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> 68318d78aSJohannes Berg * 73b77d5ecSLuis R. Rodriguez * Permission to use, copy, modify, and/or distribute this software for any 83b77d5ecSLuis R. Rodriguez * purpose with or without fee is hereby granted, provided that the above 93b77d5ecSLuis R. Rodriguez * copyright notice and this permission notice appear in all copies. 103b77d5ecSLuis R. Rodriguez * 113b77d5ecSLuis R. Rodriguez * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 123b77d5ecSLuis R. Rodriguez * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 133b77d5ecSLuis R. Rodriguez * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 143b77d5ecSLuis R. Rodriguez * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 153b77d5ecSLuis R. Rodriguez * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 163b77d5ecSLuis R. Rodriguez * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 173b77d5ecSLuis R. Rodriguez * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 188318d78aSJohannes Berg */ 198318d78aSJohannes Berg 203b77d5ecSLuis R. Rodriguez 21b2e1b302SLuis R. Rodriguez /** 22b2e1b302SLuis R. Rodriguez * DOC: Wireless regulatory infrastructure 238318d78aSJohannes Berg * 248318d78aSJohannes Berg * The usual implementation is for a driver to read a device EEPROM to 258318d78aSJohannes Berg * determine which regulatory domain it should be operating under, then 268318d78aSJohannes Berg * looking up the allowable channels in a driver-local table and finally 278318d78aSJohannes Berg * registering those channels in the wiphy structure. 288318d78aSJohannes Berg * 29b2e1b302SLuis R. Rodriguez * Another set of compliance enforcement is for drivers to use their 30b2e1b302SLuis R. Rodriguez * own compliance limits which can be stored on the EEPROM. The host 31b2e1b302SLuis R. Rodriguez * driver or firmware may ensure these are used. 32b2e1b302SLuis R. Rodriguez * 33b2e1b302SLuis R. Rodriguez * In addition to all this we provide an extra layer of regulatory 34b2e1b302SLuis R. Rodriguez * conformance. For drivers which do not have any regulatory 35b2e1b302SLuis R. Rodriguez * information CRDA provides the complete regulatory solution. 36b2e1b302SLuis R. Rodriguez * For others it provides a community effort on further restrictions 37b2e1b302SLuis R. Rodriguez * to enhance compliance. 38b2e1b302SLuis R. Rodriguez * 39b2e1b302SLuis R. Rodriguez * Note: When number of rules --> infinity we will not be able to 40b2e1b302SLuis R. Rodriguez * index on alpha2 any more, instead we'll probably have to 41b2e1b302SLuis R. Rodriguez * rely on some SHA1 checksum of the regdomain for example. 42b2e1b302SLuis R. Rodriguez * 438318d78aSJohannes Berg */ 44e9c0268fSJoe Perches 45e9c0268fSJoe Perches #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 46e9c0268fSJoe Perches 478318d78aSJohannes Berg #include <linux/kernel.h> 48bc3b2d7fSPaul Gortmaker #include <linux/export.h> 495a0e3ad6STejun Heo #include <linux/slab.h> 50b2e1b302SLuis R. Rodriguez #include <linux/list.h> 51c61029c7SJohn W. Linville #include <linux/ctype.h> 52b2e1b302SLuis R. Rodriguez #include <linux/nl80211.h> 53b2e1b302SLuis R. Rodriguez #include <linux/platform_device.h> 54d9b93842SPaul Gortmaker #include <linux/moduleparam.h> 55b2e1b302SLuis R. Rodriguez #include <net/cfg80211.h> 568318d78aSJohannes Berg #include "core.h" 57b2e1b302SLuis R. Rodriguez #include "reg.h" 583b377ea9SJohn W. Linville #include "regdb.h" 5973d54c9eSLuis R. Rodriguez #include "nl80211.h" 608318d78aSJohannes Berg 614113f751SLuis R. Rodriguez #ifdef CONFIG_CFG80211_REG_DEBUG 628271195eSJohn W. Linville #define REG_DBG_PRINT(format, args...) \ 6312c5ffb5SJoe Perches printk(KERN_DEBUG pr_fmt(format), ##args) 644113f751SLuis R. Rodriguez #else 658271195eSJohn W. Linville #define REG_DBG_PRINT(args...) 664113f751SLuis R. Rodriguez #endif 674113f751SLuis R. Rodriguez 682f92212bSJohannes Berg enum reg_request_treatment { 692f92212bSJohannes Berg REG_REQ_OK, 702f92212bSJohannes Berg REG_REQ_IGNORE, 712f92212bSJohannes Berg REG_REQ_INTERSECT, 722f92212bSJohannes Berg REG_REQ_ALREADY_SET, 732f92212bSJohannes Berg }; 742f92212bSJohannes Berg 75a042994dSLuis R. Rodriguez static struct regulatory_request core_request_world = { 76a042994dSLuis R. Rodriguez .initiator = NL80211_REGDOM_SET_BY_CORE, 77a042994dSLuis R. Rodriguez .alpha2[0] = '0', 78a042994dSLuis R. Rodriguez .alpha2[1] = '0', 79a042994dSLuis R. Rodriguez .intersect = false, 80a042994dSLuis R. Rodriguez .processed = true, 81a042994dSLuis R. Rodriguez .country_ie_env = ENVIRON_ANY, 82a042994dSLuis R. Rodriguez }; 83a042994dSLuis R. Rodriguez 845166ccd2SLuis R. Rodriguez /* Receipt of information from last regulatory request */ 85a042994dSLuis R. Rodriguez static struct regulatory_request *last_request = &core_request_world; 86734366deSJohannes Berg 87b2e1b302SLuis R. Rodriguez /* To trigger userspace events */ 88b2e1b302SLuis R. Rodriguez static struct platform_device *reg_pdev; 898318d78aSJohannes Berg 904d9d88d1SScott James Remnant static struct device_type reg_device_type = { 914d9d88d1SScott James Remnant .uevent = reg_device_uevent, 924d9d88d1SScott James Remnant }; 934d9d88d1SScott James Remnant 94fb1fc7adSLuis R. Rodriguez /* 95fb1fc7adSLuis R. Rodriguez * Central wireless core regulatory domains, we only need two, 96734366deSJohannes Berg * the current one and a world regulatory domain in case we have no 97e8da2bb4SJohannes Berg * information to give us an alpha2. 98fb1fc7adSLuis R. Rodriguez */ 99458f4f9eSJohannes Berg const struct ieee80211_regdomain __rcu *cfg80211_regdomain; 100734366deSJohannes Berg 101fb1fc7adSLuis R. Rodriguez /* 102abc7381bSLuis R. Rodriguez * Protects static reg.c components: 103458f4f9eSJohannes Berg * - cfg80211_regdomain (if not used with RCU) 104abc7381bSLuis R. Rodriguez * - cfg80211_world_regdom 105abc7381bSLuis R. Rodriguez * - last_request 10657b5ce07SLuis R. Rodriguez * - reg_num_devs_support_basehint 107abc7381bSLuis R. Rodriguez */ 108670b7f11SJohn W. Linville static DEFINE_MUTEX(reg_mutex); 10946a5ebafSJohannes Berg 11057b5ce07SLuis R. Rodriguez /* 11157b5ce07SLuis R. Rodriguez * Number of devices that registered to the core 11257b5ce07SLuis R. Rodriguez * that support cellular base station regulatory hints 11357b5ce07SLuis R. Rodriguez */ 11457b5ce07SLuis R. Rodriguez static int reg_num_devs_support_basehint; 11557b5ce07SLuis R. Rodriguez 11646a5ebafSJohannes Berg static inline void assert_reg_lock(void) 11746a5ebafSJohannes Berg { 11846a5ebafSJohannes Berg lockdep_assert_held(®_mutex); 11946a5ebafSJohannes Berg } 120abc7381bSLuis R. Rodriguez 121458f4f9eSJohannes Berg static const struct ieee80211_regdomain *get_cfg80211_regdom(void) 122458f4f9eSJohannes Berg { 123458f4f9eSJohannes Berg return rcu_dereference_protected(cfg80211_regdomain, 124458f4f9eSJohannes Berg lockdep_is_held(®_mutex)); 125458f4f9eSJohannes Berg } 126458f4f9eSJohannes Berg 127458f4f9eSJohannes Berg static const struct ieee80211_regdomain *get_wiphy_regdom(struct wiphy *wiphy) 128458f4f9eSJohannes Berg { 129458f4f9eSJohannes Berg return rcu_dereference_protected(wiphy->regd, 130458f4f9eSJohannes Berg lockdep_is_held(®_mutex)); 131458f4f9eSJohannes Berg } 132458f4f9eSJohannes Berg 133458f4f9eSJohannes Berg static void rcu_free_regdom(const struct ieee80211_regdomain *r) 134458f4f9eSJohannes Berg { 135458f4f9eSJohannes Berg if (!r) 136458f4f9eSJohannes Berg return; 137458f4f9eSJohannes Berg kfree_rcu((struct ieee80211_regdomain *)r, rcu_head); 138458f4f9eSJohannes Berg } 139458f4f9eSJohannes Berg 140e38f8a7aSLuis R. Rodriguez /* Used to queue up regulatory hints */ 141fe33eb39SLuis R. Rodriguez static LIST_HEAD(reg_requests_list); 142fe33eb39SLuis R. Rodriguez static spinlock_t reg_requests_lock; 143fe33eb39SLuis R. Rodriguez 144e38f8a7aSLuis R. Rodriguez /* Used to queue up beacon hints for review */ 145e38f8a7aSLuis R. Rodriguez static LIST_HEAD(reg_pending_beacons); 146e38f8a7aSLuis R. Rodriguez static spinlock_t reg_pending_beacons_lock; 147e38f8a7aSLuis R. Rodriguez 148e38f8a7aSLuis R. Rodriguez /* Used to keep track of processed beacon hints */ 149e38f8a7aSLuis R. Rodriguez static LIST_HEAD(reg_beacon_list); 150e38f8a7aSLuis R. Rodriguez 151e38f8a7aSLuis R. Rodriguez struct reg_beacon { 152e38f8a7aSLuis R. Rodriguez struct list_head list; 153e38f8a7aSLuis R. Rodriguez struct ieee80211_channel chan; 154e38f8a7aSLuis R. Rodriguez }; 155e38f8a7aSLuis R. Rodriguez 156f333a7a2SLuis R. Rodriguez static void reg_todo(struct work_struct *work); 157f333a7a2SLuis R. Rodriguez static DECLARE_WORK(reg_work, reg_todo); 158f333a7a2SLuis R. Rodriguez 159a90c7a31SLuis R. Rodriguez static void reg_timeout_work(struct work_struct *work); 160a90c7a31SLuis R. Rodriguez static DECLARE_DELAYED_WORK(reg_timeout, reg_timeout_work); 161a90c7a31SLuis R. Rodriguez 162734366deSJohannes Berg /* We keep a static world regulatory domain in case of the absence of CRDA */ 163734366deSJohannes Berg static const struct ieee80211_regdomain world_regdom = { 16490cdc6dfSVladimir Kondratiev .n_reg_rules = 6, 165734366deSJohannes Berg .alpha2 = "00", 166734366deSJohannes Berg .reg_rules = { 16768798a62SLuis R. Rodriguez /* IEEE 802.11b/g, channels 1..11 */ 16868798a62SLuis R. Rodriguez REG_RULE(2412-10, 2462+10, 40, 6, 20, 0), 16943c771a1SJohannes Berg /* IEEE 802.11b/g, channels 12..13. */ 17043c771a1SJohannes Berg REG_RULE(2467-10, 2472+10, 40, 6, 20, 171611b6a82SLuis R. Rodriguez NL80211_RRF_PASSIVE_SCAN | 172611b6a82SLuis R. Rodriguez NL80211_RRF_NO_IBSS), 173611b6a82SLuis R. Rodriguez /* IEEE 802.11 channel 14 - Only JP enables 174611b6a82SLuis R. Rodriguez * this and for 802.11b only */ 175611b6a82SLuis R. Rodriguez REG_RULE(2484-10, 2484+10, 20, 6, 20, 176611b6a82SLuis R. Rodriguez NL80211_RRF_PASSIVE_SCAN | 177611b6a82SLuis R. Rodriguez NL80211_RRF_NO_IBSS | 178611b6a82SLuis R. Rodriguez NL80211_RRF_NO_OFDM), 1793fc71f77SLuis R. Rodriguez /* IEEE 802.11a, channel 36..48 */ 180ec329aceSLuis R. Rodriguez REG_RULE(5180-10, 5240+10, 40, 6, 20, 1813fc71f77SLuis R. Rodriguez NL80211_RRF_PASSIVE_SCAN | 1823fc71f77SLuis R. Rodriguez NL80211_RRF_NO_IBSS), 1833fc71f77SLuis R. Rodriguez 1843fc71f77SLuis R. Rodriguez /* NB: 5260 MHz - 5700 MHz requies DFS */ 1853fc71f77SLuis R. Rodriguez 1863fc71f77SLuis R. Rodriguez /* IEEE 802.11a, channel 149..165 */ 187ec329aceSLuis R. Rodriguez REG_RULE(5745-10, 5825+10, 40, 6, 20, 1883fc71f77SLuis R. Rodriguez NL80211_RRF_PASSIVE_SCAN | 1893fc71f77SLuis R. Rodriguez NL80211_RRF_NO_IBSS), 19090cdc6dfSVladimir Kondratiev 19190cdc6dfSVladimir Kondratiev /* IEEE 802.11ad (60gHz), channels 1..3 */ 19290cdc6dfSVladimir Kondratiev REG_RULE(56160+2160*1-1080, 56160+2160*3+1080, 2160, 0, 0, 0), 193734366deSJohannes Berg } 194734366deSJohannes Berg }; 195734366deSJohannes Berg 196a3d2eaf0SJohannes Berg static const struct ieee80211_regdomain *cfg80211_world_regdom = 197a3d2eaf0SJohannes Berg &world_regdom; 198734366deSJohannes Berg 1996ee7d330SLuis R. Rodriguez static char *ieee80211_regdom = "00"; 20009d989d1SLuis R. Rodriguez static char user_alpha2[2]; 2016ee7d330SLuis R. Rodriguez 202734366deSJohannes Berg module_param(ieee80211_regdom, charp, 0444); 203734366deSJohannes Berg MODULE_PARM_DESC(ieee80211_regdom, "IEEE 802.11 regulatory domain code"); 204734366deSJohannes Berg 205379b82f4SJohannes Berg static void reset_regdomains(bool full_reset, 206379b82f4SJohannes Berg const struct ieee80211_regdomain *new_regdom) 207734366deSJohannes Berg { 208458f4f9eSJohannes Berg const struct ieee80211_regdomain *r; 209458f4f9eSJohannes Berg 210e8da2bb4SJohannes Berg assert_reg_lock(); 211e8da2bb4SJohannes Berg 212458f4f9eSJohannes Berg r = get_cfg80211_regdom(); 213458f4f9eSJohannes Berg 214942b25cfSJohannes Berg /* avoid freeing static information or freeing something twice */ 215458f4f9eSJohannes Berg if (r == cfg80211_world_regdom) 216458f4f9eSJohannes Berg r = NULL; 217942b25cfSJohannes Berg if (cfg80211_world_regdom == &world_regdom) 218942b25cfSJohannes Berg cfg80211_world_regdom = NULL; 219458f4f9eSJohannes Berg if (r == &world_regdom) 220458f4f9eSJohannes Berg r = NULL; 221942b25cfSJohannes Berg 222458f4f9eSJohannes Berg rcu_free_regdom(r); 223458f4f9eSJohannes Berg rcu_free_regdom(cfg80211_world_regdom); 224734366deSJohannes Berg 225a3d2eaf0SJohannes Berg cfg80211_world_regdom = &world_regdom; 226458f4f9eSJohannes Berg rcu_assign_pointer(cfg80211_regdomain, new_regdom); 227a042994dSLuis R. Rodriguez 228a042994dSLuis R. Rodriguez if (!full_reset) 229a042994dSLuis R. Rodriguez return; 230a042994dSLuis R. Rodriguez 231a042994dSLuis R. Rodriguez if (last_request != &core_request_world) 232a042994dSLuis R. Rodriguez kfree(last_request); 233a042994dSLuis R. Rodriguez last_request = &core_request_world; 234734366deSJohannes Berg } 235734366deSJohannes Berg 236fb1fc7adSLuis R. Rodriguez /* 237fb1fc7adSLuis R. Rodriguez * Dynamic world regulatory domain requested by the wireless 238fb1fc7adSLuis R. Rodriguez * core upon initialization 239fb1fc7adSLuis R. Rodriguez */ 240a3d2eaf0SJohannes Berg static void update_world_regdomain(const struct ieee80211_regdomain *rd) 241734366deSJohannes Berg { 242fdc9d7b2SJohannes Berg WARN_ON(!last_request); 243734366deSJohannes Berg 244e8da2bb4SJohannes Berg assert_reg_lock(); 245e8da2bb4SJohannes Berg 246379b82f4SJohannes Berg reset_regdomains(false, rd); 247734366deSJohannes Berg 248734366deSJohannes Berg cfg80211_world_regdom = rd; 249734366deSJohannes Berg } 250734366deSJohannes Berg 251a3d2eaf0SJohannes Berg bool is_world_regdom(const char *alpha2) 252b2e1b302SLuis R. Rodriguez { 253b2e1b302SLuis R. Rodriguez if (!alpha2) 254b2e1b302SLuis R. Rodriguez return false; 2551a919318SJohannes Berg return alpha2[0] == '0' && alpha2[1] == '0'; 256b2e1b302SLuis R. Rodriguez } 257b2e1b302SLuis R. Rodriguez 258a3d2eaf0SJohannes Berg static bool is_alpha2_set(const char *alpha2) 259b2e1b302SLuis R. Rodriguez { 260b2e1b302SLuis R. Rodriguez if (!alpha2) 261b2e1b302SLuis R. Rodriguez return false; 2621a919318SJohannes Berg return alpha2[0] && alpha2[1]; 263b2e1b302SLuis R. Rodriguez } 264b2e1b302SLuis R. Rodriguez 265a3d2eaf0SJohannes Berg static bool is_unknown_alpha2(const char *alpha2) 266b2e1b302SLuis R. Rodriguez { 267b2e1b302SLuis R. Rodriguez if (!alpha2) 268b2e1b302SLuis R. Rodriguez return false; 269fb1fc7adSLuis R. Rodriguez /* 270fb1fc7adSLuis R. Rodriguez * Special case where regulatory domain was built by driver 271fb1fc7adSLuis R. Rodriguez * but a specific alpha2 cannot be determined 272fb1fc7adSLuis R. Rodriguez */ 2731a919318SJohannes Berg return alpha2[0] == '9' && alpha2[1] == '9'; 274b2e1b302SLuis R. Rodriguez } 275b2e1b302SLuis R. Rodriguez 2763f2355cbSLuis R. Rodriguez static bool is_intersected_alpha2(const char *alpha2) 2773f2355cbSLuis R. Rodriguez { 2783f2355cbSLuis R. Rodriguez if (!alpha2) 2793f2355cbSLuis R. Rodriguez return false; 280fb1fc7adSLuis R. Rodriguez /* 281fb1fc7adSLuis R. Rodriguez * Special case where regulatory domain is the 2823f2355cbSLuis R. Rodriguez * result of an intersection between two regulatory domain 283fb1fc7adSLuis R. Rodriguez * structures 284fb1fc7adSLuis R. Rodriguez */ 2851a919318SJohannes Berg return alpha2[0] == '9' && alpha2[1] == '8'; 2863f2355cbSLuis R. Rodriguez } 2873f2355cbSLuis R. Rodriguez 288a3d2eaf0SJohannes Berg static bool is_an_alpha2(const char *alpha2) 289b2e1b302SLuis R. Rodriguez { 290b2e1b302SLuis R. Rodriguez if (!alpha2) 291b2e1b302SLuis R. Rodriguez return false; 2921a919318SJohannes Berg return isalpha(alpha2[0]) && isalpha(alpha2[1]); 293b2e1b302SLuis R. Rodriguez } 294b2e1b302SLuis R. Rodriguez 295a3d2eaf0SJohannes Berg static bool alpha2_equal(const char *alpha2_x, const char *alpha2_y) 296b2e1b302SLuis R. Rodriguez { 297b2e1b302SLuis R. Rodriguez if (!alpha2_x || !alpha2_y) 298b2e1b302SLuis R. Rodriguez return false; 2991a919318SJohannes Berg return alpha2_x[0] == alpha2_y[0] && alpha2_x[1] == alpha2_y[1]; 300b2e1b302SLuis R. Rodriguez } 301b2e1b302SLuis R. Rodriguez 30269b1572bSLuis R. Rodriguez static bool regdom_changes(const char *alpha2) 303b2e1b302SLuis R. Rodriguez { 304458f4f9eSJohannes Berg const struct ieee80211_regdomain *r = get_cfg80211_regdom(); 305761cf7ecSLuis R. Rodriguez 306458f4f9eSJohannes Berg if (!r) 307b2e1b302SLuis R. Rodriguez return true; 308458f4f9eSJohannes Berg return !alpha2_equal(r->alpha2, alpha2); 309b2e1b302SLuis R. Rodriguez } 310b2e1b302SLuis R. Rodriguez 31109d989d1SLuis R. Rodriguez /* 31209d989d1SLuis R. Rodriguez * The NL80211_REGDOM_SET_BY_USER regdom alpha2 is cached, this lets 31309d989d1SLuis R. Rodriguez * you know if a valid regulatory hint with NL80211_REGDOM_SET_BY_USER 31409d989d1SLuis R. Rodriguez * has ever been issued. 