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> 36b2e1b302SLuis R. Rodriguez #include <linux/list.h> 37b2e1b302SLuis R. Rodriguez #include <linux/random.h> 38b2e1b302SLuis R. Rodriguez #include <linux/nl80211.h> 39b2e1b302SLuis R. Rodriguez #include <linux/platform_device.h> 40b2e1b302SLuis R. Rodriguez #include <net/cfg80211.h> 418318d78aSJohannes Berg #include "core.h" 42b2e1b302SLuis R. Rodriguez #include "reg.h" 433b377ea9SJohn W. Linville #include "regdb.h" 4473d54c9eSLuis R. Rodriguez #include "nl80211.h" 458318d78aSJohannes Berg 464113f751SLuis R. Rodriguez #ifdef CONFIG_CFG80211_REG_DEBUG 474113f751SLuis R. Rodriguez #define REG_DBG_PRINT(args...) \ 484113f751SLuis R. Rodriguez do { \ 494113f751SLuis R. Rodriguez printk(KERN_DEBUG args); \ 504113f751SLuis R. Rodriguez } while (0) 514113f751SLuis R. Rodriguez #else 524113f751SLuis R. Rodriguez #define REG_DBG_PRINT(args) 534113f751SLuis R. Rodriguez #endif 544113f751SLuis R. Rodriguez 555166ccd2SLuis R. Rodriguez /* Receipt of information from last regulatory request */ 56f6037d09SJohannes Berg static struct regulatory_request *last_request; 57734366deSJohannes Berg 58b2e1b302SLuis R. Rodriguez /* To trigger userspace events */ 59b2e1b302SLuis R. Rodriguez static struct platform_device *reg_pdev; 608318d78aSJohannes Berg 61fb1fc7adSLuis R. Rodriguez /* 62fb1fc7adSLuis R. Rodriguez * Central wireless core regulatory domains, we only need two, 63734366deSJohannes Berg * the current one and a world regulatory domain in case we have no 64fb1fc7adSLuis R. Rodriguez * information to give us an alpha2 65fb1fc7adSLuis R. Rodriguez */ 66f130347cSLuis R. Rodriguez const struct ieee80211_regdomain *cfg80211_regdomain; 67734366deSJohannes Berg 68fb1fc7adSLuis R. Rodriguez /* 69fb1fc7adSLuis R. Rodriguez * We use this as a place for the rd structure built from the 703f2355cbSLuis R. Rodriguez * last parsed country IE to rest until CRDA gets back to us with 71fb1fc7adSLuis R. Rodriguez * what it thinks should apply for the same country 72fb1fc7adSLuis R. Rodriguez */ 733f2355cbSLuis R. Rodriguez static const struct ieee80211_regdomain *country_ie_regdomain; 743f2355cbSLuis R. Rodriguez 75abc7381bSLuis R. Rodriguez /* 76abc7381bSLuis R. Rodriguez * Protects static reg.c components: 77abc7381bSLuis R. Rodriguez * - cfg80211_world_regdom 78abc7381bSLuis R. Rodriguez * - cfg80211_regdom 79abc7381bSLuis R. Rodriguez * - country_ie_regdomain 80abc7381bSLuis R. Rodriguez * - last_request 81abc7381bSLuis R. Rodriguez */ 82abc7381bSLuis R. Rodriguez DEFINE_MUTEX(reg_mutex); 83abc7381bSLuis R. Rodriguez #define assert_reg_lock() WARN_ON(!mutex_is_locked(®_mutex)) 84abc7381bSLuis R. Rodriguez 85e38f8a7aSLuis R. Rodriguez /* Used to queue up regulatory hints */ 86fe33eb39SLuis R. Rodriguez static LIST_HEAD(reg_requests_list); 87fe33eb39SLuis R. Rodriguez static spinlock_t reg_requests_lock; 88fe33eb39SLuis R. Rodriguez 89e38f8a7aSLuis R. Rodriguez /* Used to queue up beacon hints for review */ 90e38f8a7aSLuis R. Rodriguez static LIST_HEAD(reg_pending_beacons); 91e38f8a7aSLuis R. Rodriguez static spinlock_t reg_pending_beacons_lock; 92e38f8a7aSLuis R. Rodriguez 93e38f8a7aSLuis R. Rodriguez /* Used to keep track of processed beacon hints */ 94e38f8a7aSLuis R. Rodriguez static LIST_HEAD(reg_beacon_list); 95e38f8a7aSLuis R. Rodriguez 96e38f8a7aSLuis R. Rodriguez struct reg_beacon { 97e38f8a7aSLuis R. Rodriguez struct list_head list; 98e38f8a7aSLuis R. Rodriguez struct ieee80211_channel chan; 99e38f8a7aSLuis R. Rodriguez }; 100e38f8a7aSLuis R. Rodriguez 101734366deSJohannes Berg /* We keep a static world regulatory domain in case of the absence of CRDA */ 102734366deSJohannes Berg static const struct ieee80211_regdomain world_regdom = { 103611b6a82SLuis R. Rodriguez .n_reg_rules = 5, 104734366deSJohannes Berg .alpha2 = "00", 105734366deSJohannes Berg .reg_rules = { 10668798a62SLuis R. Rodriguez /* IEEE 802.11b/g, channels 1..11 */ 10768798a62SLuis R. Rodriguez REG_RULE(2412-10, 2462+10, 40, 6, 20, 0), 108611b6a82SLuis R. Rodriguez /* IEEE 802.11b/g, channels 12..13. No HT40 109611b6a82SLuis R. Rodriguez * channel fits here. */ 110611b6a82SLuis R. Rodriguez REG_RULE(2467-10, 2472+10, 20, 6, 20, 111611b6a82SLuis R. Rodriguez NL80211_RRF_PASSIVE_SCAN | 112611b6a82SLuis R. Rodriguez NL80211_RRF_NO_IBSS), 113611b6a82SLuis R. Rodriguez /* IEEE 802.11 channel 14 - Only JP enables 114611b6a82SLuis R. Rodriguez * this and for 802.11b only */ 115611b6a82SLuis R. Rodriguez REG_RULE(2484-10, 2484+10, 20, 6, 20, 116611b6a82SLuis R. Rodriguez NL80211_RRF_PASSIVE_SCAN | 117611b6a82SLuis R. Rodriguez NL80211_RRF_NO_IBSS | 118611b6a82SLuis R. Rodriguez NL80211_RRF_NO_OFDM), 1193fc71f77SLuis R. Rodriguez /* IEEE 802.11a, channel 36..48 */ 120ec329aceSLuis R. Rodriguez REG_RULE(5180-10, 5240+10, 40, 6, 20, 1213fc71f77SLuis R. Rodriguez NL80211_RRF_PASSIVE_SCAN | 1223fc71f77SLuis R. Rodriguez NL80211_RRF_NO_IBSS), 1233fc71f77SLuis R. Rodriguez 1243fc71f77SLuis R. Rodriguez /* NB: 5260 MHz - 5700 MHz requies DFS */ 1253fc71f77SLuis R. Rodriguez 1263fc71f77SLuis R. Rodriguez /* IEEE 802.11a, channel 149..165 */ 127ec329aceSLuis R. Rodriguez REG_RULE(5745-10, 5825+10, 40, 6, 20, 1283fc71f77SLuis R. Rodriguez NL80211_RRF_PASSIVE_SCAN | 1293fc71f77SLuis R. Rodriguez NL80211_RRF_NO_IBSS), 130734366deSJohannes Berg } 131734366deSJohannes Berg }; 132734366deSJohannes Berg 133a3d2eaf0SJohannes Berg static const struct ieee80211_regdomain *cfg80211_world_regdom = 134a3d2eaf0SJohannes Berg &world_regdom; 135734366deSJohannes Berg 1366ee7d330SLuis R. Rodriguez static char *ieee80211_regdom = "00"; 1376ee7d330SLuis R. Rodriguez 138734366deSJohannes Berg module_param(ieee80211_regdom, charp, 0444); 139734366deSJohannes Berg MODULE_PARM_DESC(ieee80211_regdom, "IEEE 802.11 regulatory domain code"); 140734366deSJohannes Berg 141734366deSJohannes Berg static void reset_regdomains(void) 142734366deSJohannes Berg { 143942b25cfSJohannes Berg /* avoid freeing static information or freeing something twice */ 144942b25cfSJohannes Berg if (cfg80211_regdomain == cfg80211_world_regdom) 145942b25cfSJohannes Berg cfg80211_regdomain = NULL; 146942b25cfSJohannes Berg if (cfg80211_world_regdom == &world_regdom) 147942b25cfSJohannes Berg cfg80211_world_regdom = NULL; 148942b25cfSJohannes Berg if (cfg80211_regdomain == &world_regdom) 149942b25cfSJohannes Berg cfg80211_regdomain = NULL; 150942b25cfSJohannes Berg 151734366deSJohannes Berg kfree(cfg80211_regdomain); 152734366deSJohannes Berg kfree(cfg80211_world_regdom); 153734366deSJohannes Berg 154a3d2eaf0SJohannes Berg cfg80211_world_regdom = &world_regdom; 155734366deSJohannes Berg cfg80211_regdomain = NULL; 156734366deSJohannes Berg } 157734366deSJohannes Berg 158fb1fc7adSLuis R. Rodriguez /* 159fb1fc7adSLuis R. Rodriguez * Dynamic world regulatory domain requested by the wireless 160fb1fc7adSLuis R. Rodriguez * core upon initialization 161fb1fc7adSLuis R. Rodriguez */ 162a3d2eaf0SJohannes Berg static void update_world_regdomain(const struct ieee80211_regdomain *rd) 163734366deSJohannes Berg { 164f6037d09SJohannes Berg BUG_ON(!last_request); 165734366deSJohannes Berg 166734366deSJohannes Berg reset_regdomains(); 167734366deSJohannes Berg 168734366deSJohannes Berg cfg80211_world_regdom = rd; 169734366deSJohannes Berg cfg80211_regdomain = rd; 170734366deSJohannes Berg } 171734366deSJohannes Berg 172a3d2eaf0SJohannes Berg bool is_world_regdom(const char *alpha2) 173b2e1b302SLuis R. Rodriguez { 174b2e1b302SLuis R. Rodriguez if (!alpha2) 175b2e1b302SLuis R. Rodriguez return false; 176b2e1b302SLuis R. Rodriguez if (alpha2[0] == '0' && alpha2[1] == '0') 177b2e1b302SLuis R. Rodriguez return true; 178b2e1b302SLuis R. Rodriguez return false; 179b2e1b302SLuis R. Rodriguez } 180b2e1b302SLuis R. Rodriguez 181a3d2eaf0SJohannes Berg static bool is_alpha2_set(const char *alpha2) 182b2e1b302SLuis R. Rodriguez { 183b2e1b302SLuis R. Rodriguez if (!alpha2) 184b2e1b302SLuis R. Rodriguez return false; 185b2e1b302SLuis R. Rodriguez if (alpha2[0] != 0 && alpha2[1] != 0) 186b2e1b302SLuis R. Rodriguez return true; 187b2e1b302SLuis R. Rodriguez return false; 188b2e1b302SLuis R. Rodriguez } 189b2e1b302SLuis R. Rodriguez 190b2e1b302SLuis R. Rodriguez static bool is_alpha_upper(char letter) 191b2e1b302SLuis R. Rodriguez { 192b2e1b302SLuis R. Rodriguez /* ASCII A - Z */ 193b2e1b302SLuis R. Rodriguez if (letter >= 65 && letter <= 90) 194b2e1b302SLuis R. Rodriguez return true; 195b2e1b302SLuis R. Rodriguez return false; 196b2e1b302SLuis R. Rodriguez } 197b2e1b302SLuis R. Rodriguez 198a3d2eaf0SJohannes Berg static bool is_unknown_alpha2(const char *alpha2) 199b2e1b302SLuis R. Rodriguez { 200b2e1b302SLuis R. Rodriguez if (!alpha2) 201b2e1b302SLuis R. Rodriguez return false; 202fb1fc7adSLuis R. Rodriguez /* 203fb1fc7adSLuis R. Rodriguez * Special case where regulatory domain was built by driver 204fb1fc7adSLuis R. Rodriguez * but a specific alpha2 cannot be determined 205fb1fc7adSLuis R. Rodriguez */ 206b2e1b302SLuis R. Rodriguez if (alpha2[0] == '9' && alpha2[1] == '9') 207b2e1b302SLuis R. Rodriguez return true; 208b2e1b302SLuis R. Rodriguez return false; 209b2e1b302SLuis R. Rodriguez } 210b2e1b302SLuis R. Rodriguez 2113f2355cbSLuis R. Rodriguez static bool is_intersected_alpha2(const char *alpha2) 2123f2355cbSLuis R. Rodriguez { 2133f2355cbSLuis R. Rodriguez if (!alpha2) 2143f2355cbSLuis R. Rodriguez return false; 215fb1fc7adSLuis R. Rodriguez /* 216fb1fc7adSLuis R. Rodriguez * Special case where regulatory domain is the 2173f2355cbSLuis R. Rodriguez * result of an intersection between two regulatory domain 218fb1fc7adSLuis R. Rodriguez * structures 219fb1fc7adSLuis R. Rodriguez */ 2203f2355cbSLuis R. Rodriguez if (alpha2[0] == '9' && alpha2[1] == '8') 2213f2355cbSLuis R. Rodriguez return true; 2223f2355cbSLuis R. Rodriguez return false; 2233f2355cbSLuis R. Rodriguez } 2243f2355cbSLuis R. Rodriguez 225a3d2eaf0SJohannes Berg static bool is_an_alpha2(const char *alpha2) 226b2e1b302SLuis R. Rodriguez { 227b2e1b302SLuis R. Rodriguez if (!alpha2) 228b2e1b302SLuis R. Rodriguez return false; 229b2e1b302SLuis R. Rodriguez if (is_alpha_upper(alpha2[0]) && is_alpha_upper(alpha2[1])) 230b2e1b302SLuis R. Rodriguez return true; 231b2e1b302SLuis R. Rodriguez return false; 232b2e1b302SLuis R. Rodriguez } 233b2e1b302SLuis R. Rodriguez 234a3d2eaf0SJohannes Berg static bool alpha2_equal(const char *alpha2_x, const char *alpha2_y) 235b2e1b302SLuis R. Rodriguez { 236b2e1b302SLuis R. Rodriguez if (!alpha2_x || !alpha2_y) 237b2e1b302SLuis R. Rodriguez return false; 238b2e1b302SLuis R. Rodriguez if (alpha2_x[0] == alpha2_y[0] && 239b2e1b302SLuis R. Rodriguez alpha2_x[1] == alpha2_y[1]) 240b2e1b302SLuis R. Rodriguez return true; 241b2e1b302SLuis R. Rodriguez return false; 242b2e1b302SLuis R. Rodriguez } 243b2e1b302SLuis R. Rodriguez 24469b1572bSLuis R. Rodriguez static bool regdom_changes(const char *alpha2) 245b2e1b302SLuis R. Rodriguez { 246761cf7ecSLuis R. Rodriguez assert_cfg80211_lock(); 247761cf7ecSLuis R. Rodriguez 248b2e1b302SLuis R. Rodriguez if (!cfg80211_regdomain) 249b2e1b302SLuis R. Rodriguez return true; 250b2e1b302SLuis R. Rodriguez if (alpha2_equal(cfg80211_regdomain->alpha2, alpha2)) 251b2e1b302SLuis R. Rodriguez return false; 252b2e1b302SLuis R. Rodriguez return true; 253b2e1b302SLuis R. Rodriguez } 254b2e1b302SLuis R. Rodriguez 2553f2355cbSLuis R. Rodriguez /** 2563f2355cbSLuis R. Rodriguez * country_ie_integrity_changes - tells us if the country IE has changed 2573f2355cbSLuis R. Rodriguez * @checksum: checksum of country IE of fields we are interested in 2583f2355cbSLuis R. Rodriguez * 2593f2355cbSLuis R. Rodriguez * If the country IE has not changed you can ignore it safely. This is 2603f2355cbSLuis R. Rodriguez * useful to determine if two devices are seeing two different country IEs 2613f2355cbSLuis R. Rodriguez * even on the same alpha2. Note that this will return false if no IE has 2623f2355cbSLuis R. Rodriguez * been set on the wireless core yet. 2633f2355cbSLuis R. Rodriguez */ 2643f2355cbSLuis R. Rodriguez static bool country_ie_integrity_changes(u32 checksum) 2653f2355cbSLuis R. Rodriguez { 2663f2355cbSLuis R. Rodriguez /* If no IE has been set then the checksum doesn't change */ 2673f2355cbSLuis R. Rodriguez if (unlikely(!last_request->country_ie_checksum)) 2683f2355cbSLuis R. Rodriguez return false; 2693f2355cbSLuis R. Rodriguez if (unlikely(last_request->country_ie_checksum != checksum)) 2703f2355cbSLuis R. Rodriguez return true; 2713f2355cbSLuis R. Rodriguez return false; 2723f2355cbSLuis R. Rodriguez } 2733f2355cbSLuis R. Rodriguez 2743b377ea9SJohn W. Linville static int reg_copy_regd(const struct ieee80211_regdomain **dst_regd, 2753b377ea9SJohn W. Linville const struct ieee80211_regdomain *src_regd) 2763b377ea9SJohn W. Linville { 2773b377ea9SJohn W. Linville struct ieee80211_regdomain *regd; 2783b377ea9SJohn W. Linville int size_of_regd = 0; 2793b377ea9SJohn W. Linville unsigned int i; 2803b377ea9SJohn W. Linville 2813b377ea9SJohn W. Linville size_of_regd = sizeof(struct ieee80211_regdomain) + 2823b377ea9SJohn W. Linville ((src_regd->n_reg_rules + 1) * sizeof(struct ieee80211_reg_rule)); 2833b377ea9SJohn W. Linville 2843b377ea9SJohn W. Linville regd = kzalloc(size_of_regd, GFP_KERNEL); 2853b377ea9SJohn W. Linville if (!regd) 2863b377ea9SJohn W. Linville return -ENOMEM; 2873b377ea9SJohn W. Linville 2883b377ea9SJohn W. Linville memcpy(regd, src_regd, sizeof(struct ieee80211_regdomain)); 2893b377ea9SJohn W. Linville 2903b377ea9SJohn W. Linville for (i = 0; i < src_regd->n_reg_rules; i++) 2913b377ea9SJohn W. Linville memcpy(®d->reg_rules[i], &src_regd->reg_rules[i], 2923b377ea9SJohn W. Linville sizeof(struct ieee80211_reg_rule)); 2933b377ea9SJohn W. Linville 2943b377ea9SJohn W. Linville *dst_regd = regd; 2953b377ea9SJohn W. Linville return 0; 2963b377ea9SJohn W. Linville } 2973b377ea9SJohn W. Linville 2983b377ea9SJohn W. Linville #ifdef CONFIG_CFG80211_INTERNAL_REGDB 2993b377ea9SJohn W. Linville struct reg_regdb_search_request { 3003b377ea9SJohn W. Linville char alpha2[2]; 3013b377ea9SJohn W. Linville struct list_head list; 3023b377ea9SJohn W. Linville }; 3033b377ea9SJohn W. Linville 3043b377ea9SJohn W. Linville static LIST_HEAD(reg_regdb_search_list); 3053b377ea9SJohn W. Linville static DEFINE_SPINLOCK(reg_regdb_search_lock); 3063b377ea9SJohn W. Linville 3073b377ea9SJohn W. Linville static void reg_regdb_search(struct work_struct *work) 3083b377ea9SJohn W. Linville { 3093b377ea9SJohn W. Linville struct reg_regdb_search_request *request; 3103b377ea9SJohn W. Linville const struct ieee80211_regdomain *curdom, *regdom; 3113b377ea9SJohn W. Linville int i, r; 3123b377ea9SJohn W. Linville 3133b377ea9SJohn W. Linville spin_lock(®_regdb_search_lock); 3143b377ea9SJohn W. Linville while (!list_empty(®_regdb_search_list)) { 3153b377ea9SJohn W. Linville request = list_first_entry(®_regdb_search_list, 3163b377ea9SJohn W. Linville struct reg_regdb_search_request, 3173b377ea9SJohn W. Linville list); 3183b377ea9SJohn W. Linville list_del(&request->list); 3193b377ea9SJohn W. Linville 3203b377ea9SJohn W. Linville for (i=0; i<reg_regdb_size; i++) { 3213b377ea9SJohn W. Linville curdom = reg_regdb[i]; 3223b377ea9SJohn W. Linville 3233b377ea9SJohn W. Linville if (!memcmp(request->alpha2, curdom->alpha2, 2)) { 3243b377ea9SJohn W. Linville r = reg_copy_regd(®dom, curdom); 3253b377ea9SJohn W. Linville if (r) 3263b377ea9SJohn W. Linville break; 3273b377ea9SJohn W. Linville spin_unlock(®_regdb_search_lock); 3283b377ea9SJohn W. Linville mutex_lock(&cfg80211_mutex); 3293b377ea9SJohn W. Linville set_regdom(regdom); 3303b377ea9SJohn W. Linville mutex_unlock(&cfg80211_mutex); 3313b377ea9SJohn W. Linville spin_lock(®_regdb_search_lock); 3323b377ea9SJohn W. Linville break; 3333b377ea9SJohn W. Linville } 3343b377ea9SJohn W. Linville } 3353b377ea9SJohn W. Linville 3363b377ea9SJohn W. Linville kfree(request); 3373b377ea9SJohn W. Linville } 3383b377ea9SJohn W. Linville spin_unlock(®_regdb_search_lock); 3393b377ea9SJohn W. Linville } 3403b377ea9SJohn W. Linville 3413b377ea9SJohn W. Linville static DECLARE_WORK(reg_regdb_work, reg_regdb_search); 3423b377ea9SJohn W. Linville 3433b377ea9SJohn W. Linville static void reg_regdb_query(const char *alpha2) 3443b377ea9SJohn W. Linville { 3453b377ea9SJohn W. Linville struct reg_regdb_search_request *request; 3463b377ea9SJohn W. Linville 3473b377ea9SJohn W. Linville if (!alpha2) 3483b377ea9SJohn W. Linville return; 3493b377ea9SJohn W. Linville 3503b377ea9SJohn W. Linville request = kzalloc(sizeof(struct reg_regdb_search_request), GFP_KERNEL); 3513b377ea9SJohn W. Linville if (!request) 3523b377ea9SJohn W. Linville return; 3533b377ea9SJohn W. Linville 3543b377ea9SJohn W. Linville memcpy(request->alpha2, alpha2, 2); 3553b377ea9SJohn W. Linville 3563b377ea9SJohn W. Linville spin_lock(®_regdb_search_lock); 3573b377ea9SJohn W. Linville list_add_tail(&request->list, ®_regdb_search_list); 3583b377ea9SJohn W. Linville spin_unlock(®_regdb_search_lock); 3593b377ea9SJohn W. Linville 3603b377ea9SJohn W. Linville schedule_work(®_regdb_work); 3613b377ea9SJohn W. Linville } 3623b377ea9SJohn W. Linville #else 3633b377ea9SJohn W. Linville static inline void reg_regdb_query(const char *alpha2) {} 3643b377ea9SJohn W. Linville #endif /* CONFIG_CFG80211_INTERNAL_REGDB */ 3653b377ea9SJohn W. Linville 366fb1fc7adSLuis R. Rodriguez /* 367fb1fc7adSLuis R. Rodriguez * This lets us keep regulatory code which is updated on a regulatory 368fb1fc7adSLuis R. Rodriguez * basis in userspace. 