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 | 3b77d5e | 2011-12-20 12:23:38 -0800 | [diff] [blame] | 5 | * Copyright 2008-2011 Luis R. Rodriguez <mcgrof@qca.qualcomm.com> |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 6 | * |
Luis R. Rodriguez | 3b77d5e | 2011-12-20 12:23:38 -0800 | [diff] [blame] | 7 | * Permission to use, copy, modify, and/or distribute this software for any |
| 8 | * purpose with or without fee is hereby granted, provided that the above |
| 9 | * copyright notice and this permission notice appear in all copies. |
| 10 | * |
| 11 | * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES |
| 12 | * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF |
| 13 | * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR |
| 14 | * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
| 15 | * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN |
| 16 | * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF |
| 17 | * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 18 | */ |
| 19 | |
Luis R. Rodriguez | 3b77d5e | 2011-12-20 12:23:38 -0800 | [diff] [blame] | 20 | |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 21 | /** |
| 22 | * DOC: Wireless regulatory infrastructure |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 23 | * |
| 24 | * The usual implementation is for a driver to read a device EEPROM to |
| 25 | * determine which regulatory domain it should be operating under, then |
| 26 | * looking up the allowable channels in a driver-local table and finally |
| 27 | * registering those channels in the wiphy structure. |
| 28 | * |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 29 | * Another set of compliance enforcement is for drivers to use their |
| 30 | * own compliance limits which can be stored on the EEPROM. The host |
| 31 | * driver or firmware may ensure these are used. |
| 32 | * |
| 33 | * In addition to all this we provide an extra layer of regulatory |
| 34 | * conformance. For drivers which do not have any regulatory |
| 35 | * information CRDA provides the complete regulatory solution. |
| 36 | * For others it provides a community effort on further restrictions |
| 37 | * to enhance compliance. |
| 38 | * |
| 39 | * Note: When number of rules --> infinity we will not be able to |
| 40 | * index on alpha2 any more, instead we'll probably have to |
| 41 | * rely on some SHA1 checksum of the regdomain for example. |
| 42 | * |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 43 | */ |
Joe Perches | e9c0268 | 2010-11-16 19:56:49 -0800 | [diff] [blame] | 44 | |
| 45 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
| 46 | |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 47 | #include <linux/kernel.h> |
Paul Gortmaker | bc3b2d7 | 2011-07-15 11:47:34 -0400 | [diff] [blame] | 48 | #include <linux/export.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 49 | #include <linux/slab.h> |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 50 | #include <linux/list.h> |
| 51 | #include <linux/random.h> |
John W. Linville | c61029c | 2010-08-05 14:26:24 -0400 | [diff] [blame] | 52 | #include <linux/ctype.h> |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 53 | #include <linux/nl80211.h> |
| 54 | #include <linux/platform_device.h> |
Paul Gortmaker | d9b9384 | 2011-09-18 13:21:27 -0400 | [diff] [blame] | 55 | #include <linux/moduleparam.h> |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 56 | #include <net/cfg80211.h> |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 57 | #include "core.h" |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 58 | #include "reg.h" |
John W. Linville | 3b377ea | 2009-12-18 17:59:01 -0500 | [diff] [blame] | 59 | #include "regdb.h" |
Luis R. Rodriguez | 73d54c9 | 2009-03-09 22:07:42 -0400 | [diff] [blame] | 60 | #include "nl80211.h" |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 61 | |
Luis R. Rodriguez | 4113f75 | 2010-01-04 11:50:11 -0500 | [diff] [blame] | 62 | #ifdef CONFIG_CFG80211_REG_DEBUG |
Joe Perches | 12c5ffb | 2011-07-29 14:51:25 -0700 | [diff] [blame] | 63 | #define REG_DBG_PRINT(format, args...) \ |
| 64 | printk(KERN_DEBUG pr_fmt(format), ##args) |
Luis R. Rodriguez | 4113f75 | 2010-01-04 11:50:11 -0500 | [diff] [blame] | 65 | #else |
John W. Linville | 8271195 | 2010-01-05 17:57:20 -0500 | [diff] [blame] | 66 | #define REG_DBG_PRINT(args...) |
Luis R. Rodriguez | 4113f75 | 2010-01-04 11:50:11 -0500 | [diff] [blame] | 67 | #endif |
| 68 | |
Luis R. Rodriguez | a042994 | 2011-11-28 16:47:15 -0500 | [diff] [blame] | 69 | static struct regulatory_request core_request_world = { |
| 70 | .initiator = NL80211_REGDOM_SET_BY_CORE, |
| 71 | .alpha2[0] = '0', |
| 72 | .alpha2[1] = '0', |
| 73 | .intersect = false, |
| 74 | .processed = true, |
| 75 | .country_ie_env = ENVIRON_ANY, |
| 76 | }; |
| 77 | |
Luis R. Rodriguez | 5166ccd | 2008-10-30 13:33:56 -0700 | [diff] [blame] | 78 | /* Receipt of information from last regulatory request */ |
Luis R. Rodriguez | a042994 | 2011-11-28 16:47:15 -0500 | [diff] [blame] | 79 | static struct regulatory_request *last_request = &core_request_world; |
Johannes Berg | 734366d | 2008-09-15 10:56:48 +0200 | [diff] [blame] | 80 | |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 81 | /* To trigger userspace events */ |
| 82 | static struct platform_device *reg_pdev; |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 83 | |
Scott James Remnant | 4d9d88d | 2011-03-08 10:45:30 -0800 | [diff] [blame] | 84 | static struct device_type reg_device_type = { |
| 85 | .uevent = reg_device_uevent, |
| 86 | }; |
| 87 | |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 88 | /* |
| 89 | * Central wireless core regulatory domains, we only need two, |
Johannes Berg | 734366d | 2008-09-15 10:56:48 +0200 | [diff] [blame] | 90 | * 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] | 91 | * information to give us an alpha2 |
| 92 | */ |
Luis R. Rodriguez | f130347 | 2009-01-30 09:26:42 -0800 | [diff] [blame] | 93 | const struct ieee80211_regdomain *cfg80211_regdomain; |
Johannes Berg | 734366d | 2008-09-15 10:56:48 +0200 | [diff] [blame] | 94 | |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 95 | /* |
Luis R. Rodriguez | abc7381 | 2009-07-30 17:38:08 -0700 | [diff] [blame] | 96 | * Protects static reg.c components: |
| 97 | * - cfg80211_world_regdom |
| 98 | * - cfg80211_regdom |
Luis R. Rodriguez | abc7381 | 2009-07-30 17:38:08 -0700 | [diff] [blame] | 99 | * - last_request |
| 100 | */ |
John W. Linville | 670b7f1 | 2010-06-24 11:26:31 -0400 | [diff] [blame] | 101 | static DEFINE_MUTEX(reg_mutex); |
Johannes Berg | 46a5eba | 2010-09-15 13:28:15 +0200 | [diff] [blame] | 102 | |
| 103 | static inline void assert_reg_lock(void) |
| 104 | { |
| 105 | lockdep_assert_held(®_mutex); |
| 106 | } |
Luis R. Rodriguez | abc7381 | 2009-07-30 17:38:08 -0700 | [diff] [blame] | 107 | |
Luis R. Rodriguez | e38f8a7 | 2009-02-21 00:20:39 -0500 | [diff] [blame] | 108 | /* Used to queue up regulatory hints */ |
Luis R. Rodriguez | fe33eb3 | 2009-02-21 00:04:30 -0500 | [diff] [blame] | 109 | static LIST_HEAD(reg_requests_list); |
| 110 | static spinlock_t reg_requests_lock; |
| 111 | |
Luis R. Rodriguez | e38f8a7 | 2009-02-21 00:20:39 -0500 | [diff] [blame] | 112 | /* Used to queue up beacon hints for review */ |
| 113 | static LIST_HEAD(reg_pending_beacons); |
| 114 | static spinlock_t reg_pending_beacons_lock; |
| 115 | |
| 116 | /* Used to keep track of processed beacon hints */ |
| 117 | static LIST_HEAD(reg_beacon_list); |
| 118 | |
| 119 | struct reg_beacon { |
| 120 | struct list_head list; |
| 121 | struct ieee80211_channel chan; |
| 122 | }; |
| 123 | |
Luis R. Rodriguez | f333a7a | 2010-11-17 21:46:07 -0800 | [diff] [blame] | 124 | static void reg_todo(struct work_struct *work); |
| 125 | static DECLARE_WORK(reg_work, reg_todo); |
| 126 | |
Luis R. Rodriguez | a90c7a3 | 2011-04-05 10:49:04 -0700 | [diff] [blame] | 127 | static void reg_timeout_work(struct work_struct *work); |
| 128 | static DECLARE_DELAYED_WORK(reg_timeout, reg_timeout_work); |
| 129 | |
Johannes Berg | 734366d | 2008-09-15 10:56:48 +0200 | [diff] [blame] | 130 | /* We keep a static world regulatory domain in case of the absence of CRDA */ |
| 131 | static const struct ieee80211_regdomain world_regdom = { |
Luis R. Rodriguez | 611b6a8 | 2009-03-05 21:19:21 -0800 | [diff] [blame] | 132 | .n_reg_rules = 5, |
Johannes Berg | 734366d | 2008-09-15 10:56:48 +0200 | [diff] [blame] | 133 | .alpha2 = "00", |
| 134 | .reg_rules = { |
Luis R. Rodriguez | 68798a6 | 2009-02-21 00:20:37 -0500 | [diff] [blame] | 135 | /* IEEE 802.11b/g, channels 1..11 */ |
| 136 | REG_RULE(2412-10, 2462+10, 40, 6, 20, 0), |
Luis R. Rodriguez | 611b6a8 | 2009-03-05 21:19:21 -0800 | [diff] [blame] | 137 | /* IEEE 802.11b/g, channels 12..13. No HT40 |
| 138 | * channel fits here. */ |
| 139 | REG_RULE(2467-10, 2472+10, 20, 6, 20, |
Luis R. Rodriguez | 3fc71f7 | 2009-02-21 00:20:38 -0500 | [diff] [blame] | 140 | NL80211_RRF_PASSIVE_SCAN | |
| 141 | NL80211_RRF_NO_IBSS), |
Luis R. Rodriguez | 611b6a8 | 2009-03-05 21:19:21 -0800 | [diff] [blame] | 142 | /* IEEE 802.11 channel 14 - Only JP enables |
| 143 | * this and for 802.11b only */ |
| 144 | REG_RULE(2484-10, 2484+10, 20, 6, 20, |
| 145 | NL80211_RRF_PASSIVE_SCAN | |
| 146 | NL80211_RRF_NO_IBSS | |
| 147 | NL80211_RRF_NO_OFDM), |
| 148 | /* IEEE 802.11a, channel 36..48 */ |
Luis R. Rodriguez | ec329ac | 2009-03-05 21:19:22 -0800 | [diff] [blame] | 149 | REG_RULE(5180-10, 5240+10, 40, 6, 20, |
Luis R. Rodriguez | 611b6a8 | 2009-03-05 21:19:21 -0800 | [diff] [blame] | 150 | NL80211_RRF_PASSIVE_SCAN | |
| 151 | NL80211_RRF_NO_IBSS), |
Luis R. Rodriguez | 3fc71f7 | 2009-02-21 00:20:38 -0500 | [diff] [blame] | 152 | |
| 153 | /* NB: 5260 MHz - 5700 MHz requies DFS */ |
| 154 | |
| 155 | /* IEEE 802.11a, channel 149..165 */ |
Luis R. Rodriguez | ec329ac | 2009-03-05 21:19:22 -0800 | [diff] [blame] | 156 | REG_RULE(5745-10, 5825+10, 40, 6, 20, |
Luis R. Rodriguez | 3fc71f7 | 2009-02-21 00:20:38 -0500 | [diff] [blame] | 157 | NL80211_RRF_PASSIVE_SCAN | |
| 158 | NL80211_RRF_NO_IBSS), |
Johannes Berg | 734366d | 2008-09-15 10:56:48 +0200 | [diff] [blame] | 159 | } |
| 160 | }; |
| 161 | |
Johannes Berg | a3d2eaf | 2008-09-15 11:10:52 +0200 | [diff] [blame] | 162 | static const struct ieee80211_regdomain *cfg80211_world_regdom = |
| 163 | &world_regdom; |
Johannes Berg | 734366d | 2008-09-15 10:56:48 +0200 | [diff] [blame] | 164 | |
Luis R. Rodriguez | 6ee7d33 | 2009-03-20 23:53:06 -0400 | [diff] [blame] | 165 | static char *ieee80211_regdom = "00"; |
Luis R. Rodriguez | 09d989d | 2010-01-29 19:58:57 -0500 | [diff] [blame] | 166 | static char user_alpha2[2]; |
Luis R. Rodriguez | 6ee7d33 | 2009-03-20 23:53:06 -0400 | [diff] [blame] | 167 | |
Johannes Berg | 734366d | 2008-09-15 10:56:48 +0200 | [diff] [blame] | 168 | module_param(ieee80211_regdom, charp, 0444); |
| 169 | MODULE_PARM_DESC(ieee80211_regdom, "IEEE 802.11 regulatory domain code"); |
| 170 | |
Luis R. Rodriguez | a042994 | 2011-11-28 16:47:15 -0500 | [diff] [blame] | 171 | static void reset_regdomains(bool full_reset) |
Johannes Berg | 734366d | 2008-09-15 10:56:48 +0200 | [diff] [blame] | 172 | { |
Johannes Berg | 942b25c | 2008-09-15 11:26:47 +0200 | [diff] [blame] | 173 | /* avoid freeing static information or freeing something twice */ |
| 174 | if (cfg80211_regdomain == cfg80211_world_regdom) |
| 175 | cfg80211_regdomain = NULL; |
| 176 | if (cfg80211_world_regdom == &world_regdom) |
| 177 | cfg80211_world_regdom = NULL; |
| 178 | if (cfg80211_regdomain == &world_regdom) |
| 179 | cfg80211_regdomain = NULL; |
Johannes Berg | 942b25c | 2008-09-15 11:26:47 +0200 | [diff] [blame] | 180 | |
| 181 | kfree(cfg80211_regdomain); |
| 182 | kfree(cfg80211_world_regdom); |
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 | cfg80211_world_regdom = &world_regdom; |
Johannes Berg | 734366d | 2008-09-15 10:56:48 +0200 | [diff] [blame] | 185 | cfg80211_regdomain = NULL; |
Luis R. Rodriguez | a042994 | 2011-11-28 16:47:15 -0500 | [diff] [blame] | 186 | |
| 187 | if (!full_reset) |
| 188 | return; |
| 189 | |
| 190 | if (last_request != &core_request_world) |
| 191 | kfree(last_request); |
| 192 | last_request = &core_request_world; |
Johannes Berg | 734366d | 2008-09-15 10:56:48 +0200 | [diff] [blame] | 193 | } |
| 194 | |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 195 | /* |
| 196 | * Dynamic world regulatory domain requested by the wireless |
| 197 | * core upon initialization |
| 198 | */ |
Johannes Berg | a3d2eaf | 2008-09-15 11:10:52 +0200 | [diff] [blame] | 199 | static void update_world_regdomain(const struct ieee80211_regdomain *rd) |
Johannes Berg | 734366d | 2008-09-15 10:56:48 +0200 | [diff] [blame] | 200 | { |
Johannes Berg | f6037d0 | 2008-10-21 11:01:33 +0200 | [diff] [blame] | 201 | BUG_ON(!last_request); |
Johannes Berg | 734366d | 2008-09-15 10:56:48 +0200 | [diff] [blame] | 202 | |
Luis R. Rodriguez | a042994 | 2011-11-28 16:47:15 -0500 | [diff] [blame] | 203 | reset_regdomains(false); |
Johannes Berg | 734366d | 2008-09-15 10:56:48 +0200 | [diff] [blame] | 204 | |
| 205 | cfg80211_world_regdom = rd; |
| 206 | cfg80211_regdomain = rd; |
| 207 | } |
Johannes Berg | 734366d | 2008-09-15 10:56:48 +0200 | [diff] [blame] | 208 | |
Johannes Berg | a3d2eaf | 2008-09-15 11:10:52 +0200 | [diff] [blame] | 209 | bool is_world_regdom(const char *alpha2) |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 210 | { |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 211 | if (!alpha2) |
| 212 | return false; |
| 213 | if (alpha2[0] == '0' && alpha2[1] == '0') |
| 214 | return true; |
| 215 | return false; |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 216 | } |
| 217 | |
Johannes Berg | a3d2eaf | 2008-09-15 11:10:52 +0200 | [diff] [blame] | 218 | static bool is_alpha2_set(const char *alpha2) |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 219 | { |
| 220 | if (!alpha2) |
| 221 | return false; |
| 222 | if (alpha2[0] != 0 && alpha2[1] != 0) |
| 223 | return true; |
| 224 | return false; |
| 225 | } |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 226 | |
Johannes Berg | a3d2eaf | 2008-09-15 11:10:52 +0200 | [diff] [blame] | 227 | static bool is_unknown_alpha2(const char *alpha2) |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 228 | { |
| 229 | if (!alpha2) |
| 230 | return false; |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 231 | /* |
| 232 | * Special case where regulatory domain was built by driver |
| 233 | * but a specific alpha2 cannot be determined |
| 234 | */ |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 235 | if (alpha2[0] == '9' && alpha2[1] == '9') |
| 236 | return true; |
| 237 | return false; |
| 238 | } |
| 239 | |
Luis R. Rodriguez | 3f2355c | 2008-11-12 14:22:02 -0800 | [diff] [blame] | 240 | static bool is_intersected_alpha2(const char *alpha2) |
| 241 | { |
| 242 | if (!alpha2) |
| 243 | return false; |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 244 | /* |
| 245 | * Special case where regulatory domain is the |
Luis R. Rodriguez | 3f2355c | 2008-11-12 14:22:02 -0800 | [diff] [blame] | 246 | * result of an intersection between two regulatory domain |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 247 | * structures |
| 248 | */ |
Luis R. Rodriguez | 3f2355c | 2008-11-12 14:22:02 -0800 | [diff] [blame] | 249 | if (alpha2[0] == '9' && alpha2[1] == '8') |
| 250 | return true; |
| 251 | return false; |
| 252 | } |
| 253 | |
Johannes Berg | a3d2eaf | 2008-09-15 11:10:52 +0200 | [diff] [blame] | 254 | static bool is_an_alpha2(const char *alpha2) |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 255 | { |
| 256 | if (!alpha2) |
| 257 | return false; |
John W. Linville | c61029c | 2010-08-05 14:26:24 -0400 | [diff] [blame] | 258 | if (isalpha(alpha2[0]) && isalpha(alpha2[1])) |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 259 | return true; |
| 260 | return false; |
| 261 | } |
| 262 | |
Johannes Berg | a3d2eaf | 2008-09-15 11:10:52 +0200 | [diff] [blame] | 263 | 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] | 264 | { |
| 265 | if (!alpha2_x || !alpha2_y) |
| 266 | return false; |
| 267 | if (alpha2_x[0] == alpha2_y[0] && |
| 268 | alpha2_x[1] == alpha2_y[1]) |
| 269 | return true; |
| 270 | return false; |
| 271 | } |
| 272 | |
Luis R. Rodriguez | 69b1572 | 2009-02-21 00:04:33 -0500 | [diff] [blame] | 273 | static bool regdom_changes(const char *alpha2) |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 274 | { |
Luis R. Rodriguez | 761cf7e | 2009-02-21 00:04:25 -0500 | [diff] [blame] | 275 | assert_cfg80211_lock(); |
| 276 | |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 277 | if (!cfg80211_regdomain) |
| 278 | return true; |
| 279 | if (alpha2_equal(cfg80211_regdomain->alpha2, alpha2)) |
| 280 | return false; |
| 281 | return true; |
| 282 | } |
| 283 | |
Luis R. Rodriguez | 09d989d | 2010-01-29 19:58:57 -0500 | [diff] [blame] | 284 | /* |
| 285 | * The NL80211_REGDOM_SET_BY_USER regdom alpha2 is cached, this lets |
| 286 | * you know if a valid regulatory hint with NL80211_REGDOM_SET_BY_USER |
| 287 | * has ever been issued. |
| 288 | */ |
| 289 | static bool is_user_regdom_saved(void) |
| 290 | { |
| 291 | if (user_alpha2[0] == '9' && user_alpha2[1] == '7') |
| 292 | return false; |
| 293 | |
| 294 | /* This would indicate a mistake on the design */ |
| 295 | if (WARN((!is_world_regdom(user_alpha2) && |
| 296 | !is_an_alpha2(user_alpha2)), |
| 297 | "Unexpected user alpha2: %c%c\n", |
| 298 | user_alpha2[0], |
