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From: Ping-Ke Shih <pkshih@realtek.com>
To: <linux-wireless@vger.kernel.org>
CC: <leo.li@realtek.com>, <kevin_yang@realtek.com>
Subject: [PATCH 1/4] wifi: rtw89: download firmware with five times retry
Date: Fri, 29 Mar 2024 09:52:48 +0800
Message-ID: <20240329015251.22762-2-pkshih@realtek.com>
In-Reply-To: <20240329015251.22762-1-pkshih@realtek.com>
References: <20240329015251.22762-1-pkshih@realtek.com>
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From: Chia-Yuan Li <leo.li@realtek.com>

After firmware boots, it reads keys info from efuse and checks secure
checksum, but suddenly failed to access efuse resulting in probe failure,
and driver throws messages:

  rtw89_8852be 0000:03:00.0: fw security fail
  rtw89_8852be 0000:03:00.0: download firmware fail
  rtw89_8852be 0000:03:00.0: [ERR]fwdl 0x1E0 = 0xe2
  rtw89_8852be 0000:03:00.0: [ERR]fwdl 0x83F0 = 0x210090

Retry five times to resolve rare abnormal hardware state.

Signed-off-by: Chia-Yuan Li <leo.li@realtek.com>
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
---
 drivers/net/wireless/realtek/rtw89/fw.c | 27 +++++++++++++++++++------
 1 file changed, 21 insertions(+), 6 deletions(-)

diff --git a/drivers/net/wireless/realtek/rtw89/fw.c b/drivers/net/wireless/realtek/rtw89/fw.c
index f27486d35cbc..e3a07b3d2c72 100644
--- a/drivers/net/wireless/realtek/rtw89/fw.c
+++ b/drivers/net/wireless/realtek/rtw89/fw.c
@@ -1349,13 +1349,12 @@ static void rtw89_fw_prog_cnt_dump(struct rtw89_dev *rtwdev)
 static void rtw89_fw_dl_fail_dump(struct rtw89_dev *rtwdev)
 {
 	u32 val32;
-	u16 val16;
 
 	val32 = rtw89_read32(rtwdev, R_AX_WCPU_FW_CTRL);
 	rtw89_err(rtwdev, "[ERR]fwdl 0x1E0 = 0x%x\n", val32);
 
-	val16 = rtw89_read16(rtwdev, R_AX_BOOT_DBG + 2);
-	rtw89_err(rtwdev, "[ERR]fwdl 0x83F2 = 0x%x\n", val16);
+	val32 = rtw89_read32(rtwdev, R_AX_BOOT_DBG);
+	rtw89_err(rtwdev, "[ERR]fwdl 0x83F0 = 0x%x\n", val32);
 
 	rtw89_fw_prog_cnt_dump(rtwdev);
 }
@@ -1394,8 +1393,9 @@ static int rtw89_fw_download_suit(struct rtw89_dev *rtwdev,
 	return 0;
 }
 
-int rtw89_fw_download(struct rtw89_dev *rtwdev, enum rtw89_fw_type type,
-		      bool include_bb)
+static
+int __rtw89_fw_download(struct rtw89_dev *rtwdev, enum rtw89_fw_type type,
+			bool include_bb)
 {
 	const struct rtw89_mac_gen_def *mac = rtwdev->chip->mac_def;
 	struct rtw89_fw_info *fw_info = &rtwdev->fw;
@@ -1433,7 +1433,7 @@ int rtw89_fw_download(struct rtw89_dev *rtwdev, enum rtw89_fw_type type,
 	ret = rtw89_fw_check_rdy(rtwdev, RTW89_FWDL_CHECK_FREERTOS_DONE);
 	if (ret) {
 		rtw89_warn(rtwdev, "download firmware fail\n");
-		return ret;
+		goto fwdl_err;
 	}
 
 	return ret;
@@ -1443,6 +1443,21 @@ int rtw89_fw_download(struct rtw89_dev *rtwdev, enum rtw89_fw_type type,
 	return ret;
 }
 
+int rtw89_fw_download(struct rtw89_dev *rtwdev, enum rtw89_fw_type type,
+		      bool include_bb)
+{
+	int retry;
+	int ret;
+
+	for (retry = 0; retry < 5; retry++) {
+		ret = __rtw89_fw_download(rtwdev, type, include_bb);
+		if (!ret)
+			return 0;
+	}
+
+	return ret;
+}
+
 int rtw89_wait_firmware_completion(struct rtw89_dev *rtwdev)
 {
 	struct rtw89_fw_info *fw = &rtwdev->fw;
-- 
2.25.1