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 { 38561405e97SLuis R. Rodriguez assert_cfg80211_lock(); 38661405e97SLuis R. Rodriguez 387f6037d09SJohannes Berg if (!last_request) 388f6037d09SJohannes Berg return false; 389f6037d09SJohannes Berg 390f6037d09SJohannes Berg return alpha2_equal(last_request->alpha2, alpha2); 391b2e1b302SLuis R. Rodriguez } 392b2e1b302SLuis R. Rodriguez 393b2e1b302SLuis R. Rodriguez /* Sanity check on a regulatory rule */ 394a3d2eaf0SJohannes Berg static bool is_valid_reg_rule(const struct ieee80211_reg_rule *rule) 395b2e1b302SLuis R. Rodriguez { 396a3d2eaf0SJohannes Berg const struct ieee80211_freq_range *freq_range = &rule->freq_range; 397b2e1b302SLuis R. Rodriguez u32 freq_diff; 398b2e1b302SLuis R. Rodriguez 39991e99004SLuis R. Rodriguez if (freq_range->start_freq_khz <= 0 || freq_range->end_freq_khz <= 0) 400b2e1b302SLuis R. Rodriguez return false; 401b2e1b302SLuis R. Rodriguez 402b2e1b302SLuis R. Rodriguez if (freq_range->start_freq_khz > freq_range->end_freq_khz) 403b2e1b302SLuis R. Rodriguez return false; 404b2e1b302SLuis R. Rodriguez 405b2e1b302SLuis R. Rodriguez freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz; 406b2e1b302SLuis R. Rodriguez 407bd05f28eSRoel Kluin if (freq_range->end_freq_khz <= freq_range->start_freq_khz || 408bd05f28eSRoel Kluin freq_range->max_bandwidth_khz > freq_diff) 409b2e1b302SLuis R. Rodriguez return false; 410b2e1b302SLuis R. Rodriguez 411b2e1b302SLuis R. Rodriguez return true; 412b2e1b302SLuis R. Rodriguez } 413b2e1b302SLuis R. Rodriguez 414a3d2eaf0SJohannes Berg static bool is_valid_rd(const struct ieee80211_regdomain *rd) 415b2e1b302SLuis R. Rodriguez { 416a3d2eaf0SJohannes Berg const struct ieee80211_reg_rule *reg_rule = NULL; 417b2e1b302SLuis R. Rodriguez unsigned int i; 418b2e1b302SLuis R. Rodriguez 419b2e1b302SLuis R. Rodriguez if (!rd->n_reg_rules) 420b2e1b302SLuis R. Rodriguez return false; 421b2e1b302SLuis R. Rodriguez 42288dc1c3fSLuis R. Rodriguez if (WARN_ON(rd->n_reg_rules > NL80211_MAX_SUPP_REG_RULES)) 42388dc1c3fSLuis R. Rodriguez return false; 42488dc1c3fSLuis R. Rodriguez 425b2e1b302SLuis R. Rodriguez for (i = 0; i < rd->n_reg_rules; i++) { 426b2e1b302SLuis R. Rodriguez reg_rule = &rd->reg_rules[i]; 427b2e1b302SLuis R. Rodriguez if (!is_valid_reg_rule(reg_rule)) 428b2e1b302SLuis R. Rodriguez return false; 429b2e1b302SLuis R. Rodriguez } 430b2e1b302SLuis R. Rodriguez 431b2e1b302SLuis R. Rodriguez return true; 432b2e1b302SLuis R. Rodriguez } 433b2e1b302SLuis R. Rodriguez 434038659e7SLuis R. Rodriguez static bool reg_does_bw_fit(const struct ieee80211_freq_range *freq_range, 435038659e7SLuis R. Rodriguez u32 center_freq_khz, 436038659e7SLuis R. Rodriguez u32 bw_khz) 437b2e1b302SLuis R. Rodriguez { 438038659e7SLuis R. Rodriguez u32 start_freq_khz, end_freq_khz; 439038659e7SLuis R. Rodriguez 440038659e7SLuis R. Rodriguez start_freq_khz = center_freq_khz - (bw_khz/2); 441038659e7SLuis R. Rodriguez end_freq_khz = center_freq_khz + (bw_khz/2); 442038659e7SLuis R. Rodriguez 443b2e1b302SLuis R. Rodriguez if (start_freq_khz >= freq_range->start_freq_khz && 444b2e1b302SLuis R. Rodriguez end_freq_khz <= freq_range->end_freq_khz) 445038659e7SLuis R. Rodriguez return true; 446038659e7SLuis R. Rodriguez 447038659e7SLuis R. Rodriguez return false; 448b2e1b302SLuis R. Rodriguez } 449b2e1b302SLuis R. Rodriguez 4500c7dc45dSLuis R. Rodriguez /** 4510c7dc45dSLuis R. Rodriguez * freq_in_rule_band - tells us if a frequency is in a frequency band 4520c7dc45dSLuis R. Rodriguez * @freq_range: frequency rule we want to query 4530c7dc45dSLuis R. Rodriguez * @freq_khz: frequency we are inquiring about 4540c7dc45dSLuis R. Rodriguez * 4550c7dc45dSLuis R. Rodriguez * This lets us know if a specific frequency rule is or is not relevant to 4560c7dc45dSLuis R. Rodriguez * a specific frequency's band. Bands are device specific and artificial 4570c7dc45dSLuis R. Rodriguez * definitions (the "2.4 GHz band" and the "5 GHz band"), however it is 4580c7dc45dSLuis R. Rodriguez * safe for now to assume that a frequency rule should not be part of a 4590c7dc45dSLuis R. Rodriguez * frequency's band if the start freq or end freq are off by more than 2 GHz. 4600c7dc45dSLuis R. Rodriguez * This resolution can be lowered and should be considered as we add 4610c7dc45dSLuis R. Rodriguez * regulatory rule support for other "bands". 4620c7dc45dSLuis R. Rodriguez **/ 4630c7dc45dSLuis R. Rodriguez static bool freq_in_rule_band(const struct ieee80211_freq_range *freq_range, 4640c7dc45dSLuis R. Rodriguez u32 freq_khz) 4650c7dc45dSLuis R. Rodriguez { 4660c7dc45dSLuis R. Rodriguez #define ONE_GHZ_IN_KHZ 1000000 4670c7dc45dSLuis R. Rodriguez if (abs(freq_khz - freq_range->start_freq_khz) <= (2 * ONE_GHZ_IN_KHZ)) 4680c7dc45dSLuis R. Rodriguez return true; 4690c7dc45dSLuis R. Rodriguez if (abs(freq_khz - freq_range->end_freq_khz) <= (2 * ONE_GHZ_IN_KHZ)) 4700c7dc45dSLuis R. Rodriguez return true; 4710c7dc45dSLuis R. Rodriguez return false; 4720c7dc45dSLuis R. Rodriguez #undef ONE_GHZ_IN_KHZ 4730c7dc45dSLuis R. Rodriguez } 4740c7dc45dSLuis R. Rodriguez 475fb1fc7adSLuis R. Rodriguez /* 476fb1fc7adSLuis R. Rodriguez * Converts a country IE to a regulatory domain. A regulatory domain 4773f2355cbSLuis R. Rodriguez * structure has a lot of information which the IE doesn't yet have, 4783f2355cbSLuis R. Rodriguez * so for the other values we use upper max values as we will intersect 479fb1fc7adSLuis R. Rodriguez * with our userspace regulatory agent to get lower bounds. 480fb1fc7adSLuis R. Rodriguez */ 4813f2355cbSLuis R. Rodriguez static struct ieee80211_regdomain *country_ie_2_rd( 4823f2355cbSLuis R. Rodriguez u8 *country_ie, 4833f2355cbSLuis R. Rodriguez u8 country_ie_len, 4843f2355cbSLuis R. Rodriguez u32 *checksum) 4853f2355cbSLuis R. Rodriguez { 4863f2355cbSLuis R. Rodriguez struct ieee80211_regdomain *rd = NULL; 4873f2355cbSLuis R. Rodriguez unsigned int i = 0; 4883f2355cbSLuis R. Rodriguez char alpha2[2]; 4893f2355cbSLuis R. Rodriguez u32 flags = 0; 4903f2355cbSLuis R. Rodriguez u32 num_rules = 0, size_of_regd = 0; 4913f2355cbSLuis R. Rodriguez u8 *triplets_start = NULL; 4923f2355cbSLuis R. Rodriguez u8 len_at_triplet = 0; 4933f2355cbSLuis R. Rodriguez /* the last channel we have registered in a subband (triplet) */ 4943f2355cbSLuis R. Rodriguez int last_sub_max_channel = 0; 4953f2355cbSLuis R. Rodriguez 4963f2355cbSLuis R. Rodriguez *checksum = 0xDEADBEEF; 4973f2355cbSLuis R. Rodriguez 4983f2355cbSLuis R. Rodriguez /* Country IE requirements */ 4993f2355cbSLuis R. Rodriguez BUG_ON(country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN || 5003f2355cbSLuis R. Rodriguez country_ie_len & 0x01); 5013f2355cbSLuis R. Rodriguez 5023f2355cbSLuis R. Rodriguez alpha2[0] = country_ie[0]; 5033f2355cbSLuis R. Rodriguez alpha2[1] = country_ie[1]; 5043f2355cbSLuis R. Rodriguez 5053f2355cbSLuis R. Rodriguez /* 5063f2355cbSLuis R. Rodriguez * Third octet can be: 5073f2355cbSLuis R. Rodriguez * 'I' - Indoor 5083f2355cbSLuis R. Rodriguez * 'O' - Outdoor 5093f2355cbSLuis R. Rodriguez * 5103f2355cbSLuis R. Rodriguez * anything else we assume is no restrictions 5113f2355cbSLuis R. Rodriguez */ 5123f2355cbSLuis R. Rodriguez if (country_ie[2] == 'I') 5133f2355cbSLuis R. Rodriguez flags = NL80211_RRF_NO_OUTDOOR; 5143f2355cbSLuis R. Rodriguez else if (country_ie[2] == 'O') 5153f2355cbSLuis R. Rodriguez flags = NL80211_RRF_NO_INDOOR; 5163f2355cbSLuis R. Rodriguez 5173f2355cbSLuis R. Rodriguez country_ie += 3; 5183f2355cbSLuis R. Rodriguez country_ie_len -= 3; 5193f2355cbSLuis R. Rodriguez 5203f2355cbSLuis R. Rodriguez triplets_start = country_ie; 5213f2355cbSLuis R. Rodriguez len_at_triplet = country_ie_len; 5223f2355cbSLuis R. Rodriguez 5233f2355cbSLuis R. Rodriguez *checksum ^= ((flags ^ alpha2[0] ^ alpha2[1]) << 8); 5243f2355cbSLuis R. Rodriguez 525fb1fc7adSLuis R. Rodriguez /* 526fb1fc7adSLuis R. Rodriguez * We need to build a reg rule for each triplet, but first we must 5273f2355cbSLuis R. Rodriguez * calculate the number of reg rules we will need. We will need one 528fb1fc7adSLuis R. Rodriguez * for each channel subband 529fb1fc7adSLuis R. Rodriguez */ 5303f2355cbSLuis R. Rodriguez while (country_ie_len >= 3) { 531615aab4bSLuis R. Rodriguez int end_channel = 0; 5323f2355cbSLuis R. Rodriguez struct ieee80211_country_ie_triplet *triplet = 5333f2355cbSLuis R. Rodriguez (struct ieee80211_country_ie_triplet *) country_ie; 5343f2355cbSLuis R. Rodriguez int cur_sub_max_channel = 0, cur_channel = 0; 5353f2355cbSLuis R. Rodriguez 5363f2355cbSLuis R. Rodriguez if (triplet->ext.reg_extension_id >= 5373f2355cbSLuis R. Rodriguez IEEE80211_COUNTRY_EXTENSION_ID) { 5383f2355cbSLuis R. Rodriguez country_ie += 3; 5393f2355cbSLuis R. Rodriguez country_ie_len -= 3; 5403f2355cbSLuis R. Rodriguez continue; 5413f2355cbSLuis R. Rodriguez } 5423f2355cbSLuis R. Rodriguez 543615aab4bSLuis R. Rodriguez /* 2 GHz */ 544615aab4bSLuis R. Rodriguez if (triplet->chans.first_channel <= 14) 545615aab4bSLuis R. Rodriguez end_channel = triplet->chans.first_channel + 546615aab4bSLuis R. Rodriguez triplet->chans.num_channels; 547615aab4bSLuis R. Rodriguez else 548615aab4bSLuis R. Rodriguez /* 549615aab4bSLuis R. Rodriguez * 5 GHz -- For example in country IEs if the first 550615aab4bSLuis R. Rodriguez * channel given is 36 and the number of channels is 4 551615aab4bSLuis R. Rodriguez * then the individual channel numbers defined for the 552615aab4bSLuis R. Rodriguez * 5 GHz PHY by these parameters are: 36, 40, 44, and 48 553615aab4bSLuis R. Rodriguez * and not 36, 37, 38, 39. 554615aab4bSLuis R. Rodriguez * 555615aab4bSLuis R. Rodriguez * See: http://tinyurl.com/11d-clarification 556615aab4bSLuis R. Rodriguez */ 557615aab4bSLuis R. Rodriguez end_channel = triplet->chans.first_channel + 558615aab4bSLuis R. Rodriguez (4 * (triplet->chans.num_channels - 1)); 559615aab4bSLuis R. Rodriguez 5603f2355cbSLuis R. Rodriguez cur_channel = triplet->chans.first_channel; 561615aab4bSLuis R. Rodriguez cur_sub_max_channel = end_channel; 5623f2355cbSLuis R. Rodriguez 5633f2355cbSLuis R. Rodriguez /* Basic sanity check */ 5643f2355cbSLuis R. Rodriguez if (cur_sub_max_channel < cur_channel) 5653f2355cbSLuis R. Rodriguez return NULL; 5663f2355cbSLuis R. Rodriguez 567fb1fc7adSLuis R. Rodriguez /* 568fb1fc7adSLuis R. Rodriguez * Do not allow overlapping channels. Also channels 5693f2355cbSLuis R. Rodriguez * passed in each subband must be monotonically 570fb1fc7adSLuis R. Rodriguez * increasing 571fb1fc7adSLuis R. Rodriguez */ 5723f2355cbSLuis R. Rodriguez if (last_sub_max_channel) { 5733f2355cbSLuis R. Rodriguez if (cur_channel <= last_sub_max_channel) 5743f2355cbSLuis R. Rodriguez return NULL; 5753f2355cbSLuis R. Rodriguez if (cur_sub_max_channel <= last_sub_max_channel) 5763f2355cbSLuis R. Rodriguez return NULL; 5773f2355cbSLuis R. Rodriguez } 5783f2355cbSLuis R. Rodriguez 579fb1fc7adSLuis R. Rodriguez /* 580fb1fc7adSLuis R. Rodriguez * When dot11RegulatoryClassesRequired is supported 5813f2355cbSLuis R. Rodriguez * we can throw ext triplets as part of this soup, 5823f2355cbSLuis R. Rodriguez * for now we don't care when those change as we 583fb1fc7adSLuis R. Rodriguez * don't support them 584fb1fc7adSLuis R. Rodriguez */ 5853f2355cbSLuis R. Rodriguez *checksum ^= ((cur_channel ^ cur_sub_max_channel) << 8) | 5863f2355cbSLuis R. Rodriguez ((cur_sub_max_channel ^ cur_sub_max_channel) << 16) | 5873f2355cbSLuis R. Rodriguez ((triplet->chans.max_power ^ cur_sub_max_channel) << 24); 5883f2355cbSLuis R. Rodriguez 5893f2355cbSLuis R. Rodriguez last_sub_max_channel = cur_sub_max_channel; 5903f2355cbSLuis R. Rodriguez 5913f2355cbSLuis R. Rodriguez country_ie += 3; 5923f2355cbSLuis R. Rodriguez country_ie_len -= 3; 5933f2355cbSLuis R. Rodriguez num_rules++; 5943f2355cbSLuis R. Rodriguez 595fb1fc7adSLuis R. Rodriguez /* 596fb1fc7adSLuis R. Rodriguez * Note: this is not a IEEE requirement but 597fb1fc7adSLuis R. Rodriguez * simply a memory requirement 598fb1fc7adSLuis R. Rodriguez */ 5993f2355cbSLuis R. Rodriguez if (num_rules > NL80211_MAX_SUPP_REG_RULES) 6003f2355cbSLuis R. Rodriguez return NULL; 6013f2355cbSLuis R. Rodriguez } 6023f2355cbSLuis R. Rodriguez 6033f2355cbSLuis R. Rodriguez country_ie = triplets_start; 6043f2355cbSLuis R. Rodriguez country_ie_len = len_at_triplet; 6053f2355cbSLuis R. Rodriguez 6063f2355cbSLuis R. Rodriguez size_of_regd = sizeof(struct ieee80211_regdomain) + 6073f2355cbSLuis R. Rodriguez (num_rules * sizeof(struct ieee80211_reg_rule)); 6083f2355cbSLuis R. Rodriguez 6093f2355cbSLuis R. Rodriguez rd = kzalloc(size_of_regd, GFP_KERNEL); 6103f2355cbSLuis R. Rodriguez if (!rd) 6113f2355cbSLuis R. Rodriguez return NULL; 6123f2355cbSLuis R. Rodriguez 6133f2355cbSLuis R. Rodriguez rd->n_reg_rules = num_rules; 6143f2355cbSLuis R. Rodriguez rd->alpha2[0] = alpha2[0]; 6153f2355cbSLuis R. Rodriguez rd->alpha2[1] = alpha2[1]; 6163f2355cbSLuis R. Rodriguez 6173f2355cbSLuis R. Rodriguez /* This time around we fill in the rd */ 6183f2355cbSLuis R. Rodriguez while (country_ie_len >= 3) { 61902e68a3dSLuis R. Rodriguez int end_channel = 0; 6203f2355cbSLuis R. Rodriguez struct ieee80211_country_ie_triplet *triplet = 6213f2355cbSLuis R. Rodriguez (struct ieee80211_country_ie_triplet *) country_ie; 6223f2355cbSLuis R. Rodriguez struct ieee80211_reg_rule *reg_rule = NULL; 6233f2355cbSLuis R. Rodriguez struct ieee80211_freq_range *freq_range = NULL; 6243f2355cbSLuis R. Rodriguez struct ieee80211_power_rule *power_rule = NULL; 6253f2355cbSLuis R. Rodriguez 626fb1fc7adSLuis R. Rodriguez /* 627fb1fc7adSLuis R. Rodriguez * Must parse if dot11RegulatoryClassesRequired is true, 628fb1fc7adSLuis R. Rodriguez * we don't support this yet 629fb1fc7adSLuis R. Rodriguez */ 6303f2355cbSLuis R. Rodriguez if (triplet->ext.reg_extension_id >= 6313f2355cbSLuis R. Rodriguez IEEE80211_COUNTRY_EXTENSION_ID) { 6323f2355cbSLuis R. Rodriguez country_ie += 3; 6333f2355cbSLuis R. Rodriguez country_ie_len -= 3; 6343f2355cbSLuis R. Rodriguez continue; 6353f2355cbSLuis R. Rodriguez } 6363f2355cbSLuis R. Rodriguez 6373f2355cbSLuis R. Rodriguez reg_rule = &rd->reg_rules[i]; 6383f2355cbSLuis R. Rodriguez freq_range = ®_rule->freq_range; 6393f2355cbSLuis R. Rodriguez power_rule = ®_rule->power_rule; 6403f2355cbSLuis R. Rodriguez 6413f2355cbSLuis R. Rodriguez reg_rule->flags = flags; 6423f2355cbSLuis R. Rodriguez 64302e68a3dSLuis R. Rodriguez /* 2 GHz */ 64402e68a3dSLuis R. Rodriguez if (triplet->chans.first_channel <= 14) 64502e68a3dSLuis R. Rodriguez end_channel = triplet->chans.first_channel + 64602e68a3dSLuis R. Rodriguez triplet->chans.num_channels; 64702e68a3dSLuis R. Rodriguez else 64802e68a3dSLuis R. Rodriguez end_channel = triplet->chans.first_channel + 64902e68a3dSLuis R. Rodriguez (4 * (triplet->chans.num_channels - 1)); 65002e68a3dSLuis R. Rodriguez 651fb1fc7adSLuis R. Rodriguez /* 652fb1fc7adSLuis R. Rodriguez * The +10 is since the regulatory domain expects 6533f2355cbSLuis R. Rodriguez * the actual band edge, not the center of freq for 6543f2355cbSLuis R. Rodriguez * its start and end freqs, assuming 20 MHz bandwidth on 655fb1fc7adSLuis R. Rodriguez * the channels passed 656fb1fc7adSLuis R. Rodriguez */ 6573f2355cbSLuis R. Rodriguez freq_range->start_freq_khz = 6583f2355cbSLuis R. Rodriguez MHZ_TO_KHZ(ieee80211_channel_to_frequency( 6593f2355cbSLuis R. Rodriguez triplet->chans.first_channel) - 10); 6603f2355cbSLuis R. Rodriguez freq_range->end_freq_khz = 6613f2355cbSLuis R. Rodriguez MHZ_TO_KHZ(ieee80211_channel_to_frequency( 66202e68a3dSLuis R. Rodriguez end_channel) + 10); 6633f2355cbSLuis R. Rodriguez 664fb1fc7adSLuis R. Rodriguez /* 665fb1fc7adSLuis R. Rodriguez * These are large arbitrary values we use to intersect later. 