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; 15721e61d82cSHaim Dreyfuss if (rd_flags & NL80211_RRF_NO_HE) 15731e61d82cSHaim Dreyfuss channel_flags |= IEEE80211_CHAN_NO_HE; 1574b2e1b302SLuis R. Rodriguez return channel_flags; 1575b2e1b302SLuis R. Rodriguez } 1576b2e1b302SLuis R. Rodriguez 1577361c9c8bSJohannes Berg static const struct ieee80211_reg_rule * 157849172874SMichal Sojka freq_reg_info_regd(u32 center_freq, 15794edd5698SMatthias May const struct ieee80211_regdomain *regd, u32 bw) 15808318d78aSJohannes Berg { 15818318d78aSJohannes Berg int i; 15820c7dc45dSLuis R. Rodriguez bool band_rule_found = false; 1583038659e7SLuis R. Rodriguez bool bw_fits = false; 1584038659e7SLuis R. Rodriguez 15853e0c3ff3SLuis R. Rodriguez if (!regd) 1586361c9c8bSJohannes Berg return ERR_PTR(-EINVAL); 1587b2e1b302SLuis R. Rodriguez 15883e0c3ff3SLuis R. Rodriguez for (i = 0; i < regd->n_reg_rules; i++) { 1589b2e1b302SLuis R. Rodriguez const struct ieee80211_reg_rule *rr; 1590b2e1b302SLuis R. Rodriguez const struct ieee80211_freq_range *fr = NULL; 1591b2e1b302SLuis R. Rodriguez 15923e0c3ff3SLuis R. Rodriguez rr = ®d->reg_rules[i]; 1593b2e1b302SLuis R. Rodriguez fr = &rr->freq_range; 15940c7dc45dSLuis R. Rodriguez 1595fb1fc7adSLuis R. Rodriguez /* 1596fb1fc7adSLuis R. Rodriguez * We only need to know if one frequency rule was 15970c7dc45dSLuis R. Rodriguez * was in center_freq's band, that's enough, so lets 1598fb1fc7adSLuis R. Rodriguez * not overwrite it once found 1599fb1fc7adSLuis R. Rodriguez */ 16000c7dc45dSLuis R. Rodriguez if (!band_rule_found) 16010c7dc45dSLuis R. Rodriguez band_rule_found = freq_in_rule_band(fr, center_freq); 16020c7dc45dSLuis R. Rodriguez 16034787cfa0SRafał Miłecki bw_fits = cfg80211_does_bw_fit_range(fr, center_freq, bw); 16040c7dc45dSLuis R. Rodriguez 1605361c9c8bSJohannes Berg if (band_rule_found && bw_fits) 1606361c9c8bSJohannes Berg return rr; 16078318d78aSJohannes Berg } 16088318d78aSJohannes Berg 16090c7dc45dSLuis R. Rodriguez if (!band_rule_found) 1610361c9c8bSJohannes Berg return ERR_PTR(-ERANGE); 16110c7dc45dSLuis R. Rodriguez 1612361c9c8bSJohannes Berg return ERR_PTR(-EINVAL); 1613b2e1b302SLuis R. Rodriguez } 1614b2e1b302SLuis R. Rodriguez 16158de1c63bSJohannes Berg static const struct ieee80211_reg_rule * 16168de1c63bSJohannes Berg __freq_reg_info(struct wiphy *wiphy, u32 center_freq, u32 min_bw) 16174edd5698SMatthias May { 16184edd5698SMatthias May const struct ieee80211_regdomain *regd = reg_get_regdomain(wiphy); 16194edd5698SMatthias May const struct ieee80211_reg_rule *reg_rule = NULL; 16204edd5698SMatthias May u32 bw; 16214edd5698SMatthias May 16224edd5698SMatthias May for (bw = MHZ_TO_KHZ(20); bw >= min_bw; bw = bw / 2) { 162349172874SMichal Sojka reg_rule = freq_reg_info_regd(center_freq, regd, bw); 16244edd5698SMatthias May if (!IS_ERR(reg_rule)) 16254edd5698SMatthias May return reg_rule; 16264edd5698SMatthias May } 16274edd5698SMatthias May 16284edd5698SMatthias May return reg_rule; 16294edd5698SMatthias May } 16304edd5698SMatthias May 1631361c9c8bSJohannes Berg const struct ieee80211_reg_rule *freq_reg_info(struct wiphy *wiphy, 1632361c9c8bSJohannes Berg u32 center_freq) 16331fa25e41SLuis R. Rodriguez { 16344edd5698SMatthias May return __freq_reg_info(wiphy, center_freq, MHZ_TO_KHZ(20)); 16351fa25e41SLuis R. Rodriguez } 16364f366c5dSJohn W. Linville EXPORT_SYMBOL(freq_reg_info); 1637b2e1b302SLuis R. Rodriguez 1638034c6d6eSLuis R. Rodriguez const char *reg_initiator_name(enum nl80211_reg_initiator initiator) 1639926a0a09SLuis R. Rodriguez { 1640926a0a09SLuis R. Rodriguez switch (initiator) { 1641926a0a09SLuis R. Rodriguez case NL80211_REGDOM_SET_BY_CORE: 1642034c6d6eSLuis R. Rodriguez return "core"; 1643926a0a09SLuis R. Rodriguez case NL80211_REGDOM_SET_BY_USER: 1644034c6d6eSLuis R. Rodriguez return "user"; 1645926a0a09SLuis R. Rodriguez case NL80211_REGDOM_SET_BY_DRIVER: 1646034c6d6eSLuis R. Rodriguez return "driver"; 1647926a0a09SLuis R. Rodriguez case NL80211_REGDOM_SET_BY_COUNTRY_IE: 16488db0c433SToke Høiland-Jørgensen return "country element"; 1649926a0a09SLuis R. Rodriguez default: 1650926a0a09SLuis R. Rodriguez WARN_ON(1); 1651034c6d6eSLuis R. Rodriguez return "bug"; 1652926a0a09SLuis R. Rodriguez } 1653926a0a09SLuis R. Rodriguez } 1654034c6d6eSLuis R. Rodriguez EXPORT_SYMBOL(reg_initiator_name); 1655e702d3cfSLuis R. Rodriguez 16561aeb135fSMichal Sojka static uint32_t reg_rule_to_chan_bw_flags(const struct ieee80211_regdomain *regd, 16571aeb135fSMichal Sojka const struct ieee80211_reg_rule *reg_rule, 16581aeb135fSMichal Sojka const struct ieee80211_channel *chan) 16591aeb135fSMichal Sojka { 16601aeb135fSMichal Sojka const struct ieee80211_freq_range *freq_range = NULL; 1661934f4c7dSThomas Pedersen u32 max_bandwidth_khz, center_freq_khz, bw_flags = 0; 16621aeb135fSMichal Sojka 16631aeb135fSMichal Sojka freq_range = ®_rule->freq_range; 16641aeb135fSMichal Sojka 16651aeb135fSMichal Sojka max_bandwidth_khz = freq_range->max_bandwidth_khz; 1666934f4c7dSThomas Pedersen center_freq_khz = ieee80211_channel_to_khz(chan); 16671aeb135fSMichal Sojka /* Check if auto calculation requested */ 16681aeb135fSMichal Sojka if (reg_rule->flags & NL80211_RRF_AUTO_BW) 16691aeb135fSMichal Sojka max_bandwidth_khz = reg_get_max_bandwidth(regd, reg_rule); 16701aeb135fSMichal Sojka 16711aeb135fSMichal Sojka /* If we get a reg_rule we can assume that at least 5Mhz fit */ 16724787cfa0SRafał Miłecki if (!cfg80211_does_bw_fit_range(freq_range, 1673934f4c7dSThomas Pedersen center_freq_khz, 16741aeb135fSMichal Sojka MHZ_TO_KHZ(10))) 16751aeb135fSMichal Sojka bw_flags |= IEEE80211_CHAN_NO_10MHZ; 16764787cfa0SRafał Miłecki if (!cfg80211_does_bw_fit_range(freq_range, 1677934f4c7dSThomas Pedersen center_freq_khz, 16781aeb135fSMichal Sojka MHZ_TO_KHZ(20))) 16791aeb135fSMichal Sojka bw_flags |= IEEE80211_CHAN_NO_20MHZ; 16801aeb135fSMichal Sojka 16811aeb135fSMichal Sojka if (max_bandwidth_khz < MHZ_TO_KHZ(10)) 16821aeb135fSMichal Sojka bw_flags |= IEEE80211_CHAN_NO_10MHZ; 16831aeb135fSMichal Sojka if (max_bandwidth_khz < MHZ_TO_KHZ(20)) 16841aeb135fSMichal Sojka bw_flags |= IEEE80211_CHAN_NO_20MHZ; 16851aeb135fSMichal Sojka if (max_bandwidth_khz < MHZ_TO_KHZ(40)) 16861aeb135fSMichal Sojka bw_flags |= IEEE80211_CHAN_NO_HT40; 16871aeb135fSMichal Sojka if (max_bandwidth_khz < MHZ_TO_KHZ(80)) 16881aeb135fSMichal Sojka bw_flags |= IEEE80211_CHAN_NO_80MHZ; 16891aeb135fSMichal Sojka if (max_bandwidth_khz < MHZ_TO_KHZ(160)) 16901aeb135fSMichal Sojka bw_flags |= IEEE80211_CHAN_NO_160MHZ; 16911aeb135fSMichal Sojka return bw_flags; 16921aeb135fSMichal Sojka } 16931aeb135fSMichal Sojka 1694e33e2241SJohannes Berg /* 1695e33e2241SJohannes Berg * Note that right now we assume the desired channel bandwidth 1696e33e2241SJohannes Berg * is always 20 MHz for each individual channel (HT40 uses 20 MHz 1697e33e2241SJohannes Berg * per channel, the primary and the extension channel). 1698038659e7SLuis R. Rodriguez */ 16997ca43d03SLuis R. Rodriguez static void handle_channel(struct wiphy *wiphy, 17007ca43d03SLuis R. Rodriguez enum nl80211_reg_initiator initiator, 1701fdc9d7b2SJohannes Berg struct ieee80211_channel *chan) 1702b2e1b302SLuis R. Rodriguez { 1703038659e7SLuis R. Rodriguez u32 flags, bw_flags = 0; 1704b2e1b302SLuis R. Rodriguez const struct ieee80211_reg_rule *reg_rule = NULL; 1705b2e1b302SLuis R. Rodriguez const struct ieee80211_power_rule *power_rule = NULL; 1706fe33eb39SLuis R. Rodriguez struct wiphy *request_wiphy = NULL; 1707c492db37SJohannes Berg struct regulatory_request *lr = get_last_request(); 170897524820SJanusz Dziedzic const struct ieee80211_regdomain *regd; 1709a92a3ce7SLuis R. Rodriguez 1710c492db37SJohannes Berg request_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx); 1711a92a3ce7SLuis R. Rodriguez 1712a92a3ce7SLuis R. Rodriguez flags = chan->orig_flags; 1713b2e1b302SLuis R. Rodriguez 1714934f4c7dSThomas Pedersen reg_rule = freq_reg_info(wiphy, ieee80211_channel_to_khz(chan)); 1715361c9c8bSJohannes Berg if (IS_ERR(reg_rule)) { 1716ca4ffe8fSLuis R. Rodriguez /* 1717ca4ffe8fSLuis R. Rodriguez * We will disable all channels that do not match our 171825985edcSLucas De Marchi * received regulatory rule unless the hint is coming 1719ca4ffe8fSLuis R. Rodriguez * from a Country IE and the Country IE had no information 1720ca4ffe8fSLuis R. Rodriguez * about a band. The IEEE 802.11 spec allows for an AP 1721ca4ffe8fSLuis R. Rodriguez * to send only a subset of the regulatory rules allowed, 1722ca4ffe8fSLuis R. Rodriguez * so an AP in the US that only supports 2.4 GHz may only send 1723ca4ffe8fSLuis R. Rodriguez * a country IE with information for the 2.4 GHz band 1724ca4ffe8fSLuis R. Rodriguez * while 5 GHz is still supported. 1725ca4ffe8fSLuis R. Rodriguez */ 1726ca4ffe8fSLuis R. Rodriguez if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE && 1727361c9c8bSJohannes Berg PTR_ERR(reg_rule) == -ERANGE) 17288318d78aSJohannes Berg return; 17298318d78aSJohannes Berg 1730cc493e4fSLuis R. Rodriguez if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER && 1731cc493e4fSLuis R. Rodriguez request_wiphy && request_wiphy == wiphy && 1732a2f73b6cSLuis R. Rodriguez request_wiphy->regulatory_flags & REGULATORY_STRICT_REG) { 1733934f4c7dSThomas Pedersen pr_debug("Disabling freq %d.%03d MHz for good\n", 1734934f4c7dSThomas Pedersen chan->center_freq, chan->freq_offset); 1735cc493e4fSLuis R. Rodriguez chan->orig_flags |= IEEE80211_CHAN_DISABLED; 1736cc493e4fSLuis R. Rodriguez chan->flags = chan->orig_flags; 1737cc493e4fSLuis R. Rodriguez } else { 1738934f4c7dSThomas Pedersen pr_debug("Disabling freq %d.%03d MHz\n", 1739934f4c7dSThomas Pedersen chan->center_freq, chan->freq_offset); 1740990de49fSJohannes Berg chan->flags |= IEEE80211_CHAN_DISABLED; 1741cc493e4fSLuis R. Rodriguez } 1742ca4ffe8fSLuis R. Rodriguez return; 1743ca4ffe8fSLuis R. Rodriguez } 1744ca4ffe8fSLuis R. Rodriguez 1745b0dfd2eaSJanusz Dziedzic regd = reg_get_regdomain(wiphy); 1746e702d3cfSLuis R. Rodriguez 1747b2e1b302SLuis R. Rodriguez power_rule = ®_rule->power_rule; 17481aeb135fSMichal Sojka bw_flags = reg_rule_to_chan_bw_flags(regd, reg_rule, chan); 1749b2e1b302SLuis R. Rodriguez 1750c492db37SJohannes Berg if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER && 1751806a9e39SLuis R. Rodriguez request_wiphy && request_wiphy == wiphy && 1752a2f73b6cSLuis R. Rodriguez request_wiphy->regulatory_flags & REGULATORY_STRICT_REG) { 1753fb1fc7adSLuis R. Rodriguez /* 175425985edcSLucas De Marchi * This guarantees the driver's requested regulatory domain 1755f976376dSLuis R. Rodriguez * will always be used as a base for further regulatory 1756fb1fc7adSLuis R. Rodriguez * settings 1757fb1fc7adSLuis R. Rodriguez */ 1758f976376dSLuis R. Rodriguez chan->flags = chan->orig_flags = 1759038659e7SLuis R. Rodriguez map_regdom_flags(reg_rule->flags) | bw_flags; 1760f976376dSLuis R. Rodriguez chan->max_antenna_gain = chan->orig_mag = 1761f976376dSLuis R. Rodriguez (int) MBI_TO_DBI(power_rule->max_antenna_gain); 1762279f0f55SFelix Fietkau chan->max_reg_power = chan->max_power = chan->orig_mpwr = 1763f976376dSLuis R. Rodriguez (int) MBM_TO_DBM(power_rule->max_eirp); 17644f267c11SJanusz Dziedzic 17654f267c11SJanusz Dziedzic if (chan->flags & IEEE80211_CHAN_RADAR) { 17664f267c11SJanusz Dziedzic chan->dfs_cac_ms = IEEE80211_DFS_MIN_CAC_TIME_MS; 17674f267c11SJanusz Dziedzic if (reg_rule->dfs_cac_ms) 17684f267c11SJanusz Dziedzic chan->dfs_cac_ms = reg_rule->dfs_cac_ms; 17694f267c11SJanusz Dziedzic } 17704f267c11SJanusz Dziedzic 1771f976376dSLuis R. Rodriguez return; 1772f976376dSLuis R. Rodriguez } 1773f976376dSLuis R. Rodriguez 177404f39047SSimon Wunderlich chan->dfs_state = NL80211_DFS_USABLE; 177504f39047SSimon Wunderlich chan->dfs_state_entered = jiffies; 177604f39047SSimon Wunderlich 1777aa3d7eefSRajkumar Manoharan chan->beacon_found = false; 1778038659e7SLuis R. Rodriguez chan->flags = flags | bw_flags | map_regdom_flags(reg_rule->flags); 17791a919318SJohannes Berg chan->max_antenna_gain = 17801a919318SJohannes Berg min_t(int, chan->orig_mag, 17811a919318SJohannes Berg MBI_TO_DBI(power_rule->max_antenna_gain)); 1782eccc068eSHong Wu chan->max_reg_power = (int) MBM_TO_DBM(power_rule->max_eirp); 1783089027e5SJanusz Dziedzic 1784089027e5SJanusz Dziedzic if (chan->flags & IEEE80211_CHAN_RADAR) { 1785089027e5SJanusz Dziedzic if (reg_rule->dfs_cac_ms) 1786089027e5SJanusz Dziedzic chan->dfs_cac_ms = reg_rule->dfs_cac_ms; 1787089027e5SJanusz Dziedzic else 1788089027e5SJanusz Dziedzic chan->dfs_cac_ms = IEEE80211_DFS_MIN_CAC_TIME_MS; 1789089027e5SJanusz Dziedzic } 1790089027e5SJanusz Dziedzic 17915e31fc08SStanislaw Gruszka if (chan->orig_mpwr) { 17925e31fc08SStanislaw Gruszka /* 1793a09a85a0SLuis R. Rodriguez * Devices that use REGULATORY_COUNTRY_IE_FOLLOW_POWER 1794a09a85a0SLuis R. Rodriguez * will always follow the passed country IE power settings. 17955e31fc08SStanislaw Gruszka */ 17965e31fc08SStanislaw Gruszka if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE && 1797a09a85a0SLuis R. Rodriguez wiphy->regulatory_flags & REGULATORY_COUNTRY_IE_FOLLOW_POWER) 17985e31fc08SStanislaw Gruszka chan->max_power = chan->max_reg_power; 17995e31fc08SStanislaw Gruszka else 18005e31fc08SStanislaw Gruszka chan->max_power = min(chan->orig_mpwr, 18015e31fc08SStanislaw Gruszka chan->max_reg_power); 18025e31fc08SStanislaw Gruszka } else 18035e31fc08SStanislaw Gruszka chan->max_power = chan->max_reg_power; 18048318d78aSJohannes Berg } 18058318d78aSJohannes Berg 18067ca43d03SLuis R. Rodriguez static void handle_band(struct wiphy *wiphy, 1807fdc9d7b2SJohannes Berg enum nl80211_reg_initiator initiator, 1808fdc9d7b2SJohannes Berg struct ieee80211_supported_band *sband) 18098318d78aSJohannes Berg { 1810a92a3ce7SLuis R. Rodriguez unsigned int i; 1811a92a3ce7SLuis R. Rodriguez 1812fdc9d7b2SJohannes Berg if (!sband) 1813fdc9d7b2SJohannes Berg return; 18148318d78aSJohannes Berg 18158318d78aSJohannes Berg for (i = 0; i < sband->n_channels; i++) 1816fdc9d7b2SJohannes Berg handle_channel(wiphy, initiator, &sband->channels[i]); 18178318d78aSJohannes Berg } 18188318d78aSJohannes Berg 181957b5ce07SLuis R. Rodriguez static bool reg_request_cell_base(struct regulatory_request *request) 182057b5ce07SLuis R. Rodriguez { 182157b5ce07SLuis R. Rodriguez if (request->initiator != NL80211_REGDOM_SET_BY_USER) 182257b5ce07SLuis R. Rodriguez return false; 18231a919318SJohannes Berg return request->user_reg_hint_type == NL80211_USER_REG_HINT_CELL_BASE; 182457b5ce07SLuis R. Rodriguez } 182557b5ce07SLuis R. Rodriguez 182657b5ce07SLuis R. Rodriguez bool reg_last_request_cell_base(void) 182757b5ce07SLuis R. Rodriguez { 182838fd2143SJohannes Berg return reg_request_cell_base(get_last_request()); 182957b5ce07SLuis R. Rodriguez } 183057b5ce07SLuis R. Rodriguez 183194fc661fSIlan Peer #ifdef CONFIG_CFG80211_REG_CELLULAR_HINTS 183257b5ce07SLuis R. Rodriguez /* Core specific check */ 18332f92212bSJohannes Berg static enum reg_request_treatment 18342f92212bSJohannes Berg reg_ignore_cell_hint(struct regulatory_request *pending_request) 183557b5ce07SLuis R. Rodriguez { 1836c492db37SJohannes Berg struct regulatory_request *lr = get_last_request(); 183757b5ce07SLuis R. Rodriguez 183857b5ce07SLuis R. Rodriguez if (!reg_num_devs_support_basehint) 18392f92212bSJohannes Berg return REG_REQ_IGNORE; 184057b5ce07SLuis R. Rodriguez 1841c492db37SJohannes Berg if (reg_request_cell_base(lr) && 18421a919318SJohannes Berg !regdom_changes(pending_request->alpha2)) 18432f92212bSJohannes Berg return REG_REQ_ALREADY_SET; 18441a919318SJohannes Berg 18452f92212bSJohannes Berg return REG_REQ_OK; 184657b5ce07SLuis R. Rodriguez } 184757b5ce07SLuis R. Rodriguez 184857b5ce07SLuis R. Rodriguez /* Device specific check */ 184957b5ce07SLuis R. Rodriguez static bool reg_dev_ignore_cell_hint(struct wiphy *wiphy) 185057b5ce07SLuis R. Rodriguez { 18511a919318SJohannes Berg return !(wiphy->features & NL80211_FEATURE_CELL_BASE_REG_HINTS); 185257b5ce07SLuis R. Rodriguez } 185357b5ce07SLuis R. Rodriguez #else 1854a515de66SJohannes Berg static enum reg_request_treatment 1855a515de66SJohannes Berg reg_ignore_cell_hint(struct regulatory_request *pending_request) 185657b5ce07SLuis R. Rodriguez { 18572f92212bSJohannes Berg return REG_REQ_IGNORE; 185857b5ce07SLuis R. Rodriguez } 18591a919318SJohannes Berg 18601a919318SJohannes Berg static bool reg_dev_ignore_cell_hint(struct wiphy *wiphy) 186157b5ce07SLuis R. Rodriguez { 186257b5ce07SLuis R. Rodriguez return true; 186357b5ce07SLuis R. Rodriguez } 186457b5ce07SLuis R. Rodriguez #endif 186557b5ce07SLuis R. Rodriguez 1866fa1fb9cbSLuis R. Rodriguez static bool wiphy_strict_alpha2_regd(struct wiphy *wiphy) 1867fa1fb9cbSLuis R. Rodriguez { 1868a2f73b6cSLuis R. Rodriguez if (wiphy->regulatory_flags & REGULATORY_STRICT_REG && 1869a2f73b6cSLuis R. Rodriguez !