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 */ 35e9c0268fSJoe Perches 36e9c0268fSJoe Perches #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 37e9c0268fSJoe Perches 388318d78aSJohannes Berg #include <linux/kernel.h> 395a0e3ad6STejun Heo #include <linux/slab.h> 40b2e1b302SLuis R. Rodriguez #include <linux/list.h> 41b2e1b302SLuis R. Rodriguez #include <linux/random.h> 42c61029c7SJohn W. Linville #include <linux/ctype.h> 43b2e1b302SLuis R. Rodriguez #include <linux/nl80211.h> 44b2e1b302SLuis R. Rodriguez #include <linux/platform_device.h> 45b2e1b302SLuis R. Rodriguez #include <net/cfg80211.h> 468318d78aSJohannes Berg #include "core.h" 47b2e1b302SLuis R. Rodriguez #include "reg.h" 483b377ea9SJohn W. Linville #include "regdb.h" 4973d54c9eSLuis R. Rodriguez #include "nl80211.h" 508318d78aSJohannes Berg 514113f751SLuis R. Rodriguez #ifdef CONFIG_CFG80211_REG_DEBUG 528271195eSJohn W. Linville #define REG_DBG_PRINT(format, args...) \ 534113f751SLuis R. Rodriguez do { \ 54e9c0268fSJoe Perches printk(KERN_DEBUG pr_fmt(format), ##args); \ 554113f751SLuis R. Rodriguez } while (0) 564113f751SLuis R. Rodriguez #else 578271195eSJohn W. Linville #define REG_DBG_PRINT(args...) 584113f751SLuis R. Rodriguez #endif 594113f751SLuis R. Rodriguez 605166ccd2SLuis R. Rodriguez /* Receipt of information from last regulatory request */ 61f6037d09SJohannes Berg static struct regulatory_request *last_request; 62734366deSJohannes Berg 63b2e1b302SLuis R. Rodriguez /* To trigger userspace events */ 64b2e1b302SLuis R. Rodriguez static struct platform_device *reg_pdev; 658318d78aSJohannes Berg 664d9d88d1SScott James Remnant static struct device_type reg_device_type = { 674d9d88d1SScott James Remnant .uevent = reg_device_uevent, 684d9d88d1SScott James Remnant }; 694d9d88d1SScott James Remnant 70fb1fc7adSLuis R. Rodriguez /* 71fb1fc7adSLuis R. Rodriguez * Central wireless core regulatory domains, we only need two, 72734366deSJohannes Berg * the current one and a world regulatory domain in case we have no 73fb1fc7adSLuis R. Rodriguez * information to give us an alpha2 74fb1fc7adSLuis R. Rodriguez */ 75f130347cSLuis R. Rodriguez const struct ieee80211_regdomain *cfg80211_regdomain; 76734366deSJohannes Berg 77fb1fc7adSLuis R. Rodriguez /* 78abc7381bSLuis R. Rodriguez * Protects static reg.c components: 79abc7381bSLuis R. Rodriguez * - cfg80211_world_regdom 80abc7381bSLuis R. Rodriguez * - cfg80211_regdom 81abc7381bSLuis R. Rodriguez * - last_request 82abc7381bSLuis R. Rodriguez */ 83670b7f11SJohn W. Linville static DEFINE_MUTEX(reg_mutex); 8446a5ebafSJohannes Berg 8546a5ebafSJohannes Berg static inline void assert_reg_lock(void) 8646a5ebafSJohannes Berg { 8746a5ebafSJohannes Berg lockdep_assert_held(®_mutex); 8846a5ebafSJohannes Berg } 89abc7381bSLuis R. Rodriguez 90e38f8a7aSLuis R. Rodriguez /* Used to queue up regulatory hints */ 91fe33eb39SLuis R. Rodriguez static LIST_HEAD(reg_requests_list); 92fe33eb39SLuis R. Rodriguez static spinlock_t reg_requests_lock; 93fe33eb39SLuis R. Rodriguez 94e38f8a7aSLuis R. Rodriguez /* Used to queue up beacon hints for review */ 95e38f8a7aSLuis R. Rodriguez static LIST_HEAD(reg_pending_beacons); 96e38f8a7aSLuis R. Rodriguez static spinlock_t reg_pending_beacons_lock; 97e38f8a7aSLuis R. Rodriguez 98e38f8a7aSLuis R. Rodriguez /* Used to keep track of processed beacon hints */ 99e38f8a7aSLuis R. Rodriguez static LIST_HEAD(reg_beacon_list); 100e38f8a7aSLuis R. Rodriguez 101e38f8a7aSLuis R. Rodriguez struct reg_beacon { 102e38f8a7aSLuis R. Rodriguez struct list_head list; 103e38f8a7aSLuis R. Rodriguez struct ieee80211_channel chan; 104e38f8a7aSLuis R. Rodriguez }; 105e38f8a7aSLuis R. Rodriguez 106f333a7a2SLuis R. Rodriguez static void reg_todo(struct work_struct *work); 107f333a7a2SLuis R. Rodriguez static DECLARE_WORK(reg_work, reg_todo); 108f333a7a2SLuis R. Rodriguez 109734366deSJohannes Berg /* We keep a static world regulatory domain in case of the absence of CRDA */ 110734366deSJohannes Berg static const struct ieee80211_regdomain world_regdom = { 111611b6a82SLuis R. Rodriguez .n_reg_rules = 5, 112734366deSJohannes Berg .alpha2 = "00", 113734366deSJohannes Berg .reg_rules = { 11468798a62SLuis R. Rodriguez /* IEEE 802.11b/g, channels 1..11 */ 11568798a62SLuis R. Rodriguez REG_RULE(2412-10, 2462+10, 40, 6, 20, 0), 116611b6a82SLuis R. Rodriguez /* IEEE 802.11b/g, channels 12..13. No HT40 117611b6a82SLuis R. Rodriguez * channel fits here. */ 118611b6a82SLuis R. Rodriguez REG_RULE(2467-10, 2472+10, 20, 6, 20, 119611b6a82SLuis R. Rodriguez NL80211_RRF_PASSIVE_SCAN | 120611b6a82SLuis R. Rodriguez NL80211_RRF_NO_IBSS), 121611b6a82SLuis R. Rodriguez /* IEEE 802.11 channel 14 - Only JP enables 122611b6a82SLuis R. Rodriguez * this and for 802.11b only */ 123611b6a82SLuis R. Rodriguez REG_RULE(2484-10, 2484+10, 20, 6, 20, 124611b6a82SLuis R. Rodriguez NL80211_RRF_PASSIVE_SCAN | 125611b6a82SLuis R. Rodriguez NL80211_RRF_NO_IBSS | 126611b6a82SLuis R. Rodriguez NL80211_RRF_NO_OFDM), 1273fc71f77SLuis R. Rodriguez /* IEEE 802.11a, channel 36..48 */ 128ec329aceSLuis R. Rodriguez REG_RULE(5180-10, 5240+10, 40, 6, 20, 1293fc71f77SLuis R. Rodriguez NL80211_RRF_PASSIVE_SCAN | 1303fc71f77SLuis R. Rodriguez NL80211_RRF_NO_IBSS), 1313fc71f77SLuis R. Rodriguez 1323fc71f77SLuis R. Rodriguez /* NB: 5260 MHz - 5700 MHz requies DFS */ 1333fc71f77SLuis R. Rodriguez 1343fc71f77SLuis R. Rodriguez /* IEEE 802.11a, channel 149..165 */ 135ec329aceSLuis R. Rodriguez REG_RULE(5745-10, 5825+10, 40, 6, 20, 1363fc71f77SLuis R. Rodriguez NL80211_RRF_PASSIVE_SCAN | 1373fc71f77SLuis R. Rodriguez NL80211_RRF_NO_IBSS), 138734366deSJohannes Berg } 139734366deSJohannes Berg }; 140734366deSJohannes Berg 141a3d2eaf0SJohannes Berg static const struct ieee80211_regdomain *cfg80211_world_regdom = 142a3d2eaf0SJohannes Berg &world_regdom; 143734366deSJohannes Berg 1446ee7d330SLuis R. Rodriguez static char *ieee80211_regdom = "00"; 14509d989d1SLuis R. Rodriguez static char user_alpha2[2]; 1466ee7d330SLuis R. Rodriguez 147734366deSJohannes Berg module_param(ieee80211_regdom, charp, 0444); 148734366deSJohannes Berg MODULE_PARM_DESC(ieee80211_regdom, "IEEE 802.11 regulatory domain code"); 149734366deSJohannes Berg 150734366deSJohannes Berg static void reset_regdomains(void) 151734366deSJohannes Berg { 152942b25cfSJohannes Berg /* avoid freeing static information or freeing something twice */ 153942b25cfSJohannes Berg if (cfg80211_regdomain == cfg80211_world_regdom) 154942b25cfSJohannes Berg cfg80211_regdomain = NULL; 155942b25cfSJohannes Berg if (cfg80211_world_regdom == &world_regdom) 156942b25cfSJohannes Berg cfg80211_world_regdom = NULL; 157942b25cfSJohannes Berg if (cfg80211_regdomain == &world_regdom) 158942b25cfSJohannes Berg cfg80211_regdomain = NULL; 159942b25cfSJohannes Berg 160734366deSJohannes Berg kfree(cfg80211_regdomain); 161734366deSJohannes Berg kfree(cfg80211_world_regdom); 162734366deSJohannes Berg 163a3d2eaf0SJohannes Berg cfg80211_world_regdom = &world_regdom; 164734366deSJohannes Berg cfg80211_regdomain = NULL; 165734366deSJohannes Berg } 166734366deSJohannes Berg 167fb1fc7adSLuis R. Rodriguez /* 168fb1fc7adSLuis R. Rodriguez * Dynamic world regulatory domain requested by the wireless 169fb1fc7adSLuis R. Rodriguez * core upon initialization 170fb1fc7adSLuis R. Rodriguez */ 171a3d2eaf0SJohannes Berg static void update_world_regdomain(const struct ieee80211_regdomain *rd) 172734366deSJohannes Berg { 173f6037d09SJohannes Berg BUG_ON(!last_request); 174734366deSJohannes Berg 175734366deSJohannes Berg reset_regdomains(); 176734366deSJohannes Berg 177734366deSJohannes Berg cfg80211_world_regdom = rd; 178734366deSJohannes Berg cfg80211_regdomain = rd; 179734366deSJohannes Berg } 180734366deSJohannes Berg 181a3d2eaf0SJohannes Berg bool is_world_regdom(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 190a3d2eaf0SJohannes Berg static bool is_alpha2_set(const char *alpha2) 191b2e1b302SLuis R. Rodriguez { 192b2e1b302SLuis R. Rodriguez if (!alpha2) 193b2e1b302SLuis R. Rodriguez return false; 194b2e1b302SLuis R. Rodriguez if (alpha2[0] != 0 && alpha2[1] != 0) 195b2e1b302SLuis R. Rodriguez return true; 196b2e1b302SLuis R. Rodriguez return false; 197b2e1b302SLuis R. Rodriguez } 198b2e1b302SLuis R. Rodriguez 199a3d2eaf0SJohannes Berg static bool is_unknown_alpha2(const char *alpha2) 200b2e1b302SLuis R. Rodriguez { 201b2e1b302SLuis R. Rodriguez if (!alpha2) 202b2e1b302SLuis R. Rodriguez return false; 203fb1fc7adSLuis R. Rodriguez /* 204fb1fc7adSLuis R. Rodriguez * Special case where regulatory domain was built by driver 205fb1fc7adSLuis R. Rodriguez * but a specific alpha2 cannot be determined 206fb1fc7adSLuis R. Rodriguez */ 207b2e1b302SLuis R. Rodriguez if (alpha2[0] == '9' && alpha2[1] == '9') 208b2e1b302SLuis R. Rodriguez return true; 209b2e1b302SLuis R. Rodriguez return false; 210b2e1b302SLuis R. Rodriguez } 211b2e1b302SLuis R. Rodriguez 2123f2355cbSLuis R. Rodriguez static bool is_intersected_alpha2(const char *alpha2) 2133f2355cbSLuis R. Rodriguez { 2143f2355cbSLuis R. Rodriguez if (!alpha2) 2153f2355cbSLuis R. Rodriguez return false; 216fb1fc7adSLuis R. Rodriguez /* 217fb1fc7adSLuis R. Rodriguez * Special case where regulatory domain is the 2183f2355cbSLuis R. Rodriguez * result of an intersection between two regulatory domain 219fb1fc7adSLuis R. Rodriguez * structures 220fb1fc7adSLuis R. Rodriguez */ 2213f2355cbSLuis R. Rodriguez if (alpha2[0] == '9' && alpha2[1] == '8') 2223f2355cbSLuis R. Rodriguez return true; 2233f2355cbSLuis R. Rodriguez return false; 2243f2355cbSLuis R. Rodriguez } 2253f2355cbSLuis R. Rodriguez 226a3d2eaf0SJohannes Berg static bool is_an_alpha2(const char *alpha2) 227b2e1b302SLuis R. Rodriguez { 228b2e1b302SLuis R. Rodriguez if (!alpha2) 229b2e1b302SLuis R. Rodriguez return false; 230c61029c7SJohn W. Linville if (isalpha(alpha2[0]) && isalpha(alpha2[1])) 231b2e1b302SLuis R. Rodriguez return true; 232b2e1b302SLuis R. Rodriguez return false; 233b2e1b302SLuis R. Rodriguez } 234b2e1b302SLuis R. Rodriguez 235a3d2eaf0SJohannes Berg static bool alpha2_equal(const char *alpha2_x, const char *alpha2_y) 236b2e1b302SLuis R. Rodriguez { 237b2e1b302SLuis R. Rodriguez if (!alpha2_x || !alpha2_y) 238b2e1b302SLuis R. Rodriguez return false; 239b2e1b302SLuis R. Rodriguez if (alpha2_x[0] == alpha2_y[0] && 240b2e1b302SLuis R. Rodriguez alpha2_x[1] == alpha2_y[1]) 241b2e1b302SLuis R. Rodriguez return true; 242b2e1b302SLuis R. Rodriguez return false; 243b2e1b302SLuis R. Rodriguez } 244b2e1b302SLuis R. Rodriguez 24569b1572bSLuis R. Rodriguez static bool regdom_changes(const char *alpha2) 246b2e1b302SLuis R. Rodriguez { 247761cf7ecSLuis R. Rodriguez assert_cfg80211_lock(); 248761cf7ecSLuis R. Rodriguez 249b2e1b302SLuis R. Rodriguez if (!cfg80211_regdomain) 250b2e1b302SLuis R. Rodriguez return true; 251b2e1b302SLuis R. Rodriguez if (alpha2_equal(cfg80211_regdomain->alpha2, alpha2)) 252b2e1b302SLuis R. Rodriguez return false; 253b2e1b302SLuis R. Rodriguez return true; 254b2e1b302SLuis R. Rodriguez } 255b2e1b302SLuis R. Rodriguez 25609d989d1SLuis R. Rodriguez /* 25709d989d1SLuis R. Rodriguez * The NL80211_REGDOM_SET_BY_USER regdom alpha2 is cached, this lets 25809d989d1SLuis R. Rodriguez * you know if a valid regulatory hint with NL80211_REGDOM_SET_BY_USER 25909d989d1SLuis R. Rodriguez * has ever been issued. 26009d989d1SLuis R. Rodriguez */ 26109d989d1SLuis R. Rodriguez static bool is_user_regdom_saved(void) 26209d989d1SLuis R. Rodriguez { 26309d989d1SLuis R. Rodriguez if (user_alpha2[0] == '9' && user_alpha2[1] == '7') 26409d989d1SLuis R. Rodriguez return false; 26509d989d1SLuis R. Rodriguez 26609d989d1SLuis R. Rodriguez /* This would indicate a mistake on the design */ 26709d989d1SLuis R. Rodriguez if (WARN((!is_world_regdom(user_alpha2) && 26809d989d1SLuis R. Rodriguez !is_an_alpha2(user_alpha2)), 26909d989d1SLuis R. Rodriguez "Unexpected user alpha2: %c%c\n", 27009d989d1SLuis R. Rodriguez user_alpha2[0], 27109d989d1SLuis R. Rodriguez user_alpha2[1])) 27209d989d1SLuis R. Rodriguez return false; 27309d989d1SLuis R. Rodriguez 27409d989d1SLuis R. Rodriguez return true; 27509d989d1SLuis R. Rodriguez } 27609d989d1SLuis R. Rodriguez 2773b377ea9SJohn W. Linville static int reg_copy_regd(const struct ieee80211_regdomain **dst_regd, 2783b377ea9SJohn W. Linville const struct ieee80211_regdomain *src_regd) 2793b377ea9SJohn W. Linville { 2803b377ea9SJohn W. Linville struct ieee80211_regdomain *regd; 2813b377ea9SJohn W. Linville int size_of_regd = 0; 2823b377ea9SJohn W. Linville unsigned int i; 2833b377ea9SJohn W. Linville 2843b377ea9SJohn W. Linville size_of_regd = sizeof(struct ieee80211_regdomain) + 2853b377ea9SJohn W. Linville ((src_regd->n_reg_rules + 1) * sizeof(struct ieee80211_reg_rule)); 2863b377ea9SJohn W. Linville 2873b377ea9SJohn W. Linville regd = kzalloc(size_of_regd, GFP_KERNEL); 2883b377ea9SJohn W. Linville if (!regd) 2893b377ea9SJohn W. Linville return -ENOMEM; 2903b377ea9SJohn W. Linville 2913b377ea9SJohn W. Linville memcpy(regd, src_regd, sizeof(struct ieee80211_regdomain)); 2923b377ea9SJohn W. Linville 2933b377ea9SJohn W. Linville for (i = 0; i < src_regd->n_reg_rules; i++) 2943b377ea9SJohn W. Linville memcpy(®d->reg_rules[i], &src_regd->reg_rules[i], 2953b377ea9SJohn W. Linville sizeof(struct ieee80211_reg_rule)); 2963b377ea9SJohn W. Linville 2973b377ea9SJohn W. Linville *dst_regd = regd; 2983b377ea9SJohn W. Linville return 0; 2993b377ea9SJohn W. Linville } 3003b377ea9SJohn W. Linville 3013b377ea9SJohn W. Linville #ifdef CONFIG_CFG80211_INTERNAL_REGDB 3023b377ea9SJohn W. Linville struct reg_regdb_search_request { 3033b377ea9SJohn W. Linville char alpha2[2]; 3043b377ea9SJohn W. Linville struct list_head list; 3053b377ea9SJohn W. Linville }; 3063b377ea9SJohn W. Linville 3073b377ea9SJohn W. Linville static LIST_HEAD(reg_regdb_search_list); 308368d06f5SJohn W. Linville static DEFINE_MUTEX(reg_regdb_search_mutex); 3093b377ea9SJohn W. Linville 3103b377ea9SJohn W. Linville static void reg_regdb_search(struct work_struct *work) 3113b377ea9SJohn W. Linville { 3123b377ea9SJohn W. Linville struct reg_regdb_search_request *request; 3133b377ea9SJohn W. Linville const struct ieee80211_regdomain *curdom, *regdom; 3143b377ea9SJohn W. Linville int i, r; 3153b377ea9SJohn W. Linville 316368d06f5SJohn W. Linville mutex_lock(®_regdb_search_mutex); 3173b377ea9SJohn W. Linville while (!list_empty(®_regdb_search_list)) { 3183b377ea9SJohn W. Linville request = list_first_entry(®_regdb_search_list, 3193b377ea9SJohn W. Linville struct reg_regdb_search_request, 3203b377ea9SJohn W. Linville list); 3213b377ea9SJohn W. Linville list_del(&request->list); 3223b377ea9SJohn W. Linville 3233b377ea9SJohn W. Linville for (i=0; i<reg_regdb_size; i++) { 3243b377ea9SJohn W. Linville curdom = reg_regdb[i]; 3253b377ea9SJohn W. Linville 3263b377ea9SJohn W. Linville if (!memcmp(request->alpha2, curdom->alpha2, 