wifi: rtw89: set response rate selection

With suitable response rate, it can acknowledge peer packets are received.
Otherwise, peer could re-transmit again due to missing of ACK frames.
To achieve this, refer to RX rate and CMAC table to choose the smaller
as initial response rate.
Signed-off-by: Chia-Yuan Li <leo.li@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/20220908051257.25353-6-pkshih@realtek.com

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

@@ -2553,6 +2553,11 @@ struct rtw89_imr_info {
 	u32 tmac_imr_set;
 };
 
+struct rtw89_rrsr_cfgs {
+	struct rtw89_reg3_def ref_rate;
+	struct rtw89_reg3_def rsc;
+};
+
 struct rtw89_dig_regs {
 	u32 seg0_pd_reg;
 	u32 pd_lower_bound_mask;
@@ -2677,6 +2682,7 @@ struct rtw89_chip_info {
 	const struct rtw89_reg_def *dcfo_comp;
 	u8 dcfo_comp_sft;
 	const struct rtw89_imr_info *imr_info;
+	const struct rtw89_rrsr_cfgs *rrsr_cfgs;
 };
 
 union rtw89_bus_info {

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

@@ -1979,6 +1979,8 @@ static int tmac_init(struct rtw89_dev *rtwdev, u8 mac_idx)
 
 static int trxptcl_init(struct rtw89_dev *rtwdev, u8 mac_idx)
 {
+	const struct rtw89_chip_info *chip = rtwdev->chip;
+	const struct rtw89_rrsr_cfgs *rrsr = chip->rrsr_cfgs;
 	u32 reg, val, sifs;
 	int ret;
 
@@ -2009,6 +2011,11 @@ static int trxptcl_init(struct rtw89_dev *rtwdev, u8 mac_idx)
 	reg = rtw89_mac_reg_by_idx(R_AX_RXTRIG_TEST_USER_2, mac_idx);
 	rtw89_write32_set(rtwdev, reg, B_AX_RXTRIG_FCSCHK_EN);
 
+	reg = rtw89_mac_reg_by_idx(rrsr->ref_rate.addr, mac_idx);
+	rtw89_write32_mask(rtwdev, reg, rrsr->ref_rate.mask, rrsr->ref_rate.data);
+	reg = rtw89_mac_reg_by_idx(rrsr->rsc.addr, mac_idx);
+	rtw89_write32_mask(rtwdev, reg, rrsr->rsc.mask, rrsr->rsc.data);
+
 	return 0;
 }
 
@@ -2087,6 +2094,7 @@ static int rmac_init(struct rtw89_dev *rtwdev, u8 mac_idx)
 
 static int cmac_com_init(struct rtw89_dev *rtwdev, u8 mac_idx)
 {
+	enum rtw89_core_chip_id chip_id = rtwdev->chip->chip_id;
 	u32 val, reg;
 	int ret;
 
@@ -2101,6 +2109,11 @@ static int cmac_com_init(struct rtw89_dev *rtwdev, u8 mac_idx)
 	val = u32_replace_bits(val, 0, B_AX_TXSC_80M_MASK);
 	rtw89_write32(rtwdev, reg, val);
 
+	if (chip_id == RTL8852A || chip_id == RTL8852B) {
+		reg = rtw89_mac_reg_by_idx(R_AX_PTCL_RRSR1, mac_idx);
+		rtw89_write32_mask(rtwdev, reg, B_AX_RRSR_RATE_EN_MASK, RRSR_OFDM_CCK_EN);
+	}
+
 	return 0;
 }
 

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

@@ -1833,6 +1833,13 @@
 #define B_AX_TXSC_40M_MASK GENMASK(7, 4)
 #define B_AX_TXSC_20M_MASK GENMASK(3, 0)
 
+#define R_AX_PTCL_RRSR1 0xC090
+#define R_AX_PTCL_RRSR1_C1 0xE090
+#define B_AX_RRSR_RATE_EN_MASK GENMASK(11, 8)
+#define RRSR_OFDM_CCK_EN 3
+#define B_AX_RSC_MASK GENMASK(7, 6)
+#define B_AX_RRSR_CCK_MASK GENMASK(3, 0)
+
 #define R_AX_CMAC_ERR_IMR 0xC160
 #define R_AX_CMAC_ERR_IMR_C1 0xE160
 #define B_AX_WMAC_TX_ERR_IND_EN BIT(7)
@@ -2563,6 +2570,20 @@
 #define WMAC_SPEC_SIFS_OFDM_52C 0x11
 #define WMAC_SPEC_SIFS_CCK	 0xA
 
