 1809fdc9d7b2SJohannes Berg if (!sband) 1810fdc9d7b2SJohannes Berg return; 18118318d78aSJohannes Berg 18128318d78aSJohannes Berg for (i = 0; i < sband->n_channels; i++) 1813fdc9d7b2SJohannes Berg handle_channel(wiphy, initiator, &sband->channels[i]); 18148318d78aSJohannes Berg } 18158318d78aSJohannes Berg 181657b5ce07SLuis R. Rodriguez static bool reg_request_cell_base(struct regulatory_request *request) 181757b5ce07SLuis R. Rodriguez { 181857b5ce07SLuis R. Rodriguez if (request->initiator != NL80211_REGDOM_SET_BY_USER) 181957b5ce07SLuis R. Rodriguez return false; 18201a919318SJohannes Berg return request->user_reg_hint_type == NL80211_USER_REG_HINT_CELL_BASE; 182157b5ce07SLuis R. Rodriguez } 182257b5ce07SLuis R. Rodriguez 182357b5ce07SLuis R. Rodriguez bool reg_last_request_cell_base(void) 182457b5ce07SLuis R. Rodriguez { 182538fd2143SJohannes Berg return reg_request_cell_base(get_last_request()); 182657b5ce07SLuis R. Rodriguez } 182757b5ce07SLuis R. Rodriguez 182894fc661fSIlan Peer #ifdef CONFIG_CFG80211_REG_CELLULAR_HINTS 182957b5ce07SLuis R. Rodriguez /* Core specific check */ 18302f92212bSJohannes Berg static enum reg_request_treatment 18312f92212bSJohannes Berg reg_ignore_cell_hint(struct regulatory_request *pending_request) 183257b5ce07SLuis R. Rodriguez { 1833c492db37SJohannes Berg struct regulatory_request *lr = get_last_request(); 183457b5ce07SLuis R. Rodriguez 183557b5ce07SLuis R. Rodriguez if (!reg_num_devs_support_basehint) 18362f92212bSJohannes Berg return REG_REQ_IGNORE; 183757b5ce07SLuis R. Rodriguez 1838c492db37SJohannes Berg if (reg_request_cell_base(lr) && 18391a919318SJohannes Berg !regdom_changes(pending_request->alpha2)) 18402f92212bSJohannes Berg return REG_REQ_ALREADY_SET; 18411a919318SJohannes Berg 18422f92212bSJohannes Berg return REG_REQ_OK; 184357b5ce07SLuis R. Rodriguez } 184457b5ce07SLuis R. Rodriguez 184557b5ce07SLuis R. Rodriguez /* Device specific check */ 184657b5ce07SLuis R. Rodriguez static bool reg_dev_ignore_cell_hint(struct wiphy *wiphy) 184757b5ce07SLuis R. Rodriguez { 18481a919318SJohannes Berg return !(wiphy->features & NL80211_FEATURE_CELL_BASE_REG_HINTS); 184957b5ce07SLuis R. Rodriguez } 185057b5ce07SLuis R. Rodriguez #else 1851a515de66SJohannes Berg static enum reg_request_treatment 1852a515de66SJohannes Berg reg_ignore_cell_hint(struct regulatory_request *pending_request) 185357b5ce07SLuis R. Rodriguez { 18542f92212bSJohannes Berg return REG_REQ_IGNORE; 185557b5ce07SLuis R. Rodriguez } 18561a919318SJohannes Berg 18571a919318SJohannes Berg static bool reg_dev_ignore_cell_hint(struct wiphy *wiphy) 185857b5ce07SLuis R. Rodriguez { 185957b5ce07SLuis R. Rodriguez return true; 186057b5ce07SLuis R. Rodriguez } 186157b5ce07SLuis R. Rodriguez #endif 186257b5ce07SLuis R. Rodriguez 1863fa1fb9cbSLuis R. Rodriguez static bool wiphy_strict_alpha2_regd(struct wiphy *wiphy) 1864fa1fb9cbSLuis R. Rodriguez { 1865a2f73b6cSLuis R. Rodriguez if (wiphy->regulatory_flags & REGULATORY_STRICT_REG && 1866a2f73b6cSLuis R. Rodriguez !(wiphy->regulatory_flags & REGULATORY_CUSTOM_REG)) 1867fa1fb9cbSLuis R. Rodriguez return true; 1868fa1fb9cbSLuis R. Rodriguez return false; 1869fa1fb9cbSLuis R. Rodriguez } 187057b5ce07SLuis R. Rodriguez 18717db90f4aSLuis R. Rodriguez static bool ignore_reg_update(struct wiphy *wiphy, 18727db90f4aSLuis R. Rodriguez enum nl80211_reg_initiator initiator) 187314b9815aSLuis R. Rodriguez { 1874c492db37SJohannes Berg struct regulatory_request *lr = get_last_request(); 1875c492db37SJohannes Berg 1876b0d7aa59SJonathan Doron if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) 1877b0d7aa59SJonathan Doron return true; 1878b0d7aa59SJonathan Doron 1879c492db37SJohannes Berg if (!lr) { 1880c799ba6eSJohannes Berg pr_debug("Ignoring regulatory request set by %s since last_request is not set\n", 1881926a0a09SLuis R. Rodriguez reg_initiator_name(initiator)); 188214b9815aSLuis R. Rodriguez return true; 1883926a0a09SLuis R. Rodriguez } 1884926a0a09SLuis R. Rodriguez 18857db90f4aSLuis R. Rodriguez if (initiator == NL80211_REGDOM_SET_BY_CORE && 1886a2f73b6cSLuis R. Rodriguez wiphy->regulatory_flags & REGULATORY_CUSTOM_REG) { 1887c799ba6eSJohannes Berg pr_debug("Ignoring regulatory request set by %s since the driver uses its own custom regulatory domain\n", 1888926a0a09SLuis R. Rodriguez reg_initiator_name(initiator)); 188914b9815aSLuis R. Rodriguez return true; 1890926a0a09SLuis R. Rodriguez } 1891926a0a09SLuis R. Rodriguez 1892fb1fc7adSLuis R. Rodriguez /* 1893fb1fc7adSLuis R. Rodriguez * wiphy->regd will be set once the device has its own 1894fb1fc7adSLuis R. Rodriguez * desired regulatory domain set 1895fb1fc7adSLuis R. Rodriguez */ 1896fa1fb9cbSLuis R. Rodriguez if (wiphy_strict_alpha2_regd(wiphy) && !wiphy->regd && 1897749b527bSLuis R. Rodriguez initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && 1898c492db37SJohannes Berg !is_world_regdom(lr->alpha2)) { 1899c799ba6eSJohannes Berg pr_debug("Ignoring regulatory request set by %s since the driver requires its own regulatory domain to be set first\n", 1900926a0a09SLuis R. Rodriguez reg_initiator_name(initiator)); 190114b9815aSLuis R. Rodriguez return true; 1902926a0a09SLuis R. Rodriguez } 1903926a0a09SLuis R. Rodriguez 1904c492db37SJohannes Berg if (reg_request_cell_base(lr)) 190557b5ce07SLuis R. Rodriguez return reg_dev_ignore_cell_hint(wiphy); 190657b5ce07SLuis R. Rodriguez 190714b9815aSLuis R. Rodriguez return false; 190814b9815aSLuis R. Rodriguez } 190914b9815aSLuis R. Rodriguez 19103195e489SLuis R. Rodriguez static bool reg_is_world_roaming(struct wiphy *wiphy) 19113195e489SLuis R. Rodriguez { 19123195e489SLuis R. Rodriguez const struct ieee80211_regdomain *cr = get_cfg80211_regdom(); 19133195e489SLuis R. Rodriguez const struct ieee80211_regdomain *wr = get_wiphy_regdom(wiphy); 19143195e489SLuis R. Rodriguez struct regulatory_request *lr = get_last_request(); 19153195e489SLuis R. Rodriguez 19163195e489SLuis R. Rodriguez if (is_world_regdom(cr->alpha2) || (wr && is_world_regdom(wr->alpha2))) 19173195e489SLuis R. Rodriguez return true; 19183195e489SLuis R. Rodriguez 19193195e489SLuis R. Rodriguez if (lr && lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && 1920a2f73b6cSLuis R. Rodriguez wiphy->regulatory_flags & REGULATORY_CUSTOM_REG) 19213195e489SLuis R. Rodriguez return true; 19223195e489SLuis R. Rodriguez 19233195e489SLuis R. Rodriguez return false; 19243195e489SLuis R. Rodriguez } 19253195e489SLuis R. Rodriguez 19261a919318SJohannes Berg static void handle_reg_beacon(struct wiphy *wiphy, unsigned int chan_idx, 1927e38f8a7aSLuis R. Rodriguez struct reg_beacon *reg_beacon) 1928e38f8a7aSLuis R. Rodriguez { 1929e38f8a7aSLuis R. Rodriguez struct ieee80211_supported_band *sband; 1930e38f8a7aSLuis R. Rodriguez struct ieee80211_channel *chan; 19316bad8766SLuis R. Rodriguez bool channel_changed = false; 19326bad8766SLuis R. Rodriguez struct ieee80211_channel chan_before; 1933e38f8a7aSLuis R. Rodriguez 1934e38f8a7aSLuis R. Rodriguez sband = wiphy->bands[reg_beacon->chan.band]; 1935e38f8a7aSLuis R. Rodriguez chan = &sband->channels[chan_idx]; 1936e38f8a7aSLuis R. Rodriguez 1937e38f8a7aSLuis R. Rodriguez if (likely(chan->center_freq != reg_beacon->chan.center_freq)) 1938e38f8a7aSLuis R. Rodriguez return; 1939e38f8a7aSLuis R. Rodriguez 19406bad8766SLuis R. Rodriguez if (chan->beacon_found) 19416bad8766SLuis R. Rodriguez return; 19426bad8766SLuis R. Rodriguez 19436bad8766SLuis R. Rodriguez chan->beacon_found = true; 19446bad8766SLuis R. Rodriguez 19450f500a5fSLuis R. Rodriguez if (!reg_is_world_roaming(wiphy)) 19460f500a5fSLuis R. Rodriguez return; 19470f500a5fSLuis R. Rodriguez 1948a2f73b6cSLuis R. Rodriguez if (wiphy->regulatory_flags & REGULATORY_DISABLE_BEACON_HINTS) 194937184244SLuis R. Rodriguez return; 195037184244SLuis R. Rodriguez 1951a48a52b7SJohannes Berg chan_before = *chan; 19526bad8766SLuis R. Rodriguez 19538fe02e16SLuis R. Rodriguez if (chan->flags & IEEE80211_CHAN_NO_IR) { 19548fe02e16SLuis R. Rodriguez chan->flags &= ~IEEE80211_CHAN_NO_IR; 19556bad8766SLuis R. Rodriguez channel_changed = true; 1956e38f8a7aSLuis R. Rodriguez } 1957e38f8a7aSLuis R. Rodriguez 19586bad8766SLuis R. Rodriguez if (channel_changed) 19596bad8766SLuis R. Rodriguez nl80211_send_beacon_hint_event(wiphy, &chan_before, chan); 1960e38f8a7aSLuis R. Rodriguez } 1961e38f8a7aSLuis R. Rodriguez 1962e38f8a7aSLuis R. Rodriguez /* 1963e38f8a7aSLuis R. Rodriguez * Called when a scan on a wiphy finds a beacon on 1964e38f8a7aSLuis R. Rodriguez * new channel 1965e38f8a7aSLuis R. Rodriguez */ 1966e38f8a7aSLuis R. Rodriguez static void wiphy_update_new_beacon(struct wiphy *wiphy, 1967e38f8a7aSLuis R. Rodriguez struct reg_beacon *reg_beacon) 1968e38f8a7aSLuis R. Rodriguez { 1969e38f8a7aSLuis R. Rodriguez unsigned int i; 1970e38f8a7aSLuis R. Rodriguez struct ieee80211_supported_band *sband; 1971e38f8a7aSLuis R. Rodriguez 1972e38f8a7aSLuis R. Rodriguez if (!wiphy->bands[reg_beacon->chan.band]) 1973e38f8a7aSLuis R. Rodriguez return; 1974e38f8a7aSLuis R. Rodriguez 1975e38f8a7aSLuis R. Rodriguez sband = wiphy->bands[reg_beacon->chan.band]; 1976e38f8a7aSLuis R. Rodriguez 1977e38f8a7aSLuis R. Rodriguez for (i = 0; i < sband->n_channels; i++) 1978e38f8a7aSLuis R. Rodriguez handle_reg_beacon(wiphy, i, reg_beacon); 1979e38f8a7aSLuis R. Rodriguez } 1980e38f8a7aSLuis R. Rodriguez 1981e38f8a7aSLuis R. Rodriguez /* 1982e38f8a7aSLuis R. Rodriguez * Called upon reg changes or a new wiphy is added 1983e38f8a7aSLuis R. Rodriguez */ 1984e38f8a7aSLuis R. Rodriguez static void wiphy_update_beacon_reg(struct wiphy *wiphy) 1985e38f8a7aSLuis R. Rodriguez { 1986e38f8a7aSLuis R. Rodriguez unsigned int i; 1987e38f8a7aSLuis R. Rodriguez struct ieee80211_supported_band *sband; 1988e38f8a7aSLuis R. Rodriguez struct reg_beacon *reg_beacon; 1989e38f8a7aSLuis R. Rodriguez 1990e38f8a7aSLuis R. Rodriguez list_for_each_entry(reg_beacon, ®_beacon_list, list) { 1991e38f8a7aSLuis R. Rodriguez if (!wiphy->bands[reg_beacon->chan.band]) 1992e38f8a7aSLuis R. Rodriguez continue; 1993e38f8a7aSLuis R. Rodriguez sband = wiphy->bands[reg_beacon->chan.band]; 1994e38f8a7aSLuis R. Rodriguez for (i = 0; i < sband->n_channels; i++) 1995e38f8a7aSLuis R. Rodriguez handle_reg_beacon(wiphy, i, reg_beacon); 1996e38f8a7aSLuis R. Rodriguez } 1997e38f8a7aSLuis R. Rodriguez } 1998e38f8a7aSLuis R. Rodriguez 1999e38f8a7aSLuis R. Rodriguez /* Reap the advantages of previously found beacons */ 2000e38f8a7aSLuis R. Rodriguez static void reg_process_beacons(struct wiphy *wiphy) 2001e38f8a7aSLuis R. Rodriguez { 2002b1ed8dddSLuis R. Rodriguez /* 2003b1ed8dddSLuis R. Rodriguez * Means we are just firing up cfg80211, so no beacons would 2004b1ed8dddSLuis R. Rodriguez * have been processed yet. 2005b1ed8dddSLuis R. Rodriguez */ 2006b1ed8dddSLuis R. Rodriguez if (!last_request) 2007b1ed8dddSLuis R. Rodriguez return; 2008e38f8a7aSLuis R. Rodriguez wiphy_update_beacon_reg(wiphy); 2009e38f8a7aSLuis R. Rodriguez } 2010e38f8a7aSLuis R. Rodriguez 20111a919318SJohannes Berg static bool is_ht40_allowed(struct ieee80211_channel *chan) 2012038659e7SLuis R. Rodriguez { 2013038659e7SLuis R. Rodriguez if (!chan) 2014038659e7SLuis R. Rodriguez return false; 20151a919318SJohannes Berg if (chan->flags & IEEE80211_CHAN_DISABLED) 20161a919318SJohannes Berg return false; 20171a919318SJohannes Berg /* This would happen when regulatory rules disallow HT40 completely */ 201855b183adSFelix Fietkau if ((chan->flags & IEEE80211_CHAN_NO_HT40) == IEEE80211_CHAN_NO_HT40) 201955b183adSFelix Fietkau return false; 202055b183adSFelix Fietkau return true; 2021038659e7SLuis R. Rodriguez } 2022038659e7SLuis R. Rodriguez 2023038659e7SLuis R. Rodriguez static void reg_process_ht_flags_channel(struct wiphy *wiphy, 2024fdc9d7b2SJohannes Berg struct ieee80211_channel *channel) 2025038659e7SLuis R. Rodriguez { 2026fdc9d7b2SJohannes Berg struct ieee80211_supported_band *sband = wiphy->bands[channel->band]; 2027038659e7SLuis R. Rodriguez struct ieee80211_channel *channel_before = NULL, *channel_after = NULL; 20284e0854a7SEmmanuel Grumbach const struct ieee80211_regdomain *regd; 2029038659e7SLuis R. Rodriguez unsigned int i; 20304e0854a7SEmmanuel Grumbach u32 flags; 2031038659e7SLuis R. Rodriguez 20321a919318SJohannes Berg if (!is_ht40_allowed(channel)) { 2033038659e7SLuis R. Rodriguez channel->flags |= IEEE80211_CHAN_NO_HT40; 2034038659e7SLuis R. Rodriguez return; 2035038659e7SLuis R. Rodriguez } 2036038659e7SLuis R. Rodriguez 2037038659e7SLuis R. Rodriguez /* 2038038659e7SLuis R. Rodriguez * We need to ensure the extension channels exist to 2039038659e7SLuis R. Rodriguez * be able to use HT40- or HT40+, this finds them (or not) 2040038659e7SLuis R. Rodriguez */ 2041038659e7SLuis R. Rodriguez for (i = 0; i < sband->n_channels; i++) { 2042038659e7SLuis R. Rodriguez struct ieee80211_channel *c = &sband->channels[i]; 20431a919318SJohannes Berg 2044038659e7SLuis R. Rodriguez if (c->center_freq == (channel->center_freq - 20)) 2045038659e7SLuis R. Rodriguez channel_before = c; 2046038659e7SLuis R. Rodriguez if (c->center_freq == (channel->center_freq + 20)) 2047038659e7SLuis R. Rodriguez channel_after = c; 2048038659e7SLuis R. Rodriguez } 2049038659e7SLuis R. Rodriguez 20504e0854a7SEmmanuel Grumbach flags = 0; 20514e0854a7SEmmanuel Grumbach regd = get_wiphy_regdom(wiphy); 20524e0854a7SEmmanuel Grumbach if (regd) { 20534e0854a7SEmmanuel Grumbach const struct ieee80211_reg_rule *reg_rule = 20544e0854a7SEmmanuel Grumbach freq_reg_info_regd(MHZ_TO_KHZ(channel->center_freq), 20554e0854a7SEmmanuel Grumbach regd, MHZ_TO_KHZ(20)); 20564e0854a7SEmmanuel Grumbach 20574e0854a7SEmmanuel Grumbach if (!IS_ERR(reg_rule)) 20584e0854a7SEmmanuel Grumbach flags = reg_rule->flags; 20594e0854a7SEmmanuel Grumbach } 20604e0854a7SEmmanuel Grumbach 2061038659e7SLuis R. Rodriguez /* 2062038659e7SLuis R. Rodriguez * Please note that this assumes target bandwidth is 20 MHz, 2063038659e7SLuis R. Rodriguez * if that ever changes we also need to change the below logic 2064038659e7SLuis R. Rodriguez * to include that as well. 2065038659e7SLuis R. Rodriguez */ 20664e0854a7SEmmanuel Grumbach if (!is_ht40_allowed(channel_before) || 20674e0854a7SEmmanuel Grumbach flags & NL80211_RRF_NO_HT40MINUS) 2068689da1b3SLuis R. Rodriguez channel->flags |= IEEE80211_CHAN_NO_HT40MINUS; 2069038659e7SLuis R. Rodriguez else 2070689da1b3SLuis R. Rodriguez channel->flags &= ~IEEE80211_CHAN_NO_HT40MINUS; 2071038659e7SLuis R. Rodriguez 20724e0854a7SEmmanuel Grumbach if (!is_ht40_allowed(channel_after) || 20734e0854a7SEmmanuel Grumbach flags & NL80211_RRF_NO_HT40PLUS) 2074689da1b3SLuis R. Rodriguez channel->flags |= IEEE80211_CHAN_NO_HT40PLUS; 2075038659e7SLuis R. Rodriguez else 2076689da1b3SLuis R. Rodriguez channel->flags &= ~IEEE80211_CHAN_NO_HT40PLUS; 2077038659e7SLuis R. Rodriguez } 2078038659e7SLuis R. Rodriguez 2079038659e7SLuis R. Rodriguez static void reg_process_ht_flags_band(struct wiphy *wiphy, 2080fdc9d7b2SJohannes Berg struct ieee80211_supported_band *sband) 2081038659e7SLuis R. Rodriguez { 2082038659e7SLuis R. Rodriguez unsigned int i; 2083038659e7SLuis R. Rodriguez 2084fdc9d7b2SJohannes Berg if (!sband) 2085fdc9d7b2SJohannes Berg return; 2086038659e7SLuis R. Rodriguez 2087038659e7SLuis R. Rodriguez for (i = 0; i < sband->n_channels; i++) 2088fdc9d7b2SJohannes Berg reg_process_ht_flags_channel(wiphy, &sband->channels[i]); 2089038659e7SLuis R. Rodriguez } 2090038659e7SLuis R. Rodriguez 2091038659e7SLuis R. Rodriguez static void reg_process_ht_flags(struct wiphy *wiphy) 2092038659e7SLuis R. Rodriguez { 209357fbcce3SJohannes Berg enum nl80211_band band; 2094038659e7SLuis R. Rodriguez 2095038659e7SLuis R. Rodriguez if (!wiphy) 2096038659e7SLuis R. Rodriguez return; 2097038659e7SLuis R. Rodriguez 209857fbcce3SJohannes Berg for (band = 0; band < NUM_NL80211_BANDS; band++) 2099fdc9d7b2SJohannes Berg reg_process_ht_flags_band(wiphy, wiphy->bands[band]); 2100038659e7SLuis R. Rodriguez } 2101038659e7SLuis R. Rodriguez 21020e3802dbSLuis R. Rodriguez static void reg_call_notifier(struct wiphy *wiphy, 21030e3802dbSLuis R. Rodriguez struct regulatory_request *request) 21040e3802dbSLuis R. Rodriguez { 21050e3802dbSLuis R. Rodriguez if (wiphy->reg_notifier) 21060e3802dbSLuis R. Rodriguez wiphy->reg_notifier(wiphy, request); 21070e3802dbSLuis R. Rodriguez } 21080e3802dbSLuis R. Rodriguez 2109ad932f04SArik Nemtsov static bool reg_wdev_chan_valid(struct wiphy *wiphy, struct wireless_dev *wdev) 2110ad932f04SArik Nemtsov { 2111f43e5210SJohannes Berg struct cfg80211_chan_def chandef = {}; 2112ad932f04SArik Nemtsov struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); 211320658702SArik Nemtsov enum nl80211_iftype iftype; 2114ad932f04SArik Nemtsov 2115ad932f04SArik Nemtsov wdev_lock(wdev); 211620658702SArik Nemtsov iftype = wdev->iftype; 2117ad932f04SArik Nemtsov 211820658702SArik Nemtsov /* make sure the interface is active */ 2119ad932f04SArik Nemtsov if (!wdev->netdev || !netif_running(wdev->netdev)) 212020658702SArik Nemtsov goto wdev_inactive_unlock; 2121ad932f04SArik Nemtsov 212220658702SArik Nemtsov switch (iftype) { 2123ad932f04SArik Nemtsov case NL80211_IFTYPE_AP: 2124ad932f04SArik Nemtsov case NL80211_IFTYPE_P2P_GO: 2125ad932f04SArik Nemtsov if (!wdev->beacon_interval) 212620658702SArik Nemtsov goto wdev_inactive_unlock; 212720658702SArik Nemtsov chandef = wdev->chandef; 2128ad932f04SArik Nemtsov break; 2129185076d6SArik Nemtsov case NL80211_IFTYPE_ADHOC: 2130185076d6SArik Nemtsov if (!wdev->ssid_len) 213120658702SArik Nemtsov goto wdev_inactive_unlock; 213220658702SArik Nemtsov chandef = wdev->chandef; 2133185076d6SArik Nemtsov break; 2134ad932f04SArik Nemtsov case NL80211_IFTYPE_STATION: 2135ad932f04SArik Nemtsov case NL80211_IFTYPE_P2P_CLIENT: 2136ad932f04SArik Nemtsov if (!wdev->current_bss || 2137ad932f04SArik Nemtsov !wdev->current_bss->pub.channel) 213820658702SArik Nemtsov goto wdev_inactive_unlock; 2139ad932f04SArik Nemtsov 214020658702SArik Nemtsov if (!rdev->ops->get_channel || 214120658702SArik Nemtsov rdev_get_channel(rdev, wdev, &chandef)) 214220658702SArik Nemtsov cfg80211_chandef_create(&chandef, 214320658702SArik Nemtsov wdev->current_bss->pub.channel, 214420658702SArik Nemtsov NL80211_CHAN_NO_HT); 2145ad932f04SArik Nemtsov break; 2146ad932f04SArik Nemtsov case NL80211_IFTYPE_MONITOR: 2147ad932f04SArik Nemtsov case NL80211_IFTYPE_AP_VLAN: 2148ad932f04SArik Nemtsov case NL80211_IFTYPE_P2P_DEVICE: 2149ad932f04SArik Nemtsov /* no enforcement required */ 2150ad932f04SArik Nemtsov break; 2151ad932f04SArik Nemtsov default: 2152ad932f04SArik Nemtsov /* others not implemented for now */ 2153ad932f04SArik Nemtsov WARN_ON(1); 2154ad932f04SArik Nemtsov break; 2155ad932f04SArik Nemtsov } 2156ad932f04SArik Nemtsov 2157ad932f04SArik Nemtsov wdev_unlock(wdev); 215820658702SArik Nemtsov 215920658702SArik Nemtsov switch (iftype) { 216020658702SArik Nemtsov case NL80211_IFTYPE_AP: 216120658702SArik Nemtsov case NL80211_IFTYPE_P2P_GO: 216220658702SArik Nemtsov case NL80211_IFTYPE_ADHOC: 2163923b352fSArik Nemtsov return cfg80211_reg_can_beacon_relax(wiphy, &chandef, iftype); 216420658702SArik Nemtsov case NL80211_IFTYPE_STATION: 216520658702SArik Nemtsov case NL80211_IFTYPE_P2P_CLIENT: 216620658702SArik Nemtsov return cfg80211_chandef_usable(wiphy, &chandef, 216720658702SArik Nemtsov IEEE80211_CHAN_DISABLED); 216820658702SArik Nemtsov default: 216920658702SArik Nemtsov break; 217020658702SArik Nemtsov } 217120658702SArik Nemtsov 217220658702SArik Nemtsov return true; 217320658702SArik Nemtsov 217420658702SArik Nemtsov wdev_inactive_unlock: 217520658702SArik Nemtsov wdev_unlock(wdev); 217620658702SArik Nemtsov return true; 2177ad932f04SArik Nemtsov } 2178ad932f04SArik Nemtsov 2179ad932f04SArik Nemtsov static void reg_leave_invalid_chans(struct wiphy *wiphy) 2180ad932f04SArik Nemtsov { 2181ad932f04SArik Nemtsov struct wireless_dev *wdev; 2182ad932f04SArik Nemtsov struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); 2183ad932f04SArik Nemtsov 2184ad932f04SArik Nemtsov ASSERT_RTNL(); 2185ad932f04SArik Nemtsov 218653873f13SJohannes Berg list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) 2187ad932f04SArik Nemtsov if (!reg_wdev_chan_valid(wiphy, wdev)) 2188ad932f04SArik Nemtsov cfg80211_leave(rdev, wdev); 2189ad932f04SArik Nemtsov } 2190ad932f04SArik Nemtsov 2191ad932f04SArik Nemtsov static void reg_check_chans_work(struct work_struct *work) 2192ad932f04SArik Nemtsov { 2193ad932f04SArik Nemtsov struct cfg80211_registered_device *rdev; 2194ad932f04SArik Nemtsov 2195c799ba6eSJohannes Berg pr_debug("Verifying active interfaces after reg change\n"); 2196ad932f04SArik Nemtsov rtnl_lock(); 2197ad932f04SArik Nemtsov 2198ad932f04SArik Nemtsov list_for_each_entry(rdev, &cfg80211_rdev_list, list) 2199ad932f04SArik Nemtsov if (!(rdev->wiphy.regulatory_flags & 2200ad932f04SArik Nemtsov REGULATORY_IGNORE_STALE_KICKOFF)) 2201ad932f04SArik Nemtsov reg_leave_invalid_chans(&rdev->wiphy); 2202ad932f04SArik Nemtsov 2203ad932f04SArik Nemtsov rtnl_unlock(); 2204ad932f04SArik Nemtsov } 2205ad932f04SArik Nemtsov 2206ad932f04SArik Nemtsov static void reg_check_channels(void) 2207ad932f04SArik Nemtsov { 2208ad932f04SArik Nemtsov /* 2209ad932f04SArik Nemtsov * Give usermode a chance to do something nicer (move to another 2210ad932f04SArik Nemtsov * channel, orderly disconnection), before forcing a disconnection. 2211ad932f04SArik Nemtsov */ 2212ad932f04SArik Nemtsov mod_delayed_work(system_power_efficient_wq, 2213ad932f04SArik Nemtsov ®_check_chans, 2214ad932f04SArik Nemtsov msecs_to_jiffies(REG_ENFORCE_GRACE_MS)); 2215ad932f04SArik Nemtsov } 2216ad932f04SArik Nemtsov 2217eac03e38SSven Neumann static void wiphy_update_regulatory(struct wiphy *wiphy, 22187db90f4aSLuis R. Rodriguez enum nl80211_reg_initiator initiator) 22198318d78aSJohannes Berg { 222057fbcce3SJohannes Berg enum nl80211_band band; 2221c492db37SJohannes Berg struct regulatory_request *lr = get_last_request(); 2222eac03e38SSven Neumann 22230e3802dbSLuis R. Rodriguez if (ignore_reg_update(wiphy, initiator)) { 22240e3802dbSLuis R. Rodriguez /* 22250e3802dbSLuis R. Rodriguez * Regulatory updates set by CORE are ignored for custom 22260e3802dbSLuis R. Rodriguez * regulatory cards. Let us notify the changes to the driver, 22270e3802dbSLuis R. Rodriguez * as some drivers used this to restore its orig_* reg domain. 22280e3802dbSLuis R. Rodriguez */ 22290e3802dbSLuis R. Rodriguez if (initiator == NL80211_REGDOM_SET_BY_CORE && 2230e31f6456SAmar Singhal wiphy->regulatory_flags & REGULATORY_CUSTOM_REG && 2231e31f6456SAmar Singhal !(wiphy->regulatory_flags & 2232e31f6456SAmar Singhal REGULATORY_WIPHY_SELF_MANAGED)) 22330e3802dbSLuis R. Rodriguez reg_call_notifier(wiphy, lr); 2234a203c2aaSSven Neumann return; 22350e3802dbSLuis R. Rodriguez } 2236a203c2aaSSven Neumann 2237c492db37SJohannes Berg lr->dfs_region = get_cfg80211_regdom()->dfs_region; 2238b68e6b3bSLuis R. Rodriguez 223957fbcce3SJohannes Berg for (band = 0; band < NUM_NL80211_BANDS; band++) 2240fdc9d7b2SJohannes Berg handle_band(wiphy, initiator, wiphy->bands[band]); 2241a203c2aaSSven Neumann 2242e38f8a7aSLuis R. Rodriguez reg_process_beacons(wiphy); 2243038659e7SLuis R. Rodriguez reg_process_ht_flags(wiphy); 22440e3802dbSLuis R. Rodriguez reg_call_notifier(wiphy, lr); 2245b2e1b302SLuis R. Rodriguez } 2246b2e1b302SLuis R. Rodriguez 2247d7549cbbSSven Neumann static void update_all_wiphy_regulatory(enum nl80211_reg_initiator initiator) 2248d7549cbbSSven Neumann { 2249d7549cbbSSven Neumann struct cfg80211_registered_device *rdev; 22504a38994fSRajkumar Manoharan struct wiphy *wiphy; 2251d7549cbbSSven Neumann 22525fe231e8SJohannes Berg ASSERT_RTNL(); 2253458f4f9eSJohannes Berg 22544a38994fSRajkumar Manoharan list_for_each_entry(rdev, &cfg80211_rdev_list, list) { 22554a38994fSRajkumar Manoharan wiphy = &rdev->wiphy; 22564a38994fSRajkumar Manoharan wiphy_update_regulatory(wiphy, initiator); 22574a38994fSRajkumar Manoharan } 2258ad932f04SArik Nemtsov 2259ad932f04SArik Nemtsov reg_check_channels(); 2260d7549cbbSSven Neumann } 2261d7549cbbSSven Neumann 22621fa25e41SLuis R. Rodriguez static void handle_channel_custom(struct wiphy *wiphy, 2263fdc9d7b2SJohannes Berg struct ieee80211_channel *chan, 2264c4b9d655SGanapathi Bhat const struct ieee80211_regdomain *regd, 2265c4b9d655SGanapathi Bhat u32 min_bw) 22661fa25e41SLuis R. Rodriguez { 2267038659e7SLuis R. Rodriguez u32 bw_flags = 0; 22681fa25e41SLuis R. Rodriguez const struct ieee80211_reg_rule *reg_rule = NULL; 22691fa25e41SLuis R. Rodriguez const struct ieee80211_power_rule *power_rule = NULL; 22704edd5698SMatthias May u32 bw; 22711fa25e41SLuis R. Rodriguez 2272c4b9d655SGanapathi Bhat for (bw = MHZ_TO_KHZ(20); bw >= min_bw; bw = bw / 2) { 227349172874SMichal Sojka reg_rule = freq_reg_info_regd(MHZ_TO_KHZ(chan->center_freq), 22744edd5698SMatthias May regd, bw); 22754edd5698SMatthias May if (!IS_ERR(reg_rule)) 22764edd5698SMatthias May break; 22774edd5698SMatthias May } 22781fa25e41SLuis R. Rodriguez 2279361c9c8bSJohannes Berg if (IS_ERR(reg_rule)) { 2280c799ba6eSJohannes Berg pr_debug("Disabling freq %d MHz as custom regd has no rule that fits it\n", 2281fe7ef5e9SJohannes Berg chan->center_freq); 2282db8dfee5SArik Nemtsov if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) { 2283db8dfee5SArik Nemtsov chan->flags |= IEEE80211_CHAN_DISABLED; 2284db8dfee5SArik Nemtsov } else { 2285cc493e4fSLuis R. Rodriguez chan->orig_flags |= IEEE80211_CHAN_DISABLED; 2286cc493e4fSLuis R. Rodriguez chan->flags = chan->orig_flags; 2287db8dfee5SArik Nemtsov } 22881fa25e41SLuis R. Rodriguez return; 22891fa25e41SLuis R. Rodriguez } 22901fa25e41SLuis R. Rodriguez 22911fa25e41SLuis R. Rodriguez power_rule = ®_rule->power_rule; 22921aeb135fSMichal Sojka bw_flags = reg_rule_to_chan_bw_flags(regd, reg_rule, chan); 2293038659e7SLuis R. Rodriguez 22942e18b38fSArik Nemtsov chan->dfs_state_entered = jiffies; 2295c7ab5081SArik Nemtsov chan->dfs_state = NL80211_DFS_USABLE; 2296c7ab5081SArik Nemtsov 2297c7ab5081SArik Nemtsov chan->beacon_found = false; 2298db8dfee5SArik Nemtsov 2299db8dfee5SArik Nemtsov if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) 2300db8dfee5SArik Nemtsov chan->flags = chan->orig_flags | bw_flags | 2301db8dfee5SArik Nemtsov map_regdom_flags(reg_rule->flags); 2302db8dfee5SArik Nemtsov else 2303038659e7SLuis R. Rodriguez chan->flags |= map_regdom_flags(reg_rule->flags) | bw_flags; 2304db8dfee5SArik Nemtsov 23051fa25e41SLuis R. Rodriguez chan->max_antenna_gain = (int) MBI_TO_DBI(power_rule->max_antenna_gain); 2306279f0f55SFelix Fietkau chan->max_reg_power = chan->max_power = 2307279f0f55SFelix Fietkau (int) MBM_TO_DBM(power_rule->max_eirp); 23082e18b38fSArik Nemtsov 23092e18b38fSArik Nemtsov if (chan->flags & IEEE80211_CHAN_RADAR) { 23102e18b38fSArik Nemtsov if (reg_rule->dfs_cac_ms) 23112e18b38fSArik Nemtsov chan->dfs_cac_ms = reg_rule->dfs_cac_ms; 23122e18b38fSArik Nemtsov else 23132e18b38fSArik Nemtsov chan->dfs_cac_ms = IEEE80211_DFS_MIN_CAC_TIME_MS; 23142e18b38fSArik Nemtsov } 23152e18b38fSArik Nemtsov 23162e18b38fSArik Nemtsov chan->max_power = chan->max_reg_power; 23171fa25e41SLuis R. Rodriguez } 23181fa25e41SLuis R. Rodriguez 2319fdc9d7b2SJohannes Berg static void handle_band_custom(struct wiphy *wiphy, 2320fdc9d7b2SJohannes Berg struct ieee80211_supported_band *sband, 23211fa25e41SLuis R. Rodriguez const struct ieee80211_regdomain *regd) 23221fa25e41SLuis R. Rodriguez { 23231fa25e41SLuis R. Rodriguez unsigned int i; 23241fa25e41SLuis R. Rodriguez 2325fdc9d7b2SJohannes Berg if (!sband) 2326fdc9d7b2SJohannes Berg return; 23271fa25e41SLuis R. Rodriguez 2328c4b9d655SGanapathi Bhat /* 2329c4b9d655SGanapathi Bhat * We currently assume that you always want at least 20 MHz, 2330c4b9d655SGanapathi Bhat * otherwise channel 12 might get enabled if this rule is 2331c4b9d655SGanapathi Bhat * compatible to US, which permits 2402 - 2472 MHz. 2332c4b9d655SGanapathi Bhat */ 23331fa25e41SLuis R. Rodriguez for (i = 0; i < sband->n_channels; i++) 2334c4b9d655SGanapathi Bhat handle_channel_custom(wiphy, &sband->channels[i], regd, 2335c4b9d655SGanapathi Bhat MHZ_TO_KHZ(20)); 23361fa25e41SLuis R. Rodriguez } 23371fa25e41SLuis R. Rodriguez 23381fa25e41SLuis R. Rodriguez /* Used by drivers prior to wiphy registration */ 23391fa25e41SLuis R. Rodriguez void wiphy_apply_custom_regulatory(struct wiphy *wiphy, 23401fa25e41SLuis R. Rodriguez const struct ieee80211_regdomain *regd) 23411fa25e41SLuis R. Rodriguez { 234257fbcce3SJohannes Berg enum nl80211_band band; 2343bbcf3f02SLuis R. Rodriguez unsigned int bands_set = 0; 2344ac46d48eSLuis R. Rodriguez 2345a2f73b6cSLuis R. Rodriguez WARN(!(wiphy->regulatory_flags & REGULATORY_CUSTOM_REG), 2346a2f73b6cSLuis R. Rodriguez "wiphy should have REGULATORY_CUSTOM_REG\n"); 2347a2f73b6cSLuis R. Rodriguez wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG; 2348222ea581SLuis R. Rodriguez 234957fbcce3SJohannes Berg for (band = 0; band < NUM_NL80211_BANDS; band++) { 2350bbcf3f02SLuis R. Rodriguez if (!wiphy->bands[band]) 2351bbcf3f02SLuis R. Rodriguez continue; 2352fdc9d7b2SJohannes Berg handle_band_custom(wiphy, wiphy->bands[band], regd); 2353bbcf3f02SLuis R. Rodriguez bands_set++; 23541fa25e41SLuis R. Rodriguez } 2355bbcf3f02SLuis R. Rodriguez 2356bbcf3f02SLuis R. Rodriguez /* 2357bbcf3f02SLuis R. Rodriguez * no point in calling this if it won't have any effect 23581a919318SJohannes Berg * on your device's supported bands. 