31509d989d1SLuis R. Rodriguez */ 31609d989d1SLuis R. Rodriguez static bool is_user_regdom_saved(void) 31709d989d1SLuis R. Rodriguez { 31809d989d1SLuis R. Rodriguez if (user_alpha2[0] == '9' && user_alpha2[1] == '7') 31909d989d1SLuis R. Rodriguez return false; 32009d989d1SLuis R. Rodriguez 32109d989d1SLuis R. Rodriguez /* This would indicate a mistake on the design */ 3221a919318SJohannes Berg if (WARN(!is_world_regdom(user_alpha2) && !is_an_alpha2(user_alpha2), 32309d989d1SLuis R. Rodriguez "Unexpected user alpha2: %c%c\n", 3241a919318SJohannes Berg user_alpha2[0], user_alpha2[1])) 32509d989d1SLuis R. Rodriguez return false; 32609d989d1SLuis R. Rodriguez 32709d989d1SLuis R. Rodriguez return true; 32809d989d1SLuis R. Rodriguez } 32909d989d1SLuis R. Rodriguez 330e9763c3cSJohannes Berg static const struct ieee80211_regdomain * 331e9763c3cSJohannes Berg reg_copy_regd(const struct ieee80211_regdomain *src_regd) 3323b377ea9SJohn W. Linville { 3333b377ea9SJohn W. Linville struct ieee80211_regdomain *regd; 334e9763c3cSJohannes Berg int size_of_regd; 3353b377ea9SJohn W. Linville unsigned int i; 3363b377ea9SJohn W. Linville 33782f20856SJohannes Berg size_of_regd = 33882f20856SJohannes Berg sizeof(struct ieee80211_regdomain) + 33982f20856SJohannes Berg src_regd->n_reg_rules * sizeof(struct ieee80211_reg_rule); 3403b377ea9SJohn W. Linville 3413b377ea9SJohn W. Linville regd = kzalloc(size_of_regd, GFP_KERNEL); 3423b377ea9SJohn W. Linville if (!regd) 343e9763c3cSJohannes Berg return ERR_PTR(-ENOMEM); 3443b377ea9SJohn W. Linville 3453b377ea9SJohn W. Linville memcpy(regd, src_regd, sizeof(struct ieee80211_regdomain)); 3463b377ea9SJohn W. Linville 3473b377ea9SJohn W. Linville for (i = 0; i < src_regd->n_reg_rules; i++) 3483b377ea9SJohn W. Linville memcpy(®d->reg_rules[i], &src_regd->reg_rules[i], 3493b377ea9SJohn W. Linville sizeof(struct ieee80211_reg_rule)); 3503b377ea9SJohn W. Linville 351e9763c3cSJohannes Berg return regd; 3523b377ea9SJohn W. Linville } 3533b377ea9SJohn W. Linville 3543b377ea9SJohn W. Linville #ifdef CONFIG_CFG80211_INTERNAL_REGDB 3553b377ea9SJohn W. Linville struct reg_regdb_search_request { 3563b377ea9SJohn W. Linville char alpha2[2]; 3573b377ea9SJohn W. Linville struct list_head list; 3583b377ea9SJohn W. Linville }; 3593b377ea9SJohn W. Linville 3603b377ea9SJohn W. Linville static LIST_HEAD(reg_regdb_search_list); 361368d06f5SJohn W. Linville static DEFINE_MUTEX(reg_regdb_search_mutex); 3623b377ea9SJohn W. Linville 3633b377ea9SJohn W. Linville static void reg_regdb_search(struct work_struct *work) 3643b377ea9SJohn W. Linville { 3653b377ea9SJohn W. Linville struct reg_regdb_search_request *request; 366e9763c3cSJohannes Berg const struct ieee80211_regdomain *curdom, *regdom = NULL; 367e9763c3cSJohannes Berg int i; 368a85d0d7fSLuis R. Rodriguez 369a85d0d7fSLuis R. Rodriguez mutex_lock(&cfg80211_mutex); 3703b377ea9SJohn W. Linville 371368d06f5SJohn W. Linville mutex_lock(®_regdb_search_mutex); 3723b377ea9SJohn W. Linville while (!list_empty(®_regdb_search_list)) { 3733b377ea9SJohn W. Linville request = list_first_entry(®_regdb_search_list, 3743b377ea9SJohn W. Linville struct reg_regdb_search_request, 3753b377ea9SJohn W. Linville list); 3763b377ea9SJohn W. Linville list_del(&request->list); 3773b377ea9SJohn W. Linville 3783b377ea9SJohn W. Linville for (i = 0; i < reg_regdb_size; i++) { 3793b377ea9SJohn W. Linville curdom = reg_regdb[i]; 3803b377ea9SJohn W. Linville 3811a919318SJohannes Berg if (alpha2_equal(request->alpha2, curdom->alpha2)) { 382e9763c3cSJohannes Berg regdom = reg_copy_regd(curdom); 3833b377ea9SJohn W. Linville break; 3843b377ea9SJohn W. Linville } 3853b377ea9SJohn W. Linville } 3863b377ea9SJohn W. Linville 3873b377ea9SJohn W. Linville kfree(request); 3883b377ea9SJohn W. Linville } 389368d06f5SJohn W. Linville mutex_unlock(®_regdb_search_mutex); 390a85d0d7fSLuis R. Rodriguez 391e9763c3cSJohannes Berg if (!IS_ERR_OR_NULL(regdom)) 392a85d0d7fSLuis R. Rodriguez set_regdom(regdom); 393a85d0d7fSLuis R. Rodriguez 394a85d0d7fSLuis R. Rodriguez mutex_unlock(&cfg80211_mutex); 3953b377ea9SJohn W. Linville } 3963b377ea9SJohn W. Linville 3973b377ea9SJohn W. Linville static DECLARE_WORK(reg_regdb_work, reg_regdb_search); 3983b377ea9SJohn W. Linville 3993b377ea9SJohn W. Linville static void reg_regdb_query(const char *alpha2) 4003b377ea9SJohn W. Linville { 4013b377ea9SJohn W. Linville struct reg_regdb_search_request *request; 4023b377ea9SJohn W. Linville 4033b377ea9SJohn W. Linville if (!alpha2) 4043b377ea9SJohn W. Linville return; 4053b377ea9SJohn W. Linville 4063b377ea9SJohn W. Linville request = kzalloc(sizeof(struct reg_regdb_search_request), GFP_KERNEL); 4073b377ea9SJohn W. Linville if (!request) 4083b377ea9SJohn W. Linville return; 4093b377ea9SJohn W. Linville 4103b377ea9SJohn W. Linville memcpy(request->alpha2, alpha2, 2); 4113b377ea9SJohn W. Linville 412368d06f5SJohn W. Linville mutex_lock(®_regdb_search_mutex); 4133b377ea9SJohn W. Linville list_add_tail(&request->list, ®_regdb_search_list); 414368d06f5SJohn W. Linville mutex_unlock(®_regdb_search_mutex); 4153b377ea9SJohn W. Linville 4163b377ea9SJohn W. Linville schedule_work(®_regdb_work); 4173b377ea9SJohn W. Linville } 41880007efeSLuis R. Rodriguez 41980007efeSLuis R. Rodriguez /* Feel free to add any other sanity checks here */ 42080007efeSLuis R. Rodriguez static void reg_regdb_size_check(void) 42180007efeSLuis R. Rodriguez { 42280007efeSLuis R. Rodriguez /* We should ideally BUILD_BUG_ON() but then random builds would fail */ 42380007efeSLuis R. Rodriguez WARN_ONCE(!reg_regdb_size, "db.txt is empty, you should update it..."); 42480007efeSLuis R. Rodriguez } 4253b377ea9SJohn W. Linville #else 42680007efeSLuis R. Rodriguez static inline void reg_regdb_size_check(void) {} 4273b377ea9SJohn W. Linville static inline void reg_regdb_query(const char *alpha2) {} 4283b377ea9SJohn W. Linville #endif /* CONFIG_CFG80211_INTERNAL_REGDB */ 4293b377ea9SJohn W. Linville 430fb1fc7adSLuis R. Rodriguez /* 431fb1fc7adSLuis R. Rodriguez * This lets us keep regulatory code which is updated on a regulatory 4324d9d88d1SScott James Remnant * basis in userspace. Country information is filled in by 4334d9d88d1SScott James Remnant * reg_device_uevent 434fb1fc7adSLuis R. Rodriguez */ 435b2e1b302SLuis R. Rodriguez static int call_crda(const char *alpha2) 436b2e1b302SLuis R. Rodriguez { 437b2e1b302SLuis R. Rodriguez if (!is_world_regdom((char *) alpha2)) 438e9c0268fSJoe Perches pr_info("Calling CRDA for country: %c%c\n", 439b2e1b302SLuis R. Rodriguez alpha2[0], alpha2[1]); 440b2e1b302SLuis R. Rodriguez else 441e9c0268fSJoe Perches pr_info("Calling CRDA to update world regulatory domain\n"); 4428318d78aSJohannes Berg 4433b377ea9SJohn W. Linville /* query internal regulatory database (if it exists) */ 4443b377ea9SJohn W. Linville reg_regdb_query(alpha2); 4453b377ea9SJohn W. Linville 4464d9d88d1SScott James Remnant return kobject_uevent(®_pdev->dev.kobj, KOBJ_CHANGE); 447b2e1b302SLuis R. Rodriguez } 448b2e1b302SLuis R. Rodriguez 4496913b49aSJohannes Berg static bool reg_is_valid_request(const char *alpha2) 450b2e1b302SLuis R. Rodriguez { 4516913b49aSJohannes Berg assert_reg_lock(); 4526913b49aSJohannes Berg 453f6037d09SJohannes Berg if (!last_request) 454f6037d09SJohannes Berg return false; 455f6037d09SJohannes Berg 4566913b49aSJohannes Berg if (last_request->processed) 4576913b49aSJohannes Berg return false; 4586913b49aSJohannes Berg 459f6037d09SJohannes Berg return alpha2_equal(last_request->alpha2, alpha2); 460b2e1b302SLuis R. Rodriguez } 461b2e1b302SLuis R. Rodriguez 462b2e1b302SLuis R. Rodriguez /* Sanity check on a regulatory rule */ 463a3d2eaf0SJohannes Berg static bool is_valid_reg_rule(const struct ieee80211_reg_rule *rule) 464b2e1b302SLuis R. Rodriguez { 465a3d2eaf0SJohannes Berg const struct ieee80211_freq_range *freq_range = &rule->freq_range; 466b2e1b302SLuis R. Rodriguez u32 freq_diff; 467b2e1b302SLuis R. Rodriguez 46891e99004SLuis R. Rodriguez if (freq_range->start_freq_khz <= 0 || freq_range->end_freq_khz <= 0) 469b2e1b302SLuis R. Rodriguez return false; 470b2e1b302SLuis R. Rodriguez 471b2e1b302SLuis R. Rodriguez if (freq_range->start_freq_khz > freq_range->end_freq_khz) 472b2e1b302SLuis R. Rodriguez return false; 473b2e1b302SLuis R. Rodriguez 474b2e1b302SLuis R. Rodriguez freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz; 475b2e1b302SLuis R. Rodriguez 476bd05f28eSRoel Kluin if (freq_range->end_freq_khz <= freq_range->start_freq_khz || 477bd05f28eSRoel Kluin freq_range->max_bandwidth_khz > freq_diff) 478b2e1b302SLuis R. Rodriguez return false; 479b2e1b302SLuis R. Rodriguez 480b2e1b302SLuis R. Rodriguez return true; 481b2e1b302SLuis R. Rodriguez } 482b2e1b302SLuis R. Rodriguez 483a3d2eaf0SJohannes Berg static bool is_valid_rd(const struct ieee80211_regdomain *rd) 484b2e1b302SLuis R. Rodriguez { 485a3d2eaf0SJohannes Berg const struct ieee80211_reg_rule *reg_rule = NULL; 486b2e1b302SLuis R. Rodriguez unsigned int i; 487b2e1b302SLuis R. Rodriguez 488b2e1b302SLuis R. Rodriguez if (!rd->n_reg_rules) 489b2e1b302SLuis R. Rodriguez return false; 490b2e1b302SLuis R. Rodriguez 49188dc1c3fSLuis R. Rodriguez if (WARN_ON(rd->n_reg_rules > NL80211_MAX_SUPP_REG_RULES)) 49288dc1c3fSLuis R. Rodriguez return false; 49388dc1c3fSLuis R. Rodriguez 494b2e1b302SLuis R. Rodriguez for (i = 0; i < rd->n_reg_rules; i++) { 495b2e1b302SLuis R. Rodriguez reg_rule = &rd->reg_rules[i]; 496b2e1b302SLuis R. Rodriguez if (!is_valid_reg_rule(reg_rule)) 497b2e1b302SLuis R. Rodriguez return false; 498b2e1b302SLuis R. Rodriguez } 499b2e1b302SLuis R. Rodriguez 500b2e1b302SLuis R. Rodriguez return true; 501b2e1b302SLuis R. Rodriguez } 502b2e1b302SLuis R. Rodriguez 503038659e7SLuis R. Rodriguez static bool reg_does_bw_fit(const struct ieee80211_freq_range *freq_range, 504fe7ef5e9SJohannes Berg u32 center_freq_khz, u32 bw_khz) 505b2e1b302SLuis R. Rodriguez { 506038659e7SLuis R. Rodriguez u32 start_freq_khz, end_freq_khz; 507038659e7SLuis R. Rodriguez 508038659e7SLuis R. Rodriguez start_freq_khz = center_freq_khz - (bw_khz/2); 509038659e7SLuis R. Rodriguez end_freq_khz = center_freq_khz + (bw_khz/2); 510038659e7SLuis R. Rodriguez 511b2e1b302SLuis R. Rodriguez if (start_freq_khz >= freq_range->start_freq_khz && 512b2e1b302SLuis R. Rodriguez end_freq_khz <= freq_range->end_freq_khz) 513038659e7SLuis R. Rodriguez return true; 514038659e7SLuis R. Rodriguez 515038659e7SLuis R. Rodriguez return false; 516b2e1b302SLuis R. Rodriguez } 517b2e1b302SLuis R. Rodriguez 5180c7dc45dSLuis R. Rodriguez /** 5190c7dc45dSLuis R. Rodriguez * freq_in_rule_band - tells us if a frequency is in a frequency band 5200c7dc45dSLuis R. Rodriguez * @freq_range: frequency rule we want to query 5210c7dc45dSLuis R. Rodriguez * @freq_khz: frequency we are inquiring about 5220c7dc45dSLuis R. Rodriguez * 5230c7dc45dSLuis R. Rodriguez * This lets us know if a specific frequency rule is or is not relevant to 5240c7dc45dSLuis R. Rodriguez * a specific frequency's band. Bands are device specific and artificial 52564629b9dSVladimir Kondratiev * definitions (the "2.4 GHz band", the "5 GHz band" and the "60GHz band"), 52664629b9dSVladimir Kondratiev * however it is safe for now to assume that a frequency rule should not be 52764629b9dSVladimir Kondratiev * part of a frequency's band if the start freq or end freq are off by more 52864629b9dSVladimir Kondratiev * than 2 GHz for the 2.4 and 5 GHz bands, and by more than 10 GHz for the 52964629b9dSVladimir Kondratiev * 60 GHz band. 5300c7dc45dSLuis R. Rodriguez * This resolution can be lowered and should be considered as we add 5310c7dc45dSLuis R. Rodriguez * regulatory rule support for other "bands". 5320c7dc45dSLuis R. Rodriguez **/ 5330c7dc45dSLuis R. Rodriguez static bool freq_in_rule_band(const struct ieee80211_freq_range *freq_range, 5340c7dc45dSLuis R. Rodriguez u32 freq_khz) 5350c7dc45dSLuis R. Rodriguez { 5360c7dc45dSLuis R. Rodriguez #define ONE_GHZ_IN_KHZ 1000000 53764629b9dSVladimir Kondratiev /* 53864629b9dSVladimir Kondratiev * From 802.11ad: directional multi-gigabit (DMG): 53964629b9dSVladimir Kondratiev * Pertaining to operation in a frequency band containing a channel 54064629b9dSVladimir Kondratiev * with the Channel starting frequency above 45 GHz. 54164629b9dSVladimir Kondratiev */ 54264629b9dSVladimir Kondratiev u32 limit = freq_khz > 45 * ONE_GHZ_IN_KHZ ? 54364629b9dSVladimir Kondratiev 10 * ONE_GHZ_IN_KHZ : 2 * ONE_GHZ_IN_KHZ; 54464629b9dSVladimir Kondratiev if (abs(freq_khz - freq_range->start_freq_khz) <= limit) 5450c7dc45dSLuis R. Rodriguez return true; 54664629b9dSVladimir Kondratiev if (abs(freq_khz - freq_range->end_freq_khz) <= limit) 5470c7dc45dSLuis R. Rodriguez return true; 5480c7dc45dSLuis R. Rodriguez return false; 5490c7dc45dSLuis R. Rodriguez #undef ONE_GHZ_IN_KHZ 5500c7dc45dSLuis R. Rodriguez } 5510c7dc45dSLuis R. Rodriguez 552fb1fc7adSLuis R. Rodriguez /* 553fb1fc7adSLuis R. Rodriguez * Helper for regdom_intersect(), this does the real 554fb1fc7adSLuis R. Rodriguez * mathematical intersection fun 555fb1fc7adSLuis R. Rodriguez */ 5561a919318SJohannes Berg static int reg_rules_intersect(const struct ieee80211_reg_rule *rule1, 5579c96477dSLuis R. Rodriguez const struct ieee80211_reg_rule *rule2, 5589c96477dSLuis R. Rodriguez struct ieee80211_reg_rule *intersected_rule) 5599c96477dSLuis R. Rodriguez { 5609c96477dSLuis R. Rodriguez const struct ieee80211_freq_range *freq_range1, *freq_range2; 5619c96477dSLuis R. Rodriguez struct ieee80211_freq_range *freq_range; 5629c96477dSLuis R. Rodriguez const struct ieee80211_power_rule *power_rule1, *power_rule2; 5639c96477dSLuis R. Rodriguez struct ieee80211_power_rule *power_rule; 5649c96477dSLuis R. Rodriguez u32 freq_diff; 5659c96477dSLuis R. Rodriguez 5669c96477dSLuis R. Rodriguez freq_range1 = &rule1->freq_range; 5679c96477dSLuis R. Rodriguez freq_range2 = &rule2->freq_range; 5689c96477dSLuis R. Rodriguez freq_range = &intersected_rule->freq_range; 5699c96477dSLuis R. Rodriguez 5709c96477dSLuis R. Rodriguez power_rule1 = &rule1->power_rule; 5719c96477dSLuis R. Rodriguez power_rule2 = &rule2->power_rule; 5729c96477dSLuis R. Rodriguez power_rule = &intersected_rule->power_rule; 5739c96477dSLuis R. Rodriguez 5749c96477dSLuis R. Rodriguez freq_range->start_freq_khz = max(freq_range1->start_freq_khz, 5759c96477dSLuis R. Rodriguez freq_range2->start_freq_khz); 5769c96477dSLuis R. Rodriguez freq_range->end_freq_khz = min(freq_range1->end_freq_khz, 5779c96477dSLuis R. Rodriguez freq_range2->end_freq_khz); 5789c96477dSLuis R. Rodriguez freq_range->max_bandwidth_khz = min(freq_range1->max_bandwidth_khz, 5799c96477dSLuis R. Rodriguez freq_range2->max_bandwidth_khz); 5809c96477dSLuis R. Rodriguez 5819c96477dSLuis R. Rodriguez freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz; 5829c96477dSLuis R. Rodriguez if (freq_range->max_bandwidth_khz > freq_diff) 5839c96477dSLuis R. Rodriguez freq_range->max_bandwidth_khz = freq_diff; 5849c96477dSLuis R. Rodriguez 5859c96477dSLuis R. Rodriguez power_rule->max_eirp = min(power_rule1->max_eirp, 5869c96477dSLuis R. Rodriguez power_rule2->max_eirp); 5879c96477dSLuis R. Rodriguez power_rule->max_antenna_gain = min(power_rule1->max_antenna_gain, 5889c96477dSLuis R. Rodriguez power_rule2->max_antenna_gain); 5899c96477dSLuis R. Rodriguez 5901a919318SJohannes Berg intersected_rule->flags = rule1->flags | rule2->flags; 5919c96477dSLuis R. Rodriguez 5929c96477dSLuis R. Rodriguez if (!is_valid_reg_rule(intersected_rule)) 5939c96477dSLuis R. Rodriguez return -EINVAL; 5949c96477dSLuis R. Rodriguez 5959c96477dSLuis R. Rodriguez return 0; 5969c96477dSLuis R. Rodriguez } 5979c96477dSLuis R. Rodriguez 5989c96477dSLuis R. Rodriguez /** 5999c96477dSLuis R. Rodriguez * regdom_intersect - do the intersection between two regulatory domains 6009c96477dSLuis R. Rodriguez * @rd1: first regulatory domain 6019c96477dSLuis R. Rodriguez * @rd2: second regulatory domain 6029c96477dSLuis R. Rodriguez * 6039c96477dSLuis R. Rodriguez * Use this function to get the intersection between two regulatory domains. 