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 */ 13252616f2bSIlan Peer static bool reg_is_indoor; 13305050753SIlan peer static spinlock_t reg_indoor_lock; 13405050753SIlan peer 13505050753SIlan peer /* Used to track the userspace process controlling the indoor setting */ 13605050753SIlan peer static u32 reg_is_indoor_portid; 13752616f2bSIlan Peer 138b6863036SJohannes Berg static void restore_regulatory_settings(bool reset_user); 139c37722bdSIlan peer 140458f4f9eSJohannes Berg static const struct ieee80211_regdomain *get_cfg80211_regdom(void) 141458f4f9eSJohannes Berg { 14238fd2143SJohannes Berg return rtnl_dereference(cfg80211_regdomain); 143458f4f9eSJohannes Berg } 144458f4f9eSJohannes Berg 145ad30ca2cSArik Nemtsov const struct ieee80211_regdomain *get_wiphy_regdom(struct wiphy *wiphy) 146458f4f9eSJohannes Berg { 14738fd2143SJohannes Berg return rtnl_dereference(wiphy->regd); 148458f4f9eSJohannes Berg } 149458f4f9eSJohannes Berg 1503ef121b5SLuis R. Rodriguez static const char *reg_dfs_region_str(enum nl80211_dfs_regions dfs_region) 1513ef121b5SLuis R. Rodriguez { 1523ef121b5SLuis R. Rodriguez switch (dfs_region) { 1533ef121b5SLuis R. Rodriguez case NL80211_DFS_UNSET: 1543ef121b5SLuis R. Rodriguez return "unset"; 1553ef121b5SLuis R. Rodriguez case NL80211_DFS_FCC: 1563ef121b5SLuis R. Rodriguez return "FCC"; 1573ef121b5SLuis R. Rodriguez case NL80211_DFS_ETSI: 1583ef121b5SLuis R. Rodriguez return "ETSI"; 1593ef121b5SLuis R. Rodriguez case NL80211_DFS_JP: 1603ef121b5SLuis R. Rodriguez return "JP"; 1613ef121b5SLuis R. Rodriguez } 1623ef121b5SLuis R. Rodriguez return "Unknown"; 1633ef121b5SLuis R. Rodriguez } 1643ef121b5SLuis R. Rodriguez 1656c474799SLuis R. Rodriguez enum nl80211_dfs_regions reg_get_dfs_region(struct wiphy *wiphy) 1666c474799SLuis R. Rodriguez { 1676c474799SLuis R. Rodriguez const struct ieee80211_regdomain *regd = NULL; 1686c474799SLuis R. Rodriguez const struct ieee80211_regdomain *wiphy_regd = NULL; 1696c474799SLuis R. Rodriguez 1706c474799SLuis R. Rodriguez regd = get_cfg80211_regdom(); 1716c474799SLuis R. Rodriguez if (!wiphy) 1726c474799SLuis R. Rodriguez goto out; 1736c474799SLuis R. Rodriguez 1746c474799SLuis R. Rodriguez wiphy_regd = get_wiphy_regdom(wiphy); 1756c474799SLuis R. Rodriguez if (!wiphy_regd) 1766c474799SLuis R. Rodriguez goto out; 1776c474799SLuis R. Rodriguez 1786c474799SLuis R. Rodriguez if (wiphy_regd->dfs_region == regd->dfs_region) 1796c474799SLuis R. Rodriguez goto out; 1806c474799SLuis R. Rodriguez 1816c474799SLuis R. Rodriguez REG_DBG_PRINT("%s: device specific dfs_region " 1826c474799SLuis R. Rodriguez "(%s) disagrees with cfg80211's " 1836c474799SLuis R. Rodriguez "central dfs_region (%s)\n", 1846c474799SLuis R. Rodriguez dev_name(&wiphy->dev), 1856c474799SLuis R. Rodriguez reg_dfs_region_str(wiphy_regd->dfs_region), 1866c474799SLuis R. Rodriguez reg_dfs_region_str(regd->dfs_region)); 1876c474799SLuis R. Rodriguez 1886c474799SLuis R. Rodriguez out: 1896c474799SLuis R. Rodriguez return regd->dfs_region; 1906c474799SLuis R. Rodriguez } 1916c474799SLuis R. Rodriguez 192458f4f9eSJohannes Berg static void rcu_free_regdom(const struct ieee80211_regdomain *r) 193458f4f9eSJohannes Berg { 194458f4f9eSJohannes Berg if (!r) 195458f4f9eSJohannes Berg return; 196458f4f9eSJohannes Berg kfree_rcu((struct ieee80211_regdomain *)r, rcu_head); 197458f4f9eSJohannes Berg } 198458f4f9eSJohannes Berg 199c492db37SJohannes Berg static struct regulatory_request *get_last_request(void) 200c492db37SJohannes Berg { 20138fd2143SJohannes Berg return rcu_dereference_rtnl(last_request); 202c492db37SJohannes Berg } 203c492db37SJohannes Berg 204e38f8a7aSLuis R. Rodriguez /* Used to queue up regulatory hints */ 205fe33eb39SLuis R. Rodriguez static LIST_HEAD(reg_requests_list); 206fe33eb39SLuis R. Rodriguez static spinlock_t reg_requests_lock; 207fe33eb39SLuis R. Rodriguez 208e38f8a7aSLuis R. Rodriguez /* Used to queue up beacon hints for review */ 209e38f8a7aSLuis R. Rodriguez static LIST_HEAD(reg_pending_beacons); 210e38f8a7aSLuis R. Rodriguez static spinlock_t reg_pending_beacons_lock; 211e38f8a7aSLuis R. Rodriguez 212e38f8a7aSLuis R. Rodriguez /* Used to keep track of processed beacon hints */ 213e38f8a7aSLuis R. Rodriguez static LIST_HEAD(reg_beacon_list); 214e38f8a7aSLuis R. Rodriguez 215e38f8a7aSLuis R. Rodriguez struct reg_beacon { 216e38f8a7aSLuis R. Rodriguez struct list_head list; 217e38f8a7aSLuis R. Rodriguez struct ieee80211_channel chan; 218e38f8a7aSLuis R. Rodriguez }; 219e38f8a7aSLuis R. Rodriguez 220ad932f04SArik Nemtsov static void reg_check_chans_work(struct work_struct *work); 221ad932f04SArik Nemtsov static DECLARE_DELAYED_WORK(reg_check_chans, reg_check_chans_work); 222ad932f04SArik Nemtsov 223f333a7a2SLuis R. Rodriguez static void reg_todo(struct work_struct *work); 224f333a7a2SLuis R. Rodriguez static DECLARE_WORK(reg_work, reg_todo); 225f333a7a2SLuis R. Rodriguez 226734366deSJohannes Berg /* We keep a static world regulatory domain in case of the absence of CRDA */ 227734366deSJohannes Berg static const struct ieee80211_regdomain world_regdom = { 22828981e5eSJason Abele .n_reg_rules = 8, 229734366deSJohannes Berg .alpha2 = "00", 230734366deSJohannes Berg .reg_rules = { 23168798a62SLuis R. Rodriguez /* IEEE 802.11b/g, channels 1..11 */ 23268798a62SLuis R. Rodriguez REG_RULE(2412-10, 2462+10, 40, 6, 20, 0), 23343c771a1SJohannes Berg /* IEEE 802.11b/g, channels 12..13. */ 23443c771a1SJohannes Berg REG_RULE(2467-10, 2472+10, 40, 6, 20, 2358fe02e16SLuis R. Rodriguez NL80211_RRF_NO_IR), 236611b6a82SLuis R. Rodriguez /* IEEE 802.11 channel 14 - Only JP enables 237611b6a82SLuis R. Rodriguez * this and for 802.11b only */ 238611b6a82SLuis R. Rodriguez REG_RULE(2484-10, 2484+10, 20, 6, 20, 2398fe02e16SLuis R. Rodriguez NL80211_RRF_NO_IR | 240611b6a82SLuis R. Rodriguez NL80211_RRF_NO_OFDM), 2413fc71f77SLuis R. Rodriguez /* IEEE 802.11a, channel 36..48 */ 242131a19bcSJohannes Berg REG_RULE(5180-10, 5240+10, 160, 6, 20, 2438fe02e16SLuis R. Rodriguez NL80211_RRF_NO_IR), 2443fc71f77SLuis R. Rodriguez 245131a19bcSJohannes Berg /* IEEE 802.11a, channel 52..64 - DFS required */ 246131a19bcSJohannes Berg REG_RULE(5260-10, 5320+10, 160, 6, 20, 2478fe02e16SLuis R. Rodriguez NL80211_RRF_NO_IR | 248131a19bcSJohannes Berg NL80211_RRF_DFS), 249131a19bcSJohannes Berg 250131a19bcSJohannes Berg /* IEEE 802.11a, channel 100..144 - DFS required */ 251131a19bcSJohannes Berg REG_RULE(5500-10, 5720+10, 160, 6, 20, 2528fe02e16SLuis R. Rodriguez NL80211_RRF_NO_IR | 253131a19bcSJohannes Berg NL80211_RRF_DFS), 2543fc71f77SLuis R. Rodriguez 2553fc71f77SLuis R. Rodriguez /* IEEE 802.11a, channel 149..165 */ 2568ab9d85cSJohannes Berg REG_RULE(5745-10, 5825+10, 80, 6, 20, 2578fe02e16SLuis R. Rodriguez NL80211_RRF_NO_IR), 25890cdc6dfSVladimir Kondratiev 2598047d261SJohannes Berg /* IEEE 802.11ad (60GHz), channels 1..3 */ 26090cdc6dfSVladimir Kondratiev REG_RULE(56160+2160*1-1080, 56160+2160*3+1080, 2160, 0, 0, 0), 261734366deSJohannes Berg } 262734366deSJohannes Berg }; 263734366deSJohannes Berg 26438fd2143SJohannes Berg /* protected by RTNL */ 265a3d2eaf0SJohannes Berg static const struct ieee80211_regdomain *cfg80211_world_regdom = 266a3d2eaf0SJohannes Berg &world_regdom; 267734366deSJohannes Berg 2686ee7d330SLuis R. Rodriguez static char *ieee80211_regdom = "00"; 26909d989d1SLuis R. Rodriguez static char user_alpha2[2]; 2706ee7d330SLuis R. Rodriguez 271734366deSJohannes Berg module_param(ieee80211_regdom, charp, 0444); 272734366deSJohannes Berg MODULE_PARM_DESC(ieee80211_regdom, "IEEE 802.11 regulatory domain code"); 273734366deSJohannes Berg 274c888393bSArik Nemtsov static void reg_free_request(struct regulatory_request *request) 2755ad6ef5eSLuis R. Rodriguez { 276d34265a3SJohannes Berg if (request == &core_request_world) 277d34265a3SJohannes Berg return; 278d34265a3SJohannes Berg 279c888393bSArik Nemtsov if (request != get_last_request()) 280c888393bSArik Nemtsov kfree(request); 281c888393bSArik Nemtsov } 282c888393bSArik Nemtsov 283c888393bSArik Nemtsov static void reg_free_last_request(void) 284c888393bSArik Nemtsov { 285c888393bSArik Nemtsov struct regulatory_request *lr = get_last_request(); 286c888393bSArik Nemtsov 2875ad6ef5eSLuis R. Rodriguez if (lr != &core_request_world && lr) 2885ad6ef5eSLuis R. Rodriguez kfree_rcu(lr, rcu_head); 2895ad6ef5eSLuis R. Rodriguez } 2905ad6ef5eSLuis R. Rodriguez 29105f1a3eaSLuis R. Rodriguez static void reg_update_last_request(struct regulatory_request *request) 29205f1a3eaSLuis R. Rodriguez { 293255e25b0SLuis R. Rodriguez struct regulatory_request *lr; 294255e25b0SLuis R. Rodriguez 295255e25b0SLuis R. Rodriguez lr = get_last_request(); 296255e25b0SLuis R. Rodriguez if (lr == request) 297255e25b0SLuis R. Rodriguez return; 298255e25b0SLuis R. Rodriguez 299c888393bSArik Nemtsov reg_free_last_request(); 30005f1a3eaSLuis R. Rodriguez rcu_assign_pointer(last_request, request); 30105f1a3eaSLuis R. Rodriguez } 30205f1a3eaSLuis R. Rodriguez 303379b82f4SJohannes Berg static void reset_regdomains(bool full_reset, 304379b82f4SJohannes Berg const struct ieee80211_regdomain *new_regdom) 305734366deSJohannes Berg { 306458f4f9eSJohannes Berg const struct ieee80211_regdomain *r; 307458f4f9eSJohannes Berg 30838fd2143SJohannes Berg ASSERT_RTNL(); 309e8da2bb4SJohannes Berg 310458f4f9eSJohannes Berg r = get_cfg80211_regdom(); 311458f4f9eSJohannes Berg 312942b25cfSJohannes Berg /* avoid freeing static information or freeing something twice */ 313458f4f9eSJohannes Berg if (r == cfg80211_world_regdom) 314458f4f9eSJohannes Berg r = NULL; 315942b25cfSJohannes Berg if (cfg80211_world_regdom == &world_regdom) 316942b25cfSJohannes Berg cfg80211_world_regdom = NULL; 317458f4f9eSJohannes Berg if (r == &world_regdom) 318458f4f9eSJohannes Berg r = NULL; 319942b25cfSJohannes Berg 320458f4f9eSJohannes Berg rcu_free_regdom(r); 321458f4f9eSJohannes Berg rcu_free_regdom(cfg80211_world_regdom); 322734366deSJohannes Berg 323a3d2eaf0SJohannes Berg cfg80211_world_regdom = &world_regdom; 324458f4f9eSJohannes Berg rcu_assign_pointer(cfg80211_regdomain, new_regdom); 325a042994dSLuis R. Rodriguez 326a042994dSLuis R. Rodriguez if (!full_reset) 327a042994dSLuis R. Rodriguez return; 328a042994dSLuis R. Rodriguez 32905f1a3eaSLuis R. Rodriguez reg_update_last_request(&core_request_world); 330734366deSJohannes Berg } 331734366deSJohannes Berg 332fb1fc7adSLuis R. Rodriguez /* 333fb1fc7adSLuis R. Rodriguez * Dynamic world regulatory domain requested by the wireless 334fb1fc7adSLuis R. Rodriguez * core upon initialization 335fb1fc7adSLuis R. Rodriguez */ 336a3d2eaf0SJohannes Berg static void update_world_regdomain(const struct ieee80211_regdomain *rd) 337734366deSJohannes Berg { 338c492db37SJohannes Berg struct regulatory_request *lr; 339734366deSJohannes Berg 340c492db37SJohannes Berg lr = get_last_request(); 341c492db37SJohannes Berg 342c492db37SJohannes Berg WARN_ON(!lr); 343e8da2bb4SJohannes Berg 344379b82f4SJohannes Berg reset_regdomains(false, rd); 345734366deSJohannes Berg 346734366deSJohannes Berg cfg80211_world_regdom = rd; 347734366deSJohannes Berg } 348734366deSJohannes Berg 349a3d2eaf0SJohannes Berg bool is_world_regdom(const char *alpha2) 350b2e1b302SLuis R. Rodriguez { 351b2e1b302SLuis R. Rodriguez if (!alpha2) 352b2e1b302SLuis R. Rodriguez return false; 3531a919318SJohannes Berg return alpha2[0] == '0' && alpha2[1] == '0'; 354b2e1b302SLuis R. Rodriguez } 355b2e1b302SLuis R. Rodriguez 356a3d2eaf0SJohannes Berg static bool is_alpha2_set(const char *alpha2) 357b2e1b302SLuis R. Rodriguez { 358b2e1b302SLuis R. Rodriguez if (!alpha2) 359b2e1b302SLuis R. Rodriguez return false; 3601a919318SJohannes Berg return alpha2[0] && alpha2[1]; 361b2e1b302SLuis R. Rodriguez } 362b2e1b302SLuis R. Rodriguez 363a3d2eaf0SJohannes Berg static bool is_unknown_alpha2(const char *alpha2) 364b2e1b302SLuis R. Rodriguez { 365b2e1b302SLuis R. Rodriguez if (!alpha2) 366b2e1b302SLuis R. Rodriguez return false; 367fb1fc7adSLuis R. Rodriguez /* 368fb1fc7adSLuis R. Rodriguez * Special case where regulatory domain was built by driver 369fb1fc7adSLuis R. Rodriguez * but a specific alpha2 cannot be determined 370fb1fc7adSLuis R. Rodriguez */ 3711a919318SJohannes Berg return alpha2[0] == '9' && alpha2[1] == '9'; 372b2e1b302SLuis R. Rodriguez } 373b2e1b302SLuis R. Rodriguez 3743f2355cbSLuis R. Rodriguez static bool is_intersected_alpha2(const char *alpha2) 3753f2355cbSLuis R. Rodriguez { 3763f2355cbSLuis R. Rodriguez if (!alpha2) 3773f2355cbSLuis R. Rodriguez return false; 378fb1fc7adSLuis R. Rodriguez /* 379fb1fc7adSLuis R. Rodriguez * Special case where regulatory domain is the 3803f2355cbSLuis R. Rodriguez * result of an intersection between two regulatory domain 381fb1fc7adSLuis R. Rodriguez * structures 382fb1fc7adSLuis R. Rodriguez */ 3831a919318SJohannes Berg return alpha2[0] == '9' && alpha2[1] == '8'; 3843f2355cbSLuis R. Rodriguez } 3853f2355cbSLuis R. Rodriguez 386a3d2eaf0SJohannes Berg static bool is_an_alpha2(const char *alpha2) 387b2e1b302SLuis R. Rodriguez { 388b2e1b302SLuis R. Rodriguez if (!alpha2) 389b2e1b302SLuis R. Rodriguez return false; 3901a919318SJohannes Berg return isalpha(alpha2[0]) && isalpha(alpha2[1]); 391b2e1b302SLuis R. Rodriguez } 392b2e1b302SLuis R. Rodriguez 393a3d2eaf0SJohannes Berg static bool alpha2_equal(const char *alpha2_x, const char *alpha2_y) 394b2e1b302SLuis R. Rodriguez { 395b2e1b302SLuis R. Rodriguez if (!alpha2_x || !alpha2_y) 396b2e1b302SLuis R. Rodriguez return false; 3971a919318SJohannes Berg return alpha2_x[0] == alpha2_y[0] && alpha2_x[1] == alpha2_y[1]; 398b2e1b302SLuis R. Rodriguez } 399b2e1b302SLuis R. Rodriguez 40069b1572bSLuis R. Rodriguez static bool regdom_changes(const char *alpha2) 401b2e1b302SLuis R. Rodriguez { 402458f4f9eSJohannes Berg const struct ieee80211_regdomain *r = get_cfg80211_regdom(); 403761cf7ecSLuis R. Rodriguez 404458f4f9eSJohannes Berg if (!r) 405b2e1b302SLuis R. Rodriguez return true; 406458f4f9eSJohannes Berg return !alpha2_equal(r->alpha2, alpha2); 407b2e1b302SLuis R. Rodriguez } 408b2e1b302SLuis R. Rodriguez 40909d989d1SLuis R. Rodriguez /* 41009d989d1SLuis R. Rodriguez * The NL80211_REGDOM_SET_BY_USER regdom alpha2 is cached, this lets 41109d989d1SLuis R. Rodriguez * you know if a valid regulatory hint with NL80211_REGDOM_SET_BY_USER 41209d989d1SLuis R. Rodriguez * has ever been issued. 41309d989d1SLuis R. Rodriguez */ 41409d989d1SLuis R. Rodriguez static bool is_user_regdom_saved(void) 41509d989d1SLuis R. Rodriguez { 41609d989d1SLuis R. Rodriguez if (user_alpha2[0] == '9' && user_alpha2[1] == '7') 41709d989d1SLuis R. Rodriguez return false; 41809d989d1SLuis R. Rodriguez 41909d989d1SLuis R. Rodriguez /* This would indicate a mistake on the design */ 4201a919318SJohannes Berg if (WARN(!is_world_regdom(user_alpha2) && !is_an_alpha2(user_alpha2), 42109d989d1SLuis R. Rodriguez "Unexpected user alpha2: %c%c\n", 4221a919318SJohannes Berg user_alpha2[0], user_alpha2[1])) 42309d989d1SLuis R. Rodriguez return false; 42409d989d1SLuis R. Rodriguez 42509d989d1SLuis R. Rodriguez return true; 42609d989d1SLuis R. Rodriguez } 42709d989d1SLuis R. Rodriguez 428e9763c3cSJohannes Berg static const struct ieee80211_regdomain * 429e9763c3cSJohannes Berg reg_copy_regd(const struct ieee80211_regdomain *src_regd) 4303b377ea9SJohn W. Linville { 4313b377ea9SJohn W. Linville struct ieee80211_regdomain *regd; 432e9763c3cSJohannes Berg int size_of_regd; 4333b377ea9SJohn W. Linville unsigned int i; 4343b377ea9SJohn W. Linville 43582f20856SJohannes Berg size_of_regd = 43682f20856SJohannes Berg sizeof(struct ieee80211_regdomain) + 43782f20856SJohannes Berg src_regd->n_reg_rules * sizeof(struct ieee80211_reg_rule); 4383b377ea9SJohn W. Linville 4393b377ea9SJohn W. Linville regd = kzalloc(size_of_regd, GFP_KERNEL); 4403b377ea9SJohn W. Linville if (!regd) 441e9763c3cSJohannes Berg return ERR_PTR(-ENOMEM); 4423b377ea9SJohn W. Linville 4433b377ea9SJohn W. Linville memcpy(regd, src_regd, sizeof(struct ieee80211_regdomain)); 4443b377ea9SJohn W. Linville 4453b377ea9SJohn W. Linville for (i = 0; i < src_regd->n_reg_rules; i++) 4463b377ea9SJohn W. Linville memcpy(®d->reg_rules[i], &src_regd->reg_rules[i], 4473b377ea9SJohn W. Linville sizeof(struct ieee80211_reg_rule)); 4483b377ea9SJohn W. Linville 449e9763c3cSJohannes Berg return regd; 4503b377ea9SJohn W. Linville } 4513b377ea9SJohn W. Linville 4523b377ea9SJohn W. Linville #ifdef CONFIG_CFG80211_INTERNAL_REGDB 453c7d319e5SJohannes Berg struct reg_regdb_apply_request { 4543b377ea9SJohn W. Linville struct list_head list; 455c7d319e5SJohannes Berg const struct ieee80211_regdomain *regdom; 4563b377ea9SJohn W. Linville }; 4573b377ea9SJohn W. Linville 458c7d319e5SJohannes Berg static LIST_HEAD(reg_regdb_apply_list); 459c7d319e5SJohannes Berg static DEFINE_MUTEX(reg_regdb_apply_mutex); 4603b377ea9SJohn W. Linville 461c7d319e5SJohannes Berg static void reg_regdb_apply(struct work_struct *work) 4623b377ea9SJohn W. Linville { 463c7d319e5SJohannes Berg struct reg_regdb_apply_request *request; 464a85d0d7fSLuis R. Rodriguez 4655fe231e8SJohannes Berg rtnl_lock(); 4663b377ea9SJohn W. Linville 467c7d319e5SJohannes Berg mutex_lock(®_regdb_apply_mutex); 468c7d319e5SJohannes Berg while (!list_empty(®_regdb_apply_list)) { 469c7d319e5SJohannes Berg request = list_first_entry(®_regdb_apply_list, 470c7d319e5SJohannes Berg struct reg_regdb_apply_request, 4713b377ea9SJohn W. Linville list); 4723b377ea9SJohn W. Linville list_del(&request->list); 4733b377ea9SJohn W. Linville 474c7d319e5SJohannes Berg set_regdom(request->regdom, REGD_SOURCE_INTERNAL_DB); 4753b377ea9SJohn W. Linville kfree(request); 4763b377ea9SJohn W. Linville } 477c7d319e5SJohannes Berg mutex_unlock(®_regdb_apply_mutex); 478a85d0d7fSLuis R. Rodriguez 4795fe231e8SJohannes Berg rtnl_unlock(); 4803b377ea9SJohn W. Linville } 4813b377ea9SJohn W. Linville 482c7d319e5SJohannes Berg static DECLARE_WORK(reg_regdb_work, reg_regdb_apply); 4833b377ea9SJohn W. Linville 484fd453d3cSJohannes Berg static int reg_query_builtin(const char *alpha2) 4853b377ea9SJohn W. Linville { 486c7d319e5SJohannes Berg const struct ieee80211_regdomain *regdom = NULL; 487c7d319e5SJohannes Berg struct reg_regdb_apply_request *request; 488c7d319e5SJohannes Berg unsigned int i; 4893b377ea9SJohn W. Linville 490c7d319e5SJohannes Berg for (i = 0; i < reg_regdb_size; i++) { 491c7d319e5SJohannes Berg if (alpha2_equal(alpha2, reg_regdb[i]->alpha2)) { 492c7d319e5SJohannes Berg regdom = reg_regdb[i]; 493c7d319e5SJohannes Berg break; 494c7d319e5SJohannes Berg } 495c7d319e5SJohannes Berg } 496c7d319e5SJohannes Berg 497c7d319e5SJohannes Berg if (!regdom) 498c7d319e5SJohannes Berg return -ENODATA; 499c7d319e5SJohannes Berg 500c7d319e5SJohannes Berg request = kzalloc(sizeof(struct reg_regdb_apply_request), GFP_KERNEL); 5013b377ea9SJohn W. Linville if (!request) 502c7d319e5SJohannes Berg return -ENOMEM; 5033b377ea9SJohn W. Linville 504c7d319e5SJohannes Berg request->regdom = reg_copy_regd(regdom); 505c7d319e5SJohannes Berg if (IS_ERR_OR_NULL(request->regdom)) { 506c7d319e5SJohannes Berg kfree(request); 507c7d319e5SJohannes Berg return -ENOMEM; 508c7d319e5SJohannes Berg } 5093b377ea9SJohn W. Linville 510c7d319e5SJohannes Berg mutex_lock(®_regdb_apply_mutex); 511c7d319e5SJohannes Berg list_add_tail(&request->list, ®_regdb_apply_list); 512c7d319e5SJohannes Berg mutex_unlock(®_regdb_apply_mutex); 5133b377ea9SJohn W. Linville 5143b377ea9SJohn W. Linville schedule_work(®_regdb_work); 515c7d319e5SJohannes Berg 516c7d319e5SJohannes Berg return 0; 5173b377ea9SJohn W. Linville } 51880007efeSLuis R. Rodriguez 51980007efeSLuis R. Rodriguez /* Feel free to add any other sanity checks here */ 52080007efeSLuis R. Rodriguez static void reg_regdb_size_check(void) 52180007efeSLuis R. Rodriguez { 52280007efeSLuis R. Rodriguez /* We should ideally BUILD_BUG_ON() but then random builds would fail */ 52380007efeSLuis R. Rodriguez WARN_ONCE(!reg_regdb_size, "db.txt is empty, you should update it..."); 52480007efeSLuis R. Rodriguez } 5253b377ea9SJohn W. Linville #else 52680007efeSLuis R. Rodriguez static inline void reg_regdb_size_check(void) {} 527fd453d3cSJohannes Berg static inline int reg_query_builtin(const char *alpha2) 528c7d319e5SJohannes Berg { 529c7d319e5SJohannes Berg return -ENODATA; 530c7d319e5SJohannes Berg } 5313b377ea9SJohn W. Linville #endif /* CONFIG_CFG80211_INTERNAL_REGDB */ 5323b377ea9SJohn W. Linville 533b6863036SJohannes Berg #ifdef CONFIG_CFG80211_CRDA_SUPPORT 534b6863036SJohannes Berg /* Max number of consecutive attempts to communicate with CRDA */ 535b6863036SJohannes Berg #define REG_MAX_CRDA_TIMEOUTS 10 536b6863036SJohannes Berg 537b6863036SJohannes Berg static u32 reg_crda_timeouts; 538b6863036SJohannes Berg 539b6863036SJohannes Berg static void crda_timeout_work(struct work_struct *work); 540b6863036SJohannes Berg static DECLARE_DELAYED_WORK(crda_timeout, crda_timeout_work); 541b6863036SJohannes Berg 542b6863036SJohannes Berg static void crda_timeout_work(struct work_struct *work) 543b6863036SJohannes Berg { 544b6863036SJohannes Berg REG_DBG_PRINT("Timeout while waiting for CRDA to reply, restoring regulatory settings\n"); 545b6863036SJohannes Berg rtnl_lock(); 546b6863036SJohannes Berg reg_crda_timeouts++; 547b6863036SJohannes Berg restore_regulatory_settings(true); 548b6863036SJohannes Berg rtnl_unlock(); 549b6863036SJohannes Berg } 550b6863036SJohannes Berg 551b6863036SJohannes Berg static void cancel_crda_timeout(void) 552b6863036SJohannes Berg { 553b6863036SJohannes Berg cancel_delayed_work(&crda_timeout); 554b6863036SJohannes Berg } 555b6863036SJohannes Berg 556b6863036SJohannes Berg static void cancel_crda_timeout_sync(void) 557b6863036SJohannes Berg { 558b6863036SJohannes Berg cancel_delayed_work_sync(&crda_timeout); 559b6863036SJohannes Berg } 560b6863036SJohannes Berg 561b6863036SJohannes Berg static void reset_crda_timeouts(void) 562b6863036SJohannes Berg { 563b6863036SJohannes Berg reg_crda_timeouts = 0; 564b6863036SJohannes Berg } 565b6863036SJohannes Berg 566fb1fc7adSLuis R. Rodriguez /* 567fb1fc7adSLuis R. Rodriguez * This lets us keep regulatory code which is updated on a regulatory 5681226d258SJohannes Berg * basis in userspace. 