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 |
Luis R. Rodriguez | 57b5ce0 | 2012-07-12 11:49:18 -0700 | [diff] [blame] | 100 | * - reg_num_devs_support_basehint |
Luis R. Rodriguez | abc7381 | 2009-07-30 17:38:08 -0700 | [diff] [blame] | 101 | */ |
John W. Linville | 670b7f1 | 2010-06-24 11:26:31 -0400 | [diff] [blame] | 102 | static DEFINE_MUTEX(reg_mutex); |
Johannes Berg | 46a5eba | 2010-09-15 13:28:15 +0200 | [diff] [blame] | 103 | |
Luis R. Rodriguez | 57b5ce0 | 2012-07-12 11:49:18 -0700 | [diff] [blame] | 104 | /* |
| 105 | * Number of devices that registered to the core |
| 106 | * that support cellular base station regulatory hints |
| 107 | */ |
| 108 | static int reg_num_devs_support_basehint; |
| 109 | |
Johannes Berg | 46a5eba | 2010-09-15 13:28:15 +0200 | [diff] [blame] | 110 | static inline void assert_reg_lock(void) |
| 111 | { |
| 112 | lockdep_assert_held(®_mutex); |
| 113 | } |
Luis R. Rodriguez | abc7381 | 2009-07-30 17:38:08 -0700 | [diff] [blame] | 114 | |
Luis R. Rodriguez | e38f8a7 | 2009-02-21 00:20:39 -0500 | [diff] [blame] | 115 | /* Used to queue up regulatory hints */ |
Luis R. Rodriguez | fe33eb3 | 2009-02-21 00:04:30 -0500 | [diff] [blame] | 116 | static LIST_HEAD(reg_requests_list); |
| 117 | static spinlock_t reg_requests_lock; |
| 118 | |
Luis R. Rodriguez | e38f8a7 | 2009-02-21 00:20:39 -0500 | [diff] [blame] | 119 | /* Used to queue up beacon hints for review */ |
| 120 | static LIST_HEAD(reg_pending_beacons); |
| 121 | static spinlock_t reg_pending_beacons_lock; |
| 122 | |
| 123 | /* Used to keep track of processed beacon hints */ |
| 124 | static LIST_HEAD(reg_beacon_list); |
| 125 | |
| 126 | struct reg_beacon { |
| 127 | struct list_head list; |
| 128 | struct ieee80211_channel chan; |
| 129 | }; |
| 130 | |
Luis R. Rodriguez | f333a7a | 2010-11-17 21:46:07 -0800 | [diff] [blame] | 131 | static void reg_todo(struct work_struct *work); |
| 132 | static DECLARE_WORK(reg_work, reg_todo); |
| 133 | |
Luis R. Rodriguez | a90c7a3 | 2011-04-05 10:49:04 -0700 | [diff] [blame] | 134 | static void reg_timeout_work(struct work_struct *work); |
| 135 | static DECLARE_DELAYED_WORK(reg_timeout, reg_timeout_work); |
| 136 | |
Johannes Berg | 734366d | 2008-09-15 10:56:48 +0200 | [diff] [blame] | 137 | /* We keep a static world regulatory domain in case of the absence of CRDA */ |
| 138 | static const struct ieee80211_regdomain world_regdom = { |
Vladimir Kondratiev | 90cdc6d | 2012-07-02 09:32:34 +0300 | [diff] [blame] | 139 | .n_reg_rules = 6, |
Johannes Berg | 734366d | 2008-09-15 10:56:48 +0200 | [diff] [blame] | 140 | .alpha2 = "00", |
| 141 | .reg_rules = { |
Luis R. Rodriguez | 68798a6 | 2009-02-21 00:20:37 -0500 | [diff] [blame] | 142 | /* IEEE 802.11b/g, channels 1..11 */ |
| 143 | REG_RULE(2412-10, 2462+10, 40, 6, 20, 0), |
Luis R. Rodriguez | 611b6a8 | 2009-03-05 21:19:21 -0800 | [diff] [blame] | 144 | /* IEEE 802.11b/g, channels 12..13. No HT40 |
| 145 | * channel fits here. */ |
| 146 | REG_RULE(2467-10, 2472+10, 20, 6, 20, |
Luis R. Rodriguez | 3fc71f7 | 2009-02-21 00:20:38 -0500 | [diff] [blame] | 147 | NL80211_RRF_PASSIVE_SCAN | |
| 148 | NL80211_RRF_NO_IBSS), |
Luis R. Rodriguez | 611b6a8 | 2009-03-05 21:19:21 -0800 | [diff] [blame] | 149 | /* IEEE 802.11 channel 14 - Only JP enables |
| 150 | * this and for 802.11b only */ |
| 151 | REG_RULE(2484-10, 2484+10, 20, 6, 20, |
| 152 | NL80211_RRF_PASSIVE_SCAN | |
| 153 | NL80211_RRF_NO_IBSS | |
| 154 | NL80211_RRF_NO_OFDM), |
| 155 | /* IEEE 802.11a, channel 36..48 */ |
Luis R. Rodriguez | ec329ac | 2009-03-05 21:19:22 -0800 | [diff] [blame] | 156 | REG_RULE(5180-10, 5240+10, 40, 6, 20, |
Luis R. Rodriguez | 611b6a8 | 2009-03-05 21:19:21 -0800 | [diff] [blame] | 157 | NL80211_RRF_PASSIVE_SCAN | |
| 158 | NL80211_RRF_NO_IBSS), |
Luis R. Rodriguez | 3fc71f7 | 2009-02-21 00:20:38 -0500 | [diff] [blame] | 159 | |
| 160 | /* NB: 5260 MHz - 5700 MHz requies DFS */ |
| 161 | |
| 162 | /* IEEE 802.11a, channel 149..165 */ |
Luis R. Rodriguez | ec329ac | 2009-03-05 21:19:22 -0800 | [diff] [blame] | 163 | REG_RULE(5745-10, 5825+10, 40, 6, 20, |
Luis R. Rodriguez | 3fc71f7 | 2009-02-21 00:20:38 -0500 | [diff] [blame] | 164 | NL80211_RRF_PASSIVE_SCAN | |
| 165 | NL80211_RRF_NO_IBSS), |
Vladimir Kondratiev | 90cdc6d | 2012-07-02 09:32:34 +0300 | [diff] [blame] | 166 | |
| 167 | /* IEEE 802.11ad (60gHz), channels 1..3 */ |
| 168 | REG_RULE(56160+2160*1-1080, 56160+2160*3+1080, 2160, 0, 0, 0), |
Johannes Berg | 734366d | 2008-09-15 10:56:48 +0200 | [diff] [blame] | 169 | } |
| 170 | }; |
| 171 | |
Johannes Berg | a3d2eaf | 2008-09-15 11:10:52 +0200 | [diff] [blame] | 172 | static const struct ieee80211_regdomain *cfg80211_world_regdom = |
| 173 | &world_regdom; |
Johannes Berg | 734366d | 2008-09-15 10:56:48 +0200 | [diff] [blame] | 174 | |
Luis R. Rodriguez | 6ee7d33 | 2009-03-20 23:53:06 -0400 | [diff] [blame] | 175 | static char *ieee80211_regdom = "00"; |
Luis R. Rodriguez | 09d989d | 2010-01-29 19:58:57 -0500 | [diff] [blame] | 176 | static char user_alpha2[2]; |
Luis R. Rodriguez | 6ee7d33 | 2009-03-20 23:53:06 -0400 | [diff] [blame] | 177 | |
Johannes Berg | 734366d | 2008-09-15 10:56:48 +0200 | [diff] [blame] | 178 | module_param(ieee80211_regdom, charp, 0444); |
| 179 | MODULE_PARM_DESC(ieee80211_regdom, "IEEE 802.11 regulatory domain code"); |
| 180 | |
Luis R. Rodriguez | a042994 | 2011-11-28 16:47:15 -0500 | [diff] [blame] | 181 | static void reset_regdomains(bool full_reset) |
Johannes Berg | 734366d | 2008-09-15 10:56:48 +0200 | [diff] [blame] | 182 | { |
Johannes Berg | 942b25c | 2008-09-15 11:26:47 +0200 | [diff] [blame] | 183 | /* avoid freeing static information or freeing something twice */ |
| 184 | if (cfg80211_regdomain == cfg80211_world_regdom) |
| 185 | cfg80211_regdomain = NULL; |
| 186 | if (cfg80211_world_regdom == &world_regdom) |
| 187 | cfg80211_world_regdom = NULL; |
| 188 | if (cfg80211_regdomain == &world_regdom) |
| 189 | cfg80211_regdomain = NULL; |
Johannes Berg | 942b25c | 2008-09-15 11:26:47 +0200 | [diff] [blame] | 190 | |
| 191 | kfree(cfg80211_regdomain); |
| 192 | kfree(cfg80211_world_regdom); |
Johannes Berg | 734366d | 2008-09-15 10:56:48 +0200 | [diff] [blame] | 193 | |
Johannes Berg | a3d2eaf | 2008-09-15 11:10:52 +0200 | [diff] [blame] | 194 | cfg80211_world_regdom = &world_regdom; |
Johannes Berg | 734366d | 2008-09-15 10:56:48 +0200 | [diff] [blame] | 195 | cfg80211_regdomain = NULL; |
Luis R. Rodriguez | a042994 | 2011-11-28 16:47:15 -0500 | [diff] [blame] | 196 | |
| 197 | if (!full_reset) |
| 198 | return; |
| 199 | |
| 200 | if (last_request != &core_request_world) |
| 201 | kfree(last_request); |
| 202 | last_request = &core_request_world; |
Johannes Berg | 734366d | 2008-09-15 10:56:48 +0200 | [diff] [blame] | 203 | } |
| 204 | |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 205 | /* |
| 206 | * Dynamic world regulatory domain requested by the wireless |
| 207 | * core upon initialization |
| 208 | */ |
Johannes Berg | a3d2eaf | 2008-09-15 11:10:52 +0200 | [diff] [blame] | 209 | static void update_world_regdomain(const struct ieee80211_regdomain *rd) |
Johannes Berg | 734366d | 2008-09-15 10:56:48 +0200 | [diff] [blame] | 210 | { |
Johannes Berg | f6037d0 | 2008-10-21 11:01:33 +0200 | [diff] [blame] | 211 | BUG_ON(!last_request); |
Johannes Berg | 734366d | 2008-09-15 10:56:48 +0200 | [diff] [blame] | 212 | |
Luis R. Rodriguez | a042994 | 2011-11-28 16:47:15 -0500 | [diff] [blame] | 213 | reset_regdomains(false); |
Johannes Berg | 734366d | 2008-09-15 10:56:48 +0200 | [diff] [blame] | 214 | |
| 215 | cfg80211_world_regdom = rd; |
| 216 | cfg80211_regdomain = rd; |
| 217 | } |
Johannes Berg | 734366d | 2008-09-15 10:56:48 +0200 | [diff] [blame] | 218 | |
Johannes Berg | a3d2eaf | 2008-09-15 11:10:52 +0200 | [diff] [blame] | 219 | bool is_world_regdom(const char *alpha2) |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 220 | { |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 221 | if (!alpha2) |
| 222 | return false; |
| 223 | if (alpha2[0] == '0' && alpha2[1] == '0') |
| 224 | return true; |
| 225 | return false; |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 226 | } |
| 227 | |
Johannes Berg | a3d2eaf | 2008-09-15 11:10:52 +0200 | [diff] [blame] | 228 | static bool is_alpha2_set(const char *alpha2) |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 229 | { |
| 230 | if (!alpha2) |
| 231 | return false; |
| 232 | if (alpha2[0] != 0 && alpha2[1] != 0) |
| 233 | return true; |
| 234 | return false; |
| 235 | } |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 236 | |
Johannes Berg | a3d2eaf | 2008-09-15 11:10:52 +0200 | [diff] [blame] | 237 | static bool is_unknown_alpha2(const char *alpha2) |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 238 | { |
| 239 | if (!alpha2) |
| 240 | return false; |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 241 | /* |
| 242 | * Special case where regulatory domain was built by driver |
| 243 | * but a specific alpha2 cannot be determined |
| 244 | */ |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 245 | if (alpha2[0] == '9' && alpha2[1] == '9') |
| 246 | return true; |
| 247 | return false; |
| 248 | } |
| 249 | |
Luis R. Rodriguez | 3f2355c | 2008-11-12 14:22:02 -0800 | [diff] [blame] | 250 | static bool is_intersected_alpha2(const char *alpha2) |
| 251 | { |
| 252 | if (!alpha2) |
| 253 | return false; |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 254 | /* |
| 255 | * Special case where regulatory domain is the |
Luis R. Rodriguez | 3f2355c | 2008-11-12 14:22:02 -0800 | [diff] [blame] | 256 | * result of an intersection between two regulatory domain |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 257 | * structures |
| 258 | */ |
Luis R. Rodriguez | 3f2355c | 2008-11-12 14:22:02 -0800 | [diff] [blame] | 259 | if (alpha2[0] == '9' && alpha2[1] == '8') |
| 260 | return true; |
| 261 | return false; |
| 262 | } |
| 263 | |
Johannes Berg | a3d2eaf | 2008-09-15 11:10:52 +0200 | [diff] [blame] | 264 | static bool is_an_alpha2(const char *alpha2) |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 265 | { |
| 266 | if (!alpha2) |
| 267 | return false; |
John W. Linville | c61029c | 2010-08-05 14:26:24 -0400 | [diff] [blame] | 268 | if (isalpha(alpha2[0]) && isalpha(alpha2[1])) |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 269 | return true; |
| 270 | return false; |
| 271 | } |
| 272 | |
Johannes Berg | a3d2eaf | 2008-09-15 11:10:52 +0200 | [diff] [blame] | 273 | 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] | 274 | { |
| 275 | if (!alpha2_x || !alpha2_y) |
| 276 | return false; |
| 277 | if (alpha2_x[0] == alpha2_y[0] && |
| 278 | alpha2_x[1] == alpha2_y[1]) |
| 279 | return true; |
| 280 | return false; |
| 281 | } |
| 282 | |
Luis R. Rodriguez | 69b1572 | 2009-02-21 00:04:33 -0500 | [diff] [blame] | 283 | static bool regdom_changes(const char *alpha2) |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 284 | { |
Luis R. Rodriguez | 761cf7e | 2009-02-21 00:04:25 -0500 | [diff] [blame] | 285 | assert_cfg80211_lock(); |
| 286 | |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 287 | if (!cfg80211_regdomain) |
| 288 | return true; |
| 289 | if (alpha2_equal(cfg80211_regdomain->alpha2, alpha2)) |
| 290 | return false; |
| 291 | return true; |
| 292 | } |
| 293 | |
Luis R. Rodriguez | 09d989d | 2010-01-29 19:58:57 -0500 | [diff] [blame] | 294 | /* |
| 295 | * The NL80211_REGDOM_SET_BY_USER regdom alpha2 is cached, this lets |
| 296 | * you know if a valid regulatory hint with NL80211_REGDOM_SET_BY_USER |
| 297 | * has ever been issued. |
| 298 | */ |
| 299 | static bool is_user_regdom_saved(void) |
| 300 | { |
| 301 | if (user_alpha2[0] == '9' && user_alpha2[1] == '7') |
| 302 | return false; |
| 303 | |
| 304 | /* This would indicate a mistake on the design */ |
| 305 | if (WARN((!is_world_regdom(user_alpha2) && |
| 306 | !is_an_alpha2(user_alpha2)), |
| 307 | "Unexpected user alpha2: %c%c\n", |
| 308 | user_alpha2[0], |
| 309 | user_alpha2[1])) |
| 310 | return false; |
| 311 | |
| 312 | return true; |
| 313 | } |
| 314 | |
John W. Linville | 3b377ea | 2009-12-18 17:59:01 -0500 | [diff] [blame] | 315 | static int reg_copy_regd(const struct ieee80211_regdomain **dst_regd, |
| 316 | const struct ieee80211_regdomain *src_regd) |
| 317 | { |
| 318 | struct ieee80211_regdomain *regd; |
| 319 | int size_of_regd = 0; |
| 320 | unsigned int i; |
| 321 | |
| 322 | size_of_regd = sizeof(struct ieee80211_regdomain) + |
| 323 | ((src_regd->n_reg_rules + 1) * sizeof(struct ieee80211_reg_rule)); |
| 324 | |
| 325 | regd = kzalloc(size_of_regd, GFP_KERNEL); |
| 326 | if (!regd) |
| 327 | return -ENOMEM; |
| 328 | |
| 329 | memcpy(regd, src_regd, sizeof(struct ieee80211_regdomain)); |
| 330 | |
| 331 | for (i = 0; i < src_regd->n_reg_rules; i++) |
| 332 | memcpy(®d->reg_rules[i], &src_regd->reg_rules[i], |
| 333 | sizeof(struct ieee80211_reg_rule)); |
| 334 | |
| 335 | *dst_regd = regd; |
| 336 | return 0; |
| 337 | } |
| 338 | |
| 339 | #ifdef CONFIG_CFG80211_INTERNAL_REGDB |
| 340 | struct reg_regdb_search_request { |
| 341 | char alpha2[2]; |
| 342 | struct list_head list; |
| 343 | }; |
| 344 | |
| 345 | static LIST_HEAD(reg_regdb_search_list); |
John W. Linville | 368d06f | 2010-03-16 15:40:59 -0400 | [diff] [blame] | 346 | static DEFINE_MUTEX(reg_regdb_search_mutex); |
John W. Linville | 3b377ea | 2009-12-18 17:59:01 -0500 | [diff] [blame] | 347 | |
| 348 | static void reg_regdb_search(struct work_struct *work) |
| 349 | { |
| 350 | struct reg_regdb_search_request *request; |
| 351 | const struct ieee80211_regdomain *curdom, *regdom; |
| 352 | int i, r; |
| 353 | |
John W. Linville | 368d06f | 2010-03-16 15:40:59 -0400 | [diff] [blame] | 354 | mutex_lock(®_regdb_search_mutex); |
John W. Linville | 3b377ea | 2009-12-18 17:59:01 -0500 | [diff] [blame] | 355 | while (!list_empty(®_regdb_search_list)) { |
| 356 | request = list_first_entry(®_regdb_search_list, |
| 357 | struct reg_regdb_search_request, |
| 358 | list); |
| 359 | list_del(&request->list); |
| 360 | |
| 361 | for (i=0; i<reg_regdb_size; i++) { |
| 362 | curdom = reg_regdb[i]; |
| 363 | |
| 364 | if (!memcmp(request->alpha2, curdom->alpha2, 2)) { |
| 365 | r = reg_copy_regd(®dom, curdom); |
| 366 | if (r) |
| 367 | break; |
John W. Linville | 3b377ea | 2009-12-18 17:59:01 -0500 | [diff] [blame] | 368 | mutex_lock(&cfg80211_mutex); |
| 369 | set_regdom(regdom); |
| 370 | mutex_unlock(&cfg80211_mutex); |
John W. Linville | 3b377ea | 2009-12-18 17:59:01 -0500 | [diff] [blame] | 371 | break; |
| 372 | } |
| 373 | } |
| 374 | |
| 375 | kfree(request); |
| 376 | } |
John W. Linville | 368d06f | 2010-03-16 15:40:59 -0400 | [diff] [blame] | 377 | mutex_unlock(®_regdb_search_mutex); |
John W. Linville | 3b377ea | 2009-12-18 17:59:01 -0500 | [diff] [blame] | 378 | } |
| 379 | |
| 380 | static DECLARE_WORK(reg_regdb_work, reg_regdb_search); |
| 381 | |
| 382 | static void reg_regdb_query(const char *alpha2) |
| 383 | { |
| 384 | struct reg_regdb_search_request *request; |
| 385 | |
| 386 | if (!alpha2) |
| 387 | return; |
| 388 | |
| 389 | request = kzalloc(sizeof(struct reg_regdb_search_request), GFP_KERNEL); |
| 390 | if (!request) |
| 391 | return; |
| 392 | |
| 393 | memcpy(request->alpha2, alpha2, 2); |
| 394 | |
John W. Linville | 368d06f | 2010-03-16 15:40:59 -0400 | [diff] [blame] | 395 | mutex_lock(®_regdb_search_mutex); |
John W. Linville | 3b377ea | 2009-12-18 17:59:01 -0500 | [diff] [blame] | 396 | list_add_tail(&request->list, ®_regdb_search_list); |
John W. Linville | 368d06f | 2010-03-16 15:40:59 -0400 | [diff] [blame] | 397 | mutex_unlock(®_regdb_search_mutex); |
John W. Linville | 3b377ea | 2009-12-18 17:59:01 -0500 | [diff] [blame] | 398 | |
| 399 | schedule_work(®_regdb_work); |
| 400 | } |
Luis R. Rodriguez | 80007ef | 2012-03-23 07:23:31 -0700 | [diff] [blame] | 401 | |
| 402 | /* Feel free to add any other sanity checks here */ |
| 403 | static void reg_regdb_size_check(void) |
| 404 | { |
| 405 | /* We should ideally BUILD_BUG_ON() but then random builds would fail */ |
| 406 | WARN_ONCE(!reg_regdb_size, "db.txt is empty, you should update it..."); |
| 407 | } |
John W. Linville | 3b377ea | 2009-12-18 17:59:01 -0500 | [diff] [blame] | 408 | #else |
Luis R. Rodriguez | 80007ef | 2012-03-23 07:23:31 -0700 | [diff] [blame] | 409 | static inline void reg_regdb_size_check(void) {} |
John W. Linville | 3b377ea | 2009-12-18 17:59:01 -0500 | [diff] [blame] | 410 | static inline void reg_regdb_query(const char *alpha2) {} |
| 411 | #endif /* CONFIG_CFG80211_INTERNAL_REGDB */ |
| 412 | |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 413 | /* |
| 414 | * 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] | 415 | * basis in userspace. Country information is filled in by |
| 416 | * reg_device_uevent |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 417 | */ |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 418 | static int call_crda(const char *alpha2) |
| 419 | { |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 420 | if (!is_world_regdom((char *) alpha2)) |
Joe Perches | e9c0268 | 2010-11-16 19:56:49 -0800 | [diff] [blame] | 421 | pr_info("Calling CRDA for country: %c%c\n", |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 422 | alpha2[0], alpha2[1]); |
| 423 | else |
Joe Perches | e9c0268 | 2010-11-16 19:56:49 -0800 | [diff] [blame] | 424 | pr_info("Calling CRDA to update world regulatory domain\n"); |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 425 | |