666fb1fc7adSLuis R. Rodriguez * Increment this if we ever support >= 40 MHz channels 667fb1fc7adSLuis R. Rodriguez * in IEEE 802.11 668fb1fc7adSLuis R. Rodriguez */ 6693f2355cbSLuis R. Rodriguez freq_range->max_bandwidth_khz = MHZ_TO_KHZ(40); 6703f2355cbSLuis R. Rodriguez power_rule->max_antenna_gain = DBI_TO_MBI(100); 6713f2355cbSLuis R. Rodriguez power_rule->max_eirp = DBM_TO_MBM(100); 6723f2355cbSLuis R. Rodriguez 6733f2355cbSLuis R. Rodriguez country_ie += 3; 6743f2355cbSLuis R. Rodriguez country_ie_len -= 3; 6753f2355cbSLuis R. Rodriguez i++; 6763f2355cbSLuis R. Rodriguez 6773f2355cbSLuis R. Rodriguez BUG_ON(i > NL80211_MAX_SUPP_REG_RULES); 6783f2355cbSLuis R. Rodriguez } 6793f2355cbSLuis R. Rodriguez 6803f2355cbSLuis R. Rodriguez return rd; 6813f2355cbSLuis R. Rodriguez } 6823f2355cbSLuis R. Rodriguez 6833f2355cbSLuis R. Rodriguez 684fb1fc7adSLuis R. Rodriguez /* 685fb1fc7adSLuis R. Rodriguez * Helper for regdom_intersect(), this does the real 686fb1fc7adSLuis R. Rodriguez * mathematical intersection fun 687fb1fc7adSLuis R. Rodriguez */ 6889c96477dSLuis R. Rodriguez static int reg_rules_intersect( 6899c96477dSLuis R. Rodriguez const struct ieee80211_reg_rule *rule1, 6909c96477dSLuis R. Rodriguez const struct ieee80211_reg_rule *rule2, 6919c96477dSLuis R. Rodriguez struct ieee80211_reg_rule *intersected_rule) 6929c96477dSLuis R. Rodriguez { 6939c96477dSLuis R. Rodriguez const struct ieee80211_freq_range *freq_range1, *freq_range2; 6949c96477dSLuis R. Rodriguez struct ieee80211_freq_range *freq_range; 6959c96477dSLuis R. Rodriguez const struct ieee80211_power_rule *power_rule1, *power_rule2; 6969c96477dSLuis R. Rodriguez struct ieee80211_power_rule *power_rule; 6979c96477dSLuis R. Rodriguez u32 freq_diff; 6989c96477dSLuis R. Rodriguez 6999c96477dSLuis R. Rodriguez freq_range1 = &rule1->freq_range; 7009c96477dSLuis R. Rodriguez freq_range2 = &rule2->freq_range; 7019c96477dSLuis R. Rodriguez freq_range = &intersected_rule->freq_range; 7029c96477dSLuis R. Rodriguez 7039c96477dSLuis R. Rodriguez power_rule1 = &rule1->power_rule; 7049c96477dSLuis R. Rodriguez power_rule2 = &rule2->power_rule; 7059c96477dSLuis R. Rodriguez power_rule = &intersected_rule->power_rule; 7069c96477dSLuis R. Rodriguez 7079c96477dSLuis R. Rodriguez freq_range->start_freq_khz = max(freq_range1->start_freq_khz, 7089c96477dSLuis R. Rodriguez freq_range2->start_freq_khz); 7099c96477dSLuis R. Rodriguez freq_range->end_freq_khz = min(freq_range1->end_freq_khz, 7109c96477dSLuis R. Rodriguez freq_range2->end_freq_khz); 7119c96477dSLuis R. Rodriguez freq_range->max_bandwidth_khz = min(freq_range1->max_bandwidth_khz, 7129c96477dSLuis R. Rodriguez freq_range2->max_bandwidth_khz); 7139c96477dSLuis R. Rodriguez 7149c96477dSLuis R. Rodriguez freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz; 7159c96477dSLuis R. Rodriguez if (freq_range->max_bandwidth_khz > freq_diff) 7169c96477dSLuis R. Rodriguez freq_range->max_bandwidth_khz = freq_diff; 7179c96477dSLuis R. Rodriguez 7189c96477dSLuis R. Rodriguez power_rule->max_eirp = min(power_rule1->max_eirp, 7199c96477dSLuis R. Rodriguez power_rule2->max_eirp); 7209c96477dSLuis R. Rodriguez power_rule->max_antenna_gain = min(power_rule1->max_antenna_gain, 7219c96477dSLuis R. Rodriguez power_rule2->max_antenna_gain); 7229c96477dSLuis R. Rodriguez 7239c96477dSLuis R. Rodriguez intersected_rule->flags = (rule1->flags | rule2->flags); 7249c96477dSLuis R. Rodriguez 7259c96477dSLuis R. Rodriguez if (!is_valid_reg_rule(intersected_rule)) 7269c96477dSLuis R. Rodriguez return -EINVAL; 7279c96477dSLuis R. Rodriguez 7289c96477dSLuis R. Rodriguez return 0; 7299c96477dSLuis R. Rodriguez } 7309c96477dSLuis R. Rodriguez 7319c96477dSLuis R. Rodriguez /** 7329c96477dSLuis R. Rodriguez * regdom_intersect - do the intersection between two regulatory domains 7339c96477dSLuis R. Rodriguez * @rd1: first regulatory domain 7349c96477dSLuis R. Rodriguez * @rd2: second regulatory domain 7359c96477dSLuis R. Rodriguez * 7369c96477dSLuis R. Rodriguez * Use this function to get the intersection between two regulatory domains. 7379c96477dSLuis R. Rodriguez * Once completed we will mark the alpha2 for the rd as intersected, "98", 7389c96477dSLuis R. Rodriguez * as no one single alpha2 can represent this regulatory domain. 7399c96477dSLuis R. Rodriguez * 7409c96477dSLuis R. Rodriguez * Returns a pointer to the regulatory domain structure which will hold the 7419c96477dSLuis R. Rodriguez * resulting intersection of rules between rd1 and rd2. We will 7429c96477dSLuis R. Rodriguez * kzalloc() this structure for you. 7439c96477dSLuis R. Rodriguez */ 7449c96477dSLuis R. Rodriguez static struct ieee80211_regdomain *regdom_intersect( 7459c96477dSLuis R. Rodriguez const struct ieee80211_regdomain *rd1, 7469c96477dSLuis R. Rodriguez const struct ieee80211_regdomain *rd2) 7479c96477dSLuis R. Rodriguez { 7489c96477dSLuis R. Rodriguez int r, size_of_regd; 7499c96477dSLuis R. Rodriguez unsigned int x, y; 7509c96477dSLuis R. Rodriguez unsigned int num_rules = 0, rule_idx = 0; 7519c96477dSLuis R. Rodriguez const struct ieee80211_reg_rule *rule1, *rule2; 7529c96477dSLuis R. Rodriguez struct ieee80211_reg_rule *intersected_rule; 7539c96477dSLuis R. Rodriguez struct ieee80211_regdomain *rd; 7549c96477dSLuis R. Rodriguez /* This is just a dummy holder to help us count */ 7559c96477dSLuis R. Rodriguez struct ieee80211_reg_rule irule; 7569c96477dSLuis R. Rodriguez 7579c96477dSLuis R. Rodriguez /* Uses the stack temporarily for counter arithmetic */ 7589c96477dSLuis R. Rodriguez intersected_rule = &irule; 7599c96477dSLuis R. Rodriguez 7609c96477dSLuis R. Rodriguez memset(intersected_rule, 0, sizeof(struct ieee80211_reg_rule)); 7619c96477dSLuis R. Rodriguez 7629c96477dSLuis R. Rodriguez if (!rd1 || !rd2) 7639c96477dSLuis R. Rodriguez return NULL; 7649c96477dSLuis R. Rodriguez 765fb1fc7adSLuis R. Rodriguez /* 766fb1fc7adSLuis R. Rodriguez * First we get a count of the rules we'll need, then we actually 7679c96477dSLuis R. Rodriguez * build them. This is to so we can malloc() and free() a 7689c96477dSLuis R. Rodriguez * regdomain once. The reason we use reg_rules_intersect() here 7699c96477dSLuis R. Rodriguez * is it will return -EINVAL if the rule computed makes no sense. 770fb1fc7adSLuis R. Rodriguez * All rules that do check out OK are valid. 771fb1fc7adSLuis R. Rodriguez */ 7729c96477dSLuis R. Rodriguez 7739c96477dSLuis R. Rodriguez for (x = 0; x < rd1->n_reg_rules; x++) { 7749c96477dSLuis R. Rodriguez rule1 = &rd1->reg_rules[x]; 7759c96477dSLuis R. Rodriguez for (y = 0; y < rd2->n_reg_rules; y++) { 7769c96477dSLuis R. Rodriguez rule2 = &rd2->reg_rules[y]; 7779c96477dSLuis R. Rodriguez if (!reg_rules_intersect(rule1, rule2, 7789c96477dSLuis R. Rodriguez intersected_rule)) 7799c96477dSLuis R. Rodriguez num_rules++; 7809c96477dSLuis R. Rodriguez memset(intersected_rule, 0, 7819c96477dSLuis R. Rodriguez sizeof(struct ieee80211_reg_rule)); 7829c96477dSLuis R. Rodriguez } 7839c96477dSLuis R. Rodriguez } 7849c96477dSLuis R. Rodriguez 7859c96477dSLuis R. Rodriguez if (!num_rules) 7869c96477dSLuis R. Rodriguez return NULL; 7879c96477dSLuis R. Rodriguez 7889c96477dSLuis R. Rodriguez size_of_regd = sizeof(struct ieee80211_regdomain) + 7899c96477dSLuis R. Rodriguez ((num_rules + 1) * sizeof(struct ieee80211_reg_rule)); 7909c96477dSLuis R. Rodriguez 7919c96477dSLuis R. Rodriguez rd = kzalloc(size_of_regd, GFP_KERNEL); 7929c96477dSLuis R. Rodriguez if (!rd) 7939c96477dSLuis R. Rodriguez return NULL; 7949c96477dSLuis R. Rodriguez 7959c96477dSLuis R. Rodriguez for (x = 0; x < rd1->n_reg_rules; x++) { 7969c96477dSLuis R. Rodriguez rule1 = &rd1->reg_rules[x]; 7979c96477dSLuis R. Rodriguez for (y = 0; y < rd2->n_reg_rules; y++) { 7989c96477dSLuis R. Rodriguez rule2 = &rd2->reg_rules[y]; 799fb1fc7adSLuis R. Rodriguez /* 800fb1fc7adSLuis R. Rodriguez * This time around instead of using the stack lets 8019c96477dSLuis R. Rodriguez * write to the target rule directly saving ourselves 802fb1fc7adSLuis R. Rodriguez * a memcpy() 803fb1fc7adSLuis R. Rodriguez */ 8049c96477dSLuis R. Rodriguez intersected_rule = &rd->reg_rules[rule_idx]; 8059c96477dSLuis R. Rodriguez r = reg_rules_intersect(rule1, rule2, 8069c96477dSLuis R. Rodriguez intersected_rule); 807fb1fc7adSLuis R. Rodriguez /* 808fb1fc7adSLuis R. Rodriguez * No need to memset here the intersected rule here as 809fb1fc7adSLuis R. Rodriguez * we're not using the stack anymore 810fb1fc7adSLuis R. Rodriguez */ 8119c96477dSLuis R. Rodriguez if (r) 8129c96477dSLuis R. Rodriguez continue; 8139c96477dSLuis R. Rodriguez rule_idx++; 8149c96477dSLuis R. Rodriguez } 8159c96477dSLuis R. Rodriguez } 8169c96477dSLuis R. Rodriguez 8179c96477dSLuis R. Rodriguez if (rule_idx != num_rules) { 8189c96477dSLuis R. Rodriguez kfree(rd); 8199c96477dSLuis R. Rodriguez return NULL; 8209c96477dSLuis R. Rodriguez } 8219c96477dSLuis R. Rodriguez 8229c96477dSLuis R. Rodriguez rd->n_reg_rules = num_rules; 8239c96477dSLuis R. Rodriguez rd->alpha2[0] = '9'; 8249c96477dSLuis R. Rodriguez rd->alpha2[1] = '8'; 8259c96477dSLuis R. Rodriguez 8269c96477dSLuis R. Rodriguez return rd; 8279c96477dSLuis R. Rodriguez } 8289c96477dSLuis R. Rodriguez 829fb1fc7adSLuis R. Rodriguez /* 830fb1fc7adSLuis R. Rodriguez * XXX: add support for the rest of enum nl80211_reg_rule_flags, we may 831fb1fc7adSLuis R. Rodriguez * want to just have the channel structure use these 832fb1fc7adSLuis R. Rodriguez */ 833b2e1b302SLuis R. Rodriguez static u32 map_regdom_flags(u32 rd_flags) 834b2e1b302SLuis R. Rodriguez { 835b2e1b302SLuis R. Rodriguez u32 channel_flags = 0; 836b2e1b302SLuis R. Rodriguez if (rd_flags & NL80211_RRF_PASSIVE_SCAN) 837b2e1b302SLuis R. Rodriguez channel_flags |= IEEE80211_CHAN_PASSIVE_SCAN; 838b2e1b302SLuis R. Rodriguez if (rd_flags & NL80211_RRF_NO_IBSS) 839b2e1b302SLuis R. Rodriguez channel_flags |= IEEE80211_CHAN_NO_IBSS; 840b2e1b302SLuis R. Rodriguez if (rd_flags & NL80211_RRF_DFS) 841b2e1b302SLuis R. Rodriguez channel_flags |= IEEE80211_CHAN_RADAR; 842b2e1b302SLuis R. Rodriguez return channel_flags; 843b2e1b302SLuis R. Rodriguez } 844b2e1b302SLuis R. Rodriguez 8451fa25e41SLuis R. Rodriguez static int freq_reg_info_regd(struct wiphy *wiphy, 8461fa25e41SLuis R. Rodriguez u32 center_freq, 847038659e7SLuis R. Rodriguez u32 desired_bw_khz, 8481fa25e41SLuis R. Rodriguez const struct ieee80211_reg_rule **reg_rule, 8491fa25e41SLuis R. Rodriguez const struct ieee80211_regdomain *custom_regd) 8508318d78aSJohannes Berg { 8518318d78aSJohannes Berg int i; 8520c7dc45dSLuis R. Rodriguez bool band_rule_found = false; 8533e0c3ff3SLuis R. Rodriguez const struct ieee80211_regdomain *regd; 854038659e7SLuis R. Rodriguez bool bw_fits = false; 855038659e7SLuis R. Rodriguez 856038659e7SLuis R. Rodriguez if (!desired_bw_khz) 857038659e7SLuis R. Rodriguez desired_bw_khz = MHZ_TO_KHZ(20); 8588318d78aSJohannes Berg 8591fa25e41SLuis R. Rodriguez regd = custom_regd ? custom_regd : cfg80211_regdomain; 8603e0c3ff3SLuis R. Rodriguez 861fb1fc7adSLuis R. Rodriguez /* 862fb1fc7adSLuis R. Rodriguez * Follow the driver's regulatory domain, if present, unless a country 863fb1fc7adSLuis R. Rodriguez * IE has been processed or a user wants to help complaince further 864fb1fc7adSLuis R. Rodriguez */ 8657db90f4aSLuis R. Rodriguez if (last_request->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && 8667db90f4aSLuis R. Rodriguez last_request->initiator != NL80211_REGDOM_SET_BY_USER && 8673e0c3ff3SLuis R. Rodriguez wiphy->regd) 8683e0c3ff3SLuis R. Rodriguez regd = wiphy->regd; 8693e0c3ff3SLuis R. Rodriguez 8703e0c3ff3SLuis R. Rodriguez if (!regd) 871b2e1b302SLuis R. Rodriguez return -EINVAL; 