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> 53b77d5ecSLuis R. Rodriguez * Copyright 2008-2011 Luis R. Rodriguez <mcgrof@qca.qualcomm.com> 68318d78aSJohannes Berg * 73b77d5ecSLuis R. Rodriguez * Permission to use, copy, modify, and/or distribute this software for any 83b77d5ecSLuis R. Rodriguez * purpose with or without fee is hereby granted, provided that the above 93b77d5ecSLuis R. Rodriguez * copyright notice and this permission notice appear in all copies. 103b77d5ecSLuis R. Rodriguez * 113b77d5ecSLuis R. Rodriguez * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 123b77d5ecSLuis R. Rodriguez * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 133b77d5ecSLuis R. Rodriguez * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 143b77d5ecSLuis R. Rodriguez * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 153b77d5ecSLuis R. Rodriguez * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 163b77d5ecSLuis R. Rodriguez * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 173b77d5ecSLuis R. Rodriguez * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 188318d78aSJohannes Berg */ 198318d78aSJohannes Berg 203b77d5ecSLuis R. Rodriguez 21b2e1b302SLuis R. Rodriguez /** 22b2e1b302SLuis R. Rodriguez * DOC: Wireless regulatory infrastructure 238318d78aSJohannes Berg * 248318d78aSJohannes Berg * The usual implementation is for a driver to read a device EEPROM to 258318d78aSJohannes Berg * determine which regulatory domain it should be operating under, then 268318d78aSJohannes Berg * looking up the allowable channels in a driver-local table and finally 278318d78aSJohannes Berg * registering those channels in the wiphy structure. 288318d78aSJohannes Berg * 29b2e1b302SLuis R. Rodriguez * Another set of compliance enforcement is for drivers to use their 30b2e1b302SLuis R. Rodriguez * own compliance limits which can be stored on the EEPROM. The host 31b2e1b302SLuis R. Rodriguez * driver or firmware may ensure these are used. 32b2e1b302SLuis R. Rodriguez * 33b2e1b302SLuis R. Rodriguez * In addition to all this we provide an extra layer of regulatory 34b2e1b302SLuis R. Rodriguez * conformance. For drivers which do not have any regulatory 35b2e1b302SLuis R. Rodriguez * information CRDA provides the complete regulatory solution. 36b2e1b302SLuis R. Rodriguez * For others it provides a community effort on further restrictions 37b2e1b302SLuis R. Rodriguez * to enhance compliance. 38b2e1b302SLuis R. Rodriguez * 39b2e1b302SLuis R. Rodriguez * Note: When number of rules --> infinity we will not be able to 40b2e1b302SLuis R. Rodriguez * index on alpha2 any more, instead we'll probably have to 41b2e1b302SLuis R. Rodriguez * rely on some SHA1 checksum of the regdomain for example. 42b2e1b302SLuis R. Rodriguez * 438318d78aSJohannes Berg */ 44e9c0268fSJoe Perches 45e9c0268fSJoe Perches #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 46e9c0268fSJoe Perches 478318d78aSJohannes Berg #include <linux/kernel.h> 48bc3b2d7fSPaul Gortmaker #include <linux/export.h> 495a0e3ad6STejun Heo #include <linux/slab.h> 50b2e1b302SLuis R. Rodriguez #include <linux/list.h> 51c61029c7SJohn W. Linville #include <linux/ctype.h> 52b2e1b302SLuis R. Rodriguez #include <linux/nl80211.h> 53b2e1b302SLuis R. Rodriguez #include <linux/platform_device.h> 54d9b93842SPaul Gortmaker #include <linux/moduleparam.h> 55b2e1b302SLuis R. Rodriguez #include <net/cfg80211.h> 568318d78aSJohannes Berg #include "core.h" 57b2e1b302SLuis R. Rodriguez #include "reg.h" 583b377ea9SJohn W. Linville #include "regdb.h" 5973d54c9eSLuis R. Rodriguez #include "nl80211.h" 608318d78aSJohannes Berg 614113f751SLuis R. Rodriguez #ifdef CONFIG_CFG80211_REG_DEBUG 628271195eSJohn W. Linville #define REG_DBG_PRINT(format, args...) \ 6312c5ffb5SJoe Perches printk(KERN_DEBUG pr_fmt(format), ##args) 644113f751SLuis R. Rodriguez #else 658271195eSJohn W. Linville #define REG_DBG_PRINT(args...) 664113f751SLuis R. Rodriguez #endif 674113f751SLuis R. Rodriguez 682f92212bSJohannes Berg enum reg_request_treatment { 692f92212bSJohannes Berg REG_REQ_OK, 702f92212bSJohannes Berg REG_REQ_IGNORE, 712f92212bSJohannes Berg REG_REQ_INTERSECT, 722f92212bSJohannes Berg REG_REQ_ALREADY_SET, 732f92212bSJohannes Berg }; 742f92212bSJohannes Berg 75a042994dSLuis R. Rodriguez static struct regulatory_request core_request_world = { 76a042994dSLuis R. Rodriguez .initiator = NL80211_REGDOM_SET_BY_CORE, 77a042994dSLuis R. Rodriguez .alpha2[0] = '0', 78a042994dSLuis R. Rodriguez .alpha2[1] = '0', 79a042994dSLuis R. Rodriguez .intersect = false, 80a042994dSLuis R. Rodriguez .processed = true, 81a042994dSLuis R. Rodriguez .country_ie_env = ENVIRON_ANY, 82a042994dSLuis R. Rodriguez }; 83a042994dSLuis R. Rodriguez 8438fd2143SJohannes Berg /* 8538fd2143SJohannes Berg * Receipt of information from last regulatory request, 8638fd2143SJohannes Berg * protected by RTNL (and can be accessed with RCU protection) 8738fd2143SJohannes Berg */ 88c492db37SJohannes Berg static struct regulatory_request __rcu *last_request = 89c492db37SJohannes Berg (void __rcu *)&core_request_world; 90734366deSJohannes Berg 91b2e1b302SLuis R. Rodriguez /* To trigger userspace events */ 92b2e1b302SLuis R. Rodriguez static struct platform_device *reg_pdev; 938318d78aSJohannes Berg 944d9d88d1SScott James Remnant static struct device_type reg_device_type = { 954d9d88d1SScott James Remnant .uevent = reg_device_uevent, 964d9d88d1SScott James Remnant }; 974d9d88d1SScott James Remnant 98fb1fc7adSLuis R. Rodriguez /* 99fb1fc7adSLuis R. Rodriguez * Central wireless core regulatory domains, we only need two, 100734366deSJohannes Berg * the current one and a world regulatory domain in case we have no 101e8da2bb4SJohannes Berg * information to give us an alpha2. 10238fd2143SJohannes Berg * (protected by RTNL, can be read under RCU) 103fb1fc7adSLuis R. Rodriguez */ 104458f4f9eSJohannes Berg const struct ieee80211_regdomain __rcu *cfg80211_regdomain; 105734366deSJohannes Berg 106fb1fc7adSLuis R. Rodriguez /* 10757b5ce07SLuis R. Rodriguez * Number of devices that registered to the core 10857b5ce07SLuis R. Rodriguez * that support cellular base station regulatory hints 10938fd2143SJohannes Berg * (protected by RTNL) 11057b5ce07SLuis R. Rodriguez */ 11157b5ce07SLuis R. Rodriguez static int reg_num_devs_support_basehint; 11257b5ce07SLuis R. Rodriguez 113458f4f9eSJohannes Berg static const struct ieee80211_regdomain *get_cfg80211_regdom(void) 114458f4f9eSJohannes Berg { 11538fd2143SJohannes Berg return rtnl_dereference(cfg80211_regdomain); 116458f4f9eSJohannes Berg } 117458f4f9eSJohannes Berg 118458f4f9eSJohannes Berg static const struct ieee80211_regdomain *get_wiphy_regdom(struct wiphy *wiphy) 119458f4f9eSJohannes Berg { 12038fd2143SJohannes Berg return rtnl_dereference(wiphy->regd); 121458f4f9eSJohannes Berg } 122458f4f9eSJohannes Berg 123458f4f9eSJohannes Berg static void rcu_free_regdom(const struct ieee80211_regdomain *r) 124458f4f9eSJohannes Berg { 125458f4f9eSJohannes Berg if (!r) 126458f4f9eSJohannes Berg return; 127458f4f9eSJohannes Berg kfree_rcu((struct ieee80211_regdomain *)r, rcu_head); 128458f4f9eSJohannes Berg } 129458f4f9eSJohannes Berg 130c492db37SJohannes Berg static struct regulatory_request *get_last_request(void) 131c492db37SJohannes Berg { 13238fd2143SJohannes Berg return rcu_dereference_rtnl(last_request); 133c492db37SJohannes Berg } 134c492db37SJohannes Berg 135e38f8a7aSLuis R. Rodriguez /* Used to queue up regulatory hints */ 136fe33eb39SLuis R. Rodriguez static LIST_HEAD(reg_requests_list); 137fe33eb39SLuis R. Rodriguez static spinlock_t reg_requests_lock; 138fe33eb39SLuis R. Rodriguez 139e38f8a7aSLuis R. Rodriguez /* Used to queue up beacon hints for review */ 140e38f8a7aSLuis R. Rodriguez static LIST_HEAD(reg_pending_beacons); 141e38f8a7aSLuis R. Rodriguez static spinlock_t reg_pending_beacons_lock; 142e38f8a7aSLuis R. Rodriguez 143e38f8a7aSLuis R. Rodriguez /* Used to keep track of processed beacon hints */ 144e38f8a7aSLuis R. Rodriguez static LIST_HEAD(reg_beacon_list); 145e38f8a7aSLuis R. Rodriguez 146e38f8a7aSLuis R. Rodriguez struct reg_beacon { 147e38f8a7aSLuis R. Rodriguez struct list_head list; 148e38f8a7aSLuis R. Rodriguez struct ieee80211_channel chan; 149e38f8a7aSLuis R. Rodriguez }; 150e38f8a7aSLuis R. Rodriguez 151f333a7a2SLuis R. Rodriguez static void reg_todo(struct work_struct *work); 152f333a7a2SLuis R. Rodriguez static DECLARE_WORK(reg_work, reg_todo); 153f333a7a2SLuis R. Rodriguez 154a90c7a31SLuis R. Rodriguez static void reg_timeout_work(struct work_struct *work); 155a90c7a31SLuis R. Rodriguez static DECLARE_DELAYED_WORK(reg_timeout, reg_timeout_work); 156a90c7a31SLuis R. Rodriguez 157734366deSJohannes Berg /* We keep a static world regulatory domain in case of the absence of CRDA */ 158734366deSJohannes Berg static const struct ieee80211_regdomain world_regdom = { 15990cdc6dfSVladimir Kondratiev .n_reg_rules = 6, 160734366deSJohannes Berg .alpha2 = "00", 161734366deSJohannes Berg .reg_rules = { 16268798a62SLuis R. Rodriguez /* IEEE 802.11b/g, channels 1..11 */ 16368798a62SLuis R. Rodriguez REG_RULE(2412-10, 2462+10, 40, 6, 20, 0), 16443c771a1SJohannes Berg /* IEEE 802.11b/g, channels 12..13. */ 16543c771a1SJohannes Berg REG_RULE(2467-10, 2472+10, 40, 6, 20, 166611b6a82SLuis R. Rodriguez NL80211_RRF_PASSIVE_SCAN | 167611b6a82SLuis R. Rodriguez NL80211_RRF_NO_IBSS), 168611b6a82SLuis R. Rodriguez /* IEEE 802.11 channel 14 - Only JP enables 169611b6a82SLuis R. Rodriguez * this and for 802.11b only */ 170611b6a82SLuis R. Rodriguez REG_RULE(2484-10, 2484+10, 20, 6, 20, 171611b6a82SLuis R. Rodriguez NL80211_RRF_PASSIVE_SCAN | 172611b6a82SLuis R. Rodriguez NL80211_RRF_NO_IBSS | 173611b6a82SLuis R. Rodriguez NL80211_RRF_NO_OFDM), 1743fc71f77SLuis R. Rodriguez /* IEEE 802.11a, channel 36..48 */ 175131a19bcSJohannes Berg REG_RULE(5180-10, 5240+10, 160, 6, 20, 1763fc71f77SLuis R. Rodriguez NL80211_RRF_PASSIVE_SCAN | 1773fc71f77SLuis R. Rodriguez NL80211_RRF_NO_IBSS), 1783fc71f77SLuis R. Rodriguez 179131a19bcSJohannes Berg /* IEEE 802.11a, channel 52..64 - DFS required */ 180131a19bcSJohannes Berg REG_RULE(5260-10, 5320+10, 160, 6, 20, 181131a19bcSJohannes Berg NL80211_RRF_PASSIVE_SCAN | 182131a19bcSJohannes Berg NL80211_RRF_NO_IBSS | 183131a19bcSJohannes Berg NL80211_RRF_DFS), 184131a19bcSJohannes Berg 185131a19bcSJohannes Berg /* IEEE 802.11a, channel 100..144 - DFS required */ 186131a19bcSJohannes Berg REG_RULE(5500-10, 5720+10, 160, 6, 20, 187131a19bcSJohannes Berg NL80211_RRF_PASSIVE_SCAN | 188131a19bcSJohannes Berg NL80211_RRF_NO_IBSS | 189131a19bcSJohannes Berg NL80211_RRF_DFS), 1903fc71f77SLuis R. Rodriguez 1913fc71f77SLuis R. Rodriguez /* IEEE 802.11a, channel 149..165 */ 1928ab9d85cSJohannes Berg REG_RULE(5745-10, 5825+10, 80, 6, 20, 1933fc71f77SLuis R. Rodriguez NL80211_RRF_PASSIVE_SCAN | 1943fc71f77SLuis R. Rodriguez NL80211_RRF_NO_IBSS), 19590cdc6dfSVladimir Kondratiev 19690cdc6dfSVladimir Kondratiev /* IEEE 802.11ad (60gHz), channels 1..3 */ 19790cdc6dfSVladimir Kondratiev REG_RULE(56160+2160*1-1080, 56160+2160*3+1080, 2160, 0, 0, 0), 198734366deSJohannes Berg } 199734366deSJohannes Berg }; 200734366deSJohannes Berg 20138fd2143SJohannes Berg /* protected by RTNL */ 202a3d2eaf0SJohannes Berg static const struct ieee80211_regdomain *cfg80211_world_regdom = 203a3d2eaf0SJohannes Berg &world_regdom; 204734366deSJohannes Berg 2056ee7d330SLuis R. Rodriguez static char *ieee80211_regdom = "00"; 20609d989d1SLuis R. Rodriguez static char user_alpha2[2]; 2076ee7d330SLuis R. Rodriguez 208734366deSJohannes Berg module_param(ieee80211_regdom, charp, 0444); 209734366deSJohannes Berg MODULE_PARM_DESC(ieee80211_regdom, "IEEE 802.11 regulatory domain code"); 210734366deSJohannes Berg 211379b82f4SJohannes Berg static void reset_regdomains(bool full_reset, 212379b82f4SJohannes Berg const struct ieee80211_regdomain *new_regdom) 213734366deSJohannes Berg { 214458f4f9eSJohannes Berg const struct ieee80211_regdomain *r; 215c492db37SJohannes Berg struct regulatory_request *lr; 216458f4f9eSJohannes Berg 21738fd2143SJohannes Berg ASSERT_RTNL(); 218e8da2bb4SJohannes Berg 219458f4f9eSJohannes Berg r = get_cfg80211_regdom(); 220458f4f9eSJohannes Berg 221942b25cfSJohannes Berg /* avoid freeing static information or freeing something twice */ 222458f4f9eSJohannes Berg if (r == cfg80211_world_regdom) 223458f4f9eSJohannes Berg r = NULL; 224942b25cfSJohannes Berg if (cfg80211_world_regdom == &world_regdom) 225942b25cfSJohannes Berg cfg80211_world_regdom = NULL; 226458f4f9eSJohannes Berg if (r == &world_regdom) 227458f4f9eSJohannes Berg r = NULL; 228942b25cfSJohannes Berg 229458f4f9eSJohannes Berg rcu_free_regdom(r); 230458f4f9eSJohannes Berg rcu_free_regdom(cfg80211_world_regdom); 231734366deSJohannes Berg 232a3d2eaf0SJohannes Berg cfg80211_world_regdom = &world_regdom; 233458f4f9eSJohannes Berg rcu_assign_pointer(cfg80211_regdomain, new_regdom); 234a042994dSLuis R. Rodriguez 235a042994dSLuis R. Rodriguez if (!full_reset) 236a042994dSLuis R. Rodriguez return; 237a042994dSLuis R. Rodriguez 238c492db37SJohannes Berg lr = get_last_request(); 239c492db37SJohannes Berg if (lr != &core_request_world && lr) 240c492db37SJohannes Berg kfree_rcu(lr, rcu_head); 241c492db37SJohannes Berg rcu_assign_pointer(last_request, &core_request_world); 242734366deSJohannes Berg } 243734366deSJohannes Berg 244fb1fc7adSLuis R. Rodriguez /* 245fb1fc7adSLuis R. Rodriguez * Dynamic world regulatory domain requested by the wireless 246fb1fc7adSLuis R. Rodriguez * core upon initialization 247fb1fc7adSLuis R. Rodriguez */ 248a3d2eaf0SJohannes Berg static void update_world_regdomain(const struct ieee80211_regdomain *rd) 249734366deSJohannes Berg { 250c492db37SJohannes Berg struct regulatory_request *lr; 251734366deSJohannes Berg 252c492db37SJohannes Berg lr = get_last_request(); 253c492db37SJohannes Berg 254c492db37SJohannes Berg WARN_ON(!lr); 255e8da2bb4SJohannes Berg 256379b82f4SJohannes Berg reset_regdomains(false, rd); 257734366deSJohannes Berg 258734366deSJohannes Berg cfg80211_world_regdom = rd; 259734366deSJohannes Berg } 260734366deSJohannes Berg 261a3d2eaf0SJohannes Berg bool is_world_regdom(const char *alpha2) 262b2e1b302SLuis R. Rodriguez { 263b2e1b302SLuis R. Rodriguez if (!alpha2) 264b2e1b302SLuis R. Rodriguez return false; 2651a919318SJohannes Berg return alpha2[0] == '0' && alpha2[1] == '0'; 266b2e1b302SLuis R. Rodriguez } 267b2e1b302SLuis R. Rodriguez 268a3d2eaf0SJohannes Berg static bool is_alpha2_set(const char *alpha2) 269b2e1b302SLuis R. Rodriguez { 270b2e1b302SLuis R. Rodriguez if (!alpha2) 271b2e1b302SLuis R. Rodriguez return false; 2721a919318SJohannes Berg return alpha2[0] && alpha2[1]; 273b2e1b302SLuis R. Rodriguez } 274b2e1b302SLuis R. Rodriguez 275a3d2eaf0SJohannes Berg static bool is_unknown_alpha2(const char *alpha2) 276b2e1b302SLuis R. Rodriguez { 277b2e1b302SLuis R. Rodriguez if (!alpha2) 278b2e1b302SLuis R. Rodriguez return false; 279fb1fc7adSLuis R. Rodriguez /* 280fb1fc7adSLuis R. Rodriguez * Special case where regulatory domain was built by driver 281fb1fc7adSLuis R. Rodriguez * but a specific alpha2 cannot be determined 282fb1fc7adSLuis R. Rodriguez */ 2831a919318SJohannes Berg return alpha2[0] == '9' && alpha2[1] == '9'; 284b2e1b302SLuis R. Rodriguez } 285b2e1b302SLuis R. Rodriguez 2863f2355cbSLuis R. Rodriguez static bool is_intersected_alpha2(const char *alpha2) 2873f2355cbSLuis R. Rodriguez { 2883f2355cbSLuis R. Rodriguez if (!alpha2) 2893f2355cbSLuis R. Rodriguez return false; 290fb1fc7adSLuis R. Rodriguez /* 291fb1fc7adSLuis R. Rodriguez * Special case where regulatory domain is the 2923f2355cbSLuis R. Rodriguez * result of an intersection between two regulatory domain 293fb1fc7adSLuis R. Rodriguez * structures 294fb1fc7adSLuis R. Rodriguez */ 2951a919318SJohannes Berg return alpha2[0] == '9' && alpha2[1] == '8'; 2963f2355cbSLuis R. Rodriguez } 2973f2355cbSLuis R. Rodriguez 298a3d2eaf0SJohannes Berg static bool is_an_alpha2(const char *alpha2) 299b2e1b302SLuis R. Rodriguez { 300b2e1b302SLuis R. Rodriguez if (!alpha2) 301b2e1b302SLuis R. Rodriguez return false; 3021a919318SJohannes Berg return isalpha(alpha2[0]) && isalpha(alpha2[1]); 303b2e1b302SLuis R. Rodriguez } 304b2e1b302SLuis R. Rodriguez 305a3d2eaf0SJohannes Berg static bool alpha2_equal(const char *alpha2_x, const char *alpha2_y) 306b2e1b302SLuis R. Rodriguez { 307b2e1b302SLuis R. Rodriguez if (!alpha2_x || !alpha2_y) 308b2e1b302SLuis R. Rodriguez return false; 3091a919318SJohannes Berg return alpha2_x[0] == alpha2_y[0] && alpha2_x[1] == alpha2_y[1]; 310b2e1b302SLuis R. Rodriguez } 311b2e1b302SLuis R. Rodriguez 31269b1572bSLuis R. Rodriguez static bool regdom_changes(const char *alpha2) 313b2e1b302SLuis R. Rodriguez { 314458f4f9eSJohannes Berg const struct ieee80211_regdomain *r = get_cfg80211_regdom(); 315761cf7ecSLuis R. Rodriguez 316458f4f9eSJohannes Berg if (!r) 317b2e1b302SLuis R. Rodriguez return true; 318458f4f9eSJohannes Berg return !alpha2_equal(r->alpha2, alpha2); 319b2e1b302SLuis R. Rodriguez } 320b2e1b302SLuis R. Rodriguez 32109d989d1SLuis R. Rodriguez /* 32209d989d1SLuis R. Rodriguez * The NL80211_REGDOM_SET_BY_USER regdom alpha2 is cached, this lets 32309d989d1SLuis R. Rodriguez * you know if a valid regulatory hint with NL80211_REGDOM_SET_BY_USER 32409d989d1SLuis R. Rodriguez * has ever been issued. 