1 #ifndef __NET_REGULATORY_H 2 #define __NET_REGULATORY_H 3 /* 4 * regulatory support structures 5 * 6 * Copyright 2008-2009 Luis R. Rodriguez <mcgrof@qca.qualcomm.com> 7 * 8 * Permission to use, copy, modify, and/or distribute this software for any 9 * purpose with or without fee is hereby granted, provided that the above 10 * copyright notice and this permission notice appear in all copies. 11 * 12 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 13 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 14 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 15 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 16 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 17 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 18 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 19 */ 20 21 #include <linux/rcupdate.h> 22 23 /** 24 * enum environment_cap - Environment parsed from country IE 25 * @ENVIRON_ANY: indicates country IE applies to both indoor and 26 * outdoor operation. 27 * @ENVIRON_INDOOR: indicates country IE applies only to indoor operation 28 * @ENVIRON_OUTDOOR: indicates country IE applies only to outdoor operation 29 */ 30 enum environment_cap { 31 ENVIRON_ANY, 32 ENVIRON_INDOOR, 33 ENVIRON_OUTDOOR, 34 }; 35 36 /** 37 * struct regulatory_request - used to keep track of regulatory requests 38 * 39 * @rcu_head: RCU head struct used to free the request 40 * @wiphy_idx: this is set if this request's initiator is 41 * %REGDOM_SET_BY_COUNTRY_IE or %REGDOM_SET_BY_DRIVER. This 42 * can be used by the wireless core to deal with conflicts 43 * and potentially inform users of which devices specifically 44 * cased the conflicts. 45 * @initiator: indicates who sent this request, could be any of 46 * of those set in nl80211_reg_initiator (%NL80211_REGDOM_SET_BY_*) 47 * @alpha2: the ISO / IEC 3166 alpha2 country code of the requested 48 * regulatory domain. We have a few special codes: 49 * 00 - World regulatory domain 50 * 99 - built by driver but a specific alpha2 cannot be determined 51 * 98 - result of an intersection between two regulatory domains 52 * 97 - regulatory domain has not yet been configured 53 * @dfs_region: If CRDA responded with a regulatory domain that requires 54 * DFS master operation on a known DFS region (NL80211_DFS_*), 55 * dfs_region represents that region. Drivers can use this and the 56 * @alpha2 to adjust their device's DFS parameters as required. 57 * @user_reg_hint_type: if the @initiator was of type 58 * %NL80211_REGDOM_SET_BY_USER, this classifies the type 59 * of hint passed. This could be any of the %NL80211_USER_REG_HINT_* 60 * types. 61 * @intersect: indicates whether the wireless core should intersect 62 * the requested regulatory domain with the presently set regulatory 63 * domain. 64 * @processed: indicates whether or not this requests has already been 65 * processed. When the last request is processed it means that the 66 * currently regulatory domain set on cfg80211 is updated from 67 * CRDA and can be used by other regulatory requests. When a 68 * the last request is not yet processed we must yield until it 69 * is processed before processing any new requests. 70 * @country_ie_checksum: checksum of the last processed and accepted 71 * country IE 72 * @country_ie_env: lets us know if the AP is telling us we are outdoor, 73 * indoor, or if it doesn't matter 74 * @list: used to insert into the reg_requests_list linked list 75 */ 76 struct regulatory_request { 77 struct rcu_head rcu_head; 78 int wiphy_idx; 79 enum nl80211_reg_initiator initiator; 80 enum nl80211_user_reg_hint_type user_reg_hint_type; 81 char alpha2[2]; 82 u8 dfs_region; 83 bool intersect; 84 bool processed; 85 enum environment_cap country_ie_env; 86 struct list_head list; 87 }; 88 89 struct ieee80211_freq_range { 90 u32 start_freq_khz; 91 u32 end_freq_khz; 92 u32 max_bandwidth_khz; 93 }; 94 95 struct ieee80211_power_rule { 96 u32 max_antenna_gain; 97 u32 max_eirp; 98 }; 99 100 struct ieee80211_reg_rule { 101 struct ieee80211_freq_range freq_range; 102 struct ieee80211_power_rule power_rule; 103 u32 flags; 104 }; 105 106 struct ieee80211_regdomain { 107 struct rcu_head rcu_head; 108 u32 n_reg_rules; 109 char alpha2[2]; 110 u8 dfs_region; 111 struct ieee80211_reg_rule reg_rules[]; 112 }; 113 114 #define MHZ_TO_KHZ(freq) ((freq) * 1000) 115 #define KHZ_TO_MHZ(freq) ((freq) / 1000) 116 #define DBI_TO_MBI(gain) ((gain) * 100) 117 #define MBI_TO_DBI(gain) ((gain) / 100) 118 #define DBM_TO_MBM(gain) ((gain) * 100) 119 #define MBM_TO_DBM(gain) ((gain) / 100) 120 121 #define REG_RULE(start, end, bw, gain, eirp, reg_flags) \ 122 { \ 123 .freq_range.start_freq_khz = MHZ_TO_KHZ(start), \ 124 .freq_range.end_freq_khz = MHZ_TO_KHZ(end), \ 125 .freq_range.max_bandwidth_khz = MHZ_TO_KHZ(bw), \ 126 .power_rule.max_antenna_gain = DBI_TO_MBI(gain),\ 127 .power_rule.max_eirp = DBM_TO_MBM(eirp), \ 128 .flags = reg_flags, \ 129 } 130 131 #endif 132