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linux/include/net/regulatory.h
Haim Dreyfuss 230ebaa189 cfg80211: read wmm rules from regulatory database 
ETSI EN 301 893 v2.1.1 (2017-05) standard defines a new channel access
mechanism that all devices (WLAN and LAA) need to comply with.
The regulatory database can now be loaded into the kernel and also
has the option to load optional data.
In order to be able to comply with ETSI standard, we add wmm_rule into
regulatory rule and add the option to read its value from the regulatory
database.

Signed-off-by: Haim Dreyfuss <haim.dreyfuss@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
[johannes: fix memory leak in error path]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2018-03-29 11:11:40 +02:00

256 lines
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C
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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/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[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;
};
struct ieee80211_regdomain {
struct rcu_head rcu_head;
u32 n_reg_rules;
u32 n_wmm_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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