| 299 | user_alpha2[1])) |
| 300 | return false; |
| 301 | |
| 302 | return true; |
| 303 | } |
| 304 | |
John W. Linville | 3b377ea | 2009-12-18 17:59:01 -0500 | [diff] [blame] | 305 | static int reg_copy_regd(const struct ieee80211_regdomain **dst_regd, |
| 306 | const struct ieee80211_regdomain *src_regd) |
| 307 | { |
| 308 | struct ieee80211_regdomain *regd; |
| 309 | int size_of_regd = 0; |
| 310 | unsigned int i; |
| 311 | |
| 312 | size_of_regd = sizeof(struct ieee80211_regdomain) + |
| 313 | ((src_regd->n_reg_rules + 1) * sizeof(struct ieee80211_reg_rule)); |
| 314 | |
| 315 | regd = kzalloc(size_of_regd, GFP_KERNEL); |
| 316 | if (!regd) |
| 317 | return -ENOMEM; |
| 318 | |
| 319 | memcpy(regd, src_regd, sizeof(struct ieee80211_regdomain)); |
| 320 | |
| 321 | for (i = 0; i < src_regd->n_reg_rules; i++) |
| 322 | memcpy(®d->reg_rules[i], &src_regd->reg_rules[i], |
| 323 | sizeof(struct ieee80211_reg_rule)); |
| 324 | |
| 325 | *dst_regd = regd; |
| 326 | return 0; |
| 327 | } |
| 328 | |
| 329 | #ifdef CONFIG_CFG80211_INTERNAL_REGDB |
| 330 | struct reg_regdb_search_request { |
| 331 | char alpha2[2]; |
| 332 | struct list_head list; |
| 333 | }; |
| 334 | |
| 335 | static LIST_HEAD(reg_regdb_search_list); |
John W. Linville | 368d06f | 2010-03-16 15:40:59 -0400 | [diff] [blame] | 336 | static DEFINE_MUTEX(reg_regdb_search_mutex); |
John W. Linville | 3b377ea | 2009-12-18 17:59:01 -0500 | [diff] [blame] | 337 | |
| 338 | static void reg_regdb_search(struct work_struct *work) |
| 339 | { |
| 340 | struct reg_regdb_search_request *request; |
| 341 | const struct ieee80211_regdomain *curdom, *regdom; |
| 342 | int i, r; |
| 343 | |
John W. Linville | 368d06f | 2010-03-16 15:40:59 -0400 | [diff] [blame] | 344 | mutex_lock(®_regdb_search_mutex); |
John W. Linville | 3b377ea | 2009-12-18 17:59:01 -0500 | [diff] [blame] | 345 | while (!list_empty(®_regdb_search_list)) { |
| 346 | request = list_first_entry(®_regdb_search_list, |
| 347 | struct reg_regdb_search_request, |
| 348 | list); |
| 349 | list_del(&request->list); |
| 350 | |
| 351 | for (i=0; i<reg_regdb_size; i++) { |
| 352 | curdom = reg_regdb[i]; |
| 353 | |
| 354 | if (!memcmp(request->alpha2, curdom->alpha2, 2)) { |
| 355 | r = reg_copy_regd(®dom, curdom); |
| 356 | if (r) |
| 357 | break; |
John W. Linville | 3b377ea | 2009-12-18 17:59:01 -0500 | [diff] [blame] | 358 | mutex_lock(&cfg80211_mutex); |
| 359 | set_regdom(regdom); |
| 360 | mutex_unlock(&cfg80211_mutex); |
John W. Linville | 3b377ea | 2009-12-18 17:59:01 -0500 | [diff] [blame] | 361 | break; |
| 362 | } |
| 363 | } |
| 364 | |
| 365 | kfree(request); |
| 366 | } |
John W. Linville | 368d06f | 2010-03-16 15:40:59 -0400 | [diff] [blame] | 367 | mutex_unlock(®_regdb_search_mutex); |
John W. Linville | 3b377ea | 2009-12-18 17:59:01 -0500 | [diff] [blame] | 368 | } |
| 369 | |
| 370 | static DECLARE_WORK(reg_regdb_work, reg_regdb_search); |
| 371 | |
| 372 | static void reg_regdb_query(const char *alpha2) |
| 373 | { |
| 374 | struct reg_regdb_search_request *request; |
| 375 | |
| 376 | if (!alpha2) |
| 377 | return; |
| 378 | |
| 379 | request = kzalloc(sizeof(struct reg_regdb_search_request), GFP_KERNEL); |
| 380 | if (!request) |
| 381 | return; |
| 382 | |
| 383 | memcpy(request->alpha2, alpha2, 2); |
| 384 | |
John W. Linville | 368d06f | 2010-03-16 15:40:59 -0400 | [diff] [blame] | 385 | mutex_lock(®_regdb_search_mutex); |
John W. Linville | 3b377ea | 2009-12-18 17:59:01 -0500 | [diff] [blame] | 386 | list_add_tail(&request->list, ®_regdb_search_list); |
John W. Linville | 368d06f | 2010-03-16 15:40:59 -0400 | [diff] [blame] | 387 | mutex_unlock(®_regdb_search_mutex); |
John W. Linville | 3b377ea | 2009-12-18 17:59:01 -0500 | [diff] [blame] | 388 | |
| 389 | schedule_work(®_regdb_work); |
| 390 | } |
| 391 | #else |
| 392 | static inline void reg_regdb_query(const char *alpha2) {} |
| 393 | #endif /* CONFIG_CFG80211_INTERNAL_REGDB */ |
| 394 | |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 395 | /* |
| 396 | * 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] | 397 | * basis in userspace. Country information is filled in by |
| 398 | * reg_device_uevent |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 399 | */ |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 400 | static int call_crda(const char *alpha2) |
| 401 | { |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 402 | if (!is_world_regdom((char *) alpha2)) |
Joe Perches | e9c0268 | 2010-11-16 19:56:49 -0800 | [diff] [blame] | 403 | pr_info("Calling CRDA for country: %c%c\n", |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 404 | alpha2[0], alpha2[1]); |
| 405 | else |
Joe Perches | e9c0268 | 2010-11-16 19:56:49 -0800 | [diff] [blame] | 406 | pr_info("Calling CRDA to update world regulatory domain\n"); |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 407 | |
John W. Linville | 3b377ea | 2009-12-18 17:59:01 -0500 | [diff] [blame] | 408 | /* query internal regulatory database (if it exists) */ |
| 409 | reg_regdb_query(alpha2); |
| 410 | |
Scott James Remnant | 4d9d88d | 2011-03-08 10:45:30 -0800 | [diff] [blame] | 411 | return kobject_uevent(®_pdev->dev.kobj, KOBJ_CHANGE); |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 412 | } |
| 413 | |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 414 | /* Used by nl80211 before kmalloc'ing our regulatory domain */ |
Johannes Berg | a3d2eaf | 2008-09-15 11:10:52 +0200 | [diff] [blame] | 415 | bool reg_is_valid_request(const char *alpha2) |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 416 | { |
Luis R. Rodriguez | 61405e9 | 2009-05-13 17:04:41 -0400 | [diff] [blame] | 417 | assert_cfg80211_lock(); |
| 418 | |
Johannes Berg | f6037d0 | 2008-10-21 11:01:33 +0200 | [diff] [blame] | 419 | if (!last_request) |
| 420 | return false; |
| 421 | |
| 422 | return alpha2_equal(last_request->alpha2, alpha2); |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 423 | } |
| 424 | |
| 425 | /* Sanity check on a regulatory rule */ |
Johannes Berg | a3d2eaf | 2008-09-15 11:10:52 +0200 | [diff] [blame] | 426 | 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] | 427 | { |
Johannes Berg | a3d2eaf | 2008-09-15 11:10:52 +0200 | [diff] [blame] | 428 | const struct ieee80211_freq_range *freq_range = &rule->freq_range; |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 429 | u32 freq_diff; |
| 430 | |
Luis R. Rodriguez | 91e9900 | 2008-11-12 14:21:55 -0800 | [diff] [blame] | 431 | 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] | 432 | return false; |
| 433 | |
| 434 | if (freq_range->start_freq_khz > freq_range->end_freq_khz) |
| 435 | return false; |
| 436 | |
| 437 | freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz; |
| 438 | |
Roel Kluin | bd05f28 | 2009-03-03 22:55:21 +0100 | [diff] [blame] | 439 | if (freq_range->end_freq_khz <= freq_range->start_freq_khz || |
| 440 | freq_range->max_bandwidth_khz > freq_diff) |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 441 | return false; |
| 442 | |
| 443 | return true; |
| 444 | } |
| 445 | |
Johannes Berg | a3d2eaf | 2008-09-15 11:10:52 +0200 | [diff] [blame] | 446 | static bool is_valid_rd(const struct ieee80211_regdomain *rd) |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 447 | { |
Johannes Berg | a3d2eaf | 2008-09-15 11:10:52 +0200 | [diff] [blame] | 448 | const struct ieee80211_reg_rule *reg_rule = NULL; |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 449 | unsigned int i; |
| 450 | |
| 451 | if (!rd->n_reg_rules) |
| 452 | return false; |
| 453 | |
Luis R. Rodriguez | 88dc1c3 | 2008-11-12 14:22:01 -0800 | [diff] [blame] | 454 | if (WARN_ON(rd->n_reg_rules > NL80211_MAX_SUPP_REG_RULES)) |
| 455 | return false; |
| 456 | |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 457 | for (i = 0; i < rd->n_reg_rules; i++) { |
| 458 | reg_rule = &rd->reg_rules[i]; |
| 459 | if (!is_valid_reg_rule(reg_rule)) |
| 460 | return false; |
| 461 | } |
| 462 | |
| 463 | return true; |
| 464 | } |
| 465 | |
Luis R. Rodriguez | 038659e | 2009-05-02 00:37:17 -0400 | [diff] [blame] | 466 | static bool reg_does_bw_fit(const struct ieee80211_freq_range *freq_range, |
| 467 | u32 center_freq_khz, |
| 468 | u32 bw_khz) |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 469 | { |
Luis R. Rodriguez | 038659e | 2009-05-02 00:37:17 -0400 | [diff] [blame] | 470 | u32 start_freq_khz, end_freq_khz; |
| 471 | |
| 472 | start_freq_khz = center_freq_khz - (bw_khz/2); |
| 473 | end_freq_khz = center_freq_khz + (bw_khz/2); |
| 474 | |
| 475 | if (start_freq_khz >= freq_range->start_freq_khz && |
| 476 | end_freq_khz <= freq_range->end_freq_khz) |
| 477 | return true; |
| 478 | |
| 479 | return false; |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 480 | } |
| 481 | |
Luis R. Rodriguez | 0c7dc45 | 2009-01-07 17:43:36 -0800 | [diff] [blame] | 482 | /** |
| 483 | * freq_in_rule_band - tells us if a frequency is in a frequency band |
| 484 | * @freq_range: frequency rule we want to query |
| 485 | * @freq_khz: frequency we are inquiring about |
| 486 | * |
| 487 | * This lets us know if a specific frequency rule is or is not relevant to |
| 488 | * a specific frequency's band. Bands are device specific and artificial |
| 489 | * definitions (the "2.4 GHz band" and the "5 GHz band"), however it is |
| 490 | * safe for now to assume that a frequency rule should not be part of a |
| 491 | * frequency's band if the start freq or end freq are off by more than 2 GHz. |
| 492 | * This resolution can be lowered and should be considered as we add |
| 493 | * regulatory rule support for other "bands". |
| 494 | **/ |
| 495 | static bool freq_in_rule_band(const struct ieee80211_freq_range *freq_range, |
| 496 | u32 freq_khz) |
| 497 | { |
| 498 | #define ONE_GHZ_IN_KHZ 1000000 |
| 499 | if (abs(freq_khz - freq_range->start_freq_khz) <= (2 * ONE_GHZ_IN_KHZ)) |
| 500 | return true; |
| 501 | if (abs(freq_khz - freq_range->end_freq_khz) <= (2 * ONE_GHZ_IN_KHZ)) |
| 502 | return true; |
| 503 | return false; |
| 504 | #undef ONE_GHZ_IN_KHZ |
| 505 | } |
| 506 | |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 507 | /* |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 508 | * Helper for regdom_intersect(), this does the real |
| 509 | * mathematical intersection fun |
| 510 | */ |
Luis R. Rodriguez | 9c96477 | 2008-10-30 13:33:53 -0700 | [diff] [blame] | 511 | static int reg_rules_intersect( |
| 512 | const struct ieee80211_reg_rule *rule1, |
| 513 | const struct ieee80211_reg_rule *rule2, |
| 514 | struct ieee80211_reg_rule *intersected_rule) |
| 515 | { |
| 516 | const struct ieee80211_freq_range *freq_range1, *freq_range2; |
| 517 | struct ieee80211_freq_range *freq_range; |
| 518 | const struct ieee80211_power_rule *power_rule1, *power_rule2; |
| 519 | struct ieee80211_power_rule *power_rule; |
| 520 | u32 freq_diff; |
| 521 | |
| 522 | freq_range1 = &rule1->freq_range; |
| 523 | freq_range2 = &rule2->freq_range; |
| 524 | freq_range = &intersected_rule->freq_range; |
| 525 | |
| 526 | power_rule1 = &rule1->power_rule; |
| 527 | power_rule2 = &rule2->power_rule; |
| 528 | power_rule = &intersected_rule->power_rule; |
| 529 | |
| 530 | freq_range->start_freq_khz = max(freq_range1->start_freq_khz, |
| 531 | freq_range2->start_freq_khz); |
| 532 | freq_range->end_freq_khz = min(freq_range1->end_freq_khz, |
| 533 | freq_range2->end_freq_khz); |
| 534 | freq_range->max_bandwidth_khz = min(freq_range1->max_bandwidth_khz, |
| 535 | freq_range2->max_bandwidth_khz); |
| 536 | |
| 537 | freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz; |
| 538 | if (freq_range->max_bandwidth_khz > freq_diff) |
| 539 | freq_range->max_bandwidth_khz = freq_diff; |
| 540 | |
| 541 | power_rule->max_eirp = min(power_rule1->max_eirp, |
| 542 | power_rule2->max_eirp); |
| 543 | power_rule->max_antenna_gain = min(power_rule1->max_antenna_gain, |
| 544 | power_rule2->max_antenna_gain); |
| 545 | |
| 546 | intersected_rule->flags = (rule1->flags | rule2->flags); |
| 547 | |
| 548 | if (!is_valid_reg_rule(intersected_rule)) |
| 549 | return -EINVAL; |
| 550 | |
| 551 | return 0; |
| 552 | } |
| 553 | |
| 554 | /** |
| 555 | * regdom_intersect - do the intersection between two regulatory domains |
| 556 | * @rd1: first regulatory domain |
| 557 | * @rd2: second regulatory domain |
| 558 | * |
| 559 | * Use this function to get the intersection between two regulatory domains. |
| 560 | * Once completed we will mark the alpha2 for the rd as intersected, "98", |
| 561 | * as no one single alpha2 can represent this regulatory domain. |
| 562 | * |
| 563 | * Returns a pointer to the regulatory domain structure which will hold the |
| 564 | * resulting intersection of rules between rd1 and rd2. We will |
| 565 | * kzalloc() this structure for you. |
| 566 | */ |
| 567 | static struct ieee80211_regdomain *regdom_intersect( |
| 568 | const struct ieee80211_regdomain *rd1, |
| 569 | const struct ieee80211_regdomain *rd2) |
| 570 | { |
| 571 | int r, size_of_regd; |
| 572 | unsigned int x, y; |
| 573 | unsigned int num_rules = 0, rule_idx = 0; |
| 574 | const struct ieee80211_reg_rule *rule1, *rule2; |
| 575 | struct ieee80211_reg_rule *intersected_rule; |
| 576 | struct ieee80211_regdomain *rd; |
| 577 | /* This is just a dummy holder to help us count */ |
| 578 | struct ieee80211_reg_rule irule; |
| 579 | |
| 580 | /* Uses the stack temporarily for counter arithmetic */ |
| 581 | intersected_rule = &irule; |
| 582 | |
| 583 | memset(intersected_rule, 0, sizeof(struct ieee80211_reg_rule)); |
| 584 | |
| 585 | if (!rd1 || !rd2) |
| 586 | return NULL; |
| 587 | |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 588 | /* |
| 589 | * 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] | 590 | * build them. This is to so we can malloc() and free() a |
| 591 | * regdomain once. The reason we use reg_rules_intersect() here |
| 592 | * 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] | 593 | * All rules that do check out OK are valid. |
| 594 | */ |
Luis R. Rodriguez | 9c96477 | 2008-10-30 13:33:53 -0700 | [diff] [blame] | 595 | |
| 596 | for (x = 0; x < rd1->n_reg_rules; x++) { |
| 597 | rule1 = &rd1->reg_rules[x]; |
| 598 | for (y = 0; y < rd2->n_reg_rules; y++) { |
| 599 | rule2 = &rd2->reg_rules[y]; |
| 600 | if (!reg_rules_intersect(rule1, rule2, |
| 601 | intersected_rule)) |
| 602 | num_rules++; |
| 603 | memset(intersected_rule, 0, |
| 604 | sizeof(struct ieee80211_reg_rule)); |
| 605 | } |
| 606 | } |
| 607 | |
| 608 | if (!num_rules) |
| 609 | return NULL; |
| 610 | |
| 611 | size_of_regd = sizeof(struct ieee80211_regdomain) + |
| 612 | ((num_rules + 1) * sizeof(struct ieee80211_reg_rule)); |
| 613 | |
| 614 | rd = kzalloc(size_of_regd, GFP_KERNEL); |
| 615 | if (!rd) |
| 616 | return NULL; |
| 617 | |
| 618 | for (x = 0; x < rd1->n_reg_rules; x++) { |
| 619 | rule1 = &rd1->reg_rules[x]; |
| 620 | for (y = 0; y < rd2->n_reg_rules; y++) { |
| 621 | rule2 = &rd2->reg_rules[y]; |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 622 | /* |
| 623 | * This time around instead of using the stack lets |
Luis R. Rodriguez | 9c96477 | 2008-10-30 13:33:53 -0700 | [diff] [blame] | 624 | * write to the target rule directly saving ourselves |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 625 | * a memcpy() |
| 626 | */ |
Luis R. Rodriguez | 9c96477 | 2008-10-30 13:33:53 -0700 | [diff] [blame] | 627 | intersected_rule = &rd->reg_rules[rule_idx]; |
| 628 | r = reg_rules_intersect(rule1, rule2, |
| 629 | intersected_rule); |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 630 | /* |
| 631 | * No need to memset here the intersected rule here as |
| 632 | * we're not using the stack anymore |
| 633 | */ |
Luis R. Rodriguez | 9c96477 | 2008-10-30 13:33:53 -0700 | [diff] [blame] | 634 | if (r) |
| 635 | continue; |
| 636 | rule_idx++; |
| 637 | } |
| 638 | } |
| 639 | |
| 640 | if (rule_idx != num_rules) { |
| 641 | kfree(rd); |
| 642 | return NULL; |
| 643 | } |
| 644 | |
| 645 | rd->n_reg_rules = num_rules; |
| 646 | rd->alpha2[0] = '9'; |
| 647 | rd->alpha2[1] = '8'; |
| 648 | |
| 649 | return rd; |
| 650 | } |
| 651 | |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 652 | /* |
| 653 | * XXX: add support for the rest of enum nl80211_reg_rule_flags, we may |
| 654 | * want to just have the channel structure use these |
| 655 | */ |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 656 | static u32 map_regdom_flags(u32 rd_flags) |
| 657 | { |
| 658 | u32 channel_flags = 0; |
| 659 | if (rd_flags & NL80211_RRF_PASSIVE_SCAN) |
| 660 | channel_flags |= IEEE80211_CHAN_PASSIVE_SCAN; |
| 661 | if (rd_flags & NL80211_RRF_NO_IBSS) |
| 662 | channel_flags |= IEEE80211_CHAN_NO_IBSS; |
| 663 | if (rd_flags & NL80211_RRF_DFS) |
| 664 | channel_flags |= IEEE80211_CHAN_RADAR; |
| 665 | return channel_flags; |
| 666 | } |
| 667 | |
Luis R. Rodriguez | 1fa25e4 | 2009-01-22 15:05:44 -0800 | [diff] [blame] | 668 | static int freq_reg_info_regd(struct wiphy *wiphy, |
| 669 | u32 center_freq, |
Luis R. Rodriguez | 038659e | 2009-05-02 00:37:17 -0400 | [diff] [blame] | 670 | u32 desired_bw_khz, |
Luis R. Rodriguez | 1fa25e4 | 2009-01-22 15:05:44 -0800 | [diff] [blame] | 671 | const struct ieee80211_reg_rule **reg_rule, |
| 672 | const struct ieee80211_regdomain *custom_regd) |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 673 | { |
| 674 | int i; |
Luis R. Rodriguez | 0c7dc45 | 2009-01-07 17:43:36 -0800 | [diff] [blame] | 675 | bool band_rule_found = false; |
Luis R. Rodriguez | 3e0c3ff | 2009-01-07 17:43:34 -0800 | [diff] [blame] | 676 | const struct ieee80211_regdomain *regd; |
