[PATCH 07/20] tg3: Improve 5785 PCIe performance
From: Matt Carlson <hidden>
Date: 2009-11-03 01:33:19
Subsystem:
networking drivers, the rest · Maintainers:
Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
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 <redacted> 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
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1.6.4.4