6049c96477dSLuis R. Rodriguez * Once completed we will mark the alpha2 for the rd as intersected, "98", 6059c96477dSLuis R. Rodriguez * as no one single alpha2 can represent this regulatory domain. 6069c96477dSLuis R. Rodriguez * 6079c96477dSLuis R. Rodriguez * Returns a pointer to the regulatory domain structure which will hold the 6089c96477dSLuis R. Rodriguez * resulting intersection of rules between rd1 and rd2. We will 6099c96477dSLuis R. Rodriguez * kzalloc() this structure for you. 6109c96477dSLuis R. Rodriguez */ 6111a919318SJohannes Berg static struct ieee80211_regdomain * 6121a919318SJohannes Berg regdom_intersect(const struct ieee80211_regdomain *rd1, 6139c96477dSLuis R. Rodriguez const struct ieee80211_regdomain *rd2) 6149c96477dSLuis R. Rodriguez { 6159c96477dSLuis R. Rodriguez int r, size_of_regd; 6169c96477dSLuis R. Rodriguez unsigned int x, y; 6179c96477dSLuis R. Rodriguez unsigned int num_rules = 0, rule_idx = 0; 6189c96477dSLuis R. Rodriguez const struct ieee80211_reg_rule *rule1, *rule2; 6199c96477dSLuis R. Rodriguez struct ieee80211_reg_rule *intersected_rule; 6209c96477dSLuis R. Rodriguez struct ieee80211_regdomain *rd; 6219c96477dSLuis R. Rodriguez /* This is just a dummy holder to help us count */ 62274f53cd8SJohannes Berg struct ieee80211_reg_rule dummy_rule; 6239c96477dSLuis R. Rodriguez 6249c96477dSLuis R. Rodriguez if (!rd1 || !rd2) 6259c96477dSLuis R. Rodriguez return NULL; 6269c96477dSLuis R. Rodriguez 627fb1fc7adSLuis R. Rodriguez /* 628fb1fc7adSLuis R. Rodriguez * First we get a count of the rules we'll need, then we actually 6299c96477dSLuis R. Rodriguez * build them. This is to so we can malloc() and free() a 6309c96477dSLuis R. Rodriguez * regdomain once. The reason we use reg_rules_intersect() here 6319c96477dSLuis R. Rodriguez * is it will return -EINVAL if the rule computed makes no sense. 632fb1fc7adSLuis R. Rodriguez * All rules that do check out OK are valid. 633fb1fc7adSLuis R. Rodriguez */ 6349c96477dSLuis R. Rodriguez 6359c96477dSLuis R. Rodriguez for (x = 0; x < rd1->n_reg_rules; x++) { 6369c96477dSLuis R. Rodriguez rule1 = &rd1->reg_rules[x]; 6379c96477dSLuis R. Rodriguez for (y = 0; y < rd2->n_reg_rules; y++) { 6389c96477dSLuis R. Rodriguez rule2 = &rd2->reg_rules[y]; 63974f53cd8SJohannes Berg if (!reg_rules_intersect(rule1, rule2, &dummy_rule)) 6409c96477dSLuis R. Rodriguez num_rules++; 6419c96477dSLuis R. Rodriguez } 6429c96477dSLuis R. Rodriguez } 6439c96477dSLuis R. Rodriguez 6449c96477dSLuis R. Rodriguez if (!num_rules) 6459c96477dSLuis R. Rodriguez return NULL; 6469c96477dSLuis R. Rodriguez 6479c96477dSLuis R. Rodriguez size_of_regd = sizeof(struct ieee80211_regdomain) + 64882f20856SJohannes Berg num_rules * sizeof(struct ieee80211_reg_rule); 6499c96477dSLuis R. Rodriguez 6509c96477dSLuis R. Rodriguez rd = kzalloc(size_of_regd, GFP_KERNEL); 6519c96477dSLuis R. Rodriguez if (!rd) 6529c96477dSLuis R. Rodriguez return NULL; 6539c96477dSLuis R. Rodriguez 6548a57fff0SJohannes Berg for (x = 0; x < rd1->n_reg_rules && rule_idx < num_rules; x++) { 6559c96477dSLuis R. Rodriguez rule1 = &rd1->reg_rules[x]; 6568a57fff0SJohannes Berg for (y = 0; y < rd2->n_reg_rules && rule_idx < num_rules; y++) { 6579c96477dSLuis R. Rodriguez rule2 = &rd2->reg_rules[y]; 658fb1fc7adSLuis R. Rodriguez /* 659fb1fc7adSLuis R. Rodriguez * This time around instead of using the stack lets 6609c96477dSLuis R. Rodriguez * write to the target rule directly saving ourselves 661fb1fc7adSLuis R. Rodriguez * a memcpy() 662fb1fc7adSLuis R. Rodriguez */ 6639c96477dSLuis R. Rodriguez intersected_rule = &rd->reg_rules[rule_idx]; 6641a919318SJohannes Berg r = reg_rules_intersect(rule1, rule2, intersected_rule); 665fb1fc7adSLuis R. Rodriguez /* 666fb1fc7adSLuis R. Rodriguez * No need to memset here the intersected rule here as 667fb1fc7adSLuis R. Rodriguez * we're not using the stack anymore 668fb1fc7adSLuis R. Rodriguez */ 6699c96477dSLuis R. Rodriguez if (r) 6709c96477dSLuis R. Rodriguez continue; 6719c96477dSLuis R. Rodriguez rule_idx++; 6729c96477dSLuis R. Rodriguez } 6739c96477dSLuis R. Rodriguez } 6749c96477dSLuis R. Rodriguez 6759c96477dSLuis R. Rodriguez if (rule_idx != num_rules) { 6769c96477dSLuis R. Rodriguez kfree(rd); 6779c96477dSLuis R. Rodriguez return NULL; 6789c96477dSLuis R. Rodriguez } 6799c96477dSLuis R. Rodriguez 6809c96477dSLuis R. Rodriguez rd->n_reg_rules = num_rules; 6819c96477dSLuis R. Rodriguez rd->alpha2[0] = '9'; 6829c96477dSLuis R. Rodriguez rd->alpha2[1] = '8'; 6839c96477dSLuis R. Rodriguez 6849c96477dSLuis R. Rodriguez return rd; 6859c96477dSLuis R. Rodriguez } 6869c96477dSLuis R. Rodriguez 687fb1fc7adSLuis R. Rodriguez /* 688fb1fc7adSLuis R. Rodriguez * XXX: add support for the rest of enum nl80211_reg_rule_flags, we may 689fb1fc7adSLuis R. Rodriguez * want to just have the channel structure use these 690fb1fc7adSLuis R. Rodriguez */ 691b2e1b302SLuis R. Rodriguez static u32 map_regdom_flags(u32 rd_flags) 692b2e1b302SLuis R. Rodriguez { 693b2e1b302SLuis R. Rodriguez u32 channel_flags = 0; 694b2e1b302SLuis R. Rodriguez if (rd_flags & NL80211_RRF_PASSIVE_SCAN) 695b2e1b302SLuis R. Rodriguez channel_flags |= IEEE80211_CHAN_PASSIVE_SCAN; 696b2e1b302SLuis R. Rodriguez if (rd_flags & NL80211_RRF_NO_IBSS) 697b2e1b302SLuis R. Rodriguez channel_flags |= IEEE80211_CHAN_NO_IBSS; 698b2e1b302SLuis R. Rodriguez if (rd_flags & NL80211_RRF_DFS) 699b2e1b302SLuis R. Rodriguez channel_flags |= IEEE80211_CHAN_RADAR; 70003f6b084SSeth Forshee if (rd_flags & NL80211_RRF_NO_OFDM) 70103f6b084SSeth Forshee channel_flags |= IEEE80211_CHAN_NO_OFDM; 702b2e1b302SLuis R. Rodriguez return channel_flags; 703b2e1b302SLuis R. Rodriguez } 704b2e1b302SLuis R. Rodriguez 705fe7ef5e9SJohannes Berg static int freq_reg_info_regd(struct wiphy *wiphy, u32 center_freq, 7061fa25e41SLuis R. Rodriguez const struct ieee80211_reg_rule **reg_rule, 7075d885b99SJohannes Berg const struct ieee80211_regdomain *regd) 7088318d78aSJohannes Berg { 7098318d78aSJohannes Berg int i; 7100c7dc45dSLuis R. Rodriguez bool band_rule_found = false; 711038659e7SLuis R. Rodriguez bool bw_fits = false; 712038659e7SLuis R. Rodriguez 7133e0c3ff3SLuis R. Rodriguez if (!regd) 714b2e1b302SLuis R. Rodriguez return -EINVAL; 715b2e1b302SLuis R. Rodriguez 7163e0c3ff3SLuis R. Rodriguez for (i = 0; i < regd->n_reg_rules; i++) { 717b2e1b302SLuis R. Rodriguez const struct ieee80211_reg_rule *rr; 718b2e1b302SLuis R. Rodriguez const struct ieee80211_freq_range *fr = NULL; 719b2e1b302SLuis R. Rodriguez 7203e0c3ff3SLuis R. Rodriguez rr = ®d->reg_rules[i]; 721b2e1b302SLuis R. Rodriguez fr = &rr->freq_range; 7220c7dc45dSLuis R. Rodriguez 723fb1fc7adSLuis R. Rodriguez /* 724fb1fc7adSLuis R. Rodriguez * We only need to know if one frequency rule was 7250c7dc45dSLuis R. Rodriguez * was in center_freq's band, that's enough, so lets 726fb1fc7adSLuis R. Rodriguez * not overwrite it once found 727fb1fc7adSLuis R. Rodriguez */ 7280c7dc45dSLuis R. Rodriguez if (!band_rule_found) 7290c7dc45dSLuis R. Rodriguez band_rule_found = freq_in_rule_band(fr, center_freq); 7300c7dc45dSLuis R. Rodriguez 731fe7ef5e9SJohannes Berg bw_fits = reg_does_bw_fit(fr, center_freq, MHZ_TO_KHZ(20)); 7320c7dc45dSLuis R. Rodriguez 733038659e7SLuis R. Rodriguez if (band_rule_found && bw_fits) { 734b2e1b302SLuis R. Rodriguez *reg_rule = rr; 735038659e7SLuis R. Rodriguez return 0; 7368318d78aSJohannes Berg } 7378318d78aSJohannes Berg } 7388318d78aSJohannes Berg 7390c7dc45dSLuis R. Rodriguez if (!band_rule_found) 7400c7dc45dSLuis R. Rodriguez return -ERANGE; 7410c7dc45dSLuis R. Rodriguez 742038659e7SLuis R. Rodriguez return -EINVAL; 743b2e1b302SLuis R. Rodriguez } 744b2e1b302SLuis R. Rodriguez 745fe7ef5e9SJohannes Berg int freq_reg_info(struct wiphy *wiphy, u32 center_freq, 7461fa25e41SLuis R. Rodriguez const struct ieee80211_reg_rule **reg_rule) 7471fa25e41SLuis R. Rodriguez { 7485d885b99SJohannes Berg const struct ieee80211_regdomain *regd; 7495d885b99SJohannes Berg 7505d885b99SJohannes Berg assert_reg_lock(); 7511a919318SJohannes Berg 7525d885b99SJohannes Berg /* 7535d885b99SJohannes Berg * Follow the driver's regulatory domain, if present, unless a country 7545d885b99SJohannes Berg * IE has been processed or a user wants to help complaince further 7555d885b99SJohannes Berg */ 7565d885b99SJohannes Berg if (last_request->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && 7575d885b99SJohannes Berg last_request->initiator != NL80211_REGDOM_SET_BY_USER && 7585d885b99SJohannes Berg wiphy->regd) 759458f4f9eSJohannes Berg regd = get_wiphy_regdom(wiphy); 7605d885b99SJohannes Berg else 761458f4f9eSJohannes Berg regd = get_cfg80211_regdom(); 7625d885b99SJohannes Berg 763fe7ef5e9SJohannes Berg return freq_reg_info_regd(wiphy, center_freq, reg_rule, regd); 7641fa25e41SLuis R. Rodriguez } 7654f366c5dSJohn W. Linville EXPORT_SYMBOL(freq_reg_info); 766b2e1b302SLuis R. Rodriguez 767926a0a09SLuis R. Rodriguez #ifdef CONFIG_CFG80211_REG_DEBUG 768926a0a09SLuis R. Rodriguez static const char *reg_initiator_name(enum nl80211_reg_initiator initiator) 769926a0a09SLuis R. Rodriguez { 770926a0a09SLuis R. Rodriguez switch (initiator) { 771926a0a09SLuis R. Rodriguez case NL80211_REGDOM_SET_BY_CORE: 772926a0a09SLuis R. Rodriguez return "Set by core"; 773926a0a09SLuis R. Rodriguez case NL80211_REGDOM_SET_BY_USER: 774926a0a09SLuis R. Rodriguez return "Set by user"; 775926a0a09SLuis R. Rodriguez case NL80211_REGDOM_SET_BY_DRIVER: 776926a0a09SLuis R. Rodriguez return "Set by driver"; 777926a0a09SLuis R. Rodriguez case NL80211_REGDOM_SET_BY_COUNTRY_IE: 778926a0a09SLuis R. Rodriguez return "Set by country IE"; 779926a0a09SLuis R. Rodriguez default: 780926a0a09SLuis R. Rodriguez WARN_ON(1); 781926a0a09SLuis R. Rodriguez return "Set by bug"; 782926a0a09SLuis R. Rodriguez } 783926a0a09SLuis R. Rodriguez } 784e702d3cfSLuis R. Rodriguez 785e702d3cfSLuis R. Rodriguez static void chan_reg_rule_print_dbg(struct ieee80211_channel *chan, 786e702d3cfSLuis R. Rodriguez const struct ieee80211_reg_rule *reg_rule) 787e702d3cfSLuis R. Rodriguez { 788e702d3cfSLuis R. Rodriguez const struct ieee80211_power_rule *power_rule; 789e702d3cfSLuis R. Rodriguez const struct ieee80211_freq_range *freq_range; 790e702d3cfSLuis R. Rodriguez char max_antenna_gain[32]; 791e702d3cfSLuis R. Rodriguez 792e702d3cfSLuis R. Rodriguez power_rule = ®_rule->power_rule; 793e702d3cfSLuis R. Rodriguez freq_range = ®_rule->freq_range; 794e702d3cfSLuis R. Rodriguez 795e702d3cfSLuis R. Rodriguez if (!power_rule->max_antenna_gain) 796e702d3cfSLuis R. Rodriguez snprintf(max_antenna_gain, 32, "N/A"); 797e702d3cfSLuis R. Rodriguez else 798e702d3cfSLuis R. Rodriguez snprintf(max_antenna_gain, 32, "%d", power_rule->max_antenna_gain); 799e702d3cfSLuis R. Rodriguez 800fe7ef5e9SJohannes Berg REG_DBG_PRINT("Updating information on frequency %d MHz with regulatory rule:\n", 801fe7ef5e9SJohannes Berg chan->center_freq); 802e702d3cfSLuis R. Rodriguez 80356e6786eSPavel Roskin REG_DBG_PRINT("%d KHz - %d KHz @ %d KHz), (%s mBi, %d mBm)\n", 8041a919318SJohannes Berg freq_range->start_freq_khz, freq_range->end_freq_khz, 8051a919318SJohannes Berg freq_range->max_bandwidth_khz, max_antenna_gain, 806e702d3cfSLuis R. Rodriguez power_rule->max_eirp); 807e702d3cfSLuis R. Rodriguez } 808e702d3cfSLuis R. Rodriguez #else 809e702d3cfSLuis R. Rodriguez static void chan_reg_rule_print_dbg(struct ieee80211_channel *chan, 810e702d3cfSLuis R. Rodriguez const struct ieee80211_reg_rule *reg_rule) 811e702d3cfSLuis R. Rodriguez { 812e702d3cfSLuis R. Rodriguez return; 813e702d3cfSLuis R. Rodriguez } 814926a0a09SLuis R. Rodriguez #endif 815926a0a09SLuis R. Rodriguez 816038659e7SLuis R. Rodriguez /* 817038659e7SLuis R. Rodriguez * Note that right now we assume the desired channel bandwidth 818038659e7SLuis R. Rodriguez * is always 20 MHz for each individual channel (HT40 uses 20 MHz 819fe7ef5e9SJohannes Berg * per channel, the primary and the extension channel). 820038659e7SLuis R. Rodriguez */ 8217ca43d03SLuis R. Rodriguez static void handle_channel(struct wiphy *wiphy, 8227ca43d03SLuis R. Rodriguez enum nl80211_reg_initiator initiator, 823fdc9d7b2SJohannes Berg struct ieee80211_channel *chan) 824b2e1b302SLuis R. Rodriguez { 825b2e1b302SLuis R. Rodriguez int r; 826038659e7SLuis R. Rodriguez u32 flags, bw_flags = 0; 827b2e1b302SLuis R. Rodriguez const struct ieee80211_reg_rule *reg_rule = NULL; 828b2e1b302SLuis R. Rodriguez const struct ieee80211_power_rule *power_rule = NULL; 829038659e7SLuis R. Rodriguez const struct ieee80211_freq_range *freq_range = NULL; 830fe33eb39SLuis R. Rodriguez struct wiphy *request_wiphy = NULL; 831a92a3ce7SLuis R. Rodriguez 832806a9e39SLuis R. Rodriguez request_wiphy = wiphy_idx_to_wiphy(last_request->wiphy_idx); 833806a9e39SLuis R. Rodriguez 834a92a3ce7SLuis R. Rodriguez flags = chan->orig_flags; 835b2e1b302SLuis R. Rodriguez 836fe7ef5e9SJohannes Berg r = freq_reg_info(wiphy, MHZ_TO_KHZ(chan->center_freq), ®_rule); 837ca4ffe8fSLuis R. Rodriguez if (r) { 838ca4ffe8fSLuis R. Rodriguez /* 839ca4ffe8fSLuis R. Rodriguez * We will disable all channels that do not match our 84025985edcSLucas De Marchi * received regulatory rule unless the hint is coming 841ca4ffe8fSLuis R. Rodriguez * from a Country IE and the Country IE had no information 842ca4ffe8fSLuis R. Rodriguez * about a band. The IEEE 802.11 spec allows for an AP 843ca4ffe8fSLuis R. Rodriguez * to send only a subset of the regulatory rules allowed, 844ca4ffe8fSLuis R. Rodriguez * so an AP in the US that only supports 2.4 GHz may only send 845ca4ffe8fSLuis R. Rodriguez * a country IE with information for the 2.4 GHz band 846ca4ffe8fSLuis R. Rodriguez * while 5 GHz is still supported. 847ca4ffe8fSLuis R. Rodriguez */ 848ca4ffe8fSLuis R. Rodriguez if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE && 849ca4ffe8fSLuis R. Rodriguez r == -ERANGE) 8508318d78aSJohannes Berg return; 8518318d78aSJohannes Berg 852d91e41b6SLuis R. Rodriguez REG_DBG_PRINT("Disabling freq %d MHz\n", chan->center_freq); 853ca4ffe8fSLuis R. Rodriguez chan->flags = IEEE80211_CHAN_DISABLED; 854ca4ffe8fSLuis R. Rodriguez return; 855ca4ffe8fSLuis R. Rodriguez } 856ca4ffe8fSLuis R. Rodriguez 857fe7ef5e9SJohannes Berg chan_reg_rule_print_dbg(chan, reg_rule); 858e702d3cfSLuis R. Rodriguez 859b2e1b302SLuis R. Rodriguez power_rule = ®_rule->power_rule; 860038659e7SLuis R. Rodriguez freq_range = ®_rule->freq_range; 861038659e7SLuis R. Rodriguez 862038659e7SLuis R. Rodriguez if (freq_range->max_bandwidth_khz < MHZ_TO_KHZ(40)) 863038659e7SLuis R. Rodriguez bw_flags = IEEE80211_CHAN_NO_HT40; 864b2e1b302SLuis R. Rodriguez 8657db90f4aSLuis R. Rodriguez if (last_request->initiator == NL80211_REGDOM_SET_BY_DRIVER && 866806a9e39SLuis R. Rodriguez request_wiphy && request_wiphy == wiphy && 8675be83de5SJohannes Berg request_wiphy->flags & WIPHY_FLAG_STRICT_REGULATORY) { 868fb1fc7adSLuis R. Rodriguez /* 86925985edcSLucas De Marchi * This guarantees the driver's requested regulatory domain 870f976376dSLuis R. Rodriguez * will always be used as a base for further regulatory 871fb1fc7adSLuis R. Rodriguez * settings 872fb1fc7adSLuis R. Rodriguez */ 873f976376dSLuis R. Rodriguez chan->flags = chan->orig_flags = 874038659e7SLuis R. Rodriguez map_regdom_flags(reg_rule->flags) | bw_flags; 875f976376dSLuis R. Rodriguez chan->max_antenna_gain = chan->orig_mag = 876f976376dSLuis R. Rodriguez (int) MBI_TO_DBI(power_rule->max_antenna_gain); 877279f0f55SFelix Fietkau chan->max_reg_power = chan->max_power = chan->orig_mpwr = 878f976376dSLuis R. Rodriguez (int) MBM_TO_DBM(power_rule->max_eirp); 879f976376dSLuis R. Rodriguez return; 880f976376dSLuis R. Rodriguez } 881f976376dSLuis R. Rodriguez 882aa3d7eefSRajkumar Manoharan chan->beacon_found = false; 883038659e7SLuis R. Rodriguez chan->flags = flags | bw_flags | map_regdom_flags(reg_rule->flags); 8841a919318SJohannes Berg chan->max_antenna_gain = 8851a919318SJohannes Berg min_t(int, chan->orig_mag, 8861a919318SJohannes Berg MBI_TO_DBI(power_rule->max_antenna_gain)); 887eccc068eSHong Wu chan->max_reg_power = (int) MBM_TO_DBM(power_rule->max_eirp); 8885e31fc08SStanislaw Gruszka if (chan->orig_mpwr) { 8895e31fc08SStanislaw Gruszka /* 8905e31fc08SStanislaw Gruszka * Devices that have their own custom regulatory domain 8915e31fc08SStanislaw Gruszka * but also use WIPHY_FLAG_STRICT_REGULATORY will follow the 8925e31fc08SStanislaw Gruszka * passed country IE power settings. 