18318d78aSJohannes Berg /* 28318d78aSJohannes Berg * Copyright 2002-2005, Instant802 Networks, Inc. 38318d78aSJohannes Berg * Copyright 2005-2006, Devicescape Software, Inc. 48318d78aSJohannes Berg * Copyright 2007 Johannes Berg <johannes@sipsolutions.net> 5b2e1b302SLuis R. Rodriguez * Copyright 2008 Luis R. Rodriguez <lrodriguz@atheros.com> 68318d78aSJohannes Berg * 78318d78aSJohannes Berg * This program is free software; you can redistribute it and/or modify 88318d78aSJohannes Berg * it under the terms of the GNU General Public License version 2 as 98318d78aSJohannes Berg * published by the Free Software Foundation. 108318d78aSJohannes Berg */ 118318d78aSJohannes Berg 12b2e1b302SLuis R. Rodriguez /** 13b2e1b302SLuis R. Rodriguez * DOC: Wireless regulatory infrastructure 148318d78aSJohannes Berg * 158318d78aSJohannes Berg * The usual implementation is for a driver to read a device EEPROM to 168318d78aSJohannes Berg * determine which regulatory domain it should be operating under, then 178318d78aSJohannes Berg * looking up the allowable channels in a driver-local table and finally 188318d78aSJohannes Berg * registering those channels in the wiphy structure. 198318d78aSJohannes Berg * 20b2e1b302SLuis R. Rodriguez * Another set of compliance enforcement is for drivers to use their 21b2e1b302SLuis R. Rodriguez * own compliance limits which can be stored on the EEPROM. The host 22b2e1b302SLuis R. Rodriguez * driver or firmware may ensure these are used. 23b2e1b302SLuis R. Rodriguez * 24b2e1b302SLuis R. Rodriguez * In addition to all this we provide an extra layer of regulatory 25b2e1b302SLuis R. Rodriguez * conformance. For drivers which do not have any regulatory 26b2e1b302SLuis R. Rodriguez * information CRDA provides the complete regulatory solution. 27b2e1b302SLuis R. Rodriguez * For others it provides a community effort on further restrictions 28b2e1b302SLuis R. Rodriguez * to enhance compliance. 29b2e1b302SLuis R. Rodriguez * 30b2e1b302SLuis R. Rodriguez * Note: When number of rules --> infinity we will not be able to 31b2e1b302SLuis R. Rodriguez * index on alpha2 any more, instead we'll probably have to 32b2e1b302SLuis R. Rodriguez * rely on some SHA1 checksum of the regdomain for example. 33b2e1b302SLuis R. Rodriguez * 348318d78aSJohannes Berg */ 358318d78aSJohannes Berg #include <linux/kernel.h> 36b2e1b302SLuis R. Rodriguez #include <linux/list.h> 37b2e1b302SLuis R. Rodriguez #include <linux/random.h> 38b2e1b302SLuis R. Rodriguez #include <linux/nl80211.h> 39b2e1b302SLuis R. Rodriguez #include <linux/platform_device.h> 40b2e1b302SLuis R. Rodriguez #include <net/cfg80211.h> 418318d78aSJohannes Berg #include "core.h" 42b2e1b302SLuis R. Rodriguez #include "reg.h" 4373d54c9eSLuis R. Rodriguez #include "nl80211.h" 448318d78aSJohannes Berg 455166ccd2SLuis R. Rodriguez /* Receipt of information from last regulatory request */ 46f6037d09SJohannes Berg static struct regulatory_request *last_request; 47734366deSJohannes Berg 48b2e1b302SLuis R. Rodriguez /* To trigger userspace events */ 49b2e1b302SLuis R. Rodriguez static struct platform_device *reg_pdev; 508318d78aSJohannes Berg 51fb1fc7adSLuis R. Rodriguez /* 52fb1fc7adSLuis R. Rodriguez * Central wireless core regulatory domains, we only need two, 53734366deSJohannes Berg * the current one and a world regulatory domain in case we have no 54fb1fc7adSLuis R. Rodriguez * information to give us an alpha2 55fb1fc7adSLuis R. Rodriguez */ 56f130347cSLuis R. Rodriguez const struct ieee80211_regdomain *cfg80211_regdomain; 57734366deSJohannes Berg 58fb1fc7adSLuis R. Rodriguez /* 59fb1fc7adSLuis R. Rodriguez * We use this as a place for the rd structure built from the 603f2355cbSLuis R. Rodriguez * last parsed country IE to rest until CRDA gets back to us with 61fb1fc7adSLuis R. Rodriguez * what it thinks should apply for the same country 62fb1fc7adSLuis R. Rodriguez */ 633f2355cbSLuis R. Rodriguez static const struct ieee80211_regdomain *country_ie_regdomain; 643f2355cbSLuis R. Rodriguez 65abc7381bSLuis R. Rodriguez /* 66abc7381bSLuis R. Rodriguez * Protects static reg.c components: 67abc7381bSLuis R. Rodriguez * - cfg80211_world_regdom 68abc7381bSLuis R. Rodriguez * - cfg80211_regdom 69abc7381bSLuis R. Rodriguez * - country_ie_regdomain 70abc7381bSLuis R. Rodriguez * - last_request 71abc7381bSLuis R. Rodriguez */ 72abc7381bSLuis R. Rodriguez DEFINE_MUTEX(reg_mutex); 73abc7381bSLuis R. Rodriguez #define assert_reg_lock() WARN_ON(!mutex_is_locked(®_mutex)) 74abc7381bSLuis R. Rodriguez 75e38f8a7aSLuis R. Rodriguez /* Used to queue up regulatory hints */ 76fe33eb39SLuis R. Rodriguez static LIST_HEAD(reg_requests_list); 77fe33eb39SLuis R. Rodriguez static spinlock_t reg_requests_lock; 78fe33eb39SLuis R. Rodriguez 79e38f8a7aSLuis R. Rodriguez /* Used to queue up beacon hints for review */ 80e38f8a7aSLuis R. Rodriguez static LIST_HEAD(reg_pending_beacons); 81e38f8a7aSLuis R. Rodriguez static spinlock_t reg_pending_beacons_lock; 82e38f8a7aSLuis R. Rodriguez 83e38f8a7aSLuis R. Rodriguez /* Used to keep track of processed beacon hints */ 84e38f8a7aSLuis R. Rodriguez static LIST_HEAD(reg_beacon_list); 85e38f8a7aSLuis R. Rodriguez 86e38f8a7aSLuis R. Rodriguez struct reg_beacon { 87e38f8a7aSLuis R. Rodriguez struct list_head list; 88e38f8a7aSLuis R. Rodriguez struct ieee80211_channel chan; 89e38f8a7aSLuis R. Rodriguez }; 90e38f8a7aSLuis R. Rodriguez 91734366deSJohannes Berg /* We keep a static world regulatory domain in case of the absence of CRDA */ 92734366deSJohannes Berg static const struct ieee80211_regdomain world_regdom = { 93611b6a82SLuis R. Rodriguez .n_reg_rules = 5, 94734366deSJohannes Berg .alpha2 = "00", 95734366deSJohannes Berg .reg_rules = { 9668798a62SLuis R. Rodriguez /* IEEE 802.11b/g, channels 1..11 */ 9768798a62SLuis R. Rodriguez REG_RULE(2412-10, 2462+10, 40, 6, 20, 0), 98611b6a82SLuis R. Rodriguez /* IEEE 802.11b/g, channels 12..13. No HT40 99611b6a82SLuis R. Rodriguez * channel fits here. */ 100611b6a82SLuis R. Rodriguez REG_RULE(2467-10, 2472+10, 20, 6, 20, 101611b6a82SLuis R. Rodriguez NL80211_RRF_PASSIVE_SCAN | 102611b6a82SLuis R. Rodriguez NL80211_RRF_NO_IBSS), 103611b6a82SLuis R. Rodriguez /* IEEE 802.11 channel 14 - Only JP enables 104611b6a82SLuis R. Rodriguez * this and for 802.11b only */ 105611b6a82SLuis R. Rodriguez REG_RULE(2484-10, 2484+10, 20, 6, 20, 106611b6a82SLuis R. Rodriguez NL80211_RRF_PASSIVE_SCAN | 107611b6a82SLuis R. Rodriguez NL80211_RRF_NO_IBSS | 108611b6a82SLuis R. Rodriguez NL80211_RRF_NO_OFDM), 1093fc71f77SLuis R. Rodriguez /* IEEE 802.11a, channel 36..48 */ 110ec329aceSLuis R. Rodriguez REG_RULE(5180-10, 5240+10, 40, 6, 20, 1113fc71f77SLuis R. Rodriguez NL80211_RRF_PASSIVE_SCAN | 1123fc71f77SLuis R. Rodriguez NL80211_RRF_NO_IBSS), 1133fc71f77SLuis R. Rodriguez 1143fc71f77SLuis R. Rodriguez /* NB: 5260 MHz - 5700 MHz requies DFS */ 1153fc71f77SLuis R. Rodriguez 1163fc71f77SLuis R. Rodriguez /* IEEE 802.11a, channel 149..165 */ 117ec329aceSLuis R. Rodriguez REG_RULE(5745-10, 5825+10, 40, 6, 20, 1183fc71f77SLuis R. Rodriguez NL80211_RRF_PASSIVE_SCAN | 1193fc71f77SLuis R. Rodriguez NL80211_RRF_NO_IBSS), 120734366deSJohannes Berg } 121734366deSJohannes Berg }; 122734366deSJohannes Berg 123a3d2eaf0SJohannes Berg static const struct ieee80211_regdomain *cfg80211_world_regdom = 124a3d2eaf0SJohannes Berg &world_regdom; 125734366deSJohannes Berg 1266ee7d330SLuis R. Rodriguez static char *ieee80211_regdom = "00"; 1276ee7d330SLuis R. Rodriguez 128734366deSJohannes Berg module_param(ieee80211_regdom, charp, 0444); 129734366deSJohannes Berg MODULE_PARM_DESC(ieee80211_regdom, "IEEE 802.11 regulatory domain code"); 130734366deSJohannes Berg 1316ee7d330SLuis R. Rodriguez #ifdef CONFIG_WIRELESS_OLD_REGULATORY 132fb1fc7adSLuis R. Rodriguez /* 133fb1fc7adSLuis R. Rodriguez * We assume 40 MHz bandwidth for the old regulatory work. 134734366deSJohannes Berg * We make emphasis we are using the exact same frequencies 135fb1fc7adSLuis R. Rodriguez * as before 136fb1fc7adSLuis R. Rodriguez */ 137734366deSJohannes Berg 138734366deSJohannes Berg static const struct ieee80211_regdomain us_regdom = { 139734366deSJohannes Berg .n_reg_rules = 6, 140734366deSJohannes Berg .alpha2 = "US", 141734366deSJohannes Berg .reg_rules = { 142734366deSJohannes Berg /* IEEE 802.11b/g, channels 1..11 */ 143734366deSJohannes Berg REG_RULE(2412-10, 2462+10, 40, 6, 27, 0), 144734366deSJohannes Berg /* IEEE 802.11a, channel 36 */ 145734366deSJohannes Berg REG_RULE(5180-10, 5180+10, 40, 6, 23, 0), 146734366deSJohannes Berg /* IEEE 802.11a, channel 40 */ 147734366deSJohannes Berg REG_RULE(5200-10, 5200+10, 40, 6, 23, 0), 148734366deSJohannes Berg /* IEEE 802.11a, channel 44 */ 149734366deSJohannes Berg REG_RULE(5220-10, 5220+10, 40, 6, 23, 0), 150734366deSJohannes Berg /* IEEE 802.11a, channels 48..64 */ 151734366deSJohannes Berg REG_RULE(5240-10, 5320+10, 40, 6, 23, 0), 152734366deSJohannes Berg /* IEEE 802.11a, channels 149..165, outdoor */ 153734366deSJohannes Berg REG_RULE(5745-10, 5825+10, 40, 6, 30, 0), 154734366deSJohannes Berg } 155734366deSJohannes Berg }; 156734366deSJohannes Berg 157734366deSJohannes Berg static const struct ieee80211_regdomain jp_regdom = { 158734366deSJohannes Berg .n_reg_rules = 3, 159734366deSJohannes Berg .alpha2 = "JP", 160734366deSJohannes Berg .reg_rules = { 161734366deSJohannes Berg /* IEEE 802.11b/g, channels 1..14 */ 162734366deSJohannes Berg REG_RULE(2412-10, 2484+10, 40, 6, 20, 0), 163734366deSJohannes Berg /* IEEE 802.11a, channels 34..48 */ 164734366deSJohannes Berg REG_RULE(5170-10, 5240+10, 40, 6, 20, 165734366deSJohannes Berg NL80211_RRF_PASSIVE_SCAN), 166734366deSJohannes Berg /* IEEE 802.11a, channels 52..64 */ 167734366deSJohannes Berg REG_RULE(5260-10, 5320+10, 40, 6, 20, 168734366deSJohannes Berg NL80211_RRF_NO_IBSS | 169734366deSJohannes Berg NL80211_RRF_DFS), 170734366deSJohannes Berg } 171734366deSJohannes Berg }; 172734366deSJohannes Berg 173734366deSJohannes Berg static const struct ieee80211_regdomain eu_regdom = { 174734366deSJohannes Berg .n_reg_rules = 6, 175fb1fc7adSLuis R. Rodriguez /* 176fb1fc7adSLuis R. Rodriguez * This alpha2 is bogus, we leave it here just for stupid 177fb1fc7adSLuis R. Rodriguez * backward compatibility 178fb1fc7adSLuis R. Rodriguez */ 179734366deSJohannes Berg .alpha2 = "EU", 180734366deSJohannes Berg .reg_rules = { 181734366deSJohannes Berg /* IEEE 802.11b/g, channels 1..13 */ 182734366deSJohannes Berg REG_RULE(2412-10, 2472+10, 40, 6, 20, 0), 183734366deSJohannes Berg /* IEEE 802.11a, channel 36 */ 184734366deSJohannes Berg REG_RULE(5180-10, 5180+10, 40, 6, 23, 185734366deSJohannes Berg NL80211_RRF_PASSIVE_SCAN), 186734366deSJohannes Berg /* IEEE 802.11a, channel 40 */ 187734366deSJohannes Berg REG_RULE(5200-10, 5200+10, 40, 6, 23, 188734366deSJohannes Berg NL80211_RRF_PASSIVE_SCAN), 189734366deSJohannes Berg /* IEEE 802.11a, channel 44 */ 190734366deSJohannes Berg REG_RULE(5220-10, 5220+10, 40, 6, 23, 191734366deSJohannes Berg NL80211_RRF_PASSIVE_SCAN), 192734366deSJohannes Berg /* IEEE 802.11a, channels 48..64 */ 193734366deSJohannes Berg REG_RULE(5240-10, 5320+10, 40, 6, 20, 194734366deSJohannes Berg NL80211_RRF_NO_IBSS | 195734366deSJohannes Berg NL80211_RRF_DFS), 196734366deSJohannes Berg /* IEEE 802.11a, channels 100..140 */ 197734366deSJohannes Berg REG_RULE(5500-10, 5700+10, 40, 6, 30, 198734366deSJohannes Berg NL80211_RRF_NO_IBSS | 199734366deSJohannes Berg NL80211_RRF_DFS), 200734366deSJohannes Berg } 201734366deSJohannes Berg }; 202734366deSJohannes Berg 203734366deSJohannes Berg static const struct ieee80211_regdomain *static_regdom(char *alpha2) 204734366deSJohannes Berg { 205734366deSJohannes Berg if (alpha2[0] == 'U' && alpha2[1] == 'S') 206734366deSJohannes Berg return &us_regdom; 207734366deSJohannes Berg if (alpha2[0] == 'J' && alpha2[1] == 'P') 208734366deSJohannes Berg return &jp_regdom; 209734366deSJohannes Berg if (alpha2[0] == 'E' && alpha2[1] == 'U') 210734366deSJohannes Berg return &eu_regdom; 211734366deSJohannes Berg /* Default, as per the old rules */ 212734366deSJohannes Berg return &us_regdom; 213734366deSJohannes Berg } 214734366deSJohannes Berg 215a3d2eaf0SJohannes Berg static bool is_old_static_regdom(const struct ieee80211_regdomain *rd) 216734366deSJohannes Berg { 217734366deSJohannes Berg if (rd == &us_regdom || rd == &jp_regdom || rd == &eu_regdom) 218734366deSJohannes Berg return true; 219734366deSJohannes Berg return false; 220734366deSJohannes Berg } 221734366deSJohannes Berg #else 222942b25cfSJohannes Berg static inline bool is_old_static_regdom(const struct ieee80211_regdomain *rd) 223942b25cfSJohannes Berg { 224942b25cfSJohannes Berg return false; 225942b25cfSJohannes Berg } 226942b25cfSJohannes Berg #endif 227942b25cfSJohannes Berg 228734366deSJohannes Berg static void reset_regdomains(void) 229734366deSJohannes Berg { 230942b25cfSJohannes Berg /* avoid freeing static information or freeing something twice */ 231942b25cfSJohannes Berg if (cfg80211_regdomain == cfg80211_world_regdom) 232942b25cfSJohannes Berg cfg80211_regdomain = NULL; 233942b25cfSJohannes Berg if (cfg80211_world_regdom == &world_regdom) 234942b25cfSJohannes Berg cfg80211_world_regdom = NULL; 235942b25cfSJohannes Berg if (cfg80211_regdomain == &world_regdom) 236942b25cfSJohannes Berg cfg80211_regdomain = NULL; 237942b25cfSJohannes Berg if (is_old_static_regdom(cfg80211_regdomain)) 238942b25cfSJohannes Berg cfg80211_regdomain = NULL; 239942b25cfSJohannes Berg 240734366deSJohannes Berg kfree(cfg80211_regdomain); 241734366deSJohannes Berg kfree(cfg80211_world_regdom); 242734366deSJohannes Berg 243a3d2eaf0SJohannes Berg cfg80211_world_regdom = &world_regdom; 244734366deSJohannes Berg cfg80211_regdomain = NULL; 245734366deSJohannes Berg } 246734366deSJohannes Berg 247fb1fc7adSLuis R. Rodriguez /* 248fb1fc7adSLuis R. Rodriguez * Dynamic world regulatory domain requested by the wireless 249fb1fc7adSLuis R. Rodriguez * core upon initialization 250fb1fc7adSLuis R. Rodriguez */ 251a3d2eaf0SJohannes Berg static void update_world_regdomain(const struct ieee80211_regdomain *rd) 252734366deSJohannes Berg { 253f6037d09SJohannes Berg BUG_ON(!last_request); 254734366deSJohannes Berg 255734366deSJohannes Berg reset_regdomains(); 256734366deSJohannes Berg 257734366deSJohannes Berg cfg80211_world_regdom = rd; 258734366deSJohannes Berg cfg80211_regdomain = rd; 259734366deSJohannes Berg } 260734366deSJohannes Berg 261a3d2eaf0SJohannes Berg bool is_world_regdom(const char *alpha2) 262b2e1b302SLuis R. Rodriguez { 263b2e1b302SLuis R. Rodriguez if (!alpha2) 264b2e1b302SLuis R. Rodriguez return false; 265b2e1b302SLuis R. Rodriguez if (alpha2[0] == '0' && alpha2[1] == '0') 266b2e1b302SLuis R. Rodriguez return true; 267b2e1b302SLuis R. Rodriguez return false; 268b2e1b302SLuis R. Rodriguez } 269b2e1b302SLuis R. Rodriguez 270a3d2eaf0SJohannes Berg static bool is_alpha2_set(const char *alpha2) 271b2e1b302SLuis R. Rodriguez { 272b2e1b302SLuis R. Rodriguez if (!alpha2) 273b2e1b302SLuis R. Rodriguez return false; 274b2e1b302SLuis R. Rodriguez if (alpha2[0] != 0 && alpha2[1] != 0) 275b2e1b302SLuis R. Rodriguez return true; 276b2e1b302SLuis R. Rodriguez return false; 277b2e1b302SLuis R. Rodriguez } 278b2e1b302SLuis R. Rodriguez 279b2e1b302SLuis R. Rodriguez static bool is_alpha_upper(char letter) 280b2e1b302SLuis R. Rodriguez { 281b2e1b302SLuis R. Rodriguez /* ASCII A - Z */ 282b2e1b302SLuis R. Rodriguez if (letter >= 65 && letter <= 90) 283b2e1b302SLuis R. Rodriguez return true; 284b2e1b302SLuis R. Rodriguez return false; 285b2e1b302SLuis R. Rodriguez } 286b2e1b302SLuis R. Rodriguez 287a3d2eaf0SJohannes Berg static bool is_unknown_alpha2(const char *alpha2) 288b2e1b302SLuis R. Rodriguez { 289b2e1b302SLuis R. Rodriguez if (!alpha2) 290b2e1b302SLuis R. Rodriguez return false; 291fb1fc7adSLuis R. Rodriguez /* 292fb1fc7adSLuis R. Rodriguez * Special case where regulatory domain was built by driver 293fb1fc7adSLuis R. Rodriguez * but a specific alpha2 cannot be determined 294fb1fc7adSLuis R. Rodriguez */ 295b2e1b302SLuis R. Rodriguez if (alpha2[0] == '9' && alpha2[1] == '9') 296b2e1b302SLuis R. Rodriguez return true; 297b2e1b302SLuis R. Rodriguez return false; 