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 138c37722bdSIlan peer /* Max number of consecutive attempts to communicate with CRDA */ 139c37722bdSIlan peer #define REG_MAX_CRDA_TIMEOUTS 10 140c37722bdSIlan peer 141c37722bdSIlan peer static u32 reg_crda_timeouts; 142c37722bdSIlan peer 143458f4f9eSJohannes Berg static const struct ieee80211_regdomain *get_cfg80211_regdom(void) 144458f4f9eSJohannes Berg { 14538fd2143SJohannes Berg return rtnl_dereference(cfg80211_regdomain); 146458f4f9eSJohannes Berg } 147458f4f9eSJohannes Berg 148ad30ca2cSArik Nemtsov const struct ieee80211_regdomain *get_wiphy_regdom(struct wiphy *wiphy) 149458f4f9eSJohannes Berg { 15038fd2143SJohannes Berg return rtnl_dereference(wiphy->regd); 151458f4f9eSJohannes Berg } 152458f4f9eSJohannes Berg 1533ef121b5SLuis R. Rodriguez static const char *reg_dfs_region_str(enum nl80211_dfs_regions dfs_region) 1543ef121b5SLuis R. Rodriguez { 1553ef121b5SLuis R. Rodriguez switch (dfs_region) { 1563ef121b5SLuis R. Rodriguez case NL80211_DFS_UNSET: 1573ef121b5SLuis R. Rodriguez return "unset"; 1583ef121b5SLuis R. Rodriguez case NL80211_DFS_FCC: 1593ef121b5SLuis R. Rodriguez return "FCC"; 1603ef121b5SLuis R. Rodriguez case NL80211_DFS_ETSI: 1613ef121b5SLuis R. Rodriguez return "ETSI"; 1623ef121b5SLuis R. Rodriguez case NL80211_DFS_JP: 1633ef121b5SLuis R. Rodriguez return "JP"; 1643ef121b5SLuis R. Rodriguez } 1653ef121b5SLuis R. Rodriguez return "Unknown"; 1663ef121b5SLuis R. Rodriguez } 1673ef121b5SLuis R. Rodriguez 1686c474799SLuis R. Rodriguez enum nl80211_dfs_regions reg_get_dfs_region(struct wiphy *wiphy) 1696c474799SLuis R. Rodriguez { 1706c474799SLuis R. Rodriguez const struct ieee80211_regdomain *regd = NULL; 1716c474799SLuis R. Rodriguez const struct ieee80211_regdomain *wiphy_regd = NULL; 1726c474799SLuis R. Rodriguez 1736c474799SLuis R. Rodriguez regd = get_cfg80211_regdom(); 1746c474799SLuis R. Rodriguez if (!wiphy) 1756c474799SLuis R. Rodriguez goto out; 1766c474799SLuis R. Rodriguez 1776c474799SLuis R. Rodriguez wiphy_regd = get_wiphy_regdom(wiphy); 1786c474799SLuis R. Rodriguez if (!wiphy_regd) 1796c474799SLuis R. Rodriguez goto out; 1806c474799SLuis R. Rodriguez 1816c474799SLuis R. Rodriguez if (wiphy_regd->dfs_region == regd->dfs_region) 1826c474799SLuis R. Rodriguez goto out; 1836c474799SLuis R. Rodriguez 1846c474799SLuis R. Rodriguez REG_DBG_PRINT("%s: device specific dfs_region " 1856c474799SLuis R. Rodriguez "(%s) disagrees with cfg80211's " 1866c474799SLuis R. Rodriguez "central dfs_region (%s)\n", 1876c474799SLuis R. Rodriguez dev_name(&wiphy->dev), 1886c474799SLuis R. Rodriguez reg_dfs_region_str(wiphy_regd->dfs_region), 1896c474799SLuis R. Rodriguez reg_dfs_region_str(regd->dfs_region)); 1906c474799SLuis R. Rodriguez 1916c474799SLuis R. Rodriguez out: 1926c474799SLuis R. Rodriguez return regd->dfs_region; 1936c474799SLuis R. Rodriguez } 1946c474799SLuis R. Rodriguez 195458f4f9eSJohannes Berg static void rcu_free_regdom(const struct ieee80211_regdomain *r) 196458f4f9eSJohannes Berg { 197458f4f9eSJohannes Berg if (!r) 198458f4f9eSJohannes Berg return; 199458f4f9eSJohannes Berg kfree_rcu((struct ieee80211_regdomain *)r, rcu_head); 200458f4f9eSJohannes Berg } 201458f4f9eSJohannes Berg 202c492db37SJohannes Berg static struct regulatory_request *get_last_request(void) 203c492db37SJohannes Berg { 20438fd2143SJohannes Berg return rcu_dereference_rtnl(last_request); 205c492db37SJohannes Berg } 206c492db37SJohannes Berg 207e38f8a7aSLuis R. Rodriguez /* Used to queue up regulatory hints */ 208fe33eb39SLuis R. Rodriguez static LIST_HEAD(reg_requests_list); 209fe33eb39SLuis R. Rodriguez static spinlock_t reg_requests_lock; 210fe33eb39SLuis R. Rodriguez 211e38f8a7aSLuis R. Rodriguez /* Used to queue up beacon hints for review */ 212e38f8a7aSLuis R. Rodriguez static LIST_HEAD(reg_pending_beacons); 213e38f8a7aSLuis R. Rodriguez static spinlock_t reg_pending_beacons_lock; 214e38f8a7aSLuis R. Rodriguez 215e38f8a7aSLuis R. Rodriguez /* Used to keep track of processed beacon hints */ 216e38f8a7aSLuis R. Rodriguez static LIST_HEAD(reg_beacon_list); 217e38f8a7aSLuis R. Rodriguez 218e38f8a7aSLuis R. Rodriguez struct reg_beacon { 219e38f8a7aSLuis R. Rodriguez struct list_head list; 220e38f8a7aSLuis R. Rodriguez struct ieee80211_channel chan; 221e38f8a7aSLuis R. Rodriguez }; 222e38f8a7aSLuis R. Rodriguez 223ad932f04SArik Nemtsov static void reg_check_chans_work(struct work_struct *work); 224ad932f04SArik Nemtsov static DECLARE_DELAYED_WORK(reg_check_chans, reg_check_chans_work); 225ad932f04SArik Nemtsov 226f333a7a2SLuis R. Rodriguez static void reg_todo(struct work_struct *work); 227f333a7a2SLuis R. Rodriguez static DECLARE_WORK(reg_work, reg_todo); 228f333a7a2SLuis R. Rodriguez 229a90c7a31SLuis R. Rodriguez static void reg_timeout_work(struct work_struct *work); 230a90c7a31SLuis R. Rodriguez static DECLARE_DELAYED_WORK(reg_timeout, reg_timeout_work); 231a90c7a31SLuis R. Rodriguez 232734366deSJohannes Berg /* We keep a static world regulatory domain in case of the absence of CRDA */ 233734366deSJohannes Berg static const struct ieee80211_regdomain world_regdom = { 23428981e5eSJason Abele .n_reg_rules = 8, 235734366deSJohannes Berg .alpha2 = "00", 236734366deSJohannes Berg .reg_rules = { 23768798a62SLuis R. Rodriguez /* IEEE 802.11b/g, channels 1..11 */ 23868798a62SLuis R. Rodriguez REG_RULE(2412-10, 2462+10, 40, 6, 20, 0), 23943c771a1SJohannes Berg /* IEEE 802.11b/g, channels 12..13. */ 24043c771a1SJohannes Berg REG_RULE(2467-10, 2472+10, 40, 6, 20, 2418fe02e16SLuis R. Rodriguez NL80211_RRF_NO_IR), 242611b6a82SLuis R. Rodriguez /* IEEE 802.11 channel 14 - Only JP enables 243611b6a82SLuis R. Rodriguez * this and for 802.11b only */ 244611b6a82SLuis R. Rodriguez REG_RULE(2484-10, 2484+10, 20, 6, 20, 2458fe02e16SLuis R. Rodriguez NL80211_RRF_NO_IR | 246611b6a82SLuis R. Rodriguez NL80211_RRF_NO_OFDM), 2473fc71f77SLuis R. Rodriguez /* IEEE 802.11a, channel 36..48 */ 248131a19bcSJohannes Berg REG_RULE(5180-10, 5240+10, 160, 6, 20, 2498fe02e16SLuis R. Rodriguez NL80211_RRF_NO_IR), 2503fc71f77SLuis R. Rodriguez 251131a19bcSJohannes Berg /* IEEE 802.11a, channel 52..64 - DFS required */ 252131a19bcSJohannes Berg REG_RULE(5260-10, 5320+10, 160, 6, 20, 2538fe02e16SLuis R. Rodriguez NL80211_RRF_NO_IR | 254131a19bcSJohannes Berg NL80211_RRF_DFS), 255131a19bcSJohannes Berg 256131a19bcSJohannes Berg /* IEEE 802.11a, channel 100..144 - DFS required */ 257131a19bcSJohannes Berg REG_RULE(5500-10, 5720+10, 160, 6, 20, 2588fe02e16SLuis R. Rodriguez NL80211_RRF_NO_IR | 259131a19bcSJohannes Berg NL80211_RRF_DFS), 2603fc71f77SLuis R. Rodriguez 2613fc71f77SLuis R. Rodriguez /* IEEE 802.11a, channel 149..165 */ 2628ab9d85cSJohannes Berg REG_RULE(5745-10, 5825+10, 80, 6, 20, 2638fe02e16SLuis R. Rodriguez NL80211_RRF_NO_IR), 26490cdc6dfSVladimir Kondratiev 2658047d261SJohannes Berg /* IEEE 802.11ad (60GHz), channels 1..3 */ 26690cdc6dfSVladimir Kondratiev REG_RULE(56160+2160*1-1080, 56160+2160*3+1080, 2160, 0, 0, 0), 267734366deSJohannes Berg } 268734366deSJohannes Berg }; 269734366deSJohannes Berg 27038fd2143SJohannes Berg /* protected by RTNL */ 271a3d2eaf0SJohannes Berg static const struct ieee80211_regdomain *cfg80211_world_regdom = 272a3d2eaf0SJohannes Berg &world_regdom; 273734366deSJohannes Berg 2746ee7d330SLuis R. Rodriguez static char *ieee80211_regdom = "00"; 27509d989d1SLuis R. Rodriguez static char user_alpha2[2]; 2766ee7d330SLuis R. Rodriguez 277734366deSJohannes Berg module_param(ieee80211_regdom, charp, 0444); 278734366deSJohannes Berg MODULE_PARM_DESC(ieee80211_regdom, "IEEE 802.11 regulatory domain code"); 279734366deSJohannes Berg 280c888393bSArik Nemtsov static void reg_free_request(struct regulatory_request *request) 2815ad6ef5eSLuis R. Rodriguez { 282c888393bSArik Nemtsov if (request != get_last_request()) 283c888393bSArik Nemtsov kfree(request); 284c888393bSArik Nemtsov } 285c888393bSArik Nemtsov 286c888393bSArik Nemtsov static void reg_free_last_request(void) 287c888393bSArik Nemtsov { 288c888393bSArik Nemtsov struct regulatory_request *lr = get_last_request(); 289c888393bSArik Nemtsov 2905ad6ef5eSLuis R. Rodriguez if (lr != &core_request_world && lr) 2915ad6ef5eSLuis R. Rodriguez kfree_rcu(lr, rcu_head); 2925ad6ef5eSLuis R. Rodriguez } 2935ad6ef5eSLuis R. Rodriguez 29405f1a3eaSLuis R. Rodriguez static void reg_update_last_request(struct regulatory_request *request) 29505f1a3eaSLuis R. Rodriguez { 296255e25b0SLuis R. Rodriguez struct regulatory_request *lr; 297255e25b0SLuis R. Rodriguez 298255e25b0SLuis R. Rodriguez lr = get_last_request(); 299255e25b0SLuis R. Rodriguez if (lr == request) 300255e25b0SLuis R. Rodriguez return; 301255e25b0SLuis R. Rodriguez 302c888393bSArik Nemtsov reg_free_last_request(); 30305f1a3eaSLuis R. Rodriguez rcu_assign_pointer(last_request, request); 30405f1a3eaSLuis R. Rodriguez } 30505f1a3eaSLuis R. Rodriguez 306379b82f4SJohannes Berg static void reset_regdomains(bool full_reset, 307379b82f4SJohannes Berg const struct ieee80211_regdomain *new_regdom) 308734366deSJohannes Berg { 309458f4f9eSJohannes Berg const struct ieee80211_regdomain *r; 310458f4f9eSJohannes Berg 31138fd2143SJohannes Berg ASSERT_RTNL(); 312e8da2bb4SJohannes Berg 313458f4f9eSJohannes Berg r = get_cfg80211_regdom(); 314458f4f9eSJohannes Berg 315942b25cfSJohannes Berg /* avoid freeing static information or freeing something twice */ 316458f4f9eSJohannes Berg if (r == cfg80211_world_regdom) 317458f4f9eSJohannes Berg r = NULL; 318942b25cfSJohannes Berg if (cfg80211_world_regdom == &world_regdom) 319942b25cfSJohannes Berg cfg80211_world_regdom = NULL; 320458f4f9eSJohannes Berg if (r == &world_regdom) 321458f4f9eSJohannes Berg r = NULL; 322942b25cfSJohannes Berg 323458f4f9eSJohannes Berg rcu_free_regdom(r); 324458f4f9eSJohannes Berg rcu_free_regdom(cfg80211_world_regdom); 325734366deSJohannes Berg 326a3d2eaf0SJohannes Berg cfg80211_world_regdom = &world_regdom; 327458f4f9eSJohannes Berg rcu_assign_pointer(cfg80211_regdomain, new_regdom); 328a042994dSLuis R. Rodriguez 329a042994dSLuis R. Rodriguez if (!full_reset) 330a042994dSLuis R. Rodriguez return; 331a042994dSLuis R. Rodriguez 33205f1a3eaSLuis R. Rodriguez reg_update_last_request(&core_request_world); 333734366deSJohannes Berg } 334734366deSJohannes Berg 335fb1fc7adSLuis R. Rodriguez /* 336fb1fc7adSLuis R. Rodriguez * Dynamic world regulatory domain requested by the wireless 337fb1fc7adSLuis R. Rodriguez * core upon initialization 338fb1fc7adSLuis R. Rodriguez */ 339a3d2eaf0SJohannes Berg static void update_world_regdomain(const struct ieee80211_regdomain *rd) 340734366deSJohannes Berg { 341c492db37SJohannes Berg struct regulatory_request *lr; 342734366deSJohannes Berg 343c492db37SJohannes Berg lr = get_last_request(); 344c492db37SJohannes Berg 345c492db37SJohannes Berg WARN_ON(!lr); 346e8da2bb4SJohannes Berg 347379b82f4SJohannes Berg reset_regdomains(false, rd); 348734366deSJohannes Berg 349734366deSJohannes Berg cfg80211_world_regdom = rd; 350734366deSJohannes Berg } 351734366deSJohannes Berg 352a3d2eaf0SJohannes Berg bool is_world_regdom(const char *alpha2) 353b2e1b302SLuis R. Rodriguez { 354b2e1b302SLuis R. Rodriguez if (!alpha2) 355b2e1b302SLuis R. Rodriguez return false; 3561a919318SJohannes Berg return alpha2[0] == '0' && alpha2[1] == '0'; 357b2e1b302SLuis R. Rodriguez } 358b2e1b302SLuis R. Rodriguez 359a3d2eaf0SJohannes Berg static bool is_alpha2_set(const char *alpha2) 360b2e1b302SLuis R. Rodriguez { 361b2e1b302SLuis R. Rodriguez if (!alpha2) 362b2e1b302SLuis R. Rodriguez return false; 3631a919318SJohannes Berg return alpha2[0] && alpha2[1]; 364b2e1b302SLuis R. Rodriguez } 365b2e1b302SLuis R. Rodriguez 366a3d2eaf0SJohannes Berg static bool is_unknown_alpha2(const char *alpha2) 367b2e1b302SLuis R. Rodriguez { 368b2e1b302SLuis R. Rodriguez if (!alpha2) 369b2e1b302SLuis R. Rodriguez return false; 370fb1fc7adSLuis R. Rodriguez /* 371fb1fc7adSLuis R. Rodriguez * Special case where regulatory domain was built by driver 372fb1fc7adSLuis R. Rodriguez * but a specific alpha2 cannot be determined 373fb1fc7adSLuis R. Rodriguez */ 3741a919318SJohannes Berg return alpha2[0] == '9' && alpha2[1] == '9'; 375b2e1b302SLuis R. Rodriguez } 376b2e1b302SLuis R. Rodriguez 3773f2355cbSLuis R. Rodriguez static bool is_intersected_alpha2(const char *alpha2) 3783f2355cbSLuis R. Rodriguez { 3793f2355cbSLuis R. Rodriguez if (!alpha2) 3803f2355cbSLuis R. Rodriguez return false; 381fb1fc7adSLuis R. Rodriguez /* 382fb1fc7adSLuis R. Rodriguez * Special case where regulatory domain is the 3833f2355cbSLuis R. Rodriguez * result of an intersection between two regulatory domain 384fb1fc7adSLuis R. Rodriguez * structures 385fb1fc7adSLuis R. Rodriguez */ 3861a919318SJohannes Berg return alpha2[0] == '9' && alpha2[1] == '8'; 3873f2355cbSLuis R. Rodriguez } 3883f2355cbSLuis R. Rodriguez 389a3d2eaf0SJohannes Berg static bool is_an_alpha2(const char *alpha2) 390b2e1b302SLuis R. Rodriguez { 391b2e1b302SLuis R. Rodriguez if (!alpha2) 392b2e1b302SLuis R. Rodriguez return false; 3931a919318SJohannes Berg return isalpha(alpha2[0]) && isalpha(alpha2[1]); 394b2e1b302SLuis R. Rodriguez } 395b2e1b302SLuis R. Rodriguez 396a3d2eaf0SJohannes Berg static bool alpha2_equal(const char *alpha2_x, const char *alpha2_y) 397b2e1b302SLuis R. Rodriguez { 398b2e1b302SLuis R. Rodriguez if (!alpha2_x || !alpha2_y) 399b2e1b302SLuis R. Rodriguez return false; 4001a919318SJohannes Berg return alpha2_x[0] == alpha2_y[0] && alpha2_x[1] == alpha2_y[1]; 401b2e1b302SLuis R. Rodriguez } 402b2e1b302SLuis R. Rodriguez 40369b1572bSLuis R. Rodriguez static bool regdom_changes(const char *alpha2) 404b2e1b302SLuis R. Rodriguez { 405458f4f9eSJohannes Berg const struct ieee80211_regdomain *r = get_cfg80211_regdom(); 406761cf7ecSLuis R. Rodriguez 407458f4f9eSJohannes Berg if (!r) 408b2e1b302SLuis R. Rodriguez return true; 409458f4f9eSJohannes Berg return !alpha2_equal(r->alpha2, alpha2); 410b2e1b302SLuis R. Rodriguez } 411b2e1b302SLuis R. Rodriguez 41209d989d1SLuis R. Rodriguez /* 41309d989d1SLuis R. Rodriguez * The NL80211_REGDOM_SET_BY_USER regdom alpha2 is cached, this lets 41409d989d1SLuis R. Rodriguez * you know if a valid regulatory hint with NL80211_REGDOM_SET_BY_USER 41509d989d1SLuis R. Rodriguez * has ever been issued. 41609d989d1SLuis R. Rodriguez */ 41709d989d1SLuis R. Rodriguez static bool is_user_regdom_saved(void) 41809d989d1SLuis R. Rodriguez { 41909d989d1SLuis R. Rodriguez if (user_alpha2[0] == '9' && user_alpha2[1] == '7') 42009d989d1SLuis R. Rodriguez return false; 42109d989d1SLuis R. Rodriguez 42209d989d1SLuis R. Rodriguez /* This would indicate a mistake on the design */ 4231a919318SJohannes Berg if (WARN(!is_world_regdom(user_alpha2) && !is_an_alpha2(user_alpha2), 42409d989d1SLuis R. Rodriguez "Unexpected user alpha2: %c%c\n", 4251a919318SJohannes Berg user_alpha2[0], user_alpha2[1])) 42609d989d1SLuis R. Rodriguez return false; 42709d989d1SLuis R. Rodriguez 42809d989d1SLuis R. Rodriguez return true; 42909d989d1SLuis R. Rodriguez } 43009d989d1SLuis R. Rodriguez 431e9763c3cSJohannes Berg static const struct ieee80211_regdomain * 432e9763c3cSJohannes Berg reg_copy_regd(const struct ieee80211_regdomain *src_regd) 4333b377ea9SJohn W. Linville { 4343b377ea9SJohn W. Linville struct ieee80211_regdomain *regd; 435e9763c3cSJohannes Berg int size_of_regd; 4363b377ea9SJohn W. Linville unsigned int i; 4373b377ea9SJohn W. Linville 43882f20856SJohannes Berg size_of_regd = 43982f20856SJohannes Berg sizeof(struct ieee80211_regdomain) + 44082f20856SJohannes Berg src_regd->n_reg_rules * sizeof(struct ieee80211_reg_rule); 4413b377ea9SJohn W. Linville 4423b377ea9SJohn W. Linville regd = kzalloc(size_of_regd, GFP_KERNEL); 4433b377ea9SJohn W. Linville if (!regd) 444e9763c3cSJohannes Berg return ERR_PTR(-ENOMEM); 4453b377ea9SJohn W. Linville 4463b377ea9SJohn W. Linville memcpy(regd, src_regd, sizeof(struct ieee80211_regdomain)); 4473b377ea9SJohn W. Linville 4483b377ea9SJohn W. Linville for (i = 0; i < src_regd->n_reg_rules; i++) 4493b377ea9SJohn W. Linville memcpy(®d->reg_rules[i], &src_regd->reg_rules[i], 4503b377ea9SJohn W. Linville sizeof(struct ieee80211_reg_rule)); 4513b377ea9SJohn W. Linville 452e9763c3cSJohannes Berg return regd; 4533b377ea9SJohn W. Linville } 4543b377ea9SJohn W. Linville 4553b377ea9SJohn W. Linville #ifdef CONFIG_CFG80211_INTERNAL_REGDB 4563b377ea9SJohn W. Linville struct reg_regdb_search_request { 4573b377ea9SJohn W. Linville char alpha2[2]; 4583b377ea9SJohn W. Linville struct list_head list; 4593b377ea9SJohn W. Linville }; 4603b377ea9SJohn W. Linville 4613b377ea9SJohn W. Linville static LIST_HEAD(reg_regdb_search_list); 462368d06f5SJohn W. Linville static DEFINE_MUTEX(reg_regdb_search_mutex); 4633b377ea9SJohn W. Linville 4643b377ea9SJohn W. Linville static void reg_regdb_search(struct work_struct *work) 4653b377ea9SJohn W. Linville { 4663b377ea9SJohn W. Linville struct reg_regdb_search_request *request; 467e9763c3cSJohannes Berg const struct ieee80211_regdomain *curdom, *regdom = NULL; 468e9763c3cSJohannes Berg int i; 469a85d0d7fSLuis R. Rodriguez 4705fe231e8SJohannes Berg rtnl_lock(); 4713b377ea9SJohn W. Linville 472368d06f5SJohn W. Linville mutex_lock(®_regdb_search_mutex); 4733b377ea9SJohn W. Linville while (!list_empty(®_regdb_search_list)) { 4743b377ea9SJohn W. Linville request = list_first_entry(®_regdb_search_list, 4753b377ea9SJohn W. Linville struct reg_regdb_search_request, 4763b377ea9SJohn W. Linville list); 4773b377ea9SJohn W. Linville list_del(&request->list); 4783b377ea9SJohn W. Linville 4793b377ea9SJohn W. Linville for (i = 0; i < reg_regdb_size; i++) { 4803b377ea9SJohn W. Linville curdom = reg_regdb[i]; 4813b377ea9SJohn W. Linville 4821a919318SJohannes Berg if (alpha2_equal(request->alpha2, curdom->alpha2)) { 483e9763c3cSJohannes Berg regdom = reg_copy_regd(curdom); 4843b377ea9SJohn W. Linville break; 4853b377ea9SJohn W. Linville } 4863b377ea9SJohn W. Linville } 4873b377ea9SJohn W. Linville 4883b377ea9SJohn W. Linville kfree(request); 4893b377ea9SJohn W. Linville } 490368d06f5SJohn W. Linville mutex_unlock(®_regdb_search_mutex); 491a85d0d7fSLuis R. Rodriguez 492e9763c3cSJohannes Berg if (!IS_ERR_OR_NULL(regdom)) 493c37722bdSIlan peer set_regdom(regdom, REGD_SOURCE_INTERNAL_DB); 494a85d0d7fSLuis R. Rodriguez 4955fe231e8SJohannes Berg rtnl_unlock(); 4963b377ea9SJohn W. Linville } 4973b377ea9SJohn W. Linville 4983b377ea9SJohn W. Linville static DECLARE_WORK(reg_regdb_work, reg_regdb_search); 4993b377ea9SJohn W. Linville 5003b377ea9SJohn W. Linville static void reg_regdb_query(const char *alpha2) 5013b377ea9SJohn W. Linville { 5023b377ea9SJohn W. Linville struct reg_regdb_search_request *request; 5033b377ea9SJohn W. Linville 5043b377ea9SJohn W. Linville request = kzalloc(sizeof(struct reg_regdb_search_request), GFP_KERNEL); 5053b377ea9SJohn W. Linville if (!request) 5063b377ea9SJohn W. Linville return; 5073b377ea9SJohn W. Linville 5083b377ea9SJohn W. Linville memcpy(request->alpha2, alpha2, 2); 5093b377ea9SJohn W. Linville 510368d06f5SJohn W. Linville mutex_lock(®_regdb_search_mutex); 5113b377ea9SJohn W. Linville list_add_tail(&request->list, ®_regdb_search_list); 512368d06f5SJohn W. Linville mutex_unlock(®_regdb_search_mutex); 5133b377ea9SJohn W. Linville 5143b377ea9SJohn W. Linville schedule_work(®_regdb_work); 5153b377ea9SJohn W. Linville } 51680007efeSLuis R. Rodriguez 51780007efeSLuis R. Rodriguez /* Feel free to add any other sanity checks here */ 51880007efeSLuis R. Rodriguez static void reg_regdb_size_check(void) 51980007efeSLuis R. Rodriguez { 52080007efeSLuis R. Rodriguez /* We should ideally BUILD_BUG_ON() but then random builds would fail */ 52180007efeSLuis R. Rodriguez WARN_ONCE(!reg_regdb_size, "db.txt is empty, you should update it..."); 52280007efeSLuis R. Rodriguez } 5233b377ea9SJohn W. Linville #else 52480007efeSLuis R. Rodriguez static inline void reg_regdb_size_check(void) {} 5253b377ea9SJohn W. Linville static inline void reg_regdb_query(const char *alpha2) {} 5263b377ea9SJohn W. Linville #endif /* CONFIG_CFG80211_INTERNAL_REGDB */ 5273b377ea9SJohn W. Linville 528fb1fc7adSLuis R. Rodriguez /* 529fb1fc7adSLuis R. Rodriguez * This lets us keep regulatory code which is updated on a regulatory 5301226d258SJohannes Berg * basis in userspace. 