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 65e38f8a7aSLuis R. Rodriguez /* Used to queue up regulatory hints */ 66fe33eb39SLuis R. Rodriguez static LIST_HEAD(reg_requests_list); 67fe33eb39SLuis R. Rodriguez static spinlock_t reg_requests_lock; 68fe33eb39SLuis R. Rodriguez 69e38f8a7aSLuis R. Rodriguez /* Used to queue up beacon hints for review */ 70e38f8a7aSLuis R. Rodriguez static LIST_HEAD(reg_pending_beacons); 71e38f8a7aSLuis R. Rodriguez static spinlock_t reg_pending_beacons_lock; 72e38f8a7aSLuis R. Rodriguez 73e38f8a7aSLuis R. Rodriguez /* Used to keep track of processed beacon hints */ 74e38f8a7aSLuis R. Rodriguez static LIST_HEAD(reg_beacon_list); 75e38f8a7aSLuis R. Rodriguez 76e38f8a7aSLuis R. Rodriguez struct reg_beacon { 77e38f8a7aSLuis R. Rodriguez struct list_head list; 78e38f8a7aSLuis R. Rodriguez struct ieee80211_channel chan; 79e38f8a7aSLuis R. Rodriguez }; 80e38f8a7aSLuis R. Rodriguez 81734366deSJohannes Berg /* We keep a static world regulatory domain in case of the absence of CRDA */ 82734366deSJohannes Berg static const struct ieee80211_regdomain world_regdom = { 83611b6a82SLuis R. Rodriguez .n_reg_rules = 5, 84734366deSJohannes Berg .alpha2 = "00", 85734366deSJohannes Berg .reg_rules = { 8668798a62SLuis R. Rodriguez /* IEEE 802.11b/g, channels 1..11 */ 8768798a62SLuis R. Rodriguez REG_RULE(2412-10, 2462+10, 40, 6, 20, 0), 88611b6a82SLuis R. Rodriguez /* IEEE 802.11b/g, channels 12..13. No HT40 89611b6a82SLuis R. Rodriguez * channel fits here. */ 90611b6a82SLuis R. Rodriguez REG_RULE(2467-10, 2472+10, 20, 6, 20, 91611b6a82SLuis R. Rodriguez NL80211_RRF_PASSIVE_SCAN | 92611b6a82SLuis R. Rodriguez NL80211_RRF_NO_IBSS), 93611b6a82SLuis R. Rodriguez /* IEEE 802.11 channel 14 - Only JP enables 94611b6a82SLuis R. Rodriguez * this and for 802.11b only */ 95611b6a82SLuis R. Rodriguez REG_RULE(2484-10, 2484+10, 20, 6, 20, 96611b6a82SLuis R. Rodriguez NL80211_RRF_PASSIVE_SCAN | 97611b6a82SLuis R. Rodriguez NL80211_RRF_NO_IBSS | 98611b6a82SLuis R. Rodriguez NL80211_RRF_NO_OFDM), 993fc71f77SLuis R. Rodriguez /* IEEE 802.11a, channel 36..48 */ 100ec329aceSLuis R. Rodriguez REG_RULE(5180-10, 5240+10, 40, 6, 20, 1013fc71f77SLuis R. Rodriguez NL80211_RRF_PASSIVE_SCAN | 1023fc71f77SLuis R. Rodriguez NL80211_RRF_NO_IBSS), 1033fc71f77SLuis R. Rodriguez 1043fc71f77SLuis R. Rodriguez /* NB: 5260 MHz - 5700 MHz requies DFS */ 1053fc71f77SLuis R. Rodriguez 1063fc71f77SLuis R. Rodriguez /* IEEE 802.11a, channel 149..165 */ 107ec329aceSLuis R. Rodriguez REG_RULE(5745-10, 5825+10, 40, 6, 20, 1083fc71f77SLuis R. Rodriguez NL80211_RRF_PASSIVE_SCAN | 1093fc71f77SLuis R. Rodriguez NL80211_RRF_NO_IBSS), 110734366deSJohannes Berg } 111734366deSJohannes Berg }; 112734366deSJohannes Berg 113a3d2eaf0SJohannes Berg static const struct ieee80211_regdomain *cfg80211_world_regdom = 114a3d2eaf0SJohannes Berg &world_regdom; 115734366deSJohannes Berg 116734366deSJohannes Berg #ifdef CONFIG_WIRELESS_OLD_REGULATORY 117734366deSJohannes Berg static char *ieee80211_regdom = "US"; 1186ee7d330SLuis R. Rodriguez #else 1196ee7d330SLuis R. Rodriguez static char *ieee80211_regdom = "00"; 1206ee7d330SLuis R. Rodriguez #endif 1216ee7d330SLuis R. Rodriguez 122734366deSJohannes Berg module_param(ieee80211_regdom, charp, 0444); 123734366deSJohannes Berg MODULE_PARM_DESC(ieee80211_regdom, "IEEE 802.11 regulatory domain code"); 124734366deSJohannes Berg 1256ee7d330SLuis R. Rodriguez #ifdef CONFIG_WIRELESS_OLD_REGULATORY 126fb1fc7adSLuis R. Rodriguez /* 127fb1fc7adSLuis R. Rodriguez * We assume 40 MHz bandwidth for the old regulatory work. 128734366deSJohannes Berg * We make emphasis we are using the exact same frequencies 129fb1fc7adSLuis R. Rodriguez * as before 130fb1fc7adSLuis R. Rodriguez */ 131734366deSJohannes Berg 132734366deSJohannes Berg static const struct ieee80211_regdomain us_regdom = { 133734366deSJohannes Berg .n_reg_rules = 6, 134734366deSJohannes Berg .alpha2 = "US", 135734366deSJohannes Berg .reg_rules = { 136734366deSJohannes Berg /* IEEE 802.11b/g, channels 1..11 */ 137734366deSJohannes Berg REG_RULE(2412-10, 2462+10, 40, 6, 27, 0), 138734366deSJohannes Berg /* IEEE 802.11a, channel 36 */ 139734366deSJohannes Berg REG_RULE(5180-10, 5180+10, 40, 6, 23, 0), 140734366deSJohannes Berg /* IEEE 802.11a, channel 40 */ 141734366deSJohannes Berg REG_RULE(5200-10, 5200+10, 40, 6, 23, 0), 142734366deSJohannes Berg /* IEEE 802.11a, channel 44 */ 143734366deSJohannes Berg REG_RULE(5220-10, 5220+10, 40, 6, 23, 0), 144734366deSJohannes Berg /* IEEE 802.11a, channels 48..64 */ 145734366deSJohannes Berg REG_RULE(5240-10, 5320+10, 40, 6, 23, 0), 146734366deSJohannes Berg /* IEEE 802.11a, channels 149..165, outdoor */ 147734366deSJohannes Berg REG_RULE(5745-10, 5825+10, 40, 6, 30, 0), 148734366deSJohannes Berg } 149734366deSJohannes Berg }; 150734366deSJohannes Berg 151734366deSJohannes Berg static const struct ieee80211_regdomain jp_regdom = { 152734366deSJohannes Berg .n_reg_rules = 3, 153734366deSJohannes Berg .alpha2 = "JP", 154734366deSJohannes Berg .reg_rules = { 155734366deSJohannes Berg /* IEEE 802.11b/g, channels 1..14 */ 156734366deSJohannes Berg REG_RULE(2412-10, 2484+10, 40, 6, 20, 0), 157734366deSJohannes Berg /* IEEE 802.11a, channels 34..48 */ 158734366deSJohannes Berg REG_RULE(5170-10, 5240+10, 40, 6, 20, 159734366deSJohannes Berg NL80211_RRF_PASSIVE_SCAN), 160734366deSJohannes Berg /* IEEE 802.11a, channels 52..64 */ 161734366deSJohannes Berg REG_RULE(5260-10, 5320+10, 40, 6, 20, 162734366deSJohannes Berg NL80211_RRF_NO_IBSS | 163734366deSJohannes Berg NL80211_RRF_DFS), 164734366deSJohannes Berg } 165734366deSJohannes Berg }; 166734366deSJohannes Berg 167734366deSJohannes Berg static const struct ieee80211_regdomain eu_regdom = { 168734366deSJohannes Berg .n_reg_rules = 6, 169fb1fc7adSLuis R. Rodriguez /* 170fb1fc7adSLuis R. Rodriguez * This alpha2 is bogus, we leave it here just for stupid 171fb1fc7adSLuis R. Rodriguez * backward compatibility 172fb1fc7adSLuis R. Rodriguez */ 173734366deSJohannes Berg .alpha2 = "EU", 174734366deSJohannes Berg .reg_rules = { 175734366deSJohannes Berg /* IEEE 802.11b/g, channels 1..13 */ 176734366deSJohannes Berg REG_RULE(2412-10, 2472+10, 40, 6, 20, 0), 177734366deSJohannes Berg /* IEEE 802.11a, channel 36 */ 178734366deSJohannes Berg REG_RULE(5180-10, 5180+10, 40, 6, 23, 179734366deSJohannes Berg NL80211_RRF_PASSIVE_SCAN), 180734366deSJohannes Berg /* IEEE 802.11a, channel 40 */ 181734366deSJohannes Berg REG_RULE(5200-10, 5200+10, 40, 6, 23, 182734366deSJohannes Berg NL80211_RRF_PASSIVE_SCAN), 183734366deSJohannes Berg /* IEEE 802.11a, channel 44 */ 184734366deSJohannes Berg REG_RULE(5220-10, 5220+10, 40, 6, 23, 185734366deSJohannes Berg NL80211_RRF_PASSIVE_SCAN), 186734366deSJohannes Berg /* IEEE 802.11a, channels 48..64 */ 187734366deSJohannes Berg REG_RULE(5240-10, 5320+10, 40, 6, 20, 188734366deSJohannes Berg NL80211_RRF_NO_IBSS | 189734366deSJohannes Berg NL80211_RRF_DFS), 190734366deSJohannes Berg /* IEEE 802.11a, channels 100..140 */ 191734366deSJohannes Berg REG_RULE(5500-10, 5700+10, 40, 6, 30, 192734366deSJohannes Berg NL80211_RRF_NO_IBSS | 193734366deSJohannes Berg NL80211_RRF_DFS), 194734366deSJohannes Berg } 195734366deSJohannes Berg }; 196734366deSJohannes Berg 197734366deSJohannes Berg static const struct ieee80211_regdomain *static_regdom(char *alpha2) 198734366deSJohannes Berg { 199734366deSJohannes Berg if (alpha2[0] == 'U' && alpha2[1] == 'S') 200734366deSJohannes Berg return &us_regdom; 201734366deSJohannes Berg if (alpha2[0] == 'J' && alpha2[1] == 'P') 202734366deSJohannes Berg return &jp_regdom; 203734366deSJohannes Berg if (alpha2[0] == 'E' && alpha2[1] == 'U') 204734366deSJohannes Berg return &eu_regdom; 205734366deSJohannes Berg /* Default, as per the old rules */ 206734366deSJohannes Berg return &us_regdom; 207734366deSJohannes Berg } 208734366deSJohannes Berg 209a3d2eaf0SJohannes Berg static bool is_old_static_regdom(const struct ieee80211_regdomain *rd) 210734366deSJohannes Berg { 211734366deSJohannes Berg if (rd == &us_regdom || rd == &jp_regdom || rd == &eu_regdom) 212734366deSJohannes Berg return true; 213734366deSJohannes Berg return false; 214734366deSJohannes Berg } 215734366deSJohannes Berg #else 216942b25cfSJohannes Berg static inline bool is_old_static_regdom(const struct ieee80211_regdomain *rd) 217942b25cfSJohannes Berg { 218942b25cfSJohannes Berg return false; 219942b25cfSJohannes Berg } 220942b25cfSJohannes Berg #endif 221942b25cfSJohannes Berg 222734366deSJohannes Berg static void reset_regdomains(void) 223734366deSJohannes Berg { 224942b25cfSJohannes Berg /* avoid freeing static information or freeing something twice */ 225942b25cfSJohannes Berg if (cfg80211_regdomain == cfg80211_world_regdom) 226942b25cfSJohannes Berg cfg80211_regdomain = NULL; 227942b25cfSJohannes Berg if (cfg80211_world_regdom == &world_regdom) 228942b25cfSJohannes Berg cfg80211_world_regdom = NULL; 229942b25cfSJohannes Berg if (cfg80211_regdomain == &world_regdom) 230942b25cfSJohannes Berg cfg80211_regdomain = NULL; 231942b25cfSJohannes Berg if (is_old_static_regdom(cfg80211_regdomain)) 232942b25cfSJohannes Berg cfg80211_regdomain = NULL; 233942b25cfSJohannes Berg 234734366deSJohannes Berg kfree(cfg80211_regdomain); 235734366deSJohannes Berg kfree(cfg80211_world_regdom); 236734366deSJohannes Berg 237a3d2eaf0SJohannes Berg cfg80211_world_regdom = &world_regdom; 238734366deSJohannes Berg cfg80211_regdomain = NULL; 239734366deSJohannes Berg } 240734366deSJohannes Berg 241fb1fc7adSLuis R. Rodriguez /* 242fb1fc7adSLuis R. Rodriguez * Dynamic world regulatory domain requested by the wireless 243fb1fc7adSLuis R. Rodriguez * core upon initialization 244fb1fc7adSLuis R. Rodriguez */ 245a3d2eaf0SJohannes Berg static void update_world_regdomain(const struct ieee80211_regdomain *rd) 246734366deSJohannes Berg { 247f6037d09SJohannes Berg BUG_ON(!last_request); 248734366deSJohannes Berg 249734366deSJohannes Berg reset_regdomains(); 250734366deSJohannes Berg 251734366deSJohannes Berg cfg80211_world_regdom = rd; 252734366deSJohannes Berg cfg80211_regdomain = rd; 253734366deSJohannes Berg } 254734366deSJohannes Berg 255a3d2eaf0SJohannes Berg bool is_world_regdom(const char *alpha2) 256b2e1b302SLuis R. Rodriguez { 257b2e1b302SLuis R. Rodriguez if (!alpha2) 258b2e1b302SLuis R. Rodriguez return false; 259b2e1b302SLuis R. Rodriguez if (alpha2[0] == '0' && alpha2[1] == '0') 260b2e1b302SLuis R. Rodriguez return true; 261b2e1b302SLuis R. Rodriguez return false; 262b2e1b302SLuis R. Rodriguez } 263b2e1b302SLuis R. Rodriguez 264a3d2eaf0SJohannes Berg static bool is_alpha2_set(const char *alpha2) 265b2e1b302SLuis R. Rodriguez { 266b2e1b302SLuis R. Rodriguez if (!alpha2) 267b2e1b302SLuis R. Rodriguez return false; 268b2e1b302SLuis R. Rodriguez if (alpha2[0] != 0 && alpha2[1] != 0) 269b2e1b302SLuis R. Rodriguez return true; 270b2e1b302SLuis R. Rodriguez return false; 271b2e1b302SLuis R. Rodriguez } 272b2e1b302SLuis R. Rodriguez 273b2e1b302SLuis R. Rodriguez static bool is_alpha_upper(char letter) 274b2e1b302SLuis R. Rodriguez { 275b2e1b302SLuis R. Rodriguez /* ASCII A - Z */ 276b2e1b302SLuis R. Rodriguez if (letter >= 65 && letter <= 90) 277b2e1b302SLuis R. Rodriguez return true; 278b2e1b302SLuis R. Rodriguez return false; 279b2e1b302SLuis R. Rodriguez } 280b2e1b302SLuis R. Rodriguez 281a3d2eaf0SJohannes Berg static bool is_unknown_alpha2(const char *alpha2) 282b2e1b302SLuis R. Rodriguez { 283b2e1b302SLuis R. Rodriguez if (!alpha2) 284b2e1b302SLuis R. Rodriguez return false; 285fb1fc7adSLuis R. Rodriguez /* 286fb1fc7adSLuis R. Rodriguez * Special case where regulatory domain was built by driver 287fb1fc7adSLuis R. Rodriguez * but a specific alpha2 cannot be determined 288fb1fc7adSLuis R. Rodriguez */ 289b2e1b302SLuis R. Rodriguez if (alpha2[0] == '9' && alpha2[1] == '9') 290b2e1b302SLuis R. Rodriguez return true; 291b2e1b302SLuis R. Rodriguez return false; 292b2e1b302SLuis R. Rodriguez } 293b2e1b302SLuis R. Rodriguez 2943f2355cbSLuis R. Rodriguez static bool is_intersected_alpha2(const char *alpha2) 2953f2355cbSLuis R. Rodriguez { 2963f2355cbSLuis R. Rodriguez if (!alpha2) 2973f2355cbSLuis R. Rodriguez return false; 298fb1fc7adSLuis R. Rodriguez /* 299fb1fc7adSLuis R. Rodriguez * Special case where regulatory domain is the 3003f2355cbSLuis R. Rodriguez * result of an intersection between two regulatory domain 301fb1fc7adSLuis R. Rodriguez * structures 302fb1fc7adSLuis R. Rodriguez */ 3033f2355cbSLuis R. Rodriguez if (alpha2[0] == '9' && alpha2[1] == '8') 3043f2355cbSLuis R. Rodriguez return true; 3053f2355cbSLuis R. Rodriguez return false; 3063f2355cbSLuis R. Rodriguez } 3073f2355cbSLuis R. Rodriguez 308a3d2eaf0SJohannes Berg static bool is_an_alpha2(const char *alpha2) 309b2e1b302SLuis R. Rodriguez { 310b2e1b302SLuis R. Rodriguez if (!alpha2) 311b2e1b302SLuis R. Rodriguez return false; 312b2e1b302SLuis R. Rodriguez if (is_alpha_upper(alpha2[0]) && is_alpha_upper(alpha2[1])) 313b2e1b302SLuis R. Rodriguez return true; 314b2e1b302SLuis R. Rodriguez return false; 315b2e1b302SLuis R. Rodriguez } 316b2e1b302SLuis R. Rodriguez 317a3d2eaf0SJohannes Berg static bool alpha2_equal(const char *alpha2_x, const char *alpha2_y) 318b2e1b302SLuis R. Rodriguez { 319b2e1b302SLuis R. Rodriguez if (!alpha2_x || !alpha2_y) 320b2e1b302SLuis R. Rodriguez return false; 321b2e1b302SLuis R. Rodriguez if (alpha2_x[0] == alpha2_y[0] && 322b2e1b302SLuis R. Rodriguez alpha2_x[1] == alpha2_y[1]) 323b2e1b302SLuis R. Rodriguez return true; 324b2e1b302SLuis R. Rodriguez return false; 325b2e1b302SLuis R. Rodriguez } 326b2e1b302SLuis R. Rodriguez 32769b1572bSLuis R. Rodriguez static bool regdom_changes(const char *alpha2) 328b2e1b302SLuis R. Rodriguez { 329761cf7ecSLuis R. Rodriguez assert_cfg80211_lock(); 330761cf7ecSLuis R. Rodriguez 331b2e1b302SLuis R. Rodriguez if (!cfg80211_regdomain) 332b2e1b302SLuis R. Rodriguez return true; 333b2e1b302SLuis R. Rodriguez if (alpha2_equal(cfg80211_regdomain->alpha2, alpha2)) 334b2e1b302SLuis R. Rodriguez return false; 335b2e1b302SLuis R. Rodriguez return true; 336b2e1b302SLuis R. Rodriguez } 337b2e1b302SLuis R. Rodriguez 3383f2355cbSLuis R. Rodriguez /** 3393f2355cbSLuis R. Rodriguez * country_ie_integrity_changes - tells us if the country IE has changed 3403f2355cbSLuis R. Rodriguez * @checksum: checksum of country IE of fields we are interested in 3413f2355cbSLuis R. Rodriguez * 3423f2355cbSLuis R. Rodriguez * If the country IE has not changed you can ignore it safely. This is 3433f2355cbSLuis R. Rodriguez * useful to determine if two devices are seeing two different country IEs 3443f2355cbSLuis R. Rodriguez * even on the same alpha2. Note that this will return false if no IE has 3453f2355cbSLuis R. Rodriguez * been set on the wireless core yet. 3463f2355cbSLuis R. Rodriguez */ 3473f2355cbSLuis R. Rodriguez static bool country_ie_integrity_changes(u32 checksum) 3483f2355cbSLuis R. Rodriguez { 3493f2355cbSLuis R. Rodriguez /* If no IE has been set then the checksum doesn't change */ 3503f2355cbSLuis R. Rodriguez if (unlikely(!last_request->country_ie_checksum)) 3513f2355cbSLuis R. Rodriguez return false; 3523f2355cbSLuis R. Rodriguez if (unlikely(last_request->country_ie_checksum != checksum)) 3533f2355cbSLuis R. Rodriguez return true; 3543f2355cbSLuis R. Rodriguez return false; 3553f2355cbSLuis R. Rodriguez } 3563f2355cbSLuis R. Rodriguez 357fb1fc7adSLuis R. Rodriguez /* 358fb1fc7adSLuis R. Rodriguez * This lets us keep regulatory code which is updated on a regulatory 359fb1fc7adSLuis R. Rodriguez * basis in userspace. 