298b2e1b302SLuis R. Rodriguez } 299b2e1b302SLuis R. Rodriguez 3003f2355cbSLuis R. Rodriguez static bool is_intersected_alpha2(const char *alpha2) 3013f2355cbSLuis R. Rodriguez { 3023f2355cbSLuis R. Rodriguez if (!alpha2) 3033f2355cbSLuis R. Rodriguez return false; 304fb1fc7adSLuis R. Rodriguez /* 305fb1fc7adSLuis R. Rodriguez * Special case where regulatory domain is the 3063f2355cbSLuis R. Rodriguez * result of an intersection between two regulatory domain 307fb1fc7adSLuis R. Rodriguez * structures 308fb1fc7adSLuis R. Rodriguez */ 3093f2355cbSLuis R. Rodriguez if (alpha2[0] == '9' && alpha2[1] == '8') 3103f2355cbSLuis R. Rodriguez return true; 3113f2355cbSLuis R. Rodriguez return false; 3123f2355cbSLuis R. Rodriguez } 3133f2355cbSLuis R. Rodriguez 314a3d2eaf0SJohannes Berg static bool is_an_alpha2(const char *alpha2) 315b2e1b302SLuis R. Rodriguez { 316b2e1b302SLuis R. Rodriguez if (!alpha2) 317b2e1b302SLuis R. Rodriguez return false; 318b2e1b302SLuis R. Rodriguez if (is_alpha_upper(alpha2[0]) && is_alpha_upper(alpha2[1])) 319b2e1b302SLuis R. Rodriguez return true; 320b2e1b302SLuis R. Rodriguez return false; 321b2e1b302SLuis R. Rodriguez } 322b2e1b302SLuis R. Rodriguez 323a3d2eaf0SJohannes Berg static bool alpha2_equal(const char *alpha2_x, const char *alpha2_y) 324b2e1b302SLuis R. Rodriguez { 325b2e1b302SLuis R. Rodriguez if (!alpha2_x || !alpha2_y) 326b2e1b302SLuis R. Rodriguez return false; 327b2e1b302SLuis R. Rodriguez if (alpha2_x[0] == alpha2_y[0] && 328b2e1b302SLuis R. Rodriguez alpha2_x[1] == alpha2_y[1]) 329b2e1b302SLuis R. Rodriguez return true; 330b2e1b302SLuis R. Rodriguez return false; 331b2e1b302SLuis R. Rodriguez } 332b2e1b302SLuis R. Rodriguez 33369b1572bSLuis R. Rodriguez static bool regdom_changes(const char *alpha2) 334b2e1b302SLuis R. Rodriguez { 335761cf7ecSLuis R. Rodriguez assert_cfg80211_lock(); 336761cf7ecSLuis R. Rodriguez 337b2e1b302SLuis R. Rodriguez if (!cfg80211_regdomain) 338b2e1b302SLuis R. Rodriguez return true; 339b2e1b302SLuis R. Rodriguez if (alpha2_equal(cfg80211_regdomain->alpha2, alpha2)) 340b2e1b302SLuis R. Rodriguez return false; 341b2e1b302SLuis R. Rodriguez return true; 342b2e1b302SLuis R. Rodriguez } 343b2e1b302SLuis R. Rodriguez 3443f2355cbSLuis R. Rodriguez /** 3453f2355cbSLuis R. Rodriguez * country_ie_integrity_changes - tells us if the country IE has changed 3463f2355cbSLuis R. Rodriguez * @checksum: checksum of country IE of fields we are interested in 3473f2355cbSLuis R. Rodriguez * 3483f2355cbSLuis R. Rodriguez * If the country IE has not changed you can ignore it safely. This is 3493f2355cbSLuis R. Rodriguez * useful to determine if two devices are seeing two different country IEs 3503f2355cbSLuis R. Rodriguez * even on the same alpha2. Note that this will return false if no IE has 3513f2355cbSLuis R. Rodriguez * been set on the wireless core yet. 3523f2355cbSLuis R. Rodriguez */ 3533f2355cbSLuis R. Rodriguez static bool country_ie_integrity_changes(u32 checksum) 3543f2355cbSLuis R. Rodriguez { 3553f2355cbSLuis R. Rodriguez /* If no IE has been set then the checksum doesn't change */ 3563f2355cbSLuis R. Rodriguez if (unlikely(!last_request->country_ie_checksum)) 3573f2355cbSLuis R. Rodriguez return false; 3583f2355cbSLuis R. Rodriguez if (unlikely(last_request->country_ie_checksum != checksum)) 3593f2355cbSLuis R. Rodriguez return true; 3603f2355cbSLuis R. Rodriguez return false; 3613f2355cbSLuis R. Rodriguez } 3623f2355cbSLuis R. Rodriguez 363fb1fc7adSLuis R. Rodriguez /* 364fb1fc7adSLuis R. Rodriguez * This lets us keep regulatory code which is updated on a regulatory 365fb1fc7adSLuis R. Rodriguez * basis in userspace. 366fb1fc7adSLuis R. Rodriguez */ 367b2e1b302SLuis R. Rodriguez static int call_crda(const char *alpha2) 368b2e1b302SLuis R. Rodriguez { 369b2e1b302SLuis R. Rodriguez char country_env[9 + 2] = "COUNTRY="; 370b2e1b302SLuis R. Rodriguez char *envp[] = { 371b2e1b302SLuis R. Rodriguez country_env, 372b2e1b302SLuis R. Rodriguez NULL 3738318d78aSJohannes Berg }; 3748318d78aSJohannes Berg 375b2e1b302SLuis R. Rodriguez if (!is_world_regdom((char *) alpha2)) 376b2e1b302SLuis R. Rodriguez printk(KERN_INFO "cfg80211: Calling CRDA for country: %c%c\n", 377b2e1b302SLuis R. Rodriguez alpha2[0], alpha2[1]); 378b2e1b302SLuis R. Rodriguez else 379b2e1b302SLuis R. Rodriguez printk(KERN_INFO "cfg80211: Calling CRDA to update world " 380b2e1b302SLuis R. Rodriguez "regulatory domain\n"); 3818318d78aSJohannes Berg 382b2e1b302SLuis R. Rodriguez country_env[8] = alpha2[0]; 383b2e1b302SLuis R. Rodriguez country_env[9] = alpha2[1]; 3848318d78aSJohannes Berg 385b2e1b302SLuis R. Rodriguez return kobject_uevent_env(®_pdev->dev.kobj, KOBJ_CHANGE, envp); 386b2e1b302SLuis R. Rodriguez } 387b2e1b302SLuis R. Rodriguez 388b2e1b302SLuis R. Rodriguez /* Used by nl80211 before kmalloc'ing our regulatory domain */ 389a3d2eaf0SJohannes Berg bool reg_is_valid_request(const char *alpha2) 390b2e1b302SLuis R. Rodriguez { 39161405e97SLuis R. Rodriguez assert_cfg80211_lock(); 39261405e97SLuis R. Rodriguez 393f6037d09SJohannes Berg if (!last_request) 394f6037d09SJohannes Berg return false; 395f6037d09SJohannes Berg 396f6037d09SJohannes Berg return alpha2_equal(last_request->alpha2, alpha2); 397b2e1b302SLuis R. Rodriguez } 398b2e1b302SLuis R. Rodriguez 399b2e1b302SLuis R. Rodriguez /* Sanity check on a regulatory rule */ 400a3d2eaf0SJohannes Berg static bool is_valid_reg_rule(const struct ieee80211_reg_rule *rule) 401b2e1b302SLuis R. Rodriguez { 402a3d2eaf0SJohannes Berg const struct ieee80211_freq_range *freq_range = &rule->freq_range; 403b2e1b302SLuis R. Rodriguez u32 freq_diff; 404b2e1b302SLuis R. Rodriguez 40591e99004SLuis R. Rodriguez if (freq_range->start_freq_khz <= 0 || freq_range->end_freq_khz <= 0) 406b2e1b302SLuis R. Rodriguez return false; 407b2e1b302SLuis R. Rodriguez 408b2e1b302SLuis R. Rodriguez if (freq_range->start_freq_khz > freq_range->end_freq_khz) 409b2e1b302SLuis R. Rodriguez return false; 410b2e1b302SLuis R. Rodriguez 411b2e1b302SLuis R. Rodriguez freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz; 412b2e1b302SLuis R. Rodriguez 413bd05f28eSRoel Kluin if (freq_range->end_freq_khz <= freq_range->start_freq_khz || 414bd05f28eSRoel Kluin freq_range->max_bandwidth_khz > freq_diff) 415b2e1b302SLuis R. Rodriguez return false; 416b2e1b302SLuis R. Rodriguez 417b2e1b302SLuis R. Rodriguez return true; 418b2e1b302SLuis R. Rodriguez } 419b2e1b302SLuis R. Rodriguez 420a3d2eaf0SJohannes Berg static bool is_valid_rd(const struct ieee80211_regdomain *rd) 421b2e1b302SLuis R. Rodriguez { 422a3d2eaf0SJohannes Berg const struct ieee80211_reg_rule *reg_rule = NULL; 423b2e1b302SLuis R. Rodriguez unsigned int i; 424b2e1b302SLuis R. Rodriguez 425b2e1b302SLuis R. Rodriguez if (!rd->n_reg_rules) 426b2e1b302SLuis R. Rodriguez return false; 427b2e1b302SLuis R. Rodriguez 42888dc1c3fSLuis R. Rodriguez if (WARN_ON(rd->n_reg_rules > NL80211_MAX_SUPP_REG_RULES)) 42988dc1c3fSLuis R. Rodriguez return false; 43088dc1c3fSLuis R. Rodriguez 431b2e1b302SLuis R. Rodriguez for (i = 0; i < rd->n_reg_rules; i++) { 432b2e1b302SLuis R. Rodriguez reg_rule = &rd->reg_rules[i]; 433b2e1b302SLuis R. Rodriguez if (!is_valid_reg_rule(reg_rule)) 434b2e1b302SLuis R. Rodriguez return false; 435b2e1b302SLuis R. Rodriguez } 436b2e1b302SLuis R. Rodriguez 437b2e1b302SLuis R. Rodriguez return true; 438b2e1b302SLuis R. Rodriguez } 439b2e1b302SLuis R. Rodriguez 440038659e7SLuis R. Rodriguez static bool reg_does_bw_fit(const struct ieee80211_freq_range *freq_range, 441038659e7SLuis R. Rodriguez u32 center_freq_khz, 442038659e7SLuis R. Rodriguez u32 bw_khz) 443b2e1b302SLuis R. Rodriguez { 444038659e7SLuis R. Rodriguez u32 start_freq_khz, end_freq_khz; 445038659e7SLuis R. Rodriguez 446038659e7SLuis R. Rodriguez start_freq_khz = center_freq_khz - (bw_khz/2); 447038659e7SLuis R. Rodriguez end_freq_khz = center_freq_khz + (bw_khz/2); 448038659e7SLuis R. Rodriguez 449b2e1b302SLuis R. Rodriguez if (start_freq_khz >= freq_range->start_freq_khz && 450b2e1b302SLuis R. Rodriguez end_freq_khz <= freq_range->end_freq_khz) 451038659e7SLuis R. Rodriguez return true; 452038659e7SLuis R. Rodriguez 453038659e7SLuis R. Rodriguez return false; 454b2e1b302SLuis R. Rodriguez } 455b2e1b302SLuis R. Rodriguez 4560c7dc45dSLuis R. Rodriguez /** 4570c7dc45dSLuis R. Rodriguez * freq_in_rule_band - tells us if a frequency is in a frequency band 4580c7dc45dSLuis R. Rodriguez * @freq_range: frequency rule we want to query 4590c7dc45dSLuis R. Rodriguez * @freq_khz: frequency we are inquiring about 4600c7dc45dSLuis R. Rodriguez * 4610c7dc45dSLuis R. Rodriguez * This lets us know if a specific frequency rule is or is not relevant to 4620c7dc45dSLuis R. Rodriguez * a specific frequency's band. Bands are device specific and artificial 4630c7dc45dSLuis R. Rodriguez * definitions (the "2.4 GHz band" and the "5 GHz band"), however it is 4640c7dc45dSLuis R. Rodriguez * safe for now to assume that a frequency rule should not be part of a 4650c7dc45dSLuis R. Rodriguez * frequency's band if the start freq or end freq are off by more than 2 GHz. 4660c7dc45dSLuis R. Rodriguez * This resolution can be lowered and should be considered as we add 4670c7dc45dSLuis R. Rodriguez * regulatory rule support for other "bands". 4680c7dc45dSLuis R. Rodriguez **/ 4690c7dc45dSLuis R. Rodriguez static bool freq_in_rule_band(const struct ieee80211_freq_range *freq_range, 4700c7dc45dSLuis R. Rodriguez u32 freq_khz) 4710c7dc45dSLuis R. Rodriguez { 4720c7dc45dSLuis R. Rodriguez #define ONE_GHZ_IN_KHZ 1000000 4730c7dc45dSLuis R. Rodriguez if (abs(freq_khz - freq_range->start_freq_khz) <= (2 * ONE_GHZ_IN_KHZ)) 4740c7dc45dSLuis R. Rodriguez return true; 4750c7dc45dSLuis R. Rodriguez if (abs(freq_khz - freq_range->end_freq_khz) <= (2 * ONE_GHZ_IN_KHZ)) 4760c7dc45dSLuis R. Rodriguez return true; 4770c7dc45dSLuis R. Rodriguez return false; 4780c7dc45dSLuis R. Rodriguez #undef ONE_GHZ_IN_KHZ 4790c7dc45dSLuis R. Rodriguez } 4800c7dc45dSLuis R. Rodriguez 481fb1fc7adSLuis R. Rodriguez /* 482fb1fc7adSLuis R. Rodriguez * Converts a country IE to a regulatory domain. A regulatory domain 4833f2355cbSLuis R. Rodriguez * structure has a lot of information which the IE doesn't yet have, 4843f2355cbSLuis R. Rodriguez * so for the other values we use upper max values as we will intersect 485fb1fc7adSLuis R. Rodriguez * with our userspace regulatory agent to get lower bounds. 486fb1fc7adSLuis R. Rodriguez */ 4873f2355cbSLuis R. Rodriguez static struct ieee80211_regdomain *country_ie_2_rd( 4883f2355cbSLuis R. Rodriguez u8 *country_ie, 4893f2355cbSLuis R. Rodriguez u8 country_ie_len, 4903f2355cbSLuis R. Rodriguez u32 *checksum) 4913f2355cbSLuis R. Rodriguez { 4923f2355cbSLuis R. Rodriguez struct ieee80211_regdomain *rd = NULL; 4933f2355cbSLuis R. Rodriguez unsigned int i = 0; 4943f2355cbSLuis R. Rodriguez char alpha2[2]; 4953f2355cbSLuis R. Rodriguez u32 flags = 0; 4963f2355cbSLuis R. Rodriguez u32 num_rules = 0, size_of_regd = 0; 4973f2355cbSLuis R. Rodriguez u8 *triplets_start = NULL; 4983f2355cbSLuis R. Rodriguez u8 len_at_triplet = 0; 4993f2355cbSLuis R. Rodriguez /* the last channel we have registered in a subband (triplet) */ 5003f2355cbSLuis R. Rodriguez int last_sub_max_channel = 0; 5013f2355cbSLuis R. Rodriguez 5023f2355cbSLuis R. Rodriguez *checksum = 0xDEADBEEF; 5033f2355cbSLuis R. Rodriguez 5043f2355cbSLuis R. Rodriguez /* Country IE requirements */ 5053f2355cbSLuis R. Rodriguez BUG_ON(country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN || 5063f2355cbSLuis R. Rodriguez country_ie_len & 0x01); 5073f2355cbSLuis R. Rodriguez 5083f2355cbSLuis R. Rodriguez alpha2[0] = country_ie[0]; 5093f2355cbSLuis R. Rodriguez alpha2[1] = country_ie[1]; 5103f2355cbSLuis R. Rodriguez 5113f2355cbSLuis R. Rodriguez /* 5123f2355cbSLuis R. Rodriguez * Third octet can be: 5133f2355cbSLuis R. Rodriguez * 'I' - Indoor 5143f2355cbSLuis R. Rodriguez * 'O' - Outdoor 5153f2355cbSLuis R. Rodriguez * 5163f2355cbSLuis R. Rodriguez * anything else we assume is no restrictions 5173f2355cbSLuis R. Rodriguez */ 5183f2355cbSLuis R. Rodriguez if (country_ie[2] == 'I') 5193f2355cbSLuis R. Rodriguez flags = NL80211_RRF_NO_OUTDOOR; 5203f2355cbSLuis R. Rodriguez else if (country_ie[2] == 'O') 5213f2355cbSLuis R. Rodriguez flags = NL80211_RRF_NO_INDOOR; 5223f2355cbSLuis R. Rodriguez 5233f2355cbSLuis R. Rodriguez country_ie += 3; 5243f2355cbSLuis R. Rodriguez country_ie_len -= 3; 5253f2355cbSLuis R. Rodriguez 5263f2355cbSLuis R. Rodriguez triplets_start = country_ie; 5273f2355cbSLuis R. Rodriguez len_at_triplet = country_ie_len; 5283f2355cbSLuis R. Rodriguez 5293f2355cbSLuis R. Rodriguez *checksum ^= ((flags ^ alpha2[0] ^ alpha2[1]) << 8); 5303f2355cbSLuis R. Rodriguez 531fb1fc7adSLuis R. Rodriguez /* 532fb1fc7adSLuis R. Rodriguez * We need to build a reg rule for each triplet, but first we must 5333f2355cbSLuis R. Rodriguez * calculate the number of reg rules we will need. We will need one 534fb1fc7adSLuis R. Rodriguez * for each channel subband 535fb1fc7adSLuis R. Rodriguez */ 5363f2355cbSLuis R. Rodriguez while (country_ie_len >= 3) { 537615aab4bSLuis R. Rodriguez int end_channel = 0; 5383f2355cbSLuis R. Rodriguez struct ieee80211_country_ie_triplet *triplet = 5393f2355cbSLuis R. Rodriguez (struct ieee80211_country_ie_triplet *) country_ie; 5403f2355cbSLuis R. Rodriguez int cur_sub_max_channel = 0, cur_channel = 0; 5413f2355cbSLuis R. Rodriguez 5423f2355cbSLuis R. Rodriguez if (triplet->ext.reg_extension_id >= 5433f2355cbSLuis R. Rodriguez IEEE80211_COUNTRY_EXTENSION_ID) { 5443f2355cbSLuis R. Rodriguez country_ie += 3; 5453f2355cbSLuis R. Rodriguez country_ie_len -= 3; 5463f2355cbSLuis R. Rodriguez continue; 5473f2355cbSLuis R. Rodriguez } 5483f2355cbSLuis R. Rodriguez 549615aab4bSLuis R. Rodriguez /* 2 GHz */ 550615aab4bSLuis R. Rodriguez if (triplet->chans.first_channel <= 14) 551615aab4bSLuis R. Rodriguez end_channel = triplet->chans.first_channel + 552615aab4bSLuis R. Rodriguez triplet->chans.num_channels; 553615aab4bSLuis R. Rodriguez else 554615aab4bSLuis R. Rodriguez /* 555615aab4bSLuis R. Rodriguez * 5 GHz -- For example in country IEs if the first 556615aab4bSLuis R. Rodriguez * channel given is 36 and the number of channels is 4 557615aab4bSLuis R. Rodriguez * then the individual channel numbers defined for the 558615aab4bSLuis R. Rodriguez * 5 GHz PHY by these parameters are: 36, 40, 44, and 48 559615aab4bSLuis R. Rodriguez * and not 36, 37, 38, 39. 