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* [PATCH] rtw88: don't check CRC of VHT-SIG-B in 802.11ac signal
@ 2021-12-17  1:24 Ping-Ke Shih
  2021-12-20 18:49 ` Kalle Valo
  0 siblings, 1 reply; 2+ messages in thread
From: Ping-Ke Shih @ 2021-12-17  1:24 UTC (permalink / raw)
  To: tony0620emma, kvalo; +Cc: linux-wireless, timlee

From: Chin-Yen Lee <timlee@realtek.com>

Currently all realtek wifi chip is set to check CRC of VHT-SIG-B
in 802.11ac signal, but some AP don't calculate the CRC and packets
from these AP can't be received and lead to disconnection.
We disable the check defaultly to avoid this case.

Signed-off-by: Chin-Yen Lee <timlee@realtek.com>
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
---
 drivers/net/wireless/realtek/rtw88/bf.c       | 14 +++++++++-----
 drivers/net/wireless/realtek/rtw88/bf.h       |  7 +++++--
 drivers/net/wireless/realtek/rtw88/rtw8821c.c |  3 ++-
 drivers/net/wireless/realtek/rtw88/rtw8822b.c |  2 ++
 drivers/net/wireless/realtek/rtw88/rtw8822c.c |  2 ++
 5 files changed, 20 insertions(+), 8 deletions(-)

diff --git a/drivers/net/wireless/realtek/rtw88/bf.c b/drivers/net/wireless/realtek/rtw88/bf.c
index aff70e4ae0288..df750b3a35e9d 100644
--- a/drivers/net/wireless/realtek/rtw88/bf.c
+++ b/drivers/net/wireless/realtek/rtw88/bf.c
@@ -130,7 +130,8 @@ void rtw_bf_cfg_sounding(struct rtw_dev *rtwdev, struct rtw_vif *vif,
 		  BIT_WMAC_USE_NDPARATE |
 		  (csi_rsc << 13);
 
-	rtw_write8(rtwdev, REG_SND_PTCL_CTRL, RTW_SND_CTRL_SOUNDING);
+	rtw_write8_mask(rtwdev, REG_SND_PTCL_CTRL, BIT_MASK_BEAMFORM,
+			RTW_SND_CTRL_SOUNDING);
 	rtw_write8(rtwdev, REG_SND_PTCL_CTRL + 3, 0x26);
 	rtw_write8_clr(rtwdev, REG_RXFLTMAP1, BIT_RXFLTMAP1_BF_REPORT_POLL);
 	rtw_write8_clr(rtwdev, REG_RXFLTMAP4, BIT_RXFLTMAP4_BF_REPORT_POLL);
@@ -177,7 +178,7 @@ void rtw_bf_del_bfer_entry_mu(struct rtw_dev *rtwdev)
 
 void rtw_bf_del_sounding(struct rtw_dev *rtwdev)
 {
-	rtw_write8(rtwdev, REG_SND_PTCL_CTRL, 0);
+	rtw_write8_mask(rtwdev, REG_SND_PTCL_CTRL, BIT_MASK_BEAMFORM, 0);
 }
 
 void rtw_bf_enable_bfee_su(struct rtw_dev *rtwdev, struct rtw_vif *vif,
@@ -204,7 +205,8 @@ void rtw_bf_enable_bfee_su(struct rtw_dev *rtwdev, struct rtw_vif *vif,
 	}
 
 	/* Sounding protocol control */
-	rtw_write8(rtwdev, REG_SND_PTCL_CTRL, RTW_SND_CTRL_SOUNDING);
+	rtw_write8_mask(rtwdev, REG_SND_PTCL_CTRL, BIT_MASK_BEAMFORM,
+			RTW_SND_CTRL_SOUNDING);
 