360fb1fc7adSLuis R. Rodriguez */ 361b2e1b302SLuis R. Rodriguez static int call_crda(const char *alpha2) 362b2e1b302SLuis R. Rodriguez { 363b2e1b302SLuis R. Rodriguez char country_env[9 + 2] = "COUNTRY="; 364b2e1b302SLuis R. Rodriguez char *envp[] = { 365b2e1b302SLuis R. Rodriguez country_env, 366b2e1b302SLuis R. Rodriguez NULL 3678318d78aSJohannes Berg }; 3688318d78aSJohannes Berg 369b2e1b302SLuis R. Rodriguez if (!is_world_regdom((char *) alpha2)) 370b2e1b302SLuis R. Rodriguez printk(KERN_INFO "cfg80211: Calling CRDA for country: %c%c\n", 371b2e1b302SLuis R. Rodriguez alpha2[0], alpha2[1]); 372b2e1b302SLuis R. Rodriguez else 373b2e1b302SLuis R. Rodriguez printk(KERN_INFO "cfg80211: Calling CRDA to update world " 374b2e1b302SLuis R. Rodriguez "regulatory domain\n"); 3758318d78aSJohannes Berg 376b2e1b302SLuis R. Rodriguez country_env[8] = alpha2[0]; 377b2e1b302SLuis R. Rodriguez country_env[9] = alpha2[1]; 3788318d78aSJohannes Berg 379b2e1b302SLuis R. Rodriguez return kobject_uevent_env(®_pdev->dev.kobj, KOBJ_CHANGE, envp); 380b2e1b302SLuis R. Rodriguez } 381b2e1b302SLuis R. Rodriguez 382b2e1b302SLuis R. Rodriguez /* Used by nl80211 before kmalloc'ing our regulatory domain */ 383a3d2eaf0SJohannes Berg bool reg_is_valid_request(const char *alpha2) 384b2e1b302SLuis R. Rodriguez { 385f6037d09SJohannes Berg if (!last_request) 386f6037d09SJohannes Berg return false; 387f6037d09SJohannes Berg 388f6037d09SJohannes Berg return alpha2_equal(last_request->alpha2, alpha2); 389b2e1b302SLuis R. Rodriguez } 390b2e1b302SLuis R. Rodriguez 391b2e1b302SLuis R. Rodriguez /* Sanity check on a regulatory rule */ 392a3d2eaf0SJohannes Berg static bool is_valid_reg_rule(const struct ieee80211_reg_rule *rule) 393b2e1b302SLuis R. Rodriguez { 394a3d2eaf0SJohannes Berg const struct ieee80211_freq_range *freq_range = &rule->freq_range; 395b2e1b302SLuis R. Rodriguez u32 freq_diff; 396b2e1b302SLuis R. Rodriguez 39791e99004SLuis R. Rodriguez if (freq_range->start_freq_khz <= 0 || freq_range->end_freq_khz <= 0) 398b2e1b302SLuis R. Rodriguez return false; 399b2e1b302SLuis R. Rodriguez 400b2e1b302SLuis R. Rodriguez if (freq_range->start_freq_khz > freq_range->end_freq_khz) 401b2e1b302SLuis R. Rodriguez return false; 402b2e1b302SLuis R. Rodriguez 403b2e1b302SLuis R. Rodriguez freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz; 404b2e1b302SLuis R. Rodriguez 405bd05f28eSRoel Kluin if (freq_range->end_freq_khz <= freq_range->start_freq_khz || 406bd05f28eSRoel Kluin freq_range->max_bandwidth_khz > freq_diff) 407b2e1b302SLuis R. Rodriguez return false; 408b2e1b302SLuis R. Rodriguez 409b2e1b302SLuis R. Rodriguez return true; 410b2e1b302SLuis R. Rodriguez } 411b2e1b302SLuis R. Rodriguez 412a3d2eaf0SJohannes Berg static bool is_valid_rd(const struct ieee80211_regdomain *rd) 413b2e1b302SLuis R. Rodriguez { 414a3d2eaf0SJohannes Berg const struct ieee80211_reg_rule *reg_rule = NULL; 415b2e1b302SLuis R. Rodriguez unsigned int i; 416b2e1b302SLuis R. Rodriguez 417b2e1b302SLuis R. Rodriguez if (!rd->n_reg_rules) 418b2e1b302SLuis R. Rodriguez return false; 419b2e1b302SLuis R. Rodriguez 42088dc1c3fSLuis R. Rodriguez if (WARN_ON(rd->n_reg_rules > NL80211_MAX_SUPP_REG_RULES)) 42188dc1c3fSLuis R. Rodriguez return false; 42288dc1c3fSLuis R. Rodriguez 423b2e1b302SLuis R. Rodriguez for (i = 0; i < rd->n_reg_rules; i++) { 424b2e1b302SLuis R. Rodriguez reg_rule = &rd->reg_rules[i]; 425b2e1b302SLuis R. Rodriguez if (!is_valid_reg_rule(reg_rule)) 426b2e1b302SLuis R. Rodriguez return false; 427b2e1b302SLuis R. Rodriguez } 428b2e1b302SLuis R. Rodriguez 429b2e1b302SLuis R. Rodriguez return true; 430b2e1b302SLuis R. Rodriguez } 431b2e1b302SLuis R. Rodriguez 432038659e7SLuis R. Rodriguez static bool reg_does_bw_fit(const struct ieee80211_freq_range *freq_range, 433038659e7SLuis R. Rodriguez u32 center_freq_khz, 434038659e7SLuis R. Rodriguez u32 bw_khz) 435b2e1b302SLuis R. Rodriguez { 436038659e7SLuis R. Rodriguez u32 start_freq_khz, end_freq_khz; 437038659e7SLuis R. Rodriguez 438038659e7SLuis R. Rodriguez start_freq_khz = center_freq_khz - (bw_khz/2); 439038659e7SLuis R. Rodriguez end_freq_khz = center_freq_khz + (bw_khz/2); 440038659e7SLuis R. Rodriguez 441b2e1b302SLuis R. Rodriguez if (start_freq_khz >= freq_range->start_freq_khz && 442b2e1b302SLuis R. Rodriguez end_freq_khz <= freq_range->end_freq_khz) 443038659e7SLuis R. Rodriguez return true; 444038659e7SLuis R. Rodriguez 445038659e7SLuis R. Rodriguez return false; 446b2e1b302SLuis R. Rodriguez } 447b2e1b302SLuis R. Rodriguez 4480c7dc45dSLuis R. Rodriguez /** 4490c7dc45dSLuis R. Rodriguez * freq_in_rule_band - tells us if a frequency is in a frequency band 4500c7dc45dSLuis R. Rodriguez * @freq_range: frequency rule we want to query 4510c7dc45dSLuis R. Rodriguez * @freq_khz: frequency we are inquiring about 4520c7dc45dSLuis R. Rodriguez * 4530c7dc45dSLuis R. Rodriguez * This lets us know if a specific frequency rule is or is not relevant to 4540c7dc45dSLuis R. Rodriguez * a specific frequency's band. Bands are device specific and artificial 4550c7dc45dSLuis R. Rodriguez * definitions (the "2.4 GHz band" and the "5 GHz band"), however it is 4560c7dc45dSLuis R. Rodriguez * safe for now to assume that a frequency rule should not be part of a 4570c7dc45dSLuis R. Rodriguez * frequency's band if the start freq or end freq are off by more than 2 GHz. 4580c7dc45dSLuis R. Rodriguez * This resolution can be lowered and should be considered as we add 4590c7dc45dSLuis R. Rodriguez * regulatory rule support for other "bands". 4600c7dc45dSLuis R. Rodriguez **/ 4610c7dc45dSLuis R. Rodriguez static bool freq_in_rule_band(const struct ieee80211_freq_range *freq_range, 4620c7dc45dSLuis R. Rodriguez u32 freq_khz) 4630c7dc45dSLuis R. Rodriguez { 4640c7dc45dSLuis R. Rodriguez #define ONE_GHZ_IN_KHZ 1000000 4650c7dc45dSLuis R. Rodriguez if (abs(freq_khz - freq_range->start_freq_khz) <= (2 * ONE_GHZ_IN_KHZ)) 4660c7dc45dSLuis R. Rodriguez return true; 4670c7dc45dSLuis R. Rodriguez if (abs(freq_khz - freq_range->end_freq_khz) <= (2 * ONE_GHZ_IN_KHZ)) 4680c7dc45dSLuis R. Rodriguez return true; 4690c7dc45dSLuis R. Rodriguez return false; 4700c7dc45dSLuis R. Rodriguez #undef ONE_GHZ_IN_KHZ 4710c7dc45dSLuis R. Rodriguez } 4720c7dc45dSLuis R. Rodriguez 473fb1fc7adSLuis R. Rodriguez /* 474fb1fc7adSLuis R. Rodriguez * Converts a country IE to a regulatory domain. A regulatory domain 4753f2355cbSLuis R. Rodriguez * structure has a lot of information which the IE doesn't yet have, 4763f2355cbSLuis R. Rodriguez * so for the other values we use upper max values as we will intersect 477fb1fc7adSLuis R. Rodriguez * with our userspace regulatory agent to get lower bounds. 478fb1fc7adSLuis R. Rodriguez */ 4793f2355cbSLuis R. Rodriguez static struct ieee80211_regdomain *country_ie_2_rd( 4803f2355cbSLuis R. Rodriguez u8 *country_ie, 4813f2355cbSLuis R. Rodriguez u8 country_ie_len, 4823f2355cbSLuis R. Rodriguez u32 *checksum) 4833f2355cbSLuis R. Rodriguez { 4843f2355cbSLuis R. Rodriguez struct ieee80211_regdomain *rd = NULL; 4853f2355cbSLuis R. Rodriguez unsigned int i = 0; 4863f2355cbSLuis R. Rodriguez char alpha2[2]; 4873f2355cbSLuis R. Rodriguez u32 flags = 0; 4883f2355cbSLuis R. Rodriguez u32 num_rules = 0, size_of_regd = 0; 4893f2355cbSLuis R. Rodriguez u8 *triplets_start = NULL; 4903f2355cbSLuis R. Rodriguez u8 len_at_triplet = 0; 4913f2355cbSLuis R. Rodriguez /* the last channel we have registered in a subband (triplet) */ 4923f2355cbSLuis R. Rodriguez int last_sub_max_channel = 0; 4933f2355cbSLuis R. Rodriguez 4943f2355cbSLuis R. Rodriguez *checksum = 0xDEADBEEF; 4953f2355cbSLuis R. Rodriguez 4963f2355cbSLuis R. Rodriguez /* Country IE requirements */ 4973f2355cbSLuis R. Rodriguez BUG_ON(country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN || 4983f2355cbSLuis R. Rodriguez country_ie_len & 0x01); 4993f2355cbSLuis R. Rodriguez 5003f2355cbSLuis R. Rodriguez alpha2[0] = country_ie[0]; 5013f2355cbSLuis R. Rodriguez alpha2[1] = country_ie[1]; 5023f2355cbSLuis R. Rodriguez 5033f2355cbSLuis R. Rodriguez /* 5043f2355cbSLuis R. Rodriguez * Third octet can be: 5053f2355cbSLuis R. Rodriguez * 'I' - Indoor 5063f2355cbSLuis R. Rodriguez * 'O' - Outdoor 5073f2355cbSLuis R. Rodriguez * 5083f2355cbSLuis R. Rodriguez * anything else we assume is no restrictions 5093f2355cbSLuis R. Rodriguez */ 5103f2355cbSLuis R. Rodriguez if (country_ie[2] == 'I') 5113f2355cbSLuis R. Rodriguez flags = NL80211_RRF_NO_OUTDOOR; 5123f2355cbSLuis R. Rodriguez else if (country_ie[2] == 'O') 5133f2355cbSLuis R. Rodriguez flags = NL80211_RRF_NO_INDOOR; 5143f2355cbSLuis R. Rodriguez 5153f2355cbSLuis R. Rodriguez country_ie += 3; 5163f2355cbSLuis R. Rodriguez country_ie_len -= 3; 5173f2355cbSLuis R. Rodriguez 5183f2355cbSLuis R. Rodriguez triplets_start = country_ie; 5193f2355cbSLuis R. Rodriguez len_at_triplet = country_ie_len; 5203f2355cbSLuis R. Rodriguez 5213f2355cbSLuis R. Rodriguez *checksum ^= ((flags ^ alpha2[0] ^ alpha2[1]) << 8); 5223f2355cbSLuis R. Rodriguez 523fb1fc7adSLuis R. Rodriguez /* 524fb1fc7adSLuis R. Rodriguez * We need to build a reg rule for each triplet, but first we must 5253f2355cbSLuis R. Rodriguez * calculate the number of reg rules we will need. We will need one 526fb1fc7adSLuis R. Rodriguez * for each channel subband 527fb1fc7adSLuis R. Rodriguez */ 5283f2355cbSLuis R. Rodriguez while (country_ie_len >= 3) { 529615aab4bSLuis R. Rodriguez int end_channel = 0; 5303f2355cbSLuis R. Rodriguez struct ieee80211_country_ie_triplet *triplet = 5313f2355cbSLuis R. Rodriguez (struct ieee80211_country_ie_triplet *) country_ie; 5323f2355cbSLuis R. Rodriguez int cur_sub_max_channel = 0, cur_channel = 0; 5333f2355cbSLuis R. Rodriguez 5343f2355cbSLuis R. Rodriguez if (triplet->ext.reg_extension_id >= 5353f2355cbSLuis R. Rodriguez IEEE80211_COUNTRY_EXTENSION_ID) { 5363f2355cbSLuis R. Rodriguez country_ie += 3; 5373f2355cbSLuis R. Rodriguez country_ie_len -= 3; 5383f2355cbSLuis R. Rodriguez continue; 5393f2355cbSLuis R. Rodriguez } 5403f2355cbSLuis R. Rodriguez 541615aab4bSLuis R. Rodriguez /* 2 GHz */ 542615aab4bSLuis R. Rodriguez if (triplet->chans.first_channel <= 14) 543615aab4bSLuis R. Rodriguez end_channel = triplet->chans.first_channel + 544615aab4bSLuis R. Rodriguez triplet->chans.num_channels; 545615aab4bSLuis R. Rodriguez else 546615aab4bSLuis R. Rodriguez /* 547615aab4bSLuis R. Rodriguez * 5 GHz -- For example in country IEs if the first 548615aab4bSLuis R. Rodriguez * channel given is 36 and the number of channels is 4 549615aab4bSLuis R. Rodriguez * then the individual channel numbers defined for the 550615aab4bSLuis R. Rodriguez * 5 GHz PHY by these parameters are: 36, 40, 44, and 48 551615aab4bSLuis R. Rodriguez * and not 36, 37, 38, 39. 552615aab4bSLuis R. Rodriguez * 553615aab4bSLuis R. Rodriguez * See: http://tinyurl.com/11d-clarification 554615aab4bSLuis R. Rodriguez */ 555615aab4bSLuis R. Rodriguez end_channel = triplet->chans.first_channel + 556615aab4bSLuis R. Rodriguez (4 * (triplet->chans.num_channels - 1)); 557615aab4bSLuis R. Rodriguez 5583f2355cbSLuis R. Rodriguez cur_channel = triplet->chans.first_channel; 559615aab4bSLuis R. Rodriguez cur_sub_max_channel = end_channel; 5603f2355cbSLuis R. Rodriguez 5613f2355cbSLuis R. Rodriguez /* Basic sanity check */ 5623f2355cbSLuis R. Rodriguez if (cur_sub_max_channel < cur_channel) 5633f2355cbSLuis R. Rodriguez return NULL; 5643f2355cbSLuis R. Rodriguez 565fb1fc7adSLuis R. Rodriguez /* 566fb1fc7adSLuis R. Rodriguez * Do not allow overlapping channels. Also channels 5673f2355cbSLuis R. Rodriguez * passed in each subband must be monotonically 568fb1fc7adSLuis R. Rodriguez * increasing 569fb1fc7adSLuis R. Rodriguez */ 5703f2355cbSLuis R. Rodriguez if (last_sub_max_channel) { 5713f2355cbSLuis R. Rodriguez if (cur_channel <= last_sub_max_channel) 5723f2355cbSLuis R. Rodriguez return NULL; 5733f2355cbSLuis R. Rodriguez if (cur_sub_max_channel <= last_sub_max_channel) 5743f2355cbSLuis R. Rodriguez return NULL; 5753f2355cbSLuis R. Rodriguez } 5763f2355cbSLuis R. Rodriguez 577fb1fc7adSLuis R. Rodriguez /* 578fb1fc7adSLuis R. Rodriguez * When dot11RegulatoryClassesRequired is supported 5793f2355cbSLuis R. Rodriguez * we can throw ext triplets as part of this soup, 5803f2355cbSLuis R. Rodriguez * for now we don't care when those change as we 581fb1fc7adSLuis R. Rodriguez * don't support them 582fb1fc7adSLuis R. Rodriguez */ 5833f2355cbSLuis R. Rodriguez *checksum ^= ((cur_channel ^ cur_sub_max_channel) << 8) | 5843f2355cbSLuis R. Rodriguez ((cur_sub_max_channel ^ cur_sub_max_channel) << 16) | 5853f2355cbSLuis R. Rodriguez ((triplet->chans.max_power ^ cur_sub_max_channel) << 24); 5863f2355cbSLuis R. Rodriguez 5873f2355cbSLuis R. Rodriguez last_sub_max_channel = cur_sub_max_channel; 5883f2355cbSLuis R. Rodriguez 5893f2355cbSLuis R. Rodriguez country_ie += 3; 5903f2355cbSLuis R. Rodriguez country_ie_len -= 3; 5913f2355cbSLuis R. Rodriguez num_rules++; 5923f2355cbSLuis R. Rodriguez 593fb1fc7adSLuis R. Rodriguez /* 594fb1fc7adSLuis R. Rodriguez * Note: this is not a IEEE requirement but 595fb1fc7adSLuis R. Rodriguez * simply a memory requirement 596fb1fc7adSLuis R. Rodriguez */ 5973f2355cbSLuis R. Rodriguez if (num_rules > NL80211_MAX_SUPP_REG_RULES) 5983f2355cbSLuis R. Rodriguez return NULL; 5993f2355cbSLuis R. Rodriguez } 6003f2355cbSLuis R. Rodriguez 6013f2355cbSLuis R. Rodriguez country_ie = triplets_start; 6023f2355cbSLuis R. Rodriguez country_ie_len = len_at_triplet; 6033f2355cbSLuis R. Rodriguez 6043f2355cbSLuis R. Rodriguez size_of_regd = sizeof(struct ieee80211_regdomain) + 6053f2355cbSLuis R. Rodriguez (num_rules * sizeof(struct ieee80211_reg_rule)); 6063f2355cbSLuis R. Rodriguez 6073f2355cbSLuis R. Rodriguez rd = kzalloc(size_of_regd, GFP_KERNEL); 6083f2355cbSLuis R. Rodriguez if (!rd) 6093f2355cbSLuis R. Rodriguez return NULL; 6103f2355cbSLuis R. Rodriguez 6113f2355cbSLuis R. Rodriguez rd->n_reg_rules = num_rules; 6123f2355cbSLuis R. Rodriguez rd->alpha2[0] = alpha2[0]; 6133f2355cbSLuis R. Rodriguez rd->alpha2[1] = alpha2[1]; 6143f2355cbSLuis R. Rodriguez 6153f2355cbSLuis R. Rodriguez /* This time around we fill in the rd */ 6163f2355cbSLuis R. Rodriguez while (country_ie_len >= 3) { 61702e68a3dSLuis R. Rodriguez int end_channel = 0; 6183f2355cbSLuis R. Rodriguez struct ieee80211_country_ie_triplet *triplet = 6193f2355cbSLuis R. Rodriguez (struct ieee80211_country_ie_triplet *) country_ie; 6203f2355cbSLuis R. Rodriguez struct ieee80211_reg_rule *reg_rule = NULL; 6213f2355cbSLuis R. Rodriguez struct ieee80211_freq_range *freq_range = NULL; 6223f2355cbSLuis R. Rodriguez struct ieee80211_power_rule *power_rule = NULL; 6233f2355cbSLuis R. Rodriguez 624fb1fc7adSLuis R. Rodriguez /* 625fb1fc7adSLuis R. Rodriguez * Must parse if dot11RegulatoryClassesRequired is true, 626fb1fc7adSLuis R. Rodriguez * we don't support this yet 627fb1fc7adSLuis R. Rodriguez */ 6283f2355cbSLuis R. Rodriguez if (triplet->ext.reg_extension_id >= 6293f2355cbSLuis R. Rodriguez IEEE80211_COUNTRY_EXTENSION_ID) { 6303f2355cbSLuis R. Rodriguez country_ie += 3; 6313f2355cbSLuis R. Rodriguez country_ie_len -= 3; 6323f2355cbSLuis R. Rodriguez continue; 6333f2355cbSLuis R. Rodriguez } 6343f2355cbSLuis R. Rodriguez 6353f2355cbSLuis R. Rodriguez reg_rule = &rd->reg_rules[i]; 6363f2355cbSLuis R. Rodriguez freq_range = ®_rule->freq_range; 6373f2355cbSLuis R. Rodriguez power_rule = ®_rule->power_rule; 6383f2355cbSLuis R. Rodriguez 6393f2355cbSLuis R. Rodriguez reg_rule->flags = flags; 6403f2355cbSLuis R. Rodriguez 64102e68a3dSLuis R. Rodriguez /* 2 GHz */ 64202e68a3dSLuis R. Rodriguez if (triplet->chans.first_channel <= 14) 64302e68a3dSLuis R. Rodriguez end_channel = triplet->chans.first_channel + 64402e68a3dSLuis R. Rodriguez triplet->chans.num_channels; 64502e68a3dSLuis R. Rodriguez else 64602e68a3dSLuis R. Rodriguez end_channel = triplet->chans.first_channel + 64702e68a3dSLuis R. Rodriguez (4 * (triplet->chans.num_channels - 1)); 64802e68a3dSLuis R. Rodriguez 649fb1fc7adSLuis R. Rodriguez /* 650fb1fc7adSLuis R. Rodriguez * The +10 is since the regulatory domain expects 6513f2355cbSLuis R. Rodriguez * the actual band edge, not the center of freq for 6523f2355cbSLuis R. Rodriguez * its start and end freqs, assuming 20 MHz bandwidth on 653fb1fc7adSLuis R. Rodriguez * the channels passed 654fb1fc7adSLuis R. Rodriguez */ 6553f2355cbSLuis R. Rodriguez freq_range->start_freq_khz = 6563f2355cbSLuis R. Rodriguez MHZ_TO_KHZ(ieee80211_channel_to_frequency( 6573f2355cbSLuis R. Rodriguez triplet->chans.first_channel) - 10); 6583f2355cbSLuis R. Rodriguez freq_range->end_freq_khz = 6593f2355cbSLuis R. Rodriguez MHZ_TO_KHZ(ieee80211_channel_to_frequency( 66002e68a3dSLuis R. Rodriguez end_channel) + 10); 6613f2355cbSLuis R. Rodriguez 662fb1fc7adSLuis R. Rodriguez /* 663fb1fc7adSLuis R. Rodriguez * These are large arbitrary values we use to intersect later. 