560615aab4bSLuis R. Rodriguez * 561615aab4bSLuis R. Rodriguez * See: http://tinyurl.com/11d-clarification 562615aab4bSLuis R. Rodriguez */ 563615aab4bSLuis R. Rodriguez end_channel = triplet->chans.first_channel + 564615aab4bSLuis R. Rodriguez (4 * (triplet->chans.num_channels - 1)); 565615aab4bSLuis R. Rodriguez 5663f2355cbSLuis R. Rodriguez cur_channel = triplet->chans.first_channel; 567615aab4bSLuis R. Rodriguez cur_sub_max_channel = end_channel; 5683f2355cbSLuis R. Rodriguez 5693f2355cbSLuis R. Rodriguez /* Basic sanity check */ 5703f2355cbSLuis R. Rodriguez if (cur_sub_max_channel < cur_channel) 5713f2355cbSLuis R. Rodriguez return NULL; 5723f2355cbSLuis R. Rodriguez 573fb1fc7adSLuis R. Rodriguez /* 574fb1fc7adSLuis R. Rodriguez * Do not allow overlapping channels. Also channels 5753f2355cbSLuis R. Rodriguez * passed in each subband must be monotonically 576fb1fc7adSLuis R. Rodriguez * increasing 577fb1fc7adSLuis R. Rodriguez */ 5783f2355cbSLuis R. Rodriguez if (last_sub_max_channel) { 5793f2355cbSLuis R. Rodriguez if (cur_channel <= last_sub_max_channel) 5803f2355cbSLuis R. Rodriguez return NULL; 5813f2355cbSLuis R. Rodriguez if (cur_sub_max_channel <= last_sub_max_channel) 5823f2355cbSLuis R. Rodriguez return NULL; 5833f2355cbSLuis R. Rodriguez } 5843f2355cbSLuis R. Rodriguez 585fb1fc7adSLuis R. Rodriguez /* 586fb1fc7adSLuis R. Rodriguez * When dot11RegulatoryClassesRequired is supported 5873f2355cbSLuis R. Rodriguez * we can throw ext triplets as part of this soup, 5883f2355cbSLuis R. Rodriguez * for now we don't care when those change as we 589fb1fc7adSLuis R. Rodriguez * don't support them 590fb1fc7adSLuis R. Rodriguez */ 5913f2355cbSLuis R. Rodriguez *checksum ^= ((cur_channel ^ cur_sub_max_channel) << 8) | 5923f2355cbSLuis R. Rodriguez ((cur_sub_max_channel ^ cur_sub_max_channel) << 16) | 5933f2355cbSLuis R. Rodriguez ((triplet->chans.max_power ^ cur_sub_max_channel) << 24); 5943f2355cbSLuis R. Rodriguez 5953f2355cbSLuis R. Rodriguez last_sub_max_channel = cur_sub_max_channel; 5963f2355cbSLuis R. Rodriguez 5973f2355cbSLuis R. Rodriguez country_ie += 3; 5983f2355cbSLuis R. Rodriguez country_ie_len -= 3; 5993f2355cbSLuis R. Rodriguez num_rules++; 6003f2355cbSLuis R. Rodriguez 601fb1fc7adSLuis R. Rodriguez /* 602fb1fc7adSLuis R. Rodriguez * Note: this is not a IEEE requirement but 603fb1fc7adSLuis R. Rodriguez * simply a memory requirement 604fb1fc7adSLuis R. Rodriguez */ 6053f2355cbSLuis R. Rodriguez if (num_rules > NL80211_MAX_SUPP_REG_RULES) 6063f2355cbSLuis R. Rodriguez return NULL; 6073f2355cbSLuis R. Rodriguez } 6083f2355cbSLuis R. Rodriguez 6093f2355cbSLuis R. Rodriguez country_ie = triplets_start; 6103f2355cbSLuis R. Rodriguez country_ie_len = len_at_triplet; 6113f2355cbSLuis R. Rodriguez 6123f2355cbSLuis R. Rodriguez size_of_regd = sizeof(struct ieee80211_regdomain) + 6133f2355cbSLuis R. Rodriguez (num_rules * sizeof(struct ieee80211_reg_rule)); 6143f2355cbSLuis R. Rodriguez 6153f2355cbSLuis R. Rodriguez rd = kzalloc(size_of_regd, GFP_KERNEL); 6163f2355cbSLuis R. Rodriguez if (!rd) 6173f2355cbSLuis R. Rodriguez return NULL; 6183f2355cbSLuis R. Rodriguez 6193f2355cbSLuis R. Rodriguez rd->n_reg_rules = num_rules; 6203f2355cbSLuis R. Rodriguez rd->alpha2[0] = alpha2[0]; 6213f2355cbSLuis R. Rodriguez rd->alpha2[1] = alpha2[1]; 6223f2355cbSLuis R. Rodriguez 6233f2355cbSLuis R. Rodriguez /* This time around we fill in the rd */ 6243f2355cbSLuis R. Rodriguez while (country_ie_len >= 3) { 62502e68a3dSLuis R. Rodriguez int end_channel = 0; 6263f2355cbSLuis R. Rodriguez struct ieee80211_country_ie_triplet *triplet = 6273f2355cbSLuis R. Rodriguez (struct ieee80211_country_ie_triplet *) country_ie; 6283f2355cbSLuis R. Rodriguez struct ieee80211_reg_rule *reg_rule = NULL; 6293f2355cbSLuis R. Rodriguez struct ieee80211_freq_range *freq_range = NULL; 6303f2355cbSLuis R. Rodriguez struct ieee80211_power_rule *power_rule = NULL; 6313f2355cbSLuis R. Rodriguez 632fb1fc7adSLuis R. Rodriguez /* 633fb1fc7adSLuis R. Rodriguez * Must parse if dot11RegulatoryClassesRequired is true, 634fb1fc7adSLuis R. Rodriguez * we don't support this yet 635fb1fc7adSLuis R. Rodriguez */ 6363f2355cbSLuis R. Rodriguez if (triplet->ext.reg_extension_id >= 6373f2355cbSLuis R. Rodriguez IEEE80211_COUNTRY_EXTENSION_ID) { 6383f2355cbSLuis R. Rodriguez country_ie += 3; 6393f2355cbSLuis R. Rodriguez country_ie_len -= 3; 6403f2355cbSLuis R. Rodriguez continue; 6413f2355cbSLuis R. Rodriguez } 6423f2355cbSLuis R. Rodriguez 6433f2355cbSLuis R. Rodriguez reg_rule = &rd->reg_rules[i]; 6443f2355cbSLuis R. Rodriguez freq_range = ®_rule->freq_range; 6453f2355cbSLuis R. Rodriguez power_rule = ®_rule->power_rule; 6463f2355cbSLuis R. Rodriguez 6473f2355cbSLuis R. Rodriguez reg_rule->flags = flags; 6483f2355cbSLuis R. Rodriguez 64902e68a3dSLuis R. Rodriguez /* 2 GHz */ 65002e68a3dSLuis R. Rodriguez if (triplet->chans.first_channel <= 14) 65102e68a3dSLuis R. Rodriguez end_channel = triplet->chans.first_channel + 65202e68a3dSLuis R. Rodriguez triplet->chans.num_channels; 65302e68a3dSLuis R. Rodriguez else 65402e68a3dSLuis R. Rodriguez end_channel = triplet->chans.first_channel + 65502e68a3dSLuis R. Rodriguez (4 * (triplet->chans.num_channels - 1)); 65602e68a3dSLuis R. Rodriguez 657fb1fc7adSLuis R. Rodriguez /* 658fb1fc7adSLuis R. Rodriguez * The +10 is since the regulatory domain expects 6593f2355cbSLuis R. Rodriguez * the actual band edge, not the center of freq for 6603f2355cbSLuis R. Rodriguez * its start and end freqs, assuming 20 MHz bandwidth on 661fb1fc7adSLuis R. Rodriguez * the channels passed 662fb1fc7adSLuis R. Rodriguez */ 6633f2355cbSLuis R. Rodriguez freq_range->start_freq_khz = 6643f2355cbSLuis R. Rodriguez MHZ_TO_KHZ(ieee80211_channel_to_frequency( 6653f2355cbSLuis R. Rodriguez triplet->chans.first_channel) - 10); 6663f2355cbSLuis R. Rodriguez freq_range->end_freq_khz = 6673f2355cbSLuis R. Rodriguez MHZ_TO_KHZ(ieee80211_channel_to_frequency( 66802e68a3dSLuis R. Rodriguez end_channel) + 10); 6693f2355cbSLuis R. Rodriguez 670fb1fc7adSLuis R. Rodriguez /* 671fb1fc7adSLuis R. Rodriguez * These are large arbitrary values we use to intersect later. 672fb1fc7adSLuis R. Rodriguez * Increment this if we ever support >= 40 MHz channels 673fb1fc7adSLuis R. Rodriguez * in IEEE 802.11 674fb1fc7adSLuis R. Rodriguez */ 6753f2355cbSLuis R. Rodriguez freq_range->max_bandwidth_khz = MHZ_TO_KHZ(40); 6763f2355cbSLuis R. Rodriguez power_rule->max_antenna_gain = DBI_TO_MBI(100); 6773f2355cbSLuis R. Rodriguez power_rule->max_eirp = DBM_TO_MBM(100); 6783f2355cbSLuis R. Rodriguez 6793f2355cbSLuis R. Rodriguez country_ie += 3; 6803f2355cbSLuis R. Rodriguez country_ie_len -= 3; 6813f2355cbSLuis R. Rodriguez i++; 6823f2355cbSLuis R. Rodriguez 6833f2355cbSLuis R. Rodriguez BUG_ON(i > NL80211_MAX_SUPP_REG_RULES); 6843f2355cbSLuis R. Rodriguez } 6853f2355cbSLuis R. Rodriguez 6863f2355cbSLuis R. Rodriguez return rd; 6873f2355cbSLuis R. Rodriguez } 6883f2355cbSLuis R. Rodriguez 6893f2355cbSLuis R. Rodriguez 690fb1fc7adSLuis R. Rodriguez /* 691fb1fc7adSLuis R. Rodriguez * Helper for regdom_intersect(), this does the real 692fb1fc7adSLuis R. Rodriguez * mathematical intersection fun 693fb1fc7adSLuis R. Rodriguez */ 6949c96477dSLuis R. Rodriguez static int reg_rules_intersect( 6959c96477dSLuis R. Rodriguez const struct ieee80211_reg_rule *rule1, 6969c96477dSLuis R. Rodriguez const struct ieee80211_reg_rule *rule2, 6979c96477dSLuis R. Rodriguez struct ieee80211_reg_rule *intersected_rule) 6989c96477dSLuis R. Rodriguez { 6999c96477dSLuis R. Rodriguez const struct ieee80211_freq_range *freq_range1, *freq_range2; 7009c96477dSLuis R. Rodriguez struct ieee80211_freq_range *freq_range; 7019c96477dSLuis R. Rodriguez const struct ieee80211_power_rule *power_rule1, *power_rule2; 7029c96477dSLuis R. Rodriguez struct ieee80211_power_rule *power_rule; 7039c96477dSLuis R. Rodriguez u32 freq_diff; 7049c96477dSLuis R. Rodriguez 7059c96477dSLuis R. Rodriguez freq_range1 = &rule1->freq_range; 7069c96477dSLuis R. Rodriguez freq_range2 = &rule2->freq_range; 7079c96477dSLuis R. Rodriguez freq_range = &intersected_rule->freq_range; 7089c96477dSLuis R. Rodriguez 7099c96477dSLuis R. Rodriguez power_rule1 = &rule1->power_rule; 7109c96477dSLuis R. Rodriguez power_rule2 = &rule2->power_rule; 7119c96477dSLuis R. Rodriguez power_rule = &intersected_rule->power_rule; 7129c96477dSLuis R. Rodriguez 7139c96477dSLuis R. Rodriguez freq_range->start_freq_khz = max(freq_range1->start_freq_khz, 7149c96477dSLuis R. Rodriguez freq_range2->start_freq_khz); 7159c96477dSLuis R. Rodriguez freq_range->end_freq_khz = min(freq_range1->end_freq_khz, 7169c96477dSLuis R. Rodriguez freq_range2->end_freq_khz); 7179c96477dSLuis R. Rodriguez freq_range->max_bandwidth_khz = min(freq_range1->max_bandwidth_khz, 7189c96477dSLuis R. Rodriguez freq_range2->max_bandwidth_khz); 7199c96477dSLuis R. Rodriguez 7209c96477dSLuis R. Rodriguez freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz; 7219c96477dSLuis R. Rodriguez if (freq_range->max_bandwidth_khz > freq_diff) 7229c96477dSLuis R. Rodriguez freq_range->max_bandwidth_khz = freq_diff; 7239c96477dSLuis R. Rodriguez 7249c96477dSLuis R. Rodriguez power_rule->max_eirp = min(power_rule1->max_eirp, 7259c96477dSLuis R. Rodriguez power_rule2->max_eirp); 7269c96477dSLuis R. Rodriguez power_rule->max_antenna_gain = min(power_rule1->max_antenna_gain, 7279c96477dSLuis R. Rodriguez power_rule2->max_antenna_gain); 7289c96477dSLuis R. Rodriguez 7299c96477dSLuis R. Rodriguez intersected_rule->flags = (rule1->flags | rule2->flags); 7309c96477dSLuis R. Rodriguez 7319c96477dSLuis R. Rodriguez if (!is_valid_reg_rule(intersected_rule)) 7329c96477dSLuis R. Rodriguez return -EINVAL; 7339c96477dSLuis R. Rodriguez 7349c96477dSLuis R. Rodriguez return 0; 7359c96477dSLuis R. Rodriguez } 7369c96477dSLuis R. Rodriguez 7379c96477dSLuis R. Rodriguez /** 7389c96477dSLuis R. Rodriguez * regdom_intersect - do the intersection between two regulatory domains 7399c96477dSLuis R. Rodriguez * @rd1: first regulatory domain 7409c96477dSLuis R. Rodriguez * @rd2: second regulatory domain 7419c96477dSLuis R. Rodriguez * 7429c96477dSLuis R. Rodriguez * Use this function to get the intersection between two regulatory domains. 7439c96477dSLuis R. Rodriguez * Once completed we will mark the alpha2 for the rd as intersected, "98", 7449c96477dSLuis R. Rodriguez * as no one single alpha2 can represent this regulatory domain. 7459c96477dSLuis R. Rodriguez * 7469c96477dSLuis R. Rodriguez * Returns a pointer to the regulatory domain structure which will hold the 7479c96477dSLuis R. Rodriguez * resulting intersection of rules between rd1 and rd2. We will 7489c96477dSLuis R. Rodriguez * kzalloc() this structure for you. 7499c96477dSLuis R. Rodriguez */ 7509c96477dSLuis R. Rodriguez static struct ieee80211_regdomain *regdom_intersect( 7519c96477dSLuis R. Rodriguez const struct ieee80211_regdomain *rd1, 7529c96477dSLuis R. Rodriguez const struct ieee80211_regdomain *rd2) 7539c96477dSLuis R. Rodriguez { 7549c96477dSLuis R. Rodriguez int r, size_of_regd; 7559c96477dSLuis R. Rodriguez unsigned int x, y; 7569c96477dSLuis R. Rodriguez unsigned int num_rules = 0, rule_idx = 0; 7579c96477dSLuis R. Rodriguez const struct ieee80211_reg_rule *rule1, *rule2; 7589c96477dSLuis R. Rodriguez struct ieee80211_reg_rule *intersected_rule; 7599c96477dSLuis R. Rodriguez struct ieee80211_regdomain *rd; 7609c96477dSLuis R. Rodriguez /* This is just a dummy holder to help us count */ 7619c96477dSLuis R. Rodriguez struct ieee80211_reg_rule irule; 7629c96477dSLuis R. Rodriguez 7639c96477dSLuis R. Rodriguez /* Uses the stack temporarily for counter arithmetic */ 7649c96477dSLuis R. Rodriguez intersected_rule = &irule; 7659c96477dSLuis R. Rodriguez 7669c96477dSLuis R. Rodriguez memset(intersected_rule, 0, sizeof(struct ieee80211_reg_rule)); 7679c96477dSLuis R. Rodriguez 7689c96477dSLuis R. Rodriguez if (!rd1 || !rd2) 7699c96477dSLuis R. Rodriguez return NULL; 7709c96477dSLuis R. Rodriguez 771fb1fc7adSLuis R. Rodriguez /* 772fb1fc7adSLuis R. Rodriguez * First we get a count of the rules we'll need, then we actually 7739c96477dSLuis R. Rodriguez * build them. This is to so we can malloc() and free() a 7749c96477dSLuis R. Rodriguez * regdomain once. The reason we use reg_rules_intersect() here 7759c96477dSLuis R. Rodriguez * is it will return -EINVAL if the rule computed makes no sense. 776fb1fc7adSLuis R. Rodriguez * All rules that do check out OK are valid. 777fb1fc7adSLuis R. Rodriguez */ 7789c96477dSLuis R. Rodriguez 7799c96477dSLuis R. Rodriguez for (x = 0; x < rd1->n_reg_rules; x++) { 7809c96477dSLuis R. Rodriguez rule1 = &rd1->reg_rules[x]; 7819c96477dSLuis R. Rodriguez for (y = 0; y < rd2->n_reg_rules; y++) { 7829c96477dSLuis R. Rodriguez rule2 = &rd2->reg_rules[y]; 7839c96477dSLuis R. Rodriguez if (!reg_rules_intersect(rule1, rule2, 7849c96477dSLuis R. Rodriguez intersected_rule)) 7859c96477dSLuis R. Rodriguez num_rules++; 7869c96477dSLuis R. Rodriguez memset(intersected_rule, 0, 7879c96477dSLuis R. Rodriguez sizeof(struct ieee80211_reg_rule)); 7889c96477dSLuis R. Rodriguez } 7899c96477dSLuis R. Rodriguez } 7909c96477dSLuis R. Rodriguez 7919c96477dSLuis R. Rodriguez if (!num_rules) 7929c96477dSLuis R. Rodriguez return NULL; 7939c96477dSLuis R. Rodriguez 7949c96477dSLuis R. Rodriguez size_of_regd = sizeof(struct ieee80211_regdomain) + 7959c96477dSLuis R. Rodriguez ((num_rules + 1) * sizeof(struct ieee80211_reg_rule)); 7969c96477dSLuis R. Rodriguez 7979c96477dSLuis R. Rodriguez rd = kzalloc(size_of_regd, GFP_KERNEL); 7989c96477dSLuis R. Rodriguez if (!rd) 7999c96477dSLuis R. Rodriguez return NULL; 8009c96477dSLuis R. Rodriguez 8019c96477dSLuis R. Rodriguez for (x = 0; x < rd1->n_reg_rules; x++) { 8029c96477dSLuis R. Rodriguez rule1 = &rd1->reg_rules[x]; 8039c96477dSLuis R. Rodriguez for (y = 0; y < rd2->n_reg_rules; y++) { 8049c96477dSLuis R. Rodriguez rule2 = &rd2->reg_rules[y]; 805fb1fc7adSLuis R. Rodriguez /* 806fb1fc7adSLuis R. Rodriguez * This time around instead of using the stack lets 8079c96477dSLuis R. Rodriguez * write to the target rule directly saving ourselves 808fb1fc7adSLuis R. Rodriguez * a memcpy() 809fb1fc7adSLuis R. Rodriguez */ 8109c96477dSLuis R. Rodriguez intersected_rule = &rd->reg_rules[rule_idx]; 8119c96477dSLuis R. Rodriguez r = reg_rules_intersect(rule1, rule2, 8129c96477dSLuis R. Rodriguez intersected_rule); 813fb1fc7adSLuis R. Rodriguez /* 814fb1fc7adSLuis R. Rodriguez * No need to memset here the intersected rule here as 815fb1fc7adSLuis R. Rodriguez * we're not using the stack anymore 816fb1fc7adSLuis R. Rodriguez */ 8179c96477dSLuis R. Rodriguez if (r) 8189c96477dSLuis R. Rodriguez continue; 8199c96477dSLuis R. Rodriguez rule_idx++; 8209c96477dSLuis R. Rodriguez } 8219c96477dSLuis R. Rodriguez } 8229c96477dSLuis R. Rodriguez 8239c96477dSLuis R. Rodriguez if (rule_idx != num_rules) { 8249c96477dSLuis R. Rodriguez kfree(rd); 8259c96477dSLuis R. Rodriguez return NULL; 8269c96477dSLuis R. Rodriguez } 8279c96477dSLuis R. Rodriguez 8289c96477dSLuis R. Rodriguez rd->n_reg_rules = num_rules; 8299c96477dSLuis R. Rodriguez rd->alpha2[0] = '9'; 8309c96477dSLuis R. Rodriguez rd->alpha2[1] = '8'; 8319c96477dSLuis R. Rodriguez 8329c96477dSLuis R. Rodriguez return rd; 8339c96477dSLuis R. Rodriguez } 8349c96477dSLuis R. Rodriguez 835fb1fc7adSLuis R. Rodriguez /* 836fb1fc7adSLuis R. Rodriguez * XXX: add support for the rest of enum nl80211_reg_rule_flags, we may 837fb1fc7adSLuis R. Rodriguez * want to just have the channel structure use these 838fb1fc7adSLuis R. Rodriguez */ 839b2e1b302SLuis R. Rodriguez static u32 map_regdom_flags(u32 rd_flags) 840b2e1b302SLuis R. Rodriguez { 841b2e1b302SLuis R. Rodriguez u32 channel_flags = 0; 842b2e1b302SLuis R. Rodriguez if (rd_flags & NL80211_RRF_PASSIVE_SCAN) 843b2e1b302SLuis R. Rodriguez channel_flags |= IEEE80211_CHAN_PASSIVE_SCAN; 844b2e1b302SLuis R. Rodriguez if (rd_flags & NL80211_RRF_NO_IBSS) 845b2e1b302SLuis R. Rodriguez channel_flags |= IEEE80211_CHAN_NO_IBSS; 846b2e1b302SLuis R. Rodriguez if (rd_flags & NL80211_RRF_DFS) 847b2e1b302SLuis R. Rodriguez channel_flags |= IEEE80211_CHAN_RADAR; 848b2e1b302SLuis R. Rodriguez return channel_flags; 849b2e1b302SLuis R. Rodriguez } 850b2e1b302SLuis R. Rodriguez 8511fa25e41SLuis R. Rodriguez static int freq_reg_info_regd(struct wiphy *wiphy, 8521fa25e41SLuis R. Rodriguez u32 center_freq, 853038659e7SLuis R. Rodriguez u32 desired_bw_khz, 8541fa25e41SLuis R. Rodriguez const struct ieee80211_reg_rule **reg_rule, 8551fa25e41SLuis R. Rodriguez const struct ieee80211_regdomain *custom_regd) 8568318d78aSJohannes Berg { 8578318d78aSJohannes Berg int i; 8580c7dc45dSLuis R. Rodriguez bool band_rule_found = false; 8593e0c3ff3SLuis R. Rodriguez const struct ieee80211_regdomain *regd; 860038659e7SLuis R. Rodriguez bool bw_fits = false; 861038659e7SLuis R. Rodriguez 862038659e7SLuis R. Rodriguez if (!desired_bw_khz) 863038659e7SLuis R. Rodriguez desired_bw_khz = MHZ_TO_KHZ(20); 8648318d78aSJohannes Berg 8651fa25e41SLuis R. Rodriguez regd = custom_regd ? custom_regd : cfg80211_regdomain; 8663e0c3ff3SLuis R. Rodriguez 867fb1fc7adSLuis R. Rodriguez /* 868fb1fc7adSLuis R. Rodriguez * Follow the driver's regulatory domain, if present, unless a country 869fb1fc7adSLuis R. Rodriguez * IE has been processed or a user wants to help complaince further 870fb1fc7adSLuis R. Rodriguez */ 8717db90f4aSLuis R. Rodriguez if (last_request->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && 8727db90f4aSLuis R. Rodriguez last_request->initiator != NL80211_REGDOM_SET_BY_USER && 8733e0c3ff3SLuis R. Rodriguez wiphy->regd) 8743e0c3ff3SLuis R. Rodriguez regd = wiphy->regd; 8753e0c3ff3SLuis R. Rodriguez 8763e0c3ff3SLuis R. Rodriguez if (!regd) 877b2e1b302SLuis R. Rodriguez return -EINVAL; 878b2e1b302SLuis R. Rodriguez 8793e0c3ff3SLuis R. Rodriguez for (i = 0; i < regd->n_reg_rules; i++) { 880b2e1b302SLuis R. Rodriguez