2359bbcf3f02SLuis R. Rodriguez */ 2360bbcf3f02SLuis R. Rodriguez WARN_ON(!bands_set); 23611fa25e41SLuis R. Rodriguez } 23621fa25e41SLuis R. Rodriguez EXPORT_SYMBOL(wiphy_apply_custom_regulatory); 23631fa25e41SLuis R. Rodriguez 2364b2e253cfSLuis R. Rodriguez static void reg_set_request_processed(void) 2365b2e253cfSLuis R. Rodriguez { 2366b2e253cfSLuis R. Rodriguez bool need_more_processing = false; 2367c492db37SJohannes Berg struct regulatory_request *lr = get_last_request(); 2368b2e253cfSLuis R. Rodriguez 2369c492db37SJohannes Berg lr->processed = true; 2370b2e253cfSLuis R. Rodriguez 2371b2e253cfSLuis R. Rodriguez spin_lock(®_requests_lock); 2372b2e253cfSLuis R. Rodriguez if (!list_empty(®_requests_list)) 2373b2e253cfSLuis R. Rodriguez need_more_processing = true; 2374b2e253cfSLuis R. Rodriguez spin_unlock(®_requests_lock); 2375b2e253cfSLuis R. Rodriguez 2376b6863036SJohannes Berg cancel_crda_timeout(); 2377a90c7a31SLuis R. Rodriguez 2378b2e253cfSLuis R. Rodriguez if (need_more_processing) 2379b2e253cfSLuis R. Rodriguez schedule_work(®_work); 2380b2e253cfSLuis R. Rodriguez } 2381b2e253cfSLuis R. Rodriguez 2382d1c96a9aSLuis R. Rodriguez /** 2383b3eb7f3fSLuis R. Rodriguez * reg_process_hint_core - process core regulatory requests 2384b3eb7f3fSLuis R. Rodriguez * @pending_request: a pending core regulatory request 2385b3eb7f3fSLuis R. Rodriguez * 2386b3eb7f3fSLuis R. Rodriguez * The wireless subsystem can use this function to process 2387b3eb7f3fSLuis R. Rodriguez * a regulatory request issued by the regulatory core. 2388b3eb7f3fSLuis R. Rodriguez */ 2389d34265a3SJohannes Berg static enum reg_request_treatment 2390d34265a3SJohannes Berg reg_process_hint_core(struct regulatory_request *core_request) 2391b3eb7f3fSLuis R. Rodriguez { 2392cecbb069SJohannes Berg if (reg_query_database(core_request)) { 2393b3eb7f3fSLuis R. Rodriguez core_request->intersect = false; 2394b3eb7f3fSLuis R. Rodriguez core_request->processed = false; 239505f1a3eaSLuis R. Rodriguez reg_update_last_request(core_request); 2396d34265a3SJohannes Berg return REG_REQ_OK; 239725b20dbdSJohannes Berg } 2398d34265a3SJohannes Berg 2399d34265a3SJohannes Berg return REG_REQ_IGNORE; 2400b3eb7f3fSLuis R. Rodriguez } 2401b3eb7f3fSLuis R. Rodriguez 24020d97a619SLuis R. Rodriguez static enum reg_request_treatment 24030d97a619SLuis R. Rodriguez __reg_process_hint_user(struct regulatory_request *user_request) 24040d97a619SLuis R. Rodriguez { 24050d97a619SLuis R. Rodriguez struct regulatory_request *lr = get_last_request(); 24060d97a619SLuis R. Rodriguez 24070d97a619SLuis R. Rodriguez if (reg_request_cell_base(user_request)) 24080d97a619SLuis R. Rodriguez return reg_ignore_cell_hint(user_request); 24090d97a619SLuis R. Rodriguez 24100d97a619SLuis R. Rodriguez if (reg_request_cell_base(lr)) 24110d97a619SLuis R. Rodriguez return REG_REQ_IGNORE; 24120d97a619SLuis R. Rodriguez 24130d97a619SLuis R. Rodriguez if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) 24140d97a619SLuis R. Rodriguez return REG_REQ_INTERSECT; 24150d97a619SLuis R. Rodriguez /* 24160d97a619SLuis R. Rodriguez * If the user knows better the user should set the regdom 24170d97a619SLuis R. Rodriguez * to their country before the IE is picked up 24180d97a619SLuis R. Rodriguez */ 24190d97a619SLuis R. Rodriguez if (lr->initiator == NL80211_REGDOM_SET_BY_USER && 24200d97a619SLuis R. Rodriguez lr->intersect) 24210d97a619SLuis R. Rodriguez return REG_REQ_IGNORE; 24220d97a619SLuis R. Rodriguez /* 24230d97a619SLuis R. Rodriguez * Process user requests only after previous user/driver/core 24240d97a619SLuis R. Rodriguez * requests have been processed 24250d97a619SLuis R. Rodriguez */ 24260d97a619SLuis R. Rodriguez if ((lr->initiator == NL80211_REGDOM_SET_BY_CORE || 24270d97a619SLuis R. Rodriguez lr->initiator == NL80211_REGDOM_SET_BY_DRIVER || 24280d97a619SLuis R. Rodriguez lr->initiator == NL80211_REGDOM_SET_BY_USER) && 24290d97a619SLuis R. Rodriguez regdom_changes(lr->alpha2)) 24300d97a619SLuis R. Rodriguez return REG_REQ_IGNORE; 24310d97a619SLuis R. Rodriguez 24320d97a619SLuis R. Rodriguez if (!regdom_changes(user_request->alpha2)) 24330d97a619SLuis R. Rodriguez return REG_REQ_ALREADY_SET; 24340d97a619SLuis R. Rodriguez 24350d97a619SLuis R. Rodriguez return REG_REQ_OK; 24360d97a619SLuis R. Rodriguez } 24370d97a619SLuis R. Rodriguez 24380d97a619SLuis R. Rodriguez /** 24390d97a619SLuis R. Rodriguez * reg_process_hint_user - process user regulatory requests 24400d97a619SLuis R. Rodriguez * @user_request: a pending user regulatory request 24410d97a619SLuis R. Rodriguez * 24420d97a619SLuis R. Rodriguez * The wireless subsystem can use this function to process 24430d97a619SLuis R. Rodriguez * a regulatory request initiated by userspace. 24440d97a619SLuis R. Rodriguez */ 2445d34265a3SJohannes Berg static enum reg_request_treatment 2446d34265a3SJohannes Berg reg_process_hint_user(struct regulatory_request *user_request) 24470d97a619SLuis R. Rodriguez { 24480d97a619SLuis R. Rodriguez enum reg_request_treatment treatment; 24490d97a619SLuis R. Rodriguez 24500d97a619SLuis R. Rodriguez treatment = __reg_process_hint_user(user_request); 24510d97a619SLuis R. Rodriguez if (treatment == REG_REQ_IGNORE || 2452d34265a3SJohannes Berg treatment == REG_REQ_ALREADY_SET) 2453d34265a3SJohannes Berg return REG_REQ_IGNORE; 24540d97a619SLuis R. Rodriguez 24550d97a619SLuis R. Rodriguez user_request->intersect = treatment == REG_REQ_INTERSECT; 24560d97a619SLuis R. Rodriguez user_request->processed = false; 24575ad6ef5eSLuis R. Rodriguez 2458cecbb069SJohannes Berg if (reg_query_database(user_request)) { 245905f1a3eaSLuis R. Rodriguez reg_update_last_request(user_request); 24600d97a619SLuis R. Rodriguez user_alpha2[0] = user_request->alpha2[0]; 24610d97a619SLuis R. Rodriguez user_alpha2[1] = user_request->alpha2[1]; 2462d34265a3SJohannes Berg return REG_REQ_OK; 246325b20dbdSJohannes Berg } 2464d34265a3SJohannes Berg 2465d34265a3SJohannes Berg return REG_REQ_IGNORE; 24660d97a619SLuis R. Rodriguez } 24670d97a619SLuis R. Rodriguez 246821636c7fSLuis R. Rodriguez static enum reg_request_treatment 246921636c7fSLuis R. Rodriguez __reg_process_hint_driver(struct regulatory_request *driver_request) 247021636c7fSLuis R. Rodriguez { 247121636c7fSLuis R. Rodriguez struct regulatory_request *lr = get_last_request(); 247221636c7fSLuis R. Rodriguez 247321636c7fSLuis R. Rodriguez if (lr->initiator == NL80211_REGDOM_SET_BY_CORE) { 247421636c7fSLuis R. Rodriguez if (regdom_changes(driver_request->alpha2)) 247521636c7fSLuis R. Rodriguez return REG_REQ_OK; 247621636c7fSLuis R. Rodriguez return REG_REQ_ALREADY_SET; 247721636c7fSLuis R. Rodriguez } 247821636c7fSLuis R. Rodriguez 247921636c7fSLuis R. Rodriguez /* 248021636c7fSLuis R. Rodriguez * This would happen if you unplug and plug your card 248121636c7fSLuis R. Rodriguez * back in or if you add a new device for which the previously 248221636c7fSLuis R. Rodriguez * loaded card also agrees on the regulatory domain. 248321636c7fSLuis R. Rodriguez */ 248421636c7fSLuis R. Rodriguez if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER && 248521636c7fSLuis R. Rodriguez !regdom_changes(driver_request->alpha2)) 248621636c7fSLuis R. Rodriguez return REG_REQ_ALREADY_SET; 248721636c7fSLuis R. Rodriguez 248821636c7fSLuis R. Rodriguez return REG_REQ_INTERSECT; 248921636c7fSLuis R. Rodriguez } 249021636c7fSLuis R. Rodriguez 249121636c7fSLuis R. Rodriguez /** 249221636c7fSLuis R. Rodriguez * reg_process_hint_driver - process driver regulatory requests 249321636c7fSLuis R. Rodriguez * @driver_request: a pending driver regulatory request 249421636c7fSLuis R. Rodriguez * 249521636c7fSLuis R. Rodriguez * The wireless subsystem can use this function to process 249621636c7fSLuis R. Rodriguez * a regulatory request issued by an 802.11 driver. 249721636c7fSLuis R. Rodriguez * 249821636c7fSLuis R. Rodriguez * Returns one of the different reg request treatment values. 249921636c7fSLuis R. Rodriguez */ 250021636c7fSLuis R. Rodriguez static enum reg_request_treatment 250121636c7fSLuis R. Rodriguez reg_process_hint_driver(struct wiphy *wiphy, 250221636c7fSLuis R. Rodriguez struct regulatory_request *driver_request) 250321636c7fSLuis R. Rodriguez { 250434f05f54SArik Nemtsov const struct ieee80211_regdomain *regd, *tmp; 250521636c7fSLuis R. Rodriguez enum reg_request_treatment treatment; 250621636c7fSLuis R. Rodriguez 250721636c7fSLuis R. Rodriguez treatment = __reg_process_hint_driver(driver_request); 250821636c7fSLuis R. Rodriguez 250921636c7fSLuis R. Rodriguez switch (treatment) { 251021636c7fSLuis R. Rodriguez case REG_REQ_OK: 251121636c7fSLuis R. Rodriguez break; 251221636c7fSLuis R. Rodriguez case REG_REQ_IGNORE: 2513d34265a3SJohannes Berg return REG_REQ_IGNORE; 251421636c7fSLuis R. Rodriguez case REG_REQ_INTERSECT: 251521636c7fSLuis R. Rodriguez case REG_REQ_ALREADY_SET: 251621636c7fSLuis R. Rodriguez regd = reg_copy_regd(get_cfg80211_regdom()); 2517d34265a3SJohannes Berg if (IS_ERR(regd)) 2518d34265a3SJohannes Berg return REG_REQ_IGNORE; 251934f05f54SArik Nemtsov 252034f05f54SArik Nemtsov tmp = get_wiphy_regdom(wiphy); 252121636c7fSLuis R. Rodriguez rcu_assign_pointer(wiphy->regd, regd); 252234f05f54SArik Nemtsov rcu_free_regdom(tmp); 252321636c7fSLuis R. Rodriguez } 252421636c7fSLuis R. Rodriguez 252521636c7fSLuis R. Rodriguez 252621636c7fSLuis R. Rodriguez driver_request->intersect = treatment == REG_REQ_INTERSECT; 252721636c7fSLuis R. Rodriguez driver_request->processed = false; 25285ad6ef5eSLuis R. Rodriguez 252921636c7fSLuis R. Rodriguez /* 253021636c7fSLuis R. Rodriguez * Since CRDA will not be called in this case as we already 253121636c7fSLuis R. Rodriguez * have applied the requested regulatory domain before we just 253221636c7fSLuis R. Rodriguez * inform userspace we have processed the request 253321636c7fSLuis R. Rodriguez */ 253421636c7fSLuis R. Rodriguez if (treatment == REG_REQ_ALREADY_SET) { 253521636c7fSLuis R. Rodriguez nl80211_send_reg_change_event(driver_request); 253625b20dbdSJohannes Berg reg_update_last_request(driver_request); 253721636c7fSLuis R. Rodriguez reg_set_request_processed(); 2538480908a7SJohannes Berg return REG_REQ_ALREADY_SET; 253921636c7fSLuis R. Rodriguez } 254021636c7fSLuis R. Rodriguez 2541d34265a3SJohannes Berg if (reg_query_database(driver_request)) { 254225b20dbdSJohannes Berg reg_update_last_request(driver_request); 254325b20dbdSJohannes Berg return REG_REQ_OK; 254421636c7fSLuis R. Rodriguez } 254521636c7fSLuis R. Rodriguez 2546d34265a3SJohannes Berg return REG_REQ_IGNORE; 2547d34265a3SJohannes Berg } 2548d34265a3SJohannes Berg 2549b23e7a9eSLuis R. Rodriguez static enum reg_request_treatment 2550b23e7a9eSLuis R. Rodriguez __reg_process_hint_country_ie(struct wiphy *wiphy, 2551b23e7a9eSLuis R. Rodriguez struct regulatory_request *country_ie_request) 2552b23e7a9eSLuis R. Rodriguez { 2553b23e7a9eSLuis R. Rodriguez struct wiphy *last_wiphy = NULL; 2554b23e7a9eSLuis R. Rodriguez struct regulatory_request *lr = get_last_request(); 2555b23e7a9eSLuis R. Rodriguez 2556b23e7a9eSLuis R. Rodriguez if (reg_request_cell_base(lr)) { 2557b23e7a9eSLuis R. Rodriguez /* Trust a Cell base station over the AP's country IE */ 2558b23e7a9eSLuis R. Rodriguez if (regdom_changes(country_ie_request->alpha2)) 2559b23e7a9eSLuis R. Rodriguez return REG_REQ_IGNORE; 2560b23e7a9eSLuis R. Rodriguez return REG_REQ_ALREADY_SET; 25612a901468SLuis R. Rodriguez } else { 25622a901468SLuis R. Rodriguez if (wiphy->regulatory_flags & REGULATORY_COUNTRY_IE_IGNORE) 25632a901468SLuis R. Rodriguez return REG_REQ_IGNORE; 2564b23e7a9eSLuis R. Rodriguez } 2565b23e7a9eSLuis R. Rodriguez 2566b23e7a9eSLuis R. Rodriguez if (unlikely(!is_an_alpha2(country_ie_request->alpha2))) 2567b23e7a9eSLuis R. Rodriguez return -EINVAL; 25682f1c6c57SLuis R. Rodriguez 25692f1c6c57SLuis R. Rodriguez if (lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE) 25702f1c6c57SLuis R. Rodriguez return REG_REQ_OK; 25712f1c6c57SLuis R. Rodriguez 25722f1c6c57SLuis R. Rodriguez last_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx); 25732f1c6c57SLuis R. Rodriguez 2574b23e7a9eSLuis R. Rodriguez if (last_wiphy != wiphy) { 2575b23e7a9eSLuis R. Rodriguez /* 2576b23e7a9eSLuis R. Rodriguez * Two cards with two APs claiming different 2577b23e7a9eSLuis R. Rodriguez * Country IE alpha2s. We could 2578b23e7a9eSLuis R. Rodriguez * intersect them, but that seems unlikely 2579b23e7a9eSLuis R. Rodriguez * to be correct. Reject second one for now. 2580b23e7a9eSLuis R. Rodriguez */ 2581b23e7a9eSLuis R. Rodriguez if (regdom_changes(country_ie_request->alpha2)) 2582b23e7a9eSLuis R. Rodriguez return REG_REQ_IGNORE; 2583b23e7a9eSLuis R. Rodriguez return REG_REQ_ALREADY_SET; 2584b23e7a9eSLuis R. Rodriguez } 258570dcec5aSEmmanuel Grumbach 258670dcec5aSEmmanuel Grumbach if (regdom_changes(country_ie_request->alpha2)) 2587b23e7a9eSLuis R. Rodriguez return REG_REQ_OK; 2588b23e7a9eSLuis R. Rodriguez return REG_REQ_ALREADY_SET; 2589b23e7a9eSLuis R. Rodriguez } 2590b23e7a9eSLuis R. Rodriguez 2591b3eb7f3fSLuis R. Rodriguez /** 2592b23e7a9eSLuis R. Rodriguez * reg_process_hint_country_ie - process regulatory requests from country IEs 2593b23e7a9eSLuis R. Rodriguez * @country_ie_request: a regulatory request from a country IE 2594d1c96a9aSLuis R. Rodriguez * 2595b23e7a9eSLuis R. Rodriguez * The wireless subsystem can use this function to process 2596b23e7a9eSLuis R. Rodriguez * a regulatory request issued by a country Information Element. 2597d1c96a9aSLuis R. Rodriguez * 25982f92212bSJohannes Berg * Returns one of the different reg request treatment values. 2599d1c96a9aSLuis R. Rodriguez */ 26002f92212bSJohannes Berg static enum reg_request_treatment 2601b23e7a9eSLuis R. Rodriguez reg_process_hint_country_ie(struct wiphy *wiphy, 2602b23e7a9eSLuis R. Rodriguez struct regulatory_request *country_ie_request) 2603b2e1b302SLuis R. Rodriguez { 26042f92212bSJohannes Berg enum reg_request_treatment treatment; 2605b2e1b302SLuis R. Rodriguez 2606b23e7a9eSLuis R. Rodriguez treatment = __reg_process_hint_country_ie(wiphy, country_ie_request); 2607761cf7ecSLuis R. Rodriguez 26082f92212bSJohannes Berg switch (treatment) { 26092f92212bSJohannes Berg case REG_REQ_OK: 26102f92212bSJohannes Berg break; 2611b23e7a9eSLuis R. Rodriguez case REG_REQ_IGNORE: 2612d34265a3SJohannes Berg return REG_REQ_IGNORE; 2613b23e7a9eSLuis R. Rodriguez case REG_REQ_ALREADY_SET: 2614c888393bSArik Nemtsov reg_free_request(country_ie_request); 2615480908a7SJohannes Berg return REG_REQ_ALREADY_SET; 2616b23e7a9eSLuis R. Rodriguez case REG_REQ_INTERSECT: 2617fb1fc7adSLuis R. Rodriguez /* 2618b23e7a9eSLuis R. Rodriguez * This doesn't happen yet, not sure we 2619b23e7a9eSLuis R. Rodriguez * ever want to support it for this case. 2620fb1fc7adSLuis R. Rodriguez */ 26218db0c433SToke Høiland-Jørgensen WARN_ONCE(1, "Unexpected intersection for country elements"); 2622d34265a3SJohannes Berg return REG_REQ_IGNORE; 2623d951c1ddSLuis R. Rodriguez } 2624b2e1b302SLuis R. Rodriguez 2625b23e7a9eSLuis R. Rodriguez country_ie_request->intersect = false; 2626b23e7a9eSLuis R. Rodriguez country_ie_request->processed = false; 26275ad6ef5eSLuis R. Rodriguez 2628d34265a3SJohannes Berg if (reg_query_database(country_ie_request)) { 262905f1a3eaSLuis R. Rodriguez reg_update_last_request(country_ie_request); 263025b20dbdSJohannes Berg return REG_REQ_OK; 2631b2e1b302SLuis R. Rodriguez } 2632b2e1b302SLuis R. Rodriguez 2633d34265a3SJohannes Berg return REG_REQ_IGNORE; 2634d34265a3SJohannes Berg } 2635d34265a3SJohannes Berg 263689766727SVasanthakumar Thiagarajan bool reg_dfs_domain_same(struct wiphy *wiphy1, struct wiphy *wiphy2) 263789766727SVasanthakumar Thiagarajan { 263889766727SVasanthakumar Thiagarajan const struct ieee80211_regdomain *wiphy1_regd = NULL; 263989766727SVasanthakumar Thiagarajan const struct ieee80211_regdomain *wiphy2_regd = NULL; 264089766727SVasanthakumar Thiagarajan const struct ieee80211_regdomain *cfg80211_regd = NULL; 264189766727SVasanthakumar Thiagarajan bool dfs_domain_same; 264289766727SVasanthakumar Thiagarajan 264389766727SVasanthakumar Thiagarajan rcu_read_lock(); 264489766727SVasanthakumar Thiagarajan 264589766727SVasanthakumar Thiagarajan cfg80211_regd = rcu_dereference(cfg80211_regdomain); 264689766727SVasanthakumar Thiagarajan wiphy1_regd = rcu_dereference(wiphy1->regd); 264789766727SVasanthakumar Thiagarajan if (!wiphy1_regd) 264889766727SVasanthakumar Thiagarajan wiphy1_regd = cfg80211_regd; 264989766727SVasanthakumar Thiagarajan 265089766727SVasanthakumar Thiagarajan wiphy2_regd = rcu_dereference(wiphy2->regd); 265189766727SVasanthakumar Thiagarajan if (!wiphy2_regd) 265289766727SVasanthakumar Thiagarajan wiphy2_regd = cfg80211_regd; 265389766727SVasanthakumar Thiagarajan 265489766727SVasanthakumar Thiagarajan dfs_domain_same = wiphy1_regd->dfs_region == wiphy2_regd->dfs_region; 265589766727SVasanthakumar Thiagarajan 265689766727SVasanthakumar Thiagarajan rcu_read_unlock(); 265789766727SVasanthakumar Thiagarajan 265889766727SVasanthakumar Thiagarajan return dfs_domain_same; 265989766727SVasanthakumar Thiagarajan } 266089766727SVasanthakumar Thiagarajan 266189766727SVasanthakumar Thiagarajan static void reg_copy_dfs_chan_state(struct ieee80211_channel *dst_chan, 266289766727SVasanthakumar Thiagarajan struct ieee80211_channel *src_chan) 266389766727SVasanthakumar Thiagarajan { 266489766727SVasanthakumar Thiagarajan if (!