Luis R. Rodriguez | 038659e | 2009-05-02 00:37:17 -0400 | [diff] [blame] | 677 | bool bw_fits = false; |
| 678 | |
| 679 | if (!desired_bw_khz) |
| 680 | desired_bw_khz = MHZ_TO_KHZ(20); |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 681 | |
Luis R. Rodriguez | 1fa25e4 | 2009-01-22 15:05:44 -0800 | [diff] [blame] | 682 | regd = custom_regd ? custom_regd : cfg80211_regdomain; |
Luis R. Rodriguez | 3e0c3ff | 2009-01-07 17:43:34 -0800 | [diff] [blame] | 683 | |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 684 | /* |
| 685 | * Follow the driver's regulatory domain, if present, unless a country |
| 686 | * IE has been processed or a user wants to help complaince further |
| 687 | */ |
Luis R. Rodriguez | 2784fe9 | 2010-12-15 19:24:11 -0800 | [diff] [blame] | 688 | if (!custom_regd && |
| 689 | last_request->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && |
Luis R. Rodriguez | 7db90f4 | 2009-03-09 22:07:41 -0400 | [diff] [blame] | 690 | last_request->initiator != NL80211_REGDOM_SET_BY_USER && |
Luis R. Rodriguez | 3e0c3ff | 2009-01-07 17:43:34 -0800 | [diff] [blame] | 691 | wiphy->regd) |
| 692 | regd = wiphy->regd; |
| 693 | |
| 694 | if (!regd) |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 695 | return -EINVAL; |
| 696 | |
Luis R. Rodriguez | 3e0c3ff | 2009-01-07 17:43:34 -0800 | [diff] [blame] | 697 | for (i = 0; i < regd->n_reg_rules; i++) { |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 698 | const struct ieee80211_reg_rule *rr; |
| 699 | const struct ieee80211_freq_range *fr = NULL; |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 700 | |
Luis R. Rodriguez | 3e0c3ff | 2009-01-07 17:43:34 -0800 | [diff] [blame] | 701 | rr = ®d->reg_rules[i]; |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 702 | fr = &rr->freq_range; |
Luis R. Rodriguez | 0c7dc45 | 2009-01-07 17:43:36 -0800 | [diff] [blame] | 703 | |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 704 | /* |
| 705 | * We only need to know if one frequency rule was |
Luis R. Rodriguez | 0c7dc45 | 2009-01-07 17:43:36 -0800 | [diff] [blame] | 706 | * was in center_freq's band, that's enough, so lets |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 707 | * not overwrite it once found |
| 708 | */ |
Luis R. Rodriguez | 0c7dc45 | 2009-01-07 17:43:36 -0800 | [diff] [blame] | 709 | if (!band_rule_found) |
| 710 | band_rule_found = freq_in_rule_band(fr, center_freq); |
| 711 | |
Luis R. Rodriguez | 038659e | 2009-05-02 00:37:17 -0400 | [diff] [blame] | 712 | bw_fits = reg_does_bw_fit(fr, |
| 713 | center_freq, |
| 714 | desired_bw_khz); |
Luis R. Rodriguez | 0c7dc45 | 2009-01-07 17:43:36 -0800 | [diff] [blame] | 715 | |
Luis R. Rodriguez | 038659e | 2009-05-02 00:37:17 -0400 | [diff] [blame] | 716 | if (band_rule_found && bw_fits) { |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 717 | *reg_rule = rr; |
Luis R. Rodriguez | 038659e | 2009-05-02 00:37:17 -0400 | [diff] [blame] | 718 | return 0; |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 719 | } |
| 720 | } |
| 721 | |
Luis R. Rodriguez | 0c7dc45 | 2009-01-07 17:43:36 -0800 | [diff] [blame] | 722 | if (!band_rule_found) |
| 723 | return -ERANGE; |
| 724 | |
Luis R. Rodriguez | 038659e | 2009-05-02 00:37:17 -0400 | [diff] [blame] | 725 | return -EINVAL; |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 726 | } |
| 727 | |
Luis R. Rodriguez | 038659e | 2009-05-02 00:37:17 -0400 | [diff] [blame] | 728 | int freq_reg_info(struct wiphy *wiphy, |
| 729 | u32 center_freq, |
| 730 | u32 desired_bw_khz, |
| 731 | const struct ieee80211_reg_rule **reg_rule) |
Luis R. Rodriguez | 1fa25e4 | 2009-01-22 15:05:44 -0800 | [diff] [blame] | 732 | { |
Luis R. Rodriguez | ac46d48 | 2009-05-01 18:44:50 -0400 | [diff] [blame] | 733 | assert_cfg80211_lock(); |
Luis R. Rodriguez | 038659e | 2009-05-02 00:37:17 -0400 | [diff] [blame] | 734 | return freq_reg_info_regd(wiphy, |
| 735 | center_freq, |
| 736 | desired_bw_khz, |
| 737 | reg_rule, |
| 738 | NULL); |
Luis R. Rodriguez | 1fa25e4 | 2009-01-22 15:05:44 -0800 | [diff] [blame] | 739 | } |
John W. Linville | 4f366c5 | 2010-07-15 14:57:33 -0400 | [diff] [blame] | 740 | EXPORT_SYMBOL(freq_reg_info); |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 741 | |
Luis R. Rodriguez | 926a0a0 | 2010-10-21 19:17:03 +0530 | [diff] [blame] | 742 | #ifdef CONFIG_CFG80211_REG_DEBUG |
| 743 | static const char *reg_initiator_name(enum nl80211_reg_initiator initiator) |
| 744 | { |
| 745 | switch (initiator) { |
| 746 | case NL80211_REGDOM_SET_BY_CORE: |
| 747 | return "Set by core"; |
| 748 | case NL80211_REGDOM_SET_BY_USER: |
| 749 | return "Set by user"; |
| 750 | case NL80211_REGDOM_SET_BY_DRIVER: |
| 751 | return "Set by driver"; |
| 752 | case NL80211_REGDOM_SET_BY_COUNTRY_IE: |
| 753 | return "Set by country IE"; |
| 754 | default: |
| 755 | WARN_ON(1); |
| 756 | return "Set by bug"; |
| 757 | } |
| 758 | } |
Luis R. Rodriguez | e702d3c | 2010-10-21 19:17:04 +0530 | [diff] [blame] | 759 | |
| 760 | static void chan_reg_rule_print_dbg(struct ieee80211_channel *chan, |
| 761 | u32 desired_bw_khz, |
| 762 | const struct ieee80211_reg_rule *reg_rule) |
| 763 | { |
| 764 | const struct ieee80211_power_rule *power_rule; |
| 765 | const struct ieee80211_freq_range *freq_range; |
| 766 | char max_antenna_gain[32]; |
| 767 | |
| 768 | power_rule = ®_rule->power_rule; |
| 769 | freq_range = ®_rule->freq_range; |
| 770 | |
| 771 | if (!power_rule->max_antenna_gain) |
| 772 | snprintf(max_antenna_gain, 32, "N/A"); |
| 773 | else |
| 774 | snprintf(max_antenna_gain, 32, "%d", power_rule->max_antenna_gain); |
| 775 | |
Luis R. Rodriguez | d91e41b | 2010-10-20 10:18:59 -0700 | [diff] [blame] | 776 | REG_DBG_PRINT("Updating information on frequency %d MHz " |
Bob Copeland | ff039c6 | 2010-12-29 17:09:02 -0500 | [diff] [blame] | 777 | "for a %d MHz width channel with regulatory rule:\n", |
Luis R. Rodriguez | e702d3c | 2010-10-21 19:17:04 +0530 | [diff] [blame] | 778 | chan->center_freq, |
| 779 | KHZ_TO_MHZ(desired_bw_khz)); |
| 780 | |
Pavel Roskin | 56e6786 | 2011-09-01 11:54:12 -0400 | [diff] [blame] | 781 | REG_DBG_PRINT("%d KHz - %d KHz @ %d KHz), (%s mBi, %d mBm)\n", |
Luis R. Rodriguez | e702d3c | 2010-10-21 19:17:04 +0530 | [diff] [blame] | 782 | freq_range->start_freq_khz, |
| 783 | freq_range->end_freq_khz, |
Pavel Roskin | 56e6786 | 2011-09-01 11:54:12 -0400 | [diff] [blame] | 784 | freq_range->max_bandwidth_khz, |
Luis R. Rodriguez | e702d3c | 2010-10-21 19:17:04 +0530 | [diff] [blame] | 785 | max_antenna_gain, |
| 786 | power_rule->max_eirp); |
| 787 | } |
| 788 | #else |
| 789 | static void chan_reg_rule_print_dbg(struct ieee80211_channel *chan, |
| 790 | u32 desired_bw_khz, |
| 791 | const struct ieee80211_reg_rule *reg_rule) |
| 792 | { |
| 793 | return; |
| 794 | } |
Luis R. Rodriguez | 926a0a0 | 2010-10-21 19:17:03 +0530 | [diff] [blame] | 795 | #endif |
| 796 | |
Luis R. Rodriguez | 038659e | 2009-05-02 00:37:17 -0400 | [diff] [blame] | 797 | /* |
| 798 | * Note that right now we assume the desired channel bandwidth |
| 799 | * is always 20 MHz for each individual channel (HT40 uses 20 MHz |
| 800 | * per channel, the primary and the extension channel). To support |
| 801 | * smaller custom bandwidths such as 5 MHz or 10 MHz we'll need a |
| 802 | * new ieee80211_channel.target_bw and re run the regulatory check |
| 803 | * on the wiphy with the target_bw specified. Then we can simply use |
| 804 | * that below for the desired_bw_khz below. |
| 805 | */ |
Luis R. Rodriguez | 7ca43d0 | 2010-10-20 10:18:53 -0700 | [diff] [blame] | 806 | static void handle_channel(struct wiphy *wiphy, |
| 807 | enum nl80211_reg_initiator initiator, |
| 808 | enum ieee80211_band band, |
Luis R. Rodriguez | a92a3ce | 2009-01-07 17:43:33 -0800 | [diff] [blame] | 809 | unsigned int chan_idx) |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 810 | { |
| 811 | int r; |
Luis R. Rodriguez | 038659e | 2009-05-02 00:37:17 -0400 | [diff] [blame] | 812 | u32 flags, bw_flags = 0; |
| 813 | u32 desired_bw_khz = MHZ_TO_KHZ(20); |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 814 | const struct ieee80211_reg_rule *reg_rule = NULL; |
| 815 | const struct ieee80211_power_rule *power_rule = NULL; |
Luis R. Rodriguez | 038659e | 2009-05-02 00:37:17 -0400 | [diff] [blame] | 816 | const struct ieee80211_freq_range *freq_range = NULL; |
Luis R. Rodriguez | a92a3ce | 2009-01-07 17:43:33 -0800 | [diff] [blame] | 817 | struct ieee80211_supported_band *sband; |
| 818 | struct ieee80211_channel *chan; |
Luis R. Rodriguez | fe33eb3 | 2009-02-21 00:04:30 -0500 | [diff] [blame] | 819 | struct wiphy *request_wiphy = NULL; |
Luis R. Rodriguez | a92a3ce | 2009-01-07 17:43:33 -0800 | [diff] [blame] | 820 | |
Luis R. Rodriguez | 761cf7e | 2009-02-21 00:04:25 -0500 | [diff] [blame] | 821 | assert_cfg80211_lock(); |
| 822 | |
Luis R. Rodriguez | 806a9e3 | 2009-02-21 00:04:26 -0500 | [diff] [blame] | 823 | request_wiphy = wiphy_idx_to_wiphy(last_request->wiphy_idx); |
| 824 | |
Luis R. Rodriguez | a92a3ce | 2009-01-07 17:43:33 -0800 | [diff] [blame] | 825 | sband = wiphy->bands[band]; |
| 826 | BUG_ON(chan_idx >= sband->n_channels); |
| 827 | chan = &sband->channels[chan_idx]; |
| 828 | |
| 829 | flags = chan->orig_flags; |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 830 | |
Luis R. Rodriguez | 038659e | 2009-05-02 00:37:17 -0400 | [diff] [blame] | 831 | r = freq_reg_info(wiphy, |
| 832 | MHZ_TO_KHZ(chan->center_freq), |
| 833 | desired_bw_khz, |
| 834 | ®_rule); |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 835 | |
Luis R. Rodriguez | ca4ffe8 | 2010-10-20 10:18:55 -0700 | [diff] [blame] | 836 | if (r) { |
| 837 | /* |
| 838 | * We will disable all channels that do not match our |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 839 | * received regulatory rule unless the hint is coming |
Luis R. Rodriguez | ca4ffe8 | 2010-10-20 10:18:55 -0700 | [diff] [blame] | 840 | * from a Country IE and the Country IE had no information |
| 841 | * about a band. The IEEE 802.11 spec allows for an AP |
| 842 | * to send only a subset of the regulatory rules allowed, |
| 843 | * so an AP in the US that only supports 2.4 GHz may only send |
| 844 | * a country IE with information for the 2.4 GHz band |
| 845 | * while 5 GHz is still supported. |
| 846 | */ |
| 847 | if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE && |
| 848 | r == -ERANGE) |
| 849 | return; |
| 850 | |
Luis R. Rodriguez | d91e41b | 2010-10-20 10:18:59 -0700 | [diff] [blame] | 851 | REG_DBG_PRINT("Disabling freq %d MHz\n", chan->center_freq); |
Luis R. Rodriguez | ca4ffe8 | 2010-10-20 10:18:55 -0700 | [diff] [blame] | 852 | chan->flags = IEEE80211_CHAN_DISABLED; |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 853 | return; |
Luis R. Rodriguez | ca4ffe8 | 2010-10-20 10:18:55 -0700 | [diff] [blame] | 854 | } |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 855 | |
Luis R. Rodriguez | e702d3c | 2010-10-21 19:17:04 +0530 | [diff] [blame] | 856 | chan_reg_rule_print_dbg(chan, desired_bw_khz, reg_rule); |
| 857 | |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 858 | power_rule = ®_rule->power_rule; |
Luis R. Rodriguez | 038659e | 2009-05-02 00:37:17 -0400 | [diff] [blame] | 859 | freq_range = ®_rule->freq_range; |
| 860 | |
| 861 | if (freq_range->max_bandwidth_khz < MHZ_TO_KHZ(40)) |
| 862 | bw_flags = IEEE80211_CHAN_NO_HT40; |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 863 | |
Luis R. Rodriguez | 7db90f4 | 2009-03-09 22:07:41 -0400 | [diff] [blame] | 864 | if (last_request->initiator == NL80211_REGDOM_SET_BY_DRIVER && |
Luis R. Rodriguez | 806a9e3 | 2009-02-21 00:04:26 -0500 | [diff] [blame] | 865 | request_wiphy && request_wiphy == wiphy && |
Johannes Berg | 5be83de | 2009-11-19 00:56:28 +0100 | [diff] [blame] | 866 | request_wiphy->flags & WIPHY_FLAG_STRICT_REGULATORY) { |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 867 | /* |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 868 | * This guarantees the driver's requested regulatory domain |
Luis R. Rodriguez | f976376 | 2009-01-22 15:05:52 -0800 | [diff] [blame] | 869 | * will always be used as a base for further regulatory |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 870 | * settings |
| 871 | */ |
Luis R. Rodriguez | f976376 | 2009-01-22 15:05:52 -0800 | [diff] [blame] | 872 | chan->flags = chan->orig_flags = |
Luis R. Rodriguez | 038659e | 2009-05-02 00:37:17 -0400 | [diff] [blame] | 873 | map_regdom_flags(reg_rule->flags) | bw_flags; |
Luis R. Rodriguez | f976376 | 2009-01-22 15:05:52 -0800 | [diff] [blame] | 874 | chan->max_antenna_gain = chan->orig_mag = |
| 875 | (int) MBI_TO_DBI(power_rule->max_antenna_gain); |
Luis R. Rodriguez | f976376 | 2009-01-22 15:05:52 -0800 | [diff] [blame] | 876 | chan->max_power = chan->orig_mpwr = |
| 877 | (int) MBM_TO_DBM(power_rule->max_eirp); |
| 878 | return; |
| 879 | } |
| 880 | |
Rajkumar Manoharan | aa3d7ee | 2011-09-14 14:28:17 +0530 | [diff] [blame] | 881 | chan->beacon_found = false; |
Luis R. Rodriguez | 038659e | 2009-05-02 00:37:17 -0400 | [diff] [blame] | 882 | chan->flags = flags | bw_flags | map_regdom_flags(reg_rule->flags); |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 883 | chan->max_antenna_gain = min(chan->orig_mag, |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 884 | (int) MBI_TO_DBI(power_rule->max_antenna_gain)); |
Hong Wu | eccc068 | 2012-01-11 20:33:39 +0200 | [diff] [blame] | 885 | chan->max_reg_power = (int) MBM_TO_DBM(power_rule->max_eirp); |
Mihir Shete | 2c14419 | 2013-10-13 05:25:30 +0530 | [diff] [blame^] | 886 | if (chan->orig_mpwr) { |
| 887 | /* |
| 888 | * Devices that use NL80211_COUNTRY_IE_FOLLOW_POWER will always |
| 889 | * follow the passed country IE power settings. |
| 890 | */ |
| 891 | if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE && |
| 892 | wiphy->country_ie_pref & NL80211_COUNTRY_IE_FOLLOW_POWER) |
| 893 | chan->max_power = chan->max_reg_power; |
| 894 | else |
| 895 | chan->max_power = min(chan->orig_mpwr, |
| 896 | chan->max_reg_power); |
| 897 | } else |
| 898 | chan->max_power = chan->max_reg_power; |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 899 | } |
| 900 | |
Luis R. Rodriguez | 7ca43d0 | 2010-10-20 10:18:53 -0700 | [diff] [blame] | 901 | static void handle_band(struct wiphy *wiphy, |
| 902 | enum ieee80211_band band, |
| 903 | enum nl80211_reg_initiator initiator) |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 904 | { |
Luis R. Rodriguez | a92a3ce | 2009-01-07 17:43:33 -0800 | [diff] [blame] | 905 | unsigned int i; |
| 906 | struct ieee80211_supported_band *sband; |
| 907 | |
| 908 | BUG_ON(!wiphy->bands[band]); |
| 909 | sband = wiphy->bands[band]; |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 910 | |
| 911 | for (i = 0; i < sband->n_channels; i++) |
Luis R. Rodriguez | 7ca43d0 | 2010-10-20 10:18:53 -0700 | [diff] [blame] | 912 | handle_channel(wiphy, initiator, band, i); |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 913 | } |
| 914 | |
Luis R. Rodriguez | 7db90f4 | 2009-03-09 22:07:41 -0400 | [diff] [blame] | 915 | static bool ignore_reg_update(struct wiphy *wiphy, |
| 916 | enum nl80211_reg_initiator initiator) |
Luis R. Rodriguez | 14b9815 | 2008-11-12 14:22:03 -0800 | [diff] [blame] | 917 | { |
Luis R. Rodriguez | 926a0a0 | 2010-10-21 19:17:03 +0530 | [diff] [blame] | 918 | if (!last_request) { |
Luis R. Rodriguez | d91e41b | 2010-10-20 10:18:59 -0700 | [diff] [blame] | 919 | REG_DBG_PRINT("Ignoring regulatory request %s since " |
Luis R. Rodriguez | 926a0a0 | 2010-10-21 19:17:03 +0530 | [diff] [blame] | 920 | "last_request is not set\n", |
| 921 | reg_initiator_name(initiator)); |
Luis R. Rodriguez | 14b9815 | 2008-11-12 14:22:03 -0800 | [diff] [blame] | 922 | return true; |
Luis R. Rodriguez | 926a0a0 | 2010-10-21 19:17:03 +0530 | [diff] [blame] | 923 | } |
| 924 | |
Luis R. Rodriguez | 7db90f4 | 2009-03-09 22:07:41 -0400 | [diff] [blame] | 925 | if (initiator == NL80211_REGDOM_SET_BY_CORE && |
Luis R. Rodriguez | 926a0a0 | 2010-10-21 19:17:03 +0530 | [diff] [blame] | 926 | wiphy->flags & WIPHY_FLAG_CUSTOM_REGULATORY) { |
Luis R. Rodriguez | d91e41b | 2010-10-20 10:18:59 -0700 | [diff] [blame] | 927 | REG_DBG_PRINT("Ignoring regulatory request %s " |
Luis R. Rodriguez | 926a0a0 | 2010-10-21 19:17:03 +0530 | [diff] [blame] | 928 | "since the driver uses its own custom " |
Joe Perches | 12c5ffb | 2011-07-29 14:51:25 -0700 | [diff] [blame] | 929 | "regulatory domain\n", |
Luis R. Rodriguez | 926a0a0 | 2010-10-21 19:17:03 +0530 | [diff] [blame] | 930 | reg_initiator_name(initiator)); |
Luis R. Rodriguez | 14b9815 | 2008-11-12 14:22:03 -0800 | [diff] [blame] | 931 | return true; |
Luis R. Rodriguez | 926a0a0 | 2010-10-21 19:17:03 +0530 | [diff] [blame] | 932 | } |
| 933 | |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 934 | /* |
| 935 | * wiphy->regd will be set once the device has its own |
| 936 | * desired regulatory domain set |
| 937 | */ |
Johannes Berg | 5be83de | 2009-11-19 00:56:28 +0100 | [diff] [blame] | 938 | if (wiphy->flags & WIPHY_FLAG_STRICT_REGULATORY && !wiphy->regd && |
Luis R. Rodriguez | 749b527 | 2010-10-20 10:18:54 -0700 | [diff] [blame] | 939 | initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && |
Luis R. Rodriguez | 926a0a0 | 2010-10-21 19:17:03 +0530 | [diff] [blame] | 940 | !is_world_regdom(last_request->alpha2)) { |
Luis R. Rodriguez | d91e41b | 2010-10-20 10:18:59 -0700 | [diff] [blame] | 941 | REG_DBG_PRINT("Ignoring regulatory request %s " |
