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ath10k: fix TxBF VHT capabilities for 2+ RF-chain devices 

Firmware doesn't report a complete and
ready-to-use vht cap. Instead the driver is
supposed to fill in the missing bits related to
number of chains.

This effectively increases Compressed Steering
Number and Number of Sounding Dimensions in
AssocReq frames for devices with more than one RF
chain and should improve TxBF performance.

Signed-off-by: Michal Kazior <michal.kazior@tieto.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>
This commit is contained in:
Michal Kazior 2015-02-26 11:11:22 +01:00 committed by Kalle Valo
parent 4543ab0148
commit bc657a36b8
1 changed files with 19 additions and 0 deletions
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19
drivers/net/wireless/ath/ath10k/mac.c
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@ -5473,11 +5473,30 @@ static struct ieee80211_sta_vht_cap ath10k_create_vht_cap(struct ath10k *ar)
{
struct ieee80211_sta_vht_cap vht_cap = {0};
u16 mcs_map;
u32 val;
int i;
vht_cap.vht_supported = 1;
vht_cap.cap = ar->vht_cap_info;
if (ar->vht_cap_info & (IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE |
IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE)) {
val = ar->num_rf_chains - 1;
val <<= IEEE80211_VHT_CAP_BEAMFORMEE_STS_SHIFT;
val &= IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK;
vht_cap.cap |= val;
}
if (ar->vht_cap_info & (IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE |
IEEE80211_VHT_CAP_MU_BEAMFORMER_CAPABLE)) {
val = ar->num_rf_chains - 1;
val <<= IEEE80211_VHT_CAP_SOUNDING_DIMENSIONS_SHIFT;
val &= IEEE80211_VHT_CAP_SOUNDING_DIMENSIONS_MASK;
vht_cap.cap |= val;
}
mcs_map = 0;
for (i = 0; i < 8; i++) {
if (i < ar->num_rf_chains)