const struct ieee80211_reg_rule *rr; 881b2e1b302SLuis R. Rodriguez const struct ieee80211_freq_range *fr = NULL; 882b2e1b302SLuis R. Rodriguez const struct ieee80211_power_rule *pr = NULL; 883b2e1b302SLuis R. Rodriguez 8843e0c3ff3SLuis R. Rodriguez rr = ®d->reg_rules[i]; 885b2e1b302SLuis R. Rodriguez fr = &rr->freq_range; 886b2e1b302SLuis R. Rodriguez pr = &rr->power_rule; 8870c7dc45dSLuis R. Rodriguez 888fb1fc7adSLuis R. Rodriguez /* 889fb1fc7adSLuis R. Rodriguez * We only need to know if one frequency rule was 8900c7dc45dSLuis R. Rodriguez * was in center_freq's band, that's enough, so lets 891fb1fc7adSLuis R. Rodriguez * not overwrite it once found 892fb1fc7adSLuis R. Rodriguez */ 8930c7dc45dSLuis R. Rodriguez if (!band_rule_found) 8940c7dc45dSLuis R. Rodriguez band_rule_found = freq_in_rule_band(fr, center_freq); 8950c7dc45dSLuis R. Rodriguez 896038659e7SLuis R. Rodriguez bw_fits = reg_does_bw_fit(fr, 897038659e7SLuis R. Rodriguez center_freq, 898038659e7SLuis R. Rodriguez desired_bw_khz); 8990c7dc45dSLuis R. Rodriguez 900038659e7SLuis R. Rodriguez if (band_rule_found && bw_fits) { 901b2e1b302SLuis R. Rodriguez *reg_rule = rr; 902038659e7SLuis R. Rodriguez return 0; 9038318d78aSJohannes Berg } 9048318d78aSJohannes Berg } 9058318d78aSJohannes Berg 9060c7dc45dSLuis R. Rodriguez if (!band_rule_found) 9070c7dc45dSLuis R. Rodriguez return -ERANGE; 9080c7dc45dSLuis R. Rodriguez 909038659e7SLuis R. Rodriguez return -EINVAL; 910b2e1b302SLuis R. Rodriguez } 91134f57347SLuis R. Rodriguez EXPORT_SYMBOL(freq_reg_info); 912b2e1b302SLuis R. Rodriguez 913038659e7SLuis R. Rodriguez int freq_reg_info(struct wiphy *wiphy, 914038659e7SLuis R. Rodriguez u32 center_freq, 915038659e7SLuis R. Rodriguez u32 desired_bw_khz, 9161fa25e41SLuis R. Rodriguez const struct ieee80211_reg_rule **reg_rule) 9171fa25e41SLuis R. Rodriguez { 918ac46d48eSLuis R. Rodriguez assert_cfg80211_lock(); 919038659e7SLuis R. Rodriguez return freq_reg_info_regd(wiphy, 920038659e7SLuis R. Rodriguez center_freq, 921038659e7SLuis R. Rodriguez desired_bw_khz, 922038659e7SLuis R. Rodriguez reg_rule, 923038659e7SLuis R. Rodriguez NULL); 9241fa25e41SLuis R. Rodriguez } 925b2e1b302SLuis R. Rodriguez 926038659e7SLuis R. Rodriguez /* 927038659e7SLuis R. Rodriguez * Note that right now we assume the desired channel bandwidth 928038659e7SLuis R. Rodriguez * is always 20 MHz for each individual channel (HT40 uses 20 MHz 929038659e7SLuis R. Rodriguez * per channel, the primary and the extension channel). To support 930038659e7SLuis R. Rodriguez * smaller custom bandwidths such as 5 MHz or 10 MHz we'll need a 931038659e7SLuis R. Rodriguez * new ieee80211_channel.target_bw and re run the regulatory check 932038659e7SLuis R. Rodriguez * on the wiphy with the target_bw specified. Then we can simply use 933038659e7SLuis R. Rodriguez * that below for the desired_bw_khz below. 934038659e7SLuis R. Rodriguez */ 935a92a3ce7SLuis R. Rodriguez static void handle_channel(struct wiphy *wiphy, enum ieee80211_band band, 936a92a3ce7SLuis R. Rodriguez unsigned int chan_idx) 937b2e1b302SLuis R. Rodriguez { 938b2e1b302SLuis R. Rodriguez int r; 939038659e7SLuis R. Rodriguez u32 flags, bw_flags = 0; 940038659e7SLuis R. Rodriguez u32 desired_bw_khz = MHZ_TO_KHZ(20); 941b2e1b302SLuis R. Rodriguez const struct ieee80211_reg_rule *reg_rule = NULL; 942b2e1b302SLuis R. Rodriguez const struct ieee80211_power_rule *power_rule = NULL; 943038659e7SLuis R. Rodriguez const struct ieee80211_freq_range *freq_range = NULL; 944a92a3ce7SLuis R. Rodriguez struct ieee80211_supported_band *sband; 945a92a3ce7SLuis R. Rodriguez struct ieee80211_channel *chan; 946fe33eb39SLuis R. Rodriguez struct wiphy *request_wiphy = NULL; 947a92a3ce7SLuis R. Rodriguez 948761cf7ecSLuis R. Rodriguez assert_cfg80211_lock(); 949761cf7ecSLuis R. Rodriguez 950806a9e39SLuis R. Rodriguez request_wiphy = wiphy_idx_to_wiphy(last_request->wiphy_idx); 951806a9e39SLuis R. Rodriguez 952a92a3ce7SLuis R. Rodriguez sband = wiphy->bands[band]; 953a92a3ce7SLuis R. Rodriguez BUG_ON(chan_idx >= sband->n_channels); 954a92a3ce7SLuis R. Rodriguez chan = &sband->channels[chan_idx]; 955a92a3ce7SLuis R. Rodriguez 956a92a3ce7SLuis R. Rodriguez flags = chan->orig_flags; 957b2e1b302SLuis R. Rodriguez 958038659e7SLuis R. Rodriguez r = freq_reg_info(wiphy, 959038659e7SLuis R. Rodriguez MHZ_TO_KHZ(chan->center_freq), 960038659e7SLuis R. Rodriguez desired_bw_khz, 961038659e7SLuis R. Rodriguez ®_rule); 962b2e1b302SLuis R. Rodriguez 963b2e1b302SLuis R. Rodriguez if (r) { 964fb1fc7adSLuis R. Rodriguez /* 965fb1fc7adSLuis R. Rodriguez * This means no regulatory rule was found in the country IE 9660c7dc45dSLuis R. Rodriguez * with a frequency range on the center_freq's band, since 9670c7dc45dSLuis R. Rodriguez * IEEE-802.11 allows for a country IE to have a subset of the 9680c7dc45dSLuis R. Rodriguez * regulatory information provided in a country we ignore 9690c7dc45dSLuis R. Rodriguez * disabling the channel unless at least one reg rule was 9700c7dc45dSLuis R. Rodriguez * found on the center_freq's band. For details see this 9710c7dc45dSLuis R. Rodriguez * clarification: 9720c7dc45dSLuis R. Rodriguez * 9730c7dc45dSLuis R. Rodriguez * http://tinyurl.com/11d-clarification 9740c7dc45dSLuis R. Rodriguez */ 9750c7dc45dSLuis R. Rodriguez if (r == -ERANGE && 9767db90f4aSLuis R. Rodriguez last_request->initiator == 9777db90f4aSLuis R. Rodriguez NL80211_REGDOM_SET_BY_COUNTRY_IE) { 9780c7dc45dSLuis R. Rodriguez #ifdef CONFIG_CFG80211_REG_DEBUG 9790c7dc45dSLuis R. Rodriguez printk(KERN_DEBUG "cfg80211: Leaving channel %d MHz " 9800c7dc45dSLuis R. Rodriguez "intact on %s - no rule found in band on " 9810c7dc45dSLuis R. Rodriguez "Country IE\n", 9820c7dc45dSLuis R. Rodriguez chan->center_freq, wiphy_name(wiphy)); 9830c7dc45dSLuis R. Rodriguez #endif 9840c7dc45dSLuis R. Rodriguez } else { 985fb1fc7adSLuis R. Rodriguez /* 986fb1fc7adSLuis R. Rodriguez * In this case we know the country IE has at least one reg rule 987fb1fc7adSLuis R. Rodriguez * for the band so we respect its band definitions 988fb1fc7adSLuis R. Rodriguez */ 9890c7dc45dSLuis R. Rodriguez #ifdef CONFIG_CFG80211_REG_DEBUG 9907db90f4aSLuis R. Rodriguez if (last_request->initiator == 9917db90f4aSLuis R. Rodriguez NL80211_REGDOM_SET_BY_COUNTRY_IE) 9920c7dc45dSLuis R. Rodriguez printk(KERN_DEBUG "cfg80211: Disabling " 9930c7dc45dSLuis R. Rodriguez "channel %d MHz on %s due to " 9940c7dc45dSLuis R. Rodriguez "Country IE\n", 9950c7dc45dSLuis R. Rodriguez chan->center_freq, wiphy_name(wiphy)); 9960c7dc45dSLuis R. Rodriguez #endif 9978318d78aSJohannes Berg flags |= IEEE80211_CHAN_DISABLED; 9988318d78aSJohannes Berg chan->flags = flags; 9990c7dc45dSLuis R. Rodriguez } 10008318d78aSJohannes Berg return; 10018318d78aSJohannes Berg } 10028318d78aSJohannes Berg 1003b2e1b302SLuis R. Rodriguez power_rule = ®_rule->power_rule; 1004038659e7SLuis R. Rodriguez freq_range = ®_rule->freq_range; 1005038659e7SLuis R. Rodriguez 1006038659e7SLuis R. Rodriguez if (freq_range->max_bandwidth_khz < MHZ_TO_KHZ(40)) 1007038659e7SLuis R. Rodriguez bw_flags = IEEE80211_CHAN_NO_HT40; 1008b2e1b302SLuis R. Rodriguez 10097db90f4aSLuis R. Rodriguez if (last_request->initiator == NL80211_REGDOM_SET_BY_DRIVER && 1010806a9e39SLuis R. Rodriguez request_wiphy && request_wiphy == wiphy && 1011806a9e39SLuis R. Rodriguez request_wiphy->strict_regulatory) { 1012fb1fc7adSLuis R. Rodriguez /* 1013fb1fc7adSLuis R. Rodriguez * This gaurantees the driver's requested regulatory domain 1014f976376dSLuis R. Rodriguez * will always be used as a base for further regulatory 1015fb1fc7adSLuis R. Rodriguez * settings 1016fb1fc7adSLuis R. Rodriguez */ 1017f976376dSLuis R. Rodriguez chan->flags = chan->orig_flags = 1018038659e7SLuis R. Rodriguez map_regdom_flags(reg_rule->flags) | bw_flags; 1019f976376dSLuis R. Rodriguez chan->max_antenna_gain = chan->orig_mag = 1020f976376dSLuis R. Rodriguez (int) MBI_TO_DBI(power_rule->max_antenna_gain); 1021f976376dSLuis R. Rodriguez chan->max_power = chan->orig_mpwr = 1022f976376dSLuis R. Rodriguez (int) MBM_TO_DBM(power_rule->max_eirp); 1023f976376dSLuis R. Rodriguez return; 1024f976376dSLuis R. Rodriguez } 1025f976376dSLuis R. Rodriguez 1026038659e7SLuis R. Rodriguez chan->flags = flags | bw_flags | map_regdom_flags(reg_rule->flags); 10278318d78aSJohannes Berg chan->max_antenna_gain = min(chan->orig_mag, 1028b2e1b302SLuis R. Rodriguez (int) MBI_TO_DBI(power_rule->max_antenna_gain)); 1029253898c4SJohn W. Linville if (chan->orig_mpwr) 1030b2e1b302SLuis R. Rodriguez chan->max_power = min(chan->orig_mpwr, 1031b2e1b302SLuis R. Rodriguez (int) MBM_TO_DBM(power_rule->max_eirp)); 1032253898c4SJohn W. Linville else 1033b2e1b302SLuis R. Rodriguez chan->max_power = (int) MBM_TO_DBM(power_rule->max_eirp); 10348318d78aSJohannes Berg } 10358318d78aSJohannes Berg 1036a92a3ce7SLuis R. Rodriguez static void handle_band(struct wiphy *wiphy, enum ieee80211_band band) 10378318d78aSJohannes Berg { 1038a92a3ce7SLuis R. Rodriguez unsigned int i; 1039a92a3ce7SLuis R. Rodriguez struct ieee80211_supported_band *sband; 1040a92a3ce7SLuis R. Rodriguez 1041a92a3ce7SLuis R. Rodriguez BUG_ON(!wiphy->bands[band]); 1042a92a3ce7SLuis R. Rodriguez sband = wiphy->bands[band]; 10438318d78aSJohannes Berg 10448318d78aSJohannes Berg for (i = 0; i < sband->n_channels; i++) 1045a92a3ce7SLuis R. Rodriguez handle_channel(wiphy, band, i); 10468318d78aSJohannes Berg } 10478318d78aSJohannes Berg 10487db90f4aSLuis R. Rodriguez static bool ignore_reg_update(struct wiphy *wiphy, 10497db90f4aSLuis R. Rodriguez enum nl80211_reg_initiator initiator) 105014b9815aSLuis R. Rodriguez { 105114b9815aSLuis R. Rodriguez if (!last_request) 105214b9815aSLuis R. Rodriguez return true; 10537db90f4aSLuis R. Rodriguez if (initiator == NL80211_REGDOM_SET_BY_CORE && 10542a44f911SLuis R. Rodriguez wiphy->custom_regulatory) 105514b9815aSLuis R. Rodriguez return true; 1056fb1fc7adSLuis R. Rodriguez /* 1057fb1fc7adSLuis R. Rodriguez * wiphy->regd will be set once the device has its own 1058fb1fc7adSLuis R. Rodriguez * desired regulatory domain set 1059fb1fc7adSLuis R. Rodriguez */ 1060f976376dSLuis R. Rodriguez if (wiphy->strict_regulatory && !wiphy->regd && 1061f976376dSLuis R. Rodriguez !is_world_regdom(last_request->alpha2)) 106214b9815aSLuis R. Rodriguez return true; 106314b9815aSLuis R. Rodriguez return false; 106414b9815aSLuis R. Rodriguez } 106514b9815aSLuis R. Rodriguez 10667db90f4aSLuis R. Rodriguez static void update_all_wiphy_regulatory(enum nl80211_reg_initiator initiator) 1067b2e1b302SLuis R. Rodriguez { 106879c97e97SJohannes Berg struct cfg80211_registered_device *rdev; 1069b2e1b302SLuis R. Rodriguez 107079c97e97SJohannes Berg list_for_each_entry(rdev, &cfg80211_rdev_list, list) 107179c97e97SJohannes Berg wiphy_update_regulatory(&rdev->wiphy, initiator); 1072b2e1b302SLuis R. Rodriguez } 1073b2e1b302SLuis R. Rodriguez 1074e38f8a7aSLuis R. Rodriguez static void handle_reg_beacon(struct wiphy *wiphy, 1075e38f8a7aSLuis R. Rodriguez unsigned int chan_idx, 1076e38f8a7aSLuis R. Rodriguez struct reg_beacon *reg_beacon) 1077e38f8a7aSLuis R. Rodriguez { 1078e38f8a7aSLuis R. Rodriguez struct ieee80211_supported_band *sband; 1079e38f8a7aSLuis R. Rodriguez struct ieee80211_channel *chan; 10806bad8766SLuis R. Rodriguez bool channel_changed = false; 10816bad8766SLuis R. Rodriguez struct ieee80211_channel chan_before; 1082e38f8a7aSLuis R. Rodriguez 1083e38f8a7aSLuis R. Rodriguez assert_cfg80211_lock(); 1084e38f8a7aSLuis R. Rodriguez 1085e38f8a7aSLuis R. Rodriguez sband = wiphy->bands[reg_beacon->chan.band]; 1086e38f8a7aSLuis R. Rodriguez chan = &sband->channels[chan_idx]; 1087e38f8a7aSLuis R. Rodriguez 1088e38f8a7aSLuis R. Rodriguez if (likely(chan->center_freq != reg_beacon->chan.center_freq)) 1089e38f8a7aSLuis R. Rodriguez return; 1090e38f8a7aSLuis R. Rodriguez 10916bad8766SLuis R. Rodriguez if (chan->beacon_found) 10926bad8766SLuis R. Rodriguez return; 10936bad8766SLuis R. Rodriguez 10946bad8766SLuis R. Rodriguez chan->beacon_found = true; 10956bad8766SLuis R. Rodriguez 109637184244SLuis R. Rodriguez if (wiphy->disable_beacon_hints) 109737184244SLuis R. Rodriguez return; 109837184244SLuis R. Rodriguez 10996bad8766SLuis R. Rodriguez chan_before.center_freq = chan->center_freq; 11006bad8766SLuis R. Rodriguez chan_before.flags = chan->flags; 11016bad8766SLuis R. Rodriguez 110237184244SLuis R. Rodriguez if (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN) { 1103e38f8a7aSLuis R. Rodriguez chan->flags &= ~IEEE80211_CHAN_PASSIVE_SCAN; 11046bad8766SLuis R. Rodriguez channel_changed = true; 1105e38f8a7aSLuis R. Rodriguez } 1106e38f8a7aSLuis R. Rodriguez 110737184244SLuis R. Rodriguez if (chan->flags & IEEE80211_CHAN_NO_IBSS) { 1108e38f8a7aSLuis R. Rodriguez chan->flags &= ~IEEE80211_CHAN_NO_IBSS; 11096bad8766SLuis R. Rodriguez channel_changed = true; 1110e38f8a7aSLuis R. Rodriguez } 1111e38f8a7aSLuis R. Rodriguez 11126bad8766SLuis R. Rodriguez if (channel_changed) 11136bad8766SLuis R. Rodriguez nl80211_send_beacon_hint_event(wiphy, &chan_before, chan); 1114e38f8a7aSLuis R. Rodriguez } 1115e38f8a7aSLuis R. Rodriguez 1116e38f8a7aSLuis R. Rodriguez /* 1117e38f8a7aSLuis R. Rodriguez * Called when a scan on a wiphy finds a beacon on 1118e38f8a7aSLuis R. Rodriguez * new channel 1119e38f8a7aSLuis R. Rodriguez */ 1120e38f8a7aSLuis R. Rodriguez static void wiphy_update_new_beacon(struct wiphy *wiphy, 1121e38f8a7aSLuis R. Rodriguez struct reg_beacon *reg_beacon) 1122e38f8a7aSLuis R. Rodriguez { 1123e38f8a7aSLuis R. Rodriguez unsigned int i; 1124e38f8a7aSLuis R. Rodriguez struct ieee80211_supported_band *sband; 1125e38f8a7aSLuis R. Rodriguez 1126e38f8a7aSLuis R. Rodriguez assert_cfg80211_lock(); 1127e38f8a7aSLuis R. Rodriguez 1128e38f8a7aSLuis R. Rodriguez if (!wiphy->bands[reg_beacon->chan.band]) 1129e38f8a7aSLuis R. Rodriguez return; 1130e38f8a7aSLuis R. Rodriguez 1131e38f8a7aSLuis R. Rodriguez sband = wiphy->bands[reg_beacon->chan.band]; 1132e38f8a7aSLuis R. Rodriguez 1133e38f8a7aSLuis R. Rodriguez for (i = 0; i < sband->n_channels; i++) 1134e38f8a7aSLuis R. Rodriguez handle_reg_beacon(wiphy, i, reg_beacon); 1135e38f8a7aSLuis R. Rodriguez } 1136e38f8a7aSLuis R. Rodriguez 1137e38f8a7aSLuis R. Rodriguez /* 1138e38f8a7aSLuis R. Rodriguez * Called upon reg changes or a new wiphy is added 1139e38f8a7aSLuis R. Rodriguez */ 1140e38f8a7aSLuis R. Rodriguez static void wiphy_update_beacon_reg(struct wiphy *wiphy) 1141e38f8a7aSLuis R. Rodriguez { 1142e38f8a7aSLuis R. Rodriguez unsigned int i; 1143e38f8a7aSLuis R. Rodriguez struct ieee80211_supported_band *sband; 1144e38f8a7aSLuis R. Rodriguez struct reg_beacon *reg_beacon; 1145e38f8a7aSLuis R. Rodriguez 1146e38f8a7aSLuis R. Rodriguez assert_cfg80211_lock(); 1147e38f8a7aSLuis R. Rodriguez 1148e38f8a7aSLuis R. Rodriguez if (list_empty(®_beacon_list)) 1149e38f8a7aSLuis R. Rodriguez return; 1150e38f8a7aSLuis R. Rodriguez 1151e38f8a7aSLuis R. Rodriguez list_for_each_entry(reg_beacon, ®_beacon_list, list) { 1152e38f8a7aSLuis R. Rodriguez if (!wiphy->bands[reg_beacon->chan.band]) 1153e38f8a7aSLuis R. Rodriguez continue; 1154e38f8a7aSLuis R. Rodriguez sband = wiphy->bands[reg_beacon->chan.band]; 1155e38f8a7aSLuis R. Rodriguez for (i = 0; i < sband->n_channels; i++) 1156e38f8a7aSLuis R. Rodriguez handle_reg_beacon(wiphy, i, reg_beacon); 1157e38f8a7aSLuis R. Rodriguez } 1158e38f8a7aSLuis R. Rodriguez } 1159e38f8a7aSLuis R. Rodriguez 1160e38f8a7aSLuis R. Rodriguez static bool reg_is_world_roaming(struct wiphy *wiphy) 1161e38f8a7aSLuis R. Rodriguez { 1162e38f8a7aSLuis R. Rodriguez if (is_world_regdom(cfg80211_regdomain->alpha2) || 1163e38f8a7aSLuis R. Rodriguez (wiphy->regd && is_world_regdom(wiphy->regd->alpha2))) 1164e38f8a7aSLuis R. Rodriguez return true; 1165b1ed8dddSLuis R. Rodriguez if (last_request && 1166b1ed8dddSLuis R. Rodriguez last_request->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && 1167e38f8a7aSLuis R. Rodriguez wiphy->custom_regulatory) 1168e38f8a7aSLuis R. Rodriguez return true; 1169e38f8a7aSLuis R. Rodriguez return false; 1170e38f8a7aSLuis R. Rodriguez } 1171e38f8a7aSLuis R. Rodriguez 1172e38f8a7aSLuis R. Rodriguez /* Reap the advantages of previously found beacons */ 1173e38f8a7aSLuis