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authorChaitanya T K <chaitanya.mgit@gmail.com>2018-10-06 19:34:59 +0200
committerJohannes Berg <johannes.berg@intel.com>2018-10-11 16:01:00 +0200
commitf458e832ba510f843807fc2c2906a8fb59554c9f (patch)
tree546054ca7c2a45512402bfdcc38adf7d055733e1
parent42dca5ef24fc846ff133796980e21e5788ddfb70 (diff)
mac80211: minstrel: Enable STBC and LDPC for VHT Rates
If peer support reception of STBC and LDPC, enable them for better performance. Signed-off-by: Chaitanya TK <chaitanya.mgit@gmail.com> Signed-off-by: Felix Fietkau <nbd@nbd.name> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
-rw-r--r--include/linux/ieee80211.h1
-rw-r--r--net/mac80211/rc80211_minstrel_ht.c23
2 files changed, 16 insertions, 8 deletions
diff --git a/include/linux/ieee80211.h b/include/linux/ieee80211.h
index c4809ad8ab46..0ef67f837ae1 100644
--- a/include/linux/ieee80211.h
+++ b/include/linux/ieee80211.h
@@ -1670,6 +1670,7 @@ struct ieee80211_mu_edca_param_set {
#define IEEE80211_VHT_CAP_RXSTBC_3 0x00000300
#define IEEE80211_VHT_CAP_RXSTBC_4 0x00000400
#define IEEE80211_VHT_CAP_RXSTBC_MASK 0x00000700
+#define IEEE80211_VHT_CAP_RXSTBC_SHIFT 8
#define IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE 0x00000800
#define IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE 0x00001000
#define IEEE80211_VHT_CAP_BEAMFORMEE_STS_SHIFT 13
diff --git a/net/mac80211/rc80211_minstrel_ht.c b/net/mac80211/rc80211_minstrel_ht.c
index 67ebdeaffbbc..16d1ac30978d 100644
--- a/net/mac80211/rc80211_minstrel_ht.c
+++ b/net/mac80211/rc80211_minstrel_ht.c
@@ -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;
}
}