lkml.org 
[lkml]   [2020]   [Jan]   [16]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH AUTOSEL 5.4 063/205] scsi: hisi_sas: Set the BIST init value before enabling BIST
Date
From: Xiang Chen <chenxiang66@hisilicon.com>

[ Upstream commit 65a3b8bd56942dc988b8c05615bd3f510a10012b ]

If set the BIST init value after enabling BIST, there may be still some few
error bits. According to the process, need to set the BIST init value
before enabling BIST.

Fixes: 97b151e75861 ("scsi: hisi_sas: Add BIST support for phy loopback")
Link: https://lore.kernel.org/r/1571926105-74636-3-git-send-email-john.garry@huawei.com
Signed-off-by: Xiang Chen <chenxiang66@hisilicon.com>
Signed-off-by: John Garry <john.garry@huawei.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/scsi/hisi_sas/hisi_sas_v3_hw.c | 10 +++++-----
1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/drivers/scsi/hisi_sas/hisi_sas_v3_hw.c b/drivers/scsi/hisi_sas/hisi_sas_v3_hw.c
index ef32ee12f606..c4f76d7c29db 100644
--- a/drivers/scsi/hisi_sas/hisi_sas_v3_hw.c
+++ b/drivers/scsi/hisi_sas/hisi_sas_v3_hw.c
@@ -3022,11 +3022,6 @@ static int debugfs_set_bist_v3_hw(struct hisi_hba *hisi_hba, bool enable)
hisi_sas_phy_write32(hisi_hba, phy_id,
SAS_PHY_BIST_CTRL, reg_val);

- mdelay(100);
- reg_val |= (CFG_RX_BIST_EN_MSK | CFG_TX_BIST_EN_MSK);
- hisi_sas_phy_write32(hisi_hba, phy_id,
- SAS_PHY_BIST_CTRL, reg_val);
-
/* set the bist init value */
hisi_sas_phy_write32(hisi_hba, phy_id,
SAS_PHY_BIST_CODE,
@@ -3035,6 +3030,11 @@ static int debugfs_set_bist_v3_hw(struct hisi_hba *hisi_hba, bool enable)
SAS_PHY_BIST_CODE1,
SAS_PHY_BIST_CODE1_INIT);

+ mdelay(100);
+ reg_val |= (CFG_RX_BIST_EN_MSK | CFG_TX_BIST_EN_MSK);
+ hisi_sas_phy_write32(hisi_hba, phy_id,
+ SAS_PHY_BIST_CTRL, reg_val);
+
/* clear error bit */
mdelay(100);
hisi_sas_phy_read32(hisi_hba, phy_id, SAS_BIST_ERR_CNT);
--
2.20.1
\
 
 \ /
  Last update: 2020-01-16 17:51    [W:0.587 / U:0.044 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site