664fb1fc7adSLuis R. Rodriguez * Increment this if we ever support >= 40 MHz channels 665fb1fc7adSLuis R. Rodriguez * in IEEE 802.11 666fb1fc7adSLuis R. Rodriguez */ 6673f2355cbSLuis R. Rodriguez freq_range->max_bandwidth_khz = MHZ_TO_KHZ(40); 6683f2355cbSLuis R. Rodriguez power_rule->max_antenna_gain = DBI_TO_MBI(100); 6693f2355cbSLuis R. Rodriguez power_rule->max_eirp = DBM_TO_MBM(100); 6703f2355cbSLuis R. Rodriguez 6713f2355cbSLuis R. Rodriguez country_ie += 3; 6723f2355cbSLuis R. Rodriguez country_ie_len -= 3; 6733f2355cbSLuis R. Rodriguez i++; 6743f2355cbSLuis R. Rodriguez 6753f2355cbSLuis R. Rodriguez BUG_ON(i > NL80211_MAX_SUPP_REG_RULES); 6763f2355cbSLuis R. Rodriguez } 6773f2355cbSLuis R. Rodriguez 6783f2355cbSLuis R. Rodriguez return rd; 6793f2355cbSLuis R. Rodriguez } 6803f2355cbSLuis R. Rodriguez 6813f2355cbSLuis R. Rodriguez 682fb1fc7adSLuis R. Rodriguez /* 683fb1fc7adSLuis R. Rodriguez * Helper for regdom_intersect(), this does the real 684fb1fc7adSLuis R. Rodriguez * mathematical intersection fun 685fb1fc7adSLuis R. Rodriguez */ 6869c96477dSLuis R. Rodriguez static int reg_rules_intersect( 6879c96477dSLuis R. Rodriguez const struct ieee80211_reg_rule *rule1, 6889c96477dSLuis R. Rodriguez const struct ieee80211_reg_rule *rule2, 6899c96477dSLuis R. Rodriguez struct ieee80211_reg_rule *intersected_rule) 6909c96477dSLuis R. Rodriguez { 6919c96477dSLuis R. Rodriguez const struct ieee80211_freq_range *freq_range1, *freq_range2; 6929c96477dSLuis R. Rodriguez struct ieee80211_freq_range *freq_range; 6939c96477dSLuis R. Rodriguez const struct ieee80211_power_rule *power_rule1, *power_rule2; 6949c96477dSLuis R. Rodriguez struct ieee80211_power_rule *power_rule; 6959c96477dSLuis R. Rodriguez u32 freq_diff; 6969c96477dSLuis R. Rodriguez 6979c96477dSLuis R. Rodriguez freq_range1 = &rule1->freq_range; 6989c96477dSLuis R. Rodriguez freq_range2 = &rule2->freq_range; 6999c96477dSLuis R. Rodriguez freq_range = &intersected_rule->freq_range; 7009c96477dSLuis R. Rodriguez 7019c96477dSLuis R. Rodriguez power_rule1 = &rule1->power_rule; 7029c96477dSLuis R. Rodriguez power_rule2 = &rule2->power_rule; 7039c96477dSLuis R. Rodriguez power_rule = &intersected_rule->power_rule; 7049c96477dSLuis R. Rodriguez 7059c96477dSLuis R. Rodriguez freq_range->start_freq_khz = max(freq_range1->start_freq_khz, 7069c96477dSLuis R. Rodriguez freq_range2->start_freq_khz); 7079c96477dSLuis R. Rodriguez freq_range->end_freq_khz = min(freq_range1->end_freq_khz, 7089c96477dSLuis R. Rodriguez freq_range2->end_freq_khz); 7099c96477dSLuis R. Rodriguez freq_range->max_bandwidth_khz = min(freq_range1->max_bandwidth_khz, 7109c96477dSLuis R. Rodriguez freq_range2->max_bandwidth_khz); 7119c96477dSLuis R. Rodriguez 7129c96477dSLuis R. Rodriguez freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz; 7139c96477dSLuis R. Rodriguez if (freq_range->max_bandwidth_khz > freq_diff) 7149c96477dSLuis R. Rodriguez freq_range->max_bandwidth_khz = freq_diff; 7159c96477dSLuis R. Rodriguez 7169c96477dSLuis R. Rodriguez power_rule->max_eirp = min(power_rule1->max_eirp, 7179c96477dSLuis R. Rodriguez power_rule2->max_eirp); 7189c96477dSLuis R. Rodriguez power_rule->max_antenna_gain = min(power_rule1->max_antenna_gain, 7199c96477dSLuis R. Rodriguez power_rule2->max_antenna_gain); 7209c96477dSLuis R. Rodriguez 7219c96477dSLuis R. Rodriguez intersected_rule->flags = (rule1->flags | rule2->flags); 7229c96477dSLuis R. Rodriguez 7239c96477dSLuis R. Rodriguez if (!is_valid_reg_rule(intersected_rule)) 7249c96477dSLuis R. Rodriguez return -EINVAL; 7259c96477dSLuis R. Rodriguez 7269c96477dSLuis R. Rodriguez return 0; 7279c96477dSLuis R. Rodriguez } 7289c96477dSLuis R. Rodriguez 7299c96477dSLuis R. Rodriguez /** 7309c96477dSLuis R. Rodriguez * regdom_intersect - do the intersection between two regulatory domains 7319c96477dSLuis R. Rodriguez * @rd1: first regulatory domain 7329c96477dSLuis R. Rodriguez * @rd2: second regulatory domain 7339c96477dSLuis R. Rodriguez * 7349c96477dSLuis R. Rodriguez * Use this function to get the intersection between two regulatory domains. 7359c96477dSLuis R. Rodriguez * Once completed we will mark the alpha2 for the rd as intersected, "98", 7369c96477dSLuis R. Rodriguez * as no one single alpha2 can represent this regulatory domain. 7379c96477dSLuis R. Rodriguez * 7389c96477dSLuis R. Rodriguez * Returns a pointer to the regulatory domain structure which will hold the 7399c96477dSLuis R. Rodriguez * resulting intersection of rules between rd1 and rd2. We will 7409c96477dSLuis R. Rodriguez * kzalloc() this structure for you. 7419c96477dSLuis R. Rodriguez */ 7429c96477dSLuis R. Rodriguez static struct ieee80211_regdomain *regdom_intersect( 7439c96477dSLuis R. Rodriguez const struct ieee80211_regdomain *rd1, 7449c96477dSLuis R. Rodriguez const struct ieee80211_regdomain *rd2) 7459c96477dSLuis R. Rodriguez { 7469c96477dSLuis R. Rodriguez int r, size_of_regd; 7479c96477dSLuis R. Rodriguez unsigned int x, y; 7489c96477dSLuis R. Rodriguez unsigned int num_rules = 0, rule_idx = 0; 7499c96477dSLuis R. Rodriguez const struct ieee80211_reg_rule *rule1, *rule2; 7509c96477dSLuis R. Rodriguez struct ieee80211_reg_rule *intersected_rule; 7519c96477dSLuis R. Rodriguez struct ieee80211_regdomain *rd; 7529c96477dSLuis R. Rodriguez /* This is just a dummy holder to help us count */ 7539c96477dSLuis R. Rodriguez struct ieee80211_reg_rule irule; 7549c96477dSLuis R. Rodriguez 7559c96477dSLuis R. Rodriguez /* Uses the stack temporarily for counter arithmetic */ 7569c96477dSLuis R. Rodriguez intersected_rule = &irule; 7579c96477dSLuis R. Rodriguez 7589c96477dSLuis R. Rodriguez memset(intersected_rule, 0, sizeof(struct ieee80211_reg_rule)); 7599c96477dSLuis R. Rodriguez 7609c96477dSLuis R. Rodriguez if (!rd1 || !rd2) 7619c96477dSLuis R. Rodriguez return NULL; 7629c96477dSLuis R. Rodriguez 763fb1fc7adSLuis R. Rodriguez /* 764fb1fc7adSLuis R. Rodriguez * First we get a count of the rules we'll need, then we actually 7659c96477dSLuis R. Rodriguez * build them. This is to so we can malloc() and free() a 7669c96477dSLuis R. Rodriguez * regdomain once. The reason we use reg_rules_intersect() here 7679c96477dSLuis R. Rodriguez * is it will return -EINVAL if the rule computed makes no sense. 768fb1fc7adSLuis R. Rodriguez * All rules that do check out OK are valid. 769fb1fc7adSLuis R. Rodriguez */ 7709c96477dSLuis R. Rodriguez 7719c96477dSLuis R. Rodriguez for (x = 0; x < rd1->n_reg_rules; x++) { 7729c96477dSLuis R. Rodriguez rule1 = &rd1->reg_rules[x]; 7739c96477dSLuis R. Rodriguez for (y = 0; y < rd2->n_reg_rules; y++) { 7749c96477dSLuis R. Rodriguez rule2 = &rd2->reg_rules[y]; 7759c96477dSLuis R. Rodriguez if (!reg_rules_intersect(rule1, rule2, 7769c96477dSLuis R. Rodriguez intersected_rule)) 7779c96477dSLuis R. Rodriguez num_rules++; 7789c96477dSLuis R. Rodriguez memset(intersected_rule, 0, 7799c96477dSLuis R. Rodriguez sizeof(struct ieee80211_reg_rule)); 7809c96477dSLuis R. Rodriguez } 7819c96477dSLuis R. Rodriguez } 7829c96477dSLuis R. Rodriguez 7839c96477dSLuis R. Rodriguez if (!num_rules) 7849c96477dSLuis R. Rodriguez return NULL; 7859c96477dSLuis R. Rodriguez 7869c96477dSLuis R. Rodriguez size_of_regd = sizeof(struct ieee80211_regdomain) + 7879c96477dSLuis R. Rodriguez ((num_rules + 1) * sizeof(struct ieee80211_reg_rule)); 7889c96477dSLuis R. Rodriguez 7899c96477dSLuis R. Rodriguez rd = kzalloc(size_of_regd, GFP_KERNEL); 7909c96477dSLuis R. Rodriguez if (!rd) 7919c96477dSLuis R. Rodriguez return NULL; 7929c96477dSLuis R. Rodriguez 7939c96477dSLuis R. Rodriguez for (x = 0; x < rd1->n_reg_rules; x++) { 7949c96477dSLuis R. Rodriguez rule1 = &rd1->reg_rules[x]; 7959c96477dSLuis R. Rodriguez for (y = 0; y < rd2->n_reg_rules; y++) { 7969c96477dSLuis R. Rodriguez rule2 = &rd2->reg_rules[y]; 797fb1fc7adSLuis R. Rodriguez /* 798fb1fc7adSLuis R. Rodriguez * This time around instead of using the stack lets 7999c96477dSLuis R. Rodriguez * write to the target rule directly saving ourselves 800fb1fc7adSLuis R. Rodriguez * a memcpy() 801fb1fc7adSLuis R. Rodriguez */ 8029c96477dSLuis R. Rodriguez intersected_rule = &rd->reg_rules[rule_idx]; 8039c96477dSLuis R. Rodriguez r = reg_rules_intersect(rule1, rule2, 8049c96477dSLuis R. Rodriguez intersected_rule); 805fb1fc7adSLuis R. Rodriguez /* 806fb1fc7adSLuis R. Rodriguez * No need to memset here the intersected rule here as 807fb1fc7adSLuis R. Rodriguez * we're not using the stack anymore 808fb1fc7adSLuis R. Rodriguez */ 8099c96477dSLuis R. Rodriguez if (r) 8109c96477dSLuis R. Rodriguez continue; 8119c96477dSLuis R. Rodriguez rule_idx++; 8129c96477dSLuis R. Rodriguez } 8139c96477dSLuis R. Rodriguez } 8149c96477dSLuis R. Rodriguez 8159c96477dSLuis R. Rodriguez if (rule_idx != num_rules) { 8169c96477dSLuis R. Rodriguez kfree(rd); 8179c96477dSLuis R. Rodriguez return NULL; 8189c96477dSLuis R. Rodriguez } 8199c96477dSLuis R. Rodriguez 8209c96477dSLuis R. Rodriguez rd->n_reg_rules = num_rules; 8219c96477dSLuis R. Rodriguez rd->alpha2[0] = '9'; 8229c96477dSLuis R. Rodriguez rd->alpha2[1] = '8'; 8239c96477dSLuis R. Rodriguez 8249c96477dSLuis R. Rodriguez return rd; 8259c96477dSLuis R. Rodriguez } 8269c96477dSLuis R. Rodriguez 827fb1fc7adSLuis R. Rodriguez /* 828fb1fc7adSLuis R. Rodriguez * XXX: add support for the rest of enum nl80211_reg_rule_flags, we may 829fb1fc7adSLuis R. Rodriguez * want to just have the channel structure use these 830fb1fc7adSLuis R. Rodriguez */ 831b2e1b302SLuis R. Rodriguez static u32 map_regdom_flags(u32 rd_flags) 832b2e1b302SLuis R. Rodriguez { 833b2e1b302SLuis R. Rodriguez u32 channel_flags = 0; 834b2e1b302SLuis R. Rodriguez if (rd_flags & NL80211_RRF_PASSIVE_SCAN) 835b2e1b302SLuis R. Rodriguez channel_flags |= IEEE80211_CHAN_PASSIVE_SCAN; 836b2e1b302SLuis R. Rodriguez if (rd_flags & NL80211_RRF_NO_IBSS) 837b2e1b302SLuis R. Rodriguez channel_flags |= IEEE80211_CHAN_NO_IBSS; 838b2e1b302SLuis R. Rodriguez if (rd_flags & NL80211_RRF_DFS) 839b2e1b302SLuis R. Rodriguez channel_flags |= IEEE80211_CHAN_RADAR; 840b2e1b302SLuis R. Rodriguez return channel_flags; 841b2e1b302SLuis R. Rodriguez } 842b2e1b302SLuis R. Rodriguez 8431fa25e41SLuis R. Rodriguez static int freq_reg_info_regd(struct wiphy *wiphy, 8441fa25e41SLuis R. Rodriguez u32 center_freq, 845038659e7SLuis R. Rodriguez u32 desired_bw_khz, 8461fa25e41SLuis R. Rodriguez const struct ieee80211_reg_rule **reg_rule, 8471fa25e41SLuis R. Rodriguez const struct ieee80211_regdomain *custom_regd) 8488318d78aSJohannes Berg { 8498318d78aSJohannes Berg int i; 8500c7dc45dSLuis R. Rodriguez bool band_rule_found = false; 8513e0c3ff3SLuis R. Rodriguez const struct ieee80211_regdomain *regd; 852038659e7SLuis R. Rodriguez bool bw_fits = false; 853038659e7SLuis R. Rodriguez 854038659e7SLuis R. Rodriguez if (!desired_bw_khz) 855038659e7SLuis R. Rodriguez desired_bw_khz = MHZ_TO_KHZ(20); 8568318d78aSJohannes Berg 8571fa25e41SLuis R. Rodriguez regd = custom_regd ? custom_regd : cfg80211_regdomain; 8583e0c3ff3SLuis R. Rodriguez 859fb1fc7adSLuis R. Rodriguez /* 860fb1fc7adSLuis R. Rodriguez * Follow the driver's regulatory domain, if present, unless a country 861fb1fc7adSLuis R. Rodriguez * IE has been processed or a user wants to help complaince further 862fb1fc7adSLuis R. Rodriguez */ 8637db90f4aSLuis R. Rodriguez if (last_request->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && 8647db90f4aSLuis R. Rodriguez last_request->initiator != NL80211_REGDOM_SET_BY_USER && 8653e0c3ff3SLuis R. Rodriguez wiphy->regd) 8663e0c3ff3SLuis R. Rodriguez regd = wiphy->regd; 8673e0c3ff3SLuis R. Rodriguez 8683e0c3ff3SLuis R. Rodriguez if (!regd) 869b2e1b302SLuis R. Rodriguez return -EINVAL; 870b2e1b302SLuis R. Rodriguez 8713e0c3ff3SLuis R. Rodriguez for (i = 0; i < regd->n_reg_rules; i++) { 872b2e1b302SLuis R. Rodriguez const struct ieee80211_reg_rule *rr; 873b2e1b302SLuis R. Rodriguez const struct ieee80211_freq_range *fr = NULL; 874b2e1b302SLuis R. Rodriguez const struct ieee80211_power_rule *pr = NULL; 875b2e1b302SLuis R. Rodriguez 8763e0c3ff3SLuis R. Rodriguez rr = ®d->reg_rules[i]; 877b2e1b302SLuis R. Rodriguez fr = &rr->freq_range; 878b2e1b302SLuis R. Rodriguez pr = &rr->power_rule; 8790c7dc45dSLuis R. Rodriguez 880fb1fc7adSLuis R. Rodriguez /* 881fb1fc7adSLuis R. Rodriguez * We only need to know if one frequency rule was 8820c7dc45dSLuis R. Rodriguez * was in center_freq's band, that's enough, so lets 883fb1fc7adSLuis R. Rodriguez * not overwrite it once found 884fb1fc7adSLuis R. Rodriguez */ 8850c7dc45dSLuis R. Rodriguez if (!band_rule_found) 8860c7dc45dSLuis R. Rodriguez band_rule_found = freq_in_rule_band(fr, center_freq); 8870c7dc45dSLuis R. Rodriguez 888038659e7SLuis R. Rodriguez bw_fits = reg_does_bw_fit(fr, 889038659e7SLuis R. Rodriguez center_freq, 890038659e7SLuis R. Rodriguez desired_bw_khz); 8910c7dc45dSLuis R. Rodriguez 892038659e7SLuis R. Rodriguez if (band_rule_found && bw_fits) { 893b2e1b302SLuis R. Rodriguez *reg_rule = rr; 894038659e7SLuis R. Rodriguez return 0; 8958318d78aSJohannes Berg } 8968318d78aSJohannes Berg } 8978318d78aSJohannes Berg 8980c7dc45dSLuis R. Rodriguez if (!band_rule_found) 8990c7dc45dSLuis R. Rodriguez return -ERANGE; 9000c7dc45dSLuis R. Rodriguez 901038659e7SLuis R. Rodriguez return -EINVAL; 902b2e1b302SLuis R. Rodriguez } 90334f57347SLuis R. Rodriguez EXPORT_SYMBOL(freq_reg_info); 904b2e1b302SLuis R. Rodriguez 905038659e7SLuis R. Rodriguez int freq_reg_info(struct wiphy *wiphy, 906038659e7SLuis R. Rodriguez u32 center_freq, 907038659e7SLuis R. Rodriguez u32 desired_bw_khz, 9081fa25e41SLuis R. Rodriguez const struct ieee80211_reg_rule **reg_rule) 9091fa25e41SLuis R. Rodriguez { 910ac46d48eSLuis R. Rodriguez assert_cfg80211_lock(); 911038659e7SLuis R. Rodriguez return freq_reg_info_regd(wiphy, 912038659e7SLuis R. Rodriguez center_freq, 913038659e7SLuis R. Rodriguez desired_bw_khz, 914038659e7SLuis R. Rodriguez reg_rule, 915038659e7SLuis R. Rodriguez NULL); 9161fa25e41SLuis R. Rodriguez } 917b2e1b302SLuis R. Rodriguez 918038659e7SLuis R. Rodriguez /* 919038659e7SLuis R. Rodriguez * Note that right now we assume the desired channel bandwidth 920038659e7SLuis R. Rodriguez * is always 20 MHz for each individual channel (HT40 uses 20 MHz 921038659e7SLuis R. Rodriguez * per channel, the primary and the extension channel). To support 922038659e7SLuis R. Rodriguez * smaller custom bandwidths such as 5 MHz or 10 MHz we'll need a 923038659e7SLuis R. Rodriguez * new ieee80211_channel.target_bw and re run the regulatory check 924038659e7SLuis R. Rodriguez * on the wiphy with the target_bw specified. Then we can simply use 925038659e7SLuis R. Rodriguez * that below for the desired_bw_khz below. 