From: Rene Herman <rene.herman@keyaccess.nl>
To: Rajat Jain <Rajat.Jain@infogain.com>
Cc: linux-newbie@vger.kernel.org, kernelnewbies@nl.linux.org
Subject: Re: Who decides PCI device number?
Date: Wed, 06 Aug 2008 19:49:13 +0200 [thread overview]
Message-ID: <4899E419.80507@keyaccess.nl> (raw)
In-Reply-To: <C86899CCB10A6C4E93D5978DCB232D4B09002FD5@GDCMX01.igglobal.com>
On 06-08-08 07:54, Rajat Jain wrote:
> In the PCI addess (domain + PCI bus num + PCI Device num + function num)
> of a PCI device, who decides the PCI device number assigned to a PCI
> device?
>
> - Is it hard wired for a particular PCI slot? (So that any PCI card
> plugged into this slot will always have a particular PCI device number).
Yes, for a definition of "hard-wired" which if I'm not mistaken (which I
might be, but believe I remember reading that once) includes the
possibility for busses to change numbering depending on bridge detection
order.
But yes, the "dd" in the DDDD:bb:dd.f lspci -D output indeed signifies
the slot, not the card -- exchange two PCI cards in your system and see
them change numbering around as well.
> -Or is it hardwired on the PCI card? (So that this card if plugged on
> any slot in any machine will have the same PCI device number)?
No.
Rene.
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prev parent reply other threads:[~2008-08-06 17:49 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-08-06 5:54 Who decides PCI device number? Rajat Jain
2008-08-06 17:49 ` Rene Herman [this message]
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