[SRU][M/J][PATCH 1/1] wifi: rtw89: download firmware with five times retry

[Hui Wang]

From: Chia-Yuan Li <leo.li at realtek.com>

BugLink: https://bugs.launchpad.net/bugs/2063096

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 at realtek.com>
Signed-off-by: Ping-Ke Shih <pkshih at realtek.com>
Link: https://msgid.link/20240329015251.22762-2-pkshih@realtek.com
(backported from commit a9e1b0ec5bdeedcf062416af4081aa005f8bf1e7 linux-next)
Signed-off-by: Hui Wang <hui.wang at canonical.com>
---
 drivers/net/wireless/realtek/rtw89/fw.c | 22 ++++++++++++++++++----
 1 file changed, 18 insertions(+), 4 deletions(-)

diff --git a/drivers/net/wireless/realtek/rtw89/fw.c b/drivers/net/wireless/realtek/rtw89/fw.c
index ca83404d558e..aefb67a6bd1d 100644
--- a/drivers/net/wireless/realtek/rtw89/fw.c
+++ b/drivers/net/wireless/realtek/rtw89/fw.c
@@ -556,18 +556,18 @@ 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);
 }
 
-int rtw89_fw_download(struct rtw89_dev *rtwdev, enum rtw89_fw_type type)
+static
+int __rtw89_fw_download(struct rtw89_dev *rtwdev, enum rtw89_fw_type type)
 {
 	struct rtw89_fw_info *fw_info = &rtwdev->fw;
 	struct rtw89_fw_suit *fw_suit = rtw89_fw_suit_get(rtwdev, type);
@@ -627,6 +627,20 @@ 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)
+{
+	int retry;
+	int ret;
+
+	for (retry = 0; retry < 5; retry++) {
+		ret = __rtw89_fw_download(rtwdev, type);
+		if (!ret)
+			return 0;
+	}
+
+	return ret;
+}
+
 int rtw89_wait_firmware_completion(struct rtw89_dev *rtwdev)
 {
 	struct rtw89_fw_info *fw = &rtwdev->fw;
-- 
2.34.1