8935e31fc08SStanislaw Gruszka */ 8945e31fc08SStanislaw Gruszka if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE && 8955e31fc08SStanislaw Gruszka wiphy->flags & WIPHY_FLAG_CUSTOM_REGULATORY && 8965e31fc08SStanislaw Gruszka wiphy->flags & WIPHY_FLAG_STRICT_REGULATORY) 8975e31fc08SStanislaw Gruszka chan->max_power = chan->max_reg_power; 8985e31fc08SStanislaw Gruszka else 8995e31fc08SStanislaw Gruszka chan->max_power = min(chan->orig_mpwr, 9005e31fc08SStanislaw Gruszka chan->max_reg_power); 9015e31fc08SStanislaw Gruszka } else 9025e31fc08SStanislaw Gruszka chan->max_power = chan->max_reg_power; 9038318d78aSJohannes Berg } 9048318d78aSJohannes Berg 905fdc9d7b2SJohannes Berg static void handle_band(struct wiphy *wiphy, 906fdc9d7b2SJohannes Berg enum nl80211_reg_initiator initiator, 907fdc9d7b2SJohannes Berg struct ieee80211_supported_band *sband) 9088318d78aSJohannes Berg { 909a92a3ce7SLuis R. Rodriguez unsigned int i; 910a92a3ce7SLuis R. Rodriguez 911fdc9d7b2SJohannes Berg if (!sband) 912fdc9d7b2SJohannes Berg return; 9138318d78aSJohannes Berg 9148318d78aSJohannes Berg for (i = 0; i < sband->n_channels; i++) 915fdc9d7b2SJohannes Berg handle_channel(wiphy, initiator, &sband->channels[i]); 9168318d78aSJohannes Berg } 9178318d78aSJohannes Berg 91857b5ce07SLuis R. Rodriguez static bool reg_request_cell_base(struct regulatory_request *request) 91957b5ce07SLuis R. Rodriguez { 92057b5ce07SLuis R. Rodriguez if (request->initiator != NL80211_REGDOM_SET_BY_USER) 92157b5ce07SLuis R. Rodriguez return false; 9221a919318SJohannes Berg return request->user_reg_hint_type == NL80211_USER_REG_HINT_CELL_BASE; 92357b5ce07SLuis R. Rodriguez } 92457b5ce07SLuis R. Rodriguez 92557b5ce07SLuis R. Rodriguez bool reg_last_request_cell_base(void) 92657b5ce07SLuis R. Rodriguez { 927ebd0fd2bSMohammed Shafi Shajakhan bool val; 9281a919318SJohannes Berg 92957b5ce07SLuis R. Rodriguez mutex_lock(®_mutex); 930ebd0fd2bSMohammed Shafi Shajakhan val = reg_request_cell_base(last_request); 93157b5ce07SLuis R. Rodriguez mutex_unlock(®_mutex); 9321a919318SJohannes Berg 933ebd0fd2bSMohammed Shafi Shajakhan return val; 93457b5ce07SLuis R. Rodriguez } 93557b5ce07SLuis R. Rodriguez 93657b5ce07SLuis R. Rodriguez #ifdef CONFIG_CFG80211_CERTIFICATION_ONUS 93757b5ce07SLuis R. Rodriguez /* Core specific check */ 9382f92212bSJohannes Berg static enum reg_request_treatment 9392f92212bSJohannes Berg reg_ignore_cell_hint(struct regulatory_request *pending_request) 94057b5ce07SLuis R. Rodriguez { 94157b5ce07SLuis R. Rodriguez if (!reg_num_devs_support_basehint) 9422f92212bSJohannes Berg return REG_REQ_IGNORE; 94357b5ce07SLuis R. Rodriguez 9441a919318SJohannes Berg if (reg_request_cell_base(last_request) && 9451a919318SJohannes Berg !regdom_changes(pending_request->alpha2)) 9462f92212bSJohannes Berg return REG_REQ_ALREADY_SET; 9471a919318SJohannes Berg 9482f92212bSJohannes Berg return REG_REQ_OK; 94957b5ce07SLuis R. Rodriguez } 95057b5ce07SLuis R. Rodriguez 95157b5ce07SLuis R. Rodriguez /* Device specific check */ 95257b5ce07SLuis R. Rodriguez static bool reg_dev_ignore_cell_hint(struct wiphy *wiphy) 95357b5ce07SLuis R. Rodriguez { 9541a919318SJohannes Berg return !(wiphy->features & NL80211_FEATURE_CELL_BASE_REG_HINTS); 95557b5ce07SLuis R. Rodriguez } 95657b5ce07SLuis R. Rodriguez #else 95757b5ce07SLuis R. Rodriguez static int reg_ignore_cell_hint(struct regulatory_request *pending_request) 95857b5ce07SLuis R. Rodriguez { 9592f92212bSJohannes Berg return REG_REQ_IGNORE; 96057b5ce07SLuis R. Rodriguez } 9611a919318SJohannes Berg 9621a919318SJohannes Berg static bool reg_dev_ignore_cell_hint(struct wiphy *wiphy) 96357b5ce07SLuis R. Rodriguez { 96457b5ce07SLuis R. Rodriguez return true; 96557b5ce07SLuis R. Rodriguez } 96657b5ce07SLuis R. Rodriguez #endif 96757b5ce07SLuis R. Rodriguez 96857b5ce07SLuis R. Rodriguez 9697db90f4aSLuis R. Rodriguez static bool ignore_reg_update(struct wiphy *wiphy, 9707db90f4aSLuis R. Rodriguez enum nl80211_reg_initiator initiator) 97114b9815aSLuis R. Rodriguez { 972926a0a09SLuis R. Rodriguez if (!last_request) { 9731a919318SJohannes Berg REG_DBG_PRINT("Ignoring regulatory request %s since last_request is not set\n", 974926a0a09SLuis R. Rodriguez reg_initiator_name(initiator)); 97514b9815aSLuis R. Rodriguez return true; 976926a0a09SLuis R. Rodriguez } 977926a0a09SLuis R. Rodriguez 9787db90f4aSLuis R. Rodriguez if (initiator == NL80211_REGDOM_SET_BY_CORE && 979926a0a09SLuis R. Rodriguez wiphy->flags & WIPHY_FLAG_CUSTOM_REGULATORY) { 9801a919318SJohannes Berg REG_DBG_PRINT("Ignoring regulatory request %s since the driver uses its own custom regulatory domain\n", 981926a0a09SLuis R. Rodriguez reg_initiator_name(initiator)); 98214b9815aSLuis R. Rodriguez return true; 983926a0a09SLuis R. Rodriguez } 984926a0a09SLuis R. Rodriguez 985fb1fc7adSLuis R. Rodriguez /* 986fb1fc7adSLuis R. Rodriguez * wiphy->regd will be set once the device has its own 987fb1fc7adSLuis R. Rodriguez * desired regulatory domain set 988fb1fc7adSLuis R. Rodriguez */ 9895be83de5SJohannes Berg if (wiphy->flags & WIPHY_FLAG_STRICT_REGULATORY && !wiphy->regd && 990749b527bSLuis R. Rodriguez initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && 991926a0a09SLuis R. Rodriguez !is_world_regdom(last_request->alpha2)) { 9921a919318SJohannes Berg REG_DBG_PRINT("Ignoring regulatory request %s since the driver requires its own regulatory domain to be set first\n", 993926a0a09SLuis R. Rodriguez reg_initiator_name(initiator)); 99414b9815aSLuis R. Rodriguez return true; 995926a0a09SLuis R. Rodriguez } 996926a0a09SLuis R. Rodriguez 99757b5ce07SLuis R. Rodriguez if (reg_request_cell_base(last_request)) 99857b5ce07SLuis R. Rodriguez return reg_dev_ignore_cell_hint(wiphy); 99957b5ce07SLuis R. Rodriguez 100014b9815aSLuis R. Rodriguez return false; 100114b9815aSLuis R. Rodriguez } 100214b9815aSLuis R. Rodriguez 10031a919318SJohannes Berg static void handle_reg_beacon(struct wiphy *wiphy, unsigned int chan_idx, 1004e38f8a7aSLuis R. Rodriguez struct reg_beacon *reg_beacon) 1005e38f8a7aSLuis R. Rodriguez { 1006e38f8a7aSLuis R. Rodriguez struct ieee80211_supported_band *sband; 1007e38f8a7aSLuis R. Rodriguez struct ieee80211_channel *chan; 10086bad8766SLuis R. Rodriguez bool channel_changed = false; 10096bad8766SLuis R. Rodriguez struct ieee80211_channel chan_before; 1010e38f8a7aSLuis R. Rodriguez 1011e38f8a7aSLuis R. Rodriguez sband = wiphy->bands[reg_beacon->chan.band]; 1012e38f8a7aSLuis R. Rodriguez chan = &sband->channels[chan_idx]; 1013e38f8a7aSLuis R. Rodriguez 1014e38f8a7aSLuis R. Rodriguez if (likely(chan->center_freq != reg_beacon->chan.center_freq)) 1015e38f8a7aSLuis R. Rodriguez return; 1016e38f8a7aSLuis R. Rodriguez 10176bad8766SLuis R. Rodriguez if (chan->beacon_found) 10186bad8766SLuis R. Rodriguez return; 10196bad8766SLuis R. Rodriguez 10206bad8766SLuis R. Rodriguez chan->beacon_found = true; 10216bad8766SLuis R. Rodriguez 10225be83de5SJohannes Berg if (wiphy->flags & WIPHY_FLAG_DISABLE_BEACON_HINTS) 102337184244SLuis R. Rodriguez return; 102437184244SLuis R. Rodriguez 10256bad8766SLuis R. Rodriguez chan_before.center_freq = chan->center_freq; 10266bad8766SLuis R. Rodriguez chan_before.flags = chan->flags; 10276bad8766SLuis R. Rodriguez 102837184244SLuis R. Rodriguez if (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN) { 1029e38f8a7aSLuis R. Rodriguez chan->flags &= ~IEEE80211_CHAN_PASSIVE_SCAN; 10306bad8766SLuis R. Rodriguez channel_changed = true; 1031e38f8a7aSLuis R. Rodriguez } 1032e38f8a7aSLuis R. Rodriguez 103337184244SLuis R. Rodriguez if (chan->flags & IEEE80211_CHAN_NO_IBSS) { 1034e38f8a7aSLuis R. Rodriguez chan->flags &= ~IEEE80211_CHAN_NO_IBSS; 10356bad8766SLuis R. Rodriguez channel_changed = true; 1036e38f8a7aSLuis R. Rodriguez } 1037e38f8a7aSLuis R. Rodriguez 10386bad8766SLuis R. Rodriguez if (channel_changed) 10396bad8766SLuis R. Rodriguez nl80211_send_beacon_hint_event(wiphy, &chan_before, chan); 1040e38f8a7aSLuis R. Rodriguez } 1041e38f8a7aSLuis R. Rodriguez 1042e38f8a7aSLuis R. Rodriguez /* 1043e38f8a7aSLuis R. Rodriguez * Called when a scan on a wiphy finds a beacon on 1044e38f8a7aSLuis R. Rodriguez * new channel 1045e38f8a7aSLuis R. Rodriguez */ 1046e38f8a7aSLuis R. Rodriguez static void wiphy_update_new_beacon(struct wiphy *wiphy, 1047e38f8a7aSLuis R. Rodriguez struct reg_beacon *reg_beacon) 1048e38f8a7aSLuis R. Rodriguez { 1049e38f8a7aSLuis R. Rodriguez unsigned int i; 1050e38f8a7aSLuis R. Rodriguez struct ieee80211_supported_band *sband; 1051e38f8a7aSLuis R. Rodriguez 1052e38f8a7aSLuis R. Rodriguez if (!wiphy->bands[reg_beacon->chan.band]) 1053e38f8a7aSLuis R. Rodriguez return; 1054e38f8a7aSLuis R. Rodriguez 1055e38f8a7aSLuis R. Rodriguez sband = wiphy->bands[reg_beacon->chan.band]; 1056e38f8a7aSLuis R. Rodriguez 1057e38f8a7aSLuis R. Rodriguez for (i = 0; i < sband->n_channels; i++) 1058e38f8a7aSLuis R. Rodriguez handle_reg_beacon(wiphy, i, reg_beacon); 1059e38f8a7aSLuis R. Rodriguez } 1060e38f8a7aSLuis R. Rodriguez 1061e38f8a7aSLuis R. Rodriguez /* 1062e38f8a7aSLuis R. Rodriguez * Called upon reg changes or a new wiphy is added 1063e38f8a7aSLuis R. Rodriguez */ 1064e38f8a7aSLuis R. Rodriguez static void wiphy_update_beacon_reg(struct wiphy *wiphy) 1065e38f8a7aSLuis R. Rodriguez { 1066e38f8a7aSLuis R. Rodriguez unsigned int i; 1067e38f8a7aSLuis R. Rodriguez struct ieee80211_supported_band *sband; 1068e38f8a7aSLuis R. Rodriguez struct reg_beacon *reg_beacon; 1069e38f8a7aSLuis R. Rodriguez 1070e38f8a7aSLuis R. Rodriguez list_for_each_entry(reg_beacon, ®_beacon_list, list) { 1071e38f8a7aSLuis R. Rodriguez if (!wiphy->bands[reg_beacon->chan.band]) 1072e38f8a7aSLuis R. Rodriguez continue; 1073e38f8a7aSLuis R. Rodriguez sband = wiphy->bands[reg_beacon->chan.band]; 1074e38f8a7aSLuis R. Rodriguez for (i = 0; i < sband->n_channels; i++) 1075e38f8a7aSLuis R. Rodriguez handle_reg_beacon(wiphy, i, reg_beacon); 1076e38f8a7aSLuis R. Rodriguez } 1077e38f8a7aSLuis R. Rodriguez } 1078e38f8a7aSLuis R. Rodriguez 1079e38f8a7aSLuis R. Rodriguez static bool reg_is_world_roaming(struct wiphy *wiphy) 1080e38f8a7aSLuis R. Rodriguez { 1081458f4f9eSJohannes Berg const struct ieee80211_regdomain *cr = get_cfg80211_regdom(); 1082458f4f9eSJohannes Berg const struct ieee80211_regdomain *wr = get_wiphy_regdom(wiphy); 1083e8da2bb4SJohannes Berg 1084458f4f9eSJohannes Berg if (is_world_regdom(cr->alpha2) || (wr && is_world_regdom(wr->alpha2))) 1085e38f8a7aSLuis R. Rodriguez return true; 1086458f4f9eSJohannes Berg 1087b1ed8dddSLuis R. Rodriguez if (last_request && 1088b1ed8dddSLuis R. Rodriguez last_request->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && 10895be83de5SJohannes Berg wiphy->flags & WIPHY_FLAG_CUSTOM_REGULATORY) 1090e38f8a7aSLuis R. Rodriguez return true; 1091458f4f9eSJohannes Berg 1092e38f8a7aSLuis R. Rodriguez return false; 1093e38f8a7aSLuis R. Rodriguez } 1094e38f8a7aSLuis R. Rodriguez 1095e38f8a7aSLuis R. Rodriguez /* Reap the advantages of previously found beacons */ 1096e38f8a7aSLuis R. Rodriguez static void reg_process_beacons(struct wiphy *wiphy) 1097e38f8a7aSLuis R. Rodriguez { 1098b1ed8dddSLuis R. Rodriguez /* 1099b1ed8dddSLuis R. Rodriguez * Means we are just firing up cfg80211, so no beacons would 1100b1ed8dddSLuis R. Rodriguez * have been processed yet. 1101b1ed8dddSLuis R. Rodriguez */ 1102b1ed8dddSLuis R. Rodriguez if (!last_request) 1103b1ed8dddSLuis R. Rodriguez return; 1104e38f8a7aSLuis R. Rodriguez if (!reg_is_world_roaming(wiphy)) 1105e38f8a7aSLuis R. Rodriguez return; 1106e38f8a7aSLuis R. Rodriguez wiphy_update_beacon_reg(wiphy); 1107e38f8a7aSLuis R. Rodriguez } 1108e38f8a7aSLuis R. Rodriguez 11091a919318SJohannes Berg static bool is_ht40_allowed(struct ieee80211_channel *chan) 1110038659e7SLuis R. Rodriguez { 1111038659e7SLuis R. Rodriguez if (!chan) 1112038659e7SLuis R. Rodriguez return false; 11131a919318SJohannes Berg if (chan->flags & IEEE80211_CHAN_DISABLED) 11141a919318SJohannes Berg return false; 11151a919318SJohannes Berg /* This would happen when regulatory rules disallow HT40 completely */ 11161a919318SJohannes Berg return !(chan->flags & IEEE80211_CHAN_NO_HT40); 1117038659e7SLuis R. Rodriguez } 1118038659e7SLuis R. Rodriguez 1119038659e7SLuis R. Rodriguez static void reg_process_ht_flags_channel(struct wiphy *wiphy, 1120fdc9d7b2SJohannes Berg struct ieee80211_channel *channel) 1121038659e7SLuis R. Rodriguez { 1122fdc9d7b2SJohannes Berg struct ieee80211_supported_band *sband = wiphy->bands[channel->band]; 1123038659e7SLuis R. Rodriguez struct ieee80211_channel *channel_before = NULL, *channel_after = NULL; 1124038659e7SLuis R. Rodriguez unsigned int i; 1125038659e7SLuis R. Rodriguez 11261a919318SJohannes Berg if (!is_ht40_allowed(channel)) { 1127038659e7SLuis R. Rodriguez channel->flags |= IEEE80211_CHAN_NO_HT40; 1128038659e7SLuis R. Rodriguez return; 1129038659e7SLuis R. Rodriguez } 1130038659e7SLuis R. Rodriguez 1131038659e7SLuis R. Rodriguez /* 1132038659e7SLuis R. Rodriguez * We need to ensure the extension channels exist to 1133038659e7SLuis R. Rodriguez * be able to use HT40- or HT40+, this finds them (or not) 1134038659e7SLuis R. Rodriguez */ 1135038659e7SLuis R. Rodriguez for (i = 0; i < sband->n_channels; i++) { 1136038659e7SLuis R. Rodriguez struct ieee80211_channel *c = &sband->channels[i]; 11371a919318SJohannes Berg 1138038659e7SLuis R. Rodriguez if (c->center_freq == (channel->center_freq - 20)) 1139038659e7SLuis R. Rodriguez channel_before = c; 1140038659e7SLuis R. Rodriguez if (c->center_freq == (channel->center_freq + 20)) 1141038659e7SLuis R. Rodriguez channel_after = c; 1142038659e7SLuis R. Rodriguez } 1143038659e7SLuis R. Rodriguez 1144038659e7SLuis R. Rodriguez /* 1145038659e7SLuis R. Rodriguez * Please note that this assumes target bandwidth is 20 MHz, 1146038659e7SLuis R. Rodriguez * if that ever changes we also need to change the below logic 1147038659e7SLuis R. Rodriguez * to include that as well. 1148038659e7SLuis R. Rodriguez */ 11491a919318SJohannes Berg if (!is_ht40_allowed(channel_before)) 1150689da1b3SLuis R. Rodriguez channel->flags |= IEEE80211_CHAN_NO_HT40MINUS; 1151038659e7SLuis R. Rodriguez else 1152689da1b3SLuis R. Rodriguez channel->flags &= ~IEEE80211_CHAN_NO_HT40MINUS; 1153038659e7SLuis R. Rodriguez 11541a919318SJohannes Berg if (!is_ht40_allowed(channel_after)) 1155689da1b3SLuis R. Rodriguez channel->flags |= IEEE80211_CHAN_NO_HT40PLUS; 1156038659e7SLuis R. Rodriguez else 1157689da1b3SLuis R. Rodriguez channel->flags &= ~IEEE80211_CHAN_NO_HT40PLUS; 1158038659e7SLuis R. Rodriguez } 1159038659e7SLuis R. Rodriguez 1160038659e7SLuis R. Rodriguez static void reg_process_ht_flags_band(struct wiphy *wiphy, 1161fdc9d7b2SJohannes Berg struct ieee80211_supported_band *sband) 1162038659e7SLuis R. Rodriguez { 1163038659e7SLuis R. Rodriguez unsigned int i; 1164038659e7SLuis R. Rodriguez 1165fdc9d7b2SJohannes Berg if (!sband) 1166fdc9d7b2SJohannes Berg return; 1167038659e7SLuis R. Rodriguez 1168038659e7SLuis R. Rodriguez for (i = 0; i < sband->n_channels; i++) 1169fdc9d7b2SJohannes Berg reg_process_ht_flags_channel(wiphy, &sband->channels[i]); 1170038659e7SLuis R. Rodriguez } 1171038659e7SLuis R. Rodriguez 1172038659e7SLuis R. Rodriguez static void reg_process_ht_flags(struct wiphy *wiphy) 1173038659e7SLuis R. Rodriguez { 1174038659e7SLuis R. Rodriguez enum ieee80211_band band; 1175038659e7SLuis R. Rodriguez 1176038659e7SLuis R. Rodriguez if (!wiphy) 1177038659e7SLuis R. Rodriguez return; 1178038659e7SLuis R. Rodriguez 1179fdc9d7b2SJohannes Berg for (band = 0; band < IEEE80211_NUM_BANDS; band++) 1180fdc9d7b2SJohannes Berg reg_process_ht_flags_band(wiphy, wiphy->bands[band]); 1181038659e7SLuis R. Rodriguez } 1182038659e7SLuis R. Rodriguez 1183eac03e38SSven Neumann static void wiphy_update_regulatory(struct wiphy *wiphy, 11847db90f4aSLuis R. Rodriguez enum nl80211_reg_initiator initiator) 11858318d78aSJohannes Berg { 11868318d78aSJohannes Berg enum ieee80211_band band; 1187d46e5b1dSLuis R. Rodriguez 1188eac03e38SSven Neumann assert_reg_lock(); 1189eac03e38SSven Neumann 11907db90f4aSLuis R. Rodriguez if (ignore_reg_update(wiphy, initiator)) 1191a203c2aaSSven Neumann return; 1192a203c2aaSSven Neumann 1193458f4f9eSJohannes Berg last_request->dfs_region = get_cfg80211_regdom()->dfs_region; 1194b68e6b3bSLuis R. Rodriguez 1195fdc9d7b2SJohannes Berg for (band = 0; band < IEEE80211_NUM_BANDS; band++) 1196fdc9d7b2SJohannes Berg handle_band(wiphy, initiator, wiphy->bands[band]); 1197a203c2aaSSven Neumann 1198e38f8a7aSLuis R. Rodriguez reg_process_beacons(wiphy); 1199038659e7SLuis R. Rodriguez reg_process_ht_flags(wiphy); 12001a919318SJohannes Berg 1201b2e1b302SLuis R. Rodriguez if (wiphy->reg_notifier) 1202716f9392SLuis R. Rodriguez wiphy->reg_notifier(wiphy, last_request); 1203b2e1b302SLuis R. Rodriguez } 1204b2e1b302SLuis R. Rodriguez 1205d7549cbbSSven Neumann static void update_all_wiphy_regulatory(enum nl80211_reg_initiator initiator) 1206d7549cbbSSven Neumann { 1207d7549cbbSSven Neumann struct cfg80211_registered_device *rdev; 12084a38994fSRajkumar Manoharan struct wiphy *wiphy; 1209d7549cbbSSven Neumann 1210458f4f9eSJohannes Berg assert_cfg80211_lock(); 1211458f4f9eSJohannes Berg 12124a38994fSRajkumar Manoharan list_for_each_entry(rdev, &cfg80211_rdev_list, list) { 12134a38994fSRajkumar Manoharan wiphy = &rdev->wiphy; 12144a38994fSRajkumar Manoharan wiphy_update_regulatory(wiphy, initiator); 12154a38994fSRajkumar Manoharan /* 12164a38994fSRajkumar Manoharan * Regulatory updates set by CORE are ignored for custom 12174a38994fSRajkumar Manoharan * regulatory cards. Let us notify the changes to the driver, 12184a38994fSRajkumar Manoharan * as some drivers used this to restore its orig_* reg domain. 