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 #ifndef __NET_REGULATORY_H
 #define __NET_REGULATORY_H
 /*
  * regulatory support structures
  *
  * Copyright 2008-2009  Luis R. Rodriguez <mcgrof@qca.qualcomm.com>
  * Copyright (C) 2018 Intel Corporation
  *
  * Permission to use, copy, modify, and/or distribute this software for any
  * purpose with or without fee is hereby granted, provided that the above
  * copyright notice and this permission notice appear in all copies.
  *
  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  */
 
 #include <linux/ieee80211.h>
 #include <linux/nl80211.h>
 #include <linux/rcupdate.h>
 
 /**
  * enum environment_cap - Environment parsed from country IE
  * @ENVIRON_ANY: indicates country IE applies to both indoor and
  *  outdoor operation.
  * @ENVIRON_INDOOR: indicates country IE applies only to indoor operation
  * @ENVIRON_OUTDOOR: indicates country IE applies only to outdoor operation
  */
 enum environment_cap {
     ENVIRON_ANY,
     ENVIRON_INDOOR,
     ENVIRON_OUTDOOR,
 };
 
 /**
  * struct regulatory_request - used to keep track of regulatory requests
  *
  * @rcu_head: RCU head struct used to free the request
  * @wiphy_idx: this is set if this request's initiator is
  *  %REGDOM_SET_BY_COUNTRY_IE or %REGDOM_SET_BY_DRIVER. This
  *  can be used by the wireless core to deal with conflicts
  *  and potentially inform users of which devices specifically
  *  cased the conflicts.
  * @initiator: indicates who sent this request, could be any of
  *  those set in nl80211_reg_initiator (%NL80211_REGDOM_SET_BY_*)
  * @alpha2: the ISO / IEC 3166 alpha2 country code of the requested
  *  regulatory domain. We have a few special codes:
  *  00 - World regulatory domain
  *  99 - built by driver but a specific alpha2 cannot be determined
  *  98 - result of an intersection between two regulatory domains
  *  97 - regulatory domain has not yet been configured
  * @dfs_region: If CRDA responded with a regulatory domain that requires
  *  DFS master operation on a known DFS region (NL80211_DFS_*),
  *  dfs_region represents that region. Drivers can use this and the
  *  @alpha2 to adjust their device's DFS parameters as required.
  * @user_reg_hint_type: if the @initiator was of type
  *  %NL80211_REGDOM_SET_BY_USER, this classifies the type
  *  of hint passed. This could be any of the %NL80211_USER_REG_HINT_*
  *  types.
  * @intersect: indicates whether the wireless core should intersect
  *  the requested regulatory domain with the presently set regulatory
  *  domain.
  * @processed: indicates whether or not this requests has already been
  *  processed. When the last request is processed it means that the
  *  currently regulatory domain set on cfg80211 is updated from
  *  CRDA and can be used by other regulatory requests. When a
  *  the last request is not yet processed we must yield until it
  *  is processed before processing any new requests.
  * @country_ie_checksum: checksum of the last processed and accepted
  *  country IE
  * @country_ie_env: lets us know if the AP is telling us we are outdoor,
  *  indoor, or if it doesn't matter
  * @list: used to insert into the reg_requests_list linked list
  */
 struct regulatory_request {
     struct rcu_head rcu_head;
     int wiphy_idx;
     enum nl80211_reg_initiator initiator;
     enum nl80211_user_reg_hint_type user_reg_hint_type;
     char alpha2[3];
     enum nl80211_dfs_regions dfs_region;
     bool intersect;
     bool processed;
     enum environment_cap country_ie_env;
     struct list_head list;
 };
 
