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, 1668fe02e16SLuis R. Rodriguez NL80211_RRF_NO_IR), 167611b6a82SLuis R. Rodriguez /* IEEE 802.11 channel 14 - Only JP enables 168611b6a82SLuis R. Rodriguez * this and for 802.11b only */ 169611b6a82SLuis R. Rodriguez REG_RULE(2484-10, 2484+10, 20, 6, 20, 1708fe02e16SLuis R. Rodriguez NL80211_RRF_NO_IR | 171611b6a82SLuis R. Rodriguez NL80211_RRF_NO_OFDM), 1723fc71f77SLuis R. Rodriguez /* IEEE 802.11a, channel 36..48 */ 173131a19bcSJohannes Berg REG_RULE(5180-10, 5240+10, 160, 6, 20, 1748fe02e16SLuis R. Rodriguez NL80211_RRF_NO_IR), 1753fc71f77SLuis R. Rodriguez 176131a19bcSJohannes Berg /* IEEE 802.11a, channel 52..64 - DFS required */ 177131a19bcSJohannes Berg REG_RULE(5260-10, 5320+10, 160, 6, 20, 1788fe02e16SLuis R. Rodriguez NL80211_RRF_NO_IR | 179131a19bcSJohannes Berg NL80211_RRF_DFS), 180131a19bcSJohannes Berg 181131a19bcSJohannes Berg /* IEEE 802.11a, channel 100..144 - DFS required */ 182131a19bcSJohannes Berg REG_RULE(5500-10, 5720+10, 160, 6, 20, 1838fe02e16SLuis R. Rodriguez NL80211_RRF_NO_IR | 184131a19bcSJohannes Berg NL80211_RRF_DFS), 1853fc71f77SLuis R. Rodriguez 1863fc71f77SLuis R. Rodriguez /* IEEE 802.11a, channel 149..165 */ 1878ab9d85cSJohannes Berg REG_RULE(5745-10, 5825+10, 80, 6, 20, 1888fe02e16SLuis R. Rodriguez NL80211_RRF_NO_IR), 18990cdc6dfSVladimir Kondratiev 19090cdc6dfSVladimir Kondratiev /* IEEE 802.11ad (60gHz), channels 1..3 */ 19190cdc6dfSVladimir Kondratiev REG_RULE(56160+2160*1-1080, 56160+2160*3+1080, 2160, 0, 0, 0), 192734366deSJohannes Berg } 193734366deSJohannes Berg }; 194734366deSJohannes Berg 19538fd2143SJohannes Berg /* protected by RTNL */ 196a3d2eaf0SJohannes Berg static const struct ieee80211_regdomain *cfg80211_world_regdom = 197a3d2eaf0SJohannes Berg &world_regdom; 198734366deSJohannes Berg 1996ee7d330SLuis R. Rodriguez static char *ieee80211_regdom = "00"; 20009d989d1SLuis R. Rodriguez static char user_alpha2[2]; 2016ee7d330SLuis R. Rodriguez 202734366deSJohannes Berg module_param(ieee80211_regdom, charp, 0444); 203734366deSJohannes Berg MODULE_PARM_DESC(ieee80211_regdom, "IEEE 802.11 regulatory domain code"); 204734366deSJohannes Berg 205379b82f4SJohannes Berg static void reset_regdomains(bool full_reset, 206379b82f4SJohannes Berg const struct ieee80211_regdomain *new_regdom) 207734366deSJohannes Berg { 208458f4f9eSJohannes Berg const struct ieee80211_regdomain *r; 209c492db37SJohannes Berg struct regulatory_request *lr; 210458f4f9eSJohannes Berg 21138fd2143SJohannes Berg ASSERT_RTNL(); 212e8da2bb4SJohannes Berg 213458f4f9eSJohannes Berg r = get_cfg80211_regdom(); 214458f4f9eSJohannes Berg 215942b25cfSJohannes Berg /* avoid freeing static information or freeing something twice */ 216458f4f9eSJohannes Berg if (r == cfg80211_world_regdom) 217458f4f9eSJohannes Berg r = NULL; 218942b25cfSJohannes Berg if (cfg80211_world_regdom == &world_regdom) 219942b25cfSJohannes Berg cfg80211_world_regdom = NULL; 220458f4f9eSJohannes Berg if (r == &world_regdom) 221458f4f9eSJohannes Berg r = NULL; 222942b25cfSJohannes Berg 223458f4f9eSJohannes Berg rcu_free_regdom(r); 224458f4f9eSJohannes Berg rcu_free_regdom(cfg80211_world_regdom); 225734366deSJohannes Berg 226a3d2eaf0SJohannes Berg cfg80211_world_regdom = &world_regdom; 227458f4f9eSJohannes Berg rcu_assign_pointer(cfg80211_regdomain, new_regdom); 228a042994dSLuis R. Rodriguez 229a042994dSLuis R. Rodriguez if (!full_reset) 230a042994dSLuis R. Rodriguez return; 231a042994dSLuis R. Rodriguez 232c492db37SJohannes Berg lr = get_last_request(); 233c492db37SJohannes Berg if (lr != &core_request_world && lr) 234c492db37SJohannes Berg kfree_rcu(lr, rcu_head); 235c492db37SJohannes Berg rcu_assign_pointer(last_request, &core_request_world); 236734366deSJohannes Berg } 237734366deSJohannes Berg 238fb1fc7adSLuis R. Rodriguez /* 239fb1fc7adSLuis R. Rodriguez * Dynamic world regulatory domain requested by the wireless 240fb1fc7adSLuis R. Rodriguez * core upon initialization 241fb1fc7adSLuis R. Rodriguez */ 242a3d2eaf0SJohannes Berg static void update_world_regdomain(const struct ieee80211_regdomain *rd) 243734366deSJohannes Berg { 244c492db37SJohannes Berg struct regulatory_request *lr; 245734366deSJohannes Berg 246c492db37SJohannes Berg lr = get_last_request(); 247c492db37SJohannes Berg 248c492db37SJohannes Berg WARN_ON(!lr); 249e8da2bb4SJohannes Berg 250379b82f4SJohannes Berg reset_regdomains(false, rd); 251734366deSJohannes Berg 252734366deSJohannes Berg cfg80211_world_regdom = rd; 253734366deSJohannes Berg } 254734366deSJohannes Berg 255a3d2eaf0SJohannes Berg bool is_world_regdom(const char *alpha2) 256b2e1b302SLuis R. Rodriguez { 257b2e1b302SLuis R. Rodriguez if (!alpha2) 258b2e1b302SLuis R. Rodriguez return false; 2591a919318SJohannes Berg return alpha2[0] == '0' && alpha2[1] == '0'; 260b2e1b302SLuis R. Rodriguez } 261b2e1b302SLuis R. Rodriguez 262a3d2eaf0SJohannes Berg static bool is_alpha2_set(const char *alpha2) 263b2e1b302SLuis R. Rodriguez { 264b2e1b302SLuis R. Rodriguez if (!alpha2) 265b2e1b302SLuis R. Rodriguez return false; 2661a919318SJohannes Berg return alpha2[0] && alpha2[1]; 267b2e1b302SLuis R. Rodriguez } 268b2e1b302SLuis R. Rodriguez 269a3d2eaf0SJohannes Berg static bool is_unknown_alpha2(const char *alpha2) 270b2e1b302SLuis R. Rodriguez { 271b2e1b302SLuis R. Rodriguez if (!alpha2) 272b2e1b302SLuis R. Rodriguez return false; 273fb1fc7adSLuis R. Rodriguez /* 274fb1fc7adSLuis R. Rodriguez * Special case where regulatory domain was built by driver 275fb1fc7adSLuis R. Rodriguez * but a specific alpha2 cannot be determined 276fb1fc7adSLuis R. Rodriguez */ 2771a919318SJohannes Berg return alpha2[0] == '9' && alpha2[1] == '9'; 278b2e1b302SLuis R. Rodriguez } 279b2e1b302SLuis R. Rodriguez 2803f2355cbSLuis R. Rodriguez static bool is_intersected_alpha2(const char *alpha2) 2813f2355cbSLuis R. Rodriguez { 2823f2355cbSLuis R. Rodriguez if (!alpha2) 2833f2355cbSLuis R. Rodriguez return false; 284fb1fc7adSLuis R. Rodriguez /* 285fb1fc7adSLuis R. Rodriguez * Special case where regulatory domain is the 2863f2355cbSLuis R. Rodriguez * result of an intersection between two regulatory domain 287fb1fc7adSLuis R. Rodriguez * structures 288fb1fc7adSLuis R. Rodriguez */ 2891a919318SJohannes Berg return alpha2[0] == '9' && alpha2[1] == '8'; 2903f2355cbSLuis R. Rodriguez } 2913f2355cbSLuis R. Rodriguez 292a3d2eaf0SJohannes Berg static bool is_an_alpha2(const char *alpha2) 293b2e1b302SLuis R. Rodriguez { 294b2e1b302SLuis R. Rodriguez if (!alpha2) 295b2e1b302SLuis R. Rodriguez return false; 2961a919318SJohannes Berg return isalpha(alpha2[0]) && isalpha(alpha2[1]); 297b2e1b302SLuis R. Rodriguez } 298b2e1b302SLuis R. Rodriguez 299a3d2eaf0SJohannes Berg static bool alpha2_equal(const char *alpha2_x, const char *alpha2_y) 300b2e1b302SLuis R. Rodriguez { 301b2e1b302SLuis R. Rodriguez if (!alpha2_x || !alpha2_y) 302b2e1b302SLuis R. Rodriguez return false; 3031a919318SJohannes Berg return alpha2_x[0] == alpha2_y[0] && alpha2_x[1] == alpha2_y[1]; 304b2e1b302SLuis R. Rodriguez } 305b2e1b302SLuis R. Rodriguez 30669b1572bSLuis R. Rodriguez static bool regdom_changes(const char *alpha2) 307b2e1b302SLuis R. Rodriguez { 308458f4f9eSJohannes Berg const struct ieee80211_regdomain *r = get_cfg80211_regdom(); 309761cf7ecSLuis R. Rodriguez 310458f4f9eSJohannes Berg if (!r) 311b2e1b302SLuis R. Rodriguez return true; 312458f4f9eSJohannes Berg return !alpha2_equal(r->alpha2, alpha2); 313b2e1b302SLuis R. Rodriguez } 314b2e1b302SLuis R. Rodriguez 31509d989d1SLuis R. Rodriguez /* 31609d989d1SLuis R. Rodriguez * The NL80211_REGDOM_SET_BY_USER regdom alpha2 is cached, this lets 31709d989d1SLuis R. Rodriguez * you know if a valid regulatory hint with NL80211_REGDOM_SET_BY_USER 31809d989d1SLuis R. Rodriguez * has ever been issued. 31909d989d1SLuis R. Rodriguez */ 32009d989d1SLuis R. Rodriguez static bool is_user_regdom_saved(void) 32109d989d1SLuis R. Rodriguez { 32209d989d1SLuis R. Rodriguez if (user_alpha2[0] == '9' && user_alpha2[1] == '7') 32309d989d1SLuis R. Rodriguez return false; 32409d989d1SLuis R. Rodriguez 32509d989d1SLuis R. Rodriguez /* This would indicate a mistake on the design */ 3261a919318SJohannes Berg if (WARN(!is_world_regdom(user_alpha2) && !is_an_alpha2(user_alpha2), 32709d989d1SLuis R. Rodriguez "Unexpected user alpha2: %c%c\n", 3281a919318SJohannes Berg user_alpha2[0], user_alpha2[1])) 32909d989d1SLuis R. Rodriguez return false; 33009d989d1SLuis R. Rodriguez 33109d989d1SLuis R. Rodriguez return true; 33209d989d1SLuis R. Rodriguez } 33309d989d1SLuis R. Rodriguez 334e9763c3cSJohannes Berg static const struct ieee80211_regdomain * 335e9763c3cSJohannes Berg reg_copy_regd(const struct ieee80211_regdomain *src_regd) 3363b377ea9SJohn W. Linville { 3373b377ea9SJohn W. Linville struct ieee80211_regdomain *regd; 338e9763c3cSJohannes Berg int size_of_regd; 3393b377ea9SJohn W. Linville unsigned int i; 3403b377ea9SJohn W. Linville 34182f20856SJohannes Berg size_of_regd = 34282f20856SJohannes Berg sizeof(struct ieee80211_regdomain) + 34382f20856SJohannes Berg src_regd->n_reg_rules * sizeof(struct ieee80211_reg_rule); 3443b377ea9SJohn W. Linville 3453b377ea9SJohn W. Linville regd = kzalloc(size_of_regd, GFP_KERNEL); 3463b377ea9SJohn W. Linville if (!regd) 347e9763c3cSJohannes Berg return ERR_PTR(-ENOMEM); 3483b377ea9SJohn W. Linville 3493b377ea9SJohn W. Linville memcpy(regd, src_regd, sizeof(struct ieee80211_regdomain)); 3503b377ea9SJohn W. Linville 3513b377ea9SJohn W. Linville for (i = 0; i < src_regd->n_reg_rules; i++) 3523b377ea9SJohn W. Linville memcpy(®d->reg_rules[i], &src_regd->reg_rules[i], 3533b377ea9SJohn W. Linville sizeof(struct ieee80211_reg_rule)); 3543b377ea9SJohn W. Linville 355e9763c3cSJohannes Berg return regd; 3563b377ea9SJohn W. Linville } 3573b377ea9SJohn W. Linville 3583b377ea9SJohn W. Linville #ifdef CONFIG_CFG80211_INTERNAL_REGDB 3593b377ea9SJohn W. Linville struct reg_regdb_search_request { 3603b377ea9SJohn W. Linville char alpha2[2]; 3613b377ea9SJohn W. Linville struct list_head list; 3623b377ea9SJohn W. Linville }; 3633b377ea9SJohn W. Linville 3643b377ea9SJohn W. Linville static LIST_HEAD(reg_regdb_search_list); 365368d06f5SJohn W. Linville static DEFINE_MUTEX(reg_regdb_search_mutex); 3663b377ea9SJohn W. Linville 3673b377ea9SJohn W. Linville static void reg_regdb_search(struct work_struct *work) 3683b377ea9SJohn W. Linville { 3693b377ea9SJohn W. Linville struct reg_regdb_search_request *request; 370e9763c3cSJohannes Berg const struct ieee80211_regdomain *curdom, *regdom = NULL; 371e9763c3cSJohannes Berg int i; 372a85d0d7fSLuis R. Rodriguez 3735fe231e8SJohannes Berg rtnl_lock(); 3743b377ea9SJohn W. Linville 375368d06f5SJohn W. Linville mutex_lock(®_regdb_search_mutex); 3763b377ea9SJohn W. Linville while (!list_empty(®_regdb_search_list)) { 3773b377ea9SJohn W. Linville request = list_first_entry(®_regdb_search_list, 3783b377ea9SJohn W. Linville struct reg_regdb_search_request, 3793b377ea9SJohn W. Linville list); 3803b377ea9SJohn W. Linville list_del(&request->list); 3813b377ea9SJohn W. Linville 3823b377ea9SJohn W. Linville for (i = 0; i < reg_regdb_size; i++) { 3833b377ea9SJohn W. Linville curdom = reg_regdb[i]; 3843b377ea9SJohn W. Linville 3851a919318SJohannes Berg if (alpha2_equal(request->alpha2, curdom->alpha2)) { 386e9763c3cSJohannes Berg regdom = reg_copy_regd(curdom); 3873b377ea9SJohn W. Linville break; 3883b377ea9SJohn W. Linville } 3893b377ea9SJohn W. Linville } 3903b377ea9SJohn W. Linville 3913b377ea9SJohn W. Linville kfree(request); 3923b377ea9SJohn W. Linville } 393368d06f5SJohn W. Linville mutex_unlock(®_regdb_search_mutex); 394a85d0d7fSLuis R. Rodriguez 395e9763c3cSJohannes Berg if (!IS_ERR_OR_NULL(regdom)) 396a85d0d7fSLuis R. Rodriguez set_regdom(regdom); 397a85d0d7fSLuis R. Rodriguez 3985fe231e8SJohannes Berg rtnl_unlock(); 3993b377ea9SJohn W. Linville } 4003b377ea9SJohn W. Linville 4013b377ea9SJohn W. Linville static DECLARE_WORK(reg_regdb_work, reg_regdb_search); 4023b377ea9SJohn W. Linville 4033b377ea9SJohn W. Linville static void reg_regdb_query(const char *alpha2) 4043b377ea9SJohn W. Linville { 4053b377ea9SJohn W. Linville struct reg_regdb_search_request *request; 4063b377ea9SJohn W. Linville 4073b377ea9SJohn W. Linville if (!alpha2) 4083b377ea9SJohn W. Linville return; 4093b377ea9SJohn W. Linville 4103b377ea9SJohn W. Linville request = kzalloc(sizeof(struct reg_regdb_search_request), GFP_KERNEL); 4113b377ea9SJohn W. Linville if (!request) 4123b377ea9SJohn W. Linville return; 4133b377ea9SJohn W. Linville 4143b377ea9SJohn W. Linville memcpy(request->alpha2, alpha2, 2); 4153b377ea9SJohn W. Linville 416368d06f5SJohn W. Linville mutex_lock(®_regdb_search_mutex); 4173b377ea9SJohn W. Linville list_add_tail(&request->list, ®_regdb_search_list); 418368d06f5SJohn W. Linville mutex_unlock(®_regdb_search_mutex); 4193b377ea9SJohn W. Linville 4203b377ea9SJohn W. Linville schedule_work(®_regdb_work); 4213b377ea9SJohn W. Linville } 42280007efeSLuis R. Rodriguez 42380007efeSLuis R. Rodriguez /* Feel free to add any other sanity checks here */ 42480007efeSLuis R. Rodriguez static void reg_regdb_size_check(void) 42580007efeSLuis R. Rodriguez { 42680007efeSLuis R. Rodriguez /* We should ideally BUILD_BUG_ON() but then random builds would fail */ 42780007efeSLuis R. Rodriguez WARN_ONCE(!reg_regdb_size, "db.txt is empty, you should update it..."); 42880007efeSLuis R. Rodriguez } 4293b377ea9SJohn W. Linville #else 43080007efeSLuis R. Rodriguez static inline void reg_regdb_size_check(void) {} 4313b377ea9SJohn W. Linville static inline void reg_regdb_query(const char *alpha2) {} 4323b377ea9SJohn W. Linville #endif /* CONFIG_CFG80211_INTERNAL_REGDB */ 4333b377ea9SJohn W. Linville 434fb1fc7adSLuis R. Rodriguez /* 435fb1fc7adSLuis R. Rodriguez * This lets us keep regulatory code which is updated on a regulatory 4364d9d88d1SScott James Remnant * basis in userspace. Country information is filled in by 4374d9d88d1SScott James Remnant * reg_device_uevent 438fb1fc7adSLuis R. Rodriguez */ 439b2e1b302SLuis R. Rodriguez static int call_crda(const char *alpha2) 440b2e1b302SLuis R. Rodriguez { 441b2e1b302SLuis R. Rodriguez if (!is_world_regdom((char *) alpha2)) 442e9c0268fSJoe Perches pr_info("Calling CRDA for country: %c%c\n", 443b2e1b302SLuis R. Rodriguez alpha2[0], alpha2[1]); 444b2e1b302SLuis R. Rodriguez else 445e9c0268fSJoe Perches pr_info("Calling CRDA to update world regulatory domain\n"); 4468318d78aSJohannes Berg 4473b377ea9SJohn W. Linville /* query internal regulatory database (if it exists) */ 4483b377ea9SJohn W. Linville reg_regdb_query(alpha2); 4493b377ea9SJohn W. Linville 4504d9d88d1SScott James Remnant return kobject_uevent(®_pdev->dev.kobj, KOBJ_CHANGE); 451b2e1b302SLuis R. Rodriguez } 452b2e1b302SLuis R. Rodriguez 4536913b49aSJohannes Berg static bool reg_is_valid_request(const char *alpha2) 454b2e1b302SLuis R. Rodriguez { 455c492db37SJohannes Berg struct regulatory_request *lr = get_last_request(); 45661405e97SLuis R. Rodriguez 457c492db37SJohannes Berg if (!lr || lr->processed) 458f6037d09SJohannes Berg return false; 459f6037d09SJohannes Berg 460c492db37SJohannes Berg return alpha2_equal(lr->alpha2, alpha2); 461b2e1b302SLuis R. Rodriguez } 462b2e1b302SLuis R. Rodriguez 463b2e1b302SLuis R. Rodriguez /* Sanity check on a regulatory rule */ 464a3d2eaf0SJohannes