[Intel-wired-lan] [PATCH v3] ixgbe: Manual AN-37 for troublesome link partners for X550 SFI

[Switzer, David]

>-----Original Message-----
>From: Daly, Jeff <jeffd at silicom-usa.com>
>Sent: Thursday, July 21, 2022 7:11 AM
>To: intel-wired-lan at osuosl.org
>Cc: Brandeburg, Jesse <jesse.brandeburg at intel.com>; Nguyen, Anthony L
><anthony.l.nguyen at intel.com>; David S. Miller <davem at davemloft.net>;
>Jakub Kicinski <kuba at kernel.org>; intel-wired-lan at lists.osuosl.org;
>netdev at vger.kernel.org; linux-kernel at vger.kernel.org
>Subject: [PATCH v3] ixgbe: Manual AN-37 for troublesome link partners for
>X550 SFI
>
>Some (Juniper MX5) SFP link partners exhibit a disinclination to autonegotiate
>with X550 configured in SFI mode.  This patch enables a manual AN-37 restart
>to work around the problem.
>
>Signed-off-by: Jeff Daly <jeffd at silicom-usa.com>
>---
> drivers/net/ethernet/intel/ixgbe/ixgbe_type.h |  3 +
>drivers/net/ethernet/intel/ixgbe/ixgbe_x550.c | 56 ++++++++++++++++++-
> 2 files changed, 56 insertions(+), 3 deletions(-)

We don't have the specific link partner that this patch fixes, but we have verified that AN wasn't hindered or broken with the link partners that we have.

Tested-by: Dave Switzer <david.switzer at intel.com>