LXR linux/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 <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 */
  30enum 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 */
  76struct 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
  89struct ieee80211_freq_range {
  90        u32 start_freq_khz;
  91        u32 end_freq_khz;
  92        u32 max_bandwidth_khz;
  93};
  94
  95struct ieee80211_power_rule {
  96        u32 max_antenna_gain;
  97        u32 max_eirp;
  98};
  99
 100struct ieee80211_reg_rule {
 101        struct ieee80211_freq_range freq_range;
 102        struct ieee80211_power_rule power_rule;
 103        u32 flags;
 104};
 105
 106struct 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