Berg static bool is_valid_reg_rule(const struct ieee80211_reg_rule *rule) 465b2e1b302SLuis R. Rodriguez { 466a3d2eaf0SJohannes Berg const struct ieee80211_freq_range *freq_range = &rule->freq_range; 467b2e1b302SLuis R. Rodriguez u32 freq_diff; 468b2e1b302SLuis R. Rodriguez 46991e99004SLuis R. Rodriguez if (freq_range->start_freq_khz <= 0 || freq_range->end_freq_khz <= 0) 470b2e1b302SLuis R. Rodriguez return false; 471b2e1b302SLuis R. Rodriguez 472b2e1b302SLuis R. Rodriguez if (freq_range->start_freq_khz > freq_range->end_freq_khz) 473b2e1b302SLuis R. Rodriguez return false; 474b2e1b302SLuis R. Rodriguez 475b2e1b302SLuis R. Rodriguez freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz; 476b2e1b302SLuis R. Rodriguez 477bd05f28eSRoel Kluin if (freq_range->end_freq_khz <= freq_range->start_freq_khz || 478bd05f28eSRoel Kluin freq_range->max_bandwidth_khz > freq_diff) 479b2e1b302SLuis R. Rodriguez return false; 480b2e1b302SLuis R. Rodriguez 481b2e1b302SLuis R. Rodriguez return true; 482b2e1b302SLuis R. Rodriguez } 483b2e1b302SLuis R. Rodriguez 484a3d2eaf0SJohannes Berg static bool is_valid_rd(const struct ieee80211_regdomain *rd) 485b2e1b302SLuis R. Rodriguez { 486a3d2eaf0SJohannes Berg const struct ieee80211_reg_rule *reg_rule = NULL; 487b2e1b302SLuis R. Rodriguez unsigned int i; 488b2e1b302SLuis R. Rodriguez 489b2e1b302SLuis R. Rodriguez if (!rd->n_reg_rules) 490b2e1b302SLuis R. Rodriguez return false; 491b2e1b302SLuis R. Rodriguez 49288dc1c3fSLuis R. Rodriguez if (WARN_ON(rd->n_reg_rules > NL80211_MAX_SUPP_REG_RULES)) 49388dc1c3fSLuis R. Rodriguez return false; 49488dc1c3fSLuis R. Rodriguez 495b2e1b302SLuis R. Rodriguez for (i = 0; i < rd->n_reg_rules; i++) { 496b2e1b302SLuis R. Rodriguez reg_rule = &rd->reg_rules[i]; 497b2e1b302SLuis R. Rodriguez if (!is_valid_reg_rule(reg_rule)) 498b2e1b302SLuis R. Rodriguez return false; 499b2e1b302SLuis R. Rodriguez } 500b2e1b302SLuis R. Rodriguez 501b2e1b302SLuis R. Rodriguez return true; 502b2e1b302SLuis R. Rodriguez } 503b2e1b302SLuis R. Rodriguez 504038659e7SLuis R. Rodriguez static bool reg_does_bw_fit(const struct ieee80211_freq_range *freq_range, 505fe7ef5e9SJohannes Berg u32 center_freq_khz, u32 bw_khz) 506b2e1b302SLuis R. Rodriguez { 507038659e7SLuis R. Rodriguez u32 start_freq_khz, end_freq_khz; 508038659e7SLuis R. Rodriguez 509038659e7SLuis R. Rodriguez start_freq_khz = center_freq_khz - (bw_khz/2); 510038659e7SLuis R. Rodriguez end_freq_khz = center_freq_khz + (bw_khz/2); 511038659e7SLuis R. Rodriguez 512b2e1b302SLuis R. Rodriguez if (start_freq_khz >= freq_range->start_freq_khz && 513b2e1b302SLuis R. Rodriguez end_freq_khz <= freq_range->end_freq_khz) 514038659e7SLuis R. Rodriguez return true; 515038659e7SLuis R. Rodriguez 516038659e7SLuis R. Rodriguez return false; 517b2e1b302SLuis R. Rodriguez } 518b2e1b302SLuis R. Rodriguez 5190c7dc45dSLuis R. Rodriguez /** 5200c7dc45dSLuis R. Rodriguez * freq_in_rule_band - tells us if a frequency is in a frequency band 5210c7dc45dSLuis R. Rodriguez * @freq_range: frequency rule we want to query 5220c7dc45dSLuis R. Rodriguez * @freq_khz: frequency we are inquiring about 5230c7dc45dSLuis R. Rodriguez * 5240c7dc45dSLuis R. Rodriguez * This lets us know if a specific frequency rule is or is not relevant to 5250c7dc45dSLuis R. Rodriguez * a specific frequency's band. Bands are device specific and artificial 52664629b9dSVladimir Kondratiev * definitions (the "2.4 GHz band", the "5 GHz band" and the "60GHz band"), 52764629b9dSVladimir Kondratiev * however it is safe for now to assume that a frequency rule should not be 52864629b9dSVladimir Kondratiev * part of a frequency's band if the start freq or end freq are off by more 52964629b9dSVladimir Kondratiev * than 2 GHz for the 2.4 and 5 GHz bands, and by more than 10 GHz for the 53064629b9dSVladimir Kondratiev * 60 GHz band. 5310c7dc45dSLuis R. Rodriguez * This resolution can be lowered and should be considered as we add 5320c7dc45dSLuis R. Rodriguez * regulatory rule support for other "bands". 5330c7dc45dSLuis R. Rodriguez **/ 5340c7dc45dSLuis R. Rodriguez static bool freq_in_rule_band(const struct ieee80211_freq_range *freq_range, 5350c7dc45dSLuis R. Rodriguez u32 freq_khz) 5360c7dc45dSLuis R. Rodriguez { 5370c7dc45dSLuis R. Rodriguez #define ONE_GHZ_IN_KHZ 1000000 53864629b9dSVladimir Kondratiev /* 53964629b9dSVladimir Kondratiev * From 802.11ad: directional multi-gigabit (DMG): 54064629b9dSVladimir Kondratiev * Pertaining to operation in a frequency band containing a channel 54164629b9dSVladimir Kondratiev * with the Channel starting frequency above 45 GHz. 54264629b9dSVladimir Kondratiev */ 54364629b9dSVladimir Kondratiev u32 limit = freq_khz > 45 * ONE_GHZ_IN_KHZ ? 54464629b9dSVladimir Kondratiev 10 * ONE_GHZ_IN_KHZ : 2 * ONE_GHZ_IN_KHZ; 54564629b9dSVladimir Kondratiev if (abs(freq_khz - freq_range->start_freq_khz) <= limit) 5460c7dc45dSLuis R. Rodriguez return true; 54764629b9dSVladimir Kondratiev if (abs(freq_khz - freq_range->end_freq_khz) <= limit) 5480c7dc45dSLuis R. Rodriguez return true; 5490c7dc45dSLuis R. Rodriguez return false; 5500c7dc45dSLuis R. Rodriguez #undef ONE_GHZ_IN_KHZ 5510c7dc45dSLuis R. Rodriguez } 5520c7dc45dSLuis R. Rodriguez 553fb1fc7adSLuis R. Rodriguez /* 554fb1fc7adSLuis R. Rodriguez * Helper for regdom_intersect(), this does the real 555fb1fc7adSLuis R. Rodriguez * mathematical intersection fun 556fb1fc7adSLuis R. Rodriguez */ 5571a919318SJohannes Berg static int reg_rules_intersect(const struct ieee80211_reg_rule *rule1, 5589c96477dSLuis R. Rodriguez const struct ieee80211_reg_rule *rule2, 5599c96477dSLuis R. Rodriguez struct ieee80211_reg_rule *intersected_rule) 5609c96477dSLuis R. Rodriguez { 5619c96477dSLuis R. Rodriguez const struct ieee80211_freq_range *freq_range1, *freq_range2; 5629c96477dSLuis R. Rodriguez struct ieee80211_freq_range *freq_range; 5639c96477dSLuis R. Rodriguez const struct ieee80211_power_rule *power_rule1, *power_rule2; 5649c96477dSLuis R. Rodriguez struct ieee80211_power_rule *power_rule; 5659c96477dSLuis R. Rodriguez u32 freq_diff; 5669c96477dSLuis R. Rodriguez 5679c96477dSLuis R. Rodriguez freq_range1 = &rule1->freq_range; 5689c96477dSLuis R. Rodriguez freq_range2 = &rule2->freq_range; 5699c96477dSLuis R. Rodriguez freq_range = &intersected_rule->freq_range; 5709c96477dSLuis R. Rodriguez 5719c96477dSLuis R. Rodriguez power_rule1 = &rule1->power_rule; 5729c96477dSLuis R. Rodriguez power_rule2 = &rule2->power_rule; 5739c96477dSLuis R. Rodriguez power_rule = &intersected_rule->power_rule; 5749c96477dSLuis R. Rodriguez 5759c96477dSLuis R. Rodriguez freq_range->start_freq_khz = max(freq_range1->start_freq_khz, 5769c96477dSLuis R. Rodriguez freq_range2->start_freq_khz); 5779c96477dSLuis R. Rodriguez freq_range->end_freq_khz = min(freq_range1->end_freq_khz, 5789c96477dSLuis R. Rodriguez freq_range2->end_freq_khz); 5799c96477dSLuis R. Rodriguez freq_range->max_bandwidth_khz = min(freq_range1->max_bandwidth_khz, 5809c96477dSLuis R. Rodriguez freq_range2->max_bandwidth_khz); 5819c96477dSLuis R. Rodriguez 5829c96477dSLuis R. Rodriguez freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz; 5839c96477dSLuis R. Rodriguez if (freq_range->max_bandwidth_khz > freq_diff) 5849c96477dSLuis R. Rodriguez freq_range->max_bandwidth_khz = freq_diff; 5859c96477dSLuis R. Rodriguez 5869c96477dSLuis R. Rodriguez power_rule->max_eirp = min(power_rule1->max_eirp, 5879c96477dSLuis R. Rodriguez power_rule2->max_eirp); 5889c96477dSLuis R. Rodriguez power_rule->max_antenna_gain = min(power_rule1->max_antenna_gain, 5899c96477dSLuis R. Rodriguez power_rule2->max_antenna_gain); 5909c96477dSLuis R. Rodriguez 5911a919318SJohannes Berg intersected_rule->flags = rule1->flags | rule2->flags; 5929c96477dSLuis R. Rodriguez 5939c96477dSLuis R. Rodriguez if (!is_valid_reg_rule(intersected_rule)) 5949c96477dSLuis R. Rodriguez return -EINVAL; 5959c96477dSLuis R. Rodriguez 5969c96477dSLuis R. Rodriguez return 0; 5979c96477dSLuis R. Rodriguez } 5989c96477dSLuis R. Rodriguez 5999c96477dSLuis R. Rodriguez /** 6009c96477dSLuis R. Rodriguez * regdom_intersect - do the intersection between two regulatory domains 6019c96477dSLuis R. Rodriguez * @rd1: first regulatory domain 6029c96477dSLuis R. Rodriguez * @rd2: second regulatory domain 6039c96477dSLuis R. Rodriguez * 6049c96477dSLuis R. Rodriguez * Use this function to get the intersection between two regulatory domains. 6059c96477dSLuis R. Rodriguez * Once completed we will mark the alpha2 for the rd as intersected, "98", 6069c96477dSLuis R. Rodriguez * as no one single alpha2 can represent this regulatory domain. 6079c96477dSLuis R. Rodriguez * 6089c96477dSLuis R. Rodriguez * Returns a pointer to the regulatory domain structure which will hold the 6099c96477dSLuis R. Rodriguez * resulting intersection of rules between rd1 and rd2. We will 6109c96477dSLuis R. Rodriguez * kzalloc() this structure for you. 6119c96477dSLuis R. Rodriguez */ 6121a919318SJohannes Berg static struct ieee80211_regdomain * 6131a919318SJohannes Berg regdom_intersect(const struct ieee80211_regdomain *rd1, 6149c96477dSLuis R. Rodriguez const struct ieee80211_regdomain *rd2) 6159c96477dSLuis R. Rodriguez { 6169c96477dSLuis R. Rodriguez int r, size_of_regd; 6179c96477dSLuis R. Rodriguez unsigned int x, y; 6189c96477dSLuis R. Rodriguez unsigned int num_rules = 0, rule_idx = 0; 6199c96477dSLuis R. Rodriguez const struct ieee80211_reg_rule *rule1, *rule2; 6209c96477dSLuis R. Rodriguez struct ieee80211_reg_rule *intersected_rule; 6219c96477dSLuis R. Rodriguez struct ieee80211_regdomain *rd; 6229c96477dSLuis R. Rodriguez /* This is just a dummy holder to help us count */ 62374f53cd8SJohannes Berg struct ieee80211_reg_rule dummy_rule; 6249c96477dSLuis R. Rodriguez 6259c96477dSLuis R. Rodriguez if (!rd1 || !rd2) 6269c96477dSLuis R. Rodriguez return NULL; 6279c96477dSLuis R. Rodriguez 628fb1fc7adSLuis R. Rodriguez /* 629fb1fc7adSLuis R. Rodriguez * First we get a count of the rules we'll need, then we actually 6309c96477dSLuis R. Rodriguez * build them. This is to so we can malloc() and free() a 6319c96477dSLuis R. Rodriguez * regdomain once. The reason we use reg_rules_intersect() here 6329c96477dSLuis R. Rodriguez * is it will return -EINVAL if the rule computed makes no sense. 633fb1fc7adSLuis R. Rodriguez * All rules that do check out OK are valid. 634fb1fc7adSLuis R. Rodriguez */ 6359c96477dSLuis R. Rodriguez 6369c96477dSLuis R. Rodriguez for (x = 0; x < rd1->n_reg_rules; x++) { 6379c96477dSLuis R. Rodriguez rule1 = &rd1->reg_rules[x]; 6389c96477dSLuis R. Rodriguez for (y = 0; y < rd2->n_reg_rules; y++) { 6399c96477dSLuis R. Rodriguez rule2 = &rd2->reg_rules[y]; 64074f53cd8SJohannes Berg if (!reg_rules_intersect(rule1, rule2, &dummy_rule)) 6419c96477dSLuis R. Rodriguez num_rules++; 6429c96477dSLuis R. Rodriguez } 6439c96477dSLuis R. Rodriguez } 6449c96477dSLuis R. Rodriguez 6459c96477dSLuis R. Rodriguez if (!num_rules) 6469c96477dSLuis R. Rodriguez return NULL; 6479c96477dSLuis R. Rodriguez 6489c96477dSLuis R. Rodriguez size_of_regd = sizeof(struct ieee80211_regdomain) + 64982f20856SJohannes Berg num_rules * sizeof(struct ieee80211_reg_rule); 6509c96477dSLuis R. Rodriguez 6519c96477dSLuis R. Rodriguez rd = kzalloc(size_of_regd, GFP_KERNEL); 6529c96477dSLuis R. Rodriguez if (!rd) 6539c96477dSLuis R. Rodriguez return NULL; 6549c96477dSLuis R. Rodriguez 6558a57fff0SJohannes Berg for (x = 0; x < rd1->n_reg_rules && rule_idx < num_rules; x++) { 6569c96477dSLuis R. Rodriguez rule1 = &rd1->reg_rules[x]; 6578a57fff0SJohannes Berg for (y = 0; y < rd2->n_reg_rules && rule_idx < num_rules; y++) { 6589c96477dSLuis R. Rodriguez rule2 = &rd2->reg_rules[y]; 659fb1fc7adSLuis R. Rodriguez /* 660fb1fc7adSLuis R. Rodriguez * This time around instead of using the stack lets 6619c96477dSLuis R. Rodriguez * write to the target rule directly saving ourselves 662fb1fc7adSLuis R. Rodriguez * a memcpy() 663fb1fc7adSLuis R. Rodriguez */ 6649c96477dSLuis R. Rodriguez intersected_rule = &rd->reg_rules[rule_idx]; 6651a919318SJohannes Berg r = reg_rules_intersect(rule1, rule2, intersected_rule); 666fb1fc7adSLuis R. Rodriguez /* 667fb1fc7adSLuis R. Rodriguez * No need to memset here the intersected rule here as 668fb1fc7adSLuis R. Rodriguez * we're not using the stack anymore 669fb1fc7adSLuis R. Rodriguez */ 6709c96477dSLuis R. Rodriguez if (r) 6719c96477dSLuis R. Rodriguez continue; 6729c96477dSLuis R. Rodriguez rule_idx++; 6739c96477dSLuis R. Rodriguez } 6749c96477dSLuis R. Rodriguez } 6759c96477dSLuis R. Rodriguez 6769c96477dSLuis R. Rodriguez if (rule_idx != num_rules) { 6779c96477dSLuis R. Rodriguez kfree(rd); 6789c96477dSLuis R. Rodriguez return NULL; 6799c96477dSLuis R. Rodriguez } 6809c96477dSLuis R. Rodriguez 6819c96477dSLuis R. Rodriguez rd->n_reg_rules = num_rules; 6829c96477dSLuis R. Rodriguez rd->alpha2[0] = '9'; 6839c96477dSLuis R. Rodriguez rd->alpha2[1] = '8'; 6849c96477dSLuis R. Rodriguez 6859c96477dSLuis R. Rodriguez return rd; 6869c96477dSLuis R. Rodriguez } 6879c96477dSLuis R. Rodriguez 688fb1fc7adSLuis R. Rodriguez /* 689fb1fc7adSLuis R. Rodriguez * XXX: add support for the rest of enum nl80211_reg_rule_flags, we may 690fb1fc7adSLuis R. Rodriguez * want to just have the channel structure use these 691fb1fc7adSLuis R. Rodriguez */ 692b2e1b302SLuis R. Rodriguez static u32 map_regdom_flags(u32 rd_flags) 693b2e1b302SLuis R. Rodriguez { 694b2e1b302SLuis R. Rodriguez u32 channel_flags = 0; 6958fe02e16SLuis R. Rodriguez if (rd_flags & NL80211_RRF_NO_IR_ALL) 6968fe02e16SLuis R. Rodriguez channel_flags |= IEEE80211_CHAN_NO_IR; 697b2e1b302SLuis R. Rodriguez if (rd_flags & NL80211_RRF_DFS) 698b2e1b302SLuis R. Rodriguez channel_flags |= IEEE80211_CHAN_RADAR; 69903f6b084SSeth Forshee if (rd_flags & NL80211_RRF_NO_OFDM) 70003f6b084SSeth Forshee channel_flags |= IEEE80211_CHAN_NO_OFDM; 701b2e1b302SLuis R. Rodriguez return channel_flags; 702b2e1b302SLuis R. Rodriguez } 703b2e1b302SLuis R. Rodriguez 704361c9c8bSJohannes Berg static const struct ieee80211_reg_rule * 705361c9c8bSJohannes Berg freq_reg_info_regd(struct wiphy *wiphy, u32 center_freq, 7065d885b99SJohannes Berg const struct ieee80211_regdomain *regd) 7078318d78aSJohannes Berg { 7088318d78aSJohannes Berg int i; 7090c7dc45dSLuis R. Rodriguez bool band_rule_found = false; 710038659e7SLuis R. Rodriguez bool bw_fits = false; 711038659e7SLuis R. Rodriguez 7123e0c3ff3SLuis R. Rodriguez if (!regd) 713361c9c8bSJohannes Berg return ERR_PTR(-EINVAL); 714b2e1b302SLuis R. Rodriguez 7153e0c3ff3SLuis R. Rodriguez for (i = 0; i < regd->n_reg_rules; i++) { 716b2e1b302SLuis R. Rodriguez const struct ieee80211_reg_rule *rr; 717b2e1b302SLuis R. Rodriguez const struct ieee80211_freq_range *fr = NULL; 718b2e1b302SLuis R. Rodriguez 7193e0c3ff3SLuis R. Rodriguez rr = ®d->reg_rules[i]; 720b2e1b302SLuis R. Rodriguez fr = &rr->freq_range; 7210c7dc45dSLuis R. Rodriguez 722fb1fc7adSLuis R. Rodriguez /* 723fb1fc7adSLuis R. Rodriguez * We only need to know if one frequency rule was 7240c7dc45dSLuis R. Rodriguez * was in center_freq's band, that's enough, so lets 725fb1fc7adSLuis R. Rodriguez * not overwrite it once found 726fb1fc7adSLuis R. Rodriguez */ 7270c7dc45dSLuis R. Rodriguez if (!band_rule_found) 7280c7dc45dSLuis R. Rodriguez band_rule_found = freq_in_rule_band(fr, center_freq); 7290c7dc45dSLuis