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 78318d78aSJohannes Berg * 83b77d5ecSLuis R. Rodriguez * Permission to use, copy, modify, and/or distribute this software for any 93b77d5ecSLuis R. Rodriguez * purpose with or without fee is hereby granted, provided that the above 103b77d5ecSLuis R. Rodriguez * copyright notice and this permission notice appear in all copies. 113b77d5ecSLuis R. Rodriguez * 123b77d5ecSLuis R. Rodriguez * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 133b77d5ecSLuis R. Rodriguez * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 143b77d5ecSLuis R. Rodriguez * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 153b77d5ecSLuis R. Rodriguez * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 163b77d5ecSLuis R. Rodriguez * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 173b77d5ecSLuis R. Rodriguez * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 183b77d5ecSLuis R. Rodriguez * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 198318d78aSJohannes Berg */ 208318d78aSJohannes Berg 213b77d5ecSLuis R. Rodriguez 22b2e1b302SLuis R. Rodriguez /** 23b2e1b302SLuis R. Rodriguez * DOC: Wireless regulatory infrastructure 248318d78aSJohannes Berg * 258318d78aSJohannes Berg * The usual implementation is for a driver to read a device EEPROM to 268318d78aSJohannes Berg * determine which regulatory domain it should be operating under, then 278318d78aSJohannes Berg * looking up the allowable channels in a driver-local table and finally 288318d78aSJohannes Berg * registering those channels in the wiphy structure. 298318d78aSJohannes Berg * 30b2e1b302SLuis R. Rodriguez * Another set of compliance enforcement is for drivers to use their 31b2e1b302SLuis R. Rodriguez * own compliance limits which can be stored on the EEPROM. The host 32b2e1b302SLuis R. Rodriguez * driver or firmware may ensure these are used. 33b2e1b302SLuis R. Rodriguez * 34b2e1b302SLuis R. Rodriguez * In addition to all this we provide an extra layer of regulatory 35b2e1b302SLuis R. Rodriguez * conformance. For drivers which do not have any regulatory 36b2e1b302SLuis R. Rodriguez * information CRDA provides the complete regulatory solution. 37b2e1b302SLuis R. Rodriguez * For others it provides a community effort on further restrictions 38b2e1b302SLuis R. Rodriguez * to enhance compliance. 39b2e1b302SLuis R. Rodriguez * 40b2e1b302SLuis R. Rodriguez * Note: When number of rules --> infinity we will not be able to 41b2e1b302SLuis R. Rodriguez * index on alpha2 any more, instead we'll probably have to 42b2e1b302SLuis R. Rodriguez * rely on some SHA1 checksum of the regdomain for example. 43b2e1b302SLuis R. Rodriguez * 448318d78aSJohannes Berg */ 45e9c0268fSJoe Perches 46e9c0268fSJoe Perches #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 47e9c0268fSJoe Perches 488318d78aSJohannes Berg #include <linux/kernel.h> 49bc3b2d7fSPaul Gortmaker #include <linux/export.h> 505a0e3ad6STejun Heo #include <linux/slab.h> 51b2e1b302SLuis R. Rodriguez #include <linux/list.h> 52c61029c7SJohn W. Linville #include <linux/ctype.h> 53b2e1b302SLuis R. Rodriguez #include <linux/nl80211.h> 54b2e1b302SLuis R. Rodriguez #include <linux/platform_device.h> 55d9b93842SPaul Gortmaker #include <linux/moduleparam.h> 56b2e1b302SLuis R. Rodriguez #include <net/cfg80211.h> 578318d78aSJohannes Berg #include "core.h" 58b2e1b302SLuis R. Rodriguez #include "reg.h" 59ad932f04SArik Nemtsov #include "rdev-ops.h" 603b377ea9SJohn W. Linville #include "regdb.h" 6173d54c9eSLuis R. Rodriguez #include "nl80211.h" 628318d78aSJohannes Berg 634113f751SLuis R. Rodriguez #ifdef CONFIG_CFG80211_REG_DEBUG 648271195eSJohn W. Linville #define REG_DBG_PRINT(format, args...) \ 6512c5ffb5SJoe Perches printk(KERN_DEBUG pr_fmt(format), ##args) 664113f751SLuis R. Rodriguez #else 678271195eSJohn W. Linville #define REG_DBG_PRINT(args...) 684113f751SLuis R. Rodriguez #endif 694113f751SLuis R. Rodriguez 70ad932f04SArik Nemtsov /* 71ad932f04SArik Nemtsov * Grace period we give before making sure all current interfaces reside on 72ad932f04SArik Nemtsov * channels allowed by the current regulatory domain. 73ad932f04SArik Nemtsov */ 74ad932f04SArik Nemtsov #define REG_ENFORCE_GRACE_MS 60000 75ad932f04SArik Nemtsov 7652616f2bSIlan Peer /** 7752616f2bSIlan Peer * enum reg_request_treatment - regulatory request treatment 7852616f2bSIlan Peer * 7952616f2bSIlan Peer * @REG_REQ_OK: continue processing the regulatory request 8052616f2bSIlan Peer * @REG_REQ_IGNORE: ignore the regulatory request 8152616f2bSIlan Peer * @REG_REQ_INTERSECT: the regulatory domain resulting from this request should 8252616f2bSIlan Peer * be intersected with the current one. 8352616f2bSIlan Peer * @REG_REQ_ALREADY_SET: the regulatory request will not change the current 8452616f2bSIlan Peer * regulatory settings, and no further processing is required. 8552616f2bSIlan Peer */ 862f92212bSJohannes Berg enum reg_request_treatment { 872f92212bSJohannes Berg REG_REQ_OK, 882f92212bSJohannes Berg REG_REQ_IGNORE, 892f92212bSJohannes Berg REG_REQ_INTERSECT, 902f92212bSJohannes Berg REG_REQ_ALREADY_SET, 912f92212bSJohannes Berg }; 922f92212bSJohannes Berg 93a042994dSLuis R. Rodriguez static struct regulatory_request core_request_world = { 94a042994dSLuis R. Rodriguez .initiator = NL80211_REGDOM_SET_BY_CORE, 95a042994dSLuis R. Rodriguez .alpha2[0] = '0', 96a042994dSLuis R. Rodriguez .alpha2[1] = '0', 97a042994dSLuis R. Rodriguez .intersect = false, 98a042994dSLuis R. Rodriguez .processed = true, 99a042994dSLuis R. Rodriguez .country_ie_env = ENVIRON_ANY, 100a042994dSLuis R. Rodriguez }; 101a042994dSLuis R. Rodriguez 10238fd2143SJohannes Berg /* 10338fd2143SJohannes Berg * Receipt of information from last regulatory request, 10438fd2143SJohannes Berg * protected by RTNL (and can be accessed with RCU protection) 10538fd2143SJohannes Berg */ 106c492db37SJohannes Berg static struct regulatory_request __rcu *last_request = 107cec3f0edSJohannes Berg (void __force __rcu *)&core_request_world; 108734366deSJohannes Berg 109b2e1b302SLuis R. Rodriguez /* To trigger userspace events */ 110b2e1b302SLuis R. Rodriguez static struct platform_device *reg_pdev; 1118318d78aSJohannes Berg 112fb1fc7adSLuis R. Rodriguez /* 113fb1fc7adSLuis R. Rodriguez * Central wireless core regulatory domains, we only need two, 114734366deSJohannes Berg * the current one and a world regulatory domain in case we have no 115e8da2bb4SJohannes Berg * information to give us an alpha2. 11638fd2143SJohannes Berg * (protected by RTNL, can be read under RCU) 117fb1fc7adSLuis R. Rodriguez */ 118458f4f9eSJohannes Berg const struct ieee80211_regdomain __rcu *cfg80211_regdomain; 119734366deSJohannes Berg 120fb1fc7adSLuis R. Rodriguez /* 12157b5ce07SLuis R. Rodriguez * Number of devices that registered to the core 12257b5ce07SLuis R. Rodriguez * that support cellular base station regulatory hints 12338fd2143SJohannes Berg * (protected by RTNL) 12457b5ce07SLuis R. Rodriguez */ 12557b5ce07SLuis R. Rodriguez static int reg_num_devs_support_basehint; 12657b5ce07SLuis R. Rodriguez 12752616f2bSIlan Peer /* 12852616f2bSIlan Peer * State variable indicating if the platform on which the devices 12952616f2bSIlan Peer * are attached is operating in an indoor environment. The state variable 13052616f2bSIlan Peer * is relevant for all registered devices. 13152616f2bSIlan Peer * (protected by RTNL) 13252616f2bSIlan Peer */ 13352616f2bSIlan Peer static bool reg_is_indoor; 13452616f2bSIlan Peer 135458f4f9eSJohannes Berg static const struct ieee80211_regdomain *get_cfg80211_regdom(void) 136458f4f9eSJohannes Berg { 13738fd2143SJohannes Berg return rtnl_dereference(cfg80211_regdomain); 138458f4f9eSJohannes Berg } 139458f4f9eSJohannes Berg 140ad30ca2cSArik Nemtsov const struct ieee80211_regdomain *get_wiphy_regdom(struct wiphy *wiphy) 141458f4f9eSJohannes Berg { 14238fd2143SJohannes Berg return rtnl_dereference(wiphy->regd); 143458f4f9eSJohannes Berg } 144458f4f9eSJohannes Berg 1453ef121b5SLuis R. Rodriguez static const char *reg_dfs_region_str(enum nl80211_dfs_regions dfs_region) 1463ef121b5SLuis R. Rodriguez { 1473ef121b5SLuis R. Rodriguez switch (dfs_region) { 1483ef121b5SLuis R. Rodriguez case NL80211_DFS_UNSET: 1493ef121b5SLuis R. Rodriguez return "unset"; 1503ef121b5SLuis R. Rodriguez case NL80211_DFS_FCC: 1513ef121b5SLuis R. Rodriguez return "FCC"; 1523ef121b5SLuis R. Rodriguez case NL80211_DFS_ETSI: 1533ef121b5SLuis R. Rodriguez return "ETSI"; 1543ef121b5SLuis R. Rodriguez case NL80211_DFS_JP: 1553ef121b5SLuis R. Rodriguez return "JP"; 1563ef121b5SLuis R. Rodriguez } 1573ef121b5SLuis R. Rodriguez return "Unknown"; 1583ef121b5SLuis R. Rodriguez } 1593ef121b5SLuis R. Rodriguez 1606c474799SLuis R. Rodriguez enum nl80211_dfs_regions reg_get_dfs_region(struct wiphy *wiphy) 1616c474799SLuis R. Rodriguez { 1626c474799SLuis R. Rodriguez const struct ieee80211_regdomain *regd = NULL; 1636c474799SLuis R. Rodriguez const struct ieee80211_regdomain *wiphy_regd = NULL; 1646c474799SLuis R. Rodriguez 1656c474799SLuis R. Rodriguez regd = get_cfg80211_regdom(); 1666c474799SLuis R. Rodriguez if (!wiphy) 1676c474799SLuis R. Rodriguez goto out; 1686c474799SLuis R. Rodriguez 1696c474799SLuis R. Rodriguez wiphy_regd = get_wiphy_regdom(wiphy); 1706c474799SLuis R. Rodriguez if (!wiphy_regd) 1716c474799SLuis R. Rodriguez goto out; 1726c474799SLuis R. Rodriguez 1736c474799SLuis R. Rodriguez if (wiphy_regd->dfs_region == regd->dfs_region) 1746c474799SLuis R. Rodriguez goto out; 1756c474799SLuis R. Rodriguez 1766c474799SLuis R. Rodriguez REG_DBG_PRINT("%s: device specific dfs_region " 1776c474799SLuis R. Rodriguez "(%s) disagrees with cfg80211's " 1786c474799SLuis R. Rodriguez "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 221a90c7a31SLuis R. Rodriguez static void reg_timeout_work(struct work_struct *work); 222a90c7a31SLuis R. Rodriguez static DECLARE_DELAYED_WORK(reg_timeout, reg_timeout_work); 223a90c7a31SLuis R. Rodriguez 224734366deSJohannes Berg /* We keep a static world regulatory domain in case of the absence of CRDA */ 225734366deSJohannes Berg static const struct ieee80211_regdomain world_regdom = { 22690cdc6dfSVladimir Kondratiev .n_reg_rules = 6, 227734366deSJohannes Berg .alpha2 = "00", 228734366deSJohannes Berg .reg_rules = { 22968798a62SLuis R. Rodriguez /* IEEE 802.11b/g, channels 1..11 */ 23068798a62SLuis R. Rodriguez REG_RULE(2412-10, 2462+10, 40, 6, 20, 0), 23143c771a1SJohannes Berg /* IEEE 802.11b/g, channels 12..13. */ 23243c771a1SJohannes Berg REG_RULE(2467-10, 2472+10, 40, 6, 20, 2338fe02e16SLuis R. Rodriguez NL80211_RRF_NO_IR), 234611b6a82SLuis R. Rodriguez /* IEEE 802.11 channel 14 - Only JP enables 235611b6a82SLuis R. Rodriguez * this and for 802.11b only */ 236611b6a82SLuis R. Rodriguez REG_RULE(2484-10, 2484+10, 20, 6, 20, 2378fe02e16SLuis R. Rodriguez NL80211_RRF_NO_IR | 238611b6a82SLuis R. Rodriguez NL80211_RRF_NO_OFDM), 2393fc71f77SLuis R. Rodriguez /* IEEE 802.11a, channel 36..48 */ 240131a19bcSJohannes Berg REG_RULE(5180-10, 5240+10, 160, 6, 20, 2418fe02e16SLuis R. Rodriguez NL80211_RRF_NO_IR), 2423fc71f77SLuis R. Rodriguez 243131a19bcSJohannes Berg /* IEEE 802.11a, channel 52..64 - DFS required */ 244131a19bcSJohannes Berg REG_RULE(5260-10, 5320+10, 160, 6, 20, 2458fe02e16SLuis R. Rodriguez NL80211_RRF_NO_IR | 246131a19bcSJohannes Berg NL80211_RRF_DFS), 247131a19bcSJohannes Berg 248131a19bcSJohannes Berg /* IEEE 802.11a, channel 100..144 - DFS required */ 249131a19bcSJohannes Berg REG_RULE(5500-10, 5720+10, 160, 6, 20, 2508fe02e16SLuis R. Rodriguez NL80211_RRF_NO_IR | 251131a19bcSJohannes Berg NL80211_RRF_DFS), 2523fc71f77SLuis R. Rodriguez 2533fc71f77SLuis R. Rodriguez /* IEEE 802.11a, channel 149..165 */ 2548ab9d85cSJohannes Berg REG_RULE(5745-10, 5825+10, 80, 6, 20, 2558fe02e16SLuis R. Rodriguez NL80211_RRF_NO_IR), 25690cdc6dfSVladimir Kondratiev 25790cdc6dfSVladimir Kondratiev /* IEEE 802.11ad (60gHz), channels 1..3 */ 25890cdc6dfSVladimir Kondratiev REG_RULE(56160+2160*1-1080, 56160+2160*3+1080, 2160, 0, 0, 0), 259734366deSJohannes Berg } 260734366deSJohannes Berg }; 261734366deSJohannes Berg 26238fd2143SJohannes Berg /* protected by RTNL */ 263a3d2eaf0SJohannes Berg static const struct ieee80211_regdomain *cfg80211_world_regdom = 264a3d2eaf0SJohannes Berg &world_regdom; 265734366deSJohannes Berg 2666ee7d330SLuis R. Rodriguez static char *ieee80211_regdom = "00"; 26709d989d1SLuis R. Rodriguez static char user_alpha2[2]; 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 { 274c888393bSArik Nemtsov if (request != get_last_request()) 275c888393bSArik Nemtsov kfree(request); 276c888393bSArik Nemtsov } 277c888393bSArik Nemtsov 278c888393bSArik Nemtsov static void reg_free_last_request(void) 279c888393bSArik Nemtsov { 280c888393bSArik Nemtsov struct regulatory_request *lr = get_last_request(); 281c888393bSArik Nemtsov 2825ad6ef5eSLuis R. Rodriguez if (lr != &core_request_world && lr) 2835ad6ef5eSLuis R. Rodriguez kfree_rcu(lr, rcu_head); 2845ad6ef5eSLuis R. Rodriguez } 2855ad6ef5eSLuis R. Rodriguez 28605f1a3eaSLuis R. Rodriguez static void reg_update_last_request(struct regulatory_request *request) 28705f1a3eaSLuis R. Rodriguez { 288255e25b0SLuis R. Rodriguez struct regulatory_request *lr; 289255e25b0SLuis R. Rodriguez 290255e25b0SLuis R. Rodriguez lr = get_last_request(); 291255e25b0SLuis R. Rodriguez if (lr == request) 292255e25b0SLuis R. Rodriguez return; 293255e25b0SLuis R. Rodriguez 294c888393bSArik Nemtsov reg_free_last_request(); 29505f1a3eaSLuis R. Rodriguez rcu_assign_pointer(last_request, request); 29605f1a3eaSLuis R. Rodriguez } 29705f1a3eaSLuis R. Rodriguez 298379b82f4SJohannes Berg static void reset_regdomains(bool full_reset, 299379b82f4SJohannes Berg const struct ieee80211_regdomain *new_regdom) 300734366deSJohannes Berg { 301458f4f9eSJohannes Berg const struct ieee80211_regdomain *r; 302458f4f9eSJohannes Berg 30338fd2143SJohannes Berg ASSERT_RTNL(); 304e8da2bb4SJohannes Berg 305458f4f9eSJohannes Berg r = get_cfg80211_regdom(); 306458f4f9eSJohannes Berg 307942b25cfSJohannes Berg /* avoid freeing static information or freeing something twice */ 308458f4f9eSJohannes Berg if (r == cfg80211_world_regdom) 309458f4f9eSJohannes Berg r = NULL; 310942b25cfSJohannes Berg if (cfg80211_world_regdom == &world_regdom) 311942b25cfSJohannes Berg cfg80211_world_regdom = NULL; 312458f4f9eSJohannes Berg if (r == &world_regdom) 313458f4f9eSJohannes Berg r = NULL; 314942b25cfSJohannes Berg 315458f4f9eSJohannes Berg rcu_free_regdom(r); 316458f4f9eSJohannes Berg rcu_free_regdom(cfg80211_world_regdom); 317734366deSJohannes Berg 318a3d2eaf0SJohannes Berg cfg80211_world_regdom = &world_regdom; 319458f4f9eSJohannes Berg rcu_assign_pointer(cfg80211_regdomain, new_regdom); 320a042994dSLuis R. Rodriguez 321a042994dSLuis R. Rodriguez if (!full_reset) 322a042994dSLuis R. Rodriguez return; 323a042994dSLuis R. Rodriguez 32405f1a3eaSLuis R. Rodriguez reg_update_last_request(&core_request_world); 325734366deSJohannes Berg } 326734366deSJohannes Berg 327fb1fc7adSLuis R. Rodriguez /* 328fb1fc7adSLuis R. Rodriguez * Dynamic world regulatory domain requested by the wireless 329fb1fc7adSLuis R. Rodriguez * core upon initialization 330fb1fc7adSLuis R. Rodriguez */ 331a3d2eaf0SJohannes Berg static void update_world_regdomain(const struct ieee80211_regdomain *rd) 332734366deSJohannes Berg { 333c492db37SJohannes Berg struct regulatory_request *lr; 334734366deSJohannes Berg 335c492db37SJohannes Berg lr = get_last_request(); 336c492db37SJohannes Berg 337c492db37SJohannes Berg WARN_ON(!lr); 338e8da2bb4SJohannes Berg 339379b82f4SJohannes Berg reset_regdomains(false, rd); 340734366deSJohannes Berg 341734366deSJohannes Berg cfg80211_world_regdom = rd; 342734366deSJohannes Berg } 343734366deSJohannes Berg 344a3d2eaf0SJohannes Berg bool is_world_regdom(const char *alpha2) 345b2e1b302SLuis R. Rodriguez { 346b2e1b302SLuis R. Rodriguez if (!alpha2) 347b2e1b302SLuis R. Rodriguez return false; 3481a919318SJohannes Berg return alpha2[0] == '0' && alpha2[1] == '0'; 349b2e1b302SLuis R. Rodriguez } 350b2e1b302SLuis R. Rodriguez 351a3d2eaf0SJohannes Berg static bool is_alpha2_set(const char *alpha2) 352b2e1b302SLuis R. Rodriguez { 353b2e1b302SLuis R. Rodriguez if (!alpha2) 354b2e1b302SLuis R. Rodriguez return false; 3551a919318SJohannes Berg return alpha2[0] && alpha2[1]; 356b2e1b302SLuis R. Rodriguez } 357b2e1b302SLuis R. Rodriguez 358a3d2eaf0SJohannes Berg static bool is_unknown_alpha2(const char *alpha2) 359b2e1b302SLuis R. Rodriguez { 360b2e1b302SLuis R. Rodriguez if (!alpha2) 361b2e1b302SLuis R. Rodriguez return false; 362fb1fc7adSLuis R. Rodriguez /* 363fb1fc7adSLuis R. Rodriguez * Special case where regulatory domain was built by driver 364fb1fc7adSLuis R. Rodriguez * but a specific alpha2 cannot be determined 365fb1fc7adSLuis R. Rodriguez */ 3661a919318SJohannes Berg return alpha2[0] == '9' && alpha2[1] == '9'; 367b2e1b302SLuis R. Rodriguez } 368b2e1b302SLuis R. Rodriguez 3693f2355cbSLuis R. Rodriguez static bool is_intersected_alpha2(const char *alpha2) 3703f2355cbSLuis R. Rodriguez { 3713f2355cbSLuis R. Rodriguez if (!alpha2) 3723f2355cbSLuis R. Rodriguez return false; 373fb1fc7adSLuis R. Rodriguez /* 374fb1fc7adSLuis R. Rodriguez * Special case where regulatory domain is the 3753f2355cbSLuis R. Rodriguez * result of an intersection between two regulatory domain 376fb1fc7adSLuis R. Rodriguez * structures 377fb1fc7adSLuis R. Rodriguez */ 3781a919318SJohannes Berg return alpha2[0] == '9' && alpha2[1] == '8'; 3793f2355cbSLuis R. Rodriguez } 3803f2355cbSLuis R. Rodriguez 381a3d2eaf0SJohannes Berg static bool is_an_alpha2(const char *alpha2) 382b2e1b302SLuis R. Rodriguez { 383b2e1b302SLuis R. Rodriguez if (!alpha2) 384b2e1b302SLuis R. Rodriguez return false; 3851a919318SJohannes Berg return isalpha(alpha2[0]) && isalpha(alpha2[1]); 386b2e1b302SLuis R. Rodriguez } 387b2e1b302SLuis R. Rodriguez 388a3d2eaf0SJohannes Berg static bool alpha2_equal(const char *alpha2_x, const char *alpha2_y) 389b2e1b302SLuis R. Rodriguez { 390b2e1b302SLuis R. Rodriguez if (!alpha2_x || !alpha2_y) 391b2e1b302SLuis R. Rodriguez return false; 3921a919318SJohannes Berg return alpha2_x[0] == alpha2_y[0] && alpha2_x[1] == alpha2_y[1]; 393b2e1b302SLuis R. Rodriguez } 394b2e1b302SLuis R. Rodriguez 39569b1572bSLuis R. Rodriguez static bool regdom_changes(const char *alpha2) 396b2e1b302SLuis R. Rodriguez { 397458f4f9eSJohannes Berg const struct ieee80211_regdomain *r = get_cfg80211_regdom(); 398761cf7ecSLuis R. Rodriguez 399458f4f9eSJohannes Berg if (!r) 400b2e1b302SLuis R. Rodriguez return true; 401458f4f9eSJohannes Berg return !alpha2_equal(r->alpha2, alpha2); 402b2e1b302SLuis R. Rodriguez } 403b2e1b302SLuis R. Rodriguez 40409d989d1SLuis R. Rodriguez /* 40509d989d1SLuis R. Rodriguez * The NL80211_REGDOM_SET_BY_USER regdom alpha2 is cached, this lets 40609d989d1SLuis R. Rodriguez * you know if a valid regulatory hint with NL80211_REGDOM_SET_BY_USER 40709d989d1SLuis R. Rodriguez * has ever been issued. 