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> 39c61029c7SJohn W. Linville #include <linux/ctype.h> 40b2e1b302SLuis R. Rodriguez #include <linux/nl80211.h> 41b2e1b302SLuis R. Rodriguez #include <linux/platform_device.h> 42b2e1b302SLuis R. Rodriguez #include <net/cfg80211.h> 438318d78aSJohannes Berg #include "core.h" 44b2e1b302SLuis R. Rodriguez #include "reg.h" 453b377ea9SJohn W. Linville #include "regdb.h" 4673d54c9eSLuis R. Rodriguez #include "nl80211.h" 478318d78aSJohannes Berg 484113f751SLuis R. Rodriguez #ifdef CONFIG_CFG80211_REG_DEBUG 498271195eSJohn W. Linville #define REG_DBG_PRINT(format, args...) \ 504113f751SLuis R. Rodriguez do { \ 518271195eSJohn W. Linville printk(KERN_DEBUG format , ## args); \ 524113f751SLuis R. Rodriguez } while (0) 534113f751SLuis R. Rodriguez #else 548271195eSJohn W. Linville #define REG_DBG_PRINT(args...) 554113f751SLuis R. Rodriguez #endif 564113f751SLuis R. Rodriguez 575166ccd2SLuis R. Rodriguez /* Receipt of information from last regulatory request */ 58f6037d09SJohannes Berg static struct regulatory_request *last_request; 59734366deSJohannes Berg 60b2e1b302SLuis R. Rodriguez /* To trigger userspace events */ 61b2e1b302SLuis R. Rodriguez static struct platform_device *reg_pdev; 628318d78aSJohannes Berg 63fb1fc7adSLuis R. Rodriguez /* 64fb1fc7adSLuis R. Rodriguez * Central wireless core regulatory domains, we only need two, 65734366deSJohannes Berg * the current one and a world regulatory domain in case we have no 66fb1fc7adSLuis R. Rodriguez * information to give us an alpha2 67fb1fc7adSLuis R. Rodriguez */ 68f130347cSLuis R. Rodriguez const struct ieee80211_regdomain *cfg80211_regdomain; 69734366deSJohannes Berg 70fb1fc7adSLuis R. Rodriguez /* 71abc7381bSLuis R. Rodriguez * Protects static reg.c components: 72abc7381bSLuis R. Rodriguez * - cfg80211_world_regdom 73abc7381bSLuis R. Rodriguez * - cfg80211_regdom 74abc7381bSLuis R. Rodriguez * - last_request 75abc7381bSLuis R. Rodriguez */ 76670b7f11SJohn W. Linville static DEFINE_MUTEX(reg_mutex); 7746a5ebafSJohannes Berg 7846a5ebafSJohannes Berg static inline void assert_reg_lock(void) 7946a5ebafSJohannes Berg { 8046a5ebafSJohannes Berg lockdep_assert_held(®_mutex); 8146a5ebafSJohannes Berg } 82abc7381bSLuis R. Rodriguez 83e38f8a7aSLuis R. Rodriguez /* Used to queue up regulatory hints */ 84fe33eb39SLuis R. Rodriguez static LIST_HEAD(reg_requests_list); 85fe33eb39SLuis R. Rodriguez static spinlock_t reg_requests_lock; 86fe33eb39SLuis R. Rodriguez 87e38f8a7aSLuis R. Rodriguez /* Used to queue up beacon hints for review */ 88e38f8a7aSLuis R. Rodriguez static LIST_HEAD(reg_pending_beacons); 89e38f8a7aSLuis R. Rodriguez static spinlock_t reg_pending_beacons_lock; 90e38f8a7aSLuis R. Rodriguez 91e38f8a7aSLuis R. Rodriguez /* Used to keep track of processed beacon hints */ 92e38f8a7aSLuis R. Rodriguez static LIST_HEAD(reg_beacon_list); 93e38f8a7aSLuis R. Rodriguez 94e38f8a7aSLuis R. Rodriguez struct reg_beacon { 95e38f8a7aSLuis R. Rodriguez struct list_head list; 96e38f8a7aSLuis R. Rodriguez struct ieee80211_channel chan; 97e38f8a7aSLuis R. Rodriguez }; 98e38f8a7aSLuis R. Rodriguez 99734366deSJohannes Berg /* We keep a static world regulatory domain in case of the absence of CRDA */ 100734366deSJohannes Berg static const struct ieee80211_regdomain world_regdom = { 101611b6a82SLuis R. Rodriguez .n_reg_rules = 5, 102734366deSJohannes Berg .alpha2 = "00", 103734366deSJohannes Berg .reg_rules = { 10468798a62SLuis R. Rodriguez /* IEEE 802.11b/g, channels 1..11 */ 10568798a62SLuis R. Rodriguez REG_RULE(2412-10, 2462+10, 40, 6, 20, 0), 106611b6a82SLuis R. Rodriguez /* IEEE 802.11b/g, channels 12..13. No HT40 107611b6a82SLuis R. Rodriguez * channel fits here. */ 108611b6a82SLuis R. Rodriguez REG_RULE(2467-10, 2472+10, 20, 6, 20, 109611b6a82SLuis R. Rodriguez NL80211_RRF_PASSIVE_SCAN | 110611b6a82SLuis R. Rodriguez NL80211_RRF_NO_IBSS), 111611b6a82SLuis R. Rodriguez /* IEEE 802.11 channel 14 - Only JP enables 112611b6a82SLuis R. Rodriguez * this and for 802.11b only */ 113611b6a82SLuis R. Rodriguez REG_RULE(2484-10, 2484+10, 20, 6, 20, 114611b6a82SLuis R. Rodriguez NL80211_RRF_PASSIVE_SCAN | 115611b6a82SLuis R. Rodriguez NL80211_RRF_NO_IBSS | 116611b6a82SLuis R. Rodriguez NL80211_RRF_NO_OFDM), 1173fc71f77SLuis R. Rodriguez /* IEEE 802.11a, channel 36..48 */ 118ec329aceSLuis R. Rodriguez REG_RULE(5180-10, 5240+10, 40, 6, 20, 1193fc71f77SLuis R. Rodriguez NL80211_RRF_PASSIVE_SCAN | 1203fc71f77SLuis R. Rodriguez NL80211_RRF_NO_IBSS), 1213fc71f77SLuis R. Rodriguez 1223fc71f77SLuis R. Rodriguez /* NB: 5260 MHz - 5700 MHz requies DFS */ 1233fc71f77SLuis R. Rodriguez 1243fc71f77SLuis R. Rodriguez /* IEEE 802.11a, channel 149..165 */ 125ec329aceSLuis R. Rodriguez REG_RULE(5745-10, 5825+10, 40, 6, 20, 1263fc71f77SLuis R. Rodriguez NL80211_RRF_PASSIVE_SCAN | 1273fc71f77SLuis R. Rodriguez NL80211_RRF_NO_IBSS), 128734366deSJohannes Berg } 129734366deSJohannes Berg }; 130734366deSJohannes Berg 131a3d2eaf0SJohannes Berg static const struct ieee80211_regdomain *cfg80211_world_regdom = 132a3d2eaf0SJohannes Berg &world_regdom; 133734366deSJohannes Berg 1346ee7d330SLuis R. Rodriguez static char *ieee80211_regdom = "00"; 13509d989d1SLuis R. Rodriguez static char user_alpha2[2]; 1366ee7d330SLuis R. Rodriguez 137734366deSJohannes Berg module_param(ieee80211_regdom, charp, 0444); 138734366deSJohannes Berg MODULE_PARM_DESC(ieee80211_regdom, "IEEE 802.11 regulatory domain code"); 139734366deSJohannes Berg 140734366deSJohannes Berg static void reset_regdomains(void) 141734366deSJohannes Berg { 142942b25cfSJohannes Berg /* avoid freeing static information or freeing something twice */ 143942b25cfSJohannes Berg if (cfg80211_regdomain == cfg80211_world_regdom) 144942b25cfSJohannes Berg cfg80211_regdomain = NULL; 145942b25cfSJohannes Berg if (cfg80211_world_regdom == &world_regdom) 146942b25cfSJohannes Berg cfg80211_world_regdom = NULL; 147942b25cfSJohannes Berg if (cfg80211_regdomain == &world_regdom) 148942b25cfSJohannes Berg cfg80211_regdomain = NULL; 149942b25cfSJohannes Berg 150734366deSJohannes Berg kfree(cfg80211_regdomain); 151734366deSJohannes Berg kfree(cfg80211_world_regdom); 152734366deSJohannes Berg 153a3d2eaf0SJohannes Berg cfg80211_world_regdom = &world_regdom; 154734366deSJohannes Berg cfg80211_regdomain = NULL; 155734366deSJohannes Berg } 156734366deSJohannes Berg 157fb1fc7adSLuis R. Rodriguez /* 158fb1fc7adSLuis R. Rodriguez * Dynamic world regulatory domain requested by the wireless 159fb1fc7adSLuis R. Rodriguez * core upon initialization 160fb1fc7adSLuis R. Rodriguez */ 161a3d2eaf0SJohannes Berg static void update_world_regdomain(const struct ieee80211_regdomain *rd) 162734366deSJohannes Berg { 163f6037d09SJohannes Berg BUG_ON(!last_request); 164734366deSJohannes Berg 165734366deSJohannes Berg reset_regdomains(); 166734366deSJohannes Berg 167734366deSJohannes Berg cfg80211_world_regdom = rd; 168734366deSJohannes Berg cfg80211_regdomain = rd; 169734366deSJohannes Berg } 170734366deSJohannes Berg 171a3d2eaf0SJohannes Berg bool is_world_regdom(const char *alpha2) 172b2e1b302SLuis R. Rodriguez { 173b2e1b302SLuis R. Rodriguez if (!alpha2) 174b2e1b302SLuis R. Rodriguez return false; 175b2e1b302SLuis R. Rodriguez if (alpha2[0] == '0' && alpha2[1] == '0') 176b2e1b302SLuis R. Rodriguez return true; 177b2e1b302SLuis R. Rodriguez return false; 178b2e1b302SLuis R. Rodriguez } 179b2e1b302SLuis R. Rodriguez 180a3d2eaf0SJohannes Berg static bool is_alpha2_set(const char *alpha2) 181b2e1b302SLuis R. Rodriguez { 182b2e1b302SLuis R. Rodriguez if (!alpha2) 183b2e1b302SLuis R. Rodriguez return false; 184b2e1b302SLuis R. Rodriguez if (alpha2[0] != 0 && alpha2[1] != 0) 185b2e1b302SLuis R. Rodriguez return true; 186b2e1b302SLuis R. Rodriguez return false; 187b2e1b302SLuis R. Rodriguez } 188b2e1b302SLuis R. Rodriguez 189a3d2eaf0SJohannes Berg static bool is_unknown_alpha2(const char *alpha2) 190b2e1b302SLuis R. Rodriguez { 191b2e1b302SLuis R. Rodriguez if (!alpha2) 192b2e1b302SLuis R. Rodriguez return false; 193fb1fc7adSLuis R. Rodriguez /* 194fb1fc7adSLuis R. Rodriguez * Special case where regulatory domain was built by driver 195fb1fc7adSLuis R. Rodriguez * but a specific alpha2 cannot be determined 196fb1fc7adSLuis R. Rodriguez */ 197b2e1b302SLuis R. Rodriguez if (alpha2[0] == '9' && alpha2[1] == '9') 198b2e1b302SLuis R. Rodriguez return true; 199b2e1b302SLuis R. Rodriguez return false; 200b2e1b302SLuis R. Rodriguez } 201b2e1b302SLuis R. Rodriguez 2023f2355cbSLuis R. Rodriguez static bool is_intersected_alpha2(const char *alpha2) 2033f2355cbSLuis R. Rodriguez { 2043f2355cbSLuis R. Rodriguez if (!alpha2) 2053f2355cbSLuis R. Rodriguez return false; 206fb1fc7adSLuis R. Rodriguez /* 207fb1fc7adSLuis R. Rodriguez * Special case where regulatory domain is the 2083f2355cbSLuis R. Rodriguez * result of an intersection between two regulatory domain 209fb1fc7adSLuis R. Rodriguez * structures 210fb1fc7adSLuis R. Rodriguez */ 2113f2355cbSLuis R. Rodriguez if (alpha2[0] == '9' && alpha2[1] == '8') 2123f2355cbSLuis R. Rodriguez return true; 2133f2355cbSLuis R. Rodriguez return false; 2143f2355cbSLuis R. Rodriguez } 2153f2355cbSLuis R. Rodriguez 216a3d2eaf0SJohannes Berg static bool is_an_alpha2(const char *alpha2) 217b2e1b302SLuis R. Rodriguez { 218b2e1b302SLuis R. Rodriguez if (!alpha2) 219b2e1b302SLuis R. Rodriguez return false; 220c61029c7SJohn W. Linville if (isalpha(alpha2[0]) && isalpha(alpha2[1])) 221b2e1b302SLuis R. Rodriguez return true; 222b2e1b302SLuis R. Rodriguez return false; 223b2e1b302SLuis R. Rodriguez } 224b2e1b302SLuis R. Rodriguez 225a3d2eaf0SJohannes Berg static bool alpha2_equal(const char *alpha2_x, const char *alpha2_y) 226b2e1b302SLuis R. Rodriguez { 227b2e1b302SLuis R. Rodriguez if (!alpha2_x || !alpha2_y) 228b2e1b302SLuis R. Rodriguez return false; 229b2e1b302SLuis R. Rodriguez if (alpha2_x[0] == alpha2_y[0] && 230b2e1b302SLuis R. Rodriguez alpha2_x[1] == alpha2_y[1]) 231b2e1b302SLuis R. Rodriguez return true; 232b2e1b302SLuis R. Rodriguez return false; 233b2e1b302SLuis R. Rodriguez } 234b2e1b302SLuis R. Rodriguez 23569b1572bSLuis R. Rodriguez static bool regdom_changes(const char *alpha2) 236b2e1b302SLuis R. Rodriguez { 237761cf7ecSLuis R. Rodriguez assert_cfg80211_lock(); 238761cf7ecSLuis R. Rodriguez 239b2e1b302SLuis R. Rodriguez if (!cfg80211_regdomain) 240b2e1b302SLuis R. Rodriguez return true; 241b2e1b302SLuis R. Rodriguez if (alpha2_equal(cfg80211_regdomain->alpha2, alpha2)) 242b2e1b302SLuis R. Rodriguez return false; 243b2e1b302SLuis R. Rodriguez return true; 244b2e1b302SLuis R. Rodriguez } 245b2e1b302SLuis R. Rodriguez 24609d989d1SLuis R. Rodriguez /* 24709d989d1SLuis R. Rodriguez * The NL80211_REGDOM_SET_BY_USER regdom alpha2 is cached, this lets 24809d989d1SLuis R. Rodriguez * you know if a valid regulatory hint with NL80211_REGDOM_SET_BY_USER 24909d989d1SLuis R. Rodriguez * has ever been issued. 25009d989d1SLuis R. Rodriguez */ 25109d989d1SLuis R. Rodriguez static bool is_user_regdom_saved(void) 25209d989d1SLuis R. Rodriguez { 25309d989d1SLuis R. Rodriguez if (user_alpha2[0] == '9' && user_alpha2[1] == '7') 25409d989d1SLuis R. Rodriguez return false; 25509d989d1SLuis R. Rodriguez 25609d989d1SLuis R. Rodriguez /* This would indicate a mistake on the design */ 25709d989d1SLuis R. Rodriguez if (WARN((!is_world_regdom(user_alpha2) && 25809d989d1SLuis R. Rodriguez !is_an_alpha2(user_alpha2)), 25909d989d1SLuis R. Rodriguez "Unexpected user alpha2: %c%c\n", 26009d989d1SLuis R. Rodriguez user_alpha2[0], 26109d989d1SLuis R. Rodriguez user_alpha2[1])) 26209d989d1SLuis R. Rodriguez return false; 26309d989d1SLuis R. Rodriguez 26409d989d1SLuis R. Rodriguez return true; 26509d989d1SLuis R. Rodriguez } 26609d989d1SLuis R. Rodriguez 2673b377ea9SJohn W. Linville static int reg_copy_regd(const struct ieee80211_regdomain **dst_regd, 2683b377ea9SJohn W. Linville const struct ieee80211_regdomain *src_regd) 2693b377ea9SJohn W. Linville { 2703b377ea9SJohn W. Linville struct ieee80211_regdomain *regd; 2713b377ea9SJohn W. Linville int size_of_regd = 0; 2723b377ea9SJohn W. Linville unsigned int i; 2733b377ea9SJohn W. Linville 2743b377ea9SJohn W. Linville size_of_regd = sizeof(struct ieee80211_regdomain) + 2753b377ea9SJohn W. Linville ((src_regd->n_reg_rules + 1) * sizeof(struct ieee80211_reg_rule)); 2763b377ea9SJohn W. Linville 2773b377ea9SJohn W. Linville regd = kzalloc(size_of_regd, GFP_KERNEL); 2783b377ea9SJohn W. Linville if (!regd) 2793b377ea9SJohn W. Linville return -ENOMEM; 2803b377ea9SJohn W. Linville 2813b377ea9SJohn W. Linville memcpy(regd, src_regd, sizeof(struct ieee80211_regdomain)); 2823b377ea9SJohn W. Linville 2833b377ea9SJohn W. Linville for (i = 0; i < src_regd->n_reg_rules; i++) 2843b377ea9SJohn W. Linville memcpy(®d->reg_rules[i], &src_regd->reg_rules[i], 2853b377ea9SJohn W. Linville sizeof(struct ieee80211_reg_rule)); 2863b377ea9SJohn W. Linville 2873b377ea9SJohn W. Linville *dst_regd = regd; 2883b377ea9SJohn W. Linville return 0; 2893b377ea9SJohn W. Linville } 2903b377ea9SJohn W. Linville 2913b377ea9SJohn W. Linville #ifdef CONFIG_CFG80211_INTERNAL_REGDB 2923b377ea9SJohn W. Linville struct reg_regdb_search_request { 2933b377ea9SJohn W. Linville char alpha2[2]; 2943b377ea9SJohn W. Linville struct list_head list; 2953b377ea9SJohn W. Linville }; 2963b377ea9SJohn W. Linville 2973b377ea9SJohn W. Linville static LIST_HEAD(reg_regdb_search_list); 298368d06f5SJohn W. Linville static DEFINE_MUTEX(reg_regdb_search_mutex); 2993b377ea9SJohn W. Linville 3003b377ea9SJohn W. Linville static void reg_regdb_search(struct work_struct *work) 3013b377ea9SJohn W. Linville { 3023b377ea9SJohn W. Linville struct reg_regdb_search_request *request; 3033b377ea9SJohn W. Linville const struct ieee80211_regdomain *curdom, *regdom; 3043b377ea9SJohn W. Linville int i, r; 3053b377ea9SJohn W. Linville 306368d06f5SJohn W. Linville mutex_lock(®_regdb_search_mutex); 