R. Rodriguez 730fe7ef5e9SJohannes Berg bw_fits = reg_does_bw_fit(fr, center_freq, MHZ_TO_KHZ(20)); 7310c7dc45dSLuis R. Rodriguez 732361c9c8bSJohannes Berg if (band_rule_found && bw_fits) 733361c9c8bSJohannes Berg return rr; 7348318d78aSJohannes Berg } 7358318d78aSJohannes Berg 7360c7dc45dSLuis R. Rodriguez if (!band_rule_found) 737361c9c8bSJohannes Berg return ERR_PTR(-ERANGE); 7380c7dc45dSLuis R. Rodriguez 739361c9c8bSJohannes Berg return ERR_PTR(-EINVAL); 740b2e1b302SLuis R. Rodriguez } 741b2e1b302SLuis R. Rodriguez 742361c9c8bSJohannes Berg const struct ieee80211_reg_rule *freq_reg_info(struct wiphy *wiphy, 743361c9c8bSJohannes Berg u32 center_freq) 7441fa25e41SLuis R. Rodriguez { 7455d885b99SJohannes Berg const struct ieee80211_regdomain *regd; 746c492db37SJohannes Berg struct regulatory_request *lr = get_last_request(); 7471a919318SJohannes Berg 7485d885b99SJohannes Berg /* 7495d885b99SJohannes Berg * Follow the driver's regulatory domain, if present, unless a country 7505d885b99SJohannes Berg * IE has been processed or a user wants to help complaince further 7515d885b99SJohannes Berg */ 752c492db37SJohannes Berg if (lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && 753c492db37SJohannes Berg lr->initiator != NL80211_REGDOM_SET_BY_USER && 7545d885b99SJohannes Berg wiphy->regd) 755458f4f9eSJohannes Berg regd = get_wiphy_regdom(wiphy); 7565d885b99SJohannes Berg else 757458f4f9eSJohannes Berg regd = get_cfg80211_regdom(); 7585d885b99SJohannes Berg 759361c9c8bSJohannes Berg return freq_reg_info_regd(wiphy, center_freq, regd); 7601fa25e41SLuis R. Rodriguez } 7614f366c5dSJohn W. Linville EXPORT_SYMBOL(freq_reg_info); 762b2e1b302SLuis R. Rodriguez 763034c6d6eSLuis R. Rodriguez const char *reg_initiator_name(enum nl80211_reg_initiator initiator) 764926a0a09SLuis R. Rodriguez { 765926a0a09SLuis R. Rodriguez switch (initiator) { 766926a0a09SLuis R. Rodriguez case NL80211_REGDOM_SET_BY_CORE: 767034c6d6eSLuis R. Rodriguez return "core"; 768926a0a09SLuis R. Rodriguez case NL80211_REGDOM_SET_BY_USER: 769034c6d6eSLuis R. Rodriguez return "user"; 770926a0a09SLuis R. Rodriguez case NL80211_REGDOM_SET_BY_DRIVER: 771034c6d6eSLuis R. Rodriguez return "driver"; 772926a0a09SLuis R. Rodriguez case NL80211_REGDOM_SET_BY_COUNTRY_IE: 773034c6d6eSLuis R. Rodriguez return "country IE"; 774926a0a09SLuis R. Rodriguez default: 775926a0a09SLuis R. Rodriguez WARN_ON(1); 776034c6d6eSLuis R. Rodriguez return "bug"; 777926a0a09SLuis R. Rodriguez } 778926a0a09SLuis R. Rodriguez } 779034c6d6eSLuis R. Rodriguez EXPORT_SYMBOL(reg_initiator_name); 780e702d3cfSLuis R. Rodriguez 781034c6d6eSLuis R. Rodriguez #ifdef CONFIG_CFG80211_REG_DEBUG 782e702d3cfSLuis R. Rodriguez static void chan_reg_rule_print_dbg(struct ieee80211_channel *chan, 783e702d3cfSLuis R. Rodriguez const struct ieee80211_reg_rule *reg_rule) 784e702d3cfSLuis R. Rodriguez { 785e702d3cfSLuis R. Rodriguez const struct ieee80211_power_rule *power_rule; 786e702d3cfSLuis R. Rodriguez const struct ieee80211_freq_range *freq_range; 787e702d3cfSLuis R. Rodriguez char max_antenna_gain[32]; 788e702d3cfSLuis R. Rodriguez 789e702d3cfSLuis R. Rodriguez power_rule = ®_rule->power_rule; 790e702d3cfSLuis R. Rodriguez freq_range = ®_rule->freq_range; 791e702d3cfSLuis R. Rodriguez 792e702d3cfSLuis R. Rodriguez if (!power_rule->max_antenna_gain) 793e702d3cfSLuis R. Rodriguez snprintf(max_antenna_gain, 32, "N/A"); 794e702d3cfSLuis R. Rodriguez else 795e702d3cfSLuis R. Rodriguez snprintf(max_antenna_gain, 32, "%d", power_rule->max_antenna_gain); 796e702d3cfSLuis R. Rodriguez 797fe7ef5e9SJohannes Berg REG_DBG_PRINT("Updating information on frequency %d MHz with regulatory rule:\n", 798fe7ef5e9SJohannes Berg chan->center_freq); 799e702d3cfSLuis R. Rodriguez 80056e6786eSPavel Roskin REG_DBG_PRINT("%d KHz - %d KHz @ %d KHz), (%s mBi, %d mBm)\n", 8011a919318SJohannes Berg freq_range->start_freq_khz, freq_range->end_freq_khz, 8021a919318SJohannes Berg freq_range->max_bandwidth_khz, max_antenna_gain, 803e702d3cfSLuis R. Rodriguez power_rule->max_eirp); 804e702d3cfSLuis R. Rodriguez } 805e702d3cfSLuis R. Rodriguez #else 806e702d3cfSLuis R. Rodriguez static void chan_reg_rule_print_dbg(struct ieee80211_channel *chan, 807e702d3cfSLuis R. Rodriguez const struct ieee80211_reg_rule *reg_rule) 808e702d3cfSLuis R. Rodriguez { 809e702d3cfSLuis R. Rodriguez return; 810e702d3cfSLuis R. Rodriguez } 811926a0a09SLuis R. Rodriguez #endif 812926a0a09SLuis R. Rodriguez 813038659e7SLuis R. Rodriguez /* 814038659e7SLuis R. Rodriguez * Note that right now we assume the desired channel bandwidth 815038659e7SLuis R. Rodriguez * is always 20 MHz for each individual channel (HT40 uses 20 MHz 816fe7ef5e9SJohannes Berg * per channel, the primary and the extension channel). 817038659e7SLuis R. Rodriguez */ 8187ca43d03SLuis R. Rodriguez static void handle_channel(struct wiphy *wiphy, 8197ca43d03SLuis R. Rodriguez enum nl80211_reg_initiator initiator, 820fdc9d7b2SJohannes Berg struct ieee80211_channel *chan) 821b2e1b302SLuis R. Rodriguez { 822038659e7SLuis R. Rodriguez u32 flags, bw_flags = 0; 823b2e1b302SLuis R. Rodriguez const struct ieee80211_reg_rule *reg_rule = NULL; 824b2e1b302SLuis R. Rodriguez const struct ieee80211_power_rule *power_rule = NULL; 825038659e7SLuis R. Rodriguez const struct ieee80211_freq_range *freq_range = NULL; 826fe33eb39SLuis R. Rodriguez struct wiphy *request_wiphy = NULL; 827c492db37SJohannes Berg struct regulatory_request *lr = get_last_request(); 828a92a3ce7SLuis R. Rodriguez 829c492db37SJohannes Berg request_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx); 830a92a3ce7SLuis R. Rodriguez 831a92a3ce7SLuis R. Rodriguez flags = chan->orig_flags; 832b2e1b302SLuis R. Rodriguez 833361c9c8bSJohannes Berg reg_rule = freq_reg_info(wiphy, MHZ_TO_KHZ(chan->center_freq)); 834361c9c8bSJohannes Berg if (IS_ERR(reg_rule)) { 835ca4ffe8fSLuis R. Rodriguez /* 836ca4ffe8fSLuis R. Rodriguez * We will disable all channels that do not match our 83725985edcSLucas De Marchi * received regulatory rule unless the hint is coming 838ca4ffe8fSLuis R. Rodriguez * from a Country IE and the Country IE had no information 839ca4ffe8fSLuis R. Rodriguez * about a band. The IEEE 802.11 spec allows for an AP 840ca4ffe8fSLuis R. Rodriguez * to send only a subset of the regulatory rules allowed, 841ca4ffe8fSLuis R. Rodriguez * so an AP in the US that only supports 2.4 GHz may only send 842ca4ffe8fSLuis R. Rodriguez * a country IE with information for the 2.4 GHz band 843ca4ffe8fSLuis R. Rodriguez * while 5 GHz is still supported. 844ca4ffe8fSLuis R. Rodriguez */ 845ca4ffe8fSLuis R. Rodriguez if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE && 846361c9c8bSJohannes Berg PTR_ERR(reg_rule) == -ERANGE) 8478318d78aSJohannes Berg return; 8488318d78aSJohannes Berg 849cc493e4fSLuis R. Rodriguez if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER && 850cc493e4fSLuis R. Rodriguez request_wiphy && request_wiphy == wiphy && 851cc493e4fSLuis R. Rodriguez request_wiphy->flags & WIPHY_FLAG_STRICT_REGULATORY) { 852cc493e4fSLuis R. Rodriguez REG_DBG_PRINT("Disabling freq %d MHz for good\n", 853cc493e4fSLuis R. Rodriguez chan->center_freq); 854cc493e4fSLuis R. Rodriguez chan->orig_flags |= IEEE80211_CHAN_DISABLED; 855cc493e4fSLuis R. Rodriguez chan->flags = chan->orig_flags; 856cc493e4fSLuis R. Rodriguez } else { 857cc493e4fSLuis R. Rodriguez REG_DBG_PRINT("Disabling freq %d MHz\n", 858cc493e4fSLuis R. Rodriguez chan->center_freq); 859990de49fSJohannes Berg chan->flags |= IEEE80211_CHAN_DISABLED; 860cc493e4fSLuis R. Rodriguez } 861ca4ffe8fSLuis R. Rodriguez return; 862ca4ffe8fSLuis R. Rodriguez } 863ca4ffe8fSLuis R. Rodriguez 864fe7ef5e9SJohannes Berg chan_reg_rule_print_dbg(chan, reg_rule); 865e702d3cfSLuis R. Rodriguez 866b2e1b302SLuis R. Rodriguez power_rule = ®_rule->power_rule; 867038659e7SLuis R. Rodriguez freq_range = ®_rule->freq_range; 868038659e7SLuis R. Rodriguez 869038659e7SLuis R. Rodriguez if (freq_range->max_bandwidth_khz < MHZ_TO_KHZ(40)) 870038659e7SLuis R. Rodriguez bw_flags = IEEE80211_CHAN_NO_HT40; 871c7a6ee27SJohannes Berg if (freq_range->max_bandwidth_khz < MHZ_TO_KHZ(80)) 872c7a6ee27SJohannes Berg bw_flags |= IEEE80211_CHAN_NO_80MHZ; 873c7a6ee27SJohannes Berg if (freq_range->max_bandwidth_khz < MHZ_TO_KHZ(160)) 874c7a6ee27SJohannes Berg bw_flags |= IEEE80211_CHAN_NO_160MHZ; 875b2e1b302SLuis R. Rodriguez 876c492db37SJohannes Berg if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER && 877806a9e39SLuis R. Rodriguez request_wiphy && request_wiphy == wiphy && 8785be83de5SJohannes Berg request_wiphy->flags & WIPHY_FLAG_STRICT_REGULATORY) { 879fb1fc7adSLuis R. Rodriguez /* 88025985edcSLucas De Marchi * This guarantees the driver's requested regulatory domain 881f976376dSLuis R. Rodriguez * will always be used as a base for further regulatory 882fb1fc7adSLuis R. Rodriguez * settings 883fb1fc7adSLuis R. Rodriguez */ 884f976376dSLuis R. Rodriguez chan->flags = chan->orig_flags = 885038659e7SLuis R. Rodriguez map_regdom_flags(reg_rule->flags) | bw_flags; 886f976376dSLuis R. Rodriguez chan->max_antenna_gain = chan->orig_mag = 887f976376dSLuis R. Rodriguez (int) MBI_TO_DBI(power_rule->max_antenna_gain); 888279f0f55SFelix Fietkau chan->max_reg_power = chan->max_power = chan->orig_mpwr = 889f976376dSLuis R. Rodriguez (int) MBM_TO_DBM(power_rule->max_eirp); 890f976376dSLuis R. Rodriguez return; 891f976376dSLuis R. Rodriguez } 892f976376dSLuis R. Rodriguez 89304f39047SSimon Wunderlich chan->dfs_state = NL80211_DFS_USABLE; 89404f39047SSimon Wunderlich chan->dfs_state_entered = jiffies; 89504f39047SSimon Wunderlich 896aa3d7eefSRajkumar Manoharan chan->beacon_found = false; 897038659e7SLuis R. Rodriguez chan->flags = flags | bw_flags | map_regdom_flags(reg_rule->flags); 8981a919318SJohannes Berg chan->max_antenna_gain = 8991a919318SJohannes Berg min_t(int, chan->orig_mag, 9001a919318SJohannes Berg MBI_TO_DBI(power_rule->max_antenna_gain)); 901eccc068eSHong Wu chan->max_reg_power = (int) MBM_TO_DBM(power_rule->max_eirp); 9025e31fc08SStanislaw Gruszka if (chan->orig_mpwr) { 9035e31fc08SStanislaw Gruszka /* 9045e31fc08SStanislaw Gruszka * Devices that have their own custom regulatory domain 9055e31fc08SStanislaw Gruszka * but also use WIPHY_FLAG_STRICT_REGULATORY will follow the 9065e31fc08SStanislaw Gruszka * passed country IE power settings. 9075e31fc08SStanislaw Gruszka */ 9085e31fc08SStanislaw Gruszka if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE && 9095e31fc08SStanislaw Gruszka wiphy->flags & WIPHY_FLAG_CUSTOM_REGULATORY && 9105e31fc08SStanislaw Gruszka wiphy->flags & WIPHY_FLAG_STRICT_REGULATORY) 9115e31fc08SStanislaw Gruszka chan->max_power = chan->max_reg_power; 9125e31fc08SStanislaw Gruszka else 9135e31fc08SStanislaw Gruszka chan->max_power = min(chan->orig_mpwr, 9145e31fc08SStanislaw Gruszka chan->max_reg_power); 9155e31fc08SStanislaw Gruszka } else 9165e31fc08SStanislaw Gruszka chan->max_power = chan->max_reg_power; 9178318d78aSJohannes Berg } 9188318d78aSJohannes Berg 9197ca43d03SLuis R. Rodriguez static void handle_band(struct wiphy *wiphy, 920fdc9d7b2SJohannes Berg enum nl80211_reg_initiator initiator, 921fdc9d7b2SJohannes Berg struct ieee80211_supported_band *sband) 9228318d78aSJohannes Berg { 923a92a3ce7SLuis R. Rodriguez unsigned int i; 924a92a3ce7SLuis R. Rodriguez 925fdc9d7b2SJohannes Berg if (!sband) 926fdc9d7b2SJohannes Berg return; 9278318d78aSJohannes Berg 9288318d78aSJohannes Berg for (i = 0; i < sband->n_channels; i++) 929fdc9d7b2SJohannes Berg handle_channel(wiphy, initiator, &sband->channels[i]); 9308318d78aSJohannes Berg } 9318318d78aSJohannes Berg 93257b5ce07SLuis R. Rodriguez static bool reg_request_cell_base(struct regulatory_request *request) 93357b5ce07SLuis R. Rodriguez { 93457b5ce07SLuis R. Rodriguez if (request->initiator != NL80211_REGDOM_SET_BY_USER) 93557b5ce07SLuis R. Rodriguez return false; 9361a919318SJohannes Berg return request->user_reg_hint_type == NL80211_USER_REG_HINT_CELL_BASE; 93757b5ce07SLuis R. Rodriguez } 93857b5ce07SLuis R. Rodriguez 93957b5ce07SLuis R. Rodriguez bool reg_last_request_cell_base(void) 94057b5ce07SLuis R. Rodriguez { 94138fd2143SJohannes Berg return reg_request_cell_base(get_last_request()); 94257b5ce07SLuis R. Rodriguez } 94357b5ce07SLuis R. Rodriguez 94457b5ce07SLuis R. Rodriguez #ifdef CONFIG_CFG80211_CERTIFICATION_ONUS 94557b5ce07SLuis R. Rodriguez /* Core specific check */ 9462f92212bSJohannes Berg static enum reg_request_treatment 9472f92212bSJohannes Berg reg_ignore_cell_hint(struct regulatory_request *pending_request) 94857b5ce07SLuis R. Rodriguez { 949c492db37SJohannes Berg struct regulatory_request *lr = get_last_request(); 95057b5ce07SLuis R. Rodriguez 95157b5ce07SLuis R. Rodriguez if (!reg_num_devs_support_basehint) 9522f92212bSJohannes Berg return REG_REQ_IGNORE; 95357b5ce07SLuis R. Rodriguez 954c492db37SJohannes Berg if (reg_request_cell_base(lr) && 9551a919318SJohannes Berg !regdom_changes(pending_request->alpha2)) 9562f92212bSJohannes Berg return REG_REQ_ALREADY_SET; 9571a919318SJohannes Berg 9582f92212bSJohannes Berg return REG_REQ_OK; 95957b5ce07SLuis R. Rodriguez } 96057b5ce07SLuis R. Rodriguez 96157b5ce07SLuis R. Rodriguez /* Device specific check */ 96257b5ce07SLuis R. Rodriguez static bool reg_dev_ignore_cell_hint(struct wiphy *wiphy) 96357b5ce07SLuis R. Rodriguez { 9641a919318SJohannes Berg return !(wiphy->features & NL80211_FEATURE_CELL_BASE_REG_HINTS); 96557b5ce07SLuis R. Rodriguez } 96657b5ce07SLuis R. Rodriguez #else 96757b5ce07SLuis R. Rodriguez static int reg_ignore_cell_hint(struct regulatory_request *pending_request) 96857b5ce07SLuis R. Rodriguez { 9692f92212bSJohannes Berg return REG_REQ_IGNORE; 97057b5ce07SLuis R. Rodriguez } 9711a919318SJohannes Berg 9721a919318SJohannes Berg static bool reg_dev_ignore_cell_hint(struct wiphy *wiphy) 97357b5ce07SLuis R. Rodriguez { 97457b5ce07SLuis R. Rodriguez return true; 97557b5ce07SLuis R. Rodriguez } 97657b5ce07SLuis R. Rodriguez #endif 97757b5ce07SLuis R. Rodriguez 978fa1fb9cbSLuis R. Rodriguez static bool wiphy_strict_alpha2_regd(struct wiphy *wiphy) 979fa1fb9cbSLuis R. Rodriguez { 980fa1fb9cbSLuis R. Rodriguez if (wiphy->flags & WIPHY_FLAG_STRICT_REGULATORY && 981fa1fb9cbSLuis R. Rodriguez !