[6/6] scsi: hisi_sas: Change SERDES_CFG init value to increase reliability of HiLink

Message ID 1551365462-128193-7-git-send-email-john.garry@huawei.com
State New
Headers show
  • Untitled series #18926
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Commit Message

John Garry Feb. 28, 2019, 2:51 p.m.
From: Xiang Chen <chenxiang66@hisilicon.com>

With default value of register SERDES_CFG, the link is not stable for some
special disks when running IO. According to HW guys' suggestion, need to
make the bit10~19 value of register SERDES_CFG the max value to increase
the reliability of the HiLink.

Signed-off-by: Xiang Chen <chenxiang66@hisilicon.com>

Reviewed-by: Yupeng Zhou <zhouyupeng1@huawei.com>

Signed-off-by: John Garry <john.garry@huawei.com>

 drivers/scsi/hisi_sas/hisi_sas_v3_hw.c | 2 ++
 1 file changed, 2 insertions(+)



diff --git a/drivers/scsi/hisi_sas/hisi_sas_v3_hw.c b/drivers/scsi/hisi_sas/hisi_sas_v3_hw.c
index 720721196b12..e2f2c04355b9 100644
--- a/drivers/scsi/hisi_sas/hisi_sas_v3_hw.c
+++ b/drivers/scsi/hisi_sas/hisi_sas_v3_hw.c
@@ -129,6 +129,7 @@ 
 #define CMD_HDR_PIR_OFF			8
 #define CMD_HDR_PIR_MSK			(0x1 << CMD_HDR_PIR_OFF)
+#define SERDES_CFG			(PORT_BASE + 0x1c)
 #define SL_CFG				(PORT_BASE + 0x84)
 #define AIP_LIMIT			(PORT_BASE + 0x90)
 #define SL_CONTROL			(PORT_BASE + 0x94)
@@ -525,6 +526,7 @@  static void init_reg_v3_hw(struct hisi_hba *hisi_hba)
 		hisi_sas_phy_write32(hisi_hba, i, PROG_PHY_LINK_RATE,
+		hisi_sas_phy_write32(hisi_hba, i, SERDES_CFG, 0xffc00);
 		hisi_sas_phy_write32(hisi_hba, i, SAS_RX_TRAIN_TIMER, 0x13e80);
 		hisi_sas_phy_write32(hisi_hba, i, CHL_INT0, 0xffffffff);
 		hisi_sas_phy_write32(hisi_hba, i, CHL_INT1, 0xffffffff);