32509d989d1SLuis R. Rodriguez */ 32609d989d1SLuis R. Rodriguez static bool is_user_regdom_saved(void) 32709d989d1SLuis R. Rodriguez { 32809d989d1SLuis R. Rodriguez if (user_alpha2[0] == '9' && user_alpha2[1] == '7') 32909d989d1SLuis R. Rodriguez return false; 33009d989d1SLuis R. Rodriguez 33109d989d1SLuis R. Rodriguez /* This would indicate a mistake on the design */ 3321a919318SJohannes Berg if (WARN(!is_world_regdom(user_alpha2) && !is_an_alpha2(user_alpha2), 33309d989d1SLuis R. Rodriguez "Unexpected user alpha2: %c%c\n", 3341a919318SJohannes Berg user_alpha2[0], user_alpha2[1])) 33509d989d1SLuis R. Rodriguez return false; 33609d989d1SLuis R. Rodriguez 33709d989d1SLuis R. Rodriguez return true; 33809d989d1SLuis R. Rodriguez } 33909d989d1SLuis R. Rodriguez 340e9763c3cSJohannes Berg static const struct ieee80211_regdomain * 341e9763c3cSJohannes Berg reg_copy_regd(const struct ieee80211_regdomain *src_regd) 3423b377ea9SJohn W. Linville { 3433b377ea9SJohn W. Linville struct ieee80211_regdomain *regd; 344e9763c3cSJohannes Berg int size_of_regd; 3453b377ea9SJohn W. Linville unsigned int i; 3463b377ea9SJohn W. Linville 34782f20856SJohannes Berg size_of_regd = 34882f20856SJohannes Berg sizeof(struct ieee80211_regdomain) + 34982f20856SJohannes Berg src_regd->n_reg_rules * sizeof(struct ieee80211_reg_rule); 3503b377ea9SJohn W. Linville 3513b377ea9SJohn W. Linville regd = kzalloc(size_of_regd, GFP_KERNEL); 3523b377ea9SJohn W. Linville if (!regd) 353e9763c3cSJohannes Berg return ERR_PTR(-ENOMEM); 3543b377ea9SJohn W. Linville 3553b377ea9SJohn W. Linville memcpy(regd, src_regd, sizeof(struct ieee80211_regdomain)); 3563b377ea9SJohn W. Linville 3573b377ea9SJohn W. Linville for (i = 0; i < src_regd->n_reg_rules; i++) 3583b377ea9SJohn W. Linville memcpy(®d->reg_rules[i], &src_regd->reg_rules[i], 3593b377ea9SJohn W. Linville sizeof(struct ieee80211_reg_rule)); 3603b377ea9SJohn W. Linville 361e9763c3cSJohannes Berg return regd; 3623b377ea9SJohn W. Linville } 3633b377ea9SJohn W. Linville 3643b377ea9SJohn W. Linville #ifdef CONFIG_CFG80211_INTERNAL_REGDB 3653b377ea9SJohn W. Linville struct reg_regdb_search_request { 3663b377ea9SJohn W. Linville char alpha2[2]; 3673b377ea9SJohn W. Linville struct list_head list; 3683b377ea9SJohn W. Linville }; 3693b377ea9SJohn W. Linville 3703b377ea9SJohn W. Linville static LIST_HEAD(reg_regdb_search_list); 371368d06f5SJohn W. Linville static DEFINE_MUTEX(reg_regdb_search_mutex); 3723b377ea9SJohn W. Linville 3733b377ea9SJohn W. Linville static void reg_regdb_search(struct work_struct *work) 3743b377ea9SJohn W. Linville { 3753b377ea9SJohn W. Linville struct reg_regdb_search_request *request; 376e9763c3cSJohannes Berg const struct ieee80211_regdomain *curdom, *regdom = NULL; 377e9763c3cSJohannes Berg int i; 378a85d0d7fSLuis R. Rodriguez 3795fe231e8SJohannes Berg rtnl_lock(); 3803b377ea9SJohn W. Linville 381368d06f5SJohn W. Linville mutex_lock(®_regdb_search_mutex); 3823b377ea9SJohn W. Linville while (!list_empty(®_regdb_search_list)) { 3833b377ea9SJohn W. Linville request = list_first_entry(®_regdb_search_list, 3843b377ea9SJohn W. Linville struct reg_regdb_search_request, 3853b377ea9SJohn W. Linville list); 3863b377ea9SJohn W. Linville list_del(&request->list); 3873b377ea9SJohn W. Linville 3883b377ea9SJohn W. Linville for (i = 0; i < reg_regdb_size; i++) { 3893b377ea9SJohn W. Linville curdom = reg_regdb[i]; 3903b377ea9SJohn W. Linville 3911a919318SJohannes Berg if (alpha2_equal(request->alpha2, curdom->alpha2)) { 392e9763c3cSJohannes Berg regdom = reg_copy_regd(curdom); 3933b377ea9SJohn W. Linville break; 3943b377ea9SJohn W. Linville } 3953b377ea9SJohn W. Linville } 3963b377ea9SJohn W. Linville 3973b377ea9SJohn W. Linville kfree(request); 3983b377ea9SJohn W. Linville } 399368d06f5SJohn W. Linville mutex_unlock(®_regdb_search_mutex); 400a85d0d7fSLuis R. Rodriguez 401e9763c3cSJohannes Berg if (!IS_ERR_OR_NULL(regdom)) 402a85d0d7fSLuis R. Rodriguez set_regdom(regdom); 403a85d0d7fSLuis R. Rodriguez 4045fe231e8SJohannes Berg rtnl_unlock(); 4053b377ea9SJohn W. Linville } 4063b377ea9SJohn W. Linville 4073b377ea9SJohn W. Linville static DECLARE_WORK(reg_regdb_work, reg_regdb_search); 4083b377ea9SJohn W. Linville 4093b377ea9SJohn W. Linville static void reg_regdb_query(const char *alpha2) 4103b377ea9SJohn W. Linville { 4113b377ea9SJohn W. Linville struct reg_regdb_search_request *request; 4123b377ea9SJohn W. Linville 4133b377ea9SJohn W. Linville if (!alpha2) 4143b377ea9SJohn W. Linville return; 4153b377ea9SJohn W. Linville 4163b377ea9SJohn W. Linville request = kzalloc(sizeof(struct reg_regdb_search_request), GFP_KERNEL); 4173b377ea9SJohn W. Linville if (!request) 4183b377ea9SJohn W. Linville return; 4193b377ea9SJohn W. Linville 4203b377ea9SJohn W. Linville memcpy(request->alpha2, alpha2, 2); 4213b377ea9SJohn W. Linville 422368d06f5SJohn W. Linville mutex_lock(®_regdb_search_mutex); 4233b377ea9SJohn W. Linville list_add_tail(&request->list, ®_regdb_search_list); 424368d06f5SJohn W. Linville mutex_unlock(®_regdb_search_mutex); 4253b377ea9SJohn W. Linville 4263b377ea9SJohn W. Linville schedule_work(®_regdb_work); 4273b377ea9SJohn W. Linville } 42880007efeSLuis R. Rodriguez 42980007efeSLuis R. Rodriguez /* Feel free to add any other sanity checks here */ 43080007efeSLuis R. Rodriguez static void reg_regdb_size_check(void) 43180007efeSLuis R. Rodriguez { 43280007efeSLuis R. Rodriguez /* We should ideally BUILD_BUG_ON() but then random builds would fail */ 43380007efeSLuis R. Rodriguez WARN_ONCE(!reg_regdb_size, "db.txt is empty, you should update it..."); 43480007efeSLuis R. Rodriguez } 4353b377ea9SJohn W. Linville #else 43680007efeSLuis R. Rodriguez static inline void reg_regdb_size_check(void) {} 4373b377ea9SJohn W. Linville static inline void reg_regdb_query(const char *alpha2) {} 4383b377ea9SJohn W. Linville #endif /* CONFIG_CFG80211_INTERNAL_REGDB */ 4393b377ea9SJohn W. Linville 440fb1fc7adSLuis R. Rodriguez /* 441fb1fc7adSLuis R. Rodriguez * This lets us keep regulatory code which is updated on a regulatory 4424d9d88d1SScott James Remnant * basis in userspace. Country information is filled in by 4434d9d88d1SScott James Remnant * reg_device_uevent 444fb1fc7adSLuis R. Rodriguez */ 445b2e1b302SLuis R. Rodriguez static int call_crda(const char *alpha2) 446b2e1b302SLuis R. Rodriguez { 447b2e1b302SLuis R. Rodriguez if (!is_world_regdom((char *) alpha2)) 448e9c0268fSJoe Perches pr_info("Calling CRDA for country: %c%c\n", 449b2e1b302SLuis R. Rodriguez alpha2[0], alpha2[1]); 450b2e1b302SLuis R. Rodriguez else 451e9c0268fSJoe Perches pr_info("Calling CRDA to update world regulatory domain\n"); 4528318d78aSJohannes Berg 4533b377ea9SJohn W. Linville /* query internal regulatory database (if it exists) */ 4543b377ea9SJohn W. Linville reg_regdb_query(alpha2); 4553b377ea9SJohn W. Linville 4564d9d88d1SScott James Remnant return kobject_uevent(®_pdev->dev.kobj, KOBJ_CHANGE); 457b2e1b302SLuis R. Rodriguez } 458b2e1b302SLuis R. Rodriguez 4596913b49aSJohannes Berg static bool reg_is_valid_request(const char *alpha2) 460b2e1b302SLuis R. Rodriguez { 461c492db37SJohannes Berg struct regulatory_request *lr = get_last_request(); 46261405e97SLuis R. Rodriguez 463c492db37SJohannes Berg if (!lr || lr->processed) 464f6037d09SJohannes Berg return false; 465f6037d09SJohannes Berg 466c492db37SJohannes Berg return alpha2_equal(lr->alpha2, alpha2); 467b2e1b302SLuis R. Rodriguez } 468b2e1b302SLuis R. Rodriguez 469b2e1b302SLuis R. Rodriguez /* Sanity check on a regulatory rule */ 470a3d2eaf0SJohannes Berg static bool is_valid_reg_rule(const struct ieee80211_reg_rule *rule) 471b2e1b302SLuis R. Rodriguez { 472a3d2eaf0SJohannes Berg const struct ieee80211_freq_range *freq_range = &rule->freq_range; 473b2e1b302SLuis R. Rodriguez u32 freq_diff; 474b2e1b302SLuis R. Rodriguez 47591e99004SLuis R. Rodriguez if (freq_range->start_freq_khz <= 0 || freq_range->end_freq_khz <= 0) 476b2e1b302SLuis R. Rodriguez return false; 477b2e1b302SLuis R. Rodriguez 478b2e1b302SLuis R. Rodriguez if (freq_range->start_freq_khz > freq_range->end_freq_khz) 479b2e1b302SLuis R. Rodriguez return false; 480b2e1b302SLuis R. Rodriguez 481b2e1b302SLuis R. Rodriguez freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz; 482b2e1b302SLuis R. Rodriguez 483bd05f28eSRoel Kluin if (freq_range->end_freq_khz <= freq_range->start_freq_khz || 484bd05f28eSRoel Kluin freq_range->max_bandwidth_khz > freq_diff) 485b2e1b302SLuis R. Rodriguez return false; 486b2e1b302SLuis R. Rodriguez 487b2e1b302SLuis R. Rodriguez return true; 488b2e1b302SLuis R. Rodriguez } 489b2e1b302SLuis R. Rodriguez 490a3d2eaf0SJohannes Berg static bool is_valid_rd(const struct ieee80211_regdomain *rd) 491b2e1b302SLuis R. Rodriguez { 492a3d2eaf0SJohannes Berg const struct ieee80211_reg_rule *reg_rule = NULL; 493b2e1b302SLuis R. Rodriguez unsigned int i; 494b2e1b302SLuis R. Rodriguez 495b2e1b302SLuis R. Rodriguez if (!rd->n_reg_rules) 496b2e1b302SLuis R. Rodriguez return false; 497b2e1b302SLuis R. Rodriguez 49888dc1c3fSLuis R. Rodriguez if (WARN_ON(rd->n_reg_rules > NL80211_MAX_SUPP_REG_RULES)) 49988dc1c3fSLuis R. Rodriguez return false; 50088dc1c3fSLuis R. Rodriguez 501b2e1b302SLuis R. Rodriguez for (i = 0; i < rd->n_reg_rules; i++) { 502b2e1b302SLuis R. Rodriguez reg_rule = &rd->reg_rules[i]; 503b2e1b302SLuis R. Rodriguez if (!is_valid_reg_rule(reg_rule)) 504b2e1b302SLuis R. Rodriguez return false; 505b2e1b302SLuis R. Rodriguez } 506b2e1b302SLuis R. Rodriguez 507b2e1b302SLuis R. Rodriguez return true; 508b2e1b302SLuis R. Rodriguez } 509b2e1b302SLuis R. Rodriguez 510038659e7SLuis R. Rodriguez static bool reg_does_bw_fit(const struct ieee80211_freq_range *freq_range, 511fe7ef5e9SJohannes Berg u32 center_freq_khz, u32 bw_khz) 512b2e1b302SLuis R. Rodriguez { 513038659e7SLuis R. Rodriguez u32 start_freq_khz, end_freq_khz; 514038659e7SLuis R. Rodriguez 515038659e7SLuis R. Rodriguez start_freq_khz = center_freq_khz - (bw_khz/2); 516038659e7SLuis R. Rodriguez end_freq_khz = center_freq_khz + (bw_khz/2); 517038659e7SLuis R. Rodriguez 518b2e1b302SLuis R. Rodriguez if (start_freq_khz >= freq_range->start_freq_khz && 519b2e1b302SLuis R. Rodriguez end_freq_khz <= freq_range->end_freq_khz) 520038659e7SLuis R. Rodriguez return true; 521038659e7SLuis R. Rodriguez 522038659e7SLuis R. Rodriguez return false; 523b2e1b302SLuis R. Rodriguez } 524b2e1b302SLuis R. Rodriguez 5250c7dc45dSLuis R. Rodriguez /** 5260c7dc45dSLuis R. Rodriguez * freq_in_rule_band - tells us if a frequency is in a frequency band 5270c7dc45dSLuis R. Rodriguez * @freq_range: frequency rule we want to query 5280c7dc45dSLuis R. Rodriguez * @freq_khz: frequency we are inquiring about 5290c7dc45dSLuis R. Rodriguez * 5300c7dc45dSLuis R. Rodriguez * This lets us know if a specific frequency rule is or is not relevant to 5310c7dc45dSLuis R. Rodriguez * a specific frequency's band. Bands are device specific and artificial 53264629b9dSVladimir Kondratiev * definitions (the "2.4 GHz band", the "5 GHz band" and the "60GHz band"), 53364629b9dSVladimir Kondratiev * however it is safe for now to assume that a frequency rule should not be 53464629b9dSVladimir Kondratiev * part of a frequency's band if the start freq or end freq are off by more 53564629b9dSVladimir Kondratiev * than 2 GHz for the 2.4 and 5 GHz bands, and by more than 10 GHz for the 53664629b9dSVladimir Kondratiev * 60 GHz band. 5370c7dc45dSLuis R. Rodriguez * This resolution can be lowered and should be considered as we add 5380c7dc45dSLuis R. Rodriguez * regulatory rule support for other "bands". 5390c7dc45dSLuis R. Rodriguez **/ 5400c7dc45dSLuis R. Rodriguez static bool freq_in_rule_band(const struct ieee80211_freq_range *freq_range, 5410c7dc45dSLuis R. Rodriguez u32 freq_khz) 5420c7dc45dSLuis R. Rodriguez { 5430c7dc45dSLuis R. Rodriguez #define ONE_GHZ_IN_KHZ 1000000 54464629b9dSVladimir Kondratiev /* 54564629b9dSVladimir Kondratiev * From 802.11ad: directional multi-gigabit (DMG): 54664629b9dSVladimir Kondratiev * Pertaining to operation in a frequency band containing a channel 54764629b9dSVladimir Kondratiev * with the Channel starting frequency above 45 GHz. 54864629b9dSVladimir Kondratiev */ 54964629b9dSVladimir Kondratiev u32 limit = freq_khz > 45 * ONE_GHZ_IN_KHZ ? 55064629b9dSVladimir Kondratiev 10 * ONE_GHZ_IN_KHZ : 2 * ONE_GHZ_IN_KHZ; 55164629b9dSVladimir Kondratiev if (abs(freq_khz - freq_range->start_freq_khz) <= limit) 5520c7dc45dSLuis R. Rodriguez return true; 55364629b9dSVladimir Kondratiev if (abs(freq_khz - freq_range->end_freq_khz) <= limit) 5540c7dc45dSLuis R. Rodriguez return true; 5550c7dc45dSLuis R. Rodriguez return false; 5560c7dc45dSLuis R. Rodriguez #undef ONE_GHZ_IN_KHZ 5570c7dc45dSLuis R. Rodriguez } 5580c7dc45dSLuis R. Rodriguez 559fb1fc7adSLuis R. Rodriguez /* 560fb1fc7adSLuis R. Rodriguez * Helper for regdom_intersect(), this does the real 561fb1fc7adSLuis R. Rodriguez * mathematical intersection fun 562fb1fc7adSLuis R. Rodriguez */ 5631a919318SJohannes Berg static int reg_rules_intersect(const struct ieee80211_reg_rule *rule1, 5649c96477dSLuis R. Rodriguez const struct ieee80211_reg_rule *rule2, 5659c96477dSLuis R. Rodriguez struct ieee80211_reg_rule *intersected_rule) 5669c96477dSLuis R. Rodriguez { 5679c96477dSLuis R. Rodriguez const struct ieee80211_freq_range *freq_range1, *freq_range2; 5689c96477dSLuis R. Rodriguez struct ieee80211_freq_range *freq_range; 5699c96477dSLuis R. Rodriguez const struct ieee80211_power_rule *power_rule1, *power_rule2; 5709c96477dSLuis R. Rodriguez struct ieee80211_power_rule *power_rule; 5719c96477dSLuis R. Rodriguez u32 freq_diff; 5729c96477dSLuis R. Rodriguez 5739c96477dSLuis R. Rodriguez freq_range1 = &rule1->freq_range; 5749c96477dSLuis R. Rodriguez freq_range2 = &rule2->freq_range; 5759c96477dSLuis R. Rodriguez freq_range = &intersected_rule->freq_range; 5769c96477dSLuis R. Rodriguez 5779c96477dSLuis R. Rodriguez power_rule1 = &rule1->power_rule; 5789c96477dSLuis R. Rodriguez power_rule2 = &rule2->power_rule; 5799c96477dSLuis R. Rodriguez power_rule = &intersected_rule->power_rule; 5809c96477dSLuis R. Rodriguez 5819c96477dSLuis R. Rodriguez freq_range->start_freq_khz = max(freq_range1->start_freq_khz, 5829c96477dSLuis R. Rodriguez freq_range2->start_freq_khz); 5839c96477dSLuis R. Rodriguez freq_range->end_freq_khz = min(freq_range1->end_freq_khz, 5849c96477dSLuis R. Rodriguez freq_range2->end_freq_khz); 5859c96477dSLuis R. Rodriguez freq_range->max_bandwidth_khz = min(freq_range1->max_bandwidth_khz, 5869c96477dSLuis R. Rodriguez freq_range2->max_bandwidth_khz); 5879c96477dSLuis R. Rodriguez 5889c96477dSLuis R. Rodriguez freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz; 5899c96477dSLuis R. Rodriguez if (freq_range->max_bandwidth_khz > freq_diff) 5909c96477dSLuis R. Rodriguez freq_range->max_bandwidth_khz = freq_diff; 5919c96477dSLuis R. Rodriguez 5929c96477dSLuis R. Rodriguez power_rule->max_eirp = min(power_rule1->max_eirp, 5939c96477dSLuis R. Rodriguez power_rule2->max_eirp); 5949c96477dSLuis R. Rodriguez power_rule->max_antenna_gain = min(power_rule1->max_antenna_gain, 5959c96477dSLuis R. Rodriguez power_rule2->max_antenna_gain); 5969c96477dSLuis R. Rodriguez 5971a919318SJohannes Berg intersected_rule->flags = rule1->flags | rule2->flags; 5989c96477dSLuis R. Rodriguez 5999c96477dSLuis R. Rodriguez if (!is_valid_reg_rule(intersected_rule)) 6009c96477dSLuis R. Rodriguez return -EINVAL; 6019c96477dSLuis R. Rodriguez 6029c96477dSLuis R. Rodriguez return 0; 6039c96477dSLuis R. Rodriguez } 6049c96477dSLuis R. Rodriguez 6059c96477dSLuis R. Rodriguez /** 6069c96477dSLuis R. Rodriguez * regdom_intersect - do the intersection between two regulatory domains 6079c96477dSLuis R. Rodriguez * @rd1: first regulatory domain 6089c96477dSLuis R. Rodriguez * @rd2: second regulatory domain 6099c96477dSLuis R. Rodriguez * 6109c96477dSLuis R. Rodriguez * Use this function to get the intersection between two regulatory domains. 