569fb1fc7adSLuis R. Rodriguez */ 570b2e1b302SLuis R. Rodriguez static int call_crda(const char *alpha2) 571b2e1b302SLuis R. Rodriguez { 5721226d258SJohannes Berg char country[12]; 5731226d258SJohannes Berg char *env[] = { country, NULL }; 574c7d319e5SJohannes Berg int ret; 5751226d258SJohannes Berg 5761226d258SJohannes Berg snprintf(country, sizeof(country), "COUNTRY=%c%c", 5771226d258SJohannes Berg alpha2[0], alpha2[1]); 5781226d258SJohannes Berg 579c37722bdSIlan peer if (reg_crda_timeouts > REG_MAX_CRDA_TIMEOUTS) { 580042ab5fcSThomas Petazzoni pr_debug("Exceeded CRDA call max attempts. Not calling CRDA\n"); 581c37722bdSIlan peer return -EINVAL; 582c37722bdSIlan peer } 583c37722bdSIlan peer 584b2e1b302SLuis R. Rodriguez if (!is_world_regdom((char *) alpha2)) 585042ab5fcSThomas Petazzoni pr_debug("Calling CRDA for country: %c%c\n", 586b2e1b302SLuis R. Rodriguez alpha2[0], alpha2[1]); 587b2e1b302SLuis R. Rodriguez else 588042ab5fcSThomas Petazzoni pr_debug("Calling CRDA to update world regulatory domain\n"); 5898318d78aSJohannes Berg 590c7d319e5SJohannes Berg ret = kobject_uevent_env(®_pdev->dev.kobj, KOBJ_CHANGE, env); 591c7d319e5SJohannes Berg if (ret) 592c7d319e5SJohannes Berg return ret; 593c7d319e5SJohannes Berg 594c7d319e5SJohannes Berg queue_delayed_work(system_power_efficient_wq, 595b6863036SJohannes Berg &crda_timeout, msecs_to_jiffies(3142)); 596c7d319e5SJohannes Berg return 0; 597b2e1b302SLuis R. Rodriguez } 598b6863036SJohannes Berg #else 599b6863036SJohannes Berg static inline void cancel_crda_timeout(void) {} 600b6863036SJohannes Berg static inline void cancel_crda_timeout_sync(void) {} 601b6863036SJohannes Berg static inline void reset_crda_timeouts(void) {} 602b6863036SJohannes Berg static inline int call_crda(const char *alpha2) 603b6863036SJohannes Berg { 604b6863036SJohannes Berg return -ENODATA; 605b6863036SJohannes Berg } 606b6863036SJohannes Berg #endif /* CONFIG_CFG80211_CRDA_SUPPORT */ 607b2e1b302SLuis R. Rodriguez 608cecbb069SJohannes Berg static bool reg_query_database(struct regulatory_request *request) 609fe6631ffSLuis R. Rodriguez { 610c7d319e5SJohannes Berg /* query internal regulatory database (if it exists) */ 611fd453d3cSJohannes Berg if (reg_query_builtin(request->alpha2) == 0) 61225b20dbdSJohannes Berg return true; 613c7d319e5SJohannes Berg 614c7d319e5SJohannes Berg if (call_crda(request->alpha2) == 0) 615c7d319e5SJohannes Berg return true; 616c7d319e5SJohannes Berg 617c7d319e5SJohannes Berg return false; 618fe6631ffSLuis R. Rodriguez } 619fe6631ffSLuis R. Rodriguez 620e438768fSLuis R. Rodriguez bool reg_is_valid_request(const char *alpha2) 621b2e1b302SLuis R. Rodriguez { 622c492db37SJohannes Berg struct regulatory_request *lr = get_last_request(); 62361405e97SLuis R. Rodriguez 624c492db37SJohannes Berg if (!lr || lr->processed) 625f6037d09SJohannes Berg return false; 626f6037d09SJohannes Berg 627c492db37SJohannes Berg return alpha2_equal(lr->alpha2, alpha2); 628b2e1b302SLuis R. Rodriguez } 629b2e1b302SLuis R. Rodriguez 630e3961af1SJanusz Dziedzic static const struct ieee80211_regdomain *reg_get_regdomain(struct wiphy *wiphy) 631e3961af1SJanusz Dziedzic { 632e3961af1SJanusz Dziedzic struct regulatory_request *lr = get_last_request(); 633e3961af1SJanusz Dziedzic 634e3961af1SJanusz Dziedzic /* 635e3961af1SJanusz Dziedzic * Follow the driver's regulatory domain, if present, unless a country 636e3961af1SJanusz Dziedzic * IE has been processed or a user wants to help complaince further 637e3961af1SJanusz Dziedzic */ 638e3961af1SJanusz Dziedzic if (lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && 639e3961af1SJanusz Dziedzic lr->initiator != NL80211_REGDOM_SET_BY_USER && 640e3961af1SJanusz Dziedzic wiphy->regd) 641e3961af1SJanusz Dziedzic return get_wiphy_regdom(wiphy); 642e3961af1SJanusz Dziedzic 643e3961af1SJanusz Dziedzic return get_cfg80211_regdom(); 644e3961af1SJanusz Dziedzic } 645e3961af1SJanusz Dziedzic 646a6d4a534SArik Nemtsov static unsigned int 647a6d4a534SArik Nemtsov reg_get_max_bandwidth_from_range(const struct ieee80211_regdomain *rd, 64897524820SJanusz Dziedzic const struct ieee80211_reg_rule *rule) 64997524820SJanusz Dziedzic { 65097524820SJanusz Dziedzic const struct ieee80211_freq_range *freq_range = &rule->freq_range; 65197524820SJanusz Dziedzic const struct ieee80211_freq_range *freq_range_tmp; 65297524820SJanusz Dziedzic const struct ieee80211_reg_rule *tmp; 65397524820SJanusz Dziedzic u32 start_freq, end_freq, idx, no; 65497524820SJanusz Dziedzic 65597524820SJanusz Dziedzic for (idx = 0; idx < rd->n_reg_rules; idx++) 65697524820SJanusz Dziedzic if (rule == &rd->reg_rules[idx]) 65797524820SJanusz Dziedzic break; 65897524820SJanusz Dziedzic 65997524820SJanusz Dziedzic if (idx == rd->n_reg_rules) 66097524820SJanusz Dziedzic return 0; 66197524820SJanusz Dziedzic 66297524820SJanusz Dziedzic /* get start_freq */ 66397524820SJanusz Dziedzic no = idx; 66497524820SJanusz Dziedzic 66597524820SJanusz Dziedzic while (no) { 66697524820SJanusz Dziedzic tmp = &rd->reg_rules[--no]; 66797524820SJanusz Dziedzic freq_range_tmp = &tmp->freq_range; 66897524820SJanusz Dziedzic 66997524820SJanusz Dziedzic if (freq_range_tmp->end_freq_khz < freq_range->start_freq_khz) 67097524820SJanusz Dziedzic break; 67197524820SJanusz Dziedzic 67297524820SJanusz Dziedzic freq_range = freq_range_tmp; 67397524820SJanusz Dziedzic } 67497524820SJanusz Dziedzic 67597524820SJanusz Dziedzic start_freq = freq_range->start_freq_khz; 67697524820SJanusz Dziedzic 67797524820SJanusz Dziedzic /* get end_freq */ 67897524820SJanusz Dziedzic freq_range = &rule->freq_range; 67997524820SJanusz Dziedzic no = idx; 68097524820SJanusz Dziedzic 68197524820SJanusz Dziedzic while (no < rd->n_reg_rules - 1) { 68297524820SJanusz Dziedzic tmp = &rd->reg_rules[++no]; 68397524820SJanusz Dziedzic freq_range_tmp = &tmp->freq_range; 68497524820SJanusz Dziedzic 68597524820SJanusz Dziedzic if (freq_range_tmp->start_freq_khz > freq_range->end_freq_khz) 68697524820SJanusz Dziedzic break; 68797524820SJanusz Dziedzic 68897524820SJanusz Dziedzic freq_range = freq_range_tmp; 68997524820SJanusz Dziedzic } 69097524820SJanusz Dziedzic 69197524820SJanusz Dziedzic end_freq = freq_range->end_freq_khz; 69297524820SJanusz Dziedzic 69397524820SJanusz Dziedzic return end_freq - start_freq; 69497524820SJanusz Dziedzic } 69597524820SJanusz Dziedzic 696a6d4a534SArik Nemtsov unsigned int reg_get_max_bandwidth(const struct ieee80211_regdomain *rd, 697a6d4a534SArik Nemtsov const struct ieee80211_reg_rule *rule) 698a6d4a534SArik Nemtsov { 699a6d4a534SArik Nemtsov unsigned int bw = reg_get_max_bandwidth_from_range(rd, rule); 700a6d4a534SArik Nemtsov 701a6d4a534SArik Nemtsov if (rule->flags & NL80211_RRF_NO_160MHZ) 702a6d4a534SArik Nemtsov bw = min_t(unsigned int, bw, MHZ_TO_KHZ(80)); 703a6d4a534SArik Nemtsov if (rule->flags & NL80211_RRF_NO_80MHZ) 704a6d4a534SArik Nemtsov bw = min_t(unsigned int, bw, MHZ_TO_KHZ(40)); 705a6d4a534SArik Nemtsov 706a6d4a534SArik Nemtsov /* 707a6d4a534SArik Nemtsov * HT40+/HT40- limits are handled per-channel. Only limit BW if both 708a6d4a534SArik Nemtsov * are not allowed. 709a6d4a534SArik Nemtsov */ 710a6d4a534SArik Nemtsov if (rule->flags & NL80211_RRF_NO_HT40MINUS && 711a6d4a534SArik Nemtsov rule->flags & NL80211_RRF_NO_HT40PLUS) 712a6d4a534SArik Nemtsov bw = min_t(unsigned int, bw, MHZ_TO_KHZ(20)); 713a6d4a534SArik Nemtsov 714a6d4a534SArik Nemtsov return bw; 715a6d4a534SArik Nemtsov } 716a6d4a534SArik Nemtsov 717b2e1b302SLuis R. Rodriguez /* Sanity check on a regulatory rule */ 718a3d2eaf0SJohannes Berg static bool is_valid_reg_rule(const struct ieee80211_reg_rule *rule) 719b2e1b302SLuis R. Rodriguez { 720a3d2eaf0SJohannes Berg const struct ieee80211_freq_range *freq_range = &rule->freq_range; 721b2e1b302SLuis R. Rodriguez u32 freq_diff; 722b2e1b302SLuis R. Rodriguez 72391e99004SLuis R. Rodriguez if (freq_range->start_freq_khz <= 0 || freq_range->end_freq_khz <= 0) 724b2e1b302SLuis R. Rodriguez return false; 725b2e1b302SLuis R. Rodriguez 726b2e1b302SLuis R. Rodriguez if (freq_range->start_freq_khz > freq_range->end_freq_khz) 727b2e1b302SLuis R. Rodriguez return false; 728b2e1b302SLuis R. Rodriguez 729b2e1b302SLuis R. Rodriguez freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz; 730b2e1b302SLuis R. Rodriguez 731bd05f28eSRoel Kluin if (freq_range->end_freq_khz <= freq_range->start_freq_khz || 732bd05f28eSRoel Kluin freq_range->max_bandwidth_khz > freq_diff) 733b2e1b302SLuis R. Rodriguez return false; 734b2e1b302SLuis R. Rodriguez 735b2e1b302SLuis R. Rodriguez return true; 736b2e1b302SLuis R. Rodriguez } 737b2e1b302SLuis R. Rodriguez 738a3d2eaf0SJohannes Berg static bool is_valid_rd(const struct ieee80211_regdomain *rd) 739b2e1b302SLuis R. Rodriguez { 740a3d2eaf0SJohannes Berg const struct ieee80211_reg_rule *reg_rule = NULL; 741b2e1b302SLuis R. Rodriguez unsigned int i; 742b2e1b302SLuis R. Rodriguez 743b2e1b302SLuis R. Rodriguez if (!rd->n_reg_rules) 744b2e1b302SLuis R. Rodriguez return false; 745b2e1b302SLuis R. Rodriguez 74688dc1c3fSLuis R. Rodriguez if (WARN_ON(rd->n_reg_rules > NL80211_MAX_SUPP_REG_RULES)) 74788dc1c3fSLuis R. Rodriguez return false; 74888dc1c3fSLuis R. Rodriguez 749b2e1b302SLuis R. Rodriguez for (i = 0; i < rd->n_reg_rules; i++) { 750b2e1b302SLuis R. Rodriguez reg_rule = &rd->reg_rules[i]; 751b2e1b302SLuis R. Rodriguez if (!is_valid_reg_rule(reg_rule)) 752b2e1b302SLuis R. Rodriguez return false; 753b2e1b302SLuis R. Rodriguez } 754b2e1b302SLuis R. Rodriguez 755b2e1b302SLuis R. Rodriguez return true; 756b2e1b302SLuis R. Rodriguez } 757b2e1b302SLuis R. Rodriguez 758038659e7SLuis R. Rodriguez static bool reg_does_bw_fit(const struct ieee80211_freq_range *freq_range, 759fe7ef5e9SJohannes Berg u32 center_freq_khz, u32 bw_khz) 760b2e1b302SLuis R. Rodriguez { 761038659e7SLuis R. Rodriguez u32 start_freq_khz, end_freq_khz; 762038659e7SLuis R. Rodriguez 763038659e7SLuis R. Rodriguez start_freq_khz = center_freq_khz - (bw_khz/2); 764038659e7SLuis R. Rodriguez end_freq_khz = center_freq_khz + (bw_khz/2); 765038659e7SLuis R. Rodriguez 766b2e1b302SLuis R. Rodriguez if (start_freq_khz >= freq_range->start_freq_khz && 767b2e1b302SLuis R. Rodriguez end_freq_khz <= freq_range->end_freq_khz) 768038659e7SLuis R. Rodriguez return true; 769038659e7SLuis R. Rodriguez 770038659e7SLuis R. Rodriguez return false; 771b2e1b302SLuis R. Rodriguez } 772b2e1b302SLuis R. Rodriguez 7730c7dc45dSLuis R. Rodriguez /** 7740c7dc45dSLuis R. Rodriguez * freq_in_rule_band - tells us if a frequency is in a frequency band 7750c7dc45dSLuis R. Rodriguez * @freq_range: frequency rule we want to query 7760c7dc45dSLuis R. Rodriguez * @freq_khz: frequency we are inquiring about 7770c7dc45dSLuis R. Rodriguez * 7780c7dc45dSLuis R. Rodriguez * This lets us know if a specific frequency rule is or is not relevant to 7790c7dc45dSLuis R. Rodriguez * a specific frequency's band. Bands are device specific and artificial 78064629b9dSVladimir Kondratiev * definitions (the "2.4 GHz band", the "5 GHz band" and the "60GHz band"), 78164629b9dSVladimir Kondratiev * however it is safe for now to assume that a frequency rule should not be 78264629b9dSVladimir Kondratiev * part of a frequency's band if the start freq or end freq are off by more 78364629b9dSVladimir Kondratiev * than 2 GHz for the 2.4 and 5 GHz bands, and by more than 10 GHz for the 78464629b9dSVladimir Kondratiev * 60 GHz band. 7850c7dc45dSLuis R. Rodriguez * This resolution can be lowered and should be considered as we add 7860c7dc45dSLuis R. Rodriguez * regulatory rule support for other "bands". 7870c7dc45dSLuis R. Rodriguez **/ 7880c7dc45dSLuis R. Rodriguez static bool freq_in_rule_band(const struct ieee80211_freq_range *freq_range, 7890c7dc45dSLuis R. Rodriguez u32 freq_khz) 7900c7dc45dSLuis R. Rodriguez { 7910c7dc45dSLuis R. Rodriguez #define ONE_GHZ_IN_KHZ 1000000 79264629b9dSVladimir Kondratiev /* 79364629b9dSVladimir Kondratiev * From 802.11ad: directional multi-gigabit (DMG): 79464629b9dSVladimir Kondratiev * Pertaining to operation in a frequency band containing a channel 79564629b9dSVladimir Kondratiev * with the Channel starting frequency above 45 GHz. 79664629b9dSVladimir Kondratiev */ 79764629b9dSVladimir Kondratiev u32 limit = freq_khz > 45 * ONE_GHZ_IN_KHZ ? 79864629b9dSVladimir Kondratiev 10 * ONE_GHZ_IN_KHZ : 2 * ONE_GHZ_IN_KHZ; 79964629b9dSVladimir Kondratiev if (abs(freq_khz - freq_range->start_freq_khz) <= limit) 8000c7dc45dSLuis R. Rodriguez return true; 80164629b9dSVladimir Kondratiev if (abs(freq_khz - freq_range->end_freq_khz) <= limit) 8020c7dc45dSLuis R. Rodriguez return true; 8030c7dc45dSLuis R. Rodriguez return false; 8040c7dc45dSLuis R. Rodriguez #undef ONE_GHZ_IN_KHZ 8050c7dc45dSLuis R. Rodriguez } 8060c7dc45dSLuis R. Rodriguez 807fb1fc7adSLuis R. Rodriguez /* 808adbfb058SLuis R. Rodriguez * Later on we can perhaps use the more restrictive DFS 809adbfb058SLuis R. Rodriguez * region but we don't have information for that yet so 810adbfb058SLuis R. Rodriguez * for now simply disallow conflicts. 811adbfb058SLuis R. Rodriguez */ 812adbfb058SLuis R. Rodriguez static enum nl80211_dfs_regions 813adbfb058SLuis R. Rodriguez reg_intersect_dfs_region(const enum nl80211_dfs_regions dfs_region1, 814adbfb058SLuis R. Rodriguez const enum nl80211_dfs_regions dfs_region2) 815adbfb058SLuis R. Rodriguez { 816adbfb058SLuis R. Rodriguez if (dfs_region1 != dfs_region2) 817adbfb058SLuis R. Rodriguez return NL80211_DFS_UNSET; 818adbfb058SLuis R. Rodriguez return dfs_region1; 819adbfb058SLuis R. Rodriguez } 820adbfb058SLuis R. Rodriguez 821adbfb058SLuis R. Rodriguez /* 822fb1fc7adSLuis R. Rodriguez * Helper for regdom_intersect(), this does the real 823fb1fc7adSLuis R. Rodriguez * mathematical intersection fun 824fb1fc7adSLuis R. Rodriguez */ 82597524820SJanusz Dziedzic static int reg_rules_intersect(const struct ieee80211_regdomain *rd1, 82697524820SJanusz Dziedzic const struct ieee80211_regdomain *rd2, 82797524820SJanusz Dziedzic const struct ieee80211_reg_rule *rule1, 8289c96477dSLuis R. Rodriguez const struct ieee80211_reg_rule *rule2, 8299c96477dSLuis R. Rodriguez struct ieee80211_reg_rule *intersected_rule) 8309c96477dSLuis R. Rodriguez { 8319c96477dSLuis R. Rodriguez const struct ieee80211_freq_range *freq_range1, *freq_range2; 8329c96477dSLuis R. Rodriguez struct ieee80211_freq_range *freq_range; 8339c96477dSLuis R. Rodriguez const struct ieee80211_power_rule *power_rule1, *power_rule2; 8349c96477dSLuis R. Rodriguez struct ieee80211_power_rule *power_rule; 83597524820SJanusz Dziedzic u32 freq_diff, max_bandwidth1, max_bandwidth2; 8369c96477dSLuis R. Rodriguez 8379c96477dSLuis R. Rodriguez freq_range1 = &rule1->freq_range; 8389c96477dSLuis R. Rodriguez freq_range2 = &rule2->freq_range; 8399c96477dSLuis R. Rodriguez freq_range = &intersected_rule->freq_range; 8409c96477dSLuis R. Rodriguez 8419c96477dSLuis R. Rodriguez power_rule1 = &rule1->power_rule; 8429c96477dSLuis R. Rodriguez power_rule2 = &rule2->power_rule; 8439c96477dSLuis R. Rodriguez power_rule = &intersected_rule->power_rule; 8449c96477dSLuis R. Rodriguez 8459c96477dSLuis R. Rodriguez freq_range->start_freq_khz = max(freq_range1->start_freq_khz, 8469c96477dSLuis R. Rodriguez freq_range2->start_freq_khz); 8479c96477dSLuis R. Rodriguez freq_range->end_freq_khz = min(freq_range1->end_freq_khz, 8489c96477dSLuis R. Rodriguez freq_range2->end_freq_khz); 84997524820SJanusz Dziedzic 85097524820SJanusz Dziedzic max_bandwidth1 = freq_range1->max_bandwidth_khz; 85197524820SJanusz Dziedzic max_bandwidth2 = freq_range2->max_bandwidth_khz; 85297524820SJanusz Dziedzic 853b0dfd2eaSJanusz Dziedzic if (rule1->flags & NL80211_RRF_AUTO_BW) 85497524820SJanusz Dziedzic max_bandwidth1 = reg_get_max_bandwidth(rd1, rule1); 855b0dfd2eaSJanusz Dziedzic if (rule2->flags & NL80211_RRF_AUTO_BW) 85697524820SJanusz Dziedzic max_bandwidth2 = reg_get_max_bandwidth(rd2, rule2); 85797524820SJanusz Dziedzic 85897524820SJanusz Dziedzic freq_range->max_bandwidth_khz = min(max_bandwidth1, max_bandwidth2); 8599c96477dSLuis R. Rodriguez 860b0dfd2eaSJanusz Dziedzic intersected_rule->flags = rule1->flags | rule2->flags; 861b0dfd2eaSJanusz Dziedzic 862b0dfd2eaSJanusz Dziedzic /* 863b0dfd2eaSJanusz Dziedzic * In case NL80211_RRF_AUTO_BW requested for both rules 864b0dfd2eaSJanusz Dziedzic * set AUTO_BW in intersected rule also. Next we will 865b0dfd2eaSJanusz Dziedzic * calculate BW correctly in handle_channel function. 866b0dfd2eaSJanusz Dziedzic * In other case remove AUTO_BW flag while we calculate 867b0dfd2eaSJanusz Dziedzic * maximum bandwidth correctly and auto calculation is 868b0dfd2eaSJanusz Dziedzic * not required. 869b0dfd2eaSJanusz Dziedzic */ 870b0dfd2eaSJanusz Dziedzic if ((rule1->flags & NL80211_RRF_AUTO_BW) && 871b0dfd2eaSJanusz Dziedzic (rule2->flags & NL80211_RRF_AUTO_BW)) 872b0dfd2eaSJanusz Dziedzic intersected_rule->flags |= NL80211_RRF_AUTO_BW; 873b0dfd2eaSJanusz Dziedzic else 874b0dfd2eaSJanusz Dziedzic intersected_rule->flags &= ~NL80211_RRF_AUTO_BW; 875b0dfd2eaSJanusz Dziedzic 8769c96477dSLuis R. Rodriguez freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz; 8779c96477dSLuis R. Rodriguez if (freq_range->max_bandwidth_khz > freq_diff) 8789c96477dSLuis R. Rodriguez freq_range->max_bandwidth_khz = freq_diff; 8799c96477dSLuis R. Rodriguez 8809c96477dSLuis R. Rodriguez power_rule->max_eirp = min(power_rule1->max_eirp, 8819c96477dSLuis R. Rodriguez power_rule2->max_eirp); 8829c96477dSLuis R. Rodriguez power_rule->max_antenna_gain = min(power_rule1->max_antenna_gain, 8839c96477dSLuis R. Rodriguez power_rule2->max_antenna_gain); 8849c96477dSLuis R. Rodriguez 885089027e5SJanusz Dziedzic intersected_rule->dfs_cac_ms = max(rule1->dfs_cac_ms, 886089027e5SJanusz Dziedzic rule2->dfs_cac_ms); 887089027e5SJanusz Dziedzic 8889c96477dSLuis R. Rodriguez if (!is_valid_reg_rule(intersected_rule)) 8899c96477dSLuis R. Rodriguez return -EINVAL; 8909c96477dSLuis R. Rodriguez 8919c96477dSLuis R. Rodriguez return 0; 8929c96477dSLuis R. Rodriguez } 8939c96477dSLuis R. Rodriguez 894a62a1aedSEliad Peller /* check whether old rule contains new rule */ 895a62a1aedSEliad Peller static bool rule_contains(struct ieee80211_reg_rule *r1, 896a62a1aedSEliad Peller struct ieee80211_reg_rule *r2) 897a62a1aedSEliad Peller { 898a62a1aedSEliad Peller /* for simplicity, currently consider only same flags */ 899a62a1aedSEliad Peller if (r1->flags != r2->flags) 900a62a1aedSEliad Peller return false; 901a62a1aedSEliad Peller 902a62a1aedSEliad Peller /* verify r1 is more restrictive */ 903a62a1aedSEliad Peller if ((r1->power_rule.max_antenna_gain > 904a62a1aedSEliad Peller r2->power_rule.max_antenna_gain) || 905a62a1aedSEliad Peller r1->power_rule.max_eirp > r2->power_rule.max_eirp) 906a62a1aedSEliad Peller return false; 907a62a1aedSEliad Peller 908a62a1aedSEliad Peller /* make sure r2's range is contained within r1 */ 909a62a1aedSEliad Peller if (r1->freq_range.start_freq_khz > r2->freq_range.start_freq_khz || 910a62a1aedSEliad Peller r1->freq_range.end_freq_khz < r2->freq_range.end_freq_khz) 911a62a1aedSEliad Peller return false; 912a62a1aedSEliad Peller 913a62a1aedSEliad Peller /* and finally verify that r1.max_bw >= r2.max_bw */ 914a62a1aedSEliad Peller if (r1->freq_range.max_bandwidth_khz < 915a62a1aedSEliad Peller r2->freq_range.max_bandwidth_khz) 916a62a1aedSEliad Peller return false; 917a62a1aedSEliad Peller 918a62a1aedSEliad Peller return true; 919a62a1aedSEliad Peller } 920a62a1aedSEliad Peller 921a62a1aedSEliad Peller /* add or extend current rules. do nothing if rule is already contained */ 922a62a1aedSEliad Peller static void add_rule(struct ieee80211_reg_rule *rule, 923a62a1aedSEliad Peller struct ieee80211_reg_rule *reg_rules, u32 *n_rules) 924a62a1aedSEliad Peller { 925a62a1aedSEliad Peller struct ieee80211_reg_rule *tmp_rule; 926a62a1aedSEliad Peller int i; 927a62a1aedSEliad Peller 928a62a1aedSEliad Peller for (i = 0; i < *n_rules; i++) { 929a62a1aedSEliad Peller tmp_rule = ®_rules[i]; 930a62a1aedSEliad Peller /* rule is already contained - do nothing */ 931a62a1aedSEliad Peller if (rule_contains(tmp_rule, rule)) 932a62a1aedSEliad Peller return; 933a62a1aedSEliad Peller 934a62a1aedSEliad Peller /* extend rule if possible */ 935a62a1aedSEliad Peller if (rule_contains(rule, tmp_rule)) { 936a62a1aedSEliad Peller memcpy(tmp_rule, rule, sizeof(*rule)); 937a62a1aedSEliad Peller return; 938a62a1aedSEliad Peller } 939a62a1aedSEliad Peller } 940a62a1aedSEliad Peller 941a62a1aedSEliad Peller memcpy(®_rules[*n_rules], rule, sizeof(*rule)); 942a62a1aedSEliad Peller (*n_rules)++; 943a62a1aedSEliad Peller } 944a62a1aedSEliad Peller 9459c96477dSLuis R. Rodriguez /** 9469c96477dSLuis R. Rodriguez * regdom_intersect - do the intersection between two regulatory domains 9479c96477dSLuis R. Rodriguez * @rd1: first regulatory domain 9489c96477dSLuis R. Rodriguez * @rd2: second regulatory domain 9499c96477dSLuis R. Rodriguez * 9509c96477dSLuis R. Rodriguez * Use this function to get the intersection between two regulatory domains. 