(wiphy->regulatory_flags & REGULATORY_CUSTOM_REG)) 1870fa1fb9cbSLuis R. Rodriguez return true; 1871fa1fb9cbSLuis R. Rodriguez return false; 1872fa1fb9cbSLuis R. Rodriguez } 187357b5ce07SLuis R. Rodriguez 18747db90f4aSLuis R. Rodriguez static bool ignore_reg_update(struct wiphy *wiphy, 18757db90f4aSLuis R. Rodriguez enum nl80211_reg_initiator initiator) 187614b9815aSLuis R. Rodriguez { 1877c492db37SJohannes Berg struct regulatory_request *lr = get_last_request(); 1878c492db37SJohannes Berg 1879b0d7aa59SJonathan Doron if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) 1880b0d7aa59SJonathan Doron return true; 1881b0d7aa59SJonathan Doron 1882c492db37SJohannes Berg if (!lr) { 1883c799ba6eSJohannes Berg pr_debug("Ignoring regulatory request set by %s since last_request is not set\n", 1884926a0a09SLuis R. Rodriguez reg_initiator_name(initiator)); 188514b9815aSLuis R. Rodriguez return true; 1886926a0a09SLuis R. Rodriguez } 1887926a0a09SLuis R. Rodriguez 18887db90f4aSLuis R. Rodriguez if (initiator == NL80211_REGDOM_SET_BY_CORE && 1889a2f73b6cSLuis R. Rodriguez wiphy->regulatory_flags & REGULATORY_CUSTOM_REG) { 1890c799ba6eSJohannes Berg pr_debug("Ignoring regulatory request set by %s since the driver uses its own custom regulatory domain\n", 1891926a0a09SLuis R. Rodriguez reg_initiator_name(initiator)); 189214b9815aSLuis R. Rodriguez return true; 1893926a0a09SLuis R. Rodriguez } 1894926a0a09SLuis R. Rodriguez 1895fb1fc7adSLuis R. Rodriguez /* 1896fb1fc7adSLuis R. Rodriguez * wiphy->regd will be set once the device has its own 1897fb1fc7adSLuis R. Rodriguez * desired regulatory domain set 1898fb1fc7adSLuis R. Rodriguez */ 1899fa1fb9cbSLuis R. Rodriguez if (wiphy_strict_alpha2_regd(wiphy) && !wiphy->regd && 1900749b527bSLuis R. Rodriguez initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && 1901c492db37SJohannes Berg !is_world_regdom(lr->alpha2)) { 1902c799ba6eSJohannes Berg pr_debug("Ignoring regulatory request set by %s since the driver requires its own regulatory domain to be set first\n", 1903926a0a09SLuis R. Rodriguez reg_initiator_name(initiator)); 190414b9815aSLuis R. Rodriguez return true; 1905926a0a09SLuis R. Rodriguez } 1906926a0a09SLuis R. Rodriguez 1907c492db37SJohannes Berg if (reg_request_cell_base(lr)) 190857b5ce07SLuis R. Rodriguez return reg_dev_ignore_cell_hint(wiphy); 190957b5ce07SLuis R. Rodriguez 191014b9815aSLuis R. Rodriguez return false; 191114b9815aSLuis R. Rodriguez } 191214b9815aSLuis R. Rodriguez 19133195e489SLuis R. Rodriguez static bool reg_is_world_roaming(struct wiphy *wiphy) 19143195e489SLuis R. Rodriguez { 19153195e489SLuis R. Rodriguez const struct ieee80211_regdomain *cr = get_cfg80211_regdom(); 19163195e489SLuis R. Rodriguez const struct ieee80211_regdomain *wr = get_wiphy_regdom(wiphy); 19173195e489SLuis R. Rodriguez struct regulatory_request *lr = get_last_request(); 19183195e489SLuis R. Rodriguez 19193195e489SLuis R. Rodriguez if (is_world_regdom(cr->alpha2) || (wr && is_world_regdom(wr->alpha2))) 19203195e489SLuis R. Rodriguez return true; 19213195e489SLuis R. Rodriguez 19223195e489SLuis R. Rodriguez if (lr && lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && 1923a2f73b6cSLuis R. Rodriguez wiphy->regulatory_flags & REGULATORY_CUSTOM_REG) 19243195e489SLuis R. Rodriguez return true; 19253195e489SLuis R. Rodriguez 19263195e489SLuis R. Rodriguez return false; 19273195e489SLuis R. Rodriguez } 19283195e489SLuis R. Rodriguez 19291a919318SJohannes Berg static void handle_reg_beacon(struct wiphy *wiphy, unsigned int chan_idx, 1930e38f8a7aSLuis R. Rodriguez struct reg_beacon *reg_beacon) 1931e38f8a7aSLuis R. Rodriguez { 1932e38f8a7aSLuis R. Rodriguez struct ieee80211_supported_band *sband; 1933e38f8a7aSLuis R. Rodriguez struct ieee80211_channel *chan; 19346bad8766SLuis R. Rodriguez bool channel_changed = false; 19356bad8766SLuis R. Rodriguez struct ieee80211_channel chan_before; 1936e38f8a7aSLuis R. Rodriguez 1937e38f8a7aSLuis R. Rodriguez sband = wiphy->bands[reg_beacon->chan.band]; 1938e38f8a7aSLuis R. Rodriguez chan = &sband->channels[chan_idx]; 1939e38f8a7aSLuis R. Rodriguez 1940934f4c7dSThomas Pedersen if (likely(!ieee80211_channel_equal(chan, ®_beacon->chan))) 1941e38f8a7aSLuis R. Rodriguez return; 1942e38f8a7aSLuis R. Rodriguez 19436bad8766SLuis R. Rodriguez if (chan->beacon_found) 19446bad8766SLuis R. Rodriguez return; 19456bad8766SLuis R. Rodriguez 19466bad8766SLuis R. Rodriguez chan->beacon_found = true; 19476bad8766SLuis R. Rodriguez 19480f500a5fSLuis R. Rodriguez if (!reg_is_world_roaming(wiphy)) 19490f500a5fSLuis R. Rodriguez return; 19500f500a5fSLuis R. Rodriguez 1951a2f73b6cSLuis R. Rodriguez if (wiphy->regulatory_flags & REGULATORY_DISABLE_BEACON_HINTS) 195237184244SLuis R. Rodriguez return; 195337184244SLuis R. Rodriguez 1954a48a52b7SJohannes Berg chan_before = *chan; 19556bad8766SLuis R. Rodriguez 19568fe02e16SLuis R. Rodriguez if (chan->flags & IEEE80211_CHAN_NO_IR) { 19578fe02e16SLuis R. Rodriguez chan->flags &= ~IEEE80211_CHAN_NO_IR; 19586bad8766SLuis R. Rodriguez channel_changed = true; 1959e38f8a7aSLuis R. Rodriguez } 1960e38f8a7aSLuis R. Rodriguez 19616bad8766SLuis R. Rodriguez if (channel_changed) 19626bad8766SLuis R. Rodriguez nl80211_send_beacon_hint_event(wiphy, &chan_before, chan); 1963e38f8a7aSLuis R. Rodriguez } 1964e38f8a7aSLuis R. Rodriguez 1965e38f8a7aSLuis R. Rodriguez /* 1966e38f8a7aSLuis R. Rodriguez * Called when a scan on a wiphy finds a beacon on 1967e38f8a7aSLuis R. Rodriguez * new channel 1968e38f8a7aSLuis R. Rodriguez */ 1969e38f8a7aSLuis R. Rodriguez static void wiphy_update_new_beacon(struct wiphy *wiphy, 1970e38f8a7aSLuis R. Rodriguez struct reg_beacon *reg_beacon) 1971e38f8a7aSLuis R. Rodriguez { 1972e38f8a7aSLuis R. Rodriguez unsigned int i; 1973e38f8a7aSLuis R. Rodriguez struct ieee80211_supported_band *sband; 1974e38f8a7aSLuis R. Rodriguez 1975e38f8a7aSLuis R. Rodriguez if (!wiphy->bands[reg_beacon->chan.band]) 1976e38f8a7aSLuis R. Rodriguez return; 1977e38f8a7aSLuis R. Rodriguez 1978e38f8a7aSLuis R. Rodriguez sband = wiphy->bands[reg_beacon->chan.band]; 1979e38f8a7aSLuis R. Rodriguez 1980e38f8a7aSLuis R. Rodriguez for (i = 0; i < sband->n_channels; i++) 1981e38f8a7aSLuis R. Rodriguez handle_reg_beacon(wiphy, i, reg_beacon); 1982e38f8a7aSLuis R. Rodriguez } 1983e38f8a7aSLuis R. Rodriguez 1984e38f8a7aSLuis R. Rodriguez /* 1985e38f8a7aSLuis R. Rodriguez * Called upon reg changes or a new wiphy is added 1986e38f8a7aSLuis R. Rodriguez */ 1987e38f8a7aSLuis R. Rodriguez static void wiphy_update_beacon_reg(struct wiphy *wiphy) 1988e38f8a7aSLuis R. Rodriguez { 1989e38f8a7aSLuis R. Rodriguez unsigned int i; 1990e38f8a7aSLuis R. Rodriguez struct ieee80211_supported_band *sband; 1991e38f8a7aSLuis R. Rodriguez struct reg_beacon *reg_beacon; 1992e38f8a7aSLuis R. Rodriguez 1993e38f8a7aSLuis R. Rodriguez list_for_each_entry(reg_beacon, ®_beacon_list, list) { 1994e38f8a7aSLuis R. Rodriguez if (!wiphy->bands[reg_beacon->chan.band]) 1995e38f8a7aSLuis R. Rodriguez continue; 1996e38f8a7aSLuis R. Rodriguez sband = wiphy->bands[reg_beacon->chan.band]; 1997e38f8a7aSLuis R. Rodriguez for (i = 0; i < sband->n_channels; i++) 1998e38f8a7aSLuis R. Rodriguez handle_reg_beacon(wiphy, i, reg_beacon); 1999e38f8a7aSLuis R. Rodriguez } 2000e38f8a7aSLuis R. Rodriguez } 2001e38f8a7aSLuis R. Rodriguez 2002e38f8a7aSLuis R. Rodriguez /* Reap the advantages of previously found beacons */ 2003e38f8a7aSLuis R. Rodriguez static void reg_process_beacons(struct wiphy *wiphy) 2004e38f8a7aSLuis R. Rodriguez { 2005b1ed8dddSLuis R. Rodriguez /* 2006b1ed8dddSLuis R. Rodriguez * Means we are just firing up cfg80211, so no beacons would 2007b1ed8dddSLuis R. Rodriguez * have been processed yet. 2008b1ed8dddSLuis R. Rodriguez */ 2009b1ed8dddSLuis R. Rodriguez if (!last_request) 2010b1ed8dddSLuis R. Rodriguez return; 2011e38f8a7aSLuis R. Rodriguez wiphy_update_beacon_reg(wiphy); 2012e38f8a7aSLuis R. Rodriguez } 2013e38f8a7aSLuis R. Rodriguez 20141a919318SJohannes Berg static bool is_ht40_allowed(struct ieee80211_channel *chan) 2015038659e7SLuis R. Rodriguez { 2016038659e7SLuis R. Rodriguez if (!chan) 2017038659e7SLuis R. Rodriguez return false; 20181a919318SJohannes Berg if (chan->flags & IEEE80211_CHAN_DISABLED) 20191a919318SJohannes Berg return false; 20201a919318SJohannes Berg /* This would happen when regulatory rules disallow HT40 completely */ 202155b183adSFelix Fietkau if ((chan->flags & IEEE80211_CHAN_NO_HT40) == IEEE80211_CHAN_NO_HT40) 202255b183adSFelix Fietkau return false; 202355b183adSFelix Fietkau return true; 2024038659e7SLuis R. Rodriguez } 2025038659e7SLuis R. Rodriguez 2026038659e7SLuis R. Rodriguez static void reg_process_ht_flags_channel(struct wiphy *wiphy, 2027fdc9d7b2SJohannes Berg struct ieee80211_channel *channel) 2028038659e7SLuis R. Rodriguez { 2029fdc9d7b2SJohannes Berg struct ieee80211_supported_band *sband = wiphy->bands[channel->band]; 2030038659e7SLuis R. Rodriguez struct ieee80211_channel *channel_before = NULL, *channel_after = NULL; 20314e0854a7SEmmanuel Grumbach const struct ieee80211_regdomain *regd; 2032038659e7SLuis R. Rodriguez unsigned int i; 20334e0854a7SEmmanuel Grumbach u32 flags; 2034038659e7SLuis R. Rodriguez 20351a919318SJohannes Berg if (!is_ht40_allowed(channel)) { 2036038659e7SLuis R. Rodriguez channel->flags |= IEEE80211_CHAN_NO_HT40; 2037038659e7SLuis R. Rodriguez return; 2038038659e7SLuis R. Rodriguez } 2039038659e7SLuis R. Rodriguez 2040038659e7SLuis R. Rodriguez /* 2041038659e7SLuis R. Rodriguez * We need to ensure the extension channels exist to 2042038659e7SLuis R. Rodriguez * be able to use HT40- or HT40+, this finds them (or not) 2043038659e7SLuis R. Rodriguez */ 2044038659e7SLuis R. Rodriguez for (i = 0; i < sband->n_channels; i++) { 2045038659e7SLuis R. Rodriguez struct ieee80211_channel *c = &sband->channels[i]; 20461a919318SJohannes Berg 2047038659e7SLuis R. Rodriguez if (c->center_freq == (channel->center_freq - 20)) 2048038659e7SLuis R. Rodriguez channel_before = c; 2049038659e7SLuis R. Rodriguez if (c->center_freq == (channel->center_freq + 20)) 2050038659e7SLuis R. Rodriguez channel_after = c; 2051038659e7SLuis R. Rodriguez } 2052038659e7SLuis R. Rodriguez 20534e0854a7SEmmanuel Grumbach flags = 0; 20544e0854a7SEmmanuel Grumbach regd = get_wiphy_regdom(wiphy); 20554e0854a7SEmmanuel Grumbach if (regd) { 20564e0854a7SEmmanuel Grumbach const struct ieee80211_reg_rule *reg_rule = 20574e0854a7SEmmanuel Grumbach freq_reg_info_regd(MHZ_TO_KHZ(channel->center_freq), 20584e0854a7SEmmanuel Grumbach regd, MHZ_TO_KHZ(20)); 20594e0854a7SEmmanuel Grumbach 20604e0854a7SEmmanuel Grumbach if (!IS_ERR(reg_rule)) 20614e0854a7SEmmanuel Grumbach flags = reg_rule->flags; 20624e0854a7SEmmanuel Grumbach } 20634e0854a7SEmmanuel Grumbach 2064038659e7SLuis R. Rodriguez /* 2065038659e7SLuis R. Rodriguez * Please note that this assumes target bandwidth is 20 MHz, 2066038659e7SLuis R. Rodriguez * if that ever changes we also need to change the below logic 2067038659e7SLuis R. Rodriguez * to include that as well. 2068038659e7SLuis R. Rodriguez */ 20694e0854a7SEmmanuel Grumbach if (!is_ht40_allowed(channel_before) || 20704e0854a7SEmmanuel Grumbach flags & NL80211_RRF_NO_HT40MINUS) 2071689da1b3SLuis R. Rodriguez channel->flags |= IEEE80211_CHAN_NO_HT40MINUS; 2072038659e7SLuis R. Rodriguez else 2073689da1b3SLuis R. Rodriguez channel->flags &= ~IEEE80211_CHAN_NO_HT40MINUS; 2074038659e7SLuis R. Rodriguez 20754e0854a7SEmmanuel Grumbach if (!is_ht40_allowed(channel_after) || 20764e0854a7SEmmanuel Grumbach flags & NL80211_RRF_NO_HT40PLUS) 2077689da1b3SLuis R. Rodriguez channel->flags |= IEEE80211_CHAN_NO_HT40PLUS; 2078038659e7SLuis R. Rodriguez else 2079689da1b3SLuis R. Rodriguez channel->flags &= ~IEEE80211_CHAN_NO_HT40PLUS; 2080038659e7SLuis R. Rodriguez } 2081038659e7SLuis R. Rodriguez 2082038659e7SLuis R. Rodriguez static void reg_process_ht_flags_band(struct wiphy *wiphy, 2083fdc9d7b2SJohannes Berg struct ieee80211_supported_band *sband) 2084038659e7SLuis R. Rodriguez { 2085038659e7SLuis R. Rodriguez unsigned int i; 2086038659e7SLuis R. Rodriguez 2087fdc9d7b2SJohannes Berg if (!sband) 2088fdc9d7b2SJohannes Berg return; 2089038659e7SLuis R. Rodriguez 2090038659e7SLuis R. Rodriguez for (i = 0; i < sband->n_channels; i++) 2091fdc9d7b2SJohannes Berg reg_process_ht_flags_channel(wiphy, &sband->channels[i]); 2092038659e7SLuis R. Rodriguez } 2093038659e7SLuis R. Rodriguez 2094038659e7SLuis R. Rodriguez static void reg_process_ht_flags(struct wiphy *wiphy) 2095038659e7SLuis R. Rodriguez { 209657fbcce3SJohannes Berg enum nl80211_band band; 2097038659e7SLuis R. Rodriguez 2098038659e7SLuis R. Rodriguez if (!wiphy) 2099038659e7SLuis R. Rodriguez return; 2100038659e7SLuis R. Rodriguez 210157fbcce3SJohannes Berg for (band = 0; band < NUM_NL80211_BANDS; band++) 2102fdc9d7b2SJohannes Berg reg_process_ht_flags_band(wiphy, wiphy->bands[band]); 2103038659e7SLuis R. Rodriguez } 2104038659e7SLuis R. Rodriguez 21050e3802dbSLuis R. Rodriguez static void reg_call_notifier(struct wiphy *wiphy, 21060e3802dbSLuis R. Rodriguez struct regulatory_request *request) 21070e3802dbSLuis R. Rodriguez { 21080e3802dbSLuis R. Rodriguez if (wiphy->reg_notifier) 21090e3802dbSLuis R. Rodriguez wiphy->reg_notifier(wiphy, request); 21100e3802dbSLuis R. Rodriguez } 21110e3802dbSLuis R. Rodriguez 2112ad932f04SArik Nemtsov static bool reg_wdev_chan_valid(struct wiphy *wiphy, struct wireless_dev *wdev) 2113ad932f04SArik Nemtsov { 2114f43e5210SJohannes Berg struct cfg80211_chan_def chandef = {}; 2115ad932f04SArik Nemtsov struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); 211620658702SArik Nemtsov enum nl80211_iftype iftype; 2117ad932f04SArik Nemtsov 2118ad932f04SArik Nemtsov wdev_lock(wdev); 211920658702SArik Nemtsov iftype = wdev->iftype; 2120ad932f04SArik Nemtsov 212120658702SArik Nemtsov /* make sure the interface is active */ 2122ad932f04SArik Nemtsov if (!wdev->netdev || !netif_running(wdev->netdev)) 212320658702SArik Nemtsov goto wdev_inactive_unlock; 2124ad932f04SArik Nemtsov 212520658702SArik Nemtsov switch (iftype) { 2126ad932f04SArik Nemtsov case NL80211_IFTYPE_AP: 2127ad932f04SArik Nemtsov case NL80211_IFTYPE_P2P_GO: 2128ad932f04SArik Nemtsov if (!wdev->beacon_interval) 212920658702SArik Nemtsov goto wdev_inactive_unlock; 213020658702SArik Nemtsov chandef = wdev->chandef; 2131ad932f04SArik Nemtsov break; 2132185076d6SArik Nemtsov case NL80211_IFTYPE_ADHOC: 2133185076d6SArik Nemtsov if (!wdev->ssid_len) 213420658702SArik Nemtsov goto wdev_inactive_unlock; 213520658702SArik Nemtsov chandef = wdev->chandef; 2136185076d6SArik Nemtsov break; 2137ad932f04SArik Nemtsov case NL80211_IFTYPE_STATION: 2138ad932f04SArik Nemtsov case NL80211_IFTYPE_P2P_CLIENT: 2139ad932f04SArik Nemtsov if (!wdev->current_bss || 2140ad932f04SArik Nemtsov !wdev->current_bss->pub.channel) 214120658702SArik Nemtsov goto wdev_inactive_unlock; 2142ad932f04SArik Nemtsov 214320658702SArik Nemtsov if (!rdev->ops->get_channel || 214420658702SArik Nemtsov rdev_get_channel(rdev, wdev, &chandef)) 214520658702SArik Nemtsov cfg80211_chandef_create(&chandef, 214620658702SArik Nemtsov wdev->current_bss->pub.channel, 214720658702SArik Nemtsov NL80211_CHAN_NO_HT); 2148ad932f04SArik Nemtsov break; 2149ad932f04SArik Nemtsov case NL80211_IFTYPE_MONITOR: 2150ad932f04SArik Nemtsov case NL80211_IFTYPE_AP_VLAN: 2151ad932f04SArik Nemtsov case NL80211_IFTYPE_P2P_DEVICE: 2152ad932f04SArik Nemtsov /* no enforcement required */ 2153ad932f04SArik Nemtsov break; 2154ad932f04SArik Nemtsov default: 2155ad932f04SArik Nemtsov /* others not implemented for now */ 2156ad932f04SArik Nemtsov WARN_ON(1); 2157ad932f04SArik Nemtsov break; 2158ad932f04SArik Nemtsov } 2159ad932f04SArik Nemtsov 2160ad932f04SArik Nemtsov wdev_unlock(wdev); 216120658702SArik Nemtsov 216220658702SArik Nemtsov switch (iftype) { 216320658702SArik Nemtsov case NL80211_IFTYPE_AP: 216420658702SArik Nemtsov case NL80211_IFTYPE_P2P_GO: 216520658702SArik Nemtsov case NL80211_IFTYPE_ADHOC: 2166923b352fSArik Nemtsov return cfg80211_reg_can_beacon_relax(wiphy, &chandef, iftype); 216720658702SArik Nemtsov case NL80211_IFTYPE_STATION: 216820658702SArik Nemtsov case NL80211_IFTYPE_P2P_CLIENT: 216920658702SArik Nemtsov return cfg80211_chandef_usable(wiphy, &chandef, 217020658702SArik Nemtsov IEEE80211_CHAN_DISABLED); 217120658702SArik Nemtsov default: 217220658702SArik Nemtsov break; 217320658702SArik Nemtsov } 217420658702SArik Nemtsov 217520658702SArik Nemtsov return true; 217620658702SArik Nemtsov 217720658702SArik Nemtsov wdev_inactive_unlock: 217820658702SArik Nemtsov wdev_unlock(wdev); 217920658702SArik Nemtsov return true; 2180ad932f04SArik Nemtsov } 2181ad932f04SArik Nemtsov 2182ad932f04SArik Nemtsov static void reg_leave_invalid_chans(struct wiphy *wiphy) 2183ad932f04SArik Nemtsov { 2184ad932f04SArik Nemtsov struct wireless_dev *wdev; 2185ad932f04SArik Nemtsov struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); 2186ad932f04SArik Nemtsov 2187ad932f04SArik Nemtsov ASSERT_RTNL(); 2188ad932f04SArik Nemtsov 218953873f13SJohannes Berg list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) 2190ad932f04SArik Nemtsov if (!reg_wdev_chan_valid(wiphy, wdev)) 2191ad932f04SArik Nemtsov cfg80211_leave(rdev, wdev); 2192ad932f04SArik Nemtsov } 2193ad932f04SArik Nemtsov 2194ad932f04SArik Nemtsov static void reg_check_chans_work(struct work_struct *work) 2195ad932f04SArik Nemtsov { 2196ad932f04SArik Nemtsov struct cfg80211_registered_device *rdev; 2197ad932f04SArik Nemtsov 2198c799ba6eSJohannes Berg pr_debug("Verifying active interfaces after reg change\n"); 2199ad932f04SArik Nemtsov rtnl_lock(); 2200ad932f04SArik Nemtsov 2201ad932f04SArik Nemtsov list_for_each_entry(rdev, &cfg80211_rdev_list, list) 2202ad932f04SArik Nemtsov if (!