872b2e1b302SLuis R. Rodriguez 8733e0c3ff3SLuis R. Rodriguez for (i = 0; i < regd->n_reg_rules; i++) { 874b2e1b302SLuis R. Rodriguez const struct ieee80211_reg_rule *rr; 875b2e1b302SLuis R. Rodriguez const struct ieee80211_freq_range *fr = NULL; 876b2e1b302SLuis R. Rodriguez const struct ieee80211_power_rule *pr = NULL; 877b2e1b302SLuis R. Rodriguez 8783e0c3ff3SLuis R. Rodriguez rr = ®d->reg_rules[i]; 879b2e1b302SLuis R. Rodriguez fr = &rr->freq_range; 880b2e1b302SLuis R. Rodriguez pr = &rr->power_rule; 8810c7dc45dSLuis R. Rodriguez 882fb1fc7adSLuis R. Rodriguez /* 883fb1fc7adSLuis R. Rodriguez * We only need to know if one frequency rule was 8840c7dc45dSLuis R. Rodriguez * was in center_freq's band, that's enough, so lets 885fb1fc7adSLuis R. Rodriguez * not overwrite it once found 886fb1fc7adSLuis R. Rodriguez */ 8870c7dc45dSLuis R. Rodriguez if (!band_rule_found) 8880c7dc45dSLuis R. Rodriguez band_rule_found = freq_in_rule_band(fr, center_freq); 8890c7dc45dSLuis R. Rodriguez 890038659e7SLuis R. Rodriguez bw_fits = reg_does_bw_fit(fr, 891038659e7SLuis R. Rodriguez center_freq, 892038659e7SLuis R. Rodriguez desired_bw_khz); 8930c7dc45dSLuis R. Rodriguez 894038659e7SLuis R. Rodriguez if (band_rule_found && bw_fits) { 895b2e1b302SLuis R. Rodriguez *reg_rule = rr; 896038659e7SLuis R. Rodriguez return 0; 8978318d78aSJohannes Berg } 8988318d78aSJohannes Berg } 8998318d78aSJohannes Berg 9000c7dc45dSLuis R. Rodriguez if (!band_rule_found) 9010c7dc45dSLuis R. Rodriguez return -ERANGE; 9020c7dc45dSLuis R. Rodriguez 903038659e7SLuis R. Rodriguez return -EINVAL; 904b2e1b302SLuis R. Rodriguez } 90534f57347SLuis R. Rodriguez EXPORT_SYMBOL(freq_reg_info); 906b2e1b302SLuis R. Rodriguez 907038659e7SLuis R. Rodriguez int freq_reg_info(struct wiphy *wiphy, 908038659e7SLuis R. Rodriguez u32 center_freq, 909038659e7SLuis R. Rodriguez u32 desired_bw_khz, 9101fa25e41SLuis R. Rodriguez const struct ieee80211_reg_rule **reg_rule) 9111fa25e41SLuis R. Rodriguez { 912ac46d48eSLuis R. Rodriguez assert_cfg80211_lock(); 913038659e7SLuis R. Rodriguez return freq_reg_info_regd(wiphy, 914038659e7SLuis R. Rodriguez center_freq, 915038659e7SLuis R. Rodriguez desired_bw_khz, 916038659e7SLuis R. Rodriguez reg_rule, 917038659e7SLuis R. Rodriguez NULL); 9181fa25e41SLuis R. Rodriguez } 919b2e1b302SLuis R. Rodriguez 920038659e7SLuis R. Rodriguez /* 921038659e7SLuis R. Rodriguez * Note that right now we assume the desired channel bandwidth 922038659e7SLuis R. Rodriguez * is always 20 MHz for each individual channel (HT40 uses 20 MHz 923038659e7SLuis R. Rodriguez * per channel, the primary and the extension channel). To support 924038659e7SLuis R. Rodriguez * smaller custom bandwidths such as 5 MHz or 10 MHz we'll need a 925038659e7SLuis R. Rodriguez * new ieee80211_channel.target_bw and re run the regulatory check 926038659e7SLuis R. Rodriguez * on the wiphy with the target_bw specified. Then we can simply use 927038659e7SLuis R. Rodriguez * that below for the desired_bw_khz below. 928038659e7SLuis R. Rodriguez */ 929a92a3ce7SLuis R. Rodriguez static void handle_channel(struct wiphy *wiphy, enum ieee80211_band band, 930a92a3ce7SLuis R. Rodriguez unsigned int chan_idx) 931b2e1b302SLuis R. Rodriguez { 932b2e1b302SLuis R. Rodriguez int r; 933038659e7SLuis R. Rodriguez u32 flags, bw_flags = 0; 934038659e7SLuis R. Rodriguez u32 desired_bw_khz = MHZ_TO_KHZ(20); 935b2e1b302SLuis R. Rodriguez const struct ieee80211_reg_rule *reg_rule = NULL; 936b2e1b302SLuis R. Rodriguez const struct ieee80211_power_rule *power_rule = NULL; 937038659e7SLuis R. Rodriguez const struct ieee80211_freq_range *freq_range = NULL; 938a92a3ce7SLuis R. Rodriguez struct ieee80211_supported_band *sband; 939a92a3ce7SLuis R. Rodriguez struct ieee80211_channel *chan; 940fe33eb39SLuis R. Rodriguez struct wiphy *request_wiphy = NULL; 941a92a3ce7SLuis R. Rodriguez 942761cf7ecSLuis R. Rodriguez assert_cfg80211_lock(); 943761cf7ecSLuis R. Rodriguez 944806a9e39SLuis R. Rodriguez request_wiphy = wiphy_idx_to_wiphy(last_request->wiphy_idx); 945806a9e39SLuis R. Rodriguez 946a92a3ce7SLuis R. Rodriguez sband = wiphy->bands[band]; 947a92a3ce7SLuis R. Rodriguez BUG_ON(chan_idx >= sband->n_channels); 948a92a3ce7SLuis R. Rodriguez chan = &sband->channels[chan_idx]; 949a92a3ce7SLuis R. Rodriguez 950a92a3ce7SLuis R. Rodriguez flags = chan->orig_flags; 951b2e1b302SLuis R. Rodriguez 952038659e7SLuis R. Rodriguez r = freq_reg_info(wiphy, 953038659e7SLuis R. Rodriguez MHZ_TO_KHZ(chan->center_freq), 954038659e7SLuis R. Rodriguez desired_bw_khz, 955038659e7SLuis R. Rodriguez ®_rule); 956b2e1b302SLuis R. Rodriguez 957b2e1b302SLuis R. Rodriguez if (r) { 958fb1fc7adSLuis R. Rodriguez /* 959fb1fc7adSLuis R. Rodriguez * This means no regulatory rule was found in the country IE 9600c7dc45dSLuis R. Rodriguez * with a frequency range on the center_freq's band, since 9610c7dc45dSLuis R. Rodriguez * IEEE-802.11 allows for a country IE to have a subset of the 9620c7dc45dSLuis R. Rodriguez * regulatory information provided in a country we ignore 9630c7dc45dSLuis R. Rodriguez * disabling the channel unless at least one reg rule was 9640c7dc45dSLuis R. Rodriguez * found on the center_freq's band. For details see this 9650c7dc45dSLuis R. Rodriguez * clarification: 9660c7dc45dSLuis R. Rodriguez * 9670c7dc45dSLuis R. Rodriguez * http://tinyurl.com/11d-clarification 9680c7dc45dSLuis R. Rodriguez */ 9690c7dc45dSLuis R. Rodriguez if (r == -ERANGE && 9707db90f4aSLuis R. Rodriguez last_request->initiator == 9717db90f4aSLuis R. Rodriguez NL80211_REGDOM_SET_BY_COUNTRY_IE) { 9720c7dc45dSLuis R. Rodriguez #ifdef CONFIG_CFG80211_REG_DEBUG 9730c7dc45dSLuis R. Rodriguez printk(KERN_DEBUG "cfg80211: Leaving channel %d MHz " 9740c7dc45dSLuis R. Rodriguez "intact on %s - no rule found in band on " 9750c7dc45dSLuis R. Rodriguez "Country IE\n", 9760c7dc45dSLuis R. Rodriguez chan->center_freq, wiphy_name(wiphy)); 9770c7dc45dSLuis R. Rodriguez #endif 9780c7dc45dSLuis R. Rodriguez } else { 979fb1fc7adSLuis R. Rodriguez /* 980fb1fc7adSLuis R. Rodriguez * In this case we know the country IE has at least one reg rule 981fb1fc7adSLuis R. Rodriguez * for the band so we respect its band definitions 982fb1fc7adSLuis R. Rodriguez */ 9830c7dc45dSLuis R. Rodriguez #ifdef CONFIG_CFG80211_REG_DEBUG 9847db90f4aSLuis R. Rodriguez if (last_request->initiator == 9857db90f4aSLuis R. Rodriguez NL80211_REGDOM_SET_BY_COUNTRY_IE) 9860c7dc45dSLuis R. Rodriguez printk(KERN_DEBUG "cfg80211: Disabling " 9870c7dc45dSLuis R. Rodriguez "channel %d MHz on %s due to " 9880c7dc45dSLuis R. Rodriguez "Country IE\n", 9890c7dc45dSLuis R. Rodriguez chan->center_freq, wiphy_name(wiphy)); 9900c7dc45dSLuis R. Rodriguez #endif 9918318d78aSJohannes Berg flags |= IEEE80211_CHAN_DISABLED; 9928318d78aSJohannes Berg chan->flags = flags; 9930c7dc45dSLuis R. Rodriguez } 9948318d78aSJohannes Berg return; 9958318d78aSJohannes Berg } 9968318d78aSJohannes Berg 997b2e1b302SLuis R. Rodriguez power_rule = ®_rule->power_rule; 998038659e7SLuis R. Rodriguez freq_range = ®_rule->freq_range; 999038659e7SLuis R. Rodriguez 1000038659e7SLuis R. Rodriguez if (freq_range->max_bandwidth_khz < MHZ_TO_KHZ(40)) 1001038659e7SLuis R. Rodriguez bw_flags = IEEE80211_CHAN_NO_HT40; 1002b2e1b302SLuis R. Rodriguez 10037db90f4aSLuis R. Rodriguez if (last_request->initiator == NL80211_REGDOM_SET_BY_DRIVER && 1004806a9e39SLuis R. Rodriguez request_wiphy && request_wiphy == wiphy && 1005806a9e39SLuis R. Rodriguez request_wiphy->strict_regulatory) { 1006fb1fc7adSLuis R. Rodriguez /* 1007fb1fc7adSLuis R. Rodriguez * This gaurantees the driver's requested regulatory domain 1008f976376dSLuis R. Rodriguez * will always be used as a base for further regulatory 1009fb1fc7adSLuis R. Rodriguez * settings 1010fb1fc7adSLuis R. Rodriguez */ 1011f976376dSLuis R. Rodriguez chan->flags = chan->orig_flags = 1012038659e7SLuis R. Rodriguez map_regdom_flags(reg_rule->flags) | bw_flags; 1013f976376dSLuis R. Rodriguez chan->max_antenna_gain = chan->orig_mag = 1014f976376dSLuis R. Rodriguez (int) MBI_TO_DBI(power_rule->max_antenna_gain); 1015038659e7SLuis R. Rodriguez chan->max_bandwidth = KHZ_TO_MHZ(desired_bw_khz); 1016f976376dSLuis R. Rodriguez chan->max_power = chan->orig_mpwr = 1017f976376dSLuis R. Rodriguez (int) MBM_TO_DBM(power_rule->max_eirp); 1018f976376dSLuis R. Rodriguez return; 1019f976376dSLuis R. Rodriguez } 1020f976376dSLuis R. Rodriguez 1021038659e7SLuis R. Rodriguez chan->flags = flags | bw_flags | map_regdom_flags(reg_rule->flags); 10228318d78aSJohannes Berg chan->max_antenna_gain = min(chan->orig_mag, 1023b2e1b302SLuis R. Rodriguez (int) MBI_TO_DBI(power_rule->max_antenna_gain)); 1024038659e7SLuis R. Rodriguez chan->max_bandwidth = KHZ_TO_MHZ(desired_bw_khz); 1025253898c4SJohn W. Linville if (chan->orig_mpwr) 1026b2e1b302SLuis R. Rodriguez chan->max_power = min(chan->orig_mpwr, 1027b2e1b302SLuis R. Rodriguez (int) MBM_TO_DBM(power_rule->max_eirp)); 1028253898c4SJohn W. Linville else 1029b2e1b302SLuis R. Rodriguez chan->max_power = (int) MBM_TO_DBM(power_rule->max_eirp); 10308318d78aSJohannes Berg } 10318318d78aSJohannes Berg 1032a92a3ce7SLuis R. Rodriguez static void handle_band(struct wiphy *wiphy, enum ieee80211_band band) 10338318d78aSJohannes Berg { 1034a92a3ce7SLuis R. Rodriguez unsigned int i; 1035a92a3ce7SLuis R. Rodriguez struct ieee80211_supported_band *sband; 1036a92a3ce7SLuis R. Rodriguez 1037a92a3ce7SLuis R. Rodriguez BUG_ON(!wiphy->bands[band]); 1038a92a3ce7SLuis R. Rodriguez sband = wiphy->bands[band]; 10398318d78aSJohannes Berg 10408318d78aSJohannes Berg for (i = 0; i < sband->n_channels; i++) 1041a92a3ce7SLuis R. Rodriguez handle_channel(wiphy, band, i); 10428318d78aSJohannes Berg } 10438318d78aSJohannes Berg 10447db90f4aSLuis R. Rodriguez static bool ignore_reg_update(struct wiphy *wiphy, 10457db90f4aSLuis R. Rodriguez enum nl80211_reg_initiator initiator) 104614b9815aSLuis R. Rodriguez { 104714b9815aSLuis R. Rodriguez if (!last_request) 104814b9815aSLuis R. Rodriguez return true; 10497db90f4aSLuis R. Rodriguez if (initiator == NL80211_REGDOM_SET_BY_CORE && 10502a44f911SLuis R. Rodriguez wiphy->custom_regulatory) 105114b9815aSLuis R. Rodriguez return true; 1052fb1fc7adSLuis R. Rodriguez /* 1053fb1fc7adSLuis R. Rodriguez * wiphy->regd will be set once the device has its own 1054fb1fc7adSLuis R. Rodriguez * desired regulatory domain set 1055fb1fc7adSLuis R. Rodriguez */ 1056f976376dSLuis R. Rodriguez if (wiphy->strict_regulatory && !wiphy->regd && 1057f976376dSLuis R. Rodriguez !is_world_regdom(last_request->alpha2)) 105814b9815aSLuis R. Rodriguez return true; 105914b9815aSLuis R. Rodriguez return false; 106014b9815aSLuis R. Rodriguez } 106114b9815aSLuis R. Rodriguez 10627db90f4aSLuis R. Rodriguez static void update_all_wiphy_regulatory(enum nl80211_reg_initiator initiator) 1063b2e1b302SLuis R. Rodriguez { 1064b2e1b302SLuis R. Rodriguez struct cfg80211_registered_device *drv; 1065b2e1b302SLuis R. Rodriguez 1066b2e1b302SLuis R. Rodriguez list_for_each_entry(drv, &cfg80211_drv_list, list) 10677db90f4aSLuis R. Rodriguez wiphy_update_regulatory(&drv->wiphy, initiator); 1068b2e1b302SLuis R. Rodriguez } 1069b2e1b302SLuis R. Rodriguez 1070e38f8a7aSLuis R. Rodriguez static void handle_reg_beacon(struct wiphy *wiphy, 1071e38f8a7aSLuis R. Rodriguez unsigned int chan_idx, 1072e38f8a7aSLuis R. Rodriguez struct reg_beacon *reg_beacon) 1073e38f8a7aSLuis R. Rodriguez { 1074e38f8a7aSLuis R. Rodriguez struct ieee80211_supported_band *sband; 1075e38f8a7aSLuis R. Rodriguez struct ieee80211_channel *chan; 10766bad8766SLuis R. Rodriguez bool channel_changed = false; 10776bad8766SLuis R. Rodriguez struct ieee80211_channel chan_before; 1078e38f8a7aSLuis R. Rodriguez 1079e38f8a7aSLuis R. Rodriguez assert_cfg80211_lock(); 1080e38f8a7aSLuis R. Rodriguez 1081e38f8a7aSLuis R. Rodriguez sband = wiphy->bands[reg_beacon->chan.band]; 1082e38f8a7aSLuis R. Rodriguez chan = &sband->channels[chan_idx]; 1083e38f8a7aSLuis R. Rodriguez 1084e38f8a7aSLuis R. Rodriguez if (likely(chan->center_freq != reg_beacon->chan.center_freq)) 1085e38f8a7aSLuis R. Rodriguez return; 1086e38f8a7aSLuis R. Rodriguez 10876bad8766SLuis R. Rodriguez if (chan->beacon_found) 10886bad8766SLuis R. Rodriguez return; 10896bad8766SLuis R. Rodriguez 10906bad8766SLuis R. Rodriguez chan->beacon_found = true; 10916bad8766SLuis R. Rodriguez 10926bad8766SLuis R. Rodriguez chan_before.center_freq = chan->center_freq; 10936bad8766SLuis R. Rodriguez chan_before.flags = chan->flags; 10946bad8766SLuis R. Rodriguez 1095a4ed90d6SLuis R. Rodriguez if ((chan->flags & IEEE80211_CHAN_PASSIVE_SCAN) && 1096a4ed90d6SLuis R. Rodriguez !(chan->orig_flags & IEEE80211_CHAN_PASSIVE_SCAN)) { 1097e38f8a7aSLuis R. Rodriguez chan->flags &= ~IEEE80211_CHAN_PASSIVE_SCAN; 10986bad8766SLuis R. Rodriguez channel_changed = true; 1099e38f8a7aSLuis R. Rodriguez } 1100e38f8a7aSLuis R. Rodriguez 1101a4ed90d6SLuis R. Rodriguez if ((chan->flags & IEEE80211_CHAN_NO_IBSS) && 1102a4ed90d6SLuis R. Rodriguez !