On Sat, Jun 24, 2017 at 12:19:42PM -0700, Roopa Prabhu wrote:

From: Roopa Prabhu <redacted>

Forward Error Correction (FEC) modes i.e Base-R
and Reed-Solomon modes are introduced in 25G/40G/100G standards
for providing good BER at high speeds. Various networking devices
which support 25G/40G/100G provides ability to manage supported FEC
modes and the lack of FEC encoding control and reporting today is a
source for itneroperability issues for many vendors.

interoperability. The same typ0 exists in the first patch

FEC capability as well as specific FEC mode i.e. Base-R
or RS modes can be requested or advertised through bits D44:47 of base link
codeword.

For my own education, is this logically a MAC or a PHY thing?  Is the
negotiation performed at the PHY level, and then FEC happens at the
MAC level?

I'm just trying to look ahead when we start getting 25G/40G/100G PHY
support. Does phylib need an extension, similar to how pause is
negotiated at the PHY, and then the MAC does the actual work?

	 Andrew