diff options
| author | Michael Chan <mchan@broadcom.com> | 2007-02-13 12:17:03 -0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2007-02-13 12:17:03 -0800 |
| commit | 49afdeb65bb917e22cf9116bc31380befe9db890 (patch) | |
| tree | 1e9ef01eb288712cd064a1ec723dbdf751162388 /drivers | |
| parent | 436f137975507b0baab0859a253c3c9332c22f62 (diff) | |
[TG3]: Use lower DMA watermark for 5703.
Set DMA read watermark to 4 on 5703 in PCIX mode. This is needed to
prevent some tx timeouts.
Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/net/tg3.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/drivers/net/tg3.c b/drivers/net/tg3.c index 0b5b8e7f55a..2df343f4820 100644 --- a/drivers/net/tg3.c +++ b/drivers/net/tg3.c @@ -11314,6 +11314,7 @@ static int __devinit tg3_test_dma(struct tg3 *tp) if (GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5703 || GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5704) { u32 ccval = (tr32(TG3PCI_CLOCK_CTRL) & 0x1f); + u32 read_water = 0x7; /* If the 5704 is behind the EPB bridge, we can * do the less restrictive ONE_DMA workaround for @@ -11325,8 +11326,13 @@ static int __devinit tg3_test_dma(struct tg3 *tp) else if (ccval == 0x6 || ccval == 0x7) tp->dma_rwctrl |= DMA_RWCTRL_ONE_DMA; + if (GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5703) + read_water = 4; /* Set bit 23 to enable PCIX hw bug fix */ - tp->dma_rwctrl |= 0x009f0000; + tp->dma_rwctrl |= + (read_water << DMA_RWCTRL_READ_WATER_SHIFT) | + (0x3 << DMA_RWCTRL_WRITE_WATER_SHIFT) | + (1 << 23); } else if (GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5780) { /* 5780 always in PCIX mode */ tp->dma_rwctrl |= 0x00144000; |