40809d989d1SLuis R. Rodriguez */ 40909d989d1SLuis R. Rodriguez static bool is_user_regdom_saved(void) 41009d989d1SLuis R. Rodriguez { 41109d989d1SLuis R. Rodriguez if (user_alpha2[0] == '9' && user_alpha2[1] == '7') 41209d989d1SLuis R. Rodriguez return false; 41309d989d1SLuis R. Rodriguez 41409d989d1SLuis R. Rodriguez /* This would indicate a mistake on the design */ 4151a919318SJohannes Berg if (WARN(!is_world_regdom(user_alpha2) && !is_an_alpha2(user_alpha2), 41609d989d1SLuis R. Rodriguez "Unexpected user alpha2: %c%c\n", 4171a919318SJohannes Berg user_alpha2[0], user_alpha2[1])) 41809d989d1SLuis R. Rodriguez return false; 41909d989d1SLuis R. Rodriguez 42009d989d1SLuis R. Rodriguez return true; 42109d989d1SLuis R. Rodriguez } 42209d989d1SLuis R. Rodriguez 423e9763c3cSJohannes Berg static const struct ieee80211_regdomain * 424e9763c3cSJohannes Berg reg_copy_regd(const struct ieee80211_regdomain *src_regd) 4253b377ea9SJohn W. Linville { 4263b377ea9SJohn W. Linville struct ieee80211_regdomain *regd; 427e9763c3cSJohannes Berg int size_of_regd; 4283b377ea9SJohn W. Linville unsigned int i; 4293b377ea9SJohn W. Linville 43082f20856SJohannes Berg size_of_regd = 43182f20856SJohannes Berg sizeof(struct ieee80211_regdomain) + 43282f20856SJohannes Berg src_regd->n_reg_rules * sizeof(struct ieee80211_reg_rule); 4333b377ea9SJohn W. Linville 4343b377ea9SJohn W. Linville regd = kzalloc(size_of_regd, GFP_KERNEL); 4353b377ea9SJohn W. Linville if (!regd) 436e9763c3cSJohannes Berg return ERR_PTR(-ENOMEM); 4373b377ea9SJohn W. Linville 4383b377ea9SJohn W. Linville memcpy(regd, src_regd, sizeof(struct ieee80211_regdomain)); 4393b377ea9SJohn W. Linville 4403b377ea9SJohn W. Linville for (i = 0; i < src_regd->n_reg_rules; i++) 4413b377ea9SJohn W. Linville memcpy(®d->reg_rules[i], &src_regd->reg_rules[i], 4423b377ea9SJohn W. Linville sizeof(struct ieee80211_reg_rule)); 4433b377ea9SJohn W. Linville 444e9763c3cSJohannes Berg return regd; 4453b377ea9SJohn W. Linville } 4463b377ea9SJohn W. Linville 4473b377ea9SJohn W. Linville #ifdef CONFIG_CFG80211_INTERNAL_REGDB 4483b377ea9SJohn W. Linville struct reg_regdb_search_request { 4493b377ea9SJohn W. Linville char alpha2[2]; 4503b377ea9SJohn W. Linville struct list_head list; 4513b377ea9SJohn W. Linville }; 4523b377ea9SJohn W. Linville 4533b377ea9SJohn W. Linville static LIST_HEAD(reg_regdb_search_list); 454368d06f5SJohn W. Linville static DEFINE_MUTEX(reg_regdb_search_mutex); 4553b377ea9SJohn W. Linville 4563b377ea9SJohn W. Linville static void reg_regdb_search(struct work_struct *work) 4573b377ea9SJohn W. Linville { 4583b377ea9SJohn W. Linville struct reg_regdb_search_request *request; 459e9763c3cSJohannes Berg const struct ieee80211_regdomain *curdom, *regdom = NULL; 460e9763c3cSJohannes Berg int i; 461a85d0d7fSLuis R. Rodriguez 4625fe231e8SJohannes Berg rtnl_lock(); 4633b377ea9SJohn W. Linville 464368d06f5SJohn W. Linville mutex_lock(®_regdb_search_mutex); 4653b377ea9SJohn W. Linville while (!list_empty(®_regdb_search_list)) { 4663b377ea9SJohn W. Linville request = list_first_entry(®_regdb_search_list, 4673b377ea9SJohn W. Linville struct reg_regdb_search_request, 4683b377ea9SJohn W. Linville list); 4693b377ea9SJohn W. Linville list_del(&request->list); 4703b377ea9SJohn W. Linville 4713b377ea9SJohn W. Linville for (i = 0; i < reg_regdb_size; i++) { 4723b377ea9SJohn W. Linville curdom = reg_regdb[i]; 4733b377ea9SJohn W. Linville 4741a919318SJohannes Berg if (alpha2_equal(request->alpha2, curdom->alpha2)) { 475e9763c3cSJohannes Berg regdom = reg_copy_regd(curdom); 4763b377ea9SJohn W. Linville break; 4773b377ea9SJohn W. Linville } 4783b377ea9SJohn W. Linville } 4793b377ea9SJohn W. Linville 4803b377ea9SJohn W. Linville kfree(request); 4813b377ea9SJohn W. Linville } 482368d06f5SJohn W. Linville mutex_unlock(®_regdb_search_mutex); 483a85d0d7fSLuis R. Rodriguez 484e9763c3cSJohannes Berg if (!IS_ERR_OR_NULL(regdom)) 485a85d0d7fSLuis R. Rodriguez set_regdom(regdom); 486a85d0d7fSLuis R. Rodriguez 4875fe231e8SJohannes Berg rtnl_unlock(); 4883b377ea9SJohn W. Linville } 4893b377ea9SJohn W. Linville 4903b377ea9SJohn W. Linville static DECLARE_WORK(reg_regdb_work, reg_regdb_search); 4913b377ea9SJohn W. Linville 4923b377ea9SJohn W. Linville static void reg_regdb_query(const char *alpha2) 4933b377ea9SJohn W. Linville { 4943b377ea9SJohn W. Linville struct reg_regdb_search_request *request; 4953b377ea9SJohn W. Linville 4963b377ea9SJohn W. Linville if (!alpha2) 4973b377ea9SJohn W. Linville return; 4983b377ea9SJohn W. Linville 4993b377ea9SJohn W. Linville request = kzalloc(sizeof(struct reg_regdb_search_request), GFP_KERNEL); 5003b377ea9SJohn W. Linville if (!request) 5013b377ea9SJohn W. Linville return; 5023b377ea9SJohn W. Linville 5033b377ea9SJohn W. Linville memcpy(request->alpha2, alpha2, 2); 5043b377ea9SJohn W. Linville 505368d06f5SJohn W. Linville mutex_lock(®_regdb_search_mutex); 5063b377ea9SJohn W. Linville list_add_tail(&request->list, ®_regdb_search_list); 507368d06f5SJohn W. Linville mutex_unlock(®_regdb_search_mutex); 5083b377ea9SJohn W. Linville 5093b377ea9SJohn W. Linville schedule_work(®_regdb_work); 5103b377ea9SJohn W. Linville } 51180007efeSLuis R. Rodriguez 51280007efeSLuis R. Rodriguez /* Feel free to add any other sanity checks here */ 51380007efeSLuis R. Rodriguez static void reg_regdb_size_check(void) 51480007efeSLuis R. Rodriguez { 51580007efeSLuis R. Rodriguez /* We should ideally BUILD_BUG_ON() but then random builds would fail */ 51680007efeSLuis R. Rodriguez WARN_ONCE(!reg_regdb_size, "db.txt is empty, you should update it..."); 51780007efeSLuis R. Rodriguez } 5183b377ea9SJohn W. Linville #else 51980007efeSLuis R. Rodriguez static inline void reg_regdb_size_check(void) {} 5203b377ea9SJohn W. Linville static inline void reg_regdb_query(const char *alpha2) {} 5213b377ea9SJohn W. Linville #endif /* CONFIG_CFG80211_INTERNAL_REGDB */ 5223b377ea9SJohn W. Linville 523fb1fc7adSLuis R. Rodriguez /* 524fb1fc7adSLuis R. Rodriguez * This lets us keep regulatory code which is updated on a regulatory 5251226d258SJohannes Berg * basis in userspace. 526fb1fc7adSLuis R. Rodriguez */ 527b2e1b302SLuis R. Rodriguez static int call_crda(const char *alpha2) 528b2e1b302SLuis R. Rodriguez { 5291226d258SJohannes Berg char country[12]; 5301226d258SJohannes Berg char *env[] = { country, NULL }; 5311226d258SJohannes Berg 5321226d258SJohannes Berg snprintf(country, sizeof(country), "COUNTRY=%c%c", 5331226d258SJohannes Berg alpha2[0], alpha2[1]); 5341226d258SJohannes Berg 535b2e1b302SLuis R. Rodriguez if (!is_world_regdom((char *) alpha2)) 536e9c0268fSJoe Perches pr_info("Calling CRDA for country: %c%c\n", 537b2e1b302SLuis R. Rodriguez alpha2[0], alpha2[1]); 538b2e1b302SLuis R. Rodriguez else 539e9c0268fSJoe Perches pr_info("Calling CRDA to update world regulatory domain\n"); 5408318d78aSJohannes Berg 5413b377ea9SJohn W. Linville /* query internal regulatory database (if it exists) */ 5423b377ea9SJohn W. Linville reg_regdb_query(alpha2); 5433b377ea9SJohn W. Linville 5441226d258SJohannes Berg return kobject_uevent_env(®_pdev->dev.kobj, KOBJ_CHANGE, env); 545b2e1b302SLuis R. Rodriguez } 546b2e1b302SLuis R. Rodriguez 547fe6631ffSLuis R. Rodriguez static enum reg_request_treatment 548fe6631ffSLuis R. Rodriguez reg_call_crda(struct regulatory_request *request) 549fe6631ffSLuis R. Rodriguez { 550fe6631ffSLuis R. Rodriguez if (call_crda(request->alpha2)) 551fe6631ffSLuis R. Rodriguez return REG_REQ_IGNORE; 552fe6631ffSLuis R. Rodriguez return REG_REQ_OK; 553fe6631ffSLuis R. Rodriguez } 554fe6631ffSLuis R. Rodriguez 555e438768fSLuis R. Rodriguez bool reg_is_valid_request(const char *alpha2) 556b2e1b302SLuis R. Rodriguez { 557c492db37SJohannes Berg struct regulatory_request *lr = get_last_request(); 55861405e97SLuis R. Rodriguez 559c492db37SJohannes Berg if (!lr || lr->processed) 560f6037d09SJohannes Berg return false; 561f6037d09SJohannes Berg 562c492db37SJohannes Berg return alpha2_equal(lr->alpha2, alpha2); 563b2e1b302SLuis R. Rodriguez } 564b2e1b302SLuis R. Rodriguez 565e3961af1SJanusz Dziedzic static const struct ieee80211_regdomain *reg_get_regdomain(struct wiphy *wiphy) 566e3961af1SJanusz Dziedzic { 567e3961af1SJanusz Dziedzic struct regulatory_request *lr = get_last_request(); 568e3961af1SJanusz Dziedzic 569e3961af1SJanusz Dziedzic /* 570e3961af1SJanusz Dziedzic * Follow the driver's regulatory domain, if present, unless a country 571e3961af1SJanusz Dziedzic * IE has been processed or a user wants to help complaince further 572e3961af1SJanusz Dziedzic */ 573e3961af1SJanusz Dziedzic if (lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && 574e3961af1SJanusz Dziedzic lr->initiator != NL80211_REGDOM_SET_BY_USER && 575e3961af1SJanusz Dziedzic wiphy->regd) 576e3961af1SJanusz Dziedzic return get_wiphy_regdom(wiphy); 577e3961af1SJanusz Dziedzic 578e3961af1SJanusz Dziedzic return get_cfg80211_regdom(); 579e3961af1SJanusz Dziedzic } 580e3961af1SJanusz Dziedzic 581a6d4a534SArik Nemtsov static unsigned int 582a6d4a534SArik Nemtsov reg_get_max_bandwidth_from_range(const struct ieee80211_regdomain *rd, 58397524820SJanusz Dziedzic const struct ieee80211_reg_rule *rule) 58497524820SJanusz Dziedzic { 58597524820SJanusz Dziedzic const struct ieee80211_freq_range *freq_range = &rule->freq_range; 58697524820SJanusz Dziedzic const struct ieee80211_freq_range *freq_range_tmp; 58797524820SJanusz Dziedzic const struct ieee80211_reg_rule *tmp; 58897524820SJanusz Dziedzic u32 start_freq, end_freq, idx, no; 58997524820SJanusz Dziedzic 59097524820SJanusz Dziedzic for (idx = 0; idx < rd->n_reg_rules; idx++) 59197524820SJanusz Dziedzic if (rule == &rd->reg_rules[idx]) 59297524820SJanusz Dziedzic break; 59397524820SJanusz Dziedzic 59497524820SJanusz Dziedzic if (idx == rd->n_reg_rules) 59597524820SJanusz Dziedzic return 0; 59697524820SJanusz Dziedzic 59797524820SJanusz Dziedzic /* get start_freq */ 59897524820SJanusz Dziedzic no = idx; 59997524820SJanusz Dziedzic 60097524820SJanusz Dziedzic while (no) { 60197524820SJanusz Dziedzic tmp = &rd->reg_rules[--no]; 60297524820SJanusz Dziedzic freq_range_tmp = &tmp->freq_range; 60397524820SJanusz Dziedzic 60497524820SJanusz Dziedzic if (freq_range_tmp->end_freq_khz < freq_range->start_freq_khz) 60597524820SJanusz Dziedzic break; 60697524820SJanusz Dziedzic 60797524820SJanusz Dziedzic freq_range = freq_range_tmp; 60897524820SJanusz Dziedzic } 60997524820SJanusz Dziedzic 61097524820SJanusz Dziedzic start_freq = freq_range->start_freq_khz; 61197524820SJanusz Dziedzic 61297524820SJanusz Dziedzic /* get end_freq */ 61397524820SJanusz Dziedzic freq_range = &rule->freq_range; 61497524820SJanusz Dziedzic no = idx; 61597524820SJanusz Dziedzic 61697524820SJanusz Dziedzic while (no < rd->n_reg_rules - 1) { 61797524820SJanusz Dziedzic tmp = &rd->reg_rules[++no]; 61897524820SJanusz Dziedzic freq_range_tmp = &tmp->freq_range; 61997524820SJanusz Dziedzic 62097524820SJanusz Dziedzic if (freq_range_tmp->start_freq_khz > freq_range->end_freq_khz) 62197524820SJanusz Dziedzic break; 62297524820SJanusz Dziedzic 62397524820SJanusz Dziedzic freq_range = freq_range_tmp; 62497524820SJanusz Dziedzic } 62597524820SJanusz Dziedzic 62697524820SJanusz Dziedzic end_freq = freq_range->end_freq_khz; 62797524820SJanusz Dziedzic 62897524820SJanusz Dziedzic return end_freq - start_freq; 62997524820SJanusz Dziedzic } 63097524820SJanusz Dziedzic 631a6d4a534SArik Nemtsov unsigned int reg_get_max_bandwidth(const struct ieee80211_regdomain *rd, 632a6d4a534SArik Nemtsov const struct ieee80211_reg_rule *rule) 633a6d4a534SArik Nemtsov { 634a6d4a534SArik Nemtsov unsigned int bw = reg_get_max_bandwidth_from_range(rd, rule); 635a6d4a534SArik Nemtsov 636a6d4a534SArik Nemtsov if (rule->flags & NL80211_RRF_NO_160MHZ) 637a6d4a534SArik Nemtsov bw = min_t(unsigned int, bw, MHZ_TO_KHZ(80)); 638a6d4a534SArik Nemtsov if (rule->flags & NL80211_RRF_NO_80MHZ) 639a6d4a534SArik Nemtsov bw = min_t(unsigned int, bw, MHZ_TO_KHZ(40)); 640a6d4a534SArik Nemtsov 641a6d4a534SArik Nemtsov /* 642a6d4a534SArik Nemtsov * HT40+/HT40- limits are handled per-channel. Only limit BW if both 643a6d4a534SArik Nemtsov * are not allowed. 644a6d4a534SArik Nemtsov */ 645a6d4a534SArik Nemtsov if (rule->flags & NL80211_RRF_NO_HT40MINUS && 646a6d4a534SArik Nemtsov rule->flags & NL80211_RRF_NO_HT40PLUS) 647a6d4a534SArik Nemtsov bw = min_t(unsigned int, bw, MHZ_TO_KHZ(20)); 648a6d4a534SArik Nemtsov 649a6d4a534SArik Nemtsov return bw; 650a6d4a534SArik Nemtsov } 651a6d4a534SArik Nemtsov 652b2e1b302SLuis R. Rodriguez /* Sanity check on a regulatory rule */ 653a3d2eaf0SJohannes Berg static bool is_valid_reg_rule(const struct ieee80211_reg_rule *rule) 654b2e1b302SLuis R. Rodriguez { 655a3d2eaf0SJohannes Berg const struct ieee80211_freq_range *freq_range = &rule->freq_range; 656b2e1b302SLuis R. Rodriguez u32 freq_diff; 657b2e1b302SLuis R. Rodriguez 65891e99004SLuis R. Rodriguez if (freq_range->start_freq_khz <= 0 || freq_range->end_freq_khz <= 0) 659b2e1b302SLuis R. Rodriguez return false; 660b2e1b302SLuis R. Rodriguez 661b2e1b302SLuis R. Rodriguez if (freq_range->start_freq_khz > freq_range->end_freq_khz) 662b2e1b302SLuis R. Rodriguez return false; 663b2e1b302SLuis R. Rodriguez 664b2e1b302SLuis R. Rodriguez freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz; 665b2e1b302SLuis R. Rodriguez 666bd05f28eSRoel Kluin if (freq_range->end_freq_khz <= freq_range->start_freq_khz || 667bd05f28eSRoel Kluin freq_range->max_bandwidth_khz > freq_diff) 668b2e1b302SLuis R. Rodriguez return false; 669b2e1b302SLuis R. Rodriguez 670b2e1b302SLuis R. Rodriguez return true; 671b2e1b302SLuis R. Rodriguez } 672b2e1b302SLuis R. Rodriguez 673a3d2eaf0SJohannes Berg static bool is_valid_rd(const struct ieee80211_regdomain *rd) 674b2e1b302SLuis R. Rodriguez { 675a3d2eaf0SJohannes Berg const struct ieee80211_reg_rule *reg_rule = NULL; 676b2e1b302SLuis R. Rodriguez unsigned int i; 677b2e1b302SLuis R. Rodriguez 678b2e1b302SLuis R. Rodriguez if (!rd->n_reg_rules) 679b2e1b302SLuis R. Rodriguez return false; 680b2e1b302SLuis R. Rodriguez 68188dc1c3fSLuis R. Rodriguez if (WARN_ON(rd->n_reg_rules > NL80211_MAX_SUPP_REG_RULES)) 68288dc1c3fSLuis R. Rodriguez return false; 68388dc1c3fSLuis R. Rodriguez 684b2e1b302SLuis R. Rodriguez for (i = 0; i < rd->n_reg_rules; i++) { 685b2e1b302SLuis R. Rodriguez reg_rule = &rd->reg_rules[i]; 686b2e1b302SLuis R. Rodriguez if (!is_valid_reg_rule(reg_rule)) 687b2e1b302SLuis R. Rodriguez return false; 688b2e1b302SLuis R. Rodriguez } 689b2e1b302SLuis R. Rodriguez 690b2e1b302SLuis R. Rodriguez return true; 691b2e1b302SLuis R. Rodriguez } 692b2e1b302SLuis R. Rodriguez 693038659e7SLuis R. Rodriguez static bool reg_does_bw_fit(const struct ieee80211_freq_range *freq_range, 694fe7ef5e9SJohannes Berg u32 center_freq_khz, u32 bw_khz) 695b2e1b302SLuis R. Rodriguez { 696038659e7SLuis R. Rodriguez u32 start_freq_khz, end_freq_khz; 697038659e7SLuis R. Rodriguez 698038659e7SLuis R. Rodriguez start_freq_khz = center_freq_khz - (bw_khz/2); 699038659e7SLuis R. Rodriguez end_freq_khz = center_freq_khz + (bw_khz/2); 700038659e7SLuis R. Rodriguez 701b2e1b302SLuis R. Rodriguez if (start_freq_khz >= freq_range->start_freq_khz && 702b2e1b302SLuis R. Rodriguez end_freq_khz <= freq_range->end_freq_khz) 703038659e7SLuis R. Rodriguez return true; 704038659e7SLuis R. Rodriguez 705038659e7SLuis R. Rodriguez return false; 706b2e1b302SLuis R. Rodriguez } 707b2e1b302SLuis R. Rodriguez 7080c7dc45dSLuis R. Rodriguez /** 7090c7dc45dSLuis R. Rodriguez * freq_in_rule_band - tells us if a frequency is in a frequency band 7100c7dc45dSLuis R. Rodriguez * @freq_range: frequency rule we want to query 7110c7dc45dSLuis R. Rodriguez * @freq_khz: frequency we are inquiring about 7120c7dc45dSLuis R. Rodriguez * 7130c7dc45dSLuis R. Rodriguez * This lets us know if a specific frequency rule is or is not relevant to 7140c7dc45dSLuis R. Rodriguez * a specific frequency's band. Bands are device specific and artificial 71564629b9dSVladimir Kondratiev * definitions (the "2.4 GHz band", the "5 GHz band" and the "60GHz band"), 71664629b9dSVladimir Kondratiev * however it is safe for now to assume that a frequency rule should not be 71764629b9dSVladimir Kondratiev * part of a frequency's band if the start freq or end freq are off by more 71864629b9dSVladimir Kondratiev * than 2 GHz for the 2.4 and 5 GHz bands, and by more than 10 GHz for the 71964629b9dSVladimir Kondratiev * 60 GHz band. 7200c7dc45dSLuis R. Rodriguez * This resolution can be lowered and should be considered as we add 7210c7dc45dSLuis R. Rodriguez * regulatory rule support for other "bands". 7220c7dc45dSLuis R. Rodriguez **/ 7230c7dc45dSLuis R. Rodriguez static bool freq_in_rule_band(const struct ieee80211_freq_range *freq_range, 7240c7dc45dSLuis R. Rodriguez u32 freq_khz) 7250c7dc45dSLuis R. Rodriguez { 7260c7dc45dSLuis R. Rodriguez #define ONE_GHZ_IN_KHZ 1000000 72764629b9dSVladimir Kondratiev /* 72864629b9dSVladimir Kondratiev * From 802.11ad: directional multi-gigabit (DMG): 72964629b9dSVladimir Kondratiev * Pertaining to operation in a frequency band containing a channel 73064629b9dSVladimir Kondratiev * with the Channel starting frequency above 45 GHz. 73164629b9dSVladimir Kondratiev */ 73264629b9dSVladimir Kondratiev u32 limit = freq_khz > 45 * ONE_GHZ_IN_KHZ ? 73364629b9dSVladimir Kondratiev 10 * ONE_GHZ_IN_KHZ : 2 * ONE_GHZ_IN_KHZ; 73464629b9dSVladimir Kondratiev if (abs(freq_khz - freq_range->start_freq_khz) <= limit) 7350c7dc45dSLuis R. Rodriguez return true; 73664629b9dSVladimir Kondratiev if (abs(freq_khz - freq_range->end_freq_khz) <= limit) 7370c7dc45dSLuis R. Rodriguez return true; 7380c7dc45dSLuis R. Rodriguez return false; 7390c7dc45dSLuis R. Rodriguez #undef ONE_GHZ_IN_KHZ 7400c7dc45dSLuis R. Rodriguez } 7410c7dc45dSLuis R. Rodriguez 742fb1fc7adSLuis R. Rodriguez /* 743adbfb058SLuis R. Rodriguez * Later on we can perhaps use the more restrictive DFS 744adbfb058SLuis R. Rodriguez * region but we don't have information for that yet so 745adbfb058SLuis R. Rodriguez * for now simply disallow conflicts. 746adbfb058SLuis R. Rodriguez */ 747adbfb058SLuis R. Rodriguez static enum nl80211_dfs_regions 748adbfb058SLuis R. Rodriguez reg_intersect_dfs_region(const enum nl80211_dfs_regions dfs_region1, 749adbfb058SLuis R. Rodriguez const enum nl80211_dfs_regions dfs_region2) 750adbfb058SLuis R. Rodriguez { 751adbfb058SLuis R. Rodriguez if (dfs_region1 != dfs_region2) 752adbfb058SLuis R. Rodriguez return NL80211_DFS_UNSET; 753adbfb058SLuis R. Rodriguez return dfs_region1; 754adbfb058SLuis R. Rodriguez } 755adbfb058SLuis R. Rodriguez 756adbfb058SLuis R. Rodriguez /* 757fb1fc7adSLuis R. Rodriguez * Helper for regdom_intersect(), this does the real 758fb1fc7adSLuis R. Rodriguez * mathematical intersection fun 759fb1fc7adSLuis R. Rodriguez */ 76097524820SJanusz Dziedzic static int reg_rules_intersect(const struct ieee80211_regdomain *rd1, 76197524820SJanusz Dziedzic const struct ieee80211_regdomain *rd2, 76297524820SJanusz Dziedzic const struct ieee80211_reg_rule *rule1, 7639c96477dSLuis R. Rodriguez const struct ieee80211_reg_rule *rule2, 7649c96477dSLuis R. Rodriguez struct ieee80211_reg_rule *intersected_rule) 7659c96477dSLuis R. Rodriguez { 7669c96477dSLuis R. Rodriguez const struct ieee80211_freq_range *freq_range1, *freq_range2; 7679c96477dSLuis R. Rodriguez struct ieee80211_freq_range *freq_range; 7689c96477dSLuis R. Rodriguez const struct ieee80211_power_rule *power_rule1, *power_rule2; 7699c96477dSLuis R. Rodriguez struct ieee80211_power_rule *power_rule; 77097524820SJanusz Dziedzic u32 freq_diff, max_bandwidth1, max_bandwidth2; 7719c96477dSLuis R. Rodriguez 7729c96477dSLuis R. Rodriguez freq_range1 = &rule1->freq_range; 7739c96477dSLuis R. Rodriguez freq_range2 = &rule2->freq_range; 7749c96477dSLuis R. Rodriguez freq_range = &intersected_rule->freq_range; 7759c96477dSLuis R. Rodriguez 7769c96477dSLuis R. Rodriguez power_rule1 = &rule1->power_rule; 7779c96477dSLuis R. Rodriguez power_rule2 = &rule2->power_rule; 7789c96477dSLuis R. Rodriguez power_rule = &intersected_rule->power_rule; 7799c96477dSLuis R. Rodriguez 7809c96477dSLuis R. Rodriguez freq_range->start_freq_khz = max(freq_range1->start_freq_khz, 7819c96477dSLuis R. Rodriguez freq_range2->start_freq_khz); 7829c96477dSLuis R. Rodriguez freq_range->end_freq_khz = min(freq_range1->end_freq_khz, 7839c96477dSLuis R. Rodriguez freq_range2->end_freq_khz); 78497524820SJanusz Dziedzic 78597524820SJanusz Dziedzic max_bandwidth1 = freq_range1->max_bandwidth_khz; 78697524820SJanusz Dziedzic max_bandwidth2 = freq_range2->max_bandwidth_khz; 78797524820SJanusz Dziedzic 788b0dfd2eaSJanusz Dziedzic if (rule1->flags & NL80211_RRF_AUTO_BW) 78997524820SJanusz Dziedzic max_bandwidth1 = reg_get_max_bandwidth(rd1, rule1); 790b0dfd2eaSJanusz Dziedzic if (rule2->flags & NL80211_RRF_AUTO_BW) 79197524820SJanusz Dziedzic max_bandwidth2 = reg_get_max_bandwidth(rd2, rule2); 79297524820SJanusz Dziedzic 79397524820SJanusz Dziedzic freq_range->max_bandwidth_khz = min(max_bandwidth1, max_bandwidth2); 7949c96477dSLuis R. Rodriguez 795b0dfd2eaSJanusz Dziedzic intersected_rule->flags = rule1->flags | rule2->flags; 796b0dfd2eaSJanusz Dziedzic 797b0dfd2eaSJanusz Dziedzic /* 798b0dfd2eaSJanusz Dziedzic * In case NL80211_RRF_AUTO_BW requested for both rules 799b0dfd2eaSJanusz Dziedzic * set AUTO_BW in intersected rule also. Next we will 800b0dfd2eaSJanusz Dziedzic * calculate BW correctly in handle_channel function. 801b0dfd2eaSJanusz Dziedzic * In other case remove AUTO_BW flag while we calculate 802b0dfd2eaSJanusz Dziedzic * maximum bandwidth correctly and auto calculation is 803b0dfd2eaSJanusz Dziedzic * not required. 