(chan->orig_flags & IEEE80211_CHAN_NO_IBSS)) { 1103e38f8a7aSLuis R. Rodriguez chan->flags &= ~IEEE80211_CHAN_NO_IBSS; 11046bad8766SLuis R. Rodriguez channel_changed = true; 1105e38f8a7aSLuis R. Rodriguez } 1106e38f8a7aSLuis R. Rodriguez 11076bad8766SLuis R. Rodriguez if (channel_changed) 11086bad8766SLuis R. Rodriguez nl80211_send_beacon_hint_event(wiphy, &chan_before, chan); 1109e38f8a7aSLuis R. Rodriguez } 1110e38f8a7aSLuis R. Rodriguez 1111e38f8a7aSLuis R. Rodriguez /* 1112e38f8a7aSLuis R. Rodriguez * Called when a scan on a wiphy finds a beacon on 1113e38f8a7aSLuis R. Rodriguez * new channel 1114e38f8a7aSLuis R. Rodriguez */ 1115e38f8a7aSLuis R. Rodriguez static void wiphy_update_new_beacon(struct wiphy *wiphy, 1116e38f8a7aSLuis R. Rodriguez struct reg_beacon *reg_beacon) 1117e38f8a7aSLuis R. Rodriguez { 1118e38f8a7aSLuis R. Rodriguez unsigned int i; 1119e38f8a7aSLuis R. Rodriguez struct ieee80211_supported_band *sband; 1120e38f8a7aSLuis R. Rodriguez 1121e38f8a7aSLuis R. Rodriguez assert_cfg80211_lock(); 1122e38f8a7aSLuis R. Rodriguez 1123e38f8a7aSLuis R. Rodriguez if (!wiphy->bands[reg_beacon->chan.band]) 1124e38f8a7aSLuis R. Rodriguez return; 1125e38f8a7aSLuis R. Rodriguez 1126e38f8a7aSLuis R. Rodriguez sband = wiphy->bands[reg_beacon->chan.band]; 1127e38f8a7aSLuis R. Rodriguez 1128e38f8a7aSLuis R. Rodriguez for (i = 0; i < sband->n_channels; i++) 1129e38f8a7aSLuis R. Rodriguez handle_reg_beacon(wiphy, i, reg_beacon); 1130e38f8a7aSLuis R. Rodriguez } 1131e38f8a7aSLuis R. Rodriguez 1132e38f8a7aSLuis R. Rodriguez /* 1133e38f8a7aSLuis R. Rodriguez * Called upon reg changes or a new wiphy is added 1134e38f8a7aSLuis R. Rodriguez */ 1135e38f8a7aSLuis R. Rodriguez static void wiphy_update_beacon_reg(struct wiphy *wiphy) 1136e38f8a7aSLuis R. Rodriguez { 1137e38f8a7aSLuis R. Rodriguez unsigned int i; 1138e38f8a7aSLuis R. Rodriguez struct ieee80211_supported_band *sband; 1139e38f8a7aSLuis R. Rodriguez struct reg_beacon *reg_beacon; 1140e38f8a7aSLuis R. Rodriguez 1141e38f8a7aSLuis R. Rodriguez assert_cfg80211_lock(); 1142e38f8a7aSLuis R. Rodriguez 1143e38f8a7aSLuis R. Rodriguez if (list_empty(®_beacon_list)) 1144e38f8a7aSLuis R. Rodriguez return; 1145e38f8a7aSLuis R. Rodriguez 1146e38f8a7aSLuis R. Rodriguez list_for_each_entry(reg_beacon, ®_beacon_list, list) { 1147e38f8a7aSLuis R. Rodriguez if (!wiphy->bands[reg_beacon->chan.band]) 1148e38f8a7aSLuis R. Rodriguez continue; 1149e38f8a7aSLuis R. Rodriguez sband = wiphy->bands[reg_beacon->chan.band]; 1150e38f8a7aSLuis R. Rodriguez for (i = 0; i < sband->n_channels; i++) 1151e38f8a7aSLuis R. Rodriguez handle_reg_beacon(wiphy, i, reg_beacon); 1152e38f8a7aSLuis R. Rodriguez } 1153e38f8a7aSLuis R. Rodriguez } 1154e38f8a7aSLuis R. Rodriguez 1155e38f8a7aSLuis R. Rodriguez static bool reg_is_world_roaming(struct wiphy *wiphy) 1156e38f8a7aSLuis R. Rodriguez { 1157e38f8a7aSLuis R. Rodriguez if (is_world_regdom(cfg80211_regdomain->alpha2) || 1158e38f8a7aSLuis R. Rodriguez (wiphy->regd && is_world_regdom(wiphy->regd->alpha2))) 1159e38f8a7aSLuis R. Rodriguez return true; 1160b1ed8dddSLuis R. Rodriguez if (last_request && 1161b1ed8dddSLuis R. Rodriguez last_request->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && 1162e38f8a7aSLuis R. Rodriguez wiphy->custom_regulatory) 1163e38f8a7aSLuis R. Rodriguez return true; 1164e38f8a7aSLuis R. Rodriguez return false; 1165e38f8a7aSLuis R. Rodriguez } 1166e38f8a7aSLuis R. Rodriguez 1167e38f8a7aSLuis R. Rodriguez /* Reap the advantages of previously found beacons */ 1168e38f8a7aSLuis R. Rodriguez static void reg_process_beacons(struct wiphy *wiphy) 1169e38f8a7aSLuis R. Rodriguez { 1170b1ed8dddSLuis R. Rodriguez /* 1171b1ed8dddSLuis R. Rodriguez * Means we are just firing up cfg80211, so no beacons would 1172b1ed8dddSLuis R. Rodriguez * have been processed yet. 1173b1ed8dddSLuis R. Rodriguez */ 1174b1ed8dddSLuis R. Rodriguez if (!last_request) 1175b1ed8dddSLuis R. Rodriguez return; 1176e38f8a7aSLuis R. Rodriguez if (!reg_is_world_roaming(wiphy)) 1177e38f8a7aSLuis R. Rodriguez return; 1178e38f8a7aSLuis R. Rodriguez wiphy_update_beacon_reg(wiphy); 1179e38f8a7aSLuis R. Rodriguez } 1180e38f8a7aSLuis R. Rodriguez 1181038659e7SLuis R. Rodriguez static bool is_ht40_not_allowed(struct ieee80211_channel *chan) 1182038659e7SLuis R. Rodriguez { 1183038659e7SLuis R. Rodriguez if (!chan) 1184038659e7SLuis R. Rodriguez return true; 1185038659e7SLuis R. Rodriguez if (chan->flags & IEEE80211_CHAN_DISABLED) 1186038659e7SLuis R. Rodriguez return true; 1187038659e7SLuis R. Rodriguez /* This would happen when regulatory rules disallow HT40 completely */ 1188038659e7SLuis R. Rodriguez if (IEEE80211_CHAN_NO_HT40 == (chan->flags & (IEEE80211_CHAN_NO_HT40))) 1189038659e7SLuis R. Rodriguez return true; 1190038659e7SLuis R. Rodriguez return false; 1191038659e7SLuis R. Rodriguez } 1192038659e7SLuis R. Rodriguez 1193038659e7SLuis R. Rodriguez static void reg_process_ht_flags_channel(struct wiphy *wiphy, 1194038659e7SLuis R. Rodriguez enum ieee80211_band band, 1195038659e7SLuis R. Rodriguez unsigned int chan_idx) 1196038659e7SLuis R. Rodriguez { 1197038659e7SLuis R. Rodriguez struct ieee80211_supported_band *sband; 1198038659e7SLuis R. Rodriguez struct ieee80211_channel *channel; 1199038659e7SLuis R. Rodriguez struct ieee80211_channel *channel_before = NULL, *channel_after = NULL; 1200038659e7SLuis R. Rodriguez unsigned int i; 1201038659e7SLuis R. Rodriguez 1202038659e7SLuis R. Rodriguez assert_cfg80211_lock(); 1203038659e7SLuis R. Rodriguez 1204038659e7SLuis R. Rodriguez sband = wiphy->bands[band]; 1205038659e7SLuis R. Rodriguez BUG_ON(chan_idx >= sband->n_channels); 1206038659e7SLuis R. Rodriguez channel = &sband->channels[chan_idx]; 1207038659e7SLuis R. Rodriguez 1208038659e7SLuis R. Rodriguez if (is_ht40_not_allowed(channel)) { 1209038659e7SLuis R. Rodriguez channel->flags |= IEEE80211_CHAN_NO_HT40; 1210038659e7SLuis R. Rodriguez return; 1211038659e7SLuis R. Rodriguez } 1212038659e7SLuis R. Rodriguez 1213038659e7SLuis R. Rodriguez /* 1214038659e7SLuis R. Rodriguez * We need to ensure the extension channels exist to 1215038659e7SLuis R. Rodriguez * be able to use HT40- or HT40+, this finds them (or not) 1216038659e7SLuis R. Rodriguez */ 1217038659e7SLuis R. Rodriguez for (i = 0; i < sband->n_channels; i++) { 1218038659e7SLuis R. Rodriguez struct ieee80211_channel *c = &sband->channels[i]; 1219038659e7SLuis R. Rodriguez if (c->center_freq == (channel->center_freq - 20)) 1220038659e7SLuis R. Rodriguez channel_before = c; 1221038659e7SLuis R. Rodriguez if (c->center_freq == (channel->center_freq + 20)) 1222038659e7SLuis R. Rodriguez channel_after = c; 1223038659e7SLuis R. Rodriguez } 1224038659e7SLuis R. Rodriguez 1225038659e7SLuis R. Rodriguez /* 1226038659e7SLuis R. Rodriguez * Please note that this assumes target bandwidth is 20 MHz, 1227038659e7SLuis R. Rodriguez * if that ever changes we also need to change the below logic 1228038659e7SLuis R. Rodriguez * to include that as well. 1229038659e7SLuis R. Rodriguez */ 1230038659e7SLuis R. Rodriguez if (is_ht40_not_allowed(channel_before)) 1231689da1b3SLuis R. Rodriguez channel->flags |= IEEE80211_CHAN_NO_HT40MINUS; 1232038659e7SLuis R. Rodriguez else 1233689da1b3SLuis R. Rodriguez channel->flags &= ~IEEE80211_CHAN_NO_HT40MINUS; 1234038659e7SLuis R. Rodriguez 1235038659e7SLuis R. Rodriguez if (is_ht40_not_allowed(channel_after)) 1236689da1b3SLuis R. Rodriguez channel->flags |= IEEE80211_CHAN_NO_HT40PLUS; 1237038659e7SLuis R. Rodriguez else 1238689da1b3SLuis R. Rodriguez channel->flags &= ~IEEE80211_CHAN_NO_HT40PLUS; 1239038659e7SLuis R. Rodriguez } 1240038659e7SLuis R. Rodriguez 1241038659e7SLuis R. Rodriguez static void reg_process_ht_flags_band(struct wiphy *wiphy, 1242038659e7SLuis R. Rodriguez enum ieee80211_band band) 1243038659e7SLuis R. Rodriguez { 1244038659e7SLuis R. Rodriguez unsigned int i; 1245038659e7SLuis R. Rodriguez struct ieee80211_supported_band *sband; 1246038659e7SLuis R. Rodriguez 1247038659e7SLuis R. Rodriguez BUG_ON(!wiphy->bands[band]); 1248038659e7SLuis R. Rodriguez sband = wiphy->bands[band]; 1249038659e7SLuis R. Rodriguez 1250038659e7SLuis R. Rodriguez for (i = 0; i < sband->n_channels; i++) 1251038659e7SLuis R. Rodriguez reg_process_ht_flags_channel(wiphy, band, i); 1252038659e7SLuis R. Rodriguez } 1253038659e7SLuis R. Rodriguez 1254038659e7SLuis R. Rodriguez static void reg_process_ht_flags(struct wiphy *wiphy) 1255038659e7SLuis R. Rodriguez { 1256038659e7SLuis R. Rodriguez enum ieee80211_band band; 1257038659e7SLuis R. Rodriguez 1258038659e7SLuis R. Rodriguez if (!wiphy) 1259038659e7SLuis R. Rodriguez return; 1260038659e7SLuis R. Rodriguez 1261038659e7SLuis R. Rodriguez for (band = 0; band < IEEE80211_NUM_BANDS; band++) { 1262038659e7SLuis R. Rodriguez if (wiphy->bands[band]) 1263038659e7SLuis R. Rodriguez reg_process_ht_flags_band(wiphy, band); 1264038659e7SLuis R. Rodriguez } 1265038659e7SLuis R. Rodriguez 1266038659e7SLuis R. Rodriguez } 1267038659e7SLuis R. Rodriguez 12687db90f4aSLuis R. Rodriguez void wiphy_update_regulatory(struct wiphy *wiphy, 12697db90f4aSLuis R. Rodriguez enum nl80211_reg_initiator initiator) 12708318d78aSJohannes Berg { 12718318d78aSJohannes Berg enum ieee80211_band band; 1272d46e5b1dSLuis R. Rodriguez 12737db90f4aSLuis R. Rodriguez if (ignore_reg_update(wiphy, initiator)) 1274e38f8a7aSLuis R. Rodriguez goto out; 1275b2e1b302SLuis R. Rodriguez for (band = 0; band < IEEE80211_NUM_BANDS; band++) { 12768318d78aSJohannes Berg if (wiphy->bands[band]) 1277a92a3ce7SLuis R. Rodriguez handle_band(wiphy, band); 1278b2e1b302SLuis R. Rodriguez } 1279e38f8a7aSLuis R. Rodriguez out: 1280e38f8a7aSLuis R. Rodriguez reg_process_beacons(wiphy); 1281038659e7SLuis R. Rodriguez reg_process_ht_flags(wiphy); 1282b2e1b302SLuis R. Rodriguez if (wiphy->reg_notifier) 1283716f9392SLuis R. Rodriguez wiphy->reg_notifier(wiphy, last_request); 1284b2e1b302SLuis R. Rodriguez } 1285b2e1b302SLuis R. Rodriguez 12861fa25e41SLuis R. Rodriguez static void handle_channel_custom(struct wiphy *wiphy, 12871fa25e41SLuis R. Rodriguez enum ieee80211_band band, 12881fa25e41SLuis R. Rodriguez unsigned int chan_idx, 12891fa25e41SLuis R. Rodriguez const struct ieee80211_regdomain *regd) 12901fa25e41SLuis R. Rodriguez { 12911fa25e41SLuis R. Rodriguez int r; 1292038659e7SLuis R. Rodriguez u32 desired_bw_khz = MHZ_TO_KHZ(20); 1293038659e7SLuis R. Rodriguez u32 bw_flags = 0; 12941fa25e41SLuis R. Rodriguez const struct ieee80211_reg_rule *reg_rule = NULL; 12951fa25e41SLuis R. Rodriguez const struct ieee80211_power_rule *power_rule = NULL; 1296038659e7SLuis R. Rodriguez const struct ieee80211_freq_range *freq_range = NULL; 12971fa25e41SLuis R. Rodriguez struct ieee80211_supported_band *sband; 12981fa25e41SLuis R. Rodriguez struct ieee80211_channel *chan; 12991fa25e41SLuis R. Rodriguez 1300ac46d48eSLuis R. Rodriguez assert_cfg80211_lock(); 1301ac46d48eSLuis R. Rodriguez 13021fa25e41SLuis R. Rodriguez sband = wiphy->bands[band]; 13031fa25e41SLuis R. Rodriguez BUG_ON(chan_idx >= sband->n_channels); 13041fa25e41SLuis R. Rodriguez chan = &sband->channels[chan_idx]; 13051fa25e41SLuis R. Rodriguez 1306038659e7SLuis R. Rodriguez r = freq_reg_info_regd(wiphy, 1307038659e7SLuis R. Rodriguez MHZ_TO_KHZ(chan->center_freq), 1308038659e7SLuis R. Rodriguez desired_bw_khz, 1309038659e7SLuis R. Rodriguez ®_rule, 1310038659e7SLuis R. Rodriguez regd); 13111fa25e41SLuis R. Rodriguez 13121fa25e41SLuis R. Rodriguez if (r) { 13131fa25e41SLuis R. Rodriguez chan->flags = IEEE80211_CHAN_DISABLED; 13141fa25e41SLuis R. Rodriguez return; 13151fa25e41SLuis R. Rodriguez } 13161fa25e41SLuis R. Rodriguez 13171fa25e41SLuis R. Rodriguez power_rule = ®_rule->power_rule; 1318038659e7SLuis R. Rodriguez freq_range = ®_rule->freq_range; 13191fa25e41SLuis R. Rodriguez 1320038659e7SLuis R. Rodriguez if (freq_range->max_bandwidth_khz < MHZ_TO_KHZ(40)) 1321038659e7SLuis R. Rodriguez bw_flags = IEEE80211_CHAN_NO_HT40; 1322038659e7SLuis R. Rodriguez 1323038659e7SLuis R. Rodriguez chan->flags |= map_regdom_flags(reg_rule->flags) | bw_flags; 13241fa25e41SLuis R. Rodriguez chan->max_antenna_gain = (int) MBI_TO_DBI(power_rule->max_antenna_gain); 1325038659e7SLuis R. Rodriguez chan->max_bandwidth = KHZ_TO_MHZ(desired_bw_khz); 13261fa25e41SLuis R. Rodriguez chan->max_power = (int) MBM_TO_DBM(power_rule->max_eirp); 13271fa25e41SLuis R. Rodriguez } 13281fa25e41SLuis R. Rodriguez 13291fa25e41SLuis R. Rodriguez static void handle_band_custom(struct wiphy *wiphy, enum ieee80211_band band, 13301fa25e41SLuis R. Rodriguez const struct ieee80211_regdomain *regd) 13311fa25e41SLuis R. Rodriguez { 13321fa25e41SLuis R. Rodriguez unsigned int i; 13331fa25e41SLuis R. Rodriguez struct ieee80211_supported_band *sband; 13341fa25e41SLuis R. Rodriguez 13351fa25e41SLuis R. Rodriguez BUG_ON(!wiphy->bands[band]); 13361fa25e41SLuis R. Rodriguez sband = wiphy->bands[band]; 13371fa25e41SLuis R. Rodriguez 13381fa25e41SLuis R. Rodriguez for (i = 0; i < sband->n_channels; i++) 13391fa25e41SLuis R. Rodriguez handle_channel_custom(wiphy, band, i, regd); 13401fa25e41SLuis R. Rodriguez } 13411fa25e41SLuis R. Rodriguez 13421fa25e41SLuis R. Rodriguez /* Used by drivers prior to wiphy registration */ 13431fa25e41SLuis R. Rodriguez void wiphy_apply_custom_regulatory(struct wiphy *wiphy, 13441fa25e41SLuis R. Rodriguez const struct ieee80211_regdomain *regd) 13451fa25e41SLuis R. Rodriguez { 13461fa25e41SLuis R. Rodriguez enum ieee80211_band band; 1347bbcf3f02SLuis R. Rodriguez unsigned int bands_set = 0; 1348ac46d48eSLuis R. Rodriguez 1349ac46d48eSLuis R. Rodriguez mutex_lock(&cfg80211_mutex); 13501fa25e41SLuis R. Rodriguez for (band = 0; band < IEEE80211_NUM_BANDS; band++) { 1351bbcf3f02SLuis R. Rodriguez if (!wiphy->bands[band]) 1352bbcf3f02SLuis R. Rodriguez continue; 13531fa25e41SLuis R. Rodriguez handle_band_custom(wiphy, band, regd); 1354bbcf3f02SLuis R. Rodriguez bands_set++; 13551fa25e41SLuis R. Rodriguez } 1356ac46d48eSLuis R. Rodriguez mutex_unlock(&cfg80211_mutex); 1357bbcf3f02SLuis R. Rodriguez 1358bbcf3f02SLuis R. Rodriguez /* 1359bbcf3f02SLuis R. Rodriguez * no point in calling this if it won't have any effect 1360bbcf3f02SLuis R. Rodriguez * on your device's supportd bands. 