926038659e7SLuis R. Rodriguez */ 927a92a3ce7SLuis R. Rodriguez static void handle_channel(struct wiphy *wiphy, enum ieee80211_band band, 928a92a3ce7SLuis R. Rodriguez unsigned int chan_idx) 929b2e1b302SLuis R. Rodriguez { 930b2e1b302SLuis R. Rodriguez int r; 931038659e7SLuis R. Rodriguez u32 flags, bw_flags = 0; 932038659e7SLuis R. Rodriguez u32 desired_bw_khz = MHZ_TO_KHZ(20); 933b2e1b302SLuis R. Rodriguez const struct ieee80211_reg_rule *reg_rule = NULL; 934b2e1b302SLuis R. Rodriguez const struct ieee80211_power_rule *power_rule = NULL; 935038659e7SLuis R. Rodriguez const struct ieee80211_freq_range *freq_range = NULL; 936a92a3ce7SLuis R. Rodriguez struct ieee80211_supported_band *sband; 937a92a3ce7SLuis R. Rodriguez struct ieee80211_channel *chan; 938fe33eb39SLuis R. Rodriguez struct wiphy *request_wiphy = NULL; 939a92a3ce7SLuis R. Rodriguez 940761cf7ecSLuis R. Rodriguez assert_cfg80211_lock(); 941761cf7ecSLuis R. Rodriguez 942806a9e39SLuis R. Rodriguez request_wiphy = wiphy_idx_to_wiphy(last_request->wiphy_idx); 943806a9e39SLuis R. Rodriguez 944a92a3ce7SLuis R. Rodriguez sband = wiphy->bands[band]; 945a92a3ce7SLuis R. Rodriguez BUG_ON(chan_idx >= sband->n_channels); 946a92a3ce7SLuis R. Rodriguez chan = &sband->channels[chan_idx]; 947a92a3ce7SLuis R. Rodriguez 948a92a3ce7SLuis R. Rodriguez flags = chan->orig_flags; 949b2e1b302SLuis R. Rodriguez 950038659e7SLuis R. Rodriguez r = freq_reg_info(wiphy, 951038659e7SLuis R. Rodriguez MHZ_TO_KHZ(chan->center_freq), 952038659e7SLuis R. Rodriguez desired_bw_khz, 953038659e7SLuis R. Rodriguez ®_rule); 954b2e1b302SLuis R. Rodriguez 955b2e1b302SLuis R. Rodriguez if (r) { 956fb1fc7adSLuis R. Rodriguez /* 957fb1fc7adSLuis R. Rodriguez * This means no regulatory rule was found in the country IE 9580c7dc45dSLuis R. Rodriguez * with a frequency range on the center_freq's band, since 9590c7dc45dSLuis R. Rodriguez * IEEE-802.11 allows for a country IE to have a subset of the 9600c7dc45dSLuis R. Rodriguez * regulatory information provided in a country we ignore 9610c7dc45dSLuis R. Rodriguez * disabling the channel unless at least one reg rule was 9620c7dc45dSLuis R. Rodriguez * found on the center_freq's band. For details see this 9630c7dc45dSLuis R. Rodriguez * clarification: 9640c7dc45dSLuis R. Rodriguez * 9650c7dc45dSLuis R. Rodriguez * http://tinyurl.com/11d-clarification 9660c7dc45dSLuis R. Rodriguez */ 9670c7dc45dSLuis R. Rodriguez if (r == -ERANGE && 9687db90f4aSLuis R. Rodriguez last_request->initiator == 9697db90f4aSLuis R. Rodriguez NL80211_REGDOM_SET_BY_COUNTRY_IE) { 9700c7dc45dSLuis R. Rodriguez #ifdef CONFIG_CFG80211_REG_DEBUG 9710c7dc45dSLuis R. Rodriguez printk(KERN_DEBUG "cfg80211: Leaving channel %d MHz " 9720c7dc45dSLuis R. Rodriguez "intact on %s - no rule found in band on " 9730c7dc45dSLuis R. Rodriguez "Country IE\n", 9740c7dc45dSLuis R. Rodriguez chan->center_freq, wiphy_name(wiphy)); 9750c7dc45dSLuis R. Rodriguez #endif 9760c7dc45dSLuis R. Rodriguez } else { 977fb1fc7adSLuis R. Rodriguez /* 978fb1fc7adSLuis R. Rodriguez * In this case we know the country IE has at least one reg rule 979fb1fc7adSLuis R. Rodriguez * for the band so we respect its band definitions 980fb1fc7adSLuis R. Rodriguez */ 9810c7dc45dSLuis R. Rodriguez #ifdef CONFIG_CFG80211_REG_DEBUG 9827db90f4aSLuis R. Rodriguez if (last_request->initiator == 9837db90f4aSLuis R. Rodriguez NL80211_REGDOM_SET_BY_COUNTRY_IE) 9840c7dc45dSLuis R. Rodriguez printk(KERN_DEBUG "cfg80211: Disabling " 9850c7dc45dSLuis R. Rodriguez "channel %d MHz on %s due to " 9860c7dc45dSLuis R. Rodriguez "Country IE\n", 9870c7dc45dSLuis R. Rodriguez chan->center_freq, wiphy_name(wiphy)); 9880c7dc45dSLuis R. Rodriguez #endif 9898318d78aSJohannes Berg flags |= IEEE80211_CHAN_DISABLED; 9908318d78aSJohannes Berg chan->flags = flags; 9910c7dc45dSLuis R. Rodriguez } 9928318d78aSJohannes Berg return; 9938318d78aSJohannes Berg } 9948318d78aSJohannes Berg 995b2e1b302SLuis R. Rodriguez power_rule = ®_rule->power_rule; 996038659e7SLuis R. Rodriguez freq_range = ®_rule->freq_range; 997038659e7SLuis R. Rodriguez 998038659e7SLuis R. Rodriguez if (freq_range->max_bandwidth_khz < MHZ_TO_KHZ(40)) 999038659e7SLuis R. Rodriguez bw_flags = IEEE80211_CHAN_NO_HT40; 1000b2e1b302SLuis R. Rodriguez 10017db90f4aSLuis R. Rodriguez if (last_request->initiator == NL80211_REGDOM_SET_BY_DRIVER && 1002806a9e39SLuis R. Rodriguez request_wiphy && request_wiphy == wiphy && 1003806a9e39SLuis R. Rodriguez request_wiphy->strict_regulatory) { 1004fb1fc7adSLuis R. Rodriguez /* 1005fb1fc7adSLuis R. Rodriguez * This gaurantees the driver's requested regulatory domain 1006f976376dSLuis R. Rodriguez * will always be used as a base for further regulatory 1007fb1fc7adSLuis R. Rodriguez * settings 1008fb1fc7adSLuis R. Rodriguez */ 1009f976376dSLuis R. Rodriguez chan->flags = chan->orig_flags = 1010038659e7SLuis R. Rodriguez map_regdom_flags(reg_rule->flags) | bw_flags; 1011f976376dSLuis R. Rodriguez chan->max_antenna_gain = chan->orig_mag = 1012f976376dSLuis R. Rodriguez (int) MBI_TO_DBI(power_rule->max_antenna_gain); 1013038659e7SLuis R. Rodriguez chan->max_bandwidth = KHZ_TO_MHZ(desired_bw_khz); 1014f976376dSLuis R. Rodriguez chan->max_power = chan->orig_mpwr = 1015f976376dSLuis R. Rodriguez (int) MBM_TO_DBM(power_rule->max_eirp); 1016f976376dSLuis R. Rodriguez return; 1017f976376dSLuis R. Rodriguez } 1018f976376dSLuis R. Rodriguez 1019038659e7SLuis R. Rodriguez chan->flags = flags | bw_flags | map_regdom_flags(reg_rule->flags); 10208318d78aSJohannes Berg chan->max_antenna_gain = min(chan->orig_mag, 1021b2e1b302SLuis R. Rodriguez (int) MBI_TO_DBI(power_rule->max_antenna_gain)); 1022038659e7SLuis R. Rodriguez chan->max_bandwidth = KHZ_TO_MHZ(desired_bw_khz); 1023253898c4SJohn W. Linville if (chan->orig_mpwr) 1024b2e1b302SLuis R. Rodriguez chan->max_power = min(chan->orig_mpwr, 1025b2e1b302SLuis R. Rodriguez (int) MBM_TO_DBM(power_rule->max_eirp)); 1026253898c4SJohn W. Linville else 1027b2e1b302SLuis R. Rodriguez chan->max_power = (int) MBM_TO_DBM(power_rule->max_eirp); 10288318d78aSJohannes Berg } 10298318d78aSJohannes Berg 1030a92a3ce7SLuis R. Rodriguez static void handle_band(struct wiphy *wiphy, enum ieee80211_band band) 10318318d78aSJohannes Berg { 1032a92a3ce7SLuis R. Rodriguez unsigned int i; 1033a92a3ce7SLuis R. Rodriguez struct ieee80211_supported_band *sband; 1034a92a3ce7SLuis R. Rodriguez 1035a92a3ce7SLuis R. Rodriguez BUG_ON(!wiphy->bands[band]); 1036a92a3ce7SLuis R. Rodriguez sband = wiphy->bands[band]; 10378318d78aSJohannes Berg 10388318d78aSJohannes Berg for (i = 0; i < sband->n_channels; i++) 1039a92a3ce7SLuis R. Rodriguez handle_channel(wiphy, band, i); 10408318d78aSJohannes Berg } 10418318d78aSJohannes Berg 10427db90f4aSLuis R. Rodriguez static bool ignore_reg_update(struct wiphy *wiphy, 10437db90f4aSLuis R. Rodriguez enum nl80211_reg_initiator initiator) 104414b9815aSLuis R. Rodriguez { 104514b9815aSLuis R. Rodriguez if (!last_request) 104614b9815aSLuis R. Rodriguez return true; 10477db90f4aSLuis R. Rodriguez if (initiator == NL80211_REGDOM_SET_BY_CORE && 10482a44f911SLuis R. Rodriguez wiphy->custom_regulatory) 104914b9815aSLuis R. Rodriguez return true; 1050fb1fc7adSLuis R. Rodriguez /* 1051fb1fc7adSLuis R. Rodriguez * wiphy->regd will be set once the device has its own 1052fb1fc7adSLuis R. Rodriguez * desired regulatory domain set 1053fb1fc7adSLuis R. Rodriguez */ 1054f976376dSLuis R. Rodriguez if (wiphy->strict_regulatory && !wiphy->regd && 1055f976376dSLuis R. Rodriguez !is_world_regdom(last_request->alpha2)) 105614b9815aSLuis R. Rodriguez return true; 105714b9815aSLuis R. Rodriguez return false; 105814b9815aSLuis R. Rodriguez } 105914b9815aSLuis R. Rodriguez 10607db90f4aSLuis R. Rodriguez static void update_all_wiphy_regulatory(enum nl80211_reg_initiator initiator) 1061b2e1b302SLuis R. Rodriguez { 1062b2e1b302SLuis R. Rodriguez struct cfg80211_registered_device *drv; 1063b2e1b302SLuis R. Rodriguez 1064b2e1b302SLuis R. Rodriguez list_for_each_entry(drv, &cfg80211_drv_list, list) 10657db90f4aSLuis R. Rodriguez wiphy_update_regulatory(&drv->wiphy, initiator); 1066b2e1b302SLuis R. Rodriguez } 1067b2e1b302SLuis R. Rodriguez 1068e38f8a7aSLuis R. Rodriguez static void handle_reg_beacon(struct wiphy *wiphy, 1069e38f8a7aSLuis R. Rodriguez unsigned int chan_idx, 1070e38f8a7aSLuis R. Rodriguez struct reg_beacon *reg_beacon) 1071e38f8a7aSLuis R. Rodriguez { 1072e38f8a7aSLuis R. Rodriguez struct ieee80211_supported_band *sband; 1073e38f8a7aSLuis R. Rodriguez struct ieee80211_channel *chan; 10746bad8766SLuis R. Rodriguez bool channel_changed = false; 10756bad8766SLuis R. Rodriguez struct ieee80211_channel chan_before; 1076e38f8a7aSLuis R. Rodriguez 1077e38f8a7aSLuis R. Rodriguez assert_cfg80211_lock(); 1078e38f8a7aSLuis R. Rodriguez 1079e38f8a7aSLuis R. Rodriguez sband = wiphy->bands[reg_beacon->chan.band]; 1080e38f8a7aSLuis R. Rodriguez chan = &sband->channels[chan_idx]; 1081e38f8a7aSLuis R. Rodriguez 1082e38f8a7aSLuis R. Rodriguez if (likely(chan->center_freq != reg_beacon->chan.center_freq)) 1083e38f8a7aSLuis R. Rodriguez return; 1084e38f8a7aSLuis R. Rodriguez 10856bad8766SLuis R. Rodriguez if (chan->beacon_found) 10866bad8766SLuis R. Rodriguez return; 10876bad8766SLuis R. Rodriguez 10886bad8766SLuis R. Rodriguez chan->beacon_found = true; 10896bad8766SLuis R. Rodriguez 10906bad8766SLuis R. Rodriguez chan_before.center_freq = chan->center_freq; 10916bad8766SLuis R. Rodriguez chan_before.flags = chan->flags; 10926bad8766SLuis R. Rodriguez 1093a4ed90d6SLuis R. Rodriguez if ((chan->flags & IEEE80211_CHAN_PASSIVE_SCAN) && 1094a4ed90d6SLuis R. Rodriguez !(chan->orig_flags & IEEE80211_CHAN_PASSIVE_SCAN)) { 1095e38f8a7aSLuis R. Rodriguez chan->flags &= ~IEEE80211_CHAN_PASSIVE_SCAN; 10966bad8766SLuis R. Rodriguez channel_changed = true; 1097e38f8a7aSLuis R. Rodriguez } 1098e38f8a7aSLuis R. Rodriguez 1099a4ed90d6SLuis R. Rodriguez if ((chan->flags & IEEE80211_CHAN_NO_IBSS) && 1100a4ed90d6SLuis R. Rodriguez !(chan->orig_flags & IEEE80211_CHAN_NO_IBSS)) { 1101e38f8a7aSLuis R. Rodriguez chan->flags &= ~IEEE80211_CHAN_NO_IBSS; 11026bad8766SLuis R. Rodriguez channel_changed = true; 1103e38f8a7aSLuis R. Rodriguez } 1104e38f8a7aSLuis R. Rodriguez 11056bad8766SLuis R. Rodriguez if (channel_changed) 11066bad8766SLuis R. Rodriguez nl80211_send_beacon_hint_event(wiphy, &chan_before, chan); 1107e38f8a7aSLuis R. Rodriguez } 1108e38f8a7aSLuis R. Rodriguez 1109e38f8a7aSLuis R. Rodriguez /* 1110e38f8a7aSLuis R. Rodriguez * Called when a scan on a wiphy finds a beacon on 1111e38f8a7aSLuis R. Rodriguez * new channel 1112e38f8a7aSLuis R. Rodriguez */ 1113e38f8a7aSLuis R. Rodriguez static void wiphy_update_new_beacon(struct wiphy *wiphy, 1114e38f8a7aSLuis R. Rodriguez struct reg_beacon *reg_beacon) 1115e38f8a7aSLuis R. Rodriguez { 1116e38f8a7aSLuis R. Rodriguez unsigned int i; 1117e38f8a7aSLuis R. Rodriguez struct ieee80211_supported_band *sband; 1118e38f8a7aSLuis R. Rodriguez 1119e38f8a7aSLuis R. Rodriguez assert_cfg80211_lock(); 1120e38f8a7aSLuis R. Rodriguez 1121e38f8a7aSLuis R. Rodriguez if (!wiphy->bands[reg_beacon->chan.band]) 1122e38f8a7aSLuis R. Rodriguez return; 1123e38f8a7aSLuis R. Rodriguez 1124e38f8a7aSLuis R. Rodriguez sband = wiphy->bands[reg_beacon->chan.band]; 1125e38f8a7aSLuis R. Rodriguez 1126e38f8a7aSLuis R. Rodriguez for (i = 0; i < sband->n_channels; i++) 1127e38f8a7aSLuis R. Rodriguez handle_reg_beacon(wiphy, i, reg_beacon); 1128e38f8a7aSLuis R. Rodriguez } 1129e38f8a7aSLuis R. Rodriguez 1130e38f8a7aSLuis R. Rodriguez /* 1131e38f8a7aSLuis R. Rodriguez * Called upon reg changes or a new wiphy is added 1132e38f8a7aSLuis R. Rodriguez */ 1133e38f8a7aSLuis R. Rodriguez static void wiphy_update_beacon_reg(struct wiphy *wiphy) 1134e38f8a7aSLuis R. Rodriguez { 1135e38f8a7aSLuis R. Rodriguez unsigned int i; 1136e38f8a7aSLuis R. Rodriguez struct ieee80211_supported_band *sband; 1137e38f8a7aSLuis R. Rodriguez struct reg_beacon *reg_beacon; 1138e38f8a7aSLuis R. Rodriguez 1139e38f8a7aSLuis R. Rodriguez assert_cfg80211_lock(); 1140e38f8a7aSLuis R. Rodriguez 1141e38f8a7aSLuis R. Rodriguez if (list_empty(®_beacon_list)) 1142e38f8a7aSLuis R. Rodriguez return; 1143e38f8a7aSLuis R. Rodriguez 1144e38f8a7aSLuis R. Rodriguez list_for_each_entry(reg_beacon, ®_beacon_list, list) { 1145e38f8a7aSLuis R. Rodriguez if (!wiphy->bands[reg_beacon->chan.band]) 1146e38f8a7aSLuis R. Rodriguez continue; 1147e38f8a7aSLuis R. Rodriguez sband = wiphy->bands[reg_beacon->chan.band]; 1148e38f8a7aSLuis R. Rodriguez for (i = 0; i < sband->n_channels; i++) 1149e38f8a7aSLuis R. Rodriguez handle_reg_beacon(wiphy, i, reg_beacon); 1150e38f8a7aSLuis R. Rodriguez } 1151e38f8a7aSLuis R. Rodriguez } 1152e38f8a7aSLuis R. Rodriguez 1153e38f8a7aSLuis R. Rodriguez static bool reg_is_world_roaming(struct wiphy *wiphy) 1154e38f8a7aSLuis R. Rodriguez { 1155e38f8a7aSLuis R. Rodriguez if (is_world_regdom(cfg80211_regdomain->alpha2) || 1156e38f8a7aSLuis R. Rodriguez (wiphy->regd && is_world_regdom(wiphy->regd->alpha2))) 1157e38f8a7aSLuis R. Rodriguez return true; 1158b1ed8dddSLuis R. Rodriguez if (last_request && 1159b1ed8dddSLuis R. Rodriguez last_request->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && 1160e38f8a7aSLuis R. Rodriguez wiphy->custom_regulatory) 1161e38f8a7aSLuis R. Rodriguez return true; 1162e38f8a7aSLuis R. Rodriguez return false; 1163e38f8a7aSLuis R. Rodriguez } 1164e38f8a7aSLuis R. Rodriguez 1165e38f8a7aSLuis R. Rodriguez /* Reap the advantages of previously found beacons */ 1166e38f8a7aSLuis R. Rodriguez static void reg_process_beacons(struct wiphy *wiphy) 1167e38f8a7aSLuis R. Rodriguez { 1168b1ed8dddSLuis R. Rodriguez /* 1169b1ed8dddSLuis R. Rodriguez * Means we are just firing up cfg80211, so no beacons would 1170b1ed8dddSLuis R. Rodriguez * have been processed yet. 1171b1ed8dddSLuis R. Rodriguez */ 1172b1ed8dddSLuis R. Rodriguez if (!last_request) 1173b1ed8dddSLuis R. Rodriguez return; 1174e38f8a7aSLuis R. Rodriguez if (!reg_is_world_roaming(wiphy)) 1175e38f8a7aSLuis R. Rodriguez return; 1176e38f8a7aSLuis R. Rodriguez wiphy_update_beacon_reg(wiphy); 1177e38f8a7aSLuis R. Rodriguez } 1178e38f8a7aSLuis R. Rodriguez 1179038659e7SLuis R. Rodriguez static bool is_ht40_not_allowed(struct ieee80211_channel *chan) 1180038659e7SLuis R. Rodriguez { 1181038659e7SLuis R. Rodriguez if (!chan) 1182038659e7SLuis R. Rodriguez return true; 1183038659e7SLuis R. Rodriguez if (chan->flags & IEEE80211_CHAN_DISABLED) 1184038659e7SLuis R. Rodriguez return true; 1185038659e7SLuis R. Rodriguez /* This would happen when regulatory rules disallow HT40 completely */ 1186038659e7SLuis R. Rodriguez if (IEEE80211_CHAN_NO_HT40 == (chan->flags & (IEEE80211_CHAN_NO_HT40))) 1187038659e7SLuis R. Rodriguez return true; 1188038659e7SLuis R. Rodriguez return false; 1189038659e7SLuis R. Rodriguez } 1190038659e7SLuis R. Rodriguez 1191038659e7SLuis R. Rodriguez static void reg_process_ht_flags_channel(struct wiphy *wiphy, 1192038659e7SLuis R. Rodriguez enum ieee80211_band band, 1193038659e7SLuis R. Rodriguez unsigned int chan_idx) 1194038659e7SLuis R. Rodriguez { 1195038659e7SLuis R. Rodriguez struct ieee80211_supported_band *sband; 1196038659e7SLuis R. Rodriguez struct