 	/* MAC address/Partial AID of Beamformer */
 	for (i = 0; i < ETH_ALEN; i++)
@@ -273,7 +275,8 @@ void rtw_bf_remove_bfee_su(struct rtw_dev *rtwdev,
 	struct rtw_bf_info *bfinfo = &rtwdev->bf_info;
 
 	rtw_dbg(rtwdev, RTW_DBG_BF, "remove as a su bfee\n");
-	rtw_write8(rtwdev, REG_SND_PTCL_CTRL, RTW_SND_CTRL_REMOVE);
+	rtw_write8_mask(rtwdev, REG_SND_PTCL_CTRL, BIT_MASK_BEAMFORM,
+			RTW_SND_CTRL_REMOVE);
 
 	switch (bfee->su_reg_index) {
 	case 0:
@@ -298,7 +301,8 @@ void rtw_bf_remove_bfee_mu(struct rtw_dev *rtwdev,
 {
 	struct rtw_bf_info *bfinfo = &rtwdev->bf_info;
 
-	rtw_write8(rtwdev, REG_SND_PTCL_CTRL, RTW_SND_CTRL_REMOVE);
+	rtw_write8_mask(rtwdev, REG_SND_PTCL_CTRL, BIT_MASK_BEAMFORM,
+			RTW_SND_CTRL_REMOVE);
 
 	rtw_bf_del_bfer_entry_mu(rtwdev);
 
diff --git a/drivers/net/wireless/realtek/rtw88/bf.h b/drivers/net/wireless/realtek/rtw88/bf.h
index 17855edb5006a..7b40c2c038560 100644
--- a/drivers/net/wireless/realtek/rtw88/bf.h
+++ b/drivers/net/wireless/realtek/rtw88/bf.h
@@ -13,6 +13,9 @@
 #define REG_ASSOCIATED_BFMER1_INFO	0x06EC
 #define REG_TX_CSI_RPT_PARAM_BW20	0x06F4
 #define REG_SND_PTCL_CTRL		0x0718
+#define BIT_DIS_CHK_VHTSIGB_CRC		BIT(6)
+#define BIT_DIS_CHK_VHTSIGA_CRC		BIT(5)
+#define BIT_MASK_BEAMFORM		(GENMASK(4, 0) | BIT(7))
 #define REG_MU_TX_CTL			0x14C0
 #define REG_MU_STA_GID_VLD		0x14C4
 #define REG_MU_STA_USER_POS_INFO	0x14C8
@@ -42,8 +45,8 @@
 #define BIT_RXFLTMAP4_BF_REPORT_POLL	BIT(4)
 
 #define RTW_NDP_RX_STANDBY_TIME	0x70
-#define RTW_SND_CTRL_REMOVE	0xD8
-#define RTW_SND_CTRL_SOUNDING	0xDB
+#define RTW_SND_CTRL_REMOVE	0x98
+#define RTW_SND_CTRL_SOUNDING	0x9B
 
 enum csi_seg_len {
 	HAL_CSI_SEG_4K = 0,
diff --git a/drivers/net/wireless/realtek/rtw88/rtw8821c.c b/drivers/net/wireless/realtek/rtw88/rtw8821c.c
index 80a6f4da6acd9..db078df63f855 100644
--- a/drivers/net/wireless/realtek/rtw88/rtw8821c.c
+++ b/drivers/net/wireless/realtek/rtw88/rtw8821c.c
@@ -223,7 +223,8 @@ static int rtw8821c_mac_init(struct rtw_dev *rtwdev)
 	rtw_write8(rtwdev, REG_TCR + 1, WLAN_TX_FUNC_CFG1);
 	rtw_write8(rtwdev, REG_ACKTO_CCK, 0x40);
 	rtw_write8_set(rtwdev, REG_WMAC_TRXPTCL_CTL_H, BIT(1));
-	rtw_write8_set(rtwdev, REG_SND_PTCL_CTRL, BIT(6));
+	rtw_write8_set(rtwdev, REG_SND_PTCL_CTRL,
+		       BIT_DIS_CHK_VHTSIGB_CRC);
 	rtw_write32(rtwdev, REG_WMAC_OPTION_FUNCTION + 8, WLAN_MAC_OPT_FUNC2);
 	rtw_write8(rtwdev, REG_WMAC_OPTION_FUNCTION + 4, WLAN_MAC_OPT_NORM_FUNC1);
 