John W. Linville | 3b377ea | 2009-12-18 17:59:01 -0500 | [diff] [blame] | 426 | /* query internal regulatory database (if it exists) */ |
| 427 | reg_regdb_query(alpha2); |
| 428 | |
Scott James Remnant | 4d9d88d | 2011-03-08 10:45:30 -0800 | [diff] [blame] | 429 | return kobject_uevent(®_pdev->dev.kobj, KOBJ_CHANGE); |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 430 | } |
| 431 | |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 432 | /* Used by nl80211 before kmalloc'ing our regulatory domain */ |
Johannes Berg | a3d2eaf | 2008-09-15 11:10:52 +0200 | [diff] [blame] | 433 | bool reg_is_valid_request(const char *alpha2) |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 434 | { |
Luis R. Rodriguez | 61405e9 | 2009-05-13 17:04:41 -0400 | [diff] [blame] | 435 | assert_cfg80211_lock(); |
| 436 | |
Johannes Berg | f6037d0 | 2008-10-21 11:01:33 +0200 | [diff] [blame] | 437 | if (!last_request) |
| 438 | return false; |
| 439 | |
| 440 | return alpha2_equal(last_request->alpha2, alpha2); |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 441 | } |
| 442 | |
| 443 | /* Sanity check on a regulatory rule */ |
Johannes Berg | a3d2eaf | 2008-09-15 11:10:52 +0200 | [diff] [blame] | 444 | 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] | 445 | { |
Johannes Berg | a3d2eaf | 2008-09-15 11:10:52 +0200 | [diff] [blame] | 446 | const struct ieee80211_freq_range *freq_range = &rule->freq_range; |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 447 | u32 freq_diff; |
| 448 | |
Luis R. Rodriguez | 91e9900 | 2008-11-12 14:21:55 -0800 | [diff] [blame] | 449 | 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] | 450 | return false; |
| 451 | |
| 452 | if (freq_range->start_freq_khz > freq_range->end_freq_khz) |
| 453 | return false; |
| 454 | |
| 455 | freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz; |
| 456 | |
Roel Kluin | bd05f28 | 2009-03-03 22:55:21 +0100 | [diff] [blame] | 457 | if (freq_range->end_freq_khz <= freq_range->start_freq_khz || |
| 458 | freq_range->max_bandwidth_khz > freq_diff) |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 459 | return false; |
| 460 | |
| 461 | return true; |
| 462 | } |
| 463 | |
Johannes Berg | a3d2eaf | 2008-09-15 11:10:52 +0200 | [diff] [blame] | 464 | static bool is_valid_rd(const struct ieee80211_regdomain *rd) |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 465 | { |
Johannes Berg | a3d2eaf | 2008-09-15 11:10:52 +0200 | [diff] [blame] | 466 | const struct ieee80211_reg_rule *reg_rule = NULL; |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 467 | unsigned int i; |
| 468 | |
| 469 | if (!rd->n_reg_rules) |
| 470 | return false; |
| 471 | |
Luis R. Rodriguez | 88dc1c3 | 2008-11-12 14:22:01 -0800 | [diff] [blame] | 472 | if (WARN_ON(rd->n_reg_rules > NL80211_MAX_SUPP_REG_RULES)) |
| 473 | return false; |
| 474 | |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 475 | for (i = 0; i < rd->n_reg_rules; i++) { |
| 476 | reg_rule = &rd->reg_rules[i]; |
| 477 | if (!is_valid_reg_rule(reg_rule)) |
| 478 | return false; |
| 479 | } |
| 480 | |
| 481 | return true; |
| 482 | } |
| 483 | |
Luis R. Rodriguez | 038659e | 2009-05-02 00:37:17 -0400 | [diff] [blame] | 484 | static bool reg_does_bw_fit(const struct ieee80211_freq_range *freq_range, |
| 485 | u32 center_freq_khz, |
| 486 | u32 bw_khz) |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 487 | { |
Luis R. Rodriguez | 038659e | 2009-05-02 00:37:17 -0400 | [diff] [blame] | 488 | u32 start_freq_khz, end_freq_khz; |
| 489 | |
| 490 | start_freq_khz = center_freq_khz - (bw_khz/2); |
| 491 | end_freq_khz = center_freq_khz + (bw_khz/2); |
| 492 | |
| 493 | if (start_freq_khz >= freq_range->start_freq_khz && |
| 494 | end_freq_khz <= freq_range->end_freq_khz) |
| 495 | return true; |
| 496 | |
| 497 | return false; |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 498 | } |
| 499 | |
Luis R. Rodriguez | 0c7dc45 | 2009-01-07 17:43:36 -0800 | [diff] [blame] | 500 | /** |
| 501 | * freq_in_rule_band - tells us if a frequency is in a frequency band |
| 502 | * @freq_range: frequency rule we want to query |
| 503 | * @freq_khz: frequency we are inquiring about |
| 504 | * |
| 505 | * This lets us know if a specific frequency rule is or is not relevant to |
| 506 | * a specific frequency's band. Bands are device specific and artificial |
Vladimir Kondratiev | 64629b9 | 2012-09-23 09:49:54 +0200 | [diff] [blame^] | 507 | * definitions (the "2.4 GHz band", the "5 GHz band" and the "60GHz band"), |
| 508 | * however it is safe for now to assume that a frequency rule should not be |
| 509 | * part of a frequency's band if the start freq or end freq are off by more |
| 510 | * than 2 GHz for the 2.4 and 5 GHz bands, and by more than 10 GHz for the |
| 511 | * 60 GHz band. |
Luis R. Rodriguez | 0c7dc45 | 2009-01-07 17:43:36 -0800 | [diff] [blame] | 512 | * This resolution can be lowered and should be considered as we add |
| 513 | * regulatory rule support for other "bands". |
| 514 | **/ |
| 515 | static bool freq_in_rule_band(const struct ieee80211_freq_range *freq_range, |
| 516 | u32 freq_khz) |
| 517 | { |
| 518 | #define ONE_GHZ_IN_KHZ 1000000 |
Vladimir Kondratiev | 64629b9 | 2012-09-23 09:49:54 +0200 | [diff] [blame^] | 519 | /* |
| 520 | * From 802.11ad: directional multi-gigabit (DMG): |
| 521 | * Pertaining to operation in a frequency band containing a channel |
| 522 | * with the Channel starting frequency above 45 GHz. |
| 523 | */ |
| 524 | u32 limit = freq_khz > 45 * ONE_GHZ_IN_KHZ ? |
| 525 | 10 * ONE_GHZ_IN_KHZ : 2 * ONE_GHZ_IN_KHZ; |
| 526 | if (abs(freq_khz - freq_range->start_freq_khz) <= limit) |
Luis R. Rodriguez | 0c7dc45 | 2009-01-07 17:43:36 -0800 | [diff] [blame] | 527 | return true; |
Vladimir Kondratiev | 64629b9 | 2012-09-23 09:49:54 +0200 | [diff] [blame^] | 528 | if (abs(freq_khz - freq_range->end_freq_khz) <= limit) |
Luis R. Rodriguez | 0c7dc45 | 2009-01-07 17:43:36 -0800 | [diff] [blame] | 529 | return true; |
| 530 | return false; |
| 531 | #undef ONE_GHZ_IN_KHZ |
| 532 | } |
| 533 | |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 534 | /* |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 535 | * Helper for regdom_intersect(), this does the real |
| 536 | * mathematical intersection fun |
| 537 | */ |
Luis R. Rodriguez | 9c96477 | 2008-10-30 13:33:53 -0700 | [diff] [blame] | 538 | static int reg_rules_intersect( |
| 539 | const struct ieee80211_reg_rule *rule1, |
| 540 | const struct ieee80211_reg_rule *rule2, |
| 541 | struct ieee80211_reg_rule *intersected_rule) |
| 542 | { |
| 543 | const struct ieee80211_freq_range *freq_range1, *freq_range2; |
| 544 | struct ieee80211_freq_range *freq_range; |
| 545 | const struct ieee80211_power_rule *power_rule1, *power_rule2; |
| 546 | struct ieee80211_power_rule *power_rule; |
| 547 | u32 freq_diff; |
| 548 | |
| 549 | freq_range1 = &rule1->freq_range; |
| 550 | freq_range2 = &rule2->freq_range; |
| 551 | freq_range = &intersected_rule->freq_range; |
| 552 | |
| 553 | power_rule1 = &rule1->power_rule; |
| 554 | power_rule2 = &rule2->power_rule; |
| 555 | power_rule = &intersected_rule->power_rule; |
| 556 | |
| 557 | freq_range->start_freq_khz = max(freq_range1->start_freq_khz, |
| 558 | freq_range2->start_freq_khz); |
| 559 | freq_range->end_freq_khz = min(freq_range1->end_freq_khz, |
| 560 | freq_range2->end_freq_khz); |
| 561 | freq_range->max_bandwidth_khz = min(freq_range1->max_bandwidth_khz, |
| 562 | freq_range2->max_bandwidth_khz); |
| 563 | |
| 564 | freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz; |
| 565 | if (freq_range->max_bandwidth_khz > freq_diff) |
| 566 | freq_range->max_bandwidth_khz = freq_diff; |
| 567 | |
| 568 | power_rule->max_eirp = min(power_rule1->max_eirp, |
| 569 | power_rule2->max_eirp); |
| 570 | power_rule->max_antenna_gain = min(power_rule1->max_antenna_gain, |
| 571 | power_rule2->max_antenna_gain); |
| 572 | |
| 573 | intersected_rule->flags = (rule1->flags | rule2->flags); |
| 574 | |
| 575 | if (!is_valid_reg_rule(intersected_rule)) |
| 576 | return -EINVAL; |
| 577 | |
| 578 | return 0; |
| 579 | } |
| 580 | |
| 581 | /** |
| 582 | * regdom_intersect - do the intersection between two regulatory domains |
| 583 | * @rd1: first regulatory domain |
| 584 | * @rd2: second regulatory domain |
| 585 | * |
| 586 | * Use this function to get the intersection between two regulatory domains. |
| 587 | * Once completed we will mark the alpha2 for the rd as intersected, "98", |
| 588 | * as no one single alpha2 can represent this regulatory domain. |
| 589 | * |
| 590 | * Returns a pointer to the regulatory domain structure which will hold the |
| 591 | * resulting intersection of rules between rd1 and rd2. We will |
| 592 | * kzalloc() this structure for you. |
| 593 | */ |
| 594 | static struct ieee80211_regdomain *regdom_intersect( |
| 595 | const struct ieee80211_regdomain *rd1, |
| 596 | const struct ieee80211_regdomain *rd2) |
| 597 | { |
| 598 | int r, size_of_regd; |
| 599 | unsigned int x, y; |
| 600 | unsigned int num_rules = 0, rule_idx = 0; |
| 601 | const struct ieee80211_reg_rule *rule1, *rule2; |
| 602 | struct ieee80211_reg_rule *intersected_rule; |
| 603 | struct ieee80211_regdomain *rd; |
| 604 | /* This is just a dummy holder to help us count */ |
| 605 | struct ieee80211_reg_rule irule; |
| 606 | |
| 607 | /* Uses the stack temporarily for counter arithmetic */ |
| 608 | intersected_rule = &irule; |
| 609 | |
| 610 | memset(intersected_rule, 0, sizeof(struct ieee80211_reg_rule)); |
| 611 | |
| 612 | if (!rd1 || !rd2) |
| 613 | return NULL; |
| 614 | |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 615 | /* |
| 616 | * 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] | 617 | * build them. This is to so we can malloc() and free() a |
| 618 | * regdomain once. The reason we use reg_rules_intersect() here |
| 619 | * 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] | 620 | * All rules that do check out OK are valid. |
| 621 | */ |
Luis R. Rodriguez | 9c96477 | 2008-10-30 13:33:53 -0700 | [diff] [blame] | 622 | |
| 623 | for (x = 0; x < rd1->n_reg_rules; x++) { |
| 624 | rule1 = &rd1->reg_rules[x]; |
| 625 | for (y = 0; y < rd2->n_reg_rules; y++) { |
| 626 | rule2 = &rd2->reg_rules[y]; |
| 627 | if (!reg_rules_intersect(rule1, rule2, |
| 628 | intersected_rule)) |
| 629 | num_rules++; |
| 630 | memset(intersected_rule, 0, |
| 631 | sizeof(struct ieee80211_reg_rule)); |
| 632 | } |
| 633 | } |
| 634 | |
| 635 | if (!num_rules) |
| 636 | return NULL; |
| 637 | |
| 638 | size_of_regd = sizeof(struct ieee80211_regdomain) + |
| 639 | ((num_rules + 1) * sizeof(struct ieee80211_reg_rule)); |
| 640 | |
| 641 | rd = kzalloc(size_of_regd, GFP_KERNEL); |
| 642 | if (!rd) |
| 643 | return NULL; |
| 644 | |
| 645 | for (x = 0; x < rd1->n_reg_rules; x++) { |
| 646 | rule1 = &rd1->reg_rules[x]; |
| 647 | for (y = 0; y < rd2->n_reg_rules; y++) { |
| 648 | rule2 = &rd2->reg_rules[y]; |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 649 | /* |
| 650 | * This time around instead of using the stack lets |
Luis R. Rodriguez | 9c96477 | 2008-10-30 13:33:53 -0700 | [diff] [blame] | 651 | * write to the target rule directly saving ourselves |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 652 | * a memcpy() |
| 653 | */ |
Luis R. Rodriguez | 9c96477 | 2008-10-30 13:33:53 -0700 | [diff] [blame] | 654 | intersected_rule = &rd->reg_rules[rule_idx]; |
| 655 | r = reg_rules_intersect(rule1, rule2, |
| 656 | intersected_rule); |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 657 | /* |
| 658 | * No need to memset here the intersected rule here as |
| 659 | * we're not using the stack anymore |
| 660 | */ |
Luis R. Rodriguez | 9c96477 | 2008-10-30 13:33:53 -0700 | [diff] [blame] | 661 | if (r) |
| 662 | continue; |
| 663 | rule_idx++; |
| 664 | } |
| 665 | } |
| 666 | |
| 667 | if (rule_idx != num_rules) { |
| 668 | kfree(rd); |
| 669 | return NULL; |
| 670 | } |
| 671 | |
| 672 | rd->n_reg_rules = num_rules; |
| 673 | rd->alpha2[0] = '9'; |
| 674 | rd->alpha2[1] = '8'; |
| 675 | |
| 676 | return rd; |
| 677 | } |
| 678 | |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 679 | /* |
| 680 | * XXX: add support for the rest of enum nl80211_reg_rule_flags, we may |
| 681 | * want to just have the channel structure use these |
| 682 | */ |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 683 | static u32 map_regdom_flags(u32 rd_flags) |
| 684 | { |
| 685 | u32 channel_flags = 0; |
| 686 | if (rd_flags & NL80211_RRF_PASSIVE_SCAN) |
| 687 | channel_flags |= IEEE80211_CHAN_PASSIVE_SCAN; |
| 688 | if (rd_flags & NL80211_RRF_NO_IBSS) |
| 689 | channel_flags |= IEEE80211_CHAN_NO_IBSS; |
| 690 | if (rd_flags & NL80211_RRF_DFS) |
| 691 | channel_flags |= IEEE80211_CHAN_RADAR; |
Seth Forshee | 03f6b08 | 2012-08-01 15:58:42 -0500 | [diff] [blame] | 692 | if (rd_flags & NL80211_RRF_NO_OFDM) |
| 693 | channel_flags |= IEEE80211_CHAN_NO_OFDM; |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 694 | return channel_flags; |
| 695 | } |
| 696 | |
Luis R. Rodriguez | 1fa25e4 | 2009-01-22 15:05:44 -0800 | [diff] [blame] | 697 | static int freq_reg_info_regd(struct wiphy *wiphy, |
| 698 | u32 center_freq, |
Luis R. Rodriguez | 038659e | 2009-05-02 00:37:17 -0400 | [diff] [blame] | 699 | u32 desired_bw_khz, |
Luis R. Rodriguez | 1fa25e4 | 2009-01-22 15:05:44 -0800 | [diff] [blame] | 700 | const struct ieee80211_reg_rule **reg_rule, |
| 701 | const struct ieee80211_regdomain *custom_regd) |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 702 | { |
| 703 | int i; |
Luis R. Rodriguez | 0c7dc45 | 2009-01-07 17:43:36 -0800 | [diff] [blame] | 704 | bool band_rule_found = false; |
Luis R. Rodriguez | 3e0c3ff | 2009-01-07 17:43:34 -0800 | [diff] [blame] | 705 | const struct ieee80211_regdomain *regd; |
Luis R. Rodriguez | 038659e | 2009-05-02 00:37:17 -0400 | [diff] [blame] | 706 | bool bw_fits = false; |
| 707 | |
| 708 | if (!desired_bw_khz) |
| 709 | desired_bw_khz = MHZ_TO_KHZ(20); |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 710 | |
Luis R. Rodriguez | 1fa25e4 | 2009-01-22 15:05:44 -0800 | [diff] [blame] | 711 | regd = custom_regd ? custom_regd : cfg80211_regdomain; |
Luis R. Rodriguez | 3e0c3ff | 2009-01-07 17:43:34 -0800 | [diff] [blame] | 712 | |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 713 | /* |
| 714 | * Follow the driver's regulatory domain, if present, unless a country |
| 715 | * IE has been processed or a user wants to help complaince further |
| 716 | */ |
Luis R. Rodriguez | 2784fe9 | 2010-12-15 19:24:11 -0800 | [diff] [blame] | 717 | if (!custom_regd && |
| 718 | last_request->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && |
Luis R. Rodriguez | 7db90f4 | 2009-03-09 22:07:41 -0400 | [diff] [blame] | 719 | last_request->initiator != NL80211_REGDOM_SET_BY_USER && |
Luis R. Rodriguez | 3e0c3ff | 2009-01-07 17:43:34 -0800 | [diff] [blame] | 720 | wiphy->regd) |
| 721 | regd = wiphy->regd; |
| 722 | |
| 723 | if (!regd) |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 724 | return -EINVAL; |
| 725 | |
Luis R. Rodriguez | 3e0c3ff | 2009-01-07 17:43:34 -0800 | [diff] [blame] | 726 | for (i = 0; i < regd->n_reg_rules; i++) { |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 727 | const struct ieee80211_reg_rule *rr; |
| 728 | const struct ieee80211_freq_range *fr = NULL; |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 729 | |
Luis R. Rodriguez | 3e0c3ff | 2009-01-07 17:43:34 -0800 | [diff] [blame] | 730 | rr = ®d->reg_rules[i]; |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 731 | fr = &rr->freq_range; |
Luis R. Rodriguez | 0c7dc45 | 2009-01-07 17:43:36 -0800 | [diff] [blame] | 732 | |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 733 | /* |
| 734 | * We only need to know if one frequency rule was |
Luis R. Rodriguez | 0c7dc45 | 2009-01-07 17:43:36 -0800 | [diff] [blame] | 735 | * was in center_freq's band, that's enough, so lets |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 736 | * not overwrite it once found |
| 737 | */ |
Luis R. Rodriguez | 0c7dc45 | 2009-01-07 17:43:36 -0800 | [diff] [blame] | 738 | if (!band_rule_found) |
| 739 | band_rule_found = freq_in_rule_band(fr, center_freq); |
| 740 | |
Luis R. Rodriguez | 038659e | 2009-05-02 00:37:17 -0400 | [diff] [blame] | 741 | bw_fits = reg_does_bw_fit(fr, |
| 742 | center_freq, |
| 743 | desired_bw_khz); |
Luis R. Rodriguez | 0c7dc45 | 2009-01-07 17:43:36 -0800 | [diff] [blame] | 744 | |
Luis R. Rodriguez | 038659e | 2009-05-02 00:37:17 -0400 | [diff] [blame] | 745 | if (band_rule_found && bw_fits) { |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 746 | *reg_rule = rr; |
Luis R. Rodriguez | 038659e | 2009-05-02 00:37:17 -0400 | [diff] [blame] | 747 | return 0; |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 748 | } |
| 749 | } |
| 750 | |
Luis R. Rodriguez | 0c7dc45 | 2009-01-07 17:43:36 -0800 | [diff] [blame] | 751 | if (!band_rule_found) |
| 752 | return -ERANGE; |
| 753 | |
Luis R. Rodriguez | 038659e | 2009-05-02 00:37:17 -0400 | [diff] [blame] | 754 | return -EINVAL; |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 755 | } |
| 756 | |
Luis R. Rodriguez | 038659e | 2009-05-02 00:37:17 -0400 | [diff] [blame] | 757 | int freq_reg_info(struct wiphy *wiphy, |
| 758 | u32 center_freq, |
| 759 | u32 desired_bw_khz, |
| 760 | const struct ieee80211_reg_rule **reg_rule) |
Luis R. Rodriguez | 1fa25e4 | 2009-01-22 15:05:44 -0800 | [diff] [blame] | 761 | { |
Luis R. Rodriguez | ac46d48 | 2009-05-01 18:44:50 -0400 | [diff] [blame] | 762 | assert_cfg80211_lock(); |
Luis R. Rodriguez | 038659e | 2009-05-02 00:37:17 -0400 | [diff] [blame] | 763 | return freq_reg_info_regd(wiphy, |
