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

drivers/net/wireless/realtek/rtw89/core.h

@@ -2069,7 +2069,9 @@ struct rtw89_ra_info {
 	u8 ra_csi_rate_en:1;
 	u8 fixed_csi_rate_en:1;
 	u8 cr_tbl_sel:1;
-	u8 rsvd2:5;
+	u8 fix_giltf_en:1;
+	u8 fix_giltf:3;
+	u8 rsvd2:1;
 	u8 csi_mcs_ss_idx;
 	u8 csi_mode:2;
 	u8 csi_gi_ltf:3;

drivers/net/wireless/realtek/rtw89/fw.c

@@ -1468,6 +1468,8 @@ int rtw89_fw_h2c_ra(struct rtw89_dev *rtwdev, struct rtw89_ra_info *ra, bool csi
 	RTW89_SET_FWCMD_RA_MASK_2(cmd, FIELD_GET(MASKBYTE2, ra->ra_mask));
 	RTW89_SET_FWCMD_RA_MASK_3(cmd, FIELD_GET(MASKBYTE3, ra->ra_mask));
 	RTW89_SET_FWCMD_RA_MASK_4(cmd, FIELD_GET(MASKBYTE4, ra->ra_mask));
+	RTW89_SET_FWCMD_RA_FIX_GILTF_EN(cmd, ra->fix_giltf_en);
+	RTW89_SET_FWCMD_RA_FIX_GILTF(cmd, ra->fix_giltf);
 
 	if (csi) {
 		RTW89_SET_FWCMD_RA_BFEE_CSI_CTL(cmd, 1);

drivers/net/wireless/realtek/rtw89/fw.h

@@ -361,6 +361,16 @@ static inline void RTW89_SET_FWCMD_RA_CR_TBL_SEL(void *cmd, u32 val)
 	le32p_replace_bits((__le32 *)(cmd) + 0x03, val, BIT(10));
 }
 
+static inline void RTW89_SET_FWCMD_RA_FIX_GILTF_EN(void *cmd, u32 val)
+{
+	le32p_replace_bits((__le32 *)(cmd) + 0x03, val, BIT(11));
+}
+
+static inline void RTW89_SET_FWCMD_RA_FIX_GILTF(void *cmd, u32 val)
+{
+	le32p_replace_bits((__le32 *)(cmd) + 0x03, val, GENMASK(14, 12));
+}
+
 static inline void RTW89_SET_FWCMD_RA_FIXED_CSI_MCS_SS_IDX(void *cmd, u32 val)
 {
 	le32p_replace_bits((__le32 *)(cmd) + 0x03, val, GENMASK(23, 16));

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;