ENUM 
IEEE80211_HW_FL(9) 				  The basic mac80211 driver inte				   ENUM IEEE80211_HW_FL(9)

NAME

       enum_ieee80211_hw_flags - hardware flags

SYNOPSIS

       enum ieee80211_hw_flags {
	 IEEE80211_HW_HAS_RATE_CONTROL,
	 IEEE80211_HW_RX_INCLUDES_FCS,
	 IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING,
	 IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE,
	 IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE,
	 IEEE80211_HW_SIGNAL_UNSPEC,
	 IEEE80211_HW_SIGNAL_DBM,
	 IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC,
	 IEEE80211_HW_SPECTRUM_MGMT,
	 IEEE80211_HW_AMPDU_AGGREGATION,
	 IEEE80211_HW_SUPPORTS_PS,
	 IEEE80211_HW_PS_NULLFUNC_STACK,
	 IEEE80211_HW_SUPPORTS_DYNAMIC_PS,
	 IEEE80211_HW_MFP_CAPABLE,
	 IEEE80211_HW_WANT_MONITOR_VIF,
	 IEEE80211_HW_SUPPORTS_STATIC_SMPS,
	 IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS,
	 IEEE80211_HW_SUPPORTS_UAPSD,
	 IEEE80211_HW_REPORTS_TX_ACK_STATUS,
	 IEEE80211_HW_CONNECTION_MONITOR,
	 IEEE80211_HW_QUEUE_CONTROL,
	 IEEE80211_HW_SUPPORTS_PER_STA_GTK,
	 IEEE80211_HW_AP_LINK_PS,
	 IEEE80211_HW_TX_AMPDU_SETUP_IN_HW,
	 IEEE80211_HW_SUPPORTS_RC_TABLE,
	 IEEE80211_HW_P2P_DEV_ADDR_FOR_INTF,
	 IEEE80211_HW_TIMING_BEACON_ONLY,
	 IEEE80211_HW_SUPPORTS_HT_CCK_RATES
       };

CONSTANTS

       IEEE80211_HW_HAS_RATE_CONTROL
	   The hardware or firmware includes rate control, and cannot be controlled by the stack. As such, no rate control algorithm should be
	   instantiated, and the TX rate reported to userspace will be taken from the TX status instead of the rate control algorithm. Note that
	   this requires that the driver implement a number of callbacks so it has the correct information, it needs to have the set_rts_threshold
	   callback and must look at the BSS config use_cts_prot for G/N protection, use_short_slot for slot timing in 2.4 GHz and
	   use_short_preamble for preambles for CCK frames.

       IEEE80211_HW_RX_INCLUDES_FCS
	   Indicates that received frames passed to the stack include the FCS at the end.

       IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING
	   Some wireless LAN chipsets buffer broadcast/multicast frames for power saving stations in the hardware/firmware and others rely on the
	   host system for such buffering. This option is used to configure the IEEE 802.11 upper layer to buffer broadcast and multicast frames
	   when there are power saving stations so that the driver can fetch them with ieee80211_get_buffered_bc.

       IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE
	   Hardware is not capable of short slot operation on the 2.4 GHz band.

       IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE
	   Hardware is not capable of receiving frames with short preamble on the 2.4 GHz band.

       IEEE80211_HW_SIGNAL_UNSPEC
	   Hardware can provide signal values but we don't know its units. We expect values between 0 and max_signal. If possible please provide
	   dB or dBm instead.

       IEEE80211_HW_SIGNAL_DBM
	   Hardware gives signal values in dBm, decibel difference from one milliwatt. This is the preferred method since it is standardized
	   between different devices.  max_signal does not need to be set.

       IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC
	   This device needs to get data from beacon before association (i.e. dtim_period).

       IEEE80211_HW_SPECTRUM_MGMT
	   Hardware supports spectrum management defined in 802.11h Measurement, Channel Switch, Quieting, TPC

       IEEE80211_HW_AMPDU_AGGREGATION
	   Hardware supports 11n A-MPDU aggregation.