(wiphy->flags & WIPHY_FLAG_CUSTOM_REGULATORY)) 982fa1fb9cbSLuis R. Rodriguez return true; 983fa1fb9cbSLuis R. Rodriguez return false; 984fa1fb9cbSLuis R. Rodriguez } 98557b5ce07SLuis R. Rodriguez 9867db90f4aSLuis R. Rodriguez static bool ignore_reg_update(struct wiphy *wiphy, 9877db90f4aSLuis R. Rodriguez enum nl80211_reg_initiator initiator) 98814b9815aSLuis R. Rodriguez { 989c492db37SJohannes Berg struct regulatory_request *lr = get_last_request(); 990c492db37SJohannes Berg 991c492db37SJohannes Berg if (!lr) { 992034c6d6eSLuis R. Rodriguez REG_DBG_PRINT("Ignoring regulatory request set by %s " 993034c6d6eSLuis R. Rodriguez "since last_request is not set\n", 994926a0a09SLuis R. Rodriguez reg_initiator_name(initiator)); 99514b9815aSLuis R. Rodriguez return true; 996926a0a09SLuis R. Rodriguez } 997926a0a09SLuis R. Rodriguez 9987db90f4aSLuis R. Rodriguez if (initiator == NL80211_REGDOM_SET_BY_CORE && 999926a0a09SLuis R. Rodriguez wiphy->flags & WIPHY_FLAG_CUSTOM_REGULATORY) { 1000034c6d6eSLuis R. Rodriguez REG_DBG_PRINT("Ignoring regulatory request set by %s " 1001034c6d6eSLuis R. Rodriguez "since the driver uses its own custom " 1002034c6d6eSLuis R. Rodriguez "regulatory domain\n", 1003926a0a09SLuis R. Rodriguez reg_initiator_name(initiator)); 100414b9815aSLuis R. Rodriguez return true; 1005926a0a09SLuis R. Rodriguez } 1006926a0a09SLuis R. Rodriguez 1007fb1fc7adSLuis R. Rodriguez /* 1008fb1fc7adSLuis R. Rodriguez * wiphy->regd will be set once the device has its own 1009fb1fc7adSLuis R. Rodriguez * desired regulatory domain set 1010fb1fc7adSLuis R. Rodriguez */ 1011fa1fb9cbSLuis R. Rodriguez if (wiphy_strict_alpha2_regd(wiphy) && !wiphy->regd && 1012749b527bSLuis R. Rodriguez initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && 1013c492db37SJohannes Berg !is_world_regdom(lr->alpha2)) { 1014034c6d6eSLuis R. Rodriguez REG_DBG_PRINT("Ignoring regulatory request set by %s " 1015034c6d6eSLuis R. Rodriguez "since the driver requires its own regulatory " 1016034c6d6eSLuis R. Rodriguez "domain to be set first\n", 1017926a0a09SLuis R. Rodriguez reg_initiator_name(initiator)); 101814b9815aSLuis R. Rodriguez return true; 1019926a0a09SLuis R. Rodriguez } 1020926a0a09SLuis R. Rodriguez 1021c492db37SJohannes Berg if (reg_request_cell_base(lr)) 102257b5ce07SLuis R. Rodriguez return reg_dev_ignore_cell_hint(wiphy); 102357b5ce07SLuis R. Rodriguez 102414b9815aSLuis R. Rodriguez return false; 102514b9815aSLuis R. Rodriguez } 102614b9815aSLuis R. Rodriguez 10273195e489SLuis R. Rodriguez static bool reg_is_world_roaming(struct wiphy *wiphy) 10283195e489SLuis R. Rodriguez { 10293195e489SLuis R. Rodriguez const struct ieee80211_regdomain *cr = get_cfg80211_regdom(); 10303195e489SLuis R. Rodriguez const struct ieee80211_regdomain *wr = get_wiphy_regdom(wiphy); 10313195e489SLuis R. Rodriguez struct regulatory_request *lr = get_last_request(); 10323195e489SLuis R. Rodriguez 10333195e489SLuis R. Rodriguez if (is_world_regdom(cr->alpha2) || (wr && is_world_regdom(wr->alpha2))) 10343195e489SLuis R. Rodriguez return true; 10353195e489SLuis R. Rodriguez 10363195e489SLuis R. Rodriguez if (lr && lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && 10373195e489SLuis R. Rodriguez wiphy->flags & WIPHY_FLAG_CUSTOM_REGULATORY) 10383195e489SLuis R. Rodriguez return true; 10393195e489SLuis R. Rodriguez 10403195e489SLuis R. Rodriguez return false; 10413195e489SLuis R. Rodriguez } 10423195e489SLuis R. Rodriguez 10431a919318SJohannes Berg static void handle_reg_beacon(struct wiphy *wiphy, unsigned int chan_idx, 1044e38f8a7aSLuis R. Rodriguez struct reg_beacon *reg_beacon) 1045e38f8a7aSLuis R. Rodriguez { 1046e38f8a7aSLuis R. Rodriguez struct ieee80211_supported_band *sband; 1047e38f8a7aSLuis R. Rodriguez struct ieee80211_channel *chan; 10486bad8766SLuis R. Rodriguez bool channel_changed = false; 10496bad8766SLuis R. Rodriguez struct ieee80211_channel chan_before; 1050e38f8a7aSLuis R. Rodriguez 1051e38f8a7aSLuis R. Rodriguez sband = wiphy->bands[reg_beacon->chan.band]; 1052e38f8a7aSLuis R. Rodriguez chan = &sband->channels[chan_idx]; 1053e38f8a7aSLuis R. Rodriguez 1054e38f8a7aSLuis R. Rodriguez if (likely(chan->center_freq != reg_beacon->chan.center_freq)) 1055e38f8a7aSLuis R. Rodriguez return; 1056e38f8a7aSLuis R. Rodriguez 10576bad8766SLuis R. Rodriguez if (chan->beacon_found) 10586bad8766SLuis R. Rodriguez return; 10596bad8766SLuis R. Rodriguez 10606bad8766SLuis R. Rodriguez chan->beacon_found = true; 10616bad8766SLuis R. Rodriguez 10620f500a5fSLuis R. Rodriguez if (!reg_is_world_roaming(wiphy)) 10630f500a5fSLuis R. Rodriguez return; 10640f500a5fSLuis R. Rodriguez 10655be83de5SJohannes Berg if (wiphy->flags & WIPHY_FLAG_DISABLE_BEACON_HINTS) 106637184244SLuis R. Rodriguez return; 106737184244SLuis R. Rodriguez 10686bad8766SLuis R. Rodriguez chan_before.center_freq = chan->center_freq; 10696bad8766SLuis R. Rodriguez chan_before.flags = chan->flags; 10706bad8766SLuis R. Rodriguez 10718fe02e16SLuis R. Rodriguez if (chan->flags & IEEE80211_CHAN_NO_IR) { 10728fe02e16SLuis R. Rodriguez chan->flags &= ~IEEE80211_CHAN_NO_IR; 10736bad8766SLuis R. Rodriguez channel_changed = true; 1074e38f8a7aSLuis R. Rodriguez } 1075e38f8a7aSLuis R. Rodriguez 10766bad8766SLuis R. Rodriguez if (channel_changed) 10776bad8766SLuis R. Rodriguez nl80211_send_beacon_hint_event(wiphy, &chan_before, chan); 1078e38f8a7aSLuis R. Rodriguez } 1079e38f8a7aSLuis R. Rodriguez 1080e38f8a7aSLuis R. Rodriguez /* 1081e38f8a7aSLuis R. Rodriguez * Called when a scan on a wiphy finds a beacon on 1082e38f8a7aSLuis R. Rodriguez * new channel 1083e38f8a7aSLuis R. Rodriguez */ 1084e38f8a7aSLuis R. Rodriguez static void wiphy_update_new_beacon(struct wiphy *wiphy, 1085e38f8a7aSLuis R. Rodriguez struct reg_beacon *reg_beacon) 1086e38f8a7aSLuis R. Rodriguez { 1087e38f8a7aSLuis R. Rodriguez unsigned int i; 1088e38f8a7aSLuis R. Rodriguez struct ieee80211_supported_band *sband; 1089e38f8a7aSLuis R. Rodriguez 1090e38f8a7aSLuis R. Rodriguez if (!wiphy->bands[reg_beacon->chan.band]) 1091e38f8a7aSLuis R. Rodriguez return; 1092e38f8a7aSLuis R. Rodriguez 1093e38f8a7aSLuis R. Rodriguez sband = wiphy->bands[reg_beacon->chan.band]; 1094e38f8a7aSLuis R. Rodriguez 1095e38f8a7aSLuis R. Rodriguez for (i = 0; i < sband->n_channels; i++) 1096e38f8a7aSLuis R. Rodriguez handle_reg_beacon(wiphy, i, reg_beacon); 1097e38f8a7aSLuis R. Rodriguez } 1098e38f8a7aSLuis R. Rodriguez 1099e38f8a7aSLuis R. Rodriguez /* 1100e38f8a7aSLuis R. Rodriguez * Called upon reg changes or a new wiphy is added 1101e38f8a7aSLuis R. Rodriguez */ 1102e38f8a7aSLuis R. Rodriguez static void wiphy_update_beacon_reg(struct wiphy *wiphy) 1103e38f8a7aSLuis R. Rodriguez { 1104e38f8a7aSLuis R. Rodriguez unsigned int i; 1105e38f8a7aSLuis R. Rodriguez struct ieee80211_supported_band *sband; 1106e38f8a7aSLuis R. Rodriguez struct reg_beacon *reg_beacon; 1107e38f8a7aSLuis R. Rodriguez 1108e38f8a7aSLuis R. Rodriguez list_for_each_entry(reg_beacon, ®_beacon_list, list) { 1109e38f8a7aSLuis R. Rodriguez if (!wiphy->bands[reg_beacon->chan.band]) 1110e38f8a7aSLuis R. Rodriguez continue; 1111e38f8a7aSLuis R. Rodriguez sband = wiphy->bands[reg_beacon->chan.band]; 1112e38f8a7aSLuis R. Rodriguez for (i = 0; i < sband->n_channels; i++) 1113e38f8a7aSLuis R. Rodriguez handle_reg_beacon(wiphy, i, reg_beacon); 1114e38f8a7aSLuis R. Rodriguez } 1115e38f8a7aSLuis R. Rodriguez } 1116e38f8a7aSLuis R. Rodriguez 1117e38f8a7aSLuis R. Rodriguez /* Reap the advantages of previously found beacons */ 1118e38f8a7aSLuis R. Rodriguez static void reg_process_beacons(struct wiphy *wiphy) 1119e38f8a7aSLuis R. Rodriguez { 1120b1ed8dddSLuis R. Rodriguez /* 1121b1ed8dddSLuis R. Rodriguez * Means we are just firing up cfg80211, so no beacons would 1122b1ed8dddSLuis R. Rodriguez * have been processed yet. 1123b1ed8dddSLuis R. Rodriguez */ 1124b1ed8dddSLuis R. Rodriguez if (!last_request) 1125b1ed8dddSLuis R. Rodriguez return; 1126e38f8a7aSLuis R. Rodriguez wiphy_update_beacon_reg(wiphy); 1127e38f8a7aSLuis R. Rodriguez } 1128e38f8a7aSLuis R. Rodriguez 11291a919318SJohannes Berg static bool is_ht40_allowed(struct ieee80211_channel *chan) 1130038659e7SLuis R. Rodriguez { 1131038659e7SLuis R. Rodriguez if (!chan) 1132038659e7SLuis R. Rodriguez return false; 11331a919318SJohannes Berg if (chan->flags & IEEE80211_CHAN_DISABLED) 11341a919318SJohannes Berg return false; 11351a919318SJohannes Berg /* This would happen when regulatory rules disallow HT40 completely */ 113655b183adSFelix Fietkau if ((chan->flags & IEEE80211_CHAN_NO_HT40) == IEEE80211_CHAN_NO_HT40) 113755b183adSFelix Fietkau return false; 113855b183adSFelix Fietkau return true; 1139038659e7SLuis R. Rodriguez } 1140038659e7SLuis R. Rodriguez 1141038659e7SLuis R. Rodriguez static void reg_process_ht_flags_channel(struct wiphy *wiphy, 1142fdc9d7b2SJohannes Berg struct ieee80211_channel *channel) 1143038659e7SLuis R. Rodriguez { 1144fdc9d7b2SJohannes Berg struct ieee80211_supported_band *sband = wiphy->bands[channel->band]; 1145038659e7SLuis R. Rodriguez struct ieee80211_channel *channel_before = NULL, *channel_after = NULL; 1146038659e7SLuis R. Rodriguez unsigned int i; 1147038659e7SLuis R. Rodriguez 11481a919318SJohannes Berg if (!is_ht40_allowed(channel)) { 1149038659e7SLuis R. Rodriguez channel->flags |= IEEE80211_CHAN_NO_HT40; 1150038659e7SLuis R. Rodriguez return; 1151038659e7SLuis R. Rodriguez } 1152038659e7SLuis R. Rodriguez 1153038659e7SLuis R. Rodriguez /* 1154038659e7SLuis R. Rodriguez * We need to ensure the extension channels exist to 1155038659e7SLuis R. Rodriguez * be able to use HT40- or HT40+, this finds them (or not) 1156038659e7SLuis R. Rodriguez */ 1157038659e7SLuis R. Rodriguez for (i = 0; i < sband->n_channels; i++) { 1158038659e7SLuis R. Rodriguez struct ieee80211_channel *c = &sband->channels[i]; 11591a919318SJohannes Berg 1160038659e7SLuis R. Rodriguez if (c->center_freq == (channel->center_freq - 20)) 1161038659e7SLuis R. Rodriguez channel_before = c; 1162038659e7SLuis R. Rodriguez if (c->center_freq == (channel->center_freq + 20)) 1163038659e7SLuis R. Rodriguez channel_after = c; 1164038659e7SLuis R. Rodriguez } 1165038659e7SLuis R. Rodriguez 1166038659e7SLuis R. Rodriguez /* 1167038659e7SLuis R. Rodriguez * Please note that this assumes target bandwidth is 20 MHz, 1168038659e7SLuis R. Rodriguez * if that ever changes we also need to change the below logic 1169038659e7SLuis R. Rodriguez * to include that as well. 1170038659e7SLuis R. Rodriguez */ 11711a919318SJohannes Berg if (!is_ht40_allowed(channel_before)) 1172689da1b3SLuis R. Rodriguez channel->flags |= IEEE80211_CHAN_NO_HT40MINUS; 1173038659e7SLuis R. Rodriguez else 1174689da1b3SLuis R. Rodriguez channel->flags &= ~IEEE80211_CHAN_NO_HT40MINUS; 1175038659e7SLuis R. Rodriguez 11761a919318SJohannes Berg if (!is_ht40_allowed(channel_after)) 1177689da1b3SLuis R. Rodriguez channel->flags |= IEEE80211_CHAN_NO_HT40PLUS; 1178038659e7SLuis R. Rodriguez else 1179689da1b3SLuis R. Rodriguez channel->flags &= ~IEEE80211_CHAN_NO_HT40PLUS; 1180038659e7SLuis R. Rodriguez } 1181038659e7SLuis R. Rodriguez 1182038659e7SLuis R. Rodriguez static void reg_process_ht_flags_band(struct wiphy *wiphy, 1183fdc9d7b2SJohannes Berg struct ieee80211_supported_band *sband) 1184038659e7SLuis R. Rodriguez { 1185038659e7SLuis R. Rodriguez unsigned int i; 1186038659e7SLuis R. Rodriguez 1187fdc9d7b2SJohannes Berg if (!sband) 1188fdc9d7b2SJohannes Berg return; 1189038659e7SLuis R. Rodriguez 1190038659e7SLuis R. Rodriguez for (i = 0; i < sband->n_channels; i++) 1191fdc9d7b2SJohannes Berg reg_process_ht_flags_channel(wiphy, &sband->channels[i]); 1192038659e7SLuis R. Rodriguez } 1193038659e7SLuis R. Rodriguez 1194038659e7SLuis R. Rodriguez static void reg_process_ht_flags(struct wiphy *wiphy) 1195038659e7SLuis R. Rodriguez { 1196038659e7SLuis R. Rodriguez enum ieee80211_band band; 1197038659e7SLuis R. Rodriguez 1198038659e7SLuis R. Rodriguez if (!wiphy) 1199038659e7SLuis R. Rodriguez return; 1200038659e7SLuis R. Rodriguez 1201fdc9d7b2SJohannes Berg for (band = 0; band < IEEE80211_NUM_BANDS; band++) 1202fdc9d7b2SJohannes Berg reg_process_ht_flags_band(wiphy, wiphy->bands[band]); 1203038659e7SLuis R. Rodriguez } 1204038659e7SLuis R. Rodriguez 1205eac03e38SSven Neumann static void wiphy_update_regulatory(struct wiphy *wiphy, 12067db90f4aSLuis R. Rodriguez enum nl80211_reg_initiator initiator) 12078318d78aSJohannes Berg { 12088318d78aSJohannes Berg enum ieee80211_band band; 1209c492db37SJohannes Berg struct regulatory_request *lr = get_last_request(); 1210eac03e38SSven Neumann 12117db90f4aSLuis R. Rodriguez if (ignore_reg_update(wiphy, initiator)) 1212a203c2aaSSven Neumann return; 1213a203c2aaSSven Neumann 1214c492db37SJohannes Berg lr->dfs_region = get_cfg80211_regdom()->dfs_region; 1215b68e6b3bSLuis R. Rodriguez 1216fdc9d7b2SJohannes Berg for (band = 0; band < IEEE80211_NUM_BANDS; band++) 1217fdc9d7b2SJohannes Berg handle_band(wiphy, initiator, wiphy->bands[band]); 1218a203c2aaSSven Neumann 1219e38f8a7aSLuis R. Rodriguez reg_process_beacons(wiphy); 1220038659e7SLuis R. Rodriguez reg_process_ht_flags(wiphy); 12211a919318SJohannes Berg 1222b2e1b302SLuis R. Rodriguez if (wiphy->reg_notifier) 1223c492db37SJohannes Berg wiphy->reg_notifier(wiphy, lr); 1224b2e1b302SLuis R. Rodriguez } 1225b2e1b302SLuis R. Rodriguez 1226d7549cbbSSven Neumann static void update_all_wiphy_regulatory(enum nl80211_reg_initiator initiator) 1227d7549cbbSSven Neumann { 1228d7549cbbSSven Neumann struct cfg80211_registered_device *rdev; 12294a38994fSRajkumar Manoharan struct wiphy *wiphy; 1230d7549cbbSSven Neumann 12315fe231e8SJohannes Berg ASSERT_RTNL(); 1232458f4f9eSJohannes Berg 12334a38994fSRajkumar Manoharan list_for_each_entry(rdev, &cfg80211_rdev_list, list) { 12344a38994fSRajkumar Manoharan wiphy = &rdev->wiphy; 12354a38994fSRajkumar Manoharan wiphy_update_regulatory(wiphy, initiator); 12364a38994fSRajkumar Manoharan /* 12374a38994fSRajkumar Manoharan * Regulatory updates set by CORE are ignored for custom 12384a38994fSRajkumar Manoharan * regulatory cards. Let us notify the changes to the driver, 12394a38994fSRajkumar Manoharan * as some drivers used this to restore its orig_* reg domain. 12404a38994fSRajkumar Manoharan */ 12414a38994fSRajkumar Manoharan if (initiator == NL80211_REGDOM_SET_BY_CORE && 12424a38994fSRajkumar Manoharan wiphy->flags & WIPHY_FLAG_CUSTOM_REGULATORY && 12434a38994fSRajkumar Manoharan wiphy->reg_notifier) 1244c492db37SJohannes Berg wiphy->reg_notifier(wiphy, get_last_request()); 12454a38994fSRajkumar Manoharan } 1246d7549cbbSSven Neumann } 1247d7549cbbSSven Neumann 12481fa25e41SLuis R. Rodriguez static void handle_channel_custom(struct wiphy *wiphy, 1249fdc9d7b2SJohannes Berg struct ieee80211_channel *chan, 12501fa25e41SLuis R. Rodriguez const struct ieee80211_regdomain *regd) 12511fa25e41SLuis R. Rodriguez { 1252038659e7SLuis R. Rodriguez u32 bw_flags = 0; 12531fa25e41SLuis R. Rodriguez const struct ieee80211_reg_rule *reg_rule = NULL; 12541fa25e41SLuis R. Rodriguez const struct ieee80211_power_rule *power_rule = NULL; 1255038659e7SLuis R. Rodriguez const struct ieee80211_freq_range *freq_range = NULL; 12561fa25e41SLuis R. Rodriguez 1257361c9c8bSJohannes Berg reg_rule = freq_reg_info_regd(wiphy, MHZ_TO_KHZ(chan->center_freq), 1258038659e7SLuis R. Rodriguez regd); 12591fa25e41SLuis R. Rodriguez 1260361c9c8bSJohannes Berg if (IS_ERR(reg_rule)) { 1261fe7ef5e9SJohannes Berg REG_DBG_PRINT("Disabling freq %d MHz as custom regd has no rule that fits it\n", 1262fe7ef5e9SJohannes Berg chan->center_freq); 1263cc493e4fSLuis R. Rodriguez chan->orig_flags |= IEEE80211_CHAN_DISABLED; 1264cc493e4fSLuis R. Rodriguez chan->flags = chan->orig_flags; 12651fa25e41SLuis R. Rodriguez return; 12661fa25e41SLuis R. Rodriguez } 12671fa25e41SLuis R. Rodriguez 1268fe7ef5e9SJohannes Berg chan_reg_rule_print_dbg(chan, reg_rule); 1269e702d3cfSLuis R. Rodriguez 12701fa25e41SLuis R. Rodriguez power_rule = ®_rule->power_rule; 1271038659e7SLuis R. Rodriguez freq_range = ®_rule->freq_range; 12721fa25e41SLuis R. Rodriguez 1273038659e7SLuis R. Rodriguez if (freq_range->max_bandwidth_khz < MHZ_TO_KHZ(40)) 1274038659e7SLuis R. Rodriguez bw_flags = IEEE80211_CHAN_NO_HT40; 1275c7a6ee27SJohannes Berg if (freq_range->max_bandwidth_khz < MHZ_TO_KHZ(80)) 1276c7a6ee27SJohannes Berg bw_flags |= IEEE80211_CHAN_NO_80MHZ; 1277c7a6ee27SJohannes Berg if (freq_range->max_bandwidth_khz < MHZ_TO_KHZ(160)) 1278c7a6ee27SJohannes Berg bw_flags |= IEEE80211_CHAN_NO_160MHZ; 1279038659e7SLuis R. Rodriguez 1280038659e7SLuis R. Rodriguez chan->flags |= map_regdom_flags(reg_rule->flags) | bw_flags; 12811fa25e41SLuis R. Rodriguez chan->max_antenna_gain = (int) MBI_TO_DBI(power_rule->max_antenna_gain); 1282279f0f55SFelix Fietkau chan->max_reg_power = chan->max_power = 1283279f0f55SFelix Fietkau (int) MBM_TO_DBM(power_rule->max_eirp); 12841fa25e41SLuis R. Rodriguez } 12851fa25e41SLuis R. Rodriguez 1286fdc9d7b2SJohannes Berg static void handle_band_custom(struct wiphy *wiphy, 1287fdc9d7b2SJohannes Berg struct ieee80211_supported_band *sband, 12881fa25e41SLuis R. Rodriguez const struct ieee80211_regdomain *regd) 12891fa25e41SLuis R. Rodriguez { 12901fa25e41SLuis R. Rodriguez unsigned int i; 12911fa25e41SLuis R. Rodriguez 1292fdc9d7b2SJohannes Berg if (!sband) 1293fdc9d7b2SJohannes Berg return; 12941fa25e41SLuis R. Rodriguez 12951fa25e41SLuis R. Rodriguez for (i = 0; i < sband->n_channels; i++) 1296fdc9d7b2SJohannes Berg handle_channel_custom(wiphy, &sband->channels[i], regd); 12971fa25e41SLuis R. Rodriguez } 12981fa25e41SLuis R. Rodriguez 12991fa25e41SLuis R. Rodriguez /* Used by drivers prior to wiphy registration */ 13001fa25e41SLuis R. Rodriguez void wiphy_apply_custom_regulatory(struct wiphy *wiphy, 13011fa25e41SLuis R. Rodriguez const struct ieee80211_regdomain *regd) 13021fa25e41SLuis R. Rodriguez { 13031fa25e41SLuis R. Rodriguez enum ieee80211_band band; 1304bbcf3f02SLuis R. Rodriguez unsigned int bands_set = 0; 1305ac46d48eSLuis R. Rodriguez 1306222ea581SLuis R. Rodriguez WARN(!