804b0dfd2eaSJanusz Dziedzic */ 805b0dfd2eaSJanusz Dziedzic if ((rule1->flags & NL80211_RRF_AUTO_BW) && 806b0dfd2eaSJanusz Dziedzic (rule2->flags & NL80211_RRF_AUTO_BW)) 807b0dfd2eaSJanusz Dziedzic intersected_rule->flags |= NL80211_RRF_AUTO_BW; 808b0dfd2eaSJanusz Dziedzic else 809b0dfd2eaSJanusz Dziedzic intersected_rule->flags &= ~NL80211_RRF_AUTO_BW; 810b0dfd2eaSJanusz Dziedzic 8119c96477dSLuis R. Rodriguez freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz; 8129c96477dSLuis R. Rodriguez if (freq_range->max_bandwidth_khz > freq_diff) 8139c96477dSLuis R. Rodriguez freq_range->max_bandwidth_khz = freq_diff; 8149c96477dSLuis R. Rodriguez 8159c96477dSLuis R. Rodriguez power_rule->max_eirp = min(power_rule1->max_eirp, 8169c96477dSLuis R. Rodriguez power_rule2->max_eirp); 8179c96477dSLuis R. Rodriguez power_rule->max_antenna_gain = min(power_rule1->max_antenna_gain, 8189c96477dSLuis R. Rodriguez power_rule2->max_antenna_gain); 8199c96477dSLuis R. Rodriguez 820089027e5SJanusz Dziedzic intersected_rule->dfs_cac_ms = max(rule1->dfs_cac_ms, 821089027e5SJanusz Dziedzic rule2->dfs_cac_ms); 822089027e5SJanusz Dziedzic 8239c96477dSLuis R. Rodriguez if (!is_valid_reg_rule(intersected_rule)) 8249c96477dSLuis R. Rodriguez return -EINVAL; 8259c96477dSLuis R. Rodriguez 8269c96477dSLuis R. Rodriguez return 0; 8279c96477dSLuis R. Rodriguez } 8289c96477dSLuis R. Rodriguez 829a62a1aedSEliad Peller /* check whether old rule contains new rule */ 830a62a1aedSEliad Peller static bool rule_contains(struct ieee80211_reg_rule *r1, 831a62a1aedSEliad Peller struct ieee80211_reg_rule *r2) 832a62a1aedSEliad Peller { 833a62a1aedSEliad Peller /* for simplicity, currently consider only same flags */ 834a62a1aedSEliad Peller if (r1->flags != r2->flags) 835a62a1aedSEliad Peller return false; 836a62a1aedSEliad Peller 837a62a1aedSEliad Peller /* verify r1 is more restrictive */ 838a62a1aedSEliad Peller if ((r1->power_rule.max_antenna_gain > 839a62a1aedSEliad Peller r2->power_rule.max_antenna_gain) || 840a62a1aedSEliad Peller r1->power_rule.max_eirp > r2->power_rule.max_eirp) 841a62a1aedSEliad Peller return false; 842a62a1aedSEliad Peller 843a62a1aedSEliad Peller /* make sure r2's range is contained within r1 */ 844a62a1aedSEliad Peller if (r1->freq_range.start_freq_khz > r2->freq_range.start_freq_khz || 845a62a1aedSEliad Peller r1->freq_range.end_freq_khz < r2->freq_range.end_freq_khz) 846a62a1aedSEliad Peller return false; 847a62a1aedSEliad Peller 848a62a1aedSEliad Peller /* and finally verify that r1.max_bw >= r2.max_bw */ 849a62a1aedSEliad Peller if (r1->freq_range.max_bandwidth_khz < 850a62a1aedSEliad Peller r2->freq_range.max_bandwidth_khz) 851a62a1aedSEliad Peller return false; 852a62a1aedSEliad Peller 853a62a1aedSEliad Peller return true; 854a62a1aedSEliad Peller } 855a62a1aedSEliad Peller 856a62a1aedSEliad Peller /* add or extend current rules. do nothing if rule is already contained */ 857a62a1aedSEliad Peller static void add_rule(struct ieee80211_reg_rule *rule, 858a62a1aedSEliad Peller struct ieee80211_reg_rule *reg_rules, u32 *n_rules) 859a62a1aedSEliad Peller { 860a62a1aedSEliad Peller struct ieee80211_reg_rule *tmp_rule; 861a62a1aedSEliad Peller int i; 862a62a1aedSEliad Peller 863a62a1aedSEliad Peller for (i = 0; i < *n_rules; i++) { 864a62a1aedSEliad Peller tmp_rule = ®_rules[i]; 865a62a1aedSEliad Peller /* rule is already contained - do nothing */ 866a62a1aedSEliad Peller if (rule_contains(tmp_rule, rule)) 867a62a1aedSEliad Peller return; 868a62a1aedSEliad Peller 869a62a1aedSEliad Peller /* extend rule if possible */ 870a62a1aedSEliad Peller if (rule_contains(rule, tmp_rule)) { 871a62a1aedSEliad Peller memcpy(tmp_rule, rule, sizeof(*rule)); 872a62a1aedSEliad Peller return; 873a62a1aedSEliad Peller } 874a62a1aedSEliad Peller } 875a62a1aedSEliad Peller 876a62a1aedSEliad Peller memcpy(®_rules[*n_rules], rule, sizeof(*rule)); 877a62a1aedSEliad Peller (*n_rules)++; 878a62a1aedSEliad Peller } 879a62a1aedSEliad Peller 8809c96477dSLuis R. Rodriguez /** 8819c96477dSLuis R. Rodriguez * regdom_intersect - do the intersection between two regulatory domains 8829c96477dSLuis R. Rodriguez * @rd1: first regulatory domain 8839c96477dSLuis R. Rodriguez * @rd2: second regulatory domain 8849c96477dSLuis R. Rodriguez * 8859c96477dSLuis R. Rodriguez * Use this function to get the intersection between two regulatory domains. 8869c96477dSLuis R. Rodriguez * Once completed we will mark the alpha2 for the rd as intersected, "98", 8879c96477dSLuis R. Rodriguez * as no one single alpha2 can represent this regulatory domain. 8889c96477dSLuis R. Rodriguez * 8899c96477dSLuis R. Rodriguez * Returns a pointer to the regulatory domain structure which will hold the 8909c96477dSLuis R. Rodriguez * resulting intersection of rules between rd1 and rd2. We will 8919c96477dSLuis R. Rodriguez * kzalloc() this structure for you. 8929c96477dSLuis R. Rodriguez */ 8931a919318SJohannes Berg static struct ieee80211_regdomain * 8941a919318SJohannes Berg regdom_intersect(const struct ieee80211_regdomain *rd1, 8959c96477dSLuis R. Rodriguez const struct ieee80211_regdomain *rd2) 8969c96477dSLuis R. Rodriguez { 8979c96477dSLuis R. Rodriguez int r, size_of_regd; 8989c96477dSLuis R. Rodriguez unsigned int x, y; 899a62a1aedSEliad Peller unsigned int num_rules = 0; 9009c96477dSLuis R. Rodriguez const struct ieee80211_reg_rule *rule1, *rule2; 901a62a1aedSEliad Peller struct ieee80211_reg_rule intersected_rule; 9029c96477dSLuis R. Rodriguez struct ieee80211_regdomain *rd; 9039c96477dSLuis R. Rodriguez 9049c96477dSLuis R. Rodriguez if (!rd1 || !rd2) 9059c96477dSLuis R. Rodriguez return NULL; 9069c96477dSLuis R. Rodriguez 907fb1fc7adSLuis R. Rodriguez /* 908fb1fc7adSLuis R. Rodriguez * First we get a count of the rules we'll need, then we actually 9099c96477dSLuis R. Rodriguez * build them. This is to so we can malloc() and free() a 9109c96477dSLuis R. Rodriguez * regdomain once. The reason we use reg_rules_intersect() here 9119c96477dSLuis R. Rodriguez * is it will return -EINVAL if the rule computed makes no sense. 912fb1fc7adSLuis R. Rodriguez * All rules that do check out OK are valid. 913fb1fc7adSLuis R. Rodriguez */ 9149c96477dSLuis R. Rodriguez 9159c96477dSLuis R. Rodriguez for (x = 0; x < rd1->n_reg_rules; x++) { 9169c96477dSLuis R. Rodriguez rule1 = &rd1->reg_rules[x]; 9179c96477dSLuis R. Rodriguez for (y = 0; y < rd2->n_reg_rules; y++) { 9189c96477dSLuis R. Rodriguez rule2 = &rd2->reg_rules[y]; 91997524820SJanusz Dziedzic if (!reg_rules_intersect(rd1, rd2, rule1, rule2, 920a62a1aedSEliad Peller &intersected_rule)) 9219c96477dSLuis R. Rodriguez num_rules++; 9229c96477dSLuis R. Rodriguez } 9239c96477dSLuis R. Rodriguez } 9249c96477dSLuis R. Rodriguez 9259c96477dSLuis R. Rodriguez if (!num_rules) 9269c96477dSLuis R. Rodriguez return NULL; 9279c96477dSLuis R. Rodriguez 9289c96477dSLuis R. Rodriguez size_of_regd = sizeof(struct ieee80211_regdomain) + 92982f20856SJohannes Berg num_rules * sizeof(struct ieee80211_reg_rule); 9309c96477dSLuis R. Rodriguez 9319c96477dSLuis R. Rodriguez rd = kzalloc(size_of_regd, GFP_KERNEL); 9329c96477dSLuis R. Rodriguez if (!rd) 9339c96477dSLuis R. Rodriguez return NULL; 9349c96477dSLuis R. Rodriguez 935a62a1aedSEliad Peller for (x = 0; x < rd1->n_reg_rules; x++) { 9369c96477dSLuis R. Rodriguez rule1 = &rd1->reg_rules[x]; 937a62a1aedSEliad Peller for (y = 0; y < rd2->n_reg_rules; y++) { 9389c96477dSLuis R. Rodriguez rule2 = &rd2->reg_rules[y]; 93997524820SJanusz Dziedzic r = reg_rules_intersect(rd1, rd2, rule1, rule2, 940a62a1aedSEliad Peller &intersected_rule); 941fb1fc7adSLuis R. Rodriguez /* 942fb1fc7adSLuis R. Rodriguez * No need to memset here the intersected rule here as 943fb1fc7adSLuis R. Rodriguez * we're not using the stack anymore 944fb1fc7adSLuis R. Rodriguez */ 9459c96477dSLuis R. Rodriguez if (r) 9469c96477dSLuis R. Rodriguez continue; 947a62a1aedSEliad Peller 948a62a1aedSEliad Peller add_rule(&intersected_rule, rd->reg_rules, 949a62a1aedSEliad Peller &rd->n_reg_rules); 9509c96477dSLuis R. Rodriguez } 9519c96477dSLuis R. Rodriguez } 9529c96477dSLuis R. Rodriguez 9539c96477dSLuis R. Rodriguez rd->alpha2[0] = '9'; 9549c96477dSLuis R. Rodriguez rd->alpha2[1] = '8'; 955adbfb058SLuis R. Rodriguez rd->dfs_region = reg_intersect_dfs_region(rd1->dfs_region, 956adbfb058SLuis R. Rodriguez rd2->dfs_region); 9579c96477dSLuis R. Rodriguez 9589c96477dSLuis R. Rodriguez return rd; 9599c96477dSLuis R. Rodriguez } 9609c96477dSLuis R. Rodriguez 961fb1fc7adSLuis R. Rodriguez /* 962fb1fc7adSLuis R. Rodriguez * XXX: add support for the rest of enum nl80211_reg_rule_flags, we may 963fb1fc7adSLuis R. Rodriguez * want to just have the channel structure use these 964fb1fc7adSLuis R. Rodriguez */ 965b2e1b302SLuis R. Rodriguez static u32 map_regdom_flags(u32 rd_flags) 966b2e1b302SLuis R. Rodriguez { 967b2e1b302SLuis R. Rodriguez u32 channel_flags = 0; 9688fe02e16SLuis R. Rodriguez if (rd_flags & NL80211_RRF_NO_IR_ALL) 9698fe02e16SLuis R. Rodriguez channel_flags |= IEEE80211_CHAN_NO_IR; 970b2e1b302SLuis R. Rodriguez if (rd_flags & NL80211_RRF_DFS) 971b2e1b302SLuis R. Rodriguez channel_flags |= IEEE80211_CHAN_RADAR; 97203f6b084SSeth Forshee if (rd_flags & NL80211_RRF_NO_OFDM) 97303f6b084SSeth Forshee channel_flags |= IEEE80211_CHAN_NO_OFDM; 974570dbde1SDavid Spinadel if (rd_flags & NL80211_RRF_NO_OUTDOOR) 975570dbde1SDavid Spinadel channel_flags |= IEEE80211_CHAN_INDOOR_ONLY; 976a6d4a534SArik Nemtsov if (rd_flags & NL80211_RRF_GO_CONCURRENT) 977a6d4a534SArik Nemtsov channel_flags |= IEEE80211_CHAN_GO_CONCURRENT; 978a6d4a534SArik Nemtsov if (rd_flags & NL80211_RRF_NO_HT40MINUS) 979a6d4a534SArik Nemtsov channel_flags |= IEEE80211_CHAN_NO_HT40MINUS; 980a6d4a534SArik Nemtsov if (rd_flags & NL80211_RRF_NO_HT40PLUS) 981a6d4a534SArik Nemtsov channel_flags |= IEEE80211_CHAN_NO_HT40PLUS; 982a6d4a534SArik Nemtsov if (rd_flags & NL80211_RRF_NO_80MHZ) 983a6d4a534SArik Nemtsov channel_flags |= IEEE80211_CHAN_NO_80MHZ; 984a6d4a534SArik Nemtsov if (rd_flags & NL80211_RRF_NO_160MHZ) 985a6d4a534SArik Nemtsov channel_flags |= IEEE80211_CHAN_NO_160MHZ; 986b2e1b302SLuis R. Rodriguez return channel_flags; 987b2e1b302SLuis R. Rodriguez } 988b2e1b302SLuis R. Rodriguez 989361c9c8bSJohannes Berg static const struct ieee80211_reg_rule * 990361c9c8bSJohannes Berg freq_reg_info_regd(struct wiphy *wiphy, u32 center_freq, 9915d885b99SJohannes Berg const struct ieee80211_regdomain *regd) 9928318d78aSJohannes Berg { 9938318d78aSJohannes Berg int i; 9940c7dc45dSLuis R. Rodriguez bool band_rule_found = false; 995038659e7SLuis R. Rodriguez bool bw_fits = false; 996038659e7SLuis R. Rodriguez 9973e0c3ff3SLuis R. Rodriguez if (!regd) 998361c9c8bSJohannes Berg return ERR_PTR(-EINVAL); 999b2e1b302SLuis R. Rodriguez 10003e0c3ff3SLuis R. Rodriguez for (i = 0; i < regd->n_reg_rules; i++) { 1001b2e1b302SLuis R. Rodriguez const struct ieee80211_reg_rule *rr; 1002b2e1b302SLuis R. Rodriguez const struct ieee80211_freq_range *fr = NULL; 1003b2e1b302SLuis R. Rodriguez 10043e0c3ff3SLuis R. Rodriguez rr = ®d->reg_rules[i]; 1005b2e1b302SLuis R. Rodriguez fr = &rr->freq_range; 10060c7dc45dSLuis R. Rodriguez 1007fb1fc7adSLuis R. Rodriguez /* 1008fb1fc7adSLuis R. Rodriguez * We only need to know if one frequency rule was 10090c7dc45dSLuis R. Rodriguez * was in center_freq's band, that's enough, so lets 1010fb1fc7adSLuis R. Rodriguez * not overwrite it once found 1011fb1fc7adSLuis R. Rodriguez */ 10120c7dc45dSLuis R. Rodriguez if (!band_rule_found) 10130c7dc45dSLuis R. Rodriguez band_rule_found = freq_in_rule_band(fr, center_freq); 10140c7dc45dSLuis R. Rodriguez 1015e33e2241SJohannes Berg bw_fits = reg_does_bw_fit(fr, center_freq, MHZ_TO_KHZ(20)); 10160c7dc45dSLuis R. Rodriguez 1017361c9c8bSJohannes Berg if (band_rule_found && bw_fits) 1018361c9c8bSJohannes Berg return rr; 10198318d78aSJohannes Berg } 10208318d78aSJohannes Berg 10210c7dc45dSLuis R. Rodriguez if (!band_rule_found) 1022361c9c8bSJohannes Berg return ERR_PTR(-ERANGE); 10230c7dc45dSLuis R. Rodriguez 1024361c9c8bSJohannes Berg return ERR_PTR(-EINVAL); 1025b2e1b302SLuis R. Rodriguez } 1026b2e1b302SLuis R. Rodriguez 1027361c9c8bSJohannes Berg const struct ieee80211_reg_rule *freq_reg_info(struct wiphy *wiphy, 1028361c9c8bSJohannes Berg u32 center_freq) 10291fa25e41SLuis R. Rodriguez { 10305d885b99SJohannes Berg const struct ieee80211_regdomain *regd; 10311a919318SJohannes Berg 1032e3961af1SJanusz Dziedzic regd = reg_get_regdomain(wiphy); 10335d885b99SJohannes Berg 1034361c9c8bSJohannes Berg return freq_reg_info_regd(wiphy, center_freq, regd); 10351fa25e41SLuis R. Rodriguez } 10364f366c5dSJohn W. Linville EXPORT_SYMBOL(freq_reg_info); 1037b2e1b302SLuis R. Rodriguez 1038034c6d6eSLuis R. Rodriguez const char *reg_initiator_name(enum nl80211_reg_initiator initiator) 1039926a0a09SLuis R. Rodriguez { 1040926a0a09SLuis R. Rodriguez switch (initiator) { 1041926a0a09SLuis R. Rodriguez case NL80211_REGDOM_SET_BY_CORE: 1042034c6d6eSLuis R. Rodriguez return "core"; 1043926a0a09SLuis R. Rodriguez case NL80211_REGDOM_SET_BY_USER: 1044034c6d6eSLuis R. Rodriguez return "user"; 1045926a0a09SLuis R. Rodriguez case NL80211_REGDOM_SET_BY_DRIVER: 1046034c6d6eSLuis R. Rodriguez return "driver"; 1047926a0a09SLuis R. Rodriguez case NL80211_REGDOM_SET_BY_COUNTRY_IE: 1048034c6d6eSLuis R. Rodriguez return "country IE"; 1049926a0a09SLuis R. Rodriguez default: 1050926a0a09SLuis R. Rodriguez WARN_ON(1); 1051034c6d6eSLuis R. Rodriguez return "bug"; 1052926a0a09SLuis R. Rodriguez } 1053926a0a09SLuis R. Rodriguez } 1054034c6d6eSLuis R. Rodriguez EXPORT_SYMBOL(reg_initiator_name); 1055e702d3cfSLuis R. Rodriguez 1056034c6d6eSLuis R. Rodriguez #ifdef CONFIG_CFG80211_REG_DEBUG 1057b0dfd2eaSJanusz Dziedzic static void chan_reg_rule_print_dbg(const struct ieee80211_regdomain *regd, 1058b0dfd2eaSJanusz Dziedzic struct ieee80211_channel *chan, 1059e702d3cfSLuis R. Rodriguez const struct ieee80211_reg_rule *reg_rule) 1060e702d3cfSLuis R. Rodriguez { 1061e702d3cfSLuis R. Rodriguez const struct ieee80211_power_rule *power_rule; 1062e702d3cfSLuis R. Rodriguez const struct ieee80211_freq_range *freq_range; 1063b0dfd2eaSJanusz Dziedzic char max_antenna_gain[32], bw[32]; 1064e702d3cfSLuis R. Rodriguez 1065e702d3cfSLuis R. Rodriguez power_rule = ®_rule->power_rule; 1066e702d3cfSLuis R. Rodriguez freq_range = ®_rule->freq_range; 1067e702d3cfSLuis R. Rodriguez 1068e702d3cfSLuis R. Rodriguez if (!power_rule->max_antenna_gain) 1069b0dfd2eaSJanusz Dziedzic snprintf(max_antenna_gain, sizeof(max_antenna_gain), "N/A"); 1070e702d3cfSLuis R. Rodriguez else 1071b0dfd2eaSJanusz Dziedzic snprintf(max_antenna_gain, sizeof(max_antenna_gain), "%d", 1072b0dfd2eaSJanusz Dziedzic power_rule->max_antenna_gain); 1073b0dfd2eaSJanusz Dziedzic 1074b0dfd2eaSJanusz Dziedzic if (reg_rule->flags & NL80211_RRF_AUTO_BW) 1075b0dfd2eaSJanusz Dziedzic snprintf(bw, sizeof(bw), "%d KHz, %d KHz AUTO", 1076b0dfd2eaSJanusz Dziedzic freq_range->max_bandwidth_khz, 1077b0dfd2eaSJanusz Dziedzic reg_get_max_bandwidth(regd, reg_rule)); 1078b0dfd2eaSJanusz Dziedzic else 1079b0dfd2eaSJanusz Dziedzic snprintf(bw, sizeof(bw), "%d KHz", 1080b0dfd2eaSJanusz Dziedzic freq_range->max_bandwidth_khz); 1081e702d3cfSLuis R. Rodriguez 1082fe7ef5e9SJohannes Berg REG_DBG_PRINT("Updating information on frequency %d MHz with regulatory rule:\n", 1083fe7ef5e9SJohannes Berg chan->center_freq); 1084e702d3cfSLuis R. Rodriguez 1085b0dfd2eaSJanusz Dziedzic REG_DBG_PRINT("%d KHz - %d KHz @ %s), (%s mBi, %d mBm)\n", 10861a919318SJohannes Berg freq_range->start_freq_khz, freq_range->end_freq_khz, 1087b0dfd2eaSJanusz Dziedzic bw, max_antenna_gain, 1088e702d3cfSLuis R. Rodriguez power_rule->max_eirp); 1089e702d3cfSLuis R. Rodriguez } 1090e702d3cfSLuis R. Rodriguez #else 1091b0dfd2eaSJanusz Dziedzic static void chan_reg_rule_print_dbg(const struct ieee80211_regdomain *regd, 1092b0dfd2eaSJanusz Dziedzic struct ieee80211_channel *chan, 1093e702d3cfSLuis R. Rodriguez const struct ieee80211_reg_rule *reg_rule) 1094e702d3cfSLuis R. Rodriguez { 1095e702d3cfSLuis R. Rodriguez return; 1096e702d3cfSLuis R. Rodriguez } 1097926a0a09SLuis R. Rodriguez #endif 1098926a0a09SLuis R. Rodriguez 1099e33e2241SJohannes Berg /* 1100e33e2241SJohannes Berg * Note that right now we assume the desired channel bandwidth 1101e33e2241SJohannes Berg * is always 20 MHz for each individual channel (HT40 uses 20 MHz 1102e33e2241SJohannes Berg * per channel, the primary and the extension channel). 1103038659e7SLuis R. Rodriguez */ 11047ca43d03SLuis R. Rodriguez static void handle_channel(struct wiphy *wiphy, 11057ca43d03SLuis R. Rodriguez enum nl80211_reg_initiator initiator, 1106fdc9d7b2SJohannes Berg struct ieee80211_channel *chan) 1107b2e1b302SLuis R. Rodriguez { 1108038659e7SLuis R. Rodriguez u32 flags, bw_flags = 0; 1109b2e1b302SLuis R. Rodriguez const struct ieee80211_reg_rule *reg_rule = NULL; 1110b2e1b302SLuis R. Rodriguez const struct ieee80211_power_rule *power_rule = NULL; 1111038659e7SLuis R. Rodriguez const struct ieee80211_freq_range *freq_range = NULL; 1112fe33eb39SLuis R. Rodriguez struct wiphy *request_wiphy = NULL; 1113c492db37SJohannes Berg struct regulatory_request *lr = get_last_request(); 111497524820SJanusz Dziedzic const struct ieee80211_regdomain *regd; 111597524820SJanusz Dziedzic u32 max_bandwidth_khz; 1116a92a3ce7SLuis R. Rodriguez 1117c492db37SJohannes Berg request_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx); 1118a92a3ce7SLuis R. Rodriguez 1119a92a3ce7SLuis R. Rodriguez flags = chan->orig_flags; 1120b2e1b302SLuis R. Rodriguez 1121361c9c8bSJohannes Berg reg_rule = freq_reg_info(wiphy, MHZ_TO_KHZ(chan->center_freq)); 1122361c9c8bSJohannes Berg if (IS_ERR(reg_rule)) { 1123ca4ffe8fSLuis R. Rodriguez /* 1124ca4ffe8fSLuis R. Rodriguez * We will disable all channels that do not match our 112525985edcSLucas De Marchi * received regulatory rule unless the hint is coming 1126ca4ffe8fSLuis R. Rodriguez * from a Country IE and the Country IE had no information 1127ca4ffe8fSLuis R. Rodriguez * about a band. The IEEE 802.11 spec allows for an AP 1128ca4ffe8fSLuis R. Rodriguez * to send only a subset of the regulatory rules allowed, 1129ca4ffe8fSLuis R. Rodriguez * so an AP in the US that only supports 2.4 GHz may only send 1130ca4ffe8fSLuis R. Rodriguez * a country IE with information for the 2.4 GHz band 1131ca4ffe8fSLuis R. Rodriguez * while 5 GHz is still supported. 1132ca4ffe8fSLuis R. Rodriguez */ 1133ca4ffe8fSLuis R. Rodriguez if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE && 1134361c9c8bSJohannes Berg PTR_ERR(reg_rule) == -ERANGE) 11358318d78aSJohannes Berg return; 11368318d78aSJohannes Berg 1137cc493e4fSLuis R. Rodriguez if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER && 1138cc493e4fSLuis R. Rodriguez request_wiphy && request_wiphy == wiphy && 1139a2f73b6cSLuis R. Rodriguez request_wiphy->regulatory_flags & REGULATORY_STRICT_REG) { 1140cc493e4fSLuis R. Rodriguez REG_DBG_PRINT("Disabling freq %d MHz for good\n", 1141cc493e4fSLuis R. Rodriguez chan->center_freq); 1142cc493e4fSLuis R. Rodriguez chan->orig_flags |= IEEE80211_CHAN_DISABLED; 1143cc493e4fSLuis R. Rodriguez chan->flags = chan->orig_flags; 1144cc493e4fSLuis R. Rodriguez } else { 1145cc493e4fSLuis R. Rodriguez REG_DBG_PRINT("Disabling freq %d MHz\n", 1146cc493e4fSLuis R. Rodriguez chan->center_freq); 1147990de49fSJohannes Berg chan->flags |= IEEE80211_CHAN_DISABLED; 1148cc493e4fSLuis R. Rodriguez } 1149ca4ffe8fSLuis R. Rodriguez return; 1150ca4ffe8fSLuis R. Rodriguez } 1151ca4ffe8fSLuis R. Rodriguez 1152b0dfd2eaSJanusz Dziedzic regd = reg_get_regdomain(wiphy); 1153b0dfd2eaSJanusz Dziedzic chan_reg_rule_print_dbg(regd, chan, reg_rule); 1154e702d3cfSLuis R. Rodriguez 1155b2e1b302SLuis R. Rodriguez power_rule = ®_rule->power_rule; 1156038659e7SLuis R. Rodriguez freq_range = ®_rule->freq_range; 1157038659e7SLuis R. Rodriguez 115897524820SJanusz Dziedzic max_bandwidth_khz = freq_range->max_bandwidth_khz; 115997524820SJanusz Dziedzic /* Check if auto calculation requested */ 1160b0dfd2eaSJanusz Dziedzic if (reg_rule->flags & NL80211_RRF_AUTO_BW) 116197524820SJanusz Dziedzic max_bandwidth_khz = reg_get_max_bandwidth(regd, reg_rule); 116297524820SJanusz Dziedzic 116397524820SJanusz Dziedzic if (max_bandwidth_khz < MHZ_TO_KHZ(40)) 1164e33e2241SJohannes Berg bw_flags = IEEE80211_CHAN_NO_HT40; 116597524820SJanusz Dziedzic if (max_bandwidth_khz < MHZ_TO_KHZ(80)) 1166c7a6ee27SJohannes Berg bw_flags |= IEEE80211_CHAN_NO_80MHZ; 116797524820SJanusz Dziedzic if (max_bandwidth_khz < MHZ_TO_KHZ(160)) 1168c7a6ee27SJohannes Berg bw_flags |= IEEE80211_CHAN_NO_160MHZ; 1169b2e1b302SLuis R. Rodriguez 1170c492db37SJohannes Berg if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER && 1171806a9e39SLuis R. Rodriguez request_wiphy && request_wiphy == wiphy && 1172a2f73b6cSLuis R. Rodriguez request_wiphy->regulatory_flags & REGULATORY_STRICT_REG) { 1173fb1fc7adSLuis R. Rodriguez /* 117425985edcSLucas De Marchi * This guarantees the driver's requested regulatory domain 1175f976376dSLuis R. Rodriguez * will always be used as a base for further regulatory 1176fb1fc7adSLuis R. Rodriguez * settings 1177fb1fc7adSLuis R. Rodriguez */ 1178f976376dSLuis R. Rodriguez chan->flags = chan->orig_flags = 1179038659e7SLuis R. Rodriguez map_regdom_flags(reg_rule->flags) | bw_flags; 1180f976376dSLuis R. Rodriguez chan->max_antenna_gain = chan->orig_mag = 1181f976376dSLuis R. Rodriguez (int) MBI_TO_DBI(power_rule->max_antenna_gain); 1182279f0f55SFelix Fietkau chan->max_reg_power = chan->max_power = chan->orig_mpwr = 1183f976376dSLuis R. Rodriguez (int) MBM_TO_DBM(power_rule->max_eirp); 11844f267c11SJanusz Dziedzic 11854f267c11SJanusz Dziedzic if (chan->flags & IEEE80211_CHAN_RADAR) { 11864f267c11SJanusz Dziedzic chan->dfs_cac_ms = IEEE80211_DFS_MIN_CAC_TIME_MS; 11874f267c11SJanusz Dziedzic if (reg_rule->dfs_cac_ms) 11884f267c11SJanusz Dziedzic chan->dfs_cac_ms = reg_rule->dfs_cac_ms; 11894f267c11SJanusz Dziedzic } 11904f267c11SJanusz Dziedzic 1191f976376dSLuis R. Rodriguez return; 1192f976376dSLuis R. Rodriguez } 1193f976376dSLuis R. Rodriguez 119404f39047SSimon Wunderlich chan->dfs_state = NL80211_DFS_USABLE; 119504f39047SSimon Wunderlich chan->dfs_state_entered = jiffies; 119604f39047SSimon Wunderlich 1197aa3d7eefSRajkumar Manoharan chan->beacon_found = false; 1198038659e7SLuis R. Rodriguez chan->flags = flags | bw_flags | map_regdom_flags(reg_rule->flags); 11991a919318SJohannes Berg chan->max_antenna_gain = 12001a919318SJohannes Berg min_t(int, chan->orig_mag, 12011a919318SJohannes Berg MBI_TO_DBI(power_rule->max_antenna_gain)); 1202eccc068eSHong Wu chan->max_reg_power = (int) MBM_TO_DBM(power_rule->max_eirp); 1203089027e5SJanusz Dziedzic 1204089027e5SJanusz Dziedzic if (chan->flags & IEEE80211_CHAN_RADAR) { 1205089027e5SJanusz Dziedzic if (reg_rule->dfs_cac_ms) 1206089027e5SJanusz Dziedzic chan->dfs_cac_ms = reg_rule->dfs_cac_ms; 1207089027e5SJanusz Dziedzic else 1208089027e5SJanusz Dziedzic chan->dfs_cac_ms = IEEE80211_DFS_MIN_CAC_TIME_MS; 1209089027e5SJanusz Dziedzic } 1210089027e5SJanusz Dziedzic 12115e31fc08SStanislaw Gruszka if (chan->orig_mpwr) { 12125e31fc08SStanislaw Gruszka /* 1213a09a85a0SLuis R. Rodriguez * Devices that use REGULATORY_COUNTRY_IE_FOLLOW_POWER 1214a09a85a0SLuis R. Rodriguez * will always follow the passed country IE power settings. 