9519c96477dSLuis R. Rodriguez * Once completed we will mark the alpha2 for the rd as intersected, "98", 9529c96477dSLuis R. Rodriguez * as no one single alpha2 can represent this regulatory domain. 9539c96477dSLuis R. Rodriguez * 9549c96477dSLuis R. Rodriguez * Returns a pointer to the regulatory domain structure which will hold the 9559c96477dSLuis R. Rodriguez * resulting intersection of rules between rd1 and rd2. We will 9569c96477dSLuis R. Rodriguez * kzalloc() this structure for you. 9579c96477dSLuis R. Rodriguez */ 9581a919318SJohannes Berg static struct ieee80211_regdomain * 9591a919318SJohannes Berg regdom_intersect(const struct ieee80211_regdomain *rd1, 9609c96477dSLuis R. Rodriguez const struct ieee80211_regdomain *rd2) 9619c96477dSLuis R. Rodriguez { 9629c96477dSLuis R. Rodriguez int r, size_of_regd; 9639c96477dSLuis R. Rodriguez unsigned int x, y; 964a62a1aedSEliad Peller unsigned int num_rules = 0; 9659c96477dSLuis R. Rodriguez const struct ieee80211_reg_rule *rule1, *rule2; 966a62a1aedSEliad Peller struct ieee80211_reg_rule intersected_rule; 9679c96477dSLuis R. Rodriguez struct ieee80211_regdomain *rd; 9689c96477dSLuis R. Rodriguez 9699c96477dSLuis R. Rodriguez if (!rd1 || !rd2) 9709c96477dSLuis R. Rodriguez return NULL; 9719c96477dSLuis R. Rodriguez 972fb1fc7adSLuis R. Rodriguez /* 973fb1fc7adSLuis R. Rodriguez * First we get a count of the rules we'll need, then we actually 9749c96477dSLuis R. Rodriguez * build them. This is to so we can malloc() and free() a 9759c96477dSLuis R. Rodriguez * regdomain once. The reason we use reg_rules_intersect() here 9769c96477dSLuis R. Rodriguez * is it will return -EINVAL if the rule computed makes no sense. 977fb1fc7adSLuis R. Rodriguez * All rules that do check out OK are valid. 978fb1fc7adSLuis R. Rodriguez */ 9799c96477dSLuis R. Rodriguez 9809c96477dSLuis R. Rodriguez for (x = 0; x < rd1->n_reg_rules; x++) { 9819c96477dSLuis R. Rodriguez rule1 = &rd1->reg_rules[x]; 9829c96477dSLuis R. Rodriguez for (y = 0; y < rd2->n_reg_rules; y++) { 9839c96477dSLuis R. Rodriguez rule2 = &rd2->reg_rules[y]; 98497524820SJanusz Dziedzic if (!reg_rules_intersect(rd1, rd2, rule1, rule2, 985a62a1aedSEliad Peller &intersected_rule)) 9869c96477dSLuis R. Rodriguez num_rules++; 9879c96477dSLuis R. Rodriguez } 9889c96477dSLuis R. Rodriguez } 9899c96477dSLuis R. Rodriguez 9909c96477dSLuis R. Rodriguez if (!num_rules) 9919c96477dSLuis R. Rodriguez return NULL; 9929c96477dSLuis R. Rodriguez 9939c96477dSLuis R. Rodriguez size_of_regd = sizeof(struct ieee80211_regdomain) + 99482f20856SJohannes Berg num_rules * sizeof(struct ieee80211_reg_rule); 9959c96477dSLuis R. Rodriguez 9969c96477dSLuis R. Rodriguez rd = kzalloc(size_of_regd, GFP_KERNEL); 9979c96477dSLuis R. Rodriguez if (!rd) 9989c96477dSLuis R. Rodriguez return NULL; 9999c96477dSLuis R. Rodriguez 1000a62a1aedSEliad Peller for (x = 0; x < rd1->n_reg_rules; x++) { 10019c96477dSLuis R. Rodriguez rule1 = &rd1->reg_rules[x]; 1002a62a1aedSEliad Peller for (y = 0; y < rd2->n_reg_rules; y++) { 10039c96477dSLuis R. Rodriguez rule2 = &rd2->reg_rules[y]; 100497524820SJanusz Dziedzic r = reg_rules_intersect(rd1, rd2, rule1, rule2, 1005a62a1aedSEliad Peller &intersected_rule); 1006fb1fc7adSLuis R. Rodriguez /* 1007fb1fc7adSLuis R. Rodriguez * No need to memset here the intersected rule here as 1008fb1fc7adSLuis R. Rodriguez * we're not using the stack anymore 1009fb1fc7adSLuis R. Rodriguez */ 10109c96477dSLuis R. Rodriguez if (r) 10119c96477dSLuis R. Rodriguez continue; 1012a62a1aedSEliad Peller 1013a62a1aedSEliad Peller add_rule(&intersected_rule, rd->reg_rules, 1014a62a1aedSEliad Peller &rd->n_reg_rules); 10159c96477dSLuis R. Rodriguez } 10169c96477dSLuis R. Rodriguez } 10179c96477dSLuis R. Rodriguez 10189c96477dSLuis R. Rodriguez rd->alpha2[0] = '9'; 10199c96477dSLuis R. Rodriguez rd->alpha2[1] = '8'; 1020adbfb058SLuis R. Rodriguez rd->dfs_region = reg_intersect_dfs_region(rd1->dfs_region, 1021adbfb058SLuis R. Rodriguez rd2->dfs_region); 10229c96477dSLuis R. Rodriguez 10239c96477dSLuis R. Rodriguez return rd; 10249c96477dSLuis R. Rodriguez } 10259c96477dSLuis R. Rodriguez 1026fb1fc7adSLuis R. Rodriguez /* 1027fb1fc7adSLuis R. Rodriguez * XXX: add support for the rest of enum nl80211_reg_rule_flags, we may 1028fb1fc7adSLuis R. Rodriguez * want to just have the channel structure use these 1029fb1fc7adSLuis R. Rodriguez */ 1030b2e1b302SLuis R. Rodriguez static u32 map_regdom_flags(u32 rd_flags) 1031b2e1b302SLuis R. Rodriguez { 1032b2e1b302SLuis R. Rodriguez u32 channel_flags = 0; 10338fe02e16SLuis R. Rodriguez if (rd_flags & NL80211_RRF_NO_IR_ALL) 10348fe02e16SLuis R. Rodriguez channel_flags |= IEEE80211_CHAN_NO_IR; 1035b2e1b302SLuis R. Rodriguez if (rd_flags & NL80211_RRF_DFS) 1036b2e1b302SLuis R. Rodriguez channel_flags |= IEEE80211_CHAN_RADAR; 103703f6b084SSeth Forshee if (rd_flags & NL80211_RRF_NO_OFDM) 103803f6b084SSeth Forshee channel_flags |= IEEE80211_CHAN_NO_OFDM; 1039570dbde1SDavid Spinadel if (rd_flags & NL80211_RRF_NO_OUTDOOR) 1040570dbde1SDavid Spinadel channel_flags |= IEEE80211_CHAN_INDOOR_ONLY; 104106f207fcSArik Nemtsov if (rd_flags & NL80211_RRF_IR_CONCURRENT) 104206f207fcSArik Nemtsov channel_flags |= IEEE80211_CHAN_IR_CONCURRENT; 1043a6d4a534SArik Nemtsov if (rd_flags & NL80211_RRF_NO_HT40MINUS) 1044a6d4a534SArik Nemtsov channel_flags |= IEEE80211_CHAN_NO_HT40MINUS; 1045a6d4a534SArik Nemtsov if (rd_flags & NL80211_RRF_NO_HT40PLUS) 1046a6d4a534SArik Nemtsov channel_flags |= IEEE80211_CHAN_NO_HT40PLUS; 1047a6d4a534SArik Nemtsov if (rd_flags & NL80211_RRF_NO_80MHZ) 1048a6d4a534SArik Nemtsov channel_flags |= IEEE80211_CHAN_NO_80MHZ; 1049a6d4a534SArik Nemtsov if (rd_flags & NL80211_RRF_NO_160MHZ) 1050a6d4a534SArik Nemtsov channel_flags |= IEEE80211_CHAN_NO_160MHZ; 1051b2e1b302SLuis R. Rodriguez return channel_flags; 1052b2e1b302SLuis R. Rodriguez } 1053b2e1b302SLuis R. Rodriguez 1054361c9c8bSJohannes Berg static const struct ieee80211_reg_rule * 105549172874SMichal Sojka freq_reg_info_regd(u32 center_freq, 10564edd5698SMatthias May const struct ieee80211_regdomain *regd, u32 bw) 10578318d78aSJohannes Berg { 10588318d78aSJohannes Berg int i; 10590c7dc45dSLuis R. Rodriguez bool band_rule_found = false; 1060038659e7SLuis R. Rodriguez bool bw_fits = false; 1061038659e7SLuis R. Rodriguez 10623e0c3ff3SLuis R. Rodriguez if (!regd) 1063361c9c8bSJohannes Berg return ERR_PTR(-EINVAL); 1064b2e1b302SLuis R. Rodriguez 10653e0c3ff3SLuis R. Rodriguez for (i = 0; i < regd->n_reg_rules; i++) { 1066b2e1b302SLuis R. Rodriguez const struct ieee80211_reg_rule *rr; 1067b2e1b302SLuis R. Rodriguez const struct ieee80211_freq_range *fr = NULL; 1068b2e1b302SLuis R. Rodriguez 10693e0c3ff3SLuis R. Rodriguez rr = ®d->reg_rules[i]; 1070b2e1b302SLuis R. Rodriguez fr = &rr->freq_range; 10710c7dc45dSLuis R. Rodriguez 1072fb1fc7adSLuis R. Rodriguez /* 1073fb1fc7adSLuis R. Rodriguez * We only need to know if one frequency rule was 10740c7dc45dSLuis R. Rodriguez * was in center_freq's band, that's enough, so lets 1075fb1fc7adSLuis R. Rodriguez * not overwrite it once found 1076fb1fc7adSLuis R. Rodriguez */ 10770c7dc45dSLuis R. Rodriguez if (!band_rule_found) 10780c7dc45dSLuis R. Rodriguez band_rule_found = freq_in_rule_band(fr, center_freq); 10790c7dc45dSLuis R. Rodriguez 10804edd5698SMatthias May bw_fits = reg_does_bw_fit(fr, center_freq, bw); 10810c7dc45dSLuis R. Rodriguez 1082361c9c8bSJohannes Berg if (band_rule_found && bw_fits) 1083361c9c8bSJohannes Berg return rr; 10848318d78aSJohannes Berg } 10858318d78aSJohannes Berg 10860c7dc45dSLuis R. Rodriguez if (!band_rule_found) 1087361c9c8bSJohannes Berg return ERR_PTR(-ERANGE); 10880c7dc45dSLuis R. Rodriguez 1089361c9c8bSJohannes Berg return ERR_PTR(-EINVAL); 1090b2e1b302SLuis R. Rodriguez } 1091b2e1b302SLuis R. Rodriguez 10928de1c63bSJohannes Berg static const struct ieee80211_reg_rule * 10938de1c63bSJohannes Berg __freq_reg_info(struct wiphy *wiphy, u32 center_freq, u32 min_bw) 10944edd5698SMatthias May { 10954edd5698SMatthias May const struct ieee80211_regdomain *regd = reg_get_regdomain(wiphy); 10964edd5698SMatthias May const struct ieee80211_reg_rule *reg_rule = NULL; 10974edd5698SMatthias May u32 bw; 10984edd5698SMatthias May 10994edd5698SMatthias May for (bw = MHZ_TO_KHZ(20); bw >= min_bw; bw = bw / 2) { 110049172874SMichal Sojka reg_rule = freq_reg_info_regd(center_freq, regd, bw); 11014edd5698SMatthias May if (!IS_ERR(reg_rule)) 11024edd5698SMatthias May return reg_rule; 11034edd5698SMatthias May } 11044edd5698SMatthias May 11054edd5698SMatthias May return reg_rule; 11064edd5698SMatthias May } 11074edd5698SMatthias May 1108361c9c8bSJohannes Berg const struct ieee80211_reg_rule *freq_reg_info(struct wiphy *wiphy, 1109361c9c8bSJohannes Berg u32 center_freq) 11101fa25e41SLuis R. Rodriguez { 11114edd5698SMatthias May return __freq_reg_info(wiphy, center_freq, MHZ_TO_KHZ(20)); 11121fa25e41SLuis R. Rodriguez } 11134f366c5dSJohn W. Linville EXPORT_SYMBOL(freq_reg_info); 1114b2e1b302SLuis R. Rodriguez 1115034c6d6eSLuis R. Rodriguez const char *reg_initiator_name(enum nl80211_reg_initiator initiator) 1116926a0a09SLuis R. Rodriguez { 1117926a0a09SLuis R. Rodriguez switch (initiator) { 1118926a0a09SLuis R. Rodriguez case NL80211_REGDOM_SET_BY_CORE: 1119034c6d6eSLuis R. Rodriguez return "core"; 1120926a0a09SLuis R. Rodriguez case NL80211_REGDOM_SET_BY_USER: 1121034c6d6eSLuis R. Rodriguez return "user"; 1122926a0a09SLuis R. Rodriguez case NL80211_REGDOM_SET_BY_DRIVER: 1123034c6d6eSLuis R. Rodriguez return "driver"; 1124926a0a09SLuis R. Rodriguez case NL80211_REGDOM_SET_BY_COUNTRY_IE: 1125034c6d6eSLuis R. Rodriguez return "country IE"; 1126926a0a09SLuis R. Rodriguez default: 1127926a0a09SLuis R. Rodriguez WARN_ON(1); 1128034c6d6eSLuis R. Rodriguez return "bug"; 1129926a0a09SLuis R. Rodriguez } 1130926a0a09SLuis R. Rodriguez } 1131034c6d6eSLuis R. Rodriguez EXPORT_SYMBOL(reg_initiator_name); 1132e702d3cfSLuis R. Rodriguez 1133b0dfd2eaSJanusz Dziedzic static void chan_reg_rule_print_dbg(const struct ieee80211_regdomain *regd, 1134b0dfd2eaSJanusz Dziedzic struct ieee80211_channel *chan, 1135e702d3cfSLuis R. Rodriguez const struct ieee80211_reg_rule *reg_rule) 1136e702d3cfSLuis R. Rodriguez { 113781e92574SJohannes Berg #ifdef CONFIG_CFG80211_REG_DEBUG 1138e702d3cfSLuis R. Rodriguez const struct ieee80211_power_rule *power_rule; 1139e702d3cfSLuis R. Rodriguez const struct ieee80211_freq_range *freq_range; 1140b0dfd2eaSJanusz Dziedzic char max_antenna_gain[32], bw[32]; 1141e702d3cfSLuis R. Rodriguez 1142e702d3cfSLuis R. Rodriguez power_rule = ®_rule->power_rule; 1143e702d3cfSLuis R. Rodriguez freq_range = ®_rule->freq_range; 1144e702d3cfSLuis R. Rodriguez 1145e702d3cfSLuis R. Rodriguez if (!power_rule->max_antenna_gain) 1146b0dfd2eaSJanusz Dziedzic snprintf(max_antenna_gain, sizeof(max_antenna_gain), "N/A"); 1147e702d3cfSLuis R. Rodriguez else 11489f506802SJohannes Berg snprintf(max_antenna_gain, sizeof(max_antenna_gain), "%d mBi", 1149b0dfd2eaSJanusz Dziedzic power_rule->max_antenna_gain); 1150b0dfd2eaSJanusz Dziedzic 1151b0dfd2eaSJanusz Dziedzic if (reg_rule->flags & NL80211_RRF_AUTO_BW) 1152b0dfd2eaSJanusz Dziedzic snprintf(bw, sizeof(bw), "%d KHz, %d KHz AUTO", 1153b0dfd2eaSJanusz Dziedzic freq_range->max_bandwidth_khz, 1154b0dfd2eaSJanusz Dziedzic reg_get_max_bandwidth(regd, reg_rule)); 1155b0dfd2eaSJanusz Dziedzic else 1156b0dfd2eaSJanusz Dziedzic snprintf(bw, sizeof(bw), "%d KHz", 1157b0dfd2eaSJanusz Dziedzic freq_range->max_bandwidth_khz); 1158e702d3cfSLuis R. Rodriguez 1159fe7ef5e9SJohannes Berg REG_DBG_PRINT("Updating information on frequency %d MHz with regulatory rule:\n", 1160fe7ef5e9SJohannes Berg chan->center_freq); 1161e702d3cfSLuis R. Rodriguez 11629f506802SJohannes Berg REG_DBG_PRINT("(%d KHz - %d KHz @ %s), (%s, %d mBm)\n", 11631a919318SJohannes Berg freq_range->start_freq_khz, freq_range->end_freq_khz, 1164b0dfd2eaSJanusz Dziedzic bw, max_antenna_gain, 1165e702d3cfSLuis R. Rodriguez power_rule->max_eirp); 1166926a0a09SLuis R. Rodriguez #endif 116781e92574SJohannes Berg } 1168926a0a09SLuis R. Rodriguez 1169e33e2241SJohannes Berg /* 1170e33e2241SJohannes Berg * Note that right now we assume the desired channel bandwidth 1171e33e2241SJohannes Berg * is always 20 MHz for each individual channel (HT40 uses 20 MHz 1172e33e2241SJohannes Berg * per channel, the primary and the extension channel). 1173038659e7SLuis R. Rodriguez */ 11747ca43d03SLuis R. Rodriguez static void handle_channel(struct wiphy *wiphy, 11757ca43d03SLuis R. Rodriguez enum nl80211_reg_initiator initiator, 1176fdc9d7b2SJohannes Berg struct ieee80211_channel *chan) 1177b2e1b302SLuis R. Rodriguez { 1178038659e7SLuis R. Rodriguez u32 flags, bw_flags = 0; 1179b2e1b302SLuis R. Rodriguez const struct ieee80211_reg_rule *reg_rule = NULL; 1180b2e1b302SLuis R. Rodriguez const struct ieee80211_power_rule *power_rule = NULL; 1181038659e7SLuis R. Rodriguez const struct ieee80211_freq_range *freq_range = NULL; 1182fe33eb39SLuis R. Rodriguez struct wiphy *request_wiphy = NULL; 1183c492db37SJohannes Berg struct regulatory_request *lr = get_last_request(); 118497524820SJanusz Dziedzic const struct ieee80211_regdomain *regd; 118597524820SJanusz Dziedzic u32 max_bandwidth_khz; 1186a92a3ce7SLuis R. Rodriguez 1187c492db37SJohannes Berg request_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx); 1188a92a3ce7SLuis R. Rodriguez 1189a92a3ce7SLuis R. Rodriguez flags = chan->orig_flags; 1190b2e1b302SLuis R. Rodriguez 1191361c9c8bSJohannes Berg reg_rule = freq_reg_info(wiphy, MHZ_TO_KHZ(chan->center_freq)); 1192361c9c8bSJohannes Berg if (IS_ERR(reg_rule)) { 1193ca4ffe8fSLuis R. Rodriguez /* 1194ca4ffe8fSLuis R. Rodriguez * We will disable all channels that do not match our 119525985edcSLucas De Marchi * received regulatory rule unless the hint is coming 1196ca4ffe8fSLuis R. Rodriguez * from a Country IE and the Country IE had no information 1197ca4ffe8fSLuis R. Rodriguez * about a band. The IEEE 802.11 spec allows for an AP 1198ca4ffe8fSLuis R. Rodriguez * to send only a subset of the regulatory rules allowed, 1199ca4ffe8fSLuis R. Rodriguez * so an AP in the US that only supports 2.4 GHz may only send 1200ca4ffe8fSLuis R. Rodriguez * a country IE with information for the 2.4 GHz band 1201ca4ffe8fSLuis R. Rodriguez * while 5 GHz is still supported. 1202ca4ffe8fSLuis R. Rodriguez */ 1203ca4ffe8fSLuis R. Rodriguez if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE && 1204361c9c8bSJohannes Berg PTR_ERR(reg_rule) == -ERANGE) 12058318d78aSJohannes Berg return; 12068318d78aSJohannes Berg 1207cc493e4fSLuis R. Rodriguez if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER && 1208cc493e4fSLuis R. Rodriguez request_wiphy && request_wiphy == wiphy && 1209a2f73b6cSLuis R. Rodriguez request_wiphy->regulatory_flags & REGULATORY_STRICT_REG) { 1210cc493e4fSLuis R. Rodriguez REG_DBG_PRINT("Disabling freq %d MHz for good\n", 1211cc493e4fSLuis R. Rodriguez chan->center_freq); 1212cc493e4fSLuis R. Rodriguez chan->orig_flags |= IEEE80211_CHAN_DISABLED; 1213cc493e4fSLuis R. Rodriguez chan->flags = chan->orig_flags; 1214cc493e4fSLuis R. Rodriguez } else { 1215cc493e4fSLuis R. Rodriguez REG_DBG_PRINT("Disabling freq %d MHz\n", 1216cc493e4fSLuis R. Rodriguez chan->center_freq); 1217990de49fSJohannes Berg chan->flags |= IEEE80211_CHAN_DISABLED; 1218cc493e4fSLuis R. Rodriguez } 1219ca4ffe8fSLuis R. Rodriguez return; 1220ca4ffe8fSLuis R. Rodriguez } 1221ca4ffe8fSLuis R. Rodriguez 1222b0dfd2eaSJanusz Dziedzic regd = reg_get_regdomain(wiphy); 1223b0dfd2eaSJanusz Dziedzic chan_reg_rule_print_dbg(regd, chan, reg_rule); 1224e702d3cfSLuis R. Rodriguez 1225b2e1b302SLuis R. Rodriguez power_rule = ®_rule->power_rule; 1226038659e7SLuis R. Rodriguez freq_range = ®_rule->freq_range; 1227038659e7SLuis R. Rodriguez 122897524820SJanusz Dziedzic max_bandwidth_khz = freq_range->max_bandwidth_khz; 122997524820SJanusz Dziedzic /* Check if auto calculation requested */ 1230b0dfd2eaSJanusz Dziedzic if (reg_rule->flags & NL80211_RRF_AUTO_BW) 123197524820SJanusz Dziedzic max_bandwidth_khz = reg_get_max_bandwidth(regd, reg_rule); 123297524820SJanusz Dziedzic 12334edd5698SMatthias May /* If we get a reg_rule we can assume that at least 5Mhz fit */ 12344edd5698SMatthias May if (!reg_does_bw_fit(freq_range, MHZ_TO_KHZ(chan->center_freq), 12354edd5698SMatthias May MHZ_TO_KHZ(10))) 12364edd5698SMatthias May bw_flags |= IEEE80211_CHAN_NO_10MHZ; 12374edd5698SMatthias May if (!reg_does_bw_fit(freq_range, MHZ_TO_KHZ(chan->center_freq), 12384edd5698SMatthias May MHZ_TO_KHZ(20))) 12394edd5698SMatthias May bw_flags |= IEEE80211_CHAN_NO_20MHZ; 12404edd5698SMatthias May 12414edd5698SMatthias May if (max_bandwidth_khz < MHZ_TO_KHZ(10)) 12424edd5698SMatthias May bw_flags |= IEEE80211_CHAN_NO_10MHZ; 12434edd5698SMatthias May if (max_bandwidth_khz < MHZ_TO_KHZ(20)) 12444edd5698SMatthias May bw_flags |= IEEE80211_CHAN_NO_20MHZ; 124597524820SJanusz Dziedzic if (max_bandwidth_khz < MHZ_TO_KHZ(40)) 12464edd5698SMatthias May bw_flags |= IEEE80211_CHAN_NO_HT40; 124797524820SJanusz Dziedzic if (max_bandwidth_khz < MHZ_TO_KHZ(80)) 1248c7a6ee27SJohannes Berg bw_flags |= IEEE80211_CHAN_NO_80MHZ; 124997524820SJanusz Dziedzic if (max_bandwidth_khz < MHZ_TO_KHZ(160)) 1250c7a6ee27SJohannes Berg bw_flags |= IEEE80211_CHAN_NO_160MHZ; 1251b2e1b302SLuis R. Rodriguez 1252c492db37SJohannes Berg if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER && 1253806a9e39SLuis R. Rodriguez request_wiphy && request_wiphy == wiphy && 1254a2f73b6cSLuis R. Rodriguez request_wiphy->regulatory_flags & REGULATORY_STRICT_REG) { 1255fb1fc7adSLuis R. Rodriguez /* 125625985edcSLucas De Marchi * This guarantees the driver's requested regulatory domain 1257f976376dSLuis R. Rodriguez * will always be used as a base for further regulatory 1258fb1fc7adSLuis R. Rodriguez * settings 1259fb1fc7adSLuis R. Rodriguez */ 1260f976376dSLuis R. Rodriguez chan->flags = chan->orig_flags = 1261038659e7SLuis R. Rodriguez map_regdom_flags(reg_rule->flags) | bw_flags; 1262f976376dSLuis R. Rodriguez chan->max_antenna_gain = chan->orig_mag = 1263f976376dSLuis R. Rodriguez (int) MBI_TO_DBI(power_rule->max_antenna_gain); 1264279f0f55SFelix Fietkau chan->max_reg_power = chan->max_power = chan->orig_mpwr = 1265f976376dSLuis R. Rodriguez (int) MBM_TO_DBM(power_rule->max_eirp); 12664f267c11SJanusz Dziedzic 12674f267c11SJanusz Dziedzic if (chan->flags & IEEE80211_CHAN_RADAR) { 12684f267c11SJanusz Dziedzic chan->dfs_cac_ms = IEEE80211_DFS_MIN_CAC_TIME_MS; 12694f267c11SJanusz Dziedzic if (reg_rule->dfs_cac_ms) 12704f267c11SJanusz Dziedzic chan->dfs_cac_ms = reg_rule->dfs_cac_ms; 12714f267c11SJanusz Dziedzic } 12724f267c11SJanusz Dziedzic 1273f976376dSLuis R. Rodriguez return; 1274f976376dSLuis R. Rodriguez } 1275f976376dSLuis R. Rodriguez 127604f39047SSimon Wunderlich chan->dfs_state = NL80211_DFS_USABLE; 127704f39047SSimon Wunderlich chan->dfs_state_entered = jiffies; 127804f39047SSimon Wunderlich 1279aa3d7eefSRajkumar Manoharan chan->beacon_found = false; 1280038659e7SLuis R. Rodriguez chan->flags = flags | bw_flags | map_regdom_flags(reg_rule->flags); 12811a919318SJohannes Berg chan->max_antenna_gain = 12821a919318SJohannes Berg min_t(int, chan->orig_mag, 12831a919318SJohannes Berg MBI_TO_DBI(power_rule->max_antenna_gain)); 1284eccc068eSHong Wu chan->max_reg_power = (int) MBM_TO_DBM(power_rule->max_eirp); 1285089027e5SJanusz Dziedzic 1286089027e5SJanusz Dziedzic if (chan->flags & IEEE80211_CHAN_RADAR) { 1287089027e5SJanusz Dziedzic if (reg_rule->dfs_cac_ms) 1288089027e5SJanusz Dziedzic chan->dfs_cac_ms = reg_rule->dfs_cac_ms; 1289089027e5SJanusz Dziedzic else 1290089027e5SJanusz Dziedzic chan->dfs_cac_ms = IEEE80211_DFS_MIN_CAC_TIME_MS; 1291089027e5SJanusz Dziedzic } 1292089027e5SJanusz Dziedzic 12935e31fc08SStanislaw Gruszka if (chan->orig_mpwr) { 12945e31fc08SStanislaw Gruszka /* 1295a09a85a0SLuis R. Rodriguez * Devices that use REGULATORY_COUNTRY_IE_FOLLOW_POWER 1296a09a85a0SLuis R. Rodriguez * will always follow the passed country IE power settings. 