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> 5b2e1b302SLuis R. Rodriguez * Copyright 2008 Luis R. Rodriguez <lrodriguz@atheros.com> 68318d78aSJohannes Berg * 78318d78aSJohannes Berg * This program is free software; you can redistribute it and/or modify 88318d78aSJohannes Berg * it under the terms of the GNU General Public License version 2 as 98318d78aSJohannes Berg * published by the Free Software Foundation. 108318d78aSJohannes Berg */ 118318d78aSJohannes Berg 12b2e1b302SLuis R. Rodriguez /** 13b2e1b302SLuis R. Rodriguez * DOC: Wireless regulatory infrastructure 148318d78aSJohannes Berg * 158318d78aSJohannes Berg * The usual implementation is for a driver to read a device EEPROM to 168318d78aSJohannes Berg * determine which regulatory domain it should be operating under, then 178318d78aSJohannes Berg * looking up the allowable channels in a driver-local table and finally 188318d78aSJohannes Berg * registering those channels in the wiphy structure. 198318d78aSJohannes Berg * 20b2e1b302SLuis R. Rodriguez * Another set of compliance enforcement is for drivers to use their 21b2e1b302SLuis R. Rodriguez * own compliance limits which can be stored on the EEPROM. The host 22b2e1b302SLuis R. Rodriguez * driver or firmware may ensure these are used. 23b2e1b302SLuis R. Rodriguez * 24b2e1b302SLuis R. Rodriguez * In addition to all this we provide an extra layer of regulatory 25b2e1b302SLuis R. Rodriguez * conformance. For drivers which do not have any regulatory 26b2e1b302SLuis R. Rodriguez * information CRDA provides the complete regulatory solution. 27b2e1b302SLuis R. Rodriguez * For others it provides a community effort on further restrictions 28b2e1b302SLuis R. Rodriguez * to enhance compliance. 29b2e1b302SLuis R. Rodriguez * 30b2e1b302SLuis R. Rodriguez * Note: When number of rules --> infinity we will not be able to 31b2e1b302SLuis R. Rodriguez * index on alpha2 any more, instead we'll probably have to 32b2e1b302SLuis R. Rodriguez * rely on some SHA1 checksum of the regdomain for example. 33b2e1b302SLuis R. Rodriguez * 348318d78aSJohannes Berg */ 358318d78aSJohannes Berg #include <linux/kernel.h> 365a0e3ad6STejun Heo #include <linux/slab.h> 37b2e1b302SLuis R. Rodriguez #include <linux/list.h> 38b2e1b302SLuis R. Rodriguez #include <linux/random.h> 39b2e1b302SLuis R. Rodriguez #include <linux/nl80211.h> 40b2e1b302SLuis R. Rodriguez #include <linux/platform_device.h> 41b2e1b302SLuis R. Rodriguez #include <net/cfg80211.h> 428318d78aSJohannes Berg #include "core.h" 43b2e1b302SLuis R. Rodriguez #include "reg.h" 443b377ea9SJohn W. Linville #include "regdb.h" 4573d54c9eSLuis R. Rodriguez #include "nl80211.h" 468318d78aSJohannes Berg 474113f751SLuis R. Rodriguez #ifdef CONFIG_CFG80211_REG_DEBUG 488271195eSJohn W. Linville #define REG_DBG_PRINT(format, args...) \ 494113f751SLuis R. Rodriguez do { \ 508271195eSJohn W. Linville printk(KERN_DEBUG format , ## args); \ 514113f751SLuis R. Rodriguez } while (0) 524113f751SLuis R. Rodriguez #else 538271195eSJohn W. Linville #define REG_DBG_PRINT(args...) 544113f751SLuis R. Rodriguez #endif 554113f751SLuis R. Rodriguez 565166ccd2SLuis R. Rodriguez /* Receipt of information from last regulatory request */ 57f6037d09SJohannes Berg static struct regulatory_request *last_request; 58734366deSJohannes Berg 59b2e1b302SLuis R. Rodriguez /* To trigger userspace events */ 60b2e1b302SLuis R. Rodriguez static struct platform_device *reg_pdev; 618318d78aSJohannes Berg 62fb1fc7adSLuis R. Rodriguez /* 63fb1fc7adSLuis R. Rodriguez * Central wireless core regulatory domains, we only need two, 64734366deSJohannes Berg * the current one and a world regulatory domain in case we have no 65fb1fc7adSLuis R. Rodriguez * information to give us an alpha2 66fb1fc7adSLuis R. Rodriguez */ 67f130347cSLuis R. Rodriguez const struct ieee80211_regdomain *cfg80211_regdomain; 68734366deSJohannes Berg 69fb1fc7adSLuis R. Rodriguez /* 70abc7381bSLuis R. Rodriguez * Protects static reg.c components: 71abc7381bSLuis R. Rodriguez * - cfg80211_world_regdom 72abc7381bSLuis R. Rodriguez * - cfg80211_regdom 73abc7381bSLuis R. Rodriguez * - last_request 74abc7381bSLuis R. Rodriguez */ 75670b7f11SJohn W. Linville static DEFINE_MUTEX(reg_mutex); 76abc7381bSLuis R. Rodriguez #define assert_reg_lock() WARN_ON(!mutex_is_locked(®_mutex)) 77abc7381bSLuis R. Rodriguez 78e38f8a7aSLuis R. Rodriguez /* Used to queue up regulatory hints */ 79fe33eb39SLuis R. Rodriguez static LIST_HEAD(reg_requests_list); 80fe33eb39SLuis R. Rodriguez static spinlock_t reg_requests_lock; 81fe33eb39SLuis R. Rodriguez 82e38f8a7aSLuis R. Rodriguez /* Used to queue up beacon hints for review */ 83e38f8a7aSLuis R. Rodriguez static LIST_HEAD(reg_pending_beacons); 84e38f8a7aSLuis R. Rodriguez static spinlock_t reg_pending_beacons_lock; 85e38f8a7aSLuis R. Rodriguez 86e38f8a7aSLuis R. Rodriguez /* Used to keep track of processed beacon hints */ 87e38f8a7aSLuis R. Rodriguez static LIST_HEAD(reg_beacon_list); 88e38f8a7aSLuis R. Rodriguez 89e38f8a7aSLuis R. Rodriguez struct reg_beacon { 90e38f8a7aSLuis R. Rodriguez struct list_head list; 91e38f8a7aSLuis R. Rodriguez struct ieee80211_channel chan; 92e38f8a7aSLuis R. Rodriguez }; 93e38f8a7aSLuis R. Rodriguez 94734366deSJohannes Berg /* We keep a static world regulatory domain in case of the absence of CRDA */ 95734366deSJohannes Berg static const struct ieee80211_regdomain world_regdom = { 96611b6a82SLuis R. Rodriguez .n_reg_rules = 5, 97734366deSJohannes Berg .alpha2 = "00", 98734366deSJohannes Berg .reg_rules = { 9968798a62SLuis R. Rodriguez /* IEEE 802.11b/g, channels 1..11 */ 10068798a62SLuis R. Rodriguez REG_RULE(2412-10, 2462+10, 40, 6, 20, 0), 101611b6a82SLuis R. Rodriguez /* IEEE 802.11b/g, channels 12..13. No HT40 102611b6a82SLuis R. Rodriguez * channel fits here. */ 103611b6a82SLuis R. Rodriguez REG_RULE(2467-10, 2472+10, 20, 6, 20, 104611b6a82SLuis R. Rodriguez NL80211_RRF_PASSIVE_SCAN | 105611b6a82SLuis R. Rodriguez NL80211_RRF_NO_IBSS), 106611b6a82SLuis R. Rodriguez /* IEEE 802.11 channel 14 - Only JP enables 107611b6a82SLuis R. Rodriguez * this and for 802.11b only */ 108611b6a82SLuis R. Rodriguez REG_RULE(2484-10, 2484+10, 20, 6, 20, 109611b6a82SLuis R. Rodriguez NL80211_RRF_PASSIVE_SCAN | 110611b6a82SLuis R. Rodriguez NL80211_RRF_NO_IBSS | 111611b6a82SLuis R. Rodriguez NL80211_RRF_NO_OFDM), 1123fc71f77SLuis R. Rodriguez /* IEEE 802.11a, channel 36..48 */ 113ec329aceSLuis R. Rodriguez REG_RULE(5180-10, 5240+10, 40, 6, 20, 1143fc71f77SLuis R. Rodriguez NL80211_RRF_PASSIVE_SCAN | 1153fc71f77SLuis R. Rodriguez NL80211_RRF_NO_IBSS), 1163fc71f77SLuis R. Rodriguez 1173fc71f77SLuis R. Rodriguez /* NB: 5260 MHz - 5700 MHz requies DFS */ 1183fc71f77SLuis R. Rodriguez 1193fc71f77SLuis R. Rodriguez /* IEEE 802.11a, channel 149..165 */ 120ec329aceSLuis R. Rodriguez REG_RULE(5745-10, 5825+10, 40, 6, 20, 1213fc71f77SLuis R. Rodriguez NL80211_RRF_PASSIVE_SCAN | 1223fc71f77SLuis R. Rodriguez NL80211_RRF_NO_IBSS), 123734366deSJohannes Berg } 124734366deSJohannes Berg }; 125734366deSJohannes Berg 126a3d2eaf0SJohannes Berg static const struct ieee80211_regdomain *cfg80211_world_regdom = 127a3d2eaf0SJohannes Berg &world_regdom; 128734366deSJohannes Berg 1296ee7d330SLuis R. Rodriguez static char *ieee80211_regdom = "00"; 13009d989d1SLuis R. Rodriguez static char user_alpha2[2]; 1316ee7d330SLuis R. Rodriguez 132734366deSJohannes Berg module_param(ieee80211_regdom, charp, 0444); 133734366deSJohannes Berg MODULE_PARM_DESC(ieee80211_regdom, "IEEE 802.11 regulatory domain code"); 134734366deSJohannes Berg 135734366deSJohannes Berg static void reset_regdomains(void) 136734366deSJohannes Berg { 137942b25cfSJohannes Berg /* avoid freeing static information or freeing something twice */ 138942b25cfSJohannes Berg if (cfg80211_regdomain == cfg80211_world_regdom) 139942b25cfSJohannes Berg cfg80211_regdomain = NULL; 140942b25cfSJohannes Berg if (cfg80211_world_regdom == &world_regdom) 141942b25cfSJohannes Berg cfg80211_world_regdom = NULL; 142942b25cfSJohannes Berg if (cfg80211_regdomain == &world_regdom) 143942b25cfSJohannes Berg cfg80211_regdomain = NULL; 144942b25cfSJohannes Berg 145734366deSJohannes Berg kfree(cfg80211_regdomain); 146734366deSJohannes Berg kfree(cfg80211_world_regdom); 147734366deSJohannes Berg 148a3d2eaf0SJohannes Berg cfg80211_world_regdom = &world_regdom; 149734366deSJohannes Berg cfg80211_regdomain = NULL; 150734366deSJohannes Berg } 151734366deSJohannes Berg 152fb1fc7adSLuis R. Rodriguez /* 153fb1fc7adSLuis R. Rodriguez * Dynamic world regulatory domain requested by the wireless 154fb1fc7adSLuis R. Rodriguez * core upon initialization 155fb1fc7adSLuis R. Rodriguez */ 156a3d2eaf0SJohannes Berg static void update_world_regdomain(const struct ieee80211_regdomain *rd) 157734366deSJohannes Berg { 158f6037d09SJohannes Berg BUG_ON(!last_request); 159734366deSJohannes Berg 160734366deSJohannes Berg reset_regdomains(); 161734366deSJohannes Berg 162734366deSJohannes Berg cfg80211_world_regdom = rd; 163734366deSJohannes Berg cfg80211_regdomain = rd; 164734366deSJohannes Berg } 165734366deSJohannes Berg 166a3d2eaf0SJohannes Berg bool is_world_regdom(const char *alpha2) 167b2e1b302SLuis R. Rodriguez { 168b2e1b302SLuis R. Rodriguez if (!alpha2) 169b2e1b302SLuis R. Rodriguez return false; 170b2e1b302SLuis R. Rodriguez if (alpha2[0] == '0' && alpha2[1] == '0') 171b2e1b302SLuis R. Rodriguez return true; 172b2e1b302SLuis R. Rodriguez return false; 173b2e1b302SLuis R. Rodriguez } 174b2e1b302SLuis R. Rodriguez 175a3d2eaf0SJohannes Berg static bool is_alpha2_set(const char *alpha2) 176b2e1b302SLuis R. Rodriguez { 177b2e1b302SLuis R. Rodriguez if (!alpha2) 178b2e1b302SLuis R. Rodriguez return false; 179b2e1b302SLuis R. Rodriguez if (alpha2[0] != 0 && alpha2[1] != 0) 180b2e1b302SLuis R. Rodriguez return true; 181b2e1b302SLuis R. Rodriguez return false; 182b2e1b302SLuis R. Rodriguez } 183b2e1b302SLuis R. Rodriguez 184b2e1b302SLuis R. Rodriguez static bool is_alpha_upper(char letter) 185b2e1b302SLuis R. Rodriguez { 186b2e1b302SLuis R. Rodriguez /* ASCII A - Z */ 187b2e1b302SLuis R. Rodriguez if (letter >= 65 && letter <= 90) 188b2e1b302SLuis R. Rodriguez return true; 189b2e1b302SLuis R. Rodriguez return false; 190b2e1b302SLuis R. Rodriguez } 191b2e1b302SLuis R. Rodriguez 192a3d2eaf0SJohannes Berg static bool is_unknown_alpha2(const char *alpha2) 193b2e1b302SLuis R. Rodriguez { 194b2e1b302SLuis R. Rodriguez if (!alpha2) 195b2e1b302SLuis R. Rodriguez return false; 196fb1fc7adSLuis R. Rodriguez /* 197fb1fc7adSLuis R. Rodriguez * Special case where regulatory domain was built by driver 198fb1fc7adSLuis R. Rodriguez * but a specific alpha2 cannot be determined 199fb1fc7adSLuis R. Rodriguez */ 200b2e1b302SLuis R. Rodriguez if (alpha2[0] == '9' && alpha2[1] == '9') 201b2e1b302SLuis R. Rodriguez return true; 202b2e1b302SLuis R. Rodriguez return false; 203b2e1b302SLuis R. Rodriguez } 204b2e1b302SLuis R. Rodriguez 2053f2355cbSLuis R. Rodriguez static bool is_intersected_alpha2(const char *alpha2) 2063f2355cbSLuis R. Rodriguez { 2073f2355cbSLuis R. Rodriguez if (!alpha2) 2083f2355cbSLuis R. Rodriguez return false; 209fb1fc7adSLuis R. Rodriguez /* 210fb1fc7adSLuis R. Rodriguez * Special case where regulatory domain is the 2113f2355cbSLuis R. Rodriguez * result of an intersection between two regulatory domain 212fb1fc7adSLuis R. Rodriguez * structures 213fb1fc7adSLuis R. Rodriguez */ 2143f2355cbSLuis R. Rodriguez if (alpha2[0] == '9' && alpha2[1] == '8') 2153f2355cbSLuis R. Rodriguez return true; 2163f2355cbSLuis R. Rodriguez return false; 2173f2355cbSLuis R. Rodriguez } 2183f2355cbSLuis R. Rodriguez 219a3d2eaf0SJohannes Berg static bool is_an_alpha2(const char *alpha2) 220b2e1b302SLuis R. Rodriguez { 221b2e1b302SLuis R. Rodriguez if (!alpha2) 222b2e1b302SLuis R. Rodriguez return false; 223b2e1b302SLuis R. Rodriguez if (is_alpha_upper(alpha2[0]) && is_alpha_upper(alpha2[1])) 224b2e1b302SLuis R. Rodriguez return true; 225b2e1b302SLuis R. Rodriguez return false; 226b2e1b302SLuis R. Rodriguez } 227b2e1b302SLuis R. Rodriguez 228a3d2eaf0SJohannes Berg static bool alpha2_equal(const char *alpha2_x, const char *alpha2_y) 229b2e1b302SLuis R. Rodriguez { 230b2e1b302SLuis R. Rodriguez if (!alpha2_x || !alpha2_y) 231b2e1b302SLuis R. Rodriguez return false; 232b2e1b302SLuis R. Rodriguez if (alpha2_x[0] == alpha2_y[0] && 233b2e1b302SLuis R. Rodriguez alpha2_x[1] == alpha2_y[1]) 234b2e1b302SLuis R. Rodriguez return true; 235b2e1b302SLuis R. Rodriguez return false; 236b2e1b302SLuis R. Rodriguez } 237b2e1b302SLuis R. Rodriguez 23869b1572bSLuis R. Rodriguez static bool regdom_changes(const char *alpha2) 239b2e1b302SLuis R. Rodriguez { 240761cf7ecSLuis R. Rodriguez assert_cfg80211_lock(); 241761cf7ecSLuis R. Rodriguez 242b2e1b302SLuis R. Rodriguez if (!cfg80211_regdomain) 243b2e1b302SLuis R. Rodriguez return true; 244b2e1b302SLuis R. Rodriguez if (alpha2_equal(cfg80211_regdomain->alpha2, alpha2)) 245b2e1b302SLuis R. Rodriguez return false; 246b2e1b302SLuis R. Rodriguez return true; 247b2e1b302SLuis R. Rodriguez } 248b2e1b302SLuis R. Rodriguez 24909d989d1SLuis R. Rodriguez /* 25009d989d1SLuis R. Rodriguez * The NL80211_REGDOM_SET_BY_USER regdom alpha2 is cached, this lets 25109d989d1SLuis R. Rodriguez * you know if a valid regulatory hint with NL80211_REGDOM_SET_BY_USER 25209d989d1SLuis R. Rodriguez * has ever been issued. 