ieee80211_channel *channel; 1197038659e7SLuis R. Rodriguez struct ieee80211_channel *channel_before = NULL, *channel_after = NULL; 1198038659e7SLuis R. Rodriguez unsigned int i; 1199038659e7SLuis R. Rodriguez 1200038659e7SLuis R. Rodriguez assert_cfg80211_lock(); 1201038659e7SLuis R. Rodriguez 1202038659e7SLuis R. Rodriguez sband = wiphy->bands[band]; 1203038659e7SLuis R. Rodriguez BUG_ON(chan_idx >= sband->n_channels); 1204038659e7SLuis R. Rodriguez channel = &sband->channels[chan_idx]; 1205038659e7SLuis R. Rodriguez 1206038659e7SLuis R. Rodriguez if (is_ht40_not_allowed(channel)) { 1207038659e7SLuis R. Rodriguez channel->flags |= IEEE80211_CHAN_NO_HT40; 1208038659e7SLuis R. Rodriguez return; 1209038659e7SLuis R. Rodriguez } 1210038659e7SLuis R. Rodriguez 1211038659e7SLuis R. Rodriguez /* 1212038659e7SLuis R. Rodriguez * We need to ensure the extension channels exist to 1213038659e7SLuis R. Rodriguez * be able to use HT40- or HT40+, this finds them (or not) 1214038659e7SLuis R. Rodriguez */ 1215038659e7SLuis R. Rodriguez for (i = 0; i < sband->n_channels; i++) { 1216038659e7SLuis R. Rodriguez struct ieee80211_channel *c = &sband->channels[i]; 1217038659e7SLuis R. Rodriguez if (c->center_freq == (channel->center_freq - 20)) 1218038659e7SLuis R. Rodriguez channel_before = c; 1219038659e7SLuis R. Rodriguez if (c->center_freq == (channel->center_freq + 20)) 1220038659e7SLuis R. Rodriguez channel_after = c; 1221038659e7SLuis R. Rodriguez } 1222038659e7SLuis R. Rodriguez 1223038659e7SLuis R. Rodriguez /* 1224038659e7SLuis R. Rodriguez * Please note that this assumes target bandwidth is 20 MHz, 1225038659e7SLuis R. Rodriguez * if that ever changes we also need to change the below logic 1226038659e7SLuis R. Rodriguez * to include that as well. 1227038659e7SLuis R. Rodriguez */ 1228038659e7SLuis R. Rodriguez if (is_ht40_not_allowed(channel_before)) 1229038659e7SLuis R. Rodriguez channel->flags |= IEEE80211_CHAN_NO_FAT_BELOW; 1230038659e7SLuis R. Rodriguez else 1231038659e7SLuis R. Rodriguez channel->flags &= ~IEEE80211_CHAN_NO_FAT_BELOW; 1232038659e7SLuis R. Rodriguez 1233038659e7SLuis R. Rodriguez if (is_ht40_not_allowed(channel_after)) 1234038659e7SLuis R. Rodriguez channel->flags |= IEEE80211_CHAN_NO_FAT_ABOVE; 1235038659e7SLuis R. Rodriguez else 1236038659e7SLuis R. Rodriguez channel->flags &= ~IEEE80211_CHAN_NO_FAT_ABOVE; 1237038659e7SLuis R. Rodriguez } 1238038659e7SLuis R. Rodriguez 1239038659e7SLuis R. Rodriguez static void reg_process_ht_flags_band(struct wiphy *wiphy, 1240038659e7SLuis R. Rodriguez enum ieee80211_band band) 1241038659e7SLuis R. Rodriguez { 1242038659e7SLuis R. Rodriguez unsigned int i; 1243038659e7SLuis R. Rodriguez struct ieee80211_supported_band *sband; 1244038659e7SLuis R. Rodriguez 1245038659e7SLuis R. Rodriguez BUG_ON(!wiphy->bands[band]); 1246038659e7SLuis R. Rodriguez sband = wiphy->bands[band]; 1247038659e7SLuis R. Rodriguez 1248038659e7SLuis R. Rodriguez for (i = 0; i < sband->n_channels; i++) 1249038659e7SLuis R. Rodriguez reg_process_ht_flags_channel(wiphy, band, i); 1250038659e7SLuis R. Rodriguez } 1251038659e7SLuis R. Rodriguez 1252038659e7SLuis R. Rodriguez static void reg_process_ht_flags(struct wiphy *wiphy) 1253038659e7SLuis R. Rodriguez { 1254038659e7SLuis R. Rodriguez enum ieee80211_band band; 1255038659e7SLuis R. Rodriguez 1256038659e7SLuis R. Rodriguez if (!wiphy) 1257038659e7SLuis R. Rodriguez return; 1258038659e7SLuis R. Rodriguez 1259038659e7SLuis R. Rodriguez for (band = 0; band < IEEE80211_NUM_BANDS; band++) { 1260038659e7SLuis R. Rodriguez if (wiphy->bands[band]) 1261038659e7SLuis R. Rodriguez reg_process_ht_flags_band(wiphy, band); 1262038659e7SLuis R. Rodriguez } 1263038659e7SLuis R. Rodriguez 1264038659e7SLuis R. Rodriguez } 1265038659e7SLuis R. Rodriguez 12667db90f4aSLuis R. Rodriguez void wiphy_update_regulatory(struct wiphy *wiphy, 12677db90f4aSLuis R. Rodriguez enum nl80211_reg_initiator initiator) 12688318d78aSJohannes Berg { 12698318d78aSJohannes Berg enum ieee80211_band band; 1270d46e5b1dSLuis R. Rodriguez 12717db90f4aSLuis R. Rodriguez if (ignore_reg_update(wiphy, initiator)) 1272e38f8a7aSLuis R. Rodriguez goto out; 1273b2e1b302SLuis R. Rodriguez for (band = 0; band < IEEE80211_NUM_BANDS; band++) { 12748318d78aSJohannes Berg if (wiphy->bands[band]) 1275a92a3ce7SLuis R. Rodriguez handle_band(wiphy, band); 1276b2e1b302SLuis R. Rodriguez } 1277e38f8a7aSLuis R. Rodriguez out: 1278e38f8a7aSLuis R. Rodriguez reg_process_beacons(wiphy); 1279038659e7SLuis R. Rodriguez reg_process_ht_flags(wiphy); 1280b2e1b302SLuis R. Rodriguez if (wiphy->reg_notifier) 1281716f9392SLuis R. Rodriguez wiphy->reg_notifier(wiphy, last_request); 1282b2e1b302SLuis R. Rodriguez } 1283b2e1b302SLuis R. Rodriguez 12841fa25e41SLuis R. Rodriguez static void handle_channel_custom(struct wiphy *wiphy, 12851fa25e41SLuis R. Rodriguez enum ieee80211_band band, 12861fa25e41SLuis R. Rodriguez unsigned int chan_idx, 12871fa25e41SLuis R. Rodriguez const struct ieee80211_regdomain *regd) 12881fa25e41SLuis R. Rodriguez { 12891fa25e41SLuis R. Rodriguez int r; 1290038659e7SLuis R. Rodriguez u32 desired_bw_khz = MHZ_TO_KHZ(20); 1291038659e7SLuis R. Rodriguez u32 bw_flags = 0; 12921fa25e41SLuis R. Rodriguez const struct ieee80211_reg_rule *reg_rule = NULL; 12931fa25e41SLuis R. Rodriguez const struct ieee80211_power_rule *power_rule = NULL; 1294038659e7SLuis R. Rodriguez const struct ieee80211_freq_range *freq_range = NULL; 12951fa25e41SLuis R. Rodriguez struct ieee80211_supported_band *sband; 12961fa25e41SLuis R. Rodriguez struct ieee80211_channel *chan; 12971fa25e41SLuis R. Rodriguez 1298ac46d48eSLuis R. Rodriguez assert_cfg80211_lock(); 1299ac46d48eSLuis R. Rodriguez 13001fa25e41SLuis R. Rodriguez sband = wiphy->bands[band]; 13011fa25e41SLuis R. Rodriguez BUG_ON(chan_idx >= sband->n_channels); 13021fa25e41SLuis R. Rodriguez chan = &sband->channels[chan_idx]; 13031fa25e41SLuis R. Rodriguez 1304038659e7SLuis R. Rodriguez r = freq_reg_info_regd(wiphy, 1305038659e7SLuis R. Rodriguez MHZ_TO_KHZ(chan->center_freq), 1306038659e7SLuis R. Rodriguez desired_bw_khz, 1307038659e7SLuis R. Rodriguez ®_rule, 1308038659e7SLuis R. Rodriguez regd); 13091fa25e41SLuis R. Rodriguez 13101fa25e41SLuis R. Rodriguez if (r) { 13111fa25e41SLuis R. Rodriguez chan->flags = IEEE80211_CHAN_DISABLED; 13121fa25e41SLuis R. Rodriguez return; 13131fa25e41SLuis R. Rodriguez } 13141fa25e41SLuis R. Rodriguez 13151fa25e41SLuis R. Rodriguez power_rule = ®_rule->power_rule; 1316038659e7SLuis R. Rodriguez freq_range = ®_rule->freq_range; 13171fa25e41SLuis R. Rodriguez 1318038659e7SLuis R. Rodriguez if (freq_range->max_bandwidth_khz < MHZ_TO_KHZ(40)) 1319038659e7SLuis R. Rodriguez bw_flags = IEEE80211_CHAN_NO_HT40; 1320038659e7SLuis R. Rodriguez 1321038659e7SLuis R. Rodriguez chan->flags |= map_regdom_flags(reg_rule->flags) | bw_flags; 13221fa25e41SLuis R. Rodriguez chan->max_antenna_gain = (int) MBI_TO_DBI(power_rule->max_antenna_gain); 1323038659e7SLuis R. Rodriguez chan->max_bandwidth = KHZ_TO_MHZ(desired_bw_khz); 13241fa25e41SLuis R. Rodriguez chan->max_power = (int) MBM_TO_DBM(power_rule->max_eirp); 13251fa25e41SLuis R. Rodriguez } 13261fa25e41SLuis R. Rodriguez 13271fa25e41SLuis R. Rodriguez static void handle_band_custom(struct wiphy *wiphy, enum ieee80211_band band, 13281fa25e41SLuis R. Rodriguez const struct ieee80211_regdomain *regd) 13291fa25e41SLuis R. Rodriguez { 13301fa25e41SLuis R. Rodriguez unsigned int i; 13311fa25e41SLuis R. Rodriguez struct ieee80211_supported_band *sband; 13321fa25e41SLuis R. Rodriguez 13331fa25e41SLuis R. Rodriguez BUG_ON(!wiphy->bands[band]); 13341fa25e41SLuis R. Rodriguez sband = wiphy->bands[band]; 13351fa25e41SLuis R. Rodriguez 13361fa25e41SLuis R. Rodriguez for (i = 0; i < sband->n_channels; i++) 13371fa25e41SLuis R. Rodriguez handle_channel_custom(wiphy, band, i, regd); 13381fa25e41SLuis R. Rodriguez } 13391fa25e41SLuis R. Rodriguez 13401fa25e41SLuis R. Rodriguez /* Used by drivers prior to wiphy registration */ 13411fa25e41SLuis R. Rodriguez void wiphy_apply_custom_regulatory(struct wiphy *wiphy, 13421fa25e41SLuis R. Rodriguez const struct ieee80211_regdomain *regd) 13431fa25e41SLuis R. Rodriguez { 13441fa25e41SLuis R. Rodriguez enum ieee80211_band band; 1345ac46d48eSLuis R. Rodriguez 1346ac46d48eSLuis R. Rodriguez mutex_lock(&cfg80211_mutex); 13471fa25e41SLuis R. Rodriguez for (band = 0; band < IEEE80211_NUM_BANDS; band++) { 13481fa25e41SLuis R. Rodriguez if (wiphy->bands[band]) 13491fa25e41SLuis R. Rodriguez handle_band_custom(wiphy, band, regd); 13501fa25e41SLuis R. Rodriguez } 1351ac46d48eSLuis R. Rodriguez mutex_unlock(&cfg80211_mutex); 13521fa25e41SLuis R. Rodriguez } 13531fa25e41SLuis R. Rodriguez EXPORT_SYMBOL(wiphy_apply_custom_regulatory); 13541fa25e41SLuis R. Rodriguez 13553e0c3ff3SLuis R. Rodriguez static int reg_copy_regd(const struct ieee80211_regdomain **dst_regd, 13563e0c3ff3SLuis R. Rodriguez const struct ieee80211_regdomain *src_regd) 13573e0c3ff3SLuis R. Rodriguez { 13583e0c3ff3SLuis R. Rodriguez struct ieee80211_regdomain *regd; 13593e0c3ff3SLuis R. Rodriguez int size_of_regd = 0; 13603e0c3ff3SLuis R. Rodriguez unsigned int i; 13613e0c3ff3SLuis R. Rodriguez 13623e0c3ff3SLuis R. Rodriguez size_of_regd = sizeof(struct ieee80211_regdomain) + 13633e0c3ff3SLuis R. Rodriguez ((src_regd->n_reg_rules + 1) * sizeof(struct ieee80211_reg_rule)); 13643e0c3ff3SLuis R. Rodriguez 13653e0c3ff3SLuis R. Rodriguez regd = kzalloc(size_of_regd, GFP_KERNEL); 13663e0c3ff3SLuis R. Rodriguez if (!regd) 13673e0c3ff3SLuis R. Rodriguez return -ENOMEM; 13683e0c3ff3SLuis R. Rodriguez 13693e0c3ff3SLuis R. Rodriguez memcpy(regd, src_regd, sizeof(struct ieee80211_regdomain)); 13703e0c3ff3SLuis R. Rodriguez 13713e0c3ff3SLuis R. Rodriguez for (i = 0; i < src_regd->n_reg_rules; i++) 13723e0c3ff3SLuis R. Rodriguez memcpy(®d->reg_rules[i], &src_regd->reg_rules[i], 13733e0c3ff3SLuis R. Rodriguez sizeof(struct ieee80211_reg_rule)); 13743e0c3ff3SLuis R. Rodriguez 13753e0c3ff3SLuis R. Rodriguez *dst_regd = regd; 13763e0c3ff3SLuis R. Rodriguez return 0; 1377b2e1b302SLuis R. Rodriguez } 1378b2e1b302SLuis R. Rodriguez 1379fb1fc7adSLuis R. Rodriguez /* 1380fb1fc7adSLuis R. Rodriguez * Return value which can be used by ignore_request() to indicate 1381fb1fc7adSLuis R. Rodriguez * it has been determined we should intersect two regulatory domains 1382fb1fc7adSLuis R. Rodriguez */ 13839c96477dSLuis R. Rodriguez #define REG_INTERSECT 1 13849c96477dSLuis R. Rodriguez 138584fa4f43SJohannes Berg /* This has the logic which determines when a new request 138684fa4f43SJohannes Berg * should be ignored. */ 13872f92cd2eSLuis R. Rodriguez static int ignore_request(struct wiphy *wiphy, 13882f92cd2eSLuis R. Rodriguez struct regulatory_request *pending_request) 138984fa4f43SJohannes Berg { 1390806a9e39SLuis R. Rodriguez struct wiphy *last_wiphy = NULL; 1391761cf7ecSLuis R. Rodriguez 1392761cf7ecSLuis R. Rodriguez assert_cfg80211_lock(); 1393761cf7ecSLuis R. Rodriguez 139484fa4f43SJohannes Berg /* All initial requests are respected */ 139584fa4f43SJohannes Berg if (!last_request) 139684fa4f43SJohannes Berg return 0; 139784fa4f43SJohannes Berg 13982f92cd2eSLuis R. Rodriguez switch (pending_request->initiator) { 13997db90f4aSLuis R. Rodriguez case NL80211_REGDOM_SET_BY_CORE: 1400ba25c141SLuis R. Rodriguez return -EINVAL; 14017db90f4aSLuis R. Rodriguez case NL80211_REGDOM_SET_BY_COUNTRY_IE: 1402806a9e39SLuis R. Rodriguez 1403806a9e39SLuis R. Rodriguez last_wiphy = wiphy_idx_to_wiphy(last_request->wiphy_idx); 1404806a9e39SLuis R. Rodriguez 14052f92cd2eSLuis R. Rodriguez if (unlikely(!is_an_alpha2(pending_request->alpha2))) 140684fa4f43SJohannes Berg return -EINVAL; 14077db90f4aSLuis R. Rodriguez if (last_request->initiator == 14087db90f4aSLuis R. Rodriguez NL80211_REGDOM_SET_BY_COUNTRY_IE) { 1409806a9e39SLuis R. Rodriguez if (last_wiphy != wiphy) { 141084fa4f43SJohannes Berg /* 141184fa4f43SJohannes Berg * Two cards with two APs claiming different 141284fa4f43SJohannes Berg * different Country IE alpha2s. We could 141384fa4f43SJohannes Berg * intersect them, but that seems unlikely 141484fa4f43SJohannes Berg * to be correct. Reject second one for now. 141584fa4f43SJohannes Berg */ 14162f92cd2eSLuis R. Rodriguez if (regdom_changes(pending_request->alpha2)) 141784fa4f43SJohannes Berg return -EOPNOTSUPP; 141884fa4f43SJohannes Berg return -EALREADY; 141984fa4f43SJohannes Berg } 1420fb1fc7adSLuis R. Rodriguez /* 1421fb1fc7adSLuis R. Rodriguez * Two consecutive Country IE hints on the same wiphy. 1422fb1fc7adSLuis R. Rodriguez * This should be picked up early by the driver/stack 1423fb1fc7adSLuis R. Rodriguez */ 14242f92cd2eSLuis R. Rodriguez if (WARN_ON(regdom_changes(pending_request->alpha2))) 142584fa4f43SJohannes Berg return 0; 142684fa4f43SJohannes Berg return -EALREADY; 142784fa4f43SJohannes Berg } 14283f2355cbSLuis R. Rodriguez return REG_INTERSECT; 14297db90f4aSLuis R. Rodriguez case NL80211_REGDOM_SET_BY_DRIVER: 14307db90f4aSLuis R. Rodriguez if (last_request->initiator == NL80211_REGDOM_SET_BY_CORE) { 1431e74b1e7fSLuis R. Rodriguez if (is_old_static_regdom(cfg80211_regdomain)) 143284fa4f43SJohannes Berg return 0; 14332f92cd2eSLuis R. Rodriguez if (regdom_changes(pending_request->alpha2)) 1434e74b1e7fSLuis R. Rodriguez return 0; 1435e74b1e7fSLuis R. Rodriguez return -EALREADY; 1436e74b1e7fSLuis R. Rodriguez } 1437fff32c04SLuis R. Rodriguez 1438fff32c04SLuis R. Rodriguez /* 1439fff32c04SLuis R. Rodriguez * This would happen if you unplug and plug your card 1440fff32c04SLuis R. Rodriguez * back in or if you add a new device for which the previously 1441fff32c04SLuis R. Rodriguez * loaded card also agrees on the regulatory domain. 1442fff32c04SLuis R. Rodriguez */ 14437db90f4aSLuis R. Rodriguez if (last_request->initiator == NL80211_REGDOM_SET_BY_DRIVER && 14442f92cd2eSLuis R. Rodriguez !regdom_changes(pending_request->alpha2)) 1445fff32c04SLuis R. Rodriguez return -EALREADY; 1446fff32c04SLuis R. Rodriguez 14473e0c3ff3SLuis R. Rodriguez return REG_INTERSECT; 14487db90f4aSLuis R. Rodriguez case NL80211_REGDOM_SET_BY_USER: 14497db90f4aSLuis R. Rodriguez if (last_request->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) 14509c96477dSLuis R. Rodriguez return REG_INTERSECT; 1451fb1fc7adSLuis R. Rodriguez /* 1452fb1fc7adSLuis R. Rodriguez * If the user knows better the user should set the regdom 1453fb1fc7adSLuis R. Rodriguez * to their country before the IE is picked up 1454fb1fc7adSLuis R. Rodriguez */ 14557db90f4aSLuis R. Rodriguez if (last_request->initiator == NL80211_REGDOM_SET_BY_USER && 14563f2355cbSLuis R. Rodriguez last_request->intersect) 14573f2355cbSLuis R. Rodriguez return -EOPNOTSUPP; 1458fb1fc7adSLuis R. Rodriguez /* 1459fb1fc7adSLuis R. Rodriguez * Process user requests only after previous user/driver/core 1460fb1fc7adSLuis R. Rodriguez * requests have been processed 1461fb1fc7adSLuis R. Rodriguez */ 14627db90f4aSLuis R. Rodriguez if (last_request->initiator == NL80211_REGDOM_SET_BY_CORE || 14637db90f4aSLuis R. Rodriguez last_request->initiator == NL80211_REGDOM_SET_BY_DRIVER || 14647db90f4aSLuis R. Rodriguez last_request->initiator == NL80211_REGDOM_SET_BY_USER) { 146569b1572bSLuis R. Rodriguez if (regdom_changes(last_request->alpha2)) 14665eebade6SLuis R. Rodriguez return -EAGAIN; 14675eebade6SLuis R. Rodriguez } 14685eebade6SLuis R. Rodriguez 1469e74b1e7fSLuis R. Rodriguez if (!is_old_static_regdom(cfg80211_regdomain) && 14702f92cd2eSLuis R. Rodriguez !regdom_changes(pending_request->alpha2)) 1471e74b1e7fSLuis R. Rodriguez return -EALREADY; 1472e74b1e7fSLuis R. Rodriguez 147384fa4f43SJohannes Berg return 0; 147484fa4f43SJohannes Berg } 147584fa4f43SJohannes Berg 147684fa4f43SJohannes Berg return -EINVAL; 147784fa4f43SJohannes Berg } 147884fa4f43SJohannes Berg 1479d1c96a9aSLuis R. Rodriguez /** 1480d1c96a9aSLuis R. Rodriguez * __regulatory_hint - hint to the wireless core a regulatory domain 1481d1c96a9aSLuis R. Rodriguez * @wiphy: if the hint comes from country information from an AP, this 1482d1c96a9aSLuis R. Rodriguez * is required to be set to the wiphy that received the information 148328da32d7SLuis R. Rodriguez * @pending_request: the regulatory request currently being processed 1484d1c96a9aSLuis R. Rodriguez * 1485d1c96a9aSLuis R. Rodriguez * The Wireless subsystem can use this function to hint to the wireless core 148628da32d7SLuis R. Rodriguez * what it believes should be the current regulatory domain. 