From: Chia-Yuan Li <leo.li@xxxxxxxxxxx>
If the PPDU length for VHT rate exceeds 0x40000, calculating the PSDU
length will overflow. TMAC will determine the length to be too small and
as a result, all packets will be sent as ZLD (Zero Length Delimiter).
Fixes: 5f7e92c59b8e ("wifi: rtw89: 8852b: set AMSDU limit to 5000")
Signed-off-by: Chia-Yuan Li <leo.li@xxxxxxxxxxx>
Signed-off-by: Ping-Ke Shih <pkshih@xxxxxxxxxxx>
---
drivers/net/wireless/realtek/rtw89/mac.c | 7 +++++++
drivers/net/wireless/realtek/rtw89/reg.h | 4 ++++
2 files changed, 11 insertions(+)
diff --git a/drivers/net/wireless/realtek/rtw89/mac.c b/drivers/net/wireless/realtek/rtw89/mac.c
index 89875f59d722..a661c176100c 100644
--- a/drivers/net/wireless/realtek/rtw89/mac.c
+++ b/drivers/net/wireless/realtek/rtw89/mac.c
@@ -2742,6 +2742,7 @@ bool rtw89_mac_is_qta_dbcc(struct rtw89_dev *rtwdev, enum rtw89_qta_mode mode)
static int ptcl_init_ax(struct rtw89_dev *rtwdev, u8 mac_idx)
{
+ enum rtw89_core_chip_id chip_id = rtwdev->chip->chip_id;
u32 val, reg;
int ret;
@@ -2780,6 +2781,12 @@ static int ptcl_init_ax(struct rtw89_dev *rtwdev, u8 mac_idx)
B_AX_SPE_RPT_PATH_MASK, FWD_TO_WLCPU);
}
+ if (chip_id == RTL8852A || rtw89_is_rtl885xb(rtwdev)) {
+ reg = rtw89_mac_reg_by_idx(rtwdev, R_AX_AGG_LEN_VHT_0, mac_idx);
+ rtw89_write32_mask(rtwdev, reg,
+ B_AX_AMPDU_MAX_LEN_VHT_MASK, 0x3FF80);
+ }
+
return 0;
}
diff --git a/drivers/net/wireless/realtek/rtw89/reg.h b/drivers/net/wireless/realtek/rtw89/reg.h
index 7afec48c4056..45730b0d0957 100644
--- a/drivers/net/wireless/realtek/rtw89/reg.h
+++ b/drivers/net/wireless/realtek/rtw89/reg.h
@@ -2506,6 +2506,10 @@
#define B_AX_RTS_TXTIME_TH_MASK GENMASK(15, 8)
#define B_AX_RTS_LEN_TH_MASK GENMASK(7, 0)
+#define R_AX_AGG_LEN_VHT_0 0xC618
+#define R_AX_AGG_LEN_VHT_0_C1 0xE618
+#define B_AX_AMPDU_MAX_LEN_VHT_MASK GENMASK(19, 0)
+
#define S_AX_CTS2S_TH_SEC_256B 1
#define R_AX_SIFS_SETTING 0xC624
#define R_AX_SIFS_SETTING_C1 0xE624
--
2.25.1