25309d989d1SLuis R. Rodriguez */ 25409d989d1SLuis R. Rodriguez static bool is_user_regdom_saved(void) 25509d989d1SLuis R. Rodriguez { 25609d989d1SLuis R. Rodriguez if (user_alpha2[0] == '9' && user_alpha2[1] == '7') 25709d989d1SLuis R. Rodriguez return false; 25809d989d1SLuis R. Rodriguez 25909d989d1SLuis R. Rodriguez /* This would indicate a mistake on the design */ 26009d989d1SLuis R. Rodriguez if (WARN((!is_world_regdom(user_alpha2) && 26109d989d1SLuis R. Rodriguez !is_an_alpha2(user_alpha2)), 26209d989d1SLuis R. Rodriguez "Unexpected user alpha2: %c%c\n", 26309d989d1SLuis R. Rodriguez user_alpha2[0], 26409d989d1SLuis R. Rodriguez user_alpha2[1])) 26509d989d1SLuis R. Rodriguez return false; 26609d989d1SLuis R. Rodriguez 26709d989d1SLuis R. Rodriguez return true; 26809d989d1SLuis R. Rodriguez } 26909d989d1SLuis R. Rodriguez 2703b377ea9SJohn W. Linville static int reg_copy_regd(const struct ieee80211_regdomain **dst_regd, 2713b377ea9SJohn W. Linville const struct ieee80211_regdomain *src_regd) 2723b377ea9SJohn W. Linville { 2733b377ea9SJohn W. Linville struct ieee80211_regdomain *regd; 2743b377ea9SJohn W. Linville int size_of_regd = 0; 2753b377ea9SJohn W. Linville unsigned int i; 2763b377ea9SJohn W. Linville 2773b377ea9SJohn W. Linville size_of_regd = sizeof(struct ieee80211_regdomain) + 2783b377ea9SJohn W. Linville ((src_regd->n_reg_rules + 1) * sizeof(struct ieee80211_reg_rule)); 2793b377ea9SJohn W. Linville 2803b377ea9SJohn W. Linville regd = kzalloc(size_of_regd, GFP_KERNEL); 2813b377ea9SJohn W. Linville if (!regd) 2823b377ea9SJohn W. Linville return -ENOMEM; 2833b377ea9SJohn W. Linville 2843b377ea9SJohn W. Linville memcpy(regd, src_regd, sizeof(struct ieee80211_regdomain)); 2853b377ea9SJohn W. Linville 2863b377ea9SJohn W. Linville for (i = 0; i < src_regd->n_reg_rules; i++) 2873b377ea9SJohn W. Linville memcpy(®d->reg_rules[i], &src_regd->reg_rules[i], 2883b377ea9SJohn W. Linville sizeof(struct ieee80211_reg_rule)); 2893b377ea9SJohn W. Linville 2903b377ea9SJohn W. Linville *dst_regd = regd; 2913b377ea9SJohn W. Linville return 0; 2923b377ea9SJohn W. Linville } 2933b377ea9SJohn W. Linville 2943b377ea9SJohn W. Linville #ifdef CONFIG_CFG80211_INTERNAL_REGDB 2953b377ea9SJohn W. Linville struct reg_regdb_search_request { 2963b377ea9SJohn W. Linville char alpha2[2]; 2973b377ea9SJohn W. Linville struct list_head list; 2983b377ea9SJohn W. Linville }; 2993b377ea9SJohn W. Linville 3003b377ea9SJohn W. Linville static LIST_HEAD(reg_regdb_search_list); 301368d06f5SJohn W. Linville static DEFINE_MUTEX(reg_regdb_search_mutex); 3023b377ea9SJohn W. Linville 3033b377ea9SJohn W. Linville static void reg_regdb_search(struct work_struct *work) 3043b377ea9SJohn W. Linville { 3053b377ea9SJohn W. Linville struct reg_regdb_search_request *request; 3063b377ea9SJohn W. Linville const struct ieee80211_regdomain *curdom, *regdom; 3073b377ea9SJohn W. Linville int i, r; 3083b377ea9SJohn W. Linville 309368d06f5SJohn W. Linville mutex_lock(®_regdb_search_mutex); 3103b377ea9SJohn W. Linville while (!list_empty(®_regdb_search_list)) { 3113b377ea9SJohn W. Linville request = list_first_entry(®_regdb_search_list, 3123b377ea9SJohn W. Linville struct reg_regdb_search_request, 3133b377ea9SJohn W. Linville list); 3143b377ea9SJohn W. Linville list_del(&request->list); 3153b377ea9SJohn W. Linville 3163b377ea9SJohn W. Linville for (i=0; i<reg_regdb_size; i++) { 3173b377ea9SJohn W. Linville curdom = reg_regdb[i]; 3183b377ea9SJohn W. Linville 3193b377ea9SJohn W. Linville if (!memcmp(request->alpha2, curdom->alpha2, 2)) { 3203b377ea9SJohn W. Linville r = reg_copy_regd(®dom, curdom); 3213b377ea9SJohn W. Linville if (r) 3223b377ea9SJohn W. Linville break; 3233b377ea9SJohn W. Linville mutex_lock(&cfg80211_mutex); 3243b377ea9SJohn W. Linville set_regdom(regdom); 3253b377ea9SJohn W. Linville mutex_unlock(&cfg80211_mutex); 3263b377ea9SJohn W. Linville break; 3273b377ea9SJohn W. Linville } 3283b377ea9SJohn W. Linville } 3293b377ea9SJohn W. Linville 3303b377ea9SJohn W. Linville kfree(request); 3313b377ea9SJohn W. Linville } 332368d06f5SJohn W. Linville mutex_unlock(®_regdb_search_mutex); 3333b377ea9SJohn W. Linville } 3343b377ea9SJohn W. Linville 3353b377ea9SJohn W. Linville static DECLARE_WORK(reg_regdb_work, reg_regdb_search); 3363b377ea9SJohn W. Linville 3373b377ea9SJohn W. Linville static void reg_regdb_query(const char *alpha2) 3383b377ea9SJohn W. Linville { 3393b377ea9SJohn W. Linville struct reg_regdb_search_request *request; 3403b377ea9SJohn W. Linville 3413b377ea9SJohn W. Linville if (!alpha2) 3423b377ea9SJohn W. Linville return; 3433b377ea9SJohn W. Linville 3443b377ea9SJohn W. Linville request = kzalloc(sizeof(struct reg_regdb_search_request), GFP_KERNEL); 3453b377ea9SJohn W. Linville if (!request) 3463b377ea9SJohn W. Linville return; 3473b377ea9SJohn W. Linville 3483b377ea9SJohn W. Linville memcpy(request->alpha2, alpha2, 2); 3493b377ea9SJohn W. Linville 350368d06f5SJohn W. Linville mutex_lock(®_regdb_search_mutex); 3513b377ea9SJohn W. Linville list_add_tail(&request->list, ®_regdb_search_list); 352368d06f5SJohn W. Linville mutex_unlock(®_regdb_search_mutex); 3533b377ea9SJohn W. Linville 3543b377ea9SJohn W. Linville schedule_work(®_regdb_work); 3553b377ea9SJohn W. Linville } 3563b377ea9SJohn W. Linville #else 3573b377ea9SJohn W. Linville static inline void reg_regdb_query(const char *alpha2) {} 3583b377ea9SJohn W. Linville #endif /* CONFIG_CFG80211_INTERNAL_REGDB */ 3593b377ea9SJohn W. Linville 360fb1fc7adSLuis R. Rodriguez /* 361fb1fc7adSLuis R. Rodriguez * This lets us keep regulatory code which is updated on a regulatory 362fb1fc7adSLuis R. Rodriguez * basis in userspace. 363fb1fc7adSLuis R. Rodriguez */ 364b2e1b302SLuis R. Rodriguez static int call_crda(const char *alpha2) 365b2e1b302SLuis R. Rodriguez { 366b2e1b302SLuis R. Rodriguez char country_env[9 + 2] = "COUNTRY="; 367b2e1b302SLuis R. Rodriguez char *envp[] = { 368b2e1b302SLuis R. Rodriguez country_env, 369b2e1b302SLuis R. Rodriguez NULL 3708318d78aSJohannes Berg }; 3718318d78aSJohannes Berg 372b2e1b302SLuis R. Rodriguez if (!is_world_regdom((char *) alpha2)) 373b2e1b302SLuis R. Rodriguez printk(KERN_INFO "cfg80211: Calling CRDA for country: %c%c\n", 374b2e1b302SLuis R. Rodriguez alpha2[0], alpha2[1]); 375b2e1b302SLuis R. Rodriguez else 376b2e1b302SLuis R. Rodriguez printk(KERN_INFO "cfg80211: Calling CRDA to update world " 377b2e1b302SLuis R. Rodriguez "regulatory domain\n"); 3788318d78aSJohannes Berg 3793b377ea9SJohn W. Linville /* query internal regulatory database (if it exists) */ 3803b377ea9SJohn W. Linville reg_regdb_query(alpha2); 3813b377ea9SJohn W. Linville 382b2e1b302SLuis R. Rodriguez country_env[8] = alpha2[0]; 383b2e1b302SLuis R. Rodriguez country_env[9] = alpha2[1]; 3848318d78aSJohannes Berg 385b2e1b302SLuis R. Rodriguez return kobject_uevent_env(®_pdev->dev.kobj, KOBJ_CHANGE, envp); 386b2e1b302SLuis R. Rodriguez } 387b2e1b302SLuis R. Rodriguez 388b2e1b302SLuis R. Rodriguez /* Used by nl80211 before kmalloc'ing our regulatory domain */ 389a3d2eaf0SJohannes Berg bool reg_is_valid_request(const char *alpha2) 390b2e1b302SLuis R. Rodriguez { 39161405e97SLuis R. Rodriguez assert_cfg80211_lock(); 39261405e97SLuis R. Rodriguez 393f6037d09SJohannes Berg if (!last_request) 394f6037d09SJohannes Berg return false; 395f6037d09SJohannes Berg 396f6037d09SJohannes Berg return alpha2_equal(last_request->alpha2, alpha2); 397b2e1b302SLuis R. Rodriguez } 398b2e1b302SLuis R. Rodriguez 399b2e1b302SLuis R. Rodriguez /* Sanity check on a regulatory rule */ 400a3d2eaf0SJohannes Berg static bool is_valid_reg_rule(const struct ieee80211_reg_rule *rule) 401b2e1b302SLuis R. Rodriguez { 402a3d2eaf0SJohannes Berg const struct ieee80211_freq_range *freq_range = &rule->freq_range; 403b2e1b302SLuis R. Rodriguez u32 freq_diff; 404b2e1b302SLuis R. Rodriguez 40591e99004SLuis R. Rodriguez if (freq_range->start_freq_khz <= 0 || freq_range->end_freq_khz <= 0) 406b2e1b302SLuis R. Rodriguez return false; 407b2e1b302SLuis R. Rodriguez 408b2e1b302SLuis R. Rodriguez if (freq_range->start_freq_khz > freq_range->end_freq_khz) 409b2e1b302SLuis R. Rodriguez return false; 410b2e1b302SLuis R. Rodriguez 411b2e1b302SLuis R. Rodriguez freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz; 412b2e1b302SLuis R. Rodriguez 413bd05f28eSRoel Kluin if (freq_range->end_freq_khz <= freq_range->start_freq_khz || 414bd05f28eSRoel Kluin freq_range->max_bandwidth_khz > freq_diff) 415b2e1b302SLuis R. Rodriguez return false; 416b2e1b302SLuis R. Rodriguez 417b2e1b302SLuis R. Rodriguez return true; 418b2e1b302SLuis R. Rodriguez } 419b2e1b302SLuis R. Rodriguez 420a3d2eaf0SJohannes Berg static bool is_valid_rd(const struct ieee80211_regdomain *rd) 421b2e1b302SLuis R. Rodriguez { 422a3d2eaf0SJohannes Berg const struct ieee80211_reg_rule *reg_rule = NULL; 423b2e1b302SLuis R. Rodriguez unsigned int i; 424b2e1b302SLuis R. Rodriguez 425b2e1b302SLuis R. Rodriguez if (!rd->n_reg_rules) 426b2e1b302SLuis R. Rodriguez return false; 427b2e1b302SLuis R. Rodriguez 42888dc1c3fSLuis R. Rodriguez if (WARN_ON(rd->n_reg_rules > NL80211_MAX_SUPP_REG_RULES)) 42988dc1c3fSLuis R. Rodriguez return false; 43088dc1c3fSLuis R. Rodriguez 431b2e1b302SLuis R. Rodriguez for (i = 0; i < rd->n_reg_rules; i++) { 432b2e1b302SLuis R. Rodriguez reg_rule = &rd->reg_rules[i]; 433b2e1b302SLuis R. Rodriguez if (!is_valid_reg_rule(reg_rule)) 434b2e1b302SLuis R. Rodriguez return false; 435b2e1b302SLuis R. Rodriguez } 436b2e1b302SLuis R. Rodriguez 437b2e1b302SLuis R. Rodriguez return true; 438b2e1b302SLuis R. Rodriguez } 439b2e1b302SLuis R. Rodriguez 440038659e7SLuis R. Rodriguez static bool reg_does_bw_fit(const struct ieee80211_freq_range *freq_range, 441038659e7SLuis R. Rodriguez u32 center_freq_khz, 442038659e7SLuis R. Rodriguez u32 bw_khz) 443b2e1b302SLuis R. Rodriguez { 444038659e7SLuis R. Rodriguez u32 start_freq_khz, end_freq_khz; 445038659e7SLuis R. Rodriguez 446038659e7SLuis R. Rodriguez start_freq_khz = center_freq_khz - (bw_khz/2); 447038659e7SLuis R. Rodriguez end_freq_khz = center_freq_khz + (bw_khz/2); 448038659e7SLuis R. Rodriguez 449b2e1b302SLuis R. Rodriguez if (start_freq_khz >= freq_range->start_freq_khz && 450b2e1b302SLuis R. Rodriguez end_freq_khz <= freq_range->end_freq_khz) 451038659e7SLuis R. Rodriguez return true; 452038659e7SLuis R. Rodriguez 453038659e7SLuis R. Rodriguez return false; 454b2e1b302SLuis R. Rodriguez } 455b2e1b302SLuis R. Rodriguez 4560c7dc45dSLuis R. Rodriguez /** 4570c7dc45dSLuis R. Rodriguez * freq_in_rule_band - tells us if a frequency is in a frequency band 4580c7dc45dSLuis R. Rodriguez * @freq_range: frequency rule we want to query 4590c7dc45dSLuis R. Rodriguez * @freq_khz: frequency we are inquiring about 4600c7dc45dSLuis R. Rodriguez * 4610c7dc45dSLuis R. Rodriguez * This lets us know if a specific frequency rule is or is not relevant to 4620c7dc45dSLuis R. Rodriguez * a specific frequency's band. Bands are device specific and artificial 4630c7dc45dSLuis R. Rodriguez * definitions (the "2.4 GHz band" and the "5 GHz band"), however it is 4640c7dc45dSLuis R. Rodriguez * safe for now to assume that a frequency rule should not be part of a 4650c7dc45dSLuis R. Rodriguez * frequency's band if the start freq or end freq are off by more than 2 GHz. 4660c7dc45dSLuis R. Rodriguez * This resolution can be lowered and should be considered as we add 4670c7dc45dSLuis R. Rodriguez * regulatory rule support for other "bands". 4680c7dc45dSLuis R. Rodriguez **/ 4690c7dc45dSLuis R. Rodriguez static bool freq_in_rule_band(const struct ieee80211_freq_range *freq_range, 4700c7dc45dSLuis R. Rodriguez u32 freq_khz) 4710c7dc45dSLuis R. Rodriguez { 4720c7dc45dSLuis R. Rodriguez #define ONE_GHZ_IN_KHZ 1000000 4730c7dc45dSLuis R. Rodriguez if (abs(freq_khz - freq_range->start_freq_khz) <= (2 * ONE_GHZ_IN_KHZ)) 4740c7dc45dSLuis R. Rodriguez return true; 4750c7dc45dSLuis R. Rodriguez if (abs(freq_khz - freq_range->end_freq_khz) <= (2 * ONE_GHZ_IN_KHZ)) 4760c7dc45dSLuis R. Rodriguez return true; 4770c7dc45dSLuis R. Rodriguez return false; 4780c7dc45dSLuis R. Rodriguez #undef ONE_GHZ_IN_KHZ 4790c7dc45dSLuis R. Rodriguez } 4800c7dc45dSLuis R. Rodriguez 481fb1fc7adSLuis R. Rodriguez /* 482fb1fc7adSLuis R. Rodriguez * Helper for regdom_intersect(), this does the real 483fb1fc7adSLuis R. Rodriguez * mathematical intersection fun 484fb1fc7adSLuis R. Rodriguez */ 4859c96477dSLuis R. Rodriguez static int reg_rules_intersect( 4869c96477dSLuis R. Rodriguez const struct ieee80211_reg_rule *rule1, 4879c96477dSLuis R. Rodriguez const struct ieee80211_reg_rule *rule2, 4889c96477dSLuis R. Rodriguez struct ieee80211_reg_rule *intersected_rule) 4899c96477dSLuis R. Rodriguez { 4909c96477dSLuis R. Rodriguez const struct ieee80211_freq_range *freq_range1, *freq_range2; 4919c96477dSLuis R. Rodriguez struct ieee80211_freq_range *freq_range; 4929c96477dSLuis R. Rodriguez const struct ieee80211_power_rule *power_rule1, *power_rule2; 4939c96477dSLuis R. Rodriguez struct ieee80211_power_rule *power_rule; 4949c96477dSLuis R. Rodriguez u32 freq_diff; 4959c96477dSLuis R. Rodriguez 4969c96477dSLuis R. Rodriguez freq_range1 = &rule1->freq_range; 4979c96477dSLuis R. Rodriguez freq_range2 = &rule2->freq_range; 4989c96477dSLuis R. Rodriguez freq_range = &intersected_rule->freq_range; 4999c96477dSLuis R. Rodriguez 5009c96477dSLuis R. Rodriguez power_rule1 = &rule1->power_rule; 5019c96477dSLuis R. Rodriguez power_rule2 = &rule2->power_rule; 5029c96477dSLuis R. Rodriguez power_rule = &intersected_rule->power_rule; 5039c96477dSLuis R. Rodriguez 5049c96477dSLuis R. Rodriguez freq_range->start_freq_khz = max(freq_range1->start_freq_khz, 5059c96477dSLuis R. Rodriguez freq_range2->start_freq_khz); 5069c96477dSLuis R. Rodriguez freq_range->end_freq_khz = min(freq_range1->end_freq_khz, 5079c96477dSLuis R. Rodriguez freq_range2->end_freq_khz); 5089c96477dSLuis R. Rodriguez freq_range->max_bandwidth_khz = min(freq_range1->max_bandwidth_khz, 5099c96477dSLuis R. Rodriguez freq_range2->max_bandwidth_khz); 5109c96477dSLuis R. Rodriguez 5119c96477dSLuis R. Rodriguez freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz; 5129c96477dSLuis R. Rodriguez if (freq_range->max_bandwidth_khz > freq_diff) 5139c96477dSLuis R. Rodriguez freq_range->max_bandwidth_khz = freq_diff; 5149c96477dSLuis R. Rodriguez 5159c96477dSLuis R. Rodriguez power_rule->max_eirp = min(power_rule1->max_eirp, 5169c96477dSLuis R. Rodriguez power_rule2->max_eirp); 5179c96477dSLuis R. Rodriguez power_rule->max_antenna_gain = min(power_rule1->max_antenna_gain, 5189c96477dSLuis R. Rodriguez power_rule2->max_antenna_gain); 5199c96477dSLuis R. Rodriguez 5209c96477dSLuis R. Rodriguez intersected_rule->flags = (rule1->flags | rule2->flags); 5219c96477dSLuis R. Rodriguez 5229c96477dSLuis R. Rodriguez if (!is_valid_reg_rule(intersected_rule)) 5239c96477dSLuis R. Rodriguez return -EINVAL; 5249c96477dSLuis R. Rodriguez 5259c96477dSLuis R. Rodriguez return 0; 5269c96477dSLuis R. Rodriguez } 5279c96477dSLuis R. Rodriguez 5289c96477dSLuis R. Rodriguez /** 5299c96477dSLuis R. Rodriguez * regdom_intersect - do the intersection between two regulatory domains 5309c96477dSLuis R. Rodriguez * @rd1: first regulatory domain 5319c96477dSLuis R. Rodriguez * @rd2: second regulatory domain 5329c96477dSLuis R. Rodriguez * 5339c96477dSLuis R. Rodriguez * Use this function to get the intersection between two regulatory domains. 