2)) { 3273b377ea9SJohn W. Linville r = reg_copy_regd(®dom, curdom); 3283b377ea9SJohn W. Linville if (r) 3293b377ea9SJohn W. Linville break; 3303b377ea9SJohn W. Linville mutex_lock(&cfg80211_mutex); 3313b377ea9SJohn W. Linville set_regdom(regdom); 3323b377ea9SJohn W. Linville mutex_unlock(&cfg80211_mutex); 3333b377ea9SJohn W. Linville break; 3343b377ea9SJohn W. Linville } 3353b377ea9SJohn W. Linville } 3363b377ea9SJohn W. Linville 3373b377ea9SJohn W. Linville kfree(request); 3383b377ea9SJohn W. Linville } 339368d06f5SJohn W. Linville mutex_unlock(®_regdb_search_mutex); 3403b377ea9SJohn W. Linville } 3413b377ea9SJohn W. Linville 3423b377ea9SJohn W. Linville static DECLARE_WORK(reg_regdb_work, reg_regdb_search); 3433b377ea9SJohn W. Linville 3443b377ea9SJohn W. Linville static void reg_regdb_query(const char *alpha2) 3453b377ea9SJohn W. Linville { 3463b377ea9SJohn W. Linville struct reg_regdb_search_request *request; 3473b377ea9SJohn W. Linville 3483b377ea9SJohn W. Linville if (!alpha2) 3493b377ea9SJohn W. Linville return; 3503b377ea9SJohn W. Linville 3513b377ea9SJohn W. Linville request = kzalloc(sizeof(struct reg_regdb_search_request), GFP_KERNEL); 3523b377ea9SJohn W. Linville if (!request) 3533b377ea9SJohn W. Linville return; 3543b377ea9SJohn W. Linville 3553b377ea9SJohn W. Linville memcpy(request->alpha2, alpha2, 2); 3563b377ea9SJohn W. Linville 357368d06f5SJohn W. Linville mutex_lock(®_regdb_search_mutex); 3583b377ea9SJohn W. Linville list_add_tail(&request->list, ®_regdb_search_list); 359368d06f5SJohn W. Linville mutex_unlock(®_regdb_search_mutex); 3603b377ea9SJohn W. Linville 3613b377ea9SJohn W. Linville schedule_work(®_regdb_work); 3623b377ea9SJohn W. Linville } 3633b377ea9SJohn W. Linville #else 3643b377ea9SJohn W. Linville static inline void reg_regdb_query(const char *alpha2) {} 3653b377ea9SJohn W. Linville #endif /* CONFIG_CFG80211_INTERNAL_REGDB */ 3663b377ea9SJohn W. Linville 367fb1fc7adSLuis R. Rodriguez /* 368fb1fc7adSLuis R. Rodriguez * This lets us keep regulatory code which is updated on a regulatory 3694d9d88d1SScott James Remnant * basis in userspace. Country information is filled in by 3704d9d88d1SScott James Remnant * reg_device_uevent 371fb1fc7adSLuis R. Rodriguez */ 372b2e1b302SLuis R. Rodriguez static int call_crda(const char *alpha2) 373b2e1b302SLuis R. Rodriguez { 374b2e1b302SLuis R. Rodriguez if (!is_world_regdom((char *) alpha2)) 375e9c0268fSJoe Perches pr_info("Calling CRDA for country: %c%c\n", 376b2e1b302SLuis R. Rodriguez alpha2[0], alpha2[1]); 377b2e1b302SLuis R. Rodriguez else 378e9c0268fSJoe Perches pr_info("Calling CRDA to update world regulatory domain\n"); 3798318d78aSJohannes Berg 3803b377ea9SJohn W. Linville /* query internal regulatory database (if it exists) */ 3813b377ea9SJohn W. Linville reg_regdb_query(alpha2); 3823b377ea9SJohn W. Linville 3834d9d88d1SScott James Remnant return kobject_uevent(®_pdev->dev.kobj, KOBJ_CHANGE); 384b2e1b302SLuis R. Rodriguez } 385b2e1b302SLuis R. Rodriguez 386b2e1b302SLuis R. Rodriguez /* Used by nl80211 before kmalloc'ing our regulatory domain */ 387a3d2eaf0SJohannes Berg bool reg_is_valid_request(const char *alpha2) 388b2e1b302SLuis R. Rodriguez { 38961405e97SLuis R. Rodriguez assert_cfg80211_lock(); 39061405e97SLuis R. Rodriguez 391f6037d09SJohannes Berg if (!last_request) 392f6037d09SJohannes Berg return false; 393f6037d09SJohannes Berg 394f6037d09SJohannes Berg return alpha2_equal(last_request->alpha2, alpha2); 395b2e1b302SLuis R. Rodriguez } 396b2e1b302SLuis R. Rodriguez 397b2e1b302SLuis R. Rodriguez /* Sanity check on a regulatory rule */ 398a3d2eaf0SJohannes Berg static bool is_valid_reg_rule(const struct ieee80211_reg_rule *rule) 399b2e1b302SLuis R. Rodriguez { 400a3d2eaf0SJohannes Berg const struct ieee80211_freq_range *freq_range = &rule->freq_range; 401b2e1b302SLuis R. Rodriguez u32 freq_diff; 402b2e1b302SLuis R. Rodriguez 40391e99004SLuis R. Rodriguez if (freq_range->start_freq_khz <= 0 || freq_range->end_freq_khz <= 0) 404b2e1b302SLuis R. Rodriguez return false; 405b2e1b302SLuis R. Rodriguez 406b2e1b302SLuis R. Rodriguez if (freq_range->start_freq_khz > freq_range->end_freq_khz) 407b2e1b302SLuis R. Rodriguez return false; 408b2e1b302SLuis R. Rodriguez 409b2e1b302SLuis R. Rodriguez freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz; 410b2e1b302SLuis R. Rodriguez 411bd05f28eSRoel Kluin if (freq_range->end_freq_khz <= freq_range->start_freq_khz || 412bd05f28eSRoel Kluin freq_range->max_bandwidth_khz > freq_diff) 413b2e1b302SLuis R. Rodriguez return false; 414b2e1b302SLuis R. Rodriguez 415b2e1b302SLuis R. Rodriguez return true; 416b2e1b302SLuis R. Rodriguez } 417b2e1b302SLuis R. Rodriguez 418a3d2eaf0SJohannes Berg static bool is_valid_rd(const struct ieee80211_regdomain *rd) 419b2e1b302SLuis R. Rodriguez { 420a3d2eaf0SJohannes Berg const struct ieee80211_reg_rule *reg_rule = NULL; 421b2e1b302SLuis R. Rodriguez unsigned int i; 422b2e1b302SLuis R. Rodriguez 423b2e1b302SLuis R. Rodriguez if (!rd->n_reg_rules) 424b2e1b302SLuis R. Rodriguez return false; 425b2e1b302SLuis R. Rodriguez 42688dc1c3fSLuis R. Rodriguez if (WARN_ON(rd->n_reg_rules > NL80211_MAX_SUPP_REG_RULES)) 42788dc1c3fSLuis R. Rodriguez return false; 42888dc1c3fSLuis R. Rodriguez 429b2e1b302SLuis R. Rodriguez for (i = 0; i < rd->n_reg_rules; i++) { 430b2e1b302SLuis R. Rodriguez reg_rule = &rd->reg_rules[i]; 431b2e1b302SLuis R. Rodriguez if (!is_valid_reg_rule(reg_rule)) 432b2e1b302SLuis R. Rodriguez return false; 433b2e1b302SLuis R. Rodriguez } 434b2e1b302SLuis R. Rodriguez 435b2e1b302SLuis R. Rodriguez return true; 436b2e1b302SLuis R. Rodriguez } 437b2e1b302SLuis R. Rodriguez 438038659e7SLuis R. Rodriguez static bool reg_does_bw_fit(const struct ieee80211_freq_range *freq_range, 439038659e7SLuis R. Rodriguez u32 center_freq_khz, 440038659e7SLuis R. Rodriguez u32 bw_khz) 441b2e1b302SLuis R. Rodriguez { 442038659e7SLuis R. Rodriguez u32 start_freq_khz, end_freq_khz; 443038659e7SLuis R. Rodriguez 444038659e7SLuis R. Rodriguez start_freq_khz = center_freq_khz - (bw_khz/2); 445038659e7SLuis R. Rodriguez end_freq_khz = center_freq_khz + (bw_khz/2); 446038659e7SLuis R. Rodriguez 447b2e1b302SLuis R. Rodriguez if (start_freq_khz >= freq_range->start_freq_khz && 448b2e1b302SLuis R. Rodriguez end_freq_khz <= freq_range->end_freq_khz) 449038659e7SLuis R. Rodriguez return true; 450038659e7SLuis R. Rodriguez 451038659e7SLuis R. Rodriguez return false; 452b2e1b302SLuis R. Rodriguez } 453b2e1b302SLuis R. Rodriguez 4540c7dc45dSLuis R. Rodriguez /** 4550c7dc45dSLuis R. Rodriguez * freq_in_rule_band - tells us if a frequency is in a frequency band 4560c7dc45dSLuis R. Rodriguez * @freq_range: frequency rule we want to query 4570c7dc45dSLuis R. Rodriguez * @freq_khz: frequency we are inquiring about 4580c7dc45dSLuis R. Rodriguez * 4590c7dc45dSLuis R. Rodriguez * This lets us know if a specific frequency rule is or is not relevant to 4600c7dc45dSLuis R. Rodriguez * a specific frequency's band. Bands are device specific and artificial 4610c7dc45dSLuis R. Rodriguez * definitions (the "2.4 GHz band" and the "5 GHz band"), however it is 4620c7dc45dSLuis R. Rodriguez * safe for now to assume that a frequency rule should not be part of a 4630c7dc45dSLuis R. Rodriguez * frequency's band if the start freq or end freq are off by more than 2 GHz. 4640c7dc45dSLuis R. Rodriguez * This resolution can be lowered and should be considered as we add 4650c7dc45dSLuis R. Rodriguez * regulatory rule support for other "bands". 4660c7dc45dSLuis R. Rodriguez **/ 4670c7dc45dSLuis R. Rodriguez static bool freq_in_rule_band(const struct ieee80211_freq_range *freq_range, 4680c7dc45dSLuis R. Rodriguez u32 freq_khz) 4690c7dc45dSLuis R. Rodriguez { 4700c7dc45dSLuis R. Rodriguez #define ONE_GHZ_IN_KHZ 1000000 4710c7dc45dSLuis R. Rodriguez if (abs(freq_khz - freq_range->start_freq_khz) <= (2 * ONE_GHZ_IN_KHZ)) 4720c7dc45dSLuis R. Rodriguez return true; 4730c7dc45dSLuis R. Rodriguez if (abs(freq_khz - freq_range->end_freq_khz) <= (2 * ONE_GHZ_IN_KHZ)) 4740c7dc45dSLuis R. Rodriguez return true; 4750c7dc45dSLuis R. Rodriguez return false; 4760c7dc45dSLuis R. Rodriguez #undef ONE_GHZ_IN_KHZ 4770c7dc45dSLuis R. Rodriguez } 4780c7dc45dSLuis R. Rodriguez 479fb1fc7adSLuis R. Rodriguez /* 480fb1fc7adSLuis R. Rodriguez * Helper for regdom_intersect(), this does the real 481fb1fc7adSLuis R. Rodriguez * mathematical intersection fun 482fb1fc7adSLuis R. Rodriguez */ 4839c96477dSLuis R. Rodriguez static int reg_rules_intersect( 4849c96477dSLuis R. Rodriguez const struct ieee80211_reg_rule *rule1, 4859c96477dSLuis R. Rodriguez const struct ieee80211_reg_rule *rule2, 4869c96477dSLuis R. Rodriguez struct ieee80211_reg_rule *intersected_rule) 4879c96477dSLuis R. Rodriguez { 4889c96477dSLuis R. Rodriguez const struct ieee80211_freq_range *freq_range1, *freq_range2; 4899c96477dSLuis R. Rodriguez struct ieee80211_freq_range *freq_range; 4909c96477dSLuis R. Rodriguez const struct ieee80211_power_rule *power_rule1, *power_rule2; 4919c96477dSLuis R. Rodriguez struct ieee80211_power_rule *power_rule; 4929c96477dSLuis R. Rodriguez u32 freq_diff; 4939c96477dSLuis R. Rodriguez 4949c96477dSLuis R. Rodriguez freq_range1 = &rule1->freq_range; 4959c96477dSLuis R. Rodriguez freq_range2 = &rule2->freq_range; 4969c96477dSLuis R. Rodriguez freq_range = &intersected_rule->freq_range; 4979c96477dSLuis R. Rodriguez 4989c96477dSLuis R. Rodriguez power_rule1 = &rule1->power_rule; 4999c96477dSLuis R. Rodriguez power_rule2 = &rule2->power_rule; 5009c96477dSLuis R. Rodriguez power_rule = &intersected_rule->power_rule; 5019c96477dSLuis R. Rodriguez 5029c96477dSLuis R. Rodriguez freq_range->start_freq_khz = max(freq_range1->start_freq_khz, 5039c96477dSLuis R. Rodriguez freq_range2->start_freq_khz); 5049c96477dSLuis R. Rodriguez freq_range->end_freq_khz = min(freq_range1->end_freq_khz, 5059c96477dSLuis R. Rodriguez freq_range2->end_freq_khz); 5069c96477dSLuis R. Rodriguez freq_range->max_bandwidth_khz = min(freq_range1->max_bandwidth_khz, 5079c96477dSLuis R. Rodriguez freq_range2->max_bandwidth_khz); 5089c96477dSLuis R. Rodriguez 5099c96477dSLuis R. Rodriguez freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz; 5109c96477dSLuis R. Rodriguez if (freq_range->max_bandwidth_khz > freq_diff) 5119c96477dSLuis R. Rodriguez freq_range->max_bandwidth_khz = freq_diff; 5129c96477dSLuis R. Rodriguez 5139c96477dSLuis R. Rodriguez power_rule->max_eirp = min(power_rule1->max_eirp, 5149c96477dSLuis R. Rodriguez power_rule2->max_eirp); 5159c96477dSLuis R. Rodriguez power_rule->max_antenna_gain = min(power_rule1->max_antenna_gain, 5169c96477dSLuis R. Rodriguez power_rule2->max_antenna_gain); 5179c96477dSLuis R. Rodriguez 5189c96477dSLuis R. Rodriguez intersected_rule->flags = (rule1->flags | rule2->flags); 5199c96477dSLuis R. Rodriguez 5209c96477dSLuis R. Rodriguez if (!is_valid_reg_rule(intersected_rule)) 5219c96477dSLuis R. Rodriguez return -EINVAL; 5229c96477dSLuis R. Rodriguez 5239c96477dSLuis R. Rodriguez return 0; 5249c96477dSLuis R. Rodriguez } 5259c96477dSLuis R. Rodriguez 5269c96477dSLuis R. Rodriguez /** 5279c96477dSLuis R. Rodriguez * regdom_intersect - do the intersection between two regulatory domains 5289c96477dSLuis R. Rodriguez * @rd1: first regulatory domain 5299c96477dSLuis R. Rodriguez * @rd2: second regulatory domain 5309c96477dSLuis R. Rodriguez * 5319c96477dSLuis R. Rodriguez * Use this function to get the intersection between two regulatory domains. 5329c96477dSLuis R. Rodriguez * Once completed we will mark the alpha2 for the rd as intersected, "98", 5339c96477dSLuis R. Rodriguez * as no one single alpha2 can represent this regulatory domain. 5349c96477dSLuis R. Rodriguez * 5359c96477dSLuis R. Rodriguez * Returns a pointer to the regulatory domain structure which will hold the 5369c96477dSLuis R. Rodriguez * resulting intersection of rules between rd1 and rd2. We will 5379c96477dSLuis R. Rodriguez * kzalloc() this structure for you. 5389c96477dSLuis R. Rodriguez */ 5399c96477dSLuis R. Rodriguez static struct ieee80211_regdomain *regdom_intersect( 5409c96477dSLuis R. Rodriguez const struct ieee80211_regdomain *rd1, 5419c96477dSLuis R. Rodriguez const struct ieee80211_regdomain *rd2) 5429c96477dSLuis R. Rodriguez { 5439c96477dSLuis R. Rodriguez int r, size_of_regd; 5449c96477dSLuis R. Rodriguez unsigned int x, y; 5459c96477dSLuis R. Rodriguez unsigned int num_rules = 0, rule_idx = 0; 5469c96477dSLuis R. Rodriguez const struct ieee80211_reg_rule *rule1, *rule2; 5479c96477dSLuis R. Rodriguez struct ieee80211_reg_rule *intersected_rule; 5489c96477dSLuis R. Rodriguez struct ieee80211_regdomain *rd; 5499c96477dSLuis R. Rodriguez /* This is just a dummy holder to help us count */ 5509c96477dSLuis R. Rodriguez struct ieee80211_reg_rule irule; 5519c96477dSLuis R. Rodriguez 5529c96477dSLuis R. Rodriguez /* Uses the stack temporarily for counter arithmetic */ 5539c96477dSLuis R. Rodriguez intersected_rule = &irule; 5549c96477dSLuis R. Rodriguez 5559c96477dSLuis R. Rodriguez memset(intersected_rule, 0, sizeof(struct ieee80211_reg_rule)); 5569c96477dSLuis R. Rodriguez 5579c96477dSLuis R. Rodriguez if (!rd1 || !rd2) 5589c96477dSLuis R. Rodriguez return NULL; 5599c96477dSLuis R. Rodriguez 560fb1fc7adSLuis R. Rodriguez /* 561fb1fc7adSLuis R. Rodriguez * First we get a count of the rules we'll need, then we actually 5629c96477dSLuis R. Rodriguez * build them. This is to so we can malloc() and free() a 5639c96477dSLuis R. Rodriguez * regdomain once. The reason we use reg_rules_intersect() here 5649c96477dSLuis R. Rodriguez * is it will return -EINVAL if the rule computed makes no sense. 565fb1fc7adSLuis R. Rodriguez * All rules that do check out OK are valid. 