1361bbcf3f02SLuis R. Rodriguez */ 1362bbcf3f02SLuis R. Rodriguez WARN_ON(!bands_set); 13631fa25e41SLuis R. Rodriguez } 13641fa25e41SLuis R. Rodriguez EXPORT_SYMBOL(wiphy_apply_custom_regulatory); 13651fa25e41SLuis R. Rodriguez 13663e0c3ff3SLuis R. Rodriguez static int reg_copy_regd(const struct ieee80211_regdomain **dst_regd, 13673e0c3ff3SLuis R. Rodriguez const struct ieee80211_regdomain *src_regd) 13683e0c3ff3SLuis R. Rodriguez { 13693e0c3ff3SLuis R. Rodriguez struct ieee80211_regdomain *regd; 13703e0c3ff3SLuis R. Rodriguez int size_of_regd = 0; 13713e0c3ff3SLuis R. Rodriguez unsigned int i; 13723e0c3ff3SLuis R. Rodriguez 13733e0c3ff3SLuis R. Rodriguez size_of_regd = sizeof(struct ieee80211_regdomain) + 13743e0c3ff3SLuis R. Rodriguez ((src_regd->n_reg_rules + 1) * sizeof(struct ieee80211_reg_rule)); 13753e0c3ff3SLuis R. Rodriguez 13763e0c3ff3SLuis R. Rodriguez regd = kzalloc(size_of_regd, GFP_KERNEL); 13773e0c3ff3SLuis R. Rodriguez if (!regd) 13783e0c3ff3SLuis R. Rodriguez return -ENOMEM; 13793e0c3ff3SLuis R. Rodriguez 13803e0c3ff3SLuis R. Rodriguez memcpy(regd, src_regd, sizeof(struct ieee80211_regdomain)); 13813e0c3ff3SLuis R. Rodriguez 13823e0c3ff3SLuis R. Rodriguez for (i = 0; i < src_regd->n_reg_rules; i++) 13833e0c3ff3SLuis R. Rodriguez memcpy(®d->reg_rules[i], &src_regd->reg_rules[i], 13843e0c3ff3SLuis R. Rodriguez sizeof(struct ieee80211_reg_rule)); 13853e0c3ff3SLuis R. Rodriguez 13863e0c3ff3SLuis R. Rodriguez *dst_regd = regd; 13873e0c3ff3SLuis R. Rodriguez return 0; 1388b2e1b302SLuis R. Rodriguez } 1389b2e1b302SLuis R. Rodriguez 1390fb1fc7adSLuis R. Rodriguez /* 1391fb1fc7adSLuis R. Rodriguez * Return value which can be used by ignore_request() to indicate 1392fb1fc7adSLuis R. Rodriguez * it has been determined we should intersect two regulatory domains 1393fb1fc7adSLuis R. Rodriguez */ 13949c96477dSLuis R. Rodriguez #define REG_INTERSECT 1 13959c96477dSLuis R. Rodriguez 139684fa4f43SJohannes Berg /* This has the logic which determines when a new request 139784fa4f43SJohannes Berg * should be ignored. */ 13982f92cd2eSLuis R. Rodriguez static int ignore_request(struct wiphy *wiphy, 13992f92cd2eSLuis R. Rodriguez struct regulatory_request *pending_request) 140084fa4f43SJohannes Berg { 1401806a9e39SLuis R. Rodriguez struct wiphy *last_wiphy = NULL; 1402761cf7ecSLuis R. Rodriguez 1403761cf7ecSLuis R. Rodriguez assert_cfg80211_lock(); 1404761cf7ecSLuis R. Rodriguez 140584fa4f43SJohannes Berg /* All initial requests are respected */ 140684fa4f43SJohannes Berg if (!last_request) 140784fa4f43SJohannes Berg return 0; 140884fa4f43SJohannes Berg 14092f92cd2eSLuis R. Rodriguez switch (pending_request->initiator) { 14107db90f4aSLuis R. Rodriguez case NL80211_REGDOM_SET_BY_CORE: 1411ba25c141SLuis R. Rodriguez return -EINVAL; 14127db90f4aSLuis R. Rodriguez case NL80211_REGDOM_SET_BY_COUNTRY_IE: 1413806a9e39SLuis R. Rodriguez 1414806a9e39SLuis R. Rodriguez last_wiphy = wiphy_idx_to_wiphy(last_request->wiphy_idx); 1415806a9e39SLuis R. Rodriguez 14162f92cd2eSLuis R. Rodriguez if (unlikely(!is_an_alpha2(pending_request->alpha2))) 141784fa4f43SJohannes Berg return -EINVAL; 14187db90f4aSLuis R. Rodriguez if (last_request->initiator == 14197db90f4aSLuis R. Rodriguez NL80211_REGDOM_SET_BY_COUNTRY_IE) { 1420806a9e39SLuis R. Rodriguez if (last_wiphy != wiphy) { 142184fa4f43SJohannes Berg /* 142284fa4f43SJohannes Berg * Two cards with two APs claiming different 142384fa4f43SJohannes Berg * different Country IE alpha2s. We could 142484fa4f43SJohannes Berg * intersect them, but that seems unlikely 142584fa4f43SJohannes Berg * to be correct. Reject second one for now. 142684fa4f43SJohannes Berg */ 14272f92cd2eSLuis R. Rodriguez if (regdom_changes(pending_request->alpha2)) 142884fa4f43SJohannes Berg return -EOPNOTSUPP; 142984fa4f43SJohannes Berg return -EALREADY; 143084fa4f43SJohannes Berg } 1431fb1fc7adSLuis R. Rodriguez /* 1432fb1fc7adSLuis R. Rodriguez * Two consecutive Country IE hints on the same wiphy. 1433fb1fc7adSLuis R. Rodriguez * This should be picked up early by the driver/stack 1434fb1fc7adSLuis R. Rodriguez */ 14352f92cd2eSLuis R. Rodriguez if (WARN_ON(regdom_changes(pending_request->alpha2))) 143684fa4f43SJohannes Berg return 0; 143784fa4f43SJohannes Berg return -EALREADY; 143884fa4f43SJohannes Berg } 14393f2355cbSLuis R. Rodriguez return REG_INTERSECT; 14407db90f4aSLuis R. Rodriguez case NL80211_REGDOM_SET_BY_DRIVER: 14417db90f4aSLuis R. Rodriguez if (last_request->initiator == NL80211_REGDOM_SET_BY_CORE) { 1442e74b1e7fSLuis R. Rodriguez if (is_old_static_regdom(cfg80211_regdomain)) 144384fa4f43SJohannes Berg return 0; 14442f92cd2eSLuis R. Rodriguez if (regdom_changes(pending_request->alpha2)) 1445e74b1e7fSLuis R. Rodriguez return 0; 1446e74b1e7fSLuis R. Rodriguez return -EALREADY; 1447e74b1e7fSLuis R. Rodriguez } 1448fff32c04SLuis R. Rodriguez 1449fff32c04SLuis R. Rodriguez /* 1450fff32c04SLuis R. Rodriguez * This would happen if you unplug and plug your card 1451fff32c04SLuis R. Rodriguez * back in or if you add a new device for which the previously 1452fff32c04SLuis R. Rodriguez * loaded card also agrees on the regulatory domain. 1453fff32c04SLuis R. Rodriguez */ 14547db90f4aSLuis R. Rodriguez if (last_request->initiator == NL80211_REGDOM_SET_BY_DRIVER && 14552f92cd2eSLuis R. Rodriguez !regdom_changes(pending_request->alpha2)) 1456fff32c04SLuis R. Rodriguez return -EALREADY; 1457fff32c04SLuis R. Rodriguez 14583e0c3ff3SLuis R. Rodriguez return REG_INTERSECT; 14597db90f4aSLuis R. Rodriguez case NL80211_REGDOM_SET_BY_USER: 14607db90f4aSLuis R. Rodriguez if (last_request->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) 14619c96477dSLuis R. Rodriguez return REG_INTERSECT; 1462fb1fc7adSLuis R. Rodriguez /* 1463fb1fc7adSLuis R. Rodriguez * If the user knows better the user should set the regdom 1464fb1fc7adSLuis R. Rodriguez * to their country before the IE is picked up 1465fb1fc7adSLuis R. Rodriguez */ 14667db90f4aSLuis R. Rodriguez if (last_request->initiator == NL80211_REGDOM_SET_BY_USER && 14673f2355cbSLuis R. Rodriguez last_request->intersect) 14683f2355cbSLuis R. Rodriguez return -EOPNOTSUPP; 1469fb1fc7adSLuis R. Rodriguez /* 1470fb1fc7adSLuis R. Rodriguez * Process user requests only after previous user/driver/core 1471fb1fc7adSLuis R. Rodriguez * requests have been processed 1472fb1fc7adSLuis R. Rodriguez */ 14737db90f4aSLuis R. Rodriguez if (last_request->initiator == NL80211_REGDOM_SET_BY_CORE || 14747db90f4aSLuis R. Rodriguez last_request->initiator == NL80211_REGDOM_SET_BY_DRIVER || 14757db90f4aSLuis R. Rodriguez last_request->initiator == NL80211_REGDOM_SET_BY_USER) { 147669b1572bSLuis R. Rodriguez if (regdom_changes(last_request->alpha2)) 14775eebade6SLuis R. Rodriguez return -EAGAIN; 14785eebade6SLuis R. Rodriguez } 14795eebade6SLuis R. Rodriguez 1480e74b1e7fSLuis R. Rodriguez if (!is_old_static_regdom(cfg80211_regdomain) && 14812f92cd2eSLuis R. Rodriguez !regdom_changes(pending_request->alpha2)) 1482e74b1e7fSLuis R. Rodriguez return -EALREADY; 1483e74b1e7fSLuis R. Rodriguez 148484fa4f43SJohannes Berg return 0; 148584fa4f43SJohannes Berg } 148684fa4f43SJohannes Berg 148784fa4f43SJohannes Berg return -EINVAL; 148884fa4f43SJohannes Berg } 148984fa4f43SJohannes Berg 1490d1c96a9aSLuis R. Rodriguez /** 1491d1c96a9aSLuis R. Rodriguez * __regulatory_hint - hint to the wireless core a regulatory domain 1492d1c96a9aSLuis R. Rodriguez * @wiphy: if the hint comes from country information from an AP, this 1493d1c96a9aSLuis R. Rodriguez * is required to be set to the wiphy that received the information 149428da32d7SLuis R. Rodriguez * @pending_request: the regulatory request currently being processed 1495d1c96a9aSLuis R. Rodriguez * 1496d1c96a9aSLuis R. Rodriguez * The Wireless subsystem can use this function to hint to the wireless core 149728da32d7SLuis R. Rodriguez * what it believes should be the current regulatory domain. 1498d1c96a9aSLuis R. Rodriguez * 1499d1c96a9aSLuis R. Rodriguez * Returns zero if all went fine, %-EALREADY if a regulatory domain had 1500d1c96a9aSLuis R. Rodriguez * already been set or other standard error codes. 1501d1c96a9aSLuis R. Rodriguez * 1502d1c96a9aSLuis R. Rodriguez * Caller must hold &cfg80211_mutex 1503d1c96a9aSLuis R. Rodriguez */ 150428da32d7SLuis R. Rodriguez static int __regulatory_hint(struct wiphy *wiphy, 150528da32d7SLuis R. Rodriguez struct regulatory_request *pending_request) 1506b2e1b302SLuis R. Rodriguez { 15079c96477dSLuis R. Rodriguez bool intersect = false; 1508b2e1b302SLuis R. Rodriguez int r = 0; 1509b2e1b302SLuis R. Rodriguez 1510761cf7ecSLuis R. Rodriguez assert_cfg80211_lock(); 1511761cf7ecSLuis R. Rodriguez 15122f92cd2eSLuis R. Rodriguez r = ignore_request(wiphy, pending_request); 15139c96477dSLuis R. Rodriguez 15143e0c3ff3SLuis R. Rodriguez if (r == REG_INTERSECT) { 15157db90f4aSLuis R. Rodriguez if (pending_request->initiator == 15167db90f4aSLuis R. Rodriguez NL80211_REGDOM_SET_BY_DRIVER) { 15173e0c3ff3SLuis R. Rodriguez r = reg_copy_regd(&wiphy->regd, cfg80211_regdomain); 1518d951c1ddSLuis R. Rodriguez if (r) { 1519d951c1ddSLuis R. Rodriguez kfree(pending_request); 1520b2e1b302SLuis R. Rodriguez return r; 15213e0c3ff3SLuis R. Rodriguez } 1522d951c1ddSLuis R. Rodriguez } 15233e0c3ff3SLuis R. Rodriguez intersect = true; 15243e0c3ff3SLuis R. Rodriguez } else if (r) { 1525fb1fc7adSLuis R. Rodriguez /* 1526fb1fc7adSLuis R. Rodriguez * If the regulatory domain being requested by the 15273e0c3ff3SLuis R. Rodriguez * driver has already been set just copy it to the 1528fb1fc7adSLuis R. Rodriguez * wiphy 1529fb1fc7adSLuis R. Rodriguez */ 153028da32d7SLuis R. Rodriguez if (r == -EALREADY && 15317db90f4aSLuis R. Rodriguez pending_request->initiator == 15327db90f4aSLuis R. Rodriguez NL80211_REGDOM_SET_BY_DRIVER) { 15333e0c3ff3SLuis R. Rodriguez r = reg_copy_regd(&wiphy->regd, cfg80211_regdomain); 1534d951c1ddSLuis R. Rodriguez if (r) { 1535d951c1ddSLuis R. Rodriguez kfree(pending_request); 15363e0c3ff3SLuis R. Rodriguez return r; 1537d951c1ddSLuis R. Rodriguez } 15383e0c3ff3SLuis R. Rodriguez r = -EALREADY; 15393e0c3ff3SLuis R. Rodriguez goto new_request; 15403e0c3ff3SLuis R. Rodriguez } 1541d951c1ddSLuis R. Rodriguez kfree(pending_request); 15423e0c3ff3SLuis R. Rodriguez return r; 15433e0c3ff3SLuis R. Rodriguez } 1544b2e1b302SLuis R. Rodriguez 15453e0c3ff3SLuis R. Rodriguez new_request: 1546f6037d09SJohannes Berg kfree(last_request); 1547d951c1ddSLuis R. Rodriguez 1548d951c1ddSLuis R. Rodriguez last_request = pending_request; 1549d951c1ddSLuis R. Rodriguez last_request->intersect = intersect; 1550d951c1ddSLuis R. Rodriguez 1551d951c1ddSLuis R. Rodriguez pending_request = NULL; 15523e0c3ff3SLuis R. Rodriguez 15533e0c3ff3SLuis R. Rodriguez /* When r == REG_INTERSECT we do need to call CRDA */ 155473d54c9eSLuis R. Rodriguez if (r < 0) { 155573d54c9eSLuis R. Rodriguez /* 155673d54c9eSLuis R. Rodriguez * Since CRDA will not be called in this case as we already 155773d54c9eSLuis R. Rodriguez * have applied the requested regulatory domain before we just 155873d54c9eSLuis R. Rodriguez * inform userspace we have processed the request 155973d54c9eSLuis R. Rodriguez */ 156073d54c9eSLuis R. Rodriguez if (r == -EALREADY) 156173d54c9eSLuis R. Rodriguez nl80211_send_reg_change_event(last_request); 15623e0c3ff3SLuis R. Rodriguez return r; 156373d54c9eSLuis R. Rodriguez } 15643e0c3ff3SLuis R. Rodriguez 1565d951c1ddSLuis R. Rodriguez return call_crda(last_request->alpha2); 1566b2e1b302SLuis R. Rodriguez } 1567b2e1b302SLuis R. Rodriguez 156830a548c7SLuis R. Rodriguez /* This processes *all* regulatory hints */ 1569d951c1ddSLuis R. Rodriguez static void reg_process_hint(struct regulatory_request *reg_request) 1570fe33eb39SLuis R. Rodriguez { 1571fe33eb39SLuis R. Rodriguez int r = 0; 1572fe33eb39SLuis R. Rodriguez struct wiphy *wiphy = NULL; 1573fe33eb39SLuis R. Rodriguez 1574fe33eb39SLuis R. Rodriguez BUG_ON(!reg_request->alpha2); 1575fe33eb39SLuis R. Rodriguez 1576fe33eb39SLuis R. Rodriguez mutex_lock(&cfg80211_mutex); 1577fe33eb39SLuis R. Rodriguez 1578fe33eb39SLuis R. Rodriguez if (wiphy_idx_valid(reg_request->wiphy_idx)) 1579fe33eb39SLuis R. Rodriguez wiphy = wiphy_idx_to_wiphy(reg_request->wiphy_idx); 1580fe33eb39SLuis R. Rodriguez 15817db90f4aSLuis R. Rodriguez if (reg_request->initiator == NL80211_REGDOM_SET_BY_DRIVER && 1582fe33eb39SLuis R. Rodriguez !wiphy) { 1583d951c1ddSLuis R. Rodriguez kfree(reg_request); 1584fe33eb39SLuis R. Rodriguez goto out; 1585fe33eb39SLuis R. Rodriguez } 1586fe33eb39SLuis R. Rodriguez 158728da32d7SLuis R. Rodriguez r = __regulatory_hint(wiphy, reg_request); 1588fe33eb39SLuis R. Rodriguez /* This is required so that the orig_* parameters are saved */ 1589fe33eb39SLuis R. Rodriguez if (r == -EALREADY && wiphy && wiphy->strict_regulatory) 1590fe33eb39SLuis R. Rodriguez wiphy_update_regulatory(wiphy, reg_request->initiator); 1591fe33eb39SLuis R. Rodriguez out: 1592fe33eb39SLuis R. Rodriguez mutex_unlock(&cfg80211_mutex); 1593fe33eb39SLuis R. Rodriguez } 1594fe33eb39SLuis R. Rodriguez 15957db90f4aSLuis R. Rodriguez /* Processes regulatory hints, this is all the NL80211_REGDOM_SET_BY_* */ 1596fe33eb39SLuis R. Rodriguez static void reg_process_pending_hints(void) 1597fe33eb39SLuis R. Rodriguez { 1598fe33eb39SLuis R. Rodriguez struct regulatory_request *reg_request; 1599fe33eb39SLuis R. Rodriguez 1600fe33eb39SLuis R. Rodriguez spin_lock(®_requests_lock); 1601fe33eb39SLuis R. Rodriguez while (!list_empty(®_requests_list)) { 1602fe33eb39SLuis R. Rodriguez reg_request = list_first_entry(®_requests_list, 1603fe33eb39SLuis R. Rodriguez struct regulatory_request, 1604fe33eb39SLuis R. Rodriguez list); 1605fe33eb39SLuis R. Rodriguez list_del_init(®_request->list); 1606fe33eb39SLuis R. Rodriguez 1607d951c1ddSLuis R. Rodriguez spin_unlock(®_requests_lock); 1608d951c1ddSLuis R. Rodriguez reg_process_hint(reg_request); 