Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2002-2005, Instant802 Networks, Inc. |
| 3 | * Copyright 2005-2006, Devicescape Software, Inc. |
| 4 | * Copyright 2007 Johannes Berg <johannes@sipsolutions.net> |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 5 | * Copyright 2008 Luis R. Rodriguez <lrodriguz@atheros.com> |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 6 | * |
| 7 | * This program is free software; you can redistribute it and/or modify |
| 8 | * it under the terms of the GNU General Public License version 2 as |
| 9 | * published by the Free Software Foundation. |
| 10 | */ |
| 11 | |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 12 | /** |
| 13 | * DOC: Wireless regulatory infrastructure |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 14 | * |
| 15 | * The usual implementation is for a driver to read a device EEPROM to |
| 16 | * determine which regulatory domain it should be operating under, then |
| 17 | * looking up the allowable channels in a driver-local table and finally |
| 18 | * registering those channels in the wiphy structure. |
| 19 | * |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 20 | * Another set of compliance enforcement is for drivers to use their |
| 21 | * own compliance limits which can be stored on the EEPROM. The host |
| 22 | * driver or firmware may ensure these are used. |
| 23 | * |
| 24 | * In addition to all this we provide an extra layer of regulatory |
| 25 | * conformance. For drivers which do not have any regulatory |
| 26 | * information CRDA provides the complete regulatory solution. |
| 27 | * For others it provides a community effort on further restrictions |
| 28 | * to enhance compliance. |
| 29 | * |
| 30 | * Note: When number of rules --> infinity we will not be able to |
| 31 | * index on alpha2 any more, instead we'll probably have to |
| 32 | * rely on some SHA1 checksum of the regdomain for example. |
| 33 | * |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 34 | */ |
Joe Perches | e9c0268 | 2010-11-16 19:56:49 -0800 | [diff] [blame] | 35 | |
| 36 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
| 37 | |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 38 | #include <linux/kernel.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 39 | #include <linux/slab.h> |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 40 | #include <linux/list.h> |
| 41 | #include <linux/random.h> |
John W. Linville | c61029c | 2010-08-05 14:26:24 -0400 | [diff] [blame] | 42 | #include <linux/ctype.h> |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 43 | #include <linux/nl80211.h> |
| 44 | #include <linux/platform_device.h> |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 45 | #include <net/cfg80211.h> |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 46 | #include "core.h" |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 47 | #include "reg.h" |
John W. Linville | 3b377ea | 2009-12-18 17:59:01 -0500 | [diff] [blame] | 48 | #include "regdb.h" |
Luis R. Rodriguez | 73d54c9 | 2009-03-09 22:07:42 -0400 | [diff] [blame] | 49 | #include "nl80211.h" |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 50 | |
Luis R. Rodriguez | 4113f75 | 2010-01-04 11:50:11 -0500 | [diff] [blame] | 51 | #ifdef CONFIG_CFG80211_REG_DEBUG |
Joe Perches | 12c5ffb | 2011-07-29 14:51:25 -0700 | [diff] [blame] | 52 | #define REG_DBG_PRINT(format, args...) \ |
| 53 | printk(KERN_DEBUG pr_fmt(format), ##args) |
Luis R. Rodriguez | 4113f75 | 2010-01-04 11:50:11 -0500 | [diff] [blame] | 54 | #else |
John W. Linville | 8271195 | 2010-01-05 17:57:20 -0500 | [diff] [blame] | 55 | #define REG_DBG_PRINT(args...) |
Luis R. Rodriguez | 4113f75 | 2010-01-04 11:50:11 -0500 | [diff] [blame] | 56 | #endif |
| 57 | |
Luis R. Rodriguez | 5166ccd | 2008-10-30 13:33:56 -0700 | [diff] [blame] | 58 | /* Receipt of information from last regulatory request */ |
Johannes Berg | f6037d0 | 2008-10-21 11:01:33 +0200 | [diff] [blame] | 59 | static struct regulatory_request *last_request; |
Johannes Berg | 734366d | 2008-09-15 10:56:48 +0200 | [diff] [blame] | 60 | |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 61 | /* To trigger userspace events */ |
| 62 | static struct platform_device *reg_pdev; |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 63 | |
Scott James Remnant | 4d9d88d | 2011-03-08 10:45:30 -0800 | [diff] [blame] | 64 | static struct device_type reg_device_type = { |
| 65 | .uevent = reg_device_uevent, |
| 66 | }; |
| 67 | |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 68 | /* |
| 69 | * Central wireless core regulatory domains, we only need two, |
Johannes Berg | 734366d | 2008-09-15 10:56:48 +0200 | [diff] [blame] | 70 | * the current one and a world regulatory domain in case we have no |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 71 | * information to give us an alpha2 |
| 72 | */ |
Luis R. Rodriguez | f130347 | 2009-01-30 09:26:42 -0800 | [diff] [blame] | 73 | const struct ieee80211_regdomain *cfg80211_regdomain; |
Johannes Berg | 734366d | 2008-09-15 10:56:48 +0200 | [diff] [blame] | 74 | |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 75 | /* |
Luis R. Rodriguez | abc7381 | 2009-07-30 17:38:08 -0700 | [diff] [blame] | 76 | * Protects static reg.c components: |
| 77 | * - cfg80211_world_regdom |
| 78 | * - cfg80211_regdom |
Luis R. Rodriguez | abc7381 | 2009-07-30 17:38:08 -0700 | [diff] [blame] | 79 | * - last_request |
| 80 | */ |
John W. Linville | 670b7f1 | 2010-06-24 11:26:31 -0400 | [diff] [blame] | 81 | static DEFINE_MUTEX(reg_mutex); |
Johannes Berg | 46a5eba | 2010-09-15 13:28:15 +0200 | [diff] [blame] | 82 | |
| 83 | static inline void assert_reg_lock(void) |
| 84 | { |
| 85 | lockdep_assert_held(®_mutex); |
| 86 | } |
Luis R. Rodriguez | abc7381 | 2009-07-30 17:38:08 -0700 | [diff] [blame] | 87 | |
Luis R. Rodriguez | e38f8a7 | 2009-02-21 00:20:39 -0500 | [diff] [blame] | 88 | /* Used to queue up regulatory hints */ |
Luis R. Rodriguez | fe33eb3 | 2009-02-21 00:04:30 -0500 | [diff] [blame] | 89 | static LIST_HEAD(reg_requests_list); |
| 90 | static spinlock_t reg_requests_lock; |
| 91 | |
Luis R. Rodriguez | e38f8a7 | 2009-02-21 00:20:39 -0500 | [diff] [blame] | 92 | /* Used to queue up beacon hints for review */ |
| 93 | static LIST_HEAD(reg_pending_beacons); |
| 94 | static spinlock_t reg_pending_beacons_lock; |
| 95 | |
| 96 | /* Used to keep track of processed beacon hints */ |
| 97 | static LIST_HEAD(reg_beacon_list); |
| 98 | |
| 99 | struct reg_beacon { |
| 100 | struct list_head list; |
| 101 | struct ieee80211_channel chan; |
| 102 | }; |
| 103 | |
Luis R. Rodriguez | f333a7a | 2010-11-17 21:46:07 -0800 | [diff] [blame] | 104 | static void reg_todo(struct work_struct *work); |
| 105 | static DECLARE_WORK(reg_work, reg_todo); |
| 106 | |
Luis R. Rodriguez | a90c7a3 | 2011-04-05 10:49:04 -0700 | [diff] [blame] | 107 | static void reg_timeout_work(struct work_struct *work); |
| 108 | static DECLARE_DELAYED_WORK(reg_timeout, reg_timeout_work); |
| 109 | |
Johannes Berg | 734366d | 2008-09-15 10:56:48 +0200 | [diff] [blame] | 110 | /* We keep a static world regulatory domain in case of the absence of CRDA */ |
| 111 | static const struct ieee80211_regdomain world_regdom = { |
Luis R. Rodriguez | 611b6a8 | 2009-03-05 21:19:21 -0800 | [diff] [blame] | 112 | .n_reg_rules = 5, |
Johannes Berg | 734366d | 2008-09-15 10:56:48 +0200 | [diff] [blame] | 113 | .alpha2 = "00", |
| 114 | .reg_rules = { |
Luis R. Rodriguez | 68798a6 | 2009-02-21 00:20:37 -0500 | [diff] [blame] | 115 | /* IEEE 802.11b/g, channels 1..11 */ |
| 116 | REG_RULE(2412-10, 2462+10, 40, 6, 20, 0), |
Luis R. Rodriguez | 611b6a8 | 2009-03-05 21:19:21 -0800 | [diff] [blame] | 117 | /* IEEE 802.11b/g, channels 12..13. No HT40 |
| 118 | * channel fits here. */ |
| 119 | REG_RULE(2467-10, 2472+10, 20, 6, 20, |
Luis R. Rodriguez | 3fc71f7 | 2009-02-21 00:20:38 -0500 | [diff] [blame] | 120 | NL80211_RRF_PASSIVE_SCAN | |
| 121 | NL80211_RRF_NO_IBSS), |
Luis R. Rodriguez | 611b6a8 | 2009-03-05 21:19:21 -0800 | [diff] [blame] | 122 | /* IEEE 802.11 channel 14 - Only JP enables |
| 123 | * this and for 802.11b only */ |
| 124 | REG_RULE(2484-10, 2484+10, 20, 6, 20, |
| 125 | NL80211_RRF_PASSIVE_SCAN | |
| 126 | NL80211_RRF_NO_IBSS | |
| 127 | NL80211_RRF_NO_OFDM), |
| 128 | /* IEEE 802.11a, channel 36..48 */ |
Luis R. Rodriguez | ec329ac | 2009-03-05 21:19:22 -0800 | [diff] [blame] | 129 | REG_RULE(5180-10, 5240+10, 40, 6, 20, |
Luis R. Rodriguez | 611b6a8 | 2009-03-05 21:19:21 -0800 | [diff] [blame] | 130 | NL80211_RRF_PASSIVE_SCAN | |
| 131 | NL80211_RRF_NO_IBSS), |
Luis R. Rodriguez | 3fc71f7 | 2009-02-21 00:20:38 -0500 | [diff] [blame] | 132 | |
| 133 | /* NB: 5260 MHz - 5700 MHz requies DFS */ |
| 134 | |
| 135 | /* IEEE 802.11a, channel 149..165 */ |
Luis R. Rodriguez | ec329ac | 2009-03-05 21:19:22 -0800 | [diff] [blame] | 136 | REG_RULE(5745-10, 5825+10, 40, 6, 20, |
Luis R. Rodriguez | 3fc71f7 | 2009-02-21 00:20:38 -0500 | [diff] [blame] | 137 | NL80211_RRF_PASSIVE_SCAN | |
| 138 | NL80211_RRF_NO_IBSS), |
Johannes Berg | 734366d | 2008-09-15 10:56:48 +0200 | [diff] [blame] | 139 | } |
| 140 | }; |
| 141 | |
Johannes Berg | a3d2eaf | 2008-09-15 11:10:52 +0200 | [diff] [blame] | 142 | static const struct ieee80211_regdomain *cfg80211_world_regdom = |
| 143 | &world_regdom; |
Johannes Berg | 734366d | 2008-09-15 10:56:48 +0200 | [diff] [blame] | 144 | |
Luis R. Rodriguez | 6ee7d33 | 2009-03-20 23:53:06 -0400 | [diff] [blame] | 145 | static char *ieee80211_regdom = "00"; |
Luis R. Rodriguez | 09d989d | 2010-01-29 19:58:57 -0500 | [diff] [blame] | 146 | static char user_alpha2[2]; |
Luis R. Rodriguez | 6ee7d33 | 2009-03-20 23:53:06 -0400 | [diff] [blame] | 147 | |
Johannes Berg | 734366d | 2008-09-15 10:56:48 +0200 | [diff] [blame] | 148 | module_param(ieee80211_regdom, charp, 0444); |
| 149 | MODULE_PARM_DESC(ieee80211_regdom, "IEEE 802.11 regulatory domain code"); |
| 150 | |
Johannes Berg | 734366d | 2008-09-15 10:56:48 +0200 | [diff] [blame] | 151 | static void reset_regdomains(void) |
| 152 | { |
Johannes Berg | 942b25c | 2008-09-15 11:26:47 +0200 | [diff] [blame] | 153 | /* avoid freeing static information or freeing something twice */ |
| 154 | if (cfg80211_regdomain == cfg80211_world_regdom) |
| 155 | cfg80211_regdomain = NULL; |
| 156 | if (cfg80211_world_regdom == &world_regdom) |
| 157 | cfg80211_world_regdom = NULL; |
| 158 | if (cfg80211_regdomain == &world_regdom) |
| 159 | cfg80211_regdomain = NULL; |
Johannes Berg | 942b25c | 2008-09-15 11:26:47 +0200 | [diff] [blame] | 160 | |
| 161 | kfree(cfg80211_regdomain); |
| 162 | kfree(cfg80211_world_regdom); |
Johannes Berg | 734366d | 2008-09-15 10:56:48 +0200 | [diff] [blame] | 163 | |
Johannes Berg | a3d2eaf | 2008-09-15 11:10:52 +0200 | [diff] [blame] | 164 | cfg80211_world_regdom = &world_regdom; |
Johannes Berg | 734366d | 2008-09-15 10:56:48 +0200 | [diff] [blame] | 165 | cfg80211_regdomain = NULL; |
| 166 | } |
| 167 | |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 168 | /* |
| 169 | * Dynamic world regulatory domain requested by the wireless |
| 170 | * core upon initialization |
| 171 | */ |
Johannes Berg | a3d2eaf | 2008-09-15 11:10:52 +0200 | [diff] [blame] | 172 | static void update_world_regdomain(const struct ieee80211_regdomain *rd) |
Johannes Berg | 734366d | 2008-09-15 10:56:48 +0200 | [diff] [blame] | 173 | { |
Johannes Berg | f6037d0 | 2008-10-21 11:01:33 +0200 | [diff] [blame] | 174 | BUG_ON(!last_request); |
Johannes Berg | 734366d | 2008-09-15 10:56:48 +0200 | [diff] [blame] | 175 | |
| 176 | reset_regdomains(); |
| 177 | |
| 178 | cfg80211_world_regdom = rd; |
| 179 | cfg80211_regdomain = rd; |
| 180 | } |
Johannes Berg | 734366d | 2008-09-15 10:56:48 +0200 | [diff] [blame] | 181 | |
Johannes Berg | a3d2eaf | 2008-09-15 11:10:52 +0200 | [diff] [blame] | 182 | bool is_world_regdom(const char *alpha2) |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 183 | { |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 184 | if (!alpha2) |
| 185 | return false; |
| 186 | if (alpha2[0] == '0' && alpha2[1] == '0') |
| 187 | return true; |
| 188 | return false; |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 189 | } |
| 190 | |
Johannes Berg | a3d2eaf | 2008-09-15 11:10:52 +0200 | [diff] [blame] | 191 | static bool is_alpha2_set(const char *alpha2) |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 192 | { |
| 193 | if (!alpha2) |
| 194 | return false; |
| 195 | if (alpha2[0] != 0 && alpha2[1] != 0) |
| 196 | return true; |
| 197 | return false; |
| 198 | } |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 199 | |
Johannes Berg | a3d2eaf | 2008-09-15 11:10:52 +0200 | [diff] [blame] | 200 | static bool is_unknown_alpha2(const char *alpha2) |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 201 | { |
| 202 | if (!alpha2) |
| 203 | return false; |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 204 | /* |
| 205 | * Special case where regulatory domain was built by driver |
| 206 | * but a specific alpha2 cannot be determined |
| 207 | */ |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 208 | if (alpha2[0] == '9' && alpha2[1] == '9') |
| 209 | return true; |
| 210 | return false; |
| 211 | } |
| 212 | |
Luis R. Rodriguez | 3f2355c | 2008-11-12 14:22:02 -0800 | [diff] [blame] | 213 | static bool is_intersected_alpha2(const char *alpha2) |
| 214 | { |
| 215 | if (!alpha2) |
| 216 | return false; |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 217 | /* |
| 218 | * Special case where regulatory domain is the |
Luis R. Rodriguez | 3f2355c | 2008-11-12 14:22:02 -0800 | [diff] [blame] | 219 | * result of an intersection between two regulatory domain |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 220 | * structures |
| 221 | */ |
Luis R. Rodriguez | 3f2355c | 2008-11-12 14:22:02 -0800 | [diff] [blame] | 222 | if (alpha2[0] == '9' && alpha2[1] == '8') |
| 223 | return true; |
| 224 | return false; |
| 225 | } |
| 226 | |
Johannes Berg | a3d2eaf | 2008-09-15 11:10:52 +0200 | [diff] [blame] | 227 | static bool is_an_alpha2(const char *alpha2) |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 228 | { |
| 229 | if (!alpha2) |
| 230 | return false; |
John W. Linville | c61029c | 2010-08-05 14:26:24 -0400 | [diff] [blame] | 231 | if (isalpha(alpha2[0]) && isalpha(alpha2[1])) |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 232 | return true; |
| 233 | return false; |
| 234 | } |
| 235 | |
Johannes Berg | a3d2eaf | 2008-09-15 11:10:52 +0200 | [diff] [blame] | 236 | static bool alpha2_equal(const char *alpha2_x, const char *alpha2_y) |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 237 | { |
| 238 | if (!alpha2_x || !alpha2_y) |
| 239 | return false; |
| 240 | if (alpha2_x[0] == alpha2_y[0] && |
| 241 | alpha2_x[1] == alpha2_y[1]) |
| 242 | return true; |
| 243 | return false; |
| 244 | } |
| 245 | |
Luis R. Rodriguez | 69b1572 | 2009-02-21 00:04:33 -0500 | [diff] [blame] | 246 | static bool regdom_changes(const char *alpha2) |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 247 | { |
Luis R. Rodriguez | 761cf7e | 2009-02-21 00:04:25 -0500 | [diff] [blame] | 248 | assert_cfg80211_lock(); |
| 249 | |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 250 | if (!cfg80211_regdomain) |
| 251 | return true; |
| 252 | if (alpha2_equal(cfg80211_regdomain->alpha2, alpha2)) |
| 253 | return false; |
| 254 | return true; |
| 255 | } |
| 256 | |
Luis R. Rodriguez | 09d989d | 2010-01-29 19:58:57 -0500 | [diff] [blame] | 257 | /* |
| 258 | * The NL80211_REGDOM_SET_BY_USER regdom alpha2 is cached, this lets |
| 259 | * you know if a valid regulatory hint with NL80211_REGDOM_SET_BY_USER |
| 260 | * has ever been issued. |
| 261 | */ |
| 262 | static bool is_user_regdom_saved(void) |
| 263 | { |
| 264 | if (user_alpha2[0] == '9' && user_alpha2[1] == '7') |
| 265 | return false; |
| 266 | |
| 267 | /* This would indicate a mistake on the design */ |
| 268 | if (WARN((!is_world_regdom(user_alpha2) && |
| 269 | !is_an_alpha2(user_alpha2)), |
| 270 | "Unexpected user alpha2: %c%c\n", |
| 271 | user_alpha2[0], |
| 272 | user_alpha2[1])) |
| 273 | return false; |
| 274 | |
| 275 | return true; |
| 276 | } |
| 277 | |
John W. Linville | 3b377ea | 2009-12-18 17:59:01 -0500 | [diff] [blame] | 278 | static int reg_copy_regd(const struct ieee80211_regdomain **dst_regd, |
| 279 | const struct ieee80211_regdomain *src_regd) |
| 280 | { |
| 281 | struct ieee80211_regdomain *regd; |
| 282 | int size_of_regd = 0; |
| 283 | unsigned int i; |
| 284 | |
| 285 | size_of_regd = sizeof(struct ieee80211_regdomain) + |
| 286 | ((src_regd->n_reg_rules + 1) * sizeof(struct ieee80211_reg_rule)); |
| 287 | |
| 288 | regd = kzalloc(size_of_regd, GFP_KERNEL); |
| 289 | if (!regd) |
| 290 | return -ENOMEM; |
| 291 | |
| 292 | memcpy(regd, src_regd, sizeof(struct ieee80211_regdomain)); |
| 293 | |
| 294 | for (i = 0; i < src_regd->n_reg_rules; i++) |
