/proc/bus/pci Question

[Steven Ness]

Hi Martin,

Thanks again for your input.  I'll look into libpci again.


Steven.

On Tue, 25 Jan 2000, Martin Mares wrote:

> Hi,
> 
> > On my system, in /proc/bus/pci, there are two directories, "00" and "01",
> > I assume these represent the first and second PCI busses on my system.  
> > My question is, what do the files in these directories do?
> 
>    These files contain full configuration space of the corresponding
> devices.
> 
> > Also, a possibly related question:  Is there any way to get the
> > pci_devices dev->class field from userspace?  I notice that the new
> > /proc/bus/pci/devices file has a lot of information, but doesn't include
> > the class type (e.g. Storage, Video).  I see that this information is
> > present in /proc/pci, but my understanding is that /proc/pci is
> > obsolete.  Any easy way to get this information?
> 
>    Yes, you can read it from the configuration registers mapped as files.
> Anyway, it's much better to use the libpci library from the pciutils
> package (ftp://atrey.karlin.mff.cuni.cz/pub/linux/pci/pciutils-2.1.4.tar.gz)
> for this purpose -- it provides a clean interface for accessing of PCI
> registers and uses the appropriate low-level functions according to the
> OS, libraries and CPU you have.
> 
> 				Have a nice fortnight
> -- 
> Martin `MJ' Mares <mj en ucw.cz> <mj en suse.cz> http://atrey.karlin.mff.cuni.cz/~mj/
> "REALITY.SYS corrupted - reboot Universe (Y/N)?"
> 


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