(dst_chan->flags & IEEE80211_CHAN_RADAR) || 266589766727SVasanthakumar Thiagarajan !(src_chan->flags & IEEE80211_CHAN_RADAR)) 266689766727SVasanthakumar Thiagarajan return; 266789766727SVasanthakumar Thiagarajan 266889766727SVasanthakumar Thiagarajan if (dst_chan->flags & IEEE80211_CHAN_DISABLED || 266989766727SVasanthakumar Thiagarajan src_chan->flags & IEEE80211_CHAN_DISABLED) 267089766727SVasanthakumar Thiagarajan return; 267189766727SVasanthakumar Thiagarajan 267289766727SVasanthakumar Thiagarajan if (src_chan->center_freq == dst_chan->center_freq && 267389766727SVasanthakumar Thiagarajan dst_chan->dfs_state == NL80211_DFS_USABLE) { 267489766727SVasanthakumar Thiagarajan dst_chan->dfs_state = src_chan->dfs_state; 267589766727SVasanthakumar Thiagarajan dst_chan->dfs_state_entered = src_chan->dfs_state_entered; 267689766727SVasanthakumar Thiagarajan } 267789766727SVasanthakumar Thiagarajan } 267889766727SVasanthakumar Thiagarajan 267989766727SVasanthakumar Thiagarajan static void wiphy_share_dfs_chan_state(struct wiphy *dst_wiphy, 268089766727SVasanthakumar Thiagarajan struct wiphy *src_wiphy) 268189766727SVasanthakumar Thiagarajan { 268289766727SVasanthakumar Thiagarajan struct ieee80211_supported_band *src_sband, *dst_sband; 268389766727SVasanthakumar Thiagarajan struct ieee80211_channel *src_chan, *dst_chan; 268489766727SVasanthakumar Thiagarajan int i, j, band; 268589766727SVasanthakumar Thiagarajan 268689766727SVasanthakumar Thiagarajan if (!reg_dfs_domain_same(dst_wiphy, src_wiphy)) 268789766727SVasanthakumar Thiagarajan return; 268889766727SVasanthakumar Thiagarajan 268989766727SVasanthakumar Thiagarajan for (band = 0; band < NUM_NL80211_BANDS; band++) { 269089766727SVasanthakumar Thiagarajan dst_sband = dst_wiphy->bands[band]; 269189766727SVasanthakumar Thiagarajan src_sband = src_wiphy->bands[band]; 269289766727SVasanthakumar Thiagarajan if (!dst_sband || !src_sband) 269389766727SVasanthakumar Thiagarajan continue; 269489766727SVasanthakumar Thiagarajan 269589766727SVasanthakumar Thiagarajan for (i = 0; i < dst_sband->n_channels; i++) { 269689766727SVasanthakumar Thiagarajan dst_chan = &dst_sband->channels[i]; 269789766727SVasanthakumar Thiagarajan for (j = 0; j < src_sband->n_channels; j++) { 269889766727SVasanthakumar Thiagarajan src_chan = &src_sband->channels[j]; 269989766727SVasanthakumar Thiagarajan reg_copy_dfs_chan_state(dst_chan, src_chan); 270089766727SVasanthakumar Thiagarajan } 270189766727SVasanthakumar Thiagarajan } 270289766727SVasanthakumar Thiagarajan } 270389766727SVasanthakumar Thiagarajan } 270489766727SVasanthakumar Thiagarajan 270589766727SVasanthakumar Thiagarajan static void wiphy_all_share_dfs_chan_state(struct wiphy *wiphy) 270689766727SVasanthakumar Thiagarajan { 270789766727SVasanthakumar Thiagarajan struct cfg80211_registered_device *rdev; 270889766727SVasanthakumar Thiagarajan 270989766727SVasanthakumar Thiagarajan ASSERT_RTNL(); 271089766727SVasanthakumar Thiagarajan 271189766727SVasanthakumar Thiagarajan list_for_each_entry(rdev, &cfg80211_rdev_list, list) { 271289766727SVasanthakumar Thiagarajan if (wiphy == &rdev->wiphy) 271389766727SVasanthakumar Thiagarajan continue; 271489766727SVasanthakumar Thiagarajan wiphy_share_dfs_chan_state(wiphy, &rdev->wiphy); 271589766727SVasanthakumar Thiagarajan } 271689766727SVasanthakumar Thiagarajan } 271789766727SVasanthakumar Thiagarajan 271830a548c7SLuis R. Rodriguez /* This processes *all* regulatory hints */ 27191daa37c7SLuis R. Rodriguez static void reg_process_hint(struct regulatory_request *reg_request) 2720fe33eb39SLuis R. Rodriguez { 2721fe33eb39SLuis R. Rodriguez struct wiphy *wiphy = NULL; 2722b3eb7f3fSLuis R. Rodriguez enum reg_request_treatment treatment; 27231db58529SYu Zhao enum nl80211_reg_initiator initiator = reg_request->initiator; 2724fe33eb39SLuis R. Rodriguez 2725f4173766SJohannes Berg if (reg_request->wiphy_idx != WIPHY_IDX_INVALID) 2726fe33eb39SLuis R. Rodriguez wiphy = wiphy_idx_to_wiphy(reg_request->wiphy_idx); 2727fe33eb39SLuis R. Rodriguez 27281db58529SYu Zhao switch (initiator) { 2729b3eb7f3fSLuis R. Rodriguez case NL80211_REGDOM_SET_BY_CORE: 2730d34265a3SJohannes Berg treatment = reg_process_hint_core(reg_request); 2731d34265a3SJohannes Berg break; 2732b3eb7f3fSLuis R. Rodriguez case NL80211_REGDOM_SET_BY_USER: 2733d34265a3SJohannes Berg treatment = reg_process_hint_user(reg_request); 2734d34265a3SJohannes Berg break; 2735b3eb7f3fSLuis R. Rodriguez case NL80211_REGDOM_SET_BY_DRIVER: 2736772f0389SIlan Peer if (!wiphy) 2737772f0389SIlan Peer goto out_free; 273821636c7fSLuis R. Rodriguez treatment = reg_process_hint_driver(wiphy, reg_request); 273921636c7fSLuis R. Rodriguez break; 2740b3eb7f3fSLuis R. Rodriguez case NL80211_REGDOM_SET_BY_COUNTRY_IE: 2741772f0389SIlan Peer if (!wiphy) 2742772f0389SIlan Peer goto out_free; 2743b23e7a9eSLuis R. Rodriguez treatment = reg_process_hint_country_ie(wiphy, reg_request); 2744b3eb7f3fSLuis R. Rodriguez break; 2745b3eb7f3fSLuis R. Rodriguez default: 27461db58529SYu Zhao WARN(1, "invalid initiator %d\n", initiator); 2747772f0389SIlan Peer goto out_free; 2748b3eb7f3fSLuis R. Rodriguez } 2749b3eb7f3fSLuis R. Rodriguez 2750d34265a3SJohannes Berg if (treatment == REG_REQ_IGNORE) 2751d34265a3SJohannes Berg goto out_free; 2752d34265a3SJohannes Berg 2753480908a7SJohannes Berg WARN(treatment != REG_REQ_OK && treatment != REG_REQ_ALREADY_SET, 2754480908a7SJohannes Berg "unexpected treatment value %d\n", treatment); 2755480908a7SJohannes Berg 2756841b351cSJohn Linville /* This is required so that the orig_* parameters are saved. 2757841b351cSJohn Linville * NOTE: treatment must be set for any case that reaches here! 2758841b351cSJohn Linville */ 2759b23e7a9eSLuis R. Rodriguez if (treatment == REG_REQ_ALREADY_SET && wiphy && 2760ad932f04SArik Nemtsov wiphy->regulatory_flags & REGULATORY_STRICT_REG) { 27611db58529SYu Zhao wiphy_update_regulatory(wiphy, initiator); 276289766727SVasanthakumar Thiagarajan wiphy_all_share_dfs_chan_state(wiphy); 2763ad932f04SArik Nemtsov reg_check_channels(); 2764ad932f04SArik Nemtsov } 2765772f0389SIlan Peer 2766772f0389SIlan Peer return; 2767772f0389SIlan Peer 2768772f0389SIlan Peer out_free: 2769c888393bSArik Nemtsov reg_free_request(reg_request); 2770fe33eb39SLuis R. Rodriguez } 2771fe33eb39SLuis R. Rodriguez 2772aced43ceSAmar Singhal static void notify_self_managed_wiphys(struct regulatory_request *request) 2773aced43ceSAmar Singhal { 2774aced43ceSAmar Singhal struct cfg80211_registered_device *rdev; 2775aced43ceSAmar Singhal struct wiphy *wiphy; 2776aced43ceSAmar Singhal 2777aced43ceSAmar Singhal list_for_each_entry(rdev, &cfg80211_rdev_list, list) { 2778aced43ceSAmar Singhal wiphy = &rdev->wiphy; 2779aced43ceSAmar Singhal if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED && 2780c82c06ceSSriram R request->initiator == NL80211_REGDOM_SET_BY_USER) 2781aced43ceSAmar Singhal reg_call_notifier(wiphy, request); 2782aced43ceSAmar Singhal } 2783aced43ceSAmar Singhal } 2784aced43ceSAmar Singhal 2785b2e253cfSLuis R. Rodriguez /* 2786b2e253cfSLuis R. Rodriguez * Processes regulatory hints, this is all the NL80211_REGDOM_SET_BY_* 2787b2e253cfSLuis R. Rodriguez * Regulatory hints come on a first come first serve basis and we 2788b2e253cfSLuis R. Rodriguez * must process each one atomically. 2789b2e253cfSLuis R. Rodriguez */ 2790fe33eb39SLuis R. Rodriguez static void reg_process_pending_hints(void) 2791fe33eb39SLuis R. Rodriguez { 2792c492db37SJohannes Berg struct regulatory_request *reg_request, *lr; 2793fe33eb39SLuis R. Rodriguez 2794c492db37SJohannes Berg lr = get_last_request(); 2795b0e2880bSLuis R. Rodriguez 2796b2e253cfSLuis R. Rodriguez /* When last_request->processed becomes true this will be rescheduled */ 2797c492db37SJohannes Berg if (lr && !lr->processed) { 27980d31d4dbSHodaszi, Robert pr_debug("Pending regulatory request, waiting for it to be processed...\n"); 27995fe231e8SJohannes Berg return; 2800b2e253cfSLuis R. Rodriguez } 2801b2e253cfSLuis R. Rodriguez 2802fe33eb39SLuis R. Rodriguez spin_lock(®_requests_lock); 2803b2e253cfSLuis R. Rodriguez 2804b2e253cfSLuis R. Rodriguez if (list_empty(®_requests_list)) { 2805b2e253cfSLuis R. Rodriguez spin_unlock(®_requests_lock); 28065fe231e8SJohannes Berg return; 2807b2e253cfSLuis R. Rodriguez } 2808b2e253cfSLuis R. Rodriguez 2809fe33eb39SLuis R. Rodriguez reg_request = list_first_entry(®_requests_list, 2810fe33eb39SLuis R. Rodriguez struct regulatory_request, 2811fe33eb39SLuis R. Rodriguez list); 2812fe33eb39SLuis R. Rodriguez list_del_init(®_request->list); 2813fe33eb39SLuis R. Rodriguez 2814d951c1ddSLuis R. Rodriguez spin_unlock(®_requests_lock); 2815b0e2880bSLuis R. Rodriguez 2816aced43ceSAmar Singhal notify_self_managed_wiphys(reg_request); 2817ef51fb1dSArik Nemtsov 28181daa37c7SLuis R. Rodriguez reg_process_hint(reg_request); 28192e54a689SBen 28202e54a689SBen lr = get_last_request(); 28212e54a689SBen 28222e54a689SBen spin_lock(®_requests_lock); 28232e54a689SBen if (!list_empty(®_requests_list) && lr && lr->processed) 28242e54a689SBen schedule_work(®_work); 28252e54a689SBen spin_unlock(®_requests_lock); 2826fe33eb39SLuis R. Rodriguez } 2827fe33eb39SLuis R. Rodriguez 2828e38f8a7aSLuis R. Rodriguez /* Processes beacon hints -- this has nothing to do with country IEs */ 2829e38f8a7aSLuis R. Rodriguez static void reg_process_pending_beacon_hints(void) 2830e38f8a7aSLuis R. Rodriguez { 283179c97e97SJohannes Berg struct cfg80211_registered_device *rdev; 2832e38f8a7aSLuis R. Rodriguez struct reg_beacon *pending_beacon, *tmp; 2833e38f8a7aSLuis R. Rodriguez 2834e38f8a7aSLuis R. Rodriguez /* This goes through the _pending_ beacon list */ 2835e38f8a7aSLuis R. Rodriguez spin_lock_bh(®_pending_beacons_lock); 2836e38f8a7aSLuis R. Rodriguez 2837e38f8a7aSLuis R. Rodriguez list_for_each_entry_safe(pending_beacon, tmp, 2838e38f8a7aSLuis R. Rodriguez ®_pending_beacons, list) { 2839e38f8a7aSLuis R. Rodriguez list_del_init(&pending_beacon->list); 2840e38f8a7aSLuis R. Rodriguez 2841e38f8a7aSLuis R. Rodriguez /* Applies the beacon hint to current wiphys */ 284279c97e97SJohannes Berg list_for_each_entry(rdev, &cfg80211_rdev_list, list) 284379c97e97SJohannes Berg wiphy_update_new_beacon(&rdev->wiphy, pending_beacon); 2844e38f8a7aSLuis R. Rodriguez 2845e38f8a7aSLuis R. Rodriguez /* Remembers the beacon hint for new wiphys or reg changes */ 2846e38f8a7aSLuis R. Rodriguez list_add_tail(&pending_beacon->list, ®_beacon_list); 2847e38f8a7aSLuis R. Rodriguez } 2848e38f8a7aSLuis R. Rodriguez 2849e38f8a7aSLuis R. Rodriguez spin_unlock_bh(®_pending_beacons_lock); 2850e38f8a7aSLuis R. Rodriguez } 2851e38f8a7aSLuis R. Rodriguez 2852b0d7aa59SJonathan Doron static void reg_process_self_managed_hints(void) 2853b0d7aa59SJonathan Doron { 2854b0d7aa59SJonathan Doron struct cfg80211_registered_device *rdev; 2855b0d7aa59SJonathan Doron struct wiphy *wiphy; 2856b0d7aa59SJonathan Doron const struct ieee80211_regdomain *tmp; 2857b0d7aa59SJonathan Doron const struct ieee80211_regdomain *regd; 285857fbcce3SJohannes Berg enum nl80211_band band; 2859b0d7aa59SJonathan Doron struct regulatory_request request = {}; 2860b0d7aa59SJonathan Doron 2861b0d7aa59SJonathan Doron list_for_each_entry(rdev, &cfg80211_rdev_list, list) { 2862b0d7aa59SJonathan Doron wiphy = &rdev->wiphy; 2863b0d7aa59SJonathan Doron 2864b0d7aa59SJonathan Doron spin_lock(®_requests_lock); 2865b0d7aa59SJonathan Doron regd = rdev->requested_regd; 2866b0d7aa59SJonathan Doron rdev->requested_regd = NULL; 2867b0d7aa59SJonathan Doron spin_unlock(®_requests_lock); 2868b0d7aa59SJonathan Doron 2869b0d7aa59SJonathan Doron if (regd == NULL) 2870b0d7aa59SJonathan Doron continue; 2871b0d7aa59SJonathan Doron 2872b0d7aa59SJonathan Doron tmp = get_wiphy_regdom(wiphy); 2873b0d7aa59SJonathan Doron rcu_assign_pointer(wiphy->regd, regd); 2874b0d7aa59SJonathan Doron rcu_free_regdom(tmp); 2875b0d7aa59SJonathan Doron 287657fbcce3SJohannes Berg for (band = 0; band < NUM_NL80211_BANDS; band++) 2877b0d7aa59SJonathan Doron handle_band_custom(wiphy, wiphy->bands[band], regd); 2878b0d7aa59SJonathan Doron 2879b0d7aa59SJonathan Doron reg_process_ht_flags(wiphy); 2880b0d7aa59SJonathan Doron 2881b0d7aa59SJonathan Doron request.wiphy_idx = get_wiphy_idx(wiphy); 2882b0d7aa59SJonathan Doron request.alpha2[0] = regd->alpha2[0]; 2883b0d7aa59SJonathan Doron request.alpha2[1] = regd->alpha2[1]; 2884b0d7aa59SJonathan Doron request.initiator = NL80211_REGDOM_SET_BY_DRIVER; 2885b0d7aa59SJonathan Doron 2886b0d7aa59SJonathan Doron nl80211_send_wiphy_reg_change_event(&request); 2887b0d7aa59SJonathan Doron } 2888b0d7aa59SJonathan Doron 2889b0d7aa59SJonathan Doron reg_check_channels(); 2890b0d7aa59SJonathan Doron } 2891b0d7aa59SJonathan Doron 2892fe33eb39SLuis R. Rodriguez static void reg_todo(struct work_struct *work) 2893fe33eb39SLuis R. Rodriguez { 28945fe231e8SJohannes Berg rtnl_lock(); 2895fe33eb39SLuis R. Rodriguez reg_process_pending_hints(); 2896e38f8a7aSLuis R. Rodriguez reg_process_pending_beacon_hints(); 2897b0d7aa59SJonathan Doron reg_process_self_managed_hints(); 28985fe231e8SJohannes Berg rtnl_unlock(); 2899fe33eb39SLuis R. Rodriguez } 2900fe33eb39SLuis R. Rodriguez 2901fe33eb39SLuis R. Rodriguez static void queue_regulatory_request(struct regulatory_request *request) 2902fe33eb39SLuis R. Rodriguez { 2903c61029c7SJohn W. Linville request->alpha2[0] = toupper(request->alpha2[0]); 2904c61029c7SJohn W. Linville request->alpha2[1] = toupper(request->alpha2[1]); 2905c61029c7SJohn W. Linville 2906fe33eb39SLuis R. Rodriguez spin_lock(®_requests_lock); 2907fe33eb39SLuis R. Rodriguez list_add_tail(&request->list, ®_requests_list); 2908fe33eb39SLuis R. Rodriguez spin_unlock(®_requests_lock); 2909fe33eb39SLuis R. Rodriguez 2910fe33eb39SLuis R. Rodriguez schedule_work(®_work); 2911fe33eb39SLuis R. Rodriguez } 2912fe33eb39SLuis R. Rodriguez 291309d989d1SLuis R. Rodriguez /* 291409d989d1SLuis R. Rodriguez * Core regulatory hint -- happens during cfg80211_init() 291509d989d1SLuis R. Rodriguez * and when we restore regulatory settings. 