| 764 | center_freq, |
| 765 | desired_bw_khz, |
| 766 | reg_rule, |
| 767 | NULL); |
Luis R. Rodriguez | 1fa25e4 | 2009-01-22 15:05:44 -0800 | [diff] [blame] | 768 | } |
John W. Linville | 4f366c5 | 2010-07-15 14:57:33 -0400 | [diff] [blame] | 769 | EXPORT_SYMBOL(freq_reg_info); |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 770 | |
Luis R. Rodriguez | 926a0a0 | 2010-10-21 19:17:03 +0530 | [diff] [blame] | 771 | #ifdef CONFIG_CFG80211_REG_DEBUG |
| 772 | static const char *reg_initiator_name(enum nl80211_reg_initiator initiator) |
| 773 | { |
| 774 | switch (initiator) { |
| 775 | case NL80211_REGDOM_SET_BY_CORE: |
| 776 | return "Set by core"; |
| 777 | case NL80211_REGDOM_SET_BY_USER: |
| 778 | return "Set by user"; |
| 779 | case NL80211_REGDOM_SET_BY_DRIVER: |
| 780 | return "Set by driver"; |
| 781 | case NL80211_REGDOM_SET_BY_COUNTRY_IE: |
| 782 | return "Set by country IE"; |
| 783 | default: |
| 784 | WARN_ON(1); |
| 785 | return "Set by bug"; |
| 786 | } |
| 787 | } |
Luis R. Rodriguez | e702d3c | 2010-10-21 19:17:04 +0530 | [diff] [blame] | 788 | |
| 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 | const struct ieee80211_power_rule *power_rule; |
| 794 | const struct ieee80211_freq_range *freq_range; |
| 795 | char max_antenna_gain[32]; |
| 796 | |
| 797 | power_rule = ®_rule->power_rule; |
| 798 | freq_range = ®_rule->freq_range; |
| 799 | |
| 800 | if (!power_rule->max_antenna_gain) |
| 801 | snprintf(max_antenna_gain, 32, "N/A"); |
| 802 | else |
| 803 | snprintf(max_antenna_gain, 32, "%d", power_rule->max_antenna_gain); |
| 804 | |
Luis R. Rodriguez | d91e41b | 2010-10-20 10:18:59 -0700 | [diff] [blame] | 805 | REG_DBG_PRINT("Updating information on frequency %d MHz " |
Bob Copeland | ff039c6 | 2010-12-29 17:09:02 -0500 | [diff] [blame] | 806 | "for a %d MHz width channel with regulatory rule:\n", |
Luis R. Rodriguez | e702d3c | 2010-10-21 19:17:04 +0530 | [diff] [blame] | 807 | chan->center_freq, |
| 808 | KHZ_TO_MHZ(desired_bw_khz)); |
| 809 | |
Pavel Roskin | 56e6786 | 2011-09-01 11:54:12 -0400 | [diff] [blame] | 810 | 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] | 811 | freq_range->start_freq_khz, |
| 812 | freq_range->end_freq_khz, |
Pavel Roskin | 56e6786 | 2011-09-01 11:54:12 -0400 | [diff] [blame] | 813 | freq_range->max_bandwidth_khz, |
Luis R. Rodriguez | e702d3c | 2010-10-21 19:17:04 +0530 | [diff] [blame] | 814 | max_antenna_gain, |
| 815 | power_rule->max_eirp); |
| 816 | } |
| 817 | #else |
| 818 | static void chan_reg_rule_print_dbg(struct ieee80211_channel *chan, |
| 819 | u32 desired_bw_khz, |
| 820 | const struct ieee80211_reg_rule *reg_rule) |
| 821 | { |
| 822 | return; |
| 823 | } |
Luis R. Rodriguez | 926a0a0 | 2010-10-21 19:17:03 +0530 | [diff] [blame] | 824 | #endif |
| 825 | |
Luis R. Rodriguez | 038659e | 2009-05-02 00:37:17 -0400 | [diff] [blame] | 826 | /* |
| 827 | * Note that right now we assume the desired channel bandwidth |
| 828 | * is always 20 MHz for each individual channel (HT40 uses 20 MHz |
| 829 | * per channel, the primary and the extension channel). To support |
| 830 | * smaller custom bandwidths such as 5 MHz or 10 MHz we'll need a |
| 831 | * new ieee80211_channel.target_bw and re run the regulatory check |
| 832 | * on the wiphy with the target_bw specified. Then we can simply use |
| 833 | * that below for the desired_bw_khz below. |
| 834 | */ |
Luis R. Rodriguez | 7ca43d0 | 2010-10-20 10:18:53 -0700 | [diff] [blame] | 835 | static void handle_channel(struct wiphy *wiphy, |
| 836 | enum nl80211_reg_initiator initiator, |
| 837 | enum ieee80211_band band, |
Luis R. Rodriguez | a92a3ce | 2009-01-07 17:43:33 -0800 | [diff] [blame] | 838 | unsigned int chan_idx) |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 839 | { |
| 840 | int r; |
Luis R. Rodriguez | 038659e | 2009-05-02 00:37:17 -0400 | [diff] [blame] | 841 | u32 flags, bw_flags = 0; |
| 842 | u32 desired_bw_khz = MHZ_TO_KHZ(20); |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 843 | const struct ieee80211_reg_rule *reg_rule = NULL; |
| 844 | const struct ieee80211_power_rule *power_rule = NULL; |
Luis R. Rodriguez | 038659e | 2009-05-02 00:37:17 -0400 | [diff] [blame] | 845 | const struct ieee80211_freq_range *freq_range = NULL; |
Luis R. Rodriguez | a92a3ce | 2009-01-07 17:43:33 -0800 | [diff] [blame] | 846 | struct ieee80211_supported_band *sband; |
| 847 | struct ieee80211_channel *chan; |
Luis R. Rodriguez | fe33eb3 | 2009-02-21 00:04:30 -0500 | [diff] [blame] | 848 | struct wiphy *request_wiphy = NULL; |
Luis R. Rodriguez | a92a3ce | 2009-01-07 17:43:33 -0800 | [diff] [blame] | 849 | |
Luis R. Rodriguez | 761cf7e | 2009-02-21 00:04:25 -0500 | [diff] [blame] | 850 | assert_cfg80211_lock(); |
| 851 | |
Luis R. Rodriguez | 806a9e3 | 2009-02-21 00:04:26 -0500 | [diff] [blame] | 852 | request_wiphy = wiphy_idx_to_wiphy(last_request->wiphy_idx); |
| 853 | |
Luis R. Rodriguez | a92a3ce | 2009-01-07 17:43:33 -0800 | [diff] [blame] | 854 | sband = wiphy->bands[band]; |
| 855 | BUG_ON(chan_idx >= sband->n_channels); |
| 856 | chan = &sband->channels[chan_idx]; |
| 857 | |
| 858 | flags = chan->orig_flags; |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 859 | |
Luis R. Rodriguez | 038659e | 2009-05-02 00:37:17 -0400 | [diff] [blame] | 860 | r = freq_reg_info(wiphy, |
| 861 | MHZ_TO_KHZ(chan->center_freq), |
| 862 | desired_bw_khz, |
| 863 | ®_rule); |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 864 | |
Luis R. Rodriguez | ca4ffe8 | 2010-10-20 10:18:55 -0700 | [diff] [blame] | 865 | if (r) { |
| 866 | /* |
| 867 | * We will disable all channels that do not match our |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 868 | * received regulatory rule unless the hint is coming |
Luis R. Rodriguez | ca4ffe8 | 2010-10-20 10:18:55 -0700 | [diff] [blame] | 869 | * from a Country IE and the Country IE had no information |
| 870 | * about a band. The IEEE 802.11 spec allows for an AP |
| 871 | * to send only a subset of the regulatory rules allowed, |
| 872 | * so an AP in the US that only supports 2.4 GHz may only send |
| 873 | * a country IE with information for the 2.4 GHz band |
| 874 | * while 5 GHz is still supported. |
| 875 | */ |
| 876 | if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE && |
| 877 | r == -ERANGE) |
| 878 | return; |
| 879 | |
Luis R. Rodriguez | d91e41b | 2010-10-20 10:18:59 -0700 | [diff] [blame] | 880 | REG_DBG_PRINT("Disabling freq %d MHz\n", chan->center_freq); |
Luis R. Rodriguez | ca4ffe8 | 2010-10-20 10:18:55 -0700 | [diff] [blame] | 881 | chan->flags = IEEE80211_CHAN_DISABLED; |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 882 | return; |
Luis R. Rodriguez | ca4ffe8 | 2010-10-20 10:18:55 -0700 | [diff] [blame] | 883 | } |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 884 | |
Luis R. Rodriguez | e702d3c | 2010-10-21 19:17:04 +0530 | [diff] [blame] | 885 | chan_reg_rule_print_dbg(chan, desired_bw_khz, reg_rule); |
| 886 | |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 887 | power_rule = ®_rule->power_rule; |
Luis R. Rodriguez | 038659e | 2009-05-02 00:37:17 -0400 | [diff] [blame] | 888 | freq_range = ®_rule->freq_range; |
| 889 | |
| 890 | if (freq_range->max_bandwidth_khz < MHZ_TO_KHZ(40)) |
| 891 | bw_flags = IEEE80211_CHAN_NO_HT40; |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 892 | |
Luis R. Rodriguez | 7db90f4 | 2009-03-09 22:07:41 -0400 | [diff] [blame] | 893 | if (last_request->initiator == NL80211_REGDOM_SET_BY_DRIVER && |
Luis R. Rodriguez | 806a9e3 | 2009-02-21 00:04:26 -0500 | [diff] [blame] | 894 | request_wiphy && request_wiphy == wiphy && |
Johannes Berg | 5be83de | 2009-11-19 00:56:28 +0100 | [diff] [blame] | 895 | request_wiphy->flags & WIPHY_FLAG_STRICT_REGULATORY) { |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 896 | /* |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 897 | * This guarantees the driver's requested regulatory domain |
Luis R. Rodriguez | f976376 | 2009-01-22 15:05:52 -0800 | [diff] [blame] | 898 | * will always be used as a base for further regulatory |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 899 | * settings |
| 900 | */ |
Luis R. Rodriguez | f976376 | 2009-01-22 15:05:52 -0800 | [diff] [blame] | 901 | chan->flags = chan->orig_flags = |
Luis R. Rodriguez | 038659e | 2009-05-02 00:37:17 -0400 | [diff] [blame] | 902 | map_regdom_flags(reg_rule->flags) | bw_flags; |
Luis R. Rodriguez | f976376 | 2009-01-22 15:05:52 -0800 | [diff] [blame] | 903 | chan->max_antenna_gain = chan->orig_mag = |
| 904 | (int) MBI_TO_DBI(power_rule->max_antenna_gain); |
Luis R. Rodriguez | f976376 | 2009-01-22 15:05:52 -0800 | [diff] [blame] | 905 | chan->max_power = chan->orig_mpwr = |
| 906 | (int) MBM_TO_DBM(power_rule->max_eirp); |
| 907 | return; |
| 908 | } |
| 909 | |
Rajkumar Manoharan | aa3d7ee | 2011-09-14 14:28:17 +0530 | [diff] [blame] | 910 | chan->beacon_found = false; |
Luis R. Rodriguez | 038659e | 2009-05-02 00:37:17 -0400 | [diff] [blame] | 911 | chan->flags = flags | bw_flags | map_regdom_flags(reg_rule->flags); |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 912 | chan->max_antenna_gain = min(chan->orig_mag, |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 913 | (int) MBI_TO_DBI(power_rule->max_antenna_gain)); |
Hong Wu | eccc068 | 2012-01-11 20:33:39 +0200 | [diff] [blame] | 914 | chan->max_reg_power = (int) MBM_TO_DBM(power_rule->max_eirp); |
Stanislaw Gruszka | 5e31fc0 | 2012-07-24 08:35:39 +0200 | [diff] [blame] | 915 | if (chan->orig_mpwr) { |
| 916 | /* |
| 917 | * Devices that have their own custom regulatory domain |
| 918 | * but also use WIPHY_FLAG_STRICT_REGULATORY will follow the |
| 919 | * passed country IE power settings. |
| 920 | */ |
| 921 | if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE && |
| 922 | wiphy->flags & WIPHY_FLAG_CUSTOM_REGULATORY && |
| 923 | wiphy->flags & WIPHY_FLAG_STRICT_REGULATORY) |
| 924 | chan->max_power = chan->max_reg_power; |
| 925 | else |
| 926 | chan->max_power = min(chan->orig_mpwr, |
| 927 | chan->max_reg_power); |
| 928 | } else |
| 929 | chan->max_power = chan->max_reg_power; |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 930 | } |
| 931 | |
Luis R. Rodriguez | 7ca43d0 | 2010-10-20 10:18:53 -0700 | [diff] [blame] | 932 | static void handle_band(struct wiphy *wiphy, |
| 933 | enum ieee80211_band band, |
| 934 | enum nl80211_reg_initiator initiator) |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 935 | { |
Luis R. Rodriguez | a92a3ce | 2009-01-07 17:43:33 -0800 | [diff] [blame] | 936 | unsigned int i; |
| 937 | struct ieee80211_supported_band *sband; |
| 938 | |
| 939 | BUG_ON(!wiphy->bands[band]); |
| 940 | sband = wiphy->bands[band]; |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 941 | |
| 942 | for (i = 0; i < sband->n_channels; i++) |
Luis R. Rodriguez | 7ca43d0 | 2010-10-20 10:18:53 -0700 | [diff] [blame] | 943 | handle_channel(wiphy, initiator, band, i); |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 944 | } |
| 945 | |
Luis R. Rodriguez | 57b5ce0 | 2012-07-12 11:49:18 -0700 | [diff] [blame] | 946 | static bool reg_request_cell_base(struct regulatory_request *request) |
| 947 | { |
| 948 | if (request->initiator != NL80211_REGDOM_SET_BY_USER) |
| 949 | return false; |
| 950 | if (request->user_reg_hint_type != NL80211_USER_REG_HINT_CELL_BASE) |
| 951 | return false; |
| 952 | return true; |
| 953 | } |
| 954 | |
| 955 | bool reg_last_request_cell_base(void) |
| 956 | { |
Mohammed Shafi Shajakhan | ebd0fd2 | 2012-07-18 18:11:29 +0530 | [diff] [blame] | 957 | bool val; |
Luis R. Rodriguez | 57b5ce0 | 2012-07-12 11:49:18 -0700 | [diff] [blame] | 958 | assert_cfg80211_lock(); |
| 959 | |
| 960 | mutex_lock(®_mutex); |
Mohammed Shafi Shajakhan | ebd0fd2 | 2012-07-18 18:11:29 +0530 | [diff] [blame] | 961 | val = reg_request_cell_base(last_request); |
Luis R. Rodriguez | 57b5ce0 | 2012-07-12 11:49:18 -0700 | [diff] [blame] | 962 | mutex_unlock(®_mutex); |
Mohammed Shafi Shajakhan | ebd0fd2 | 2012-07-18 18:11:29 +0530 | [diff] [blame] | 963 | return val; |
Luis R. Rodriguez | 57b5ce0 | 2012-07-12 11:49:18 -0700 | [diff] [blame] | 964 | } |
| 965 | |
| 966 | #ifdef CONFIG_CFG80211_CERTIFICATION_ONUS |
| 967 | |
| 968 | /* Core specific check */ |
| 969 | static int reg_ignore_cell_hint(struct regulatory_request *pending_request) |
| 970 | { |
| 971 | if (!reg_num_devs_support_basehint) |
| 972 | return -EOPNOTSUPP; |
| 973 | |
| 974 | if (reg_request_cell_base(last_request)) { |
| 975 | if (!regdom_changes(pending_request->alpha2)) |
| 976 | return -EALREADY; |
| 977 | return 0; |
| 978 | } |
| 979 | return 0; |
| 980 | } |
| 981 | |
| 982 | /* Device specific check */ |
| 983 | static bool reg_dev_ignore_cell_hint(struct wiphy *wiphy) |
| 984 | { |
| 985 | if (!(wiphy->features & NL80211_FEATURE_CELL_BASE_REG_HINTS)) |
| 986 | return true; |
| 987 | return false; |
| 988 | } |
| 989 | #else |
| 990 | static int reg_ignore_cell_hint(struct regulatory_request *pending_request) |
| 991 | { |
| 992 | return -EOPNOTSUPP; |
| 993 | } |
| 994 | static int reg_dev_ignore_cell_hint(struct wiphy *wiphy) |
| 995 | { |
| 996 | return true; |
| 997 | } |
| 998 | #endif |
| 999 | |
| 1000 | |
Luis R. Rodriguez | 7db90f4 | 2009-03-09 22:07:41 -0400 | [diff] [blame] | 1001 | static bool ignore_reg_update(struct wiphy *wiphy, |
| 1002 | enum nl80211_reg_initiator initiator) |
Luis R. Rodriguez | 14b9815 | 2008-11-12 14:22:03 -0800 | [diff] [blame] | 1003 | { |
Luis R. Rodriguez | 926a0a0 | 2010-10-21 19:17:03 +0530 | [diff] [blame] | 1004 | if (!last_request) { |
Luis R. Rodriguez | d91e41b | 2010-10-20 10:18:59 -0700 | [diff] [blame] | 1005 | REG_DBG_PRINT("Ignoring regulatory request %s since " |
Luis R. Rodriguez | 926a0a0 | 2010-10-21 19:17:03 +0530 | [diff] [blame] | 1006 | "last_request is not set\n", |
| 1007 | reg_initiator_name(initiator)); |
Luis R. Rodriguez | 14b9815 | 2008-11-12 14:22:03 -0800 | [diff] [blame] | 1008 | return true; |
Luis R. Rodriguez | 926a0a0 | 2010-10-21 19:17:03 +0530 | [diff] [blame] | 1009 | } |
| 1010 | |
Luis R. Rodriguez | 7db90f4 | 2009-03-09 22:07:41 -0400 | [diff] [blame] | 1011 | if (initiator == NL80211_REGDOM_SET_BY_CORE && |
Luis R. Rodriguez | 926a0a0 | 2010-10-21 19:17:03 +0530 | [diff] [blame] | 1012 | wiphy->flags & WIPHY_FLAG_CUSTOM_REGULATORY) { |
Luis R. Rodriguez | d91e41b | 2010-10-20 10:18:59 -0700 | [diff] [blame] | 1013 | REG_DBG_PRINT("Ignoring regulatory request %s " |
Luis R. Rodriguez | 926a0a0 | 2010-10-21 19:17:03 +0530 | [diff] [blame] | 1014 | "since the driver uses its own custom " |
Joe Perches | 12c5ffb | 2011-07-29 14:51:25 -0700 | [diff] [blame] | 1015 | "regulatory domain\n", |
Luis R. Rodriguez | 926a0a0 | 2010-10-21 19:17:03 +0530 | [diff] [blame] | 1016 | reg_initiator_name(initiator)); |
Luis R. Rodriguez | 14b9815 | 2008-11-12 14:22:03 -0800 | [diff] [blame] | 1017 | return true; |
Luis R. Rodriguez | 926a0a0 | 2010-10-21 19:17:03 +0530 | [diff] [blame] | 1018 | } |
| 1019 | |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 1020 | /* |
| 1021 | * wiphy->regd will be set once the device has its own |
| 1022 | * desired regulatory domain set |
| 1023 | */ |
Johannes Berg | 5be83de | 2009-11-19 00:56:28 +0100 | [diff] [blame] | 1024 | if (wiphy->flags & WIPHY_FLAG_STRICT_REGULATORY && !wiphy->regd && |
Luis R. Rodriguez | 749b527 | 2010-10-20 10:18:54 -0700 | [diff] [blame] | 1025 | initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && |
Luis R. Rodriguez | 926a0a0 | 2010-10-21 19:17:03 +0530 | [diff] [blame] | 1026 | !is_world_regdom(last_request->alpha2)) { |
Luis R. Rodriguez | d91e41b | 2010-10-20 10:18:59 -0700 | [diff] [blame] | 1027 | REG_DBG_PRINT("Ignoring regulatory request %s " |
Mihai Moldovan | 5bc91db | 2011-07-25 11:18:58 +0200 | [diff] [blame] | 1028 | "since the driver requires its own regulatory " |
Joe Perches | 12c5ffb | 2011-07-29 14:51:25 -0700 | [diff] [blame] | 1029 | "domain to be set first\n", |
Luis R. Rodriguez | 926a0a0 | 2010-10-21 19:17:03 +0530 | [diff] [blame] | 1030 | reg_initiator_name(initiator)); |
Luis R. Rodriguez | 14b9815 | 2008-11-12 14:22:03 -0800 | [diff] [blame] | 1031 | return true; |
Luis R. Rodriguez | 926a0a0 | 2010-10-21 19:17:03 +0530 | [diff] [blame] | 1032 | } |
| 1033 | |
Luis R. Rodriguez | 57b5ce0 | 2012-07-12 11:49:18 -0700 | [diff] [blame] | 1034 | if (reg_request_cell_base(last_request)) |
| 1035 | return reg_dev_ignore_cell_hint(wiphy); |
| 1036 | |
Luis R. Rodriguez | 14b9815 | 2008-11-12 14:22:03 -0800 | [diff] [blame] | 1037 | return false; |
| 1038 | } |
| 1039 | |
Luis R. Rodriguez | e38f8a7 | 2009-02-21 00:20:39 -0500 | [diff] [blame] | 1040 | static void handle_reg_beacon(struct wiphy *wiphy, |
| 1041 | unsigned int chan_idx, |
| 1042 | struct reg_beacon *reg_beacon) |
| 1043 | { |
Luis R. Rodriguez | e38f8a7 | 2009-02-21 00:20:39 -0500 | [diff] [blame] | 1044 | struct ieee80211_supported_band *sband; |
| 1045 | struct ieee80211_channel *chan; |
Luis R. Rodriguez | 6bad876 | 2009-04-02 14:08:09 -0400 | [diff] [blame] | 1046 | bool channel_changed = false; |
| 1047 | struct ieee80211_channel chan_before; |
Luis R. Rodriguez | e38f8a7 | 2009-02-21 00:20:39 -0500 | [diff] [blame] | 1048 | |
| 1049 | assert_cfg80211_lock(); |
| 1050 | |
| 1051 | sband = wiphy->bands[reg_beacon->chan.band]; |
| 1052 | chan = &sband->channels[chan_idx]; |
| 1053 | |
| 1054 | if (likely(chan->center_freq != reg_beacon->chan.center_freq)) |
| 1055 | return; |
| 1056 | |