R. Rodriguez static void reg_process_beacons(struct wiphy *wiphy) 1174e38f8a7aSLuis R. Rodriguez { 1175b1ed8dddSLuis R. Rodriguez /* 1176b1ed8dddSLuis R. Rodriguez * Means we are just firing up cfg80211, so no beacons would 1177b1ed8dddSLuis R. Rodriguez * have been processed yet. 1178b1ed8dddSLuis R. Rodriguez */ 1179b1ed8dddSLuis R. Rodriguez if (!last_request) 1180b1ed8dddSLuis R. Rodriguez return; 1181e38f8a7aSLuis R. Rodriguez if (!reg_is_world_roaming(wiphy)) 1182e38f8a7aSLuis R. Rodriguez return; 1183e38f8a7aSLuis R. Rodriguez wiphy_update_beacon_reg(wiphy); 1184e38f8a7aSLuis R. Rodriguez } 1185e38f8a7aSLuis R. Rodriguez 1186038659e7SLuis R. Rodriguez static bool is_ht40_not_allowed(struct ieee80211_channel *chan) 1187038659e7SLuis R. Rodriguez { 1188038659e7SLuis R. Rodriguez if (!chan) 1189038659e7SLuis R. Rodriguez return true; 1190038659e7SLuis R. Rodriguez if (chan->flags & IEEE80211_CHAN_DISABLED) 1191038659e7SLuis R. Rodriguez return true; 1192038659e7SLuis R. Rodriguez /* This would happen when regulatory rules disallow HT40 completely */ 1193038659e7SLuis R. Rodriguez if (IEEE80211_CHAN_NO_HT40 == (chan->flags & (IEEE80211_CHAN_NO_HT40))) 1194038659e7SLuis R. Rodriguez return true; 1195038659e7SLuis R. Rodriguez return false; 1196038659e7SLuis R. Rodriguez } 1197038659e7SLuis R. Rodriguez 1198038659e7SLuis R. Rodriguez static void reg_process_ht_flags_channel(struct wiphy *wiphy, 1199038659e7SLuis R. Rodriguez enum ieee80211_band band, 1200038659e7SLuis R. Rodriguez unsigned int chan_idx) 1201038659e7SLuis R. Rodriguez { 1202038659e7SLuis R. Rodriguez struct ieee80211_supported_band *sband; 1203038659e7SLuis R. Rodriguez struct ieee80211_channel *channel; 1204038659e7SLuis R. Rodriguez struct ieee80211_channel *channel_before = NULL, *channel_after = NULL; 1205038659e7SLuis R. Rodriguez unsigned int i; 1206038659e7SLuis R. Rodriguez 1207038659e7SLuis R. Rodriguez assert_cfg80211_lock(); 1208038659e7SLuis R. Rodriguez 1209038659e7SLuis R. Rodriguez sband = wiphy->bands[band]; 1210038659e7SLuis R. Rodriguez BUG_ON(chan_idx >= sband->n_channels); 1211038659e7SLuis R. Rodriguez channel = &sband->channels[chan_idx]; 1212038659e7SLuis R. Rodriguez 1213038659e7SLuis R. Rodriguez if (is_ht40_not_allowed(channel)) { 1214038659e7SLuis R. Rodriguez channel->flags |= IEEE80211_CHAN_NO_HT40; 1215038659e7SLuis R. Rodriguez return; 1216038659e7SLuis R. Rodriguez } 1217038659e7SLuis R. Rodriguez 1218038659e7SLuis R. Rodriguez /* 1219038659e7SLuis R. Rodriguez * We need to ensure the extension channels exist to 1220038659e7SLuis R. Rodriguez * be able to use HT40- or HT40+, this finds them (or not) 1221038659e7SLuis R. Rodriguez */ 1222038659e7SLuis R. Rodriguez for (i = 0; i < sband->n_channels; i++) { 1223038659e7SLuis R. Rodriguez struct ieee80211_channel *c = &sband->channels[i]; 1224038659e7SLuis R. Rodriguez if (c->center_freq == (channel->center_freq - 20)) 1225038659e7SLuis R. Rodriguez channel_before = c; 1226038659e7SLuis R. Rodriguez if (c->center_freq == (channel->center_freq + 20)) 1227038659e7SLuis R. Rodriguez channel_after = c; 1228038659e7SLuis R. Rodriguez } 1229038659e7SLuis R. Rodriguez 1230038659e7SLuis R. Rodriguez /* 1231038659e7SLuis R. Rodriguez * Please note that this assumes target bandwidth is 20 MHz, 1232038659e7SLuis R. Rodriguez * if that ever changes we also need to change the below logic 1233038659e7SLuis R. Rodriguez * to include that as well. 1234038659e7SLuis R. Rodriguez */ 1235038659e7SLuis R. Rodriguez if (is_ht40_not_allowed(channel_before)) 1236689da1b3SLuis R. Rodriguez channel->flags |= IEEE80211_CHAN_NO_HT40MINUS; 1237038659e7SLuis R. Rodriguez else 1238689da1b3SLuis R. Rodriguez channel->flags &= ~IEEE80211_CHAN_NO_HT40MINUS; 1239038659e7SLuis R. Rodriguez 1240038659e7SLuis R. Rodriguez if (is_ht40_not_allowed(channel_after)) 1241689da1b3SLuis R. Rodriguez channel->flags |= IEEE80211_CHAN_NO_HT40PLUS; 1242038659e7SLuis R. Rodriguez else 1243689da1b3SLuis R. Rodriguez channel->flags &= ~IEEE80211_CHAN_NO_HT40PLUS; 1244038659e7SLuis R. Rodriguez } 1245038659e7SLuis R. Rodriguez 1246038659e7SLuis R. Rodriguez static void reg_process_ht_flags_band(struct wiphy *wiphy, 1247038659e7SLuis R. Rodriguez enum ieee80211_band band) 1248038659e7SLuis R. Rodriguez { 1249038659e7SLuis R. Rodriguez unsigned int i; 1250038659e7SLuis R. Rodriguez struct ieee80211_supported_band *sband; 1251038659e7SLuis R. Rodriguez 1252038659e7SLuis R. Rodriguez BUG_ON(!wiphy->bands[band]); 1253038659e7SLuis R. Rodriguez sband = wiphy->bands[band]; 1254038659e7SLuis R. Rodriguez 1255038659e7SLuis R. Rodriguez for (i = 0; i < sband->n_channels; i++) 1256038659e7SLuis R. Rodriguez reg_process_ht_flags_channel(wiphy, band, i); 1257038659e7SLuis R. Rodriguez } 1258038659e7SLuis R. Rodriguez 1259038659e7SLuis R. Rodriguez static void reg_process_ht_flags(struct wiphy *wiphy) 1260038659e7SLuis R. Rodriguez { 1261038659e7SLuis R. Rodriguez enum ieee80211_band band; 1262038659e7SLuis R. Rodriguez 1263038659e7SLuis R. Rodriguez if (!wiphy) 1264038659e7SLuis R. Rodriguez return; 1265038659e7SLuis R. Rodriguez 1266038659e7SLuis R. Rodriguez for (band = 0; band < IEEE80211_NUM_BANDS; band++) { 1267038659e7SLuis R. Rodriguez if (wiphy->bands[band]) 1268038659e7SLuis R. Rodriguez reg_process_ht_flags_band(wiphy, band); 1269038659e7SLuis R. Rodriguez } 1270038659e7SLuis R. Rodriguez 1271038659e7SLuis R. Rodriguez } 1272038659e7SLuis R. Rodriguez 12737db90f4aSLuis R. Rodriguez void wiphy_update_regulatory(struct wiphy *wiphy, 12747db90f4aSLuis R. Rodriguez enum nl80211_reg_initiator initiator) 12758318d78aSJohannes Berg { 12768318d78aSJohannes Berg enum ieee80211_band band; 1277d46e5b1dSLuis R. Rodriguez 12787db90f4aSLuis R. Rodriguez if (ignore_reg_update(wiphy, initiator)) 1279e38f8a7aSLuis R. Rodriguez goto out; 1280b2e1b302SLuis R. Rodriguez for (band = 0; band < IEEE80211_NUM_BANDS; band++) { 12818318d78aSJohannes Berg if (wiphy->bands[band]) 1282a92a3ce7SLuis R. Rodriguez handle_band(wiphy, band); 1283b2e1b302SLuis R. Rodriguez } 1284e38f8a7aSLuis R. Rodriguez out: 1285e38f8a7aSLuis R. Rodriguez reg_process_beacons(wiphy); 1286038659e7SLuis R. Rodriguez reg_process_ht_flags(wiphy); 1287b2e1b302SLuis R. Rodriguez if (wiphy->reg_notifier) 1288716f9392SLuis R. Rodriguez wiphy->reg_notifier(wiphy, last_request); 1289b2e1b302SLuis R. Rodriguez } 1290b2e1b302SLuis R. Rodriguez 12911fa25e41SLuis R. Rodriguez static void handle_channel_custom(struct wiphy *wiphy, 12921fa25e41SLuis R. Rodriguez enum ieee80211_band band, 12931fa25e41SLuis R. Rodriguez unsigned int chan_idx, 12941fa25e41SLuis R. Rodriguez const struct ieee80211_regdomain *regd) 12951fa25e41SLuis R. Rodriguez { 12961fa25e41SLuis R. Rodriguez int r; 1297038659e7SLuis R. Rodriguez u32 desired_bw_khz = MHZ_TO_KHZ(20); 1298038659e7SLuis R. Rodriguez u32 bw_flags = 0; 12991fa25e41SLuis R. Rodriguez const struct ieee80211_reg_rule *reg_rule = NULL; 13001fa25e41SLuis R. Rodriguez const struct ieee80211_power_rule *power_rule = NULL; 1301038659e7SLuis R. Rodriguez const struct ieee80211_freq_range *freq_range = NULL; 13021fa25e41SLuis R. Rodriguez struct ieee80211_supported_band *sband; 13031fa25e41SLuis R. Rodriguez struct ieee80211_channel *chan; 13041fa25e41SLuis R. Rodriguez 1305abc7381bSLuis R. Rodriguez assert_reg_lock(); 1306ac46d48eSLuis R. Rodriguez 13071fa25e41SLuis R. Rodriguez sband = wiphy->bands[band]; 13081fa25e41SLuis R. Rodriguez BUG_ON(chan_idx >= sband->n_channels); 13091fa25e41SLuis R. Rodriguez chan = &sband->channels[chan_idx]; 13101fa25e41SLuis R. Rodriguez 1311038659e7SLuis R. Rodriguez r = freq_reg_info_regd(wiphy, 1312038659e7SLuis R. Rodriguez MHZ_TO_KHZ(chan->center_freq), 1313038659e7SLuis R. Rodriguez desired_bw_khz, 1314038659e7SLuis R. Rodriguez ®_rule, 1315038659e7SLuis R. Rodriguez regd); 13161fa25e41SLuis R. Rodriguez 13171fa25e41SLuis R. Rodriguez if (r) { 13181fa25e41SLuis R. Rodriguez chan->flags = IEEE80211_CHAN_DISABLED; 13191fa25e41SLuis R. Rodriguez return; 13201fa25e41SLuis R. Rodriguez } 13211fa25e41SLuis R. Rodriguez 13221fa25e41SLuis R. Rodriguez power_rule = ®_rule->power_rule; 1323038659e7SLuis R. Rodriguez freq_range = ®_rule->freq_range; 13241fa25e41SLuis R. Rodriguez 1325038659e7SLuis R. Rodriguez if (freq_range->max_bandwidth_khz < MHZ_TO_KHZ(40)) 1326038659e7SLuis R. Rodriguez bw_flags = IEEE80211_CHAN_NO_HT40; 1327038659e7SLuis R. Rodriguez 1328038659e7SLuis R. Rodriguez chan->flags |= map_regdom_flags(reg_rule->flags) | bw_flags; 13291fa25e41SLuis R. Rodriguez chan->max_antenna_gain = (int) MBI_TO_DBI(power_rule->max_antenna_gain); 13301fa25e41SLuis R. Rodriguez chan->max_power = (int) MBM_TO_DBM(power_rule->max_eirp); 13311fa25e41SLuis R. Rodriguez } 13321fa25e41SLuis R. Rodriguez 13331fa25e41SLuis R. Rodriguez static void handle_band_custom(struct wiphy *wiphy, enum ieee80211_band band, 13341fa25e41SLuis R. Rodriguez const struct ieee80211_regdomain *regd) 13351fa25e41SLuis R. Rodriguez { 13361fa25e41SLuis R. Rodriguez unsigned int i; 13371fa25e41SLuis R. Rodriguez struct ieee80211_supported_band *sband; 13381fa25e41SLuis R. Rodriguez 13391fa25e41SLuis R. Rodriguez BUG_ON(!wiphy->bands[band]); 13401fa25e41SLuis R. Rodriguez sband = wiphy->bands[band]; 13411fa25e41SLuis R. Rodriguez 13421fa25e41SLuis R. Rodriguez for (i = 0; i < sband->n_channels; i++) 13431fa25e41SLuis R. Rodriguez handle_channel_custom(wiphy, band, i, regd); 13441fa25e41SLuis R. Rodriguez } 13451fa25e41SLuis R. Rodriguez 13461fa25e41SLuis R. Rodriguez /* Used by drivers prior to wiphy registration */ 13471fa25e41SLuis R. Rodriguez void wiphy_apply_custom_regulatory(struct wiphy *wiphy, 13481fa25e41SLuis R. Rodriguez const struct ieee80211_regdomain *regd) 13491fa25e41SLuis R. Rodriguez { 13501fa25e41SLuis R. Rodriguez enum ieee80211_band band; 1351bbcf3f02SLuis R. Rodriguez unsigned int bands_set = 0; 1352ac46d48eSLuis R. Rodriguez 1353abc7381bSLuis R. Rodriguez mutex_lock(®_mutex); 13541fa25e41SLuis R. Rodriguez for (band = 0; band < IEEE80211_NUM_BANDS; band++) { 1355bbcf3f02SLuis R. Rodriguez if (!wiphy->bands[band]) 1356bbcf3f02SLuis R. Rodriguez continue; 13571fa25e41SLuis R. Rodriguez handle_band_custom(wiphy, band, regd); 1358bbcf3f02SLuis R. Rodriguez bands_set++; 13591fa25e41SLuis R. Rodriguez } 1360abc7381bSLuis R. Rodriguez mutex_unlock(®_mutex); 1361bbcf3f02SLuis R. Rodriguez 1362bbcf3f02SLuis R. Rodriguez /* 1363bbcf3f02SLuis R. Rodriguez * no point in calling this if it won't have any effect 1364bbcf3f02SLuis R. Rodriguez * on your device's supportd bands. 1365bbcf3f02SLuis R. Rodriguez */ 1366bbcf3f02SLuis R. Rodriguez WARN_ON(!bands_set); 13671fa25e41SLuis R. Rodriguez } 13681fa25e41SLuis R. Rodriguez EXPORT_SYMBOL(wiphy_apply_custom_regulatory); 13691fa25e41SLuis R. Rodriguez 13703e0c3ff3SLuis R. Rodriguez static int reg_copy_regd(const struct ieee80211_regdomain **dst_regd, 13713e0c3ff3SLuis R. Rodriguez const struct ieee80211_regdomain *src_regd) 13723e0c3ff3SLuis R. Rodriguez { 13733e0c3ff3SLuis R. Rodriguez struct ieee80211_regdomain *regd; 13743e0c3ff3SLuis R. Rodriguez int size_of_regd = 0; 13753e0c3ff3SLuis R. Rodriguez unsigned int i; 13763e0c3ff3SLuis R. Rodriguez 13773e0c3ff3SLuis R. Rodriguez size_of_regd = sizeof(struct ieee80211_regdomain) + 13783e0c3ff3SLuis R. Rodriguez ((src_regd->n_reg_rules + 1) * sizeof(struct ieee80211_reg_rule)); 13793e0c3ff3SLuis R. Rodriguez 13803e0c3ff3SLuis R. Rodriguez regd = kzalloc(size_of_regd, GFP_KERNEL); 13813e0c3ff3SLuis R. Rodriguez if (!regd) 13823e0c3ff3SLuis R. Rodriguez return -ENOMEM; 13833e0c3ff3SLuis R. Rodriguez 13843e0c3ff3SLuis R. Rodriguez memcpy(regd, src_regd, sizeof(struct ieee80211_regdomain)); 13853e0c3ff3SLuis R. Rodriguez 13863e0c3ff3SLuis R. Rodriguez for (i = 0; i < src_regd->n_reg_rules; i++) 13873e0c3ff3SLuis R. Rodriguez memcpy(®d->reg_rules[i], &src_regd->reg_rules[i], 13883e0c3ff3SLuis R. Rodriguez sizeof(struct ieee80211_reg_rule)); 13893e0c3ff3SLuis R. Rodriguez 13903e0c3ff3SLuis R. Rodriguez *dst_regd = regd; 13913e0c3ff3SLuis R. Rodriguez return 0; 1392b2e1b302SLuis R. Rodriguez } 1393b2e1b302SLuis R. Rodriguez 1394fb1fc7adSLuis R. Rodriguez /* 1395fb1fc7adSLuis R. Rodriguez * Return value which can be used by ignore_request() to indicate 1396fb1fc7adSLuis R. Rodriguez * it has been determined we should intersect two regulatory domains 1397fb1fc7adSLuis R. Rodriguez */ 13989c96477dSLuis R. Rodriguez #define REG_INTERSECT 1 13999c96477dSLuis R. Rodriguez 140084fa4f43SJohannes Berg /* This has the logic which determines when a new request 140184fa4f43SJohannes Berg * should be ignored. */ 14022f92cd2eSLuis R. Rodriguez static int ignore_request(struct wiphy *wiphy, 14032f92cd2eSLuis R. Rodriguez struct regulatory_request *pending_request) 140484fa4f43SJohannes Berg { 1405806a9e39SLuis R. Rodriguez struct wiphy *last_wiphy = NULL; 1406761cf7ecSLuis R. Rodriguez 1407761cf7ecSLuis R. Rodriguez assert_cfg80211_lock(); 1408761cf7ecSLuis R. Rodriguez 140984fa4f43SJohannes Berg /* All initial requests are respected */ 141084fa4f43SJohannes Berg if (!last_request) 141184fa4f43SJohannes Berg return 0; 141284fa4f43SJohannes Berg 14132f92cd2eSLuis R. Rodriguez switch (pending_request->initiator) { 14147db90f4aSLuis R. Rodriguez case NL80211_REGDOM_SET_BY_CORE: 1415ba25c141SLuis R. Rodriguez return -EINVAL; 14167db90f4aSLuis R. Rodriguez case NL80211_REGDOM_SET_BY_COUNTRY_IE: 1417806a9e39SLuis R. Rodriguez 1418806a9e39SLuis R. Rodriguez last_wiphy = wiphy_idx_to_wiphy(last_request->wiphy_idx); 1419806a9e39SLuis R. Rodriguez 14202f92cd2eSLuis R. Rodriguez if (unlikely(!is_an_alpha2(pending_request->alpha2))) 142184fa4f43SJohannes Berg return -EINVAL; 14227db90f4aSLuis R. Rodriguez if (last_request->initiator == 14237db90f4aSLuis R. Rodriguez NL80211_REGDOM_SET_BY_COUNTRY_IE) { 1424806a9e39SLuis R. Rodriguez if (last_wiphy != wiphy) { 142584fa4f43SJohannes Berg /* 142684fa4f43SJohannes Berg * Two cards with two APs claiming different 14271fe90b03SThadeu Lima de Souza Cascardo * Country IE alpha2s. We could 142884fa4f43SJohannes Berg * intersect them, but that seems unlikely 142984fa4f43SJohannes Berg * to be correct. Reject second one for now. 143084fa4f43SJohannes Berg */ 14312f92cd2eSLuis R. Rodriguez if (regdom_changes(pending_request->alpha2)) 143284fa4f43SJohannes Berg return -EOPNOTSUPP; 143384fa4f43SJohannes Berg return -EALREADY; 143484fa4f43SJohannes Berg } 1435fb1fc7adSLuis R. Rodriguez /* 1436fb1fc7adSLuis R. Rodriguez * Two consecutive Country IE hints on the same wiphy. 1437fb1fc7adSLuis R. Rodriguez * This should be picked up early by the driver/stack 1438fb1fc7adSLuis R. Rodriguez */ 14392f92cd2eSLuis R. Rodriguez if (WARN_ON(regdom_changes(pending_request->alpha2))) 144084fa4f43SJohannes Berg return 0; 144184fa4f43SJohannes Berg return -EALREADY; 144284fa4f43SJohannes Berg } 14433f2355cbSLuis R. Rodriguez return REG_INTERSECT; 14447db90f4aSLuis R. Rodriguez case NL80211_REGDOM_SET_BY_DRIVER: 14457db90f4aSLuis R. Rodriguez if (last_request->initiator == NL80211_REGDOM_SET_BY_CORE) { 1446e74b1e7fSLuis R. Rodriguez if (is_old_static_regdom(cfg80211_regdomain)) 144784fa4f43SJohannes Berg return 0; 14482f92cd2eSLuis R. Rodriguez if (regdom_changes(pending_request->alpha2)) 1449e74b1e7fSLuis R. Rodriguez return 0; 1450e74b1e7fSLuis R. Rodriguez return -EALREADY; 1451e74b1e7fSLuis R. Rodriguez } 1452fff32c04SLuis R. Rodriguez 1453fff32c04SLuis R. Rodriguez /* 1454fff32c04SLuis R. Rodriguez * This would happen if you unplug and plug your card 1455fff32c04SLuis R. Rodriguez * back in or if you add a new device for which the previously 1456fff32c04SLuis R. Rodriguez * loaded card also agrees on the regulatory domain. 