291609d989d1SLuis R. Rodriguez */ 2917ba25c141SLuis R. Rodriguez static int regulatory_hint_core(const char *alpha2) 2918ba25c141SLuis R. Rodriguez { 2919ba25c141SLuis R. Rodriguez struct regulatory_request *request; 2920ba25c141SLuis R. Rodriguez 29211a919318SJohannes Berg request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); 2922ba25c141SLuis R. Rodriguez if (!request) 2923ba25c141SLuis R. Rodriguez return -ENOMEM; 2924ba25c141SLuis R. Rodriguez 2925ba25c141SLuis R. Rodriguez request->alpha2[0] = alpha2[0]; 2926ba25c141SLuis R. Rodriguez request->alpha2[1] = alpha2[1]; 29277db90f4aSLuis R. Rodriguez request->initiator = NL80211_REGDOM_SET_BY_CORE; 292824f33e64SAndrei Otcheretianski request->wiphy_idx = WIPHY_IDX_INVALID; 2929ba25c141SLuis R. Rodriguez 293031e99729SLuis R. Rodriguez queue_regulatory_request(request); 29315078b2e3SLuis R. Rodriguez 2932fe33eb39SLuis R. Rodriguez return 0; 2933ba25c141SLuis R. Rodriguez } 2934ba25c141SLuis R. Rodriguez 2935fe33eb39SLuis R. Rodriguez /* User hints */ 293657b5ce07SLuis R. Rodriguez int regulatory_hint_user(const char *alpha2, 293757b5ce07SLuis R. Rodriguez enum nl80211_user_reg_hint_type user_reg_hint_type) 2938b2e1b302SLuis R. Rodriguez { 2939fe33eb39SLuis R. Rodriguez struct regulatory_request *request; 2940fe33eb39SLuis R. Rodriguez 2941fdc9d7b2SJohannes Berg if (WARN_ON(!alpha2)) 2942fdc9d7b2SJohannes Berg return -EINVAL; 2943b2e1b302SLuis R. Rodriguez 2944fe33eb39SLuis R. Rodriguez request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); 2945fe33eb39SLuis R. Rodriguez if (!request) 2946fe33eb39SLuis R. Rodriguez return -ENOMEM; 2947fe33eb39SLuis R. Rodriguez 2948f4173766SJohannes Berg request->wiphy_idx = WIPHY_IDX_INVALID; 2949fe33eb39SLuis R. Rodriguez request->alpha2[0] = alpha2[0]; 2950fe33eb39SLuis R. Rodriguez request->alpha2[1] = alpha2[1]; 2951e12822e1SLuis R. Rodriguez request->initiator = NL80211_REGDOM_SET_BY_USER; 295257b5ce07SLuis R. Rodriguez request->user_reg_hint_type = user_reg_hint_type; 2953fe33eb39SLuis R. Rodriguez 2954c37722bdSIlan peer /* Allow calling CRDA again */ 2955b6863036SJohannes Berg reset_crda_timeouts(); 2956c37722bdSIlan peer 2957fe33eb39SLuis R. Rodriguez queue_regulatory_request(request); 2958fe33eb39SLuis R. Rodriguez 2959fe33eb39SLuis R. Rodriguez return 0; 2960fe33eb39SLuis R. Rodriguez } 2961fe33eb39SLuis R. Rodriguez 296205050753SIlan peer int regulatory_hint_indoor(bool is_indoor, u32 portid) 296352616f2bSIlan Peer { 296405050753SIlan peer spin_lock(®_indoor_lock); 296552616f2bSIlan Peer 296605050753SIlan peer /* It is possible that more than one user space process is trying to 296705050753SIlan peer * configure the indoor setting. To handle such cases, clear the indoor 296805050753SIlan peer * setting in case that some process does not think that the device 296905050753SIlan peer * is operating in an indoor environment. In addition, if a user space 297005050753SIlan peer * process indicates that it is controlling the indoor setting, save its 297105050753SIlan peer * portid, i.e., make it the owner. 297205050753SIlan peer */ 297305050753SIlan peer reg_is_indoor = is_indoor; 297405050753SIlan peer if (reg_is_indoor) { 297505050753SIlan peer if (!reg_is_indoor_portid) 297605050753SIlan peer reg_is_indoor_portid = portid; 297705050753SIlan peer } else { 297805050753SIlan peer reg_is_indoor_portid = 0; 297905050753SIlan peer } 298052616f2bSIlan Peer 298105050753SIlan peer spin_unlock(®_indoor_lock); 298205050753SIlan peer 298305050753SIlan peer if (!is_indoor) 298405050753SIlan peer reg_check_channels(); 298552616f2bSIlan Peer 298652616f2bSIlan Peer return 0; 298752616f2bSIlan Peer } 298852616f2bSIlan Peer 298905050753SIlan peer void regulatory_netlink_notify(u32 portid) 299005050753SIlan peer { 299105050753SIlan peer spin_lock(®_indoor_lock); 299205050753SIlan peer 299305050753SIlan peer if (reg_is_indoor_portid != portid) { 299405050753SIlan peer spin_unlock(®_indoor_lock); 299505050753SIlan peer return; 299605050753SIlan peer } 299705050753SIlan peer 299805050753SIlan peer reg_is_indoor = false; 299905050753SIlan peer reg_is_indoor_portid = 0; 300005050753SIlan peer 300105050753SIlan peer spin_unlock(®_indoor_lock); 300205050753SIlan peer 300305050753SIlan peer reg_check_channels(); 300405050753SIlan peer } 300505050753SIlan peer 3006fe33eb39SLuis R. Rodriguez /* Driver hints */ 3007fe33eb39SLuis R. Rodriguez int regulatory_hint(struct wiphy *wiphy, const char *alpha2) 3008fe33eb39SLuis R. Rodriguez { 3009fe33eb39SLuis R. Rodriguez struct regulatory_request *request; 3010fe33eb39SLuis R. Rodriguez 3011fdc9d7b2SJohannes Berg if (WARN_ON(!alpha2 || !wiphy)) 3012fdc9d7b2SJohannes Berg return -EINVAL; 3013fe33eb39SLuis R. Rodriguez 30144f7b9140SLuis R. Rodriguez wiphy->regulatory_flags &= ~REGULATORY_CUSTOM_REG; 30154f7b9140SLuis R. Rodriguez 3016fe33eb39SLuis R. Rodriguez request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); 3017fe33eb39SLuis R. Rodriguez if (!request) 3018fe33eb39SLuis R. Rodriguez return -ENOMEM; 3019fe33eb39SLuis R. Rodriguez 3020fe33eb39SLuis R. Rodriguez request->wiphy_idx = get_wiphy_idx(wiphy); 3021fe33eb39SLuis R. Rodriguez 3022fe33eb39SLuis R. Rodriguez request->alpha2[0] = alpha2[0]; 3023fe33eb39SLuis R. Rodriguez request->alpha2[1] = alpha2[1]; 30247db90f4aSLuis R. Rodriguez request->initiator = NL80211_REGDOM_SET_BY_DRIVER; 3025fe33eb39SLuis R. Rodriguez 3026c37722bdSIlan peer /* Allow calling CRDA again */ 3027b6863036SJohannes Berg reset_crda_timeouts(); 3028c37722bdSIlan peer 3029fe33eb39SLuis R. Rodriguez queue_regulatory_request(request); 3030fe33eb39SLuis R. Rodriguez 3031fe33eb39SLuis R. Rodriguez return 0; 3032b2e1b302SLuis R. Rodriguez } 3033b2e1b302SLuis R. Rodriguez EXPORT_SYMBOL(regulatory_hint); 3034b2e1b302SLuis R. Rodriguez 303557fbcce3SJohannes Berg void regulatory_hint_country_ie(struct wiphy *wiphy, enum nl80211_band band, 30361a919318SJohannes Berg const u8 *country_ie, u8 country_ie_len) 30373f2355cbSLuis R. Rodriguez { 30383f2355cbSLuis R. Rodriguez char alpha2[2]; 30393f2355cbSLuis R. Rodriguez enum environment_cap env = ENVIRON_ANY; 3040db2424c5SJohannes Berg struct regulatory_request *request = NULL, *lr; 3041d335fe63SLuis R. Rodriguez 30423f2355cbSLuis R. Rodriguez /* IE len must be evenly divisible by 2 */ 30433f2355cbSLuis R. Rodriguez if (country_ie_len & 0x01) 3044db2424c5SJohannes Berg return; 30453f2355cbSLuis R. Rodriguez 30463f2355cbSLuis R. Rodriguez if (country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN) 3047db2424c5SJohannes Berg return; 3048db2424c5SJohannes Berg 3049db2424c5SJohannes Berg request = kzalloc(sizeof(*request), GFP_KERNEL); 3050db2424c5SJohannes Berg if (!request) 3051db2424c5SJohannes Berg return; 30523f2355cbSLuis R. Rodriguez 30533f2355cbSLuis R. Rodriguez alpha2[0] = country_ie[0]; 30543f2355cbSLuis R. Rodriguez alpha2[1] = country_ie[1]; 30553f2355cbSLuis R. Rodriguez 30563f2355cbSLuis R. Rodriguez if (country_ie[2] == 'I') 30573f2355cbSLuis R. Rodriguez env = ENVIRON_INDOOR; 30583f2355cbSLuis R. Rodriguez else if (country_ie[2] == 'O') 30593f2355cbSLuis R. Rodriguez env = ENVIRON_OUTDOOR; 30603f2355cbSLuis R. Rodriguez 3061db2424c5SJohannes Berg rcu_read_lock(); 3062db2424c5SJohannes Berg lr = get_last_request(); 3063db2424c5SJohannes Berg 3064db2424c5SJohannes Berg if (unlikely(!lr)) 3065db2424c5SJohannes Berg goto out; 3066db2424c5SJohannes Berg 3067fb1fc7adSLuis R. Rodriguez /* 30688b19e6caSLuis R. Rodriguez * We will run this only upon a successful connection on cfg80211. 30694b44c8bcSLuis R. Rodriguez * We leave conflict resolution to the workqueue, where can hold 30705fe231e8SJohannes Berg * the RTNL. 3071fb1fc7adSLuis R. Rodriguez */ 3072c492db37SJohannes Berg if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE && 3073c492db37SJohannes Berg lr->wiphy_idx != WIPHY_IDX_INVALID) 30743f2355cbSLuis R. Rodriguez goto out; 30753f2355cbSLuis R. Rodriguez 3076fe33eb39SLuis R. Rodriguez request->wiphy_idx = get_wiphy_idx(wiphy); 30774f366c5dSJohn W. Linville request->alpha2[0] = alpha2[0]; 30784f366c5dSJohn W. Linville request->alpha2[1] = alpha2[1]; 30797db90f4aSLuis R. Rodriguez request->initiator = NL80211_REGDOM_SET_BY_COUNTRY_IE; 3080fe33eb39SLuis R. Rodriguez request->country_ie_env = env; 30813f2355cbSLuis R. Rodriguez 3082c37722bdSIlan peer /* Allow calling CRDA again */ 3083b6863036SJohannes Berg reset_crda_timeouts(); 3084c37722bdSIlan peer 3085fe33eb39SLuis R. Rodriguez queue_regulatory_request(request); 3086db2424c5SJohannes Berg request = NULL; 30873f2355cbSLuis R. Rodriguez out: 3088db2424c5SJohannes Berg kfree(request); 3089db2424c5SJohannes Berg rcu_read_unlock(); 30903f2355cbSLuis R. Rodriguez } 3091b2e1b302SLuis R. Rodriguez 309209d989d1SLuis R. Rodriguez static void restore_alpha2(char *alpha2, bool reset_user) 309309d989d1SLuis R. Rodriguez { 309409d989d1SLuis R. Rodriguez /* indicates there is no alpha2 to consider for restoration */ 309509d989d1SLuis R. Rodriguez alpha2[0] = '9'; 309609d989d1SLuis R. Rodriguez alpha2[1] = '7'; 309709d989d1SLuis R. Rodriguez 309809d989d1SLuis R. Rodriguez /* The user setting has precedence over the module parameter */ 309909d989d1SLuis R. Rodriguez if (is_user_regdom_saved()) { 310009d989d1SLuis R. Rodriguez /* Unless we're asked to ignore it and reset it */ 310109d989d1SLuis R. Rodriguez if (reset_user) { 3102c799ba6eSJohannes Berg pr_debug("Restoring regulatory settings including user preference\n"); 310309d989d1SLuis R. Rodriguez user_alpha2[0] = '9'; 310409d989d1SLuis R. Rodriguez user_alpha2[1] = '7'; 310509d989d1SLuis R. Rodriguez 310609d989d1SLuis R. Rodriguez /* 310709d989d1SLuis R. Rodriguez * If we're ignoring user settings, we still need to 310809d989d1SLuis R. Rodriguez * check the module parameter to ensure we put things 310909d989d1SLuis R. Rodriguez * back as they were for a full restore. 311009d989d1SLuis R. Rodriguez */ 311109d989d1SLuis R. Rodriguez if (!is_world_regdom(ieee80211_regdom)) { 3112c799ba6eSJohannes Berg pr_debug("Keeping preference on module parameter ieee80211_regdom: %c%c\n", 31131a919318SJohannes Berg ieee80211_regdom[0], ieee80211_regdom[1]); 311409d989d1SLuis R. Rodriguez alpha2[0] = ieee80211_regdom[0]; 311509d989d1SLuis R. Rodriguez alpha2[1] = ieee80211_regdom[1]; 311609d989d1SLuis R. Rodriguez } 311709d989d1SLuis R. Rodriguez } else { 3118c799ba6eSJohannes Berg pr_debug("Restoring regulatory settings while preserving user preference for: %c%c\n", 31191a919318SJohannes Berg user_alpha2[0], user_alpha2[1]); 312009d989d1SLuis R. Rodriguez alpha2[0] = user_alpha2[0]; 312109d989d1SLuis R. Rodriguez alpha2[1] = user_alpha2[1]; 312209d989d1SLuis R. Rodriguez } 312309d989d1SLuis R. Rodriguez } else if (!is_world_regdom(ieee80211_regdom)) { 3124c799ba6eSJohannes Berg pr_debug("Keeping preference on module parameter ieee80211_regdom: %c%c\n", 31251a919318SJohannes Berg ieee80211_regdom[0], ieee80211_regdom[1]); 312609d989d1SLuis R. Rodriguez alpha2[0] = ieee80211_regdom[0]; 312709d989d1SLuis R. Rodriguez alpha2[1] = ieee80211_regdom[1]; 312809d989d1SLuis R. Rodriguez } else 3129c799ba6eSJohannes Berg pr_debug("Restoring regulatory settings\n"); 313009d989d1SLuis R. Rodriguez } 313109d989d1SLuis R. Rodriguez 31325ce543d1SRajkumar Manoharan static void restore_custom_reg_settings(struct wiphy *wiphy) 31335ce543d1SRajkumar Manoharan { 31345ce543d1SRajkumar Manoharan struct ieee80211_supported_band *sband; 313557fbcce3SJohannes Berg enum nl80211_band band; 31365ce543d1SRajkumar Manoharan struct ieee80211_channel *chan; 31375ce543d1SRajkumar Manoharan int i; 31385ce543d1SRajkumar Manoharan 313957fbcce3SJohannes Berg for (band = 0; band < NUM_NL80211_BANDS; band++) { 31405ce543d1SRajkumar Manoharan sband = wiphy->bands[band]; 31415ce543d1SRajkumar Manoharan if (!sband) 31425ce543d1SRajkumar Manoharan continue; 31435ce543d1SRajkumar Manoharan for (i = 0; i < sband->n_channels; i++) { 31445ce543d1SRajkumar Manoharan chan = &sband->channels[i]; 31455ce543d1SRajkumar Manoharan chan->flags = chan->orig_flags; 31465ce543d1SRajkumar Manoharan chan->max_antenna_gain = chan->orig_mag; 31475ce543d1SRajkumar Manoharan chan->max_power = chan->orig_mpwr; 3148899852afSPaul Stewart chan->beacon_found = false; 31495ce543d1SRajkumar Manoharan } 31505ce543d1SRajkumar Manoharan } 31515ce543d1SRajkumar Manoharan } 31525ce543d1SRajkumar Manoharan 315309d989d1SLuis R. Rodriguez /* 315409d989d1SLuis R. Rodriguez * Restoring regulatory settings involves ingoring any 315509d989d1SLuis R. Rodriguez * possibly stale country IE information and user regulatory 315609d989d1SLuis R. Rodriguez * settings if so desired, this includes any beacon hints 315709d989d1SLuis R. Rodriguez * learned as we could have traveled outside to another country 315809d989d1SLuis R. Rodriguez * after disconnection. To restore regulatory settings we do 315909d989d1SLuis R. Rodriguez * exactly what we did at bootup: 316009d989d1SLuis R. Rodriguez * 316109d989d1SLuis R. Rodriguez * - send a core regulatory hint 316209d989d1SLuis R. Rodriguez * - send a user regulatory hint if applicable 316309d989d1SLuis R. Rodriguez * 316409d989d1SLuis R. Rodriguez * Device drivers that send a regulatory hint for a specific country 316509d989d1SLuis R. Rodriguez * keep their own regulatory domain on wiphy->regd so that does does 316609d989d1SLuis R. Rodriguez * not need to be remembered. 316709d989d1SLuis R. Rodriguez */ 3168e646a025SJohannes Berg static void restore_regulatory_settings(bool reset_user, bool cached) 316909d989d1SLuis R. Rodriguez { 317009d989d1SLuis R. Rodriguez char alpha2[2]; 3171cee0bec5SDmitry Shmidt char world_alpha2[2]; 317209d989d1SLuis R. Rodriguez struct reg_beacon *reg_beacon, *btmp; 317314609555SLuis R. Rodriguez LIST_HEAD(tmp_reg_req_list); 31745ce543d1SRajkumar Manoharan struct cfg80211_registered_device *rdev; 317509d989d1SLuis R. Rodriguez 31765fe231e8SJohannes Berg ASSERT_RTNL(); 31775fe231e8SJohannes Berg 317805050753SIlan peer /* 317905050753SIlan peer * Clear the indoor setting in case that it is not controlled by user 318005050753SIlan peer * space, as otherwise there is no guarantee that the device is still 318105050753SIlan peer * operating in an indoor environment. 318205050753SIlan peer */ 318305050753SIlan peer spin_lock(®_indoor_lock); 318405050753SIlan peer if (reg_is_indoor && !reg_is_indoor_portid) { 318552616f2bSIlan Peer reg_is_indoor = false; 318605050753SIlan peer reg_check_channels(); 318705050753SIlan peer } 318805050753SIlan peer spin_unlock(®_indoor_lock); 318952616f2bSIlan Peer 31902d319867SJohannes Berg reset_regdomains(true, &world_regdom); 319109d989d1SLuis R. Rodriguez restore_alpha2(alpha2, reset_user); 319209d989d1SLuis R. Rodriguez 319314609555SLuis R. Rodriguez /* 319414609555SLuis R. Rodriguez * If there's any pending requests we simply 319514609555SLuis R. Rodriguez * stash them to a temporary pending queue and 319614609555SLuis R. Rodriguez * add then after we've restored regulatory 319714609555SLuis R. Rodriguez * settings. 