12194a38994fSRajkumar Manoharan */ 12204a38994fSRajkumar Manoharan if (initiator == NL80211_REGDOM_SET_BY_CORE && 12214a38994fSRajkumar Manoharan wiphy->flags & WIPHY_FLAG_CUSTOM_REGULATORY && 12224a38994fSRajkumar Manoharan wiphy->reg_notifier) 12234a38994fSRajkumar Manoharan wiphy->reg_notifier(wiphy, last_request); 12244a38994fSRajkumar Manoharan } 1225d7549cbbSSven Neumann } 1226d7549cbbSSven Neumann 12271fa25e41SLuis R. Rodriguez static void handle_channel_custom(struct wiphy *wiphy, 1228fdc9d7b2SJohannes Berg struct ieee80211_channel *chan, 12291fa25e41SLuis R. Rodriguez const struct ieee80211_regdomain *regd) 12301fa25e41SLuis R. Rodriguez { 12311fa25e41SLuis R. Rodriguez int r; 1232038659e7SLuis R. Rodriguez u32 bw_flags = 0; 12331fa25e41SLuis R. Rodriguez const struct ieee80211_reg_rule *reg_rule = NULL; 12341fa25e41SLuis R. Rodriguez const struct ieee80211_power_rule *power_rule = NULL; 1235038659e7SLuis R. Rodriguez const struct ieee80211_freq_range *freq_range = NULL; 12361fa25e41SLuis R. Rodriguez 12371a919318SJohannes Berg r = freq_reg_info_regd(wiphy, MHZ_TO_KHZ(chan->center_freq), 1238fe7ef5e9SJohannes Berg ®_rule, regd); 12391fa25e41SLuis R. Rodriguez 12401fa25e41SLuis R. Rodriguez if (r) { 1241fe7ef5e9SJohannes Berg REG_DBG_PRINT("Disabling freq %d MHz as custom regd has no rule that fits it\n", 1242fe7ef5e9SJohannes Berg chan->center_freq); 12431fa25e41SLuis R. Rodriguez chan->flags = IEEE80211_CHAN_DISABLED; 12441fa25e41SLuis R. Rodriguez return; 12451fa25e41SLuis R. Rodriguez } 12461fa25e41SLuis R. Rodriguez 1247fe7ef5e9SJohannes Berg chan_reg_rule_print_dbg(chan, reg_rule); 1248e702d3cfSLuis R. Rodriguez 12491fa25e41SLuis R. Rodriguez power_rule = ®_rule->power_rule; 1250038659e7SLuis R. Rodriguez freq_range = ®_rule->freq_range; 12511fa25e41SLuis R. Rodriguez 1252038659e7SLuis R. Rodriguez if (freq_range->max_bandwidth_khz < MHZ_TO_KHZ(40)) 1253038659e7SLuis R. Rodriguez bw_flags = IEEE80211_CHAN_NO_HT40; 1254038659e7SLuis R. Rodriguez 1255038659e7SLuis R. Rodriguez chan->flags |= map_regdom_flags(reg_rule->flags) | bw_flags; 12561fa25e41SLuis R. Rodriguez chan->max_antenna_gain = (int) MBI_TO_DBI(power_rule->max_antenna_gain); 1257279f0f55SFelix Fietkau chan->max_reg_power = chan->max_power = 1258279f0f55SFelix Fietkau (int) MBM_TO_DBM(power_rule->max_eirp); 12591fa25e41SLuis R. Rodriguez } 12601fa25e41SLuis R. Rodriguez 1261fdc9d7b2SJohannes Berg static void handle_band_custom(struct wiphy *wiphy, 1262fdc9d7b2SJohannes Berg struct ieee80211_supported_band *sband, 12631fa25e41SLuis R. Rodriguez const struct ieee80211_regdomain *regd) 12641fa25e41SLuis R. Rodriguez { 12651fa25e41SLuis R. Rodriguez unsigned int i; 12661fa25e41SLuis R. Rodriguez 1267fdc9d7b2SJohannes Berg if (!sband) 1268fdc9d7b2SJohannes Berg return; 12691fa25e41SLuis R. Rodriguez 12701fa25e41SLuis R. Rodriguez for (i = 0; i < sband->n_channels; i++) 1271fdc9d7b2SJohannes Berg handle_channel_custom(wiphy, &sband->channels[i], regd); 12721fa25e41SLuis R. Rodriguez } 12731fa25e41SLuis R. Rodriguez 12741fa25e41SLuis R. Rodriguez /* Used by drivers prior to wiphy registration */ 12751fa25e41SLuis R. Rodriguez void wiphy_apply_custom_regulatory(struct wiphy *wiphy, 12761fa25e41SLuis R. Rodriguez const struct ieee80211_regdomain *regd) 12771fa25e41SLuis R. Rodriguez { 12781fa25e41SLuis R. Rodriguez enum ieee80211_band band; 1279bbcf3f02SLuis R. Rodriguez unsigned int bands_set = 0; 1280ac46d48eSLuis R. Rodriguez 12811fa25e41SLuis R. Rodriguez for (band = 0; band < IEEE80211_NUM_BANDS; band++) { 1282bbcf3f02SLuis R. Rodriguez if (!wiphy->bands[band]) 1283bbcf3f02SLuis R. Rodriguez continue; 1284fdc9d7b2SJohannes Berg handle_band_custom(wiphy, wiphy->bands[band], regd); 1285bbcf3f02SLuis R. Rodriguez bands_set++; 12861fa25e41SLuis R. Rodriguez } 1287bbcf3f02SLuis R. Rodriguez 1288bbcf3f02SLuis R. Rodriguez /* 1289bbcf3f02SLuis R. Rodriguez * no point in calling this if it won't have any effect 12901a919318SJohannes Berg * on your device's supported bands. 1291bbcf3f02SLuis R. Rodriguez */ 1292bbcf3f02SLuis R. Rodriguez WARN_ON(!bands_set); 12931fa25e41SLuis R. Rodriguez } 12941fa25e41SLuis R. Rodriguez EXPORT_SYMBOL(wiphy_apply_custom_regulatory); 12951fa25e41SLuis R. Rodriguez 129684fa4f43SJohannes Berg /* This has the logic which determines when a new request 129784fa4f43SJohannes Berg * should be ignored. */ 12982f92212bSJohannes Berg static enum reg_request_treatment 12992f92212bSJohannes Berg get_reg_request_treatment(struct wiphy *wiphy, 13002f92cd2eSLuis R. Rodriguez struct regulatory_request *pending_request) 130184fa4f43SJohannes Berg { 1302806a9e39SLuis R. Rodriguez struct wiphy *last_wiphy = NULL; 1303761cf7ecSLuis R. Rodriguez 130484fa4f43SJohannes Berg /* All initial requests are respected */ 130584fa4f43SJohannes Berg if (!last_request) 13062f92212bSJohannes Berg return REG_REQ_OK; 130784fa4f43SJohannes Berg 13082f92cd2eSLuis R. Rodriguez switch (pending_request->initiator) { 13097db90f4aSLuis R. Rodriguez case NL80211_REGDOM_SET_BY_CORE: 13102f92212bSJohannes Berg return REG_REQ_OK; 13117db90f4aSLuis R. Rodriguez case NL80211_REGDOM_SET_BY_COUNTRY_IE: 131257b5ce07SLuis R. Rodriguez if (reg_request_cell_base(last_request)) { 131357b5ce07SLuis R. Rodriguez /* Trust a Cell base station over the AP's country IE */ 131457b5ce07SLuis R. Rodriguez if (regdom_changes(pending_request->alpha2)) 13152f92212bSJohannes Berg return REG_REQ_IGNORE; 13162f92212bSJohannes Berg return REG_REQ_ALREADY_SET; 131757b5ce07SLuis R. Rodriguez } 131857b5ce07SLuis R. Rodriguez 1319806a9e39SLuis R. Rodriguez last_wiphy = wiphy_idx_to_wiphy(last_request->wiphy_idx); 1320806a9e39SLuis R. Rodriguez 13212f92cd2eSLuis R. Rodriguez if (unlikely(!is_an_alpha2(pending_request->alpha2))) 132284fa4f43SJohannes Berg return -EINVAL; 13237db90f4aSLuis R. Rodriguez if (last_request->initiator == 13247db90f4aSLuis R. Rodriguez NL80211_REGDOM_SET_BY_COUNTRY_IE) { 1325806a9e39SLuis R. Rodriguez if (last_wiphy != wiphy) { 132684fa4f43SJohannes Berg /* 132784fa4f43SJohannes Berg * Two cards with two APs claiming different 13281fe90b03SThadeu Lima de Souza Cascardo * Country IE alpha2s. We could 132984fa4f43SJohannes Berg * intersect them, but that seems unlikely 133084fa4f43SJohannes Berg * to be correct. Reject second one for now. 133184fa4f43SJohannes Berg */ 13322f92cd2eSLuis R. Rodriguez if (regdom_changes(pending_request->alpha2)) 13332f92212bSJohannes Berg return REG_REQ_IGNORE; 13342f92212bSJohannes Berg return REG_REQ_ALREADY_SET; 133584fa4f43SJohannes Berg } 1336fb1fc7adSLuis R. Rodriguez /* 1337fb1fc7adSLuis R. Rodriguez * Two consecutive Country IE hints on the same wiphy. 1338fb1fc7adSLuis R. Rodriguez * This should be picked up early by the driver/stack 1339fb1fc7adSLuis R. Rodriguez */ 13402f92cd2eSLuis R. Rodriguez if (WARN_ON(regdom_changes(pending_request->alpha2))) 13412f92212bSJohannes Berg return REG_REQ_OK; 13422f92212bSJohannes Berg return REG_REQ_ALREADY_SET; 134384fa4f43SJohannes Berg } 1344a171fba4SLuis R. Rodriguez return 0; 13457db90f4aSLuis R. Rodriguez case NL80211_REGDOM_SET_BY_DRIVER: 13467db90f4aSLuis R. Rodriguez if (last_request->initiator == NL80211_REGDOM_SET_BY_CORE) { 13472f92cd2eSLuis R. Rodriguez if (regdom_changes(pending_request->alpha2)) 13482f92212bSJohannes Berg return REG_REQ_OK; 13492f92212bSJohannes Berg return REG_REQ_ALREADY_SET; 1350e74b1e7fSLuis R. Rodriguez } 1351fff32c04SLuis R. Rodriguez 1352fff32c04SLuis R. Rodriguez /* 1353fff32c04SLuis R. Rodriguez * This would happen if you unplug and plug your card 1354fff32c04SLuis R. Rodriguez * back in or if you add a new device for which the previously 1355fff32c04SLuis R. Rodriguez * loaded card also agrees on the regulatory domain. 1356fff32c04SLuis R. Rodriguez */ 13577db90f4aSLuis R. Rodriguez if (last_request->initiator == NL80211_REGDOM_SET_BY_DRIVER && 13582f92cd2eSLuis R. Rodriguez !regdom_changes(pending_request->alpha2)) 13592f92212bSJohannes Berg return REG_REQ_ALREADY_SET; 1360fff32c04SLuis R. Rodriguez 13612f92212bSJohannes Berg return REG_REQ_INTERSECT; 13627db90f4aSLuis R. Rodriguez case NL80211_REGDOM_SET_BY_USER: 136357b5ce07SLuis R. Rodriguez if (reg_request_cell_base(pending_request)) 136457b5ce07SLuis R. Rodriguez return reg_ignore_cell_hint(pending_request); 136557b5ce07SLuis R. Rodriguez 136657b5ce07SLuis R. Rodriguez if (reg_request_cell_base(last_request)) 13672f92212bSJohannes Berg return REG_REQ_IGNORE; 136857b5ce07SLuis R. Rodriguez 13697db90f4aSLuis R. Rodriguez if (last_request->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) 13702f92212bSJohannes Berg return REG_REQ_INTERSECT; 1371fb1fc7adSLuis R. Rodriguez /* 1372fb1fc7adSLuis R. Rodriguez * If the user knows better the user should set the regdom 1373fb1fc7adSLuis R. Rodriguez * to their country before the IE is picked up 1374fb1fc7adSLuis R. Rodriguez */ 13757db90f4aSLuis R. Rodriguez if (last_request->initiator == NL80211_REGDOM_SET_BY_USER && 13763f2355cbSLuis R. Rodriguez last_request->intersect) 13772f92212bSJohannes Berg return REG_REQ_IGNORE; 1378fb1fc7adSLuis R. Rodriguez /* 1379fb1fc7adSLuis R. Rodriguez * Process user requests only after previous user/driver/core 1380fb1fc7adSLuis R. Rodriguez * requests have been processed 1381fb1fc7adSLuis R. Rodriguez */ 13821a919318SJohannes Berg if ((last_request->initiator == NL80211_REGDOM_SET_BY_CORE || 13837db90f4aSLuis R. Rodriguez last_request->initiator == NL80211_REGDOM_SET_BY_DRIVER || 13841a919318SJohannes Berg last_request->initiator == NL80211_REGDOM_SET_BY_USER) && 13851a919318SJohannes Berg regdom_changes(last_request->alpha2)) 13862f92212bSJohannes Berg return REG_REQ_IGNORE; 13875eebade6SLuis R. Rodriguez 1388baeb66feSJohn W. Linville if (!regdom_changes(pending_request->alpha2)) 13892f92212bSJohannes Berg return REG_REQ_ALREADY_SET; 1390e74b1e7fSLuis R. Rodriguez 13912f92212bSJohannes Berg return REG_REQ_OK; 139284fa4f43SJohannes Berg } 139384fa4f43SJohannes Berg 13942f92212bSJohannes Berg return REG_REQ_IGNORE; 139584fa4f43SJohannes Berg } 139684fa4f43SJohannes Berg 1397b2e253cfSLuis R. Rodriguez static void reg_set_request_processed(void) 1398b2e253cfSLuis R. Rodriguez { 1399b2e253cfSLuis R. Rodriguez bool need_more_processing = false; 1400b2e253cfSLuis R. Rodriguez 1401b2e253cfSLuis R. Rodriguez last_request->processed = true; 1402b2e253cfSLuis R. Rodriguez 1403b2e253cfSLuis R. Rodriguez spin_lock(®_requests_lock); 1404b2e253cfSLuis R. Rodriguez if (!list_empty(®_requests_list)) 1405b2e253cfSLuis R. Rodriguez need_more_processing = true; 1406b2e253cfSLuis R. Rodriguez spin_unlock(®_requests_lock); 1407b2e253cfSLuis R. Rodriguez 1408a90c7a31SLuis R. Rodriguez if (last_request->initiator == NL80211_REGDOM_SET_BY_USER) 1409fe20b39eSEliad Peller cancel_delayed_work(®_timeout); 1410a90c7a31SLuis R. Rodriguez 1411b2e253cfSLuis R. Rodriguez if (need_more_processing) 1412b2e253cfSLuis R. Rodriguez schedule_work(®_work); 1413b2e253cfSLuis R. Rodriguez } 1414b2e253cfSLuis R. Rodriguez 1415d1c96a9aSLuis R. Rodriguez /** 1416d1c96a9aSLuis R. Rodriguez * __regulatory_hint - hint to the wireless core a regulatory domain 1417d1c96a9aSLuis R. Rodriguez * @wiphy: if the hint comes from country information from an AP, this 1418d1c96a9aSLuis R. Rodriguez * is required to be set to the wiphy that received the information 141928da32d7SLuis R. Rodriguez * @pending_request: the regulatory request currently being processed 1420d1c96a9aSLuis R. Rodriguez * 1421d1c96a9aSLuis R. Rodriguez * The Wireless subsystem can use this function to hint to the wireless core 142228da32d7SLuis R. Rodriguez * what it believes should be the current regulatory domain. 1423d1c96a9aSLuis R. Rodriguez * 14242f92212bSJohannes Berg * Returns one of the different reg request treatment values. 1425d1c96a9aSLuis R. Rodriguez * 1426458f4f9eSJohannes Berg * Caller must hold ®_mutex 1427d1c96a9aSLuis R. Rodriguez */ 14282f92212bSJohannes Berg static enum reg_request_treatment 14292f92212bSJohannes Berg __regulatory_hint(struct wiphy *wiphy, 143028da32d7SLuis R. Rodriguez struct regulatory_request *pending_request) 1431b2e1b302SLuis R. Rodriguez { 1432e9763c3cSJohannes Berg const struct ieee80211_regdomain *regd; 14339c96477dSLuis R. Rodriguez bool intersect = false; 14342f92212bSJohannes Berg enum reg_request_treatment treatment; 1435b2e1b302SLuis R. Rodriguez 14362f92212bSJohannes Berg treatment = get_reg_request_treatment(wiphy, pending_request); 14379c96477dSLuis R. Rodriguez 14382f92212bSJohannes Berg switch (treatment) { 14392f92212bSJohannes Berg case REG_REQ_INTERSECT: 14407db90f4aSLuis R. Rodriguez if (pending_request->initiator == 14417db90f4aSLuis R. Rodriguez NL80211_REGDOM_SET_BY_DRIVER) { 1442458f4f9eSJohannes Berg regd = reg_copy_regd(get_cfg80211_regdom()); 1443e9763c3cSJohannes Berg if (IS_ERR(regd)) { 1444d951c1ddSLuis R. Rodriguez kfree(pending_request); 1445e9763c3cSJohannes Berg return PTR_ERR(regd); 14463e0c3ff3SLuis R. Rodriguez } 1447458f4f9eSJohannes Berg rcu_assign_pointer(wiphy->regd, regd); 1448d951c1ddSLuis R. Rodriguez } 14493e0c3ff3SLuis R. Rodriguez intersect = true; 14502f92212bSJohannes Berg break; 14512f92212bSJohannes Berg case REG_REQ_OK: 14522f92212bSJohannes Berg break; 14532f92212bSJohannes Berg default: 1454fb1fc7adSLuis R. Rodriguez /* 1455fb1fc7adSLuis R. Rodriguez * If the regulatory domain being requested by the 14563e0c3ff3SLuis R. Rodriguez * driver has already been set just copy it to the 1457fb1fc7adSLuis R. Rodriguez * wiphy 1458fb1fc7adSLuis R. Rodriguez */ 14592f92212bSJohannes Berg if (treatment == REG_REQ_ALREADY_SET && 14602f92212bSJohannes Berg pending_request->initiator == NL80211_REGDOM_SET_BY_DRIVER) { 1461458f4f9eSJohannes Berg regd = reg_copy_regd(get_cfg80211_regdom()); 1462e9763c3cSJohannes Berg if (IS_ERR(regd)) { 1463d951c1ddSLuis R. Rodriguez kfree(pending_request); 14642f92212bSJohannes Berg return REG_REQ_IGNORE; 1465d951c1ddSLuis R. Rodriguez } 14662f92212bSJohannes Berg treatment = REG_REQ_ALREADY_SET; 1467458f4f9eSJohannes Berg rcu_assign_pointer(wiphy->regd, regd); 14683e0c3ff3SLuis R. Rodriguez goto new_request; 14693e0c3ff3SLuis R. Rodriguez } 1470d951c1ddSLuis R. Rodriguez kfree(pending_request); 14712f92212bSJohannes Berg return treatment; 14723e0c3ff3SLuis R. Rodriguez } 1473b2e1b302SLuis R. Rodriguez 14743e0c3ff3SLuis R. Rodriguez new_request: 1475a042994dSLuis R. Rodriguez if (last_request != &core_request_world) 1476f6037d09SJohannes Berg kfree(last_request); 1477d951c1ddSLuis R. Rodriguez 1478d951c1ddSLuis R. Rodriguez last_request = pending_request; 1479d951c1ddSLuis R. Rodriguez last_request->intersect = intersect; 14806913b49aSJohannes Berg last_request->processed = false; 1481d951c1ddSLuis R. Rodriguez 1482d951c1ddSLuis R. Rodriguez pending_request = NULL; 14833e0c3ff3SLuis R. Rodriguez 148409d989d1SLuis R. Rodriguez if (last_request->initiator == NL80211_REGDOM_SET_BY_USER) { 148509d989d1SLuis R. Rodriguez user_alpha2[0] = last_request->alpha2[0]; 148609d989d1SLuis R. Rodriguez user_alpha2[1] = last_request->alpha2[1]; 148709d989d1SLuis R. Rodriguez } 148809d989d1SLuis R. Rodriguez 14892f92212bSJohannes Berg /* When r == REG_REQ_INTERSECT we do need to call CRDA */ 14902f92212bSJohannes Berg if (treatment != REG_REQ_OK && treatment != REG_REQ_INTERSECT) { 149173d54c9eSLuis R. Rodriguez /* 149273d54c9eSLuis R. Rodriguez * Since CRDA will not be called in this case as we already 149373d54c9eSLuis R. Rodriguez * have applied the requested regulatory domain before we just 149473d54c9eSLuis R. Rodriguez * inform userspace we have processed the request 149573d54c9eSLuis R. Rodriguez */ 14962f92212bSJohannes Berg if (treatment == REG_REQ_ALREADY_SET) { 149773d54c9eSLuis R. Rodriguez nl80211_send_reg_change_event(last_request); 1498b2e253cfSLuis R. Rodriguez reg_set_request_processed(); 1499b2e253cfSLuis R. Rodriguez } 15002f92212bSJohannes Berg return treatment; 150173d54c9eSLuis R. Rodriguez } 15023e0c3ff3SLuis R. Rodriguez 15032f92212bSJohannes Berg if (call_crda(last_request->alpha2)) 15042f92212bSJohannes Berg return REG_REQ_IGNORE; 15052f92212bSJohannes Berg return REG_REQ_OK; 1506b2e1b302SLuis R. Rodriguez } 1507b2e1b302SLuis R. Rodriguez 150830a548c7SLuis R. Rodriguez /* This processes *all* regulatory hints */ 15098848bef0SLuis R. Rodriguez static void reg_process_hint(struct regulatory_request *reg_request, 15108848bef0SLuis R. Rodriguez enum nl80211_reg_initiator reg_initiator) 1511fe33eb39SLuis R. Rodriguez { 1512fe33eb39SLuis R. Rodriguez struct wiphy *wiphy = NULL; 1513fe33eb39SLuis R. Rodriguez 1514fdc9d7b2SJohannes Berg if (WARN_ON(!reg_request->alpha2)) 1515fdc9d7b2SJohannes Berg return; 1516fe33eb39SLuis R. Rodriguez 1517f4173766SJohannes Berg if (reg_request->wiphy_idx != WIPHY_IDX_INVALID) 1518fe33eb39SLuis R. Rodriguez wiphy = wiphy_idx_to_wiphy(reg_request->wiphy_idx); 1519fe33eb39SLuis R. Rodriguez 15201a919318SJohannes Berg if (reg_initiator == NL80211_REGDOM_SET_BY_DRIVER && !wiphy) { 1521d951c1ddSLuis R. Rodriguez kfree(reg_request); 1522b0e2880bSLuis R. Rodriguez return; 1523fe33eb39SLuis R. Rodriguez } 1524fe33eb39SLuis R. Rodriguez 15252f92212bSJohannes Berg switch (__regulatory_hint(wiphy, reg_request)) { 15262f92212bSJohannes Berg case REG_REQ_ALREADY_SET: 1527fe33eb39SLuis R. Rodriguez /* This is required so that the orig_* parameters are saved */ 15282f92212bSJohannes Berg if (wiphy && wiphy->flags & WIPHY_FLAG_STRICT_REGULATORY) 15298848bef0SLuis R. Rodriguez wiphy_update_regulatory(wiphy, reg_initiator); 15302f92212bSJohannes Berg break; 15312f92212bSJohannes Berg default: 15322f92212bSJohannes Berg if (reg_initiator == NL80211_REGDOM_SET_BY_USER) 15332f92212bSJohannes Berg schedule_delayed_work(®_timeout, 15342f92212bSJohannes Berg msecs_to_jiffies(3142)); 15352f92212bSJohannes Berg break; 1536a90c7a31SLuis R. Rodriguez } 1537fe33eb39SLuis R. Rodriguez } 1538fe33eb39SLuis R. Rodriguez 1539b2e253cfSLuis R. Rodriguez /* 1540b2e253cfSLuis R. Rodriguez * Processes regulatory hints, this is all the NL80211_REGDOM_SET_BY_* 1541b2e253cfSLuis R. Rodriguez * Regulatory hints come on a first come first serve basis and we 1542b2e253cfSLuis R. Rodriguez * must process each one atomically. 1543b2e253cfSLuis R. Rodriguez */ 1544fe33eb39SLuis R. Rodriguez static void reg_process_pending_hints(void) 1545fe33eb39SLuis R. Rodriguez { 1546fe33eb39SLuis R. Rodriguez struct regulatory_request *reg_request; 1547fe33eb39SLuis R. Rodriguez 1548b0e2880bSLuis R. Rodriguez mutex_lock(&cfg80211_mutex); 1549b0e2880bSLuis R. Rodriguez mutex_lock(®_mutex); 1550b0e2880bSLuis R. Rodriguez 1551b2e253cfSLuis R. Rodriguez /* When last_request->processed becomes true this will be rescheduled */ 1552b2e253cfSLuis R. Rodriguez if (last_request && !last_request->processed) { 15531a919318SJohannes Berg REG_DBG_PRINT("Pending regulatory request, waiting for it to be processed...\n"); 1554b2e253cfSLuis R. Rodriguez goto out; 1555b2e253cfSLuis R. Rodriguez } 1556b2e253cfSLuis R. Rodriguez 1557fe33eb39SLuis R. Rodriguez spin_lock(®_requests_lock); 1558b2e253cfSLuis R. Rodriguez 1559b2e253cfSLuis R. Rodriguez if (list_empty(®_requests_list)) { 1560b2e253cfSLuis R. Rodriguez spin_unlock(®_requests_lock); 1561b2e253cfSLuis R. Rodriguez goto out; 1562b2e253cfSLuis R. Rodriguez } 1563b2e253cfSLuis R. Rodriguez 1564fe33eb39SLuis R. Rodriguez reg_request = list_first_entry(®_requests_list, 1565fe33eb39SLuis R. Rodriguez struct regulatory_request, 1566fe33eb39SLuis R. Rodriguez list); 1567fe33eb39SLuis R. Rodriguez list_del_init(®_request->list); 1568fe33eb39SLuis R. Rodriguez 1569d951c1ddSLuis R. Rodriguez spin_unlock(®_requests_lock); 1570b0e2880bSLuis R. Rodriguez 15718848bef0SLuis R. Rodriguez reg_process_hint(reg_request, reg_request->initiator); 1572b2e253cfSLuis R. Rodriguez 1573b2e253cfSLuis R. Rodriguez out: 1574b0e2880bSLuis R. Rodriguez mutex_unlock(®_mutex); 1575b0e2880bSLuis R. Rodriguez mutex_unlock(&cfg80211_mutex); 1576fe33eb39SLuis R. Rodriguez } 1577fe33eb39SLuis R. Rodriguez 1578e38f8a7aSLuis R. Rodriguez /* Processes beacon hints -- this has nothing to do with country IEs */ 1579e38f8a7aSLuis R. Rodriguez static void reg_process_pending_beacon_hints(void) 1580e38f8a7aSLuis R. Rodriguez { 158179c97e97SJohannes Berg struct cfg80211_registered_device *rdev; 1582e38f8a7aSLuis R. Rodriguez struct reg_beacon *pending_beacon, *tmp; 1583e38f8a7aSLuis R. Rodriguez 1584abc7381bSLuis R. Rodriguez /* 1585abc7381bSLuis R. Rodriguez * No need to hold the reg_mutex here as we just touch wiphys 1586abc7381bSLuis R. Rodriguez * and do not read or access regulatory variables. 1587abc7381bSLuis R. Rodriguez */ 1588e38f8a7aSLuis R. Rodriguez mutex_lock(&cfg80211_mutex); 1589e38f8a7aSLuis R. Rodriguez 1590e38f8a7aSLuis R. Rodriguez /* This goes through the _pending_ beacon list */ 1591e38f8a7aSLuis R. Rodriguez spin_lock_bh(®_pending_beacons_lock); 1592e38f8a7aSLuis R. Rodriguez 1593e38f8a7aSLuis R. Rodriguez list_for_each_entry_safe(pending_beacon, tmp, 1594e38f8a7aSLuis R. Rodriguez ®_pending_beacons, list) { 1595e38f8a7aSLuis R. Rodriguez list_del_init(&pending_beacon->list); 1596e38f8a7aSLuis R. Rodriguez 1597e38f8a7aSLuis R. Rodriguez /* Applies the beacon hint to current wiphys */ 159879c97e97SJohannes Berg list_for_each_entry(rdev, &cfg80211_rdev_list, list) 159979c97e97SJohannes Berg wiphy_update_new_beacon(&rdev->wiphy, pending_beacon); 1600e38f8a7aSLuis R. Rodriguez 1601e38f8a7aSLuis R. Rodriguez /* Remembers the beacon hint for new wiphys or reg changes */ 1602e38f8a7aSLuis R. Rodriguez list_add_tail(&pending_beacon->list, ®_beacon_list); 1603e38f8a7aSLuis R. Rodriguez } 1604e38f8a7aSLuis R. Rodriguez 1605e38f8a7aSLuis R. Rodriguez spin_unlock_bh(®_pending_beacons_lock); 1606e38f8a7aSLuis R. Rodriguez mutex_unlock(&cfg80211_mutex); 1607e38f8a7aSLuis R. Rodriguez } 1608e38f8a7aSLuis R. Rodriguez 1609fe33eb39SLuis R. Rodriguez static void reg_todo(struct work_struct *work) 1610fe33eb39SLuis R. Rodriguez { 1611fe33eb39SLuis R. Rodriguez reg_process_pending_hints(); 1612e38f8a7aSLuis R. Rodriguez reg_process_pending_beacon_hints(); 1613fe33eb39SLuis R. Rodriguez } 1614fe33eb39SLuis R. Rodriguez 1615fe33eb39SLuis R. Rodriguez static void queue_regulatory_request(struct regulatory_request *request) 1616fe33eb39SLuis R. Rodriguez { 1617c61029c7SJohn W. Linville request->alpha2[0] = toupper(request->alpha2[0]); 1618c61029c7SJohn W. Linville request->alpha2[1] = toupper(request->alpha2[1]); 1619c61029c7SJohn W. Linville 1620fe33eb39SLuis R. Rodriguez spin_lock(®_requests_lock); 1621fe33eb39SLuis R. Rodriguez list_add_tail(&request->list, ®_requests_list); 1622fe33eb39SLuis R. Rodriguez spin_unlock(®_requests_lock); 1623fe33eb39SLuis R. Rodriguez 1624fe33eb39SLuis R. Rodriguez schedule_work(®_work); 1625fe33eb39SLuis R. Rodriguez } 1626fe33eb39SLuis R. Rodriguez 162709d989d1SLuis R. Rodriguez /* 162809d989d1SLuis R. Rodriguez * Core regulatory hint -- happens during cfg80211_init() 162909d989d1SLuis R. Rodriguez * and when we restore regulatory settings. 163009d989d1SLuis R. Rodriguez */ 1631ba25c141SLuis R. Rodriguez static int regulatory_hint_core(const char *alpha2) 1632ba25c141SLuis R. Rodriguez { 1633ba25c141SLuis R. Rodriguez struct regulatory_request *request; 1634ba25c141SLuis R. Rodriguez 16351a919318SJohannes Berg request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); 1636ba25c141SLuis R. Rodriguez if (!request) 1637ba25c141SLuis R. Rodriguez return -ENOMEM; 1638ba25c141SLuis R. Rodriguez 1639ba25c141SLuis R. Rodriguez request->alpha2[0] = alpha2[0]; 1640ba25c141SLuis R. Rodriguez request->alpha2[1] = alpha2[1]; 16417db90f4aSLuis R. Rodriguez request->initiator = NL80211_REGDOM_SET_BY_CORE; 1642ba25c141SLuis R. Rodriguez 164331e99729SLuis R. Rodriguez queue_regulatory_request(request); 16445078b2e3SLuis R. Rodriguez 1645fe33eb39SLuis R. Rodriguez return 0; 1646ba25c141SLuis R. Rodriguez } 1647ba25c141SLuis R. Rodriguez 1648fe33eb39SLuis R. Rodriguez /* User hints */ 164957b5ce07SLuis R. Rodriguez int regulatory_hint_user(const char *alpha2, 165057b5ce07SLuis R. Rodriguez enum nl80211_user_reg_hint_type user_reg_hint_type) 1651b2e1b302SLuis R. Rodriguez { 1652fe33eb39SLuis R. Rodriguez struct regulatory_request *request; 1653fe33eb39SLuis R. Rodriguez 1654fdc9d7b2SJohannes Berg if (WARN_ON(!alpha2)) 1655fdc9d7b2SJohannes Berg return -EINVAL; 1656b2e1b302SLuis R. Rodriguez 1657fe33eb39SLuis R. Rodriguez request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); 1658fe33eb39SLuis R. Rodriguez if (!request) 1659fe33eb39SLuis R. Rodriguez return -ENOMEM; 1660fe33eb39SLuis R. Rodriguez 1661f4173766SJohannes Berg request->wiphy_idx = WIPHY_IDX_INVALID; 1662fe33eb39SLuis R. Rodriguez request->alpha2[0] = alpha2[0]; 1663fe33eb39SLuis R. Rodriguez request->alpha2[1] = alpha2[1]; 1664e12822e1SLuis R. Rodriguez request->initiator = NL80211_REGDOM_SET_BY_USER; 166557b5ce07SLuis R. Rodriguez request->user_reg_hint_type = user_reg_hint_type; 1666fe33eb39SLuis R. Rodriguez 1667fe33eb39SLuis R. Rodriguez queue_regulatory_request(request); 1668fe33eb39SLuis R. Rodriguez 1669fe33eb39SLuis R. Rodriguez return 0; 1670fe33eb39SLuis R. Rodriguez } 1671fe33eb39SLuis R. Rodriguez 1672fe33eb39SLuis R. Rodriguez /* Driver hints */ 1673fe33eb39SLuis R. Rodriguez int regulatory_hint(struct wiphy *wiphy, const char *alpha2) 1674fe33eb39SLuis R. Rodriguez { 1675fe33eb39SLuis R. Rodriguez struct regulatory_request *request; 1676fe33eb39SLuis R. Rodriguez 1677fdc9d7b2SJohannes Berg if (WARN_ON(!alpha2 || !wiphy)) 1678fdc9d7b2SJohannes Berg return -EINVAL; 1679fe33eb39SLuis R. Rodriguez 1680fe33eb39SLuis R. Rodriguez request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); 1681fe33eb39SLuis R. Rodriguez if (!request) 1682fe33eb39SLuis R. Rodriguez return -ENOMEM; 1683fe33eb39SLuis R. Rodriguez 1684fe33eb39SLuis R. Rodriguez request->wiphy_idx = get_wiphy_idx(wiphy); 1685fe33eb39SLuis R. Rodriguez 1686fe33eb39SLuis R. Rodriguez request->alpha2[0] = alpha2[0]; 1687fe33eb39SLuis R. Rodriguez request->alpha2[1] = alpha2[1]; 16887db90f4aSLuis R. Rodriguez request->initiator = NL80211_REGDOM_SET_BY_DRIVER; 1689fe33eb39SLuis R. Rodriguez 1690fe33eb39SLuis R. Rodriguez queue_regulatory_request(request); 1691fe33eb39SLuis R. Rodriguez 1692fe33eb39SLuis R. Rodriguez return 0; 1693b2e1b302SLuis R. Rodriguez } 1694b2e1b302SLuis R. Rodriguez EXPORT_SYMBOL(regulatory_hint); 1695b2e1b302SLuis R. Rodriguez 16964b44c8bcSLuis R. Rodriguez /* 16974b44c8bcSLuis R. Rodriguez * We hold wdev_lock() here so we cannot hold cfg80211_mutex() and 16984b44c8bcSLuis R. Rodriguez * therefore cannot iterate over the rdev list here. 16994b44c8bcSLuis R. Rodriguez */ 17001a919318SJohannes Berg void regulatory_hint_11d(struct wiphy *wiphy, enum ieee80211_band band, 17011a919318SJohannes Berg const u8 *country_ie, u8 country_ie_len) 17023f2355cbSLuis R. Rodriguez { 17033f2355cbSLuis R. Rodriguez char alpha2[2]; 17043f2355cbSLuis R. Rodriguez enum environment_cap env = ENVIRON_ANY; 1705fe33eb39SLuis R. Rodriguez struct regulatory_request *request; 17063f2355cbSLuis R. Rodriguez 1707abc7381bSLuis R. Rodriguez mutex_lock(®_mutex); 17083f2355cbSLuis R. Rodriguez 17099828b017SLuis R. Rodriguez if (unlikely(!last_request)) 17109828b017SLuis R. Rodriguez goto out; 1711d335fe63SLuis R. Rodriguez 17123f2355cbSLuis R. Rodriguez /* IE len must be evenly divisible by 2 */ 17133f2355cbSLuis R. Rodriguez if (country_ie_len & 0x01) 17143f2355cbSLuis R. Rodriguez goto out; 17153f2355cbSLuis R. Rodriguez 17163f2355cbSLuis R. Rodriguez if (country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN) 17173f2355cbSLuis R. Rodriguez goto out; 17183f2355cbSLuis R. Rodriguez 17193f2355cbSLuis R. Rodriguez alpha2[0] = country_ie[0]; 17203f2355cbSLuis R. Rodriguez alpha2[1] = country_ie[1]; 17213f2355cbSLuis R. Rodriguez 17223f2355cbSLuis R. Rodriguez if (country_ie[2] == 'I') 17233f2355cbSLuis R. Rodriguez env = ENVIRON_INDOOR; 17243f2355cbSLuis R. Rodriguez else if (country_ie[2] == 'O') 17253f2355cbSLuis R. Rodriguez env = ENVIRON_OUTDOOR; 17263f2355cbSLuis R. Rodriguez 1727fb1fc7adSLuis R. Rodriguez /* 17288b19e6caSLuis R. Rodriguez * We will run this only upon a successful connection on cfg80211. 17294b44c8bcSLuis R. Rodriguez * We leave conflict resolution to the workqueue, where can hold 17304b44c8bcSLuis R. Rodriguez * cfg80211_mutex. 1731fb1fc7adSLuis R. Rodriguez */ 1732f4173766SJohannes Berg if (last_request->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE && 1733f4173766SJohannes Berg last_request->wiphy_idx != WIPHY_IDX_INVALID) 17343f2355cbSLuis R. Rodriguez goto out; 17353f2355cbSLuis R. Rodriguez 1736fe33eb39SLuis R. Rodriguez request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); 1737fe33eb39SLuis R. Rodriguez if (!request) 1738f9f9b6e3SDan Carpenter goto out; 1739fe33eb39SLuis R. Rodriguez 1740fe33eb39SLuis R. Rodriguez request->wiphy_idx = get_wiphy_idx(wiphy); 17414f366c5dSJohn W. Linville request->alpha2[0] = alpha2[0]; 17424f366c5dSJohn W. Linville request->alpha2[1] = alpha2[1]; 17437db90f4aSLuis R. Rodriguez request->initiator = NL80211_REGDOM_SET_BY_COUNTRY_IE; 1744fe33eb39SLuis R. Rodriguez request->country_ie_env = env; 17453f2355cbSLuis R. Rodriguez 1746fe33eb39SLuis R. Rodriguez queue_regulatory_request(request); 17473f2355cbSLuis R. Rodriguez out: 1748abc7381bSLuis R. Rodriguez mutex_unlock(®_mutex); 17493f2355cbSLuis R. Rodriguez } 1750b2e1b302SLuis R. Rodriguez 175109d989d1SLuis R. Rodriguez static void restore_alpha2(char *alpha2, bool reset_user) 175209d989d1SLuis R. Rodriguez { 175309d989d1SLuis R. Rodriguez /* indicates there is no alpha2 to consider for restoration */ 175409d989d1SLuis R. Rodriguez alpha2[0] = '9'; 175509d989d1SLuis R. Rodriguez alpha2[1] = '7'; 175609d989d1SLuis R. Rodriguez 175709d989d1SLuis R. Rodriguez /* The user setting has precedence over the module parameter */ 175809d989d1SLuis R. Rodriguez if (is_user_regdom_saved()) { 175909d989d1SLuis R. Rodriguez /* Unless we're asked to ignore it and reset it */ 176009d989d1SLuis R. Rodriguez if (reset_user) { 17611a919318SJohannes Berg REG_DBG_PRINT("Restoring regulatory settings including user preference\n"); 176209d989d1SLuis R. Rodriguez user_alpha2[0] = '9'; 176309d989d1SLuis R. Rodriguez user_alpha2[1] = '7'; 176409d989d1SLuis R. Rodriguez 176509d989d1SLuis R. Rodriguez /* 176609d989d1SLuis R. Rodriguez * If we're ignoring user settings, we still need to 176709d989d1SLuis R. Rodriguez * check the module parameter to ensure we put things 176809d989d1SLuis R. Rodriguez * back as they were for a full restore. 