566fb1fc7adSLuis R. Rodriguez */ 5679c96477dSLuis R. Rodriguez 5689c96477dSLuis R. Rodriguez for (x = 0; x < rd1->n_reg_rules; x++) { 5699c96477dSLuis R. Rodriguez rule1 = &rd1->reg_rules[x]; 5709c96477dSLuis R. Rodriguez for (y = 0; y < rd2->n_reg_rules; y++) { 5719c96477dSLuis R. Rodriguez rule2 = &rd2->reg_rules[y]; 5729c96477dSLuis R. Rodriguez if (!reg_rules_intersect(rule1, rule2, 5739c96477dSLuis R. Rodriguez intersected_rule)) 5749c96477dSLuis R. Rodriguez num_rules++; 5759c96477dSLuis R. Rodriguez memset(intersected_rule, 0, 5769c96477dSLuis R. Rodriguez sizeof(struct ieee80211_reg_rule)); 5779c96477dSLuis R. Rodriguez } 5789c96477dSLuis R. Rodriguez } 5799c96477dSLuis R. Rodriguez 5809c96477dSLuis R. Rodriguez if (!num_rules) 5819c96477dSLuis R. Rodriguez return NULL; 5829c96477dSLuis R. Rodriguez 5839c96477dSLuis R. Rodriguez size_of_regd = sizeof(struct ieee80211_regdomain) + 5849c96477dSLuis R. Rodriguez ((num_rules + 1) * sizeof(struct ieee80211_reg_rule)); 5859c96477dSLuis R. Rodriguez 5869c96477dSLuis R. Rodriguez rd = kzalloc(size_of_regd, GFP_KERNEL); 5879c96477dSLuis R. Rodriguez if (!rd) 5889c96477dSLuis R. Rodriguez return NULL; 5899c96477dSLuis R. Rodriguez 5909c96477dSLuis R. Rodriguez for (x = 0; x < rd1->n_reg_rules; x++) { 5919c96477dSLuis R. Rodriguez rule1 = &rd1->reg_rules[x]; 5929c96477dSLuis R. Rodriguez for (y = 0; y < rd2->n_reg_rules; y++) { 5939c96477dSLuis R. Rodriguez rule2 = &rd2->reg_rules[y]; 594fb1fc7adSLuis R. Rodriguez /* 595fb1fc7adSLuis R. Rodriguez * This time around instead of using the stack lets 5969c96477dSLuis R. Rodriguez * write to the target rule directly saving ourselves 597fb1fc7adSLuis R. Rodriguez * a memcpy() 598fb1fc7adSLuis R. Rodriguez */ 5999c96477dSLuis R. Rodriguez intersected_rule = &rd->reg_rules[rule_idx]; 6009c96477dSLuis R. Rodriguez r = reg_rules_intersect(rule1, rule2, 6019c96477dSLuis R. Rodriguez intersected_rule); 602fb1fc7adSLuis R. Rodriguez /* 603fb1fc7adSLuis R. Rodriguez * No need to memset here the intersected rule here as 604fb1fc7adSLuis R. Rodriguez * we're not using the stack anymore 605fb1fc7adSLuis R. Rodriguez */ 6069c96477dSLuis R. Rodriguez if (r) 6079c96477dSLuis R. Rodriguez continue; 6089c96477dSLuis R. Rodriguez rule_idx++; 6099c96477dSLuis R. Rodriguez } 6109c96477dSLuis R. Rodriguez } 6119c96477dSLuis R. Rodriguez 6129c96477dSLuis R. Rodriguez if (rule_idx != num_rules) { 6139c96477dSLuis R. Rodriguez kfree(rd); 6149c96477dSLuis R. Rodriguez return NULL; 6159c96477dSLuis R. Rodriguez } 6169c96477dSLuis R. Rodriguez 6179c96477dSLuis R. Rodriguez rd->n_reg_rules = num_rules; 6189c96477dSLuis R. Rodriguez rd->alpha2[0] = '9'; 6199c96477dSLuis R. Rodriguez rd->alpha2[1] = '8'; 6209c96477dSLuis R. Rodriguez 6219c96477dSLuis R. Rodriguez return rd; 6229c96477dSLuis R. Rodriguez } 6239c96477dSLuis R. Rodriguez 624fb1fc7adSLuis R. Rodriguez /* 625fb1fc7adSLuis R. Rodriguez * XXX: add support for the rest of enum nl80211_reg_rule_flags, we may 626fb1fc7adSLuis R. Rodriguez * want to just have the channel structure use these 627fb1fc7adSLuis R. Rodriguez */ 628b2e1b302SLuis R. Rodriguez static u32 map_regdom_flags(u32 rd_flags) 629b2e1b302SLuis R. Rodriguez { 630b2e1b302SLuis R. Rodriguez u32 channel_flags = 0; 631b2e1b302SLuis R. Rodriguez if (rd_flags & NL80211_RRF_PASSIVE_SCAN) 632b2e1b302SLuis R. Rodriguez channel_flags |= IEEE80211_CHAN_PASSIVE_SCAN; 633b2e1b302SLuis R. Rodriguez if (rd_flags & NL80211_RRF_NO_IBSS) 634b2e1b302SLuis R. Rodriguez channel_flags |= IEEE80211_CHAN_NO_IBSS; 635b2e1b302SLuis R. Rodriguez if (rd_flags & NL80211_RRF_DFS) 636b2e1b302SLuis R. Rodriguez channel_flags |= IEEE80211_CHAN_RADAR; 637b2e1b302SLuis R. Rodriguez return channel_flags; 638b2e1b302SLuis R. Rodriguez } 639b2e1b302SLuis R. Rodriguez 6401fa25e41SLuis R. Rodriguez static int freq_reg_info_regd(struct wiphy *wiphy, 6411fa25e41SLuis R. Rodriguez u32 center_freq, 642038659e7SLuis R. Rodriguez u32 desired_bw_khz, 6431fa25e41SLuis R. Rodriguez const struct ieee80211_reg_rule **reg_rule, 6441fa25e41SLuis R. Rodriguez const struct ieee80211_regdomain *custom_regd) 6458318d78aSJohannes Berg { 6468318d78aSJohannes Berg int i; 6470c7dc45dSLuis R. Rodriguez bool band_rule_found = false; 6483e0c3ff3SLuis R. Rodriguez const struct ieee80211_regdomain *regd; 649038659e7SLuis R. Rodriguez bool bw_fits = false; 650038659e7SLuis R. Rodriguez 651038659e7SLuis R. Rodriguez if (!desired_bw_khz) 652038659e7SLuis R. Rodriguez desired_bw_khz = MHZ_TO_KHZ(20); 6538318d78aSJohannes Berg 6541fa25e41SLuis R. Rodriguez regd = custom_regd ? custom_regd : cfg80211_regdomain; 6553e0c3ff3SLuis R. Rodriguez 656fb1fc7adSLuis R. Rodriguez /* 657fb1fc7adSLuis R. Rodriguez * Follow the driver's regulatory domain, if present, unless a country 658fb1fc7adSLuis R. Rodriguez * IE has been processed or a user wants to help complaince further 659fb1fc7adSLuis R. Rodriguez */ 6602784fe91SLuis R. Rodriguez if (!custom_regd && 6612784fe91SLuis R. Rodriguez last_request->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && 6627db90f4aSLuis R. Rodriguez last_request->initiator != NL80211_REGDOM_SET_BY_USER && 6633e0c3ff3SLuis R. Rodriguez wiphy->regd) 6643e0c3ff3SLuis R. Rodriguez regd = wiphy->regd; 6653e0c3ff3SLuis R. Rodriguez 6663e0c3ff3SLuis R. Rodriguez if (!regd) 667b2e1b302SLuis R. Rodriguez return -EINVAL; 668b2e1b302SLuis R. Rodriguez 6693e0c3ff3SLuis R. Rodriguez for (i = 0; i < regd->n_reg_rules; i++) { 670b2e1b302SLuis R. Rodriguez const struct ieee80211_reg_rule *rr; 671b2e1b302SLuis R. Rodriguez const struct ieee80211_freq_range *fr = NULL; 672b2e1b302SLuis R. Rodriguez const struct ieee80211_power_rule *pr = NULL; 673b2e1b302SLuis R. Rodriguez 6743e0c3ff3SLuis R. Rodriguez rr = ®d->reg_rules[i]; 675b2e1b302SLuis R. Rodriguez fr = &rr->freq_range; 676b2e1b302SLuis R. Rodriguez pr = &rr->power_rule; 6770c7dc45dSLuis R. Rodriguez 678fb1fc7adSLuis R. Rodriguez /* 679fb1fc7adSLuis R. Rodriguez * We only need to know if one frequency rule was 6800c7dc45dSLuis R. Rodriguez * was in center_freq's band, that's enough, so lets 681fb1fc7adSLuis R. Rodriguez * not overwrite it once found 682fb1fc7adSLuis R. Rodriguez */ 6830c7dc45dSLuis R. Rodriguez if (!band_rule_found) 6840c7dc45dSLuis R. Rodriguez band_rule_found = freq_in_rule_band(fr, center_freq); 6850c7dc45dSLuis R. Rodriguez 686038659e7SLuis R. Rodriguez bw_fits = reg_does_bw_fit(fr, 687038659e7SLuis R. Rodriguez center_freq, 688038659e7SLuis R. Rodriguez desired_bw_khz); 6890c7dc45dSLuis R. Rodriguez 690038659e7SLuis R. Rodriguez if (band_rule_found && bw_fits) { 691b2e1b302SLuis R. Rodriguez *reg_rule = rr; 692038659e7SLuis R. Rodriguez return 0; 6938318d78aSJohannes Berg } 6948318d78aSJohannes Berg } 6958318d78aSJohannes Berg 6960c7dc45dSLuis R. Rodriguez if (!band_rule_found) 6970c7dc45dSLuis R. Rodriguez return -ERANGE; 6980c7dc45dSLuis R. Rodriguez 699038659e7SLuis R. Rodriguez return -EINVAL; 700b2e1b302SLuis R. Rodriguez } 701b2e1b302SLuis R. Rodriguez 702038659e7SLuis R. Rodriguez int freq_reg_info(struct wiphy *wiphy, 703038659e7SLuis R. Rodriguez u32 center_freq, 704038659e7SLuis R. Rodriguez u32 desired_bw_khz, 7051fa25e41SLuis R. Rodriguez const struct ieee80211_reg_rule **reg_rule) 7061fa25e41SLuis R. Rodriguez { 707ac46d48eSLuis R. Rodriguez assert_cfg80211_lock(); 708038659e7SLuis R. Rodriguez return freq_reg_info_regd(wiphy, 709038659e7SLuis R. Rodriguez center_freq, 710038659e7SLuis R. Rodriguez desired_bw_khz, 711038659e7SLuis R. Rodriguez reg_rule, 712038659e7SLuis R. Rodriguez NULL); 7131fa25e41SLuis R. Rodriguez } 7144f366c5dSJohn W. Linville EXPORT_SYMBOL(freq_reg_info); 715b2e1b302SLuis R. Rodriguez 716926a0a09SLuis R. Rodriguez #ifdef CONFIG_CFG80211_REG_DEBUG 717926a0a09SLuis R. Rodriguez static const char *reg_initiator_name(enum nl80211_reg_initiator initiator) 718926a0a09SLuis R. Rodriguez { 719926a0a09SLuis R. Rodriguez switch (initiator) { 720926a0a09SLuis R. Rodriguez case NL80211_REGDOM_SET_BY_CORE: 721926a0a09SLuis R. Rodriguez return "Set by core"; 722926a0a09SLuis R. Rodriguez case NL80211_REGDOM_SET_BY_USER: 723926a0a09SLuis R. Rodriguez return "Set by user"; 724926a0a09SLuis R. Rodriguez case NL80211_REGDOM_SET_BY_DRIVER: 725926a0a09SLuis R. Rodriguez return "Set by driver"; 726926a0a09SLuis R. Rodriguez case NL80211_REGDOM_SET_BY_COUNTRY_IE: 727926a0a09SLuis R. Rodriguez return "Set by country IE"; 728926a0a09SLuis R. Rodriguez default: 729926a0a09SLuis R. Rodriguez WARN_ON(1); 730926a0a09SLuis R. Rodriguez return "Set by bug"; 731926a0a09SLuis R. Rodriguez } 732926a0a09SLuis R. Rodriguez } 733e702d3cfSLuis R. Rodriguez 734e702d3cfSLuis R. Rodriguez static void chan_reg_rule_print_dbg(struct ieee80211_channel *chan, 735e702d3cfSLuis R. Rodriguez u32 desired_bw_khz, 736e702d3cfSLuis R. Rodriguez const struct ieee80211_reg_rule *reg_rule) 737e702d3cfSLuis R. Rodriguez { 738e702d3cfSLuis R. Rodriguez const struct ieee80211_power_rule *power_rule; 739e702d3cfSLuis R. Rodriguez const struct ieee80211_freq_range *freq_range; 740e702d3cfSLuis R. Rodriguez char max_antenna_gain[32]; 741e702d3cfSLuis R. Rodriguez 742e702d3cfSLuis R. Rodriguez power_rule = ®_rule->power_rule; 743e702d3cfSLuis R. Rodriguez freq_range = ®_rule->freq_range; 744e702d3cfSLuis R. Rodriguez 745e702d3cfSLuis R. Rodriguez if (!power_rule->max_antenna_gain) 746e702d3cfSLuis R. Rodriguez snprintf(max_antenna_gain, 32, "N/A"); 747e702d3cfSLuis R. Rodriguez else 748e702d3cfSLuis R. Rodriguez snprintf(max_antenna_gain, 32, "%d", power_rule->max_antenna_gain); 749e702d3cfSLuis R. Rodriguez 750d91e41b6SLuis R. Rodriguez REG_DBG_PRINT("Updating information on frequency %d MHz " 751ff039c6fSBob Copeland "for a %d MHz width channel with regulatory rule:\n", 752e702d3cfSLuis R. Rodriguez chan->center_freq, 753e702d3cfSLuis R. Rodriguez KHZ_TO_MHZ(desired_bw_khz)); 754e702d3cfSLuis R. Rodriguez 755d91e41b6SLuis R. Rodriguez REG_DBG_PRINT("%d KHz - %d KHz @ KHz), (%s mBi, %d mBm)\n", 756e702d3cfSLuis R. Rodriguez freq_range->start_freq_khz, 757e702d3cfSLuis R. Rodriguez freq_range->end_freq_khz, 758e702d3cfSLuis R. Rodriguez max_antenna_gain, 759e702d3cfSLuis R. Rodriguez power_rule->max_eirp); 760e702d3cfSLuis R. Rodriguez } 761e702d3cfSLuis R. Rodriguez #else 762e702d3cfSLuis R. Rodriguez static void chan_reg_rule_print_dbg(struct ieee80211_channel *chan, 763e702d3cfSLuis R. Rodriguez u32 desired_bw_khz, 764e702d3cfSLuis R. Rodriguez const struct ieee80211_reg_rule *reg_rule) 765e702d3cfSLuis R. Rodriguez { 766e702d3cfSLuis R. Rodriguez return; 767e702d3cfSLuis R. Rodriguez } 768926a0a09SLuis R. Rodriguez #endif 769926a0a09SLuis R. Rodriguez 770038659e7SLuis R. Rodriguez /* 771038659e7SLuis R. Rodriguez * Note that right now we assume the desired channel bandwidth 772038659e7SLuis R. Rodriguez * is always 20 MHz for each individual channel (HT40 uses 20 MHz 773038659e7SLuis R. Rodriguez * per channel, the primary and the extension channel). To support 774038659e7SLuis R. Rodriguez * smaller custom bandwidths such as 5 MHz or 10 MHz we'll need a 775038659e7SLuis R. Rodriguez * new ieee80211_channel.target_bw and re run the regulatory check 776038659e7SLuis R. Rodriguez * on the wiphy with the target_bw specified. Then we can simply use 777038659e7SLuis R. Rodriguez * that below for the desired_bw_khz below. 778038659e7SLuis R. Rodriguez */ 7797ca43d03SLuis R. Rodriguez static void handle_channel(struct wiphy *wiphy, 7807ca43d03SLuis R. Rodriguez enum nl80211_reg_initiator initiator, 7817ca43d03SLuis R. Rodriguez enum ieee80211_band band, 782a92a3ce7SLuis R. Rodriguez unsigned int chan_idx) 783b2e1b302SLuis R. Rodriguez { 784b2e1b302SLuis R. Rodriguez int r; 785038659e7SLuis R. Rodriguez u32 flags, bw_flags = 0; 786038659e7SLuis R. Rodriguez u32 desired_bw_khz = MHZ_TO_KHZ(20); 787b2e1b302SLuis R. Rodriguez const struct ieee80211_reg_rule *reg_rule = NULL; 788b2e1b302SLuis R. Rodriguez const struct ieee80211_power_rule *power_rule = NULL; 789038659e7SLuis R. Rodriguez const struct ieee80211_freq_range *freq_range = NULL; 790a92a3ce7SLuis R. Rodriguez struct ieee80211_supported_band *sband; 791a92a3ce7SLuis R. Rodriguez struct ieee80211_channel *chan; 792fe33eb39SLuis R. Rodriguez struct wiphy *request_wiphy = NULL; 793a92a3ce7SLuis R. Rodriguez 794761cf7ecSLuis R. Rodriguez assert_cfg80211_lock(); 795761cf7ecSLuis R. Rodriguez 796806a9e39SLuis R. Rodriguez request_wiphy = wiphy_idx_to_wiphy(last_request->wiphy_idx); 797806a9e39SLuis R. Rodriguez 798a92a3ce7SLuis R. Rodriguez sband = wiphy->bands[band]; 799a92a3ce7SLuis R. Rodriguez BUG_ON(chan_idx >= sband->n_channels); 800a92a3ce7SLuis R. Rodriguez chan = &sband->channels[chan_idx]; 801a92a3ce7SLuis R. Rodriguez 802a92a3ce7SLuis R. Rodriguez flags = chan->orig_flags; 803b2e1b302SLuis R. Rodriguez 804038659e7SLuis R. Rodriguez r = freq_reg_info(wiphy, 805038659e7SLuis R. Rodriguez MHZ_TO_KHZ(chan->center_freq), 806038659e7SLuis R. Rodriguez desired_bw_khz, 807038659e7SLuis R. Rodriguez ®_rule); 808b2e1b302SLuis R. Rodriguez 809ca4ffe8fSLuis R. Rodriguez if (r) { 810ca4ffe8fSLuis R. Rodriguez /* 811ca4ffe8fSLuis R. Rodriguez * We will disable all channels that do not match our 81225985edcSLucas De Marchi * received regulatory rule unless the hint is coming 813ca4ffe8fSLuis R. Rodriguez * from a Country IE and the Country IE had no information 814ca4ffe8fSLuis R. Rodriguez * about a band. The IEEE 802.11 spec allows for an AP 815ca4ffe8fSLuis R. Rodriguez * to send only a subset of the regulatory rules allowed, 816ca4ffe8fSLuis R. Rodriguez * so an AP in the US that only supports 2.4 GHz may only send 817ca4ffe8fSLuis R. Rodriguez * a country IE with information for the 2.4 GHz band 818ca4ffe8fSLuis R. Rodriguez * while 5 GHz is still supported. 819ca4ffe8fSLuis R. Rodriguez */ 820ca4ffe8fSLuis R. Rodriguez if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE && 821ca4ffe8fSLuis R. Rodriguez r == -ERANGE) 8228318d78aSJohannes Berg return; 8238318d78aSJohannes Berg 824d91e41b6SLuis R. Rodriguez REG_DBG_PRINT("Disabling freq %d MHz\n", chan->center_freq); 825ca4ffe8fSLuis R. Rodriguez chan->flags = IEEE80211_CHAN_DISABLED; 826ca4ffe8fSLuis R. Rodriguez return; 827ca4ffe8fSLuis R. Rodriguez } 828ca4ffe8fSLuis R. Rodriguez 829e702d3cfSLuis R. Rodriguez chan_reg_rule_print_dbg(chan, desired_bw_khz, reg_rule); 830e702d3cfSLuis R. Rodriguez 831b2e1b302SLuis R. Rodriguez power_rule = ®_rule->power_rule; 832038659e7SLuis R. Rodriguez freq_range = ®_rule->freq_range; 833038659e7SLuis R. Rodriguez 834038659e7SLuis R. Rodriguez if (freq_range->max_bandwidth_khz < MHZ_TO_KHZ(40)) 835038659e7SLuis R. Rodriguez bw_flags = IEEE80211_CHAN_NO_HT40; 836b2e1b302SLuis R. Rodriguez 8377db90f4aSLuis R. Rodriguez if (last_request->initiator == NL80211_REGDOM_SET_BY_DRIVER && 838806a9e39SLuis R. Rodriguez request_wiphy && request_wiphy == wiphy && 8395be83de5SJohannes Berg request_wiphy->flags & WIPHY_FLAG_STRICT_REGULATORY) { 840fb1fc7adSLuis R. Rodriguez /* 84125985edcSLucas De Marchi * This guarantees the driver's requested regulatory domain 842f976376dSLuis R. Rodriguez * will always be used as a base for further regulatory 843fb1fc7adSLuis R. Rodriguez * settings 844fb1fc7adSLuis R. Rodriguez */ 845f976376dSLuis R. Rodriguez chan->flags = chan->orig_flags = 846038659e7SLuis R. Rodriguez map_regdom_flags(reg_rule->flags) | bw_flags; 847f976376dSLuis R. Rodriguez chan->max_antenna_gain = chan->orig_mag = 848f976376dSLuis R. Rodriguez (int) MBI_TO_DBI(power_rule->max_antenna_gain); 849f976376dSLuis R. Rodriguez chan->max_power = chan->orig_mpwr = 850f976376dSLuis R. Rodriguez (int) MBM_TO_DBM(power_rule->max_eirp); 851f976376dSLuis R. Rodriguez return; 852f976376dSLuis R. Rodriguez } 853f976376dSLuis R. Rodriguez 854038659e7SLuis R. Rodriguez chan->flags = flags | bw_flags | map_regdom_flags(reg_rule->flags); 8558318d78aSJohannes Berg chan->max_antenna_gain = min(chan->orig_mag, 856b2e1b302SLuis R. Rodriguez (int) MBI_TO_DBI(power_rule->max_antenna_gain)); 857253898c4SJohn