rtw88: add phy_info debugfs to show Tx/Rx physical status

This commit adds several Tx/Rx physical information to phy_info
debugfs for 8822B/8822C. By this debugfs, we can know physical
information, such as Tx/Rx rate, RSSI, EVM,SNR, etc. The
information is gotten from the packets of Tx/Rx path. It has
no impact for the performance of 8822B/8822C.

In the fields, we may meet different kinds of problems, but
we may have no professional instrument to check them. At
this moment, this debugfs is a good tool, and it may provide
useful information for debug.

Signed-off-by: Tsang-Shian Lin <thlin@realtek.com>
Signed-off-by: Yan-Hsuan Chuang <yhchuang@realtek.com>
Reviewed-by: Chris Chiu <chiu@endlessm.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

1 files changed, 48 insertions, 0 deletions

diff --git a/drivers/net/wireless/realtek/rtw88/rtw8822c.c b/drivers/net/wireless/realtek/rtw88/rtw8822c.c
index ae4417d6c272..b77905196ffb 100644
--- a/drivers/net/wireless/realtek/rtw88/rtw8822c.c
+++ b/drivers/net/wireless/realtek/rtw88/rtw8822c.c
@@ -1643,6 +1643,8 @@ static void query_phy_status_page0(struct rtw_dev *rtwdev, u8 *phy_status,
 	u8 gain_a, gain_b;
 	s8 rx_power[RTW_RF_PATH_MAX];
 	s8 min_rx_power = -120;
+	u8 rssi;
+	int path;
 
 	rx_power[RF_PATH_A] = GET_PHY_STAT_P0_PWDB_A(phy_status);
 	rx_power[RF_PATH_B] = GET_PHY_STAT_P0_PWDB_B(phy_status);
@@ -1665,6 +1667,11 @@ static void query_phy_status_page0(struct rtw_dev *rtwdev, u8 *phy_status,
 	pkt_stat->rx_power[RF_PATH_A] = rx_power[RF_PATH_A];
 	pkt_stat->rx_power[RF_PATH_B] = rx_power[RF_PATH_B];
 
+	for (path = 0; path <= rtwdev->hal.rf_path_num; path++) {
+		rssi = rtw_phy_rf_power_2_rssi(&pkt_stat->rx_power[path], 1);
+		dm_info->rssi[path] = rssi;
+	}
+
 	pkt_stat->rssi = rtw_phy_rf_power_2_rssi(pkt_stat->rx_power, 1);
 	pkt_stat->bw = RTW_CHANNEL_WIDTH_20;
 	pkt_stat->signal_power = max(pkt_stat->rx_power[RF_PATH_A],
@@ -1674,8 +1681,13 @@ static void query_phy_status_page0(struct rtw_dev *rtwdev, u8 *phy_status,
 static void query_phy_status_page1(struct rtw_dev *rtwdev, u8 *phy_status,
 				   struct rtw_rx_pkt_stat *pkt_stat)
 {
+	struct rtw_dm_info *dm_info = &rtwdev->dm_info;
 	u8 rxsc, bw;
 	s8 min_rx_power = -120;
+	s8 rx_evm;
+	u8 evm_dbm = 0;
+	u8 rssi;
+	int path;
 
 	if (pkt_stat->rate > DESC_RATE11M && pkt_stat->rate < DESC_RATEMCS0)
 		rxsc = GET_PHY_STAT_P1_L_RXSC(phy_status);
@@ -1696,6 +1708,34 @@ static void query_phy_status_page1(struct rtw_dev *rtwdev, u8 *phy_status,
 	pkt_stat->signal_power = max3(pkt_stat->rx_power[RF_PATH_A],
 				      pkt_stat->rx_power[RF_PATH_B],
 				      min_rx_power);
+
+	dm_info->curr_rx_rate = pkt_stat->rate;
+
+	pkt_stat->rx_evm[RF_PATH_A] = GET_PHY_STAT_P1_RXEVM_A(phy_status);
+	pkt_stat->rx_evm[RF_PATH_B] = GET_PHY_STAT_P1_RXEVM_B(phy_status);
+
+	pkt_stat->rx_snr[RF_PATH_A] = GET_PHY_STAT_P1_RXSNR_A(phy_status);
+	pkt_stat->rx_snr[RF_PATH_B] = GET_PHY_STAT_P1_RXSNR_B(phy_status);
+
+	pkt_stat->cfo_tail[RF_PATH_A] = GET_PHY_STAT_P1_CFO_TAIL_A(phy_status);
+	pkt_stat->cfo_tail[RF_PATH_B] = GET_PHY_STAT_P1_CFO_TAIL_B(phy_status);
+
+	for (path = 0; path <= rtwdev->hal.rf_path_num; path++) {
+		rssi = rtw_phy_rf_power_2_rssi(&pkt_stat->rx_power[path], 1);
+		dm_info->rssi[path] = rssi;
+		dm_info->rx_snr[path] = pkt_stat->rx_snr[path] >> 1;
+		dm_info->cfo_tail[path] = (pkt_stat->cfo_tail[path] * 5) >> 1;
+
+		rx_evm = pkt_stat->rx_evm[path];
+
+		if (rx_evm < 0) {
+			if (rx_evm == S8_MIN)
+				evm_dbm = 0;
+			else
+				evm_dbm = ((u8)-rx_evm >> 1);
+		}
+		dm_info->rx_evm_dbm[path] = evm_dbm;
+	}
 }
 
 static void query_phy_status(struct rtw_dev *rtwdev, u8 *phy_status,
@@ -1850,6 +1890,7 @@ static void rtw8822c_false_alarm_statistics(struct rtw_dev *rtwdev)
 	u32 cck_enable;
 	u32 cck_fa_cnt;
 	u32 crc32_cnt;
+	u32 cca32_cnt;
 	u32 ofdm_fa_cnt;
 	u32 ofdm_fa_cnt1, ofdm_fa_cnt2, ofdm_fa_cnt3, ofdm_fa_cnt4, ofdm_fa_cnt5;
 	u16 parity_fail, rate_illegal, crc8_fail, mcs_fail, sb_search_fail,
@@ -1894,6 +1935,13 @@ static void rtw8822c_false_alarm_statistics(struct rtw_dev *rtwdev)
 	dm_info->vht_ok_cnt = crc32_cnt & 0xffff;
 	dm_info->vht_err_cnt = (crc32_cnt & 0xffff0000) >> 16;
 
+	cca32_cnt = rtw_read32(rtwdev, 0x2c08);
+	dm_info->ofdm_cca_cnt = ((cca32_cnt & 0xffff0000) >> 16);
+	dm_info->cck_cca_cnt = cca32_cnt & 0xffff;
+	dm_info->total_cca_cnt = dm_info->ofdm_cca_cnt;
+	if (cck_enable)
+		dm_info->total_cca_cnt += dm_info->cck_cca_cnt;
+
 	rtw_write32_mask(rtwdev, REG_CCANRX, BIT_CCK_FA_RST, 0);
 	rtw_write32_mask(rtwdev, REG_CCANRX, BIT_CCK_FA_RST, 2);
 	rtw_write32_mask(rtwdev, REG_CCANRX, BIT_OFDM_FA_RST, 0);