Luis R. Rodriguez | 6bad876 | 2009-04-02 14:08:09 -0400 | [diff] [blame] | 1057 | if (chan->beacon_found) |
| 1058 | return; |
| 1059 | |
| 1060 | chan->beacon_found = true; |
| 1061 | |
Johannes Berg | 5be83de | 2009-11-19 00:56:28 +0100 | [diff] [blame] | 1062 | if (wiphy->flags & WIPHY_FLAG_DISABLE_BEACON_HINTS) |
Luis R. Rodriguez | 3718424 | 2009-07-30 17:43:48 -0700 | [diff] [blame] | 1063 | return; |
| 1064 | |
Luis R. Rodriguez | 6bad876 | 2009-04-02 14:08:09 -0400 | [diff] [blame] | 1065 | chan_before.center_freq = chan->center_freq; |
| 1066 | chan_before.flags = chan->flags; |
| 1067 | |
Luis R. Rodriguez | 3718424 | 2009-07-30 17:43:48 -0700 | [diff] [blame] | 1068 | if (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN) { |
Luis R. Rodriguez | e38f8a7 | 2009-02-21 00:20:39 -0500 | [diff] [blame] | 1069 | chan->flags &= ~IEEE80211_CHAN_PASSIVE_SCAN; |
Luis R. Rodriguez | 6bad876 | 2009-04-02 14:08:09 -0400 | [diff] [blame] | 1070 | channel_changed = true; |
Luis R. Rodriguez | e38f8a7 | 2009-02-21 00:20:39 -0500 | [diff] [blame] | 1071 | } |
| 1072 | |
Luis R. Rodriguez | 3718424 | 2009-07-30 17:43:48 -0700 | [diff] [blame] | 1073 | if (chan->flags & IEEE80211_CHAN_NO_IBSS) { |
Luis R. Rodriguez | e38f8a7 | 2009-02-21 00:20:39 -0500 | [diff] [blame] | 1074 | chan->flags &= ~IEEE80211_CHAN_NO_IBSS; |
Luis R. Rodriguez | 6bad876 | 2009-04-02 14:08:09 -0400 | [diff] [blame] | 1075 | channel_changed = true; |
Luis R. Rodriguez | e38f8a7 | 2009-02-21 00:20:39 -0500 | [diff] [blame] | 1076 | } |
| 1077 | |
Luis R. Rodriguez | 6bad876 | 2009-04-02 14:08:09 -0400 | [diff] [blame] | 1078 | if (channel_changed) |
| 1079 | nl80211_send_beacon_hint_event(wiphy, &chan_before, chan); |
Luis R. Rodriguez | e38f8a7 | 2009-02-21 00:20:39 -0500 | [diff] [blame] | 1080 | } |
| 1081 | |
| 1082 | /* |
| 1083 | * Called when a scan on a wiphy finds a beacon on |
| 1084 | * new channel |
| 1085 | */ |
| 1086 | static void wiphy_update_new_beacon(struct wiphy *wiphy, |
| 1087 | struct reg_beacon *reg_beacon) |
| 1088 | { |
| 1089 | unsigned int i; |
| 1090 | struct ieee80211_supported_band *sband; |
| 1091 | |
| 1092 | assert_cfg80211_lock(); |
| 1093 | |
| 1094 | if (!wiphy->bands[reg_beacon->chan.band]) |
| 1095 | return; |
| 1096 | |
| 1097 | sband = wiphy->bands[reg_beacon->chan.band]; |
| 1098 | |
| 1099 | for (i = 0; i < sband->n_channels; i++) |
| 1100 | handle_reg_beacon(wiphy, i, reg_beacon); |
| 1101 | } |
| 1102 | |
| 1103 | /* |
| 1104 | * Called upon reg changes or a new wiphy is added |
| 1105 | */ |
| 1106 | static void wiphy_update_beacon_reg(struct wiphy *wiphy) |
| 1107 | { |
| 1108 | unsigned int i; |
| 1109 | struct ieee80211_supported_band *sband; |
| 1110 | struct reg_beacon *reg_beacon; |
| 1111 | |
| 1112 | assert_cfg80211_lock(); |
| 1113 | |
| 1114 | if (list_empty(®_beacon_list)) |
| 1115 | return; |
| 1116 | |
| 1117 | list_for_each_entry(reg_beacon, ®_beacon_list, list) { |
| 1118 | if (!wiphy->bands[reg_beacon->chan.band]) |
| 1119 | continue; |
| 1120 | sband = wiphy->bands[reg_beacon->chan.band]; |
| 1121 | for (i = 0; i < sband->n_channels; i++) |
| 1122 | handle_reg_beacon(wiphy, i, reg_beacon); |
| 1123 | } |
| 1124 | } |
| 1125 | |
| 1126 | static bool reg_is_world_roaming(struct wiphy *wiphy) |
| 1127 | { |
| 1128 | if (is_world_regdom(cfg80211_regdomain->alpha2) || |
| 1129 | (wiphy->regd && is_world_regdom(wiphy->regd->alpha2))) |
| 1130 | return true; |
Luis R. Rodriguez | b1ed8dd | 2009-05-02 00:34:15 -0400 | [diff] [blame] | 1131 | if (last_request && |
| 1132 | last_request->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && |
Johannes Berg | 5be83de | 2009-11-19 00:56:28 +0100 | [diff] [blame] | 1133 | wiphy->flags & WIPHY_FLAG_CUSTOM_REGULATORY) |
Luis R. Rodriguez | e38f8a7 | 2009-02-21 00:20:39 -0500 | [diff] [blame] | 1134 | return true; |
| 1135 | return false; |
| 1136 | } |
| 1137 | |
| 1138 | /* Reap the advantages of previously found beacons */ |
| 1139 | static void reg_process_beacons(struct wiphy *wiphy) |
| 1140 | { |
Luis R. Rodriguez | b1ed8dd | 2009-05-02 00:34:15 -0400 | [diff] [blame] | 1141 | /* |
| 1142 | * Means we are just firing up cfg80211, so no beacons would |
| 1143 | * have been processed yet. |
| 1144 | */ |
| 1145 | if (!last_request) |
| 1146 | return; |
Luis R. Rodriguez | e38f8a7 | 2009-02-21 00:20:39 -0500 | [diff] [blame] | 1147 | if (!reg_is_world_roaming(wiphy)) |
| 1148 | return; |
| 1149 | wiphy_update_beacon_reg(wiphy); |
| 1150 | } |
| 1151 | |
Luis R. Rodriguez | 038659e | 2009-05-02 00:37:17 -0400 | [diff] [blame] | 1152 | static bool is_ht40_not_allowed(struct ieee80211_channel *chan) |
| 1153 | { |
| 1154 | if (!chan) |
| 1155 | return true; |
| 1156 | if (chan->flags & IEEE80211_CHAN_DISABLED) |
| 1157 | return true; |
| 1158 | /* This would happen when regulatory rules disallow HT40 completely */ |
| 1159 | if (IEEE80211_CHAN_NO_HT40 == (chan->flags & (IEEE80211_CHAN_NO_HT40))) |
| 1160 | return true; |
| 1161 | return false; |
| 1162 | } |
| 1163 | |
| 1164 | static void reg_process_ht_flags_channel(struct wiphy *wiphy, |
| 1165 | enum ieee80211_band band, |
| 1166 | unsigned int chan_idx) |
| 1167 | { |
| 1168 | struct ieee80211_supported_band *sband; |
| 1169 | struct ieee80211_channel *channel; |
| 1170 | struct ieee80211_channel *channel_before = NULL, *channel_after = NULL; |
| 1171 | unsigned int i; |
| 1172 | |
| 1173 | assert_cfg80211_lock(); |
| 1174 | |
| 1175 | sband = wiphy->bands[band]; |
| 1176 | BUG_ON(chan_idx >= sband->n_channels); |
| 1177 | channel = &sband->channels[chan_idx]; |
| 1178 | |
| 1179 | if (is_ht40_not_allowed(channel)) { |
| 1180 | channel->flags |= IEEE80211_CHAN_NO_HT40; |
| 1181 | return; |
| 1182 | } |
| 1183 | |
| 1184 | /* |
| 1185 | * We need to ensure the extension channels exist to |
| 1186 | * be able to use HT40- or HT40+, this finds them (or not) |
| 1187 | */ |
| 1188 | for (i = 0; i < sband->n_channels; i++) { |
| 1189 | struct ieee80211_channel *c = &sband->channels[i]; |
| 1190 | if (c->center_freq == (channel->center_freq - 20)) |
| 1191 | channel_before = c; |
| 1192 | if (c->center_freq == (channel->center_freq + 20)) |
| 1193 | channel_after = c; |
| 1194 | } |
| 1195 | |
| 1196 | /* |
| 1197 | * Please note that this assumes target bandwidth is 20 MHz, |
| 1198 | * if that ever changes we also need to change the below logic |
| 1199 | * to include that as well. |
| 1200 | */ |
| 1201 | if (is_ht40_not_allowed(channel_before)) |
Luis R. Rodriguez | 689da1b | 2009-05-02 00:37:18 -0400 | [diff] [blame] | 1202 | channel->flags |= IEEE80211_CHAN_NO_HT40MINUS; |
Luis R. Rodriguez | 038659e | 2009-05-02 00:37:17 -0400 | [diff] [blame] | 1203 | else |
Luis R. Rodriguez | 689da1b | 2009-05-02 00:37:18 -0400 | [diff] [blame] | 1204 | channel->flags &= ~IEEE80211_CHAN_NO_HT40MINUS; |
Luis R. Rodriguez | 038659e | 2009-05-02 00:37:17 -0400 | [diff] [blame] | 1205 | |
| 1206 | if (is_ht40_not_allowed(channel_after)) |
Luis R. Rodriguez | 689da1b | 2009-05-02 00:37:18 -0400 | [diff] [blame] | 1207 | channel->flags |= IEEE80211_CHAN_NO_HT40PLUS; |
Luis R. Rodriguez | 038659e | 2009-05-02 00:37:17 -0400 | [diff] [blame] | 1208 | else |
Luis R. Rodriguez | 689da1b | 2009-05-02 00:37:18 -0400 | [diff] [blame] | 1209 | channel->flags &= ~IEEE80211_CHAN_NO_HT40PLUS; |
Luis R. Rodriguez | 038659e | 2009-05-02 00:37:17 -0400 | [diff] [blame] | 1210 | } |
| 1211 | |
| 1212 | static void reg_process_ht_flags_band(struct wiphy *wiphy, |
| 1213 | enum ieee80211_band band) |
| 1214 | { |
| 1215 | unsigned int i; |
| 1216 | struct ieee80211_supported_band *sband; |
| 1217 | |
| 1218 | BUG_ON(!wiphy->bands[band]); |
| 1219 | sband = wiphy->bands[band]; |
| 1220 | |
| 1221 | for (i = 0; i < sband->n_channels; i++) |
| 1222 | reg_process_ht_flags_channel(wiphy, band, i); |
| 1223 | } |
| 1224 | |
| 1225 | static void reg_process_ht_flags(struct wiphy *wiphy) |
| 1226 | { |
| 1227 | enum ieee80211_band band; |
| 1228 | |
| 1229 | if (!wiphy) |
| 1230 | return; |
| 1231 | |
| 1232 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) { |
| 1233 | if (wiphy->bands[band]) |
| 1234 | reg_process_ht_flags_band(wiphy, band); |
| 1235 | } |
| 1236 | |
| 1237 | } |
| 1238 | |
Sven Neumann | eac03e3 | 2011-08-30 23:38:53 +0200 | [diff] [blame] | 1239 | static void wiphy_update_regulatory(struct wiphy *wiphy, |
| 1240 | enum nl80211_reg_initiator initiator) |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 1241 | { |
| 1242 | enum ieee80211_band band; |
Luis R. Rodriguez | d46e5b1 | 2009-01-22 15:05:50 -0800 | [diff] [blame] | 1243 | |
Sven Neumann | eac03e3 | 2011-08-30 23:38:53 +0200 | [diff] [blame] | 1244 | assert_reg_lock(); |
| 1245 | |
Luis R. Rodriguez | 7db90f4 | 2009-03-09 22:07:41 -0400 | [diff] [blame] | 1246 | if (ignore_reg_update(wiphy, initiator)) |
Sven Neumann | a203c2a | 2011-07-12 15:52:07 +0200 | [diff] [blame] | 1247 | return; |
| 1248 | |
Luis R. Rodriguez | b68e6b3 | 2011-10-11 10:59:03 -0700 | [diff] [blame] | 1249 | last_request->dfs_region = cfg80211_regdomain->dfs_region; |
| 1250 | |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 1251 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) { |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 1252 | if (wiphy->bands[band]) |
Luis R. Rodriguez | 7ca43d0 | 2010-10-20 10:18:53 -0700 | [diff] [blame] | 1253 | handle_band(wiphy, band, initiator); |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 1254 | } |
Sven Neumann | a203c2a | 2011-07-12 15:52:07 +0200 | [diff] [blame] | 1255 | |
Luis R. Rodriguez | e38f8a7 | 2009-02-21 00:20:39 -0500 | [diff] [blame] | 1256 | reg_process_beacons(wiphy); |
Luis R. Rodriguez | 038659e | 2009-05-02 00:37:17 -0400 | [diff] [blame] | 1257 | reg_process_ht_flags(wiphy); |
Luis R. Rodriguez | 560e28e | 2009-01-07 17:43:32 -0800 | [diff] [blame] | 1258 | if (wiphy->reg_notifier) |
Luis R. Rodriguez | 716f939 | 2009-01-22 15:05:51 -0800 | [diff] [blame] | 1259 | wiphy->reg_notifier(wiphy, last_request); |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 1260 | } |
| 1261 | |
Sven Neumann | d7549cb | 2011-08-30 23:38:54 +0200 | [diff] [blame] | 1262 | static void update_all_wiphy_regulatory(enum nl80211_reg_initiator initiator) |
| 1263 | { |
| 1264 | struct cfg80211_registered_device *rdev; |
Rajkumar Manoharan | 4a38994 | 2011-12-08 23:59:26 +0530 | [diff] [blame] | 1265 | struct wiphy *wiphy; |
Sven Neumann | d7549cb | 2011-08-30 23:38:54 +0200 | [diff] [blame] | 1266 | |
Rajkumar Manoharan | 4a38994 | 2011-12-08 23:59:26 +0530 | [diff] [blame] | 1267 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) { |
| 1268 | wiphy = &rdev->wiphy; |
| 1269 | wiphy_update_regulatory(wiphy, initiator); |
| 1270 | /* |
| 1271 | * Regulatory updates set by CORE are ignored for custom |
| 1272 | * regulatory cards. Let us notify the changes to the driver, |
| 1273 | * as some drivers used this to restore its orig_* reg domain. |
| 1274 | */ |
| 1275 | if (initiator == NL80211_REGDOM_SET_BY_CORE && |
| 1276 | wiphy->flags & WIPHY_FLAG_CUSTOM_REGULATORY && |
| 1277 | wiphy->reg_notifier) |
| 1278 | wiphy->reg_notifier(wiphy, last_request); |
| 1279 | } |
Sven Neumann | d7549cb | 2011-08-30 23:38:54 +0200 | [diff] [blame] | 1280 | } |
| 1281 | |
Luis R. Rodriguez | 1fa25e4 | 2009-01-22 15:05:44 -0800 | [diff] [blame] | 1282 | static void handle_channel_custom(struct wiphy *wiphy, |
| 1283 | enum ieee80211_band band, |
| 1284 | unsigned int chan_idx, |
| 1285 | const struct ieee80211_regdomain *regd) |
| 1286 | { |
| 1287 | int r; |
Luis R. Rodriguez | 038659e | 2009-05-02 00:37:17 -0400 | [diff] [blame] | 1288 | u32 desired_bw_khz = MHZ_TO_KHZ(20); |
| 1289 | u32 bw_flags = 0; |
Luis R. Rodriguez | 1fa25e4 | 2009-01-22 15:05:44 -0800 | [diff] [blame] | 1290 | const struct ieee80211_reg_rule *reg_rule = NULL; |
| 1291 | const struct ieee80211_power_rule *power_rule = NULL; |
Luis R. Rodriguez | 038659e | 2009-05-02 00:37:17 -0400 | [diff] [blame] | 1292 | const struct ieee80211_freq_range *freq_range = NULL; |
Luis R. Rodriguez | 1fa25e4 | 2009-01-22 15:05:44 -0800 | [diff] [blame] | 1293 | struct ieee80211_supported_band *sband; |
| 1294 | struct ieee80211_channel *chan; |
| 1295 | |
Luis R. Rodriguez | abc7381 | 2009-07-30 17:38:08 -0700 | [diff] [blame] | 1296 | assert_reg_lock(); |
Luis R. Rodriguez | ac46d48 | 2009-05-01 18:44:50 -0400 | [diff] [blame] | 1297 | |
Luis R. Rodriguez | 1fa25e4 | 2009-01-22 15:05:44 -0800 | [diff] [blame] | 1298 | sband = wiphy->bands[band]; |
| 1299 | BUG_ON(chan_idx >= sband->n_channels); |
| 1300 | chan = &sband->channels[chan_idx]; |
| 1301 | |
Luis R. Rodriguez | 038659e | 2009-05-02 00:37:17 -0400 | [diff] [blame] | 1302 | r = freq_reg_info_regd(wiphy, |
| 1303 | MHZ_TO_KHZ(chan->center_freq), |
| 1304 | desired_bw_khz, |
| 1305 | ®_rule, |
| 1306 | regd); |
Luis R. Rodriguez | 1fa25e4 | 2009-01-22 15:05:44 -0800 | [diff] [blame] | 1307 | |
| 1308 | if (r) { |
Luis R. Rodriguez | d91e41b | 2010-10-20 10:18:59 -0700 | [diff] [blame] | 1309 | REG_DBG_PRINT("Disabling freq %d MHz as custom " |
Luis R. Rodriguez | a651853 | 2010-10-20 10:18:57 -0700 | [diff] [blame] | 1310 | "regd has no rule that fits a %d MHz " |
| 1311 | "wide channel\n", |
| 1312 | chan->center_freq, |
| 1313 | KHZ_TO_MHZ(desired_bw_khz)); |
Luis R. Rodriguez | 1fa25e4 | 2009-01-22 15:05:44 -0800 | [diff] [blame] | 1314 | chan->flags = IEEE80211_CHAN_DISABLED; |
| 1315 | return; |
| 1316 | } |
| 1317 | |
Luis R. Rodriguez | e702d3c | 2010-10-21 19:17:04 +0530 | [diff] [blame] | 1318 | chan_reg_rule_print_dbg(chan, desired_bw_khz, reg_rule); |
| 1319 | |
Luis R. Rodriguez | 1fa25e4 | 2009-01-22 15:05:44 -0800 | [diff] [blame] | 1320 | power_rule = ®_rule->power_rule; |
Luis R. Rodriguez | 038659e | 2009-05-02 00:37:17 -0400 | [diff] [blame] | 1321 | freq_range = ®_rule->freq_range; |
Luis R. Rodriguez | 1fa25e4 | 2009-01-22 15:05:44 -0800 | [diff] [blame] | 1322 | |
Luis R. Rodriguez | 038659e | 2009-05-02 00:37:17 -0400 | [diff] [blame] | 1323 | if (freq_range->max_bandwidth_khz < MHZ_TO_KHZ(40)) |
| 1324 | bw_flags = IEEE80211_CHAN_NO_HT40; |
| 1325 | |
| 1326 | chan->flags |= map_regdom_flags(reg_rule->flags) | bw_flags; |
Luis R. Rodriguez | 1fa25e4 | 2009-01-22 15:05:44 -0800 | [diff] [blame] | 1327 | 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] | 1328 | chan->max_power = (int) MBM_TO_DBM(power_rule->max_eirp); |
| 1329 | } |
| 1330 | |
| 1331 | static void handle_band_custom(struct wiphy *wiphy, enum ieee80211_band band, |
| 1332 | const struct ieee80211_regdomain *regd) |
| 1333 | { |
| 1334 | unsigned int i; |
| 1335 | struct ieee80211_supported_band *sband; |
| 1336 | |
| 1337 | BUG_ON(!wiphy->bands[band]); |
| 1338 | sband = wiphy->bands[band]; |
| 1339 | |
| 1340 | for (i = 0; i < sband->n_channels; i++) |
| 1341 | handle_channel_custom(wiphy, band, i, regd); |
| 1342 | } |
| 1343 | |
| 1344 | /* Used by drivers prior to wiphy registration */ |
| 1345 | void wiphy_apply_custom_regulatory(struct wiphy *wiphy, |
| 1346 | const struct ieee80211_regdomain *regd) |
| 1347 | { |
| 1348 | enum ieee80211_band band; |
Luis R. Rodriguez | bbcf3f0 | 2009-05-19 17:49:47 -0400 | [diff] [blame] | 1349 | unsigned int bands_set = 0; |
Luis R. Rodriguez | ac46d48 | 2009-05-01 18:44:50 -0400 | [diff] [blame] | 1350 | |
Luis R. Rodriguez | abc7381 | 2009-07-30 17:38:08 -0700 | [diff] [blame] | 1351 | mutex_lock(®_mutex); |
Luis R. Rodriguez | 1fa25e4 | 2009-01-22 15:05:44 -0800 | [diff] [blame] | 1352 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) { |
Luis R. Rodriguez | bbcf3f0 | 2009-05-19 17:49:47 -0400 | [diff] [blame] | 1353 | if (!wiphy->bands[band]) |
| 1354 | continue; |
| 1355 | handle_band_custom(wiphy, band, regd); |
| 1356 | bands_set++; |
Luis R. Rodriguez | 1fa25e4 | 2009-01-22 15:05:44 -0800 | [diff] [blame] | 1357 | } |
Luis R. Rodriguez | abc7381 | 2009-07-30 17:38:08 -0700 | [diff] [blame] | 1358 | mutex_unlock(®_mutex); |
Luis R. Rodriguez | bbcf3f0 | 2009-05-19 17:49:47 -0400 | [diff] [blame] | 1359 | |
| 1360 | /* |
| 1361 | * no point in calling this if it won't have any effect |
| 1362 | * on your device's supportd bands. |
| 1363 | */ |
| 1364 | WARN_ON(!bands_set); |
Luis R. Rodriguez | 1fa25e4 | 2009-01-22 15:05:44 -0800 | [diff] [blame] | 1365 | } |
| 1366 | EXPORT_SYMBOL(wiphy_apply_custom_regulatory); |
| 1367 | |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 1368 | /* |
| 1369 | * Return value which can be used by ignore_request() to indicate |
| 1370 | * it has been determined we should intersect two regulatory domains |
| 1371 | */ |
Luis R. Rodriguez | 9c96477 | 2008-10-30 13:33:53 -0700 | [diff] [blame] | 1372 | #define REG_INTERSECT 1 |
| 1373 | |
Johannes Berg | 84fa4f4 | 2008-10-24 20:32:23 +0200 | [diff] [blame] | 1374 | /* This has the logic which determines when a new request |
| 1375 | * should be ignored. */ |
Luis R. Rodriguez | 2f92cd2 | 2009-02-21 00:24:16 -0500 | [diff] [blame] | 1376 | static int ignore_request(struct wiphy *wiphy, |
| 1377 | struct regulatory_request *pending_request) |
Johannes Berg | 84fa4f4 | 2008-10-24 20:32:23 +0200 | [diff] [blame] | 1378 | { |
Luis R. Rodriguez | 806a9e3 | 2009-02-21 00:04:26 -0500 | [diff] [blame] | 1379 | struct wiphy *last_wiphy = NULL; |
Luis R. Rodriguez | 761cf7e | 2009-02-21 00:04:25 -0500 | [diff] [blame] | 1380 | |
| 1381 | assert_cfg80211_lock(); |
| 1382 | |
Johannes Berg | 84fa4f4 | 2008-10-24 20:32:23 +0200 | [diff] [blame] | 1383 | /* All initial requests are respected */ |
| 1384 | if (!last_request) |
| 1385 | return 0; |
| 1386 | |
