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ixgbevf: Change the relaxed order settings in VF driver for sparc

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We noticed performance issues with VF interface on sparc compared
to PF. Setting the RX to IXGBE_DCA_RXCTRL_DATA_WRO_EN brings it
on far with PF. Also this matches to the default sparc setting in
PF driver.

Signed-off-by: Babu Moger <babu.moger@oracle.com>
Acked-by: Sowmini Varadhan <sowmini.varadhan@oracle.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
This commit is contained in:
Babu Moger 2016-04-21 15:56:49 -07:00 committed by Jeff Kirsher
parent 45a88dfcd8
commit 33b0eb1596
1 changed files with 6 additions and 0 deletions
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6
drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c
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@ -1760,9 +1760,15 @@ static void ixgbevf_configure_rx_ring(struct ixgbevf_adapter *adapter,
IXGBE_WRITE_REG(hw, IXGBE_VFRDLEN(reg_idx),
ring->count * sizeof(union ixgbe_adv_rx_desc));
#ifndef CONFIG_SPARC
/* enable relaxed ordering */
IXGBE_WRITE_REG(hw, IXGBE_VFDCA_RXCTRL(reg_idx),
IXGBE_DCA_RXCTRL_DESC_RRO_EN);
#else
IXGBE_WRITE_REG(hw, IXGBE_VFDCA_RXCTRL(reg_idx),
IXGBE_DCA_RXCTRL_DESC_RRO_EN |
IXGBE_DCA_RXCTRL_DATA_WRO_EN);
#endif
/* reset head and tail pointers */
IXGBE_WRITE_REG(hw, IXGBE_VFRDH(reg_idx), 0);