1487d1c96a9aSLuis R. Rodriguez * 1488d1c96a9aSLuis R. Rodriguez * Returns zero if all went fine, %-EALREADY if a regulatory domain had 1489d1c96a9aSLuis R. Rodriguez * already been set or other standard error codes. 1490d1c96a9aSLuis R. Rodriguez * 1491d1c96a9aSLuis R. Rodriguez * Caller must hold &cfg80211_mutex 1492d1c96a9aSLuis R. Rodriguez */ 149328da32d7SLuis R. Rodriguez static int __regulatory_hint(struct wiphy *wiphy, 149428da32d7SLuis R. Rodriguez struct regulatory_request *pending_request) 1495b2e1b302SLuis R. Rodriguez { 14969c96477dSLuis R. Rodriguez bool intersect = false; 1497b2e1b302SLuis R. Rodriguez int r = 0; 1498b2e1b302SLuis R. Rodriguez 1499761cf7ecSLuis R. Rodriguez assert_cfg80211_lock(); 1500761cf7ecSLuis R. Rodriguez 15012f92cd2eSLuis R. Rodriguez r = ignore_request(wiphy, pending_request); 15029c96477dSLuis R. Rodriguez 15033e0c3ff3SLuis R. Rodriguez if (r == REG_INTERSECT) { 15047db90f4aSLuis R. Rodriguez if (pending_request->initiator == 15057db90f4aSLuis R. Rodriguez NL80211_REGDOM_SET_BY_DRIVER) { 15063e0c3ff3SLuis R. Rodriguez r = reg_copy_regd(&wiphy->regd, cfg80211_regdomain); 1507d951c1ddSLuis R. Rodriguez if (r) { 1508d951c1ddSLuis R. Rodriguez kfree(pending_request); 1509b2e1b302SLuis R. Rodriguez return r; 15103e0c3ff3SLuis R. Rodriguez } 1511d951c1ddSLuis R. Rodriguez } 15123e0c3ff3SLuis R. Rodriguez intersect = true; 15133e0c3ff3SLuis R. Rodriguez } else if (r) { 1514fb1fc7adSLuis R. Rodriguez /* 1515fb1fc7adSLuis R. Rodriguez * If the regulatory domain being requested by the 15163e0c3ff3SLuis R. Rodriguez * driver has already been set just copy it to the 1517fb1fc7adSLuis R. Rodriguez * wiphy 1518fb1fc7adSLuis R. Rodriguez */ 151928da32d7SLuis R. Rodriguez if (r == -EALREADY && 15207db90f4aSLuis R. Rodriguez pending_request->initiator == 15217db90f4aSLuis R. Rodriguez NL80211_REGDOM_SET_BY_DRIVER) { 15223e0c3ff3SLuis R. Rodriguez r = reg_copy_regd(&wiphy->regd, cfg80211_regdomain); 1523d951c1ddSLuis R. Rodriguez if (r) { 1524d951c1ddSLuis R. Rodriguez kfree(pending_request); 15253e0c3ff3SLuis R. Rodriguez return r; 1526d951c1ddSLuis R. Rodriguez } 15273e0c3ff3SLuis R. Rodriguez r = -EALREADY; 15283e0c3ff3SLuis R. Rodriguez goto new_request; 15293e0c3ff3SLuis R. Rodriguez } 1530d951c1ddSLuis R. Rodriguez kfree(pending_request); 15313e0c3ff3SLuis R. Rodriguez return r; 15323e0c3ff3SLuis R. Rodriguez } 1533b2e1b302SLuis R. Rodriguez 15343e0c3ff3SLuis R. Rodriguez new_request: 1535f6037d09SJohannes Berg kfree(last_request); 1536d951c1ddSLuis R. Rodriguez 1537d951c1ddSLuis R. Rodriguez last_request = pending_request; 1538d951c1ddSLuis R. Rodriguez last_request->intersect = intersect; 1539d951c1ddSLuis R. Rodriguez 1540d951c1ddSLuis R. Rodriguez pending_request = NULL; 15413e0c3ff3SLuis R. Rodriguez 15423e0c3ff3SLuis R. Rodriguez /* When r == REG_INTERSECT we do need to call CRDA */ 154373d54c9eSLuis R. Rodriguez if (r < 0) { 154473d54c9eSLuis R. Rodriguez /* 154573d54c9eSLuis R. Rodriguez * Since CRDA will not be called in this case as we already 154673d54c9eSLuis R. Rodriguez * have applied the requested regulatory domain before we just 154773d54c9eSLuis R. Rodriguez * inform userspace we have processed the request 154873d54c9eSLuis R. Rodriguez */ 154973d54c9eSLuis R. Rodriguez if (r == -EALREADY) 155073d54c9eSLuis R. Rodriguez nl80211_send_reg_change_event(last_request); 15513e0c3ff3SLuis R. Rodriguez return r; 155273d54c9eSLuis R. Rodriguez } 15533e0c3ff3SLuis R. Rodriguez 1554d951c1ddSLuis R. Rodriguez return call_crda(last_request->alpha2); 1555b2e1b302SLuis R. Rodriguez } 1556b2e1b302SLuis R. Rodriguez 155730a548c7SLuis R. Rodriguez /* This processes *all* regulatory hints */ 1558d951c1ddSLuis R. Rodriguez static void reg_process_hint(struct regulatory_request *reg_request) 1559fe33eb39SLuis R. Rodriguez { 1560fe33eb39SLuis R. Rodriguez int r = 0; 1561fe33eb39SLuis R. Rodriguez struct wiphy *wiphy = NULL; 1562fe33eb39SLuis R. Rodriguez 1563fe33eb39SLuis R. Rodriguez BUG_ON(!reg_request->alpha2); 1564fe33eb39SLuis R. Rodriguez 1565fe33eb39SLuis R. Rodriguez mutex_lock(&cfg80211_mutex); 1566fe33eb39SLuis R. Rodriguez 1567fe33eb39SLuis R. Rodriguez if (wiphy_idx_valid(reg_request->wiphy_idx)) 1568fe33eb39SLuis R. Rodriguez wiphy = wiphy_idx_to_wiphy(reg_request->wiphy_idx); 1569fe33eb39SLuis R. Rodriguez 15707db90f4aSLuis R. Rodriguez if (reg_request->initiator == NL80211_REGDOM_SET_BY_DRIVER && 1571fe33eb39SLuis R. Rodriguez !wiphy) { 1572d951c1ddSLuis R. Rodriguez kfree(reg_request); 1573fe33eb39SLuis R. Rodriguez goto out; 1574fe33eb39SLuis R. Rodriguez } 1575fe33eb39SLuis R. Rodriguez 157628da32d7SLuis R. Rodriguez r = __regulatory_hint(wiphy, reg_request); 1577fe33eb39SLuis R. Rodriguez /* This is required so that the orig_* parameters are saved */ 1578fe33eb39SLuis R. Rodriguez if (r == -EALREADY && wiphy && wiphy->strict_regulatory) 1579fe33eb39SLuis R. Rodriguez wiphy_update_regulatory(wiphy, reg_request->initiator); 1580fe33eb39SLuis R. Rodriguez out: 1581fe33eb39SLuis R. Rodriguez mutex_unlock(&cfg80211_mutex); 1582fe33eb39SLuis R. Rodriguez } 1583fe33eb39SLuis R. Rodriguez 15847db90f4aSLuis R. Rodriguez /* Processes regulatory hints, this is all the NL80211_REGDOM_SET_BY_* */ 1585fe33eb39SLuis R. Rodriguez static void reg_process_pending_hints(void) 1586fe33eb39SLuis R. Rodriguez { 1587fe33eb39SLuis R. Rodriguez struct regulatory_request *reg_request; 1588fe33eb39SLuis R. Rodriguez 1589fe33eb39SLuis R. Rodriguez spin_lock(®_requests_lock); 1590fe33eb39SLuis R. Rodriguez while (!list_empty(®_requests_list)) { 1591fe33eb39SLuis R. Rodriguez reg_request = list_first_entry(®_requests_list, 1592fe33eb39SLuis R. Rodriguez struct regulatory_request, 1593fe33eb39SLuis R. Rodriguez list); 1594fe33eb39SLuis R. Rodriguez list_del_init(®_request->list); 1595fe33eb39SLuis R. Rodriguez 1596d951c1ddSLuis R. Rodriguez spin_unlock(®_requests_lock); 1597d951c1ddSLuis R. Rodriguez reg_process_hint(reg_request); 1598fe33eb39SLuis R. Rodriguez spin_lock(®_requests_lock); 1599fe33eb39SLuis R. Rodriguez } 1600fe33eb39SLuis R. Rodriguez spin_unlock(®_requests_lock); 1601fe33eb39SLuis R. Rodriguez } 1602fe33eb39SLuis R. Rodriguez 1603e38f8a7aSLuis R. Rodriguez /* Processes beacon hints -- this has nothing to do with country IEs */ 1604e38f8a7aSLuis R. Rodriguez static void reg_process_pending_beacon_hints(void) 1605e38f8a7aSLuis R. Rodriguez { 1606e38f8a7aSLuis R. Rodriguez struct cfg80211_registered_device *drv; 1607e38f8a7aSLuis R. Rodriguez struct reg_beacon *pending_beacon, *tmp; 1608e38f8a7aSLuis R. Rodriguez 1609e38f8a7aSLuis R. Rodriguez mutex_lock(&cfg80211_mutex); 1610e38f8a7aSLuis R. Rodriguez 1611e38f8a7aSLuis R. Rodriguez /* This goes through the _pending_ beacon list */ 1612e38f8a7aSLuis R. Rodriguez spin_lock_bh(®_pending_beacons_lock); 1613e38f8a7aSLuis R. Rodriguez 1614e38f8a7aSLuis R. Rodriguez if (list_empty(®_pending_beacons)) { 1615e38f8a7aSLuis R. Rodriguez spin_unlock_bh(®_pending_beacons_lock); 1616e38f8a7aSLuis R. Rodriguez goto out; 1617e38f8a7aSLuis R. Rodriguez } 1618e38f8a7aSLuis R. Rodriguez 1619e38f8a7aSLuis R. Rodriguez list_for_each_entry_safe(pending_beacon, tmp, 1620e38f8a7aSLuis R. Rodriguez ®_pending_beacons, list) { 1621e38f8a7aSLuis R. Rodriguez 1622e38f8a7aSLuis R. Rodriguez list_del_init(&pending_beacon->list); 1623e38f8a7aSLuis R. Rodriguez 1624e38f8a7aSLuis R. Rodriguez /* Applies the beacon hint to current wiphys */ 1625e38f8a7aSLuis R. Rodriguez list_for_each_entry(drv, &cfg80211_drv_list, list) 1626e38f8a7aSLuis R. Rodriguez wiphy_update_new_beacon(&drv->wiphy, pending_beacon); 1627e38f8a7aSLuis R. Rodriguez 1628e38f8a7aSLuis R. Rodriguez /* Remembers the beacon hint for new wiphys or reg changes */ 1629e38f8a7aSLuis R. Rodriguez list_add_tail(&pending_beacon->list, ®_beacon_list); 1630e38f8a7aSLuis R. Rodriguez } 1631e38f8a7aSLuis R. Rodriguez 1632e38f8a7aSLuis R. Rodriguez spin_unlock_bh(®_pending_beacons_lock); 1633e38f8a7aSLuis R. Rodriguez out: 1634e38f8a7aSLuis R. Rodriguez mutex_unlock(&cfg80211_mutex); 1635e38f8a7aSLuis R. Rodriguez } 1636e38f8a7aSLuis R. Rodriguez 1637fe33eb39SLuis R. Rodriguez static void reg_todo(struct work_struct *work) 1638fe33eb39SLuis R. Rodriguez { 1639fe33eb39SLuis R. Rodriguez reg_process_pending_hints(); 1640e38f8a7aSLuis R. Rodriguez reg_process_pending_beacon_hints(); 1641fe33eb39SLuis R. Rodriguez } 1642fe33eb39SLuis R. Rodriguez 1643fe33eb39SLuis R. Rodriguez static DECLARE_WORK(reg_work, reg_todo); 1644fe33eb39SLuis R. Rodriguez 1645fe33eb39SLuis R. Rodriguez static void queue_regulatory_request(struct regulatory_request *request) 1646fe33eb39SLuis R. Rodriguez { 1647fe33eb39SLuis R. Rodriguez spin_lock(®_requests_lock); 1648fe33eb39SLuis R. Rodriguez list_add_tail(&request->list, ®_requests_list); 1649fe33eb39SLuis R. Rodriguez spin_unlock(®_requests_lock); 1650fe33eb39SLuis R. Rodriguez 1651fe33eb39SLuis R. Rodriguez schedule_work(®_work); 1652fe33eb39SLuis R. Rodriguez } 1653fe33eb39SLuis R. Rodriguez 1654fe33eb39SLuis R. Rodriguez /* Core regulatory hint -- happens once during cfg80211_init() */ 1655ba25c141SLuis R. Rodriguez static int regulatory_hint_core(const char *alpha2) 1656ba25c141SLuis R. Rodriguez { 1657ba25c141SLuis R. Rodriguez struct regulatory_request *request; 1658ba25c141SLuis R. Rodriguez 1659ba25c141SLuis R. Rodriguez BUG_ON(last_request); 1660ba25c141SLuis R. Rodriguez 1661ba25c141SLuis R. Rodriguez request = kzalloc(sizeof(struct regulatory_request), 1662ba25c141SLuis R. Rodriguez GFP_KERNEL); 1663ba25c141SLuis R. Rodriguez if (!request) 1664ba25c141SLuis R. Rodriguez return -ENOMEM; 1665ba25c141SLuis R. Rodriguez 1666ba25c141SLuis R. Rodriguez request->alpha2[0] = alpha2[0]; 1667ba25c141SLuis R. Rodriguez request->alpha2[1] = alpha2[1]; 16687db90f4aSLuis R. Rodriguez request->initiator = NL80211_REGDOM_SET_BY_CORE; 1669ba25c141SLuis R. Rodriguez 1670fe33eb39SLuis R. Rodriguez queue_regulatory_request(request); 1671ba25c141SLuis R. Rodriguez 1672fe33eb39SLuis R. Rodriguez return 0; 1673ba25c141SLuis R. Rodriguez } 1674ba25c141SLuis R. Rodriguez 1675fe33eb39SLuis R. Rodriguez /* User hints */ 1676fe33eb39SLuis R. Rodriguez int regulatory_hint_user(const char *alpha2) 1677b2e1b302SLuis R. Rodriguez { 1678fe33eb39SLuis R. Rodriguez struct regulatory_request *request; 1679fe33eb39SLuis R. Rodriguez 1680be3d4810SJohannes Berg BUG_ON(!alpha2); 1681b2e1b302SLuis R. Rodriguez 1682fe33eb39SLuis R. Rodriguez request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); 1683fe33eb39SLuis R. Rodriguez if (!request) 1684fe33eb39SLuis R. Rodriguez return -ENOMEM; 1685fe33eb39SLuis R. Rodriguez 1686fe33eb39SLuis R. Rodriguez request->wiphy_idx = WIPHY_IDX_STALE; 1687fe33eb39SLuis R. Rodriguez request->alpha2[0] = alpha2[0]; 1688fe33eb39SLuis R. Rodriguez request->alpha2[1] = alpha2[1]; 16897db90f4aSLuis R. Rodriguez request->initiator = NL80211_REGDOM_SET_BY_USER, 1690fe33eb39SLuis R. Rodriguez 1691fe33eb39SLuis R. Rodriguez queue_regulatory_request(request); 1692fe33eb39SLuis R. Rodriguez 1693fe33eb39SLuis R. Rodriguez return 0; 1694fe33eb39SLuis R. Rodriguez } 1695fe33eb39SLuis R. Rodriguez 1696fe33eb39SLuis R. Rodriguez /* Driver hints */ 1697fe33eb39SLuis R. Rodriguez int regulatory_hint(struct wiphy *wiphy, const char *alpha2) 1698fe33eb39SLuis R. Rodriguez { 1699fe33eb39SLuis R. Rodriguez struct regulatory_request *request; 1700fe33eb39SLuis R. Rodriguez 1701fe33eb39SLuis R. Rodriguez BUG_ON(!alpha2); 1702fe33eb39SLuis R. Rodriguez BUG_ON(!wiphy); 1703fe33eb39SLuis R. Rodriguez 1704fe33eb39SLuis R. Rodriguez request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); 1705fe33eb39SLuis R. Rodriguez if (!request) 1706fe33eb39SLuis R. Rodriguez return -ENOMEM; 1707fe33eb39SLuis R. Rodriguez 1708fe33eb39SLuis R. Rodriguez request->wiphy_idx = get_wiphy_idx(wiphy); 1709fe33eb39SLuis R. Rodriguez 1710fe33eb39SLuis R. Rodriguez /* Must have registered wiphy first */ 1711fe33eb39SLuis R. Rodriguez BUG_ON(!wiphy_idx_valid(request->wiphy_idx)); 1712fe33eb39SLuis R. Rodriguez 1713fe33eb39SLuis R. Rodriguez request->alpha2[0] = alpha2[0]; 1714fe33eb39SLuis R. Rodriguez request->alpha2[1] = alpha2[1]; 17157db90f4aSLuis R. Rodriguez request->initiator = NL80211_REGDOM_SET_BY_DRIVER; 1716fe33eb39SLuis R. Rodriguez 1717fe33eb39SLuis R. Rodriguez queue_regulatory_request(request); 1718fe33eb39SLuis R. Rodriguez 1719fe33eb39SLuis R. Rodriguez return 0; 1720b2e1b302SLuis R. Rodriguez } 1721b2e1b302SLuis R. Rodriguez EXPORT_SYMBOL(regulatory_hint); 1722b2e1b302SLuis R. Rodriguez 17233f2355cbSLuis R. Rodriguez static bool reg_same_country_ie_hint(struct wiphy *wiphy, 17243f2355cbSLuis R. Rodriguez u32 country_ie_checksum) 17253f2355cbSLuis R. Rodriguez { 1726806a9e39SLuis R. Rodriguez struct wiphy *request_wiphy; 1727806a9e39SLuis R. Rodriguez 1728761cf7ecSLuis R. Rodriguez assert_cfg80211_lock(); 1729761cf7ecSLuis R. Rodriguez 1730cc0b6fe8SLuis R. Rodriguez if (unlikely(last_request->initiator != 1731cc0b6fe8SLuis R. Rodriguez NL80211_REGDOM_SET_BY_COUNTRY_IE)) 1732cc0b6fe8SLuis R. Rodriguez return false; 1733cc0b6fe8SLuis R. Rodriguez 1734806a9e39SLuis R. Rodriguez request_wiphy = wiphy_idx_to_wiphy(last_request->wiphy_idx); 1735806a9e39SLuis R. Rodriguez 1736806a9e39SLuis R. Rodriguez if (!request_wiphy) 17373f2355cbSLuis R. Rodriguez return false; 1738806a9e39SLuis R. Rodriguez 1739806a9e39SLuis R. Rodriguez if (likely(request_wiphy != wiphy)) 17403f2355cbSLuis R. Rodriguez return !country_ie_integrity_changes(country_ie_checksum); 1741fb1fc7adSLuis R. Rodriguez /* 1742fb1fc7adSLuis R. Rodriguez * We should not have let these through at this point, they 17433f2355cbSLuis R. Rodriguez * should have been picked up earlier by the first alpha2 check 1744fb1fc7adSLuis R. Rodriguez * on the device 1745fb1fc7adSLuis R. Rodriguez */ 17463f2355cbSLuis R. Rodriguez if (WARN_ON(!country_ie_integrity_changes(country_ie_checksum))) 17473f2355cbSLuis R. Rodriguez return true; 17483f2355cbSLuis R. Rodriguez return false; 17493f2355cbSLuis R. Rodriguez } 17503f2355cbSLuis R. Rodriguez 17513f2355cbSLuis R. Rodriguez void regulatory_hint_11d(struct wiphy *wiphy, 17523f2355cbSLuis R. Rodriguez u8 *country_ie, 17533f2355cbSLuis R. Rodriguez u8 country_ie_len) 17543f2355cbSLuis R. Rodriguez { 17553f2355cbSLuis R. Rodriguez struct ieee80211_regdomain *rd = NULL; 17563f2355cbSLuis R. Rodriguez char alpha2[2]; 17573f2355cbSLuis R. Rodriguez u32 checksum = 0; 17583f2355cbSLuis R. Rodriguez enum environment_cap env = ENVIRON_ANY; 1759fe33eb39SLuis R. Rodriguez struct regulatory_request *request; 17603f2355cbSLuis R. Rodriguez 1761a1794390SLuis R. Rodriguez mutex_lock(&cfg80211_mutex); 