Luis R. Rodriguez | 2f92cd2 | 2009-02-21 00:24:16 -0500 | [diff] [blame] | 1387 | switch (pending_request->initiator) { |
Luis R. Rodriguez | 7db90f4 | 2009-03-09 22:07:41 -0400 | [diff] [blame] | 1388 | case NL80211_REGDOM_SET_BY_CORE: |
Luis R. Rodriguez | 09d989d | 2010-01-29 19:58:57 -0500 | [diff] [blame] | 1389 | return 0; |
Luis R. Rodriguez | 7db90f4 | 2009-03-09 22:07:41 -0400 | [diff] [blame] | 1390 | case NL80211_REGDOM_SET_BY_COUNTRY_IE: |
Luis R. Rodriguez | 806a9e3 | 2009-02-21 00:04:26 -0500 | [diff] [blame] | 1391 | |
Luis R. Rodriguez | 57b5ce0 | 2012-07-12 11:49:18 -0700 | [diff] [blame] | 1392 | if (reg_request_cell_base(last_request)) { |
| 1393 | /* Trust a Cell base station over the AP's country IE */ |
| 1394 | if (regdom_changes(pending_request->alpha2)) |
| 1395 | return -EOPNOTSUPP; |
| 1396 | return -EALREADY; |
| 1397 | } |
| 1398 | |
Luis R. Rodriguez | 806a9e3 | 2009-02-21 00:04:26 -0500 | [diff] [blame] | 1399 | last_wiphy = wiphy_idx_to_wiphy(last_request->wiphy_idx); |
| 1400 | |
Luis R. Rodriguez | 2f92cd2 | 2009-02-21 00:24:16 -0500 | [diff] [blame] | 1401 | if (unlikely(!is_an_alpha2(pending_request->alpha2))) |
Johannes Berg | 84fa4f4 | 2008-10-24 20:32:23 +0200 | [diff] [blame] | 1402 | return -EINVAL; |
Luis R. Rodriguez | 7db90f4 | 2009-03-09 22:07:41 -0400 | [diff] [blame] | 1403 | if (last_request->initiator == |
| 1404 | NL80211_REGDOM_SET_BY_COUNTRY_IE) { |
Luis R. Rodriguez | 806a9e3 | 2009-02-21 00:04:26 -0500 | [diff] [blame] | 1405 | if (last_wiphy != wiphy) { |
Johannes Berg | 84fa4f4 | 2008-10-24 20:32:23 +0200 | [diff] [blame] | 1406 | /* |
| 1407 | * Two cards with two APs claiming different |
Thadeu Lima de Souza Cascardo | 1fe90b0 | 2009-08-11 11:18:42 -0300 | [diff] [blame] | 1408 | * Country IE alpha2s. We could |
Johannes Berg | 84fa4f4 | 2008-10-24 20:32:23 +0200 | [diff] [blame] | 1409 | * intersect them, but that seems unlikely |
| 1410 | * to be correct. Reject second one for now. |
| 1411 | */ |
Luis R. Rodriguez | 2f92cd2 | 2009-02-21 00:24:16 -0500 | [diff] [blame] | 1412 | if (regdom_changes(pending_request->alpha2)) |
Johannes Berg | 84fa4f4 | 2008-10-24 20:32:23 +0200 | [diff] [blame] | 1413 | return -EOPNOTSUPP; |
| 1414 | return -EALREADY; |
| 1415 | } |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 1416 | /* |
| 1417 | * Two consecutive Country IE hints on the same wiphy. |
| 1418 | * This should be picked up early by the driver/stack |
| 1419 | */ |
Luis R. Rodriguez | 2f92cd2 | 2009-02-21 00:24:16 -0500 | [diff] [blame] | 1420 | if (WARN_ON(regdom_changes(pending_request->alpha2))) |
Johannes Berg | 84fa4f4 | 2008-10-24 20:32:23 +0200 | [diff] [blame] | 1421 | return 0; |
| 1422 | return -EALREADY; |
| 1423 | } |
Luis R. Rodriguez | a171fba | 2010-10-18 17:44:51 -0700 | [diff] [blame] | 1424 | return 0; |
Luis R. Rodriguez | 7db90f4 | 2009-03-09 22:07:41 -0400 | [diff] [blame] | 1425 | case NL80211_REGDOM_SET_BY_DRIVER: |
| 1426 | if (last_request->initiator == NL80211_REGDOM_SET_BY_CORE) { |
Luis R. Rodriguez | 2f92cd2 | 2009-02-21 00:24:16 -0500 | [diff] [blame] | 1427 | if (regdom_changes(pending_request->alpha2)) |
Luis R. Rodriguez | e74b1e7 | 2009-01-22 15:05:48 -0800 | [diff] [blame] | 1428 | return 0; |
Johannes Berg | 84fa4f4 | 2008-10-24 20:32:23 +0200 | [diff] [blame] | 1429 | return -EALREADY; |
Luis R. Rodriguez | e74b1e7 | 2009-01-22 15:05:48 -0800 | [diff] [blame] | 1430 | } |
Luis R. Rodriguez | fff32c0 | 2009-02-21 00:04:32 -0500 | [diff] [blame] | 1431 | |
| 1432 | /* |
| 1433 | * This would happen if you unplug and plug your card |
| 1434 | * back in or if you add a new device for which the previously |
| 1435 | * loaded card also agrees on the regulatory domain. |
| 1436 | */ |
Luis R. Rodriguez | 7db90f4 | 2009-03-09 22:07:41 -0400 | [diff] [blame] | 1437 | if (last_request->initiator == NL80211_REGDOM_SET_BY_DRIVER && |
Luis R. Rodriguez | 2f92cd2 | 2009-02-21 00:24:16 -0500 | [diff] [blame] | 1438 | !regdom_changes(pending_request->alpha2)) |
Luis R. Rodriguez | fff32c0 | 2009-02-21 00:04:32 -0500 | [diff] [blame] | 1439 | return -EALREADY; |
| 1440 | |
Luis R. Rodriguez | 3e0c3ff | 2009-01-07 17:43:34 -0800 | [diff] [blame] | 1441 | return REG_INTERSECT; |
Luis R. Rodriguez | 7db90f4 | 2009-03-09 22:07:41 -0400 | [diff] [blame] | 1442 | case NL80211_REGDOM_SET_BY_USER: |
Luis R. Rodriguez | 57b5ce0 | 2012-07-12 11:49:18 -0700 | [diff] [blame] | 1443 | if (reg_request_cell_base(pending_request)) |
| 1444 | return reg_ignore_cell_hint(pending_request); |
| 1445 | |
| 1446 | if (reg_request_cell_base(last_request)) |
| 1447 | return -EOPNOTSUPP; |
| 1448 | |
Luis R. Rodriguez | 7db90f4 | 2009-03-09 22:07:41 -0400 | [diff] [blame] | 1449 | if (last_request->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) |
Luis R. Rodriguez | 9c96477 | 2008-10-30 13:33:53 -0700 | [diff] [blame] | 1450 | return REG_INTERSECT; |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 1451 | /* |
| 1452 | * If the user knows better the user should set the regdom |
| 1453 | * to their country before the IE is picked up |
| 1454 | */ |
Luis R. Rodriguez | 7db90f4 | 2009-03-09 22:07:41 -0400 | [diff] [blame] | 1455 | if (last_request->initiator == NL80211_REGDOM_SET_BY_USER && |
Luis R. Rodriguez | 3f2355c | 2008-11-12 14:22:02 -0800 | [diff] [blame] | 1456 | last_request->intersect) |
| 1457 | return -EOPNOTSUPP; |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 1458 | /* |
| 1459 | * Process user requests only after previous user/driver/core |
| 1460 | * requests have been processed |
| 1461 | */ |
Luis R. Rodriguez | 7db90f4 | 2009-03-09 22:07:41 -0400 | [diff] [blame] | 1462 | if (last_request->initiator == NL80211_REGDOM_SET_BY_CORE || |
| 1463 | last_request->initiator == NL80211_REGDOM_SET_BY_DRIVER || |
| 1464 | last_request->initiator == NL80211_REGDOM_SET_BY_USER) { |
Luis R. Rodriguez | 69b1572 | 2009-02-21 00:04:33 -0500 | [diff] [blame] | 1465 | if (regdom_changes(last_request->alpha2)) |
Luis R. Rodriguez | 5eebade | 2009-01-22 15:05:47 -0800 | [diff] [blame] | 1466 | return -EAGAIN; |
| 1467 | } |
| 1468 | |
John W. Linville | baeb66f | 2009-12-18 17:59:02 -0500 | [diff] [blame] | 1469 | if (!regdom_changes(pending_request->alpha2)) |
Luis R. Rodriguez | e74b1e7 | 2009-01-22 15:05:48 -0800 | [diff] [blame] | 1470 | return -EALREADY; |
| 1471 | |
Johannes Berg | 84fa4f4 | 2008-10-24 20:32:23 +0200 | [diff] [blame] | 1472 | return 0; |
| 1473 | } |
| 1474 | |
| 1475 | return -EINVAL; |
| 1476 | } |
| 1477 | |
Luis R. Rodriguez | b2e253c | 2010-11-17 21:46:09 -0800 | [diff] [blame] | 1478 | static void reg_set_request_processed(void) |
| 1479 | { |
| 1480 | bool need_more_processing = false; |
| 1481 | |
| 1482 | last_request->processed = true; |
| 1483 | |
| 1484 | spin_lock(®_requests_lock); |
| 1485 | if (!list_empty(®_requests_list)) |
| 1486 | need_more_processing = true; |
| 1487 | spin_unlock(®_requests_lock); |
| 1488 | |
Luis R. Rodriguez | a90c7a3 | 2011-04-05 10:49:04 -0700 | [diff] [blame] | 1489 | if (last_request->initiator == NL80211_REGDOM_SET_BY_USER) |
Eliad Peller | fe20b39 | 2012-06-12 12:53:13 +0300 | [diff] [blame] | 1490 | cancel_delayed_work(®_timeout); |
Luis R. Rodriguez | a90c7a3 | 2011-04-05 10:49:04 -0700 | [diff] [blame] | 1491 | |
Luis R. Rodriguez | b2e253c | 2010-11-17 21:46:09 -0800 | [diff] [blame] | 1492 | if (need_more_processing) |
| 1493 | schedule_work(®_work); |
| 1494 | } |
| 1495 | |
Luis R. Rodriguez | d1c96a9 | 2009-02-21 00:24:13 -0500 | [diff] [blame] | 1496 | /** |
| 1497 | * __regulatory_hint - hint to the wireless core a regulatory domain |
| 1498 | * @wiphy: if the hint comes from country information from an AP, this |
| 1499 | * 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] | 1500 | * @pending_request: the regulatory request currently being processed |
Luis R. Rodriguez | d1c96a9 | 2009-02-21 00:24:13 -0500 | [diff] [blame] | 1501 | * |
| 1502 | * 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] | 1503 | * what it believes should be the current regulatory domain. |
Luis R. Rodriguez | d1c96a9 | 2009-02-21 00:24:13 -0500 | [diff] [blame] | 1504 | * |
| 1505 | * Returns zero if all went fine, %-EALREADY if a regulatory domain had |
| 1506 | * already been set or other standard error codes. |
| 1507 | * |
Luis R. Rodriguez | abc7381 | 2009-07-30 17:38:08 -0700 | [diff] [blame] | 1508 | * Caller must hold &cfg80211_mutex and ®_mutex |
Luis R. Rodriguez | d1c96a9 | 2009-02-21 00:24:13 -0500 | [diff] [blame] | 1509 | */ |
Luis R. Rodriguez | 28da32d | 2009-02-21 00:24:14 -0500 | [diff] [blame] | 1510 | static int __regulatory_hint(struct wiphy *wiphy, |
| 1511 | struct regulatory_request *pending_request) |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 1512 | { |
Luis R. Rodriguez | 9c96477 | 2008-10-30 13:33:53 -0700 | [diff] [blame] | 1513 | bool intersect = false; |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 1514 | int r = 0; |
| 1515 | |
Luis R. Rodriguez | 761cf7e | 2009-02-21 00:04:25 -0500 | [diff] [blame] | 1516 | assert_cfg80211_lock(); |
| 1517 | |
Luis R. Rodriguez | 2f92cd2 | 2009-02-21 00:24:16 -0500 | [diff] [blame] | 1518 | r = ignore_request(wiphy, pending_request); |
Luis R. Rodriguez | 9c96477 | 2008-10-30 13:33:53 -0700 | [diff] [blame] | 1519 | |
Luis R. Rodriguez | 3e0c3ff | 2009-01-07 17:43:34 -0800 | [diff] [blame] | 1520 | if (r == REG_INTERSECT) { |
Luis R. Rodriguez | 7db90f4 | 2009-03-09 22:07:41 -0400 | [diff] [blame] | 1521 | if (pending_request->initiator == |
| 1522 | NL80211_REGDOM_SET_BY_DRIVER) { |
Luis R. Rodriguez | 3e0c3ff | 2009-01-07 17:43:34 -0800 | [diff] [blame] | 1523 | r = reg_copy_regd(&wiphy->regd, cfg80211_regdomain); |
Luis R. Rodriguez | d951c1d | 2009-02-21 00:24:15 -0500 | [diff] [blame] | 1524 | if (r) { |
| 1525 | kfree(pending_request); |
Luis R. Rodriguez | 3e0c3ff | 2009-01-07 17:43:34 -0800 | [diff] [blame] | 1526 | return r; |
Luis R. Rodriguez | d951c1d | 2009-02-21 00:24:15 -0500 | [diff] [blame] | 1527 | } |
Luis R. Rodriguez | 3e0c3ff | 2009-01-07 17:43:34 -0800 | [diff] [blame] | 1528 | } |
Luis R. Rodriguez | 9c96477 | 2008-10-30 13:33:53 -0700 | [diff] [blame] | 1529 | intersect = true; |
Luis R. Rodriguez | 3e0c3ff | 2009-01-07 17:43:34 -0800 | [diff] [blame] | 1530 | } else if (r) { |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 1531 | /* |
| 1532 | * If the regulatory domain being requested by the |
Luis R. Rodriguez | 3e0c3ff | 2009-01-07 17:43:34 -0800 | [diff] [blame] | 1533 | * driver has already been set just copy it to the |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 1534 | * wiphy |
| 1535 | */ |
Luis R. Rodriguez | 28da32d | 2009-02-21 00:24:14 -0500 | [diff] [blame] | 1536 | if (r == -EALREADY && |
Luis R. Rodriguez | 7db90f4 | 2009-03-09 22:07:41 -0400 | [diff] [blame] | 1537 | pending_request->initiator == |
| 1538 | NL80211_REGDOM_SET_BY_DRIVER) { |
Luis R. Rodriguez | 3e0c3ff | 2009-01-07 17:43:34 -0800 | [diff] [blame] | 1539 | r = reg_copy_regd(&wiphy->regd, cfg80211_regdomain); |
Luis R. Rodriguez | d951c1d | 2009-02-21 00:24:15 -0500 | [diff] [blame] | 1540 | if (r) { |
| 1541 | kfree(pending_request); |
Luis R. Rodriguez | 3e0c3ff | 2009-01-07 17:43:34 -0800 | [diff] [blame] | 1542 | return r; |
Luis R. Rodriguez | d951c1d | 2009-02-21 00:24:15 -0500 | [diff] [blame] | 1543 | } |
Luis R. Rodriguez | 3e0c3ff | 2009-01-07 17:43:34 -0800 | [diff] [blame] | 1544 | r = -EALREADY; |
| 1545 | goto new_request; |
| 1546 | } |
Luis R. Rodriguez | d951c1d | 2009-02-21 00:24:15 -0500 | [diff] [blame] | 1547 | kfree(pending_request); |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 1548 | return r; |
Luis R. Rodriguez | 3e0c3ff | 2009-01-07 17:43:34 -0800 | [diff] [blame] | 1549 | } |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 1550 | |
Luis R. Rodriguez | 3e0c3ff | 2009-01-07 17:43:34 -0800 | [diff] [blame] | 1551 | new_request: |
Luis R. Rodriguez | a042994 | 2011-11-28 16:47:15 -0500 | [diff] [blame] | 1552 | if (last_request != &core_request_world) |
| 1553 | kfree(last_request); |
Luis R. Rodriguez | d951c1d | 2009-02-21 00:24:15 -0500 | [diff] [blame] | 1554 | |
| 1555 | last_request = pending_request; |
| 1556 | last_request->intersect = intersect; |
| 1557 | |
| 1558 | pending_request = NULL; |
Luis R. Rodriguez | 3e0c3ff | 2009-01-07 17:43:34 -0800 | [diff] [blame] | 1559 | |
Luis R. Rodriguez | 09d989d | 2010-01-29 19:58:57 -0500 | [diff] [blame] | 1560 | if (last_request->initiator == NL80211_REGDOM_SET_BY_USER) { |
| 1561 | user_alpha2[0] = last_request->alpha2[0]; |
| 1562 | user_alpha2[1] = last_request->alpha2[1]; |
| 1563 | } |
| 1564 | |
Luis R. Rodriguez | 3e0c3ff | 2009-01-07 17:43:34 -0800 | [diff] [blame] | 1565 | /* When r == REG_INTERSECT we do need to call CRDA */ |
Luis R. Rodriguez | 73d54c9 | 2009-03-09 22:07:42 -0400 | [diff] [blame] | 1566 | if (r < 0) { |
| 1567 | /* |
| 1568 | * Since CRDA will not be called in this case as we already |
| 1569 | * have applied the requested regulatory domain before we just |
| 1570 | * inform userspace we have processed the request |
| 1571 | */ |
Luis R. Rodriguez | b2e253c | 2010-11-17 21:46:09 -0800 | [diff] [blame] | 1572 | if (r == -EALREADY) { |
Luis R. Rodriguez | 73d54c9 | 2009-03-09 22:07:42 -0400 | [diff] [blame] | 1573 | nl80211_send_reg_change_event(last_request); |
Luis R. Rodriguez | b2e253c | 2010-11-17 21:46:09 -0800 | [diff] [blame] | 1574 | reg_set_request_processed(); |
| 1575 | } |
Luis R. Rodriguez | 3e0c3ff | 2009-01-07 17:43:34 -0800 | [diff] [blame] | 1576 | return r; |
Luis R. Rodriguez | 73d54c9 | 2009-03-09 22:07:42 -0400 | [diff] [blame] | 1577 | } |
Luis R. Rodriguez | 3e0c3ff | 2009-01-07 17:43:34 -0800 | [diff] [blame] | 1578 | |
Luis R. Rodriguez | d951c1d | 2009-02-21 00:24:15 -0500 | [diff] [blame] | 1579 | return call_crda(last_request->alpha2); |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 1580 | } |
| 1581 | |
Luis R. Rodriguez | 30a548c | 2009-05-02 01:17:27 -0400 | [diff] [blame] | 1582 | /* This processes *all* regulatory hints */ |
Luis R. Rodriguez | 8848bef | 2011-12-20 12:23:36 -0800 | [diff] [blame] | 1583 | static void reg_process_hint(struct regulatory_request *reg_request, |
| 1584 | enum nl80211_reg_initiator reg_initiator) |
Luis R. Rodriguez | fe33eb3 | 2009-02-21 00:04:30 -0500 | [diff] [blame] | 1585 | { |
| 1586 | int r = 0; |
| 1587 | struct wiphy *wiphy = NULL; |
| 1588 | |
| 1589 | BUG_ON(!reg_request->alpha2); |
| 1590 | |
Luis R. Rodriguez | fe33eb3 | 2009-02-21 00:04:30 -0500 | [diff] [blame] | 1591 | if (wiphy_idx_valid(reg_request->wiphy_idx)) |
| 1592 | wiphy = wiphy_idx_to_wiphy(reg_request->wiphy_idx); |
| 1593 | |
Luis R. Rodriguez | 8848bef | 2011-12-20 12:23:36 -0800 | [diff] [blame] | 1594 | if (reg_initiator == NL80211_REGDOM_SET_BY_DRIVER && |
Luis R. Rodriguez | fe33eb3 | 2009-02-21 00:04:30 -0500 | [diff] [blame] | 1595 | !wiphy) { |
Luis R. Rodriguez | d951c1d | 2009-02-21 00:24:15 -0500 | [diff] [blame] | 1596 | kfree(reg_request); |
Luis R. Rodriguez | b0e2880 | 2010-11-17 21:46:08 -0800 | [diff] [blame] | 1597 | return; |
Luis R. Rodriguez | fe33eb3 | 2009-02-21 00:04:30 -0500 | [diff] [blame] | 1598 | } |
| 1599 | |
Luis R. Rodriguez | 28da32d | 2009-02-21 00:24:14 -0500 | [diff] [blame] | 1600 | r = __regulatory_hint(wiphy, reg_request); |
Luis R. Rodriguez | fe33eb3 | 2009-02-21 00:04:30 -0500 | [diff] [blame] | 1601 | /* This is required so that the orig_* parameters are saved */ |
Johannes Berg | 5be83de | 2009-11-19 00:56:28 +0100 | [diff] [blame] | 1602 | if (r == -EALREADY && wiphy && |
Luis R. Rodriguez | a90c7a3 | 2011-04-05 10:49:04 -0700 | [diff] [blame] | 1603 | wiphy->flags & WIPHY_FLAG_STRICT_REGULATORY) { |
Luis R. Rodriguez | 8848bef | 2011-12-20 12:23:36 -0800 | [diff] [blame] | 1604 | wiphy_update_regulatory(wiphy, reg_initiator); |
Luis R. Rodriguez | a90c7a3 | 2011-04-05 10:49:04 -0700 | [diff] [blame] | 1605 | return; |
| 1606 | } |
| 1607 | |
| 1608 | /* |
| 1609 | * We only time out user hints, given that they should be the only |
| 1610 | * source of bogus requests. |
| 1611 | */ |
Luis R. Rodriguez | c989bb1 | 2011-04-25 18:35:48 -0700 | [diff] [blame] | 1612 | if (r != -EALREADY && |
Luis R. Rodriguez | 8848bef | 2011-12-20 12:23:36 -0800 | [diff] [blame] | 1613 | reg_initiator == NL80211_REGDOM_SET_BY_USER) |
Luis R. Rodriguez | a90c7a3 | 2011-04-05 10:49:04 -0700 | [diff] [blame] | 1614 | schedule_delayed_work(®_timeout, msecs_to_jiffies(3142)); |
Luis R. Rodriguez | fe33eb3 | 2009-02-21 00:04:30 -0500 | [diff] [blame] | 1615 | } |
| 1616 | |
Luis R. Rodriguez | b2e253c | 2010-11-17 21:46:09 -0800 | [diff] [blame] | 1617 | /* |
| 1618 | * Processes regulatory hints, this is all the NL80211_REGDOM_SET_BY_* |
| 1619 | * Regulatory hints come on a first come first serve basis and we |
| 1620 | * must process each one atomically. |
| 1621 | */ |
Luis R. Rodriguez | fe33eb3 | 2009-02-21 00:04:30 -0500 | [diff] [blame] | 1622 | static void reg_process_pending_hints(void) |
Luis R. Rodriguez | b0e2880 | 2010-11-17 21:46:08 -0800 | [diff] [blame] | 1623 | { |
Luis R. Rodriguez | fe33eb3 | 2009-02-21 00:04:30 -0500 | [diff] [blame] | 1624 | struct regulatory_request *reg_request; |
Luis R. Rodriguez | fe33eb3 | 2009-02-21 00:04:30 -0500 | [diff] [blame] | 1625 | |
Luis R. Rodriguez | b0e2880 | 2010-11-17 21:46:08 -0800 | [diff] [blame] | 1626 | mutex_lock(&cfg80211_mutex); |
| 1627 | mutex_lock(®_mutex); |
| 1628 | |
Luis R. Rodriguez | b2e253c | 2010-11-17 21:46:09 -0800 | [diff] [blame] | 1629 | /* When last_request->processed becomes true this will be rescheduled */ |