| 295 | memcpy(®d->reg_rules[i], &src_regd->reg_rules[i], |
| 296 | sizeof(struct ieee80211_reg_rule)); |
| 297 | |
| 298 | *dst_regd = regd; |
| 299 | return 0; |
| 300 | } |
| 301 | |
| 302 | #ifdef CONFIG_CFG80211_INTERNAL_REGDB |
| 303 | struct reg_regdb_search_request { |
| 304 | char alpha2[2]; |
| 305 | struct list_head list; |
| 306 | }; |
| 307 | |
| 308 | static LIST_HEAD(reg_regdb_search_list); |
John W. Linville | 368d06f | 2010-03-16 15:40:59 -0400 | [diff] [blame] | 309 | static DEFINE_MUTEX(reg_regdb_search_mutex); |
John W. Linville | 3b377ea | 2009-12-18 17:59:01 -0500 | [diff] [blame] | 310 | |
| 311 | static void reg_regdb_search(struct work_struct *work) |
| 312 | { |
| 313 | struct reg_regdb_search_request *request; |
| 314 | const struct ieee80211_regdomain *curdom, *regdom; |
| 315 | int i, r; |
| 316 | |
John W. Linville | 368d06f | 2010-03-16 15:40:59 -0400 | [diff] [blame] | 317 | mutex_lock(®_regdb_search_mutex); |
John W. Linville | 3b377ea | 2009-12-18 17:59:01 -0500 | [diff] [blame] | 318 | while (!list_empty(®_regdb_search_list)) { |
| 319 | request = list_first_entry(®_regdb_search_list, |
| 320 | struct reg_regdb_search_request, |
| 321 | list); |
| 322 | list_del(&request->list); |
| 323 | |
| 324 | for (i=0; i<reg_regdb_size; i++) { |
| 325 | curdom = reg_regdb[i]; |
| 326 | |
| 327 | if (!memcmp(request->alpha2, curdom->alpha2, 2)) { |
| 328 | r = reg_copy_regd(®dom, curdom); |
| 329 | if (r) |
| 330 | break; |
John W. Linville | 3b377ea | 2009-12-18 17:59:01 -0500 | [diff] [blame] | 331 | mutex_lock(&cfg80211_mutex); |
| 332 | set_regdom(regdom); |
| 333 | mutex_unlock(&cfg80211_mutex); |
John W. Linville | 3b377ea | 2009-12-18 17:59:01 -0500 | [diff] [blame] | 334 | break; |
| 335 | } |
| 336 | } |
| 337 | |
| 338 | kfree(request); |
| 339 | } |
John W. Linville | 368d06f | 2010-03-16 15:40:59 -0400 | [diff] [blame] | 340 | mutex_unlock(®_regdb_search_mutex); |
John W. Linville | 3b377ea | 2009-12-18 17:59:01 -0500 | [diff] [blame] | 341 | } |
| 342 | |
| 343 | static DECLARE_WORK(reg_regdb_work, reg_regdb_search); |
| 344 | |
| 345 | static void reg_regdb_query(const char *alpha2) |
| 346 | { |
| 347 | struct reg_regdb_search_request *request; |
| 348 | |
| 349 | if (!alpha2) |
| 350 | return; |
| 351 | |
| 352 | request = kzalloc(sizeof(struct reg_regdb_search_request), GFP_KERNEL); |
| 353 | if (!request) |
| 354 | return; |
| 355 | |
| 356 | memcpy(request->alpha2, alpha2, 2); |
| 357 | |
John W. Linville | 368d06f | 2010-03-16 15:40:59 -0400 | [diff] [blame] | 358 | mutex_lock(®_regdb_search_mutex); |
John W. Linville | 3b377ea | 2009-12-18 17:59:01 -0500 | [diff] [blame] | 359 | list_add_tail(&request->list, ®_regdb_search_list); |
John W. Linville | 368d06f | 2010-03-16 15:40:59 -0400 | [diff] [blame] | 360 | mutex_unlock(®_regdb_search_mutex); |
John W. Linville | 3b377ea | 2009-12-18 17:59:01 -0500 | [diff] [blame] | 361 | |
| 362 | schedule_work(®_regdb_work); |
| 363 | } |
| 364 | #else |
| 365 | static inline void reg_regdb_query(const char *alpha2) {} |
| 366 | #endif /* CONFIG_CFG80211_INTERNAL_REGDB */ |
| 367 | |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 368 | /* |
| 369 | * This lets us keep regulatory code which is updated on a regulatory |
Scott James Remnant | 4d9d88d | 2011-03-08 10:45:30 -0800 | [diff] [blame] | 370 | * basis in userspace. Country information is filled in by |
| 371 | * reg_device_uevent |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 372 | */ |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 373 | static int call_crda(const char *alpha2) |
| 374 | { |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 375 | if (!is_world_regdom((char *) alpha2)) |
Joe Perches | e9c0268 | 2010-11-16 19:56:49 -0800 | [diff] [blame] | 376 | pr_info("Calling CRDA for country: %c%c\n", |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 377 | alpha2[0], alpha2[1]); |
| 378 | else |
Joe Perches | e9c0268 | 2010-11-16 19:56:49 -0800 | [diff] [blame] | 379 | pr_info("Calling CRDA to update world regulatory domain\n"); |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 380 | |
John W. Linville | 3b377ea | 2009-12-18 17:59:01 -0500 | [diff] [blame] | 381 | /* query internal regulatory database (if it exists) */ |
| 382 | reg_regdb_query(alpha2); |
| 383 | |
Scott James Remnant | 4d9d88d | 2011-03-08 10:45:30 -0800 | [diff] [blame] | 384 | return kobject_uevent(®_pdev->dev.kobj, KOBJ_CHANGE); |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 385 | } |
| 386 | |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 387 | /* Used by nl80211 before kmalloc'ing our regulatory domain */ |
Johannes Berg | a3d2eaf | 2008-09-15 11:10:52 +0200 | [diff] [blame] | 388 | bool reg_is_valid_request(const char *alpha2) |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 389 | { |
Luis R. Rodriguez | 61405e9 | 2009-05-13 17:04:41 -0400 | [diff] [blame] | 390 | assert_cfg80211_lock(); |
| 391 | |
Johannes Berg | f6037d0 | 2008-10-21 11:01:33 +0200 | [diff] [blame] | 392 | if (!last_request) |
| 393 | return false; |
| 394 | |
| 395 | return alpha2_equal(last_request->alpha2, alpha2); |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 396 | } |
| 397 | |
| 398 | /* Sanity check on a regulatory rule */ |
Johannes Berg | a3d2eaf | 2008-09-15 11:10:52 +0200 | [diff] [blame] | 399 | static bool is_valid_reg_rule(const struct ieee80211_reg_rule *rule) |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 400 | { |
Johannes Berg | a3d2eaf | 2008-09-15 11:10:52 +0200 | [diff] [blame] | 401 | const struct ieee80211_freq_range *freq_range = &rule->freq_range; |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 402 | u32 freq_diff; |
| 403 | |
Luis R. Rodriguez | 91e9900 | 2008-11-12 14:21:55 -0800 | [diff] [blame] | 404 | if (freq_range->start_freq_khz <= 0 || freq_range->end_freq_khz <= 0) |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 405 | return false; |
| 406 | |
| 407 | if (freq_range->start_freq_khz > freq_range->end_freq_khz) |
| 408 | return false; |
| 409 | |
| 410 | freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz; |
| 411 | |
Roel Kluin | bd05f28 | 2009-03-03 22:55:21 +0100 | [diff] [blame] | 412 | if (freq_range->end_freq_khz <= freq_range->start_freq_khz || |
| 413 | freq_range->max_bandwidth_khz > freq_diff) |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 414 | return false; |
| 415 | |
| 416 | return true; |
| 417 | } |
| 418 | |
Johannes Berg | a3d2eaf | 2008-09-15 11:10:52 +0200 | [diff] [blame] | 419 | static bool is_valid_rd(const struct ieee80211_regdomain *rd) |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 420 | { |
Johannes Berg | a3d2eaf | 2008-09-15 11:10:52 +0200 | [diff] [blame] | 421 | const struct ieee80211_reg_rule *reg_rule = NULL; |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 422 | unsigned int i; |
| 423 | |
| 424 | if (!rd->n_reg_rules) |
| 425 | return false; |
| 426 | |
Luis R. Rodriguez | 88dc1c3 | 2008-11-12 14:22:01 -0800 | [diff] [blame] | 427 | if (WARN_ON(rd->n_reg_rules > NL80211_MAX_SUPP_REG_RULES)) |
| 428 | return false; |
| 429 | |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 430 | for (i = 0; i < rd->n_reg_rules; i++) { |
| 431 | reg_rule = &rd->reg_rules[i]; |
| 432 | if (!is_valid_reg_rule(reg_rule)) |
| 433 | return false; |
| 434 | } |
| 435 | |
| 436 | return true; |
| 437 | } |
| 438 | |
Luis R. Rodriguez | 038659e | 2009-05-02 00:37:17 -0400 | [diff] [blame] | 439 | static bool reg_does_bw_fit(const struct ieee80211_freq_range *freq_range, |
| 440 | u32 center_freq_khz, |
| 441 | u32 bw_khz) |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 442 | { |
Luis R. Rodriguez | 038659e | 2009-05-02 00:37:17 -0400 | [diff] [blame] | 443 | u32 start_freq_khz, end_freq_khz; |
| 444 | |
| 445 | start_freq_khz = center_freq_khz - (bw_khz/2); |
| 446 | end_freq_khz = center_freq_khz + (bw_khz/2); |
| 447 | |
| 448 | if (start_freq_khz >= freq_range->start_freq_khz && |
| 449 | end_freq_khz <= freq_range->end_freq_khz) |
| 450 | return true; |
| 451 | |
| 452 | return false; |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 453 | } |
| 454 | |
Luis R. Rodriguez | 0c7dc45 | 2009-01-07 17:43:36 -0800 | [diff] [blame] | 455 | /** |
| 456 | * freq_in_rule_band - tells us if a frequency is in a frequency band |
| 457 | * @freq_range: frequency rule we want to query |
| 458 | * @freq_khz: frequency we are inquiring about |
| 459 | * |
| 460 | * This lets us know if a specific frequency rule is or is not relevant to |
| 461 | * a specific frequency's band. Bands are device specific and artificial |
| 462 | * definitions (the "2.4 GHz band" and the "5 GHz band"), however it is |
| 463 | * safe for now to assume that a frequency rule should not be part of a |
| 464 | * frequency's band if the start freq or end freq are off by more than 2 GHz. |
| 465 | * This resolution can be lowered and should be considered as we add |
| 466 | * regulatory rule support for other "bands". |
| 467 | **/ |
| 468 | static bool freq_in_rule_band(const struct ieee80211_freq_range *freq_range, |
| 469 | u32 freq_khz) |
| 470 | { |
| 471 | #define ONE_GHZ_IN_KHZ 1000000 |
| 472 | if (abs(freq_khz - freq_range->start_freq_khz) <= (2 * ONE_GHZ_IN_KHZ)) |
| 473 | return true; |
| 474 | if (abs(freq_khz - freq_range->end_freq_khz) <= (2 * ONE_GHZ_IN_KHZ)) |
| 475 | return true; |
| 476 | return false; |
| 477 | #undef ONE_GHZ_IN_KHZ |
| 478 | } |
| 479 | |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 480 | /* |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 481 | * Helper for regdom_intersect(), this does the real |
| 482 | * mathematical intersection fun |
| 483 | */ |
Luis R. Rodriguez | 9c96477 | 2008-10-30 13:33:53 -0700 | [diff] [blame] | 484 | static int reg_rules_intersect( |
| 485 | const struct ieee80211_reg_rule *rule1, |
| 486 | const struct ieee80211_reg_rule *rule2, |
| 487 | struct ieee80211_reg_rule *intersected_rule) |
| 488 | { |
| 489 | const struct ieee80211_freq_range *freq_range1, *freq_range2; |
| 490 | struct ieee80211_freq_range *freq_range; |
| 491 | const struct ieee80211_power_rule *power_rule1, *power_rule2; |
| 492 | struct ieee80211_power_rule *power_rule; |
| 493 | u32 freq_diff; |
| 494 | |
| 495 | freq_range1 = &rule1->freq_range; |
| 496 | freq_range2 = &rule2->freq_range; |
| 497 | freq_range = &intersected_rule->freq_range; |
| 498 | |
| 499 | power_rule1 = &rule1->power_rule; |
| 500 | power_rule2 = &rule2->power_rule; |
| 501 | power_rule = &intersected_rule->power_rule; |
| 502 | |
| 503 | freq_range->start_freq_khz = max(freq_range1->start_freq_khz, |
| 504 | freq_range2->start_freq_khz); |
| 505 | freq_range->end_freq_khz = min(freq_range1->end_freq_khz, |
| 506 | freq_range2->end_freq_khz); |
| 507 | freq_range->max_bandwidth_khz = min(freq_range1->max_bandwidth_khz, |
| 508 | freq_range2->max_bandwidth_khz); |
| 509 | |
| 510 | freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz; |
| 511 | if (freq_range->max_bandwidth_khz > freq_diff) |
| 512 | freq_range->max_bandwidth_khz = freq_diff; |
| 513 | |
| 514 | power_rule->max_eirp = min(power_rule1->max_eirp, |
| 515 | power_rule2->max_eirp); |
| 516 | power_rule->max_antenna_gain = min(power_rule1->max_antenna_gain, |
| 517 | power_rule2->max_antenna_gain); |
| 518 | |
| 519 | intersected_rule->flags = (rule1->flags | rule2->flags); |
| 520 | |
| 521 | if (!is_valid_reg_rule(intersected_rule)) |
| 522 | return -EINVAL; |
| 523 | |
| 524 | return 0; |
| 525 | } |
| 526 | |
| 527 | /** |
| 528 | * regdom_intersect - do the intersection between two regulatory domains |
| 529 | * @rd1: first regulatory domain |
| 530 | * @rd2: second regulatory domain |
| 531 | * |
| 532 | * Use this function to get the intersection between two regulatory domains. |
| 533 | * Once completed we will mark the alpha2 for the rd as intersected, "98", |
| 534 | * as no one single alpha2 can represent this regulatory domain. |
| 535 | * |
| 536 | * Returns a pointer to the regulatory domain structure which will hold the |
| 537 | * resulting intersection of rules between rd1 and rd2. We will |
| 538 | * kzalloc() this structure for you. |
| 539 | */ |
| 540 | static struct ieee80211_regdomain *regdom_intersect( |
| 541 | const struct ieee80211_regdomain *rd1, |
| 542 | const struct ieee80211_regdomain *rd2) |
| 543 | { |
| 544 | int r, size_of_regd; |
| 545 | unsigned int x, y; |
| 546 | unsigned int num_rules = 0, rule_idx = 0; |
| 547 | const struct ieee80211_reg_rule *rule1, *rule2; |
| 548 | struct ieee80211_reg_rule *intersected_rule; |
| 549 | struct ieee80211_regdomain *rd; |
| 550 | /* This is just a dummy holder to help us count */ |
| 551 | struct ieee80211_reg_rule irule; |
| 552 | |
| 553 | /* Uses the stack temporarily for counter arithmetic */ |
| 554 | intersected_rule = &irule; |
| 555 | |
| 556 | memset(intersected_rule, 0, sizeof(struct ieee80211_reg_rule)); |
| 557 | |
| 558 | if (!rd1 || !rd2) |
| 559 | return NULL; |
| 560 | |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 561 | /* |
| 562 | * First we get a count of the rules we'll need, then we actually |
Luis R. Rodriguez | 9c96477 | 2008-10-30 13:33:53 -0700 | [diff] [blame] | 563 | * build them. This is to so we can malloc() and free() a |
| 564 | * regdomain once. The reason we use reg_rules_intersect() here |
| 565 | * is it will return -EINVAL if the rule computed makes no sense. |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 566 | * All rules that do check out OK are valid. |
| 567 | */ |
Luis R. Rodriguez | 9c96477 | 2008-10-30 13:33:53 -0700 | [diff] [blame] | 568 | |
| 569 | for (x = 0; x < rd1->n_reg_rules; x++) { |
| 570 | rule1 = &rd1->reg_rules[x]; |
| 571 | for (y = 0; y < rd2->n_reg_rules; y++) { |
| 572 | rule2 = &rd2->reg_rules[y]; |
| 573 | if (!reg_rules_intersect(rule1, rule2, |
| 574 | intersected_rule)) |
| 575 | num_rules++; |
| 576 | memset(intersected_rule, 0, |
| 577 | sizeof(struct ieee80211_reg_rule)); |
| 578 | } |
| 579 | } |
| 580 | |
| 581 | if (!num_rules) |
| 582 | return NULL; |
| 583 | |
| 584 | size_of_regd = sizeof(struct ieee80211_regdomain) + |
| 585 | ((num_rules + 1) * sizeof(struct ieee80211_reg_rule)); |
| 586 | |
| 587 | rd = kzalloc(size_of_regd, GFP_KERNEL); |
| 588 | if (!rd) |
| 589 | return NULL; |
| 590 | |
| 591 | for (x = 0; x < rd1->n_reg_rules; x++) { |
| 592 | rule1 = &rd1->reg_rules[x]; |
| 593 | for (y = 0; y < rd2->n_reg_rules; y++) { |
| 594 | rule2 = &rd2->reg_rules[y]; |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 595 | /* |
| 596 | * This time around instead of using the stack lets |
Luis R. Rodriguez | 9c96477 | 2008-10-30 13:33:53 -0700 | [diff] [blame] | 597 | * write to the target rule directly saving ourselves |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 598 | * a memcpy() |
| 599 | */ |
Luis R. Rodriguez | 9c96477 | 2008-10-30 13:33:53 -0700 | [diff] [blame] | 600 | intersected_rule = &rd->reg_rules[rule_idx]; |
| 601 | r = reg_rules_intersect(rule1, rule2, |
| 602 | intersected_rule); |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 603 | /* |
| 604 | * No need to memset here the intersected rule here as |
| 605 | * we're not using the stack anymore |
| 606 | */ |
Luis R. Rodriguez | 9c96477 | 2008-10-30 13:33:53 -0700 | [diff] [blame] | 607 | if (r) |
| 608 | continue; |
| 609 | rule_idx++; |
| 610 | } |
| 611 | } |
| 612 | |
| 613 | if (rule_idx != num_rules) { |
| 614 | kfree(rd); |
| 615 | return NULL; |
| 616 | } |
| 617 | |
| 618 | rd->n_reg_rules = num_rules; |
| 619 | rd->alpha2[0] = '9'; |
| 620 | rd->alpha2[1] = '8'; |
| 621 | |
| 622 | return rd; |
| 623 | } |
| 624 | |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 625 | /* |
| 626 | * XXX: add support for the rest of enum nl80211_reg_rule_flags, we may |
| 627 | * want to just have the channel structure use these |
| 628 | */ |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 629 | static u32 map_regdom_flags(u32 rd_flags) |
| 630 | { |
| 631 | u32 channel_flags = 0; |
| 632 | if (rd_flags & NL80211_RRF_PASSIVE_SCAN) |
| 633 | channel_flags |= IEEE80211_CHAN_PASSIVE_SCAN; |
| 634 | if (rd_flags & NL80211_RRF_NO_IBSS) |
| 635 | channel_flags |= IEEE80211_CHAN_NO_IBSS; |
| 636 | if (rd_flags & NL80211_RRF_DFS) |
| 637 | channel_flags |= IEEE80211_CHAN_RADAR; |
| 638 | return channel_flags; |
| 639 | } |
| 640 | |
Luis R. Rodriguez | 1fa25e4 | 2009-01-22 15:05:44 -0800 | [diff] [blame] | 641 | static int freq_reg_info_regd(struct wiphy *wiphy, |
| 642 | u32 center_freq, |
Luis R. Rodriguez | 038659e | 2009-05-02 00:37:17 -0400 | [diff] [blame] | 643 | u32 desired_bw_khz, |
Luis R. Rodriguez | 1fa25e4 | 2009-01-22 15:05:44 -0800 | [diff] [blame] | 644 | const struct ieee80211_reg_rule **reg_rule, |
| 645 | const struct ieee80211_regdomain *custom_regd) |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 646 | { |
| 647 | int i; |
Luis R. Rodriguez | 0c7dc45 | 2009-01-07 17:43:36 -0800 | [diff] [blame] | 648 | bool band_rule_found = false; |
