From: yxlraid@gmail.com
To: JBottomley@parallels.com
Cc: jack_wang@usish.com, lucas.demarchi@profusion.mobi,
maciej.trela@intel.com, dan.j.williams@intel.com,
linux-scsi@vger.kernel.org, linux-kernel@vger.kernel.org,
Xiangliang Yu <yuxiangl@marvell.com>
Subject: [PATCH 6/8] [SCSI] mvsas: expander write performance enhancement
Date: Thu, 29 Sep 2011 00:34:55 -0700 [thread overview]
Message-ID: <4e834cda.e515440a.102b.0ea3@mx.google.com> (raw)
In-Reply-To: <mvsas>
From: Xiangliang Yu <yuxiangl@marvell.com>
-- with 1 expander, connect 8 HDD, the write performance will be
improved by 80%.
Signed-off-by: Xiangliang Yu <yuxiangl@marvell.com>
---
drivers/scsi/mvsas/mv_94xx.c | 9 +++++++++
drivers/scsi/mvsas/mv_defs.h | 1 +
2 files changed, 10 insertions(+), 0 deletions(-)
diff --git a/drivers/scsi/mvsas/mv_94xx.c b/drivers/scsi/mvsas/mv_94xx.c
index 4d1a8c7..ba667db 100644
--- a/drivers/scsi/mvsas/mv_94xx.c
+++ b/drivers/scsi/mvsas/mv_94xx.c
@@ -511,6 +511,15 @@ static int __devinit mvs_94xx_init(struct mvs_info *mvi)
tmp |= CINT_PHY_MASK;
mw32(MVS_INT_MASK, tmp);
+ /* tune STP performance */
+ tmp = 0x003F003F;
+ mvs_cw32(mvi, CMD_PL_TIMER, tmp);
+
+ /* This can improve expander large block size seq write performance */
+ tmp = mvs_cr32(mvi, CMD_PORT_LAYER_TIMER1);
+ tmp |= 0xFFFF007F;
+ mvs_cw32(mvi, CMD_PORT_LAYER_TIMER1, tmp);
+
/* change the connection open-close behavior (bit 9)
* set bit8 to 1 for performance tuning */
tmp = mvs_cr32(mvi, CMD_SL_MODE0);
diff --git a/drivers/scsi/mvsas/mv_defs.h b/drivers/scsi/mvsas/mv_defs.h
index dec7cad..8e21482 100644
--- a/drivers/scsi/mvsas/mv_defs.h
+++ b/drivers/scsi/mvsas/mv_defs.h
@@ -387,6 +387,7 @@ enum sas_cmd_port_registers {
CMD_SL_MODE0 = 0x1BC, /* SL Mode 0 */
CMD_SL_MODE1 = 0x1C0, /* SL Mode 1 */
CMD_PND_FIFO_CTL1 = 0x1C4, /* Pending FIFO Control 1 */
+ CMD_PORT_LAYER_TIMER1 = 0x1E0, /* Port Layer Timer 1 */
};
enum mvs_info_flags {
--
1.7.4.4
next prev parent reply other threads:[~2011-09-29 7:34 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <mvsas>
2011-09-29 7:32 ` [PATCH 1/8] [SCSI] mvsas: fix expander link error yxlraid
2011-09-29 7:33 ` [PATCH 2/8] [SCSI] mvsas: add support for 9480 device id yxlraid
2011-09-29 7:33 ` [PATCH 3/8] [SCSI] mvsas: fixed some disk spin up issue yxlraid
2011-09-29 7:34 ` [PATCH 4/8] [SCSI] mvsas: fixed wrong destination when hiting NAK for command frame yxlraid
2011-09-29 7:34 ` [PATCH 5/8] [SCSI] mvsas: change SL mode0 register value yxlraid
2011-09-29 7:34 ` yxlraid [this message]
2011-09-29 7:35 ` [PATCH 7/8] [SCSI] mvsas: fixed SMP request watchdog timeout issue yxlraid
2011-09-29 7:35 ` [PATCH 8/8] [SCSI] mvsas: update driver version yxlraid
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