319814609555SLuis R. Rodriguez */ 319914609555SLuis R. Rodriguez spin_lock(®_requests_lock); 3200eeca9fceSIlan peer list_splice_tail_init(®_requests_list, &tmp_reg_req_list); 320114609555SLuis R. Rodriguez spin_unlock(®_requests_lock); 320214609555SLuis R. Rodriguez 320309d989d1SLuis R. Rodriguez /* Clear beacon hints */ 320409d989d1SLuis R. Rodriguez spin_lock_bh(®_pending_beacons_lock); 3205fea9bcedSJohannes Berg list_for_each_entry_safe(reg_beacon, btmp, ®_pending_beacons, list) { 320609d989d1SLuis R. Rodriguez list_del(®_beacon->list); 320709d989d1SLuis R. Rodriguez kfree(reg_beacon); 320809d989d1SLuis R. Rodriguez } 320909d989d1SLuis R. Rodriguez spin_unlock_bh(®_pending_beacons_lock); 321009d989d1SLuis R. Rodriguez 3211fea9bcedSJohannes Berg list_for_each_entry_safe(reg_beacon, btmp, ®_beacon_list, list) { 321209d989d1SLuis R. Rodriguez list_del(®_beacon->list); 321309d989d1SLuis R. Rodriguez kfree(reg_beacon); 321409d989d1SLuis R. Rodriguez } 321509d989d1SLuis R. Rodriguez 321609d989d1SLuis R. Rodriguez /* First restore to the basic regulatory settings */ 3217379b82f4SJohannes Berg world_alpha2[0] = cfg80211_world_regdom->alpha2[0]; 3218379b82f4SJohannes Berg world_alpha2[1] = cfg80211_world_regdom->alpha2[1]; 321909d989d1SLuis R. Rodriguez 32205ce543d1SRajkumar Manoharan list_for_each_entry(rdev, &cfg80211_rdev_list, list) { 3221b0d7aa59SJonathan Doron if (rdev->wiphy.regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) 3222b0d7aa59SJonathan Doron continue; 3223a2f73b6cSLuis R. Rodriguez if (rdev->wiphy.regulatory_flags & REGULATORY_CUSTOM_REG) 32245ce543d1SRajkumar Manoharan restore_custom_reg_settings(&rdev->wiphy); 32255ce543d1SRajkumar Manoharan } 32265ce543d1SRajkumar Manoharan 3227e646a025SJohannes Berg if (cached && (!is_an_alpha2(alpha2) || 3228e646a025SJohannes Berg !IS_ERR_OR_NULL(cfg80211_user_regdom))) { 3229e646a025SJohannes Berg reset_regdomains(false, cfg80211_world_regdom); 3230e646a025SJohannes Berg update_all_wiphy_regulatory(NL80211_REGDOM_SET_BY_CORE); 3231e646a025SJohannes Berg print_regdomain(get_cfg80211_regdom()); 3232e646a025SJohannes Berg nl80211_send_reg_change_event(&core_request_world); 3233e646a025SJohannes Berg reg_set_request_processed(); 3234e646a025SJohannes Berg 3235e646a025SJohannes Berg if (is_an_alpha2(alpha2) && 3236e646a025SJohannes Berg !regulatory_hint_user(alpha2, NL80211_USER_REG_HINT_USER)) { 3237e646a025SJohannes Berg struct regulatory_request *ureq; 3238e646a025SJohannes Berg 3239e646a025SJohannes Berg spin_lock(®_requests_lock); 3240e646a025SJohannes Berg ureq = list_last_entry(®_requests_list, 3241e646a025SJohannes Berg struct regulatory_request, 3242e646a025SJohannes Berg list); 3243e646a025SJohannes Berg list_del(&ureq->list); 3244e646a025SJohannes Berg spin_unlock(®_requests_lock); 3245e646a025SJohannes Berg 3246e646a025SJohannes Berg notify_self_managed_wiphys(ureq); 3247e646a025SJohannes Berg reg_update_last_request(ureq); 3248e646a025SJohannes Berg set_regdom(reg_copy_regd(cfg80211_user_regdom), 3249e646a025SJohannes Berg REGD_SOURCE_CACHED); 3250e646a025SJohannes Berg } 3251e646a025SJohannes Berg } else { 3252cee0bec5SDmitry Shmidt regulatory_hint_core(world_alpha2); 325309d989d1SLuis R. Rodriguez 325409d989d1SLuis R. Rodriguez /* 325509d989d1SLuis R. Rodriguez * This restores the ieee80211_regdom module parameter 325609d989d1SLuis R. Rodriguez * preference or the last user requested regulatory 325709d989d1SLuis R. Rodriguez * settings, user regulatory settings takes precedence. 325809d989d1SLuis R. Rodriguez */ 325909d989d1SLuis R. Rodriguez if (is_an_alpha2(alpha2)) 3260549cc1c5SMaciej S. Szmigiero regulatory_hint_user(alpha2, NL80211_USER_REG_HINT_USER); 3261e646a025SJohannes Berg } 326209d989d1SLuis R. Rodriguez 326314609555SLuis R. Rodriguez spin_lock(®_requests_lock); 326411cff96cSJohannes Berg list_splice_tail_init(&tmp_reg_req_list, ®_requests_list); 326514609555SLuis R. Rodriguez spin_unlock(®_requests_lock); 326614609555SLuis R. Rodriguez 3267c799ba6eSJohannes Berg pr_debug("Kicking the queue\n"); 326814609555SLuis R. Rodriguez 326914609555SLuis R. Rodriguez schedule_work(®_work); 327014609555SLuis R. Rodriguez } 327109d989d1SLuis R. Rodriguez 32727417844bSRajeev Kumar Sirasanagandla static bool is_wiphy_all_set_reg_flag(enum ieee80211_regulatory_flags flag) 32737417844bSRajeev Kumar Sirasanagandla { 32747417844bSRajeev Kumar Sirasanagandla struct cfg80211_registered_device *rdev; 32757417844bSRajeev Kumar Sirasanagandla struct wireless_dev *wdev; 32767417844bSRajeev Kumar Sirasanagandla 32777417844bSRajeev Kumar Sirasanagandla list_for_each_entry(rdev, &cfg80211_rdev_list, list) { 32787417844bSRajeev Kumar Sirasanagandla list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) { 32797417844bSRajeev Kumar Sirasanagandla wdev_lock(wdev); 32807417844bSRajeev Kumar Sirasanagandla if (!(wdev->wiphy->regulatory_flags & flag)) { 32817417844bSRajeev Kumar Sirasanagandla wdev_unlock(wdev); 32827417844bSRajeev Kumar Sirasanagandla return false; 32837417844bSRajeev Kumar Sirasanagandla } 32847417844bSRajeev Kumar Sirasanagandla wdev_unlock(wdev); 32857417844bSRajeev Kumar Sirasanagandla } 32867417844bSRajeev Kumar Sirasanagandla } 32877417844bSRajeev Kumar Sirasanagandla 32887417844bSRajeev Kumar Sirasanagandla return true; 32897417844bSRajeev Kumar Sirasanagandla } 32907417844bSRajeev Kumar Sirasanagandla 329109d989d1SLuis R. Rodriguez void regulatory_hint_disconnect(void) 329209d989d1SLuis R. Rodriguez { 32937417844bSRajeev Kumar Sirasanagandla /* Restore of regulatory settings is not required when wiphy(s) 32947417844bSRajeev Kumar Sirasanagandla * ignore IE from connected access point but clearance of beacon hints 32957417844bSRajeev Kumar Sirasanagandla * is required when wiphy(s) supports beacon hints. 32967417844bSRajeev Kumar Sirasanagandla */ 32977417844bSRajeev Kumar Sirasanagandla if (is_wiphy_all_set_reg_flag(REGULATORY_COUNTRY_IE_IGNORE)) { 32987417844bSRajeev Kumar Sirasanagandla struct reg_beacon *reg_beacon, *btmp; 32997417844bSRajeev Kumar Sirasanagandla 33007417844bSRajeev Kumar Sirasanagandla if (is_wiphy_all_set_reg_flag(REGULATORY_DISABLE_BEACON_HINTS)) 33017417844bSRajeev Kumar Sirasanagandla return; 33027417844bSRajeev Kumar Sirasanagandla 33037417844bSRajeev Kumar Sirasanagandla spin_lock_bh(®_pending_beacons_lock); 33047417844bSRajeev Kumar Sirasanagandla list_for_each_entry_safe(reg_beacon, btmp, 33057417844bSRajeev Kumar Sirasanagandla ®_pending_beacons, list) { 33067417844bSRajeev Kumar Sirasanagandla list_del(®_beacon->list); 33077417844bSRajeev Kumar Sirasanagandla kfree(reg_beacon); 33087417844bSRajeev Kumar Sirasanagandla } 33097417844bSRajeev Kumar Sirasanagandla spin_unlock_bh(®_pending_beacons_lock); 33107417844bSRajeev Kumar Sirasanagandla 33117417844bSRajeev Kumar Sirasanagandla list_for_each_entry_safe(reg_beacon, btmp, 33127417844bSRajeev Kumar Sirasanagandla ®_beacon_list, list) { 33137417844bSRajeev Kumar Sirasanagandla list_del(®_beacon->list); 33147417844bSRajeev Kumar Sirasanagandla kfree(reg_beacon); 33157417844bSRajeev Kumar Sirasanagandla } 33167417844bSRajeev Kumar Sirasanagandla 33177417844bSRajeev Kumar Sirasanagandla return; 33187417844bSRajeev Kumar Sirasanagandla } 33197417844bSRajeev Kumar Sirasanagandla 3320c799ba6eSJohannes Berg pr_debug("All devices are disconnected, going to restore regulatory settings\n"); 3321e646a025SJohannes Berg restore_regulatory_settings(false, true); 332209d989d1SLuis R. Rodriguez } 332309d989d1SLuis R. Rodriguez 33249cf0a0b4SAlexei Avshalom Lazar static bool freq_is_chan_12_13_14(u32 freq) 3325e38f8a7aSLuis R. Rodriguez { 332657fbcce3SJohannes Berg if (freq == ieee80211_channel_to_frequency(12, NL80211_BAND_2GHZ) || 332757fbcce3SJohannes Berg freq == ieee80211_channel_to_frequency(13, NL80211_BAND_2GHZ) || 332857fbcce3SJohannes Berg freq == ieee80211_channel_to_frequency(14, NL80211_BAND_2GHZ)) 3329e38f8a7aSLuis R. Rodriguez return true; 3330e38f8a7aSLuis R. Rodriguez return false; 3331e38f8a7aSLuis R. Rodriguez } 3332e38f8a7aSLuis R. Rodriguez 33333ebfa6e7SLuis R. Rodriguez static bool pending_reg_beacon(struct ieee80211_channel *beacon_chan) 33343ebfa6e7SLuis R. Rodriguez { 33353ebfa6e7SLuis R. Rodriguez struct reg_beacon *pending_beacon; 33363ebfa6e7SLuis R. Rodriguez 33373ebfa6e7SLuis R. Rodriguez list_for_each_entry(pending_beacon, ®_pending_beacons, list) 33383ebfa6e7SLuis R. Rodriguez if (beacon_chan->center_freq == 33393ebfa6e7SLuis R. Rodriguez pending_beacon->chan.center_freq) 33403ebfa6e7SLuis R. Rodriguez return true; 33413ebfa6e7SLuis R. Rodriguez return false; 33423ebfa6e7SLuis R. Rodriguez } 33433ebfa6e7SLuis R. Rodriguez 3344e38f8a7aSLuis R. Rodriguez int regulatory_hint_found_beacon(struct wiphy *wiphy, 3345e38f8a7aSLuis R. Rodriguez struct ieee80211_channel *beacon_chan, 3346e38f8a7aSLuis R. Rodriguez gfp_t gfp) 3347e38f8a7aSLuis R. Rodriguez { 3348e38f8a7aSLuis R. Rodriguez struct reg_beacon *reg_beacon; 33493ebfa6e7SLuis R. Rodriguez bool processing; 3350e38f8a7aSLuis R. Rodriguez 33511a919318SJohannes Berg if (beacon_chan->beacon_found || 33521a919318SJohannes Berg beacon_chan->flags & IEEE80211_CHAN_RADAR || 335357fbcce3SJohannes Berg (beacon_chan->band == NL80211_BAND_2GHZ && 33541a919318SJohannes Berg !freq_is_chan_12_13_14(beacon_chan->center_freq))) 3355e38f8a7aSLuis R. Rodriguez return 0; 3356e38f8a7aSLuis R. Rodriguez 33573ebfa6e7SLuis R. Rodriguez spin_lock_bh(®_pending_beacons_lock); 33583ebfa6e7SLuis R. Rodriguez processing = pending_reg_beacon(beacon_chan); 33593ebfa6e7SLuis R. Rodriguez spin_unlock_bh(®_pending_beacons_lock); 33603ebfa6e7SLuis R. Rodriguez 33613ebfa6e7SLuis R. Rodriguez if (processing) 3362e38f8a7aSLuis R. Rodriguez return 0; 3363e38f8a7aSLuis R. Rodriguez 3364e38f8a7aSLuis R. Rodriguez reg_beacon = kzalloc(sizeof(struct reg_beacon), gfp); 3365e38f8a7aSLuis R. Rodriguez if (!reg_beacon) 3366e38f8a7aSLuis R. Rodriguez return -ENOMEM; 3367e38f8a7aSLuis R. Rodriguez 3368c799ba6eSJohannes Berg pr_debug("Found new beacon on frequency: %d MHz (Ch %d) on %s\n", 3369e38f8a7aSLuis R. Rodriguez beacon_chan->center_freq, 3370e38f8a7aSLuis R. Rodriguez ieee80211_frequency_to_channel(beacon_chan->center_freq), 3371e38f8a7aSLuis R. Rodriguez wiphy_name(wiphy)); 33724113f751SLuis R. Rodriguez 3373e38f8a7aSLuis R. Rodriguez memcpy(®_beacon->chan, beacon_chan, 3374e38f8a7aSLuis R. Rodriguez sizeof(struct ieee80211_channel)); 3375e38f8a7aSLuis R. Rodriguez 3376e38f8a7aSLuis R. Rodriguez /* 3377e38f8a7aSLuis R. Rodriguez * Since we can be called from BH or and non-BH context 3378e38f8a7aSLuis R. Rodriguez * we must use spin_lock_bh() 3379e38f8a7aSLuis R. Rodriguez */ 3380e38f8a7aSLuis R. Rodriguez spin_lock_bh(®_pending_beacons_lock); 3381e38f8a7aSLuis R. Rodriguez list_add_tail(®_beacon->list, ®_pending_beacons); 3382e38f8a7aSLuis R. Rodriguez spin_unlock_bh(®_pending_beacons_lock); 3383e38f8a7aSLuis R. Rodriguez 3384e38f8a7aSLuis R. Rodriguez schedule_work(®_work); 3385e38f8a7aSLuis R. Rodriguez 3386e38f8a7aSLuis R. Rodriguez return 0; 3387e38f8a7aSLuis R. Rodriguez } 3388e38f8a7aSLuis R. Rodriguez 3389a3d2eaf0SJohannes Berg static void print_rd_rules(const struct ieee80211_regdomain *rd) 3390b2e1b302SLuis R. Rodriguez { 3391b2e1b302SLuis R. Rodriguez unsigned int i; 3392a3d2eaf0SJohannes Berg const struct ieee80211_reg_rule *reg_rule = NULL; 3393a3d2eaf0SJohannes Berg const struct ieee80211_freq_range *freq_range = NULL; 3394a3d2eaf0SJohannes Berg const struct ieee80211_power_rule *power_rule = NULL; 3395089027e5SJanusz Dziedzic char bw[32], cac_time[32]; 3396b2e1b302SLuis R. Rodriguez 339794c4fd64SDave Young pr_debug(" (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp), (dfs_cac_time)\n"); 3398b2e1b302SLuis R. Rodriguez 3399b2e1b302SLuis R. Rodriguez for (i = 0; i < rd->n_reg_rules; i++) { 3400b2e1b302SLuis R. Rodriguez reg_rule = &rd->reg_rules[i]; 3401b2e1b302SLuis R. Rodriguez freq_range = ®_rule->freq_range; 3402b2e1b302SLuis R. Rodriguez power_rule = ®_rule->power_rule; 3403b2e1b302SLuis R. Rodriguez 3404b0dfd2eaSJanusz Dziedzic if (reg_rule->flags & NL80211_RRF_AUTO_BW) 3405b0dfd2eaSJanusz Dziedzic snprintf(bw, sizeof(bw), "%d KHz, %d KHz AUTO", 3406b0dfd2eaSJanusz Dziedzic freq_range->max_bandwidth_khz, 340797524820SJanusz Dziedzic reg_get_max_bandwidth(rd, reg_rule)); 340897524820SJanusz Dziedzic else 3409b0dfd2eaSJanusz Dziedzic snprintf(bw, sizeof(bw), "%d KHz", 341097524820SJanusz Dziedzic freq_range->max_bandwidth_khz); 341197524820SJanusz Dziedzic 3412089027e5SJanusz Dziedzic if (reg_rule->flags & NL80211_RRF_DFS) 3413089027e5SJanusz Dziedzic scnprintf(cac_time, sizeof(cac_time), "%u s", 3414089027e5SJanusz Dziedzic reg_rule->dfs_cac_ms/1000); 3415089027e5SJanusz Dziedzic else 3416089027e5SJanusz Dziedzic scnprintf(cac_time, sizeof(cac_time), "N/A"); 3417089027e5SJanusz Dziedzic 3418089027e5SJanusz Dziedzic 3419fb1fc7adSLuis R. Rodriguez /* 3420fb1fc7adSLuis R. Rodriguez * There may not be documentation for max antenna gain 3421fb1fc7adSLuis R. Rodriguez * in certain regions 3422fb1fc7adSLuis R. Rodriguez */ 3423b2e1b302SLuis R. Rodriguez if (power_rule->max_antenna_gain) 342494c4fd64SDave Young pr_debug(" (%d KHz - %d KHz @ %s), (%d mBi, %d mBm), (%s)\n", 3425b2e1b302SLuis R. Rodriguez freq_range->start_freq_khz, 3426b2e1b302SLuis R. Rodriguez freq_range->end_freq_khz, 342797524820SJanusz Dziedzic bw, 3428b2e1b302SLuis R. Rodriguez power_rule->max_antenna_gain, 3429089027e5SJanusz Dziedzic power_rule->max_eirp, 3430089027e5SJanusz Dziedzic cac_time); 3431b2e1b302SLuis R. Rodriguez else 343294c4fd64SDave Young pr_debug(" (%d KHz - %d KHz @ %s), (N/A, %d mBm), (%s)\n", 3433b2e1b302SLuis R. Rodriguez freq_range->start_freq_khz, 3434b2e1b302SLuis R. Rodriguez freq_range->end_freq_khz, 343597524820SJanusz Dziedzic bw, 3436089027e5SJanusz Dziedzic power_rule->max_eirp, 3437089027e5SJanusz Dziedzic cac_time); 3438b2e1b302SLuis R. Rodriguez } 3439b2e1b302SLuis R. Rodriguez } 3440b2e1b302SLuis R. Rodriguez 34414c7d3982SLuis R. Rodriguez bool reg_supported_dfs_region(enum nl80211_dfs_regions dfs_region) 34428b60b078SLuis R. Rodriguez { 34438b60b078SLuis R. Rodriguez switch (dfs_region) { 34448b60b078SLuis R. Rodriguez case NL80211_DFS_UNSET: 34458b60b078SLuis R. Rodriguez case NL80211_DFS_FCC: 34468b60b078SLuis R. Rodriguez case NL80211_DFS_ETSI: 34478b60b078SLuis R. Rodriguez case NL80211_DFS_JP: 34488b60b078SLuis R. Rodriguez return true; 34498b60b078SLuis R. Rodriguez default: 34504a22b00bSColin Ian King pr_debug("Ignoring unknown DFS master region: %d\n", dfs_region); 34518b60b078SLuis R. Rodriguez return false; 34528b60b078SLuis R. Rodriguez } 34538b60b078SLuis R. Rodriguez } 34548b60b078SLuis R. Rodriguez 3455a3d2eaf0SJohannes Berg static void print_regdomain(const struct ieee80211_regdomain *rd) 3456b2e1b302SLuis R. Rodriguez { 3457c492db37SJohannes Berg struct regulatory_request *lr = get_last_request(); 3458b2e1b302SLuis R. Rodriguez 34593f2355cbSLuis R. Rodriguez if (is_intersected_alpha2(rd->alpha2)) { 3460c492db37SJohannes Berg if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) { 346179c97e97SJohannes Berg struct cfg80211_registered_device *rdev; 3462c492db37SJohannes Berg rdev = cfg80211_rdev_by_wiphy_idx(lr->wiphy_idx); 346379c97e97SJohannes Berg if (rdev) { 346494c4fd64SDave Young pr_debug("Current regulatory domain updated by AP to: %c%c\n", 346579c97e97SJohannes Berg rdev->country_ie_alpha2[0], 346679c97e97SJohannes Berg rdev->country_ie_alpha2[1]); 34673f2355cbSLuis R. Rodriguez } else 346894c4fd64SDave Young pr_debug("Current regulatory domain intersected:\n"); 34693f2355cbSLuis R. Rodriguez } else 347094c4fd64SDave