6119c96477dSLuis R. Rodriguez * Once completed we will mark the alpha2 for the rd as intersected, "98", 6129c96477dSLuis R. Rodriguez * as no one single alpha2 can represent this regulatory domain. 6139c96477dSLuis R. Rodriguez * 6149c96477dSLuis R. Rodriguez * Returns a pointer to the regulatory domain structure which will hold the 6159c96477dSLuis R. Rodriguez * resulting intersection of rules between rd1 and rd2. We will 6169c96477dSLuis R. Rodriguez * kzalloc() this structure for you. 6179c96477dSLuis R. Rodriguez */ 6181a919318SJohannes Berg static struct ieee80211_regdomain * 6191a919318SJohannes Berg regdom_intersect(const struct ieee80211_regdomain *rd1, 6209c96477dSLuis R. Rodriguez const struct ieee80211_regdomain *rd2) 6219c96477dSLuis R. Rodriguez { 6229c96477dSLuis R. Rodriguez int r, size_of_regd; 6239c96477dSLuis R. Rodriguez unsigned int x, y; 6249c96477dSLuis R. Rodriguez unsigned int num_rules = 0, rule_idx = 0; 6259c96477dSLuis R. Rodriguez const struct ieee80211_reg_rule *rule1, *rule2; 6269c96477dSLuis R. Rodriguez struct ieee80211_reg_rule *intersected_rule; 6279c96477dSLuis R. Rodriguez struct ieee80211_regdomain *rd; 6289c96477dSLuis R. Rodriguez /* This is just a dummy holder to help us count */ 62974f53cd8SJohannes Berg struct ieee80211_reg_rule dummy_rule; 6309c96477dSLuis R. Rodriguez 6319c96477dSLuis R. Rodriguez if (!rd1 || !rd2) 6329c96477dSLuis R. Rodriguez return NULL; 6339c96477dSLuis R. Rodriguez 634fb1fc7adSLuis R. Rodriguez /* 635fb1fc7adSLuis R. Rodriguez * First we get a count of the rules we'll need, then we actually 6369c96477dSLuis R. Rodriguez * build them. This is to so we can malloc() and free() a 6379c96477dSLuis R. Rodriguez * regdomain once. The reason we use reg_rules_intersect() here 6389c96477dSLuis R. Rodriguez * is it will return -EINVAL if the rule computed makes no sense. 639fb1fc7adSLuis R. Rodriguez * All rules that do check out OK are valid. 640fb1fc7adSLuis R. Rodriguez */ 6419c96477dSLuis R. Rodriguez 6429c96477dSLuis R. Rodriguez for (x = 0; x < rd1->n_reg_rules; x++) { 6439c96477dSLuis R. Rodriguez rule1 = &rd1->reg_rules[x]; 6449c96477dSLuis R. Rodriguez for (y = 0; y < rd2->n_reg_rules; y++) { 6459c96477dSLuis R. Rodriguez rule2 = &rd2->reg_rules[y]; 64674f53cd8SJohannes Berg if (!reg_rules_intersect(rule1, rule2, &dummy_rule)) 6479c96477dSLuis R. Rodriguez num_rules++; 6489c96477dSLuis R. Rodriguez } 6499c96477dSLuis R. Rodriguez } 6509c96477dSLuis R. Rodriguez 6519c96477dSLuis R. Rodriguez if (!num_rules) 6529c96477dSLuis R. Rodriguez return NULL; 6539c96477dSLuis R. Rodriguez 6549c96477dSLuis R. Rodriguez size_of_regd = sizeof(struct ieee80211_regdomain) + 65582f20856SJohannes Berg num_rules * sizeof(struct ieee80211_reg_rule); 6569c96477dSLuis R. Rodriguez 6579c96477dSLuis R. Rodriguez rd = kzalloc(size_of_regd, GFP_KERNEL); 6589c96477dSLuis R. Rodriguez if (!rd) 6599c96477dSLuis R. Rodriguez return NULL; 6609c96477dSLuis R. Rodriguez 6618a57fff0SJohannes Berg for (x = 0; x < rd1->n_reg_rules && rule_idx < num_rules; x++) { 6629c96477dSLuis R. Rodriguez rule1 = &rd1->reg_rules[x]; 6638a57fff0SJohannes Berg for (y = 0; y < rd2->n_reg_rules && rule_idx < num_rules; y++) { 6649c96477dSLuis R. Rodriguez rule2 = &rd2->reg_rules[y]; 665fb1fc7adSLuis R. Rodriguez /* 666fb1fc7adSLuis R. Rodriguez * This time around instead of using the stack lets 6679c96477dSLuis R. Rodriguez * write to the target rule directly saving ourselves 668fb1fc7adSLuis R. Rodriguez * a memcpy() 669fb1fc7adSLuis R. Rodriguez */ 6709c96477dSLuis R. Rodriguez intersected_rule = &rd->reg_rules[rule_idx]; 6711a919318SJohannes Berg r = reg_rules_intersect(rule1, rule2, intersected_rule); 672fb1fc7adSLuis R. Rodriguez /* 673fb1fc7adSLuis R. Rodriguez * No need to memset here the intersected rule here as 674fb1fc7adSLuis R. Rodriguez * we're not using the stack anymore 675fb1fc7adSLuis R. Rodriguez */ 6769c96477dSLuis R. Rodriguez if (r) 6779c96477dSLuis R. Rodriguez continue; 6789c96477dSLuis R. Rodriguez rule_idx++; 6799c96477dSLuis R. Rodriguez } 6809c96477dSLuis R. Rodriguez } 6819c96477dSLuis R. Rodriguez 6829c96477dSLuis R. Rodriguez if (rule_idx != num_rules) { 6839c96477dSLuis R. Rodriguez kfree(rd); 6849c96477dSLuis R. Rodriguez return NULL; 6859c96477dSLuis R. Rodriguez } 6869c96477dSLuis R. Rodriguez 6879c96477dSLuis R. Rodriguez rd->n_reg_rules = num_rules; 6889c96477dSLuis R. Rodriguez rd->alpha2[0] = '9'; 6899c96477dSLuis R. Rodriguez rd->alpha2[1] = '8'; 6909c96477dSLuis R. Rodriguez 6919c96477dSLuis R. Rodriguez return rd; 6929c96477dSLuis R. Rodriguez } 6939c96477dSLuis R. Rodriguez 694fb1fc7adSLuis R. Rodriguez /* 695fb1fc7adSLuis R. Rodriguez * XXX: add support for the rest of enum nl80211_reg_rule_flags, we may 696fb1fc7adSLuis R. Rodriguez * want to just have the channel structure use these 697fb1fc7adSLuis R. Rodriguez */ 698b2e1b302SLuis R. Rodriguez static u32 map_regdom_flags(u32 rd_flags) 699b2e1b302SLuis R. Rodriguez { 700b2e1b302SLuis R. Rodriguez u32 channel_flags = 0; 701b2e1b302SLuis R. Rodriguez if (rd_flags & NL80211_RRF_PASSIVE_SCAN) 702b2e1b302SLuis R. Rodriguez channel_flags |= IEEE80211_CHAN_PASSIVE_SCAN; 703b2e1b302SLuis R. Rodriguez if (rd_flags & NL80211_RRF_NO_IBSS) 704b2e1b302SLuis R. Rodriguez channel_flags |= IEEE80211_CHAN_NO_IBSS; 705b2e1b302SLuis R. Rodriguez if (rd_flags & NL80211_RRF_DFS) 706b2e1b302SLuis R. Rodriguez channel_flags |= IEEE80211_CHAN_RADAR; 70703f6b084SSeth Forshee if (rd_flags & NL80211_RRF_NO_OFDM) 70803f6b084SSeth Forshee channel_flags |= IEEE80211_CHAN_NO_OFDM; 709b2e1b302SLuis R. Rodriguez return channel_flags; 710b2e1b302SLuis R. Rodriguez } 711b2e1b302SLuis R. Rodriguez 712361c9c8bSJohannes Berg static const struct ieee80211_reg_rule * 713361c9c8bSJohannes Berg freq_reg_info_regd(struct wiphy *wiphy, u32 center_freq, 7145d885b99SJohannes Berg const struct ieee80211_regdomain *regd) 7158318d78aSJohannes Berg { 7168318d78aSJohannes Berg int i; 7170c7dc45dSLuis R. Rodriguez bool band_rule_found = false; 718038659e7SLuis R. Rodriguez bool bw_fits = false; 719038659e7SLuis R. Rodriguez 7203e0c3ff3SLuis R. Rodriguez if (!regd) 721361c9c8bSJohannes Berg return ERR_PTR(-EINVAL); 722b2e1b302SLuis R. Rodriguez 7233e0c3ff3SLuis R. Rodriguez for (i = 0; i < regd->n_reg_rules; i++) { 724b2e1b302SLuis R. Rodriguez const struct ieee80211_reg_rule *rr; 725b2e1b302SLuis R. Rodriguez const struct ieee80211_freq_range *fr = NULL; 726b2e1b302SLuis R. Rodriguez 7273e0c3ff3SLuis R. Rodriguez rr = ®d->reg_rules[i]; 728b2e1b302SLuis R. Rodriguez fr = &rr->freq_range; 7290c7dc45dSLuis R. Rodriguez 730fb1fc7adSLuis R. Rodriguez /* 731fb1fc7adSLuis R. Rodriguez * We only need to know if one frequency rule was 7320c7dc45dSLuis R. Rodriguez * was in center_freq's band, that's enough, so lets 733fb1fc7adSLuis R. Rodriguez * not overwrite it once found 734fb1fc7adSLuis R. Rodriguez */ 7350c7dc45dSLuis R. Rodriguez if (!band_rule_found) 7360c7dc45dSLuis R. Rodriguez band_rule_found = freq_in_rule_band(fr, center_freq); 7370c7dc45dSLuis R. Rodriguez 738fe7ef5e9SJohannes Berg bw_fits = reg_does_bw_fit(fr, center_freq, MHZ_TO_KHZ(20)); 7390c7dc45dSLuis R. Rodriguez 740361c9c8bSJohannes Berg if (band_rule_found && bw_fits) 741361c9c8bSJohannes Berg return rr; 7428318d78aSJohannes Berg } 7438318d78aSJohannes Berg 7440c7dc45dSLuis R. Rodriguez if (!band_rule_found) 745361c9c8bSJohannes Berg return ERR_PTR(-ERANGE); 7460c7dc45dSLuis R. Rodriguez 747361c9c8bSJohannes Berg return ERR_PTR(-EINVAL); 748b2e1b302SLuis R. Rodriguez } 749b2e1b302SLuis R. Rodriguez 750361c9c8bSJohannes Berg const struct ieee80211_reg_rule *freq_reg_info(struct wiphy *wiphy, 751361c9c8bSJohannes Berg u32 center_freq) 7521fa25e41SLuis R. Rodriguez { 7535d885b99SJohannes Berg const struct ieee80211_regdomain *regd; 754c492db37SJohannes Berg struct regulatory_request *lr = get_last_request(); 7551a919318SJohannes Berg 7565d885b99SJohannes Berg /* 7575d885b99SJohannes Berg * Follow the driver's regulatory domain, if present, unless a country 7585d885b99SJohannes Berg * IE has been processed or a user wants to help complaince further 7595d885b99SJohannes Berg */ 760c492db37SJohannes Berg if (lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && 761c492db37SJohannes Berg lr->initiator != NL80211_REGDOM_SET_BY_USER && 7625d885b99SJohannes Berg wiphy->regd) 763458f4f9eSJohannes Berg regd = get_wiphy_regdom(wiphy); 7645d885b99SJohannes Berg else 765458f4f9eSJohannes Berg regd = get_cfg80211_regdom(); 7665d885b99SJohannes Berg 767361c9c8bSJohannes Berg return freq_reg_info_regd(wiphy, center_freq, regd); 7681fa25e41SLuis R. Rodriguez } 7694f366c5dSJohn W. Linville EXPORT_SYMBOL(freq_reg_info); 770b2e1b302SLuis R. Rodriguez 771926a0a09SLuis R. Rodriguez #ifdef CONFIG_CFG80211_REG_DEBUG 772926a0a09SLuis R. Rodriguez static const char *reg_initiator_name(enum nl80211_reg_initiator initiator) 773926a0a09SLuis R. Rodriguez { 774926a0a09SLuis R. Rodriguez switch (initiator) { 775926a0a09SLuis R. Rodriguez case NL80211_REGDOM_SET_BY_CORE: 776926a0a09SLuis R. Rodriguez return "Set by core"; 777926a0a09SLuis R. Rodriguez case NL80211_REGDOM_SET_BY_USER: 778926a0a09SLuis R. Rodriguez return "Set by user"; 779926a0a09SLuis R. Rodriguez case NL80211_REGDOM_SET_BY_DRIVER: 780926a0a09SLuis R. Rodriguez return "Set by driver"; 781926a0a09SLuis R. Rodriguez case NL80211_REGDOM_SET_BY_COUNTRY_IE: 782926a0a09SLuis R. Rodriguez return "Set by country IE"; 783926a0a09SLuis R. Rodriguez default: 784926a0a09SLuis R. Rodriguez WARN_ON(1); 785926a0a09SLuis R. Rodriguez return "Set by bug"; 786926a0a09SLuis R. Rodriguez } 787926a0a09SLuis R. Rodriguez } 788e702d3cfSLuis R. Rodriguez 789e702d3cfSLuis R. Rodriguez static void chan_reg_rule_print_dbg(struct ieee80211_channel *chan, 790e702d3cfSLuis R. Rodriguez const struct ieee80211_reg_rule *reg_rule) 791e702d3cfSLuis R. Rodriguez { 792e702d3cfSLuis R. Rodriguez const struct ieee80211_power_rule *power_rule; 793e702d3cfSLuis R. Rodriguez const struct ieee80211_freq_range *freq_range; 794e702d3cfSLuis R. Rodriguez char max_antenna_gain[32]; 795e702d3cfSLuis R. Rodriguez 796e702d3cfSLuis R. Rodriguez power_rule = ®_rule->power_rule; 797e702d3cfSLuis R. Rodriguez freq_range = ®_rule->freq_range; 798e702d3cfSLuis R. Rodriguez 799e702d3cfSLuis R. Rodriguez if (!power_rule->max_antenna_gain) 800e702d3cfSLuis R. Rodriguez snprintf(max_antenna_gain, 32, "N/A"); 801e702d3cfSLuis R. Rodriguez else 802e702d3cfSLuis R. Rodriguez snprintf(max_antenna_gain, 32, "%d", power_rule->max_antenna_gain); 803e702d3cfSLuis R. Rodriguez 804fe7ef5e9SJohannes Berg REG_DBG_PRINT("Updating information on frequency %d MHz with regulatory rule:\n", 805fe7ef5e9SJohannes Berg chan->center_freq); 806e702d3cfSLuis R. Rodriguez 80756e6786eSPavel Roskin REG_DBG_PRINT("%d KHz - %d KHz @ %d KHz), (%s mBi, %d mBm)\n", 8081a919318SJohannes Berg freq_range->start_freq_khz, freq_range->end_freq_khz, 8091a919318SJohannes Berg freq_range->max_bandwidth_khz, max_antenna_gain, 810e702d3cfSLuis R. Rodriguez power_rule->max_eirp); 811e702d3cfSLuis R. Rodriguez } 812e702d3cfSLuis R. Rodriguez #else 813e702d3cfSLuis R. Rodriguez static void chan_reg_rule_print_dbg(struct ieee80211_channel *chan, 814e702d3cfSLuis R. Rodriguez const struct ieee80211_reg_rule *reg_rule) 815e702d3cfSLuis R. Rodriguez { 816e702d3cfSLuis R. Rodriguez return; 817e702d3cfSLuis R. Rodriguez } 818926a0a09SLuis R. Rodriguez #endif 819926a0a09SLuis R. Rodriguez 820038659e7SLuis R. Rodriguez /* 821038659e7SLuis R. Rodriguez * Note that right now we assume the desired channel bandwidth 822038659e7SLuis R. Rodriguez * is always 20 MHz for each individual channel (HT40 uses 20 MHz 823fe7ef5e9SJohannes Berg * per channel, the primary and the extension channel). 824038659e7SLuis R. Rodriguez */ 8257ca43d03SLuis R. Rodriguez static void handle_channel(struct wiphy *wiphy, 8267ca43d03SLuis R. Rodriguez enum nl80211_reg_initiator initiator, 827fdc9d7b2SJohannes Berg struct ieee80211_channel *chan) 828b2e1b302SLuis R. Rodriguez { 829038659e7SLuis R. Rodriguez u32 flags, bw_flags = 0; 830b2e1b302SLuis R. Rodriguez const struct ieee80211_reg_rule *reg_rule = NULL; 831b2e1b302SLuis R. Rodriguez const struct ieee80211_power_rule *power_rule = NULL; 832038659e7SLuis R. Rodriguez const struct ieee80211_freq_range *freq_range = NULL; 833fe33eb39SLuis R. Rodriguez struct wiphy *request_wiphy = NULL; 834c492db37SJohannes Berg struct regulatory_request *lr = get_last_request(); 835a92a3ce7SLuis R. Rodriguez 836c492db37SJohannes Berg request_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx); 837a92a3ce7SLuis R. Rodriguez 838a92a3ce7SLuis R. Rodriguez flags = chan->orig_flags; 839b2e1b302SLuis R. Rodriguez 840361c9c8bSJohannes Berg reg_rule = freq_reg_info(wiphy, MHZ_TO_KHZ(chan->center_freq)); 841361c9c8bSJohannes Berg if (IS_ERR(reg_rule)) { 842ca4ffe8fSLuis R. Rodriguez /* 843ca4ffe8fSLuis R. Rodriguez * We will disable all channels that do not match our 84425985edcSLucas De Marchi * received regulatory rule unless the hint is coming 845ca4ffe8fSLuis R. Rodriguez * from a Country IE and the Country IE had no information 846ca4ffe8fSLuis R. Rodriguez * about a band. The IEEE 802.11 spec allows for an AP 847ca4ffe8fSLuis R. Rodriguez * to send only a subset of the regulatory rules allowed, 848ca4ffe8fSLuis R. Rodriguez * so an AP in the US that only supports 2.4 GHz may only send 849ca4ffe8fSLuis R. Rodriguez * a country IE with information for the 2.4 GHz band 850ca4ffe8fSLuis R. Rodriguez * while 5 GHz is still supported. 851ca4ffe8fSLuis R. Rodriguez */ 852ca4ffe8fSLuis R. Rodriguez if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE && 853361c9c8bSJohannes Berg PTR_ERR(reg_rule) == -ERANGE) 8548318d78aSJohannes Berg return; 8558318d78aSJohannes Berg 856d91e41b6SLuis R. Rodriguez REG_DBG_PRINT("Disabling freq %d MHz\n", chan->center_freq); 857990de49fSJohannes Berg chan->flags |= IEEE80211_CHAN_DISABLED; 858ca4ffe8fSLuis R. Rodriguez return; 859ca4ffe8fSLuis R. Rodriguez } 860ca4ffe8fSLuis R. Rodriguez 861fe7ef5e9SJohannes Berg chan_reg_rule_print_dbg(chan, reg_rule); 862e702d3cfSLuis R. Rodriguez 863b2e1b302SLuis R. Rodriguez power_rule = ®_rule->power_rule; 864038659e7SLuis R. Rodriguez freq_range = ®_rule->freq_range; 865038659e7SLuis R. Rodriguez 866038659e7SLuis R. Rodriguez if (freq_range->max_bandwidth_khz < MHZ_TO_KHZ(40)) 867038659e7SLuis R. Rodriguez bw_flags = IEEE80211_CHAN_NO_HT40; 868c7a6ee27SJohannes Berg if (freq_range->max_bandwidth_khz < MHZ_TO_KHZ(80)) 869c7a6ee27SJohannes Berg bw_flags |= IEEE80211_CHAN_NO_80MHZ; 870c7a6ee27SJohannes Berg if (freq_range->max_bandwidth_khz < MHZ_TO_KHZ(160)) 871c7a6ee27SJohannes Berg bw_flags |= IEEE80211_CHAN_NO_160MHZ; 872b2e1b302SLuis R. Rodriguez 873c492db37SJohannes Berg if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER && 874806a9e39SLuis R. Rodriguez request_wiphy && request_wiphy == wiphy && 8755be83de5SJohannes Berg request_wiphy->flags & WIPHY_FLAG_STRICT_REGULATORY) { 876fb1fc7adSLuis R. Rodriguez /* 87725985edcSLucas De Marchi * This guarantees the driver's requested regulatory domain 878f976376dSLuis R. Rodriguez * will always be used as a base for further regulatory 879fb1fc7adSLuis R. Rodriguez * settings 880fb1fc7adSLuis R. Rodriguez */ 881f976376dSLuis R. Rodriguez chan->flags = chan->orig_flags = 882038659e7SLuis R. Rodriguez map_regdom_flags(reg_rule->flags) | bw_flags; 883f976376dSLuis R. Rodriguez chan->max_antenna_gain = chan->orig_mag = 884f976376dSLuis R. Rodriguez (int) MBI_TO_DBI(power_rule->max_antenna_gain); 885279f0f55SFelix Fietkau chan->max_reg_power = chan->max_power = chan->orig_mpwr = 886f976376dSLuis R. Rodriguez (int) MBM_TO_DBM(power_rule->max_eirp); 887f976376dSLuis R. Rodriguez return; 888f976376dSLuis R. Rodriguez } 889f976376dSLuis R. Rodriguez 89004f39047SSimon Wunderlich chan->dfs_state = NL80211_DFS_USABLE; 89104f39047SSimon Wunderlich chan->dfs_state_entered = jiffies; 89204f39047SSimon Wunderlich 893aa3d7eefSRajkumar Manoharan chan->beacon_found = false; 894038659e7SLuis R. Rodriguez chan->flags = flags | bw_flags | map_regdom_flags(reg_rule->flags); 8951a919318SJohannes Berg chan->max_antenna_gain = 8961a919318SJohannes Berg min_t(int, chan->orig_mag, 8971a919318SJohannes Berg MBI_TO_DBI(power_rule->max_antenna_gain)); 898eccc068eSHong Wu chan->max_reg_power = (int) MBM_TO_DBM(power_rule->max_eirp); 8995e31fc08SStanislaw Gruszka if (chan->orig_mpwr) { 9005e31fc08SStanislaw Gruszka /* 9015e31fc08SStanislaw Gruszka * Devices that have their own custom regulatory domain 9025e31fc08SStanislaw Gruszka * but also use WIPHY_FLAG_STRICT_REGULATORY will follow the 9035e31fc08SStanislaw Gruszka * passed country IE power settings. 