17623f2355cbSLuis R. Rodriguez 1763d335fe63SLuis R. Rodriguez if (unlikely(!last_request)) { 1764d335fe63SLuis R. Rodriguez mutex_unlock(&cfg80211_mutex); 1765d335fe63SLuis R. Rodriguez return; 1766d335fe63SLuis R. Rodriguez } 1767d335fe63SLuis R. Rodriguez 17683f2355cbSLuis R. Rodriguez /* IE len must be evenly divisible by 2 */ 17693f2355cbSLuis R. Rodriguez if (country_ie_len & 0x01) 17703f2355cbSLuis R. Rodriguez goto out; 17713f2355cbSLuis R. Rodriguez 17723f2355cbSLuis R. Rodriguez if (country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN) 17733f2355cbSLuis R. Rodriguez goto out; 17743f2355cbSLuis R. Rodriguez 1775fb1fc7adSLuis R. Rodriguez /* 1776fb1fc7adSLuis R. Rodriguez * Pending country IE processing, this can happen after we 17773f2355cbSLuis R. Rodriguez * call CRDA and wait for a response if a beacon was received before 1778fb1fc7adSLuis R. Rodriguez * we were able to process the last regulatory_hint_11d() call 1779fb1fc7adSLuis R. Rodriguez */ 17803f2355cbSLuis R. Rodriguez if (country_ie_regdomain) 17813f2355cbSLuis R. Rodriguez goto out; 17823f2355cbSLuis R. Rodriguez 17833f2355cbSLuis R. Rodriguez alpha2[0] = country_ie[0]; 17843f2355cbSLuis R. Rodriguez alpha2[1] = country_ie[1]; 17853f2355cbSLuis R. Rodriguez 17863f2355cbSLuis R. Rodriguez if (country_ie[2] == 'I') 17873f2355cbSLuis R. Rodriguez env = ENVIRON_INDOOR; 17883f2355cbSLuis R. Rodriguez else if (country_ie[2] == 'O') 17893f2355cbSLuis R. Rodriguez env = ENVIRON_OUTDOOR; 17903f2355cbSLuis R. Rodriguez 1791fb1fc7adSLuis R. Rodriguez /* 1792fb1fc7adSLuis R. Rodriguez * We will run this for *every* beacon processed for the BSSID, so 17933f2355cbSLuis R. Rodriguez * we optimize an early check to exit out early if we don't have to 1794fb1fc7adSLuis R. Rodriguez * do anything 1795fb1fc7adSLuis R. Rodriguez */ 1796cc0b6fe8SLuis R. Rodriguez if (likely(last_request->initiator == 1797cc0b6fe8SLuis R. Rodriguez NL80211_REGDOM_SET_BY_COUNTRY_IE && 1798cc0b6fe8SLuis R. Rodriguez wiphy_idx_valid(last_request->wiphy_idx))) { 17993f2355cbSLuis R. Rodriguez struct cfg80211_registered_device *drv_last_ie; 18003f2355cbSLuis R. Rodriguez 1801806a9e39SLuis R. Rodriguez drv_last_ie = 1802806a9e39SLuis R. Rodriguez cfg80211_drv_by_wiphy_idx(last_request->wiphy_idx); 18033f2355cbSLuis R. Rodriguez 1804fb1fc7adSLuis R. Rodriguez /* 1805fb1fc7adSLuis R. Rodriguez * Lets keep this simple -- we trust the first AP 1806fb1fc7adSLuis R. Rodriguez * after we intersect with CRDA 1807fb1fc7adSLuis R. Rodriguez */ 1808806a9e39SLuis R. Rodriguez if (likely(&drv_last_ie->wiphy == wiphy)) { 1809fb1fc7adSLuis R. Rodriguez /* 1810fb1fc7adSLuis R. Rodriguez * Ignore IEs coming in on this wiphy with 1811fb1fc7adSLuis R. Rodriguez * the same alpha2 and environment cap 1812fb1fc7adSLuis R. Rodriguez */ 18133f2355cbSLuis R. Rodriguez if (likely(alpha2_equal(drv_last_ie->country_ie_alpha2, 18143f2355cbSLuis R. Rodriguez alpha2) && 18153f2355cbSLuis R. Rodriguez env == drv_last_ie->env)) { 18163f2355cbSLuis R. Rodriguez goto out; 18173f2355cbSLuis R. Rodriguez } 1818fb1fc7adSLuis R. Rodriguez /* 1819fb1fc7adSLuis R. Rodriguez * the wiphy moved on to another BSSID or the AP 18203f2355cbSLuis R. Rodriguez * was reconfigured. XXX: We need to deal with the 18213f2355cbSLuis R. Rodriguez * case where the user suspends and goes to goes 18223f2355cbSLuis R. Rodriguez * to another country, and then gets IEs from an 1823fb1fc7adSLuis R. Rodriguez * AP with different settings 1824fb1fc7adSLuis R. Rodriguez */ 18253f2355cbSLuis R. Rodriguez goto out; 18263f2355cbSLuis R. Rodriguez } else { 1827fb1fc7adSLuis R. Rodriguez /* 1828fb1fc7adSLuis R. Rodriguez * Ignore IEs coming in on two separate wiphys with 1829fb1fc7adSLuis R. Rodriguez * the same alpha2 and environment cap 1830fb1fc7adSLuis R. Rodriguez */ 18313f2355cbSLuis R. Rodriguez if (likely(alpha2_equal(drv_last_ie->country_ie_alpha2, 18323f2355cbSLuis R. Rodriguez alpha2) && 18333f2355cbSLuis R. Rodriguez env == drv_last_ie->env)) { 18343f2355cbSLuis R. Rodriguez goto out; 18353f2355cbSLuis R. Rodriguez } 18363f2355cbSLuis R. Rodriguez /* We could potentially intersect though */ 18373f2355cbSLuis R. Rodriguez goto out; 18383f2355cbSLuis R. Rodriguez } 18393f2355cbSLuis R. Rodriguez } 18403f2355cbSLuis R. Rodriguez 18413f2355cbSLuis R. Rodriguez rd = country_ie_2_rd(country_ie, country_ie_len, &checksum); 18423f2355cbSLuis R. Rodriguez if (!rd) 18433f2355cbSLuis R. Rodriguez goto out; 18443f2355cbSLuis R. Rodriguez 1845915278e0SLuis R. Rodriguez /* 1846915278e0SLuis R. Rodriguez * This will not happen right now but we leave it here for the 18473f2355cbSLuis R. Rodriguez * the future when we want to add suspend/resume support and having 18483f2355cbSLuis R. Rodriguez * the user move to another country after doing so, or having the user 1849915278e0SLuis R. Rodriguez * move to another AP. Right now we just trust the first AP. 1850915278e0SLuis R. Rodriguez * 1851915278e0SLuis R. Rodriguez * If we hit this before we add this support we want to be informed of 1852915278e0SLuis R. Rodriguez * it as it would indicate a mistake in the current design 1853915278e0SLuis R. Rodriguez */ 1854915278e0SLuis R. Rodriguez if (WARN_ON(reg_same_country_ie_hint(wiphy, checksum))) 18550441d6ffSLuis R. Rodriguez goto free_rd_out; 18563f2355cbSLuis R. Rodriguez 1857fe33eb39SLuis R. Rodriguez request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); 1858fe33eb39SLuis R. Rodriguez if (!request) 1859fe33eb39SLuis R. Rodriguez goto free_rd_out; 1860fe33eb39SLuis R. Rodriguez 1861fb1fc7adSLuis R. Rodriguez /* 1862fb1fc7adSLuis R. Rodriguez * We keep this around for when CRDA comes back with a response so 1863fb1fc7adSLuis R. Rodriguez * we can intersect with that 1864fb1fc7adSLuis R. Rodriguez */ 18653f2355cbSLuis R. Rodriguez country_ie_regdomain = rd; 18663f2355cbSLuis R. Rodriguez 1867fe33eb39SLuis R. Rodriguez request->wiphy_idx = get_wiphy_idx(wiphy); 1868fe33eb39SLuis R. Rodriguez request->alpha2[0] = rd->alpha2[0]; 1869fe33eb39SLuis R. Rodriguez request->alpha2[1] = rd->alpha2[1]; 18707db90f4aSLuis R. Rodriguez request->initiator = NL80211_REGDOM_SET_BY_COUNTRY_IE; 1871fe33eb39SLuis R. Rodriguez request->country_ie_checksum = checksum; 1872fe33eb39SLuis R. Rodriguez request->country_ie_env = env; 18733f2355cbSLuis R. Rodriguez 1874fe33eb39SLuis R. Rodriguez mutex_unlock(&cfg80211_mutex); 1875fe33eb39SLuis R. Rodriguez 1876fe33eb39SLuis R. Rodriguez queue_regulatory_request(request); 1877fe33eb39SLuis R. Rodriguez 1878fe33eb39SLuis R. Rodriguez return; 18790441d6ffSLuis R. Rodriguez 18800441d6ffSLuis R. Rodriguez free_rd_out: 18810441d6ffSLuis R. Rodriguez kfree(rd); 18823f2355cbSLuis R. Rodriguez out: 1883a1794390SLuis R. Rodriguez mutex_unlock(&cfg80211_mutex); 18843f2355cbSLuis R. Rodriguez } 18853f2355cbSLuis R. Rodriguez EXPORT_SYMBOL(regulatory_hint_11d); 1886b2e1b302SLuis R. Rodriguez 1887e38f8a7aSLuis R. Rodriguez static bool freq_is_chan_12_13_14(u16 freq) 1888e38f8a7aSLuis R. Rodriguez { 1889e38f8a7aSLuis R. Rodriguez if (freq == ieee80211_channel_to_frequency(12) || 1890e38f8a7aSLuis R. Rodriguez freq == ieee80211_channel_to_frequency(13) || 1891e38f8a7aSLuis R. Rodriguez freq == ieee80211_channel_to_frequency(14)) 1892e38f8a7aSLuis R. Rodriguez return true; 1893e38f8a7aSLuis R. Rodriguez return false; 1894e38f8a7aSLuis R. Rodriguez } 1895e38f8a7aSLuis R. Rodriguez 1896e38f8a7aSLuis R. Rodriguez int regulatory_hint_found_beacon(struct wiphy *wiphy, 1897e38f8a7aSLuis R. Rodriguez struct ieee80211_channel *beacon_chan, 1898e38f8a7aSLuis R. Rodriguez gfp_t gfp) 1899e38f8a7aSLuis R. Rodriguez { 1900e38f8a7aSLuis R. Rodriguez struct reg_beacon *reg_beacon; 1901e38f8a7aSLuis R. Rodriguez 1902e38f8a7aSLuis R. Rodriguez if (likely((beacon_chan->beacon_found || 1903e38f8a7aSLuis R. Rodriguez (beacon_chan->flags & IEEE80211_CHAN_RADAR) || 1904e38f8a7aSLuis R. Rodriguez (beacon_chan->band == IEEE80211_BAND_2GHZ && 1905e38f8a7aSLuis R. Rodriguez !freq_is_chan_12_13_14(beacon_chan->center_freq))))) 1906e38f8a7aSLuis R. Rodriguez return 0; 1907e38f8a7aSLuis R. Rodriguez 1908e38f8a7aSLuis R. Rodriguez reg_beacon = kzalloc(sizeof(struct reg_beacon), gfp); 1909e38f8a7aSLuis R. Rodriguez if (!reg_beacon) 1910e38f8a7aSLuis R. Rodriguez return -ENOMEM; 1911e38f8a7aSLuis R. Rodriguez 1912e38f8a7aSLuis R. Rodriguez #ifdef CONFIG_CFG80211_REG_DEBUG 1913e38f8a7aSLuis R. Rodriguez printk(KERN_DEBUG "cfg80211: Found new beacon on " 1914e38f8a7aSLuis R. Rodriguez "frequency: %d MHz (Ch %d) on %s\n", 1915e38f8a7aSLuis R. Rodriguez beacon_chan->center_freq, 1916e38f8a7aSLuis R. Rodriguez ieee80211_frequency_to_channel(beacon_chan->center_freq), 1917e38f8a7aSLuis R. Rodriguez wiphy_name(wiphy)); 1918e38f8a7aSLuis R. Rodriguez #endif 1919e38f8a7aSLuis R. Rodriguez memcpy(®_beacon->chan, beacon_chan, 1920e38f8a7aSLuis R. Rodriguez sizeof(struct ieee80211_channel)); 1921e38f8a7aSLuis R. Rodriguez 1922e38f8a7aSLuis R. Rodriguez 1923e38f8a7aSLuis R. Rodriguez /* 1924e38f8a7aSLuis R. Rodriguez * Since we can be called from BH or and non-BH context 1925e38f8a7aSLuis R. Rodriguez * we must use spin_lock_bh() 1926e38f8a7aSLuis R. Rodriguez */ 1927e38f8a7aSLuis R. Rodriguez spin_lock_bh(®_pending_beacons_lock); 1928e38f8a7aSLuis R. Rodriguez list_add_tail(®_beacon->list, ®_pending_beacons); 1929e38f8a7aSLuis R. Rodriguez spin_unlock_bh(®_pending_beacons_lock); 1930e38f8a7aSLuis R. Rodriguez 1931e38f8a7aSLuis R. Rodriguez schedule_work(®_work); 1932e38f8a7aSLuis R. Rodriguez 1933e38f8a7aSLuis R. Rodriguez return 0; 1934e38f8a7aSLuis R. Rodriguez } 1935e38f8a7aSLuis R. Rodriguez 1936a3d2eaf0SJohannes Berg static void print_rd_rules(const struct ieee80211_regdomain *rd) 1937b2e1b302SLuis R. Rodriguez { 1938b2e1b302SLuis R. Rodriguez unsigned int i; 1939a3d2eaf0SJohannes Berg const struct ieee80211_reg_rule *reg_rule = NULL; 1940a3d2eaf0SJohannes Berg const struct ieee80211_freq_range *freq_range = NULL; 1941a3d2eaf0SJohannes Berg const struct ieee80211_power_rule *power_rule = NULL; 1942b2e1b302SLuis R. Rodriguez 1943b2e1b302SLuis R. Rodriguez printk(KERN_INFO "\t(start_freq - end_freq @ bandwidth), " 1944b2e1b302SLuis R. Rodriguez "(max_antenna_gain, max_eirp)\n"); 1945b2e1b302SLuis R. Rodriguez 1946b2e1b302SLuis R. Rodriguez for (i = 0; i < rd->n_reg_rules; i++) { 1947b2e1b302SLuis R. Rodriguez reg_rule = &rd->reg_rules[i]; 1948b2e1b302SLuis R. Rodriguez freq_range = ®_rule->freq_range; 1949b2e1b302SLuis R. Rodriguez power_rule = ®_rule->power_rule; 1950b2e1b302SLuis R. Rodriguez 1951fb1fc7adSLuis R. Rodriguez /* 1952fb1fc7adSLuis R. Rodriguez * There may not be documentation for max antenna gain 1953fb1fc7adSLuis R. Rodriguez * in certain regions 1954fb1fc7adSLuis R. Rodriguez */ 1955b2e1b302SLuis R. Rodriguez if (power_rule->max_antenna_gain) 1956b2e1b302SLuis R. Rodriguez printk(KERN_INFO "\t(%d KHz - %d KHz @ %d KHz), " 1957b2e1b302SLuis R. Rodriguez "(%d mBi, %d mBm)\n", 1958b2e1b302SLuis R. Rodriguez freq_range->start_freq_khz, 1959b2e1b302SLuis R. Rodriguez freq_range->end_freq_khz, 1960b2e1b302SLuis R. Rodriguez freq_range->max_bandwidth_khz, 1961b2e1b302SLuis R. Rodriguez power_rule->max_antenna_gain, 1962b2e1b302SLuis R. Rodriguez power_rule->max_eirp); 1963b2e1b302SLuis R. Rodriguez else 1964b2e1b302SLuis R. Rodriguez printk(KERN_INFO "\t(%d KHz - %d KHz @ %d KHz), " 1965b2e1b302SLuis R. Rodriguez "(N/A, %d mBm)\n", 1966b2e1b302SLuis R. Rodriguez freq_range->start_freq_khz, 1967b2e1b302SLuis R. Rodriguez freq_range->end_freq_khz, 1968b2e1b302SLuis R. Rodriguez freq_range->max_bandwidth_khz, 1969b2e1b302SLuis R. Rodriguez power_rule->max_eirp); 1970b2e1b302SLuis R. Rodriguez } 1971b2e1b302SLuis R. Rodriguez } 1972b2e1b302SLuis R. Rodriguez 1973a3d2eaf0SJohannes Berg static void print_regdomain(const struct ieee80211_regdomain *rd) 1974b2e1b302SLuis R. Rodriguez { 1975b2e1b302SLuis R. Rodriguez 19763f2355cbSLuis R. Rodriguez if (is_intersected_alpha2(rd->alpha2)) { 19773f2355cbSLuis R. Rodriguez 19787db90f4aSLuis R. Rodriguez if (last_request->initiator == 19797db90f4aSLuis R. Rodriguez NL80211_REGDOM_SET_BY_COUNTRY_IE) { 1980806a9e39SLuis R. Rodriguez struct cfg80211_registered_device *drv; 1981806a9e39SLuis R. Rodriguez drv = cfg80211_drv_by_wiphy_idx( 1982806a9e39SLuis R. Rodriguez last_request->wiphy_idx); 1983806a9e39SLuis R. Rodriguez if (drv) { 19843f2355cbSLuis R. Rodriguez printk(KERN_INFO "cfg80211: Current regulatory " 19853f2355cbSLuis R. Rodriguez "domain updated by AP to: %c%c\n", 19863f2355cbSLuis R. Rodriguez drv->country_ie_alpha2[0], 19873f2355cbSLuis R. Rodriguez drv->country_ie_alpha2[1]); 19883f2355cbSLuis R. Rodriguez } else 19893f2355cbSLuis R. Rodriguez printk(KERN_INFO "cfg80211: Current regulatory " 19903f2355cbSLuis R. Rodriguez "domain intersected: \n"); 19913f2355cbSLuis R. Rodriguez } else 19923f2355cbSLuis R. Rodriguez printk(KERN_INFO "cfg80211: Current regulatory " 1993039498c6SLuis R. Rodriguez "domain intersected: \n"); 19943f2355cbSLuis R. Rodriguez } else if (is_world_regdom(rd->alpha2)) 1995b2e1b302SLuis R. Rodriguez printk(KERN_INFO "cfg80211: World regulatory " 1996b2e1b302SLuis R. Rodriguez "domain updated:\n"); 1997b2e1b302SLuis R. Rodriguez else { 1998b2e1b302SLuis R. Rodriguez if (is_unknown_alpha2(rd->alpha2)) 1999b2e1b302SLuis R. Rodriguez printk(KERN_INFO "cfg80211: Regulatory domain " 2000b2e1b302SLuis R. Rodriguez "changed to driver built-in settings " 2001b2e1b302SLuis R. Rodriguez "(unknown country)\n"); 2002b2e1b302SLuis R. Rodriguez else 2003b2e1b302SLuis R. Rodriguez printk(KERN_INFO "cfg80211: Regulatory domain " 2004b2e1b302SLuis R. Rodriguez "changed to country: %c%c\n", 2005b2e1b302SLuis R. Rodriguez rd->alpha2[0], rd->alpha2[1]); 2006b2e1b302SLuis R. Rodriguez } 2007b2e1b302SLuis R. Rodriguez print_rd_rules(rd); 2008b2e1b302SLuis R. Rodriguez } 2009b2e1b302SLuis R. Rodriguez 20102df78167SJohannes Berg static void print_regdomain_info(const struct ieee80211_regdomain *rd) 2011b2e1b302SLuis R. Rodriguez { 2012b2e1b302SLuis R. Rodriguez printk(KERN_INFO "cfg80211: Regulatory domain: %c%c\n", 2013b2e1b302SLuis R. Rodriguez rd->alpha2[0], rd->alpha2[1]); 2014b2e1b302SLuis R. Rodriguez print_rd_rules(rd); 2015b2e1b302SLuis R. Rodriguez } 2016b2e1b302SLuis R. Rodriguez 20173f2355cbSLuis R. Rodriguez #ifdef CONFIG_CFG80211_REG_DEBUG 20183f2355cbSLuis R. Rodriguez static void reg_country_ie_process_debug( 20193f2355cbSLuis R. Rodriguez const struct ieee80211_regdomain *rd, 20203f2355cbSLuis R. Rodriguez const struct ieee80211_regdomain *country_ie_regdomain, 20213f2355cbSLuis R. Rodriguez const struct ieee80211_regdomain *intersected_rd) 20223f2355cbSLuis R. Rodriguez { 20233f2355cbSLuis R. Rodriguez printk(KERN_DEBUG "cfg80211: Received country IE:\n"); 20243f2355cbSLuis R. Rodriguez print_regdomain_info(country_ie_regdomain); 20253f2355cbSLuis R. Rodriguez printk(KERN_DEBUG "cfg80211: CRDA thinks this should applied:\n"); 20263f2355cbSLuis R. Rodriguez print_regdomain_info(rd); 20273f2355cbSLuis R. Rodriguez if (intersected_rd) { 20283f2355cbSLuis R. Rodriguez printk(KERN_DEBUG "cfg80211: We intersect both of these " 20293f2355cbSLuis R. Rodriguez "and get:\n"); 2030667ecd01SLuis R. Rodriguez print_regdomain_info(intersected_rd); 20313f2355cbSLuis R. Rodriguez return; 20323f2355cbSLuis R. Rodriguez } 20333f2355cbSLuis R. Rodriguez printk(KERN_DEBUG "cfg80211: Intersection between both failed\n"); 20343f2355cbSLuis R. Rodriguez } 20353f2355cbSLuis R. Rodriguez #else 20363f2355cbSLuis R. Rodriguez static inline void