1457fff32c04SLuis R. Rodriguez */ 14587db90f4aSLuis R. Rodriguez if (last_request->initiator == NL80211_REGDOM_SET_BY_DRIVER && 14592f92cd2eSLuis R. Rodriguez !regdom_changes(pending_request->alpha2)) 1460fff32c04SLuis R. Rodriguez return -EALREADY; 1461fff32c04SLuis R. Rodriguez 14623e0c3ff3SLuis R. Rodriguez return REG_INTERSECT; 14637db90f4aSLuis R. Rodriguez case NL80211_REGDOM_SET_BY_USER: 14647db90f4aSLuis R. Rodriguez if (last_request->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) 14659c96477dSLuis R. Rodriguez return REG_INTERSECT; 1466fb1fc7adSLuis R. Rodriguez /* 1467fb1fc7adSLuis R. Rodriguez * If the user knows better the user should set the regdom 1468fb1fc7adSLuis R. Rodriguez * to their country before the IE is picked up 1469fb1fc7adSLuis R. Rodriguez */ 14707db90f4aSLuis R. Rodriguez if (last_request->initiator == NL80211_REGDOM_SET_BY_USER && 14713f2355cbSLuis R. Rodriguez last_request->intersect) 14723f2355cbSLuis R. Rodriguez return -EOPNOTSUPP; 1473fb1fc7adSLuis R. Rodriguez /* 1474fb1fc7adSLuis R. Rodriguez * Process user requests only after previous user/driver/core 1475fb1fc7adSLuis R. Rodriguez * requests have been processed 1476fb1fc7adSLuis R. Rodriguez */ 14777db90f4aSLuis R. Rodriguez if (last_request->initiator == NL80211_REGDOM_SET_BY_CORE || 14787db90f4aSLuis R. Rodriguez last_request->initiator == NL80211_REGDOM_SET_BY_DRIVER || 14797db90f4aSLuis R. Rodriguez last_request->initiator == NL80211_REGDOM_SET_BY_USER) { 148069b1572bSLuis R. Rodriguez if (regdom_changes(last_request->alpha2)) 14815eebade6SLuis R. Rodriguez return -EAGAIN; 14825eebade6SLuis R. Rodriguez } 14835eebade6SLuis R. Rodriguez 1484e74b1e7fSLuis R. Rodriguez if (!is_old_static_regdom(cfg80211_regdomain) && 14852f92cd2eSLuis R. Rodriguez !regdom_changes(pending_request->alpha2)) 1486e74b1e7fSLuis R. Rodriguez return -EALREADY; 1487e74b1e7fSLuis R. Rodriguez 148884fa4f43SJohannes Berg return 0; 148984fa4f43SJohannes Berg } 149084fa4f43SJohannes Berg 149184fa4f43SJohannes Berg return -EINVAL; 149284fa4f43SJohannes Berg } 149384fa4f43SJohannes Berg 1494d1c96a9aSLuis R. Rodriguez /** 1495d1c96a9aSLuis R. Rodriguez * __regulatory_hint - hint to the wireless core a regulatory domain 1496d1c96a9aSLuis R. Rodriguez * @wiphy: if the hint comes from country information from an AP, this 1497d1c96a9aSLuis R. Rodriguez * is required to be set to the wiphy that received the information 149828da32d7SLuis R. Rodriguez * @pending_request: the regulatory request currently being processed 1499d1c96a9aSLuis R. Rodriguez * 1500d1c96a9aSLuis R. Rodriguez * The Wireless subsystem can use this function to hint to the wireless core 150128da32d7SLuis R. Rodriguez * what it believes should be the current regulatory domain. 1502d1c96a9aSLuis R. Rodriguez * 1503d1c96a9aSLuis R. Rodriguez * Returns zero if all went fine, %-EALREADY if a regulatory domain had 1504d1c96a9aSLuis R. Rodriguez * already been set or other standard error codes. 1505d1c96a9aSLuis R. Rodriguez * 1506abc7381bSLuis R. Rodriguez * Caller must hold &cfg80211_mutex and ®_mutex 1507d1c96a9aSLuis R. Rodriguez */ 150828da32d7SLuis R. Rodriguez static int __regulatory_hint(struct wiphy *wiphy, 150928da32d7SLuis R. Rodriguez struct regulatory_request *pending_request) 1510b2e1b302SLuis R. Rodriguez { 15119c96477dSLuis R. Rodriguez bool intersect = false; 1512b2e1b302SLuis R. Rodriguez int r = 0; 1513b2e1b302SLuis R. Rodriguez 1514761cf7ecSLuis R. Rodriguez assert_cfg80211_lock(); 1515761cf7ecSLuis R. Rodriguez 15162f92cd2eSLuis R. Rodriguez r = ignore_request(wiphy, pending_request); 15179c96477dSLuis R. Rodriguez 15183e0c3ff3SLuis R. Rodriguez if (r == REG_INTERSECT) { 15197db90f4aSLuis R. Rodriguez if (pending_request->initiator == 15207db90f4aSLuis R. Rodriguez NL80211_REGDOM_SET_BY_DRIVER) { 15213e0c3ff3SLuis R. Rodriguez r = reg_copy_regd(&wiphy->regd, cfg80211_regdomain); 1522d951c1ddSLuis R. Rodriguez if (r) { 1523d951c1ddSLuis R. Rodriguez kfree(pending_request); 1524b2e1b302SLuis R. Rodriguez return r; 15253e0c3ff3SLuis R. Rodriguez } 1526d951c1ddSLuis R. Rodriguez } 15273e0c3ff3SLuis R. Rodriguez intersect = true; 15283e0c3ff3SLuis R. Rodriguez } else if (r) { 1529fb1fc7adSLuis R. Rodriguez /* 1530fb1fc7adSLuis R. Rodriguez * If the regulatory domain being requested by the 15313e0c3ff3SLuis R. Rodriguez * driver has already been set just copy it to the 1532fb1fc7adSLuis R. Rodriguez * wiphy 1533fb1fc7adSLuis R. Rodriguez */ 153428da32d7SLuis R. Rodriguez if (r == -EALREADY && 15357db90f4aSLuis R. Rodriguez pending_request->initiator == 15367db90f4aSLuis R. Rodriguez NL80211_REGDOM_SET_BY_DRIVER) { 15373e0c3ff3SLuis R. Rodriguez r = reg_copy_regd(&wiphy->regd, cfg80211_regdomain); 1538d951c1ddSLuis R. Rodriguez if (r) { 1539d951c1ddSLuis R. Rodriguez kfree(pending_request); 15403e0c3ff3SLuis R. Rodriguez return r; 1541d951c1ddSLuis R. Rodriguez } 15423e0c3ff3SLuis R. Rodriguez r = -EALREADY; 15433e0c3ff3SLuis R. Rodriguez goto new_request; 15443e0c3ff3SLuis R. Rodriguez } 1545d951c1ddSLuis R. Rodriguez kfree(pending_request); 15463e0c3ff3SLuis R. Rodriguez return r; 15473e0c3ff3SLuis R. Rodriguez } 1548b2e1b302SLuis R. Rodriguez 15493e0c3ff3SLuis R. Rodriguez new_request: 1550f6037d09SJohannes Berg kfree(last_request); 1551d951c1ddSLuis R. Rodriguez 1552d951c1ddSLuis R. Rodriguez last_request = pending_request; 1553d951c1ddSLuis R. Rodriguez last_request->intersect = intersect; 1554d951c1ddSLuis R. Rodriguez 1555d951c1ddSLuis R. Rodriguez pending_request = NULL; 15563e0c3ff3SLuis R. Rodriguez 15573e0c3ff3SLuis R. Rodriguez /* When r == REG_INTERSECT we do need to call CRDA */ 155873d54c9eSLuis R. Rodriguez if (r < 0) { 155973d54c9eSLuis R. Rodriguez /* 156073d54c9eSLuis R. Rodriguez * Since CRDA will not be called in this case as we already 156173d54c9eSLuis R. Rodriguez * have applied the requested regulatory domain before we just 156273d54c9eSLuis R. Rodriguez * inform userspace we have processed the request 156373d54c9eSLuis R. Rodriguez */ 156473d54c9eSLuis R. Rodriguez if (r == -EALREADY) 156573d54c9eSLuis R. Rodriguez nl80211_send_reg_change_event(last_request); 15663e0c3ff3SLuis R. Rodriguez return r; 156773d54c9eSLuis R. Rodriguez } 15683e0c3ff3SLuis R. Rodriguez 1569d951c1ddSLuis R. Rodriguez return call_crda(last_request->alpha2); 1570b2e1b302SLuis R. Rodriguez } 1571b2e1b302SLuis R. Rodriguez 157230a548c7SLuis R. Rodriguez /* This processes *all* regulatory hints */ 1573d951c1ddSLuis R. Rodriguez static void reg_process_hint(struct regulatory_request *reg_request) 1574fe33eb39SLuis R. Rodriguez { 1575fe33eb39SLuis R. Rodriguez int r = 0; 1576fe33eb39SLuis R. Rodriguez struct wiphy *wiphy = NULL; 1577fe33eb39SLuis R. Rodriguez 1578fe33eb39SLuis R. Rodriguez BUG_ON(!reg_request->alpha2); 1579fe33eb39SLuis R. Rodriguez 1580fe33eb39SLuis R. Rodriguez mutex_lock(&cfg80211_mutex); 1581abc7381bSLuis R. Rodriguez mutex_lock(®_mutex); 1582fe33eb39SLuis R. Rodriguez 1583fe33eb39SLuis R. Rodriguez if (wiphy_idx_valid(reg_request->wiphy_idx)) 1584fe33eb39SLuis R. Rodriguez wiphy = wiphy_idx_to_wiphy(reg_request->wiphy_idx); 1585fe33eb39SLuis R. Rodriguez 15867db90f4aSLuis R. Rodriguez if (reg_request->initiator == NL80211_REGDOM_SET_BY_DRIVER && 1587fe33eb39SLuis R. Rodriguez !wiphy) { 1588d951c1ddSLuis R. Rodriguez kfree(reg_request); 1589fe33eb39SLuis R. Rodriguez goto out; 1590fe33eb39SLuis R. Rodriguez } 1591fe33eb39SLuis R. Rodriguez 159228da32d7SLuis R. Rodriguez r = __regulatory_hint(wiphy, reg_request); 1593fe33eb39SLuis R. Rodriguez /* This is required so that the orig_* parameters are saved */ 1594fe33eb39SLuis R. Rodriguez if (r == -EALREADY && wiphy && wiphy->strict_regulatory) 1595fe33eb39SLuis R. Rodriguez wiphy_update_regulatory(wiphy, reg_request->initiator); 1596fe33eb39SLuis R. Rodriguez out: 1597abc7381bSLuis R. Rodriguez mutex_unlock(®_mutex); 1598fe33eb39SLuis R. Rodriguez mutex_unlock(&cfg80211_mutex); 1599fe33eb39SLuis R. Rodriguez } 1600fe33eb39SLuis R. Rodriguez 16017db90f4aSLuis R. Rodriguez /* Processes regulatory hints, this is all the NL80211_REGDOM_SET_BY_* */ 1602fe33eb39SLuis R. Rodriguez static void reg_process_pending_hints(void) 1603fe33eb39SLuis R. Rodriguez { 1604fe33eb39SLuis R. Rodriguez struct regulatory_request *reg_request; 1605fe33eb39SLuis R. Rodriguez 1606fe33eb39SLuis R. Rodriguez spin_lock(®_requests_lock); 1607fe33eb39SLuis R. Rodriguez while (!list_empty(®_requests_list)) { 1608fe33eb39SLuis R. Rodriguez reg_request = list_first_entry(®_requests_list, 1609fe33eb39SLuis R. Rodriguez struct regulatory_request, 1610fe33eb39SLuis R. Rodriguez list); 1611fe33eb39SLuis R. Rodriguez list_del_init(®_request->list); 1612fe33eb39SLuis R. Rodriguez 1613d951c1ddSLuis R. Rodriguez spin_unlock(®_requests_lock); 1614d951c1ddSLuis R. Rodriguez reg_process_hint(reg_request); 1615fe33eb39SLuis R. Rodriguez spin_lock(®_requests_lock); 1616fe33eb39SLuis R. Rodriguez } 1617fe33eb39SLuis R. Rodriguez spin_unlock(®_requests_lock); 1618fe33eb39SLuis R. Rodriguez } 1619fe33eb39SLuis R. Rodriguez 1620e38f8a7aSLuis R. Rodriguez /* Processes beacon hints -- this has nothing to do with country IEs */ 1621e38f8a7aSLuis R. Rodriguez static void reg_process_pending_beacon_hints(void) 1622e38f8a7aSLuis R. Rodriguez { 162379c97e97SJohannes Berg struct cfg80211_registered_device *rdev; 1624e38f8a7aSLuis R. Rodriguez struct reg_beacon *pending_beacon, *tmp; 1625e38f8a7aSLuis R. Rodriguez 1626abc7381bSLuis R. Rodriguez /* 1627abc7381bSLuis R. Rodriguez * No need to hold the reg_mutex here as we just touch wiphys 1628abc7381bSLuis R. Rodriguez * and do not read or access regulatory variables. 1629abc7381bSLuis R. Rodriguez */ 1630e38f8a7aSLuis R. Rodriguez mutex_lock(&cfg80211_mutex); 1631e38f8a7aSLuis R. Rodriguez 1632e38f8a7aSLuis R. Rodriguez /* This goes through the _pending_ beacon list */ 1633e38f8a7aSLuis R. Rodriguez spin_lock_bh(®_pending_beacons_lock); 1634e38f8a7aSLuis R. Rodriguez 1635e38f8a7aSLuis R. Rodriguez if (list_empty(®_pending_beacons)) { 1636e38f8a7aSLuis R. Rodriguez spin_unlock_bh(®_pending_beacons_lock); 1637e38f8a7aSLuis R. Rodriguez goto out; 1638e38f8a7aSLuis R. Rodriguez } 1639e38f8a7aSLuis R. Rodriguez 1640e38f8a7aSLuis R. Rodriguez list_for_each_entry_safe(pending_beacon, tmp, 1641e38f8a7aSLuis R. Rodriguez ®_pending_beacons, list) { 1642e38f8a7aSLuis R. Rodriguez 1643e38f8a7aSLuis R. Rodriguez list_del_init(&pending_beacon->list); 1644e38f8a7aSLuis R. Rodriguez 1645e38f8a7aSLuis R. Rodriguez /* Applies the beacon hint to current wiphys */ 164679c97e97SJohannes Berg list_for_each_entry(rdev, &cfg80211_rdev_list, list) 164779c97e97SJohannes Berg wiphy_update_new_beacon(&rdev->wiphy, pending_beacon); 1648e38f8a7aSLuis R. Rodriguez 1649e38f8a7aSLuis R. Rodriguez /* Remembers the beacon hint for new wiphys or reg changes */ 1650e38f8a7aSLuis R. Rodriguez list_add_tail(&pending_beacon->list, ®_beacon_list); 1651e38f8a7aSLuis R. Rodriguez } 1652e38f8a7aSLuis R. Rodriguez 1653e38f8a7aSLuis R. Rodriguez spin_unlock_bh(®_pending_beacons_lock); 1654e38f8a7aSLuis R. Rodriguez out: 1655e38f8a7aSLuis R. Rodriguez mutex_unlock(&cfg80211_mutex); 1656e38f8a7aSLuis R. Rodriguez } 1657e38f8a7aSLuis R. Rodriguez 1658fe33eb39SLuis R. Rodriguez static void reg_todo(struct work_struct *work) 1659fe33eb39SLuis R. Rodriguez { 1660fe33eb39SLuis R. Rodriguez reg_process_pending_hints(); 1661e38f8a7aSLuis R. Rodriguez reg_process_pending_beacon_hints(); 1662fe33eb39SLuis R. Rodriguez } 1663fe33eb39SLuis R. Rodriguez 1664fe33eb39SLuis R. Rodriguez static DECLARE_WORK(reg_work, reg_todo); 1665fe33eb39SLuis R. Rodriguez 1666fe33eb39SLuis R. Rodriguez static void queue_regulatory_request(struct regulatory_request *request) 1667fe33eb39SLuis R. Rodriguez { 1668fe33eb39SLuis R. Rodriguez spin_lock(®_requests_lock); 1669fe33eb39SLuis R. Rodriguez list_add_tail(&request->list, ®_requests_list); 1670fe33eb39SLuis R. Rodriguez spin_unlock(®_requests_lock); 1671fe33eb39SLuis R. Rodriguez 1672fe33eb39SLuis R. Rodriguez schedule_work(®_work); 1673fe33eb39SLuis R. Rodriguez } 1674fe33eb39SLuis R. Rodriguez 1675fe33eb39SLuis R. Rodriguez /* Core regulatory hint -- happens once during cfg80211_init() */ 1676ba25c141SLuis R. Rodriguez static int regulatory_hint_core(const char *alpha2) 1677ba25c141SLuis R. Rodriguez { 1678ba25c141SLuis R. Rodriguez struct regulatory_request *request; 1679ba25c141SLuis R. Rodriguez 1680ba25c141SLuis R. Rodriguez BUG_ON(last_request); 1681ba25c141SLuis R. Rodriguez 1682ba25c141SLuis R. Rodriguez request = kzalloc(sizeof(struct regulatory_request), 1683ba25c141SLuis R. Rodriguez GFP_KERNEL); 1684ba25c141SLuis R. Rodriguez if (!request) 1685ba25c141SLuis R. Rodriguez return -ENOMEM; 1686ba25c141SLuis R. Rodriguez 1687ba25c141SLuis R. Rodriguez request->alpha2[0] = alpha2[0]; 1688ba25c141SLuis R. Rodriguez request->alpha2[1] = alpha2[1]; 16897db90f4aSLuis R. Rodriguez request->initiator = NL80211_REGDOM_SET_BY_CORE; 1690ba25c141SLuis R. Rodriguez 1691fe33eb39SLuis R. Rodriguez queue_regulatory_request(request); 1692ba25c141SLuis R. Rodriguez 16935078b2e3SLuis R. Rodriguez /* 16945078b2e3SLuis R. Rodriguez * This ensures last_request is populated once modules 16955078b2e3SLuis R. Rodriguez * come swinging in and calling regulatory hints and 16965078b2e3SLuis R. Rodriguez * wiphy_apply_custom_regulatory(). 16975078b2e3SLuis R. Rodriguez */ 16985078b2e3SLuis R. Rodriguez flush_scheduled_work(); 16995078b2e3SLuis R. Rodriguez 1700fe33eb39SLuis R. Rodriguez return 0; 1701ba25c141SLuis R. Rodriguez } 1702ba25c141SLuis R. Rodriguez 1703fe33eb39SLuis R. Rodriguez /* User hints */ 1704fe33eb39SLuis R. Rodriguez int regulatory_hint_user(const char *alpha2) 1705b2e1b302SLuis R. Rodriguez { 1706fe33eb39SLuis R. Rodriguez struct regulatory_request *request; 1707fe33eb39SLuis R. Rodriguez 1708be3d4810SJohannes Berg BUG_ON(!alpha2); 1709b2e1b302SLuis R. Rodriguez 1710fe33eb39SLuis R. Rodriguez request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); 1711fe33eb39SLuis R. Rodriguez if (!request) 1712fe33eb39SLuis R. Rodriguez return -ENOMEM; 1713fe33eb39SLuis R. Rodriguez 1714fe33eb39SLuis R. Rodriguez request->wiphy_idx = WIPHY_IDX_STALE; 1715fe33eb39SLuis R. Rodriguez request->alpha2[0] = alpha2[0]; 1716fe33eb39SLuis R. Rodriguez request->alpha2[1] = alpha2[1]; 17177db90f4aSLuis R. Rodriguez request->initiator = NL80211_REGDOM_SET_BY_USER, 1718fe33eb39SLuis R. Rodriguez 1719fe33eb39SLuis R. Rodriguez queue_regulatory_request(request); 1720fe33eb39SLuis R. Rodriguez 1721fe33eb39SLuis R. Rodriguez return 0; 1722fe33eb39SLuis R. Rodriguez } 1723fe33eb39SLuis R. Rodriguez 1724fe33eb39SLuis R. Rodriguez /* Driver hints */ 1725fe33eb39SLuis R. Rodriguez int regulatory_hint(struct wiphy *wiphy, const char *alpha2) 1726fe33eb39SLuis R. Rodriguez { 1727fe33eb39SLuis R. Rodriguez struct regulatory_request *request; 1728fe33eb39SLuis R. Rodriguez 1729fe33eb39SLuis R. Rodriguez BUG_ON(!alpha2); 1730fe33eb39SLuis R. Rodriguez BUG_ON(!wiphy); 1731fe33eb39SLuis R. Rodriguez 1732fe33eb39SLuis R. Rodriguez request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); 1733fe33eb39SLuis R. Rodriguez if (!request) 1734fe33eb39SLuis R. Rodriguez return -ENOMEM; 1735fe33eb39SLuis R. Rodriguez 1736fe33eb39SLuis R. Rodriguez request->wiphy_idx = get_wiphy_idx(wiphy); 1737fe33eb39SLuis R. Rodriguez 1738fe33eb39SLuis R. Rodriguez /* Must have registered wiphy first */ 1739fe33eb39SLuis R. Rodriguez BUG_ON(!wiphy_idx_valid(request->wiphy_idx)); 1740fe33eb39SLuis R. Rodriguez 1741fe33eb39SLuis R. Rodriguez request->alpha2[0] = alpha2[0]; 1742fe33eb39SLuis R. Rodriguez request->alpha2[1] = alpha2[1]; 17437db90f4aSLuis R. Rodriguez request->initiator = NL80211_REGDOM_SET_BY_DRIVER; 1744fe33eb39SLuis R. Rodriguez 1745fe33eb39SLuis R. Rodriguez queue_regulatory_request(request); 1746fe33eb39SLuis R. Rodriguez 1747fe33eb39SLuis R. Rodriguez return 0; 1748b2e1b302SLuis R. Rodriguez } 1749b2e1b302SLuis R. Rodriguez EXPORT_SYMBOL(regulatory_hint); 1750b2e1b302SLuis R. Rodriguez 1751abc7381bSLuis R. Rodriguez /* Caller must hold reg_mutex */ 17523f2355cbSLuis R. Rodriguez static bool reg_same_country_ie_hint(struct wiphy *wiphy, 17533f2355cbSLuis R. Rodriguez u32 country_ie_checksum) 17543f2355cbSLuis R. Rodriguez { 1755806a9e39SLuis R. Rodriguez struct wiphy *request_wiphy; 1756806a9e39SLuis R. Rodriguez 1757abc7381bSLuis R. Rodriguez assert_reg_lock(); 1758761cf7ecSLuis R. Rodriguez 1759cc0b6fe8SLuis R. Rodriguez if (unlikely(last_request->initiator != 1760cc0b6fe8SLuis R. Rodriguez NL80211_REGDOM_SET_BY_COUNTRY_IE)) 1761cc0b6fe8SLuis R. Rodriguez return false; 