Mihai Moldovan | 5bc91db | 2011-07-25 11:18:58 +0200 | [diff] [blame] | 942 | "since the driver requires its own regulatory " |
Joe Perches | 12c5ffb | 2011-07-29 14:51:25 -0700 | [diff] [blame] | 943 | "domain to be set first\n", |
Luis R. Rodriguez | 926a0a0 | 2010-10-21 19:17:03 +0530 | [diff] [blame] | 944 | reg_initiator_name(initiator)); |
Luis R. Rodriguez | 14b9815 | 2008-11-12 14:22:03 -0800 | [diff] [blame] | 945 | return true; |
Luis R. Rodriguez | 926a0a0 | 2010-10-21 19:17:03 +0530 | [diff] [blame] | 946 | } |
| 947 | |
Luis R. Rodriguez | 14b9815 | 2008-11-12 14:22:03 -0800 | [diff] [blame] | 948 | return false; |
| 949 | } |
| 950 | |
Luis R. Rodriguez | e38f8a7 | 2009-02-21 00:20:39 -0500 | [diff] [blame] | 951 | static void handle_reg_beacon(struct wiphy *wiphy, |
| 952 | unsigned int chan_idx, |
| 953 | struct reg_beacon *reg_beacon) |
| 954 | { |
Luis R. Rodriguez | e38f8a7 | 2009-02-21 00:20:39 -0500 | [diff] [blame] | 955 | struct ieee80211_supported_band *sband; |
| 956 | struct ieee80211_channel *chan; |
Luis R. Rodriguez | 6bad876 | 2009-04-02 14:08:09 -0400 | [diff] [blame] | 957 | bool channel_changed = false; |
| 958 | struct ieee80211_channel chan_before; |
Luis R. Rodriguez | e38f8a7 | 2009-02-21 00:20:39 -0500 | [diff] [blame] | 959 | |
| 960 | assert_cfg80211_lock(); |
| 961 | |
| 962 | sband = wiphy->bands[reg_beacon->chan.band]; |
| 963 | chan = &sband->channels[chan_idx]; |
| 964 | |
| 965 | if (likely(chan->center_freq != reg_beacon->chan.center_freq)) |
| 966 | return; |
| 967 | |
Luis R. Rodriguez | 6bad876 | 2009-04-02 14:08:09 -0400 | [diff] [blame] | 968 | if (chan->beacon_found) |
| 969 | return; |
| 970 | |
| 971 | chan->beacon_found = true; |
| 972 | |
Johannes Berg | 5be83de | 2009-11-19 00:56:28 +0100 | [diff] [blame] | 973 | if (wiphy->flags & WIPHY_FLAG_DISABLE_BEACON_HINTS) |
Luis R. Rodriguez | 3718424 | 2009-07-30 17:43:48 -0700 | [diff] [blame] | 974 | return; |
| 975 | |
Luis R. Rodriguez | 6bad876 | 2009-04-02 14:08:09 -0400 | [diff] [blame] | 976 | chan_before.center_freq = chan->center_freq; |
| 977 | chan_before.flags = chan->flags; |
| 978 | |
Luis R. Rodriguez | 3718424 | 2009-07-30 17:43:48 -0700 | [diff] [blame] | 979 | if (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN) { |
Luis R. Rodriguez | e38f8a7 | 2009-02-21 00:20:39 -0500 | [diff] [blame] | 980 | chan->flags &= ~IEEE80211_CHAN_PASSIVE_SCAN; |
Luis R. Rodriguez | 6bad876 | 2009-04-02 14:08:09 -0400 | [diff] [blame] | 981 | channel_changed = true; |
Luis R. Rodriguez | e38f8a7 | 2009-02-21 00:20:39 -0500 | [diff] [blame] | 982 | } |
| 983 | |
Luis R. Rodriguez | 3718424 | 2009-07-30 17:43:48 -0700 | [diff] [blame] | 984 | if (chan->flags & IEEE80211_CHAN_NO_IBSS) { |
Luis R. Rodriguez | e38f8a7 | 2009-02-21 00:20:39 -0500 | [diff] [blame] | 985 | chan->flags &= ~IEEE80211_CHAN_NO_IBSS; |
Luis R. Rodriguez | 6bad876 | 2009-04-02 14:08:09 -0400 | [diff] [blame] | 986 | channel_changed = true; |
Luis R. Rodriguez | e38f8a7 | 2009-02-21 00:20:39 -0500 | [diff] [blame] | 987 | } |
| 988 | |
Luis R. Rodriguez | 6bad876 | 2009-04-02 14:08:09 -0400 | [diff] [blame] | 989 | if (channel_changed) |
| 990 | nl80211_send_beacon_hint_event(wiphy, &chan_before, chan); |
Luis R. Rodriguez | e38f8a7 | 2009-02-21 00:20:39 -0500 | [diff] [blame] | 991 | } |
| 992 | |
| 993 | /* |
| 994 | * Called when a scan on a wiphy finds a beacon on |
| 995 | * new channel |
| 996 | */ |
| 997 | static void wiphy_update_new_beacon(struct wiphy *wiphy, |
| 998 | struct reg_beacon *reg_beacon) |
| 999 | { |
| 1000 | unsigned int i; |
| 1001 | struct ieee80211_supported_band *sband; |
| 1002 | |
| 1003 | assert_cfg80211_lock(); |
| 1004 | |
| 1005 | if (!wiphy->bands[reg_beacon->chan.band]) |
| 1006 | return; |
| 1007 | |
| 1008 | sband = wiphy->bands[reg_beacon->chan.band]; |
| 1009 | |
| 1010 | for (i = 0; i < sband->n_channels; i++) |
| 1011 | handle_reg_beacon(wiphy, i, reg_beacon); |
| 1012 | } |
| 1013 | |
| 1014 | /* |
| 1015 | * Called upon reg changes or a new wiphy is added |
| 1016 | */ |
| 1017 | static void wiphy_update_beacon_reg(struct wiphy *wiphy) |
| 1018 | { |
| 1019 | unsigned int i; |
| 1020 | struct ieee80211_supported_band *sband; |
| 1021 | struct reg_beacon *reg_beacon; |
| 1022 | |
| 1023 | assert_cfg80211_lock(); |
| 1024 | |
| 1025 | if (list_empty(®_beacon_list)) |
| 1026 | return; |
| 1027 | |
| 1028 | list_for_each_entry(reg_beacon, ®_beacon_list, list) { |
| 1029 | if (!wiphy->bands[reg_beacon->chan.band]) |
| 1030 | continue; |
| 1031 | sband = wiphy->bands[reg_beacon->chan.band]; |
| 1032 | for (i = 0; i < sband->n_channels; i++) |
| 1033 | handle_reg_beacon(wiphy, i, reg_beacon); |
| 1034 | } |
| 1035 | } |
| 1036 | |
| 1037 | static bool reg_is_world_roaming(struct wiphy *wiphy) |
| 1038 | { |
| 1039 | if (is_world_regdom(cfg80211_regdomain->alpha2) || |
| 1040 | (wiphy->regd && is_world_regdom(wiphy->regd->alpha2))) |
| 1041 | return true; |
Luis R. Rodriguez | b1ed8dd | 2009-05-02 00:34:15 -0400 | [diff] [blame] | 1042 | if (last_request && |
| 1043 | last_request->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && |
Johannes Berg | 5be83de | 2009-11-19 00:56:28 +0100 | [diff] [blame] | 1044 | wiphy->flags & WIPHY_FLAG_CUSTOM_REGULATORY) |
Luis R. Rodriguez | e38f8a7 | 2009-02-21 00:20:39 -0500 | [diff] [blame] | 1045 | return true; |
| 1046 | return false; |
| 1047 | } |
| 1048 | |
| 1049 | /* Reap the advantages of previously found beacons */ |
| 1050 | static void reg_process_beacons(struct wiphy *wiphy) |
| 1051 | { |
Luis R. Rodriguez | b1ed8dd | 2009-05-02 00:34:15 -0400 | [diff] [blame] | 1052 | /* |
| 1053 | * Means we are just firing up cfg80211, so no beacons would |
| 1054 | * have been processed yet. |
| 1055 | */ |
| 1056 | if (!last_request) |
| 1057 | return; |
Luis R. Rodriguez | e38f8a7 | 2009-02-21 00:20:39 -0500 | [diff] [blame] | 1058 | if (!reg_is_world_roaming(wiphy)) |
| 1059 | return; |
| 1060 | wiphy_update_beacon_reg(wiphy); |
| 1061 | } |
| 1062 | |
Luis R. Rodriguez | 038659e | 2009-05-02 00:37:17 -0400 | [diff] [blame] | 1063 | static bool is_ht40_not_allowed(struct ieee80211_channel *chan) |
| 1064 | { |
| 1065 | if (!chan) |
| 1066 | return true; |
| 1067 | if (chan->flags & IEEE80211_CHAN_DISABLED) |
| 1068 | return true; |
| 1069 | /* This would happen when regulatory rules disallow HT40 completely */ |
| 1070 | if (IEEE80211_CHAN_NO_HT40 == (chan->flags & (IEEE80211_CHAN_NO_HT40))) |
| 1071 | return true; |
| 1072 | return false; |
| 1073 | } |
| 1074 | |
| 1075 | static void reg_process_ht_flags_channel(struct wiphy *wiphy, |
| 1076 | enum ieee80211_band band, |
| 1077 | unsigned int chan_idx) |
| 1078 | { |
| 1079 | struct ieee80211_supported_band *sband; |
| 1080 | struct ieee80211_channel *channel; |
| 1081 | struct ieee80211_channel *channel_before = NULL, *channel_after = NULL; |
| 1082 | unsigned int i; |
| 1083 | |
| 1084 | assert_cfg80211_lock(); |
| 1085 | |
| 1086 | sband = wiphy->bands[band]; |
| 1087 | BUG_ON(chan_idx >= sband->n_channels); |
| 1088 | channel = &sband->channels[chan_idx]; |
| 1089 | |
| 1090 | if (is_ht40_not_allowed(channel)) { |
| 1091 | channel->flags |= IEEE80211_CHAN_NO_HT40; |
| 1092 | return; |
| 1093 | } |
| 1094 | |
| 1095 | /* |
| 1096 | * We need to ensure the extension channels exist to |
| 1097 | * be able to use HT40- or HT40+, this finds them (or not) |
| 1098 | */ |
| 1099 | for (i = 0; i < sband->n_channels; i++) { |
| 1100 | struct ieee80211_channel *c = &sband->channels[i]; |
| 1101 | if (c->center_freq == (channel->center_freq - 20)) |
| 1102 | channel_before = c; |
| 1103 | if (c->center_freq == (channel->center_freq + 20)) |
| 1104 | channel_after = c; |
| 1105 | } |
| 1106 | |
| 1107 | /* |
| 1108 | * Please note that this assumes target bandwidth is 20 MHz, |
| 1109 | * if that ever changes we also need to change the below logic |
| 1110 | * to include that as well. |
| 1111 | */ |
| 1112 | if (is_ht40_not_allowed(channel_before)) |
Luis R. Rodriguez | 689da1b | 2009-05-02 00:37:18 -0400 | [diff] [blame] | 1113 | channel->flags |= IEEE80211_CHAN_NO_HT40MINUS; |
Luis R. Rodriguez | 038659e | 2009-05-02 00:37:17 -0400 | [diff] [blame] | 1114 | else |
Luis R. Rodriguez | 689da1b | 2009-05-02 00:37:18 -0400 | [diff] [blame] | 1115 | channel->flags &= ~IEEE80211_CHAN_NO_HT40MINUS; |
Luis R. Rodriguez | 038659e | 2009-05-02 00:37:17 -0400 | [diff] [blame] | 1116 | |
| 1117 | if (is_ht40_not_allowed(channel_after)) |
Luis R. Rodriguez | 689da1b | 2009-05-02 00:37:18 -0400 | [diff] [blame] | 1118 | channel->flags |= IEEE80211_CHAN_NO_HT40PLUS; |
Luis R. Rodriguez | 038659e | 2009-05-02 00:37:17 -0400 | [diff] [blame] | 1119 | else |
Luis R. Rodriguez | 689da1b | 2009-05-02 00:37:18 -0400 | [diff] [blame] | 1120 | channel->flags &= ~IEEE80211_CHAN_NO_HT40PLUS; |
Luis R. Rodriguez | 038659e | 2009-05-02 00:37:17 -0400 | [diff] [blame] | 1121 | } |
| 1122 | |
| 1123 | static void reg_process_ht_flags_band(struct wiphy *wiphy, |
| 1124 | enum ieee80211_band band) |
| 1125 | { |
| 1126 | unsigned int i; |
| 1127 | struct ieee80211_supported_band *sband; |
| 1128 | |
| 1129 | BUG_ON(!wiphy->bands[band]); |
| 1130 | sband = wiphy->bands[band]; |
| 1131 | |
| 1132 | for (i = 0; i < sband->n_channels; i++) |
| 1133 | reg_process_ht_flags_channel(wiphy, band, i); |
| 1134 | } |
| 1135 | |
| 1136 | static void reg_process_ht_flags(struct wiphy *wiphy) |
| 1137 | { |
| 1138 | enum ieee80211_band band; |
| 1139 | |
| 1140 | if (!wiphy) |
| 1141 | return; |
| 1142 | |
| 1143 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) { |
| 1144 | if (wiphy->bands[band]) |
| 1145 | reg_process_ht_flags_band(wiphy, band); |
| 1146 | } |
| 1147 | |
| 1148 | } |
| 1149 | |
Sven Neumann | eac03e3 | 2011-08-30 23:38:53 +0200 | [diff] [blame] | 1150 | static void wiphy_update_regulatory(struct wiphy *wiphy, |
| 1151 | enum nl80211_reg_initiator initiator) |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 1152 | { |
| 1153 | enum ieee80211_band band; |
Luis R. Rodriguez | d46e5b1 | 2009-01-22 15:05:50 -0800 | [diff] [blame] | 1154 | |
Sven Neumann | eac03e3 | 2011-08-30 23:38:53 +0200 | [diff] [blame] | 1155 | assert_reg_lock(); |
| 1156 | |
Luis R. Rodriguez | 7db90f4 | 2009-03-09 22:07:41 -0400 | [diff] [blame] | 1157 | if (ignore_reg_update(wiphy, initiator)) |
Sven Neumann | a203c2a | 2011-07-12 15:52:07 +0200 | [diff] [blame] | 1158 | return; |
| 1159 | |
Luis R. Rodriguez | b68e6b3 | 2011-10-11 10:59:03 -0700 | [diff] [blame] | 1160 | last_request->dfs_region = cfg80211_regdomain->dfs_region; |
| 1161 | |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 1162 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) { |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 1163 | if (wiphy->bands[band]) |
Luis R. Rodriguez | 7ca43d0 | 2010-10-20 10:18:53 -0700 | [diff] [blame] | 1164 | handle_band(wiphy, band, initiator); |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 1165 | } |
Sven Neumann | a203c2a | 2011-07-12 15:52:07 +0200 | [diff] [blame] | 1166 | |
Luis R. Rodriguez | e38f8a7 | 2009-02-21 00:20:39 -0500 | [diff] [blame] | 1167 | reg_process_beacons(wiphy); |
Luis R. Rodriguez | 038659e | 2009-05-02 00:37:17 -0400 | [diff] [blame] | 1168 | reg_process_ht_flags(wiphy); |
Luis R. Rodriguez | 560e28e | 2009-01-07 17:43:32 -0800 | [diff] [blame] | 1169 | if (wiphy->reg_notifier) |
Luis R. Rodriguez | 716f939 | 2009-01-22 15:05:51 -0800 | [diff] [blame] | 1170 | wiphy->reg_notifier(wiphy, last_request); |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 1171 | } |
| 1172 | |
Sven Neumann | eac03e3 | 2011-08-30 23:38:53 +0200 | [diff] [blame] | 1173 | void regulatory_update(struct wiphy *wiphy, |
| 1174 | enum nl80211_reg_initiator setby) |
| 1175 | { |
| 1176 | mutex_lock(®_mutex); |
| 1177 | wiphy_update_regulatory(wiphy, setby); |
| 1178 | mutex_unlock(®_mutex); |
| 1179 | } |
| 1180 | |
Sven Neumann | d7549cb | 2011-08-30 23:38:54 +0200 | [diff] [blame] | 1181 | static void update_all_wiphy_regulatory(enum nl80211_reg_initiator initiator) |
| 1182 | { |
| 1183 | struct cfg80211_registered_device *rdev; |
Rajkumar Manoharan | 4a38994 | 2011-12-08 23:59:26 +0530 | [diff] [blame] | 1184 | struct wiphy *wiphy; |
Sven Neumann | d7549cb | 2011-08-30 23:38:54 +0200 | [diff] [blame] | 1185 | |
Rajkumar Manoharan | 4a38994 | 2011-12-08 23:59:26 +0530 | [diff] [blame] | 1186 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) { |
| 1187 | wiphy = &rdev->wiphy; |
| 1188 | wiphy_update_regulatory(wiphy, initiator); |
| 1189 | /* |
| 1190 | * Regulatory updates set by CORE are ignored for custom |
| 1191 | * regulatory cards. Let us notify the changes to the driver, |
| 1192 | * as some drivers used this to restore its orig_* reg domain. |
| 1193 | */ |
| 1194 | if (initiator == NL80211_REGDOM_SET_BY_CORE && |
| 1195 | wiphy->flags & WIPHY_FLAG_CUSTOM_REGULATORY && |
| 1196 | wiphy->reg_notifier) |
| 1197 | wiphy->reg_notifier(wiphy, last_request); |
| 1198 | } |
Sven Neumann | d7549cb | 2011-08-30 23:38:54 +0200 | [diff] [blame] | 1199 | } |
| 1200 | |
Luis R. Rodriguez | 1fa25e4 | 2009-01-22 15:05:44 -0800 | [diff] [blame] | 1201 | static void handle_channel_custom(struct wiphy *wiphy, |
| 1202 | enum ieee80211_band band, |
| 1203 | unsigned int chan_idx, |
| 1204 | const struct ieee80211_regdomain *regd) |
| 1205 | { |
| 1206 | int r; |
Luis R. Rodriguez | 038659e | 2009-05-02 00:37:17 -0400 | [diff] [blame] | 1207 | u32 desired_bw_khz = MHZ_TO_KHZ(20); |
| 1208 | u32 bw_flags = 0; |
Luis R. Rodriguez | 1fa25e4 | 2009-01-22 15:05:44 -0800 | [diff] [blame] | 1209 | const struct ieee80211_reg_rule *reg_rule = NULL; |
| 1210 | const struct ieee80211_power_rule *power_rule = NULL; |
Luis R. Rodriguez | 038659e | 2009-05-02 00:37:17 -0400 | [diff] [blame] | 1211 | const struct ieee80211_freq_range *freq_range = NULL; |
Luis R. Rodriguez | 1fa25e4 | 2009-01-22 15:05:44 -0800 | [diff] [blame] | 1212 | struct ieee80211_supported_band *sband; |
| 1213 | struct ieee80211_channel *chan; |
| 1214 | |
Luis R. Rodriguez | abc7381 | 2009-07-30 17:38:08 -0700 | [diff] [blame] | 1215 | assert_reg_lock(); |
Luis R. Rodriguez | ac46d48 | 2009-05-01 18:44:50 -0400 | [diff] [blame] | 1216 | |
Luis R. Rodriguez | 1fa25e4 | 2009-01-22 15:05:44 -0800 | [diff] [blame] | 1217 | sband = wiphy->bands[band]; |
| 1218 | BUG_ON(chan_idx >= sband->n_channels); |
| 1219 | chan = &sband->channels[chan_idx]; |
| 1220 | |
Luis R. Rodriguez | 038659e | 2009-05-02 00:37:17 -0400 | [diff] [blame] | 1221 | r = freq_reg_info_regd(wiphy, |
| 1222 | MHZ_TO_KHZ(chan->center_freq), |
| 1223 | desired_bw_khz, |
| 1224 | ®_rule, |
| 1225 | regd); |
Luis R. Rodriguez | 1fa25e4 | 2009-01-22 15:05:44 -0800 | [diff] [blame] | 1226 | |
| 1227 | if (r) { |
Luis R. Rodriguez | d91e41b | 2010-10-20 10:18:59 -0700 | [diff] [blame] | 1228 | REG_DBG_PRINT("Disabling freq %d MHz as custom " |
Luis R. Rodriguez | a651853 | 2010-10-20 10:18:57 -0700 | [diff] [blame] | 1229 | "regd has no rule that fits a %d MHz " |
| 1230 | "wide channel\n", |
| 1231 | chan->center_freq, |
| 1232 | KHZ_TO_MHZ(desired_bw_khz)); |
Luis R. Rodriguez | 1fa25e4 | 2009-01-22 15:05:44 -0800 | [diff] [blame] | 1233 | chan->flags = IEEE80211_CHAN_DISABLED; |
| 1234 | return; |
| 1235 | } |
| 1236 | |
Luis R. Rodriguez | e702d3c | 2010-10-21 19:17:04 +0530 | [diff] [blame] | 1237 | chan_reg_rule_print_dbg(chan, desired_bw_khz, reg_rule); |
| 1238 | |
Luis R. Rodriguez | 1fa25e4 | 2009-01-22 15:05:44 -0800 | [diff] [blame] | 1239 | power_rule = ®_rule->power_rule; |
Luis R. Rodriguez | 038659e | 2009-05-02 00:37:17 -0400 | [diff] [blame] | 1240 | freq_range = ®_rule->freq_range; |
Luis R. Rodriguez | 1fa25e4 | 2009-01-22 15:05:44 -0800 | [diff] [blame] | 1241 | |
Luis R. Rodriguez | 038659e | 2009-05-02 00:37:17 -0400 | [diff] [blame] | 1242 | if (freq_range->max_bandwidth_khz < MHZ_TO_KHZ(40)) |
| 1243 | bw_flags = IEEE80211_CHAN_NO_HT40; |
| 1244 | |
| 1245 | chan->flags |= map_regdom_flags(reg_rule->flags) | bw_flags; |
Luis R. Rodriguez | 1fa25e4 | 2009-01-22 15:05:44 -0800 | [diff] [blame] | 1246 | 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] | 1247 | chan->max_power = (int) MBM_TO_DBM(power_rule->max_eirp); |
| 1248 | } |
| 1249 | |
| 1250 | static void handle_band_custom(struct wiphy *wiphy, enum ieee80211_band band, |
| 1251 | const struct ieee80211_regdomain *regd) |
| 1252 | { |
| 1253 | unsigned int i; |
| 1254 | struct ieee80211_supported_band *sband; |
| 1255 | |
| 1256 | BUG_ON(!wiphy->bands[band]); |
| 1257 | sband = wiphy->bands[band]; |
| 1258 | |
| 1259 | for (i = 0; i < sband->n_channels; i++) |
| 1260 | handle_channel_custom(wiphy, band, i, regd); |
| 1261 | } |
| 1262 | |
| 1263 | /* Used by drivers prior to wiphy registration */ |
| 1264 | void wiphy_apply_custom_regulatory(struct wiphy *wiphy, |
| 1265 | const struct ieee80211_regdomain *regd) |
| 1266 | { |
| 1267 | enum ieee80211_band band; |
Luis R. Rodriguez | bbcf3f0 | 2009-05-19 17:49:47 -0400 | [diff] [blame] | 1268 | unsigned int bands_set = 0; |
Luis R. Rodriguez | ac46d48 | 2009-05-01 18:44:50 -0400 | [diff] [blame] | 1269 | |
Luis R. Rodriguez | abc7381 | 2009-07-30 17:38:08 -0700 | [diff] [blame] | 1270 | mutex_lock(®_mutex); |
Luis R. Rodriguez | 1fa25e4 | 2009-01-22 15:05:44 -0800 | [diff] [blame] | 1271 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) { |
Luis R. Rodriguez | bbcf3f0 | 2009-05-19 17:49:47 -0400 | [diff] [blame] | 1272 | if (!wiphy->bands[band]) |
| 1273 | continue; |
| 1274 | handle_band_custom(wiphy, band, regd); |
| 1275 | bands_set++; |