Young pr_debug("Current regulatory domain intersected:\n"); 34711a919318SJohannes Berg } else if (is_world_regdom(rd->alpha2)) { 347294c4fd64SDave Young pr_debug("World regulatory domain updated:\n"); 34731a919318SJohannes Berg } else { 3474b2e1b302SLuis R. Rodriguez if (is_unknown_alpha2(rd->alpha2)) 347594c4fd64SDave Young pr_debug("Regulatory domain changed to driver built-in settings (unknown country)\n"); 347657b5ce07SLuis R. Rodriguez else { 3477c492db37SJohannes Berg if (reg_request_cell_base(lr)) 347894c4fd64SDave Young pr_debug("Regulatory domain changed to country: %c%c by Cell Station\n", 3479b2e1b302SLuis R. Rodriguez rd->alpha2[0], rd->alpha2[1]); 348057b5ce07SLuis R. Rodriguez else 348194c4fd64SDave Young pr_debug("Regulatory domain changed to country: %c%c\n", 348257b5ce07SLuis R. Rodriguez rd->alpha2[0], rd->alpha2[1]); 348357b5ce07SLuis R. Rodriguez } 3484b2e1b302SLuis R. Rodriguez } 34851a919318SJohannes Berg 348694c4fd64SDave Young pr_debug(" DFS Master region: %s", reg_dfs_region_str(rd->dfs_region)); 3487b2e1b302SLuis R. Rodriguez print_rd_rules(rd); 3488b2e1b302SLuis R. Rodriguez } 3489b2e1b302SLuis R. Rodriguez 34902df78167SJohannes Berg static void print_regdomain_info(const struct ieee80211_regdomain *rd) 3491b2e1b302SLuis R. Rodriguez { 349294c4fd64SDave Young pr_debug("Regulatory domain: %c%c\n", rd->alpha2[0], rd->alpha2[1]); 3493b2e1b302SLuis R. Rodriguez print_rd_rules(rd); 3494b2e1b302SLuis R. Rodriguez } 3495b2e1b302SLuis R. Rodriguez 34963b9e5acaSLuis R. Rodriguez static int reg_set_rd_core(const struct ieee80211_regdomain *rd) 34973b9e5acaSLuis R. Rodriguez { 34983b9e5acaSLuis R. Rodriguez if (!is_world_regdom(rd->alpha2)) 34993b9e5acaSLuis R. Rodriguez return -EINVAL; 35003b9e5acaSLuis R. Rodriguez update_world_regdomain(rd); 35013b9e5acaSLuis R. Rodriguez return 0; 35023b9e5acaSLuis R. Rodriguez } 35033b9e5acaSLuis R. Rodriguez 350484721d44SLuis R. Rodriguez static int reg_set_rd_user(const struct ieee80211_regdomain *rd, 350584721d44SLuis R. Rodriguez struct regulatory_request *user_request) 350684721d44SLuis R. Rodriguez { 350784721d44SLuis R. Rodriguez const struct ieee80211_regdomain *intersected_rd = NULL; 350884721d44SLuis R. Rodriguez 350984721d44SLuis R. Rodriguez if (!regdom_changes(rd->alpha2)) 351084721d44SLuis R. Rodriguez return -EALREADY; 351184721d44SLuis R. Rodriguez 351284721d44SLuis R. Rodriguez if (!is_valid_rd(rd)) { 351394c4fd64SDave Young pr_err("Invalid regulatory domain detected: %c%c\n", 351494c4fd64SDave Young rd->alpha2[0], rd->alpha2[1]); 351584721d44SLuis R. Rodriguez print_regdomain_info(rd); 351684721d44SLuis R. Rodriguez return -EINVAL; 351784721d44SLuis R. Rodriguez } 351884721d44SLuis R. Rodriguez 351984721d44SLuis R. Rodriguez if (!user_request->intersect) { 352084721d44SLuis R. Rodriguez reset_regdomains(false, rd); 352184721d44SLuis R. Rodriguez return 0; 352284721d44SLuis R. Rodriguez } 352384721d44SLuis R. Rodriguez 352484721d44SLuis R. Rodriguez intersected_rd = regdom_intersect(rd, get_cfg80211_regdom()); 352584721d44SLuis R. Rodriguez if (!intersected_rd) 352684721d44SLuis R. Rodriguez return -EINVAL; 352784721d44SLuis R. Rodriguez 352884721d44SLuis R. Rodriguez kfree(rd); 352984721d44SLuis R. Rodriguez rd = NULL; 353084721d44SLuis R. Rodriguez reset_regdomains(false, intersected_rd); 353184721d44SLuis R. Rodriguez 353284721d44SLuis R. Rodriguez return 0; 353384721d44SLuis R. Rodriguez } 353484721d44SLuis R. Rodriguez 3535f5fe3247SLuis R. Rodriguez static int reg_set_rd_driver(const struct ieee80211_regdomain *rd, 3536f5fe3247SLuis R. Rodriguez struct regulatory_request *driver_request) 3537b2e1b302SLuis R. Rodriguez { 3538e9763c3cSJohannes Berg const struct ieee80211_regdomain *regd; 35399c96477dSLuis R. Rodriguez const struct ieee80211_regdomain *intersected_rd = NULL; 3540f5fe3247SLuis R. Rodriguez const struct ieee80211_regdomain *tmp; 3541806a9e39SLuis R. Rodriguez struct wiphy *request_wiphy; 35426913b49aSJohannes Berg 3543f5fe3247SLuis R. Rodriguez if (is_world_regdom(rd->alpha2)) 3544b2e1b302SLuis R. Rodriguez return -EINVAL; 3545b2e1b302SLuis R. Rodriguez 3546baeb66feSJohn W. Linville if (!regdom_changes(rd->alpha2)) 354795908535SKalle Valo return -EALREADY; 3548b2e1b302SLuis R. Rodriguez 3549b2e1b302SLuis R. Rodriguez if (!is_valid_rd(rd)) { 355094c4fd64SDave Young pr_err("Invalid regulatory domain detected: %c%c\n", 355194c4fd64SDave Young rd->alpha2[0], rd->alpha2[1]); 3552b2e1b302SLuis R. Rodriguez print_regdomain_info(rd); 3553b2e1b302SLuis R. Rodriguez return -EINVAL; 3554b2e1b302SLuis R. Rodriguez } 3555b2e1b302SLuis R. Rodriguez 3556f5fe3247SLuis R. Rodriguez request_wiphy = wiphy_idx_to_wiphy(driver_request->wiphy_idx); 3557922ec58cSJohannes Berg if (!request_wiphy) 3558de3584bdSJohannes Berg return -ENODEV; 3559806a9e39SLuis R. Rodriguez 3560f5fe3247SLuis R. Rodriguez if (!driver_request->intersect) { 3561558f6d32SLuis R. Rodriguez if (request_wiphy->regd) 3562558f6d32SLuis R. Rodriguez return -EALREADY; 35633e0c3ff3SLuis R. Rodriguez 3564e9763c3cSJohannes Berg regd = reg_copy_regd(rd); 3565e9763c3cSJohannes Berg if (IS_ERR(regd)) 3566e9763c3cSJohannes Berg return PTR_ERR(regd); 35673e0c3ff3SLuis R. Rodriguez 3568458f4f9eSJohannes Berg rcu_assign_pointer(request_wiphy->regd, regd); 3569379b82f4SJohannes Berg reset_regdomains(false, rd); 3570b8295acdSLuis R. Rodriguez return 0; 3571b8295acdSLuis R. Rodriguez } 3572b8295acdSLuis R. Rodriguez 3573458f4f9eSJohannes Berg intersected_rd = regdom_intersect(rd, get_cfg80211_regdom()); 35749c96477dSLuis R. Rodriguez if (!intersected_rd) 35759c96477dSLuis R. Rodriguez return -EINVAL; 3576b8295acdSLuis R. Rodriguez 3577fb1fc7adSLuis R. Rodriguez /* 3578fb1fc7adSLuis R. Rodriguez * We can trash what CRDA provided now. 35793e0c3ff3SLuis R. Rodriguez * However if a driver requested this specific regulatory 3580fb1fc7adSLuis R. Rodriguez * domain we keep it for its private use 3581fb1fc7adSLuis R. Rodriguez */ 3582b7566fc3SLarry Finger tmp = get_wiphy_regdom(request_wiphy); 3583458f4f9eSJohannes Berg rcu_assign_pointer(request_wiphy->regd, rd); 3584b7566fc3SLarry Finger rcu_free_regdom(tmp); 35853e0c3ff3SLuis R. Rodriguez 3586b8295acdSLuis R. Rodriguez rd = NULL; 3587b8295acdSLuis R. Rodriguez 3588379b82f4SJohannes Berg reset_regdomains(false, intersected_rd); 3589b8295acdSLuis R. Rodriguez 3590b8295acdSLuis R. Rodriguez return 0; 35919c96477dSLuis R. Rodriguez } 35929c96477dSLuis R. Rodriguez 359301992406SLuis R. Rodriguez static int reg_set_rd_country_ie(const struct ieee80211_regdomain *rd, 359401992406SLuis R. Rodriguez struct regulatory_request *country_ie_request) 3595f5fe3247SLuis R. Rodriguez { 3596f5fe3247SLuis R. Rodriguez struct wiphy *request_wiphy; 3597f5fe3247SLuis R. Rodriguez 3598f5fe3247SLuis R. Rodriguez if (!is_alpha2_set(rd->alpha2) && !is_an_alpha2(rd->alpha2) && 3599f5fe3247SLuis R. Rodriguez !is_unknown_alpha2(rd->alpha2)) 3600f5fe3247SLuis R. Rodriguez return -EINVAL; 3601f5fe3247SLuis R. Rodriguez 3602f5fe3247SLuis R. Rodriguez /* 3603f5fe3247SLuis R. Rodriguez * Lets only bother proceeding on the same alpha2 if the current 3604f5fe3247SLuis R. Rodriguez * rd is non static (it means CRDA was present and was used last) 3605f5fe3247SLuis R. Rodriguez * and the pending request came in from a country IE 3606f5fe3247SLuis R. Rodriguez */ 3607f5fe3247SLuis R. Rodriguez 3608f5fe3247SLuis R. Rodriguez if (!is_valid_rd(rd)) { 360994c4fd64SDave Young pr_err("Invalid regulatory domain detected: %c%c\n", 361094c4fd64SDave Young rd->alpha2[0], rd->alpha2[1]); 3611f5fe3247SLuis R. Rodriguez print_regdomain_info(rd); 36123f2355cbSLuis R. Rodriguez return -EINVAL; 3613b2e1b302SLuis R. Rodriguez } 3614b2e1b302SLuis R. Rodriguez 361501992406SLuis R. Rodriguez request_wiphy = wiphy_idx_to_wiphy(country_ie_request->wiphy_idx); 3616922ec58cSJohannes Berg if (!request_wiphy) 3617f5fe3247SLuis R. Rodriguez return -ENODEV; 3618f5fe3247SLuis R. Rodriguez 361901992406SLuis R. Rodriguez if (country_ie_request->intersect) 3620f5fe3247SLuis R. Rodriguez return -EINVAL; 3621f5fe3247SLuis R. Rodriguez 3622f5fe3247SLuis R. Rodriguez reset_regdomains(false, rd); 3623f5fe3247SLuis R. Rodriguez return 0; 3624f5fe3247SLuis R. Rodriguez } 3625b2e1b302SLuis R. Rodriguez 3626fb1fc7adSLuis R. Rodriguez /* 3627fb1fc7adSLuis R. Rodriguez * Use this call to set the current regulatory domain. Conflicts with 3628b2e1b302SLuis R. Rodriguez * multiple drivers can be ironed out later. Caller must've already 3629458f4f9eSJohannes Berg * kmalloc'd the rd structure. 3630fb1fc7adSLuis R. Rodriguez */ 3631c37722bdSIlan peer int set_regdom(const struct ieee80211_regdomain *rd, 3632c37722bdSIlan peer enum ieee80211_regd_source regd_src) 3633b2e1b302SLuis R. Rodriguez { 3634c492db37SJohannes Berg struct regulatory_request *lr; 3635092008abSJanusz Dziedzic bool user_reset = false; 3636b2e1b302SLuis R. Rodriguez int r; 3637b2e1b302SLuis R. Rodriguez 3638e646a025SJohannes Berg if (IS_ERR_OR_NULL(rd)) 3639e646a025SJohannes Berg return -ENODATA; 3640e646a025SJohannes Berg 36413b9e5acaSLuis R. Rodriguez if (!reg_is_valid_request(rd->alpha2)) { 36423b9e5acaSLuis R. Rodriguez kfree(rd); 36433b9e5acaSLuis R. Rodriguez return -EINVAL; 36443b9e5acaSLuis R. Rodriguez } 36453b9e5acaSLuis R. Rodriguez 3646c37722bdSIlan peer if (regd_src == REGD_SOURCE_CRDA) 3647b6863036SJohannes Berg reset_crda_timeouts(); 3648c37722bdSIlan peer 3649c492db37SJohannes Berg lr = get_last_request(); 3650abc7381bSLuis R. Rodriguez 3651b2e1b302SLuis R. Rodriguez /* Note that this doesn't update the wiphys, this is done below */ 36523b9e5acaSLuis R. Rodriguez switch (lr->initiator) { 36533b9e5acaSLuis R. Rodriguez case NL80211_REGDOM_SET_BY_CORE: 36543b9e5acaSLuis R. Rodriguez r = reg_set_rd_core(rd); 36553b9e5acaSLuis R. Rodriguez break; 36563b9e5acaSLuis R. Rodriguez case NL80211_REGDOM_SET_BY_USER: 3657e646a025SJohannes Berg cfg80211_save_user_regdom(rd); 365884721d44SLuis R. Rodriguez r = reg_set_rd_user(rd, lr); 3659092008abSJanusz Dziedzic user_reset = true; 366084721d44SLuis R. Rodriguez break; 36613b9e5acaSLuis R. Rodriguez case NL80211_REGDOM_SET_BY_DRIVER: 3662f5fe3247SLuis R. Rodriguez r = reg_set_rd_driver(rd, lr); 3663f5fe3247SLuis R. Rodriguez break; 36643b9e5acaSLuis R. Rodriguez case NL80211_REGDOM_SET_BY_COUNTRY_IE: 366501992406SLuis R. Rodriguez r = reg_set_rd_country_ie(rd, lr); 36663b9e5acaSLuis R. Rodriguez break; 36673b9e5acaSLuis R. Rodriguez default: 36683b9e5acaSLuis R. Rodriguez WARN(1, "invalid initiator %d\n", lr->initiator); 366909d11800SOla Olsson kfree(rd); 36703b9e5acaSLuis R. Rodriguez return -EINVAL; 36713b9e5acaSLuis R. Rodriguez } 36723b9e5acaSLuis R. Rodriguez 3673d2372b31SJohannes Berg if (r) { 3674092008abSJanusz Dziedzic switch (r) { 3675092008abSJanusz Dziedzic case -EALREADY: 367695908535SKalle Valo reg_set_request_processed(); 3677092008abSJanusz Dziedzic break; 3678092008abSJanusz Dziedzic default: 3679092008abSJanusz Dziedzic /* Back to world regulatory in case of errors */ 3680e646a025SJohannes Berg restore_regulatory_settings(user_reset, false); 3681092008abSJanusz Dziedzic } 368295908535SKalle Valo 3683d2372b31SJohannes Berg kfree(rd); 368438fd2143SJohannes Berg return r; 3685d2372b31SJohannes Berg } 3686b2e1b302SLuis R. Rodriguez 3687b2e1b302SLuis R. Rodriguez /* This would make this whole thing pointless */ 368838fd2143SJohannes Berg if (WARN_ON(!lr->intersect && rd != get_cfg80211_regdom())) 368938fd2143SJohannes Berg return -EINVAL; 3690b2e1b302SLuis R. Rodriguez 3691b2e1b302SLuis R. Rodriguez /* update all wiphys now with the new established regulatory domain */ 3692c492db37SJohannes Berg update_all_wiphy_regulatory(lr->initiator); 3693b2e1b302SLuis R. Rodriguez 3694458f4f9eSJohannes Berg print_regdomain(get_cfg80211_regdom()); 3695b2e1b302SLuis R. Rodriguez 3696c492db37SJohannes Berg nl80211_send_reg_change_event(lr); 369773d54c9eSLuis R. Rodriguez 3698b2e253cfSLuis R. Rodriguez reg_set_request_processed(); 3699b2e253cfSLuis R. Rodriguez 370038fd2143SJohannes Berg return 0; 3701b2e1b302SLuis R. Rodriguez } 3702b2e1b302SLuis R. Rodriguez 37032c3e861cSArik Nemtsov static int __regulatory_set_wiphy_regd(struct wiphy *wiphy, 3704b0d7aa59SJonathan Doron struct ieee80211_regdomain *rd) 3705b0d7aa59SJonathan Doron { 3706b0d7aa59SJonathan Doron const struct ieee80211_regdomain *regd; 3707b0d7aa59SJonathan Doron const struct ieee80211_regdomain *prev_regd; 3708b0d7aa59SJonathan Doron struct cfg80211_registered_device *rdev; 3709b0d7aa59SJonathan Doron 3710b0d7aa59SJonathan Doron if (WARN_ON(!wiphy || !rd)) 3711b0d7aa59SJonathan Doron return -EINVAL; 3712b0d7aa59SJonathan Doron 3713b0d7aa59SJonathan Doron if (WARN(!(wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED), 3714b0d7aa59SJonathan Doron "wiphy should have REGULATORY_WIPHY_SELF_MANAGED\n")) 3715b0d7aa59SJonathan Doron return -EPERM; 3716b0d7aa59SJonathan Doron 3717b0d7aa59SJonathan Doron if (WARN(!is_valid_rd(rd), "Invalid regulatory domain detected\n")) { 3718b0d7aa59SJonathan Doron print_regdomain_info(rd); 3719b0d7aa59SJonathan Doron return -EINVAL; 3720b0d7aa59SJonathan Doron } 3721b0d7aa59SJonathan Doron 3722b0d7aa59SJonathan Doron regd = reg_copy_regd(rd); 3723b0d7aa59SJonathan Doron if (IS_ERR(regd)) 3724b0d7aa59SJonathan Doron return PTR_ERR(regd); 3725b0d7aa59SJonathan Doron 3726b0d7aa59SJonathan Doron rdev = wiphy_to_rdev(wiphy); 3727b0d7aa59SJonathan Doron 3728b0d7aa59SJonathan Doron spin_lock(®_requests_lock); 3729b0d7aa59SJonathan Doron prev_regd = rdev->requested_regd; 3730b0d7aa59SJonathan Doron rdev->requested_regd = regd; 3731b0d7aa59SJonathan Doron spin_unlock(®_requests_lock); 3732b0d7aa59SJonathan Doron 3733b0d7aa59SJonathan Doron kfree(prev_regd); 37342c3e861cSArik Nemtsov return 0; 37352c3e861cSArik Nemtsov } 37362c3e861cSArik Nemtsov 37372c3e861cSArik Nemtsov int regulatory_set_wiphy_regd(struct wiphy *wiphy, 37382c3e861cSArik Nemtsov struct ieee80211_regdomain *rd) 37392c3e861cSArik Nemtsov { 37402c3e861cSArik Nemtsov int ret = __regulatory_set_wiphy_regd(wiphy, rd); 37412c3e861cSArik Nemtsov 37422c3e861cSArik Nemtsov if (ret) 37432c3e861cSArik Nemtsov return ret; 3744b0d7aa59SJonathan Doron 3745b0d7aa59SJonathan Doron schedule_work(®_work); 3746b0d7aa59SJonathan Doron return 0; 3747b0d7aa59SJonathan Doron } 3748b0d7aa59SJonathan Doron EXPORT_SYMBOL(regulatory_set_wiphy_regd); 3749b0d7aa59SJonathan Doron 37502c3e861cSArik Nemtsov int regulatory_set_wiphy_regd_sync_rtnl(struct wiphy *wiphy, 37512c3e861cSArik Nemtsov struct ieee80211_regdomain *rd) 37522c3e861cSArik Nemtsov { 37532c3e861cSArik Nemtsov int ret; 37542c3e861cSArik Nemtsov 37552c3e861cSArik Nemtsov ASSERT_RTNL(); 37562c3e861cSArik Nemtsov 37572c3e861cSArik Nemtsov ret = __regulatory_set_wiphy_regd(wiphy, rd); 37582c3e861cSArik Nemtsov if (ret) 37592c3e861cSArik Nemtsov return ret; 37602c3e861cSArik Nemtsov 37612c3e861cSArik Nemtsov /* process the request immediately */ 37622c3e861cSArik Nemtsov reg_process_self_managed_hints(); 37632c3e861cSArik Nemtsov return 0; 37642c3e861cSArik Nemtsov } 37652c3e861cSArik Nemtsov EXPORT_SYMBOL(regulatory_set_wiphy_regd_sync_rtnl); 37662c3e861cSArik Nemtsov 376757b5ce07SLuis R. Rodriguez void wiphy_regulatory_register(struct