| 1630 | if (last_request && !last_request->processed) { |
| 1631 | REG_DBG_PRINT("Pending regulatory request, waiting " |
Joe Perches | 12c5ffb | 2011-07-29 14:51:25 -0700 | [diff] [blame] | 1632 | "for it to be processed...\n"); |
Luis R. Rodriguez | b2e253c | 2010-11-17 21:46:09 -0800 | [diff] [blame] | 1633 | goto out; |
Luis R. Rodriguez | fe33eb3 | 2009-02-21 00:04:30 -0500 | [diff] [blame] | 1634 | } |
Luis R. Rodriguez | b2e253c | 2010-11-17 21:46:09 -0800 | [diff] [blame] | 1635 | |
| 1636 | spin_lock(®_requests_lock); |
| 1637 | |
| 1638 | if (list_empty(®_requests_list)) { |
| 1639 | spin_unlock(®_requests_lock); |
| 1640 | goto out; |
| 1641 | } |
| 1642 | |
| 1643 | reg_request = list_first_entry(®_requests_list, |
| 1644 | struct regulatory_request, |
| 1645 | list); |
| 1646 | list_del_init(®_request->list); |
| 1647 | |
Luis R. Rodriguez | fe33eb3 | 2009-02-21 00:04:30 -0500 | [diff] [blame] | 1648 | spin_unlock(®_requests_lock); |
Luis R. Rodriguez | b0e2880 | 2010-11-17 21:46:08 -0800 | [diff] [blame] | 1649 | |
Luis R. Rodriguez | 8848bef | 2011-12-20 12:23:36 -0800 | [diff] [blame] | 1650 | reg_process_hint(reg_request, reg_request->initiator); |
Luis R. Rodriguez | b2e253c | 2010-11-17 21:46:09 -0800 | [diff] [blame] | 1651 | |
| 1652 | out: |
Luis R. Rodriguez | b0e2880 | 2010-11-17 21:46:08 -0800 | [diff] [blame] | 1653 | mutex_unlock(®_mutex); |
| 1654 | mutex_unlock(&cfg80211_mutex); |
Luis R. Rodriguez | fe33eb3 | 2009-02-21 00:04:30 -0500 | [diff] [blame] | 1655 | } |
| 1656 | |
Luis R. Rodriguez | e38f8a7 | 2009-02-21 00:20:39 -0500 | [diff] [blame] | 1657 | /* Processes beacon hints -- this has nothing to do with country IEs */ |
| 1658 | static void reg_process_pending_beacon_hints(void) |
| 1659 | { |
Johannes Berg | 79c97e9 | 2009-07-07 03:56:12 +0200 | [diff] [blame] | 1660 | struct cfg80211_registered_device *rdev; |
Luis R. Rodriguez | e38f8a7 | 2009-02-21 00:20:39 -0500 | [diff] [blame] | 1661 | struct reg_beacon *pending_beacon, *tmp; |
| 1662 | |
Luis R. Rodriguez | abc7381 | 2009-07-30 17:38:08 -0700 | [diff] [blame] | 1663 | /* |
| 1664 | * No need to hold the reg_mutex here as we just touch wiphys |
| 1665 | * and do not read or access regulatory variables. |
| 1666 | */ |
Luis R. Rodriguez | e38f8a7 | 2009-02-21 00:20:39 -0500 | [diff] [blame] | 1667 | mutex_lock(&cfg80211_mutex); |
| 1668 | |
| 1669 | /* This goes through the _pending_ beacon list */ |
| 1670 | spin_lock_bh(®_pending_beacons_lock); |
| 1671 | |
| 1672 | if (list_empty(®_pending_beacons)) { |
| 1673 | spin_unlock_bh(®_pending_beacons_lock); |
| 1674 | goto out; |
| 1675 | } |
| 1676 | |
| 1677 | list_for_each_entry_safe(pending_beacon, tmp, |
| 1678 | ®_pending_beacons, list) { |
| 1679 | |
| 1680 | list_del_init(&pending_beacon->list); |
| 1681 | |
| 1682 | /* Applies the beacon hint to current wiphys */ |
Johannes Berg | 79c97e9 | 2009-07-07 03:56:12 +0200 | [diff] [blame] | 1683 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) |
| 1684 | wiphy_update_new_beacon(&rdev->wiphy, pending_beacon); |
Luis R. Rodriguez | e38f8a7 | 2009-02-21 00:20:39 -0500 | [diff] [blame] | 1685 | |
| 1686 | /* Remembers the beacon hint for new wiphys or reg changes */ |
| 1687 | list_add_tail(&pending_beacon->list, ®_beacon_list); |
| 1688 | } |
| 1689 | |
| 1690 | spin_unlock_bh(®_pending_beacons_lock); |
| 1691 | out: |
| 1692 | mutex_unlock(&cfg80211_mutex); |
| 1693 | } |
| 1694 | |
Luis R. Rodriguez | fe33eb3 | 2009-02-21 00:04:30 -0500 | [diff] [blame] | 1695 | static void reg_todo(struct work_struct *work) |
| 1696 | { |
| 1697 | reg_process_pending_hints(); |
Luis R. Rodriguez | e38f8a7 | 2009-02-21 00:20:39 -0500 | [diff] [blame] | 1698 | reg_process_pending_beacon_hints(); |
Luis R. Rodriguez | fe33eb3 | 2009-02-21 00:04:30 -0500 | [diff] [blame] | 1699 | } |
| 1700 | |
Luis R. Rodriguez | fe33eb3 | 2009-02-21 00:04:30 -0500 | [diff] [blame] | 1701 | static void queue_regulatory_request(struct regulatory_request *request) |
| 1702 | { |
John W. Linville | c61029c | 2010-08-05 14:26:24 -0400 | [diff] [blame] | 1703 | if (isalpha(request->alpha2[0])) |
| 1704 | request->alpha2[0] = toupper(request->alpha2[0]); |
| 1705 | if (isalpha(request->alpha2[1])) |
| 1706 | request->alpha2[1] = toupper(request->alpha2[1]); |
| 1707 | |
Luis R. Rodriguez | fe33eb3 | 2009-02-21 00:04:30 -0500 | [diff] [blame] | 1708 | spin_lock(®_requests_lock); |
| 1709 | list_add_tail(&request->list, ®_requests_list); |
| 1710 | spin_unlock(®_requests_lock); |
| 1711 | |
| 1712 | schedule_work(®_work); |
| 1713 | } |
| 1714 | |
Luis R. Rodriguez | 09d989d | 2010-01-29 19:58:57 -0500 | [diff] [blame] | 1715 | /* |
| 1716 | * Core regulatory hint -- happens during cfg80211_init() |
| 1717 | * and when we restore regulatory settings. |
| 1718 | */ |
Luis R. Rodriguez | ba25c14 | 2009-02-21 00:04:23 -0500 | [diff] [blame] | 1719 | static int regulatory_hint_core(const char *alpha2) |
| 1720 | { |
| 1721 | struct regulatory_request *request; |
| 1722 | |
Luis R. Rodriguez | ba25c14 | 2009-02-21 00:04:23 -0500 | [diff] [blame] | 1723 | request = kzalloc(sizeof(struct regulatory_request), |
| 1724 | GFP_KERNEL); |
| 1725 | if (!request) |
| 1726 | return -ENOMEM; |
| 1727 | |
| 1728 | request->alpha2[0] = alpha2[0]; |
| 1729 | request->alpha2[1] = alpha2[1]; |
Luis R. Rodriguez | 7db90f4 | 2009-03-09 22:07:41 -0400 | [diff] [blame] | 1730 | request->initiator = NL80211_REGDOM_SET_BY_CORE; |
Luis R. Rodriguez | ba25c14 | 2009-02-21 00:04:23 -0500 | [diff] [blame] | 1731 | |
Luis R. Rodriguez | 31e9972 | 2010-11-17 21:46:06 -0800 | [diff] [blame] | 1732 | queue_regulatory_request(request); |
Luis R. Rodriguez | 5078b2e | 2009-05-13 17:04:42 -0400 | [diff] [blame] | 1733 | |
Luis R. Rodriguez | fe33eb3 | 2009-02-21 00:04:30 -0500 | [diff] [blame] | 1734 | return 0; |
Luis R. Rodriguez | ba25c14 | 2009-02-21 00:04:23 -0500 | [diff] [blame] | 1735 | } |
| 1736 | |
Luis R. Rodriguez | fe33eb3 | 2009-02-21 00:04:30 -0500 | [diff] [blame] | 1737 | /* User hints */ |
Luis R. Rodriguez | 57b5ce0 | 2012-07-12 11:49:18 -0700 | [diff] [blame] | 1738 | int regulatory_hint_user(const char *alpha2, |
| 1739 | enum nl80211_user_reg_hint_type user_reg_hint_type) |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 1740 | { |
Luis R. Rodriguez | fe33eb3 | 2009-02-21 00:04:30 -0500 | [diff] [blame] | 1741 | struct regulatory_request *request; |
| 1742 | |
Johannes Berg | be3d481 | 2008-10-24 20:32:21 +0200 | [diff] [blame] | 1743 | BUG_ON(!alpha2); |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 1744 | |
Luis R. Rodriguez | fe33eb3 | 2009-02-21 00:04:30 -0500 | [diff] [blame] | 1745 | request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); |
| 1746 | if (!request) |
| 1747 | return -ENOMEM; |
| 1748 | |
| 1749 | request->wiphy_idx = WIPHY_IDX_STALE; |
| 1750 | request->alpha2[0] = alpha2[0]; |
| 1751 | request->alpha2[1] = alpha2[1]; |
Luis R. Rodriguez | e12822e | 2010-01-04 11:37:39 -0500 | [diff] [blame] | 1752 | request->initiator = NL80211_REGDOM_SET_BY_USER; |
Luis R. Rodriguez | 57b5ce0 | 2012-07-12 11:49:18 -0700 | [diff] [blame] | 1753 | request->user_reg_hint_type = user_reg_hint_type; |
Luis R. Rodriguez | fe33eb3 | 2009-02-21 00:04:30 -0500 | [diff] [blame] | 1754 | |
| 1755 | queue_regulatory_request(request); |
| 1756 | |
| 1757 | return 0; |
| 1758 | } |
| 1759 | |
| 1760 | /* Driver hints */ |
| 1761 | int regulatory_hint(struct wiphy *wiphy, const char *alpha2) |
| 1762 | { |
| 1763 | struct regulatory_request *request; |
| 1764 | |
| 1765 | BUG_ON(!alpha2); |
| 1766 | BUG_ON(!wiphy); |
| 1767 | |
| 1768 | request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); |
| 1769 | if (!request) |
| 1770 | return -ENOMEM; |
| 1771 | |
| 1772 | request->wiphy_idx = get_wiphy_idx(wiphy); |
| 1773 | |
| 1774 | /* Must have registered wiphy first */ |
| 1775 | BUG_ON(!wiphy_idx_valid(request->wiphy_idx)); |
| 1776 | |
| 1777 | request->alpha2[0] = alpha2[0]; |
| 1778 | request->alpha2[1] = alpha2[1]; |
Luis R. Rodriguez | 7db90f4 | 2009-03-09 22:07:41 -0400 | [diff] [blame] | 1779 | request->initiator = NL80211_REGDOM_SET_BY_DRIVER; |
Luis R. Rodriguez | fe33eb3 | 2009-02-21 00:04:30 -0500 | [diff] [blame] | 1780 | |
| 1781 | queue_regulatory_request(request); |
| 1782 | |
| 1783 | return 0; |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 1784 | } |
| 1785 | EXPORT_SYMBOL(regulatory_hint); |
| 1786 | |
Luis R. Rodriguez | 4b44c8b | 2009-07-30 17:38:07 -0700 | [diff] [blame] | 1787 | /* |
| 1788 | * We hold wdev_lock() here so we cannot hold cfg80211_mutex() and |
| 1789 | * therefore cannot iterate over the rdev list here. |
| 1790 | */ |
Luis R. Rodriguez | 3f2355c | 2008-11-12 14:22:02 -0800 | [diff] [blame] | 1791 | void regulatory_hint_11d(struct wiphy *wiphy, |
Luis R. Rodriguez | 84920e3 | 2010-01-14 20:08:20 -0500 | [diff] [blame] | 1792 | enum ieee80211_band band, |
| 1793 | u8 *country_ie, |
| 1794 | u8 country_ie_len) |
Luis R. Rodriguez | 3f2355c | 2008-11-12 14:22:02 -0800 | [diff] [blame] | 1795 | { |
Luis R. Rodriguez | 3f2355c | 2008-11-12 14:22:02 -0800 | [diff] [blame] | 1796 | char alpha2[2]; |
Luis R. Rodriguez | 3f2355c | 2008-11-12 14:22:02 -0800 | [diff] [blame] | 1797 | enum environment_cap env = ENVIRON_ANY; |
Luis R. Rodriguez | fe33eb3 | 2009-02-21 00:04:30 -0500 | [diff] [blame] | 1798 | struct regulatory_request *request; |
Luis R. Rodriguez | 3f2355c | 2008-11-12 14:22:02 -0800 | [diff] [blame] | 1799 | |
Luis R. Rodriguez | abc7381 | 2009-07-30 17:38:08 -0700 | [diff] [blame] | 1800 | mutex_lock(®_mutex); |
Luis R. Rodriguez | 3f2355c | 2008-11-12 14:22:02 -0800 | [diff] [blame] | 1801 | |
Luis R. Rodriguez | 9828b01 | 2009-07-30 17:38:06 -0700 | [diff] [blame] | 1802 | if (unlikely(!last_request)) |
| 1803 | goto out; |
Luis R. Rodriguez | d335fe6 | 2009-02-21 00:04:27 -0500 | [diff] [blame] | 1804 | |
Luis R. Rodriguez | 3f2355c | 2008-11-12 14:22:02 -0800 | [diff] [blame] | 1805 | /* IE len must be evenly divisible by 2 */ |
| 1806 | if (country_ie_len & 0x01) |
| 1807 | goto out; |
| 1808 | |
| 1809 | if (country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN) |
| 1810 | goto out; |
| 1811 | |
Luis R. Rodriguez | 3f2355c | 2008-11-12 14:22:02 -0800 | [diff] [blame] | 1812 | alpha2[0] = country_ie[0]; |
| 1813 | alpha2[1] = country_ie[1]; |
| 1814 | |
| 1815 | if (country_ie[2] == 'I') |
| 1816 | env = ENVIRON_INDOOR; |
| 1817 | else if (country_ie[2] == 'O') |
| 1818 | env = ENVIRON_OUTDOOR; |
| 1819 | |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 1820 | /* |
Luis R. Rodriguez | 8b19e6c | 2009-07-30 17:38:09 -0700 | [diff] [blame] | 1821 | * We will run this only upon a successful connection on cfg80211. |
Luis R. Rodriguez | 4b44c8b | 2009-07-30 17:38:07 -0700 | [diff] [blame] | 1822 | * We leave conflict resolution to the workqueue, where can hold |
| 1823 | * cfg80211_mutex. |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 1824 | */ |
Luis R. Rodriguez | cc0b6fe | 2009-03-20 23:53:05 -0400 | [diff] [blame] | 1825 | if (likely(last_request->initiator == |
| 1826 | NL80211_REGDOM_SET_BY_COUNTRY_IE && |
Luis R. Rodriguez | 4b44c8b | 2009-07-30 17:38:07 -0700 | [diff] [blame] | 1827 | wiphy_idx_valid(last_request->wiphy_idx))) |
| 1828 | goto out; |
Luis R. Rodriguez | 3f2355c | 2008-11-12 14:22:02 -0800 | [diff] [blame] | 1829 | |
Luis R. Rodriguez | fe33eb3 | 2009-02-21 00:04:30 -0500 | [diff] [blame] | 1830 | request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); |
| 1831 | if (!request) |
Dan Carpenter | f9f9b6e | 2010-07-22 13:26:50 +0200 | [diff] [blame] | 1832 | goto out; |
Luis R. Rodriguez | fe33eb3 | 2009-02-21 00:04:30 -0500 | [diff] [blame] | 1833 | |
Luis R. Rodriguez | fe33eb3 | 2009-02-21 00:04:30 -0500 | [diff] [blame] | 1834 | request->wiphy_idx = get_wiphy_idx(wiphy); |
John W. Linville | 4f366c5 | 2010-07-15 14:57:33 -0400 | [diff] [blame] | 1835 | request->alpha2[0] = alpha2[0]; |
| 1836 | request->alpha2[1] = alpha2[1]; |
Luis R. Rodriguez | 7db90f4 | 2009-03-09 22:07:41 -0400 | [diff] [blame] | 1837 | request->initiator = NL80211_REGDOM_SET_BY_COUNTRY_IE; |
Luis R. Rodriguez | fe33eb3 | 2009-02-21 00:04:30 -0500 | [diff] [blame] | 1838 | request->country_ie_env = env; |
Luis R. Rodriguez | 3f2355c | 2008-11-12 14:22:02 -0800 | [diff] [blame] | 1839 | |
Luis R. Rodriguez | abc7381 | 2009-07-30 17:38:08 -0700 | [diff] [blame] | 1840 | mutex_unlock(®_mutex); |
Luis R. Rodriguez | fe33eb3 | 2009-02-21 00:04:30 -0500 | [diff] [blame] | 1841 | |
| 1842 | queue_regulatory_request(request); |
| 1843 | |
| 1844 | return; |
Luis R. Rodriguez | 0441d6f | 2009-02-21 00:04:29 -0500 | [diff] [blame] | 1845 | |
Luis R. Rodriguez | 3f2355c | 2008-11-12 14:22:02 -0800 | [diff] [blame] | 1846 | out: |
Luis R. Rodriguez | abc7381 | 2009-07-30 17:38:08 -0700 | [diff] [blame] | 1847 | mutex_unlock(®_mutex); |
Luis R. Rodriguez | 3f2355c | 2008-11-12 14:22:02 -0800 | [diff] [blame] | 1848 | } |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 1849 | |
Luis R. Rodriguez | 09d989d | 2010-01-29 19:58:57 -0500 | [diff] [blame] | 1850 | static void restore_alpha2(char *alpha2, bool reset_user) |
| 1851 | { |
| 1852 | /* indicates there is no alpha2 to consider for restoration */ |
| 1853 | alpha2[0] = '9'; |
| 1854 | alpha2[1] = '7'; |
| 1855 | |
| 1856 | /* The user setting has precedence over the module parameter */ |
| 1857 | if (is_user_regdom_saved()) { |
| 1858 | /* Unless we're asked to ignore it and reset it */ |
| 1859 | if (reset_user) { |
Luis R. Rodriguez | d91e41b | 2010-10-20 10:18:59 -0700 | [diff] [blame] | 1860 | REG_DBG_PRINT("Restoring regulatory settings " |
Luis R. Rodriguez | 09d989d | 2010-01-29 19:58:57 -0500 | [diff] [blame] | 1861 | "including user preference\n"); |
| 1862 | user_alpha2[0] = '9'; |
| 1863 | user_alpha2[1] = '7'; |
| 1864 | |
| 1865 | /* |
| 1866 | * If we're ignoring user settings, we still need to |
| 1867 | * check the module parameter to ensure we put things |
| 1868 | * back as they were for a full restore. |
| 1869 | */ |
| 1870 | if (!is_world_regdom(ieee80211_regdom)) { |
Luis R. Rodriguez | d91e41b | 2010-10-20 10:18:59 -0700 | [diff] [blame] | 1871 | REG_DBG_PRINT("Keeping preference on " |
Luis R. Rodriguez | 09d989d | 2010-01-29 19:58:57 -0500 | [diff] [blame] | 1872 | "module parameter ieee80211_regdom: %c%c\n", |
| 1873 | ieee80211_regdom[0], |
| 1874 | ieee80211_regdom[1]); |
| 1875 | alpha2[0] = ieee80211_regdom[0]; |
| 1876 | alpha2[1] = ieee80211_regdom[1]; |
| 1877 | } |
| 1878 | } else { |
Luis R. Rodriguez | d91e41b | 2010-10-20 10:18:59 -0700 | [diff] [blame] | 1879 | REG_DBG_PRINT("Restoring regulatory settings " |
Luis R. Rodriguez | 09d989d | 2010-01-29 19:58:57 -0500 | [diff] [blame] | 1880 | "while preserving user preference for: %c%c\n", |
| 1881 | user_alpha2[0], |
| 1882 | user_alpha2[1]); |
| 1883 | alpha2[0] = user_alpha2[0]; |
| 1884 | alpha2[1] = user_alpha2[1]; |
| 1885 | } |
| 1886 | } else if (!is_world_regdom(ieee80211_regdom)) { |
Luis R. Rodriguez | d91e41b | 2010-10-20 10:18:59 -0700 | [diff] [blame] | 1887 | REG_DBG_PRINT("Keeping preference on " |
Luis R. Rodriguez | 09d989d | 2010-01-29 19:58:57 -0500 | [diff] [blame] | 1888 | "module parameter ieee80211_regdom: %c%c\n", |
| 1889 | ieee80211_regdom[0], |
| 1890 | ieee80211_regdom[1]); |
| 1891 | alpha2[0] = ieee80211_regdom[0]; |
| 1892 | alpha2[1] = ieee80211_regdom[1]; |
| 1893 | } else |
Luis R. Rodriguez | d91e41b | 2010-10-20 10:18:59 -0700 | [diff] [blame] | 1894 | REG_DBG_PRINT("Restoring regulatory settings\n"); |
Luis R. Rodriguez | 09d989d | 2010-01-29 19:58:57 -0500 | [diff] [blame] | 1895 | } |
| 1896 | |
Rajkumar Manoharan | 5ce543d | 2011-12-07 21:50:08 +0530 | [diff] [blame] | 1897 | static void restore_custom_reg_settings(struct wiphy *wiphy) |
| 1898 | { |
| 1899 | struct ieee80211_supported_band *sband; |
| 1900 | enum ieee80211_band band; |
| 1901 | struct ieee80211_channel *chan; |
| 1902 | int i; |
| 1903 | |
| 1904 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) { |
| 1905 | sband = wiphy->bands[band]; |
| 1906 | if (!sband) |
| 1907 | continue; |
| 1908 | for (i = 0; i < sband->n_channels; i++) { |
| 1909 | chan = &sband->channels[i]; |
| 1910 | chan->flags = chan->orig_flags; |
| 1911 | chan->max_antenna_gain = chan->orig_mag; |
| 1912 | chan->max_power = chan->orig_mpwr; |
Paul Stewart | 899852a | 2012-08-01 16:54:42 -0700 | [diff] [blame] | 1913 | chan->beacon_found = false; |
Rajkumar Manoharan | 5ce543d | 2011-12-07 21:50:08 +0530 | [diff] [blame] | 1914 | } |
| 1915 | } |
| 1916 | } |
| 1917 | |
Luis R. Rodriguez | 09d989d | 2010-01-29 19:58:57 -0500 | [diff] [blame] | 1918 | /* |
| 1919 | * Restoring regulatory settings involves ingoring any |
| 1920 | * possibly stale country IE information and user regulatory |
| 1921 | * settings if so desired, this includes any beacon hints |
| 1922 | * learned as we could have traveled outside to another country |
| 1923 | * after disconnection. To restore regulatory settings we do |
| 1924 | * exactly what we did at bootup: |
| 1925 | * |
| 1926 | * - send a core regulatory hint |
| 1927 | * - send a user regulatory hint if applicable |
| 1928 | * |
| 1929 | * Device drivers that send a regulatory hint for a specific country |
| 1930 | * keep their own regulatory domain on wiphy->regd so that does does |
| 1931 | * not need to be remembered. |
| 1932 | */ |
| 1933 | static void restore_regulatory_settings(bool reset_user) |
| 1934 | { |
| 1935 | char alpha2[2]; |