(rdev->wiphy.regulatory_flags & 2203ad932f04SArik Nemtsov REGULATORY_IGNORE_STALE_KICKOFF)) 2204ad932f04SArik Nemtsov reg_leave_invalid_chans(&rdev->wiphy); 2205ad932f04SArik Nemtsov 2206ad932f04SArik Nemtsov rtnl_unlock(); 2207ad932f04SArik Nemtsov } 2208ad932f04SArik Nemtsov 2209ad932f04SArik Nemtsov static void reg_check_channels(void) 2210ad932f04SArik Nemtsov { 2211ad932f04SArik Nemtsov /* 2212ad932f04SArik Nemtsov * Give usermode a chance to do something nicer (move to another 2213ad932f04SArik Nemtsov * channel, orderly disconnection), before forcing a disconnection. 2214ad932f04SArik Nemtsov */ 2215ad932f04SArik Nemtsov mod_delayed_work(system_power_efficient_wq, 2216ad932f04SArik Nemtsov ®_check_chans, 2217ad932f04SArik Nemtsov msecs_to_jiffies(REG_ENFORCE_GRACE_MS)); 2218ad932f04SArik Nemtsov } 2219ad932f04SArik Nemtsov 2220eac03e38SSven Neumann static void wiphy_update_regulatory(struct wiphy *wiphy, 22217db90f4aSLuis R. Rodriguez enum nl80211_reg_initiator initiator) 22228318d78aSJohannes Berg { 222357fbcce3SJohannes Berg enum nl80211_band band; 2224c492db37SJohannes Berg struct regulatory_request *lr = get_last_request(); 2225eac03e38SSven Neumann 22260e3802dbSLuis R. Rodriguez if (ignore_reg_update(wiphy, initiator)) { 22270e3802dbSLuis R. Rodriguez /* 22280e3802dbSLuis R. Rodriguez * Regulatory updates set by CORE are ignored for custom 22290e3802dbSLuis R. Rodriguez * regulatory cards. Let us notify the changes to the driver, 22300e3802dbSLuis R. Rodriguez * as some drivers used this to restore its orig_* reg domain. 22310e3802dbSLuis R. Rodriguez */ 22320e3802dbSLuis R. Rodriguez if (initiator == NL80211_REGDOM_SET_BY_CORE && 2233e31f6456SAmar Singhal wiphy->regulatory_flags & REGULATORY_CUSTOM_REG && 2234e31f6456SAmar Singhal !(wiphy->regulatory_flags & 2235e31f6456SAmar Singhal REGULATORY_WIPHY_SELF_MANAGED)) 22360e3802dbSLuis R. Rodriguez reg_call_notifier(wiphy, lr); 2237a203c2aaSSven Neumann return; 22380e3802dbSLuis R. Rodriguez } 2239a203c2aaSSven Neumann 2240c492db37SJohannes Berg lr->dfs_region = get_cfg80211_regdom()->dfs_region; 2241b68e6b3bSLuis R. Rodriguez 224257fbcce3SJohannes Berg for (band = 0; band < NUM_NL80211_BANDS; band++) 2243fdc9d7b2SJohannes Berg handle_band(wiphy, initiator, wiphy->bands[band]); 2244a203c2aaSSven Neumann 2245e38f8a7aSLuis R. Rodriguez reg_process_beacons(wiphy); 2246038659e7SLuis R. Rodriguez reg_process_ht_flags(wiphy); 22470e3802dbSLuis R. Rodriguez reg_call_notifier(wiphy, lr); 2248b2e1b302SLuis R. Rodriguez } 2249b2e1b302SLuis R. Rodriguez 2250d7549cbbSSven Neumann static void update_all_wiphy_regulatory(enum nl80211_reg_initiator initiator) 2251d7549cbbSSven Neumann { 2252d7549cbbSSven Neumann struct cfg80211_registered_device *rdev; 22534a38994fSRajkumar Manoharan struct wiphy *wiphy; 2254d7549cbbSSven Neumann 22555fe231e8SJohannes Berg ASSERT_RTNL(); 2256458f4f9eSJohannes Berg 22574a38994fSRajkumar Manoharan list_for_each_entry(rdev, &cfg80211_rdev_list, list) { 22584a38994fSRajkumar Manoharan wiphy = &rdev->wiphy; 22594a38994fSRajkumar Manoharan wiphy_update_regulatory(wiphy, initiator); 22604a38994fSRajkumar Manoharan } 2261ad932f04SArik Nemtsov 2262ad932f04SArik Nemtsov reg_check_channels(); 2263d7549cbbSSven Neumann } 2264d7549cbbSSven Neumann 22651fa25e41SLuis R. Rodriguez static void handle_channel_custom(struct wiphy *wiphy, 2266fdc9d7b2SJohannes Berg struct ieee80211_channel *chan, 2267c4b9d655SGanapathi Bhat const struct ieee80211_regdomain *regd, 2268c4b9d655SGanapathi Bhat u32 min_bw) 22691fa25e41SLuis R. Rodriguez { 2270038659e7SLuis R. Rodriguez u32 bw_flags = 0; 22711fa25e41SLuis R. Rodriguez const struct ieee80211_reg_rule *reg_rule = NULL; 22721fa25e41SLuis R. Rodriguez const struct ieee80211_power_rule *power_rule = NULL; 2273934f4c7dSThomas Pedersen u32 bw, center_freq_khz; 22741fa25e41SLuis R. Rodriguez 2275934f4c7dSThomas Pedersen center_freq_khz = ieee80211_channel_to_khz(chan); 2276c4b9d655SGanapathi Bhat for (bw = MHZ_TO_KHZ(20); bw >= min_bw; bw = bw / 2) { 2277934f4c7dSThomas Pedersen reg_rule = freq_reg_info_regd(center_freq_khz, regd, bw); 22784edd5698SMatthias May if (!IS_ERR(reg_rule)) 22794edd5698SMatthias May break; 22804edd5698SMatthias May } 22811fa25e41SLuis R. Rodriguez 2282a7ee7d44SJohannes Berg if (IS_ERR_OR_NULL(reg_rule)) { 2283934f4c7dSThomas Pedersen pr_debug("Disabling freq %d.%03d MHz as custom regd has no rule that fits it\n", 2284934f4c7dSThomas Pedersen chan->center_freq, chan->freq_offset); 2285db8dfee5SArik Nemtsov if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) { 2286db8dfee5SArik Nemtsov chan->flags |= IEEE80211_CHAN_DISABLED; 2287db8dfee5SArik Nemtsov } else { 2288cc493e4fSLuis R. Rodriguez chan->orig_flags |= IEEE80211_CHAN_DISABLED; 2289cc493e4fSLuis R. Rodriguez chan->flags = chan->orig_flags; 2290db8dfee5SArik Nemtsov } 22911fa25e41SLuis R. Rodriguez return; 22921fa25e41SLuis R. Rodriguez } 22931fa25e41SLuis R. Rodriguez 22941fa25e41SLuis R. Rodriguez power_rule = ®_rule->power_rule; 22951aeb135fSMichal Sojka bw_flags = reg_rule_to_chan_bw_flags(regd, reg_rule, chan); 2296038659e7SLuis R. Rodriguez 22972e18b38fSArik Nemtsov chan->dfs_state_entered = jiffies; 2298c7ab5081SArik Nemtsov chan->dfs_state = NL80211_DFS_USABLE; 2299c7ab5081SArik Nemtsov 2300c7ab5081SArik Nemtsov chan->beacon_found = false; 2301db8dfee5SArik Nemtsov 2302db8dfee5SArik Nemtsov if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) 2303db8dfee5SArik Nemtsov chan->flags = chan->orig_flags | bw_flags | 2304db8dfee5SArik Nemtsov map_regdom_flags(reg_rule->flags); 2305db8dfee5SArik Nemtsov else 2306038659e7SLuis R. Rodriguez chan->flags |= map_regdom_flags(reg_rule->flags) | bw_flags; 2307db8dfee5SArik Nemtsov 23081fa25e41SLuis R. Rodriguez chan->max_antenna_gain = (int) MBI_TO_DBI(power_rule->max_antenna_gain); 2309279f0f55SFelix Fietkau chan->max_reg_power = chan->max_power = 2310279f0f55SFelix Fietkau (int) MBM_TO_DBM(power_rule->max_eirp); 23112e18b38fSArik Nemtsov 23122e18b38fSArik Nemtsov if (chan->flags & IEEE80211_CHAN_RADAR) { 23132e18b38fSArik Nemtsov if (reg_rule->dfs_cac_ms) 23142e18b38fSArik Nemtsov chan->dfs_cac_ms = reg_rule->dfs_cac_ms; 23152e18b38fSArik Nemtsov else 23162e18b38fSArik Nemtsov chan->dfs_cac_ms = IEEE80211_DFS_MIN_CAC_TIME_MS; 23172e18b38fSArik Nemtsov } 23182e18b38fSArik Nemtsov 23192e18b38fSArik Nemtsov chan->max_power = chan->max_reg_power; 23201fa25e41SLuis R. Rodriguez } 23211fa25e41SLuis R. Rodriguez 2322fdc9d7b2SJohannes Berg static void handle_band_custom(struct wiphy *wiphy, 2323fdc9d7b2SJohannes Berg struct ieee80211_supported_band *sband, 23241fa25e41SLuis R. Rodriguez const struct ieee80211_regdomain *regd) 23251fa25e41SLuis R. Rodriguez { 23261fa25e41SLuis R. Rodriguez unsigned int i; 23271fa25e41SLuis R. Rodriguez 2328fdc9d7b2SJohannes Berg if (!sband) 2329fdc9d7b2SJohannes Berg return; 23301fa25e41SLuis R. Rodriguez 2331c4b9d655SGanapathi Bhat /* 2332c4b9d655SGanapathi Bhat * We currently assume that you always want at least 20 MHz, 2333c4b9d655SGanapathi Bhat * otherwise channel 12 might get enabled if this rule is 2334c4b9d655SGanapathi Bhat * compatible to US, which permits 2402 - 2472 MHz. 2335c4b9d655SGanapathi Bhat */ 23361fa25e41SLuis R. Rodriguez for (i = 0; i < sband->n_channels; i++) 2337c4b9d655SGanapathi Bhat handle_channel_custom(wiphy, &sband->channels[i], regd, 2338c4b9d655SGanapathi Bhat MHZ_TO_KHZ(20)); 23391fa25e41SLuis R. Rodriguez } 23401fa25e41SLuis R. Rodriguez 23411fa25e41SLuis R. Rodriguez /* Used by drivers prior to wiphy registration */ 23421fa25e41SLuis R. Rodriguez void wiphy_apply_custom_regulatory(struct wiphy *wiphy, 23431fa25e41SLuis R. Rodriguez const struct ieee80211_regdomain *regd) 23441fa25e41SLuis R. Rodriguez { 234557fbcce3SJohannes Berg enum nl80211_band band; 2346bbcf3f02SLuis R. Rodriguez unsigned int bands_set = 0; 2347ac46d48eSLuis R. Rodriguez 2348a2f73b6cSLuis R. Rodriguez WARN(!(wiphy->regulatory_flags & REGULATORY_CUSTOM_REG), 2349a2f73b6cSLuis R. Rodriguez "wiphy should have REGULATORY_CUSTOM_REG\n"); 2350a2f73b6cSLuis R. Rodriguez wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG; 2351222ea581SLuis R. Rodriguez 235257fbcce3SJohannes Berg for (band = 0; band < NUM_NL80211_BANDS; band++) { 2353bbcf3f02SLuis R. Rodriguez if (!wiphy->bands[band]) 2354bbcf3f02SLuis R. Rodriguez continue; 2355fdc9d7b2SJohannes Berg handle_band_custom(wiphy, wiphy->bands[band], regd); 2356bbcf3f02SLuis R. Rodriguez bands_set++; 23571fa25e41SLuis R. Rodriguez } 2358bbcf3f02SLuis R. Rodriguez 2359bbcf3f02SLuis R. Rodriguez /* 2360bbcf3f02SLuis R. Rodriguez * no point in calling this if it won't have any effect 23611a919318SJohannes Berg * on your device's supported bands. 2362bbcf3f02SLuis R. Rodriguez */ 2363bbcf3f02SLuis R. Rodriguez WARN_ON(!bands_set); 23641fa25e41SLuis R. Rodriguez } 23651fa25e41SLuis R. Rodriguez EXPORT_SYMBOL(wiphy_apply_custom_regulatory); 23661fa25e41SLuis R. Rodriguez 2367b2e253cfSLuis R. Rodriguez static void reg_set_request_processed(void) 2368b2e253cfSLuis R. Rodriguez { 2369b2e253cfSLuis R. Rodriguez bool need_more_processing = false; 2370c492db37SJohannes Berg struct regulatory_request *lr = get_last_request(); 2371b2e253cfSLuis R. Rodriguez 2372c492db37SJohannes Berg lr->processed = true; 2373b2e253cfSLuis R. Rodriguez 2374b2e253cfSLuis R. Rodriguez spin_lock(®_requests_lock); 2375b2e253cfSLuis R. Rodriguez if (!list_empty(®_requests_list)) 2376b2e253cfSLuis R. Rodriguez need_more_processing = true; 2377b2e253cfSLuis R. Rodriguez spin_unlock(®_requests_lock); 2378b2e253cfSLuis R. Rodriguez 2379b6863036SJohannes Berg cancel_crda_timeout(); 2380a90c7a31SLuis R. Rodriguez 2381b2e253cfSLuis R. Rodriguez if (need_more_processing) 2382b2e253cfSLuis R. Rodriguez schedule_work(®_work); 2383b2e253cfSLuis R. Rodriguez } 2384b2e253cfSLuis R. Rodriguez 2385d1c96a9aSLuis R. Rodriguez /** 2386b3eb7f3fSLuis R. Rodriguez * reg_process_hint_core - process core regulatory requests 2387726e6af9SAndrew Lunn * @core_request: a pending core regulatory request 2388b3eb7f3fSLuis R. Rodriguez * 2389b3eb7f3fSLuis R. Rodriguez * The wireless subsystem can use this function to process 2390b3eb7f3fSLuis R. Rodriguez * a regulatory request issued by the regulatory core. 2391b3eb7f3fSLuis R. Rodriguez */ 2392d34265a3SJohannes Berg static enum reg_request_treatment 2393d34265a3SJohannes Berg reg_process_hint_core(struct regulatory_request *core_request) 2394b3eb7f3fSLuis R. Rodriguez { 2395cecbb069SJohannes Berg if (reg_query_database(core_request)) { 2396b3eb7f3fSLuis R. Rodriguez core_request->intersect = false; 2397b3eb7f3fSLuis R. Rodriguez core_request->processed = false; 239805f1a3eaSLuis R. Rodriguez reg_update_last_request(core_request); 2399d34265a3SJohannes Berg return REG_REQ_OK; 240025b20dbdSJohannes Berg } 2401d34265a3SJohannes Berg 2402d34265a3SJohannes Berg return REG_REQ_IGNORE; 2403b3eb7f3fSLuis R. Rodriguez } 2404b3eb7f3fSLuis R. Rodriguez 24050d97a619SLuis R. Rodriguez static enum reg_request_treatment 24060d97a619SLuis R. Rodriguez __reg_process_hint_user(struct regulatory_request *user_request) 24070d97a619SLuis R. Rodriguez { 24080d97a619SLuis R. Rodriguez struct regulatory_request *lr = get_last_request(); 24090d97a619SLuis R. Rodriguez 24100d97a619SLuis R. Rodriguez if (reg_request_cell_base(user_request)) 24110d97a619SLuis R. Rodriguez return reg_ignore_cell_hint(user_request); 24120d97a619SLuis R. Rodriguez 24130d97a619SLuis R. Rodriguez if (reg_request_cell_base(lr)) 24140d97a619SLuis R. Rodriguez return REG_REQ_IGNORE; 24150d97a619SLuis R. Rodriguez 24160d97a619SLuis R. Rodriguez if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) 24170d97a619SLuis R. Rodriguez return REG_REQ_INTERSECT; 24180d97a619SLuis R. Rodriguez /* 24190d97a619SLuis R. Rodriguez * If the user knows better the user should set the regdom 24200d97a619SLuis R. Rodriguez * to their country before the IE is picked up 24210d97a619SLuis R. Rodriguez */ 24220d97a619SLuis R. Rodriguez if (lr->initiator == NL80211_REGDOM_SET_BY_USER && 24230d97a619SLuis R. Rodriguez lr->intersect) 24240d97a619SLuis R. Rodriguez return REG_REQ_IGNORE; 24250d97a619SLuis R. Rodriguez /* 24260d97a619SLuis R. Rodriguez * Process user requests only after previous user/driver/core 24270d97a619SLuis R. Rodriguez * requests have been processed 24280d97a619SLuis R. Rodriguez */ 24290d97a619SLuis R. Rodriguez if ((lr->initiator == NL80211_REGDOM_SET_BY_CORE || 24300d97a619SLuis R. Rodriguez lr->initiator == NL80211_REGDOM_SET_BY_DRIVER || 24310d97a619SLuis R. Rodriguez lr->initiator == NL80211_REGDOM_SET_BY_USER) && 24320d97a619SLuis R. Rodriguez regdom_changes(lr->alpha2)) 24330d97a619SLuis R. Rodriguez return REG_REQ_IGNORE; 24340d97a619SLuis R. Rodriguez 24350d97a619SLuis R. Rodriguez if (!regdom_changes(user_request->alpha2)) 24360d97a619SLuis R. Rodriguez return REG_REQ_ALREADY_SET; 24370d97a619SLuis R. Rodriguez 24380d97a619SLuis R. Rodriguez return REG_REQ_OK; 24390d97a619SLuis R. Rodriguez } 24400d97a619SLuis R. Rodriguez 24410d97a619SLuis R. Rodriguez /** 24420d97a619SLuis R. Rodriguez * reg_process_hint_user - process user regulatory requests 24430d97a619SLuis R. Rodriguez * @user_request: a pending user regulatory request 24440d97a619SLuis R. Rodriguez * 24450d97a619SLuis R. Rodriguez * The wireless subsystem can use this function to process 24460d97a619SLuis R. Rodriguez * a regulatory request initiated by userspace. 24470d97a619SLuis R. Rodriguez */ 2448d34265a3SJohannes Berg static enum reg_request_treatment 2449d34265a3SJohannes Berg reg_process_hint_user(struct regulatory_request *user_request) 24500d97a619SLuis R. Rodriguez { 24510d97a619SLuis R. Rodriguez enum reg_request_treatment treatment; 24520d97a619SLuis R. Rodriguez 24530d97a619SLuis R. Rodriguez treatment = __reg_process_hint_user(user_request); 24540d97a619SLuis R. Rodriguez if (treatment == REG_REQ_IGNORE || 2455d34265a3SJohannes Berg treatment == REG_REQ_ALREADY_SET) 2456d34265a3SJohannes Berg return REG_REQ_IGNORE; 24570d97a619SLuis R. Rodriguez 24580d97a619SLuis R. Rodriguez user_request->intersect = treatment == REG_REQ_INTERSECT; 24590d97a619SLuis R. Rodriguez user_request->processed = false; 24605ad6ef5eSLuis R. Rodriguez 2461cecbb069SJohannes Berg if (reg_query_database(user_request)) { 246205f1a3eaSLuis R. Rodriguez reg_update_last_request(user_request); 24630d97a619SLuis R. Rodriguez user_alpha2[0] = user_request->alpha2[0]; 24640d97a619SLuis R. Rodriguez user_alpha2[1] = user_request->alpha2[1]; 2465d34265a3SJohannes Berg return REG_REQ_OK; 246625b20dbdSJohannes Berg } 2467d34265a3SJohannes Berg 2468d34265a3SJohannes Berg return REG_REQ_IGNORE; 24690d97a619SLuis R. Rodriguez } 24700d97a619SLuis R. Rodriguez 247121636c7fSLuis R. Rodriguez static enum reg_request_treatment 247221636c7fSLuis R. Rodriguez __reg_process_hint_driver(struct regulatory_request *driver_request) 247321636c7fSLuis R. Rodriguez { 247421636c7fSLuis R. Rodriguez struct regulatory_request *lr = get_last_request(); 247521636c7fSLuis R. Rodriguez 247621636c7fSLuis R. Rodriguez if (lr->initiator == NL80211_REGDOM_SET_BY_CORE) { 247721636c7fSLuis R. Rodriguez if (regdom_changes(driver_request->alpha2)) 247821636c7fSLuis R. Rodriguez return REG_REQ_OK; 247921636c7fSLuis R. Rodriguez return REG_REQ_ALREADY_SET; 248021636c7fSLuis R. Rodriguez } 248121636c7fSLuis R. Rodriguez 248221636c7fSLuis R. Rodriguez /* 248321636c7fSLuis R. Rodriguez * This would happen if you unplug and plug your card 248421636c7fSLuis R. Rodriguez * back in or if you add a new device for which the previously 248521636c7fSLuis R. Rodriguez * loaded card also agrees on the regulatory domain. 248621636c7fSLuis R. Rodriguez */ 248721636c7fSLuis R. Rodriguez if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER && 248821636c7fSLuis R. Rodriguez !regdom_changes(driver_request->alpha2)) 248921636c7fSLuis R. Rodriguez return REG_REQ_ALREADY_SET; 249021636c7fSLuis R. Rodriguez 249121636c7fSLuis R. Rodriguez return REG_REQ_INTERSECT; 249221636c7fSLuis R. Rodriguez } 249321636c7fSLuis R. Rodriguez 249421636c7fSLuis R. Rodriguez /** 249521636c7fSLuis R. Rodriguez * reg_process_hint_driver - process driver regulatory requests 2496726e6af9SAndrew Lunn * @wiphy: the wireless device for the regulatory request 249721636c7fSLuis R. Rodriguez * @driver_request: a pending driver regulatory request 249821636c7fSLuis R. Rodriguez * 249921636c7fSLuis R. Rodriguez * The wireless subsystem can use this function to process 250021636c7fSLuis R. Rodriguez * a regulatory request issued by an 802.11 driver. 