Luis R. Rodriguez | 3e0c3ff | 2009-01-07 17:43:34 -0800 | [diff] [blame] | 649 | const struct ieee80211_regdomain *regd; |
Luis R. Rodriguez | 038659e | 2009-05-02 00:37:17 -0400 | [diff] [blame] | 650 | bool bw_fits = false; |
| 651 | |
| 652 | if (!desired_bw_khz) |
| 653 | desired_bw_khz = MHZ_TO_KHZ(20); |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 654 | |
Luis R. Rodriguez | 1fa25e4 | 2009-01-22 15:05:44 -0800 | [diff] [blame] | 655 | regd = custom_regd ? custom_regd : cfg80211_regdomain; |
Luis R. Rodriguez | 3e0c3ff | 2009-01-07 17:43:34 -0800 | [diff] [blame] | 656 | |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 657 | /* |
| 658 | * Follow the driver's regulatory domain, if present, unless a country |
| 659 | * IE has been processed or a user wants to help complaince further |
| 660 | */ |
Luis R. Rodriguez | 2784fe9 | 2010-12-15 19:24:11 -0800 | [diff] [blame] | 661 | if (!custom_regd && |
| 662 | last_request->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && |
Luis R. Rodriguez | 7db90f4 | 2009-03-09 22:07:41 -0400 | [diff] [blame] | 663 | last_request->initiator != NL80211_REGDOM_SET_BY_USER && |
Luis R. Rodriguez | 3e0c3ff | 2009-01-07 17:43:34 -0800 | [diff] [blame] | 664 | wiphy->regd) |
| 665 | regd = wiphy->regd; |
| 666 | |
| 667 | if (!regd) |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 668 | return -EINVAL; |
| 669 | |
Luis R. Rodriguez | 3e0c3ff | 2009-01-07 17:43:34 -0800 | [diff] [blame] | 670 | for (i = 0; i < regd->n_reg_rules; i++) { |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 671 | const struct ieee80211_reg_rule *rr; |
| 672 | const struct ieee80211_freq_range *fr = NULL; |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 673 | |
Luis R. Rodriguez | 3e0c3ff | 2009-01-07 17:43:34 -0800 | [diff] [blame] | 674 | rr = ®d->reg_rules[i]; |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 675 | fr = &rr->freq_range; |
Luis R. Rodriguez | 0c7dc45 | 2009-01-07 17:43:36 -0800 | [diff] [blame] | 676 | |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 677 | /* |
| 678 | * We only need to know if one frequency rule was |
Luis R. Rodriguez | 0c7dc45 | 2009-01-07 17:43:36 -0800 | [diff] [blame] | 679 | * was in center_freq's band, that's enough, so lets |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 680 | * not overwrite it once found |
| 681 | */ |
Luis R. Rodriguez | 0c7dc45 | 2009-01-07 17:43:36 -0800 | [diff] [blame] | 682 | if (!band_rule_found) |
| 683 | band_rule_found = freq_in_rule_band(fr, center_freq); |
| 684 | |
Luis R. Rodriguez | 038659e | 2009-05-02 00:37:17 -0400 | [diff] [blame] | 685 | bw_fits = reg_does_bw_fit(fr, |
| 686 | center_freq, |
| 687 | desired_bw_khz); |
Luis R. Rodriguez | 0c7dc45 | 2009-01-07 17:43:36 -0800 | [diff] [blame] | 688 | |
Luis R. Rodriguez | 038659e | 2009-05-02 00:37:17 -0400 | [diff] [blame] | 689 | if (band_rule_found && bw_fits) { |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 690 | *reg_rule = rr; |
Luis R. Rodriguez | 038659e | 2009-05-02 00:37:17 -0400 | [diff] [blame] | 691 | return 0; |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 692 | } |
| 693 | } |
| 694 | |
Luis R. Rodriguez | 0c7dc45 | 2009-01-07 17:43:36 -0800 | [diff] [blame] | 695 | if (!band_rule_found) |
| 696 | return -ERANGE; |
| 697 | |
Luis R. Rodriguez | 038659e | 2009-05-02 00:37:17 -0400 | [diff] [blame] | 698 | return -EINVAL; |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 699 | } |
| 700 | |
Luis R. Rodriguez | 038659e | 2009-05-02 00:37:17 -0400 | [diff] [blame] | 701 | int freq_reg_info(struct wiphy *wiphy, |
| 702 | u32 center_freq, |
| 703 | u32 desired_bw_khz, |
| 704 | const struct ieee80211_reg_rule **reg_rule) |
Luis R. Rodriguez | 1fa25e4 | 2009-01-22 15:05:44 -0800 | [diff] [blame] | 705 | { |
Luis R. Rodriguez | ac46d48 | 2009-05-01 18:44:50 -0400 | [diff] [blame] | 706 | assert_cfg80211_lock(); |
Luis R. Rodriguez | 038659e | 2009-05-02 00:37:17 -0400 | [diff] [blame] | 707 | return freq_reg_info_regd(wiphy, |
| 708 | center_freq, |
| 709 | desired_bw_khz, |
| 710 | reg_rule, |
| 711 | NULL); |
Luis R. Rodriguez | 1fa25e4 | 2009-01-22 15:05:44 -0800 | [diff] [blame] | 712 | } |
John W. Linville | 4f366c5 | 2010-07-15 14:57:33 -0400 | [diff] [blame] | 713 | EXPORT_SYMBOL(freq_reg_info); |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 714 | |
Luis R. Rodriguez | 926a0a0 | 2010-10-21 19:17:03 +0530 | [diff] [blame] | 715 | #ifdef CONFIG_CFG80211_REG_DEBUG |
| 716 | static const char *reg_initiator_name(enum nl80211_reg_initiator initiator) |
| 717 | { |
| 718 | switch (initiator) { |
| 719 | case NL80211_REGDOM_SET_BY_CORE: |
| 720 | return "Set by core"; |
| 721 | case NL80211_REGDOM_SET_BY_USER: |
| 722 | return "Set by user"; |
| 723 | case NL80211_REGDOM_SET_BY_DRIVER: |
| 724 | return "Set by driver"; |
| 725 | case NL80211_REGDOM_SET_BY_COUNTRY_IE: |
| 726 | return "Set by country IE"; |
| 727 | default: |
| 728 | WARN_ON(1); |
| 729 | return "Set by bug"; |
| 730 | } |
| 731 | } |
Luis R. Rodriguez | e702d3c | 2010-10-21 19:17:04 +0530 | [diff] [blame] | 732 | |
| 733 | static void chan_reg_rule_print_dbg(struct ieee80211_channel *chan, |
| 734 | u32 desired_bw_khz, |
| 735 | const struct ieee80211_reg_rule *reg_rule) |
| 736 | { |
| 737 | const struct ieee80211_power_rule *power_rule; |
| 738 | const struct ieee80211_freq_range *freq_range; |
| 739 | char max_antenna_gain[32]; |
| 740 | |
| 741 | power_rule = ®_rule->power_rule; |
| 742 | freq_range = ®_rule->freq_range; |
| 743 | |
| 744 | if (!power_rule->max_antenna_gain) |
| 745 | snprintf(max_antenna_gain, 32, "N/A"); |
| 746 | else |
| 747 | snprintf(max_antenna_gain, 32, "%d", power_rule->max_antenna_gain); |
| 748 | |
Luis R. Rodriguez | d91e41b | 2010-10-20 10:18:59 -0700 | [diff] [blame] | 749 | REG_DBG_PRINT("Updating information on frequency %d MHz " |
Bob Copeland | ff039c6 | 2010-12-29 17:09:02 -0500 | [diff] [blame] | 750 | "for a %d MHz width channel with regulatory rule:\n", |
Luis R. Rodriguez | e702d3c | 2010-10-21 19:17:04 +0530 | [diff] [blame] | 751 | chan->center_freq, |
| 752 | KHZ_TO_MHZ(desired_bw_khz)); |
| 753 | |
Pavel Roskin | 56e6786 | 2011-09-01 11:54:12 -0400 | [diff] [blame] | 754 | REG_DBG_PRINT("%d KHz - %d KHz @ %d KHz), (%s mBi, %d mBm)\n", |
Luis R. Rodriguez | e702d3c | 2010-10-21 19:17:04 +0530 | [diff] [blame] | 755 | freq_range->start_freq_khz, |
| 756 | freq_range->end_freq_khz, |
Pavel Roskin | 56e6786 | 2011-09-01 11:54:12 -0400 | [diff] [blame] | 757 | freq_range->max_bandwidth_khz, |
Luis R. Rodriguez | e702d3c | 2010-10-21 19:17:04 +0530 | [diff] [blame] | 758 | max_antenna_gain, |
| 759 | power_rule->max_eirp); |
| 760 | } |
| 761 | #else |
| 762 | static void chan_reg_rule_print_dbg(struct ieee80211_channel *chan, |
| 763 | u32 desired_bw_khz, |
| 764 | const struct ieee80211_reg_rule *reg_rule) |
| 765 | { |
| 766 | return; |
| 767 | } |
Luis R. Rodriguez | 926a0a0 | 2010-10-21 19:17:03 +0530 | [diff] [blame] | 768 | #endif |
| 769 | |
Luis R. Rodriguez | 038659e | 2009-05-02 00:37:17 -0400 | [diff] [blame] | 770 | /* |
| 771 | * Note that right now we assume the desired channel bandwidth |
| 772 | * is always 20 MHz for each individual channel (HT40 uses 20 MHz |
| 773 | * per channel, the primary and the extension channel). To support |
| 774 | * smaller custom bandwidths such as 5 MHz or 10 MHz we'll need a |
| 775 | * new ieee80211_channel.target_bw and re run the regulatory check |
| 776 | * on the wiphy with the target_bw specified. Then we can simply use |
| 777 | * that below for the desired_bw_khz below. |
| 778 | */ |
Luis R. Rodriguez | 7ca43d0 | 2010-10-20 10:18:53 -0700 | [diff] [blame] | 779 | static void handle_channel(struct wiphy *wiphy, |
| 780 | enum nl80211_reg_initiator initiator, |
| 781 | enum ieee80211_band band, |
Luis R. Rodriguez | a92a3ce | 2009-01-07 17:43:33 -0800 | [diff] [blame] | 782 | unsigned int chan_idx) |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 783 | { |
| 784 | int r; |
Luis R. Rodriguez | 038659e | 2009-05-02 00:37:17 -0400 | [diff] [blame] | 785 | u32 flags, bw_flags = 0; |
| 786 | u32 desired_bw_khz = MHZ_TO_KHZ(20); |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 787 | const struct ieee80211_reg_rule *reg_rule = NULL; |
| 788 | const struct ieee80211_power_rule *power_rule = NULL; |
Luis R. Rodriguez | 038659e | 2009-05-02 00:37:17 -0400 | [diff] [blame] | 789 | const struct ieee80211_freq_range *freq_range = NULL; |
Luis R. Rodriguez | a92a3ce | 2009-01-07 17:43:33 -0800 | [diff] [blame] | 790 | struct ieee80211_supported_band *sband; |
| 791 | struct ieee80211_channel *chan; |
Luis R. Rodriguez | fe33eb3 | 2009-02-21 00:04:30 -0500 | [diff] [blame] | 792 | struct wiphy *request_wiphy = NULL; |
Luis R. Rodriguez | a92a3ce | 2009-01-07 17:43:33 -0800 | [diff] [blame] | 793 | |
Luis R. Rodriguez | 761cf7e | 2009-02-21 00:04:25 -0500 | [diff] [blame] | 794 | assert_cfg80211_lock(); |
| 795 | |
Luis R. Rodriguez | 806a9e3 | 2009-02-21 00:04:26 -0500 | [diff] [blame] | 796 | request_wiphy = wiphy_idx_to_wiphy(last_request->wiphy_idx); |
| 797 | |
Luis R. Rodriguez | a92a3ce | 2009-01-07 17:43:33 -0800 | [diff] [blame] | 798 | sband = wiphy->bands[band]; |
| 799 | BUG_ON(chan_idx >= sband->n_channels); |
| 800 | chan = &sband->channels[chan_idx]; |
| 801 | |
| 802 | flags = chan->orig_flags; |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 803 | |
Luis R. Rodriguez | 038659e | 2009-05-02 00:37:17 -0400 | [diff] [blame] | 804 | r = freq_reg_info(wiphy, |
| 805 | MHZ_TO_KHZ(chan->center_freq), |
| 806 | desired_bw_khz, |
| 807 | ®_rule); |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 808 | |
Luis R. Rodriguez | ca4ffe8 | 2010-10-20 10:18:55 -0700 | [diff] [blame] | 809 | if (r) { |
| 810 | /* |
| 811 | * We will disable all channels that do not match our |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 812 | * received regulatory rule unless the hint is coming |
Luis R. Rodriguez | ca4ffe8 | 2010-10-20 10:18:55 -0700 | [diff] [blame] | 813 | * from a Country IE and the Country IE had no information |
| 814 | * about a band. The IEEE 802.11 spec allows for an AP |
| 815 | * to send only a subset of the regulatory rules allowed, |
| 816 | * so an AP in the US that only supports 2.4 GHz may only send |
| 817 | * a country IE with information for the 2.4 GHz band |
| 818 | * while 5 GHz is still supported. |
| 819 | */ |
| 820 | if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE && |
| 821 | r == -ERANGE) |
| 822 | return; |
| 823 | |
Luis R. Rodriguez | d91e41b | 2010-10-20 10:18:59 -0700 | [diff] [blame] | 824 | REG_DBG_PRINT("Disabling freq %d MHz\n", chan->center_freq); |
Luis R. Rodriguez | ca4ffe8 | 2010-10-20 10:18:55 -0700 | [diff] [blame] | 825 | chan->flags = IEEE80211_CHAN_DISABLED; |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 826 | return; |
Luis R. Rodriguez | ca4ffe8 | 2010-10-20 10:18:55 -0700 | [diff] [blame] | 827 | } |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 828 | |
Luis R. Rodriguez | e702d3c | 2010-10-21 19:17:04 +0530 | [diff] [blame] | 829 | chan_reg_rule_print_dbg(chan, desired_bw_khz, reg_rule); |
| 830 | |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 831 | power_rule = ®_rule->power_rule; |
Luis R. Rodriguez | 038659e | 2009-05-02 00:37:17 -0400 | [diff] [blame] | 832 | freq_range = ®_rule->freq_range; |
| 833 | |
| 834 | if (freq_range->max_bandwidth_khz < MHZ_TO_KHZ(40)) |
| 835 | bw_flags = IEEE80211_CHAN_NO_HT40; |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 836 | |
Luis R. Rodriguez | 7db90f4 | 2009-03-09 22:07:41 -0400 | [diff] [blame] | 837 | if (last_request->initiator == NL80211_REGDOM_SET_BY_DRIVER && |
Luis R. Rodriguez | 806a9e3 | 2009-02-21 00:04:26 -0500 | [diff] [blame] | 838 | request_wiphy && request_wiphy == wiphy && |
Johannes Berg | 5be83de | 2009-11-19 00:56:28 +0100 | [diff] [blame] | 839 | request_wiphy->flags & WIPHY_FLAG_STRICT_REGULATORY) { |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 840 | /* |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 841 | * This guarantees the driver's requested regulatory domain |
Luis R. Rodriguez | f976376 | 2009-01-22 15:05:52 -0800 | [diff] [blame] | 842 | * will always be used as a base for further regulatory |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 843 | * settings |
| 844 | */ |
Luis R. Rodriguez | f976376 | 2009-01-22 15:05:52 -0800 | [diff] [blame] | 845 | chan->flags = chan->orig_flags = |
Luis R. Rodriguez | 038659e | 2009-05-02 00:37:17 -0400 | [diff] [blame] | 846 | map_regdom_flags(reg_rule->flags) | bw_flags; |
Luis R. Rodriguez | f976376 | 2009-01-22 15:05:52 -0800 | [diff] [blame] | 847 | chan->max_antenna_gain = chan->orig_mag = |
| 848 | (int) MBI_TO_DBI(power_rule->max_antenna_gain); |
Luis R. Rodriguez | f976376 | 2009-01-22 15:05:52 -0800 | [diff] [blame] | 849 | chan->max_power = chan->orig_mpwr = |
| 850 | (int) MBM_TO_DBM(power_rule->max_eirp); |
| 851 | return; |
| 852 | } |
| 853 | |
Rajkumar Manoharan | aa3d7ee | 2011-09-14 14:28:17 +0530 | [diff] [blame] | 854 | chan->beacon_found = false; |
Luis R. Rodriguez | 038659e | 2009-05-02 00:37:17 -0400 | [diff] [blame] | 855 | chan->flags = flags | bw_flags | map_regdom_flags(reg_rule->flags); |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 856 | chan->max_antenna_gain = min(chan->orig_mag, |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 857 | (int) MBI_TO_DBI(power_rule->max_antenna_gain)); |
John W. Linville | 253898c | 2008-04-03 15:32:54 -0400 | [diff] [blame] | 858 | if (chan->orig_mpwr) |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 859 | chan->max_power = min(chan->orig_mpwr, |
| 860 | (int) MBM_TO_DBM(power_rule->max_eirp)); |
John W. Linville | 253898c | 2008-04-03 15:32:54 -0400 | [diff] [blame] | 861 | else |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 862 | chan->max_power = (int) MBM_TO_DBM(power_rule->max_eirp); |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 863 | } |
| 864 | |
Luis R. Rodriguez | 7ca43d0 | 2010-10-20 10:18:53 -0700 | [diff] [blame] | 865 | static void handle_band(struct wiphy *wiphy, |
| 866 | enum ieee80211_band band, |
| 867 | enum nl80211_reg_initiator initiator) |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 868 | { |
Luis R. Rodriguez | a92a3ce | 2009-01-07 17:43:33 -0800 | [diff] [blame] | 869 | unsigned int i; |
| 870 | struct ieee80211_supported_band *sband; |
| 871 | |
| 872 | BUG_ON(!wiphy->bands[band]); |
| 873 | sband = wiphy->bands[band]; |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 874 | |
| 875 | for (i = 0; i < sband->n_channels; i++) |
Luis R. Rodriguez | 7ca43d0 | 2010-10-20 10:18:53 -0700 | [diff] [blame] | 876 | handle_channel(wiphy, initiator, band, i); |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 877 | } |
| 878 | |
Luis R. Rodriguez | 7db90f4 | 2009-03-09 22:07:41 -0400 | [diff] [blame] | 879 | static bool ignore_reg_update(struct wiphy *wiphy, |
| 880 | enum nl80211_reg_initiator initiator) |
Luis R. Rodriguez | 14b9815 | 2008-11-12 14:22:03 -0800 | [diff] [blame] | 881 | { |
Luis R. Rodriguez | 926a0a0 | 2010-10-21 19:17:03 +0530 | [diff] [blame] | 882 | if (!last_request) { |
Luis R. Rodriguez | d91e41b | 2010-10-20 10:18:59 -0700 | [diff] [blame] | 883 | REG_DBG_PRINT("Ignoring regulatory request %s since " |
Luis R. Rodriguez | 926a0a0 | 2010-10-21 19:17:03 +0530 | [diff] [blame] | 884 | "last_request is not set\n", |
| 885 | reg_initiator_name(initiator)); |
Luis R. Rodriguez | 14b9815 | 2008-11-12 14:22:03 -0800 | [diff] [blame] | 886 | return true; |
Luis R. Rodriguez | 926a0a0 | 2010-10-21 19:17:03 +0530 | [diff] [blame] | 887 | } |
| 888 | |
Luis R. Rodriguez | 7db90f4 | 2009-03-09 22:07:41 -0400 | [diff] [blame] | 889 | if (initiator == NL80211_REGDOM_SET_BY_CORE && |
Luis R. Rodriguez | 926a0a0 | 2010-10-21 19:17:03 +0530 | [diff] [blame] | 890 | wiphy->flags & WIPHY_FLAG_CUSTOM_REGULATORY) { |
Luis R. Rodriguez | d91e41b | 2010-10-20 10:18:59 -0700 | [diff] [blame] | 891 | REG_DBG_PRINT("Ignoring regulatory request %s " |
Luis R. Rodriguez | 926a0a0 | 2010-10-21 19:17:03 +0530 | [diff] [blame] | 892 | "since the driver uses its own custom " |
Joe Perches | 12c5ffb | 2011-07-29 14:51:25 -0700 | [diff] [blame] | 893 | "regulatory domain\n", |
Luis R. Rodriguez | 926a0a0 | 2010-10-21 19:17:03 +0530 | [diff] [blame] | 894 | reg_initiator_name(initiator)); |
Luis R. Rodriguez | 14b9815 | 2008-11-12 14:22:03 -0800 | [diff] [blame] | 895 | return true; |
Luis R. Rodriguez | 926a0a0 | 2010-10-21 19:17:03 +0530 | [diff] [blame] | 896 | } |
| 897 | |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 898 | /* |
| 899 | * wiphy->regd will be set once the device has its own |
| 900 | * desired regulatory domain set |
| 901 | */ |
Johannes Berg | 5be83de | 2009-11-19 00:56:28 +0100 | [diff] [blame] | 902 | if (wiphy->flags & WIPHY_FLAG_STRICT_REGULATORY && !wiphy->regd && |