5349c96477dSLuis R. Rodriguez * Once completed we will mark the alpha2 for the rd as intersected, "98", 5359c96477dSLuis R. Rodriguez * as no one single alpha2 can represent this regulatory domain. 5369c96477dSLuis R. Rodriguez * 5379c96477dSLuis R. Rodriguez * Returns a pointer to the regulatory domain structure which will hold the 5389c96477dSLuis R. Rodriguez * resulting intersection of rules between rd1 and rd2. We will 5399c96477dSLuis R. Rodriguez * kzalloc() this structure for you. 5409c96477dSLuis R. Rodriguez */ 5419c96477dSLuis R. Rodriguez static struct ieee80211_regdomain *regdom_intersect( 5429c96477dSLuis R. Rodriguez const struct ieee80211_regdomain *rd1, 5439c96477dSLuis R. Rodriguez const struct ieee80211_regdomain *rd2) 5449c96477dSLuis R. Rodriguez { 5459c96477dSLuis R. Rodriguez int r, size_of_regd; 5469c96477dSLuis R. Rodriguez unsigned int x, y; 5479c96477dSLuis R. Rodriguez unsigned int num_rules = 0, rule_idx = 0; 5489c96477dSLuis R. Rodriguez const struct ieee80211_reg_rule *rule1, *rule2; 5499c96477dSLuis R. Rodriguez struct ieee80211_reg_rule *intersected_rule; 5509c96477dSLuis R. Rodriguez struct ieee80211_regdomain *rd; 5519c96477dSLuis R. Rodriguez /* This is just a dummy holder to help us count */ 5529c96477dSLuis R. Rodriguez struct ieee80211_reg_rule irule; 5539c96477dSLuis R. Rodriguez 5549c96477dSLuis R. Rodriguez /* Uses the stack temporarily for counter arithmetic */ 5559c96477dSLuis R. Rodriguez intersected_rule = &irule; 5569c96477dSLuis R. Rodriguez 5579c96477dSLuis R. Rodriguez memset(intersected_rule, 0, sizeof(struct ieee80211_reg_rule)); 5589c96477dSLuis R. Rodriguez 5599c96477dSLuis R. Rodriguez if (!rd1 || !rd2) 5609c96477dSLuis R. Rodriguez return NULL; 5619c96477dSLuis R. Rodriguez 562fb1fc7adSLuis R. Rodriguez /* 563fb1fc7adSLuis R. Rodriguez * First we get a count of the rules we'll need, then we actually 5649c96477dSLuis R. Rodriguez * build them. This is to so we can malloc() and free() a 5659c96477dSLuis R. Rodriguez * regdomain once. The reason we use reg_rules_intersect() here 5669c96477dSLuis R. Rodriguez * is it will return -EINVAL if the rule computed makes no sense. 567fb1fc7adSLuis R. Rodriguez * All rules that do check out OK are valid. 568fb1fc7adSLuis R. Rodriguez */ 5699c96477dSLuis R. Rodriguez 5709c96477dSLuis R. Rodriguez for (x = 0; x < rd1->n_reg_rules; x++) { 5719c96477dSLuis R. Rodriguez rule1 = &rd1->reg_rules[x]; 5729c96477dSLuis R. Rodriguez for (y = 0; y < rd2->n_reg_rules; y++) { 5739c96477dSLuis R. Rodriguez rule2 = &rd2->reg_rules[y]; 5749c96477dSLuis R. Rodriguez if (!reg_rules_intersect(rule1, rule2, 5759c96477dSLuis R. Rodriguez intersected_rule)) 5769c96477dSLuis R. Rodriguez num_rules++; 5779c96477dSLuis R. Rodriguez memset(intersected_rule, 0, 5789c96477dSLuis R. Rodriguez sizeof(struct ieee80211_reg_rule)); 5799c96477dSLuis R. Rodriguez } 5809c96477dSLuis R. Rodriguez } 5819c96477dSLuis R. Rodriguez 5829c96477dSLuis R. Rodriguez if (!num_rules) 5839c96477dSLuis R. Rodriguez return NULL; 5849c96477dSLuis R. Rodriguez 5859c96477dSLuis R. Rodriguez size_of_regd = sizeof(struct ieee80211_regdomain) + 5869c96477dSLuis R. Rodriguez ((num_rules + 1) * sizeof(struct ieee80211_reg_rule)); 5879c96477dSLuis R. Rodriguez 5889c96477dSLuis R. Rodriguez rd = kzalloc(size_of_regd, GFP_KERNEL); 5899c96477dSLuis R. Rodriguez if (!rd) 5909c96477dSLuis R. Rodriguez return NULL; 5919c96477dSLuis R. Rodriguez 5929c96477dSLuis R. Rodriguez for (x = 0; x < rd1->n_reg_rules; x++) { 5939c96477dSLuis R. Rodriguez rule1 = &rd1->reg_rules[x]; 5949c96477dSLuis R. Rodriguez for (y = 0; y < rd2->n_reg_rules; y++) { 5959c96477dSLuis R. Rodriguez rule2 = &rd2->reg_rules[y]; 596fb1fc7adSLuis R. Rodriguez /* 597fb1fc7adSLuis R. Rodriguez * This time around instead of using the stack lets 5989c96477dSLuis R. Rodriguez * write to the target rule directly saving ourselves 599fb1fc7adSLuis R. Rodriguez * a memcpy() 600fb1fc7adSLuis R. Rodriguez */ 6019c96477dSLuis R. Rodriguez intersected_rule = &rd->reg_rules[rule_idx]; 6029c96477dSLuis R. Rodriguez r = reg_rules_intersect(rule1, rule2, 6039c96477dSLuis R. Rodriguez intersected_rule); 604fb1fc7adSLuis R. Rodriguez /* 605fb1fc7adSLuis R. Rodriguez * No need to memset here the intersected rule here as 606fb1fc7adSLuis R. Rodriguez * we're not using the stack anymore 607fb1fc7adSLuis R. Rodriguez */ 6089c96477dSLuis R. Rodriguez if (r) 6099c96477dSLuis R. Rodriguez continue; 6109c96477dSLuis R. Rodriguez rule_idx++; 6119c96477dSLuis R. Rodriguez } 6129c96477dSLuis R. Rodriguez } 6139c96477dSLuis R. Rodriguez 6149c96477dSLuis R. Rodriguez if (rule_idx != num_rules) { 6159c96477dSLuis R. Rodriguez kfree(rd); 6169c96477dSLuis R. Rodriguez return NULL; 6179c96477dSLuis R. Rodriguez } 6189c96477dSLuis R. Rodriguez 6199c96477dSLuis R. Rodriguez rd->n_reg_rules = num_rules; 6209c96477dSLuis R. Rodriguez rd->alpha2[0] = '9'; 6219c96477dSLuis R. Rodriguez rd->alpha2[1] = '8'; 6229c96477dSLuis R. Rodriguez 6239c96477dSLuis R. Rodriguez return rd; 6249c96477dSLuis R. Rodriguez } 6259c96477dSLuis R. Rodriguez 626fb1fc7adSLuis R. Rodriguez /* 627fb1fc7adSLuis R. Rodriguez * XXX: add support for the rest of enum nl80211_reg_rule_flags, we may 628fb1fc7adSLuis R. Rodriguez * want to just have the channel structure use these 629fb1fc7adSLuis R. Rodriguez */ 630b2e1b302SLuis R. Rodriguez static u32 map_regdom_flags(u32 rd_flags) 631b2e1b302SLuis R. Rodriguez { 632b2e1b302SLuis R. Rodriguez u32 channel_flags = 0; 633b2e1b302SLuis R. Rodriguez if (rd_flags & NL80211_RRF_PASSIVE_SCAN) 634b2e1b302SLuis R. Rodriguez channel_flags |= IEEE80211_CHAN_PASSIVE_SCAN; 635b2e1b302SLuis R. Rodriguez if (rd_flags & NL80211_RRF_NO_IBSS) 636b2e1b302SLuis R. Rodriguez channel_flags |= IEEE80211_CHAN_NO_IBSS; 637b2e1b302SLuis R. Rodriguez if (rd_flags & NL80211_RRF_DFS) 638b2e1b302SLuis R. Rodriguez channel_flags |= IEEE80211_CHAN_RADAR; 639b2e1b302SLuis R. Rodriguez return channel_flags; 640b2e1b302SLuis R. Rodriguez } 641b2e1b302SLuis R. Rodriguez 6421fa25e41SLuis R. Rodriguez static int freq_reg_info_regd(struct wiphy *wiphy, 6431fa25e41SLuis R. Rodriguez u32 center_freq, 644038659e7SLuis R. Rodriguez u32 desired_bw_khz, 6451fa25e41SLuis R. Rodriguez const struct ieee80211_reg_rule **reg_rule, 6461fa25e41SLuis R. Rodriguez const struct ieee80211_regdomain *custom_regd) 6478318d78aSJohannes Berg { 6488318d78aSJohannes Berg int i; 6490c7dc45dSLuis R. Rodriguez bool band_rule_found = false; 6503e0c3ff3SLuis R. Rodriguez const struct ieee80211_regdomain *regd; 651038659e7SLuis R. Rodriguez bool bw_fits = false; 652038659e7SLuis R. Rodriguez 653038659e7SLuis R. Rodriguez if (!desired_bw_khz) 654038659e7SLuis R. Rodriguez desired_bw_khz = MHZ_TO_KHZ(20); 6558318d78aSJohannes Berg 6561fa25e41SLuis R. Rodriguez regd = custom_regd ? custom_regd : cfg80211_regdomain; 6573e0c3ff3SLuis R. Rodriguez 658fb1fc7adSLuis R. Rodriguez /* 659fb1fc7adSLuis R. Rodriguez * Follow the driver's regulatory domain, if present, unless a country 660fb1fc7adSLuis R. Rodriguez * IE has been processed or a user wants to help complaince further 661fb1fc7adSLuis R. Rodriguez */ 6627db90f4aSLuis R. Rodriguez if (last_request->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && 6637db90f4aSLuis R. Rodriguez last_request->initiator != NL80211_REGDOM_SET_BY_USER && 6643e0c3ff3SLuis R. Rodriguez wiphy->regd) 6653e0c3ff3SLuis R. Rodriguez regd = wiphy->regd; 6663e0c3ff3SLuis R. Rodriguez 6673e0c3ff3SLuis R. Rodriguez if (!regd) 668b2e1b302SLuis R. Rodriguez return -EINVAL; 669b2e1b302SLuis R. Rodriguez 6703e0c3ff3SLuis R. Rodriguez for (i = 0; i < regd->n_reg_rules; i++) { 671b2e1b302SLuis R. Rodriguez const struct ieee80211_reg_rule *rr; 672b2e1b302SLuis R. Rodriguez const struct ieee80211_freq_range *fr = NULL; 673b2e1b302SLuis R. Rodriguez const struct ieee80211_power_rule *pr = NULL; 674b2e1b302SLuis R. Rodriguez 6753e0c3ff3SLuis R. Rodriguez rr = ®d->reg_rules[i]; 676b2e1b302SLuis R. Rodriguez fr = &rr->freq_range; 677b2e1b302SLuis R. Rodriguez pr = &rr->power_rule; 6780c7dc45dSLuis R. Rodriguez 679fb1fc7adSLuis R. Rodriguez /* 680fb1fc7adSLuis R. Rodriguez * We only need to know if one frequency rule was 6810c7dc45dSLuis R. Rodriguez * was in center_freq's band, that's enough, so lets 682fb1fc7adSLuis R. Rodriguez * not overwrite it once found 683fb1fc7adSLuis R. Rodriguez */ 6840c7dc45dSLuis R. Rodriguez if (!band_rule_found) 6850c7dc45dSLuis R. Rodriguez band_rule_found = freq_in_rule_band(fr, center_freq); 6860c7dc45dSLuis R. Rodriguez 687038659e7SLuis R. Rodriguez bw_fits = reg_does_bw_fit(fr, 688038659e7SLuis R. Rodriguez center_freq, 689038659e7SLuis R. Rodriguez desired_bw_khz); 6900c7dc45dSLuis R. Rodriguez 691038659e7SLuis R. Rodriguez if (band_rule_found && bw_fits) { 692b2e1b302SLuis R. Rodriguez *reg_rule = rr; 693038659e7SLuis R. Rodriguez return 0; 6948318d78aSJohannes Berg } 6958318d78aSJohannes Berg } 6968318d78aSJohannes Berg 6970c7dc45dSLuis R. Rodriguez if (!band_rule_found) 6980c7dc45dSLuis R. Rodriguez return -ERANGE; 6990c7dc45dSLuis R. Rodriguez 700038659e7SLuis R. Rodriguez return -EINVAL; 701b2e1b302SLuis R. Rodriguez } 702b2e1b302SLuis R. Rodriguez 703038659e7SLuis R. Rodriguez int freq_reg_info(struct wiphy *wiphy, 704038659e7SLuis R. Rodriguez u32 center_freq, 705038659e7SLuis R. Rodriguez u32 desired_bw_khz, 7061fa25e41SLuis R. Rodriguez const struct ieee80211_reg_rule **reg_rule) 7071fa25e41SLuis R. Rodriguez { 708ac46d48eSLuis R. Rodriguez assert_cfg80211_lock(); 709038659e7SLuis R. Rodriguez return freq_reg_info_regd(wiphy, 710038659e7SLuis R. Rodriguez center_freq, 711038659e7SLuis R. Rodriguez desired_bw_khz, 712038659e7SLuis R. Rodriguez reg_rule, 713038659e7SLuis R. Rodriguez NULL); 7141fa25e41SLuis R. Rodriguez } 7154f366c5dSJohn W. Linville EXPORT_SYMBOL(freq_reg_info); 716b2e1b302SLuis R. Rodriguez 717038659e7SLuis R. Rodriguez /* 718038659e7SLuis R. Rodriguez * Note that right now we assume the desired channel bandwidth 719038659e7SLuis R. Rodriguez * is always 20 MHz for each individual channel (HT40 uses 20 MHz 720038659e7SLuis R. Rodriguez * per channel, the primary and the extension channel). To support 721038659e7SLuis R. Rodriguez * smaller custom bandwidths such as 5 MHz or 10 MHz we'll need a 722038659e7SLuis R. Rodriguez * new ieee80211_channel.target_bw and re run the regulatory check 723038659e7SLuis R. Rodriguez * on the wiphy with the target_bw specified. Then we can simply use 724038659e7SLuis R. Rodriguez * that below for the desired_bw_khz below. 725038659e7SLuis R. Rodriguez */ 726a92a3ce7SLuis R. Rodriguez static void handle_channel(struct wiphy *wiphy, enum ieee80211_band band, 727a92a3ce7SLuis R. Rodriguez unsigned int chan_idx) 728b2e1b302SLuis R. Rodriguez { 729b2e1b302SLuis R. Rodriguez int r; 730038659e7SLuis R. Rodriguez u32 flags, bw_flags = 0; 731038659e7SLuis R. Rodriguez u32 desired_bw_khz = MHZ_TO_KHZ(20); 732b2e1b302SLuis R. Rodriguez const struct ieee80211_reg_rule *reg_rule = NULL; 733b2e1b302SLuis R. Rodriguez const struct ieee80211_power_rule *power_rule = NULL; 734038659e7SLuis R. Rodriguez const struct ieee80211_freq_range *freq_range = NULL; 735a92a3ce7SLuis R. Rodriguez struct ieee80211_supported_band *sband; 736a92a3ce7SLuis R. Rodriguez struct ieee80211_channel *chan; 737fe33eb39SLuis R. Rodriguez struct wiphy *request_wiphy = NULL; 738a92a3ce7SLuis R. Rodriguez 739761cf7ecSLuis R. Rodriguez assert_cfg80211_lock(); 740761cf7ecSLuis R. Rodriguez 741806a9e39SLuis R. Rodriguez request_wiphy = wiphy_idx_to_wiphy(last_request->wiphy_idx); 742806a9e39SLuis R. Rodriguez 743a92a3ce7SLuis R. Rodriguez sband = wiphy->bands[band]; 744a92a3ce7SLuis R. Rodriguez BUG_ON(chan_idx >= sband->n_channels); 745a92a3ce7SLuis R. Rodriguez chan = &sband->channels[chan_idx]; 746a92a3ce7SLuis R. Rodriguez 747a92a3ce7SLuis R. Rodriguez flags = chan->orig_flags; 748b2e1b302SLuis R. Rodriguez 749038659e7SLuis R. Rodriguez r = freq_reg_info(wiphy, 750038659e7SLuis R. Rodriguez MHZ_TO_KHZ(chan->center_freq), 751038659e7SLuis R. Rodriguez desired_bw_khz, 752038659e7SLuis R. Rodriguez ®_rule); 753b2e1b302SLuis R. Rodriguez 7544f366c5dSJohn W. Linville if (r) 7558318d78aSJohannes Berg return; 7568318d78aSJohannes Berg 757b2e1b302SLuis R. Rodriguez power_rule = ®_rule->power_rule; 758038659e7SLuis R. Rodriguez freq_range = ®_rule->freq_range; 759038659e7SLuis R. Rodriguez 760038659e7SLuis R. Rodriguez if (freq_range->max_bandwidth_khz < MHZ_TO_KHZ(40)) 761038659e7SLuis R. Rodriguez bw_flags = IEEE80211_CHAN_NO_HT40; 762b2e1b302SLuis R. Rodriguez 7637db90f4aSLuis R. Rodriguez if (last_request->initiator == NL80211_REGDOM_SET_BY_DRIVER && 764806a9e39SLuis R. Rodriguez request_wiphy && request_wiphy == wiphy && 7655be83de5SJohannes Berg request_wiphy->flags & WIPHY_FLAG_STRICT_REGULATORY) { 766fb1fc7adSLuis R. Rodriguez /* 767fb1fc7adSLuis R. Rodriguez * This gaurantees the driver's requested regulatory domain 768f976376dSLuis R. Rodriguez * will always be used as a base for further regulatory 769fb1fc7adSLuis R. Rodriguez * settings 770fb1fc7adSLuis R. Rodriguez */ 771f976376dSLuis R. Rodriguez chan->flags = chan->orig_flags = 772038659e7SLuis R. Rodriguez map_regdom_flags(reg_rule->flags) | bw_flags; 773f976376dSLuis R. Rodriguez chan->max_antenna_gain = chan->orig_mag = 774f976376dSLuis R. Rodriguez (int) MBI_TO_DBI(power_rule->max_antenna_gain); 775f976376dSLuis R. Rodriguez chan->max_power = chan->orig_mpwr = 776f976376dSLuis R. Rodriguez (int) MBM_TO_DBM(power_rule->max_eirp); 777f976376dSLuis R. Rodriguez return; 778f976376dSLuis R. Rodriguez } 779f976376dSLuis R. Rodriguez 780038659e7SLuis R. Rodriguez chan->flags = flags | bw_flags | map_regdom_flags(reg_rule->flags); 7818318d78aSJohannes Berg chan->max_antenna_gain = min(chan->orig_mag, 782b2e1b302SLuis R. Rodriguez (int) MBI_TO_DBI(power_rule->max_antenna_gain)); 783253898c4SJohn W. Linville if (chan->orig_mpwr) 784b2e1b302SLuis R. Rodriguez chan->max_power = min(chan->orig_mpwr, 785b2e1b302SLuis R. Rodriguez (int) MBM_TO_DBM(power_rule->max_eirp)); 786253898c4SJohn W. Linville else 787b2e1b302SLuis R. Rodriguez chan->max_power = (int) MBM_TO_DBM(power_rule->max_eirp); 7888318d78aSJohannes Berg } 7898318d78aSJohannes Berg 790a92a3ce7SLuis R. Rodriguez static void handle_band(struct wiphy *wiphy, enum ieee80211_band band) 7918318d78aSJohannes Berg { 792a92a3ce7SLuis R. Rodriguez unsigned int i; 793a92a3ce7SLuis R. Rodriguez struct ieee80211_supported_band *sband; 794a92a3ce7SLuis R. Rodriguez 795a92a3ce7SLuis R. Rodriguez BUG_ON(!wiphy->bands[band]); 796a92a3ce7SLuis R. Rodriguez sband = wiphy->bands[band]; 7978318d78aSJohannes Berg 7988318d78aSJohannes Berg for (i = 0; i < sband->n_channels; i++) 799a92a3ce7SLuis R. Rodriguez handle_channel(wiphy, band, i); 8008318d78aSJohannes Berg } 8018318d78aSJohannes Berg 8027db90f4aSLuis R. Rodriguez static bool ignore_reg_update(struct wiphy *wiphy, 8037db90f4aSLuis R. Rodriguez enum nl80211_reg_initiator initiator) 80414b9815aSLuis R. Rodriguez { 80514b9815aSLuis R. Rodriguez if (!last_request) 80614b9815aSLuis R. Rodriguez return true; 8077db90f4aSLuis R. Rodriguez if (initiator == NL80211_REGDOM_SET_BY_CORE && 8085be83de5SJohannes Berg wiphy->flags & WIPHY_FLAG_CUSTOM_REGULATORY) 80914b9815aSLuis R. Rodriguez return true; 810fb1fc7adSLuis R. Rodriguez /* 811fb1fc7adSLuis R. Rodriguez * wiphy->regd will be set once the device has its own 812fb1fc7adSLuis R. Rodriguez * desired regulatory domain set 813fb1fc7adSLuis R. Rodriguez */ 8145be83de5SJohannes Berg if (wiphy->flags & WIPHY_FLAG_STRICT_REGULATORY && !wiphy->regd && 815f976376dSLuis R. Rodriguez !is_world_regdom(last_request->alpha2)) 81614b9815aSLuis R. Rodriguez return true; 81714b9815aSLuis R. Rodriguez return false; 81814b9815aSLuis R. Rodriguez } 81914b9815aSLuis R. Rodriguez 8207db90f4aSLuis R. Rodriguez static void update_all_wiphy_regulatory(enum nl80211_reg_initiator initiator) 821b2e1b302SLuis R. Rodriguez { 82279c97e97SJohannes Berg struct cfg80211_registered_device *rdev; 823b2e1b302SLuis R. Rodriguez 82479c97e97SJohannes Berg list_for_each_entry(rdev, &cfg80211_rdev_list, list) 82579c97e97SJohannes Berg wiphy_update_regulatory(&rdev->wiphy, initiator); 826b2e1b302SLuis R. Rodriguez } 827b2e1b302SLuis R. Rodriguez 828e38f8a7aSLuis R. Rodriguez static void handle_reg_beacon(struct wiphy *wiphy, 829e38f8a7aSLuis R. Rodriguez unsigned int chan_idx, 830e38f8a7aSLuis R. Rodriguez struct reg_beacon *reg_beacon) 831e38f8a7aSLuis R. Rodriguez { 832e38f8a7aSLuis R. Rodriguez struct ieee80211_supported_band *sband; 833e38f8a7aSLuis R. Rodriguez struct ieee80211_channel *chan; 8346bad8766SLuis R. Rodriguez bool channel_changed = false; 8356bad8766SLuis R. Rodriguez struct ieee80211_channel chan_before; 836e38f8a7aSLuis R. Rodriguez 837e38f8a7aSLuis R. Rodriguez assert_cfg80211_lock(); 838e38f8a7aSLuis R. Rodriguez 839e38f8a7aSLuis R. Rodriguez sband = wiphy->bands[reg_beacon->chan.band]; 840e38f8a7aSLuis R. Rodriguez chan = &sband->channels[chan_idx]; 841e38f8a7aSLuis R. Rodriguez 842e38f8a7aSLuis R. Rodriguez if (likely(chan->center_freq != reg_beacon->chan.center_freq)) 843e38f8a7aSLuis R. Rodriguez return; 844e38f8a7aSLuis R. Rodriguez 8456bad8766SLuis R. Rodriguez if (chan->beacon_found) 8466bad8766SLuis R. Rodriguez return; 8476bad8766SLuis R. Rodriguez 8486bad8766SLuis R. Rodriguez chan->beacon_found = true; 8496bad8766SLuis R. Rodriguez 8505be83de5SJohannes Berg if (wiphy->flags & WIPHY_FLAG_DISABLE_BEACON_HINTS) 85137184244SLuis R. Rodriguez return; 85237184244SLuis R. Rodriguez 8536bad8766SLuis R. Rodriguez chan_before.center_freq = chan->center_freq; 8546bad8766SLuis R. Rodriguez chan_before.flags = chan->flags; 8556bad8766SLuis R. Rodriguez 85637184244SLuis R. Rodriguez if (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN) { 857e38f8a7aSLuis R. Rodriguez chan->flags &= ~IEEE80211_CHAN_PASSIVE_SCAN; 8586bad8766SLuis R. Rodriguez channel_changed = true; 859e38f8a7aSLuis R. Rodriguez } 860e38f8a7aSLuis R. Rodriguez 86137184244SLuis R. Rodriguez if (chan->flags & IEEE80211_CHAN_NO_IBSS) { 862e38f8a7aSLuis R. Rodriguez chan->flags &= ~IEEE80211_CHAN_NO_IBSS; 8636bad8766SLuis R. Rodriguez channel_changed = true; 864e38f8a7aSLuis R. Rodriguez } 865e38f8a7aSLuis R. Rodriguez 8666bad8766SLuis R. Rodriguez if (channel_changed) 8676bad8766SLuis R. Rodriguez nl80211_send_beacon_hint_event(wiphy, &chan_before, chan); 868e38f8a7aSLuis R. Rodriguez } 869e38f8a7aSLuis R. Rodriguez 870e38f8a7aSLuis R. Rodriguez /* 871e38f8a7aSLuis R. Rodriguez * Called when a scan on a wiphy finds a beacon on 872e38f8a7aSLuis R. Rodriguez * new channel 873e38f8a7aSLuis R. Rodriguez */ 874e38f8a7aSLuis R. Rodriguez static void wiphy_update_new_beacon(struct wiphy *wiphy, 875e38f8a7aSLuis R. Rodriguez struct reg_beacon *reg_beacon) 876e38f8a7aSLuis R. Rodriguez { 877e38f8a7aSLuis R. Rodriguez unsigned int i; 878e38f8a7aSLuis R. Rodriguez struct ieee80211_supported_band *sband; 879e38f8a7aSLuis R. Rodriguez 880e38f8a7aSLuis R. Rodriguez assert_cfg80211_lock(); 881e38f8a7aSLuis R. Rodriguez 882e38f8a7aSLuis R. Rodriguez if (!wiphy->bands[reg_beacon->chan.band]) 883e38f8a7aSLuis R. Rodriguez return; 884e38f8a7aSLuis R. Rodriguez 885e38f8a7aSLuis R. Rodriguez sband = wiphy->bands[reg_beacon->chan.band]; 886e38f8a7aSLuis R. Rodriguez 887e38f8a7aSLuis R. Rodriguez for (i = 0; i < sband->n_channels; i++) 888e38f8a7aSLuis R. Rodriguez handle_reg_beacon(wiphy, i, reg_beacon); 889e38f8a7aSLuis R. Rodriguez } 890e38f8a7aSLuis R. Rodriguez 891e38f8a7aSLuis R. Rodriguez /* 892e38f8a7aSLuis R. Rodriguez * Called upon reg changes or a new wiphy is added 893e38f8a7aSLuis R. Rodriguez */ 894e38f8a7aSLuis R. Rodriguez static void wiphy_update_beacon_reg(struct wiphy *wiphy) 895e38f8a7aSLuis R. Rodriguez { 896e38f8a7aSLuis R. Rodriguez unsigned int i; 897e38f8a7aSLuis R. Rodriguez struct ieee80211_supported_band *sband; 898e38f8a7aSLuis R. Rodriguez struct reg_beacon *reg_beacon; 899e38f8a7aSLuis R. Rodriguez 900e38f8a7aSLuis R. Rodriguez assert_cfg80211_lock(); 901e38f8a7aSLuis R. Rodriguez 902e38f8a7aSLuis R. Rodriguez if (list_empty(®_beacon_list)) 903e38f8a7aSLuis R. Rodriguez return; 904e38f8a7aSLuis R. Rodriguez 905e38f8a7aSLuis R. Rodriguez list_for_each_entry(reg_beacon, ®_beacon_list, list) { 906e38f8a7aSLuis R. Rodriguez if (!wiphy->bands[reg_beacon->chan.band]) 907e38f8a7aSLuis R. Rodriguez continue; 908e38f8a7aSLuis R. Rodriguez sband = wiphy->bands[reg_beacon->chan.band]; 909e38f8a7aSLuis R. Rodriguez for (i = 0; i < sband->n_channels; i++) 910e38f8a7aSLuis R. Rodriguez handle_reg_beacon(wiphy, i, reg_beacon); 911e38f8a7aSLuis R. Rodriguez } 912e38f8a7aSLuis R. Rodriguez } 913e38f8a7aSLuis R. Rodriguez 914e38f8a7aSLuis R. Rodriguez static bool reg_is_world_roaming(struct wiphy *wiphy) 915e38f8a7aSLuis R. Rodriguez { 916e38f8a7aSLuis R. Rodriguez if (is_world_regdom(cfg80211_regdomain->alpha2) || 917e38f8a7aSLuis R. Rodriguez (wiphy->regd && is_world_regdom(wiphy->regd->alpha2))) 918e38f8a7aSLuis R. Rodriguez return true; 919b1ed8dddSLuis R. Rodriguez if (last_request && 920b1ed8dddSLuis R. Rodriguez last_request->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && 9215be83de5SJohannes Berg wiphy->flags & WIPHY_FLAG_CUSTOM_REGULATORY) 922e38f8a7aSLuis R. Rodriguez return true; 923e38f8a7aSLuis R. Rodriguez return false; 924e38f8a7aSLuis R. Rodriguez } 925e38f8a7aSLuis R. Rodriguez 926e38f8a7aSLuis R. Rodriguez /* Reap the advantages of previously found beacons */ 927e38f8a7aSLuis R. Rodriguez static void reg_process_beacons(struct wiphy *wiphy) 928e38f8a7aSLuis R. Rodriguez { 929b1ed8dddSLuis R. Rodriguez /* 930b1ed8dddSLuis R. Rodriguez * Means we are just firing up cfg80211, so no beacons would 931b1ed8dddSLuis R. Rodriguez * have been processed yet. 932b1ed8dddSLuis R. Rodriguez */ 933b1ed8dddSLuis R. Rodriguez if (!last_request) 934b1ed8dddSLuis R. Rodriguez return; 935e38f8a7aSLuis R. Rodriguez if (!reg_is_world_roaming(wiphy)) 936e38f8a7aSLuis R. Rodriguez return; 937e38f8a7aSLuis R. Rodriguez wiphy_update_beacon_reg(wiphy); 938e38f8a7aSLuis R. Rodriguez } 939e38f8a7aSLuis R. Rodriguez 940038659e7SLuis R. Rodriguez static bool is_ht40_not_allowed(struct ieee80211_channel *chan) 941038659e7SLuis R. Rodriguez { 942038659e7SLuis R. Rodriguez if (!chan) 943038659e7SLuis R. Rodriguez return true; 944038659e7SLuis R. Rodriguez if (chan->flags & IEEE80211_CHAN_DISABLED) 945038659e7SLuis R. Rodriguez return true; 946038659e7SLuis R. Rodriguez /* This would happen when regulatory rules disallow HT40 completely */ 947038659e7SLuis R. Rodriguez if (IEEE80211_CHAN_NO_HT40 == (chan->flags & (IEEE80211_CHAN_NO_HT40))) 948038659e7SLuis R. Rodriguez return true; 949038659e7SLuis R. Rodriguez return false; 950038659e7SLuis R. Rodriguez } 951038659e7SLuis R. Rodriguez 952038659e7SLuis R. Rodriguez static void reg_process_ht_flags_channel(struct wiphy *wiphy, 953038659e7SLuis R. Rodriguez enum ieee80211_band band, 954038659e7SLuis R. Rodriguez unsigned int chan_idx) 955038659e7SLuis R. Rodriguez { 956038659e7SLuis R. Rodriguez struct ieee80211_supported_band *sband; 957038659e7SLuis R. Rodriguez struct ieee80211_channel *channel; 958038659e7SLuis R. Rodriguez struct ieee80211_channel *channel_before = NULL, *channel_after = NULL; 959038659e7SLuis R. Rodriguez unsigned int i; 960038659e7SLuis R. Rodriguez 961038659e7SLuis R. Rodriguez assert_cfg80211_lock(); 962038659e7SLuis R. Rodriguez 963038659e7SLuis R. Rodriguez sband = wiphy->bands[band]; 964038659e7SLuis R. Rodriguez BUG_ON(chan_idx >= sband->n_channels); 965038659e7SLuis R. Rodriguez channel = &sband->channels[chan_idx]; 966038659e7SLuis R. Rodriguez 967038659e7SLuis R. Rodriguez if (is_ht40_not_allowed(channel)) { 968038659e7SLuis R. Rodriguez channel->flags |= IEEE80211_CHAN_NO_HT40; 969038659e7SLuis R. Rodriguez return; 970038659e7SLuis R. Rodriguez } 971038659e7SLuis R. Rodriguez 972038659e7SLuis R. Rodriguez /* 973038659e7SLuis R. Rodriguez * We need to ensure the extension channels exist to 974038659e7SLuis R. Rodriguez * be able to use HT40- or HT40+, this finds them (or not) 975038659e7SLuis R. Rodriguez */ 976038659e7SLuis R. Rodriguez for (i = 0; i < sband->n_channels; i++) { 977038659e7SLuis R. Rodriguez struct ieee80211_channel *c = &sband->channels[i]; 978038659e7SLuis R. Rodriguez if (c->center_freq == (channel->center_freq - 20)) 979038659e7SLuis R. Rodriguez channel_before = c; 980038659e7SLuis R. Rodriguez if (c->center_freq == (channel->center_freq + 20)) 981038659e7SLuis R. Rodriguez channel_after = c; 982038659e7SLuis R. Rodriguez } 983038659e7SLuis R. Rodriguez 984038659e7SLuis R. Rodriguez /* 985038659e7SLuis R. Rodriguez * Please note that this assumes target bandwidth is 20 MHz, 986038659e7SLuis R. Rodriguez * if that ever changes we also need to change the below logic 987038659e7SLuis R. Rodriguez * to include that as well. 988038659e7SLuis R. Rodriguez */ 989038659e7SLuis R. Rodriguez if (is_ht40_not_allowed(channel_before)) 990689da1b3SLuis R. Rodriguez channel->flags |= IEEE80211_CHAN_NO_HT40MINUS; 991038659e7SLuis R. Rodriguez else 992689da1b3SLuis R. Rodriguez channel->flags &= ~IEEE80211_CHAN_NO_HT40MINUS; 993038659e7SLuis R. Rodriguez 994038659e7SLuis R. Rodriguez if (is_ht40_not_allowed(channel_after)) 995689da1b3SLuis R. Rodriguez channel->flags |= IEEE80211_CHAN_NO_HT40PLUS; 996038659e7SLuis R. Rodriguez else 997689da1b3SLuis R. Rodriguez channel->flags &= ~IEEE80211_CHAN_NO_HT40PLUS; 998038659e7SLuis R. Rodriguez } 999038659e7SLuis R. Rodriguez 1000038659e7SLuis R. Rodriguez static void reg_process_ht_flags_band(struct wiphy *wiphy, 1001038659e7SLuis R. Rodriguez enum ieee80211_band band) 1002038659e7SLuis R. Rodriguez { 1003038659e7SLuis R. Rodriguez unsigned int i; 1004038659e7SLuis R. Rodriguez struct ieee80211_supported_band *sband; 1005038659e7SLuis R. Rodriguez 1006038659e7SLuis R. Rodriguez BUG_ON(!wiphy->bands[band]); 1007038659e7SLuis R. Rodriguez sband = wiphy->bands[band]; 1008038659e7SLuis R. Rodriguez 1009038659e7SLuis R. Rodriguez for (i = 0; i < sband->n_channels; i++) 1010038659e7SLuis R. Rodriguez reg_process_ht_flags_channel(wiphy, band, i); 1011038659e7SLuis R. Rodriguez } 1012038659e7SLuis R. Rodriguez 1013038659e7SLuis R. Rodriguez static void reg_process_ht_flags(struct wiphy *wiphy) 1014038659e7SLuis R. Rodriguez { 1015038659e7SLuis R. Rodriguez enum ieee80211_band band; 1016038659e7SLuis R. Rodriguez 1017038659e7SLuis R. Rodriguez if (!wiphy) 1018038659e7SLuis R. Rodriguez return; 1019038659e7SLuis R. Rodriguez 1020038659e7SLuis R. Rodriguez for (band = 0; band < IEEE80211_NUM_BANDS; band++) { 1021038659e7SLuis R. Rodriguez if (wiphy->bands[band]) 1022038659e7SLuis R. Rodriguez reg_process_ht_flags_band(wiphy, band); 1023038659e7SLuis R. Rodriguez } 1024038659e7SLuis R. Rodriguez 1025038659e7SLuis R. Rodriguez } 1026038659e7SLuis R. Rodriguez 10277db90f4aSLuis R. Rodriguez void wiphy_update_regulatory(struct wiphy *wiphy, 10287db90f4aSLuis R. Rodriguez enum nl80211_reg_initiator initiator) 10298318d78aSJohannes Berg { 10308318d78aSJohannes Berg enum ieee80211_band band; 1031d46e5b1dSLuis R. Rodriguez 10327db90f4aSLuis R. Rodriguez if (ignore_reg_update(wiphy, initiator)) 1033e38f8a7aSLuis R. Rodriguez goto out; 1034b2e1b302SLuis R. Rodriguez for (band = 0; band < IEEE80211_NUM_BANDS; band++) { 10358318d78aSJohannes Berg if (wiphy->bands[band]) 1036a92a3ce7SLuis R. Rodriguez handle_band(wiphy, band); 1037b2e1b302SLuis R. Rodriguez } 1038e38f8a7aSLuis R. Rodriguez out: 1039e38f8a7aSLuis R. Rodriguez reg_process_beacons(wiphy); 1040038659e7SLuis R. Rodriguez reg_process_ht_flags(wiphy); 1041b2e1b302SLuis R. Rodriguez if (wiphy->reg_notifier) 1042716f9392SLuis R. Rodriguez wiphy->reg_notifier(wiphy, last_request); 1043b2e1b302SLuis R. Rodriguez } 1044b2e1b302SLuis