250121636c7fSLuis R. Rodriguez * 250221636c7fSLuis R. Rodriguez * Returns one of the different reg request treatment values. 250321636c7fSLuis R. Rodriguez */ 250421636c7fSLuis R. Rodriguez static enum reg_request_treatment 250521636c7fSLuis R. Rodriguez reg_process_hint_driver(struct wiphy *wiphy, 250621636c7fSLuis R. Rodriguez struct regulatory_request *driver_request) 250721636c7fSLuis R. Rodriguez { 250834f05f54SArik Nemtsov const struct ieee80211_regdomain *regd, *tmp; 250921636c7fSLuis R. Rodriguez enum reg_request_treatment treatment; 251021636c7fSLuis R. Rodriguez 251121636c7fSLuis R. Rodriguez treatment = __reg_process_hint_driver(driver_request); 251221636c7fSLuis R. Rodriguez 251321636c7fSLuis R. Rodriguez switch (treatment) { 251421636c7fSLuis R. Rodriguez case REG_REQ_OK: 251521636c7fSLuis R. Rodriguez break; 251621636c7fSLuis R. Rodriguez case REG_REQ_IGNORE: 2517d34265a3SJohannes Berg return REG_REQ_IGNORE; 251821636c7fSLuis R. Rodriguez case REG_REQ_INTERSECT: 251921636c7fSLuis R. Rodriguez case REG_REQ_ALREADY_SET: 252021636c7fSLuis R. Rodriguez regd = reg_copy_regd(get_cfg80211_regdom()); 2521d34265a3SJohannes Berg if (IS_ERR(regd)) 2522d34265a3SJohannes Berg return REG_REQ_IGNORE; 252334f05f54SArik Nemtsov 252434f05f54SArik Nemtsov tmp = get_wiphy_regdom(wiphy); 252521636c7fSLuis R. Rodriguez rcu_assign_pointer(wiphy->regd, regd); 252634f05f54SArik Nemtsov rcu_free_regdom(tmp); 252721636c7fSLuis R. Rodriguez } 252821636c7fSLuis R. Rodriguez 252921636c7fSLuis R. Rodriguez 253021636c7fSLuis R. Rodriguez driver_request->intersect = treatment == REG_REQ_INTERSECT; 253121636c7fSLuis R. Rodriguez driver_request->processed = false; 25325ad6ef5eSLuis R. Rodriguez 253321636c7fSLuis R. Rodriguez /* 253421636c7fSLuis R. Rodriguez * Since CRDA will not be called in this case as we already 253521636c7fSLuis R. Rodriguez * have applied the requested regulatory domain before we just 253621636c7fSLuis R. Rodriguez * inform userspace we have processed the request 253721636c7fSLuis R. Rodriguez */ 253821636c7fSLuis R. Rodriguez if (treatment == REG_REQ_ALREADY_SET) { 253921636c7fSLuis R. Rodriguez nl80211_send_reg_change_event(driver_request); 254025b20dbdSJohannes Berg reg_update_last_request(driver_request); 254121636c7fSLuis R. Rodriguez reg_set_request_processed(); 2542480908a7SJohannes Berg return REG_REQ_ALREADY_SET; 254321636c7fSLuis R. Rodriguez } 254421636c7fSLuis R. Rodriguez 2545d34265a3SJohannes Berg if (reg_query_database(driver_request)) { 254625b20dbdSJohannes Berg reg_update_last_request(driver_request); 254725b20dbdSJohannes Berg return REG_REQ_OK; 254821636c7fSLuis R. Rodriguez } 254921636c7fSLuis R. Rodriguez 2550d34265a3SJohannes Berg return REG_REQ_IGNORE; 2551d34265a3SJohannes Berg } 2552d34265a3SJohannes Berg 2553b23e7a9eSLuis R. Rodriguez static enum reg_request_treatment 2554b23e7a9eSLuis R. Rodriguez __reg_process_hint_country_ie(struct wiphy *wiphy, 2555b23e7a9eSLuis R. Rodriguez struct regulatory_request *country_ie_request) 2556b23e7a9eSLuis R. Rodriguez { 2557b23e7a9eSLuis R. Rodriguez struct wiphy *last_wiphy = NULL; 2558b23e7a9eSLuis R. Rodriguez struct regulatory_request *lr = get_last_request(); 2559b23e7a9eSLuis R. Rodriguez 2560b23e7a9eSLuis R. Rodriguez if (reg_request_cell_base(lr)) { 2561b23e7a9eSLuis R. Rodriguez /* Trust a Cell base station over the AP's country IE */ 2562b23e7a9eSLuis R. Rodriguez if (regdom_changes(country_ie_request->alpha2)) 2563b23e7a9eSLuis R. Rodriguez return REG_REQ_IGNORE; 2564b23e7a9eSLuis R. Rodriguez return REG_REQ_ALREADY_SET; 25652a901468SLuis R. Rodriguez } else { 25662a901468SLuis R. Rodriguez if (wiphy->regulatory_flags & REGULATORY_COUNTRY_IE_IGNORE) 25672a901468SLuis R. Rodriguez return REG_REQ_IGNORE; 2568b23e7a9eSLuis R. Rodriguez } 2569b23e7a9eSLuis R. Rodriguez 2570b23e7a9eSLuis R. Rodriguez if (unlikely(!is_an_alpha2(country_ie_request->alpha2))) 2571b23e7a9eSLuis R. Rodriguez return -EINVAL; 25722f1c6c57SLuis R. Rodriguez 25732f1c6c57SLuis R. Rodriguez if (lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE) 25742f1c6c57SLuis R. Rodriguez return REG_REQ_OK; 25752f1c6c57SLuis R. Rodriguez 25762f1c6c57SLuis R. Rodriguez last_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx); 25772f1c6c57SLuis R. Rodriguez 2578b23e7a9eSLuis R. Rodriguez if (last_wiphy != wiphy) { 2579b23e7a9eSLuis R. Rodriguez /* 2580b23e7a9eSLuis R. Rodriguez * Two cards with two APs claiming different 2581b23e7a9eSLuis R. Rodriguez * Country IE alpha2s. We could 2582b23e7a9eSLuis R. Rodriguez * intersect them, but that seems unlikely 2583b23e7a9eSLuis R. Rodriguez * to be correct. Reject second one for now. 2584b23e7a9eSLuis R. Rodriguez */ 2585b23e7a9eSLuis R. Rodriguez if (regdom_changes(country_ie_request->alpha2)) 2586b23e7a9eSLuis R. Rodriguez return REG_REQ_IGNORE; 2587b23e7a9eSLuis R. Rodriguez return REG_REQ_ALREADY_SET; 2588b23e7a9eSLuis R. Rodriguez } 258970dcec5aSEmmanuel Grumbach 259070dcec5aSEmmanuel Grumbach if (regdom_changes(country_ie_request->alpha2)) 2591b23e7a9eSLuis R. Rodriguez return REG_REQ_OK; 2592b23e7a9eSLuis R. Rodriguez return REG_REQ_ALREADY_SET; 2593b23e7a9eSLuis R. Rodriguez } 2594b23e7a9eSLuis R. Rodriguez 2595b3eb7f3fSLuis R. Rodriguez /** 2596b23e7a9eSLuis R. Rodriguez * reg_process_hint_country_ie - process regulatory requests from country IEs 2597726e6af9SAndrew Lunn * @wiphy: the wireless device for the regulatory request 2598b23e7a9eSLuis R. Rodriguez * @country_ie_request: a regulatory request from a country IE 2599d1c96a9aSLuis R. Rodriguez * 2600b23e7a9eSLuis R. Rodriguez * The wireless subsystem can use this function to process 2601b23e7a9eSLuis R. Rodriguez * a regulatory request issued by a country Information Element. 2602d1c96a9aSLuis R. Rodriguez * 26032f92212bSJohannes Berg * Returns one of the different reg request treatment values. 2604d1c96a9aSLuis R. Rodriguez */ 26052f92212bSJohannes Berg static enum reg_request_treatment 2606b23e7a9eSLuis R. Rodriguez reg_process_hint_country_ie(struct wiphy *wiphy, 2607b23e7a9eSLuis R. Rodriguez struct regulatory_request *country_ie_request) 2608b2e1b302SLuis R. Rodriguez { 26092f92212bSJohannes Berg enum reg_request_treatment treatment; 2610b2e1b302SLuis R. Rodriguez 2611b23e7a9eSLuis R. Rodriguez treatment = __reg_process_hint_country_ie(wiphy, country_ie_request); 2612761cf7ecSLuis R. Rodriguez 26132f92212bSJohannes Berg switch (treatment) { 26142f92212bSJohannes Berg case REG_REQ_OK: 26152f92212bSJohannes Berg break; 2616b23e7a9eSLuis R. Rodriguez case REG_REQ_IGNORE: 2617d34265a3SJohannes Berg return REG_REQ_IGNORE; 2618b23e7a9eSLuis R. Rodriguez case REG_REQ_ALREADY_SET: 2619c888393bSArik Nemtsov reg_free_request(country_ie_request); 2620480908a7SJohannes Berg return REG_REQ_ALREADY_SET; 2621b23e7a9eSLuis R. Rodriguez case REG_REQ_INTERSECT: 2622fb1fc7adSLuis R. Rodriguez /* 2623b23e7a9eSLuis R. Rodriguez * This doesn't happen yet, not sure we 2624b23e7a9eSLuis R. Rodriguez * ever want to support it for this case. 2625fb1fc7adSLuis R. Rodriguez */ 26268db0c433SToke Høiland-Jørgensen WARN_ONCE(1, "Unexpected intersection for country elements"); 2627d34265a3SJohannes Berg return REG_REQ_IGNORE; 2628d951c1ddSLuis R. Rodriguez } 2629b2e1b302SLuis R. Rodriguez 2630b23e7a9eSLuis R. Rodriguez country_ie_request->intersect = false; 2631b23e7a9eSLuis R. Rodriguez country_ie_request->processed = false; 26325ad6ef5eSLuis R. Rodriguez 2633d34265a3SJohannes Berg if (reg_query_database(country_ie_request)) { 263405f1a3eaSLuis R. Rodriguez reg_update_last_request(country_ie_request); 263525b20dbdSJohannes Berg return REG_REQ_OK; 2636b2e1b302SLuis R. Rodriguez } 2637b2e1b302SLuis R. Rodriguez 2638d34265a3SJohannes Berg return REG_REQ_IGNORE; 2639d34265a3SJohannes Berg } 2640d34265a3SJohannes Berg 264189766727SVasanthakumar Thiagarajan bool reg_dfs_domain_same(struct wiphy *wiphy1, struct wiphy *wiphy2) 264289766727SVasanthakumar Thiagarajan { 264389766727SVasanthakumar Thiagarajan const struct ieee80211_regdomain *wiphy1_regd = NULL; 264489766727SVasanthakumar Thiagarajan const struct ieee80211_regdomain *wiphy2_regd = NULL; 264589766727SVasanthakumar Thiagarajan const struct ieee80211_regdomain *cfg80211_regd = NULL; 264689766727SVasanthakumar Thiagarajan bool dfs_domain_same; 264789766727SVasanthakumar Thiagarajan 264889766727SVasanthakumar Thiagarajan rcu_read_lock(); 264989766727SVasanthakumar Thiagarajan 265089766727SVasanthakumar Thiagarajan cfg80211_regd = rcu_dereference(cfg80211_regdomain); 265189766727SVasanthakumar Thiagarajan wiphy1_regd = rcu_dereference(wiphy1->regd); 265289766727SVasanthakumar Thiagarajan if (!wiphy1_regd) 265389766727SVasanthakumar Thiagarajan wiphy1_regd = cfg80211_regd; 265489766727SVasanthakumar Thiagarajan 265589766727SVasanthakumar Thiagarajan wiphy2_regd = rcu_dereference(wiphy2->regd); 265689766727SVasanthakumar Thiagarajan if (!wiphy2_regd) 265789766727SVasanthakumar Thiagarajan wiphy2_regd = cfg80211_regd; 265889766727SVasanthakumar Thiagarajan 265989766727SVasanthakumar Thiagarajan dfs_domain_same = wiphy1_regd->dfs_region == wiphy2_regd->dfs_region; 266089766727SVasanthakumar Thiagarajan 266189766727SVasanthakumar Thiagarajan rcu_read_unlock(); 266289766727SVasanthakumar Thiagarajan 266389766727SVasanthakumar Thiagarajan return dfs_domain_same; 266489766727SVasanthakumar Thiagarajan } 266589766727SVasanthakumar Thiagarajan 266689766727SVasanthakumar Thiagarajan static void reg_copy_dfs_chan_state(struct ieee80211_channel *dst_chan, 266789766727SVasanthakumar Thiagarajan struct ieee80211_channel *src_chan) 266889766727SVasanthakumar Thiagarajan { 266989766727SVasanthakumar Thiagarajan if (!(dst_chan->flags & IEEE80211_CHAN_RADAR) || 267089766727SVasanthakumar Thiagarajan !(src_chan->flags & IEEE80211_CHAN_RADAR)) 267189766727SVasanthakumar Thiagarajan return; 267289766727SVasanthakumar Thiagarajan 267389766727SVasanthakumar Thiagarajan if (dst_chan->flags & IEEE80211_CHAN_DISABLED || 267489766727SVasanthakumar Thiagarajan src_chan->flags & IEEE80211_CHAN_DISABLED) 267589766727SVasanthakumar Thiagarajan return; 267689766727SVasanthakumar Thiagarajan 267789766727SVasanthakumar Thiagarajan if (src_chan->center_freq == dst_chan->center_freq && 267889766727SVasanthakumar Thiagarajan dst_chan->dfs_state == NL80211_DFS_USABLE) { 267989766727SVasanthakumar Thiagarajan dst_chan->dfs_state = src_chan->dfs_state; 268089766727SVasanthakumar Thiagarajan dst_chan->dfs_state_entered = src_chan->dfs_state_entered; 268189766727SVasanthakumar Thiagarajan } 268289766727SVasanthakumar Thiagarajan } 268389766727SVasanthakumar Thiagarajan 268489766727SVasanthakumar Thiagarajan static void wiphy_share_dfs_chan_state(struct wiphy *dst_wiphy, 268589766727SVasanthakumar Thiagarajan struct wiphy *src_wiphy) 268689766727SVasanthakumar Thiagarajan { 268789766727SVasanthakumar Thiagarajan struct ieee80211_supported_band *src_sband, *dst_sband; 268889766727SVasanthakumar Thiagarajan struct ieee80211_channel *src_chan, *dst_chan; 268989766727SVasanthakumar Thiagarajan int i, j, band; 269089766727SVasanthakumar Thiagarajan 269189766727SVasanthakumar Thiagarajan if (!reg_dfs_domain_same(dst_wiphy, src_wiphy)) 269289766727SVasanthakumar Thiagarajan return; 269389766727SVasanthakumar Thiagarajan 269489766727SVasanthakumar Thiagarajan for (band = 0; band < NUM_NL80211_BANDS; band++) { 269589766727SVasanthakumar Thiagarajan dst_sband = dst_wiphy->bands[band]; 269689766727SVasanthakumar Thiagarajan src_sband = src_wiphy->bands[band]; 269789766727SVasanthakumar Thiagarajan if (!dst_sband || !src_sband) 269889766727SVasanthakumar Thiagarajan continue; 269989766727SVasanthakumar Thiagarajan 270089766727SVasanthakumar Thiagarajan for (i = 0; i < dst_sband->n_channels; i++) { 270189766727SVasanthakumar Thiagarajan dst_chan = &dst_sband->channels[i]; 270289766727SVasanthakumar Thiagarajan for (j = 0; j < src_sband->n_channels; j++) { 270389766727SVasanthakumar Thiagarajan src_chan = &src_sband->channels[j]; 270489766727SVasanthakumar Thiagarajan reg_copy_dfs_chan_state(dst_chan, src_chan); 270589766727SVasanthakumar Thiagarajan } 270689766727SVasanthakumar Thiagarajan } 270789766727SVasanthakumar Thiagarajan } 270889766727SVasanthakumar Thiagarajan } 270989766727SVasanthakumar Thiagarajan 271089766727SVasanthakumar Thiagarajan static void wiphy_all_share_dfs_chan_state(struct wiphy *wiphy) 271189766727SVasanthakumar Thiagarajan { 271289766727SVasanthakumar Thiagarajan struct cfg80211_registered_device *rdev; 271389766727SVasanthakumar Thiagarajan 271489766727SVasanthakumar Thiagarajan ASSERT_RTNL(); 271589766727SVasanthakumar Thiagarajan 271689766727SVasanthakumar Thiagarajan list_for_each_entry(rdev, &cfg80211_rdev_list, list) { 271789766727SVasanthakumar Thiagarajan if (wiphy == &rdev->wiphy) 271889766727SVasanthakumar Thiagarajan continue; 271989766727SVasanthakumar Thiagarajan wiphy_share_dfs_chan_state(wiphy, &rdev->wiphy); 272089766727SVasanthakumar Thiagarajan } 272189766727SVasanthakumar Thiagarajan } 272289766727SVasanthakumar Thiagarajan 272330a548c7SLuis R. Rodriguez /* This processes *all* regulatory hints */ 27241daa37c7SLuis R. Rodriguez static void reg_process_hint(struct regulatory_request *reg_request) 2725fe33eb39SLuis R. Rodriguez { 2726fe33eb39SLuis R. Rodriguez struct wiphy *wiphy = NULL; 2727b3eb7f3fSLuis R. Rodriguez enum reg_request_treatment treatment; 27281db58529SYu Zhao enum nl80211_reg_initiator initiator = reg_request->initiator; 2729fe33eb39SLuis R. Rodriguez 2730f4173766SJohannes Berg if (reg_request->wiphy_idx != WIPHY_IDX_INVALID) 2731fe33eb39SLuis R. Rodriguez wiphy = wiphy_idx_to_wiphy(reg_request->wiphy_idx); 2732fe33eb39SLuis R. Rodriguez 27331db58529SYu Zhao switch (initiator) { 2734b3eb7f3fSLuis R. Rodriguez case NL80211_REGDOM_SET_BY_CORE: 2735d34265a3SJohannes Berg treatment = reg_process_hint_core(reg_request); 2736d34265a3SJohannes Berg break; 2737b3eb7f3fSLuis R. Rodriguez case NL80211_REGDOM_SET_BY_USER: 2738d34265a3SJohannes Berg treatment = reg_process_hint_user(reg_request); 2739d34265a3SJohannes Berg break; 2740b3eb7f3fSLuis R. Rodriguez case NL80211_REGDOM_SET_BY_DRIVER: 2741772f0389SIlan Peer if (!wiphy) 2742772f0389SIlan Peer goto out_free; 274321636c7fSLuis R. Rodriguez treatment = reg_process_hint_driver(wiphy, reg_request); 274421636c7fSLuis R. Rodriguez break; 2745b3eb7f3fSLuis R. Rodriguez case NL80211_REGDOM_SET_BY_COUNTRY_IE: 2746772f0389SIlan Peer if (!wiphy) 2747772f0389SIlan Peer goto out_free; 2748b23e7a9eSLuis R. Rodriguez treatment = reg_process_hint_country_ie(wiphy, reg_request); 2749b3eb7f3fSLuis R. Rodriguez break; 2750b3eb7f3fSLuis R. Rodriguez default: 27511db58529SYu Zhao WARN(1, "invalid initiator %d\n", initiator); 2752772f0389SIlan Peer goto out_free; 2753b3eb7f3fSLuis R. Rodriguez } 2754b3eb7f3fSLuis R. Rodriguez 2755d34265a3SJohannes Berg if (treatment == REG_REQ_IGNORE) 2756d34265a3SJohannes Berg goto out_free; 2757d34265a3SJohannes Berg 2758480908a7SJohannes Berg WARN(treatment != REG_REQ_OK && treatment != REG_REQ_ALREADY_SET, 2759480908a7SJohannes Berg "unexpected treatment value %d\n", treatment); 2760480908a7SJohannes Berg 2761841b351cSJohn Linville /* This is required so that the orig_* parameters are saved. 2762841b351cSJohn Linville * NOTE: treatment must be set for any case that reaches here! 2763841b351cSJohn Linville */ 2764b23e7a9eSLuis R. Rodriguez if (treatment == REG_REQ_ALREADY_SET && wiphy && 2765ad932f04SArik Nemtsov wiphy->regulatory_flags & REGULATORY_STRICT_REG) { 27661db58529SYu Zhao wiphy_update_regulatory(wiphy, initiator); 276789766727SVasanthakumar Thiagarajan wiphy_all_share_dfs_chan_state(wiphy); 2768ad932f04SArik Nemtsov reg_check_channels(); 2769ad932f04SArik Nemtsov } 2770772f0389SIlan Peer 2771772f0389SIlan Peer return; 2772772f0389SIlan Peer 2773772f0389SIlan Peer out_free: 2774c888393bSArik Nemtsov reg_free_request(reg_request); 2775fe33eb39SLuis R. Rodriguez } 2776fe33eb39SLuis R. Rodriguez 2777aced43ceSAmar Singhal static void notify_self_managed_wiphys(struct regulatory_request *request) 2778aced43ceSAmar Singhal { 2779aced43ceSAmar Singhal struct cfg80211_registered_device *rdev; 2780aced43ceSAmar Singhal struct wiphy *wiphy; 2781aced43ceSAmar Singhal 2782aced43ceSAmar Singhal list_for_each_entry(rdev, &cfg80211_rdev_list, list) { 2783aced43ceSAmar Singhal wiphy = &rdev->wiphy; 2784aced43ceSAmar Singhal if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED && 2785c82c06ceSSriram R request->initiator == NL80211_REGDOM_SET_BY_USER) 2786aced43ceSAmar Singhal reg_call_notifier(wiphy, request); 2787aced43ceSAmar Singhal } 2788aced43ceSAmar Singhal } 2789aced43ceSAmar Singhal 2790b2e253cfSLuis R. Rodriguez /* 2791b2e253cfSLuis R. Rodriguez * Processes regulatory hints, this is all the NL80211_REGDOM_SET_BY_* 2792b2e253cfSLuis R. Rodriguez * Regulatory hints come on a first come first serve basis and we 2793b2e253cfSLuis R. Rodriguez * must process each one atomically. 