wifi: rtw89: support for setting HE GI and LTF

Support setting HE GI and LTF values to the kernel via nl80211.
We currently only support some GI and LTF values settings.

The command example is:
  iw wlan0 set bitrates he-gi-2.4 0.8 he-ltf-2.4 2

Signed-off-by: Kuan-Chung Chen <damon.chen@realtek.com>
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://lore.kernel.org/r/20220912070014.10018-2-pkshih@realtek.com

1 files changed, 39 insertions, 0 deletions

diff --git a/drivers/net/wireless/realtek/rtw89/phy.c b/drivers/net/wireless/realtek/rtw89/phy.c
index 094f41cd0928..be2c3715bbf4 100644
--- a/drivers/net/wireless/realtek/rtw89/phy.c
+++ b/drivers/net/wireless/realtek/rtw89/phy.c
@@ -193,6 +193,40 @@ static const u64
 rtw89_ra_mask_he_rates[4] = {RA_MASK_HE_1SS_RATES, RA_MASK_HE_2SS_RATES,
 			     RA_MASK_HE_3SS_RATES, RA_MASK_HE_4SS_RATES};
 
+static void rtw89_phy_ra_gi_ltf(struct rtw89_dev *rtwdev,
+				struct rtw89_sta *rtwsta,
+				bool *fix_giltf_en, u8 *fix_giltf)
+{
+	const struct rtw89_chan *chan = rtw89_chan_get(rtwdev, RTW89_SUB_ENTITY_0);
+	struct cfg80211_bitrate_mask *mask = &rtwsta->mask;
+	u8 band = chan->band_type;
+	enum nl80211_band nl_band = rtw89_hw_to_nl80211_band(band);
+	u8 he_gi = mask->control[nl_band].he_gi;
+	u8 he_ltf = mask->control[nl_band].he_ltf;
+
+	if (!rtwsta->use_cfg_mask)
+		return;
+
+	if (he_ltf == 2 && he_gi == 2) {
+		*fix_giltf = RTW89_GILTF_LGI_4XHE32;
+	} else if (he_ltf == 2 && he_gi == 0) {
+		*fix_giltf = RTW89_GILTF_SGI_4XHE08;
+	} else if (he_ltf == 1 && he_gi == 1) {
+		*fix_giltf = RTW89_GILTF_2XHE16;
+	} else if (he_ltf == 1 && he_gi == 0) {
+		*fix_giltf = RTW89_GILTF_2XHE08;
+	} else if (he_ltf == 0 && he_gi == 1) {
+		*fix_giltf = RTW89_GILTF_1XHE16;
+	} else if (he_ltf == 0 && he_gi == 0) {
+		*fix_giltf = RTW89_GILTF_1XHE08;
+	} else {
+		*fix_giltf_en = false;
+		return;
+	}
+
+	*fix_giltf_en = true;
+}
+
 static void rtw89_phy_ra_sta_update(struct rtw89_dev *rtwdev,
 				    struct ieee80211_sta *sta, bool csi)
 {
@@ -210,8 +244,10 @@ static void rtw89_phy_ra_sta_update(struct rtw89_dev *rtwdev,
 	u8 bw_mode = 0;
 	u8 stbc_en = 0;
 	u8 ldpc_en = 0;
+	u8 fix_giltf = 0;
 	u8 i;
 	bool sgi = false;
+	bool fix_giltf_en = false;
 
 	memset(ra, 0, sizeof(*ra));
 	/* Set the ra mask from sta's capability */
@@ -226,6 +262,7 @@ static void rtw89_phy_ra_sta_update(struct rtw89_dev *rtwdev,
 		if (sta->deflink.he_cap.he_cap_elem.phy_cap_info[1] &
 		    IEEE80211_HE_PHY_CAP1_LDPC_CODING_IN_PAYLOAD)
 			ldpc_en = 1;
+		rtw89_phy_ra_gi_ltf(rtwdev, rtwsta, &fix_giltf_en, &fix_giltf);
 	} else if (sta->deflink.vht_cap.vht_supported) {
 		u16 mcs_map = le16_to_cpu(sta->deflink.vht_cap.vht_mcs.rx_mcs_map);
 
@@ -335,6 +372,8 @@ static void rtw89_phy_ra_sta_update(struct rtw89_dev *rtwdev,
 	ra->ss_num = min(sta->deflink.rx_nss, rtwdev->hal.tx_nss) - 1;
 	ra->en_sgi = sgi;
 	ra->ra_mask = ra_mask;
+	ra->fix_giltf_en = fix_giltf_en;
+	ra->fix_giltf = fix_giltf;
 
 	if (!csi)
 		return;