1 2 #ifndef __NET_REGULATORY_H 3 #define __NET_REGULATORY_H 4 /* 5 * regulatory support structures 6 * 7 * Copyright 2008-2009 Luis R. Rodriguez <mcgrof@qca.qualcomm.com> 8 * Copyright (C) 2018 Intel Corporation 9 * 10 * Permission to use, copy, modify, and/or distribute this software for any 11 * purpose with or without fee is hereby granted, provided that the above 12 * copyright notice and this permission notice appear in all copies. 13 * 14 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 15 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 16 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 17 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 18 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 19 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 20 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 21 */ 22 23 #include <linux/ieee80211.h> 24 #include <linux/nl80211.h> 25 #include <linux/rcupdate.h> 26 27 /** 28 * enum environment_cap - Environment parsed from country IE 29 * @ENVIRON_ANY: indicates country IE applies to both indoor and 30 * outdoor operation. 31 * @ENVIRON_INDOOR: indicates country IE applies only to indoor operation 32 * @ENVIRON_OUTDOOR: indicates country IE applies only to outdoor operation 33 */ 34 enum environment_cap { 35 ENVIRON_ANY, 36 ENVIRON_INDOOR, 37 ENVIRON_OUTDOOR, 38 }; 39 40 /** 41 * struct regulatory_request - used to keep track of regulatory requests 42 * 43 * @rcu_head: RCU head struct used to free the request 44 * @wiphy_idx: this is set if this request's initiator is 45 * %REGDOM_SET_BY_COUNTRY_IE or %REGDOM_SET_BY_DRIVER. This 46 * can be used by the wireless core to deal with conflicts 47 * and potentially inform users of which devices specifically 48 * cased the conflicts. 49 * @initiator: indicates who sent this request, could be any of 50 * those set in nl80211_reg_initiator (%NL80211_REGDOM_SET_BY_*) 51 * @alpha2: the ISO / IEC 3166 alpha2 country code of the requested 52 * regulatory domain. We have a few special codes: 53 * 00 - World regulatory domain 54 * 99 - built by driver but a specific alpha2 cannot be determined 55 * 98 - result of an intersection between two regulatory domains 56 * 97 - regulatory domain has not yet been configured 57 * @dfs_region: If CRDA responded with a regulatory domain that requires 58 * DFS master operation on a known DFS region (NL80211_DFS_*), 59 * dfs_region represents that region. Drivers can use this and the 60 * @alpha2 to adjust their device's DFS parameters as required. 61 * @user_reg_hint_type: if the @initiator was of type 62 * %NL80211_REGDOM_SET_BY_USER, this classifies the type 63 * of hint passed. This could be any of the %NL80211_USER_REG_HINT_* 64 * types. 65 * @intersect: indicates whether the wireless core should intersect 66 * the requested regulatory domain with the presently set regulatory 67 * domain. 68 * @processed: indicates whether or not this requests has already been 69 * processed. When the last request is processed it means that the 70 * currently regulatory domain set on cfg80211 is updated from 71 * CRDA and can be used by other regulatory requests. When a 72 * the last request is not yet processed we must yield until it 73 * is processed before processing any new requests. 