Luis R. Rodriguez | 749b527 | 2010-10-20 10:18:54 -0700 | [diff] [blame] | 903 | initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && |
Luis R. Rodriguez | 926a0a0 | 2010-10-21 19:17:03 +0530 | [diff] [blame] | 904 | !is_world_regdom(last_request->alpha2)) { |
Luis R. Rodriguez | d91e41b | 2010-10-20 10:18:59 -0700 | [diff] [blame] | 905 | REG_DBG_PRINT("Ignoring regulatory request %s " |
Mihai Moldovan | 5bc91db | 2011-07-25 11:18:58 +0200 | [diff] [blame] | 906 | "since the driver requires its own regulatory " |
Joe Perches | 12c5ffb | 2011-07-29 14:51:25 -0700 | [diff] [blame] | 907 | "domain to be set first\n", |
Luis R. Rodriguez | 926a0a0 | 2010-10-21 19:17:03 +0530 | [diff] [blame] | 908 | reg_initiator_name(initiator)); |
Luis R. Rodriguez | 14b9815 | 2008-11-12 14:22:03 -0800 | [diff] [blame] | 909 | return true; |
Luis R. Rodriguez | 926a0a0 | 2010-10-21 19:17:03 +0530 | [diff] [blame] | 910 | } |
| 911 | |
Luis R. Rodriguez | 14b9815 | 2008-11-12 14:22:03 -0800 | [diff] [blame] | 912 | return false; |
| 913 | } |
| 914 | |
Luis R. Rodriguez | e38f8a7 | 2009-02-21 00:20:39 -0500 | [diff] [blame] | 915 | static void handle_reg_beacon(struct wiphy *wiphy, |
| 916 | unsigned int chan_idx, |
| 917 | struct reg_beacon *reg_beacon) |
| 918 | { |
Luis R. Rodriguez | e38f8a7 | 2009-02-21 00:20:39 -0500 | [diff] [blame] | 919 | struct ieee80211_supported_band *sband; |
| 920 | struct ieee80211_channel *chan; |
Luis R. Rodriguez | 6bad876 | 2009-04-02 14:08:09 -0400 | [diff] [blame] | 921 | bool channel_changed = false; |
| 922 | struct ieee80211_channel chan_before; |
Luis R. Rodriguez | e38f8a7 | 2009-02-21 00:20:39 -0500 | [diff] [blame] | 923 | |
| 924 | assert_cfg80211_lock(); |
| 925 | |
| 926 | sband = wiphy->bands[reg_beacon->chan.band]; |
| 927 | chan = &sband->channels[chan_idx]; |
| 928 | |
| 929 | if (likely(chan->center_freq != reg_beacon->chan.center_freq)) |
| 930 | return; |
| 931 | |
Luis R. Rodriguez | 6bad876 | 2009-04-02 14:08:09 -0400 | [diff] [blame] | 932 | if (chan->beacon_found) |
| 933 | return; |
| 934 | |
| 935 | chan->beacon_found = true; |
| 936 | |
Johannes Berg | 5be83de | 2009-11-19 00:56:28 +0100 | [diff] [blame] | 937 | if (wiphy->flags & WIPHY_FLAG_DISABLE_BEACON_HINTS) |
Luis R. Rodriguez | 3718424 | 2009-07-30 17:43:48 -0700 | [diff] [blame] | 938 | return; |
| 939 | |
Luis R. Rodriguez | 6bad876 | 2009-04-02 14:08:09 -0400 | [diff] [blame] | 940 | chan_before.center_freq = chan->center_freq; |
| 941 | chan_before.flags = chan->flags; |
| 942 | |
Luis R. Rodriguez | 3718424 | 2009-07-30 17:43:48 -0700 | [diff] [blame] | 943 | if (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN) { |
Luis R. Rodriguez | e38f8a7 | 2009-02-21 00:20:39 -0500 | [diff] [blame] | 944 | chan->flags &= ~IEEE80211_CHAN_PASSIVE_SCAN; |
Luis R. Rodriguez | 6bad876 | 2009-04-02 14:08:09 -0400 | [diff] [blame] | 945 | channel_changed = true; |
Luis R. Rodriguez | e38f8a7 | 2009-02-21 00:20:39 -0500 | [diff] [blame] | 946 | } |
| 947 | |
Luis R. Rodriguez | 3718424 | 2009-07-30 17:43:48 -0700 | [diff] [blame] | 948 | if (chan->flags & IEEE80211_CHAN_NO_IBSS) { |
Luis R. Rodriguez | e38f8a7 | 2009-02-21 00:20:39 -0500 | [diff] [blame] | 949 | chan->flags &= ~IEEE80211_CHAN_NO_IBSS; |
Luis R. Rodriguez | 6bad876 | 2009-04-02 14:08:09 -0400 | [diff] [blame] | 950 | channel_changed = true; |
Luis R. Rodriguez | e38f8a7 | 2009-02-21 00:20:39 -0500 | [diff] [blame] | 951 | } |
| 952 | |
Luis R. Rodriguez | 6bad876 | 2009-04-02 14:08:09 -0400 | [diff] [blame] | 953 | if (channel_changed) |
| 954 | nl80211_send_beacon_hint_event(wiphy, &chan_before, chan); |
Luis R. Rodriguez | e38f8a7 | 2009-02-21 00:20:39 -0500 | [diff] [blame] | 955 | } |
| 956 | |
| 957 | /* |
| 958 | * Called when a scan on a wiphy finds a beacon on |
| 959 | * new channel |
| 960 | */ |
| 961 | static void wiphy_update_new_beacon(struct wiphy *wiphy, |
| 962 | struct reg_beacon *reg_beacon) |
| 963 | { |
| 964 | unsigned int i; |
| 965 | struct ieee80211_supported_band *sband; |
| 966 | |
| 967 | assert_cfg80211_lock(); |
| 968 | |
| 969 | if (!wiphy->bands[reg_beacon->chan.band]) |
| 970 | return; |
| 971 | |
| 972 | sband = wiphy->bands[reg_beacon->chan.band]; |
| 973 | |
| 974 | for (i = 0; i < sband->n_channels; i++) |
| 975 | handle_reg_beacon(wiphy, i, reg_beacon); |
| 976 | } |
| 977 | |
| 978 | /* |
| 979 | * Called upon reg changes or a new wiphy is added |
| 980 | */ |
| 981 | static void wiphy_update_beacon_reg(struct wiphy *wiphy) |
| 982 | { |
| 983 | unsigned int i; |
| 984 | struct ieee80211_supported_band *sband; |
| 985 | struct reg_beacon *reg_beacon; |
| 986 | |
| 987 | assert_cfg80211_lock(); |
| 988 | |
| 989 | if (list_empty(®_beacon_list)) |
| 990 | return; |
| 991 | |
| 992 | list_for_each_entry(reg_beacon, ®_beacon_list, list) { |
| 993 | if (!wiphy->bands[reg_beacon->chan.band]) |
| 994 | continue; |
| 995 | sband = wiphy->bands[reg_beacon->chan.band]; |
| 996 | for (i = 0; i < sband->n_channels; i++) |
| 997 | handle_reg_beacon(wiphy, i, reg_beacon); |
| 998 | } |
| 999 | } |
| 1000 | |
| 1001 | static bool reg_is_world_roaming(struct wiphy *wiphy) |
| 1002 | { |
| 1003 | if (is_world_regdom(cfg80211_regdomain->alpha2) || |
| 1004 | (wiphy->regd && is_world_regdom(wiphy->regd->alpha2))) |
| 1005 | return true; |
Luis R. Rodriguez | b1ed8dd | 2009-05-02 00:34:15 -0400 | [diff] [blame] | 1006 | if (last_request && |
| 1007 | last_request->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && |
Johannes Berg | 5be83de | 2009-11-19 00:56:28 +0100 | [diff] [blame] | 1008 | wiphy->flags & WIPHY_FLAG_CUSTOM_REGULATORY) |
Luis R. Rodriguez | e38f8a7 | 2009-02-21 00:20:39 -0500 | [diff] [blame] | 1009 | return true; |
| 1010 | return false; |
| 1011 | } |
| 1012 | |
| 1013 | /* Reap the advantages of previously found beacons */ |
| 1014 | static void reg_process_beacons(struct wiphy *wiphy) |
| 1015 | { |
Luis R. Rodriguez | b1ed8dd | 2009-05-02 00:34:15 -0400 | [diff] [blame] | 1016 | /* |
| 1017 | * Means we are just firing up cfg80211, so no beacons would |
| 1018 | * have been processed yet. |
| 1019 | */ |
| 1020 | if (!last_request) |
| 1021 | return; |
Luis R. Rodriguez | e38f8a7 | 2009-02-21 00:20:39 -0500 | [diff] [blame] | 1022 | if (!reg_is_world_roaming(wiphy)) |
| 1023 | return; |
| 1024 | wiphy_update_beacon_reg(wiphy); |
| 1025 | } |
| 1026 | |
Luis R. Rodriguez | 038659e | 2009-05-02 00:37:17 -0400 | [diff] [blame] | 1027 | static bool is_ht40_not_allowed(struct ieee80211_channel *chan) |
| 1028 | { |
| 1029 | if (!chan) |
| 1030 | return true; |
| 1031 | if (chan->flags & IEEE80211_CHAN_DISABLED) |
| 1032 | return true; |
| 1033 | /* This would happen when regulatory rules disallow HT40 completely */ |
| 1034 | if (IEEE80211_CHAN_NO_HT40 == (chan->flags & (IEEE80211_CHAN_NO_HT40))) |
| 1035 | return true; |
| 1036 | return false; |
| 1037 | } |
| 1038 | |
| 1039 | static void reg_process_ht_flags_channel(struct wiphy *wiphy, |
| 1040 | enum ieee80211_band band, |
| 1041 | unsigned int chan_idx) |
| 1042 | { |
| 1043 | struct ieee80211_supported_band *sband; |
| 1044 | struct ieee80211_channel *channel; |
| 1045 | struct ieee80211_channel *channel_before = NULL, *channel_after = NULL; |
| 1046 | unsigned int i; |
| 1047 | |
| 1048 | assert_cfg80211_lock(); |
| 1049 | |
| 1050 | sband = wiphy->bands[band]; |
| 1051 | BUG_ON(chan_idx >= sband->n_channels); |
| 1052 | channel = &sband->channels[chan_idx]; |
| 1053 | |
| 1054 | if (is_ht40_not_allowed(channel)) { |
| 1055 | channel->flags |= IEEE80211_CHAN_NO_HT40; |
| 1056 | return; |
| 1057 | } |
| 1058 | |
| 1059 | /* |
| 1060 | * We need to ensure the extension channels exist to |
| 1061 | * be able to use HT40- or HT40+, this finds them (or not) |
| 1062 | */ |
| 1063 | for (i = 0; i < sband->n_channels; i++) { |
| 1064 | struct ieee80211_channel *c = &sband->channels[i]; |
| 1065 | if (c->center_freq == (channel->center_freq - 20)) |
| 1066 | channel_before = c; |
| 1067 | if (c->center_freq == (channel->center_freq + 20)) |
| 1068 | channel_after = c; |
| 1069 | } |
| 1070 | |
| 1071 | /* |
| 1072 | * Please note that this assumes target bandwidth is 20 MHz, |
| 1073 | * if that ever changes we also need to change the below logic |
| 1074 | * to include that as well. |
| 1075 | */ |
| 1076 | if (is_ht40_not_allowed(channel_before)) |
Luis R. Rodriguez | 689da1b | 2009-05-02 00:37:18 -0400 | [diff] [blame] | 1077 | channel->flags |= IEEE80211_CHAN_NO_HT40MINUS; |
Luis R. Rodriguez | 038659e | 2009-05-02 00:37:17 -0400 | [diff] [blame] | 1078 | else |
Luis R. Rodriguez | 689da1b | 2009-05-02 00:37:18 -0400 | [diff] [blame] | 1079 | channel->flags &= ~IEEE80211_CHAN_NO_HT40MINUS; |
Luis R. Rodriguez | 038659e | 2009-05-02 00:37:17 -0400 | [diff] [blame] | 1080 | |
| 1081 | if (is_ht40_not_allowed(channel_after)) |
Luis R. Rodriguez | 689da1b | 2009-05-02 00:37:18 -0400 | [diff] [blame] | 1082 | channel->flags |= IEEE80211_CHAN_NO_HT40PLUS; |
Luis R. Rodriguez | 038659e | 2009-05-02 00:37:17 -0400 | [diff] [blame] | 1083 | else |
Luis R. Rodriguez | 689da1b | 2009-05-02 00:37:18 -0400 | [diff] [blame] | 1084 | channel->flags &= ~IEEE80211_CHAN_NO_HT40PLUS; |
Luis R. Rodriguez | 038659e | 2009-05-02 00:37:17 -0400 | [diff] [blame] | 1085 | } |
| 1086 | |
| 1087 | static void reg_process_ht_flags_band(struct wiphy *wiphy, |
| 1088 | enum ieee80211_band band) |
| 1089 | { |
| 1090 | unsigned int i; |
| 1091 | struct ieee80211_supported_band *sband; |
| 1092 | |
| 1093 | BUG_ON(!wiphy->bands[band]); |
| 1094 | sband = wiphy->bands[band]; |
| 1095 | |
| 1096 | for (i = 0; i < sband->n_channels; i++) |
| 1097 | reg_process_ht_flags_channel(wiphy, band, i); |
| 1098 | } |
| 1099 | |
| 1100 | static void reg_process_ht_flags(struct wiphy *wiphy) |
| 1101 | { |
| 1102 | enum ieee80211_band band; |
| 1103 | |
| 1104 | if (!wiphy) |
| 1105 | return; |
| 1106 | |
| 1107 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) { |
| 1108 | if (wiphy->bands[band]) |
| 1109 | reg_process_ht_flags_band(wiphy, band); |
| 1110 | } |
| 1111 | |
| 1112 | } |
| 1113 | |
Sven Neumann | eac03e3 | 2011-08-30 23:38:53 +0200 | [diff] [blame] | 1114 | static void wiphy_update_regulatory(struct wiphy *wiphy, |
| 1115 | enum nl80211_reg_initiator initiator) |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 1116 | { |
| 1117 | enum ieee80211_band band; |
Luis R. Rodriguez | d46e5b1 | 2009-01-22 15:05:50 -0800 | [diff] [blame] | 1118 | |
Sven Neumann | eac03e3 | 2011-08-30 23:38:53 +0200 | [diff] [blame] | 1119 | assert_reg_lock(); |
| 1120 | |
Luis R. Rodriguez | 7db90f4 | 2009-03-09 22:07:41 -0400 | [diff] [blame] | 1121 | if (ignore_reg_update(wiphy, initiator)) |
Sven Neumann | a203c2a | 2011-07-12 15:52:07 +0200 | [diff] [blame] | 1122 | return; |
| 1123 | |
Luis R. Rodriguez | b68e6b3 | 2011-10-11 10:59:03 -0700 | [diff] [blame^] | 1124 | last_request->dfs_region = cfg80211_regdomain->dfs_region; |
| 1125 | |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 1126 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) { |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 1127 | if (wiphy->bands[band]) |
Luis R. Rodriguez | 7ca43d0 | 2010-10-20 10:18:53 -0700 | [diff] [blame] | 1128 | handle_band(wiphy, band, initiator); |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 1129 | } |
Sven Neumann | a203c2a | 2011-07-12 15:52:07 +0200 | [diff] [blame] | 1130 | |
Luis R. Rodriguez | e38f8a7 | 2009-02-21 00:20:39 -0500 | [diff] [blame] | 1131 | reg_process_beacons(wiphy); |
Luis R. Rodriguez | 038659e | 2009-05-02 00:37:17 -0400 | [diff] [blame] | 1132 | reg_process_ht_flags(wiphy); |
Luis R. Rodriguez | 560e28e | 2009-01-07 17:43:32 -0800 | [diff] [blame] | 1133 | if (wiphy->reg_notifier) |
Luis R. Rodriguez | 716f939 | 2009-01-22 15:05:51 -0800 | [diff] [blame] | 1134 | wiphy->reg_notifier(wiphy, last_request); |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 1135 | } |
| 1136 | |
Sven Neumann | eac03e3 | 2011-08-30 23:38:53 +0200 | [diff] [blame] | 1137 | void regulatory_update(struct wiphy *wiphy, |
| 1138 | enum nl80211_reg_initiator setby) |
| 1139 | { |
| 1140 | mutex_lock(®_mutex); |
| 1141 | wiphy_update_regulatory(wiphy, setby); |
| 1142 | mutex_unlock(®_mutex); |
| 1143 | } |
| 1144 | |
Sven Neumann | d7549cb | 2011-08-30 23:38:54 +0200 | [diff] [blame] | 1145 | static void update_all_wiphy_regulatory(enum nl80211_reg_initiator initiator) |
| 1146 | { |
| 1147 | struct cfg80211_registered_device *rdev; |
| 1148 | |
| 1149 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) |
| 1150 | wiphy_update_regulatory(&rdev->wiphy, initiator); |
| 1151 | } |
| 1152 | |
Luis R. Rodriguez | 1fa25e4 | 2009-01-22 15:05:44 -0800 | [diff] [blame] | 1153 | static void handle_channel_custom(struct wiphy *wiphy, |
| 1154 | enum ieee80211_band band, |
| 1155 | unsigned int chan_idx, |
| 1156 | const struct ieee80211_regdomain *regd) |
| 1157 | { |
| 1158 | int r; |
Luis R. Rodriguez | 038659e | 2009-05-02 00:37:17 -0400 | [diff] [blame] | 1159 | u32 desired_bw_khz = MHZ_TO_KHZ(20); |
| 1160 | u32 bw_flags = 0; |
Luis R. Rodriguez | 1fa25e4 | 2009-01-22 15:05:44 -0800 | [diff] [blame] | 1161 | const struct ieee80211_reg_rule *reg_rule = NULL; |
| 1162 | const struct ieee80211_power_rule *power_rule = NULL; |
Luis R. Rodriguez | 038659e | 2009-05-02 00:37:17 -0400 | [diff] [blame] | 1163 | const struct ieee80211_freq_range *freq_range = NULL; |
Luis R. Rodriguez | 1fa25e4 | 2009-01-22 15:05:44 -0800 | [diff] [blame] | 1164 | struct ieee80211_supported_band *sband; |
| 1165 | struct ieee80211_channel *chan; |
| 1166 | |
Luis R. Rodriguez | abc7381 | 2009-07-30 17:38:08 -0700 | [diff] [blame] | 1167 | assert_reg_lock(); |
Luis R. Rodriguez | ac46d48 | 2009-05-01 18:44:50 -0400 | [diff] [blame] | 1168 | |
Luis R. Rodriguez | 1fa25e4 | 2009-01-22 15:05:44 -0800 | [diff] [blame] | 1169 | sband = wiphy->bands[band]; |
| 1170 | BUG_ON(chan_idx >= sband->n_channels); |
| 1171 | chan = &sband->channels[chan_idx]; |
| 1172 | |
Luis R. Rodriguez | 038659e | 2009-05-02 00:37:17 -0400 | [diff] [blame] | 1173 | r = freq_reg_info_regd(wiphy, |
| 1174 | MHZ_TO_KHZ(chan->center_freq), |
| 1175 | desired_bw_khz, |
| 1176 | ®_rule, |
| 1177 | regd); |
Luis R. Rodriguez | 1fa25e4 | 2009-01-22 15:05:44 -0800 | [diff] [blame] | 1178 | |
| 1179 | if (r) { |
Luis R. Rodriguez | d91e41b | 2010-10-20 10:18:59 -0700 | [diff] [blame] | 1180 | REG_DBG_PRINT("Disabling freq %d MHz as custom " |
Luis R. Rodriguez | a651853 | 2010-10-20 10:18:57 -0700 | [diff] [blame] | 1181 | "regd has no rule that fits a %d MHz " |
| 1182 | "wide channel\n", |
| 1183 | chan->center_freq, |
| 1184 | KHZ_TO_MHZ(desired_bw_khz)); |
Luis R. Rodriguez | 1fa25e4 | 2009-01-22 15:05:44 -0800 | [diff] [blame] | 1185 | chan->flags = IEEE80211_CHAN_DISABLED; |
| 1186 | return; |
| 1187 | } |
| 1188 | |
Luis R. Rodriguez | e702d3c | 2010-10-21 19:17:04 +0530 | [diff] [blame] | 1189 | chan_reg_rule_print_dbg(chan, desired_bw_khz, reg_rule); |
| 1190 | |
Luis R. Rodriguez | 1fa25e4 | 2009-01-22 15:05:44 -0800 | [diff] [blame] | 1191 | power_rule = ®_rule->power_rule; |
Luis R. Rodriguez | 038659e | 2009-05-02 00:37:17 -0400 | [diff] [blame] | 1192 | freq_range = ®_rule->freq_range; |
Luis R. Rodriguez | 1fa25e4 | 2009-01-22 15:05:44 -0800 | [diff] [blame] | 1193 | |
Luis R. Rodriguez | 038659e | 2009-05-02 00:37:17 -0400 | [diff] [blame] | 1194 | if (freq_range->max_bandwidth_khz < MHZ_TO_KHZ(40)) |
| 1195 | bw_flags = IEEE80211_CHAN_NO_HT40; |
| 1196 | |
| 1197 | chan->flags |= map_regdom_flags(reg_rule->flags) | bw_flags; |
Luis R. Rodriguez | 1fa25e4 | 2009-01-22 15:05:44 -0800 | [diff] [blame] | 1198 | chan->max_antenna_gain = (int) MBI_TO_DBI(power_rule->max_antenna_gain); |
Luis R. Rodriguez | 1fa25e4 | 2009-01-22 15:05:44 -0800 | [diff] [blame] | 1199 | chan->max_power = (int) MBM_TO_DBM(power_rule->max_eirp); |
| 1200 | } |
| 1201 | |
| 1202 | static void handle_band_custom(struct wiphy *wiphy, enum ieee80211_band band, |
| 1203 | const struct ieee80211_regdomain *regd) |
| 1204 | { |
| 1205 | unsigned int i; |
| 1206 | struct ieee80211_supported_band *sband; |
| 1207 | |
| 1208 | BUG_ON(!wiphy->bands[band]); |
| 1209 | sband = wiphy->bands[band]; |
| 1210 | |
| 1211 | for (i = 0; i < sband->n_channels; i++) |
| 1212 | handle_channel_custom(wiphy, band, i, regd); |
| 1213 | } |
| 1214 | |
| 1215 | /* Used by drivers prior to wiphy registration */ |
| 1216 | void wiphy_apply_custom_regulatory(struct wiphy *wiphy, |
| 1217 | const struct ieee80211_regdomain *regd) |
| 1218 | { |
| 1219 | enum ieee80211_band band; |
Luis R. Rodriguez | bbcf3f0 | 2009-05-19 17:49:47 -0400 | [diff] [blame] | 1220 | unsigned int bands_set = 0; |
Luis R. Rodriguez | ac46d48 | 2009-05-01 18:44:50 -0400 | [diff] [blame] | 1221 | |
Luis R. Rodriguez | abc7381 | 2009-07-30 17:38:08 -0700 | [diff] [blame] | 1222 | mutex_lock(®_mutex); |