3073b377ea9SJohn W. Linville while (!list_empty(®_regdb_search_list)) { 3083b377ea9SJohn W. Linville request = list_first_entry(®_regdb_search_list, 3093b377ea9SJohn W. Linville struct reg_regdb_search_request, 3103b377ea9SJohn W. Linville list); 3113b377ea9SJohn W. Linville list_del(&request->list); 3123b377ea9SJohn W. Linville 3133b377ea9SJohn W. Linville for (i=0; i<reg_regdb_size; i++) { 3143b377ea9SJohn W. Linville curdom = reg_regdb[i]; 3153b377ea9SJohn W. Linville 3163b377ea9SJohn W. Linville if (!memcmp(request->alpha2, curdom->alpha2, 2)) { 3173b377ea9SJohn W. Linville r = reg_copy_regd(®dom, curdom); 3183b377ea9SJohn W. Linville if (r) 3193b377ea9SJohn W. Linville break; 3203b377ea9SJohn W. Linville mutex_lock(&cfg80211_mutex); 3213b377ea9SJohn W. Linville set_regdom(regdom); 3223b377ea9SJohn W. Linville mutex_unlock(&cfg80211_mutex); 3233b377ea9SJohn W. Linville break; 3243b377ea9SJohn W. Linville } 3253b377ea9SJohn W. Linville } 3263b377ea9SJohn W. Linville 3273b377ea9SJohn W. Linville kfree(request); 3283b377ea9SJohn W. Linville } 329368d06f5SJohn W. Linville mutex_unlock(®_regdb_search_mutex); 3303b377ea9SJohn W. Linville } 3313b377ea9SJohn W. Linville 3323b377ea9SJohn W. Linville static DECLARE_WORK(reg_regdb_work, reg_regdb_search); 3333b377ea9SJohn W. Linville 3343b377ea9SJohn W. Linville static void reg_regdb_query(const char *alpha2) 3353b377ea9SJohn W. Linville { 3363b377ea9SJohn W. Linville struct reg_regdb_search_request *request; 3373b377ea9SJohn W. Linville 3383b377ea9SJohn W. Linville if (!alpha2) 3393b377ea9SJohn W. Linville return; 3403b377ea9SJohn W. Linville 3413b377ea9SJohn W. Linville request = kzalloc(sizeof(struct reg_regdb_search_request), GFP_KERNEL); 3423b377ea9SJohn W. Linville if (!request) 3433b377ea9SJohn W. Linville return; 3443b377ea9SJohn W. Linville 3453b377ea9SJohn W. Linville memcpy(request->alpha2, alpha2, 2); 3463b377ea9SJohn W. Linville 347368d06f5SJohn W. Linville mutex_lock(®_regdb_search_mutex); 3483b377ea9SJohn W. Linville list_add_tail(&request->list, ®_regdb_search_list); 349368d06f5SJohn W. Linville mutex_unlock(®_regdb_search_mutex); 3503b377ea9SJohn W. Linville 3513b377ea9SJohn W. Linville schedule_work(®_regdb_work); 3523b377ea9SJohn W. Linville } 3533b377ea9SJohn W. Linville #else 3543b377ea9SJohn W. Linville static inline void reg_regdb_query(const char *alpha2) {} 3553b377ea9SJohn W. Linville #endif /* CONFIG_CFG80211_INTERNAL_REGDB */ 3563b377ea9SJohn W. Linville 357fb1fc7adSLuis R. Rodriguez /* 358fb1fc7adSLuis R. Rodriguez * This lets us keep regulatory code which is updated on a regulatory 359fb1fc7adSLuis R. Rodriguez * basis in userspace. 360fb1fc7adSLuis R. Rodriguez */ 361b2e1b302SLuis R. Rodriguez static int call_crda(const char *alpha2) 362b2e1b302SLuis R. Rodriguez { 363b2e1b302SLuis R. Rodriguez char country_env[9 + 2] = "COUNTRY="; 364b2e1b302SLuis R. Rodriguez char *envp[] = { 365b2e1b302SLuis R. Rodriguez country_env, 366b2e1b302SLuis R. Rodriguez NULL 3678318d78aSJohannes Berg }; 3688318d78aSJohannes Berg 369b2e1b302SLuis R. Rodriguez if (!is_world_regdom((char *) alpha2)) 370b2e1b302SLuis R. Rodriguez printk(KERN_INFO "cfg80211: Calling CRDA for country: %c%c\n", 371b2e1b302SLuis R. Rodriguez alpha2[0], alpha2[1]); 372b2e1b302SLuis R. Rodriguez else 373b2e1b302SLuis R. Rodriguez printk(KERN_INFO "cfg80211: Calling CRDA to update world " 374b2e1b302SLuis R. Rodriguez "regulatory domain\n"); 3758318d78aSJohannes Berg 3763b377ea9SJohn W. Linville /* query internal regulatory database (if it exists) */ 3773b377ea9SJohn W. Linville reg_regdb_query(alpha2); 3783b377ea9SJohn W. Linville 379b2e1b302SLuis R. Rodriguez country_env[8] = alpha2[0]; 380b2e1b302SLuis R. Rodriguez country_env[9] = alpha2[1]; 3818318d78aSJohannes Berg 382b2e1b302SLuis R. Rodriguez return kobject_uevent_env(®_pdev->dev.kobj, KOBJ_CHANGE, envp); 383b2e1b302SLuis R. Rodriguez } 384b2e1b302SLuis R. Rodriguez 385b2e1b302SLuis R. Rodriguez /* Used by nl80211 before kmalloc'ing our regulatory domain */ 386a3d2eaf0SJohannes Berg bool reg_is_valid_request(const char *alpha2) 387b2e1b302SLuis R. Rodriguez { 38861405e97SLuis R. Rodriguez assert_cfg80211_lock(); 38961405e97SLuis R. Rodriguez 390f6037d09SJohannes Berg if (!last_request) 391f6037d09SJohannes Berg return false; 392f6037d09SJohannes Berg 393f6037d09SJohannes Berg return alpha2_equal(last_request->alpha2, alpha2); 394b2e1b302SLuis R. Rodriguez } 395b2e1b302SLuis R. Rodriguez 396b2e1b302SLuis R. Rodriguez /* Sanity check on a regulatory rule */ 397a3d2eaf0SJohannes Berg static bool is_valid_reg_rule(const struct ieee80211_reg_rule *rule) 398b2e1b302SLuis R. Rodriguez { 399a3d2eaf0SJohannes Berg const struct ieee80211_freq_range *freq_range = &rule->freq_range; 400b2e1b302SLuis R. Rodriguez u32 freq_diff; 401b2e1b302SLuis R. Rodriguez 40291e99004SLuis R. Rodriguez if (freq_range->start_freq_khz <= 0 || freq_range->end_freq_khz <= 0) 403b2e1b302SLuis R. Rodriguez return false; 404b2e1b302SLuis R. Rodriguez 405b2e1b302SLuis R. Rodriguez if (freq_range->start_freq_khz > freq_range->end_freq_khz) 406b2e1b302SLuis R. Rodriguez return false; 407b2e1b302SLuis R. Rodriguez 408b2e1b302SLuis R. Rodriguez freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz; 409b2e1b302SLuis R. Rodriguez 410bd05f28eSRoel Kluin if (freq_range->end_freq_khz <= freq_range->start_freq_khz || 411bd05f28eSRoel Kluin freq_range->max_bandwidth_khz > freq_diff) 412b2e1b302SLuis R. Rodriguez return false; 413b2e1b302SLuis R. Rodriguez 414b2e1b302SLuis R. Rodriguez return true; 415b2e1b302SLuis R. Rodriguez } 416b2e1b302SLuis R. Rodriguez 417a3d2eaf0SJohannes Berg static bool is_valid_rd(const struct ieee80211_regdomain *rd) 418b2e1b302SLuis R. Rodriguez { 419a3d2eaf0SJohannes Berg const struct ieee80211_reg_rule *reg_rule = NULL; 420b2e1b302SLuis R. Rodriguez unsigned int i; 421b2e1b302SLuis R. Rodriguez 422b2e1b302SLuis R. Rodriguez if (!rd->n_reg_rules) 423b2e1b302SLuis R. Rodriguez return false; 424b2e1b302SLuis R. Rodriguez 42588dc1c3fSLuis R. Rodriguez if (WARN_ON(rd->n_reg_rules > NL80211_MAX_SUPP_REG_RULES)) 42688dc1c3fSLuis R. Rodriguez return false; 42788dc1c3fSLuis R. Rodriguez 428b2e1b302SLuis R. Rodriguez for (i = 0; i < rd->n_reg_rules; i++) { 429b2e1b302SLuis R. Rodriguez reg_rule = &rd->reg_rules[i]; 430b2e1b302SLuis R. Rodriguez if (!is_valid_reg_rule(reg_rule)) 431b2e1b302SLuis R. Rodriguez return false; 432b2e1b302SLuis R. Rodriguez } 433b2e1b302SLuis R. Rodriguez 434b2e1b302SLuis R. Rodriguez return true; 435b2e1b302SLuis R. Rodriguez } 436b2e1b302SLuis R. Rodriguez 437038659e7SLuis R. Rodriguez static bool reg_does_bw_fit(const struct ieee80211_freq_range *freq_range, 438038659e7SLuis R. Rodriguez u32 center_freq_khz, 439038659e7SLuis R. Rodriguez u32 bw_khz) 440b2e1b302SLuis R. Rodriguez { 441038659e7SLuis R. Rodriguez u32 start_freq_khz, end_freq_khz; 442038659e7SLuis R. Rodriguez 443038659e7SLuis R. Rodriguez start_freq_khz = center_freq_khz - (bw_khz/2); 444038659e7SLuis R. Rodriguez end_freq_khz = center_freq_khz + (bw_khz/2); 445038659e7SLuis R. Rodriguez 446b2e1b302SLuis R. Rodriguez if (start_freq_khz >= freq_range->start_freq_khz && 447b2e1b302SLuis R. Rodriguez end_freq_khz <= freq_range->end_freq_khz) 448038659e7SLuis R. Rodriguez return true; 449038659e7SLuis R. Rodriguez 450038659e7SLuis R. Rodriguez return false; 451b2e1b302SLuis R. Rodriguez } 452b2e1b302SLuis R. Rodriguez 4530c7dc45dSLuis R. Rodriguez /** 4540c7dc45dSLuis R. Rodriguez * freq_in_rule_band - tells us if a frequency is in a frequency band 4550c7dc45dSLuis R. Rodriguez * @freq_range: frequency rule we want to query 4560c7dc45dSLuis R. Rodriguez * @freq_khz: frequency we are inquiring about 4570c7dc45dSLuis R. Rodriguez * 4580c7dc45dSLuis R. Rodriguez * This lets us know if a specific frequency rule is or is not relevant to 4590c7dc45dSLuis R. Rodriguez * a specific frequency's band. Bands are device specific and artificial 4600c7dc45dSLuis R. Rodriguez * definitions (the "2.4 GHz band" and the "5 GHz band"), however it is 4610c7dc45dSLuis R. Rodriguez * safe for now to assume that a frequency rule should not be part of a 4620c7dc45dSLuis R. Rodriguez * frequency's band if the start freq or end freq are off by more than 2 GHz. 4630c7dc45dSLuis R. Rodriguez * This resolution can be lowered and should be considered as we add 4640c7dc45dSLuis R. Rodriguez * regulatory rule support for other "bands". 4650c7dc45dSLuis R. Rodriguez **/ 4660c7dc45dSLuis R. Rodriguez static bool freq_in_rule_band(const struct ieee80211_freq_range *freq_range, 4670c7dc45dSLuis R. Rodriguez u32 freq_khz) 4680c7dc45dSLuis R. Rodriguez { 4690c7dc45dSLuis R. Rodriguez #define ONE_GHZ_IN_KHZ 1000000 4700c7dc45dSLuis R. Rodriguez if (abs(freq_khz - freq_range->start_freq_khz) <= (2 * ONE_GHZ_IN_KHZ)) 4710c7dc45dSLuis R. Rodriguez return true; 4720c7dc45dSLuis R. Rodriguez if (abs(freq_khz - freq_range->end_freq_khz) <= (2 * ONE_GHZ_IN_KHZ)) 4730c7dc45dSLuis R. Rodriguez return true; 4740c7dc45dSLuis R. Rodriguez return false; 4750c7dc45dSLuis R. Rodriguez #undef ONE_GHZ_IN_KHZ 4760c7dc45dSLuis R. Rodriguez } 4770c7dc45dSLuis R. Rodriguez 478fb1fc7adSLuis R. Rodriguez /* 479fb1fc7adSLuis R. Rodriguez * Helper for regdom_intersect(), this does the real 480fb1fc7adSLuis R. Rodriguez * mathematical intersection fun 481fb1fc7adSLuis R. Rodriguez */ 4829c96477dSLuis R. Rodriguez static int reg_rules_intersect( 4839c96477dSLuis R. Rodriguez const struct ieee80211_reg_rule *rule1, 4849c96477dSLuis R. Rodriguez const struct ieee80211_reg_rule *rule2, 4859c96477dSLuis R. Rodriguez struct ieee80211_reg_rule *intersected_rule) 4869c96477dSLuis R. Rodriguez { 4879c96477dSLuis R. Rodriguez const struct ieee80211_freq_range *freq_range1, *freq_range2; 4889c96477dSLuis R. Rodriguez struct ieee80211_freq_range *freq_range; 4899c96477dSLuis R. Rodriguez const struct ieee80211_power_rule *power_rule1, *power_rule2; 4909c96477dSLuis R. Rodriguez struct ieee80211_power_rule *power_rule; 4919c96477dSLuis R. Rodriguez u32 freq_diff; 4929c96477dSLuis R. Rodriguez 4939c96477dSLuis R. Rodriguez freq_range1 = &rule1->freq_range; 4949c96477dSLuis R. Rodriguez freq_range2 = &rule2->freq_range; 4959c96477dSLuis R. Rodriguez freq_range = &intersected_rule->freq_range; 4969c96477dSLuis R. Rodriguez 4979c96477dSLuis R. Rodriguez power_rule1 = &rule1->power_rule; 4989c96477dSLuis R. Rodriguez power_rule2 = &rule2->power_rule; 4999c96477dSLuis R. Rodriguez power_rule = &intersected_rule->power_rule; 5009c96477dSLuis R. Rodriguez 5019c96477dSLuis R. Rodriguez freq_range->start_freq_khz = max(freq_range1->start_freq_khz, 5029c96477dSLuis R. Rodriguez freq_range2->start_freq_khz); 5039c96477dSLuis R. Rodriguez freq_range->end_freq_khz = min(freq_range1->end_freq_khz, 5049c96477dSLuis R. Rodriguez freq_range2->end_freq_khz); 5059c96477dSLuis R. Rodriguez freq_range->max_bandwidth_khz = min(freq_range1->max_bandwidth_khz, 5069c96477dSLuis R. Rodriguez freq_range2->max_bandwidth_khz); 5079c96477dSLuis R. Rodriguez 5089c96477dSLuis R. Rodriguez freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz; 5099c96477dSLuis R. Rodriguez if (freq_range->max_bandwidth_khz > freq_diff) 5109c96477dSLuis R. Rodriguez freq_range->max_bandwidth_khz = freq_diff; 5119c96477dSLuis R. Rodriguez 5129c96477dSLuis R. Rodriguez power_rule->max_eirp = min(power_rule1->max_eirp, 5139c96477dSLuis R. Rodriguez power_rule2->max_eirp); 5149c96477dSLuis R. Rodriguez power_rule->max_antenna_gain = min(power_rule1->max_antenna_gain, 5159c96477dSLuis R. Rodriguez power_rule2->max_antenna_gain); 5169c96477dSLuis R. Rodriguez 5179c96477dSLuis R. Rodriguez intersected_rule->flags = (rule1->flags | rule2->flags); 5189c96477dSLuis R. Rodriguez 5199c96477dSLuis R. Rodriguez if (!is_valid_reg_rule(intersected_rule)) 5209c96477dSLuis R. Rodriguez return -EINVAL; 5219c96477dSLuis R. Rodriguez 5229c96477dSLuis R. Rodriguez return 0; 5239c96477dSLuis R. Rodriguez } 5249c96477dSLuis R. Rodriguez 5259c96477dSLuis R. Rodriguez /** 5269c96477dSLuis R. Rodriguez * regdom_intersect - do the intersection between two regulatory domains 5279c96477dSLuis R. Rodriguez * @rd1: first regulatory domain 5289c96477dSLuis R. Rodriguez * @rd2: second regulatory domain 5299c96477dSLuis R. Rodriguez * 5309c96477dSLuis R. Rodriguez * Use this function to get the intersection between two regulatory domains. 5319c96477dSLuis R. Rodriguez * Once completed we will mark the alpha2 for the rd as intersected, "98", 5329c96477dSLuis R. Rodriguez * as no one single alpha2 can represent this regulatory domain. 5339c96477dSLuis R. Rodriguez * 5349c96477dSLuis R. Rodriguez * Returns a pointer to the regulatory domain structure which will hold the 5359c96477dSLuis R. Rodriguez * resulting intersection of rules between rd1 and rd2. We will 5369c96477dSLuis R. Rodriguez * kzalloc() this structure for you. 5379c96477dSLuis R. Rodriguez */ 5389c96477dSLuis R. Rodriguez static struct ieee80211_regdomain *regdom_intersect( 5399c96477dSLuis R. Rodriguez const struct ieee80211_regdomain *rd1, 5409c96477dSLuis R. Rodriguez const struct ieee80211_regdomain *rd2) 5419c96477dSLuis R. Rodriguez { 5429c96477dSLuis R. Rodriguez int r, size_of_regd; 5439c96477dSLuis R. Rodriguez unsigned int x, y; 5449c96477dSLuis R. Rodriguez unsigned int num_rules = 0, rule_idx = 0; 5459c96477dSLuis R. Rodriguez const struct ieee80211_reg_rule *rule1, *rule2; 5469c96477dSLuis R. Rodriguez struct ieee80211_reg_rule *intersected_rule; 5479c96477dSLuis R. Rodriguez struct ieee80211_regdomain *rd; 5489c96477dSLuis R. Rodriguez /* This is just a dummy holder to help us count */ 5499c96477dSLuis R. Rodriguez struct ieee80211_reg_rule irule; 5509c96477dSLuis R. Rodriguez 5519c96477dSLuis R. Rodriguez /* Uses the stack temporarily for counter arithmetic */ 5529c96477dSLuis R. Rodriguez intersected_rule = &irule; 5539c96477dSLuis R. Rodriguez 5549c96477dSLuis R. Rodriguez memset(intersected_rule, 0, sizeof(struct ieee80211_reg_rule)); 5559c96477dSLuis R. Rodriguez 5569c96477dSLuis R. Rodriguez if (!rd1 || !rd2) 5579c96477dSLuis R. Rodriguez return NULL; 5589c96477dSLuis R. Rodriguez 559fb1fc7adSLuis R. Rodriguez /* 560fb1fc7adSLuis R. Rodriguez * First we get a count of the rules we'll need, then we actually 5619c96477dSLuis R. Rodriguez * build them. This is to so we can malloc() and free() a 5629c96477dSLuis R. Rodriguez * regdomain once. The reason we use reg_rules_intersect() here 5639c96477dSLuis R. Rodriguez * is it will return -EINVAL if the rule computed makes no sense. 