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