531fb1fc7adSLuis R. Rodriguez */ 532b2e1b302SLuis R. Rodriguez static int call_crda(const char *alpha2) 533b2e1b302SLuis R. Rodriguez { 5341226d258SJohannes Berg char country[12]; 5351226d258SJohannes Berg char *env[] = { country, NULL }; 5361226d258SJohannes Berg 5371226d258SJohannes Berg snprintf(country, sizeof(country), "COUNTRY=%c%c", 5381226d258SJohannes Berg alpha2[0], alpha2[1]); 5391226d258SJohannes Berg 540c37722bdSIlan peer /* query internal regulatory database (if it exists) */ 541c37722bdSIlan peer reg_regdb_query(alpha2); 542c37722bdSIlan peer 543c37722bdSIlan peer if (reg_crda_timeouts > REG_MAX_CRDA_TIMEOUTS) { 544042ab5fcSThomas Petazzoni pr_debug("Exceeded CRDA call max attempts. Not calling CRDA\n"); 545c37722bdSIlan peer return -EINVAL; 546c37722bdSIlan peer } 547c37722bdSIlan peer 548b2e1b302SLuis R. Rodriguez if (!is_world_regdom((char *) alpha2)) 549042ab5fcSThomas Petazzoni pr_debug("Calling CRDA for country: %c%c\n", 550b2e1b302SLuis R. Rodriguez alpha2[0], alpha2[1]); 551b2e1b302SLuis R. Rodriguez else 552042ab5fcSThomas Petazzoni pr_debug("Calling CRDA to update world regulatory domain\n"); 5538318d78aSJohannes Berg 5541226d258SJohannes Berg return kobject_uevent_env(®_pdev->dev.kobj, KOBJ_CHANGE, env); 555b2e1b302SLuis R. Rodriguez } 556b2e1b302SLuis R. Rodriguez 55725b20dbdSJohannes Berg static bool reg_call_crda(struct regulatory_request *request) 558fe6631ffSLuis R. Rodriguez { 559fe6631ffSLuis R. Rodriguez if (call_crda(request->alpha2)) 56025b20dbdSJohannes Berg return false; 561eeca9fceSIlan peer 562eeca9fceSIlan peer queue_delayed_work(system_power_efficient_wq, 563eeca9fceSIlan peer ®_timeout, msecs_to_jiffies(3142)); 56425b20dbdSJohannes Berg return true; 565fe6631ffSLuis R. Rodriguez } 566fe6631ffSLuis R. Rodriguez 567e438768fSLuis R. Rodriguez bool reg_is_valid_request(const char *alpha2) 568b2e1b302SLuis R. Rodriguez { 569c492db37SJohannes Berg struct regulatory_request *lr = get_last_request(); 57061405e97SLuis R. Rodriguez 571c492db37SJohannes Berg if (!lr || lr->processed) 572f6037d09SJohannes Berg return false; 573f6037d09SJohannes Berg 574c492db37SJohannes Berg return alpha2_equal(lr->alpha2, alpha2); 575b2e1b302SLuis R. Rodriguez } 576b2e1b302SLuis R. Rodriguez 577e3961af1SJanusz Dziedzic static const struct ieee80211_regdomain *reg_get_regdomain(struct wiphy *wiphy) 578e3961af1SJanusz Dziedzic { 579e3961af1SJanusz Dziedzic struct regulatory_request *lr = get_last_request(); 580e3961af1SJanusz Dziedzic 581e3961af1SJanusz Dziedzic /* 582e3961af1SJanusz Dziedzic * Follow the driver's regulatory domain, if present, unless a country 583e3961af1SJanusz Dziedzic * IE has been processed or a user wants to help complaince further 584e3961af1SJanusz Dziedzic */ 585e3961af1SJanusz Dziedzic if (lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && 586e3961af1SJanusz Dziedzic lr->initiator != NL80211_REGDOM_SET_BY_USER && 587e3961af1SJanusz Dziedzic wiphy->regd) 588e3961af1SJanusz Dziedzic return get_wiphy_regdom(wiphy); 589e3961af1SJanusz Dziedzic 590e3961af1SJanusz Dziedzic return get_cfg80211_regdom(); 591e3961af1SJanusz Dziedzic } 592e3961af1SJanusz Dziedzic 593a6d4a534SArik Nemtsov static unsigned int 594a6d4a534SArik Nemtsov reg_get_max_bandwidth_from_range(const struct ieee80211_regdomain *rd, 59597524820SJanusz Dziedzic const struct ieee80211_reg_rule *rule) 59697524820SJanusz Dziedzic { 59797524820SJanusz Dziedzic const struct ieee80211_freq_range *freq_range = &rule->freq_range; 59897524820SJanusz Dziedzic const struct ieee80211_freq_range *freq_range_tmp; 59997524820SJanusz Dziedzic const struct ieee80211_reg_rule *tmp; 60097524820SJanusz Dziedzic u32 start_freq, end_freq, idx, no; 60197524820SJanusz Dziedzic 60297524820SJanusz Dziedzic for (idx = 0; idx < rd->n_reg_rules; idx++) 60397524820SJanusz Dziedzic if (rule == &rd->reg_rules[idx]) 60497524820SJanusz Dziedzic break; 60597524820SJanusz Dziedzic 60697524820SJanusz Dziedzic if (idx == rd->n_reg_rules) 60797524820SJanusz Dziedzic return 0; 60897524820SJanusz Dziedzic 60997524820SJanusz Dziedzic /* get start_freq */ 61097524820SJanusz Dziedzic no = idx; 61197524820SJanusz Dziedzic 61297524820SJanusz Dziedzic while (no) { 61397524820SJanusz Dziedzic tmp = &rd->reg_rules[--no]; 61497524820SJanusz Dziedzic freq_range_tmp = &tmp->freq_range; 61597524820SJanusz Dziedzic 61697524820SJanusz Dziedzic if (freq_range_tmp->end_freq_khz < freq_range->start_freq_khz) 61797524820SJanusz Dziedzic break; 61897524820SJanusz Dziedzic 61997524820SJanusz Dziedzic freq_range = freq_range_tmp; 62097524820SJanusz Dziedzic } 62197524820SJanusz Dziedzic 62297524820SJanusz Dziedzic start_freq = freq_range->start_freq_khz; 62397524820SJanusz Dziedzic 62497524820SJanusz Dziedzic /* get end_freq */ 62597524820SJanusz Dziedzic freq_range = &rule->freq_range; 62697524820SJanusz Dziedzic no = idx; 62797524820SJanusz Dziedzic 62897524820SJanusz Dziedzic while (no < rd->n_reg_rules - 1) { 62997524820SJanusz Dziedzic tmp = &rd->reg_rules[++no]; 63097524820SJanusz Dziedzic freq_range_tmp = &tmp->freq_range; 63197524820SJanusz Dziedzic 63297524820SJanusz Dziedzic if (freq_range_tmp->start_freq_khz > freq_range->end_freq_khz) 63397524820SJanusz Dziedzic break; 63497524820SJanusz Dziedzic 63597524820SJanusz Dziedzic freq_range = freq_range_tmp; 63697524820SJanusz Dziedzic } 63797524820SJanusz Dziedzic 63897524820SJanusz Dziedzic end_freq = freq_range->end_freq_khz; 63997524820SJanusz Dziedzic 64097524820SJanusz Dziedzic return end_freq - start_freq; 64197524820SJanusz Dziedzic } 64297524820SJanusz Dziedzic 643a6d4a534SArik Nemtsov unsigned int reg_get_max_bandwidth(const struct ieee80211_regdomain *rd, 644a6d4a534SArik Nemtsov const struct ieee80211_reg_rule *rule) 645a6d4a534SArik Nemtsov { 646a6d4a534SArik Nemtsov unsigned int bw = reg_get_max_bandwidth_from_range(rd, rule); 647a6d4a534SArik Nemtsov 648a6d4a534SArik Nemtsov if (rule->flags & NL80211_RRF_NO_160MHZ) 649a6d4a534SArik Nemtsov bw = min_t(unsigned int, bw, MHZ_TO_KHZ(80)); 650a6d4a534SArik Nemtsov if (rule->flags & NL80211_RRF_NO_80MHZ) 651a6d4a534SArik Nemtsov bw = min_t(unsigned int, bw, MHZ_TO_KHZ(40)); 652a6d4a534SArik Nemtsov 653a6d4a534SArik Nemtsov /* 654a6d4a534SArik Nemtsov * HT40+/HT40- limits are handled per-channel. Only limit BW if both 655a6d4a534SArik Nemtsov * are not allowed. 656a6d4a534SArik Nemtsov */ 657a6d4a534SArik Nemtsov if (rule->flags & NL80211_RRF_NO_HT40MINUS && 658a6d4a534SArik Nemtsov rule->flags & NL80211_RRF_NO_HT40PLUS) 659a6d4a534SArik Nemtsov bw = min_t(unsigned int, bw, MHZ_TO_KHZ(20)); 660a6d4a534SArik Nemtsov 661a6d4a534SArik Nemtsov return bw; 662a6d4a534SArik Nemtsov } 663a6d4a534SArik Nemtsov 664b2e1b302SLuis R. Rodriguez /* Sanity check on a regulatory rule */ 665a3d2eaf0SJohannes Berg static bool is_valid_reg_rule(const struct ieee80211_reg_rule *rule) 666b2e1b302SLuis R. Rodriguez { 667a3d2eaf0SJohannes Berg const struct ieee80211_freq_range *freq_range = &rule->freq_range; 668b2e1b302SLuis R. Rodriguez u32 freq_diff; 669b2e1b302SLuis R. Rodriguez 67091e99004SLuis R. Rodriguez if (freq_range->start_freq_khz <= 0 || freq_range->end_freq_khz <= 0) 671b2e1b302SLuis R. Rodriguez return false; 672b2e1b302SLuis R. Rodriguez 673b2e1b302SLuis R. Rodriguez if (freq_range->start_freq_khz > freq_range->end_freq_khz) 674b2e1b302SLuis R. Rodriguez return false; 675b2e1b302SLuis R. Rodriguez 676b2e1b302SLuis R. Rodriguez freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz; 677b2e1b302SLuis R. Rodriguez 678bd05f28eSRoel Kluin if (freq_range->end_freq_khz <= freq_range->start_freq_khz || 679bd05f28eSRoel Kluin freq_range->max_bandwidth_khz > freq_diff) 680b2e1b302SLuis R. Rodriguez return false; 681b2e1b302SLuis R. Rodriguez 682b2e1b302SLuis R. Rodriguez return true; 683b2e1b302SLuis R. Rodriguez } 684b2e1b302SLuis R. Rodriguez 685a3d2eaf0SJohannes Berg static bool is_valid_rd(const struct ieee80211_regdomain *rd) 686b2e1b302SLuis R. Rodriguez { 687a3d2eaf0SJohannes Berg const struct ieee80211_reg_rule *reg_rule = NULL; 688b2e1b302SLuis R. Rodriguez unsigned int i; 689b2e1b302SLuis R. Rodriguez 690b2e1b302SLuis R. Rodriguez if (!rd->n_reg_rules) 691b2e1b302SLuis R. Rodriguez return false; 692b2e1b302SLuis R. Rodriguez 69388dc1c3fSLuis R. Rodriguez if (WARN_ON(rd->n_reg_rules > NL80211_MAX_SUPP_REG_RULES)) 69488dc1c3fSLuis R. Rodriguez return false; 69588dc1c3fSLuis R. Rodriguez 696b2e1b302SLuis R. Rodriguez for (i = 0; i < rd->n_reg_rules; i++) { 697b2e1b302SLuis R. Rodriguez reg_rule = &rd->reg_rules[i]; 698b2e1b302SLuis R. Rodriguez if (!is_valid_reg_rule(reg_rule)) 699b2e1b302SLuis R. Rodriguez return false; 700b2e1b302SLuis R. Rodriguez } 701b2e1b302SLuis R. Rodriguez 702b2e1b302SLuis R. Rodriguez return true; 703b2e1b302SLuis R. Rodriguez } 704b2e1b302SLuis R. Rodriguez 705038659e7SLuis R. Rodriguez static bool reg_does_bw_fit(const struct ieee80211_freq_range *freq_range, 706fe7ef5e9SJohannes Berg u32 center_freq_khz, u32 bw_khz) 707b2e1b302SLuis R. Rodriguez { 708038659e7SLuis R. Rodriguez u32 start_freq_khz, end_freq_khz; 709038659e7SLuis R. Rodriguez 710038659e7SLuis R. Rodriguez start_freq_khz = center_freq_khz - (bw_khz/2); 711038659e7SLuis R. Rodriguez end_freq_khz = center_freq_khz + (bw_khz/2); 712038659e7SLuis R. Rodriguez 713b2e1b302SLuis R. Rodriguez if (start_freq_khz >= freq_range->start_freq_khz && 714b2e1b302SLuis R. Rodriguez end_freq_khz <= freq_range->end_freq_khz) 715038659e7SLuis R. Rodriguez return true; 716038659e7SLuis R. Rodriguez 717038659e7SLuis R. Rodriguez return false; 718b2e1b302SLuis R. Rodriguez } 719b2e1b302SLuis R. Rodriguez 7200c7dc45dSLuis R. Rodriguez /** 7210c7dc45dSLuis R. Rodriguez * freq_in_rule_band - tells us if a frequency is in a frequency band 7220c7dc45dSLuis R. Rodriguez * @freq_range: frequency rule we want to query 7230c7dc45dSLuis R. Rodriguez * @freq_khz: frequency we are inquiring about 7240c7dc45dSLuis R. Rodriguez * 7250c7dc45dSLuis R. Rodriguez * This lets us know if a specific frequency rule is or is not relevant to 7260c7dc45dSLuis R. Rodriguez * a specific frequency's band. Bands are device specific and artificial 72764629b9dSVladimir Kondratiev * definitions (the "2.4 GHz band", the "5 GHz band" and the "60GHz band"), 72864629b9dSVladimir Kondratiev * however it is safe for now to assume that a frequency rule should not be 72964629b9dSVladimir Kondratiev * part of a frequency's band if the start freq or end freq are off by more 73064629b9dSVladimir Kondratiev * than 2 GHz for the 2.4 and 5 GHz bands, and by more than 10 GHz for the 73164629b9dSVladimir Kondratiev * 60 GHz band. 7320c7dc45dSLuis R. Rodriguez * This resolution can be lowered and should be considered as we add 7330c7dc45dSLuis R. Rodriguez * regulatory rule support for other "bands". 7340c7dc45dSLuis R. Rodriguez **/ 7350c7dc45dSLuis R. Rodriguez static bool freq_in_rule_band(const struct ieee80211_freq_range *freq_range, 7360c7dc45dSLuis R. Rodriguez u32 freq_khz) 7370c7dc45dSLuis R. Rodriguez { 7380c7dc45dSLuis R. Rodriguez #define ONE_GHZ_IN_KHZ 1000000 73964629b9dSVladimir Kondratiev /* 74064629b9dSVladimir Kondratiev * From 802.11ad: directional multi-gigabit (DMG): 74164629b9dSVladimir Kondratiev * Pertaining to operation in a frequency band containing a channel 74264629b9dSVladimir Kondratiev * with the Channel starting frequency above 45 GHz. 74364629b9dSVladimir Kondratiev */ 74464629b9dSVladimir Kondratiev u32 limit = freq_khz > 45 * ONE_GHZ_IN_KHZ ? 74564629b9dSVladimir Kondratiev 10 * ONE_GHZ_IN_KHZ : 2 * ONE_GHZ_IN_KHZ; 74664629b9dSVladimir Kondratiev if (abs(freq_khz - freq_range->start_freq_khz) <= limit) 7470c7dc45dSLuis R. Rodriguez return true; 74864629b9dSVladimir Kondratiev if (abs(freq_khz - freq_range->end_freq_khz) <= limit) 7490c7dc45dSLuis R. Rodriguez return true; 7500c7dc45dSLuis R. Rodriguez return false; 7510c7dc45dSLuis R. Rodriguez #undef ONE_GHZ_IN_KHZ 7520c7dc45dSLuis R. Rodriguez } 7530c7dc45dSLuis R. Rodriguez 754fb1fc7adSLuis R. Rodriguez /* 755adbfb058SLuis R. Rodriguez * Later on we can perhaps use the more restrictive DFS 756adbfb058SLuis R. Rodriguez * region but we don't have information for that yet so 757adbfb058SLuis R. Rodriguez * for now simply disallow conflicts. 758adbfb058SLuis R. Rodriguez */ 759adbfb058SLuis R. Rodriguez static enum nl80211_dfs_regions 760adbfb058SLuis R. Rodriguez reg_intersect_dfs_region(const enum nl80211_dfs_regions dfs_region1, 761adbfb058SLuis R. Rodriguez const enum nl80211_dfs_regions dfs_region2) 762adbfb058SLuis R. Rodriguez { 763adbfb058SLuis R. Rodriguez if (dfs_region1 != dfs_region2) 764adbfb058SLuis R. Rodriguez return NL80211_DFS_UNSET; 765adbfb058SLuis R. Rodriguez return dfs_region1; 766adbfb058SLuis R. Rodriguez } 767adbfb058SLuis R. Rodriguez 768adbfb058SLuis R. Rodriguez /* 769fb1fc7adSLuis R. Rodriguez * Helper for regdom_intersect(), this does the real 770fb1fc7adSLuis R. Rodriguez * mathematical intersection fun 771fb1fc7adSLuis R. Rodriguez */ 77297524820SJanusz Dziedzic static int reg_rules_intersect(const struct ieee80211_regdomain *rd1, 77397524820SJanusz Dziedzic const struct ieee80211_regdomain *rd2, 77497524820SJanusz Dziedzic const struct ieee80211_reg_rule *rule1, 7759c96477dSLuis R. Rodriguez const struct ieee80211_reg_rule *rule2, 7769c96477dSLuis R. Rodriguez struct ieee80211_reg_rule *intersected_rule) 7779c96477dSLuis R. Rodriguez { 7789c96477dSLuis R. Rodriguez const struct ieee80211_freq_range *freq_range1, *freq_range2; 7799c96477dSLuis R. Rodriguez struct ieee80211_freq_range *freq_range; 7809c96477dSLuis R. Rodriguez const struct ieee80211_power_rule *power_rule1, *power_rule2; 7819c96477dSLuis R. Rodriguez struct ieee80211_power_rule *power_rule; 78297524820SJanusz Dziedzic u32 freq_diff, max_bandwidth1, max_bandwidth2; 7839c96477dSLuis R. Rodriguez 7849c96477dSLuis R. Rodriguez freq_range1 = &rule1->freq_range; 7859c96477dSLuis R. Rodriguez freq_range2 = &rule2->freq_range; 7869c96477dSLuis R. Rodriguez freq_range = &intersected_rule->freq_range; 7879c96477dSLuis R. Rodriguez 7889c96477dSLuis R. Rodriguez power_rule1 = &rule1->power_rule; 7899c96477dSLuis R. Rodriguez power_rule2 = &rule2->power_rule; 7909c96477dSLuis R. Rodriguez power_rule = &intersected_rule->power_rule; 7919c96477dSLuis R. Rodriguez 7929c96477dSLuis R. Rodriguez freq_range->start_freq_khz = max(freq_range1->start_freq_khz, 7939c96477dSLuis R. Rodriguez freq_range2->start_freq_khz); 7949c96477dSLuis R. Rodriguez freq_range->end_freq_khz = min(freq_range1->end_freq_khz, 7959c96477dSLuis R. Rodriguez freq_range2->end_freq_khz); 79697524820SJanusz Dziedzic 79797524820SJanusz Dziedzic max_bandwidth1 = freq_range1->max_bandwidth_khz; 79897524820SJanusz Dziedzic max_bandwidth2 = freq_range2->max_bandwidth_khz; 79997524820SJanusz Dziedzic 800b0dfd2eaSJanusz Dziedzic if (rule1->flags & NL80211_RRF_AUTO_BW) 80197524820SJanusz Dziedzic max_bandwidth1 = reg_get_max_bandwidth(rd1, rule1); 802b0dfd2eaSJanusz Dziedzic if (rule2->flags & NL80211_RRF_AUTO_BW) 80397524820SJanusz Dziedzic max_bandwidth2 = reg_get_max_bandwidth(rd2, rule2); 80497524820SJanusz Dziedzic 80597524820SJanusz Dziedzic freq_range->max_bandwidth_khz = min(max_bandwidth1, max_bandwidth2); 8069c96477dSLuis R. Rodriguez 807b0dfd2eaSJanusz Dziedzic intersected_rule->flags = rule1->flags | rule2->flags; 808b0dfd2eaSJanusz Dziedzic 809b0dfd2eaSJanusz Dziedzic /* 810b0dfd2eaSJanusz Dziedzic * In case NL80211_RRF_AUTO_BW requested for both rules 811b0dfd2eaSJanusz Dziedzic * set AUTO_BW in intersected rule also. Next we will 812b0dfd2eaSJanusz Dziedzic * calculate BW correctly in handle_channel function. 813b0dfd2eaSJanusz Dziedzic * In other case remove AUTO_BW flag while we calculate 814b0dfd2eaSJanusz Dziedzic * maximum bandwidth correctly and auto calculation is 815b0dfd2eaSJanusz Dziedzic * not required. 816b0dfd2eaSJanusz Dziedzic */ 817b0dfd2eaSJanusz Dziedzic if ((rule1->flags & NL80211_RRF_AUTO_BW) && 818b0dfd2eaSJanusz Dziedzic (rule2->flags & NL80211_RRF_AUTO_BW)) 819b0dfd2eaSJanusz Dziedzic intersected_rule->flags |= NL80211_RRF_AUTO_BW; 820b0dfd2eaSJanusz Dziedzic else 821b0dfd2eaSJanusz Dziedzic intersected_rule->flags &= ~NL80211_RRF_AUTO_BW; 822b0dfd2eaSJanusz Dziedzic 8239c96477dSLuis R. Rodriguez freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz; 8249c96477dSLuis R. Rodriguez if (freq_range->max_bandwidth_khz > freq_diff) 8259c96477dSLuis R. Rodriguez freq_range->max_bandwidth_khz = freq_diff; 8269c96477dSLuis R. Rodriguez 8279c96477dSLuis R. Rodriguez power_rule->max_eirp = min(power_rule1->max_eirp, 8289c96477dSLuis R. Rodriguez power_rule2->max_eirp); 8299c96477dSLuis R. Rodriguez power_rule->max_antenna_gain = min(power_rule1->max_antenna_gain, 8309c96477dSLuis R. Rodriguez power_rule2->max_antenna_gain); 8319c96477dSLuis R. Rodriguez 832089027e5SJanusz Dziedzic intersected_rule->dfs_cac_ms = max(rule1->dfs_cac_ms, 833089027e5SJanusz Dziedzic rule2->dfs_cac_ms); 834089027e5SJanusz Dziedzic 8359c96477dSLuis R. Rodriguez if (!is_valid_reg_rule(intersected_rule)) 8369c96477dSLuis R. Rodriguez return -EINVAL; 8379c96477dSLuis R. Rodriguez 8389c96477dSLuis R. Rodriguez return 0; 8399c96477dSLuis R. Rodriguez } 8409c96477dSLuis R. Rodriguez 841a62a1aedSEliad Peller /* check whether old rule contains new rule */ 842a62a1aedSEliad Peller static bool rule_contains(struct ieee80211_reg_rule *r1, 843a62a1aedSEliad Peller struct ieee80211_reg_rule *r2) 844a62a1aedSEliad Peller { 845a62a1aedSEliad Peller /* for simplicity, currently consider only same flags */ 846a62a1aedSEliad Peller if (r1->flags != r2->flags) 847a62a1aedSEliad Peller return false; 848a62a1aedSEliad Peller 849a62a1aedSEliad Peller /* verify r1 is more restrictive */ 850a62a1aedSEliad Peller if ((r1->power_rule.max_antenna_gain > 851a62a1aedSEliad Peller r2->power_rule.max_antenna_gain) || 852a62a1aedSEliad Peller r1->power_rule.max_eirp > r2->power_rule.max_eirp) 853a62a1aedSEliad Peller return false; 854a62a1aedSEliad Peller 855a62a1aedSEliad Peller /* make sure r2's range is contained within r1 */ 856a62a1aedSEliad Peller if (r1->freq_range.start_freq_khz > r2->freq_range.start_freq_khz || 857a62a1aedSEliad Peller r1->freq_range.end_freq_khz < r2->freq_range.end_freq_khz) 858a62a1aedSEliad Peller return false; 859a62a1aedSEliad Peller 860a62a1aedSEliad Peller /* and finally verify that r1.max_bw >= r2.max_bw */ 861a62a1aedSEliad Peller if (r1->freq_range.max_bandwidth_khz < 862a62a1aedSEliad Peller r2->freq_range.max_bandwidth_khz) 863a62a1aedSEliad Peller return false; 864a62a1aedSEliad Peller 865a62a1aedSEliad Peller return true; 866a62a1aedSEliad Peller } 867a62a1aedSEliad Peller 868a62a1aedSEliad Peller /* add or extend current rules. do nothing if rule is already contained */ 869a62a1aedSEliad Peller static void add_rule(struct ieee80211_reg_rule *rule, 870a62a1aedSEliad Peller struct ieee80211_reg_rule *reg_rules, u32 *n_rules) 871a62a1aedSEliad Peller { 872a62a1aedSEliad Peller struct ieee80211_reg_rule *tmp_rule; 873a62a1aedSEliad Peller int i; 874a62a1aedSEliad Peller 875a62a1aedSEliad Peller for (i = 0; i < *n_rules; i++) { 876a62a1aedSEliad Peller tmp_rule = ®_rules[i]; 877a62a1aedSEliad Peller /* rule is already contained - do nothing */ 878a62a1aedSEliad Peller if (rule_contains(tmp_rule, rule)) 879a62a1aedSEliad Peller return; 880a62a1aedSEliad Peller 881a62a1aedSEliad Peller /* extend rule if possible */ 882a62a1aedSEliad Peller if (rule_contains(rule, tmp_rule)) { 883a62a1aedSEliad Peller memcpy(tmp_rule, rule, sizeof(*rule)); 884a62a1aedSEliad Peller return; 885a62a1aedSEliad Peller } 886a62a1aedSEliad Peller } 887a62a1aedSEliad Peller 888a62a1aedSEliad Peller memcpy(®_rules[*n_rules], rule, sizeof(*rule)); 889a62a1aedSEliad Peller (*n_rules)++; 890a62a1aedSEliad Peller } 891a62a1aedSEliad Peller 8929c96477dSLuis R. Rodriguez /** 8939c96477dSLuis R. Rodriguez * regdom_intersect - do the intersection between two regulatory domains 8949c96477dSLuis R. Rodriguez * @rd1: first regulatory domain 8959c96477dSLuis R. Rodriguez * @rd2: second regulatory domain 8969c96477dSLuis R. Rodriguez * 8979c96477dSLuis R. Rodriguez * Use this function to get the intersection between two regulatory domains. 8989c96477dSLuis R. Rodriguez * Once completed we will mark the alpha2 for the rd as intersected, "98", 8999c96477dSLuis R. Rodriguez * as no one single alpha2 can represent this regulatory domain. 9009c96477dSLuis R. Rodriguez * 9019c96477dSLuis R. Rodriguez * Returns a pointer to the regulatory domain structure which will hold the 9029c96477dSLuis R. Rodriguez * resulting intersection of rules between rd1 and rd2. We will 9039c96477dSLuis R. Rodriguez * kzalloc() this structure for you. 9049c96477dSLuis R. Rodriguez */ 9051a919318SJohannes Berg static struct ieee80211_regdomain * 9061a919318SJohannes Berg regdom_intersect(const struct ieee80211_regdomain *rd1, 9079c96477dSLuis R. Rodriguez const struct ieee80211_regdomain *rd2) 9089c96477dSLuis R. Rodriguez { 9099c96477dSLuis R. Rodriguez int r, size_of_regd; 9109c96477dSLuis R. Rodriguez unsigned int x, y; 911a62a1aedSEliad Peller unsigned int num_rules = 0; 9129c96477dSLuis R. Rodriguez const struct ieee80211_reg_rule *rule1, *rule2; 913a62a1aedSEliad Peller struct ieee80211_reg_rule intersected_rule; 9149c96477dSLuis R. Rodriguez struct ieee80211_regdomain *rd; 9159c96477dSLuis R. Rodriguez 9169c96477dSLuis R. Rodriguez if (!rd1 || !rd2) 9179c96477dSLuis R. Rodriguez return NULL; 9189c96477dSLuis R. Rodriguez 919fb1fc7adSLuis R. Rodriguez /* 920fb1fc7adSLuis R. Rodriguez * First we get a count of the rules we'll need, then we actually 9219c96477dSLuis R. Rodriguez * build them. This is to so we can malloc() and free() a 9229c96477dSLuis R. Rodriguez * regdomain once. The reason we use reg_rules_intersect() here 9239c96477dSLuis R. Rodriguez * is it will return -EINVAL if the rule computed makes no sense. 