Luis R. Rodriguez | 1fa25e4 | 2009-01-22 15:05:44 -0800 | [diff] [blame] | 1223 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) { |
Luis R. Rodriguez | bbcf3f0 | 2009-05-19 17:49:47 -0400 | [diff] [blame] | 1224 | if (!wiphy->bands[band]) |
| 1225 | continue; |
| 1226 | handle_band_custom(wiphy, band, regd); |
| 1227 | bands_set++; |
Luis R. Rodriguez | 1fa25e4 | 2009-01-22 15:05:44 -0800 | [diff] [blame] | 1228 | } |
Luis R. Rodriguez | abc7381 | 2009-07-30 17:38:08 -0700 | [diff] [blame] | 1229 | mutex_unlock(®_mutex); |
Luis R. Rodriguez | bbcf3f0 | 2009-05-19 17:49:47 -0400 | [diff] [blame] | 1230 | |
| 1231 | /* |
| 1232 | * no point in calling this if it won't have any effect |
| 1233 | * on your device's supportd bands. |
| 1234 | */ |
| 1235 | WARN_ON(!bands_set); |
Luis R. Rodriguez | 1fa25e4 | 2009-01-22 15:05:44 -0800 | [diff] [blame] | 1236 | } |
| 1237 | EXPORT_SYMBOL(wiphy_apply_custom_regulatory); |
| 1238 | |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 1239 | /* |
| 1240 | * Return value which can be used by ignore_request() to indicate |
| 1241 | * it has been determined we should intersect two regulatory domains |
| 1242 | */ |
Luis R. Rodriguez | 9c96477 | 2008-10-30 13:33:53 -0700 | [diff] [blame] | 1243 | #define REG_INTERSECT 1 |
| 1244 | |
Johannes Berg | 84fa4f4 | 2008-10-24 20:32:23 +0200 | [diff] [blame] | 1245 | /* This has the logic which determines when a new request |
| 1246 | * should be ignored. */ |
Luis R. Rodriguez | 2f92cd2 | 2009-02-21 00:24:16 -0500 | [diff] [blame] | 1247 | static int ignore_request(struct wiphy *wiphy, |
| 1248 | struct regulatory_request *pending_request) |
Johannes Berg | 84fa4f4 | 2008-10-24 20:32:23 +0200 | [diff] [blame] | 1249 | { |
Luis R. Rodriguez | 806a9e3 | 2009-02-21 00:04:26 -0500 | [diff] [blame] | 1250 | struct wiphy *last_wiphy = NULL; |
Luis R. Rodriguez | 761cf7e | 2009-02-21 00:04:25 -0500 | [diff] [blame] | 1251 | |
| 1252 | assert_cfg80211_lock(); |
| 1253 | |
Johannes Berg | 84fa4f4 | 2008-10-24 20:32:23 +0200 | [diff] [blame] | 1254 | /* All initial requests are respected */ |
| 1255 | if (!last_request) |
| 1256 | return 0; |
| 1257 | |
Luis R. Rodriguez | 2f92cd2 | 2009-02-21 00:24:16 -0500 | [diff] [blame] | 1258 | switch (pending_request->initiator) { |
Luis R. Rodriguez | 7db90f4 | 2009-03-09 22:07:41 -0400 | [diff] [blame] | 1259 | case NL80211_REGDOM_SET_BY_CORE: |
Luis R. Rodriguez | 09d989d | 2010-01-29 19:58:57 -0500 | [diff] [blame] | 1260 | return 0; |
Luis R. Rodriguez | 7db90f4 | 2009-03-09 22:07:41 -0400 | [diff] [blame] | 1261 | case NL80211_REGDOM_SET_BY_COUNTRY_IE: |
Luis R. Rodriguez | 806a9e3 | 2009-02-21 00:04:26 -0500 | [diff] [blame] | 1262 | |
| 1263 | last_wiphy = wiphy_idx_to_wiphy(last_request->wiphy_idx); |
| 1264 | |
Luis R. Rodriguez | 2f92cd2 | 2009-02-21 00:24:16 -0500 | [diff] [blame] | 1265 | if (unlikely(!is_an_alpha2(pending_request->alpha2))) |
Johannes Berg | 84fa4f4 | 2008-10-24 20:32:23 +0200 | [diff] [blame] | 1266 | return -EINVAL; |
Luis R. Rodriguez | 7db90f4 | 2009-03-09 22:07:41 -0400 | [diff] [blame] | 1267 | if (last_request->initiator == |
| 1268 | NL80211_REGDOM_SET_BY_COUNTRY_IE) { |
Luis R. Rodriguez | 806a9e3 | 2009-02-21 00:04:26 -0500 | [diff] [blame] | 1269 | if (last_wiphy != wiphy) { |
Johannes Berg | 84fa4f4 | 2008-10-24 20:32:23 +0200 | [diff] [blame] | 1270 | /* |
| 1271 | * Two cards with two APs claiming different |
Thadeu Lima de Souza Cascardo | 1fe90b0 | 2009-08-11 11:18:42 -0300 | [diff] [blame] | 1272 | * Country IE alpha2s. We could |
Johannes Berg | 84fa4f4 | 2008-10-24 20:32:23 +0200 | [diff] [blame] | 1273 | * intersect them, but that seems unlikely |
| 1274 | * to be correct. Reject second one for now. |
| 1275 | */ |
Luis R. Rodriguez | 2f92cd2 | 2009-02-21 00:24:16 -0500 | [diff] [blame] | 1276 | if (regdom_changes(pending_request->alpha2)) |
Johannes Berg | 84fa4f4 | 2008-10-24 20:32:23 +0200 | [diff] [blame] | 1277 | return -EOPNOTSUPP; |
| 1278 | return -EALREADY; |
| 1279 | } |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 1280 | /* |
| 1281 | * Two consecutive Country IE hints on the same wiphy. |
| 1282 | * This should be picked up early by the driver/stack |
| 1283 | */ |
Luis R. Rodriguez | 2f92cd2 | 2009-02-21 00:24:16 -0500 | [diff] [blame] | 1284 | if (WARN_ON(regdom_changes(pending_request->alpha2))) |
Johannes Berg | 84fa4f4 | 2008-10-24 20:32:23 +0200 | [diff] [blame] | 1285 | return 0; |
| 1286 | return -EALREADY; |
| 1287 | } |
Luis R. Rodriguez | a171fba | 2010-10-18 17:44:51 -0700 | [diff] [blame] | 1288 | return 0; |
Luis R. Rodriguez | 7db90f4 | 2009-03-09 22:07:41 -0400 | [diff] [blame] | 1289 | case NL80211_REGDOM_SET_BY_DRIVER: |
| 1290 | if (last_request->initiator == NL80211_REGDOM_SET_BY_CORE) { |
Luis R. Rodriguez | 2f92cd2 | 2009-02-21 00:24:16 -0500 | [diff] [blame] | 1291 | if (regdom_changes(pending_request->alpha2)) |
Luis R. Rodriguez | e74b1e7 | 2009-01-22 15:05:48 -0800 | [diff] [blame] | 1292 | return 0; |
Johannes Berg | 84fa4f4 | 2008-10-24 20:32:23 +0200 | [diff] [blame] | 1293 | return -EALREADY; |
Luis R. Rodriguez | e74b1e7 | 2009-01-22 15:05:48 -0800 | [diff] [blame] | 1294 | } |
Luis R. Rodriguez | fff32c0 | 2009-02-21 00:04:32 -0500 | [diff] [blame] | 1295 | |
| 1296 | /* |
| 1297 | * This would happen if you unplug and plug your card |
| 1298 | * back in or if you add a new device for which the previously |
| 1299 | * loaded card also agrees on the regulatory domain. |
| 1300 | */ |
Luis R. Rodriguez | 7db90f4 | 2009-03-09 22:07:41 -0400 | [diff] [blame] | 1301 | if (last_request->initiator == NL80211_REGDOM_SET_BY_DRIVER && |
Luis R. Rodriguez | 2f92cd2 | 2009-02-21 00:24:16 -0500 | [diff] [blame] | 1302 | !regdom_changes(pending_request->alpha2)) |
Luis R. Rodriguez | fff32c0 | 2009-02-21 00:04:32 -0500 | [diff] [blame] | 1303 | return -EALREADY; |
| 1304 | |
Luis R. Rodriguez | 3e0c3ff | 2009-01-07 17:43:34 -0800 | [diff] [blame] | 1305 | return REG_INTERSECT; |
Luis R. Rodriguez | 7db90f4 | 2009-03-09 22:07:41 -0400 | [diff] [blame] | 1306 | case NL80211_REGDOM_SET_BY_USER: |
| 1307 | if (last_request->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) |
Luis R. Rodriguez | 9c96477 | 2008-10-30 13:33:53 -0700 | [diff] [blame] | 1308 | return REG_INTERSECT; |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 1309 | /* |
| 1310 | * If the user knows better the user should set the regdom |
| 1311 | * to their country before the IE is picked up |
| 1312 | */ |
Luis R. Rodriguez | 7db90f4 | 2009-03-09 22:07:41 -0400 | [diff] [blame] | 1313 | if (last_request->initiator == NL80211_REGDOM_SET_BY_USER && |
Luis R. Rodriguez | 3f2355c | 2008-11-12 14:22:02 -0800 | [diff] [blame] | 1314 | last_request->intersect) |
| 1315 | return -EOPNOTSUPP; |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 1316 | /* |
| 1317 | * Process user requests only after previous user/driver/core |
| 1318 | * requests have been processed |
| 1319 | */ |
Luis R. Rodriguez | 7db90f4 | 2009-03-09 22:07:41 -0400 | [diff] [blame] | 1320 | if (last_request->initiator == NL80211_REGDOM_SET_BY_CORE || |
| 1321 | last_request->initiator == NL80211_REGDOM_SET_BY_DRIVER || |
| 1322 | last_request->initiator == NL80211_REGDOM_SET_BY_USER) { |
Luis R. Rodriguez | 69b1572 | 2009-02-21 00:04:33 -0500 | [diff] [blame] | 1323 | if (regdom_changes(last_request->alpha2)) |
Luis R. Rodriguez | 5eebade | 2009-01-22 15:05:47 -0800 | [diff] [blame] | 1324 | return -EAGAIN; |
| 1325 | } |
| 1326 | |
John W. Linville | baeb66f | 2009-12-18 17:59:02 -0500 | [diff] [blame] | 1327 | if (!regdom_changes(pending_request->alpha2)) |
Luis R. Rodriguez | e74b1e7 | 2009-01-22 15:05:48 -0800 | [diff] [blame] | 1328 | return -EALREADY; |
| 1329 | |
Johannes Berg | 84fa4f4 | 2008-10-24 20:32:23 +0200 | [diff] [blame] | 1330 | return 0; |
| 1331 | } |
| 1332 | |
| 1333 | return -EINVAL; |
| 1334 | } |
| 1335 | |
Luis R. Rodriguez | b2e253c | 2010-11-17 21:46:09 -0800 | [diff] [blame] | 1336 | static void reg_set_request_processed(void) |
| 1337 | { |
| 1338 | bool need_more_processing = false; |
| 1339 | |
| 1340 | last_request->processed = true; |
| 1341 | |
| 1342 | spin_lock(®_requests_lock); |
| 1343 | if (!list_empty(®_requests_list)) |
| 1344 | need_more_processing = true; |
| 1345 | spin_unlock(®_requests_lock); |
| 1346 | |
Luis R. Rodriguez | a90c7a3 | 2011-04-05 10:49:04 -0700 | [diff] [blame] | 1347 | if (last_request->initiator == NL80211_REGDOM_SET_BY_USER) |
| 1348 | cancel_delayed_work_sync(®_timeout); |
| 1349 | |
Luis R. Rodriguez | b2e253c | 2010-11-17 21:46:09 -0800 | [diff] [blame] | 1350 | if (need_more_processing) |
| 1351 | schedule_work(®_work); |
| 1352 | } |
| 1353 | |
Luis R. Rodriguez | d1c96a9 | 2009-02-21 00:24:13 -0500 | [diff] [blame] | 1354 | /** |
| 1355 | * __regulatory_hint - hint to the wireless core a regulatory domain |
| 1356 | * @wiphy: if the hint comes from country information from an AP, this |
| 1357 | * is required to be set to the wiphy that received the information |
Luis R. Rodriguez | 28da32d | 2009-02-21 00:24:14 -0500 | [diff] [blame] | 1358 | * @pending_request: the regulatory request currently being processed |
Luis R. Rodriguez | d1c96a9 | 2009-02-21 00:24:13 -0500 | [diff] [blame] | 1359 | * |
| 1360 | * The Wireless subsystem can use this function to hint to the wireless core |
Luis R. Rodriguez | 28da32d | 2009-02-21 00:24:14 -0500 | [diff] [blame] | 1361 | * what it believes should be the current regulatory domain. |
Luis R. Rodriguez | d1c96a9 | 2009-02-21 00:24:13 -0500 | [diff] [blame] | 1362 | * |
| 1363 | * Returns zero if all went fine, %-EALREADY if a regulatory domain had |
| 1364 | * already been set or other standard error codes. |
| 1365 | * |
Luis R. Rodriguez | abc7381 | 2009-07-30 17:38:08 -0700 | [diff] [blame] | 1366 | * Caller must hold &cfg80211_mutex and ®_mutex |
Luis R. Rodriguez | d1c96a9 | 2009-02-21 00:24:13 -0500 | [diff] [blame] | 1367 | */ |
Luis R. Rodriguez | 28da32d | 2009-02-21 00:24:14 -0500 | [diff] [blame] | 1368 | static int __regulatory_hint(struct wiphy *wiphy, |
| 1369 | struct regulatory_request *pending_request) |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 1370 | { |
Luis R. Rodriguez | 9c96477 | 2008-10-30 13:33:53 -0700 | [diff] [blame] | 1371 | bool intersect = false; |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 1372 | int r = 0; |
| 1373 | |
Luis R. Rodriguez | 761cf7e | 2009-02-21 00:04:25 -0500 | [diff] [blame] | 1374 | assert_cfg80211_lock(); |
| 1375 | |
Luis R. Rodriguez | 2f92cd2 | 2009-02-21 00:24:16 -0500 | [diff] [blame] | 1376 | r = ignore_request(wiphy, pending_request); |
Luis R. Rodriguez | 9c96477 | 2008-10-30 13:33:53 -0700 | [diff] [blame] | 1377 | |
Luis R. Rodriguez | 3e0c3ff | 2009-01-07 17:43:34 -0800 | [diff] [blame] | 1378 | if (r == REG_INTERSECT) { |
Luis R. Rodriguez | 7db90f4 | 2009-03-09 22:07:41 -0400 | [diff] [blame] | 1379 | if (pending_request->initiator == |
| 1380 | NL80211_REGDOM_SET_BY_DRIVER) { |
Luis R. Rodriguez | 3e0c3ff | 2009-01-07 17:43:34 -0800 | [diff] [blame] | 1381 | r = reg_copy_regd(&wiphy->regd, cfg80211_regdomain); |
Luis R. Rodriguez | d951c1d | 2009-02-21 00:24:15 -0500 | [diff] [blame] | 1382 | if (r) { |
| 1383 | kfree(pending_request); |
Luis R. Rodriguez | 3e0c3ff | 2009-01-07 17:43:34 -0800 | [diff] [blame] | 1384 | return r; |
Luis R. Rodriguez | d951c1d | 2009-02-21 00:24:15 -0500 | [diff] [blame] | 1385 | } |
Luis R. Rodriguez | 3e0c3ff | 2009-01-07 17:43:34 -0800 | [diff] [blame] | 1386 | } |
Luis R. Rodriguez | 9c96477 | 2008-10-30 13:33:53 -0700 | [diff] [blame] | 1387 | intersect = true; |
Luis R. Rodriguez | 3e0c3ff | 2009-01-07 17:43:34 -0800 | [diff] [blame] | 1388 | } else if (r) { |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 1389 | /* |
| 1390 | * If the regulatory domain being requested by the |
Luis R. Rodriguez | 3e0c3ff | 2009-01-07 17:43:34 -0800 | [diff] [blame] | 1391 | * driver has already been set just copy it to the |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 1392 | * wiphy |
| 1393 | */ |
Luis R. Rodriguez | 28da32d | 2009-02-21 00:24:14 -0500 | [diff] [blame] | 1394 | if (r == -EALREADY && |
Luis R. Rodriguez | 7db90f4 | 2009-03-09 22:07:41 -0400 | [diff] [blame] | 1395 | pending_request->initiator == |
| 1396 | NL80211_REGDOM_SET_BY_DRIVER) { |
Luis R. Rodriguez | 3e0c3ff | 2009-01-07 17:43:34 -0800 | [diff] [blame] | 1397 | r = reg_copy_regd(&wiphy->regd, cfg80211_regdomain); |
Luis R. Rodriguez | d951c1d | 2009-02-21 00:24:15 -0500 | [diff] [blame] | 1398 | if (r) { |
| 1399 | kfree(pending_request); |
Luis R. Rodriguez | 3e0c3ff | 2009-01-07 17:43:34 -0800 | [diff] [blame] | 1400 | return r; |
Luis R. Rodriguez | d951c1d | 2009-02-21 00:24:15 -0500 | [diff] [blame] | 1401 | } |
Luis R. Rodriguez | 3e0c3ff | 2009-01-07 17:43:34 -0800 | [diff] [blame] | 1402 | r = -EALREADY; |
| 1403 | goto new_request; |
| 1404 | } |
Luis R. Rodriguez | d951c1d | 2009-02-21 00:24:15 -0500 | [diff] [blame] | 1405 | kfree(pending_request); |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 1406 | return r; |
Luis R. Rodriguez | 3e0c3ff | 2009-01-07 17:43:34 -0800 | [diff] [blame] | 1407 | } |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 1408 | |
Luis R. Rodriguez | 3e0c3ff | 2009-01-07 17:43:34 -0800 | [diff] [blame] | 1409 | new_request: |
Luis R. Rodriguez | 5203cdb | 2008-11-12 14:21:56 -0800 | [diff] [blame] | 1410 | kfree(last_request); |
Luis R. Rodriguez | d951c1d | 2009-02-21 00:24:15 -0500 | [diff] [blame] | 1411 | |
| 1412 | last_request = pending_request; |
| 1413 | last_request->intersect = intersect; |
| 1414 | |
| 1415 | pending_request = NULL; |
Luis R. Rodriguez | 3e0c3ff | 2009-01-07 17:43:34 -0800 | [diff] [blame] | 1416 | |
Luis R. Rodriguez | 09d989d | 2010-01-29 19:58:57 -0500 | [diff] [blame] | 1417 | if (last_request->initiator == NL80211_REGDOM_SET_BY_USER) { |
| 1418 | user_alpha2[0] = last_request->alpha2[0]; |
| 1419 | user_alpha2[1] = last_request->alpha2[1]; |
| 1420 | } |
| 1421 | |
Luis R. Rodriguez | 3e0c3ff | 2009-01-07 17:43:34 -0800 | [diff] [blame] | 1422 | /* When r == REG_INTERSECT we do need to call CRDA */ |
Luis R. Rodriguez | 73d54c9 | 2009-03-09 22:07:42 -0400 | [diff] [blame] | 1423 | if (r < 0) { |
| 1424 | /* |
| 1425 | * Since CRDA will not be called in this case as we already |
| 1426 | * have applied the requested regulatory domain before we just |
| 1427 | * inform userspace we have processed the request |
| 1428 | */ |
Luis R. Rodriguez | b2e253c | 2010-11-17 21:46:09 -0800 | [diff] [blame] | 1429 | if (r == -EALREADY) { |
Luis R. Rodriguez | 73d54c9 | 2009-03-09 22:07:42 -0400 | [diff] [blame] | 1430 | nl80211_send_reg_change_event(last_request); |
Luis R. Rodriguez | b2e253c | 2010-11-17 21:46:09 -0800 | [diff] [blame] | 1431 | reg_set_request_processed(); |
| 1432 | } |
Luis R. Rodriguez | 3e0c3ff | 2009-01-07 17:43:34 -0800 | [diff] [blame] | 1433 | return r; |
Luis R. Rodriguez | 73d54c9 | 2009-03-09 22:07:42 -0400 | [diff] [blame] | 1434 | } |
Luis R. Rodriguez | 3e0c3ff | 2009-01-07 17:43:34 -0800 | [diff] [blame] | 1435 | |
Luis R. Rodriguez | d951c1d | 2009-02-21 00:24:15 -0500 | [diff] [blame] | 1436 | return call_crda(last_request->alpha2); |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 1437 | } |
| 1438 | |
Luis R. Rodriguez | 30a548c | 2009-05-02 01:17:27 -0400 | [diff] [blame] | 1439 | /* This processes *all* regulatory hints */ |
Luis R. Rodriguez | d951c1d | 2009-02-21 00:24:15 -0500 | [diff] [blame] | 1440 | static void reg_process_hint(struct regulatory_request *reg_request) |
Luis R. Rodriguez | fe33eb3 | 2009-02-21 00:04:30 -0500 | [diff] [blame] | 1441 | { |
| 1442 | int r = 0; |
| 1443 | struct wiphy *wiphy = NULL; |
Yuri Ershov | c4c3229 | 2010-06-29 15:08:08 +0400 | [diff] [blame] | 1444 | enum nl80211_reg_initiator initiator = reg_request->initiator; |
Luis R. Rodriguez | fe33eb3 | 2009-02-21 00:04:30 -0500 | [diff] [blame] | 1445 | |
| 1446 | BUG_ON(!reg_request->alpha2); |
| 1447 | |
Luis R. Rodriguez | fe33eb3 | 2009-02-21 00:04:30 -0500 | [diff] [blame] | 1448 | if (wiphy_idx_valid(reg_request->wiphy_idx)) |
| 1449 | wiphy = wiphy_idx_to_wiphy(reg_request->wiphy_idx); |
| 1450 | |
Luis R. Rodriguez | 7db90f4 | 2009-03-09 22:07:41 -0400 | [diff] [blame] | 1451 | if (reg_request->initiator == NL80211_REGDOM_SET_BY_DRIVER && |
Luis R. Rodriguez | fe33eb3 | 2009-02-21 00:04:30 -0500 | [diff] [blame] | 1452 | !wiphy) { |
Luis R. Rodriguez | d951c1d | 2009-02-21 00:24:15 -0500 | [diff] [blame] | 1453 | kfree(reg_request); |
Luis R. Rodriguez | b0e2880 | 2010-11-17 21:46:08 -0800 | [diff] [blame] | 1454 | return; |
Luis R. Rodriguez | fe33eb3 | 2009-02-21 00:04:30 -0500 | [diff] [blame] | 1455 | } |
| 1456 | |
Luis R. Rodriguez | 28da32d | 2009-02-21 00:24:14 -0500 | [diff] [blame] | 1457 | r = __regulatory_hint(wiphy, reg_request); |
Luis R. Rodriguez | fe33eb3 | 2009-02-21 00:04:30 -0500 | [diff] [blame] | 1458 | /* This is required so that the orig_* parameters are saved */ |
