summaryrefslogtreecommitdiff
diff options
context:
space:
mode:
authorMatt Carlson <mcarlson@broadcom.com>2009-11-02 14:26:03 +0000
committerDavid S. Miller <davem@davemloft.net>2009-11-02 23:39:03 -0800
commit788a035e6061a66c6c77059c417fdc6234e140ff (patch)
tree594df5b1f962b98fb3bc514dc1bf435a9ec58ccf
parenta21771dd189b340328c573da9e005068e8a74c53 (diff)
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 <mcarlson@broadcom.com> Reviewed-by: Michael Chan <mchan@broadcom.com> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--drivers/net/tg3.c3
-rw-r--r--drivers/net/tg3.h3
2 files changed, 5 insertions, 1 deletions
diff --git a/drivers/net/tg3.c b/drivers/net/tg3.c
index 54dbe988f5f1..a43ef2b3a530 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 530c36b23e80..68431da5aad3 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