924fb1fc7adSLuis R. Rodriguez * All rules that do check out OK are valid. 925fb1fc7adSLuis R. Rodriguez */ 9269c96477dSLuis R. Rodriguez 9279c96477dSLuis R. Rodriguez for (x = 0; x < rd1->n_reg_rules; x++) { 9289c96477dSLuis R. Rodriguez rule1 = &rd1->reg_rules[x]; 9299c96477dSLuis R. Rodriguez for (y = 0; y < rd2->n_reg_rules; y++) { 9309c96477dSLuis R. Rodriguez rule2 = &rd2->reg_rules[y]; 93197524820SJanusz Dziedzic if (!reg_rules_intersect(rd1, rd2, rule1, rule2, 932a62a1aedSEliad Peller &intersected_rule)) 9339c96477dSLuis R. Rodriguez num_rules++; 9349c96477dSLuis R. Rodriguez } 9359c96477dSLuis R. Rodriguez } 9369c96477dSLuis R. Rodriguez 9379c96477dSLuis R. Rodriguez if (!num_rules) 9389c96477dSLuis R. Rodriguez return NULL; 9399c96477dSLuis R. Rodriguez 9409c96477dSLuis R. Rodriguez size_of_regd = sizeof(struct ieee80211_regdomain) + 94182f20856SJohannes Berg num_rules * sizeof(struct ieee80211_reg_rule); 9429c96477dSLuis R. Rodriguez 9439c96477dSLuis R. Rodriguez rd = kzalloc(size_of_regd, GFP_KERNEL); 9449c96477dSLuis R. Rodriguez if (!rd) 9459c96477dSLuis R. Rodriguez return NULL; 9469c96477dSLuis R. Rodriguez 947a62a1aedSEliad Peller for (x = 0; x < rd1->n_reg_rules; x++) { 9489c96477dSLuis R. Rodriguez rule1 = &rd1->reg_rules[x]; 949a62a1aedSEliad Peller for (y = 0; y < rd2->n_reg_rules; y++) { 9509c96477dSLuis R. Rodriguez rule2 = &rd2->reg_rules[y]; 95197524820SJanusz Dziedzic r = reg_rules_intersect(rd1, rd2, rule1, rule2, 952a62a1aedSEliad Peller &intersected_rule); 953fb1fc7adSLuis R. Rodriguez /* 954fb1fc7adSLuis R. Rodriguez * No need to memset here the intersected rule here as 955fb1fc7adSLuis R. Rodriguez * we're not using the stack anymore 956fb1fc7adSLuis R. Rodriguez */ 9579c96477dSLuis R. Rodriguez if (r) 9589c96477dSLuis R. Rodriguez continue; 959a62a1aedSEliad Peller 960a62a1aedSEliad Peller add_rule(&intersected_rule, rd->reg_rules, 961a62a1aedSEliad Peller &rd->n_reg_rules); 9629c96477dSLuis R. Rodriguez } 9639c96477dSLuis R. Rodriguez } 9649c96477dSLuis R. Rodriguez 9659c96477dSLuis R. Rodriguez rd->alpha2[0] = '9'; 9669c96477dSLuis R. Rodriguez rd->alpha2[1] = '8'; 967adbfb058SLuis R. Rodriguez rd->dfs_region = reg_intersect_dfs_region(rd1->dfs_region, 968adbfb058SLuis R. Rodriguez rd2->dfs_region); 9699c96477dSLuis R. Rodriguez 9709c96477dSLuis R. Rodriguez return rd; 9719c96477dSLuis R. Rodriguez } 9729c96477dSLuis R. Rodriguez 973fb1fc7adSLuis R. Rodriguez /* 974fb1fc7adSLuis R. Rodriguez * XXX: add support for the rest of enum nl80211_reg_rule_flags, we may 975fb1fc7adSLuis R. Rodriguez * want to just have the channel structure use these 976fb1fc7adSLuis R. Rodriguez */ 977b2e1b302SLuis R. Rodriguez static u32 map_regdom_flags(u32 rd_flags) 978b2e1b302SLuis R. Rodriguez { 979b2e1b302SLuis R. Rodriguez u32 channel_flags = 0; 9808fe02e16SLuis R. Rodriguez if (rd_flags & NL80211_RRF_NO_IR_ALL) 9818fe02e16SLuis R. Rodriguez channel_flags |= IEEE80211_CHAN_NO_IR; 982b2e1b302SLuis R. Rodriguez if (rd_flags & NL80211_RRF_DFS) 983b2e1b302SLuis R. Rodriguez channel_flags |= IEEE80211_CHAN_RADAR; 98403f6b084SSeth Forshee if (rd_flags & NL80211_RRF_NO_OFDM) 98503f6b084SSeth Forshee channel_flags |= IEEE80211_CHAN_NO_OFDM; 986570dbde1SDavid Spinadel if (rd_flags & NL80211_RRF_NO_OUTDOOR) 987570dbde1SDavid Spinadel channel_flags |= IEEE80211_CHAN_INDOOR_ONLY; 98806f207fcSArik Nemtsov if (rd_flags & NL80211_RRF_IR_CONCURRENT) 98906f207fcSArik Nemtsov channel_flags |= IEEE80211_CHAN_IR_CONCURRENT; 990a6d4a534SArik Nemtsov if (rd_flags & NL80211_RRF_NO_HT40MINUS) 991a6d4a534SArik Nemtsov channel_flags |= IEEE80211_CHAN_NO_HT40MINUS; 992a6d4a534SArik Nemtsov if (rd_flags & NL80211_RRF_NO_HT40PLUS) 993a6d4a534SArik Nemtsov channel_flags |= IEEE80211_CHAN_NO_HT40PLUS; 994a6d4a534SArik Nemtsov if (rd_flags & NL80211_RRF_NO_80MHZ) 995a6d4a534SArik Nemtsov channel_flags |= IEEE80211_CHAN_NO_80MHZ; 996a6d4a534SArik Nemtsov if (rd_flags & NL80211_RRF_NO_160MHZ) 997a6d4a534SArik Nemtsov channel_flags |= IEEE80211_CHAN_NO_160MHZ; 998b2e1b302SLuis R. Rodriguez return channel_flags; 999b2e1b302SLuis R. Rodriguez } 1000b2e1b302SLuis R. Rodriguez 1001361c9c8bSJohannes Berg static const struct ieee80211_reg_rule * 1002361c9c8bSJohannes Berg freq_reg_info_regd(struct wiphy *wiphy, u32 center_freq, 10034edd5698SMatthias May const struct ieee80211_regdomain *regd, u32 bw) 10048318d78aSJohannes Berg { 10058318d78aSJohannes Berg int i; 10060c7dc45dSLuis R. Rodriguez bool band_rule_found = false; 1007038659e7SLuis R. Rodriguez bool bw_fits = false; 1008038659e7SLuis R. Rodriguez 10093e0c3ff3SLuis R. Rodriguez if (!regd) 1010361c9c8bSJohannes Berg return ERR_PTR(-EINVAL); 1011b2e1b302SLuis R. Rodriguez 10123e0c3ff3SLuis R. Rodriguez for (i = 0; i < regd->n_reg_rules; i++) { 1013b2e1b302SLuis R. Rodriguez const struct ieee80211_reg_rule *rr; 1014b2e1b302SLuis R. Rodriguez const struct ieee80211_freq_range *fr = NULL; 1015b2e1b302SLuis R. Rodriguez 10163e0c3ff3SLuis R. Rodriguez rr = ®d->reg_rules[i]; 1017b2e1b302SLuis R. Rodriguez fr = &rr->freq_range; 10180c7dc45dSLuis R. Rodriguez 1019fb1fc7adSLuis R. Rodriguez /* 1020fb1fc7adSLuis R. Rodriguez * We only need to know if one frequency rule was 10210c7dc45dSLuis R. Rodriguez * was in center_freq's band, that's enough, so lets 1022fb1fc7adSLuis R. Rodriguez * not overwrite it once found 1023fb1fc7adSLuis R. Rodriguez */ 10240c7dc45dSLuis R. Rodriguez if (!band_rule_found) 10250c7dc45dSLuis R. Rodriguez band_rule_found = freq_in_rule_band(fr, center_freq); 10260c7dc45dSLuis R. Rodriguez 10274edd5698SMatthias May bw_fits = reg_does_bw_fit(fr, center_freq, bw); 10280c7dc45dSLuis R. Rodriguez 1029361c9c8bSJohannes Berg if (band_rule_found && bw_fits) 1030361c9c8bSJohannes Berg return rr; 10318318d78aSJohannes Berg } 10328318d78aSJohannes Berg 10330c7dc45dSLuis R. Rodriguez if (!band_rule_found) 1034361c9c8bSJohannes Berg return ERR_PTR(-ERANGE); 10350c7dc45dSLuis R. Rodriguez 1036361c9c8bSJohannes Berg return ERR_PTR(-EINVAL); 1037b2e1b302SLuis R. Rodriguez } 1038b2e1b302SLuis R. Rodriguez 10398de1c63bSJohannes Berg static const struct ieee80211_reg_rule * 10408de1c63bSJohannes Berg __freq_reg_info(struct wiphy *wiphy, u32 center_freq, u32 min_bw) 10414edd5698SMatthias May { 10424edd5698SMatthias May const struct ieee80211_regdomain *regd = reg_get_regdomain(wiphy); 10434edd5698SMatthias May const struct ieee80211_reg_rule *reg_rule = NULL; 10444edd5698SMatthias May u32 bw; 10454edd5698SMatthias May 10464edd5698SMatthias May for (bw = MHZ_TO_KHZ(20); bw >= min_bw; bw = bw / 2) { 10474edd5698SMatthias May reg_rule = freq_reg_info_regd(wiphy, center_freq, regd, bw); 10484edd5698SMatthias May if (!IS_ERR(reg_rule)) 10494edd5698SMatthias May return reg_rule; 10504edd5698SMatthias May } 10514edd5698SMatthias May 10524edd5698SMatthias May return reg_rule; 10534edd5698SMatthias May } 10544edd5698SMatthias May 1055361c9c8bSJohannes Berg const struct ieee80211_reg_rule *freq_reg_info(struct wiphy *wiphy, 1056361c9c8bSJohannes Berg u32 center_freq) 10571fa25e41SLuis R. Rodriguez { 10584edd5698SMatthias May return __freq_reg_info(wiphy, center_freq, MHZ_TO_KHZ(20)); 10591fa25e41SLuis R. Rodriguez } 10604f366c5dSJohn W. Linville EXPORT_SYMBOL(freq_reg_info); 1061b2e1b302SLuis R. Rodriguez 1062034c6d6eSLuis R. Rodriguez const char *reg_initiator_name(enum nl80211_reg_initiator initiator) 1063926a0a09SLuis R. Rodriguez { 1064926a0a09SLuis R. Rodriguez switch (initiator) { 1065926a0a09SLuis R. Rodriguez case NL80211_REGDOM_SET_BY_CORE: 1066034c6d6eSLuis R. Rodriguez return "core"; 1067926a0a09SLuis R. Rodriguez case NL80211_REGDOM_SET_BY_USER: 1068034c6d6eSLuis R. Rodriguez return "user"; 1069926a0a09SLuis R. Rodriguez case NL80211_REGDOM_SET_BY_DRIVER: 1070034c6d6eSLuis R. Rodriguez return "driver"; 1071926a0a09SLuis R. Rodriguez case NL80211_REGDOM_SET_BY_COUNTRY_IE: 1072034c6d6eSLuis R. Rodriguez return "country IE"; 1073926a0a09SLuis R. Rodriguez default: 1074926a0a09SLuis R. Rodriguez WARN_ON(1); 1075034c6d6eSLuis R. Rodriguez return "bug"; 1076926a0a09SLuis R. Rodriguez } 1077926a0a09SLuis R. Rodriguez } 1078034c6d6eSLuis R. Rodriguez EXPORT_SYMBOL(reg_initiator_name); 1079e702d3cfSLuis R. Rodriguez 1080034c6d6eSLuis R. Rodriguez #ifdef CONFIG_CFG80211_REG_DEBUG 1081b0dfd2eaSJanusz Dziedzic static void chan_reg_rule_print_dbg(const struct ieee80211_regdomain *regd, 1082b0dfd2eaSJanusz Dziedzic struct ieee80211_channel *chan, 1083e702d3cfSLuis R. Rodriguez const struct ieee80211_reg_rule *reg_rule) 1084e702d3cfSLuis R. Rodriguez { 1085e702d3cfSLuis R. Rodriguez const struct ieee80211_power_rule *power_rule; 1086e702d3cfSLuis R. Rodriguez const struct ieee80211_freq_range *freq_range; 1087b0dfd2eaSJanusz Dziedzic char max_antenna_gain[32], bw[32]; 1088e702d3cfSLuis R. Rodriguez 1089e702d3cfSLuis R. Rodriguez power_rule = ®_rule->power_rule; 1090e702d3cfSLuis R. Rodriguez freq_range = ®_rule->freq_range; 1091e702d3cfSLuis R. Rodriguez 1092e702d3cfSLuis R. Rodriguez if (!power_rule->max_antenna_gain) 1093b0dfd2eaSJanusz Dziedzic snprintf(max_antenna_gain, sizeof(max_antenna_gain), "N/A"); 1094e702d3cfSLuis R. Rodriguez else 1095b0dfd2eaSJanusz Dziedzic snprintf(max_antenna_gain, sizeof(max_antenna_gain), "%d", 1096b0dfd2eaSJanusz Dziedzic power_rule->max_antenna_gain); 1097b0dfd2eaSJanusz Dziedzic 1098b0dfd2eaSJanusz Dziedzic if (reg_rule->flags & NL80211_RRF_AUTO_BW) 1099b0dfd2eaSJanusz Dziedzic snprintf(bw, sizeof(bw), "%d KHz, %d KHz AUTO", 1100b0dfd2eaSJanusz Dziedzic freq_range->max_bandwidth_khz, 1101b0dfd2eaSJanusz Dziedzic reg_get_max_bandwidth(regd, reg_rule)); 1102b0dfd2eaSJanusz Dziedzic else 1103b0dfd2eaSJanusz Dziedzic snprintf(bw, sizeof(bw), "%d KHz", 1104b0dfd2eaSJanusz Dziedzic freq_range->max_bandwidth_khz); 1105e702d3cfSLuis R. Rodriguez 1106fe7ef5e9SJohannes Berg REG_DBG_PRINT("Updating information on frequency %d MHz with regulatory rule:\n", 1107fe7ef5e9SJohannes Berg chan->center_freq); 1108e702d3cfSLuis R. Rodriguez 1109b0dfd2eaSJanusz Dziedzic REG_DBG_PRINT("%d KHz - %d KHz @ %s), (%s mBi, %d mBm)\n", 11101a919318SJohannes Berg freq_range->start_freq_khz, freq_range->end_freq_khz, 1111b0dfd2eaSJanusz Dziedzic bw, max_antenna_gain, 1112e702d3cfSLuis R. Rodriguez power_rule->max_eirp); 1113e702d3cfSLuis R. Rodriguez } 1114e702d3cfSLuis R. Rodriguez #else 1115b0dfd2eaSJanusz Dziedzic static void chan_reg_rule_print_dbg(const struct ieee80211_regdomain *regd, 1116b0dfd2eaSJanusz Dziedzic struct ieee80211_channel *chan, 1117e702d3cfSLuis R. Rodriguez const struct ieee80211_reg_rule *reg_rule) 1118e702d3cfSLuis R. Rodriguez { 1119e702d3cfSLuis R. Rodriguez return; 1120e702d3cfSLuis R. Rodriguez } 1121926a0a09SLuis R. Rodriguez #endif 1122926a0a09SLuis R. Rodriguez 1123e33e2241SJohannes Berg /* 1124e33e2241SJohannes Berg * Note that right now we assume the desired channel bandwidth 1125e33e2241SJohannes Berg * is always 20 MHz for each individual channel (HT40 uses 20 MHz 1126e33e2241SJohannes Berg * per channel, the primary and the extension channel). 1127038659e7SLuis R. Rodriguez */ 11287ca43d03SLuis R. Rodriguez static void handle_channel(struct wiphy *wiphy, 11297ca43d03SLuis R. Rodriguez enum nl80211_reg_initiator initiator, 1130fdc9d7b2SJohannes Berg struct ieee80211_channel *chan) 1131b2e1b302SLuis R. Rodriguez { 1132038659e7SLuis R. Rodriguez u32 flags, bw_flags = 0; 1133b2e1b302SLuis R. Rodriguez const struct ieee80211_reg_rule *reg_rule = NULL; 1134b2e1b302SLuis R. Rodriguez const struct ieee80211_power_rule *power_rule = NULL; 1135038659e7SLuis R. Rodriguez const struct ieee80211_freq_range *freq_range = NULL; 1136fe33eb39SLuis R. Rodriguez struct wiphy *request_wiphy = NULL; 1137c492db37SJohannes Berg struct regulatory_request *lr = get_last_request(); 113897524820SJanusz Dziedzic const struct ieee80211_regdomain *regd; 113997524820SJanusz Dziedzic u32 max_bandwidth_khz; 1140a92a3ce7SLuis R. Rodriguez 1141c492db37SJohannes Berg request_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx); 1142a92a3ce7SLuis R. Rodriguez 1143a92a3ce7SLuis R. Rodriguez flags = chan->orig_flags; 1144b2e1b302SLuis R. Rodriguez 1145361c9c8bSJohannes Berg reg_rule = freq_reg_info(wiphy, MHZ_TO_KHZ(chan->center_freq)); 1146361c9c8bSJohannes Berg if (IS_ERR(reg_rule)) { 1147ca4ffe8fSLuis R. Rodriguez /* 1148ca4ffe8fSLuis R. Rodriguez * We will disable all channels that do not match our 114925985edcSLucas De Marchi * received regulatory rule unless the hint is coming 1150ca4ffe8fSLuis R. Rodriguez * from a Country IE and the Country IE had no information 1151ca4ffe8fSLuis R. Rodriguez * about a band. The IEEE 802.11 spec allows for an AP 1152ca4ffe8fSLuis R. Rodriguez * to send only a subset of the regulatory rules allowed, 1153ca4ffe8fSLuis R. Rodriguez * so an AP in the US that only supports 2.4 GHz may only send 1154ca4ffe8fSLuis R. Rodriguez * a country IE with information for the 2.4 GHz band 1155ca4ffe8fSLuis R. Rodriguez * while 5 GHz is still supported. 1156ca4ffe8fSLuis R. Rodriguez */ 1157ca4ffe8fSLuis R. Rodriguez if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE && 1158361c9c8bSJohannes Berg PTR_ERR(reg_rule) == -ERANGE) 11598318d78aSJohannes Berg return; 11608318d78aSJohannes Berg 1161cc493e4fSLuis R. Rodriguez if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER && 1162cc493e4fSLuis R. Rodriguez request_wiphy && request_wiphy == wiphy && 1163a2f73b6cSLuis R. Rodriguez request_wiphy->regulatory_flags & REGULATORY_STRICT_REG) { 1164cc493e4fSLuis R. Rodriguez REG_DBG_PRINT("Disabling freq %d MHz for good\n", 1165cc493e4fSLuis R. Rodriguez chan->center_freq); 1166cc493e4fSLuis R. Rodriguez chan->orig_flags |= IEEE80211_CHAN_DISABLED; 1167cc493e4fSLuis R. Rodriguez chan->flags = chan->orig_flags; 1168cc493e4fSLuis R. Rodriguez } else { 1169cc493e4fSLuis R. Rodriguez REG_DBG_PRINT("Disabling freq %d MHz\n", 1170cc493e4fSLuis R. Rodriguez chan->center_freq); 1171990de49fSJohannes Berg chan->flags |= IEEE80211_CHAN_DISABLED; 1172cc493e4fSLuis R. Rodriguez } 1173ca4ffe8fSLuis R. Rodriguez return; 1174ca4ffe8fSLuis R. Rodriguez } 1175ca4ffe8fSLuis R. Rodriguez 1176b0dfd2eaSJanusz Dziedzic regd = reg_get_regdomain(wiphy); 1177b0dfd2eaSJanusz Dziedzic chan_reg_rule_print_dbg(regd, chan, reg_rule); 1178e702d3cfSLuis R. Rodriguez 1179b2e1b302SLuis R. Rodriguez power_rule = ®_rule->power_rule; 1180038659e7SLuis R. Rodriguez freq_range = ®_rule->freq_range; 1181038659e7SLuis R. Rodriguez 118297524820SJanusz Dziedzic max_bandwidth_khz = freq_range->max_bandwidth_khz; 118397524820SJanusz Dziedzic /* Check if auto calculation requested */ 1184b0dfd2eaSJanusz Dziedzic if (reg_rule->flags & NL80211_RRF_AUTO_BW) 118597524820SJanusz Dziedzic max_bandwidth_khz = reg_get_max_bandwidth(regd, reg_rule); 118697524820SJanusz Dziedzic 11874edd5698SMatthias May /* If we get a reg_rule we can assume that at least 5Mhz fit */ 11884edd5698SMatthias May if (!reg_does_bw_fit(freq_range, MHZ_TO_KHZ(chan->center_freq), 11894edd5698SMatthias May MHZ_TO_KHZ(10))) 11904edd5698SMatthias May bw_flags |= IEEE80211_CHAN_NO_10MHZ; 11914edd5698SMatthias May if (!reg_does_bw_fit(freq_range, MHZ_TO_KHZ(chan->center_freq), 11924edd5698SMatthias May MHZ_TO_KHZ(20))) 11934edd5698SMatthias May bw_flags |= IEEE80211_CHAN_NO_20MHZ; 11944edd5698SMatthias May 11954edd5698SMatthias May if (max_bandwidth_khz < MHZ_TO_KHZ(10)) 11964edd5698SMatthias May bw_flags |= IEEE80211_CHAN_NO_10MHZ; 11974edd5698SMatthias May if (max_bandwidth_khz < MHZ_TO_KHZ(20)) 11984edd5698SMatthias May bw_flags |= IEEE80211_CHAN_NO_20MHZ; 119997524820SJanusz Dziedzic if (max_bandwidth_khz < MHZ_TO_KHZ(40)) 12004edd5698SMatthias May bw_flags |= IEEE80211_CHAN_NO_HT40; 120197524820SJanusz Dziedzic if (max_bandwidth_khz < MHZ_TO_KHZ(80)) 1202c7a6ee27SJohannes Berg bw_flags |= IEEE80211_CHAN_NO_80MHZ; 120397524820SJanusz Dziedzic if (max_bandwidth_khz < MHZ_TO_KHZ(160)) 1204c7a6ee27SJohannes Berg bw_flags |= IEEE80211_CHAN_NO_160MHZ; 1205b2e1b302SLuis R. Rodriguez 1206c492db37SJohannes Berg if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER && 1207806a9e39SLuis R. Rodriguez request_wiphy && request_wiphy == wiphy && 1208a2f73b6cSLuis R. Rodriguez request_wiphy->regulatory_flags & REGULATORY_STRICT_REG) { 1209fb1fc7adSLuis R. Rodriguez /* 121025985edcSLucas De Marchi * This guarantees the driver's requested regulatory domain 1211f976376dSLuis R. Rodriguez * will always be used as a base for further regulatory 1212fb1fc7adSLuis R. Rodriguez * settings 1213fb1fc7adSLuis R. Rodriguez */ 1214f976376dSLuis R. Rodriguez chan->flags = chan->orig_flags = 1215038659e7SLuis R. Rodriguez map_regdom_flags(reg_rule->flags) | bw_flags; 1216f976376dSLuis R. Rodriguez chan->max_antenna_gain = chan->orig_mag = 1217f976376dSLuis R. Rodriguez (int) MBI_TO_DBI(power_rule->max_antenna_gain); 1218279f0f55SFelix Fietkau chan->max_reg_power = chan->max_power = chan->orig_mpwr = 1219f976376dSLuis R. Rodriguez (int) MBM_TO_DBM(power_rule->max_eirp); 12204f267c11SJanusz Dziedzic 12214f267c11SJanusz Dziedzic if (chan->flags & IEEE80211_CHAN_RADAR) { 12224f267c11SJanusz Dziedzic chan->dfs_cac_ms = IEEE80211_DFS_MIN_CAC_TIME_MS; 12234f267c11SJanusz Dziedzic if (reg_rule->dfs_cac_ms) 12244f267c11SJanusz Dziedzic chan->dfs_cac_ms = reg_rule->dfs_cac_ms; 12254f267c11SJanusz Dziedzic } 12264f267c11SJanusz Dziedzic 1227f976376dSLuis R. Rodriguez return; 1228f976376dSLuis R. Rodriguez } 1229f976376dSLuis R. Rodriguez 123004f39047SSimon Wunderlich chan->dfs_state = NL80211_DFS_USABLE; 123104f39047SSimon Wunderlich chan->dfs_state_entered = jiffies; 123204f39047SSimon Wunderlich 1233aa3d7eefSRajkumar Manoharan chan->beacon_found = false; 1234038659e7SLuis R. Rodriguez chan->flags = flags | bw_flags | map_regdom_flags(reg_rule->flags); 12351a919318SJohannes Berg chan->max_antenna_gain = 12361a919318SJohannes Berg min_t(int, chan->orig_mag, 12371a919318SJohannes Berg MBI_TO_DBI(power_rule->max_antenna_gain)); 1238eccc068eSHong Wu chan->max_reg_power = (int) MBM_TO_DBM(power_rule->max_eirp); 1239089027e5SJanusz Dziedzic 1240089027e5SJanusz Dziedzic if (chan->flags & IEEE80211_CHAN_RADAR) { 1241089027e5SJanusz Dziedzic if (reg_rule->dfs_cac_ms) 1242089027e5SJanusz Dziedzic chan->dfs_cac_ms = reg_rule->dfs_cac_ms; 1243089027e5SJanusz Dziedzic else 1244089027e5SJanusz Dziedzic chan->dfs_cac_ms = IEEE80211_DFS_MIN_CAC_TIME_MS; 1245089027e5SJanusz Dziedzic } 1246089027e5SJanusz Dziedzic 12475e31fc08SStanislaw Gruszka if (chan->orig_mpwr) { 12485e31fc08SStanislaw Gruszka /* 1249a09a85a0SLuis R. Rodriguez * Devices that use REGULATORY_COUNTRY_IE_FOLLOW_POWER 1250a09a85a0SLuis R. Rodriguez * will always follow the passed country IE power settings. 12515e31fc08SStanislaw Gruszka */ 12525e31fc08SStanislaw Gruszka if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE && 1253a09a85a0SLuis R. Rodriguez wiphy->regulatory_flags & REGULATORY_COUNTRY_IE_FOLLOW_POWER) 12545e31fc08SStanislaw Gruszka chan->max_power = chan->max_reg_power; 12555e31fc08SStanislaw Gruszka else 12565e31fc08SStanislaw Gruszka chan->max_power = min(chan->orig_mpwr, 12575e31fc08SStanislaw Gruszka chan->max_reg_power); 12585e31fc08SStanislaw Gruszka } else 12595e31fc08SStanislaw Gruszka chan->max_power = chan->max_reg_power; 12608318d78aSJohannes Berg } 12618318d78aSJohannes Berg 12627ca43d03SLuis R. Rodriguez static void handle_band(struct wiphy *wiphy, 1263fdc9d7b2SJohannes Berg enum nl80211_reg_initiator initiator, 1264fdc9d7b2SJohannes Berg struct ieee80211_supported_band *sband) 12658318d78aSJohannes Berg { 1266a92a3ce7SLuis R. Rodriguez unsigned int i; 1267a92a3ce7SLuis R. Rodriguez 1268fdc9d7b2SJohannes Berg if (!sband) 1269fdc9d7b2SJohannes Berg return; 12708318d78aSJohannes Berg 12718318d78aSJohannes Berg for (i = 0; i < sband->n_channels; i++) 1272fdc9d7b2SJohannes Berg handle_channel(wiphy, initiator, &sband->channels[i]); 12738318d78aSJohannes Berg } 12748318d78aSJohannes Berg 127557b5ce07SLuis R. Rodriguez static bool reg_request_cell_base(struct regulatory_request *request) 127657b5ce07SLuis R. Rodriguez { 127757b5ce07SLuis R. Rodriguez if (request->initiator != NL80211_REGDOM_SET_BY_USER) 127857b5ce07SLuis R. Rodriguez return false; 12791a919318SJohannes Berg return request->user_reg_hint_type == NL80211_USER_REG_HINT_CELL_BASE; 128057b5ce07SLuis R. Rodriguez } 128157b5ce07SLuis R. Rodriguez 128257b5ce07SLuis R. Rodriguez bool reg_last_request_cell_base(void) 128357b5ce07SLuis R. Rodriguez { 128438fd2143SJohannes Berg return reg_request_cell_base(get_last_request()); 128557b5ce07SLuis R. Rodriguez } 128657b5ce07SLuis R. Rodriguez 128794fc661fSIlan Peer #ifdef CONFIG_CFG80211_REG_CELLULAR_HINTS 128857b5ce07SLuis R. Rodriguez /* Core specific check */ 12892f92212bSJohannes Berg static enum reg_request_treatment 12902f92212bSJohannes Berg reg_ignore_cell_hint(struct regulatory_request *pending_request) 129157b5ce07SLuis R. Rodriguez { 1292c492db37SJohannes Berg struct regulatory_request *lr = get_last_request(); 129357b5ce07SLuis R. Rodriguez 129457b5ce07SLuis R. Rodriguez if (!reg_num_devs_support_basehint) 12952f92212bSJohannes Berg return REG_REQ_IGNORE; 129657b5ce07SLuis R. Rodriguez 1297c492db37SJohannes Berg if (reg_request_cell_base(lr) && 12981a919318SJohannes Berg !regdom_changes(pending_request->alpha2)) 12992f92212bSJohannes Berg return REG_REQ_ALREADY_SET; 13001a919318SJohannes Berg 13012f92212bSJohannes Berg return REG_REQ_OK; 130257b5ce07SLuis R. Rodriguez } 130357b5ce07SLuis R. Rodriguez 130457b5ce07SLuis R. Rodriguez /* Device specific check */ 130557b5ce07SLuis R. Rodriguez static bool reg_dev_ignore_cell_hint(struct wiphy *wiphy) 130657b5ce07SLuis R. Rodriguez { 13071a919318SJohannes Berg return !