Dmitry Shmidt | cee0bec | 2011-12-19 12:32:21 -0800 | [diff] [blame] | 1936 | char world_alpha2[2]; |
Luis R. Rodriguez | 09d989d | 2010-01-29 19:58:57 -0500 | [diff] [blame] | 1937 | struct reg_beacon *reg_beacon, *btmp; |
Luis R. Rodriguez | 1460955 | 2011-04-05 10:49:03 -0700 | [diff] [blame] | 1938 | struct regulatory_request *reg_request, *tmp; |
| 1939 | LIST_HEAD(tmp_reg_req_list); |
Rajkumar Manoharan | 5ce543d | 2011-12-07 21:50:08 +0530 | [diff] [blame] | 1940 | struct cfg80211_registered_device *rdev; |
Luis R. Rodriguez | 09d989d | 2010-01-29 19:58:57 -0500 | [diff] [blame] | 1941 | |
| 1942 | mutex_lock(&cfg80211_mutex); |
| 1943 | mutex_lock(®_mutex); |
| 1944 | |
Luis R. Rodriguez | a042994 | 2011-11-28 16:47:15 -0500 | [diff] [blame] | 1945 | reset_regdomains(true); |
Luis R. Rodriguez | 09d989d | 2010-01-29 19:58:57 -0500 | [diff] [blame] | 1946 | restore_alpha2(alpha2, reset_user); |
| 1947 | |
Luis R. Rodriguez | 1460955 | 2011-04-05 10:49:03 -0700 | [diff] [blame] | 1948 | /* |
| 1949 | * If there's any pending requests we simply |
| 1950 | * stash them to a temporary pending queue and |
| 1951 | * add then after we've restored regulatory |
| 1952 | * settings. |
| 1953 | */ |
| 1954 | spin_lock(®_requests_lock); |
| 1955 | if (!list_empty(®_requests_list)) { |
| 1956 | list_for_each_entry_safe(reg_request, tmp, |
| 1957 | ®_requests_list, list) { |
| 1958 | if (reg_request->initiator != |
| 1959 | NL80211_REGDOM_SET_BY_USER) |
| 1960 | continue; |
Wei Yongjun | 00a9ac4 | 2012-09-05 14:34:12 +0800 | [diff] [blame] | 1961 | list_move_tail(®_request->list, &tmp_reg_req_list); |
Luis R. Rodriguez | 1460955 | 2011-04-05 10:49:03 -0700 | [diff] [blame] | 1962 | } |
| 1963 | } |
| 1964 | spin_unlock(®_requests_lock); |
| 1965 | |
Luis R. Rodriguez | 09d989d | 2010-01-29 19:58:57 -0500 | [diff] [blame] | 1966 | /* Clear beacon hints */ |
| 1967 | spin_lock_bh(®_pending_beacons_lock); |
| 1968 | if (!list_empty(®_pending_beacons)) { |
| 1969 | list_for_each_entry_safe(reg_beacon, btmp, |
| 1970 | ®_pending_beacons, list) { |
| 1971 | list_del(®_beacon->list); |
| 1972 | kfree(reg_beacon); |
| 1973 | } |
| 1974 | } |
| 1975 | spin_unlock_bh(®_pending_beacons_lock); |
| 1976 | |
| 1977 | if (!list_empty(®_beacon_list)) { |
| 1978 | list_for_each_entry_safe(reg_beacon, btmp, |
| 1979 | ®_beacon_list, list) { |
| 1980 | list_del(®_beacon->list); |
| 1981 | kfree(reg_beacon); |
| 1982 | } |
| 1983 | } |
| 1984 | |
| 1985 | /* First restore to the basic regulatory settings */ |
| 1986 | cfg80211_regdomain = cfg80211_world_regdom; |
Dmitry Shmidt | cee0bec | 2011-12-19 12:32:21 -0800 | [diff] [blame] | 1987 | world_alpha2[0] = cfg80211_regdomain->alpha2[0]; |
| 1988 | world_alpha2[1] = cfg80211_regdomain->alpha2[1]; |
Luis R. Rodriguez | 09d989d | 2010-01-29 19:58:57 -0500 | [diff] [blame] | 1989 | |
Rajkumar Manoharan | 5ce543d | 2011-12-07 21:50:08 +0530 | [diff] [blame] | 1990 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) { |
| 1991 | if (rdev->wiphy.flags & WIPHY_FLAG_CUSTOM_REGULATORY) |
| 1992 | restore_custom_reg_settings(&rdev->wiphy); |
| 1993 | } |
| 1994 | |
Luis R. Rodriguez | 09d989d | 2010-01-29 19:58:57 -0500 | [diff] [blame] | 1995 | mutex_unlock(®_mutex); |
| 1996 | mutex_unlock(&cfg80211_mutex); |
| 1997 | |
Dmitry Shmidt | cee0bec | 2011-12-19 12:32:21 -0800 | [diff] [blame] | 1998 | regulatory_hint_core(world_alpha2); |
Luis R. Rodriguez | 09d989d | 2010-01-29 19:58:57 -0500 | [diff] [blame] | 1999 | |
| 2000 | /* |
| 2001 | * This restores the ieee80211_regdom module parameter |
| 2002 | * preference or the last user requested regulatory |
| 2003 | * settings, user regulatory settings takes precedence. |
| 2004 | */ |
| 2005 | if (is_an_alpha2(alpha2)) |
Luis R. Rodriguez | 57b5ce0 | 2012-07-12 11:49:18 -0700 | [diff] [blame] | 2006 | regulatory_hint_user(user_alpha2, NL80211_USER_REG_HINT_USER); |
Luis R. Rodriguez | 09d989d | 2010-01-29 19:58:57 -0500 | [diff] [blame] | 2007 | |
Luis R. Rodriguez | 1460955 | 2011-04-05 10:49:03 -0700 | [diff] [blame] | 2008 | if (list_empty(&tmp_reg_req_list)) |
| 2009 | return; |
| 2010 | |
| 2011 | mutex_lock(&cfg80211_mutex); |
| 2012 | mutex_lock(®_mutex); |
| 2013 | |
| 2014 | spin_lock(®_requests_lock); |
| 2015 | list_for_each_entry_safe(reg_request, tmp, &tmp_reg_req_list, list) { |
| 2016 | REG_DBG_PRINT("Adding request for country %c%c back " |
| 2017 | "into the queue\n", |
| 2018 | reg_request->alpha2[0], |
| 2019 | reg_request->alpha2[1]); |
Wei Yongjun | 00a9ac4 | 2012-09-05 14:34:12 +0800 | [diff] [blame] | 2020 | list_move_tail(®_request->list, ®_requests_list); |
Luis R. Rodriguez | 1460955 | 2011-04-05 10:49:03 -0700 | [diff] [blame] | 2021 | } |
| 2022 | spin_unlock(®_requests_lock); |
| 2023 | |
| 2024 | mutex_unlock(®_mutex); |
| 2025 | mutex_unlock(&cfg80211_mutex); |
| 2026 | |
| 2027 | REG_DBG_PRINT("Kicking the queue\n"); |
| 2028 | |
| 2029 | schedule_work(®_work); |
| 2030 | } |
Luis R. Rodriguez | 09d989d | 2010-01-29 19:58:57 -0500 | [diff] [blame] | 2031 | |
| 2032 | void regulatory_hint_disconnect(void) |
| 2033 | { |
Luis R. Rodriguez | d91e41b | 2010-10-20 10:18:59 -0700 | [diff] [blame] | 2034 | REG_DBG_PRINT("All devices are disconnected, going to " |
Luis R. Rodriguez | 09d989d | 2010-01-29 19:58:57 -0500 | [diff] [blame] | 2035 | "restore regulatory settings\n"); |
| 2036 | restore_regulatory_settings(false); |
| 2037 | } |
| 2038 | |
Luis R. Rodriguez | e38f8a7 | 2009-02-21 00:20:39 -0500 | [diff] [blame] | 2039 | static bool freq_is_chan_12_13_14(u16 freq) |
| 2040 | { |
Bruno Randolf | 59eb21a | 2011-01-17 13:37:28 +0900 | [diff] [blame] | 2041 | if (freq == ieee80211_channel_to_frequency(12, IEEE80211_BAND_2GHZ) || |
| 2042 | freq == ieee80211_channel_to_frequency(13, IEEE80211_BAND_2GHZ) || |
| 2043 | freq == ieee80211_channel_to_frequency(14, IEEE80211_BAND_2GHZ)) |
Luis R. Rodriguez | e38f8a7 | 2009-02-21 00:20:39 -0500 | [diff] [blame] | 2044 | return true; |
| 2045 | return false; |
| 2046 | } |
| 2047 | |
| 2048 | int regulatory_hint_found_beacon(struct wiphy *wiphy, |
| 2049 | struct ieee80211_channel *beacon_chan, |
| 2050 | gfp_t gfp) |
| 2051 | { |
| 2052 | struct reg_beacon *reg_beacon; |
| 2053 | |
| 2054 | if (likely((beacon_chan->beacon_found || |
| 2055 | (beacon_chan->flags & IEEE80211_CHAN_RADAR) || |
| 2056 | (beacon_chan->band == IEEE80211_BAND_2GHZ && |
| 2057 | !freq_is_chan_12_13_14(beacon_chan->center_freq))))) |
| 2058 | return 0; |
| 2059 | |
| 2060 | reg_beacon = kzalloc(sizeof(struct reg_beacon), gfp); |
| 2061 | if (!reg_beacon) |
| 2062 | return -ENOMEM; |
| 2063 | |
Luis R. Rodriguez | d91e41b | 2010-10-20 10:18:59 -0700 | [diff] [blame] | 2064 | REG_DBG_PRINT("Found new beacon on " |
Luis R. Rodriguez | 4113f75 | 2010-01-04 11:50:11 -0500 | [diff] [blame] | 2065 | "frequency: %d MHz (Ch %d) on %s\n", |
| 2066 | beacon_chan->center_freq, |
| 2067 | ieee80211_frequency_to_channel(beacon_chan->center_freq), |
| 2068 | wiphy_name(wiphy)); |
| 2069 | |
Luis R. Rodriguez | e38f8a7 | 2009-02-21 00:20:39 -0500 | [diff] [blame] | 2070 | memcpy(®_beacon->chan, beacon_chan, |
| 2071 | sizeof(struct ieee80211_channel)); |
| 2072 | |
| 2073 | |
| 2074 | /* |
| 2075 | * Since we can be called from BH or and non-BH context |
| 2076 | * we must use spin_lock_bh() |
| 2077 | */ |
| 2078 | spin_lock_bh(®_pending_beacons_lock); |
| 2079 | list_add_tail(®_beacon->list, ®_pending_beacons); |
| 2080 | spin_unlock_bh(®_pending_beacons_lock); |
| 2081 | |
| 2082 | schedule_work(®_work); |
| 2083 | |
| 2084 | return 0; |
| 2085 | } |
| 2086 | |
Johannes Berg | a3d2eaf | 2008-09-15 11:10:52 +0200 | [diff] [blame] | 2087 | static void print_rd_rules(const struct ieee80211_regdomain *rd) |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 2088 | { |
| 2089 | unsigned int i; |
Johannes Berg | a3d2eaf | 2008-09-15 11:10:52 +0200 | [diff] [blame] | 2090 | const struct ieee80211_reg_rule *reg_rule = NULL; |
| 2091 | const struct ieee80211_freq_range *freq_range = NULL; |
| 2092 | const struct ieee80211_power_rule *power_rule = NULL; |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 2093 | |
Luis R. Rodriguez | 6653325 | 2011-12-20 12:23:37 -0800 | [diff] [blame] | 2094 | 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] | 2095 | |
| 2096 | for (i = 0; i < rd->n_reg_rules; i++) { |
| 2097 | reg_rule = &rd->reg_rules[i]; |
| 2098 | freq_range = ®_rule->freq_range; |
| 2099 | power_rule = ®_rule->power_rule; |
| 2100 | |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 2101 | /* |
| 2102 | * There may not be documentation for max antenna gain |
| 2103 | * in certain regions |
| 2104 | */ |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 2105 | if (power_rule->max_antenna_gain) |
Luis R. Rodriguez | 6653325 | 2011-12-20 12:23:37 -0800 | [diff] [blame] | 2106 | 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] | 2107 | freq_range->start_freq_khz, |
| 2108 | freq_range->end_freq_khz, |
| 2109 | freq_range->max_bandwidth_khz, |
| 2110 | power_rule->max_antenna_gain, |
| 2111 | power_rule->max_eirp); |
| 2112 | else |
Luis R. Rodriguez | 6653325 | 2011-12-20 12:23:37 -0800 | [diff] [blame] | 2113 | 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] | 2114 | freq_range->start_freq_khz, |
| 2115 | freq_range->end_freq_khz, |
| 2116 | freq_range->max_bandwidth_khz, |
| 2117 | power_rule->max_eirp); |
| 2118 | } |
| 2119 | } |
| 2120 | |
Luis R. Rodriguez | 8b60b07 | 2011-10-11 10:59:02 -0700 | [diff] [blame] | 2121 | bool reg_supported_dfs_region(u8 dfs_region) |
| 2122 | { |
| 2123 | switch (dfs_region) { |
| 2124 | case NL80211_DFS_UNSET: |
| 2125 | case NL80211_DFS_FCC: |
| 2126 | case NL80211_DFS_ETSI: |
| 2127 | case NL80211_DFS_JP: |
| 2128 | return true; |
| 2129 | default: |
| 2130 | REG_DBG_PRINT("Ignoring uknown DFS master region: %d\n", |
| 2131 | dfs_region); |
| 2132 | return false; |
| 2133 | } |
| 2134 | } |
| 2135 | |
| 2136 | static void print_dfs_region(u8 dfs_region) |
| 2137 | { |
| 2138 | if (!dfs_region) |
| 2139 | return; |
| 2140 | |
| 2141 | switch (dfs_region) { |
| 2142 | case NL80211_DFS_FCC: |
| 2143 | pr_info(" DFS Master region FCC"); |
| 2144 | break; |
| 2145 | case NL80211_DFS_ETSI: |
| 2146 | pr_info(" DFS Master region ETSI"); |
| 2147 | break; |
| 2148 | case NL80211_DFS_JP: |
| 2149 | pr_info(" DFS Master region JP"); |
| 2150 | break; |
| 2151 | default: |
| 2152 | pr_info(" DFS Master region Uknown"); |
| 2153 | break; |
| 2154 | } |
| 2155 | } |
| 2156 | |
Johannes Berg | a3d2eaf | 2008-09-15 11:10:52 +0200 | [diff] [blame] | 2157 | static void print_regdomain(const struct ieee80211_regdomain *rd) |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 2158 | { |
| 2159 | |
Luis R. Rodriguez | 3f2355c | 2008-11-12 14:22:02 -0800 | [diff] [blame] | 2160 | if (is_intersected_alpha2(rd->alpha2)) { |
Luis R. Rodriguez | 3f2355c | 2008-11-12 14:22:02 -0800 | [diff] [blame] | 2161 | |
Luis R. Rodriguez | 7db90f4 | 2009-03-09 22:07:41 -0400 | [diff] [blame] | 2162 | if (last_request->initiator == |
| 2163 | NL80211_REGDOM_SET_BY_COUNTRY_IE) { |
Johannes Berg | 79c97e9 | 2009-07-07 03:56:12 +0200 | [diff] [blame] | 2164 | struct cfg80211_registered_device *rdev; |
| 2165 | rdev = cfg80211_rdev_by_wiphy_idx( |
Luis R. Rodriguez | 806a9e3 | 2009-02-21 00:04:26 -0500 | [diff] [blame] | 2166 | last_request->wiphy_idx); |
Johannes Berg | 79c97e9 | 2009-07-07 03:56:12 +0200 | [diff] [blame] | 2167 | if (rdev) { |
Joe Perches | e9c0268 | 2010-11-16 19:56:49 -0800 | [diff] [blame] | 2168 | pr_info("Current regulatory domain updated by AP to: %c%c\n", |
Johannes Berg | 79c97e9 | 2009-07-07 03:56:12 +0200 | [diff] [blame] | 2169 | rdev->country_ie_alpha2[0], |
| 2170 | rdev->country_ie_alpha2[1]); |
Luis R. Rodriguez | 3f2355c | 2008-11-12 14:22:02 -0800 | [diff] [blame] | 2171 | } else |
Joe Perches | e9c0268 | 2010-11-16 19:56:49 -0800 | [diff] [blame] | 2172 | pr_info("Current regulatory domain intersected:\n"); |
Luis R. Rodriguez | 3f2355c | 2008-11-12 14:22:02 -0800 | [diff] [blame] | 2173 | } else |
Joe Perches | e9c0268 | 2010-11-16 19:56:49 -0800 | [diff] [blame] | 2174 | pr_info("Current regulatory domain intersected:\n"); |
Luis R. Rodriguez | 3f2355c | 2008-11-12 14:22:02 -0800 | [diff] [blame] | 2175 | } else if (is_world_regdom(rd->alpha2)) |
Joe Perches | e9c0268 | 2010-11-16 19:56:49 -0800 | [diff] [blame] | 2176 | pr_info("World regulatory domain updated:\n"); |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 2177 | else { |
| 2178 | if (is_unknown_alpha2(rd->alpha2)) |
Joe Perches | e9c0268 | 2010-11-16 19:56:49 -0800 | [diff] [blame] | 2179 | pr_info("Regulatory domain changed to driver built-in settings (unknown country)\n"); |
Luis R. Rodriguez | 57b5ce0 | 2012-07-12 11:49:18 -0700 | [diff] [blame] | 2180 | else { |
| 2181 | if (reg_request_cell_base(last_request)) |
| 2182 | pr_info("Regulatory domain changed " |
| 2183 | "to country: %c%c by Cell Station\n", |
| 2184 | rd->alpha2[0], rd->alpha2[1]); |
| 2185 | else |
| 2186 | pr_info("Regulatory domain changed " |
| 2187 | "to country: %c%c\n", |
| 2188 | rd->alpha2[0], rd->alpha2[1]); |
| 2189 | } |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 2190 | } |
Luis R. Rodriguez | 8b60b07 | 2011-10-11 10:59:02 -0700 | [diff] [blame] | 2191 | print_dfs_region(rd->dfs_region); |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 2192 | print_rd_rules(rd); |
| 2193 | } |
| 2194 | |
Johannes Berg | 2df7816 | 2008-10-28 16:49:41 +0100 | [diff] [blame] | 2195 | static void print_regdomain_info(const struct ieee80211_regdomain *rd) |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 2196 | { |
Joe Perches | e9c0268 | 2010-11-16 19:56:49 -0800 | [diff] [blame] | 2197 | 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] | 2198 | print_rd_rules(rd); |
| 2199 | } |
| 2200 | |
Johannes Berg | d2372b3 | 2008-10-24 20:32:20 +0200 | [diff] [blame] | 2201 | /* Takes ownership of rd only if it doesn't fail */ |
Johannes Berg | a3d2eaf | 2008-09-15 11:10:52 +0200 | [diff] [blame] | 2202 | static int __set_regdom(const struct ieee80211_regdomain *rd) |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 2203 | { |
Luis R. Rodriguez | 9c96477 | 2008-10-30 13:33:53 -0700 | [diff] [blame] | 2204 | const struct ieee80211_regdomain *intersected_rd = NULL; |
Luis R. Rodriguez | 806a9e3 | 2009-02-21 00:04:26 -0500 | [diff] [blame] | 2205 | struct wiphy *request_wiphy; |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 2206 | /* Some basic sanity checks first */ |
| 2207 | |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 2208 | if (is_world_regdom(rd->alpha2)) { |
Johannes Berg | f6037d0 | 2008-10-21 11:01:33 +0200 | [diff] [blame] | 2209 | if (WARN_ON(!reg_is_valid_request(rd->alpha2))) |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 2210 | return -EINVAL; |
| 2211 | update_world_regdomain(rd); |
| 2212 | return 0; |
| 2213 | } |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 2214 | |
| 2215 | if (!is_alpha2_set(rd->alpha2) && !is_an_alpha2(rd->alpha2) && |
| 2216 | !is_unknown_alpha2(rd->alpha2)) |
| 2217 | return -EINVAL; |
| 2218 | |
Johannes Berg | f6037d0 | 2008-10-21 11:01:33 +0200 | [diff] [blame] | 2219 | if (!last_request) |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 2220 | return -EINVAL; |
| 2221 | |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 2222 | /* |
| 2223 | * Lets only bother proceeding on the same alpha2 if the current |
Luis R. Rodriguez | 3f2355c | 2008-11-12 14:22:02 -0800 | [diff] [blame] | 2224 | * 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] | 2225 | * and the pending request came in from a country IE |
| 2226 | */ |
Luis R. Rodriguez | 7db90f4 | 2009-03-09 22:07:41 -0400 | [diff] [blame] | 2227 | if (last_request->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE) { |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 2228 | /* |
| 2229 | * If someone else asked us to change the rd lets only bother |
| 2230 | * checking if the alpha2 changes if CRDA was already called |
| 2231 | */ |
John W. Linville | baeb66f | 2009-12-18 17:59:02 -0500 | [diff] [blame] | 2232 | if (!regdom_changes(rd->alpha2)) |
Kalle Valo | 9590853 | 2012-07-12 15:33:58 +0300 | [diff] [blame] | 2233 | return -EALREADY; |
Luis R. Rodriguez | 3f2355c | 2008-11-12 14:22:02 -0800 | [diff] [blame] | 2234 | } |
| 2235 | |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 2236 | /* |
| 2237 | * Now lets set the regulatory domain, update all driver channels |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 2238 | * and finally inform them of what we have done, in case they want |
| 2239 | * to review or adjust their own settings based on their own |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 2240 | * internal EEPROM data |
| 2241 | */ |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 2242 | |
Johannes Berg | f6037d0 | 2008-10-21 11:01:33 +0200 | [diff] [blame] | 2243 | if (WARN_ON(!reg_is_valid_request(rd->alpha2))) |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 2244 | return -EINVAL; |
| 2245 | |
Luis R. Rodriguez | 8375af3 | 2008-11-12 14:21:57 -0800 | [diff] [blame] | 2246 | if (!is_valid_rd(rd)) { |
Joe Perches | e9c0268 | 2010-11-16 19:56:49 -0800 | [diff] [blame] | 2247 | pr_err("Invalid regulatory domain detected:\n"); |
Luis R. Rodriguez | 8375af3 | 2008-11-12 14:21:57 -0800 | [diff] [blame] | 2248 | print_regdomain_info(rd); |
| 2249 | return -EINVAL; |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 2250 | } |
| 2251 | |
Luis R. Rodriguez | 806a9e3 | 2009-02-21 00:04:26 -0500 | [diff] [blame] | 2252 | request_wiphy = wiphy_idx_to_wiphy(last_request->wiphy_idx); |