176909d989d1SLuis R. Rodriguez */ 177009d989d1SLuis R. Rodriguez if (!is_world_regdom(ieee80211_regdom)) { 17711a919318SJohannes Berg REG_DBG_PRINT("Keeping preference on module parameter ieee80211_regdom: %c%c\n", 17721a919318SJohannes Berg ieee80211_regdom[0], ieee80211_regdom[1]); 177309d989d1SLuis R. Rodriguez alpha2[0] = ieee80211_regdom[0]; 177409d989d1SLuis R. Rodriguez alpha2[1] = ieee80211_regdom[1]; 177509d989d1SLuis R. Rodriguez } 177609d989d1SLuis R. Rodriguez } else { 17771a919318SJohannes Berg REG_DBG_PRINT("Restoring regulatory settings while preserving user preference for: %c%c\n", 17781a919318SJohannes Berg user_alpha2[0], user_alpha2[1]); 177909d989d1SLuis R. Rodriguez alpha2[0] = user_alpha2[0]; 178009d989d1SLuis R. Rodriguez alpha2[1] = user_alpha2[1]; 178109d989d1SLuis R. Rodriguez } 178209d989d1SLuis R. Rodriguez } else if (!is_world_regdom(ieee80211_regdom)) { 17831a919318SJohannes Berg REG_DBG_PRINT("Keeping preference on module parameter ieee80211_regdom: %c%c\n", 17841a919318SJohannes Berg ieee80211_regdom[0], ieee80211_regdom[1]); 178509d989d1SLuis R. Rodriguez alpha2[0] = ieee80211_regdom[0]; 178609d989d1SLuis R. Rodriguez alpha2[1] = ieee80211_regdom[1]; 178709d989d1SLuis R. Rodriguez } else 1788d91e41b6SLuis R. Rodriguez REG_DBG_PRINT("Restoring regulatory settings\n"); 178909d989d1SLuis R. Rodriguez } 179009d989d1SLuis R. Rodriguez 17915ce543d1SRajkumar Manoharan static void restore_custom_reg_settings(struct wiphy *wiphy) 17925ce543d1SRajkumar Manoharan { 17935ce543d1SRajkumar Manoharan struct ieee80211_supported_band *sband; 17945ce543d1SRajkumar Manoharan enum ieee80211_band band; 17955ce543d1SRajkumar Manoharan struct ieee80211_channel *chan; 17965ce543d1SRajkumar Manoharan int i; 17975ce543d1SRajkumar Manoharan 17985ce543d1SRajkumar Manoharan for (band = 0; band < IEEE80211_NUM_BANDS; band++) { 17995ce543d1SRajkumar Manoharan sband = wiphy->bands[band]; 18005ce543d1SRajkumar Manoharan if (!sband) 18015ce543d1SRajkumar Manoharan continue; 18025ce543d1SRajkumar Manoharan for (i = 0; i < sband->n_channels; i++) { 18035ce543d1SRajkumar Manoharan chan = &sband->channels[i]; 18045ce543d1SRajkumar Manoharan chan->flags = chan->orig_flags; 18055ce543d1SRajkumar Manoharan chan->max_antenna_gain = chan->orig_mag; 18065ce543d1SRajkumar Manoharan chan->max_power = chan->orig_mpwr; 1807899852afSPaul Stewart chan->beacon_found = false; 18085ce543d1SRajkumar Manoharan } 18095ce543d1SRajkumar Manoharan } 18105ce543d1SRajkumar Manoharan } 18115ce543d1SRajkumar Manoharan 181209d989d1SLuis R. Rodriguez /* 181309d989d1SLuis R. Rodriguez * Restoring regulatory settings involves ingoring any 181409d989d1SLuis R. Rodriguez * possibly stale country IE information and user regulatory 181509d989d1SLuis R. Rodriguez * settings if so desired, this includes any beacon hints 181609d989d1SLuis R. Rodriguez * learned as we could have traveled outside to another country 181709d989d1SLuis R. Rodriguez * after disconnection. To restore regulatory settings we do 181809d989d1SLuis R. Rodriguez * exactly what we did at bootup: 181909d989d1SLuis R. Rodriguez * 182009d989d1SLuis R. Rodriguez * - send a core regulatory hint 182109d989d1SLuis R. Rodriguez * - send a user regulatory hint if applicable 182209d989d1SLuis R. Rodriguez * 182309d989d1SLuis R. Rodriguez * Device drivers that send a regulatory hint for a specific country 182409d989d1SLuis R. Rodriguez * keep their own regulatory domain on wiphy->regd so that does does 182509d989d1SLuis R. Rodriguez * not need to be remembered. 182609d989d1SLuis R. Rodriguez */ 182709d989d1SLuis R. Rodriguez static void restore_regulatory_settings(bool reset_user) 182809d989d1SLuis R. Rodriguez { 182909d989d1SLuis R. Rodriguez char alpha2[2]; 1830cee0bec5SDmitry Shmidt char world_alpha2[2]; 183109d989d1SLuis R. Rodriguez struct reg_beacon *reg_beacon, *btmp; 183214609555SLuis R. Rodriguez struct regulatory_request *reg_request, *tmp; 183314609555SLuis R. Rodriguez LIST_HEAD(tmp_reg_req_list); 18345ce543d1SRajkumar Manoharan struct cfg80211_registered_device *rdev; 183509d989d1SLuis R. Rodriguez 183609d989d1SLuis R. Rodriguez mutex_lock(&cfg80211_mutex); 183709d989d1SLuis R. Rodriguez mutex_lock(®_mutex); 183809d989d1SLuis R. Rodriguez 1839379b82f4SJohannes Berg reset_regdomains(true, cfg80211_world_regdom); 184009d989d1SLuis R. Rodriguez restore_alpha2(alpha2, reset_user); 184109d989d1SLuis R. Rodriguez 184214609555SLuis R. Rodriguez /* 184314609555SLuis R. Rodriguez * If there's any pending requests we simply 184414609555SLuis R. Rodriguez * stash them to a temporary pending queue and 184514609555SLuis R. Rodriguez * add then after we've restored regulatory 184614609555SLuis R. Rodriguez * settings. 184714609555SLuis R. Rodriguez */ 184814609555SLuis R. Rodriguez spin_lock(®_requests_lock); 1849fea9bcedSJohannes Berg list_for_each_entry_safe(reg_request, tmp, ®_requests_list, list) { 1850fea9bcedSJohannes Berg if (reg_request->initiator != NL80211_REGDOM_SET_BY_USER) 185114609555SLuis R. Rodriguez continue; 185200a9ac4cSWei Yongjun list_move_tail(®_request->list, &tmp_reg_req_list); 185314609555SLuis R. Rodriguez } 185414609555SLuis R. Rodriguez spin_unlock(®_requests_lock); 185514609555SLuis R. Rodriguez 185609d989d1SLuis R. Rodriguez /* Clear beacon hints */ 185709d989d1SLuis R. Rodriguez spin_lock_bh(®_pending_beacons_lock); 1858fea9bcedSJohannes Berg list_for_each_entry_safe(reg_beacon, btmp, ®_pending_beacons, list) { 185909d989d1SLuis R. Rodriguez list_del(®_beacon->list); 186009d989d1SLuis R. Rodriguez kfree(reg_beacon); 186109d989d1SLuis R. Rodriguez } 186209d989d1SLuis R. Rodriguez spin_unlock_bh(®_pending_beacons_lock); 186309d989d1SLuis R. Rodriguez 1864fea9bcedSJohannes Berg list_for_each_entry_safe(reg_beacon, btmp, ®_beacon_list, list) { 186509d989d1SLuis R. Rodriguez list_del(®_beacon->list); 186609d989d1SLuis R. Rodriguez kfree(reg_beacon); 186709d989d1SLuis R. Rodriguez } 186809d989d1SLuis R. Rodriguez 186909d989d1SLuis R. Rodriguez /* First restore to the basic regulatory settings */ 1870379b82f4SJohannes Berg world_alpha2[0] = cfg80211_world_regdom->alpha2[0]; 1871379b82f4SJohannes Berg world_alpha2[1] = cfg80211_world_regdom->alpha2[1]; 187209d989d1SLuis R. Rodriguez 18735ce543d1SRajkumar Manoharan list_for_each_entry(rdev, &cfg80211_rdev_list, list) { 18745ce543d1SRajkumar Manoharan if (rdev->wiphy.flags & WIPHY_FLAG_CUSTOM_REGULATORY) 18755ce543d1SRajkumar Manoharan restore_custom_reg_settings(&rdev->wiphy); 18765ce543d1SRajkumar Manoharan } 18775ce543d1SRajkumar Manoharan 1878cee0bec5SDmitry Shmidt regulatory_hint_core(world_alpha2); 187909d989d1SLuis R. Rodriguez 188009d989d1SLuis R. Rodriguez /* 188109d989d1SLuis R. Rodriguez * This restores the ieee80211_regdom module parameter 188209d989d1SLuis R. Rodriguez * preference or the last user requested regulatory 188309d989d1SLuis R. Rodriguez * settings, user regulatory settings takes precedence. 188409d989d1SLuis R. Rodriguez */ 188509d989d1SLuis R. Rodriguez if (is_an_alpha2(alpha2)) 188657b5ce07SLuis R. Rodriguez regulatory_hint_user(user_alpha2, NL80211_USER_REG_HINT_USER); 188709d989d1SLuis R. Rodriguez 188814609555SLuis R. Rodriguez spin_lock(®_requests_lock); 188911cff96cSJohannes Berg list_splice_tail_init(&tmp_reg_req_list, ®_requests_list); 189014609555SLuis R. Rodriguez spin_unlock(®_requests_lock); 189114609555SLuis R. Rodriguez 189214609555SLuis R. Rodriguez mutex_unlock(®_mutex); 189314609555SLuis R. Rodriguez mutex_unlock(&cfg80211_mutex); 189414609555SLuis R. Rodriguez 189514609555SLuis R. Rodriguez REG_DBG_PRINT("Kicking the queue\n"); 189614609555SLuis R. Rodriguez 189714609555SLuis R. Rodriguez schedule_work(®_work); 189814609555SLuis R. Rodriguez } 189909d989d1SLuis R. Rodriguez 190009d989d1SLuis R. Rodriguez void regulatory_hint_disconnect(void) 190109d989d1SLuis R. Rodriguez { 19021a919318SJohannes Berg REG_DBG_PRINT("All devices are disconnected, going to restore regulatory settings\n"); 190309d989d1SLuis R. Rodriguez restore_regulatory_settings(false); 190409d989d1SLuis R. Rodriguez } 190509d989d1SLuis R. Rodriguez 1906e38f8a7aSLuis R. Rodriguez static bool freq_is_chan_12_13_14(u16 freq) 1907e38f8a7aSLuis R. Rodriguez { 190859eb21a6SBruno Randolf if (freq == ieee80211_channel_to_frequency(12, IEEE80211_BAND_2GHZ) || 190959eb21a6SBruno Randolf freq == ieee80211_channel_to_frequency(13, IEEE80211_BAND_2GHZ) || 191059eb21a6SBruno Randolf freq == ieee80211_channel_to_frequency(14, IEEE80211_BAND_2GHZ)) 1911e38f8a7aSLuis R. Rodriguez return true; 1912e38f8a7aSLuis R. Rodriguez return false; 1913e38f8a7aSLuis R. Rodriguez } 1914e38f8a7aSLuis R. Rodriguez 1915e38f8a7aSLuis R. Rodriguez int regulatory_hint_found_beacon(struct wiphy *wiphy, 1916e38f8a7aSLuis R. Rodriguez struct ieee80211_channel *beacon_chan, 1917e38f8a7aSLuis R. Rodriguez gfp_t gfp) 1918e38f8a7aSLuis R. Rodriguez { 1919e38f8a7aSLuis R. Rodriguez struct reg_beacon *reg_beacon; 1920e38f8a7aSLuis R. Rodriguez 19211a919318SJohannes Berg if (beacon_chan->beacon_found || 19221a919318SJohannes Berg beacon_chan->flags & IEEE80211_CHAN_RADAR || 1923e38f8a7aSLuis R. Rodriguez (beacon_chan->band == IEEE80211_BAND_2GHZ && 19241a919318SJohannes Berg !freq_is_chan_12_13_14(beacon_chan->center_freq))) 1925e38f8a7aSLuis R. Rodriguez return 0; 1926e38f8a7aSLuis R. Rodriguez 1927e38f8a7aSLuis R. Rodriguez reg_beacon = kzalloc(sizeof(struct reg_beacon), gfp); 1928e38f8a7aSLuis R. Rodriguez if (!reg_beacon) 1929e38f8a7aSLuis R. Rodriguez return -ENOMEM; 1930e38f8a7aSLuis R. Rodriguez 19311a919318SJohannes Berg REG_DBG_PRINT("Found new beacon on frequency: %d MHz (Ch %d) on %s\n", 1932e38f8a7aSLuis R. Rodriguez beacon_chan->center_freq, 1933e38f8a7aSLuis R. Rodriguez ieee80211_frequency_to_channel(beacon_chan->center_freq), 1934e38f8a7aSLuis R. Rodriguez wiphy_name(wiphy)); 19354113f751SLuis R. Rodriguez 1936e38f8a7aSLuis R. Rodriguez memcpy(®_beacon->chan, beacon_chan, 1937e38f8a7aSLuis R. Rodriguez sizeof(struct ieee80211_channel)); 1938e38f8a7aSLuis R. Rodriguez 1939e38f8a7aSLuis R. Rodriguez /* 1940e38f8a7aSLuis R. Rodriguez * Since we can be called from BH or and non-BH context 1941e38f8a7aSLuis R. Rodriguez * we must use spin_lock_bh() 1942e38f8a7aSLuis R. Rodriguez */ 1943e38f8a7aSLuis R. Rodriguez spin_lock_bh(®_pending_beacons_lock); 1944e38f8a7aSLuis R. Rodriguez list_add_tail(®_beacon->list, ®_pending_beacons); 1945e38f8a7aSLuis R. Rodriguez spin_unlock_bh(®_pending_beacons_lock); 1946e38f8a7aSLuis R. Rodriguez 1947e38f8a7aSLuis R. Rodriguez schedule_work(®_work); 1948e38f8a7aSLuis R. Rodriguez 1949e38f8a7aSLuis R. Rodriguez return 0; 1950e38f8a7aSLuis R. Rodriguez } 1951e38f8a7aSLuis R. Rodriguez 1952a3d2eaf0SJohannes Berg static void print_rd_rules(const struct ieee80211_regdomain *rd) 1953b2e1b302SLuis R. Rodriguez { 1954b2e1b302SLuis R. Rodriguez unsigned int i; 1955a3d2eaf0SJohannes Berg const struct ieee80211_reg_rule *reg_rule = NULL; 1956a3d2eaf0SJohannes Berg const struct ieee80211_freq_range *freq_range = NULL; 1957a3d2eaf0SJohannes Berg const struct ieee80211_power_rule *power_rule = NULL; 1958b2e1b302SLuis R. Rodriguez 1959e9c0268fSJoe Perches pr_info(" (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)\n"); 1960b2e1b302SLuis R. Rodriguez 1961b2e1b302SLuis R. Rodriguez for (i = 0; i < rd->n_reg_rules; i++) { 1962b2e1b302SLuis R. Rodriguez reg_rule = &rd->reg_rules[i]; 1963b2e1b302SLuis R. Rodriguez freq_range = ®_rule->freq_range; 1964b2e1b302SLuis R. Rodriguez power_rule = ®_rule->power_rule; 1965b2e1b302SLuis R. Rodriguez 1966fb1fc7adSLuis R. Rodriguez /* 1967fb1fc7adSLuis R. Rodriguez * There may not be documentation for max antenna gain 1968fb1fc7adSLuis R. Rodriguez * in certain regions 1969fb1fc7adSLuis R. Rodriguez */ 1970b2e1b302SLuis R. Rodriguez if (power_rule->max_antenna_gain) 1971e9c0268fSJoe Perches pr_info(" (%d KHz - %d KHz @ %d KHz), (%d mBi, %d mBm)\n", 1972b2e1b302SLuis R. Rodriguez freq_range->start_freq_khz, 1973b2e1b302SLuis R. Rodriguez freq_range->end_freq_khz, 1974b2e1b302SLuis R. Rodriguez freq_range->max_bandwidth_khz, 1975b2e1b302SLuis R. Rodriguez power_rule->max_antenna_gain, 1976b2e1b302SLuis R. Rodriguez power_rule->max_eirp); 1977b2e1b302SLuis R. Rodriguez else 1978e9c0268fSJoe Perches pr_info(" (%d KHz - %d KHz @ %d KHz), (N/A, %d mBm)\n", 1979b2e1b302SLuis R. Rodriguez freq_range->start_freq_khz, 1980b2e1b302SLuis R. Rodriguez freq_range->end_freq_khz, 1981b2e1b302SLuis R. Rodriguez freq_range->max_bandwidth_khz, 1982b2e1b302SLuis R. Rodriguez power_rule->max_eirp); 1983b2e1b302SLuis R. Rodriguez } 1984b2e1b302SLuis R. Rodriguez } 1985b2e1b302SLuis R. Rodriguez 19868b60b078SLuis R. Rodriguez bool reg_supported_dfs_region(u8 dfs_region) 19878b60b078SLuis R. Rodriguez { 19888b60b078SLuis R. Rodriguez switch (dfs_region) { 19898b60b078SLuis R. Rodriguez case NL80211_DFS_UNSET: 19908b60b078SLuis R. Rodriguez case NL80211_DFS_FCC: 19918b60b078SLuis R. Rodriguez case NL80211_DFS_ETSI: 19928b60b078SLuis R. Rodriguez case NL80211_DFS_JP: 19938b60b078SLuis R. Rodriguez return true; 19948b60b078SLuis R. Rodriguez default: 19958b60b078SLuis R. Rodriguez REG_DBG_PRINT("Ignoring uknown DFS master region: %d\n", 19968b60b078SLuis R. Rodriguez dfs_region); 19978b60b078SLuis R. Rodriguez return false; 19988b60b078SLuis R. Rodriguez } 19998b60b078SLuis R. Rodriguez } 20008b60b078SLuis R. Rodriguez 20018b60b078SLuis R. Rodriguez static void print_dfs_region(u8 dfs_region) 20028b60b078SLuis R. Rodriguez { 20038b60b078SLuis R. Rodriguez if (!dfs_region) 20048b60b078SLuis R. Rodriguez return; 20058b60b078SLuis R. Rodriguez 20068b60b078SLuis R. Rodriguez switch (dfs_region) { 20078b60b078SLuis R. Rodriguez case NL80211_DFS_FCC: 20088b60b078SLuis R. Rodriguez pr_info(" DFS Master region FCC"); 20098b60b078SLuis R. Rodriguez break; 20108b60b078SLuis R. Rodriguez case NL80211_DFS_ETSI: 20118b60b078SLuis R. Rodriguez pr_info(" DFS Master region ETSI"); 20128b60b078SLuis R. Rodriguez break; 20138b60b078SLuis R. Rodriguez case NL80211_DFS_JP: 20148b60b078SLuis R. Rodriguez pr_info(" DFS Master region JP"); 20158b60b078SLuis R. Rodriguez break; 20168b60b078SLuis R. Rodriguez default: 20171a919318SJohannes Berg pr_info(" DFS Master region Unknown"); 20188b60b078SLuis R. Rodriguez break; 20198b60b078SLuis R. Rodriguez } 20208b60b078SLuis R. Rodriguez } 20218b60b078SLuis R. Rodriguez 2022a3d2eaf0SJohannes Berg static void print_regdomain(const struct ieee80211_regdomain *rd) 2023b2e1b302SLuis R. Rodriguez { 2024b2e1b302SLuis R. Rodriguez 20253f2355cbSLuis R. Rodriguez if (is_intersected_alpha2(rd->alpha2)) { 20267db90f4aSLuis R. Rodriguez if (last_request->initiator == 20277db90f4aSLuis R. Rodriguez NL80211_REGDOM_SET_BY_COUNTRY_IE) { 202879c97e97SJohannes Berg struct cfg80211_registered_device *rdev; 202979c97e97SJohannes Berg rdev = cfg80211_rdev_by_wiphy_idx( 2030806a9e39SLuis R. Rodriguez last_request->wiphy_idx); 203179c97e97SJohannes Berg if (rdev) { 2032e9c0268fSJoe Perches pr_info("Current regulatory domain updated by AP to: %c%c\n", 203379c97e97SJohannes Berg rdev->country_ie_alpha2[0], 203479c97e97SJohannes Berg rdev->country_ie_alpha2[1]); 20353f2355cbSLuis R. Rodriguez } else 2036e9c0268fSJoe Perches pr_info("Current regulatory domain intersected:\n"); 20373f2355cbSLuis R. Rodriguez } else 2038e9c0268fSJoe Perches pr_info("Current regulatory domain intersected:\n"); 20391a919318SJohannes Berg } else if (is_world_regdom(rd->alpha2)) { 2040e9c0268fSJoe Perches pr_info("World regulatory domain updated:\n"); 20411a919318SJohannes Berg } else { 2042b2e1b302SLuis R. Rodriguez if (is_unknown_alpha2(rd->alpha2)) 2043e9c0268fSJoe Perches pr_info("Regulatory domain changed to driver built-in settings (unknown country)\n"); 204457b5ce07SLuis R. Rodriguez else { 204557b5ce07SLuis R. Rodriguez if (reg_request_cell_base(last_request)) 20461a919318SJohannes Berg pr_info("Regulatory domain changed to country: %c%c by Cell Station\n", 2047b2e1b302SLuis R. Rodriguez rd->alpha2[0], rd->alpha2[1]); 204857b5ce07SLuis R. Rodriguez else 20491a919318SJohannes Berg pr_info("Regulatory domain changed to country: %c%c\n", 205057b5ce07SLuis R. Rodriguez rd->alpha2[0], rd->alpha2[1]); 205157b5ce07SLuis R. Rodriguez } 2052b2e1b302SLuis R. Rodriguez } 