W. Linville if (chan->orig_mpwr) 858b2e1b302SLuis R. Rodriguez chan->max_power = min(chan->orig_mpwr, 859b2e1b302SLuis R. Rodriguez (int) MBM_TO_DBM(power_rule->max_eirp)); 860253898c4SJohn W. Linville else 861b2e1b302SLuis R. Rodriguez chan->max_power = (int) MBM_TO_DBM(power_rule->max_eirp); 8628318d78aSJohannes Berg } 8638318d78aSJohannes Berg 8647ca43d03SLuis R. Rodriguez static void handle_band(struct wiphy *wiphy, 8657ca43d03SLuis R. Rodriguez enum ieee80211_band band, 8667ca43d03SLuis R. Rodriguez enum nl80211_reg_initiator initiator) 8678318d78aSJohannes Berg { 868a92a3ce7SLuis R. Rodriguez unsigned int i; 869a92a3ce7SLuis R. Rodriguez struct ieee80211_supported_band *sband; 870a92a3ce7SLuis R. Rodriguez 871a92a3ce7SLuis R. Rodriguez BUG_ON(!wiphy->bands[band]); 872a92a3ce7SLuis R. Rodriguez sband = wiphy->bands[band]; 8738318d78aSJohannes Berg 8748318d78aSJohannes Berg for (i = 0; i < sband->n_channels; i++) 8757ca43d03SLuis R. Rodriguez handle_channel(wiphy, initiator, band, i); 8768318d78aSJohannes Berg } 8778318d78aSJohannes Berg 8787db90f4aSLuis R. Rodriguez static bool ignore_reg_update(struct wiphy *wiphy, 8797db90f4aSLuis R. Rodriguez enum nl80211_reg_initiator initiator) 88014b9815aSLuis R. Rodriguez { 881926a0a09SLuis R. Rodriguez if (!last_request) { 882d91e41b6SLuis R. Rodriguez REG_DBG_PRINT("Ignoring regulatory request %s since " 883926a0a09SLuis R. Rodriguez "last_request is not set\n", 884926a0a09SLuis R. Rodriguez reg_initiator_name(initiator)); 88514b9815aSLuis R. Rodriguez return true; 886926a0a09SLuis R. Rodriguez } 887926a0a09SLuis R. Rodriguez 8887db90f4aSLuis R. Rodriguez if (initiator == NL80211_REGDOM_SET_BY_CORE && 889926a0a09SLuis R. Rodriguez wiphy->flags & WIPHY_FLAG_CUSTOM_REGULATORY) { 890d91e41b6SLuis R. Rodriguez REG_DBG_PRINT("Ignoring regulatory request %s " 891926a0a09SLuis R. Rodriguez "since the driver uses its own custom " 892926a0a09SLuis R. Rodriguez "regulatory domain ", 893926a0a09SLuis R. Rodriguez reg_initiator_name(initiator)); 89414b9815aSLuis R. Rodriguez return true; 895926a0a09SLuis R. Rodriguez } 896926a0a09SLuis R. Rodriguez 897fb1fc7adSLuis R. Rodriguez /* 898fb1fc7adSLuis R. Rodriguez * wiphy->regd will be set once the device has its own 899fb1fc7adSLuis R. Rodriguez * desired regulatory domain set 900fb1fc7adSLuis R. Rodriguez */ 9015be83de5SJohannes Berg if (wiphy->flags & WIPHY_FLAG_STRICT_REGULATORY && !wiphy->regd && 902749b527bSLuis R. Rodriguez initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && 903926a0a09SLuis R. Rodriguez !is_world_regdom(last_request->alpha2)) { 904d91e41b6SLuis R. Rodriguez REG_DBG_PRINT("Ignoring regulatory request %s " 905926a0a09SLuis R. Rodriguez "since the driver requires its own regulaotry " 906926a0a09SLuis R. Rodriguez "domain to be set first", 907926a0a09SLuis R. Rodriguez reg_initiator_name(initiator)); 90814b9815aSLuis R. Rodriguez return true; 909926a0a09SLuis R. Rodriguez } 910926a0a09SLuis R. Rodriguez 91114b9815aSLuis R. Rodriguez return false; 91214b9815aSLuis R. Rodriguez } 91314b9815aSLuis R. Rodriguez 9147db90f4aSLuis R. Rodriguez static void update_all_wiphy_regulatory(enum nl80211_reg_initiator initiator) 915b2e1b302SLuis R. Rodriguez { 91679c97e97SJohannes Berg struct cfg80211_registered_device *rdev; 917b2e1b302SLuis R. Rodriguez 91879c97e97SJohannes Berg list_for_each_entry(rdev, &cfg80211_rdev_list, list) 91979c97e97SJohannes Berg wiphy_update_regulatory(&rdev->wiphy, initiator); 920b2e1b302SLuis R. Rodriguez } 921b2e1b302SLuis R. Rodriguez 922e38f8a7aSLuis R. Rodriguez static void handle_reg_beacon(struct wiphy *wiphy, 923e38f8a7aSLuis R. Rodriguez unsigned int chan_idx, 924e38f8a7aSLuis R. Rodriguez struct reg_beacon *reg_beacon) 925e38f8a7aSLuis R. Rodriguez { 926e38f8a7aSLuis R. Rodriguez struct ieee80211_supported_band *sband; 927e38f8a7aSLuis R. Rodriguez struct ieee80211_channel *chan; 9286bad8766SLuis R. Rodriguez bool channel_changed = false; 9296bad8766SLuis R. Rodriguez struct ieee80211_channel chan_before; 930e38f8a7aSLuis R. Rodriguez 931e38f8a7aSLuis R. Rodriguez assert_cfg80211_lock(); 932e38f8a7aSLuis R. Rodriguez 933e38f8a7aSLuis R. Rodriguez sband = wiphy->bands[reg_beacon->chan.band]; 934e38f8a7aSLuis R. Rodriguez chan = &sband->channels[chan_idx]; 935e38f8a7aSLuis R. Rodriguez 936e38f8a7aSLuis R. Rodriguez if (likely(chan->center_freq != reg_beacon->chan.center_freq)) 937e38f8a7aSLuis R. Rodriguez return; 938e38f8a7aSLuis R. Rodriguez 9396bad8766SLuis R. Rodriguez if (chan->beacon_found) 9406bad8766SLuis R. Rodriguez return; 9416bad8766SLuis R. Rodriguez 9426bad8766SLuis R. Rodriguez chan->beacon_found = true; 9436bad8766SLuis R. Rodriguez 9445be83de5SJohannes Berg if (wiphy->flags & WIPHY_FLAG_DISABLE_BEACON_HINTS) 94537184244SLuis R. Rodriguez return; 94637184244SLuis R. Rodriguez 9476bad8766SLuis R. Rodriguez chan_before.center_freq = chan->center_freq; 9486bad8766SLuis R. Rodriguez chan_before.flags = chan->flags; 9496bad8766SLuis R. Rodriguez 95037184244SLuis R. Rodriguez if (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN) { 951e38f8a7aSLuis R. Rodriguez chan->flags &= ~IEEE80211_CHAN_PASSIVE_SCAN; 9526bad8766SLuis R. Rodriguez channel_changed = true; 953e38f8a7aSLuis R. Rodriguez } 954e38f8a7aSLuis R. Rodriguez 95537184244SLuis R. Rodriguez if (chan->flags & IEEE80211_CHAN_NO_IBSS) { 956e38f8a7aSLuis R. Rodriguez chan->flags &= ~IEEE80211_CHAN_NO_IBSS; 9576bad8766SLuis R. Rodriguez channel_changed = true; 958e38f8a7aSLuis R. Rodriguez } 959e38f8a7aSLuis R. Rodriguez 9606bad8766SLuis R. Rodriguez if (channel_changed) 9616bad8766SLuis R. Rodriguez nl80211_send_beacon_hint_event(wiphy, &chan_before, chan); 962e38f8a7aSLuis R. Rodriguez } 963e38f8a7aSLuis R. Rodriguez 964e38f8a7aSLuis R. Rodriguez /* 965e38f8a7aSLuis R. Rodriguez * Called when a scan on a wiphy finds a beacon on 966e38f8a7aSLuis R. Rodriguez * new channel 967e38f8a7aSLuis R. Rodriguez */ 968e38f8a7aSLuis R. Rodriguez static void wiphy_update_new_beacon(struct wiphy *wiphy, 969e38f8a7aSLuis R. Rodriguez struct reg_beacon *reg_beacon) 970e38f8a7aSLuis R. Rodriguez { 971e38f8a7aSLuis R. Rodriguez unsigned int i; 972e38f8a7aSLuis R. Rodriguez struct ieee80211_supported_band *sband; 973e38f8a7aSLuis R. Rodriguez 974e38f8a7aSLuis R. Rodriguez assert_cfg80211_lock(); 975e38f8a7aSLuis R. Rodriguez 976e38f8a7aSLuis R. Rodriguez if (!wiphy->bands[reg_beacon->chan.band]) 977e38f8a7aSLuis R. Rodriguez return; 978e38f8a7aSLuis R. Rodriguez 979e38f8a7aSLuis R. Rodriguez sband = wiphy->bands[reg_beacon->chan.band]; 980e38f8a7aSLuis R. Rodriguez 981e38f8a7aSLuis R. Rodriguez for (i = 0; i < sband->n_channels; i++) 982e38f8a7aSLuis R. Rodriguez handle_reg_beacon(wiphy, i, reg_beacon); 983e38f8a7aSLuis R. Rodriguez } 984e38f8a7aSLuis R. Rodriguez 985e38f8a7aSLuis R. Rodriguez /* 986e38f8a7aSLuis R. Rodriguez * Called upon reg changes or a new wiphy is added 987e38f8a7aSLuis R. Rodriguez */ 988e38f8a7aSLuis R. Rodriguez static void wiphy_update_beacon_reg(struct wiphy *wiphy) 989e38f8a7aSLuis R. Rodriguez { 990e38f8a7aSLuis R. Rodriguez unsigned int i; 991e38f8a7aSLuis R. Rodriguez struct ieee80211_supported_band *sband; 992e38f8a7aSLuis R. Rodriguez struct reg_beacon *reg_beacon; 993e38f8a7aSLuis R. Rodriguez 994e38f8a7aSLuis R. Rodriguez assert_cfg80211_lock(); 995e38f8a7aSLuis R. Rodriguez 996e38f8a7aSLuis R. Rodriguez if (list_empty(®_beacon_list)) 997e38f8a7aSLuis R. Rodriguez return; 998e38f8a7aSLuis R. Rodriguez 999e38f8a7aSLuis R. Rodriguez list_for_each_entry(reg_beacon, ®_beacon_list, list) { 1000e38f8a7aSLuis R. Rodriguez if (!wiphy->bands[reg_beacon->chan.band]) 1001e38f8a7aSLuis R. Rodriguez continue; 1002e38f8a7aSLuis R. Rodriguez sband = wiphy->bands[reg_beacon->chan.band]; 1003e38f8a7aSLuis R. Rodriguez for (i = 0; i < sband->n_channels; i++) 1004e38f8a7aSLuis R. Rodriguez handle_reg_beacon(wiphy, i, reg_beacon); 1005e38f8a7aSLuis R. Rodriguez } 1006e38f8a7aSLuis R. Rodriguez } 1007e38f8a7aSLuis R. Rodriguez 1008e38f8a7aSLuis R. Rodriguez static bool reg_is_world_roaming(struct wiphy *wiphy) 1009e38f8a7aSLuis R. Rodriguez { 1010e38f8a7aSLuis R. Rodriguez if (is_world_regdom(cfg80211_regdomain->alpha2) || 1011e38f8a7aSLuis R. Rodriguez (wiphy->regd && is_world_regdom(wiphy->regd->alpha2))) 1012e38f8a7aSLuis R. Rodriguez return true; 1013b1ed8dddSLuis R. Rodriguez if (last_request && 1014b1ed8dddSLuis R. Rodriguez last_request->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && 10155be83de5SJohannes Berg wiphy->flags & WIPHY_FLAG_CUSTOM_REGULATORY) 1016e38f8a7aSLuis R. Rodriguez return true; 1017e38f8a7aSLuis R. Rodriguez return false; 1018e38f8a7aSLuis R. Rodriguez } 1019e38f8a7aSLuis R. Rodriguez 1020e38f8a7aSLuis R. Rodriguez /* Reap the advantages of previously found beacons */ 1021e38f8a7aSLuis R. Rodriguez static void reg_process_beacons(struct wiphy *wiphy) 1022e38f8a7aSLuis R. Rodriguez { 1023b1ed8dddSLuis R. Rodriguez /* 1024b1ed8dddSLuis R. Rodriguez * Means we are just firing up cfg80211, so no beacons would 1025b1ed8dddSLuis R. Rodriguez * have been processed yet. 1026b1ed8dddSLuis R. Rodriguez */ 1027b1ed8dddSLuis R. Rodriguez if (!last_request) 1028b1ed8dddSLuis R. Rodriguez return; 1029e38f8a7aSLuis R. Rodriguez if (!reg_is_world_roaming(wiphy)) 1030e38f8a7aSLuis R. Rodriguez return; 1031e38f8a7aSLuis R. Rodriguez wiphy_update_beacon_reg(wiphy); 1032e38f8a7aSLuis R. Rodriguez } 1033e38f8a7aSLuis R. Rodriguez 1034038659e7SLuis R. Rodriguez static bool is_ht40_not_allowed(struct ieee80211_channel *chan) 1035038659e7SLuis R. Rodriguez { 1036038659e7SLuis R. Rodriguez if (!chan) 1037038659e7SLuis R. Rodriguez return true; 1038038659e7SLuis R. Rodriguez if (chan->flags & IEEE80211_CHAN_DISABLED) 1039038659e7SLuis R. Rodriguez return true; 1040038659e7SLuis R. Rodriguez /* This would happen when regulatory rules disallow HT40 completely */ 1041038659e7SLuis R. Rodriguez if (IEEE80211_CHAN_NO_HT40 == (chan->flags & (IEEE80211_CHAN_NO_HT40))) 1042038659e7SLuis R. Rodriguez return true; 1043038659e7SLuis R. Rodriguez return false; 1044038659e7SLuis R. Rodriguez } 1045038659e7SLuis R. Rodriguez 1046038659e7SLuis R. Rodriguez static void reg_process_ht_flags_channel(struct wiphy *wiphy, 1047038659e7SLuis R. Rodriguez enum ieee80211_band band, 1048038659e7SLuis R. Rodriguez unsigned int chan_idx) 1049038659e7SLuis R. Rodriguez { 1050038659e7SLuis R. Rodriguez struct ieee80211_supported_band *sband; 1051038659e7SLuis R. Rodriguez struct ieee80211_channel *channel; 1052038659e7SLuis R. Rodriguez struct ieee80211_channel *channel_before = NULL, *channel_after = NULL; 1053038659e7SLuis R. Rodriguez unsigned int i; 1054038659e7SLuis R. Rodriguez 1055038659e7SLuis R. Rodriguez assert_cfg80211_lock(); 1056038659e7SLuis R. Rodriguez 1057038659e7SLuis R. Rodriguez sband = wiphy->bands[band]; 1058038659e7SLuis R. Rodriguez BUG_ON(chan_idx >= sband->n_channels); 1059038659e7SLuis R. Rodriguez channel = &sband->channels[chan_idx]; 1060038659e7SLuis R. Rodriguez 1061038659e7SLuis R. Rodriguez if (is_ht40_not_allowed(channel)) { 1062038659e7SLuis R. Rodriguez channel->flags |= IEEE80211_CHAN_NO_HT40; 1063038659e7SLuis R. Rodriguez return; 1064038659e7SLuis R. Rodriguez } 1065038659e7SLuis R. Rodriguez 1066038659e7SLuis R. Rodriguez /* 1067038659e7SLuis R. Rodriguez * We need to ensure the extension channels exist to 1068038659e7SLuis R. Rodriguez * be able to use HT40- or HT40+, this finds them (or not) 1069038659e7SLuis R. Rodriguez */ 1070038659e7SLuis R. Rodriguez for (i = 0; i < sband->n_channels; i++) { 1071038659e7SLuis R. Rodriguez struct ieee80211_channel *c = &sband->channels[i]; 1072038659e7SLuis R. Rodriguez if (c->center_freq == (channel->center_freq - 20)) 1073038659e7SLuis R. Rodriguez channel_before = c; 1074038659e7SLuis R. Rodriguez if (c->center_freq == (channel->center_freq + 20)) 1075038659e7SLuis R. Rodriguez channel_after = c; 1076038659e7SLuis R. Rodriguez } 1077038659e7SLuis R. Rodriguez 1078038659e7SLuis R. Rodriguez /* 1079038659e7SLuis R. Rodriguez * Please note that this assumes target bandwidth is 20 MHz, 1080038659e7SLuis R. Rodriguez * if that ever changes we also need to change the below logic 1081038659e7SLuis R. Rodriguez * to include that as well. 1082038659e7SLuis R. Rodriguez */ 1083038659e7SLuis R. Rodriguez if (is_ht40_not_allowed(channel_before)) 1084689da1b3SLuis R. Rodriguez channel->flags |= IEEE80211_CHAN_NO_HT40MINUS; 1085038659e7SLuis R. Rodriguez else 1086689da1b3SLuis R. Rodriguez channel->flags &= ~IEEE80211_CHAN_NO_HT40MINUS; 1087038659e7SLuis R. Rodriguez 1088038659e7SLuis R. Rodriguez if (is_ht40_not_allowed(channel_after)) 1089689da1b3SLuis R. Rodriguez channel->flags |= IEEE80211_CHAN_NO_HT40PLUS; 1090038659e7SLuis R. Rodriguez else 1091689da1b3SLuis R. Rodriguez channel->flags &= ~IEEE80211_CHAN_NO_HT40PLUS; 1092038659e7SLuis R. Rodriguez } 1093038659e7SLuis R. Rodriguez 1094038659e7SLuis R. Rodriguez static void reg_process_ht_flags_band(struct wiphy *wiphy, 1095038659e7SLuis R. Rodriguez enum ieee80211_band band) 1096038659e7SLuis R. Rodriguez { 1097038659e7SLuis R. Rodriguez unsigned int i; 1098038659e7SLuis R. Rodriguez struct ieee80211_supported_band *sband; 1099038659e7SLuis R. Rodriguez 1100038659e7SLuis R. Rodriguez BUG_ON(!wiphy->bands[band]); 1101038659e7SLuis R. Rodriguez sband = wiphy->bands[band]; 1102038659e7SLuis R. Rodriguez 1103038659e7SLuis R. Rodriguez for (i = 0; i < sband->n_channels; i++) 1104038659e7SLuis R. Rodriguez reg_process_ht_flags_channel(wiphy, band, i); 1105038659e7SLuis R. Rodriguez } 1106038659e7SLuis R. Rodriguez 1107038659e7SLuis R. Rodriguez static void reg_process_ht_flags(struct wiphy *wiphy) 1108038659e7SLuis R. Rodriguez { 1109038659e7SLuis R. Rodriguez enum ieee80211_band band; 1110038659e7SLuis R. Rodriguez 1111038659e7SLuis R. Rodriguez if (!wiphy) 1112038659e7SLuis R. Rodriguez return; 1113038659e7SLuis R. Rodriguez 1114038659e7SLuis R. Rodriguez for (band = 0; band < IEEE80211_NUM_BANDS; band++) { 1115038659e7SLuis R. Rodriguez if (wiphy->bands[band]) 1116038659e7SLuis R. Rodriguez reg_process_ht_flags_band(wiphy, band); 1117038659e7SLuis R. Rodriguez } 1118038659e7SLuis R. Rodriguez 1119038659e7SLuis R. Rodriguez } 1120038659e7SLuis R. Rodriguez 11217db90f4aSLuis R. Rodriguez void wiphy_update_regulatory(struct wiphy *wiphy, 11227db90f4aSLuis R. Rodriguez enum nl80211_reg_initiator initiator) 11238318d78aSJohannes Berg { 11248318d78aSJohannes Berg enum ieee80211_band band; 1125d46e5b1dSLuis R. Rodriguez 11267db90f4aSLuis R. Rodriguez if (ignore_reg_update(wiphy, initiator)) 1127e38f8a7aSLuis R. Rodriguez goto out; 1128b2e1b302SLuis R. Rodriguez for (band = 0; band < IEEE80211_NUM_BANDS; band++) { 11298318d78aSJohannes Berg if (wiphy->bands[band]) 11307ca43d03SLuis R. Rodriguez handle_band(wiphy, band, initiator); 1131b2e1b302SLuis R. Rodriguez } 1132e38f8a7aSLuis R. Rodriguez out: 1133e38f8a7aSLuis R. Rodriguez reg_process_beacons(wiphy); 1134038659e7SLuis R. Rodriguez reg_process_ht_flags(wiphy); 1135b2e1b302SLuis R. Rodriguez if (wiphy->reg_notifier) 1136716f9392SLuis R. Rodriguez wiphy->reg_notifier(wiphy, last_request); 1137b2e1b302SLuis R. Rodriguez } 1138b2e1b302SLuis R. Rodriguez 11391fa25e41SLuis R. Rodriguez static void handle_channel_custom(struct wiphy *wiphy, 11401fa25e41SLuis R. Rodriguez enum ieee80211_band band, 11411fa25e41SLuis R. Rodriguez unsigned int chan_idx, 11421fa25e41SLuis R. Rodriguez const struct ieee80211_regdomain *regd) 11431fa25e41SLuis R. Rodriguez { 11441fa25e41SLuis R. Rodriguez int r; 1145038659e7SLuis R. Rodriguez u32 desired_bw_khz = MHZ_TO_KHZ(20); 1146038659e7SLuis R. Rodriguez u32 bw_flags = 0; 11471fa25e41SLuis R. Rodriguez const struct ieee80211_reg_rule *reg_rule = NULL; 11481fa25e41SLuis R. Rodriguez const struct ieee80211_power_rule *power_rule = NULL; 1149038659e7SLuis R. Rodriguez const struct ieee80211_freq_range *freq_range = NULL; 11501fa25e41SLuis R. Rodriguez struct ieee80211_supported_band *sband; 11511fa25e41SLuis R. Rodriguez struct ieee80211_channel *chan; 11521fa25e41SLuis R. Rodriguez 1153abc7381bSLuis R. Rodriguez assert_reg_lock(); 1154ac46d48eSLuis R. Rodriguez 11551fa25e41SLuis R. Rodriguez sband = wiphy->bands[band]; 11561fa25e41SLuis R. Rodriguez BUG_ON(chan_idx >= sband->n_channels); 11571fa25e41SLuis R. Rodriguez chan = &sband->channels[chan_idx]; 11581fa25e41SLuis R. Rodriguez 1159038659e7SLuis R. Rodriguez r = freq_reg_info_regd(wiphy, 1160038659e7SLuis R. Rodriguez MHZ_TO_KHZ(chan->center_freq), 1161038659e7SLuis R. Rodriguez desired_bw_khz, 1162038659e7SLuis R. Rodriguez ®_rule, 1163038659e7SLuis R. Rodriguez regd); 11641fa25e41SLuis R. Rodriguez 11651fa25e41SLuis R. Rodriguez if (r) { 1166d91e41b6SLuis R. Rodriguez REG_DBG_PRINT("Disabling freq %d MHz as custom " 1167a6518536SLuis R. Rodriguez "regd has no rule that fits a %d MHz " 1168a6518536SLuis R. Rodriguez "wide channel\n", 1169a6518536SLuis R. Rodriguez chan->center_freq, 1170a6518536SLuis R. Rodriguez KHZ_TO_MHZ(desired_bw_khz)); 11711fa25e41SLuis R. Rodriguez chan->flags = IEEE80211_CHAN_DISABLED; 11721fa25e41SLuis R. Rodriguez return; 11731fa25e41SLuis R. Rodriguez } 11741fa25e41SLuis R. Rodriguez 1175e702d3cfSLuis R. Rodriguez chan_reg_rule_print_dbg(chan, desired_bw_khz, reg_rule); 1176e702d3cfSLuis R. Rodriguez 11771fa25e41SLuis R. Rodriguez power_rule = ®_rule->power_rule; 1178038659e7SLuis R. Rodriguez freq_range = ®_rule->freq_range; 11791fa25e41SLuis R. Rodriguez 1180038659e7SLuis R. Rodriguez if (freq_range->max_bandwidth_khz < MHZ_TO_KHZ(40)) 1181038659e7SLuis R. Rodriguez bw_flags = IEEE80211_CHAN_NO_HT40; 1182038659e7SLuis R. Rodriguez 1183038659e7SLuis R. Rodriguez chan->flags |= map_regdom_flags(reg_rule->flags) | bw_flags; 11841fa25e41SLuis R. Rodriguez chan->max_antenna_gain = (int) MBI_TO_DBI(power_rule->max_antenna_gain); 11851fa25e41SLuis R. Rodriguez chan->max_power = (int) MBM_TO_DBM(power_rule->max_eirp); 11861fa25e41SLuis R. Rodriguez } 11871fa25e41SLuis R. Rodriguez 11881fa25e41SLuis R. Rodriguez static void handle_band_custom(struct wiphy *wiphy, enum ieee80211_band band, 11891fa25e41SLuis R. Rodriguez const struct ieee80211_regdomain *regd) 11901fa25e41SLuis R. Rodriguez { 11911fa25e41SLuis R. Rodriguez unsigned int i; 11921fa25e41SLuis R. Rodriguez struct ieee80211_supported_band *sband; 11931fa25e41SLuis R. Rodriguez 11941fa25e41SLuis R. Rodriguez BUG_ON(!wiphy->bands[band]); 11951fa25e41SLuis R. Rodriguez sband = wiphy->bands[band]; 11961fa25e41SLuis R. Rodriguez 11971fa25e41SLuis R. Rodriguez for (i = 0; i < sband->n_channels; i++) 11981fa25e41SLuis R. Rodriguez handle_channel_custom(wiphy, band, i, regd); 11991fa25e41SLuis R. Rodriguez } 12001fa25e41SLuis R. Rodriguez 12011fa25e41SLuis R. Rodriguez /* Used by drivers prior to wiphy registration */ 12021fa25e41SLuis R. Rodriguez void wiphy_apply_custom_regulatory(struct wiphy *wiphy, 12031fa25e41SLuis R. Rodriguez const struct ieee80211_regdomain *regd) 12041fa25e41SLuis R. Rodriguez { 12051fa25e41SLuis R. Rodriguez enum ieee80211_band band; 1206bbcf3f02SLuis R. Rodriguez unsigned int bands_set = 0; 1207ac46d48eSLuis R. Rodriguez 1208abc7381bSLuis R. Rodriguez mutex_lock(®_mutex); 12091fa25e41SLuis R. Rodriguez for (band = 0; band < IEEE80211_NUM_BANDS; band++) { 1210bbcf3f02SLuis R. Rodriguez if (!wiphy->bands[band]) 1211bbcf3f02SLuis R. Rodriguez continue; 12121fa25e41SLuis R. Rodriguez handle_band_custom(wiphy, band, regd); 1213bbcf3f02SLuis R. Rodriguez bands_set++; 12141fa25e41SLuis R. Rodriguez } 1215abc7381bSLuis R. Rodriguez mutex_unlock(®_mutex); 1216bbcf3f02SLuis R. Rodriguez 1217bbcf3f02SLuis R. Rodriguez /* 1218bbcf3f02SLuis R. Rodriguez * no point in calling this if it won't have any effect 1219bbcf3f02SLuis R. Rodriguez * on your device's supportd bands. 1220bbcf3f02SLuis R. Rodriguez */ 1221bbcf3f02SLuis R. Rodriguez WARN_ON(!bands_set); 12221fa25e41SLuis R. Rodriguez } 12231fa25e41SLuis R. Rodriguez EXPORT_SYMBOL(wiphy_apply_custom_regulatory); 12241fa25e41SLuis R. Rodriguez 1225fb1fc7adSLuis R. Rodriguez /* 1226fb1fc7adSLuis R. Rodriguez * Return value which can be used by ignore_request() to indicate 1227fb1fc7adSLuis R. Rodriguez * it has been determined we should intersect two regulatory domains 1228fb1fc7adSLuis R. Rodriguez */ 12299c96477dSLuis R. Rodriguez #define REG_INTERSECT 1 12309c96477dSLuis R. Rodriguez 123184fa4f43SJohannes Berg /* This has the logic which determines when a new request 123284fa4f43SJohannes Berg * should be ignored. */ 12332f92cd2eSLuis R. Rodriguez static int ignore_request(struct wiphy *wiphy, 12342f92cd2eSLuis R. Rodriguez struct regulatory_request *pending_request) 123584fa4f43SJohannes Berg { 1236806a9e39SLuis R. Rodriguez struct wiphy *last_wiphy = NULL; 1237761cf7ecSLuis R. Rodriguez 1238761cf7ecSLuis R. Rodriguez assert_cfg80211_lock(); 1239761cf7ecSLuis R. Rodriguez 124084fa4f43SJohannes Berg /* All initial requests are respected */ 124184fa4f43SJohannes Berg if (!last_request) 124284fa4f43SJohannes Berg return 0; 124384fa4f43SJohannes Berg 12442f92cd2eSLuis R. Rodriguez switch (pending_request->initiator) { 12457db90f4aSLuis R. Rodriguez case NL80211_REGDOM_SET_BY_CORE: 124609d989d1SLuis R. Rodriguez return 0; 12477db90f4aSLuis R. Rodriguez case NL80211_REGDOM_SET_BY_COUNTRY_IE: 1248806a9e39SLuis R. Rodriguez 1249806a9e39SLuis R. Rodriguez last_wiphy = wiphy_idx_to_wiphy(last_request->wiphy_idx); 1250806a9e39SLuis R. Rodriguez 12512f92cd2eSLuis R. Rodriguez if (unlikely(!is_an_alpha2(pending_request->alpha2))) 125284fa4f43SJohannes Berg return -EINVAL; 12537db90f4aSLuis R. Rodriguez if (last_request->initiator == 12547db90f4aSLuis R. Rodriguez NL80211_REGDOM_SET_BY_COUNTRY_IE) { 1255806a9e39SLuis R. Rodriguez if (last_wiphy != wiphy) { 125684fa4f43SJohannes Berg /* 125784fa4f43SJohannes Berg * Two cards with two APs claiming different 12581fe90b03SThadeu Lima de Souza Cascardo * Country IE alpha2s. We could 125984fa4f43SJohannes Berg * intersect them, but that seems unlikely 126084fa4f43SJohannes Berg * to be correct. Reject second one for now. 126184fa4f43SJohannes Berg */ 12622f92cd2eSLuis R. Rodriguez if (regdom_changes(pending_request->alpha2)) 126384fa4f43SJohannes Berg return -EOPNOTSUPP; 126484fa4f43SJohannes Berg return -EALREADY; 126584fa4f43SJohannes Berg } 1266fb1fc7adSLuis R. Rodriguez /* 1267fb1fc7adSLuis R. Rodriguez * Two consecutive Country IE hints on the same wiphy. 1268fb1fc7adSLuis R. Rodriguez * This should be picked up early by the driver/stack 1269fb1fc7adSLuis R. Rodriguez */ 12702f92cd2eSLuis R. Rodriguez if (WARN_ON(regdom_changes(pending_request->alpha2))) 127184fa4f43SJohannes Berg return 0; 127284fa4f43SJohannes Berg return -EALREADY; 127384fa4f43SJohannes Berg } 1274a171fba4SLuis R. Rodriguez return 0; 12757db90f4aSLuis R. Rodriguez case NL80211_REGDOM_SET_BY_DRIVER: 12767db90f4aSLuis R. Rodriguez if (last_request->initiator == NL80211_REGDOM_SET_BY_CORE) { 12772f92cd2eSLuis R. Rodriguez if (regdom_changes(pending_request->alpha2)) 1278e74b1e7fSLuis R. Rodriguez return 0; 1279e74b1e7fSLuis R. Rodriguez return -EALREADY; 1280e74b1e7fSLuis R. Rodriguez } 1281fff32c04SLuis R. Rodriguez 1282fff32c04SLuis R. Rodriguez /* 1283fff32c04SLuis R. Rodriguez * This would happen if you unplug and plug your card 1284fff32c04SLuis R. Rodriguez * back in or if you add a new device for which the previously 1285fff32c04SLuis R. Rodriguez * loaded card also agrees on the regulatory domain. 1286fff32c04SLuis R. Rodriguez */ 12877db90f4aSLuis R. Rodriguez if (last_request->initiator == NL80211_REGDOM_SET_BY_DRIVER && 12882f92cd2eSLuis R. Rodriguez !regdom_changes(pending_request->alpha2)) 1289fff32c04SLuis R. Rodriguez return -EALREADY; 1290fff32c04SLuis R. Rodriguez 12913e0c3ff3SLuis R. Rodriguez return REG_INTERSECT; 12927db90f4aSLuis R. Rodriguez case NL80211_REGDOM_SET_BY_USER: 12937db90f4aSLuis R. Rodriguez if (last_request->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) 12949c96477dSLuis R. Rodriguez return REG_INTERSECT; 1295fb1fc7adSLuis R. Rodriguez /* 1296fb1fc7adSLuis R. Rodriguez * If the user knows better the user should set the regdom 1297fb1fc7adSLuis R. Rodriguez * to their country before the IE is picked up 1298fb1fc7adSLuis R. Rodriguez */ 12997db90f4aSLuis R. Rodriguez if (last_request->initiator == NL80211_REGDOM_SET_BY_USER && 13003f2355cbSLuis R. Rodriguez last_request->intersect) 13013f2355cbSLuis R. Rodriguez return -EOPNOTSUPP; 1302fb1fc7adSLuis R. Rodriguez /* 1303fb1fc7adSLuis R. Rodriguez * Process user requests only after previous user/driver/core 1304fb1fc7adSLuis R. Rodriguez * requests have been processed 1305fb1fc7adSLuis R. Rodriguez */ 13067db90f4aSLuis R. Rodriguez if (last_request->initiator == NL80211_REGDOM_SET_BY_CORE || 13077db90f4aSLuis R. Rodriguez last_request->initiator == NL80211_REGDOM_SET_BY_DRIVER || 13087db90f4aSLuis R. Rodriguez last_request->initiator == NL80211_REGDOM_SET_BY_USER) { 130969b1572bSLuis R. Rodriguez if (regdom_changes(last_request->alpha2)) 13105eebade6SLuis R. Rodriguez return -EAGAIN; 13115eebade6SLuis R. Rodriguez } 13125eebade6SLuis R. Rodriguez 1313baeb66feSJohn W. Linville if (!regdom_changes(pending_request->alpha2)) 1314e74b1e7fSLuis R. Rodriguez return -EALREADY; 1315e74b1e7fSLuis R. Rodriguez 131684fa4f43SJohannes Berg return 0; 131784fa4f43SJohannes Berg } 131884fa4f43SJohannes Berg 131984fa4f43SJohannes Berg return -EINVAL; 132084fa4f43SJohannes Berg } 132184fa4f43SJohannes Berg 1322b2e253cfSLuis R. Rodriguez static void reg_set_request_processed(void) 1323b2e253cfSLuis R. Rodriguez { 1324b2e253cfSLuis R. Rodriguez bool need_more_processing = false; 1325b2e253cfSLuis R. Rodriguez 1326b2e253cfSLuis R. Rodriguez last_request->processed = true; 1327b2e253cfSLuis R. Rodriguez 1328b2e253cfSLuis R. Rodriguez spin_lock(®_requests_lock); 1329b2e253cfSLuis R. Rodriguez if (!list_empty(®_requests_list)) 1330b2e253cfSLuis R. Rodriguez need_more_processing = true; 1331b2e253cfSLuis R. Rodriguez spin_unlock(®_requests_lock); 1332b2e253cfSLuis R. Rodriguez 1333b2e253cfSLuis R. Rodriguez if (need_more_processing) 1334b2e253cfSLuis R. Rodriguez schedule_work(®_work); 1335b2e253cfSLuis R. Rodriguez } 1336b2e253cfSLuis R. Rodriguez 1337d1c96a9aSLuis R. Rodriguez /** 1338d1c96a9aSLuis R. Rodriguez * __regulatory_hint - hint to the wireless core a regulatory domain 1339d1c96a9aSLuis R. Rodriguez * @wiphy: if the hint comes from country information from an AP, this 1340d1c96a9aSLuis R. Rodriguez * is required to be set to the wiphy that received the information 134128da32d7SLuis R. Rodriguez * @pending_request: the regulatory request currently being processed 1342d1c96a9aSLuis R. Rodriguez * 1343d1c96a9aSLuis R. Rodriguez * The Wireless subsystem can use this function to hint to the wireless core 134428da32d7SLuis R. Rodriguez * what it believes should be the current regulatory domain. 1345d1c96a9aSLuis R. Rodriguez * 1346d1c96a9aSLuis R. Rodriguez * Returns zero if all went fine, %-EALREADY if a regulatory domain had 1347d1c96a9aSLuis R. Rodriguez * already been set or other standard error codes. 1348d1c96a9aSLuis R. Rodriguez * 1349abc7381bSLuis R. Rodriguez * Caller must hold &cfg80211_mutex and ®_mutex 1350d1c96a9aSLuis R. Rodriguez */ 135128da32d7SLuis R. Rodriguez static int __regulatory_hint(struct wiphy *wiphy, 135228da32d7SLuis R. Rodriguez struct regulatory_request *pending_request) 1353b2e1b302SLuis R. Rodriguez { 13549c96477dSLuis R. Rodriguez bool intersect = false; 1355b2e1b302SLuis R. Rodriguez int r = 0; 1356b2e1b302SLuis R. Rodriguez 1357761cf7ecSLuis R. Rodriguez assert_cfg80211_lock(); 1358761cf7ecSLuis R. Rodriguez 13592f92cd2eSLuis R. Rodriguez r = ignore_request(wiphy, pending_request); 13609c96477dSLuis R. Rodriguez 13613e0c3ff3SLuis R. Rodriguez if (r == REG_INTERSECT) { 13627db90f4aSLuis R. Rodriguez if (pending_request->initiator == 13637db90f4aSLuis R. Rodriguez NL80211_REGDOM_SET_BY_DRIVER) { 13643e0c3ff3SLuis R. Rodriguez r = reg_copy_regd(&wiphy->regd, cfg80211_regdomain); 1365d951c1ddSLuis R. Rodriguez if (r) { 1366d951c1ddSLuis R. Rodriguez kfree(pending_request); 1367b2e1b302SLuis R. Rodriguez return r; 13683e0c3ff3SLuis R. Rodriguez } 1369d951c1ddSLuis R. Rodriguez } 13703e0c3ff3SLuis R. Rodriguez intersect = true; 13713e0c3ff3SLuis R. Rodriguez } else if (r) { 1372fb1fc7adSLuis R. Rodriguez /* 1373fb1fc7adSLuis R. Rodriguez * If the regulatory domain being requested by the 13743e0c3ff3SLuis R. Rodriguez * driver has already been set just copy it to the 1375fb1fc7adSLuis R. Rodriguez * wiphy 1376fb1fc7adSLuis R. Rodriguez */ 137728da32d7SLuis R. Rodriguez if (r == -EALREADY && 13787db90f4aSLuis R. Rodriguez pending_request->initiator == 13797db90f4aSLuis R. Rodriguez NL80211_REGDOM_SET_BY_DRIVER) { 13803e0c3ff3SLuis R. Rodriguez r = reg_copy_regd(&wiphy->regd, cfg80211_regdomain); 1381d951c1ddSLuis R. Rodriguez if (r) { 1382d951c1ddSLuis R. Rodriguez kfree(pending_request); 13833e0c3ff3SLuis R. Rodriguez return r; 1384d951c1ddSLuis R. Rodriguez } 13853e0c3ff3SLuis R. Rodriguez r = -EALREADY; 13863e0c3ff3SLuis R. Rodriguez goto new_request; 13873e0c3ff3SLuis R. Rodriguez } 1388d951c1ddSLuis R. Rodriguez kfree(pending_request); 13893e0c3ff3SLuis R. Rodriguez return r; 13903e0c3ff3SLuis R. Rodriguez } 1391b2e1b302SLuis R. Rodriguez 13923e0c3ff3SLuis R. Rodriguez new_request: 1393f6037d09SJohannes Berg kfree(last_request); 1394d951c1ddSLuis R. Rodriguez 1395d951c1ddSLuis R. Rodriguez last_request = pending_request; 1396d951c1ddSLuis R. Rodriguez last_request->intersect = intersect; 1397d951c1ddSLuis R. Rodriguez 1398d951c1ddSLuis R. Rodriguez pending_request = NULL; 13993e0c3ff3SLuis R. Rodriguez 140009d989d1SLuis