Luis R. Rodriguez | 0bac71a | 2011-11-28 16:47:16 -0500 | [diff] [blame] | 2253 | if (!request_wiphy && |
| 2254 | (last_request->initiator == NL80211_REGDOM_SET_BY_DRIVER || |
| 2255 | last_request->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE)) { |
| 2256 | schedule_delayed_work(®_timeout, 0); |
Johannes Berg | de3584b | 2011-11-21 10:44:00 +0100 | [diff] [blame] | 2257 | return -ENODEV; |
| 2258 | } |
Luis R. Rodriguez | 806a9e3 | 2009-02-21 00:04:26 -0500 | [diff] [blame] | 2259 | |
Luis R. Rodriguez | b8295ac | 2008-11-12 14:21:58 -0800 | [diff] [blame] | 2260 | if (!last_request->intersect) { |
Luis R. Rodriguez | 3e0c3ff | 2009-01-07 17:43:34 -0800 | [diff] [blame] | 2261 | int r; |
| 2262 | |
Luis R. Rodriguez | 7db90f4 | 2009-03-09 22:07:41 -0400 | [diff] [blame] | 2263 | if (last_request->initiator != NL80211_REGDOM_SET_BY_DRIVER) { |
Luis R. Rodriguez | a042994 | 2011-11-28 16:47:15 -0500 | [diff] [blame] | 2264 | reset_regdomains(false); |
Luis R. Rodriguez | 3e0c3ff | 2009-01-07 17:43:34 -0800 | [diff] [blame] | 2265 | cfg80211_regdomain = rd; |
| 2266 | return 0; |
| 2267 | } |
| 2268 | |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 2269 | /* |
| 2270 | * For a driver hint, lets copy the regulatory domain the |
| 2271 | * driver wanted to the wiphy to deal with conflicts |
| 2272 | */ |
Luis R. Rodriguez | 3e0c3ff | 2009-01-07 17:43:34 -0800 | [diff] [blame] | 2273 | |
Luis R. Rodriguez | 558f6d3 | 2009-06-08 18:54:37 -0700 | [diff] [blame] | 2274 | /* |
| 2275 | * Userspace could have sent two replies with only |
| 2276 | * one kernel request. |
| 2277 | */ |
| 2278 | if (request_wiphy->regd) |
| 2279 | return -EALREADY; |
Luis R. Rodriguez | 3e0c3ff | 2009-01-07 17:43:34 -0800 | [diff] [blame] | 2280 | |
Luis R. Rodriguez | 806a9e3 | 2009-02-21 00:04:26 -0500 | [diff] [blame] | 2281 | r = reg_copy_regd(&request_wiphy->regd, rd); |
Luis R. Rodriguez | 3e0c3ff | 2009-01-07 17:43:34 -0800 | [diff] [blame] | 2282 | if (r) |
| 2283 | return r; |
| 2284 | |
Luis R. Rodriguez | a042994 | 2011-11-28 16:47:15 -0500 | [diff] [blame] | 2285 | reset_regdomains(false); |
Luis R. Rodriguez | b8295ac | 2008-11-12 14:21:58 -0800 | [diff] [blame] | 2286 | cfg80211_regdomain = rd; |
| 2287 | return 0; |
| 2288 | } |
| 2289 | |
| 2290 | /* Intersection requires a bit more work */ |
| 2291 | |
Luis R. Rodriguez | 7db90f4 | 2009-03-09 22:07:41 -0400 | [diff] [blame] | 2292 | if (last_request->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE) { |
Luis R. Rodriguez | b8295ac | 2008-11-12 14:21:58 -0800 | [diff] [blame] | 2293 | |
Luis R. Rodriguez | 9c96477 | 2008-10-30 13:33:53 -0700 | [diff] [blame] | 2294 | intersected_rd = regdom_intersect(rd, cfg80211_regdomain); |
| 2295 | if (!intersected_rd) |
| 2296 | return -EINVAL; |
Luis R. Rodriguez | b8295ac | 2008-11-12 14:21:58 -0800 | [diff] [blame] | 2297 | |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 2298 | /* |
| 2299 | * We can trash what CRDA provided now. |
Luis R. Rodriguez | 3e0c3ff | 2009-01-07 17:43:34 -0800 | [diff] [blame] | 2300 | * However if a driver requested this specific regulatory |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 2301 | * domain we keep it for its private use |
| 2302 | */ |
Luis R. Rodriguez | 7db90f4 | 2009-03-09 22:07:41 -0400 | [diff] [blame] | 2303 | if (last_request->initiator == NL80211_REGDOM_SET_BY_DRIVER) |
Luis R. Rodriguez | 806a9e3 | 2009-02-21 00:04:26 -0500 | [diff] [blame] | 2304 | request_wiphy->regd = rd; |
Luis R. Rodriguez | 3e0c3ff | 2009-01-07 17:43:34 -0800 | [diff] [blame] | 2305 | else |
| 2306 | kfree(rd); |
| 2307 | |
Luis R. Rodriguez | b8295ac | 2008-11-12 14:21:58 -0800 | [diff] [blame] | 2308 | rd = NULL; |
| 2309 | |
Luis R. Rodriguez | a042994 | 2011-11-28 16:47:15 -0500 | [diff] [blame] | 2310 | reset_regdomains(false); |
Luis R. Rodriguez | b8295ac | 2008-11-12 14:21:58 -0800 | [diff] [blame] | 2311 | cfg80211_regdomain = intersected_rd; |
| 2312 | |
| 2313 | return 0; |
Luis R. Rodriguez | 9c96477 | 2008-10-30 13:33:53 -0700 | [diff] [blame] | 2314 | } |
| 2315 | |
Alan Cox | f3baed5 | 2012-09-17 11:54:15 +0100 | [diff] [blame] | 2316 | return -EINVAL; |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 2317 | } |
| 2318 | |
| 2319 | |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 2320 | /* |
| 2321 | * Use this call to set the current regulatory domain. Conflicts with |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 2322 | * multiple drivers can be ironed out later. Caller must've already |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 2323 | * kmalloc'd the rd structure. Caller must hold cfg80211_mutex |
| 2324 | */ |
Johannes Berg | a3d2eaf | 2008-09-15 11:10:52 +0200 | [diff] [blame] | 2325 | int set_regdom(const struct ieee80211_regdomain *rd) |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 2326 | { |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 2327 | int r; |
| 2328 | |
Luis R. Rodriguez | 761cf7e | 2009-02-21 00:04:25 -0500 | [diff] [blame] | 2329 | assert_cfg80211_lock(); |
| 2330 | |
Luis R. Rodriguez | abc7381 | 2009-07-30 17:38:08 -0700 | [diff] [blame] | 2331 | mutex_lock(®_mutex); |
| 2332 | |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 2333 | /* Note that this doesn't update the wiphys, this is done below */ |
| 2334 | r = __set_regdom(rd); |
Johannes Berg | d2372b3 | 2008-10-24 20:32:20 +0200 | [diff] [blame] | 2335 | if (r) { |
Kalle Valo | 9590853 | 2012-07-12 15:33:58 +0300 | [diff] [blame] | 2336 | if (r == -EALREADY) |
| 2337 | reg_set_request_processed(); |
| 2338 | |
Johannes Berg | d2372b3 | 2008-10-24 20:32:20 +0200 | [diff] [blame] | 2339 | kfree(rd); |
Luis R. Rodriguez | abc7381 | 2009-07-30 17:38:08 -0700 | [diff] [blame] | 2340 | mutex_unlock(®_mutex); |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 2341 | return r; |
Johannes Berg | d2372b3 | 2008-10-24 20:32:20 +0200 | [diff] [blame] | 2342 | } |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 2343 | |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 2344 | /* This would make this whole thing pointless */ |
Luis R. Rodriguez | a01ddaf | 2008-11-12 14:21:59 -0800 | [diff] [blame] | 2345 | if (!last_request->intersect) |
| 2346 | BUG_ON(rd != cfg80211_regdomain); |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 2347 | |
| 2348 | /* update all wiphys now with the new established regulatory domain */ |
Johannes Berg | f6037d0 | 2008-10-21 11:01:33 +0200 | [diff] [blame] | 2349 | update_all_wiphy_regulatory(last_request->initiator); |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 2350 | |
Luis R. Rodriguez | a01ddaf | 2008-11-12 14:21:59 -0800 | [diff] [blame] | 2351 | print_regdomain(cfg80211_regdomain); |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 2352 | |
Luis R. Rodriguez | 73d54c9 | 2009-03-09 22:07:42 -0400 | [diff] [blame] | 2353 | nl80211_send_reg_change_event(last_request); |
| 2354 | |
Luis R. Rodriguez | b2e253c | 2010-11-17 21:46:09 -0800 | [diff] [blame] | 2355 | reg_set_request_processed(); |
| 2356 | |
Luis R. Rodriguez | abc7381 | 2009-07-30 17:38:08 -0700 | [diff] [blame] | 2357 | mutex_unlock(®_mutex); |
| 2358 | |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 2359 | return r; |
| 2360 | } |
| 2361 | |
Scott James Remnant | 4d9d88d | 2011-03-08 10:45:30 -0800 | [diff] [blame] | 2362 | #ifdef CONFIG_HOTPLUG |
| 2363 | int reg_device_uevent(struct device *dev, struct kobj_uevent_env *env) |
| 2364 | { |
| 2365 | if (last_request && !last_request->processed) { |
| 2366 | if (add_uevent_var(env, "COUNTRY=%c%c", |
| 2367 | last_request->alpha2[0], |
| 2368 | last_request->alpha2[1])) |
| 2369 | return -ENOMEM; |
| 2370 | } |
| 2371 | |
| 2372 | return 0; |
| 2373 | } |
| 2374 | #else |
| 2375 | int reg_device_uevent(struct device *dev, struct kobj_uevent_env *env) |
| 2376 | { |
| 2377 | return -ENODEV; |
| 2378 | } |
| 2379 | #endif /* CONFIG_HOTPLUG */ |
| 2380 | |
Luis R. Rodriguez | 57b5ce0 | 2012-07-12 11:49:18 -0700 | [diff] [blame] | 2381 | void wiphy_regulatory_register(struct wiphy *wiphy) |
| 2382 | { |
| 2383 | assert_cfg80211_lock(); |
| 2384 | |
| 2385 | mutex_lock(®_mutex); |
| 2386 | |
| 2387 | if (!reg_dev_ignore_cell_hint(wiphy)) |
| 2388 | reg_num_devs_support_basehint++; |
| 2389 | |
Luis R. Rodriguez | 14cdf11 | 2012-07-12 11:49:21 -0700 | [diff] [blame] | 2390 | wiphy_update_regulatory(wiphy, NL80211_REGDOM_SET_BY_CORE); |
Luis R. Rodriguez | f8a1c77 | 2012-07-12 11:49:20 -0700 | [diff] [blame] | 2391 | |
Luis R. Rodriguez | 14cdf11 | 2012-07-12 11:49:21 -0700 | [diff] [blame] | 2392 | mutex_unlock(®_mutex); |
Luis R. Rodriguez | 57b5ce0 | 2012-07-12 11:49:18 -0700 | [diff] [blame] | 2393 | } |
| 2394 | |
Luis R. Rodriguez | a179439 | 2009-02-21 00:04:21 -0500 | [diff] [blame] | 2395 | /* Caller must hold cfg80211_mutex */ |
Luis R. Rodriguez | bfead08 | 2012-07-12 11:49:19 -0700 | [diff] [blame] | 2396 | void wiphy_regulatory_deregister(struct wiphy *wiphy) |
Luis R. Rodriguez | 3f2355c | 2008-11-12 14:22:02 -0800 | [diff] [blame] | 2397 | { |
Luis R. Rodriguez | 0ad8aca | 2009-03-24 21:21:08 -0400 | [diff] [blame] | 2398 | struct wiphy *request_wiphy = NULL; |
Luis R. Rodriguez | 806a9e3 | 2009-02-21 00:04:26 -0500 | [diff] [blame] | 2399 | |
Luis R. Rodriguez | 761cf7e | 2009-02-21 00:04:25 -0500 | [diff] [blame] | 2400 | assert_cfg80211_lock(); |
| 2401 | |
Luis R. Rodriguez | abc7381 | 2009-07-30 17:38:08 -0700 | [diff] [blame] | 2402 | mutex_lock(®_mutex); |
| 2403 | |
Luis R. Rodriguez | 57b5ce0 | 2012-07-12 11:49:18 -0700 | [diff] [blame] | 2404 | if (!reg_dev_ignore_cell_hint(wiphy)) |
| 2405 | reg_num_devs_support_basehint--; |
| 2406 | |
Chris Wright | 0ef9ccd | 2009-04-24 14:09:31 -0700 | [diff] [blame] | 2407 | kfree(wiphy->regd); |
| 2408 | |
Luis R. Rodriguez | 0ad8aca | 2009-03-24 21:21:08 -0400 | [diff] [blame] | 2409 | if (last_request) |
| 2410 | request_wiphy = wiphy_idx_to_wiphy(last_request->wiphy_idx); |
Luis R. Rodriguez | 806a9e3 | 2009-02-21 00:04:26 -0500 | [diff] [blame] | 2411 | |
Chris Wright | 0ef9ccd | 2009-04-24 14:09:31 -0700 | [diff] [blame] | 2412 | if (!request_wiphy || request_wiphy != wiphy) |
Luis R. Rodriguez | abc7381 | 2009-07-30 17:38:08 -0700 | [diff] [blame] | 2413 | goto out; |
Chris Wright | 0ef9ccd | 2009-04-24 14:09:31 -0700 | [diff] [blame] | 2414 | |
Luis R. Rodriguez | 806a9e3 | 2009-02-21 00:04:26 -0500 | [diff] [blame] | 2415 | last_request->wiphy_idx = WIPHY_IDX_STALE; |
Luis R. Rodriguez | 3f2355c | 2008-11-12 14:22:02 -0800 | [diff] [blame] | 2416 | last_request->country_ie_env = ENVIRON_ANY; |
Luis R. Rodriguez | abc7381 | 2009-07-30 17:38:08 -0700 | [diff] [blame] | 2417 | out: |
| 2418 | mutex_unlock(®_mutex); |
Luis R. Rodriguez | 3f2355c | 2008-11-12 14:22:02 -0800 | [diff] [blame] | 2419 | } |
| 2420 | |
Luis R. Rodriguez | a90c7a3 | 2011-04-05 10:49:04 -0700 | [diff] [blame] | 2421 | static void reg_timeout_work(struct work_struct *work) |
| 2422 | { |
| 2423 | REG_DBG_PRINT("Timeout while waiting for CRDA to reply, " |
Joe Perches | 12c5ffb | 2011-07-29 14:51:25 -0700 | [diff] [blame] | 2424 | "restoring regulatory settings\n"); |
Luis R. Rodriguez | a90c7a3 | 2011-04-05 10:49:04 -0700 | [diff] [blame] | 2425 | restore_regulatory_settings(true); |
| 2426 | } |
| 2427 | |
Uwe Kleine-König | 2fcc9f7 | 2010-06-18 09:38:55 +0200 | [diff] [blame] | 2428 | int __init regulatory_init(void) |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 2429 | { |
Luis R. Rodriguez | bcf4f99 | 2009-02-21 00:04:24 -0500 | [diff] [blame] | 2430 | int err = 0; |
Johannes Berg | 734366d | 2008-09-15 10:56:48 +0200 | [diff] [blame] | 2431 | |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 2432 | reg_pdev = platform_device_register_simple("regulatory", 0, NULL, 0); |
| 2433 | if (IS_ERR(reg_pdev)) |
| 2434 | return PTR_ERR(reg_pdev); |
Johannes Berg | 734366d | 2008-09-15 10:56:48 +0200 | [diff] [blame] | 2435 | |
Scott James Remnant | 4d9d88d | 2011-03-08 10:45:30 -0800 | [diff] [blame] | 2436 | reg_pdev->dev.type = ®_device_type; |
| 2437 | |
Luis R. Rodriguez | fe33eb3 | 2009-02-21 00:04:30 -0500 | [diff] [blame] | 2438 | spin_lock_init(®_requests_lock); |
Luis R. Rodriguez | e38f8a7 | 2009-02-21 00:20:39 -0500 | [diff] [blame] | 2439 | spin_lock_init(®_pending_beacons_lock); |
Luis R. Rodriguez | fe33eb3 | 2009-02-21 00:04:30 -0500 | [diff] [blame] | 2440 | |
Luis R. Rodriguez | 80007ef | 2012-03-23 07:23:31 -0700 | [diff] [blame] | 2441 | reg_regdb_size_check(); |
| 2442 | |
Johannes Berg | a3d2eaf | 2008-09-15 11:10:52 +0200 | [diff] [blame] | 2443 | cfg80211_regdomain = cfg80211_world_regdom; |
Johannes Berg | 734366d | 2008-09-15 10:56:48 +0200 | [diff] [blame] | 2444 | |
Luis R. Rodriguez | 09d989d | 2010-01-29 19:58:57 -0500 | [diff] [blame] | 2445 | user_alpha2[0] = '9'; |
| 2446 | user_alpha2[1] = '7'; |
| 2447 | |
Luis R. Rodriguez | ae9e4b0 | 2009-07-14 20:23:15 -0400 | [diff] [blame] | 2448 | /* We always try to get an update for the static regdomain */ |
| 2449 | err = regulatory_hint_core(cfg80211_regdomain->alpha2); |
Luis R. Rodriguez | bcf4f99 | 2009-02-21 00:04:24 -0500 | [diff] [blame] | 2450 | if (err) { |
| 2451 | if (err == -ENOMEM) |
| 2452 | return err; |
| 2453 | /* |
| 2454 | * N.B. kobject_uevent_env() can fail mainly for when we're out |
| 2455 | * memory which is handled and propagated appropriately above |
| 2456 | * but it can also fail during a netlink_broadcast() or during |
| 2457 | * early boot for call_usermodehelper(). For now treat these |
| 2458 | * errors as non-fatal. |
| 2459 | */ |
Joe Perches | e9c0268 | 2010-11-16 19:56:49 -0800 | [diff] [blame] | 2460 | 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] | 2461 | #ifdef CONFIG_CFG80211_REG_DEBUG |
| 2462 | /* We want to find out exactly why when debugging */ |
| 2463 | WARN_ON(err); |
| 2464 | #endif |
| 2465 | } |
Johannes Berg | 734366d | 2008-09-15 10:56:48 +0200 | [diff] [blame] | 2466 | |
Luis R. Rodriguez | ae9e4b0 | 2009-07-14 20:23:15 -0400 | [diff] [blame] | 2467 | /* |
| 2468 | * Finally, if the user set the module parameter treat it |
| 2469 | * as a user hint. |
| 2470 | */ |
| 2471 | if (!is_world_regdom(ieee80211_regdom)) |
Luis R. Rodriguez | 57b5ce0 | 2012-07-12 11:49:18 -0700 | [diff] [blame] | 2472 | regulatory_hint_user(ieee80211_regdom, |
| 2473 | NL80211_USER_REG_HINT_USER); |
Luis R. Rodriguez | ae9e4b0 | 2009-07-14 20:23:15 -0400 | [diff] [blame] | 2474 | |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 2475 | return 0; |
| 2476 | } |
| 2477 | |
Uwe Kleine-König | 2fcc9f7 | 2010-06-18 09:38:55 +0200 | [diff] [blame] | 2478 | void /* __init_or_exit */ regulatory_exit(void) |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 2479 | { |
Luis R. Rodriguez | fe33eb3 | 2009-02-21 00:04:30 -0500 | [diff] [blame] | 2480 | struct regulatory_request *reg_request, *tmp; |
Luis R. Rodriguez | e38f8a7 | 2009-02-21 00:20:39 -0500 | [diff] [blame] | 2481 | struct reg_beacon *reg_beacon, *btmp; |
Luis R. Rodriguez | fe33eb3 | 2009-02-21 00:04:30 -0500 | [diff] [blame] | 2482 | |
| 2483 | cancel_work_sync(®_work); |
Luis R. Rodriguez | a90c7a3 | 2011-04-05 10:49:04 -0700 | [diff] [blame] | 2484 | cancel_delayed_work_sync(®_timeout); |
Luis R. Rodriguez | fe33eb3 | 2009-02-21 00:04:30 -0500 | [diff] [blame] | 2485 | |
Luis R. Rodriguez | a179439 | 2009-02-21 00:04:21 -0500 | [diff] [blame] | 2486 | mutex_lock(&cfg80211_mutex); |
Luis R. Rodriguez | abc7381 | 2009-07-30 17:38:08 -0700 | [diff] [blame] | 2487 | mutex_lock(®_mutex); |
Johannes Berg | 734366d | 2008-09-15 10:56:48 +0200 | [diff] [blame] | 2488 | |
Luis R. Rodriguez | a042994 | 2011-11-28 16:47:15 -0500 | [diff] [blame] | 2489 | reset_regdomains(true); |
Johannes Berg | 734366d | 2008-09-15 10:56:48 +0200 | [diff] [blame] | 2490 | |
Luis R. Rodriguez | 58ebacc | 2011-11-08 14:28:06 -0800 | [diff] [blame] | 2491 | dev_set_uevent_suppress(®_pdev->dev, true); |
Johannes Berg | f6037d0 | 2008-10-21 11:01:33 +0200 | [diff] [blame] | 2492 | |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 2493 | platform_device_unregister(reg_pdev); |
Johannes Berg | 734366d | 2008-09-15 10:56:48 +0200 | [diff] [blame] | 2494 | |
Luis R. Rodriguez | e38f8a7 | 2009-02-21 00:20:39 -0500 | [diff] [blame] | 2495 | spin_lock_bh(®_pending_beacons_lock); |
| 2496 | if (!list_empty(®_pending_beacons)) { |
| 2497 | list_for_each_entry_safe(reg_beacon, btmp, |
| 2498 | ®_pending_beacons, list) { |
| 2499 | list_del(®_beacon->list); |
| 2500 | kfree(reg_beacon); |
| 2501 | } |
| 2502 | } |
| 2503 | spin_unlock_bh(®_pending_beacons_lock); |
| 2504 | |
| 2505 | if (!list_empty(®_beacon_list)) { |
| 2506 | list_for_each_entry_safe(reg_beacon, btmp, |
| 2507 | ®_beacon_list, list) { |
| 2508 | list_del(®_beacon->list); |
| 2509 | kfree(reg_beacon); |
| 2510 | } |
| 2511 | } |
| 2512 | |
Luis R. Rodriguez | fe33eb3 | 2009-02-21 00:04:30 -0500 | [diff] [blame] | 2513 | spin_lock(®_requests_lock); |
| 2514 | if (!list_empty(®_requests_list)) { |
| 2515 | list_for_each_entry_safe(reg_request, tmp, |
| 2516 | ®_requests_list, list) { |
| 2517 | list_del(®_request->list); |
| 2518 | kfree(reg_request); |
| 2519 | } |
| 2520 | } |
| 2521 | spin_unlock(®_requests_lock); |
| 2522 | |
Luis R. Rodriguez | abc7381 | 2009-07-30 17:38:08 -0700 | [diff] [blame] | 2523 | mutex_unlock(®_mutex); |
Luis R. Rodriguez | a179439 | 2009-02-21 00:04:21 -0500 | [diff] [blame] | 2524 | mutex_unlock(&cfg80211_mutex); |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 2525 | } |