include/net/regulatory.h

   1 #ifndef __NET_REGULATORY_H
   2 #define __NET_REGULATORY_H
   3 /*
   4  * regulatory support structures
   5  *
   6  * Copyright 2008-2009  Luis R. Rodriguez <lrodriguez@atheros.com>
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License version 2 as
  10  * published by the Free Software Foundation.
  11  */
  12
  13
  14 /**
  15  * enum environment_cap - Environment parsed from country IE
  16  * @ENVIRON_ANY: indicates country IE applies to both indoor and
  17  *      outdoor operation.
  18  * @ENVIRON_INDOOR: indicates country IE applies only to indoor operation
  19  * @ENVIRON_OUTDOOR: indicates country IE applies only to outdoor operation
  20  */
  21 enum environment_cap {
  22         ENVIRON_ANY,
  23         ENVIRON_INDOOR,
  24         ENVIRON_OUTDOOR,
  25 };
  26
  27 /**
  28  * struct regulatory_request - used to keep track of regulatory requests
  29  *
  30  * @wiphy_idx: this is set if this request's initiator is
  31  *      %REGDOM_SET_BY_COUNTRY_IE or %REGDOM_SET_BY_DRIVER. This
  32  *      can be used by the wireless core to deal with conflicts
  33  *      and potentially inform users of which devices specifically
  34  *      cased the conflicts.
  35  * @initiator: indicates who sent this request, could be any of
  36  *      of those set in nl80211_reg_initiator (%NL80211_REGDOM_SET_BY_*)
  37  * @alpha2: the ISO / IEC 3166 alpha2 country code of the requested
  38  *      regulatory domain. We have a few special codes:
  39  *      00 - World regulatory domain
  40  *      99 - built by driver but a specific alpha2 cannot be determined
  41  *      98 - result of an intersection between two regulatory domains
  42  *      97 - regulatory domain has not yet been configured
  43  * @intersect: indicates whether the wireless core should intersect
  44  *      the requested regulatory domain with the presently set regulatory
  45  *      domain.
  46  * @processed: indicates whether or not this requests has already been
  47  *      processed. When the last request is processed it means that the
  48  *      currently regulatory domain set on cfg80211 is updated from
  49  *      CRDA and can be used by other regulatory requests. When a
  50  *      the last request is not yet processed we must yield until it
  51  *      is processed before processing any new requests.
  52  * @country_ie_checksum: checksum of the last processed and accepted
  53  *      country IE
  54  * @country_ie_env: lets us know if the AP is telling us we are outdoor,
  55  *      indoor, or if it doesn't matter
  56  * @list: used to insert into the reg_requests_list linked list
  57  */
  58 struct regulatory_request {
  59         int wiphy_idx;
  60         enum nl80211_reg_initiator initiator;
  61         char alpha2[2];
  62         bool intersect;
  63         bool processed;
  64         enum environment_cap country_ie_env;
  65         struct list_head list;
  66 };
  67
  68 struct ieee80211_freq_range {
  69         u32 start_freq_khz;
  70         u32 end_freq_khz;
  71         u32 max_bandwidth_khz;
  72 };
  73
  74 struct ieee80211_power_rule {
  75         u32 max_antenna_gain;
  76         u32 max_eirp;
  77 };
  78
  79 struct ieee80211_reg_rule {
  80         struct ieee80211_freq_range freq_range;
  81         struct ieee80211_power_rule power_rule;
  82         u32 flags;
  83 };
  84
  85 struct ieee80211_regdomain {
  86         u32 n_reg_rules;
  87         char alpha2[2];
  88         struct ieee80211_reg_rule reg_rules[];
  89 };
  90
  91 #define MHZ_TO_KHZ(freq) ((freq) * 1000)
  92 #define KHZ_TO_MHZ(freq) ((freq) / 1000)
  93 #define DBI_TO_MBI(gain) ((gain) * 100)
  94 #define MBI_TO_DBI(gain) ((gain) / 100)
  95 #define DBM_TO_MBM(gain) ((gain) * 100)
  96 #define MBM_TO_DBM(gain) ((gain) / 100)
  97
  98 #define REG_RULE(start, end, bw, gain, eirp, reg_flags) \
  99 {                                                       \
 100         .freq_range.start_freq_khz = MHZ_TO_KHZ(start), \
 101         .freq_range.end_freq_khz = MHZ_TO_KHZ(end),     \
 102         .freq_range.max_bandwidth_khz = MHZ_TO_KHZ(bw), \
 103         .power_rule.max_antenna_gain = DBI_TO_MBI(gain),\
 104         .power_rule.max_eirp = DBM_TO_MBM(eirp),        \
 105         .flags = reg_flags,                             \
 106 }
 107
 108 #endif