9045e31fc08SStanislaw Gruszka */ 9055e31fc08SStanislaw Gruszka if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE && 9065e31fc08SStanislaw Gruszka wiphy->flags & WIPHY_FLAG_CUSTOM_REGULATORY && 9075e31fc08SStanislaw Gruszka wiphy->flags & WIPHY_FLAG_STRICT_REGULATORY) 9085e31fc08SStanislaw Gruszka chan->max_power = chan->max_reg_power; 9095e31fc08SStanislaw Gruszka else 9105e31fc08SStanislaw Gruszka chan->max_power = min(chan->orig_mpwr, 9115e31fc08SStanislaw Gruszka chan->max_reg_power); 9125e31fc08SStanislaw Gruszka } else 9135e31fc08SStanislaw Gruszka chan->max_power = chan->max_reg_power; 9148318d78aSJohannes Berg } 9158318d78aSJohannes Berg 9167ca43d03SLuis R. Rodriguez static void handle_band(struct wiphy *wiphy, 917fdc9d7b2SJohannes Berg enum nl80211_reg_initiator initiator, 918fdc9d7b2SJohannes Berg struct ieee80211_supported_band *sband) 9198318d78aSJohannes Berg { 920a92a3ce7SLuis R. Rodriguez unsigned int i; 921a92a3ce7SLuis R. Rodriguez 922fdc9d7b2SJohannes Berg if (!sband) 923fdc9d7b2SJohannes Berg return; 9248318d78aSJohannes Berg 9258318d78aSJohannes Berg for (i = 0; i < sband->n_channels; i++) 926fdc9d7b2SJohannes Berg handle_channel(wiphy, initiator, &sband->channels[i]); 9278318d78aSJohannes Berg } 9288318d78aSJohannes Berg 92957b5ce07SLuis R. Rodriguez static bool reg_request_cell_base(struct regulatory_request *request) 93057b5ce07SLuis R. Rodriguez { 93157b5ce07SLuis R. Rodriguez if (request->initiator != NL80211_REGDOM_SET_BY_USER) 93257b5ce07SLuis R. Rodriguez return false; 9331a919318SJohannes Berg return request->user_reg_hint_type == NL80211_USER_REG_HINT_CELL_BASE; 93457b5ce07SLuis R. Rodriguez } 93557b5ce07SLuis R. Rodriguez 93657b5ce07SLuis R. Rodriguez bool reg_last_request_cell_base(void) 93757b5ce07SLuis R. Rodriguez { 93838fd2143SJohannes Berg return reg_request_cell_base(get_last_request()); 93957b5ce07SLuis R. Rodriguez } 94057b5ce07SLuis R. Rodriguez 94157b5ce07SLuis R. Rodriguez #ifdef CONFIG_CFG80211_CERTIFICATION_ONUS 94257b5ce07SLuis R. Rodriguez /* Core specific check */ 9432f92212bSJohannes Berg static enum reg_request_treatment 9442f92212bSJohannes Berg reg_ignore_cell_hint(struct regulatory_request *pending_request) 94557b5ce07SLuis R. Rodriguez { 946c492db37SJohannes Berg struct regulatory_request *lr = get_last_request(); 94757b5ce07SLuis R. Rodriguez 94857b5ce07SLuis R. Rodriguez if (!reg_num_devs_support_basehint) 9492f92212bSJohannes Berg return REG_REQ_IGNORE; 95057b5ce07SLuis R. Rodriguez 951c492db37SJohannes Berg if (reg_request_cell_base(lr) && 9521a919318SJohannes Berg !regdom_changes(pending_request->alpha2)) 9532f92212bSJohannes Berg return REG_REQ_ALREADY_SET; 9541a919318SJohannes Berg 9552f92212bSJohannes Berg return REG_REQ_OK; 95657b5ce07SLuis R. Rodriguez } 95757b5ce07SLuis R. Rodriguez 95857b5ce07SLuis R. Rodriguez /* Device specific check */ 95957b5ce07SLuis R. Rodriguez static bool reg_dev_ignore_cell_hint(struct wiphy *wiphy) 96057b5ce07SLuis R. Rodriguez { 9611a919318SJohannes Berg return !(wiphy->features & NL80211_FEATURE_CELL_BASE_REG_HINTS); 96257b5ce07SLuis R. Rodriguez } 96357b5ce07SLuis R. Rodriguez #else 96457b5ce07SLuis R. Rodriguez static int reg_ignore_cell_hint(struct regulatory_request *pending_request) 96557b5ce07SLuis R. Rodriguez { 9662f92212bSJohannes Berg return REG_REQ_IGNORE; 96757b5ce07SLuis R. Rodriguez } 9681a919318SJohannes Berg 9691a919318SJohannes Berg static bool reg_dev_ignore_cell_hint(struct wiphy *wiphy) 97057b5ce07SLuis R. Rodriguez { 97157b5ce07SLuis R. Rodriguez return true; 97257b5ce07SLuis R. Rodriguez } 97357b5ce07SLuis R. Rodriguez #endif 97457b5ce07SLuis R. Rodriguez 97557b5ce07SLuis R. Rodriguez 9767db90f4aSLuis R. Rodriguez static bool ignore_reg_update(struct wiphy *wiphy, 9777db90f4aSLuis R. Rodriguez enum nl80211_reg_initiator initiator) 97814b9815aSLuis R. Rodriguez { 979c492db37SJohannes Berg struct regulatory_request *lr = get_last_request(); 980c492db37SJohannes Berg 981c492db37SJohannes Berg if (!lr) { 9821a919318SJohannes Berg REG_DBG_PRINT("Ignoring regulatory request %s since last_request is not set\n", 983926a0a09SLuis R. Rodriguez reg_initiator_name(initiator)); 98414b9815aSLuis R. Rodriguez return true; 985926a0a09SLuis R. Rodriguez } 986926a0a09SLuis R. Rodriguez 9877db90f4aSLuis R. Rodriguez if (initiator == NL80211_REGDOM_SET_BY_CORE && 988926a0a09SLuis R. Rodriguez wiphy->flags & WIPHY_FLAG_CUSTOM_REGULATORY) { 9891a919318SJohannes Berg REG_DBG_PRINT("Ignoring regulatory request %s since the driver uses its own custom regulatory domain\n", 990926a0a09SLuis R. Rodriguez reg_initiator_name(initiator)); 99114b9815aSLuis R. Rodriguez return true; 992926a0a09SLuis R. Rodriguez } 993926a0a09SLuis R. Rodriguez 994fb1fc7adSLuis R. Rodriguez /* 995fb1fc7adSLuis R. Rodriguez * wiphy->regd will be set once the device has its own 996fb1fc7adSLuis R. Rodriguez * desired regulatory domain set 997fb1fc7adSLuis R. Rodriguez */ 9985be83de5SJohannes Berg if (wiphy->flags & WIPHY_FLAG_STRICT_REGULATORY && !wiphy->regd && 999749b527bSLuis R. Rodriguez initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && 1000c492db37SJohannes Berg !is_world_regdom(lr->alpha2)) { 10011a919318SJohannes Berg REG_DBG_PRINT("Ignoring regulatory request %s since the driver requires its own regulatory domain to be set first\n", 1002926a0a09SLuis R. Rodriguez reg_initiator_name(initiator)); 100314b9815aSLuis R. Rodriguez return true; 1004926a0a09SLuis R. Rodriguez } 1005926a0a09SLuis R. Rodriguez 1006c492db37SJohannes Berg if (reg_request_cell_base(lr)) 100757b5ce07SLuis R. Rodriguez return reg_dev_ignore_cell_hint(wiphy); 100857b5ce07SLuis R. Rodriguez 100914b9815aSLuis R. Rodriguez return false; 101014b9815aSLuis R. Rodriguez } 101114b9815aSLuis R. Rodriguez 10123195e489SLuis R. Rodriguez static bool reg_is_world_roaming(struct wiphy *wiphy) 10133195e489SLuis R. Rodriguez { 10143195e489SLuis R. Rodriguez const struct ieee80211_regdomain *cr = get_cfg80211_regdom(); 10153195e489SLuis R. Rodriguez const struct ieee80211_regdomain *wr = get_wiphy_regdom(wiphy); 10163195e489SLuis R. Rodriguez struct regulatory_request *lr = get_last_request(); 10173195e489SLuis R. Rodriguez 10183195e489SLuis R. Rodriguez if (is_world_regdom(cr->alpha2) || (wr && is_world_regdom(wr->alpha2))) 10193195e489SLuis R. Rodriguez return true; 10203195e489SLuis R. Rodriguez 10213195e489SLuis R. Rodriguez if (lr && lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && 10223195e489SLuis R. Rodriguez wiphy->flags & WIPHY_FLAG_CUSTOM_REGULATORY) 10233195e489SLuis R. Rodriguez return true; 10243195e489SLuis R. Rodriguez 10253195e489SLuis R. Rodriguez return false; 10263195e489SLuis R. Rodriguez } 10273195e489SLuis R. Rodriguez 10281a919318SJohannes Berg static void handle_reg_beacon(struct wiphy *wiphy, unsigned int chan_idx, 1029e38f8a7aSLuis R. Rodriguez struct reg_beacon *reg_beacon) 1030e38f8a7aSLuis R. Rodriguez { 1031e38f8a7aSLuis R. Rodriguez struct ieee80211_supported_band *sband; 1032e38f8a7aSLuis R. Rodriguez struct ieee80211_channel *chan; 10336bad8766SLuis R. Rodriguez bool channel_changed = false; 10346bad8766SLuis R. Rodriguez struct ieee80211_channel chan_before; 1035e38f8a7aSLuis R. Rodriguez 1036e38f8a7aSLuis R. Rodriguez sband = wiphy->bands[reg_beacon->chan.band]; 1037e38f8a7aSLuis R. Rodriguez chan = &sband->channels[chan_idx]; 1038e38f8a7aSLuis R. Rodriguez 1039e38f8a7aSLuis R. Rodriguez if (likely(chan->center_freq != reg_beacon->chan.center_freq)) 1040e38f8a7aSLuis R. Rodriguez return; 1041e38f8a7aSLuis R. Rodriguez 10426bad8766SLuis R. Rodriguez if (chan->beacon_found) 10436bad8766SLuis R. Rodriguez return; 10446bad8766SLuis R. Rodriguez 10456bad8766SLuis R. Rodriguez chan->beacon_found = true; 10466bad8766SLuis R. Rodriguez 10470f500a5fSLuis R. Rodriguez if (!reg_is_world_roaming(wiphy)) 10480f500a5fSLuis R. Rodriguez return; 10490f500a5fSLuis R. Rodriguez 10505be83de5SJohannes Berg if (wiphy->flags & WIPHY_FLAG_DISABLE_BEACON_HINTS) 105137184244SLuis R. Rodriguez return; 105237184244SLuis R. Rodriguez 10536bad8766SLuis R. Rodriguez chan_before.center_freq = chan->center_freq; 10546bad8766SLuis R. Rodriguez chan_before.flags = chan->flags; 10556bad8766SLuis R. Rodriguez 105637184244SLuis R. Rodriguez if (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN) { 1057e38f8a7aSLuis R. Rodriguez chan->flags &= ~IEEE80211_CHAN_PASSIVE_SCAN; 10586bad8766SLuis R. Rodriguez channel_changed = true; 1059e38f8a7aSLuis R. Rodriguez } 1060e38f8a7aSLuis R. Rodriguez 106137184244SLuis R. Rodriguez if (chan->flags & IEEE80211_CHAN_NO_IBSS) { 1062e38f8a7aSLuis R. Rodriguez chan->flags &= ~IEEE80211_CHAN_NO_IBSS; 10636bad8766SLuis R. Rodriguez channel_changed = true; 1064e38f8a7aSLuis R. Rodriguez } 1065e38f8a7aSLuis R. Rodriguez 10666bad8766SLuis R. Rodriguez if (channel_changed) 10676bad8766SLuis R. Rodriguez nl80211_send_beacon_hint_event(wiphy, &chan_before, chan); 1068e38f8a7aSLuis R. Rodriguez } 1069e38f8a7aSLuis R. Rodriguez 1070e38f8a7aSLuis R. Rodriguez /* 1071e38f8a7aSLuis R. Rodriguez * Called when a scan on a wiphy finds a beacon on 1072e38f8a7aSLuis R. Rodriguez * new channel 1073e38f8a7aSLuis R. Rodriguez */ 1074e38f8a7aSLuis R. Rodriguez static void wiphy_update_new_beacon(struct wiphy *wiphy, 1075e38f8a7aSLuis R. Rodriguez struct reg_beacon *reg_beacon) 1076e38f8a7aSLuis R. Rodriguez { 1077e38f8a7aSLuis R. Rodriguez unsigned int i; 1078e38f8a7aSLuis R. Rodriguez struct ieee80211_supported_band *sband; 1079e38f8a7aSLuis R. Rodriguez 1080e38f8a7aSLuis R. Rodriguez if (!wiphy->bands[reg_beacon->chan.band]) 1081e38f8a7aSLuis R. Rodriguez return; 1082e38f8a7aSLuis R. Rodriguez 1083e38f8a7aSLuis R. Rodriguez sband = wiphy->bands[reg_beacon->chan.band]; 1084e38f8a7aSLuis R. Rodriguez 1085e38f8a7aSLuis R. Rodriguez for (i = 0; i < sband->n_channels; i++) 1086e38f8a7aSLuis R. Rodriguez handle_reg_beacon(wiphy, i, reg_beacon); 1087e38f8a7aSLuis R. Rodriguez } 1088e38f8a7aSLuis R. Rodriguez 1089e38f8a7aSLuis R. Rodriguez /* 1090e38f8a7aSLuis R. Rodriguez * Called upon reg changes or a new wiphy is added 1091e38f8a7aSLuis R. Rodriguez */ 1092e38f8a7aSLuis R. Rodriguez static void wiphy_update_beacon_reg(struct wiphy *wiphy) 1093e38f8a7aSLuis R. Rodriguez { 1094e38f8a7aSLuis R. Rodriguez unsigned int i; 1095e38f8a7aSLuis R. Rodriguez struct ieee80211_supported_band *sband; 1096e38f8a7aSLuis R. Rodriguez struct reg_beacon *reg_beacon; 1097e38f8a7aSLuis R. Rodriguez 1098e38f8a7aSLuis R. Rodriguez list_for_each_entry(reg_beacon, ®_beacon_list, list) { 1099e38f8a7aSLuis R. Rodriguez if (!wiphy->bands[reg_beacon->chan.band]) 1100e38f8a7aSLuis R. Rodriguez continue; 1101e38f8a7aSLuis R. Rodriguez sband = wiphy->bands[reg_beacon->chan.band]; 1102e38f8a7aSLuis R. Rodriguez for (i = 0; i < sband->n_channels; i++) 1103e38f8a7aSLuis R. Rodriguez handle_reg_beacon(wiphy, i, reg_beacon); 1104e38f8a7aSLuis R. Rodriguez } 1105e38f8a7aSLuis R. Rodriguez } 1106e38f8a7aSLuis R. Rodriguez 1107e38f8a7aSLuis R. Rodriguez /* Reap the advantages of previously found beacons */ 1108e38f8a7aSLuis R. Rodriguez static void reg_process_beacons(struct wiphy *wiphy) 1109e38f8a7aSLuis R. Rodriguez { 1110b1ed8dddSLuis R. Rodriguez /* 1111b1ed8dddSLuis R. Rodriguez * Means we are just firing up cfg80211, so no beacons would 1112b1ed8dddSLuis R. Rodriguez * have been processed yet. 1113b1ed8dddSLuis R. Rodriguez */ 1114b1ed8dddSLuis R. Rodriguez if (!last_request) 1115b1ed8dddSLuis R. Rodriguez return; 1116e38f8a7aSLuis R. Rodriguez wiphy_update_beacon_reg(wiphy); 1117e38f8a7aSLuis R. Rodriguez } 1118e38f8a7aSLuis R. Rodriguez 11191a919318SJohannes Berg static bool is_ht40_allowed(struct ieee80211_channel *chan) 1120038659e7SLuis R. Rodriguez { 1121038659e7SLuis R. Rodriguez if (!chan) 1122038659e7SLuis R. Rodriguez return false; 11231a919318SJohannes Berg if (chan->flags & IEEE80211_CHAN_DISABLED) 11241a919318SJohannes Berg return false; 11251a919318SJohannes Berg /* This would happen when regulatory rules disallow HT40 completely */ 112655b183adSFelix Fietkau if ((chan->flags & IEEE80211_CHAN_NO_HT40) == IEEE80211_CHAN_NO_HT40) 112755b183adSFelix Fietkau return false; 112855b183adSFelix Fietkau return true; 1129038659e7SLuis R. Rodriguez } 1130038659e7SLuis R. Rodriguez 1131038659e7SLuis R. Rodriguez static void reg_process_ht_flags_channel(struct wiphy *wiphy, 1132fdc9d7b2SJohannes Berg struct ieee80211_channel *channel) 1133038659e7SLuis R. Rodriguez { 1134fdc9d7b2SJohannes Berg struct ieee80211_supported_band *sband = wiphy->bands[channel->band]; 1135038659e7SLuis R. Rodriguez struct ieee80211_channel *channel_before = NULL, *channel_after = NULL; 1136038659e7SLuis R. Rodriguez unsigned int i; 1137038659e7SLuis R. Rodriguez 11381a919318SJohannes Berg if (!is_ht40_allowed(channel)) { 1139038659e7SLuis R. Rodriguez channel->flags |= IEEE80211_CHAN_NO_HT40; 1140038659e7SLuis R. Rodriguez return; 1141038659e7SLuis R. Rodriguez } 1142038659e7SLuis R. Rodriguez 1143038659e7SLuis R. Rodriguez /* 1144038659e7SLuis R. Rodriguez * We need to ensure the extension channels exist to 1145038659e7SLuis R. Rodriguez * be able to use HT40- or HT40+, this finds them (or not) 1146038659e7SLuis R. Rodriguez */ 1147038659e7SLuis R. Rodriguez for (i = 0; i < sband->n_channels; i++) { 1148038659e7SLuis R. Rodriguez struct ieee80211_channel *c = &sband->channels[i]; 11491a919318SJohannes Berg 1150038659e7SLuis R. Rodriguez if (c->center_freq == (channel->center_freq - 20)) 1151038659e7SLuis R. Rodriguez channel_before = c; 1152038659e7SLuis R. Rodriguez if (c->center_freq == (channel->center_freq + 20)) 1153038659e7SLuis R. Rodriguez channel_after = c; 1154038659e7SLuis R. Rodriguez } 1155038659e7SLuis R. Rodriguez 1156038659e7SLuis R. Rodriguez /* 1157038659e7SLuis R. Rodriguez * Please note that this assumes target bandwidth is 20 MHz, 1158038659e7SLuis R. Rodriguez * if that ever changes we also need to change the below logic 1159038659e7SLuis R. Rodriguez * to include that as well. 1160038659e7SLuis R. Rodriguez */ 11611a919318SJohannes Berg if (!is_ht40_allowed(channel_before)) 1162689da1b3SLuis R. Rodriguez channel->flags |= IEEE80211_CHAN_NO_HT40MINUS; 1163038659e7SLuis R. Rodriguez else 1164689da1b3SLuis R. Rodriguez channel->flags &= ~IEEE80211_CHAN_NO_HT40MINUS; 1165038659e7SLuis R. Rodriguez 11661a919318SJohannes Berg if (!is_ht40_allowed(channel_after)) 1167689da1b3SLuis R. Rodriguez channel->flags |= IEEE80211_CHAN_NO_HT40PLUS; 1168038659e7SLuis R. Rodriguez else 1169689da1b3SLuis R. Rodriguez channel->flags &= ~IEEE80211_CHAN_NO_HT40PLUS; 1170038659e7SLuis R. Rodriguez } 1171038659e7SLuis R. Rodriguez 1172038659e7SLuis R. Rodriguez static void reg_process_ht_flags_band(struct wiphy *wiphy, 1173fdc9d7b2SJohannes Berg struct ieee80211_supported_band *sband) 1174038659e7SLuis R. Rodriguez { 1175038659e7SLuis R. Rodriguez unsigned int i; 1176038659e7SLuis R. Rodriguez 1177fdc9d7b2SJohannes Berg if (!sband) 1178fdc9d7b2SJohannes Berg return; 1179038659e7SLuis R. Rodriguez 1180038659e7SLuis R. Rodriguez for (i = 0; i < sband->n_channels; i++) 1181fdc9d7b2SJohannes Berg reg_process_ht_flags_channel(wiphy, &sband->channels[i]); 1182038659e7SLuis R. Rodriguez } 1183038659e7SLuis R. Rodriguez 1184038659e7SLuis R. Rodriguez static void reg_process_ht_flags(struct wiphy *wiphy) 1185038659e7SLuis R. Rodriguez { 1186038659e7SLuis R. Rodriguez enum ieee80211_band band; 1187038659e7SLuis R. Rodriguez 1188038659e7SLuis R. Rodriguez if (!wiphy) 1189038659e7SLuis R. Rodriguez return; 1190038659e7SLuis R. Rodriguez 1191fdc9d7b2SJohannes Berg for (band = 0; band < IEEE80211_NUM_BANDS; band++) 1192fdc9d7b2SJohannes Berg reg_process_ht_flags_band(wiphy, wiphy->bands[band]); 1193038659e7SLuis R. Rodriguez } 1194038659e7SLuis R. Rodriguez 1195eac03e38SSven Neumann static void wiphy_update_regulatory(struct wiphy *wiphy, 11967db90f4aSLuis R. Rodriguez enum nl80211_reg_initiator initiator) 11978318d78aSJohannes Berg { 11988318d78aSJohannes Berg enum ieee80211_band band; 1199c492db37SJohannes Berg struct regulatory_request *lr = get_last_request(); 1200eac03e38SSven Neumann 12017db90f4aSLuis R. Rodriguez if (ignore_reg_update(wiphy, initiator)) 1202a203c2aaSSven Neumann return; 1203a203c2aaSSven Neumann 1204c492db37SJohannes Berg lr->dfs_region = get_cfg80211_regdom()->dfs_region; 1205b68e6b3bSLuis R. Rodriguez 1206fdc9d7b2SJohannes Berg for (band = 0; band < IEEE80211_NUM_BANDS; band++) 1207fdc9d7b2SJohannes Berg handle_band(wiphy, initiator, wiphy->bands[band]); 1208a203c2aaSSven Neumann 1209e38f8a7aSLuis R. Rodriguez reg_process_beacons(wiphy); 1210038659e7SLuis R. Rodriguez reg_process_ht_flags(wiphy); 12111a919318SJohannes Berg 1212b2e1b302SLuis R. Rodriguez if (wiphy->reg_notifier) 1213c492db37SJohannes Berg wiphy->reg_notifier(wiphy, lr); 1214b2e1b302SLuis R. Rodriguez } 1215b2e1b302SLuis R. Rodriguez 1216d7549cbbSSven Neumann static void update_all_wiphy_regulatory(enum nl80211_reg_initiator initiator) 1217d7549cbbSSven Neumann { 1218d7549cbbSSven Neumann struct cfg80211_registered_device *rdev; 12194a38994fSRajkumar Manoharan struct wiphy *wiphy; 1220d7549cbbSSven Neumann 12215fe231e8SJohannes Berg ASSERT_RTNL(); 1222458f4f9eSJohannes Berg 12234a38994fSRajkumar Manoharan list_for_each_entry(rdev, &cfg80211_rdev_list, list) { 12244a38994fSRajkumar Manoharan wiphy = &rdev->wiphy; 12254a38994fSRajkumar Manoharan wiphy_update_regulatory(wiphy, initiator); 12264a38994fSRajkumar Manoharan /* 12274a38994fSRajkumar Manoharan * Regulatory updates set by CORE are ignored for custom 12284a38994fSRajkumar Manoharan * regulatory cards. Let us notify the changes to the driver, 12294a38994fSRajkumar Manoharan * as some drivers used this to restore its orig_* reg domain. 