R. Rodriguez 10451fa25e41SLuis R. Rodriguez static void handle_channel_custom(struct wiphy *wiphy, 10461fa25e41SLuis R. Rodriguez enum ieee80211_band band, 10471fa25e41SLuis R. Rodriguez unsigned int chan_idx, 10481fa25e41SLuis R. Rodriguez const struct ieee80211_regdomain *regd) 10491fa25e41SLuis R. Rodriguez { 10501fa25e41SLuis R. Rodriguez int r; 1051038659e7SLuis R. Rodriguez u32 desired_bw_khz = MHZ_TO_KHZ(20); 1052038659e7SLuis R. Rodriguez u32 bw_flags = 0; 10531fa25e41SLuis R. Rodriguez const struct ieee80211_reg_rule *reg_rule = NULL; 10541fa25e41SLuis R. Rodriguez const struct ieee80211_power_rule *power_rule = NULL; 1055038659e7SLuis R. Rodriguez const struct ieee80211_freq_range *freq_range = NULL; 10561fa25e41SLuis R. Rodriguez struct ieee80211_supported_band *sband; 10571fa25e41SLuis R. Rodriguez struct ieee80211_channel *chan; 10581fa25e41SLuis R. Rodriguez 1059abc7381bSLuis R. Rodriguez assert_reg_lock(); 1060ac46d48eSLuis R. Rodriguez 10611fa25e41SLuis R. Rodriguez sband = wiphy->bands[band]; 10621fa25e41SLuis R. Rodriguez BUG_ON(chan_idx >= sband->n_channels); 10631fa25e41SLuis R. Rodriguez chan = &sband->channels[chan_idx]; 10641fa25e41SLuis R. Rodriguez 1065038659e7SLuis R. Rodriguez r = freq_reg_info_regd(wiphy, 1066038659e7SLuis R. Rodriguez MHZ_TO_KHZ(chan->center_freq), 1067038659e7SLuis R. Rodriguez desired_bw_khz, 1068038659e7SLuis R. Rodriguez ®_rule, 1069038659e7SLuis R. Rodriguez regd); 10701fa25e41SLuis R. Rodriguez 10711fa25e41SLuis R. Rodriguez if (r) { 10721fa25e41SLuis R. Rodriguez chan->flags = IEEE80211_CHAN_DISABLED; 10731fa25e41SLuis R. Rodriguez return; 10741fa25e41SLuis R. Rodriguez } 10751fa25e41SLuis R. Rodriguez 10761fa25e41SLuis R. Rodriguez power_rule = ®_rule->power_rule; 1077038659e7SLuis R. Rodriguez freq_range = ®_rule->freq_range; 10781fa25e41SLuis R. Rodriguez 1079038659e7SLuis R. Rodriguez if (freq_range->max_bandwidth_khz < MHZ_TO_KHZ(40)) 1080038659e7SLuis R. Rodriguez bw_flags = IEEE80211_CHAN_NO_HT40; 1081038659e7SLuis R. Rodriguez 1082038659e7SLuis R. Rodriguez chan->flags |= map_regdom_flags(reg_rule->flags) | bw_flags; 10831fa25e41SLuis R. Rodriguez chan->max_antenna_gain = (int) MBI_TO_DBI(power_rule->max_antenna_gain); 10841fa25e41SLuis R. Rodriguez chan->max_power = (int) MBM_TO_DBM(power_rule->max_eirp); 10851fa25e41SLuis R. Rodriguez } 10861fa25e41SLuis R. Rodriguez 10871fa25e41SLuis R. Rodriguez static void handle_band_custom(struct wiphy *wiphy, enum ieee80211_band band, 10881fa25e41SLuis R. Rodriguez const struct ieee80211_regdomain *regd) 10891fa25e41SLuis R. Rodriguez { 10901fa25e41SLuis R. Rodriguez unsigned int i; 10911fa25e41SLuis R. Rodriguez struct ieee80211_supported_band *sband; 10921fa25e41SLuis R. Rodriguez 10931fa25e41SLuis R. Rodriguez BUG_ON(!wiphy->bands[band]); 10941fa25e41SLuis R. Rodriguez sband = wiphy->bands[band]; 10951fa25e41SLuis R. Rodriguez 10961fa25e41SLuis R. Rodriguez for (i = 0; i < sband->n_channels; i++) 10971fa25e41SLuis R. Rodriguez handle_channel_custom(wiphy, band, i, regd); 10981fa25e41SLuis R. Rodriguez } 10991fa25e41SLuis R. Rodriguez 11001fa25e41SLuis R. Rodriguez /* Used by drivers prior to wiphy registration */ 11011fa25e41SLuis R. Rodriguez void wiphy_apply_custom_regulatory(struct wiphy *wiphy, 11021fa25e41SLuis R. Rodriguez const struct ieee80211_regdomain *regd) 11031fa25e41SLuis R. Rodriguez { 11041fa25e41SLuis R. Rodriguez enum ieee80211_band band; 1105bbcf3f02SLuis R. Rodriguez unsigned int bands_set = 0; 1106ac46d48eSLuis R. Rodriguez 1107abc7381bSLuis R. Rodriguez mutex_lock(®_mutex); 11081fa25e41SLuis R. Rodriguez for (band = 0; band < IEEE80211_NUM_BANDS; band++) { 1109bbcf3f02SLuis R. Rodriguez if (!wiphy->bands[band]) 1110bbcf3f02SLuis R. Rodriguez continue; 11111fa25e41SLuis R. Rodriguez handle_band_custom(wiphy, band, regd); 1112bbcf3f02SLuis R. Rodriguez bands_set++; 11131fa25e41SLuis R. Rodriguez } 1114abc7381bSLuis R. Rodriguez mutex_unlock(®_mutex); 1115bbcf3f02SLuis R. Rodriguez 1116bbcf3f02SLuis R. Rodriguez /* 1117bbcf3f02SLuis R. Rodriguez * no point in calling this if it won't have any effect 1118bbcf3f02SLuis R. Rodriguez * on your device's supportd bands. 1119bbcf3f02SLuis R. Rodriguez */ 1120bbcf3f02SLuis R. Rodriguez WARN_ON(!bands_set); 11211fa25e41SLuis R. Rodriguez } 11221fa25e41SLuis R. Rodriguez EXPORT_SYMBOL(wiphy_apply_custom_regulatory); 11231fa25e41SLuis R. Rodriguez 1124fb1fc7adSLuis R. Rodriguez /* 1125fb1fc7adSLuis R. Rodriguez * Return value which can be used by ignore_request() to indicate 1126fb1fc7adSLuis R. Rodriguez * it has been determined we should intersect two regulatory domains 1127fb1fc7adSLuis R. Rodriguez */ 11289c96477dSLuis R. Rodriguez #define REG_INTERSECT 1 11299c96477dSLuis R. Rodriguez 113084fa4f43SJohannes Berg /* This has the logic which determines when a new request 113184fa4f43SJohannes Berg * should be ignored. */ 11322f92cd2eSLuis R. Rodriguez static int ignore_request(struct wiphy *wiphy, 11332f92cd2eSLuis R. Rodriguez struct regulatory_request *pending_request) 113484fa4f43SJohannes Berg { 1135806a9e39SLuis R. Rodriguez struct wiphy *last_wiphy = NULL; 1136761cf7ecSLuis R. Rodriguez 1137761cf7ecSLuis R. Rodriguez assert_cfg80211_lock(); 1138761cf7ecSLuis R. Rodriguez 113984fa4f43SJohannes Berg /* All initial requests are respected */ 114084fa4f43SJohannes Berg if (!last_request) 114184fa4f43SJohannes Berg return 0; 114284fa4f43SJohannes Berg 11432f92cd2eSLuis R. Rodriguez switch (pending_request->initiator) { 11447db90f4aSLuis R. Rodriguez case NL80211_REGDOM_SET_BY_CORE: 114509d989d1SLuis R. Rodriguez return 0; 11467db90f4aSLuis R. Rodriguez case NL80211_REGDOM_SET_BY_COUNTRY_IE: 1147806a9e39SLuis R. Rodriguez 1148806a9e39SLuis R. Rodriguez last_wiphy = wiphy_idx_to_wiphy(last_request->wiphy_idx); 1149806a9e39SLuis R. Rodriguez 11502f92cd2eSLuis R. Rodriguez if (unlikely(!is_an_alpha2(pending_request->alpha2))) 115184fa4f43SJohannes Berg return -EINVAL; 11527db90f4aSLuis R. Rodriguez if (last_request->initiator == 11537db90f4aSLuis R. Rodriguez NL80211_REGDOM_SET_BY_COUNTRY_IE) { 1154806a9e39SLuis R. Rodriguez if (last_wiphy != wiphy) { 115584fa4f43SJohannes Berg /* 115684fa4f43SJohannes Berg * Two cards with two APs claiming different 11571fe90b03SThadeu Lima de Souza Cascardo * Country IE alpha2s. We could 115884fa4f43SJohannes Berg * intersect them, but that seems unlikely 115984fa4f43SJohannes Berg * to be correct. Reject second one for now. 116084fa4f43SJohannes Berg */ 11612f92cd2eSLuis R. Rodriguez if (regdom_changes(pending_request->alpha2)) 116284fa4f43SJohannes Berg return -EOPNOTSUPP; 116384fa4f43SJohannes Berg return -EALREADY; 116484fa4f43SJohannes Berg } 1165fb1fc7adSLuis R. Rodriguez /* 1166fb1fc7adSLuis R. Rodriguez * Two consecutive Country IE hints on the same wiphy. 1167fb1fc7adSLuis R. Rodriguez * This should be picked up early by the driver/stack 1168fb1fc7adSLuis R. Rodriguez */ 11692f92cd2eSLuis R. Rodriguez if (WARN_ON(regdom_changes(pending_request->alpha2))) 117084fa4f43SJohannes Berg return 0; 117184fa4f43SJohannes Berg return -EALREADY; 117284fa4f43SJohannes Berg } 11733f2355cbSLuis R. Rodriguez return REG_INTERSECT; 11747db90f4aSLuis R. Rodriguez case NL80211_REGDOM_SET_BY_DRIVER: 11757db90f4aSLuis R. Rodriguez if (last_request->initiator == NL80211_REGDOM_SET_BY_CORE) { 11762f92cd2eSLuis R. Rodriguez if (regdom_changes(pending_request->alpha2)) 1177e74b1e7fSLuis R. Rodriguez return 0; 1178e74b1e7fSLuis R. Rodriguez return -EALREADY; 1179e74b1e7fSLuis R. Rodriguez } 1180fff32c04SLuis R. Rodriguez 1181fff32c04SLuis R. Rodriguez /* 1182fff32c04SLuis R. Rodriguez * This would happen if you unplug and plug your card 1183fff32c04SLuis R. Rodriguez * back in or if you add a new device for which the previously 1184fff32c04SLuis R. Rodriguez * loaded card also agrees on the regulatory domain. 1185fff32c04SLuis R. Rodriguez */ 11867db90f4aSLuis R. Rodriguez if (last_request->initiator == NL80211_REGDOM_SET_BY_DRIVER && 11872f92cd2eSLuis R. Rodriguez !regdom_changes(pending_request->alpha2)) 1188fff32c04SLuis R. Rodriguez return -EALREADY; 1189fff32c04SLuis R. Rodriguez 11903e0c3ff3SLuis R. Rodriguez return REG_INTERSECT; 11917db90f4aSLuis R. Rodriguez case NL80211_REGDOM_SET_BY_USER: 11927db90f4aSLuis R. Rodriguez if (last_request->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) 11939c96477dSLuis R. Rodriguez return REG_INTERSECT; 1194fb1fc7adSLuis R. Rodriguez /* 1195fb1fc7adSLuis R. Rodriguez * If the user knows better the user should set the regdom 1196fb1fc7adSLuis R. Rodriguez * to their country before the IE is picked up 1197fb1fc7adSLuis R. Rodriguez */ 11987db90f4aSLuis R. Rodriguez if (last_request->initiator == NL80211_REGDOM_SET_BY_USER && 11993f2355cbSLuis R. Rodriguez last_request->intersect) 12003f2355cbSLuis R. Rodriguez return -EOPNOTSUPP; 1201fb1fc7adSLuis R. Rodriguez /* 1202fb1fc7adSLuis R. Rodriguez * Process user requests only after previous user/driver/core 1203fb1fc7adSLuis R. Rodriguez * requests have been processed 1204fb1fc7adSLuis R. Rodriguez */ 12057db90f4aSLuis R. Rodriguez if (last_request->initiator == NL80211_REGDOM_SET_BY_CORE || 12067db90f4aSLuis R. Rodriguez last_request->initiator == NL80211_REGDOM_SET_BY_DRIVER || 12077db90f4aSLuis R. Rodriguez last_request->initiator == NL80211_REGDOM_SET_BY_USER) { 120869b1572bSLuis R. Rodriguez if (regdom_changes(last_request->alpha2)) 12095eebade6SLuis R. Rodriguez return -EAGAIN; 12105eebade6SLuis R. Rodriguez } 12115eebade6SLuis R. Rodriguez 1212baeb66feSJohn W. Linville if (!regdom_changes(pending_request->alpha2)) 1213e74b1e7fSLuis R. Rodriguez return -EALREADY; 1214e74b1e7fSLuis R. Rodriguez 121584fa4f43SJohannes Berg return 0; 121684fa4f43SJohannes Berg } 121784fa4f43SJohannes Berg 121884fa4f43SJohannes Berg return -EINVAL; 121984fa4f43SJohannes Berg } 122084fa4f43SJohannes Berg 1221d1c96a9aSLuis R. Rodriguez /** 1222d1c96a9aSLuis R. Rodriguez * __regulatory_hint - hint to the wireless core a regulatory domain 1223d1c96a9aSLuis R. Rodriguez * @wiphy: if the hint comes from country information from an AP, this 1224d1c96a9aSLuis R. Rodriguez * is required to be set to the wiphy that received the information 122528da32d7SLuis R. Rodriguez * @pending_request: the regulatory request currently being processed 1226d1c96a9aSLuis R. Rodriguez * 1227d1c96a9aSLuis R. Rodriguez * The Wireless subsystem can use this function to hint to the wireless core 122828da32d7SLuis R. Rodriguez * what it believes should be the current regulatory domain. 1229d1c96a9aSLuis R. Rodriguez * 1230d1c96a9aSLuis R. Rodriguez * Returns zero if all went fine, %-EALREADY if a regulatory domain had 1231d1c96a9aSLuis R. Rodriguez * already been set or other standard error codes. 1232d1c96a9aSLuis R. Rodriguez * 1233abc7381bSLuis R. Rodriguez * Caller must hold &cfg80211_mutex and ®_mutex 1234d1c96a9aSLuis R. Rodriguez */ 123528da32d7SLuis R. Rodriguez static int __regulatory_hint(struct wiphy *wiphy, 123628da32d7SLuis R. Rodriguez struct regulatory_request *pending_request) 1237b2e1b302SLuis R. Rodriguez { 12389c96477dSLuis R. Rodriguez bool intersect = false; 1239b2e1b302SLuis R. Rodriguez int r = 0; 1240b2e1b302SLuis R. Rodriguez 1241761cf7ecSLuis R. Rodriguez assert_cfg80211_lock(); 1242761cf7ecSLuis R. Rodriguez 12432f92cd2eSLuis R. Rodriguez r = ignore_request(wiphy, pending_request); 12449c96477dSLuis R. Rodriguez 12453e0c3ff3SLuis R. Rodriguez if (r == REG_INTERSECT) { 12467db90f4aSLuis R. Rodriguez if (pending_request->initiator == 12477db90f4aSLuis R. Rodriguez NL80211_REGDOM_SET_BY_DRIVER) { 12483e0c3ff3SLuis R. Rodriguez r = reg_copy_regd(&wiphy->regd, cfg80211_regdomain); 1249d951c1ddSLuis R. Rodriguez if (r) { 1250d951c1ddSLuis R. Rodriguez kfree(pending_request); 1251b2e1b302SLuis R. Rodriguez return r; 12523e0c3ff3SLuis R. Rodriguez } 1253d951c1ddSLuis R. Rodriguez } 12543e0c3ff3SLuis R. Rodriguez intersect = true; 12553e0c3ff3SLuis R. Rodriguez } else if (r) { 1256fb1fc7adSLuis R. Rodriguez /* 1257fb1fc7adSLuis R. Rodriguez * If the regulatory domain being requested by the 12583e0c3ff3SLuis R. Rodriguez * driver has already been set just copy it to the 1259fb1fc7adSLuis R. Rodriguez * wiphy 1260fb1fc7adSLuis R. Rodriguez */ 126128da32d7SLuis R. Rodriguez if (r == -EALREADY && 12627db90f4aSLuis R. Rodriguez pending_request->initiator == 12637db90f4aSLuis R. Rodriguez NL80211_REGDOM_SET_BY_DRIVER) { 12643e0c3ff3SLuis R. Rodriguez r = reg_copy_regd(&wiphy->regd, cfg80211_regdomain); 1265d951c1ddSLuis R. Rodriguez if (r) { 1266d951c1ddSLuis R. Rodriguez kfree(pending_request); 12673e0c3ff3SLuis R. Rodriguez return r; 1268d951c1ddSLuis R. Rodriguez } 12693e0c3ff3SLuis R. Rodriguez r = -EALREADY; 12703e0c3ff3SLuis R. Rodriguez goto new_request; 12713e0c3ff3SLuis R. Rodriguez } 1272d951c1ddSLuis R. Rodriguez kfree(pending_request); 12733e0c3ff3SLuis R. Rodriguez return r; 12743e0c3ff3SLuis R. Rodriguez } 1275b2e1b302SLuis R. Rodriguez 12763e0c3ff3SLuis R. Rodriguez new_request: 1277f6037d09SJohannes Berg kfree(last_request); 1278d951c1ddSLuis R. Rodriguez 1279d951c1ddSLuis R. Rodriguez last_request = pending_request; 1280d951c1ddSLuis R. Rodriguez last_request->intersect = intersect; 1281d951c1ddSLuis R. Rodriguez 1282d951c1ddSLuis R. Rodriguez pending_request = NULL; 12833e0c3ff3SLuis R. Rodriguez 128409d989d1SLuis R. Rodriguez if (last_request->initiator == NL80211_REGDOM_SET_BY_USER) { 128509d989d1SLuis R. Rodriguez user_alpha2[0] = last_request->alpha2[0]; 128609d989d1SLuis R. Rodriguez user_alpha2[1] = last_request->alpha2[1]; 128709d989d1SLuis R. Rodriguez } 128809d989d1SLuis R. Rodriguez 12893e0c3ff3SLuis R. Rodriguez /* When r == REG_INTERSECT we do need to call CRDA */ 129073d54c9eSLuis R. Rodriguez if (r < 0) { 129173d54c9eSLuis R. Rodriguez /* 129273d54c9eSLuis R. Rodriguez * Since CRDA will not be called in this case as we already 129373d54c9eSLuis R. Rodriguez * have applied the requested regulatory domain before we just 129473d54c9eSLuis R. Rodriguez * inform userspace we have processed the request 129573d54c9eSLuis R. Rodriguez */ 129673d54c9eSLuis R. Rodriguez if (r == -EALREADY) 