12975e31fc08SStanislaw Gruszka */ 12985e31fc08SStanislaw Gruszka if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE && 1299a09a85a0SLuis R. Rodriguez wiphy->regulatory_flags & REGULATORY_COUNTRY_IE_FOLLOW_POWER) 13005e31fc08SStanislaw Gruszka chan->max_power = chan->max_reg_power; 13015e31fc08SStanislaw Gruszka else 13025e31fc08SStanislaw Gruszka chan->max_power = min(chan->orig_mpwr, 13035e31fc08SStanislaw Gruszka chan->max_reg_power); 13045e31fc08SStanislaw Gruszka } else 13055e31fc08SStanislaw Gruszka chan->max_power = chan->max_reg_power; 13068318d78aSJohannes Berg } 13078318d78aSJohannes Berg 13087ca43d03SLuis R. Rodriguez static void handle_band(struct wiphy *wiphy, 1309fdc9d7b2SJohannes Berg enum nl80211_reg_initiator initiator, 1310fdc9d7b2SJohannes Berg struct ieee80211_supported_band *sband) 13118318d78aSJohannes Berg { 1312a92a3ce7SLuis R. Rodriguez unsigned int i; 1313a92a3ce7SLuis R. Rodriguez 1314fdc9d7b2SJohannes Berg if (!sband) 1315fdc9d7b2SJohannes Berg return; 13168318d78aSJohannes Berg 13178318d78aSJohannes Berg for (i = 0; i < sband->n_channels; i++) 1318fdc9d7b2SJohannes Berg handle_channel(wiphy, initiator, &sband->channels[i]); 13198318d78aSJohannes Berg } 13208318d78aSJohannes Berg 132157b5ce07SLuis R. Rodriguez static bool reg_request_cell_base(struct regulatory_request *request) 132257b5ce07SLuis R. Rodriguez { 132357b5ce07SLuis R. Rodriguez if (request->initiator != NL80211_REGDOM_SET_BY_USER) 132457b5ce07SLuis R. Rodriguez return false; 13251a919318SJohannes Berg return request->user_reg_hint_type == NL80211_USER_REG_HINT_CELL_BASE; 132657b5ce07SLuis R. Rodriguez } 132757b5ce07SLuis R. Rodriguez 132857b5ce07SLuis R. Rodriguez bool reg_last_request_cell_base(void) 132957b5ce07SLuis R. Rodriguez { 133038fd2143SJohannes Berg return reg_request_cell_base(get_last_request()); 133157b5ce07SLuis R. Rodriguez } 133257b5ce07SLuis R. Rodriguez 133394fc661fSIlan Peer #ifdef CONFIG_CFG80211_REG_CELLULAR_HINTS 133457b5ce07SLuis R. Rodriguez /* Core specific check */ 13352f92212bSJohannes Berg static enum reg_request_treatment 13362f92212bSJohannes Berg reg_ignore_cell_hint(struct regulatory_request *pending_request) 133757b5ce07SLuis R. Rodriguez { 1338c492db37SJohannes Berg struct regulatory_request *lr = get_last_request(); 133957b5ce07SLuis R. Rodriguez 134057b5ce07SLuis R. Rodriguez if (!reg_num_devs_support_basehint) 13412f92212bSJohannes Berg return REG_REQ_IGNORE; 134257b5ce07SLuis R. Rodriguez 1343c492db37SJohannes Berg if (reg_request_cell_base(lr) && 13441a919318SJohannes Berg !regdom_changes(pending_request->alpha2)) 13452f92212bSJohannes Berg return REG_REQ_ALREADY_SET; 13461a919318SJohannes Berg 13472f92212bSJohannes Berg return REG_REQ_OK; 134857b5ce07SLuis R. Rodriguez } 134957b5ce07SLuis R. Rodriguez 135057b5ce07SLuis R. Rodriguez /* Device specific check */ 135157b5ce07SLuis R. Rodriguez static bool reg_dev_ignore_cell_hint(struct wiphy *wiphy) 135257b5ce07SLuis R. Rodriguez { 13531a919318SJohannes Berg return !(wiphy->features & NL80211_FEATURE_CELL_BASE_REG_HINTS); 135457b5ce07SLuis R. Rodriguez } 135557b5ce07SLuis R. Rodriguez #else 1356a515de66SJohannes Berg static enum reg_request_treatment 1357a515de66SJohannes Berg reg_ignore_cell_hint(struct regulatory_request *pending_request) 135857b5ce07SLuis R. Rodriguez { 13592f92212bSJohannes Berg return REG_REQ_IGNORE; 136057b5ce07SLuis R. Rodriguez } 13611a919318SJohannes Berg 13621a919318SJohannes Berg static bool reg_dev_ignore_cell_hint(struct wiphy *wiphy) 136357b5ce07SLuis R. Rodriguez { 136457b5ce07SLuis R. Rodriguez return true; 136557b5ce07SLuis R. Rodriguez } 136657b5ce07SLuis R. Rodriguez #endif 136757b5ce07SLuis R. Rodriguez 1368fa1fb9cbSLuis R. Rodriguez static bool wiphy_strict_alpha2_regd(struct wiphy *wiphy) 1369fa1fb9cbSLuis R. Rodriguez { 1370a2f73b6cSLuis R. Rodriguez if (wiphy->regulatory_flags & REGULATORY_STRICT_REG && 1371a2f73b6cSLuis R. Rodriguez !(wiphy->regulatory_flags & REGULATORY_CUSTOM_REG)) 1372fa1fb9cbSLuis R. Rodriguez return true; 1373fa1fb9cbSLuis R. Rodriguez return false; 1374fa1fb9cbSLuis R. Rodriguez } 137557b5ce07SLuis R. Rodriguez 13767db90f4aSLuis R. Rodriguez static bool ignore_reg_update(struct wiphy *wiphy, 13777db90f4aSLuis R. Rodriguez enum nl80211_reg_initiator initiator) 137814b9815aSLuis R. Rodriguez { 1379c492db37SJohannes Berg struct regulatory_request *lr = get_last_request(); 1380c492db37SJohannes Berg 1381b0d7aa59SJonathan Doron if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) 1382b0d7aa59SJonathan Doron return true; 1383b0d7aa59SJonathan Doron 1384c492db37SJohannes Berg if (!lr) { 1385034c6d6eSLuis R. Rodriguez REG_DBG_PRINT("Ignoring regulatory request set by %s " 1386034c6d6eSLuis R. Rodriguez "since last_request is not set\n", 1387926a0a09SLuis R. Rodriguez reg_initiator_name(initiator)); 138814b9815aSLuis R. Rodriguez return true; 1389926a0a09SLuis R. Rodriguez } 1390926a0a09SLuis R. Rodriguez 13917db90f4aSLuis R. Rodriguez if (initiator == NL80211_REGDOM_SET_BY_CORE && 1392a2f73b6cSLuis R. Rodriguez wiphy->regulatory_flags & REGULATORY_CUSTOM_REG) { 1393034c6d6eSLuis R. Rodriguez REG_DBG_PRINT("Ignoring regulatory request set by %s " 1394034c6d6eSLuis R. Rodriguez "since the driver uses its own custom " 1395034c6d6eSLuis R. Rodriguez "regulatory domain\n", 1396926a0a09SLuis R. Rodriguez reg_initiator_name(initiator)); 139714b9815aSLuis R. Rodriguez return true; 1398926a0a09SLuis R. Rodriguez } 1399926a0a09SLuis R. Rodriguez 1400fb1fc7adSLuis R. Rodriguez /* 1401fb1fc7adSLuis R. Rodriguez * wiphy->regd will be set once the device has its own 1402fb1fc7adSLuis R. Rodriguez * desired regulatory domain set 1403fb1fc7adSLuis R. Rodriguez */ 1404fa1fb9cbSLuis R. Rodriguez if (wiphy_strict_alpha2_regd(wiphy) && !wiphy->regd && 1405749b527bSLuis R. Rodriguez initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && 1406c492db37SJohannes Berg !is_world_regdom(lr->alpha2)) { 1407034c6d6eSLuis R. Rodriguez REG_DBG_PRINT("Ignoring regulatory request set by %s " 1408034c6d6eSLuis R. Rodriguez "since the driver requires its own regulatory " 1409034c6d6eSLuis R. Rodriguez "domain to be set first\n", 1410926a0a09SLuis R. Rodriguez reg_initiator_name(initiator)); 141114b9815aSLuis R. Rodriguez return true; 1412926a0a09SLuis R. Rodriguez } 1413926a0a09SLuis R. Rodriguez 1414c492db37SJohannes Berg if (reg_request_cell_base(lr)) 141557b5ce07SLuis R. Rodriguez return reg_dev_ignore_cell_hint(wiphy); 141657b5ce07SLuis R. Rodriguez 141714b9815aSLuis R. Rodriguez return false; 141814b9815aSLuis R. Rodriguez } 141914b9815aSLuis R. Rodriguez 14203195e489SLuis R. Rodriguez static bool reg_is_world_roaming(struct wiphy *wiphy) 14213195e489SLuis R. Rodriguez { 14223195e489SLuis R. Rodriguez const struct ieee80211_regdomain *cr = get_cfg80211_regdom(); 14233195e489SLuis R. Rodriguez const struct ieee80211_regdomain *wr = get_wiphy_regdom(wiphy); 14243195e489SLuis R. Rodriguez struct regulatory_request *lr = get_last_request(); 14253195e489SLuis R. Rodriguez 14263195e489SLuis R. Rodriguez if (is_world_regdom(cr->alpha2) || (wr && is_world_regdom(wr->alpha2))) 14273195e489SLuis R. Rodriguez return true; 14283195e489SLuis R. Rodriguez 14293195e489SLuis R. Rodriguez if (lr && lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && 1430a2f73b6cSLuis R. Rodriguez wiphy->regulatory_flags & REGULATORY_CUSTOM_REG) 14313195e489SLuis R. Rodriguez return true; 14323195e489SLuis R. Rodriguez 14333195e489SLuis R. Rodriguez return false; 14343195e489SLuis R. Rodriguez } 14353195e489SLuis R. Rodriguez 14361a919318SJohannes Berg static void handle_reg_beacon(struct wiphy *wiphy, unsigned int chan_idx, 1437e38f8a7aSLuis R. Rodriguez struct reg_beacon *reg_beacon) 1438e38f8a7aSLuis R. Rodriguez { 1439e38f8a7aSLuis R. Rodriguez struct ieee80211_supported_band *sband; 1440e38f8a7aSLuis R. Rodriguez struct ieee80211_channel *chan; 14416bad8766SLuis R. Rodriguez bool channel_changed = false; 14426bad8766SLuis R. Rodriguez struct ieee80211_channel chan_before; 1443e38f8a7aSLuis R. Rodriguez 1444e38f8a7aSLuis R. Rodriguez sband = wiphy->bands[reg_beacon->chan.band]; 1445e38f8a7aSLuis R. Rodriguez chan = &sband->channels[chan_idx]; 1446e38f8a7aSLuis R. Rodriguez 1447e38f8a7aSLuis R. Rodriguez if (likely(chan->center_freq != reg_beacon->chan.center_freq)) 1448e38f8a7aSLuis R. Rodriguez return; 1449e38f8a7aSLuis R. Rodriguez 14506bad8766SLuis R. Rodriguez if (chan->beacon_found) 14516bad8766SLuis R. Rodriguez return; 14526bad8766SLuis R. Rodriguez 14536bad8766SLuis R. Rodriguez chan->beacon_found = true; 14546bad8766SLuis R. Rodriguez 14550f500a5fSLuis R. Rodriguez if (!reg_is_world_roaming(wiphy)) 14560f500a5fSLuis R. Rodriguez return; 14570f500a5fSLuis R. Rodriguez 1458a2f73b6cSLuis R. Rodriguez if (wiphy->regulatory_flags & REGULATORY_DISABLE_BEACON_HINTS) 145937184244SLuis R. Rodriguez return; 146037184244SLuis R. Rodriguez 14616bad8766SLuis R. Rodriguez chan_before.center_freq = chan->center_freq; 14626bad8766SLuis R. Rodriguez chan_before.flags = chan->flags; 14636bad8766SLuis R. Rodriguez 14648fe02e16SLuis R. Rodriguez if (chan->flags & IEEE80211_CHAN_NO_IR) { 14658fe02e16SLuis R. Rodriguez chan->flags &= ~IEEE80211_CHAN_NO_IR; 14666bad8766SLuis R. Rodriguez channel_changed = true; 1467e38f8a7aSLuis R. Rodriguez } 1468e38f8a7aSLuis R. Rodriguez 14696bad8766SLuis R. Rodriguez if (channel_changed) 14706bad8766SLuis R. Rodriguez nl80211_send_beacon_hint_event(wiphy, &chan_before, chan); 1471e38f8a7aSLuis R. Rodriguez } 1472e38f8a7aSLuis R. Rodriguez 1473e38f8a7aSLuis R. Rodriguez /* 1474e38f8a7aSLuis R. Rodriguez * Called when a scan on a wiphy finds a beacon on 1475e38f8a7aSLuis R. Rodriguez * new channel 1476e38f8a7aSLuis R. Rodriguez */ 1477e38f8a7aSLuis R. Rodriguez static void wiphy_update_new_beacon(struct wiphy *wiphy, 1478e38f8a7aSLuis R. Rodriguez struct reg_beacon *reg_beacon) 1479e38f8a7aSLuis R. Rodriguez { 1480e38f8a7aSLuis R. Rodriguez unsigned int i; 1481e38f8a7aSLuis R. Rodriguez struct ieee80211_supported_band *sband; 1482e38f8a7aSLuis R. Rodriguez 1483e38f8a7aSLuis R. Rodriguez if (!wiphy->bands[reg_beacon->chan.band]) 1484e38f8a7aSLuis R. Rodriguez return; 1485e38f8a7aSLuis R. Rodriguez 1486e38f8a7aSLuis R. Rodriguez sband = wiphy->bands[reg_beacon->chan.band]; 1487e38f8a7aSLuis R. Rodriguez 1488e38f8a7aSLuis R. Rodriguez for (i = 0; i < sband->n_channels; i++) 1489e38f8a7aSLuis R. Rodriguez handle_reg_beacon(wiphy, i, reg_beacon); 1490e38f8a7aSLuis R. Rodriguez } 1491e38f8a7aSLuis R. Rodriguez 1492e38f8a7aSLuis R. Rodriguez /* 1493e38f8a7aSLuis R. Rodriguez * Called upon reg changes or a new wiphy is added 1494e38f8a7aSLuis R. Rodriguez */ 1495e38f8a7aSLuis R. Rodriguez static void wiphy_update_beacon_reg(struct wiphy *wiphy) 1496e38f8a7aSLuis R. Rodriguez { 1497e38f8a7aSLuis R. Rodriguez unsigned int i; 1498e38f8a7aSLuis R. Rodriguez struct ieee80211_supported_band *sband; 1499e38f8a7aSLuis R. Rodriguez struct reg_beacon *reg_beacon; 1500e38f8a7aSLuis R. Rodriguez 1501e38f8a7aSLuis R. Rodriguez list_for_each_entry(reg_beacon, ®_beacon_list, list) { 1502e38f8a7aSLuis R. Rodriguez if (!wiphy->bands[reg_beacon->chan.band]) 1503e38f8a7aSLuis R. Rodriguez continue; 1504e38f8a7aSLuis R. Rodriguez sband = wiphy->bands[reg_beacon->chan.band]; 1505e38f8a7aSLuis R. Rodriguez for (i = 0; i < sband->n_channels; i++) 1506e38f8a7aSLuis R. Rodriguez handle_reg_beacon(wiphy, i, reg_beacon); 1507e38f8a7aSLuis R. Rodriguez } 1508e38f8a7aSLuis R. Rodriguez } 1509e38f8a7aSLuis R. Rodriguez 1510e38f8a7aSLuis R. Rodriguez /* Reap the advantages of previously found beacons */ 1511e38f8a7aSLuis R. Rodriguez static void reg_process_beacons(struct wiphy *wiphy) 1512e38f8a7aSLuis R. Rodriguez { 1513b1ed8dddSLuis R. Rodriguez /* 1514b1ed8dddSLuis R. Rodriguez * Means we are just firing up cfg80211, so no beacons would 1515b1ed8dddSLuis R. Rodriguez * have been processed yet. 1516b1ed8dddSLuis R. Rodriguez */ 1517b1ed8dddSLuis R. Rodriguez if (!last_request) 1518b1ed8dddSLuis R. Rodriguez return; 1519e38f8a7aSLuis R. Rodriguez wiphy_update_beacon_reg(wiphy); 1520e38f8a7aSLuis R. Rodriguez } 1521e38f8a7aSLuis R. Rodriguez 15221a919318SJohannes Berg static bool is_ht40_allowed(struct ieee80211_channel *chan) 1523038659e7SLuis R. Rodriguez { 1524038659e7SLuis R. Rodriguez if (!chan) 1525038659e7SLuis R. Rodriguez return false; 15261a919318SJohannes Berg if (chan->flags & IEEE80211_CHAN_DISABLED) 15271a919318SJohannes Berg return false; 15281a919318SJohannes Berg /* This would happen when regulatory rules disallow HT40 completely */ 152955b183adSFelix Fietkau if ((chan->flags & IEEE80211_CHAN_NO_HT40) == IEEE80211_CHAN_NO_HT40) 153055b183adSFelix Fietkau return false; 153155b183adSFelix Fietkau return true; 1532038659e7SLuis R. Rodriguez } 1533038659e7SLuis R. Rodriguez 1534038659e7SLuis R. Rodriguez static void reg_process_ht_flags_channel(struct wiphy *wiphy, 1535fdc9d7b2SJohannes Berg struct ieee80211_channel *channel) 1536038659e7SLuis R. Rodriguez { 1537fdc9d7b2SJohannes Berg struct ieee80211_supported_band *sband = wiphy->bands[channel->band]; 1538038659e7SLuis R. Rodriguez struct ieee80211_channel *channel_before = NULL, *channel_after = NULL; 1539038659e7SLuis R. Rodriguez unsigned int i; 1540038659e7SLuis R. Rodriguez 15411a919318SJohannes Berg if (!is_ht40_allowed(channel)) { 1542038659e7SLuis R. Rodriguez channel->flags |= IEEE80211_CHAN_NO_HT40; 1543038659e7SLuis R. Rodriguez return; 1544038659e7SLuis R. Rodriguez } 1545038659e7SLuis R. Rodriguez 1546038659e7SLuis R. Rodriguez /* 1547038659e7SLuis R. Rodriguez * We need to ensure the extension channels exist to 1548038659e7SLuis R. Rodriguez * be able to use HT40- or HT40+, this finds them (or not) 1549038659e7SLuis R. Rodriguez */ 1550038659e7SLuis R. Rodriguez for (i = 0; i < sband->n_channels; i++) { 1551038659e7SLuis R. Rodriguez struct ieee80211_channel *c = &sband->channels[i]; 15521a919318SJohannes Berg 1553038659e7SLuis R. Rodriguez if (c->center_freq == (channel->center_freq - 20)) 1554038659e7SLuis R. Rodriguez channel_before = c; 1555038659e7SLuis R. Rodriguez if (c->center_freq == (channel->center_freq + 20)) 1556038659e7SLuis R. Rodriguez channel_after = c; 1557038659e7SLuis R. Rodriguez } 1558038659e7SLuis R. Rodriguez 1559038659e7SLuis R. Rodriguez /* 1560038659e7SLuis R. Rodriguez * Please note that this assumes target bandwidth is 20 MHz, 1561038659e7SLuis R. Rodriguez * if that ever changes we also need to change the below logic 1562038659e7SLuis R. Rodriguez * to include that as well. 1563038659e7SLuis R. Rodriguez */ 15641a919318SJohannes Berg if (!is_ht40_allowed(channel_before)) 1565689da1b3SLuis R. Rodriguez channel->flags |= IEEE80211_CHAN_NO_HT40MINUS; 1566038659e7SLuis R. Rodriguez else 1567689da1b3SLuis R. Rodriguez channel->flags &= ~IEEE80211_CHAN_NO_HT40MINUS; 1568038659e7SLuis R. Rodriguez 15691a919318SJohannes Berg if (!is_ht40_allowed(channel_after)) 1570689da1b3SLuis R. Rodriguez channel->flags |= IEEE80211_CHAN_NO_HT40PLUS; 1571038659e7SLuis R. Rodriguez else 1572689da1b3SLuis R. Rodriguez channel->flags &= ~IEEE80211_CHAN_NO_HT40PLUS; 1573038659e7SLuis R. Rodriguez } 1574038659e7SLuis R. Rodriguez 1575038659e7SLuis R. Rodriguez static void reg_process_ht_flags_band(struct wiphy *wiphy, 1576fdc9d7b2SJohannes Berg struct ieee80211_supported_band *sband) 1577038659e7SLuis R. Rodriguez { 1578038659e7SLuis R. Rodriguez unsigned int i; 1579038659e7SLuis R. Rodriguez 1580fdc9d7b2SJohannes Berg if (!sband) 1581fdc9d7b2SJohannes Berg return; 1582038659e7SLuis R. Rodriguez 1583038659e7SLuis R. Rodriguez for (i = 0; i < sband->n_channels; i++) 1584fdc9d7b2SJohannes Berg reg_process_ht_flags_channel(wiphy, &sband->channels[i]); 1585038659e7SLuis R. Rodriguez } 1586038659e7SLuis R. Rodriguez 1587038659e7SLuis R. Rodriguez static void reg_process_ht_flags(struct wiphy *wiphy) 1588038659e7SLuis R. Rodriguez { 1589038659e7SLuis R. Rodriguez enum ieee80211_band band; 1590038659e7SLuis R. Rodriguez 1591038659e7SLuis R. Rodriguez if (!wiphy) 1592038659e7SLuis R. Rodriguez return; 1593038659e7SLuis R. Rodriguez 1594fdc9d7b2SJohannes Berg for (band = 0; band < IEEE80211_NUM_BANDS; band++) 1595fdc9d7b2SJohannes Berg reg_process_ht_flags_band(wiphy, wiphy->bands[band]); 1596038659e7SLuis R. Rodriguez } 1597038659e7SLuis R. Rodriguez 15980e3802dbSLuis R. Rodriguez static void reg_call_notifier(struct wiphy *wiphy, 15990e3802dbSLuis R. Rodriguez struct regulatory_request *request) 16000e3802dbSLuis R. Rodriguez { 16010e3802dbSLuis R. Rodriguez if (wiphy->reg_notifier) 16020e3802dbSLuis R. Rodriguez wiphy->reg_notifier(wiphy, request); 16030e3802dbSLuis R. Rodriguez } 16040e3802dbSLuis R. Rodriguez 1605ad932f04SArik Nemtsov static bool reg_wdev_chan_valid(struct wiphy *wiphy, struct wireless_dev *wdev) 1606ad932f04SArik Nemtsov { 1607ad932f04SArik Nemtsov struct cfg80211_chan_def chandef; 1608ad932f04SArik Nemtsov struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); 160920658702SArik Nemtsov enum nl80211_iftype iftype; 1610ad932f04SArik Nemtsov 1611ad932f04SArik Nemtsov wdev_lock(wdev); 161220658702SArik Nemtsov iftype = wdev->iftype; 1613ad932f04SArik Nemtsov 161420658702SArik Nemtsov /* make sure the interface is active */ 1615ad932f04SArik Nemtsov if (!wdev->netdev || !netif_running(wdev->netdev)) 161620658702SArik Nemtsov goto wdev_inactive_unlock; 1617ad932f04SArik Nemtsov 161820658702SArik Nemtsov switch (iftype) { 1619ad932f04SArik Nemtsov case NL80211_IFTYPE_AP: 1620ad932f04SArik Nemtsov case NL80211_IFTYPE_P2P_GO: 1621ad932f04SArik Nemtsov if (!wdev->beacon_interval) 162220658702SArik Nemtsov goto wdev_inactive_unlock; 162320658702SArik Nemtsov chandef = wdev->chandef; 1624ad932f04SArik Nemtsov break; 1625185076d6SArik Nemtsov case NL80211_IFTYPE_ADHOC: 1626185076d6SArik Nemtsov if (!wdev->ssid_len) 162720658702SArik Nemtsov goto wdev_inactive_unlock; 162820658702SArik Nemtsov chandef = wdev->chandef; 1629185076d6SArik Nemtsov break; 1630ad932f04SArik Nemtsov case NL80211_IFTYPE_STATION: 1631ad932f04SArik Nemtsov case NL80211_IFTYPE_P2P_CLIENT: 1632ad932f04SArik Nemtsov if (!wdev->current_bss || 1633ad932f04SArik Nemtsov !wdev->current_bss->pub.channel) 163420658702SArik Nemtsov goto wdev_inactive_unlock; 1635ad932f04SArik Nemtsov 163620658702SArik Nemtsov if (!rdev->ops->get_channel || 163720658702SArik Nemtsov rdev_get_channel(rdev, wdev, &chandef)) 163820658702SArik Nemtsov cfg80211_chandef_create(&chandef, 163920658702SArik Nemtsov wdev->current_bss->pub.channel, 164020658702SArik Nemtsov NL80211_CHAN_NO_HT); 1641ad932f04SArik Nemtsov break; 1642ad932f04SArik Nemtsov case NL80211_IFTYPE_MONITOR: 1643ad932f04SArik Nemtsov case NL80211_IFTYPE_AP_VLAN: 1644ad932f04SArik Nemtsov case NL80211_IFTYPE_P2P_DEVICE: 1645ad932f04SArik Nemtsov /* no enforcement required */ 1646ad932f04SArik Nemtsov break; 1647ad932f04SArik Nemtsov default: 1648ad932f04SArik Nemtsov /* others not implemented for now */ 1649ad932f04SArik Nemtsov WARN_ON(1); 1650ad932f04SArik Nemtsov break; 1651ad932f04SArik Nemtsov } 1652ad932f04SArik Nemtsov 1653ad932f04SArik Nemtsov wdev_unlock(wdev); 165420658702SArik Nemtsov 165520658702SArik Nemtsov switch (iftype) { 165620658702SArik Nemtsov case NL80211_IFTYPE_AP: 165720658702SArik Nemtsov case NL80211_IFTYPE_P2P_GO: 165820658702SArik Nemtsov case NL80211_IFTYPE_ADHOC: 1659923b352fSArik Nemtsov return cfg80211_reg_can_beacon_relax(wiphy, &chandef, iftype); 166020658702SArik Nemtsov case NL80211_IFTYPE_STATION: 166120658702SArik Nemtsov case NL80211_IFTYPE_P2P_CLIENT: 166220658702SArik Nemtsov return cfg80211_chandef_usable(wiphy, &chandef, 166320658702SArik Nemtsov IEEE80211_CHAN_DISABLED); 166420658702SArik Nemtsov default: 166520658702SArik Nemtsov break; 166620658702SArik Nemtsov } 166720658702SArik Nemtsov 166820658702SArik Nemtsov return true; 166920658702SArik Nemtsov 167020658702SArik Nemtsov wdev_inactive_unlock: 167120658702SArik Nemtsov wdev_unlock(wdev); 167220658702SArik Nemtsov return true; 1673ad932f04SArik Nemtsov } 1674ad932f04SArik Nemtsov 1675ad932f04SArik Nemtsov static void reg_leave_invalid_chans(struct wiphy *wiphy) 1676ad932f04SArik Nemtsov { 1677ad932f04SArik Nemtsov struct wireless_dev *wdev; 1678ad932f04SArik Nemtsov struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); 1679ad932f04SArik Nemtsov 1680ad932f04SArik Nemtsov ASSERT_RTNL(); 1681ad932f04SArik Nemtsov 1682ad932f04SArik Nemtsov list_for_each_entry(wdev, &rdev->wdev_list, list) 1683ad932f04SArik Nemtsov if (!reg_wdev_chan_valid(wiphy, wdev)) 1684ad932f04SArik Nemtsov cfg80211_leave(rdev, wdev); 1685ad932f04SArik Nemtsov } 1686ad932f04SArik Nemtsov 1687ad932f04SArik Nemtsov static void reg_check_chans_work(struct work_struct *work) 1688ad932f04SArik Nemtsov { 1689ad932f04SArik Nemtsov struct cfg80211_registered_device *rdev; 1690ad932f04SArik Nemtsov 1691ad932f04SArik Nemtsov REG_DBG_PRINT("Verifying active interfaces after reg change\n"); 1692ad932f04SArik Nemtsov rtnl_lock(); 1693ad932f04SArik Nemtsov 1694ad932f04SArik Nemtsov list_for_each_entry(rdev, &cfg80211_rdev_list, list) 1695ad932f04SArik Nemtsov if (!(rdev->wiphy.regulatory_flags & 1696ad932f04SArik Nemtsov REGULATORY_IGNORE_STALE_KICKOFF)) 1697ad932f04SArik Nemtsov reg_leave_invalid_chans(&rdev->wiphy); 1698ad932f04SArik Nemtsov 1699ad932f04SArik Nemtsov rtnl_unlock(); 1700ad932f04SArik Nemtsov } 1701ad932f04SArik Nemtsov 1702ad932f04SArik Nemtsov static void reg_check_channels(void) 1703ad932f04SArik Nemtsov { 1704ad932f04SArik Nemtsov /* 1705ad932f04SArik Nemtsov * Give usermode a chance to do something nicer (move to another 1706ad932f04SArik Nemtsov * channel, orderly disconnection), before forcing a disconnection. 