2794b2e253cfSLuis R. Rodriguez */ 2795fe33eb39SLuis R. Rodriguez static void reg_process_pending_hints(void) 2796fe33eb39SLuis R. Rodriguez { 2797c492db37SJohannes Berg struct regulatory_request *reg_request, *lr; 2798fe33eb39SLuis R. Rodriguez 2799c492db37SJohannes Berg lr = get_last_request(); 2800b0e2880bSLuis R. Rodriguez 2801b2e253cfSLuis R. Rodriguez /* When last_request->processed becomes true this will be rescheduled */ 2802c492db37SJohannes Berg if (lr && !lr->processed) { 28030d31d4dbSHodaszi, Robert pr_debug("Pending regulatory request, waiting for it to be processed...\n"); 28045fe231e8SJohannes Berg return; 2805b2e253cfSLuis R. Rodriguez } 2806b2e253cfSLuis R. Rodriguez 2807fe33eb39SLuis R. Rodriguez spin_lock(®_requests_lock); 2808b2e253cfSLuis R. Rodriguez 2809b2e253cfSLuis R. Rodriguez if (list_empty(®_requests_list)) { 2810b2e253cfSLuis R. Rodriguez spin_unlock(®_requests_lock); 28115fe231e8SJohannes Berg return; 2812b2e253cfSLuis R. Rodriguez } 2813b2e253cfSLuis R. Rodriguez 2814fe33eb39SLuis R. Rodriguez reg_request = list_first_entry(®_requests_list, 2815fe33eb39SLuis R. Rodriguez struct regulatory_request, 2816fe33eb39SLuis R. Rodriguez list); 2817fe33eb39SLuis R. Rodriguez list_del_init(®_request->list); 2818fe33eb39SLuis R. Rodriguez 2819d951c1ddSLuis R. Rodriguez spin_unlock(®_requests_lock); 2820b0e2880bSLuis R. Rodriguez 2821aced43ceSAmar Singhal notify_self_managed_wiphys(reg_request); 2822ef51fb1dSArik Nemtsov 28231daa37c7SLuis R. Rodriguez reg_process_hint(reg_request); 28242e54a689SBen 28252e54a689SBen lr = get_last_request(); 28262e54a689SBen 28272e54a689SBen spin_lock(®_requests_lock); 28282e54a689SBen if (!list_empty(®_requests_list) && lr && lr->processed) 28292e54a689SBen schedule_work(®_work); 28302e54a689SBen spin_unlock(®_requests_lock); 2831fe33eb39SLuis R. Rodriguez } 2832fe33eb39SLuis R. Rodriguez 2833e38f8a7aSLuis R. Rodriguez /* Processes beacon hints -- this has nothing to do with country IEs */ 2834e38f8a7aSLuis R. Rodriguez static void reg_process_pending_beacon_hints(void) 2835e38f8a7aSLuis R. Rodriguez { 283679c97e97SJohannes Berg struct cfg80211_registered_device *rdev; 2837e38f8a7aSLuis R. Rodriguez struct reg_beacon *pending_beacon, *tmp; 2838e38f8a7aSLuis R. Rodriguez 2839e38f8a7aSLuis R. Rodriguez /* This goes through the _pending_ beacon list */ 2840e38f8a7aSLuis R. Rodriguez spin_lock_bh(®_pending_beacons_lock); 2841e38f8a7aSLuis R. Rodriguez 2842e38f8a7aSLuis R. Rodriguez list_for_each_entry_safe(pending_beacon, tmp, 2843e38f8a7aSLuis R. Rodriguez ®_pending_beacons, list) { 2844e38f8a7aSLuis R. Rodriguez list_del_init(&pending_beacon->list); 2845e38f8a7aSLuis R. Rodriguez 2846e38f8a7aSLuis R. Rodriguez /* Applies the beacon hint to current wiphys */ 284779c97e97SJohannes Berg list_for_each_entry(rdev, &cfg80211_rdev_list, list) 284879c97e97SJohannes Berg wiphy_update_new_beacon(&rdev->wiphy, pending_beacon); 2849e38f8a7aSLuis R. Rodriguez 2850e38f8a7aSLuis R. Rodriguez /* Remembers the beacon hint for new wiphys or reg changes */ 2851e38f8a7aSLuis R. Rodriguez list_add_tail(&pending_beacon->list, ®_beacon_list); 2852e38f8a7aSLuis R. Rodriguez } 2853e38f8a7aSLuis R. Rodriguez 2854e38f8a7aSLuis R. Rodriguez spin_unlock_bh(®_pending_beacons_lock); 2855e38f8a7aSLuis R. Rodriguez } 2856e38f8a7aSLuis R. Rodriguez 2857b0d7aa59SJonathan Doron static void reg_process_self_managed_hints(void) 2858b0d7aa59SJonathan Doron { 2859b0d7aa59SJonathan Doron struct cfg80211_registered_device *rdev; 2860b0d7aa59SJonathan Doron struct wiphy *wiphy; 2861b0d7aa59SJonathan Doron const struct ieee80211_regdomain *tmp; 2862b0d7aa59SJonathan Doron const struct ieee80211_regdomain *regd; 286357fbcce3SJohannes Berg enum nl80211_band band; 2864b0d7aa59SJonathan Doron struct regulatory_request request = {}; 2865b0d7aa59SJonathan Doron 2866b0d7aa59SJonathan Doron list_for_each_entry(rdev, &cfg80211_rdev_list, list) { 2867b0d7aa59SJonathan Doron wiphy = &rdev->wiphy; 2868b0d7aa59SJonathan Doron 2869b0d7aa59SJonathan Doron spin_lock(®_requests_lock); 2870b0d7aa59SJonathan Doron regd = rdev->requested_regd; 2871b0d7aa59SJonathan Doron rdev->requested_regd = NULL; 2872b0d7aa59SJonathan Doron spin_unlock(®_requests_lock); 2873b0d7aa59SJonathan Doron 2874b0d7aa59SJonathan Doron if (regd == NULL) 2875b0d7aa59SJonathan Doron continue; 2876b0d7aa59SJonathan Doron 2877b0d7aa59SJonathan Doron tmp = get_wiphy_regdom(wiphy); 2878b0d7aa59SJonathan Doron rcu_assign_pointer(wiphy->regd, regd); 2879b0d7aa59SJonathan Doron rcu_free_regdom(tmp); 2880b0d7aa59SJonathan Doron 288157fbcce3SJohannes Berg for (band = 0; band < NUM_NL80211_BANDS; band++) 2882b0d7aa59SJonathan Doron handle_band_custom(wiphy, wiphy->bands[band], regd); 2883b0d7aa59SJonathan Doron 2884b0d7aa59SJonathan Doron reg_process_ht_flags(wiphy); 2885b0d7aa59SJonathan Doron 2886b0d7aa59SJonathan Doron request.wiphy_idx = get_wiphy_idx(wiphy); 2887b0d7aa59SJonathan Doron request.alpha2[0] = regd->alpha2[0]; 2888b0d7aa59SJonathan Doron request.alpha2[1] = regd->alpha2[1]; 2889b0d7aa59SJonathan Doron request.initiator = NL80211_REGDOM_SET_BY_DRIVER; 2890b0d7aa59SJonathan Doron 2891b0d7aa59SJonathan Doron nl80211_send_wiphy_reg_change_event(&request); 2892b0d7aa59SJonathan Doron } 2893b0d7aa59SJonathan Doron 2894b0d7aa59SJonathan Doron reg_check_channels(); 2895b0d7aa59SJonathan Doron } 2896b0d7aa59SJonathan Doron 2897fe33eb39SLuis R. Rodriguez static void reg_todo(struct work_struct *work) 2898fe33eb39SLuis R. Rodriguez { 28995fe231e8SJohannes Berg rtnl_lock(); 2900fe33eb39SLuis R. Rodriguez reg_process_pending_hints(); 2901e38f8a7aSLuis R. Rodriguez reg_process_pending_beacon_hints(); 2902b0d7aa59SJonathan Doron reg_process_self_managed_hints(); 29035fe231e8SJohannes Berg rtnl_unlock(); 2904fe33eb39SLuis R. Rodriguez } 2905fe33eb39SLuis R. Rodriguez 2906fe33eb39SLuis R. Rodriguez static void queue_regulatory_request(struct regulatory_request *request) 2907fe33eb39SLuis R. Rodriguez { 2908c61029c7SJohn W. Linville request->alpha2[0] = toupper(request->alpha2[0]); 2909c61029c7SJohn W. Linville request->alpha2[1] = toupper(request->alpha2[1]); 2910c61029c7SJohn W. Linville 2911fe33eb39SLuis R. Rodriguez spin_lock(®_requests_lock); 2912fe33eb39SLuis R. Rodriguez list_add_tail(&request->list, ®_requests_list); 2913fe33eb39SLuis R. Rodriguez spin_unlock(®_requests_lock); 2914fe33eb39SLuis R. Rodriguez 2915fe33eb39SLuis R. Rodriguez schedule_work(®_work); 2916fe33eb39SLuis R. Rodriguez } 2917fe33eb39SLuis R. Rodriguez 291809d989d1SLuis R. Rodriguez /* 291909d989d1SLuis R. Rodriguez * Core regulatory hint -- happens during cfg80211_init() 292009d989d1SLuis R. Rodriguez * and when we restore regulatory settings. 292109d989d1SLuis R. Rodriguez */ 2922ba25c141SLuis R. Rodriguez static int regulatory_hint_core(const char *alpha2) 2923ba25c141SLuis R. Rodriguez { 2924ba25c141SLuis R. Rodriguez struct regulatory_request *request; 2925ba25c141SLuis R. Rodriguez 29261a919318SJohannes Berg request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); 2927ba25c141SLuis R. Rodriguez if (!request) 2928ba25c141SLuis R. Rodriguez return -ENOMEM; 2929ba25c141SLuis R. Rodriguez 2930ba25c141SLuis R. Rodriguez request->alpha2[0] = alpha2[0]; 2931ba25c141SLuis R. Rodriguez request->alpha2[1] = alpha2[1]; 29327db90f4aSLuis R. Rodriguez request->initiator = NL80211_REGDOM_SET_BY_CORE; 293324f33e64SAndrei Otcheretianski request->wiphy_idx = WIPHY_IDX_INVALID; 2934ba25c141SLuis R. Rodriguez 293531e99729SLuis R. Rodriguez queue_regulatory_request(request); 29365078b2e3SLuis R. Rodriguez 2937fe33eb39SLuis R. Rodriguez return 0; 2938ba25c141SLuis R. Rodriguez } 2939ba25c141SLuis R. Rodriguez 2940fe33eb39SLuis R. Rodriguez /* User hints */ 294157b5ce07SLuis R. Rodriguez int regulatory_hint_user(const char *alpha2, 294257b5ce07SLuis R. Rodriguez enum nl80211_user_reg_hint_type user_reg_hint_type) 2943b2e1b302SLuis R. Rodriguez { 2944fe33eb39SLuis R. Rodriguez struct regulatory_request *request; 2945fe33eb39SLuis R. Rodriguez 2946fdc9d7b2SJohannes Berg if (WARN_ON(!alpha2)) 2947fdc9d7b2SJohannes Berg return -EINVAL; 2948b2e1b302SLuis R. Rodriguez 294947caf685SJohannes Berg if (!is_world_regdom(alpha2) && !is_an_alpha2(alpha2)) 295047caf685SJohannes Berg return -EINVAL; 295147caf685SJohannes Berg 2952fe33eb39SLuis R. Rodriguez request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); 2953fe33eb39SLuis R. Rodriguez if (!request) 2954fe33eb39SLuis R. Rodriguez return -ENOMEM; 2955fe33eb39SLuis R. Rodriguez 2956f4173766SJohannes Berg request->wiphy_idx = WIPHY_IDX_INVALID; 2957fe33eb39SLuis R. Rodriguez request->alpha2[0] = alpha2[0]; 2958fe33eb39SLuis R. Rodriguez request->alpha2[1] = alpha2[1]; 2959e12822e1SLuis R. Rodriguez request->initiator = NL80211_REGDOM_SET_BY_USER; 296057b5ce07SLuis R. Rodriguez request->user_reg_hint_type = user_reg_hint_type; 2961fe33eb39SLuis R. Rodriguez 2962c37722bdSIlan peer /* Allow calling CRDA again */ 2963b6863036SJohannes Berg reset_crda_timeouts(); 2964c37722bdSIlan peer 2965fe33eb39SLuis R. Rodriguez queue_regulatory_request(request); 2966fe33eb39SLuis R. Rodriguez 2967fe33eb39SLuis R. Rodriguez return 0; 2968fe33eb39SLuis R. Rodriguez } 2969fe33eb39SLuis R. Rodriguez 297005050753SIlan peer int regulatory_hint_indoor(bool is_indoor, u32 portid) 297152616f2bSIlan Peer { 297205050753SIlan peer spin_lock(®_indoor_lock); 297352616f2bSIlan Peer 297405050753SIlan peer /* It is possible that more than one user space process is trying to 297505050753SIlan peer * configure the indoor setting. To handle such cases, clear the indoor 297605050753SIlan peer * setting in case that some process does not think that the device 297705050753SIlan peer * is operating in an indoor environment. In addition, if a user space 297805050753SIlan peer * process indicates that it is controlling the indoor setting, save its 297905050753SIlan peer * portid, i.e., make it the owner. 298005050753SIlan peer */ 298105050753SIlan peer reg_is_indoor = is_indoor; 298205050753SIlan peer if (reg_is_indoor) { 298305050753SIlan peer if (!reg_is_indoor_portid) 298405050753SIlan peer reg_is_indoor_portid = portid; 298505050753SIlan peer } else { 298605050753SIlan peer reg_is_indoor_portid = 0; 298705050753SIlan peer } 298852616f2bSIlan Peer 298905050753SIlan peer spin_unlock(®_indoor_lock); 299005050753SIlan peer 299105050753SIlan peer if (!is_indoor) 299205050753SIlan peer reg_check_channels(); 299352616f2bSIlan Peer 299452616f2bSIlan Peer return 0; 299552616f2bSIlan Peer } 299652616f2bSIlan Peer 299705050753SIlan peer void regulatory_netlink_notify(u32 portid) 299805050753SIlan peer { 299905050753SIlan peer spin_lock(®_indoor_lock); 300005050753SIlan peer 300105050753SIlan peer if (reg_is_indoor_portid != portid) { 300205050753SIlan peer spin_unlock(®_indoor_lock); 300305050753SIlan peer return; 300405050753SIlan peer } 300505050753SIlan peer 300605050753SIlan peer reg_is_indoor = false; 300705050753SIlan peer reg_is_indoor_portid = 0; 300805050753SIlan peer 300905050753SIlan peer spin_unlock(®_indoor_lock); 301005050753SIlan peer 301105050753SIlan peer reg_check_channels(); 301205050753SIlan peer } 301305050753SIlan peer 3014fe33eb39SLuis R. Rodriguez /* Driver hints */ 3015fe33eb39SLuis R. Rodriguez int regulatory_hint(struct wiphy *wiphy, const char *alpha2) 3016fe33eb39SLuis R. Rodriguez { 3017fe33eb39SLuis R. Rodriguez struct regulatory_request *request; 3018fe33eb39SLuis R. Rodriguez 3019fdc9d7b2SJohannes Berg if (WARN_ON(!alpha2 || !wiphy)) 3020fdc9d7b2SJohannes Berg return -EINVAL; 3021fe33eb39SLuis R. Rodriguez 30224f7b9140SLuis R. Rodriguez wiphy->regulatory_flags &= ~REGULATORY_CUSTOM_REG; 30234f7b9140SLuis R. Rodriguez 3024fe33eb39SLuis R. Rodriguez request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); 3025fe33eb39SLuis R. Rodriguez if (!request) 3026fe33eb39SLuis R. Rodriguez return -ENOMEM; 3027fe33eb39SLuis R. Rodriguez 3028fe33eb39SLuis R. Rodriguez request->wiphy_idx = get_wiphy_idx(wiphy); 3029fe33eb39SLuis R. Rodriguez 3030fe33eb39SLuis R. Rodriguez request->alpha2[0] = alpha2[0]; 3031fe33eb39SLuis R. Rodriguez request->alpha2[1] = alpha2[1]; 30327db90f4aSLuis R. Rodriguez request->initiator = NL80211_REGDOM_SET_BY_DRIVER; 3033fe33eb39SLuis R. Rodriguez 3034c37722bdSIlan peer /* Allow calling CRDA again */ 3035b6863036SJohannes Berg reset_crda_timeouts(); 3036c37722bdSIlan peer 3037fe33eb39SLuis R. Rodriguez queue_regulatory_request(request); 3038fe33eb39SLuis R. Rodriguez 3039fe33eb39SLuis R. Rodriguez return 0; 3040b2e1b302SLuis R. Rodriguez } 3041b2e1b302SLuis R. Rodriguez EXPORT_SYMBOL(regulatory_hint); 3042b2e1b302SLuis R. Rodriguez 304357fbcce3SJohannes Berg void regulatory_hint_country_ie(struct wiphy *wiphy, enum nl80211_band band, 30441a919318SJohannes Berg const u8 *country_ie, u8 country_ie_len) 30453f2355cbSLuis R. Rodriguez { 30463f2355cbSLuis R. Rodriguez char alpha2[2]; 30473f2355cbSLuis R. Rodriguez enum environment_cap env = ENVIRON_ANY; 3048db2424c5SJohannes Berg struct regulatory_request *request = NULL, *lr; 3049d335fe63SLuis R. Rodriguez 30503f2355cbSLuis R. Rodriguez /* IE len must be evenly divisible by 2 */ 30513f2355cbSLuis R. Rodriguez if (country_ie_len & 0x01) 3052db2424c5SJohannes Berg return; 30533f2355cbSLuis R. Rodriguez 30543f2355cbSLuis R. Rodriguez if (country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN) 3055db2424c5SJohannes Berg return; 3056db2424c5SJohannes Berg 3057db2424c5SJohannes Berg request = kzalloc(sizeof(*request), GFP_KERNEL); 3058db2424c5SJohannes Berg if (!request) 3059db2424c5SJohannes Berg return; 30603f2355cbSLuis R. Rodriguez 30613f2355cbSLuis R. Rodriguez alpha2[0] = country_ie[0]; 30623f2355cbSLuis R. Rodriguez alpha2[1] = country_ie[1]; 30633f2355cbSLuis R. Rodriguez 30643f2355cbSLuis R. Rodriguez if (country_ie[2] == 'I') 30653f2355cbSLuis R. Rodriguez env = ENVIRON_INDOOR; 30663f2355cbSLuis R. Rodriguez else if (country_ie[2] == 'O') 30673f2355cbSLuis R. Rodriguez env = ENVIRON_OUTDOOR; 30683f2355cbSLuis R. Rodriguez 3069db2424c5SJohannes Berg rcu_read_lock(); 3070db2424c5SJohannes Berg lr = get_last_request(); 3071db2424c5SJohannes Berg 3072db2424c5SJohannes Berg if (unlikely(!lr)) 3073db2424c5SJohannes Berg goto out; 3074db2424c5SJohannes Berg 3075fb1fc7adSLuis R. Rodriguez /* 30768b19e6caSLuis R. Rodriguez * We will run this only upon a successful connection on cfg80211. 30774b44c8bcSLuis R. Rodriguez * We leave conflict resolution to the workqueue, where can hold 30785fe231e8SJohannes Berg * the RTNL. 3079fb1fc7adSLuis R. Rodriguez */ 3080c492db37SJohannes Berg if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE && 3081c492db37SJohannes Berg lr->wiphy_idx != WIPHY_IDX_INVALID) 30823f2355cbSLuis R. Rodriguez goto out; 30833f2355cbSLuis R. Rodriguez 3084fe33eb39SLuis R. Rodriguez request->wiphy_idx = get_wiphy_idx(wiphy); 30854f366c5dSJohn W. Linville request->alpha2[0] = alpha2[0]; 30864f366c5dSJohn W. Linville request->alpha2[1] = alpha2[1]; 30877db90f4aSLuis R. Rodriguez request->initiator = NL80211_REGDOM_SET_BY_COUNTRY_IE; 3088fe33eb39SLuis R. Rodriguez request->country_ie_env = env; 30893f2355cbSLuis R. Rodriguez 3090c37722bdSIlan peer /* Allow calling CRDA again */ 3091b6863036SJohannes Berg reset_crda_timeouts(); 3092c37722bdSIlan peer 3093fe33eb39SLuis R. Rodriguez queue_regulatory_request(request); 3094db2424c5SJohannes Berg request = NULL; 30953f2355cbSLuis R. Rodriguez out: 3096db2424c5SJohannes Berg kfree(request); 3097db2424c5SJohannes Berg rcu_read_unlock(); 30983f2355cbSLuis R. Rodriguez } 3099b2e1b302SLuis R. Rodriguez 310009d989d1SLuis R. Rodriguez static void restore_alpha2(char *alpha2, bool reset_user) 310109d989d1SLuis R. Rodriguez { 310209d989d1SLuis R. Rodriguez /* indicates there is no alpha2 to consider for restoration */ 310309d989d1SLuis R. Rodriguez alpha2[0] = '9'; 310409d989d1SLuis R. Rodriguez alpha2[1] = '7'; 310509d989d1SLuis R. Rodriguez 310609d989d1SLuis R. Rodriguez /* The user setting has precedence over the module parameter */ 310709d989d1SLuis R. Rodriguez if (is_user_regdom_saved()) { 310809d989d1SLuis R. Rodriguez /* Unless we're asked to ignore it and reset it */ 310909d989d1SLuis R. Rodriguez if (reset_user) { 3110c799ba6eSJohannes Berg pr_debug("Restoring regulatory settings including user preference\n"); 311109d989d1SLuis R. Rodriguez user_alpha2[0] = '9'; 311209d989d1SLuis R. Rodriguez user_alpha2[1] = '7'; 311309d989d1SLuis R. Rodriguez 311409d989d1SLuis R. Rodriguez /* 311509d989d1SLuis R. Rodriguez * If we're ignoring user settings, we still need to 311609d989d1SLuis R. Rodriguez * check the module parameter to ensure we put things 311709d989d1SLuis R. Rodriguez * back as they were for a full restore. 