From bc657a36b8999c285a11e1e0abcdca0b18149948 Mon Sep 17 00:00:00 2001 From: Michal Kazior Date: Thu, 26 Feb 2015 11:11:22 +0100 Subject: [PATCH] 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 Signed-off-by: Kalle Valo --- drivers/net/wireless/ath/ath10k/mac.c | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) diff --git a/drivers/net/wireless/ath/ath10k/mac.c b/drivers/net/wireless/ath/ath10k/mac.c index 32b4ce6ec356..638bf32037c5 100644 --- a/drivers/net/wireless/ath/ath10k/mac.c +++ b/drivers/net/wireless/ath/ath10k/mac.c @@ -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) -- 2.11.0