       IEEE80211_HW_SUPPORTS_PS
	   Hardware has power save support (i.e. can go to sleep).

       IEEE80211_HW_PS_NULLFUNC_STACK
	   Hardware requires nullfunc frame handling in stack, implies stack support for dynamic PS.

       IEEE80211_HW_SUPPORTS_DYNAMIC_PS
	   Hardware has support for dynamic PS.

       IEEE80211_HW_MFP_CAPABLE
	   Hardware supports management frame protection (MFP, IEEE 802.11w).

       IEEE80211_HW_WANT_MONITOR_VIF
	   The driver would like to be informed of a virtual monitor interface when monitor interfaces are the only active interfaces.

       IEEE80211_HW_SUPPORTS_STATIC_SMPS
	   Hardware supports static spatial multiplexing powersave, ie. can turn off all but one chain even on HT connections that should be using
	   more chains.

       IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS
	   Hardware supports dynamic spatial multiplexing powersave, ie. can turn off all but one chain and then wake the rest up as required
	   after, for example, rts/cts handshake.

       IEEE80211_HW_SUPPORTS_UAPSD
	   Hardware supports Unscheduled Automatic Power Save Delivery (U-APSD) in managed mode. The mode is configured with conf_tx operation.

       IEEE80211_HW_REPORTS_TX_ACK_STATUS
	   Hardware can provide ack status reports of Tx frames to the stack.

       IEEE80211_HW_CONNECTION_MONITOR
	   The hardware performs its own connection monitoring, including periodic keep-alives to the AP and probing the AP on beacon loss. When
	   this flag is set, signaling beacon-loss will cause an immediate change to disassociated state.

       IEEE80211_HW_QUEUE_CONTROL
	   The driver wants to control per-interface queue mapping in order to use different queues (not just one per AC) for different virtual
	   interfaces. See the doc section on HW queue control for more details.

       IEEE80211_HW_SUPPORTS_PER_STA_GTK
	   The device's crypto engine supports per-station GTKs as used by IBSS RSN or during fast transition. If the device doesn't support
	   per-station GTKs, but can be asked not to decrypt group addressed frames, then IBSS RSN support is still possible but software crypto
	   will be used. Advertise the wiphy flag only in that case.

       IEEE80211_HW_AP_LINK_PS
	   When operating in AP mode the device autonomously manages the PS status of connected stations. When this flag is set mac80211 will not
	   trigger PS mode for connected stations based on the PM bit of incoming frames. Use ieee80211_start_ps/ieee8021_end_ps to manually
	   configure the PS mode of connected stations.

       IEEE80211_HW_TX_AMPDU_SETUP_IN_HW
	   The device handles TX A-MPDU session setup strictly in HW. mac80211 should not attempt to do this in software.

       IEEE80211_HW_SUPPORTS_RC_TABLE
	   The driver supports using a rate selection table provided by the rate control algorithm.

       IEEE80211_HW_P2P_DEV_ADDR_FOR_INTF
	   Use the P2P Device address for any P2P Interface. This will be honoured even if more than one interface is supported.

       IEEE80211_HW_TIMING_BEACON_ONLY
	   Use sync timing from beacon frames only, to allow getting TBTT of a DTIM beacon.

       IEEE80211_HW_SUPPORTS_HT_CCK_RATES
	   -- undescribed --

DESCRIPTION

       These flags are used to indicate hardware capabilities to the stack. Generally, flags here should have their meaning done in a way that the
       simplest hardware doesn't need setting any particular flags. There are some exceptions to this rule, however, so you are advised to review
       these flags carefully.

AUTHOR

       Johannes Berg <johannes@sipsolutions.net>
	   Author.

COPYRIGHT

Kernel Hackers Manual 3.10					     June 2014						   ENUM IEEE80211_HW_FL(9)