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mac80211: minstrel: Enable STBC and LDPC for VHT Rates

Browse source 
If peer support reception of STBC and LDPC, enable them for better
performance.

Signed-off-by: Chaitanya TK <[email protected]>
Signed-off-by: Felix Fietkau <[email protected]>
Signed-off-by: Johannes Berg <[email protected]>
This commit is contained in:
Chaitanya T K 2018-10-06 19:34:59 +02:00 • committed by Johannes Berg
commit f458e832ba
2 changed files with 16 additions and 8 deletions
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23
net/mac80211/rc80211_minstrel_ht.c
View file

@ -1130,7 +1130,7 @@ minstrel_ht_update_caps(void *priv, struct ieee80211_supported_band *sband,
struct minstrel_ht_sta_priv *msp = priv_sta;
struct minstrel_ht_sta *mi = &msp->ht;
struct ieee80211_mcs_info *mcs = &sta->ht_cap.mcs;
u16 sta_cap = sta->ht_cap.cap;
u16 ht_cap = sta->ht_cap.cap;
struct ieee80211_sta_vht_cap *vht_cap = &sta->vht_cap;
struct sta_info *sinfo = container_of(sta, struct sta_info, sta);
int use_vht;
@ -1138,6 +1138,7 @@ minstrel_ht_update_caps(void *priv, struct ieee80211_supported_band *sband,
int ack_dur;
int stbc;
int i;
bool ldpc;
/* fall back to the old minstrel for legacy stations */
if (!sta->ht_cap.ht_supported)
@ -1175,16 +1176,22 @@ minstrel_ht_update_caps(void *priv, struct ieee80211_supported_band *sband,
}
mi->sample_tries = 4;
/* TODO tx_flags for vht - ATM the RC API is not fine-grained enough */
if (!use_vht) {
stbc = (sta_cap & IEEE80211_HT_CAP_RX_STBC) >>
stbc = (ht_cap & IEEE80211_HT_CAP_RX_STBC) >>
IEEE80211_HT_CAP_RX_STBC_SHIFT;
mi->tx_flags |= stbc << IEEE80211_TX_CTL_STBC_SHIFT;
if (sta_cap & IEEE80211_HT_CAP_LDPC_CODING)
mi->tx_flags |= IEEE80211_TX_CTL_LDPC;
ldpc = ht_cap & IEEE80211_HT_CAP_LDPC_CODING;
} else {
stbc = (vht_cap->cap & IEEE80211_VHT_CAP_RXSTBC_MASK) >>
IEEE80211_VHT_CAP_RXSTBC_SHIFT;
ldpc = vht_cap->cap & IEEE80211_VHT_CAP_RXLDPC;
}
mi->tx_flags |= stbc << IEEE80211_TX_CTL_STBC_SHIFT;
if (ldpc)
mi->tx_flags |= IEEE80211_TX_CTL_LDPC;
for (i = 0; i < ARRAY_SIZE(mi->groups); i++) {
u32 gflags = minstrel_mcs_groups[i].flags;
int bw, nss;
@ -1197,10 +1204,10 @@ minstrel_ht_update_caps(void *priv, struct ieee80211_supported_band *sband,
if (gflags & IEEE80211_TX_RC_SHORT_GI) {
if (gflags & IEEE80211_TX_RC_40_MHZ_WIDTH) {
if (!(sta_cap & IEEE80211_HT_CAP_SGI_40))
if (!(ht_cap & IEEE80211_HT_CAP_SGI_40))
continue;
} else {
if (!(sta_cap & IEEE80211_HT_CAP_SGI_20))
if (!(ht_cap & IEEE80211_HT_CAP_SGI_20))
continue;
}
}