rtw88: 8723d: Add query_rx_desc

This ops is used to parse RX descriptor to know the length of received
packet and containing PHY status. If PHY status is existing, the order is
RX descriptor, PHY status and then packet.

There are two types of PHY status, named CCK and OFDM. Their size are the
same, but formats are different.

struct ieee80211_rx_status is also filled depends on above information.

Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Signed-off-by: Yan-Hsuan Chuang <yhchuang@realtek.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/20200504105010.10780-3-yhchuang@realtek.com

1 files changed, 116 insertions, 0 deletions

diff --git a/drivers/net/wireless/realtek/rtw88/rtw8723d.c b/drivers/net/wireless/realtek/rtw88/rtw8723d.c
index 52afa72caf8f..653cfa9445fc 100644
--- a/drivers/net/wireless/realtek/rtw88/rtw8723d.c
+++ b/drivers/net/wireless/realtek/rtw88/rtw8723d.c
@@ -172,6 +172,121 @@ static int rtw8723d_read_efuse(struct rtw_dev *rtwdev, u8 *log_map)
 	return 0;
 }
 
+static void query_phy_status_page0(struct rtw_dev *rtwdev, u8 *phy_status,
+				   struct rtw_rx_pkt_stat *pkt_stat)
+{
+	struct rtw_dm_info *dm_info = &rtwdev->dm_info;
+	s8 min_rx_power = -120;
+	u8 pwdb = GET_PHY_STAT_P0_PWDB(phy_status);
+
+	pkt_stat->rx_power[RF_PATH_A] = pwdb - 97;
+	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],
+				     min_rx_power);
+	dm_info->rssi[RF_PATH_A] = pkt_stat->rssi;
+}
+
+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;
+
+	if (pkt_stat->rate > DESC_RATE11M && pkt_stat->rate < DESC_RATEMCS0)
+		rxsc = GET_PHY_STAT_P1_L_RXSC(phy_status);
+	else
+		rxsc = GET_PHY_STAT_P1_HT_RXSC(phy_status);
+
+	if (GET_PHY_STAT_P1_RF_MODE(phy_status) == 0)
+		bw = RTW_CHANNEL_WIDTH_20;
+	else if ((rxsc == 1) || (rxsc == 2))
+		bw = RTW_CHANNEL_WIDTH_20;
+	else
+		bw = RTW_CHANNEL_WIDTH_40;
+
+	pkt_stat->rx_power[RF_PATH_A] = GET_PHY_STAT_P1_PWDB_A(phy_status) - 110;
+	pkt_stat->rssi = rtw_phy_rf_power_2_rssi(pkt_stat->rx_power, 1);
+	pkt_stat->bw = bw;
+	pkt_stat->signal_power = max(pkt_stat->rx_power[RF_PATH_A],
+				     min_rx_power);
+	pkt_stat->rx_evm[RF_PATH_A] = GET_PHY_STAT_P1_RXEVM_A(phy_status);
+	pkt_stat->rx_snr[RF_PATH_A] = GET_PHY_STAT_P1_RXSNR_A(phy_status);
+	pkt_stat->cfo_tail[RF_PATH_A] = GET_PHY_STAT_P1_CFO_TAIL_A(phy_status);
+
+	dm_info->curr_rx_rate = pkt_stat->rate;
+	dm_info->rssi[RF_PATH_A] = pkt_stat->rssi;
+	dm_info->rx_snr[RF_PATH_A] = pkt_stat->rx_snr[RF_PATH_A] >> 1;
+	dm_info->cfo_tail[RF_PATH_A] = (pkt_stat->cfo_tail[RF_PATH_A] * 5) >> 1;