12155e31fc08SStanislaw Gruszka */ 12165e31fc08SStanislaw Gruszka if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE && 1217a09a85a0SLuis R. Rodriguez wiphy->regulatory_flags & REGULATORY_COUNTRY_IE_FOLLOW_POWER) 12185e31fc08SStanislaw Gruszka chan->max_power = chan->max_reg_power; 12195e31fc08SStanislaw Gruszka else 12205e31fc08SStanislaw Gruszka chan->max_power = min(chan->orig_mpwr, 12215e31fc08SStanislaw Gruszka chan->max_reg_power); 12225e31fc08SStanislaw Gruszka } else 12235e31fc08SStanislaw Gruszka chan->max_power = chan->max_reg_power; 12248318d78aSJohannes Berg } 12258318d78aSJohannes Berg 12267ca43d03SLuis R. Rodriguez static void handle_band(struct wiphy *wiphy, 1227fdc9d7b2SJohannes Berg enum nl80211_reg_initiator initiator, 1228fdc9d7b2SJohannes Berg struct ieee80211_supported_band *sband) 12298318d78aSJohannes Berg { 1230a92a3ce7SLuis R. Rodriguez unsigned int i; 1231a92a3ce7SLuis R. Rodriguez 1232fdc9d7b2SJohannes Berg if (!sband) 1233fdc9d7b2SJohannes Berg return; 12348318d78aSJohannes Berg 12358318d78aSJohannes Berg for (i = 0; i < sband->n_channels; i++) 1236fdc9d7b2SJohannes Berg handle_channel(wiphy, initiator, &sband->channels[i]); 12378318d78aSJohannes Berg } 12388318d78aSJohannes Berg 123957b5ce07SLuis R. Rodriguez static bool reg_request_cell_base(struct regulatory_request *request) 124057b5ce07SLuis R. Rodriguez { 124157b5ce07SLuis R. Rodriguez if (request->initiator != NL80211_REGDOM_SET_BY_USER) 124257b5ce07SLuis R. Rodriguez return false; 12431a919318SJohannes Berg return request->user_reg_hint_type == NL80211_USER_REG_HINT_CELL_BASE; 124457b5ce07SLuis R. Rodriguez } 124557b5ce07SLuis R. Rodriguez 124657b5ce07SLuis R. Rodriguez bool reg_last_request_cell_base(void) 124757b5ce07SLuis R. Rodriguez { 124838fd2143SJohannes Berg return reg_request_cell_base(get_last_request()); 124957b5ce07SLuis R. Rodriguez } 125057b5ce07SLuis R. Rodriguez 125194fc661fSIlan Peer #ifdef CONFIG_CFG80211_REG_CELLULAR_HINTS 125257b5ce07SLuis R. Rodriguez /* Core specific check */ 12532f92212bSJohannes Berg static enum reg_request_treatment 12542f92212bSJohannes Berg reg_ignore_cell_hint(struct regulatory_request *pending_request) 125557b5ce07SLuis R. Rodriguez { 1256c492db37SJohannes Berg struct regulatory_request *lr = get_last_request(); 125757b5ce07SLuis R. Rodriguez 125857b5ce07SLuis R. Rodriguez if (!reg_num_devs_support_basehint) 12592f92212bSJohannes Berg return REG_REQ_IGNORE; 126057b5ce07SLuis R. Rodriguez 1261c492db37SJohannes Berg if (reg_request_cell_base(lr) && 12621a919318SJohannes Berg !regdom_changes(pending_request->alpha2)) 12632f92212bSJohannes Berg return REG_REQ_ALREADY_SET; 12641a919318SJohannes Berg 12652f92212bSJohannes Berg return REG_REQ_OK; 126657b5ce07SLuis R. Rodriguez } 126757b5ce07SLuis R. Rodriguez 126857b5ce07SLuis R. Rodriguez /* Device specific check */ 126957b5ce07SLuis R. Rodriguez static bool reg_dev_ignore_cell_hint(struct wiphy *wiphy) 127057b5ce07SLuis R. Rodriguez { 12711a919318SJohannes Berg return !(wiphy->features & NL80211_FEATURE_CELL_BASE_REG_HINTS); 127257b5ce07SLuis R. Rodriguez } 127357b5ce07SLuis R. Rodriguez #else 127457b5ce07SLuis R. Rodriguez static int reg_ignore_cell_hint(struct regulatory_request *pending_request) 127557b5ce07SLuis R. Rodriguez { 12762f92212bSJohannes Berg return REG_REQ_IGNORE; 127757b5ce07SLuis R. Rodriguez } 12781a919318SJohannes Berg 12791a919318SJohannes Berg static bool reg_dev_ignore_cell_hint(struct wiphy *wiphy) 128057b5ce07SLuis R. Rodriguez { 128157b5ce07SLuis R. Rodriguez return true; 128257b5ce07SLuis R. Rodriguez } 128357b5ce07SLuis R. Rodriguez #endif 128457b5ce07SLuis R. Rodriguez 1285fa1fb9cbSLuis R. Rodriguez static bool wiphy_strict_alpha2_regd(struct wiphy *wiphy) 1286fa1fb9cbSLuis R. Rodriguez { 1287a2f73b6cSLuis R. Rodriguez if (wiphy->regulatory_flags & REGULATORY_STRICT_REG && 1288a2f73b6cSLuis R. Rodriguez !(wiphy->regulatory_flags & REGULATORY_CUSTOM_REG)) 1289fa1fb9cbSLuis R. Rodriguez return true; 1290fa1fb9cbSLuis R. Rodriguez return false; 1291fa1fb9cbSLuis R. Rodriguez } 129257b5ce07SLuis R. Rodriguez 12937db90f4aSLuis R. Rodriguez static bool ignore_reg_update(struct wiphy *wiphy, 12947db90f4aSLuis R. Rodriguez enum nl80211_reg_initiator initiator) 129514b9815aSLuis R. Rodriguez { 1296c492db37SJohannes Berg struct regulatory_request *lr = get_last_request(); 1297c492db37SJohannes Berg 1298b0d7aa59SJonathan Doron if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) 1299b0d7aa59SJonathan Doron return true; 1300b0d7aa59SJonathan Doron 1301c492db37SJohannes Berg if (!lr) { 1302034c6d6eSLuis R. Rodriguez REG_DBG_PRINT("Ignoring regulatory request set by %s " 1303034c6d6eSLuis R. Rodriguez "since last_request is not set\n", 1304926a0a09SLuis R. Rodriguez reg_initiator_name(initiator)); 130514b9815aSLuis R. Rodriguez return true; 1306926a0a09SLuis R. Rodriguez } 1307926a0a09SLuis R. Rodriguez 13087db90f4aSLuis R. Rodriguez if (initiator == NL80211_REGDOM_SET_BY_CORE && 1309a2f73b6cSLuis R. Rodriguez wiphy->regulatory_flags & REGULATORY_CUSTOM_REG) { 1310034c6d6eSLuis R. Rodriguez REG_DBG_PRINT("Ignoring regulatory request set by %s " 1311034c6d6eSLuis R. Rodriguez "since the driver uses its own custom " 1312034c6d6eSLuis R. Rodriguez "regulatory domain\n", 1313926a0a09SLuis R. Rodriguez reg_initiator_name(initiator)); 131414b9815aSLuis R. Rodriguez return true; 1315926a0a09SLuis R. Rodriguez } 1316926a0a09SLuis R. Rodriguez 1317fb1fc7adSLuis R. Rodriguez /* 1318fb1fc7adSLuis R. Rodriguez * wiphy->regd will be set once the device has its own 1319fb1fc7adSLuis R. Rodriguez * desired regulatory domain set 1320fb1fc7adSLuis R. Rodriguez */ 1321fa1fb9cbSLuis R. Rodriguez if (wiphy_strict_alpha2_regd(wiphy) && !wiphy->regd && 1322749b527bSLuis R. Rodriguez initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && 1323c492db37SJohannes Berg !is_world_regdom(lr->alpha2)) { 1324034c6d6eSLuis R. Rodriguez REG_DBG_PRINT("Ignoring regulatory request set by %s " 1325034c6d6eSLuis R. Rodriguez "since the driver requires its own regulatory " 1326034c6d6eSLuis R. Rodriguez "domain to be set first\n", 1327926a0a09SLuis R. Rodriguez reg_initiator_name(initiator)); 132814b9815aSLuis R. Rodriguez return true; 1329926a0a09SLuis R. Rodriguez } 1330926a0a09SLuis R. Rodriguez 1331c492db37SJohannes Berg if (reg_request_cell_base(lr)) 133257b5ce07SLuis R. Rodriguez return reg_dev_ignore_cell_hint(wiphy); 133357b5ce07SLuis R. Rodriguez 133414b9815aSLuis R. Rodriguez return false; 133514b9815aSLuis R. Rodriguez } 133614b9815aSLuis R. Rodriguez 13373195e489SLuis R. Rodriguez static bool reg_is_world_roaming(struct wiphy *wiphy) 13383195e489SLuis R. Rodriguez { 13393195e489SLuis R. Rodriguez const struct ieee80211_regdomain *cr = get_cfg80211_regdom(); 13403195e489SLuis R. Rodriguez const struct ieee80211_regdomain *wr = get_wiphy_regdom(wiphy); 13413195e489SLuis R. Rodriguez struct regulatory_request *lr = get_last_request(); 13423195e489SLuis R. Rodriguez 13433195e489SLuis R. Rodriguez if (is_world_regdom(cr->alpha2) || (wr && is_world_regdom(wr->alpha2))) 13443195e489SLuis R. Rodriguez return true; 13453195e489SLuis R. Rodriguez 13463195e489SLuis R. Rodriguez if (lr && lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && 1347a2f73b6cSLuis R. Rodriguez wiphy->regulatory_flags & REGULATORY_CUSTOM_REG) 13483195e489SLuis R. Rodriguez return true; 13493195e489SLuis R. Rodriguez 13503195e489SLuis R. Rodriguez return false; 13513195e489SLuis R. Rodriguez } 13523195e489SLuis R. Rodriguez 13531a919318SJohannes Berg static void handle_reg_beacon(struct wiphy *wiphy, unsigned int chan_idx, 1354e38f8a7aSLuis R. Rodriguez struct reg_beacon *reg_beacon) 1355e38f8a7aSLuis R. Rodriguez { 1356e38f8a7aSLuis R. Rodriguez struct ieee80211_supported_band *sband; 1357e38f8a7aSLuis R. Rodriguez struct ieee80211_channel *chan; 13586bad8766SLuis R. Rodriguez bool channel_changed = false; 13596bad8766SLuis R. Rodriguez struct ieee80211_channel chan_before; 1360e38f8a7aSLuis R. Rodriguez 1361e38f8a7aSLuis R. Rodriguez sband = wiphy->bands[reg_beacon->chan.band]; 1362e38f8a7aSLuis R. Rodriguez chan = &sband->channels[chan_idx]; 1363e38f8a7aSLuis R. Rodriguez 1364e38f8a7aSLuis R. Rodriguez if (likely(chan->center_freq != reg_beacon->chan.center_freq)) 1365e38f8a7aSLuis R. Rodriguez return; 1366e38f8a7aSLuis R. Rodriguez 13676bad8766SLuis R. Rodriguez if (chan->beacon_found) 13686bad8766SLuis R. Rodriguez return; 13696bad8766SLuis R. Rodriguez 13706bad8766SLuis R. Rodriguez chan->beacon_found = true; 13716bad8766SLuis R. Rodriguez 13720f500a5fSLuis R. Rodriguez if (!reg_is_world_roaming(wiphy)) 13730f500a5fSLuis R. Rodriguez return; 13740f500a5fSLuis R. Rodriguez 1375a2f73b6cSLuis R. Rodriguez if (wiphy->regulatory_flags & REGULATORY_DISABLE_BEACON_HINTS) 137637184244SLuis R. Rodriguez return; 137737184244SLuis R. Rodriguez 13786bad8766SLuis R. Rodriguez chan_before.center_freq = chan->center_freq; 13796bad8766SLuis R. Rodriguez chan_before.flags = chan->flags; 13806bad8766SLuis R. Rodriguez 13818fe02e16SLuis R. Rodriguez if (chan->flags & IEEE80211_CHAN_NO_IR) { 13828fe02e16SLuis R. Rodriguez chan->flags &= ~IEEE80211_CHAN_NO_IR; 13836bad8766SLuis R. Rodriguez channel_changed = true; 1384e38f8a7aSLuis R. Rodriguez } 1385e38f8a7aSLuis R. Rodriguez 13866bad8766SLuis R. Rodriguez if (channel_changed) 13876bad8766SLuis R. Rodriguez nl80211_send_beacon_hint_event(wiphy, &chan_before, chan); 1388e38f8a7aSLuis R. Rodriguez } 1389e38f8a7aSLuis R. Rodriguez 1390e38f8a7aSLuis R. Rodriguez /* 1391e38f8a7aSLuis R. Rodriguez * Called when a scan on a wiphy finds a beacon on 1392e38f8a7aSLuis R. Rodriguez * new channel 1393e38f8a7aSLuis R. Rodriguez */ 1394e38f8a7aSLuis R. Rodriguez static void wiphy_update_new_beacon(struct wiphy *wiphy, 1395e38f8a7aSLuis R. Rodriguez struct reg_beacon *reg_beacon) 1396e38f8a7aSLuis R. Rodriguez { 1397e38f8a7aSLuis R. Rodriguez unsigned int i; 1398e38f8a7aSLuis R. Rodriguez struct ieee80211_supported_band *sband; 1399e38f8a7aSLuis R. Rodriguez 1400e38f8a7aSLuis R. Rodriguez if (!wiphy->bands[reg_beacon->chan.band]) 1401e38f8a7aSLuis R. Rodriguez return; 1402e38f8a7aSLuis R. Rodriguez 1403e38f8a7aSLuis R. Rodriguez sband = wiphy->bands[reg_beacon->chan.band]; 1404e38f8a7aSLuis R. Rodriguez 1405e38f8a7aSLuis R. Rodriguez for (i = 0; i < sband->n_channels; i++) 1406e38f8a7aSLuis R. Rodriguez handle_reg_beacon(wiphy, i, reg_beacon); 1407e38f8a7aSLuis R. Rodriguez } 1408e38f8a7aSLuis R. Rodriguez 1409e38f8a7aSLuis R. Rodriguez /* 1410e38f8a7aSLuis R. Rodriguez * Called upon reg changes or a new wiphy is added 1411e38f8a7aSLuis R. Rodriguez */ 1412e38f8a7aSLuis R. Rodriguez static void wiphy_update_beacon_reg(struct wiphy *wiphy) 1413e38f8a7aSLuis R. Rodriguez { 1414e38f8a7aSLuis R. Rodriguez unsigned int i; 1415e38f8a7aSLuis R. Rodriguez struct ieee80211_supported_band *sband; 1416e38f8a7aSLuis R. Rodriguez struct reg_beacon *reg_beacon; 1417e38f8a7aSLuis R. Rodriguez 1418e38f8a7aSLuis R. Rodriguez list_for_each_entry(reg_beacon, ®_beacon_list, list) { 1419e38f8a7aSLuis R. Rodriguez if (!wiphy->bands[reg_beacon->chan.band]) 1420e38f8a7aSLuis R. Rodriguez continue; 1421e38f8a7aSLuis R. Rodriguez sband = wiphy->bands[reg_beacon->chan.band]; 1422e38f8a7aSLuis R. Rodriguez for (i = 0; i < sband->n_channels; i++) 1423e38f8a7aSLuis R. Rodriguez handle_reg_beacon(wiphy, i, reg_beacon); 1424e38f8a7aSLuis R. Rodriguez } 1425e38f8a7aSLuis R. Rodriguez } 1426e38f8a7aSLuis R. Rodriguez 1427e38f8a7aSLuis R. Rodriguez /* Reap the advantages of previously found beacons */ 1428e38f8a7aSLuis R. Rodriguez static void reg_process_beacons(struct wiphy *wiphy) 1429e38f8a7aSLuis R. Rodriguez { 1430b1ed8dddSLuis R. Rodriguez /* 1431b1ed8dddSLuis R. Rodriguez * Means we are just firing up cfg80211, so no beacons would 1432b1ed8dddSLuis R. Rodriguez * have been processed yet. 1433b1ed8dddSLuis R. Rodriguez */ 1434b1ed8dddSLuis R. Rodriguez if (!last_request) 1435b1ed8dddSLuis R. Rodriguez return; 1436e38f8a7aSLuis R. Rodriguez wiphy_update_beacon_reg(wiphy); 1437e38f8a7aSLuis R. Rodriguez } 1438e38f8a7aSLuis R. Rodriguez 14391a919318SJohannes Berg static bool is_ht40_allowed(struct ieee80211_channel *chan) 1440038659e7SLuis R. Rodriguez { 1441038659e7SLuis R. Rodriguez if (!chan) 1442038659e7SLuis R. Rodriguez return false; 14431a919318SJohannes Berg if (chan->flags & IEEE80211_CHAN_DISABLED) 14441a919318SJohannes Berg return false; 14451a919318SJohannes Berg /* This would happen when regulatory rules disallow HT40 completely */ 144655b183adSFelix Fietkau if ((chan->flags & IEEE80211_CHAN_NO_HT40) == IEEE80211_CHAN_NO_HT40) 144755b183adSFelix Fietkau return false; 144855b183adSFelix Fietkau return true; 1449038659e7SLuis R. Rodriguez } 1450038659e7SLuis R. Rodriguez 1451038659e7SLuis R. Rodriguez static void reg_process_ht_flags_channel(struct wiphy *wiphy, 1452fdc9d7b2SJohannes Berg struct ieee80211_channel *channel) 1453038659e7SLuis R. Rodriguez { 1454fdc9d7b2SJohannes Berg struct ieee80211_supported_band *sband = wiphy->bands[channel->band]; 1455038659e7SLuis R. Rodriguez struct ieee80211_channel *channel_before = NULL, *channel_after = NULL; 1456038659e7SLuis R. Rodriguez unsigned int i; 1457038659e7SLuis R. Rodriguez 14581a919318SJohannes Berg if (!is_ht40_allowed(channel)) { 1459038659e7SLuis R. Rodriguez channel->flags |= IEEE80211_CHAN_NO_HT40; 1460038659e7SLuis R. Rodriguez return; 1461038659e7SLuis R. Rodriguez } 1462038659e7SLuis R. Rodriguez 1463038659e7SLuis R. Rodriguez /* 1464038659e7SLuis R. Rodriguez * We need to ensure the extension channels exist to 1465038659e7SLuis R. Rodriguez * be able to use HT40- or HT40+, this finds them (or not) 1466038659e7SLuis R. Rodriguez */ 1467038659e7SLuis R. Rodriguez for (i = 0; i < sband->n_channels; i++) { 1468038659e7SLuis R. Rodriguez struct ieee80211_channel *c = &sband->channels[i]; 14691a919318SJohannes Berg 1470038659e7SLuis R. Rodriguez if (c->center_freq == (channel->center_freq - 20)) 1471038659e7SLuis R. Rodriguez channel_before = c; 1472038659e7SLuis R. Rodriguez if (c->center_freq == (channel->center_freq + 20)) 1473038659e7SLuis R. Rodriguez channel_after = c; 1474038659e7SLuis R. Rodriguez } 1475038659e7SLuis R. Rodriguez 1476038659e7SLuis R. Rodriguez /* 1477038659e7SLuis R. Rodriguez * Please note that this assumes target bandwidth is 20 MHz, 1478038659e7SLuis R. Rodriguez * if that ever changes we also need to change the below logic 1479038659e7SLuis R. Rodriguez * to include that as well. 1480038659e7SLuis R. Rodriguez */ 14811a919318SJohannes Berg if (!is_ht40_allowed(channel_before)) 1482689da1b3SLuis R. Rodriguez channel->flags |= IEEE80211_CHAN_NO_HT40MINUS; 1483038659e7SLuis R. Rodriguez else 1484689da1b3SLuis R. Rodriguez channel->flags &= ~IEEE80211_CHAN_NO_HT40MINUS; 1485038659e7SLuis R. Rodriguez 14861a919318SJohannes Berg if (!is_ht40_allowed(channel_after)) 1487689da1b3SLuis R. Rodriguez channel->flags |= IEEE80211_CHAN_NO_HT40PLUS; 1488038659e7SLuis R. Rodriguez else 1489689da1b3SLuis R. Rodriguez channel->flags &= ~IEEE80211_CHAN_NO_HT40PLUS; 1490038659e7SLuis R. Rodriguez } 1491038659e7SLuis R. Rodriguez 1492038659e7SLuis R. Rodriguez static void reg_process_ht_flags_band(struct wiphy *wiphy, 1493fdc9d7b2SJohannes Berg struct ieee80211_supported_band *sband) 1494038659e7SLuis R. Rodriguez { 1495038659e7SLuis R. Rodriguez unsigned int i; 1496038659e7SLuis R. Rodriguez 1497fdc9d7b2SJohannes Berg if (!sband) 1498fdc9d7b2SJohannes Berg return; 1499038659e7SLuis R. Rodriguez 1500038659e7SLuis R. Rodriguez for (i = 0; i < sband->n_channels; i++) 1501fdc9d7b2SJohannes Berg reg_process_ht_flags_channel(wiphy, &sband->channels[i]); 1502038659e7SLuis R. Rodriguez } 1503038659e7SLuis R. Rodriguez 1504038659e7SLuis R. Rodriguez static void reg_process_ht_flags(struct wiphy *wiphy) 1505038659e7SLuis R. Rodriguez { 1506038659e7SLuis R. Rodriguez enum ieee80211_band band; 1507038659e7SLuis R. Rodriguez 1508038659e7SLuis R. Rodriguez if (!wiphy) 1509038659e7SLuis R. Rodriguez return; 1510038659e7SLuis R. Rodriguez 1511fdc9d7b2SJohannes Berg for (band = 0; band < IEEE80211_NUM_BANDS; band++) 1512fdc9d7b2SJohannes Berg reg_process_ht_flags_band(wiphy, wiphy->bands[band]); 1513038659e7SLuis R. Rodriguez } 1514038659e7SLuis R. Rodriguez 15150e3802dbSLuis R. Rodriguez static void reg_call_notifier(struct wiphy *wiphy, 15160e3802dbSLuis R. Rodriguez struct regulatory_request *request) 15170e3802dbSLuis R. Rodriguez { 15180e3802dbSLuis R. Rodriguez if (wiphy->reg_notifier) 15190e3802dbSLuis R. Rodriguez wiphy->reg_notifier(wiphy, request); 15200e3802dbSLuis R. Rodriguez } 15210e3802dbSLuis R. Rodriguez 1522ad932f04SArik Nemtsov static bool reg_wdev_chan_valid(struct wiphy *wiphy, struct wireless_dev *wdev) 1523ad932f04SArik Nemtsov { 1524ad932f04SArik Nemtsov struct cfg80211_chan_def chandef; 1525ad932f04SArik Nemtsov struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); 152620658702SArik Nemtsov enum nl80211_iftype iftype; 1527ad932f04SArik Nemtsov 1528ad932f04SArik Nemtsov wdev_lock(wdev); 152920658702SArik Nemtsov iftype = wdev->iftype; 1530ad932f04SArik Nemtsov 153120658702SArik Nemtsov /* make sure the interface is active */ 1532ad932f04SArik Nemtsov if (!wdev->netdev || !netif_running(wdev->netdev)) 153320658702SArik Nemtsov goto wdev_inactive_unlock; 1534ad932f04SArik Nemtsov 153520658702SArik Nemtsov switch (iftype) { 1536ad932f04SArik Nemtsov case NL80211_IFTYPE_AP: 1537ad932f04SArik Nemtsov case NL80211_IFTYPE_P2P_GO: 1538ad932f04SArik Nemtsov if (!wdev->beacon_interval) 153920658702SArik Nemtsov goto wdev_inactive_unlock; 154020658702SArik Nemtsov chandef = wdev->chandef; 1541ad932f04SArik Nemtsov break; 1542185076d6SArik Nemtsov case NL80211_IFTYPE_ADHOC: 1543185076d6SArik Nemtsov if (!wdev->ssid_len) 154420658702SArik Nemtsov goto wdev_inactive_unlock; 154520658702SArik Nemtsov chandef = wdev->chandef; 1546185076d6SArik Nemtsov break; 1547ad932f04SArik Nemtsov case NL80211_IFTYPE_STATION: 1548ad932f04SArik Nemtsov case NL80211_IFTYPE_P2P_CLIENT: 1549ad932f04SArik Nemtsov if (!wdev->current_bss || 1550ad932f04SArik Nemtsov !wdev->current_bss->pub.channel) 155120658702SArik Nemtsov goto wdev_inactive_unlock; 1552ad932f04SArik Nemtsov 155320658702SArik Nemtsov if (!rdev->ops->get_channel || 155420658702SArik Nemtsov rdev_get_channel(rdev, wdev, &chandef)) 155520658702SArik Nemtsov cfg80211_chandef_create(&chandef, 155620658702SArik Nemtsov wdev->current_bss->pub.channel, 155720658702SArik Nemtsov NL80211_CHAN_NO_HT); 1558ad932f04SArik Nemtsov break; 1559ad932f04SArik Nemtsov case NL80211_IFTYPE_MONITOR: 1560ad932f04SArik Nemtsov case NL80211_IFTYPE_AP_VLAN: 1561ad932f04SArik Nemtsov case NL80211_IFTYPE_P2P_DEVICE: 1562ad932f04SArik Nemtsov /* no enforcement required */ 1563ad932f04SArik Nemtsov break; 1564ad932f04SArik Nemtsov default: 1565ad932f04SArik Nemtsov /* others not implemented for now */ 1566ad932f04SArik Nemtsov WARN_ON(1); 1567ad932f04SArik Nemtsov break; 1568ad932f04SArik Nemtsov } 1569ad932f04SArik Nemtsov 1570ad932f04SArik Nemtsov wdev_unlock(wdev); 157120658702SArik Nemtsov 157220658702SArik Nemtsov switch (iftype) { 157320658702SArik Nemtsov case NL80211_IFTYPE_AP: 157420658702SArik Nemtsov case NL80211_IFTYPE_P2P_GO: 157520658702SArik Nemtsov case NL80211_IFTYPE_ADHOC: 157620658702SArik Nemtsov return cfg80211_reg_can_beacon(wiphy, &chandef, iftype); 157720658702SArik Nemtsov case NL80211_IFTYPE_STATION: 157820658702SArik Nemtsov case NL80211_IFTYPE_P2P_CLIENT: 157920658702SArik Nemtsov return cfg80211_chandef_usable(wiphy, &chandef, 158020658702SArik Nemtsov IEEE80211_CHAN_DISABLED); 158120658702SArik Nemtsov default: 158220658702SArik Nemtsov break; 158320658702SArik Nemtsov } 158420658702SArik Nemtsov 158520658702SArik Nemtsov return true; 158620658702SArik Nemtsov 158720658702SArik Nemtsov wdev_inactive_unlock: 158820658702SArik Nemtsov wdev_unlock(wdev); 158920658702SArik Nemtsov return true; 1590ad932f04SArik Nemtsov } 1591ad932f04SArik Nemtsov 1592ad932f04SArik Nemtsov static void reg_leave_invalid_chans(struct wiphy *wiphy) 1593ad932f04SArik Nemtsov { 1594ad932f04SArik Nemtsov struct wireless_dev *wdev; 1595ad932f04SArik Nemtsov struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); 1596ad932f04SArik Nemtsov 1597ad932f04SArik Nemtsov ASSERT_RTNL(); 1598ad932f04SArik Nemtsov 1599ad932f04SArik Nemtsov list_for_each_entry(wdev, &rdev->wdev_list, list) 1600ad932f04SArik Nemtsov if (!reg_wdev_chan_valid(wiphy, wdev)) 1601ad932f04SArik Nemtsov cfg80211_leave(rdev, wdev); 1602ad932f04SArik Nemtsov } 1603ad932f04SArik Nemtsov 1604ad932f04SArik Nemtsov static void reg_check_chans_work(struct work_struct *work) 1605ad932f04SArik Nemtsov { 1606ad932f04SArik Nemtsov struct cfg80211_registered_device *rdev; 1607ad932f04SArik Nemtsov 1608ad932f04SArik Nemtsov REG_DBG_PRINT("Verifying active interfaces after reg change\n"); 1609ad932f04SArik Nemtsov rtnl_lock(); 1610ad932f04SArik Nemtsov 1611ad932f04SArik Nemtsov list_for_each_entry(rdev, &cfg80211_rdev_list, list) 1612ad932f04SArik Nemtsov if (!