129773d54c9eSLuis R. Rodriguez nl80211_send_reg_change_event(last_request); 12983e0c3ff3SLuis R. Rodriguez return r; 129973d54c9eSLuis R. Rodriguez } 13003e0c3ff3SLuis R. Rodriguez 1301d951c1ddSLuis R. Rodriguez return call_crda(last_request->alpha2); 1302b2e1b302SLuis R. Rodriguez } 1303b2e1b302SLuis R. Rodriguez 130430a548c7SLuis R. Rodriguez /* This processes *all* regulatory hints */ 1305d951c1ddSLuis R. Rodriguez static void reg_process_hint(struct regulatory_request *reg_request) 1306fe33eb39SLuis R. Rodriguez { 1307fe33eb39SLuis R. Rodriguez int r = 0; 1308fe33eb39SLuis R. Rodriguez struct wiphy *wiphy = NULL; 1309fe33eb39SLuis R. Rodriguez 1310fe33eb39SLuis R. Rodriguez BUG_ON(!reg_request->alpha2); 1311fe33eb39SLuis R. Rodriguez 1312fe33eb39SLuis R. Rodriguez mutex_lock(&cfg80211_mutex); 1313abc7381bSLuis R. Rodriguez mutex_lock(®_mutex); 1314fe33eb39SLuis R. Rodriguez 1315fe33eb39SLuis R. Rodriguez if (wiphy_idx_valid(reg_request->wiphy_idx)) 1316fe33eb39SLuis R. Rodriguez wiphy = wiphy_idx_to_wiphy(reg_request->wiphy_idx); 1317fe33eb39SLuis R. Rodriguez 13187db90f4aSLuis R. Rodriguez if (reg_request->initiator == NL80211_REGDOM_SET_BY_DRIVER && 1319fe33eb39SLuis R. Rodriguez !wiphy) { 1320d951c1ddSLuis R. Rodriguez kfree(reg_request); 1321fe33eb39SLuis R. Rodriguez goto out; 1322fe33eb39SLuis R. Rodriguez } 1323fe33eb39SLuis R. Rodriguez 132428da32d7SLuis R. Rodriguez r = __regulatory_hint(wiphy, reg_request); 1325fe33eb39SLuis R. Rodriguez /* This is required so that the orig_* parameters are saved */ 13265be83de5SJohannes Berg if (r == -EALREADY && wiphy && 13275be83de5SJohannes Berg wiphy->flags & WIPHY_FLAG_STRICT_REGULATORY) 1328fe33eb39SLuis R. Rodriguez wiphy_update_regulatory(wiphy, reg_request->initiator); 1329fe33eb39SLuis R. Rodriguez out: 1330abc7381bSLuis R. Rodriguez mutex_unlock(®_mutex); 1331fe33eb39SLuis R. Rodriguez mutex_unlock(&cfg80211_mutex); 1332fe33eb39SLuis R. Rodriguez } 1333fe33eb39SLuis R. Rodriguez 13347db90f4aSLuis R. Rodriguez /* Processes regulatory hints, this is all the NL80211_REGDOM_SET_BY_* */ 1335fe33eb39SLuis R. Rodriguez static void reg_process_pending_hints(void) 1336fe33eb39SLuis R. Rodriguez { 1337fe33eb39SLuis R. Rodriguez struct regulatory_request *reg_request; 1338fe33eb39SLuis R. Rodriguez 1339fe33eb39SLuis R. Rodriguez spin_lock(®_requests_lock); 1340fe33eb39SLuis R. Rodriguez while (!list_empty(®_requests_list)) { 1341fe33eb39SLuis R. Rodriguez reg_request = list_first_entry(®_requests_list, 1342fe33eb39SLuis R. Rodriguez struct regulatory_request, 1343fe33eb39SLuis R. Rodriguez list); 1344fe33eb39SLuis R. Rodriguez list_del_init(®_request->list); 1345fe33eb39SLuis R. Rodriguez 1346d951c1ddSLuis R. Rodriguez spin_unlock(®_requests_lock); 1347d951c1ddSLuis R. Rodriguez reg_process_hint(reg_request); 1348fe33eb39SLuis R. Rodriguez spin_lock(®_requests_lock); 1349fe33eb39SLuis R. Rodriguez } 1350fe33eb39SLuis R. Rodriguez spin_unlock(®_requests_lock); 1351fe33eb39SLuis R. Rodriguez } 1352fe33eb39SLuis R. Rodriguez 1353e38f8a7aSLuis R. Rodriguez /* Processes beacon hints -- this has nothing to do with country IEs */ 1354e38f8a7aSLuis R. Rodriguez static void reg_process_pending_beacon_hints(void) 1355e38f8a7aSLuis R. Rodriguez { 135679c97e97SJohannes Berg struct cfg80211_registered_device *rdev; 1357e38f8a7aSLuis R. Rodriguez struct reg_beacon *pending_beacon, *tmp; 1358e38f8a7aSLuis R. Rodriguez 1359abc7381bSLuis R. Rodriguez /* 1360abc7381bSLuis R. Rodriguez * No need to hold the reg_mutex here as we just touch wiphys 1361abc7381bSLuis R. Rodriguez * and do not read or access regulatory variables. 1362abc7381bSLuis R. Rodriguez */ 1363e38f8a7aSLuis R. Rodriguez mutex_lock(&cfg80211_mutex); 1364e38f8a7aSLuis R. Rodriguez 1365e38f8a7aSLuis R. Rodriguez /* This goes through the _pending_ beacon list */ 1366e38f8a7aSLuis R. Rodriguez spin_lock_bh(®_pending_beacons_lock); 1367e38f8a7aSLuis R. Rodriguez 1368e38f8a7aSLuis R. Rodriguez if (list_empty(®_pending_beacons)) { 1369e38f8a7aSLuis R. Rodriguez spin_unlock_bh(®_pending_beacons_lock); 1370e38f8a7aSLuis R. Rodriguez goto out; 1371e38f8a7aSLuis R. Rodriguez } 1372e38f8a7aSLuis R. Rodriguez 1373e38f8a7aSLuis R. Rodriguez list_for_each_entry_safe(pending_beacon, tmp, 1374e38f8a7aSLuis R. Rodriguez ®_pending_beacons, list) { 1375e38f8a7aSLuis R. Rodriguez 1376e38f8a7aSLuis R. Rodriguez list_del_init(&pending_beacon->list); 1377e38f8a7aSLuis R. Rodriguez 1378e38f8a7aSLuis R. Rodriguez /* Applies the beacon hint to current wiphys */ 137979c97e97SJohannes Berg list_for_each_entry(rdev, &cfg80211_rdev_list, list) 138079c97e97SJohannes Berg wiphy_update_new_beacon(&rdev->wiphy, pending_beacon); 1381e38f8a7aSLuis R. Rodriguez 1382e38f8a7aSLuis R. Rodriguez /* Remembers the beacon hint for new wiphys or reg changes */ 1383e38f8a7aSLuis R. Rodriguez list_add_tail(&pending_beacon->list, ®_beacon_list); 1384e38f8a7aSLuis R. Rodriguez } 1385e38f8a7aSLuis R. Rodriguez 1386e38f8a7aSLuis R. Rodriguez spin_unlock_bh(®_pending_beacons_lock); 1387e38f8a7aSLuis R. Rodriguez out: 1388e38f8a7aSLuis R. Rodriguez mutex_unlock(&cfg80211_mutex); 1389e38f8a7aSLuis R. Rodriguez } 1390e38f8a7aSLuis R. Rodriguez 1391fe33eb39SLuis R. Rodriguez static void reg_todo(struct work_struct *work) 1392fe33eb39SLuis R. Rodriguez { 1393fe33eb39SLuis R. Rodriguez reg_process_pending_hints(); 1394e38f8a7aSLuis R. Rodriguez reg_process_pending_beacon_hints(); 1395fe33eb39SLuis R. Rodriguez } 1396fe33eb39SLuis R. Rodriguez 1397fe33eb39SLuis R. Rodriguez static DECLARE_WORK(reg_work, reg_todo); 1398fe33eb39SLuis R. Rodriguez 1399fe33eb39SLuis R. Rodriguez static void queue_regulatory_request(struct regulatory_request *request) 1400fe33eb39SLuis R. Rodriguez { 1401fe33eb39SLuis R. Rodriguez spin_lock(®_requests_lock); 1402fe33eb39SLuis R. Rodriguez list_add_tail(&request->list, ®_requests_list); 1403fe33eb39SLuis R. Rodriguez spin_unlock(®_requests_lock); 1404fe33eb39SLuis R. Rodriguez 1405fe33eb39SLuis R. Rodriguez schedule_work(®_work); 1406fe33eb39SLuis R. Rodriguez } 1407fe33eb39SLuis R. Rodriguez 140809d989d1SLuis R. Rodriguez /* 140909d989d1SLuis R. Rodriguez * Core regulatory hint -- happens during cfg80211_init() 141009d989d1SLuis R. Rodriguez * and when we restore regulatory settings. 141109d989d1SLuis R. Rodriguez */ 1412ba25c141SLuis R. Rodriguez static int regulatory_hint_core(const char *alpha2) 1413ba25c141SLuis R. Rodriguez { 1414ba25c141SLuis R. Rodriguez struct regulatory_request *request; 1415ba25c141SLuis R. Rodriguez 141609d989d1SLuis R. Rodriguez kfree(last_request); 141709d989d1SLuis R. Rodriguez last_request = NULL; 1418ba25c141SLuis R. Rodriguez 1419ba25c141SLuis R. Rodriguez request = kzalloc(sizeof(struct regulatory_request), 1420ba25c141SLuis R. Rodriguez GFP_KERNEL); 1421ba25c141SLuis R. Rodriguez if (!request) 1422ba25c141SLuis R. Rodriguez return -ENOMEM; 1423ba25c141SLuis R. Rodriguez 1424ba25c141SLuis R. Rodriguez request->alpha2[0] = alpha2[0]; 1425ba25c141SLuis R. Rodriguez request->alpha2[1] = alpha2[1]; 14267db90f4aSLuis R. Rodriguez request->initiator = NL80211_REGDOM_SET_BY_CORE; 1427ba25c141SLuis R. Rodriguez 14285078b2e3SLuis R. Rodriguez /* 14295078b2e3SLuis R. Rodriguez * This ensures last_request is populated once modules 14305078b2e3SLuis R. Rodriguez * come swinging in and calling regulatory hints and 14315078b2e3SLuis R. Rodriguez * wiphy_apply_custom_regulatory(). 14325078b2e3SLuis R. Rodriguez */ 1433a2bff269SLuis R. Rodriguez reg_process_hint(request); 14345078b2e3SLuis R. Rodriguez 1435fe33eb39SLuis R. Rodriguez return 0; 1436ba25c141SLuis R. Rodriguez } 1437ba25c141SLuis R. Rodriguez 1438fe33eb39SLuis R. Rodriguez /* User hints */ 1439fe33eb39SLuis R. Rodriguez int regulatory_hint_user(const char *alpha2) 1440b2e1b302SLuis R. Rodriguez { 1441fe33eb39SLuis R. Rodriguez struct regulatory_request *request; 1442fe33eb39SLuis R. Rodriguez 1443be3d4810SJohannes Berg BUG_ON(!alpha2); 1444b2e1b302SLuis R. Rodriguez 1445fe33eb39SLuis R. Rodriguez request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); 1446fe33eb39SLuis R. Rodriguez if (!request) 1447fe33eb39SLuis R. Rodriguez return -ENOMEM; 1448fe33eb39SLuis R. Rodriguez 1449fe33eb39SLuis R. Rodriguez request->wiphy_idx = WIPHY_IDX_STALE; 1450fe33eb39SLuis R. Rodriguez request->alpha2[0] = alpha2[0]; 1451fe33eb39SLuis R. Rodriguez request->alpha2[1] = alpha2[1]; 1452e12822e1SLuis R. Rodriguez request->initiator = NL80211_REGDOM_SET_BY_USER; 1453fe33eb39SLuis R. Rodriguez 1454fe33eb39SLuis R. Rodriguez queue_regulatory_request(request); 1455fe33eb39SLuis R. Rodriguez 1456fe33eb39SLuis R. Rodriguez return 0; 1457fe33eb39SLuis R. Rodriguez } 1458fe33eb39SLuis R. Rodriguez 1459fe33eb39SLuis R. Rodriguez /* Driver hints */ 1460fe33eb39SLuis R. Rodriguez int regulatory_hint(struct wiphy *wiphy, const char *alpha2) 1461fe33eb39SLuis R. Rodriguez { 1462fe33eb39SLuis R. Rodriguez struct regulatory_request *request; 1463fe33eb39SLuis R. Rodriguez 1464fe33eb39SLuis R. Rodriguez BUG_ON(!alpha2); 1465fe33eb39SLuis R. Rodriguez BUG_ON(!wiphy); 1466fe33eb39SLuis R. Rodriguez 1467fe33eb39SLuis R. Rodriguez request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); 1468fe33eb39SLuis R. Rodriguez if (!request) 1469fe33eb39SLuis R. Rodriguez return -ENOMEM; 1470fe33eb39SLuis R. Rodriguez 1471fe33eb39SLuis R. Rodriguez request->wiphy_idx = get_wiphy_idx(wiphy); 1472fe33eb39SLuis R. Rodriguez 1473fe33eb39SLuis R. Rodriguez /* Must have registered wiphy first */ 1474fe33eb39SLuis R. Rodriguez BUG_ON(!wiphy_idx_valid(request->wiphy_idx)); 1475fe33eb39SLuis R. Rodriguez 1476fe33eb39SLuis R. Rodriguez request->alpha2[0] = alpha2[0]; 1477fe33eb39SLuis R. Rodriguez request->alpha2[1] = alpha2[1]; 14787db90f4aSLuis R. Rodriguez request->initiator = NL80211_REGDOM_SET_BY_DRIVER; 1479fe33eb39SLuis R. Rodriguez 1480fe33eb39SLuis R. Rodriguez queue_regulatory_request(request); 1481fe33eb39SLuis R. Rodriguez 1482fe33eb39SLuis R. Rodriguez return 0; 1483b2e1b302SLuis R. Rodriguez } 1484b2e1b302SLuis R. Rodriguez EXPORT_SYMBOL(regulatory_hint); 1485b2e1b302SLuis R. Rodriguez 14864b44c8bcSLuis R. Rodriguez /* 14874b44c8bcSLuis R. Rodriguez * We hold wdev_lock() here so we cannot hold cfg80211_mutex() and 14884b44c8bcSLuis R. Rodriguez * therefore cannot iterate over the rdev list here. 14894b44c8bcSLuis R. Rodriguez */ 14903f2355cbSLuis R. Rodriguez void regulatory_hint_11d(struct wiphy *wiphy, 149184920e3eSLuis R. Rodriguez enum ieee80211_band band, 14923f2355cbSLuis R. Rodriguez u8 *country_ie, 14933f2355cbSLuis R. Rodriguez u8 country_ie_len) 14943f2355cbSLuis R. Rodriguez { 14953f2355cbSLuis R. Rodriguez char alpha2[2]; 14963f2355cbSLuis R. Rodriguez enum environment_cap env = ENVIRON_ANY; 1497fe33eb39SLuis R. Rodriguez struct regulatory_request *request; 14983f2355cbSLuis R. Rodriguez 1499abc7381bSLuis R. Rodriguez mutex_lock(®_mutex); 15003f2355cbSLuis R. Rodriguez 15019828b017SLuis R. Rodriguez if (unlikely(!last_request)) 15029828b017SLuis R. Rodriguez goto out; 1503d335fe63SLuis R. Rodriguez 15043f2355cbSLuis R. Rodriguez /* IE len must be evenly divisible by 2 */ 15053f2355cbSLuis R. Rodriguez if (country_ie_len & 0x01) 15063f2355cbSLuis R. Rodriguez goto out; 15073f2355cbSLuis R. Rodriguez 15083f2355cbSLuis R. Rodriguez if (country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN) 15093f2355cbSLuis R. Rodriguez goto out; 15103f2355cbSLuis R. Rodriguez 15113f2355cbSLuis R. Rodriguez alpha2[0] = country_ie[0]; 15123f2355cbSLuis R. Rodriguez alpha2[1] = country_ie[1]; 15133f2355cbSLuis R. Rodriguez 15143f2355cbSLuis R. Rodriguez if (country_ie[2] == 'I') 15153f2355cbSLuis R. Rodriguez env = ENVIRON_INDOOR; 15163f2355cbSLuis R. Rodriguez else if (country_ie[2] == 'O') 15173f2355cbSLuis R. Rodriguez env = ENVIRON_OUTDOOR; 15183f2355cbSLuis R. Rodriguez 1519fb1fc7adSLuis R. Rodriguez /* 15208b19e6caSLuis R. Rodriguez * We will run this only upon a successful connection on cfg80211. 15214b44c8bcSLuis R. Rodriguez * We leave conflict resolution to the workqueue, where can hold 15224b44c8bcSLuis R. Rodriguez * cfg80211_mutex. 1523fb1fc7adSLuis R. Rodriguez */ 1524cc0b6fe8SLuis R. Rodriguez if (likely(last_request->initiator == 1525cc0b6fe8SLuis R. Rodriguez NL80211_REGDOM_SET_BY_COUNTRY_IE && 15264b44c8bcSLuis R. Rodriguez wiphy_idx_valid(last_request->wiphy_idx))) 15273f2355cbSLuis R. Rodriguez goto out; 15283f2355cbSLuis R. Rodriguez 1529fe33eb39SLuis R. Rodriguez request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); 1530fe33eb39SLuis R. Rodriguez if (!request) 1531f9f9b6e3SDan Carpenter goto out; 1532fe33eb39SLuis R. Rodriguez 1533fe33eb39SLuis R. Rodriguez request->wiphy_idx = get_wiphy_idx(wiphy); 15344f366c5dSJohn W. Linville request->alpha2[0] = alpha2[0]; 15354f366c5dSJohn W. Linville request->alpha2[1] = alpha2[1]; 15367db90f4aSLuis R. Rodriguez request->initiator = NL80211_REGDOM_SET_BY_COUNTRY_IE; 1537fe33eb39SLuis R. Rodriguez request->country_ie_env = env; 15383f2355cbSLuis R. Rodriguez 1539abc7381bSLuis R. Rodriguez mutex_unlock(®_mutex); 1540fe33eb39SLuis R. Rodriguez 1541fe33eb39SLuis R. Rodriguez queue_regulatory_request(request); 1542fe33eb39SLuis R. Rodriguez 1543fe33eb39SLuis R. Rodriguez return; 15440441d6ffSLuis R. Rodriguez 15453f2355cbSLuis R. Rodriguez out: 1546abc7381bSLuis R. Rodriguez mutex_unlock(®_mutex); 15473f2355cbSLuis R. Rodriguez } 1548b2e1b302SLuis R. Rodriguez 154909d989d1SLuis R. Rodriguez static void restore_alpha2(char *alpha2, bool reset_user) 155009d989d1SLuis R. Rodriguez { 155109d989d1SLuis R. Rodriguez /* indicates there is no alpha2 to consider for restoration */ 155209d989d1SLuis R. Rodriguez alpha2[0] = '9'; 155309d989d1SLuis R. Rodriguez alpha2[1] = '7'; 155409d989d1SLuis R. Rodriguez 155509d989d1SLuis R. Rodriguez /* The user setting has precedence over the module parameter */ 155609d989d1SLuis R. Rodriguez if (is_user_regdom_saved()) { 155709d989d1SLuis R. Rodriguez /* Unless we're asked to ignore it and reset it */ 155809d989d1SLuis R. Rodriguez if (reset_user) { 155909d989d1SLuis R. Rodriguez REG_DBG_PRINT("cfg80211: Restoring regulatory settings " 156009d989d1SLuis R. Rodriguez "including user preference\n"); 156109d989d1SLuis R. Rodriguez user_alpha2[0] = '9'; 156209d989d1SLuis R. Rodriguez user_alpha2[1] = '7'; 156309d989d1SLuis R. Rodriguez 156409d989d1SLuis R. Rodriguez /* 156509d989d1SLuis R. Rodriguez * If we're ignoring user settings, we still need to 156609d989d1SLuis R. Rodriguez * check the module parameter to ensure we put things 156709d989d1SLuis R. Rodriguez * back as they were for a full restore. 