(wiphy->features & NL80211_FEATURE_CELL_BASE_REG_HINTS); 130857b5ce07SLuis R. Rodriguez } 130957b5ce07SLuis R. Rodriguez #else 131057b5ce07SLuis R. Rodriguez static int reg_ignore_cell_hint(struct regulatory_request *pending_request) 131157b5ce07SLuis R. Rodriguez { 13122f92212bSJohannes Berg return REG_REQ_IGNORE; 131357b5ce07SLuis R. Rodriguez } 13141a919318SJohannes Berg 13151a919318SJohannes Berg static bool reg_dev_ignore_cell_hint(struct wiphy *wiphy) 131657b5ce07SLuis R. Rodriguez { 131757b5ce07SLuis R. Rodriguez return true; 131857b5ce07SLuis R. Rodriguez } 131957b5ce07SLuis R. Rodriguez #endif 132057b5ce07SLuis R. Rodriguez 1321fa1fb9cbSLuis R. Rodriguez static bool wiphy_strict_alpha2_regd(struct wiphy *wiphy) 1322fa1fb9cbSLuis R. Rodriguez { 1323a2f73b6cSLuis R. Rodriguez if (wiphy->regulatory_flags & REGULATORY_STRICT_REG && 1324a2f73b6cSLuis R. Rodriguez !(wiphy->regulatory_flags & REGULATORY_CUSTOM_REG)) 1325fa1fb9cbSLuis R. Rodriguez return true; 1326fa1fb9cbSLuis R. Rodriguez return false; 1327fa1fb9cbSLuis R. Rodriguez } 132857b5ce07SLuis R. Rodriguez 13297db90f4aSLuis R. Rodriguez static bool ignore_reg_update(struct wiphy *wiphy, 13307db90f4aSLuis R. Rodriguez enum nl80211_reg_initiator initiator) 133114b9815aSLuis R. Rodriguez { 1332c492db37SJohannes Berg struct regulatory_request *lr = get_last_request(); 1333c492db37SJohannes Berg 1334b0d7aa59SJonathan Doron if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) 1335b0d7aa59SJonathan Doron return true; 1336b0d7aa59SJonathan Doron 1337c492db37SJohannes Berg if (!lr) { 1338034c6d6eSLuis R. Rodriguez REG_DBG_PRINT("Ignoring regulatory request set by %s " 1339034c6d6eSLuis R. Rodriguez "since last_request is not set\n", 1340926a0a09SLuis R. Rodriguez reg_initiator_name(initiator)); 134114b9815aSLuis R. Rodriguez return true; 1342926a0a09SLuis R. Rodriguez } 1343926a0a09SLuis R. Rodriguez 13447db90f4aSLuis R. Rodriguez if (initiator == NL80211_REGDOM_SET_BY_CORE && 1345a2f73b6cSLuis R. Rodriguez wiphy->regulatory_flags & REGULATORY_CUSTOM_REG) { 1346034c6d6eSLuis R. Rodriguez REG_DBG_PRINT("Ignoring regulatory request set by %s " 1347034c6d6eSLuis R. Rodriguez "since the driver uses its own custom " 1348034c6d6eSLuis R. Rodriguez "regulatory domain\n", 1349926a0a09SLuis R. Rodriguez reg_initiator_name(initiator)); 135014b9815aSLuis R. Rodriguez return true; 1351926a0a09SLuis R. Rodriguez } 1352926a0a09SLuis R. Rodriguez 1353fb1fc7adSLuis R. Rodriguez /* 1354fb1fc7adSLuis R. Rodriguez * wiphy->regd will be set once the device has its own 1355fb1fc7adSLuis R. Rodriguez * desired regulatory domain set 1356fb1fc7adSLuis R. Rodriguez */ 1357fa1fb9cbSLuis R. Rodriguez if (wiphy_strict_alpha2_regd(wiphy) && !wiphy->regd && 1358749b527bSLuis R. Rodriguez initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && 1359c492db37SJohannes Berg !is_world_regdom(lr->alpha2)) { 1360034c6d6eSLuis R. Rodriguez REG_DBG_PRINT("Ignoring regulatory request set by %s " 1361034c6d6eSLuis R. Rodriguez "since the driver requires its own regulatory " 1362034c6d6eSLuis R. Rodriguez "domain to be set first\n", 1363926a0a09SLuis R. Rodriguez reg_initiator_name(initiator)); 136414b9815aSLuis R. Rodriguez return true; 1365926a0a09SLuis R. Rodriguez } 1366926a0a09SLuis R. Rodriguez 1367c492db37SJohannes Berg if (reg_request_cell_base(lr)) 136857b5ce07SLuis R. Rodriguez return reg_dev_ignore_cell_hint(wiphy); 136957b5ce07SLuis R. Rodriguez 137014b9815aSLuis R. Rodriguez return false; 137114b9815aSLuis R. Rodriguez } 137214b9815aSLuis R. Rodriguez 13733195e489SLuis R. Rodriguez static bool reg_is_world_roaming(struct wiphy *wiphy) 13743195e489SLuis R. Rodriguez { 13753195e489SLuis R. Rodriguez const struct ieee80211_regdomain *cr = get_cfg80211_regdom(); 13763195e489SLuis R. Rodriguez const struct ieee80211_regdomain *wr = get_wiphy_regdom(wiphy); 13773195e489SLuis R. Rodriguez struct regulatory_request *lr = get_last_request(); 13783195e489SLuis R. Rodriguez 13793195e489SLuis R. Rodriguez if (is_world_regdom(cr->alpha2) || (wr && is_world_regdom(wr->alpha2))) 13803195e489SLuis R. Rodriguez return true; 13813195e489SLuis R. Rodriguez 13823195e489SLuis R. Rodriguez if (lr && lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && 1383a2f73b6cSLuis R. Rodriguez wiphy->regulatory_flags & REGULATORY_CUSTOM_REG) 13843195e489SLuis R. Rodriguez return true; 13853195e489SLuis R. Rodriguez 13863195e489SLuis R. Rodriguez return false; 13873195e489SLuis R. Rodriguez } 13883195e489SLuis R. Rodriguez 13891a919318SJohannes Berg static void handle_reg_beacon(struct wiphy *wiphy, unsigned int chan_idx, 1390e38f8a7aSLuis R. Rodriguez struct reg_beacon *reg_beacon) 1391e38f8a7aSLuis R. Rodriguez { 1392e38f8a7aSLuis R. Rodriguez struct ieee80211_supported_band *sband; 1393e38f8a7aSLuis R. Rodriguez struct ieee80211_channel *chan; 13946bad8766SLuis R. Rodriguez bool channel_changed = false; 13956bad8766SLuis R. Rodriguez struct ieee80211_channel chan_before; 1396e38f8a7aSLuis R. Rodriguez 1397e38f8a7aSLuis R. Rodriguez sband = wiphy->bands[reg_beacon->chan.band]; 1398e38f8a7aSLuis R. Rodriguez chan = &sband->channels[chan_idx]; 1399e38f8a7aSLuis R. Rodriguez 1400e38f8a7aSLuis R. Rodriguez if (likely(chan->center_freq != reg_beacon->chan.center_freq)) 1401e38f8a7aSLuis R. Rodriguez return; 1402e38f8a7aSLuis R. Rodriguez 14036bad8766SLuis R. Rodriguez if (chan->beacon_found) 14046bad8766SLuis R. Rodriguez return; 14056bad8766SLuis R. Rodriguez 14066bad8766SLuis R. Rodriguez chan->beacon_found = true; 14076bad8766SLuis R. Rodriguez 14080f500a5fSLuis R. Rodriguez if (!reg_is_world_roaming(wiphy)) 14090f500a5fSLuis R. Rodriguez return; 14100f500a5fSLuis R. Rodriguez 1411a2f73b6cSLuis R. Rodriguez if (wiphy->regulatory_flags & REGULATORY_DISABLE_BEACON_HINTS) 141237184244SLuis R. Rodriguez return; 141337184244SLuis R. Rodriguez 14146bad8766SLuis R. Rodriguez chan_before.center_freq = chan->center_freq; 14156bad8766SLuis R. Rodriguez chan_before.flags = chan->flags; 14166bad8766SLuis R. Rodriguez 14178fe02e16SLuis R. Rodriguez if (chan->flags & IEEE80211_CHAN_NO_IR) { 14188fe02e16SLuis R. Rodriguez chan->flags &= ~IEEE80211_CHAN_NO_IR; 14196bad8766SLuis R. Rodriguez channel_changed = true; 1420e38f8a7aSLuis R. Rodriguez } 1421e38f8a7aSLuis R. Rodriguez 14226bad8766SLuis R. Rodriguez if (channel_changed) 14236bad8766SLuis R. Rodriguez nl80211_send_beacon_hint_event(wiphy, &chan_before, chan); 1424e38f8a7aSLuis R. Rodriguez } 1425e38f8a7aSLuis R. Rodriguez 1426e38f8a7aSLuis R. Rodriguez /* 1427e38f8a7aSLuis R. Rodriguez * Called when a scan on a wiphy finds a beacon on 1428e38f8a7aSLuis R. Rodriguez * new channel 1429e38f8a7aSLuis R. Rodriguez */ 1430e38f8a7aSLuis R. Rodriguez static void wiphy_update_new_beacon(struct wiphy *wiphy, 1431e38f8a7aSLuis R. Rodriguez struct reg_beacon *reg_beacon) 1432e38f8a7aSLuis R. Rodriguez { 1433e38f8a7aSLuis R. Rodriguez unsigned int i; 1434e38f8a7aSLuis R. Rodriguez struct ieee80211_supported_band *sband; 1435e38f8a7aSLuis R. Rodriguez 1436e38f8a7aSLuis R. Rodriguez if (!wiphy->bands[reg_beacon->chan.band]) 1437e38f8a7aSLuis R. Rodriguez return; 1438e38f8a7aSLuis R. Rodriguez 1439e38f8a7aSLuis R. Rodriguez sband = wiphy->bands[reg_beacon->chan.band]; 1440e38f8a7aSLuis R. Rodriguez 1441e38f8a7aSLuis R. Rodriguez for (i = 0; i < sband->n_channels; i++) 1442e38f8a7aSLuis R. Rodriguez handle_reg_beacon(wiphy, i, reg_beacon); 1443e38f8a7aSLuis R. Rodriguez } 1444e38f8a7aSLuis R. Rodriguez 1445e38f8a7aSLuis R. Rodriguez /* 1446e38f8a7aSLuis R. Rodriguez * Called upon reg changes or a new wiphy is added 1447e38f8a7aSLuis R. Rodriguez */ 1448e38f8a7aSLuis R. Rodriguez static void wiphy_update_beacon_reg(struct wiphy *wiphy) 1449e38f8a7aSLuis R. Rodriguez { 1450e38f8a7aSLuis R. Rodriguez unsigned int i; 1451e38f8a7aSLuis R. Rodriguez struct ieee80211_supported_band *sband; 1452e38f8a7aSLuis R. Rodriguez struct reg_beacon *reg_beacon; 1453e38f8a7aSLuis R. Rodriguez 1454e38f8a7aSLuis R. Rodriguez list_for_each_entry(reg_beacon, ®_beacon_list, list) { 1455e38f8a7aSLuis R. Rodriguez if (!wiphy->bands[reg_beacon->chan.band]) 1456e38f8a7aSLuis R. Rodriguez continue; 1457e38f8a7aSLuis R. Rodriguez sband = wiphy->bands[reg_beacon->chan.band]; 1458e38f8a7aSLuis R. Rodriguez for (i = 0; i < sband->n_channels; i++) 1459e38f8a7aSLuis R. Rodriguez handle_reg_beacon(wiphy, i, reg_beacon); 1460e38f8a7aSLuis R. Rodriguez } 1461e38f8a7aSLuis R. Rodriguez } 1462e38f8a7aSLuis R. Rodriguez 1463e38f8a7aSLuis R. Rodriguez /* Reap the advantages of previously found beacons */ 1464e38f8a7aSLuis R. Rodriguez static void reg_process_beacons(struct wiphy *wiphy) 1465e38f8a7aSLuis R. Rodriguez { 1466b1ed8dddSLuis R. Rodriguez /* 1467b1ed8dddSLuis R. Rodriguez * Means we are just firing up cfg80211, so no beacons would 1468b1ed8dddSLuis R. Rodriguez * have been processed yet. 1469b1ed8dddSLuis R. Rodriguez */ 1470b1ed8dddSLuis R. Rodriguez if (!last_request) 1471b1ed8dddSLuis R. Rodriguez return; 1472e38f8a7aSLuis R. Rodriguez wiphy_update_beacon_reg(wiphy); 1473e38f8a7aSLuis R. Rodriguez } 1474e38f8a7aSLuis R. Rodriguez 14751a919318SJohannes Berg static bool is_ht40_allowed(struct ieee80211_channel *chan) 1476038659e7SLuis R. Rodriguez { 1477038659e7SLuis R. Rodriguez if (!chan) 1478038659e7SLuis R. Rodriguez return false; 14791a919318SJohannes Berg if (chan->flags & IEEE80211_CHAN_DISABLED) 14801a919318SJohannes Berg return false; 14811a919318SJohannes Berg /* This would happen when regulatory rules disallow HT40 completely */ 148255b183adSFelix Fietkau if ((chan->flags & IEEE80211_CHAN_NO_HT40) == IEEE80211_CHAN_NO_HT40) 148355b183adSFelix Fietkau return false; 148455b183adSFelix Fietkau return true; 1485038659e7SLuis R. Rodriguez } 1486038659e7SLuis R. Rodriguez 1487038659e7SLuis R. Rodriguez static void reg_process_ht_flags_channel(struct wiphy *wiphy, 1488fdc9d7b2SJohannes Berg struct ieee80211_channel *channel) 1489038659e7SLuis R. Rodriguez { 1490fdc9d7b2SJohannes Berg struct ieee80211_supported_band *sband = wiphy->bands[channel->band]; 1491038659e7SLuis R. Rodriguez struct ieee80211_channel *channel_before = NULL, *channel_after = NULL; 1492038659e7SLuis R. Rodriguez unsigned int i; 1493038659e7SLuis R. Rodriguez 14941a919318SJohannes Berg if (!is_ht40_allowed(channel)) { 1495038659e7SLuis R. Rodriguez channel->flags |= IEEE80211_CHAN_NO_HT40; 1496038659e7SLuis R. Rodriguez return; 1497038659e7SLuis R. Rodriguez } 1498038659e7SLuis R. Rodriguez 1499038659e7SLuis R. Rodriguez /* 1500038659e7SLuis R. Rodriguez * We need to ensure the extension channels exist to 1501038659e7SLuis R. Rodriguez * be able to use HT40- or HT40+, this finds them (or not) 1502038659e7SLuis R. Rodriguez */ 1503038659e7SLuis R. Rodriguez for (i = 0; i < sband->n_channels; i++) { 1504038659e7SLuis R. Rodriguez struct ieee80211_channel *c = &sband->channels[i]; 15051a919318SJohannes Berg 1506038659e7SLuis R. Rodriguez if (c->center_freq == (channel->center_freq - 20)) 1507038659e7SLuis R. Rodriguez channel_before = c; 1508038659e7SLuis R. Rodriguez if (c->center_freq == (channel->center_freq + 20)) 1509038659e7SLuis R. Rodriguez channel_after = c; 1510038659e7SLuis R. Rodriguez } 1511038659e7SLuis R. Rodriguez 1512038659e7SLuis R. Rodriguez /* 1513038659e7SLuis R. Rodriguez * Please note that this assumes target bandwidth is 20 MHz, 1514038659e7SLuis R. Rodriguez * if that ever changes we also need to change the below logic 1515038659e7SLuis R. Rodriguez * to include that as well. 1516038659e7SLuis R. Rodriguez */ 15171a919318SJohannes Berg if (!is_ht40_allowed(channel_before)) 1518689da1b3SLuis R. Rodriguez channel->flags |= IEEE80211_CHAN_NO_HT40MINUS; 1519038659e7SLuis R. Rodriguez else 1520689da1b3SLuis R. Rodriguez channel->flags &= ~IEEE80211_CHAN_NO_HT40MINUS; 1521038659e7SLuis R. Rodriguez 15221a919318SJohannes Berg if (!is_ht40_allowed(channel_after)) 1523689da1b3SLuis R. Rodriguez channel->flags |= IEEE80211_CHAN_NO_HT40PLUS; 1524038659e7SLuis R. Rodriguez else 1525689da1b3SLuis R. Rodriguez channel->flags &= ~IEEE80211_CHAN_NO_HT40PLUS; 1526038659e7SLuis R. Rodriguez } 1527038659e7SLuis R. Rodriguez 1528038659e7SLuis R. Rodriguez static void reg_process_ht_flags_band(struct wiphy *wiphy, 1529fdc9d7b2SJohannes Berg struct ieee80211_supported_band *sband) 1530038659e7SLuis R. Rodriguez { 1531038659e7SLuis R. Rodriguez unsigned int i; 1532038659e7SLuis R. Rodriguez 1533fdc9d7b2SJohannes Berg if (!sband) 1534fdc9d7b2SJohannes Berg return; 1535038659e7SLuis R. Rodriguez 1536038659e7SLuis R. Rodriguez for (i = 0; i < sband->n_channels; i++) 1537fdc9d7b2SJohannes Berg reg_process_ht_flags_channel(wiphy, &sband->channels[i]); 1538038659e7SLuis R. Rodriguez } 1539038659e7SLuis R. Rodriguez 1540038659e7SLuis R. Rodriguez static void reg_process_ht_flags(struct wiphy *wiphy) 1541038659e7SLuis R. Rodriguez { 1542038659e7SLuis R. Rodriguez enum ieee80211_band band; 1543038659e7SLuis R. Rodriguez 1544038659e7SLuis R. Rodriguez if (!wiphy) 1545038659e7SLuis R. Rodriguez return; 1546038659e7SLuis R. Rodriguez 1547fdc9d7b2SJohannes Berg for (band = 0; band < IEEE80211_NUM_BANDS; band++) 1548fdc9d7b2SJohannes Berg reg_process_ht_flags_band(wiphy, wiphy->bands[band]); 1549038659e7SLuis R. Rodriguez } 1550038659e7SLuis R. Rodriguez 15510e3802dbSLuis R. Rodriguez static void reg_call_notifier(struct wiphy *wiphy, 15520e3802dbSLuis R. Rodriguez struct regulatory_request *request) 15530e3802dbSLuis R. Rodriguez { 15540e3802dbSLuis R. Rodriguez if (wiphy->reg_notifier) 15550e3802dbSLuis R. Rodriguez wiphy->reg_notifier(wiphy, request); 15560e3802dbSLuis R. Rodriguez } 15570e3802dbSLuis R. Rodriguez 1558ad932f04SArik Nemtsov static bool reg_wdev_chan_valid(struct wiphy *wiphy, struct wireless_dev *wdev) 1559ad932f04SArik Nemtsov { 1560ad932f04SArik Nemtsov struct cfg80211_chan_def chandef; 1561ad932f04SArik Nemtsov struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); 156220658702SArik Nemtsov enum nl80211_iftype iftype; 1563ad932f04SArik Nemtsov 1564ad932f04SArik Nemtsov wdev_lock(wdev); 156520658702SArik Nemtsov iftype = wdev->iftype; 1566ad932f04SArik Nemtsov 156720658702SArik Nemtsov /* make sure the interface is active */ 1568ad932f04SArik Nemtsov if (!wdev->netdev || !netif_running(wdev->netdev)) 156920658702SArik Nemtsov goto wdev_inactive_unlock; 1570ad932f04SArik Nemtsov 157120658702SArik Nemtsov switch (iftype) { 1572ad932f04SArik Nemtsov case NL80211_IFTYPE_AP: 1573ad932f04SArik Nemtsov case NL80211_IFTYPE_P2P_GO: 1574ad932f04SArik Nemtsov if (!wdev->beacon_interval) 157520658702SArik Nemtsov goto wdev_inactive_unlock; 157620658702SArik Nemtsov chandef = wdev->chandef; 1577ad932f04SArik Nemtsov break; 1578185076d6SArik Nemtsov case NL80211_IFTYPE_ADHOC: 1579185076d6SArik Nemtsov if (!wdev->ssid_len) 158020658702SArik Nemtsov goto wdev_inactive_unlock; 158120658702SArik Nemtsov chandef = wdev->chandef; 1582185076d6SArik Nemtsov break; 1583ad932f04SArik Nemtsov case NL80211_IFTYPE_STATION: 1584ad932f04SArik Nemtsov case NL80211_IFTYPE_P2P_CLIENT: 1585ad932f04SArik Nemtsov if (!wdev->current_bss || 1586ad932f04SArik Nemtsov !wdev->current_bss->pub.channel) 158720658702SArik Nemtsov goto wdev_inactive_unlock; 1588ad932f04SArik Nemtsov 158920658702SArik Nemtsov if (!rdev->ops->get_channel || 159020658702SArik Nemtsov rdev_get_channel(rdev, wdev, &chandef)) 159120658702SArik Nemtsov cfg80211_chandef_create(&chandef, 159220658702SArik Nemtsov wdev->current_bss->pub.channel, 159320658702SArik Nemtsov NL80211_CHAN_NO_HT); 1594ad932f04SArik Nemtsov break; 1595ad932f04SArik Nemtsov case NL80211_IFTYPE_MONITOR: 1596ad932f04SArik Nemtsov case NL80211_IFTYPE_AP_VLAN: 1597ad932f04SArik Nemtsov case NL80211_IFTYPE_P2P_DEVICE: 1598ad932f04SArik Nemtsov /* no enforcement required */ 1599ad932f04SArik Nemtsov break; 1600ad932f04SArik Nemtsov default: 1601ad932f04SArik Nemtsov /* others not implemented for now */ 1602ad932f04SArik Nemtsov WARN_ON(1); 1603ad932f04SArik Nemtsov break; 1604ad932f04SArik Nemtsov } 1605ad932f04SArik Nemtsov 1606ad932f04SArik Nemtsov wdev_unlock(wdev); 160720658702SArik Nemtsov 160820658702SArik Nemtsov switch (iftype) { 160920658702SArik Nemtsov case NL80211_IFTYPE_AP: 161020658702SArik Nemtsov case NL80211_IFTYPE_P2P_GO: 161120658702SArik Nemtsov case NL80211_IFTYPE_ADHOC: 1612923b352fSArik Nemtsov return cfg80211_reg_can_beacon_relax(wiphy, &chandef, iftype); 161320658702SArik Nemtsov case NL80211_IFTYPE_STATION: 161420658702SArik Nemtsov case NL80211_IFTYPE_P2P_CLIENT: 161520658702SArik Nemtsov return cfg80211_chandef_usable(wiphy, &chandef, 161620658702SArik Nemtsov IEEE80211_CHAN_DISABLED); 161720658702SArik Nemtsov default: 161820658702SArik Nemtsov break; 161920658702SArik Nemtsov } 162020658702SArik Nemtsov 162120658702SArik Nemtsov return true; 162220658702SArik Nemtsov 162320658702SArik Nemtsov wdev_inactive_unlock: 162420658702SArik Nemtsov wdev_unlock(wdev); 162520658702SArik Nemtsov return true; 1626ad932f04SArik Nemtsov } 1627ad932f04SArik Nemtsov 1628ad932f04SArik Nemtsov static void reg_leave_invalid_chans(struct wiphy *wiphy) 1629ad932f04SArik Nemtsov { 1630ad932f04SArik Nemtsov struct wireless_dev *wdev; 1631ad932f04SArik Nemtsov struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); 1632ad932f04SArik Nemtsov 1633ad932f04SArik Nemtsov ASSERT_RTNL(); 1634ad932f04SArik Nemtsov 1635ad932f04SArik Nemtsov list_for_each_entry(wdev, &rdev->wdev_list, list) 1636ad932f04SArik Nemtsov if (!reg_wdev_chan_valid(wiphy, wdev)) 1637ad932f04SArik Nemtsov cfg80211_leave(rdev, wdev); 1638ad932f04SArik Nemtsov } 1639ad932f04SArik Nemtsov 1640ad932f04SArik Nemtsov static void reg_check_chans_work(struct work_struct *work) 1641ad932f04SArik Nemtsov { 1642ad932f04SArik Nemtsov struct cfg80211_registered_device *rdev; 1643ad932f04SArik Nemtsov 1644ad932f04SArik Nemtsov REG_DBG_PRINT("Verifying active interfaces after reg change\n"); 1645ad932f04SArik Nemtsov rtnl_lock(); 1646ad932f04SArik Nemtsov 1647ad932f04SArik Nemtsov list_for_each_entry(rdev, &cfg80211_rdev_list, list) 1648ad932f04SArik Nemtsov if (!(rdev->wiphy.regulatory_flags & 1649ad932f04SArik Nemtsov REGULATORY_IGNORE_STALE_KICKOFF)) 1650ad932f04SArik Nemtsov reg_leave_invalid_chans(&rdev->wiphy); 1651ad932f04SArik Nemtsov 1652ad932f04SArik Nemtsov rtnl_unlock(); 1653ad932f04SArik Nemtsov } 1654ad932f04SArik Nemtsov 1655ad932f04SArik Nemtsov static void reg_check_channels(void) 1656ad932f04SArik Nemtsov { 1657ad932f04SArik Nemtsov /* 1658ad932f04SArik Nemtsov * Give usermode a chance to do something nicer (move to another 1659ad932f04SArik Nemtsov * channel, orderly disconnection), before forcing a disconnection. 1660ad932f04SArik Nemtsov */ 1661ad932f04SArik Nemtsov mod_delayed_work(system_power_efficient_wq, 1662ad932f04SArik Nemtsov ®_check_chans, 1663ad932f04SArik Nemtsov msecs_to_jiffies(REG_ENFORCE_GRACE_MS)); 1664ad932f04SArik Nemtsov } 1665ad932f04SArik Nemtsov 1666eac03e38SSven Neumann static void wiphy_update_regulatory(struct wiphy *wiphy, 16677db90f4aSLuis R. Rodriguez enum nl80211_reg_initiator initiator) 16688318d78aSJohannes Berg { 16698318d78aSJohannes Berg enum ieee80211_band band; 1670c492db37SJohannes Berg struct regulatory_request *lr = get_last_request(); 1671eac03e38SSven Neumann 16720e3802dbSLuis R. Rodriguez if (ignore_reg_update(wiphy, initiator)) { 16730e3802dbSLuis R. Rodriguez /* 16740e3802dbSLuis R. Rodriguez * Regulatory updates set by CORE are ignored for custom 16750e3802dbSLuis R. Rodriguez * regulatory cards. Let us notify the changes to the driver, 16760e3802dbSLuis R. Rodriguez * as some drivers used this to restore its orig_* reg domain. 