[PATCH 5/8] [SCSI] mvsas: change SL mode0 register value

yxlraid
2011-09-28T16:35:19Z

-- change connection behavior
-- set bit8 to 1 for performance tuning
-- set bit0 to 0 to enable retry for no_dest reject case.

Signed-off-by: Xiangliang Yu <yuxiangl@marvell.com>
---
drivers/scsi/mvsas/mv_94xx.c | 8 ++++++++
1 files changed, 8 insertions(+), 0 deletions(-)

diff --git a/drivers/scsi/mvsas/mv_94xx.c b/drivers/scsi/mvsas/mv_94xx.c
index ca2b9d9..4d1a8c7 100644
--- a/drivers/scsi/mvsas/mv_94xx.c
+++ b/drivers/scsi/mvsas/mv_94xx.c
@@ -511,6 +511,14 @@ static int __devinit mvs_94xx_init(struct mvs_info *mvi)
tmp |= CINT_PHY_MASK;
mw32(MVS_INT_MASK, tmp);

+ /* change the connection open-close behavior (bit 9)
+ * set bit8 to 1 for performance tuning */
+ tmp = mvs_cr32(mvi, CMD_SL_MODE0);
+ tmp |= 0x00000300;
+ /* set bit0 to 0 to enable retry for no_dest reject case */
+ tmp &= 0xFFFFFFFE;
+ mvs_cw32(mvi, CMD_SL_MODE0, tmp);
+
/* Enable SRS interrupt */
mw32(MVS_INT_MASK_SRS_0, 0xFFFF);

--
1.7.4.4