1707ad932f04SArik Nemtsov */ 1708ad932f04SArik Nemtsov mod_delayed_work(system_power_efficient_wq, 1709ad932f04SArik Nemtsov ®_check_chans, 1710ad932f04SArik Nemtsov msecs_to_jiffies(REG_ENFORCE_GRACE_MS)); 1711ad932f04SArik Nemtsov } 1712ad932f04SArik Nemtsov 1713eac03e38SSven Neumann static void wiphy_update_regulatory(struct wiphy *wiphy, 17147db90f4aSLuis R. Rodriguez enum nl80211_reg_initiator initiator) 17158318d78aSJohannes Berg { 17168318d78aSJohannes Berg enum ieee80211_band band; 1717c492db37SJohannes Berg struct regulatory_request *lr = get_last_request(); 1718eac03e38SSven Neumann 17190e3802dbSLuis R. Rodriguez if (ignore_reg_update(wiphy, initiator)) { 17200e3802dbSLuis R. Rodriguez /* 17210e3802dbSLuis R. Rodriguez * Regulatory updates set by CORE are ignored for custom 17220e3802dbSLuis R. Rodriguez * regulatory cards. Let us notify the changes to the driver, 17230e3802dbSLuis R. Rodriguez * as some drivers used this to restore its orig_* reg domain. 17240e3802dbSLuis R. Rodriguez */ 17250e3802dbSLuis R. Rodriguez if (initiator == NL80211_REGDOM_SET_BY_CORE && 1726a2f73b6cSLuis R. Rodriguez wiphy->regulatory_flags & REGULATORY_CUSTOM_REG) 17270e3802dbSLuis R. Rodriguez reg_call_notifier(wiphy, lr); 1728a203c2aaSSven Neumann return; 17290e3802dbSLuis R. Rodriguez } 1730a203c2aaSSven Neumann 1731c492db37SJohannes Berg lr->dfs_region = get_cfg80211_regdom()->dfs_region; 1732b68e6b3bSLuis R. Rodriguez 1733fdc9d7b2SJohannes Berg for (band = 0; band < IEEE80211_NUM_BANDS; band++) 1734fdc9d7b2SJohannes Berg handle_band(wiphy, initiator, wiphy->bands[band]); 1735a203c2aaSSven Neumann 1736e38f8a7aSLuis R. Rodriguez reg_process_beacons(wiphy); 1737038659e7SLuis R. Rodriguez reg_process_ht_flags(wiphy); 17380e3802dbSLuis R. Rodriguez reg_call_notifier(wiphy, lr); 1739b2e1b302SLuis R. Rodriguez } 1740b2e1b302SLuis R. Rodriguez 1741d7549cbbSSven Neumann static void update_all_wiphy_regulatory(enum nl80211_reg_initiator initiator) 1742d7549cbbSSven Neumann { 1743d7549cbbSSven Neumann struct cfg80211_registered_device *rdev; 17444a38994fSRajkumar Manoharan struct wiphy *wiphy; 1745d7549cbbSSven Neumann 17465fe231e8SJohannes Berg ASSERT_RTNL(); 1747458f4f9eSJohannes Berg 17484a38994fSRajkumar Manoharan list_for_each_entry(rdev, &cfg80211_rdev_list, list) { 17494a38994fSRajkumar Manoharan wiphy = &rdev->wiphy; 17504a38994fSRajkumar Manoharan wiphy_update_regulatory(wiphy, initiator); 17514a38994fSRajkumar Manoharan } 1752ad932f04SArik Nemtsov 1753ad932f04SArik Nemtsov reg_check_channels(); 1754d7549cbbSSven Neumann } 1755d7549cbbSSven Neumann 17561fa25e41SLuis R. Rodriguez static void handle_channel_custom(struct wiphy *wiphy, 1757fdc9d7b2SJohannes Berg struct ieee80211_channel *chan, 17581fa25e41SLuis R. Rodriguez const struct ieee80211_regdomain *regd) 17591fa25e41SLuis R. Rodriguez { 1760038659e7SLuis R. Rodriguez u32 bw_flags = 0; 17611fa25e41SLuis R. Rodriguez const struct ieee80211_reg_rule *reg_rule = NULL; 17621fa25e41SLuis R. Rodriguez const struct ieee80211_power_rule *power_rule = NULL; 1763038659e7SLuis R. Rodriguez const struct ieee80211_freq_range *freq_range = NULL; 176497524820SJanusz Dziedzic u32 max_bandwidth_khz; 17654edd5698SMatthias May u32 bw; 17661fa25e41SLuis R. Rodriguez 17674edd5698SMatthias May for (bw = MHZ_TO_KHZ(20); bw >= MHZ_TO_KHZ(5); bw = bw / 2) { 176849172874SMichal Sojka reg_rule = freq_reg_info_regd(MHZ_TO_KHZ(chan->center_freq), 17694edd5698SMatthias May regd, bw); 17704edd5698SMatthias May if (!IS_ERR(reg_rule)) 17714edd5698SMatthias May break; 17724edd5698SMatthias May } 17731fa25e41SLuis R. Rodriguez 1774361c9c8bSJohannes Berg if (IS_ERR(reg_rule)) { 1775fe7ef5e9SJohannes Berg REG_DBG_PRINT("Disabling freq %d MHz as custom regd has no rule that fits it\n", 1776fe7ef5e9SJohannes Berg chan->center_freq); 1777db8dfee5SArik Nemtsov if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) { 1778db8dfee5SArik Nemtsov chan->flags |= IEEE80211_CHAN_DISABLED; 1779db8dfee5SArik Nemtsov } else { 1780cc493e4fSLuis R. Rodriguez chan->orig_flags |= IEEE80211_CHAN_DISABLED; 1781cc493e4fSLuis R. Rodriguez chan->flags = chan->orig_flags; 1782db8dfee5SArik Nemtsov } 17831fa25e41SLuis R. Rodriguez return; 17841fa25e41SLuis R. Rodriguez } 17851fa25e41SLuis R. Rodriguez 1786b0dfd2eaSJanusz Dziedzic chan_reg_rule_print_dbg(regd, chan, reg_rule); 1787e702d3cfSLuis R. Rodriguez 17881fa25e41SLuis R. Rodriguez power_rule = ®_rule->power_rule; 1789038659e7SLuis R. Rodriguez freq_range = ®_rule->freq_range; 17901fa25e41SLuis R. Rodriguez 179197524820SJanusz Dziedzic max_bandwidth_khz = freq_range->max_bandwidth_khz; 179297524820SJanusz Dziedzic /* Check if auto calculation requested */ 1793b0dfd2eaSJanusz Dziedzic if (reg_rule->flags & NL80211_RRF_AUTO_BW) 179497524820SJanusz Dziedzic max_bandwidth_khz = reg_get_max_bandwidth(regd, reg_rule); 179597524820SJanusz Dziedzic 17964edd5698SMatthias May /* If we get a reg_rule we can assume that at least 5Mhz fit */ 17974edd5698SMatthias May if (!reg_does_bw_fit(freq_range, MHZ_TO_KHZ(chan->center_freq), 17984edd5698SMatthias May MHZ_TO_KHZ(10))) 17994edd5698SMatthias May bw_flags |= IEEE80211_CHAN_NO_10MHZ; 18004edd5698SMatthias May if (!reg_does_bw_fit(freq_range, MHZ_TO_KHZ(chan->center_freq), 18014edd5698SMatthias May MHZ_TO_KHZ(20))) 18024edd5698SMatthias May bw_flags |= IEEE80211_CHAN_NO_20MHZ; 18034edd5698SMatthias May 18044edd5698SMatthias May if (max_bandwidth_khz < MHZ_TO_KHZ(10)) 18054edd5698SMatthias May bw_flags |= IEEE80211_CHAN_NO_10MHZ; 18064edd5698SMatthias May if (max_bandwidth_khz < MHZ_TO_KHZ(20)) 18074edd5698SMatthias May bw_flags |= IEEE80211_CHAN_NO_20MHZ; 180897524820SJanusz Dziedzic if (max_bandwidth_khz < MHZ_TO_KHZ(40)) 18094edd5698SMatthias May bw_flags |= IEEE80211_CHAN_NO_HT40; 181097524820SJanusz Dziedzic if (max_bandwidth_khz < MHZ_TO_KHZ(80)) 1811c7a6ee27SJohannes Berg bw_flags |= IEEE80211_CHAN_NO_80MHZ; 181297524820SJanusz Dziedzic if (max_bandwidth_khz < MHZ_TO_KHZ(160)) 1813c7a6ee27SJohannes Berg bw_flags |= IEEE80211_CHAN_NO_160MHZ; 1814038659e7SLuis R. Rodriguez 18152e18b38fSArik Nemtsov chan->dfs_state_entered = jiffies; 1816c7ab5081SArik Nemtsov chan->dfs_state = NL80211_DFS_USABLE; 1817c7ab5081SArik Nemtsov 1818c7ab5081SArik Nemtsov chan->beacon_found = false; 1819db8dfee5SArik Nemtsov 1820db8dfee5SArik Nemtsov if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) 1821db8dfee5SArik Nemtsov chan->flags = chan->orig_flags | bw_flags | 1822db8dfee5SArik Nemtsov map_regdom_flags(reg_rule->flags); 1823db8dfee5SArik Nemtsov else 1824038659e7SLuis R. Rodriguez chan->flags |= map_regdom_flags(reg_rule->flags) | bw_flags; 1825db8dfee5SArik Nemtsov 18261fa25e41SLuis R. Rodriguez chan->max_antenna_gain = (int) MBI_TO_DBI(power_rule->max_antenna_gain); 1827279f0f55SFelix Fietkau chan->max_reg_power = chan->max_power = 1828279f0f55SFelix Fietkau (int) MBM_TO_DBM(power_rule->max_eirp); 18292e18b38fSArik Nemtsov 18302e18b38fSArik Nemtsov if (chan->flags & IEEE80211_CHAN_RADAR) { 18312e18b38fSArik Nemtsov if (reg_rule->dfs_cac_ms) 18322e18b38fSArik Nemtsov chan->dfs_cac_ms = reg_rule->dfs_cac_ms; 18332e18b38fSArik Nemtsov else 18342e18b38fSArik Nemtsov chan->dfs_cac_ms = IEEE80211_DFS_MIN_CAC_TIME_MS; 18352e18b38fSArik Nemtsov } 18362e18b38fSArik Nemtsov 18372e18b38fSArik Nemtsov chan->max_power = chan->max_reg_power; 18381fa25e41SLuis R. Rodriguez } 18391fa25e41SLuis R. Rodriguez 1840fdc9d7b2SJohannes Berg static void handle_band_custom(struct wiphy *wiphy, 1841fdc9d7b2SJohannes Berg struct ieee80211_supported_band *sband, 18421fa25e41SLuis R. Rodriguez const struct ieee80211_regdomain *regd) 18431fa25e41SLuis R. Rodriguez { 18441fa25e41SLuis R. Rodriguez unsigned int i; 18451fa25e41SLuis R. Rodriguez 1846fdc9d7b2SJohannes Berg if (!sband) 1847fdc9d7b2SJohannes Berg return; 18481fa25e41SLuis R. Rodriguez 18491fa25e41SLuis R. Rodriguez for (i = 0; i < sband->n_channels; i++) 1850fdc9d7b2SJohannes Berg handle_channel_custom(wiphy, &sband->channels[i], regd); 18511fa25e41SLuis R. Rodriguez } 18521fa25e41SLuis R. Rodriguez 18531fa25e41SLuis R. Rodriguez /* Used by drivers prior to wiphy registration */ 18541fa25e41SLuis R. Rodriguez void wiphy_apply_custom_regulatory(struct wiphy *wiphy, 18551fa25e41SLuis R. Rodriguez const struct ieee80211_regdomain *regd) 18561fa25e41SLuis R. Rodriguez { 18571fa25e41SLuis R. Rodriguez enum ieee80211_band band; 1858bbcf3f02SLuis R. Rodriguez unsigned int bands_set = 0; 1859ac46d48eSLuis R. Rodriguez 1860a2f73b6cSLuis R. Rodriguez WARN(!(wiphy->regulatory_flags & REGULATORY_CUSTOM_REG), 1861a2f73b6cSLuis R. Rodriguez "wiphy should have REGULATORY_CUSTOM_REG\n"); 1862a2f73b6cSLuis R. Rodriguez wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG; 1863222ea581SLuis R. Rodriguez 18641fa25e41SLuis R. Rodriguez for (band = 0; band < IEEE80211_NUM_BANDS; band++) { 1865bbcf3f02SLuis R. Rodriguez if (!wiphy->bands[band]) 1866bbcf3f02SLuis R. Rodriguez continue; 1867fdc9d7b2SJohannes Berg handle_band_custom(wiphy, wiphy->bands[band], regd); 1868bbcf3f02SLuis R. Rodriguez bands_set++; 18691fa25e41SLuis R. Rodriguez } 1870bbcf3f02SLuis R. Rodriguez 1871bbcf3f02SLuis R. Rodriguez /* 1872bbcf3f02SLuis R. Rodriguez * no point in calling this if it won't have any effect 18731a919318SJohannes Berg * on your device's supported bands. 1874bbcf3f02SLuis R. Rodriguez */ 1875bbcf3f02SLuis R. Rodriguez WARN_ON(!bands_set); 18761fa25e41SLuis R. Rodriguez } 18771fa25e41SLuis R. Rodriguez EXPORT_SYMBOL(wiphy_apply_custom_regulatory); 18781fa25e41SLuis R. Rodriguez 1879b2e253cfSLuis R. Rodriguez static void reg_set_request_processed(void) 1880b2e253cfSLuis R. Rodriguez { 1881b2e253cfSLuis R. Rodriguez bool need_more_processing = false; 1882c492db37SJohannes Berg struct regulatory_request *lr = get_last_request(); 1883b2e253cfSLuis R. Rodriguez 1884c492db37SJohannes Berg lr->processed = true; 1885b2e253cfSLuis R. Rodriguez 1886b2e253cfSLuis R. Rodriguez spin_lock(®_requests_lock); 1887b2e253cfSLuis R. Rodriguez if (!list_empty(®_requests_list)) 1888b2e253cfSLuis R. Rodriguez need_more_processing = true; 1889b2e253cfSLuis R. Rodriguez spin_unlock(®_requests_lock); 1890b2e253cfSLuis R. Rodriguez 1891b6863036SJohannes Berg cancel_crda_timeout(); 1892a90c7a31SLuis R. Rodriguez 1893b2e253cfSLuis R. Rodriguez if (need_more_processing) 1894b2e253cfSLuis R. Rodriguez schedule_work(®_work); 1895b2e253cfSLuis R. Rodriguez } 1896b2e253cfSLuis R. Rodriguez 1897d1c96a9aSLuis R. Rodriguez /** 1898b3eb7f3fSLuis R. Rodriguez * reg_process_hint_core - process core regulatory requests 1899b3eb7f3fSLuis R. Rodriguez * @pending_request: a pending core regulatory request 1900b3eb7f3fSLuis R. Rodriguez * 1901b3eb7f3fSLuis R. Rodriguez * The wireless subsystem can use this function to process 1902b3eb7f3fSLuis R. Rodriguez * a regulatory request issued by the regulatory core. 1903b3eb7f3fSLuis R. Rodriguez */ 1904d34265a3SJohannes Berg static enum reg_request_treatment 1905d34265a3SJohannes Berg reg_process_hint_core(struct regulatory_request *core_request) 1906b3eb7f3fSLuis R. Rodriguez { 1907cecbb069SJohannes Berg if (reg_query_database(core_request)) { 1908b3eb7f3fSLuis R. Rodriguez core_request->intersect = false; 1909b3eb7f3fSLuis R. Rodriguez core_request->processed = false; 191005f1a3eaSLuis R. Rodriguez reg_update_last_request(core_request); 1911d34265a3SJohannes Berg return REG_REQ_OK; 191225b20dbdSJohannes Berg } 1913d34265a3SJohannes Berg 1914d34265a3SJohannes Berg return REG_REQ_IGNORE; 1915b3eb7f3fSLuis R. Rodriguez } 1916b3eb7f3fSLuis R. Rodriguez 19170d97a619SLuis R. Rodriguez static enum reg_request_treatment 19180d97a619SLuis R. Rodriguez __reg_process_hint_user(struct regulatory_request *user_request) 19190d97a619SLuis R. Rodriguez { 19200d97a619SLuis R. Rodriguez struct regulatory_request *lr = get_last_request(); 19210d97a619SLuis R. Rodriguez 19220d97a619SLuis R. Rodriguez if (reg_request_cell_base(user_request)) 19230d97a619SLuis R. Rodriguez return reg_ignore_cell_hint(user_request); 19240d97a619SLuis R. Rodriguez 19250d97a619SLuis R. Rodriguez if (reg_request_cell_base(lr)) 19260d97a619SLuis R. Rodriguez return REG_REQ_IGNORE; 19270d97a619SLuis R. Rodriguez 19280d97a619SLuis R. Rodriguez if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) 19290d97a619SLuis R. Rodriguez return REG_REQ_INTERSECT; 19300d97a619SLuis R. Rodriguez /* 19310d97a619SLuis R. Rodriguez * If the user knows better the user should set the regdom 19320d97a619SLuis R. Rodriguez * to their country before the IE is picked up 19330d97a619SLuis R. Rodriguez */ 19340d97a619SLuis R. Rodriguez if (lr->initiator == NL80211_REGDOM_SET_BY_USER && 19350d97a619SLuis R. Rodriguez lr->intersect) 19360d97a619SLuis R. Rodriguez return REG_REQ_IGNORE; 19370d97a619SLuis R. Rodriguez /* 19380d97a619SLuis R. Rodriguez * Process user requests only after previous user/driver/core 19390d97a619SLuis R. Rodriguez * requests have been processed 19400d97a619SLuis R. Rodriguez */ 19410d97a619SLuis R. Rodriguez if ((lr->initiator == NL80211_REGDOM_SET_BY_CORE || 19420d97a619SLuis R. Rodriguez lr->initiator == NL80211_REGDOM_SET_BY_DRIVER || 19430d97a619SLuis R. Rodriguez lr->initiator == NL80211_REGDOM_SET_BY_USER) && 19440d97a619SLuis R. Rodriguez regdom_changes(lr->alpha2)) 19450d97a619SLuis R. Rodriguez return REG_REQ_IGNORE; 19460d97a619SLuis R. Rodriguez 19470d97a619SLuis R. Rodriguez if (!regdom_changes(user_request->alpha2)) 19480d97a619SLuis R. Rodriguez return REG_REQ_ALREADY_SET; 19490d97a619SLuis R. Rodriguez 19500d97a619SLuis R. Rodriguez return REG_REQ_OK; 19510d97a619SLuis R. Rodriguez } 19520d97a619SLuis R. Rodriguez 19530d97a619SLuis R. Rodriguez /** 19540d97a619SLuis R. Rodriguez * reg_process_hint_user - process user regulatory requests 19550d97a619SLuis R. Rodriguez * @user_request: a pending user regulatory request 19560d97a619SLuis R. Rodriguez * 19570d97a619SLuis R. Rodriguez * The wireless subsystem can use this function to process 19580d97a619SLuis R. Rodriguez * a regulatory request initiated by userspace. 19590d97a619SLuis R. Rodriguez */ 1960d34265a3SJohannes Berg static enum reg_request_treatment 1961d34265a3SJohannes Berg reg_process_hint_user(struct regulatory_request *user_request) 19620d97a619SLuis R. Rodriguez { 19630d97a619SLuis R. Rodriguez enum reg_request_treatment treatment; 19640d97a619SLuis R. Rodriguez 19650d97a619SLuis R. Rodriguez treatment = __reg_process_hint_user(user_request); 19660d97a619SLuis R. Rodriguez if (treatment == REG_REQ_IGNORE || 1967d34265a3SJohannes Berg treatment == REG_REQ_ALREADY_SET) 1968d34265a3SJohannes Berg return REG_REQ_IGNORE; 19690d97a619SLuis R. Rodriguez 19700d97a619SLuis R. Rodriguez user_request->intersect = treatment == REG_REQ_INTERSECT; 19710d97a619SLuis R. Rodriguez user_request->processed = false; 19725ad6ef5eSLuis R. Rodriguez 1973cecbb069SJohannes Berg if (reg_query_database(user_request)) { 197405f1a3eaSLuis R. Rodriguez reg_update_last_request(user_request); 19750d97a619SLuis R. Rodriguez user_alpha2[0] = user_request->alpha2[0]; 19760d97a619SLuis R. Rodriguez user_alpha2[1] = user_request->alpha2[1]; 1977d34265a3SJohannes Berg return REG_REQ_OK; 197825b20dbdSJohannes Berg } 1979d34265a3SJohannes Berg 1980d34265a3SJohannes Berg return REG_REQ_IGNORE; 19810d97a619SLuis R. Rodriguez } 19820d97a619SLuis R. Rodriguez 198321636c7fSLuis R. Rodriguez static enum reg_request_treatment 198421636c7fSLuis R. Rodriguez __reg_process_hint_driver(struct regulatory_request *driver_request) 198521636c7fSLuis R. Rodriguez { 198621636c7fSLuis R. Rodriguez struct regulatory_request *lr = get_last_request(); 198721636c7fSLuis R. Rodriguez 198821636c7fSLuis R. Rodriguez if (lr->initiator == NL80211_REGDOM_SET_BY_CORE) { 198921636c7fSLuis R. Rodriguez if (regdom_changes(driver_request->alpha2)) 199021636c7fSLuis R. Rodriguez return REG_REQ_OK; 199121636c7fSLuis R. Rodriguez return REG_REQ_ALREADY_SET; 199221636c7fSLuis R. Rodriguez } 199321636c7fSLuis R. Rodriguez 199421636c7fSLuis R. Rodriguez /* 199521636c7fSLuis R. Rodriguez * This would happen if you unplug and plug your card 199621636c7fSLuis R. Rodriguez * back in or if you add a new device for which the previously 199721636c7fSLuis R. Rodriguez * loaded card also agrees on the regulatory domain. 199821636c7fSLuis R. Rodriguez */ 199921636c7fSLuis R. Rodriguez if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER && 200021636c7fSLuis R. Rodriguez !regdom_changes(driver_request->alpha2)) 200121636c7fSLuis R. Rodriguez return REG_REQ_ALREADY_SET; 200221636c7fSLuis R. Rodriguez 200321636c7fSLuis R. Rodriguez return REG_REQ_INTERSECT; 200421636c7fSLuis R. Rodriguez } 200521636c7fSLuis R. Rodriguez 200621636c7fSLuis R. Rodriguez /** 200721636c7fSLuis R. Rodriguez * reg_process_hint_driver - process driver regulatory requests 200821636c7fSLuis R. Rodriguez * @driver_request: a pending driver regulatory request 200921636c7fSLuis R. Rodriguez * 201021636c7fSLuis R. Rodriguez * The wireless subsystem can use this function to process 201121636c7fSLuis R. Rodriguez * a regulatory request issued by an 802.11 driver. 201221636c7fSLuis R. Rodriguez * 201321636c7fSLuis R. Rodriguez * Returns one of the different reg request treatment values. 201421636c7fSLuis R. Rodriguez */ 201521636c7fSLuis R. Rodriguez static enum reg_request_treatment 201621636c7fSLuis R. Rodriguez reg_process_hint_driver(struct wiphy *wiphy, 201721636c7fSLuis R. Rodriguez struct regulatory_request *driver_request) 201821636c7fSLuis R. Rodriguez { 201934f05f54SArik Nemtsov const struct ieee80211_regdomain *regd, *tmp; 202021636c7fSLuis R. Rodriguez enum reg_request_treatment treatment; 202121636c7fSLuis R. Rodriguez 202221636c7fSLuis R. Rodriguez treatment = __reg_process_hint_driver(driver_request); 202321636c7fSLuis R. Rodriguez 202421636c7fSLuis R. Rodriguez switch (treatment) { 202521636c7fSLuis R. Rodriguez case REG_REQ_OK: 202621636c7fSLuis R. Rodriguez break; 202721636c7fSLuis R. Rodriguez case REG_REQ_IGNORE: 2028d34265a3SJohannes Berg return REG_REQ_IGNORE; 202921636c7fSLuis R. Rodriguez case REG_REQ_INTERSECT: 203021636c7fSLuis R. Rodriguez case REG_REQ_ALREADY_SET: 203121636c7fSLuis R. Rodriguez regd = reg_copy_regd(get_cfg80211_regdom()); 2032d34265a3SJohannes Berg if (IS_ERR(regd)) 2033d34265a3SJohannes Berg return REG_REQ_IGNORE; 203434f05f54SArik Nemtsov 203534f05f54SArik Nemtsov tmp = get_wiphy_regdom(wiphy); 203621636c7fSLuis R. Rodriguez rcu_assign_pointer(wiphy->regd, regd); 203734f05f54SArik Nemtsov rcu_free_regdom(tmp); 203821636c7fSLuis R. Rodriguez } 203921636c7fSLuis R. Rodriguez 204021636c7fSLuis R. Rodriguez 204121636c7fSLuis R. Rodriguez driver_request->intersect = treatment == REG_REQ_INTERSECT; 204221636c7fSLuis R. Rodriguez driver_request->processed = false; 20435ad6ef5eSLuis R. Rodriguez 204421636c7fSLuis R. Rodriguez /* 204521636c7fSLuis R. Rodriguez * Since CRDA will not be called in this case as we already 204621636c7fSLuis R. Rodriguez * have applied the requested regulatory domain before we just 204721636c7fSLuis R. Rodriguez * inform userspace we have processed the request 204821636c7fSLuis R. Rodriguez */ 204921636c7fSLuis R. Rodriguez if (treatment == REG_REQ_ALREADY_SET) { 205021636c7fSLuis R. Rodriguez nl80211_send_reg_change_event(driver_request); 205125b20dbdSJohannes Berg reg_update_last_request(driver_request); 205221636c7fSLuis R. Rodriguez reg_set_request_processed(); 2053480908a7SJohannes Berg return REG_REQ_ALREADY_SET; 205421636c7fSLuis R. Rodriguez } 205521636c7fSLuis R. Rodriguez 2056d34265a3SJohannes Berg if (reg_query_database(driver_request)) { 205725b20dbdSJohannes Berg reg_update_last_request(driver_request); 205825b20dbdSJohannes Berg return REG_REQ_OK; 205921636c7fSLuis R. Rodriguez } 206021636c7fSLuis R. Rodriguez 2061d34265a3SJohannes Berg return REG_REQ_IGNORE; 2062d34265a3SJohannes Berg } 2063d34265a3SJohannes Berg 2064b23e7a9eSLuis R. Rodriguez static enum reg_request_treatment 2065b23e7a9eSLuis R. Rodriguez __reg_process_hint_country_ie(struct wiphy *wiphy, 2066b23e7a9eSLuis R. Rodriguez struct regulatory_request *country_ie_request) 2067b23e7a9eSLuis R. Rodriguez { 2068b23e7a9eSLuis R. Rodriguez struct wiphy *last_wiphy = NULL; 2069b23e7a9eSLuis R. Rodriguez struct regulatory_request *lr = get_last_request(); 2070b23e7a9eSLuis R. Rodriguez 2071b23e7a9eSLuis R. Rodriguez if (reg_request_cell_base(lr)) { 2072b23e7a9eSLuis R. Rodriguez /* Trust a Cell base station over the AP's country IE */ 2073b23e7a9eSLuis R. Rodriguez if (regdom_changes(country_ie_request->alpha2)) 2074b23e7a9eSLuis R. Rodriguez return REG_REQ_IGNORE; 2075b23e7a9eSLuis R. Rodriguez return REG_REQ_ALREADY_SET; 20762a901468SLuis R. Rodriguez } else { 20772a901468SLuis R. Rodriguez if (wiphy->regulatory_flags & REGULATORY_COUNTRY_IE_IGNORE) 20782a901468SLuis R. Rodriguez return REG_REQ_IGNORE; 2079b23e7a9eSLuis R. Rodriguez } 2080b23e7a9eSLuis R. Rodriguez 2081b23e7a9eSLuis R. Rodriguez if (unlikely(!is_an_alpha2(country_ie_request->alpha2))) 2082b23e7a9eSLuis R. Rodriguez return -EINVAL; 20832f1c6c57SLuis R. Rodriguez 20842f1c6c57SLuis R. Rodriguez if (lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE) 20852f1c6c57SLuis R. Rodriguez return REG_REQ_OK; 20862f1c6c57SLuis R. Rodriguez 20872f1c6c57SLuis R. Rodriguez last_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx); 20882f1c6c57SLuis R. Rodriguez 2089b23e7a9eSLuis R. Rodriguez if (last_wiphy != wiphy) { 2090b23e7a9eSLuis R. Rodriguez /* 2091b23e7a9eSLuis R. Rodriguez * Two cards with two APs claiming different 2092b23e7a9eSLuis R. Rodriguez * Country IE alpha2s. We could 2093b23e7a9eSLuis R. Rodriguez * intersect them, but that seems unlikely 2094b23e7a9eSLuis R. Rodriguez * to be correct. Reject second one for now. 2095b23e7a9eSLuis R. Rodriguez */ 2096b23e7a9eSLuis R. Rodriguez if (regdom_changes(country_ie_request->alpha2)) 2097b23e7a9eSLuis R. Rodriguez return REG_REQ_IGNORE; 2098b23e7a9eSLuis R. Rodriguez return REG_REQ_ALREADY_SET; 2099b23e7a9eSLuis R. Rodriguez } 210070dcec5aSEmmanuel Grumbach 210170dcec5aSEmmanuel Grumbach if (regdom_changes(country_ie_request->alpha2)) 2102b23e7a9eSLuis R. Rodriguez return REG_REQ_OK; 2103b23e7a9eSLuis R. Rodriguez return REG_REQ_ALREADY_SET; 2104b23e7a9eSLuis R. Rodriguez } 2105b23e7a9eSLuis R. Rodriguez 2106b3eb7f3fSLuis R. Rodriguez /** 2107b23e7a9eSLuis R. Rodriguez * reg_process_hint_country_ie - process regulatory requests from country IEs 2108b23e7a9eSLuis R. Rodriguez * @country_ie_request: a regulatory request from a country IE 2109d1c96a9aSLuis R. Rodriguez * 2110b23e7a9eSLuis R. Rodriguez * The wireless subsystem can use this function to process 2111b23e7a9eSLuis R. Rodriguez * a regulatory request issued by a country Information Element. 