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Date: Wed, 27 Nov 2002 16:41:18 -0500 (EST)
From: "Richard B. Johnson" <root@chaos.analogic.com>
Reply-To: root@chaos.analogic.com
To: Chris Friesen <cfriesen@nortelnetworks.com>
cc: linux-kernel@vger.kernel.org
Subject: Re: how to list pci devices from userpace?  anything better than /proc/bus/pci/devices?
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On Wed, 27 Nov 2002, Chris Friesen wrote:

> 
> I have a situation where the userspace app needs to be able to deal with 
>   two different models of hardware, each of which uses a slightly 
> different api.
> 
> Is there any way that I can query the pci vendor/device numbers without 
> having to parse ascii files in /proc?
> 
> Thanks,
> 
> Chris

Red Hat distributions after 7.0 provide `lspci`. You still have
to parse ASCII. FYI, it's not hard to write a 'C' program
that directly accessed the PCI bus from its ports at 0xCF8 (index)
and 0xCFC (data). You need to do 32-bit port accesses and you
can set iopl(3) from user-space.

If you want to 'roll-your-own', I can send you some code to
use as a template.


Cheers,
Dick Johnson
Penguin : Linux version 2.4.18 on an i686 machine (797.90 BogoMips).
   Bush : The Fourth Reich of America


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