311809d989d1SLuis R. Rodriguez */ 311909d989d1SLuis R. Rodriguez if (!is_world_regdom(ieee80211_regdom)) { 3120c799ba6eSJohannes Berg pr_debug("Keeping preference on module parameter ieee80211_regdom: %c%c\n", 31211a919318SJohannes Berg ieee80211_regdom[0], ieee80211_regdom[1]); 312209d989d1SLuis R. Rodriguez alpha2[0] = ieee80211_regdom[0]; 312309d989d1SLuis R. Rodriguez alpha2[1] = ieee80211_regdom[1]; 312409d989d1SLuis R. Rodriguez } 312509d989d1SLuis R. Rodriguez } else { 3126c799ba6eSJohannes Berg pr_debug("Restoring regulatory settings while preserving user preference for: %c%c\n", 31271a919318SJohannes Berg user_alpha2[0], user_alpha2[1]); 312809d989d1SLuis R. Rodriguez alpha2[0] = user_alpha2[0]; 312909d989d1SLuis R. Rodriguez alpha2[1] = user_alpha2[1]; 313009d989d1SLuis R. Rodriguez } 313109d989d1SLuis R. Rodriguez } else if (!is_world_regdom(ieee80211_regdom)) { 3132c799ba6eSJohannes Berg pr_debug("Keeping preference on module parameter ieee80211_regdom: %c%c\n", 31331a919318SJohannes Berg ieee80211_regdom[0], ieee80211_regdom[1]); 313409d989d1SLuis R. Rodriguez alpha2[0] = ieee80211_regdom[0]; 313509d989d1SLuis R. Rodriguez alpha2[1] = ieee80211_regdom[1]; 313609d989d1SLuis R. Rodriguez } else 3137c799ba6eSJohannes Berg pr_debug("Restoring regulatory settings\n"); 313809d989d1SLuis R. Rodriguez } 313909d989d1SLuis R. Rodriguez 31405ce543d1SRajkumar Manoharan static void restore_custom_reg_settings(struct wiphy *wiphy) 31415ce543d1SRajkumar Manoharan { 31425ce543d1SRajkumar Manoharan struct ieee80211_supported_band *sband; 314357fbcce3SJohannes Berg enum nl80211_band band; 31445ce543d1SRajkumar Manoharan struct ieee80211_channel *chan; 31455ce543d1SRajkumar Manoharan int i; 31465ce543d1SRajkumar Manoharan 314757fbcce3SJohannes Berg for (band = 0; band < NUM_NL80211_BANDS; band++) { 31485ce543d1SRajkumar Manoharan sband = wiphy->bands[band]; 31495ce543d1SRajkumar Manoharan if (!sband) 31505ce543d1SRajkumar Manoharan continue; 31515ce543d1SRajkumar Manoharan for (i = 0; i < sband->n_channels; i++) { 31525ce543d1SRajkumar Manoharan chan = &sband->channels[i]; 31535ce543d1SRajkumar Manoharan chan->flags = chan->orig_flags; 31545ce543d1SRajkumar Manoharan chan->max_antenna_gain = chan->orig_mag; 31555ce543d1SRajkumar Manoharan chan->max_power = chan->orig_mpwr; 3156899852afSPaul Stewart chan->beacon_found = false; 31575ce543d1SRajkumar Manoharan } 31585ce543d1SRajkumar Manoharan } 31595ce543d1SRajkumar Manoharan } 31605ce543d1SRajkumar Manoharan 316109d989d1SLuis R. Rodriguez /* 316209d989d1SLuis R. Rodriguez * Restoring regulatory settings involves ingoring any 316309d989d1SLuis R. Rodriguez * possibly stale country IE information and user regulatory 316409d989d1SLuis R. Rodriguez * settings if so desired, this includes any beacon hints 316509d989d1SLuis R. Rodriguez * learned as we could have traveled outside to another country 316609d989d1SLuis R. Rodriguez * after disconnection. To restore regulatory settings we do 316709d989d1SLuis R. Rodriguez * exactly what we did at bootup: 316809d989d1SLuis R. Rodriguez * 316909d989d1SLuis R. Rodriguez * - send a core regulatory hint 317009d989d1SLuis R. Rodriguez * - send a user regulatory hint if applicable 317109d989d1SLuis R. Rodriguez * 317209d989d1SLuis R. Rodriguez * Device drivers that send a regulatory hint for a specific country 317309d989d1SLuis R. Rodriguez * keep their own regulatory domain on wiphy->regd so that does does 317409d989d1SLuis R. Rodriguez * not need to be remembered. 317509d989d1SLuis R. Rodriguez */ 3176e646a025SJohannes Berg static void restore_regulatory_settings(bool reset_user, bool cached) 317709d989d1SLuis R. Rodriguez { 317809d989d1SLuis R. Rodriguez char alpha2[2]; 3179cee0bec5SDmitry Shmidt char world_alpha2[2]; 318009d989d1SLuis R. Rodriguez struct reg_beacon *reg_beacon, *btmp; 318114609555SLuis R. Rodriguez LIST_HEAD(tmp_reg_req_list); 31825ce543d1SRajkumar Manoharan struct cfg80211_registered_device *rdev; 318309d989d1SLuis R. Rodriguez 31845fe231e8SJohannes Berg ASSERT_RTNL(); 31855fe231e8SJohannes Berg 318605050753SIlan peer /* 318705050753SIlan peer * Clear the indoor setting in case that it is not controlled by user 318805050753SIlan peer * space, as otherwise there is no guarantee that the device is still 318905050753SIlan peer * operating in an indoor environment. 319005050753SIlan peer */ 319105050753SIlan peer spin_lock(®_indoor_lock); 319205050753SIlan peer if (reg_is_indoor && !reg_is_indoor_portid) { 319352616f2bSIlan Peer reg_is_indoor = false; 319405050753SIlan peer reg_check_channels(); 319505050753SIlan peer } 319605050753SIlan peer spin_unlock(®_indoor_lock); 319752616f2bSIlan Peer 31982d319867SJohannes Berg reset_regdomains(true, &world_regdom); 319909d989d1SLuis R. Rodriguez restore_alpha2(alpha2, reset_user); 320009d989d1SLuis R. Rodriguez 320114609555SLuis R. Rodriguez /* 320214609555SLuis R. Rodriguez * If there's any pending requests we simply 320314609555SLuis R. Rodriguez * stash them to a temporary pending queue and 320414609555SLuis R. Rodriguez * add then after we've restored regulatory 320514609555SLuis R. Rodriguez * settings. 320614609555SLuis R. Rodriguez */ 320714609555SLuis R. Rodriguez spin_lock(®_requests_lock); 3208eeca9fceSIlan peer list_splice_tail_init(®_requests_list, &tmp_reg_req_list); 320914609555SLuis R. Rodriguez spin_unlock(®_requests_lock); 321014609555SLuis R. Rodriguez 321109d989d1SLuis R. Rodriguez /* Clear beacon hints */ 321209d989d1SLuis R. Rodriguez spin_lock_bh(®_pending_beacons_lock); 3213fea9bcedSJohannes Berg list_for_each_entry_safe(reg_beacon, btmp, ®_pending_beacons, list) { 321409d989d1SLuis R. Rodriguez list_del(®_beacon->list); 321509d989d1SLuis R. Rodriguez kfree(reg_beacon); 321609d989d1SLuis R. Rodriguez } 321709d989d1SLuis R. Rodriguez spin_unlock_bh(®_pending_beacons_lock); 321809d989d1SLuis R. Rodriguez 3219fea9bcedSJohannes Berg list_for_each_entry_safe(reg_beacon, btmp, ®_beacon_list, list) { 322009d989d1SLuis R. Rodriguez list_del(®_beacon->list); 322109d989d1SLuis R. Rodriguez kfree(reg_beacon); 322209d989d1SLuis R. Rodriguez } 322309d989d1SLuis R. Rodriguez 322409d989d1SLuis R. Rodriguez /* First restore to the basic regulatory settings */ 3225379b82f4SJohannes Berg world_alpha2[0] = cfg80211_world_regdom->alpha2[0]; 3226379b82f4SJohannes Berg world_alpha2[1] = cfg80211_world_regdom->alpha2[1]; 322709d989d1SLuis R. Rodriguez 32285ce543d1SRajkumar Manoharan list_for_each_entry(rdev, &cfg80211_rdev_list, list) { 3229b0d7aa59SJonathan Doron if (rdev->wiphy.regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) 3230b0d7aa59SJonathan Doron continue; 3231a2f73b6cSLuis R. Rodriguez if (rdev->wiphy.regulatory_flags & REGULATORY_CUSTOM_REG) 32325ce543d1SRajkumar Manoharan restore_custom_reg_settings(&rdev->wiphy); 32335ce543d1SRajkumar Manoharan } 32345ce543d1SRajkumar Manoharan 3235e646a025SJohannes Berg if (cached && (!is_an_alpha2(alpha2) || 3236e646a025SJohannes Berg !IS_ERR_OR_NULL(cfg80211_user_regdom))) { 3237e646a025SJohannes Berg reset_regdomains(false, cfg80211_world_regdom); 3238e646a025SJohannes Berg update_all_wiphy_regulatory(NL80211_REGDOM_SET_BY_CORE); 3239e646a025SJohannes Berg print_regdomain(get_cfg80211_regdom()); 3240e646a025SJohannes Berg nl80211_send_reg_change_event(&core_request_world); 3241e646a025SJohannes Berg reg_set_request_processed(); 3242e646a025SJohannes Berg 3243e646a025SJohannes Berg if (is_an_alpha2(alpha2) && 3244e646a025SJohannes Berg !regulatory_hint_user(alpha2, NL80211_USER_REG_HINT_USER)) { 3245e646a025SJohannes Berg struct regulatory_request *ureq; 3246e646a025SJohannes Berg 3247e646a025SJohannes Berg spin_lock(®_requests_lock); 3248e646a025SJohannes Berg ureq = list_last_entry(®_requests_list, 3249e646a025SJohannes Berg struct regulatory_request, 3250e646a025SJohannes Berg list); 3251e646a025SJohannes Berg list_del(&ureq->list); 3252e646a025SJohannes Berg spin_unlock(®_requests_lock); 3253e646a025SJohannes Berg 3254e646a025SJohannes Berg notify_self_managed_wiphys(ureq); 3255e646a025SJohannes Berg reg_update_last_request(ureq); 3256e646a025SJohannes Berg set_regdom(reg_copy_regd(cfg80211_user_regdom), 3257e646a025SJohannes Berg REGD_SOURCE_CACHED); 3258e646a025SJohannes Berg } 3259e646a025SJohannes Berg } else { 3260cee0bec5SDmitry Shmidt regulatory_hint_core(world_alpha2); 326109d989d1SLuis R. Rodriguez 326209d989d1SLuis R. Rodriguez /* 326309d989d1SLuis R. Rodriguez * This restores the ieee80211_regdom module parameter 326409d989d1SLuis R. Rodriguez * preference or the last user requested regulatory 326509d989d1SLuis R. Rodriguez * settings, user regulatory settings takes precedence. 326609d989d1SLuis R. Rodriguez */ 326709d989d1SLuis R. Rodriguez if (is_an_alpha2(alpha2)) 3268549cc1c5SMaciej S. Szmigiero regulatory_hint_user(alpha2, NL80211_USER_REG_HINT_USER); 3269e646a025SJohannes Berg } 327009d989d1SLuis R. Rodriguez 327114609555SLuis R. Rodriguez spin_lock(®_requests_lock); 327211cff96cSJohannes Berg list_splice_tail_init(&tmp_reg_req_list, ®_requests_list); 327314609555SLuis R. Rodriguez spin_unlock(®_requests_lock); 327414609555SLuis R. Rodriguez 3275c799ba6eSJohannes Berg pr_debug("Kicking the queue\n"); 327614609555SLuis R. Rodriguez 327714609555SLuis R. Rodriguez schedule_work(®_work); 327814609555SLuis R. Rodriguez } 327909d989d1SLuis R. Rodriguez 32807417844bSRajeev Kumar Sirasanagandla static bool is_wiphy_all_set_reg_flag(enum ieee80211_regulatory_flags flag) 32817417844bSRajeev Kumar Sirasanagandla { 32827417844bSRajeev Kumar Sirasanagandla struct cfg80211_registered_device *rdev; 32837417844bSRajeev Kumar Sirasanagandla struct wireless_dev *wdev; 32847417844bSRajeev Kumar Sirasanagandla 32857417844bSRajeev Kumar Sirasanagandla list_for_each_entry(rdev, &cfg80211_rdev_list, list) { 32867417844bSRajeev Kumar Sirasanagandla list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) { 32877417844bSRajeev Kumar Sirasanagandla wdev_lock(wdev); 32887417844bSRajeev Kumar Sirasanagandla if (!(wdev->wiphy->regulatory_flags & flag)) { 32897417844bSRajeev Kumar Sirasanagandla wdev_unlock(wdev); 32907417844bSRajeev Kumar Sirasanagandla return false; 32917417844bSRajeev Kumar Sirasanagandla } 32927417844bSRajeev Kumar Sirasanagandla wdev_unlock(wdev); 32937417844bSRajeev Kumar Sirasanagandla } 32947417844bSRajeev Kumar Sirasanagandla } 32957417844bSRajeev Kumar Sirasanagandla 32967417844bSRajeev Kumar Sirasanagandla return true; 32977417844bSRajeev Kumar Sirasanagandla } 32987417844bSRajeev Kumar Sirasanagandla 329909d989d1SLuis R. Rodriguez void regulatory_hint_disconnect(void) 330009d989d1SLuis R. Rodriguez { 33017417844bSRajeev Kumar Sirasanagandla /* Restore of regulatory settings is not required when wiphy(s) 33027417844bSRajeev Kumar Sirasanagandla * ignore IE from connected access point but clearance of beacon hints 33037417844bSRajeev Kumar Sirasanagandla * is required when wiphy(s) supports beacon hints. 33047417844bSRajeev Kumar Sirasanagandla */ 33057417844bSRajeev Kumar Sirasanagandla if (is_wiphy_all_set_reg_flag(REGULATORY_COUNTRY_IE_IGNORE)) { 33067417844bSRajeev Kumar Sirasanagandla struct reg_beacon *reg_beacon, *btmp; 33077417844bSRajeev Kumar Sirasanagandla 33087417844bSRajeev Kumar Sirasanagandla if (is_wiphy_all_set_reg_flag(REGULATORY_DISABLE_BEACON_HINTS)) 33097417844bSRajeev Kumar Sirasanagandla return; 33107417844bSRajeev Kumar Sirasanagandla 33117417844bSRajeev Kumar Sirasanagandla spin_lock_bh(®_pending_beacons_lock); 33127417844bSRajeev Kumar Sirasanagandla list_for_each_entry_safe(reg_beacon, btmp, 33137417844bSRajeev Kumar Sirasanagandla ®_pending_beacons, list) { 33147417844bSRajeev Kumar Sirasanagandla list_del(®_beacon->list); 33157417844bSRajeev Kumar Sirasanagandla kfree(reg_beacon); 33167417844bSRajeev Kumar Sirasanagandla } 33177417844bSRajeev Kumar Sirasanagandla spin_unlock_bh(®_pending_beacons_lock); 33187417844bSRajeev Kumar Sirasanagandla 33197417844bSRajeev Kumar Sirasanagandla list_for_each_entry_safe(reg_beacon, btmp, 33207417844bSRajeev Kumar Sirasanagandla ®_beacon_list, list) { 33217417844bSRajeev Kumar Sirasanagandla list_del(®_beacon->list); 33227417844bSRajeev Kumar Sirasanagandla kfree(reg_beacon); 33237417844bSRajeev Kumar Sirasanagandla } 33247417844bSRajeev Kumar Sirasanagandla 33257417844bSRajeev Kumar Sirasanagandla return; 33267417844bSRajeev Kumar Sirasanagandla } 33277417844bSRajeev Kumar Sirasanagandla 3328c799ba6eSJohannes Berg pr_debug("All devices are disconnected, going to restore regulatory settings\n"); 3329e646a025SJohannes Berg restore_regulatory_settings(false, true); 333009d989d1SLuis R. Rodriguez } 333109d989d1SLuis R. Rodriguez 33329cf0a0b4SAlexei Avshalom Lazar static bool freq_is_chan_12_13_14(u32 freq) 3333e38f8a7aSLuis R. Rodriguez { 333457fbcce3SJohannes Berg if (freq == ieee80211_channel_to_frequency(12, NL80211_BAND_2GHZ) || 333557fbcce3SJohannes Berg freq == ieee80211_channel_to_frequency(13, NL80211_BAND_2GHZ) || 333657fbcce3SJohannes Berg freq == ieee80211_channel_to_frequency(14, NL80211_BAND_2GHZ)) 3337e38f8a7aSLuis R. Rodriguez return true; 3338e38f8a7aSLuis R. Rodriguez return false; 3339e38f8a7aSLuis R. Rodriguez } 3340e38f8a7aSLuis R. Rodriguez 33413ebfa6e7SLuis R. Rodriguez static bool pending_reg_beacon(struct ieee80211_channel *beacon_chan) 33423ebfa6e7SLuis R. Rodriguez { 33433ebfa6e7SLuis R. Rodriguez struct reg_beacon *pending_beacon; 33443ebfa6e7SLuis R. Rodriguez 33453ebfa6e7SLuis R. Rodriguez list_for_each_entry(pending_beacon, ®_pending_beacons, list) 3346934f4c7dSThomas Pedersen if (ieee80211_channel_equal(beacon_chan, 3347934f4c7dSThomas Pedersen &pending_beacon->chan)) 33483ebfa6e7SLuis R. Rodriguez return true; 33493ebfa6e7SLuis R. Rodriguez return false; 33503ebfa6e7SLuis R. Rodriguez } 33513ebfa6e7SLuis R. Rodriguez 3352e38f8a7aSLuis R. Rodriguez int regulatory_hint_found_beacon(struct wiphy *wiphy, 3353e38f8a7aSLuis R. Rodriguez struct ieee80211_channel *beacon_chan, 3354e38f8a7aSLuis R. Rodriguez gfp_t gfp) 3355e38f8a7aSLuis R. Rodriguez { 3356e38f8a7aSLuis R. Rodriguez struct reg_beacon *reg_beacon; 33573ebfa6e7SLuis R. Rodriguez bool processing; 3358e38f8a7aSLuis R. Rodriguez 33591a919318SJohannes Berg if (beacon_chan->beacon_found || 33601a919318SJohannes Berg beacon_chan->flags & IEEE80211_CHAN_RADAR || 336157fbcce3SJohannes Berg (beacon_chan->band == NL80211_BAND_2GHZ && 33621a919318SJohannes Berg !freq_is_chan_12_13_14(beacon_chan->center_freq))) 3363e38f8a7aSLuis R. Rodriguez return 0; 3364e38f8a7aSLuis R. Rodriguez 33653ebfa6e7SLuis R. Rodriguez spin_lock_bh(®_pending_beacons_lock); 33663ebfa6e7SLuis R. Rodriguez processing = pending_reg_beacon(beacon_chan); 33673ebfa6e7SLuis R. Rodriguez spin_unlock_bh(®_pending_beacons_lock); 33683ebfa6e7SLuis R. Rodriguez 33693ebfa6e7SLuis R. Rodriguez if (processing) 3370e38f8a7aSLuis R. Rodriguez return 0; 3371e38f8a7aSLuis R. Rodriguez 3372e38f8a7aSLuis R. Rodriguez reg_beacon = kzalloc(sizeof(struct reg_beacon), gfp); 3373e38f8a7aSLuis R. Rodriguez if (!reg_beacon) 3374e38f8a7aSLuis R. Rodriguez return -ENOMEM; 3375e38f8a7aSLuis R. Rodriguez 3376934f4c7dSThomas Pedersen pr_debug("Found new beacon on frequency: %d.