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TOMOYO Linux Cross Reference
Linux/include/net/regulatory.h

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  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 

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