564fb1fc7adSLuis R. Rodriguez * All rules that do check out OK are valid. 565fb1fc7adSLuis R. Rodriguez */ 5669c96477dSLuis R. Rodriguez 5679c96477dSLuis R. Rodriguez for (x = 0; x < rd1->n_reg_rules; x++) { 5689c96477dSLuis R. Rodriguez rule1 = &rd1->reg_rules[x]; 5699c96477dSLuis R. Rodriguez for (y = 0; y < rd2->n_reg_rules; y++) { 5709c96477dSLuis R. Rodriguez rule2 = &rd2->reg_rules[y]; 5719c96477dSLuis R. Rodriguez if (!reg_rules_intersect(rule1, rule2, 5729c96477dSLuis R. Rodriguez intersected_rule)) 5739c96477dSLuis R. Rodriguez num_rules++; 5749c96477dSLuis R. Rodriguez memset(intersected_rule, 0, 5759c96477dSLuis R. Rodriguez sizeof(struct ieee80211_reg_rule)); 5769c96477dSLuis R. Rodriguez } 5779c96477dSLuis R. Rodriguez } 5789c96477dSLuis R. Rodriguez 5799c96477dSLuis R. Rodriguez if (!num_rules) 5809c96477dSLuis R. Rodriguez return NULL; 5819c96477dSLuis R. Rodriguez 5829c96477dSLuis R. Rodriguez size_of_regd = sizeof(struct ieee80211_regdomain) + 5839c96477dSLuis R. Rodriguez ((num_rules + 1) * sizeof(struct ieee80211_reg_rule)); 5849c96477dSLuis R. Rodriguez 5859c96477dSLuis R. Rodriguez rd = kzalloc(size_of_regd, GFP_KERNEL); 5869c96477dSLuis R. Rodriguez if (!rd) 5879c96477dSLuis R. Rodriguez return NULL; 5889c96477dSLuis R. Rodriguez 5899c96477dSLuis R. Rodriguez for (x = 0; x < rd1->n_reg_rules; x++) { 5909c96477dSLuis R. Rodriguez rule1 = &rd1->reg_rules[x]; 5919c96477dSLuis R. Rodriguez for (y = 0; y < rd2->n_reg_rules; y++) { 5929c96477dSLuis R. Rodriguez rule2 = &rd2->reg_rules[y]; 593fb1fc7adSLuis R. Rodriguez /* 594fb1fc7adSLuis R. Rodriguez * This time around instead of using the stack lets 5959c96477dSLuis R. Rodriguez * write to the target rule directly saving ourselves 596fb1fc7adSLuis R. Rodriguez * a memcpy() 597fb1fc7adSLuis R. Rodriguez */ 5989c96477dSLuis R. Rodriguez intersected_rule = &rd->reg_rules[rule_idx]; 5999c96477dSLuis R. Rodriguez r = reg_rules_intersect(rule1, rule2, 6009c96477dSLuis R. Rodriguez intersected_rule); 601fb1fc7adSLuis R. Rodriguez /* 602fb1fc7adSLuis R. Rodriguez * No need to memset here the intersected rule here as 603fb1fc7adSLuis R. Rodriguez * we're not using the stack anymore 604fb1fc7adSLuis R. Rodriguez */ 6059c96477dSLuis R. Rodriguez if (r) 6069c96477dSLuis R. Rodriguez continue; 6079c96477dSLuis R. Rodriguez rule_idx++; 6089c96477dSLuis R. Rodriguez } 6099c96477dSLuis R. Rodriguez } 6109c96477dSLuis R. Rodriguez 6119c96477dSLuis R. Rodriguez if (rule_idx != num_rules) { 6129c96477dSLuis R. Rodriguez kfree(rd); 6139c96477dSLuis R. Rodriguez return NULL; 6149c96477dSLuis R. Rodriguez } 6159c96477dSLuis R. Rodriguez 6169c96477dSLuis R. Rodriguez rd->n_reg_rules = num_rules; 6179c96477dSLuis R. Rodriguez rd->alpha2[0] = '9'; 6189c96477dSLuis R. Rodriguez rd->alpha2[1] = '8'; 6199c96477dSLuis R. Rodriguez 6209c96477dSLuis R. Rodriguez return rd; 6219c96477dSLuis R. Rodriguez } 6229c96477dSLuis R. Rodriguez 623fb1fc7adSLuis R. Rodriguez /* 624fb1fc7adSLuis R. Rodriguez * XXX: add support for the rest of enum nl80211_reg_rule_flags, we may 625fb1fc7adSLuis R. Rodriguez * want to just have the channel structure use these 626fb1fc7adSLuis R. Rodriguez */ 627b2e1b302SLuis R. Rodriguez static u32 map_regdom_flags(u32 rd_flags) 628b2e1b302SLuis R. Rodriguez { 629b2e1b302SLuis R. Rodriguez u32 channel_flags = 0; 630b2e1b302SLuis R. Rodriguez if (rd_flags & NL80211_RRF_PASSIVE_SCAN) 631b2e1b302SLuis R. Rodriguez channel_flags |= IEEE80211_CHAN_PASSIVE_SCAN; 632b2e1b302SLuis R. Rodriguez if (rd_flags & NL80211_RRF_NO_IBSS) 633b2e1b302SLuis R. Rodriguez channel_flags |= IEEE80211_CHAN_NO_IBSS; 634b2e1b302SLuis R. Rodriguez if (rd_flags & NL80211_RRF_DFS) 635b2e1b302SLuis R. Rodriguez channel_flags |= IEEE80211_CHAN_RADAR; 636b2e1b302SLuis R. Rodriguez return channel_flags; 637b2e1b302SLuis R. Rodriguez } 638b2e1b302SLuis R. Rodriguez 6391fa25e41SLuis R. Rodriguez static int freq_reg_info_regd(struct wiphy *wiphy, 6401fa25e41SLuis R. Rodriguez u32 center_freq, 641038659e7SLuis R. Rodriguez u32 desired_bw_khz, 6421fa25e41SLuis R. Rodriguez const struct ieee80211_reg_rule **reg_rule, 6431fa25e41SLuis R. Rodriguez const struct ieee80211_regdomain *custom_regd) 6448318d78aSJohannes Berg { 6458318d78aSJohannes Berg int i; 6460c7dc45dSLuis R. Rodriguez bool band_rule_found = false; 6473e0c3ff3SLuis R. Rodriguez const struct ieee80211_regdomain *regd; 648038659e7SLuis R. Rodriguez bool bw_fits = false; 649038659e7SLuis R. Rodriguez 650038659e7SLuis R. Rodriguez if (!desired_bw_khz) 651038659e7SLuis R. Rodriguez desired_bw_khz = MHZ_TO_KHZ(20); 6528318d78aSJohannes Berg 6531fa25e41SLuis R. Rodriguez regd = custom_regd ? custom_regd : cfg80211_regdomain; 6543e0c3ff3SLuis R. Rodriguez 655fb1fc7adSLuis R. Rodriguez /* 656fb1fc7adSLuis R. Rodriguez * Follow the driver's regulatory domain, if present, unless a country 657fb1fc7adSLuis R. Rodriguez * IE has been processed or a user wants to help complaince further 658fb1fc7adSLuis R. Rodriguez */ 6597db90f4aSLuis R. Rodriguez if (last_request->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && 6607db90f4aSLuis R. Rodriguez last_request->initiator != NL80211_REGDOM_SET_BY_USER && 6613e0c3ff3SLuis R. Rodriguez wiphy->regd) 6623e0c3ff3SLuis R. Rodriguez regd = wiphy->regd; 6633e0c3ff3SLuis R. Rodriguez 6643e0c3ff3SLuis R. Rodriguez if (!regd) 665b2e1b302SLuis R. Rodriguez return -EINVAL; 666b2e1b302SLuis R. Rodriguez 6673e0c3ff3SLuis R. Rodriguez for (i = 0; i < regd->n_reg_rules; i++) { 668b2e1b302SLuis R. Rodriguez const struct ieee80211_reg_rule *rr; 669b2e1b302SLuis R. Rodriguez const struct ieee80211_freq_range *fr = NULL; 670b2e1b302SLuis R. Rodriguez const struct ieee80211_power_rule *pr = NULL; 671b2e1b302SLuis R. Rodriguez 6723e0c3ff3SLuis R. Rodriguez rr = ®d->reg_rules[i]; 673b2e1b302SLuis R. Rodriguez fr = &rr->freq_range; 674b2e1b302SLuis R. Rodriguez pr = &rr->power_rule; 6750c7dc45dSLuis R. Rodriguez 676fb1fc7adSLuis R. Rodriguez /* 677fb1fc7adSLuis R. Rodriguez * We only need to know if one frequency rule was 6780c7dc45dSLuis R. Rodriguez * was in center_freq's band, that's enough, so lets 679fb1fc7adSLuis R. Rodriguez * not overwrite it once found 680fb1fc7adSLuis R. Rodriguez */ 6810c7dc45dSLuis R. Rodriguez if (!band_rule_found) 6820c7dc45dSLuis R. Rodriguez band_rule_found = freq_in_rule_band(fr, center_freq); 6830c7dc45dSLuis R. Rodriguez 684038659e7SLuis R. Rodriguez bw_fits = reg_does_bw_fit(fr, 685038659e7SLuis R. Rodriguez center_freq, 686038659e7SLuis R. Rodriguez desired_bw_khz); 6870c7dc45dSLuis R. Rodriguez 688038659e7SLuis R. Rodriguez if (band_rule_found && bw_fits) { 689b2e1b302SLuis R. Rodriguez *reg_rule = rr; 690038659e7SLuis R. Rodriguez return 0; 6918318d78aSJohannes Berg } 6928318d78aSJohannes Berg } 6938318d78aSJohannes Berg 6940c7dc45dSLuis R. Rodriguez if (!band_rule_found) 6950c7dc45dSLuis R. Rodriguez return -ERANGE; 6960c7dc45dSLuis R. Rodriguez 697038659e7SLuis R. Rodriguez return -EINVAL; 698b2e1b302SLuis R. Rodriguez } 699b2e1b302SLuis R. Rodriguez 700038659e7SLuis R. Rodriguez int freq_reg_info(struct wiphy *wiphy, 701038659e7SLuis R. Rodriguez u32 center_freq, 702038659e7SLuis R. Rodriguez u32 desired_bw_khz, 7031fa25e41SLuis R. Rodriguez const struct ieee80211_reg_rule **reg_rule) 7041fa25e41SLuis R. Rodriguez { 705ac46d48eSLuis R. Rodriguez assert_cfg80211_lock(); 706038659e7SLuis R. Rodriguez return freq_reg_info_regd(wiphy, 707038659e7SLuis R. Rodriguez center_freq, 708038659e7SLuis R. Rodriguez desired_bw_khz, 709038659e7SLuis R. Rodriguez reg_rule, 710038659e7SLuis R. Rodriguez NULL); 7111fa25e41SLuis R. Rodriguez } 7124f366c5dSJohn W. Linville EXPORT_SYMBOL(freq_reg_info); 713b2e1b302SLuis R. Rodriguez 714038659e7SLuis R. Rodriguez /* 715038659e7SLuis R. Rodriguez * Note that right now we assume the desired channel bandwidth 716038659e7SLuis R. Rodriguez * is always 20 MHz for each individual channel (HT40 uses 20 MHz 717038659e7SLuis R. Rodriguez * per channel, the primary and the extension channel). To support 718038659e7SLuis R. Rodriguez * smaller custom bandwidths such as 5 MHz or 10 MHz we'll need a 719038659e7SLuis R. Rodriguez * new ieee80211_channel.target_bw and re run the regulatory check 720038659e7SLuis R. Rodriguez * on the wiphy with the target_bw specified. Then we can simply use 721038659e7SLuis R. Rodriguez * that below for the desired_bw_khz below. 722038659e7SLuis R. Rodriguez */ 723a92a3ce7SLuis R. Rodriguez static void handle_channel(struct wiphy *wiphy, enum ieee80211_band band, 724a92a3ce7SLuis R. Rodriguez unsigned int chan_idx) 725b2e1b302SLuis R. Rodriguez { 726b2e1b302SLuis R. Rodriguez int r; 727038659e7SLuis R. Rodriguez u32 flags, bw_flags = 0; 728038659e7SLuis R. Rodriguez u32 desired_bw_khz = MHZ_TO_KHZ(20); 729b2e1b302SLuis R. Rodriguez const struct ieee80211_reg_rule *reg_rule = NULL; 730b2e1b302SLuis R. Rodriguez const struct ieee80211_power_rule *power_rule = NULL; 731038659e7SLuis R. Rodriguez const struct ieee80211_freq_range *freq_range = NULL; 732a92a3ce7SLuis R. Rodriguez struct ieee80211_supported_band *sband; 733a92a3ce7SLuis R. Rodriguez struct ieee80211_channel *chan; 734fe33eb39SLuis R. Rodriguez struct wiphy *request_wiphy = NULL; 735a92a3ce7SLuis R. Rodriguez 736761cf7ecSLuis R. Rodriguez assert_cfg80211_lock(); 737761cf7ecSLuis R. Rodriguez 738806a9e39SLuis R. Rodriguez request_wiphy = wiphy_idx_to_wiphy(last_request->wiphy_idx); 739806a9e39SLuis R. Rodriguez 740a92a3ce7SLuis R. Rodriguez sband = wiphy->bands[band]; 741a92a3ce7SLuis R. Rodriguez BUG_ON(chan_idx >= sband->n_channels); 742a92a3ce7SLuis R. Rodriguez chan = &sband->channels[chan_idx]; 743a92a3ce7SLuis R. Rodriguez 744a92a3ce7SLuis R. Rodriguez flags = chan->orig_flags; 745b2e1b302SLuis R. Rodriguez 746038659e7SLuis R. Rodriguez r = freq_reg_info(wiphy, 747038659e7SLuis R. Rodriguez MHZ_TO_KHZ(chan->center_freq), 748038659e7SLuis R. Rodriguez desired_bw_khz, 749038659e7SLuis R. Rodriguez ®_rule); 750b2e1b302SLuis R. Rodriguez 7514f366c5dSJohn W. Linville if (r) 7528318d78aSJohannes Berg return; 7538318d78aSJohannes Berg 754b2e1b302SLuis R. Rodriguez power_rule = ®_rule->power_rule; 755038659e7SLuis R. Rodriguez freq_range = ®_rule->freq_range; 756038659e7SLuis R. Rodriguez 757038659e7SLuis R. Rodriguez if (freq_range->max_bandwidth_khz < MHZ_TO_KHZ(40)) 758038659e7SLuis R. Rodriguez bw_flags = IEEE80211_CHAN_NO_HT40; 759b2e1b302SLuis R. Rodriguez 7607db90f4aSLuis R. Rodriguez if (last_request->initiator == NL80211_REGDOM_SET_BY_DRIVER && 761806a9e39SLuis R. Rodriguez request_wiphy && request_wiphy == wiphy && 7625be83de5SJohannes Berg request_wiphy->flags & WIPHY_FLAG_STRICT_REGULATORY) { 763fb1fc7adSLuis R. Rodriguez /* 764fb1fc7adSLuis R. Rodriguez * This gaurantees the driver's requested regulatory domain 765f976376dSLuis R. Rodriguez * will always be used as a base for further regulatory 766fb1fc7adSLuis R. Rodriguez * settings 767fb1fc7adSLuis R. Rodriguez */ 768f976376dSLuis R. Rodriguez chan->flags = chan->orig_flags = 769038659e7SLuis R. Rodriguez map_regdom_flags(reg_rule->flags) | bw_flags; 770f976376dSLuis R. Rodriguez chan->max_antenna_gain = chan->orig_mag = 771f976376dSLuis R. Rodriguez (int) MBI_TO_DBI(power_rule->max_antenna_gain); 772f976376dSLuis R. Rodriguez chan->max_power = chan->orig_mpwr = 773f976376dSLuis R. Rodriguez (int) MBM_TO_DBM(power_rule->max_eirp); 774f976376dSLuis R. Rodriguez return; 775f976376dSLuis R. Rodriguez } 776f976376dSLuis R. Rodriguez 777038659e7SLuis R. Rodriguez chan->flags = flags | bw_flags | map_regdom_flags(reg_rule->flags); 7788318d78aSJohannes Berg chan->max_antenna_gain = min(chan->orig_mag, 779b2e1b302SLuis R. Rodriguez (int) MBI_TO_DBI(power_rule->max_antenna_gain)); 780253898c4SJohn W. Linville if (chan->orig_mpwr) 781b2e1b302SLuis R. Rodriguez chan->max_power = min(chan->orig_mpwr, 782b2e1b302SLuis R. Rodriguez (int) MBM_TO_DBM(power_rule->max_eirp)); 783253898c4SJohn W. Linville else 784b2e1b302SLuis R. Rodriguez chan->max_power = (int) MBM_TO_DBM(power_rule->max_eirp); 7858318d78aSJohannes Berg } 7868318d78aSJohannes Berg 787a92a3ce7SLuis R. Rodriguez static void handle_band(struct wiphy *wiphy, enum ieee80211_band band) 7888318d78aSJohannes Berg { 789a92a3ce7SLuis R. Rodriguez unsigned int i; 790a92a3ce7SLuis R. Rodriguez struct ieee80211_supported_band *sband; 791a92a3ce7SLuis R. Rodriguez 792a92a3ce7SLuis R. Rodriguez BUG_ON(!wiphy->bands[band]); 793a92a3ce7SLuis R. Rodriguez sband = wiphy->bands[band]; 7948318d78aSJohannes Berg 7958318d78aSJohannes Berg for (i = 0; i < sband->n_channels; i++) 796a92a3ce7SLuis R. Rodriguez handle_channel(wiphy, band, i); 7978318d78aSJohannes Berg } 7988318d78aSJohannes Berg 7997db90f4aSLuis R. Rodriguez static bool ignore_reg_update(struct wiphy *wiphy, 8007db90f4aSLuis R. Rodriguez enum nl80211_reg_initiator initiator) 80114b9815aSLuis R. Rodriguez { 80214b9815aSLuis R. Rodriguez if (!last_request) 80314b9815aSLuis R. Rodriguez return true; 8047db90f4aSLuis R. Rodriguez if (initiator == NL80211_REGDOM_SET_BY_CORE && 8055be83de5SJohannes Berg wiphy->flags & WIPHY_FLAG_CUSTOM_REGULATORY) 80614b9815aSLuis R. Rodriguez return true; 807fb1fc7adSLuis R. Rodriguez /* 808fb1fc7adSLuis R. Rodriguez * wiphy->regd will be set once the device has its own 809fb1fc7adSLuis R. Rodriguez * desired regulatory domain set 810fb1fc7adSLuis R. Rodriguez */ 8115be83de5SJohannes Berg if (wiphy->flags & WIPHY_FLAG_STRICT_REGULATORY && !wiphy->regd && 812f976376dSLuis R. Rodriguez !is_world_regdom(last_request->alpha2)) 81314b9815aSLuis R. Rodriguez return true; 81414b9815aSLuis R. Rodriguez return false; 81514b9815aSLuis R. Rodriguez } 81614b9815aSLuis R. Rodriguez 8177db90f4aSLuis R. Rodriguez static void update_all_wiphy_regulatory(enum nl80211_reg_initiator initiator) 818b2e1b302SLuis R. Rodriguez { 81979c97e97SJohannes Berg struct cfg80211_registered_device *rdev; 820b2e1b302SLuis R. Rodriguez 82179c97e97SJohannes Berg list_for_each_entry(rdev, &cfg80211_rdev_list, list) 82279c97e97SJohannes Berg wiphy_update_regulatory(&rdev->wiphy, initiator); 823b2e1b302SLuis R. Rodriguez } 824b2e1b302SLuis R. Rodriguez 825e38f8a7aSLuis R. Rodriguez static void handle_reg_beacon(struct wiphy *wiphy, 826e38f8a7aSLuis R. Rodriguez unsigned int chan_idx, 827e38f8a7aSLuis R. Rodriguez struct reg_beacon *reg_beacon) 828e38f8a7aSLuis R. Rodriguez { 829e38f8a7aSLuis R. Rodriguez struct ieee80211_supported_band *sband; 830e38f8a7aSLuis R. Rodriguez struct ieee80211_channel *chan; 8316bad8766SLuis R. Rodriguez bool channel_changed = false; 8326bad8766SLuis R. Rodriguez struct ieee80211_channel chan_before; 833e38f8a7aSLuis R. Rodriguez 834e38f8a7aSLuis R. Rodriguez assert_cfg80211_lock(); 835e38f8a7aSLuis R. Rodriguez 836e38f8a7aSLuis R. Rodriguez sband = wiphy->bands[reg_beacon->chan.band]; 837e38f8a7aSLuis R. Rodriguez chan = &sband->channels[chan_idx]; 838e38f8a7aSLuis R. Rodriguez 839e38f8a7aSLuis R. Rodriguez if (likely(chan->center_freq != reg_beacon->chan.center_freq)) 840e38f8a7aSLuis R. Rodriguez return; 841e38f8a7aSLuis R. Rodriguez 8426bad8766SLuis R. Rodriguez if (chan->beacon_found) 8436bad8766SLuis R. Rodriguez return; 8446bad8766SLuis R. Rodriguez 8456bad8766SLuis R. Rodriguez chan->beacon_found = true; 8466bad8766SLuis R. Rodriguez 8475be83de5SJohannes Berg if (wiphy->flags & WIPHY_FLAG_DISABLE_BEACON_HINTS) 84837184244SLuis R. Rodriguez return; 84937184244SLuis R. Rodriguez 8506bad8766SLuis R. Rodriguez chan_before.center_freq = chan->center_freq; 8516bad8766SLuis R. Rodriguez chan_before.flags = chan->flags; 8526bad8766SLuis R. Rodriguez 85337184244SLuis R. Rodriguez if (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN) { 854e38f8a7aSLuis R. Rodriguez chan->flags &= ~IEEE80211_CHAN_PASSIVE_SCAN; 8556bad8766SLuis R. Rodriguez channel_changed = true; 856e38f8a7aSLuis R. Rodriguez } 857e38f8a7aSLuis R. Rodriguez 85837184244SLuis R. Rodriguez if (chan->flags & IEEE80211_CHAN_NO_IBSS) { 859e38f8a7aSLuis R. Rodriguez chan->flags &= ~IEEE80211_CHAN_NO_IBSS; 8606bad8766SLuis R. Rodriguez channel_changed = true; 861e38f8a7aSLuis R. Rodriguez } 862e38f8a7aSLuis R. Rodriguez 8636bad8766SLuis R. Rodriguez if (channel_changed) 8646bad8766SLuis R. Rodriguez nl80211_send_beacon_hint_event(wiphy, &chan_before, chan); 865e38f8a7aSLuis R. Rodriguez } 866e38f8a7aSLuis R. Rodriguez 867e38f8a7aSLuis R. Rodriguez /* 868e38f8a7aSLuis R. Rodriguez * Called when a scan on a wiphy finds a beacon on 869e38f8a7aSLuis R. Rodriguez * new channel 870e38f8a7aSLuis R. Rodriguez */ 871e38f8a7aSLuis R. Rodriguez static void wiphy_update_new_beacon(struct wiphy *wiphy, 872e38f8a7aSLuis R. Rodriguez struct reg_beacon *reg_beacon) 873e38f8a7aSLuis R. Rodriguez { 874e38f8a7aSLuis R. Rodriguez unsigned int i; 875e38f8a7aSLuis R. Rodriguez struct ieee80211_supported_band *sband; 876e38f8a7aSLuis R. Rodriguez 877e38f8a7aSLuis R. Rodriguez assert_cfg80211_lock(); 878e38f8a7aSLuis R. Rodriguez 879e38f8a7aSLuis R. Rodriguez if (!wiphy->bands[reg_beacon->chan.band]) 880e38f8a7aSLuis R. Rodriguez return; 881e38f8a7aSLuis R. Rodriguez 882e38f8a7aSLuis R. Rodriguez sband = wiphy->bands[reg_beacon->chan.band]; 883e38f8a7aSLuis R. Rodriguez 884e38f8a7aSLuis R. Rodriguez for (i = 0; i < sband->n_channels; i++) 885e38f8a7aSLuis R. Rodriguez handle_reg_beacon(wiphy, i, reg_beacon); 886e38f8a7aSLuis R. Rodriguez } 887e38f8a7aSLuis R. Rodriguez 888e38f8a7aSLuis R. Rodriguez /* 889e38f8a7aSLuis R. Rodriguez * Called upon reg changes or a new wiphy is added 890e38f8a7aSLuis R. Rodriguez */ 891e38f8a7aSLuis R. Rodriguez static void wiphy_update_beacon_reg(struct wiphy *wiphy) 892e38f8a7aSLuis R. Rodriguez { 893e38f8a7aSLuis R. Rodriguez unsigned int i; 894e38f8a7aSLuis R. Rodriguez struct ieee80211_supported_band *sband; 895e38f8a7aSLuis R. Rodriguez struct reg_beacon *reg_beacon; 896e38f8a7aSLuis R. Rodriguez 897e38f8a7aSLuis R. Rodriguez assert_cfg80211_lock(); 898e38f8a7aSLuis R. Rodriguez 899e38f8a7aSLuis R. Rodriguez if (list_empty(®_beacon_list)) 900e38f8a7aSLuis R. Rodriguez return; 901e38f8a7aSLuis R. Rodriguez 902e38f8a7aSLuis R. Rodriguez list_for_each_entry(reg_beacon, ®_beacon_list, list) { 903e38f8a7aSLuis R. Rodriguez if (!wiphy->bands[reg_beacon->chan.band]) 904e38f8a7aSLuis R. Rodriguez continue; 905e38f8a7aSLuis R. Rodriguez sband = wiphy->bands[reg_beacon->chan.band]; 906e38f8a7aSLuis R. Rodriguez for (i = 0; i < sband->n_channels; i++) 907e38f8a7aSLuis R. Rodriguez handle_reg_beacon(wiphy, i, reg_beacon); 908e38f8a7aSLuis R. Rodriguez } 909e38f8a7aSLuis R. Rodriguez } 910e38f8a7aSLuis R. Rodriguez 911e38f8a7aSLuis R. Rodriguez static bool reg_is_world_roaming(struct wiphy *wiphy) 912e38f8a7aSLuis R. Rodriguez { 913e38f8a7aSLuis R. Rodriguez if (is_world_regdom(cfg80211_regdomain->alpha2) || 914e38f8a7aSLuis R. Rodriguez (wiphy->regd && is_world_regdom(wiphy->regd->alpha2))) 915e38f8a7aSLuis R. Rodriguez return true; 916b1ed8dddSLuis R. Rodriguez if (last_request && 917b1ed8dddSLuis R. Rodriguez last_request->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && 9185be83de5SJohannes Berg wiphy->flags & WIPHY_FLAG_CUSTOM_REGULATORY) 919e38f8a7aSLuis R. Rodriguez return true; 920e38f8a7aSLuis R. Rodriguez return false; 921e38f8a7aSLuis R. Rodriguez } 922e38f8a7aSLuis R. Rodriguez 923e38f8a7aSLuis R. Rodriguez /* Reap the advantages of previously found beacons */ 924e38f8a7aSLuis R. Rodriguez static void reg_process_beacons(struct wiphy *wiphy) 925e38f8a7aSLuis R. Rodriguez { 926b1ed8dddSLuis R. Rodriguez /* 927b1ed8dddSLuis R. Rodriguez * Means we are just firing up cfg80211, so no beacons would 928b1ed8dddSLuis R. Rodriguez * have been processed yet. 929b1ed8dddSLuis R. Rodriguez */ 930b1ed8dddSLuis R. Rodriguez if (!last_request) 931b1ed8dddSLuis R. Rodriguez return; 932e38f8a7aSLuis R. Rodriguez if (!reg_is_world_roaming(wiphy)) 933e38f8a7aSLuis R. Rodriguez return; 934e38f8a7aSLuis R. Rodriguez wiphy_update_beacon_reg(wiphy); 935e38f8a7aSLuis R. Rodriguez } 936e38f8a7aSLuis R. Rodriguez 937038659e7SLuis R. Rodriguez static bool is_ht40_not_allowed(struct ieee80211_channel *chan) 938038659e7SLuis R. Rodriguez { 939038659e7SLuis R. Rodriguez if (!chan) 940038659e7SLuis R. Rodriguez return true; 941038659e7SLuis R. Rodriguez if (chan->flags & IEEE80211_CHAN_DISABLED) 942038659e7SLuis R. Rodriguez return true; 943038659e7SLuis R. Rodriguez /* This would happen when regulatory rules disallow HT40 completely */ 944038659e7SLuis R. Rodriguez if (IEEE80211_CHAN_NO_HT40 == (chan->flags & (IEEE80211_CHAN_NO_HT40))) 945038659e7SLuis R. Rodriguez return true; 946038659e7SLuis R. Rodriguez return false; 947038659e7SLuis R. Rodriguez } 948038659e7SLuis R. Rodriguez 949038659e7SLuis R. Rodriguez static void reg_process_ht_flags_channel(struct wiphy *wiphy, 950038659e7SLuis R. Rodriguez enum ieee80211_band band, 951038659e7SLuis R. Rodriguez unsigned int chan_idx) 952038659e7SLuis R. Rodriguez { 953038659e7SLuis R. Rodriguez struct ieee80211_supported_band *sband; 954038659e7SLuis R. Rodriguez struct ieee80211_channel *channel; 955038659e7SLuis R. Rodriguez struct ieee80211_channel *channel_before = NULL, *channel_after = NULL; 956038659e7SLuis R. Rodriguez unsigned int i; 957038659e7SLuis R. Rodriguez 958038659e7SLuis R. Rodriguez assert_cfg80211_lock(); 959038659e7SLuis R. Rodriguez 960038659e7SLuis R. Rodriguez sband = wiphy->bands[band]; 961038659e7SLuis R. Rodriguez BUG_ON(chan_idx >= sband->n_channels); 962038659e7SLuis R. Rodriguez channel = &sband->channels[chan_idx]; 963038659e7SLuis R. Rodriguez 964038659e7SLuis R. Rodriguez if (is_ht40_not_allowed(channel)) { 965038659e7SLuis R. Rodriguez channel->flags |= IEEE80211_CHAN_NO_HT40; 966038659e7SLuis R. Rodriguez return; 967038659e7SLuis R. Rodriguez } 968038659e7SLuis R. Rodriguez 969038659e7SLuis R. Rodriguez /* 970038659e7SLuis R. Rodriguez * We need to ensure the extension channels exist to 971038659e7SLuis R. Rodriguez * be able to use HT40- or HT40+, this finds them (or not) 972038659e7SLuis R. Rodriguez */ 973038659e7SLuis R. Rodriguez for (i = 0; i < sband->n_channels; i++) { 974038659e7SLuis R. Rodriguez struct ieee80211_channel *c = &sband->channels[i]; 975038659e7SLuis R. Rodriguez if (c->center_freq == (channel->center_freq - 20)) 976038659e7SLuis R. Rodriguez channel_before = c; 977038659e7SLuis R. Rodriguez if (c->center_freq == (channel->center_freq + 20)) 978038659e7SLuis R. Rodriguez channel_after = c; 979038659e7SLuis R. Rodriguez } 980038659e7SLuis R. Rodriguez 981038659e7SLuis R. Rodriguez /* 982038659e7SLuis R. Rodriguez * Please note that this assumes target bandwidth is 20 MHz, 983038659e7SLuis R. Rodriguez * if that ever changes we also need to change the below logic 984038659e7SLuis R. Rodriguez * to include that as well. 985038659e7SLuis R. Rodriguez */ 986038659e7SLuis R. Rodriguez if (is_ht40_not_allowed(channel_before)) 987689da1b3SLuis R. Rodriguez channel->flags |= IEEE80211_CHAN_NO_HT40MINUS; 988038659e7SLuis R. Rodriguez else 989689da1b3SLuis R. Rodriguez channel->flags &= ~IEEE80211_CHAN_NO_HT40MINUS; 990038659e7SLuis R. Rodriguez 991038659e7SLuis R. Rodriguez if (is_ht40_not_allowed(channel_after)) 992689da1b3SLuis R. Rodriguez channel->flags |= IEEE80211_CHAN_NO_HT40PLUS; 993038659e7SLuis R. Rodriguez else 994689da1b3SLuis R. Rodriguez channel->flags &= ~IEEE80211_CHAN_NO_HT40PLUS; 995038659e7SLuis R. Rodriguez } 996038659e7SLuis R. Rodriguez 997038659e7SLuis R. Rodriguez static void reg_process_ht_flags_band(struct wiphy *wiphy, 998038659e7SLuis R. Rodriguez enum ieee80211_band band) 999038659e7SLuis R. Rodriguez { 1000038659e7SLuis R. Rodriguez unsigned int i; 1001038659e7SLuis R. Rodriguez struct ieee80211_supported_band *sband; 1002038659e7SLuis R. Rodriguez 1003038659e7SLuis R. Rodriguez BUG_ON(!wiphy->bands[band]); 1004038659e7SLuis R. Rodriguez sband = wiphy->bands[band]; 1005038659e7SLuis R. Rodriguez 1006038659e7SLuis R. Rodriguez for (i = 0; i < sband->n_channels; i++) 1007038659e7SLuis R. Rodriguez reg_process_ht_flags_channel(wiphy, band, i); 1008038659e7SLuis R. Rodriguez } 1009038659e7SLuis R. Rodriguez 1010038659e7SLuis R. Rodriguez static void reg_process_ht_flags(struct wiphy *wiphy) 1011038659e7SLuis R. Rodriguez { 1012038659e7SLuis R. Rodriguez enum ieee80211_band band; 1013038659e7SLuis R. Rodriguez 1014038659e7SLuis R. Rodriguez if (!wiphy) 1015038659e7SLuis R. Rodriguez return; 1016038659e7SLuis R. Rodriguez 1017038659e7SLuis R. Rodriguez for (band = 0; band < IEEE80211_NUM_BANDS; band++) { 1018038659e7SLuis R. Rodriguez if (wiphy->bands[band]) 1019038659e7SLuis R. Rodriguez reg_process_ht_flags_band(wiphy, band); 1020038659e7SLuis R. Rodriguez } 1021038659e7SLuis R. Rodriguez 1022038659e7SLuis R. Rodriguez } 1023038659e7SLuis R. Rodriguez 10247db90f4aSLuis R. Rodriguez void wiphy_update_regulatory(struct wiphy *wiphy, 10257db90f4aSLuis R. Rodriguez enum nl80211_reg_initiator initiator) 10268318d78aSJohannes Berg { 10278318d78aSJohannes Berg enum ieee80211_band band; 1028d46e5b1dSLuis R. Rodriguez 10297db90f4aSLuis R. Rodriguez if (ignore_reg_update(wiphy, initiator)) 1030e38f8a7aSLuis R. Rodriguez goto out; 1031b2e1b302SLuis R. Rodriguez for (band = 0; band < IEEE80211_NUM_BANDS; band++) { 10328318d78aSJohannes Berg if (wiphy->bands[band]) 1033a92a3ce7SLuis R. Rodriguez handle_band(wiphy, band); 1034b2e1b302SLuis R. Rodriguez } 1035e38f8a7aSLuis R. Rodriguez out: 1036e38f8a7aSLuis R. Rodriguez reg_process_beacons(wiphy); 1037038659e7SLuis R. Rodriguez reg_process_ht_flags(wiphy); 1038b2e1b302SLuis R. Rodriguez if (wiphy->reg_notifier) 1039716f9392SLuis R. Rodriguez wiphy->reg_notifier(wiphy, last_request); 1040b2e1b302SLuis R. Rodriguez } 1041b2e1b302SLuis R. Rodriguez 10421fa25e41SLuis R. Rodriguez static void handle_channel_custom(struct wiphy *wiphy, 10431fa25e41SLuis R. Rodriguez enum ieee80211_band band, 10441fa25e41SLuis R. Rodriguez unsigned int chan_idx, 10451fa25e41SLuis R. Rodriguez const struct ieee80211_regdomain *regd) 10461fa25e41SLuis R. Rodriguez { 10471fa25e41SLuis R. Rodriguez int r; 1048038659e7SLuis R. Rodriguez u32 desired_bw_khz = MHZ_TO_KHZ(20); 1049038659e7SLuis R. Rodriguez u32 bw_flags = 0; 10501fa25e41SLuis R. Rodriguez const struct ieee80211_reg_rule *reg_rule = NULL; 10511fa25e41SLuis R. Rodriguez const struct ieee80211_power_rule *power_rule = NULL; 1052038659e7SLuis R. Rodriguez const struct ieee80211_freq_range *freq_range = NULL; 10531fa25e41SLuis R. Rodriguez struct ieee80211_supported_band *sband; 10541fa25e41SLuis R. Rodriguez struct ieee80211_channel *chan; 10551fa25e41SLuis R. Rodriguez 1056abc7381bSLuis R. Rodriguez assert_reg_lock(); 1057ac46d48eSLuis R. Rodriguez 10581fa25e41SLuis R. Rodriguez sband = wiphy->bands[band]; 10591fa25e41SLuis R. Rodriguez BUG_ON(chan_idx >= sband->n_channels); 10601fa25e41SLuis R. Rodriguez chan = &sband->channels[chan_idx]; 10611fa25e41SLuis R. Rodriguez 1062038659e7SLuis R. Rodriguez r = freq_reg_info_regd(wiphy, 1063038659e7SLuis R. Rodriguez MHZ_TO_KHZ(chan->center_freq), 1064038659e7SLuis R. Rodriguez desired_bw_khz, 1065038659e7SLuis R. Rodriguez ®_rule, 