16770e3802dbSLuis R. Rodriguez */ 16780e3802dbSLuis R. Rodriguez if (initiator == NL80211_REGDOM_SET_BY_CORE && 1679a2f73b6cSLuis R. Rodriguez wiphy->regulatory_flags & REGULATORY_CUSTOM_REG) 16800e3802dbSLuis R. Rodriguez reg_call_notifier(wiphy, lr); 1681a203c2aaSSven Neumann return; 16820e3802dbSLuis R. Rodriguez } 1683a203c2aaSSven Neumann 1684c492db37SJohannes Berg lr->dfs_region = get_cfg80211_regdom()->dfs_region; 1685b68e6b3bSLuis R. Rodriguez 1686fdc9d7b2SJohannes Berg for (band = 0; band < IEEE80211_NUM_BANDS; band++) 1687fdc9d7b2SJohannes Berg handle_band(wiphy, initiator, wiphy->bands[band]); 1688a203c2aaSSven Neumann 1689e38f8a7aSLuis R. Rodriguez reg_process_beacons(wiphy); 1690038659e7SLuis R. Rodriguez reg_process_ht_flags(wiphy); 16910e3802dbSLuis R. Rodriguez reg_call_notifier(wiphy, lr); 1692b2e1b302SLuis R. Rodriguez } 1693b2e1b302SLuis R. Rodriguez 1694d7549cbbSSven Neumann static void update_all_wiphy_regulatory(enum nl80211_reg_initiator initiator) 1695d7549cbbSSven Neumann { 1696d7549cbbSSven Neumann struct cfg80211_registered_device *rdev; 16974a38994fSRajkumar Manoharan struct wiphy *wiphy; 1698d7549cbbSSven Neumann 16995fe231e8SJohannes Berg ASSERT_RTNL(); 1700458f4f9eSJohannes Berg 17014a38994fSRajkumar Manoharan list_for_each_entry(rdev, &cfg80211_rdev_list, list) { 17024a38994fSRajkumar Manoharan wiphy = &rdev->wiphy; 17034a38994fSRajkumar Manoharan wiphy_update_regulatory(wiphy, initiator); 17044a38994fSRajkumar Manoharan } 1705ad932f04SArik Nemtsov 1706ad932f04SArik Nemtsov reg_check_channels(); 1707d7549cbbSSven Neumann } 1708d7549cbbSSven Neumann 17091fa25e41SLuis R. Rodriguez static void handle_channel_custom(struct wiphy *wiphy, 1710fdc9d7b2SJohannes Berg struct ieee80211_channel *chan, 17111fa25e41SLuis R. Rodriguez const struct ieee80211_regdomain *regd) 17121fa25e41SLuis R. Rodriguez { 1713038659e7SLuis R. Rodriguez u32 bw_flags = 0; 17141fa25e41SLuis R. Rodriguez const struct ieee80211_reg_rule *reg_rule = NULL; 17151fa25e41SLuis R. Rodriguez const struct ieee80211_power_rule *power_rule = NULL; 1716038659e7SLuis R. Rodriguez const struct ieee80211_freq_range *freq_range = NULL; 171797524820SJanusz Dziedzic u32 max_bandwidth_khz; 17184edd5698SMatthias May u32 bw; 17191fa25e41SLuis R. Rodriguez 17204edd5698SMatthias May for (bw = MHZ_TO_KHZ(20); bw >= MHZ_TO_KHZ(5); bw = bw / 2) { 17214edd5698SMatthias May reg_rule = freq_reg_info_regd(wiphy, 17224edd5698SMatthias May MHZ_TO_KHZ(chan->center_freq), 17234edd5698SMatthias May regd, bw); 17244edd5698SMatthias May if (!IS_ERR(reg_rule)) 17254edd5698SMatthias May break; 17264edd5698SMatthias May } 17271fa25e41SLuis R. Rodriguez 1728361c9c8bSJohannes Berg if (IS_ERR(reg_rule)) { 1729fe7ef5e9SJohannes Berg REG_DBG_PRINT("Disabling freq %d MHz as custom regd has no rule that fits it\n", 1730fe7ef5e9SJohannes Berg chan->center_freq); 1731db8dfee5SArik Nemtsov if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) { 1732db8dfee5SArik Nemtsov chan->flags |= IEEE80211_CHAN_DISABLED; 1733db8dfee5SArik Nemtsov } else { 1734cc493e4fSLuis R. Rodriguez chan->orig_flags |= IEEE80211_CHAN_DISABLED; 1735cc493e4fSLuis R. Rodriguez chan->flags = chan->orig_flags; 1736db8dfee5SArik Nemtsov } 17371fa25e41SLuis R. Rodriguez return; 17381fa25e41SLuis R. Rodriguez } 17391fa25e41SLuis R. Rodriguez 1740b0dfd2eaSJanusz Dziedzic chan_reg_rule_print_dbg(regd, chan, reg_rule); 1741e702d3cfSLuis R. Rodriguez 17421fa25e41SLuis R. Rodriguez power_rule = ®_rule->power_rule; 1743038659e7SLuis R. Rodriguez freq_range = ®_rule->freq_range; 17441fa25e41SLuis R. Rodriguez 174597524820SJanusz Dziedzic max_bandwidth_khz = freq_range->max_bandwidth_khz; 174697524820SJanusz Dziedzic /* Check if auto calculation requested */ 1747b0dfd2eaSJanusz Dziedzic if (reg_rule->flags & NL80211_RRF_AUTO_BW) 174897524820SJanusz Dziedzic max_bandwidth_khz = reg_get_max_bandwidth(regd, reg_rule); 174997524820SJanusz Dziedzic 17504edd5698SMatthias May /* If we get a reg_rule we can assume that at least 5Mhz fit */ 17514edd5698SMatthias May if (!reg_does_bw_fit(freq_range, MHZ_TO_KHZ(chan->center_freq), 17524edd5698SMatthias May MHZ_TO_KHZ(10))) 17534edd5698SMatthias May bw_flags |= IEEE80211_CHAN_NO_10MHZ; 17544edd5698SMatthias May if (!reg_does_bw_fit(freq_range, MHZ_TO_KHZ(chan->center_freq), 17554edd5698SMatthias May MHZ_TO_KHZ(20))) 17564edd5698SMatthias May bw_flags |= IEEE80211_CHAN_NO_20MHZ; 17574edd5698SMatthias May 17584edd5698SMatthias May if (max_bandwidth_khz < MHZ_TO_KHZ(10)) 17594edd5698SMatthias May bw_flags |= IEEE80211_CHAN_NO_10MHZ; 17604edd5698SMatthias May if (max_bandwidth_khz < MHZ_TO_KHZ(20)) 17614edd5698SMatthias May bw_flags |= IEEE80211_CHAN_NO_20MHZ; 176297524820SJanusz Dziedzic if (max_bandwidth_khz < MHZ_TO_KHZ(40)) 17634edd5698SMatthias May bw_flags |= IEEE80211_CHAN_NO_HT40; 176497524820SJanusz Dziedzic if (max_bandwidth_khz < MHZ_TO_KHZ(80)) 1765c7a6ee27SJohannes Berg bw_flags |= IEEE80211_CHAN_NO_80MHZ; 176697524820SJanusz Dziedzic if (max_bandwidth_khz < MHZ_TO_KHZ(160)) 1767c7a6ee27SJohannes Berg bw_flags |= IEEE80211_CHAN_NO_160MHZ; 1768038659e7SLuis R. Rodriguez 17692e18b38fSArik Nemtsov chan->dfs_state_entered = jiffies; 1770c7ab5081SArik Nemtsov chan->dfs_state = NL80211_DFS_USABLE; 1771c7ab5081SArik Nemtsov 1772c7ab5081SArik Nemtsov chan->beacon_found = false; 1773db8dfee5SArik Nemtsov 1774db8dfee5SArik Nemtsov if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) 1775db8dfee5SArik Nemtsov chan->flags = chan->orig_flags | bw_flags | 1776db8dfee5SArik Nemtsov map_regdom_flags(reg_rule->flags); 1777db8dfee5SArik Nemtsov else 1778038659e7SLuis R. Rodriguez chan->flags |= map_regdom_flags(reg_rule->flags) | bw_flags; 1779db8dfee5SArik Nemtsov 17801fa25e41SLuis R. Rodriguez chan->max_antenna_gain = (int) MBI_TO_DBI(power_rule->max_antenna_gain); 1781279f0f55SFelix Fietkau chan->max_reg_power = chan->max_power = 1782279f0f55SFelix Fietkau (int) MBM_TO_DBM(power_rule->max_eirp); 17832e18b38fSArik Nemtsov 17842e18b38fSArik Nemtsov if (chan->flags & IEEE80211_CHAN_RADAR) { 17852e18b38fSArik Nemtsov if (reg_rule->dfs_cac_ms) 17862e18b38fSArik Nemtsov chan->dfs_cac_ms = reg_rule->dfs_cac_ms; 17872e18b38fSArik Nemtsov else 17882e18b38fSArik Nemtsov chan->dfs_cac_ms = IEEE80211_DFS_MIN_CAC_TIME_MS; 17892e18b38fSArik Nemtsov } 17902e18b38fSArik Nemtsov 17912e18b38fSArik Nemtsov chan->max_power = chan->max_reg_power; 17921fa25e41SLuis R. Rodriguez } 17931fa25e41SLuis R. Rodriguez 1794fdc9d7b2SJohannes Berg static void handle_band_custom(struct wiphy *wiphy, 1795fdc9d7b2SJohannes Berg struct ieee80211_supported_band *sband, 17961fa25e41SLuis R. Rodriguez const struct ieee80211_regdomain *regd) 17971fa25e41SLuis R. Rodriguez { 17981fa25e41SLuis R. Rodriguez unsigned int i; 17991fa25e41SLuis R. Rodriguez 1800fdc9d7b2SJohannes Berg if (!sband) 1801fdc9d7b2SJohannes Berg return; 18021fa25e41SLuis R. Rodriguez 18031fa25e41SLuis R. Rodriguez for (i = 0; i < sband->n_channels; i++) 1804fdc9d7b2SJohannes Berg handle_channel_custom(wiphy, &sband->channels[i], regd); 18051fa25e41SLuis R. Rodriguez } 18061fa25e41SLuis R. Rodriguez 18071fa25e41SLuis R. Rodriguez /* Used by drivers prior to wiphy registration */ 18081fa25e41SLuis R. Rodriguez void wiphy_apply_custom_regulatory(struct wiphy *wiphy, 18091fa25e41SLuis R. Rodriguez const struct ieee80211_regdomain *regd) 18101fa25e41SLuis R. Rodriguez { 18111fa25e41SLuis R. Rodriguez enum ieee80211_band band; 1812bbcf3f02SLuis R. Rodriguez unsigned int bands_set = 0; 1813ac46d48eSLuis R. Rodriguez 1814a2f73b6cSLuis R. Rodriguez WARN(!(wiphy->regulatory_flags & REGULATORY_CUSTOM_REG), 1815a2f73b6cSLuis R. Rodriguez "wiphy should have REGULATORY_CUSTOM_REG\n"); 1816a2f73b6cSLuis R. Rodriguez wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG; 1817222ea581SLuis R. Rodriguez 18181fa25e41SLuis R. Rodriguez for (band = 0; band < IEEE80211_NUM_BANDS; band++) { 1819bbcf3f02SLuis R. Rodriguez if (!wiphy->bands[band]) 1820bbcf3f02SLuis R. Rodriguez continue; 1821fdc9d7b2SJohannes Berg handle_band_custom(wiphy, wiphy->bands[band], regd); 1822bbcf3f02SLuis R. Rodriguez bands_set++; 18231fa25e41SLuis R. Rodriguez } 1824bbcf3f02SLuis R. Rodriguez 1825bbcf3f02SLuis R. Rodriguez /* 1826bbcf3f02SLuis R. Rodriguez * no point in calling this if it won't have any effect 18271a919318SJohannes Berg * on your device's supported bands. 1828bbcf3f02SLuis R. Rodriguez */ 1829bbcf3f02SLuis R. Rodriguez WARN_ON(!bands_set); 18301fa25e41SLuis R. Rodriguez } 18311fa25e41SLuis R. Rodriguez EXPORT_SYMBOL(wiphy_apply_custom_regulatory); 18321fa25e41SLuis R. Rodriguez 1833b2e253cfSLuis R. Rodriguez static void reg_set_request_processed(void) 1834b2e253cfSLuis R. Rodriguez { 1835b2e253cfSLuis R. Rodriguez bool need_more_processing = false; 1836c492db37SJohannes Berg struct regulatory_request *lr = get_last_request(); 1837b2e253cfSLuis R. Rodriguez 1838c492db37SJohannes Berg lr->processed = true; 1839b2e253cfSLuis R. Rodriguez 1840b2e253cfSLuis R. Rodriguez spin_lock(®_requests_lock); 1841b2e253cfSLuis R. Rodriguez if (!list_empty(®_requests_list)) 1842b2e253cfSLuis R. Rodriguez need_more_processing = true; 1843b2e253cfSLuis R. Rodriguez spin_unlock(®_requests_lock); 1844b2e253cfSLuis R. Rodriguez 1845fe20b39eSEliad Peller cancel_delayed_work(®_timeout); 1846a90c7a31SLuis R. Rodriguez 1847b2e253cfSLuis R. Rodriguez if (need_more_processing) 1848b2e253cfSLuis R. Rodriguez schedule_work(®_work); 1849b2e253cfSLuis R. Rodriguez } 1850b2e253cfSLuis R. Rodriguez 1851d1c96a9aSLuis R. Rodriguez /** 1852b3eb7f3fSLuis R. Rodriguez * reg_process_hint_core - process core regulatory requests 1853b3eb7f3fSLuis R. Rodriguez * @pending_request: a pending core regulatory request 1854b3eb7f3fSLuis R. Rodriguez * 1855b3eb7f3fSLuis R. Rodriguez * The wireless subsystem can use this function to process 1856b3eb7f3fSLuis R. Rodriguez * a regulatory request issued by the regulatory core. 1857b3eb7f3fSLuis R. Rodriguez */ 185825b20dbdSJohannes Berg static void reg_process_hint_core(struct regulatory_request *core_request) 1859b3eb7f3fSLuis R. Rodriguez { 186025b20dbdSJohannes Berg if (reg_call_crda(core_request)) { 1861b3eb7f3fSLuis R. Rodriguez core_request->intersect = false; 1862b3eb7f3fSLuis R. Rodriguez core_request->processed = false; 186305f1a3eaSLuis R. Rodriguez reg_update_last_request(core_request); 186425b20dbdSJohannes Berg } 1865b3eb7f3fSLuis R. Rodriguez } 1866b3eb7f3fSLuis R. Rodriguez 18670d97a619SLuis R. Rodriguez static enum reg_request_treatment 18680d97a619SLuis R. Rodriguez __reg_process_hint_user(struct regulatory_request *user_request) 18690d97a619SLuis R. Rodriguez { 18700d97a619SLuis R. Rodriguez struct regulatory_request *lr = get_last_request(); 18710d97a619SLuis R. Rodriguez 18720d97a619SLuis R. Rodriguez if (reg_request_cell_base(user_request)) 18730d97a619SLuis R. Rodriguez return reg_ignore_cell_hint(user_request); 18740d97a619SLuis R. Rodriguez 18750d97a619SLuis R. Rodriguez if (reg_request_cell_base(lr)) 18760d97a619SLuis R. Rodriguez return REG_REQ_IGNORE; 18770d97a619SLuis R. Rodriguez 18780d97a619SLuis R. Rodriguez if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) 18790d97a619SLuis R. Rodriguez return REG_REQ_INTERSECT; 18800d97a619SLuis R. Rodriguez /* 18810d97a619SLuis R. Rodriguez * If the user knows better the user should set the regdom 18820d97a619SLuis R. Rodriguez * to their country before the IE is picked up 18830d97a619SLuis R. Rodriguez */ 18840d97a619SLuis R. Rodriguez if (lr->initiator == NL80211_REGDOM_SET_BY_USER && 18850d97a619SLuis R. Rodriguez lr->intersect) 18860d97a619SLuis R. Rodriguez return REG_REQ_IGNORE; 18870d97a619SLuis R. Rodriguez /* 18880d97a619SLuis R. Rodriguez * Process user requests only after previous user/driver/core 18890d97a619SLuis R. Rodriguez * requests have been processed 18900d97a619SLuis R. Rodriguez */ 18910d97a619SLuis R. Rodriguez if ((lr->initiator == NL80211_REGDOM_SET_BY_CORE || 18920d97a619SLuis R. Rodriguez lr->initiator == NL80211_REGDOM_SET_BY_DRIVER || 18930d97a619SLuis R. Rodriguez lr->initiator == NL80211_REGDOM_SET_BY_USER) && 18940d97a619SLuis R. Rodriguez regdom_changes(lr->alpha2)) 18950d97a619SLuis R. Rodriguez return REG_REQ_IGNORE; 18960d97a619SLuis R. Rodriguez 18970d97a619SLuis R. Rodriguez if (!regdom_changes(user_request->alpha2)) 18980d97a619SLuis R. Rodriguez return REG_REQ_ALREADY_SET; 18990d97a619SLuis R. Rodriguez 19000d97a619SLuis R. Rodriguez return REG_REQ_OK; 19010d97a619SLuis R. Rodriguez } 19020d97a619SLuis R. Rodriguez 19030d97a619SLuis R. Rodriguez /** 19040d97a619SLuis R. Rodriguez * reg_process_hint_user - process user regulatory requests 19050d97a619SLuis R. Rodriguez * @user_request: a pending user regulatory request 19060d97a619SLuis R. Rodriguez * 19070d97a619SLuis R. Rodriguez * The wireless subsystem can use this function to process 19080d97a619SLuis R. Rodriguez * a regulatory request initiated by userspace. 19090d97a619SLuis R. Rodriguez */ 191025b20dbdSJohannes Berg static void reg_process_hint_user(struct regulatory_request *user_request) 19110d97a619SLuis R. Rodriguez { 19120d97a619SLuis R. Rodriguez enum reg_request_treatment treatment; 19130d97a619SLuis R. Rodriguez 19140d97a619SLuis R. Rodriguez treatment = __reg_process_hint_user(user_request); 19150d97a619SLuis R. Rodriguez if (treatment == REG_REQ_IGNORE || 19160c4ddcd2SIlan peer treatment == REG_REQ_ALREADY_SET) { 1917c888393bSArik Nemtsov reg_free_request(user_request); 191825b20dbdSJohannes Berg return; 19190d97a619SLuis R. Rodriguez } 19200d97a619SLuis R. Rodriguez 19210d97a619SLuis R. Rodriguez user_request->intersect = treatment == REG_REQ_INTERSECT; 19220d97a619SLuis R. Rodriguez user_request->processed = false; 19235ad6ef5eSLuis R. Rodriguez 192425b20dbdSJohannes Berg if (reg_call_crda(user_request)) { 192505f1a3eaSLuis R. Rodriguez reg_update_last_request(user_request); 19260d97a619SLuis R. Rodriguez user_alpha2[0] = user_request->alpha2[0]; 19270d97a619SLuis R. Rodriguez user_alpha2[1] = user_request->alpha2[1]; 192825b20dbdSJohannes Berg } else { 192925b20dbdSJohannes Berg reg_free_request(user_request); 193025b20dbdSJohannes Berg } 19310d97a619SLuis R. Rodriguez } 19320d97a619SLuis R. Rodriguez 193321636c7fSLuis R. Rodriguez static enum reg_request_treatment 193421636c7fSLuis R. Rodriguez __reg_process_hint_driver(struct regulatory_request *driver_request) 193521636c7fSLuis R. Rodriguez { 193621636c7fSLuis R. Rodriguez struct regulatory_request *lr = get_last_request(); 193721636c7fSLuis R. Rodriguez 193821636c7fSLuis R. Rodriguez if (lr->initiator == NL80211_REGDOM_SET_BY_CORE) { 193921636c7fSLuis R. Rodriguez if (regdom_changes(driver_request->alpha2)) 194021636c7fSLuis R. Rodriguez return REG_REQ_OK; 194121636c7fSLuis R. Rodriguez return REG_REQ_ALREADY_SET; 194221636c7fSLuis R. Rodriguez } 194321636c7fSLuis R. Rodriguez 194421636c7fSLuis R. Rodriguez /* 194521636c7fSLuis R. Rodriguez * This would happen if you unplug and plug your card 194621636c7fSLuis R. Rodriguez * back in or if you add a new device for which the previously 194721636c7fSLuis R. Rodriguez * loaded card also agrees on the regulatory domain. 194821636c7fSLuis R. Rodriguez */ 194921636c7fSLuis R. Rodriguez if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER && 195021636c7fSLuis R. Rodriguez !regdom_changes(driver_request->alpha2)) 195121636c7fSLuis R. Rodriguez return REG_REQ_ALREADY_SET; 195221636c7fSLuis R. Rodriguez 195321636c7fSLuis R. Rodriguez return REG_REQ_INTERSECT; 195421636c7fSLuis R. Rodriguez } 195521636c7fSLuis R. Rodriguez 195621636c7fSLuis R. Rodriguez /** 195721636c7fSLuis R. Rodriguez * reg_process_hint_driver - process driver regulatory requests 195821636c7fSLuis R. Rodriguez * @driver_request: a pending driver regulatory request 195921636c7fSLuis R. Rodriguez * 196021636c7fSLuis R. Rodriguez * The wireless subsystem can use this function to process 196121636c7fSLuis R. Rodriguez * a regulatory request issued by an 802.11 driver. 196221636c7fSLuis R. Rodriguez * 196321636c7fSLuis R. Rodriguez * Returns one of the different reg request treatment values. 196421636c7fSLuis R. Rodriguez */ 196521636c7fSLuis R. Rodriguez static enum reg_request_treatment 196621636c7fSLuis R. Rodriguez reg_process_hint_driver(struct wiphy *wiphy, 196721636c7fSLuis R. Rodriguez struct regulatory_request *driver_request) 196821636c7fSLuis R. Rodriguez { 196934f05f54SArik Nemtsov const struct ieee80211_regdomain *regd, *tmp; 197021636c7fSLuis R. Rodriguez enum reg_request_treatment treatment; 197121636c7fSLuis R. Rodriguez 197221636c7fSLuis R. Rodriguez treatment = __reg_process_hint_driver(driver_request); 197321636c7fSLuis R. Rodriguez 197421636c7fSLuis R. Rodriguez switch (treatment) { 197521636c7fSLuis R. Rodriguez case REG_REQ_OK: 197621636c7fSLuis R. Rodriguez break; 197721636c7fSLuis R. Rodriguez case REG_REQ_IGNORE: 1978c888393bSArik Nemtsov reg_free_request(driver_request); 197921636c7fSLuis R. Rodriguez return treatment; 198021636c7fSLuis R. Rodriguez case REG_REQ_INTERSECT: 198121636c7fSLuis R. Rodriguez /* fall through */ 198221636c7fSLuis R. Rodriguez case REG_REQ_ALREADY_SET: 198321636c7fSLuis R. Rodriguez regd = reg_copy_regd(get_cfg80211_regdom()); 198421636c7fSLuis R. Rodriguez if (IS_ERR(regd)) { 1985c888393bSArik Nemtsov reg_free_request(driver_request); 198621636c7fSLuis R. Rodriguez return REG_REQ_IGNORE; 198721636c7fSLuis R. Rodriguez } 198834f05f54SArik Nemtsov 198934f05f54SArik Nemtsov tmp = get_wiphy_regdom(wiphy); 199021636c7fSLuis R. Rodriguez rcu_assign_pointer(wiphy->regd, regd); 199134f05f54SArik Nemtsov rcu_free_regdom(tmp); 199221636c7fSLuis R. Rodriguez } 199321636c7fSLuis R. Rodriguez 199421636c7fSLuis R. Rodriguez 199521636c7fSLuis R. Rodriguez driver_request->intersect = treatment == REG_REQ_INTERSECT; 199621636c7fSLuis R. Rodriguez driver_request->processed = false; 19975ad6ef5eSLuis R. Rodriguez 199821636c7fSLuis R. Rodriguez /* 199921636c7fSLuis R. Rodriguez * Since CRDA will not be called in this case as we already 200021636c7fSLuis R. Rodriguez * have applied the requested regulatory domain before we just 200121636c7fSLuis R. Rodriguez * inform userspace we have processed the request 200221636c7fSLuis R. Rodriguez */ 200321636c7fSLuis R. Rodriguez if (treatment == REG_REQ_ALREADY_SET) { 200421636c7fSLuis R. Rodriguez nl80211_send_reg_change_event(driver_request); 200525b20dbdSJohannes Berg reg_update_last_request(driver_request); 200621636c7fSLuis R. Rodriguez reg_set_request_processed(); 200721636c7fSLuis R. Rodriguez return treatment; 200821636c7fSLuis R. Rodriguez } 200921636c7fSLuis R. Rodriguez 201025b20dbdSJohannes Berg if (reg_call_crda(driver_request)) 201125b20dbdSJohannes Berg reg_update_last_request(driver_request); 201225b20dbdSJohannes Berg else 201325b20dbdSJohannes Berg reg_free_request(driver_request); 201425b20dbdSJohannes Berg 201525b20dbdSJohannes Berg return REG_REQ_OK; 201621636c7fSLuis R. Rodriguez } 201721636c7fSLuis R. Rodriguez 2018b23e7a9eSLuis R. Rodriguez static enum reg_request_treatment 2019b23e7a9eSLuis R. Rodriguez __reg_process_hint_country_ie(struct wiphy *wiphy, 2020b23e7a9eSLuis R. Rodriguez struct regulatory_request *country_ie_request) 2021b23e7a9eSLuis R. Rodriguez { 2022b23e7a9eSLuis R. Rodriguez struct wiphy *last_wiphy = NULL; 2023b23e7a9eSLuis R. Rodriguez struct regulatory_request *lr = get_last_request(); 2024b23e7a9eSLuis R. Rodriguez 2025b23e7a9eSLuis R. Rodriguez if (reg_request_cell_base(lr)) { 2026b23e7a9eSLuis R. Rodriguez /* Trust a Cell base station over the AP's country IE */ 2027b23e7a9eSLuis R. Rodriguez if (regdom_changes(country_ie_request->alpha2)) 2028b23e7a9eSLuis R. Rodriguez return REG_REQ_IGNORE; 2029b23e7a9eSLuis R. Rodriguez return REG_REQ_ALREADY_SET; 20302a901468SLuis R. Rodriguez } else { 20312a901468SLuis R. Rodriguez if (wiphy->regulatory_flags & REGULATORY_COUNTRY_IE_IGNORE) 20322a901468SLuis R. Rodriguez return REG_REQ_IGNORE; 2033b23e7a9eSLuis R. Rodriguez } 2034b23e7a9eSLuis R. Rodriguez 2035b23e7a9eSLuis R. Rodriguez if (unlikely(!is_an_alpha2(country_ie_request->alpha2))) 2036b23e7a9eSLuis R. Rodriguez return -EINVAL; 20372f1c6c57SLuis R. Rodriguez 20382f1c6c57SLuis R. Rodriguez if (lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE) 20392f1c6c57SLuis R. Rodriguez return REG_REQ_OK; 20402f1c6c57SLuis R. Rodriguez 20412f1c6c57SLuis R. Rodriguez last_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx); 20422f1c6c57SLuis R. Rodriguez 2043b23e7a9eSLuis R. Rodriguez if (last_wiphy != wiphy) { 2044b23e7a9eSLuis R. Rodriguez /* 2045b23e7a9eSLuis R. Rodriguez * Two cards with two APs claiming different 2046b23e7a9eSLuis R. Rodriguez * Country IE alpha2s. We could 2047b23e7a9eSLuis R. Rodriguez * intersect them, but that seems unlikely 2048b23e7a9eSLuis R. Rodriguez * to be correct. Reject second one for now. 2049b23e7a9eSLuis R. Rodriguez */ 2050b23e7a9eSLuis R. Rodriguez if (regdom_changes(country_ie_request->alpha2)) 2051b23e7a9eSLuis R. Rodriguez return REG_REQ_IGNORE; 2052b23e7a9eSLuis R. Rodriguez return REG_REQ_ALREADY_SET; 2053b23e7a9eSLuis R. Rodriguez } 205470dcec5aSEmmanuel Grumbach 205570dcec5aSEmmanuel Grumbach if (regdom_changes(country_ie_request->alpha2)) 2056b23e7a9eSLuis R. Rodriguez return REG_REQ_OK; 2057b23e7a9eSLuis R. Rodriguez return REG_REQ_ALREADY_SET; 2058b23e7a9eSLuis R. Rodriguez } 2059b23e7a9eSLuis R. Rodriguez 2060b3eb7f3fSLuis R. Rodriguez /** 2061b23e7a9eSLuis R. Rodriguez * reg_process_hint_country_ie - process regulatory requests from country IEs 2062b23e7a9eSLuis R. Rodriguez * @country_ie_request: a regulatory request from a country IE 2063d1c96a9aSLuis R. Rodriguez * 2064b23e7a9eSLuis R. Rodriguez * The wireless subsystem can use this function to process 2065b23e7a9eSLuis R. Rodriguez * a regulatory request issued by a country Information Element. 