Luis R. Rodriguez | 1fa25e4 | 2009-01-22 15:05:44 -0800 | [diff] [blame] | 1276 | } |
Luis R. Rodriguez | abc7381 | 2009-07-30 17:38:08 -0700 | [diff] [blame] | 1277 | mutex_unlock(®_mutex); |
Luis R. Rodriguez | bbcf3f0 | 2009-05-19 17:49:47 -0400 | [diff] [blame] | 1278 | |
| 1279 | /* |
| 1280 | * no point in calling this if it won't have any effect |
| 1281 | * on your device's supportd bands. |
| 1282 | */ |
| 1283 | WARN_ON(!bands_set); |
Luis R. Rodriguez | 1fa25e4 | 2009-01-22 15:05:44 -0800 | [diff] [blame] | 1284 | } |
| 1285 | EXPORT_SYMBOL(wiphy_apply_custom_regulatory); |
| 1286 | |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 1287 | /* |
| 1288 | * Return value which can be used by ignore_request() to indicate |
| 1289 | * it has been determined we should intersect two regulatory domains |
| 1290 | */ |
Luis R. Rodriguez | 9c96477 | 2008-10-30 13:33:53 -0700 | [diff] [blame] | 1291 | #define REG_INTERSECT 1 |
| 1292 | |
Johannes Berg | 84fa4f4 | 2008-10-24 20:32:23 +0200 | [diff] [blame] | 1293 | /* This has the logic which determines when a new request |
| 1294 | * should be ignored. */ |
Luis R. Rodriguez | 2f92cd2 | 2009-02-21 00:24:16 -0500 | [diff] [blame] | 1295 | static int ignore_request(struct wiphy *wiphy, |
| 1296 | struct regulatory_request *pending_request) |
Johannes Berg | 84fa4f4 | 2008-10-24 20:32:23 +0200 | [diff] [blame] | 1297 | { |
Luis R. Rodriguez | 806a9e3 | 2009-02-21 00:04:26 -0500 | [diff] [blame] | 1298 | struct wiphy *last_wiphy = NULL; |
Luis R. Rodriguez | 761cf7e | 2009-02-21 00:04:25 -0500 | [diff] [blame] | 1299 | |
| 1300 | assert_cfg80211_lock(); |
| 1301 | |
Johannes Berg | 84fa4f4 | 2008-10-24 20:32:23 +0200 | [diff] [blame] | 1302 | /* All initial requests are respected */ |
| 1303 | if (!last_request) |
| 1304 | return 0; |
| 1305 | |
Luis R. Rodriguez | 2f92cd2 | 2009-02-21 00:24:16 -0500 | [diff] [blame] | 1306 | switch (pending_request->initiator) { |
Luis R. Rodriguez | 7db90f4 | 2009-03-09 22:07:41 -0400 | [diff] [blame] | 1307 | case NL80211_REGDOM_SET_BY_CORE: |
Luis R. Rodriguez | 09d989d | 2010-01-29 19:58:57 -0500 | [diff] [blame] | 1308 | return 0; |
Luis R. Rodriguez | 7db90f4 | 2009-03-09 22:07:41 -0400 | [diff] [blame] | 1309 | case NL80211_REGDOM_SET_BY_COUNTRY_IE: |
Mihir Shete | 2c14419 | 2013-10-13 05:25:30 +0530 | [diff] [blame^] | 1310 | if (wiphy->country_ie_pref & NL80211_COUNTRY_IE_IGNORE_CORE) |
| 1311 | return -EALREADY; |
Luis R. Rodriguez | 806a9e3 | 2009-02-21 00:04:26 -0500 | [diff] [blame] | 1312 | |
| 1313 | last_wiphy = wiphy_idx_to_wiphy(last_request->wiphy_idx); |
| 1314 | |
Luis R. Rodriguez | 2f92cd2 | 2009-02-21 00:24:16 -0500 | [diff] [blame] | 1315 | if (unlikely(!is_an_alpha2(pending_request->alpha2))) |
Johannes Berg | 84fa4f4 | 2008-10-24 20:32:23 +0200 | [diff] [blame] | 1316 | return -EINVAL; |
Luis R. Rodriguez | 7db90f4 | 2009-03-09 22:07:41 -0400 | [diff] [blame] | 1317 | if (last_request->initiator == |
| 1318 | NL80211_REGDOM_SET_BY_COUNTRY_IE) { |
Luis R. Rodriguez | 806a9e3 | 2009-02-21 00:04:26 -0500 | [diff] [blame] | 1319 | if (last_wiphy != wiphy) { |
Johannes Berg | 84fa4f4 | 2008-10-24 20:32:23 +0200 | [diff] [blame] | 1320 | /* |
| 1321 | * Two cards with two APs claiming different |
Thadeu Lima de Souza Cascardo | 1fe90b0 | 2009-08-11 11:18:42 -0300 | [diff] [blame] | 1322 | * Country IE alpha2s. We could |
Johannes Berg | 84fa4f4 | 2008-10-24 20:32:23 +0200 | [diff] [blame] | 1323 | * intersect them, but that seems unlikely |
| 1324 | * to be correct. Reject second one for now. |
| 1325 | */ |
Luis R. Rodriguez | 2f92cd2 | 2009-02-21 00:24:16 -0500 | [diff] [blame] | 1326 | if (regdom_changes(pending_request->alpha2)) |
Johannes Berg | 84fa4f4 | 2008-10-24 20:32:23 +0200 | [diff] [blame] | 1327 | return -EOPNOTSUPP; |
| 1328 | return -EALREADY; |
| 1329 | } |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 1330 | /* |
| 1331 | * Two consecutive Country IE hints on the same wiphy. |
| 1332 | * This should be picked up early by the driver/stack |
| 1333 | */ |
Luis R. Rodriguez | 2f92cd2 | 2009-02-21 00:24:16 -0500 | [diff] [blame] | 1334 | if (WARN_ON(regdom_changes(pending_request->alpha2))) |
Johannes Berg | 84fa4f4 | 2008-10-24 20:32:23 +0200 | [diff] [blame] | 1335 | return 0; |
| 1336 | return -EALREADY; |
| 1337 | } |
Luis R. Rodriguez | a171fba | 2010-10-18 17:44:51 -0700 | [diff] [blame] | 1338 | return 0; |
Luis R. Rodriguez | 7db90f4 | 2009-03-09 22:07:41 -0400 | [diff] [blame] | 1339 | case NL80211_REGDOM_SET_BY_DRIVER: |
| 1340 | if (last_request->initiator == NL80211_REGDOM_SET_BY_CORE) { |
Luis R. Rodriguez | 2f92cd2 | 2009-02-21 00:24:16 -0500 | [diff] [blame] | 1341 | if (regdom_changes(pending_request->alpha2)) |
Luis R. Rodriguez | e74b1e7 | 2009-01-22 15:05:48 -0800 | [diff] [blame] | 1342 | return 0; |
Johannes Berg | 84fa4f4 | 2008-10-24 20:32:23 +0200 | [diff] [blame] | 1343 | return -EALREADY; |
Luis R. Rodriguez | e74b1e7 | 2009-01-22 15:05:48 -0800 | [diff] [blame] | 1344 | } |
Luis R. Rodriguez | fff32c0 | 2009-02-21 00:04:32 -0500 | [diff] [blame] | 1345 | |
| 1346 | /* |
| 1347 | * This would happen if you unplug and plug your card |
| 1348 | * back in or if you add a new device for which the previously |
| 1349 | * loaded card also agrees on the regulatory domain. |
| 1350 | */ |
Luis R. Rodriguez | 7db90f4 | 2009-03-09 22:07:41 -0400 | [diff] [blame] | 1351 | if (last_request->initiator == NL80211_REGDOM_SET_BY_DRIVER && |
Luis R. Rodriguez | 2f92cd2 | 2009-02-21 00:24:16 -0500 | [diff] [blame] | 1352 | !regdom_changes(pending_request->alpha2)) |
Luis R. Rodriguez | fff32c0 | 2009-02-21 00:04:32 -0500 | [diff] [blame] | 1353 | return -EALREADY; |
| 1354 | |
Luis R. Rodriguez | 3e0c3ff | 2009-01-07 17:43:34 -0800 | [diff] [blame] | 1355 | return REG_INTERSECT; |
Luis R. Rodriguez | 7db90f4 | 2009-03-09 22:07:41 -0400 | [diff] [blame] | 1356 | case NL80211_REGDOM_SET_BY_USER: |
| 1357 | if (last_request->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) |
Luis R. Rodriguez | 9c96477 | 2008-10-30 13:33:53 -0700 | [diff] [blame] | 1358 | return REG_INTERSECT; |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 1359 | /* |
| 1360 | * If the user knows better the user should set the regdom |
| 1361 | * to their country before the IE is picked up |
| 1362 | */ |
Luis R. Rodriguez | 7db90f4 | 2009-03-09 22:07:41 -0400 | [diff] [blame] | 1363 | if (last_request->initiator == NL80211_REGDOM_SET_BY_USER && |
Luis R. Rodriguez | 3f2355c | 2008-11-12 14:22:02 -0800 | [diff] [blame] | 1364 | last_request->intersect) |
| 1365 | return -EOPNOTSUPP; |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 1366 | /* |
| 1367 | * Process user requests only after previous user/driver/core |
| 1368 | * requests have been processed |
| 1369 | */ |
Luis R. Rodriguez | 7db90f4 | 2009-03-09 22:07:41 -0400 | [diff] [blame] | 1370 | if (last_request->initiator == NL80211_REGDOM_SET_BY_CORE || |
| 1371 | last_request->initiator == NL80211_REGDOM_SET_BY_DRIVER || |
| 1372 | last_request->initiator == NL80211_REGDOM_SET_BY_USER) { |
Luis R. Rodriguez | 69b1572 | 2009-02-21 00:04:33 -0500 | [diff] [blame] | 1373 | if (regdom_changes(last_request->alpha2)) |
Luis R. Rodriguez | 5eebade | 2009-01-22 15:05:47 -0800 | [diff] [blame] | 1374 | return -EAGAIN; |
| 1375 | } |
| 1376 | |
John W. Linville | baeb66f | 2009-12-18 17:59:02 -0500 | [diff] [blame] | 1377 | if (!regdom_changes(pending_request->alpha2)) |
Luis R. Rodriguez | e74b1e7 | 2009-01-22 15:05:48 -0800 | [diff] [blame] | 1378 | return -EALREADY; |
| 1379 | |
Johannes Berg | 84fa4f4 | 2008-10-24 20:32:23 +0200 | [diff] [blame] | 1380 | return 0; |
| 1381 | } |
| 1382 | |
| 1383 | return -EINVAL; |
| 1384 | } |
| 1385 | |
Luis R. Rodriguez | b2e253c | 2010-11-17 21:46:09 -0800 | [diff] [blame] | 1386 | static void reg_set_request_processed(void) |
| 1387 | { |
| 1388 | bool need_more_processing = false; |
| 1389 | |
| 1390 | last_request->processed = true; |
| 1391 | |
| 1392 | spin_lock(®_requests_lock); |
| 1393 | if (!list_empty(®_requests_list)) |
| 1394 | need_more_processing = true; |
| 1395 | spin_unlock(®_requests_lock); |
| 1396 | |
Luis R. Rodriguez | a90c7a3 | 2011-04-05 10:49:04 -0700 | [diff] [blame] | 1397 | if (last_request->initiator == NL80211_REGDOM_SET_BY_USER) |
| 1398 | cancel_delayed_work_sync(®_timeout); |
| 1399 | |
Luis R. Rodriguez | b2e253c | 2010-11-17 21:46:09 -0800 | [diff] [blame] | 1400 | if (need_more_processing) |
| 1401 | schedule_work(®_work); |
| 1402 | } |
| 1403 | |
Luis R. Rodriguez | d1c96a9 | 2009-02-21 00:24:13 -0500 | [diff] [blame] | 1404 | /** |
| 1405 | * __regulatory_hint - hint to the wireless core a regulatory domain |
| 1406 | * @wiphy: if the hint comes from country information from an AP, this |
| 1407 | * 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] | 1408 | * @pending_request: the regulatory request currently being processed |
Luis R. Rodriguez | d1c96a9 | 2009-02-21 00:24:13 -0500 | [diff] [blame] | 1409 | * |
| 1410 | * 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] | 1411 | * what it believes should be the current regulatory domain. |
Luis R. Rodriguez | d1c96a9 | 2009-02-21 00:24:13 -0500 | [diff] [blame] | 1412 | * |
| 1413 | * Returns zero if all went fine, %-EALREADY if a regulatory domain had |
| 1414 | * already been set or other standard error codes. |
| 1415 | * |
Luis R. Rodriguez | abc7381 | 2009-07-30 17:38:08 -0700 | [diff] [blame] | 1416 | * Caller must hold &cfg80211_mutex and ®_mutex |
Luis R. Rodriguez | d1c96a9 | 2009-02-21 00:24:13 -0500 | [diff] [blame] | 1417 | */ |
Luis R. Rodriguez | 28da32d | 2009-02-21 00:24:14 -0500 | [diff] [blame] | 1418 | static int __regulatory_hint(struct wiphy *wiphy, |
| 1419 | struct regulatory_request *pending_request) |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 1420 | { |
Luis R. Rodriguez | 9c96477 | 2008-10-30 13:33:53 -0700 | [diff] [blame] | 1421 | bool intersect = false; |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 1422 | int r = 0; |
| 1423 | |
Luis R. Rodriguez | 761cf7e | 2009-02-21 00:04:25 -0500 | [diff] [blame] | 1424 | assert_cfg80211_lock(); |
| 1425 | |
Luis R. Rodriguez | 2f92cd2 | 2009-02-21 00:24:16 -0500 | [diff] [blame] | 1426 | r = ignore_request(wiphy, pending_request); |
Luis R. Rodriguez | 9c96477 | 2008-10-30 13:33:53 -0700 | [diff] [blame] | 1427 | |
Luis R. Rodriguez | 3e0c3ff | 2009-01-07 17:43:34 -0800 | [diff] [blame] | 1428 | if (r == REG_INTERSECT) { |
Luis R. Rodriguez | 7db90f4 | 2009-03-09 22:07:41 -0400 | [diff] [blame] | 1429 | if (pending_request->initiator == |
| 1430 | NL80211_REGDOM_SET_BY_DRIVER) { |
Luis R. Rodriguez | 3e0c3ff | 2009-01-07 17:43:34 -0800 | [diff] [blame] | 1431 | r = reg_copy_regd(&wiphy->regd, cfg80211_regdomain); |
Luis R. Rodriguez | d951c1d | 2009-02-21 00:24:15 -0500 | [diff] [blame] | 1432 | if (r) { |
| 1433 | kfree(pending_request); |
Luis R. Rodriguez | 3e0c3ff | 2009-01-07 17:43:34 -0800 | [diff] [blame] | 1434 | return r; |
Luis R. Rodriguez | d951c1d | 2009-02-21 00:24:15 -0500 | [diff] [blame] | 1435 | } |
Luis R. Rodriguez | 3e0c3ff | 2009-01-07 17:43:34 -0800 | [diff] [blame] | 1436 | } |
Luis R. Rodriguez | 9c96477 | 2008-10-30 13:33:53 -0700 | [diff] [blame] | 1437 | intersect = true; |
Luis R. Rodriguez | 3e0c3ff | 2009-01-07 17:43:34 -0800 | [diff] [blame] | 1438 | } else if (r) { |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 1439 | /* |
| 1440 | * If the regulatory domain being requested by the |
Luis R. Rodriguez | 3e0c3ff | 2009-01-07 17:43:34 -0800 | [diff] [blame] | 1441 | * driver has already been set just copy it to the |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 1442 | * wiphy |
| 1443 | */ |
Luis R. Rodriguez | 28da32d | 2009-02-21 00:24:14 -0500 | [diff] [blame] | 1444 | if (r == -EALREADY && |
Luis R. Rodriguez | 7db90f4 | 2009-03-09 22:07:41 -0400 | [diff] [blame] | 1445 | pending_request->initiator == |
| 1446 | NL80211_REGDOM_SET_BY_DRIVER) { |
Luis R. Rodriguez | 3e0c3ff | 2009-01-07 17:43:34 -0800 | [diff] [blame] | 1447 | r = reg_copy_regd(&wiphy->regd, cfg80211_regdomain); |
Luis R. Rodriguez | d951c1d | 2009-02-21 00:24:15 -0500 | [diff] [blame] | 1448 | if (r) { |
| 1449 | kfree(pending_request); |
Luis R. Rodriguez | 3e0c3ff | 2009-01-07 17:43:34 -0800 | [diff] [blame] | 1450 | return r; |
Luis R. Rodriguez | d951c1d | 2009-02-21 00:24:15 -0500 | [diff] [blame] | 1451 | } |
Luis R. Rodriguez | 3e0c3ff | 2009-01-07 17:43:34 -0800 | [diff] [blame] | 1452 | r = -EALREADY; |
| 1453 | goto new_request; |
| 1454 | } |
Luis R. Rodriguez | d951c1d | 2009-02-21 00:24:15 -0500 | [diff] [blame] | 1455 | kfree(pending_request); |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 1456 | return r; |
Luis R. Rodriguez | 3e0c3ff | 2009-01-07 17:43:34 -0800 | [diff] [blame] | 1457 | } |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 1458 | |
Luis R. Rodriguez | 3e0c3ff | 2009-01-07 17:43:34 -0800 | [diff] [blame] | 1459 | new_request: |
Luis R. Rodriguez | a042994 | 2011-11-28 16:47:15 -0500 | [diff] [blame] | 1460 | if (last_request != &core_request_world) |
| 1461 | kfree(last_request); |
Luis R. Rodriguez | d951c1d | 2009-02-21 00:24:15 -0500 | [diff] [blame] | 1462 | |
| 1463 | last_request = pending_request; |
| 1464 | last_request->intersect = intersect; |
| 1465 | |
| 1466 | pending_request = NULL; |
Luis R. Rodriguez | 3e0c3ff | 2009-01-07 17:43:34 -0800 | [diff] [blame] | 1467 | |
Luis R. Rodriguez | 09d989d | 2010-01-29 19:58:57 -0500 | [diff] [blame] | 1468 | if (last_request->initiator == NL80211_REGDOM_SET_BY_USER) { |
| 1469 | user_alpha2[0] = last_request->alpha2[0]; |
| 1470 | user_alpha2[1] = last_request->alpha2[1]; |
| 1471 | } |
| 1472 | |
Luis R. Rodriguez | 3e0c3ff | 2009-01-07 17:43:34 -0800 | [diff] [blame] | 1473 | /* When r == REG_INTERSECT we do need to call CRDA */ |
Luis R. Rodriguez | 73d54c9 | 2009-03-09 22:07:42 -0400 | [diff] [blame] | 1474 | if (r < 0) { |
| 1475 | /* |
| 1476 | * Since CRDA will not be called in this case as we already |
| 1477 | * have applied the requested regulatory domain before we just |
| 1478 | * inform userspace we have processed the request |
| 1479 | */ |
Luis R. Rodriguez | b2e253c | 2010-11-17 21:46:09 -0800 | [diff] [blame] | 1480 | if (r == -EALREADY) { |
Luis R. Rodriguez | 73d54c9 | 2009-03-09 22:07:42 -0400 | [diff] [blame] | 1481 | nl80211_send_reg_change_event(last_request); |
Luis R. Rodriguez | b2e253c | 2010-11-17 21:46:09 -0800 | [diff] [blame] | 1482 | reg_set_request_processed(); |
| 1483 | } |
Luis R. Rodriguez | 3e0c3ff | 2009-01-07 17:43:34 -0800 | [diff] [blame] | 1484 | return r; |
Luis R. Rodriguez | 73d54c9 | 2009-03-09 22:07:42 -0400 | [diff] [blame] | 1485 | } |
Luis R. Rodriguez | 3e0c3ff | 2009-01-07 17:43:34 -0800 | [diff] [blame] | 1486 | |
Luis R. Rodriguez | d951c1d | 2009-02-21 00:24:15 -0500 | [diff] [blame] | 1487 | return call_crda(last_request->alpha2); |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 1488 | } |
| 1489 | |
Luis R. Rodriguez | 30a548c | 2009-05-02 01:17:27 -0400 | [diff] [blame] | 1490 | /* This processes *all* regulatory hints */ |
Luis R. Rodriguez | 8848bef | 2011-12-20 12:23:36 -0800 | [diff] [blame] | 1491 | static void reg_process_hint(struct regulatory_request *reg_request, |
| 1492 | enum nl80211_reg_initiator reg_initiator) |
Luis R. Rodriguez | fe33eb3 | 2009-02-21 00:04:30 -0500 | [diff] [blame] | 1493 | { |
| 1494 | int r = 0; |
| 1495 | struct wiphy *wiphy = NULL; |
| 1496 | |
| 1497 | BUG_ON(!reg_request->alpha2); |
| 1498 | |
Luis R. Rodriguez | fe33eb3 | 2009-02-21 00:04:30 -0500 | [diff] [blame] | 1499 | if (wiphy_idx_valid(reg_request->wiphy_idx)) |
| 1500 | wiphy = wiphy_idx_to_wiphy(reg_request->wiphy_idx); |
| 1501 | |
Luis R. Rodriguez | 8848bef | 2011-12-20 12:23:36 -0800 | [diff] [blame] | 1502 | if (reg_initiator == NL80211_REGDOM_SET_BY_DRIVER && |
Luis R. Rodriguez | fe33eb3 | 2009-02-21 00:04:30 -0500 | [diff] [blame] | 1503 | !wiphy) { |
Luis R. Rodriguez | d951c1d | 2009-02-21 00:24:15 -0500 | [diff] [blame] | 1504 | kfree(reg_request); |
Luis R. Rodriguez | b0e2880 | 2010-11-17 21:46:08 -0800 | [diff] [blame] | 1505 | return; |
Luis R. Rodriguez | fe33eb3 | 2009-02-21 00:04:30 -0500 | [diff] [blame] | 1506 | } |
| 1507 | |
Luis R. Rodriguez | 28da32d | 2009-02-21 00:24:14 -0500 | [diff] [blame] | 1508 | r = __regulatory_hint(wiphy, reg_request); |
Luis R. Rodriguez | fe33eb3 | 2009-02-21 00:04:30 -0500 | [diff] [blame] | 1509 | /* This is required so that the orig_* parameters are saved */ |
Johannes Berg | 5be83de | 2009-11-19 00:56:28 +0100 | [diff] [blame] | 1510 | if (r == -EALREADY && wiphy && |
Luis R. Rodriguez | a90c7a3 | 2011-04-05 10:49:04 -0700 | [diff] [blame] | 1511 | wiphy->flags & WIPHY_FLAG_STRICT_REGULATORY) { |
Luis R. Rodriguez | 8848bef | 2011-12-20 12:23:36 -0800 | [diff] [blame] | 1512 | wiphy_update_regulatory(wiphy, reg_initiator); |
Luis R. Rodriguez | a90c7a3 | 2011-04-05 10:49:04 -0700 | [diff] [blame] | 1513 | return; |
| 1514 | } |
| 1515 | |
| 1516 | /* |
| 1517 | * We only time out user hints, given that they should be the only |
| 1518 | * source of bogus requests. |
| 1519 | */ |
Luis R. Rodriguez | c989bb1 | 2011-04-25 18:35:48 -0700 | [diff] [blame] | 1520 | if (r != -EALREADY && |
Luis R. Rodriguez | 8848bef | 2011-12-20 12:23:36 -0800 | [diff] [blame] | 1521 | reg_initiator == NL80211_REGDOM_SET_BY_USER) |
Luis R. Rodriguez | a90c7a3 | 2011-04-05 10:49:04 -0700 | [diff] [blame] | 1522 | schedule_delayed_work(®_timeout, msecs_to_jiffies(3142)); |