12304a38994fSRajkumar Manoharan */ 12314a38994fSRajkumar Manoharan if (initiator == NL80211_REGDOM_SET_BY_CORE && 12324a38994fSRajkumar Manoharan wiphy->flags & WIPHY_FLAG_CUSTOM_REGULATORY && 12334a38994fSRajkumar Manoharan wiphy->reg_notifier) 1234c492db37SJohannes Berg wiphy->reg_notifier(wiphy, get_last_request()); 12354a38994fSRajkumar Manoharan } 1236d7549cbbSSven Neumann } 1237d7549cbbSSven Neumann 12381fa25e41SLuis R. Rodriguez static void handle_channel_custom(struct wiphy *wiphy, 1239fdc9d7b2SJohannes Berg struct ieee80211_channel *chan, 12401fa25e41SLuis R. Rodriguez const struct ieee80211_regdomain *regd) 12411fa25e41SLuis R. Rodriguez { 1242038659e7SLuis R. Rodriguez u32 bw_flags = 0; 12431fa25e41SLuis R. Rodriguez const struct ieee80211_reg_rule *reg_rule = NULL; 12441fa25e41SLuis R. Rodriguez const struct ieee80211_power_rule *power_rule = NULL; 1245038659e7SLuis R. Rodriguez const struct ieee80211_freq_range *freq_range = NULL; 12461fa25e41SLuis R. Rodriguez 1247361c9c8bSJohannes Berg reg_rule = freq_reg_info_regd(wiphy, MHZ_TO_KHZ(chan->center_freq), 1248038659e7SLuis R. Rodriguez regd); 12491fa25e41SLuis R. Rodriguez 1250361c9c8bSJohannes Berg if (IS_ERR(reg_rule)) { 1251fe7ef5e9SJohannes Berg REG_DBG_PRINT("Disabling freq %d MHz as custom regd has no rule that fits it\n", 1252fe7ef5e9SJohannes Berg chan->center_freq); 12531fa25e41SLuis R. Rodriguez chan->flags = IEEE80211_CHAN_DISABLED; 12541fa25e41SLuis R. Rodriguez return; 12551fa25e41SLuis R. Rodriguez } 12561fa25e41SLuis R. Rodriguez 1257fe7ef5e9SJohannes Berg chan_reg_rule_print_dbg(chan, reg_rule); 1258e702d3cfSLuis R. Rodriguez 12591fa25e41SLuis R. Rodriguez power_rule = ®_rule->power_rule; 1260038659e7SLuis R. Rodriguez freq_range = ®_rule->freq_range; 12611fa25e41SLuis R. Rodriguez 1262038659e7SLuis R. Rodriguez if (freq_range->max_bandwidth_khz < MHZ_TO_KHZ(40)) 1263038659e7SLuis R. Rodriguez bw_flags = IEEE80211_CHAN_NO_HT40; 1264c7a6ee27SJohannes Berg if (freq_range->max_bandwidth_khz < MHZ_TO_KHZ(80)) 1265c7a6ee27SJohannes Berg bw_flags |= IEEE80211_CHAN_NO_80MHZ; 1266c7a6ee27SJohannes Berg if (freq_range->max_bandwidth_khz < MHZ_TO_KHZ(160)) 1267c7a6ee27SJohannes Berg bw_flags |= IEEE80211_CHAN_NO_160MHZ; 1268038659e7SLuis R. Rodriguez 1269038659e7SLuis R. Rodriguez chan->flags |= map_regdom_flags(reg_rule->flags) | bw_flags; 12701fa25e41SLuis R. Rodriguez chan->max_antenna_gain = (int) MBI_TO_DBI(power_rule->max_antenna_gain); 1271279f0f55SFelix Fietkau chan->max_reg_power = chan->max_power = 1272279f0f55SFelix Fietkau (int) MBM_TO_DBM(power_rule->max_eirp); 12731fa25e41SLuis R. Rodriguez } 12741fa25e41SLuis R. Rodriguez 1275fdc9d7b2SJohannes Berg static void handle_band_custom(struct wiphy *wiphy, 1276fdc9d7b2SJohannes Berg struct ieee80211_supported_band *sband, 12771fa25e41SLuis R. Rodriguez const struct ieee80211_regdomain *regd) 12781fa25e41SLuis R. Rodriguez { 12791fa25e41SLuis R. Rodriguez unsigned int i; 12801fa25e41SLuis R. Rodriguez 1281fdc9d7b2SJohannes Berg if (!sband) 1282fdc9d7b2SJohannes Berg return; 12831fa25e41SLuis R. Rodriguez 12841fa25e41SLuis R. Rodriguez for (i = 0; i < sband->n_channels; i++) 1285fdc9d7b2SJohannes Berg handle_channel_custom(wiphy, &sband->channels[i], regd); 12861fa25e41SLuis R. Rodriguez } 12871fa25e41SLuis R. Rodriguez 12881fa25e41SLuis R. Rodriguez /* Used by drivers prior to wiphy registration */ 12891fa25e41SLuis R. Rodriguez void wiphy_apply_custom_regulatory(struct wiphy *wiphy, 12901fa25e41SLuis R. Rodriguez const struct ieee80211_regdomain *regd) 12911fa25e41SLuis R. Rodriguez { 12921fa25e41SLuis R. Rodriguez enum ieee80211_band band; 1293bbcf3f02SLuis R. Rodriguez unsigned int bands_set = 0; 1294ac46d48eSLuis R. Rodriguez 12951fa25e41SLuis R. Rodriguez for (band = 0; band < IEEE80211_NUM_BANDS; band++) { 1296bbcf3f02SLuis R. Rodriguez if (!wiphy->bands[band]) 1297bbcf3f02SLuis R. Rodriguez continue; 1298fdc9d7b2SJohannes Berg handle_band_custom(wiphy, wiphy->bands[band], regd); 1299bbcf3f02SLuis R. Rodriguez bands_set++; 13001fa25e41SLuis R. Rodriguez } 1301bbcf3f02SLuis R. Rodriguez 1302bbcf3f02SLuis R. Rodriguez /* 1303bbcf3f02SLuis R. Rodriguez * no point in calling this if it won't have any effect 13041a919318SJohannes Berg * on your device's supported bands. 1305bbcf3f02SLuis R. Rodriguez */ 1306bbcf3f02SLuis R. Rodriguez WARN_ON(!bands_set); 13071fa25e41SLuis R. Rodriguez } 13081fa25e41SLuis R. Rodriguez EXPORT_SYMBOL(wiphy_apply_custom_regulatory); 13091fa25e41SLuis R. Rodriguez 131084fa4f43SJohannes Berg /* This has the logic which determines when a new request 131184fa4f43SJohannes Berg * should be ignored. */ 13122f92212bSJohannes Berg static enum reg_request_treatment 13132f92212bSJohannes Berg get_reg_request_treatment(struct wiphy *wiphy, 13142f92cd2eSLuis R. Rodriguez struct regulatory_request *pending_request) 131584fa4f43SJohannes Berg { 1316806a9e39SLuis R. Rodriguez struct wiphy *last_wiphy = NULL; 1317c492db37SJohannes Berg struct regulatory_request *lr = get_last_request(); 1318761cf7ecSLuis R. Rodriguez 131984fa4f43SJohannes Berg /* All initial requests are respected */ 1320c492db37SJohannes Berg if (!lr) 13212f92212bSJohannes Berg return REG_REQ_OK; 132284fa4f43SJohannes Berg 13232f92cd2eSLuis R. Rodriguez switch (pending_request->initiator) { 13247db90f4aSLuis R. Rodriguez case NL80211_REGDOM_SET_BY_CORE: 13252f92212bSJohannes Berg return REG_REQ_OK; 13267db90f4aSLuis R. Rodriguez case NL80211_REGDOM_SET_BY_COUNTRY_IE: 1327c492db37SJohannes Berg if (reg_request_cell_base(lr)) { 132857b5ce07SLuis R. Rodriguez /* Trust a Cell base station over the AP's country IE */ 132957b5ce07SLuis R. Rodriguez if (regdom_changes(pending_request->alpha2)) 13302f92212bSJohannes Berg return REG_REQ_IGNORE; 13312f92212bSJohannes Berg return REG_REQ_ALREADY_SET; 133257b5ce07SLuis R. Rodriguez } 133357b5ce07SLuis R. Rodriguez 1334c492db37SJohannes Berg last_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx); 1335806a9e39SLuis R. Rodriguez 13362f92cd2eSLuis R. Rodriguez if (unlikely(!is_an_alpha2(pending_request->alpha2))) 133784fa4f43SJohannes Berg return -EINVAL; 1338c492db37SJohannes Berg if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) { 1339806a9e39SLuis R. Rodriguez if (last_wiphy != wiphy) { 134084fa4f43SJohannes Berg /* 134184fa4f43SJohannes Berg * Two cards with two APs claiming different 13421fe90b03SThadeu Lima de Souza Cascardo * Country IE alpha2s. We could 134384fa4f43SJohannes Berg * intersect them, but that seems unlikely 134484fa4f43SJohannes Berg * to be correct. Reject second one for now. 134584fa4f43SJohannes Berg */ 13462f92cd2eSLuis R. Rodriguez if (regdom_changes(pending_request->alpha2)) 13472f92212bSJohannes Berg return REG_REQ_IGNORE; 13482f92212bSJohannes Berg return REG_REQ_ALREADY_SET; 134984fa4f43SJohannes Berg } 1350fb1fc7adSLuis R. Rodriguez /* 1351fb1fc7adSLuis R. Rodriguez * Two consecutive Country IE hints on the same wiphy. 1352fb1fc7adSLuis R. Rodriguez * This should be picked up early by the driver/stack 1353fb1fc7adSLuis R. Rodriguez */ 13542f92cd2eSLuis R. Rodriguez if (WARN_ON(regdom_changes(pending_request->alpha2))) 13552f92212bSJohannes Berg return REG_REQ_OK; 13562f92212bSJohannes Berg return REG_REQ_ALREADY_SET; 135784fa4f43SJohannes Berg } 13583430140aSJohannes Berg return REG_REQ_OK; 13597db90f4aSLuis R. Rodriguez case NL80211_REGDOM_SET_BY_DRIVER: 1360c492db37SJohannes Berg if (lr->initiator == NL80211_REGDOM_SET_BY_CORE) { 13612f92cd2eSLuis R. Rodriguez if (regdom_changes(pending_request->alpha2)) 13622f92212bSJohannes Berg return REG_REQ_OK; 13632f92212bSJohannes Berg return REG_REQ_ALREADY_SET; 1364e74b1e7fSLuis R. Rodriguez } 1365fff32c04SLuis R. Rodriguez 1366fff32c04SLuis R. Rodriguez /* 1367fff32c04SLuis R. Rodriguez * This would happen if you unplug and plug your card 1368fff32c04SLuis R. Rodriguez * back in or if you add a new device for which the previously 1369fff32c04SLuis R. Rodriguez * loaded card also agrees on the regulatory domain. 1370fff32c04SLuis R. Rodriguez */ 1371c492db37SJohannes Berg if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER && 13722f92cd2eSLuis R. Rodriguez !regdom_changes(pending_request->alpha2)) 13732f92212bSJohannes Berg return REG_REQ_ALREADY_SET; 1374fff32c04SLuis R. Rodriguez 13752f92212bSJohannes Berg return REG_REQ_INTERSECT; 13767db90f4aSLuis R. Rodriguez case NL80211_REGDOM_SET_BY_USER: 137757b5ce07SLuis R. Rodriguez if (reg_request_cell_base(pending_request)) 137857b5ce07SLuis R. Rodriguez return reg_ignore_cell_hint(pending_request); 137957b5ce07SLuis R. Rodriguez 1380c492db37SJohannes Berg if (reg_request_cell_base(lr)) 13812f92212bSJohannes Berg return REG_REQ_IGNORE; 138257b5ce07SLuis R. Rodriguez 1383c492db37SJohannes Berg if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) 13842f92212bSJohannes Berg return REG_REQ_INTERSECT; 1385fb1fc7adSLuis R. Rodriguez /* 1386fb1fc7adSLuis R. Rodriguez * If the user knows better the user should set the regdom 1387fb1fc7adSLuis R. Rodriguez * to their country before the IE is picked up 1388fb1fc7adSLuis R. Rodriguez */ 1389c492db37SJohannes Berg if (lr->initiator == NL80211_REGDOM_SET_BY_USER && 1390c492db37SJohannes Berg lr->intersect) 13912f92212bSJohannes Berg return REG_REQ_IGNORE; 1392fb1fc7adSLuis R. Rodriguez /* 1393fb1fc7adSLuis R. Rodriguez * Process user requests only after previous user/driver/core 1394fb1fc7adSLuis R. Rodriguez * requests have been processed 1395fb1fc7adSLuis R. Rodriguez */ 1396c492db37SJohannes Berg if ((lr->initiator == NL80211_REGDOM_SET_BY_CORE || 1397c492db37SJohannes Berg lr->initiator == NL80211_REGDOM_SET_BY_DRIVER || 1398c492db37SJohannes Berg lr->initiator == NL80211_REGDOM_SET_BY_USER) && 1399c492db37SJohannes Berg regdom_changes(lr->alpha2)) 14002f92212bSJohannes Berg return REG_REQ_IGNORE; 14015eebade6SLuis R. Rodriguez 1402baeb66feSJohn W. Linville if (!regdom_changes(pending_request->alpha2)) 14032f92212bSJohannes Berg return REG_REQ_ALREADY_SET; 1404e74b1e7fSLuis R. Rodriguez 14052f92212bSJohannes Berg return REG_REQ_OK; 140684fa4f43SJohannes Berg } 140784fa4f43SJohannes Berg 14082f92212bSJohannes Berg return REG_REQ_IGNORE; 140984fa4f43SJohannes Berg } 141084fa4f43SJohannes Berg 1411b2e253cfSLuis R. Rodriguez static void reg_set_request_processed(void) 1412b2e253cfSLuis R. Rodriguez { 1413b2e253cfSLuis R. Rodriguez bool need_more_processing = false; 1414c492db37SJohannes Berg struct regulatory_request *lr = get_last_request(); 1415b2e253cfSLuis R. Rodriguez 1416c492db37SJohannes Berg lr->processed = true; 1417b2e253cfSLuis R. Rodriguez 1418b2e253cfSLuis R. Rodriguez spin_lock(®_requests_lock); 1419b2e253cfSLuis R. Rodriguez if (!list_empty(®_requests_list)) 1420b2e253cfSLuis R. Rodriguez need_more_processing = true; 1421b2e253cfSLuis R. Rodriguez spin_unlock(®_requests_lock); 1422b2e253cfSLuis R. Rodriguez 1423c492db37SJohannes Berg if (lr->initiator == NL80211_REGDOM_SET_BY_USER) 1424fe20b39eSEliad Peller cancel_delayed_work(®_timeout); 1425a90c7a31SLuis R. Rodriguez 1426b2e253cfSLuis R. Rodriguez if (need_more_processing) 1427b2e253cfSLuis R. Rodriguez schedule_work(®_work); 1428b2e253cfSLuis R. Rodriguez } 1429b2e253cfSLuis R. Rodriguez 1430d1c96a9aSLuis R. Rodriguez /** 1431d1c96a9aSLuis R. Rodriguez * __regulatory_hint - hint to the wireless core a regulatory domain 1432d1c96a9aSLuis R. Rodriguez * @wiphy: if the hint comes from country information from an AP, this 1433d1c96a9aSLuis R. Rodriguez * is required to be set to the wiphy that received the information 143428da32d7SLuis R. Rodriguez * @pending_request: the regulatory request currently being processed 1435d1c96a9aSLuis R. Rodriguez * 1436d1c96a9aSLuis R. Rodriguez * The Wireless subsystem can use this function to hint to the wireless core 143728da32d7SLuis R. Rodriguez * what it believes should be the current regulatory domain. 1438d1c96a9aSLuis R. Rodriguez * 14392f92212bSJohannes Berg * Returns one of the different reg request treatment values. 