1066038659e7SLuis R. Rodriguez regd); 10671fa25e41SLuis R. Rodriguez 10681fa25e41SLuis R. Rodriguez if (r) { 10691fa25e41SLuis R. Rodriguez chan->flags = IEEE80211_CHAN_DISABLED; 10701fa25e41SLuis R. Rodriguez return; 10711fa25e41SLuis R. Rodriguez } 10721fa25e41SLuis R. Rodriguez 10731fa25e41SLuis R. Rodriguez power_rule = ®_rule->power_rule; 1074038659e7SLuis R. Rodriguez freq_range = ®_rule->freq_range; 10751fa25e41SLuis R. Rodriguez 1076038659e7SLuis R. Rodriguez if (freq_range->max_bandwidth_khz < MHZ_TO_KHZ(40)) 1077038659e7SLuis R. Rodriguez bw_flags = IEEE80211_CHAN_NO_HT40; 1078038659e7SLuis R. Rodriguez 1079038659e7SLuis R. Rodriguez chan->flags |= map_regdom_flags(reg_rule->flags) | bw_flags; 10801fa25e41SLuis R. Rodriguez chan->max_antenna_gain = (int) MBI_TO_DBI(power_rule->max_antenna_gain); 10811fa25e41SLuis R. Rodriguez chan->max_power = (int) MBM_TO_DBM(power_rule->max_eirp); 10821fa25e41SLuis R. Rodriguez } 10831fa25e41SLuis R. Rodriguez 10841fa25e41SLuis R. Rodriguez static void handle_band_custom(struct wiphy *wiphy, enum ieee80211_band band, 10851fa25e41SLuis R. Rodriguez const struct ieee80211_regdomain *regd) 10861fa25e41SLuis R. Rodriguez { 10871fa25e41SLuis R. Rodriguez unsigned int i; 10881fa25e41SLuis R. Rodriguez struct ieee80211_supported_band *sband; 10891fa25e41SLuis R. Rodriguez 10901fa25e41SLuis R. Rodriguez BUG_ON(!wiphy->bands[band]); 10911fa25e41SLuis R. Rodriguez sband = wiphy->bands[band]; 10921fa25e41SLuis R. Rodriguez 10931fa25e41SLuis R. Rodriguez for (i = 0; i < sband->n_channels; i++) 10941fa25e41SLuis R. Rodriguez handle_channel_custom(wiphy, band, i, regd); 10951fa25e41SLuis R. Rodriguez } 10961fa25e41SLuis R. Rodriguez 10971fa25e41SLuis R. Rodriguez /* Used by drivers prior to wiphy registration */ 10981fa25e41SLuis R. Rodriguez void wiphy_apply_custom_regulatory(struct wiphy *wiphy, 10991fa25e41SLuis R. Rodriguez const struct ieee80211_regdomain *regd) 11001fa25e41SLuis R. Rodriguez { 11011fa25e41SLuis R. Rodriguez enum ieee80211_band band; 1102bbcf3f02SLuis R. Rodriguez unsigned int bands_set = 0; 1103ac46d48eSLuis R. Rodriguez 1104abc7381bSLuis R. Rodriguez mutex_lock(®_mutex); 11051fa25e41SLuis R. Rodriguez for (band = 0; band < IEEE80211_NUM_BANDS; band++) { 1106bbcf3f02SLuis R. Rodriguez if (!wiphy->bands[band]) 1107bbcf3f02SLuis R. Rodriguez continue; 11081fa25e41SLuis R. Rodriguez handle_band_custom(wiphy, band, regd); 1109bbcf3f02SLuis R. Rodriguez bands_set++; 11101fa25e41SLuis R. Rodriguez } 1111abc7381bSLuis R. Rodriguez mutex_unlock(®_mutex); 1112bbcf3f02SLuis R. Rodriguez 1113bbcf3f02SLuis R. Rodriguez /* 1114bbcf3f02SLuis R. Rodriguez * no point in calling this if it won't have any effect 1115bbcf3f02SLuis R. Rodriguez * on your device's supportd bands. 1116bbcf3f02SLuis R. Rodriguez */ 1117bbcf3f02SLuis R. Rodriguez WARN_ON(!bands_set); 11181fa25e41SLuis R. Rodriguez } 11191fa25e41SLuis R. Rodriguez EXPORT_SYMBOL(wiphy_apply_custom_regulatory); 11201fa25e41SLuis R. Rodriguez 1121fb1fc7adSLuis R. Rodriguez /* 1122fb1fc7adSLuis R. Rodriguez * Return value which can be used by ignore_request() to indicate 1123fb1fc7adSLuis R. Rodriguez * it has been determined we should intersect two regulatory domains 1124fb1fc7adSLuis R. Rodriguez */ 11259c96477dSLuis R. Rodriguez #define REG_INTERSECT 1 11269c96477dSLuis R. Rodriguez 112784fa4f43SJohannes Berg /* This has the logic which determines when a new request 112884fa4f43SJohannes Berg * should be ignored. */ 11292f92cd2eSLuis R. Rodriguez static int ignore_request(struct wiphy *wiphy, 11302f92cd2eSLuis R. Rodriguez struct regulatory_request *pending_request) 113184fa4f43SJohannes Berg { 1132806a9e39SLuis R. Rodriguez struct wiphy *last_wiphy = NULL; 1133761cf7ecSLuis R. Rodriguez 1134761cf7ecSLuis R. Rodriguez assert_cfg80211_lock(); 1135761cf7ecSLuis R. Rodriguez 113684fa4f43SJohannes Berg /* All initial requests are respected */ 113784fa4f43SJohannes Berg if (!last_request) 113884fa4f43SJohannes Berg return 0; 113984fa4f43SJohannes Berg 11402f92cd2eSLuis R. Rodriguez switch (pending_request->initiator) { 11417db90f4aSLuis R. Rodriguez case NL80211_REGDOM_SET_BY_CORE: 114209d989d1SLuis R. Rodriguez return 0; 11437db90f4aSLuis R. Rodriguez case NL80211_REGDOM_SET_BY_COUNTRY_IE: 1144806a9e39SLuis R. Rodriguez 1145806a9e39SLuis R. Rodriguez last_wiphy = wiphy_idx_to_wiphy(last_request->wiphy_idx); 1146806a9e39SLuis R. Rodriguez 11472f92cd2eSLuis R. Rodriguez if (unlikely(!is_an_alpha2(pending_request->alpha2))) 114884fa4f43SJohannes Berg return -EINVAL; 11497db90f4aSLuis R. Rodriguez if (last_request->initiator == 11507db90f4aSLuis R. Rodriguez NL80211_REGDOM_SET_BY_COUNTRY_IE) { 1151806a9e39SLuis R. Rodriguez if (last_wiphy != wiphy) { 115284fa4f43SJohannes Berg /* 115384fa4f43SJohannes Berg * Two cards with two APs claiming different 11541fe90b03SThadeu Lima de Souza Cascardo * Country IE alpha2s. We could 115584fa4f43SJohannes Berg * intersect them, but that seems unlikely 115684fa4f43SJohannes Berg * to be correct. Reject second one for now. 115784fa4f43SJohannes Berg */ 11582f92cd2eSLuis R. Rodriguez if (regdom_changes(pending_request->alpha2)) 115984fa4f43SJohannes Berg return -EOPNOTSUPP; 116084fa4f43SJohannes Berg return -EALREADY; 116184fa4f43SJohannes Berg } 1162fb1fc7adSLuis R. Rodriguez /* 1163fb1fc7adSLuis R. Rodriguez * Two consecutive Country IE hints on the same wiphy. 1164fb1fc7adSLuis R. Rodriguez * This should be picked up early by the driver/stack 1165fb1fc7adSLuis R. Rodriguez */ 11662f92cd2eSLuis R. Rodriguez if (WARN_ON(regdom_changes(pending_request->alpha2))) 116784fa4f43SJohannes Berg return 0; 116884fa4f43SJohannes Berg return -EALREADY; 116984fa4f43SJohannes Berg } 1170a171fba4SLuis R. Rodriguez return 0; 11717db90f4aSLuis R. Rodriguez case NL80211_REGDOM_SET_BY_DRIVER: 11727db90f4aSLuis R. Rodriguez if (last_request->initiator == NL80211_REGDOM_SET_BY_CORE) { 11732f92cd2eSLuis R. Rodriguez if (regdom_changes(pending_request->alpha2)) 1174e74b1e7fSLuis R. Rodriguez return 0; 1175e74b1e7fSLuis R. Rodriguez return -EALREADY; 1176e74b1e7fSLuis R. Rodriguez } 1177fff32c04SLuis R. Rodriguez 1178fff32c04SLuis R. Rodriguez /* 1179fff32c04SLuis R. Rodriguez * This would happen if you unplug and plug your card 1180fff32c04SLuis R. Rodriguez * back in or if you add a new device for which the previously 1181fff32c04SLuis R. Rodriguez * loaded card also agrees on the regulatory domain. 1182fff32c04SLuis R. Rodriguez */ 11837db90f4aSLuis R. Rodriguez if (last_request->initiator == NL80211_REGDOM_SET_BY_DRIVER && 11842f92cd2eSLuis R. Rodriguez !regdom_changes(pending_request->alpha2)) 1185fff32c04SLuis R. Rodriguez return -EALREADY; 1186fff32c04SLuis R. Rodriguez 11873e0c3ff3SLuis R. Rodriguez return REG_INTERSECT; 11887db90f4aSLuis R. Rodriguez case NL80211_REGDOM_SET_BY_USER: 11897db90f4aSLuis R. Rodriguez if (last_request->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) 11909c96477dSLuis R. Rodriguez return REG_INTERSECT; 1191fb1fc7adSLuis R. Rodriguez /* 1192fb1fc7adSLuis R. Rodriguez * If the user knows better the user should set the regdom 1193fb1fc7adSLuis R. Rodriguez * to their country before the IE is picked up 1194fb1fc7adSLuis R. Rodriguez */ 11957db90f4aSLuis R. Rodriguez if (last_request->initiator == NL80211_REGDOM_SET_BY_USER && 11963f2355cbSLuis R. Rodriguez last_request->intersect) 11973f2355cbSLuis R. Rodriguez return -EOPNOTSUPP; 1198fb1fc7adSLuis R. Rodriguez /* 1199fb1fc7adSLuis R. Rodriguez * Process user requests only after previous user/driver/core 1200fb1fc7adSLuis R. Rodriguez * requests have been processed 1201fb1fc7adSLuis R. Rodriguez */ 12027db90f4aSLuis R. Rodriguez if (last_request->initiator == NL80211_REGDOM_SET_BY_CORE || 12037db90f4aSLuis R. Rodriguez last_request->initiator == NL80211_REGDOM_SET_BY_DRIVER || 12047db90f4aSLuis R. Rodriguez last_request->initiator == NL80211_REGDOM_SET_BY_USER) { 120569b1572bSLuis R. Rodriguez if (regdom_changes(last_request->alpha2)) 12065eebade6SLuis R. Rodriguez return -EAGAIN; 12075eebade6SLuis R. Rodriguez } 12085eebade6SLuis R. Rodriguez 1209baeb66feSJohn W. Linville if (!regdom_changes(pending_request->alpha2)) 1210e74b1e7fSLuis R. Rodriguez return -EALREADY; 1211e74b1e7fSLuis R. Rodriguez 121284fa4f43SJohannes Berg return 0; 121384fa4f43SJohannes Berg } 121484fa4f43SJohannes Berg 121584fa4f43SJohannes Berg return -EINVAL; 121684fa4f43SJohannes Berg } 121784fa4f43SJohannes Berg 1218d1c96a9aSLuis R. Rodriguez /** 1219d1c96a9aSLuis R. Rodriguez * __regulatory_hint - hint to the wireless core a regulatory domain 1220d1c96a9aSLuis R. Rodriguez * @wiphy: if the hint comes from country information from an AP, this 1221d1c96a9aSLuis R. Rodriguez * is required to be set to the wiphy that received the information 122228da32d7SLuis R. Rodriguez * @pending_request: the regulatory request currently being processed 1223d1c96a9aSLuis R. Rodriguez * 1224d1c96a9aSLuis R. Rodriguez * The Wireless subsystem can use this function to hint to the wireless core 122528da32d7SLuis R. Rodriguez * what it believes should be the current regulatory domain. 1226d1c96a9aSLuis R. Rodriguez * 1227d1c96a9aSLuis R. Rodriguez * Returns zero if all went fine, %-EALREADY if a regulatory domain had 1228d1c96a9aSLuis R. Rodriguez * already been set or other standard error codes. 1229d1c96a9aSLuis R. Rodriguez * 1230abc7381bSLuis R. Rodriguez * Caller must hold &cfg80211_mutex and ®_mutex 1231d1c96a9aSLuis R. Rodriguez */ 123228da32d7SLuis R. Rodriguez static int __regulatory_hint(struct wiphy *wiphy, 123328da32d7SLuis R. Rodriguez struct regulatory_request *pending_request) 1234b2e1b302SLuis R. Rodriguez { 12359c96477dSLuis R. Rodriguez bool intersect = false; 1236b2e1b302SLuis R. Rodriguez int r = 0; 1237b2e1b302SLuis R. Rodriguez 1238761cf7ecSLuis R. Rodriguez assert_cfg80211_lock(); 1239761cf7ecSLuis R. Rodriguez 12402f92cd2eSLuis R. Rodriguez r = ignore_request(wiphy, pending_request); 12419c96477dSLuis R. Rodriguez 12423e0c3ff3SLuis R. Rodriguez if (r == REG_INTERSECT) { 12437db90f4aSLuis R. Rodriguez if (pending_request->initiator == 12447db90f4aSLuis R. Rodriguez NL80211_REGDOM_SET_BY_DRIVER) { 12453e0c3ff3SLuis R. Rodriguez r = reg_copy_regd(&wiphy->regd, cfg80211_regdomain); 1246d951c1ddSLuis R. Rodriguez if (r) { 1247d951c1ddSLuis R. Rodriguez kfree(pending_request); 1248b2e1b302SLuis R. Rodriguez return r; 12493e0c3ff3SLuis R. Rodriguez } 1250d951c1ddSLuis R. Rodriguez } 12513e0c3ff3SLuis R. Rodriguez intersect = true; 12523e0c3ff3SLuis R. Rodriguez } else if (r) { 1253fb1fc7adSLuis R. Rodriguez /* 1254fb1fc7adSLuis R. Rodriguez * If the regulatory domain being requested by the 12553e0c3ff3SLuis R. Rodriguez * driver has already been set just copy it to the 1256fb1fc7adSLuis R. Rodriguez * wiphy 1257fb1fc7adSLuis R. Rodriguez */ 125828da32d7SLuis R. Rodriguez if (r == -EALREADY && 12597db90f4aSLuis R. Rodriguez pending_request->initiator == 12607db90f4aSLuis R. Rodriguez NL80211_REGDOM_SET_BY_DRIVER) { 12613e0c3ff3SLuis R. Rodriguez r = reg_copy_regd(&wiphy->regd, cfg80211_regdomain); 1262d951c1ddSLuis R. Rodriguez if (r) { 1263d951c1ddSLuis R. Rodriguez kfree(pending_request); 12643e0c3ff3SLuis R. Rodriguez return r; 1265d951c1ddSLuis R. Rodriguez } 12663e0c3ff3SLuis R. Rodriguez r = -EALREADY; 12673e0c3ff3SLuis R. Rodriguez goto new_request; 12683e0c3ff3SLuis R. Rodriguez } 1269d951c1ddSLuis R. Rodriguez kfree(pending_request); 12703e0c3ff3SLuis R. Rodriguez return r; 12713e0c3ff3SLuis R. Rodriguez } 1272b2e1b302SLuis R. Rodriguez 12733e0c3ff3SLuis R. Rodriguez new_request: 1274f6037d09SJohannes Berg kfree(last_request); 1275d951c1ddSLuis R. Rodriguez 1276d951c1ddSLuis R. Rodriguez last_request = pending_request; 1277d951c1ddSLuis R. Rodriguez last_request->intersect = intersect; 1278d951c1ddSLuis R. Rodriguez 1279d951c1ddSLuis R. Rodriguez pending_request = NULL; 12803e0c3ff3SLuis R. Rodriguez 128109d989d1SLuis R. Rodriguez if (last_request->initiator == NL80211_REGDOM_SET_BY_USER) { 128209d989d1SLuis R. Rodriguez user_alpha2[0] = last_request->alpha2[0]; 128309d989d1SLuis R. Rodriguez user_alpha2[1] = last_request->alpha2[1]; 128409d989d1SLuis R. Rodriguez } 128509d989d1SLuis R. Rodriguez 12863e0c3ff3SLuis R. Rodriguez /* When r == REG_INTERSECT we do need to call CRDA */ 128773d54c9eSLuis R. Rodriguez if (r < 0) { 128873d54c9eSLuis R. Rodriguez /* 128973d54c9eSLuis R. Rodriguez * Since CRDA will not be called in this case as we already 129073d54c9eSLuis R. Rodriguez * have applied the requested regulatory domain before we just 129173d54c9eSLuis R. Rodriguez * inform userspace we have processed the request 129273d54c9eSLuis R. Rodriguez */ 129373d54c9eSLuis R. Rodriguez if (r == -EALREADY) 129473d54c9eSLuis R. Rodriguez nl80211_send_reg_change_event(last_request); 12953e0c3ff3SLuis R. Rodriguez return r; 129673d54c9eSLuis R. Rodriguez } 12973e0c3ff3SLuis R. Rodriguez 1298d951c1ddSLuis R. Rodriguez return call_crda(last_request->alpha2); 1299b2e1b302SLuis R. Rodriguez } 1300b2e1b302SLuis R. Rodriguez 130130a548c7SLuis R. Rodriguez /* This processes *all* regulatory hints */ 1302d951c1ddSLuis R. Rodriguez static void reg_process_hint(struct regulatory_request *reg_request) 1303fe33eb39SLuis R. Rodriguez { 1304fe33eb39SLuis R. Rodriguez int r = 0; 1305fe33eb39SLuis R. Rodriguez struct wiphy *wiphy = NULL; 1306c4c32294SYuri Ershov enum nl80211_reg_initiator initiator = reg_request->initiator; 1307fe33eb39SLuis R. Rodriguez 1308fe33eb39SLuis R. Rodriguez BUG_ON(!reg_request->alpha2); 1309fe33eb39SLuis R. Rodriguez 1310fe33eb39SLuis R. Rodriguez mutex_lock(&cfg80211_mutex); 1311abc7381bSLuis R. Rodriguez mutex_lock(®_mutex); 1312fe33eb39SLuis R. Rodriguez 1313fe33eb39SLuis R. Rodriguez if (wiphy_idx_valid(reg_request->wiphy_idx)) 1314fe33eb39SLuis R. Rodriguez wiphy = wiphy_idx_to_wiphy(reg_request->wiphy_idx); 1315fe33eb39SLuis