Johannes Berg | 5be83de | 2009-11-19 00:56:28 +0100 | [diff] [blame] | 1459 | if (r == -EALREADY && wiphy && |
Luis R. Rodriguez | a90c7a3 | 2011-04-05 10:49:04 -0700 | [diff] [blame] | 1460 | wiphy->flags & WIPHY_FLAG_STRICT_REGULATORY) { |
Yuri Ershov | c4c3229 | 2010-06-29 15:08:08 +0400 | [diff] [blame] | 1461 | wiphy_update_regulatory(wiphy, initiator); |
Luis R. Rodriguez | a90c7a3 | 2011-04-05 10:49:04 -0700 | [diff] [blame] | 1462 | return; |
| 1463 | } |
| 1464 | |
| 1465 | /* |
| 1466 | * We only time out user hints, given that they should be the only |
| 1467 | * source of bogus requests. |
| 1468 | */ |
Luis R. Rodriguez | c989bb1 | 2011-04-25 18:35:48 -0700 | [diff] [blame] | 1469 | if (r != -EALREADY && |
| 1470 | reg_request->initiator == NL80211_REGDOM_SET_BY_USER) |
Luis R. Rodriguez | a90c7a3 | 2011-04-05 10:49:04 -0700 | [diff] [blame] | 1471 | schedule_delayed_work(®_timeout, msecs_to_jiffies(3142)); |
Luis R. Rodriguez | fe33eb3 | 2009-02-21 00:04:30 -0500 | [diff] [blame] | 1472 | } |
| 1473 | |
Luis R. Rodriguez | b2e253c | 2010-11-17 21:46:09 -0800 | [diff] [blame] | 1474 | /* |
| 1475 | * Processes regulatory hints, this is all the NL80211_REGDOM_SET_BY_* |
| 1476 | * Regulatory hints come on a first come first serve basis and we |
| 1477 | * must process each one atomically. |
| 1478 | */ |
Luis R. Rodriguez | fe33eb3 | 2009-02-21 00:04:30 -0500 | [diff] [blame] | 1479 | static void reg_process_pending_hints(void) |
Luis R. Rodriguez | b0e2880 | 2010-11-17 21:46:08 -0800 | [diff] [blame] | 1480 | { |
Luis R. Rodriguez | fe33eb3 | 2009-02-21 00:04:30 -0500 | [diff] [blame] | 1481 | struct regulatory_request *reg_request; |
Luis R. Rodriguez | fe33eb3 | 2009-02-21 00:04:30 -0500 | [diff] [blame] | 1482 | |
Luis R. Rodriguez | b0e2880 | 2010-11-17 21:46:08 -0800 | [diff] [blame] | 1483 | mutex_lock(&cfg80211_mutex); |
| 1484 | mutex_lock(®_mutex); |
| 1485 | |
Luis R. Rodriguez | b2e253c | 2010-11-17 21:46:09 -0800 | [diff] [blame] | 1486 | /* When last_request->processed becomes true this will be rescheduled */ |
| 1487 | if (last_request && !last_request->processed) { |
| 1488 | REG_DBG_PRINT("Pending regulatory request, waiting " |
Joe Perches | 12c5ffb | 2011-07-29 14:51:25 -0700 | [diff] [blame] | 1489 | "for it to be processed...\n"); |
Luis R. Rodriguez | b2e253c | 2010-11-17 21:46:09 -0800 | [diff] [blame] | 1490 | goto out; |
Luis R. Rodriguez | fe33eb3 | 2009-02-21 00:04:30 -0500 | [diff] [blame] | 1491 | } |
Luis R. Rodriguez | b2e253c | 2010-11-17 21:46:09 -0800 | [diff] [blame] | 1492 | |
| 1493 | spin_lock(®_requests_lock); |
| 1494 | |
| 1495 | if (list_empty(®_requests_list)) { |
| 1496 | spin_unlock(®_requests_lock); |
| 1497 | goto out; |
| 1498 | } |
| 1499 | |
| 1500 | reg_request = list_first_entry(®_requests_list, |
| 1501 | struct regulatory_request, |
| 1502 | list); |
| 1503 | list_del_init(®_request->list); |
| 1504 | |
Luis R. Rodriguez | fe33eb3 | 2009-02-21 00:04:30 -0500 | [diff] [blame] | 1505 | spin_unlock(®_requests_lock); |
Luis R. Rodriguez | b0e2880 | 2010-11-17 21:46:08 -0800 | [diff] [blame] | 1506 | |
Luis R. Rodriguez | b2e253c | 2010-11-17 21:46:09 -0800 | [diff] [blame] | 1507 | reg_process_hint(reg_request); |
| 1508 | |
| 1509 | out: |
Luis R. Rodriguez | b0e2880 | 2010-11-17 21:46:08 -0800 | [diff] [blame] | 1510 | mutex_unlock(®_mutex); |
| 1511 | mutex_unlock(&cfg80211_mutex); |
Luis R. Rodriguez | fe33eb3 | 2009-02-21 00:04:30 -0500 | [diff] [blame] | 1512 | } |
| 1513 | |
Luis R. Rodriguez | e38f8a7 | 2009-02-21 00:20:39 -0500 | [diff] [blame] | 1514 | /* Processes beacon hints -- this has nothing to do with country IEs */ |
| 1515 | static void reg_process_pending_beacon_hints(void) |
| 1516 | { |
Johannes Berg | 79c97e9 | 2009-07-07 03:56:12 +0200 | [diff] [blame] | 1517 | struct cfg80211_registered_device *rdev; |
Luis R. Rodriguez | e38f8a7 | 2009-02-21 00:20:39 -0500 | [diff] [blame] | 1518 | struct reg_beacon *pending_beacon, *tmp; |
| 1519 | |
Luis R. Rodriguez | abc7381 | 2009-07-30 17:38:08 -0700 | [diff] [blame] | 1520 | /* |
| 1521 | * No need to hold the reg_mutex here as we just touch wiphys |
| 1522 | * and do not read or access regulatory variables. |
| 1523 | */ |
Luis R. Rodriguez | e38f8a7 | 2009-02-21 00:20:39 -0500 | [diff] [blame] | 1524 | mutex_lock(&cfg80211_mutex); |
| 1525 | |
| 1526 | /* This goes through the _pending_ beacon list */ |
| 1527 | spin_lock_bh(®_pending_beacons_lock); |
| 1528 | |
| 1529 | if (list_empty(®_pending_beacons)) { |
| 1530 | spin_unlock_bh(®_pending_beacons_lock); |
| 1531 | goto out; |
| 1532 | } |
| 1533 | |
| 1534 | list_for_each_entry_safe(pending_beacon, tmp, |
| 1535 | ®_pending_beacons, list) { |
| 1536 | |
| 1537 | list_del_init(&pending_beacon->list); |
| 1538 | |
| 1539 | /* Applies the beacon hint to current wiphys */ |
Johannes Berg | 79c97e9 | 2009-07-07 03:56:12 +0200 | [diff] [blame] | 1540 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) |
| 1541 | wiphy_update_new_beacon(&rdev->wiphy, pending_beacon); |
Luis R. Rodriguez | e38f8a7 | 2009-02-21 00:20:39 -0500 | [diff] [blame] | 1542 | |
| 1543 | /* Remembers the beacon hint for new wiphys or reg changes */ |
| 1544 | list_add_tail(&pending_beacon->list, ®_beacon_list); |
| 1545 | } |
| 1546 | |
| 1547 | spin_unlock_bh(®_pending_beacons_lock); |
| 1548 | out: |
| 1549 | mutex_unlock(&cfg80211_mutex); |
| 1550 | } |
| 1551 | |
Luis R. Rodriguez | fe33eb3 | 2009-02-21 00:04:30 -0500 | [diff] [blame] | 1552 | static void reg_todo(struct work_struct *work) |
| 1553 | { |
| 1554 | reg_process_pending_hints(); |
Luis R. Rodriguez | e38f8a7 | 2009-02-21 00:20:39 -0500 | [diff] [blame] | 1555 | reg_process_pending_beacon_hints(); |
Luis R. Rodriguez | fe33eb3 | 2009-02-21 00:04:30 -0500 | [diff] [blame] | 1556 | } |
| 1557 | |
Luis R. Rodriguez | fe33eb3 | 2009-02-21 00:04:30 -0500 | [diff] [blame] | 1558 | static void queue_regulatory_request(struct regulatory_request *request) |
| 1559 | { |
John W. Linville | c61029c | 2010-08-05 14:26:24 -0400 | [diff] [blame] | 1560 | if (isalpha(request->alpha2[0])) |
| 1561 | request->alpha2[0] = toupper(request->alpha2[0]); |
| 1562 | if (isalpha(request->alpha2[1])) |
| 1563 | request->alpha2[1] = toupper(request->alpha2[1]); |
| 1564 | |
Luis R. Rodriguez | fe33eb3 | 2009-02-21 00:04:30 -0500 | [diff] [blame] | 1565 | spin_lock(®_requests_lock); |
| 1566 | list_add_tail(&request->list, ®_requests_list); |
| 1567 | spin_unlock(®_requests_lock); |
| 1568 | |
| 1569 | schedule_work(®_work); |
| 1570 | } |
| 1571 | |
Luis R. Rodriguez | 09d989d | 2010-01-29 19:58:57 -0500 | [diff] [blame] | 1572 | /* |
| 1573 | * Core regulatory hint -- happens during cfg80211_init() |
| 1574 | * and when we restore regulatory settings. |
| 1575 | */ |
Luis R. Rodriguez | ba25c14 | 2009-02-21 00:04:23 -0500 | [diff] [blame] | 1576 | static int regulatory_hint_core(const char *alpha2) |
| 1577 | { |
| 1578 | struct regulatory_request *request; |
| 1579 | |
Luis R. Rodriguez | 09d989d | 2010-01-29 19:58:57 -0500 | [diff] [blame] | 1580 | kfree(last_request); |
| 1581 | last_request = NULL; |
Luis R. Rodriguez | ba25c14 | 2009-02-21 00:04:23 -0500 | [diff] [blame] | 1582 | |
| 1583 | request = kzalloc(sizeof(struct regulatory_request), |
| 1584 | GFP_KERNEL); |
| 1585 | if (!request) |
| 1586 | return -ENOMEM; |
| 1587 | |
| 1588 | request->alpha2[0] = alpha2[0]; |
| 1589 | request->alpha2[1] = alpha2[1]; |
Luis R. Rodriguez | 7db90f4 | 2009-03-09 22:07:41 -0400 | [diff] [blame] | 1590 | request->initiator = NL80211_REGDOM_SET_BY_CORE; |
Luis R. Rodriguez | ba25c14 | 2009-02-21 00:04:23 -0500 | [diff] [blame] | 1591 | |
Luis R. Rodriguez | 31e9972 | 2010-11-17 21:46:06 -0800 | [diff] [blame] | 1592 | queue_regulatory_request(request); |
Luis R. Rodriguez | 5078b2e | 2009-05-13 17:04:42 -0400 | [diff] [blame] | 1593 | |
Luis R. Rodriguez | fe33eb3 | 2009-02-21 00:04:30 -0500 | [diff] [blame] | 1594 | return 0; |
Luis R. Rodriguez | ba25c14 | 2009-02-21 00:04:23 -0500 | [diff] [blame] | 1595 | } |
| 1596 | |
Luis R. Rodriguez | fe33eb3 | 2009-02-21 00:04:30 -0500 | [diff] [blame] | 1597 | /* User hints */ |
| 1598 | int regulatory_hint_user(const char *alpha2) |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 1599 | { |
Luis R. Rodriguez | fe33eb3 | 2009-02-21 00:04:30 -0500 | [diff] [blame] | 1600 | struct regulatory_request *request; |
| 1601 | |
Johannes Berg | be3d481 | 2008-10-24 20:32:21 +0200 | [diff] [blame] | 1602 | BUG_ON(!alpha2); |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 1603 | |
Luis R. Rodriguez | fe33eb3 | 2009-02-21 00:04:30 -0500 | [diff] [blame] | 1604 | request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); |
| 1605 | if (!request) |
| 1606 | return -ENOMEM; |
| 1607 | |
| 1608 | request->wiphy_idx = WIPHY_IDX_STALE; |
| 1609 | request->alpha2[0] = alpha2[0]; |
| 1610 | request->alpha2[1] = alpha2[1]; |
Luis R. Rodriguez | e12822e | 2010-01-04 11:37:39 -0500 | [diff] [blame] | 1611 | request->initiator = NL80211_REGDOM_SET_BY_USER; |
Luis R. Rodriguez | fe33eb3 | 2009-02-21 00:04:30 -0500 | [diff] [blame] | 1612 | |
| 1613 | queue_regulatory_request(request); |
| 1614 | |
| 1615 | return 0; |
| 1616 | } |
| 1617 | |
| 1618 | /* Driver hints */ |
| 1619 | int regulatory_hint(struct wiphy *wiphy, const char *alpha2) |
| 1620 | { |
| 1621 | struct regulatory_request *request; |
| 1622 | |
| 1623 | BUG_ON(!alpha2); |
| 1624 | BUG_ON(!wiphy); |
| 1625 | |
| 1626 | request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); |
| 1627 | if (!request) |
| 1628 | return -ENOMEM; |
| 1629 | |
| 1630 | request->wiphy_idx = get_wiphy_idx(wiphy); |
| 1631 | |
| 1632 | /* Must have registered wiphy first */ |
| 1633 | BUG_ON(!wiphy_idx_valid(request->wiphy_idx)); |
| 1634 | |
| 1635 | request->alpha2[0] = alpha2[0]; |
| 1636 | request->alpha2[1] = alpha2[1]; |
Luis R. Rodriguez | 7db90f4 | 2009-03-09 22:07:41 -0400 | [diff] [blame] | 1637 | request->initiator = NL80211_REGDOM_SET_BY_DRIVER; |
Luis R. Rodriguez | fe33eb3 | 2009-02-21 00:04:30 -0500 | [diff] [blame] | 1638 | |
| 1639 | queue_regulatory_request(request); |
| 1640 | |
| 1641 | return 0; |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 1642 | } |
| 1643 | EXPORT_SYMBOL(regulatory_hint); |
| 1644 | |
Luis R. Rodriguez | 4b44c8b | 2009-07-30 17:38:07 -0700 | [diff] [blame] | 1645 | /* |
| 1646 | * We hold wdev_lock() here so we cannot hold cfg80211_mutex() and |
| 1647 | * therefore cannot iterate over the rdev list here. |
| 1648 | */ |
Luis R. Rodriguez | 3f2355c | 2008-11-12 14:22:02 -0800 | [diff] [blame] | 1649 | void regulatory_hint_11d(struct wiphy *wiphy, |
Luis R. Rodriguez | 84920e3 | 2010-01-14 20:08:20 -0500 | [diff] [blame] | 1650 | enum ieee80211_band band, |
| 1651 | u8 *country_ie, |
| 1652 | u8 country_ie_len) |
Luis R. Rodriguez | 3f2355c | 2008-11-12 14:22:02 -0800 | [diff] [blame] | 1653 | { |
Luis R. Rodriguez | 3f2355c | 2008-11-12 14:22:02 -0800 | [diff] [blame] | 1654 | char alpha2[2]; |
Luis R. Rodriguez | 3f2355c | 2008-11-12 14:22:02 -0800 | [diff] [blame] | 1655 | enum environment_cap env = ENVIRON_ANY; |
Luis R. Rodriguez | fe33eb3 | 2009-02-21 00:04:30 -0500 | [diff] [blame] | 1656 | struct regulatory_request *request; |
Luis R. Rodriguez | 3f2355c | 2008-11-12 14:22:02 -0800 | [diff] [blame] | 1657 | |
Luis R. Rodriguez | abc7381 | 2009-07-30 17:38:08 -0700 | [diff] [blame] | 1658 | mutex_lock(®_mutex); |
Luis R. Rodriguez | 3f2355c | 2008-11-12 14:22:02 -0800 | [diff] [blame] | 1659 | |
Luis R. Rodriguez | 9828b01 | 2009-07-30 17:38:06 -0700 | [diff] [blame] | 1660 | if (unlikely(!last_request)) |
| 1661 | goto out; |
Luis R. Rodriguez | d335fe6 | 2009-02-21 00:04:27 -0500 | [diff] [blame] | 1662 | |
Luis R. Rodriguez | 3f2355c | 2008-11-12 14:22:02 -0800 | [diff] [blame] | 1663 | /* IE len must be evenly divisible by 2 */ |
| 1664 | if (country_ie_len & 0x01) |
| 1665 | goto out; |
| 1666 | |
| 1667 | if (country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN) |
| 1668 | goto out; |
| 1669 | |
Luis R. Rodriguez | 3f2355c | 2008-11-12 14:22:02 -0800 | [diff] [blame] | 1670 | alpha2[0] = country_ie[0]; |
| 1671 | alpha2[1] = country_ie[1]; |
| 1672 | |
| 1673 | if (country_ie[2] == 'I') |
| 1674 | env = ENVIRON_INDOOR; |
| 1675 | else if (country_ie[2] == 'O') |
| 1676 | env = ENVIRON_OUTDOOR; |
| 1677 | |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 1678 | /* |
Luis R. Rodriguez | 8b19e6c | 2009-07-30 17:38:09 -0700 | [diff] [blame] | 1679 | * We will run this only upon a successful connection on cfg80211. |
Luis R. Rodriguez | 4b44c8b | 2009-07-30 17:38:07 -0700 | [diff] [blame] | 1680 | * We leave conflict resolution to the workqueue, where can hold |
| 1681 | * cfg80211_mutex. |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 1682 | */ |
Luis R. Rodriguez | cc0b6fe | 2009-03-20 23:53:05 -0400 | [diff] [blame] | 1683 | if (likely(last_request->initiator == |
| 1684 | NL80211_REGDOM_SET_BY_COUNTRY_IE && |
Luis R. Rodriguez | 4b44c8b | 2009-07-30 17:38:07 -0700 | [diff] [blame] | 1685 | wiphy_idx_valid(last_request->wiphy_idx))) |
| 1686 | goto out; |
Luis R. Rodriguez | 3f2355c | 2008-11-12 14:22:02 -0800 | [diff] [blame] | 1687 | |
Luis R. Rodriguez | fe33eb3 | 2009-02-21 00:04:30 -0500 | [diff] [blame] | 1688 | request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); |
| 1689 | if (!request) |
Dan Carpenter | f9f9b6e | 2010-07-22 13:26:50 +0200 | [diff] [blame] | 1690 | goto out; |
Luis R. Rodriguez | fe33eb3 | 2009-02-21 00:04:30 -0500 | [diff] [blame] | 1691 | |
Luis R. Rodriguez | fe33eb3 | 2009-02-21 00:04:30 -0500 | [diff] [blame] | 1692 | request->wiphy_idx = get_wiphy_idx(wiphy); |
John W. Linville | 4f366c5 | 2010-07-15 14:57:33 -0400 | [diff] [blame] | 1693 | request->alpha2[0] = alpha2[0]; |
| 1694 | request->alpha2[1] = alpha2[1]; |
Luis R. Rodriguez | 7db90f4 | 2009-03-09 22:07:41 -0400 | [diff] [blame] | 1695 | request->initiator = NL80211_REGDOM_SET_BY_COUNTRY_IE; |
Luis R. Rodriguez | fe33eb3 | 2009-02-21 00:04:30 -0500 | [diff] [blame] | 1696 | request->country_ie_env = env; |
Luis R. Rodriguez | 3f2355c | 2008-11-12 14:22:02 -0800 | [diff] [blame] | 1697 | |
Luis R. Rodriguez | abc7381 | 2009-07-30 17:38:08 -0700 | [diff] [blame] | 1698 | mutex_unlock(®_mutex); |
Luis R. Rodriguez | fe33eb3 | 2009-02-21 00:04:30 -0500 | [diff] [blame] | 1699 | |
| 1700 | queue_regulatory_request(request); |
| 1701 | |
| 1702 | return; |
Luis R. Rodriguez | 0441d6f | 2009-02-21 00:04:29 -0500 | [diff] [blame] | 1703 | |
Luis R. Rodriguez | 3f2355c | 2008-11-12 14:22:02 -0800 | [diff] [blame] | 1704 | out: |
Luis R. Rodriguez | abc7381 | 2009-07-30 17:38:08 -0700 | [diff] [blame] | 1705 | mutex_unlock(®_mutex); |
Luis R. Rodriguez | 3f2355c | 2008-11-12 14:22:02 -0800 | [diff] [blame] | 1706 | } |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 1707 | |
Luis R. Rodriguez | 09d989d | 2010-01-29 19:58:57 -0500 | [diff] [blame] | 1708 | static void restore_alpha2(char *alpha2, bool reset_user) |
| 1709 | { |
| 1710 | /* indicates there is no alpha2 to consider for restoration */ |
| 1711 | alpha2[0] = '9'; |
| 1712 | alpha2[1] = '7'; |
| 1713 | |
| 1714 | /* The user setting has precedence over the module parameter */ |
| 1715 | if (is_user_regdom_saved()) { |
| 1716 | /* Unless we're asked to ignore it and reset it */ |
| 1717 | if (reset_user) { |
Luis R. Rodriguez | d91e41b | 2010-10-20 10:18:59 -0700 | [diff] [blame] | 1718 | REG_DBG_PRINT("Restoring regulatory settings " |
Luis R. Rodriguez | 09d989d | 2010-01-29 19:58:57 -0500 | [diff] [blame] | 1719 | "including user preference\n"); |
| 1720 | user_alpha2[0] = '9'; |
| 1721 | user_alpha2[1] = '7'; |
| 1722 | |
| 1723 | /* |
| 1724 | * If we're ignoring user settings, we still need to |
| 1725 | * check the module parameter to ensure we put things |
| 1726 | * back as they were for a full restore. |
| 1727 | */ |
| 1728 | if (!is_world_regdom(ieee80211_regdom)) { |
Luis R. Rodriguez | d91e41b | 2010-10-20 10:18:59 -0700 | [diff] [blame] | 1729 | REG_DBG_PRINT("Keeping preference on " |
Luis R. Rodriguez | 09d989d | 2010-01-29 19:58:57 -0500 | [diff] [blame] | 1730 | "module parameter ieee80211_regdom: %c%c\n", |
| 1731 | ieee80211_regdom[0], |
| 1732 | ieee80211_regdom[1]); |
| 1733 | alpha2[0] = ieee80211_regdom[0]; |
| 1734 | alpha2[1] = ieee80211_regdom[1]; |
| 1735 | } |
| 1736 | } else { |
Luis R. Rodriguez | d91e41b | 2010-10-20 10:18:59 -0700 | [diff] [blame] | 1737 | REG_DBG_PRINT("Restoring regulatory settings " |
Luis R. Rodriguez | 09d989d | 2010-01-29 19:58:57 -0500 | [diff] [blame] | 1738 | "while preserving user preference for: %c%c\n", |
| 1739 | user_alpha2[0], |
| 1740 | user_alpha2[1]); |
| 1741 | alpha2[0] = user_alpha2[0]; |
| 1742 | alpha2[1] = user_alpha2[1]; |
| 1743 | } |
| 1744 | } else if (!is_world_regdom(ieee80211_regdom)) { |