1440d1c96a9aSLuis R. Rodriguez */ 14412f92212bSJohannes Berg static enum reg_request_treatment 14422f92212bSJohannes Berg __regulatory_hint(struct wiphy *wiphy, 144328da32d7SLuis R. Rodriguez struct regulatory_request *pending_request) 1444b2e1b302SLuis R. Rodriguez { 1445e9763c3cSJohannes Berg const struct ieee80211_regdomain *regd; 14469c96477dSLuis R. Rodriguez bool intersect = false; 14472f92212bSJohannes Berg enum reg_request_treatment treatment; 1448c492db37SJohannes Berg struct regulatory_request *lr; 1449b2e1b302SLuis R. Rodriguez 14502f92212bSJohannes Berg treatment = get_reg_request_treatment(wiphy, pending_request); 1451761cf7ecSLuis R. Rodriguez 14522f92212bSJohannes Berg switch (treatment) { 14532f92212bSJohannes Berg case REG_REQ_INTERSECT: 14547db90f4aSLuis R. Rodriguez if (pending_request->initiator == 14557db90f4aSLuis R. Rodriguez NL80211_REGDOM_SET_BY_DRIVER) { 1456458f4f9eSJohannes Berg regd = reg_copy_regd(get_cfg80211_regdom()); 1457e9763c3cSJohannes Berg if (IS_ERR(regd)) { 1458d951c1ddSLuis R. Rodriguez kfree(pending_request); 1459e9763c3cSJohannes Berg return PTR_ERR(regd); 14603e0c3ff3SLuis R. Rodriguez } 1461458f4f9eSJohannes Berg rcu_assign_pointer(wiphy->regd, regd); 1462d951c1ddSLuis R. Rodriguez } 14633e0c3ff3SLuis R. Rodriguez intersect = true; 14642f92212bSJohannes Berg break; 14652f92212bSJohannes Berg case REG_REQ_OK: 14662f92212bSJohannes Berg break; 14672f92212bSJohannes Berg default: 1468fb1fc7adSLuis R. Rodriguez /* 1469fb1fc7adSLuis R. Rodriguez * If the regulatory domain being requested by the 14703e0c3ff3SLuis R. Rodriguez * driver has already been set just copy it to the 1471fb1fc7adSLuis R. Rodriguez * wiphy 1472fb1fc7adSLuis R. Rodriguez */ 14732f92212bSJohannes Berg if (treatment == REG_REQ_ALREADY_SET && 14742f92212bSJohannes Berg pending_request->initiator == NL80211_REGDOM_SET_BY_DRIVER) { 1475458f4f9eSJohannes Berg regd = reg_copy_regd(get_cfg80211_regdom()); 1476e9763c3cSJohannes Berg if (IS_ERR(regd)) { 1477d951c1ddSLuis R. Rodriguez kfree(pending_request); 14782f92212bSJohannes Berg return REG_REQ_IGNORE; 1479d951c1ddSLuis R. Rodriguez } 14802f92212bSJohannes Berg treatment = REG_REQ_ALREADY_SET; 1481458f4f9eSJohannes Berg rcu_assign_pointer(wiphy->regd, regd); 14823e0c3ff3SLuis R. Rodriguez goto new_request; 14833e0c3ff3SLuis R. Rodriguez } 1484d951c1ddSLuis R. Rodriguez kfree(pending_request); 14852f92212bSJohannes Berg return treatment; 14863e0c3ff3SLuis R. Rodriguez } 1487b2e1b302SLuis R. Rodriguez 14883e0c3ff3SLuis R. Rodriguez new_request: 1489c492db37SJohannes Berg lr = get_last_request(); 1490c492db37SJohannes Berg if (lr != &core_request_world && lr) 1491c492db37SJohannes Berg kfree_rcu(lr, rcu_head); 1492d951c1ddSLuis R. Rodriguez 1493c492db37SJohannes Berg pending_request->intersect = intersect; 1494c492db37SJohannes Berg pending_request->processed = false; 1495c492db37SJohannes Berg rcu_assign_pointer(last_request, pending_request); 1496c492db37SJohannes Berg lr = pending_request; 1497d951c1ddSLuis R. Rodriguez 1498d951c1ddSLuis R. Rodriguez pending_request = NULL; 14993e0c3ff3SLuis R. Rodriguez 1500c492db37SJohannes Berg if (lr->initiator == NL80211_REGDOM_SET_BY_USER) { 1501c492db37SJohannes Berg user_alpha2[0] = lr->alpha2[0]; 1502c492db37SJohannes Berg user_alpha2[1] = lr->alpha2[1]; 150309d989d1SLuis R. Rodriguez } 150409d989d1SLuis R. Rodriguez 15052f92212bSJohannes Berg /* When r == REG_REQ_INTERSECT we do need to call CRDA */ 15062f92212bSJohannes Berg if (treatment != REG_REQ_OK && treatment != REG_REQ_INTERSECT) { 150773d54c9eSLuis R. Rodriguez /* 150873d54c9eSLuis R. Rodriguez * Since CRDA will not be called in this case as we already 150973d54c9eSLuis R. Rodriguez * have applied the requested regulatory domain before we just 151073d54c9eSLuis R. Rodriguez * inform userspace we have processed the request 151173d54c9eSLuis R. Rodriguez */ 15122f92212bSJohannes Berg if (treatment == REG_REQ_ALREADY_SET) { 1513c492db37SJohannes Berg nl80211_send_reg_change_event(lr); 1514b2e253cfSLuis R. Rodriguez reg_set_request_processed(); 1515b2e253cfSLuis R. Rodriguez } 15162f92212bSJohannes Berg return treatment; 151773d54c9eSLuis R. Rodriguez } 15183e0c3ff3SLuis R. Rodriguez 1519c492db37SJohannes Berg if (call_crda(lr->alpha2)) 15202f92212bSJohannes Berg return REG_REQ_IGNORE; 15212f92212bSJohannes Berg return REG_REQ_OK; 1522b2e1b302SLuis R. Rodriguez } 1523b2e1b302SLuis R. Rodriguez 152430a548c7SLuis R. Rodriguez /* This processes *all* regulatory hints */ 15258848bef0SLuis R. Rodriguez static void reg_process_hint(struct regulatory_request *reg_request, 15268848bef0SLuis R. Rodriguez enum nl80211_reg_initiator reg_initiator) 1527fe33eb39SLuis R. Rodriguez { 1528fe33eb39SLuis R. Rodriguez struct wiphy *wiphy = NULL; 1529fe33eb39SLuis R. Rodriguez 1530fdc9d7b2SJohannes Berg if (WARN_ON(!reg_request->alpha2)) 1531fdc9d7b2SJohannes Berg return; 1532fe33eb39SLuis R. Rodriguez 1533f4173766SJohannes Berg if (reg_request->wiphy_idx != WIPHY_IDX_INVALID) 1534fe33eb39SLuis R. Rodriguez wiphy = wiphy_idx_to_wiphy(reg_request->wiphy_idx); 1535fe33eb39SLuis R. Rodriguez 15361a919318SJohannes Berg if (reg_initiator == NL80211_REGDOM_SET_BY_DRIVER && !wiphy) { 1537d951c1ddSLuis R. Rodriguez kfree(reg_request); 1538b0e2880bSLuis R. Rodriguez return; 1539fe33eb39SLuis R. Rodriguez } 1540fe33eb39SLuis R. Rodriguez 15412f92212bSJohannes Berg switch (__regulatory_hint(wiphy, reg_request)) { 15422f92212bSJohannes Berg case REG_REQ_ALREADY_SET: 1543fe33eb39SLuis R. Rodriguez /* This is required so that the orig_* parameters are saved */ 15442f92212bSJohannes Berg if (wiphy && wiphy->flags & WIPHY_FLAG_STRICT_REGULATORY) 15458848bef0SLuis R. Rodriguez wiphy_update_regulatory(wiphy, reg_initiator); 15462f92212bSJohannes Berg break; 15472f92212bSJohannes Berg default: 15482f92212bSJohannes Berg if (reg_initiator == NL80211_REGDOM_SET_BY_USER) 15492f92212bSJohannes Berg schedule_delayed_work(®_timeout, 15502f92212bSJohannes Berg msecs_to_jiffies(3142)); 15512f92212bSJohannes Berg break; 1552a90c7a31SLuis R. Rodriguez } 1553fe33eb39SLuis R. Rodriguez } 1554fe33eb39SLuis R. Rodriguez 1555b2e253cfSLuis R. Rodriguez /* 1556b2e253cfSLuis R. Rodriguez * Processes regulatory hints, this is all the NL80211_REGDOM_SET_BY_* 1557b2e253cfSLuis R. Rodriguez * Regulatory hints come on a first come first serve basis and we 1558b2e253cfSLuis R. Rodriguez * must process each one atomically. 1559b2e253cfSLuis R. Rodriguez */ 1560fe33eb39SLuis R. Rodriguez static void reg_process_pending_hints(void) 1561fe33eb39SLuis R. Rodriguez { 1562c492db37SJohannes Berg struct regulatory_request *reg_request, *lr; 1563fe33eb39SLuis R. Rodriguez 1564c492db37SJohannes Berg lr = get_last_request(); 1565b0e2880bSLuis R. Rodriguez 1566b2e253cfSLuis R. Rodriguez /* When last_request->processed becomes true this will be rescheduled */ 1567c492db37SJohannes Berg if (lr && !lr->processed) { 15681a919318SJohannes Berg REG_DBG_PRINT("Pending regulatory request, waiting for it to be processed...\n"); 15695fe231e8SJohannes Berg return; 1570b2e253cfSLuis R. Rodriguez } 1571b2e253cfSLuis R. Rodriguez 1572fe33eb39SLuis R. Rodriguez spin_lock(®_requests_lock); 1573b2e253cfSLuis R. Rodriguez 1574b2e253cfSLuis R. Rodriguez if (list_empty(®_requests_list)) { 1575b2e253cfSLuis R. Rodriguez spin_unlock(®_requests_lock); 15765fe231e8SJohannes Berg return; 1577b2e253cfSLuis R. Rodriguez } 1578b2e253cfSLuis R. Rodriguez 1579fe33eb39SLuis R. Rodriguez reg_request = list_first_entry(®_requests_list, 1580fe33eb39SLuis R. Rodriguez struct regulatory_request, 1581fe33eb39SLuis R. Rodriguez list); 1582fe33eb39SLuis R. Rodriguez list_del_init(®_request->list); 1583fe33eb39SLuis R. Rodriguez 1584d951c1ddSLuis R. Rodriguez spin_unlock(®_requests_lock); 1585b0e2880bSLuis R. Rodriguez 15868848bef0SLuis R. Rodriguez reg_process_hint(reg_request, reg_request->initiator); 1587fe33eb39SLuis R. Rodriguez } 1588fe33eb39SLuis R. Rodriguez 1589e38f8a7aSLuis R. Rodriguez /* Processes beacon hints -- this has nothing to do with country IEs */ 1590e38f8a7aSLuis R. Rodriguez static void reg_process_pending_beacon_hints(void) 1591e38f8a7aSLuis R. Rodriguez { 159279c97e97SJohannes Berg struct cfg80211_registered_device *rdev; 1593e38f8a7aSLuis R. Rodriguez struct reg_beacon *pending_beacon, *tmp; 1594e38f8a7aSLuis R. Rodriguez 1595e38f8a7aSLuis R. Rodriguez /* This goes through the _pending_ beacon list */ 1596e38f8a7aSLuis R. Rodriguez spin_lock_bh(®_pending_beacons_lock); 1597e38f8a7aSLuis R. Rodriguez 1598e38f8a7aSLuis R. Rodriguez list_for_each_entry_safe(pending_beacon, tmp, 1599e38f8a7aSLuis R. Rodriguez ®_pending_beacons, list) { 1600e38f8a7aSLuis R. Rodriguez list_del_init(&pending_beacon->list); 1601e38f8a7aSLuis R. Rodriguez 1602e38f8a7aSLuis R. Rodriguez /* Applies the beacon hint to current wiphys */ 160379c97e97SJohannes Berg list_for_each_entry(rdev, &cfg80211_rdev_list, list) 160479c97e97SJohannes Berg wiphy_update_new_beacon(&rdev->wiphy, pending_beacon); 1605e38f8a7aSLuis R. Rodriguez 1606e38f8a7aSLuis R. Rodriguez /* Remembers the beacon hint for new wiphys or reg changes */ 1607e38f8a7aSLuis R. Rodriguez list_add_tail(&pending_beacon->list, ®_beacon_list); 1608e38f8a7aSLuis R. Rodriguez } 1609e38f8a7aSLuis R. Rodriguez 1610e38f8a7aSLuis R. Rodriguez spin_unlock_bh(®_pending_beacons_lock); 1611e38f8a7aSLuis R. Rodriguez } 1612e38f8a7aSLuis R. Rodriguez 1613fe33eb39SLuis R. Rodriguez static void reg_todo(struct work_struct *work) 1614fe33eb39SLuis R. Rodriguez { 16155fe231e8SJohannes Berg rtnl_lock(); 1616fe33eb39SLuis R. Rodriguez reg_process_pending_hints(); 1617e38f8a7aSLuis R. Rodriguez reg_process_pending_beacon_hints(); 16185fe231e8SJohannes Berg rtnl_unlock(); 1619fe33eb39SLuis R. Rodriguez } 1620fe33eb39SLuis R. Rodriguez 1621fe33eb39SLuis R. Rodriguez static void queue_regulatory_request(struct regulatory_request *request) 1622fe33eb39SLuis R. Rodriguez { 1623c61029c7SJohn W. Linville request->alpha2[0] = toupper(request->alpha2[0]); 1624c61029c7SJohn W. Linville request->alpha2[1] = toupper(request->alpha2[1]); 1625c61029c7SJohn W. Linville 1626fe33eb39SLuis R. Rodriguez spin_lock(®_requests_lock); 1627fe33eb39SLuis R. Rodriguez list_add_tail(&request->list, ®_requests_list); 1628fe33eb39SLuis R. Rodriguez spin_unlock(®_requests_lock); 1629fe33eb39SLuis R. Rodriguez 1630fe33eb39SLuis R. Rodriguez schedule_work(®_work); 1631fe33eb39SLuis R. Rodriguez } 1632fe33eb39SLuis R. Rodriguez 163309d989d1SLuis R. Rodriguez /* 163409d989d1SLuis R. Rodriguez * Core regulatory hint -- happens during cfg80211_init() 163509d989d1SLuis R. Rodriguez * and when we restore regulatory settings. 163609d989d1SLuis R. Rodriguez */ 1637ba25c141SLuis R. Rodriguez static int regulatory_hint_core(const char *alpha2) 1638ba25c141SLuis R. Rodriguez { 1639ba25c141SLuis R. Rodriguez struct regulatory_request *request; 1640ba25c141SLuis R. Rodriguez 16411a919318SJohannes Berg request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); 1642ba25c141SLuis R. Rodriguez if (!request) 1643ba25c141SLuis R. Rodriguez return -ENOMEM; 1644ba25c141SLuis R. Rodriguez 1645ba25c141SLuis R. Rodriguez request->alpha2[0] = alpha2[0]; 1646ba25c141SLuis R. Rodriguez request->alpha2[1] = alpha2[1]; 16477db90f4aSLuis R. Rodriguez request->initiator = NL80211_REGDOM_SET_BY_CORE; 1648ba25c141SLuis R. Rodriguez 164931e99729SLuis R. Rodriguez queue_regulatory_request(request); 16505078b2e3SLuis R. Rodriguez 1651fe33eb39SLuis R. Rodriguez return 0; 1652ba25c141SLuis R. Rodriguez } 1653ba25c141SLuis R. Rodriguez 1654fe33eb39SLuis R. Rodriguez /* User hints */ 165557b5ce07SLuis R. Rodriguez int regulatory_hint_user(const char *alpha2, 165657b5ce07SLuis R. Rodriguez enum nl80211_user_reg_hint_type user_reg_hint_type) 1657b2e1b302SLuis R. Rodriguez { 1658fe33eb39SLuis R. Rodriguez struct regulatory_request *request; 1659fe33eb39SLuis R. Rodriguez 1660fdc9d7b2SJohannes Berg if (WARN_ON(!alpha2)) 1661fdc9d7b2SJohannes Berg return -EINVAL; 1662b2e1b302SLuis R. Rodriguez 1663fe33eb39SLuis R. Rodriguez request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); 1664fe33eb39SLuis R. Rodriguez if (!request) 1665fe33eb39SLuis R. Rodriguez return -ENOMEM; 1666fe33eb39SLuis R. Rodriguez 1667f4173766SJohannes Berg request->wiphy_idx = WIPHY_IDX_INVALID; 1668fe33eb39SLuis R. Rodriguez request->alpha2[0] = alpha2[0]; 1669fe33eb39SLuis R. Rodriguez request->alpha2[1] = alpha2[1]; 1670e12822e1SLuis R. Rodriguez request->initiator = NL80211_REGDOM_SET_BY_USER; 167157b5ce07SLuis R. Rodriguez request->user_reg_hint_type = user_reg_hint_type; 1672fe33eb39SLuis R. Rodriguez 1673fe33eb39SLuis R. Rodriguez queue_regulatory_request(request); 1674fe33eb39SLuis R. Rodriguez 1675fe33eb39SLuis R. Rodriguez return 0; 1676fe33eb39SLuis R. Rodriguez } 1677fe33eb39SLuis R. Rodriguez 1678fe33eb39SLuis R. Rodriguez /* Driver hints */ 1679fe33eb39SLuis R. Rodriguez int regulatory_hint(struct wiphy *wiphy, const char *alpha2) 1680fe33eb39SLuis R. Rodriguez { 1681fe33eb39SLuis R. Rodriguez struct regulatory_request *request; 1682fe33eb39SLuis R. Rodriguez 1683fdc9d7b2SJohannes Berg if (WARN_ON(!alpha2 || !wiphy)) 1684fdc9d7b2SJohannes Berg return -EINVAL; 1685fe33eb39SLuis R. Rodriguez 1686fe33eb39SLuis R. Rodriguez request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); 1687fe33eb39SLuis R. Rodriguez if (!request) 1688fe33eb39SLuis R. Rodriguez return -ENOMEM; 1689fe33eb39SLuis R. Rodriguez 1690fe33eb39SLuis R. Rodriguez request->wiphy_idx = get_wiphy_idx(wiphy); 1691fe33eb39SLuis R. Rodriguez 1692fe33eb39SLuis R. Rodriguez request->alpha2[0] = alpha2[0]; 1693fe33eb39SLuis R. Rodriguez request->alpha2[1] = alpha2[1]; 16947db90f4aSLuis R. Rodriguez request->initiator = NL80211_REGDOM_SET_BY_DRIVER; 1695fe33eb39SLuis R. Rodriguez 1696fe33eb39SLuis R. Rodriguez queue_regulatory_request(request); 1697fe33eb39SLuis R. Rodriguez 1698fe33eb39SLuis R. Rodriguez return 0; 1699b2e1b302SLuis R. Rodriguez } 1700b2e1b302SLuis R. Rodriguez EXPORT_SYMBOL(regulatory_hint); 1701b2e1b302SLuis R. Rodriguez 1702789fd033SLuis R. Rodriguez void regulatory_hint_country_ie(struct wiphy *wiphy, enum ieee80211_band band, 17031a919318SJohannes Berg const u8 *country_ie, u8 country_ie_len) 17043f2355cbSLuis R. Rodriguez { 17053f2355cbSLuis R. Rodriguez char alpha2[2]; 17063f2355cbSLuis R. Rodriguez enum environment_cap env = ENVIRON_ANY; 1707db2424c5SJohannes Berg struct regulatory_request *request = NULL, *lr; 1708d335fe63SLuis R. Rodriguez 17093f2355cbSLuis R. Rodriguez /* IE len must be evenly divisible by 2 */ 17103f2355cbSLuis R. Rodriguez if (country_ie_len & 0x01) 1711db2424c5SJohannes Berg return; 17123f2355cbSLuis R. Rodriguez 17133f2355cbSLuis R. Rodriguez if (country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN) 1714db2424c5SJohannes Berg return; 1715db2424c5SJohannes Berg 1716db2424c5SJohannes Berg request = kzalloc(sizeof(*request), GFP_KERNEL); 1717db2424c5SJohannes Berg if (!request) 1718db2424c5SJohannes Berg return; 17193f2355cbSLuis R. Rodriguez 17203f2355cbSLuis R. Rodriguez alpha2[0] = country_ie[0]; 17213f2355cbSLuis R. Rodriguez alpha2[1] = country_ie[1]; 17223f2355cbSLuis R. Rodriguez 17233f2355cbSLuis R. Rodriguez if (country_ie[2] == 'I') 17243f2355cbSLuis R. Rodriguez env = ENVIRON_INDOOR; 17253f2355cbSLuis R. Rodriguez else if (country_ie[2] == 'O') 17263f2355cbSLuis R. Rodriguez env = ENVIRON_OUTDOOR; 17273f2355cbSLuis R. Rodriguez 1728db2424c5SJohannes Berg rcu_read_lock(); 1729db2424c5SJohannes Berg lr = get_last_request(); 1730db2424c5SJohannes Berg 1731db2424c5SJohannes Berg if (unlikely(!lr)) 1732db2424c5SJohannes Berg goto out; 1733db2424c5SJohannes Berg 1734fb1fc7adSLuis R. Rodriguez /* 17358b19e6caSLuis R. Rodriguez * We will run this only upon a successful connection on cfg80211. 17364b44c8bcSLuis R. Rodriguez * We leave conflict resolution to the workqueue, where can hold 17375fe231e8SJohannes Berg * the RTNL. 1738fb1fc7adSLuis R. Rodriguez */ 1739c492db37SJohannes Berg if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE && 1740c492db37SJohannes Berg lr->wiphy_idx != WIPHY_IDX_INVALID) 17413f2355cbSLuis R. Rodriguez goto out; 17423f2355cbSLuis R. Rodriguez 1743fe33eb39SLuis R. Rodriguez request->wiphy_idx = get_wiphy_idx(wiphy); 17444f366c5dSJohn W. Linville request->alpha2[0] = alpha2[0]; 17454f366c5dSJohn W. Linville request->alpha2[1] = alpha2[1]; 17467db90f4aSLuis R. Rodriguez request->initiator = NL80211_REGDOM_SET_BY_COUNTRY_IE; 1747fe33eb39SLuis R. Rodriguez request->country_ie_env = env; 17483f2355cbSLuis R. Rodriguez 1749fe33eb39SLuis R. Rodriguez queue_regulatory_request(request); 1750db2424c5SJohannes Berg request = NULL; 17513f2355cbSLuis R. Rodriguez out: 1752db2424c5SJohannes Berg kfree(request); 1753db2424c5SJohannes Berg rcu_read_unlock(); 17543f2355cbSLuis R. Rodriguez } 1755b2e1b302SLuis R. Rodriguez 175609d989d1SLuis R. Rodriguez static void restore_alpha2(char *alpha2, bool reset_user) 175709d989d1SLuis R. Rodriguez { 175809d989d1SLuis R. Rodriguez /* indicates there is no alpha2 to consider for restoration */ 175909d989d1SLuis R. Rodriguez alpha2[0] = '9'; 176009d989d1SLuis R. Rodriguez alpha2[1] = '7'; 176109d989d1SLuis R. Rodriguez 176209d989d1SLuis R. Rodriguez /* The user setting has precedence over the module parameter */ 176309d989d1SLuis R. Rodriguez if (is_user_regdom_saved()) { 176409d989d1SLuis R. Rodriguez /* Unless we're asked to ignore it and reset it */ 176509d989d1SLuis R. Rodriguez if (reset_user) { 17661a919318SJohannes Berg REG_DBG_PRINT("Restoring regulatory settings including user preference\n"); 176709d989d1SLuis R. Rodriguez user_alpha2[0] = '9'; 176809d989d1SLuis R. Rodriguez user_alpha2[1] = '7'; 176909d989d1SLuis R. Rodriguez 177009d989d1SLuis R. Rodriguez /* 177109d989d1SLuis R. Rodriguez * If we're ignoring user settings, we still need to 177209d989d1SLuis R. Rodriguez * check the module parameter to ensure we put things 177309d989d1SLuis R. Rodriguez * back as they were for a full restore. 