1762cc0b6fe8SLuis R. Rodriguez 1763806a9e39SLuis R. Rodriguez request_wiphy = wiphy_idx_to_wiphy(last_request->wiphy_idx); 1764806a9e39SLuis R. Rodriguez 1765806a9e39SLuis R. Rodriguez if (!request_wiphy) 17663f2355cbSLuis R. Rodriguez return false; 1767806a9e39SLuis R. Rodriguez 1768806a9e39SLuis R. Rodriguez if (likely(request_wiphy != wiphy)) 17693f2355cbSLuis R. Rodriguez return !country_ie_integrity_changes(country_ie_checksum); 1770fb1fc7adSLuis R. Rodriguez /* 1771fb1fc7adSLuis R. Rodriguez * We should not have let these through at this point, they 17723f2355cbSLuis R. Rodriguez * should have been picked up earlier by the first alpha2 check 1773fb1fc7adSLuis R. Rodriguez * on the device 1774fb1fc7adSLuis R. Rodriguez */ 17753f2355cbSLuis R. Rodriguez if (WARN_ON(!country_ie_integrity_changes(country_ie_checksum))) 17763f2355cbSLuis R. Rodriguez return true; 17773f2355cbSLuis R. Rodriguez return false; 17783f2355cbSLuis R. Rodriguez } 17793f2355cbSLuis R. Rodriguez 17804b44c8bcSLuis R. Rodriguez /* 17814b44c8bcSLuis R. Rodriguez * We hold wdev_lock() here so we cannot hold cfg80211_mutex() and 17824b44c8bcSLuis R. Rodriguez * therefore cannot iterate over the rdev list here. 17834b44c8bcSLuis R. Rodriguez */ 17843f2355cbSLuis R. Rodriguez void regulatory_hint_11d(struct wiphy *wiphy, 17853f2355cbSLuis R. Rodriguez u8 *country_ie, 17863f2355cbSLuis R. Rodriguez u8 country_ie_len) 17873f2355cbSLuis R. Rodriguez { 17883f2355cbSLuis R. Rodriguez struct ieee80211_regdomain *rd = NULL; 17893f2355cbSLuis R. Rodriguez char alpha2[2]; 17903f2355cbSLuis R. Rodriguez u32 checksum = 0; 17913f2355cbSLuis R. Rodriguez enum environment_cap env = ENVIRON_ANY; 1792fe33eb39SLuis R. Rodriguez struct regulatory_request *request; 17933f2355cbSLuis R. Rodriguez 1794abc7381bSLuis R. Rodriguez mutex_lock(®_mutex); 17953f2355cbSLuis R. Rodriguez 17969828b017SLuis R. Rodriguez if (unlikely(!last_request)) 17979828b017SLuis R. Rodriguez goto out; 1798d335fe63SLuis R. Rodriguez 17993f2355cbSLuis R. Rodriguez /* IE len must be evenly divisible by 2 */ 18003f2355cbSLuis R. Rodriguez if (country_ie_len & 0x01) 18013f2355cbSLuis R. Rodriguez goto out; 18023f2355cbSLuis R. Rodriguez 18033f2355cbSLuis R. Rodriguez if (country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN) 18043f2355cbSLuis R. Rodriguez goto out; 18053f2355cbSLuis R. Rodriguez 1806fb1fc7adSLuis R. Rodriguez /* 1807fb1fc7adSLuis R. Rodriguez * Pending country IE processing, this can happen after we 18083f2355cbSLuis R. Rodriguez * call CRDA and wait for a response if a beacon was received before 1809fb1fc7adSLuis R. Rodriguez * we were able to process the last regulatory_hint_11d() call 1810fb1fc7adSLuis R. Rodriguez */ 18113f2355cbSLuis R. Rodriguez if (country_ie_regdomain) 18123f2355cbSLuis R. Rodriguez goto out; 18133f2355cbSLuis R. Rodriguez 18143f2355cbSLuis R. Rodriguez alpha2[0] = country_ie[0]; 18153f2355cbSLuis R. Rodriguez alpha2[1] = country_ie[1]; 18163f2355cbSLuis R. Rodriguez 18173f2355cbSLuis R. Rodriguez if (country_ie[2] == 'I') 18183f2355cbSLuis R. Rodriguez env = ENVIRON_INDOOR; 18193f2355cbSLuis R. Rodriguez else if (country_ie[2] == 'O') 18203f2355cbSLuis R. Rodriguez env = ENVIRON_OUTDOOR; 18213f2355cbSLuis R. Rodriguez 1822fb1fc7adSLuis R. Rodriguez /* 18238b19e6caSLuis R. Rodriguez * We will run this only upon a successful connection on cfg80211. 18244b44c8bcSLuis R. Rodriguez * We leave conflict resolution to the workqueue, where can hold 18254b44c8bcSLuis R. Rodriguez * cfg80211_mutex. 1826fb1fc7adSLuis R. Rodriguez */ 1827cc0b6fe8SLuis R. Rodriguez if (likely(last_request->initiator == 1828cc0b6fe8SLuis R. Rodriguez NL80211_REGDOM_SET_BY_COUNTRY_IE && 18294b44c8bcSLuis R. Rodriguez wiphy_idx_valid(last_request->wiphy_idx))) 18303f2355cbSLuis R. Rodriguez goto out; 18313f2355cbSLuis R. Rodriguez 18323f2355cbSLuis R. Rodriguez rd = country_ie_2_rd(country_ie, country_ie_len, &checksum); 18333f2355cbSLuis R. Rodriguez if (!rd) 18343f2355cbSLuis R. Rodriguez goto out; 18353f2355cbSLuis R. Rodriguez 1836915278e0SLuis R. Rodriguez /* 1837915278e0SLuis R. Rodriguez * This will not happen right now but we leave it here for the 18383f2355cbSLuis R. Rodriguez * the future when we want to add suspend/resume support and having 18393f2355cbSLuis R. Rodriguez * the user move to another country after doing so, or having the user 1840915278e0SLuis R. Rodriguez * move to another AP. Right now we just trust the first AP. 1841915278e0SLuis R. Rodriguez * 1842915278e0SLuis R. Rodriguez * If we hit this before we add this support we want to be informed of 1843915278e0SLuis R. Rodriguez * it as it would indicate a mistake in the current design 1844915278e0SLuis R. Rodriguez */ 1845915278e0SLuis R. Rodriguez if (WARN_ON(reg_same_country_ie_hint(wiphy, checksum))) 18460441d6ffSLuis R. Rodriguez goto free_rd_out; 18473f2355cbSLuis R. Rodriguez 1848fe33eb39SLuis R. Rodriguez request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); 1849fe33eb39SLuis R. Rodriguez if (!request) 1850fe33eb39SLuis R. Rodriguez goto free_rd_out; 1851fe33eb39SLuis R. Rodriguez 1852fb1fc7adSLuis R. Rodriguez /* 1853fb1fc7adSLuis R. Rodriguez * We keep this around for when CRDA comes back with a response so 1854fb1fc7adSLuis R. Rodriguez * we can intersect with that 1855fb1fc7adSLuis R. Rodriguez */ 18563f2355cbSLuis R. Rodriguez country_ie_regdomain = rd; 18573f2355cbSLuis R. Rodriguez 1858fe33eb39SLuis R. Rodriguez request->wiphy_idx = get_wiphy_idx(wiphy); 1859fe33eb39SLuis R. Rodriguez request->alpha2[0] = rd->alpha2[0]; 1860fe33eb39SLuis R. Rodriguez request->alpha2[1] = rd->alpha2[1]; 18617db90f4aSLuis R. Rodriguez request->initiator = NL80211_REGDOM_SET_BY_COUNTRY_IE; 1862fe33eb39SLuis R. Rodriguez request->country_ie_checksum = checksum; 1863fe33eb39SLuis R. Rodriguez request->country_ie_env = env; 18643f2355cbSLuis R. Rodriguez 1865abc7381bSLuis R. Rodriguez mutex_unlock(®_mutex); 1866fe33eb39SLuis R. Rodriguez 1867fe33eb39SLuis R. Rodriguez queue_regulatory_request(request); 1868fe33eb39SLuis R. Rodriguez 1869fe33eb39SLuis R. Rodriguez return; 18700441d6ffSLuis R. Rodriguez 18710441d6ffSLuis R. Rodriguez free_rd_out: 18720441d6ffSLuis R. Rodriguez kfree(rd); 18733f2355cbSLuis R. Rodriguez out: 1874abc7381bSLuis R. Rodriguez mutex_unlock(®_mutex); 18753f2355cbSLuis R. Rodriguez } 1876b2e1b302SLuis R. Rodriguez 1877e38f8a7aSLuis R. Rodriguez static bool freq_is_chan_12_13_14(u16 freq) 1878e38f8a7aSLuis R. Rodriguez { 1879e38f8a7aSLuis R. Rodriguez if (freq == ieee80211_channel_to_frequency(12) || 1880e38f8a7aSLuis R. Rodriguez freq == ieee80211_channel_to_frequency(13) || 1881e38f8a7aSLuis R. Rodriguez freq == ieee80211_channel_to_frequency(14)) 1882e38f8a7aSLuis R. Rodriguez return true; 1883e38f8a7aSLuis R. Rodriguez return false; 1884e38f8a7aSLuis R. Rodriguez } 1885e38f8a7aSLuis R. Rodriguez 1886e38f8a7aSLuis R. Rodriguez int regulatory_hint_found_beacon(struct wiphy *wiphy, 1887e38f8a7aSLuis R. Rodriguez struct ieee80211_channel *beacon_chan, 1888e38f8a7aSLuis R. Rodriguez gfp_t gfp) 1889e38f8a7aSLuis R. Rodriguez { 1890e38f8a7aSLuis R. Rodriguez struct reg_beacon *reg_beacon; 1891e38f8a7aSLuis R. Rodriguez 1892e38f8a7aSLuis R. Rodriguez if (likely((beacon_chan->beacon_found || 1893e38f8a7aSLuis R. Rodriguez (beacon_chan->flags & IEEE80211_CHAN_RADAR) || 1894e38f8a7aSLuis R. Rodriguez (beacon_chan->band == IEEE80211_BAND_2GHZ && 1895e38f8a7aSLuis R. Rodriguez !freq_is_chan_12_13_14(beacon_chan->center_freq))))) 1896e38f8a7aSLuis R. Rodriguez return 0; 1897e38f8a7aSLuis R. Rodriguez 1898e38f8a7aSLuis R. Rodriguez reg_beacon = kzalloc(sizeof(struct reg_beacon), gfp); 1899e38f8a7aSLuis R. Rodriguez if (!reg_beacon) 1900e38f8a7aSLuis R. Rodriguez return -ENOMEM; 1901e38f8a7aSLuis R. Rodriguez 1902e38f8a7aSLuis R. Rodriguez #ifdef CONFIG_CFG80211_REG_DEBUG 1903e38f8a7aSLuis R. Rodriguez printk(KERN_DEBUG "cfg80211: Found new beacon on " 1904e38f8a7aSLuis R. Rodriguez "frequency: %d MHz (Ch %d) on %s\n", 1905e38f8a7aSLuis R. Rodriguez beacon_chan->center_freq, 1906e38f8a7aSLuis R. Rodriguez ieee80211_frequency_to_channel(beacon_chan->center_freq), 1907e38f8a7aSLuis R. Rodriguez wiphy_name(wiphy)); 1908e38f8a7aSLuis R. Rodriguez #endif 1909e38f8a7aSLuis R. Rodriguez memcpy(®_beacon->chan, beacon_chan, 1910e38f8a7aSLuis R. Rodriguez sizeof(struct ieee80211_channel)); 1911e38f8a7aSLuis R. Rodriguez 1912e38f8a7aSLuis R. Rodriguez 1913e38f8a7aSLuis R. Rodriguez /* 1914e38f8a7aSLuis R. Rodriguez * Since we can be called from BH or and non-BH context 1915e38f8a7aSLuis R. Rodriguez * we must use spin_lock_bh() 1916e38f8a7aSLuis R. Rodriguez */ 1917e38f8a7aSLuis R. Rodriguez spin_lock_bh(®_pending_beacons_lock); 1918e38f8a7aSLuis R. Rodriguez list_add_tail(®_beacon->list, ®_pending_beacons); 1919e38f8a7aSLuis R. Rodriguez spin_unlock_bh(®_pending_beacons_lock); 1920e38f8a7aSLuis R. Rodriguez 1921e38f8a7aSLuis R. Rodriguez schedule_work(®_work); 1922e38f8a7aSLuis R. Rodriguez 1923e38f8a7aSLuis R. Rodriguez return 0; 1924e38f8a7aSLuis R. Rodriguez } 1925e38f8a7aSLuis R. Rodriguez 1926a3d2eaf0SJohannes Berg static void print_rd_rules(const struct ieee80211_regdomain *rd) 1927b2e1b302SLuis R. Rodriguez { 1928b2e1b302SLuis R. Rodriguez unsigned int i; 1929a3d2eaf0SJohannes Berg const struct ieee80211_reg_rule *reg_rule = NULL; 1930a3d2eaf0SJohannes Berg const struct ieee80211_freq_range *freq_range = NULL; 1931a3d2eaf0SJohannes Berg const struct ieee80211_power_rule *power_rule = NULL; 1932b2e1b302SLuis R. Rodriguez 1933b2e1b302SLuis R. Rodriguez printk(KERN_INFO "\t(start_freq - end_freq @ bandwidth), " 1934b2e1b302SLuis R. Rodriguez "(max_antenna_gain, max_eirp)\n"); 1935b2e1b302SLuis R. Rodriguez 1936b2e1b302SLuis R. Rodriguez for (i = 0; i < rd->n_reg_rules; i++) { 1937b2e1b302SLuis R. Rodriguez reg_rule = &rd->reg_rules[i]; 1938b2e1b302SLuis R. Rodriguez freq_range = ®_rule->freq_range; 1939b2e1b302SLuis R. Rodriguez power_rule = ®_rule->power_rule; 1940b2e1b302SLuis R. Rodriguez 1941fb1fc7adSLuis R. Rodriguez /* 1942fb1fc7adSLuis R. Rodriguez * There may not be documentation for max antenna gain 1943fb1fc7adSLuis R. Rodriguez * in certain regions 1944fb1fc7adSLuis R. Rodriguez */ 1945b2e1b302SLuis R. Rodriguez if (power_rule->max_antenna_gain) 1946b2e1b302SLuis R. Rodriguez printk(KERN_INFO "\t(%d KHz - %d KHz @ %d KHz), " 1947b2e1b302SLuis R. Rodriguez "(%d mBi, %d mBm)\n", 1948b2e1b302SLuis R. Rodriguez freq_range->start_freq_khz, 1949b2e1b302SLuis R. Rodriguez freq_range->end_freq_khz, 1950b2e1b302SLuis R. Rodriguez freq_range->max_bandwidth_khz, 1951b2e1b302SLuis R. Rodriguez power_rule->max_antenna_gain, 1952b2e1b302SLuis R. Rodriguez power_rule->max_eirp); 1953b2e1b302SLuis R. Rodriguez else 1954b2e1b302SLuis R. Rodriguez printk(KERN_INFO "\t(%d KHz - %d KHz @ %d KHz), " 1955b2e1b302SLuis R. Rodriguez "(N/A, %d mBm)\n", 1956b2e1b302SLuis R. Rodriguez freq_range->start_freq_khz, 1957b2e1b302SLuis R. Rodriguez freq_range->end_freq_khz, 1958b2e1b302SLuis R. Rodriguez freq_range->max_bandwidth_khz, 1959b2e1b302SLuis R. Rodriguez power_rule->max_eirp); 1960b2e1b302SLuis R. Rodriguez } 1961b2e1b302SLuis R. Rodriguez } 1962b2e1b302SLuis R. Rodriguez 1963a3d2eaf0SJohannes Berg static void print_regdomain(const struct ieee80211_regdomain *rd) 1964b2e1b302SLuis R. Rodriguez { 1965b2e1b302SLuis R. Rodriguez 19663f2355cbSLuis R. Rodriguez if (is_intersected_alpha2(rd->alpha2)) { 19673f2355cbSLuis R. Rodriguez 19687db90f4aSLuis R. Rodriguez if (last_request->initiator == 19697db90f4aSLuis R. Rodriguez NL80211_REGDOM_SET_BY_COUNTRY_IE) { 197079c97e97SJohannes Berg struct cfg80211_registered_device *rdev; 197179c97e97SJohannes Berg rdev = cfg80211_rdev_by_wiphy_idx( 1972806a9e39SLuis R. Rodriguez last_request->wiphy_idx); 197379c97e97SJohannes Berg if (rdev) { 19743f2355cbSLuis R. Rodriguez printk(KERN_INFO "cfg80211: Current regulatory " 19753f2355cbSLuis R. Rodriguez "domain updated by AP to: %c%c\n", 197679c97e97SJohannes Berg rdev->country_ie_alpha2[0], 197779c97e97SJohannes Berg rdev->country_ie_alpha2[1]); 19783f2355cbSLuis R. Rodriguez } else 19793f2355cbSLuis R. Rodriguez printk(KERN_INFO "cfg80211: Current regulatory " 19803f2355cbSLuis R. Rodriguez "domain intersected: \n"); 19813f2355cbSLuis R. Rodriguez } else 19823f2355cbSLuis R. Rodriguez printk(KERN_INFO "cfg80211: Current regulatory " 1983039498c6SLuis R. Rodriguez "domain intersected: \n"); 19843f2355cbSLuis R. Rodriguez } else if (is_world_regdom(rd->alpha2)) 1985b2e1b302SLuis R. Rodriguez printk(KERN_INFO "cfg80211: World regulatory " 1986b2e1b302SLuis R. Rodriguez "domain updated:\n"); 1987b2e1b302SLuis R. Rodriguez else { 1988b2e1b302SLuis R. Rodriguez if (is_unknown_alpha2(rd->alpha2)) 1989b2e1b302SLuis R. Rodriguez printk(KERN_INFO "cfg80211: Regulatory domain " 1990b2e1b302SLuis R. Rodriguez "changed to driver built-in settings " 1991b2e1b302SLuis R. Rodriguez "(unknown country)\n"); 1992b2e1b302SLuis R. Rodriguez else 1993b2e1b302SLuis R. Rodriguez printk(KERN_INFO "cfg80211: Regulatory domain " 1994b2e1b302SLuis R. Rodriguez "changed to country: %c%c\n", 1995b2e1b302SLuis R. Rodriguez rd->alpha2[0], rd->alpha2[1]); 1996b2e1b302SLuis R. Rodriguez } 1997b2e1b302SLuis R. Rodriguez print_rd_rules(rd); 1998b2e1b302SLuis R. Rodriguez } 1999b2e1b302SLuis R. Rodriguez 20002df78167SJohannes Berg static void print_regdomain_info(const struct ieee80211_regdomain *rd) 2001b2e1b302SLuis R. Rodriguez { 2002b2e1b302SLuis R. Rodriguez printk(KERN_INFO "cfg80211: Regulatory domain: %c%c\n", 2003b2e1b302SLuis R. Rodriguez rd->alpha2[0], rd->alpha2[1]); 2004b2e1b302SLuis R. Rodriguez print_rd_rules(rd); 2005b2e1b302SLuis R. Rodriguez } 2006b2e1b302SLuis R. Rodriguez 20073f2355cbSLuis R. Rodriguez #ifdef CONFIG_CFG80211_REG_DEBUG 20083f2355cbSLuis R. Rodriguez static void reg_country_ie_process_debug( 20093f2355cbSLuis R. Rodriguez const struct ieee80211_regdomain *rd, 20103f2355cbSLuis R. Rodriguez const struct ieee80211_regdomain *country_ie_regdomain, 20113f2355cbSLuis R. Rodriguez const struct ieee80211_regdomain *intersected_rd) 20123f2355cbSLuis R. Rodriguez { 20133f2355cbSLuis R. Rodriguez printk(KERN_DEBUG "cfg80211: Received country IE:\n"); 20143f2355cbSLuis R. Rodriguez print_regdomain_info(country_ie_regdomain); 20153f2355cbSLuis R. Rodriguez printk(KERN_DEBUG "cfg80211: CRDA thinks this should applied:\n"); 20163f2355cbSLuis R. Rodriguez print_regdomain_info(rd); 20173f2355cbSLuis R. Rodriguez if (intersected_rd) { 20183f2355cbSLuis R. Rodriguez printk(KERN_DEBUG "cfg80211: We intersect both of these " 20193f2355cbSLuis R. Rodriguez "and get:\n"); 2020667ecd01SLuis R. Rodriguez print_regdomain_info(intersected_rd); 20213f2355cbSLuis R. Rodriguez return; 20223f2355cbSLuis R. Rodriguez } 20233f2355cbSLuis R. Rodriguez printk(KERN_DEBUG "cfg80211: Intersection between both failed\n"); 20243f2355cbSLuis R. Rodriguez } 20253f2355cbSLuis R. Rodriguez #else 20263f2355cbSLuis R. Rodriguez static inline void reg_country_ie_process_debug( 20273f2355cbSLuis R. Rodriguez const struct ieee80211_regdomain *rd, 20283f2355cbSLuis R. Rodriguez const struct ieee80211_regdomain *country_ie_regdomain, 20293f2355cbSLuis R. Rodriguez const struct ieee80211_regdomain *intersected_rd) 20303f2355cbSLuis R. Rodriguez { 20313f2355cbSLuis R. Rodriguez } 20323f2355cbSLuis R. Rodriguez #endif 20333f2355cbSLuis R. Rodriguez 2034d2372b31SJohannes Berg /* Takes ownership of rd only if it doesn't fail */ 2035a3d2eaf0SJohannes Berg static int __set_regdom(const struct ieee80211_regdomain *rd) 2036b2e1b302SLuis R. Rodriguez { 20379c96477dSLuis R. Rodriguez const struct ieee80211_regdomain *intersected_rd = NULL; 203879c97e97SJohannes Berg struct cfg80211_registered_device *rdev = NULL; 2039806a9e39SLuis R. Rodriguez struct wiphy *request_wiphy; 2040b2e1b302SLuis R. Rodriguez /* Some basic sanity checks first */ 2041b2e1b302SLuis R. Rodriguez 2042b2e1b302SLuis R. Rodriguez if (is_world_regdom(rd->alpha2)) { 2043f6037d09SJohannes Berg if (WARN_ON(!reg_is_valid_request(rd->alpha2))) 2044b2e1b302SLuis R. Rodriguez return -EINVAL; 2045b2e1b302SLuis R. Rodriguez update_world_regdomain(rd); 