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Commit fe8431f8 authored by Felix Fietkau's avatar Felix Fietkau Committed by John W. Linville
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mac80211: add an rx flag for ignoring a packet's signal strength 



For A-MPDU rx it makes sense to only process the signal strength once per
aggregate instead of once per subframe. Additonally, some hardware (e.g.
Atheros) only provides valid signal strength information for the last
subframe.

Signed-off-by: default avatarFelix Fietkau <nbd@openwrt.org>
Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
parent c04a4ff7

include/net/mac80211.h

+3 −0
Original line number Diff line number Diff line
@@ -659,6 +659,8 @@ ieee80211_tx_info_clear_status(struct ieee80211_tx_info *info) 
 * @RX_FLAG_HT: HT MCS was used and rate_idx is MCS index

 * @RX_FLAG_40MHZ: HT40 (40 MHz) was used

 * @RX_FLAG_SHORT_GI: Short guard interval was used

 * @RX_FLAG_NO_SIGNAL_VAL: The signal strength value is not present.

 *	Valid only for data frames (mainly A-MPDU)

 */

enum mac80211_rx_flags {

	RX_FLAG_MMIC_ERROR	= 1<<0,
@@ -672,6 +674,7 @@ enum mac80211_rx_flags { 
	RX_FLAG_HT		= 1<<9,

	RX_FLAG_40MHZ		= 1<<10,

	RX_FLAG_SHORT_GI	= 1<<11,

	RX_FLAG_NO_SIGNAL_VAL	= 1<<12,

};



/**

net/mac80211/rx.c

+6 −3
Original line number Diff line number Diff line
@@ -177,7 +177,8 @@ ieee80211_add_rx_radiotap_header(struct ieee80211_local *local, 
	pos += 2;



	/* IEEE80211_RADIOTAP_DBM_ANTSIGNAL */

	if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM) {

	if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM &&

	    !(status->flag & RX_FLAG_NO_SIGNAL_VAL)) {

		*pos = status->signal;

		rthdr->it_present |=

			cpu_to_le32(1 << IEEE80211_RADIOTAP_DBM_ANTSIGNAL);
@@ -1309,8 +1310,10 @@ ieee80211_rx_h_sta_process(struct ieee80211_rx_data *rx) 


	sta->rx_fragments++;

	sta->rx_bytes += rx->skb->len;

	if (!(status->flag & RX_FLAG_NO_SIGNAL_VAL)) {

		sta->last_signal = status->signal;

		ewma_add(&sta->avg_signal, -status->signal);

	}



	/*

	 * Change STA power saving mode only at the end of a frame