Luis R. Rodriguez | d91e41b | 2010-10-20 10:18:59 -0700 | [diff] [blame] | 1745 | REG_DBG_PRINT("Keeping preference on " |
Luis R. Rodriguez | 09d989d | 2010-01-29 19:58:57 -0500 | [diff] [blame] | 1746 | "module parameter ieee80211_regdom: %c%c\n", |
| 1747 | ieee80211_regdom[0], |
| 1748 | ieee80211_regdom[1]); |
| 1749 | alpha2[0] = ieee80211_regdom[0]; |
| 1750 | alpha2[1] = ieee80211_regdom[1]; |
| 1751 | } else |
Luis R. Rodriguez | d91e41b | 2010-10-20 10:18:59 -0700 | [diff] [blame] | 1752 | REG_DBG_PRINT("Restoring regulatory settings\n"); |
Luis R. Rodriguez | 09d989d | 2010-01-29 19:58:57 -0500 | [diff] [blame] | 1753 | } |
| 1754 | |
| 1755 | /* |
| 1756 | * Restoring regulatory settings involves ingoring any |
| 1757 | * possibly stale country IE information and user regulatory |
| 1758 | * settings if so desired, this includes any beacon hints |
| 1759 | * learned as we could have traveled outside to another country |
| 1760 | * after disconnection. To restore regulatory settings we do |
| 1761 | * exactly what we did at bootup: |
| 1762 | * |
| 1763 | * - send a core regulatory hint |
| 1764 | * - send a user regulatory hint if applicable |
| 1765 | * |
| 1766 | * Device drivers that send a regulatory hint for a specific country |
| 1767 | * keep their own regulatory domain on wiphy->regd so that does does |
| 1768 | * not need to be remembered. |
| 1769 | */ |
| 1770 | static void restore_regulatory_settings(bool reset_user) |
| 1771 | { |
| 1772 | char alpha2[2]; |
| 1773 | struct reg_beacon *reg_beacon, *btmp; |
Luis R. Rodriguez | 1460955 | 2011-04-05 10:49:03 -0700 | [diff] [blame] | 1774 | struct regulatory_request *reg_request, *tmp; |
| 1775 | LIST_HEAD(tmp_reg_req_list); |
Luis R. Rodriguez | 09d989d | 2010-01-29 19:58:57 -0500 | [diff] [blame] | 1776 | |
| 1777 | mutex_lock(&cfg80211_mutex); |
| 1778 | mutex_lock(®_mutex); |
| 1779 | |
| 1780 | reset_regdomains(); |
| 1781 | restore_alpha2(alpha2, reset_user); |
| 1782 | |
Luis R. Rodriguez | 1460955 | 2011-04-05 10:49:03 -0700 | [diff] [blame] | 1783 | /* |
| 1784 | * If there's any pending requests we simply |
| 1785 | * stash them to a temporary pending queue and |
| 1786 | * add then after we've restored regulatory |
| 1787 | * settings. |
| 1788 | */ |
| 1789 | spin_lock(®_requests_lock); |
| 1790 | if (!list_empty(®_requests_list)) { |
| 1791 | list_for_each_entry_safe(reg_request, tmp, |
| 1792 | ®_requests_list, list) { |
| 1793 | if (reg_request->initiator != |
| 1794 | NL80211_REGDOM_SET_BY_USER) |
| 1795 | continue; |
| 1796 | list_del(®_request->list); |
| 1797 | list_add_tail(®_request->list, &tmp_reg_req_list); |
| 1798 | } |
| 1799 | } |
| 1800 | spin_unlock(®_requests_lock); |
| 1801 | |
Luis R. Rodriguez | 09d989d | 2010-01-29 19:58:57 -0500 | [diff] [blame] | 1802 | /* Clear beacon hints */ |
| 1803 | spin_lock_bh(®_pending_beacons_lock); |
| 1804 | if (!list_empty(®_pending_beacons)) { |
| 1805 | list_for_each_entry_safe(reg_beacon, btmp, |
| 1806 | ®_pending_beacons, list) { |
| 1807 | list_del(®_beacon->list); |
| 1808 | kfree(reg_beacon); |
| 1809 | } |
| 1810 | } |
| 1811 | spin_unlock_bh(®_pending_beacons_lock); |
| 1812 | |
| 1813 | if (!list_empty(®_beacon_list)) { |
| 1814 | list_for_each_entry_safe(reg_beacon, btmp, |
| 1815 | ®_beacon_list, list) { |
| 1816 | list_del(®_beacon->list); |
| 1817 | kfree(reg_beacon); |
| 1818 | } |
| 1819 | } |
| 1820 | |
| 1821 | /* First restore to the basic regulatory settings */ |
| 1822 | cfg80211_regdomain = cfg80211_world_regdom; |
| 1823 | |
| 1824 | mutex_unlock(®_mutex); |
| 1825 | mutex_unlock(&cfg80211_mutex); |
| 1826 | |
| 1827 | regulatory_hint_core(cfg80211_regdomain->alpha2); |
| 1828 | |
| 1829 | /* |
| 1830 | * This restores the ieee80211_regdom module parameter |
| 1831 | * preference or the last user requested regulatory |
| 1832 | * settings, user regulatory settings takes precedence. |
| 1833 | */ |
| 1834 | if (is_an_alpha2(alpha2)) |
| 1835 | regulatory_hint_user(user_alpha2); |
Luis R. Rodriguez | 09d989d | 2010-01-29 19:58:57 -0500 | [diff] [blame] | 1836 | |
Luis R. Rodriguez | 1460955 | 2011-04-05 10:49:03 -0700 | [diff] [blame] | 1837 | if (list_empty(&tmp_reg_req_list)) |
| 1838 | return; |
| 1839 | |
| 1840 | mutex_lock(&cfg80211_mutex); |
| 1841 | mutex_lock(®_mutex); |
| 1842 | |
| 1843 | spin_lock(®_requests_lock); |
| 1844 | list_for_each_entry_safe(reg_request, tmp, &tmp_reg_req_list, list) { |
| 1845 | REG_DBG_PRINT("Adding request for country %c%c back " |
| 1846 | "into the queue\n", |
| 1847 | reg_request->alpha2[0], |
| 1848 | reg_request->alpha2[1]); |
| 1849 | list_del(®_request->list); |
| 1850 | list_add_tail(®_request->list, ®_requests_list); |
| 1851 | } |
| 1852 | spin_unlock(®_requests_lock); |
| 1853 | |
| 1854 | mutex_unlock(®_mutex); |
| 1855 | mutex_unlock(&cfg80211_mutex); |
| 1856 | |
| 1857 | REG_DBG_PRINT("Kicking the queue\n"); |
| 1858 | |
| 1859 | schedule_work(®_work); |
| 1860 | } |
Luis R. Rodriguez | 09d989d | 2010-01-29 19:58:57 -0500 | [diff] [blame] | 1861 | |
| 1862 | void regulatory_hint_disconnect(void) |
| 1863 | { |
Luis R. Rodriguez | d91e41b | 2010-10-20 10:18:59 -0700 | [diff] [blame] | 1864 | REG_DBG_PRINT("All devices are disconnected, going to " |
Luis R. Rodriguez | 09d989d | 2010-01-29 19:58:57 -0500 | [diff] [blame] | 1865 | "restore regulatory settings\n"); |
| 1866 | restore_regulatory_settings(false); |
| 1867 | } |
| 1868 | |
Luis R. Rodriguez | e38f8a7 | 2009-02-21 00:20:39 -0500 | [diff] [blame] | 1869 | static bool freq_is_chan_12_13_14(u16 freq) |
| 1870 | { |
Bruno Randolf | 59eb21a | 2011-01-17 13:37:28 +0900 | [diff] [blame] | 1871 | if (freq == ieee80211_channel_to_frequency(12, IEEE80211_BAND_2GHZ) || |
| 1872 | freq == ieee80211_channel_to_frequency(13, IEEE80211_BAND_2GHZ) || |
| 1873 | freq == ieee80211_channel_to_frequency(14, IEEE80211_BAND_2GHZ)) |
Luis R. Rodriguez | e38f8a7 | 2009-02-21 00:20:39 -0500 | [diff] [blame] | 1874 | return true; |
| 1875 | return false; |
| 1876 | } |
| 1877 | |
| 1878 | int regulatory_hint_found_beacon(struct wiphy *wiphy, |
| 1879 | struct ieee80211_channel *beacon_chan, |
| 1880 | gfp_t gfp) |
| 1881 | { |
| 1882 | struct reg_beacon *reg_beacon; |
| 1883 | |
| 1884 | if (likely((beacon_chan->beacon_found || |
| 1885 | (beacon_chan->flags & IEEE80211_CHAN_RADAR) || |
| 1886 | (beacon_chan->band == IEEE80211_BAND_2GHZ && |
| 1887 | !freq_is_chan_12_13_14(beacon_chan->center_freq))))) |
| 1888 | return 0; |
| 1889 | |
| 1890 | reg_beacon = kzalloc(sizeof(struct reg_beacon), gfp); |
| 1891 | if (!reg_beacon) |
| 1892 | return -ENOMEM; |
| 1893 | |
Luis R. Rodriguez | d91e41b | 2010-10-20 10:18:59 -0700 | [diff] [blame] | 1894 | REG_DBG_PRINT("Found new beacon on " |
Luis R. Rodriguez | 4113f75 | 2010-01-04 11:50:11 -0500 | [diff] [blame] | 1895 | "frequency: %d MHz (Ch %d) on %s\n", |
| 1896 | beacon_chan->center_freq, |
| 1897 | ieee80211_frequency_to_channel(beacon_chan->center_freq), |
| 1898 | wiphy_name(wiphy)); |
| 1899 | |
Luis R. Rodriguez | e38f8a7 | 2009-02-21 00:20:39 -0500 | [diff] [blame] | 1900 | memcpy(®_beacon->chan, beacon_chan, |
| 1901 | sizeof(struct ieee80211_channel)); |
| 1902 | |
| 1903 | |
| 1904 | /* |
| 1905 | * Since we can be called from BH or and non-BH context |
| 1906 | * we must use spin_lock_bh() |
| 1907 | */ |
| 1908 | spin_lock_bh(®_pending_beacons_lock); |
| 1909 | list_add_tail(®_beacon->list, ®_pending_beacons); |
| 1910 | spin_unlock_bh(®_pending_beacons_lock); |
| 1911 | |
| 1912 | schedule_work(®_work); |
| 1913 | |
| 1914 | return 0; |
| 1915 | } |
| 1916 | |
Johannes Berg | a3d2eaf | 2008-09-15 11:10:52 +0200 | [diff] [blame] | 1917 | static void print_rd_rules(const struct ieee80211_regdomain *rd) |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 1918 | { |
| 1919 | unsigned int i; |
Johannes Berg | a3d2eaf | 2008-09-15 11:10:52 +0200 | [diff] [blame] | 1920 | const struct ieee80211_reg_rule *reg_rule = NULL; |
| 1921 | const struct ieee80211_freq_range *freq_range = NULL; |
| 1922 | const struct ieee80211_power_rule *power_rule = NULL; |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 1923 | |
Joe Perches | e9c0268 | 2010-11-16 19:56:49 -0800 | [diff] [blame] | 1924 | pr_info(" (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)\n"); |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 1925 | |
| 1926 | for (i = 0; i < rd->n_reg_rules; i++) { |
| 1927 | reg_rule = &rd->reg_rules[i]; |
| 1928 | freq_range = ®_rule->freq_range; |
| 1929 | power_rule = ®_rule->power_rule; |
| 1930 | |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 1931 | /* |
| 1932 | * There may not be documentation for max antenna gain |
| 1933 | * in certain regions |
| 1934 | */ |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 1935 | if (power_rule->max_antenna_gain) |
Joe Perches | e9c0268 | 2010-11-16 19:56:49 -0800 | [diff] [blame] | 1936 | pr_info(" (%d KHz - %d KHz @ %d KHz), (%d mBi, %d mBm)\n", |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 1937 | freq_range->start_freq_khz, |
| 1938 | freq_range->end_freq_khz, |
| 1939 | freq_range->max_bandwidth_khz, |
| 1940 | power_rule->max_antenna_gain, |
| 1941 | power_rule->max_eirp); |
| 1942 | else |
Joe Perches | e9c0268 | 2010-11-16 19:56:49 -0800 | [diff] [blame] | 1943 | pr_info(" (%d KHz - %d KHz @ %d KHz), (N/A, %d mBm)\n", |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 1944 | freq_range->start_freq_khz, |
| 1945 | freq_range->end_freq_khz, |
| 1946 | freq_range->max_bandwidth_khz, |
| 1947 | power_rule->max_eirp); |
| 1948 | } |
| 1949 | } |
| 1950 | |
Luis R. Rodriguez | 8b60b07 | 2011-10-11 10:59:02 -0700 | [diff] [blame] | 1951 | bool reg_supported_dfs_region(u8 dfs_region) |
| 1952 | { |
| 1953 | switch (dfs_region) { |
| 1954 | case NL80211_DFS_UNSET: |
| 1955 | case NL80211_DFS_FCC: |
| 1956 | case NL80211_DFS_ETSI: |
| 1957 | case NL80211_DFS_JP: |
| 1958 | return true; |
| 1959 | default: |
| 1960 | REG_DBG_PRINT("Ignoring uknown DFS master region: %d\n", |
| 1961 | dfs_region); |
| 1962 | return false; |
| 1963 | } |
| 1964 | } |
| 1965 | |
| 1966 | static void print_dfs_region(u8 dfs_region) |
| 1967 | { |
| 1968 | if (!dfs_region) |
| 1969 | return; |
| 1970 | |
| 1971 | switch (dfs_region) { |
| 1972 | case NL80211_DFS_FCC: |
| 1973 | pr_info(" DFS Master region FCC"); |
| 1974 | break; |
| 1975 | case NL80211_DFS_ETSI: |
| 1976 | pr_info(" DFS Master region ETSI"); |
| 1977 | break; |
| 1978 | case NL80211_DFS_JP: |
| 1979 | pr_info(" DFS Master region JP"); |
| 1980 | break; |
| 1981 | default: |
| 1982 | pr_info(" DFS Master region Uknown"); |
| 1983 | break; |
| 1984 | } |
| 1985 | } |
| 1986 | |
Johannes Berg | a3d2eaf | 2008-09-15 11:10:52 +0200 | [diff] [blame] | 1987 | static void print_regdomain(const struct ieee80211_regdomain *rd) |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 1988 | { |
| 1989 | |
Luis R. Rodriguez | 3f2355c | 2008-11-12 14:22:02 -0800 | [diff] [blame] | 1990 | if (is_intersected_alpha2(rd->alpha2)) { |
Luis R. Rodriguez | 3f2355c | 2008-11-12 14:22:02 -0800 | [diff] [blame] | 1991 | |
Luis R. Rodriguez | 7db90f4 | 2009-03-09 22:07:41 -0400 | [diff] [blame] | 1992 | if (last_request->initiator == |
| 1993 | NL80211_REGDOM_SET_BY_COUNTRY_IE) { |
Johannes Berg | 79c97e9 | 2009-07-07 03:56:12 +0200 | [diff] [blame] | 1994 | struct cfg80211_registered_device *rdev; |
| 1995 | rdev = cfg80211_rdev_by_wiphy_idx( |
Luis R. Rodriguez | 806a9e3 | 2009-02-21 00:04:26 -0500 | [diff] [blame] | 1996 | last_request->wiphy_idx); |
Johannes Berg | 79c97e9 | 2009-07-07 03:56:12 +0200 | [diff] [blame] | 1997 | if (rdev) { |
Joe Perches | e9c0268 | 2010-11-16 19:56:49 -0800 | [diff] [blame] | 1998 | pr_info("Current regulatory domain updated by AP to: %c%c\n", |
Johannes Berg | 79c97e9 | 2009-07-07 03:56:12 +0200 | [diff] [blame] | 1999 | rdev->country_ie_alpha2[0], |
| 2000 | rdev->country_ie_alpha2[1]); |
Luis R. Rodriguez | 3f2355c | 2008-11-12 14:22:02 -0800 | [diff] [blame] | 2001 | } else |
Joe Perches | e9c0268 | 2010-11-16 19:56:49 -0800 | [diff] [blame] | 2002 | pr_info("Current regulatory domain intersected:\n"); |
Luis R. Rodriguez | 3f2355c | 2008-11-12 14:22:02 -0800 | [diff] [blame] | 2003 | } else |
Joe Perches | e9c0268 | 2010-11-16 19:56:49 -0800 | [diff] [blame] | 2004 | pr_info("Current regulatory domain intersected:\n"); |
Luis R. Rodriguez | 3f2355c | 2008-11-12 14:22:02 -0800 | [diff] [blame] | 2005 | } else if (is_world_regdom(rd->alpha2)) |
Joe Perches | e9c0268 | 2010-11-16 19:56:49 -0800 | [diff] [blame] | 2006 | pr_info("World regulatory domain updated:\n"); |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 2007 | else { |
| 2008 | if (is_unknown_alpha2(rd->alpha2)) |
Joe Perches | e9c0268 | 2010-11-16 19:56:49 -0800 | [diff] [blame] | 2009 | pr_info("Regulatory domain changed to driver built-in settings (unknown country)\n"); |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 2010 | else |
Joe Perches | e9c0268 | 2010-11-16 19:56:49 -0800 | [diff] [blame] | 2011 | pr_info("Regulatory domain changed to country: %c%c\n", |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 2012 | rd->alpha2[0], rd->alpha2[1]); |
| 2013 | } |
Luis R. Rodriguez | 8b60b07 | 2011-10-11 10:59:02 -0700 | [diff] [blame] | 2014 | print_dfs_region(rd->dfs_region); |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 2015 | print_rd_rules(rd); |
| 2016 | } |
| 2017 | |
Johannes Berg | 2df7816 | 2008-10-28 16:49:41 +0100 | [diff] [blame] | 2018 | static void print_regdomain_info(const struct ieee80211_regdomain *rd) |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 2019 | { |
Joe Perches | e9c0268 | 2010-11-16 19:56:49 -0800 | [diff] [blame] | 2020 | pr_info("Regulatory domain: %c%c\n", rd->alpha2[0], rd->alpha2[1]); |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 2021 | print_rd_rules(rd); |
| 2022 | } |
| 2023 | |
Johannes Berg | d2372b3 | 2008-10-24 20:32:20 +0200 | [diff] [blame] | 2024 | /* Takes ownership of rd only if it doesn't fail */ |
Johannes Berg | a3d2eaf | 2008-09-15 11:10:52 +0200 | [diff] [blame] | 2025 | static int __set_regdom(const struct ieee80211_regdomain *rd) |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 2026 | { |
Luis R. Rodriguez | 9c96477 | 2008-10-30 13:33:53 -0700 | [diff] [blame] | 2027 | const struct ieee80211_regdomain *intersected_rd = NULL; |
Johannes Berg | 79c97e9 | 2009-07-07 03:56:12 +0200 | [diff] [blame] | 2028 | struct cfg80211_registered_device *rdev = NULL; |
Luis R. Rodriguez | 806a9e3 | 2009-02-21 00:04:26 -0500 | [diff] [blame] | 2029 | struct wiphy *request_wiphy; |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 2030 | /* Some basic sanity checks first */ |
| 2031 | |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 2032 | if (is_world_regdom(rd->alpha2)) { |
Johannes Berg | f6037d0 | 2008-10-21 11:01:33 +0200 | [diff] [blame] | 2033 | if (WARN_ON(!reg_is_valid_request(rd->alpha2))) |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 2034 | return -EINVAL; |
| 2035 | update_world_regdomain(rd); |
| 2036 | return 0; |
| 2037 | } |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 2038 | |
| 2039 | if (!is_alpha2_set(rd->alpha2) && !is_an_alpha2(rd->alpha2) && |
| 2040 | !is_unknown_alpha2(rd->alpha2)) |
| 2041 | return -EINVAL; |
| 2042 | |
Johannes Berg | f6037d0 | 2008-10-21 11:01:33 +0200 | [diff] [blame] | 2043 | if (!last_request) |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 2044 | return -EINVAL; |
| 2045 | |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 2046 | /* |
| 2047 | * Lets only bother proceeding on the same alpha2 if the current |
Luis R. Rodriguez | 3f2355c | 2008-11-12 14:22:02 -0800 | [diff] [blame] | 2048 | * rd is non static (it means CRDA was present and was used last) |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 2049 | * and the pending request came in from a country IE |
| 2050 | */ |
Luis R. Rodriguez | 7db90f4 | 2009-03-09 22:07:41 -0400 | [diff] [blame] | 2051 | if (last_request->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE) { |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 2052 | /* |
| 2053 | * If someone else asked us to change the rd lets only bother |
| 2054 | * checking if the alpha2 changes if CRDA was already called |
| 2055 | */ |
John W. Linville | baeb66f | 2009-12-18 17:59:02 -0500 | [diff] [blame] | 2056 | if (!regdom_changes(rd->alpha2)) |
Luis R. Rodriguez | 3f2355c | 2008-11-12 14:22:02 -0800 | [diff] [blame] | 2057 | return -EINVAL; |
| 2058 | } |
| 2059 | |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 2060 | /* |
| 2061 | * Now lets set the regulatory domain, update all driver channels |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 2062 | * and finally inform them of what we have done, in case they want |
| 2063 | * to review or adjust their own settings based on their own |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 2064 | * internal EEPROM data |