R. Rodriguez 13167db90f4aSLuis R. Rodriguez if (reg_request->initiator == NL80211_REGDOM_SET_BY_DRIVER && 1317fe33eb39SLuis R. Rodriguez !wiphy) { 1318d951c1ddSLuis R. Rodriguez kfree(reg_request); 1319fe33eb39SLuis R. Rodriguez goto out; 1320fe33eb39SLuis R. Rodriguez } 1321fe33eb39SLuis R. Rodriguez 132228da32d7SLuis R. Rodriguez r = __regulatory_hint(wiphy, reg_request); 1323fe33eb39SLuis R. Rodriguez /* This is required so that the orig_* parameters are saved */ 13245be83de5SJohannes Berg if (r == -EALREADY && wiphy && 13255be83de5SJohannes Berg wiphy->flags & WIPHY_FLAG_STRICT_REGULATORY) 1326c4c32294SYuri Ershov wiphy_update_regulatory(wiphy, initiator); 1327fe33eb39SLuis R. Rodriguez out: 1328abc7381bSLuis R. Rodriguez mutex_unlock(®_mutex); 1329fe33eb39SLuis R. Rodriguez mutex_unlock(&cfg80211_mutex); 1330fe33eb39SLuis R. Rodriguez } 1331fe33eb39SLuis R. Rodriguez 13327db90f4aSLuis R. Rodriguez /* Processes regulatory hints, this is all the NL80211_REGDOM_SET_BY_* */ 1333fe33eb39SLuis R. Rodriguez static void reg_process_pending_hints(void) 1334fe33eb39SLuis R. Rodriguez { 1335fe33eb39SLuis R. Rodriguez struct regulatory_request *reg_request; 1336fe33eb39SLuis R. Rodriguez 1337fe33eb39SLuis R. Rodriguez spin_lock(®_requests_lock); 1338fe33eb39SLuis R. Rodriguez while (!list_empty(®_requests_list)) { 1339fe33eb39SLuis R. Rodriguez reg_request = list_first_entry(®_requests_list, 1340fe33eb39SLuis R. Rodriguez struct regulatory_request, 1341fe33eb39SLuis R. Rodriguez list); 1342fe33eb39SLuis R. Rodriguez list_del_init(®_request->list); 1343fe33eb39SLuis R. Rodriguez 1344d951c1ddSLuis R. Rodriguez spin_unlock(®_requests_lock); 1345d951c1ddSLuis R. Rodriguez reg_process_hint(reg_request); 1346fe33eb39SLuis R. Rodriguez spin_lock(®_requests_lock); 1347fe33eb39SLuis R. Rodriguez } 1348fe33eb39SLuis R. Rodriguez spin_unlock(®_requests_lock); 1349fe33eb39SLuis R. Rodriguez } 1350fe33eb39SLuis R. Rodriguez 1351e38f8a7aSLuis R. Rodriguez /* Processes beacon hints -- this has nothing to do with country IEs */ 1352e38f8a7aSLuis R. Rodriguez static void reg_process_pending_beacon_hints(void) 1353e38f8a7aSLuis R. Rodriguez { 135479c97e97SJohannes Berg struct cfg80211_registered_device *rdev; 1355e38f8a7aSLuis R. Rodriguez struct reg_beacon *pending_beacon, *tmp; 1356e38f8a7aSLuis R. Rodriguez 1357abc7381bSLuis R. Rodriguez /* 1358abc7381bSLuis R. Rodriguez * No need to hold the reg_mutex here as we just touch wiphys 1359abc7381bSLuis R. Rodriguez * and do not read or access regulatory variables. 1360abc7381bSLuis R. Rodriguez */ 1361e38f8a7aSLuis R. Rodriguez mutex_lock(&cfg80211_mutex); 1362e38f8a7aSLuis R. Rodriguez 1363e38f8a7aSLuis R. Rodriguez /* This goes through the _pending_ beacon list */ 1364e38f8a7aSLuis R. Rodriguez spin_lock_bh(®_pending_beacons_lock); 1365e38f8a7aSLuis R. Rodriguez 1366e38f8a7aSLuis R. Rodriguez if (list_empty(®_pending_beacons)) { 1367e38f8a7aSLuis R. Rodriguez spin_unlock_bh(®_pending_beacons_lock); 1368e38f8a7aSLuis R. Rodriguez goto out; 1369e38f8a7aSLuis R. Rodriguez } 1370e38f8a7aSLuis R. Rodriguez 1371e38f8a7aSLuis R. Rodriguez list_for_each_entry_safe(pending_beacon, tmp, 1372e38f8a7aSLuis R. Rodriguez ®_pending_beacons, list) { 1373e38f8a7aSLuis R. Rodriguez 1374e38f8a7aSLuis R. Rodriguez list_del_init(&pending_beacon->list); 1375e38f8a7aSLuis R. Rodriguez 1376e38f8a7aSLuis R. Rodriguez /* Applies the beacon hint to current wiphys */ 137779c97e97SJohannes Berg list_for_each_entry(rdev, &cfg80211_rdev_list, list) 137879c97e97SJohannes Berg wiphy_update_new_beacon(&rdev->wiphy, pending_beacon); 1379e38f8a7aSLuis R. Rodriguez 1380e38f8a7aSLuis R. Rodriguez /* Remembers the beacon hint for new wiphys or reg changes */ 1381e38f8a7aSLuis R. Rodriguez list_add_tail(&pending_beacon->list, ®_beacon_list); 1382e38f8a7aSLuis R. Rodriguez } 1383e38f8a7aSLuis R. Rodriguez 1384e38f8a7aSLuis R. Rodriguez spin_unlock_bh(®_pending_beacons_lock); 1385e38f8a7aSLuis R. Rodriguez out: 1386e38f8a7aSLuis R. Rodriguez mutex_unlock(&cfg80211_mutex); 1387e38f8a7aSLuis R. Rodriguez } 1388e38f8a7aSLuis R. Rodriguez 1389fe33eb39SLuis R. Rodriguez static void reg_todo(struct work_struct *work) 1390fe33eb39SLuis R. Rodriguez { 1391fe33eb39SLuis R. Rodriguez reg_process_pending_hints(); 1392e38f8a7aSLuis R. Rodriguez reg_process_pending_beacon_hints(); 1393fe33eb39SLuis R. Rodriguez } 1394fe33eb39SLuis R. Rodriguez 1395fe33eb39SLuis R. Rodriguez static DECLARE_WORK(reg_work, reg_todo); 1396fe33eb39SLuis R. Rodriguez 1397fe33eb39SLuis R. Rodriguez static void queue_regulatory_request(struct regulatory_request *request) 1398fe33eb39SLuis R. Rodriguez { 1399c61029c7SJohn W. Linville if (isalpha(request->alpha2[0])) 1400c61029c7SJohn W. Linville request->alpha2[0] = toupper(request->alpha2[0]); 1401c61029c7SJohn W. Linville if (isalpha(request->alpha2[1])) 1402c61029c7SJohn W. Linville request->alpha2[1] = toupper(request->alpha2[1]); 1403c61029c7SJohn W. Linville 1404fe33eb39SLuis R. Rodriguez spin_lock(®_requests_lock); 1405fe33eb39SLuis R. Rodriguez list_add_tail(&request->list, ®_requests_list); 1406fe33eb39SLuis R. Rodriguez spin_unlock(®_requests_lock); 1407fe33eb39SLuis R. Rodriguez 1408fe33eb39SLuis R. Rodriguez schedule_work(®_work); 1409fe33eb39SLuis R. Rodriguez } 1410fe33eb39SLuis R. Rodriguez 141109d989d1SLuis R. Rodriguez /* 141209d989d1SLuis R. Rodriguez * Core regulatory hint -- happens during cfg80211_init() 141309d989d1SLuis R. Rodriguez * and when we restore regulatory settings. 141409d989d1SLuis R. Rodriguez */ 1415ba25c141SLuis R. Rodriguez static int regulatory_hint_core(const char *alpha2) 1416ba25c141SLuis R. Rodriguez { 1417ba25c141SLuis R. Rodriguez struct regulatory_request *request; 1418ba25c141SLuis R. Rodriguez 141909d989d1SLuis R. Rodriguez kfree(last_request); 142009d989d1SLuis R. Rodriguez last_request = NULL; 1421ba25c141SLuis R. Rodriguez 1422ba25c141SLuis R. Rodriguez request = kzalloc(sizeof(struct regulatory_request), 1423ba25c141SLuis R. Rodriguez GFP_KERNEL); 1424ba25c141SLuis R. Rodriguez if (!request) 1425ba25c141SLuis R. Rodriguez return -ENOMEM; 1426ba25c141SLuis R. Rodriguez 1427ba25c141SLuis R. Rodriguez request->alpha2[0] = alpha2[0]; 1428ba25c141SLuis R. Rodriguez request->alpha2[1] = alpha2[1]; 14297db90f4aSLuis R. Rodriguez request->initiator = NL80211_REGDOM_SET_BY_CORE; 1430ba25c141SLuis R. Rodriguez 14315078b2e3SLuis R. Rodriguez /* 14325078b2e3SLuis R. Rodriguez * This ensures last_request is populated once modules 14335078b2e3SLuis R. Rodriguez * come swinging in and calling regulatory hints and 14345078b2e3SLuis R. Rodriguez * wiphy_apply_custom_regulatory(). 14355078b2e3SLuis R. Rodriguez */ 1436a2bff269SLuis R. Rodriguez reg_process_hint(request); 14375078b2e3SLuis R. Rodriguez 1438fe33eb39SLuis R. Rodriguez return 0; 1439ba25c141SLuis R. Rodriguez } 1440ba25c141SLuis R. Rodriguez 1441fe33eb39SLuis R. Rodriguez /* User hints */ 1442fe33eb39SLuis R. Rodriguez int regulatory_hint_user(const char *alpha2) 1443b2e1b302SLuis R. Rodriguez { 1444fe33eb39SLuis R. Rodriguez struct regulatory_request *request; 1445fe33eb39SLuis R. Rodriguez 1446be3d4810SJohannes Berg BUG_ON(!alpha2); 1447b2e1b302SLuis R. Rodriguez 1448fe33eb39SLuis R. Rodriguez request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); 1449fe33eb39SLuis R. Rodriguez if (!request) 1450fe33eb39SLuis R. Rodriguez return -ENOMEM; 1451fe33eb39SLuis R. Rodriguez 1452fe33eb39SLuis R. Rodriguez request->wiphy_idx = WIPHY_IDX_STALE; 1453fe33eb39SLuis R. Rodriguez request->alpha2[0] = alpha2[0]; 1454fe33eb39SLuis R. Rodriguez request->alpha2[1] = alpha2[1]; 1455e12822e1SLuis R. Rodriguez request->initiator = NL80211_REGDOM_SET_BY_USER; 1456fe33eb39SLuis R. Rodriguez 1457fe33eb39SLuis R. Rodriguez queue_regulatory_request(request); 1458fe33eb39SLuis R. Rodriguez 1459fe33eb39SLuis R. Rodriguez return 0; 1460fe33eb39SLuis R. Rodriguez } 1461fe33eb39SLuis R. Rodriguez 1462fe33eb39SLuis R. Rodriguez /* Driver hints */ 1463fe33eb39SLuis R. Rodriguez int regulatory_hint(struct wiphy *wiphy, const char *alpha2) 1464fe33eb39SLuis R. Rodriguez { 1465fe33eb39SLuis R. Rodriguez struct regulatory_request *request; 1466fe33eb39SLuis R. Rodriguez 1467fe33eb39SLuis R. Rodriguez BUG_ON(!alpha2); 1468fe33eb39SLuis R. Rodriguez BUG_ON(!wiphy); 1469fe33eb39SLuis R. Rodriguez 1470fe33eb39SLuis R. Rodriguez request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); 1471fe33eb39SLuis R. Rodriguez if (!request) 1472fe33eb39SLuis R. Rodriguez return -ENOMEM; 1473fe33eb39SLuis R. Rodriguez 1474fe33eb39SLuis R. Rodriguez request->wiphy_idx = get_wiphy_idx(wiphy); 1475fe33eb39SLuis R. Rodriguez 1476fe33eb39SLuis R. Rodriguez /* Must have registered wiphy first */ 1477fe33eb39SLuis R. Rodriguez BUG_ON(!wiphy_idx_valid(request->wiphy_idx)); 1478fe33eb39SLuis R. Rodriguez 1479fe33eb39SLuis R. Rodriguez request->alpha2[0] = alpha2[0]; 1480fe33eb39SLuis R. Rodriguez request->alpha2[1] = alpha2[1]; 14817db90f4aSLuis R. Rodriguez request->initiator = NL80211_REGDOM_SET_BY_DRIVER; 1482fe33eb39SLuis R. Rodriguez 1483fe33eb39SLuis R. Rodriguez queue_regulatory_request(request); 1484fe33eb39SLuis R. Rodriguez 1485fe33eb39SLuis R. Rodriguez return 0; 1486b2e1b302SLuis R. Rodriguez } 1487b2e1b302SLuis R. Rodriguez EXPORT_SYMBOL(regulatory_hint); 1488b2e1b302SLuis R. Rodriguez 14894b44c8bcSLuis R. Rodriguez /* 14904b44c8bcSLuis R. Rodriguez * We hold wdev_lock() here so we cannot hold cfg80211_mutex() and 14914b44c8bcSLuis R. Rodriguez * therefore cannot iterate over the rdev list here. 14924b44c8bcSLuis R. Rodriguez */ 14933f2355cbSLuis R. Rodriguez void regulatory_hint_11d(struct wiphy *wiphy, 149484920e3eSLuis R. Rodriguez enum ieee80211_band band, 14953f2355cbSLuis R. Rodriguez u8 *country_ie, 14963f2355cbSLuis R. Rodriguez u8 country_ie_len) 14973f2355cbSLuis R. Rodriguez { 14983f2355cbSLuis R. Rodriguez char alpha2[2]; 14993f2355cbSLuis R. Rodriguez enum environment_cap env = ENVIRON_ANY; 1500fe33eb39SLuis R. Rodriguez struct regulatory_request *request; 15013f2355cbSLuis R. Rodriguez 1502abc7381bSLuis R. Rodriguez mutex_lock(®_mutex); 15033f2355cbSLuis R. Rodriguez 15049828b017SLuis R. Rodriguez if (unlikely(!last_request)) 15059828b017SLuis R. Rodriguez goto out; 1506d335fe63SLuis R. Rodriguez 15073f2355cbSLuis R. Rodriguez /* IE len must be evenly divisible by 2 */ 15083f2355cbSLuis R. Rodriguez if (country_ie_len & 0x01) 15093f2355cbSLuis R. Rodriguez goto out; 15103f2355cbSLuis R. Rodriguez 15113f2355cbSLuis R. Rodriguez if (country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN) 15123f2355cbSLuis R. Rodriguez goto out; 15133f2355cbSLuis R. Rodriguez 15143f2355cbSLuis R. Rodriguez alpha2[0] = country_ie[0]; 15153f2355cbSLuis R. Rodriguez alpha2[1] = country_ie[1]; 15163f2355cbSLuis R. Rodriguez 15173f2355cbSLuis R. Rodriguez if (country_ie[2] == 'I') 15183f2355cbSLuis R. Rodriguez env = ENVIRON_INDOOR; 15193f2355cbSLuis R. Rodriguez else if (country_ie[2] == 'O') 15203f2355cbSLuis R. Rodriguez env = ENVIRON_OUTDOOR; 15213f2355cbSLuis R. Rodriguez 1522fb1fc7adSLuis R. Rodriguez /* 15238b19e6caSLuis R. Rodriguez * We will run this only upon a successful connection on cfg80211. 15244b44c8bcSLuis R. Rodriguez * We leave conflict resolution to the workqueue, where can hold 15254b44c8bcSLuis R. Rodriguez * cfg80211_mutex. 1526fb1fc7adSLuis R. Rodriguez */ 1527cc0b6fe8SLuis R. Rodriguez if (likely(last_request->initiator == 1528cc0b6fe8SLuis R. Rodriguez NL80211_REGDOM_SET_BY_COUNTRY_IE && 15294b44c8bcSLuis R. Rodriguez wiphy_idx_valid(last_request->wiphy_idx))) 15303f2355cbSLuis R. Rodriguez goto out; 15313f2355cbSLuis R. Rodriguez 1532fe33eb39SLuis R. Rodriguez request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); 1533fe33eb39SLuis R. Rodriguez if (!request) 1534f9f9b6e3SDan Carpenter goto out; 1535fe33eb39SLuis R. Rodriguez 1536fe33eb39SLuis R. Rodriguez request->wiphy_idx = get_wiphy_idx(wiphy); 15374f366c5dSJohn W. Linville request->alpha2[0] = alpha2[0]; 15384f366c5dSJohn W. Linville request->alpha2[1] = alpha2[1]; 15397db90f4aSLuis R. Rodriguez request->initiator = NL80211_REGDOM_SET_BY_COUNTRY_IE; 1540fe33eb39SLuis R. Rodriguez request->country_ie_env = env; 15413f2355cbSLuis R. Rodriguez 1542abc7381bSLuis R. Rodriguez mutex_unlock(®_mutex); 1543fe33eb39SLuis R. Rodriguez 1544fe33eb39SLuis R. Rodriguez queue_regulatory_request(request); 1545fe33eb39SLuis R. Rodriguez 1546fe33eb39SLuis R. Rodriguez return; 15470441d6ffSLuis R. Rodriguez 15483f2355cbSLuis R. Rodriguez out: 1549abc7381bSLuis R. Rodriguez mutex_unlock(®_mutex); 15503f2355cbSLuis R. Rodriguez } 1551b2e1b302SLuis R. Rodriguez 155209d989d1SLuis R. Rodriguez static void restore_alpha2(char *alpha2, bool reset_user) 155309d989d1SLuis R. Rodriguez { 155409d989d1SLuis R. Rodriguez /* indicates there is no alpha2 to consider for restoration */ 155509d989d1SLuis R. Rodriguez alpha2[0] = '9'; 155609d989d1SLuis R. Rodriguez alpha2[1] = '7'; 155709d989d1SLuis R. Rodriguez 155809d989d1SLuis R. Rodriguez /* The user setting has precedence over the module parameter */ 155909d989d1SLuis R. Rodriguez if (is_user_regdom_saved()) { 156009d989d1SLuis R. Rodriguez /* Unless we're asked to ignore it and reset it */ 156109d989d1SLuis R. Rodriguez if (reset_user) { 156209d989d1SLuis R. Rodriguez REG_DBG_PRINT("cfg80211: Restoring regulatory settings " 156309d989d1SLuis R. Rodriguez "including user preference\n"); 156409d989d1SLuis R. Rodriguez user_alpha2[0] = '9'; 156509d989d1SLuis R. Rodriguez user_alpha2[1] = '7'; 156609d989d1SLuis R. Rodriguez 156709d989d1SLuis R. Rodriguez /* 156809d989d1SLuis R. Rodriguez * If we're ignoring user settings, we still need to 156909d989d1SLuis R. Rodriguez * check the module parameter to ensure we put things 157009d989d1SLuis R. Rodriguez * back as they were for a full restore. 