diff options
| author | Peter P Waskiewicz Jr <peter.p.waskiewicz.jr@intel.com> | 2009-05-17 12:34:55 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2009-05-17 21:04:13 -0700 |
| commit | 70b77628d8d943b27cc0f72002b5884028aee38c (patch) | |
| tree | 2ec860afd630101664f3cdafd4a32ece4e4d9f60 | |
| parent | 63f39bd17aa700595fa3e34a61c5c07551dd1b7d (diff) | |
ixgbe: Set Priority Flow Control low water threshhold for DCB
This sets the low water threshhold for priority flow control for 82598
and 82599 controllers in DCB mode.
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>
| -rw-r--r-- | drivers/net/ixgbe/ixgbe_common.c | 48 |
1 files changed, 37 insertions, 11 deletions
diff --git a/drivers/net/ixgbe/ixgbe_common.c b/drivers/net/ixgbe/ixgbe_common.c index af392758b2b..530da909dc7 100644 --- a/drivers/net/ixgbe/ixgbe_common.c +++ b/drivers/net/ixgbe/ixgbe_common.c @@ -1589,6 +1589,13 @@ s32 ixgbe_fc_enable(struct ixgbe_hw *hw, s32 packetbuf_num) u32 mflcn_reg; u32 fccfg_reg; u32 reg; + u32 rx_pba_size; + +#ifdef CONFIG_DCB + if (hw->fc.requested_mode == ixgbe_fc_pfc) + goto out; + +#endif /* CONFIG_DCB */ mflcn_reg = IXGBE_READ_REG(hw, IXGBE_MFLCN); mflcn_reg &= ~(IXGBE_MFLCN_RFCE | IXGBE_MFLCN_RPFCE); @@ -1651,21 +1658,40 @@ s32 ixgbe_fc_enable(struct ixgbe_hw *hw, s32 packetbuf_num) IXGBE_WRITE_REG(hw, IXGBE_MFLCN, mflcn_reg); IXGBE_WRITE_REG(hw, IXGBE_FCCFG, fccfg_reg); - /* Set up and enable Rx high/low water mark thresholds, enable XON. */ - if (hw->fc.current_mode & ixgbe_fc_tx_pause) { - if (hw->fc.send_xon) - IXGBE_WRITE_REG(hw, IXGBE_FCRTL_82599(packetbuf_num), - (hw->fc.low_water | IXGBE_FCRTL_XONE)); - else - IXGBE_WRITE_REG(hw, IXGBE_FCRTL_82599(packetbuf_num), - hw->fc.low_water); + reg = IXGBE_READ_REG(hw, IXGBE_MTQC); + /* Thresholds are different for link flow control when in DCB mode */ + if (reg & IXGBE_MTQC_RT_ENA) { + rx_pba_size = IXGBE_READ_REG(hw, IXGBE_RXPBSIZE(packetbuf_num)); - IXGBE_WRITE_REG(hw, IXGBE_FCRTH_82599(packetbuf_num), - (hw->fc.high_water | IXGBE_FCRTH_FCEN)); + /* Always disable XON for LFC when in DCB mode */ + reg = (rx_pba_size >> 2) & 0xFFE0; + if (hw->fc.current_mode & ixgbe_fc_tx_pause) + reg |= IXGBE_FCRTH_FCEN; + IXGBE_WRITE_REG(hw, IXGBE_FCRTH_82599(packetbuf_num), reg); + } else { + /* + * Set up and enable Rx high/low water mark thresholds, + * enable XON. + */ + if (hw->fc.current_mode & ixgbe_fc_tx_pause) { + if (hw->fc.send_xon) { + IXGBE_WRITE_REG(hw, + IXGBE_FCRTL_82599(packetbuf_num), + (hw->fc.low_water | + IXGBE_FCRTL_XONE)); + } else { + IXGBE_WRITE_REG(hw, + IXGBE_FCRTL_82599(packetbuf_num), + hw->fc.low_water); + } + + IXGBE_WRITE_REG(hw, IXGBE_FCRTH_82599(packetbuf_num), + (hw->fc.high_water | IXGBE_FCRTH_FCEN)); + } } /* Configure pause time (2 TCs per register) */ - reg = IXGBE_READ_REG(hw, IXGBE_FCTTV(packetbuf_num)); + reg = IXGBE_READ_REG(hw, IXGBE_FCTTV(packetbuf_num / 2)); if ((packetbuf_num & 1) == 0) reg = (reg & 0xFFFF0000) | hw->fc.pause_time; else |