Commit 347b5201 authored by Bruce Allan's avatar Bruce Allan Committed by Jeff Kirsher
Browse files

e1000e: fix flow-control thresholds for jumbo frames on 82579/I217/I218



The previous static flow-control thresholds were causing unnecessary pause
packets to be transmitted when jumbo frames are configured reducing the
throughput.
Signed-off-by: default avatarBruce Allan <bruce.w.allan@intel.com>
Tested-by: default avatarJeff Pieper <jeffrey.e.pieper@intel.com>
Signed-off-by: default avatarJeff Kirsher <jeffrey.t.kirsher@intel.com>
parent a8fc1891
...@@ -3724,14 +3724,17 @@ void e1000e_reset(struct e1000_adapter *adapter) ...@@ -3724,14 +3724,17 @@ void e1000e_reset(struct e1000_adapter *adapter)
break; break;
case e1000_pch2lan: case e1000_pch2lan:
case e1000_pch_lpt: case e1000_pch_lpt:
fc->high_water = 0x05C20;
fc->low_water = 0x05048;
fc->pause_time = 0x0650;
fc->refresh_time = 0x0400; fc->refresh_time = 0x0400;
if (adapter->netdev->mtu > ETH_DATA_LEN) {
pba = 14; if (adapter->netdev->mtu <= ETH_DATA_LEN) {
ew32(PBA, pba); fc->high_water = 0x05C20;
fc->low_water = 0x05048;
fc->pause_time = 0x0650;
break;
} }
fc->high_water = ((pba << 10) * 9 / 10) & E1000_FCRTH_RTH;
fc->low_water = ((pba << 10) * 8 / 10) & E1000_FCRTL_RTL;
break; break;
} }
......
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