177409d989d1SLuis R. Rodriguez */ 177509d989d1SLuis R. Rodriguez if (!is_world_regdom(ieee80211_regdom)) { 17761a919318SJohannes Berg REG_DBG_PRINT("Keeping preference on module parameter ieee80211_regdom: %c%c\n", 17771a919318SJohannes Berg ieee80211_regdom[0], ieee80211_regdom[1]); 177809d989d1SLuis R. Rodriguez alpha2[0] = ieee80211_regdom[0]; 177909d989d1SLuis R. Rodriguez alpha2[1] = ieee80211_regdom[1]; 178009d989d1SLuis R. Rodriguez } 178109d989d1SLuis R. Rodriguez } else { 17821a919318SJohannes Berg REG_DBG_PRINT("Restoring regulatory settings while preserving user preference for: %c%c\n", 17831a919318SJohannes Berg user_alpha2[0], user_alpha2[1]); 178409d989d1SLuis R. Rodriguez alpha2[0] = user_alpha2[0]; 178509d989d1SLuis R. Rodriguez alpha2[1] = user_alpha2[1]; 178609d989d1SLuis R. Rodriguez } 178709d989d1SLuis R. Rodriguez } else if (!is_world_regdom(ieee80211_regdom)) { 17881a919318SJohannes Berg REG_DBG_PRINT("Keeping preference on module parameter ieee80211_regdom: %c%c\n", 17891a919318SJohannes Berg ieee80211_regdom[0], ieee80211_regdom[1]); 179009d989d1SLuis R. Rodriguez alpha2[0] = ieee80211_regdom[0]; 179109d989d1SLuis R. Rodriguez alpha2[1] = ieee80211_regdom[1]; 179209d989d1SLuis R. Rodriguez } else 1793d91e41b6SLuis R. Rodriguez REG_DBG_PRINT("Restoring regulatory settings\n"); 179409d989d1SLuis R. Rodriguez } 179509d989d1SLuis R. Rodriguez 17965ce543d1SRajkumar Manoharan static void restore_custom_reg_settings(struct wiphy *wiphy) 17975ce543d1SRajkumar Manoharan { 17985ce543d1SRajkumar Manoharan struct ieee80211_supported_band *sband; 17995ce543d1SRajkumar Manoharan enum ieee80211_band band; 18005ce543d1SRajkumar Manoharan struct ieee80211_channel *chan; 18015ce543d1SRajkumar Manoharan int i; 18025ce543d1SRajkumar Manoharan 18035ce543d1SRajkumar Manoharan for (band = 0; band < IEEE80211_NUM_BANDS; band++) { 18045ce543d1SRajkumar Manoharan sband = wiphy->bands[band]; 18055ce543d1SRajkumar Manoharan if (!sband) 18065ce543d1SRajkumar Manoharan continue; 18075ce543d1SRajkumar Manoharan for (i = 0; i < sband->n_channels; i++) { 18085ce543d1SRajkumar Manoharan chan = &sband->channels[i]; 18095ce543d1SRajkumar Manoharan chan->flags = chan->orig_flags; 18105ce543d1SRajkumar Manoharan chan->max_antenna_gain = chan->orig_mag; 18115ce543d1SRajkumar Manoharan chan->max_power = chan->orig_mpwr; 1812899852afSPaul Stewart chan->beacon_found = false; 18135ce543d1SRajkumar Manoharan } 18145ce543d1SRajkumar Manoharan } 18155ce543d1SRajkumar Manoharan } 18165ce543d1SRajkumar Manoharan 181709d989d1SLuis R. Rodriguez /* 181809d989d1SLuis R. Rodriguez * Restoring regulatory settings involves ingoring any 181909d989d1SLuis R. Rodriguez * possibly stale country IE information and user regulatory 182009d989d1SLuis R. Rodriguez * settings if so desired, this includes any beacon hints 182109d989d1SLuis R. Rodriguez * learned as we could have traveled outside to another country 182209d989d1SLuis R. Rodriguez * after disconnection. To restore regulatory settings we do 182309d989d1SLuis R. Rodriguez * exactly what we did at bootup: 182409d989d1SLuis R. Rodriguez * 182509d989d1SLuis R. Rodriguez * - send a core regulatory hint 182609d989d1SLuis R. Rodriguez * - send a user regulatory hint if applicable 182709d989d1SLuis R. Rodriguez * 182809d989d1SLuis R. Rodriguez * Device drivers that send a regulatory hint for a specific country 182909d989d1SLuis R. Rodriguez * keep their own regulatory domain on wiphy->regd so that does does 183009d989d1SLuis R. Rodriguez * not need to be remembered. 183109d989d1SLuis R. Rodriguez */ 183209d989d1SLuis R. Rodriguez static void restore_regulatory_settings(bool reset_user) 183309d989d1SLuis R. Rodriguez { 183409d989d1SLuis R. Rodriguez char alpha2[2]; 1835cee0bec5SDmitry Shmidt char world_alpha2[2]; 183609d989d1SLuis R. Rodriguez struct reg_beacon *reg_beacon, *btmp; 183714609555SLuis R. Rodriguez struct regulatory_request *reg_request, *tmp; 183814609555SLuis R. Rodriguez LIST_HEAD(tmp_reg_req_list); 18395ce543d1SRajkumar Manoharan struct cfg80211_registered_device *rdev; 184009d989d1SLuis R. Rodriguez 18415fe231e8SJohannes Berg ASSERT_RTNL(); 18425fe231e8SJohannes Berg 18432d319867SJohannes Berg reset_regdomains(true, &world_regdom); 184409d989d1SLuis R. Rodriguez restore_alpha2(alpha2, reset_user); 184509d989d1SLuis R. Rodriguez 184614609555SLuis R. Rodriguez /* 184714609555SLuis R. Rodriguez * If there's any pending requests we simply 184814609555SLuis R. Rodriguez * stash them to a temporary pending queue and 184914609555SLuis R. Rodriguez * add then after we've restored regulatory 185014609555SLuis R. Rodriguez * settings. 185114609555SLuis R. Rodriguez */ 185214609555SLuis R. Rodriguez spin_lock(®_requests_lock); 1853fea9bcedSJohannes Berg list_for_each_entry_safe(reg_request, tmp, ®_requests_list, list) { 1854fea9bcedSJohannes Berg if (reg_request->initiator != NL80211_REGDOM_SET_BY_USER) 185514609555SLuis R. Rodriguez continue; 185600a9ac4cSWei Yongjun list_move_tail(®_request->list, &tmp_reg_req_list); 185714609555SLuis R. Rodriguez } 185814609555SLuis R. Rodriguez spin_unlock(®_requests_lock); 185914609555SLuis R. Rodriguez 186009d989d1SLuis R. Rodriguez /* Clear beacon hints */ 186109d989d1SLuis R. Rodriguez spin_lock_bh(®_pending_beacons_lock); 1862fea9bcedSJohannes Berg list_for_each_entry_safe(reg_beacon, btmp, ®_pending_beacons, list) { 186309d989d1SLuis R. Rodriguez list_del(®_beacon->list); 186409d989d1SLuis R. Rodriguez kfree(reg_beacon); 186509d989d1SLuis R. Rodriguez } 186609d989d1SLuis R. Rodriguez spin_unlock_bh(®_pending_beacons_lock); 186709d989d1SLuis R. Rodriguez 1868fea9bcedSJohannes Berg list_for_each_entry_safe(reg_beacon, btmp, ®_beacon_list, list) { 186909d989d1SLuis R. Rodriguez list_del(®_beacon->list); 187009d989d1SLuis R. Rodriguez kfree(reg_beacon); 187109d989d1SLuis R. Rodriguez } 187209d989d1SLuis R. Rodriguez 187309d989d1SLuis R. Rodriguez /* First restore to the basic regulatory settings */ 1874379b82f4SJohannes Berg world_alpha2[0] = cfg80211_world_regdom->alpha2[0]; 1875379b82f4SJohannes Berg world_alpha2[1] = cfg80211_world_regdom->alpha2[1]; 187609d989d1SLuis R. Rodriguez 18775ce543d1SRajkumar Manoharan list_for_each_entry(rdev, &cfg80211_rdev_list, list) { 18785ce543d1SRajkumar Manoharan if (rdev->wiphy.flags & WIPHY_FLAG_CUSTOM_REGULATORY) 18795ce543d1SRajkumar Manoharan restore_custom_reg_settings(&rdev->wiphy); 18805ce543d1SRajkumar Manoharan } 18815ce543d1SRajkumar Manoharan 1882cee0bec5SDmitry Shmidt regulatory_hint_core(world_alpha2); 188309d989d1SLuis R. Rodriguez 188409d989d1SLuis R. Rodriguez /* 188509d989d1SLuis R. Rodriguez * This restores the ieee80211_regdom module parameter 188609d989d1SLuis R. Rodriguez * preference or the last user requested regulatory 188709d989d1SLuis R. Rodriguez * settings, user regulatory settings takes precedence. 188809d989d1SLuis R. Rodriguez */ 188909d989d1SLuis R. Rodriguez if (is_an_alpha2(alpha2)) 189057b5ce07SLuis R. Rodriguez regulatory_hint_user(user_alpha2, NL80211_USER_REG_HINT_USER); 189109d989d1SLuis R. Rodriguez 189214609555SLuis R. Rodriguez spin_lock(®_requests_lock); 189311cff96cSJohannes Berg list_splice_tail_init(&tmp_reg_req_list, ®_requests_list); 189414609555SLuis R. Rodriguez spin_unlock(®_requests_lock); 189514609555SLuis R. Rodriguez 189614609555SLuis R. Rodriguez REG_DBG_PRINT("Kicking the queue\n"); 189714609555SLuis R. Rodriguez 189814609555SLuis R. Rodriguez schedule_work(®_work); 189914609555SLuis R. Rodriguez } 190009d989d1SLuis R. Rodriguez 190109d989d1SLuis R. Rodriguez void regulatory_hint_disconnect(void) 190209d989d1SLuis R. Rodriguez { 19031a919318SJohannes Berg REG_DBG_PRINT("All devices are disconnected, going to restore regulatory settings\n"); 190409d989d1SLuis R. Rodriguez restore_regulatory_settings(false); 190509d989d1SLuis R. Rodriguez } 190609d989d1SLuis R. Rodriguez 1907e38f8a7aSLuis R. Rodriguez static bool freq_is_chan_12_13_14(u16 freq) 1908e38f8a7aSLuis R. Rodriguez { 190959eb21a6SBruno Randolf if (freq == ieee80211_channel_to_frequency(12, IEEE80211_BAND_2GHZ) || 191059eb21a6SBruno Randolf freq == ieee80211_channel_to_frequency(13, IEEE80211_BAND_2GHZ) || 191159eb21a6SBruno Randolf freq == ieee80211_channel_to_frequency(14, IEEE80211_BAND_2GHZ)) 1912e38f8a7aSLuis R. Rodriguez return true; 1913e38f8a7aSLuis R. Rodriguez return false; 1914e38f8a7aSLuis R. Rodriguez } 1915e38f8a7aSLuis R. Rodriguez 19163ebfa6e7SLuis R. Rodriguez static bool pending_reg_beacon(struct ieee80211_channel *beacon_chan) 19173ebfa6e7SLuis R. Rodriguez { 19183ebfa6e7SLuis R. Rodriguez struct reg_beacon *pending_beacon; 19193ebfa6e7SLuis R. Rodriguez 19203ebfa6e7SLuis R. Rodriguez list_for_each_entry(pending_beacon, ®_pending_beacons, list) 19213ebfa6e7SLuis R. Rodriguez if (beacon_chan->center_freq == 19223ebfa6e7SLuis R. Rodriguez pending_beacon->chan.center_freq) 19233ebfa6e7SLuis R. Rodriguez return true; 19243ebfa6e7SLuis R. Rodriguez return false; 19253ebfa6e7SLuis R. Rodriguez } 19263ebfa6e7SLuis R. Rodriguez 1927e38f8a7aSLuis R. Rodriguez int regulatory_hint_found_beacon(struct wiphy *wiphy, 1928e38f8a7aSLuis R. Rodriguez struct ieee80211_channel *beacon_chan, 1929e38f8a7aSLuis R. Rodriguez gfp_t gfp) 1930e38f8a7aSLuis R. Rodriguez { 1931e38f8a7aSLuis R. Rodriguez struct reg_beacon *reg_beacon; 19323ebfa6e7SLuis R. Rodriguez bool processing; 1933e38f8a7aSLuis R. Rodriguez 19341a919318SJohannes Berg if (beacon_chan->beacon_found || 19351a919318SJohannes Berg beacon_chan->flags & IEEE80211_CHAN_RADAR || 1936e38f8a7aSLuis R. Rodriguez (beacon_chan->band == IEEE80211_BAND_2GHZ && 19371a919318SJohannes Berg !freq_is_chan_12_13_14(beacon_chan->center_freq))) 1938e38f8a7aSLuis R. Rodriguez return 0; 1939e38f8a7aSLuis R. Rodriguez 19403ebfa6e7SLuis R. Rodriguez spin_lock_bh(®_pending_beacons_lock); 19413ebfa6e7SLuis R. Rodriguez processing = pending_reg_beacon(beacon_chan); 19423ebfa6e7SLuis R. Rodriguez spin_unlock_bh(®_pending_beacons_lock); 19433ebfa6e7SLuis R. Rodriguez 19443ebfa6e7SLuis R. Rodriguez if (processing) 1945e38f8a7aSLuis R. Rodriguez return 0; 1946e38f8a7aSLuis R. Rodriguez 1947e38f8a7aSLuis R. Rodriguez reg_beacon = kzalloc(sizeof(struct reg_beacon), gfp); 1948e38f8a7aSLuis R. Rodriguez if (!reg_beacon) 1949e38f8a7aSLuis R. Rodriguez return -ENOMEM; 1950e38f8a7aSLuis R. Rodriguez 19511a919318SJohannes Berg REG_DBG_PRINT("Found new beacon on frequency: %d MHz (Ch %d) on %s\n", 1952e38f8a7aSLuis R. Rodriguez beacon_chan->center_freq, 1953e38f8a7aSLuis R. Rodriguez ieee80211_frequency_to_channel(beacon_chan->center_freq), 1954e38f8a7aSLuis R. Rodriguez wiphy_name(wiphy)); 19554113f751SLuis R. Rodriguez 1956e38f8a7aSLuis R. Rodriguez memcpy(®_beacon->chan, beacon_chan, 1957e38f8a7aSLuis R. Rodriguez sizeof(struct ieee80211_channel)); 1958e38f8a7aSLuis R. Rodriguez 1959e38f8a7aSLuis R. Rodriguez /* 1960e38f8a7aSLuis R. Rodriguez * Since we can be called from BH or and non-BH context 1961e38f8a7aSLuis R. Rodriguez * we must use spin_lock_bh() 1962e38f8a7aSLuis R. Rodriguez */ 1963e38f8a7aSLuis R. Rodriguez spin_lock_bh(®_pending_beacons_lock); 1964e38f8a7aSLuis R. Rodriguez list_add_tail(®_beacon->list, ®_pending_beacons); 1965e38f8a7aSLuis R. Rodriguez spin_unlock_bh(®_pending_beacons_lock); 1966e38f8a7aSLuis R. Rodriguez 1967e38f8a7aSLuis R. Rodriguez schedule_work(®_work); 1968e38f8a7aSLuis R. Rodriguez 1969e38f8a7aSLuis R. Rodriguez return 0; 1970e38f8a7aSLuis R. Rodriguez } 1971e38f8a7aSLuis R. Rodriguez 1972a3d2eaf0SJohannes Berg static void print_rd_rules(const struct ieee80211_regdomain *rd) 1973b2e1b302SLuis R. Rodriguez { 1974b2e1b302SLuis R. Rodriguez unsigned int i; 1975a3d2eaf0SJohannes Berg const struct ieee80211_reg_rule *reg_rule = NULL; 1976a3d2eaf0SJohannes Berg const struct ieee80211_freq_range *freq_range = NULL; 1977a3d2eaf0SJohannes Berg const struct ieee80211_power_rule *power_rule = NULL; 1978b2e1b302SLuis R. Rodriguez 1979e9c0268fSJoe Perches pr_info(" (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)\n"); 1980b2e1b302SLuis R. Rodriguez 1981b2e1b302SLuis R. Rodriguez for (i = 0; i < rd->n_reg_rules; i++) { 1982b2e1b302SLuis R. Rodriguez reg_rule = &rd->reg_rules[i]; 1983b2e1b302SLuis R. Rodriguez freq_range = ®_rule->freq_range; 1984b2e1b302SLuis R. Rodriguez power_rule = ®_rule->power_rule; 1985b2e1b302SLuis R. Rodriguez 1986fb1fc7adSLuis R. Rodriguez /* 1987fb1fc7adSLuis R. Rodriguez * There may not be documentation for max antenna gain 1988fb1fc7adSLuis R. Rodriguez * in certain regions 1989fb1fc7adSLuis R. Rodriguez */ 1990b2e1b302SLuis R. Rodriguez if (power_rule->max_antenna_gain) 1991e9c0268fSJoe Perches pr_info(" (%d KHz - %d KHz @ %d KHz), (%d mBi, %d mBm)\n", 1992b2e1b302SLuis R. Rodriguez freq_range->start_freq_khz, 1993b2e1b302SLuis R. Rodriguez freq_range->end_freq_khz, 1994b2e1b302SLuis R. Rodriguez freq_range->max_bandwidth_khz, 1995b2e1b302SLuis R. Rodriguez power_rule->max_antenna_gain, 1996b2e1b302SLuis R. Rodriguez power_rule->max_eirp); 1997b2e1b302SLuis R. Rodriguez else 1998e9c0268fSJoe Perches pr_info(" (%d KHz - %d KHz @ %d KHz), (N/A, %d mBm)\n", 1999b2e1b302SLuis R. Rodriguez freq_range->start_freq_khz, 2000b2e1b302SLuis R. Rodriguez freq_range->end_freq_khz, 2001b2e1b302SLuis R. Rodriguez freq_range->max_bandwidth_khz, 2002b2e1b302SLuis R. Rodriguez power_rule->max_eirp); 2003b2e1b302SLuis R. Rodriguez } 2004b2e1b302SLuis R. Rodriguez } 2005b2e1b302SLuis R. Rodriguez 20068b60b078SLuis R. Rodriguez bool reg_supported_dfs_region(u8 dfs_region) 20078b60b078SLuis R. Rodriguez { 20088b60b078SLuis R. Rodriguez switch (dfs_region) { 20098b60b078SLuis R. Rodriguez case NL80211_DFS_UNSET: 20108b60b078SLuis R. Rodriguez case NL80211_DFS_FCC: 20118b60b078SLuis R. Rodriguez case NL80211_DFS_ETSI: 20128b60b078SLuis R. Rodriguez case NL80211_DFS_JP: 20138b60b078SLuis R. Rodriguez return true; 20148b60b078SLuis R. Rodriguez default: 20158b60b078SLuis R. Rodriguez REG_DBG_PRINT("Ignoring uknown DFS master region: %d\n", 20168b60b078SLuis R. Rodriguez dfs_region); 20178b60b078SLuis R. Rodriguez return false; 20188b60b078SLuis R. Rodriguez } 20198b60b078SLuis R. Rodriguez } 20208b60b078SLuis R. Rodriguez 20218b60b078SLuis R. Rodriguez static void print_dfs_region(u8 dfs_region) 20228b60b078SLuis R. Rodriguez { 20238b60b078SLuis R. Rodriguez if (!dfs_region) 20248b60b078SLuis R. Rodriguez return; 20258b60b078SLuis R. Rodriguez 20268b60b078SLuis R. Rodriguez switch (dfs_region) { 20278b60b078SLuis R. Rodriguez case NL80211_DFS_FCC: 20288b60b078SLuis R. Rodriguez pr_info(" DFS Master region FCC"); 20298b60b078SLuis R. Rodriguez break; 20308b60b078SLuis R. Rodriguez case NL80211_DFS_ETSI: 20318b60b078SLuis R. Rodriguez pr_info(" DFS Master region ETSI"); 20328b60b078SLuis R. Rodriguez break; 20338b60b078SLuis R. Rodriguez case NL80211_DFS_JP: 20348b60b078SLuis R. Rodriguez pr_info(" DFS Master region JP"); 20358b60b078SLuis R. Rodriguez break; 20368b60b078SLuis R. Rodriguez default: 20371a919318SJohannes Berg pr_info(" DFS Master region Unknown"); 20388b60b078SLuis R. Rodriguez break; 20398b60b078SLuis R. Rodriguez } 20408b60b078SLuis R. Rodriguez } 20418b60b078SLuis R. Rodriguez 2042a3d2eaf0SJohannes Berg static void print_regdomain(const struct ieee80211_regdomain *rd) 2043b2e1b302SLuis R. Rodriguez { 2044c492db37SJohannes Berg struct regulatory_request *lr = get_last_request(); 2045b2e1b302SLuis R. Rodriguez 20463f2355cbSLuis R. Rodriguez if (is_intersected_alpha2(rd->alpha2)) { 2047c492db37SJohannes Berg if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) { 204879c97e97SJohannes Berg struct cfg80211_registered_device *rdev; 2049c492db37SJohannes Berg rdev = cfg80211_rdev_by_wiphy_idx(lr->wiphy_idx); 205079c97e97SJohannes Berg if (rdev) { 2051e9c0268fSJoe Perches pr_info("Current regulatory domain updated by AP to: %c%c\n", 205279c97e97SJohannes Berg rdev->country_ie_alpha2[0], 205379c97e97SJohannes Berg rdev->country_ie_alpha2[1]); 20543f2355cbSLuis R. Rodriguez } else 2055e9c0268fSJoe Perches pr_info("Current regulatory domain intersected:\n"); 20563f2355cbSLuis R. Rodriguez } else 2057e9c0268fSJoe Perches pr_info("Current regulatory domain intersected:\n"); 20581a919318SJohannes Berg } else if (is_world_regdom(rd->alpha2)) { 2059e9c0268fSJoe Perches pr_info("World regulatory domain updated:\n"); 20601a919318SJohannes Berg } else { 2061b2e1b302SLuis R. Rodriguez if (is_unknown_alpha2(rd->alpha2)) 2062e9c0268fSJoe Perches pr_info("Regulatory domain changed to driver built-in settings (unknown country)\n"); 206357b5ce07SLuis R. Rodriguez else { 2064c492db37SJohannes Berg if (reg_request_cell_base(lr)) 20651a919318SJohannes Berg pr_info("Regulatory domain changed