Commit 7f406cd1 authored by Johannes Berg's avatar Johannes Berg
Browse files

mac80211: encode rate type (legacy, HT, VHT) with fewer bits 



We don't really need three different bits for each, since the
types are mutually exclusive. Use just two bits for it.

Signed-off-by: default avatarJohannes Berg <johannes.berg@intel.com>
parent 0c1eca4e

net/mac80211/sta_info.c

+8 −3
Original line number Diff line number Diff line
@@ -1960,14 +1960,17 @@ static void sta_stats_decode_rate(struct ieee80211_local *local, u16 rate, 
	rinfo->bw = (rate & STA_STATS_RATE_BW_MASK) >>

		STA_STATS_RATE_BW_SHIFT;



	if (rate & STA_STATS_RATE_VHT) {

	switch (rate & STA_STATS_RATE_TYPE_MASK) {

	case STA_STATS_RATE_TYPE_VHT:

		rinfo->flags = RATE_INFO_FLAGS_VHT_MCS;

		rinfo->mcs = rate & 0xf;

		rinfo->nss = (rate & 0xf0) >> 4;

	} else if (rate & STA_STATS_RATE_HT) {

		break;

	case STA_STATS_RATE_TYPE_HT:

		rinfo->flags = RATE_INFO_FLAGS_MCS;

		rinfo->mcs = rate & 0xff;

	} else if (rate & STA_STATS_RATE_LEGACY) {

		break;

	case STA_STATS_RATE_TYPE_LEGACY: {

		struct ieee80211_supported_band *sband;

		u16 brate;

		unsigned int shift;
@@ -1982,6 +1985,8 @@ static void sta_stats_decode_rate(struct ieee80211_local *local, u16 rate, 
		else

			shift = 0;

		rinfo->legacy = DIV_ROUND_UP(brate, 1 << shift);

		break;

		}

	}



	if (rate & STA_STATS_RATE_SGI)

net/mac80211/sta_info.h

+7 −6
Original line number Diff line number Diff line
@@ -728,9 +728,10 @@ void ieee80211_sta_ps_deliver_uapsd(struct sta_info *sta); 
unsigned long ieee80211_sta_last_active(struct sta_info *sta);



#define STA_STATS_RATE_INVALID		0

#define STA_STATS_RATE_VHT		0x8000

#define STA_STATS_RATE_HT		0x4000

#define STA_STATS_RATE_LEGACY		0x2000

#define STA_STATS_RATE_TYPE_MASK	0xC000

#define STA_STATS_RATE_TYPE_LEGACY	0x4000

#define STA_STATS_RATE_TYPE_HT		0x8000

#define STA_STATS_RATE_TYPE_VHT		0xC000

#define STA_STATS_RATE_SGI		0x1000

#define STA_STATS_RATE_BW_SHIFT		9

#define STA_STATS_RATE_BW_MASK		(0x7 << STA_STATS_RATE_BW_SHIFT)
@@ -756,11 +757,11 @@ static inline u16 sta_stats_encode_rate(struct ieee80211_rx_status *s) 
		r |= STA_STATS_RATE_SGI;



	if (s->flag & RX_FLAG_VHT)

		r |= STA_STATS_RATE_VHT | (s->vht_nss << 4);

		r |= STA_STATS_RATE_TYPE_VHT | (s->vht_nss << 4);

	else if (s->flag & RX_FLAG_HT)

		r |= STA_STATS_RATE_HT;

		r |= STA_STATS_RATE_TYPE_HT;

	else

		r |= STA_STATS_RATE_LEGACY | (s->band << 4);

		r |= STA_STATS_RATE_TYPE_LEGACY | (s->band << 4);



	return r;

}

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