157109d989d1SLuis R. Rodriguez */ 157209d989d1SLuis R. Rodriguez if (!is_world_regdom(ieee80211_regdom)) { 157309d989d1SLuis R. Rodriguez REG_DBG_PRINT("cfg80211: Keeping preference on " 157409d989d1SLuis R. Rodriguez "module parameter ieee80211_regdom: %c%c\n", 157509d989d1SLuis R. Rodriguez ieee80211_regdom[0], 157609d989d1SLuis R. Rodriguez ieee80211_regdom[1]); 157709d989d1SLuis R. Rodriguez alpha2[0] = ieee80211_regdom[0]; 157809d989d1SLuis R. Rodriguez alpha2[1] = ieee80211_regdom[1]; 157909d989d1SLuis R. Rodriguez } 158009d989d1SLuis R. Rodriguez } else { 158109d989d1SLuis R. Rodriguez REG_DBG_PRINT("cfg80211: Restoring regulatory settings " 158209d989d1SLuis R. Rodriguez "while preserving user preference for: %c%c\n", 158309d989d1SLuis R. Rodriguez user_alpha2[0], 158409d989d1SLuis R. Rodriguez user_alpha2[1]); 158509d989d1SLuis R. Rodriguez alpha2[0] = user_alpha2[0]; 158609d989d1SLuis R. Rodriguez alpha2[1] = user_alpha2[1]; 158709d989d1SLuis R. Rodriguez } 158809d989d1SLuis R. Rodriguez } else if (!is_world_regdom(ieee80211_regdom)) { 158909d989d1SLuis R. Rodriguez REG_DBG_PRINT("cfg80211: Keeping preference on " 159009d989d1SLuis R. Rodriguez "module parameter ieee80211_regdom: %c%c\n", 159109d989d1SLuis R. Rodriguez ieee80211_regdom[0], 159209d989d1SLuis R. Rodriguez ieee80211_regdom[1]); 159309d989d1SLuis R. Rodriguez alpha2[0] = ieee80211_regdom[0]; 159409d989d1SLuis R. Rodriguez alpha2[1] = ieee80211_regdom[1]; 159509d989d1SLuis R. Rodriguez } else 159609d989d1SLuis R. Rodriguez REG_DBG_PRINT("cfg80211: Restoring regulatory settings\n"); 159709d989d1SLuis R. Rodriguez } 159809d989d1SLuis R. Rodriguez 159909d989d1SLuis R. Rodriguez /* 160009d989d1SLuis R. Rodriguez * Restoring regulatory settings involves ingoring any 160109d989d1SLuis R. Rodriguez * possibly stale country IE information and user regulatory 160209d989d1SLuis R. Rodriguez * settings if so desired, this includes any beacon hints 160309d989d1SLuis R. Rodriguez * learned as we could have traveled outside to another country 160409d989d1SLuis R. Rodriguez * after disconnection. To restore regulatory settings we do 160509d989d1SLuis R. Rodriguez * exactly what we did at bootup: 160609d989d1SLuis R. Rodriguez * 160709d989d1SLuis R. Rodriguez * - send a core regulatory hint 160809d989d1SLuis R. Rodriguez * - send a user regulatory hint if applicable 160909d989d1SLuis R. Rodriguez * 161009d989d1SLuis R. Rodriguez * Device drivers that send a regulatory hint for a specific country 161109d989d1SLuis R. Rodriguez * keep their own regulatory domain on wiphy->regd so that does does 161209d989d1SLuis R. Rodriguez * not need to be remembered. 161309d989d1SLuis R. Rodriguez */ 161409d989d1SLuis R. Rodriguez static void restore_regulatory_settings(bool reset_user) 161509d989d1SLuis R. Rodriguez { 161609d989d1SLuis R. Rodriguez char alpha2[2]; 161709d989d1SLuis R. Rodriguez struct reg_beacon *reg_beacon, *btmp; 161809d989d1SLuis R. Rodriguez 161909d989d1SLuis R. Rodriguez mutex_lock(&cfg80211_mutex); 162009d989d1SLuis R. Rodriguez mutex_lock(®_mutex); 162109d989d1SLuis R. Rodriguez 162209d989d1SLuis R. Rodriguez reset_regdomains(); 162309d989d1SLuis R. Rodriguez restore_alpha2(alpha2, reset_user); 162409d989d1SLuis R. Rodriguez 162509d989d1SLuis R. Rodriguez /* Clear beacon hints */ 162609d989d1SLuis R. Rodriguez spin_lock_bh(®_pending_beacons_lock); 162709d989d1SLuis R. Rodriguez if (!list_empty(®_pending_beacons)) { 162809d989d1SLuis R. Rodriguez list_for_each_entry_safe(reg_beacon, btmp, 162909d989d1SLuis R. Rodriguez ®_pending_beacons, list) { 163009d989d1SLuis R. Rodriguez list_del(®_beacon->list); 163109d989d1SLuis R. Rodriguez kfree(reg_beacon); 163209d989d1SLuis R. Rodriguez } 163309d989d1SLuis R. Rodriguez } 163409d989d1SLuis R. Rodriguez spin_unlock_bh(®_pending_beacons_lock); 163509d989d1SLuis R. Rodriguez 163609d989d1SLuis R. Rodriguez if (!list_empty(®_beacon_list)) { 163709d989d1SLuis R. Rodriguez list_for_each_entry_safe(reg_beacon, btmp, 163809d989d1SLuis R. Rodriguez ®_beacon_list, list) { 163909d989d1SLuis R. Rodriguez list_del(®_beacon->list); 164009d989d1SLuis R. Rodriguez kfree(reg_beacon); 164109d989d1SLuis R. Rodriguez } 164209d989d1SLuis R. Rodriguez } 164309d989d1SLuis R. Rodriguez 164409d989d1SLuis R. Rodriguez /* First restore to the basic regulatory settings */ 164509d989d1SLuis R. Rodriguez cfg80211_regdomain = cfg80211_world_regdom; 164609d989d1SLuis R. Rodriguez 164709d989d1SLuis R. Rodriguez mutex_unlock(®_mutex); 164809d989d1SLuis R. Rodriguez mutex_unlock(&cfg80211_mutex); 164909d989d1SLuis R. Rodriguez 165009d989d1SLuis R. Rodriguez regulatory_hint_core(cfg80211_regdomain->alpha2); 165109d989d1SLuis R. Rodriguez 165209d989d1SLuis R. Rodriguez /* 165309d989d1SLuis R. Rodriguez * This restores the ieee80211_regdom module parameter 165409d989d1SLuis R. Rodriguez * preference or the last user requested regulatory 165509d989d1SLuis R. Rodriguez * settings, user regulatory settings takes precedence. 165609d989d1SLuis R. Rodriguez */ 165709d989d1SLuis R. Rodriguez if (is_an_alpha2(alpha2)) 165809d989d1SLuis R. Rodriguez regulatory_hint_user(user_alpha2); 165909d989d1SLuis R. Rodriguez } 166009d989d1SLuis R. Rodriguez 166109d989d1SLuis R. Rodriguez 166209d989d1SLuis R. Rodriguez void regulatory_hint_disconnect(void) 166309d989d1SLuis R. Rodriguez { 166409d989d1SLuis R. Rodriguez REG_DBG_PRINT("cfg80211: All devices are disconnected, going to " 166509d989d1SLuis R. Rodriguez "restore regulatory settings\n"); 166609d989d1SLuis R. Rodriguez restore_regulatory_settings(false); 166709d989d1SLuis R. Rodriguez } 166809d989d1SLuis R. Rodriguez 1669e38f8a7aSLuis R. Rodriguez static bool freq_is_chan_12_13_14(u16 freq) 1670e38f8a7aSLuis R. Rodriguez { 1671e38f8a7aSLuis R. Rodriguez if (freq == ieee80211_channel_to_frequency(12) || 1672e38f8a7aSLuis R. Rodriguez freq == ieee80211_channel_to_frequency(13) || 1673e38f8a7aSLuis R. Rodriguez freq == ieee80211_channel_to_frequency(14)) 1674e38f8a7aSLuis R. Rodriguez return true; 1675e38f8a7aSLuis R. Rodriguez return false; 1676e38f8a7aSLuis R. Rodriguez } 1677e38f8a7aSLuis R. Rodriguez 1678e38f8a7aSLuis R. Rodriguez int regulatory_hint_found_beacon(struct wiphy *wiphy, 1679e38f8a7aSLuis R. Rodriguez struct ieee80211_channel *beacon_chan, 1680e38f8a7aSLuis R. Rodriguez gfp_t gfp) 1681e38f8a7aSLuis R. Rodriguez { 1682e38f8a7aSLuis R. Rodriguez struct reg_beacon *reg_beacon; 1683e38f8a7aSLuis R. Rodriguez 1684e38f8a7aSLuis R. Rodriguez if (likely((beacon_chan->beacon_found || 1685e38f8a7aSLuis R. Rodriguez (beacon_chan->flags & IEEE80211_CHAN_RADAR) || 1686e38f8a7aSLuis R. Rodriguez (beacon_chan->band == IEEE80211_BAND_2GHZ && 1687e38f8a7aSLuis R. Rodriguez !freq_is_chan_12_13_14(beacon_chan->center_freq))))) 1688e38f8a7aSLuis R. Rodriguez return 0; 1689e38f8a7aSLuis R. Rodriguez 1690e38f8a7aSLuis R. Rodriguez reg_beacon = kzalloc(sizeof(struct reg_beacon), gfp); 1691e38f8a7aSLuis R. Rodriguez if (!reg_beacon) 1692e38f8a7aSLuis R. Rodriguez return -ENOMEM; 1693e38f8a7aSLuis R. Rodriguez 16944113f751SLuis R. Rodriguez REG_DBG_PRINT("cfg80211: Found new beacon on " 1695e38f8a7aSLuis R. Rodriguez "frequency: %d MHz (Ch %d) on %s\n", 1696e38f8a7aSLuis R. Rodriguez beacon_chan->center_freq, 1697e38f8a7aSLuis R. Rodriguez ieee80211_frequency_to_channel(beacon_chan->center_freq), 1698e38f8a7aSLuis R. Rodriguez wiphy_name(wiphy)); 16994113f751SLuis R. Rodriguez 1700e38f8a7aSLuis R. Rodriguez memcpy(®_beacon->chan, beacon_chan, 1701e38f8a7aSLuis R. Rodriguez sizeof(struct ieee80211_channel)); 1702e38f8a7aSLuis R. Rodriguez 1703e38f8a7aSLuis R. Rodriguez 1704e38f8a7aSLuis R. Rodriguez /* 1705e38f8a7aSLuis R. Rodriguez * Since we can be called from BH or and non-BH context 1706e38f8a7aSLuis R. Rodriguez * we must use spin_lock_bh() 1707e38f8a7aSLuis R. Rodriguez */ 1708e38f8a7aSLuis R. Rodriguez spin_lock_bh(®_pending_beacons_lock); 1709e38f8a7aSLuis R. Rodriguez list_add_tail(®_beacon->list, ®_pending_beacons); 1710e38f8a7aSLuis R. Rodriguez spin_unlock_bh(®_pending_beacons_lock); 1711e38f8a7aSLuis R. Rodriguez 1712e38f8a7aSLuis R. Rodriguez schedule_work(®_work); 1713e38f8a7aSLuis R. Rodriguez 1714e38f8a7aSLuis R. Rodriguez return 0; 1715e38f8a7aSLuis R. Rodriguez } 1716e38f8a7aSLuis R. Rodriguez 1717a3d2eaf0SJohannes Berg static void print_rd_rules(const struct ieee80211_regdomain *rd) 1718b2e1b302SLuis R. Rodriguez { 1719b2e1b302SLuis R. Rodriguez unsigned int i; 1720a3d2eaf0SJohannes Berg const struct ieee80211_reg_rule *reg_rule = NULL; 1721a3d2eaf0SJohannes Berg const struct ieee80211_freq_range *freq_range = NULL; 1722a3d2eaf0SJohannes Berg const struct ieee80211_power_rule *power_rule = NULL; 1723b2e1b302SLuis R. Rodriguez 1724269ac5fdSKalle Valo printk(KERN_INFO " (start_freq - end_freq @ bandwidth), " 1725b2e1b302SLuis R. Rodriguez "(max_antenna_gain, max_eirp)\n"); 1726b2e1b302SLuis R. Rodriguez 1727b2e1b302SLuis R. Rodriguez for (i = 0; i < rd->n_reg_rules; i++) { 1728b2e1b302SLuis R. Rodriguez reg_rule = &rd->reg_rules[i]; 1729b2e1b302SLuis R. Rodriguez freq_range = ®_rule->freq_range; 1730b2e1b302SLuis R. Rodriguez power_rule = ®_rule->power_rule; 1731b2e1b302SLuis R. Rodriguez 1732fb1fc7adSLuis R. Rodriguez /* 1733fb1fc7adSLuis R. Rodriguez * There may not be documentation for max antenna gain 1734fb1fc7adSLuis R. Rodriguez * in certain regions 1735fb1fc7adSLuis R. Rodriguez */ 1736b2e1b302SLuis R. Rodriguez if (power_rule->max_antenna_gain) 1737269ac5fdSKalle Valo printk(KERN_INFO " (%d KHz - %d KHz @ %d KHz), " 1738b2e1b302SLuis R. Rodriguez "(%d mBi, %d mBm)\n", 1739b2e1b302SLuis R. Rodriguez freq_range->start_freq_khz, 1740b2e1b302SLuis R. Rodriguez freq_range->end_freq_khz, 1741b2e1b302SLuis R. Rodriguez freq_range->max_bandwidth_khz, 1742b2e1b302SLuis R. Rodriguez power_rule->max_antenna_gain, 1743b2e1b302SLuis R. Rodriguez power_rule->max_eirp); 1744b2e1b302SLuis R. Rodriguez else 1745269ac5fdSKalle Valo printk(KERN_INFO " (%d KHz - %d KHz @ %d KHz), " 1746b2e1b302SLuis R. Rodriguez "(N/A, %d mBm)\n", 1747b2e1b302SLuis R. Rodriguez freq_range->start_freq_khz, 1748b2e1b302SLuis R. Rodriguez freq_range->end_freq_khz, 1749b2e1b302SLuis R. Rodriguez freq_range->max_bandwidth_khz, 1750b2e1b302SLuis R. Rodriguez power_rule->max_eirp); 1751b2e1b302SLuis R. Rodriguez } 1752b2e1b302SLuis R. Rodriguez } 1753b2e1b302SLuis R. Rodriguez 1754a3d2eaf0SJohannes Berg static void print_regdomain(const struct ieee80211_regdomain *rd) 1755b2e1b302SLuis R. Rodriguez { 1756b2e1b302SLuis R. Rodriguez 17573f2355cbSLuis R. Rodriguez if (is_intersected_alpha2(rd->alpha2)) { 17583f2355cbSLuis R. Rodriguez 17597db90f4aSLuis R. Rodriguez if (last_request->initiator == 17607db90f4aSLuis R. Rodriguez NL80211_REGDOM_SET_BY_COUNTRY_IE) { 176179c97e97SJohannes Berg struct cfg80211_registered_device *rdev; 176279c97e97SJohannes Berg rdev = cfg80211_rdev_by_wiphy_idx( 1763806a9e39SLuis R. Rodriguez last_request->wiphy_idx); 176479c97e97SJohannes Berg if (rdev) { 17653f2355cbSLuis R. Rodriguez printk(KERN_INFO "cfg80211: Current regulatory " 17663f2355cbSLuis R. Rodriguez "domain updated by AP to: %c%c\n", 176779c97e97SJohannes Berg rdev->country_ie_alpha2[0], 176879c97e97SJohannes Berg rdev->country_ie_alpha2[1]); 17693f2355cbSLuis R. Rodriguez } else 17703f2355cbSLuis R. Rodriguez printk(KERN_INFO "cfg80211: Current regulatory " 17713f2355cbSLuis R. Rodriguez "domain intersected:\n"); 17723f2355cbSLuis R. Rodriguez } else 17733f2355cbSLuis R. Rodriguez printk(KERN_INFO "cfg80211: Current regulatory " 1774039498c6SLuis R. Rodriguez "domain intersected:\n"); 17753f2355cbSLuis R. Rodriguez } else if (is_world_regdom(rd->alpha2)) 1776b2e1b302SLuis R. Rodriguez printk(KERN_INFO "cfg80211: World regulatory " 1777b2e1b302SLuis R. Rodriguez "domain updated:\n"); 1778b2e1b302SLuis R. Rodriguez else { 1779b2e1b302SLuis R. Rodriguez if (is_unknown_alpha2(rd->alpha2)) 1780b2e1b302SLuis R. Rodriguez printk(KERN_INFO "cfg80211: Regulatory domain " 1781b2e1b302SLuis R. Rodriguez "changed to driver built-in settings " 1782b2e1b302SLuis R. Rodriguez "(unknown country)\n"); 1783b2e1b302SLuis R. Rodriguez else 1784b2e1b302SLuis R. Rodriguez printk(KERN_INFO "cfg80211: Regulatory domain " 1785b2e1b302SLuis R. Rodriguez "changed to country: %c%c\n", 1786b2e1b302SLuis R. Rodriguez rd->alpha2[0], rd->alpha2[1]); 1787b2e1b302SLuis R. Rodriguez } 1788b2e1b302SLuis R. Rodriguez print_rd_rules(rd); 1789b2e1b302SLuis R. Rodriguez } 1790b2e1b302SLuis R. Rodriguez 17912df78167SJohannes Berg static void print_regdomain_info(const struct ieee80211_regdomain *rd) 1792b2e1b302SLuis R. Rodriguez { 1793b2e1b302SLuis R. Rodriguez printk(KERN_INFO "cfg80211: Regulatory domain: %c%c\n", 1794b2e1b302SLuis R. Rodriguez rd->alpha2[0], rd->alpha2[1]); 1795b2e1b302SLuis R. Rodriguez print_rd_rules(rd); 1796b2e1b302SLuis R. Rodriguez } 1797b2e1b302SLuis R. Rodriguez 1798d2372b31SJohannes Berg /* Takes ownership of rd only if it doesn't fail */ 1799a3d2eaf0SJohannes Berg static int __set_regdom(const struct ieee80211_regdomain *rd) 1800b2e1b302SLuis R. Rodriguez { 18019c96477dSLuis R. Rodriguez const struct ieee80211_regdomain *intersected_rd = NULL; 180279c97e97SJohannes Berg struct cfg80211_registered_device *rdev = NULL; 1803806a9e39SLuis R. Rodriguez struct wiphy *request_wiphy; 1804b2e1b302SLuis R. Rodriguez /* Some basic sanity checks first */ 1805b2e1b302SLuis R. Rodriguez 1806b2e1b302SLuis R. Rodriguez if (is_world_regdom(rd->alpha2)) { 1807f6037d09SJohannes Berg if (WARN_ON(!reg_is_valid_request(rd->alpha2))) 1808b2e1b302SLuis R. Rodriguez return -EINVAL; 1809b2e1b302SLuis R. Rodriguez update_world_regdomain(rd); 1810b2e1b302SLuis R. Rodriguez return 0; 1811b2e1b302SLuis R. Rodriguez } 1812b2e1b302SLuis R. Rodriguez 1813b2e1b302SLuis R. Rodriguez if (!is_alpha2_set(rd->alpha2) && !is_an_alpha2(rd->alpha2) && 1814b2e1b302SLuis R. Rodriguez !is_unknown_alpha2(rd->alpha2)) 1815b2e1b302SLuis