2066d1c96a9aSLuis R. Rodriguez * 20672f92212bSJohannes Berg * Returns one of the different reg request treatment values. 2068d1c96a9aSLuis R. Rodriguez */ 20692f92212bSJohannes Berg static enum reg_request_treatment 2070b23e7a9eSLuis R. Rodriguez reg_process_hint_country_ie(struct wiphy *wiphy, 2071b23e7a9eSLuis R. Rodriguez struct regulatory_request *country_ie_request) 2072b2e1b302SLuis R. Rodriguez { 20732f92212bSJohannes Berg enum reg_request_treatment treatment; 2074b2e1b302SLuis R. Rodriguez 2075b23e7a9eSLuis R. Rodriguez treatment = __reg_process_hint_country_ie(wiphy, country_ie_request); 2076761cf7ecSLuis R. Rodriguez 20772f92212bSJohannes Berg switch (treatment) { 20782f92212bSJohannes Berg case REG_REQ_OK: 20792f92212bSJohannes Berg break; 2080b23e7a9eSLuis R. Rodriguez case REG_REQ_IGNORE: 2081b23e7a9eSLuis R. Rodriguez /* fall through */ 2082b23e7a9eSLuis R. Rodriguez case REG_REQ_ALREADY_SET: 2083c888393bSArik Nemtsov reg_free_request(country_ie_request); 2084b23e7a9eSLuis R. Rodriguez return treatment; 2085b23e7a9eSLuis R. Rodriguez case REG_REQ_INTERSECT: 2086c888393bSArik Nemtsov reg_free_request(country_ie_request); 2087fb1fc7adSLuis R. Rodriguez /* 2088b23e7a9eSLuis R. Rodriguez * This doesn't happen yet, not sure we 2089b23e7a9eSLuis R. Rodriguez * ever want to support it for this case. 2090fb1fc7adSLuis R. Rodriguez */ 2091b23e7a9eSLuis R. Rodriguez WARN_ONCE(1, "Unexpected intersection for country IEs"); 20922f92212bSJohannes Berg return REG_REQ_IGNORE; 2093d951c1ddSLuis R. Rodriguez } 2094b2e1b302SLuis R. Rodriguez 2095b23e7a9eSLuis R. Rodriguez country_ie_request->intersect = false; 2096b23e7a9eSLuis R. Rodriguez country_ie_request->processed = false; 20975ad6ef5eSLuis R. Rodriguez 209825b20dbdSJohannes Berg if (reg_call_crda(country_ie_request)) 209905f1a3eaSLuis R. Rodriguez reg_update_last_request(country_ie_request); 210025b20dbdSJohannes Berg else 210125b20dbdSJohannes Berg reg_free_request(country_ie_request); 2102d951c1ddSLuis R. Rodriguez 210325b20dbdSJohannes Berg return REG_REQ_OK; 2104b2e1b302SLuis R. Rodriguez } 2105b2e1b302SLuis R. Rodriguez 210630a548c7SLuis R. Rodriguez /* This processes *all* regulatory hints */ 21071daa37c7SLuis R. Rodriguez static void reg_process_hint(struct regulatory_request *reg_request) 2108fe33eb39SLuis R. Rodriguez { 2109fe33eb39SLuis R. Rodriguez struct wiphy *wiphy = NULL; 2110b3eb7f3fSLuis R. Rodriguez enum reg_request_treatment treatment; 2111fe33eb39SLuis R. Rodriguez 2112f4173766SJohannes Berg if (reg_request->wiphy_idx != WIPHY_IDX_INVALID) 2113fe33eb39SLuis R. Rodriguez wiphy = wiphy_idx_to_wiphy(reg_request->wiphy_idx); 2114fe33eb39SLuis R. Rodriguez 2115b3eb7f3fSLuis R. Rodriguez switch (reg_request->initiator) { 2116b3eb7f3fSLuis R. Rodriguez case NL80211_REGDOM_SET_BY_CORE: 2117b3eb7f3fSLuis R. Rodriguez reg_process_hint_core(reg_request); 2118b3eb7f3fSLuis R. Rodriguez return; 2119b3eb7f3fSLuis R. Rodriguez case NL80211_REGDOM_SET_BY_USER: 2120841b351cSJohn Linville reg_process_hint_user(reg_request); 21210d97a619SLuis R. Rodriguez return; 2122b3eb7f3fSLuis R. Rodriguez case NL80211_REGDOM_SET_BY_DRIVER: 2123772f0389SIlan Peer if (!wiphy) 2124772f0389SIlan Peer goto out_free; 212521636c7fSLuis R. Rodriguez treatment = reg_process_hint_driver(wiphy, reg_request); 212621636c7fSLuis R. Rodriguez break; 2127b3eb7f3fSLuis R. Rodriguez case NL80211_REGDOM_SET_BY_COUNTRY_IE: 2128772f0389SIlan Peer if (!wiphy) 2129772f0389SIlan Peer goto out_free; 2130b23e7a9eSLuis R. Rodriguez treatment = reg_process_hint_country_ie(wiphy, reg_request); 2131b3eb7f3fSLuis R. Rodriguez break; 2132b3eb7f3fSLuis R. Rodriguez default: 2133b3eb7f3fSLuis R. Rodriguez WARN(1, "invalid initiator %d\n", reg_request->initiator); 2134772f0389SIlan Peer goto out_free; 2135b3eb7f3fSLuis R. Rodriguez } 2136b3eb7f3fSLuis R. Rodriguez 2137841b351cSJohn Linville /* This is required so that the orig_* parameters are saved. 2138841b351cSJohn Linville * NOTE: treatment must be set for any case that reaches here! 2139841b351cSJohn Linville */ 2140b23e7a9eSLuis R. Rodriguez if (treatment == REG_REQ_ALREADY_SET && wiphy && 2141ad932f04SArik Nemtsov wiphy->regulatory_flags & REGULATORY_STRICT_REG) { 21421daa37c7SLuis R. Rodriguez wiphy_update_regulatory(wiphy, reg_request->initiator); 2143ad932f04SArik Nemtsov reg_check_channels(); 2144ad932f04SArik Nemtsov } 2145772f0389SIlan Peer 2146772f0389SIlan Peer return; 2147772f0389SIlan Peer 2148772f0389SIlan Peer out_free: 2149c888393bSArik Nemtsov reg_free_request(reg_request); 2150fe33eb39SLuis R. Rodriguez } 2151fe33eb39SLuis R. Rodriguez 2152ef51fb1dSArik Nemtsov static bool reg_only_self_managed_wiphys(void) 2153ef51fb1dSArik Nemtsov { 2154ef51fb1dSArik Nemtsov struct cfg80211_registered_device *rdev; 2155ef51fb1dSArik Nemtsov struct wiphy *wiphy; 2156ef51fb1dSArik Nemtsov bool self_managed_found = false; 2157ef51fb1dSArik Nemtsov 2158ef51fb1dSArik Nemtsov ASSERT_RTNL(); 2159ef51fb1dSArik Nemtsov 2160ef51fb1dSArik Nemtsov list_for_each_entry(rdev, &cfg80211_rdev_list, list) { 2161ef51fb1dSArik Nemtsov wiphy = &rdev->wiphy; 2162ef51fb1dSArik Nemtsov if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) 2163ef51fb1dSArik Nemtsov self_managed_found = true; 2164ef51fb1dSArik Nemtsov else 2165ef51fb1dSArik Nemtsov return false; 2166ef51fb1dSArik Nemtsov } 2167ef51fb1dSArik Nemtsov 2168ef51fb1dSArik Nemtsov /* make sure at least one self-managed wiphy exists */ 2169ef51fb1dSArik Nemtsov return self_managed_found; 2170ef51fb1dSArik Nemtsov } 2171ef51fb1dSArik Nemtsov 2172b2e253cfSLuis R. Rodriguez /* 2173b2e253cfSLuis R. Rodriguez * Processes regulatory hints, this is all the NL80211_REGDOM_SET_BY_* 2174b2e253cfSLuis R. Rodriguez * Regulatory hints come on a first come first serve basis and we 2175b2e253cfSLuis R. Rodriguez * must process each one atomically. 2176b2e253cfSLuis R. Rodriguez */ 2177fe33eb39SLuis R. Rodriguez static void reg_process_pending_hints(void) 2178fe33eb39SLuis R. Rodriguez { 2179c492db37SJohannes Berg struct regulatory_request *reg_request, *lr; 2180fe33eb39SLuis R. Rodriguez 2181c492db37SJohannes Berg lr = get_last_request(); 2182b0e2880bSLuis R. Rodriguez 2183b2e253cfSLuis R. Rodriguez /* When last_request->processed becomes true this will be rescheduled */ 2184c492db37SJohannes Berg if (lr && !lr->processed) { 218596cce12fSLuis R. Rodriguez reg_process_hint(lr); 21865fe231e8SJohannes Berg return; 2187b2e253cfSLuis R. Rodriguez } 2188b2e253cfSLuis R. Rodriguez 2189fe33eb39SLuis R. Rodriguez spin_lock(®_requests_lock); 2190b2e253cfSLuis R. Rodriguez 2191b2e253cfSLuis R. Rodriguez if (list_empty(®_requests_list)) { 2192b2e253cfSLuis R. Rodriguez spin_unlock(®_requests_lock); 21935fe231e8SJohannes Berg return; 2194b2e253cfSLuis R. Rodriguez } 2195b2e253cfSLuis R. Rodriguez 2196fe33eb39SLuis R. Rodriguez reg_request = list_first_entry(®_requests_list, 2197fe33eb39SLuis R. Rodriguez struct regulatory_request, 2198fe33eb39SLuis R. Rodriguez list); 2199fe33eb39SLuis R. Rodriguez list_del_init(®_request->list); 2200fe33eb39SLuis R. Rodriguez 2201d951c1ddSLuis R. Rodriguez spin_unlock(®_requests_lock); 2202b0e2880bSLuis R. Rodriguez 2203ef51fb1dSArik Nemtsov if (reg_only_self_managed_wiphys()) { 2204ef51fb1dSArik Nemtsov reg_free_request(reg_request); 2205ef51fb1dSArik Nemtsov return; 2206ef51fb1dSArik Nemtsov } 2207ef51fb1dSArik Nemtsov 22081daa37c7SLuis R. Rodriguez reg_process_hint(reg_request); 22092e54a689SBen 22102e54a689SBen lr = get_last_request(); 22112e54a689SBen 22122e54a689SBen spin_lock(®_requests_lock); 22132e54a689SBen if (!list_empty(®_requests_list) && lr && lr->processed) 22142e54a689SBen schedule_work(®_work); 22152e54a689SBen spin_unlock(®_requests_lock); 2216fe33eb39SLuis R. Rodriguez } 2217fe33eb39SLuis R. Rodriguez 2218e38f8a7aSLuis R. Rodriguez /* Processes beacon hints -- this has nothing to do with country IEs */ 2219e38f8a7aSLuis R. Rodriguez static void reg_process_pending_beacon_hints(void) 2220e38f8a7aSLuis R. Rodriguez { 222179c97e97SJohannes Berg struct cfg80211_registered_device *rdev; 2222e38f8a7aSLuis R. Rodriguez struct reg_beacon *pending_beacon, *tmp; 2223e38f8a7aSLuis R. Rodriguez 2224e38f8a7aSLuis R. Rodriguez /* This goes through the _pending_ beacon list */ 2225e38f8a7aSLuis R. Rodriguez spin_lock_bh(®_pending_beacons_lock); 2226e38f8a7aSLuis R. Rodriguez 2227e38f8a7aSLuis R. Rodriguez list_for_each_entry_safe(pending_beacon, tmp, 2228e38f8a7aSLuis R. Rodriguez ®_pending_beacons, list) { 2229e38f8a7aSLuis R. Rodriguez list_del_init(&pending_beacon->list); 2230e38f8a7aSLuis R. Rodriguez 2231e38f8a7aSLuis R. Rodriguez /* Applies the beacon hint to current wiphys */ 223279c97e97SJohannes Berg list_for_each_entry(rdev, &cfg80211_rdev_list, list) 223379c97e97SJohannes Berg wiphy_update_new_beacon(&rdev->wiphy, pending_beacon); 2234e38f8a7aSLuis R. Rodriguez 2235e38f8a7aSLuis R. Rodriguez /* Remembers the beacon hint for new wiphys or reg changes */ 2236e38f8a7aSLuis R. Rodriguez list_add_tail(&pending_beacon->list, ®_beacon_list); 2237e38f8a7aSLuis R. Rodriguez } 2238e38f8a7aSLuis R. Rodriguez 2239e38f8a7aSLuis R. Rodriguez spin_unlock_bh(®_pending_beacons_lock); 2240e38f8a7aSLuis R. Rodriguez } 2241e38f8a7aSLuis R. Rodriguez 2242b0d7aa59SJonathan Doron static void reg_process_self_managed_hints(void) 2243b0d7aa59SJonathan Doron { 2244b0d7aa59SJonathan Doron struct cfg80211_registered_device *rdev; 2245b0d7aa59SJonathan Doron struct wiphy *wiphy; 2246b0d7aa59SJonathan Doron const struct ieee80211_regdomain *tmp; 2247b0d7aa59SJonathan Doron const struct ieee80211_regdomain *regd; 2248b0d7aa59SJonathan Doron enum ieee80211_band band; 2249b0d7aa59SJonathan Doron struct regulatory_request request = {}; 2250b0d7aa59SJonathan Doron 2251b0d7aa59SJonathan Doron list_for_each_entry(rdev, &cfg80211_rdev_list, list) { 2252b0d7aa59SJonathan Doron wiphy = &rdev->wiphy; 2253b0d7aa59SJonathan Doron 2254b0d7aa59SJonathan Doron spin_lock(®_requests_lock); 2255b0d7aa59SJonathan Doron regd = rdev->requested_regd; 2256b0d7aa59SJonathan Doron rdev->requested_regd = NULL; 2257b0d7aa59SJonathan Doron spin_unlock(®_requests_lock); 2258b0d7aa59SJonathan Doron 2259b0d7aa59SJonathan Doron if (regd == NULL) 2260b0d7aa59SJonathan Doron continue; 2261b0d7aa59SJonathan Doron 2262b0d7aa59SJonathan Doron tmp = get_wiphy_regdom(wiphy); 2263b0d7aa59SJonathan Doron rcu_assign_pointer(wiphy->regd, regd); 2264b0d7aa59SJonathan Doron rcu_free_regdom(tmp); 2265b0d7aa59SJonathan Doron 2266b0d7aa59SJonathan Doron for (band = 0; band < IEEE80211_NUM_BANDS; band++) 2267b0d7aa59SJonathan Doron handle_band_custom(wiphy, wiphy->bands[band], regd); 2268b0d7aa59SJonathan Doron 2269b0d7aa59SJonathan Doron reg_process_ht_flags(wiphy); 2270b0d7aa59SJonathan Doron 2271b0d7aa59SJonathan Doron request.wiphy_idx = get_wiphy_idx(wiphy); 2272b0d7aa59SJonathan Doron request.alpha2[0] = regd->alpha2[0]; 2273b0d7aa59SJonathan Doron request.alpha2[1] = regd->alpha2[1]; 2274b0d7aa59SJonathan Doron request.initiator = NL80211_REGDOM_SET_BY_DRIVER; 2275b0d7aa59SJonathan Doron 2276b0d7aa59SJonathan Doron nl80211_send_wiphy_reg_change_event(&request); 2277b0d7aa59SJonathan Doron } 2278b0d7aa59SJonathan Doron 2279b0d7aa59SJonathan Doron reg_check_channels(); 2280b0d7aa59SJonathan Doron } 2281b0d7aa59SJonathan Doron 2282fe33eb39SLuis R. Rodriguez static void reg_todo(struct work_struct *work) 2283fe33eb39SLuis R. Rodriguez { 22845fe231e8SJohannes Berg rtnl_lock(); 2285fe33eb39SLuis R. Rodriguez reg_process_pending_hints(); 2286e38f8a7aSLuis R. Rodriguez reg_process_pending_beacon_hints(); 2287b0d7aa59SJonathan Doron reg_process_self_managed_hints(); 22885fe231e8SJohannes Berg rtnl_unlock(); 2289fe33eb39SLuis R. Rodriguez } 2290fe33eb39SLuis R. Rodriguez 2291fe33eb39SLuis R. Rodriguez static void queue_regulatory_request(struct regulatory_request *request) 2292fe33eb39SLuis R. Rodriguez { 2293c61029c7SJohn W. Linville request->alpha2[0] = toupper(request->alpha2[0]); 2294c61029c7SJohn W. Linville request->alpha2[1] = toupper(request->alpha2[1]); 2295c61029c7SJohn W. Linville 2296fe33eb39SLuis R. Rodriguez spin_lock(®_requests_lock); 2297fe33eb39SLuis R. Rodriguez list_add_tail(&request->list, ®_requests_list); 2298fe33eb39SLuis R. Rodriguez spin_unlock(®_requests_lock); 2299fe33eb39SLuis R. Rodriguez 2300fe33eb39SLuis R. Rodriguez schedule_work(®_work); 2301fe33eb39SLuis R. Rodriguez } 2302fe33eb39SLuis R. Rodriguez 230309d989d1SLuis R. Rodriguez /* 230409d989d1SLuis R. Rodriguez * Core regulatory hint -- happens during cfg80211_init() 230509d989d1SLuis R. Rodriguez * and when we restore regulatory settings. 230609d989d1SLuis R. Rodriguez */ 2307ba25c141SLuis R. Rodriguez static int regulatory_hint_core(const char *alpha2) 2308ba25c141SLuis R. Rodriguez { 2309ba25c141SLuis R. Rodriguez struct regulatory_request *request; 2310ba25c141SLuis R. Rodriguez 23111a919318SJohannes Berg request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); 2312ba25c141SLuis R. Rodriguez if (!request) 2313ba25c141SLuis R. Rodriguez return -ENOMEM; 2314ba25c141SLuis R. Rodriguez 2315ba25c141SLuis R. Rodriguez request->alpha2[0] = alpha2[0]; 2316ba25c141SLuis R. Rodriguez request->alpha2[1] = alpha2[1]; 23177db90f4aSLuis R. Rodriguez request->initiator = NL80211_REGDOM_SET_BY_CORE; 2318ba25c141SLuis R. Rodriguez 231931e99729SLuis R. Rodriguez queue_regulatory_request(request); 23205078b2e3SLuis R. Rodriguez 2321fe33eb39SLuis R. Rodriguez return 0; 2322ba25c141SLuis R. Rodriguez } 2323ba25c141SLuis R. Rodriguez 2324fe33eb39SLuis R. Rodriguez /* User hints */ 232557b5ce07SLuis R. Rodriguez int regulatory_hint_user(const char *alpha2, 232657b5ce07SLuis R. Rodriguez enum nl80211_user_reg_hint_type user_reg_hint_type) 2327b2e1b302SLuis R. Rodriguez { 2328fe33eb39SLuis R. Rodriguez struct regulatory_request *request; 2329fe33eb39SLuis R. Rodriguez 2330fdc9d7b2SJohannes Berg if (WARN_ON(!alpha2)) 2331fdc9d7b2SJohannes Berg return -EINVAL; 2332b2e1b302SLuis R. Rodriguez 2333fe33eb39SLuis R. Rodriguez request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); 2334fe33eb39SLuis R. Rodriguez if (!request) 2335fe33eb39SLuis R. Rodriguez return -ENOMEM; 2336fe33eb39SLuis R. Rodriguez 2337f4173766SJohannes Berg request->wiphy_idx = WIPHY_IDX_INVALID; 2338fe33eb39SLuis R. Rodriguez request->alpha2[0] = alpha2[0]; 2339fe33eb39SLuis R. Rodriguez request->alpha2[1] = alpha2[1]; 2340e12822e1SLuis R. Rodriguez request->initiator = NL80211_REGDOM_SET_BY_USER; 234157b5ce07SLuis R. Rodriguez request->user_reg_hint_type = user_reg_hint_type; 2342fe33eb39SLuis R. Rodriguez 2343c37722bdSIlan peer /* Allow calling CRDA again */ 2344c37722bdSIlan peer reg_crda_timeouts = 0; 2345c37722bdSIlan peer 2346fe33eb39SLuis R. Rodriguez queue_regulatory_request(request); 2347fe33eb39SLuis R. Rodriguez 2348fe33eb39SLuis R. Rodriguez return 0; 2349fe33eb39SLuis R. Rodriguez } 2350fe33eb39SLuis R. Rodriguez 235105050753SIlan peer int regulatory_hint_indoor(bool is_indoor, u32 portid) 235252616f2bSIlan Peer { 235305050753SIlan peer spin_lock(®_indoor_lock); 235452616f2bSIlan Peer 235505050753SIlan peer /* It is possible that more than one user space process is trying to 235605050753SIlan peer * configure the indoor setting. To handle such cases, clear the indoor 235705050753SIlan peer * setting in case that some process does not think that the device 235805050753SIlan peer * is operating in an indoor environment. In addition, if a user space 235905050753SIlan peer * process indicates that it is controlling the indoor setting, save its 236005050753SIlan peer * portid, i.e., make it the owner. 236105050753SIlan peer */ 236205050753SIlan peer reg_is_indoor = is_indoor; 236305050753SIlan peer if (reg_is_indoor) { 236405050753SIlan peer if (!reg_is_indoor_portid) 236505050753SIlan peer reg_is_indoor_portid = portid; 236605050753SIlan peer } else { 236705050753SIlan peer reg_is_indoor_portid = 0; 236805050753SIlan peer } 236952616f2bSIlan Peer 237005050753SIlan peer spin_unlock(®_indoor_lock); 237105050753SIlan peer 237205050753SIlan peer if (!is_indoor) 237305050753SIlan peer reg_check_channels(); 237452616f2bSIlan Peer 237552616f2bSIlan Peer return 0; 237652616f2bSIlan Peer } 237752616f2bSIlan Peer 237805050753SIlan peer void regulatory_netlink_notify(u32 portid) 237905050753SIlan peer { 238005050753SIlan peer spin_lock(®_indoor_lock); 238105050753SIlan peer 238205050753SIlan peer if (reg_is_indoor_portid != portid) { 238305050753SIlan peer spin_unlock(®_indoor_lock); 238405050753SIlan peer return; 238505050753SIlan peer } 238605050753SIlan peer 238705050753SIlan peer reg_is_indoor = false; 238805050753SIlan peer reg_is_indoor_portid = 0; 238905050753SIlan peer 239005050753SIlan peer spin_unlock(®_indoor_lock); 239105050753SIlan peer 239205050753SIlan peer reg_check_channels(); 239305050753SIlan peer } 239405050753SIlan peer 2395fe33eb39SLuis R. Rodriguez /* Driver hints */ 2396fe33eb39SLuis R. Rodriguez int regulatory_hint(struct wiphy *wiphy, const char *alpha2) 2397fe33eb39SLuis R. Rodriguez { 2398fe33eb39SLuis R. Rodriguez struct regulatory_request *request; 2399fe33eb39SLuis R. Rodriguez 2400fdc9d7b2SJohannes Berg if (WARN_ON(!alpha2 || !wiphy)) 2401fdc9d7b2SJohannes Berg return -EINVAL; 2402fe33eb39SLuis R. Rodriguez 24034f7b9140SLuis R. Rodriguez wiphy->regulatory_flags &= ~REGULATORY_CUSTOM_REG; 24044f7b9140SLuis R. Rodriguez 2405fe33eb39SLuis R. Rodriguez request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); 2406fe33eb39SLuis R. Rodriguez if (!request) 2407fe33eb39SLuis R. Rodriguez return -ENOMEM; 2408fe33eb39SLuis R. Rodriguez 2409fe33eb39SLuis R. Rodriguez request->wiphy_idx = get_wiphy_idx(wiphy); 2410fe33eb39SLuis R. Rodriguez 2411fe33eb39SLuis R. Rodriguez request->alpha2[0] = alpha2[0]; 2412fe33eb39SLuis R. Rodriguez request->alpha2[1] = alpha2[1]; 24137db90f4aSLuis R. Rodriguez request->initiator = NL80211_REGDOM_SET_BY_DRIVER; 2414fe33eb39SLuis R. Rodriguez 2415c37722bdSIlan peer /* Allow calling CRDA again */ 2416c37722bdSIlan peer reg_crda_timeouts = 0; 2417c37722bdSIlan peer 2418fe33eb39SLuis R. Rodriguez queue_regulatory_request(request); 2419fe33eb39SLuis R. Rodriguez 2420fe33eb39SLuis R. Rodriguez return 0; 2421b2e1b302SLuis R. Rodriguez } 2422b2e1b302SLuis R. Rodriguez EXPORT_SYMBOL(regulatory_hint); 2423b2e1b302SLuis R. Rodriguez 2424789fd033SLuis R. Rodriguez void regulatory_hint_country_ie(struct wiphy *wiphy, enum ieee80211_band band, 24251a919318SJohannes Berg const u8 *country_ie, u8 country_ie_len) 24263f2355cbSLuis R. Rodriguez { 24273f2355cbSLuis R. Rodriguez char alpha2[2]; 24283f2355cbSLuis R. Rodriguez enum environment_cap env = ENVIRON_ANY; 2429db2424c5SJohannes Berg struct regulatory_request *request = NULL, *lr; 2430d335fe63SLuis R. Rodriguez 24313f2355cbSLuis R. Rodriguez /* IE len must be evenly divisible by 2 */ 24323f2355cbSLuis R. Rodriguez if (country_ie_len & 0x01) 2433db2424c5SJohannes Berg return; 24343f2355cbSLuis R. Rodriguez 24353f2355cbSLuis R. Rodriguez if (country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN) 2436db2424c5SJohannes Berg return; 2437db2424c5SJohannes Berg 2438db2424c5SJohannes Berg request = kzalloc(sizeof(*request), GFP_KERNEL); 2439db2424c5SJohannes Berg if (!request) 2440db2424c5SJohannes Berg return; 24413f2355cbSLuis R. Rodriguez 24423f2355cbSLuis R. Rodriguez alpha2[0] = country_ie[0]; 24433f2355cbSLuis R. Rodriguez alpha2[1] = country_ie[1]; 24443f2355cbSLuis R. Rodriguez 24453f2355cbSLuis R. Rodriguez if (country_ie[2] == 'I') 24463f2355cbSLuis R. Rodriguez env = ENVIRON_INDOOR; 24473f2355cbSLuis R. Rodriguez else if (country_ie[2] == 'O') 24483f2355cbSLuis R. Rodriguez env = ENVIRON_OUTDOOR; 24493f2355cbSLuis R. Rodriguez 2450db2424c5SJohannes Berg rcu_read_lock(); 2451db2424c5SJohannes Berg lr = get_last_request(); 2452db2424c5SJohannes Berg 2453db2424c5SJohannes Berg if (unlikely(!lr)) 2454db2424c5SJohannes Berg goto out; 2455db2424c5SJohannes Berg 2456fb1fc7adSLuis R. Rodriguez /* 24578b19e6caSLuis R. Rodriguez * We will run this only upon a successful connection on cfg80211. 