369fb1fc7adSLuis R. Rodriguez */ 370b2e1b302SLuis R. Rodriguez static int call_crda(const char *alpha2) 371b2e1b302SLuis R. Rodriguez { 372b2e1b302SLuis R. Rodriguez char country_env[9 + 2] = "COUNTRY="; 373b2e1b302SLuis R. Rodriguez char *envp[] = { 374b2e1b302SLuis R. Rodriguez country_env, 375b2e1b302SLuis R. Rodriguez NULL 3768318d78aSJohannes Berg }; 3778318d78aSJohannes Berg 378b2e1b302SLuis R. Rodriguez if (!is_world_regdom((char *) alpha2)) 379b2e1b302SLuis R. Rodriguez printk(KERN_INFO "cfg80211: Calling CRDA for country: %c%c\n", 380b2e1b302SLuis R. Rodriguez alpha2[0], alpha2[1]); 381b2e1b302SLuis R. Rodriguez else 382b2e1b302SLuis R. Rodriguez printk(KERN_INFO "cfg80211: Calling CRDA to update world " 383b2e1b302SLuis R. Rodriguez "regulatory domain\n"); 3848318d78aSJohannes Berg 3853b377ea9SJohn W. Linville /* query internal regulatory database (if it exists) */ 3863b377ea9SJohn W. Linville reg_regdb_query(alpha2); 3873b377ea9SJohn W. Linville 388b2e1b302SLuis R. Rodriguez country_env[8] = alpha2[0]; 389b2e1b302SLuis R. Rodriguez country_env[9] = alpha2[1]; 3908318d78aSJohannes Berg 391b2e1b302SLuis R. Rodriguez return kobject_uevent_env(®_pdev->dev.kobj, KOBJ_CHANGE, envp); 392b2e1b302SLuis R. Rodriguez } 393b2e1b302SLuis R. Rodriguez 394b2e1b302SLuis R. Rodriguez /* Used by nl80211 before kmalloc'ing our regulatory domain */ 395a3d2eaf0SJohannes Berg bool reg_is_valid_request(const char *alpha2) 396b2e1b302SLuis R. Rodriguez { 39761405e97SLuis R. Rodriguez assert_cfg80211_lock(); 39861405e97SLuis R. Rodriguez 399f6037d09SJohannes Berg if (!last_request) 400f6037d09SJohannes Berg return false; 401f6037d09SJohannes Berg 402f6037d09SJohannes Berg return alpha2_equal(last_request->alpha2, alpha2); 403b2e1b302SLuis R. Rodriguez } 404b2e1b302SLuis R. Rodriguez 405b2e1b302SLuis R. Rodriguez /* Sanity check on a regulatory rule */ 406a3d2eaf0SJohannes Berg static bool is_valid_reg_rule(const struct ieee80211_reg_rule *rule) 407b2e1b302SLuis R. Rodriguez { 408a3d2eaf0SJohannes Berg const struct ieee80211_freq_range *freq_range = &rule->freq_range; 409b2e1b302SLuis R. Rodriguez u32 freq_diff; 410b2e1b302SLuis R. Rodriguez 41191e99004SLuis R. Rodriguez if (freq_range->start_freq_khz <= 0 || freq_range->end_freq_khz <= 0) 412b2e1b302SLuis R. Rodriguez return false; 413b2e1b302SLuis R. Rodriguez 414b2e1b302SLuis R. Rodriguez if (freq_range->start_freq_khz > freq_range->end_freq_khz) 415b2e1b302SLuis R. Rodriguez return false; 416b2e1b302SLuis R. Rodriguez 417b2e1b302SLuis R. Rodriguez freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz; 418b2e1b302SLuis R. Rodriguez 419bd05f28eSRoel Kluin if (freq_range->end_freq_khz <= freq_range->start_freq_khz || 420bd05f28eSRoel Kluin freq_range->max_bandwidth_khz > freq_diff) 421b2e1b302SLuis R. Rodriguez return false; 422b2e1b302SLuis R. Rodriguez 423b2e1b302SLuis R. Rodriguez return true; 424b2e1b302SLuis R. Rodriguez } 425b2e1b302SLuis R. Rodriguez 426a3d2eaf0SJohannes Berg static bool is_valid_rd(const struct ieee80211_regdomain *rd) 427b2e1b302SLuis R. Rodriguez { 428a3d2eaf0SJohannes Berg const struct ieee80211_reg_rule *reg_rule = NULL; 429b2e1b302SLuis R. Rodriguez unsigned int i; 430b2e1b302SLuis R. Rodriguez 431b2e1b302SLuis R. Rodriguez if (!rd->n_reg_rules) 432b2e1b302SLuis R. Rodriguez return false; 433b2e1b302SLuis R. Rodriguez 43488dc1c3fSLuis R. Rodriguez if (WARN_ON(rd->n_reg_rules > NL80211_MAX_SUPP_REG_RULES)) 43588dc1c3fSLuis R. Rodriguez return false; 43688dc1c3fSLuis R. Rodriguez 437b2e1b302SLuis R. Rodriguez for (i = 0; i < rd->n_reg_rules; i++) { 438b2e1b302SLuis R. Rodriguez reg_rule = &rd->reg_rules[i]; 439b2e1b302SLuis R. Rodriguez if (!is_valid_reg_rule(reg_rule)) 440b2e1b302SLuis R. Rodriguez return false; 441b2e1b302SLuis R. Rodriguez } 442b2e1b302SLuis R. Rodriguez 443b2e1b302SLuis R. Rodriguez return true; 444b2e1b302SLuis R. Rodriguez } 445b2e1b302SLuis R. Rodriguez 446038659e7SLuis R. Rodriguez static bool reg_does_bw_fit(const struct ieee80211_freq_range *freq_range, 447038659e7SLuis R. Rodriguez u32 center_freq_khz, 448038659e7SLuis R. Rodriguez u32 bw_khz) 449b2e1b302SLuis R. Rodriguez { 450038659e7SLuis R. Rodriguez u32 start_freq_khz, end_freq_khz; 451038659e7SLuis R. Rodriguez 452038659e7SLuis R. Rodriguez start_freq_khz = center_freq_khz - (bw_khz/2); 453038659e7SLuis R. Rodriguez end_freq_khz = center_freq_khz + (bw_khz/2); 454038659e7SLuis R. Rodriguez 455b2e1b302SLuis R. Rodriguez if (start_freq_khz >= freq_range->start_freq_khz && 456b2e1b302SLuis R. Rodriguez end_freq_khz <= freq_range->end_freq_khz) 457038659e7SLuis R. Rodriguez return true; 458038659e7SLuis R. Rodriguez 459038659e7SLuis R. Rodriguez return false; 460b2e1b302SLuis R. Rodriguez } 461b2e1b302SLuis R. Rodriguez 4620c7dc45dSLuis R. Rodriguez /** 4630c7dc45dSLuis R. Rodriguez * freq_in_rule_band - tells us if a frequency is in a frequency band 4640c7dc45dSLuis R. Rodriguez * @freq_range: frequency rule we want to query 4650c7dc45dSLuis R. Rodriguez * @freq_khz: frequency we are inquiring about 4660c7dc45dSLuis R. Rodriguez * 4670c7dc45dSLuis R. Rodriguez * This lets us know if a specific frequency rule is or is not relevant to 4680c7dc45dSLuis R. Rodriguez * a specific frequency's band. Bands are device specific and artificial 4690c7dc45dSLuis R. Rodriguez * definitions (the "2.4 GHz band" and the "5 GHz band"), however it is 4700c7dc45dSLuis R. Rodriguez * safe for now to assume that a frequency rule should not be part of a 4710c7dc45dSLuis R. Rodriguez * frequency's band if the start freq or end freq are off by more than 2 GHz. 4720c7dc45dSLuis R. Rodriguez * This resolution can be lowered and should be considered as we add 4730c7dc45dSLuis R. Rodriguez * regulatory rule support for other "bands". 4740c7dc45dSLuis R. Rodriguez **/ 4750c7dc45dSLuis R. Rodriguez static bool freq_in_rule_band(const struct ieee80211_freq_range *freq_range, 4760c7dc45dSLuis R. Rodriguez u32 freq_khz) 4770c7dc45dSLuis R. Rodriguez { 4780c7dc45dSLuis R. Rodriguez #define ONE_GHZ_IN_KHZ 1000000 4790c7dc45dSLuis R. Rodriguez if (abs(freq_khz - freq_range->start_freq_khz) <= (2 * ONE_GHZ_IN_KHZ)) 4800c7dc45dSLuis R. Rodriguez return true; 4810c7dc45dSLuis R. Rodriguez if (abs(freq_khz - freq_range->end_freq_khz) <= (2 * ONE_GHZ_IN_KHZ)) 4820c7dc45dSLuis R. Rodriguez return true; 4830c7dc45dSLuis R. Rodriguez return false; 4840c7dc45dSLuis R. Rodriguez #undef ONE_GHZ_IN_KHZ 4850c7dc45dSLuis R. Rodriguez } 4860c7dc45dSLuis R. Rodriguez 487fb1fc7adSLuis R. Rodriguez /* 488fb1fc7adSLuis R. Rodriguez * Converts a country IE to a regulatory domain. A regulatory domain 4893f2355cbSLuis R. Rodriguez * structure has a lot of information which the IE doesn't yet have, 4903f2355cbSLuis R. Rodriguez * so for the other values we use upper max values as we will intersect 491fb1fc7adSLuis R. Rodriguez * with our userspace regulatory agent to get lower bounds. 492fb1fc7adSLuis R. Rodriguez */ 4933f2355cbSLuis R. Rodriguez static struct ieee80211_regdomain *country_ie_2_rd( 4943f2355cbSLuis R. Rodriguez u8 *country_ie, 4953f2355cbSLuis R. Rodriguez u8 country_ie_len, 4963f2355cbSLuis R. Rodriguez u32 *checksum) 4973f2355cbSLuis R. Rodriguez { 4983f2355cbSLuis R. Rodriguez struct ieee80211_regdomain *rd = NULL; 4993f2355cbSLuis R. Rodriguez unsigned int i = 0; 5003f2355cbSLuis R. Rodriguez char alpha2[2]; 5013f2355cbSLuis R. Rodriguez u32 flags = 0; 5023f2355cbSLuis R. Rodriguez u32 num_rules = 0, size_of_regd = 0; 5033f2355cbSLuis R. Rodriguez u8 *triplets_start = NULL; 5043f2355cbSLuis R. Rodriguez u8 len_at_triplet = 0; 5053f2355cbSLuis R. Rodriguez /* the last channel we have registered in a subband (triplet) */ 5063f2355cbSLuis R. Rodriguez int last_sub_max_channel = 0; 5073f2355cbSLuis R. Rodriguez 5083f2355cbSLuis R. Rodriguez *checksum = 0xDEADBEEF; 5093f2355cbSLuis R. Rodriguez 5103f2355cbSLuis R. Rodriguez /* Country IE requirements */ 5113f2355cbSLuis R. Rodriguez BUG_ON(country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN || 5123f2355cbSLuis R. Rodriguez country_ie_len & 0x01); 5133f2355cbSLuis R. Rodriguez 5143f2355cbSLuis R. Rodriguez alpha2[0] = country_ie[0]; 5153f2355cbSLuis R. Rodriguez alpha2[1] = country_ie[1]; 5163f2355cbSLuis R. Rodriguez 5173f2355cbSLuis R. Rodriguez /* 5183f2355cbSLuis R. Rodriguez * Third octet can be: 5193f2355cbSLuis R. Rodriguez * 'I' - Indoor 5203f2355cbSLuis R. Rodriguez * 'O' - Outdoor 5213f2355cbSLuis R. Rodriguez * 5223f2355cbSLuis R. Rodriguez * anything else we assume is no restrictions 5233f2355cbSLuis R. Rodriguez */ 5243f2355cbSLuis R. Rodriguez if (country_ie[2] == 'I') 5253f2355cbSLuis R. Rodriguez flags = NL80211_RRF_NO_OUTDOOR; 5263f2355cbSLuis R. Rodriguez else if (country_ie[2] == 'O') 5273f2355cbSLuis R. Rodriguez flags = NL80211_RRF_NO_INDOOR; 5283f2355cbSLuis R. Rodriguez 5293f2355cbSLuis R. Rodriguez country_ie += 3; 5303f2355cbSLuis R. Rodriguez country_ie_len -= 3; 5313f2355cbSLuis R. Rodriguez 5323f2355cbSLuis R. Rodriguez triplets_start = country_ie; 5333f2355cbSLuis R. Rodriguez len_at_triplet = country_ie_len; 5343f2355cbSLuis R. Rodriguez 5353f2355cbSLuis R. Rodriguez *checksum ^= ((flags ^ alpha2[0] ^ alpha2[1]) << 8); 5363f2355cbSLuis R. Rodriguez 537fb1fc7adSLuis R. Rodriguez /* 538fb1fc7adSLuis R. Rodriguez * We need to build a reg rule for each triplet, but first we must 5393f2355cbSLuis R. Rodriguez * calculate the number of reg rules we will need. We will need one 540fb1fc7adSLuis R. Rodriguez * for each channel subband 541fb1fc7adSLuis R. Rodriguez */ 5423f2355cbSLuis R. Rodriguez while (country_ie_len >= 3) { 543615aab4bSLuis R. Rodriguez int end_channel = 0; 5443f2355cbSLuis R. Rodriguez struct ieee80211_country_ie_triplet *triplet = 5453f2355cbSLuis R. Rodriguez (struct ieee80211_country_ie_triplet *) country_ie; 5463f2355cbSLuis R. Rodriguez int cur_sub_max_channel = 0, cur_channel = 0; 5473f2355cbSLuis R. Rodriguez 5483f2355cbSLuis R. Rodriguez if (triplet->ext.reg_extension_id >= 5493f2355cbSLuis R. Rodriguez IEEE80211_COUNTRY_EXTENSION_ID) { 5503f2355cbSLuis R. Rodriguez country_ie += 3; 5513f2355cbSLuis R. Rodriguez country_ie_len -= 3; 5523f2355cbSLuis R. Rodriguez continue; 5533f2355cbSLuis R. Rodriguez } 5543f2355cbSLuis R. Rodriguez 555615aab4bSLuis R. Rodriguez /* 2 GHz */ 556615aab4bSLuis R. Rodriguez if (triplet->chans.first_channel <= 14) 557615aab4bSLuis R. Rodriguez end_channel = triplet->chans.first_channel + 558615aab4bSLuis R. Rodriguez triplet->chans.num_channels; 559615aab4bSLuis R. Rodriguez else 560615aab4bSLuis R. Rodriguez /* 561615aab4bSLuis R. Rodriguez * 5 GHz -- For example in country IEs if the first 562615aab4bSLuis R. Rodriguez * channel given is 36 and the number of channels is 4 563615aab4bSLuis R. Rodriguez * then the individual channel numbers defined for the 564615aab4bSLuis R. Rodriguez * 5 GHz PHY by these parameters are: 36, 40, 44, and 48 565615aab4bSLuis R. Rodriguez * and not 36, 37, 38, 39. 566615aab4bSLuis R. Rodriguez * 567615aab4bSLuis R. Rodriguez * See: http://tinyurl.com/11d-clarification 568615aab4bSLuis R. Rodriguez */ 569615aab4bSLuis R. Rodriguez end_channel = triplet->chans.first_channel + 570615aab4bSLuis R. Rodriguez (4 * (triplet->chans.num_channels - 1)); 571615aab4bSLuis R. Rodriguez 5723f2355cbSLuis R. Rodriguez cur_channel = triplet->chans.first_channel; 573615aab4bSLuis R. Rodriguez cur_sub_max_channel = end_channel; 5743f2355cbSLuis R. Rodriguez 5753f2355cbSLuis R. Rodriguez /* Basic sanity check */ 5763f2355cbSLuis R. Rodriguez if (cur_sub_max_channel < cur_channel) 5773f2355cbSLuis R. Rodriguez return NULL; 5783f2355cbSLuis R. Rodriguez 579fb1fc7adSLuis R. Rodriguez /* 580fb1fc7adSLuis R. Rodriguez * Do not allow overlapping channels. Also channels 5813f2355cbSLuis R. Rodriguez * passed in each subband must be monotonically 582fb1fc7adSLuis R. Rodriguez * increasing 583fb1fc7adSLuis R. Rodriguez */ 5843f2355cbSLuis R. Rodriguez if (last_sub_max_channel) { 5853f2355cbSLuis R. Rodriguez if (cur_channel <= last_sub_max_channel) 5863f2355cbSLuis R. Rodriguez return NULL; 5873f2355cbSLuis R. Rodriguez if (cur_sub_max_channel <= last_sub_max_channel) 5883f2355cbSLuis R. Rodriguez return NULL; 5893f2355cbSLuis R. Rodriguez } 5903f2355cbSLuis R. Rodriguez 591fb1fc7adSLuis R. Rodriguez /* 592fb1fc7adSLuis R. Rodriguez * When dot11RegulatoryClassesRequired is supported 5933f2355cbSLuis R. Rodriguez * we can throw ext triplets as part of this soup, 5943f2355cbSLuis R. Rodriguez * for now we don't care when those change as we 595fb1fc7adSLuis R. Rodriguez * don't support them 596fb1fc7adSLuis R. Rodriguez */ 5973f2355cbSLuis R. Rodriguez *checksum ^= ((cur_channel ^ cur_sub_max_channel) << 8) | 5983f2355cbSLuis R. Rodriguez ((cur_sub_max_channel ^ cur_sub_max_channel) << 16) | 5993f2355cbSLuis R. Rodriguez ((triplet->chans.max_power ^ cur_sub_max_channel) << 24); 6003f2355cbSLuis R. Rodriguez 6013f2355cbSLuis R. Rodriguez last_sub_max_channel = cur_sub_max_channel; 6023f2355cbSLuis R. Rodriguez 6033f2355cbSLuis R. Rodriguez country_ie += 3; 6043f2355cbSLuis R. Rodriguez country_ie_len -= 3; 6053f2355cbSLuis R. Rodriguez num_rules++; 6063f2355cbSLuis R. Rodriguez 607fb1fc7adSLuis R. Rodriguez /* 608fb1fc7adSLuis R. Rodriguez * Note: this is not a IEEE requirement but 609fb1fc7adSLuis R. Rodriguez * simply a memory requirement 610fb1fc7adSLuis R. Rodriguez */ 6113f2355cbSLuis R. Rodriguez if (num_rules > NL80211_MAX_SUPP_REG_RULES) 6123f2355cbSLuis R. Rodriguez return NULL; 6133f2355cbSLuis R. Rodriguez } 6143f2355cbSLuis R. Rodriguez 6153f2355cbSLuis R. Rodriguez country_ie = triplets_start; 6163f2355cbSLuis R. Rodriguez country_ie_len = len_at_triplet; 6173f2355cbSLuis R. Rodriguez 6183f2355cbSLuis