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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: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Johannes Berg 2017-02-15 15:02:09 +01:00
parent 0c1eca4e2f
commit 7f406cd16a
2 changed files with 15 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
net/mac80211/sta_info.c
View File

@ -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)

13
net/mac80211/sta_info.h
View File

@ -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;
}