156809d989d1SLuis R. Rodriguez */ 156909d989d1SLuis R. Rodriguez if (!is_world_regdom(ieee80211_regdom)) { 157009d989d1SLuis R. Rodriguez REG_DBG_PRINT("cfg80211: Keeping preference on " 157109d989d1SLuis R. Rodriguez "module parameter ieee80211_regdom: %c%c\n", 157209d989d1SLuis R. Rodriguez ieee80211_regdom[0], 157309d989d1SLuis R. Rodriguez ieee80211_regdom[1]); 157409d989d1SLuis R. Rodriguez alpha2[0] = ieee80211_regdom[0]; 157509d989d1SLuis R. Rodriguez alpha2[1] = ieee80211_regdom[1]; 157609d989d1SLuis R. Rodriguez } 157709d989d1SLuis R. Rodriguez } else { 157809d989d1SLuis R. Rodriguez REG_DBG_PRINT("cfg80211: Restoring regulatory settings " 157909d989d1SLuis R. Rodriguez "while preserving user preference for: %c%c\n", 158009d989d1SLuis R. Rodriguez user_alpha2[0], 158109d989d1SLuis R. Rodriguez user_alpha2[1]); 158209d989d1SLuis R. Rodriguez alpha2[0] = user_alpha2[0]; 158309d989d1SLuis R. Rodriguez alpha2[1] = user_alpha2[1]; 158409d989d1SLuis R. Rodriguez } 158509d989d1SLuis R. Rodriguez } else if (!is_world_regdom(ieee80211_regdom)) { 158609d989d1SLuis R. Rodriguez REG_DBG_PRINT("cfg80211: Keeping preference on " 158709d989d1SLuis R. Rodriguez "module parameter ieee80211_regdom: %c%c\n", 158809d989d1SLuis R. Rodriguez ieee80211_regdom[0], 158909d989d1SLuis R. Rodriguez ieee80211_regdom[1]); 159009d989d1SLuis R. Rodriguez alpha2[0] = ieee80211_regdom[0]; 159109d989d1SLuis R. Rodriguez alpha2[1] = ieee80211_regdom[1]; 159209d989d1SLuis R. Rodriguez } else 159309d989d1SLuis R. Rodriguez REG_DBG_PRINT("cfg80211: Restoring regulatory settings\n"); 159409d989d1SLuis R. Rodriguez } 159509d989d1SLuis R. Rodriguez 159609d989d1SLuis R. Rodriguez /* 159709d989d1SLuis R. Rodriguez * Restoring regulatory settings involves ingoring any 159809d989d1SLuis R. Rodriguez * possibly stale country IE information and user regulatory 159909d989d1SLuis R. Rodriguez * settings if so desired, this includes any beacon hints 160009d989d1SLuis R. Rodriguez * learned as we could have traveled outside to another country 160109d989d1SLuis R. Rodriguez * after disconnection. To restore regulatory settings we do 160209d989d1SLuis R. Rodriguez * exactly what we did at bootup: 160309d989d1SLuis R. Rodriguez * 160409d989d1SLuis R. Rodriguez * - send a core regulatory hint 160509d989d1SLuis R. Rodriguez * - send a user regulatory hint if applicable 160609d989d1SLuis R. Rodriguez * 160709d989d1SLuis R. Rodriguez * Device drivers that send a regulatory hint for a specific country 160809d989d1SLuis R. Rodriguez * keep their own regulatory domain on wiphy->regd so that does does 160909d989d1SLuis R. Rodriguez * not need to be remembered. 161009d989d1SLuis R. Rodriguez */ 161109d989d1SLuis R. Rodriguez static void restore_regulatory_settings(bool reset_user) 161209d989d1SLuis R. Rodriguez { 161309d989d1SLuis R. Rodriguez char alpha2[2]; 161409d989d1SLuis R. Rodriguez struct reg_beacon *reg_beacon, *btmp; 161509d989d1SLuis R. Rodriguez 161609d989d1SLuis R. Rodriguez mutex_lock(&cfg80211_mutex); 161709d989d1SLuis R. Rodriguez mutex_lock(®_mutex); 161809d989d1SLuis R. Rodriguez 161909d989d1SLuis R. Rodriguez reset_regdomains(); 162009d989d1SLuis R. Rodriguez restore_alpha2(alpha2, reset_user); 162109d989d1SLuis R. Rodriguez 162209d989d1SLuis R. Rodriguez /* Clear beacon hints */ 162309d989d1SLuis R. Rodriguez spin_lock_bh(®_pending_beacons_lock); 162409d989d1SLuis R. Rodriguez if (!list_empty(®_pending_beacons)) { 162509d989d1SLuis R. Rodriguez list_for_each_entry_safe(reg_beacon, btmp, 162609d989d1SLuis R. Rodriguez ®_pending_beacons, list) { 162709d989d1SLuis R. Rodriguez list_del(®_beacon->list); 162809d989d1SLuis R. Rodriguez kfree(reg_beacon); 162909d989d1SLuis R. Rodriguez } 163009d989d1SLuis R. Rodriguez } 163109d989d1SLuis R. Rodriguez spin_unlock_bh(®_pending_beacons_lock); 163209d989d1SLuis R. Rodriguez 163309d989d1SLuis R. Rodriguez if (!list_empty(®_beacon_list)) { 163409d989d1SLuis R. Rodriguez list_for_each_entry_safe(reg_beacon, btmp, 163509d989d1SLuis R. Rodriguez ®_beacon_list, list) { 163609d989d1SLuis R. Rodriguez list_del(®_beacon->list); 163709d989d1SLuis R. Rodriguez kfree(reg_beacon); 163809d989d1SLuis R. Rodriguez } 163909d989d1SLuis R. Rodriguez } 164009d989d1SLuis R. Rodriguez 164109d989d1SLuis R. Rodriguez /* First restore to the basic regulatory settings */ 164209d989d1SLuis R. Rodriguez cfg80211_regdomain = cfg80211_world_regdom; 164309d989d1SLuis R. Rodriguez 164409d989d1SLuis R. Rodriguez mutex_unlock(®_mutex); 164509d989d1SLuis R. Rodriguez mutex_unlock(&cfg80211_mutex); 164609d989d1SLuis R. Rodriguez 164709d989d1SLuis R. Rodriguez regulatory_hint_core(cfg80211_regdomain->alpha2); 164809d989d1SLuis R. Rodriguez 164909d989d1SLuis R. Rodriguez /* 165009d989d1SLuis R. Rodriguez * This restores the ieee80211_regdom module parameter 165109d989d1SLuis R. Rodriguez * preference or the last user requested regulatory 165209d989d1SLuis R. Rodriguez * settings, user regulatory settings takes precedence. 165309d989d1SLuis R. Rodriguez */ 165409d989d1SLuis R. Rodriguez if (is_an_alpha2(alpha2)) 165509d989d1SLuis R. Rodriguez regulatory_hint_user(user_alpha2); 165609d989d1SLuis R. Rodriguez } 165709d989d1SLuis R. Rodriguez 165809d989d1SLuis R. Rodriguez 165909d989d1SLuis R. Rodriguez void regulatory_hint_disconnect(void) 166009d989d1SLuis R. Rodriguez { 166109d989d1SLuis R. Rodriguez REG_DBG_PRINT("cfg80211: All devices are disconnected, going to " 166209d989d1SLuis R. Rodriguez "restore regulatory settings\n"); 166309d989d1SLuis R. Rodriguez restore_regulatory_settings(false); 166409d989d1SLuis R. Rodriguez } 166509d989d1SLuis R. Rodriguez 1666e38f8a7aSLuis R. Rodriguez static bool freq_is_chan_12_13_14(u16 freq) 1667e38f8a7aSLuis R. Rodriguez { 1668e38f8a7aSLuis R. Rodriguez if (freq == ieee80211_channel_to_frequency(12) || 1669e38f8a7aSLuis R. Rodriguez freq == ieee80211_channel_to_frequency(13) || 1670e38f8a7aSLuis R. Rodriguez freq == ieee80211_channel_to_frequency(14)) 1671e38f8a7aSLuis R. Rodriguez return true; 1672e38f8a7aSLuis R. Rodriguez return false; 1673e38f8a7aSLuis R. Rodriguez } 1674e38f8a7aSLuis R. Rodriguez 1675e38f8a7aSLuis R. Rodriguez int regulatory_hint_found_beacon(struct wiphy *wiphy, 1676e38f8a7aSLuis R. Rodriguez struct ieee80211_channel *beacon_chan, 1677e38f8a7aSLuis R. Rodriguez gfp_t gfp) 1678e38f8a7aSLuis R. Rodriguez { 1679e38f8a7aSLuis R. Rodriguez struct reg_beacon *reg_beacon; 1680e38f8a7aSLuis R. Rodriguez 1681e38f8a7aSLuis R. Rodriguez if (likely((beacon_chan->beacon_found || 1682e38f8a7aSLuis R. Rodriguez (beacon_chan->flags & IEEE80211_CHAN_RADAR) || 1683e38f8a7aSLuis R. Rodriguez (beacon_chan->band == IEEE80211_BAND_2GHZ && 1684e38f8a7aSLuis R. Rodriguez !freq_is_chan_12_13_14(beacon_chan->center_freq))))) 1685e38f8a7aSLuis R. Rodriguez return 0; 1686e38f8a7aSLuis R. Rodriguez 1687e38f8a7aSLuis R. Rodriguez reg_beacon = kzalloc(sizeof(struct reg_beacon), gfp); 1688e38f8a7aSLuis R. Rodriguez if (!reg_beacon) 1689e38f8a7aSLuis R. Rodriguez return -ENOMEM; 1690e38f8a7aSLuis R. Rodriguez 16914113f751SLuis R. Rodriguez REG_DBG_PRINT("cfg80211: Found new beacon on " 1692e38f8a7aSLuis R. Rodriguez "frequency: %d MHz (Ch %d) on %s\n", 1693e38f8a7aSLuis R. Rodriguez beacon_chan->center_freq, 1694e38f8a7aSLuis R. Rodriguez ieee80211_frequency_to_channel(beacon_chan->center_freq), 1695e38f8a7aSLuis R. Rodriguez wiphy_name(wiphy)); 16964113f751SLuis R. Rodriguez 1697e38f8a7aSLuis R. Rodriguez memcpy(®_beacon->chan, beacon_chan, 1698e38f8a7aSLuis R. Rodriguez sizeof(struct ieee80211_channel)); 1699e38f8a7aSLuis R. Rodriguez 1700e38f8a7aSLuis R. Rodriguez 1701e38f8a7aSLuis R. Rodriguez /* 1702e38f8a7aSLuis R. Rodriguez * Since we can be called from BH or and non-BH context 1703e38f8a7aSLuis R. Rodriguez * we must use spin_lock_bh() 1704e38f8a7aSLuis R. Rodriguez */ 1705e38f8a7aSLuis R. Rodriguez spin_lock_bh(®_pending_beacons_lock); 1706e38f8a7aSLuis R. Rodriguez list_add_tail(®_beacon->list, ®_pending_beacons); 1707e38f8a7aSLuis R. Rodriguez spin_unlock_bh(®_pending_beacons_lock); 1708e38f8a7aSLuis R. Rodriguez 1709e38f8a7aSLuis R. Rodriguez schedule_work(®_work); 1710e38f8a7aSLuis R. Rodriguez 1711e38f8a7aSLuis R. Rodriguez return 0; 1712e38f8a7aSLuis R. Rodriguez } 1713e38f8a7aSLuis R. Rodriguez 1714a3d2eaf0SJohannes Berg static void print_rd_rules(const struct ieee80211_regdomain *rd) 1715b2e1b302SLuis R. Rodriguez { 1716b2e1b302SLuis R. Rodriguez unsigned int i; 1717a3d2eaf0SJohannes Berg const struct ieee80211_reg_rule *reg_rule = NULL; 1718a3d2eaf0SJohannes Berg const struct ieee80211_freq_range *freq_range = NULL; 1719a3d2eaf0SJohannes Berg const struct ieee80211_power_rule *power_rule = NULL; 1720b2e1b302SLuis R. Rodriguez 1721269ac5fdSKalle Valo printk(KERN_INFO " (start_freq - end_freq @ bandwidth), " 1722b2e1b302SLuis R. Rodriguez "(max_antenna_gain, max_eirp)\n"); 1723b2e1b302SLuis R. Rodriguez 1724b2e1b302SLuis R. Rodriguez for (i = 0; i < rd->n_reg_rules; i++) { 1725b2e1b302SLuis R. Rodriguez reg_rule = &rd->reg_rules[i]; 1726b2e1b302SLuis R. Rodriguez freq_range = ®_rule->freq_range; 1727b2e1b302SLuis R. Rodriguez power_rule = ®_rule->power_rule; 1728b2e1b302SLuis R. Rodriguez 1729fb1fc7adSLuis R. Rodriguez /* 1730fb1fc7adSLuis R. Rodriguez * There may not be documentation for max antenna gain 1731fb1fc7adSLuis R. Rodriguez * in certain regions 1732fb1fc7adSLuis R. Rodriguez */ 1733b2e1b302SLuis R. Rodriguez if (power_rule->max_antenna_gain) 1734269ac5fdSKalle Valo printk(KERN_INFO " (%d KHz - %d KHz @ %d KHz), " 1735b2e1b302SLuis R. Rodriguez "(%d mBi, %d mBm)\n", 1736b2e1b302SLuis R. Rodriguez freq_range->start_freq_khz, 1737b2e1b302SLuis R. Rodriguez freq_range->end_freq_khz, 1738b2e1b302SLuis R. Rodriguez freq_range->max_bandwidth_khz, 1739b2e1b302SLuis R. Rodriguez power_rule->max_antenna_gain, 1740b2e1b302SLuis R. Rodriguez power_rule->max_eirp); 1741b2e1b302SLuis R. Rodriguez else 1742269ac5fdSKalle Valo printk(KERN_INFO " (%d KHz - %d KHz @ %d KHz), " 1743b2e1b302SLuis R. Rodriguez "(N/A, %d mBm)\n", 1744b2e1b302SLuis R. Rodriguez freq_range->start_freq_khz, 1745b2e1b302SLuis R. Rodriguez freq_range->end_freq_khz, 1746b2e1b302SLuis R. Rodriguez freq_range->max_bandwidth_khz, 1747b2e1b302SLuis R. Rodriguez power_rule->max_eirp); 1748b2e1b302SLuis R. Rodriguez } 1749b2e1b302SLuis R. Rodriguez } 1750b2e1b302SLuis R. Rodriguez 1751a3d2eaf0SJohannes Berg static void print_regdomain(const struct ieee80211_regdomain *rd) 1752b2e1b302SLuis R. Rodriguez { 1753b2e1b302SLuis R. Rodriguez 17543f2355cbSLuis R. Rodriguez if (is_intersected_alpha2(rd->alpha2)) { 17553f2355cbSLuis R. Rodriguez 17567db90f4aSLuis R. Rodriguez if (last_request->initiator == 17577db90f4aSLuis R. Rodriguez NL80211_REGDOM_SET_BY_COUNTRY_IE) { 175879c97e97SJohannes Berg struct cfg80211_registered_device *rdev; 175979c97e97SJohannes Berg rdev = cfg80211_rdev_by_wiphy_idx( 1760806a9e39SLuis R. Rodriguez last_request->wiphy_idx); 176179c97e97SJohannes Berg if (rdev) { 17623f2355cbSLuis R. Rodriguez printk(KERN_INFO "cfg80211: Current regulatory " 17633f2355cbSLuis R. Rodriguez "domain updated by AP to: %c%c\n", 176479c97e97SJohannes Berg rdev->country_ie_alpha2[0], 176579c97e97SJohannes Berg rdev->country_ie_alpha2[1]); 17663f2355cbSLuis R. Rodriguez } else 17673f2355cbSLuis R. Rodriguez printk(KERN_INFO "cfg80211: Current regulatory " 17683f2355cbSLuis R. Rodriguez "domain intersected:\n"); 17693f2355cbSLuis R. Rodriguez } else 17703f2355cbSLuis R. Rodriguez printk(KERN_INFO "cfg80211: Current regulatory " 1771039498c6SLuis R. Rodriguez "domain intersected:\n"); 17723f2355cbSLuis R. Rodriguez } else if (is_world_regdom(rd->alpha2)) 1773b2e1b302SLuis R. Rodriguez printk(KERN_INFO "cfg80211: World regulatory " 1774b2e1b302SLuis R. Rodriguez "domain updated:\n"); 1775b2e1b302SLuis R. Rodriguez else { 1776b2e1b302SLuis R. Rodriguez if (is_unknown_alpha2(rd->alpha2)) 1777b2e1b302SLuis R. Rodriguez printk(KERN_INFO "cfg80211: Regulatory domain " 1778b2e1b302SLuis R. Rodriguez "changed to driver built-in settings " 1779b2e1b302SLuis R. Rodriguez "(unknown country)\n"); 1780b2e1b302SLuis R. Rodriguez else 1781b2e1b302SLuis R. Rodriguez printk(KERN_INFO "cfg80211: Regulatory domain " 1782b2e1b302SLuis R. Rodriguez "changed to country: %c%c\n", 1783b2e1b302SLuis R. Rodriguez rd->alpha2[0], rd->alpha2[1]); 1784b2e1b302SLuis R. Rodriguez } 1785b2e1b302SLuis R. Rodriguez print_rd_rules(rd); 1786b2e1b302SLuis R. Rodriguez } 1787b2e1b302SLuis R. Rodriguez 17882df78167SJohannes Berg static void print_regdomain_info(const struct ieee80211_regdomain *rd) 1789b2e1b302SLuis R. Rodriguez { 1790b2e1b302SLuis R. Rodriguez printk(KERN_INFO "cfg80211: Regulatory domain: %c%c\n", 1791b2e1b302SLuis R. Rodriguez rd->alpha2[0], rd->alpha2[1]); 1792b2e1b302SLuis R. Rodriguez print_rd_rules(rd); 1793b2e1b302SLuis R. Rodriguez } 1794b2e1b302SLuis R. Rodriguez 1795d2372b31SJohannes Berg /* Takes ownership of rd only if it doesn't fail */ 1796a3d2eaf0SJohannes Berg static int __set_regdom(const struct ieee80211_regdomain *rd) 1797b2e1b302SLuis R. Rodriguez { 17989c96477dSLuis R. Rodriguez const struct ieee80211_regdomain *intersected_rd = NULL; 179979c97e97SJohannes Berg struct cfg80211_registered_device *rdev = NULL; 1800806a9e39SLuis R. Rodriguez struct wiphy *request_wiphy; 1801b2e1b302SLuis R. Rodriguez /* Some basic sanity checks first */ 1802b2e1b302SLuis R. Rodriguez 1803b2e1b302SLuis R. Rodriguez if (is_world_regdom(rd->alpha2)) { 1804f6037d09SJohannes Berg if (WARN_ON(!reg_is_valid_request(rd->alpha2))) 1805b2e1b302SLuis R. Rodriguez return -EINVAL; 1806b2e1b302SLuis R. Rodriguez update_world_regdomain(rd); 1807b2e1b302SLuis