(rdev->wiphy.regulatory_flags & 1613ad932f04SArik Nemtsov REGULATORY_IGNORE_STALE_KICKOFF)) 1614ad932f04SArik Nemtsov reg_leave_invalid_chans(&rdev->wiphy); 1615ad932f04SArik Nemtsov 1616ad932f04SArik Nemtsov rtnl_unlock(); 1617ad932f04SArik Nemtsov } 1618ad932f04SArik Nemtsov 1619ad932f04SArik Nemtsov static void reg_check_channels(void) 1620ad932f04SArik Nemtsov { 1621ad932f04SArik Nemtsov /* 1622ad932f04SArik Nemtsov * Give usermode a chance to do something nicer (move to another 1623ad932f04SArik Nemtsov * channel, orderly disconnection), before forcing a disconnection. 1624ad932f04SArik Nemtsov */ 1625ad932f04SArik Nemtsov mod_delayed_work(system_power_efficient_wq, 1626ad932f04SArik Nemtsov ®_check_chans, 1627ad932f04SArik Nemtsov msecs_to_jiffies(REG_ENFORCE_GRACE_MS)); 1628ad932f04SArik Nemtsov } 1629ad932f04SArik Nemtsov 1630eac03e38SSven Neumann static void wiphy_update_regulatory(struct wiphy *wiphy, 16317db90f4aSLuis R. Rodriguez enum nl80211_reg_initiator initiator) 16328318d78aSJohannes Berg { 16338318d78aSJohannes Berg enum ieee80211_band band; 1634c492db37SJohannes Berg struct regulatory_request *lr = get_last_request(); 1635eac03e38SSven Neumann 16360e3802dbSLuis R. Rodriguez if (ignore_reg_update(wiphy, initiator)) { 16370e3802dbSLuis R. Rodriguez /* 16380e3802dbSLuis R. Rodriguez * Regulatory updates set by CORE are ignored for custom 16390e3802dbSLuis R. Rodriguez * regulatory cards. Let us notify the changes to the driver, 16400e3802dbSLuis R. Rodriguez * as some drivers used this to restore its orig_* reg domain. 16410e3802dbSLuis R. Rodriguez */ 16420e3802dbSLuis R. Rodriguez if (initiator == NL80211_REGDOM_SET_BY_CORE && 1643a2f73b6cSLuis R. Rodriguez wiphy->regulatory_flags & REGULATORY_CUSTOM_REG) 16440e3802dbSLuis R. Rodriguez reg_call_notifier(wiphy, lr); 1645a203c2aaSSven Neumann return; 16460e3802dbSLuis R. Rodriguez } 1647a203c2aaSSven Neumann 1648c492db37SJohannes Berg lr->dfs_region = get_cfg80211_regdom()->dfs_region; 1649b68e6b3bSLuis R. Rodriguez 1650fdc9d7b2SJohannes Berg for (band = 0; band < IEEE80211_NUM_BANDS; band++) 1651fdc9d7b2SJohannes Berg handle_band(wiphy, initiator, wiphy->bands[band]); 1652a203c2aaSSven Neumann 1653e38f8a7aSLuis R. Rodriguez reg_process_beacons(wiphy); 1654038659e7SLuis R. Rodriguez reg_process_ht_flags(wiphy); 16550e3802dbSLuis R. Rodriguez reg_call_notifier(wiphy, lr); 1656b2e1b302SLuis R. Rodriguez } 1657b2e1b302SLuis R. Rodriguez 1658d7549cbbSSven Neumann static void update_all_wiphy_regulatory(enum nl80211_reg_initiator initiator) 1659d7549cbbSSven Neumann { 1660d7549cbbSSven Neumann struct cfg80211_registered_device *rdev; 16614a38994fSRajkumar Manoharan struct wiphy *wiphy; 1662d7549cbbSSven Neumann 16635fe231e8SJohannes Berg ASSERT_RTNL(); 1664458f4f9eSJohannes Berg 16654a38994fSRajkumar Manoharan list_for_each_entry(rdev, &cfg80211_rdev_list, list) { 16664a38994fSRajkumar Manoharan wiphy = &rdev->wiphy; 16674a38994fSRajkumar Manoharan wiphy_update_regulatory(wiphy, initiator); 16684a38994fSRajkumar Manoharan } 1669ad932f04SArik Nemtsov 1670ad932f04SArik Nemtsov reg_check_channels(); 1671d7549cbbSSven Neumann } 1672d7549cbbSSven Neumann 16731fa25e41SLuis R. Rodriguez static void handle_channel_custom(struct wiphy *wiphy, 1674fdc9d7b2SJohannes Berg struct ieee80211_channel *chan, 16751fa25e41SLuis R. Rodriguez const struct ieee80211_regdomain *regd) 16761fa25e41SLuis R. Rodriguez { 1677038659e7SLuis R. Rodriguez u32 bw_flags = 0; 16781fa25e41SLuis R. Rodriguez const struct ieee80211_reg_rule *reg_rule = NULL; 16791fa25e41SLuis R. Rodriguez const struct ieee80211_power_rule *power_rule = NULL; 1680038659e7SLuis R. Rodriguez const struct ieee80211_freq_range *freq_range = NULL; 168197524820SJanusz Dziedzic u32 max_bandwidth_khz; 16821fa25e41SLuis R. Rodriguez 1683361c9c8bSJohannes Berg reg_rule = freq_reg_info_regd(wiphy, MHZ_TO_KHZ(chan->center_freq), 1684038659e7SLuis R. Rodriguez regd); 16851fa25e41SLuis R. Rodriguez 1686361c9c8bSJohannes Berg if (IS_ERR(reg_rule)) { 1687fe7ef5e9SJohannes Berg REG_DBG_PRINT("Disabling freq %d MHz as custom regd has no rule that fits it\n", 1688fe7ef5e9SJohannes Berg chan->center_freq); 1689db8dfee5SArik Nemtsov if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) { 1690db8dfee5SArik Nemtsov chan->flags |= IEEE80211_CHAN_DISABLED; 1691db8dfee5SArik Nemtsov } else { 1692cc493e4fSLuis R. Rodriguez chan->orig_flags |= IEEE80211_CHAN_DISABLED; 1693cc493e4fSLuis R. Rodriguez chan->flags = chan->orig_flags; 1694db8dfee5SArik Nemtsov } 16951fa25e41SLuis R. Rodriguez return; 16961fa25e41SLuis R. Rodriguez } 16971fa25e41SLuis R. Rodriguez 1698b0dfd2eaSJanusz Dziedzic chan_reg_rule_print_dbg(regd, chan, reg_rule); 1699e702d3cfSLuis R. Rodriguez 17001fa25e41SLuis R. Rodriguez power_rule = ®_rule->power_rule; 1701038659e7SLuis R. Rodriguez freq_range = ®_rule->freq_range; 17021fa25e41SLuis R. Rodriguez 170397524820SJanusz Dziedzic max_bandwidth_khz = freq_range->max_bandwidth_khz; 170497524820SJanusz Dziedzic /* Check if auto calculation requested */ 1705b0dfd2eaSJanusz Dziedzic if (reg_rule->flags & NL80211_RRF_AUTO_BW) 170697524820SJanusz Dziedzic max_bandwidth_khz = reg_get_max_bandwidth(regd, reg_rule); 170797524820SJanusz Dziedzic 170897524820SJanusz Dziedzic if (max_bandwidth_khz < MHZ_TO_KHZ(40)) 1709e33e2241SJohannes Berg bw_flags = IEEE80211_CHAN_NO_HT40; 171097524820SJanusz Dziedzic if (max_bandwidth_khz < MHZ_TO_KHZ(80)) 1711c7a6ee27SJohannes Berg bw_flags |= IEEE80211_CHAN_NO_80MHZ; 171297524820SJanusz Dziedzic if (max_bandwidth_khz < MHZ_TO_KHZ(160)) 1713c7a6ee27SJohannes Berg bw_flags |= IEEE80211_CHAN_NO_160MHZ; 1714038659e7SLuis R. Rodriguez 17152e18b38fSArik Nemtsov chan->dfs_state_entered = jiffies; 1716c7ab5081SArik Nemtsov chan->dfs_state = NL80211_DFS_USABLE; 1717c7ab5081SArik Nemtsov 1718c7ab5081SArik Nemtsov chan->beacon_found = false; 1719db8dfee5SArik Nemtsov 1720db8dfee5SArik Nemtsov if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) 1721db8dfee5SArik Nemtsov chan->flags = chan->orig_flags | bw_flags | 1722db8dfee5SArik Nemtsov map_regdom_flags(reg_rule->flags); 1723db8dfee5SArik Nemtsov else 1724038659e7SLuis R. Rodriguez chan->flags |= map_regdom_flags(reg_rule->flags) | bw_flags; 1725db8dfee5SArik Nemtsov 17261fa25e41SLuis R. Rodriguez chan->max_antenna_gain = (int) MBI_TO_DBI(power_rule->max_antenna_gain); 1727279f0f55SFelix Fietkau chan->max_reg_power = chan->max_power = 1728279f0f55SFelix Fietkau (int) MBM_TO_DBM(power_rule->max_eirp); 17292e18b38fSArik Nemtsov 17302e18b38fSArik Nemtsov if (chan->flags & IEEE80211_CHAN_RADAR) { 17312e18b38fSArik Nemtsov if (reg_rule->dfs_cac_ms) 17322e18b38fSArik Nemtsov chan->dfs_cac_ms = reg_rule->dfs_cac_ms; 17332e18b38fSArik Nemtsov else 17342e18b38fSArik Nemtsov chan->dfs_cac_ms = IEEE80211_DFS_MIN_CAC_TIME_MS; 17352e18b38fSArik Nemtsov } 17362e18b38fSArik Nemtsov 17372e18b38fSArik Nemtsov chan->max_power = chan->max_reg_power; 17381fa25e41SLuis R. Rodriguez } 17391fa25e41SLuis R. Rodriguez 1740fdc9d7b2SJohannes Berg static void handle_band_custom(struct wiphy *wiphy, 1741fdc9d7b2SJohannes Berg struct ieee80211_supported_band *sband, 17421fa25e41SLuis R. Rodriguez const struct ieee80211_regdomain *regd) 17431fa25e41SLuis R. Rodriguez { 17441fa25e41SLuis R. Rodriguez unsigned int i; 17451fa25e41SLuis R. Rodriguez 1746fdc9d7b2SJohannes Berg if (!sband) 1747fdc9d7b2SJohannes Berg return; 17481fa25e41SLuis R. Rodriguez 17491fa25e41SLuis R. Rodriguez for (i = 0; i < sband->n_channels; i++) 1750fdc9d7b2SJohannes Berg handle_channel_custom(wiphy, &sband->channels[i], regd); 17511fa25e41SLuis R. Rodriguez } 17521fa25e41SLuis R. Rodriguez 17531fa25e41SLuis R. Rodriguez /* Used by drivers prior to wiphy registration */ 17541fa25e41SLuis R. Rodriguez void wiphy_apply_custom_regulatory(struct wiphy *wiphy, 17551fa25e41SLuis R. Rodriguez const struct ieee80211_regdomain *regd) 17561fa25e41SLuis R. Rodriguez { 17571fa25e41SLuis R. Rodriguez enum ieee80211_band band; 1758bbcf3f02SLuis R. Rodriguez unsigned int bands_set = 0; 1759ac46d48eSLuis R. Rodriguez 1760a2f73b6cSLuis R. Rodriguez WARN(!(wiphy->regulatory_flags & REGULATORY_CUSTOM_REG), 1761a2f73b6cSLuis R. Rodriguez "wiphy should have REGULATORY_CUSTOM_REG\n"); 1762a2f73b6cSLuis R. Rodriguez wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG; 1763222ea581SLuis R. Rodriguez 17641fa25e41SLuis R. Rodriguez for (band = 0; band < IEEE80211_NUM_BANDS; band++) { 1765bbcf3f02SLuis R. Rodriguez if (!wiphy->bands[band]) 1766bbcf3f02SLuis R. Rodriguez continue; 1767fdc9d7b2SJohannes Berg handle_band_custom(wiphy, wiphy->bands[band], regd); 1768bbcf3f02SLuis R. Rodriguez bands_set++; 17691fa25e41SLuis R. Rodriguez } 1770bbcf3f02SLuis R. Rodriguez 1771bbcf3f02SLuis R. Rodriguez /* 1772bbcf3f02SLuis R. Rodriguez * no point in calling this if it won't have any effect 17731a919318SJohannes Berg * on your device's supported bands. 1774bbcf3f02SLuis R. Rodriguez */ 1775bbcf3f02SLuis R. Rodriguez WARN_ON(!bands_set); 17761fa25e41SLuis R. Rodriguez } 17771fa25e41SLuis R. Rodriguez EXPORT_SYMBOL(wiphy_apply_custom_regulatory); 17781fa25e41SLuis R. Rodriguez 1779b2e253cfSLuis R. Rodriguez static void reg_set_request_processed(void) 1780b2e253cfSLuis R. Rodriguez { 1781b2e253cfSLuis R. Rodriguez bool need_more_processing = false; 1782c492db37SJohannes Berg struct regulatory_request *lr = get_last_request(); 1783b2e253cfSLuis R. Rodriguez 1784c492db37SJohannes Berg lr->processed = true; 1785b2e253cfSLuis R. Rodriguez 1786b2e253cfSLuis R. Rodriguez spin_lock(®_requests_lock); 1787b2e253cfSLuis R. Rodriguez if (!list_empty(®_requests_list)) 1788b2e253cfSLuis R. Rodriguez need_more_processing = true; 1789b2e253cfSLuis R. Rodriguez spin_unlock(®_requests_lock); 1790b2e253cfSLuis R. Rodriguez 1791c492db37SJohannes Berg if (lr->initiator == NL80211_REGDOM_SET_BY_USER) 1792fe20b39eSEliad Peller cancel_delayed_work(®_timeout); 1793a90c7a31SLuis R. Rodriguez 1794b2e253cfSLuis R. Rodriguez if (need_more_processing) 1795b2e253cfSLuis R. Rodriguez schedule_work(®_work); 1796b2e253cfSLuis R. Rodriguez } 1797b2e253cfSLuis R. Rodriguez 1798d1c96a9aSLuis R. Rodriguez /** 1799b3eb7f3fSLuis R. Rodriguez * reg_process_hint_core - process core regulatory requests 1800b3eb7f3fSLuis R. Rodriguez * @pending_request: a pending core regulatory request 1801b3eb7f3fSLuis R. Rodriguez * 1802b3eb7f3fSLuis R. Rodriguez * The wireless subsystem can use this function to process 1803b3eb7f3fSLuis R. Rodriguez * a regulatory request issued by the regulatory core. 1804b3eb7f3fSLuis R. Rodriguez * 1805b3eb7f3fSLuis R. Rodriguez * Returns one of the different reg request treatment values. 1806b3eb7f3fSLuis R. Rodriguez */ 1807b3eb7f3fSLuis R. Rodriguez static enum reg_request_treatment 1808b3eb7f3fSLuis R. Rodriguez reg_process_hint_core(struct regulatory_request *core_request) 1809b3eb7f3fSLuis R. Rodriguez { 1810b3eb7f3fSLuis R. Rodriguez 1811b3eb7f3fSLuis R. Rodriguez core_request->intersect = false; 1812b3eb7f3fSLuis R. Rodriguez core_request->processed = false; 18135ad6ef5eSLuis R. Rodriguez 181405f1a3eaSLuis R. Rodriguez reg_update_last_request(core_request); 1815b3eb7f3fSLuis R. Rodriguez 1816fe6631ffSLuis R. Rodriguez return reg_call_crda(core_request); 1817b3eb7f3fSLuis R. Rodriguez } 1818b3eb7f3fSLuis R. Rodriguez 18190d97a619SLuis R. Rodriguez static enum reg_request_treatment 18200d97a619SLuis R. Rodriguez __reg_process_hint_user(struct regulatory_request *user_request) 18210d97a619SLuis R. Rodriguez { 18220d97a619SLuis R. Rodriguez struct regulatory_request *lr = get_last_request(); 18230d97a619SLuis R. Rodriguez 18240d97a619SLuis R. Rodriguez if (reg_request_cell_base(user_request)) 18250d97a619SLuis R. Rodriguez return reg_ignore_cell_hint(user_request); 18260d97a619SLuis R. Rodriguez 18270d97a619SLuis R. Rodriguez if (reg_request_cell_base(lr)) 18280d97a619SLuis R. Rodriguez return REG_REQ_IGNORE; 18290d97a619SLuis R. Rodriguez 18300d97a619SLuis R. Rodriguez if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) 18310d97a619SLuis R. Rodriguez return REG_REQ_INTERSECT; 18320d97a619SLuis R. Rodriguez /* 18330d97a619SLuis R. Rodriguez * If the user knows better the user should set the regdom 18340d97a619SLuis R. Rodriguez * to their country before the IE is picked up 18350d97a619SLuis R. Rodriguez */ 18360d97a619SLuis R. Rodriguez if (lr->initiator == NL80211_REGDOM_SET_BY_USER && 18370d97a619SLuis R. Rodriguez lr->intersect) 18380d97a619SLuis R. Rodriguez return REG_REQ_IGNORE; 18390d97a619SLuis R. Rodriguez /* 18400d97a619SLuis R. Rodriguez * Process user requests only after previous user/driver/core 18410d97a619SLuis R. Rodriguez * requests have been processed 18420d97a619SLuis R. Rodriguez */ 18430d97a619SLuis R. Rodriguez if ((lr->initiator == NL80211_REGDOM_SET_BY_CORE || 18440d97a619SLuis R. Rodriguez lr->initiator == NL80211_REGDOM_SET_BY_DRIVER || 18450d97a619SLuis R. Rodriguez lr->initiator == NL80211_REGDOM_SET_BY_USER) && 18460d97a619SLuis R. Rodriguez regdom_changes(lr->alpha2)) 18470d97a619SLuis R. Rodriguez return REG_REQ_IGNORE; 18480d97a619SLuis R. Rodriguez 18490d97a619SLuis R. Rodriguez if (!regdom_changes(user_request->alpha2)) 18500d97a619SLuis R. Rodriguez return REG_REQ_ALREADY_SET; 18510d97a619SLuis R. Rodriguez 18520d97a619SLuis R. Rodriguez return REG_REQ_OK; 18530d97a619SLuis R. Rodriguez } 18540d97a619SLuis R. Rodriguez 18550d97a619SLuis R. Rodriguez /** 18560d97a619SLuis R. Rodriguez * reg_process_hint_user - process user regulatory requests 18570d97a619SLuis R. Rodriguez * @user_request: a pending user regulatory request 18580d97a619SLuis R. Rodriguez * 18590d97a619SLuis R. Rodriguez * The wireless subsystem can use this function to process 18600d97a619SLuis R. Rodriguez * a regulatory request initiated by userspace. 18610d97a619SLuis R. Rodriguez * 18620d97a619SLuis R. Rodriguez * Returns one of the different reg request treatment values. 18630d97a619SLuis R. Rodriguez */ 18640d97a619SLuis R. Rodriguez static enum reg_request_treatment 18650d97a619SLuis R. Rodriguez reg_process_hint_user(struct regulatory_request *user_request) 18660d97a619SLuis R. Rodriguez { 18670d97a619SLuis R. Rodriguez enum reg_request_treatment treatment; 18680d97a619SLuis R. Rodriguez 18690d97a619SLuis R. Rodriguez treatment = __reg_process_hint_user(user_request); 18700d97a619SLuis R. Rodriguez if (treatment == REG_REQ_IGNORE || 18710c4ddcd2SIlan peer treatment == REG_REQ_ALREADY_SET) { 1872c888393bSArik Nemtsov reg_free_request(user_request); 18730d97a619SLuis R. Rodriguez return treatment; 18740d97a619SLuis R. Rodriguez } 18750d97a619SLuis R. Rodriguez 18760d97a619SLuis R. Rodriguez user_request->intersect = treatment == REG_REQ_INTERSECT; 18770d97a619SLuis R. Rodriguez user_request->processed = false; 18785ad6ef5eSLuis R. Rodriguez 187905f1a3eaSLuis R. Rodriguez reg_update_last_request(user_request); 18800d97a619SLuis R. Rodriguez 18810d97a619SLuis R. Rodriguez user_alpha2[0] = user_request->alpha2[0]; 18820d97a619SLuis R. Rodriguez user_alpha2[1] = user_request->alpha2[1]; 18830d97a619SLuis R. Rodriguez 1884fe6631ffSLuis R. Rodriguez return reg_call_crda(user_request); 18850d97a619SLuis R. Rodriguez } 18860d97a619SLuis R. Rodriguez 188721636c7fSLuis R. Rodriguez static enum reg_request_treatment 188821636c7fSLuis R. Rodriguez __reg_process_hint_driver(struct regulatory_request *driver_request) 188921636c7fSLuis R. Rodriguez { 189021636c7fSLuis R. Rodriguez struct regulatory_request *lr = get_last_request(); 189121636c7fSLuis R. Rodriguez 189221636c7fSLuis R. Rodriguez if (lr->initiator == NL80211_REGDOM_SET_BY_CORE) { 189321636c7fSLuis R. Rodriguez if (regdom_changes(driver_request->alpha2)) 189421636c7fSLuis R. Rodriguez return REG_REQ_OK; 189521636c7fSLuis R. Rodriguez return REG_REQ_ALREADY_SET; 189621636c7fSLuis R. Rodriguez } 189721636c7fSLuis R. Rodriguez 189821636c7fSLuis R. Rodriguez /* 189921636c7fSLuis R. Rodriguez * This would happen if you unplug and plug your card 190021636c7fSLuis R. Rodriguez * back in or if you add a new device for which the previously 190121636c7fSLuis R. Rodriguez * loaded card also agrees on the regulatory domain. 190221636c7fSLuis R. Rodriguez */ 190321636c7fSLuis R. Rodriguez if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER && 190421636c7fSLuis R. Rodriguez !regdom_changes(driver_request->alpha2)) 190521636c7fSLuis R. Rodriguez return REG_REQ_ALREADY_SET; 190621636c7fSLuis R. Rodriguez 190721636c7fSLuis R. Rodriguez return REG_REQ_INTERSECT; 190821636c7fSLuis R. Rodriguez } 190921636c7fSLuis R. Rodriguez 191021636c7fSLuis R. Rodriguez /** 191121636c7fSLuis R. Rodriguez * reg_process_hint_driver - process driver regulatory requests 191221636c7fSLuis R. Rodriguez * @driver_request: a pending driver regulatory request 191321636c7fSLuis R. Rodriguez * 191421636c7fSLuis R. Rodriguez * The wireless subsystem can use this function to process 191521636c7fSLuis R. Rodriguez * a regulatory request issued by an 802.11 driver. 191621636c7fSLuis R. Rodriguez * 191721636c7fSLuis R. Rodriguez * Returns one of the different reg request treatment values. 