diff --git a/drivers/net/wireless/realtek/rtw88/rtw8822b.c b/drivers/net/wireless/realtek/rtw88/rtw8822b.c
index c409c8c29ec8b..a4cbcc6bdcd14 100644
--- a/drivers/net/wireless/realtek/rtw88/rtw8822b.c
+++ b/drivers/net/wireless/realtek/rtw88/rtw8822b.c
@@ -262,6 +262,8 @@ static int rtw8822b_mac_init(struct rtw_dev *rtwdev)
 	rtw_write8(rtwdev, REG_TCR + 1, WLAN_TX_FUNC_CFG1);
 	rtw_write32(rtwdev, REG_WMAC_OPTION_FUNCTION + 8, WLAN_MAC_OPT_FUNC2);
 	rtw_write8(rtwdev, REG_WMAC_OPTION_FUNCTION + 4, WLAN_MAC_OPT_NORM_FUNC1);
+	rtw_write8_set(rtwdev, REG_SND_PTCL_CTRL,
+		       BIT_DIS_CHK_VHTSIGB_CRC);
 
 	return 0;
 }
diff --git a/drivers/net/wireless/realtek/rtw88/rtw8822c.c b/drivers/net/wireless/realtek/rtw88/rtw8822c.c
index 46b881e8e4feb..a8b95dcdb8e90 100644
--- a/drivers/net/wireless/realtek/rtw88/rtw8822c.c
+++ b/drivers/net/wireless/realtek/rtw88/rtw8822c.c
@@ -2102,6 +2102,8 @@ static int rtw8822c_mac_init(struct rtw_dev *rtwdev)
 		     BIT_RXPSF_CONT_ERRCHKEN);
 	value16 = BIT_SET_RXPSF_ERRTHR(value16, 0x07);
 	rtw_write16(rtwdev, REG_RXPSF_CTRL, value16);
+	rtw_write8_set(rtwdev, REG_SND_PTCL_CTRL,
+		       BIT_DIS_CHK_VHTSIGB_CRC);
 
 	/* Interrupt migration configuration */
 	rtw_write32(rtwdev, REG_INT_MIG, WLAN_MAC_INT_MIG_CFG);
-- 
2.25.1


^ permalink raw reply related	[flat|nested] 2+ messages in thread
* Re: [PATCH] rtw88: don't check CRC of VHT-SIG-B in 802.11ac signal
  2021-12-17  1:24 [PATCH] rtw88: don't check CRC of VHT-SIG-B in 802.11ac signal Ping-Ke Shih
@ 2021-12-20 18:49 ` Kalle Valo
  0 siblings, 0 replies; 2+ messages in thread
From: Kalle Valo @ 2021-12-20 18:49 UTC (permalink / raw)
  To: Ping-Ke Shih; +Cc: tony0620emma, kvalo, linux-wireless, timlee

Ping-Ke Shih <pkshih@realtek.com> wrote:

> From: Chin-Yen Lee <timlee@realtek.com>
> 
> Currently all realtek wifi chip is set to check CRC of VHT-SIG-B
> in 802.11ac signal, but some AP don't calculate the CRC and packets
> from these AP can't be received and lead to disconnection.
> We disable the check defaultly to avoid this case.
> 
> Signed-off-by: Chin-Yen Lee <timlee@realtek.com>
> Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>

Patch applied to wireless-drivers-next.git, thanks.

a3fd1f9aa79a rtw88: don't check CRC of VHT-SIG-B in 802.11ac signal

-- 
https://patchwork.kernel.org/project/linux-wireless/patch/20211217012421.7859-1-pkshih@realtek.com/

https://wireless.wiki.kernel.org/en/developers/documentation/submittingpatches


^ permalink raw reply	[flat|nested] 2+ messages in thread
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2021-12-17  1:24 [PATCH] rtw88: don't check CRC of VHT-SIG-B in 802.11ac signal Ping-Ke Shih
2021-12-20 18:49 ` Kalle Valo

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