tree 2d9a80861ab57e4c3e24b17e5d828223658cb334
parent da4dd0f7ca3fa667b7bba5fd34adceaf3fb84a9b
author Peter P Waskiewicz Jr <peter.p.waskiewicz.jr@intel.com> 1244113853 +0000
committer David S. Miller <davem@davemloft.net> 1244377218 -0700

ixgbe: Harden the 82599 multispeed fiber autotry mechanism

82599 supports multispeed fiber optical modules (10Gbps/1Gbps).  Some
scenarios can cause the autotry mechanism to not negotiate link properly.
What needs to happen is the driver must flap the Tx laser to induce an Rx
Loss of Signal on the link partner.  This will restart the autotry
mechanism to get link into a known state.  The software definable pin (SDP)
3 on the 0x10fb NIC is wired to cause a Tx LOS event, which triggers the
Rx LOS we require.

Signed-off-by: Peter P Waskiewicz Jr <peter.p.waskiewicz.jr@intel.com>
Acked-by: Mallikarjuna R Chilakala <mallikarjuna.chilakala@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>