From: JaeHun Jung <jh0801.jung@samsung.com>
Date: Wed, 20 Nov 2019 02:39:06 +0000 (+0900)
Subject: [COMMON] scsi: ufs: Add reset for PA_ERROR interrupt storming control.
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=ca9f22ceb56fc6033a5034a330150e3a91a3c456;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git

[COMMON] scsi: ufs: Add reset for PA_ERROR interrupt storming control.

Sometimes PA_ERROR could not recover phy status automatically.
So, We shuld execute phy reset for recovery.

Change-Id: Ic5d8a202712626fe4fb242daea8eedd73d31dc0e
Signed-off-by: JaeHun Jung <jh0801.jung@samsung.com>
---

diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
index 173a1b8fe7a9..c2590970635b 100644
--- a/drivers/scsi/ufs/ufshcd.c
+++ b/drivers/scsi/ufs/ufshcd.c
@@ -5617,7 +5617,13 @@ static void ufshcd_update_uic_error(struct ufs_hba *hba)
 
 	if (reg & UIC_DATA_LINK_LAYER_ERROR_PA_INIT)
 		hba->uic_error |= UFSHCD_UIC_DL_PA_INIT_ERROR;
-	else if (hba->dev_quirks &
+	else if (reg & UIC_DATA_LINK_LAYER_ERROR_PA_ERROR_IND_RECEIVED) {
+		if (hba->saved_uic_phy_err_cnt > 10) {
+			hba->uic_error |= UFSHCD_UIC_DL_PA_INIT_ERROR;
+			hba->saved_uic_phy_err_cnt = 0;
+		} else
+			hba->saved_uic_phy_err_cnt++;
+	} else if (hba->dev_quirks &
 		   UFS_DEVICE_QUIRK_RECOVERY_FROM_DL_NAC_ERRORS) {
 		if (reg & UIC_DATA_LINK_LAYER_ERROR_NAC_RECEIVED)
 			hba->uic_error |=
@@ -5742,6 +5748,8 @@ static void ufshcd_sl_intr(struct ufs_hba *hba, u32 intr_status)
 	hba->errors = UFSHCD_ERROR_MASK & intr_status;
 	if (hba->errors)
 		ufshcd_check_errors(hba);
+	else
+		hba->saved_uic_phy_err_cnt = 0;
 
 	if (intr_status & UFSHCD_UIC_MASK)
 		ufshcd_uic_cmd_compl(hba, intr_status);
diff --git a/drivers/scsi/ufs/ufshcd.h b/drivers/scsi/ufs/ufshcd.h
index 66fc19979732..f70a9d09bfed 100644
--- a/drivers/scsi/ufs/ufshcd.h
+++ b/drivers/scsi/ufs/ufshcd.h
@@ -669,6 +669,7 @@ struct ufs_hba {
 	u32 uic_error;
 	u32 saved_err;
 	u32 saved_uic_err;
+	u32 saved_uic_phy_err_cnt;
 	struct ufs_stats ufs_stats;
 
 	u32 tcx_replay_timer_expired_cnt;
diff --git a/drivers/scsi/ufs/ufshci.h b/drivers/scsi/ufs/ufshci.h
index 63a22b991014..2ef54bf202a5 100644
--- a/drivers/scsi/ufs/ufshci.h
+++ b/drivers/scsi/ufs/ufshci.h
@@ -194,6 +194,7 @@ enum {
 #define UIC_DATA_LINK_LAYER_ERROR_FCX_PRO_TIMER_EXP	UFS_BIT(3)
 #define UIC_DATA_LINK_LAYER_ERROR_RX_BUF_OF	UFS_BIT(5)
 #define UIC_DATA_LINK_LAYER_ERROR_PA_INIT	UFS_BIT(13)
+#define UIC_DATA_LINK_LAYER_ERROR_PA_ERROR_IND_RECEIVED		UFS_BIT(14)
 #define UIC_DATA_LINK_LAYER_ERROR_NAC_RECEIVED	0x0001
 #define UIC_DATA_LINK_LAYER_ERROR_TCx_REPLAY_TIMEOUT 0x0002