[PATCH 3/8] rtw89: mac: correct decision on error status by scenario

[Ping-Ke Shih <pkshih@realtek.com>]

From: Zong-Zhe Yang <kevin_yang@realtek.com>

The raw error code might combine error scenario and error status.
But, the error scenario isn't parsed previously. It makes us mishandle
cpu exception and assertion. Now, we correct the error status for them.

Besides, a few uses of error status are refined.

Signed-off-by: Zong-Zhe Yang <kevin_yang@realtek.com>
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
---
 drivers/net/wireless/realtek/rtw89/mac.c | 12 ++++++++++--
 drivers/net/wireless/realtek/rtw89/mac.h |  8 ++++++++
 drivers/net/wireless/realtek/rtw89/ser.c |  6 ++++--
 3 files changed, 22 insertions(+), 4 deletions(-)

diff --git a/drivers/net/wireless/realtek/rtw89/mac.c b/drivers/net/wireless/realtek/rtw89/mac.c
index 942c56c3dce09..0a8fd672b41f6 100644
--- a/drivers/net/wireless/realtek/rtw89/mac.c
+++ b/drivers/net/wireless/realtek/rtw89/mac.c
@@ -257,7 +257,9 @@ static void rtw89_mac_dump_err_status(struct rtw89_dev *rtwdev,
 	u32 dmac_err, cmac_err;
 
 	if (err != MAC_AX_ERR_L1_ERR_DMAC &&
-	    err != MAC_AX_ERR_L0_PROMOTE_TO_L1)
+	    err != MAC_AX_ERR_L0_PROMOTE_TO_L1 &&
+	    err != MAC_AX_ERR_L0_ERR_CMAC0 &&
+	    err != MAC_AX_ERR_L0_ERR_CMAC1)
 		return;
 
 	rtw89_info(rtwdev, "--->\nerr=0x%x\n", err);
@@ -458,7 +460,7 @@ static void rtw89_mac_dump_err_status(struct rtw89_dev *rtwdev,
 
 u32 rtw89_mac_get_err_status(struct rtw89_dev *rtwdev)
 {
-	u32 err;
+	u32 err, err_scnr;
 	int ret;
 
 	ret = read_poll_timeout(rtw89_read32, err, (err != 0), 1000, 100000,
@@ -471,6 +473,12 @@ u32 rtw89_mac_get_err_status(struct rtw89_dev *rtwdev)
 	err = rtw89_read32(rtwdev, R_AX_HALT_C2H);
 	rtw89_write32(rtwdev, R_AX_HALT_C2H_CTRL, 0);
 
+	err_scnr = RTW89_ERROR_SCENARIO(err);
+	if (err_scnr == RTW89_WCPU_CPU_EXCEPTION)
+		err = MAC_AX_ERR_CPU_EXCEPTION;
+	else if (err_scnr == RTW89_WCPU_ASSERTION)
+		err = MAC_AX_ERR_ASSERTION;
+
 	rtw89_fw_st_dbg_dump(rtwdev);
 	rtw89_mac_dump_err_status(rtwdev, err);
 
diff --git a/drivers/net/wireless/realtek/rtw89/mac.h b/drivers/net/wireless/realtek/rtw89/mac.h
index 8aed3596bc145..aeee078ea69ec 100644
--- a/drivers/net/wireless/realtek/rtw89/mac.h
+++ b/drivers/net/wireless/realtek/rtw89/mac.h
@@ -521,6 +521,13 @@ struct rtw89_mac_dle_dfi_qempty {
 	u32 qempty;
 };
 
+enum rtw89_mac_error_scenario {
+	RTW89_WCPU_CPU_EXCEPTION	= 2,
+	RTW89_WCPU_ASSERTION		= 3,
+};
+
+#define RTW89_ERROR_SCENARIO(__err) ((__err) >> 28)
+
 /* Define DBG and recovery enum */
 enum mac_ax_err_info {
 	/* Get error info */
@@ -659,6 +666,7 @@ enum mac_ax_err_info {
 	MAC_AX_ERR_L2_ERR_APB_BBRF_TO_OTHERS = 0x2370,
 	MAC_AX_ERR_L2_RESET_DONE = 0x2400,
 	MAC_AX_ERR_CPU_EXCEPTION = 0x3000,
+	MAC_AX_ERR_ASSERTION = 0x4000,
 	MAC_AX_GET_ERR_MAX,
 	MAC_AX_DUMP_SHAREBUFF_INDICATOR = 0x80000000,
 
diff --git a/drivers/net/wireless/realtek/rtw89/ser.c b/drivers/net/wireless/realtek/rtw89/ser.c
index e86f3d89ef1bf..5327b97b9c728 100644
--- a/drivers/net/wireless/realtek/rtw89/ser.c
+++ b/drivers/net/wireless/realtek/rtw89/ser.c
@@ -477,7 +477,7 @@ int rtw89_ser_notify(struct rtw89_dev *rtwdev, u32 err)
 {
 	u8 event = SER_EV_NONE;
 
-	rtw89_info(rtwdev, "ser event = 0x%04x\n", err);
+	rtw89_info(rtwdev, "SER catches error: 0x%x\n", err);
 
 	switch (err) {
 	case MAC_AX_ERR_L1_ERR_DMAC:
@@ -503,8 +503,10 @@ int rtw89_ser_notify(struct rtw89_dev *rtwdev, u32 err)
 		break;
 	}
 
-	if (event == SER_EV_NONE)
+	if (event == SER_EV_NONE) {
+		rtw89_warn(rtwdev, "SER cannot recognize error: 0x%x\n", err);
 		return -EINVAL;
+	}
 
 	ser_send_msg(&rtwdev->ser, event);
 	return 0;
-- 
2.25.1