R. Rodriguez size_of_regd = sizeof(struct ieee80211_regdomain) + 6193f2355cbSLuis R. Rodriguez (num_rules * sizeof(struct ieee80211_reg_rule)); 6203f2355cbSLuis R. Rodriguez 6213f2355cbSLuis R. Rodriguez rd = kzalloc(size_of_regd, GFP_KERNEL); 6223f2355cbSLuis R. Rodriguez if (!rd) 6233f2355cbSLuis R. Rodriguez return NULL; 6243f2355cbSLuis R. Rodriguez 6253f2355cbSLuis R. Rodriguez rd->n_reg_rules = num_rules; 6263f2355cbSLuis R. Rodriguez rd->alpha2[0] = alpha2[0]; 6273f2355cbSLuis R. Rodriguez rd->alpha2[1] = alpha2[1]; 6283f2355cbSLuis R. Rodriguez 6293f2355cbSLuis R. Rodriguez /* This time around we fill in the rd */ 6303f2355cbSLuis R. Rodriguez while (country_ie_len >= 3) { 63102e68a3dSLuis R. Rodriguez int end_channel = 0; 6323f2355cbSLuis R. Rodriguez struct ieee80211_country_ie_triplet *triplet = 6333f2355cbSLuis R. Rodriguez (struct ieee80211_country_ie_triplet *) country_ie; 6343f2355cbSLuis R. Rodriguez struct ieee80211_reg_rule *reg_rule = NULL; 6353f2355cbSLuis R. Rodriguez struct ieee80211_freq_range *freq_range = NULL; 6363f2355cbSLuis R. Rodriguez struct ieee80211_power_rule *power_rule = NULL; 6373f2355cbSLuis R. Rodriguez 638fb1fc7adSLuis R. Rodriguez /* 639fb1fc7adSLuis R. Rodriguez * Must parse if dot11RegulatoryClassesRequired is true, 640fb1fc7adSLuis R. Rodriguez * we don't support this yet 641fb1fc7adSLuis R. Rodriguez */ 6423f2355cbSLuis R. Rodriguez if (triplet->ext.reg_extension_id >= 6433f2355cbSLuis R. Rodriguez IEEE80211_COUNTRY_EXTENSION_ID) { 6443f2355cbSLuis R. Rodriguez country_ie += 3; 6453f2355cbSLuis R. Rodriguez country_ie_len -= 3; 6463f2355cbSLuis R. Rodriguez continue; 6473f2355cbSLuis R. Rodriguez } 6483f2355cbSLuis R. Rodriguez 6493f2355cbSLuis R. Rodriguez reg_rule = &rd->reg_rules[i]; 6503f2355cbSLuis R. Rodriguez freq_range = ®_rule->freq_range; 6513f2355cbSLuis R. Rodriguez power_rule = ®_rule->power_rule; 6523f2355cbSLuis R. Rodriguez 6533f2355cbSLuis R. Rodriguez reg_rule->flags = flags; 6543f2355cbSLuis R. Rodriguez 65502e68a3dSLuis R. Rodriguez /* 2 GHz */ 65602e68a3dSLuis R. Rodriguez if (triplet->chans.first_channel <= 14) 65702e68a3dSLuis R. Rodriguez end_channel = triplet->chans.first_channel + 65802e68a3dSLuis R. Rodriguez triplet->chans.num_channels; 65902e68a3dSLuis R. Rodriguez else 66002e68a3dSLuis R. Rodriguez end_channel = triplet->chans.first_channel + 66102e68a3dSLuis R. Rodriguez (4 * (triplet->chans.num_channels - 1)); 66202e68a3dSLuis R. Rodriguez 663fb1fc7adSLuis R. Rodriguez /* 664fb1fc7adSLuis R. Rodriguez * The +10 is since the regulatory domain expects 6653f2355cbSLuis R. Rodriguez * the actual band edge, not the center of freq for 6663f2355cbSLuis R. Rodriguez * its start and end freqs, assuming 20 MHz bandwidth on 667fb1fc7adSLuis R. Rodriguez * the channels passed 668fb1fc7adSLuis R. Rodriguez */ 6693f2355cbSLuis R. Rodriguez freq_range->start_freq_khz = 6703f2355cbSLuis R. Rodriguez MHZ_TO_KHZ(ieee80211_channel_to_frequency( 6713f2355cbSLuis R. Rodriguez triplet->chans.first_channel) - 10); 6723f2355cbSLuis R. Rodriguez freq_range->end_freq_khz = 6733f2355cbSLuis R. Rodriguez MHZ_TO_KHZ(ieee80211_channel_to_frequency( 67402e68a3dSLuis R. Rodriguez end_channel) + 10); 6753f2355cbSLuis R. Rodriguez 676fb1fc7adSLuis R. Rodriguez /* 677fb1fc7adSLuis R. Rodriguez * These are large arbitrary values we use to intersect later. 678fb1fc7adSLuis R. Rodriguez * Increment this if we ever support >= 40 MHz channels 679fb1fc7adSLuis R. Rodriguez * in IEEE 802.11 680fb1fc7adSLuis R. Rodriguez */ 6813f2355cbSLuis R. Rodriguez freq_range->max_bandwidth_khz = MHZ_TO_KHZ(40); 6823f2355cbSLuis R. Rodriguez power_rule->max_antenna_gain = DBI_TO_MBI(100); 6833f2355cbSLuis R. Rodriguez power_rule->max_eirp = DBM_TO_MBM(100); 6843f2355cbSLuis R. Rodriguez 6853f2355cbSLuis R. Rodriguez country_ie += 3; 6863f2355cbSLuis R. Rodriguez country_ie_len -= 3; 6873f2355cbSLuis R. Rodriguez i++; 6883f2355cbSLuis R. Rodriguez 6893f2355cbSLuis R. Rodriguez BUG_ON(i > NL80211_MAX_SUPP_REG_RULES); 6903f2355cbSLuis R. Rodriguez } 6913f2355cbSLuis R. Rodriguez 6923f2355cbSLuis R. Rodriguez return rd; 6933f2355cbSLuis R. Rodriguez } 6943f2355cbSLuis R. Rodriguez 6953f2355cbSLuis R. Rodriguez 696fb1fc7adSLuis R. Rodriguez /* 697fb1fc7adSLuis R. Rodriguez * Helper for regdom_intersect(), this does the real 698fb1fc7adSLuis R. Rodriguez * mathematical intersection fun 699fb1fc7adSLuis R. Rodriguez */ 7009c96477dSLuis R. Rodriguez static int reg_rules_intersect( 7019c96477dSLuis R. Rodriguez const struct ieee80211_reg_rule *rule1, 7029c96477dSLuis R. Rodriguez const struct ieee80211_reg_rule *rule2, 7039c96477dSLuis R. Rodriguez struct ieee80211_reg_rule *intersected_rule) 7049c96477dSLuis R. Rodriguez { 7059c96477dSLuis R. Rodriguez const struct ieee80211_freq_range *freq_range1, *freq_range2; 7069c96477dSLuis R. Rodriguez struct ieee80211_freq_range *freq_range; 7079c96477dSLuis R. Rodriguez const struct ieee80211_power_rule *power_rule1, *power_rule2; 7089c96477dSLuis R. Rodriguez struct ieee80211_power_rule *power_rule; 7099c96477dSLuis R. Rodriguez u32 freq_diff; 7109c96477dSLuis R. Rodriguez 7119c96477dSLuis R. Rodriguez freq_range1 = &rule1->freq_range; 7129c96477dSLuis R. Rodriguez freq_range2 = &rule2->freq_range; 7139c96477dSLuis R. Rodriguez freq_range = &intersected_rule->freq_range; 7149c96477dSLuis R. Rodriguez 7159c96477dSLuis R. Rodriguez power_rule1 = &rule1->power_rule; 7169c96477dSLuis R. Rodriguez power_rule2 = &rule2->power_rule; 7179c96477dSLuis R. Rodriguez power_rule = &intersected_rule->power_rule; 7189c96477dSLuis R. Rodriguez 7199c96477dSLuis R. Rodriguez freq_range->start_freq_khz = max(freq_range1->start_freq_khz, 7209c96477dSLuis R. Rodriguez freq_range2->start_freq_khz); 7219c96477dSLuis R. Rodriguez freq_range->end_freq_khz = min(freq_range1->end_freq_khz, 7229c96477dSLuis R. Rodriguez freq_range2->end_freq_khz); 7239c96477dSLuis R. Rodriguez freq_range->max_bandwidth_khz = min(freq_range1->max_bandwidth_khz, 7249c96477dSLuis R. Rodriguez freq_range2->max_bandwidth_khz); 7259c96477dSLuis R. Rodriguez 7269c96477dSLuis R. Rodriguez freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz; 7279c96477dSLuis R. Rodriguez if (freq_range->max_bandwidth_khz > freq_diff) 7289c96477dSLuis R. Rodriguez freq_range->max_bandwidth_khz = freq_diff; 7299c96477dSLuis R. Rodriguez 7309c96477dSLuis R. Rodriguez power_rule->max_eirp = min(power_rule1->max_eirp, 7319c96477dSLuis R. Rodriguez power_rule2->max_eirp); 7329c96477dSLuis R. Rodriguez power_rule->max_antenna_gain = min(power_rule1->max_antenna_gain, 7339c96477dSLuis R. Rodriguez power_rule2->max_antenna_gain); 7349c96477dSLuis R. Rodriguez 7359c96477dSLuis R. Rodriguez intersected_rule->flags = (rule1->flags | rule2->flags); 7369c96477dSLuis R. Rodriguez 7379c96477dSLuis R. Rodriguez if (!is_valid_reg_rule(intersected_rule)) 7389c96477dSLuis R. Rodriguez return -EINVAL; 7399c96477dSLuis R. Rodriguez 7409c96477dSLuis R. Rodriguez return 0; 7419c96477dSLuis R. Rodriguez } 7429c96477dSLuis R. Rodriguez 7439c96477dSLuis R. Rodriguez /** 7449c96477dSLuis R. Rodriguez * regdom_intersect - do the intersection between two regulatory domains 7459c96477dSLuis R. Rodriguez * @rd1: first regulatory domain 7469c96477dSLuis R. Rodriguez * @rd2: second regulatory domain 7479c96477dSLuis R. Rodriguez * 7489c96477dSLuis R. Rodriguez * Use this function to get the intersection between two regulatory domains. 7499c96477dSLuis R. Rodriguez * Once completed we will mark the alpha2 for the rd as intersected, "98", 7509c96477dSLuis R. Rodriguez * as no one single alpha2 can represent this regulatory domain. 7519c96477dSLuis R. Rodriguez * 7529c96477dSLuis R. Rodriguez * Returns a pointer to the regulatory domain structure which will hold the 7539c96477dSLuis R. Rodriguez * resulting intersection of rules between rd1 and rd2. We will 7549c96477dSLuis R. Rodriguez * kzalloc() this structure for you. 7559c96477dSLuis R. Rodriguez */ 7569c96477dSLuis R. Rodriguez static struct ieee80211_regdomain *regdom_intersect( 7579c96477dSLuis R. Rodriguez const struct ieee80211_regdomain *rd1, 7589c96477dSLuis R. Rodriguez const struct ieee80211_regdomain *rd2) 7599c96477dSLuis R. Rodriguez { 7609c96477dSLuis R. Rodriguez int r, size_of_regd; 7619c96477dSLuis R. Rodriguez unsigned int x, y; 7629c96477dSLuis R. Rodriguez unsigned int num_rules = 0, rule_idx = 0; 7639c96477dSLuis R. Rodriguez const struct ieee80211_reg_rule *rule1, *rule2; 7649c96477dSLuis R. Rodriguez struct ieee80211_reg_rule *intersected_rule; 7659c96477dSLuis R. Rodriguez struct ieee80211_regdomain *rd; 7669c96477dSLuis R. Rodriguez /* This is just a dummy holder to help us count */ 7679c96477dSLuis R. Rodriguez struct ieee80211_reg_rule irule; 7689c96477dSLuis R. Rodriguez 7699c96477dSLuis R. Rodriguez /* Uses the stack temporarily for counter arithmetic */ 7709c96477dSLuis R. Rodriguez intersected_rule = &irule; 7719c96477dSLuis R. Rodriguez 7729c96477dSLuis R. Rodriguez memset(intersected_rule, 0, sizeof(struct ieee80211_reg_rule)); 7739c96477dSLuis R. Rodriguez 7749c96477dSLuis R. Rodriguez if (!rd1 || !rd2) 7759c96477dSLuis R. Rodriguez return NULL; 7769c96477dSLuis R. Rodriguez 777fb1fc7adSLuis R. Rodriguez /* 778fb1fc7adSLuis R. Rodriguez * First we get a count of the rules we'll need, then we actually 7799c96477dSLuis R. Rodriguez * build them. This is to so we can malloc() and free() a 7809c96477dSLuis R. Rodriguez * regdomain once. The reason we use reg_rules_intersect() here 7819c96477dSLuis R. Rodriguez * is it will return -EINVAL if the rule computed makes no sense. 782fb1fc7adSLuis R. Rodriguez * All rules that do check out OK are valid. 783fb1fc7adSLuis R. Rodriguez */ 7849c96477dSLuis R. Rodriguez 7859c96477dSLuis R. Rodriguez for (x = 0; x < rd1->n_reg_rules; x++) { 7869c96477dSLuis R. Rodriguez rule1 = &rd1->reg_rules[x]; 7879c96477dSLuis R. Rodriguez for (y = 0; y < rd2->n_reg_rules; y++) { 7889c96477dSLuis R. Rodriguez rule2 = &rd2->reg_rules[y]; 7899c96477dSLuis R. Rodriguez if (!reg_rules_intersect(rule1, rule2, 7909c96477dSLuis R. Rodriguez intersected_rule)) 7919c96477dSLuis R. Rodriguez num_rules++; 7929c96477dSLuis R. Rodriguez memset(intersected_rule, 0, 7939c96477dSLuis R. Rodriguez sizeof(struct ieee80211_reg_rule)); 7949c96477dSLuis R. Rodriguez } 7959c96477dSLuis R. Rodriguez } 7969c96477dSLuis R. Rodriguez 7979c96477dSLuis R. Rodriguez if (!num_rules) 7989c96477dSLuis R. Rodriguez return NULL; 7999c96477dSLuis R. Rodriguez 8009c96477dSLuis R. Rodriguez size_of_regd = sizeof(struct ieee80211_regdomain) + 8019c96477dSLuis R. Rodriguez ((num_rules + 1) * sizeof(struct ieee80211_reg_rule)); 8029c96477dSLuis R. Rodriguez 8039c96477dSLuis R. Rodriguez rd = kzalloc(size_of_regd, GFP_KERNEL); 8049c96477dSLuis R. Rodriguez if (!rd) 8059c96477dSLuis R. Rodriguez return NULL; 8069c96477dSLuis R. Rodriguez 8079c96477dSLuis R. Rodriguez for (x = 0; x < rd1->n_reg_rules; x++) { 8089c96477dSLuis R. Rodriguez rule1 = &rd1->reg_rules[x]; 8099c96477dSLuis R. Rodriguez for (y = 0; y < rd2->n_reg_rules; y++) { 8109c96477dSLuis R. Rodriguez rule2 = &rd2->reg_rules[y]; 811fb1fc7adSLuis R. Rodriguez /* 812fb1fc7adSLuis R. Rodriguez * This time around instead of using the stack lets 8139c96477dSLuis R. Rodriguez * write to the target rule directly saving ourselves 814fb1fc7adSLuis R. Rodriguez * a memcpy() 815fb1fc7adSLuis R. Rodriguez */ 8169c96477dSLuis R. Rodriguez intersected_rule = &rd->reg_rules[rule_idx]; 8179c96477dSLuis R. Rodriguez r = reg_rules_intersect(rule1, rule2, 8189c96477dSLuis R. Rodriguez intersected_rule); 819fb1fc7adSLuis R. Rodriguez /* 820fb1fc7adSLuis R. Rodriguez * No need to memset here the intersected rule here as 821fb1fc7adSLuis R. Rodriguez * we're not using the stack anymore 822fb1fc7adSLuis R. Rodriguez */ 8239c96477dSLuis R. Rodriguez if (r) 8249c96477dSLuis R. Rodriguez continue; 8259c96477dSLuis R. Rodriguez rule_idx++; 8269c96477dSLuis R. Rodriguez } 8279c96477dSLuis R. Rodriguez } 8289c96477dSLuis R. Rodriguez 8299c96477dSLuis R. Rodriguez if (rule_idx != num_rules) { 8309c96477dSLuis R. Rodriguez kfree(rd); 8319c96477dSLuis R. Rodriguez return NULL; 8329c96477dSLuis R. Rodriguez } 8339c96477dSLuis R. Rodriguez 8349c96477dSLuis R. Rodriguez rd->n_reg_rules = num_rules; 8359c96477dSLuis R. Rodriguez rd->alpha2[0] = '9'; 8369c96477dSLuis R. Rodriguez rd->alpha2[1] = '8'; 8379c96477dSLuis R. Rodriguez 8389c96477dSLuis R. Rodriguez return rd; 8399c96477dSLuis R. Rodriguez } 8409c96477dSLuis R. Rodriguez 841fb1fc7adSLuis R. Rodriguez /* 842fb1fc7adSLuis R. Rodriguez * XXX: add support for the rest of enum nl80211_reg_rule_flags, we may 843fb1fc7adSLuis R. Rodriguez * want to just have the channel structure use these 844fb1fc7adSLuis R. Rodriguez */ 845b2e1b302SLuis R. Rodriguez static u32 map_regdom_flags(u32 rd_flags) 846b2e1b302SLuis R. Rodriguez { 847b2e1b302SLuis R. Rodriguez u32 channel_flags = 0; 848b2e1b302SLuis R. Rodriguez if (rd_flags & NL80211_RRF_PASSIVE_SCAN) 849b2e1b302SLuis R. Rodriguez channel_flags |= IEEE80211_CHAN_PASSIVE_SCAN; 850b2e1b302SLuis R. Rodriguez if (rd_flags & NL80211_RRF_NO_IBSS) 851b2e1b302SLuis R. Rodriguez channel_flags |= IEEE80211_CHAN_NO_IBSS; 852b2e1b302SLuis R. Rodriguez if (rd_flags & NL80211_RRF_DFS) 853b2e1b302SLuis R. Rodriguez channel_flags |= IEEE80211_CHAN_RADAR; 854b2e1b302SLuis R. Rodriguez return channel_flags; 855b2e1b302SLuis R. Rodriguez } 856b2e1b302SLuis R. Rodriguez 8571fa25e41SLuis R. Rodriguez static int freq_reg_info_regd(struct wiphy *wiphy, 8581fa25e41SLuis R. Rodriguez u32 center_freq, 859038659e7SLuis R. Rodriguez u32 desired_bw_khz, 8601fa25e41SLuis R. Rodriguez const struct ieee80211_reg_rule **reg_rule, 8611fa25e41SLuis R. Rodriguez const struct ieee80211_regdomain *custom_regd) 8628318d78aSJohannes Berg { 8638318d78aSJohannes Berg int i; 8640c7dc45dSLuis R. Rodriguez bool band_rule_found = false; 8653e0c3ff3SLuis R. Rodriguez const struct ieee80211_regdomain *regd; 866038659e7SLuis R. Rodriguez bool bw_fits = false; 867038659e7SLuis R. Rodriguez 868038659e7SLuis R. Rodriguez if (!desired_bw_khz) 869038659e7SLuis R. Rodriguez desired_bw_khz = MHZ_TO_KHZ(20); 8708318d78aSJohannes Berg 8711fa25e41SLuis R. Rodriguez regd = custom_regd ? custom_regd : cfg80211_regdomain; 8723e0c3ff3SLuis R. Rodriguez 873fb1fc7adSLuis R. Rodriguez /* 874fb1fc7adSLuis R. Rodriguez * Follow the driver's regulatory domain, if present, unless a country 875fb1fc7adSLuis R. Rodriguez * IE has been processed or a user wants to help complaince further 876fb1fc7adSLuis R. Rodriguez */ 8777db90f4aSLuis R. Rodriguez if (last_request->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && 8787db90f4aSLuis R. Rodriguez last_request->initiator != NL80211_REGDOM_SET_BY_USER && 8793e0c3ff3SLuis R. Rodriguez wiphy->regd) 8803e0c3ff3SLuis R. Rodriguez regd = wiphy->regd; 8813e0c3ff3SLuis R. Rodriguez 8823e0c3ff3SLuis R. Rodriguez if (!regd) 883b2e1b302SLuis R. Rodriguez return -EINVAL; 884b2e1b302SLuis R. Rodriguez 8853e0c3ff3SLuis R. Rodriguez for (i = 0; i < regd->n_reg_rules; i++) { 886b2e1b302SLuis R. Rodriguez const struct ieee80211_reg_rule *rr; 887b2e1b302SLuis R. Rodriguez const struct ieee80211_freq_range *fr = NULL; 888b2e1b302SLuis R. Rodriguez const struct ieee80211_power_rule *pr = NULL; 889b2e1b302SLuis R. Rodriguez 8903e0c3ff3SLuis R. Rodriguez rr = ®d->reg_rules[i]; 891b2e1b302SLuis R. Rodriguez fr = &rr->freq_range; 892b2e1b302SLuis R. Rodriguez pr = &rr->power_rule; 8930c7dc45dSLuis R. Rodriguez 894fb1fc7adSLuis R. Rodriguez /* 895fb1fc7adSLuis R. Rodriguez * We only need to know if