R. Rodriguez if (last_request->initiator == NL80211_REGDOM_SET_BY_USER) { 140109d989d1SLuis R. Rodriguez user_alpha2[0] = last_request->alpha2[0]; 140209d989d1SLuis R. Rodriguez user_alpha2[1] = last_request->alpha2[1]; 140309d989d1SLuis R. Rodriguez } 140409d989d1SLuis R. Rodriguez 14053e0c3ff3SLuis R. Rodriguez /* When r == REG_INTERSECT we do need to call CRDA */ 140673d54c9eSLuis R. Rodriguez if (r < 0) { 140773d54c9eSLuis R. Rodriguez /* 140873d54c9eSLuis R. Rodriguez * Since CRDA will not be called in this case as we already 140973d54c9eSLuis R. Rodriguez * have applied the requested regulatory domain before we just 141073d54c9eSLuis R. Rodriguez * inform userspace we have processed the request 141173d54c9eSLuis R. Rodriguez */ 1412b2e253cfSLuis R. Rodriguez if (r == -EALREADY) { 141373d54c9eSLuis R. Rodriguez nl80211_send_reg_change_event(last_request); 1414b2e253cfSLuis R. Rodriguez reg_set_request_processed(); 1415b2e253cfSLuis R. Rodriguez } 14163e0c3ff3SLuis R. Rodriguez return r; 141773d54c9eSLuis R. Rodriguez } 14183e0c3ff3SLuis R. Rodriguez 1419d951c1ddSLuis R. Rodriguez return call_crda(last_request->alpha2); 1420b2e1b302SLuis R. Rodriguez } 1421b2e1b302SLuis R. Rodriguez 142230a548c7SLuis R. Rodriguez /* This processes *all* regulatory hints */ 1423d951c1ddSLuis R. Rodriguez static void reg_process_hint(struct regulatory_request *reg_request) 1424fe33eb39SLuis R. Rodriguez { 1425fe33eb39SLuis R. Rodriguez int r = 0; 1426fe33eb39SLuis R. Rodriguez struct wiphy *wiphy = NULL; 1427c4c32294SYuri Ershov enum nl80211_reg_initiator initiator = reg_request->initiator; 1428fe33eb39SLuis R. Rodriguez 1429fe33eb39SLuis R. Rodriguez BUG_ON(!reg_request->alpha2); 1430fe33eb39SLuis R. Rodriguez 1431fe33eb39SLuis R. Rodriguez if (wiphy_idx_valid(reg_request->wiphy_idx)) 1432fe33eb39SLuis R. Rodriguez wiphy = wiphy_idx_to_wiphy(reg_request->wiphy_idx); 1433fe33eb39SLuis R. Rodriguez 14347db90f4aSLuis R. Rodriguez if (reg_request->initiator == NL80211_REGDOM_SET_BY_DRIVER && 1435fe33eb39SLuis R. Rodriguez !wiphy) { 1436d951c1ddSLuis R. Rodriguez kfree(reg_request); 1437b0e2880bSLuis R. Rodriguez return; 1438fe33eb39SLuis R. Rodriguez } 1439fe33eb39SLuis R. Rodriguez 144028da32d7SLuis R. Rodriguez r = __regulatory_hint(wiphy, reg_request); 1441fe33eb39SLuis R. Rodriguez /* This is required so that the orig_* parameters are saved */ 14425be83de5SJohannes Berg if (r == -EALREADY && wiphy && 14435be83de5SJohannes Berg wiphy->flags & WIPHY_FLAG_STRICT_REGULATORY) 1444c4c32294SYuri Ershov wiphy_update_regulatory(wiphy, initiator); 1445fe33eb39SLuis R. Rodriguez } 1446fe33eb39SLuis R. Rodriguez 1447b2e253cfSLuis R. Rodriguez /* 1448b2e253cfSLuis R. Rodriguez * Processes regulatory hints, this is all the NL80211_REGDOM_SET_BY_* 1449b2e253cfSLuis R. Rodriguez * Regulatory hints come on a first come first serve basis and we 1450b2e253cfSLuis R. Rodriguez * must process each one atomically. 1451b2e253cfSLuis R. Rodriguez */ 1452fe33eb39SLuis R. Rodriguez static void reg_process_pending_hints(void) 1453fe33eb39SLuis R. Rodriguez { 1454fe33eb39SLuis R. Rodriguez struct regulatory_request *reg_request; 1455fe33eb39SLuis R. Rodriguez 1456b0e2880bSLuis R. Rodriguez mutex_lock(&cfg80211_mutex); 1457b0e2880bSLuis R. Rodriguez mutex_lock(®_mutex); 1458b0e2880bSLuis R. Rodriguez 1459b2e253cfSLuis R. Rodriguez /* When last_request->processed becomes true this will be rescheduled */ 1460b2e253cfSLuis R. Rodriguez if (last_request && !last_request->processed) { 1461b2e253cfSLuis R. Rodriguez REG_DBG_PRINT("Pending regulatory request, waiting " 1462b2e253cfSLuis R. Rodriguez "for it to be processed..."); 1463b2e253cfSLuis R. Rodriguez goto out; 1464b2e253cfSLuis R. Rodriguez } 1465b2e253cfSLuis R. Rodriguez 1466fe33eb39SLuis R. Rodriguez spin_lock(®_requests_lock); 1467b2e253cfSLuis R. Rodriguez 1468b2e253cfSLuis R. Rodriguez if (list_empty(®_requests_list)) { 1469b2e253cfSLuis R. Rodriguez spin_unlock(®_requests_lock); 1470b2e253cfSLuis R. Rodriguez goto out; 1471b2e253cfSLuis R. Rodriguez } 1472b2e253cfSLuis R. Rodriguez 1473fe33eb39SLuis R. Rodriguez reg_request = list_first_entry(®_requests_list, 1474fe33eb39SLuis R. Rodriguez struct regulatory_request, 1475fe33eb39SLuis R. Rodriguez list); 1476fe33eb39SLuis R. Rodriguez list_del_init(®_request->list); 1477fe33eb39SLuis R. Rodriguez 1478d951c1ddSLuis R. Rodriguez spin_unlock(®_requests_lock); 1479b0e2880bSLuis R. Rodriguez 1480b2e253cfSLuis R. Rodriguez reg_process_hint(reg_request); 1481b2e253cfSLuis R. Rodriguez 1482b2e253cfSLuis R. Rodriguez out: 1483b0e2880bSLuis R. Rodriguez mutex_unlock(®_mutex); 1484b0e2880bSLuis R. Rodriguez mutex_unlock(&cfg80211_mutex); 1485fe33eb39SLuis R. Rodriguez } 1486fe33eb39SLuis R. Rodriguez 1487e38f8a7aSLuis R. Rodriguez /* Processes beacon hints -- this has nothing to do with country IEs */ 1488e38f8a7aSLuis R. Rodriguez static void reg_process_pending_beacon_hints(void) 1489e38f8a7aSLuis R. Rodriguez { 149079c97e97SJohannes Berg struct cfg80211_registered_device *rdev; 1491e38f8a7aSLuis R. Rodriguez struct reg_beacon *pending_beacon, *tmp; 1492e38f8a7aSLuis R. Rodriguez 1493abc7381bSLuis R. Rodriguez /* 1494abc7381bSLuis R. Rodriguez * No need to hold the reg_mutex here as we just touch wiphys 1495abc7381bSLuis R. Rodriguez * and do not read or access regulatory variables. 1496abc7381bSLuis R. Rodriguez */ 1497e38f8a7aSLuis R. Rodriguez mutex_lock(&cfg80211_mutex); 1498e38f8a7aSLuis R. Rodriguez 1499e38f8a7aSLuis R. Rodriguez /* This goes through the _pending_ beacon list */ 1500e38f8a7aSLuis R. Rodriguez spin_lock_bh(®_pending_beacons_lock); 1501e38f8a7aSLuis R. Rodriguez 1502e38f8a7aSLuis R. Rodriguez if (list_empty(®_pending_beacons)) { 1503e38f8a7aSLuis R. Rodriguez spin_unlock_bh(®_pending_beacons_lock); 1504e38f8a7aSLuis R. Rodriguez goto out; 1505e38f8a7aSLuis R. Rodriguez } 1506e38f8a7aSLuis R. Rodriguez 1507e38f8a7aSLuis R. Rodriguez list_for_each_entry_safe(pending_beacon, tmp, 1508e38f8a7aSLuis R. Rodriguez ®_pending_beacons, list) { 1509e38f8a7aSLuis R. Rodriguez 1510e38f8a7aSLuis R. Rodriguez list_del_init(&pending_beacon->list); 1511e38f8a7aSLuis R. Rodriguez 1512e38f8a7aSLuis R. Rodriguez /* Applies the beacon hint to current wiphys */ 151379c97e97SJohannes Berg list_for_each_entry(rdev, &cfg80211_rdev_list, list) 151479c97e97SJohannes Berg wiphy_update_new_beacon(&rdev->wiphy, pending_beacon); 1515e38f8a7aSLuis R. Rodriguez 1516e38f8a7aSLuis R. Rodriguez /* Remembers the beacon hint for new wiphys or reg changes */ 1517e38f8a7aSLuis R. Rodriguez list_add_tail(&pending_beacon->list, ®_beacon_list); 1518e38f8a7aSLuis R. Rodriguez } 1519e38f8a7aSLuis R. Rodriguez 1520e38f8a7aSLuis R. Rodriguez spin_unlock_bh(®_pending_beacons_lock); 1521e38f8a7aSLuis R. Rodriguez out: 1522e38f8a7aSLuis R. Rodriguez mutex_unlock(&cfg80211_mutex); 1523e38f8a7aSLuis R. Rodriguez } 1524e38f8a7aSLuis R. Rodriguez 1525fe33eb39SLuis R. Rodriguez static void reg_todo(struct work_struct *work) 1526fe33eb39SLuis R. Rodriguez { 1527fe33eb39SLuis R. Rodriguez reg_process_pending_hints(); 1528e38f8a7aSLuis R. Rodriguez reg_process_pending_beacon_hints(); 1529fe33eb39SLuis R. Rodriguez } 1530fe33eb39SLuis R. Rodriguez 1531fe33eb39SLuis R. Rodriguez static void queue_regulatory_request(struct regulatory_request *request) 1532fe33eb39SLuis R. Rodriguez { 1533c61029c7SJohn W. Linville if (isalpha(request->alpha2[0])) 1534c61029c7SJohn W. Linville request->alpha2[0] = toupper(request->alpha2[0]); 1535c61029c7SJohn W. Linville if (isalpha(request->alpha2[1])) 1536c61029c7SJohn W. Linville request->alpha2[1] = toupper(request->alpha2[1]); 1537c61029c7SJohn W. Linville 1538fe33eb39SLuis R. Rodriguez spin_lock(®_requests_lock); 1539fe33eb39SLuis R. Rodriguez list_add_tail(&request->list, ®_requests_list); 1540fe33eb39SLuis R. Rodriguez spin_unlock(®_requests_lock); 1541fe33eb39SLuis R. Rodriguez 1542fe33eb39SLuis R. Rodriguez schedule_work(®_work); 1543fe33eb39SLuis R. Rodriguez } 1544fe33eb39SLuis R. Rodriguez 154509d989d1SLuis R. Rodriguez /* 154609d989d1SLuis R. Rodriguez * Core regulatory hint -- happens during cfg80211_init() 154709d989d1SLuis R. Rodriguez * and when we restore regulatory settings. 154809d989d1SLuis R. Rodriguez */ 1549ba25c141SLuis R. Rodriguez static int regulatory_hint_core(const char *alpha2) 1550ba25c141SLuis R. Rodriguez { 1551ba25c141SLuis R. Rodriguez struct regulatory_request *request; 1552ba25c141SLuis R. Rodriguez 155309d989d1SLuis R. Rodriguez kfree(last_request); 155409d989d1SLuis R. Rodriguez last_request = NULL; 1555ba25c141SLuis R. Rodriguez 1556ba25c141SLuis R. Rodriguez request = kzalloc(sizeof(struct regulatory_request), 1557ba25c141SLuis R. Rodriguez GFP_KERNEL); 1558ba25c141SLuis R. Rodriguez if (!request) 1559ba25c141SLuis R. Rodriguez return -ENOMEM; 1560ba25c141SLuis R. Rodriguez 1561ba25c141SLuis R. Rodriguez request->alpha2[0] = alpha2[0]; 1562ba25c141SLuis R. Rodriguez request->alpha2[1] = alpha2[1]; 15637db90f4aSLuis R. Rodriguez request->initiator = NL80211_REGDOM_SET_BY_CORE; 1564ba25c141SLuis R. Rodriguez 156531e99729SLuis R. Rodriguez queue_regulatory_request(request); 15665078b2e3SLuis R. Rodriguez 1567fe33eb39SLuis R. Rodriguez return 0; 1568ba25c141SLuis R. Rodriguez } 1569ba25c141SLuis R. Rodriguez 1570fe33eb39SLuis R. Rodriguez /* User hints */ 1571fe33eb39SLuis R. Rodriguez int regulatory_hint_user(const char *alpha2) 1572b2e1b302SLuis R. Rodriguez { 1573fe33eb39SLuis R. Rodriguez struct regulatory_request *request; 1574fe33eb39SLuis R. Rodriguez 1575be3d4810SJohannes Berg BUG_ON(!alpha2); 1576b2e1b302SLuis R. Rodriguez 1577fe33eb39SLuis R. Rodriguez request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); 1578fe33eb39SLuis R. Rodriguez if (!request) 1579fe33eb39SLuis R. Rodriguez return -ENOMEM; 1580fe33eb39SLuis R. Rodriguez 1581fe33eb39SLuis R. Rodriguez request->wiphy_idx = WIPHY_IDX_STALE; 1582fe33eb39SLuis R. Rodriguez request->alpha2[0] = alpha2[0]; 1583fe33eb39SLuis R. Rodriguez request->alpha2[1] = alpha2[1]; 1584e12822e1SLuis R. Rodriguez request->initiator = NL80211_REGDOM_SET_BY_USER; 1585fe33eb39SLuis R. Rodriguez 1586fe33eb39SLuis R. Rodriguez queue_regulatory_request(request); 1587fe33eb39SLuis R. Rodriguez 1588fe33eb39SLuis R. Rodriguez return 0; 1589fe33eb39SLuis R. Rodriguez } 1590fe33eb39SLuis R. Rodriguez 1591fe33eb39SLuis R. Rodriguez /* Driver hints */ 1592fe33eb39SLuis R. Rodriguez int regulatory_hint(struct wiphy *wiphy, const char *alpha2) 1593fe33eb39SLuis R. Rodriguez { 1594fe33eb39SLuis R. Rodriguez struct regulatory_request *request; 1595fe33eb39SLuis R. Rodriguez 1596fe33eb39SLuis R. Rodriguez BUG_ON(!alpha2); 1597fe33eb39SLuis R. Rodriguez BUG_ON(!wiphy); 1598fe33eb39SLuis R. Rodriguez 1599fe33eb39SLuis R. Rodriguez request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); 1600fe33eb39SLuis R. Rodriguez if (!request) 1601fe33eb39SLuis R. Rodriguez return -ENOMEM; 1602fe33eb39SLuis R. Rodriguez 1603fe33eb39SLuis R. Rodriguez request->wiphy_idx = get_wiphy_idx(wiphy); 1604fe33eb39SLuis R. Rodriguez 1605fe33eb39SLuis R. Rodriguez /* Must have registered wiphy first */ 1606fe33eb39SLuis R. Rodriguez BUG_ON(!wiphy_idx_valid(request->wiphy_idx)); 1607fe33eb39SLuis R. Rodriguez 1608fe33eb39SLuis R. Rodriguez request->alpha2[0] = alpha2[0]; 1609fe33eb39SLuis R. Rodriguez request->alpha2[1] = alpha2[1]; 16107db90f4aSLuis R. Rodriguez request->initiator = NL80211_REGDOM_SET_BY_DRIVER; 1611fe33eb39SLuis R. Rodriguez 1612fe33eb39SLuis R. Rodriguez queue_regulatory_request(request); 1613fe33eb39SLuis R. Rodriguez 1614fe33eb39SLuis R. Rodriguez return 0; 1615b2e1b302SLuis R. Rodriguez } 1616b2e1b302SLuis R. Rodriguez EXPORT_SYMBOL(regulatory_hint); 1617b2e1b302SLuis R. Rodriguez 16184b44c8bcSLuis R. Rodriguez /* 16194b44c8bcSLuis R. Rodriguez * We hold wdev_lock() here so we cannot hold cfg80211_mutex() and 16204b44c8bcSLuis R. Rodriguez * therefore cannot iterate over the rdev list here. 16214b44c8bcSLuis R. Rodriguez */ 16223f2355cbSLuis R. Rodriguez void regulatory_hint_11d(struct wiphy *wiphy, 162384920e3eSLuis R. Rodriguez enum ieee80211_band band, 16243f2355cbSLuis R. Rodriguez u8 *country_ie, 16253f2355cbSLuis R. Rodriguez u8 country_ie_len) 16263f2355cbSLuis R. Rodriguez { 16273f2355cbSLuis R. Rodriguez char alpha2[2]; 16283f2355cbSLuis R. Rodriguez enum environment_cap env = ENVIRON_ANY; 1629fe33eb39SLuis R. Rodriguez struct regulatory_request *request; 16303f2355cbSLuis R. Rodriguez 1631abc7381bSLuis R. Rodriguez mutex_lock(®_mutex); 16323f2355cbSLuis R. Rodriguez 16339828b017SLuis R. Rodriguez if (unlikely(!last_request)) 16349828b017SLuis R. Rodriguez goto out; 1635d335fe63SLuis R. Rodriguez 16363f2355cbSLuis R. Rodriguez /* IE len must be evenly divisible by 2 */ 16373f2355cbSLuis R. Rodriguez if (country_ie_len & 0x01) 16383f2355cbSLuis R. Rodriguez goto out; 16393f2355cbSLuis R. Rodriguez 16403f2355cbSLuis R. Rodriguez if (country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN) 16413f2355cbSLuis R. Rodriguez goto out; 16423f2355cbSLuis R. Rodriguez 16433f2355cbSLuis R. Rodriguez alpha2[0] = country_ie[0]; 16443f2355cbSLuis R. Rodriguez alpha2[1] = country_ie[1]; 16453f2355cbSLuis R. Rodriguez 16463f2355cbSLuis R. Rodriguez if (country_ie[2] == 'I') 16473f2355cbSLuis R. Rodriguez env = ENVIRON_INDOOR; 16483f2355cbSLuis R. Rodriguez else if (country_ie[2] == 'O') 16493f2355cbSLuis R. Rodriguez env = ENVIRON_OUTDOOR; 16503f2355cbSLuis R. Rodriguez 1651fb1fc7adSLuis R. Rodriguez /* 16528b19e6caSLuis R. Rodriguez * We will run this only upon a successful connection on cfg80211. 16534b44c8bcSLuis R. Rodriguez * We leave conflict resolution to the workqueue, where can hold 16544b44c8bcSLuis R. Rodriguez * cfg80211_mutex. 