74 * @country_ie_checksum: checksum of the last processed and accepted 75 * country IE 76 * @country_ie_env: lets us know if the AP is telling us we are outdoor, 77 * indoor, or if it doesn't matter 78 * @list: used to insert into the reg_requests_list linked list 79 */ 80 struct regulatory_request { 81 struct rcu_head rcu_head; 82 int wiphy_idx; 83 enum nl80211_reg_initiator initiator; 84 enum nl80211_user_reg_hint_type user_reg_hint_type; 85 char alpha2[3]; 86 enum nl80211_dfs_regions dfs_region; 87 bool intersect; 88 bool processed; 89 enum environment_cap country_ie_env; 90 struct list_head list; 91 }; 92 93 /** 94 * enum ieee80211_regulatory_flags - device regulatory flags 95 * 96 * @REGULATORY_CUSTOM_REG: tells us the driver for this device 97 * has its own custom regulatory domain and cannot identify the 98 * ISO / IEC 3166 alpha2 it belongs to. When this is enabled 99 * we will disregard the first regulatory hint (when the 100 * initiator is %REGDOM_SET_BY_CORE). Drivers that use 101 * wiphy_apply_custom_regulatory() should have this flag set 102 * or the regulatory core will set it for the wiphy. 103 * If you use regulatory_hint() *after* using 104 * wiphy_apply_custom_regulatory() the wireless core will 105 * clear the REGULATORY_CUSTOM_REG for your wiphy as it would be 106 * implied that the device somehow gained knowledge of its region. 107 * @REGULATORY_STRICT_REG: tells us that the wiphy for this device 108 * has regulatory domain that it wishes to be considered as the 109 * superset for regulatory rules. After this device gets its regulatory 110 * domain programmed further regulatory hints shall only be considered 111 * for this device to enhance regulatory compliance, forcing the 112 * device to only possibly use subsets of the original regulatory 113 * rules. For example if channel 13 and 14 are disabled by this 114 * device's regulatory domain no user specified regulatory hint which 115 * has these channels enabled would enable them for this wiphy, 116 * the device's original regulatory domain will be trusted as the 117 * base. You can program the superset of regulatory rules for this 118 * wiphy with regulatory_hint() for cards programmed with an 119 * ISO3166-alpha2 country code. wiphys that use regulatory_hint() 120 * will have their wiphy->regd programmed once the regulatory 121 * domain is set, and all other regulatory hints will be ignored 122 * until their own regulatory domain gets programmed. 123 * @REGULATORY_DISABLE_BEACON_HINTS: enable this if your driver needs to 124 * ensure that passive scan flags and beaconing flags may not be lifted by 125 * cfg80211 due to regulatory beacon hints. For more information on beacon 126 * hints read the documenation for regulatory_hint_found_beacon() 127 * @REGULATORY_COUNTRY_IE_FOLLOW_POWER: for devices that have a preference 128 * that even though they may have programmed their own custom power 129 * setting prior to wiphy registration, they want to ensure their channel 130 * power settings are updated for this connection with the power settings 131 * derived from the regulatory domain. The regulatory domain used will be 132 * based on the ISO3166-alpha2 from country IE provided through 133 * regulatory_hint_country_ie() 134 * @REGULATORY_COUNTRY_IE_IGNORE: for devices that have a preference to ignore 135 * all country IE information processed by the regulatory core. This will 136 * override %REGULATORY_COUNTRY_IE_FOLLOW_POWER as all country IEs will 137 * be ignored. 138 * @REGULATORY_ENABLE_RELAX_NO_IR: for devices that wish to allow the 139 * NO_IR relaxation, which enables transmissions on channels on which 140 * otherwise initiating radiation is not allowed. This will enable the 141 * relaxations enabled under the CFG80211_REG_RELAX_NO_IR configuration 142 * option 143 * @REGULATORY_WIPHY_SELF_MANAGED: for devices that employ wiphy-specific 144 * regdom management. These devices will ignore all regdom changes not 145 * originating from their own wiphy. 