(wiphy->flags & WIPHY_FLAG_CUSTOM_REGULATORY), 1307222ea581SLuis R. Rodriguez "wiphy should have WIPHY_FLAG_CUSTOM_REGULATORY\n"); 1308222ea581SLuis R. Rodriguez wiphy->flags |= WIPHY_FLAG_CUSTOM_REGULATORY; 1309222ea581SLuis R. Rodriguez 13101fa25e41SLuis R. Rodriguez for (band = 0; band < IEEE80211_NUM_BANDS; band++) { 1311bbcf3f02SLuis R. Rodriguez if (!wiphy->bands[band]) 1312bbcf3f02SLuis R. Rodriguez continue; 1313fdc9d7b2SJohannes Berg handle_band_custom(wiphy, wiphy->bands[band], regd); 1314bbcf3f02SLuis R. Rodriguez bands_set++; 13151fa25e41SLuis R. Rodriguez } 1316bbcf3f02SLuis R. Rodriguez 1317bbcf3f02SLuis R. Rodriguez /* 1318bbcf3f02SLuis R. Rodriguez * no point in calling this if it won't have any effect 13191a919318SJohannes Berg * on your device's supported bands. 1320bbcf3f02SLuis R. Rodriguez */ 1321bbcf3f02SLuis R. Rodriguez WARN_ON(!bands_set); 13221fa25e41SLuis R. Rodriguez } 13231fa25e41SLuis R. Rodriguez EXPORT_SYMBOL(wiphy_apply_custom_regulatory); 13241fa25e41SLuis R. Rodriguez 132584fa4f43SJohannes Berg /* This has the logic which determines when a new request 132684fa4f43SJohannes Berg * should be ignored. */ 13272f92212bSJohannes Berg static enum reg_request_treatment 13282f92212bSJohannes Berg get_reg_request_treatment(struct wiphy *wiphy, 13292f92cd2eSLuis R. Rodriguez struct regulatory_request *pending_request) 133084fa4f43SJohannes Berg { 1331806a9e39SLuis R. Rodriguez struct wiphy *last_wiphy = NULL; 1332c492db37SJohannes Berg struct regulatory_request *lr = get_last_request(); 1333761cf7ecSLuis R. Rodriguez 133484fa4f43SJohannes Berg /* All initial requests are respected */ 1335c492db37SJohannes Berg if (!lr) 13362f92212bSJohannes Berg return REG_REQ_OK; 133784fa4f43SJohannes Berg 13382f92cd2eSLuis R. Rodriguez switch (pending_request->initiator) { 13397db90f4aSLuis R. Rodriguez case NL80211_REGDOM_SET_BY_CORE: 13402f92212bSJohannes Berg return REG_REQ_OK; 13417db90f4aSLuis R. Rodriguez case NL80211_REGDOM_SET_BY_COUNTRY_IE: 1342c492db37SJohannes Berg if (reg_request_cell_base(lr)) { 134357b5ce07SLuis R. Rodriguez /* Trust a Cell base station over the AP's country IE */ 134457b5ce07SLuis R. Rodriguez if (regdom_changes(pending_request->alpha2)) 13452f92212bSJohannes Berg return REG_REQ_IGNORE; 13462f92212bSJohannes Berg return REG_REQ_ALREADY_SET; 134757b5ce07SLuis R. Rodriguez } 134857b5ce07SLuis R. Rodriguez 1349c492db37SJohannes Berg last_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx); 1350806a9e39SLuis R. Rodriguez 13512f92cd2eSLuis R. Rodriguez if (unlikely(!is_an_alpha2(pending_request->alpha2))) 135284fa4f43SJohannes Berg return -EINVAL; 1353c492db37SJohannes Berg if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) { 1354806a9e39SLuis R. Rodriguez if (last_wiphy != wiphy) { 135584fa4f43SJohannes Berg /* 135684fa4f43SJohannes Berg * Two cards with two APs claiming different 13571fe90b03SThadeu Lima de Souza Cascardo * Country IE alpha2s. We could 135884fa4f43SJohannes Berg * intersect them, but that seems unlikely 135984fa4f43SJohannes Berg * to be correct. Reject second one for now. 136084fa4f43SJohannes Berg */ 13612f92cd2eSLuis R. Rodriguez if (regdom_changes(pending_request->alpha2)) 13622f92212bSJohannes Berg return REG_REQ_IGNORE; 13632f92212bSJohannes Berg return REG_REQ_ALREADY_SET; 136484fa4f43SJohannes Berg } 1365fb1fc7adSLuis R. Rodriguez /* 1366fb1fc7adSLuis R. Rodriguez * Two consecutive Country IE hints on the same wiphy. 1367fb1fc7adSLuis R. Rodriguez * This should be picked up early by the driver/stack 1368fb1fc7adSLuis R. Rodriguez */ 13692f92cd2eSLuis R. Rodriguez if (WARN_ON(regdom_changes(pending_request->alpha2))) 13702f92212bSJohannes Berg return REG_REQ_OK; 13712f92212bSJohannes Berg return REG_REQ_ALREADY_SET; 137284fa4f43SJohannes Berg } 13733430140aSJohannes Berg return REG_REQ_OK; 13747db90f4aSLuis R. Rodriguez case NL80211_REGDOM_SET_BY_DRIVER: 1375c492db37SJohannes Berg if (lr->initiator == NL80211_REGDOM_SET_BY_CORE) { 13762f92cd2eSLuis R. Rodriguez if (regdom_changes(pending_request->alpha2)) 13772f92212bSJohannes Berg return REG_REQ_OK; 13782f92212bSJohannes Berg return REG_REQ_ALREADY_SET; 1379e74b1e7fSLuis R. Rodriguez } 1380fff32c04SLuis R. Rodriguez 1381fff32c04SLuis R. Rodriguez /* 1382fff32c04SLuis R. Rodriguez * This would happen if you unplug and plug your card 1383fff32c04SLuis R. Rodriguez * back in or if you add a new device for which the previously 1384fff32c04SLuis R. Rodriguez * loaded card also agrees on the regulatory domain. 1385fff32c04SLuis R. Rodriguez */ 1386c492db37SJohannes Berg if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER && 13872f92cd2eSLuis R. Rodriguez !regdom_changes(pending_request->alpha2)) 13882f92212bSJohannes Berg return REG_REQ_ALREADY_SET; 1389fff32c04SLuis R. Rodriguez 13902f92212bSJohannes Berg return REG_REQ_INTERSECT; 13917db90f4aSLuis R. Rodriguez case NL80211_REGDOM_SET_BY_USER: 139257b5ce07SLuis R. Rodriguez if (reg_request_cell_base(pending_request)) 139357b5ce07SLuis R. Rodriguez return reg_ignore_cell_hint(pending_request); 139457b5ce07SLuis R. Rodriguez 1395c492db37SJohannes Berg if (reg_request_cell_base(lr)) 13962f92212bSJohannes Berg return REG_REQ_IGNORE; 139757b5ce07SLuis R. Rodriguez 1398c492db37SJohannes Berg if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) 13992f92212bSJohannes Berg return REG_REQ_INTERSECT; 1400fb1fc7adSLuis R. Rodriguez /* 1401fb1fc7adSLuis R. Rodriguez * If the user knows better the user should set the regdom 1402fb1fc7adSLuis R. Rodriguez * to their country before the IE is picked up 1403fb1fc7adSLuis R. Rodriguez */ 1404c492db37SJohannes Berg if (lr->initiator == NL80211_REGDOM_SET_BY_USER && 1405c492db37SJohannes Berg lr->intersect) 14062f92212bSJohannes Berg return REG_REQ_IGNORE; 1407fb1fc7adSLuis R. Rodriguez /* 1408fb1fc7adSLuis R. Rodriguez * Process user requests only after previous user/driver/core 1409fb1fc7adSLuis R. Rodriguez * requests have been processed 1410fb1fc7adSLuis R. Rodriguez */ 1411c492db37SJohannes Berg if ((lr->initiator == NL80211_REGDOM_SET_BY_CORE || 1412c492db37SJohannes Berg lr->initiator == NL80211_REGDOM_SET_BY_DRIVER || 1413c492db37SJohannes Berg lr->initiator == NL80211_REGDOM_SET_BY_USER) && 1414c492db37SJohannes Berg regdom_changes(lr->alpha2)) 14152f92212bSJohannes Berg return REG_REQ_IGNORE; 14165eebade6SLuis R. Rodriguez 1417baeb66feSJohn W. Linville if (!regdom_changes(pending_request->alpha2)) 14182f92212bSJohannes Berg return REG_REQ_ALREADY_SET; 1419e74b1e7fSLuis R. Rodriguez 14202f92212bSJohannes Berg return REG_REQ_OK; 142184fa4f43SJohannes Berg } 142284fa4f43SJohannes Berg 14232f92212bSJohannes Berg return REG_REQ_IGNORE; 142484fa4f43SJohannes Berg } 142584fa4f43SJohannes Berg 1426b2e253cfSLuis R. Rodriguez static void reg_set_request_processed(void) 1427b2e253cfSLuis R. Rodriguez { 1428b2e253cfSLuis R. Rodriguez bool need_more_processing = false; 1429c492db37SJohannes Berg struct regulatory_request *lr = get_last_request(); 1430b2e253cfSLuis R. Rodriguez 1431c492db37SJohannes Berg lr->processed = true; 1432b2e253cfSLuis R. Rodriguez 1433b2e253cfSLuis R. Rodriguez spin_lock(®_requests_lock); 1434b2e253cfSLuis R. Rodriguez if (!list_empty(®_requests_list)) 1435b2e253cfSLuis R. Rodriguez need_more_processing = true; 1436b2e253cfSLuis R. Rodriguez spin_unlock(®_requests_lock); 1437b2e253cfSLuis R. Rodriguez 1438c492db37SJohannes Berg if (lr->initiator == NL80211_REGDOM_SET_BY_USER) 1439fe20b39eSEliad Peller cancel_delayed_work(®_timeout); 1440a90c7a31SLuis R. Rodriguez 1441b2e253cfSLuis R. Rodriguez if (need_more_processing) 1442b2e253cfSLuis R. Rodriguez schedule_work(®_work); 1443b2e253cfSLuis R. Rodriguez } 1444b2e253cfSLuis R. Rodriguez 1445d1c96a9aSLuis R. Rodriguez /** 1446d1c96a9aSLuis R. Rodriguez * __regulatory_hint - hint to the wireless core a regulatory domain 1447d1c96a9aSLuis R. Rodriguez * @wiphy: if the hint comes from country information from an AP, this 1448d1c96a9aSLuis R. Rodriguez * is required to be set to the wiphy that received the information 144928da32d7SLuis R. Rodriguez * @pending_request: the regulatory request currently being processed 1450d1c96a9aSLuis R. Rodriguez * 1451d1c96a9aSLuis R. Rodriguez * The Wireless subsystem can use this function to hint to the wireless core 145228da32d7SLuis R. Rodriguez * what it believes should be the current regulatory domain. 1453d1c96a9aSLuis R. Rodriguez * 14542f92212bSJohannes Berg * Returns one of the different reg request treatment values. 1455d1c96a9aSLuis R. Rodriguez */ 14562f92212bSJohannes Berg static enum reg_request_treatment 14572f92212bSJohannes Berg __regulatory_hint(struct wiphy *wiphy, 145828da32d7SLuis R. Rodriguez struct regulatory_request *pending_request) 1459b2e1b302SLuis R. Rodriguez { 1460e9763c3cSJohannes Berg const struct ieee80211_regdomain *regd; 14619c96477dSLuis R. Rodriguez bool intersect = false; 14622f92212bSJohannes Berg enum reg_request_treatment treatment; 1463c492db37SJohannes Berg struct regulatory_request *lr; 1464b2e1b302SLuis R. Rodriguez 14652f92212bSJohannes Berg treatment = get_reg_request_treatment(wiphy, pending_request); 1466761cf7ecSLuis R. Rodriguez 14672f92212bSJohannes Berg switch (treatment) { 14682f92212bSJohannes Berg case REG_REQ_INTERSECT: 14697db90f4aSLuis R. Rodriguez if (pending_request->initiator == 14707db90f4aSLuis R. Rodriguez NL80211_REGDOM_SET_BY_DRIVER) { 1471458f4f9eSJohannes Berg regd = reg_copy_regd(get_cfg80211_regdom()); 1472e9763c3cSJohannes Berg if (IS_ERR(regd)) { 1473d951c1ddSLuis R. Rodriguez kfree(pending_request); 1474e9763c3cSJohannes Berg return PTR_ERR(regd); 14753e0c3ff3SLuis R. Rodriguez } 1476458f4f9eSJohannes Berg rcu_assign_pointer(wiphy->regd, regd); 1477d951c1ddSLuis R. Rodriguez } 14783e0c3ff3SLuis R. Rodriguez intersect = true; 14792f92212bSJohannes Berg break; 14802f92212bSJohannes Berg case REG_REQ_OK: 14812f92212bSJohannes Berg break; 14822f92212bSJohannes Berg default: 1483fb1fc7adSLuis R. Rodriguez /* 1484fb1fc7adSLuis R. Rodriguez * If the regulatory domain being requested by the 14853e0c3ff3SLuis R. Rodriguez * driver has already been set just copy it to the 1486fb1fc7adSLuis R. Rodriguez * wiphy 1487fb1fc7adSLuis R. Rodriguez */ 14882f92212bSJohannes Berg if (treatment == REG_REQ_ALREADY_SET && 14892f92212bSJohannes Berg pending_request->initiator == NL80211_REGDOM_SET_BY_DRIVER) { 1490458f4f9eSJohannes Berg regd = reg_copy_regd(get_cfg80211_regdom()); 1491e9763c3cSJohannes Berg if (IS_ERR(regd)) { 1492d951c1ddSLuis R. Rodriguez kfree(pending_request); 14932f92212bSJohannes Berg return REG_REQ_IGNORE; 1494d951c1ddSLuis R. Rodriguez } 14952f92212bSJohannes Berg treatment = REG_REQ_ALREADY_SET; 1496458f4f9eSJohannes Berg rcu_assign_pointer(wiphy->regd, regd); 14973e0c3ff3SLuis R. Rodriguez goto new_request; 14983e0c3ff3SLuis R. Rodriguez } 1499d951c1ddSLuis R. Rodriguez kfree(pending_request); 15002f92212bSJohannes Berg return treatment; 15013e0c3ff3SLuis R. Rodriguez } 1502b2e1b302SLuis R. Rodriguez 15033e0c3ff3SLuis R. Rodriguez new_request: 1504c492db37SJohannes Berg lr = get_last_request(); 1505c492db37SJohannes Berg if (lr != &core_request_world && lr) 1506c492db37SJohannes Berg kfree_rcu(lr, rcu_head); 1507d951c1ddSLuis R. Rodriguez 1508c492db37SJohannes Berg pending_request->intersect = intersect; 1509c492db37SJohannes Berg pending_request->processed = false; 1510c492db37SJohannes Berg rcu_assign_pointer(last_request, pending_request); 1511c492db37SJohannes Berg lr = pending_request; 1512d951c1ddSLuis R. Rodriguez 1513d951c1ddSLuis R. Rodriguez pending_request = NULL; 15143e0c3ff3SLuis R. Rodriguez 1515c492db37SJohannes Berg if (lr->initiator == NL80211_REGDOM_SET_BY_USER) { 1516c492db37SJohannes Berg user_alpha2[0] = lr->alpha2[0]; 1517c492db37SJohannes Berg user_alpha2[1] = lr->alpha2[1]; 151809d989d1SLuis R. Rodriguez } 151909d989d1SLuis R. Rodriguez 15202f92212bSJohannes Berg /* When r == REG_REQ_INTERSECT we do need to call CRDA */ 15212f92212bSJohannes Berg if (treatment != REG_REQ_OK && treatment != REG_REQ_INTERSECT) { 152273d54c9eSLuis R. Rodriguez /* 152373d54c9eSLuis R. Rodriguez * Since CRDA will not be called in this case as we already 152473d54c9eSLuis R. Rodriguez * have applied the requested regulatory domain before we just 152573d54c9eSLuis R. Rodriguez * inform userspace we have processed the request 152673d54c9eSLuis R. Rodriguez */ 15272f92212bSJohannes Berg if (treatment == REG_REQ_ALREADY_SET) { 1528c492db37SJohannes Berg nl80211_send_reg_change_event(lr); 1529b2e253cfSLuis R. Rodriguez reg_set_request_processed(); 1530b2e253cfSLuis R. Rodriguez } 15312f92212bSJohannes Berg return treatment; 153273d54c9eSLuis R. Rodriguez } 15333e0c3ff3SLuis R. Rodriguez 1534c492db37SJohannes Berg if (call_crda(lr->alpha2)) 15352f92212bSJohannes Berg return REG_REQ_IGNORE; 15362f92212bSJohannes Berg return REG_REQ_OK; 1537b2e1b302SLuis R. Rodriguez } 1538b2e1b302SLuis R. Rodriguez 153930a548c7SLuis R. Rodriguez /* This processes *all* regulatory hints */ 15401daa37c7SLuis R. Rodriguez static void reg_process_hint(struct regulatory_request *reg_request) 1541fe33eb39SLuis R. Rodriguez { 1542fe33eb39SLuis R. Rodriguez struct wiphy *wiphy = NULL; 1543fe33eb39SLuis R. Rodriguez 1544fdc9d7b2SJohannes Berg if (WARN_ON(!reg_request->alpha2)) 1545fdc9d7b2SJohannes Berg return; 1546fe33eb39SLuis R. Rodriguez 1547f4173766SJohannes Berg if (reg_request->wiphy_idx != WIPHY_IDX_INVALID) 1548fe33eb39SLuis R. Rodriguez wiphy = wiphy_idx_to_wiphy(reg_request->wiphy_idx); 1549fe33eb39SLuis R. Rodriguez 15501daa37c7SLuis R. Rodriguez if (reg_request->initiator == NL80211_REGDOM_SET_BY_DRIVER && !wiphy) { 1551d951c1ddSLuis R. Rodriguez kfree(reg_request); 1552b0e2880bSLuis R. Rodriguez return; 1553fe33eb39SLuis R. Rodriguez } 1554fe33eb39SLuis R. Rodriguez 15552f92212bSJohannes Berg switch (__regulatory_hint(wiphy, reg_request)) { 15562f92212bSJohannes Berg case REG_REQ_ALREADY_SET: 1557fe33eb39SLuis R. Rodriguez /* This is required so that the orig_* parameters are saved */ 15582f92212bSJohannes Berg if (wiphy && wiphy->flags & WIPHY_FLAG_STRICT_REGULATORY) 15591daa37c7SLuis R. Rodriguez wiphy_update_regulatory(wiphy, reg_request->initiator); 15602f92212bSJohannes Berg break; 15612f92212bSJohannes Berg default: 15621daa37c7SLuis R. Rodriguez if (reg_request->initiator == NL80211_REGDOM_SET_BY_USER) 15632f92212bSJohannes Berg schedule_delayed_work(®_timeout, 15642f92212bSJohannes Berg msecs_to_jiffies(3142)); 15652f92212bSJohannes Berg break; 1566a90c7a31SLuis R. Rodriguez } 1567fe33eb39SLuis R. Rodriguez } 1568fe33eb39SLuis R. Rodriguez 1569b2e253cfSLuis R. Rodriguez /* 1570b2e253cfSLuis R. Rodriguez * Processes regulatory hints, this is all the NL80211_REGDOM_SET_BY_* 1571b2e253cfSLuis R. Rodriguez * Regulatory hints come on a first come first serve basis and we 1572b2e253cfSLuis R. Rodriguez * must process each one atomically. 