| 2065 | */ |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 2066 | |
Johannes Berg | f6037d0 | 2008-10-21 11:01:33 +0200 | [diff] [blame] | 2067 | if (WARN_ON(!reg_is_valid_request(rd->alpha2))) |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 2068 | return -EINVAL; |
| 2069 | |
Luis R. Rodriguez | 8375af3 | 2008-11-12 14:21:57 -0800 | [diff] [blame] | 2070 | if (!is_valid_rd(rd)) { |
Joe Perches | e9c0268 | 2010-11-16 19:56:49 -0800 | [diff] [blame] | 2071 | pr_err("Invalid regulatory domain detected:\n"); |
Luis R. Rodriguez | 8375af3 | 2008-11-12 14:21:57 -0800 | [diff] [blame] | 2072 | print_regdomain_info(rd); |
| 2073 | return -EINVAL; |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 2074 | } |
| 2075 | |
Luis R. Rodriguez | 806a9e3 | 2009-02-21 00:04:26 -0500 | [diff] [blame] | 2076 | request_wiphy = wiphy_idx_to_wiphy(last_request->wiphy_idx); |
| 2077 | |
Luis R. Rodriguez | b8295ac | 2008-11-12 14:21:58 -0800 | [diff] [blame] | 2078 | if (!last_request->intersect) { |
Luis R. Rodriguez | 3e0c3ff | 2009-01-07 17:43:34 -0800 | [diff] [blame] | 2079 | int r; |
| 2080 | |
Luis R. Rodriguez | 7db90f4 | 2009-03-09 22:07:41 -0400 | [diff] [blame] | 2081 | if (last_request->initiator != NL80211_REGDOM_SET_BY_DRIVER) { |
Luis R. Rodriguez | 3e0c3ff | 2009-01-07 17:43:34 -0800 | [diff] [blame] | 2082 | reset_regdomains(); |
| 2083 | cfg80211_regdomain = rd; |
| 2084 | return 0; |
| 2085 | } |
| 2086 | |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 2087 | /* |
| 2088 | * For a driver hint, lets copy the regulatory domain the |
| 2089 | * driver wanted to the wiphy to deal with conflicts |
| 2090 | */ |
Luis R. Rodriguez | 3e0c3ff | 2009-01-07 17:43:34 -0800 | [diff] [blame] | 2091 | |
Luis R. Rodriguez | 558f6d3 | 2009-06-08 18:54:37 -0700 | [diff] [blame] | 2092 | /* |
| 2093 | * Userspace could have sent two replies with only |
| 2094 | * one kernel request. |
| 2095 | */ |
| 2096 | if (request_wiphy->regd) |
| 2097 | return -EALREADY; |
Luis R. Rodriguez | 3e0c3ff | 2009-01-07 17:43:34 -0800 | [diff] [blame] | 2098 | |
Luis R. Rodriguez | 806a9e3 | 2009-02-21 00:04:26 -0500 | [diff] [blame] | 2099 | r = reg_copy_regd(&request_wiphy->regd, rd); |
Luis R. Rodriguez | 3e0c3ff | 2009-01-07 17:43:34 -0800 | [diff] [blame] | 2100 | if (r) |
| 2101 | return r; |
| 2102 | |
Luis R. Rodriguez | b8295ac | 2008-11-12 14:21:58 -0800 | [diff] [blame] | 2103 | reset_regdomains(); |
| 2104 | cfg80211_regdomain = rd; |
| 2105 | return 0; |
| 2106 | } |
| 2107 | |
| 2108 | /* Intersection requires a bit more work */ |
| 2109 | |
Luis R. Rodriguez | 7db90f4 | 2009-03-09 22:07:41 -0400 | [diff] [blame] | 2110 | if (last_request->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE) { |
Luis R. Rodriguez | b8295ac | 2008-11-12 14:21:58 -0800 | [diff] [blame] | 2111 | |
Luis R. Rodriguez | 9c96477 | 2008-10-30 13:33:53 -0700 | [diff] [blame] | 2112 | intersected_rd = regdom_intersect(rd, cfg80211_regdomain); |
| 2113 | if (!intersected_rd) |
| 2114 | return -EINVAL; |
Luis R. Rodriguez | b8295ac | 2008-11-12 14:21:58 -0800 | [diff] [blame] | 2115 | |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 2116 | /* |
| 2117 | * We can trash what CRDA provided now. |
Luis R. Rodriguez | 3e0c3ff | 2009-01-07 17:43:34 -0800 | [diff] [blame] | 2118 | * However if a driver requested this specific regulatory |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 2119 | * domain we keep it for its private use |
| 2120 | */ |
Luis R. Rodriguez | 7db90f4 | 2009-03-09 22:07:41 -0400 | [diff] [blame] | 2121 | if (last_request->initiator == NL80211_REGDOM_SET_BY_DRIVER) |
Luis R. Rodriguez | 806a9e3 | 2009-02-21 00:04:26 -0500 | [diff] [blame] | 2122 | request_wiphy->regd = rd; |
Luis R. Rodriguez | 3e0c3ff | 2009-01-07 17:43:34 -0800 | [diff] [blame] | 2123 | else |
| 2124 | kfree(rd); |
| 2125 | |
Luis R. Rodriguez | b8295ac | 2008-11-12 14:21:58 -0800 | [diff] [blame] | 2126 | rd = NULL; |
| 2127 | |
| 2128 | reset_regdomains(); |
| 2129 | cfg80211_regdomain = intersected_rd; |
| 2130 | |
| 2131 | return 0; |
Luis R. Rodriguez | 9c96477 | 2008-10-30 13:33:53 -0700 | [diff] [blame] | 2132 | } |
| 2133 | |
Luis R. Rodriguez | 3f2355c | 2008-11-12 14:22:02 -0800 | [diff] [blame] | 2134 | if (!intersected_rd) |
| 2135 | return -EINVAL; |
| 2136 | |
Johannes Berg | 79c97e9 | 2009-07-07 03:56:12 +0200 | [diff] [blame] | 2137 | rdev = wiphy_to_dev(request_wiphy); |
Luis R. Rodriguez | 3f2355c | 2008-11-12 14:22:02 -0800 | [diff] [blame] | 2138 | |
Johannes Berg | 79c97e9 | 2009-07-07 03:56:12 +0200 | [diff] [blame] | 2139 | rdev->country_ie_alpha2[0] = rd->alpha2[0]; |
| 2140 | rdev->country_ie_alpha2[1] = rd->alpha2[1]; |
| 2141 | rdev->env = last_request->country_ie_env; |
Luis R. Rodriguez | 3f2355c | 2008-11-12 14:22:02 -0800 | [diff] [blame] | 2142 | |
| 2143 | BUG_ON(intersected_rd == rd); |
| 2144 | |
| 2145 | kfree(rd); |
| 2146 | rd = NULL; |
| 2147 | |
Luis R. Rodriguez | b8295ac | 2008-11-12 14:21:58 -0800 | [diff] [blame] | 2148 | reset_regdomains(); |
Luis R. Rodriguez | 3f2355c | 2008-11-12 14:22:02 -0800 | [diff] [blame] | 2149 | cfg80211_regdomain = intersected_rd; |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 2150 | |
| 2151 | return 0; |
| 2152 | } |
| 2153 | |
| 2154 | |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 2155 | /* |
| 2156 | * Use this call to set the current regulatory domain. Conflicts with |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 2157 | * multiple drivers can be ironed out later. Caller must've already |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 2158 | * kmalloc'd the rd structure. Caller must hold cfg80211_mutex |
| 2159 | */ |
Johannes Berg | a3d2eaf | 2008-09-15 11:10:52 +0200 | [diff] [blame] | 2160 | int set_regdom(const struct ieee80211_regdomain *rd) |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 2161 | { |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 2162 | int r; |
| 2163 | |
Luis R. Rodriguez | 761cf7e | 2009-02-21 00:04:25 -0500 | [diff] [blame] | 2164 | assert_cfg80211_lock(); |
| 2165 | |
Luis R. Rodriguez | abc7381 | 2009-07-30 17:38:08 -0700 | [diff] [blame] | 2166 | mutex_lock(®_mutex); |
| 2167 | |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 2168 | /* Note that this doesn't update the wiphys, this is done below */ |
| 2169 | r = __set_regdom(rd); |
Johannes Berg | d2372b3 | 2008-10-24 20:32:20 +0200 | [diff] [blame] | 2170 | if (r) { |
| 2171 | kfree(rd); |
Luis R. Rodriguez | abc7381 | 2009-07-30 17:38:08 -0700 | [diff] [blame] | 2172 | mutex_unlock(®_mutex); |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 2173 | return r; |
Johannes Berg | d2372b3 | 2008-10-24 20:32:20 +0200 | [diff] [blame] | 2174 | } |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 2175 | |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 2176 | /* This would make this whole thing pointless */ |
Luis R. Rodriguez | a01ddaf | 2008-11-12 14:21:59 -0800 | [diff] [blame] | 2177 | if (!last_request->intersect) |
| 2178 | BUG_ON(rd != cfg80211_regdomain); |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 2179 | |
| 2180 | /* update all wiphys now with the new established regulatory domain */ |
Johannes Berg | f6037d0 | 2008-10-21 11:01:33 +0200 | [diff] [blame] | 2181 | update_all_wiphy_regulatory(last_request->initiator); |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 2182 | |
Luis R. Rodriguez | a01ddaf | 2008-11-12 14:21:59 -0800 | [diff] [blame] | 2183 | print_regdomain(cfg80211_regdomain); |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 2184 | |
Luis R. Rodriguez | 73d54c9 | 2009-03-09 22:07:42 -0400 | [diff] [blame] | 2185 | nl80211_send_reg_change_event(last_request); |
| 2186 | |
Luis R. Rodriguez | b2e253c | 2010-11-17 21:46:09 -0800 | [diff] [blame] | 2187 | reg_set_request_processed(); |
| 2188 | |
Luis R. Rodriguez | abc7381 | 2009-07-30 17:38:08 -0700 | [diff] [blame] | 2189 | mutex_unlock(®_mutex); |
| 2190 | |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 2191 | return r; |
| 2192 | } |
| 2193 | |
Scott James Remnant | 4d9d88d | 2011-03-08 10:45:30 -0800 | [diff] [blame] | 2194 | #ifdef CONFIG_HOTPLUG |
| 2195 | int reg_device_uevent(struct device *dev, struct kobj_uevent_env *env) |
| 2196 | { |
| 2197 | if (last_request && !last_request->processed) { |
| 2198 | if (add_uevent_var(env, "COUNTRY=%c%c", |
| 2199 | last_request->alpha2[0], |
| 2200 | last_request->alpha2[1])) |
| 2201 | return -ENOMEM; |
| 2202 | } |
| 2203 | |
| 2204 | return 0; |
| 2205 | } |
| 2206 | #else |
| 2207 | int reg_device_uevent(struct device *dev, struct kobj_uevent_env *env) |
| 2208 | { |
| 2209 | return -ENODEV; |
| 2210 | } |
| 2211 | #endif /* CONFIG_HOTPLUG */ |
| 2212 | |
Luis R. Rodriguez | a179439 | 2009-02-21 00:04:21 -0500 | [diff] [blame] | 2213 | /* Caller must hold cfg80211_mutex */ |
Luis R. Rodriguez | 3f2355c | 2008-11-12 14:22:02 -0800 | [diff] [blame] | 2214 | void reg_device_remove(struct wiphy *wiphy) |
| 2215 | { |
Luis R. Rodriguez | 0ad8aca | 2009-03-24 21:21:08 -0400 | [diff] [blame] | 2216 | struct wiphy *request_wiphy = NULL; |
Luis R. Rodriguez | 806a9e3 | 2009-02-21 00:04:26 -0500 | [diff] [blame] | 2217 | |
Luis R. Rodriguez | 761cf7e | 2009-02-21 00:04:25 -0500 | [diff] [blame] | 2218 | assert_cfg80211_lock(); |
| 2219 | |
Luis R. Rodriguez | abc7381 | 2009-07-30 17:38:08 -0700 | [diff] [blame] | 2220 | mutex_lock(®_mutex); |
| 2221 | |
Chris Wright | 0ef9ccd | 2009-04-24 14:09:31 -0700 | [diff] [blame] | 2222 | kfree(wiphy->regd); |
| 2223 | |
Luis R. Rodriguez | 0ad8aca | 2009-03-24 21:21:08 -0400 | [diff] [blame] | 2224 | if (last_request) |
| 2225 | request_wiphy = wiphy_idx_to_wiphy(last_request->wiphy_idx); |
Luis R. Rodriguez | 806a9e3 | 2009-02-21 00:04:26 -0500 | [diff] [blame] | 2226 | |
Chris Wright | 0ef9ccd | 2009-04-24 14:09:31 -0700 | [diff] [blame] | 2227 | if (!request_wiphy || request_wiphy != wiphy) |
Luis R. Rodriguez | abc7381 | 2009-07-30 17:38:08 -0700 | [diff] [blame] | 2228 | goto out; |
Chris Wright | 0ef9ccd | 2009-04-24 14:09:31 -0700 | [diff] [blame] | 2229 | |
Luis R. Rodriguez | 806a9e3 | 2009-02-21 00:04:26 -0500 | [diff] [blame] | 2230 | last_request->wiphy_idx = WIPHY_IDX_STALE; |
Luis R. Rodriguez | 3f2355c | 2008-11-12 14:22:02 -0800 | [diff] [blame] | 2231 | last_request->country_ie_env = ENVIRON_ANY; |
Luis R. Rodriguez | abc7381 | 2009-07-30 17:38:08 -0700 | [diff] [blame] | 2232 | out: |
| 2233 | mutex_unlock(®_mutex); |
Luis R. Rodriguez | 3f2355c | 2008-11-12 14:22:02 -0800 | [diff] [blame] | 2234 | } |
| 2235 | |
Luis R. Rodriguez | a90c7a3 | 2011-04-05 10:49:04 -0700 | [diff] [blame] | 2236 | static void reg_timeout_work(struct work_struct *work) |
| 2237 | { |
| 2238 | REG_DBG_PRINT("Timeout while waiting for CRDA to reply, " |
Joe Perches | 12c5ffb | 2011-07-29 14:51:25 -0700 | [diff] [blame] | 2239 | "restoring regulatory settings\n"); |
Luis R. Rodriguez | a90c7a3 | 2011-04-05 10:49:04 -0700 | [diff] [blame] | 2240 | restore_regulatory_settings(true); |
| 2241 | } |
| 2242 | |
Uwe Kleine-König | 2fcc9f7 | 2010-06-18 09:38:55 +0200 | [diff] [blame] | 2243 | int __init regulatory_init(void) |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 2244 | { |
Luis R. Rodriguez | bcf4f99 | 2009-02-21 00:04:24 -0500 | [diff] [blame] | 2245 | int err = 0; |
Johannes Berg | 734366d | 2008-09-15 10:56:48 +0200 | [diff] [blame] | 2246 | |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 2247 | reg_pdev = platform_device_register_simple("regulatory", 0, NULL, 0); |
| 2248 | if (IS_ERR(reg_pdev)) |
| 2249 | return PTR_ERR(reg_pdev); |
Johannes Berg | 734366d | 2008-09-15 10:56:48 +0200 | [diff] [blame] | 2250 | |
Scott James Remnant | 4d9d88d | 2011-03-08 10:45:30 -0800 | [diff] [blame] | 2251 | reg_pdev->dev.type = ®_device_type; |
| 2252 | |
Luis R. Rodriguez | fe33eb3 | 2009-02-21 00:04:30 -0500 | [diff] [blame] | 2253 | spin_lock_init(®_requests_lock); |
Luis R. Rodriguez | e38f8a7 | 2009-02-21 00:20:39 -0500 | [diff] [blame] | 2254 | spin_lock_init(®_pending_beacons_lock); |
Luis R. Rodriguez | fe33eb3 | 2009-02-21 00:04:30 -0500 | [diff] [blame] | 2255 | |
Johannes Berg | a3d2eaf | 2008-09-15 11:10:52 +0200 | [diff] [blame] | 2256 | cfg80211_regdomain = cfg80211_world_regdom; |
Johannes Berg | 734366d | 2008-09-15 10:56:48 +0200 | [diff] [blame] | 2257 | |
Luis R. Rodriguez | 09d989d | 2010-01-29 19:58:57 -0500 | [diff] [blame] | 2258 | user_alpha2[0] = '9'; |
| 2259 | user_alpha2[1] = '7'; |
| 2260 | |
Luis R. Rodriguez | ae9e4b0 | 2009-07-14 20:23:15 -0400 | [diff] [blame] | 2261 | /* We always try to get an update for the static regdomain */ |
| 2262 | err = regulatory_hint_core(cfg80211_regdomain->alpha2); |
Luis R. Rodriguez | bcf4f99 | 2009-02-21 00:04:24 -0500 | [diff] [blame] | 2263 | if (err) { |
| 2264 | if (err == -ENOMEM) |
| 2265 | return err; |
| 2266 | /* |
| 2267 | * N.B. kobject_uevent_env() can fail mainly for when we're out |
| 2268 | * memory which is handled and propagated appropriately above |
| 2269 | * but it can also fail during a netlink_broadcast() or during |
| 2270 | * early boot for call_usermodehelper(). For now treat these |
| 2271 | * errors as non-fatal. |
| 2272 | */ |
Joe Perches | e9c0268 | 2010-11-16 19:56:49 -0800 | [diff] [blame] | 2273 | pr_err("kobject_uevent_env() was unable to call CRDA during init\n"); |
Luis R. Rodriguez | bcf4f99 | 2009-02-21 00:04:24 -0500 | [diff] [blame] | 2274 | #ifdef CONFIG_CFG80211_REG_DEBUG |
| 2275 | /* We want to find out exactly why when debugging */ |
| 2276 | WARN_ON(err); |
| 2277 | #endif |
| 2278 | } |
Johannes Berg | 734366d | 2008-09-15 10:56:48 +0200 | [diff] [blame] | 2279 | |
Luis R. Rodriguez | ae9e4b0 | 2009-07-14 20:23:15 -0400 | [diff] [blame] | 2280 | /* |
| 2281 | * Finally, if the user set the module parameter treat it |
| 2282 | * as a user hint. |
| 2283 | */ |
| 2284 | if (!is_world_regdom(ieee80211_regdom)) |
| 2285 | regulatory_hint_user(ieee80211_regdom); |
| 2286 | |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 2287 | return 0; |
| 2288 | } |
| 2289 | |
Uwe Kleine-König | 2fcc9f7 | 2010-06-18 09:38:55 +0200 | [diff] [blame] | 2290 | void /* __init_or_exit */ regulatory_exit(void) |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 2291 | { |
Luis R. Rodriguez | fe33eb3 | 2009-02-21 00:04:30 -0500 | [diff] [blame] | 2292 | struct regulatory_request *reg_request, *tmp; |
Luis R. Rodriguez | e38f8a7 | 2009-02-21 00:20:39 -0500 | [diff] [blame] | 2293 | struct reg_beacon *reg_beacon, *btmp; |
Luis R. Rodriguez | fe33eb3 | 2009-02-21 00:04:30 -0500 | [diff] [blame] | 2294 | |
| 2295 | cancel_work_sync(®_work); |
Luis R. Rodriguez | a90c7a3 | 2011-04-05 10:49:04 -0700 | [diff] [blame] | 2296 | cancel_delayed_work_sync(®_timeout); |
Luis R. Rodriguez | fe33eb3 | 2009-02-21 00:04:30 -0500 | [diff] [blame] | 2297 | |
Luis R. Rodriguez | a179439 | 2009-02-21 00:04:21 -0500 | [diff] [blame] | 2298 | mutex_lock(&cfg80211_mutex); |
Luis R. Rodriguez | abc7381 | 2009-07-30 17:38:08 -0700 | [diff] [blame] | 2299 | mutex_lock(®_mutex); |
Johannes Berg | 734366d | 2008-09-15 10:56:48 +0200 | [diff] [blame] | 2300 | |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 2301 | reset_regdomains(); |
Johannes Berg | 734366d | 2008-09-15 10:56:48 +0200 | [diff] [blame] | 2302 | |
Johannes Berg | f6037d0 | 2008-10-21 11:01:33 +0200 | [diff] [blame] | 2303 | kfree(last_request); |
| 2304 | |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 2305 | platform_device_unregister(reg_pdev); |
Johannes Berg | 734366d | 2008-09-15 10:56:48 +0200 | [diff] [blame] | 2306 | |
Luis R. Rodriguez | e38f8a7 | 2009-02-21 00:20:39 -0500 | [diff] [blame] | 2307 | spin_lock_bh(®_pending_beacons_lock); |
| 2308 | if (!list_empty(®_pending_beacons)) { |
| 2309 | list_for_each_entry_safe(reg_beacon, btmp, |
| 2310 | ®_pending_beacons, list) { |
| 2311 | list_del(®_beacon->list); |
| 2312 | kfree(reg_beacon); |
| 2313 | } |
| 2314 | } |
| 2315 | spin_unlock_bh(®_pending_beacons_lock); |
| 2316 | |
| 2317 | if (!list_empty(®_beacon_list)) { |
| 2318 | list_for_each_entry_safe(reg_beacon, btmp, |
| 2319 | ®_beacon_list, list) { |
| 2320 | list_del(®_beacon->list); |
| 2321 | kfree(reg_beacon); |
| 2322 | } |
| 2323 | } |
| 2324 | |
Luis R. Rodriguez | fe33eb3 | 2009-02-21 00:04:30 -0500 | [diff] [blame] | 2325 | spin_lock(®_requests_lock); |
| 2326 | if (!list_empty(®_requests_list)) { |
| 2327 | list_for_each_entry_safe(reg_request, tmp, |
| 2328 | ®_requests_list, list) { |
| 2329 | list_del(®_request->list); |
| 2330 | kfree(reg_request); |
| 2331 | } |
| 2332 | } |
| 2333 | spin_unlock(®_requests_lock); |
| 2334 | |
Luis R. Rodriguez | abc7381 | 2009-07-30 17:38:08 -0700 | [diff] [blame] | 2335 | mutex_unlock(®_mutex); |
Luis R. Rodriguez | a179439 | 2009-02-21 00:04:21 -0500 | [diff] [blame] | 2336 | mutex_unlock(&cfg80211_mutex); |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 2337 | } |