linux-kernel - Re: [PATCH 2/2] vga: drops a documentation regarding the VGA arbiter

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Message-ID: <20090718114817.GD1433@ucw.cz>
Date:	Sat, 18 Jul 2009 13:48:17 +0200
From:	Pavel Machek <pavel@....cz>
To:	Tiago Vignatti <tiago.vignatti@...ia.com>
Cc:	Jesse Barnes <jbarnes@...tuousgeek.org>,
	Dave Airlie <airlied@...hat.com>, linux-pci@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/2] vga: drops a documentation regarding the VGA
	arbiter


> +I. Details and Theory of Operation
> +==================================
> +
> +I.1 vgaarb
> +----------
> +
> +The vgaarb is a module of the Linux Kernel. When it is initially loaded, it
> +scans all PCI devices and add the VGA ones inside the arbitration. The arbiter

and adds?


> +If the device is hot-{un,}plugged, there is a hook inside the module to notify
> +them being added/removed in the system and automatically added/removed in
> +the arbiter.

I don't see who's 'them' here.

> +I.2 libpciaccess
> +----------------
> +
> +To use the vga arbiter char device it was implemented a serie of functions

series?

> +inside the pciaccess library. Two fields were added to struct pci_device for
> +this be possible:
> +
> +    /* the type of resource decoded by the device */
> +    int vgaarb_rsrc;
> +    /* the file descriptor (/dev/vga_arbiter) */
> +    int vgaarb_fd;
> +
> +
> +and the functions:
> +

What functions?

-- 
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(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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