2112d1c96a9aSLuis R. Rodriguez * 21132f92212bSJohannes Berg * Returns one of the different reg request treatment values. 2114d1c96a9aSLuis R. Rodriguez */ 21152f92212bSJohannes Berg static enum reg_request_treatment 2116b23e7a9eSLuis R. Rodriguez reg_process_hint_country_ie(struct wiphy *wiphy, 2117b23e7a9eSLuis R. Rodriguez struct regulatory_request *country_ie_request) 2118b2e1b302SLuis R. Rodriguez { 21192f92212bSJohannes Berg enum reg_request_treatment treatment; 2120b2e1b302SLuis R. Rodriguez 2121b23e7a9eSLuis R. Rodriguez treatment = __reg_process_hint_country_ie(wiphy, country_ie_request); 2122761cf7ecSLuis R. Rodriguez 21232f92212bSJohannes Berg switch (treatment) { 21242f92212bSJohannes Berg case REG_REQ_OK: 21252f92212bSJohannes Berg break; 2126b23e7a9eSLuis R. Rodriguez case REG_REQ_IGNORE: 2127d34265a3SJohannes Berg return REG_REQ_IGNORE; 2128b23e7a9eSLuis R. Rodriguez case REG_REQ_ALREADY_SET: 2129c888393bSArik Nemtsov reg_free_request(country_ie_request); 2130480908a7SJohannes Berg return REG_REQ_ALREADY_SET; 2131b23e7a9eSLuis R. Rodriguez case REG_REQ_INTERSECT: 2132fb1fc7adSLuis R. Rodriguez /* 2133b23e7a9eSLuis R. Rodriguez * This doesn't happen yet, not sure we 2134b23e7a9eSLuis R. Rodriguez * ever want to support it for this case. 2135fb1fc7adSLuis R. Rodriguez */ 2136b23e7a9eSLuis R. Rodriguez WARN_ONCE(1, "Unexpected intersection for country IEs"); 2137d34265a3SJohannes Berg return REG_REQ_IGNORE; 2138d951c1ddSLuis R. Rodriguez } 2139b2e1b302SLuis R. Rodriguez 2140b23e7a9eSLuis R. Rodriguez country_ie_request->intersect = false; 2141b23e7a9eSLuis R. Rodriguez country_ie_request->processed = false; 21425ad6ef5eSLuis R. Rodriguez 2143d34265a3SJohannes Berg if (reg_query_database(country_ie_request)) { 214405f1a3eaSLuis R. Rodriguez reg_update_last_request(country_ie_request); 214525b20dbdSJohannes Berg return REG_REQ_OK; 2146b2e1b302SLuis R. Rodriguez } 2147b2e1b302SLuis R. Rodriguez 2148d34265a3SJohannes Berg return REG_REQ_IGNORE; 2149d34265a3SJohannes Berg } 2150d34265a3SJohannes Berg 215130a548c7SLuis R. Rodriguez /* This processes *all* regulatory hints */ 21521daa37c7SLuis R. Rodriguez static void reg_process_hint(struct regulatory_request *reg_request) 2153fe33eb39SLuis R. Rodriguez { 2154fe33eb39SLuis R. Rodriguez struct wiphy *wiphy = NULL; 2155b3eb7f3fSLuis R. Rodriguez enum reg_request_treatment treatment; 2156fe33eb39SLuis R. Rodriguez 2157f4173766SJohannes Berg if (reg_request->wiphy_idx != WIPHY_IDX_INVALID) 2158fe33eb39SLuis R. Rodriguez wiphy = wiphy_idx_to_wiphy(reg_request->wiphy_idx); 2159fe33eb39SLuis R. Rodriguez 2160b3eb7f3fSLuis R. Rodriguez switch (reg_request->initiator) { 2161b3eb7f3fSLuis R. Rodriguez case NL80211_REGDOM_SET_BY_CORE: 2162d34265a3SJohannes Berg treatment = reg_process_hint_core(reg_request); 2163d34265a3SJohannes Berg break; 2164b3eb7f3fSLuis R. Rodriguez case NL80211_REGDOM_SET_BY_USER: 2165d34265a3SJohannes Berg treatment = reg_process_hint_user(reg_request); 2166d34265a3SJohannes Berg break; 2167b3eb7f3fSLuis R. Rodriguez case NL80211_REGDOM_SET_BY_DRIVER: 2168772f0389SIlan Peer if (!wiphy) 2169772f0389SIlan Peer goto out_free; 217021636c7fSLuis R. Rodriguez treatment = reg_process_hint_driver(wiphy, reg_request); 217121636c7fSLuis R. Rodriguez break; 2172b3eb7f3fSLuis R. Rodriguez case NL80211_REGDOM_SET_BY_COUNTRY_IE: 2173772f0389SIlan Peer if (!wiphy) 2174772f0389SIlan Peer goto out_free; 2175b23e7a9eSLuis R. Rodriguez treatment = reg_process_hint_country_ie(wiphy, reg_request); 2176b3eb7f3fSLuis R. Rodriguez break; 2177b3eb7f3fSLuis R. Rodriguez default: 2178b3eb7f3fSLuis R. Rodriguez WARN(1, "invalid initiator %d\n", reg_request->initiator); 2179772f0389SIlan Peer goto out_free; 2180b3eb7f3fSLuis R. Rodriguez } 2181b3eb7f3fSLuis R. Rodriguez 2182d34265a3SJohannes Berg if (treatment == REG_REQ_IGNORE) 2183d34265a3SJohannes Berg goto out_free; 2184d34265a3SJohannes Berg 2185480908a7SJohannes Berg WARN(treatment != REG_REQ_OK && treatment != REG_REQ_ALREADY_SET, 2186480908a7SJohannes Berg "unexpected treatment value %d\n", treatment); 2187480908a7SJohannes Berg 2188841b351cSJohn Linville /* This is required so that the orig_* parameters are saved. 2189841b351cSJohn Linville * NOTE: treatment must be set for any case that reaches here! 2190841b351cSJohn Linville */ 2191b23e7a9eSLuis R. Rodriguez if (treatment == REG_REQ_ALREADY_SET && wiphy && 2192ad932f04SArik Nemtsov wiphy->regulatory_flags & REGULATORY_STRICT_REG) { 21931daa37c7SLuis R. Rodriguez wiphy_update_regulatory(wiphy, reg_request->initiator); 2194ad932f04SArik Nemtsov reg_check_channels(); 2195ad932f04SArik Nemtsov } 2196772f0389SIlan Peer 2197772f0389SIlan Peer return; 2198772f0389SIlan Peer 2199772f0389SIlan Peer out_free: 2200c888393bSArik Nemtsov reg_free_request(reg_request); 2201fe33eb39SLuis R. Rodriguez } 2202fe33eb39SLuis R. Rodriguez 2203ef51fb1dSArik Nemtsov static bool reg_only_self_managed_wiphys(void) 2204ef51fb1dSArik Nemtsov { 2205ef51fb1dSArik Nemtsov struct cfg80211_registered_device *rdev; 2206ef51fb1dSArik Nemtsov struct wiphy *wiphy; 2207ef51fb1dSArik Nemtsov bool self_managed_found = false; 2208ef51fb1dSArik Nemtsov 2209ef51fb1dSArik Nemtsov ASSERT_RTNL(); 2210ef51fb1dSArik Nemtsov 2211ef51fb1dSArik Nemtsov list_for_each_entry(rdev, &cfg80211_rdev_list, list) { 2212ef51fb1dSArik Nemtsov wiphy = &rdev->wiphy; 2213ef51fb1dSArik Nemtsov if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) 2214ef51fb1dSArik Nemtsov self_managed_found = true; 2215ef51fb1dSArik Nemtsov else 2216ef51fb1dSArik Nemtsov return false; 2217ef51fb1dSArik Nemtsov } 2218ef51fb1dSArik Nemtsov 2219ef51fb1dSArik Nemtsov /* make sure at least one self-managed wiphy exists */ 2220ef51fb1dSArik Nemtsov return self_managed_found; 2221ef51fb1dSArik Nemtsov } 2222ef51fb1dSArik Nemtsov 2223b2e253cfSLuis R. Rodriguez /* 2224b2e253cfSLuis R. Rodriguez * Processes regulatory hints, this is all the NL80211_REGDOM_SET_BY_* 2225b2e253cfSLuis R. Rodriguez * Regulatory hints come on a first come first serve basis and we 2226b2e253cfSLuis R. Rodriguez * must process each one atomically. 2227b2e253cfSLuis R. Rodriguez */ 2228fe33eb39SLuis R. Rodriguez static void reg_process_pending_hints(void) 2229fe33eb39SLuis R. Rodriguez { 2230c492db37SJohannes Berg struct regulatory_request *reg_request, *lr; 2231fe33eb39SLuis R. Rodriguez 2232c492db37SJohannes Berg lr = get_last_request(); 2233b0e2880bSLuis R. Rodriguez 2234b2e253cfSLuis R. Rodriguez /* When last_request->processed becomes true this will be rescheduled */ 2235c492db37SJohannes Berg if (lr && !lr->processed) { 223696cce12fSLuis R. Rodriguez reg_process_hint(lr); 22375fe231e8SJohannes Berg return; 2238b2e253cfSLuis R. Rodriguez } 2239b2e253cfSLuis R. Rodriguez 2240fe33eb39SLuis R. Rodriguez spin_lock(®_requests_lock); 2241b2e253cfSLuis R. Rodriguez 2242b2e253cfSLuis R. Rodriguez if (list_empty(®_requests_list)) { 2243b2e253cfSLuis R. Rodriguez spin_unlock(®_requests_lock); 22445fe231e8SJohannes Berg return; 2245b2e253cfSLuis R. Rodriguez } 2246b2e253cfSLuis R. Rodriguez 2247fe33eb39SLuis R. Rodriguez reg_request = list_first_entry(®_requests_list, 2248fe33eb39SLuis R. Rodriguez struct regulatory_request, 2249fe33eb39SLuis R. Rodriguez list); 2250fe33eb39SLuis R. Rodriguez list_del_init(®_request->list); 2251fe33eb39SLuis R. Rodriguez 2252d951c1ddSLuis R. Rodriguez spin_unlock(®_requests_lock); 2253b0e2880bSLuis R. Rodriguez 2254ef51fb1dSArik Nemtsov if (reg_only_self_managed_wiphys()) { 2255ef51fb1dSArik Nemtsov reg_free_request(reg_request); 2256ef51fb1dSArik Nemtsov return; 2257ef51fb1dSArik Nemtsov } 2258ef51fb1dSArik Nemtsov 22591daa37c7SLuis R. Rodriguez reg_process_hint(reg_request); 22602e54a689SBen 22612e54a689SBen lr = get_last_request(); 22622e54a689SBen 22632e54a689SBen spin_lock(®_requests_lock); 22642e54a689SBen if (!list_empty(®_requests_list) && lr && lr->processed) 22652e54a689SBen schedule_work(®_work); 22662e54a689SBen spin_unlock(®_requests_lock); 2267fe33eb39SLuis R. Rodriguez } 2268fe33eb39SLuis R. Rodriguez 2269e38f8a7aSLuis R. Rodriguez /* Processes beacon hints -- this has nothing to do with country IEs */ 2270e38f8a7aSLuis R. Rodriguez static void reg_process_pending_beacon_hints(void) 2271e38f8a7aSLuis R. Rodriguez { 227279c97e97SJohannes Berg struct cfg80211_registered_device *rdev; 2273e38f8a7aSLuis R. Rodriguez struct reg_beacon *pending_beacon, *tmp; 2274e38f8a7aSLuis R. Rodriguez 2275e38f8a7aSLuis R. Rodriguez /* This goes through the _pending_ beacon list */ 2276e38f8a7aSLuis R. Rodriguez spin_lock_bh(®_pending_beacons_lock); 2277e38f8a7aSLuis R. Rodriguez 2278e38f8a7aSLuis R. Rodriguez list_for_each_entry_safe(pending_beacon, tmp, 2279e38f8a7aSLuis R. Rodriguez ®_pending_beacons, list) { 2280e38f8a7aSLuis R. Rodriguez list_del_init(&pending_beacon->list); 2281e38f8a7aSLuis R. Rodriguez 2282e38f8a7aSLuis R. Rodriguez /* Applies the beacon hint to current wiphys */ 228379c97e97SJohannes Berg list_for_each_entry(rdev, &cfg80211_rdev_list, list) 228479c97e97SJohannes Berg wiphy_update_new_beacon(&rdev->wiphy, pending_beacon); 2285e38f8a7aSLuis R. Rodriguez 2286e38f8a7aSLuis R. Rodriguez /* Remembers the beacon hint for new wiphys or reg changes */ 2287e38f8a7aSLuis R. Rodriguez list_add_tail(&pending_beacon->list, ®_beacon_list); 2288e38f8a7aSLuis R. Rodriguez } 2289e38f8a7aSLuis R. Rodriguez 2290e38f8a7aSLuis R. Rodriguez spin_unlock_bh(®_pending_beacons_lock); 2291e38f8a7aSLuis R. Rodriguez } 2292e38f8a7aSLuis R. Rodriguez 2293b0d7aa59SJonathan Doron static void reg_process_self_managed_hints(void) 2294b0d7aa59SJonathan Doron { 2295b0d7aa59SJonathan Doron struct cfg80211_registered_device *rdev; 2296b0d7aa59SJonathan Doron struct wiphy *wiphy; 2297b0d7aa59SJonathan Doron const struct ieee80211_regdomain *tmp; 2298b0d7aa59SJonathan Doron const struct ieee80211_regdomain *regd; 2299b0d7aa59SJonathan Doron enum ieee80211_band band; 2300b0d7aa59SJonathan Doron struct regulatory_request request = {}; 2301b0d7aa59SJonathan Doron 2302b0d7aa59SJonathan Doron list_for_each_entry(rdev, &cfg80211_rdev_list, list) { 2303b0d7aa59SJonathan Doron wiphy = &rdev->wiphy; 2304b0d7aa59SJonathan Doron 2305b0d7aa59SJonathan Doron spin_lock(®_requests_lock); 2306b0d7aa59SJonathan Doron regd = rdev->requested_regd; 2307b0d7aa59SJonathan Doron rdev->requested_regd = NULL; 2308b0d7aa59SJonathan Doron spin_unlock(®_requests_lock); 2309b0d7aa59SJonathan Doron 2310b0d7aa59SJonathan Doron if (regd == NULL) 2311b0d7aa59SJonathan Doron continue; 2312b0d7aa59SJonathan Doron 2313b0d7aa59SJonathan Doron tmp = get_wiphy_regdom(wiphy); 2314b0d7aa59SJonathan Doron rcu_assign_pointer(wiphy->regd, regd); 2315b0d7aa59SJonathan Doron rcu_free_regdom(tmp); 2316b0d7aa59SJonathan Doron 2317b0d7aa59SJonathan Doron for (band = 0; band < IEEE80211_NUM_BANDS; band++) 2318b0d7aa59SJonathan Doron handle_band_custom(wiphy, wiphy->bands[band], regd); 2319b0d7aa59SJonathan Doron 2320b0d7aa59SJonathan Doron reg_process_ht_flags(wiphy); 2321b0d7aa59SJonathan Doron 2322b0d7aa59SJonathan Doron request.wiphy_idx = get_wiphy_idx(wiphy); 2323b0d7aa59SJonathan Doron request.alpha2[0] = regd->alpha2[0]; 2324b0d7aa59SJonathan Doron request.alpha2[1] = regd->alpha2[1]; 2325b0d7aa59SJonathan Doron request.initiator = NL80211_REGDOM_SET_BY_DRIVER; 2326b0d7aa59SJonathan Doron 2327b0d7aa59SJonathan Doron nl80211_send_wiphy_reg_change_event(&request); 2328b0d7aa59SJonathan Doron } 2329b0d7aa59SJonathan Doron 2330b0d7aa59SJonathan Doron reg_check_channels(); 2331b0d7aa59SJonathan Doron } 2332b0d7aa59SJonathan Doron 2333fe33eb39SLuis R. Rodriguez static void reg_todo(struct work_struct *work) 2334fe33eb39SLuis R. Rodriguez { 23355fe231e8SJohannes Berg rtnl_lock(); 2336fe33eb39SLuis R. Rodriguez reg_process_pending_hints(); 2337e38f8a7aSLuis R. Rodriguez reg_process_pending_beacon_hints(); 2338b0d7aa59SJonathan Doron reg_process_self_managed_hints(); 23395fe231e8SJohannes Berg rtnl_unlock(); 2340fe33eb39SLuis R. Rodriguez } 2341fe33eb39SLuis R. Rodriguez 2342fe33eb39SLuis R. Rodriguez static void queue_regulatory_request(struct regulatory_request *request) 2343fe33eb39SLuis R. Rodriguez { 2344c61029c7SJohn W. Linville request->alpha2[0] = toupper(request->alpha2[0]); 2345c61029c7SJohn W. Linville request->alpha2[1] = toupper(request->alpha2[1]); 2346c61029c7SJohn W. Linville 2347fe33eb39SLuis R. Rodriguez spin_lock(®_requests_lock); 2348fe33eb39SLuis R. Rodriguez list_add_tail(&request->list, ®_requests_list); 2349fe33eb39SLuis R. Rodriguez spin_unlock(®_requests_lock); 2350fe33eb39SLuis R. Rodriguez 2351fe33eb39SLuis R. Rodriguez schedule_work(®_work); 2352fe33eb39SLuis R. Rodriguez } 2353fe33eb39SLuis R. Rodriguez 235409d989d1SLuis R. Rodriguez /* 235509d989d1SLuis R. Rodriguez * Core regulatory hint -- happens during cfg80211_init() 235609d989d1SLuis R. Rodriguez * and when we restore regulatory settings. 235709d989d1SLuis R. Rodriguez */ 2358ba25c141SLuis R. Rodriguez static int regulatory_hint_core(const char *alpha2) 2359ba25c141SLuis R. Rodriguez { 2360ba25c141SLuis R. Rodriguez struct regulatory_request *request; 2361ba25c141SLuis R. Rodriguez 23621a919318SJohannes Berg request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); 2363ba25c141SLuis R. Rodriguez if (!request) 2364ba25c141SLuis R. Rodriguez return -ENOMEM; 2365ba25c141SLuis R. Rodriguez 2366ba25c141SLuis R. Rodriguez request->alpha2[0] = alpha2[0]; 2367ba25c141SLuis R. Rodriguez request->alpha2[1] = alpha2[1]; 23687db90f4aSLuis R. Rodriguez request->initiator = NL80211_REGDOM_SET_BY_CORE; 2369ba25c141SLuis R. Rodriguez 237031e99729SLuis R. Rodriguez queue_regulatory_request(request); 23715078b2e3SLuis R. Rodriguez 2372fe33eb39SLuis R. Rodriguez return 0; 2373ba25c141SLuis R. Rodriguez } 2374ba25c141SLuis R. Rodriguez 2375fe33eb39SLuis R. Rodriguez /* User hints */ 237657b5ce07SLuis R. Rodriguez int regulatory_hint_user(const char *alpha2, 237757b5ce07SLuis R. Rodriguez enum nl80211_user_reg_hint_type user_reg_hint_type) 2378b2e1b302SLuis R. Rodriguez { 2379fe33eb39SLuis R. Rodriguez struct regulatory_request *request; 2380fe33eb39SLuis R. Rodriguez 2381fdc9d7b2SJohannes Berg if (WARN_ON(!alpha2)) 2382fdc9d7b2SJohannes Berg return -EINVAL; 2383b2e1b302SLuis R. Rodriguez 2384fe33eb39SLuis R. Rodriguez request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); 2385fe33eb39SLuis R. Rodriguez if (!request) 2386fe33eb39SLuis R. Rodriguez return -ENOMEM; 2387fe33eb39SLuis R. Rodriguez 2388f4173766SJohannes Berg request->wiphy_idx = WIPHY_IDX_INVALID; 2389fe33eb39SLuis R. Rodriguez request->alpha2[0] = alpha2[0]; 2390fe33eb39SLuis R. Rodriguez request->alpha2[1] = alpha2[1]; 2391e12822e1SLuis R. Rodriguez request->initiator = NL80211_REGDOM_SET_BY_USER; 239257b5ce07SLuis R. Rodriguez request->user_reg_hint_type = user_reg_hint_type; 2393fe33eb39SLuis R. Rodriguez 2394c37722bdSIlan peer /* Allow calling CRDA again */ 2395b6863036SJohannes Berg reset_crda_timeouts(); 2396c37722bdSIlan peer 2397fe33eb39SLuis R. Rodriguez queue_regulatory_request(request); 2398fe33eb39SLuis R. Rodriguez 2399fe33eb39SLuis R. Rodriguez return 0; 2400fe33eb39SLuis R. Rodriguez } 2401fe33eb39SLuis R. Rodriguez 240205050753SIlan peer int regulatory_hint_indoor(bool is_indoor, u32 portid) 240352616f2bSIlan Peer { 240405050753SIlan peer spin_lock(®_indoor_lock); 240552616f2bSIlan Peer 240605050753SIlan peer /* It is possible that more than one user space process is trying to 240705050753SIlan peer * configure the indoor setting. To handle such cases, clear the indoor 240805050753SIlan peer * setting in case that some process does not think that the device 240905050753SIlan peer * is operating in an indoor environment. In addition, if a user space 241005050753SIlan peer * process indicates that it is controlling the indoor setting, save its 241105050753SIlan peer * portid, i.e., make it the owner. 241205050753SIlan peer */ 241305050753SIlan peer reg_is_indoor = is_indoor; 241405050753SIlan peer if (reg_is_indoor) { 241505050753SIlan peer if (!reg_is_indoor_portid) 241605050753SIlan peer reg_is_indoor_portid = portid; 241705050753SIlan peer } else { 241805050753SIlan peer reg_is_indoor_portid = 0; 241905050753SIlan peer } 242052616f2bSIlan Peer 242105050753SIlan peer spin_unlock(®_indoor_lock); 242205050753SIlan peer 242305050753SIlan peer if (!is_indoor) 242405050753SIlan peer reg_check_channels(); 242552616f2bSIlan Peer 242652616f2bSIlan Peer return 0; 242752616f2bSIlan Peer } 242852616f2bSIlan Peer 242905050753SIlan peer void regulatory_netlink_notify(u32 portid) 243005050753SIlan peer { 243105050753SIlan peer spin_lock(®_indoor_lock); 243205050753SIlan peer 243305050753SIlan peer if (reg_is_indoor_portid != portid) { 243405050753SIlan peer spin_unlock(®_indoor_lock); 243505050753SIlan peer return; 243605050753SIlan peer } 243705050753SIlan peer 243805050753SIlan peer reg_is_indoor = false; 243905050753SIlan peer reg_is_indoor_portid = 0; 244005050753SIlan peer 244105050753SIlan peer spin_unlock(®_indoor_lock); 244205050753SIlan peer 244305050753SIlan peer reg_check_channels(); 244405050753SIlan peer } 244505050753SIlan peer 2446fe33eb39SLuis R. Rodriguez /* Driver hints */ 2447fe33eb39SLuis R. Rodriguez int regulatory_hint(struct wiphy *wiphy, const char *alpha2) 2448fe33eb39SLuis R. Rodriguez { 2449fe33eb39SLuis R. Rodriguez struct regulatory_request *request; 2450fe33eb39SLuis R. Rodriguez 2451fdc9d7b2SJohannes Berg if (WARN_ON(!alpha2 || !wiphy)) 2452fdc9d7b2SJohannes Berg return -EINVAL; 2453fe33eb39SLuis R. Rodriguez 24544f7b9140SLuis R. Rodriguez wiphy->regulatory_flags &= ~REGULATORY_CUSTOM_REG; 24554f7b9140SLuis R. Rodriguez 2456fe33eb39SLuis R. Rodriguez request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); 2457fe33eb39SLuis R. Rodriguez if (!request) 2458fe33eb39SLuis R. Rodriguez return -ENOMEM; 2459fe33eb39SLuis R. Rodriguez 2460fe33eb39SLuis R. Rodriguez request->wiphy_idx = get_wiphy_idx(wiphy); 2461fe33eb39SLuis R. Rodriguez 2462fe33eb39SLuis R. Rodriguez request->alpha2[0] = alpha2[0]; 2463fe33eb39SLuis R. Rodriguez request->alpha2[1] = alpha2[1]; 24647db90f4aSLuis R. Rodriguez request->initiator = NL80211_REGDOM_SET_BY_DRIVER; 2465fe33eb39SLuis R. Rodriguez 2466c37722bdSIlan peer /* Allow calling CRDA again */ 2467b6863036SJohannes Berg reset_crda_timeouts(); 2468c37722bdSIlan peer 2469fe33eb39SLuis R. Rodriguez queue_regulatory_request(request); 2470fe33eb39SLuis R. Rodriguez 2471fe33eb39SLuis R. Rodriguez return 0; 2472b2e1b302SLuis R. Rodriguez } 2473b2e1b302SLuis R. Rodriguez EXPORT_SYMBOL(regulatory_hint); 2474b2e1b302SLuis R. Rodriguez 2475789fd033SLuis R. Rodriguez void regulatory_hint_country_ie(struct wiphy *wiphy, enum ieee80211_band band, 24761a919318SJohannes Berg const u8 *country_ie, u8 country_ie_len) 24773f2355cbSLuis R. Rodriguez { 24783f2355cbSLuis R. Rodriguez char alpha2[2]; 24793f2355cbSLuis R. Rodriguez enum environment_cap env = ENVIRON_ANY; 2480db2424c5SJohannes Berg struct regulatory_request *request = NULL, *lr; 2481d335fe63SLuis R. Rodriguez 24823f2355cbSLuis R. Rodriguez /* IE len must be evenly divisible by 2 */ 24833f2355cbSLuis R. Rodriguez if (country_ie_len & 0x01) 2484db2424c5SJohannes Berg return; 24853f2355cbSLuis R. Rodriguez 24863f2355cbSLuis R. Rodriguez if (country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN) 2487db2424c5SJohannes Berg return; 2488db2424c5SJohannes Berg 2489db2424c5SJohannes Berg request = kzalloc(sizeof(*request), GFP_KERNEL); 2490db2424c5SJohannes Berg if (!request) 2491db2424c5SJohannes Berg return; 24923f2355cbSLuis R. Rodriguez 24933f2355cbSLuis R. Rodriguez alpha2[0] = country_ie[0]; 24943f2355cbSLuis R. Rodriguez alpha2[1] = country_ie[1]; 24953f2355cbSLuis R. Rodriguez 24963f2355cbSLuis R. Rodriguez if (country_ie[2] == 'I') 24973f2355cbSLuis R. Rodriguez env = ENVIRON_INDOOR; 24983f2355cbSLuis R. Rodriguez else if (country_ie[2] == 'O') 24993f2355cbSLuis R. Rodriguez env = ENVIRON_OUTDOOR; 25003f2355cbSLuis R. Rodriguez 2501db2424c5SJohannes Berg rcu_read_lock(); 2502db2424c5SJohannes Berg lr = get_last_request(); 2503db2424c5SJohannes Berg 2504db2424c5SJohannes Berg if (unlikely(!lr)) 2505db2424c5SJohannes Berg goto out; 2506db2424c5SJohannes Berg 2507fb1fc7adSLuis R. Rodriguez /* 25088b19e6caSLuis R. Rodriguez * We will run this only upon a successful connection on cfg80211. 