Re: pci_domain_nr vs. /sys/devices

Matthew Wilcox
2003-06-11T14:34:25Z

On Wed, Jun 11, 2003 at 04:30:42PM +0200, Benjamin Herrenschmidt wrote:
> The new pci_domain_nr() is good for adding the PCI domain number to
> the /sys/devices/pciN/* names, but I think that's not the proper
> representation. It should really be
>
> /sys/devices/pci-domainN/pciN/*
>
> So we can pave the way for when we'll stop play bus number tricks and
> actually have overlapping PCI bus numbers between domains. (I don't plan
> to do that immediately because that would break userland & /proc/bus/pci
> backward compatiblity)
>
> What do you think ?

I don't think sysfs works like that (please correct me if I've
misunderstood, mochel..)

Look in /sys/bus/pci/devices/ There you have all the PCI devices
lumped together in one place, and we obviously need the domain number
in the name. I don't know where the 0 on the end of /sys/devices/pci0/
comes from, but if we could, I wouldn't say no to:

/sys/devices/pciDDDD/DDDD:BB:SS.F
or
/sys/devices/pciDDDD:BB/DDDD:BB:SS.F
(Domain,Bus,Slot,Func)

I don't think the extra level of hierarchy in your suggestion is necessary
or particularly desirable.

--
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