191821636c7fSLuis R. Rodriguez */ 191921636c7fSLuis R. Rodriguez static enum reg_request_treatment 192021636c7fSLuis R. Rodriguez reg_process_hint_driver(struct wiphy *wiphy, 192121636c7fSLuis R. Rodriguez struct regulatory_request *driver_request) 192221636c7fSLuis R. Rodriguez { 192334f05f54SArik Nemtsov const struct ieee80211_regdomain *regd, *tmp; 192421636c7fSLuis R. Rodriguez enum reg_request_treatment treatment; 192521636c7fSLuis R. Rodriguez 192621636c7fSLuis R. Rodriguez treatment = __reg_process_hint_driver(driver_request); 192721636c7fSLuis R. Rodriguez 192821636c7fSLuis R. Rodriguez switch (treatment) { 192921636c7fSLuis R. Rodriguez case REG_REQ_OK: 193021636c7fSLuis R. Rodriguez break; 193121636c7fSLuis R. Rodriguez case REG_REQ_IGNORE: 1932c888393bSArik Nemtsov reg_free_request(driver_request); 193321636c7fSLuis R. Rodriguez return treatment; 193421636c7fSLuis R. Rodriguez case REG_REQ_INTERSECT: 193521636c7fSLuis R. Rodriguez /* fall through */ 193621636c7fSLuis R. Rodriguez case REG_REQ_ALREADY_SET: 193721636c7fSLuis R. Rodriguez regd = reg_copy_regd(get_cfg80211_regdom()); 193821636c7fSLuis R. Rodriguez if (IS_ERR(regd)) { 1939c888393bSArik Nemtsov reg_free_request(driver_request); 194021636c7fSLuis R. Rodriguez return REG_REQ_IGNORE; 194121636c7fSLuis R. Rodriguez } 194234f05f54SArik Nemtsov 194334f05f54SArik Nemtsov tmp = get_wiphy_regdom(wiphy); 194421636c7fSLuis R. Rodriguez rcu_assign_pointer(wiphy->regd, regd); 194534f05f54SArik Nemtsov rcu_free_regdom(tmp); 194621636c7fSLuis R. Rodriguez } 194721636c7fSLuis R. Rodriguez 194821636c7fSLuis R. Rodriguez 194921636c7fSLuis R. Rodriguez driver_request->intersect = treatment == REG_REQ_INTERSECT; 195021636c7fSLuis R. Rodriguez driver_request->processed = false; 19515ad6ef5eSLuis R. Rodriguez 195205f1a3eaSLuis R. Rodriguez reg_update_last_request(driver_request); 195321636c7fSLuis R. Rodriguez 195421636c7fSLuis R. Rodriguez /* 195521636c7fSLuis R. Rodriguez * Since CRDA will not be called in this case as we already 195621636c7fSLuis R. Rodriguez * have applied the requested regulatory domain before we just 195721636c7fSLuis R. Rodriguez * inform userspace we have processed the request 195821636c7fSLuis R. Rodriguez */ 195921636c7fSLuis R. Rodriguez if (treatment == REG_REQ_ALREADY_SET) { 196021636c7fSLuis R. Rodriguez nl80211_send_reg_change_event(driver_request); 196121636c7fSLuis R. Rodriguez reg_set_request_processed(); 196221636c7fSLuis R. Rodriguez return treatment; 196321636c7fSLuis R. Rodriguez } 196421636c7fSLuis R. Rodriguez 1965fe6631ffSLuis R. Rodriguez return reg_call_crda(driver_request); 196621636c7fSLuis R. Rodriguez } 196721636c7fSLuis R. Rodriguez 1968b23e7a9eSLuis R. Rodriguez static enum reg_request_treatment 1969b23e7a9eSLuis R. Rodriguez __reg_process_hint_country_ie(struct wiphy *wiphy, 1970b23e7a9eSLuis R. Rodriguez struct regulatory_request *country_ie_request) 1971b23e7a9eSLuis R. Rodriguez { 1972b23e7a9eSLuis R. Rodriguez struct wiphy *last_wiphy = NULL; 1973b23e7a9eSLuis R. Rodriguez struct regulatory_request *lr = get_last_request(); 1974b23e7a9eSLuis R. Rodriguez 1975b23e7a9eSLuis R. Rodriguez if (reg_request_cell_base(lr)) { 1976b23e7a9eSLuis R. Rodriguez /* Trust a Cell base station over the AP's country IE */ 1977b23e7a9eSLuis R. Rodriguez if (regdom_changes(country_ie_request->alpha2)) 1978b23e7a9eSLuis R. Rodriguez return REG_REQ_IGNORE; 1979b23e7a9eSLuis R. Rodriguez return REG_REQ_ALREADY_SET; 19802a901468SLuis R. Rodriguez } else { 19812a901468SLuis R. Rodriguez if (wiphy->regulatory_flags & REGULATORY_COUNTRY_IE_IGNORE) 19822a901468SLuis R. Rodriguez return REG_REQ_IGNORE; 1983b23e7a9eSLuis R. Rodriguez } 1984b23e7a9eSLuis R. Rodriguez 1985b23e7a9eSLuis R. Rodriguez if (unlikely(!is_an_alpha2(country_ie_request->alpha2))) 1986b23e7a9eSLuis R. Rodriguez return -EINVAL; 19872f1c6c57SLuis R. Rodriguez 19882f1c6c57SLuis R. Rodriguez if (lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE) 19892f1c6c57SLuis R. Rodriguez return REG_REQ_OK; 19902f1c6c57SLuis R. Rodriguez 19912f1c6c57SLuis R. Rodriguez last_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx); 19922f1c6c57SLuis R. Rodriguez 1993b23e7a9eSLuis R. Rodriguez if (last_wiphy != wiphy) { 1994b23e7a9eSLuis R. Rodriguez /* 1995b23e7a9eSLuis R. Rodriguez * Two cards with two APs claiming different 1996b23e7a9eSLuis R. Rodriguez * Country IE alpha2s. We could 1997b23e7a9eSLuis R. Rodriguez * intersect them, but that seems unlikely 1998b23e7a9eSLuis R. Rodriguez * to be correct. Reject second one for now. 1999b23e7a9eSLuis R. Rodriguez */ 2000b23e7a9eSLuis R. Rodriguez if (regdom_changes(country_ie_request->alpha2)) 2001b23e7a9eSLuis R. Rodriguez return REG_REQ_IGNORE; 2002b23e7a9eSLuis R. Rodriguez return REG_REQ_ALREADY_SET; 2003b23e7a9eSLuis R. Rodriguez } 200470dcec5aSEmmanuel Grumbach 200570dcec5aSEmmanuel Grumbach if (regdom_changes(country_ie_request->alpha2)) 2006b23e7a9eSLuis R. Rodriguez return REG_REQ_OK; 2007b23e7a9eSLuis R. Rodriguez return REG_REQ_ALREADY_SET; 2008b23e7a9eSLuis R. Rodriguez } 2009b23e7a9eSLuis R. Rodriguez 2010b3eb7f3fSLuis R. Rodriguez /** 2011b23e7a9eSLuis R. Rodriguez * reg_process_hint_country_ie - process regulatory requests from country IEs 2012b23e7a9eSLuis R. Rodriguez * @country_ie_request: a regulatory request from a country IE 2013d1c96a9aSLuis R. Rodriguez * 2014b23e7a9eSLuis R. Rodriguez * The wireless subsystem can use this function to process 2015b23e7a9eSLuis R. Rodriguez * a regulatory request issued by a country Information Element. 2016d1c96a9aSLuis R. Rodriguez * 20172f92212bSJohannes Berg * Returns one of the different reg request treatment values. 2018d1c96a9aSLuis R. Rodriguez */ 20192f92212bSJohannes Berg static enum reg_request_treatment 2020b23e7a9eSLuis R. Rodriguez reg_process_hint_country_ie(struct wiphy *wiphy, 2021b23e7a9eSLuis R. Rodriguez struct regulatory_request *country_ie_request) 2022b2e1b302SLuis R. Rodriguez { 20232f92212bSJohannes Berg enum reg_request_treatment treatment; 2024b2e1b302SLuis R. Rodriguez 2025b23e7a9eSLuis R. Rodriguez treatment = __reg_process_hint_country_ie(wiphy, country_ie_request); 2026761cf7ecSLuis R. Rodriguez 20272f92212bSJohannes Berg switch (treatment) { 20282f92212bSJohannes Berg case REG_REQ_OK: 20292f92212bSJohannes Berg break; 2030b23e7a9eSLuis R. Rodriguez case REG_REQ_IGNORE: 2031b23e7a9eSLuis R. Rodriguez /* fall through */ 2032b23e7a9eSLuis R. Rodriguez case REG_REQ_ALREADY_SET: 2033c888393bSArik Nemtsov reg_free_request(country_ie_request); 2034b23e7a9eSLuis R. Rodriguez return treatment; 2035b23e7a9eSLuis R. Rodriguez case REG_REQ_INTERSECT: 2036c888393bSArik Nemtsov reg_free_request(country_ie_request); 2037fb1fc7adSLuis R. Rodriguez /* 2038b23e7a9eSLuis R. Rodriguez * This doesn't happen yet, not sure we 2039b23e7a9eSLuis R. Rodriguez * ever want to support it for this case. 2040fb1fc7adSLuis R. Rodriguez */ 2041b23e7a9eSLuis R. Rodriguez WARN_ONCE(1, "Unexpected intersection for country IEs"); 20422f92212bSJohannes Berg return REG_REQ_IGNORE; 2043d951c1ddSLuis R. Rodriguez } 2044b2e1b302SLuis R. Rodriguez 2045b23e7a9eSLuis R. Rodriguez country_ie_request->intersect = false; 2046b23e7a9eSLuis R. Rodriguez country_ie_request->processed = false; 20475ad6ef5eSLuis R. Rodriguez 204805f1a3eaSLuis R. Rodriguez reg_update_last_request(country_ie_request); 2049d951c1ddSLuis R. Rodriguez 2050fe6631ffSLuis R. Rodriguez return reg_call_crda(country_ie_request); 2051b2e1b302SLuis R. Rodriguez } 2052b2e1b302SLuis R. Rodriguez 205330a548c7SLuis R. Rodriguez /* This processes *all* regulatory hints */ 20541daa37c7SLuis R. Rodriguez static void reg_process_hint(struct regulatory_request *reg_request) 2055fe33eb39SLuis R. Rodriguez { 2056fe33eb39SLuis R. Rodriguez struct wiphy *wiphy = NULL; 2057b3eb7f3fSLuis R. Rodriguez enum reg_request_treatment treatment; 2058fe33eb39SLuis R. Rodriguez 2059f4173766SJohannes Berg if (reg_request->wiphy_idx != WIPHY_IDX_INVALID) 2060fe33eb39SLuis R. Rodriguez wiphy = wiphy_idx_to_wiphy(reg_request->wiphy_idx); 2061fe33eb39SLuis R. Rodriguez 2062b3eb7f3fSLuis R. Rodriguez switch (reg_request->initiator) { 2063b3eb7f3fSLuis R. Rodriguez case NL80211_REGDOM_SET_BY_CORE: 2064b3eb7f3fSLuis R. Rodriguez reg_process_hint_core(reg_request); 2065b3eb7f3fSLuis R. Rodriguez return; 2066b3eb7f3fSLuis R. Rodriguez case NL80211_REGDOM_SET_BY_USER: 20670d97a619SLuis R. Rodriguez treatment = reg_process_hint_user(reg_request); 206850c11eb9SInbal Hacohen if (treatment == REG_REQ_IGNORE || 20690c4ddcd2SIlan peer treatment == REG_REQ_ALREADY_SET) 20700d97a619SLuis R. Rodriguez return; 2071845f3351SShaibal Dutta queue_delayed_work(system_power_efficient_wq, 2072845f3351SShaibal Dutta ®_timeout, msecs_to_jiffies(3142)); 20730d97a619SLuis R. Rodriguez return; 2074b3eb7f3fSLuis R. Rodriguez case NL80211_REGDOM_SET_BY_DRIVER: 2075772f0389SIlan Peer if (!wiphy) 2076772f0389SIlan Peer goto out_free; 207721636c7fSLuis R. Rodriguez treatment = reg_process_hint_driver(wiphy, reg_request); 207821636c7fSLuis R. Rodriguez break; 2079b3eb7f3fSLuis R. Rodriguez case NL80211_REGDOM_SET_BY_COUNTRY_IE: 2080772f0389SIlan Peer if (!wiphy) 2081772f0389SIlan Peer goto out_free; 2082b23e7a9eSLuis R. Rodriguez treatment = reg_process_hint_country_ie(wiphy, reg_request); 2083b3eb7f3fSLuis R. Rodriguez break; 2084b3eb7f3fSLuis R. Rodriguez default: 2085b3eb7f3fSLuis R. Rodriguez WARN(1, "invalid initiator %d\n", reg_request->initiator); 2086772f0389SIlan Peer goto out_free; 2087b3eb7f3fSLuis R. Rodriguez } 2088b3eb7f3fSLuis R. Rodriguez 2089fe33eb39SLuis R. Rodriguez /* This is required so that the orig_* parameters are saved */ 2090b23e7a9eSLuis R. Rodriguez if (treatment == REG_REQ_ALREADY_SET && wiphy && 2091ad932f04SArik Nemtsov wiphy->regulatory_flags & REGULATORY_STRICT_REG) { 20921daa37c7SLuis R. Rodriguez wiphy_update_regulatory(wiphy, reg_request->initiator); 2093ad932f04SArik Nemtsov reg_check_channels(); 2094ad932f04SArik Nemtsov } 2095772f0389SIlan Peer 2096772f0389SIlan Peer return; 2097772f0389SIlan Peer 2098772f0389SIlan Peer out_free: 2099c888393bSArik Nemtsov reg_free_request(reg_request); 2100fe33eb39SLuis R. Rodriguez } 2101fe33eb39SLuis R. Rodriguez 2102ef51fb1dSArik Nemtsov static bool reg_only_self_managed_wiphys(void) 2103ef51fb1dSArik Nemtsov { 2104ef51fb1dSArik Nemtsov struct cfg80211_registered_device *rdev; 2105ef51fb1dSArik Nemtsov struct wiphy *wiphy; 2106ef51fb1dSArik Nemtsov bool self_managed_found = false; 2107ef51fb1dSArik Nemtsov 2108ef51fb1dSArik Nemtsov ASSERT_RTNL(); 2109ef51fb1dSArik Nemtsov 2110ef51fb1dSArik Nemtsov list_for_each_entry(rdev, &cfg80211_rdev_list, list) { 2111ef51fb1dSArik Nemtsov wiphy = &rdev->wiphy; 2112ef51fb1dSArik Nemtsov if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) 2113ef51fb1dSArik Nemtsov self_managed_found = true; 2114ef51fb1dSArik Nemtsov else 2115ef51fb1dSArik Nemtsov return false; 2116ef51fb1dSArik Nemtsov } 2117ef51fb1dSArik Nemtsov 2118ef51fb1dSArik Nemtsov /* make sure at least one self-managed wiphy exists */ 2119ef51fb1dSArik Nemtsov return self_managed_found; 2120ef51fb1dSArik Nemtsov } 2121ef51fb1dSArik Nemtsov 2122b2e253cfSLuis R. Rodriguez /* 2123b2e253cfSLuis R. Rodriguez * Processes regulatory hints, this is all the NL80211_REGDOM_SET_BY_* 2124b2e253cfSLuis R. Rodriguez * Regulatory hints come on a first come first serve basis and we 2125b2e253cfSLuis R. Rodriguez * must process each one atomically. 2126b2e253cfSLuis R. Rodriguez */ 2127fe33eb39SLuis R. Rodriguez static void reg_process_pending_hints(void) 2128fe33eb39SLuis R. Rodriguez { 2129c492db37SJohannes Berg struct regulatory_request *reg_request, *lr; 2130fe33eb39SLuis R. Rodriguez 2131c492db37SJohannes Berg lr = get_last_request(); 2132b0e2880bSLuis R. Rodriguez 2133b2e253cfSLuis R. Rodriguez /* When last_request->processed becomes true this will be rescheduled */ 2134c492db37SJohannes Berg if (lr && !lr->processed) { 213596cce12fSLuis R. Rodriguez reg_process_hint(lr); 21365fe231e8SJohannes Berg return; 2137b2e253cfSLuis R. Rodriguez } 2138b2e253cfSLuis R. Rodriguez 2139fe33eb39SLuis R. Rodriguez spin_lock(®_requests_lock); 2140b2e253cfSLuis R. Rodriguez 2141b2e253cfSLuis R. Rodriguez if (list_empty(®_requests_list)) { 2142b2e253cfSLuis R. Rodriguez spin_unlock(®_requests_lock); 21435fe231e8SJohannes Berg return; 2144b2e253cfSLuis R. Rodriguez } 2145b2e253cfSLuis R. Rodriguez 2146fe33eb39SLuis R. Rodriguez reg_request = list_first_entry(®_requests_list, 2147fe33eb39SLuis R. Rodriguez struct regulatory_request, 2148fe33eb39SLuis R. Rodriguez list); 2149fe33eb39SLuis R. Rodriguez list_del_init(®_request->list); 2150fe33eb39SLuis R. Rodriguez 2151d951c1ddSLuis R. Rodriguez spin_unlock(®_requests_lock); 2152b0e2880bSLuis R. Rodriguez 2153ef51fb1dSArik Nemtsov if (reg_only_self_managed_wiphys()) { 2154ef51fb1dSArik Nemtsov reg_free_request(reg_request); 2155ef51fb1dSArik Nemtsov return; 2156ef51fb1dSArik Nemtsov } 2157ef51fb1dSArik Nemtsov 21581daa37c7SLuis R. Rodriguez reg_process_hint(reg_request); 2159fe33eb39SLuis R. Rodriguez } 2160fe33eb39SLuis R. Rodriguez 2161e38f8a7aSLuis R. Rodriguez /* Processes beacon hints -- this has nothing to do with country IEs */ 2162e38f8a7aSLuis R. Rodriguez static void reg_process_pending_beacon_hints(void) 2163e38f8a7aSLuis R. Rodriguez { 216479c97e97SJohannes Berg struct cfg80211_registered_device *rdev; 2165e38f8a7aSLuis R. Rodriguez struct reg_beacon *pending_beacon, *tmp; 2166e38f8a7aSLuis R. Rodriguez 2167e38f8a7aSLuis R. Rodriguez /* This goes through the _pending_ beacon list */ 2168e38f8a7aSLuis R. Rodriguez spin_lock_bh(®_pending_beacons_lock); 2169e38f8a7aSLuis R. Rodriguez 2170e38f8a7aSLuis R. Rodriguez list_for_each_entry_safe(pending_beacon, tmp, 2171e38f8a7aSLuis R. Rodriguez ®_pending_beacons, list) { 2172e38f8a7aSLuis R. Rodriguez list_del_init(&pending_beacon->list); 2173e38f8a7aSLuis R. Rodriguez 2174e38f8a7aSLuis R. Rodriguez /* Applies the beacon hint to current wiphys */ 217579c97e97SJohannes Berg list_for_each_entry(rdev, &cfg80211_rdev_list, list) 217679c97e97SJohannes Berg wiphy_update_new_beacon(&rdev->wiphy, pending_beacon); 2177e38f8a7aSLuis R. Rodriguez 2178e38f8a7aSLuis R. Rodriguez /* Remembers the beacon hint for new wiphys or reg changes */ 2179e38f8a7aSLuis R. Rodriguez list_add_tail(&pending_beacon->list, ®_beacon_list); 2180e38f8a7aSLuis R. Rodriguez } 2181e38f8a7aSLuis R. Rodriguez 2182e38f8a7aSLuis R. Rodriguez spin_unlock_bh(®_pending_beacons_lock); 2183e38f8a7aSLuis R. Rodriguez } 2184e38f8a7aSLuis R. Rodriguez 2185b0d7aa59SJonathan Doron static void reg_process_self_managed_hints(void) 2186b0d7aa59SJonathan Doron { 2187b0d7aa59SJonathan Doron struct cfg80211_registered_device *rdev; 2188b0d7aa59SJonathan Doron struct wiphy *wiphy; 2189b0d7aa59SJonathan Doron const struct ieee80211_regdomain *tmp; 2190b0d7aa59SJonathan Doron const struct ieee80211_regdomain *regd; 2191b0d7aa59SJonathan Doron enum ieee80211_band band; 2192b0d7aa59SJonathan Doron struct regulatory_request request = {}; 2193b0d7aa59SJonathan Doron 2194b0d7aa59SJonathan Doron list_for_each_entry(rdev, &cfg80211_rdev_list, list) { 2195b0d7aa59SJonathan Doron wiphy = &rdev->wiphy; 2196b0d7aa59SJonathan Doron 2197b0d7aa59SJonathan Doron spin_lock(®_requests_lock); 2198b0d7aa59SJonathan Doron regd = rdev->requested_regd; 2199b0d7aa59SJonathan Doron rdev->requested_regd = NULL; 2200b0d7aa59SJonathan Doron spin_unlock(®_requests_lock); 2201b0d7aa59SJonathan Doron 2202b0d7aa59SJonathan Doron if (regd == NULL) 2203b0d7aa59SJonathan Doron continue; 2204b0d7aa59SJonathan Doron 2205b0d7aa59SJonathan Doron tmp = get_wiphy_regdom(wiphy); 2206b0d7aa59SJonathan Doron rcu_assign_pointer(wiphy->regd, regd); 2207b0d7aa59SJonathan Doron rcu_free_regdom(tmp); 2208b0d7aa59SJonathan Doron 2209b0d7aa59SJonathan Doron for (band = 0; band < IEEE80211_NUM_BANDS; band++) 2210b0d7aa59SJonathan Doron handle_band_custom(wiphy, wiphy->bands[band], regd); 2211b0d7aa59SJonathan Doron 2212b0d7aa59SJonathan Doron reg_process_ht_flags(wiphy); 2213b0d7aa59SJonathan Doron 2214b0d7aa59SJonathan Doron request.wiphy_idx = get_wiphy_idx(wiphy); 2215b0d7aa59SJonathan Doron request.alpha2[0] = regd->alpha2[0]; 2216b0d7aa59SJonathan Doron request.alpha2[1] = regd->alpha2[1]; 2217b0d7aa59SJonathan Doron request.initiator = NL80211_REGDOM_SET_BY_DRIVER; 2218b0d7aa59SJonathan Doron 2219b0d7aa59SJonathan Doron nl80211_send_wiphy_reg_change_event(&request); 2220b0d7aa59SJonathan Doron } 2221b0d7aa59SJonathan Doron 2222b0d7aa59SJonathan Doron reg_check_channels(); 2223b0d7aa59SJonathan Doron } 2224b0d7aa59SJonathan Doron 2225fe33eb39SLuis R. Rodriguez static void reg_todo(struct work_struct *work) 2226fe33eb39SLuis R. Rodriguez { 22275fe231e8SJohannes Berg rtnl_lock(); 2228fe33eb39SLuis R. Rodriguez reg_process_pending_hints(); 2229e38f8a7aSLuis R. Rodriguez reg_process_pending_beacon_hints(); 2230b0d7aa59SJonathan Doron reg_process_self_managed_hints(); 22315fe231e8SJohannes Berg rtnl_unlock(); 2232fe33eb39SLuis R. Rodriguez } 2233fe33eb39SLuis R. Rodriguez 2234fe33eb39SLuis R. Rodriguez static void queue_regulatory_request(struct regulatory_request *request) 2235fe33eb39SLuis R. Rodriguez { 2236c61029c7SJohn W. Linville request->alpha2[0] = toupper(request->alpha2[0]); 2237c61029c7SJohn W. Linville request->alpha2[1] = toupper(request->alpha2[1]); 2238c61029c7SJohn W. Linville 2239fe33eb39SLuis R. Rodriguez spin_lock(®_requests_lock); 2240fe33eb39SLuis R. Rodriguez list_add_tail(&request->list, ®_requests_list); 2241fe33eb39SLuis R. Rodriguez spin_unlock(®_requests_lock); 2242fe33eb39SLuis R. Rodriguez 2243fe33eb39SLuis R. Rodriguez schedule_work(®_work); 2244fe33eb39SLuis R. Rodriguez } 2245fe33eb39SLuis R. Rodriguez 224609d989d1SLuis R. Rodriguez /* 224709d989d1SLuis R. Rodriguez * Core regulatory hint -- happens during cfg80211_init() 224809d989d1SLuis R. Rodriguez * and when we restore regulatory settings. 224909d989d1SLuis R. Rodriguez */ 2250ba25c141SLuis R. Rodriguez static int regulatory_hint_core(const char *alpha2) 2251ba25c141SLuis R. Rodriguez { 2252ba25c141SLuis R. Rodriguez struct regulatory_request *request; 2253ba25c141SLuis R. Rodriguez 22541a919318SJohannes Berg request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); 2255ba25c141SLuis R. Rodriguez if (!request) 2256ba25c141SLuis R. Rodriguez return -ENOMEM; 2257ba25c141SLuis R. Rodriguez 2258ba25c141SLuis R. Rodriguez request->alpha2[0] = alpha2[0]; 2259ba25c141SLuis R. Rodriguez request->alpha2[1] = alpha2[1]; 22607db90f4aSLuis R. Rodriguez request->initiator = NL80211_REGDOM_SET_BY_CORE; 2261ba25c141SLuis R. Rodriguez 226231e99729SLuis R. Rodriguez queue_regulatory_request(request); 22635078b2e3SLuis R. Rodriguez 2264fe33eb39SLuis R. Rodriguez return 0; 2265ba25c141SLuis R. Rodriguez } 2266ba25c141SLuis R. Rodriguez 2267fe33eb39SLuis R. Rodriguez /* User hints */ 226857b5ce07SLuis R. Rodriguez int regulatory_hint_user(const char *alpha2, 226957b5ce07SLuis R. Rodriguez enum nl80211_user_reg_hint_type user_reg_hint_type) 2270b2e1b302SLuis R. Rodriguez { 2271fe33eb39SLuis R. Rodriguez struct regulatory_request *request; 2272fe33eb39SLuis R. Rodriguez 2273fdc9d7b2SJohannes Berg if (WARN_ON(!alpha2)) 2274fdc9d7b2SJohannes Berg return -EINVAL; 2275b2e1b302SLuis R. Rodriguez 2276fe33eb39SLuis R. Rodriguez request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); 2277fe33eb39SLuis R. Rodriguez if (!request) 2278fe33eb39SLuis R. Rodriguez return -ENOMEM; 2279fe33eb39SLuis R. Rodriguez 2280f4173766SJohannes Berg request->wiphy_idx = WIPHY_IDX_INVALID; 2281fe33eb39SLuis R. Rodriguez request->alpha2[0] = alpha2[0]; 2282fe33eb39SLuis R. Rodriguez request->alpha2[1] = alpha2[1]; 2283e12822e1SLuis R. Rodriguez request->initiator = NL80211_REGDOM_SET_BY_USER; 228457b5ce07SLuis R. Rodriguez request->user_reg_hint_type = user_reg_hint_type; 2285fe33eb39SLuis R. Rodriguez 2286fe33eb39SLuis R. Rodriguez queue_regulatory_request(request); 2287fe33eb39SLuis R. Rodriguez 2288fe33eb39SLuis R. Rodriguez return 0; 2289fe33eb39SLuis R. Rodriguez } 2290fe33eb39SLuis R. Rodriguez 229152616f2bSIlan Peer int regulatory_hint_indoor_user(void) 229252616f2bSIlan Peer { 229352616f2bSIlan Peer 229452616f2bSIlan Peer 22950c4ddcd2SIlan peer reg_is_indoor = true; 229652616f2bSIlan Peer 229752616f2bSIlan Peer return 0; 229852616f2bSIlan Peer } 229952616f2bSIlan Peer 2300fe33eb39SLuis R. Rodriguez /* Driver hints */ 2301fe33eb39SLuis R. Rodriguez int regulatory_hint(struct wiphy *wiphy, const char *alpha2) 2302fe33eb39SLuis R. Rodriguez { 2303fe33eb39SLuis R. Rodriguez struct regulatory_request *request; 2304fe33eb39SLuis R. Rodriguez 2305fdc9d7b2SJohannes Berg if (WARN_ON(!alpha2 || !wiphy)) 2306fdc9d7b2SJohannes Berg return -EINVAL; 2307fe33eb39SLuis R. Rodriguez 23084f7b9140SLuis R. Rodriguez wiphy->regulatory_flags &= ~REGULATORY_CUSTOM_REG; 23094f7b9140SLuis R. Rodriguez 2310fe33eb39SLuis R. Rodriguez request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); 2311fe33eb39SLuis R. Rodriguez if (!request) 2312fe33eb39SLuis R. Rodriguez return -ENOMEM; 2313fe33eb39SLuis R. Rodriguez 2314fe33eb39SLuis R. Rodriguez request->wiphy_idx = get_wiphy_idx(wiphy); 2315fe33eb39SLuis R. Rodriguez 2316fe33eb39SLuis R. Rodriguez request->alpha2[0] = alpha2[0]; 2317fe33eb39SLuis R. Rodriguez request->alpha2[1] = alpha2[1]; 23187db90f4aSLuis R. Rodriguez request->initiator = NL80211_REGDOM_SET_BY_DRIVER; 2319fe33eb39SLuis R. Rodriguez 2320fe33eb39SLuis R. Rodriguez queue_regulatory_request(request); 2321fe33eb39SLuis R. Rodriguez 2322fe33eb39SLuis R. Rodriguez return 0; 2323b2e1b302SLuis R. Rodriguez } 2324b2e1b302SLuis R. Rodriguez EXPORT_SYMBOL(regulatory_hint); 2325b2e1b302SLuis R. Rodriguez 2326789fd033SLuis R. Rodriguez void regulatory_hint_country_ie(struct wiphy *wiphy, enum ieee80211_band band, 23271a919318SJohannes Berg const u8 *country_ie, u8 country_ie_len) 23283f2355cbSLuis R. Rodriguez { 23293f2355cbSLuis R. Rodriguez char alpha2[2]; 23303f2355cbSLuis R. Rodriguez enum environment_cap env = ENVIRON_ANY; 2331db2424c5SJohannes Berg struct regulatory_request *request = NULL, *lr; 2332d335fe63SLuis R. Rodriguez 23333f2355cbSLuis R. Rodriguez /* IE len must be evenly divisible by 2 */ 23343f2355cbSLuis R. Rodriguez if (country_ie_len & 0x01) 2335db2424c5SJohannes Berg return; 23363f2355cbSLuis R. Rodriguez 23373f2355cbSLuis R. Rodriguez if (country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN) 2338db2424c5SJohannes Berg return; 2339db2424c5SJohannes Berg 2340db2424c5SJohannes Berg request = kzalloc(sizeof(*request), GFP_KERNEL); 2341db2424c5SJohannes Berg if (!request) 2342db2424c5SJohannes Berg return; 23433f2355cbSLuis R. Rodriguez 23443f2355cbSLuis R. Rodriguez alpha2[0] = country_ie[0]; 23453f2355cbSLuis R. Rodriguez alpha2[1] = country_ie[1]; 23463f2355cbSLuis R. Rodriguez 23473f2355cbSLuis R. Rodriguez if (country_ie[2] == 'I') 23483f2355cbSLuis R. Rodriguez env = ENVIRON_INDOOR; 23493f2355cbSLuis R. Rodriguez else if (country_ie[2] == 'O') 23503f2355cbSLuis R. Rodriguez env = ENVIRON_OUTDOOR; 23513f2355cbSLuis R. Rodriguez 2352db2424c5SJohannes Berg rcu_read_lock(); 2353db2424c5SJohannes Berg lr = get_last_request(); 2354db2424c5SJohannes Berg 2355db2424c5SJohannes Berg if (unlikely(!lr)) 2356db2424c5SJohannes Berg goto out; 2357db2424c5SJohannes Berg 2358fb1fc7adSLuis R. Rodriguez /* 23598b19e6caSLuis R. Rodriguez * We will run this only upon a successful connection on cfg80211. 