R. Rodriguez return -EINVAL; 1816b2e1b302SLuis R. Rodriguez 1817f6037d09SJohannes Berg if (!last_request) 1818b2e1b302SLuis R. Rodriguez return -EINVAL; 1819b2e1b302SLuis R. Rodriguez 1820fb1fc7adSLuis R. Rodriguez /* 1821fb1fc7adSLuis R. Rodriguez * Lets only bother proceeding on the same alpha2 if the current 18223f2355cbSLuis R. Rodriguez * rd is non static (it means CRDA was present and was used last) 1823fb1fc7adSLuis R. Rodriguez * and the pending request came in from a country IE 1824fb1fc7adSLuis R. Rodriguez */ 18257db90f4aSLuis R. Rodriguez if (last_request->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE) { 1826fb1fc7adSLuis R. Rodriguez /* 1827fb1fc7adSLuis R. Rodriguez * If someone else asked us to change the rd lets only bother 1828fb1fc7adSLuis R. Rodriguez * checking if the alpha2 changes if CRDA was already called 1829fb1fc7adSLuis R. Rodriguez */ 1830baeb66feSJohn W. Linville if (!regdom_changes(rd->alpha2)) 1831b2e1b302SLuis R. Rodriguez return -EINVAL; 18323f2355cbSLuis R. Rodriguez } 18333f2355cbSLuis R. Rodriguez 1834fb1fc7adSLuis R. Rodriguez /* 1835fb1fc7adSLuis R. Rodriguez * Now lets set the regulatory domain, update all driver channels 1836b2e1b302SLuis R. Rodriguez * and finally inform them of what we have done, in case they want 1837b2e1b302SLuis R. Rodriguez * to review or adjust their own settings based on their own 1838fb1fc7adSLuis R. Rodriguez * internal EEPROM data 1839fb1fc7adSLuis R. Rodriguez */ 1840b2e1b302SLuis R. Rodriguez 1841f6037d09SJohannes Berg if (WARN_ON(!reg_is_valid_request(rd->alpha2))) 1842b2e1b302SLuis R. Rodriguez return -EINVAL; 1843b2e1b302SLuis R. Rodriguez 1844b2e1b302SLuis R. Rodriguez if (!is_valid_rd(rd)) { 1845b2e1b302SLuis R. Rodriguez printk(KERN_ERR "cfg80211: Invalid " 1846b2e1b302SLuis R. Rodriguez "regulatory domain detected:\n"); 1847b2e1b302SLuis R. Rodriguez print_regdomain_info(rd); 1848b2e1b302SLuis R. Rodriguez return -EINVAL; 1849b2e1b302SLuis R. Rodriguez } 1850b2e1b302SLuis R. Rodriguez 1851806a9e39SLuis R. Rodriguez request_wiphy = wiphy_idx_to_wiphy(last_request->wiphy_idx); 1852806a9e39SLuis R. Rodriguez 1853b8295acdSLuis R. Rodriguez if (!last_request->intersect) { 18543e0c3ff3SLuis R. Rodriguez int r; 18553e0c3ff3SLuis R. Rodriguez 18567db90f4aSLuis R. Rodriguez if (last_request->initiator != NL80211_REGDOM_SET_BY_DRIVER) { 18573e0c3ff3SLuis R. Rodriguez reset_regdomains(); 18583e0c3ff3SLuis R. Rodriguez cfg80211_regdomain = rd; 18593e0c3ff3SLuis R. Rodriguez return 0; 18603e0c3ff3SLuis R. Rodriguez } 18613e0c3ff3SLuis R. Rodriguez 1862fb1fc7adSLuis R. Rodriguez /* 1863fb1fc7adSLuis R. Rodriguez * For a driver hint, lets copy the regulatory domain the 1864fb1fc7adSLuis R. Rodriguez * driver wanted to the wiphy to deal with conflicts 1865fb1fc7adSLuis R. Rodriguez */ 18663e0c3ff3SLuis R. Rodriguez 1867558f6d32SLuis R. Rodriguez /* 1868558f6d32SLuis R. Rodriguez * Userspace could have sent two replies with only 1869558f6d32SLuis R. Rodriguez * one kernel request. 1870558f6d32SLuis R. Rodriguez */ 1871558f6d32SLuis R. Rodriguez if (request_wiphy->regd) 1872558f6d32SLuis R. Rodriguez return -EALREADY; 18733e0c3ff3SLuis R. Rodriguez 1874806a9e39SLuis R. Rodriguez r = reg_copy_regd(&request_wiphy->regd, rd); 18753e0c3ff3SLuis R. Rodriguez if (r) 18763e0c3ff3SLuis R. Rodriguez return r; 18773e0c3ff3SLuis R. Rodriguez 1878b8295acdSLuis R. Rodriguez reset_regdomains(); 1879b8295acdSLuis R. Rodriguez cfg80211_regdomain = rd; 1880b8295acdSLuis R. Rodriguez return 0; 1881b8295acdSLuis R. Rodriguez } 1882b8295acdSLuis R. Rodriguez 1883b8295acdSLuis R. Rodriguez /* Intersection requires a bit more work */ 1884b8295acdSLuis R. Rodriguez 18857db90f4aSLuis R. Rodriguez if (last_request->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE) { 1886b8295acdSLuis R. Rodriguez 18879c96477dSLuis R. Rodriguez intersected_rd = regdom_intersect(rd, cfg80211_regdomain); 18889c96477dSLuis R. Rodriguez if (!intersected_rd) 18899c96477dSLuis R. Rodriguez return -EINVAL; 1890b8295acdSLuis R. Rodriguez 1891fb1fc7adSLuis R. Rodriguez /* 1892fb1fc7adSLuis R. Rodriguez * We can trash what CRDA provided now. 18933e0c3ff3SLuis R. Rodriguez * However if a driver requested this specific regulatory 1894fb1fc7adSLuis R. Rodriguez * domain we keep it for its private use 1895fb1fc7adSLuis R. Rodriguez */ 18967db90f4aSLuis R. Rodriguez if (last_request->initiator == NL80211_REGDOM_SET_BY_DRIVER) 1897806a9e39SLuis R. Rodriguez request_wiphy->regd = rd; 18983e0c3ff3SLuis R. Rodriguez else 18999c96477dSLuis R. Rodriguez kfree(rd); 19003e0c3ff3SLuis R. Rodriguez 1901b8295acdSLuis R. Rodriguez rd = NULL; 1902b8295acdSLuis R. Rodriguez 1903b8295acdSLuis R. Rodriguez reset_regdomains(); 1904b8295acdSLuis R. Rodriguez cfg80211_regdomain = intersected_rd; 1905b8295acdSLuis R. Rodriguez 1906b8295acdSLuis R. Rodriguez return 0; 19079c96477dSLuis R. Rodriguez } 19089c96477dSLuis R. Rodriguez 19093f2355cbSLuis R. Rodriguez if (!intersected_rd) 19103f2355cbSLuis R. Rodriguez return -EINVAL; 19113f2355cbSLuis R. Rodriguez 191279c97e97SJohannes Berg rdev = wiphy_to_dev(request_wiphy); 19133f2355cbSLuis R. Rodriguez 191479c97e97SJohannes Berg rdev->country_ie_alpha2[0] = rd->alpha2[0]; 191579c97e97SJohannes Berg rdev->country_ie_alpha2[1] = rd->alpha2[1]; 191679c97e97SJohannes Berg rdev->env = last_request->country_ie_env; 19173f2355cbSLuis R. Rodriguez 19183f2355cbSLuis R. Rodriguez BUG_ON(intersected_rd == rd); 19193f2355cbSLuis R. Rodriguez 19203f2355cbSLuis R. Rodriguez kfree(rd); 19213f2355cbSLuis R. Rodriguez rd = NULL; 19223f2355cbSLuis R. Rodriguez 1923b8295acdSLuis R. Rodriguez reset_regdomains(); 19243f2355cbSLuis R. Rodriguez cfg80211_regdomain = intersected_rd; 1925b2e1b302SLuis R. Rodriguez 1926b2e1b302SLuis R. Rodriguez return 0; 1927b2e1b302SLuis R. Rodriguez } 1928b2e1b302SLuis R. Rodriguez 1929b2e1b302SLuis R. Rodriguez 1930fb1fc7adSLuis R. Rodriguez /* 1931fb1fc7adSLuis R. Rodriguez * Use this call to set the current regulatory domain. Conflicts with 1932b2e1b302SLuis R. Rodriguez * multiple drivers can be ironed out later. Caller must've already 1933fb1fc7adSLuis R. Rodriguez * kmalloc'd the rd structure. Caller must hold cfg80211_mutex 1934fb1fc7adSLuis R. Rodriguez */ 1935a3d2eaf0SJohannes Berg int set_regdom(const struct ieee80211_regdomain *rd) 1936b2e1b302SLuis R. Rodriguez { 1937b2e1b302SLuis R. Rodriguez int r; 1938b2e1b302SLuis R. Rodriguez 1939761cf7ecSLuis R. Rodriguez assert_cfg80211_lock(); 1940761cf7ecSLuis R. Rodriguez 1941abc7381bSLuis R. Rodriguez mutex_lock(®_mutex); 1942abc7381bSLuis R. Rodriguez 1943b2e1b302SLuis R. Rodriguez /* Note that this doesn't update the wiphys, this is done below */ 1944b2e1b302SLuis R. Rodriguez r = __set_regdom(rd); 1945d2372b31SJohannes Berg if (r) { 1946d2372b31SJohannes Berg kfree(rd); 1947abc7381bSLuis R. Rodriguez mutex_unlock(®_mutex); 1948b2e1b302SLuis R. Rodriguez return r; 1949d2372b31SJohannes Berg } 1950b2e1b302SLuis R. Rodriguez 1951b2e1b302SLuis R. Rodriguez /* This would make this whole thing pointless */ 1952a01ddafdSLuis R. Rodriguez if (!last_request->intersect) 1953b2e1b302SLuis R. Rodriguez BUG_ON(rd != cfg80211_regdomain); 1954b2e1b302SLuis R. Rodriguez 1955b2e1b302SLuis R. Rodriguez /* update all wiphys now with the new established regulatory domain */ 1956f6037d09SJohannes Berg update_all_wiphy_regulatory(last_request->initiator); 1957b2e1b302SLuis R. Rodriguez 1958a01ddafdSLuis R. Rodriguez print_regdomain(cfg80211_regdomain); 1959b2e1b302SLuis R. Rodriguez 196073d54c9eSLuis R. Rodriguez nl80211_send_reg_change_event(last_request); 196173d54c9eSLuis R. Rodriguez 1962abc7381bSLuis R. Rodriguez mutex_unlock(®_mutex); 1963abc7381bSLuis R. Rodriguez 1964b2e1b302SLuis R. Rodriguez return r; 1965b2e1b302SLuis R. Rodriguez } 1966b2e1b302SLuis R. Rodriguez 1967a1794390SLuis R. Rodriguez /* Caller must hold cfg80211_mutex */ 19683f2355cbSLuis R. Rodriguez void reg_device_remove(struct wiphy *wiphy) 19693f2355cbSLuis R. Rodriguez { 19700ad8acafSLuis R. Rodriguez struct wiphy *request_wiphy = NULL; 1971806a9e39SLuis R. Rodriguez 1972761cf7ecSLuis R. Rodriguez assert_cfg80211_lock(); 1973761cf7ecSLuis R. Rodriguez 1974abc7381bSLuis R. Rodriguez mutex_lock(®_mutex); 1975abc7381bSLuis R. Rodriguez 19760ef9ccddSChris Wright kfree(wiphy->regd); 19770ef9ccddSChris Wright 19780ad8acafSLuis R. Rodriguez if (last_request) 1979806a9e39SLuis R. Rodriguez request_wiphy = wiphy_idx_to_wiphy(last_request->wiphy_idx); 1980806a9e39SLuis R. Rodriguez 19810ef9ccddSChris Wright if (!request_wiphy || request_wiphy != wiphy) 1982abc7381bSLuis R. Rodriguez goto out; 19830ef9ccddSChris Wright 1984806a9e39SLuis R. Rodriguez last_request->wiphy_idx = WIPHY_IDX_STALE; 19853f2355cbSLuis R. Rodriguez last_request->country_ie_env = ENVIRON_ANY; 1986abc7381bSLuis R. Rodriguez out: 1987abc7381bSLuis R. Rodriguez mutex_unlock(®_mutex); 19883f2355cbSLuis R. Rodriguez } 19893f2355cbSLuis R. Rodriguez 19902fcc9f73SUwe Kleine-König int __init regulatory_init(void) 1991b2e1b302SLuis R. Rodriguez { 1992bcf4f99bSLuis R. Rodriguez int err = 0; 1993734366deSJohannes Berg 1994b2e1b302SLuis R. Rodriguez reg_pdev = platform_device_register_simple("regulatory", 0, NULL, 0); 1995b2e1b302SLuis R. Rodriguez if (IS_ERR(reg_pdev)) 1996b2e1b302SLuis R. Rodriguez return PTR_ERR(reg_pdev); 1997734366deSJohannes Berg 1998fe33eb39SLuis R. Rodriguez spin_lock_init(®_requests_lock); 1999e38f8a7aSLuis R. Rodriguez spin_lock_init(®_pending_beacons_lock); 2000fe33eb39SLuis R. Rodriguez 2001a3d2eaf0SJohannes Berg cfg80211_regdomain = cfg80211_world_regdom; 2002734366deSJohannes Berg 200309d989d1SLuis R. Rodriguez user_alpha2[0] = '9'; 200409d989d1SLuis R. Rodriguez user_alpha2[1] = '7'; 200509d989d1SLuis R. Rodriguez 2006ae9e4b0dSLuis R. Rodriguez /* We always try to get an update for the static regdomain */ 2007ae9e4b0dSLuis R. Rodriguez err = regulatory_hint_core(cfg80211_regdomain->alpha2); 2008bcf4f99bSLuis R. Rodriguez if (err) { 2009bcf4f99bSLuis R. Rodriguez if (err == -ENOMEM) 2010bcf4f99bSLuis R. Rodriguez return err; 2011bcf4f99bSLuis R. Rodriguez /* 2012bcf4f99bSLuis R. Rodriguez * N.B. kobject_uevent_env() can fail mainly for when we're out 2013bcf4f99bSLuis R. Rodriguez * memory which is handled and propagated appropriately above 2014bcf4f99bSLuis R. Rodriguez * but it can also fail during a netlink_broadcast() or during 2015bcf4f99bSLuis R. Rodriguez * early boot for call_usermodehelper(). For now treat these 2016bcf4f99bSLuis R. Rodriguez * errors as non-fatal. 2017bcf4f99bSLuis R. Rodriguez */ 2018bcf4f99bSLuis R. Rodriguez printk(KERN_ERR "cfg80211: kobject_uevent_env() was unable " 2019bcf4f99bSLuis R. Rodriguez "to call CRDA during init"); 2020bcf4f99bSLuis R. Rodriguez #ifdef CONFIG_CFG80211_REG_DEBUG 2021bcf4f99bSLuis R. Rodriguez /* We want to find out exactly why when debugging */ 2022bcf4f99bSLuis R. Rodriguez WARN_ON(err); 2023bcf4f99bSLuis R. Rodriguez #endif 2024bcf4f99bSLuis R. Rodriguez } 2025734366deSJohannes Berg 2026ae9e4b0dSLuis R. Rodriguez /* 2027ae9e4b0dSLuis R. Rodriguez * Finally, if the user set the module parameter treat it 2028ae9e4b0dSLuis R. Rodriguez * as a user hint. 2029ae9e4b0dSLuis R. Rodriguez */ 2030ae9e4b0dSLuis R. Rodriguez if (!is_world_regdom(ieee80211_regdom)) 2031ae9e4b0dSLuis R. Rodriguez regulatory_hint_user(ieee80211_regdom); 2032ae9e4b0dSLuis R. Rodriguez 2033b2e1b302SLuis R. Rodriguez return 0; 2034b2e1b302SLuis R. Rodriguez } 2035b2e1b302SLuis R. Rodriguez 20362fcc9f73SUwe Kleine-König void /* __init_or_exit */ regulatory_exit(void) 2037b2e1b302SLuis R. Rodriguez { 2038fe33eb39SLuis R. Rodriguez struct regulatory_request *reg_request, *tmp; 2039e38f8a7aSLuis R. Rodriguez struct reg_beacon *reg_beacon, *btmp; 2040fe33eb39SLuis R. Rodriguez 2041fe33eb39SLuis R. Rodriguez cancel_work_sync(®_work); 2042fe33eb39SLuis R. Rodriguez 2043a1794390SLuis R. Rodriguez mutex_lock(&cfg80211_mutex); 2044abc7381bSLuis R. Rodriguez mutex_lock(®_mutex); 2045734366deSJohannes Berg 2046b2e1b302SLuis R. Rodriguez reset_regdomains(); 2047734366deSJohannes Berg 2048f6037d09SJohannes Berg kfree(last_request); 2049f6037d09SJohannes Berg 2050b2e1b302SLuis R. Rodriguez platform_device_unregister(reg_pdev); 2051734366deSJohannes Berg 2052e38f8a7aSLuis R. Rodriguez spin_lock_bh(®_pending_beacons_lock); 2053e38f8a7aSLuis R. Rodriguez if (!list_empty(®_pending_beacons)) { 2054e38f8a7aSLuis R. Rodriguez list_for_each_entry_safe(reg_beacon, btmp, 2055e38f8a7aSLuis R. Rodriguez ®_pending_beacons, list) { 2056e38f8a7aSLuis R. Rodriguez list_del(®_beacon->list); 2057e38f8a7aSLuis R. Rodriguez kfree(reg_beacon); 2058e38f8a7aSLuis R. Rodriguez } 2059e38f8a7aSLuis R. Rodriguez } 2060e38f8a7aSLuis R. Rodriguez spin_unlock_bh(®_pending_beacons_lock); 2061e38f8a7aSLuis R. Rodriguez 2062e38f8a7aSLuis R. Rodriguez if (!list_empty(®_beacon_list)) { 2063e38f8a7aSLuis R. Rodriguez list_for_each_entry_safe(reg_beacon, btmp, 2064e38f8a7aSLuis R. Rodriguez ®_beacon_list, list) { 2065e38f8a7aSLuis R. Rodriguez list_del(®_beacon->list); 2066e38f8a7aSLuis R. Rodriguez kfree(reg_beacon); 2067e38f8a7aSLuis R. Rodriguez } 2068e38f8a7aSLuis R. Rodriguez } 2069e38f8a7aSLuis R. Rodriguez 2070fe33eb39SLuis R. Rodriguez spin_lock(®_requests_lock); 2071fe33eb39SLuis R. Rodriguez if (!list_empty(®_requests_list)) { 2072fe33eb39SLuis R. Rodriguez list_for_each_entry_safe(reg_request, tmp, 2073fe33eb39SLuis R. Rodriguez ®_requests_list, list) { 2074fe33eb39SLuis R. Rodriguez list_del(®_request->list); 2075fe33eb39SLuis R. Rodriguez kfree(reg_request); 2076fe33eb39SLuis R. Rodriguez } 2077fe33eb39SLuis R. Rodriguez } 2078fe33eb39SLuis R. Rodriguez spin_unlock(®_requests_lock); 2079fe33eb39SLuis R. Rodriguez 2080abc7381bSLuis R. Rodriguez mutex_unlock(®_mutex); 2081a1794390SLuis R. Rodriguez mutex_unlock(&cfg80211_mutex); 20828318d78aSJohannes Berg } 2083