20531a919318SJohannes Berg 20548b60b078SLuis R. Rodriguez print_dfs_region(rd->dfs_region); 2055b2e1b302SLuis R. Rodriguez print_rd_rules(rd); 2056b2e1b302SLuis R. Rodriguez } 2057b2e1b302SLuis R. Rodriguez 20582df78167SJohannes Berg static void print_regdomain_info(const struct ieee80211_regdomain *rd) 2059b2e1b302SLuis R. Rodriguez { 2060e9c0268fSJoe Perches pr_info("Regulatory domain: %c%c\n", rd->alpha2[0], rd->alpha2[1]); 2061b2e1b302SLuis R. Rodriguez print_rd_rules(rd); 2062b2e1b302SLuis R. Rodriguez } 2063b2e1b302SLuis R. Rodriguez 2064d2372b31SJohannes Berg /* Takes ownership of rd only if it doesn't fail */ 2065a3d2eaf0SJohannes Berg static int __set_regdom(const struct ieee80211_regdomain *rd) 2066b2e1b302SLuis R. Rodriguez { 2067e9763c3cSJohannes Berg const struct ieee80211_regdomain *regd; 20689c96477dSLuis R. Rodriguez const struct ieee80211_regdomain *intersected_rd = NULL; 2069806a9e39SLuis R. Rodriguez struct wiphy *request_wiphy; 20706913b49aSJohannes Berg 2071b2e1b302SLuis R. Rodriguez /* Some basic sanity checks first */ 2072b2e1b302SLuis R. Rodriguez 2073458f4f9eSJohannes Berg assert_reg_lock(); 2074458f4f9eSJohannes Berg 20756913b49aSJohannes Berg if (!reg_is_valid_request(rd->alpha2)) 2076b2e1b302SLuis R. Rodriguez return -EINVAL; 20776913b49aSJohannes Berg 20786913b49aSJohannes Berg if (is_world_regdom(rd->alpha2)) { 2079b2e1b302SLuis R. Rodriguez update_world_regdomain(rd); 2080b2e1b302SLuis R. Rodriguez return 0; 2081b2e1b302SLuis R. Rodriguez } 2082b2e1b302SLuis R. Rodriguez 2083b2e1b302SLuis R. Rodriguez if (!is_alpha2_set(rd->alpha2) && !is_an_alpha2(rd->alpha2) && 2084b2e1b302SLuis R. Rodriguez !is_unknown_alpha2(rd->alpha2)) 2085b2e1b302SLuis R. Rodriguez return -EINVAL; 2086b2e1b302SLuis R. Rodriguez 2087fb1fc7adSLuis R. Rodriguez /* 2088fb1fc7adSLuis R. Rodriguez * Lets only bother proceeding on the same alpha2 if the current 20893f2355cbSLuis R. Rodriguez * rd is non static (it means CRDA was present and was used last) 2090fb1fc7adSLuis R. Rodriguez * and the pending request came in from a country IE 2091fb1fc7adSLuis R. Rodriguez */ 20927db90f4aSLuis R. Rodriguez if (last_request->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE) { 2093fb1fc7adSLuis R. Rodriguez /* 2094fb1fc7adSLuis R. Rodriguez * If someone else asked us to change the rd lets only bother 2095fb1fc7adSLuis R. Rodriguez * checking if the alpha2 changes if CRDA was already called 2096fb1fc7adSLuis R. Rodriguez */ 2097baeb66feSJohn W. Linville if (!regdom_changes(rd->alpha2)) 209895908535SKalle Valo return -EALREADY; 20993f2355cbSLuis R. Rodriguez } 21003f2355cbSLuis R. Rodriguez 2101fb1fc7adSLuis R. Rodriguez /* 2102fb1fc7adSLuis R. Rodriguez * Now lets set the regulatory domain, update all driver channels 2103b2e1b302SLuis R. Rodriguez * and finally inform them of what we have done, in case they want 2104b2e1b302SLuis R. Rodriguez * to review or adjust their own settings based on their own 2105fb1fc7adSLuis R. Rodriguez * internal EEPROM data 2106fb1fc7adSLuis R. Rodriguez */ 2107b2e1b302SLuis R. Rodriguez 2108b2e1b302SLuis R. Rodriguez if (!is_valid_rd(rd)) { 2109e9c0268fSJoe Perches pr_err("Invalid regulatory domain detected:\n"); 2110b2e1b302SLuis R. Rodriguez print_regdomain_info(rd); 2111b2e1b302SLuis R. Rodriguez return -EINVAL; 2112b2e1b302SLuis R. Rodriguez } 2113b2e1b302SLuis R. Rodriguez 2114806a9e39SLuis R. Rodriguez request_wiphy = wiphy_idx_to_wiphy(last_request->wiphy_idx); 21150bac71afSLuis R. Rodriguez if (!request_wiphy && 21160bac71afSLuis R. Rodriguez (last_request->initiator == NL80211_REGDOM_SET_BY_DRIVER || 21170bac71afSLuis R. Rodriguez last_request->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE)) { 21180bac71afSLuis R. Rodriguez schedule_delayed_work(®_timeout, 0); 2119de3584bdSJohannes Berg return -ENODEV; 2120de3584bdSJohannes Berg } 2121806a9e39SLuis R. Rodriguez 2122b8295acdSLuis R. Rodriguez if (!last_request->intersect) { 21237db90f4aSLuis R. Rodriguez if (last_request->initiator != NL80211_REGDOM_SET_BY_DRIVER) { 2124379b82f4SJohannes Berg reset_regdomains(false, rd); 21253e0c3ff3SLuis R. Rodriguez return 0; 21263e0c3ff3SLuis R. Rodriguez } 21273e0c3ff3SLuis R. Rodriguez 2128fb1fc7adSLuis R. Rodriguez /* 2129fb1fc7adSLuis R. Rodriguez * For a driver hint, lets copy the regulatory domain the 2130fb1fc7adSLuis R. Rodriguez * driver wanted to the wiphy to deal with conflicts 2131fb1fc7adSLuis R. Rodriguez */ 21323e0c3ff3SLuis R. Rodriguez 2133558f6d32SLuis R. Rodriguez /* 2134558f6d32SLuis R. Rodriguez * Userspace could have sent two replies with only 2135558f6d32SLuis R. Rodriguez * one kernel request. 2136558f6d32SLuis R. Rodriguez */ 2137558f6d32SLuis R. Rodriguez if (request_wiphy->regd) 2138558f6d32SLuis R. Rodriguez return -EALREADY; 21393e0c3ff3SLuis R. Rodriguez 2140e9763c3cSJohannes Berg regd = reg_copy_regd(rd); 2141e9763c3cSJohannes Berg if (IS_ERR(regd)) 2142e9763c3cSJohannes Berg return PTR_ERR(regd); 21433e0c3ff3SLuis R. Rodriguez 2144458f4f9eSJohannes Berg rcu_assign_pointer(request_wiphy->regd, regd); 2145379b82f4SJohannes Berg reset_regdomains(false, rd); 2146b8295acdSLuis R. Rodriguez return 0; 2147b8295acdSLuis R. Rodriguez } 2148b8295acdSLuis R. Rodriguez 2149b8295acdSLuis R. Rodriguez /* Intersection requires a bit more work */ 2150b8295acdSLuis R. Rodriguez 21517db90f4aSLuis R. Rodriguez if (last_request->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE) { 2152458f4f9eSJohannes Berg intersected_rd = regdom_intersect(rd, get_cfg80211_regdom()); 21539c96477dSLuis R. Rodriguez if (!intersected_rd) 21549c96477dSLuis R. Rodriguez return -EINVAL; 2155b8295acdSLuis R. Rodriguez 2156fb1fc7adSLuis R. Rodriguez /* 2157fb1fc7adSLuis R. Rodriguez * We can trash what CRDA provided now. 21583e0c3ff3SLuis R. Rodriguez * However if a driver requested this specific regulatory 2159fb1fc7adSLuis R. Rodriguez * domain we keep it for its private use 2160fb1fc7adSLuis R. Rodriguez */ 21617db90f4aSLuis R. Rodriguez if (last_request->initiator == NL80211_REGDOM_SET_BY_DRIVER) 2162458f4f9eSJohannes Berg rcu_assign_pointer(request_wiphy->regd, rd); 21633e0c3ff3SLuis R. Rodriguez else 21649c96477dSLuis R. Rodriguez kfree(rd); 21653e0c3ff3SLuis R. Rodriguez 2166b8295acdSLuis R. Rodriguez rd = NULL; 2167b8295acdSLuis R. Rodriguez 2168379b82f4SJohannes Berg reset_regdomains(false, intersected_rd); 2169b8295acdSLuis R. Rodriguez 2170b8295acdSLuis R. Rodriguez return 0; 21719c96477dSLuis R. Rodriguez } 21729c96477dSLuis R. Rodriguez 21733f2355cbSLuis R. Rodriguez return -EINVAL; 2174b2e1b302SLuis R. Rodriguez } 2175b2e1b302SLuis R. Rodriguez 2176b2e1b302SLuis R. Rodriguez 2177fb1fc7adSLuis R. Rodriguez /* 2178fb1fc7adSLuis R. Rodriguez * Use this call to set the current regulatory domain. Conflicts with 2179b2e1b302SLuis R. Rodriguez * multiple drivers can be ironed out later. Caller must've already 2180458f4f9eSJohannes Berg * kmalloc'd the rd structure. 2181fb1fc7adSLuis R. Rodriguez */ 2182a3d2eaf0SJohannes Berg int set_regdom(const struct ieee80211_regdomain *rd) 2183b2e1b302SLuis R. Rodriguez { 2184b2e1b302SLuis R. Rodriguez int r; 2185b2e1b302SLuis R. Rodriguez 2186abc7381bSLuis R. Rodriguez mutex_lock(®_mutex); 2187abc7381bSLuis R. Rodriguez 2188b2e1b302SLuis R. Rodriguez /* Note that this doesn't update the wiphys, this is done below */ 2189b2e1b302SLuis R. Rodriguez r = __set_regdom(rd); 2190d2372b31SJohannes Berg if (r) { 219195908535SKalle Valo if (r == -EALREADY) 219295908535SKalle Valo reg_set_request_processed(); 219395908535SKalle Valo 2194d2372b31SJohannes Berg kfree(rd); 2195fdc9d7b2SJohannes Berg goto out; 2196d2372b31SJohannes Berg } 2197b2e1b302SLuis R. Rodriguez 2198b2e1b302SLuis R. Rodriguez /* This would make this whole thing pointless */ 2199458f4f9eSJohannes Berg if (WARN_ON(!last_request->intersect && 2200458f4f9eSJohannes Berg rd != get_cfg80211_regdom())) { 2201fdc9d7b2SJohannes Berg r = -EINVAL; 2202fdc9d7b2SJohannes Berg goto out; 2203fdc9d7b2SJohannes Berg } 2204b2e1b302SLuis R. Rodriguez 2205b2e1b302SLuis R. Rodriguez /* update all wiphys now with the new established regulatory domain */ 2206f6037d09SJohannes Berg update_all_wiphy_regulatory(last_request->initiator); 2207b2e1b302SLuis R. Rodriguez 2208458f4f9eSJohannes Berg print_regdomain(get_cfg80211_regdom()); 2209b2e1b302SLuis R. Rodriguez 221073d54c9eSLuis R. Rodriguez nl80211_send_reg_change_event(last_request); 221173d54c9eSLuis R. Rodriguez 2212b2e253cfSLuis R. Rodriguez reg_set_request_processed(); 2213b2e253cfSLuis R. Rodriguez 2214fdc9d7b2SJohannes Berg out: 2215abc7381bSLuis R. Rodriguez mutex_unlock(®_mutex); 2216abc7381bSLuis R. Rodriguez 2217b2e1b302SLuis R. Rodriguez return r; 2218b2e1b302SLuis R. Rodriguez } 2219b2e1b302SLuis R. Rodriguez 22204d9d88d1SScott James Remnant #ifdef CONFIG_HOTPLUG 22214d9d88d1SScott James Remnant int reg_device_uevent(struct device *dev, struct kobj_uevent_env *env) 22224d9d88d1SScott James Remnant { 22234d9d88d1SScott James Remnant if (last_request && !last_request->processed) { 22244d9d88d1SScott James Remnant if (add_uevent_var(env, "COUNTRY=%c%c", 22254d9d88d1SScott James Remnant last_request->alpha2[0], 22264d9d88d1SScott James Remnant last_request->alpha2[1])) 22274d9d88d1SScott James Remnant return -ENOMEM; 22284d9d88d1SScott James Remnant } 22294d9d88d1SScott James Remnant 22304d9d88d1SScott James Remnant return 0; 22314d9d88d1SScott James Remnant } 22324d9d88d1SScott James Remnant #else 22334d9d88d1SScott James Remnant int reg_device_uevent(struct device *dev, struct kobj_uevent_env *env) 22344d9d88d1SScott James Remnant { 22354d9d88d1SScott James Remnant return -ENODEV; 22364d9d88d1SScott James Remnant } 22374d9d88d1SScott James Remnant #endif /* CONFIG_HOTPLUG */ 22384d9d88d1SScott James Remnant 223957b5ce07SLuis R. Rodriguez void wiphy_regulatory_register(struct wiphy *wiphy) 224057b5ce07SLuis R. Rodriguez { 224157b5ce07SLuis R. Rodriguez mutex_lock(®_mutex); 224257b5ce07SLuis R. Rodriguez 224357b5ce07SLuis R. Rodriguez if (!reg_dev_ignore_cell_hint(wiphy)) 224457b5ce07SLuis R. Rodriguez reg_num_devs_support_basehint++; 224557b5ce07SLuis R. Rodriguez 224614cdf112SLuis R. Rodriguez wiphy_update_regulatory(wiphy, NL80211_REGDOM_SET_BY_CORE); 2247f8a1c774SLuis R. Rodriguez 224814cdf112SLuis R. Rodriguez mutex_unlock(®_mutex); 224957b5ce07SLuis R. Rodriguez } 225057b5ce07SLuis R. Rodriguez 2251a1794390SLuis R. Rodriguez /* Caller must hold cfg80211_mutex */ 2252bfead080SLuis R. Rodriguez void wiphy_regulatory_deregister(struct wiphy *wiphy) 22533f2355cbSLuis R. Rodriguez { 22540ad8acafSLuis R. Rodriguez struct wiphy *request_wiphy = NULL; 2255806a9e39SLuis R. Rodriguez 2256abc7381bSLuis R. Rodriguez mutex_lock(®_mutex); 2257abc7381bSLuis R. Rodriguez 225857b5ce07SLuis R. Rodriguez if (!reg_dev_ignore_cell_hint(wiphy)) 225957b5ce07SLuis R. Rodriguez reg_num_devs_support_basehint--; 226057b5ce07SLuis R. Rodriguez 2261458f4f9eSJohannes Berg rcu_free_regdom(get_wiphy_regdom(wiphy)); 2262458f4f9eSJohannes Berg rcu_assign_pointer(wiphy->regd, NULL); 22630ef9ccddSChris Wright 22640ad8acafSLuis R. Rodriguez if (last_request) 2265806a9e39SLuis R. Rodriguez request_wiphy = wiphy_idx_to_wiphy(last_request->wiphy_idx); 2266806a9e39SLuis R. Rodriguez 22670ef9ccddSChris Wright if (!request_wiphy || request_wiphy != wiphy) 2268abc7381bSLuis R. Rodriguez goto out; 22690ef9ccddSChris Wright 2270f4173766SJohannes Berg last_request->wiphy_idx = WIPHY_IDX_INVALID; 22713f2355cbSLuis R. Rodriguez last_request->country_ie_env = ENVIRON_ANY; 2272abc7381bSLuis R. Rodriguez out: 2273abc7381bSLuis R. Rodriguez mutex_unlock(®_mutex); 22743f2355cbSLuis R. Rodriguez } 22753f2355cbSLuis R. Rodriguez 2276a90c7a31SLuis R. Rodriguez static void reg_timeout_work(struct work_struct *work) 2277a90c7a31SLuis R. Rodriguez { 22781a919318SJohannes Berg REG_DBG_PRINT("Timeout while waiting for CRDA to reply, restoring regulatory settings\n"); 2279a90c7a31SLuis R. Rodriguez restore_regulatory_settings(true); 2280a90c7a31SLuis R. Rodriguez } 2281a90c7a31SLuis R. Rodriguez 22822fcc9f73SUwe Kleine-König int __init regulatory_init(void) 2283b2e1b302SLuis R. Rodriguez { 2284bcf4f99bSLuis R. Rodriguez int err = 0; 2285734366deSJohannes Berg 2286b2e1b302SLuis R. Rodriguez reg_pdev = platform_device_register_simple("regulatory", 0, NULL, 0); 2287b2e1b302SLuis R. Rodriguez if (IS_ERR(reg_pdev)) 2288b2e1b302SLuis R. Rodriguez return PTR_ERR(reg_pdev); 2289734366deSJohannes Berg 22904d9d88d1SScott James Remnant reg_pdev->dev.type = ®_device_type; 22914d9d88d1SScott James Remnant 2292fe33eb39SLuis R. Rodriguez spin_lock_init(®_requests_lock); 2293e38f8a7aSLuis R. Rodriguez spin_lock_init(®_pending_beacons_lock); 2294fe33eb39SLuis R. Rodriguez 229580007efeSLuis R. Rodriguez reg_regdb_size_check(); 229680007efeSLuis R. Rodriguez 2297458f4f9eSJohannes Berg rcu_assign_pointer(cfg80211_regdomain, cfg80211_world_regdom); 2298734366deSJohannes Berg 229909d989d1SLuis R. Rodriguez user_alpha2[0] = '9'; 230009d989d1SLuis R. Rodriguez user_alpha2[1] = '7'; 230109d989d1SLuis R. Rodriguez 2302ae9e4b0dSLuis R. Rodriguez /* We always try to get an update for the static regdomain */ 2303458f4f9eSJohannes Berg err = regulatory_hint_core(cfg80211_world_regdom->alpha2); 2304bcf4f99bSLuis R. Rodriguez if (err) { 2305bcf4f99bSLuis R. Rodriguez if (err == -ENOMEM) 2306bcf4f99bSLuis R. Rodriguez return err; 2307bcf4f99bSLuis R. Rodriguez /* 2308bcf4f99bSLuis R. Rodriguez * N.B. kobject_uevent_env() can fail mainly for when we're out 2309bcf4f99bSLuis R. Rodriguez * memory which is handled and propagated appropriately above 2310bcf4f99bSLuis R. Rodriguez * but it can also fail during a netlink_broadcast() or during 2311bcf4f99bSLuis R. Rodriguez * early boot for call_usermodehelper(). For now treat these 2312bcf4f99bSLuis R. Rodriguez * errors as non-fatal. 2313bcf4f99bSLuis R. Rodriguez */ 2314e9c0268fSJoe Perches pr_err("kobject_uevent_env() was unable to call CRDA during init\n"); 2315bcf4f99bSLuis R. Rodriguez } 2316734366deSJohannes Berg 2317ae9e4b0dSLuis R. Rodriguez /* 2318ae9e4b0dSLuis R. Rodriguez * Finally, if the user set the module parameter treat it 2319ae9e4b0dSLuis R. Rodriguez * as a user hint. 2320ae9e4b0dSLuis R. Rodriguez */ 2321ae9e4b0dSLuis R. Rodriguez if (!is_world_regdom(ieee80211_regdom)) 232257b5ce07SLuis R. Rodriguez regulatory_hint_user(ieee80211_regdom, 232357b5ce07SLuis R. Rodriguez NL80211_USER_REG_HINT_USER); 2324ae9e4b0dSLuis R. Rodriguez 2325b2e1b302SLuis R. Rodriguez return 0; 2326b2e1b302SLuis R. Rodriguez } 2327b2e1b302SLuis R. Rodriguez 23281a919318SJohannes Berg void regulatory_exit(void) 2329b2e1b302SLuis R. Rodriguez { 2330fe33eb39SLuis R. Rodriguez struct regulatory_request *reg_request, *tmp; 2331e38f8a7aSLuis R. Rodriguez struct reg_beacon *reg_beacon, *btmp; 2332fe33eb39SLuis R. Rodriguez 2333fe33eb39SLuis R. Rodriguez cancel_work_sync(®_work); 2334a90c7a31SLuis R. Rodriguez cancel_delayed_work_sync(®_timeout); 2335fe33eb39SLuis R. Rodriguez 23369027b149SJohannes Berg /* Lock to suppress warnings */ 2337abc7381bSLuis R. Rodriguez mutex_lock(®_mutex); 2338379b82f4SJohannes Berg reset_regdomains(true, NULL); 23399027b149SJohannes Berg mutex_unlock(®_mutex); 2340734366deSJohannes Berg 234158ebacc6SLuis R. Rodriguez dev_set_uevent_suppress(®_pdev->dev, true); 2342f6037d09SJohannes Berg 2343b2e1b302SLuis R. Rodriguez platform_device_unregister(reg_pdev); 2344734366deSJohannes Berg 2345fea9bcedSJohannes Berg list_for_each_entry_safe(reg_beacon, btmp, ®_pending_beacons, list) { 2346e38f8a7aSLuis R. Rodriguez list_del(®_beacon->list); 2347e38f8a7aSLuis R. Rodriguez kfree(reg_beacon); 2348e38f8a7aSLuis R. Rodriguez } 2349e38f8a7aSLuis R. Rodriguez 2350fea9bcedSJohannes Berg list_for_each_entry_safe(reg_beacon, btmp, ®_beacon_list, list) { 2351e38f8a7aSLuis R. Rodriguez list_del(®_beacon->list); 2352e38f8a7aSLuis R. Rodriguez kfree(reg_beacon); 2353e38f8a7aSLuis R. Rodriguez } 2354e38f8a7aSLuis R. Rodriguez 2355fea9bcedSJohannes Berg list_for_each_entry_safe(reg_request, tmp, ®_requests_list, list) { 2356fe33eb39SLuis R. Rodriguez list_del(®_request->list); 2357fe33eb39SLuis R. Rodriguez kfree(reg_request); 2358fe33eb39SLuis R. Rodriguez } 23598318d78aSJohannes Berg } 2360