1573b2e253cfSLuis R. Rodriguez */ 1574fe33eb39SLuis R. Rodriguez static void reg_process_pending_hints(void) 1575fe33eb39SLuis R. Rodriguez { 1576c492db37SJohannes Berg struct regulatory_request *reg_request, *lr; 1577fe33eb39SLuis R. Rodriguez 1578c492db37SJohannes Berg lr = get_last_request(); 1579b0e2880bSLuis R. Rodriguez 1580b2e253cfSLuis R. Rodriguez /* When last_request->processed becomes true this will be rescheduled */ 1581c492db37SJohannes Berg if (lr && !lr->processed) { 15821a919318SJohannes Berg REG_DBG_PRINT("Pending regulatory request, waiting for it to be processed...\n"); 15835fe231e8SJohannes Berg return; 1584b2e253cfSLuis R. Rodriguez } 1585b2e253cfSLuis R. Rodriguez 1586fe33eb39SLuis R. Rodriguez spin_lock(®_requests_lock); 1587b2e253cfSLuis R. Rodriguez 1588b2e253cfSLuis R. Rodriguez if (list_empty(®_requests_list)) { 1589b2e253cfSLuis R. Rodriguez spin_unlock(®_requests_lock); 15905fe231e8SJohannes Berg return; 1591b2e253cfSLuis R. Rodriguez } 1592b2e253cfSLuis R. Rodriguez 1593fe33eb39SLuis R. Rodriguez reg_request = list_first_entry(®_requests_list, 1594fe33eb39SLuis R. Rodriguez struct regulatory_request, 1595fe33eb39SLuis R. Rodriguez list); 1596fe33eb39SLuis R. Rodriguez list_del_init(®_request->list); 1597fe33eb39SLuis R. Rodriguez 1598d951c1ddSLuis R. Rodriguez spin_unlock(®_requests_lock); 1599b0e2880bSLuis R. Rodriguez 16001daa37c7SLuis R. Rodriguez reg_process_hint(reg_request); 1601fe33eb39SLuis R. Rodriguez } 1602fe33eb39SLuis R. Rodriguez 1603e38f8a7aSLuis R. Rodriguez /* Processes beacon hints -- this has nothing to do with country IEs */ 1604e38f8a7aSLuis R. Rodriguez static void reg_process_pending_beacon_hints(void) 1605e38f8a7aSLuis R. Rodriguez { 160679c97e97SJohannes Berg struct cfg80211_registered_device *rdev; 1607e38f8a7aSLuis R. Rodriguez struct reg_beacon *pending_beacon, *tmp; 1608e38f8a7aSLuis R. Rodriguez 1609e38f8a7aSLuis R. Rodriguez /* This goes through the _pending_ beacon list */ 1610e38f8a7aSLuis R. Rodriguez spin_lock_bh(®_pending_beacons_lock); 1611e38f8a7aSLuis R. Rodriguez 1612e38f8a7aSLuis R. Rodriguez list_for_each_entry_safe(pending_beacon, tmp, 1613e38f8a7aSLuis R. Rodriguez ®_pending_beacons, list) { 1614e38f8a7aSLuis R. Rodriguez list_del_init(&pending_beacon->list); 1615e38f8a7aSLuis R. Rodriguez 1616e38f8a7aSLuis R. Rodriguez /* Applies the beacon hint to current wiphys */ 161779c97e97SJohannes Berg list_for_each_entry(rdev, &cfg80211_rdev_list, list) 161879c97e97SJohannes Berg wiphy_update_new_beacon(&rdev->wiphy, pending_beacon); 1619e38f8a7aSLuis R. Rodriguez 1620e38f8a7aSLuis R. Rodriguez /* Remembers the beacon hint for new wiphys or reg changes */ 1621e38f8a7aSLuis R. Rodriguez list_add_tail(&pending_beacon->list, ®_beacon_list); 1622e38f8a7aSLuis R. Rodriguez } 1623e38f8a7aSLuis R. Rodriguez 1624e38f8a7aSLuis R. Rodriguez spin_unlock_bh(®_pending_beacons_lock); 1625e38f8a7aSLuis R. Rodriguez } 1626e38f8a7aSLuis R. Rodriguez 1627fe33eb39SLuis R. Rodriguez static void reg_todo(struct work_struct *work) 1628fe33eb39SLuis R. Rodriguez { 16295fe231e8SJohannes Berg rtnl_lock(); 1630fe33eb39SLuis R. Rodriguez reg_process_pending_hints(); 1631e38f8a7aSLuis R. Rodriguez reg_process_pending_beacon_hints(); 16325fe231e8SJohannes Berg rtnl_unlock(); 1633fe33eb39SLuis R. Rodriguez } 1634fe33eb39SLuis R. Rodriguez 1635fe33eb39SLuis R. Rodriguez static void queue_regulatory_request(struct regulatory_request *request) 1636fe33eb39SLuis R. Rodriguez { 1637c61029c7SJohn W. Linville request->alpha2[0] = toupper(request->alpha2[0]); 1638c61029c7SJohn W. Linville request->alpha2[1] = toupper(request->alpha2[1]); 1639c61029c7SJohn W. Linville 1640fe33eb39SLuis R. Rodriguez spin_lock(®_requests_lock); 1641fe33eb39SLuis R. Rodriguez list_add_tail(&request->list, ®_requests_list); 1642fe33eb39SLuis R. Rodriguez spin_unlock(®_requests_lock); 1643fe33eb39SLuis R. Rodriguez 1644fe33eb39SLuis R. Rodriguez schedule_work(®_work); 1645fe33eb39SLuis R. Rodriguez } 1646fe33eb39SLuis R. Rodriguez 164709d989d1SLuis R. Rodriguez /* 164809d989d1SLuis R. Rodriguez * Core regulatory hint -- happens during cfg80211_init() 164909d989d1SLuis R. Rodriguez * and when we restore regulatory settings. 165009d989d1SLuis R. Rodriguez */ 1651ba25c141SLuis R. Rodriguez static int regulatory_hint_core(const char *alpha2) 1652ba25c141SLuis R. Rodriguez { 1653ba25c141SLuis R. Rodriguez struct regulatory_request *request; 1654ba25c141SLuis R. Rodriguez 16551a919318SJohannes Berg request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); 1656ba25c141SLuis R. Rodriguez if (!request) 1657ba25c141SLuis R. Rodriguez return -ENOMEM; 1658ba25c141SLuis R. Rodriguez 1659ba25c141SLuis R. Rodriguez request->alpha2[0] = alpha2[0]; 1660ba25c141SLuis R. Rodriguez request->alpha2[1] = alpha2[1]; 16617db90f4aSLuis R. Rodriguez request->initiator = NL80211_REGDOM_SET_BY_CORE; 1662ba25c141SLuis R. Rodriguez 166331e99729SLuis R. Rodriguez queue_regulatory_request(request); 16645078b2e3SLuis R. Rodriguez 1665fe33eb39SLuis R. Rodriguez return 0; 1666ba25c141SLuis R. Rodriguez } 1667ba25c141SLuis R. Rodriguez 1668fe33eb39SLuis R. Rodriguez /* User hints */ 166957b5ce07SLuis R. Rodriguez int regulatory_hint_user(const char *alpha2, 167057b5ce07SLuis R. Rodriguez enum nl80211_user_reg_hint_type user_reg_hint_type) 1671b2e1b302SLuis R. Rodriguez { 1672fe33eb39SLuis R. Rodriguez struct regulatory_request *request; 1673fe33eb39SLuis R. Rodriguez 1674fdc9d7b2SJohannes Berg if (WARN_ON(!alpha2)) 1675fdc9d7b2SJohannes Berg return -EINVAL; 1676b2e1b302SLuis R. Rodriguez 1677fe33eb39SLuis R. Rodriguez request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); 1678fe33eb39SLuis R. Rodriguez if (!request) 1679fe33eb39SLuis R. Rodriguez return -ENOMEM; 1680fe33eb39SLuis R. Rodriguez 1681f4173766SJohannes Berg request->wiphy_idx = WIPHY_IDX_INVALID; 1682fe33eb39SLuis R. Rodriguez request->alpha2[0] = alpha2[0]; 1683fe33eb39SLuis R. Rodriguez request->alpha2[1] = alpha2[1]; 1684e12822e1SLuis R. Rodriguez request->initiator = NL80211_REGDOM_SET_BY_USER; 168557b5ce07SLuis R. Rodriguez request->user_reg_hint_type = user_reg_hint_type; 1686fe33eb39SLuis R. Rodriguez 1687fe33eb39SLuis R. Rodriguez queue_regulatory_request(request); 1688fe33eb39SLuis R. Rodriguez 1689fe33eb39SLuis R. Rodriguez return 0; 1690fe33eb39SLuis R. Rodriguez } 1691fe33eb39SLuis R. Rodriguez 1692fe33eb39SLuis R. Rodriguez /* Driver hints */ 1693fe33eb39SLuis R. Rodriguez int regulatory_hint(struct wiphy *wiphy, const char *alpha2) 1694fe33eb39SLuis R. Rodriguez { 1695fe33eb39SLuis R. Rodriguez struct regulatory_request *request; 1696fe33eb39SLuis R. Rodriguez 1697fdc9d7b2SJohannes Berg if (WARN_ON(!alpha2 || !wiphy)) 1698fdc9d7b2SJohannes Berg return -EINVAL; 1699fe33eb39SLuis R. Rodriguez 1700fe33eb39SLuis R. Rodriguez request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); 1701fe33eb39SLuis R. Rodriguez if (!request) 1702fe33eb39SLuis R. Rodriguez return -ENOMEM; 1703fe33eb39SLuis R. Rodriguez 1704fe33eb39SLuis R. Rodriguez request->wiphy_idx = get_wiphy_idx(wiphy); 1705fe33eb39SLuis R. Rodriguez 1706fe33eb39SLuis R. Rodriguez request->alpha2[0] = alpha2[0]; 1707fe33eb39SLuis R. Rodriguez request->alpha2[1] = alpha2[1]; 17087db90f4aSLuis R. Rodriguez request->initiator = NL80211_REGDOM_SET_BY_DRIVER; 1709fe33eb39SLuis R. Rodriguez 1710fe33eb39SLuis R. Rodriguez queue_regulatory_request(request); 1711fe33eb39SLuis R. Rodriguez 1712fe33eb39SLuis R. Rodriguez return 0; 1713b2e1b302SLuis R. Rodriguez } 1714b2e1b302SLuis R. Rodriguez EXPORT_SYMBOL(regulatory_hint); 1715b2e1b302SLuis R. Rodriguez 1716789fd033SLuis R. Rodriguez void regulatory_hint_country_ie(struct wiphy *wiphy, enum ieee80211_band band, 17171a919318SJohannes Berg const u8 *country_ie, u8 country_ie_len) 17183f2355cbSLuis R. Rodriguez { 17193f2355cbSLuis R. Rodriguez char alpha2[2]; 17203f2355cbSLuis R. Rodriguez enum environment_cap env = ENVIRON_ANY; 1721db2424c5SJohannes Berg struct regulatory_request *request = NULL, *lr; 1722d335fe63SLuis R. Rodriguez 17233f2355cbSLuis R. Rodriguez /* IE len must be evenly divisible by 2 */ 17243f2355cbSLuis R. Rodriguez if (country_ie_len & 0x01) 1725db2424c5SJohannes Berg return; 17263f2355cbSLuis R. Rodriguez 17273f2355cbSLuis R. Rodriguez if (country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN) 1728db2424c5SJohannes Berg return; 1729db2424c5SJohannes Berg 1730db2424c5SJohannes Berg request = kzalloc(sizeof(*request), GFP_KERNEL); 1731db2424c5SJohannes Berg if (!request) 1732db2424c5SJohannes Berg return; 17333f2355cbSLuis R. Rodriguez 17343f2355cbSLuis R. Rodriguez alpha2[0] = country_ie[0]; 17353f2355cbSLuis R. Rodriguez alpha2[1] = country_ie[1]; 17363f2355cbSLuis R. Rodriguez 17373f2355cbSLuis R. Rodriguez if (country_ie[2] == 'I') 17383f2355cbSLuis R. Rodriguez env = ENVIRON_INDOOR; 17393f2355cbSLuis R. Rodriguez else if (country_ie[2] == 'O') 17403f2355cbSLuis R. Rodriguez env = ENVIRON_OUTDOOR; 17413f2355cbSLuis R. Rodriguez 1742db2424c5SJohannes Berg rcu_read_lock(); 1743db2424c5SJohannes Berg lr = get_last_request(); 1744db2424c5SJohannes Berg 1745db2424c5SJohannes Berg if (unlikely(!lr)) 1746db2424c5SJohannes Berg goto out; 1747db2424c5SJohannes Berg 1748fb1fc7adSLuis R. Rodriguez /* 17498b19e6caSLuis R. Rodriguez * We will run this only upon a successful connection on cfg80211. 17504b44c8bcSLuis R. Rodriguez * We leave conflict resolution to the workqueue, where can hold 17515fe231e8SJohannes Berg * the RTNL. 1752fb1fc7adSLuis R. Rodriguez */ 1753c492db37SJohannes Berg if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE && 1754c492db37SJohannes Berg lr->wiphy_idx != WIPHY_IDX_INVALID) 17553f2355cbSLuis R. Rodriguez goto out; 17563f2355cbSLuis R. Rodriguez 1757fe33eb39SLuis R. Rodriguez request->wiphy_idx = get_wiphy_idx(wiphy); 17584f366c5dSJohn W. Linville request->alpha2[0] = alpha2[0]; 17594f366c5dSJohn W. Linville request->alpha2[1] = alpha2[1]; 17607db90f4aSLuis R. Rodriguez request->initiator = NL80211_REGDOM_SET_BY_COUNTRY_IE; 1761fe33eb39SLuis R. Rodriguez request->country_ie_env = env; 17623f2355cbSLuis R. Rodriguez 1763fe33eb39SLuis R. Rodriguez queue_regulatory_request(request); 1764db2424c5SJohannes Berg request = NULL; 17653f2355cbSLuis R. Rodriguez out: 1766db2424c5SJohannes Berg kfree(request); 1767db2424c5SJohannes Berg rcu_read_unlock(); 17683f2355cbSLuis R. Rodriguez } 1769b2e1b302SLuis R. Rodriguez 177009d989d1SLuis R. Rodriguez static void restore_alpha2(char *alpha2, bool reset_user) 177109d989d1SLuis R. Rodriguez { 177209d989d1SLuis R. Rodriguez /* indicates there is no alpha2 to consider for restoration */ 177309d989d1SLuis R. Rodriguez alpha2[0] = '9'; 177409d989d1SLuis R. Rodriguez alpha2[1] = '7'; 177509d989d1SLuis R. Rodriguez 177609d989d1SLuis R. Rodriguez /* The user setting has precedence over the module parameter */ 177709d989d1SLuis R. Rodriguez if (is_user_regdom_saved()) { 177809d989d1SLuis R. Rodriguez /* Unless we're asked to ignore it and reset it */ 177909d989d1SLuis R. Rodriguez if (reset_user) { 17801a919318SJohannes Berg REG_DBG_PRINT("Restoring regulatory settings including user preference\n"); 178109d989d1SLuis R. Rodriguez user_alpha2[0] = '9'; 178209d989d1SLuis R. Rodriguez user_alpha2[1] = '7'; 178309d989d1SLuis R. Rodriguez 178409d989d1SLuis R. Rodriguez /* 178509d989d1SLuis R. Rodriguez * If we're ignoring user settings, we still need to 178609d989d1SLuis R. Rodriguez * check the module parameter to ensure we put things 178709d989d1SLuis R. Rodriguez * back as they were for a full restore. 178809d989d1SLuis R. Rodriguez */ 178909d989d1SLuis R. Rodriguez if (!is_world_regdom(ieee80211_regdom)) { 17901a919318SJohannes Berg REG_DBG_PRINT("Keeping preference on module parameter ieee80211_regdom: %c%c\n", 17911a919318SJohannes Berg ieee80211_regdom[0], ieee80211_regdom[1]); 179209d989d1SLuis R. Rodriguez alpha2[0] = ieee80211_regdom[0]; 179309d989d1SLuis R. Rodriguez alpha2[1] = ieee80211_regdom[1]; 179409d989d1SLuis R. Rodriguez } 179509d989d1SLuis R. Rodriguez } else { 17961a919318SJohannes Berg REG_DBG_PRINT("Restoring regulatory settings while preserving user preference for: %c%c\n", 17971a919318SJohannes Berg user_alpha2[0], user_alpha2[1]); 179809d989d1SLuis R. Rodriguez alpha2[0] = user_alpha2[0]; 179909d989d1SLuis R. Rodriguez alpha2[1] = user_alpha2[1]; 180009d989d1SLuis R. Rodriguez } 180109d989d1SLuis R. Rodriguez } else if (!is_world_regdom(ieee80211_regdom)) { 18021a919318SJohannes Berg REG_DBG_PRINT("Keeping preference on module parameter ieee80211_regdom: %c%c\n", 18031a919318SJohannes Berg ieee80211_regdom[0], ieee80211_regdom[1]); 180409d989d1SLuis R. Rodriguez alpha2[0] = ieee80211_regdom[0]; 180509d989d1SLuis R. Rodriguez alpha2[1] = ieee80211_regdom[1]; 180609d989d1SLuis R. Rodriguez } else 1807d91e41b6SLuis R. Rodriguez REG_DBG_PRINT("Restoring regulatory settings\n"); 180809d989d1SLuis R. Rodriguez } 180909d989d1SLuis R. Rodriguez 18105ce543d1SRajkumar Manoharan static void restore_custom_reg_settings(struct wiphy *wiphy) 18115ce543d1SRajkumar Manoharan { 18125ce543d1SRajkumar Manoharan struct ieee80211_supported_band *sband; 18135ce543d1SRajkumar Manoharan enum ieee80211_band band; 18145ce543d1SRajkumar Manoharan struct ieee80211_channel *chan; 18155ce543d1SRajkumar Manoharan int i; 18165ce543d1SRajkumar Manoharan 18175ce543d1SRajkumar Manoharan for (band = 0; band < IEEE80211_NUM_BANDS; band++) { 18185ce543d1SRajkumar Manoharan sband = wiphy->bands[band]; 18195ce543d1SRajkumar Manoharan if (!sband) 18205ce543d1SRajkumar Manoharan continue; 18215ce543d1SRajkumar Manoharan for (i = 0; i < sband->n_channels; i++) { 18225ce543d1SRajkumar Manoharan chan = &sband->channels[i]; 18235ce543d1SRajkumar Manoharan chan->flags = chan->orig_flags; 18245ce543d1SRajkumar Manoharan chan->max_antenna_gain = chan->orig_mag; 18255ce543d1SRajkumar Manoharan chan->max_power = chan->orig_mpwr; 1826899852afSPaul Stewart chan->beacon_found = false; 18275ce543d1SRajkumar Manoharan } 18285ce543d1SRajkumar Manoharan } 18295ce543d1SRajkumar Manoharan } 18305ce543d1SRajkumar Manoharan 183109d989d1SLuis R. Rodriguez /* 183209d989d1SLuis R. Rodriguez * Restoring regulatory settings involves ingoring any 183309d989d1SLuis R. Rodriguez * possibly stale country IE information and user regulatory 183409d989d1SLuis R. Rodriguez * settings if so desired, this includes any beacon hints 183509d989d1SLuis R. Rodriguez * learned as we could have traveled outside to another country 183609d989d1SLuis R. Rodriguez * after disconnection. To restore regulatory settings we do 183709d989d1SLuis R. Rodriguez * exactly what we did at bootup: 183809d989d1SLuis R. Rodriguez * 183909d989d1SLuis R. Rodriguez * - send a core regulatory hint 184009d989d1SLuis R. Rodriguez * - send a user regulatory hint if applicable 184109d989d1SLuis R. Rodriguez * 184209d989d1SLuis R. Rodriguez * Device drivers that send a regulatory hint for a specific country 184309d989d1SLuis R. Rodriguez * keep their own regulatory domain on wiphy->regd so that does does 184409d989d1SLuis R. Rodriguez * not need to be remembered. 