Luis R. Rodriguez | fe33eb3 | 2009-02-21 00:04:30 -0500 | [diff] [blame] | 1523 | } |
| 1524 | |
Luis R. Rodriguez | b2e253c | 2010-11-17 21:46:09 -0800 | [diff] [blame] | 1525 | /* |
| 1526 | * Processes regulatory hints, this is all the NL80211_REGDOM_SET_BY_* |
| 1527 | * Regulatory hints come on a first come first serve basis and we |
| 1528 | * must process each one atomically. |
| 1529 | */ |
Luis R. Rodriguez | fe33eb3 | 2009-02-21 00:04:30 -0500 | [diff] [blame] | 1530 | static void reg_process_pending_hints(void) |
Luis R. Rodriguez | b0e2880 | 2010-11-17 21:46:08 -0800 | [diff] [blame] | 1531 | { |
Luis R. Rodriguez | fe33eb3 | 2009-02-21 00:04:30 -0500 | [diff] [blame] | 1532 | struct regulatory_request *reg_request; |
Luis R. Rodriguez | fe33eb3 | 2009-02-21 00:04:30 -0500 | [diff] [blame] | 1533 | |
Luis R. Rodriguez | b0e2880 | 2010-11-17 21:46:08 -0800 | [diff] [blame] | 1534 | mutex_lock(&cfg80211_mutex); |
| 1535 | mutex_lock(®_mutex); |
| 1536 | |
Luis R. Rodriguez | b2e253c | 2010-11-17 21:46:09 -0800 | [diff] [blame] | 1537 | /* When last_request->processed becomes true this will be rescheduled */ |
| 1538 | if (last_request && !last_request->processed) { |
| 1539 | REG_DBG_PRINT("Pending regulatory request, waiting " |
Joe Perches | 12c5ffb | 2011-07-29 14:51:25 -0700 | [diff] [blame] | 1540 | "for it to be processed...\n"); |
Luis R. Rodriguez | b2e253c | 2010-11-17 21:46:09 -0800 | [diff] [blame] | 1541 | goto out; |
Luis R. Rodriguez | fe33eb3 | 2009-02-21 00:04:30 -0500 | [diff] [blame] | 1542 | } |
Luis R. Rodriguez | b2e253c | 2010-11-17 21:46:09 -0800 | [diff] [blame] | 1543 | |
| 1544 | spin_lock(®_requests_lock); |
| 1545 | |
| 1546 | if (list_empty(®_requests_list)) { |
| 1547 | spin_unlock(®_requests_lock); |
| 1548 | goto out; |
| 1549 | } |
| 1550 | |
| 1551 | reg_request = list_first_entry(®_requests_list, |
| 1552 | struct regulatory_request, |
| 1553 | list); |
| 1554 | list_del_init(®_request->list); |
| 1555 | |
Luis R. Rodriguez | fe33eb3 | 2009-02-21 00:04:30 -0500 | [diff] [blame] | 1556 | spin_unlock(®_requests_lock); |
Luis R. Rodriguez | b0e2880 | 2010-11-17 21:46:08 -0800 | [diff] [blame] | 1557 | |
Luis R. Rodriguez | 8848bef | 2011-12-20 12:23:36 -0800 | [diff] [blame] | 1558 | reg_process_hint(reg_request, reg_request->initiator); |
Luis R. Rodriguez | b2e253c | 2010-11-17 21:46:09 -0800 | [diff] [blame] | 1559 | |
| 1560 | out: |
Luis R. Rodriguez | b0e2880 | 2010-11-17 21:46:08 -0800 | [diff] [blame] | 1561 | mutex_unlock(®_mutex); |
| 1562 | mutex_unlock(&cfg80211_mutex); |
Luis R. Rodriguez | fe33eb3 | 2009-02-21 00:04:30 -0500 | [diff] [blame] | 1563 | } |
| 1564 | |
Luis R. Rodriguez | e38f8a7 | 2009-02-21 00:20:39 -0500 | [diff] [blame] | 1565 | /* Processes beacon hints -- this has nothing to do with country IEs */ |
| 1566 | static void reg_process_pending_beacon_hints(void) |
| 1567 | { |
Johannes Berg | 79c97e9 | 2009-07-07 03:56:12 +0200 | [diff] [blame] | 1568 | struct cfg80211_registered_device *rdev; |
Luis R. Rodriguez | e38f8a7 | 2009-02-21 00:20:39 -0500 | [diff] [blame] | 1569 | struct reg_beacon *pending_beacon, *tmp; |
| 1570 | |
Luis R. Rodriguez | abc7381 | 2009-07-30 17:38:08 -0700 | [diff] [blame] | 1571 | /* |
| 1572 | * No need to hold the reg_mutex here as we just touch wiphys |
| 1573 | * and do not read or access regulatory variables. |
| 1574 | */ |
Luis R. Rodriguez | e38f8a7 | 2009-02-21 00:20:39 -0500 | [diff] [blame] | 1575 | mutex_lock(&cfg80211_mutex); |
| 1576 | |
| 1577 | /* This goes through the _pending_ beacon list */ |
| 1578 | spin_lock_bh(®_pending_beacons_lock); |
| 1579 | |
| 1580 | if (list_empty(®_pending_beacons)) { |
| 1581 | spin_unlock_bh(®_pending_beacons_lock); |
| 1582 | goto out; |
| 1583 | } |
| 1584 | |
| 1585 | list_for_each_entry_safe(pending_beacon, tmp, |
| 1586 | ®_pending_beacons, list) { |
| 1587 | |
| 1588 | list_del_init(&pending_beacon->list); |
| 1589 | |
| 1590 | /* Applies the beacon hint to current wiphys */ |
Johannes Berg | 79c97e9 | 2009-07-07 03:56:12 +0200 | [diff] [blame] | 1591 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) |
| 1592 | wiphy_update_new_beacon(&rdev->wiphy, pending_beacon); |
Luis R. Rodriguez | e38f8a7 | 2009-02-21 00:20:39 -0500 | [diff] [blame] | 1593 | |
| 1594 | /* Remembers the beacon hint for new wiphys or reg changes */ |
| 1595 | list_add_tail(&pending_beacon->list, ®_beacon_list); |
| 1596 | } |
| 1597 | |
| 1598 | spin_unlock_bh(®_pending_beacons_lock); |
| 1599 | out: |
| 1600 | mutex_unlock(&cfg80211_mutex); |
| 1601 | } |
| 1602 | |
Luis R. Rodriguez | fe33eb3 | 2009-02-21 00:04:30 -0500 | [diff] [blame] | 1603 | static void reg_todo(struct work_struct *work) |
| 1604 | { |
| 1605 | reg_process_pending_hints(); |
Luis R. Rodriguez | e38f8a7 | 2009-02-21 00:20:39 -0500 | [diff] [blame] | 1606 | reg_process_pending_beacon_hints(); |
Luis R. Rodriguez | fe33eb3 | 2009-02-21 00:04:30 -0500 | [diff] [blame] | 1607 | } |
| 1608 | |
Luis R. Rodriguez | fe33eb3 | 2009-02-21 00:04:30 -0500 | [diff] [blame] | 1609 | static void queue_regulatory_request(struct regulatory_request *request) |
| 1610 | { |
John W. Linville | c61029c | 2010-08-05 14:26:24 -0400 | [diff] [blame] | 1611 | if (isalpha(request->alpha2[0])) |
| 1612 | request->alpha2[0] = toupper(request->alpha2[0]); |
| 1613 | if (isalpha(request->alpha2[1])) |
| 1614 | request->alpha2[1] = toupper(request->alpha2[1]); |
| 1615 | |
Luis R. Rodriguez | fe33eb3 | 2009-02-21 00:04:30 -0500 | [diff] [blame] | 1616 | spin_lock(®_requests_lock); |
| 1617 | list_add_tail(&request->list, ®_requests_list); |
| 1618 | spin_unlock(®_requests_lock); |
| 1619 | |
| 1620 | schedule_work(®_work); |
| 1621 | } |
| 1622 | |
Luis R. Rodriguez | 09d989d | 2010-01-29 19:58:57 -0500 | [diff] [blame] | 1623 | /* |
| 1624 | * Core regulatory hint -- happens during cfg80211_init() |
| 1625 | * and when we restore regulatory settings. |
| 1626 | */ |
Luis R. Rodriguez | ba25c14 | 2009-02-21 00:04:23 -0500 | [diff] [blame] | 1627 | static int regulatory_hint_core(const char *alpha2) |
| 1628 | { |
| 1629 | struct regulatory_request *request; |
| 1630 | |
Luis R. Rodriguez | ba25c14 | 2009-02-21 00:04:23 -0500 | [diff] [blame] | 1631 | request = kzalloc(sizeof(struct regulatory_request), |
| 1632 | GFP_KERNEL); |
| 1633 | if (!request) |
| 1634 | return -ENOMEM; |
| 1635 | |
| 1636 | request->alpha2[0] = alpha2[0]; |
| 1637 | request->alpha2[1] = alpha2[1]; |
Luis R. Rodriguez | 7db90f4 | 2009-03-09 22:07:41 -0400 | [diff] [blame] | 1638 | request->initiator = NL80211_REGDOM_SET_BY_CORE; |
Luis R. Rodriguez | ba25c14 | 2009-02-21 00:04:23 -0500 | [diff] [blame] | 1639 | |
Luis R. Rodriguez | 31e9972 | 2010-11-17 21:46:06 -0800 | [diff] [blame] | 1640 | queue_regulatory_request(request); |
Luis R. Rodriguez | 5078b2e | 2009-05-13 17:04:42 -0400 | [diff] [blame] | 1641 | |
Luis R. Rodriguez | fe33eb3 | 2009-02-21 00:04:30 -0500 | [diff] [blame] | 1642 | return 0; |
Luis R. Rodriguez | ba25c14 | 2009-02-21 00:04:23 -0500 | [diff] [blame] | 1643 | } |
| 1644 | |
Luis R. Rodriguez | fe33eb3 | 2009-02-21 00:04:30 -0500 | [diff] [blame] | 1645 | /* User hints */ |
| 1646 | int regulatory_hint_user(const char *alpha2) |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 1647 | { |
Luis R. Rodriguez | fe33eb3 | 2009-02-21 00:04:30 -0500 | [diff] [blame] | 1648 | struct regulatory_request *request; |
| 1649 | |
Johannes Berg | be3d481 | 2008-10-24 20:32:21 +0200 | [diff] [blame] | 1650 | BUG_ON(!alpha2); |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 1651 | |
Luis R. Rodriguez | fe33eb3 | 2009-02-21 00:04:30 -0500 | [diff] [blame] | 1652 | request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); |
| 1653 | if (!request) |
| 1654 | return -ENOMEM; |
| 1655 | |
| 1656 | request->wiphy_idx = WIPHY_IDX_STALE; |
| 1657 | request->alpha2[0] = alpha2[0]; |
| 1658 | request->alpha2[1] = alpha2[1]; |
Luis R. Rodriguez | e12822e | 2010-01-04 11:37:39 -0500 | [diff] [blame] | 1659 | request->initiator = NL80211_REGDOM_SET_BY_USER; |
Luis R. Rodriguez | fe33eb3 | 2009-02-21 00:04:30 -0500 | [diff] [blame] | 1660 | |
| 1661 | queue_regulatory_request(request); |
| 1662 | |
| 1663 | return 0; |
| 1664 | } |
| 1665 | |
| 1666 | /* Driver hints */ |
| 1667 | int regulatory_hint(struct wiphy *wiphy, const char *alpha2) |
| 1668 | { |
| 1669 | struct regulatory_request *request; |
| 1670 | |
| 1671 | BUG_ON(!alpha2); |
| 1672 | BUG_ON(!wiphy); |
| 1673 | |
| 1674 | request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); |
| 1675 | if (!request) |
| 1676 | return -ENOMEM; |
| 1677 | |
| 1678 | request->wiphy_idx = get_wiphy_idx(wiphy); |
| 1679 | |
| 1680 | /* Must have registered wiphy first */ |
| 1681 | BUG_ON(!wiphy_idx_valid(request->wiphy_idx)); |
| 1682 | |
| 1683 | request->alpha2[0] = alpha2[0]; |
| 1684 | request->alpha2[1] = alpha2[1]; |
Luis R. Rodriguez | 7db90f4 | 2009-03-09 22:07:41 -0400 | [diff] [blame] | 1685 | request->initiator = NL80211_REGDOM_SET_BY_DRIVER; |
Luis R. Rodriguez | fe33eb3 | 2009-02-21 00:04:30 -0500 | [diff] [blame] | 1686 | |
| 1687 | queue_regulatory_request(request); |
| 1688 | |
| 1689 | return 0; |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 1690 | } |
| 1691 | EXPORT_SYMBOL(regulatory_hint); |
| 1692 | |
Luis R. Rodriguez | 4b44c8b | 2009-07-30 17:38:07 -0700 | [diff] [blame] | 1693 | /* |
| 1694 | * We hold wdev_lock() here so we cannot hold cfg80211_mutex() and |
| 1695 | * therefore cannot iterate over the rdev list here. |
| 1696 | */ |
Luis R. Rodriguez | 3f2355c | 2008-11-12 14:22:02 -0800 | [diff] [blame] | 1697 | void regulatory_hint_11d(struct wiphy *wiphy, |
Luis R. Rodriguez | 84920e3 | 2010-01-14 20:08:20 -0500 | [diff] [blame] | 1698 | enum ieee80211_band band, |
| 1699 | u8 *country_ie, |
| 1700 | u8 country_ie_len) |
Luis R. Rodriguez | 3f2355c | 2008-11-12 14:22:02 -0800 | [diff] [blame] | 1701 | { |
Luis R. Rodriguez | 3f2355c | 2008-11-12 14:22:02 -0800 | [diff] [blame] | 1702 | char alpha2[2]; |
Luis R. Rodriguez | 3f2355c | 2008-11-12 14:22:02 -0800 | [diff] [blame] | 1703 | enum environment_cap env = ENVIRON_ANY; |
Luis R. Rodriguez | fe33eb3 | 2009-02-21 00:04:30 -0500 | [diff] [blame] | 1704 | struct regulatory_request *request; |
Luis R. Rodriguez | 3f2355c | 2008-11-12 14:22:02 -0800 | [diff] [blame] | 1705 | |
Luis R. Rodriguez | abc7381 | 2009-07-30 17:38:08 -0700 | [diff] [blame] | 1706 | mutex_lock(®_mutex); |
Luis R. Rodriguez | 3f2355c | 2008-11-12 14:22:02 -0800 | [diff] [blame] | 1707 | |
Luis R. Rodriguez | 9828b01 | 2009-07-30 17:38:06 -0700 | [diff] [blame] | 1708 | if (unlikely(!last_request)) |
| 1709 | goto out; |
Luis R. Rodriguez | d335fe6 | 2009-02-21 00:04:27 -0500 | [diff] [blame] | 1710 | |
Luis R. Rodriguez | 3f2355c | 2008-11-12 14:22:02 -0800 | [diff] [blame] | 1711 | /* IE len must be evenly divisible by 2 */ |
| 1712 | if (country_ie_len & 0x01) |
| 1713 | goto out; |
| 1714 | |
| 1715 | if (country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN) |
| 1716 | goto out; |
| 1717 | |
Luis R. Rodriguez | 3f2355c | 2008-11-12 14:22:02 -0800 | [diff] [blame] | 1718 | alpha2[0] = country_ie[0]; |
| 1719 | alpha2[1] = country_ie[1]; |
| 1720 | |
| 1721 | if (country_ie[2] == 'I') |
| 1722 | env = ENVIRON_INDOOR; |
| 1723 | else if (country_ie[2] == 'O') |
| 1724 | env = ENVIRON_OUTDOOR; |
| 1725 | |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 1726 | /* |
Luis R. Rodriguez | 8b19e6c | 2009-07-30 17:38:09 -0700 | [diff] [blame] | 1727 | * We will run this only upon a successful connection on cfg80211. |
Luis R. Rodriguez | 4b44c8b | 2009-07-30 17:38:07 -0700 | [diff] [blame] | 1728 | * We leave conflict resolution to the workqueue, where can hold |
| 1729 | * cfg80211_mutex. |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 1730 | */ |
Luis R. Rodriguez | cc0b6fe | 2009-03-20 23:53:05 -0400 | [diff] [blame] | 1731 | if (likely(last_request->initiator == |
| 1732 | NL80211_REGDOM_SET_BY_COUNTRY_IE && |
Luis R. Rodriguez | 4b44c8b | 2009-07-30 17:38:07 -0700 | [diff] [blame] | 1733 | wiphy_idx_valid(last_request->wiphy_idx))) |
| 1734 | goto out; |
Luis R. Rodriguez | 3f2355c | 2008-11-12 14:22:02 -0800 | [diff] [blame] | 1735 | |
Luis R. Rodriguez | fe33eb3 | 2009-02-21 00:04:30 -0500 | [diff] [blame] | 1736 | request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); |
| 1737 | if (!request) |
Dan Carpenter | f9f9b6e | 2010-07-22 13:26:50 +0200 | [diff] [blame] | 1738 | goto out; |
Luis R. Rodriguez | fe33eb3 | 2009-02-21 00:04:30 -0500 | [diff] [blame] | 1739 | |
Luis R. Rodriguez | fe33eb3 | 2009-02-21 00:04:30 -0500 | [diff] [blame] | 1740 | request->wiphy_idx = get_wiphy_idx(wiphy); |
John W. Linville | 4f366c5 | 2010-07-15 14:57:33 -0400 | [diff] [blame] | 1741 | request->alpha2[0] = alpha2[0]; |
| 1742 | request->alpha2[1] = alpha2[1]; |
Luis R. Rodriguez | 7db90f4 | 2009-03-09 22:07:41 -0400 | [diff] [blame] | 1743 | request->initiator = NL80211_REGDOM_SET_BY_COUNTRY_IE; |
Luis R. Rodriguez | fe33eb3 | 2009-02-21 00:04:30 -0500 | [diff] [blame] | 1744 | request->country_ie_env = env; |
Luis R. Rodriguez | 3f2355c | 2008-11-12 14:22:02 -0800 | [diff] [blame] | 1745 | |
Luis R. Rodriguez | abc7381 | 2009-07-30 17:38:08 -0700 | [diff] [blame] | 1746 | mutex_unlock(®_mutex); |
Luis R. Rodriguez | fe33eb3 | 2009-02-21 00:04:30 -0500 | [diff] [blame] | 1747 | |
| 1748 | queue_regulatory_request(request); |
| 1749 | |
| 1750 | return; |
Luis R. Rodriguez | 0441d6f | 2009-02-21 00:04:29 -0500 | [diff] [blame] | 1751 | |
Luis R. Rodriguez | 3f2355c | 2008-11-12 14:22:02 -0800 | [diff] [blame] | 1752 | out: |
Luis R. Rodriguez | abc7381 | 2009-07-30 17:38:08 -0700 | [diff] [blame] | 1753 | mutex_unlock(®_mutex); |
Luis R. Rodriguez | 3f2355c | 2008-11-12 14:22:02 -0800 | [diff] [blame] | 1754 | } |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 1755 | |
Luis R. Rodriguez | 09d989d | 2010-01-29 19:58:57 -0500 | [diff] [blame] | 1756 | static void restore_alpha2(char *alpha2, bool reset_user) |
| 1757 | { |
| 1758 | /* indicates there is no alpha2 to consider for restoration */ |
| 1759 | alpha2[0] = '9'; |
| 1760 | alpha2[1] = '7'; |
| 1761 | |
| 1762 | /* The user setting has precedence over the module parameter */ |
| 1763 | if (is_user_regdom_saved()) { |
| 1764 | /* Unless we're asked to ignore it and reset it */ |
| 1765 | if (reset_user) { |
Luis R. Rodriguez | d91e41b | 2010-10-20 10:18:59 -0700 | [diff] [blame] | 1766 | REG_DBG_PRINT("Restoring regulatory settings " |
Luis R. Rodriguez | 09d989d | 2010-01-29 19:58:57 -0500 | [diff] [blame] | 1767 | "including user preference\n"); |
| 1768 | user_alpha2[0] = '9'; |
| 1769 | user_alpha2[1] = '7'; |
| 1770 | |
| 1771 | /* |
| 1772 | * If we're ignoring user settings, we still need to |
| 1773 | * check the module parameter to ensure we put things |
| 1774 | * back as they were for a full restore. |
| 1775 | */ |
| 1776 | if (!is_world_regdom(ieee80211_regdom)) { |
Luis R. Rodriguez | d91e41b | 2010-10-20 10:18:59 -0700 | [diff] [blame] | 1777 | REG_DBG_PRINT("Keeping preference on " |
Luis R. Rodriguez | 09d989d | 2010-01-29 19:58:57 -0500 | [diff] [blame] | 1778 | "module parameter ieee80211_regdom: %c%c\n", |
| 1779 | ieee80211_regdom[0], |
| 1780 | ieee80211_regdom[1]); |
| 1781 | alpha2[0] = ieee80211_regdom[0]; |
| 1782 | alpha2[1] = ieee80211_regdom[1]; |
| 1783 | } |
| 1784 | } else { |
Luis R. Rodriguez | d91e41b | 2010-10-20 10:18:59 -0700 | [diff] [blame] | 1785 | REG_DBG_PRINT("Restoring regulatory settings " |
Luis R. Rodriguez | 09d989d | 2010-01-29 19:58:57 -0500 | [diff] [blame] | 1786 | "while preserving user preference for: %c%c\n", |
| 1787 | user_alpha2[0], |
| 1788 | user_alpha2[1]); |
| 1789 | alpha2[0] = user_alpha2[0]; |
| 1790 | alpha2[1] = user_alpha2[1]; |
| 1791 | } |
| 1792 | } else if (!is_world_regdom(ieee80211_regdom)) { |
Luis R. Rodriguez | d91e41b | 2010-10-20 10:18:59 -0700 | [diff] [blame] | 1793 | REG_DBG_PRINT("Keeping preference on " |
Luis R. Rodriguez | 09d989d | 2010-01-29 19:58:57 -0500 | [diff] [blame] | 1794 | "module parameter ieee80211_regdom: %c%c\n", |
| 1795 | ieee80211_regdom[0], |
| 1796 | ieee80211_regdom[1]); |
| 1797 | alpha2[0] = ieee80211_regdom[0]; |
| 1798 | alpha2[1] = ieee80211_regdom[1]; |
| 1799 | } else |
Luis R. Rodriguez | d91e41b | 2010-10-20 10:18:59 -0700 | [diff] [blame] | 1800 | REG_DBG_PRINT("Restoring regulatory settings\n"); |
Luis R. Rodriguez | 09d989d | 2010-01-29 19:58:57 -0500 | [diff] [blame] | 1801 | } |
| 1802 | |
Rajkumar Manoharan | 5ce543d | 2011-12-07 21:50:08 +0530 | [diff] [blame] | 1803 | static void restore_custom_reg_settings(struct wiphy *wiphy) |
| 1804 | { |
| 1805 | struct ieee80211_supported_band *sband; |
| 1806 | enum ieee80211_band band; |
| 1807 | struct ieee80211_channel *chan; |
| 1808 | int i; |
| 1809 | |
| 1810 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) { |
| 1811 | sband = wiphy->bands[band]; |
| 1812 | if (!sband) |
| 1813 | continue; |
| 1814 | for (i = 0; i < sband->n_channels; i++) { |
| 1815 | chan = &sband->channels[i]; |
| 1816 | chan->flags = chan->orig_flags; |
| 1817 | chan->max_antenna_gain = chan->orig_mag; |
| 1818 | chan->max_power = chan->orig_mpwr; |
| 1819 | } |
| 1820 | } |
| 1821 | } |
| 1822 | |
Luis R. Rodriguez | 09d989d | 2010-01-29 19:58:57 -0500 | [diff] [blame] | 1823 | /* |
| 1824 | * Restoring regulatory settings involves ingoring any |
| 1825 | * possibly stale country IE information and user regulatory |