one frequency rule was 8960c7dc45dSLuis R. Rodriguez * was in center_freq's band, that's enough, so lets 897fb1fc7adSLuis R. Rodriguez * not overwrite it once found 898fb1fc7adSLuis R. Rodriguez */ 8990c7dc45dSLuis R. Rodriguez if (!band_rule_found) 9000c7dc45dSLuis R. Rodriguez band_rule_found = freq_in_rule_band(fr, center_freq); 9010c7dc45dSLuis R. Rodriguez 902038659e7SLuis R. Rodriguez bw_fits = reg_does_bw_fit(fr, 903038659e7SLuis R. Rodriguez center_freq, 904038659e7SLuis R. Rodriguez desired_bw_khz); 9050c7dc45dSLuis R. Rodriguez 906038659e7SLuis R. Rodriguez if (band_rule_found && bw_fits) { 907b2e1b302SLuis R. Rodriguez *reg_rule = rr; 908038659e7SLuis R. Rodriguez return 0; 9098318d78aSJohannes Berg } 9108318d78aSJohannes Berg } 9118318d78aSJohannes Berg 9120c7dc45dSLuis R. Rodriguez if (!band_rule_found) 9130c7dc45dSLuis R. Rodriguez return -ERANGE; 9140c7dc45dSLuis R. Rodriguez 915038659e7SLuis R. Rodriguez return -EINVAL; 916b2e1b302SLuis R. Rodriguez } 91734f57347SLuis R. Rodriguez EXPORT_SYMBOL(freq_reg_info); 918b2e1b302SLuis R. Rodriguez 919038659e7SLuis R. Rodriguez int freq_reg_info(struct wiphy *wiphy, 920038659e7SLuis R. Rodriguez u32 center_freq, 921038659e7SLuis R. Rodriguez u32 desired_bw_khz, 9221fa25e41SLuis R. Rodriguez const struct ieee80211_reg_rule **reg_rule) 9231fa25e41SLuis R. Rodriguez { 924ac46d48eSLuis R. Rodriguez assert_cfg80211_lock(); 925038659e7SLuis R. Rodriguez return freq_reg_info_regd(wiphy, 926038659e7SLuis R. Rodriguez center_freq, 927038659e7SLuis R. Rodriguez desired_bw_khz, 928038659e7SLuis R. Rodriguez reg_rule, 929038659e7SLuis R. Rodriguez NULL); 9301fa25e41SLuis R. Rodriguez } 931b2e1b302SLuis R. Rodriguez 932038659e7SLuis R. Rodriguez /* 933038659e7SLuis R. Rodriguez * Note that right now we assume the desired channel bandwidth 934038659e7SLuis R. Rodriguez * is always 20 MHz for each individual channel (HT40 uses 20 MHz 935038659e7SLuis R. Rodriguez * per channel, the primary and the extension channel). To support 936038659e7SLuis R. Rodriguez * smaller custom bandwidths such as 5 MHz or 10 MHz we'll need a 937038659e7SLuis R. Rodriguez * new ieee80211_channel.target_bw and re run the regulatory check 938038659e7SLuis R. Rodriguez * on the wiphy with the target_bw specified. Then we can simply use 939038659e7SLuis R. Rodriguez * that below for the desired_bw_khz below. 940038659e7SLuis R. Rodriguez */ 941a92a3ce7SLuis R. Rodriguez static void handle_channel(struct wiphy *wiphy, enum ieee80211_band band, 942a92a3ce7SLuis R. Rodriguez unsigned int chan_idx) 943b2e1b302SLuis R. Rodriguez { 944b2e1b302SLuis R. Rodriguez int r; 945038659e7SLuis R. Rodriguez u32 flags, bw_flags = 0; 946038659e7SLuis R. Rodriguez u32 desired_bw_khz = MHZ_TO_KHZ(20); 947b2e1b302SLuis R. Rodriguez const struct ieee80211_reg_rule *reg_rule = NULL; 948b2e1b302SLuis R. Rodriguez const struct ieee80211_power_rule *power_rule = NULL; 949038659e7SLuis R. Rodriguez const struct ieee80211_freq_range *freq_range = NULL; 950a92a3ce7SLuis R. Rodriguez struct ieee80211_supported_band *sband; 951a92a3ce7SLuis R. Rodriguez struct ieee80211_channel *chan; 952fe33eb39SLuis R. Rodriguez struct wiphy *request_wiphy = NULL; 953a92a3ce7SLuis R. Rodriguez 954761cf7ecSLuis R. Rodriguez assert_cfg80211_lock(); 955761cf7ecSLuis R. Rodriguez 956806a9e39SLuis R. Rodriguez request_wiphy = wiphy_idx_to_wiphy(last_request->wiphy_idx); 957806a9e39SLuis R. Rodriguez 958a92a3ce7SLuis R. Rodriguez sband = wiphy->bands[band]; 959a92a3ce7SLuis R. Rodriguez BUG_ON(chan_idx >= sband->n_channels); 960a92a3ce7SLuis R. Rodriguez chan = &sband->channels[chan_idx]; 961a92a3ce7SLuis R. Rodriguez 962a92a3ce7SLuis R. Rodriguez flags = chan->orig_flags; 963b2e1b302SLuis R. Rodriguez 964038659e7SLuis R. Rodriguez r = freq_reg_info(wiphy, 965038659e7SLuis R. Rodriguez MHZ_TO_KHZ(chan->center_freq), 966038659e7SLuis R. Rodriguez desired_bw_khz, 967038659e7SLuis R. Rodriguez ®_rule); 968b2e1b302SLuis R. Rodriguez 969b2e1b302SLuis R. Rodriguez if (r) { 970fb1fc7adSLuis R. Rodriguez /* 971fb1fc7adSLuis R. Rodriguez * This means no regulatory rule was found in the country IE 9720c7dc45dSLuis R. Rodriguez * with a frequency range on the center_freq's band, since 9730c7dc45dSLuis R. Rodriguez * IEEE-802.11 allows for a country IE to have a subset of the 9740c7dc45dSLuis R. Rodriguez * regulatory information provided in a country we ignore 9750c7dc45dSLuis R. Rodriguez * disabling the channel unless at least one reg rule was 9760c7dc45dSLuis R. Rodriguez * found on the center_freq's band. For details see this 9770c7dc45dSLuis R. Rodriguez * clarification: 9780c7dc45dSLuis R. Rodriguez * 9790c7dc45dSLuis R. Rodriguez * http://tinyurl.com/11d-clarification 9800c7dc45dSLuis R. Rodriguez */ 9810c7dc45dSLuis R. Rodriguez if (r == -ERANGE && 9827db90f4aSLuis R. Rodriguez last_request->initiator == 9837db90f4aSLuis R. Rodriguez NL80211_REGDOM_SET_BY_COUNTRY_IE) { 9844113f751SLuis R. Rodriguez REG_DBG_PRINT("cfg80211: Leaving channel %d MHz " 9850c7dc45dSLuis R. Rodriguez "intact on %s - no rule found in band on " 9860c7dc45dSLuis R. Rodriguez "Country IE\n", 9870c7dc45dSLuis R. Rodriguez chan->center_freq, wiphy_name(wiphy)); 9880c7dc45dSLuis R. Rodriguez } else { 989fb1fc7adSLuis R. Rodriguez /* 990fb1fc7adSLuis R. Rodriguez * In this case we know the country IE has at least one reg rule 991fb1fc7adSLuis R. Rodriguez * for the band so we respect its band definitions 992fb1fc7adSLuis R. Rodriguez */ 9937db90f4aSLuis R. Rodriguez if (last_request->initiator == 9947db90f4aSLuis R. Rodriguez NL80211_REGDOM_SET_BY_COUNTRY_IE) 9954113f751SLuis R. Rodriguez REG_DBG_PRINT("cfg80211: Disabling " 9960c7dc45dSLuis R. Rodriguez "channel %d MHz on %s due to " 9970c7dc45dSLuis R. Rodriguez "Country IE\n", 9980c7dc45dSLuis R. Rodriguez chan->center_freq, wiphy_name(wiphy)); 9998318d78aSJohannes Berg flags |= IEEE80211_CHAN_DISABLED; 10008318d78aSJohannes Berg chan->flags = flags; 10010c7dc45dSLuis R. Rodriguez } 10028318d78aSJohannes Berg return; 10038318d78aSJohannes Berg } 10048318d78aSJohannes Berg 1005b2e1b302SLuis R. Rodriguez power_rule = ®_rule->power_rule; 1006038659e7SLuis R. Rodriguez freq_range = ®_rule->freq_range; 1007038659e7SLuis R. Rodriguez 1008038659e7SLuis R. Rodriguez if (freq_range->max_bandwidth_khz < MHZ_TO_KHZ(40)) 1009038659e7SLuis R. Rodriguez bw_flags = IEEE80211_CHAN_NO_HT40; 1010b2e1b302SLuis R. Rodriguez 10117db90f4aSLuis R. Rodriguez if (last_request->initiator == NL80211_REGDOM_SET_BY_DRIVER && 1012806a9e39SLuis R. Rodriguez request_wiphy && request_wiphy == wiphy && 10135be83de5SJohannes Berg request_wiphy->flags & WIPHY_FLAG_STRICT_REGULATORY) { 1014fb1fc7adSLuis R. Rodriguez /* 1015fb1fc7adSLuis R. Rodriguez * This gaurantees the driver's requested regulatory domain 1016f976376dSLuis R. Rodriguez * will always be used as a base for further regulatory 1017fb1fc7adSLuis R. Rodriguez * settings 1018fb1fc7adSLuis R. Rodriguez */ 1019f976376dSLuis R. Rodriguez chan->flags = chan->orig_flags = 1020038659e7SLuis R. Rodriguez map_regdom_flags(reg_rule->flags) | bw_flags; 1021f976376dSLuis R. Rodriguez chan->max_antenna_gain = chan->orig_mag = 1022f976376dSLuis R. Rodriguez (int) MBI_TO_DBI(power_rule->max_antenna_gain); 1023f976376dSLuis R. Rodriguez chan->max_power = chan->orig_mpwr = 1024f976376dSLuis R. Rodriguez (int) MBM_TO_DBM(power_rule->max_eirp); 1025f976376dSLuis R. Rodriguez return; 1026f976376dSLuis R. Rodriguez } 1027f976376dSLuis R. Rodriguez 1028038659e7SLuis R. Rodriguez chan->flags = flags | bw_flags | map_regdom_flags(reg_rule->flags); 10298318d78aSJohannes Berg chan->max_antenna_gain = min(chan->orig_mag, 1030b2e1b302SLuis R. Rodriguez (int) MBI_TO_DBI(power_rule->max_antenna_gain)); 1031253898c4SJohn W. Linville if (chan->orig_mpwr) 1032b2e1b302SLuis R. Rodriguez chan->max_power = min(chan->orig_mpwr, 1033b2e1b302SLuis R. Rodriguez (int) MBM_TO_DBM(power_rule->max_eirp)); 1034253898c4SJohn W. Linville else 1035b2e1b302SLuis R. Rodriguez chan->max_power = (int) MBM_TO_DBM(power_rule->max_eirp); 10368318d78aSJohannes Berg } 10378318d78aSJohannes Berg 1038a92a3ce7SLuis R. Rodriguez static void handle_band(struct wiphy *wiphy, enum ieee80211_band band) 10398318d78aSJohannes Berg { 1040a92a3ce7SLuis R. Rodriguez unsigned int i; 1041a92a3ce7SLuis R. Rodriguez struct ieee80211_supported_band *sband; 1042a92a3ce7SLuis R. Rodriguez 1043a92a3ce7SLuis R. Rodriguez BUG_ON(!wiphy->bands[band]); 1044a92a3ce7SLuis R. Rodriguez sband = wiphy->bands[band]; 10458318d78aSJohannes Berg 10468318d78aSJohannes Berg for (i = 0; i < sband->n_channels; i++) 1047a92a3ce7SLuis R. Rodriguez handle_channel(wiphy, band, i); 10488318d78aSJohannes Berg } 10498318d78aSJohannes Berg 10507db90f4aSLuis R. Rodriguez static bool ignore_reg_update(struct wiphy *wiphy, 10517db90f4aSLuis R. Rodriguez enum nl80211_reg_initiator initiator) 105214b9815aSLuis R. Rodriguez { 105314b9815aSLuis R. Rodriguez if (!last_request) 105414b9815aSLuis R. Rodriguez return true; 10557db90f4aSLuis R. Rodriguez if (initiator == NL80211_REGDOM_SET_BY_CORE && 10565be83de5SJohannes Berg wiphy->flags & WIPHY_FLAG_CUSTOM_REGULATORY) 105714b9815aSLuis R. Rodriguez return true; 1058fb1fc7adSLuis R. Rodriguez /* 1059fb1fc7adSLuis R. Rodriguez * wiphy->regd will be set once the device has its own 1060fb1fc7adSLuis R. Rodriguez * desired regulatory domain set 1061fb1fc7adSLuis R. Rodriguez */ 10625be83de5SJohannes Berg if (wiphy->flags & WIPHY_FLAG_STRICT_REGULATORY && !wiphy->regd && 1063f976376dSLuis R. Rodriguez !is_world_regdom(last_request->alpha2)) 106414b9815aSLuis R. Rodriguez return true; 106514b9815aSLuis R. Rodriguez return false; 106614b9815aSLuis R. Rodriguez } 106714b9815aSLuis R. Rodriguez 10687db90f4aSLuis R. Rodriguez static void update_all_wiphy_regulatory(enum nl80211_reg_initiator initiator) 1069b2e1b302SLuis R. Rodriguez { 107079c97e97SJohannes Berg struct cfg80211_registered_device *rdev; 1071b2e1b302SLuis R. Rodriguez 107279c97e97SJohannes Berg list_for_each_entry(rdev, &cfg80211_rdev_list, list) 107379c97e97SJohannes Berg wiphy_update_regulatory(&rdev->wiphy, initiator); 1074b2e1b302SLuis R. Rodriguez } 1075b2e1b302SLuis R. Rodriguez 1076e38f8a7aSLuis R. Rodriguez static void handle_reg_beacon(struct wiphy *wiphy, 1077e38f8a7aSLuis R. Rodriguez unsigned int chan_idx, 1078e38f8a7aSLuis R. Rodriguez struct reg_beacon *reg_beacon) 1079e38f8a7aSLuis R. Rodriguez { 1080e38f8a7aSLuis R. Rodriguez struct ieee80211_supported_band *sband; 1081e38f8a7aSLuis R. Rodriguez struct ieee80211_channel *chan; 10826bad8766SLuis R. Rodriguez bool channel_changed = false; 10836bad8766SLuis R. Rodriguez struct ieee80211_channel chan_before; 1084e38f8a7aSLuis R. Rodriguez 1085e38f8a7aSLuis R. Rodriguez assert_cfg80211_lock(); 1086e38f8a7aSLuis R. Rodriguez 1087e38f8a7aSLuis R. Rodriguez sband = wiphy->bands[reg_beacon->chan.band]; 1088e38f8a7aSLuis R. Rodriguez chan = &sband->channels[chan_idx]; 1089e38f8a7aSLuis R. Rodriguez 1090e38f8a7aSLuis R. Rodriguez if (likely(chan->center_freq != reg_beacon->chan.center_freq)) 1091e38f8a7aSLuis R. Rodriguez return; 1092e38f8a7aSLuis R. Rodriguez 10936bad8766SLuis R. Rodriguez if (chan->beacon_found) 10946bad8766SLuis R. Rodriguez return; 10956bad8766SLuis R. Rodriguez 10966bad8766SLuis R. Rodriguez chan->beacon_found = true; 10976bad8766SLuis R. Rodriguez 10985be83de5SJohannes Berg if (wiphy->flags & WIPHY_FLAG_DISABLE_BEACON_HINTS) 109937184244SLuis R. Rodriguez return; 110037184244SLuis R. Rodriguez 11016bad8766SLuis R. Rodriguez chan_before.center_freq = chan->center_freq; 11026bad8766SLuis R. Rodriguez chan_before.flags = chan->flags; 11036bad8766SLuis R. Rodriguez 110437184244SLuis R. Rodriguez if (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN) { 1105e38f8a7aSLuis R. Rodriguez chan->flags &= ~IEEE80211_CHAN_PASSIVE_SCAN; 11066bad8766SLuis R. Rodriguez channel_changed = true; 1107e38f8a7aSLuis R. Rodriguez } 1108e38f8a7aSLuis R. Rodriguez 110937184244SLuis R. Rodriguez if (chan->flags & IEEE80211_CHAN_NO_IBSS) { 1110e38f8a7aSLuis R. Rodriguez chan->flags &= ~IEEE80211_CHAN_NO_IBSS; 11116bad8766SLuis R. Rodriguez channel_changed = true; 1112e38f8a7aSLuis R. Rodriguez } 1113e38f8a7aSLuis R. Rodriguez 11146bad8766SLuis R. Rodriguez if (channel_changed) 11156bad8766SLuis R. Rodriguez nl80211_send_beacon_hint_event(wiphy, &chan_before, chan); 1116e38f8a7aSLuis R. Rodriguez } 1117e38f8a7aSLuis R. Rodriguez 1118e38f8a7aSLuis R. Rodriguez /* 1119e38f8a7aSLuis R. Rodriguez * Called when a scan on a wiphy finds a beacon on 1120e38f8a7aSLuis R. Rodriguez * new channel 1121e38f8a7aSLuis R. Rodriguez */ 1122e38f8a7aSLuis R. Rodriguez static void wiphy_update_new_beacon(struct wiphy *wiphy, 1123e38f8a7aSLuis R. Rodriguez struct reg_beacon *reg_beacon) 1124e38f8a7aSLuis R. Rodriguez { 1125e38f8a7aSLuis R. Rodriguez unsigned int i; 1126e38f8a7aSLuis R. Rodriguez struct ieee80211_supported_band *sband; 1127e38f8a7aSLuis R. Rodriguez 1128e38f8a7aSLuis R. Rodriguez assert_cfg80211_lock(); 1129e38f8a7aSLuis R. Rodriguez 1130e38f8a7aSLuis R. Rodriguez if (!wiphy->bands[reg_beacon->chan.band]) 1131e38f8a7aSLuis R. Rodriguez return; 1132e38f8a7aSLuis R. Rodriguez 1133e38f8a7aSLuis R. Rodriguez sband = wiphy->bands[reg_beacon->chan.band]; 1134e38f8a7aSLuis R. Rodriguez 1135e38f8a7aSLuis R. Rodriguez for (i = 0; i < sband->n_channels; i++) 1136e38f8a7aSLuis R. Rodriguez handle_reg_beacon(wiphy, i, reg_beacon); 1137e38f8a7aSLuis R. Rodriguez } 1138e38f8a7aSLuis R. Rodriguez 1139e38f8a7aSLuis R. Rodriguez /* 1140e38f8a7aSLuis R. Rodriguez * Called upon reg changes or a new wiphy is added 1141e38f8a7aSLuis R. Rodriguez */ 1142e38f8a7aSLuis R. Rodriguez static void wiphy_update_beacon_reg(struct wiphy *wiphy) 1143e38f8a7aSLuis R. Rodriguez { 1144e38f8a7aSLuis R. Rodriguez unsigned int i; 1145e38f8a7aSLuis R. Rodriguez struct ieee80211_supported_band *sband; 1146e38f8a7aSLuis R. Rodriguez struct reg_beacon *reg_beacon; 1147e38f8a7aSLuis R. Rodriguez 1148e38f8a7aSLuis R. Rodriguez assert_cfg80211_lock(); 1149e38f8a7aSLuis R. Rodriguez 1150e38f8a7aSLuis R. Rodriguez if (list_empty(®_beacon_list)) 1151e38f8a7aSLuis R. Rodriguez return; 1152e38f8a7aSLuis R. Rodriguez 1153e38f8a7aSLuis R. Rodriguez list_for_each_entry(reg_beacon, ®_beacon_list, list) { 1154e38f8a7aSLuis R. Rodriguez if (!wiphy->bands[reg_beacon->chan.band]) 1155e38f8a7aSLuis R. Rodriguez continue; 1156e38f8a7aSLuis R. Rodriguez sband = wiphy->bands[reg_beacon->chan.band]; 1157e38f8a7aSLuis R. Rodriguez for (i = 0; i < sband->n_channels; i++) 1158e38f8a7aSLuis R. Rodriguez handle_reg_beacon(wiphy, i, reg_beacon); 1159e38f8a7aSLuis R. Rodriguez } 1160e38f8a7aSLuis R. Rodriguez } 1161e38f8a7aSLuis R. Rodriguez 1162e38f8a7aSLuis R. Rodriguez static bool reg_is_world_roaming(struct wiphy *wiphy) 1163e38f8a7aSLuis R. Rodriguez { 1164e38f8a7aSLuis R. Rodriguez if (is_world_regdom(cfg80211_regdomain->alpha2) || 1165e38f8a7aSLuis R. Rodriguez (wiphy->regd && is_world_regdom(wiphy->regd->alpha2))) 1166e38f8a7aSLuis R. Rodriguez return true; 1167b1ed8dddSLuis R. Rodriguez if (last_request && 1168b1ed8dddSLuis R. Rodriguez last_request->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && 11695be83de5SJohannes Berg wiphy->flags & WIPHY_FLAG_CUSTOM_REGULATORY) 1170e38f8a7aSLuis R. Rodriguez return true; 1171e38f8a7aSLuis R. Rodriguez return false; 1172e38f8a7aSLuis R. Rodriguez } 1173e38f8a7aSLuis R. Rodriguez 1174e38f8a7aSLuis R. Rodriguez /* Reap the advantages of previously found beacons */ 1175e38f8a7aSLuis R. Rodriguez static void reg_process_beacons(struct wiphy *wiphy) 1176e38f8a7aSLuis R. Rodriguez { 1177b1ed8dddSLuis R. Rodriguez /* 1178b1ed8dddSLuis R. Rodriguez * Means we are just firing up cfg80211, so no beacons would 1179b1ed8dddSLuis R. Rodriguez * have been processed yet. 1180b1ed8dddSLuis R. Rodriguez */ 1181b1ed8dddSLuis R. Rodriguez if (!last_request) 1182b1ed8dddSLuis R. Rodriguez return; 1183e38f8a7aSLuis R. Rodriguez if (!reg_is_world_roaming(wiphy)) 1184e38f8a7aSLuis R. Rodriguez return; 1185e38f8a7aSLuis R. Rodriguez wiphy_update_beacon_reg(wiphy); 1186e38f8a7aSLuis R. Rodriguez } 1187e38f8a7aSLuis R. Rodriguez 1188038659e7SLuis R. Rodriguez static bool is_ht40_not_allowed(struct ieee80211_channel *chan) 1189038659e7SLuis R. Rodriguez { 1190038659e7SLuis R. Rodriguez if (!chan) 1191038659e7SLuis R. Rodriguez return true; 1192038659e7SLuis R. Rodriguez if (chan->flags & IEEE80211_CHAN_DISABLED) 1193038659e7SLuis R. Rodriguez return true; 1194038659e7SLuis R. Rodriguez /* This would happen when regulatory rules disallow HT40 completely */ 1195038659e7SLuis R. Rodriguez if (IEEE80211_CHAN_NO_HT40 == (chan->flags & (IEEE80211_CHAN_NO_HT40))) 1196038659e7SLuis R. Rodriguez return true; 1197038659e7SLuis R. Rodriguez return false; 1198038659e7SLuis R. Rodriguez } 1199038659e7SLuis R. Rodriguez 1200038659e7SLuis R. Rodriguez static void reg_process_ht_flags_channel(struct wiphy *wiphy, 1201038659e7SLuis R. Rodriguez enum ieee80211_band band, 1202038659e7SLuis R. Rodriguez unsigned int chan_idx) 1203038659e7SLuis R. Rodriguez { 1204038659e7SLuis R. Rodriguez struct ieee80211_supported_band *sband; 1205038659e7SLuis R. Rodriguez struct ieee80211_channel *channel; 1206038659e7SLuis R. Rodriguez struct ieee80211_channel *channel_before = NULL, *channel_after = NULL; 1207038659e7SLuis R. Rodriguez unsigned int i; 1208038659e7SLuis R. Rodriguez 1209038659e7SLuis R. Rodriguez assert_cfg80211_lock(); 1210038659e7SLuis R. Rodriguez 1211038659e7SLuis R. Rodriguez sband = wiphy->bands[band]; 1212038659e7SLuis R. Rodriguez BUG_ON(chan_idx >= sband->n_channels); 1213038659e7SLuis R. Rodriguez channel = &sband->channels[chan_idx]; 1214038659e7SLuis R. Rodriguez 1215038659e7SLuis R. Rodriguez if (is_ht40_not_allowed(channel)) { 1216038659e7SLuis R. Rodriguez channel->flags |= IEEE80211_CHAN_NO_HT40; 1217038659e7SLuis R. Rodriguez return; 1218038659e7SLuis R. Rodriguez } 1219038659e7SLuis R. Rodriguez 1220038659e7SLuis R. Rodriguez /* 1221038659e7SLuis R. Rodriguez * We need to ensure the extension channels exist to 1222038659e7SLuis R. Rodriguez * be able to use HT40- or HT40+, this finds them (or not) 1223038659e7SLuis R. Rodriguez */ 1224038659e7SLuis R. Rodriguez for (i = 0; i < sband->n_channels; i++) { 1225038659e7SLuis R. Rodriguez struct ieee80211_channel *c = &sband->channels[i]; 1226038659e7SLuis R. Rodriguez if (c->center_freq == (channel->center_freq - 20)) 1227038659e7SLuis R. Rodriguez channel_before = c; 1228038659e7SLuis R. Rodriguez if (c->center_freq == (channel->center_freq + 20)) 1229038659e7SLuis R. Rodriguez channel_after = c; 1230038659e7SLuis R. Rodriguez } 1231038659e7SLuis R. Rodriguez 1232038659e7SLuis R. Rodriguez /* 1233038659e7SLuis R. Rodriguez * Please note that this assumes target bandwidth is 20 MHz, 1234038659e7SLuis R. Rodriguez * if that ever changes we also need to change the below logic 1235038659e7SLuis R. Rodriguez * to include that as well. 1236038659e7SLuis R. Rodriguez */ 1237038659e7SLuis R. Rodriguez if (is_ht40_not_allowed(channel_before)) 1238689da1b3SLuis R. Rodriguez channel->flags |= IEEE80211_CHAN_NO_HT40MINUS; 1239038659e7SLuis R. Rodriguez else 1240689da1b3SLuis R. Rodriguez channel->flags &= ~IEEE80211_CHAN_NO_HT40MINUS; 1241038659e7SLuis R. Rodriguez 1242038659e7SLuis R. Rodriguez if (is_ht40_not_allowed(channel_after)) 1243689da1b3SLuis R. Rodriguez channel->flags |= IEEE80211_CHAN_NO_HT40PLUS; 1244038659e7SLuis R. Rodriguez else 1245689da1b3SLuis R. Rodriguez channel->flags &= ~IEEE80211_CHAN_NO_HT40PLUS; 1246038659e7SLuis R. Rodriguez } 1247038659e7SLuis R. Rodriguez 1248038659e7SLuis R. Rodriguez static void reg_process_ht_flags_band(struct wiphy *wiphy, 1249038659e7SLuis R. Rodriguez enum ieee80211_band band) 1250038659e7SLuis R. Rodriguez { 1251038659e7SLuis R. Rodriguez unsigned int i; 1252038659e7SLuis R. Rodriguez struct ieee80211_supported_band *sband; 1253038659e7SLuis R. Rodriguez 1254038659e7SLuis R. Rodriguez BUG_ON(!wiphy->bands[band]); 1255038659e7SLuis R. Rodriguez sband = wiphy->bands[band]; 1256038659e7SLuis R. Rodriguez 1257038659e7SLuis R. Rodriguez for (i = 0; i < sband->n_channels; i++) 1258038659e7SLuis R. Rodriguez reg_process_ht_flags_channel(wiphy, band, i); 1259038659e7SLuis R. Rodriguez } 1260038659e7SLuis R. Rodriguez 1261038659e7SLuis R. Rodriguez static void reg_process_ht_flags(struct wiphy *wiphy) 1262038659e7SLuis R. Rodriguez { 1263038659e7SLuis R. Rodriguez enum ieee80211_band band; 1264038659e7SLuis R. Rodriguez 1265038659e7SLuis R. Rodriguez if (!wiphy) 1266038659e7SLuis R. Rodriguez return; 1267038659e7SLuis R. Rodriguez 1268038659e7SLuis R. Rodriguez for (band = 0; band < IEEE80211_NUM_BANDS; band++) { 1269038659e7SLuis R. Rodriguez if (wiphy->bands[band]) 1270038659e7SLuis R. Rodriguez reg_process_ht_flags_band(wiphy, band); 1271038659e7SLuis R. Rodriguez } 1272038659e7SLuis R. Rodriguez 1273038659e7SLuis R. Rodriguez } 1274038659e7SLuis R. Rodriguez 12757db90f4aSLuis R. Rodriguez void wiphy_update_regulatory(struct wiphy *wiphy, 12767db90f4aSLuis R. Rodriguez enum nl80211_reg_initiator initiator) 12778318d78aSJohannes Berg { 12788318d78aSJohannes Berg enum ieee80211_band band; 1279d46e5b1dSLuis R. Rodriguez 12807db90f4aSLuis R. Rodriguez if (ignore_reg_update(wiphy, initiator)) 1281e38f8a7aSLuis R. Rodriguez goto out; 1282b2e1b302SLuis R. Rodriguez for (band = 0; band < IEEE80211_NUM_BANDS; band++) { 12838318d78aSJohannes Berg if (wiphy->bands[band]) 1284a92a3ce7SLuis R. Rodriguez handle_band(wiphy, band); 1285b2e1b302SLuis R. Rodriguez } 1286e38f8a7aSLuis R. Rodriguez out: 1287e38f8a7aSLuis R. Rodriguez reg_process_beacons(wiphy); 1288038659e7SLuis R. Rodriguez reg_process_ht_flags(wiphy); 1289b2e1b302SLuis R. Rodriguez if (wiphy->reg_notifier) 1290716f9392SLuis R. Rodriguez wiphy->reg_notifier(wiphy, last_request); 1291b2e1b302SLuis R. Rodriguez } 1292b2e1b302SLuis R. Rodriguez 12931fa25e41SLuis R. Rodriguez static void handle_channel_custom(struct wiphy *wiphy, 12941fa25e41SLuis R. Rodriguez enum ieee80211_band band, 12951fa25e41SLuis R. Rodriguez unsigned int chan_idx, 12961fa25e41SLuis R. Rodriguez const struct ieee80211_regdomain *regd) 12971fa25e41SLuis R. Rodriguez { 12981fa25e41SLuis R. Rodriguez int r; 1299038659e7SLuis R. Rodriguez u32 desired_bw_khz = MHZ_TO_KHZ(20); 1300038659e7SLuis R. Rodriguez u32 bw_flags = 0; 13011fa25e41SLuis R. Rodriguez const struct ieee80211_reg_rule *reg_rule = NULL; 13021fa25e41SLuis R. Rodriguez const struct ieee80211_power_rule *power_rule = NULL; 1303038659e7SLuis R. Rodriguez const struct ieee80211_freq_range *freq_range = NULL; 13041fa25e41SLuis R. Rodriguez struct ieee80211_supported_band *sband; 13051fa25e41SLuis R. Rodriguez struct ieee80211_channel *chan; 13061fa25e41SLuis R. Rodriguez 1307abc7381bSLuis R. Rodriguez assert_reg_lock(); 1308ac46d48eSLuis R. Rodriguez 13091fa25e41SLuis R. Rodriguez sband = wiphy->bands[band]; 13101fa25e41SLuis R. Rodriguez BUG_ON(chan_idx >= sband->n_channels); 13111fa25e41SLuis R. Rodriguez chan = &sband->channels[chan_idx]; 13121fa25e41SLuis R. Rodriguez 1313038659e7SLuis R. Rodriguez r = freq_reg_info_regd(wiphy, 1314038659e7SLuis R. Rodriguez MHZ_TO_KHZ(chan->center_freq), 1315038659e7SLuis R. Rodriguez desired_bw_khz, 1316038659e7SLuis R. Rodriguez ®_rule, 1317038659e7SLuis R. Rodriguez regd); 13181fa25e41SLuis R. Rodriguez 13191fa25e41SLuis R. Rodriguez if (r) { 13201fa25e41SLuis R. Rodriguez chan->flags = IEEE80211_CHAN_DISABLED; 13211fa25e41SLuis R. Rodriguez return; 13221fa25e41SLuis R. Rodriguez } 13231fa25e41SLuis R. Rodriguez 13241fa25e41SLuis R. Rodriguez power_rule = ®_rule->power_rule; 1325038659e7SLuis R. Rodriguez freq_range = ®_rule->freq_range; 13261fa25e41SLuis R. Rodriguez 1327038659e7SLuis R. Rodriguez if (freq_range->max_bandwidth_khz < MHZ_TO_KHZ(40)) 1328038659e7SLuis R. Rodriguez bw_flags = IEEE80211_CHAN_NO_HT40; 1329038659e7SLuis R. Rodriguez 1330038659e7SLuis R. Rodriguez chan->flags |= map_regdom_flags(reg_rule->flags) | bw_flags; 13311fa25e41SLuis R. Rodriguez chan->max_antenna_gain = (int) MBI_TO_DBI(power_rule->max_antenna_gain); 13321fa25e41SLuis R. Rodriguez chan->max_power = (int) MBM_TO_DBM(power_rule->max_eirp); 13331fa25e41SLuis R. Rodriguez } 13341fa25e41SLuis R. Rodriguez 13351fa25e41SLuis R. Rodriguez static void handle_band_custom(struct wiphy *wiphy, enum ieee80211_band band, 13361fa25e41SLuis R. Rodriguez const struct ieee80211_regdomain *regd) 13371fa25e41SLuis R. Rodriguez { 13381fa25e41SLuis R. Rodriguez unsigned int i; 13391fa25e41SLuis R. Rodriguez struct ieee80211_supported_band *sband; 13401fa25e41SLuis R. Rodriguez 13411fa25e41SLuis R. Rodriguez BUG_ON(!wiphy->bands[band]); 13421fa25e41SLuis R. Rodriguez sband = wiphy->bands[band]; 13431fa25e41SLuis R. Rodriguez 13441fa25e41SLuis R. Rodriguez for (i = 0; i < sband->n_channels; i++) 13451fa25e41SLuis R. Rodriguez handle_channel_custom(wiphy, band, i, regd); 13461fa25e41SLuis R. Rodriguez } 13471fa25e41SLuis R. Rodriguez 13481fa25e41SLuis R. Rodriguez /* Used by drivers prior to wiphy registration */ 13491fa25e41SLuis R. Rodriguez void wiphy_apply_custom_regulatory(struct wiphy *wiphy, 13501fa25e41SLuis R. Rodriguez const struct ieee80211_regdomain *regd) 13511fa25e41SLuis R. Rodriguez { 13521fa25e41SLuis R. Rodriguez enum ieee80211_band band; 1353bbcf3f02SLuis R. Rodriguez unsigned int bands_set = 0; 1354ac46d48eSLuis R. Rodriguez 1355abc7381bSLuis R. Rodriguez mutex_lock(®_mutex); 13561fa25e41SLuis R. Rodriguez for (band = 0; band < IEEE80211_NUM_BANDS; band++) { 1357bbcf3f02SLuis R. Rodriguez if (!wiphy->bands[band]) 1358bbcf3f02SLuis R. Rodriguez continue; 13591fa25e41SLuis R. Rodriguez handle_band_custom(wiphy, band, regd); 1360bbcf3f02SLuis R. Rodriguez bands_set++; 13611fa25e41SLuis R. Rodriguez } 1362abc7381bSLuis R. Rodriguez mutex_unlock(®_mutex); 1363bbcf3f02SLuis R. Rodriguez 1364bbcf3f02SLuis R. Rodriguez /* 1365bbcf3f02SLuis R. Rodriguez * no point in calling this if it won't have any effect 1366bbcf3f02SLuis R. Rodriguez * on your device's supportd bands. 1367bbcf3f02SLuis R. Rodriguez */ 1368bbcf3f02SLuis R. Rodriguez WARN_ON(!bands_set); 13691fa25e41SLuis R. Rodriguez } 13701fa25e41SLuis R. Rodriguez EXPORT_SYMBOL(wiphy_apply_custom_regulatory); 13711fa25e41SLuis R. Rodriguez 1372fb1fc7adSLuis R. Rodriguez /* 1373fb1fc7adSLuis R. Rodriguez * Return value which can be used by ignore_request() to indicate 1374fb1fc7adSLuis R. Rodriguez * it has been determined we should intersect two regulatory domains 1375fb1fc7adSLuis R. Rodriguez */ 13769c96477dSLuis R. Rodriguez #define REG_INTERSECT 1 13779c96477dSLuis R. Rodriguez 137884fa4f43SJohannes Berg /* This has the logic which determines when a new request 137984fa4f43SJohannes Berg * should be ignored. */ 13802f92cd2eSLuis R. Rodriguez static int ignore_request(struct wiphy *wiphy, 13812f92cd2eSLuis R. Rodriguez struct regulatory_request *pending_request) 138284fa4f43SJohannes Berg { 1383806a9e39SLuis R. Rodriguez struct wiphy *last_wiphy = NULL; 1384761cf7ecSLuis R. Rodriguez 1385761cf7ecSLuis R. Rodriguez assert_cfg80211_lock(); 1386761cf7ecSLuis R. Rodriguez 138784fa4f43SJohannes Berg /* All initial requests are respected */ 138884fa4f43SJohannes Berg if (!last_request) 138984fa4f43SJohannes Berg return 0; 139084fa4f43SJohannes Berg 13912f92cd2eSLuis R. Rodriguez switch (pending_request->initiator) { 13927db90f4aSLuis R. Rodriguez case NL80211_REGDOM_SET_BY_CORE: 1393ba25c141SLuis R. Rodriguez return -EINVAL; 13947db90f4aSLuis R. Rodriguez case NL80211_REGDOM_SET_BY_COUNTRY_IE: 1395806a9e39SLuis R. Rodriguez 1396806a9e39SLuis R. Rodriguez last_wiphy = wiphy_idx_to_wiphy(last_request->wiphy_idx); 1397806a9e39SLuis R. Rodriguez 13982f92cd2eSLuis R. Rodriguez if (unlikely(!is_an_alpha2(pending_request->alpha2))) 139984fa4f43SJohannes Berg return -EINVAL; 14007db90f4aSLuis R. Rodriguez if (last_request->initiator == 14017db90f4aSLuis R. Rodriguez NL80211_REGDOM_SET_BY_COUNTRY_IE) { 1402806a9e39SLuis R. Rodriguez if (last_wiphy != wiphy) { 140384fa4f43SJohannes Berg /* 140484fa4f43SJohannes Berg * Two cards with two APs claiming different 14051fe90b03SThadeu Lima de Souza Cascardo * Country IE alpha2s. We could 140684fa4f43SJohannes Berg * intersect them, but that seems unlikely 140784fa4f43SJohannes Berg * to be correct. Reject second one for now. 140884fa4f43SJohannes Berg */ 14092f92cd2eSLuis R. Rodriguez if (regdom_changes(pending_request->alpha2)) 141084fa4f43SJohannes Berg return -EOPNOTSUPP; 141184fa4f43SJohannes Berg return -EALREADY; 141284fa4f43SJohannes Berg } 1413fb1fc7adSLuis R. Rodriguez /* 1414fb1fc7adSLuis R. Rodriguez * Two consecutive Country IE hints on the same wiphy. 1415fb1fc7adSLuis R. Rodriguez * This should be picked up early by the driver/stack 1416fb1fc7adSLuis R. Rodriguez */ 14172f92cd2eSLuis R. Rodriguez if (WARN_ON(regdom_changes(pending_request->alpha2))) 141884fa4f43SJohannes Berg return 0; 141984fa4f43SJohannes Berg return -EALREADY; 142084fa4f43SJohannes Berg } 14213f2355cbSLuis R. Rodriguez return REG_INTERSECT; 14227db90f4aSLuis R. Rodriguez case NL80211_REGDOM_SET_BY_DRIVER: 14237db90f4aSLuis R. Rodriguez if (last_request->initiator == NL80211_REGDOM_SET_BY_CORE) { 14242f92cd2eSLuis R. Rodriguez if (regdom_changes(pending_request->alpha2)) 1425e74b1e7fSLuis R. Rodriguez return 0; 1426e74b1e7fSLuis R. Rodriguez return -EALREADY; 1427e74b1e7fSLuis R. Rodriguez } 1428fff32c04SLuis R. Rodriguez 1429fff32c04SLuis R. Rodriguez /* 1430fff32c04SLuis R. Rodriguez * This would happen if you unplug and plug your card 1431fff32c04SLuis R. Rodriguez * back in or if you add a new device for which the previously 1432fff32c04SLuis R. Rodriguez * loaded card also agrees on the regulatory domain. 1433fff32c04SLuis R. Rodriguez */ 14347db90f4aSLuis R. Rodriguez if (last_request->initiator == NL80211_REGDOM_SET_BY_DRIVER && 14352f92cd2eSLuis R. Rodriguez !regdom_changes(pending_request->alpha2)) 1436fff32c04SLuis R. Rodriguez return -EALREADY; 1437fff32c04SLuis R. Rodriguez 14383e0c3ff3SLuis R. Rodriguez return REG_INTERSECT; 14397db90f4aSLuis R. Rodriguez case NL80211_REGDOM_SET_BY_USER: 14407db90f4aSLuis R. Rodriguez if (last_request->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) 14419c96477dSLuis R. Rodriguez return REG_INTERSECT; 1442fb1fc7adSLuis R. Rodriguez /* 1443fb1fc7adSLuis R. Rodriguez * If the user knows better the user should set the regdom 1444fb1fc7adSLuis R. Rodriguez * to their country before the IE is picked up 1445fb1fc7adSLuis R. Rodriguez */ 14467db90f4aSLuis R. Rodriguez if (last_request->initiator == NL80211_REGDOM_SET_BY_USER && 14473f2355cbSLuis R. Rodriguez last_request->intersect) 14483f2355cbSLuis R. Rodriguez return -EOPNOTSUPP; 1449fb1fc7adSLuis R. Rodriguez /* 1450fb1fc7adSLuis R. Rodriguez * Process user requests only after previous user/driver/core 1451fb1fc7adSLuis R. Rodriguez * requests have been processed 1452fb1fc7adSLuis R. Rodriguez */ 14537db90f4aSLuis R. Rodriguez if (last_request->initiator == NL80211_REGDOM_SET_BY_CORE || 14547db90f4aSLuis R. Rodriguez last_request->initiator == NL80211_REGDOM_SET_BY_DRIVER || 14557db90f4aSLuis R. Rodriguez last_request->initiator == NL80211_REGDOM_SET_BY_USER) { 145669b1572bSLuis R. Rodriguez if (regdom_changes(last_request->alpha2)) 14575eebade6SLuis R. Rodriguez return -EAGAIN; 14585eebade6SLuis R. Rodriguez } 14595eebade6SLuis R. Rodriguez 1460baeb66feSJohn W. Linville if (!regdom_changes(pending_request->alpha2)) 1461e74b1e7fSLuis R. Rodriguez return -EALREADY; 1462e74b1e7fSLuis R. Rodriguez 146384fa4f43SJohannes Berg return 0; 146484fa4f43SJohannes Berg } 146584fa4f43SJohannes Berg 146684fa4f43SJohannes Berg return -EINVAL; 146784fa4f43SJohannes Berg } 146884fa4f43SJohannes Berg 1469d1c96a9aSLuis R. Rodriguez /** 1470d1c96a9aSLuis R. Rodriguez * __regulatory_hint - hint to the wireless core a regulatory domain 1471d1c96a9aSLuis R. Rodriguez * @wiphy: if the hint comes from country information from an AP, this 1472d1c96a9aSLuis R. Rodriguez * is required to be set to the wiphy that received the information 147328da32d7SLuis R. Rodriguez * @pending_request: the regulatory request currently being processed 1474d1c96a9aSLuis R. Rodriguez * 1475d1c96a9aSLuis R. Rodriguez * The Wireless subsystem can use this function to hint to the wireless core 147628da32d7SLuis R. Rodriguez * what it believes should be the current regulatory domain. 