1609fe33eb39SLuis R. Rodriguez spin_lock(®_requests_lock); 1610fe33eb39SLuis R. Rodriguez } 1611fe33eb39SLuis R. Rodriguez spin_unlock(®_requests_lock); 1612fe33eb39SLuis R. Rodriguez } 1613fe33eb39SLuis R. Rodriguez 1614e38f8a7aSLuis R. Rodriguez /* Processes beacon hints -- this has nothing to do with country IEs */ 1615e38f8a7aSLuis R. Rodriguez static void reg_process_pending_beacon_hints(void) 1616e38f8a7aSLuis R. Rodriguez { 1617e38f8a7aSLuis R. Rodriguez struct cfg80211_registered_device *drv; 1618e38f8a7aSLuis R. Rodriguez struct reg_beacon *pending_beacon, *tmp; 1619e38f8a7aSLuis R. Rodriguez 1620e38f8a7aSLuis R. Rodriguez mutex_lock(&cfg80211_mutex); 1621e38f8a7aSLuis R. Rodriguez 1622e38f8a7aSLuis R. Rodriguez /* This goes through the _pending_ beacon list */ 1623e38f8a7aSLuis R. Rodriguez spin_lock_bh(®_pending_beacons_lock); 1624e38f8a7aSLuis R. Rodriguez 1625e38f8a7aSLuis R. Rodriguez if (list_empty(®_pending_beacons)) { 1626e38f8a7aSLuis R. Rodriguez spin_unlock_bh(®_pending_beacons_lock); 1627e38f8a7aSLuis R. Rodriguez goto out; 1628e38f8a7aSLuis R. Rodriguez } 1629e38f8a7aSLuis R. Rodriguez 1630e38f8a7aSLuis R. Rodriguez list_for_each_entry_safe(pending_beacon, tmp, 1631e38f8a7aSLuis R. Rodriguez ®_pending_beacons, list) { 1632e38f8a7aSLuis R. Rodriguez 1633e38f8a7aSLuis R. Rodriguez list_del_init(&pending_beacon->list); 1634e38f8a7aSLuis R. Rodriguez 1635e38f8a7aSLuis R. Rodriguez /* Applies the beacon hint to current wiphys */ 1636e38f8a7aSLuis R. Rodriguez list_for_each_entry(drv, &cfg80211_drv_list, list) 1637e38f8a7aSLuis R. Rodriguez wiphy_update_new_beacon(&drv->wiphy, pending_beacon); 1638e38f8a7aSLuis R. Rodriguez 1639e38f8a7aSLuis R. Rodriguez /* Remembers the beacon hint for new wiphys or reg changes */ 1640e38f8a7aSLuis R. Rodriguez list_add_tail(&pending_beacon->list, ®_beacon_list); 1641e38f8a7aSLuis R. Rodriguez } 1642e38f8a7aSLuis R. Rodriguez 1643e38f8a7aSLuis R. Rodriguez spin_unlock_bh(®_pending_beacons_lock); 1644e38f8a7aSLuis R. Rodriguez out: 1645e38f8a7aSLuis R. Rodriguez mutex_unlock(&cfg80211_mutex); 1646e38f8a7aSLuis R. Rodriguez } 1647e38f8a7aSLuis R. Rodriguez 1648fe33eb39SLuis R. Rodriguez static void reg_todo(struct work_struct *work) 1649fe33eb39SLuis R. Rodriguez { 1650fe33eb39SLuis R. Rodriguez reg_process_pending_hints(); 1651e38f8a7aSLuis R. Rodriguez reg_process_pending_beacon_hints(); 1652fe33eb39SLuis R. Rodriguez } 1653fe33eb39SLuis R. Rodriguez 1654fe33eb39SLuis R. Rodriguez static DECLARE_WORK(reg_work, reg_todo); 1655fe33eb39SLuis R. Rodriguez 1656fe33eb39SLuis R. Rodriguez static void queue_regulatory_request(struct regulatory_request *request) 1657fe33eb39SLuis R. Rodriguez { 1658fe33eb39SLuis R. Rodriguez spin_lock(®_requests_lock); 1659fe33eb39SLuis R. Rodriguez list_add_tail(&request->list, ®_requests_list); 1660fe33eb39SLuis R. Rodriguez spin_unlock(®_requests_lock); 1661fe33eb39SLuis R. Rodriguez 1662fe33eb39SLuis R. Rodriguez schedule_work(®_work); 1663fe33eb39SLuis R. Rodriguez } 1664fe33eb39SLuis R. Rodriguez 1665fe33eb39SLuis R. Rodriguez /* Core regulatory hint -- happens once during cfg80211_init() */ 1666ba25c141SLuis R. Rodriguez static int regulatory_hint_core(const char *alpha2) 1667ba25c141SLuis R. Rodriguez { 1668ba25c141SLuis R. Rodriguez struct regulatory_request *request; 1669ba25c141SLuis R. Rodriguez 1670ba25c141SLuis R. Rodriguez BUG_ON(last_request); 1671ba25c141SLuis R. Rodriguez 1672ba25c141SLuis R. Rodriguez request = kzalloc(sizeof(struct regulatory_request), 1673ba25c141SLuis R. Rodriguez GFP_KERNEL); 1674ba25c141SLuis R. Rodriguez if (!request) 1675ba25c141SLuis R. Rodriguez return -ENOMEM; 1676ba25c141SLuis R. Rodriguez 1677ba25c141SLuis R. Rodriguez request->alpha2[0] = alpha2[0]; 1678ba25c141SLuis R. Rodriguez request->alpha2[1] = alpha2[1]; 16797db90f4aSLuis R. Rodriguez request->initiator = NL80211_REGDOM_SET_BY_CORE; 1680ba25c141SLuis R. Rodriguez 1681fe33eb39SLuis R. Rodriguez queue_regulatory_request(request); 1682ba25c141SLuis R. Rodriguez 16835078b2e3SLuis R. Rodriguez /* 16845078b2e3SLuis R. Rodriguez * This ensures last_request is populated once modules 16855078b2e3SLuis R. Rodriguez * come swinging in and calling regulatory hints and 16865078b2e3SLuis R. Rodriguez * wiphy_apply_custom_regulatory(). 16875078b2e3SLuis R. Rodriguez */ 16885078b2e3SLuis R. Rodriguez flush_scheduled_work(); 16895078b2e3SLuis R. Rodriguez 1690fe33eb39SLuis R. Rodriguez return 0; 1691ba25c141SLuis R. Rodriguez } 1692ba25c141SLuis R. Rodriguez 1693fe33eb39SLuis R. Rodriguez /* User hints */ 1694fe33eb39SLuis R. Rodriguez int regulatory_hint_user(const char *alpha2) 1695b2e1b302SLuis R. Rodriguez { 1696fe33eb39SLuis R. Rodriguez struct regulatory_request *request; 1697fe33eb39SLuis R. Rodriguez 1698be3d4810SJohannes Berg BUG_ON(!alpha2); 1699b2e1b302SLuis R. Rodriguez 1700fe33eb39SLuis R. Rodriguez request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); 1701fe33eb39SLuis R. Rodriguez if (!request) 1702fe33eb39SLuis R. Rodriguez return -ENOMEM; 1703fe33eb39SLuis R. Rodriguez 1704fe33eb39SLuis R. Rodriguez request->wiphy_idx = WIPHY_IDX_STALE; 1705fe33eb39SLuis R. Rodriguez request->alpha2[0] = alpha2[0]; 1706fe33eb39SLuis R. Rodriguez request->alpha2[1] = alpha2[1]; 17077db90f4aSLuis R. Rodriguez request->initiator = NL80211_REGDOM_SET_BY_USER, 1708fe33eb39SLuis R. Rodriguez 1709fe33eb39SLuis R. Rodriguez queue_regulatory_request(request); 1710fe33eb39SLuis R. Rodriguez 1711fe33eb39SLuis R. Rodriguez return 0; 1712fe33eb39SLuis R. Rodriguez } 1713fe33eb39SLuis R. Rodriguez 1714fe33eb39SLuis R. Rodriguez /* Driver hints */ 1715fe33eb39SLuis R. Rodriguez int regulatory_hint(struct wiphy *wiphy, const char *alpha2) 1716fe33eb39SLuis R. Rodriguez { 1717fe33eb39SLuis R. Rodriguez struct regulatory_request *request; 1718fe33eb39SLuis R. Rodriguez 1719fe33eb39SLuis R. Rodriguez BUG_ON(!alpha2); 1720fe33eb39SLuis R. Rodriguez BUG_ON(!wiphy); 1721fe33eb39SLuis R. Rodriguez 1722fe33eb39SLuis R. Rodriguez request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); 1723fe33eb39SLuis R. Rodriguez if (!request) 1724fe33eb39SLuis R. Rodriguez return -ENOMEM; 1725fe33eb39SLuis R. Rodriguez 1726fe33eb39SLuis R. Rodriguez request->wiphy_idx = get_wiphy_idx(wiphy); 1727fe33eb39SLuis R. Rodriguez 1728fe33eb39SLuis R. Rodriguez /* Must have registered wiphy first */ 1729fe33eb39SLuis R. Rodriguez BUG_ON(!wiphy_idx_valid(request->wiphy_idx)); 1730fe33eb39SLuis R. Rodriguez 1731fe33eb39SLuis R. Rodriguez request->alpha2[0] = alpha2[0]; 1732fe33eb39SLuis R. Rodriguez request->alpha2[1] = alpha2[1]; 17337db90f4aSLuis R. Rodriguez request->initiator = NL80211_REGDOM_SET_BY_DRIVER; 1734fe33eb39SLuis R. Rodriguez 1735fe33eb39SLuis R. Rodriguez queue_regulatory_request(request); 1736fe33eb39SLuis R. Rodriguez 1737fe33eb39SLuis R. Rodriguez return 0; 1738b2e1b302SLuis R. Rodriguez } 1739b2e1b302SLuis R. Rodriguez EXPORT_SYMBOL(regulatory_hint); 1740b2e1b302SLuis R. Rodriguez 17413f2355cbSLuis R. Rodriguez static bool reg_same_country_ie_hint(struct wiphy *wiphy, 17423f2355cbSLuis R. Rodriguez u32 country_ie_checksum) 17433f2355cbSLuis R. Rodriguez { 1744806a9e39SLuis R. Rodriguez struct wiphy *request_wiphy; 1745806a9e39SLuis R. Rodriguez 1746761cf7ecSLuis R. Rodriguez assert_cfg80211_lock(); 1747761cf7ecSLuis R. Rodriguez 1748cc0b6fe8SLuis R. Rodriguez if (unlikely(last_request->initiator != 1749cc0b6fe8SLuis R. Rodriguez NL80211_REGDOM_SET_BY_COUNTRY_IE)) 1750cc0b6fe8SLuis R. Rodriguez return false; 1751cc0b6fe8SLuis R. Rodriguez 1752806a9e39SLuis R. Rodriguez request_wiphy = wiphy_idx_to_wiphy(last_request->wiphy_idx); 1753806a9e39SLuis R. Rodriguez 1754806a9e39SLuis R. Rodriguez if (!request_wiphy) 17553f2355cbSLuis R. Rodriguez return false; 1756806a9e39SLuis R. Rodriguez 1757806a9e39SLuis R. Rodriguez if (likely(request_wiphy != wiphy)) 17583f2355cbSLuis R. Rodriguez return !country_ie_integrity_changes(country_ie_checksum); 1759fb1fc7adSLuis R. Rodriguez /* 1760fb1fc7adSLuis R. Rodriguez * We should not have let these through at this point, they 17613f2355cbSLuis R. Rodriguez * should have been picked up earlier by the first alpha2 check 1762fb1fc7adSLuis R. Rodriguez * on the device 1763fb1fc7adSLuis R. Rodriguez */ 17643f2355cbSLuis R. Rodriguez if (WARN_ON(!country_ie_integrity_changes(country_ie_checksum))) 17653f2355cbSLuis R. Rodriguez return true; 17663f2355cbSLuis R. Rodriguez return false; 17673f2355cbSLuis R. Rodriguez } 17683f2355cbSLuis R. Rodriguez 17693f2355cbSLuis R. Rodriguez void regulatory_hint_11d(struct wiphy *wiphy, 17703f2355cbSLuis R. Rodriguez u8 *country_ie, 17713f2355cbSLuis R. Rodriguez u8 country_ie_len) 17723f2355cbSLuis R. Rodriguez { 17733f2355cbSLuis R. Rodriguez struct ieee80211_regdomain *rd = NULL; 17743f2355cbSLuis R. Rodriguez char alpha2[2]; 17753f2355cbSLuis R. Rodriguez u32 checksum = 0; 17763f2355cbSLuis R. Rodriguez enum environment_cap env = ENVIRON_ANY; 1777fe33eb39SLuis R. Rodriguez struct regulatory_request *request; 17783f2355cbSLuis R. Rodriguez 1779a1794390SLuis R. Rodriguez mutex_lock(&cfg80211_mutex); 17803f2355cbSLuis R. Rodriguez 1781d335fe63SLuis R. Rodriguez if (unlikely(!last_request)) { 1782d335fe63SLuis R. Rodriguez mutex_unlock(&cfg80211_mutex); 1783d335fe63SLuis R. Rodriguez return; 1784d335fe63SLuis R. Rodriguez } 1785d335fe63SLuis R. Rodriguez 17863f2355cbSLuis R. Rodriguez /* IE len must be evenly divisible by 2 */ 17873f2355cbSLuis R. Rodriguez if (country_ie_len & 0x01) 17883f2355cbSLuis R. Rodriguez goto out; 17893f2355cbSLuis R. Rodriguez 17903f2355cbSLuis R. Rodriguez if (country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN) 17913f2355cbSLuis R. Rodriguez goto out; 17923f2355cbSLuis R. Rodriguez 1793fb1fc7adSLuis R. Rodriguez /* 1794fb1fc7adSLuis R. Rodriguez * Pending country IE processing, this can happen after we 17953f2355cbSLuis R. Rodriguez * call CRDA and wait for a response if a beacon was received before 1796fb1fc7adSLuis R. Rodriguez * we were able to process the last regulatory_hint_11d() call 1797fb1fc7adSLuis R. Rodriguez */ 17983f2355cbSLuis R. Rodriguez if (country_ie_regdomain) 17993f2355cbSLuis R. Rodriguez goto out; 18003f2355cbSLuis R. Rodriguez 18013f2355cbSLuis R. Rodriguez alpha2[0] = country_ie[0]; 18023f2355cbSLuis R. Rodriguez alpha2[1] = country_ie[1]; 18033f2355cbSLuis R. Rodriguez 18043f2355cbSLuis R. Rodriguez if (country_ie[2] == 'I') 18053f2355cbSLuis R. Rodriguez env = ENVIRON_INDOOR; 18063f2355cbSLuis R. Rodriguez else if (country_ie[2] == 'O') 18073f2355cbSLuis R. Rodriguez env = ENVIRON_OUTDOOR; 18083f2355cbSLuis R. Rodriguez 1809fb1fc7adSLuis R. Rodriguez /* 1810fb1fc7adSLuis R. Rodriguez * We will run this for *every* beacon processed for the BSSID, so 18113f2355cbSLuis R. Rodriguez * we optimize an early check to exit out early if we don't have to 1812fb1fc7adSLuis R. Rodriguez * do anything 1813fb1fc7adSLuis R. Rodriguez */ 1814cc0b6fe8SLuis R. Rodriguez if (likely(last_request->initiator == 1815cc0b6fe8SLuis R. Rodriguez NL80211_REGDOM_SET_BY_COUNTRY_IE && 1816cc0b6fe8SLuis R. Rodriguez wiphy_idx_valid(last_request->wiphy_idx))) { 18173f2355cbSLuis R. Rodriguez struct cfg80211_registered_device *drv_last_ie; 18183f2355cbSLuis R. Rodriguez 1819806a9e39SLuis R. Rodriguez drv_last_ie = 1820806a9e39SLuis R. Rodriguez cfg80211_drv_by_wiphy_idx(last_request->wiphy_idx); 18213f2355cbSLuis R. Rodriguez 1822fb1fc7adSLuis R. Rodriguez /* 1823fb1fc7adSLuis R. Rodriguez * Lets keep this simple -- we trust the first AP 1824fb1fc7adSLuis R. Rodriguez * after we intersect with CRDA 1825fb1fc7adSLuis R. Rodriguez */ 1826806a9e39SLuis R. Rodriguez if (likely(&drv_last_ie->wiphy == wiphy)) { 1827fb1fc7adSLuis R. Rodriguez /* 1828fb1fc7adSLuis R. Rodriguez * Ignore IEs coming in on this wiphy 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 } 1836fb1fc7adSLuis R. Rodriguez /* 1837fb1fc7adSLuis R. Rodriguez * the wiphy moved on to another BSSID or the AP 18383f2355cbSLuis R. Rodriguez * was reconfigured. XXX: We need to deal with the 18393f2355cbSLuis R. Rodriguez * case where the user suspends and goes to goes 18403f2355cbSLuis R. Rodriguez * to another country, and then gets IEs from an 1841fb1fc7adSLuis R. Rodriguez * AP with different settings 1842fb1fc7adSLuis R. Rodriguez */ 18433f2355cbSLuis R. Rodriguez goto out; 18443f2355cbSLuis R. Rodriguez } else { 1845fb1fc7adSLuis R. Rodriguez /* 1846fb1fc7adSLuis R. Rodriguez * Ignore IEs coming in on two separate wiphys with 1847fb1fc7adSLuis R. Rodriguez * the same alpha2 and environment cap 1848fb1fc7adSLuis R. Rodriguez */ 18493f2355cbSLuis R. Rodriguez if (likely(alpha2_equal(drv_last_ie->country_ie_alpha2, 18503f2355cbSLuis R. Rodriguez alpha2) && 18513f2355cbSLuis R. Rodriguez env == drv_last_ie->env)) { 18523f2355cbSLuis R. Rodriguez goto out; 18533f2355cbSLuis R. Rodriguez } 18543f2355cbSLuis R. Rodriguez /* We could potentially intersect though */ 18553f2355cbSLuis R. Rodriguez goto out; 18563f2355cbSLuis R. Rodriguez } 18573f2355cbSLuis R. Rodriguez } 18583f2355cbSLuis R. Rodriguez 18593f2355cbSLuis R. Rodriguez rd = country_ie_2_rd(country_ie, country_ie_len, &checksum); 18603f2355cbSLuis R. Rodriguez if (!rd) 18613f2355cbSLuis R. Rodriguez goto out; 18623f2355cbSLuis R. Rodriguez 1863915278e0SLuis R. Rodriguez /* 1864915278e0SLuis R. Rodriguez * This will not happen right now but we leave it here for the 18653f2355cbSLuis R. Rodriguez * the future when we want to add suspend/resume support and having 18663f2355cbSLuis R. Rodriguez * the user move to another country after doing so, or having the user 1867915278e0SLuis R. Rodriguez * move to another