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ieee80211_sta_set_buffered(9) [centos man page]

IEEE80211_STA_SET_BU(9) 				     Advanced driver interface					   IEEE80211_STA_SET_BU(9)

NAME
ieee80211_sta_set_buffered - inform mac80211 about driver-buffered frames SYNOPSIS
void ieee80211_sta_set_buffered(struct ieee80211_sta * sta, u8 tid, bool buffered); ARGUMENTS
sta struct ieee80211_sta pointer for the sleeping station tid the TID that has buffered frames buffered indicates whether or not frames are buffered for this TID DESCRIPTION
If a driver buffers frames for a powersave station instead of passing them back to mac80211 for retransmission, the station may still need to be told that there are buffered frames via the TIM bit. This function informs mac80211 whether or not there are frames that are buffered in the driver for a given TID; mac80211 can then use this data to set the TIM bit (NOTE: This may call back into the driver's set_tim call! Beware of the locking!) If all frames are released to the station (due to PS-poll or uAPSD) then the driver needs to inform mac80211 that there no longer are frames buffered. However, when the station wakes up mac80211 assumes that all buffered frames will be transmitted and clears this data, drivers need to make sure they inform mac80211 about all buffered frames on the sleep transition (sta_notify with STA_NOTIFY_SLEEP). Note that technically mac80211 only needs to know this per AC, not per TID, but since driver buffering will inevitably happen per TID (since it is related to aggregation) it is easier to make mac80211 map the TID to the AC as required instead of keeping track in all drivers that use this API. AUTHOR
Johannes Berg <johannes@sipsolutions.net> Author. COPYRIGHT
Kernel Hackers Manual 3.10 June 2014 IEEE80211_STA_SET_BU(9)

Check Out this Related Man Page

ENUM 
IEEE80211_FILTE(9) The basic mac80211 driver inte ENUM IEEE80211_FILTE(9) NAME
enum_ieee80211_filter_flags - hardware filter flags SYNOPSIS
enum ieee80211_filter_flags { FIF_PROMISC_IN_BSS, FIF_ALLMULTI, FIF_FCSFAIL, FIF_PLCPFAIL, FIF_BCN_PRBRESP_PROMISC, FIF_CONTROL, FIF_OTHER_BSS, FIF_PSPOLL }; CONSTANTS
FIF_PROMISC_IN_BSS promiscuous mode within your BSS, think of the BSS as your network segment and then this corresponds to the regular ethernet device promiscuous mode. FIF_ALLMULTI pass all multicast frames, this is used if requested by the user or if the hardware is not capable of filtering by multicast address. FIF_FCSFAIL pass frames with failed FCS (but you need to set the RX_FLAG_FAILED_FCS_CRC for them) FIF_PLCPFAIL pass frames with failed PLCP CRC (but you need to set the RX_FLAG_FAILED_PLCP_CRC for them FIF_BCN_PRBRESP_PROMISC This flag is set during scanning to indicate to the hardware that it should not filter beacons or probe responses by BSSID. Filtering them can greatly reduce the amount of processing mac80211 needs to do and the amount of CPU wakeups, so you should honour this flag if possible. FIF_CONTROL pass control frames (except for PS Poll), if PROMISC_IN_BSS is not set then only those addressed to this station. FIF_OTHER_BSS pass frames destined to other BSSes FIF_PSPOLL pass PS Poll frames, if PROMISC_IN_BSS is not set then only those addressed to this station. FRAME FILTERING
These flags determine what the filter in hardware should be programmed to let through and what should not be passed to the stack. It is always safe to pass more frames than requested, but this has negative impact on power consumption. AUTHOR
Johannes Berg <johannes@sipsolutions.net> Author. COPYRIGHT
Kernel Hackers Manual 2.6. July 2010 ENUM IEEE80211_FILTE(9)
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