R. Rodriguez return 0; 1808b2e1b302SLuis R. Rodriguez } 1809b2e1b302SLuis R. Rodriguez 1810b2e1b302SLuis R. Rodriguez if (!is_alpha2_set(rd->alpha2) && !is_an_alpha2(rd->alpha2) && 1811b2e1b302SLuis R. Rodriguez !is_unknown_alpha2(rd->alpha2)) 1812b2e1b302SLuis R. Rodriguez return -EINVAL; 1813b2e1b302SLuis R. Rodriguez 1814f6037d09SJohannes Berg if (!last_request) 1815b2e1b302SLuis R. Rodriguez return -EINVAL; 1816b2e1b302SLuis R. Rodriguez 1817fb1fc7adSLuis R. Rodriguez /* 1818fb1fc7adSLuis R. Rodriguez * Lets only bother proceeding on the same alpha2 if the current 18193f2355cbSLuis R. Rodriguez * rd is non static (it means CRDA was present and was used last) 1820fb1fc7adSLuis R. Rodriguez * and the pending request came in from a country IE 1821fb1fc7adSLuis R. Rodriguez */ 18227db90f4aSLuis R. Rodriguez if (last_request->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE) { 1823fb1fc7adSLuis R. Rodriguez /* 1824fb1fc7adSLuis R. Rodriguez * If someone else asked us to change the rd lets only bother 1825fb1fc7adSLuis R. Rodriguez * checking if the alpha2 changes if CRDA was already called 1826fb1fc7adSLuis R. Rodriguez */ 1827baeb66feSJohn W. Linville if (!regdom_changes(rd->alpha2)) 1828b2e1b302SLuis R. Rodriguez return -EINVAL; 18293f2355cbSLuis R. Rodriguez } 18303f2355cbSLuis R. Rodriguez 1831fb1fc7adSLuis R. Rodriguez /* 1832fb1fc7adSLuis R. Rodriguez * Now lets set the regulatory domain, update all driver channels 1833b2e1b302SLuis R. Rodriguez * and finally inform them of what we have done, in case they want 1834b2e1b302SLuis R. Rodriguez * to review or adjust their own settings based on their own 1835fb1fc7adSLuis R. Rodriguez * internal EEPROM data 1836fb1fc7adSLuis R. Rodriguez */ 1837b2e1b302SLuis R. Rodriguez 1838f6037d09SJohannes Berg if (WARN_ON(!reg_is_valid_request(rd->alpha2))) 1839b2e1b302SLuis R. Rodriguez return -EINVAL; 1840b2e1b302SLuis R. Rodriguez 1841b2e1b302SLuis R. Rodriguez if (!is_valid_rd(rd)) { 1842b2e1b302SLuis R. Rodriguez printk(KERN_ERR "cfg80211: Invalid " 1843b2e1b302SLuis R. Rodriguez "regulatory domain detected:\n"); 1844b2e1b302SLuis R. Rodriguez print_regdomain_info(rd); 1845b2e1b302SLuis R. Rodriguez return -EINVAL; 1846b2e1b302SLuis R. Rodriguez } 1847b2e1b302SLuis R. Rodriguez 1848806a9e39SLuis R. Rodriguez request_wiphy = wiphy_idx_to_wiphy(last_request->wiphy_idx); 1849806a9e39SLuis R. Rodriguez 1850b8295acdSLuis R. Rodriguez if (!last_request->intersect) { 18513e0c3ff3SLuis R. Rodriguez int r; 18523e0c3ff3SLuis R. Rodriguez 18537db90f4aSLuis R. Rodriguez if (last_request->initiator != NL80211_REGDOM_SET_BY_DRIVER) { 18543e0c3ff3SLuis R. Rodriguez reset_regdomains(); 18553e0c3ff3SLuis R. Rodriguez cfg80211_regdomain = rd; 18563e0c3ff3SLuis R. Rodriguez return 0; 18573e0c3ff3SLuis R. Rodriguez } 18583e0c3ff3SLuis R. Rodriguez 1859fb1fc7adSLuis R. Rodriguez /* 1860fb1fc7adSLuis R. Rodriguez * For a driver hint, lets copy the regulatory domain the 1861fb1fc7adSLuis R. Rodriguez * driver wanted to the wiphy to deal with conflicts 1862fb1fc7adSLuis R. Rodriguez */ 18633e0c3ff3SLuis R. Rodriguez 1864558f6d32SLuis R. Rodriguez /* 1865558f6d32SLuis R. Rodriguez * Userspace could have sent two replies with only 1866558f6d32SLuis R. Rodriguez * one kernel request. 1867558f6d32SLuis R. Rodriguez */ 1868558f6d32SLuis R. Rodriguez if (request_wiphy->regd) 1869558f6d32SLuis R. Rodriguez return -EALREADY; 18703e0c3ff3SLuis R. Rodriguez 1871806a9e39SLuis R. Rodriguez r = reg_copy_regd(&request_wiphy->regd, rd); 18723e0c3ff3SLuis R. Rodriguez if (r) 18733e0c3ff3SLuis R. Rodriguez return r; 18743e0c3ff3SLuis R. Rodriguez 1875b8295acdSLuis R. Rodriguez reset_regdomains(); 1876b8295acdSLuis R. Rodriguez cfg80211_regdomain = rd; 1877b8295acdSLuis R. Rodriguez return 0; 1878b8295acdSLuis R. Rodriguez } 1879b8295acdSLuis R. Rodriguez 1880b8295acdSLuis R. Rodriguez /* Intersection requires a bit more work */ 1881b8295acdSLuis R. Rodriguez 18827db90f4aSLuis R. Rodriguez if (last_request->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE) { 1883b8295acdSLuis R. Rodriguez 18849c96477dSLuis R. Rodriguez intersected_rd = regdom_intersect(rd, cfg80211_regdomain); 18859c96477dSLuis R. Rodriguez if (!intersected_rd) 18869c96477dSLuis R. Rodriguez return -EINVAL; 1887b8295acdSLuis R. Rodriguez 1888fb1fc7adSLuis R. Rodriguez /* 1889fb1fc7adSLuis R. Rodriguez * We can trash what CRDA provided now. 18903e0c3ff3SLuis R. Rodriguez * However if a driver requested this specific regulatory 1891fb1fc7adSLuis R. Rodriguez * domain we keep it for its private use 1892fb1fc7adSLuis R. Rodriguez */ 18937db90f4aSLuis R. Rodriguez if (last_request->initiator == NL80211_REGDOM_SET_BY_DRIVER) 1894806a9e39SLuis R. Rodriguez request_wiphy->regd = rd; 18953e0c3ff3SLuis R. Rodriguez else 18969c96477dSLuis R. Rodriguez kfree(rd); 18973e0c3ff3SLuis R. Rodriguez 1898b8295acdSLuis R. Rodriguez rd = NULL; 1899b8295acdSLuis R. Rodriguez 1900b8295acdSLuis R. Rodriguez reset_regdomains(); 1901b8295acdSLuis R. Rodriguez cfg80211_regdomain = intersected_rd; 1902b8295acdSLuis R. Rodriguez 1903b8295acdSLuis R. Rodriguez return 0; 19049c96477dSLuis R. Rodriguez } 19059c96477dSLuis R. Rodriguez 19063f2355cbSLuis R. Rodriguez if (!intersected_rd) 19073f2355cbSLuis R. Rodriguez return -EINVAL; 19083f2355cbSLuis R. Rodriguez 190979c97e97SJohannes Berg rdev = wiphy_to_dev(request_wiphy); 19103f2355cbSLuis R. Rodriguez 191179c97e97SJohannes Berg rdev->country_ie_alpha2[0] = rd->alpha2[0]; 191279c97e97SJohannes Berg rdev->country_ie_alpha2[1] = rd->alpha2[1]; 191379c97e97SJohannes Berg rdev->env = last_request->country_ie_env; 19143f2355cbSLuis R. Rodriguez 19153f2355cbSLuis R. Rodriguez BUG_ON(intersected_rd == rd); 19163f2355cbSLuis R. Rodriguez 19173f2355cbSLuis R. Rodriguez kfree(rd); 19183f2355cbSLuis R. Rodriguez rd = NULL; 19193f2355cbSLuis R. Rodriguez 1920b8295acdSLuis R. Rodriguez reset_regdomains(); 19213f2355cbSLuis R. Rodriguez cfg80211_regdomain = intersected_rd; 1922b2e1b302SLuis R. Rodriguez 1923b2e1b302SLuis R. Rodriguez return 0; 1924b2e1b302SLuis R. Rodriguez } 1925b2e1b302SLuis R. Rodriguez 1926b2e1b302SLuis R. Rodriguez 1927fb1fc7adSLuis R. Rodriguez /* 1928fb1fc7adSLuis R. Rodriguez * Use this call to set the current regulatory domain. Conflicts with 1929b2e1b302SLuis R. Rodriguez * multiple drivers can be ironed out later. Caller must've already 1930fb1fc7adSLuis R. Rodriguez * kmalloc'd the rd structure. Caller must hold cfg80211_mutex 1931fb1fc7adSLuis R. Rodriguez */ 1932a3d2eaf0SJohannes Berg int set_regdom(const struct ieee80211_regdomain *rd) 1933b2e1b302SLuis R. Rodriguez { 1934b2e1b302SLuis R. Rodriguez int r; 1935b2e1b302SLuis R. Rodriguez 1936761cf7ecSLuis R. Rodriguez assert_cfg80211_lock(); 1937761cf7ecSLuis R. Rodriguez 1938abc7381bSLuis R. Rodriguez mutex_lock(®_mutex); 1939abc7381bSLuis R. Rodriguez 1940b2e1b302SLuis R. Rodriguez /* Note that this doesn't update the wiphys, this is done below */ 1941b2e1b302SLuis R. Rodriguez r = __set_regdom(rd); 1942d2372b31SJohannes Berg if (r) { 1943d2372b31SJohannes Berg kfree(rd); 1944abc7381bSLuis R. Rodriguez mutex_unlock(®_mutex); 1945b2e1b302SLuis R. Rodriguez return r; 1946d2372b31SJohannes Berg } 1947b2e1b302SLuis R. Rodriguez 1948b2e1b302SLuis R. Rodriguez /* This would make this whole thing pointless */ 1949a01ddafdSLuis R. Rodriguez if (!last_request->intersect) 1950b2e1b302SLuis R. Rodriguez BUG_ON(rd != cfg80211_regdomain); 1951b2e1b302SLuis R. Rodriguez 1952b2e1b302SLuis R. Rodriguez /* update all wiphys now with the new established regulatory domain */ 1953f6037d09SJohannes Berg update_all_wiphy_regulatory(last_request->initiator); 1954b2e1b302SLuis R. Rodriguez 1955a01ddafdSLuis R. Rodriguez print_regdomain(cfg80211_regdomain); 1956b2e1b302SLuis R. Rodriguez 195773d54c9eSLuis R. Rodriguez nl80211_send_reg_change_event(last_request); 195873d54c9eSLuis R. Rodriguez 1959abc7381bSLuis R. Rodriguez mutex_unlock(®_mutex); 1960abc7381bSLuis R. Rodriguez 1961b2e1b302SLuis R. Rodriguez return r; 1962b2e1b302SLuis R. Rodriguez } 1963b2e1b302SLuis R. Rodriguez 1964a1794390SLuis R. Rodriguez /* Caller must hold cfg80211_mutex */ 19653f2355cbSLuis R. Rodriguez void reg_device_remove(struct wiphy *wiphy) 19663f2355cbSLuis R. Rodriguez { 19670ad8acafSLuis R. Rodriguez struct wiphy *request_wiphy = NULL; 1968806a9e39SLuis R. Rodriguez 1969761cf7ecSLuis R. Rodriguez assert_cfg80211_lock(); 1970761cf7ecSLuis R. Rodriguez 1971abc7381bSLuis R. Rodriguez mutex_lock(®_mutex); 1972abc7381bSLuis R. Rodriguez 19730ef9ccddSChris Wright kfree(wiphy->regd); 19740ef9ccddSChris Wright 19750ad8acafSLuis R. Rodriguez if (last_request) 1976806a9e39SLuis R. Rodriguez request_wiphy = wiphy_idx_to_wiphy(last_request->wiphy_idx); 1977806a9e39SLuis R. Rodriguez 19780ef9ccddSChris Wright if (!request_wiphy || request_wiphy != wiphy) 1979abc7381bSLuis R. Rodriguez goto out; 19800ef9ccddSChris Wright 1981806a9e39SLuis R. Rodriguez last_request->wiphy_idx = WIPHY_IDX_STALE; 19823f2355cbSLuis R. Rodriguez last_request->country_ie_env = ENVIRON_ANY; 1983abc7381bSLuis R. Rodriguez out: 1984abc7381bSLuis R. Rodriguez mutex_unlock(®_mutex); 19853f2355cbSLuis R. Rodriguez } 19863f2355cbSLuis R. Rodriguez 19872fcc9f73SUwe Kleine-König int __init regulatory_init(void) 1988b2e1b302SLuis R. Rodriguez { 1989bcf4f99bSLuis R. Rodriguez int err = 0; 1990734366deSJohannes Berg 1991b2e1b302SLuis R. Rodriguez reg_pdev = platform_device_register_simple("regulatory", 0, NULL, 0); 1992b2e1b302SLuis R. Rodriguez if (IS_ERR(reg_pdev)) 1993b2e1b302SLuis R. Rodriguez return PTR_ERR(reg_pdev); 1994734366deSJohannes Berg 1995fe33eb39SLuis R. Rodriguez spin_lock_init(®_requests_lock); 1996e38f8a7aSLuis R. Rodriguez spin_lock_init(®_pending_beacons_lock); 1997fe33eb39SLuis R. Rodriguez 1998a3d2eaf0SJohannes Berg cfg80211_regdomain = cfg80211_world_regdom; 1999734366deSJohannes Berg 200009d989d1SLuis R. Rodriguez user_alpha2[0] = '9'; 200109d989d1SLuis R. Rodriguez user_alpha2[1] = '7'; 200209d989d1SLuis R. Rodriguez 2003ae9e4b0dSLuis R. Rodriguez /* We always try to get an update for the static regdomain */ 2004ae9e4b0dSLuis R. Rodriguez err = regulatory_hint_core(cfg80211_regdomain->alpha2); 2005bcf4f99bSLuis R. Rodriguez if (err) { 2006bcf4f99bSLuis R. Rodriguez if (err == -ENOMEM) 2007bcf4f99bSLuis R. Rodriguez return err; 2008bcf4f99bSLuis R. Rodriguez /* 2009bcf4f99bSLuis R. Rodriguez * N.B. kobject_uevent_env() can fail mainly for when we're out 2010bcf4f99bSLuis R. Rodriguez * memory which is handled and propagated appropriately above 2011bcf4f99bSLuis R. Rodriguez * but it can also fail during a netlink_broadcast() or during 2012bcf4f99bSLuis R. Rodriguez * early boot for call_usermodehelper(). For now treat these 2013bcf4f99bSLuis R. Rodriguez * errors as non-fatal. 2014bcf4f99bSLuis R. Rodriguez */ 2015bcf4f99bSLuis R. Rodriguez printk(KERN_ERR "cfg80211: kobject_uevent_env() was unable " 2016bcf4f99bSLuis R. Rodriguez "to call CRDA during init"); 2017bcf4f99bSLuis R. Rodriguez #ifdef CONFIG_CFG80211_REG_DEBUG 2018bcf4f99bSLuis R. Rodriguez /* We want to find out exactly why when debugging */ 2019bcf4f99bSLuis R. Rodriguez WARN_ON(err); 2020bcf4f99bSLuis R. Rodriguez #endif 2021bcf4f99bSLuis R. Rodriguez } 2022734366deSJohannes Berg 2023ae9e4b0dSLuis R. Rodriguez /* 2024ae9e4b0dSLuis R. Rodriguez * Finally, if the user set the module parameter treat it 2025ae9e4b0dSLuis R. Rodriguez * as a user hint. 2026ae9e4b0dSLuis R. Rodriguez */ 2027ae9e4b0dSLuis R. Rodriguez if (!is_world_regdom(ieee80211_regdom)) 2028ae9e4b0dSLuis R. Rodriguez regulatory_hint_user(ieee80211_regdom); 2029ae9e4b0dSLuis R. Rodriguez 2030b2e1b302SLuis R. Rodriguez return 0; 2031b2e1b302SLuis R. Rodriguez } 2032b2e1b302SLuis R. Rodriguez 20332fcc9f73SUwe Kleine-König void /* __init_or_exit */ regulatory_exit(void) 2034b2e1b302SLuis R. Rodriguez { 2035fe33eb39SLuis R. Rodriguez struct regulatory_request *reg_request, *tmp; 2036e38f8a7aSLuis R. Rodriguez struct reg_beacon *reg_beacon, *btmp; 2037fe33eb39SLuis R. Rodriguez 2038fe33eb39SLuis R. Rodriguez cancel_work_sync(®_work); 2039fe33eb39SLuis R. Rodriguez 2040a1794390SLuis R. Rodriguez mutex_lock(&cfg80211_mutex); 2041abc7381bSLuis R. Rodriguez mutex_lock(®_mutex); 2042734366deSJohannes Berg 2043b2e1b302SLuis R. Rodriguez reset_regdomains(); 2044734366deSJohannes Berg 2045f6037d09SJohannes Berg kfree(last_request); 2046f6037d09SJohannes Berg 2047b2e1b302SLuis R. Rodriguez platform_device_unregister(reg_pdev); 2048734366deSJohannes Berg 2049e38f8a7aSLuis R. Rodriguez spin_lock_bh(®_pending_beacons_lock); 2050e38f8a7aSLuis R. Rodriguez if (!list_empty(®_pending_beacons)) { 2051e38f8a7aSLuis R. Rodriguez list_for_each_entry_safe(reg_beacon, btmp, 2052e38f8a7aSLuis R. Rodriguez ®_pending_beacons, list) { 2053e38f8a7aSLuis R. Rodriguez list_del(®_beacon->list); 2054e38f8a7aSLuis R. Rodriguez kfree(reg_beacon); 2055e38f8a7aSLuis R. Rodriguez } 2056e38f8a7aSLuis R. Rodriguez } 2057e38f8a7aSLuis R. Rodriguez spin_unlock_bh(®_pending_beacons_lock); 2058e38f8a7aSLuis R. Rodriguez 2059e38f8a7aSLuis R. Rodriguez if (!list_empty(®_beacon_list)) { 2060e38f8a7aSLuis R. Rodriguez list_for_each_entry_safe(reg_beacon, btmp, 2061e38f8a7aSLuis R. Rodriguez ®_beacon_list, list) { 2062e38f8a7aSLuis R. Rodriguez list_del(®_beacon->list); 2063e38f8a7aSLuis R. Rodriguez kfree(reg_beacon); 2064e38f8a7aSLuis R. Rodriguez } 2065e38f8a7aSLuis R. Rodriguez } 2066e38f8a7aSLuis R. Rodriguez 2067fe33eb39SLuis R. Rodriguez spin_lock(®_requests_lock); 2068fe33eb39SLuis R. Rodriguez if (!list_empty(®_requests_list)) { 2069fe33eb39SLuis R. Rodriguez list_for_each_entry_safe(reg_request, tmp, 2070fe33eb39SLuis R. Rodriguez ®_requests_list, list) { 2071fe33eb39SLuis R. Rodriguez list_del(®_request->list); 2072fe33eb39SLuis R. Rodriguez kfree(reg_request); 2073fe33eb39SLuis R. Rodriguez } 2074fe33eb39SLuis R. Rodriguez } 2075fe33eb39SLuis R. Rodriguez spin_unlock(®_requests_lock); 2076fe33eb39SLuis R. Rodriguez 2077abc7381bSLuis R. Rodriguez mutex_unlock(®_mutex); 2078a1794390SLuis R. Rodriguez mutex_unlock(&cfg80211_mutex); 20798318d78aSJohannes Berg } 2080