1655fb1fc7adSLuis R. Rodriguez */ 1656cc0b6fe8SLuis R. Rodriguez if (likely(last_request->initiator == 1657cc0b6fe8SLuis R. Rodriguez NL80211_REGDOM_SET_BY_COUNTRY_IE && 16584b44c8bcSLuis R. Rodriguez wiphy_idx_valid(last_request->wiphy_idx))) 16593f2355cbSLuis R. Rodriguez goto out; 16603f2355cbSLuis R. Rodriguez 1661fe33eb39SLuis R. Rodriguez request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); 1662fe33eb39SLuis R. Rodriguez if (!request) 1663f9f9b6e3SDan Carpenter goto out; 1664fe33eb39SLuis R. Rodriguez 1665fe33eb39SLuis R. Rodriguez request->wiphy_idx = get_wiphy_idx(wiphy); 16664f366c5dSJohn W. Linville request->alpha2[0] = alpha2[0]; 16674f366c5dSJohn W. Linville request->alpha2[1] = alpha2[1]; 16687db90f4aSLuis R. Rodriguez request->initiator = NL80211_REGDOM_SET_BY_COUNTRY_IE; 1669fe33eb39SLuis R. Rodriguez request->country_ie_env = env; 16703f2355cbSLuis R. Rodriguez 1671abc7381bSLuis R. Rodriguez mutex_unlock(®_mutex); 1672fe33eb39SLuis R. Rodriguez 1673fe33eb39SLuis R. Rodriguez queue_regulatory_request(request); 1674fe33eb39SLuis R. Rodriguez 1675fe33eb39SLuis R. Rodriguez return; 16760441d6ffSLuis R. Rodriguez 16773f2355cbSLuis R. Rodriguez out: 1678abc7381bSLuis R. Rodriguez mutex_unlock(®_mutex); 16793f2355cbSLuis R. Rodriguez } 1680b2e1b302SLuis R. Rodriguez 168109d989d1SLuis R. Rodriguez static void restore_alpha2(char *alpha2, bool reset_user) 168209d989d1SLuis R. Rodriguez { 168309d989d1SLuis R. Rodriguez /* indicates there is no alpha2 to consider for restoration */ 168409d989d1SLuis R. Rodriguez alpha2[0] = '9'; 168509d989d1SLuis R. Rodriguez alpha2[1] = '7'; 168609d989d1SLuis R. Rodriguez 168709d989d1SLuis R. Rodriguez /* The user setting has precedence over the module parameter */ 168809d989d1SLuis R. Rodriguez if (is_user_regdom_saved()) { 168909d989d1SLuis R. Rodriguez /* Unless we're asked to ignore it and reset it */ 169009d989d1SLuis R. Rodriguez if (reset_user) { 1691d91e41b6SLuis R. Rodriguez REG_DBG_PRINT("Restoring regulatory settings " 169209d989d1SLuis R. Rodriguez "including user preference\n"); 169309d989d1SLuis R. Rodriguez user_alpha2[0] = '9'; 169409d989d1SLuis R. Rodriguez user_alpha2[1] = '7'; 169509d989d1SLuis R. Rodriguez 169609d989d1SLuis R. Rodriguez /* 169709d989d1SLuis R. Rodriguez * If we're ignoring user settings, we still need to 169809d989d1SLuis R. Rodriguez * check the module parameter to ensure we put things 169909d989d1SLuis R. Rodriguez * back as they were for a full restore. 170009d989d1SLuis R. Rodriguez */ 170109d989d1SLuis R. Rodriguez if (!is_world_regdom(ieee80211_regdom)) { 1702d91e41b6SLuis R. Rodriguez REG_DBG_PRINT("Keeping preference on " 170309d989d1SLuis R. Rodriguez "module parameter ieee80211_regdom: %c%c\n", 170409d989d1SLuis R. Rodriguez ieee80211_regdom[0], 170509d989d1SLuis R. Rodriguez ieee80211_regdom[1]); 170609d989d1SLuis R. Rodriguez alpha2[0] = ieee80211_regdom[0]; 170709d989d1SLuis R. Rodriguez alpha2[1] = ieee80211_regdom[1]; 170809d989d1SLuis R. Rodriguez } 170909d989d1SLuis R. Rodriguez } else { 1710d91e41b6SLuis R. Rodriguez REG_DBG_PRINT("Restoring regulatory settings " 171109d989d1SLuis R. Rodriguez "while preserving user preference for: %c%c\n", 171209d989d1SLuis R. Rodriguez user_alpha2[0], 171309d989d1SLuis R. Rodriguez user_alpha2[1]); 171409d989d1SLuis R. Rodriguez alpha2[0] = user_alpha2[0]; 171509d989d1SLuis R. Rodriguez alpha2[1] = user_alpha2[1]; 171609d989d1SLuis R. Rodriguez } 171709d989d1SLuis R. Rodriguez } else if (!is_world_regdom(ieee80211_regdom)) { 1718d91e41b6SLuis R. Rodriguez REG_DBG_PRINT("Keeping preference on " 171909d989d1SLuis R. Rodriguez "module parameter ieee80211_regdom: %c%c\n", 172009d989d1SLuis R. Rodriguez ieee80211_regdom[0], 172109d989d1SLuis R. Rodriguez ieee80211_regdom[1]); 172209d989d1SLuis R. Rodriguez alpha2[0] = ieee80211_regdom[0]; 172309d989d1SLuis R. Rodriguez alpha2[1] = ieee80211_regdom[1]; 172409d989d1SLuis R. Rodriguez } else 1725d91e41b6SLuis R. Rodriguez REG_DBG_PRINT("Restoring regulatory settings\n"); 172609d989d1SLuis R. Rodriguez } 172709d989d1SLuis R. Rodriguez 172809d989d1SLuis R. Rodriguez /* 172909d989d1SLuis R. Rodriguez * Restoring regulatory settings involves ingoring any 173009d989d1SLuis R. Rodriguez * possibly stale country IE information and user regulatory 173109d989d1SLuis R. Rodriguez * settings if so desired, this includes any beacon hints 173209d989d1SLuis R. Rodriguez * learned as we could have traveled outside to another country 173309d989d1SLuis R. Rodriguez * after disconnection. To restore regulatory settings we do 173409d989d1SLuis R. Rodriguez * exactly what we did at bootup: 173509d989d1SLuis R. Rodriguez * 173609d989d1SLuis R. Rodriguez * - send a core regulatory hint 173709d989d1SLuis R. Rodriguez * - send a user regulatory hint if applicable 173809d989d1SLuis R. Rodriguez * 173909d989d1SLuis R. Rodriguez * Device drivers that send a regulatory hint for a specific country 174009d989d1SLuis R. Rodriguez * keep their own regulatory domain on wiphy->regd so that does does 174109d989d1SLuis R. Rodriguez * not need to be remembered. 174209d989d1SLuis R. Rodriguez */ 174309d989d1SLuis R. Rodriguez static void restore_regulatory_settings(bool reset_user) 174409d989d1SLuis R. Rodriguez { 174509d989d1SLuis R. Rodriguez char alpha2[2]; 174609d989d1SLuis R. Rodriguez struct reg_beacon *reg_beacon, *btmp; 174709d989d1SLuis R. Rodriguez 174809d989d1SLuis R. Rodriguez mutex_lock(&cfg80211_mutex); 174909d989d1SLuis R. Rodriguez mutex_lock(®_mutex); 175009d989d1SLuis R. Rodriguez 175109d989d1SLuis R. Rodriguez reset_regdomains(); 175209d989d1SLuis R. Rodriguez restore_alpha2(alpha2, reset_user); 175309d989d1SLuis R. Rodriguez 175409d989d1SLuis R. Rodriguez /* Clear beacon hints */ 175509d989d1SLuis R. Rodriguez spin_lock_bh(®_pending_beacons_lock); 175609d989d1SLuis R. Rodriguez if (!list_empty(®_pending_beacons)) { 175709d989d1SLuis R. Rodriguez list_for_each_entry_safe(reg_beacon, btmp, 175809d989d1SLuis R. Rodriguez ®_pending_beacons, list) { 175909d989d1SLuis R. Rodriguez list_del(®_beacon->list); 176009d989d1SLuis R. Rodriguez kfree(reg_beacon); 176109d989d1SLuis R. Rodriguez } 176209d989d1SLuis R. Rodriguez } 176309d989d1SLuis R. Rodriguez spin_unlock_bh(®_pending_beacons_lock); 176409d989d1SLuis R. Rodriguez 176509d989d1SLuis R. Rodriguez if (!list_empty(®_beacon_list)) { 176609d989d1SLuis R. Rodriguez list_for_each_entry_safe(reg_beacon, btmp, 176709d989d1SLuis R. Rodriguez ®_beacon_list, list) { 176809d989d1SLuis R. Rodriguez list_del(®_beacon->list); 176909d989d1SLuis R. Rodriguez kfree(reg_beacon); 177009d989d1SLuis R. Rodriguez } 177109d989d1SLuis R. Rodriguez } 177209d989d1SLuis R. Rodriguez 177309d989d1SLuis R. Rodriguez /* First restore to the basic regulatory settings */ 177409d989d1SLuis R. Rodriguez cfg80211_regdomain = cfg80211_world_regdom; 177509d989d1SLuis R. Rodriguez 177609d989d1SLuis R. Rodriguez mutex_unlock(®_mutex); 177709d989d1SLuis R. Rodriguez mutex_unlock(&cfg80211_mutex); 177809d989d1SLuis R. Rodriguez 177909d989d1SLuis R. Rodriguez regulatory_hint_core(cfg80211_regdomain->alpha2); 178009d989d1SLuis R. Rodriguez 178109d989d1SLuis R. Rodriguez /* 178209d989d1SLuis R. Rodriguez * This restores the ieee80211_regdom module parameter 178309d989d1SLuis R. Rodriguez * preference or the last user requested regulatory 178409d989d1SLuis R. Rodriguez * settings, user regulatory settings takes precedence. 178509d989d1SLuis R. Rodriguez */ 178609d989d1SLuis R. Rodriguez if (is_an_alpha2(alpha2)) 178709d989d1SLuis R. Rodriguez regulatory_hint_user(user_alpha2); 178809d989d1SLuis R. Rodriguez } 178909d989d1SLuis R. Rodriguez 179009d989d1SLuis R. Rodriguez 179109d989d1SLuis R. Rodriguez void regulatory_hint_disconnect(void) 179209d989d1SLuis R. Rodriguez { 1793d91e41b6SLuis R. Rodriguez REG_DBG_PRINT("All devices are disconnected, going to " 179409d989d1SLuis R. Rodriguez "restore regulatory settings\n"); 179509d989d1SLuis R. Rodriguez restore_regulatory_settings(false); 179609d989d1SLuis R. Rodriguez } 179709d989d1SLuis R. Rodriguez 1798e38f8a7aSLuis R. Rodriguez static bool freq_is_chan_12_13_14(u16 freq) 1799e38f8a7aSLuis R. Rodriguez { 180059eb21a6SBruno Randolf if (freq == ieee80211_channel_to_frequency(12, IEEE80211_BAND_2GHZ) || 180159eb21a6SBruno Randolf freq == ieee80211_channel_to_frequency(13, IEEE80211_BAND_2GHZ) || 180259eb21a6SBruno Randolf freq == ieee80211_channel_to_frequency(14, IEEE80211_BAND_2GHZ)) 1803e38f8a7aSLuis R. Rodriguez return true; 1804e38f8a7aSLuis R. Rodriguez return false; 1805e38f8a7aSLuis R. Rodriguez } 1806e38f8a7aSLuis R. Rodriguez 1807e38f8a7aSLuis R. Rodriguez int regulatory_hint_found_beacon(struct wiphy *wiphy, 1808e38f8a7aSLuis R. Rodriguez struct ieee80211_channel *beacon_chan, 1809e38f8a7aSLuis R. Rodriguez gfp_t gfp) 1810e38f8a7aSLuis R. Rodriguez { 1811e38f8a7aSLuis R. Rodriguez struct reg_beacon *reg_beacon; 1812e38f8a7aSLuis R. Rodriguez 1813e38f8a7aSLuis R. Rodriguez if (likely((beacon_chan->beacon_found || 1814e38f8a7aSLuis R. Rodriguez (beacon_chan->flags & IEEE80211_CHAN_RADAR) || 1815e38f8a7aSLuis R. Rodriguez (beacon_chan->band == IEEE80211_BAND_2GHZ && 1816e38f8a7aSLuis R. Rodriguez !freq_is_chan_12_13_14(beacon_chan->center_freq))))) 1817e38f8a7aSLuis R. Rodriguez return 0; 1818e38f8a7aSLuis R. Rodriguez 1819e38f8a7aSLuis R. Rodriguez reg_beacon = kzalloc(sizeof(struct reg_beacon), gfp); 1820e38f8a7aSLuis R. Rodriguez if (!reg_beacon) 1821e38f8a7aSLuis R. Rodriguez return -ENOMEM; 1822e38f8a7aSLuis R. Rodriguez 1823d91e41b6SLuis R. Rodriguez REG_DBG_PRINT("Found new beacon on " 1824e38f8a7aSLuis R. Rodriguez "frequency: %d MHz (Ch %d) on %s\n", 1825e38f8a7aSLuis R. Rodriguez beacon_chan->center_freq, 1826e38f8a7aSLuis R. Rodriguez ieee80211_frequency_to_channel(beacon_chan->center_freq), 1827e38f8a7aSLuis R. Rodriguez wiphy_name(wiphy)); 18284113f751SLuis R. Rodriguez 1829e38f8a7aSLuis R. Rodriguez memcpy(®_beacon->chan, beacon_chan, 1830e38f8a7aSLuis R. Rodriguez sizeof(struct ieee80211_channel)); 1831e38f8a7aSLuis R. Rodriguez 1832e38f8a7aSLuis R. Rodriguez 1833e38f8a7aSLuis R. Rodriguez /* 1834e38f8a7aSLuis R. Rodriguez * Since we can be called from BH or and non-BH context 1835e38f8a7aSLuis R. Rodriguez * we must use spin_lock_bh() 1836e38f8a7aSLuis R. Rodriguez */ 1837e38f8a7aSLuis R. Rodriguez spin_lock_bh(®_pending_beacons_lock); 1838e38f8a7aSLuis R. Rodriguez list_add_tail(®_beacon->list, ®_pending_beacons); 1839e38f8a7aSLuis R. Rodriguez spin_unlock_bh(®_pending_beacons_lock); 1840e38f8a7aSLuis R. Rodriguez 1841e38f8a7aSLuis R. Rodriguez schedule_work(®_work); 1842e38f8a7aSLuis R. Rodriguez 1843e38f8a7aSLuis R. Rodriguez return 0; 1844e38f8a7aSLuis R. Rodriguez } 1845e38f8a7aSLuis R. Rodriguez 1846a3d2eaf0SJohannes Berg static void print_rd_rules(const struct ieee80211_regdomain *rd) 1847b2e1b302SLuis R. Rodriguez { 1848b2e1b302SLuis R. Rodriguez unsigned int i; 1849a3d2eaf0SJohannes Berg const struct ieee80211_reg_rule *reg_rule = NULL; 1850a3d2eaf0SJohannes Berg const struct ieee80211_freq_range *freq_range = NULL; 1851a3d2eaf0SJohannes Berg const struct ieee80211_power_rule *power_rule = NULL; 1852b2e1b302SLuis R. Rodriguez 1853e9c0268fSJoe Perches pr_info(" (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)\n"); 1854b2e1b302SLuis R. Rodriguez 1855b2e1b302SLuis R. Rodriguez for (i = 0; i < rd->n_reg_rules; i++) { 1856b2e1b302SLuis R. Rodriguez reg_rule = &rd->reg_rules[i]; 1857b2e1b302SLuis R. Rodriguez freq_range = ®_rule->freq_range; 1858b2e1b302SLuis R. Rodriguez power_rule = ®_rule->power_rule; 1859b2e1b302SLuis R. Rodriguez 1860fb1fc7adSLuis R. Rodriguez /* 1861fb1fc7adSLuis R. Rodriguez * There may not be documentation for max antenna gain 1862fb1fc7adSLuis R. Rodriguez * in certain regions 1863fb1fc7adSLuis R. Rodriguez */ 1864b2e1b302SLuis R. Rodriguez if (power_rule->max_antenna_gain) 1865e9c0268fSJoe Perches pr_info(" (%d KHz - %d KHz @ %d KHz), (%d mBi, %d mBm)\n", 1866b2e1b302SLuis R. Rodriguez freq_range->start_freq_khz, 1867b2e1b302SLuis R. Rodriguez freq_range->end_freq_khz, 1868b2e1b302SLuis R. Rodriguez freq_range->max_bandwidth_khz, 1869b2e1b302SLuis R. Rodriguez power_rule->max_antenna_gain, 1870b2e1b302SLuis R. Rodriguez power_rule->max_eirp); 1871b2e1b302SLuis R. Rodriguez else 1872e9c0268fSJoe Perches pr_info(" (%d KHz - %d KHz @ %d KHz), (N/A, %d mBm)\n", 1873b2e1b302SLuis R. Rodriguez freq_range->start_freq_khz, 1874b2e1b302SLuis R. Rodriguez freq_range->end_freq_khz, 1875b2e1b302SLuis R. Rodriguez freq_range->max_bandwidth_khz, 1876b2e1b302SLuis R. Rodriguez power_rule->max_eirp); 1877b2e1b302SLuis R. Rodriguez } 1878b2e1b302SLuis R. Rodriguez } 1879b2e1b302SLuis R. Rodriguez 1880a3d2eaf0SJohannes Berg static void print_regdomain(const struct ieee80211_regdomain *rd) 1881b2e1b302SLuis R. Rodriguez { 1882b2e1b302SLuis R. Rodriguez 18833f2355cbSLuis R. Rodriguez if (is_intersected_alpha2(rd->alpha2)) { 18843f2355cbSLuis R. Rodriguez 18857db90f4aSLuis R. Rodriguez if (last_request->initiator == 18867db90f4aSLuis R. Rodriguez NL80211_REGDOM_SET_BY_COUNTRY_IE) { 188779c97e97SJohannes Berg struct cfg80211_registered_device *rdev; 188879c97e97SJohannes Berg rdev = cfg80211_rdev_by_wiphy_idx( 1889806a9e39SLuis R. Rodriguez last_request->wiphy_idx); 189079c97e97SJohannes Berg if (rdev) { 1891e9c0268fSJoe Perches pr_info("Current regulatory domain updated by AP to: %c%c\n", 189279c97e97SJohannes Berg rdev->country_ie_alpha2[0], 189379c97e97SJohannes Berg rdev->country_ie_alpha2[1]); 18943f2355cbSLuis R. Rodriguez } else 1895e9c0268fSJoe Perches pr_info("Current regulatory domain intersected:\n"); 18963f2355cbSLuis R. Rodriguez } else 1897e9c0268fSJoe Perches pr_info("Current regulatory domain intersected:\n"); 18983f2355cbSLuis R. Rodriguez } else if (is_world_regdom(rd->alpha2)) 1899e9c0268fSJoe Perches pr_info("World regulatory domain updated:\n"); 1900b2e1b302SLuis R. Rodriguez else { 1901b2e1b302SLuis R. Rodriguez if (is_unknown_alpha2(rd->alpha2)) 1902e9c0268fSJoe Perches pr_info("Regulatory domain changed to driver built-in settings (unknown country)\n"); 1903b2e1b302SLuis R. Rodriguez else 1904e9c0268fSJoe Perches pr_info("Regulatory domain changed to country: %c%c\n", 1905b2e1b302SLuis R. Rodriguez rd->alpha2[0], rd->alpha2[1]); 1906b2e1b302SLuis R. Rodriguez } 1907b2e1b302SLuis R. Rodriguez print_rd_rules(rd); 1908b2e1b302SLuis R. Rodriguez } 1909b2e1b302SLuis R. Rodriguez 19102df78167SJohannes Berg static void print_regdomain_info(const struct ieee80211_regdomain *rd) 1911b2e1b302SLuis R. Rodriguez { 1912e9c0268fSJoe Perches pr_info("Regulatory domain: %c%c\n", rd->alpha2[0], rd->alpha2[1]); 1913b2e1b302SLuis R. Rodriguez print_rd_rules(rd); 1914b2e1b302SLuis R. Rodriguez } 1915b2e1b302SLuis R. Rodriguez 1916d2372b31SJohannes Berg /* Takes ownership of rd only if it doesn't fail */ 1917a3d2eaf0SJohannes Berg static int __set_regdom(const struct ieee80211_regdomain *rd) 1918b2e1b302SLuis R. Rodriguez { 19199c96477dSLuis R. Rodriguez const struct ieee80211_regdomain *intersected_rd = NULL; 192079c97e97SJohannes Berg struct cfg80211_registered_device *rdev = NULL; 1921806a9e39SLuis R. Rodriguez struct wiphy *request_wiphy; 1922b2e1b302SLuis R. Rodriguez /* Some basic sanity checks first */ 1923b2e1b302SLuis R. Rodriguez 1924b2e1b302SLuis R. Rodriguez if (is_world_regdom(rd->alpha2)) { 1925f6037d09SJohannes Berg if (WARN_ON(!reg_is_valid_request(rd->alpha2))) 1926b2e1b302SLuis R. Rodriguez return -EINVAL; 1927b2e1b302SLuis R. Rodriguez update_world_regdomain(rd); 1928b2e1b302SLuis R. Rodriguez return 0; 1929b2e1b302SLuis R. Rodriguez } 1930b2e1b302SLuis R. Rodriguez 1931b2e1b302SLuis R. Rodriguez if (!is_alpha2_set(rd->alpha2) && !is_an_alpha2(rd->alpha2) && 1932b2e1b302SLuis R. Rodriguez !is_unknown_alpha2(rd->alpha2)) 1933b2e1b302SLuis R. Rodriguez return -EINVAL; 1934b2e1b302SLuis R. Rodriguez 1935f6037d09SJohannes Berg if (!last_request) 1936b2e1b302SLuis