146 * A self-managed wiphys only employs regulatory information obtained from 147 * the FW and driver and does not use other cfg80211 sources like 148 * beacon-hints, country-code IEs and hints from other devices on the same 149 * system. Conversely, a self-managed wiphy does not share its regulatory 150 * hints with other devices in the system. If a system contains several 151 * devices, one or more of which are self-managed, there might be 152 * contradictory regulatory settings between them. Usage of flag is 153 * generally discouraged. Only use it if the FW/driver is incompatible 154 * with non-locally originated hints. 155 * This flag is incompatible with the flags: %REGULATORY_CUSTOM_REG, 156 * %REGULATORY_STRICT_REG, %REGULATORY_COUNTRY_IE_FOLLOW_POWER, 157 * %REGULATORY_COUNTRY_IE_IGNORE and %REGULATORY_DISABLE_BEACON_HINTS. 158 * Mixing any of the above flags with this flag will result in a failure 159 * to register the wiphy. This flag implies 160 * %REGULATORY_DISABLE_BEACON_HINTS and %REGULATORY_COUNTRY_IE_IGNORE. 161 */ 162 enum ieee80211_regulatory_flags { 163 REGULATORY_CUSTOM_REG = BIT(0), 164 REGULATORY_STRICT_REG = BIT(1), 165 REGULATORY_DISABLE_BEACON_HINTS = BIT(2), 166 REGULATORY_COUNTRY_IE_FOLLOW_POWER = BIT(3), 167 REGULATORY_COUNTRY_IE_IGNORE = BIT(4), 168 REGULATORY_ENABLE_RELAX_NO_IR = BIT(5), 169 /* reuse bit 6 next time */ 170 REGULATORY_WIPHY_SELF_MANAGED = BIT(7), 171 }; 172 173 struct ieee80211_freq_range { 174 u32 start_freq_khz; 175 u32 end_freq_khz; 176 u32 max_bandwidth_khz; 177 }; 178 179 struct ieee80211_power_rule { 180 u32 max_antenna_gain; 181 u32 max_eirp; 182 }; 183 184 /** 185 * struct ieee80211_wmm_ac - used to store per ac wmm regulatory limitation 186 * 187 * The information provided in this structure is required for QoS 188 * transmit queue configuration. Cf. IEEE 802.11 7.3.2.29. 189 * 190 * @cw_min: minimum contention window [a value of the form 191 * 2^n-1 in the range 1..32767] 192 * @cw_max: maximum contention window [like @cw_min] 193 * @cot: maximum burst time in units of 32 usecs, 0 meaning disabled 194 * @aifsn: arbitration interframe space [0..255] 195 * 196 */ 197 struct ieee80211_wmm_ac { 198 u16 cw_min; 199 u16 cw_max; 200 u16 cot; 201 u8 aifsn; 202 }; 203 204 struct ieee80211_wmm_rule { 205 struct ieee80211_wmm_ac client[IEEE80211_NUM_ACS]; 206 struct ieee80211_wmm_ac ap[IEEE80211_NUM_ACS]; 207 }; 208 209 struct ieee80211_reg_rule { 210 struct ieee80211_freq_range freq_range; 211 struct ieee80211_power_rule power_rule; 212 struct ieee80211_wmm_rule wmm_rule; 213 u32 flags; 214 u32 dfs_cac_ms; 215 bool has_wmm; 216 }; 217 218 struct ieee80211_regdomain { 219 struct rcu_head rcu_head; 220 u32 n_reg_rules; 221 char alpha2[3]; 222 enum nl80211_dfs_regions dfs_region; 223 struct ieee80211_reg_rule reg_rules[]; 224 }; 225 226 #define REG_RULE_EXT(start, end, bw, gain, eirp, dfs_cac, reg_flags) \ 227 { \ 228 .freq_range.start_freq_khz = MHZ_TO_KHZ(start), \ 229 .freq_range.end_freq_khz = MHZ_TO_KHZ(end), \ 230 .freq_range.max_bandwidth_khz = MHZ_TO_KHZ(bw), \ 231 .power_rule.max_antenna_gain = DBI_TO_MBI(gain), \ 232 .power_rule.max_eirp = DBM_TO_MBM(eirp), \ 233 .flags = reg_flags, \ 234 .dfs_cac_ms = dfs_cac, \ 235 } 236 237 #define REG_RULE(start, end, bw, gain, eirp, reg_flags) \ 238 REG_RULE_EXT(start, end, bw, gain, eirp, 0, reg_flags) 239 240 #endif 241