23604b44c8bcSLuis R. Rodriguez * We leave conflict resolution to the workqueue, where can hold 23615fe231e8SJohannes Berg * the RTNL. 2362fb1fc7adSLuis R. Rodriguez */ 2363c492db37SJohannes Berg if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE && 2364c492db37SJohannes Berg lr->wiphy_idx != WIPHY_IDX_INVALID) 23653f2355cbSLuis R. Rodriguez goto out; 23663f2355cbSLuis R. Rodriguez 2367fe33eb39SLuis R. Rodriguez request->wiphy_idx = get_wiphy_idx(wiphy); 23684f366c5dSJohn W. Linville request->alpha2[0] = alpha2[0]; 23694f366c5dSJohn W. Linville request->alpha2[1] = alpha2[1]; 23707db90f4aSLuis R. Rodriguez request->initiator = NL80211_REGDOM_SET_BY_COUNTRY_IE; 2371fe33eb39SLuis R. Rodriguez request->country_ie_env = env; 23723f2355cbSLuis R. Rodriguez 2373fe33eb39SLuis R. Rodriguez queue_regulatory_request(request); 2374db2424c5SJohannes Berg request = NULL; 23753f2355cbSLuis R. Rodriguez out: 2376db2424c5SJohannes Berg kfree(request); 2377db2424c5SJohannes Berg rcu_read_unlock(); 23783f2355cbSLuis R. Rodriguez } 2379b2e1b302SLuis R. Rodriguez 238009d989d1SLuis R. Rodriguez static void restore_alpha2(char *alpha2, bool reset_user) 238109d989d1SLuis R. Rodriguez { 238209d989d1SLuis R. Rodriguez /* indicates there is no alpha2 to consider for restoration */ 238309d989d1SLuis R. Rodriguez alpha2[0] = '9'; 238409d989d1SLuis R. Rodriguez alpha2[1] = '7'; 238509d989d1SLuis R. Rodriguez 238609d989d1SLuis R. Rodriguez /* The user setting has precedence over the module parameter */ 238709d989d1SLuis R. Rodriguez if (is_user_regdom_saved()) { 238809d989d1SLuis R. Rodriguez /* Unless we're asked to ignore it and reset it */ 238909d989d1SLuis R. Rodriguez if (reset_user) { 23901a919318SJohannes Berg REG_DBG_PRINT("Restoring regulatory settings including user preference\n"); 239109d989d1SLuis R. Rodriguez user_alpha2[0] = '9'; 239209d989d1SLuis R. Rodriguez user_alpha2[1] = '7'; 239309d989d1SLuis R. Rodriguez 239409d989d1SLuis R. Rodriguez /* 239509d989d1SLuis R. Rodriguez * If we're ignoring user settings, we still need to 239609d989d1SLuis R. Rodriguez * check the module parameter to ensure we put things 239709d989d1SLuis R. Rodriguez * back as they were for a full restore. 239809d989d1SLuis R. Rodriguez */ 239909d989d1SLuis R. Rodriguez if (!is_world_regdom(ieee80211_regdom)) { 24001a919318SJohannes Berg REG_DBG_PRINT("Keeping preference on module parameter ieee80211_regdom: %c%c\n", 24011a919318SJohannes Berg ieee80211_regdom[0], ieee80211_regdom[1]); 240209d989d1SLuis R. Rodriguez alpha2[0] = ieee80211_regdom[0]; 240309d989d1SLuis R. Rodriguez alpha2[1] = ieee80211_regdom[1]; 240409d989d1SLuis R. Rodriguez } 240509d989d1SLuis R. Rodriguez } else { 24061a919318SJohannes Berg REG_DBG_PRINT("Restoring regulatory settings while preserving user preference for: %c%c\n", 24071a919318SJohannes Berg user_alpha2[0], user_alpha2[1]); 240809d989d1SLuis R. Rodriguez alpha2[0] = user_alpha2[0]; 240909d989d1SLuis R. Rodriguez alpha2[1] = user_alpha2[1]; 241009d989d1SLuis R. Rodriguez } 241109d989d1SLuis R. Rodriguez } else if (!is_world_regdom(ieee80211_regdom)) { 24121a919318SJohannes Berg REG_DBG_PRINT("Keeping preference on module parameter ieee80211_regdom: %c%c\n", 24131a919318SJohannes Berg ieee80211_regdom[0], ieee80211_regdom[1]); 241409d989d1SLuis R. Rodriguez alpha2[0] = ieee80211_regdom[0]; 241509d989d1SLuis R. Rodriguez alpha2[1] = ieee80211_regdom[1]; 241609d989d1SLuis R. Rodriguez } else 2417d91e41b6SLuis R. Rodriguez REG_DBG_PRINT("Restoring regulatory settings\n"); 241809d989d1SLuis R. Rodriguez } 241909d989d1SLuis R. Rodriguez 24205ce543d1SRajkumar Manoharan static void restore_custom_reg_settings(struct wiphy *wiphy) 24215ce543d1SRajkumar Manoharan { 24225ce543d1SRajkumar Manoharan struct ieee80211_supported_band *sband; 24235ce543d1SRajkumar Manoharan enum ieee80211_band band; 24245ce543d1SRajkumar Manoharan struct ieee80211_channel *chan; 24255ce543d1SRajkumar Manoharan int i; 24265ce543d1SRajkumar Manoharan 24275ce543d1SRajkumar Manoharan for (band = 0; band < IEEE80211_NUM_BANDS; band++) { 24285ce543d1SRajkumar Manoharan sband = wiphy->bands[band]; 24295ce543d1SRajkumar Manoharan if (!sband) 24305ce543d1SRajkumar Manoharan continue; 24315ce543d1SRajkumar Manoharan for (i = 0; i < sband->n_channels; i++) { 24325ce543d1SRajkumar Manoharan chan = &sband->channels[i]; 24335ce543d1SRajkumar Manoharan chan->flags = chan->orig_flags; 24345ce543d1SRajkumar Manoharan chan->max_antenna_gain = chan->orig_mag; 24355ce543d1SRajkumar Manoharan chan->max_power = chan->orig_mpwr; 2436899852afSPaul Stewart chan->beacon_found = false; 24375ce543d1SRajkumar Manoharan } 24385ce543d1SRajkumar Manoharan } 24395ce543d1SRajkumar Manoharan } 24405ce543d1SRajkumar Manoharan 244109d989d1SLuis R. Rodriguez /* 244209d989d1SLuis R. Rodriguez * Restoring regulatory settings involves ingoring any 244309d989d1SLuis R. Rodriguez * possibly stale country IE information and user regulatory 244409d989d1SLuis R. Rodriguez * settings if so desired, this includes any beacon hints 244509d989d1SLuis R. Rodriguez * learned as we could have traveled outside to another country 244609d989d1SLuis R. Rodriguez * after disconnection. To restore regulatory settings we do 244709d989d1SLuis R. Rodriguez * exactly what we did at bootup: 244809d989d1SLuis R. Rodriguez * 244909d989d1SLuis R. Rodriguez * - send a core regulatory hint 245009d989d1SLuis R. Rodriguez * - send a user regulatory hint if applicable 245109d989d1SLuis R. Rodriguez * 245209d989d1SLuis R. Rodriguez * Device drivers that send a regulatory hint for a specific country 245309d989d1SLuis R. Rodriguez * keep their own regulatory domain on wiphy->regd so that does does 245409d989d1SLuis R. Rodriguez * not need to be remembered. 245509d989d1SLuis R. Rodriguez */ 245609d989d1SLuis R. Rodriguez static void restore_regulatory_settings(bool reset_user) 245709d989d1SLuis R. Rodriguez { 245809d989d1SLuis R. Rodriguez char alpha2[2]; 2459cee0bec5SDmitry Shmidt char world_alpha2[2]; 246009d989d1SLuis R. Rodriguez struct reg_beacon *reg_beacon, *btmp; 246114609555SLuis R. Rodriguez struct regulatory_request *reg_request, *tmp; 246214609555SLuis R. Rodriguez LIST_HEAD(tmp_reg_req_list); 24635ce543d1SRajkumar Manoharan struct cfg80211_registered_device *rdev; 246409d989d1SLuis R. Rodriguez 24655fe231e8SJohannes Berg ASSERT_RTNL(); 24665fe231e8SJohannes Berg 246752616f2bSIlan Peer reg_is_indoor = false; 246852616f2bSIlan Peer 24692d319867SJohannes Berg reset_regdomains(true, &world_regdom); 247009d989d1SLuis R. Rodriguez restore_alpha2(alpha2, reset_user); 247109d989d1SLuis R. Rodriguez 247214609555SLuis R. Rodriguez /* 247314609555SLuis R. Rodriguez * If there's any pending requests we simply 247414609555SLuis R. Rodriguez * stash them to a temporary pending queue and 247514609555SLuis R. Rodriguez * add then after we've restored regulatory 247614609555SLuis R. Rodriguez * settings. 247714609555SLuis R. Rodriguez */ 247814609555SLuis R. Rodriguez spin_lock(®_requests_lock); 2479fea9bcedSJohannes Berg list_for_each_entry_safe(reg_request, tmp, ®_requests_list, list) { 2480fea9bcedSJohannes Berg if (reg_request->initiator != NL80211_REGDOM_SET_BY_USER) 248114609555SLuis R. Rodriguez continue; 248200a9ac4cSWei Yongjun list_move_tail(®_request->list, &tmp_reg_req_list); 248314609555SLuis R. Rodriguez } 248414609555SLuis R. Rodriguez spin_unlock(®_requests_lock); 248514609555SLuis R. Rodriguez 248609d989d1SLuis R. Rodriguez /* Clear beacon hints */ 248709d989d1SLuis R. Rodriguez spin_lock_bh(®_pending_beacons_lock); 2488fea9bcedSJohannes Berg list_for_each_entry_safe(reg_beacon, btmp, ®_pending_beacons, list) { 248909d989d1SLuis R. Rodriguez list_del(®_beacon->list); 249009d989d1SLuis R. Rodriguez kfree(reg_beacon); 249109d989d1SLuis R. Rodriguez } 249209d989d1SLuis R. Rodriguez spin_unlock_bh(®_pending_beacons_lock); 249309d989d1SLuis R. Rodriguez 2494fea9bcedSJohannes Berg list_for_each_entry_safe(reg_beacon, btmp, ®_beacon_list, list) { 249509d989d1SLuis R. Rodriguez list_del(®_beacon->list); 249609d989d1SLuis R. Rodriguez kfree(reg_beacon); 249709d989d1SLuis R. Rodriguez } 249809d989d1SLuis R. Rodriguez 249909d989d1SLuis R. Rodriguez /* First restore to the basic regulatory settings */ 2500379b82f4SJohannes Berg world_alpha2[0] = cfg80211_world_regdom->alpha2[0]; 2501379b82f4SJohannes Berg world_alpha2[1] = cfg80211_world_regdom->alpha2[1]; 250209d989d1SLuis R. Rodriguez 25035ce543d1SRajkumar Manoharan list_for_each_entry(rdev, &cfg80211_rdev_list, list) { 2504b0d7aa59SJonathan Doron if (rdev->wiphy.regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) 2505b0d7aa59SJonathan Doron continue; 2506a2f73b6cSLuis R. Rodriguez if (rdev->wiphy.regulatory_flags & REGULATORY_CUSTOM_REG) 25075ce543d1SRajkumar Manoharan restore_custom_reg_settings(&rdev->wiphy); 25085ce543d1SRajkumar Manoharan } 25095ce543d1SRajkumar Manoharan 2510cee0bec5SDmitry Shmidt regulatory_hint_core(world_alpha2); 251109d989d1SLuis R. Rodriguez 251209d989d1SLuis R. Rodriguez /* 251309d989d1SLuis R. Rodriguez * This restores the ieee80211_regdom module parameter 251409d989d1SLuis R. Rodriguez * preference or the last user requested regulatory 251509d989d1SLuis R. Rodriguez * settings, user regulatory settings takes precedence. 251609d989d1SLuis R. Rodriguez */ 251709d989d1SLuis R. Rodriguez if (is_an_alpha2(alpha2)) 251857b5ce07SLuis R. Rodriguez regulatory_hint_user(user_alpha2, NL80211_USER_REG_HINT_USER); 251909d989d1SLuis R. Rodriguez 252014609555SLuis R. Rodriguez spin_lock(®_requests_lock); 252111cff96cSJohannes Berg list_splice_tail_init(&tmp_reg_req_list, ®_requests_list); 252214609555SLuis R. Rodriguez spin_unlock(®_requests_lock); 252314609555SLuis R. Rodriguez 252414609555SLuis R. Rodriguez REG_DBG_PRINT("Kicking the queue\n"); 252514609555SLuis R. Rodriguez 252614609555SLuis R. Rodriguez schedule_work(®_work); 252714609555SLuis R. Rodriguez } 252809d989d1SLuis R. Rodriguez 252909d989d1SLuis R. Rodriguez void regulatory_hint_disconnect(void) 253009d989d1SLuis R. Rodriguez { 25311a919318SJohannes Berg REG_DBG_PRINT("All devices are disconnected, going to restore regulatory settings\n"); 253209d989d1SLuis R. Rodriguez restore_regulatory_settings(false); 253309d989d1SLuis R. Rodriguez } 253409d989d1SLuis R. Rodriguez 2535e38f8a7aSLuis R. Rodriguez static bool freq_is_chan_12_13_14(u16 freq) 2536e38f8a7aSLuis R. Rodriguez { 253759eb21a6SBruno Randolf if (freq == ieee80211_channel_to_frequency(12, IEEE80211_BAND_2GHZ) || 253859eb21a6SBruno Randolf freq == ieee80211_channel_to_frequency(13, IEEE80211_BAND_2GHZ) || 253959eb21a6SBruno Randolf freq == ieee80211_channel_to_frequency(14, IEEE80211_BAND_2GHZ)) 2540e38f8a7aSLuis R. Rodriguez return true; 2541e38f8a7aSLuis R. Rodriguez return false; 2542e38f8a7aSLuis R. Rodriguez } 2543e38f8a7aSLuis R. Rodriguez 25443ebfa6e7SLuis R. Rodriguez static bool pending_reg_beacon(struct ieee80211_channel *beacon_chan) 25453ebfa6e7SLuis R. Rodriguez { 25463ebfa6e7SLuis R. Rodriguez struct reg_beacon *pending_beacon; 25473ebfa6e7SLuis R. Rodriguez 25483ebfa6e7SLuis R. Rodriguez list_for_each_entry(pending_beacon, ®_pending_beacons, list) 25493ebfa6e7SLuis R. Rodriguez if (beacon_chan->center_freq == 25503ebfa6e7SLuis R. Rodriguez pending_beacon->chan.center_freq) 25513ebfa6e7SLuis R. Rodriguez return true; 25523ebfa6e7SLuis R. Rodriguez return false; 25533ebfa6e7SLuis R. Rodriguez } 25543ebfa6e7SLuis R. Rodriguez 2555e38f8a7aSLuis R. Rodriguez int regulatory_hint_found_beacon(struct wiphy *wiphy, 2556e38f8a7aSLuis R. Rodriguez struct ieee80211_channel *beacon_chan, 2557e38f8a7aSLuis R. Rodriguez gfp_t gfp) 2558e38f8a7aSLuis R. Rodriguez { 2559e38f8a7aSLuis R. Rodriguez struct reg_beacon *reg_beacon; 25603ebfa6e7SLuis R. Rodriguez bool processing; 2561e38f8a7aSLuis R. Rodriguez 25621a919318SJohannes Berg if (beacon_chan->beacon_found || 25631a919318SJohannes Berg beacon_chan->flags & IEEE80211_CHAN_RADAR || 2564e38f8a7aSLuis R. Rodriguez (beacon_chan->band == IEEE80211_BAND_2GHZ && 25651a919318SJohannes Berg !freq_is_chan_12_13_14(beacon_chan->center_freq))) 2566e38f8a7aSLuis R. Rodriguez return 0; 2567e38f8a7aSLuis R. Rodriguez 25683ebfa6e7SLuis R. Rodriguez spin_lock_bh(®_pending_beacons_lock); 25693ebfa6e7SLuis R. Rodriguez processing = pending_reg_beacon(beacon_chan); 25703ebfa6e7SLuis R. Rodriguez spin_unlock_bh(®_pending_beacons_lock); 25713ebfa6e7SLuis R. Rodriguez 25723ebfa6e7SLuis R. Rodriguez if (processing) 2573e38f8a7aSLuis R. Rodriguez return 0; 2574e38f8a7aSLuis R. Rodriguez 2575e38f8a7aSLuis R. Rodriguez reg_beacon = kzalloc(sizeof(struct reg_beacon), gfp); 2576e38f8a7aSLuis R. Rodriguez if (!reg_beacon) 2577e38f8a7aSLuis R. Rodriguez return -ENOMEM; 2578e38f8a7aSLuis R. Rodriguez 25791a919318SJohannes Berg REG_DBG_PRINT("Found new beacon on frequency: %d MHz (Ch %d) on %s\n", 2580e38f8a7aSLuis R. Rodriguez beacon_chan->center_freq, 2581e38f8a7aSLuis R. Rodriguez ieee80211_frequency_to_channel(beacon_chan->center_freq), 2582e38f8a7aSLuis R. Rodriguez wiphy_name(wiphy)); 25834113f751SLuis R. Rodriguez 2584e38f8a7aSLuis R. Rodriguez memcpy(®_beacon->chan, beacon_chan, 2585e38f8a7aSLuis R. Rodriguez sizeof(struct ieee80211_channel)); 2586e38f8a7aSLuis R. Rodriguez 2587e38f8a7aSLuis R. Rodriguez /* 2588e38f8a7aSLuis R. Rodriguez * Since we can be called from BH or and non-BH context 2589e38f8a7aSLuis R. Rodriguez * we must use spin_lock_bh() 2590e38f8a7aSLuis R. Rodriguez */ 2591e38f8a7aSLuis R. Rodriguez spin_lock_bh(®_pending_beacons_lock); 2592e38f8a7aSLuis R. Rodriguez list_add_tail(®_beacon->list, ®_pending_beacons); 2593e38f8a7aSLuis R. Rodriguez spin_unlock_bh(®_pending_beacons_lock); 2594e38f8a7aSLuis R. Rodriguez 2595e38f8a7aSLuis R. Rodriguez schedule_work(®_work); 2596e38f8a7aSLuis R. Rodriguez 2597e38f8a7aSLuis R. Rodriguez return 0; 2598e38f8a7aSLuis R. Rodriguez } 2599e38f8a7aSLuis R. Rodriguez 2600a3d2eaf0SJohannes Berg static void print_rd_rules(const struct ieee80211_regdomain *rd) 2601b2e1b302SLuis R. Rodriguez { 2602b2e1b302SLuis R. Rodriguez unsigned int i; 2603a3d2eaf0SJohannes Berg const struct ieee80211_reg_rule *reg_rule = NULL; 2604a3d2eaf0SJohannes Berg const struct ieee80211_freq_range *freq_range = NULL; 2605a3d2eaf0SJohannes Berg const struct ieee80211_power_rule *power_rule = NULL; 2606089027e5SJanusz Dziedzic char bw[32], cac_time[32]; 2607b2e1b302SLuis R. Rodriguez 2608089027e5SJanusz Dziedzic pr_info(" (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp), (dfs_cac_time)\n"); 2609b2e1b302SLuis R. Rodriguez 2610b2e1b302SLuis R. Rodriguez for (i = 0; i < rd->n_reg_rules; i++) { 2611b2e1b302SLuis R. Rodriguez reg_rule = &rd->reg_rules[i]; 2612b2e1b302SLuis R. Rodriguez freq_range = ®_rule->freq_range; 2613b2e1b302SLuis R. Rodriguez power_rule = ®_rule->power_rule; 2614b2e1b302SLuis R. Rodriguez 2615b0dfd2eaSJanusz Dziedzic if (reg_rule->flags & NL80211_RRF_AUTO_BW) 2616b0dfd2eaSJanusz Dziedzic snprintf(bw, sizeof(bw), "%d KHz, %d KHz AUTO", 2617b0dfd2eaSJanusz Dziedzic freq_range->max_bandwidth_khz, 261897524820SJanusz Dziedzic reg_get_max_bandwidth(rd, reg_rule)); 261997524820SJanusz Dziedzic else 2620b0dfd2eaSJanusz Dziedzic snprintf(bw, sizeof(bw), "%d KHz", 262197524820SJanusz Dziedzic freq_range->max_bandwidth_khz); 262297524820SJanusz Dziedzic 2623089027e5SJanusz Dziedzic if (reg_rule->flags & NL80211_RRF_DFS) 2624089027e5SJanusz Dziedzic scnprintf(cac_time, sizeof(cac_time), "%u s", 2625089027e5SJanusz Dziedzic reg_rule->dfs_cac_ms/1000); 2626089027e5SJanusz Dziedzic else 2627089027e5SJanusz Dziedzic scnprintf(cac_time, sizeof(cac_time), "N/A"); 2628089027e5SJanusz Dziedzic 2629089027e5SJanusz Dziedzic 2630fb1fc7adSLuis R. Rodriguez /* 2631fb1fc7adSLuis R. Rodriguez * There may not be documentation for max antenna gain 2632fb1fc7adSLuis R. Rodriguez * in certain regions 2633fb1fc7adSLuis R. Rodriguez */ 2634b2e1b302SLuis R. Rodriguez if (power_rule->max_antenna_gain) 2635089027e5SJanusz Dziedzic pr_info(" (%d KHz - %d KHz @ %s), (%d mBi, %d mBm), (%s)\n", 2636b2e1b302SLuis R. Rodriguez freq_range->start_freq_khz, 2637b2e1b302SLuis R. Rodriguez freq_range->end_freq_khz, 263897524820SJanusz Dziedzic bw, 2639b2e1b302SLuis R. Rodriguez power_rule->max_antenna_gain, 2640089027e5SJanusz Dziedzic power_rule->max_eirp, 2641089027e5SJanusz Dziedzic cac_time); 2642b2e1b302SLuis R. Rodriguez else 2643089027e5SJanusz Dziedzic pr_info(" (%d KHz - %d KHz @ %s), (N/A, %d mBm), (%s)\n", 2644b2e1b302SLuis R. Rodriguez freq_range->start_freq_khz, 2645b2e1b302SLuis R. Rodriguez freq_range->end_freq_khz, 264697524820SJanusz Dziedzic bw, 2647089027e5SJanusz Dziedzic power_rule->max_eirp, 2648089027e5SJanusz Dziedzic cac_time); 2649b2e1b302SLuis R. Rodriguez } 2650b2e1b302SLuis R. Rodriguez } 2651b2e1b302SLuis R. Rodriguez 26524c7d3982SLuis R. Rodriguez bool reg_supported_dfs_region(enum nl80211_dfs_regions dfs_region) 26538b60b078SLuis R. Rodriguez { 26548b60b078SLuis R. Rodriguez switch (dfs_region) { 26558b60b078SLuis R. Rodriguez case NL80211_DFS_UNSET: 26568b60b078SLuis R. Rodriguez case NL80211_DFS_FCC: 26578b60b078SLuis R. Rodriguez case NL80211_DFS_ETSI: 26588b60b078SLuis R. Rodriguez case NL80211_DFS_JP: 26598b60b078SLuis R. Rodriguez return true; 26608b60b078SLuis R. Rodriguez default: 26618b60b078SLuis R. Rodriguez REG_DBG_PRINT("Ignoring uknown DFS master region: %d\n", 26628b60b078SLuis R. Rodriguez dfs_region); 26638b60b078SLuis R. Rodriguez return false; 26648b60b078SLuis R. Rodriguez } 26658b60b078SLuis R. Rodriguez } 26668b60b078SLuis R. Rodriguez 2667a3d2eaf0SJohannes Berg static void print_regdomain(const struct ieee80211_regdomain *rd) 2668b2e1b302SLuis R. Rodriguez { 2669c492db37SJohannes Berg struct regulatory_request *lr = get_last_request(); 2670b2e1b302SLuis R. Rodriguez 26713f2355cbSLuis R. Rodriguez if (is_intersected_alpha2(rd->alpha2)) { 2672c492db37SJohannes Berg if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) { 267379c97e97SJohannes Berg struct cfg80211_registered_device *rdev; 2674c492db37SJohannes Berg rdev = cfg80211_rdev_by_wiphy_idx(lr->wiphy_idx); 267579c97e97SJohannes Berg if (rdev) { 2676e9c0268fSJoe Perches pr_info("Current regulatory domain updated by AP to: %c%c\n", 267779c97e97SJohannes Berg rdev->country_ie_alpha2[0], 267879c97e97SJohannes Berg rdev->country_ie_alpha2[1]); 26793f2355cbSLuis R. Rodriguez } else 2680e9c0268fSJoe Perches pr_info("Current regulatory domain intersected:\n"); 26813f2355cbSLuis R. Rodriguez } else 2682e9c0268fSJoe Perches pr_info("Current regulatory domain intersected:\n"); 26831a919318SJohannes Berg } else if (is_world_regdom(rd->alpha2)) { 2684e9c0268fSJoe Perches pr_info("World regulatory domain updated:\n"); 26851a919318SJohannes Berg } else { 2686b2e1b302SLuis R. Rodriguez if (is_unknown_alpha2(rd->alpha2)) 2687e9c0268fSJoe Perches pr_info("Regulatory domain changed to driver built-in settings (unknown country)\n"); 268857b5ce07SLuis R. Rodriguez else { 2689c492db37SJohannes Berg if (reg_request_cell_base(lr)) 26901a919318SJohannes Berg pr_info("Regulatory domain changed to country: %c%c by Cell Station\n", 2691b2e1b302SLuis R. Rodriguez rd->alpha2[0], rd->alpha2[1]); 269257b5ce07SLuis R. Rodriguez else 26931a919318SJohannes Berg pr_info("Regulatory domain changed to country: %c%c\n", 269457b5ce07SLuis R. Rodriguez rd->alpha2[0], rd->alpha2[1]); 269557b5ce07SLuis R. Rodriguez } 2696b2e1b302SLuis R. Rodriguez } 26971a919318SJohannes Berg 26983ef121b5SLuis R. Rodriguez pr_info(" DFS Master region: %s", reg_dfs_region_str(rd->dfs_region)); 2699b2e1b302SLuis R. Rodriguez print_rd_rules(rd); 2700b2e1b302SLuis R. Rodriguez } 2701b2e1b302SLuis R. Rodriguez 27022df78167SJohannes Berg static void print_regdomain_info(const struct ieee80211_regdomain *rd) 2703b2e1b302SLuis R. Rodriguez { 2704e9c0268fSJoe Perches pr_info("Regulatory domain: %c%c\n", rd->alpha2[0], rd->alpha2[1]); 2705b2e1b302SLuis R. Rodriguez print_rd_rules(rd); 2706b2e1b302SLuis R. Rodriguez } 2707b2e1b302SLuis R. Rodriguez 27083b9e5acaSLuis R. Rodriguez static int reg_set_rd_core(const struct ieee80211_regdomain *rd) 27093b9e5acaSLuis R. Rodriguez { 27103b9e5acaSLuis R. Rodriguez if (!is_world_regdom(rd->alpha2)) 27113b9e5acaSLuis R. Rodriguez return -EINVAL; 27123b9e5acaSLuis R. Rodriguez update_world_regdomain(rd); 27133b9e5acaSLuis R. Rodriguez return 0; 27143b9e5acaSLuis R. Rodriguez } 27153b9e5acaSLuis R. Rodriguez 271684721d44SLuis R. Rodriguez static int