184509d989d1SLuis R. Rodriguez */ 184609d989d1SLuis R. Rodriguez static void restore_regulatory_settings(bool reset_user) 184709d989d1SLuis R. Rodriguez { 184809d989d1SLuis R. Rodriguez char alpha2[2]; 1849cee0bec5SDmitry Shmidt char world_alpha2[2]; 185009d989d1SLuis R. Rodriguez struct reg_beacon *reg_beacon, *btmp; 185114609555SLuis R. Rodriguez struct regulatory_request *reg_request, *tmp; 185214609555SLuis R. Rodriguez LIST_HEAD(tmp_reg_req_list); 18535ce543d1SRajkumar Manoharan struct cfg80211_registered_device *rdev; 185409d989d1SLuis R. Rodriguez 18555fe231e8SJohannes Berg ASSERT_RTNL(); 18565fe231e8SJohannes Berg 18572d319867SJohannes Berg reset_regdomains(true, &world_regdom); 185809d989d1SLuis R. Rodriguez restore_alpha2(alpha2, reset_user); 185909d989d1SLuis R. Rodriguez 186014609555SLuis R. Rodriguez /* 186114609555SLuis R. Rodriguez * If there's any pending requests we simply 186214609555SLuis R. Rodriguez * stash them to a temporary pending queue and 186314609555SLuis R. Rodriguez * add then after we've restored regulatory 186414609555SLuis R. Rodriguez * settings. 186514609555SLuis R. Rodriguez */ 186614609555SLuis R. Rodriguez spin_lock(®_requests_lock); 1867fea9bcedSJohannes Berg list_for_each_entry_safe(reg_request, tmp, ®_requests_list, list) { 1868fea9bcedSJohannes Berg if (reg_request->initiator != NL80211_REGDOM_SET_BY_USER) 186914609555SLuis R. Rodriguez continue; 187000a9ac4cSWei Yongjun list_move_tail(®_request->list, &tmp_reg_req_list); 187114609555SLuis R. Rodriguez } 187214609555SLuis R. Rodriguez spin_unlock(®_requests_lock); 187314609555SLuis R. Rodriguez 187409d989d1SLuis R. Rodriguez /* Clear beacon hints */ 187509d989d1SLuis R. Rodriguez spin_lock_bh(®_pending_beacons_lock); 1876fea9bcedSJohannes Berg list_for_each_entry_safe(reg_beacon, btmp, ®_pending_beacons, list) { 187709d989d1SLuis R. Rodriguez list_del(®_beacon->list); 187809d989d1SLuis R. Rodriguez kfree(reg_beacon); 187909d989d1SLuis R. Rodriguez } 188009d989d1SLuis R. Rodriguez spin_unlock_bh(®_pending_beacons_lock); 188109d989d1SLuis R. Rodriguez 1882fea9bcedSJohannes Berg list_for_each_entry_safe(reg_beacon, btmp, ®_beacon_list, list) { 188309d989d1SLuis R. Rodriguez list_del(®_beacon->list); 188409d989d1SLuis R. Rodriguez kfree(reg_beacon); 188509d989d1SLuis R. Rodriguez } 188609d989d1SLuis R. Rodriguez 188709d989d1SLuis R. Rodriguez /* First restore to the basic regulatory settings */ 1888379b82f4SJohannes Berg world_alpha2[0] = cfg80211_world_regdom->alpha2[0]; 1889379b82f4SJohannes Berg world_alpha2[1] = cfg80211_world_regdom->alpha2[1]; 189009d989d1SLuis R. Rodriguez 18915ce543d1SRajkumar Manoharan list_for_each_entry(rdev, &cfg80211_rdev_list, list) { 18925ce543d1SRajkumar Manoharan if (rdev->wiphy.flags & WIPHY_FLAG_CUSTOM_REGULATORY) 18935ce543d1SRajkumar Manoharan restore_custom_reg_settings(&rdev->wiphy); 18945ce543d1SRajkumar Manoharan } 18955ce543d1SRajkumar Manoharan 1896cee0bec5SDmitry Shmidt regulatory_hint_core(world_alpha2); 189709d989d1SLuis R. Rodriguez 189809d989d1SLuis R. Rodriguez /* 189909d989d1SLuis R. Rodriguez * This restores the ieee80211_regdom module parameter 190009d989d1SLuis R. Rodriguez * preference or the last user requested regulatory 190109d989d1SLuis R. Rodriguez * settings, user regulatory settings takes precedence. 190209d989d1SLuis R. Rodriguez */ 190309d989d1SLuis R. Rodriguez if (is_an_alpha2(alpha2)) 190457b5ce07SLuis R. Rodriguez regulatory_hint_user(user_alpha2, NL80211_USER_REG_HINT_USER); 190509d989d1SLuis R. Rodriguez 190614609555SLuis R. Rodriguez spin_lock(®_requests_lock); 190711cff96cSJohannes Berg list_splice_tail_init(&tmp_reg_req_list, ®_requests_list); 190814609555SLuis R. Rodriguez spin_unlock(®_requests_lock); 190914609555SLuis R. Rodriguez 191014609555SLuis R. Rodriguez REG_DBG_PRINT("Kicking the queue\n"); 191114609555SLuis R. Rodriguez 191214609555SLuis R. Rodriguez schedule_work(®_work); 191314609555SLuis R. Rodriguez } 191409d989d1SLuis R. Rodriguez 191509d989d1SLuis R. Rodriguez void regulatory_hint_disconnect(void) 191609d989d1SLuis R. Rodriguez { 19171a919318SJohannes Berg REG_DBG_PRINT("All devices are disconnected, going to restore regulatory settings\n"); 191809d989d1SLuis R. Rodriguez restore_regulatory_settings(false); 191909d989d1SLuis R. Rodriguez } 192009d989d1SLuis R. Rodriguez 1921e38f8a7aSLuis R. Rodriguez static bool freq_is_chan_12_13_14(u16 freq) 1922e38f8a7aSLuis R. Rodriguez { 192359eb21a6SBruno Randolf if (freq == ieee80211_channel_to_frequency(12, IEEE80211_BAND_2GHZ) || 192459eb21a6SBruno Randolf freq == ieee80211_channel_to_frequency(13, IEEE80211_BAND_2GHZ) || 192559eb21a6SBruno Randolf freq == ieee80211_channel_to_frequency(14, IEEE80211_BAND_2GHZ)) 1926e38f8a7aSLuis R. Rodriguez return true; 1927e38f8a7aSLuis R. Rodriguez return false; 1928e38f8a7aSLuis R. Rodriguez } 1929e38f8a7aSLuis R. Rodriguez 19303ebfa6e7SLuis R. Rodriguez static bool pending_reg_beacon(struct ieee80211_channel *beacon_chan) 19313ebfa6e7SLuis R. Rodriguez { 19323ebfa6e7SLuis R. Rodriguez struct reg_beacon *pending_beacon; 19333ebfa6e7SLuis R. Rodriguez 19343ebfa6e7SLuis R. Rodriguez list_for_each_entry(pending_beacon, ®_pending_beacons, list) 19353ebfa6e7SLuis R. Rodriguez if (beacon_chan->center_freq == 19363ebfa6e7SLuis R. Rodriguez pending_beacon->chan.center_freq) 19373ebfa6e7SLuis R. Rodriguez return true; 19383ebfa6e7SLuis R. Rodriguez return false; 19393ebfa6e7SLuis R. Rodriguez } 19403ebfa6e7SLuis R. Rodriguez 1941e38f8a7aSLuis R. Rodriguez int regulatory_hint_found_beacon(struct wiphy *wiphy, 1942e38f8a7aSLuis R. Rodriguez struct ieee80211_channel *beacon_chan, 1943e38f8a7aSLuis R. Rodriguez gfp_t gfp) 1944e38f8a7aSLuis R. Rodriguez { 1945e38f8a7aSLuis R. Rodriguez struct reg_beacon *reg_beacon; 19463ebfa6e7SLuis R. Rodriguez bool processing; 1947e38f8a7aSLuis R. Rodriguez 19481a919318SJohannes Berg if (beacon_chan->beacon_found || 19491a919318SJohannes Berg beacon_chan->flags & IEEE80211_CHAN_RADAR || 1950e38f8a7aSLuis R. Rodriguez (beacon_chan->band == IEEE80211_BAND_2GHZ && 19511a919318SJohannes Berg !freq_is_chan_12_13_14(beacon_chan->center_freq))) 1952e38f8a7aSLuis R. Rodriguez return 0; 1953e38f8a7aSLuis R. Rodriguez 19543ebfa6e7SLuis R. Rodriguez spin_lock_bh(®_pending_beacons_lock); 19553ebfa6e7SLuis R. Rodriguez processing = pending_reg_beacon(beacon_chan); 19563ebfa6e7SLuis R. Rodriguez spin_unlock_bh(®_pending_beacons_lock); 19573ebfa6e7SLuis R. Rodriguez 19583ebfa6e7SLuis R. Rodriguez if (processing) 1959e38f8a7aSLuis R. Rodriguez return 0; 1960e38f8a7aSLuis R. Rodriguez 1961e38f8a7aSLuis R. Rodriguez reg_beacon = kzalloc(sizeof(struct reg_beacon), gfp); 1962e38f8a7aSLuis R. Rodriguez if (!reg_beacon) 1963e38f8a7aSLuis R. Rodriguez return -ENOMEM; 1964e38f8a7aSLuis R. Rodriguez 19651a919318SJohannes Berg REG_DBG_PRINT("Found new beacon on frequency: %d MHz (Ch %d) on %s\n", 1966e38f8a7aSLuis R. Rodriguez beacon_chan->center_freq, 1967e38f8a7aSLuis R. Rodriguez ieee80211_frequency_to_channel(beacon_chan->center_freq), 1968e38f8a7aSLuis R. Rodriguez wiphy_name(wiphy)); 19694113f751SLuis R. Rodriguez 1970e38f8a7aSLuis R. Rodriguez memcpy(®_beacon->chan, beacon_chan, 1971e38f8a7aSLuis R. Rodriguez sizeof(struct ieee80211_channel)); 1972e38f8a7aSLuis R. Rodriguez 1973e38f8a7aSLuis R. Rodriguez /* 1974e38f8a7aSLuis R. Rodriguez * Since we can be called from BH or and non-BH context 1975e38f8a7aSLuis R. Rodriguez * we must use spin_lock_bh() 1976e38f8a7aSLuis R. Rodriguez */ 1977e38f8a7aSLuis R. Rodriguez spin_lock_bh(®_pending_beacons_lock); 1978e38f8a7aSLuis R. Rodriguez list_add_tail(®_beacon->list, ®_pending_beacons); 1979e38f8a7aSLuis R. Rodriguez spin_unlock_bh(®_pending_beacons_lock); 1980e38f8a7aSLuis R. Rodriguez 1981e38f8a7aSLuis R. Rodriguez schedule_work(®_work); 1982e38f8a7aSLuis R. Rodriguez 1983e38f8a7aSLuis R. Rodriguez return 0; 1984e38f8a7aSLuis R. Rodriguez } 1985e38f8a7aSLuis R. Rodriguez 1986a3d2eaf0SJohannes Berg static void print_rd_rules(const struct ieee80211_regdomain *rd) 1987b2e1b302SLuis R. Rodriguez { 1988b2e1b302SLuis R. Rodriguez unsigned int i; 1989a3d2eaf0SJohannes Berg const struct ieee80211_reg_rule *reg_rule = NULL; 1990a3d2eaf0SJohannes Berg const struct ieee80211_freq_range *freq_range = NULL; 1991a3d2eaf0SJohannes Berg const struct ieee80211_power_rule *power_rule = NULL; 1992b2e1b302SLuis R. Rodriguez 1993e9c0268fSJoe Perches pr_info(" (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)\n"); 1994b2e1b302SLuis R. Rodriguez 1995b2e1b302SLuis R. Rodriguez for (i = 0; i < rd->n_reg_rules; i++) { 1996b2e1b302SLuis R. Rodriguez reg_rule = &rd->reg_rules[i]; 1997b2e1b302SLuis R. Rodriguez freq_range = ®_rule->freq_range; 1998b2e1b302SLuis R. Rodriguez power_rule = ®_rule->power_rule; 1999b2e1b302SLuis R. Rodriguez 2000fb1fc7adSLuis R. Rodriguez /* 2001fb1fc7adSLuis R. Rodriguez * There may not be documentation for max antenna gain 2002fb1fc7adSLuis R. Rodriguez * in certain regions 2003fb1fc7adSLuis R. Rodriguez */ 2004b2e1b302SLuis R. Rodriguez if (power_rule->max_antenna_gain) 2005e9c0268fSJoe Perches pr_info(" (%d KHz - %d KHz @ %d KHz), (%d mBi, %d mBm)\n", 2006b2e1b302SLuis R. Rodriguez freq_range->start_freq_khz, 2007b2e1b302SLuis R. Rodriguez freq_range->end_freq_khz, 2008b2e1b302SLuis R. Rodriguez freq_range->max_bandwidth_khz, 2009b2e1b302SLuis R. Rodriguez power_rule->max_antenna_gain, 2010b2e1b302SLuis R. Rodriguez power_rule->max_eirp); 2011b2e1b302SLuis R. Rodriguez else 2012e9c0268fSJoe Perches pr_info(" (%d KHz - %d KHz @ %d KHz), (N/A, %d mBm)\n", 2013b2e1b302SLuis R. Rodriguez freq_range->start_freq_khz, 2014b2e1b302SLuis R. Rodriguez freq_range->end_freq_khz, 2015b2e1b302SLuis R. Rodriguez freq_range->max_bandwidth_khz, 2016b2e1b302SLuis R. Rodriguez power_rule->max_eirp); 2017b2e1b302SLuis R. Rodriguez } 2018b2e1b302SLuis R. Rodriguez } 2019b2e1b302SLuis R. Rodriguez 20208b60b078SLuis R. Rodriguez bool reg_supported_dfs_region(u8 dfs_region) 20218b60b078SLuis R. Rodriguez { 20228b60b078SLuis R. Rodriguez switch (dfs_region) { 20238b60b078SLuis R. Rodriguez case NL80211_DFS_UNSET: 20248b60b078SLuis R. Rodriguez case NL80211_DFS_FCC: 20258b60b078SLuis R. Rodriguez case NL80211_DFS_ETSI: 20268b60b078SLuis R. Rodriguez case NL80211_DFS_JP: 20278b60b078SLuis R. Rodriguez return true; 20288b60b078SLuis R. Rodriguez default: 20298b60b078SLuis R. Rodriguez REG_DBG_PRINT("Ignoring uknown DFS master region: %d\n", 20308b60b078SLuis R. Rodriguez dfs_region); 20318b60b078SLuis R. Rodriguez return false; 20328b60b078SLuis R. Rodriguez } 20338b60b078SLuis R. Rodriguez } 20348b60b078SLuis R. Rodriguez 20358b60b078SLuis R. Rodriguez static void print_dfs_region(u8 dfs_region) 20368b60b078SLuis R. Rodriguez { 20378b60b078SLuis R. Rodriguez if (!dfs_region) 20388b60b078SLuis R. Rodriguez return; 20398b60b078SLuis R. Rodriguez 20408b60b078SLuis R. Rodriguez switch (dfs_region) { 20418b60b078SLuis R. Rodriguez case NL80211_DFS_FCC: 20428b60b078SLuis R. Rodriguez pr_info(" DFS Master region FCC"); 20438b60b078SLuis R. Rodriguez break; 20448b60b078SLuis R. Rodriguez case NL80211_DFS_ETSI: 20458b60b078SLuis R. Rodriguez pr_info(" DFS Master region ETSI"); 20468b60b078SLuis R. Rodriguez break; 20478b60b078SLuis R. Rodriguez case NL80211_DFS_JP: 20488b60b078SLuis R. Rodriguez pr_info(" DFS Master region JP"); 20498b60b078SLuis R. Rodriguez break; 20508b60b078SLuis R. Rodriguez default: 20511a919318SJohannes Berg pr_info(" DFS Master region Unknown"); 20528b60b078SLuis R. Rodriguez break; 20538b60b078SLuis R. Rodriguez } 20548b60b078SLuis R. Rodriguez } 20558b60b078SLuis R. Rodriguez 2056a3d2eaf0SJohannes Berg static void print_regdomain(const struct ieee80211_regdomain *rd) 2057b2e1b302SLuis R. Rodriguez { 2058c492db37SJohannes Berg struct regulatory_request *lr = get_last_request(); 2059b2e1b302SLuis R. Rodriguez 20603f2355cbSLuis R. Rodriguez if (is_intersected_alpha2(rd->alpha2)) { 2061c492db37SJohannes Berg if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) { 206279c97e97SJohannes Berg struct cfg80211_registered_device *rdev; 2063c492db37SJohannes Berg rdev = cfg80211_rdev_by_wiphy_idx(lr->wiphy_idx); 206479c97e97SJohannes Berg if (rdev) { 2065e9c0268fSJoe Perches pr_info("Current regulatory domain updated by AP to: %c%c\n", 206679c97e97SJohannes Berg rdev->country_ie_alpha2[0], 206779c97e97SJohannes Berg rdev->country_ie_alpha2[1]); 20683f2355cbSLuis R. Rodriguez } else 2069e9c0268fSJoe Perches pr_info("Current regulatory domain intersected:\n"); 20703f2355cbSLuis R. Rodriguez } else 2071e9c0268fSJoe Perches pr_info("Current regulatory domain intersected:\n"); 20721a919318SJohannes Berg } else if (is_world_regdom(rd->alpha2)) { 2073e9c0268fSJoe Perches pr_info("World regulatory domain updated:\n"); 20741a919318SJohannes Berg } else { 2075b2e1b302SLuis R. Rodriguez if (is_unknown_alpha2(rd->alpha2)) 2076e9c0268fSJoe Perches pr_info("Regulatory domain changed to driver built-in settings (unknown country)\n"); 207757b5ce07SLuis R. Rodriguez else { 2078c492db37SJohannes Berg if (reg_request_cell_base(lr)) 20791a919318SJohannes Berg pr_info("Regulatory domain changed to country: %c%c by Cell Station\n", 2080b2e1b302SLuis R. Rodriguez rd->alpha2[0], rd->alpha2[1]); 208157b5ce07SLuis R. Rodriguez else 20821a919318SJohannes Berg pr_info("Regulatory domain changed to country: %c%c\n", 208357b5ce07SLuis R. Rodriguez rd->alpha2[0], rd->alpha2[1]); 208457b5ce07SLuis R. Rodriguez } 2085b2e1b302SLuis R. Rodriguez } 20861a919318SJohannes Berg 20878b60b078SLuis R. Rodriguez print_dfs_region(rd->dfs_region); 2088b2e1b302SLuis R. Rodriguez print_rd_rules(rd); 2089b2e1b302SLuis R. Rodriguez } 2090b2e1b302SLuis R. Rodriguez 20912df78167SJohannes Berg static void print_regdomain_info(const struct ieee80211_regdomain *rd) 2092b2e1b302SLuis R. Rodriguez { 2093e9c0268fSJoe Perches pr_info("Regulatory domain: %c%c\n", rd->alpha2[0], rd->alpha2[1]); 2094b2e1b302SLuis R. Rodriguez print_rd_rules(rd); 2095b2e1b302SLuis R. Rodriguez } 2096b2e1b302SLuis R. Rodriguez 2097d2372b31SJohannes Berg /* Takes ownership of rd only if it doesn't fail */ 2098a3d2eaf0SJohannes Berg static int __set_regdom(const struct ieee80211_regdomain *rd) 2099b2e1b302SLuis R. Rodriguez { 2100e9763c3cSJohannes Berg const struct ieee80211_regdomain *regd; 21019c96477dSLuis R. Rodriguez const struct ieee80211_regdomain *intersected_rd = NULL; 2102806a9e39SLuis R. Rodriguez struct wiphy *request_wiphy; 2103c492db37SJohannes Berg struct regulatory_request *lr = get_last_request(); 21046913b49aSJohannes Berg 2105b2e1b302SLuis R. Rodriguez /* Some basic sanity checks first */ 2106b2e1b302SLuis R. Rodriguez 21076913b49aSJohannes Berg if (!reg_is_valid_request(rd->alpha2)) 2108b2e1b302SLuis R. Rodriguez return -EINVAL; 21096913b49aSJohannes Berg 21106913b49aSJohannes Berg if (is_world_regdom(rd->alpha2)) { 2111b2e1b302SLuis R. Rodriguez update_world_regdomain(rd); 2112b2e1b302SLuis R. Rodriguez return 0; 2113b2e1b302SLuis R. Rodriguez } 2114b2e1b302SLuis R. Rodriguez 2115b2e1b302SLuis R. Rodriguez if (!is_alpha2_set(rd->alpha2) && !is_an_alpha2(rd->alpha2) && 2116b2e1b302SLuis R. Rodriguez !is_unknown_alpha2(rd->alpha2)) 2117b2e1b302SLuis R. Rodriguez return -EINVAL; 2118b2e1b302SLuis R. Rodriguez 2119fb1fc7adSLuis R. Rodriguez /* 2120fb1fc7adSLuis R. Rodriguez * Lets only bother proceeding on the same alpha2 if the current 21213f2355cbSLuis R. Rodriguez * rd is non static (it means CRDA was present and was used last) 2122fb1fc7adSLuis R. Rodriguez * and the pending request came in from a country IE 2123fb1fc7adSLuis R. Rodriguez */ 2124c492db37SJohannes Berg if (lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE) { 2125fb1fc7adSLuis R. Rodriguez /* 2126fb1fc7adSLuis R. Rodriguez * If someone else asked us to change the rd lets only bother 2127fb1fc7adSLuis R. Rodriguez * checking if the alpha2 changes if CRDA was already called 2128fb1fc7adSLuis R. Rodriguez */ 2129baeb66feSJohn W. Linville if (!regdom_changes(rd->alpha2)) 213095908535SKalle Valo return -EALREADY; 21313f2355cbSLuis R. Rodriguez } 21323f2355cbSLuis R. Rodriguez 2133fb1fc7adSLuis R. Rodriguez /* 2134fb1fc7adSLuis R. Rodriguez * Now lets set the regulatory domain, update all driver channels 2135b2e1b302SLuis R. Rodriguez * and finally inform them of what we have done, in case they want 2136b2e1b302SLuis R. Rodriguez * to review or adjust their own settings based on their own 2137fb1fc7adSLuis R. Rodriguez * internal EEPROM data 2138fb1fc7adSLuis R. Rodriguez */ 2139b2e1b302SLuis R. Rodriguez 2140b2e1b302SLuis R. Rodriguez if (!is_valid_rd(rd)) { 2141e9c0268fSJoe Perches pr_err("Invalid regulatory domain detected:\n"); 2142b2e1b302SLuis R. Rodriguez print_regdomain_info(rd); 2143b2e1b302SLuis R. Rodriguez return -EINVAL; 2144b2e1b302SLuis R. Rodriguez } 2145b2e1b302SLuis R. Rodriguez 2146c492db37SJohannes Berg request_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx); 21470bac71afSLuis R. Rodriguez if (!request_wiphy && 2148c492db37SJohannes Berg (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER || 2149c492db37SJohannes Berg lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE)) { 21500bac71afSLuis R. Rodriguez schedule_delayed_work(®_timeout, 0); 2151de3584bdSJohannes Berg return -ENODEV; 2152de3584bdSJohannes Berg } 2153806a9e39SLuis R. Rodriguez 2154c492db37SJohannes Berg if (!lr->intersect) { 2155c492db37SJohannes Berg if (lr->initiator != NL80211_REGDOM_SET_BY_DRIVER) { 2156379b82f4SJohannes Berg reset_regdomains(false, rd); 21573e0c3ff3SLuis R. Rodriguez return 0; 21583e0c3ff3SLuis R. Rodriguez } 21593e0c3ff3SLuis R. Rodriguez 2160fb1fc7adSLuis R. Rodriguez /* 2161fb1fc7adSLuis R. Rodriguez * For a driver hint, lets copy the regulatory domain the 2162fb1fc7adSLuis R. Rodriguez * driver wanted to the wiphy to deal with conflicts 2163fb1fc7adSLuis R. Rodriguez */ 21643e0c3ff3SLuis R. Rodriguez 2165558f6d32SLuis R. Rodriguez /* 2166558f6d32SLuis R. Rodriguez * Userspace could have sent two replies with only 2167558f6d32SLuis R. Rodriguez * one kernel request. 2168558f6d32SLuis R. Rodriguez */ 2169558f6d32SLuis R. Rodriguez if (request_wiphy->regd) 2170558f6d32SLuis R. Rodriguez return -EALREADY; 21713e0c3ff3SLuis R. Rodriguez 2172e9763c3cSJohannes Berg regd = reg_copy_regd(rd); 2173e9763c3cSJohannes Berg if (IS_ERR(regd)) 2174e9763c3cSJohannes Berg return PTR_ERR(regd); 21753e0c3ff3SLuis R. Rodriguez 2176458f4f9eSJohannes Berg rcu_assign_pointer(request_wiphy->regd, regd); 2177379b82f4SJohannes Berg reset_regdomains(false, rd); 2178b8295acdSLuis R. Rodriguez return 0; 2179b8295acdSLuis R. Rodriguez } 2180b8295acdSLuis R. Rodriguez 2181b8295acdSLuis R. Rodriguez /* Intersection requires a bit more work */ 2182b8295acdSLuis R. Rodriguez 2183c492db37SJohannes Berg if (lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE) { 2184458f4f9eSJohannes Berg intersected_rd = regdom_intersect(rd, get_cfg80211_regdom()); 21859c96477dSLuis R. Rodriguez if (!intersected_rd) 21869c96477dSLuis R. Rodriguez return -EINVAL; 2187b8295acdSLuis R. Rodriguez 2188fb1fc7adSLuis R. Rodriguez /* 2189fb1fc7adSLuis R. Rodriguez * We can trash what CRDA provided now. 21903e0c3ff3SLuis R. Rodriguez * However if a driver requested this specific regulatory 2191fb1fc7adSLuis R. Rodriguez * domain we keep it for its private use 2192fb1fc7adSLuis R. Rodriguez */ 2193b7566fc3SLarry Finger if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER) { 2194b7566fc3SLarry Finger const struct ieee80211_regdomain *tmp; 2195b7566fc3SLarry Finger 2196b7566fc3SLarry Finger tmp = get_wiphy_regdom(request_wiphy); 2197458f4f9eSJohannes Berg rcu_assign_pointer(request_wiphy->regd, rd); 2198b7566fc3SLarry Finger rcu_free_regdom(tmp); 2199b7566fc3SLarry Finger } else { 22009c96477dSLuis R. Rodriguez kfree(rd); 2201b7566fc3SLarry Finger } 22023e0c3ff3SLuis R. Rodriguez 2203b8295acdSLuis R. Rodriguez rd = NULL; 2204b8295acdSLuis R. Rodriguez 2205379b82f4SJohannes Berg reset_regdomains(false, intersected_rd); 2206b8295acdSLuis R. Rodriguez 2207b8295acdSLuis R. Rodriguez return 0; 22089c96477dSLuis R. Rodriguez } 22099c96477dSLuis R. Rodriguez 22103f2355cbSLuis R. Rodriguez return -EINVAL; 2211b2e1b302SLuis R. Rodriguez } 2212b2e1b302SLuis R. Rodriguez 2213b2e1b302SLuis R. Rodriguez 2214fb1fc7adSLuis R. Rodriguez /* 2215fb1fc7adSLuis R. Rodriguez * Use this call to set the current regulatory domain. Conflicts with 2216b2e1b302SLuis R. Rodriguez * multiple drivers can be ironed out later. Caller must've already 2217458f4f9eSJohannes Berg * kmalloc'd the rd structure. 2218fb1fc7adSLuis R. Rodriguez */ 2219a3d2eaf0SJohannes Berg int set_regdom(const struct ieee80211_regdomain *rd) 2220b2e1b302SLuis R. Rodriguez { 2221c492db37SJohannes Berg struct regulatory_request *lr; 2222b2e1b302SLuis R. Rodriguez int r; 2223b2e1b302SLuis R. Rodriguez 2224c492db37SJohannes Berg lr = get_last_request(); 2225abc7381bSLuis R. Rodriguez 2226b2e1b302SLuis R. Rodriguez /* Note that this doesn't update the wiphys, this is done below */ 2227b2e1b302SLuis R. Rodriguez r = __set_regdom(rd); 2228d2372b31SJohannes Berg if (r) { 222995908535SKalle Valo if (r == -EALREADY) 223095908535SKalle Valo reg_set_request_processed(); 223195908535SKalle Valo 2232d2372b31SJohannes Berg kfree(rd); 223338fd2143SJohannes Berg return r; 2234d2372b31SJohannes Berg } 2235b2e1b302SLuis R. Rodriguez 2236b2e1b302SLuis R. Rodriguez /* This would make this whole thing pointless */ 223738fd2143SJohannes Berg if (WARN_ON(!lr->intersect && rd != get_cfg80211_regdom())) 223838fd2143SJohannes Berg return -EINVAL; 2239b2e1b302SLuis R. Rodriguez 2240b2e1b302SLuis R. Rodriguez /* update all wiphys now with the new established regulatory domain */ 2241c492db37SJohannes Berg update_all_wiphy_regulatory(lr->initiator); 2242b2e1b302SLuis R. Rodriguez 2243458f4f9eSJohannes Berg print_regdomain(get_cfg80211_regdom()); 2244b2e1b302SLuis R. Rodriguez 2245c492db37SJohannes Berg nl80211_send_reg_change_event(lr); 224673d54c9eSLuis R. Rodriguez 2247b2e253cfSLuis R. Rodriguez reg_set_request_processed(); 2248b2e253cfSLuis R. Rodriguez 224938fd2143SJohannes Berg return 0; 2250b2e1b302SLuis R. Rodriguez } 2251b2e1b302SLuis R. Rodriguez 22524d9d88d1SScott James Remnant int reg_device_uevent(struct device *dev, struct kobj_uevent_env *env) 22534d9d88d1SScott James Remnant { 22544a484cffSJohannes Berg struct regulatory_request *lr; 22554a484cffSJohannes Berg u8 alpha2[2]; 22564a484cffSJohannes Berg bool add = false; 22574d9d88d1SScott James Remnant 22584a484cffSJohannes Berg rcu_read_lock(); 22594a484cffSJohannes Berg lr = get_last_request(); 2260c492db37SJohannes Berg if (lr && !lr->processed) { 22614a484cffSJohannes Berg memcpy(alpha2, lr->alpha2, 2); 22624a484cffSJohannes Berg add = true; 22634d9d88d1SScott James Remnant } 22644a484cffSJohannes Berg rcu_read_unlock(); 22654d9d88d1SScott James Remnant 22664a484cffSJohannes Berg if (add) 22674a484cffSJohannes Berg return add_uevent_var(env, "COUNTRY=%c%c", 22684a484cffSJohannes Berg alpha2[0], alpha2[1]); 22694d9d88d1SScott James Remnant return 0; 22704d9d88d1SScott James Remnant } 22714d9d88d1SScott James Remnant 227257b5ce07SLuis R. Rodriguez void wiphy_regulatory_register(struct wiphy *wiphy) 227357b5ce07SLuis R. Rodriguez { 227423df0b73SArik Nemtsov struct regulatory_request *lr; 227523df0b73SArik Nemtsov 227657b5ce07SLuis R. Rodriguez if (!reg_dev_ignore_cell_hint(wiphy)) 227757b5ce07SLuis R. Rodriguez reg_num_devs_support_basehint++; 227857b5ce07SLuis R. Rodriguez 227923df0b73SArik Nemtsov lr = get_last_request(); 228023df0b73SArik Nemtsov wiphy_update_regulatory(wiphy, lr->initiator); 228157b5ce07SLuis R. Rodriguez } 228257b5ce07SLuis R. Rodriguez 2283bfead080SLuis R. Rodriguez void wiphy_regulatory_deregister(struct wiphy *wiphy) 22843f2355cbSLuis R. Rodriguez { 22850ad8acafSLuis R. Rodriguez struct wiphy *request_wiphy = NULL; 2286c492db37SJohannes Berg struct regulatory_request *lr; 2287761cf7ecSLuis R. Rodriguez 2288c492db37SJohannes Berg lr = get_last_request(); 2289abc7381bSLuis R. Rodriguez 229057b5ce07SLuis R. Rodriguez if (!reg_dev_ignore_cell_hint(wiphy)) 229157b5ce07SLuis R. Rodriguez reg_num_devs_support_basehint--; 229257b5ce07SLuis R. Rodriguez 2293458f4f9eSJohannes Berg rcu_free_regdom(get_wiphy_regdom(wiphy)); 2294458f4f9eSJohannes Berg rcu_assign_pointer(wiphy->regd, NULL); 22950ef9ccddSChris Wright 2296c492db37SJohannes Berg if (lr) 2297c492db37SJohannes Berg request_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx); 2298806a9e39SLuis R. Rodriguez 22990ef9ccddSChris Wright if (!request_wiphy || request_wiphy != wiphy) 230038fd2143SJohannes Berg return; 23010ef9ccddSChris Wright 2302c492db37SJohannes Berg lr->wiphy_idx = WIPHY_IDX_INVALID; 2303c492db37SJohannes Berg lr->country_ie_env = ENVIRON_ANY; 23043f2355cbSLuis R. Rodriguez } 23053f2355cbSLuis R. Rodriguez 2306a90c7a31SLuis R. Rodriguez static void reg_timeout_work(struct work_struct *work) 2307a90c7a31SLuis R. Rodriguez { 23081a919318SJohannes Berg REG_DBG_PRINT("Timeout while waiting for CRDA to reply, restoring regulatory settings\n"); 2309f77b86d7SJohannes Berg rtnl_lock(); 2310a90c7a31SLuis R. Rodriguez restore_regulatory_settings(true); 2311f77b86d7SJohannes Berg rtnl_unlock(); 2312a90c7a31SLuis R. Rodriguez } 2313a90c7a31SLuis R. Rodriguez 23142fcc9f73SUwe Kleine-König int __init regulatory_init(void) 2315b2e1b302SLuis R. Rodriguez { 2316bcf4f99bSLuis R. Rodriguez int err = 0; 2317734366deSJohannes Berg 2318b2e1b302SLuis R. Rodriguez reg_pdev = platform_device_register_simple("regulatory", 0, NULL, 0); 2319b2e1b302SLuis R. Rodriguez if (IS_ERR(reg_pdev)) 2320b2e1b302SLuis R. Rodriguez return PTR_ERR(reg_pdev); 2321734366deSJohannes Berg 23224d9d88d1SScott James Remnant reg_pdev->dev.type = ®_device_type; 23234d9d88d1SScott James Remnant 2324fe33eb39SLuis R. Rodriguez spin_lock_init(®_requests_lock); 2325e38f8a7aSLuis R. Rodriguez spin_lock_init(®_pending_beacons_lock); 2326fe33eb39SLuis R. Rodriguez 232780007efeSLuis R. Rodriguez reg_regdb_size_check(); 232880007efeSLuis R. Rodriguez 2329458f4f9eSJohannes Berg rcu_assign_pointer(cfg80211_regdomain, cfg80211_world_regdom); 2330734366deSJohannes Berg 233109d989d1SLuis R. Rodriguez user_alpha2[0] = '9'; 233209d989d1SLuis R. Rodriguez user_alpha2[1] = '7'; 233309d989d1SLuis R. Rodriguez 2334ae9e4b0dSLuis R. Rodriguez /* We always try to get an update for the static regdomain */ 2335458f4f9eSJohannes Berg err = regulatory_hint_core(cfg80211_world_regdom->alpha2); 2336bcf4f99bSLuis R. Rodriguez if (err) { 2337bcf4f99bSLuis R. Rodriguez if (err == -ENOMEM) 2338bcf4f99bSLuis R. Rodriguez return err; 2339bcf4f99bSLuis R. Rodriguez /* 2340bcf4f99bSLuis R. Rodriguez * N.B. kobject_uevent_env() can fail mainly for when we're out 2341bcf4f99bSLuis R. Rodriguez * memory which is handled and propagated appropriately above 2342bcf4f99bSLuis R. Rodriguez * but it can also fail during a netlink_broadcast() or during 2343bcf4f99bSLuis R. Rodriguez * early boot for call_usermodehelper(). For now treat these 2344bcf4f99bSLuis R. Rodriguez * errors as non-fatal. 2345bcf4f99bSLuis R. Rodriguez */ 2346e9c0268fSJoe Perches pr_err("kobject_uevent_env() was unable to call CRDA during init\n"); 2347bcf4f99bSLuis R. Rodriguez } 2348734366deSJohannes Berg 2349ae9e4b0dSLuis R. Rodriguez /* 2350ae9e4b0dSLuis R. Rodriguez * Finally, if the user set the module parameter treat it 2351ae9e4b0dSLuis R. Rodriguez * as a user hint. 2352ae9e4b0dSLuis R. Rodriguez */ 2353ae9e4b0dSLuis R. Rodriguez if (!is_world_regdom(ieee80211_regdom)) 235457b5ce07SLuis R. Rodriguez regulatory_hint_user(ieee80211_regdom, 235557b5ce07SLuis R. Rodriguez NL80211_USER_REG_HINT_USER); 2356ae9e4b0dSLuis R. Rodriguez 2357b2e1b302SLuis R. Rodriguez return 0; 2358b2e1b302SLuis R. Rodriguez } 2359b2e1b302SLuis R. Rodriguez 23601a919318SJohannes Berg void regulatory_exit(void) 2361b2e1b302SLuis R. Rodriguez { 2362fe33eb39SLuis R. Rodriguez struct regulatory_request *reg_request, *tmp; 2363e38f8a7aSLuis R. Rodriguez struct reg_beacon *reg_beacon, *btmp; 2364fe33eb39SLuis R. Rodriguez 2365fe33eb39SLuis R. Rodriguez cancel_work_sync(®_work); 2366a90c7a31SLuis R. Rodriguez cancel_delayed_work_sync(®_timeout); 2367fe33eb39SLuis R. Rodriguez 23689027b149SJohannes Berg /* Lock to suppress warnings */ 236938fd2143SJohannes Berg rtnl_lock(); 2370379b82f4SJohannes Berg reset_regdomains(true, NULL); 237138fd2143SJohannes Berg rtnl_unlock(); 2372734366deSJohannes Berg 237358ebacc6SLuis R. Rodriguez dev_set_uevent_suppress(®_pdev->dev, true); 2374f6037d09SJohannes Berg 2375b2e1b302SLuis R. Rodriguez platform_device_unregister(reg_pdev); 2376734366deSJohannes Berg 2377fea9bcedSJohannes Berg list_for_each_entry_safe(reg_beacon, btmp, ®_pending_beacons, list) { 2378e38f8a7aSLuis R. Rodriguez list_del(®_beacon->list); 2379e38f8a7aSLuis R. Rodriguez kfree(reg_beacon); 2380e38f8a7aSLuis R. Rodriguez } 2381e38f8a7aSLuis R. Rodriguez 2382fea9bcedSJohannes Berg list_for_each_entry_safe(reg_beacon, btmp, ®_beacon_list, list) { 2383e38f8a7aSLuis R. Rodriguez list_del(®_beacon->list); 2384e38f8a7aSLuis R. Rodriguez kfree(reg_beacon); 2385e38f8a7aSLuis R. Rodriguez } 2386e38f8a7aSLuis R. Rodriguez 2387fea9bcedSJohannes Berg list_for_each_entry_safe(reg_request, tmp, ®_requests_list, list) { 2388fe33eb39SLuis R. Rodriguez list_del(®_request->list); 2389fe33eb39SLuis R. Rodriguez kfree(reg_request); 2390fe33eb39SLuis R. Rodriguez } 2391fe33eb39SLuis R. Rodriguez } 2392