From: "Matt Carlson" <mcarlson@broadcom.com>
To: davem@davemloft.net
Cc: netdev@vger.kernel.org, andy@greyhouse.net
Subject: [PATCH 07/20] tg3: Improve 5785 PCIe performance
Date: Mon, 2 Nov 2009 16:26:03 -0800 [thread overview]
Message-ID: <1257211996.22001@xw6200> (raw)
This patch improves 5785 performance by allowing the write DMA engine to
request larger DMA burst sizes than it otherwise would.
Signed-off-by: Matt Carlson <mcarlson@broadcom.com>
Reviewed-by: Michael Chan <mchan@broadcom.com>
---
drivers/net/tg3.c | 3 +++
drivers/net/tg3.h | 3 ++-
2 files changed, 5 insertions(+), 1 deletions(-)
diff --git a/drivers/net/tg3.c b/drivers/net/tg3.c
index 54dbe98..a43ef2b 100644
--- a/drivers/net/tg3.c
+++ b/drivers/net/tg3.c
@@ -7633,6 +7633,9 @@ static int tg3_reset_hw(struct tg3 *tp, int reset_phy)
if (tp->tg3_flags3 & TG3_FLG3_5755_PLUS)
val |= WDMAC_MODE_STATUS_TAG_FIX;
+ if (GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5785)
+ val |= WDMAC_MODE_BURST_ALL_DATA;
+
tw32_f(WDMAC_MODE, val);
udelay(40);
diff --git a/drivers/net/tg3.h b/drivers/net/tg3.h
index 530c36b..68431da 100644
--- a/drivers/net/tg3.h
+++ b/drivers/net/tg3.h
@@ -1264,8 +1264,9 @@
#define WDMAC_MODE_FIFOURUN_ENAB 0x00000080
#define WDMAC_MODE_FIFOOREAD_ENAB 0x00000100
#define WDMAC_MODE_LNGREAD_ENAB 0x00000200
-#define WDMAC_MODE_RX_ACCEL 0x00000400
+#define WDMAC_MODE_RX_ACCEL 0x00000400
#define WDMAC_MODE_STATUS_TAG_FIX 0x20000000
+#define WDMAC_MODE_BURST_ALL_DATA 0xc0000000
#define WDMAC_STATUS 0x00004c04
#define WDMAC_STATUS_TGTABORT 0x00000004
#define WDMAC_STATUS_MSTABORT 0x00000008
--
1.6.4.4
reply other threads:[~2009-11-03 1:33 UTC|newest]
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