Release 4.7 include/net/regulatory.h
#ifndef __NET_REGULATORY_H
#define __NET_REGULATORY_H
/*
* regulatory support structures
*
* Copyright 2008-2009 Luis R. Rodriguez <mcgrof@qca.qualcomm.com>
*
* 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/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
* 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[2];
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_reg_rule {
struct ieee80211_freq_range freq_range;
struct ieee80211_power_rule power_rule;
u32 flags;
u32 dfs_cac_ms;
};
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 MHZ_TO_KHZ(freq) ((freq) * 1000)
#define KHZ_TO_MHZ(freq) ((freq) / 1000)
#define DBI_TO_MBI(gain) ((gain) * 100)
#define MBI_TO_DBI(gain) ((gain) / 100)
#define DBM_TO_MBM(gain) ((gain) * 100)
#define MBM_TO_DBM(gain) ((gain) / 100)
#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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