AP. Right now we just trust the first AP. 1868915278e0SLuis R. Rodriguez * 1869915278e0SLuis R. Rodriguez * If we hit this before we add this support we want to be informed of 1870915278e0SLuis R. Rodriguez * it as it would indicate a mistake in the current design 1871915278e0SLuis R. Rodriguez */ 1872915278e0SLuis R. Rodriguez if (WARN_ON(reg_same_country_ie_hint(wiphy, checksum))) 18730441d6ffSLuis R. Rodriguez goto free_rd_out; 18743f2355cbSLuis R. Rodriguez 1875fe33eb39SLuis R. Rodriguez request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); 1876fe33eb39SLuis R. Rodriguez if (!request) 1877fe33eb39SLuis R. Rodriguez goto free_rd_out; 1878fe33eb39SLuis R. Rodriguez 1879fb1fc7adSLuis R. Rodriguez /* 1880fb1fc7adSLuis R. Rodriguez * We keep this around for when CRDA comes back with a response so 1881fb1fc7adSLuis R. Rodriguez * we can intersect with that 1882fb1fc7adSLuis R. Rodriguez */ 18833f2355cbSLuis R. Rodriguez country_ie_regdomain = rd; 18843f2355cbSLuis R. Rodriguez 1885fe33eb39SLuis R. Rodriguez request->wiphy_idx = get_wiphy_idx(wiphy); 1886fe33eb39SLuis R. Rodriguez request->alpha2[0] = rd->alpha2[0]; 1887fe33eb39SLuis R. Rodriguez request->alpha2[1] = rd->alpha2[1]; 18887db90f4aSLuis R. Rodriguez request->initiator = NL80211_REGDOM_SET_BY_COUNTRY_IE; 1889fe33eb39SLuis R. Rodriguez request->country_ie_checksum = checksum; 1890fe33eb39SLuis R. Rodriguez request->country_ie_env = env; 18913f2355cbSLuis R. Rodriguez 1892fe33eb39SLuis R. Rodriguez mutex_unlock(&cfg80211_mutex); 1893fe33eb39SLuis R. Rodriguez 1894fe33eb39SLuis R. Rodriguez queue_regulatory_request(request); 1895fe33eb39SLuis R. Rodriguez 1896fe33eb39SLuis R. Rodriguez return; 18970441d6ffSLuis R. Rodriguez 18980441d6ffSLuis R. Rodriguez free_rd_out: 18990441d6ffSLuis R. Rodriguez kfree(rd); 19003f2355cbSLuis R. Rodriguez out: 1901a1794390SLuis R. Rodriguez mutex_unlock(&cfg80211_mutex); 19023f2355cbSLuis R. Rodriguez } 19033f2355cbSLuis R. Rodriguez EXPORT_SYMBOL(regulatory_hint_11d); 1904b2e1b302SLuis R. Rodriguez 1905e38f8a7aSLuis R. Rodriguez static bool freq_is_chan_12_13_14(u16 freq) 1906e38f8a7aSLuis R. Rodriguez { 1907e38f8a7aSLuis R. Rodriguez if (freq == ieee80211_channel_to_frequency(12) || 1908e38f8a7aSLuis R. Rodriguez freq == ieee80211_channel_to_frequency(13) || 1909e38f8a7aSLuis R. Rodriguez freq == ieee80211_channel_to_frequency(14)) 1910e38f8a7aSLuis R. Rodriguez return true; 1911e38f8a7aSLuis R. Rodriguez return false; 1912e38f8a7aSLuis R. Rodriguez } 1913e38f8a7aSLuis R. Rodriguez 1914e38f8a7aSLuis R. Rodriguez int regulatory_hint_found_beacon(struct wiphy *wiphy, 1915e38f8a7aSLuis R. Rodriguez struct ieee80211_channel *beacon_chan, 1916e38f8a7aSLuis R. Rodriguez gfp_t gfp) 1917e38f8a7aSLuis R. Rodriguez { 1918e38f8a7aSLuis R. Rodriguez struct reg_beacon *reg_beacon; 1919e38f8a7aSLuis R. Rodriguez 1920e38f8a7aSLuis R. Rodriguez if (likely((beacon_chan->beacon_found || 1921e38f8a7aSLuis R. Rodriguez (beacon_chan->flags & IEEE80211_CHAN_RADAR) || 1922e38f8a7aSLuis R. Rodriguez (beacon_chan->band == IEEE80211_BAND_2GHZ && 1923e38f8a7aSLuis R. Rodriguez !freq_is_chan_12_13_14(beacon_chan->center_freq))))) 1924e38f8a7aSLuis R. Rodriguez return 0; 1925e38f8a7aSLuis R. Rodriguez 1926e38f8a7aSLuis R. Rodriguez reg_beacon = kzalloc(sizeof(struct reg_beacon), gfp); 1927e38f8a7aSLuis R. Rodriguez if (!reg_beacon) 1928e38f8a7aSLuis R. Rodriguez return -ENOMEM; 1929e38f8a7aSLuis R. Rodriguez 1930e38f8a7aSLuis R. Rodriguez #ifdef CONFIG_CFG80211_REG_DEBUG 1931e38f8a7aSLuis R. Rodriguez printk(KERN_DEBUG "cfg80211: Found new beacon on " 1932e38f8a7aSLuis R. Rodriguez "frequency: %d MHz (Ch %d) on %s\n", 1933e38f8a7aSLuis R. Rodriguez beacon_chan->center_freq, 1934e38f8a7aSLuis R. Rodriguez ieee80211_frequency_to_channel(beacon_chan->center_freq), 1935e38f8a7aSLuis R. Rodriguez wiphy_name(wiphy)); 1936e38f8a7aSLuis R. Rodriguez #endif 1937e38f8a7aSLuis R. Rodriguez memcpy(®_beacon->chan, beacon_chan, 1938e38f8a7aSLuis R. Rodriguez sizeof(struct ieee80211_channel)); 1939e38f8a7aSLuis R. Rodriguez 1940e38f8a7aSLuis R. Rodriguez 1941e38f8a7aSLuis R. Rodriguez /* 1942e38f8a7aSLuis R. Rodriguez * Since we can be called from BH or and non-BH context 1943e38f8a7aSLuis R. Rodriguez * we must use spin_lock_bh() 1944e38f8a7aSLuis R. Rodriguez */ 1945e38f8a7aSLuis R. Rodriguez spin_lock_bh(®_pending_beacons_lock); 1946e38f8a7aSLuis R. Rodriguez list_add_tail(®_beacon->list, ®_pending_beacons); 1947e38f8a7aSLuis R. Rodriguez spin_unlock_bh(®_pending_beacons_lock); 1948e38f8a7aSLuis R. Rodriguez 1949e38f8a7aSLuis R. Rodriguez schedule_work(®_work); 1950e38f8a7aSLuis R. Rodriguez 1951e38f8a7aSLuis R. Rodriguez return 0; 1952e38f8a7aSLuis R. Rodriguez } 1953e38f8a7aSLuis R. Rodriguez 1954a3d2eaf0SJohannes Berg static void print_rd_rules(const struct ieee80211_regdomain *rd) 1955b2e1b302SLuis R. Rodriguez { 1956b2e1b302SLuis R. Rodriguez unsigned int i; 1957a3d2eaf0SJohannes Berg const struct ieee80211_reg_rule *reg_rule = NULL; 1958a3d2eaf0SJohannes Berg const struct ieee80211_freq_range *freq_range = NULL; 1959a3d2eaf0SJohannes Berg const struct ieee80211_power_rule *power_rule = NULL; 1960b2e1b302SLuis R. Rodriguez 1961b2e1b302SLuis R. Rodriguez printk(KERN_INFO "\t(start_freq - end_freq @ bandwidth), " 1962b2e1b302SLuis R. Rodriguez "(max_antenna_gain, max_eirp)\n"); 1963b2e1b302SLuis R. Rodriguez 1964b2e1b302SLuis R. Rodriguez for (i = 0; i < rd->n_reg_rules; i++) { 1965b2e1b302SLuis R. Rodriguez reg_rule = &rd->reg_rules[i]; 1966b2e1b302SLuis R. Rodriguez freq_range = ®_rule->freq_range; 1967b2e1b302SLuis R. Rodriguez power_rule = ®_rule->power_rule; 1968b2e1b302SLuis R. Rodriguez 1969fb1fc7adSLuis R. Rodriguez /* 1970fb1fc7adSLuis R. Rodriguez * There may not be documentation for max antenna gain 1971fb1fc7adSLuis R. Rodriguez * in certain regions 1972fb1fc7adSLuis R. Rodriguez */ 1973b2e1b302SLuis R. Rodriguez if (power_rule->max_antenna_gain) 1974b2e1b302SLuis R. Rodriguez printk(KERN_INFO "\t(%d KHz - %d KHz @ %d KHz), " 1975b2e1b302SLuis R. Rodriguez "(%d mBi, %d mBm)\n", 1976b2e1b302SLuis R. Rodriguez freq_range->start_freq_khz, 1977b2e1b302SLuis R. Rodriguez freq_range->end_freq_khz, 1978b2e1b302SLuis R. Rodriguez freq_range->max_bandwidth_khz, 1979b2e1b302SLuis R. Rodriguez power_rule->max_antenna_gain, 1980b2e1b302SLuis R. Rodriguez power_rule->max_eirp); 1981b2e1b302SLuis R. Rodriguez else 1982b2e1b302SLuis R. Rodriguez printk(KERN_INFO "\t(%d KHz - %d KHz @ %d KHz), " 1983b2e1b302SLuis R. Rodriguez "(N/A, %d mBm)\n", 1984b2e1b302SLuis R. Rodriguez freq_range->start_freq_khz, 1985b2e1b302SLuis R. Rodriguez freq_range->end_freq_khz, 1986b2e1b302SLuis R. Rodriguez freq_range->max_bandwidth_khz, 1987b2e1b302SLuis R. Rodriguez power_rule->max_eirp); 1988b2e1b302SLuis R. Rodriguez } 1989b2e1b302SLuis R. Rodriguez } 1990b2e1b302SLuis R. Rodriguez 1991a3d2eaf0SJohannes Berg static void print_regdomain(const struct ieee80211_regdomain *rd) 1992b2e1b302SLuis R. Rodriguez { 1993b2e1b302SLuis R. Rodriguez 19943f2355cbSLuis R. Rodriguez if (is_intersected_alpha2(rd->alpha2)) { 19953f2355cbSLuis R. Rodriguez 19967db90f4aSLuis R. Rodriguez if (last_request->initiator == 19977db90f4aSLuis R. Rodriguez NL80211_REGDOM_SET_BY_COUNTRY_IE) { 1998806a9e39SLuis R. Rodriguez struct cfg80211_registered_device *drv; 1999806a9e39SLuis R. Rodriguez drv = cfg80211_drv_by_wiphy_idx( 2000806a9e39SLuis R. Rodriguez last_request->wiphy_idx); 2001806a9e39SLuis R. Rodriguez if (drv) { 20023f2355cbSLuis R. Rodriguez printk(KERN_INFO "cfg80211: Current regulatory " 20033f2355cbSLuis R. Rodriguez "domain updated by AP to: %c%c\n", 20043f2355cbSLuis R. Rodriguez drv->country_ie_alpha2[0], 20053f2355cbSLuis R. Rodriguez drv->country_ie_alpha2[1]); 20063f2355cbSLuis R. Rodriguez } else 20073f2355cbSLuis R. Rodriguez printk(KERN_INFO "cfg80211: Current regulatory " 20083f2355cbSLuis R. Rodriguez "domain intersected: \n"); 20093f2355cbSLuis R. Rodriguez } else 20103f2355cbSLuis R. Rodriguez printk(KERN_INFO "cfg80211: Current regulatory " 2011039498c6SLuis R. Rodriguez "domain intersected: \n"); 20123f2355cbSLuis R. Rodriguez } else if (is_world_regdom(rd->alpha2)) 2013b2e1b302SLuis R. Rodriguez printk(KERN_INFO "cfg80211: World regulatory " 2014b2e1b302SLuis R. Rodriguez "domain updated:\n"); 2015b2e1b302SLuis R. Rodriguez else { 2016b2e1b302SLuis R. Rodriguez if (is_unknown_alpha2(rd->alpha2)) 2017b2e1b302SLuis R. Rodriguez printk(KERN_INFO "cfg80211: Regulatory domain " 2018b2e1b302SLuis R. Rodriguez "changed to driver built-in settings " 2019b2e1b302SLuis R. Rodriguez "(unknown country)\n"); 2020b2e1b302SLuis R. Rodriguez else 2021b2e1b302SLuis R. Rodriguez printk(KERN_INFO "cfg80211: Regulatory domain " 2022b2e1b302SLuis R. Rodriguez "changed to country: %c%c\n", 2023b2e1b302SLuis R. Rodriguez rd->alpha2[0], rd->alpha2[1]); 2024b2e1b302SLuis R. Rodriguez } 2025b2e1b302SLuis R. Rodriguez print_rd_rules(rd); 2026b2e1b302SLuis R. Rodriguez } 2027b2e1b302SLuis R. Rodriguez 20282df78167SJohannes Berg static void print_regdomain_info(const struct ieee80211_regdomain *rd) 2029b2e1b302SLuis R. Rodriguez { 2030b2e1b302SLuis R. Rodriguez printk(KERN_INFO "cfg80211: Regulatory domain: %c%c\n", 2031b2e1b302SLuis R. Rodriguez rd->alpha2[0], rd->alpha2[1]); 2032b2e1b302SLuis R. Rodriguez print_rd_rules(rd); 2033b2e1b302SLuis R. Rodriguez } 2034b2e1b302SLuis R. Rodriguez 20353f2355cbSLuis R. Rodriguez #ifdef CONFIG_CFG80211_REG_DEBUG 20363f2355cbSLuis R. Rodriguez static 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 printk(KERN_DEBUG "cfg80211: Received country IE:\n"); 20423f2355cbSLuis R. Rodriguez print_regdomain_info(country_ie_regdomain); 20433f2355cbSLuis R. Rodriguez printk(KERN_DEBUG "cfg80211: CRDA thinks this should applied:\n"); 20443f2355cbSLuis R. Rodriguez print_regdomain_info(rd); 20453f2355cbSLuis R. Rodriguez if (intersected_rd) { 20463f2355cbSLuis R. Rodriguez printk(KERN_DEBUG "cfg80211: We intersect both of these " 20473f2355cbSLuis R. Rodriguez "and get:\n"); 2048667ecd01SLuis R. Rodriguez print_regdomain_info(intersected_rd); 20493f2355cbSLuis R. Rodriguez return; 20503f2355cbSLuis R. Rodriguez } 20513f2355cbSLuis R. Rodriguez printk(KERN_DEBUG "cfg80211: Intersection between both failed\n"); 20523f2355cbSLuis R. Rodriguez } 20533f2355cbSLuis R. Rodriguez #else 20543f2355cbSLuis R. Rodriguez static inline void reg_country_ie_process_debug( 20553f2355cbSLuis R. Rodriguez const struct ieee80211_regdomain *rd, 20563f2355cbSLuis R. Rodriguez const struct ieee80211_regdomain *country_ie_regdomain, 20573f2355cbSLuis R. Rodriguez const struct ieee80211_regdomain *intersected_rd) 20583f2355cbSLuis R. Rodriguez { 20593f2355cbSLuis R. Rodriguez } 20603f2355cbSLuis R. Rodriguez #endif 20613f2355cbSLuis R. Rodriguez 2062d2372b31SJohannes Berg /* Takes ownership of rd only if it doesn't fail */ 2063a3d2eaf0SJohannes Berg static int __set_regdom(const struct ieee80211_regdomain *rd) 2064b2e1b302SLuis R. Rodriguez { 20659c96477dSLuis R. Rodriguez const struct ieee80211_regdomain *intersected_rd = NULL; 20663f2355cbSLuis R. Rodriguez struct cfg80211_registered_device *drv = NULL; 2067806a9e39SLuis R. Rodriguez struct wiphy *request_wiphy; 2068b2e1b302SLuis R. Rodriguez /* Some basic sanity checks first */ 2069b2e1b302SLuis R. Rodriguez 2070b2e1b302SLuis R. Rodriguez if (is_world_regdom(rd->alpha2)) { 2071f6037d09SJohannes Berg if (WARN_ON(!reg_is_valid_request(rd->alpha2))) 2072b2e1b302SLuis R. Rodriguez return -EINVAL; 2073b2e1b302SLuis R. Rodriguez update_world_regdomain(rd); 2074b2e1b302SLuis R. Rodriguez return 0; 2075b2e1b302SLuis R. Rodriguez } 2076b2e1b302SLuis R. Rodriguez 2077b2e1b302SLuis R. Rodriguez if (!is_alpha2_set(rd->alpha2) && !is_an_alpha2(rd->alpha2) && 2078b2e1b302SLuis R. Rodriguez !is_unknown_alpha2(rd->alpha2)) 2079b2e1b302SLuis R. Rodriguez return -EINVAL; 2080b2e1b302SLuis R. Rodriguez 2081f6037d09SJohannes Berg if (!last_request) 2082b2e1b302SLuis R. Rodriguez return -EINVAL; 2083b2e1b302SLuis R. Rodriguez 2084fb1fc7adSLuis R. Rodriguez /* 2085fb1fc7adSLuis R. Rodriguez * Lets only bother proceeding on the same alpha2 if the current 20863f2355cbSLuis R. Rodriguez * rd is non static (it means CRDA was present and was used last) 2087fb1fc7adSLuis R. Rodriguez * and the pending request came in from a country IE 2088fb1fc7adSLuis R. Rodriguez */ 20897db90f4aSLuis R. Rodriguez if (last_request->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE) { 2090fb1fc7adSLuis R. Rodriguez /* 2091fb1fc7adSLuis R. Rodriguez * If someone else asked us to change the rd lets only bother 2092fb1fc7adSLuis R. Rodriguez * checking if the alpha2 changes if CRDA was already called 2093fb1fc7adSLuis R. Rodriguez */ 2094b2e1b302SLuis R. Rodriguez if (!is_old_static_regdom(cfg80211_regdomain) && 209569b1572bSLuis R. Rodriguez !regdom_changes(rd->alpha2)) 2096b2e1b302SLuis R. Rodriguez return -EINVAL; 20973f2355cbSLuis R. Rodriguez } 20983f2355cbSLuis R. Rodriguez 2099fb1fc7adSLuis R. Rodriguez /* 2100fb1fc7adSLuis R. Rodriguez * Now lets set the regulatory domain, update all driver channels 2101b2e1b302SLuis R. Rodriguez * and finally inform them of what we have done, in case they want 2102b2e1b302SLuis R. Rodriguez * to review or adjust their own settings based on their own 2103fb1fc7adSLuis R. Rodriguez * internal EEPROM data 2104fb1fc7adSLuis R. Rodriguez */ 2105b2e1b302SLuis R. Rodriguez 2106f6037d09SJohannes Berg if (WARN_ON(!reg_is_valid_request(rd->alpha2))) 2107b2e1b302SLuis R. Rodriguez return -EINVAL; 2108b2e1b302SLuis R. Rodriguez 2109b2e1b302SLuis R. Rodriguez if (!is_valid_rd(rd)) { 2110b2e1b302SLuis R. Rodriguez printk(KERN_ERR "cfg80211: Invalid " 2111b2e1b302SLuis R. Rodriguez "regulatory domain detected:\n"); 2112b2e1b302SLuis R. Rodriguez print_regdomain_info(rd); 2113b2e1b302SLuis R. Rodriguez return -EINVAL; 2114b2e1b302SLuis R. Rodriguez } 2115b2e1b302SLuis R. Rodriguez 2116806a9e39SLuis R. Rodriguez request_wiphy = wiphy_idx_to_wiphy(last_request->wiphy_idx); 2117806a9e39SLuis R. Rodriguez 2118b8295acdSLuis R. Rodriguez if (!last_request->intersect) { 21193e0c3ff3SLuis R. Rodriguez int r; 21203e0c3ff3SLuis R. Rodriguez 21217db90f4aSLuis R. Rodriguez if (last_request->initiator != NL80211_REGDOM_SET_BY_DRIVER) { 21223e0c3ff3SLuis R. Rodriguez reset_regdomains(); 21233e0c3ff3SLuis R. Rodriguez cfg80211_regdomain = rd; 21243e0c3ff3SLuis R. Rodriguez return 0; 21253e0c3ff3SLuis R. Rodriguez } 21263e0c3ff3SLuis R. Rodriguez 2127fb1fc7adSLuis R. Rodriguez /* 2128fb1fc7adSLuis R. Rodriguez * For a driver hint, lets copy the regulatory domain the 2129fb1fc7adSLuis R. Rodriguez * driver wanted to the wiphy to deal with conflicts 2130fb1fc7adSLuis R. Rodriguez */ 21313e0c3ff3SLuis R. Rodriguez 2132806a9e39SLuis R. Rodriguez BUG_ON(request_wiphy->regd); 21333e0c3ff3SLuis R. Rodriguez 2134806a9e39SLuis R. Rodriguez r = reg_copy_regd(&request_wiphy->regd, rd); 21353e0c3ff3SLuis R. Rodriguez if (r) 21363e0c3ff3SLuis R. Rodriguez return r; 21373e0c3ff3SLuis R. Rodriguez 2138b8295acdSLuis R. Rodriguez reset_regdomains(); 2139b8295acdSLuis R. Rodriguez cfg80211_regdomain = rd; 2140b8295acdSLuis R. Rodriguez return 0; 2141b8295acdSLuis R. Rodriguez } 2142b8295acdSLuis R. Rodriguez 2143b8295acdSLuis R. Rodriguez /* Intersection requires a bit more work */ 2144b8295acdSLuis R. Rodriguez 21457db90f4aSLuis R. Rodriguez if (last_request->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE) { 2146b8295acdSLuis R. Rodriguez 21479c96477dSLuis R. Rodriguez intersected_rd = regdom_intersect(rd, cfg80211_regdomain); 21489c96477dSLuis R. Rodriguez if (!intersected_rd) 21499c96477dSLuis R. Rodriguez return -EINVAL; 2150b8295acdSLuis R. Rodriguez 2151fb1fc7adSLuis R. Rodriguez /* 2152fb1fc7adSLuis R. Rodriguez * We can trash what CRDA provided now. 21533e0c3ff3SLuis R. Rodriguez * However if a driver requested this specific regulatory 2154fb1fc7adSLuis R. Rodriguez * domain we keep it for its private use 2155fb1fc7adSLuis R. Rodriguez */ 21567db90f4aSLuis R. Rodriguez if (last_request->initiator == NL80211_REGDOM_SET_BY_DRIVER) 2157806a9e39SLuis R. Rodriguez request_wiphy->regd = rd; 21583e0c3ff3SLuis R. Rodriguez else 21599c96477dSLuis R. Rodriguez kfree(rd); 21603e0c3ff3SLuis R. Rodriguez 2161b8295acdSLuis R. Rodriguez rd = NULL; 2162b8295acdSLuis R. Rodriguez 2163b8295acdSLuis R. Rodriguez reset_regdomains(); 2164b8295acdSLuis R. Rodriguez cfg80211_regdomain = intersected_rd; 2165b8295acdSLuis R. Rodriguez 2166b8295acdSLuis R. Rodriguez return 0; 21679c96477dSLuis R. Rodriguez } 21689c96477dSLuis R. Rodriguez 21693f2355cbSLuis R. Rodriguez /* 21703f2355cbSLuis R. Rodriguez * Country IE requests are handled a bit differently, we intersect 21713f2355cbSLuis R. Rodriguez * the country IE rd with what CRDA believes that country should have 21723f2355cbSLuis R. Rodriguez */ 21733f2355cbSLuis R. Rodriguez 2174729e9c76SLuis R. Rodriguez /* 2175729e9c76SLuis R. Rodriguez * Userspace could have sent two replies with only 2176729e9c76SLuis R. Rodriguez * one kernel request. By the second reply we would have 2177729e9c76SLuis R. Rodriguez * already processed and consumed the country_ie_regdomain. 2178729e9c76SLuis R. Rodriguez */ 2179729e9c76SLuis R. Rodriguez if (!country_ie_regdomain) 2180729e9c76SLuis R. Rodriguez return -EALREADY; 218186f04680SLuis R. Rodriguez BUG_ON(rd == country_ie_regdomain); 21823f2355cbSLuis R. Rodriguez 2183fb1fc7adSLuis R. Rodriguez /* 2184fb1fc7adSLuis R. Rodriguez * Intersect what CRDA returned and our what we 2185fb1fc7adSLuis R. Rodriguez * had built from the Country IE received 2186fb1fc7adSLuis R. Rodriguez */ 21873f2355cbSLuis R. Rodriguez 21883f2355cbSLuis R. Rodriguez intersected_rd = regdom_intersect(rd, country_ie_regdomain); 21893f2355cbSLuis R. Rodriguez 219086f04680SLuis R. Rodriguez reg_country_ie_process_debug(rd, 219186f04680SLuis R. Rodriguez country_ie_regdomain, 21923f2355cbSLuis R. Rodriguez intersected_rd); 21933f2355cbSLuis R. Rodriguez 21943f2355cbSLuis R. Rodriguez kfree(country_ie_regdomain); 21953f2355cbSLuis R. Rodriguez country_ie_regdomain = NULL; 21963f2355cbSLuis R. Rodriguez 21973f2355cbSLuis R. Rodriguez if (!intersected_rd) 21983f2355cbSLuis R. Rodriguez return -EINVAL; 21993f2355cbSLuis R. Rodriguez 2200806a9e39SLuis R. Rodriguez drv = wiphy_to_dev(request_wiphy); 22013f2355cbSLuis R. Rodriguez 22023f2355cbSLuis R. Rodriguez drv->country_ie_alpha2[0] = rd->alpha2[0]; 22033f2355cbSLuis R. Rodriguez drv->country_ie_alpha2[1] = rd->alpha2[1]; 22043f2355cbSLuis R. Rodriguez drv->env = last_request->country_ie_env; 22053f2355cbSLuis R. Rodriguez 22063f2355cbSLuis R. Rodriguez BUG_ON(intersected_rd == rd); 22073f2355cbSLuis R. Rodriguez 22083f2355cbSLuis R. Rodriguez kfree(rd); 22093f2355cbSLuis R. Rodriguez rd = NULL; 22103f2355cbSLuis R. Rodriguez 2211b8295acdSLuis R. Rodriguez reset_regdomains(); 22123f2355cbSLuis R. Rodriguez cfg80211_regdomain = intersected_rd; 2213b2e1b302SLuis R. Rodriguez 2214b2e1b302SLuis R. Rodriguez return 0; 2215b2e1b302SLuis R. Rodriguez } 2216b2e1b302SLuis R. Rodriguez 2217b2e1b302SLuis R. Rodriguez 2218fb1fc7adSLuis R. Rodriguez /* 2219fb1fc7adSLuis R. Rodriguez * Use this call to set the current regulatory domain. Conflicts with 2220b2e1b302SLuis R. Rodriguez * multiple drivers can be ironed out later. Caller must've already 2221fb1fc7adSLuis R. Rodriguez * kmalloc'd the rd structure. Caller must hold cfg80211_mutex 2222fb1fc7adSLuis R. Rodriguez */ 2223a3d2eaf0SJohannes Berg int set_regdom(const struct ieee80211_regdomain *rd) 2224b2e1b302SLuis R. Rodriguez { 2225b2e1b302SLuis R. Rodriguez int r; 2226b2e1b302SLuis R. Rodriguez 2227761cf7ecSLuis R. Rodriguez assert_cfg80211_lock(); 2228761cf7ecSLuis R. Rodriguez 2229b2e1b302SLuis R. Rodriguez /* Note that this doesn't update the wiphys, this is done below */ 2230b2e1b302SLuis R. Rodriguez r = __set_regdom(rd); 2231d2372b31SJohannes Berg if (r) { 2232d2372b31SJohannes Berg kfree(rd); 2233b2e1b302SLuis R. Rodriguez return r; 2234d2372b31SJohannes Berg } 2235b2e1b302SLuis R. Rodriguez 2236b2e1b302SLuis R. Rodriguez /* This would make this whole thing pointless */ 2237a01ddafdSLuis R. Rodriguez if (!last_request->intersect) 2238b2e1b302SLuis R. Rodriguez BUG_ON(rd != cfg80211_regdomain); 2239b2e1b302SLuis R. Rodriguez 2240b2e1b302SLuis R. Rodriguez /* update all wiphys now with the new established regulatory domain */ 2241f6037d09SJohannes Berg update_all_wiphy_regulatory(last_request->initiator); 2242b2e1b302SLuis R. Rodriguez 2243a01ddafdSLuis R. Rodriguez print_regdomain(cfg80211_regdomain); 2244b2e1b302SLuis R. Rodriguez 224573d54c9eSLuis R. Rodriguez nl80211_send_reg_change_event(last_request); 224673d54c9eSLuis R. Rodriguez 2247b2e1b302SLuis R. Rodriguez return r; 2248b2e1b302SLuis R. Rodriguez } 2249b2e1b302SLuis R. Rodriguez 2250a1794390SLuis R. Rodriguez /* Caller must hold cfg80211_mutex */ 22513f2355cbSLuis R. Rodriguez void reg_device_remove(struct wiphy *wiphy) 22523f2355cbSLuis R. Rodriguez { 22530ad8acafSLuis R. Rodriguez struct wiphy *request_wiphy = NULL; 2254806a9e39SLuis R. Rodriguez 2255761cf7ecSLuis R. Rodriguez assert_cfg80211_lock(); 2256761cf7ecSLuis R. Rodriguez 22570ef9ccddSChris Wright kfree(wiphy->regd); 22580ef9ccddSChris Wright 22590ad8acafSLuis R. Rodriguez if (last_request) 2260806a9e39SLuis R. Rodriguez request_wiphy = wiphy_idx_to_wiphy(last_request->wiphy_idx); 2261806a9e39SLuis R. Rodriguez 22620ef9ccddSChris Wright if (!request_wiphy || request_wiphy != wiphy) 22633f2355cbSLuis R. Rodriguez return; 22640ef9ccddSChris Wright 2265806a9e39SLuis R. Rodriguez last_request->wiphy_idx = WIPHY_IDX_STALE; 22663f2355cbSLuis R. Rodriguez last_request->country_ie_env = ENVIRON_ANY; 22673f2355cbSLuis R. Rodriguez } 22683f2355cbSLuis R. Rodriguez 2269b2e1b302SLuis R. Rodriguez int regulatory_init(void) 2270b2e1b302SLuis R. Rodriguez { 2271bcf4f99bSLuis R. Rodriguez int err = 0; 2272734366deSJohannes Berg 2273b2e1b302SLuis R. Rodriguez reg_pdev = platform_device_register_simple("regulatory", 0, NULL, 0); 2274b2e1b302SLuis R. Rodriguez if (IS_ERR(reg_pdev)) 2275b2e1b302SLuis R. Rodriguez return PTR_ERR(reg_pdev); 2276734366deSJohannes Berg 2277fe33eb39SLuis R. Rodriguez spin_lock_init(®_requests_lock); 2278e38f8a7aSLuis R. Rodriguez spin_lock_init(®_pending_beacons_lock); 2279fe33eb39SLuis R. Rodriguez 2280734366deSJohannes Berg #ifdef CONFIG_WIRELESS_OLD_REGULATORY 2281a3d2eaf0SJohannes Berg cfg80211_regdomain = static_regdom(ieee80211_regdom); 2282734366deSJohannes Berg 2283942b25cfSJohannes Berg printk(KERN_INFO "cfg80211: Using static regulatory domain info\n"); 2284734366deSJohannes Berg print_regdomain_info(cfg80211_regdomain); 2285fb1fc7adSLuis R. Rodriguez /* 2286fb1fc7adSLuis R. Rodriguez * The old code still requests for a new regdomain and if 2287734366deSJohannes Berg * you have CRDA you get it updated, otherwise you get 22882e097dc6SLuis R. Rodriguez * stuck with the static values. Since "EU" is not a valid 22892e097dc6SLuis R. Rodriguez * ISO / IEC 3166 alpha2 code we can't expect userpace to 22902e097dc6SLuis R. Rodriguez * give us a regulatory domain for it. We need last_request 22912e097dc6SLuis R. Rodriguez * iniitalized though so lets just send a request which we 22922e097dc6SLuis R. Rodriguez * know will be ignored... this crap will be removed once 22932e097dc6SLuis R. Rodriguez * OLD_REG dies. 2294fb1fc7adSLuis R. Rodriguez */ 2295ba25c141SLuis R. Rodriguez err = regulatory_hint_core(ieee80211_regdom); 2296734366deSJohannes Berg #else 2297a3d2eaf0SJohannes Berg cfg80211_regdomain = cfg80211_world_regdom; 2298734366deSJohannes Berg 22996ee7d330SLuis R. Rodriguez err = regulatory_hint_core(ieee80211_regdom); 2300734366deSJohannes Berg #endif 2301bcf4f99bSLuis R. Rodriguez if (err) { 2302bcf4f99bSLuis R. Rodriguez if (err == -ENOMEM) 2303bcf4f99bSLuis R. Rodriguez return err; 2304bcf4f99bSLuis R. Rodriguez /* 2305bcf4f99bSLuis R. Rodriguez * N.B. kobject_uevent_env() can fail mainly for when we're out 2306bcf4f99bSLuis R. Rodriguez * memory which is handled and propagated appropriately above 2307bcf4f99bSLuis R. Rodriguez * but it can also fail during a netlink_broadcast() or during 2308bcf4f99bSLuis R. Rodriguez * early boot for call_usermodehelper(). For now treat these 2309bcf4f99bSLuis R. Rodriguez * errors as non-fatal. 2310bcf4f99bSLuis R. Rodriguez */ 2311bcf4f99bSLuis R. Rodriguez printk(KERN_ERR "cfg80211: kobject_uevent_env() was unable " 2312bcf4f99bSLuis R. Rodriguez "to call CRDA during init"); 2313bcf4f99bSLuis R. Rodriguez #ifdef CONFIG_CFG80211_REG_DEBUG 2314bcf4f99bSLuis R. Rodriguez /* We want to find out exactly why when debugging */ 2315bcf4f99bSLuis R. Rodriguez WARN_ON(err); 2316bcf4f99bSLuis R. Rodriguez #endif 2317bcf4f99bSLuis R. Rodriguez } 2318734366deSJohannes Berg 2319b2e1b302SLuis R. Rodriguez return 0; 2320b2e1b302SLuis R. Rodriguez } 2321b2e1b302SLuis R. Rodriguez 2322b2e1b302SLuis R. Rodriguez void regulatory_exit(void) 2323b2e1b302SLuis R. Rodriguez { 2324fe33eb39SLuis R. Rodriguez struct regulatory_request *reg_request, *tmp; 2325e38f8a7aSLuis R. Rodriguez struct reg_beacon *reg_beacon, *btmp; 2326fe33eb39SLuis R. Rodriguez 2327fe33eb39SLuis R. Rodriguez cancel_work_sync(®_work); 2328fe33eb39SLuis R. Rodriguez 2329a1794390SLuis R. Rodriguez mutex_lock(&cfg80211_mutex); 2330734366deSJohannes Berg 2331b2e1b302SLuis R. Rodriguez reset_regdomains(); 2332734366deSJohannes Berg 23333f2355cbSLuis R. Rodriguez kfree(country_ie_regdomain); 23343f2355cbSLuis R. Rodriguez country_ie_regdomain = NULL; 23353f2355cbSLuis R. Rodriguez 2336f6037d09SJohannes Berg kfree(last_request); 2337f6037d09SJohannes Berg 2338b2e1b302SLuis R. Rodriguez platform_device_unregister(reg_pdev); 2339734366deSJohannes Berg 2340e38f8a7aSLuis R. Rodriguez spin_lock_bh(®_pending_beacons_lock); 2341e38f8a7aSLuis R. Rodriguez if (!list_empty(®_pending_beacons)) { 2342e38f8a7aSLuis R. Rodriguez list_for_each_entry_safe(reg_beacon, btmp, 2343e38f8a7aSLuis R. Rodriguez ®_pending_beacons, list) { 2344e38f8a7aSLuis R. Rodriguez list_del(®_beacon->list); 2345e38f8a7aSLuis R. Rodriguez kfree(reg_beacon); 2346e38f8a7aSLuis R. Rodriguez } 2347e38f8a7aSLuis R. Rodriguez } 2348e38f8a7aSLuis R. Rodriguez spin_unlock_bh(®_pending_beacons_lock); 2349e38f8a7aSLuis R. Rodriguez 2350e38f8a7aSLuis R. Rodriguez if (!list_empty(®_beacon_list)) { 2351e38f8a7aSLuis R. Rodriguez list_for_each_entry_safe(reg_beacon, btmp, 2352e38f8a7aSLuis R. Rodriguez ®_beacon_list, list) { 2353e38f8a7aSLuis R. Rodriguez list_del(®_beacon->list); 2354e38f8a7aSLuis R. Rodriguez kfree(reg_beacon); 2355e38f8a7aSLuis R. Rodriguez } 2356e38f8a7aSLuis R. Rodriguez } 2357e38f8a7aSLuis R. Rodriguez 2358fe33eb39SLuis R. Rodriguez spin_lock(®_requests_lock); 2359fe33eb39SLuis R. Rodriguez if (!list_empty(®_requests_list)) { 2360fe33eb39SLuis R. Rodriguez list_for_each_entry_safe(reg_request, tmp, 2361fe33eb39SLuis R. Rodriguez ®_requests_list, list) { 2362fe33eb39SLuis R. Rodriguez list_del(®_request->list); 2363fe33eb39SLuis R. Rodriguez kfree(reg_request); 2364fe33eb39SLuis R. Rodriguez } 2365fe33eb39SLuis R. Rodriguez } 2366fe33eb39SLuis R. Rodriguez spin_unlock(®_requests_lock); 2367fe33eb39SLuis R. Rodriguez 2368a1794390SLuis R. Rodriguez mutex_unlock(&cfg80211_mutex); 23698318d78aSJohannes Berg } 2370