25094b44c8bcSLuis R. Rodriguez * We leave conflict resolution to the workqueue, where can hold 25105fe231e8SJohannes Berg * the RTNL. 2511fb1fc7adSLuis R. Rodriguez */ 2512c492db37SJohannes Berg if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE && 2513c492db37SJohannes Berg lr->wiphy_idx != WIPHY_IDX_INVALID) 25143f2355cbSLuis R. Rodriguez goto out; 25153f2355cbSLuis R. Rodriguez 2516fe33eb39SLuis R. Rodriguez request->wiphy_idx = get_wiphy_idx(wiphy); 25174f366c5dSJohn W. Linville request->alpha2[0] = alpha2[0]; 25184f366c5dSJohn W. Linville request->alpha2[1] = alpha2[1]; 25197db90f4aSLuis R. Rodriguez request->initiator = NL80211_REGDOM_SET_BY_COUNTRY_IE; 2520fe33eb39SLuis R. Rodriguez request->country_ie_env = env; 25213f2355cbSLuis R. Rodriguez 2522c37722bdSIlan peer /* Allow calling CRDA again */ 2523b6863036SJohannes Berg reset_crda_timeouts(); 2524c37722bdSIlan peer 2525fe33eb39SLuis R. Rodriguez queue_regulatory_request(request); 2526db2424c5SJohannes Berg request = NULL; 25273f2355cbSLuis R. Rodriguez out: 2528db2424c5SJohannes Berg kfree(request); 2529db2424c5SJohannes Berg rcu_read_unlock(); 25303f2355cbSLuis R. Rodriguez } 2531b2e1b302SLuis R. Rodriguez 253209d989d1SLuis R. Rodriguez static void restore_alpha2(char *alpha2, bool reset_user) 253309d989d1SLuis R. Rodriguez { 253409d989d1SLuis R. Rodriguez /* indicates there is no alpha2 to consider for restoration */ 253509d989d1SLuis R. Rodriguez alpha2[0] = '9'; 253609d989d1SLuis R. Rodriguez alpha2[1] = '7'; 253709d989d1SLuis R. Rodriguez 253809d989d1SLuis R. Rodriguez /* The user setting has precedence over the module parameter */ 253909d989d1SLuis R. Rodriguez if (is_user_regdom_saved()) { 254009d989d1SLuis R. Rodriguez /* Unless we're asked to ignore it and reset it */ 254109d989d1SLuis R. Rodriguez if (reset_user) { 25421a919318SJohannes Berg REG_DBG_PRINT("Restoring regulatory settings including user preference\n"); 254309d989d1SLuis R. Rodriguez user_alpha2[0] = '9'; 254409d989d1SLuis R. Rodriguez user_alpha2[1] = '7'; 254509d989d1SLuis R. Rodriguez 254609d989d1SLuis R. Rodriguez /* 254709d989d1SLuis R. Rodriguez * If we're ignoring user settings, we still need to 254809d989d1SLuis R. Rodriguez * check the module parameter to ensure we put things 254909d989d1SLuis R. Rodriguez * back as they were for a full restore. 255009d989d1SLuis R. Rodriguez */ 255109d989d1SLuis R. Rodriguez if (!is_world_regdom(ieee80211_regdom)) { 25521a919318SJohannes Berg REG_DBG_PRINT("Keeping preference on module parameter ieee80211_regdom: %c%c\n", 25531a919318SJohannes Berg ieee80211_regdom[0], ieee80211_regdom[1]); 255409d989d1SLuis R. Rodriguez alpha2[0] = ieee80211_regdom[0]; 255509d989d1SLuis R. Rodriguez alpha2[1] = ieee80211_regdom[1]; 255609d989d1SLuis R. Rodriguez } 255709d989d1SLuis R. Rodriguez } else { 25581a919318SJohannes Berg REG_DBG_PRINT("Restoring regulatory settings while preserving user preference for: %c%c\n", 25591a919318SJohannes Berg user_alpha2[0], user_alpha2[1]); 256009d989d1SLuis R. Rodriguez alpha2[0] = user_alpha2[0]; 256109d989d1SLuis R. Rodriguez alpha2[1] = user_alpha2[1]; 256209d989d1SLuis R. Rodriguez } 256309d989d1SLuis R. Rodriguez } else if (!is_world_regdom(ieee80211_regdom)) { 25641a919318SJohannes Berg REG_DBG_PRINT("Keeping preference on module parameter ieee80211_regdom: %c%c\n", 25651a919318SJohannes Berg ieee80211_regdom[0], ieee80211_regdom[1]); 256609d989d1SLuis R. Rodriguez alpha2[0] = ieee80211_regdom[0]; 256709d989d1SLuis R. Rodriguez alpha2[1] = ieee80211_regdom[1]; 256809d989d1SLuis R. Rodriguez } else 2569d91e41b6SLuis R. Rodriguez REG_DBG_PRINT("Restoring regulatory settings\n"); 257009d989d1SLuis R. Rodriguez } 257109d989d1SLuis R. Rodriguez 25725ce543d1SRajkumar Manoharan static void restore_custom_reg_settings(struct wiphy *wiphy) 25735ce543d1SRajkumar Manoharan { 25745ce543d1SRajkumar Manoharan struct ieee80211_supported_band *sband; 25755ce543d1SRajkumar Manoharan enum ieee80211_band band; 25765ce543d1SRajkumar Manoharan struct ieee80211_channel *chan; 25775ce543d1SRajkumar Manoharan int i; 25785ce543d1SRajkumar Manoharan 25795ce543d1SRajkumar Manoharan for (band = 0; band < IEEE80211_NUM_BANDS; band++) { 25805ce543d1SRajkumar Manoharan sband = wiphy->bands[band]; 25815ce543d1SRajkumar Manoharan if (!sband) 25825ce543d1SRajkumar Manoharan continue; 25835ce543d1SRajkumar Manoharan for (i = 0; i < sband->n_channels; i++) { 25845ce543d1SRajkumar Manoharan chan = &sband->channels[i]; 25855ce543d1SRajkumar Manoharan chan->flags = chan->orig_flags; 25865ce543d1SRajkumar Manoharan chan->max_antenna_gain = chan->orig_mag; 25875ce543d1SRajkumar Manoharan chan->max_power = chan->orig_mpwr; 2588899852afSPaul Stewart chan->beacon_found = false; 25895ce543d1SRajkumar Manoharan } 25905ce543d1SRajkumar Manoharan } 25915ce543d1SRajkumar Manoharan } 25925ce543d1SRajkumar Manoharan 259309d989d1SLuis R. Rodriguez /* 259409d989d1SLuis R. Rodriguez * Restoring regulatory settings involves ingoring any 259509d989d1SLuis R. Rodriguez * possibly stale country IE information and user regulatory 259609d989d1SLuis R. Rodriguez * settings if so desired, this includes any beacon hints 259709d989d1SLuis R. Rodriguez * learned as we could have traveled outside to another country 259809d989d1SLuis R. Rodriguez * after disconnection. To restore regulatory settings we do 259909d989d1SLuis R. Rodriguez * exactly what we did at bootup: 260009d989d1SLuis R. Rodriguez * 260109d989d1SLuis R. Rodriguez * - send a core regulatory hint 260209d989d1SLuis R. Rodriguez * - send a user regulatory hint if applicable 260309d989d1SLuis R. Rodriguez * 260409d989d1SLuis R. Rodriguez * Device drivers that send a regulatory hint for a specific country 260509d989d1SLuis R. Rodriguez * keep their own regulatory domain on wiphy->regd so that does does 260609d989d1SLuis R. Rodriguez * not need to be remembered. 260709d989d1SLuis R. Rodriguez */ 260809d989d1SLuis R. Rodriguez static void restore_regulatory_settings(bool reset_user) 260909d989d1SLuis R. Rodriguez { 261009d989d1SLuis R. Rodriguez char alpha2[2]; 2611cee0bec5SDmitry Shmidt char world_alpha2[2]; 261209d989d1SLuis R. Rodriguez struct reg_beacon *reg_beacon, *btmp; 261314609555SLuis R. Rodriguez LIST_HEAD(tmp_reg_req_list); 26145ce543d1SRajkumar Manoharan struct cfg80211_registered_device *rdev; 261509d989d1SLuis R. Rodriguez 26165fe231e8SJohannes Berg ASSERT_RTNL(); 26175fe231e8SJohannes Berg 261805050753SIlan peer /* 261905050753SIlan peer * Clear the indoor setting in case that it is not controlled by user 262005050753SIlan peer * space, as otherwise there is no guarantee that the device is still 262105050753SIlan peer * operating in an indoor environment. 262205050753SIlan peer */ 262305050753SIlan peer spin_lock(®_indoor_lock); 262405050753SIlan peer if (reg_is_indoor && !reg_is_indoor_portid) { 262552616f2bSIlan Peer reg_is_indoor = false; 262605050753SIlan peer reg_check_channels(); 262705050753SIlan peer } 262805050753SIlan peer spin_unlock(®_indoor_lock); 262952616f2bSIlan Peer 26302d319867SJohannes Berg reset_regdomains(true, &world_regdom); 263109d989d1SLuis R. Rodriguez restore_alpha2(alpha2, reset_user); 263209d989d1SLuis R. Rodriguez 263314609555SLuis R. Rodriguez /* 263414609555SLuis R. Rodriguez * If there's any pending requests we simply 263514609555SLuis R. Rodriguez * stash them to a temporary pending queue and 263614609555SLuis R. Rodriguez * add then after we've restored regulatory 263714609555SLuis R. Rodriguez * settings. 263814609555SLuis R. Rodriguez */ 263914609555SLuis R. Rodriguez spin_lock(®_requests_lock); 2640eeca9fceSIlan peer list_splice_tail_init(®_requests_list, &tmp_reg_req_list); 264114609555SLuis R. Rodriguez spin_unlock(®_requests_lock); 264214609555SLuis R. Rodriguez 264309d989d1SLuis R. Rodriguez /* Clear beacon hints */ 264409d989d1SLuis R. Rodriguez spin_lock_bh(®_pending_beacons_lock); 2645fea9bcedSJohannes Berg list_for_each_entry_safe(reg_beacon, btmp, ®_pending_beacons, list) { 264609d989d1SLuis R. Rodriguez list_del(®_beacon->list); 264709d989d1SLuis R. Rodriguez kfree(reg_beacon); 264809d989d1SLuis R. Rodriguez } 264909d989d1SLuis R. Rodriguez spin_unlock_bh(®_pending_beacons_lock); 265009d989d1SLuis R. Rodriguez 2651fea9bcedSJohannes Berg list_for_each_entry_safe(reg_beacon, btmp, ®_beacon_list, list) { 265209d989d1SLuis R. Rodriguez list_del(®_beacon->list); 265309d989d1SLuis R. Rodriguez kfree(reg_beacon); 265409d989d1SLuis R. Rodriguez } 265509d989d1SLuis R. Rodriguez 265609d989d1SLuis R. Rodriguez /* First restore to the basic regulatory settings */ 2657379b82f4SJohannes Berg world_alpha2[0] = cfg80211_world_regdom->alpha2[0]; 2658379b82f4SJohannes Berg world_alpha2[1] = cfg80211_world_regdom->alpha2[1]; 265909d989d1SLuis R. Rodriguez 26605ce543d1SRajkumar Manoharan list_for_each_entry(rdev, &cfg80211_rdev_list, list) { 2661b0d7aa59SJonathan Doron if (rdev->wiphy.regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) 2662b0d7aa59SJonathan Doron continue; 2663a2f73b6cSLuis R. Rodriguez if (rdev->wiphy.regulatory_flags & REGULATORY_CUSTOM_REG) 26645ce543d1SRajkumar Manoharan restore_custom_reg_settings(&rdev->wiphy); 26655ce543d1SRajkumar Manoharan } 26665ce543d1SRajkumar Manoharan 2667cee0bec5SDmitry Shmidt regulatory_hint_core(world_alpha2); 266809d989d1SLuis R. Rodriguez 266909d989d1SLuis R. Rodriguez /* 267009d989d1SLuis R. Rodriguez * This restores the ieee80211_regdom module parameter 267109d989d1SLuis R. Rodriguez * preference or the last user requested regulatory 267209d989d1SLuis R. Rodriguez * settings, user regulatory settings takes precedence. 267309d989d1SLuis R. Rodriguez */ 267409d989d1SLuis R. Rodriguez if (is_an_alpha2(alpha2)) 2675549cc1c5SMaciej S. Szmigiero regulatory_hint_user(alpha2, NL80211_USER_REG_HINT_USER); 267609d989d1SLuis R. Rodriguez 267714609555SLuis R. Rodriguez spin_lock(®_requests_lock); 267811cff96cSJohannes Berg list_splice_tail_init(&tmp_reg_req_list, ®_requests_list); 267914609555SLuis R. Rodriguez spin_unlock(®_requests_lock); 268014609555SLuis R. Rodriguez 268114609555SLuis R. Rodriguez REG_DBG_PRINT("Kicking the queue\n"); 268214609555SLuis R. Rodriguez 268314609555SLuis R. Rodriguez schedule_work(®_work); 268414609555SLuis R. Rodriguez } 268509d989d1SLuis R. Rodriguez 268609d989d1SLuis R. Rodriguez void regulatory_hint_disconnect(void) 268709d989d1SLuis R. Rodriguez { 26881a919318SJohannes Berg REG_DBG_PRINT("All devices are disconnected, going to restore regulatory settings\n"); 268909d989d1SLuis R. Rodriguez restore_regulatory_settings(false); 269009d989d1SLuis R. Rodriguez } 269109d989d1SLuis R. Rodriguez 2692e38f8a7aSLuis R. Rodriguez static bool freq_is_chan_12_13_14(u16 freq) 2693e38f8a7aSLuis R. Rodriguez { 269459eb21a6SBruno Randolf if (freq == ieee80211_channel_to_frequency(12, IEEE80211_BAND_2GHZ) || 269559eb21a6SBruno Randolf freq == ieee80211_channel_to_frequency(13, IEEE80211_BAND_2GHZ) || 269659eb21a6SBruno Randolf freq == ieee80211_channel_to_frequency(14, IEEE80211_BAND_2GHZ)) 2697e38f8a7aSLuis R. Rodriguez return true; 2698e38f8a7aSLuis R. Rodriguez return false; 2699e38f8a7aSLuis R. Rodriguez } 2700e38f8a7aSLuis R. Rodriguez 27013ebfa6e7SLuis R. Rodriguez static bool pending_reg_beacon(struct ieee80211_channel *beacon_chan) 27023ebfa6e7SLuis R. Rodriguez { 27033ebfa6e7SLuis R. Rodriguez struct reg_beacon *pending_beacon; 27043ebfa6e7SLuis R. Rodriguez 27053ebfa6e7SLuis R. Rodriguez list_for_each_entry(pending_beacon, ®_pending_beacons, list) 27063ebfa6e7SLuis R. Rodriguez if (beacon_chan->center_freq == 27073ebfa6e7SLuis R. Rodriguez pending_beacon->chan.center_freq) 27083ebfa6e7SLuis R. Rodriguez return true; 27093ebfa6e7SLuis R. Rodriguez return false; 27103ebfa6e7SLuis R. Rodriguez } 27113ebfa6e7SLuis R. Rodriguez 2712e38f8a7aSLuis R. Rodriguez int regulatory_hint_found_beacon(struct wiphy *wiphy, 2713e38f8a7aSLuis R. Rodriguez struct ieee80211_channel *beacon_chan, 2714e38f8a7aSLuis R. Rodriguez gfp_t gfp) 2715e38f8a7aSLuis R. Rodriguez { 2716e38f8a7aSLuis R. Rodriguez struct reg_beacon *reg_beacon; 27173ebfa6e7SLuis R. Rodriguez bool processing; 2718e38f8a7aSLuis R. Rodriguez 27191a919318SJohannes Berg if (beacon_chan->beacon_found || 27201a919318SJohannes Berg beacon_chan->flags & IEEE80211_CHAN_RADAR || 2721e38f8a7aSLuis R. Rodriguez (beacon_chan->band == IEEE80211_BAND_2GHZ && 27221a919318SJohannes Berg !freq_is_chan_12_13_14(beacon_chan->center_freq))) 2723e38f8a7aSLuis R. Rodriguez return 0; 2724e38f8a7aSLuis R. Rodriguez 27253ebfa6e7SLuis R. Rodriguez spin_lock_bh(®_pending_beacons_lock); 27263ebfa6e7SLuis R. Rodriguez processing = pending_reg_beacon(beacon_chan); 27273ebfa6e7SLuis R. Rodriguez spin_unlock_bh(®_pending_beacons_lock); 27283ebfa6e7SLuis R. Rodriguez 27293ebfa6e7SLuis R. Rodriguez if (processing) 2730e38f8a7aSLuis R. Rodriguez return 0; 2731e38f8a7aSLuis R. Rodriguez 2732e38f8a7aSLuis R. Rodriguez reg_beacon = kzalloc(sizeof(struct reg_beacon), gfp); 2733e38f8a7aSLuis R. Rodriguez if (!reg_beacon) 2734e38f8a7aSLuis R. Rodriguez return -ENOMEM; 2735e38f8a7aSLuis R. Rodriguez 27361a919318SJohannes Berg REG_DBG_PRINT("Found new beacon on frequency: %d MHz (Ch %d) on %s\n", 2737e38f8a7aSLuis R. Rodriguez beacon_chan->center_freq, 2738e38f8a7aSLuis R. Rodriguez ieee80211_frequency_to_channel(beacon_chan->center_freq), 2739e38f8a7aSLuis R. Rodriguez wiphy_name(wiphy)); 27404113f751SLuis R. Rodriguez 2741e38f8a7aSLuis R. Rodriguez memcpy(®_beacon->chan, beacon_chan, 2742e38f8a7aSLuis R. Rodriguez sizeof(struct ieee80211_channel)); 2743e38f8a7aSLuis R. Rodriguez 2744e38f8a7aSLuis R. Rodriguez /* 2745e38f8a7aSLuis R. Rodriguez * Since we can be called from BH or and non-BH context 2746e38f8a7aSLuis R. Rodriguez * we must use spin_lock_bh() 2747e38f8a7aSLuis R. Rodriguez */ 2748e38f8a7aSLuis R. Rodriguez spin_lock_bh(®_pending_beacons_lock); 2749e38f8a7aSLuis R. Rodriguez list_add_tail(®_beacon->list, ®_pending_beacons); 2750e38f8a7aSLuis R. Rodriguez spin_unlock_bh(®_pending_beacons_lock); 2751e38f8a7aSLuis R. Rodriguez 2752e38f8a7aSLuis R. Rodriguez schedule_work(®_work); 2753e38f8a7aSLuis R. Rodriguez 2754e38f8a7aSLuis R. Rodriguez return 0; 2755e38f8a7aSLuis R. Rodriguez } 2756e38f8a7aSLuis R. Rodriguez 2757a3d2eaf0SJohannes Berg static void print_rd_rules(const struct ieee80211_regdomain *rd) 2758b2e1b302SLuis R. Rodriguez { 2759b2e1b302SLuis R. Rodriguez unsigned int i; 2760a3d2eaf0SJohannes Berg const struct ieee80211_reg_rule *reg_rule = NULL; 2761a3d2eaf0SJohannes Berg const struct ieee80211_freq_range *freq_range = NULL; 2762a3d2eaf0SJohannes Berg const struct ieee80211_power_rule *power_rule = NULL; 2763089027e5SJanusz Dziedzic char bw[32], cac_time[32]; 2764b2e1b302SLuis R. Rodriguez 2765089027e5SJanusz Dziedzic pr_info(" (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp), (dfs_cac_time)\n"); 2766b2e1b302SLuis R. Rodriguez 2767b2e1b302SLuis R. Rodriguez for (i = 0; i < rd->n_reg_rules; i++) { 2768b2e1b302SLuis R. Rodriguez reg_rule = &rd->reg_rules[i]; 2769b2e1b302SLuis R. Rodriguez freq_range = ®_rule->freq_range; 2770b2e1b302SLuis R. Rodriguez power_rule = ®_rule->power_rule; 2771b2e1b302SLuis R. Rodriguez 2772b0dfd2eaSJanusz Dziedzic if (reg_rule->flags & NL80211_RRF_AUTO_BW) 2773b0dfd2eaSJanusz Dziedzic snprintf(bw, sizeof(bw), "%d KHz, %d KHz AUTO", 2774b0dfd2eaSJanusz Dziedzic freq_range->max_bandwidth_khz, 277597524820SJanusz Dziedzic reg_get_max_bandwidth(rd, reg_rule)); 277697524820SJanusz Dziedzic else 2777b0dfd2eaSJanusz Dziedzic snprintf(bw, sizeof(bw), "%d KHz", 277897524820SJanusz Dziedzic freq_range->max_bandwidth_khz); 277997524820SJanusz Dziedzic 2780089027e5SJanusz Dziedzic if (reg_rule->flags & NL80211_RRF_DFS) 2781089027e5SJanusz Dziedzic scnprintf(cac_time, sizeof(cac_time), "%u s", 2782089027e5SJanusz Dziedzic reg_rule->dfs_cac_ms/1000); 2783089027e5SJanusz Dziedzic else 2784089027e5SJanusz Dziedzic scnprintf(cac_time, sizeof(cac_time), "N/A"); 2785089027e5SJanusz Dziedzic 2786089027e5SJanusz Dziedzic 2787fb1fc7adSLuis R. Rodriguez /* 2788fb1fc7adSLuis R. Rodriguez * There may not be documentation for max antenna gain 2789fb1fc7adSLuis R. Rodriguez * in certain regions 2790fb1fc7adSLuis R. Rodriguez */ 2791b2e1b302SLuis R. Rodriguez if (power_rule->max_antenna_gain) 2792089027e5SJanusz Dziedzic pr_info(" (%d KHz - %d KHz @ %s), (%d mBi, %d mBm), (%s)\n", 2793b2e1b302SLuis R. Rodriguez freq_range->start_freq_khz, 2794b2e1b302SLuis R. Rodriguez freq_range->end_freq_khz, 279597524820SJanusz Dziedzic bw, 2796b2e1b302SLuis R. Rodriguez power_rule->max_antenna_gain, 2797089027e5SJanusz Dziedzic power_rule->max_eirp, 2798089027e5SJanusz Dziedzic cac_time); 2799b2e1b302SLuis R. Rodriguez else 2800089027e5SJanusz Dziedzic pr_info(" (%d KHz - %d KHz @ %s), (N/A, %d mBm), (%s)\n", 2801b2e1b302SLuis R. Rodriguez freq_range->start_freq_khz, 2802b2e1b302SLuis R. Rodriguez freq_range->end_freq_khz, 280397524820SJanusz Dziedzic bw, 2804089027e5SJanusz Dziedzic power_rule->max_eirp, 2805089027e5SJanusz Dziedzic cac_time); 2806b2e1b302SLuis R. Rodriguez } 2807b2e1b302SLuis R. Rodriguez } 2808b2e1b302SLuis R. Rodriguez 28094c7d3982SLuis R. Rodriguez bool reg_supported_dfs_region(enum nl80211_dfs_regions dfs_region) 28108b60b078SLuis R. Rodriguez { 28118b60b078SLuis R. Rodriguez switch (dfs_region) { 28128b60b078SLuis R. Rodriguez case NL80211_DFS_UNSET: 28138b60b078SLuis R. Rodriguez case NL80211_DFS_FCC: 28148b60b078SLuis R. Rodriguez case NL80211_DFS_ETSI: 28158b60b078SLuis R. Rodriguez case NL80211_DFS_JP: 28168b60b078SLuis R. Rodriguez return true; 28178b60b078SLuis R. Rodriguez default: 28188b60b078SLuis R. Rodriguez REG_DBG_PRINT("Ignoring uknown DFS master region: %d\n", 28198b60b078SLuis R. Rodriguez dfs_region); 28208b60b078SLuis R. Rodriguez return false; 28218b60b078SLuis R. Rodriguez } 28228b60b078SLuis R. Rodriguez } 28238b60b078SLuis R. Rodriguez 2824a3d2eaf0SJohannes Berg static void print_regdomain(const struct ieee80211_regdomain *rd) 2825b2e1b302SLuis R. Rodriguez { 2826c492db37SJohannes Berg struct regulatory_request *lr = get_last_request(); 2827b2e1b302SLuis R. Rodriguez 28283f2355cbSLuis R. Rodriguez if (is_intersected_alpha2(rd->alpha2)) { 2829c492db37SJohannes Berg if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) { 283079c97e97SJohannes Berg struct cfg80211_registered_device *rdev; 2831c492db37SJohannes Berg rdev = cfg80211_rdev_by_wiphy_idx(lr->wiphy_idx); 283279c97e97SJohannes Berg if (rdev) { 2833e9c0268fSJoe Perches pr_info("Current regulatory domain updated by AP to: %c%c\n", 283479c97e97SJohannes Berg rdev->country_ie_alpha2[0], 283579c97e97SJohannes Berg rdev->country_ie_alpha2[1]); 28363f2355cbSLuis R. Rodriguez } else 2837e9c0268fSJoe Perches pr_info("Current regulatory domain intersected:\n"); 28383f2355cbSLuis R. Rodriguez } else 2839e9c0268fSJoe Perches pr_info("Current regulatory domain intersected:\n"); 28401a919318SJohannes Berg } else if (is_world_regdom(rd->alpha2)) { 2841e9c0268fSJoe Perches pr_info("World regulatory domain updated:\n"); 28421a919318SJohannes Berg } else { 2843b2e1b302SLuis R. Rodriguez if (is_unknown_alpha2(rd->alpha2)) 2844e9c0268fSJoe Perches pr_info("Regulatory domain changed to driver built-in settings (unknown country)\n"); 284557b5ce07SLuis R. Rodriguez else { 2846c492db37SJohannes Berg if (reg_request_cell_base(lr)) 28471a919318SJohannes Berg pr_info("Regulatory domain changed to country: %c%c by Cell Station\n", 2848b2e1b302SLuis R. Rodriguez rd->alpha2[0], rd->alpha2[1]); 284957b5ce07SLuis R. Rodriguez else 28501a919318SJohannes Berg pr_info("Regulatory domain changed to country: %c%c\n", 285157b5ce07SLuis R. Rodriguez rd->alpha2[0], rd->alpha2[1]); 285257b5ce07SLuis R. Rodriguez } 2853b2e1b302SLuis R. Rodriguez } 28541a919318SJohannes Berg 28553ef121b5SLuis R. Rodriguez pr_info(" DFS Master region: %s", reg_dfs_region_str(rd->dfs_region)); 2856b2e1b302SLuis R. Rodriguez print_rd_rules(rd); 2857b2e1b302SLuis R. Rodriguez } 2858b2e1b302SLuis R. Rodriguez 