24584b44c8bcSLuis R. Rodriguez * We leave conflict resolution to the workqueue, where can hold 24595fe231e8SJohannes Berg * the RTNL. 2460fb1fc7adSLuis R. Rodriguez */ 2461c492db37SJohannes Berg if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE && 2462c492db37SJohannes Berg lr->wiphy_idx != WIPHY_IDX_INVALID) 24633f2355cbSLuis R. Rodriguez goto out; 24643f2355cbSLuis R. Rodriguez 2465fe33eb39SLuis R. Rodriguez request->wiphy_idx = get_wiphy_idx(wiphy); 24664f366c5dSJohn W. Linville request->alpha2[0] = alpha2[0]; 24674f366c5dSJohn W. Linville request->alpha2[1] = alpha2[1]; 24687db90f4aSLuis R. Rodriguez request->initiator = NL80211_REGDOM_SET_BY_COUNTRY_IE; 2469fe33eb39SLuis R. Rodriguez request->country_ie_env = env; 24703f2355cbSLuis R. Rodriguez 2471c37722bdSIlan peer /* Allow calling CRDA again */ 2472c37722bdSIlan peer reg_crda_timeouts = 0; 2473c37722bdSIlan peer 2474fe33eb39SLuis R. Rodriguez queue_regulatory_request(request); 2475db2424c5SJohannes Berg request = NULL; 24763f2355cbSLuis R. Rodriguez out: 2477db2424c5SJohannes Berg kfree(request); 2478db2424c5SJohannes Berg rcu_read_unlock(); 24793f2355cbSLuis R. Rodriguez } 2480b2e1b302SLuis R. Rodriguez 248109d989d1SLuis R. Rodriguez static void restore_alpha2(char *alpha2, bool reset_user) 248209d989d1SLuis R. Rodriguez { 248309d989d1SLuis R. Rodriguez /* indicates there is no alpha2 to consider for restoration */ 248409d989d1SLuis R. Rodriguez alpha2[0] = '9'; 248509d989d1SLuis R. Rodriguez alpha2[1] = '7'; 248609d989d1SLuis R. Rodriguez 248709d989d1SLuis R. Rodriguez /* The user setting has precedence over the module parameter */ 248809d989d1SLuis R. Rodriguez if (is_user_regdom_saved()) { 248909d989d1SLuis R. Rodriguez /* Unless we're asked to ignore it and reset it */ 249009d989d1SLuis R. Rodriguez if (reset_user) { 24911a919318SJohannes Berg REG_DBG_PRINT("Restoring regulatory settings including user preference\n"); 249209d989d1SLuis R. Rodriguez user_alpha2[0] = '9'; 249309d989d1SLuis R. Rodriguez user_alpha2[1] = '7'; 249409d989d1SLuis R. Rodriguez 249509d989d1SLuis R. Rodriguez /* 249609d989d1SLuis R. Rodriguez * If we're ignoring user settings, we still need to 249709d989d1SLuis R. Rodriguez * check the module parameter to ensure we put things 249809d989d1SLuis R. Rodriguez * back as they were for a full restore. 249909d989d1SLuis R. Rodriguez */ 250009d989d1SLuis R. Rodriguez if (!is_world_regdom(ieee80211_regdom)) { 25011a919318SJohannes Berg REG_DBG_PRINT("Keeping preference on module parameter ieee80211_regdom: %c%c\n", 25021a919318SJohannes Berg ieee80211_regdom[0], ieee80211_regdom[1]); 250309d989d1SLuis R. Rodriguez alpha2[0] = ieee80211_regdom[0]; 250409d989d1SLuis R. Rodriguez alpha2[1] = ieee80211_regdom[1]; 250509d989d1SLuis R. Rodriguez } 250609d989d1SLuis R. Rodriguez } else { 25071a919318SJohannes Berg REG_DBG_PRINT("Restoring regulatory settings while preserving user preference for: %c%c\n", 25081a919318SJohannes Berg user_alpha2[0], user_alpha2[1]); 250909d989d1SLuis R. Rodriguez alpha2[0] = user_alpha2[0]; 251009d989d1SLuis R. Rodriguez alpha2[1] = user_alpha2[1]; 251109d989d1SLuis R. Rodriguez } 251209d989d1SLuis R. Rodriguez } else if (!is_world_regdom(ieee80211_regdom)) { 25131a919318SJohannes Berg REG_DBG_PRINT("Keeping preference on module parameter ieee80211_regdom: %c%c\n", 25141a919318SJohannes Berg ieee80211_regdom[0], ieee80211_regdom[1]); 251509d989d1SLuis R. Rodriguez alpha2[0] = ieee80211_regdom[0]; 251609d989d1SLuis R. Rodriguez alpha2[1] = ieee80211_regdom[1]; 251709d989d1SLuis R. Rodriguez } else 2518d91e41b6SLuis R. Rodriguez REG_DBG_PRINT("Restoring regulatory settings\n"); 251909d989d1SLuis R. Rodriguez } 252009d989d1SLuis R. Rodriguez 25215ce543d1SRajkumar Manoharan static void restore_custom_reg_settings(struct wiphy *wiphy) 25225ce543d1SRajkumar Manoharan { 25235ce543d1SRajkumar Manoharan struct ieee80211_supported_band *sband; 25245ce543d1SRajkumar Manoharan enum ieee80211_band band; 25255ce543d1SRajkumar Manoharan struct ieee80211_channel *chan; 25265ce543d1SRajkumar Manoharan int i; 25275ce543d1SRajkumar Manoharan 25285ce543d1SRajkumar Manoharan for (band = 0; band < IEEE80211_NUM_BANDS; band++) { 25295ce543d1SRajkumar Manoharan sband = wiphy->bands[band]; 25305ce543d1SRajkumar Manoharan if (!sband) 25315ce543d1SRajkumar Manoharan continue; 25325ce543d1SRajkumar Manoharan for (i = 0; i < sband->n_channels; i++) { 25335ce543d1SRajkumar Manoharan chan = &sband->channels[i]; 25345ce543d1SRajkumar Manoharan chan->flags = chan->orig_flags; 25355ce543d1SRajkumar Manoharan chan->max_antenna_gain = chan->orig_mag; 25365ce543d1SRajkumar Manoharan chan->max_power = chan->orig_mpwr; 2537899852afSPaul Stewart chan->beacon_found = false; 25385ce543d1SRajkumar Manoharan } 25395ce543d1SRajkumar Manoharan } 25405ce543d1SRajkumar Manoharan } 25415ce543d1SRajkumar Manoharan 254209d989d1SLuis R. Rodriguez /* 254309d989d1SLuis R. Rodriguez * Restoring regulatory settings involves ingoring any 254409d989d1SLuis R. Rodriguez * possibly stale country IE information and user regulatory 254509d989d1SLuis R. Rodriguez * settings if so desired, this includes any beacon hints 254609d989d1SLuis R. Rodriguez * learned as we could have traveled outside to another country 254709d989d1SLuis R. Rodriguez * after disconnection. To restore regulatory settings we do 254809d989d1SLuis R. Rodriguez * exactly what we did at bootup: 254909d989d1SLuis R. Rodriguez * 255009d989d1SLuis R. Rodriguez * - send a core regulatory hint 255109d989d1SLuis R. Rodriguez * - send a user regulatory hint if applicable 255209d989d1SLuis R. Rodriguez * 255309d989d1SLuis R. Rodriguez * Device drivers that send a regulatory hint for a specific country 255409d989d1SLuis R. Rodriguez * keep their own regulatory domain on wiphy->regd so that does does 255509d989d1SLuis R. Rodriguez * not need to be remembered. 255609d989d1SLuis R. Rodriguez */ 255709d989d1SLuis R. Rodriguez static void restore_regulatory_settings(bool reset_user) 255809d989d1SLuis R. Rodriguez { 255909d989d1SLuis R. Rodriguez char alpha2[2]; 2560cee0bec5SDmitry Shmidt char world_alpha2[2]; 256109d989d1SLuis R. Rodriguez struct reg_beacon *reg_beacon, *btmp; 256214609555SLuis R. Rodriguez LIST_HEAD(tmp_reg_req_list); 25635ce543d1SRajkumar Manoharan struct cfg80211_registered_device *rdev; 256409d989d1SLuis R. Rodriguez 25655fe231e8SJohannes Berg ASSERT_RTNL(); 25665fe231e8SJohannes Berg 256705050753SIlan peer /* 256805050753SIlan peer * Clear the indoor setting in case that it is not controlled by user 256905050753SIlan peer * space, as otherwise there is no guarantee that the device is still 257005050753SIlan peer * operating in an indoor environment. 257105050753SIlan peer */ 257205050753SIlan peer spin_lock(®_indoor_lock); 257305050753SIlan peer if (reg_is_indoor && !reg_is_indoor_portid) { 257452616f2bSIlan Peer reg_is_indoor = false; 257505050753SIlan peer reg_check_channels(); 257605050753SIlan peer } 257705050753SIlan peer spin_unlock(®_indoor_lock); 257852616f2bSIlan Peer 25792d319867SJohannes Berg reset_regdomains(true, &world_regdom); 258009d989d1SLuis R. Rodriguez restore_alpha2(alpha2, reset_user); 258109d989d1SLuis R. Rodriguez 258214609555SLuis R. Rodriguez /* 258314609555SLuis R. Rodriguez * If there's any pending requests we simply 258414609555SLuis R. Rodriguez * stash them to a temporary pending queue and 258514609555SLuis R. Rodriguez * add then after we've restored regulatory 258614609555SLuis R. Rodriguez * settings. 258714609555SLuis R. Rodriguez */ 258814609555SLuis R. Rodriguez spin_lock(®_requests_lock); 2589eeca9fceSIlan peer list_splice_tail_init(®_requests_list, &tmp_reg_req_list); 259014609555SLuis R. Rodriguez spin_unlock(®_requests_lock); 259114609555SLuis R. Rodriguez 259209d989d1SLuis R. Rodriguez /* Clear beacon hints */ 259309d989d1SLuis R. Rodriguez spin_lock_bh(®_pending_beacons_lock); 2594fea9bcedSJohannes Berg list_for_each_entry_safe(reg_beacon, btmp, ®_pending_beacons, list) { 259509d989d1SLuis R. Rodriguez list_del(®_beacon->list); 259609d989d1SLuis R. Rodriguez kfree(reg_beacon); 259709d989d1SLuis R. Rodriguez } 259809d989d1SLuis R. Rodriguez spin_unlock_bh(®_pending_beacons_lock); 259909d989d1SLuis R. Rodriguez 2600fea9bcedSJohannes Berg list_for_each_entry_safe(reg_beacon, btmp, ®_beacon_list, list) { 260109d989d1SLuis R. Rodriguez list_del(®_beacon->list); 260209d989d1SLuis R. Rodriguez kfree(reg_beacon); 260309d989d1SLuis R. Rodriguez } 260409d989d1SLuis R. Rodriguez 260509d989d1SLuis R. Rodriguez /* First restore to the basic regulatory settings */ 2606379b82f4SJohannes Berg world_alpha2[0] = cfg80211_world_regdom->alpha2[0]; 2607379b82f4SJohannes Berg world_alpha2[1] = cfg80211_world_regdom->alpha2[1]; 260809d989d1SLuis R. Rodriguez 26095ce543d1SRajkumar Manoharan list_for_each_entry(rdev, &cfg80211_rdev_list, list) { 2610b0d7aa59SJonathan Doron if (rdev->wiphy.regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) 2611b0d7aa59SJonathan Doron continue; 2612a2f73b6cSLuis R. Rodriguez if (rdev->wiphy.regulatory_flags & REGULATORY_CUSTOM_REG) 26135ce543d1SRajkumar Manoharan restore_custom_reg_settings(&rdev->wiphy); 26145ce543d1SRajkumar Manoharan } 26155ce543d1SRajkumar Manoharan 2616cee0bec5SDmitry Shmidt regulatory_hint_core(world_alpha2); 261709d989d1SLuis R. Rodriguez 261809d989d1SLuis R. Rodriguez /* 261909d989d1SLuis R. Rodriguez * This restores the ieee80211_regdom module parameter 262009d989d1SLuis R. Rodriguez * preference or the last user requested regulatory 262109d989d1SLuis R. Rodriguez * settings, user regulatory settings takes precedence. 262209d989d1SLuis R. Rodriguez */ 262309d989d1SLuis R. Rodriguez if (is_an_alpha2(alpha2)) 2624549cc1c5SMaciej S. Szmigiero regulatory_hint_user(alpha2, NL80211_USER_REG_HINT_USER); 262509d989d1SLuis R. Rodriguez 262614609555SLuis R. Rodriguez spin_lock(®_requests_lock); 262711cff96cSJohannes Berg list_splice_tail_init(&tmp_reg_req_list, ®_requests_list); 262814609555SLuis R. Rodriguez spin_unlock(®_requests_lock); 262914609555SLuis R. Rodriguez 263014609555SLuis R. Rodriguez REG_DBG_PRINT("Kicking the queue\n"); 263114609555SLuis R. Rodriguez 263214609555SLuis R. Rodriguez schedule_work(®_work); 263314609555SLuis R. Rodriguez } 263409d989d1SLuis R. Rodriguez 263509d989d1SLuis R. Rodriguez void regulatory_hint_disconnect(void) 263609d989d1SLuis R. Rodriguez { 26371a919318SJohannes Berg REG_DBG_PRINT("All devices are disconnected, going to restore regulatory settings\n"); 263809d989d1SLuis R. Rodriguez restore_regulatory_settings(false); 263909d989d1SLuis R. Rodriguez } 264009d989d1SLuis R. Rodriguez 2641e38f8a7aSLuis R. Rodriguez static bool freq_is_chan_12_13_14(u16 freq) 2642e38f8a7aSLuis R. Rodriguez { 264359eb21a6SBruno Randolf if (freq == ieee80211_channel_to_frequency(12, IEEE80211_BAND_2GHZ) || 264459eb21a6SBruno Randolf freq == ieee80211_channel_to_frequency(13, IEEE80211_BAND_2GHZ) || 264559eb21a6SBruno Randolf freq == ieee80211_channel_to_frequency(14, IEEE80211_BAND_2GHZ)) 2646e38f8a7aSLuis R. Rodriguez return true; 2647e38f8a7aSLuis R. Rodriguez return false; 2648e38f8a7aSLuis R. Rodriguez } 2649e38f8a7aSLuis R. Rodriguez 26503ebfa6e7SLuis R. Rodriguez static bool pending_reg_beacon(struct ieee80211_channel *beacon_chan) 26513ebfa6e7SLuis R. Rodriguez { 26523ebfa6e7SLuis R. Rodriguez struct reg_beacon *pending_beacon; 26533ebfa6e7SLuis R. Rodriguez 26543ebfa6e7SLuis R. Rodriguez list_for_each_entry(pending_beacon, ®_pending_beacons, list) 26553ebfa6e7SLuis R. Rodriguez if (beacon_chan->center_freq == 26563ebfa6e7SLuis R. Rodriguez pending_beacon->chan.center_freq) 26573ebfa6e7SLuis R. Rodriguez return true; 26583ebfa6e7SLuis R. Rodriguez return false; 26593ebfa6e7SLuis R. Rodriguez } 26603ebfa6e7SLuis R. Rodriguez 2661e38f8a7aSLuis R. Rodriguez int regulatory_hint_found_beacon(struct wiphy *wiphy, 2662e38f8a7aSLuis R. Rodriguez struct ieee80211_channel *beacon_chan, 2663e38f8a7aSLuis R. Rodriguez gfp_t gfp) 2664e38f8a7aSLuis R. Rodriguez { 2665e38f8a7aSLuis R. Rodriguez struct reg_beacon *reg_beacon; 26663ebfa6e7SLuis R. Rodriguez bool processing; 2667e38f8a7aSLuis R. Rodriguez 26681a919318SJohannes Berg if (beacon_chan->beacon_found || 26691a919318SJohannes Berg beacon_chan->flags & IEEE80211_CHAN_RADAR || 2670e38f8a7aSLuis R. Rodriguez (beacon_chan->band == IEEE80211_BAND_2GHZ && 26711a919318SJohannes Berg !freq_is_chan_12_13_14(beacon_chan->center_freq))) 2672e38f8a7aSLuis R. Rodriguez return 0; 2673e38f8a7aSLuis R. Rodriguez 26743ebfa6e7SLuis R. Rodriguez spin_lock_bh(®_pending_beacons_lock); 26753ebfa6e7SLuis R. Rodriguez processing = pending_reg_beacon(beacon_chan); 26763ebfa6e7SLuis R. Rodriguez spin_unlock_bh(®_pending_beacons_lock); 26773ebfa6e7SLuis R. Rodriguez 26783ebfa6e7SLuis R. Rodriguez if (processing) 2679e38f8a7aSLuis R. Rodriguez return 0; 2680e38f8a7aSLuis R. Rodriguez 2681e38f8a7aSLuis R. Rodriguez reg_beacon = kzalloc(sizeof(struct reg_beacon), gfp); 2682e38f8a7aSLuis R. Rodriguez if (!reg_beacon) 2683e38f8a7aSLuis R. Rodriguez return -ENOMEM; 2684e38f8a7aSLuis R. Rodriguez 26851a919318SJohannes Berg REG_DBG_PRINT("Found new beacon on frequency: %d MHz (Ch %d) on %s\n", 2686e38f8a7aSLuis R. Rodriguez beacon_chan->center_freq, 2687e38f8a7aSLuis R. Rodriguez ieee80211_frequency_to_channel(beacon_chan->center_freq), 2688e38f8a7aSLuis R. Rodriguez wiphy_name(wiphy)); 26894113f751SLuis R. Rodriguez 2690e38f8a7aSLuis R. Rodriguez memcpy(®_beacon->chan, beacon_chan, 2691e38f8a7aSLuis R. Rodriguez sizeof(struct ieee80211_channel)); 2692e38f8a7aSLuis R. Rodriguez 2693e38f8a7aSLuis R. Rodriguez /* 2694e38f8a7aSLuis R. Rodriguez * Since we can be called from BH or and non-BH context 2695e38f8a7aSLuis R. Rodriguez * we must use spin_lock_bh() 2696e38f8a7aSLuis R. Rodriguez */ 2697e38f8a7aSLuis R. Rodriguez spin_lock_bh(®_pending_beacons_lock); 2698e38f8a7aSLuis R. Rodriguez list_add_tail(®_beacon->list, ®_pending_beacons); 2699e38f8a7aSLuis R. Rodriguez spin_unlock_bh(®_pending_beacons_lock); 2700e38f8a7aSLuis R. Rodriguez 2701e38f8a7aSLuis R. Rodriguez schedule_work(®_work); 2702e38f8a7aSLuis R. Rodriguez 2703e38f8a7aSLuis R. Rodriguez return 0; 2704e38f8a7aSLuis R. Rodriguez } 2705e38f8a7aSLuis R. Rodriguez 2706a3d2eaf0SJohannes Berg static void print_rd_rules(const struct ieee80211_regdomain *rd) 2707b2e1b302SLuis R. Rodriguez { 2708b2e1b302SLuis R. Rodriguez unsigned int i; 2709a3d2eaf0SJohannes Berg const struct ieee80211_reg_rule *reg_rule = NULL; 2710a3d2eaf0SJohannes Berg const struct ieee80211_freq_range *freq_range = NULL; 2711a3d2eaf0SJohannes Berg const struct ieee80211_power_rule *power_rule = NULL; 2712089027e5SJanusz Dziedzic char bw[32], cac_time[32]; 2713b2e1b302SLuis R. Rodriguez 2714089027e5SJanusz Dziedzic pr_info(" (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp), (dfs_cac_time)\n"); 2715b2e1b302SLuis R. Rodriguez 2716b2e1b302SLuis R. Rodriguez for (i = 0; i < rd->n_reg_rules; i++) { 2717b2e1b302SLuis R. Rodriguez reg_rule = &rd->reg_rules[i]; 2718b2e1b302SLuis R. Rodriguez freq_range = ®_rule->freq_range; 2719b2e1b302SLuis R. Rodriguez power_rule = ®_rule->power_rule; 2720b2e1b302SLuis R. Rodriguez 2721b0dfd2eaSJanusz Dziedzic if (reg_rule->flags & NL80211_RRF_AUTO_BW) 2722b0dfd2eaSJanusz Dziedzic snprintf(bw, sizeof(bw), "%d KHz, %d KHz AUTO", 2723b0dfd2eaSJanusz Dziedzic freq_range->max_bandwidth_khz, 272497524820SJanusz Dziedzic reg_get_max_bandwidth(rd, reg_rule)); 272597524820SJanusz Dziedzic else 2726b0dfd2eaSJanusz Dziedzic snprintf(bw, sizeof(bw), "%d KHz", 272797524820SJanusz Dziedzic freq_range->max_bandwidth_khz); 272897524820SJanusz Dziedzic 2729089027e5SJanusz Dziedzic if (reg_rule->flags & NL80211_RRF_DFS) 2730089027e5SJanusz Dziedzic scnprintf(cac_time, sizeof(cac_time), "%u s", 2731089027e5SJanusz Dziedzic reg_rule->dfs_cac_ms/1000); 2732089027e5SJanusz Dziedzic else 2733089027e5SJanusz Dziedzic scnprintf(cac_time, sizeof(cac_time), "N/A"); 2734089027e5SJanusz Dziedzic 2735089027e5SJanusz Dziedzic 2736fb1fc7adSLuis R. Rodriguez /* 2737fb1fc7adSLuis R. Rodriguez * There may not be documentation for max antenna gain 2738fb1fc7adSLuis R. Rodriguez * in certain regions 2739fb1fc7adSLuis R. Rodriguez */ 2740b2e1b302SLuis R. Rodriguez if (power_rule->max_antenna_gain) 2741089027e5SJanusz Dziedzic pr_info(" (%d KHz - %d KHz @ %s), (%d mBi, %d mBm), (%s)\n", 2742b2e1b302SLuis R. Rodriguez freq_range->start_freq_khz, 2743b2e1b302SLuis R. Rodriguez freq_range->end_freq_khz, 274497524820SJanusz Dziedzic bw, 2745b2e1b302SLuis R. Rodriguez power_rule->max_antenna_gain, 2746089027e5SJanusz Dziedzic power_rule->max_eirp, 2747089027e5SJanusz Dziedzic cac_time); 2748b2e1b302SLuis R. Rodriguez else 2749089027e5SJanusz Dziedzic pr_info(" (%d KHz - %d KHz @ %s), (N/A, %d mBm), (%s)\n", 2750b2e1b302SLuis R. Rodriguez freq_range->start_freq_khz, 2751b2e1b302SLuis R. Rodriguez freq_range->end_freq_khz, 275297524820SJanusz Dziedzic bw, 2753089027e5SJanusz Dziedzic power_rule->max_eirp, 2754089027e5SJanusz Dziedzic cac_time); 2755b2e1b302SLuis R. Rodriguez } 2756b2e1b302SLuis R. Rodriguez } 2757b2e1b302SLuis R. Rodriguez 27584c7d3982SLuis R. Rodriguez bool reg_supported_dfs_region(enum nl80211_dfs_regions dfs_region) 27598b60b078SLuis R. Rodriguez { 27608b60b078SLuis R. Rodriguez switch (dfs_region) { 27618b60b078SLuis R. Rodriguez case NL80211_DFS_UNSET: 27628b60b078SLuis R. Rodriguez case NL80211_DFS_FCC: 27638b60b078SLuis R. Rodriguez case NL80211_DFS_ETSI: 27648b60b078SLuis R. Rodriguez case NL80211_DFS_JP: 27658b60b078SLuis R. Rodriguez return true; 27668b60b078SLuis R. Rodriguez default: 27678b60b078SLuis R. Rodriguez REG_DBG_PRINT("Ignoring uknown DFS master region: %d\n", 27688b60b078SLuis R. Rodriguez dfs_region); 27698b60b078SLuis R. Rodriguez return false; 27708b60b078SLuis R. Rodriguez } 27718b60b078SLuis R. Rodriguez } 27728b60b078SLuis R. Rodriguez 2773a3d2eaf0SJohannes Berg static void print_regdomain(const struct ieee80211_regdomain *rd) 2774b2e1b302SLuis R. Rodriguez { 2775c492db37SJohannes Berg struct regulatory_request *lr = get_last_request(); 2776b2e1b302SLuis R. Rodriguez 27773f2355cbSLuis R. Rodriguez if (is_intersected_alpha2(rd->alpha2)) { 2778c492db37SJohannes Berg if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) { 277979c97e97SJohannes Berg struct cfg80211_registered_device *rdev; 2780c492db37SJohannes Berg rdev = cfg80211_rdev_by_wiphy_idx(lr->wiphy_idx); 278179c97e97SJohannes Berg if (rdev) { 2782e9c0268fSJoe Perches pr_info("Current regulatory domain updated by AP to: %c%c\n", 278379c97e97SJohannes Berg rdev->country_ie_alpha2[0], 278479c97e97SJohannes Berg rdev->country_ie_alpha2[1]); 27853f2355cbSLuis R. Rodriguez } else 2786e9c0268fSJoe Perches pr_info("Current regulatory domain intersected:\n"); 27873f2355cbSLuis R. Rodriguez } else 2788e9c0268fSJoe Perches pr_info("Current regulatory domain intersected:\n"); 27891a919318SJohannes Berg } else if (is_world_regdom(rd->alpha2)) { 2790e9c0268fSJoe Perches pr_info("World regulatory domain updated:\n"); 27911a919318SJohannes Berg } else { 2792b2e1b302SLuis R. Rodriguez if (is_unknown_alpha2(rd->alpha2)) 2793e9c0268fSJoe Perches pr_info("Regulatory domain changed to driver built-in settings (unknown country)\n"); 279457b5ce07SLuis R. Rodriguez else { 2795c492db37SJohannes Berg if (reg_request_cell_base(lr)) 27961a919318SJohannes Berg pr_info("Regulatory domain changed to country: %c%c by Cell Station\n", 2797b2e1b302SLuis R. Rodriguez rd->alpha2[0], rd->alpha2[1]); 279857b5ce07SLuis R. Rodriguez else 27991a919318SJohannes Berg pr_info("Regulatory domain changed to country: %c%c\n", 280057b5ce07SLuis R. Rodriguez rd->alpha2[0], rd->alpha2[1]); 280157b5ce07SLuis R. Rodriguez } 2802b2e1b302SLuis R. Rodriguez } 28031a919318SJohannes Berg 28043ef121b5SLuis R. Rodriguez pr_info(" DFS Master region: %s", reg_dfs_region_str(rd->dfs_region)); 2805b2e1b302SLuis R. Rodriguez print_rd_rules(rd); 2806b2e1b302SLuis R. Rodriguez } 2807b2e1b302SLuis R. Rodriguez 28082df78167SJohannes Berg static void print_regdomain_info(const struct ieee80211_regdomain *rd) 2809b2e1b302SLuis R. Rodriguez { 2810e9c0268fSJoe Perches pr_info("Regulatory domain: %c%c\n", rd->alpha2[0], rd->alpha2[1]); 2811b2e1b302SLuis R. Rodriguez print_rd_rules(rd); 2812b2e1b302SLuis R. Rodriguez } 2813b2e1b302SLuis R. Rodriguez 28143b9e5acaSLuis R. Rodriguez static int reg_set_rd_core(const struct ieee80211_regdomain *rd) 28153b9e5acaSLuis R. Rodriguez { 28163b9e5acaSLuis R. Rodriguez if (!is_world_regdom(rd->alpha2)) 28173b9e5acaSLuis R. Rodriguez return -EINVAL; 28183b9e5acaSLuis R. Rodriguez update_world_regdomain(rd); 28193b9e5acaSLuis R. Rodriguez return 0; 28203b9e5acaSLuis R. Rodriguez } 28213b9e5acaSLuis R. Rodriguez 282284721d44SLuis R. Rodriguez static int reg_set_rd_user(const struct ieee80211_regdomain *rd, 282384721d44SLuis R. Rodriguez struct regulatory_request *user_request) 282484721d44SLuis R. Rodriguez { 282584721d44SLuis R. Rodriguez const struct ieee80211_regdomain *intersected_rd = NULL; 282684721d44SLuis R. Rodriguez 282784721d44SLuis R. Rodriguez if (!regdom_changes(rd->alpha2)) 282884721d44SLuis R. Rodriguez return -EALREADY; 282984721d44SLuis R. Rodriguez 283084721d44SLuis R. Rodriguez if (!is_valid_rd(rd)) { 283184721d44SLuis R. Rodriguez pr_err("Invalid regulatory domain detected:\n"); 283284721d44SLuis R. Rodriguez print_regdomain_info(rd); 283384721d44SLuis R. Rodriguez return -EINVAL; 283484721d44SLuis R. Rodriguez } 283584721d44SLuis R. Rodriguez 283684721d44SLuis R. Rodriguez if (!user_request->intersect) { 283784721d44SLuis R. Rodriguez reset_regdomains(false, rd); 283884721d44SLuis R. Rodriguez return 0; 283984721d44SLuis R. Rodriguez } 284084721d44SLuis R. Rodriguez 284184721d44SLuis R. Rodriguez intersected_rd = regdom_intersect(rd, get_cfg80211_regdom()); 284284721d44SLuis R. Rodriguez if (!intersected_rd) 284384721d44SLuis R. Rodriguez return -EINVAL; 284484721d44SLuis R. Rodriguez 284584721d44SLuis R. Rodriguez kfree(rd); 284684721d44SLuis R. Rodriguez rd = NULL; 284784721d44SLuis R. Rodriguez reset_regdomains(false, intersected_rd); 284884721d44SLuis R. Rodriguez 284984721d44SLuis R. Rodriguez return 0; 285084721d44SLuis R. Rodriguez } 285184721d44SLuis R. Rodriguez 2852f5fe3247SLuis R. Rodriguez static int reg_set_rd_driver(const struct ieee80211_regdomain *rd, 2853f5fe3247SLuis R. Rodriguez struct regulatory_request *driver_request) 2854b2e1b302SLuis R. Rodriguez { 2855e9763c3cSJohannes Berg const struct ieee80211_regdomain *regd; 28569c96477dSLuis R. Rodriguez const struct ieee80211_regdomain *intersected_rd = NULL; 2857f5fe3247SLuis R. Rodriguez const struct ieee80211_regdomain *tmp; 2858806a9e39SLuis R. Rodriguez struct wiphy *request_wiphy; 28596913b49aSJohannes Berg 2860f5fe3247SLuis R. Rodriguez if (is_world_regdom(rd->alpha2)) 2861b2e1b302SLuis R. Rodriguez return -EINVAL; 2862b2e1b302SLuis R. Rodriguez 2863baeb66feSJohn W. Linville if (!regdom_changes(rd->alpha2)) 286495908535SKalle Valo return -EALREADY; 2865b2e1b302SLuis R. Rodriguez 2866b2e1b302SLuis R. Rodriguez if (!is_valid_rd(rd)) { 2867e9c0268fSJoe Perches pr_err("Invalid regulatory domain detected:\n"); 2868b2e1b302SLuis R. Rodriguez print_regdomain_info(rd); 2869b2e1b302SLuis R. Rodriguez return -EINVAL; 2870b2e1b302SLuis R. Rodriguez } 2871b2e1b302SLuis R. Rodriguez 2872f5fe3247SLuis R. Rodriguez request_wiphy = wiphy_idx_to_wiphy(driver_request->wiphy_idx); 2873f5fe3247SLuis R. Rodriguez if (!request_wiphy) { 2874845f3351SShaibal Dutta queue_delayed_work(system_power_efficient_wq, 2875845f3351SShaibal Dutta ®_timeout, 0); 2876de3584bdSJohannes Berg return -ENODEV; 2877de3584bdSJohannes Berg } 2878806a9e39SLuis R. Rodriguez 2879f5fe3247SLuis R. Rodriguez if (!driver_request->intersect) { 2880558f6d32SLuis R. Rodriguez if (request_wiphy->regd) 2881558f6d32SLuis R. Rodriguez return -EALREADY; 28823e0c3ff3SLuis R. Rodriguez 2883e9763c3cSJohannes Berg regd = reg_copy_regd(rd); 2884e9763c3cSJohannes Berg if (IS_ERR(regd)) 2885e9763c3cSJohannes Berg return PTR_ERR(regd); 28863e0c3ff3SLuis R. Rodriguez 2887458f4f9eSJohannes Berg rcu_assign_pointer(request_wiphy->regd, regd); 2888379b82f4SJohannes Berg reset_regdomains(false, rd); 2889b8295acdSLuis R. Rodriguez return 0; 2890b8295acdSLuis R. Rodriguez } 2891b8295acdSLuis R. Rodriguez 2892458f4f9eSJohannes Berg intersected_rd = regdom_intersect(rd, get_cfg80211_regdom()); 28939c96477dSLuis R. Rodriguez if (!intersected_rd) 28949c96477dSLuis R. Rodriguez return -EINVAL; 2895b8295acdSLuis R. Rodriguez 2896fb1fc7adSLuis R. Rodriguez /* 2897fb1fc7adSLuis R. Rodriguez * We can trash what CRDA provided now. 28983e0c3ff3SLuis R. Rodriguez * However if a driver requested this specific regulatory 2899fb1fc7adSLuis R. Rodriguez * domain we keep it for its private use 2900fb1fc7adSLuis R. Rodriguez */ 2901b7566fc3SLarry Finger tmp = get_wiphy_regdom(request_wiphy); 2902458f4f9eSJohannes Berg rcu_assign_pointer(request_wiphy->regd, rd); 2903b7566fc3SLarry Finger rcu_free_regdom(tmp); 29043e0c3ff3SLuis R. Rodriguez 2905b8295acdSLuis R. Rodriguez rd = NULL; 2906b8295acdSLuis R. Rodriguez 2907379b82f4SJohannes Berg reset_regdomains(false, intersected_rd); 2908b8295acdSLuis R. Rodriguez 2909b8295acdSLuis R. Rodriguez return 0; 29109c96477dSLuis R. Rodriguez } 29119c96477dSLuis R. Rodriguez 291201992406SLuis R. Rodriguez static int reg_set_rd_country_ie(const struct ieee80211_regdomain *rd, 291301992406SLuis R. Rodriguez struct regulatory_request *country_ie_request) 2914f5fe3247SLuis R. Rodriguez { 2915f5fe3247SLuis R. Rodriguez struct wiphy *request_wiphy; 2916f5fe3247SLuis R. Rodriguez 2917f5fe3247SLuis R. Rodriguez if (!is_alpha2_set(rd->alpha2) && !is_an_alpha2(rd->alpha2) && 2918f5fe3247SLuis R. Rodriguez !is_unknown_alpha2(rd->alpha2)) 2919f5fe3247SLuis R. Rodriguez return -EINVAL; 2920f5fe3247SLuis R. Rodriguez 2921f5fe3247SLuis R. Rodriguez /* 2922f5fe3247SLuis R. Rodriguez * Lets only bother proceeding on the same alpha2 if the current 2923f5fe3247SLuis R. Rodriguez * rd is non static (it means CRDA was present and was used last) 2924f5fe3247SLuis R. Rodriguez * and the pending request came in from a country IE 2925f5fe3247SLuis R. Rodriguez */ 2926f5fe3247SLuis R. Rodriguez 2927f5fe3247SLuis R. Rodriguez if (!is_valid_rd(rd)) { 2928f5fe3247SLuis R. Rodriguez pr_err("Invalid regulatory domain detected:\n"); 2929f5fe3247SLuis R. Rodriguez print_regdomain_info(rd); 29303f2355cbSLuis R. Rodriguez return -EINVAL; 2931b2e1b302SLuis R. Rodriguez } 2932b2e1b302SLuis R. Rodriguez 293301992406SLuis R. Rodriguez request_wiphy = wiphy_idx_to_wiphy(country_ie_request->wiphy_idx); 2934f5fe3247SLuis R. Rodriguez if (!request_wiphy) { 2935845f3351SShaibal Dutta queue_delayed_work(system_power_efficient_wq, 2936845f3351SShaibal Dutta ®_timeout, 0); 2937f5fe3247SLuis R. Rodriguez return -ENODEV; 2938f5fe3247SLuis R. Rodriguez } 2939f5fe3247SLuis R. Rodriguez 294001992406SLuis R. Rodriguez if (country_ie_request->intersect) 2941f5fe3247SLuis R. Rodriguez return -EINVAL; 2942f5fe3247SLuis R. Rodriguez 2943f5fe3247SLuis R. Rodriguez reset_regdomains(false, rd); 2944f5fe3247SLuis R. Rodriguez return 0; 2945f5fe3247SLuis R. Rodriguez } 2946b2e1b302SLuis R. Rodriguez 2947fb1fc7adSLuis R. Rodriguez /* 2948fb1fc7adSLuis R. Rodriguez * Use this call to set the current regulatory domain. Conflicts with 2949b2e1b302SLuis R. Rodriguez * multiple drivers can be ironed out later. Caller must've already 2950458f4f9eSJohannes Berg * kmalloc'd the rd structure. 2951fb1fc7adSLuis R. Rodriguez */ 2952c37722bdSIlan peer int set_regdom(const struct ieee80211_regdomain *rd, 2953c37722bdSIlan peer enum ieee80211_regd_source regd_src) 2954b2e1b302SLuis R. Rodriguez { 2955c492db37SJohannes Berg struct regulatory_request *lr; 2956092008abSJanusz Dziedzic bool user_reset = false; 2957b2e1b302SLuis R. Rodriguez int r; 2958b2e1b302SLuis R. Rodriguez 29593b9e5acaSLuis R. Rodriguez if (!reg_is_valid_request(rd->alpha2)) { 29603b9e5acaSLuis R. Rodriguez kfree(rd); 29613b9e5acaSLuis R. Rodriguez return -EINVAL; 29623b9e5acaSLuis R. Rodriguez } 29633b9e5acaSLuis R. Rodriguez 2964c37722bdSIlan peer if (regd_src == REGD_SOURCE_CRDA) 2965c37722bdSIlan peer reg_crda_timeouts = 0; 2966c37722bdSIlan peer 2967c492db37SJohannes Berg lr = get_last_request(); 2968abc7381bSLuis R. Rodriguez 2969b2e1b302SLuis R. Rodriguez /* Note that this doesn't update the wiphys, this is done below */ 29703b9e5acaSLuis R. Rodriguez switch (lr->initiator) { 29713b9e5acaSLuis R. Rodriguez case NL80211_REGDOM_SET_BY_CORE: 29723b9e5acaSLuis R. Rodriguez r = reg_set_rd_core(rd); 29733b9e5acaSLuis R. Rodriguez break; 29743b9e5acaSLuis R. Rodriguez case NL80211_REGDOM_SET_BY_USER: 297584721d44SLuis R. Rodriguez r = reg_set_rd_user(rd, lr); 2976092008abSJanusz Dziedzic user_reset = true; 297784721d44SLuis R. Rodriguez break; 29783b9e5acaSLuis R. Rodriguez case NL80211_REGDOM_SET_BY_DRIVER: 2979f5fe3247SLuis R. Rodriguez r = reg_set_rd_driver(rd, lr); 2980f5fe3247SLuis R. Rodriguez break; 29813b9e5acaSLuis R. Rodriguez case NL80211_REGDOM_SET_BY_COUNTRY_IE: 298201992406SLuis R. Rodriguez r = reg_set_rd_country_ie(rd, lr); 29833b9e5acaSLuis R. Rodriguez break; 29843b9e5acaSLuis R. Rodriguez default: 29853b9e5acaSLuis R. Rodriguez WARN(1, "invalid initiator %d\n", lr->initiator); 29863b9e5acaSLuis R. Rodriguez return -EINVAL; 29873b9e5acaSLuis R. Rodriguez } 29883b9e5acaSLuis R. Rodriguez 2989d2372b31SJohannes Berg if (r) { 2990092008abSJanusz Dziedzic switch (r) { 2991092008abSJanusz Dziedzic case -EALREADY: 299295908535SKalle Valo reg_set_request_processed(); 2993092008abSJanusz Dziedzic break; 2994092008abSJanusz Dziedzic default: 2995092008abSJanusz Dziedzic /* Back to world regulatory in case of errors */ 2996092008abSJanusz Dziedzic restore_regulatory_settings(user_reset); 2997092008abSJanusz Dziedzic } 299895908535SKalle Valo 2999d2372b31SJohannes Berg kfree(rd); 300038fd2143SJohannes Berg return r; 3001d2372b31SJohannes Berg } 3002b2e1b302SLuis R. Rodriguez 3003b2e1b302SLuis R. Rodriguez /* This would make this whole thing pointless */ 300438fd2143SJohannes Berg if (WARN_ON(!lr->intersect && rd != get_cfg80211_regdom())) 300538fd2143SJohannes Berg return -EINVAL; 3006b2e1b302SLuis R. Rodriguez 3007b2e1b302SLuis R. Rodriguez /* update all wiphys now with the new established regulatory domain */ 3008c492db37SJohannes Berg update_all_wiphy_regulatory(lr->initiator); 3009b2e1b302SLuis R. Rodriguez 3010458f4f9eSJohannes Berg print_regdomain(get_cfg80211_regdom()); 3011b2e1b302SLuis R. Rodriguez 3012c492db37SJohannes Berg nl80211_send_reg_change_event(lr); 301373d54c9eSLuis R. Rodriguez 3014b2e253cfSLuis R. Rodriguez reg_set_request_processed(); 3015b2e253cfSLuis R. Rodriguez 301638fd2143SJohannes Berg return 0; 3017b2e1b302SLuis R. Rodriguez } 3018b2e1b302SLuis R. Rodriguez 30192c3e861cSArik Nemtsov static int __regulatory_set_wiphy_regd(struct wiphy *wiphy, 3020b0d7aa59SJonathan Doron struct ieee80211_regdomain *rd) 3021b0d7aa59SJonathan Doron { 3022b0d7aa59SJonathan Doron const struct ieee80211_regdomain *regd; 3023b0d7aa59SJonathan Doron const struct ieee80211_regdomain *prev_regd; 3024b0d7aa59SJonathan Doron struct cfg80211_registered_device *rdev; 3025b0d7aa59SJonathan Doron 3026b0d7aa59SJonathan Doron if (WARN_ON(!wiphy || !rd)) 3027b0d7aa59SJonathan Doron return -EINVAL; 3028b0d7aa59SJonathan Doron 3029b0d7aa59SJonathan Doron if (WARN(!(wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED), 3030b0d7aa59SJonathan Doron "wiphy should have REGULATORY_WIPHY_SELF_MANAGED\n")) 3031b0d7aa59SJonathan Doron return -EPERM; 3032b0d7aa59SJonathan Doron 3033b0d7aa59SJonathan Doron if (WARN(!is_valid_rd(rd), "Invalid regulatory domain detected\n")) { 3034b0d7aa59SJonathan Doron print_regdomain_info(rd); 3035b0d7aa59SJonathan Doron return -EINVAL; 3036b0d7aa59SJonathan Doron } 3037b0d7aa59SJonathan Doron 3038b0d7aa59SJonathan Doron regd = reg_copy_regd(rd); 3039b0d7aa59SJonathan Doron if (IS_ERR(regd)) 3040b0d7aa59SJonathan Doron return PTR_ERR(regd); 3041b0d7aa59SJonathan Doron 3042b0d7aa59SJonathan Doron rdev = wiphy_to_rdev(wiphy); 3043b0d7aa59SJonathan Doron 3044b0d7aa59SJonathan Doron spin_lock(®_requests_lock); 3045b0d7aa59SJonathan Doron prev_regd = rdev->requested_regd; 3046b0d7aa59SJonathan Doron rdev->requested_regd = regd; 3047b0d7aa59SJonathan Doron spin_unlock(®_requests_lock); 3048b0d7aa59SJonathan Doron 3049b0d7aa59SJonathan Doron kfree(prev_regd); 30502c3e861cSArik Nemtsov return 0; 30512c3e861cSArik Nemtsov } 30522c3e861cSArik Nemtsov 30532c3e861cSArik Nemtsov int regulatory_set_wiphy_regd(struct wiphy *wiphy, 30542c3e861cSArik Nemtsov struct ieee80211_regdomain *rd) 30552c3e861cSArik Nemtsov { 30562c3e861cSArik Nemtsov int ret = __regulatory_set_wiphy_regd(wiphy, rd); 30572c3e861cSArik Nemtsov 30582c3e861cSArik Nemtsov if (ret) 30592c3e861cSArik Nemtsov return ret; 3060b0d7aa59SJonathan Doron 3061b0d7aa59SJonathan Doron schedule_work(®_work); 3062b0d7aa59SJonathan Doron return 0; 3063b0d7aa59SJonathan Doron } 3064b0d7aa59SJonathan Doron EXPORT_SYMBOL(regulatory_set_wiphy_regd); 3065b0d7aa59SJonathan Doron 30662c3e861cSArik Nemtsov int regulatory_set_wiphy_regd_sync_rtnl(struct wiphy *wiphy, 30672c3e861cSArik Nemtsov struct ieee80211_regdomain *rd) 30682c3e861cSArik Nemtsov { 30692c3e861cSArik Nemtsov int ret; 30702c3e861cSArik Nemtsov 30712c3e861cSArik Nemtsov ASSERT_RTNL(); 30722c3e861cSArik Nemtsov 30732c3e861cSArik Nemtsov ret = __regulatory_set_wiphy_regd(wiphy, rd); 30742c3e861cSArik Nemtsov if (ret) 30752c3e861cSArik Nemtsov return ret; 30762c3e861cSArik Nemtsov 30772c3e861cSArik Nemtsov /* process the request immediately */ 30782c3e861cSArik Nemtsov reg_process_self_managed_hints(); 30792c3e861cSArik Nemtsov return 0; 30802c3e861cSArik Nemtsov } 30812c3e861cSArik Nemtsov EXPORT_SYMBOL(regulatory_set_wiphy_regd_sync_rtnl); 30822c3e861cSArik Nemtsov 308357b5ce07SLuis R. Rodriguez void wiphy_regulatory_register(struct wiphy *wiphy) 308457b5ce07SLuis R. Rodriguez { 308523df0b73SArik Nemtsov struct regulatory_request *lr; 308623df0b73SArik Nemtsov 3087b0d7aa59SJonathan Doron /* self-managed devices ignore external hints */ 3088b0d7aa59SJonathan Doron if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) 3089b0d7aa59SJonathan Doron wiphy->regulatory_flags |= REGULATORY_DISABLE_BEACON_HINTS | 3090b0d7aa59SJonathan Doron REGULATORY_COUNTRY_IE_IGNORE; 3091b0d7aa59SJonathan Doron 309257b5ce07SLuis R. Rodriguez if (!reg_dev_ignore_cell_hint(wiphy)) 309357b5ce07SLuis R. Rodriguez reg_num_devs_support_basehint++; 309457b5ce07SLuis R. Rodriguez 309523df0b73SArik Nemtsov lr = get_last_request(); 309623df0b73SArik Nemtsov wiphy_update_regulatory(wiphy, lr->initiator); 309757b5ce07SLuis R. Rodriguez } 309857b5ce07SLuis R. Rodriguez 3099bfead080SLuis R. Rodriguez void wiphy_regulatory_deregister(struct wiphy *wiphy) 31003f2355cbSLuis R. Rodriguez { 31010ad8acafSLuis R. Rodriguez struct wiphy *request_wiphy = NULL; 3102c492db37SJohannes Berg struct regulatory_request *lr; 3103761cf7ecSLuis R. Rodriguez 3104c492db37SJohannes Berg lr = get_last_request(); 3105abc7381bSLuis R. Rodriguez 310657b5ce07SLuis R. Rodriguez if (!reg_dev_ignore_cell_hint(wiphy)) 310757b5ce07SLuis R. Rodriguez reg_num_devs_support_basehint--; 310857b5ce07SLuis R. Rodriguez 3109458f4f9eSJohannes Berg rcu_free_regdom(get_wiphy_regdom(wiphy)); 311034dd886cSMonam Agarwal RCU_INIT_POINTER(wiphy->regd, NULL); 31110ef9ccddSChris Wright 3112c492db37SJohannes Berg if (lr) 3113c492db37SJohannes Berg request_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx); 3114806a9e39SLuis R. Rodriguez 31150ef9ccddSChris Wright if (!request_wiphy || request_wiphy != wiphy) 311638fd2143SJohannes Berg return; 31170ef9ccddSChris Wright 3118c492db37SJohannes Berg lr->wiphy_idx = WIPHY_IDX_INVALID; 3119c492db37SJohannes Berg lr->country_ie_env = ENVIRON_ANY; 31203f2355cbSLuis R. Rodriguez } 31213f2355cbSLuis R. Rodriguez 3122a90c7a31SLuis R. Rodriguez static void reg_timeout_work(struct work_struct *work) 3123a90c7a31SLuis R. Rodriguez { 31241a919318SJohannes Berg REG_DBG_PRINT("Timeout while waiting for CRDA to reply, restoring regulatory settings\n"); 3125f77b86d7SJohannes Berg rtnl_lock(); 3126c37722bdSIlan peer reg_crda_timeouts++; 3127a90c7a31SLuis R. Rodriguez restore_regulatory_settings(true); 3128f77b86d7SJohannes Berg rtnl_unlock(); 3129a90c7a31SLuis R. Rodriguez } 3130a90c7a31SLuis R. Rodriguez 3131174e0cd2SIlan Peer /* 3132174e0cd2SIlan Peer * See http://www.fcc.gov/document/5-ghz-unlicensed-spectrum-unii, for 3133174e0cd2SIlan Peer * UNII band definitions 3134174e0cd2SIlan Peer */ 3135174e0cd2SIlan Peer int cfg80211_get_unii(int freq) 3136174e0cd2SIlan Peer { 3137174e0cd2SIlan Peer /* UNII-1 */ 3138174e0cd2SIlan Peer if (freq >= 5150 && freq <= 5250) 3139174e0cd2SIlan Peer return 0; 3140174e0cd2SIlan Peer 3141174e0cd2SIlan Peer /* UNII-2A */ 3142174e0cd2SIlan Peer if (freq > 5250 && freq <= 5350) 3143174e0cd2SIlan Peer return 1; 3144174e0cd2SIlan Peer 3145174e0cd2SIlan Peer /* UNII-2B */ 3146174e0cd2SIlan Peer if (freq > 5350 && freq <= 5470) 3147174e0cd2SIlan Peer return 2; 3148174e0cd2SIlan Peer 3149174e0cd2SIlan Peer /* UNII-2C */ 3150174e0cd2SIlan Peer if (freq > 5470 && freq <= 5725) 3151174e0cd2SIlan Peer return 3; 3152174e0cd2SIlan Peer 3153174e0cd2SIlan Peer /* UNII-3 */ 3154174e0cd2SIlan Peer if (freq > 5725 && freq <= 5825) 3155174e0cd2SIlan Peer return 4; 3156174e0cd2SIlan Peer 3157174e0cd2SIlan Peer return -EINVAL; 3158174e0cd2SIlan Peer } 3159174e0cd2SIlan Peer 3160c8866e55SIlan Peer bool regulatory_indoor_allowed(void) 3161c8866e55SIlan Peer { 3162c8866e55SIlan Peer return reg_is_indoor; 3163c8866e55SIlan Peer } 3164c8866e55SIlan Peer 31652fcc9f73SUwe Kleine-König int __init regulatory_init(void) 3166b2e1b302SLuis R. Rodriguez { 3167bcf4f99bSLuis R. Rodriguez int err = 0; 3168734366deSJohannes Berg 3169b2e1b302SLuis R. Rodriguez reg_pdev = platform_device_register_simple("regulatory", 0, NULL, 0); 3170b2e1b302SLuis R. Rodriguez if (IS_ERR(reg_pdev)) 3171b2e1b302SLuis R. Rodriguez return PTR_ERR(reg_pdev); 3172734366deSJohannes Berg 3173fe33eb39SLuis R. Rodriguez spin_lock_init(®_requests_lock); 3174e38f8a7aSLuis R. Rodriguez spin_lock_init(®_pending_beacons_lock); 317505050753SIlan peer spin_lock_init(®_indoor_lock); 3176fe33eb39SLuis R. Rodriguez 317780007efeSLuis R. Rodriguez reg_regdb_size_check(); 317880007efeSLuis R. Rodriguez 3179458f4f9eSJohannes Berg rcu_assign_pointer(cfg80211_regdomain, cfg80211_world_regdom); 3180734366deSJohannes Berg 318109d989d1SLuis R. Rodriguez user_alpha2[0] = '9'; 318209d989d1SLuis R. Rodriguez user_alpha2[1] = '7'; 318309d989d1SLuis R. Rodriguez 3184ae9e4b0dSLuis R. Rodriguez /* We always try to get an update for the static regdomain */ 3185458f4f9eSJohannes Berg err = regulatory_hint_core(cfg80211_world_regdom->alpha2); 3186bcf4f99bSLuis R. Rodriguez if (err) { 3187bcf4f99bSLuis R. Rodriguez if (err == -ENOMEM) 3188bcf4f99bSLuis R. Rodriguez return err; 3189bcf4f99bSLuis R. Rodriguez /* 3190bcf4f99bSLuis R. Rodriguez * N.B. kobject_uevent_env() can fail mainly for when we're out 3191bcf4f99bSLuis R. Rodriguez * memory which is handled and propagated appropriately above 3192bcf4f99bSLuis R. Rodriguez * but it can also fail during a netlink_broadcast() or during 3193bcf4f99bSLuis R. Rodriguez * early boot for call_usermodehelper(). For now treat these 3194bcf4f99bSLuis R. Rodriguez * errors as non-fatal. 3195bcf4f99bSLuis R. Rodriguez */ 3196e9c0268fSJoe Perches pr_err("kobject_uevent_env() was unable to call CRDA during init\n"); 3197bcf4f99bSLuis R. Rodriguez } 3198734366deSJohannes Berg 3199ae9e4b0dSLuis R. Rodriguez /* 3200ae9e4b0dSLuis R. Rodriguez * Finally, if the user set the module parameter treat it 3201ae9e4b0dSLuis R. Rodriguez * as a user hint. 3202ae9e4b0dSLuis R. Rodriguez */ 3203ae9e4b0dSLuis R. Rodriguez if (!is_world_regdom(ieee80211_regdom)) 320457b5ce07SLuis R. Rodriguez regulatory_hint_user(ieee80211_regdom, 320557b5ce07SLuis R. Rodriguez NL80211_USER_REG_HINT_USER); 3206ae9e4b0dSLuis R. Rodriguez 3207b2e1b302SLuis R. Rodriguez return 0; 3208b2e1b302SLuis R. Rodriguez } 3209b2e1b302SLuis R. Rodriguez 32101a919318SJohannes Berg void regulatory_exit(void) 3211b2e1b302SLuis R. Rodriguez { 3212fe33eb39SLuis R. Rodriguez struct regulatory_request *reg_request, *tmp; 3213e38f8a7aSLuis R. Rodriguez struct reg_beacon *reg_beacon, *btmp; 3214fe33eb39SLuis R. Rodriguez 3215fe33eb39SLuis R. Rodriguez cancel_work_sync(®_work); 3216a90c7a31SLuis R. Rodriguez cancel_delayed_work_sync(®_timeout); 3217ad932f04SArik Nemtsov cancel_delayed_work_sync(®_check_chans); 3218fe33eb39SLuis R. Rodriguez 32199027b149SJohannes Berg /* Lock to suppress warnings */ 322038fd2143SJohannes Berg rtnl_lock(); 3221379b82f4SJohannes Berg reset_regdomains(true, NULL); 322238fd2143SJohannes Berg rtnl_unlock(); 3223734366deSJohannes Berg 322458ebacc6SLuis R. Rodriguez dev_set_uevent_suppress(®_pdev->dev, true); 3225f6037d09SJohannes Berg 3226b2e1b302SLuis R. Rodriguez platform_device_unregister(reg_pdev); 3227734366deSJohannes Berg 3228fea9bcedSJohannes Berg list_for_each_entry_safe(reg_beacon, btmp, ®_pending_beacons, list) { 3229e38f8a7aSLuis R. Rodriguez list_del(®_beacon->list); 3230e38f8a7aSLuis R. Rodriguez kfree(reg_beacon); 3231e38f8a7aSLuis R. Rodriguez } 3232e38f8a7aSLuis R. Rodriguez 3233fea9bcedSJohannes Berg list_for_each_entry_safe(reg_beacon, btmp, ®_beacon_list, list) { 3234e38f8a7aSLuis R. Rodriguez list_del(®_beacon->list); 3235e38f8a7aSLuis R. Rodriguez kfree(reg_beacon); 3236e38f8a7aSLuis R. Rodriguez } 3237e38f8a7aSLuis R. Rodriguez 3238fea9bcedSJohannes Berg list_for_each_entry_safe(reg_request, tmp, ®_requests_list, list) { 3239fe33eb39SLuis R. Rodriguez list_del(®_request->list); 3240fe33eb39SLuis R. Rodriguez kfree(reg_request); 3241fe33eb39SLuis R. Rodriguez } 3242fe33eb39SLuis R. Rodriguez } 3243