[PATCH v4 2/5] scsi: ufs: ufs-mediatek: Provide detailed description for UIC errors

Stanley Chu
2022-08-02T13:55:20Z

Provide detailed description in logs for UIC errors for
eaiser issue breakdown.

Signed-off-by: Stanley Chu <stanley.chu@mediatek.com>
---
drivers/ufs/host/ufs-mediatek.c | 58 +++++++++++++++++++++++++++++++++
1 file changed, 58 insertions(+)

diff --git a/drivers/ufs/host/ufs-mediatek.c b/drivers/ufs/host/ufs-mediatek.c
index ff6fd8f52ebc..62bc3b791b38 100644
--- a/drivers/ufs/host/ufs-mediatek.c
+++ b/drivers/ufs/host/ufs-mediatek.c
@@ -46,6 +46,44 @@ static const struct of_device_id ufs_mtk_of_match[] = {
{},
};

+/*
+ * Details of UIC Errors
+ */
+static const char *const ufs_uic_err_str[] = {
+ "PHY Adapter Layer",
+ "Data Link Layer",
+ "Network Link Layer",
+ "Transport Link Layer",
+ "DME"
+};
+
+static const char *const ufs_uic_pa_err_str[] = {
+ "PHY error on Lane 0",
+ "PHY error on Lane 1",
+ "PHY error on Lane 2",
+ "PHY error on Lane 3",
+ "Generic PHY Adapter Error. This should be the LINERESET indication"
+};
+
+static const char *const ufs_uic_dl_err_str[] = {
+ "NAC_RECEIVED",
+ "TCx_REPLAY_TIMER_EXPIRED",
+ "AFCx_REQUEST_TIMER_EXPIRED",
+ "FCx_PROTECTION_TIMER_EXPIRED",
+ "CRC_ERROR",
+ "RX_BUFFER_OVERFLOW",
+ "MAX_FRAME_LENGTH_EXCEEDED",
+ "WRONG_SEQUENCE_NUMBER",
+ "AFC_FRAME_SYNTAX_ERROR",
+ "NAC_FRAME_SYNTAX_ERROR",
+ "EOF_SYNTAX_ERROR",
+ "FRAME_SYNTAX_ERROR",
+ "BAD_CTRL_SYMBOL_TYPE",
+ "PA_INIT_ERROR",
+ "PA_ERROR_IND_RECEIVED",
+ "PA_INIT"
+};
+
static bool ufs_mtk_is_boost_crypt_enabled(struct ufs_hba *hba)
{
struct ufs_mtk_host *host = ufshcd_get_variant(hba);
@@ -1309,8 +1347,28 @@ static void ufs_mtk_event_notify(struct ufs_hba *hba,
enum ufs_event_type evt, void *data)
{
unsigned int val = *(u32 *)data;
+ unsigned long reg;
+ u8 bit;

trace_ufs_mtk_event(evt, val);
+
+ /* Print details of UIC Errors */
+ if (evt <= UFS_EVT_DME_ERR) {
+ dev_info(hba->dev,
+ "Host UIC Error Code (%s): %08x\n",
+ ufs_uic_err_str[evt], val);
+ reg = val;
+ }
+
+ if (evt == UFS_EVT_PA_ERR) {
+ for_each_set_bit(bit, &reg, ARRAY_SIZE(ufs_uic_pa_err_str))
+ dev_info(hba->dev, "%s\n", ufs_uic_pa_err_str[bit]);
+ }
+
+ if (evt == UFS_EVT_DL_ERR) {
+ for_each_set_bit(bit, &reg, ARRAY_SIZE(ufs_uic_dl_err_str))
+ dev_info(hba->dev, "%s\n", ufs_uic_dl_err_str[bit]);
+ }
}

/*
--
2.18.0