28592df78167SJohannes Berg static void print_regdomain_info(const struct ieee80211_regdomain *rd) 2860b2e1b302SLuis R. Rodriguez { 2861e9c0268fSJoe Perches pr_info("Regulatory domain: %c%c\n", rd->alpha2[0], rd->alpha2[1]); 2862b2e1b302SLuis R. Rodriguez print_rd_rules(rd); 2863b2e1b302SLuis R. Rodriguez } 2864b2e1b302SLuis R. Rodriguez 28653b9e5acaSLuis R. Rodriguez static int reg_set_rd_core(const struct ieee80211_regdomain *rd) 28663b9e5acaSLuis R. Rodriguez { 28673b9e5acaSLuis R. Rodriguez if (!is_world_regdom(rd->alpha2)) 28683b9e5acaSLuis R. Rodriguez return -EINVAL; 28693b9e5acaSLuis R. Rodriguez update_world_regdomain(rd); 28703b9e5acaSLuis R. Rodriguez return 0; 28713b9e5acaSLuis R. Rodriguez } 28723b9e5acaSLuis R. Rodriguez 287384721d44SLuis R. Rodriguez static int reg_set_rd_user(const struct ieee80211_regdomain *rd, 287484721d44SLuis R. Rodriguez struct regulatory_request *user_request) 287584721d44SLuis R. Rodriguez { 287684721d44SLuis R. Rodriguez const struct ieee80211_regdomain *intersected_rd = NULL; 287784721d44SLuis R. Rodriguez 287884721d44SLuis R. Rodriguez if (!regdom_changes(rd->alpha2)) 287984721d44SLuis R. Rodriguez return -EALREADY; 288084721d44SLuis R. Rodriguez 288184721d44SLuis R. Rodriguez if (!is_valid_rd(rd)) { 288284721d44SLuis R. Rodriguez pr_err("Invalid regulatory domain detected:\n"); 288384721d44SLuis R. Rodriguez print_regdomain_info(rd); 288484721d44SLuis R. Rodriguez return -EINVAL; 288584721d44SLuis R. Rodriguez } 288684721d44SLuis R. Rodriguez 288784721d44SLuis R. Rodriguez if (!user_request->intersect) { 288884721d44SLuis R. Rodriguez reset_regdomains(false, rd); 288984721d44SLuis R. Rodriguez return 0; 289084721d44SLuis R. Rodriguez } 289184721d44SLuis R. Rodriguez 289284721d44SLuis R. Rodriguez intersected_rd = regdom_intersect(rd, get_cfg80211_regdom()); 289384721d44SLuis R. Rodriguez if (!intersected_rd) 289484721d44SLuis R. Rodriguez return -EINVAL; 289584721d44SLuis R. Rodriguez 289684721d44SLuis R. Rodriguez kfree(rd); 289784721d44SLuis R. Rodriguez rd = NULL; 289884721d44SLuis R. Rodriguez reset_regdomains(false, intersected_rd); 289984721d44SLuis R. Rodriguez 290084721d44SLuis R. Rodriguez return 0; 290184721d44SLuis R. Rodriguez } 290284721d44SLuis R. Rodriguez 2903f5fe3247SLuis R. Rodriguez static int reg_set_rd_driver(const struct ieee80211_regdomain *rd, 2904f5fe3247SLuis R. Rodriguez struct regulatory_request *driver_request) 2905b2e1b302SLuis R. Rodriguez { 2906e9763c3cSJohannes Berg const struct ieee80211_regdomain *regd; 29079c96477dSLuis R. Rodriguez const struct ieee80211_regdomain *intersected_rd = NULL; 2908f5fe3247SLuis R. Rodriguez const struct ieee80211_regdomain *tmp; 2909806a9e39SLuis R. Rodriguez struct wiphy *request_wiphy; 29106913b49aSJohannes Berg 2911f5fe3247SLuis R. Rodriguez if (is_world_regdom(rd->alpha2)) 2912b2e1b302SLuis R. Rodriguez return -EINVAL; 2913b2e1b302SLuis R. Rodriguez 2914baeb66feSJohn W. Linville if (!regdom_changes(rd->alpha2)) 291595908535SKalle Valo return -EALREADY; 2916b2e1b302SLuis R. Rodriguez 2917b2e1b302SLuis R. Rodriguez if (!is_valid_rd(rd)) { 2918e9c0268fSJoe Perches pr_err("Invalid regulatory domain detected:\n"); 2919b2e1b302SLuis R. Rodriguez print_regdomain_info(rd); 2920b2e1b302SLuis R. Rodriguez return -EINVAL; 2921b2e1b302SLuis R. Rodriguez } 2922b2e1b302SLuis R. Rodriguez 2923f5fe3247SLuis R. Rodriguez request_wiphy = wiphy_idx_to_wiphy(driver_request->wiphy_idx); 2924922ec58cSJohannes Berg if (!request_wiphy) 2925de3584bdSJohannes Berg return -ENODEV; 2926806a9e39SLuis R. Rodriguez 2927f5fe3247SLuis R. Rodriguez if (!driver_request->intersect) { 2928558f6d32SLuis R. Rodriguez if (request_wiphy->regd) 2929558f6d32SLuis R. Rodriguez return -EALREADY; 29303e0c3ff3SLuis R. Rodriguez 2931e9763c3cSJohannes Berg regd = reg_copy_regd(rd); 2932e9763c3cSJohannes Berg if (IS_ERR(regd)) 2933e9763c3cSJohannes Berg return PTR_ERR(regd); 29343e0c3ff3SLuis R. Rodriguez 2935458f4f9eSJohannes Berg rcu_assign_pointer(request_wiphy->regd, regd); 2936379b82f4SJohannes Berg reset_regdomains(false, rd); 2937b8295acdSLuis R. Rodriguez return 0; 2938b8295acdSLuis R. Rodriguez } 2939b8295acdSLuis R. Rodriguez 2940458f4f9eSJohannes Berg intersected_rd = regdom_intersect(rd, get_cfg80211_regdom()); 29419c96477dSLuis R. Rodriguez if (!intersected_rd) 29429c96477dSLuis R. Rodriguez return -EINVAL; 2943b8295acdSLuis R. Rodriguez 2944fb1fc7adSLuis R. Rodriguez /* 2945fb1fc7adSLuis R. Rodriguez * We can trash what CRDA provided now. 29463e0c3ff3SLuis R. Rodriguez * However if a driver requested this specific regulatory 2947fb1fc7adSLuis R. Rodriguez * domain we keep it for its private use 2948fb1fc7adSLuis R. Rodriguez */ 2949b7566fc3SLarry Finger tmp = get_wiphy_regdom(request_wiphy); 2950458f4f9eSJohannes Berg rcu_assign_pointer(request_wiphy->regd, rd); 2951b7566fc3SLarry Finger rcu_free_regdom(tmp); 29523e0c3ff3SLuis R. Rodriguez 2953b8295acdSLuis R. Rodriguez rd = NULL; 2954b8295acdSLuis R. Rodriguez 2955379b82f4SJohannes Berg reset_regdomains(false, intersected_rd); 2956b8295acdSLuis R. Rodriguez 2957b8295acdSLuis R. Rodriguez return 0; 29589c96477dSLuis R. Rodriguez } 29599c96477dSLuis R. Rodriguez 296001992406SLuis R. Rodriguez static int reg_set_rd_country_ie(const struct ieee80211_regdomain *rd, 296101992406SLuis R. Rodriguez struct regulatory_request *country_ie_request) 2962f5fe3247SLuis R. Rodriguez { 2963f5fe3247SLuis R. Rodriguez struct wiphy *request_wiphy; 2964f5fe3247SLuis R. Rodriguez 2965f5fe3247SLuis R. Rodriguez if (!is_alpha2_set(rd->alpha2) && !is_an_alpha2(rd->alpha2) && 2966f5fe3247SLuis R. Rodriguez !is_unknown_alpha2(rd->alpha2)) 2967f5fe3247SLuis R. Rodriguez return -EINVAL; 2968f5fe3247SLuis R. Rodriguez 2969f5fe3247SLuis R. Rodriguez /* 2970f5fe3247SLuis R. Rodriguez * Lets only bother proceeding on the same alpha2 if the current 2971f5fe3247SLuis R. Rodriguez * rd is non static (it means CRDA was present and was used last) 2972f5fe3247SLuis R. Rodriguez * and the pending request came in from a country IE 2973f5fe3247SLuis R. Rodriguez */ 2974f5fe3247SLuis R. Rodriguez 2975f5fe3247SLuis R. Rodriguez if (!is_valid_rd(rd)) { 2976f5fe3247SLuis R. Rodriguez pr_err("Invalid regulatory domain detected:\n"); 2977f5fe3247SLuis R. Rodriguez print_regdomain_info(rd); 29783f2355cbSLuis R. Rodriguez return -EINVAL; 2979b2e1b302SLuis R. Rodriguez } 2980b2e1b302SLuis R. Rodriguez 298101992406SLuis R. Rodriguez request_wiphy = wiphy_idx_to_wiphy(country_ie_request->wiphy_idx); 2982922ec58cSJohannes Berg if (!request_wiphy) 2983f5fe3247SLuis R. Rodriguez return -ENODEV; 2984f5fe3247SLuis R. Rodriguez 298501992406SLuis R. Rodriguez if (country_ie_request->intersect) 2986f5fe3247SLuis R. Rodriguez return -EINVAL; 2987f5fe3247SLuis R. Rodriguez 2988f5fe3247SLuis R. Rodriguez reset_regdomains(false, rd); 2989f5fe3247SLuis R. Rodriguez return 0; 2990f5fe3247SLuis R. Rodriguez } 2991b2e1b302SLuis R. Rodriguez 2992fb1fc7adSLuis R. Rodriguez /* 2993fb1fc7adSLuis R. Rodriguez * Use this call to set the current regulatory domain. Conflicts with 2994b2e1b302SLuis R. Rodriguez * multiple drivers can be ironed out later. Caller must've already 2995458f4f9eSJohannes Berg * kmalloc'd the rd structure. 2996fb1fc7adSLuis R. Rodriguez */ 2997c37722bdSIlan peer int set_regdom(const struct ieee80211_regdomain *rd, 2998c37722bdSIlan peer enum ieee80211_regd_source regd_src) 2999b2e1b302SLuis R. Rodriguez { 3000c492db37SJohannes Berg struct regulatory_request *lr; 3001092008abSJanusz Dziedzic bool user_reset = false; 3002b2e1b302SLuis R. Rodriguez int r; 3003b2e1b302SLuis R. Rodriguez 30043b9e5acaSLuis R. Rodriguez if (!reg_is_valid_request(rd->alpha2)) { 30053b9e5acaSLuis R. Rodriguez kfree(rd); 30063b9e5acaSLuis R. Rodriguez return -EINVAL; 30073b9e5acaSLuis R. Rodriguez } 30083b9e5acaSLuis R. Rodriguez 3009c37722bdSIlan peer if (regd_src == REGD_SOURCE_CRDA) 3010b6863036SJohannes Berg reset_crda_timeouts(); 3011c37722bdSIlan peer 3012c492db37SJohannes Berg lr = get_last_request(); 3013abc7381bSLuis R. Rodriguez 3014b2e1b302SLuis R. Rodriguez /* Note that this doesn't update the wiphys, this is done below */ 30153b9e5acaSLuis R. Rodriguez switch (lr->initiator) { 30163b9e5acaSLuis R. Rodriguez case NL80211_REGDOM_SET_BY_CORE: 30173b9e5acaSLuis R. Rodriguez r = reg_set_rd_core(rd); 30183b9e5acaSLuis R. Rodriguez break; 30193b9e5acaSLuis R. Rodriguez case NL80211_REGDOM_SET_BY_USER: 302084721d44SLuis R. Rodriguez r = reg_set_rd_user(rd, lr); 3021092008abSJanusz Dziedzic user_reset = true; 302284721d44SLuis R. Rodriguez break; 30233b9e5acaSLuis R. Rodriguez case NL80211_REGDOM_SET_BY_DRIVER: 3024f5fe3247SLuis R. Rodriguez r = reg_set_rd_driver(rd, lr); 3025f5fe3247SLuis R. Rodriguez break; 30263b9e5acaSLuis R. Rodriguez case NL80211_REGDOM_SET_BY_COUNTRY_IE: 302701992406SLuis R. Rodriguez r = reg_set_rd_country_ie(rd, lr); 30283b9e5acaSLuis R. Rodriguez break; 30293b9e5acaSLuis R. Rodriguez default: 30303b9e5acaSLuis R. Rodriguez WARN(1, "invalid initiator %d\n", lr->initiator); 30313b9e5acaSLuis R. Rodriguez return -EINVAL; 30323b9e5acaSLuis R. Rodriguez } 30333b9e5acaSLuis R. Rodriguez 3034d2372b31SJohannes Berg if (r) { 3035092008abSJanusz Dziedzic switch (r) { 3036092008abSJanusz Dziedzic case -EALREADY: 303795908535SKalle Valo reg_set_request_processed(); 3038092008abSJanusz Dziedzic break; 3039092008abSJanusz Dziedzic default: 3040092008abSJanusz Dziedzic /* Back to world regulatory in case of errors */ 3041092008abSJanusz Dziedzic restore_regulatory_settings(user_reset); 3042092008abSJanusz Dziedzic } 304395908535SKalle Valo 3044d2372b31SJohannes Berg kfree(rd); 304538fd2143SJohannes Berg return r; 3046d2372b31SJohannes Berg } 3047b2e1b302SLuis R. Rodriguez 3048b2e1b302SLuis R. Rodriguez /* This would make this whole thing pointless */ 304938fd2143SJohannes Berg if (WARN_ON(!lr->intersect && rd != get_cfg80211_regdom())) 305038fd2143SJohannes Berg return -EINVAL; 3051b2e1b302SLuis R. Rodriguez 3052b2e1b302SLuis R. Rodriguez /* update all wiphys now with the new established regulatory domain */ 3053c492db37SJohannes Berg update_all_wiphy_regulatory(lr->initiator); 3054b2e1b302SLuis R. Rodriguez 3055458f4f9eSJohannes Berg print_regdomain(get_cfg80211_regdom()); 3056b2e1b302SLuis R. Rodriguez 3057c492db37SJohannes Berg nl80211_send_reg_change_event(lr); 305873d54c9eSLuis R. Rodriguez 3059b2e253cfSLuis R. Rodriguez reg_set_request_processed(); 3060b2e253cfSLuis R. Rodriguez 306138fd2143SJohannes Berg return 0; 3062b2e1b302SLuis R. Rodriguez } 3063b2e1b302SLuis R. Rodriguez 30642c3e861cSArik Nemtsov static int __regulatory_set_wiphy_regd(struct wiphy *wiphy, 3065b0d7aa59SJonathan Doron struct ieee80211_regdomain *rd) 3066b0d7aa59SJonathan Doron { 3067b0d7aa59SJonathan Doron const struct ieee80211_regdomain *regd; 3068b0d7aa59SJonathan Doron const struct ieee80211_regdomain *prev_regd; 3069b0d7aa59SJonathan Doron struct cfg80211_registered_device *rdev; 3070b0d7aa59SJonathan Doron 3071b0d7aa59SJonathan Doron if (WARN_ON(!wiphy || !rd)) 3072b0d7aa59SJonathan Doron return -EINVAL; 3073b0d7aa59SJonathan Doron 3074b0d7aa59SJonathan Doron if (WARN(!(wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED), 3075b0d7aa59SJonathan Doron "wiphy should have REGULATORY_WIPHY_SELF_MANAGED\n")) 3076b0d7aa59SJonathan Doron return -EPERM; 3077b0d7aa59SJonathan Doron 3078b0d7aa59SJonathan Doron if (WARN(!is_valid_rd(rd), "Invalid regulatory domain detected\n")) { 3079b0d7aa59SJonathan Doron print_regdomain_info(rd); 3080b0d7aa59SJonathan Doron return -EINVAL; 3081b0d7aa59SJonathan Doron } 3082b0d7aa59SJonathan Doron 3083b0d7aa59SJonathan Doron regd = reg_copy_regd(rd); 3084b0d7aa59SJonathan Doron if (IS_ERR(regd)) 3085b0d7aa59SJonathan Doron return PTR_ERR(regd); 3086b0d7aa59SJonathan Doron 3087b0d7aa59SJonathan Doron rdev = wiphy_to_rdev(wiphy); 3088b0d7aa59SJonathan Doron 3089b0d7aa59SJonathan Doron spin_lock(®_requests_lock); 3090b0d7aa59SJonathan Doron prev_regd = rdev->requested_regd; 3091b0d7aa59SJonathan Doron rdev->requested_regd = regd; 3092b0d7aa59SJonathan Doron spin_unlock(®_requests_lock); 3093b0d7aa59SJonathan Doron 3094b0d7aa59SJonathan Doron kfree(prev_regd); 30952c3e861cSArik Nemtsov return 0; 30962c3e861cSArik Nemtsov } 30972c3e861cSArik Nemtsov 30982c3e861cSArik Nemtsov int regulatory_set_wiphy_regd(struct wiphy *wiphy, 30992c3e861cSArik Nemtsov struct ieee80211_regdomain *rd) 31002c3e861cSArik Nemtsov { 31012c3e861cSArik Nemtsov int ret = __regulatory_set_wiphy_regd(wiphy, rd); 31022c3e861cSArik Nemtsov 31032c3e861cSArik Nemtsov if (ret) 31042c3e861cSArik Nemtsov return ret; 3105b0d7aa59SJonathan Doron 3106b0d7aa59SJonathan Doron schedule_work(®_work); 3107b0d7aa59SJonathan Doron return 0; 3108b0d7aa59SJonathan Doron } 3109b0d7aa59SJonathan Doron EXPORT_SYMBOL(regulatory_set_wiphy_regd); 3110b0d7aa59SJonathan Doron 31112c3e861cSArik Nemtsov int regulatory_set_wiphy_regd_sync_rtnl(struct wiphy *wiphy, 31122c3e861cSArik Nemtsov struct ieee80211_regdomain *rd) 31132c3e861cSArik Nemtsov { 31142c3e861cSArik Nemtsov int ret; 31152c3e861cSArik Nemtsov 31162c3e861cSArik Nemtsov ASSERT_RTNL(); 31172c3e861cSArik Nemtsov 31182c3e861cSArik Nemtsov ret = __regulatory_set_wiphy_regd(wiphy, rd); 31192c3e861cSArik Nemtsov if (ret) 31202c3e861cSArik Nemtsov return ret; 31212c3e861cSArik Nemtsov 31222c3e861cSArik Nemtsov /* process the request immediately */ 31232c3e861cSArik Nemtsov reg_process_self_managed_hints(); 31242c3e861cSArik Nemtsov return 0; 31252c3e861cSArik Nemtsov } 31262c3e861cSArik Nemtsov EXPORT_SYMBOL(regulatory_set_wiphy_regd_sync_rtnl); 31272c3e861cSArik Nemtsov 312857b5ce07SLuis R. Rodriguez void wiphy_regulatory_register(struct wiphy *wiphy) 312957b5ce07SLuis R. Rodriguez { 313023df0b73SArik Nemtsov struct regulatory_request *lr; 313123df0b73SArik Nemtsov 3132b0d7aa59SJonathan Doron /* self-managed devices ignore external hints */ 3133b0d7aa59SJonathan Doron if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) 3134b0d7aa59SJonathan Doron wiphy->regulatory_flags |= REGULATORY_DISABLE_BEACON_HINTS | 3135b0d7aa59SJonathan Doron REGULATORY_COUNTRY_IE_IGNORE; 3136b0d7aa59SJonathan Doron 313757b5ce07SLuis R. Rodriguez if (!reg_dev_ignore_cell_hint(wiphy)) 313857b5ce07SLuis R. Rodriguez reg_num_devs_support_basehint++; 313957b5ce07SLuis R. Rodriguez 314023df0b73SArik Nemtsov lr = get_last_request(); 314123df0b73SArik Nemtsov wiphy_update_regulatory(wiphy, lr->initiator); 314257b5ce07SLuis R. Rodriguez } 314357b5ce07SLuis R. Rodriguez 3144bfead080SLuis R. Rodriguez void wiphy_regulatory_deregister(struct wiphy *wiphy) 31453f2355cbSLuis R. Rodriguez { 31460ad8acafSLuis R. Rodriguez struct wiphy *request_wiphy = NULL; 3147c492db37SJohannes Berg struct regulatory_request *lr; 3148761cf7ecSLuis R. Rodriguez 3149c492db37SJohannes Berg lr = get_last_request(); 3150abc7381bSLuis R. Rodriguez 315157b5ce07SLuis R. Rodriguez if (!reg_dev_ignore_cell_hint(wiphy)) 315257b5ce07SLuis R. Rodriguez reg_num_devs_support_basehint--; 315357b5ce07SLuis R. Rodriguez 3154458f4f9eSJohannes Berg rcu_free_regdom(get_wiphy_regdom(wiphy)); 315534dd886cSMonam Agarwal RCU_INIT_POINTER(wiphy->regd, NULL); 31560ef9ccddSChris Wright 3157c492db37SJohannes Berg if (lr) 3158c492db37SJohannes Berg request_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx); 3159806a9e39SLuis R. Rodriguez 31600ef9ccddSChris Wright if (!request_wiphy || request_wiphy != wiphy) 316138fd2143SJohannes Berg return; 31620ef9ccddSChris Wright 3163c492db37SJohannes Berg lr->wiphy_idx = WIPHY_IDX_INVALID; 3164c492db37SJohannes Berg lr->country_ie_env = ENVIRON_ANY; 31653f2355cbSLuis R. Rodriguez } 31663f2355cbSLuis R. Rodriguez 3167174e0cd2SIlan Peer /* 3168174e0cd2SIlan Peer * See http://www.fcc.gov/document/5-ghz-unlicensed-spectrum-unii, for 3169174e0cd2SIlan Peer * UNII band definitions 3170174e0cd2SIlan Peer */ 3171174e0cd2SIlan Peer int cfg80211_get_unii(int freq) 3172174e0cd2SIlan Peer { 3173174e0cd2SIlan Peer /* UNII-1 */ 3174174e0cd2SIlan Peer if (freq >= 5150 && freq <= 5250) 3175174e0cd2SIlan Peer return 0; 3176174e0cd2SIlan Peer 3177174e0cd2SIlan Peer /* UNII-2A */ 3178174e0cd2SIlan Peer if (freq > 5250 && freq <= 5350) 3179174e0cd2SIlan Peer return 1; 3180174e0cd2SIlan Peer 3181174e0cd2SIlan Peer /* UNII-2B */ 3182174e0cd2SIlan Peer if (freq > 5350 && freq <= 5470) 3183174e0cd2SIlan Peer return 2; 3184174e0cd2SIlan Peer 3185174e0cd2SIlan Peer /* UNII-2C */ 3186174e0cd2SIlan Peer if (freq > 5470 && freq <= 5725) 3187174e0cd2SIlan Peer return 3; 3188174e0cd2SIlan Peer 3189174e0cd2SIlan Peer /* UNII-3 */ 3190174e0cd2SIlan Peer if (freq > 5725 && freq <= 5825) 3191174e0cd2SIlan Peer return 4; 3192174e0cd2SIlan Peer 3193174e0cd2SIlan Peer return -EINVAL; 3194174e0cd2SIlan Peer } 3195174e0cd2SIlan Peer 3196c8866e55SIlan Peer bool regulatory_indoor_allowed(void) 3197c8866e55SIlan Peer { 3198c8866e55SIlan Peer return reg_is_indoor; 3199c8866e55SIlan Peer } 3200c8866e55SIlan Peer 32012fcc9f73SUwe Kleine-König int __init regulatory_init(void) 3202b2e1b302SLuis R. Rodriguez { 3203bcf4f99bSLuis R. Rodriguez int err = 0; 3204734366deSJohannes Berg 3205b2e1b302SLuis R. Rodriguez reg_pdev = platform_device_register_simple("regulatory", 0, NULL, 0); 3206b2e1b302SLuis R. Rodriguez if (IS_ERR(reg_pdev)) 3207b2e1b302SLuis R. Rodriguez return PTR_ERR(reg_pdev); 3208734366deSJohannes Berg 3209fe33eb39SLuis R. Rodriguez spin_lock_init(®_requests_lock); 3210e38f8a7aSLuis R. Rodriguez spin_lock_init(®_pending_beacons_lock); 321105050753SIlan peer spin_lock_init(®_indoor_lock); 3212fe33eb39SLuis R. Rodriguez 321380007efeSLuis R. Rodriguez reg_regdb_size_check(); 321480007efeSLuis R. Rodriguez 3215458f4f9eSJohannes Berg rcu_assign_pointer(cfg80211_regdomain, cfg80211_world_regdom); 3216734366deSJohannes Berg 321709d989d1SLuis R. Rodriguez user_alpha2[0] = '9'; 321809d989d1SLuis R. Rodriguez user_alpha2[1] = '7'; 321909d989d1SLuis R. Rodriguez 3220ae9e4b0dSLuis R. Rodriguez /* We always try to get an update for the static regdomain */ 3221458f4f9eSJohannes Berg err = regulatory_hint_core(cfg80211_world_regdom->alpha2); 3222bcf4f99bSLuis R. Rodriguez if (err) { 3223bcf4f99bSLuis R. Rodriguez if (err == -ENOMEM) 3224bcf4f99bSLuis R. Rodriguez return err; 3225bcf4f99bSLuis R. Rodriguez /* 3226bcf4f99bSLuis R. Rodriguez * N.B. kobject_uevent_env() can fail mainly for when we're out 3227bcf4f99bSLuis R. Rodriguez * memory which is handled and propagated appropriately above 3228bcf4f99bSLuis R. Rodriguez * but it can also fail during a netlink_broadcast() or during 3229bcf4f99bSLuis R. Rodriguez * early boot for call_usermodehelper(). For now treat these 3230bcf4f99bSLuis R. Rodriguez * errors as non-fatal. 3231bcf4f99bSLuis R. Rodriguez */ 3232e9c0268fSJoe Perches pr_err("kobject_uevent_env() was unable to call CRDA during init\n"); 3233bcf4f99bSLuis R. Rodriguez } 3234734366deSJohannes Berg 3235ae9e4b0dSLuis R. Rodriguez /* 3236ae9e4b0dSLuis R. Rodriguez * Finally, if the user set the module parameter treat it 3237ae9e4b0dSLuis R. Rodriguez * as a user hint. 3238ae9e4b0dSLuis R. Rodriguez */ 3239ae9e4b0dSLuis R. Rodriguez if (!is_world_regdom(ieee80211_regdom)) 324057b5ce07SLuis R. Rodriguez regulatory_hint_user(ieee80211_regdom, 324157b5ce07SLuis R. Rodriguez NL80211_USER_REG_HINT_USER); 3242ae9e4b0dSLuis R. Rodriguez 3243b2e1b302SLuis R. Rodriguez return 0; 3244b2e1b302SLuis R. Rodriguez } 3245b2e1b302SLuis R. Rodriguez 32461a919318SJohannes Berg void regulatory_exit(void) 3247b2e1b302SLuis R. Rodriguez { 3248fe33eb39SLuis R. Rodriguez struct regulatory_request *reg_request, *tmp; 3249e38f8a7aSLuis R. Rodriguez struct reg_beacon *reg_beacon, *btmp; 3250fe33eb39SLuis R. Rodriguez 3251fe33eb39SLuis R. Rodriguez cancel_work_sync(®_work); 3252b6863036SJohannes Berg cancel_crda_timeout_sync(); 3253ad932f04SArik Nemtsov cancel_delayed_work_sync(®_check_chans); 3254fe33eb39SLuis R. Rodriguez 32559027b149SJohannes Berg /* Lock to suppress warnings */ 325638fd2143SJohannes Berg rtnl_lock(); 3257379b82f4SJohannes Berg reset_regdomains(true, NULL); 325838fd2143SJohannes Berg rtnl_unlock(); 3259734366deSJohannes Berg 326058ebacc6SLuis R. Rodriguez dev_set_uevent_suppress(®_pdev->dev, true); 3261f6037d09SJohannes Berg 3262b2e1b302SLuis R. Rodriguez platform_device_unregister(reg_pdev); 3263734366deSJohannes Berg 3264fea9bcedSJohannes Berg list_for_each_entry_safe(reg_beacon, btmp, ®_pending_beacons, list) { 3265e38f8a7aSLuis R. Rodriguez list_del(®_beacon->list); 3266e38f8a7aSLuis R. Rodriguez kfree(reg_beacon); 3267e38f8a7aSLuis R. Rodriguez } 3268e38f8a7aSLuis R. Rodriguez 3269fea9bcedSJohannes Berg list_for_each_entry_safe(reg_beacon, btmp, ®_beacon_list, list) { 3270e38f8a7aSLuis R. Rodriguez list_del(®_beacon->list); 3271e38f8a7aSLuis R. Rodriguez kfree(reg_beacon); 3272e38f8a7aSLuis R. Rodriguez } 3273e38f8a7aSLuis R. Rodriguez 3274fea9bcedSJohannes Berg list_for_each_entry_safe(reg_request, tmp, ®_requests_list, list) { 3275fe33eb39SLuis R. Rodriguez list_del(®_request->list); 3276fe33eb39SLuis R. Rodriguez kfree(reg_request); 3277fe33eb39SLuis R. Rodriguez } 3278fe33eb39SLuis R. Rodriguez } 3279