1477d1c96a9aSLuis R. Rodriguez * 1478d1c96a9aSLuis R. Rodriguez * Returns zero if all went fine, %-EALREADY if a regulatory domain had 1479d1c96a9aSLuis R. Rodriguez * already been set or other standard error codes. 1480d1c96a9aSLuis R. Rodriguez * 1481abc7381bSLuis R. Rodriguez * Caller must hold &cfg80211_mutex and ®_mutex 1482d1c96a9aSLuis R. Rodriguez */ 148328da32d7SLuis R. Rodriguez static int __regulatory_hint(struct wiphy *wiphy, 148428da32d7SLuis R. Rodriguez struct regulatory_request *pending_request) 1485b2e1b302SLuis R. Rodriguez { 14869c96477dSLuis R. Rodriguez bool intersect = false; 1487b2e1b302SLuis R. Rodriguez int r = 0; 1488b2e1b302SLuis R. Rodriguez 1489761cf7ecSLuis R. Rodriguez assert_cfg80211_lock(); 1490761cf7ecSLuis R. Rodriguez 14912f92cd2eSLuis R. Rodriguez r = ignore_request(wiphy, pending_request); 14929c96477dSLuis R. Rodriguez 14933e0c3ff3SLuis R. Rodriguez if (r == REG_INTERSECT) { 14947db90f4aSLuis R. Rodriguez if (pending_request->initiator == 14957db90f4aSLuis R. Rodriguez NL80211_REGDOM_SET_BY_DRIVER) { 14963e0c3ff3SLuis R. Rodriguez r = reg_copy_regd(&wiphy->regd, cfg80211_regdomain); 1497d951c1ddSLuis R. Rodriguez if (r) { 1498d951c1ddSLuis R. Rodriguez kfree(pending_request); 1499b2e1b302SLuis R. Rodriguez return r; 15003e0c3ff3SLuis R. Rodriguez } 1501d951c1ddSLuis R. Rodriguez } 15023e0c3ff3SLuis R. Rodriguez intersect = true; 15033e0c3ff3SLuis R. Rodriguez } else if (r) { 1504fb1fc7adSLuis R. Rodriguez /* 1505fb1fc7adSLuis R. Rodriguez * If the regulatory domain being requested by the 15063e0c3ff3SLuis R. Rodriguez * driver has already been set just copy it to the 1507fb1fc7adSLuis R. Rodriguez * wiphy 1508fb1fc7adSLuis R. Rodriguez */ 150928da32d7SLuis R. Rodriguez if (r == -EALREADY && 15107db90f4aSLuis R. Rodriguez pending_request->initiator == 15117db90f4aSLuis R. Rodriguez NL80211_REGDOM_SET_BY_DRIVER) { 15123e0c3ff3SLuis R. Rodriguez r = reg_copy_regd(&wiphy->regd, cfg80211_regdomain); 1513d951c1ddSLuis R. Rodriguez if (r) { 1514d951c1ddSLuis R. Rodriguez kfree(pending_request); 15153e0c3ff3SLuis R. Rodriguez return r; 1516d951c1ddSLuis R. Rodriguez } 15173e0c3ff3SLuis R. Rodriguez r = -EALREADY; 15183e0c3ff3SLuis R. Rodriguez goto new_request; 15193e0c3ff3SLuis R. Rodriguez } 1520d951c1ddSLuis R. Rodriguez kfree(pending_request); 15213e0c3ff3SLuis R. Rodriguez return r; 15223e0c3ff3SLuis R. Rodriguez } 1523b2e1b302SLuis R. Rodriguez 15243e0c3ff3SLuis R. Rodriguez new_request: 1525f6037d09SJohannes Berg kfree(last_request); 1526d951c1ddSLuis R. Rodriguez 1527d951c1ddSLuis R. Rodriguez last_request = pending_request; 1528d951c1ddSLuis R. Rodriguez last_request->intersect = intersect; 1529d951c1ddSLuis R. Rodriguez 1530d951c1ddSLuis R. Rodriguez pending_request = NULL; 15313e0c3ff3SLuis R. Rodriguez 15323e0c3ff3SLuis R. Rodriguez /* When r == REG_INTERSECT we do need to call CRDA */ 153373d54c9eSLuis R. Rodriguez if (r < 0) { 153473d54c9eSLuis R. Rodriguez /* 153573d54c9eSLuis R. Rodriguez * Since CRDA will not be called in this case as we already 153673d54c9eSLuis R. Rodriguez * have applied the requested regulatory domain before we just 153773d54c9eSLuis R. Rodriguez * inform userspace we have processed the request 153873d54c9eSLuis R. Rodriguez */ 153973d54c9eSLuis R. Rodriguez if (r == -EALREADY) 154073d54c9eSLuis R. Rodriguez nl80211_send_reg_change_event(last_request); 15413e0c3ff3SLuis R. Rodriguez return r; 154273d54c9eSLuis R. Rodriguez } 15433e0c3ff3SLuis R. Rodriguez 1544d951c1ddSLuis R. Rodriguez return call_crda(last_request->alpha2); 1545b2e1b302SLuis R. Rodriguez } 1546b2e1b302SLuis R. Rodriguez 154730a548c7SLuis R. Rodriguez /* This processes *all* regulatory hints */ 1548d951c1ddSLuis R. Rodriguez static void reg_process_hint(struct regulatory_request *reg_request) 1549fe33eb39SLuis R. Rodriguez { 1550fe33eb39SLuis R. Rodriguez int r = 0; 1551fe33eb39SLuis R. Rodriguez struct wiphy *wiphy = NULL; 1552fe33eb39SLuis R. Rodriguez 1553fe33eb39SLuis R. Rodriguez BUG_ON(!reg_request->alpha2); 1554fe33eb39SLuis R. Rodriguez 1555fe33eb39SLuis R. Rodriguez mutex_lock(&cfg80211_mutex); 1556abc7381bSLuis R. Rodriguez mutex_lock(®_mutex); 1557fe33eb39SLuis R. Rodriguez 1558fe33eb39SLuis R. Rodriguez if (wiphy_idx_valid(reg_request->wiphy_idx)) 1559fe33eb39SLuis R. Rodriguez wiphy = wiphy_idx_to_wiphy(reg_request->wiphy_idx); 1560fe33eb39SLuis R. Rodriguez 15617db90f4aSLuis R. Rodriguez if (reg_request->initiator == NL80211_REGDOM_SET_BY_DRIVER && 1562fe33eb39SLuis R. Rodriguez !wiphy) { 1563d951c1ddSLuis R. Rodriguez kfree(reg_request); 1564fe33eb39SLuis R. Rodriguez goto out; 1565fe33eb39SLuis R. Rodriguez } 1566fe33eb39SLuis R. Rodriguez 156728da32d7SLuis R. Rodriguez r = __regulatory_hint(wiphy, reg_request); 1568fe33eb39SLuis R. Rodriguez /* This is required so that the orig_* parameters are saved */ 15695be83de5SJohannes Berg if (r == -EALREADY && wiphy && 15705be83de5SJohannes Berg wiphy->flags & WIPHY_FLAG_STRICT_REGULATORY) 1571fe33eb39SLuis R. Rodriguez wiphy_update_regulatory(wiphy, reg_request->initiator); 1572fe33eb39SLuis R. Rodriguez out: 1573abc7381bSLuis R. Rodriguez mutex_unlock(®_mutex); 1574fe33eb39SLuis R. Rodriguez mutex_unlock(&cfg80211_mutex); 1575fe33eb39SLuis R. Rodriguez } 1576fe33eb39SLuis R. Rodriguez 15777db90f4aSLuis R. Rodriguez /* Processes regulatory hints, this is all the NL80211_REGDOM_SET_BY_* */ 1578fe33eb39SLuis R. Rodriguez static void reg_process_pending_hints(void) 1579fe33eb39SLuis R. Rodriguez { 1580fe33eb39SLuis R. Rodriguez struct regulatory_request *reg_request; 1581fe33eb39SLuis R. Rodriguez 1582fe33eb39SLuis R. Rodriguez spin_lock(®_requests_lock); 1583fe33eb39SLuis R. Rodriguez while (!list_empty(®_requests_list)) { 1584fe33eb39SLuis R. Rodriguez reg_request = list_first_entry(®_requests_list, 1585fe33eb39SLuis R. Rodriguez struct regulatory_request, 1586fe33eb39SLuis R. Rodriguez list); 1587fe33eb39SLuis R. Rodriguez list_del_init(®_request->list); 1588fe33eb39SLuis R. Rodriguez 1589d951c1ddSLuis R. Rodriguez spin_unlock(®_requests_lock); 1590d951c1ddSLuis R. Rodriguez reg_process_hint(reg_request); 1591fe33eb39SLuis R. Rodriguez spin_lock(®_requests_lock); 1592fe33eb39SLuis R. Rodriguez } 1593fe33eb39SLuis R. Rodriguez spin_unlock(®_requests_lock); 1594fe33eb39SLuis R. Rodriguez } 1595fe33eb39SLuis R. Rodriguez 1596e38f8a7aSLuis R. Rodriguez /* Processes beacon hints -- this has nothing to do with country IEs */ 1597e38f8a7aSLuis R. Rodriguez static void reg_process_pending_beacon_hints(void) 1598e38f8a7aSLuis R. Rodriguez { 159979c97e97SJohannes Berg struct cfg80211_registered_device *rdev; 1600e38f8a7aSLuis R. Rodriguez struct reg_beacon *pending_beacon, *tmp; 1601e38f8a7aSLuis R. Rodriguez 1602abc7381bSLuis R. Rodriguez /* 1603abc7381bSLuis R. Rodriguez * No need to hold the reg_mutex here as we just touch wiphys 1604abc7381bSLuis R. Rodriguez * and do not read or access regulatory variables. 1605abc7381bSLuis R. Rodriguez */ 1606e38f8a7aSLuis R. Rodriguez mutex_lock(&cfg80211_mutex); 1607e38f8a7aSLuis R. Rodriguez 1608e38f8a7aSLuis R. Rodriguez /* This goes through the _pending_ beacon list */ 1609e38f8a7aSLuis R. Rodriguez spin_lock_bh(®_pending_beacons_lock); 1610e38f8a7aSLuis R. Rodriguez 1611e38f8a7aSLuis R. Rodriguez if (list_empty(®_pending_beacons)) { 1612e38f8a7aSLuis R. Rodriguez spin_unlock_bh(®_pending_beacons_lock); 1613e38f8a7aSLuis R. Rodriguez goto out; 1614e38f8a7aSLuis R. Rodriguez } 1615e38f8a7aSLuis R. Rodriguez 1616e38f8a7aSLuis R. Rodriguez list_for_each_entry_safe(pending_beacon, tmp, 1617e38f8a7aSLuis R. Rodriguez ®_pending_beacons, list) { 1618e38f8a7aSLuis R. Rodriguez 1619e38f8a7aSLuis R. Rodriguez list_del_init(&pending_beacon->list); 1620e38f8a7aSLuis R. Rodriguez 1621e38f8a7aSLuis R. Rodriguez /* Applies the beacon hint to current wiphys */ 162279c97e97SJohannes Berg list_for_each_entry(rdev, &cfg80211_rdev_list, list) 162379c97e97SJohannes Berg wiphy_update_new_beacon(&rdev->wiphy, pending_beacon); 1624e38f8a7aSLuis R. Rodriguez 1625e38f8a7aSLuis R. Rodriguez /* Remembers the beacon hint for new wiphys or reg changes */ 1626e38f8a7aSLuis R. Rodriguez list_add_tail(&pending_beacon->list, ®_beacon_list); 1627e38f8a7aSLuis R. Rodriguez } 1628e38f8a7aSLuis R. Rodriguez 1629e38f8a7aSLuis R. Rodriguez spin_unlock_bh(®_pending_beacons_lock); 1630e38f8a7aSLuis R. Rodriguez out: 1631e38f8a7aSLuis R. Rodriguez mutex_unlock(&cfg80211_mutex); 1632e38f8a7aSLuis R. Rodriguez } 1633e38f8a7aSLuis R. Rodriguez 1634fe33eb39SLuis R. Rodriguez static void reg_todo(struct work_struct *work) 1635fe33eb39SLuis R. Rodriguez { 1636fe33eb39SLuis R. Rodriguez reg_process_pending_hints(); 1637e38f8a7aSLuis R. Rodriguez reg_process_pending_beacon_hints(); 1638fe33eb39SLuis R. Rodriguez } 1639fe33eb39SLuis R. Rodriguez 1640fe33eb39SLuis R. Rodriguez static DECLARE_WORK(reg_work, reg_todo); 1641fe33eb39SLuis R. Rodriguez 1642fe33eb39SLuis R. Rodriguez static void queue_regulatory_request(struct regulatory_request *request) 1643fe33eb39SLuis R. Rodriguez { 1644fe33eb39SLuis R. Rodriguez spin_lock(®_requests_lock); 1645fe33eb39SLuis R. Rodriguez list_add_tail(&request->list, ®_requests_list); 1646fe33eb39SLuis R. Rodriguez spin_unlock(®_requests_lock); 1647fe33eb39SLuis R. Rodriguez 1648fe33eb39SLuis R. Rodriguez schedule_work(®_work); 1649fe33eb39SLuis R. Rodriguez } 1650fe33eb39SLuis R. Rodriguez 1651fe33eb39SLuis R. Rodriguez /* Core regulatory hint -- happens once during cfg80211_init() */ 1652ba25c141SLuis R. Rodriguez static int regulatory_hint_core(const char *alpha2) 1653ba25c141SLuis R. Rodriguez { 1654ba25c141SLuis R. Rodriguez struct regulatory_request *request; 1655ba25c141SLuis R. Rodriguez 1656ba25c141SLuis R. Rodriguez BUG_ON(last_request); 1657ba25c141SLuis R. Rodriguez 1658ba25c141SLuis R. Rodriguez request = kzalloc(sizeof(struct regulatory_request), 1659ba25c141SLuis R. Rodriguez GFP_KERNEL); 1660ba25c141SLuis R. Rodriguez if (!request) 1661ba25c141SLuis R. Rodriguez return -ENOMEM; 1662ba25c141SLuis R. Rodriguez 1663ba25c141SLuis R. Rodriguez request->alpha2[0] = alpha2[0]; 1664ba25c141SLuis R. Rodriguez request->alpha2[1] = alpha2[1]; 16657db90f4aSLuis R. Rodriguez request->initiator = NL80211_REGDOM_SET_BY_CORE; 1666ba25c141SLuis R. Rodriguez 1667fe33eb39SLuis R. Rodriguez queue_regulatory_request(request); 1668ba25c141SLuis R. Rodriguez 16695078b2e3SLuis R. Rodriguez /* 16705078b2e3SLuis R. Rodriguez * This ensures last_request is populated once modules 16715078b2e3SLuis R. Rodriguez * come swinging in and calling regulatory hints and 16725078b2e3SLuis R. Rodriguez * wiphy_apply_custom_regulatory(). 16735078b2e3SLuis R. Rodriguez */ 16745078b2e3SLuis R. Rodriguez flush_scheduled_work(); 16755078b2e3SLuis R. Rodriguez 1676fe33eb39SLuis R. Rodriguez return 0; 1677ba25c141SLuis R. Rodriguez } 1678ba25c141SLuis R. Rodriguez 1679fe33eb39SLuis R. Rodriguez /* User hints */ 1680fe33eb39SLuis R. Rodriguez int regulatory_hint_user(const char *alpha2) 1681b2e1b302SLuis R. Rodriguez { 1682fe33eb39SLuis R. Rodriguez struct regulatory_request *request; 1683fe33eb39SLuis R. Rodriguez 1684be3d4810SJohannes Berg BUG_ON(!alpha2); 1685b2e1b302SLuis R. Rodriguez 1686fe33eb39SLuis R. Rodriguez request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); 1687fe33eb39SLuis R. Rodriguez if (!request) 1688fe33eb39SLuis R. Rodriguez return -ENOMEM; 1689fe33eb39SLuis R. Rodriguez 1690fe33eb39SLuis R. Rodriguez request->wiphy_idx = WIPHY_IDX_STALE; 1691fe33eb39SLuis R. Rodriguez request->alpha2[0] = alpha2[0]; 1692fe33eb39SLuis R. Rodriguez request->alpha2[1] = alpha2[1]; 16937db90f4aSLuis R. Rodriguez request->initiator = NL80211_REGDOM_SET_BY_USER, 1694fe33eb39SLuis R. Rodriguez 1695fe33eb39SLuis R. Rodriguez queue_regulatory_request(request); 1696fe33eb39SLuis R. Rodriguez 1697fe33eb39SLuis R. Rodriguez return 0; 1698fe33eb39SLuis R. Rodriguez } 1699fe33eb39SLuis R. Rodriguez 1700fe33eb39SLuis R. Rodriguez /* Driver hints */ 1701fe33eb39SLuis R. Rodriguez int regulatory_hint(struct wiphy *wiphy, const char *alpha2) 1702fe33eb39SLuis R. Rodriguez { 1703fe33eb39SLuis R. Rodriguez struct regulatory_request *request; 1704fe33eb39SLuis R. Rodriguez 1705fe33eb39SLuis R. Rodriguez BUG_ON(!alpha2); 1706fe33eb39SLuis R. Rodriguez BUG_ON(!wiphy); 1707fe33eb39SLuis R. Rodriguez 1708fe33eb39SLuis R. Rodriguez request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); 1709fe33eb39SLuis R. Rodriguez if (!request) 1710fe33eb39SLuis R. Rodriguez return -ENOMEM; 1711fe33eb39SLuis R. Rodriguez 1712fe33eb39SLuis R. Rodriguez request->wiphy_idx = get_wiphy_idx(wiphy); 1713fe33eb39SLuis R. Rodriguez 1714fe33eb39SLuis R. Rodriguez /* Must have registered wiphy first */ 1715fe33eb39SLuis R. Rodriguez BUG_ON(!wiphy_idx_valid(request->wiphy_idx)); 1716fe33eb39SLuis R. Rodriguez 1717fe33eb39SLuis R. Rodriguez request->alpha2[0] = alpha2[0]; 1718fe33eb39SLuis R. Rodriguez request->alpha2[1] = alpha2[1]; 17197db90f4aSLuis R. Rodriguez request->initiator = NL80211_REGDOM_SET_BY_DRIVER; 1720fe33eb39SLuis R. Rodriguez 1721fe33eb39SLuis R. Rodriguez queue_regulatory_request(request); 1722fe33eb39SLuis R. Rodriguez 1723fe33eb39SLuis R. Rodriguez return 0; 1724b2e1b302SLuis R. Rodriguez } 1725b2e1b302SLuis R. Rodriguez EXPORT_SYMBOL(regulatory_hint); 1726b2e1b302SLuis R. Rodriguez 1727abc7381bSLuis R. Rodriguez /* Caller must hold reg_mutex */ 17283f2355cbSLuis R. Rodriguez static bool reg_same_country_ie_hint(struct wiphy *wiphy, 17293f2355cbSLuis R. Rodriguez u32 country_ie_checksum) 17303f2355cbSLuis R. Rodriguez { 1731806a9e39SLuis R. Rodriguez struct wiphy *request_wiphy; 1732806a9e39SLuis R. Rodriguez 1733abc7381bSLuis R. Rodriguez assert_reg_lock(); 1734761cf7ecSLuis R. Rodriguez 1735cc0b6fe8SLuis R. Rodriguez if (unlikely(last_request->initiator != 1736cc0b6fe8SLuis R. Rodriguez NL80211_REGDOM_SET_BY_COUNTRY_IE)) 1737cc0b6fe8SLuis R. Rodriguez return false; 1738cc0b6fe8SLuis R. Rodriguez 1739806a9e39SLuis R. Rodriguez request_wiphy = wiphy_idx_to_wiphy(last_request->wiphy_idx); 1740806a9e39SLuis R. Rodriguez 1741806a9e39SLuis R. Rodriguez if (!request_wiphy) 17423f2355cbSLuis R. Rodriguez return false; 1743806a9e39SLuis R. Rodriguez 1744806a9e39SLuis R. Rodriguez if (likely(request_wiphy != wiphy)) 17453f2355cbSLuis R. Rodriguez return !country_ie_integrity_changes(country_ie_checksum); 1746fb1fc7adSLuis R. Rodriguez /* 1747fb1fc7adSLuis R. Rodriguez * We should not have let these through at this point, they 17483f2355cbSLuis R. Rodriguez * should have been picked up earlier by the first alpha2 check 1749fb1fc7adSLuis R. Rodriguez * on the device 1750fb1fc7adSLuis R. Rodriguez */ 17513f2355cbSLuis R. Rodriguez if (WARN_ON(!country_ie_integrity_changes(country_ie_checksum))) 17523f2355cbSLuis R. Rodriguez return true; 17533f2355cbSLuis R. Rodriguez return false; 17543f2355cbSLuis R. Rodriguez } 17553f2355cbSLuis R. Rodriguez 17564b44c8bcSLuis R. Rodriguez /* 17574b44c8bcSLuis R. Rodriguez * We hold wdev_lock() here so we cannot hold cfg80211_mutex() and 17584b44c8bcSLuis R. Rodriguez * therefore cannot iterate over the rdev list here. 17594b44c8bcSLuis R. Rodriguez */ 17603f2355cbSLuis R. Rodriguez void regulatory_hint_11d(struct wiphy *wiphy, 17613f2355cbSLuis R. Rodriguez u8 *country_ie, 17623f2355cbSLuis R. Rodriguez u8 country_ie_len) 17633f2355cbSLuis R. Rodriguez { 17643f2355cbSLuis R. Rodriguez struct ieee80211_regdomain *rd = NULL; 17653f2355cbSLuis R. Rodriguez char alpha2[2]; 17663f2355cbSLuis R. Rodriguez u32 checksum = 0; 17673f2355cbSLuis R. Rodriguez enum environment_cap env = ENVIRON_ANY; 1768fe33eb39SLuis R. Rodriguez struct regulatory_request *request; 17693f2355cbSLuis R. Rodriguez 1770abc7381bSLuis R. Rodriguez mutex_lock(®_mutex); 17713f2355cbSLuis R. Rodriguez 17729828b017SLuis R. Rodriguez if (unlikely(!last_request)) 17739828b017SLuis R. Rodriguez goto out; 1774d335fe63SLuis R. Rodriguez 17753f2355cbSLuis R. Rodriguez /* IE len must be evenly divisible by 2 */ 17763f2355cbSLuis R. Rodriguez if (country_ie_len & 0x01) 17773f2355cbSLuis R. Rodriguez goto out; 17783f2355cbSLuis R. Rodriguez 17793f2355cbSLuis R. Rodriguez if (country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN) 17803f2355cbSLuis R. Rodriguez goto out; 17813f2355cbSLuis R. Rodriguez 1782fb1fc7adSLuis R. Rodriguez /* 1783fb1fc7adSLuis R. Rodriguez * Pending country IE processing, this can happen after we 17843f2355cbSLuis R. Rodriguez * call CRDA and wait for a response if a beacon was received before 1785fb1fc7adSLuis R. Rodriguez * we were able to process the last regulatory_hint_11d() call 1786fb1fc7adSLuis R. Rodriguez */ 17873f2355cbSLuis R. Rodriguez if (country_ie_regdomain) 17883f2355cbSLuis R. Rodriguez goto out; 17893f2355cbSLuis R. Rodriguez 17903f2355cbSLuis R. Rodriguez alpha2[0] = country_ie[0]; 17913f2355cbSLuis R. Rodriguez alpha2[1] = country_ie[1]; 17923f2355cbSLuis R. Rodriguez 17933f2355cbSLuis R. Rodriguez if (country_ie[2] == 'I') 17943f2355cbSLuis R. Rodriguez env = ENVIRON_INDOOR; 17953f2355cbSLuis R. Rodriguez else if (country_ie[2] == 'O') 17963f2355cbSLuis R. Rodriguez env = ENVIRON_OUTDOOR; 17973f2355cbSLuis R. Rodriguez 1798fb1fc7adSLuis R. Rodriguez /* 17998b19e6caSLuis R. Rodriguez * We will run this only upon a successful connection on cfg80211. 18004b44c8bcSLuis R. Rodriguez * We leave conflict resolution to the workqueue, where can hold 18014b44c8bcSLuis R. Rodriguez * cfg80211_mutex. 1802fb1fc7adSLuis R. Rodriguez */ 1803cc0b6fe8SLuis R. Rodriguez if (likely(last_request->initiator == 1804cc0b6fe8SLuis R. Rodriguez NL80211_REGDOM_SET_BY_COUNTRY_IE && 18054b44c8bcSLuis R. Rodriguez wiphy_idx_valid(last_request->wiphy_idx))) 18063f2355cbSLuis R. Rodriguez goto out; 18073f2355cbSLuis R. Rodriguez 18083f2355cbSLuis R. Rodriguez rd = country_ie_2_rd(country_ie, country_ie_len, &checksum); 18093f2355cbSLuis R. Rodriguez if (!rd) 18103f2355cbSLuis R. Rodriguez goto out; 18113f2355cbSLuis R. Rodriguez 1812915278e0SLuis R. Rodriguez /* 1813915278e0SLuis R. Rodriguez * This will not happen right now but we leave it here for the 18143f2355cbSLuis R. Rodriguez * the future when we want to add suspend/resume support and having 18153f2355cbSLuis R. Rodriguez * the user move to another country after doing so, or having the user 1816915278e0SLuis R. Rodriguez * move to another AP. Right now we just trust the first AP. 1817915278e0SLuis R. Rodriguez * 1818915278e0SLuis R. Rodriguez * If we hit this before we add this support we want to be informed of 1819915278e0SLuis R. Rodriguez * it as it would indicate a mistake in the current design 1820915278e0SLuis R. Rodriguez */ 1821915278e0SLuis R. Rodriguez if (WARN_ON(reg_same_country_ie_hint(wiphy, checksum))) 18220441d6ffSLuis R. Rodriguez goto free_rd_out; 18233f2355cbSLuis R. Rodriguez 1824fe33eb39SLuis R. Rodriguez request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); 1825fe33eb39SLuis R. Rodriguez if (!request) 1826fe33eb39SLuis R. Rodriguez goto free_rd_out; 1827fe33eb39SLuis R. Rodriguez 1828fb1fc7adSLuis R. Rodriguez /* 1829fb1fc7adSLuis R. Rodriguez * We keep this around for when CRDA comes back with a response so 1830fb1fc7adSLuis R. Rodriguez * we can intersect with that 1831fb1fc7adSLuis R. Rodriguez */ 18323f2355cbSLuis R. Rodriguez country_ie_regdomain = rd; 18333f2355cbSLuis R. Rodriguez 1834fe33eb39SLuis R. Rodriguez request->wiphy_idx = get_wiphy_idx(wiphy); 1835fe33eb39SLuis R. Rodriguez request->alpha2[0] = rd->alpha2[0]; 1836fe33eb39SLuis R. Rodriguez request->alpha2[1] = rd->alpha2[1]; 18377db90f4aSLuis R. Rodriguez request->initiator = NL80211_REGDOM_SET_BY_COUNTRY_IE; 1838fe33eb39SLuis R. Rodriguez request->country_ie_checksum = checksum; 1839fe33eb39SLuis R. Rodriguez request->country_ie_env = env; 18403f2355cbSLuis R. Rodriguez 1841abc7381bSLuis R. Rodriguez mutex_unlock(®_mutex); 1842fe33eb39SLuis R. Rodriguez 1843fe33eb39SLuis R. Rodriguez queue_regulatory_request(request); 1844fe33eb39SLuis R. Rodriguez 1845fe33eb39SLuis R. Rodriguez return; 18460441d6ffSLuis R. Rodriguez 18470441d6ffSLuis R. Rodriguez free_rd_out: 18480441d6ffSLuis R. Rodriguez kfree(rd); 18493f2355cbSLuis R. Rodriguez out: 1850abc7381bSLuis R. Rodriguez mutex_unlock(®_mutex); 18513f2355cbSLuis R. Rodriguez } 1852b2e1b302SLuis R. Rodriguez 1853e38f8a7aSLuis R. Rodriguez static bool freq_is_chan_12_13_14(u16 freq) 1854e38f8a7aSLuis R. Rodriguez { 1855e38f8a7aSLuis R. Rodriguez if (freq == ieee80211_channel_to_frequency(12) || 1856e38f8a7aSLuis R. Rodriguez freq == ieee80211_channel_to_frequency(13) || 1857e38f8a7aSLuis R. Rodriguez freq == ieee80211_channel_to_frequency(14)) 1858e38f8a7aSLuis R. Rodriguez return true; 1859e38f8a7aSLuis R. Rodriguez return false; 1860e38f8a7aSLuis R. Rodriguez } 1861e38f8a7aSLuis R. Rodriguez 1862e38f8a7aSLuis R. Rodriguez int regulatory_hint_found_beacon(struct wiphy *wiphy, 1863e38f8a7aSLuis R. Rodriguez struct ieee80211_channel *beacon_chan, 1864e38f8a7aSLuis R. Rodriguez gfp_t gfp) 1865e38f8a7aSLuis R. Rodriguez { 1866e38f8a7aSLuis R. Rodriguez struct reg_beacon *reg_beacon; 1867e38f8a7aSLuis R. Rodriguez 1868e38f8a7aSLuis R. Rodriguez if (likely((beacon_chan->beacon_found || 1869e38f8a7aSLuis R. Rodriguez (beacon_chan->flags & IEEE80211_CHAN_RADAR) || 1870e38f8a7aSLuis R. Rodriguez (beacon_chan->band == IEEE80211_BAND_2GHZ && 1871e38f8a7aSLuis R. Rodriguez !freq_is_chan_12_13_14(beacon_chan->center_freq))))) 1872e38f8a7aSLuis R. Rodriguez return 0; 1873e38f8a7aSLuis R. Rodriguez 1874e38f8a7aSLuis R. Rodriguez reg_beacon = kzalloc(sizeof(struct reg_beacon), gfp); 1875e38f8a7aSLuis R. Rodriguez if (!reg_beacon) 1876e38f8a7aSLuis R. Rodriguez return -ENOMEM; 1877e38f8a7aSLuis R. Rodriguez 18784113f751SLuis R. Rodriguez REG_DBG_PRINT("cfg80211: Found new beacon on " 1879e38f8a7aSLuis R. Rodriguez "frequency: %d MHz (Ch %d) on %s\n", 1880e38f8a7aSLuis R. Rodriguez beacon_chan->center_freq, 1881e38f8a7aSLuis R. Rodriguez ieee80211_frequency_to_channel(beacon_chan->center_freq), 1882e38f8a7aSLuis R. Rodriguez wiphy_name(wiphy)); 18834113f751SLuis R. Rodriguez 1884e38f8a7aSLuis R. Rodriguez memcpy(®_beacon->chan, beacon_chan, 1885e38f8a7aSLuis R. Rodriguez sizeof(struct ieee80211_channel)); 1886e38f8a7aSLuis R. Rodriguez 1887e38f8a7aSLuis R. Rodriguez 1888e38f8a7aSLuis R. Rodriguez /* 1889e38f8a7aSLuis R. Rodriguez * Since we can be called from BH or and non-BH context 1890e38f8a7aSLuis R. Rodriguez * we must use spin_lock_bh() 1891e38f8a7aSLuis R. Rodriguez */ 1892e38f8a7aSLuis R. Rodriguez spin_lock_bh(®_pending_beacons_lock); 1893e38f8a7aSLuis R. Rodriguez list_add_tail(®_beacon->list, ®_pending_beacons); 1894e38f8a7aSLuis R. Rodriguez spin_unlock_bh(®_pending_beacons_lock); 1895e38f8a7aSLuis R. Rodriguez 1896e38f8a7aSLuis R. Rodriguez schedule_work(®_work); 1897e38f8a7aSLuis R. Rodriguez 1898e38f8a7aSLuis R. Rodriguez return 0; 1899e38f8a7aSLuis R. Rodriguez } 1900e38f8a7aSLuis R. Rodriguez 1901a3d2eaf0SJohannes Berg static void print_rd_rules(const struct ieee80211_regdomain *rd) 1902b2e1b302SLuis R. Rodriguez { 1903b2e1b302SLuis R. Rodriguez unsigned int i; 1904a3d2eaf0SJohannes Berg const struct ieee80211_reg_rule *reg_rule = NULL; 1905a3d2eaf0SJohannes Berg const struct ieee80211_freq_range *freq_range = NULL; 1906a3d2eaf0SJohannes Berg const struct ieee80211_power_rule *power_rule = NULL; 1907b2e1b302SLuis R. Rodriguez 1908269ac5fdSKalle Valo printk(KERN_INFO " (start_freq - end_freq @ bandwidth), " 1909b2e1b302SLuis R. Rodriguez "(max_antenna_gain, max_eirp)\n"); 1910b2e1b302SLuis R. Rodriguez 1911b2e1b302SLuis R. Rodriguez for (i = 0; i < rd->n_reg_rules; i++) { 1912b2e1b302SLuis R. Rodriguez reg_rule = &rd->reg_rules[i]; 1913b2e1b302SLuis R. Rodriguez freq_range = ®_rule->freq_range; 1914b2e1b302SLuis R. Rodriguez power_rule = ®_rule->power_rule; 1915b2e1b302SLuis R. Rodriguez 1916fb1fc7adSLuis R. Rodriguez /* 1917fb1fc7adSLuis R. Rodriguez * There may not be documentation for max antenna gain 1918fb1fc7adSLuis R. Rodriguez * in certain regions 1919fb1fc7adSLuis R. Rodriguez */ 1920b2e1b302SLuis R. Rodriguez if (power_rule->max_antenna_gain) 1921269ac5fdSKalle Valo printk(KERN_INFO " (%d KHz - %d KHz @ %d KHz), " 1922b2e1b302SLuis R. Rodriguez "(%d mBi, %d mBm)\n", 1923b2e1b302SLuis R. Rodriguez freq_range->start_freq_khz, 1924b2e1b302SLuis R. Rodriguez freq_range->end_freq_khz, 1925b2e1b302SLuis R. Rodriguez freq_range->max_bandwidth_khz, 1926b2e1b302SLuis R. Rodriguez power_rule->max_antenna_gain, 1927b2e1b302SLuis R. Rodriguez power_rule->max_eirp); 1928b2e1b302SLuis R. Rodriguez else 1929269ac5fdSKalle Valo printk(KERN_INFO " (%d KHz - %d KHz @ %d KHz), " 1930b2e1b302SLuis R. Rodriguez "(N/A, %d mBm)\n", 1931b2e1b302SLuis R. Rodriguez freq_range->start_freq_khz, 1932b2e1b302SLuis R. Rodriguez freq_range->end_freq_khz, 1933b2e1b302SLuis R. Rodriguez freq_range->max_bandwidth_khz, 1934b2e1b302SLuis R. Rodriguez power_rule->max_eirp); 1935b2e1b302SLuis R. Rodriguez } 1936b2e1b302SLuis R. Rodriguez } 1937b2e1b302SLuis R. Rodriguez 1938a3d2eaf0SJohannes Berg static void print_regdomain(const struct ieee80211_regdomain *rd) 1939b2e1b302SLuis R. Rodriguez { 1940b2e1b302SLuis R. Rodriguez 19413f2355cbSLuis R. Rodriguez if (is_intersected_alpha2(rd->alpha2)) { 19423f2355cbSLuis R. Rodriguez 19437db90f4aSLuis R. Rodriguez if (last_request->initiator == 19447db90f4aSLuis R. Rodriguez NL80211_REGDOM_SET_BY_COUNTRY_IE) { 194579c97e97SJohannes Berg struct cfg80211_registered_device *rdev; 194679c97e97SJohannes Berg rdev = cfg80211_rdev_by_wiphy_idx( 1947806a9e39SLuis R. Rodriguez last_request->wiphy_idx); 194879c97e97SJohannes Berg if (rdev) { 19493f2355cbSLuis R. Rodriguez printk(KERN_INFO "cfg80211: Current regulatory " 19503f2355cbSLuis R. Rodriguez "domain updated by AP to: %c%c\n", 195179c97e97SJohannes Berg rdev->country_ie_alpha2[0], 195279c97e97SJohannes Berg rdev->country_ie_alpha2[1]); 19533f2355cbSLuis R. Rodriguez } else 19543f2355cbSLuis R. Rodriguez printk(KERN_INFO "cfg80211: Current regulatory " 19553f2355cbSLuis R. Rodriguez "domain intersected: \n"); 19563f2355cbSLuis R. Rodriguez } else 19573f2355cbSLuis R. Rodriguez printk(KERN_INFO "cfg80211: Current regulatory " 1958039498c6SLuis R. Rodriguez "domain intersected: \n"); 19593f2355cbSLuis R. Rodriguez } else if (is_world_regdom(rd->alpha2)) 1960b2e1b302SLuis R. Rodriguez printk(KERN_INFO "cfg80211: World regulatory " 1961b2e1b302SLuis R. Rodriguez "domain updated:\n"); 1962b2e1b302SLuis R. Rodriguez else { 1963b2e1b302SLuis R. Rodriguez if (is_unknown_alpha2(rd->alpha2)) 1964b2e1b302SLuis R. Rodriguez printk(KERN_INFO "cfg80211: Regulatory domain " 1965b2e1b302SLuis R. Rodriguez "changed to driver built-in settings " 1966b2e1b302SLuis R. Rodriguez "(unknown country)\n"); 1967b2e1b302SLuis R. Rodriguez else 1968b2e1b302SLuis R. Rodriguez printk(KERN_INFO "cfg80211: Regulatory domain " 1969b2e1b302SLuis R. Rodriguez "changed to country: %c%c\n", 1970b2e1b302SLuis R. Rodriguez rd->alpha2[0], rd->alpha2[1]); 1971b2e1b302SLuis R. Rodriguez } 1972b2e1b302SLuis R. Rodriguez print_rd_rules(rd); 1973b2e1b302SLuis R. Rodriguez } 1974b2e1b302SLuis R. Rodriguez 19752df78167SJohannes Berg static void print_regdomain_info(const struct ieee80211_regdomain *rd) 1976b2e1b302SLuis R. Rodriguez { 1977b2e1b302SLuis R. Rodriguez printk(KERN_INFO "cfg80211: Regulatory domain: %c%c\n", 1978b2e1b302SLuis R. Rodriguez rd->alpha2[0], rd->alpha2[1]); 1979b2e1b302SLuis R. Rodriguez print_rd_rules(rd); 1980b2e1b302SLuis R. Rodriguez } 1981b2e1b302SLuis R. Rodriguez 19823f2355cbSLuis R. Rodriguez #ifdef CONFIG_CFG80211_REG_DEBUG 19833f2355cbSLuis R. Rodriguez static void reg_country_ie_process_debug( 19843f2355cbSLuis R. Rodriguez const struct ieee80211_regdomain *rd, 19853f2355cbSLuis R. Rodriguez const struct ieee80211_regdomain *country_ie_regdomain, 19863f2355cbSLuis R. Rodriguez const struct ieee80211_regdomain *intersected_rd) 19873f2355cbSLuis R. Rodriguez { 19883f2355cbSLuis R. Rodriguez printk(KERN_DEBUG "cfg80211: Received country IE:\n"); 19893f2355cbSLuis R. Rodriguez print_regdomain_info(country_ie_regdomain); 19903f2355cbSLuis R. Rodriguez printk(KERN_DEBUG "cfg80211: CRDA thinks this should applied:\n"); 19913f2355cbSLuis R. Rodriguez print_regdomain_info(rd); 19923f2355cbSLuis R. Rodriguez if (intersected_rd) { 19933f2355cbSLuis R. Rodriguez printk(KERN_DEBUG "cfg80211: We intersect both of these " 19943f2355cbSLuis R. Rodriguez "and get:\n"); 1995667ecd01SLuis R. Rodriguez print_regdomain_info(intersected_rd); 19963f2355cbSLuis R. Rodriguez return; 19973f2355cbSLuis R. Rodriguez } 19983f2355cbSLuis R. Rodriguez printk(KERN_DEBUG "cfg80211: Intersection between both failed\n"); 19993f2355cbSLuis R. Rodriguez } 20003f2355cbSLuis R. Rodriguez #else 20013f2355cbSLuis R. Rodriguez static inline void reg_country_ie_process_debug( 20023f2355cbSLuis R. Rodriguez const struct ieee80211_regdomain *rd, 20033f2355cbSLuis R. Rodriguez const struct ieee80211_regdomain *country_ie_regdomain, 20043f2355cbSLuis R. Rodriguez const struct ieee80211_regdomain *intersected_rd) 20053f2355cbSLuis R. Rodriguez { 20063f2355cbSLuis R. Rodriguez } 20073f2355cbSLuis R. Rodriguez #endif 20083f2355cbSLuis R. Rodriguez 2009d2372b31SJohannes Berg /* Takes ownership of rd only if it doesn't fail */ 2010a3d2eaf0SJohannes Berg static int __set_regdom(const struct ieee80211_regdomain *rd) 2011b2e1b302SLuis R. Rodriguez { 20129c96477dSLuis R. Rodriguez const struct ieee80211_regdomain *intersected_rd = NULL; 201379c97e97SJohannes Berg struct cfg80211_registered_device *rdev = NULL; 2014806a9e39SLuis R. Rodriguez struct wiphy *request_wiphy; 2015b2e1b302SLuis R. Rodriguez /* Some basic sanity checks first */ 2016b2e1b302SLuis R. Rodriguez 2017b2e1b302SLuis R. Rodriguez if (is_world_regdom(rd->alpha2)) { 2018f6037d09SJohannes Berg if (WARN_ON(!reg_is_valid_request(rd->alpha2))) 2019b2e1b302SLuis R. Rodriguez return -EINVAL; 2020b2e1b302SLuis R. Rodriguez update_world_regdomain(rd); 2021b2e1b302SLuis R. Rodriguez return 0; 2022b2e1b302SLuis R. Rodriguez } 2023b2e1b302SLuis R. Rodriguez 2024b2e1b302SLuis R. Rodriguez if (!is_alpha2_set(rd->alpha2) && !is_an_alpha2(rd->alpha2) && 2025b2e1b302SLuis R. Rodriguez !is_unknown_alpha2(rd->alpha2)) 2026b2e1b302SLuis R. Rodriguez return -EINVAL; 2027b2e1b302SLuis R. Rodriguez 2028f6037d09SJohannes Berg if (!last_request) 2029b2e1b302SLuis R. Rodriguez return -EINVAL; 2030b2e1b302SLuis R. Rodriguez 2031fb1fc7adSLuis R. Rodriguez /* 2032fb1fc7adSLuis R. Rodriguez * Lets only bother proceeding on the same alpha2 if the current 20333f2355cbSLuis R. Rodriguez * rd is non static (it means CRDA was present and was used last) 2034fb1fc7adSLuis R. Rodriguez * and the pending request came in from a country IE 2035fb1fc7adSLuis R. Rodriguez */ 20367db90f4aSLuis R. Rodriguez if (last_request->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE) { 2037fb1fc7adSLuis R. Rodriguez /* 2038fb1fc7adSLuis R. Rodriguez * If someone else asked us to change the rd lets only bother 2039fb1fc7adSLuis R. Rodriguez * checking if the alpha2 changes if CRDA was already called 2040fb1fc7adSLuis R. Rodriguez */ 2041baeb66feSJohn W. Linville if (!regdom_changes(rd->alpha2)) 2042b2e1b302SLuis R. Rodriguez return -EINVAL; 20433f2355cbSLuis R. Rodriguez } 20443f2355cbSLuis R. Rodriguez 2045fb1fc7adSLuis R. Rodriguez /* 2046fb1fc7adSLuis R. Rodriguez * Now lets set the regulatory domain, update all driver channels 2047b2e1b302SLuis R. Rodriguez * and finally inform them of what we have done, in case they want 2048b2e1b302SLuis R. Rodriguez * to review or adjust their own settings based on their own 2049fb1fc7adSLuis R. Rodriguez * internal EEPROM data 2050fb1fc7adSLuis R. Rodriguez */ 2051b2e1b302SLuis R. Rodriguez 2052f6037d09SJohannes Berg if (WARN_ON(!reg_is_valid_request(rd->alpha2))) 2053b2e1b302SLuis R. Rodriguez return -EINVAL; 2054b2e1b302SLuis R. Rodriguez 2055b2e1b302SLuis R. Rodriguez if (!is_valid_rd(rd)) { 2056b2e1b302SLuis R. Rodriguez printk(KERN_ERR "cfg80211: Invalid " 2057b2e1b302SLuis R. Rodriguez "regulatory domain detected:\n"); 2058b2e1b302SLuis R. Rodriguez print_regdomain_info(rd); 2059b2e1b302SLuis R. Rodriguez return -EINVAL; 2060b2e1b302SLuis R. Rodriguez } 2061b2e1b302SLuis R. Rodriguez 2062806a9e39SLuis R. Rodriguez request_wiphy = wiphy_idx_to_wiphy(last_request->wiphy_idx); 2063806a9e39SLuis R. Rodriguez 2064b8295acdSLuis R. Rodriguez if (!last_request->intersect) { 20653e0c3ff3SLuis R. Rodriguez int r; 20663e0c3ff3SLuis R. Rodriguez 20677db90f4aSLuis R. Rodriguez if (last_request->initiator != NL80211_REGDOM_SET_BY_DRIVER) { 20683e0c3ff3SLuis R. Rodriguez reset_regdomains(); 20693e0c3ff3SLuis R. Rodriguez cfg80211_regdomain = rd; 20703e0c3ff3SLuis R. Rodriguez return 0; 20713e0c3ff3SLuis R. Rodriguez } 20723e0c3ff3SLuis R. Rodriguez 2073fb1fc7adSLuis R. Rodriguez /* 2074fb1fc7adSLuis R. Rodriguez * For a driver hint, lets copy the regulatory domain the 2075fb1fc7adSLuis R. Rodriguez * driver wanted to the wiphy to deal with conflicts 2076fb1fc7adSLuis R. Rodriguez */ 20773e0c3ff3SLuis R. Rodriguez 2078558f6d32SLuis R. Rodriguez /* 2079558f6d32SLuis R. Rodriguez * Userspace could have sent two replies with only 2080558f6d32SLuis R. Rodriguez * one kernel request. 2081558f6d32SLuis R. Rodriguez */ 2082558f6d32SLuis R. Rodriguez if (request_wiphy->regd) 2083558f6d32SLuis R. Rodriguez return -EALREADY; 20843e0c3ff3SLuis R. Rodriguez 2085806a9e39SLuis R. Rodriguez r = reg_copy_regd(&request_wiphy->regd, rd); 20863e0c3ff3SLuis R. Rodriguez if (r) 20873e0c3ff3SLuis R. Rodriguez return r; 20883e0c3ff3SLuis R. Rodriguez 2089b8295acdSLuis R. Rodriguez reset_regdomains(); 2090b8295acdSLuis R. Rodriguez cfg80211_regdomain = rd; 2091b8295acdSLuis R. Rodriguez return 0; 2092b8295acdSLuis R. Rodriguez } 2093b8295acdSLuis R. Rodriguez 2094b8295acdSLuis R. Rodriguez /* Intersection requires a bit more work */ 2095b8295acdSLuis R. Rodriguez 20967db90f4aSLuis R. Rodriguez if (last_request->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE) { 2097b8295acdSLuis R. Rodriguez 20989c96477dSLuis R. Rodriguez intersected_rd = regdom_intersect(rd, cfg80211_regdomain); 20999c96477dSLuis R. Rodriguez if (!intersected_rd) 21009c96477dSLuis R. Rodriguez return -EINVAL; 2101b8295acdSLuis R. Rodriguez 2102fb1fc7adSLuis R. Rodriguez /* 2103fb1fc7adSLuis R. Rodriguez * We can trash what CRDA provided now. 21043e0c3ff3SLuis R. Rodriguez * However if a driver requested this specific regulatory 2105fb1fc7adSLuis R. Rodriguez * domain we keep it for its private use 2106fb1fc7adSLuis R. Rodriguez */ 21077db90f4aSLuis R. Rodriguez if (last_request->initiator == NL80211_REGDOM_SET_BY_DRIVER) 2108806a9e39SLuis R. Rodriguez request_wiphy->regd = rd; 21093e0c3ff3SLuis R. Rodriguez else 21109c96477dSLuis R. Rodriguez kfree(rd); 21113e0c3ff3SLuis R. Rodriguez 2112b8295acdSLuis R. Rodriguez rd = NULL; 2113b8295acdSLuis R. Rodriguez 2114b8295acdSLuis R. Rodriguez reset_regdomains(); 2115b8295acdSLuis R. Rodriguez cfg80211_regdomain = intersected_rd; 2116b8295acdSLuis R. Rodriguez 2117b8295acdSLuis R. Rodriguez return 0; 21189c96477dSLuis R. Rodriguez } 21199c96477dSLuis R. Rodriguez 21203f2355cbSLuis R. Rodriguez /* 21213f2355cbSLuis R. Rodriguez * Country IE requests are handled a bit differently, we intersect 21223f2355cbSLuis R. Rodriguez * the country IE rd with what CRDA believes that country should have 21233f2355cbSLuis R. Rodriguez */ 21243f2355cbSLuis R. Rodriguez 2125729e9c76SLuis R. Rodriguez /* 2126729e9c76SLuis R. Rodriguez * Userspace could have sent two replies with only 2127729e9c76SLuis R. Rodriguez * one kernel request. By the second reply we would have 2128729e9c76SLuis R. Rodriguez * already processed and consumed the country_ie_regdomain. 2129729e9c76SLuis R. Rodriguez */ 2130729e9c76SLuis R. Rodriguez if (!country_ie_regdomain) 2131729e9c76SLuis R. Rodriguez return -EALREADY; 213286f04680SLuis R. Rodriguez BUG_ON(rd == country_ie_regdomain); 21333f2355cbSLuis R. Rodriguez 2134fb1fc7adSLuis R. Rodriguez /* 2135fb1fc7adSLuis R. Rodriguez * Intersect what CRDA returned and our what we 2136fb1fc7adSLuis R. Rodriguez * had built from the Country IE received 2137fb1fc7adSLuis R. Rodriguez */ 21383f2355cbSLuis R. Rodriguez 21393f2355cbSLuis R. Rodriguez intersected_rd = regdom_intersect(rd, country_ie_regdomain); 21403f2355cbSLuis R. Rodriguez 214186f04680SLuis R. Rodriguez reg_country_ie_process_debug(rd, 214286f04680SLuis R. Rodriguez country_ie_regdomain, 21433f2355cbSLuis R. Rodriguez intersected_rd); 21443f2355cbSLuis R. Rodriguez 21453f2355cbSLuis R. Rodriguez kfree(country_ie_regdomain); 21463f2355cbSLuis R. Rodriguez country_ie_regdomain = NULL; 21473f2355cbSLuis R. Rodriguez 21483f2355cbSLuis R. Rodriguez if (!intersected_rd) 21493f2355cbSLuis R. Rodriguez return -EINVAL; 21503f2355cbSLuis R. Rodriguez 215179c97e97SJohannes Berg rdev = wiphy_to_dev(request_wiphy); 21523f2355cbSLuis R. Rodriguez 215379c97e97SJohannes Berg rdev->country_ie_alpha2[0] = rd->alpha2[0]; 215479c97e97SJohannes Berg rdev->country_ie_alpha2[1] = rd->alpha2[1]; 215579c97e97SJohannes Berg rdev->env = last_request->country_ie_env; 21563f2355cbSLuis R. Rodriguez 21573f2355cbSLuis R. Rodriguez BUG_ON(intersected_rd == rd); 21583f2355cbSLuis R. Rodriguez 21593f2355cbSLuis R. Rodriguez kfree(rd); 21603f2355cbSLuis R. Rodriguez rd = NULL; 21613f2355cbSLuis R. Rodriguez 2162b8295acdSLuis R. Rodriguez reset_regdomains(); 21633f2355cbSLuis R. Rodriguez cfg80211_regdomain = intersected_rd; 2164b2e1b302SLuis R. Rodriguez 2165b2e1b302SLuis R. Rodriguez return 0; 2166b2e1b302SLuis R. Rodriguez } 2167b2e1b302SLuis R. Rodriguez 2168b2e1b302SLuis R. Rodriguez 2169fb1fc7adSLuis R. Rodriguez /* 2170fb1fc7adSLuis R. Rodriguez * Use this call to set the current regulatory domain. Conflicts with 2171b2e1b302SLuis R. Rodriguez * multiple drivers can be ironed out later. Caller must've already 2172fb1fc7adSLuis R. Rodriguez * kmalloc'd the rd structure. Caller must hold cfg80211_mutex 2173fb1fc7adSLuis R. Rodriguez */ 2174a3d2eaf0SJohannes Berg int set_regdom(const struct ieee80211_regdomain *rd) 2175b2e1b302SLuis R. Rodriguez { 2176b2e1b302SLuis R. Rodriguez int r; 2177b2e1b302SLuis R. Rodriguez 2178761cf7ecSLuis R. Rodriguez assert_cfg80211_lock(); 2179761cf7ecSLuis R. Rodriguez 2180abc7381bSLuis R. Rodriguez mutex_lock(®_mutex); 2181abc7381bSLuis R. Rodriguez 2182b2e1b302SLuis R. Rodriguez /* Note that this doesn't update the wiphys, this is done below */ 2183b2e1b302SLuis R. Rodriguez r = __set_regdom(rd); 2184d2372b31SJohannes Berg if (r) { 2185d2372b31SJohannes Berg kfree(rd); 2186abc7381bSLuis R. Rodriguez mutex_unlock(®_mutex); 2187b2e1b302SLuis R. Rodriguez return r; 2188d2372b31SJohannes Berg } 2189b2e1b302SLuis R. Rodriguez 2190b2e1b302SLuis R. Rodriguez /* This would make this whole thing pointless */ 2191a01ddafdSLuis R. Rodriguez if (!last_request->intersect) 2192b2e1b302SLuis R. Rodriguez BUG_ON(rd != cfg80211_regdomain); 2193b2e1b302SLuis R. Rodriguez 2194b2e1b302SLuis R. Rodriguez /* update all wiphys now with the new established regulatory domain */ 2195f6037d09SJohannes Berg update_all_wiphy_regulatory(last_request->initiator); 2196b2e1b302SLuis R. Rodriguez 2197a01ddafdSLuis R. Rodriguez print_regdomain(cfg80211_regdomain); 2198b2e1b302SLuis R. Rodriguez 219973d54c9eSLuis R. Rodriguez nl80211_send_reg_change_event(last_request); 220073d54c9eSLuis R. Rodriguez 2201abc7381bSLuis R. Rodriguez mutex_unlock(®_mutex); 2202abc7381bSLuis R. Rodriguez 2203b2e1b302SLuis R. Rodriguez return r; 2204b2e1b302SLuis R. Rodriguez } 2205b2e1b302SLuis R. Rodriguez 2206a1794390SLuis R. Rodriguez /* Caller must hold cfg80211_mutex */ 22073f2355cbSLuis R. Rodriguez void reg_device_remove(struct wiphy *wiphy) 22083f2355cbSLuis R. Rodriguez { 22090ad8acafSLuis R. Rodriguez struct wiphy *request_wiphy = NULL; 2210806a9e39SLuis R. Rodriguez 2211761cf7ecSLuis R. Rodriguez assert_cfg80211_lock(); 2212761cf7ecSLuis R. Rodriguez 2213abc7381bSLuis R. Rodriguez mutex_lock(®_mutex); 2214abc7381bSLuis R. Rodriguez 22150ef9ccddSChris Wright kfree(wiphy->regd); 22160ef9ccddSChris Wright 22170ad8acafSLuis R. Rodriguez if (last_request) 2218806a9e39SLuis R. Rodriguez request_wiphy = wiphy_idx_to_wiphy(last_request->wiphy_idx); 2219806a9e39SLuis R. Rodriguez 22200ef9ccddSChris Wright if (!request_wiphy || request_wiphy != wiphy) 2221abc7381bSLuis R. Rodriguez goto out; 22220ef9ccddSChris Wright 2223806a9e39SLuis R. Rodriguez last_request->wiphy_idx = WIPHY_IDX_STALE; 22243f2355cbSLuis R. Rodriguez last_request->country_ie_env = ENVIRON_ANY; 2225abc7381bSLuis R. Rodriguez out: 2226abc7381bSLuis R. Rodriguez mutex_unlock(®_mutex); 22273f2355cbSLuis R. Rodriguez } 22283f2355cbSLuis R. Rodriguez 2229b2e1b302SLuis R. Rodriguez int regulatory_init(void) 2230b2e1b302SLuis R. Rodriguez { 2231bcf4f99bSLuis R. Rodriguez int err = 0; 2232734366deSJohannes Berg 2233b2e1b302SLuis R. Rodriguez reg_pdev = platform_device_register_simple("regulatory", 0, NULL, 0); 2234b2e1b302SLuis R. Rodriguez if (IS_ERR(reg_pdev)) 2235b2e1b302SLuis R. Rodriguez return PTR_ERR(reg_pdev); 2236734366deSJohannes Berg 2237fe33eb39SLuis R. Rodriguez spin_lock_init(®_requests_lock); 2238e38f8a7aSLuis R. Rodriguez spin_lock_init(®_pending_beacons_lock); 2239fe33eb39SLuis R. Rodriguez 2240a3d2eaf0SJohannes Berg cfg80211_regdomain = cfg80211_world_regdom; 2241734366deSJohannes Berg 2242ae9e4b0dSLuis R. Rodriguez /* We always try to get an update for the static regdomain */ 2243ae9e4b0dSLuis R. Rodriguez err = regulatory_hint_core(cfg80211_regdomain->alpha2); 2244bcf4f99bSLuis R. Rodriguez if (err) { 2245bcf4f99bSLuis R. Rodriguez if (err == -ENOMEM) 2246bcf4f99bSLuis R. Rodriguez return err; 2247bcf4f99bSLuis R. Rodriguez /* 2248bcf4f99bSLuis R. Rodriguez * N.B. kobject_uevent_env() can fail mainly for when we're out 2249bcf4f99bSLuis R. Rodriguez * memory which is handled and propagated appropriately above 2250bcf4f99bSLuis R. Rodriguez * but it can also fail during a netlink_broadcast() or during 2251bcf4f99bSLuis R. Rodriguez * early boot for call_usermodehelper(). For now treat these 2252bcf4f99bSLuis R. Rodriguez * errors as non-fatal. 2253bcf4f99bSLuis R. Rodriguez */ 2254bcf4f99bSLuis R. Rodriguez printk(KERN_ERR "cfg80211: kobject_uevent_env() was unable " 2255bcf4f99bSLuis R. Rodriguez "to call CRDA during init"); 2256bcf4f99bSLuis R. Rodriguez #ifdef CONFIG_CFG80211_REG_DEBUG 2257bcf4f99bSLuis R. Rodriguez /* We want to find out exactly why when debugging */ 2258bcf4f99bSLuis R. Rodriguez WARN_ON(err); 2259bcf4f99bSLuis R. Rodriguez #endif 2260bcf4f99bSLuis R. Rodriguez } 2261734366deSJohannes Berg 2262ae9e4b0dSLuis R. Rodriguez /* 2263ae9e4b0dSLuis R. Rodriguez * Finally, if the user set the module parameter treat it 2264ae9e4b0dSLuis R. Rodriguez * as a user hint. 2265ae9e4b0dSLuis R. Rodriguez */ 2266ae9e4b0dSLuis R. Rodriguez if (!is_world_regdom(ieee80211_regdom)) 2267ae9e4b0dSLuis R. Rodriguez regulatory_hint_user(ieee80211_regdom); 2268ae9e4b0dSLuis R. Rodriguez 2269b2e1b302SLuis R. Rodriguez return 0; 2270b2e1b302SLuis R. Rodriguez } 2271b2e1b302SLuis R. Rodriguez 2272b2e1b302SLuis R. Rodriguez void regulatory_exit(void) 2273b2e1b302SLuis R. Rodriguez { 2274fe33eb39SLuis R. Rodriguez struct regulatory_request *reg_request, *tmp; 2275e38f8a7aSLuis R. Rodriguez struct reg_beacon *reg_beacon, *btmp; 2276fe33eb39SLuis R. Rodriguez 2277fe33eb39SLuis R. Rodriguez cancel_work_sync(®_work); 2278fe33eb39SLuis R. Rodriguez 2279a1794390SLuis R. Rodriguez mutex_lock(&cfg80211_mutex); 2280abc7381bSLuis R. Rodriguez mutex_lock(®_mutex); 2281734366deSJohannes Berg 2282b2e1b302SLuis R. Rodriguez reset_regdomains(); 2283734366deSJohannes Berg 22843f2355cbSLuis R. Rodriguez kfree(country_ie_regdomain); 22853f2355cbSLuis R. Rodriguez country_ie_regdomain = NULL; 22863f2355cbSLuis R. Rodriguez 2287f6037d09SJohannes Berg kfree(last_request); 2288f6037d09SJohannes Berg 2289b2e1b302SLuis R. Rodriguez platform_device_unregister(reg_pdev); 2290734366deSJohannes Berg 2291e38f8a7aSLuis R. Rodriguez spin_lock_bh(®_pending_beacons_lock); 2292e38f8a7aSLuis R. Rodriguez if (!list_empty(®_pending_beacons)) { 2293e38f8a7aSLuis R. Rodriguez list_for_each_entry_safe(reg_beacon, btmp, 2294e38f8a7aSLuis R. Rodriguez ®_pending_beacons, list) { 2295e38f8a7aSLuis R. Rodriguez list_del(®_beacon->list); 2296e38f8a7aSLuis R. Rodriguez kfree(reg_beacon); 2297e38f8a7aSLuis R. Rodriguez } 2298e38f8a7aSLuis R. Rodriguez } 2299e38f8a7aSLuis R. Rodriguez spin_unlock_bh(®_pending_beacons_lock); 2300e38f8a7aSLuis R. Rodriguez 2301e38f8a7aSLuis R. Rodriguez if (!list_empty(®_beacon_list)) { 2302e38f8a7aSLuis R. Rodriguez list_for_each_entry_safe(reg_beacon, btmp, 2303e38f8a7aSLuis R. Rodriguez ®_beacon_list, list) { 2304e38f8a7aSLuis R. Rodriguez list_del(®_beacon->list); 2305e38f8a7aSLuis R. Rodriguez kfree(reg_beacon); 2306e38f8a7aSLuis R. Rodriguez } 2307e38f8a7aSLuis R. Rodriguez } 2308e38f8a7aSLuis R. Rodriguez 2309fe33eb39SLuis R. Rodriguez spin_lock(®_requests_lock); 2310fe33eb39SLuis R. Rodriguez if (!list_empty(®_requests_list)) { 2311fe33eb39SLuis R. Rodriguez list_for_each_entry_safe(reg_request, tmp, 2312fe33eb39SLuis R. Rodriguez ®_requests_list, list) { 2313fe33eb39SLuis R. Rodriguez list_del(®_request->list); 2314fe33eb39SLuis R. Rodriguez kfree(reg_request); 2315fe33eb39SLuis R. Rodriguez } 2316fe33eb39SLuis R. Rodriguez } 2317fe33eb39SLuis R. Rodriguez spin_unlock(®_requests_lock); 2318fe33eb39SLuis R. Rodriguez 2319abc7381bSLuis R. Rodriguez mutex_unlock(®_mutex); 2320a1794390SLuis R. Rodriguez mutex_unlock(&cfg80211_mutex); 23218318d78aSJohannes Berg } 2322