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From: John Baldwin <jhb@freebsd.org>
To: Maksim Yevmenkin <emax@freebsd.org>
Subject: Re: svn commit: r241616 - in head/sys: dev/ixgbe net
Date: Tue, 16 Oct 2012 17:02:06 -0400
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On Tuesday, October 16, 2012 4:18:16 pm Maksim Yevmenkin wrote:
> Author: emax
> Date: Tue Oct 16 20:18:15 2012
> New Revision: 241616
> URL: http://svn.freebsd.org/changeset/base/241616
> 
> Log:
>   introduce concept of ifi_baudrate power factor. the idea is to work
>   around the problem where high speed interfaces (such as ixgbe(4))
>   are not able to report real ifi_baudrate. bascially, take a spare
>   byte from struct if_data and use it to store ifi_baudrate power
>   factor. in other words,
>   
>   real ifi_baudrate = ifi_baudrate * 10 ^ ifi_baudrate power factor
>   
>   this should be backwards compatible with old binaries. use ixgbe(4)
>   as an example on how drivers would set ifi_baudrate power factor
>   
>   Discussed with:	kib, scottl, glebius
>   MFC after:	1 week

It would be a lot nicer if you could still allow one to use more
readable things like IF_Gbps(10).  Note that we do have a 40G driver
(mlxen) as well.

Maybe a helper 'if_set_baudrate(ifp, IF_Gbps(10))' that would DTRT.
(It could be a static inline or some such).  I would just like to
keep the readability.

-- 
John Baldwin