R. Rodriguez return -EINVAL; 1937b2e1b302SLuis R. Rodriguez 1938fb1fc7adSLuis R. Rodriguez /* 1939fb1fc7adSLuis R. Rodriguez * Lets only bother proceeding on the same alpha2 if the current 19403f2355cbSLuis R. Rodriguez * rd is non static (it means CRDA was present and was used last) 1941fb1fc7adSLuis R. Rodriguez * and the pending request came in from a country IE 1942fb1fc7adSLuis R. Rodriguez */ 19437db90f4aSLuis R. Rodriguez if (last_request->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE) { 1944fb1fc7adSLuis R. Rodriguez /* 1945fb1fc7adSLuis R. Rodriguez * If someone else asked us to change the rd lets only bother 1946fb1fc7adSLuis R. Rodriguez * checking if the alpha2 changes if CRDA was already called 1947fb1fc7adSLuis R. Rodriguez */ 1948baeb66feSJohn W. Linville if (!regdom_changes(rd->alpha2)) 1949b2e1b302SLuis R. Rodriguez return -EINVAL; 19503f2355cbSLuis R. Rodriguez } 19513f2355cbSLuis R. Rodriguez 1952fb1fc7adSLuis R. Rodriguez /* 1953fb1fc7adSLuis R. Rodriguez * Now lets set the regulatory domain, update all driver channels 1954b2e1b302SLuis R. Rodriguez * and finally inform them of what we have done, in case they want 1955b2e1b302SLuis R. Rodriguez * to review or adjust their own settings based on their own 1956fb1fc7adSLuis R. Rodriguez * internal EEPROM data 1957fb1fc7adSLuis R. Rodriguez */ 1958b2e1b302SLuis R. Rodriguez 1959f6037d09SJohannes Berg if (WARN_ON(!reg_is_valid_request(rd->alpha2))) 1960b2e1b302SLuis R. Rodriguez return -EINVAL; 1961b2e1b302SLuis R. Rodriguez 1962b2e1b302SLuis R. Rodriguez if (!is_valid_rd(rd)) { 1963e9c0268fSJoe Perches pr_err("Invalid regulatory domain detected:\n"); 1964b2e1b302SLuis R. Rodriguez print_regdomain_info(rd); 1965b2e1b302SLuis R. Rodriguez return -EINVAL; 1966b2e1b302SLuis R. Rodriguez } 1967b2e1b302SLuis R. Rodriguez 1968806a9e39SLuis R. Rodriguez request_wiphy = wiphy_idx_to_wiphy(last_request->wiphy_idx); 1969806a9e39SLuis R. Rodriguez 1970b8295acdSLuis R. Rodriguez if (!last_request->intersect) { 19713e0c3ff3SLuis R. Rodriguez int r; 19723e0c3ff3SLuis R. Rodriguez 19737db90f4aSLuis R. Rodriguez if (last_request->initiator != NL80211_REGDOM_SET_BY_DRIVER) { 19743e0c3ff3SLuis R. Rodriguez reset_regdomains(); 19753e0c3ff3SLuis R. Rodriguez cfg80211_regdomain = rd; 19763e0c3ff3SLuis R. Rodriguez return 0; 19773e0c3ff3SLuis R. Rodriguez } 19783e0c3ff3SLuis R. Rodriguez 1979fb1fc7adSLuis R. Rodriguez /* 1980fb1fc7adSLuis R. Rodriguez * For a driver hint, lets copy the regulatory domain the 1981fb1fc7adSLuis R. Rodriguez * driver wanted to the wiphy to deal with conflicts 1982fb1fc7adSLuis R. Rodriguez */ 19833e0c3ff3SLuis R. Rodriguez 1984558f6d32SLuis R. Rodriguez /* 1985558f6d32SLuis R. Rodriguez * Userspace could have sent two replies with only 1986558f6d32SLuis R. Rodriguez * one kernel request. 1987558f6d32SLuis R. Rodriguez */ 1988558f6d32SLuis R. Rodriguez if (request_wiphy->regd) 1989558f6d32SLuis R. Rodriguez return -EALREADY; 19903e0c3ff3SLuis R. Rodriguez 1991806a9e39SLuis R. Rodriguez r = reg_copy_regd(&request_wiphy->regd, rd); 19923e0c3ff3SLuis R. Rodriguez if (r) 19933e0c3ff3SLuis R. Rodriguez return r; 19943e0c3ff3SLuis R. Rodriguez 1995b8295acdSLuis R. Rodriguez reset_regdomains(); 1996b8295acdSLuis R. Rodriguez cfg80211_regdomain = rd; 1997b8295acdSLuis R. Rodriguez return 0; 1998b8295acdSLuis R. Rodriguez } 1999b8295acdSLuis R. Rodriguez 2000b8295acdSLuis R. Rodriguez /* Intersection requires a bit more work */ 2001b8295acdSLuis R. Rodriguez 20027db90f4aSLuis R. Rodriguez if (last_request->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE) { 2003b8295acdSLuis R. Rodriguez 20049c96477dSLuis R. Rodriguez intersected_rd = regdom_intersect(rd, cfg80211_regdomain); 20059c96477dSLuis R. Rodriguez if (!intersected_rd) 20069c96477dSLuis R. Rodriguez return -EINVAL; 2007b8295acdSLuis R. Rodriguez 2008fb1fc7adSLuis R. Rodriguez /* 2009fb1fc7adSLuis R. Rodriguez * We can trash what CRDA provided now. 20103e0c3ff3SLuis R. Rodriguez * However if a driver requested this specific regulatory 2011fb1fc7adSLuis R. Rodriguez * domain we keep it for its private use 2012fb1fc7adSLuis R. Rodriguez */ 20137db90f4aSLuis R. Rodriguez if (last_request->initiator == NL80211_REGDOM_SET_BY_DRIVER) 2014806a9e39SLuis R. Rodriguez request_wiphy->regd = rd; 20153e0c3ff3SLuis R. Rodriguez else 20169c96477dSLuis R. Rodriguez kfree(rd); 20173e0c3ff3SLuis R. Rodriguez 2018b8295acdSLuis R. Rodriguez rd = NULL; 2019b8295acdSLuis R. Rodriguez 2020b8295acdSLuis R. Rodriguez reset_regdomains(); 2021b8295acdSLuis R. Rodriguez cfg80211_regdomain = intersected_rd; 2022b8295acdSLuis R. Rodriguez 2023b8295acdSLuis R. Rodriguez return 0; 20249c96477dSLuis R. Rodriguez } 20259c96477dSLuis R. Rodriguez 20263f2355cbSLuis R. Rodriguez if (!intersected_rd) 20273f2355cbSLuis R. Rodriguez return -EINVAL; 20283f2355cbSLuis R. Rodriguez 202979c97e97SJohannes Berg rdev = wiphy_to_dev(request_wiphy); 20303f2355cbSLuis R. Rodriguez 203179c97e97SJohannes Berg rdev->country_ie_alpha2[0] = rd->alpha2[0]; 203279c97e97SJohannes Berg rdev->country_ie_alpha2[1] = rd->alpha2[1]; 203379c97e97SJohannes Berg rdev->env = last_request->country_ie_env; 20343f2355cbSLuis R. Rodriguez 20353f2355cbSLuis R. Rodriguez BUG_ON(intersected_rd == rd); 20363f2355cbSLuis R. Rodriguez 20373f2355cbSLuis R. Rodriguez kfree(rd); 20383f2355cbSLuis R. Rodriguez rd = NULL; 20393f2355cbSLuis R. Rodriguez 2040b8295acdSLuis R. Rodriguez reset_regdomains(); 20413f2355cbSLuis R. Rodriguez cfg80211_regdomain = intersected_rd; 2042b2e1b302SLuis R. Rodriguez 2043b2e1b302SLuis R. Rodriguez return 0; 2044b2e1b302SLuis R. Rodriguez } 2045b2e1b302SLuis R. Rodriguez 2046b2e1b302SLuis R. Rodriguez 2047fb1fc7adSLuis R. Rodriguez /* 2048fb1fc7adSLuis R. Rodriguez * Use this call to set the current regulatory domain. Conflicts with 2049b2e1b302SLuis R. Rodriguez * multiple drivers can be ironed out later. Caller must've already 2050fb1fc7adSLuis R. Rodriguez * kmalloc'd the rd structure. Caller must hold cfg80211_mutex 2051fb1fc7adSLuis R. Rodriguez */ 2052a3d2eaf0SJohannes Berg int set_regdom(const struct ieee80211_regdomain *rd) 2053b2e1b302SLuis R. Rodriguez { 2054b2e1b302SLuis R. Rodriguez int r; 2055b2e1b302SLuis R. Rodriguez 2056761cf7ecSLuis R. Rodriguez assert_cfg80211_lock(); 2057761cf7ecSLuis R. Rodriguez 2058abc7381bSLuis R. Rodriguez mutex_lock(®_mutex); 2059abc7381bSLuis R. Rodriguez 2060b2e1b302SLuis R. Rodriguez /* Note that this doesn't update the wiphys, this is done below */ 2061b2e1b302SLuis R. Rodriguez r = __set_regdom(rd); 2062d2372b31SJohannes Berg if (r) { 2063d2372b31SJohannes Berg kfree(rd); 2064abc7381bSLuis R. Rodriguez mutex_unlock(®_mutex); 2065b2e1b302SLuis R. Rodriguez return r; 2066d2372b31SJohannes Berg } 2067b2e1b302SLuis R. Rodriguez 2068b2e1b302SLuis R. Rodriguez /* This would make this whole thing pointless */ 2069a01ddafdSLuis R. Rodriguez if (!last_request->intersect) 2070b2e1b302SLuis R. Rodriguez BUG_ON(rd != cfg80211_regdomain); 2071b2e1b302SLuis R. Rodriguez 2072b2e1b302SLuis R. Rodriguez /* update all wiphys now with the new established regulatory domain */ 2073f6037d09SJohannes Berg update_all_wiphy_regulatory(last_request->initiator); 2074b2e1b302SLuis R. Rodriguez 2075a01ddafdSLuis R. Rodriguez print_regdomain(cfg80211_regdomain); 2076b2e1b302SLuis R. Rodriguez 207773d54c9eSLuis R. Rodriguez nl80211_send_reg_change_event(last_request); 207873d54c9eSLuis R. Rodriguez 2079b2e253cfSLuis R. Rodriguez reg_set_request_processed(); 2080b2e253cfSLuis R. Rodriguez 2081abc7381bSLuis R. Rodriguez mutex_unlock(®_mutex); 2082abc7381bSLuis R. Rodriguez 2083b2e1b302SLuis R. Rodriguez return r; 2084b2e1b302SLuis R. Rodriguez } 2085b2e1b302SLuis R. Rodriguez 20864d9d88d1SScott James Remnant #ifdef CONFIG_HOTPLUG 20874d9d88d1SScott James Remnant int reg_device_uevent(struct device *dev, struct kobj_uevent_env *env) 20884d9d88d1SScott James Remnant { 20894d9d88d1SScott James Remnant if (last_request && !last_request->processed) { 20904d9d88d1SScott James Remnant if (add_uevent_var(env, "COUNTRY=%c%c", 20914d9d88d1SScott James Remnant last_request->alpha2[0], 20924d9d88d1SScott James Remnant last_request->alpha2[1])) 20934d9d88d1SScott James Remnant return -ENOMEM; 20944d9d88d1SScott James Remnant } 20954d9d88d1SScott James Remnant 20964d9d88d1SScott James Remnant return 0; 20974d9d88d1SScott James Remnant } 20984d9d88d1SScott James Remnant #else 20994d9d88d1SScott James Remnant int reg_device_uevent(struct device *dev, struct kobj_uevent_env *env) 21004d9d88d1SScott James Remnant { 21014d9d88d1SScott James Remnant return -ENODEV; 21024d9d88d1SScott James Remnant } 21034d9d88d1SScott James Remnant #endif /* CONFIG_HOTPLUG */ 21044d9d88d1SScott James Remnant 2105a1794390SLuis R. Rodriguez /* Caller must hold cfg80211_mutex */ 21063f2355cbSLuis R. Rodriguez void reg_device_remove(struct wiphy *wiphy) 21073f2355cbSLuis R. Rodriguez { 21080ad8acafSLuis R. Rodriguez struct wiphy *request_wiphy = NULL; 2109806a9e39SLuis R. Rodriguez 2110761cf7ecSLuis R. Rodriguez assert_cfg80211_lock(); 2111761cf7ecSLuis R. Rodriguez 2112abc7381bSLuis R. Rodriguez mutex_lock(®_mutex); 2113abc7381bSLuis R. Rodriguez 21140ef9ccddSChris Wright kfree(wiphy->regd); 21150ef9ccddSChris Wright 21160ad8acafSLuis R. Rodriguez if (last_request) 2117806a9e39SLuis R. Rodriguez request_wiphy = wiphy_idx_to_wiphy(last_request->wiphy_idx); 2118806a9e39SLuis R. Rodriguez 21190ef9ccddSChris Wright if (!request_wiphy || request_wiphy != wiphy) 2120abc7381bSLuis R. Rodriguez goto out; 21210ef9ccddSChris Wright 2122806a9e39SLuis R. Rodriguez last_request->wiphy_idx = WIPHY_IDX_STALE; 21233f2355cbSLuis R. Rodriguez last_request->country_ie_env = ENVIRON_ANY; 2124abc7381bSLuis R. Rodriguez out: 2125abc7381bSLuis R. Rodriguez mutex_unlock(®_mutex); 21263f2355cbSLuis R. Rodriguez } 21273f2355cbSLuis R. Rodriguez 21282fcc9f73SUwe Kleine-König int __init regulatory_init(void) 2129b2e1b302SLuis R. Rodriguez { 2130bcf4f99bSLuis R. Rodriguez int err = 0; 2131734366deSJohannes Berg 2132b2e1b302SLuis R. Rodriguez reg_pdev = platform_device_register_simple("regulatory", 0, NULL, 0); 2133b2e1b302SLuis R. Rodriguez if (IS_ERR(reg_pdev)) 2134b2e1b302SLuis R. Rodriguez return PTR_ERR(reg_pdev); 2135734366deSJohannes Berg 21364d9d88d1SScott James Remnant reg_pdev->dev.type = ®_device_type; 21374d9d88d1SScott James Remnant 2138fe33eb39SLuis R. Rodriguez spin_lock_init(®_requests_lock); 2139e38f8a7aSLuis R. Rodriguez spin_lock_init(®_pending_beacons_lock); 2140fe33eb39SLuis R. Rodriguez 2141a3d2eaf0SJohannes Berg cfg80211_regdomain = cfg80211_world_regdom; 2142734366deSJohannes Berg 214309d989d1SLuis R. Rodriguez user_alpha2[0] = '9'; 214409d989d1SLuis R. Rodriguez user_alpha2[1] = '7'; 214509d989d1SLuis R. Rodriguez 2146ae9e4b0dSLuis R. Rodriguez /* We always try to get an update for the static regdomain */ 2147ae9e4b0dSLuis R. Rodriguez err = regulatory_hint_core(cfg80211_regdomain->alpha2); 2148bcf4f99bSLuis R. Rodriguez if (err) { 2149bcf4f99bSLuis R. Rodriguez if (err == -ENOMEM) 2150bcf4f99bSLuis R. Rodriguez return err; 2151bcf4f99bSLuis R. Rodriguez /* 2152bcf4f99bSLuis R. Rodriguez * N.B. kobject_uevent_env() can fail mainly for when we're out 2153bcf4f99bSLuis R. Rodriguez * memory which is handled and propagated appropriately above 2154bcf4f99bSLuis R. Rodriguez * but it can also fail during a netlink_broadcast() or during 2155bcf4f99bSLuis R. Rodriguez * early boot for call_usermodehelper(). For now treat these 2156bcf4f99bSLuis R. Rodriguez * errors as non-fatal. 2157bcf4f99bSLuis R. Rodriguez */ 2158e9c0268fSJoe Perches pr_err("kobject_uevent_env() was unable to call CRDA during init\n"); 2159bcf4f99bSLuis R. Rodriguez #ifdef CONFIG_CFG80211_REG_DEBUG 2160bcf4f99bSLuis R. Rodriguez /* We want to find out exactly why when debugging */ 2161bcf4f99bSLuis R. Rodriguez WARN_ON(err); 2162bcf4f99bSLuis R. Rodriguez #endif 2163bcf4f99bSLuis R. Rodriguez } 2164734366deSJohannes Berg 2165ae9e4b0dSLuis R. Rodriguez /* 2166ae9e4b0dSLuis R. Rodriguez * Finally, if the user set the module parameter treat it 2167ae9e4b0dSLuis R. Rodriguez * as a user hint. 2168ae9e4b0dSLuis R. Rodriguez */ 2169ae9e4b0dSLuis R. Rodriguez if (!is_world_regdom(ieee80211_regdom)) 2170ae9e4b0dSLuis R. Rodriguez regulatory_hint_user(ieee80211_regdom); 2171ae9e4b0dSLuis R. Rodriguez 2172b2e1b302SLuis R. Rodriguez return 0; 2173b2e1b302SLuis R. Rodriguez } 2174b2e1b302SLuis R. Rodriguez 21752fcc9f73SUwe Kleine-König void /* __init_or_exit */ regulatory_exit(void) 2176b2e1b302SLuis R. Rodriguez { 2177fe33eb39SLuis R. Rodriguez struct regulatory_request *reg_request, *tmp; 2178e38f8a7aSLuis R. Rodriguez struct reg_beacon *reg_beacon, *btmp; 2179fe33eb39SLuis R. Rodriguez 2180fe33eb39SLuis R. Rodriguez cancel_work_sync(®_work); 2181fe33eb39SLuis R. Rodriguez 2182a1794390SLuis R. Rodriguez mutex_lock(&cfg80211_mutex); 2183abc7381bSLuis R. Rodriguez mutex_lock(®_mutex); 2184734366deSJohannes Berg 2185b2e1b302SLuis R. Rodriguez reset_regdomains(); 2186734366deSJohannes Berg 2187f6037d09SJohannes Berg kfree(last_request); 2188f6037d09SJohannes Berg 2189b2e1b302SLuis R. Rodriguez platform_device_unregister(reg_pdev); 2190734366deSJohannes Berg 2191e38f8a7aSLuis R. Rodriguez spin_lock_bh(®_pending_beacons_lock); 2192e38f8a7aSLuis R. Rodriguez if (!list_empty(®_pending_beacons)) { 2193e38f8a7aSLuis R. Rodriguez list_for_each_entry_safe(reg_beacon, btmp, 2194e38f8a7aSLuis R. Rodriguez ®_pending_beacons, list) { 2195e38f8a7aSLuis R. Rodriguez list_del(®_beacon->list); 2196e38f8a7aSLuis R. Rodriguez kfree(reg_beacon); 2197e38f8a7aSLuis R. Rodriguez } 2198e38f8a7aSLuis R. Rodriguez } 2199e38f8a7aSLuis R. Rodriguez spin_unlock_bh(®_pending_beacons_lock); 2200e38f8a7aSLuis R. Rodriguez 2201e38f8a7aSLuis R. Rodriguez if (!list_empty(®_beacon_list)) { 2202e38f8a7aSLuis R. Rodriguez list_for_each_entry_safe(reg_beacon, btmp, 2203e38f8a7aSLuis R. Rodriguez ®_beacon_list, list) { 2204e38f8a7aSLuis R. Rodriguez list_del(®_beacon->list); 2205e38f8a7aSLuis R. Rodriguez kfree(reg_beacon); 2206e38f8a7aSLuis R. Rodriguez } 2207e38f8a7aSLuis R. Rodriguez } 2208e38f8a7aSLuis R. Rodriguez 2209fe33eb39SLuis R. Rodriguez spin_lock(®_requests_lock); 2210fe33eb39SLuis R. Rodriguez if (!list_empty(®_requests_list)) { 2211fe33eb39SLuis R. Rodriguez list_for_each_entry_safe(reg_request, tmp, 2212fe33eb39SLuis R. Rodriguez ®_requests_list, list) { 2213fe33eb39SLuis R. Rodriguez list_del(®_request->list); 2214fe33eb39SLuis R. Rodriguez kfree(reg_request); 2215fe33eb39SLuis R. Rodriguez } 2216fe33eb39SLuis R. Rodriguez } 2217fe33eb39SLuis R. Rodriguez spin_unlock(®_requests_lock); 2218fe33eb39SLuis R. Rodriguez 2219abc7381bSLuis R. Rodriguez mutex_unlock(®_mutex); 2220a1794390SLuis R. Rodriguez mutex_unlock(&cfg80211_mutex); 22218318d78aSJohannes Berg } 2222