 /**
  * enum ieee80211_regulatory_flags - device regulatory flags
  *
  * @REGULATORY_CUSTOM_REG: tells us the driver for this device
  *  has its own custom regulatory domain and cannot identify the
  *  ISO / IEC 3166 alpha2 it belongs to. When this is enabled
  *  we will disregard the first regulatory hint (when the
  *  initiator is %REGDOM_SET_BY_CORE). Drivers that use
  *  wiphy_apply_custom_regulatory() should have this flag set
  *  or the regulatory core will set it for the wiphy.
  *  If you use regulatory_hint() *after* using
  *  wiphy_apply_custom_regulatory() the wireless core will
  *  clear the REGULATORY_CUSTOM_REG for your wiphy as it would be
  *  implied that the device somehow gained knowledge of its region.
  * @REGULATORY_STRICT_REG: tells us that the wiphy for this device
  *  has regulatory domain that it wishes to be considered as the
  *  superset for regulatory rules. After this device gets its regulatory
  *  domain programmed further regulatory hints shall only be considered
  *  for this device to enhance regulatory compliance, forcing the
  *  device to only possibly use subsets of the original regulatory
  *  rules. For example if channel 13 and 14 are disabled by this
  *  device's regulatory domain no user specified regulatory hint which
  *  has these channels enabled would enable them for this wiphy,
  *  the device's original regulatory domain will be trusted as the
  *  base. You can program the superset of regulatory rules for this
  *  wiphy with regulatory_hint() for cards programmed with an
  *  ISO3166-alpha2 country code. wiphys that use regulatory_hint()
  *  will have their wiphy->regd programmed once the regulatory
  *  domain is set, and all other regulatory hints will be ignored
  *  until their own regulatory domain gets programmed.
  * @REGULATORY_DISABLE_BEACON_HINTS: enable this if your driver needs to
  *  ensure that passive scan flags and beaconing flags may not be lifted by
  *  cfg80211 due to regulatory beacon hints. For more information on beacon
  *  hints read the documenation for regulatory_hint_found_beacon()
  * @REGULATORY_COUNTRY_IE_FOLLOW_POWER:  for devices that have a preference
  *  that even though they may have programmed their own custom power
  *  setting prior to wiphy registration, they want to ensure their channel
  *  power settings are updated for this connection with the power settings
  *  derived from the regulatory domain. The regulatory domain used will be
  *  based on the ISO3166-alpha2 from country IE provided through
  *  regulatory_hint_country_ie()
  * @REGULATORY_COUNTRY_IE_IGNORE: for devices that have a preference to ignore
  *  all country IE information processed by the regulatory core. This will
  *  override %REGULATORY_COUNTRY_IE_FOLLOW_POWER as all country IEs will
  *  be ignored.
  * @REGULATORY_ENABLE_RELAX_NO_IR: for devices that wish to allow the
  *      NO_IR relaxation, which enables transmissions on channels on which
  *      otherwise initiating radiation is not allowed. This will enable the
  *      relaxations enabled under the CFG80211_REG_RELAX_NO_IR configuration
  *      option
  * @REGULATORY_IGNORE_STALE_KICKOFF: the regulatory core will _not_ make sure
  *  all interfaces on this wiphy reside on allowed channels. If this flag
  *  is not set, upon a regdomain change, the interfaces are given a grace
  *  period (currently 60 seconds) to disconnect or move to an allowed
  *  channel. Interfaces on forbidden channels are forcibly disconnected.
  *  Currently these types of interfaces are supported for enforcement:
  *  NL80211_IFTYPE_ADHOC, NL80211_IFTYPE_STATION, NL80211_IFTYPE_AP,
  *  NL80211_IFTYPE_AP_VLAN, NL80211_IFTYPE_MONITOR,
  *  NL80211_IFTYPE_P2P_CLIENT, NL80211_IFTYPE_P2P_GO,
  *  NL80211_IFTYPE_P2P_DEVICE. The flag will be set by default if a device
  *  includes any modes unsupported for enforcement checking.
  * @REGULATORY_WIPHY_SELF_MANAGED: for devices that employ wiphy-specific
  *  regdom management. These devices will ignore all regdom changes not
  *  originating from their own wiphy.
  *  A self-managed wiphys only employs regulatory information obtained from
  *  the FW and driver and does not use other cfg80211 sources like
  *  beacon-hints, country-code IEs and hints from other devices on the same
  *  system. Conversely, a self-managed wiphy does not share its regulatory
  *  hints with other devices in the system. If a system contains several
  *  devices, one or more of which are self-managed, there might be
  *  contradictory regulatory settings between them. Usage of flag is
  *  generally discouraged. Only use it if the FW/driver is incompatible
  *  with non-locally originated hints.
  *  This flag is incompatible with the flags: %REGULATORY_CUSTOM_REG,
  *  %REGULATORY_STRICT_REG, %REGULATORY_COUNTRY_IE_FOLLOW_POWER,
  *  %REGULATORY_COUNTRY_IE_IGNORE and %REGULATORY_DISABLE_BEACON_HINTS.
  *  Mixing any of the above flags with this flag will result in a failure
  *  to register the wiphy. This flag implies
  *  %REGULATORY_DISABLE_BEACON_HINTS and %REGULATORY_COUNTRY_IE_IGNORE.
  */
 enum ieee80211_regulatory_flags {
     REGULATORY_CUSTOM_REG           = BIT(0),
     REGULATORY_STRICT_REG           = BIT(1),
     REGULATORY_DISABLE_BEACON_HINTS     = BIT(2),
     REGULATORY_COUNTRY_IE_FOLLOW_POWER  = BIT(3),
     REGULATORY_COUNTRY_IE_IGNORE        = BIT(4),
     REGULATORY_ENABLE_RELAX_NO_IR           = BIT(5),
     REGULATORY_IGNORE_STALE_KICKOFF         = BIT(6),
     REGULATORY_WIPHY_SELF_MANAGED       = BIT(7),
 };
 