+
+	rx_evm = clamp_t(s8, -pkt_stat->rx_evm[RF_PATH_A] >> 1, 0, 64);
+	rx_evm &= 0x3F;	/* 64->0: second path of 1SS rate is 64 */
+	dm_info->rx_evm_dbm[RF_PATH_A] = rx_evm;
+}
+
+static void query_phy_status(struct rtw_dev *rtwdev, u8 *phy_status,
+			     struct rtw_rx_pkt_stat *pkt_stat)
+{
+	u8 page;
+
+	page = *phy_status & 0xf;
+
+	switch (page) {
+	case 0:
+		query_phy_status_page0(rtwdev, phy_status, pkt_stat);
+		break;
+	case 1:
+		query_phy_status_page1(rtwdev, phy_status, pkt_stat);
+		break;
+	default:
+		rtw_warn(rtwdev, "unused phy status page (%d)\n", page);
+		return;
+	}
+}
+
+static void rtw8723d_query_rx_desc(struct rtw_dev *rtwdev, u8 *rx_desc,
+				   struct rtw_rx_pkt_stat *pkt_stat,
+				   struct ieee80211_rx_status *rx_status)
+{
+	struct ieee80211_hdr *hdr;
+	u32 desc_sz = rtwdev->chip->rx_pkt_desc_sz;
+	u8 *phy_status = NULL;
+
+	memset(pkt_stat, 0, sizeof(*pkt_stat));
+
+	pkt_stat->phy_status = GET_RX_DESC_PHYST(rx_desc);
+	pkt_stat->icv_err = GET_RX_DESC_ICV_ERR(rx_desc);
+	pkt_stat->crc_err = GET_RX_DESC_CRC32(rx_desc);
+	pkt_stat->decrypted = !GET_RX_DESC_SWDEC(rx_desc) &&
+			      GET_RX_DESC_ENC_TYPE(rx_desc) != RX_DESC_ENC_NONE;
+	pkt_stat->is_c2h = GET_RX_DESC_C2H(rx_desc);
+	pkt_stat->pkt_len = GET_RX_DESC_PKT_LEN(rx_desc);
+	pkt_stat->drv_info_sz = GET_RX_DESC_DRV_INFO_SIZE(rx_desc);
+	pkt_stat->shift = GET_RX_DESC_SHIFT(rx_desc);
+	pkt_stat->rate = GET_RX_DESC_RX_RATE(rx_desc);
+	pkt_stat->cam_id = GET_RX_DESC_MACID(rx_desc);
+	pkt_stat->ppdu_cnt = 0;
+	pkt_stat->tsf_low = GET_RX_DESC_TSFL(rx_desc);
+
+	/* drv_info_sz is in unit of 8-bytes */
+	pkt_stat->drv_info_sz *= 8;
+
+	/* c2h cmd pkt's rx/phy status is not interested */
+	if (pkt_stat->is_c2h)
+		return;
+
+	hdr = (struct ieee80211_hdr *)(rx_desc + desc_sz + pkt_stat->shift +
+				       pkt_stat->drv_info_sz);
+	if (pkt_stat->phy_status) {
+		phy_status = rx_desc + desc_sz + pkt_stat->shift;
+		query_phy_status(rtwdev, phy_status, pkt_stat);
+	}
+
+	rtw_rx_fill_rx_status(rtwdev, pkt_stat, hdr, rx_status, phy_status);
+}
+
 #define BIT_CFENDFORM		BIT(9)
 #define BIT_WMAC_TCR_ERR0	BIT(12)
 #define BIT_WMAC_TCR_ERR1	BIT(13)
@@ -267,6 +382,7 @@ static void rtw8723d_efuse_grant(struct rtw_dev *rtwdev, bool on)
 static struct rtw_chip_ops rtw8723d_ops = {
 	.phy_set_param		= rtw8723d_phy_set_param,
 	.read_efuse		= rtw8723d_read_efuse,
+	.query_rx_desc		= rtw8723d_query_rx_desc,
 	.mac_init		= rtw8723d_mac_init,
 	.read_rf		= rtw_phy_read_rf_sipi,
 	.write_rf		= rtw_phy_write_rf_reg_sipi,