reg_set_rd_user(const struct ieee80211_regdomain *rd, 271784721d44SLuis R. Rodriguez struct regulatory_request *user_request) 271884721d44SLuis R. Rodriguez { 271984721d44SLuis R. Rodriguez const struct ieee80211_regdomain *intersected_rd = NULL; 272084721d44SLuis R. Rodriguez 272184721d44SLuis R. Rodriguez if (!regdom_changes(rd->alpha2)) 272284721d44SLuis R. Rodriguez return -EALREADY; 272384721d44SLuis R. Rodriguez 272484721d44SLuis R. Rodriguez if (!is_valid_rd(rd)) { 272584721d44SLuis R. Rodriguez pr_err("Invalid regulatory domain detected:\n"); 272684721d44SLuis R. Rodriguez print_regdomain_info(rd); 272784721d44SLuis R. Rodriguez return -EINVAL; 272884721d44SLuis R. Rodriguez } 272984721d44SLuis R. Rodriguez 273084721d44SLuis R. Rodriguez if (!user_request->intersect) { 273184721d44SLuis R. Rodriguez reset_regdomains(false, rd); 273284721d44SLuis R. Rodriguez return 0; 273384721d44SLuis R. Rodriguez } 273484721d44SLuis R. Rodriguez 273584721d44SLuis R. Rodriguez intersected_rd = regdom_intersect(rd, get_cfg80211_regdom()); 273684721d44SLuis R. Rodriguez if (!intersected_rd) 273784721d44SLuis R. Rodriguez return -EINVAL; 273884721d44SLuis R. Rodriguez 273984721d44SLuis R. Rodriguez kfree(rd); 274084721d44SLuis R. Rodriguez rd = NULL; 274184721d44SLuis R. Rodriguez reset_regdomains(false, intersected_rd); 274284721d44SLuis R. Rodriguez 274384721d44SLuis R. Rodriguez return 0; 274484721d44SLuis R. Rodriguez } 274584721d44SLuis R. Rodriguez 2746f5fe3247SLuis R. Rodriguez static int reg_set_rd_driver(const struct ieee80211_regdomain *rd, 2747f5fe3247SLuis R. Rodriguez struct regulatory_request *driver_request) 2748b2e1b302SLuis R. Rodriguez { 2749e9763c3cSJohannes Berg const struct ieee80211_regdomain *regd; 27509c96477dSLuis R. Rodriguez const struct ieee80211_regdomain *intersected_rd = NULL; 2751f5fe3247SLuis R. Rodriguez const struct ieee80211_regdomain *tmp; 2752806a9e39SLuis R. Rodriguez struct wiphy *request_wiphy; 27536913b49aSJohannes Berg 2754f5fe3247SLuis R. Rodriguez if (is_world_regdom(rd->alpha2)) 2755b2e1b302SLuis R. Rodriguez return -EINVAL; 2756b2e1b302SLuis R. Rodriguez 2757baeb66feSJohn W. Linville if (!regdom_changes(rd->alpha2)) 275895908535SKalle Valo return -EALREADY; 2759b2e1b302SLuis R. Rodriguez 2760b2e1b302SLuis R. Rodriguez if (!is_valid_rd(rd)) { 2761e9c0268fSJoe Perches pr_err("Invalid regulatory domain detected:\n"); 2762b2e1b302SLuis R. Rodriguez print_regdomain_info(rd); 2763b2e1b302SLuis R. Rodriguez return -EINVAL; 2764b2e1b302SLuis R. Rodriguez } 2765b2e1b302SLuis R. Rodriguez 2766f5fe3247SLuis R. Rodriguez request_wiphy = wiphy_idx_to_wiphy(driver_request->wiphy_idx); 2767f5fe3247SLuis R. Rodriguez if (!request_wiphy) { 2768845f3351SShaibal Dutta queue_delayed_work(system_power_efficient_wq, 2769845f3351SShaibal Dutta ®_timeout, 0); 2770de3584bdSJohannes Berg return -ENODEV; 2771de3584bdSJohannes Berg } 2772806a9e39SLuis R. Rodriguez 2773f5fe3247SLuis R. Rodriguez if (!driver_request->intersect) { 2774558f6d32SLuis R. Rodriguez if (request_wiphy->regd) 2775558f6d32SLuis R. Rodriguez return -EALREADY; 27763e0c3ff3SLuis R. Rodriguez 2777e9763c3cSJohannes Berg regd = reg_copy_regd(rd); 2778e9763c3cSJohannes Berg if (IS_ERR(regd)) 2779e9763c3cSJohannes Berg return PTR_ERR(regd); 27803e0c3ff3SLuis R. Rodriguez 2781458f4f9eSJohannes Berg rcu_assign_pointer(request_wiphy->regd, regd); 2782379b82f4SJohannes Berg reset_regdomains(false, rd); 2783b8295acdSLuis R. Rodriguez return 0; 2784b8295acdSLuis R. Rodriguez } 2785b8295acdSLuis R. Rodriguez 2786458f4f9eSJohannes Berg intersected_rd = regdom_intersect(rd, get_cfg80211_regdom()); 27879c96477dSLuis R. Rodriguez if (!intersected_rd) 27889c96477dSLuis R. Rodriguez return -EINVAL; 2789b8295acdSLuis R. Rodriguez 2790fb1fc7adSLuis R. Rodriguez /* 2791fb1fc7adSLuis R. Rodriguez * We can trash what CRDA provided now. 27923e0c3ff3SLuis R. Rodriguez * However if a driver requested this specific regulatory 2793fb1fc7adSLuis R. Rodriguez * domain we keep it for its private use 2794fb1fc7adSLuis R. Rodriguez */ 2795b7566fc3SLarry Finger tmp = get_wiphy_regdom(request_wiphy); 2796458f4f9eSJohannes Berg rcu_assign_pointer(request_wiphy->regd, rd); 2797b7566fc3SLarry Finger rcu_free_regdom(tmp); 27983e0c3ff3SLuis R. Rodriguez 2799b8295acdSLuis R. Rodriguez rd = NULL; 2800b8295acdSLuis R. Rodriguez 2801379b82f4SJohannes Berg reset_regdomains(false, intersected_rd); 2802b8295acdSLuis R. Rodriguez 2803b8295acdSLuis R. Rodriguez return 0; 28049c96477dSLuis R. Rodriguez } 28059c96477dSLuis R. Rodriguez 280601992406SLuis R. Rodriguez static int reg_set_rd_country_ie(const struct ieee80211_regdomain *rd, 280701992406SLuis R. Rodriguez struct regulatory_request *country_ie_request) 2808f5fe3247SLuis R. Rodriguez { 2809f5fe3247SLuis R. Rodriguez struct wiphy *request_wiphy; 2810f5fe3247SLuis R. Rodriguez 2811f5fe3247SLuis R. Rodriguez if (!is_alpha2_set(rd->alpha2) && !is_an_alpha2(rd->alpha2) && 2812f5fe3247SLuis R. Rodriguez !is_unknown_alpha2(rd->alpha2)) 2813f5fe3247SLuis R. Rodriguez return -EINVAL; 2814f5fe3247SLuis R. Rodriguez 2815f5fe3247SLuis R. Rodriguez /* 2816f5fe3247SLuis R. Rodriguez * Lets only bother proceeding on the same alpha2 if the current 2817f5fe3247SLuis R. Rodriguez * rd is non static (it means CRDA was present and was used last) 2818f5fe3247SLuis R. Rodriguez * and the pending request came in from a country IE 2819f5fe3247SLuis R. Rodriguez */ 2820f5fe3247SLuis R. Rodriguez 2821f5fe3247SLuis R. Rodriguez if (!is_valid_rd(rd)) { 2822f5fe3247SLuis R. Rodriguez pr_err("Invalid regulatory domain detected:\n"); 2823f5fe3247SLuis R. Rodriguez print_regdomain_info(rd); 28243f2355cbSLuis R. Rodriguez return -EINVAL; 2825b2e1b302SLuis R. Rodriguez } 2826b2e1b302SLuis R. Rodriguez 282701992406SLuis R. Rodriguez request_wiphy = wiphy_idx_to_wiphy(country_ie_request->wiphy_idx); 2828f5fe3247SLuis R. Rodriguez if (!request_wiphy) { 2829845f3351SShaibal Dutta queue_delayed_work(system_power_efficient_wq, 2830845f3351SShaibal Dutta ®_timeout, 0); 2831f5fe3247SLuis R. Rodriguez return -ENODEV; 2832f5fe3247SLuis R. Rodriguez } 2833f5fe3247SLuis R. Rodriguez 283401992406SLuis R. Rodriguez if (country_ie_request->intersect) 2835f5fe3247SLuis R. Rodriguez return -EINVAL; 2836f5fe3247SLuis R. Rodriguez 2837f5fe3247SLuis R. Rodriguez reset_regdomains(false, rd); 2838f5fe3247SLuis R. Rodriguez return 0; 2839f5fe3247SLuis R. Rodriguez } 2840b2e1b302SLuis R. Rodriguez 2841fb1fc7adSLuis R. Rodriguez /* 2842fb1fc7adSLuis R. Rodriguez * Use this call to set the current regulatory domain. Conflicts with 2843b2e1b302SLuis R. Rodriguez * multiple drivers can be ironed out later. Caller must've already 2844458f4f9eSJohannes Berg * kmalloc'd the rd structure. 2845fb1fc7adSLuis R. Rodriguez */ 2846a3d2eaf0SJohannes Berg int set_regdom(const struct ieee80211_regdomain *rd) 2847b2e1b302SLuis R. Rodriguez { 2848c492db37SJohannes Berg struct regulatory_request *lr; 2849092008abSJanusz Dziedzic bool user_reset = false; 2850b2e1b302SLuis R. Rodriguez int r; 2851b2e1b302SLuis R. Rodriguez 28523b9e5acaSLuis R. Rodriguez if (!reg_is_valid_request(rd->alpha2)) { 28533b9e5acaSLuis R. Rodriguez kfree(rd); 28543b9e5acaSLuis R. Rodriguez return -EINVAL; 28553b9e5acaSLuis R. Rodriguez } 28563b9e5acaSLuis R. Rodriguez 2857c492db37SJohannes Berg lr = get_last_request(); 2858abc7381bSLuis R. Rodriguez 2859b2e1b302SLuis R. Rodriguez /* Note that this doesn't update the wiphys, this is done below */ 28603b9e5acaSLuis R. Rodriguez switch (lr->initiator) { 28613b9e5acaSLuis R. Rodriguez case NL80211_REGDOM_SET_BY_CORE: 28623b9e5acaSLuis R. Rodriguez r = reg_set_rd_core(rd); 28633b9e5acaSLuis R. Rodriguez break; 28643b9e5acaSLuis R. Rodriguez case NL80211_REGDOM_SET_BY_USER: 286584721d44SLuis R. Rodriguez r = reg_set_rd_user(rd, lr); 2866092008abSJanusz Dziedzic user_reset = true; 286784721d44SLuis R. Rodriguez break; 28683b9e5acaSLuis R. Rodriguez case NL80211_REGDOM_SET_BY_DRIVER: 2869f5fe3247SLuis R. Rodriguez r = reg_set_rd_driver(rd, lr); 2870f5fe3247SLuis R. Rodriguez break; 28713b9e5acaSLuis R. Rodriguez case NL80211_REGDOM_SET_BY_COUNTRY_IE: 287201992406SLuis R. Rodriguez r = reg_set_rd_country_ie(rd, lr); 28733b9e5acaSLuis R. Rodriguez break; 28743b9e5acaSLuis R. Rodriguez default: 28753b9e5acaSLuis R. Rodriguez WARN(1, "invalid initiator %d\n", lr->initiator); 28763b9e5acaSLuis R. Rodriguez return -EINVAL; 28773b9e5acaSLuis R. Rodriguez } 28783b9e5acaSLuis R. Rodriguez 2879d2372b31SJohannes Berg if (r) { 2880092008abSJanusz Dziedzic switch (r) { 2881092008abSJanusz Dziedzic case -EALREADY: 288295908535SKalle Valo reg_set_request_processed(); 2883092008abSJanusz Dziedzic break; 2884092008abSJanusz Dziedzic default: 2885092008abSJanusz Dziedzic /* Back to world regulatory in case of errors */ 2886092008abSJanusz Dziedzic restore_regulatory_settings(user_reset); 2887092008abSJanusz Dziedzic } 288895908535SKalle Valo 2889d2372b31SJohannes Berg kfree(rd); 289038fd2143SJohannes Berg return r; 2891d2372b31SJohannes Berg } 2892b2e1b302SLuis R. Rodriguez 2893b2e1b302SLuis R. Rodriguez /* This would make this whole thing pointless */ 289438fd2143SJohannes Berg if (WARN_ON(!lr->intersect && rd != get_cfg80211_regdom())) 289538fd2143SJohannes Berg return -EINVAL; 2896b2e1b302SLuis R. Rodriguez 2897b2e1b302SLuis R. Rodriguez /* update all wiphys now with the new established regulatory domain */ 2898c492db37SJohannes Berg update_all_wiphy_regulatory(lr->initiator); 2899b2e1b302SLuis R. Rodriguez 2900458f4f9eSJohannes Berg print_regdomain(get_cfg80211_regdom()); 2901b2e1b302SLuis R. Rodriguez 2902c492db37SJohannes Berg nl80211_send_reg_change_event(lr); 290373d54c9eSLuis R. Rodriguez 2904b2e253cfSLuis R. Rodriguez reg_set_request_processed(); 2905b2e253cfSLuis R. Rodriguez 290638fd2143SJohannes Berg return 0; 2907b2e1b302SLuis R. Rodriguez } 2908b2e1b302SLuis R. Rodriguez 29092c3e861cSArik Nemtsov static int __regulatory_set_wiphy_regd(struct wiphy *wiphy, 2910b0d7aa59SJonathan Doron struct ieee80211_regdomain *rd) 2911b0d7aa59SJonathan Doron { 2912b0d7aa59SJonathan Doron const struct ieee80211_regdomain *regd; 2913b0d7aa59SJonathan Doron const struct ieee80211_regdomain *prev_regd; 2914b0d7aa59SJonathan Doron struct cfg80211_registered_device *rdev; 2915b0d7aa59SJonathan Doron 2916b0d7aa59SJonathan Doron if (WARN_ON(!wiphy || !rd)) 2917b0d7aa59SJonathan Doron return -EINVAL; 2918b0d7aa59SJonathan Doron 2919b0d7aa59SJonathan Doron if (WARN(!(wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED), 2920b0d7aa59SJonathan Doron "wiphy should have REGULATORY_WIPHY_SELF_MANAGED\n")) 2921b0d7aa59SJonathan Doron return -EPERM; 2922b0d7aa59SJonathan Doron 2923b0d7aa59SJonathan Doron if (WARN(!is_valid_rd(rd), "Invalid regulatory domain detected\n")) { 2924b0d7aa59SJonathan Doron print_regdomain_info(rd); 2925b0d7aa59SJonathan Doron return -EINVAL; 2926b0d7aa59SJonathan Doron } 2927b0d7aa59SJonathan Doron 2928b0d7aa59SJonathan Doron regd = reg_copy_regd(rd); 2929b0d7aa59SJonathan Doron if (IS_ERR(regd)) 2930b0d7aa59SJonathan Doron return PTR_ERR(regd); 2931b0d7aa59SJonathan Doron 2932b0d7aa59SJonathan Doron rdev = wiphy_to_rdev(wiphy); 2933b0d7aa59SJonathan Doron 2934b0d7aa59SJonathan Doron spin_lock(®_requests_lock); 2935b0d7aa59SJonathan Doron prev_regd = rdev->requested_regd; 2936b0d7aa59SJonathan Doron rdev->requested_regd = regd; 2937b0d7aa59SJonathan Doron spin_unlock(®_requests_lock); 2938b0d7aa59SJonathan Doron 2939b0d7aa59SJonathan Doron kfree(prev_regd); 29402c3e861cSArik Nemtsov return 0; 29412c3e861cSArik Nemtsov } 29422c3e861cSArik Nemtsov 29432c3e861cSArik Nemtsov int regulatory_set_wiphy_regd(struct wiphy *wiphy, 29442c3e861cSArik Nemtsov struct ieee80211_regdomain *rd) 29452c3e861cSArik Nemtsov { 29462c3e861cSArik Nemtsov int ret = __regulatory_set_wiphy_regd(wiphy, rd); 29472c3e861cSArik Nemtsov 29482c3e861cSArik Nemtsov if (ret) 29492c3e861cSArik Nemtsov return ret; 2950b0d7aa59SJonathan Doron 2951b0d7aa59SJonathan Doron schedule_work(®_work); 2952b0d7aa59SJonathan Doron return 0; 2953b0d7aa59SJonathan Doron } 2954b0d7aa59SJonathan Doron EXPORT_SYMBOL(regulatory_set_wiphy_regd); 2955b0d7aa59SJonathan Doron 29562c3e861cSArik Nemtsov int regulatory_set_wiphy_regd_sync_rtnl(struct wiphy *wiphy, 29572c3e861cSArik Nemtsov struct ieee80211_regdomain *rd) 29582c3e861cSArik Nemtsov { 29592c3e861cSArik Nemtsov int ret; 29602c3e861cSArik Nemtsov 29612c3e861cSArik Nemtsov ASSERT_RTNL(); 29622c3e861cSArik Nemtsov 29632c3e861cSArik Nemtsov ret = __regulatory_set_wiphy_regd(wiphy, rd); 29642c3e861cSArik Nemtsov if (ret) 29652c3e861cSArik Nemtsov return ret; 29662c3e861cSArik Nemtsov 29672c3e861cSArik Nemtsov /* process the request immediately */ 29682c3e861cSArik Nemtsov reg_process_self_managed_hints(); 29692c3e861cSArik Nemtsov return 0; 29702c3e861cSArik Nemtsov } 29712c3e861cSArik Nemtsov EXPORT_SYMBOL(regulatory_set_wiphy_regd_sync_rtnl); 29722c3e861cSArik Nemtsov 297357b5ce07SLuis R. Rodriguez void wiphy_regulatory_register(struct wiphy *wiphy) 297457b5ce07SLuis R. Rodriguez { 297523df0b73SArik Nemtsov struct regulatory_request *lr; 297623df0b73SArik Nemtsov 2977b0d7aa59SJonathan Doron /* self-managed devices ignore external hints */ 2978b0d7aa59SJonathan Doron if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) 2979b0d7aa59SJonathan Doron wiphy->regulatory_flags |= REGULATORY_DISABLE_BEACON_HINTS | 2980b0d7aa59SJonathan Doron REGULATORY_COUNTRY_IE_IGNORE; 2981b0d7aa59SJonathan Doron 298257b5ce07SLuis R. Rodriguez if (!reg_dev_ignore_cell_hint(wiphy)) 298357b5ce07SLuis R. Rodriguez reg_num_devs_support_basehint++; 298457b5ce07SLuis R. Rodriguez 298523df0b73SArik Nemtsov lr = get_last_request(); 298623df0b73SArik Nemtsov wiphy_update_regulatory(wiphy, lr->initiator); 298757b5ce07SLuis R. Rodriguez } 298857b5ce07SLuis R. Rodriguez 2989bfead080SLuis R. Rodriguez void wiphy_regulatory_deregister(struct wiphy *wiphy) 29903f2355cbSLuis R. Rodriguez { 29910ad8acafSLuis R. Rodriguez struct wiphy *request_wiphy = NULL; 2992c492db37SJohannes Berg struct regulatory_request *lr; 2993761cf7ecSLuis R. Rodriguez 2994c492db37SJohannes Berg lr = get_last_request(); 2995abc7381bSLuis R. Rodriguez 299657b5ce07SLuis R. Rodriguez if (!reg_dev_ignore_cell_hint(wiphy)) 299757b5ce07SLuis R. Rodriguez reg_num_devs_support_basehint--; 299857b5ce07SLuis R. Rodriguez 2999458f4f9eSJohannes Berg rcu_free_regdom(get_wiphy_regdom(wiphy)); 300034dd886cSMonam Agarwal RCU_INIT_POINTER(wiphy->regd, NULL); 30010ef9ccddSChris Wright 3002c492db37SJohannes Berg if (lr) 3003c492db37SJohannes Berg request_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx); 3004806a9e39SLuis R. Rodriguez 30050ef9ccddSChris Wright if (!request_wiphy || request_wiphy != wiphy) 300638fd2143SJohannes Berg return; 30070ef9ccddSChris Wright 3008c492db37SJohannes Berg lr->wiphy_idx = WIPHY_IDX_INVALID; 3009c492db37SJohannes Berg lr->country_ie_env = ENVIRON_ANY; 30103f2355cbSLuis R. Rodriguez } 30113f2355cbSLuis R. Rodriguez 3012a90c7a31SLuis R. Rodriguez static void reg_timeout_work(struct work_struct *work) 3013a90c7a31SLuis R. Rodriguez { 30141a919318SJohannes Berg REG_DBG_PRINT("Timeout while waiting for CRDA to reply, restoring regulatory settings\n"); 3015f77b86d7SJohannes Berg rtnl_lock(); 3016a90c7a31SLuis R. Rodriguez restore_regulatory_settings(true); 3017f77b86d7SJohannes Berg rtnl_unlock(); 3018a90c7a31SLuis R. Rodriguez } 3019a90c7a31SLuis R. Rodriguez 3020174e0cd2SIlan Peer /* 3021174e0cd2SIlan Peer * See http://www.fcc.gov/document/5-ghz-unlicensed-spectrum-unii, for 3022174e0cd2SIlan Peer * UNII band definitions 3023174e0cd2SIlan Peer */ 3024174e0cd2SIlan Peer int cfg80211_get_unii(int freq) 3025174e0cd2SIlan Peer { 3026174e0cd2SIlan Peer /* UNII-1 */ 3027174e0cd2SIlan Peer if (freq >= 5150 && freq <= 5250) 3028174e0cd2SIlan Peer return 0; 3029174e0cd2SIlan Peer 3030174e0cd2SIlan Peer /* UNII-2A */ 3031174e0cd2SIlan Peer if (freq > 5250 && freq <= 5350) 3032174e0cd2SIlan Peer return 1; 3033174e0cd2SIlan Peer 3034174e0cd2SIlan Peer /* UNII-2B */ 3035174e0cd2SIlan Peer if (freq > 5350 && freq <= 5470) 3036174e0cd2SIlan Peer return 2; 3037174e0cd2SIlan Peer 3038174e0cd2SIlan Peer /* UNII-2C */ 3039174e0cd2SIlan Peer if (freq > 5470 && freq <= 5725) 3040174e0cd2SIlan Peer return 3; 3041174e0cd2SIlan Peer 3042174e0cd2SIlan Peer /* UNII-3 */ 3043174e0cd2SIlan Peer if (freq > 5725 && freq <= 5825) 3044174e0cd2SIlan Peer return 4; 3045174e0cd2SIlan Peer 3046174e0cd2SIlan Peer return -EINVAL; 3047174e0cd2SIlan Peer } 3048174e0cd2SIlan Peer 3049c8866e55SIlan Peer bool regulatory_indoor_allowed(void) 3050c8866e55SIlan Peer { 3051c8866e55SIlan Peer return reg_is_indoor; 3052c8866e55SIlan Peer } 3053c8866e55SIlan Peer 30542fcc9f73SUwe Kleine-König int __init regulatory_init(void) 3055b2e1b302SLuis R. Rodriguez { 3056bcf4f99bSLuis R. Rodriguez int err = 0; 3057734366deSJohannes Berg 3058b2e1b302SLuis R. Rodriguez reg_pdev = platform_device_register_simple("regulatory", 0, NULL, 0); 3059b2e1b302SLuis R. Rodriguez if (IS_ERR(reg_pdev)) 3060b2e1b302SLuis R. Rodriguez return PTR_ERR(reg_pdev); 3061734366deSJohannes Berg 3062fe33eb39SLuis R. Rodriguez spin_lock_init(®_requests_lock); 3063e38f8a7aSLuis R. Rodriguez spin_lock_init(®_pending_beacons_lock); 3064fe33eb39SLuis R. Rodriguez 306580007efeSLuis R. Rodriguez reg_regdb_size_check(); 306680007efeSLuis R. Rodriguez 3067458f4f9eSJohannes Berg rcu_assign_pointer(cfg80211_regdomain, cfg80211_world_regdom); 3068734366deSJohannes Berg 306909d989d1SLuis R. Rodriguez user_alpha2[0] = '9'; 307009d989d1SLuis R. Rodriguez user_alpha2[1] = '7'; 307109d989d1SLuis R. Rodriguez 3072ae9e4b0dSLuis R. Rodriguez /* We always try to get an update for the static regdomain */ 3073458f4f9eSJohannes Berg err = regulatory_hint_core(cfg80211_world_regdom->alpha2); 3074bcf4f99bSLuis R. Rodriguez if (err) { 3075bcf4f99bSLuis R. Rodriguez if (err == -ENOMEM) 3076bcf4f99bSLuis R. Rodriguez return err; 3077bcf4f99bSLuis R. Rodriguez /* 3078bcf4f99bSLuis R. Rodriguez * N.B. kobject_uevent_env() can fail mainly for when we're out 3079bcf4f99bSLuis R. Rodriguez * memory which is handled and propagated appropriately above 3080bcf4f99bSLuis R. Rodriguez * but it can also fail during a netlink_broadcast() or during 3081bcf4f99bSLuis R. Rodriguez * early boot for call_usermodehelper(). For now treat these 3082bcf4f99bSLuis R. Rodriguez * errors as non-fatal. 3083bcf4f99bSLuis R. Rodriguez */ 3084e9c0268fSJoe Perches pr_err("kobject_uevent_env() was unable to call CRDA during init\n"); 3085bcf4f99bSLuis R. Rodriguez } 3086734366deSJohannes Berg 3087ae9e4b0dSLuis R. Rodriguez /* 3088ae9e4b0dSLuis R. Rodriguez * Finally, if the user set the module parameter treat it 3089ae9e4b0dSLuis R. Rodriguez * as a user hint. 3090ae9e4b0dSLuis R. Rodriguez */ 3091ae9e4b0dSLuis R. Rodriguez if (!is_world_regdom(ieee80211_regdom)) 309257b5ce07SLuis R. Rodriguez regulatory_hint_user(ieee80211_regdom, 309357b5ce07SLuis R. Rodriguez NL80211_USER_REG_HINT_USER); 3094ae9e4b0dSLuis R. Rodriguez 3095b2e1b302SLuis R. Rodriguez return 0; 3096b2e1b302SLuis R. Rodriguez } 3097b2e1b302SLuis R. Rodriguez 30981a919318SJohannes Berg void regulatory_exit(void) 3099b2e1b302SLuis R. Rodriguez { 3100fe33eb39SLuis R. Rodriguez struct regulatory_request *reg_request, *tmp; 3101e38f8a7aSLuis R. Rodriguez struct reg_beacon *reg_beacon, *btmp; 3102fe33eb39SLuis R. Rodriguez 3103fe33eb39SLuis R. Rodriguez cancel_work_sync(®_work); 3104a90c7a31SLuis R. Rodriguez cancel_delayed_work_sync(®_timeout); 3105ad932f04SArik Nemtsov cancel_delayed_work_sync(®_check_chans); 3106fe33eb39SLuis R. Rodriguez 31079027b149SJohannes Berg /* Lock to suppress warnings */ 310838fd2143SJohannes Berg rtnl_lock(); 3109379b82f4SJohannes Berg reset_regdomains(true, NULL); 311038fd2143SJohannes Berg rtnl_unlock(); 3111734366deSJohannes Berg 311258ebacc6SLuis R. Rodriguez dev_set_uevent_suppress(®_pdev->dev, true); 3113f6037d09SJohannes Berg 3114b2e1b302SLuis R. Rodriguez platform_device_unregister(reg_pdev); 3115734366deSJohannes Berg 3116fea9bcedSJohannes Berg list_for_each_entry_safe(reg_beacon, btmp, ®_pending_beacons, list) { 3117e38f8a7aSLuis R. Rodriguez list_del(®_beacon->list); 3118e38f8a7aSLuis R. Rodriguez kfree(reg_beacon); 3119e38f8a7aSLuis R. Rodriguez } 3120e38f8a7aSLuis R. Rodriguez 3121fea9bcedSJohannes Berg list_for_each_entry_safe(reg_beacon, btmp, ®_beacon_list, list) { 3122e38f8a7aSLuis R. Rodriguez list_del(®_beacon->list); 3123e38f8a7aSLuis R. Rodriguez kfree(reg_beacon); 3124e38f8a7aSLuis R. Rodriguez } 3125e38f8a7aSLuis R. Rodriguez 3126fea9bcedSJohannes Berg list_for_each_entry_safe(reg_request, tmp, ®_requests_list, list) { 3127fe33eb39SLuis R. Rodriguez list_del(®_request->list); 3128fe33eb39SLuis R. Rodriguez kfree(reg_request); 3129fe33eb39SLuis R. Rodriguez } 3130fe33eb39SLuis R. Rodriguez } 3131