netdev - [RFC] Support for unidirectional ethernet links

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Date:	Fri, 27 Aug 2010 15:42:16 -0400
From:	Kyle Moffett <Kyle.D.Moffett@...ing.com>
To:	linux-kernel@...r.kernel.org
Cc:	Kyle Moffett <kyle@...fetthome.net>,
	Stephen Hemminger <shemminger@...ux-foundation.org>,
	netdev@...r.kernel.org
Subject: [RFC] Support for unidirectional ethernet links

Hello,

I'm in the process of dusting off some old unidirectional fiber link
patches as part of support for a new custom hardware chassis.

Specifically, a critical piece of the hardware is unidirectional fiber
connections between independent computers, with data transmission
performed using UDP to a static ARP entry.

These first 2 RFC patches provide support for off-the-shelf gigabit
sky2 boards.  I also have another fairly trivial patch to "ethtool"
which enables it to configure the new ethtool values.

If these patches are acceptable, I'm going to polish up and refine a
more invasive series which cleans up and extends some of the PHY
ethtool handling to allow PHYs to handle the unidirectional modes in
a driver-specific way.

Cheers,
Kyle Moffett

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