From 788a035e6061a66c6c77059c417fdc6234e140ff Mon Sep 17 00:00:00 2001 From: Matt Carlson Date: Mon, 2 Nov 2009 14:26:03 +0000 Subject: [PATCH] tg3: Improve 5785 PCIe performance 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 Reviewed-by: Michael Chan Signed-off-by: David S. Miller --- drivers/net/tg3.c | 3 +++ drivers/net/tg3.h | 3 ++- 2 files changed, 5 insertions(+), 1 deletion(-) 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 -- 1.8.2.3