+#define R_AX_TRXPTCL_RRSR_CTL_0 0xCC08
+#define R_AX_TRXPTCL_RRSR_CTL_0_C1 0xEC08
+#define B_AX_RESP_TX_MACID_CCA_TH_EN BIT(31)
+#define B_AX_RESP_TX_PWRMODE_MASK GENMASK(30, 28)
+#define B_AX_FTM_RRSR_RATE_EN_MASK GENMASK(27, 24)
+#define B_AX_NESS_MASK GENMASK(23, 22)
+#define B_AX_WMAC_RESP_DOPPLEB_AX_EN BIT(21)
+#define B_AX_WMAC_RESP_DCM_EN BIT(20)
+#define B_AX_WMAC_RRSB_AX_CCK_MASK GENMASK(19, 16)
+#define B_AX_WMAC_RESP_RATE_EN_MASK GENMASK(15, 12)
+#define B_AX_WMAC_RESP_RSC_MASK GENMASK(11, 10)
+#define B_AX_WMAC_RESP_REF_RATE_SEL BIT(9)
+#define B_AX_WMAC_RESP_REF_RATE_MASK GENMASK(8, 0)
+
 #define R_AX_MAC_LOOPBACK 0xCC20
 #define R_AX_MAC_LOOPBACK_C1 0xEC20
 #define B_AX_MACLBK_EN BIT(0)

drivers/net/wireless/realtek/rtw89/rtw8852a.c

@@ -453,6 +453,11 @@ static const struct rtw89_imr_info rtw8852a_imr_info = {
 	.tmac_imr_set		= B_AX_TMAC_IMR_SET,
 };
 
+static const struct rtw89_rrsr_cfgs rtw8852a_rrsr_cfgs = {
+	.ref_rate = {R_AX_TRXPTCL_RRSR_CTL_0, B_AX_WMAC_RESP_REF_RATE_SEL, 0},
+	.rsc = {R_AX_TRXPTCL_RRSR_CTL_0, B_AX_WMAC_RESP_RSC_MASK, 2},
+};
+
 static const struct rtw89_dig_regs rtw8852a_dig_regs = {
 	.seg0_pd_reg = R_SEG0R_PD,
 	.pd_lower_bound_mask = B_SEG0R_PD_LOWER_BOUND_MSK,
@@ -2224,7 +2229,8 @@ const struct rtw89_chip_info rtw8852a_chip_info = {
 	.page_regs		= &rtw8852a_page_regs,
 	.dcfo_comp		= &rtw8852a_dcfo_comp,
 	.dcfo_comp_sft		= 3,
-	.imr_info		= &rtw8852a_imr_info
+	.imr_info		= &rtw8852a_imr_info,
+	.rrsr_cfgs		= &rtw8852a_rrsr_cfgs,
 };
 EXPORT_SYMBOL(rtw8852a_chip_info);
 

drivers/net/wireless/realtek/rtw89/rtw8852c.c

@@ -131,6 +131,11 @@ static const struct rtw89_imr_info rtw8852c_imr_info = {
 	.tmac_imr_set		= B_AX_TMAC_IMR_SET_V1,
 };
 
+static const struct rtw89_rrsr_cfgs rtw8852c_rrsr_cfgs = {
+	.ref_rate = {R_AX_TRXPTCL_RRSR_CTL_0, B_AX_WMAC_RESP_REF_RATE_SEL, 0},
+	.rsc = {R_AX_PTCL_RRSR1, B_AX_RSC_MASK, 2},
+};
+
 static const struct rtw89_dig_regs rtw8852c_dig_regs = {
 	.seg0_pd_reg = R_SEG0R_PD,
 	.pd_lower_bound_mask = B_SEG0R_PD_LOWER_BOUND_MSK,
@@ -3068,7 +3073,8 @@ const struct rtw89_chip_info rtw8852c_chip_info = {
 	.page_regs		= &rtw8852c_page_regs,
 	.dcfo_comp		= &rtw8852c_dcfo_comp,
 	.dcfo_comp_sft		= 5,
-	.imr_info		= &rtw8852c_imr_info
+	.imr_info		= &rtw8852c_imr_info,
+	.rrsr_cfgs		= &rtw8852c_rrsr_cfgs,
 };
 EXPORT_SYMBOL(rtw8852c_chip_info);