[PATCH v1 2/3] scsi: ufs: add device reset history for vendor implementations

Stanley Chu stanley.chu at mediatek.com
Sat Jan 4 06:26:07 PST 2020


Device reset history shall be also added for vendor's device
reset variant operation implementation.

Cc: Alim Akhtar <alim.akhtar at samsung.com>
Cc: Asutosh Das <asutoshd at codeaurora.org>
Cc: Avri Altman <avri.altman at wdc.com>
Cc: Bart Van Assche <bvanassche at acm.org>
Cc: Bean Huo <beanhuo at micron.com>
Cc: Can Guo <cang at codeaurora.org>
Cc: Matthias Brugger <matthias.bgg at gmail.com>
Signed-off-by: Stanley Chu <stanley.chu at mediatek.com>
---
 drivers/scsi/ufs/ufshcd.c | 5 +++--
 drivers/scsi/ufs/ufshcd.h | 6 +++++-
 2 files changed, 8 insertions(+), 3 deletions(-)

diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
index bae43da00bb6..29e3d50aabfb 100644
--- a/drivers/scsi/ufs/ufshcd.c
+++ b/drivers/scsi/ufs/ufshcd.c
@@ -4346,13 +4346,14 @@ static inline int ufshcd_disable_device_tx_lcc(struct ufs_hba *hba)
 	return ufshcd_disable_tx_lcc(hba, true);
 }
 
-static void ufshcd_update_reg_hist(struct ufs_err_reg_hist *reg_hist,
-				   u32 reg)
+void ufshcd_update_reg_hist(struct ufs_err_reg_hist *reg_hist,
+			    u32 reg)
 {
 	reg_hist->reg[reg_hist->pos] = reg;
 	reg_hist->tstamp[reg_hist->pos] = ktime_get();
 	reg_hist->pos = (reg_hist->pos + 1) % UFS_ERR_REG_HIST_LENGTH;
 }
+EXPORT_SYMBOL_GPL(ufshcd_update_reg_hist);
 
 /**
  * ufshcd_link_startup - Initialize unipro link startup
diff --git a/drivers/scsi/ufs/ufshcd.h b/drivers/scsi/ufs/ufshcd.h
index e05cafddc87b..de1be6a862b0 100644
--- a/drivers/scsi/ufs/ufshcd.h
+++ b/drivers/scsi/ufs/ufshcd.h
@@ -805,6 +805,8 @@ int ufshcd_wait_for_register(struct ufs_hba *hba, u32 reg, u32 mask,
 				u32 val, unsigned long interval_us,
 				unsigned long timeout_ms, bool can_sleep);
 void ufshcd_parse_dev_ref_clk_freq(struct ufs_hba *hba, struct clk *refclk);
+void ufshcd_update_reg_hist(struct ufs_err_reg_hist *reg_hist,
+			    u32 reg);
 
 static inline void check_upiu_size(void)
 {
@@ -1083,8 +1085,10 @@ static inline void ufshcd_vops_dbg_register_dump(struct ufs_hba *hba)
 
 static inline void ufshcd_vops_device_reset(struct ufs_hba *hba)
 {
-	if (hba->vops && hba->vops->device_reset)
+	if (hba->vops && hba->vops->device_reset) {
 		hba->vops->device_reset(hba);
+		ufshcd_update_reg_hist(&hba->ufs_stats.dev_reset, 0);
+	}
 }
 
 extern struct ufs_pm_lvl_states ufs_pm_lvl_states[];
-- 
2.18.0


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