%03d MHz (Ch %d) on %s\n", 3377934f4c7dSThomas Pedersen beacon_chan->center_freq, beacon_chan->freq_offset, 3378934f4c7dSThomas Pedersen ieee80211_freq_khz_to_channel( 3379934f4c7dSThomas Pedersen ieee80211_channel_to_khz(beacon_chan)), 3380e38f8a7aSLuis R. Rodriguez wiphy_name(wiphy)); 33814113f751SLuis R. Rodriguez 3382e38f8a7aSLuis R. Rodriguez memcpy(®_beacon->chan, beacon_chan, 3383e38f8a7aSLuis R. Rodriguez sizeof(struct ieee80211_channel)); 3384e38f8a7aSLuis R. Rodriguez 3385e38f8a7aSLuis R. Rodriguez /* 3386e38f8a7aSLuis R. Rodriguez * Since we can be called from BH or and non-BH context 3387e38f8a7aSLuis R. Rodriguez * we must use spin_lock_bh() 3388e38f8a7aSLuis R. Rodriguez */ 3389e38f8a7aSLuis R. Rodriguez spin_lock_bh(®_pending_beacons_lock); 3390e38f8a7aSLuis R. Rodriguez list_add_tail(®_beacon->list, ®_pending_beacons); 3391e38f8a7aSLuis R. Rodriguez spin_unlock_bh(®_pending_beacons_lock); 3392e38f8a7aSLuis R. Rodriguez 3393e38f8a7aSLuis R. Rodriguez schedule_work(®_work); 3394e38f8a7aSLuis R. Rodriguez 3395e38f8a7aSLuis R. Rodriguez return 0; 3396e38f8a7aSLuis R. Rodriguez } 3397e38f8a7aSLuis R. Rodriguez 3398a3d2eaf0SJohannes Berg static void print_rd_rules(const struct ieee80211_regdomain *rd) 3399b2e1b302SLuis R. Rodriguez { 3400b2e1b302SLuis R. Rodriguez unsigned int i; 3401a3d2eaf0SJohannes Berg const struct ieee80211_reg_rule *reg_rule = NULL; 3402a3d2eaf0SJohannes Berg const struct ieee80211_freq_range *freq_range = NULL; 3403a3d2eaf0SJohannes Berg const struct ieee80211_power_rule *power_rule = NULL; 3404089027e5SJanusz Dziedzic char bw[32], cac_time[32]; 3405b2e1b302SLuis R. Rodriguez 340694c4fd64SDave Young pr_debug(" (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp), (dfs_cac_time)\n"); 3407b2e1b302SLuis R. Rodriguez 3408b2e1b302SLuis R. Rodriguez for (i = 0; i < rd->n_reg_rules; i++) { 3409b2e1b302SLuis R. Rodriguez reg_rule = &rd->reg_rules[i]; 3410b2e1b302SLuis R. Rodriguez freq_range = ®_rule->freq_range; 3411b2e1b302SLuis R. Rodriguez power_rule = ®_rule->power_rule; 3412b2e1b302SLuis R. Rodriguez 3413b0dfd2eaSJanusz Dziedzic if (reg_rule->flags & NL80211_RRF_AUTO_BW) 3414b0dfd2eaSJanusz Dziedzic snprintf(bw, sizeof(bw), "%d KHz, %d KHz AUTO", 3415b0dfd2eaSJanusz Dziedzic freq_range->max_bandwidth_khz, 341697524820SJanusz Dziedzic reg_get_max_bandwidth(rd, reg_rule)); 341797524820SJanusz Dziedzic else 3418b0dfd2eaSJanusz Dziedzic snprintf(bw, sizeof(bw), "%d KHz", 341997524820SJanusz Dziedzic freq_range->max_bandwidth_khz); 342097524820SJanusz Dziedzic 3421089027e5SJanusz Dziedzic if (reg_rule->flags & NL80211_RRF_DFS) 3422089027e5SJanusz Dziedzic scnprintf(cac_time, sizeof(cac_time), "%u s", 3423089027e5SJanusz Dziedzic reg_rule->dfs_cac_ms/1000); 3424089027e5SJanusz Dziedzic else 3425089027e5SJanusz Dziedzic scnprintf(cac_time, sizeof(cac_time), "N/A"); 3426089027e5SJanusz Dziedzic 3427089027e5SJanusz Dziedzic 3428fb1fc7adSLuis R. Rodriguez /* 3429fb1fc7adSLuis R. Rodriguez * There may not be documentation for max antenna gain 3430fb1fc7adSLuis R. Rodriguez * in certain regions 3431fb1fc7adSLuis R. Rodriguez */ 3432b2e1b302SLuis R. Rodriguez if (power_rule->max_antenna_gain) 343394c4fd64SDave Young pr_debug(" (%d KHz - %d KHz @ %s), (%d mBi, %d mBm), (%s)\n", 3434b2e1b302SLuis R. Rodriguez freq_range->start_freq_khz, 3435b2e1b302SLuis R. Rodriguez freq_range->end_freq_khz, 343697524820SJanusz Dziedzic bw, 3437b2e1b302SLuis R. Rodriguez power_rule->max_antenna_gain, 3438089027e5SJanusz Dziedzic power_rule->max_eirp, 3439089027e5SJanusz Dziedzic cac_time); 3440b2e1b302SLuis R. Rodriguez else 344194c4fd64SDave Young pr_debug(" (%d KHz - %d KHz @ %s), (N/A, %d mBm), (%s)\n", 3442b2e1b302SLuis R. Rodriguez freq_range->start_freq_khz, 3443b2e1b302SLuis R. Rodriguez freq_range->end_freq_khz, 344497524820SJanusz Dziedzic bw, 3445089027e5SJanusz Dziedzic power_rule->max_eirp, 3446089027e5SJanusz Dziedzic cac_time); 3447b2e1b302SLuis R. Rodriguez } 3448b2e1b302SLuis R. Rodriguez } 3449b2e1b302SLuis R. Rodriguez 34504c7d3982SLuis R. Rodriguez bool reg_supported_dfs_region(enum nl80211_dfs_regions dfs_region) 34518b60b078SLuis R. Rodriguez { 34528b60b078SLuis R. Rodriguez switch (dfs_region) { 34538b60b078SLuis R. Rodriguez case NL80211_DFS_UNSET: 34548b60b078SLuis R. Rodriguez case NL80211_DFS_FCC: 34558b60b078SLuis R. Rodriguez case NL80211_DFS_ETSI: 34568b60b078SLuis R. Rodriguez case NL80211_DFS_JP: 34578b60b078SLuis R. Rodriguez return true; 34588b60b078SLuis R. Rodriguez default: 34594a22b00bSColin Ian King pr_debug("Ignoring unknown DFS master region: %d\n", dfs_region); 34608b60b078SLuis R. Rodriguez return false; 34618b60b078SLuis R. Rodriguez } 34628b60b078SLuis R. Rodriguez } 34638b60b078SLuis R. Rodriguez 3464a3d2eaf0SJohannes Berg static void print_regdomain(const struct ieee80211_regdomain *rd) 3465b2e1b302SLuis R. Rodriguez { 3466c492db37SJohannes Berg struct regulatory_request *lr = get_last_request(); 3467b2e1b302SLuis R. Rodriguez 34683f2355cbSLuis R. Rodriguez if (is_intersected_alpha2(rd->alpha2)) { 3469c492db37SJohannes Berg if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) { 347079c97e97SJohannes Berg struct cfg80211_registered_device *rdev; 3471c492db37SJohannes Berg rdev = cfg80211_rdev_by_wiphy_idx(lr->wiphy_idx); 347279c97e97SJohannes Berg if (rdev) { 347394c4fd64SDave Young pr_debug("Current regulatory domain updated by AP to: %c%c\n", 347479c97e97SJohannes Berg rdev->country_ie_alpha2[0], 347579c97e97SJohannes Berg rdev->country_ie_alpha2[1]); 34763f2355cbSLuis R. Rodriguez } else 347794c4fd64SDave Young pr_debug("Current regulatory domain intersected:\n"); 34783f2355cbSLuis R. Rodriguez } else 347994c4fd64SDave Young pr_debug("Current regulatory domain intersected:\n"); 34801a919318SJohannes Berg } else if (is_world_regdom(rd->alpha2)) { 348194c4fd64SDave Young pr_debug("World regulatory domain updated:\n"); 34821a919318SJohannes Berg } else { 3483b2e1b302SLuis R. Rodriguez if (is_unknown_alpha2(rd->alpha2)) 348494c4fd64SDave Young pr_debug("Regulatory domain changed to driver built-in settings (unknown country)\n"); 348557b5ce07SLuis R. Rodriguez else { 3486c492db37SJohannes Berg if (reg_request_cell_base(lr)) 348794c4fd64SDave Young pr_debug("Regulatory domain changed to country: %c%c by Cell Station\n", 3488b2e1b302SLuis R. Rodriguez rd->alpha2[0], rd->alpha2[1]); 348957b5ce07SLuis R. Rodriguez else 349094c4fd64SDave Young pr_debug("Regulatory domain changed to country: %c%c\n", 349157b5ce07SLuis R. Rodriguez rd->alpha2[0], rd->alpha2[1]); 349257b5ce07SLuis R. Rodriguez } 3493b2e1b302SLuis R. Rodriguez } 34941a919318SJohannes Berg 349594c4fd64SDave Young pr_debug(" DFS Master region: %s", reg_dfs_region_str(rd->dfs_region)); 3496b2e1b302SLuis R. Rodriguez print_rd_rules(rd); 3497b2e1b302SLuis R. Rodriguez } 3498b2e1b302SLuis R. Rodriguez 34992df78167SJohannes Berg static void print_regdomain_info(const struct ieee80211_regdomain *rd) 3500b2e1b302SLuis R. Rodriguez { 350194c4fd64SDave Young pr_debug("Regulatory domain: %c%c\n", rd->alpha2[0], rd->alpha2[1]); 3502b2e1b302SLuis R. Rodriguez print_rd_rules(rd); 3503b2e1b302SLuis R. Rodriguez } 3504b2e1b302SLuis R. Rodriguez 35053b9e5acaSLuis R. Rodriguez static int reg_set_rd_core(const struct ieee80211_regdomain *rd) 35063b9e5acaSLuis R. Rodriguez { 35073b9e5acaSLuis R. Rodriguez if (!is_world_regdom(rd->alpha2)) 35083b9e5acaSLuis R. Rodriguez return -EINVAL; 35093b9e5acaSLuis R. Rodriguez update_world_regdomain(rd); 35103b9e5acaSLuis R. Rodriguez return 0; 35113b9e5acaSLuis R. Rodriguez } 35123b9e5acaSLuis R. Rodriguez 351384721d44SLuis R. Rodriguez static int reg_set_rd_user(const struct ieee80211_regdomain *rd, 351484721d44SLuis R. Rodriguez struct regulatory_request *user_request) 351584721d44SLuis R. Rodriguez { 351684721d44SLuis R. Rodriguez const struct ieee80211_regdomain *intersected_rd = NULL; 351784721d44SLuis R. Rodriguez 351884721d44SLuis R. Rodriguez if (!regdom_changes(rd->alpha2)) 351984721d44SLuis R. Rodriguez return -EALREADY; 352084721d44SLuis R. Rodriguez 352184721d44SLuis R. Rodriguez if (!is_valid_rd(rd)) { 352294c4fd64SDave Young pr_err("Invalid regulatory domain detected: %c%c\n", 352394c4fd64SDave Young rd->alpha2[0], rd->alpha2[1]); 352484721d44SLuis R. Rodriguez print_regdomain_info(rd); 352584721d44SLuis R. Rodriguez return -EINVAL; 352684721d44SLuis R. Rodriguez } 352784721d44SLuis R. Rodriguez 352884721d44SLuis R. Rodriguez if (!user_request->intersect) { 352984721d44SLuis R. Rodriguez reset_regdomains(false, rd); 353084721d44SLuis R. Rodriguez return 0; 353184721d44SLuis R. Rodriguez } 353284721d44SLuis R. Rodriguez 353384721d44SLuis R. Rodriguez intersected_rd = regdom_intersect(rd, get_cfg80211_regdom()); 353484721d44SLuis R. Rodriguez if (!intersected_rd) 353584721d44SLuis R. Rodriguez return -EINVAL; 353684721d44SLuis R. Rodriguez 353784721d44SLuis R. Rodriguez kfree(rd); 353884721d44SLuis R. Rodriguez rd = NULL; 353984721d44SLuis R. Rodriguez reset_regdomains(false, intersected_rd); 354084721d44SLuis R. Rodriguez 354184721d44SLuis R. Rodriguez return 0; 354284721d44SLuis R. Rodriguez } 354384721d44SLuis R. Rodriguez 3544f5fe3247SLuis R. Rodriguez static int reg_set_rd_driver(const struct ieee80211_regdomain *rd, 3545f5fe3247SLuis R. Rodriguez struct regulatory_request *driver_request) 3546b2e1b302SLuis R. Rodriguez { 3547e9763c3cSJohannes Berg const struct ieee80211_regdomain *regd; 35489c96477dSLuis R. Rodriguez const struct ieee80211_regdomain *intersected_rd = NULL; 3549f5fe3247SLuis R. Rodriguez const struct ieee80211_regdomain *tmp; 3550806a9e39SLuis R. Rodriguez struct wiphy *request_wiphy; 35516913b49aSJohannes Berg 3552f5fe3247SLuis R. Rodriguez if (is_world_regdom(rd->alpha2)) 3553b2e1b302SLuis R. Rodriguez return -EINVAL; 3554b2e1b302SLuis R. Rodriguez 3555baeb66feSJohn W. Linville if (!regdom_changes(rd->alpha2)) 355695908535SKalle Valo return -EALREADY; 3557b2e1b302SLuis R. Rodriguez 3558b2e1b302SLuis R. Rodriguez if (!is_valid_rd(rd)) { 355994c4fd64SDave Young pr_err("Invalid regulatory domain detected: %c%c\n", 356094c4fd64SDave Young rd->alpha2[0], rd->alpha2[1]); 3561b2e1b302SLuis R. Rodriguez print_regdomain_info(rd); 3562b2e1b302SLuis R. Rodriguez return -EINVAL; 3563b2e1b302SLuis R. Rodriguez } 3564b2e1b302SLuis R. Rodriguez 3565f5fe3247SLuis R. Rodriguez request_wiphy = wiphy_idx_to_wiphy(driver_request->wiphy_idx); 3566922ec58cSJohannes Berg if (!request_wiphy) 3567de3584bdSJohannes Berg return -ENODEV; 3568806a9e39SLuis R. Rodriguez 3569f5fe3247SLuis R. Rodriguez if (!driver_request->intersect) { 3570558f6d32SLuis R. Rodriguez if (request_wiphy->regd) 3571558f6d32SLuis R. Rodriguez return -EALREADY; 35723e0c3ff3SLuis R. Rodriguez 3573e9763c3cSJohannes Berg regd = reg_copy_regd(rd); 3574e9763c3cSJohannes Berg if (IS_ERR(regd)) 3575e9763c3cSJohannes Berg return PTR_ERR(regd); 35763e0c3ff3SLuis R. Rodriguez 3577458f4f9eSJohannes Berg rcu_assign_pointer(request_wiphy->regd, regd); 3578379b82f4SJohannes Berg reset_regdomains(false, rd); 3579b8295acdSLuis R. Rodriguez return 0; 3580b8295acdSLuis R. Rodriguez } 3581b8295acdSLuis R. Rodriguez 3582458f4f9eSJohannes Berg intersected_rd = regdom_intersect(rd, get_cfg80211_regdom()); 35839c96477dSLuis R. Rodriguez if (!intersected_rd) 35849c96477dSLuis R. Rodriguez return -EINVAL; 3585b8295acdSLuis R. Rodriguez 3586fb1fc7adSLuis R. Rodriguez /* 3587fb1fc7adSLuis R. Rodriguez * We can trash what CRDA provided now. 35883e0c3ff3SLuis R. Rodriguez * However if a driver requested this specific regulatory 3589fb1fc7adSLuis R. Rodriguez * domain we keep it for its private use 3590fb1fc7adSLuis R. Rodriguez */ 3591b7566fc3SLarry Finger tmp = get_wiphy_regdom(request_wiphy); 3592458f4f9eSJohannes Berg rcu_assign_pointer(request_wiphy->regd, rd); 3593b7566fc3SLarry Finger rcu_free_regdom(tmp); 35943e0c3ff3SLuis R. Rodriguez 3595b8295acdSLuis R. Rodriguez rd = NULL; 3596b8295acdSLuis R. Rodriguez 3597379b82f4SJohannes Berg reset_regdomains(false, intersected_rd); 3598b8295acdSLuis R. Rodriguez 3599b8295acdSLuis R. Rodriguez return 0; 36009c96477dSLuis R. Rodriguez } 36019c96477dSLuis R. Rodriguez 360201992406SLuis R. Rodriguez static int reg_set_rd_country_ie(const struct ieee80211_regdomain *rd, 360301992406SLuis R. Rodriguez struct regulatory_request *country_ie_request) 3604f5fe3247SLuis R. Rodriguez { 3605f5fe3247SLuis R. Rodriguez struct wiphy *request_wiphy; 3606f5fe3247SLuis R. Rodriguez 3607f5fe3247SLuis R. Rodriguez if (!is_alpha2_set(rd->alpha2) && !is_an_alpha2(rd->alpha2) && 3608f5fe3247SLuis R. Rodriguez !is_unknown_alpha2(rd->alpha2)) 3609f5fe3247SLuis R. Rodriguez return -EINVAL; 3610f5fe3247SLuis R. Rodriguez 3611f5fe3247SLuis R. Rodriguez /* 3612f5fe3247SLuis R. Rodriguez * Lets only bother proceeding on the same alpha2 if the current 3613f5fe3247SLuis R. Rodriguez * rd is non static (it means CRDA was present and was used last) 3614f5fe3247SLuis R. Rodriguez * and the pending request came in from a country IE 3615f5fe3247SLuis R. Rodriguez */ 3616f5fe3247SLuis R. Rodriguez 3617f5fe3247SLuis R. Rodriguez if (!is_valid_rd(rd)) { 361894c4fd64SDave Young pr_err("Invalid regulatory domain detected: %c%c\n", 361994c4fd64SDave Young rd->alpha2[0], rd->alpha2[1]); 3620f5fe3247SLuis R. Rodriguez print_regdomain_info(rd); 36213f2355cbSLuis R. Rodriguez return -EINVAL; 3622b2e1b302SLuis R. Rodriguez } 3623b2e1b302SLuis R. Rodriguez 362401992406SLuis R. Rodriguez request_wiphy = wiphy_idx_to_wiphy(country_ie_request->wiphy_idx); 3625922ec58cSJohannes Berg if (!request_wiphy) 3626f5fe3247SLuis R. Rodriguez return -ENODEV; 3627f5fe3247SLuis R. Rodriguez 362801992406SLuis R. Rodriguez if (country_ie_request->intersect) 3629f5fe3247SLuis R. Rodriguez return -EINVAL; 3630f5fe3247SLuis R. Rodriguez 3631f5fe3247SLuis R. Rodriguez reset_regdomains(false, rd); 3632f5fe3247SLuis R. Rodriguez return 0; 3633f5fe3247SLuis R. Rodriguez } 3634b2e1b302SLuis R. Rodriguez 3635fb1fc7adSLuis R. Rodriguez /* 3636fb1fc7adSLuis R. Rodriguez * Use this call to set the current regulatory domain. Conflicts with 3637b2e1b302SLuis R. Rodriguez * multiple drivers can be ironed out later. Caller must've already 3638458f4f9eSJohannes Berg * kmalloc'd the rd structure. 3639fb1fc7adSLuis R. Rodriguez */ 3640c37722bdSIlan peer int set_regdom(const struct ieee80211_regdomain *rd, 3641c37722bdSIlan peer enum ieee80211_regd_source regd_src) 3642b2e1b302SLuis R. Rodriguez { 3643c492db37SJohannes Berg struct regulatory_request *lr; 3644092008abSJanusz Dziedzic bool user_reset = false; 3645b2e1b302SLuis R. Rodriguez int r; 3646b2e1b302SLuis R. Rodriguez 3647e646a025SJohannes Berg if (IS_ERR_OR_NULL(rd)) 3648e646a025SJohannes Berg return -ENODATA; 3649e646a025SJohannes Berg 36503b9e5acaSLuis R. Rodriguez if (!reg_is_valid_request(rd->alpha2)) { 36513b9e5acaSLuis R. Rodriguez kfree(rd); 36523b9e5acaSLuis R. Rodriguez return -EINVAL; 36533b9e5acaSLuis R. Rodriguez } 36543b9e5acaSLuis R. Rodriguez 3655c37722bdSIlan peer if (regd_src == REGD_SOURCE_CRDA) 3656b6863036SJohannes Berg reset_crda_timeouts(); 3657c37722bdSIlan peer 3658c492db37SJohannes Berg lr = get_last_request(); 3659abc7381bSLuis R. Rodriguez 3660b2e1b302SLuis R. Rodriguez /* Note that this doesn't update the wiphys, this is done below */ 36613b9e5acaSLuis R. Rodriguez switch (lr->initiator) { 36623b9e5acaSLuis R. Rodriguez case NL80211_REGDOM_SET_BY_CORE: 36633b9e5acaSLuis R. Rodriguez r = reg_set_rd_core(rd); 36643b9e5acaSLuis R. Rodriguez break; 36653b9e5acaSLuis R. Rodriguez case NL80211_REGDOM_SET_BY_USER: 3666e646a025SJohannes Berg cfg80211_save_user_regdom(rd); 366784721d44SLuis R. Rodriguez r = reg_set_rd_user(rd, lr); 3668092008abSJanusz Dziedzic user_reset = true; 366984721d44SLuis R. Rodriguez break; 36703b9e5acaSLuis R. Rodriguez case NL80211_REGDOM_SET_BY_DRIVER: 3671f5fe3247SLuis R. Rodriguez r = reg_set_rd_driver(rd, lr); 3672f5fe3247SLuis R. Rodriguez break; 36733b9e5acaSLuis R. Rodriguez case NL80211_REGDOM_SET_BY_COUNTRY_IE: 367401992406SLuis R. Rodriguez r = reg_set_rd_country_ie(rd, lr); 36753b9e5acaSLuis R. Rodriguez break; 36763b9e5acaSLuis R. Rodriguez default: 36773b9e5acaSLuis R. Rodriguez WARN(1, "invalid initiator %d\n", lr->initiator); 367809d11800SOla Olsson kfree(rd); 36793b9e5acaSLuis R. Rodriguez return -EINVAL; 36803b9e5acaSLuis R. Rodriguez } 36813b9e5acaSLuis R. Rodriguez 3682d2372b31SJohannes Berg if (r) { 3683092008abSJanusz Dziedzic switch (r) { 3684092008abSJanusz Dziedzic case -EALREADY: 368595908535SKalle Valo reg_set_request_processed(); 3686092008abSJanusz Dziedzic break; 3687092008abSJanusz Dziedzic default: 3688092008abSJanusz Dziedzic /* Back to world regulatory in case of errors */ 3689e646a025SJohannes Berg restore_regulatory_settings(user_reset, false); 3690092008abSJanusz Dziedzic } 369195908535SKalle Valo 3692d2372b31SJohannes Berg kfree(rd); 369338fd2143SJohannes Berg return r; 3694d2372b31SJohannes Berg } 3695b2e1b302SLuis R. Rodriguez 3696b2e1b302SLuis R. Rodriguez /* This would make this whole thing pointless */ 369738fd2143SJohannes Berg if (WARN_ON(!lr->intersect && rd != get_cfg80211_regdom())) 369838fd2143SJohannes Berg return -EINVAL; 3699b2e1b302SLuis R. Rodriguez 3700b2e1b302SLuis R. Rodriguez /* update all wiphys now with the new established regulatory domain */ 3701c492db37SJohannes Berg update_all_wiphy_regulatory(lr->initiator); 3702b2e1b302SLuis R. Rodriguez 3703458f4f9eSJohannes Berg print_regdomain(get_cfg80211_regdom()); 3704b2e1b302SLuis R. Rodriguez 3705c492db37SJohannes Berg nl80211_send_reg_change_event(lr); 370673d54c9eSLuis R. Rodriguez 3707b2e253cfSLuis R. Rodriguez reg_set_request_processed(); 3708b2e253cfSLuis R. Rodriguez 370938fd2143SJohannes Berg return 0; 3710b2e1b302SLuis R. Rodriguez } 3711b2e1b302SLuis R. Rodriguez 37122c3e861cSArik Nemtsov static int __regulatory_set_wiphy_regd(struct wiphy *wiphy, 3713b0d7aa59SJonathan Doron struct ieee80211_regdomain *rd) 3714b0d7aa59SJonathan Doron { 3715b0d7aa59SJonathan Doron const struct ieee80211_regdomain *regd; 3716b0d7aa59SJonathan Doron const struct ieee80211_regdomain *prev_regd; 3717b0d7aa59SJonathan Doron struct cfg80211_registered_device *rdev; 3718b0d7aa59SJonathan Doron 3719b0d7aa59SJonathan Doron if (WARN_ON(!wiphy || !rd)) 3720b0d7aa59SJonathan Doron return -EINVAL; 3721b0d7aa59SJonathan Doron 3722b0d7aa59SJonathan Doron if (WARN(!(wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED), 3723b0d7aa59SJonathan Doron "wiphy should have REGULATORY_WIPHY_SELF_MANAGED\n")) 3724b0d7aa59SJonathan Doron return -EPERM; 3725b0d7aa59SJonathan Doron 3726b0d7aa59SJonathan Doron if (WARN(!is_valid_rd(rd), "Invalid regulatory domain detected\n")) { 3727b0d7aa59SJonathan Doron print_regdomain_info(rd); 3728b0d7aa59SJonathan Doron return -EINVAL; 3729b0d7aa59SJonathan Doron } 3730b0d7aa59SJonathan Doron 3731b0d7aa59SJonathan Doron regd = reg_copy_regd(rd); 3732b0d7aa59SJonathan Doron if (IS_ERR(regd)) 3733b0d7aa59SJonathan Doron return PTR_ERR(regd); 3734b0d7aa59SJonathan Doron 3735b0d7aa59SJonathan Doron rdev = wiphy_to_rdev(wiphy); 3736b0d7aa59SJonathan Doron 3737b0d7aa59SJonathan Doron spin_lock(®_requests_lock); 3738b0d7aa59SJonathan Doron prev_regd = rdev->requested_regd; 3739b0d7aa59SJonathan Doron rdev->requested_regd = regd; 3740b0d7aa59SJonathan Doron spin_unlock(®_requests_lock); 3741b0d7aa59SJonathan Doron 3742b0d7aa59SJonathan Doron kfree(prev_regd); 37432c3e861cSArik Nemtsov return 0; 37442c3e861cSArik Nemtsov } 37452c3e861cSArik Nemtsov 37462c3e861cSArik Nemtsov int regulatory_set_wiphy_regd(struct wiphy *wiphy, 37472c3e861cSArik Nemtsov struct ieee80211_regdomain *rd) 37482c3e861cSArik Nemtsov { 37492c3e861cSArik Nemtsov int ret = __regulatory_set_wiphy_regd(wiphy, rd); 37502c3e861cSArik Nemtsov 37512c3e861cSArik Nemtsov if (ret) 37522c3e861cSArik Nemtsov return ret; 3753b0d7aa59SJonathan Doron 3754b0d7aa59SJonathan Doron schedule_work(®_work); 3755b0d7aa59SJonathan Doron return 0; 3756b0d7aa59SJonathan Doron } 3757b0d7aa59SJonathan Doron EXPORT_SYMBOL(regulatory_set_wiphy_regd); 3758b0d7aa59SJonathan Doron 37592c3e861cSArik Nemtsov int regulatory_set_wiphy_regd_sync_rtnl(struct wiphy *wiphy, 37602c3e861cSArik Nemtsov struct ieee80211_regdomain *rd) 37612c3e861cSArik Nemtsov { 37622c3e861cSArik Nemtsov int ret; 37632c3e861cSArik Nemtsov 37642c3e861cSArik Nemtsov ASSERT_RTNL(); 37652c3e861cSArik Nemtsov 37662c3e861cSArik Nemtsov ret = __regulatory_set_wiphy_regd(wiphy, rd); 37672c3e861cSArik Nemtsov if (ret) 37682c3e861cSArik Nemtsov return ret; 37692c3e861cSArik Nemtsov 37702c3e861cSArik Nemtsov /* process the request immediately */ 37712c3e861cSArik Nemtsov reg_process_self_managed_hints(); 37722c3e861cSArik Nemtsov return 0; 37732c3e861cSArik Nemtsov } 37742c3e861cSArik Nemtsov EXPORT_SYMBOL(regulatory_set_wiphy_regd_sync_rtnl); 37752c3e861cSArik Nemtsov 377657b5ce07SLuis R. Rodriguez void wiphy_regulatory_register(struct wiphy *wiphy) 377757b5ce07SLuis R. Rodriguez { 3778aced43ceSAmar Singhal struct regulatory_request *lr = get_last_request(); 377923df0b73SArik Nemtsov 3780aced43ceSAmar Singhal /* self-managed devices ignore beacon hints and country IE */ 3781aced43ceSAmar Singhal if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) { 3782b0d7aa59SJonathan Doron wiphy->regulatory_flags |= REGULATORY_DISABLE_BEACON_HINTS | 3783b0d7aa59SJonathan Doron REGULATORY_COUNTRY_IE_IGNORE; 3784b0d7aa59SJonathan Doron 3785aced43ceSAmar Singhal /* 3786aced43ceSAmar Singhal * The last request may have been received before this 3787aced43ceSAmar Singhal * registration call. Call the driver notifier if 37888772eed9SSriram R * initiator is USER. 3789aced43ceSAmar Singhal */ 37908772eed9SSriram R if (lr->initiator == NL80211_REGDOM_SET_BY_USER) 3791aced43ceSAmar Singhal reg_call_notifier(wiphy, lr); 3792aced43ceSAmar Singhal } 3793aced43ceSAmar Singhal 379457b5ce07SLuis R. Rodriguez if (!reg_dev_ignore_cell_hint(wiphy)) 379557b5ce07SLuis R. Rodriguez reg_num_devs_support_basehint++; 379657b5ce07SLuis R. Rodriguez 379723df0b73SArik Nemtsov wiphy_update_regulatory(wiphy, lr->initiator); 379889766727SVasanthakumar Thiagarajan wiphy_all_share_dfs_chan_state(wiphy); 379957b5ce07SLuis R. Rodriguez } 380057b5ce07SLuis R. Rodriguez 3801bfead080SLuis R. Rodriguez void wiphy_regulatory_deregister(struct wiphy *wiphy) 38023f2355cbSLuis R. Rodriguez { 38030ad8acafSLuis R. Rodriguez struct wiphy *request_wiphy = NULL; 3804c492db37SJohannes Berg struct regulatory_request *lr; 3805761cf7ecSLuis R. Rodriguez 3806c492db37SJohannes Berg lr = get_last_request(); 3807abc7381bSLuis R. Rodriguez 380857b5ce07SLuis R. Rodriguez if (!reg_dev_ignore_cell_hint(wiphy)) 380957b5ce07SLuis R. Rodriguez reg_num_devs_support_basehint--; 381057b5ce07SLuis R. Rodriguez 3811458f4f9eSJohannes Berg rcu_free_regdom(get_wiphy_regdom(wiphy)); 381234dd886cSMonam Agarwal RCU_INIT_POINTER(wiphy->regd, NULL); 38130ef9ccddSChris Wright 3814c492db37SJohannes Berg if (lr) 3815c492db37SJohannes Berg request_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx); 3816806a9e39SLuis R. Rodriguez 38170ef9ccddSChris Wright if (!request_wiphy || request_wiphy != wiphy) 381838fd2143SJohannes Berg return; 38190ef9ccddSChris Wright 3820c492db37SJohannes Berg lr->wiphy_idx = WIPHY_IDX_INVALID; 3821c492db37SJohannes Berg lr->country_ie_env = ENVIRON_ANY; 38223f2355cbSLuis R. Rodriguez } 38233f2355cbSLuis R. Rodriguez 3824174e0cd2SIlan Peer /* 3825f89769cfSArend van Spriel * See FCC notices for UNII band definitions 3826f89769cfSArend van Spriel * 5GHz: https://www.fcc.gov/document/5-ghz-unlicensed-spectrum-unii 3827f89769cfSArend van Spriel * 6GHz: https://www.fcc.gov/document/fcc-proposes-more-spectrum-unlicensed-use-0 3828174e0cd2SIlan Peer */ 3829174e0cd2SIlan Peer int cfg80211_get_unii(int freq) 3830174e0cd2SIlan Peer { 3831174e0cd2SIlan Peer /* UNII-1 */ 3832174e0cd2SIlan Peer if (freq >= 5150 && freq <= 5250) 3833174e0cd2SIlan Peer return 0; 3834174e0cd2SIlan Peer 3835174e0cd2SIlan Peer /* UNII-2A */ 3836174e0cd2SIlan Peer if (freq > 5250 && freq <= 5350) 3837174e0cd2SIlan Peer return 1; 3838174e0cd2SIlan Peer 3839174e0cd2SIlan Peer /* UNII-2B */ 3840174e0cd2SIlan Peer if (freq > 5350 && freq <= 5470) 3841174e0cd2SIlan Peer return 2; 3842174e0cd2SIlan Peer 3843174e0cd2SIlan Peer /* UNII-2C */ 3844174e0cd2SIlan Peer if (freq > 5470 && freq <= 5725) 3845174e0cd2SIlan Peer return 3; 3846174e0cd2SIlan Peer 3847174e0cd2SIlan Peer /* UNII-3 */ 3848174e0cd2SIlan Peer if (freq > 5725 && freq <= 5825) 3849174e0cd2SIlan Peer return 4; 3850174e0cd2SIlan Peer 3851f89769cfSArend van Spriel /* UNII-5 */ 3852f89769cfSArend van Spriel if (freq > 5925 && freq <= 6425) 3853f89769cfSArend van Spriel return 5; 3854f89769cfSArend van Spriel 3855f89769cfSArend van Spriel /* UNII-6 */ 3856f89769cfSArend van Spriel if (freq > 6425 && freq <= 6525) 3857f89769cfSArend van Spriel return 6; 3858f89769cfSArend van Spriel 3859f89769cfSArend van Spriel /* UNII-7 */ 3860f89769cfSArend van Spriel if (freq > 6525 && freq <= 6875) 3861f89769cfSArend van Spriel return 7; 3862f89769cfSArend van Spriel 3863f89769cfSArend van Spriel /* UNII-8 */ 3864f89769cfSArend van Spriel if (freq > 6875 && freq <= 7125) 3865f89769cfSArend van Spriel return 8; 3866f89769cfSArend van Spriel 3867174e0cd2SIlan Peer return -EINVAL; 3868174e0cd2SIlan Peer } 3869174e0cd2SIlan Peer 3870c8866e55SIlan Peer bool regulatory_indoor_allowed(void) 3871c8866e55SIlan Peer { 3872c8866e55SIlan Peer return reg_is_indoor; 3873c8866e55SIlan Peer } 3874c8866e55SIlan Peer 3875b35a51c7SVasanthakumar Thiagarajan bool regulatory_pre_cac_allowed(struct wiphy *wiphy) 3876b35a51c7SVasanthakumar Thiagarajan { 3877b35a51c7SVasanthakumar Thiagarajan const struct ieee80211_regdomain *regd = NULL; 3878b35a51c7SVasanthakumar Thiagarajan const struct ieee80211_regdomain *wiphy_regd = NULL; 3879b35a51c7SVasanthakumar Thiagarajan bool pre_cac_allowed = false; 3880b35a51c7SVasanthakumar Thiagarajan 3881b35a51c7SVasanthakumar Thiagarajan rcu_read_lock(); 3882b35a51c7SVasanthakumar Thiagarajan 3883b35a51c7SVasanthakumar Thiagarajan regd = rcu_dereference(cfg80211_regdomain); 3884b35a51c7SVasanthakumar Thiagarajan wiphy_regd = rcu_dereference(wiphy->regd); 3885b35a51c7SVasanthakumar Thiagarajan if (!wiphy_regd) { 3886b35a51c7SVasanthakumar Thiagarajan if (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 } 3893b35a51c7SVasanthakumar Thiagarajan 3894b35a51c7SVasanthakumar Thiagarajan if (regd->dfs_region == wiphy_regd->dfs_region && 3895b35a51c7SVasanthakumar Thiagarajan wiphy_regd->dfs_region == NL80211_DFS_ETSI) 3896b35a51c7SVasanthakumar Thiagarajan pre_cac_allowed = true; 3897b35a51c7SVasanthakumar Thiagarajan 3898b35a51c7SVasanthakumar Thiagarajan rcu_read_unlock(); 3899b35a51c7SVasanthakumar Thiagarajan 3900b35a51c7SVasanthakumar Thiagarajan return pre_cac_allowed; 3901b35a51c7SVasanthakumar Thiagarajan } 3902dc0c18edSAaron Komisar EXPORT_SYMBOL(regulatory_pre_cac_allowed); 3903b35a51c7SVasanthakumar Thiagarajan 390426ec17a1SOrr Mazor static void cfg80211_check_and_end_cac(struct cfg80211_registered_device *rdev) 390526ec17a1SOrr Mazor { 390626ec17a1SOrr Mazor struct wireless_dev *wdev; 390726ec17a1SOrr Mazor /* If we finished CAC or received radar, we should end any 390826ec17a1SOrr Mazor * CAC running on the same channels. 390926ec17a1SOrr Mazor * the check !cfg80211_chandef_dfs_usable contain 2 options: 391026ec17a1SOrr Mazor * either all channels are available - those the CAC_FINISHED 391126ec17a1SOrr Mazor * event has effected another wdev state, or there is a channel 391226ec17a1SOrr Mazor * in unavailable state in wdev chandef - those the RADAR_DETECTED 391326ec17a1SOrr Mazor * event has effected another wdev state. 391426ec17a1SOrr Mazor * In both cases we should end the CAC on the wdev. 391526ec17a1SOrr Mazor */ 391626ec17a1SOrr Mazor list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) { 391726ec17a1SOrr Mazor if (wdev->cac_started && 391826ec17a1SOrr Mazor !cfg80211_chandef_dfs_usable(&rdev->wiphy, &wdev->chandef)) 391926ec17a1SOrr Mazor rdev_end_cac(rdev, wdev->netdev); 392026ec17a1SOrr Mazor } 392126ec17a1SOrr Mazor } 392226ec17a1SOrr Mazor 392389766727SVasanthakumar Thiagarajan void regulatory_propagate_dfs_state(struct wiphy *wiphy, 392489766727SVasanthakumar Thiagarajan struct cfg80211_chan_def *chandef, 392589766727SVasanthakumar Thiagarajan enum nl80211_dfs_state dfs_state, 392689766727SVasanthakumar Thiagarajan enum nl80211_radar_event event) 392789766727SVasanthakumar Thiagarajan { 392889766727SVasanthakumar Thiagarajan struct cfg80211_registered_device *rdev; 392989766727SVasanthakumar Thiagarajan 393089766727SVasanthakumar Thiagarajan ASSERT_RTNL(); 393189766727SVasanthakumar Thiagarajan 393289766727SVasanthakumar Thiagarajan if (WARN_ON(!cfg80211_chandef_valid(chandef))) 393389766727SVasanthakumar Thiagarajan return; 393489766727SVasanthakumar Thiagarajan 393589766727SVasanthakumar Thiagarajan list_for_each_entry(rdev, &cfg80211_rdev_list, list) { 393689766727SVasanthakumar Thiagarajan if (wiphy == &rdev->wiphy) 393789766727SVasanthakumar Thiagarajan continue; 393889766727SVasanthakumar Thiagarajan 393989766727SVasanthakumar Thiagarajan if (!reg_dfs_domain_same(wiphy, &rdev->wiphy)) 394089766727SVasanthakumar Thiagarajan continue; 394189766727SVasanthakumar Thiagarajan 394289766727SVasanthakumar Thiagarajan if (!ieee80211_get_channel(&rdev->wiphy, 394389766727SVasanthakumar Thiagarajan chandef->chan->center_freq)) 394489766727SVasanthakumar Thiagarajan continue; 394589766727SVasanthakumar Thiagarajan 394689766727SVasanthakumar Thiagarajan cfg80211_set_dfs_state(&rdev->wiphy, chandef, dfs_state); 394789766727SVasanthakumar Thiagarajan 394889766727SVasanthakumar Thiagarajan if (event == NL80211_RADAR_DETECTED || 394926ec17a1SOrr Mazor event == NL80211_RADAR_CAC_FINISHED) { 395089766727SVasanthakumar Thiagarajan cfg80211_sched_dfs_chan_update(rdev); 395126ec17a1SOrr Mazor cfg80211_check_and_end_cac(rdev); 395226ec17a1SOrr Mazor } 395389766727SVasanthakumar Thiagarajan 395489766727SVasanthakumar Thiagarajan nl80211_radar_notify(rdev, chandef, event, NULL, GFP_KERNEL); 395589766727SVasanthakumar Thiagarajan } 395689766727SVasanthakumar Thiagarajan } 395789766727SVasanthakumar Thiagarajan 3958d7be102fSJohannes Berg static int __init regulatory_init_db(void) 3959b2e1b302SLuis R. Rodriguez { 3960d7be102fSJohannes Berg int err; 3961734366deSJohannes Berg 396271e5e886SJohannes Berg /* 396371e5e886SJohannes Berg * It's possible that - due to other bugs/issues - cfg80211 396471e5e886SJohannes Berg * never called regulatory_init() below, or that it failed; 396571e5e886SJohannes Berg * in that case, don't try to do any further work here as 396671e5e886SJohannes Berg * it's doomed to lead to crashes. 396771e5e886SJohannes Berg */ 396871e5e886SJohannes Berg if (IS_ERR_OR_NULL(reg_pdev)) 396971e5e886SJohannes Berg return -EINVAL; 397071e5e886SJohannes Berg 397190a53e44SJohannes Berg err = load_builtin_regdb_keys(); 397290a53e44SJohannes Berg if (err) 397390a53e44SJohannes Berg return err; 397490a53e44SJohannes Berg 3975ae9e4b0dSLuis R. Rodriguez /* We always try to get an update for the static regdomain */ 3976458f4f9eSJohannes Berg err = regulatory_hint_core(cfg80211_world_regdom->alpha2); 3977bcf4f99bSLuis R. Rodriguez if (err) { 397809d11800SOla Olsson if (err == -ENOMEM) { 397909d11800SOla Olsson platform_device_unregister(reg_pdev); 3980bcf4f99bSLuis R. Rodriguez return err; 398109d11800SOla Olsson } 3982bcf4f99bSLuis R. Rodriguez /* 3983bcf4f99bSLuis R. Rodriguez * N.B. kobject_uevent_env() can fail mainly for when we're out 3984bcf4f99bSLuis R. Rodriguez * memory which is handled and propagated appropriately above 3985bcf4f99bSLuis R. Rodriguez * but it can also fail during a netlink_broadcast() or during 3986bcf4f99bSLuis R. Rodriguez * early boot for call_usermodehelper(). For now treat these 3987bcf4f99bSLuis R. Rodriguez * errors as non-fatal. 3988bcf4f99bSLuis R. Rodriguez */ 3989e9c0268fSJoe Perches pr_err("kobject_uevent_env() was unable to call CRDA during init\n"); 3990bcf4f99bSLuis R. Rodriguez } 3991734366deSJohannes Berg 3992ae9e4b0dSLuis R. Rodriguez /* 3993ae9e4b0dSLuis R. Rodriguez * Finally, if the user set the module parameter treat it 3994ae9e4b0dSLuis R. Rodriguez * as a user hint. 3995ae9e4b0dSLuis R. Rodriguez */ 3996ae9e4b0dSLuis R. Rodriguez if (!is_world_regdom(ieee80211_regdom)) 399757b5ce07SLuis R. Rodriguez regulatory_hint_user(ieee80211_regdom, 399857b5ce07SLuis R. Rodriguez NL80211_USER_REG_HINT_USER); 3999ae9e4b0dSLuis R. Rodriguez 4000b2e1b302SLuis R. Rodriguez return 0; 4001b2e1b302SLuis R. Rodriguez } 4002d7be102fSJohannes Berg #ifndef MODULE 4003d7be102fSJohannes Berg late_initcall(regulatory_init_db); 4004d7be102fSJohannes Berg #endif 4005d7be102fSJohannes Berg 4006d7be102fSJohannes Berg int __init regulatory_init(void) 4007d7be102fSJohannes Berg { 4008d7be102fSJohannes Berg reg_pdev = platform_device_register_simple("regulatory", 0, NULL, 0); 4009d7be102fSJohannes Berg if (IS_ERR(reg_pdev)) 4010d7be102fSJohannes Berg return PTR_ERR(reg_pdev); 4011d7be102fSJohannes Berg 4012d7be102fSJohannes Berg spin_lock_init(®_requests_lock); 4013d7be102fSJohannes Berg spin_lock_init(®_pending_beacons_lock); 4014d7be102fSJohannes Berg spin_lock_init(®_indoor_lock); 4015d7be102fSJohannes Berg 4016d7be102fSJohannes Berg rcu_assign_pointer(cfg80211_regdomain, cfg80211_world_regdom); 4017d7be102fSJohannes Berg 4018d7be102fSJohannes Berg user_alpha2[0] = '9'; 4019d7be102fSJohannes Berg user_alpha2[1] = '7'; 4020d7be102fSJohannes Berg 4021d7be102fSJohannes Berg #ifdef MODULE 4022d7be102fSJohannes Berg return regulatory_init_db(); 4023d7be102fSJohannes Berg #else 4024d7be102fSJohannes Berg return 0; 4025d7be102fSJohannes Berg #endif 4026d7be102fSJohannes Berg } 4027b2e1b302SLuis R. Rodriguez 40281a919318SJohannes Berg void regulatory_exit(void) 4029b2e1b302SLuis R. Rodriguez { 4030fe33eb39SLuis R. Rodriguez struct regulatory_request *reg_request, *tmp; 4031e38f8a7aSLuis R. Rodriguez struct reg_beacon *reg_beacon, *btmp; 4032fe33eb39SLuis R. Rodriguez 4033fe33eb39SLuis R. Rodriguez cancel_work_sync(®_work); 4034b6863036SJohannes Berg cancel_crda_timeout_sync(); 4035ad932f04SArik Nemtsov cancel_delayed_work_sync(®_check_chans); 4036fe33eb39SLuis R. Rodriguez 40379027b149SJohannes Berg /* Lock to suppress warnings */ 403838fd2143SJohannes Berg rtnl_lock(); 4039379b82f4SJohannes Berg reset_regdomains(true, NULL); 404038fd2143SJohannes Berg rtnl_unlock(); 4041734366deSJohannes Berg 404258ebacc6SLuis R. Rodriguez dev_set_uevent_suppress(®_pdev->dev, true); 4043f6037d09SJohannes Berg 4044b2e1b302SLuis R. Rodriguez platform_device_unregister(reg_pdev); 4045734366deSJohannes Berg 4046fea9bcedSJohannes Berg list_for_each_entry_safe(reg_beacon, btmp, ®_pending_beacons, list) { 4047e38f8a7aSLuis R. Rodriguez list_del(®_beacon->list); 4048e38f8a7aSLuis R. Rodriguez kfree(reg_beacon); 4049e38f8a7aSLuis R. Rodriguez } 4050e38f8a7aSLuis R. Rodriguez 4051fea9bcedSJohannes Berg list_for_each_entry_safe(reg_beacon, btmp, ®_beacon_list, list) { 4052e38f8a7aSLuis R. Rodriguez list_del(®_beacon->list); 4053e38f8a7aSLuis R. Rodriguez kfree(reg_beacon); 4054e38f8a7aSLuis R. Rodriguez } 4055e38f8a7aSLuis R. Rodriguez 4056fea9bcedSJohannes Berg list_for_each_entry_safe(reg_request, tmp, ®_requests_list, list) { 4057fe33eb39SLuis R. Rodriguez list_del(®_request->list); 4058fe33eb39SLuis R. Rodriguez kfree(reg_request); 4059fe33eb39SLuis R. Rodriguez } 4060007f6c5eSJohannes Berg 4061007f6c5eSJohannes Berg if (!IS_ERR_OR_NULL(regdb)) 4062007f6c5eSJohannes Berg kfree(regdb); 4063e646a025SJohannes Berg if (!IS_ERR_OR_NULL(cfg80211_user_regdom)) 4064e646a025SJohannes Berg kfree(cfg80211_user_regdom); 406590a53e44SJohannes Berg 406690a53e44SJohannes Berg free_regdb_keyring(); 4067fe33eb39SLuis R. Rodriguez } 4068