 struct ieee80211_freq_range {
     u32 start_freq_khz;
     u32 end_freq_khz;
     u32 max_bandwidth_khz;
 };
 
 struct ieee80211_power_rule {
     u32 max_antenna_gain;
     u32 max_eirp;
 };
 
 /**
  * struct ieee80211_wmm_ac - used to store per ac wmm regulatory limitation
  *
  * The information provided in this structure is required for QoS
  * transmit queue configuration. Cf. IEEE 802.11 7.3.2.29.
  *
  * @cw_min: minimum contention window [a value of the form
  *      2^n-1 in the range 1..32767]
  * @cw_max: maximum contention window [like @cw_min]
  * @cot: maximum burst time in units of 32 usecs, 0 meaning disabled
  * @aifsn: arbitration interframe space [0..255]
  *
  */
 struct ieee80211_wmm_ac {
     u16 cw_min;
     u16 cw_max;
     u16 cot;
     u8 aifsn;
 };
 
 struct ieee80211_wmm_rule {
     struct ieee80211_wmm_ac client[IEEE80211_NUM_ACS];
     struct ieee80211_wmm_ac ap[IEEE80211_NUM_ACS];
 };
 
 struct ieee80211_reg_rule {
     struct ieee80211_freq_range freq_range;
     struct ieee80211_power_rule power_rule;
     struct ieee80211_wmm_rule wmm_rule;
     u32 flags;
     u32 dfs_cac_ms;
     bool has_wmm;
 };
 
 struct ieee80211_regdomain {
     struct rcu_head rcu_head;
     u32 n_reg_rules;
     char alpha2[3];
     enum nl80211_dfs_regions dfs_region;
     struct ieee80211_reg_rule reg_rules[];
 };
 
 #define REG_RULE_EXT(start, end, bw, gain, eirp, dfs_cac, reg_flags)    \
 {                                   \
     .freq_range.start_freq_khz = MHZ_TO_KHZ(start),         \
     .freq_range.end_freq_khz = MHZ_TO_KHZ(end),         \
     .freq_range.max_bandwidth_khz = MHZ_TO_KHZ(bw),         \
     .power_rule.max_antenna_gain = DBI_TO_MBI(gain),        \
     .power_rule.max_eirp = DBM_TO_MBM(eirp),            \
     .flags = reg_flags,                     \
     .dfs_cac_ms = dfs_cac,                      \
 }
 
 #define REG_RULE(start, end, bw, gain, eirp, reg_flags) \
     REG_RULE_EXT(start, end, bw, gain, eirp, 0, reg_flags)
 
 #endif

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