to country: %c%c by Cell Station\n", 2066b2e1b302SLuis R. Rodriguez rd->alpha2[0], rd->alpha2[1]); 206757b5ce07SLuis R. Rodriguez else 20681a919318SJohannes Berg pr_info("Regulatory domain changed to country: %c%c\n", 206957b5ce07SLuis R. Rodriguez rd->alpha2[0], rd->alpha2[1]); 207057b5ce07SLuis R. Rodriguez } 2071b2e1b302SLuis R. Rodriguez } 20721a919318SJohannes Berg 20738b60b078SLuis R. Rodriguez print_dfs_region(rd->dfs_region); 2074b2e1b302SLuis R. Rodriguez print_rd_rules(rd); 2075b2e1b302SLuis R. Rodriguez } 2076b2e1b302SLuis R. Rodriguez 20772df78167SJohannes Berg static void print_regdomain_info(const struct ieee80211_regdomain *rd) 2078b2e1b302SLuis R. Rodriguez { 2079e9c0268fSJoe Perches pr_info("Regulatory domain: %c%c\n", rd->alpha2[0], rd->alpha2[1]); 2080b2e1b302SLuis R. Rodriguez print_rd_rules(rd); 2081b2e1b302SLuis R. Rodriguez } 2082b2e1b302SLuis R. Rodriguez 2083d2372b31SJohannes Berg /* Takes ownership of rd only if it doesn't fail */ 2084a3d2eaf0SJohannes Berg static int __set_regdom(const struct ieee80211_regdomain *rd) 2085b2e1b302SLuis R. Rodriguez { 2086e9763c3cSJohannes Berg const struct ieee80211_regdomain *regd; 20879c96477dSLuis R. Rodriguez const struct ieee80211_regdomain *intersected_rd = NULL; 2088806a9e39SLuis R. Rodriguez struct wiphy *request_wiphy; 2089c492db37SJohannes Berg struct regulatory_request *lr = get_last_request(); 20906913b49aSJohannes Berg 2091b2e1b302SLuis R. Rodriguez /* Some basic sanity checks first */ 2092b2e1b302SLuis R. Rodriguez 20936913b49aSJohannes Berg if (!reg_is_valid_request(rd->alpha2)) 2094b2e1b302SLuis R. Rodriguez return -EINVAL; 20956913b49aSJohannes Berg 20966913b49aSJohannes Berg if (is_world_regdom(rd->alpha2)) { 2097b2e1b302SLuis R. Rodriguez update_world_regdomain(rd); 2098b2e1b302SLuis R. Rodriguez return 0; 2099b2e1b302SLuis R. Rodriguez } 2100b2e1b302SLuis R. Rodriguez 2101b2e1b302SLuis R. Rodriguez if (!is_alpha2_set(rd->alpha2) && !is_an_alpha2(rd->alpha2) && 2102b2e1b302SLuis R. Rodriguez !is_unknown_alpha2(rd->alpha2)) 2103b2e1b302SLuis R. Rodriguez return -EINVAL; 2104b2e1b302SLuis R. Rodriguez 2105fb1fc7adSLuis R. Rodriguez /* 2106fb1fc7adSLuis R. Rodriguez * Lets only bother proceeding on the same alpha2 if the current 21073f2355cbSLuis R. Rodriguez * rd is non static (it means CRDA was present and was used last) 2108fb1fc7adSLuis R. Rodriguez * and the pending request came in from a country IE 2109fb1fc7adSLuis R. Rodriguez */ 2110c492db37SJohannes Berg if (lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE) { 2111fb1fc7adSLuis R. Rodriguez /* 2112fb1fc7adSLuis R. Rodriguez * If someone else asked us to change the rd lets only bother 2113fb1fc7adSLuis R. Rodriguez * checking if the alpha2 changes if CRDA was already called 2114fb1fc7adSLuis R. Rodriguez */ 2115baeb66feSJohn W. Linville if (!regdom_changes(rd->alpha2)) 211695908535SKalle Valo return -EALREADY; 21173f2355cbSLuis R. Rodriguez } 21183f2355cbSLuis R. Rodriguez 2119fb1fc7adSLuis R. Rodriguez /* 2120fb1fc7adSLuis R. Rodriguez * Now lets set the regulatory domain, update all driver channels 2121b2e1b302SLuis R. Rodriguez * and finally inform them of what we have done, in case they want 2122b2e1b302SLuis R. Rodriguez * to review or adjust their own settings based on their own 2123fb1fc7adSLuis R. Rodriguez * internal EEPROM data 2124fb1fc7adSLuis R. Rodriguez */ 2125b2e1b302SLuis R. Rodriguez 2126b2e1b302SLuis R. Rodriguez if (!is_valid_rd(rd)) { 2127e9c0268fSJoe Perches pr_err("Invalid regulatory domain detected:\n"); 2128b2e1b302SLuis R. Rodriguez print_regdomain_info(rd); 2129b2e1b302SLuis R. Rodriguez return -EINVAL; 2130b2e1b302SLuis R. Rodriguez } 2131b2e1b302SLuis R. Rodriguez 2132c492db37SJohannes Berg request_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx); 21330bac71afSLuis R. Rodriguez if (!request_wiphy && 2134c492db37SJohannes Berg (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER || 2135c492db37SJohannes Berg lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE)) { 21360bac71afSLuis R. Rodriguez schedule_delayed_work(®_timeout, 0); 2137de3584bdSJohannes Berg return -ENODEV; 2138de3584bdSJohannes Berg } 2139806a9e39SLuis R. Rodriguez 2140c492db37SJohannes Berg if (!lr->intersect) { 2141c492db37SJohannes Berg if (lr->initiator != NL80211_REGDOM_SET_BY_DRIVER) { 2142379b82f4SJohannes Berg reset_regdomains(false, rd); 21433e0c3ff3SLuis R. Rodriguez return 0; 21443e0c3ff3SLuis R. Rodriguez } 21453e0c3ff3SLuis R. Rodriguez 2146fb1fc7adSLuis R. Rodriguez /* 2147fb1fc7adSLuis R. Rodriguez * For a driver hint, lets copy the regulatory domain the 2148fb1fc7adSLuis R. Rodriguez * driver wanted to the wiphy to deal with conflicts 2149fb1fc7adSLuis R. Rodriguez */ 21503e0c3ff3SLuis R. Rodriguez 2151558f6d32SLuis R. Rodriguez /* 2152558f6d32SLuis R. Rodriguez * Userspace could have sent two replies with only 2153558f6d32SLuis R. Rodriguez * one kernel request. 2154558f6d32SLuis R. Rodriguez */ 2155558f6d32SLuis R. Rodriguez if (request_wiphy->regd) 2156558f6d32SLuis R. Rodriguez return -EALREADY; 21573e0c3ff3SLuis R. Rodriguez 2158e9763c3cSJohannes Berg regd = reg_copy_regd(rd); 2159e9763c3cSJohannes Berg if (IS_ERR(regd)) 2160e9763c3cSJohannes Berg return PTR_ERR(regd); 21613e0c3ff3SLuis R. Rodriguez 2162458f4f9eSJohannes Berg rcu_assign_pointer(request_wiphy->regd, regd); 2163379b82f4SJohannes Berg reset_regdomains(false, rd); 2164b8295acdSLuis R. Rodriguez return 0; 2165b8295acdSLuis R. Rodriguez } 2166b8295acdSLuis R. Rodriguez 2167b8295acdSLuis R. Rodriguez /* Intersection requires a bit more work */ 2168b8295acdSLuis R. Rodriguez 2169c492db37SJohannes Berg if (lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE) { 2170458f4f9eSJohannes Berg intersected_rd = regdom_intersect(rd, get_cfg80211_regdom()); 21719c96477dSLuis R. Rodriguez if (!intersected_rd) 21729c96477dSLuis R. Rodriguez return -EINVAL; 2173b8295acdSLuis R. Rodriguez 2174fb1fc7adSLuis R. Rodriguez /* 2175fb1fc7adSLuis R. Rodriguez * We can trash what CRDA provided now. 21763e0c3ff3SLuis R. Rodriguez * However if a driver requested this specific regulatory 2177fb1fc7adSLuis R. Rodriguez * domain we keep it for its private use 2178fb1fc7adSLuis R. Rodriguez */ 2179b7566fc3SLarry Finger if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER) { 2180b7566fc3SLarry Finger const struct ieee80211_regdomain *tmp; 2181b7566fc3SLarry Finger 2182b7566fc3SLarry Finger tmp = get_wiphy_regdom(request_wiphy); 2183458f4f9eSJohannes Berg rcu_assign_pointer(request_wiphy->regd, rd); 2184b7566fc3SLarry Finger rcu_free_regdom(tmp); 2185b7566fc3SLarry Finger } else { 21869c96477dSLuis R. Rodriguez kfree(rd); 2187b7566fc3SLarry Finger } 21883e0c3ff3SLuis R. Rodriguez 2189b8295acdSLuis R. Rodriguez rd = NULL; 2190b8295acdSLuis R. Rodriguez 2191379b82f4SJohannes Berg reset_regdomains(false, intersected_rd); 2192b8295acdSLuis R. Rodriguez 2193b8295acdSLuis R. Rodriguez return 0; 21949c96477dSLuis R. Rodriguez } 21959c96477dSLuis R. Rodriguez 21963f2355cbSLuis R. Rodriguez return -EINVAL; 2197b2e1b302SLuis R. Rodriguez } 2198b2e1b302SLuis R. Rodriguez 2199b2e1b302SLuis R. Rodriguez 2200fb1fc7adSLuis R. Rodriguez /* 2201fb1fc7adSLuis R. Rodriguez * Use this call to set the current regulatory domain. Conflicts with 2202b2e1b302SLuis R. Rodriguez * multiple drivers can be ironed out later. Caller must've already 2203458f4f9eSJohannes Berg * kmalloc'd the rd structure. 2204fb1fc7adSLuis R. Rodriguez */ 2205a3d2eaf0SJohannes Berg int set_regdom(const struct ieee80211_regdomain *rd) 2206b2e1b302SLuis R. Rodriguez { 2207c492db37SJohannes Berg struct regulatory_request *lr; 2208b2e1b302SLuis R. Rodriguez int r; 2209b2e1b302SLuis R. Rodriguez 2210c492db37SJohannes Berg lr = get_last_request(); 2211abc7381bSLuis R. Rodriguez 2212b2e1b302SLuis R. Rodriguez /* Note that this doesn't update the wiphys, this is done below */ 2213b2e1b302SLuis R. Rodriguez r = __set_regdom(rd); 2214d2372b31SJohannes Berg if (r) { 221595908535SKalle Valo if (r == -EALREADY) 221695908535SKalle Valo reg_set_request_processed(); 221795908535SKalle Valo 2218d2372b31SJohannes Berg kfree(rd); 221938fd2143SJohannes Berg return r; 2220d2372b31SJohannes Berg } 2221b2e1b302SLuis R. Rodriguez 2222b2e1b302SLuis R. Rodriguez /* This would make this whole thing pointless */ 222338fd2143SJohannes Berg if (WARN_ON(!lr->intersect && rd != get_cfg80211_regdom())) 222438fd2143SJohannes Berg return -EINVAL; 2225b2e1b302SLuis R. Rodriguez 2226b2e1b302SLuis R. Rodriguez /* update all wiphys now with the new established regulatory domain */ 2227c492db37SJohannes Berg update_all_wiphy_regulatory(lr->initiator); 2228b2e1b302SLuis R. Rodriguez 2229458f4f9eSJohannes Berg print_regdomain(get_cfg80211_regdom()); 2230b2e1b302SLuis R. Rodriguez 2231c492db37SJohannes Berg nl80211_send_reg_change_event(lr); 223273d54c9eSLuis R. Rodriguez 2233b2e253cfSLuis R. Rodriguez reg_set_request_processed(); 2234b2e253cfSLuis R. Rodriguez 223538fd2143SJohannes Berg return 0; 2236b2e1b302SLuis R. Rodriguez } 2237b2e1b302SLuis R. Rodriguez 22384d9d88d1SScott James Remnant int reg_device_uevent(struct device *dev, struct kobj_uevent_env *env) 22394d9d88d1SScott James Remnant { 22404a484cffSJohannes Berg struct regulatory_request *lr; 22414a484cffSJohannes Berg u8 alpha2[2]; 22424a484cffSJohannes Berg bool add = false; 22434d9d88d1SScott James Remnant 22444a484cffSJohannes Berg rcu_read_lock(); 22454a484cffSJohannes Berg lr = get_last_request(); 2246c492db37SJohannes Berg if (lr && !lr->processed) { 22474a484cffSJohannes Berg memcpy(alpha2, lr->alpha2, 2); 22484a484cffSJohannes Berg add = true; 22494d9d88d1SScott James Remnant } 22504a484cffSJohannes Berg rcu_read_unlock(); 22514d9d88d1SScott James Remnant 22524a484cffSJohannes Berg if (add) 22534a484cffSJohannes Berg return add_uevent_var(env, "COUNTRY=%c%c", 22544a484cffSJohannes Berg alpha2[0], alpha2[1]); 22554d9d88d1SScott James Remnant return 0; 22564d9d88d1SScott James Remnant } 22574d9d88d1SScott James Remnant 225857b5ce07SLuis R. Rodriguez void wiphy_regulatory_register(struct wiphy *wiphy) 225957b5ce07SLuis R. Rodriguez { 226023df0b73SArik Nemtsov struct regulatory_request *lr; 226123df0b73SArik Nemtsov 226257b5ce07SLuis R. Rodriguez if (!reg_dev_ignore_cell_hint(wiphy)) 226357b5ce07SLuis R. Rodriguez reg_num_devs_support_basehint++; 226457b5ce07SLuis R. Rodriguez 226523df0b73SArik Nemtsov lr = get_last_request(); 226623df0b73SArik Nemtsov wiphy_update_regulatory(wiphy, lr->initiator); 226757b5ce07SLuis R. Rodriguez } 226857b5ce07SLuis R. Rodriguez 2269bfead080SLuis R. Rodriguez void wiphy_regulatory_deregister(struct wiphy *wiphy) 22703f2355cbSLuis R. Rodriguez { 22710ad8acafSLuis R. Rodriguez struct wiphy *request_wiphy = NULL; 2272c492db37SJohannes Berg struct regulatory_request *lr; 2273761cf7ecSLuis R. Rodriguez 2274c492db37SJohannes Berg lr = get_last_request(); 2275abc7381bSLuis R. Rodriguez 227657b5ce07SLuis R. Rodriguez if (!reg_dev_ignore_cell_hint(wiphy)) 227757b5ce07SLuis R. Rodriguez reg_num_devs_support_basehint--; 227857b5ce07SLuis R. Rodriguez 2279458f4f9eSJohannes Berg rcu_free_regdom(get_wiphy_regdom(wiphy)); 2280458f4f9eSJohannes Berg rcu_assign_pointer(wiphy->regd, NULL); 22810ef9ccddSChris Wright 2282c492db37SJohannes Berg if (lr) 2283c492db37SJohannes Berg request_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx); 2284806a9e39SLuis R. Rodriguez 22850ef9ccddSChris Wright if (!request_wiphy || request_wiphy != wiphy) 228638fd2143SJohannes Berg return; 22870ef9ccddSChris Wright 2288c492db37SJohannes Berg lr->wiphy_idx = WIPHY_IDX_INVALID; 2289c492db37SJohannes Berg lr->country_ie_env = ENVIRON_ANY; 22903f2355cbSLuis R. Rodriguez } 22913f2355cbSLuis R. Rodriguez 2292a90c7a31SLuis R. Rodriguez static void reg_timeout_work(struct work_struct *work) 2293a90c7a31SLuis R. Rodriguez { 22941a919318SJohannes Berg REG_DBG_PRINT("Timeout while waiting for CRDA to reply, restoring regulatory settings\n"); 2295f77b86d7SJohannes Berg rtnl_lock(); 2296a90c7a31SLuis R. Rodriguez restore_regulatory_settings(true); 2297f77b86d7SJohannes Berg rtnl_unlock(); 2298a90c7a31SLuis R. Rodriguez } 2299a90c7a31SLuis R. Rodriguez 23002fcc9f73SUwe Kleine-König int __init regulatory_init(void) 2301b2e1b302SLuis R. Rodriguez { 2302bcf4f99bSLuis R. Rodriguez int err = 0; 2303734366deSJohannes Berg 2304b2e1b302SLuis R. Rodriguez reg_pdev = platform_device_register_simple("regulatory", 0, NULL, 0); 2305b2e1b302SLuis R. Rodriguez if (IS_ERR(reg_pdev)) 2306b2e1b302SLuis R. Rodriguez return PTR_ERR(reg_pdev); 2307734366deSJohannes Berg 23084d9d88d1SScott James Remnant reg_pdev->dev.type = ®_device_type; 23094d9d88d1SScott James Remnant 2310fe33eb39SLuis R. Rodriguez spin_lock_init(®_requests_lock); 2311e38f8a7aSLuis R. Rodriguez spin_lock_init(®_pending_beacons_lock); 2312fe33eb39SLuis R. Rodriguez 231380007efeSLuis R. Rodriguez reg_regdb_size_check(); 231480007efeSLuis R. Rodriguez 2315458f4f9eSJohannes Berg rcu_assign_pointer(cfg80211_regdomain, cfg80211_world_regdom); 2316734366deSJohannes Berg 231709d989d1SLuis R. Rodriguez user_alpha2[0] = '9'; 231809d989d1SLuis R. Rodriguez user_alpha2[1] = '7'; 231909d989d1SLuis R. Rodriguez 2320ae9e4b0dSLuis R. Rodriguez /* We always try to get an update for the static regdomain */ 2321458f4f9eSJohannes Berg err = regulatory_hint_core(cfg80211_world_regdom->alpha2); 2322bcf4f99bSLuis R. Rodriguez if (err) { 2323bcf4f99bSLuis R. Rodriguez if (err == -ENOMEM) 2324bcf4f99bSLuis R. Rodriguez return err; 2325bcf4f99bSLuis R. Rodriguez /* 2326bcf4f99bSLuis R. Rodriguez * N.B. kobject_uevent_env() can fail mainly for when we're out 2327bcf4f99bSLuis R. Rodriguez * memory which is handled and propagated appropriately above 2328bcf4f99bSLuis R. Rodriguez * but it can also fail during a netlink_broadcast() or during 2329bcf4f99bSLuis R. Rodriguez * early boot for call_usermodehelper(). For now treat these 2330bcf4f99bSLuis R. Rodriguez * errors as non-fatal. 2331bcf4f99bSLuis R. Rodriguez */ 2332e9c0268fSJoe Perches pr_err("kobject_uevent_env() was unable to call CRDA during init\n"); 2333bcf4f99bSLuis R. Rodriguez } 2334734366deSJohannes Berg 2335ae9e4b0dSLuis R. Rodriguez /* 2336ae9e4b0dSLuis R. Rodriguez * Finally, if the user set the module parameter treat it 2337ae9e4b0dSLuis R. Rodriguez * as a user hint. 2338ae9e4b0dSLuis R. Rodriguez */ 2339ae9e4b0dSLuis R. Rodriguez if (!is_world_regdom(ieee80211_regdom)) 234057b5ce07SLuis R. Rodriguez regulatory_hint_user(ieee80211_regdom, 234157b5ce07SLuis R. Rodriguez NL80211_USER_REG_HINT_USER); 2342ae9e4b0dSLuis R. Rodriguez 2343b2e1b302SLuis R. Rodriguez return 0; 2344b2e1b302SLuis R. Rodriguez } 2345b2e1b302SLuis R. Rodriguez 23461a919318SJohannes Berg void regulatory_exit(void) 2347b2e1b302SLuis R. Rodriguez { 2348fe33eb39SLuis R. Rodriguez struct regulatory_request *reg_request, *tmp; 2349e38f8a7aSLuis R. Rodriguez struct reg_beacon *reg_beacon, *btmp; 2350fe33eb39SLuis R. Rodriguez 2351fe33eb39SLuis R. Rodriguez cancel_work_sync(®_work); 2352a90c7a31SLuis R. Rodriguez cancel_delayed_work_sync(®_timeout); 2353fe33eb39SLuis R. Rodriguez 23549027b149SJohannes Berg /* Lock to suppress warnings */ 235538fd2143SJohannes Berg rtnl_lock(); 2356379b82f4SJohannes Berg reset_regdomains(true, NULL); 235738fd2143SJohannes Berg rtnl_unlock(); 2358734366deSJohannes Berg 235958ebacc6SLuis R. Rodriguez dev_set_uevent_suppress(®_pdev->dev, true); 2360f6037d09SJohannes Berg 2361b2e1b302SLuis R. Rodriguez platform_device_unregister(reg_pdev); 2362734366deSJohannes Berg 2363fea9bcedSJohannes Berg list_for_each_entry_safe(reg_beacon, btmp, ®_pending_beacons, list) { 2364e38f8a7aSLuis R. Rodriguez list_del(®_beacon->list); 2365e38f8a7aSLuis R. Rodriguez kfree(reg_beacon); 2366e38f8a7aSLuis R. Rodriguez } 2367e38f8a7aSLuis R. Rodriguez 2368fea9bcedSJohannes Berg list_for_each_entry_safe(reg_beacon, btmp, ®_beacon_list, list) { 2369e38f8a7aSLuis R. Rodriguez list_del(®_beacon->list); 2370e38f8a7aSLuis R. Rodriguez kfree(reg_beacon); 2371e38f8a7aSLuis R. Rodriguez } 2372e38f8a7aSLuis R. Rodriguez 2373fea9bcedSJohannes Berg list_for_each_entry_safe(reg_request, tmp, ®_requests_list, list) { 2374fe33eb39SLuis R. Rodriguez list_del(®_request->list); 2375fe33eb39SLuis R. Rodriguez kfree(reg_request); 2376fe33eb39SLuis R. Rodriguez } 2377fe33eb39SLuis R. Rodriguez } 2378