Techwizz/kernel-fxtec-pro1x
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity

ixgbe: Fix disabling of relaxed ordering with Tx DCA

Browse source 
82599 has a different register offset for the Tx DCA control registers.
We disable relaxed ordering of the descriptor writebacks for Tx head
writeback, but didn't disable it properly for 82599.  However, this
shouldn't be a visible issue, since ixgbe doesn't use Tx head writeback.
This patch just makes sure we're not doing blind writes to offsets we
don't expect.

Signed-off-by: Peter P Waskiewicz Jr <peter.p.waskiewicz.jr@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Peter P Waskiewicz Jr 2009-09-30 12:07:16 +00:00 committed by David S. Miller
parent 8c185ab618
commit 84f62d4b58
1 changed files with 20 additions and 3 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

23
drivers/net/ixgbe/ixgbe_main.c
View file

@ -1885,12 +1885,29 @@ static void ixgbe_configure_tx(struct ixgbe_adapter *adapter)
IXGBE_WRITE_REG(hw, IXGBE_TDT(j), 0);
adapter->tx_ring[i].head = IXGBE_TDH(j);
adapter->tx_ring[i].tail = IXGBE_TDT(j);
/* Disable Tx Head Writeback RO bit, since this hoses
/*
* Disable Tx Head Writeback RO bit, since this hoses
* bookkeeping if things aren't delivered in order.
*/
txctrl = IXGBE_READ_REG(hw, IXGBE_DCA_TXCTRL(j));
switch (hw->mac.type) {
case ixgbe_mac_82598EB:
txctrl = IXGBE_READ_REG(hw, IXGBE_DCA_TXCTRL(j));
break;
case ixgbe_mac_82599EB:
default:
txctrl = IXGBE_READ_REG(hw, IXGBE_DCA_TXCTRL_82599(j));
break;
}
txctrl &= ~IXGBE_DCA_TXCTRL_TX_WB_RO_EN;
IXGBE_WRITE_REG(hw, IXGBE_DCA_TXCTRL(j), txctrl);
switch (hw->mac.type) {
case ixgbe_mac_82598EB:
IXGBE_WRITE_REG(hw, IXGBE_DCA_TXCTRL(j), txctrl);
break;
case ixgbe_mac_82599EB:
default:
IXGBE_WRITE_REG(hw, IXGBE_DCA_TXCTRL_82599(j), txctrl);
break;
}
}
if (hw->mac.type == ixgbe_mac_82599EB) {
/* We enable 8 traffic classes, DCB only */