| 1826 | * settings if so desired, this includes any beacon hints |
| 1827 | * learned as we could have traveled outside to another country |
| 1828 | * after disconnection. To restore regulatory settings we do |
| 1829 | * exactly what we did at bootup: |
| 1830 | * |
| 1831 | * - send a core regulatory hint |
| 1832 | * - send a user regulatory hint if applicable |
| 1833 | * |
| 1834 | * Device drivers that send a regulatory hint for a specific country |
| 1835 | * keep their own regulatory domain on wiphy->regd so that does does |
| 1836 | * not need to be remembered. |
| 1837 | */ |
| 1838 | static void restore_regulatory_settings(bool reset_user) |
| 1839 | { |
| 1840 | char alpha2[2]; |
Dmitry Shmidt | cee0bec | 2011-12-19 12:32:21 -0800 | [diff] [blame] | 1841 | char world_alpha2[2]; |
Luis R. Rodriguez | 09d989d | 2010-01-29 19:58:57 -0500 | [diff] [blame] | 1842 | struct reg_beacon *reg_beacon, *btmp; |
Luis R. Rodriguez | 1460955 | 2011-04-05 10:49:03 -0700 | [diff] [blame] | 1843 | struct regulatory_request *reg_request, *tmp; |
| 1844 | LIST_HEAD(tmp_reg_req_list); |
Rajkumar Manoharan | 5ce543d | 2011-12-07 21:50:08 +0530 | [diff] [blame] | 1845 | struct cfg80211_registered_device *rdev; |
Luis R. Rodriguez | 09d989d | 2010-01-29 19:58:57 -0500 | [diff] [blame] | 1846 | |
| 1847 | mutex_lock(&cfg80211_mutex); |
| 1848 | mutex_lock(®_mutex); |
| 1849 | |
Luis R. Rodriguez | a042994 | 2011-11-28 16:47:15 -0500 | [diff] [blame] | 1850 | reset_regdomains(true); |
Luis R. Rodriguez | 09d989d | 2010-01-29 19:58:57 -0500 | [diff] [blame] | 1851 | restore_alpha2(alpha2, reset_user); |
| 1852 | |
Luis R. Rodriguez | 1460955 | 2011-04-05 10:49:03 -0700 | [diff] [blame] | 1853 | /* |
| 1854 | * If there's any pending requests we simply |
| 1855 | * stash them to a temporary pending queue and |
| 1856 | * add then after we've restored regulatory |
| 1857 | * settings. |
| 1858 | */ |
| 1859 | spin_lock(®_requests_lock); |
| 1860 | if (!list_empty(®_requests_list)) { |
| 1861 | list_for_each_entry_safe(reg_request, tmp, |
| 1862 | ®_requests_list, list) { |
| 1863 | if (reg_request->initiator != |
| 1864 | NL80211_REGDOM_SET_BY_USER) |
| 1865 | continue; |
| 1866 | list_del(®_request->list); |
| 1867 | list_add_tail(®_request->list, &tmp_reg_req_list); |
| 1868 | } |
| 1869 | } |
| 1870 | spin_unlock(®_requests_lock); |
| 1871 | |
Luis R. Rodriguez | 09d989d | 2010-01-29 19:58:57 -0500 | [diff] [blame] | 1872 | /* Clear beacon hints */ |
| 1873 | spin_lock_bh(®_pending_beacons_lock); |
| 1874 | if (!list_empty(®_pending_beacons)) { |
| 1875 | list_for_each_entry_safe(reg_beacon, btmp, |
| 1876 | ®_pending_beacons, list) { |
| 1877 | list_del(®_beacon->list); |
| 1878 | kfree(reg_beacon); |
| 1879 | } |
| 1880 | } |
| 1881 | spin_unlock_bh(®_pending_beacons_lock); |
| 1882 | |
| 1883 | if (!list_empty(®_beacon_list)) { |
| 1884 | list_for_each_entry_safe(reg_beacon, btmp, |
| 1885 | ®_beacon_list, list) { |
| 1886 | list_del(®_beacon->list); |
| 1887 | kfree(reg_beacon); |
| 1888 | } |
| 1889 | } |
| 1890 | |
| 1891 | /* First restore to the basic regulatory settings */ |
| 1892 | cfg80211_regdomain = cfg80211_world_regdom; |
Dmitry Shmidt | cee0bec | 2011-12-19 12:32:21 -0800 | [diff] [blame] | 1893 | world_alpha2[0] = cfg80211_regdomain->alpha2[0]; |
| 1894 | world_alpha2[1] = cfg80211_regdomain->alpha2[1]; |
Luis R. Rodriguez | 09d989d | 2010-01-29 19:58:57 -0500 | [diff] [blame] | 1895 | |
Rajkumar Manoharan | 5ce543d | 2011-12-07 21:50:08 +0530 | [diff] [blame] | 1896 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) { |
| 1897 | if (rdev->wiphy.flags & WIPHY_FLAG_CUSTOM_REGULATORY) |
| 1898 | restore_custom_reg_settings(&rdev->wiphy); |
| 1899 | } |
| 1900 | |
Luis R. Rodriguez | 09d989d | 2010-01-29 19:58:57 -0500 | [diff] [blame] | 1901 | mutex_unlock(®_mutex); |
| 1902 | mutex_unlock(&cfg80211_mutex); |
| 1903 | |
Dmitry Shmidt | cee0bec | 2011-12-19 12:32:21 -0800 | [diff] [blame] | 1904 | regulatory_hint_core(world_alpha2); |
Luis R. Rodriguez | 09d989d | 2010-01-29 19:58:57 -0500 | [diff] [blame] | 1905 | |
| 1906 | /* |
| 1907 | * This restores the ieee80211_regdom module parameter |
| 1908 | * preference or the last user requested regulatory |
| 1909 | * settings, user regulatory settings takes precedence. |
| 1910 | */ |
| 1911 | if (is_an_alpha2(alpha2)) |
| 1912 | regulatory_hint_user(user_alpha2); |
Luis R. Rodriguez | 09d989d | 2010-01-29 19:58:57 -0500 | [diff] [blame] | 1913 | |
Luis R. Rodriguez | 1460955 | 2011-04-05 10:49:03 -0700 | [diff] [blame] | 1914 | if (list_empty(&tmp_reg_req_list)) |
| 1915 | return; |
| 1916 | |
| 1917 | mutex_lock(&cfg80211_mutex); |
| 1918 | mutex_lock(®_mutex); |
| 1919 | |
| 1920 | spin_lock(®_requests_lock); |
| 1921 | list_for_each_entry_safe(reg_request, tmp, &tmp_reg_req_list, list) { |
| 1922 | REG_DBG_PRINT("Adding request for country %c%c back " |
| 1923 | "into the queue\n", |
| 1924 | reg_request->alpha2[0], |
| 1925 | reg_request->alpha2[1]); |
| 1926 | list_del(®_request->list); |
| 1927 | list_add_tail(®_request->list, ®_requests_list); |
| 1928 | } |
| 1929 | spin_unlock(®_requests_lock); |
| 1930 | |
| 1931 | mutex_unlock(®_mutex); |
| 1932 | mutex_unlock(&cfg80211_mutex); |
| 1933 | |
| 1934 | REG_DBG_PRINT("Kicking the queue\n"); |
| 1935 | |
| 1936 | schedule_work(®_work); |
| 1937 | } |
Luis R. Rodriguez | 09d989d | 2010-01-29 19:58:57 -0500 | [diff] [blame] | 1938 | |
| 1939 | void regulatory_hint_disconnect(void) |
| 1940 | { |
Luis R. Rodriguez | d91e41b | 2010-10-20 10:18:59 -0700 | [diff] [blame] | 1941 | REG_DBG_PRINT("All devices are disconnected, going to " |
Luis R. Rodriguez | 09d989d | 2010-01-29 19:58:57 -0500 | [diff] [blame] | 1942 | "restore regulatory settings\n"); |
| 1943 | restore_regulatory_settings(false); |
| 1944 | } |
| 1945 | |
Luis R. Rodriguez | e38f8a7 | 2009-02-21 00:20:39 -0500 | [diff] [blame] | 1946 | static bool freq_is_chan_12_13_14(u16 freq) |
| 1947 | { |
Bruno Randolf | 59eb21a | 2011-01-17 13:37:28 +0900 | [diff] [blame] | 1948 | if (freq == ieee80211_channel_to_frequency(12, IEEE80211_BAND_2GHZ) || |
| 1949 | freq == ieee80211_channel_to_frequency(13, IEEE80211_BAND_2GHZ) || |
| 1950 | freq == ieee80211_channel_to_frequency(14, IEEE80211_BAND_2GHZ)) |
Luis R. Rodriguez | e38f8a7 | 2009-02-21 00:20:39 -0500 | [diff] [blame] | 1951 | return true; |
| 1952 | return false; |
| 1953 | } |
| 1954 | |
| 1955 | int regulatory_hint_found_beacon(struct wiphy *wiphy, |
| 1956 | struct ieee80211_channel *beacon_chan, |
| 1957 | gfp_t gfp) |
| 1958 | { |
| 1959 | struct reg_beacon *reg_beacon; |
| 1960 | |
| 1961 | if (likely((beacon_chan->beacon_found || |
| 1962 | (beacon_chan->flags & IEEE80211_CHAN_RADAR) || |
| 1963 | (beacon_chan->band == IEEE80211_BAND_2GHZ && |
| 1964 | !freq_is_chan_12_13_14(beacon_chan->center_freq))))) |
| 1965 | return 0; |
| 1966 | |
| 1967 | reg_beacon = kzalloc(sizeof(struct reg_beacon), gfp); |
| 1968 | if (!reg_beacon) |
| 1969 | return -ENOMEM; |
| 1970 | |
Luis R. Rodriguez | d91e41b | 2010-10-20 10:18:59 -0700 | [diff] [blame] | 1971 | REG_DBG_PRINT("Found new beacon on " |
Luis R. Rodriguez | 4113f75 | 2010-01-04 11:50:11 -0500 | [diff] [blame] | 1972 | "frequency: %d MHz (Ch %d) on %s\n", |
| 1973 | beacon_chan->center_freq, |
| 1974 | ieee80211_frequency_to_channel(beacon_chan->center_freq), |
| 1975 | wiphy_name(wiphy)); |
| 1976 | |
Luis R. Rodriguez | e38f8a7 | 2009-02-21 00:20:39 -0500 | [diff] [blame] | 1977 | memcpy(®_beacon->chan, beacon_chan, |
| 1978 | sizeof(struct ieee80211_channel)); |
| 1979 | |
| 1980 | |
| 1981 | /* |
| 1982 | * Since we can be called from BH or and non-BH context |
| 1983 | * we must use spin_lock_bh() |
| 1984 | */ |
| 1985 | spin_lock_bh(®_pending_beacons_lock); |
| 1986 | list_add_tail(®_beacon->list, ®_pending_beacons); |
| 1987 | spin_unlock_bh(®_pending_beacons_lock); |
| 1988 | |
| 1989 | schedule_work(®_work); |
| 1990 | |
| 1991 | return 0; |
| 1992 | } |
| 1993 | |
Johannes Berg | a3d2eaf | 2008-09-15 11:10:52 +0200 | [diff] [blame] | 1994 | static void print_rd_rules(const struct ieee80211_regdomain *rd) |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 1995 | { |
| 1996 | unsigned int i; |
Johannes Berg | a3d2eaf | 2008-09-15 11:10:52 +0200 | [diff] [blame] | 1997 | const struct ieee80211_reg_rule *reg_rule = NULL; |
| 1998 | const struct ieee80211_freq_range *freq_range = NULL; |
| 1999 | const struct ieee80211_power_rule *power_rule = NULL; |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 2000 | |
Luis R. Rodriguez | 6653325 | 2011-12-20 12:23:37 -0800 | [diff] [blame] | 2001 | 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] | 2002 | |
| 2003 | for (i = 0; i < rd->n_reg_rules; i++) { |
| 2004 | reg_rule = &rd->reg_rules[i]; |
| 2005 | freq_range = ®_rule->freq_range; |
| 2006 | power_rule = ®_rule->power_rule; |
| 2007 | |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 2008 | /* |
| 2009 | * There may not be documentation for max antenna gain |
| 2010 | * in certain regions |
| 2011 | */ |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 2012 | if (power_rule->max_antenna_gain) |
Luis R. Rodriguez | 6653325 | 2011-12-20 12:23:37 -0800 | [diff] [blame] | 2013 | 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] | 2014 | freq_range->start_freq_khz, |
| 2015 | freq_range->end_freq_khz, |
| 2016 | freq_range->max_bandwidth_khz, |
| 2017 | power_rule->max_antenna_gain, |
| 2018 | power_rule->max_eirp); |
| 2019 | else |
Luis R. Rodriguez | 6653325 | 2011-12-20 12:23:37 -0800 | [diff] [blame] | 2020 | 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] | 2021 | freq_range->start_freq_khz, |
| 2022 | freq_range->end_freq_khz, |
| 2023 | freq_range->max_bandwidth_khz, |
| 2024 | power_rule->max_eirp); |
| 2025 | } |
| 2026 | } |
| 2027 | |
Luis R. Rodriguez | 8b60b07 | 2011-10-11 10:59:02 -0700 | [diff] [blame] | 2028 | bool reg_supported_dfs_region(u8 dfs_region) |
| 2029 | { |
| 2030 | switch (dfs_region) { |
| 2031 | case NL80211_DFS_UNSET: |
| 2032 | case NL80211_DFS_FCC: |
| 2033 | case NL80211_DFS_ETSI: |
| 2034 | case NL80211_DFS_JP: |
| 2035 | return true; |
| 2036 | default: |
| 2037 | REG_DBG_PRINT("Ignoring uknown DFS master region: %d\n", |
| 2038 | dfs_region); |
| 2039 | return false; |
| 2040 | } |
| 2041 | } |
| 2042 | |
| 2043 | static void print_dfs_region(u8 dfs_region) |
| 2044 | { |
| 2045 | if (!dfs_region) |
| 2046 | return; |
| 2047 | |
| 2048 | switch (dfs_region) { |
| 2049 | case NL80211_DFS_FCC: |
| 2050 | pr_info(" DFS Master region FCC"); |
| 2051 | break; |
| 2052 | case NL80211_DFS_ETSI: |
| 2053 | pr_info(" DFS Master region ETSI"); |
| 2054 | break; |
| 2055 | case NL80211_DFS_JP: |
| 2056 | pr_info(" DFS Master region JP"); |
| 2057 | break; |
| 2058 | default: |
| 2059 | pr_info(" DFS Master region Uknown"); |
| 2060 | break; |
| 2061 | } |
| 2062 | } |
| 2063 | |
Johannes Berg | a3d2eaf | 2008-09-15 11:10:52 +0200 | [diff] [blame] | 2064 | static void print_regdomain(const struct ieee80211_regdomain *rd) |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 2065 | { |
| 2066 | |
Luis R. Rodriguez | 3f2355c | 2008-11-12 14:22:02 -0800 | [diff] [blame] | 2067 | if (is_intersected_alpha2(rd->alpha2)) { |
Luis R. Rodriguez | 3f2355c | 2008-11-12 14:22:02 -0800 | [diff] [blame] | 2068 | |
Luis R. Rodriguez | 7db90f4 | 2009-03-09 22:07:41 -0400 | [diff] [blame] | 2069 | if (last_request->initiator == |
| 2070 | NL80211_REGDOM_SET_BY_COUNTRY_IE) { |
Johannes Berg | 79c97e9 | 2009-07-07 03:56:12 +0200 | [diff] [blame] | 2071 | struct cfg80211_registered_device *rdev; |
| 2072 | rdev = cfg80211_rdev_by_wiphy_idx( |
Luis R. Rodriguez | 806a9e3 | 2009-02-21 00:04:26 -0500 | [diff] [blame] | 2073 | last_request->wiphy_idx); |
Johannes Berg | 79c97e9 | 2009-07-07 03:56:12 +0200 | [diff] [blame] | 2074 | if (rdev) { |
Joe Perches | e9c0268 | 2010-11-16 19:56:49 -0800 | [diff] [blame] | 2075 | pr_info("Current regulatory domain updated by AP to: %c%c\n", |
Johannes Berg | 79c97e9 | 2009-07-07 03:56:12 +0200 | [diff] [blame] | 2076 | rdev->country_ie_alpha2[0], |
| 2077 | rdev->country_ie_alpha2[1]); |
Luis R. Rodriguez | 3f2355c | 2008-11-12 14:22:02 -0800 | [diff] [blame] | 2078 | } else |
Joe Perches | e9c0268 | 2010-11-16 19:56:49 -0800 | [diff] [blame] | 2079 | pr_info("Current regulatory domain intersected:\n"); |
Luis R. Rodriguez | 3f2355c | 2008-11-12 14:22:02 -0800 | [diff] [blame] | 2080 | } else |
Joe Perches | e9c0268 | 2010-11-16 19:56:49 -0800 | [diff] [blame] | 2081 | pr_info("Current regulatory domain intersected:\n"); |
Luis R. Rodriguez | 3f2355c | 2008-11-12 14:22:02 -0800 | [diff] [blame] | 2082 | } else if (is_world_regdom(rd->alpha2)) |
Joe Perches | e9c0268 | 2010-11-16 19:56:49 -0800 | [diff] [blame] | 2083 | pr_info("World regulatory domain updated:\n"); |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 2084 | else { |
| 2085 | if (is_unknown_alpha2(rd->alpha2)) |
Joe Perches | e9c0268 | 2010-11-16 19:56:49 -0800 | [diff] [blame] | 2086 | 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] | 2087 | else |
Joe Perches | e9c0268 | 2010-11-16 19:56:49 -0800 | [diff] [blame] | 2088 | pr_info("Regulatory domain changed to country: %c%c\n", |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 2089 | rd->alpha2[0], rd->alpha2[1]); |
| 2090 | } |
Luis R. Rodriguez | 8b60b07 | 2011-10-11 10:59:02 -0700 | [diff] [blame] | 2091 | print_dfs_region(rd->dfs_region); |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 2092 | print_rd_rules(rd); |
| 2093 | } |
| 2094 | |
Johannes Berg | 2df7816 | 2008-10-28 16:49:41 +0100 | [diff] [blame] | 2095 | static void print_regdomain_info(const struct ieee80211_regdomain *rd) |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 2096 | { |
Joe Perches | e9c0268 | 2010-11-16 19:56:49 -0800 | [diff] [blame] | 2097 | 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] | 2098 | print_rd_rules(rd); |
| 2099 | } |
| 2100 | |
Johannes Berg | d2372b3 | 2008-10-24 20:32:20 +0200 | [diff] [blame] | 2101 | /* Takes ownership of rd only if it doesn't fail */ |
Johannes Berg | a3d2eaf | 2008-09-15 11:10:52 +0200 | [diff] [blame] | 2102 | static int __set_regdom(const struct ieee80211_regdomain *rd) |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 2103 | { |
Luis R. Rodriguez | 9c96477 | 2008-10-30 13:33:53 -0700 | [diff] [blame] | 2104 | const struct ieee80211_regdomain *intersected_rd = NULL; |
Johannes Berg | 79c97e9 | 2009-07-07 03:56:12 +0200 | [diff] [blame] | 2105 | struct cfg80211_registered_device *rdev = NULL; |
Luis R. Rodriguez | 806a9e3 | 2009-02-21 00:04:26 -0500 | [diff] [blame] | 2106 | struct wiphy *request_wiphy; |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 2107 | /* Some basic sanity checks first */ |
| 2108 | |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 2109 | if (is_world_regdom(rd->alpha2)) { |
Johannes Berg | f6037d0 | 2008-10-21 11:01:33 +0200 | [diff] [blame] | 2110 | if (WARN_ON(!reg_is_valid_request(rd->alpha2))) |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 2111 | return -EINVAL; |
| 2112 | update_world_regdomain(rd); |
| 2113 | return 0; |
| 2114 | } |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 2115 | |
| 2116 | if (!is_alpha2_set(rd->alpha2) && !is_an_alpha2(rd->alpha2) && |
| 2117 | !is_unknown_alpha2(rd->alpha2)) |
| 2118 | return -EINVAL; |
| 2119 | |
Johannes Berg | f6037d0 | 2008-10-21 11:01:33 +0200 | [diff] [blame] | 2120 | if (!last_request) |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 2121 | return -EINVAL; |
| 2122 | |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 2123 | /* |
| 2124 | * Lets only bother proceeding on the same alpha2 if the current |
Luis R. Rodriguez | 3f2355c | 2008-11-12 14:22:02 -0800 | [diff] [blame] | 2125 | * 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] | 2126 | * and the pending request came in from a country IE |
| 2127 | */ |
Luis R. Rodriguez | 7db90f4 | 2009-03-09 22:07:41 -0400 | [diff] [blame] | 2128 | if (last_request->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE) { |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 2129 | /* |
| 2130 | * If someone else asked us to change the rd lets only bother |
| 2131 | * checking if the alpha2 changes if CRDA was already called |
| 2132 | */ |
John W. Linville | baeb66f | 2009-12-18 17:59:02 -0500 | [diff] [blame] | 2133 | if (!regdom_changes(rd->alpha2)) |
Luis R. Rodriguez | 3f2355c | 2008-11-12 14:22:02 -0800 | [diff] [blame] | 2134 | return -EINVAL; |
| 2135 | } |
| 2136 | |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 2137 | /* |
| 2138 | * Now lets set the regulatory domain, update all driver channels |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 2139 | * and finally inform them of what we have done, in case they want |
| 2140 | * to review or adjust their own settings based on their own |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 2141 | * internal EEPROM data |
| 2142 | */ |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 2143 | |
Johannes Berg | f6037d0 | 2008-10-21 11:01:33 +0200 | [diff] [blame] | 2144 | if (WARN_ON(!reg_is_valid_request(rd->alpha2))) |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 2145 | return -EINVAL; |
| 2146 | |
Luis R. Rodriguez | 8375af3 | 2008-11-12 14:21:57 -0800 | [diff] [blame] | 2147 | if (!is_valid_rd(rd)) { |
Joe Perches | e9c0268 | 2010-11-16 19:56:49 -0800 | [diff] [blame] | 2148 | pr_err("Invalid regulatory domain detected:\n"); |
