linux-kernel - Re: Linux script to enable ASPM / Documentation for ASPM

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Message-ID: <AANLkTilcEZDsWTWBjrXIgiIaBPWZN5k-RMhFE6VvVlhc@mail.gmail.com>
Date:	Mon, 21 Jun 2010 16:02:20 -0700
From:	"Luis R. Rodriguez" <mcgrof@...il.com>
To:	linux-kernel@...r.kernel.org
Cc:	linux-wireless <linux-wireless@...r.kernel.org>,
	Martin Mares <mj@....cz>
Subject: Re: Linux script to enable ASPM / Documentation for ASPM

On Mon, Jun 21, 2010 at 3:58 PM, Luis R. Rodriguez <mcgrof@...il.com> wrote:
> ASPM was a dark magic when I first started looking at it. Some of it
> is still dark but what I was able to understand with the help of
> colleagues at work I've managed to stash here for now:
>
> http://wireless.kernel.org/en/users/Documentation/ASPM
>
> Then enabling ASPM was also quite a challenge and I always had to go
> back and revisit the procedures, so to help with that instead I wrote
> a script to do this for you correctly:
>
> http://kernel.org/pub/linux/kernel/people/mcgrof/aspm/enable-aspm
>
> Its sha1sum is: f5804fdab512065f219e55addf78c6654f1fc045
>
> If any of that looks confusing refer to the documentation above.
>
> There's a TODO there, so I'll get to the different items when I can
> but if you like feel free to send me patches as well:
>
>  TODO: patches are welcomed to me until we submit to to
>       PCI Utilities upstream.
>
>  This can be improved by in this order:
>
>        * Accept arguments for endpoint and root complex address, and
>          desired ASPM settings
>        * Look for your ASPM capabilities by quering your
>          LnkCap register first. Use these values to let you
>          select whether you want to enable only L1 or L1 & L0s
>        * Searching for your root complex for you
>        * Search for your PCI device by using the driver
>        * Disable your driver and ask to reboot ?
>        * Rewrite in C
>        * Write ncurses interface [ wishlist ]
>        * Write GTK/QT interface [ wishlist ]
>        * Submit upstream as aspm.c to the PCI Utilities, which are
>          maintained by Martin Mares <mj@....cz>

Come to think of it, would this be welcomed upstream in the PCI utils
as is for now?

  Luis
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