reg_country_ie_process_debug( 20373f2355cbSLuis R. Rodriguez const struct ieee80211_regdomain *rd, 20383f2355cbSLuis R. Rodriguez const struct ieee80211_regdomain *country_ie_regdomain, 20393f2355cbSLuis R. Rodriguez const struct ieee80211_regdomain *intersected_rd) 20403f2355cbSLuis R. Rodriguez { 20413f2355cbSLuis R. Rodriguez } 20423f2355cbSLuis R. Rodriguez #endif 20433f2355cbSLuis R. Rodriguez 2044d2372b31SJohannes Berg /* Takes ownership of rd only if it doesn't fail */ 2045a3d2eaf0SJohannes Berg static int __set_regdom(const struct ieee80211_regdomain *rd) 2046b2e1b302SLuis R. Rodriguez { 20479c96477dSLuis R. Rodriguez const struct ieee80211_regdomain *intersected_rd = NULL; 20483f2355cbSLuis R. Rodriguez struct cfg80211_registered_device *drv = NULL; 2049806a9e39SLuis R. Rodriguez struct wiphy *request_wiphy; 2050b2e1b302SLuis R. Rodriguez /* Some basic sanity checks first */ 2051b2e1b302SLuis R. Rodriguez 2052b2e1b302SLuis R. Rodriguez if (is_world_regdom(rd->alpha2)) { 2053f6037d09SJohannes Berg if (WARN_ON(!reg_is_valid_request(rd->alpha2))) 2054b2e1b302SLuis R. Rodriguez return -EINVAL; 2055b2e1b302SLuis R. Rodriguez update_world_regdomain(rd); 2056b2e1b302SLuis R. Rodriguez return 0; 2057b2e1b302SLuis R. Rodriguez } 2058b2e1b302SLuis R. Rodriguez 2059b2e1b302SLuis R. Rodriguez if (!is_alpha2_set(rd->alpha2) && !is_an_alpha2(rd->alpha2) && 2060b2e1b302SLuis R. Rodriguez !is_unknown_alpha2(rd->alpha2)) 2061b2e1b302SLuis R. Rodriguez return -EINVAL; 2062b2e1b302SLuis R. Rodriguez 2063f6037d09SJohannes Berg if (!last_request) 2064b2e1b302SLuis R. Rodriguez return -EINVAL; 2065b2e1b302SLuis R. Rodriguez 2066fb1fc7adSLuis R. Rodriguez /* 2067fb1fc7adSLuis R. Rodriguez * Lets only bother proceeding on the same alpha2 if the current 20683f2355cbSLuis R. Rodriguez * rd is non static (it means CRDA was present and was used last) 2069fb1fc7adSLuis R. Rodriguez * and the pending request came in from a country IE 2070fb1fc7adSLuis R. Rodriguez */ 20717db90f4aSLuis R. Rodriguez if (last_request->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE) { 2072fb1fc7adSLuis R. Rodriguez /* 2073fb1fc7adSLuis R. Rodriguez * If someone else asked us to change the rd lets only bother 2074fb1fc7adSLuis R. Rodriguez * checking if the alpha2 changes if CRDA was already called 2075fb1fc7adSLuis R. Rodriguez */ 2076b2e1b302SLuis R. Rodriguez if (!is_old_static_regdom(cfg80211_regdomain) && 207769b1572bSLuis R. Rodriguez !regdom_changes(rd->alpha2)) 2078b2e1b302SLuis R. Rodriguez return -EINVAL; 20793f2355cbSLuis R. Rodriguez } 20803f2355cbSLuis R. Rodriguez 2081fb1fc7adSLuis R. Rodriguez /* 2082fb1fc7adSLuis R. Rodriguez * Now lets set the regulatory domain, update all driver channels 2083b2e1b302SLuis R. Rodriguez * and finally inform them of what we have done, in case they want 2084b2e1b302SLuis R. Rodriguez * to review or adjust their own settings based on their own 2085fb1fc7adSLuis R. Rodriguez * internal EEPROM data 2086fb1fc7adSLuis R. Rodriguez */ 2087b2e1b302SLuis R. Rodriguez 2088f6037d09SJohannes Berg if (WARN_ON(!reg_is_valid_request(rd->alpha2))) 2089b2e1b302SLuis R. Rodriguez return -EINVAL; 2090b2e1b302SLuis R. Rodriguez 2091b2e1b302SLuis R. Rodriguez if (!is_valid_rd(rd)) { 2092b2e1b302SLuis R. Rodriguez printk(KERN_ERR "cfg80211: Invalid " 2093b2e1b302SLuis R. Rodriguez "regulatory domain detected:\n"); 2094b2e1b302SLuis R. Rodriguez print_regdomain_info(rd); 2095b2e1b302SLuis R. Rodriguez return -EINVAL; 2096b2e1b302SLuis R. Rodriguez } 2097b2e1b302SLuis R. Rodriguez 2098806a9e39SLuis R. Rodriguez request_wiphy = wiphy_idx_to_wiphy(last_request->wiphy_idx); 2099806a9e39SLuis R. Rodriguez 2100b8295acdSLuis R. Rodriguez if (!last_request->intersect) { 21013e0c3ff3SLuis R. Rodriguez int r; 21023e0c3ff3SLuis R. Rodriguez 21037db90f4aSLuis R. Rodriguez if (last_request->initiator != NL80211_REGDOM_SET_BY_DRIVER) { 21043e0c3ff3SLuis R. Rodriguez reset_regdomains(); 21053e0c3ff3SLuis R. Rodriguez cfg80211_regdomain = rd; 21063e0c3ff3SLuis R. Rodriguez return 0; 21073e0c3ff3SLuis R. Rodriguez } 21083e0c3ff3SLuis R. Rodriguez 2109fb1fc7adSLuis R. Rodriguez /* 2110fb1fc7adSLuis R. Rodriguez * For a driver hint, lets copy the regulatory domain the 2111fb1fc7adSLuis R. Rodriguez * driver wanted to the wiphy to deal with conflicts 2112fb1fc7adSLuis R. Rodriguez */ 21133e0c3ff3SLuis R. Rodriguez 2114806a9e39SLuis R. Rodriguez BUG_ON(request_wiphy->regd); 21153e0c3ff3SLuis R. Rodriguez 2116806a9e39SLuis R. Rodriguez r = reg_copy_regd(&request_wiphy->regd, rd); 21173e0c3ff3SLuis R. Rodriguez if (r) 21183e0c3ff3SLuis R. Rodriguez return r; 21193e0c3ff3SLuis R. Rodriguez 2120b8295acdSLuis R. Rodriguez reset_regdomains(); 2121b8295acdSLuis R. Rodriguez cfg80211_regdomain = rd; 2122b8295acdSLuis R. Rodriguez return 0; 2123b8295acdSLuis R. Rodriguez } 2124b8295acdSLuis R. Rodriguez 2125b8295acdSLuis R. Rodriguez /* Intersection requires a bit more work */ 2126b8295acdSLuis R. Rodriguez 21277db90f4aSLuis R. Rodriguez if (last_request->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE) { 2128b8295acdSLuis R. Rodriguez 21299c96477dSLuis R. Rodriguez intersected_rd = regdom_intersect(rd, cfg80211_regdomain); 21309c96477dSLuis R. Rodriguez if (!intersected_rd) 21319c96477dSLuis R. Rodriguez return -EINVAL; 2132b8295acdSLuis R. Rodriguez 2133fb1fc7adSLuis R. Rodriguez /* 2134fb1fc7adSLuis R. Rodriguez * We can trash what CRDA provided now. 21353e0c3ff3SLuis R. Rodriguez * However if a driver requested this specific regulatory 2136fb1fc7adSLuis R. Rodriguez * domain we keep it for its private use 2137fb1fc7adSLuis R. Rodriguez */ 21387db90f4aSLuis R. Rodriguez if (last_request->initiator == NL80211_REGDOM_SET_BY_DRIVER) 2139806a9e39SLuis R. Rodriguez request_wiphy->regd = rd; 21403e0c3ff3SLuis R. Rodriguez else 21419c96477dSLuis R. Rodriguez kfree(rd); 21423e0c3ff3SLuis R. Rodriguez 2143b8295acdSLuis R. Rodriguez rd = NULL; 2144b8295acdSLuis R. Rodriguez 2145b8295acdSLuis R. Rodriguez reset_regdomains(); 2146b8295acdSLuis R. Rodriguez cfg80211_regdomain = intersected_rd; 2147b8295acdSLuis R. Rodriguez 2148b8295acdSLuis R. Rodriguez return 0; 21499c96477dSLuis R. Rodriguez } 21509c96477dSLuis R. Rodriguez 21513f2355cbSLuis R. Rodriguez /* 21523f2355cbSLuis R. Rodriguez * Country IE requests are handled a bit differently, we intersect 21533f2355cbSLuis R. Rodriguez * the country IE rd with what CRDA believes that country should have 21543f2355cbSLuis R. Rodriguez */ 21553f2355cbSLuis R. Rodriguez 21563f2355cbSLuis R. Rodriguez BUG_ON(!country_ie_regdomain); 215786f04680SLuis R. Rodriguez BUG_ON(rd == country_ie_regdomain); 21583f2355cbSLuis R. Rodriguez 2159fb1fc7adSLuis R. Rodriguez /* 2160fb1fc7adSLuis R. Rodriguez * Intersect what CRDA returned and our what we 2161fb1fc7adSLuis R. Rodriguez * had built from the Country IE received 2162fb1fc7adSLuis R. Rodriguez */ 21633f2355cbSLuis R. Rodriguez 21643f2355cbSLuis R. Rodriguez intersected_rd = regdom_intersect(rd, country_ie_regdomain); 21653f2355cbSLuis R. Rodriguez 216686f04680SLuis R. Rodriguez reg_country_ie_process_debug(rd, 216786f04680SLuis R. Rodriguez country_ie_regdomain, 21683f2355cbSLuis R. Rodriguez intersected_rd); 21693f2355cbSLuis R. Rodriguez 21703f2355cbSLuis R. Rodriguez kfree(country_ie_regdomain); 21713f2355cbSLuis R. Rodriguez country_ie_regdomain = NULL; 21723f2355cbSLuis R. Rodriguez 21733f2355cbSLuis R. Rodriguez if (!intersected_rd) 21743f2355cbSLuis R. Rodriguez return -EINVAL; 21753f2355cbSLuis R. Rodriguez 2176806a9e39SLuis R. Rodriguez drv = wiphy_to_dev(request_wiphy); 21773f2355cbSLuis R. Rodriguez 21783f2355cbSLuis R. Rodriguez drv->country_ie_alpha2[0] = rd->alpha2[0]; 21793f2355cbSLuis R. Rodriguez drv->country_ie_alpha2[1] = rd->alpha2[1]; 21803f2355cbSLuis R. Rodriguez drv->env = last_request->country_ie_env; 21813f2355cbSLuis R. Rodriguez 21823f2355cbSLuis R. Rodriguez BUG_ON(intersected_rd == rd); 21833f2355cbSLuis R. Rodriguez 21843f2355cbSLuis R. Rodriguez kfree(rd); 21853f2355cbSLuis R. Rodriguez rd = NULL; 21863f2355cbSLuis R. Rodriguez 2187b8295acdSLuis R. Rodriguez reset_regdomains(); 21883f2355cbSLuis R. Rodriguez cfg80211_regdomain = intersected_rd; 2189b2e1b302SLuis R. Rodriguez 2190b2e1b302SLuis R. Rodriguez return 0; 2191b2e1b302SLuis R. Rodriguez } 2192b2e1b302SLuis R. Rodriguez 2193b2e1b302SLuis R. Rodriguez 2194fb1fc7adSLuis R. Rodriguez /* 2195fb1fc7adSLuis R. Rodriguez * Use this call to set the current regulatory domain. Conflicts with 2196b2e1b302SLuis R. Rodriguez * multiple drivers can be ironed out later. Caller must've already 2197fb1fc7adSLuis R. Rodriguez * kmalloc'd the rd structure. Caller must hold cfg80211_mutex 2198fb1fc7adSLuis R. Rodriguez */ 2199a3d2eaf0SJohannes Berg int set_regdom(const struct ieee80211_regdomain *rd) 2200b2e1b302SLuis R. Rodriguez { 2201b2e1b302SLuis R. Rodriguez int r; 2202b2e1b302SLuis R. Rodriguez 2203761cf7ecSLuis R. Rodriguez assert_cfg80211_lock(); 2204761cf7ecSLuis R. Rodriguez 2205b2e1b302SLuis R. Rodriguez /* Note that this doesn't update the wiphys, this is done below */ 2206b2e1b302SLuis R. Rodriguez r = __set_regdom(rd); 2207d2372b31SJohannes Berg if (r) { 2208d2372b31SJohannes Berg kfree(rd); 2209b2e1b302SLuis R. Rodriguez return r; 2210d2372b31SJohannes Berg } 2211b2e1b302SLuis R. Rodriguez 2212b2e1b302SLuis R. Rodriguez /* This would make this whole thing pointless */ 2213a01ddafdSLuis R. Rodriguez if (!last_request->intersect) 2214b2e1b302SLuis R. Rodriguez BUG_ON(rd != cfg80211_regdomain); 2215b2e1b302SLuis R. Rodriguez 2216b2e1b302SLuis R. Rodriguez /* update all wiphys now with the new established regulatory domain */ 2217f6037d09SJohannes Berg update_all_wiphy_regulatory(last_request->initiator); 2218b2e1b302SLuis R. Rodriguez 2219a01ddafdSLuis R. Rodriguez print_regdomain(cfg80211_regdomain); 2220b2e1b302SLuis R. Rodriguez 222173d54c9eSLuis R. Rodriguez nl80211_send_reg_change_event(last_request); 222273d54c9eSLuis R. Rodriguez 2223b2e1b302SLuis R. Rodriguez return r; 2224b2e1b302SLuis R. Rodriguez } 2225b2e1b302SLuis R. Rodriguez 2226a1794390SLuis R. Rodriguez /* Caller must hold cfg80211_mutex */ 22273f2355cbSLuis R. Rodriguez void reg_device_remove(struct wiphy *wiphy) 22283f2355cbSLuis R. Rodriguez { 22290ad8acafSLuis R. Rodriguez struct wiphy *request_wiphy = NULL; 2230806a9e39SLuis R. Rodriguez 2231761cf7ecSLuis R. Rodriguez assert_cfg80211_lock(); 2232761cf7ecSLuis R. Rodriguez 22330ef9ccddSChris Wright kfree(wiphy->regd); 22340ef9ccddSChris Wright 22350ad8acafSLuis R. Rodriguez if (last_request) 2236806a9e39SLuis R. Rodriguez request_wiphy = wiphy_idx_to_wiphy(last_request->wiphy_idx); 2237806a9e39SLuis R. Rodriguez 22380ef9ccddSChris Wright if (!request_wiphy || request_wiphy != wiphy) 22393f2355cbSLuis R. Rodriguez return; 22400ef9ccddSChris Wright 2241806a9e39SLuis R. Rodriguez last_request->wiphy_idx = WIPHY_IDX_STALE; 22423f2355cbSLuis R. Rodriguez last_request->country_ie_env = ENVIRON_ANY; 22433f2355cbSLuis R. Rodriguez } 22443f2355cbSLuis R. Rodriguez 2245b2e1b302SLuis R. Rodriguez int regulatory_init(void) 2246b2e1b302SLuis R. Rodriguez { 2247bcf4f99bSLuis R. Rodriguez int err = 0; 2248734366deSJohannes Berg 2249b2e1b302SLuis R. Rodriguez reg_pdev = platform_device_register_simple("regulatory", 0, NULL, 0); 2250b2e1b302SLuis R. Rodriguez if (IS_ERR(reg_pdev)) 2251b2e1b302SLuis R. Rodriguez return PTR_ERR(reg_pdev); 2252734366deSJohannes Berg 2253fe33eb39SLuis R. Rodriguez spin_lock_init(®_requests_lock); 2254e38f8a7aSLuis R. Rodriguez spin_lock_init(®_pending_beacons_lock); 2255fe33eb39SLuis R. Rodriguez 2256734366deSJohannes Berg #ifdef CONFIG_WIRELESS_OLD_REGULATORY 2257a3d2eaf0SJohannes Berg cfg80211_regdomain = static_regdom(ieee80211_regdom); 2258734366deSJohannes Berg 2259942b25cfSJohannes Berg printk(KERN_INFO "cfg80211: Using static regulatory domain info\n"); 2260734366deSJohannes Berg print_regdomain_info(cfg80211_regdomain); 2261fb1fc7adSLuis R. Rodriguez /* 2262fb1fc7adSLuis R. Rodriguez * The old code still requests for a new regdomain and if 2263734366deSJohannes Berg * you have CRDA you get it updated, otherwise you get 22642e097dc6SLuis R. Rodriguez * stuck with the static values. Since "EU" is not a valid 22652e097dc6SLuis R. Rodriguez * ISO / IEC 3166 alpha2 code we can't expect userpace to 22662e097dc6SLuis R. Rodriguez * give us a regulatory domain for it. We need last_request 22672e097dc6SLuis R. Rodriguez * iniitalized though so lets just send a request which we 22682e097dc6SLuis R. Rodriguez * know will be ignored... this crap will be removed once 22692e097dc6SLuis R. Rodriguez * OLD_REG dies. 2270fb1fc7adSLuis R. Rodriguez */ 2271ba25c141SLuis R. Rodriguez err = regulatory_hint_core(ieee80211_regdom); 2272734366deSJohannes Berg #else 2273a3d2eaf0SJohannes Berg cfg80211_regdomain = cfg80211_world_regdom; 2274734366deSJohannes Berg 22756ee7d330SLuis R. Rodriguez err = regulatory_hint_core(ieee80211_regdom); 2276734366deSJohannes Berg #endif 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 2295b2e1b302SLuis R. Rodriguez return 0; 2296b2e1b302SLuis R. Rodriguez } 2297b2e1b302SLuis R. Rodriguez 2298b2e1b302SLuis R. Rodriguez void regulatory_exit(void) 2299b2e1b302SLuis R. Rodriguez { 2300fe33eb39SLuis R. Rodriguez struct regulatory_request *reg_request, *tmp; 2301e38f8a7aSLuis R. Rodriguez struct reg_beacon *reg_beacon, *btmp; 2302fe33eb39SLuis R. Rodriguez 2303fe33eb39SLuis R. Rodriguez cancel_work_sync(®_work); 2304fe33eb39SLuis R. Rodriguez 2305a1794390SLuis R. Rodriguez mutex_lock(&cfg80211_mutex); 2306734366deSJohannes Berg 2307b2e1b302SLuis R. Rodriguez reset_regdomains(); 2308734366deSJohannes Berg 23093f2355cbSLuis R. Rodriguez kfree(country_ie_regdomain); 23103f2355cbSLuis R. Rodriguez country_ie_regdomain = NULL; 23113f2355cbSLuis R. Rodriguez 2312f6037d09SJohannes Berg kfree(last_request); 2313f6037d09SJohannes Berg 2314b2e1b302SLuis R. Rodriguez platform_device_unregister(reg_pdev); 2315734366deSJohannes Berg 2316e38f8a7aSLuis R. Rodriguez spin_lock_bh(®_pending_beacons_lock); 2317e38f8a7aSLuis R. Rodriguez if (!list_empty(®_pending_beacons)) { 2318e38f8a7aSLuis R. Rodriguez list_for_each_entry_safe(reg_beacon, btmp, 2319e38f8a7aSLuis R. Rodriguez ®_pending_beacons, list) { 2320e38f8a7aSLuis R. Rodriguez list_del(®_beacon->list); 2321e38f8a7aSLuis R. Rodriguez kfree(reg_beacon); 2322e38f8a7aSLuis R. Rodriguez } 2323e38f8a7aSLuis R. Rodriguez } 2324e38f8a7aSLuis R. Rodriguez spin_unlock_bh(®_pending_beacons_lock); 2325e38f8a7aSLuis R. Rodriguez 2326e38f8a7aSLuis R. Rodriguez if (!list_empty(®_beacon_list)) { 2327e38f8a7aSLuis R. Rodriguez list_for_each_entry_safe(reg_beacon, btmp, 2328e38f8a7aSLuis R. Rodriguez ®_beacon_list, list) { 2329e38f8a7aSLuis R. Rodriguez list_del(®_beacon->list); 2330e38f8a7aSLuis R. Rodriguez kfree(reg_beacon); 2331e38f8a7aSLuis R. Rodriguez } 2332e38f8a7aSLuis R. Rodriguez } 2333e38f8a7aSLuis R. Rodriguez 2334fe33eb39SLuis R. Rodriguez spin_lock(®_requests_lock); 2335fe33eb39SLuis R. Rodriguez if (!list_empty(®_requests_list)) { 2336fe33eb39SLuis R. Rodriguez list_for_each_entry_safe(reg_request, tmp, 2337fe33eb39SLuis R. Rodriguez ®_requests_list, list) { 2338fe33eb39SLuis R. Rodriguez list_del(®_request->list); 2339fe33eb39SLuis R. Rodriguez kfree(reg_request); 2340fe33eb39SLuis R. Rodriguez } 2341fe33eb39SLuis R. Rodriguez } 2342fe33eb39SLuis R. Rodriguez spin_unlock(®_requests_lock); 2343fe33eb39SLuis R. Rodriguez 2344a1794390SLuis R. Rodriguez mutex_unlock(&cfg80211_mutex); 23458318d78aSJohannes Berg } 2346