Luis R. Rodriguez | 8375af3 | 2008-11-12 14:21:57 -0800 | [diff] [blame] | 2149 | print_regdomain_info(rd); |
| 2150 | return -EINVAL; |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 2151 | } |
| 2152 | |
Luis R. Rodriguez | 806a9e3 | 2009-02-21 00:04:26 -0500 | [diff] [blame] | 2153 | request_wiphy = wiphy_idx_to_wiphy(last_request->wiphy_idx); |
Luis R. Rodriguez | 0bac71a | 2011-11-28 16:47:16 -0500 | [diff] [blame] | 2154 | if (!request_wiphy && |
| 2155 | (last_request->initiator == NL80211_REGDOM_SET_BY_DRIVER || |
| 2156 | last_request->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE)) { |
| 2157 | schedule_delayed_work(®_timeout, 0); |
Johannes Berg | de3584b | 2011-11-21 10:44:00 +0100 | [diff] [blame] | 2158 | return -ENODEV; |
| 2159 | } |
Luis R. Rodriguez | 806a9e3 | 2009-02-21 00:04:26 -0500 | [diff] [blame] | 2160 | |
Luis R. Rodriguez | b8295ac | 2008-11-12 14:21:58 -0800 | [diff] [blame] | 2161 | if (!last_request->intersect) { |
Luis R. Rodriguez | 3e0c3ff | 2009-01-07 17:43:34 -0800 | [diff] [blame] | 2162 | int r; |
| 2163 | |
Luis R. Rodriguez | 7db90f4 | 2009-03-09 22:07:41 -0400 | [diff] [blame] | 2164 | if (last_request->initiator != NL80211_REGDOM_SET_BY_DRIVER) { |
Luis R. Rodriguez | a042994 | 2011-11-28 16:47:15 -0500 | [diff] [blame] | 2165 | reset_regdomains(false); |
Luis R. Rodriguez | 3e0c3ff | 2009-01-07 17:43:34 -0800 | [diff] [blame] | 2166 | cfg80211_regdomain = rd; |
| 2167 | return 0; |
| 2168 | } |
| 2169 | |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 2170 | /* |
| 2171 | * For a driver hint, lets copy the regulatory domain the |
| 2172 | * driver wanted to the wiphy to deal with conflicts |
| 2173 | */ |
Luis R. Rodriguez | 3e0c3ff | 2009-01-07 17:43:34 -0800 | [diff] [blame] | 2174 | |
Luis R. Rodriguez | 558f6d3 | 2009-06-08 18:54:37 -0700 | [diff] [blame] | 2175 | /* |
| 2176 | * Userspace could have sent two replies with only |
| 2177 | * one kernel request. |
| 2178 | */ |
| 2179 | if (request_wiphy->regd) |
| 2180 | return -EALREADY; |
Luis R. Rodriguez | 3e0c3ff | 2009-01-07 17:43:34 -0800 | [diff] [blame] | 2181 | |
Luis R. Rodriguez | 806a9e3 | 2009-02-21 00:04:26 -0500 | [diff] [blame] | 2182 | r = reg_copy_regd(&request_wiphy->regd, rd); |
Luis R. Rodriguez | 3e0c3ff | 2009-01-07 17:43:34 -0800 | [diff] [blame] | 2183 | if (r) |
| 2184 | return r; |
| 2185 | |
Luis R. Rodriguez | a042994 | 2011-11-28 16:47:15 -0500 | [diff] [blame] | 2186 | reset_regdomains(false); |
Luis R. Rodriguez | b8295ac | 2008-11-12 14:21:58 -0800 | [diff] [blame] | 2187 | cfg80211_regdomain = rd; |
| 2188 | return 0; |
| 2189 | } |
| 2190 | |
| 2191 | /* Intersection requires a bit more work */ |
| 2192 | |
Luis R. Rodriguez | 7db90f4 | 2009-03-09 22:07:41 -0400 | [diff] [blame] | 2193 | if (last_request->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE) { |
Luis R. Rodriguez | b8295ac | 2008-11-12 14:21:58 -0800 | [diff] [blame] | 2194 | |
Luis R. Rodriguez | 9c96477 | 2008-10-30 13:33:53 -0700 | [diff] [blame] | 2195 | intersected_rd = regdom_intersect(rd, cfg80211_regdomain); |
| 2196 | if (!intersected_rd) |
| 2197 | return -EINVAL; |
Luis R. Rodriguez | b8295ac | 2008-11-12 14:21:58 -0800 | [diff] [blame] | 2198 | |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 2199 | /* |
| 2200 | * We can trash what CRDA provided now. |
Luis R. Rodriguez | 3e0c3ff | 2009-01-07 17:43:34 -0800 | [diff] [blame] | 2201 | * However if a driver requested this specific regulatory |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 2202 | * domain we keep it for its private use |
| 2203 | */ |
Larry Finger | 271a5d7 | 2013-02-04 15:33:44 -0600 | [diff] [blame] | 2204 | if (last_request->initiator == NL80211_REGDOM_SET_BY_DRIVER) { |
| 2205 | const struct ieee80211_regdomain *tmp; |
| 2206 | |
| 2207 | tmp = request_wiphy->regd; |
Luis R. Rodriguez | 806a9e3 | 2009-02-21 00:04:26 -0500 | [diff] [blame] | 2208 | request_wiphy->regd = rd; |
Larry Finger | 271a5d7 | 2013-02-04 15:33:44 -0600 | [diff] [blame] | 2209 | kfree(tmp); |
| 2210 | } else { |
Luis R. Rodriguez | 3e0c3ff | 2009-01-07 17:43:34 -0800 | [diff] [blame] | 2211 | kfree(rd); |
Larry Finger | 271a5d7 | 2013-02-04 15:33:44 -0600 | [diff] [blame] | 2212 | } |
Luis R. Rodriguez | 3e0c3ff | 2009-01-07 17:43:34 -0800 | [diff] [blame] | 2213 | |
Luis R. Rodriguez | b8295ac | 2008-11-12 14:21:58 -0800 | [diff] [blame] | 2214 | rd = NULL; |
| 2215 | |
Luis R. Rodriguez | a042994 | 2011-11-28 16:47:15 -0500 | [diff] [blame] | 2216 | reset_regdomains(false); |
Luis R. Rodriguez | b8295ac | 2008-11-12 14:21:58 -0800 | [diff] [blame] | 2217 | cfg80211_regdomain = intersected_rd; |
| 2218 | |
| 2219 | return 0; |
Luis R. Rodriguez | 9c96477 | 2008-10-30 13:33:53 -0700 | [diff] [blame] | 2220 | } |
| 2221 | |
Luis R. Rodriguez | 3f2355c | 2008-11-12 14:22:02 -0800 | [diff] [blame] | 2222 | if (!intersected_rd) |
| 2223 | return -EINVAL; |
| 2224 | |
Johannes Berg | 79c97e9 | 2009-07-07 03:56:12 +0200 | [diff] [blame] | 2225 | rdev = wiphy_to_dev(request_wiphy); |
Luis R. Rodriguez | 3f2355c | 2008-11-12 14:22:02 -0800 | [diff] [blame] | 2226 | |
Johannes Berg | 79c97e9 | 2009-07-07 03:56:12 +0200 | [diff] [blame] | 2227 | rdev->country_ie_alpha2[0] = rd->alpha2[0]; |
| 2228 | rdev->country_ie_alpha2[1] = rd->alpha2[1]; |
| 2229 | rdev->env = last_request->country_ie_env; |
Luis R. Rodriguez | 3f2355c | 2008-11-12 14:22:02 -0800 | [diff] [blame] | 2230 | |
| 2231 | BUG_ON(intersected_rd == rd); |
| 2232 | |
| 2233 | kfree(rd); |
| 2234 | rd = NULL; |
| 2235 | |
Luis R. Rodriguez | a042994 | 2011-11-28 16:47:15 -0500 | [diff] [blame] | 2236 | reset_regdomains(false); |
Luis R. Rodriguez | 3f2355c | 2008-11-12 14:22:02 -0800 | [diff] [blame] | 2237 | cfg80211_regdomain = intersected_rd; |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 2238 | |
| 2239 | return 0; |
| 2240 | } |
| 2241 | |
| 2242 | |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 2243 | /* |
| 2244 | * Use this call to set the current regulatory domain. Conflicts with |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 2245 | * multiple drivers can be ironed out later. Caller must've already |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 2246 | * kmalloc'd the rd structure. Caller must hold cfg80211_mutex |
| 2247 | */ |
Johannes Berg | a3d2eaf | 2008-09-15 11:10:52 +0200 | [diff] [blame] | 2248 | int set_regdom(const struct ieee80211_regdomain *rd) |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 2249 | { |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 2250 | int r; |
| 2251 | |
Luis R. Rodriguez | 761cf7e | 2009-02-21 00:04:25 -0500 | [diff] [blame] | 2252 | assert_cfg80211_lock(); |
| 2253 | |
Luis R. Rodriguez | abc7381 | 2009-07-30 17:38:08 -0700 | [diff] [blame] | 2254 | mutex_lock(®_mutex); |
| 2255 | |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 2256 | /* Note that this doesn't update the wiphys, this is done below */ |
| 2257 | r = __set_regdom(rd); |
Johannes Berg | d2372b3 | 2008-10-24 20:32:20 +0200 | [diff] [blame] | 2258 | if (r) { |
| 2259 | kfree(rd); |
Luis R. Rodriguez | abc7381 | 2009-07-30 17:38:08 -0700 | [diff] [blame] | 2260 | mutex_unlock(®_mutex); |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 2261 | return r; |
Johannes Berg | d2372b3 | 2008-10-24 20:32:20 +0200 | [diff] [blame] | 2262 | } |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 2263 | |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 2264 | /* This would make this whole thing pointless */ |
Luis R. Rodriguez | a01ddaf | 2008-11-12 14:21:59 -0800 | [diff] [blame] | 2265 | if (!last_request->intersect) |
| 2266 | BUG_ON(rd != cfg80211_regdomain); |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 2267 | |
| 2268 | /* update all wiphys now with the new established regulatory domain */ |
Johannes Berg | f6037d0 | 2008-10-21 11:01:33 +0200 | [diff] [blame] | 2269 | update_all_wiphy_regulatory(last_request->initiator); |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 2270 | |
Luis R. Rodriguez | a01ddaf | 2008-11-12 14:21:59 -0800 | [diff] [blame] | 2271 | print_regdomain(cfg80211_regdomain); |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 2272 | |
Luis R. Rodriguez | 73d54c9 | 2009-03-09 22:07:42 -0400 | [diff] [blame] | 2273 | nl80211_send_reg_change_event(last_request); |
| 2274 | |
Luis R. Rodriguez | b2e253c | 2010-11-17 21:46:09 -0800 | [diff] [blame] | 2275 | reg_set_request_processed(); |
| 2276 | |
Luis R. Rodriguez | abc7381 | 2009-07-30 17:38:08 -0700 | [diff] [blame] | 2277 | mutex_unlock(®_mutex); |
| 2278 | |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 2279 | return r; |
| 2280 | } |
| 2281 | |
Scott James Remnant | 4d9d88d | 2011-03-08 10:45:30 -0800 | [diff] [blame] | 2282 | #ifdef CONFIG_HOTPLUG |
| 2283 | int reg_device_uevent(struct device *dev, struct kobj_uevent_env *env) |
| 2284 | { |
| 2285 | if (last_request && !last_request->processed) { |
| 2286 | if (add_uevent_var(env, "COUNTRY=%c%c", |
| 2287 | last_request->alpha2[0], |
| 2288 | last_request->alpha2[1])) |
| 2289 | return -ENOMEM; |
| 2290 | } |
| 2291 | |
| 2292 | return 0; |
| 2293 | } |
| 2294 | #else |
| 2295 | int reg_device_uevent(struct device *dev, struct kobj_uevent_env *env) |
| 2296 | { |
| 2297 | return -ENODEV; |
| 2298 | } |
| 2299 | #endif /* CONFIG_HOTPLUG */ |
| 2300 | |
Luis R. Rodriguez | a179439 | 2009-02-21 00:04:21 -0500 | [diff] [blame] | 2301 | /* Caller must hold cfg80211_mutex */ |
Luis R. Rodriguez | 3f2355c | 2008-11-12 14:22:02 -0800 | [diff] [blame] | 2302 | void reg_device_remove(struct wiphy *wiphy) |
| 2303 | { |
Luis R. Rodriguez | 0ad8aca | 2009-03-24 21:21:08 -0400 | [diff] [blame] | 2304 | struct wiphy *request_wiphy = NULL; |
Luis R. Rodriguez | 806a9e3 | 2009-02-21 00:04:26 -0500 | [diff] [blame] | 2305 | |
Luis R. Rodriguez | 761cf7e | 2009-02-21 00:04:25 -0500 | [diff] [blame] | 2306 | assert_cfg80211_lock(); |
| 2307 | |
Luis R. Rodriguez | abc7381 | 2009-07-30 17:38:08 -0700 | [diff] [blame] | 2308 | mutex_lock(®_mutex); |
| 2309 | |
Chris Wright | 0ef9ccd | 2009-04-24 14:09:31 -0700 | [diff] [blame] | 2310 | kfree(wiphy->regd); |
| 2311 | |
Luis R. Rodriguez | 0ad8aca | 2009-03-24 21:21:08 -0400 | [diff] [blame] | 2312 | if (last_request) |
| 2313 | request_wiphy = wiphy_idx_to_wiphy(last_request->wiphy_idx); |
Luis R. Rodriguez | 806a9e3 | 2009-02-21 00:04:26 -0500 | [diff] [blame] | 2314 | |
Chris Wright | 0ef9ccd | 2009-04-24 14:09:31 -0700 | [diff] [blame] | 2315 | if (!request_wiphy || request_wiphy != wiphy) |
Luis R. Rodriguez | abc7381 | 2009-07-30 17:38:08 -0700 | [diff] [blame] | 2316 | goto out; |
Chris Wright | 0ef9ccd | 2009-04-24 14:09:31 -0700 | [diff] [blame] | 2317 | |
Luis R. Rodriguez | 806a9e3 | 2009-02-21 00:04:26 -0500 | [diff] [blame] | 2318 | last_request->wiphy_idx = WIPHY_IDX_STALE; |
Luis R. Rodriguez | 3f2355c | 2008-11-12 14:22:02 -0800 | [diff] [blame] | 2319 | last_request->country_ie_env = ENVIRON_ANY; |
Luis R. Rodriguez | abc7381 | 2009-07-30 17:38:08 -0700 | [diff] [blame] | 2320 | out: |
| 2321 | mutex_unlock(®_mutex); |
Luis R. Rodriguez | 3f2355c | 2008-11-12 14:22:02 -0800 | [diff] [blame] | 2322 | } |
| 2323 | |
Luis R. Rodriguez | a90c7a3 | 2011-04-05 10:49:04 -0700 | [diff] [blame] | 2324 | static void reg_timeout_work(struct work_struct *work) |
| 2325 | { |
| 2326 | REG_DBG_PRINT("Timeout while waiting for CRDA to reply, " |
Joe Perches | 12c5ffb | 2011-07-29 14:51:25 -0700 | [diff] [blame] | 2327 | "restoring regulatory settings\n"); |
Luis R. Rodriguez | a90c7a3 | 2011-04-05 10:49:04 -0700 | [diff] [blame] | 2328 | restore_regulatory_settings(true); |
| 2329 | } |
| 2330 | |
Uwe Kleine-König | 2fcc9f7 | 2010-06-18 09:38:55 +0200 | [diff] [blame] | 2331 | int __init regulatory_init(void) |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 2332 | { |
Luis R. Rodriguez | bcf4f99 | 2009-02-21 00:04:24 -0500 | [diff] [blame] | 2333 | int err = 0; |
Johannes Berg | 734366d | 2008-09-15 10:56:48 +0200 | [diff] [blame] | 2334 | |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 2335 | reg_pdev = platform_device_register_simple("regulatory", 0, NULL, 0); |
| 2336 | if (IS_ERR(reg_pdev)) |
| 2337 | return PTR_ERR(reg_pdev); |
Johannes Berg | 734366d | 2008-09-15 10:56:48 +0200 | [diff] [blame] | 2338 | |
Scott James Remnant | 4d9d88d | 2011-03-08 10:45:30 -0800 | [diff] [blame] | 2339 | reg_pdev->dev.type = ®_device_type; |
| 2340 | |
Luis R. Rodriguez | fe33eb3 | 2009-02-21 00:04:30 -0500 | [diff] [blame] | 2341 | spin_lock_init(®_requests_lock); |
Luis R. Rodriguez | e38f8a7 | 2009-02-21 00:20:39 -0500 | [diff] [blame] | 2342 | spin_lock_init(®_pending_beacons_lock); |
Luis R. Rodriguez | fe33eb3 | 2009-02-21 00:04:30 -0500 | [diff] [blame] | 2343 | |
Johannes Berg | a3d2eaf | 2008-09-15 11:10:52 +0200 | [diff] [blame] | 2344 | cfg80211_regdomain = cfg80211_world_regdom; |
Johannes Berg | 734366d | 2008-09-15 10:56:48 +0200 | [diff] [blame] | 2345 | |
Luis R. Rodriguez | 09d989d | 2010-01-29 19:58:57 -0500 | [diff] [blame] | 2346 | user_alpha2[0] = '9'; |
| 2347 | user_alpha2[1] = '7'; |
| 2348 | |
Luis R. Rodriguez | ae9e4b0 | 2009-07-14 20:23:15 -0400 | [diff] [blame] | 2349 | /* We always try to get an update for the static regdomain */ |
| 2350 | err = regulatory_hint_core(cfg80211_regdomain->alpha2); |
Luis R. Rodriguez | bcf4f99 | 2009-02-21 00:04:24 -0500 | [diff] [blame] | 2351 | if (err) { |
| 2352 | if (err == -ENOMEM) |
| 2353 | return err; |
| 2354 | /* |
| 2355 | * N.B. kobject_uevent_env() can fail mainly for when we're out |
| 2356 | * memory which is handled and propagated appropriately above |
| 2357 | * but it can also fail during a netlink_broadcast() or during |
| 2358 | * early boot for call_usermodehelper(). For now treat these |
| 2359 | * errors as non-fatal. |
| 2360 | */ |
Joe Perches | e9c0268 | 2010-11-16 19:56:49 -0800 | [diff] [blame] | 2361 | 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] | 2362 | #ifdef CONFIG_CFG80211_REG_DEBUG |
| 2363 | /* We want to find out exactly why when debugging */ |
| 2364 | WARN_ON(err); |
| 2365 | #endif |
| 2366 | } |
Johannes Berg | 734366d | 2008-09-15 10:56:48 +0200 | [diff] [blame] | 2367 | |
Luis R. Rodriguez | ae9e4b0 | 2009-07-14 20:23:15 -0400 | [diff] [blame] | 2368 | /* |
| 2369 | * Finally, if the user set the module parameter treat it |
| 2370 | * as a user hint. |
| 2371 | */ |
| 2372 | if (!is_world_regdom(ieee80211_regdom)) |
| 2373 | regulatory_hint_user(ieee80211_regdom); |
| 2374 | |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 2375 | return 0; |
| 2376 | } |
| 2377 | |
Uwe Kleine-König | 2fcc9f7 | 2010-06-18 09:38:55 +0200 | [diff] [blame] | 2378 | void /* __init_or_exit */ regulatory_exit(void) |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 2379 | { |
Luis R. Rodriguez | fe33eb3 | 2009-02-21 00:04:30 -0500 | [diff] [blame] | 2380 | struct regulatory_request *reg_request, *tmp; |
Luis R. Rodriguez | e38f8a7 | 2009-02-21 00:20:39 -0500 | [diff] [blame] | 2381 | struct reg_beacon *reg_beacon, *btmp; |
Luis R. Rodriguez | fe33eb3 | 2009-02-21 00:04:30 -0500 | [diff] [blame] | 2382 | |
| 2383 | cancel_work_sync(®_work); |
Luis R. Rodriguez | a90c7a3 | 2011-04-05 10:49:04 -0700 | [diff] [blame] | 2384 | cancel_delayed_work_sync(®_timeout); |
Luis R. Rodriguez | fe33eb3 | 2009-02-21 00:04:30 -0500 | [diff] [blame] | 2385 | |
Luis R. Rodriguez | a179439 | 2009-02-21 00:04:21 -0500 | [diff] [blame] | 2386 | mutex_lock(&cfg80211_mutex); |
Luis R. Rodriguez | abc7381 | 2009-07-30 17:38:08 -0700 | [diff] [blame] | 2387 | mutex_lock(®_mutex); |
Johannes Berg | 734366d | 2008-09-15 10:56:48 +0200 | [diff] [blame] | 2388 | |
Luis R. Rodriguez | a042994 | 2011-11-28 16:47:15 -0500 | [diff] [blame] | 2389 | reset_regdomains(true); |
Johannes Berg | 734366d | 2008-09-15 10:56:48 +0200 | [diff] [blame] | 2390 | |
Luis R. Rodriguez | 58ebacc | 2011-11-08 14:28:06 -0800 | [diff] [blame] | 2391 | dev_set_uevent_suppress(®_pdev->dev, true); |
Johannes Berg | f6037d0 | 2008-10-21 11:01:33 +0200 | [diff] [blame] | 2392 | |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 2393 | platform_device_unregister(reg_pdev); |
Johannes Berg | 734366d | 2008-09-15 10:56:48 +0200 | [diff] [blame] | 2394 | |
Luis R. Rodriguez | e38f8a7 | 2009-02-21 00:20:39 -0500 | [diff] [blame] | 2395 | spin_lock_bh(®_pending_beacons_lock); |
| 2396 | if (!list_empty(®_pending_beacons)) { |
| 2397 | list_for_each_entry_safe(reg_beacon, btmp, |
| 2398 | ®_pending_beacons, list) { |
| 2399 | list_del(®_beacon->list); |
| 2400 | kfree(reg_beacon); |
| 2401 | } |
| 2402 | } |
| 2403 | spin_unlock_bh(®_pending_beacons_lock); |
| 2404 | |
| 2405 | if (!list_empty(®_beacon_list)) { |
| 2406 | list_for_each_entry_safe(reg_beacon, btmp, |
| 2407 | ®_beacon_list, list) { |
| 2408 | list_del(®_beacon->list); |
| 2409 | kfree(reg_beacon); |
| 2410 | } |
| 2411 | } |
| 2412 | |
Luis R. Rodriguez | fe33eb3 | 2009-02-21 00:04:30 -0500 | [diff] [blame] | 2413 | spin_lock(®_requests_lock); |
| 2414 | if (!list_empty(®_requests_list)) { |
| 2415 | list_for_each_entry_safe(reg_request, tmp, |
| 2416 | ®_requests_list, list) { |
| 2417 | list_del(®_request->list); |
| 2418 | kfree(reg_request); |
| 2419 | } |
| 2420 | } |
| 2421 | spin_unlock(®_requests_lock); |
| 2422 | |
Luis R. Rodriguez | abc7381 | 2009-07-30 17:38:08 -0700 | [diff] [blame] | 2423 | mutex_unlock(®_mutex); |
Luis R. Rodriguez | a179439 | 2009-02-21 00:04:21 -0500 | [diff] [blame] | 2424 | mutex_unlock(&cfg80211_mutex); |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 2425 | } |