2046b2e1b302SLuis R. Rodriguez return 0; 2047b2e1b302SLuis R. Rodriguez } 2048b2e1b302SLuis R. Rodriguez 2049b2e1b302SLuis R. Rodriguez if (!is_alpha2_set(rd->alpha2) && !is_an_alpha2(rd->alpha2) && 2050b2e1b302SLuis R. Rodriguez !is_unknown_alpha2(rd->alpha2)) 2051b2e1b302SLuis R. Rodriguez return -EINVAL; 2052b2e1b302SLuis R. Rodriguez 2053f6037d09SJohannes Berg if (!last_request) 2054b2e1b302SLuis R. Rodriguez return -EINVAL; 2055b2e1b302SLuis R. Rodriguez 2056fb1fc7adSLuis R. Rodriguez /* 2057fb1fc7adSLuis R. Rodriguez * Lets only bother proceeding on the same alpha2 if the current 20583f2355cbSLuis R. Rodriguez * rd is non static (it means CRDA was present and was used last) 2059fb1fc7adSLuis R. Rodriguez * and the pending request came in from a country IE 2060fb1fc7adSLuis R. Rodriguez */ 20617db90f4aSLuis R. Rodriguez if (last_request->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE) { 2062fb1fc7adSLuis R. Rodriguez /* 2063fb1fc7adSLuis R. Rodriguez * If someone else asked us to change the rd lets only bother 2064fb1fc7adSLuis R. Rodriguez * checking if the alpha2 changes if CRDA was already called 2065fb1fc7adSLuis R. Rodriguez */ 2066b2e1b302SLuis R. Rodriguez if (!is_old_static_regdom(cfg80211_regdomain) && 206769b1572bSLuis R. Rodriguez !regdom_changes(rd->alpha2)) 2068b2e1b302SLuis R. Rodriguez return -EINVAL; 20693f2355cbSLuis R. Rodriguez } 20703f2355cbSLuis R. Rodriguez 2071fb1fc7adSLuis R. Rodriguez /* 2072fb1fc7adSLuis R. Rodriguez * Now lets set the regulatory domain, update all driver channels 2073b2e1b302SLuis R. Rodriguez * and finally inform them of what we have done, in case they want 2074b2e1b302SLuis R. Rodriguez * to review or adjust their own settings based on their own 2075fb1fc7adSLuis R. Rodriguez * internal EEPROM data 2076fb1fc7adSLuis R. Rodriguez */ 2077b2e1b302SLuis R. Rodriguez 2078f6037d09SJohannes Berg if (WARN_ON(!reg_is_valid_request(rd->alpha2))) 2079b2e1b302SLuis R. Rodriguez return -EINVAL; 2080b2e1b302SLuis R. Rodriguez 2081b2e1b302SLuis R. Rodriguez if (!is_valid_rd(rd)) { 2082b2e1b302SLuis R. Rodriguez printk(KERN_ERR "cfg80211: Invalid " 2083b2e1b302SLuis R. Rodriguez "regulatory domain detected:\n"); 2084b2e1b302SLuis R. Rodriguez print_regdomain_info(rd); 2085b2e1b302SLuis R. Rodriguez return -EINVAL; 2086b2e1b302SLuis R. Rodriguez } 2087b2e1b302SLuis R. Rodriguez 2088806a9e39SLuis R. Rodriguez request_wiphy = wiphy_idx_to_wiphy(last_request->wiphy_idx); 2089806a9e39SLuis R. Rodriguez 2090b8295acdSLuis R. Rodriguez if (!last_request->intersect) { 20913e0c3ff3SLuis R. Rodriguez int r; 20923e0c3ff3SLuis R. Rodriguez 20937db90f4aSLuis R. Rodriguez if (last_request->initiator != NL80211_REGDOM_SET_BY_DRIVER) { 20943e0c3ff3SLuis R. Rodriguez reset_regdomains(); 20953e0c3ff3SLuis R. Rodriguez cfg80211_regdomain = rd; 20963e0c3ff3SLuis R. Rodriguez return 0; 20973e0c3ff3SLuis R. Rodriguez } 20983e0c3ff3SLuis R. Rodriguez 2099fb1fc7adSLuis R. Rodriguez /* 2100fb1fc7adSLuis R. Rodriguez * For a driver hint, lets copy the regulatory domain the 2101fb1fc7adSLuis R. Rodriguez * driver wanted to the wiphy to deal with conflicts 2102fb1fc7adSLuis R. Rodriguez */ 21033e0c3ff3SLuis R. Rodriguez 2104558f6d32SLuis R. Rodriguez /* 2105558f6d32SLuis R. Rodriguez * Userspace could have sent two replies with only 2106558f6d32SLuis R. Rodriguez * one kernel request. 2107558f6d32SLuis R. Rodriguez */ 2108558f6d32SLuis R. Rodriguez if (request_wiphy->regd) 2109558f6d32SLuis R. Rodriguez return -EALREADY; 21103e0c3ff3SLuis R. Rodriguez 2111806a9e39SLuis R. Rodriguez r = reg_copy_regd(&request_wiphy->regd, rd); 21123e0c3ff3SLuis R. Rodriguez if (r) 21133e0c3ff3SLuis R. Rodriguez return r; 21143e0c3ff3SLuis R. Rodriguez 2115b8295acdSLuis R. Rodriguez reset_regdomains(); 2116b8295acdSLuis R. Rodriguez cfg80211_regdomain = rd; 2117b8295acdSLuis R. Rodriguez return 0; 2118b8295acdSLuis R. Rodriguez } 2119b8295acdSLuis R. Rodriguez 2120b8295acdSLuis R. Rodriguez /* Intersection requires a bit more work */ 2121b8295acdSLuis R. Rodriguez 21227db90f4aSLuis R. Rodriguez if (last_request->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE) { 2123b8295acdSLuis R. Rodriguez 21249c96477dSLuis R. Rodriguez intersected_rd = regdom_intersect(rd, cfg80211_regdomain); 21259c96477dSLuis R. Rodriguez if (!intersected_rd) 21269c96477dSLuis R. Rodriguez return -EINVAL; 2127b8295acdSLuis R. Rodriguez 2128fb1fc7adSLuis R. Rodriguez /* 2129fb1fc7adSLuis R. Rodriguez * We can trash what CRDA provided now. 21303e0c3ff3SLuis R. Rodriguez * However if a driver requested this specific regulatory 2131fb1fc7adSLuis R. Rodriguez * domain we keep it for its private use 2132fb1fc7adSLuis R. Rodriguez */ 21337db90f4aSLuis R. Rodriguez if (last_request->initiator == NL80211_REGDOM_SET_BY_DRIVER) 2134806a9e39SLuis R. Rodriguez request_wiphy->regd = rd; 21353e0c3ff3SLuis R. Rodriguez else 21369c96477dSLuis R. Rodriguez kfree(rd); 21373e0c3ff3SLuis R. Rodriguez 2138b8295acdSLuis R. Rodriguez rd = NULL; 2139b8295acdSLuis R. Rodriguez 2140b8295acdSLuis R. Rodriguez reset_regdomains(); 2141b8295acdSLuis R. Rodriguez cfg80211_regdomain = intersected_rd; 2142b8295acdSLuis R. Rodriguez 2143b8295acdSLuis R. Rodriguez return 0; 21449c96477dSLuis R. Rodriguez } 21459c96477dSLuis R. Rodriguez 21463f2355cbSLuis R. Rodriguez /* 21473f2355cbSLuis R. Rodriguez * Country IE requests are handled a bit differently, we intersect 21483f2355cbSLuis R. Rodriguez * the country IE rd with what CRDA believes that country should have 21493f2355cbSLuis R. Rodriguez */ 21503f2355cbSLuis R. Rodriguez 2151729e9c76SLuis R. Rodriguez /* 2152729e9c76SLuis R. Rodriguez * Userspace could have sent two replies with only 2153729e9c76SLuis R. Rodriguez * one kernel request. By the second reply we would have 2154729e9c76SLuis R. Rodriguez * already processed and consumed the country_ie_regdomain. 2155729e9c76SLuis R. Rodriguez */ 2156729e9c76SLuis R. Rodriguez if (!country_ie_regdomain) 2157729e9c76SLuis R. Rodriguez return -EALREADY; 215886f04680SLuis R. Rodriguez BUG_ON(rd == country_ie_regdomain); 21593f2355cbSLuis R. Rodriguez 2160fb1fc7adSLuis R. Rodriguez /* 2161fb1fc7adSLuis R. Rodriguez * Intersect what CRDA returned and our what we 2162fb1fc7adSLuis R. Rodriguez * had built from the Country IE received 2163fb1fc7adSLuis R. Rodriguez */ 21643f2355cbSLuis R. Rodriguez 21653f2355cbSLuis R. Rodriguez intersected_rd = regdom_intersect(rd, country_ie_regdomain); 21663f2355cbSLuis R. Rodriguez 216786f04680SLuis R. Rodriguez reg_country_ie_process_debug(rd, 216886f04680SLuis R. Rodriguez country_ie_regdomain, 21693f2355cbSLuis R. Rodriguez intersected_rd); 21703f2355cbSLuis R. Rodriguez 21713f2355cbSLuis R. Rodriguez kfree(country_ie_regdomain); 21723f2355cbSLuis R. Rodriguez country_ie_regdomain = NULL; 21733f2355cbSLuis R. Rodriguez 21743f2355cbSLuis R. Rodriguez if (!intersected_rd) 21753f2355cbSLuis R. Rodriguez return -EINVAL; 21763f2355cbSLuis R. Rodriguez 217779c97e97SJohannes Berg rdev = wiphy_to_dev(request_wiphy); 21783f2355cbSLuis R. Rodriguez 217979c97e97SJohannes Berg rdev->country_ie_alpha2[0] = rd->alpha2[0]; 218079c97e97SJohannes Berg rdev->country_ie_alpha2[1] = rd->alpha2[1]; 218179c97e97SJohannes Berg rdev->env = last_request->country_ie_env; 21823f2355cbSLuis R. Rodriguez 21833f2355cbSLuis R. Rodriguez BUG_ON(intersected_rd == rd); 21843f2355cbSLuis R. Rodriguez 21853f2355cbSLuis R. Rodriguez kfree(rd); 21863f2355cbSLuis R. Rodriguez rd = NULL; 21873f2355cbSLuis R. Rodriguez 2188b8295acdSLuis R. Rodriguez reset_regdomains(); 21893f2355cbSLuis R. Rodriguez cfg80211_regdomain = intersected_rd; 2190b2e1b302SLuis R. Rodriguez 2191b2e1b302SLuis R. Rodriguez return 0; 2192b2e1b302SLuis R. Rodriguez } 2193b2e1b302SLuis R. Rodriguez 2194b2e1b302SLuis R. Rodriguez 2195fb1fc7adSLuis R. Rodriguez /* 2196fb1fc7adSLuis R. Rodriguez * Use this call to set the current regulatory domain. Conflicts with 2197b2e1b302SLuis R. Rodriguez * multiple drivers can be ironed out later. Caller must've already 2198fb1fc7adSLuis R. Rodriguez * kmalloc'd the rd structure. Caller must hold cfg80211_mutex 2199fb1fc7adSLuis R. Rodriguez */ 2200a3d2eaf0SJohannes Berg int set_regdom(const struct ieee80211_regdomain *rd) 2201b2e1b302SLuis R. Rodriguez { 2202b2e1b302SLuis R. Rodriguez int r; 2203b2e1b302SLuis R. Rodriguez 2204761cf7ecSLuis R. Rodriguez assert_cfg80211_lock(); 2205761cf7ecSLuis R. Rodriguez 2206abc7381bSLuis R. Rodriguez mutex_lock(®_mutex); 2207abc7381bSLuis R. Rodriguez 2208b2e1b302SLuis R. Rodriguez /* Note that this doesn't update the wiphys, this is done below */ 2209b2e1b302SLuis R. Rodriguez r = __set_regdom(rd); 2210d2372b31SJohannes Berg if (r) { 2211d2372b31SJohannes Berg kfree(rd); 2212abc7381bSLuis R. Rodriguez mutex_unlock(®_mutex); 2213b2e1b302SLuis R. Rodriguez return r; 2214d2372b31SJohannes Berg } 2215b2e1b302SLuis R. Rodriguez 2216b2e1b302SLuis R. Rodriguez /* This would make this whole thing pointless */ 2217a01ddafdSLuis R. Rodriguez if (!last_request->intersect) 2218b2e1b302SLuis R. Rodriguez BUG_ON(rd != cfg80211_regdomain); 2219b2e1b302SLuis R. Rodriguez 2220b2e1b302SLuis R. Rodriguez /* update all wiphys now with the new established regulatory domain */ 2221f6037d09SJohannes Berg update_all_wiphy_regulatory(last_request->initiator); 2222b2e1b302SLuis R. Rodriguez 2223a01ddafdSLuis R. Rodriguez print_regdomain(cfg80211_regdomain); 2224b2e1b302SLuis R. Rodriguez 222573d54c9eSLuis R. Rodriguez nl80211_send_reg_change_event(last_request); 222673d54c9eSLuis R. Rodriguez 2227abc7381bSLuis R. Rodriguez mutex_unlock(®_mutex); 2228abc7381bSLuis R. Rodriguez 2229b2e1b302SLuis R. Rodriguez return r; 2230b2e1b302SLuis R. Rodriguez } 2231b2e1b302SLuis R. Rodriguez 2232a1794390SLuis R. Rodriguez /* Caller must hold cfg80211_mutex */ 22333f2355cbSLuis R. Rodriguez void reg_device_remove(struct wiphy *wiphy) 22343f2355cbSLuis R. Rodriguez { 22350ad8acafSLuis R. Rodriguez struct wiphy *request_wiphy = NULL; 2236806a9e39SLuis R. Rodriguez 2237761cf7ecSLuis R. Rodriguez assert_cfg80211_lock(); 2238761cf7ecSLuis R. Rodriguez 2239abc7381bSLuis R. Rodriguez mutex_lock(®_mutex); 2240abc7381bSLuis R. Rodriguez 22410ef9ccddSChris Wright kfree(wiphy->regd); 22420ef9ccddSChris Wright 22430ad8acafSLuis R. Rodriguez if (last_request) 2244806a9e39SLuis R. Rodriguez request_wiphy = wiphy_idx_to_wiphy(last_request->wiphy_idx); 2245806a9e39SLuis R. Rodriguez 22460ef9ccddSChris Wright if (!request_wiphy || request_wiphy != wiphy) 2247abc7381bSLuis R. Rodriguez goto out; 22480ef9ccddSChris Wright 2249806a9e39SLuis R. Rodriguez last_request->wiphy_idx = WIPHY_IDX_STALE; 22503f2355cbSLuis R. Rodriguez last_request->country_ie_env = ENVIRON_ANY; 2251abc7381bSLuis R. Rodriguez out: 2252abc7381bSLuis R. Rodriguez mutex_unlock(®_mutex); 22533f2355cbSLuis R. Rodriguez } 22543f2355cbSLuis R. Rodriguez 2255b2e1b302SLuis R. Rodriguez int regulatory_init(void) 2256b2e1b302SLuis R. Rodriguez { 2257bcf4f99bSLuis R. Rodriguez int err = 0; 2258734366deSJohannes Berg 2259b2e1b302SLuis R. Rodriguez reg_pdev = platform_device_register_simple("regulatory", 0, NULL, 0); 2260b2e1b302SLuis R. Rodriguez if (IS_ERR(reg_pdev)) 2261b2e1b302SLuis R. Rodriguez return PTR_ERR(reg_pdev); 2262734366deSJohannes Berg 2263fe33eb39SLuis R. Rodriguez spin_lock_init(®_requests_lock); 2264e38f8a7aSLuis R. Rodriguez spin_lock_init(®_pending_beacons_lock); 2265fe33eb39SLuis R. Rodriguez 2266734366deSJohannes Berg #ifdef CONFIG_WIRELESS_OLD_REGULATORY 2267a3d2eaf0SJohannes Berg cfg80211_regdomain = static_regdom(ieee80211_regdom); 2268734366deSJohannes Berg 2269942b25cfSJohannes Berg printk(KERN_INFO "cfg80211: Using static regulatory domain info\n"); 2270734366deSJohannes Berg print_regdomain_info(cfg80211_regdomain); 2271734366deSJohannes Berg #else 2272a3d2eaf0SJohannes Berg cfg80211_regdomain = cfg80211_world_regdom; 2273734366deSJohannes Berg 2274734366deSJohannes Berg #endif 2275ae9e4b0dSLuis R. Rodriguez /* We always try to get an update for the static regdomain */ 2276ae9e4b0dSLuis R. Rodriguez err = regulatory_hint_core(cfg80211_regdomain->alpha2); 2277bcf4f99bSLuis R. Rodriguez if (err) { 2278bcf4f99bSLuis R. Rodriguez if (err == -ENOMEM) 2279bcf4f99bSLuis R. Rodriguez return err; 2280bcf4f99bSLuis R. Rodriguez /* 2281bcf4f99bSLuis R. Rodriguez * N.B. kobject_uevent_env() can fail mainly for when we're out 2282bcf4f99bSLuis R. Rodriguez * memory which is handled and propagated appropriately above 2283bcf4f99bSLuis R. Rodriguez * but it can also fail during a netlink_broadcast() or during 2284bcf4f99bSLuis R. Rodriguez * early boot for call_usermodehelper(). For now treat these 2285bcf4f99bSLuis R. Rodriguez * errors as non-fatal. 2286bcf4f99bSLuis R. Rodriguez */ 2287bcf4f99bSLuis R. Rodriguez printk(KERN_ERR "cfg80211: kobject_uevent_env() was unable " 2288bcf4f99bSLuis R. Rodriguez "to call CRDA during init"); 2289bcf4f99bSLuis R. Rodriguez #ifdef CONFIG_CFG80211_REG_DEBUG 2290bcf4f99bSLuis R. Rodriguez /* We want to find out exactly why when debugging */ 2291bcf4f99bSLuis R. Rodriguez WARN_ON(err); 2292bcf4f99bSLuis R. Rodriguez #endif 2293bcf4f99bSLuis R. Rodriguez } 2294734366deSJohannes Berg 2295ae9e4b0dSLuis R. Rodriguez /* 2296ae9e4b0dSLuis R. Rodriguez * Finally, if the user set the module parameter treat it 2297ae9e4b0dSLuis R. Rodriguez * as a user hint. 2298ae9e4b0dSLuis R. Rodriguez */ 2299ae9e4b0dSLuis R. Rodriguez if (!is_world_regdom(ieee80211_regdom)) 2300ae9e4b0dSLuis R. Rodriguez regulatory_hint_user(ieee80211_regdom); 2301ae9e4b0dSLuis R. Rodriguez 2302b2e1b302SLuis R. Rodriguez return 0; 2303b2e1b302SLuis R. Rodriguez } 2304b2e1b302SLuis R. Rodriguez 2305b2e1b302SLuis R. Rodriguez void regulatory_exit(void) 2306b2e1b302SLuis R. Rodriguez { 2307fe33eb39SLuis R. Rodriguez struct regulatory_request *reg_request, *tmp; 2308e38f8a7aSLuis R. Rodriguez struct reg_beacon *reg_beacon, *btmp; 2309fe33eb39SLuis R. Rodriguez 2310fe33eb39SLuis R. Rodriguez cancel_work_sync(®_work); 2311fe33eb39SLuis R. Rodriguez 2312a1794390SLuis R. Rodriguez mutex_lock(&cfg80211_mutex); 2313abc7381bSLuis R. Rodriguez mutex_lock(®_mutex); 2314734366deSJohannes Berg 2315b2e1b302SLuis R. Rodriguez reset_regdomains(); 2316734366deSJohannes Berg 23173f2355cbSLuis R. Rodriguez kfree(country_ie_regdomain); 23183f2355cbSLuis R. Rodriguez country_ie_regdomain = NULL; 23193f2355cbSLuis R. Rodriguez 2320f6037d09SJohannes Berg kfree(last_request); 2321f6037d09SJohannes Berg 2322b2e1b302SLuis R. Rodriguez platform_device_unregister(reg_pdev); 2323734366deSJohannes Berg 2324e38f8a7aSLuis R. Rodriguez spin_lock_bh(®_pending_beacons_lock); 2325e38f8a7aSLuis R. Rodriguez if (!list_empty(®_pending_beacons)) { 2326e38f8a7aSLuis R. Rodriguez list_for_each_entry_safe(reg_beacon, btmp, 2327e38f8a7aSLuis R. Rodriguez ®_pending_beacons, list) { 2328e38f8a7aSLuis R. Rodriguez list_del(®_beacon->list); 2329e38f8a7aSLuis R. Rodriguez kfree(reg_beacon); 2330e38f8a7aSLuis R. Rodriguez } 2331e38f8a7aSLuis R. Rodriguez } 2332e38f8a7aSLuis R. Rodriguez spin_unlock_bh(®_pending_beacons_lock); 2333e38f8a7aSLuis R. Rodriguez 2334e38f8a7aSLuis R. Rodriguez if (!list_empty(®_beacon_list)) { 2335e38f8a7aSLuis R. Rodriguez list_for_each_entry_safe(reg_beacon, btmp, 2336e38f8a7aSLuis R. Rodriguez ®_beacon_list, list) { 2337e38f8a7aSLuis R. Rodriguez list_del(®_beacon->list); 2338e38f8a7aSLuis R. Rodriguez kfree(reg_beacon); 2339e38f8a7aSLuis R. Rodriguez } 2340e38f8a7aSLuis R. Rodriguez } 2341e38f8a7aSLuis R. Rodriguez 2342fe33eb39SLuis R. Rodriguez spin_lock(®_requests_lock); 2343fe33eb39SLuis R. Rodriguez if (!list_empty(®_requests_list)) { 2344fe33eb39SLuis R. Rodriguez list_for_each_entry_safe(reg_request, tmp, 2345fe33eb39SLuis R. Rodriguez ®_requests_list, list) { 2346fe33eb39SLuis R. Rodriguez list_del(®_request->list); 2347fe33eb39SLuis R. Rodriguez kfree(reg_request); 2348fe33eb39SLuis R. Rodriguez } 2349fe33eb39SLuis R. Rodriguez } 2350fe33eb39SLuis R. Rodriguez spin_unlock(®_requests_lock); 2351fe33eb39SLuis R. Rodriguez 2352abc7381bSLuis R. Rodriguez mutex_unlock(®_mutex); 2353a1794390SLuis R. Rodriguez mutex_unlock(&cfg80211_mutex); 23548318d78aSJohannes Berg } 2355