wiphy *wiphy) 376857b5ce07SLuis R. Rodriguez { 3769aced43ceSAmar Singhal struct regulatory_request *lr = get_last_request(); 377023df0b73SArik Nemtsov 3771aced43ceSAmar Singhal /* self-managed devices ignore beacon hints and country IE */ 3772aced43ceSAmar Singhal if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) { 3773b0d7aa59SJonathan Doron wiphy->regulatory_flags |= REGULATORY_DISABLE_BEACON_HINTS | 3774b0d7aa59SJonathan Doron REGULATORY_COUNTRY_IE_IGNORE; 3775b0d7aa59SJonathan Doron 3776aced43ceSAmar Singhal /* 3777aced43ceSAmar Singhal * The last request may have been received before this 3778aced43ceSAmar Singhal * registration call. Call the driver notifier if 37798772eed9SSriram R * initiator is USER. 3780aced43ceSAmar Singhal */ 37818772eed9SSriram R if (lr->initiator == NL80211_REGDOM_SET_BY_USER) 3782aced43ceSAmar Singhal reg_call_notifier(wiphy, lr); 3783aced43ceSAmar Singhal } 3784aced43ceSAmar Singhal 378557b5ce07SLuis R. Rodriguez if (!reg_dev_ignore_cell_hint(wiphy)) 378657b5ce07SLuis R. Rodriguez reg_num_devs_support_basehint++; 378757b5ce07SLuis R. Rodriguez 378823df0b73SArik Nemtsov wiphy_update_regulatory(wiphy, lr->initiator); 378989766727SVasanthakumar Thiagarajan wiphy_all_share_dfs_chan_state(wiphy); 379057b5ce07SLuis R. Rodriguez } 379157b5ce07SLuis R. Rodriguez 3792bfead080SLuis R. Rodriguez void wiphy_regulatory_deregister(struct wiphy *wiphy) 37933f2355cbSLuis R. Rodriguez { 37940ad8acafSLuis R. Rodriguez struct wiphy *request_wiphy = NULL; 3795c492db37SJohannes Berg struct regulatory_request *lr; 3796761cf7ecSLuis R. Rodriguez 3797c492db37SJohannes Berg lr = get_last_request(); 3798abc7381bSLuis R. Rodriguez 379957b5ce07SLuis R. Rodriguez if (!reg_dev_ignore_cell_hint(wiphy)) 380057b5ce07SLuis R. Rodriguez reg_num_devs_support_basehint--; 380157b5ce07SLuis R. Rodriguez 3802458f4f9eSJohannes Berg rcu_free_regdom(get_wiphy_regdom(wiphy)); 380334dd886cSMonam Agarwal RCU_INIT_POINTER(wiphy->regd, NULL); 38040ef9ccddSChris Wright 3805c492db37SJohannes Berg if (lr) 3806c492db37SJohannes Berg request_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx); 3807806a9e39SLuis R. Rodriguez 38080ef9ccddSChris Wright if (!request_wiphy || request_wiphy != wiphy) 380938fd2143SJohannes Berg return; 38100ef9ccddSChris Wright 3811c492db37SJohannes Berg lr->wiphy_idx = WIPHY_IDX_INVALID; 3812c492db37SJohannes Berg lr->country_ie_env = ENVIRON_ANY; 38133f2355cbSLuis R. Rodriguez } 38143f2355cbSLuis R. Rodriguez 3815174e0cd2SIlan Peer /* 3816f89769cfSArend van Spriel * See FCC notices for UNII band definitions 3817f89769cfSArend van Spriel * 5GHz: https://www.fcc.gov/document/5-ghz-unlicensed-spectrum-unii 3818f89769cfSArend van Spriel * 6GHz: https://www.fcc.gov/document/fcc-proposes-more-spectrum-unlicensed-use-0 3819174e0cd2SIlan Peer */ 3820174e0cd2SIlan Peer int cfg80211_get_unii(int freq) 3821174e0cd2SIlan Peer { 3822174e0cd2SIlan Peer /* UNII-1 */ 3823174e0cd2SIlan Peer if (freq >= 5150 && freq <= 5250) 3824174e0cd2SIlan Peer return 0; 3825174e0cd2SIlan Peer 3826174e0cd2SIlan Peer /* UNII-2A */ 3827174e0cd2SIlan Peer if (freq > 5250 && freq <= 5350) 3828174e0cd2SIlan Peer return 1; 3829174e0cd2SIlan Peer 3830174e0cd2SIlan Peer /* UNII-2B */ 3831174e0cd2SIlan Peer if (freq > 5350 && freq <= 5470) 3832174e0cd2SIlan Peer return 2; 3833174e0cd2SIlan Peer 3834174e0cd2SIlan Peer /* UNII-2C */ 3835174e0cd2SIlan Peer if (freq > 5470 && freq <= 5725) 3836174e0cd2SIlan Peer return 3; 3837174e0cd2SIlan Peer 3838174e0cd2SIlan Peer /* UNII-3 */ 3839174e0cd2SIlan Peer if (freq > 5725 && freq <= 5825) 3840174e0cd2SIlan Peer return 4; 3841174e0cd2SIlan Peer 3842f89769cfSArend van Spriel /* UNII-5 */ 3843f89769cfSArend van Spriel if (freq > 5925 && freq <= 6425) 3844f89769cfSArend van Spriel return 5; 3845f89769cfSArend van Spriel 3846f89769cfSArend van Spriel /* UNII-6 */ 3847f89769cfSArend van Spriel if (freq > 6425 && freq <= 6525) 3848f89769cfSArend van Spriel return 6; 3849f89769cfSArend van Spriel 3850f89769cfSArend van Spriel /* UNII-7 */ 3851f89769cfSArend van Spriel if (freq > 6525 && freq <= 6875) 3852f89769cfSArend van Spriel return 7; 3853f89769cfSArend van Spriel 3854f89769cfSArend van Spriel /* UNII-8 */ 3855f89769cfSArend van Spriel if (freq > 6875 && freq <= 7125) 3856f89769cfSArend van Spriel return 8; 3857f89769cfSArend van Spriel 3858174e0cd2SIlan Peer return -EINVAL; 3859174e0cd2SIlan Peer } 3860174e0cd2SIlan Peer 3861c8866e55SIlan Peer bool regulatory_indoor_allowed(void) 3862c8866e55SIlan Peer { 3863c8866e55SIlan Peer return reg_is_indoor; 3864c8866e55SIlan Peer } 3865c8866e55SIlan Peer 3866b35a51c7SVasanthakumar Thiagarajan bool regulatory_pre_cac_allowed(struct wiphy *wiphy) 3867b35a51c7SVasanthakumar Thiagarajan { 3868b35a51c7SVasanthakumar Thiagarajan const struct ieee80211_regdomain *regd = NULL; 3869b35a51c7SVasanthakumar Thiagarajan const struct ieee80211_regdomain *wiphy_regd = NULL; 3870b35a51c7SVasanthakumar Thiagarajan bool pre_cac_allowed = false; 3871b35a51c7SVasanthakumar Thiagarajan 3872b35a51c7SVasanthakumar Thiagarajan rcu_read_lock(); 3873b35a51c7SVasanthakumar Thiagarajan 3874b35a51c7SVasanthakumar Thiagarajan regd = rcu_dereference(cfg80211_regdomain); 3875b35a51c7SVasanthakumar Thiagarajan wiphy_regd = rcu_dereference(wiphy->regd); 3876b35a51c7SVasanthakumar Thiagarajan if (!wiphy_regd) { 3877b35a51c7SVasanthakumar Thiagarajan if (regd->dfs_region == NL80211_DFS_ETSI) 3878b35a51c7SVasanthakumar Thiagarajan pre_cac_allowed = true; 3879b35a51c7SVasanthakumar Thiagarajan 3880b35a51c7SVasanthakumar Thiagarajan rcu_read_unlock(); 3881b35a51c7SVasanthakumar Thiagarajan 3882b35a51c7SVasanthakumar Thiagarajan return pre_cac_allowed; 3883b35a51c7SVasanthakumar Thiagarajan } 3884b35a51c7SVasanthakumar Thiagarajan 3885b35a51c7SVasanthakumar Thiagarajan if (regd->dfs_region == wiphy_regd->dfs_region && 3886b35a51c7SVasanthakumar Thiagarajan wiphy_regd->dfs_region == NL80211_DFS_ETSI) 3887b35a51c7SVasanthakumar Thiagarajan pre_cac_allowed = true; 3888b35a51c7SVasanthakumar Thiagarajan 3889b35a51c7SVasanthakumar Thiagarajan rcu_read_unlock(); 3890b35a51c7SVasanthakumar Thiagarajan 3891b35a51c7SVasanthakumar Thiagarajan return pre_cac_allowed; 3892b35a51c7SVasanthakumar Thiagarajan } 3893dc0c18edSAaron Komisar EXPORT_SYMBOL(regulatory_pre_cac_allowed); 3894b35a51c7SVasanthakumar Thiagarajan 389526ec17a1SOrr Mazor static void cfg80211_check_and_end_cac(struct cfg80211_registered_device *rdev) 389626ec17a1SOrr Mazor { 389726ec17a1SOrr Mazor struct wireless_dev *wdev; 389826ec17a1SOrr Mazor /* If we finished CAC or received radar, we should end any 389926ec17a1SOrr Mazor * CAC running on the same channels. 390026ec17a1SOrr Mazor * the check !cfg80211_chandef_dfs_usable contain 2 options: 390126ec17a1SOrr Mazor * either all channels are available - those the CAC_FINISHED 390226ec17a1SOrr Mazor * event has effected another wdev state, or there is a channel 390326ec17a1SOrr Mazor * in unavailable state in wdev chandef - those the RADAR_DETECTED 390426ec17a1SOrr Mazor * event has effected another wdev state. 390526ec17a1SOrr Mazor * In both cases we should end the CAC on the wdev. 390626ec17a1SOrr Mazor */ 390726ec17a1SOrr Mazor list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) { 390826ec17a1SOrr Mazor if (wdev->cac_started && 390926ec17a1SOrr Mazor !cfg80211_chandef_dfs_usable(&rdev->wiphy, &wdev->chandef)) 391026ec17a1SOrr Mazor rdev_end_cac(rdev, wdev->netdev); 391126ec17a1SOrr Mazor } 391226ec17a1SOrr Mazor } 391326ec17a1SOrr Mazor 391489766727SVasanthakumar Thiagarajan void regulatory_propagate_dfs_state(struct wiphy *wiphy, 391589766727SVasanthakumar Thiagarajan struct cfg80211_chan_def *chandef, 391689766727SVasanthakumar Thiagarajan enum nl80211_dfs_state dfs_state, 391789766727SVasanthakumar Thiagarajan enum nl80211_radar_event event) 391889766727SVasanthakumar Thiagarajan { 391989766727SVasanthakumar Thiagarajan struct cfg80211_registered_device *rdev; 392089766727SVasanthakumar Thiagarajan 392189766727SVasanthakumar Thiagarajan ASSERT_RTNL(); 392289766727SVasanthakumar Thiagarajan 392389766727SVasanthakumar Thiagarajan if (WARN_ON(!cfg80211_chandef_valid(chandef))) 392489766727SVasanthakumar Thiagarajan return; 392589766727SVasanthakumar Thiagarajan 392689766727SVasanthakumar Thiagarajan list_for_each_entry(rdev, &cfg80211_rdev_list, list) { 392789766727SVasanthakumar Thiagarajan if (wiphy == &rdev->wiphy) 392889766727SVasanthakumar Thiagarajan continue; 392989766727SVasanthakumar Thiagarajan 393089766727SVasanthakumar Thiagarajan if (!reg_dfs_domain_same(wiphy, &rdev->wiphy)) 393189766727SVasanthakumar Thiagarajan continue; 393289766727SVasanthakumar Thiagarajan 393389766727SVasanthakumar Thiagarajan if (!ieee80211_get_channel(&rdev->wiphy, 393489766727SVasanthakumar Thiagarajan chandef->chan->center_freq)) 393589766727SVasanthakumar Thiagarajan continue; 393689766727SVasanthakumar Thiagarajan 393789766727SVasanthakumar Thiagarajan cfg80211_set_dfs_state(&rdev->wiphy, chandef, dfs_state); 393889766727SVasanthakumar Thiagarajan 393989766727SVasanthakumar Thiagarajan if (event == NL80211_RADAR_DETECTED || 394026ec17a1SOrr Mazor event == NL80211_RADAR_CAC_FINISHED) { 394189766727SVasanthakumar Thiagarajan cfg80211_sched_dfs_chan_update(rdev); 394226ec17a1SOrr Mazor cfg80211_check_and_end_cac(rdev); 394326ec17a1SOrr Mazor } 394489766727SVasanthakumar Thiagarajan 394589766727SVasanthakumar Thiagarajan nl80211_radar_notify(rdev, chandef, event, NULL, GFP_KERNEL); 394689766727SVasanthakumar Thiagarajan } 394789766727SVasanthakumar Thiagarajan } 394889766727SVasanthakumar Thiagarajan 3949d7be102fSJohannes Berg static int __init regulatory_init_db(void) 3950b2e1b302SLuis R. Rodriguez { 3951d7be102fSJohannes Berg int err; 3952734366deSJohannes Berg 395371e5e886SJohannes Berg /* 395471e5e886SJohannes Berg * It's possible that - due to other bugs/issues - cfg80211 395571e5e886SJohannes Berg * never called regulatory_init() below, or that it failed; 395671e5e886SJohannes Berg * in that case, don't try to do any further work here as 395771e5e886SJohannes Berg * it's doomed to lead to crashes. 395871e5e886SJohannes Berg */ 395971e5e886SJohannes Berg if (IS_ERR_OR_NULL(reg_pdev)) 396071e5e886SJohannes Berg return -EINVAL; 396171e5e886SJohannes Berg 396290a53e44SJohannes Berg err = load_builtin_regdb_keys(); 396390a53e44SJohannes Berg if (err) 396490a53e44SJohannes Berg return err; 396590a53e44SJohannes Berg 3966ae9e4b0dSLuis R. Rodriguez /* We always try to get an update for the static regdomain */ 3967458f4f9eSJohannes Berg err = regulatory_hint_core(cfg80211_world_regdom->alpha2); 3968bcf4f99bSLuis R. Rodriguez if (err) { 396909d11800SOla Olsson if (err == -ENOMEM) { 397009d11800SOla Olsson platform_device_unregister(reg_pdev); 3971bcf4f99bSLuis R. Rodriguez return err; 397209d11800SOla Olsson } 3973bcf4f99bSLuis R. Rodriguez /* 3974bcf4f99bSLuis R. Rodriguez * N.B. kobject_uevent_env() can fail mainly for when we're out 3975bcf4f99bSLuis R. Rodriguez * memory which is handled and propagated appropriately above 3976bcf4f99bSLuis R. Rodriguez * but it can also fail during a netlink_broadcast() or during 3977bcf4f99bSLuis R. Rodriguez * early boot for call_usermodehelper(). For now treat these 3978bcf4f99bSLuis R. Rodriguez * errors as non-fatal. 3979bcf4f99bSLuis R. Rodriguez */ 3980e9c0268fSJoe Perches pr_err("kobject_uevent_env() was unable to call CRDA during init\n"); 3981bcf4f99bSLuis R. Rodriguez } 3982734366deSJohannes Berg 3983ae9e4b0dSLuis R. Rodriguez /* 3984ae9e4b0dSLuis R. Rodriguez * Finally, if the user set the module parameter treat it 3985ae9e4b0dSLuis R. Rodriguez * as a user hint. 3986ae9e4b0dSLuis R. Rodriguez */ 3987ae9e4b0dSLuis R. Rodriguez if (!is_world_regdom(ieee80211_regdom)) 398857b5ce07SLuis R. Rodriguez regulatory_hint_user(ieee80211_regdom, 398957b5ce07SLuis R. Rodriguez NL80211_USER_REG_HINT_USER); 3990ae9e4b0dSLuis R. Rodriguez 3991b2e1b302SLuis R. Rodriguez return 0; 3992b2e1b302SLuis R. Rodriguez } 3993d7be102fSJohannes Berg #ifndef MODULE 3994d7be102fSJohannes Berg late_initcall(regulatory_init_db); 3995d7be102fSJohannes Berg #endif 3996d7be102fSJohannes Berg 3997d7be102fSJohannes Berg int __init regulatory_init(void) 3998d7be102fSJohannes Berg { 3999d7be102fSJohannes Berg reg_pdev = platform_device_register_simple("regulatory", 0, NULL, 0); 4000d7be102fSJohannes Berg if (IS_ERR(reg_pdev)) 4001d7be102fSJohannes Berg return PTR_ERR(reg_pdev); 4002d7be102fSJohannes Berg 4003d7be102fSJohannes Berg spin_lock_init(®_requests_lock); 4004d7be102fSJohannes Berg spin_lock_init(®_pending_beacons_lock); 4005d7be102fSJohannes Berg spin_lock_init(®_indoor_lock); 4006d7be102fSJohannes Berg 4007d7be102fSJohannes Berg rcu_assign_pointer(cfg80211_regdomain, cfg80211_world_regdom); 4008d7be102fSJohannes Berg 4009d7be102fSJohannes Berg user_alpha2[0] = '9'; 4010d7be102fSJohannes Berg user_alpha2[1] = '7'; 4011d7be102fSJohannes Berg 4012d7be102fSJohannes Berg #ifdef MODULE 4013d7be102fSJohannes Berg return regulatory_init_db(); 4014d7be102fSJohannes Berg #else 4015d7be102fSJohannes Berg return 0; 4016d7be102fSJohannes Berg #endif 4017d7be102fSJohannes Berg } 4018b2e1b302SLuis R. Rodriguez 40191a919318SJohannes Berg void regulatory_exit(void) 4020b2e1b302SLuis R. Rodriguez { 4021fe33eb39SLuis R. Rodriguez struct regulatory_request *reg_request, *tmp; 4022e38f8a7aSLuis R. Rodriguez struct reg_beacon *reg_beacon, *btmp; 4023fe33eb39SLuis R. Rodriguez 4024fe33eb39SLuis R. Rodriguez cancel_work_sync(®_work); 4025b6863036SJohannes Berg cancel_crda_timeout_sync(); 4026ad932f04SArik Nemtsov cancel_delayed_work_sync(®_check_chans); 4027fe33eb39SLuis R. Rodriguez 40289027b149SJohannes Berg /* Lock to suppress warnings */ 402938fd2143SJohannes Berg rtnl_lock(); 4030379b82f4SJohannes Berg reset_regdomains(true, NULL); 403138fd2143SJohannes Berg rtnl_unlock(); 4032734366deSJohannes Berg 403358ebacc6SLuis R. Rodriguez dev_set_uevent_suppress(®_pdev->dev, true); 4034f6037d09SJohannes Berg 4035b2e1b302SLuis R. Rodriguez platform_device_unregister(reg_pdev); 4036734366deSJohannes Berg 4037fea9bcedSJohannes Berg list_for_each_entry_safe(reg_beacon, btmp, ®_pending_beacons, list) { 4038e38f8a7aSLuis R. Rodriguez list_del(®_beacon->list); 4039e38f8a7aSLuis R. Rodriguez kfree(reg_beacon); 4040e38f8a7aSLuis R. Rodriguez } 4041e38f8a7aSLuis R. Rodriguez 4042fea9bcedSJohannes Berg list_for_each_entry_safe(reg_beacon, btmp, ®_beacon_list, list) { 4043e38f8a7aSLuis R. Rodriguez list_del(®_beacon->list); 4044e38f8a7aSLuis R. Rodriguez kfree(reg_beacon); 4045e38f8a7aSLuis R. Rodriguez } 4046e38f8a7aSLuis R. Rodriguez 4047fea9bcedSJohannes Berg list_for_each_entry_safe(reg_request, tmp, ®_requests_list, list) { 4048fe33eb39SLuis R. Rodriguez list_del(®_request->list); 4049fe33eb39SLuis R. Rodriguez kfree(reg_request); 4050fe33eb39SLuis R. Rodriguez } 4051007f6c5eSJohannes Berg 4052007f6c5eSJohannes Berg if (!IS_ERR_OR_NULL(regdb)) 4053007f6c5eSJohannes Berg kfree(regdb); 4054e646a025SJohannes Berg if (!IS_ERR_OR_NULL(cfg80211_user_regdom)) 4055e646a025SJohannes Berg kfree(cfg80211_user_regdom); 405690a53e44SJohannes Berg 405790a53e44SJohannes Berg free_regdb_keyring(); 4058fe33eb39SLuis R. Rodriguez } 4059