Re: Going beyond 256 PCI buses

[Jeff Garzik <jgarzik@mandrakesoft.com>]

"David S. Miller" wrote:
> 
> Jeff Garzik writes:
>  > Thinking a bit more independently of bus type, and with an eye toward's
>  > 2.5's s/pci_dev/device/ and s/pci_driver/driver/, would it be useful to
>  > go ahead and codify the concept of PCI domains into a more generic
>  > concept of bus tree numbers?  (or something along those lines)  That
>  > would allow for a more general picture of the entire system's device
>  > tree, across buses.
>  >
>  > First sbus bus is tree-0, first PCI bus tree is tree-1, second PCI bus
>  > tree is tree-2, ...
> 
> If you're going to do something like this, ie. true hierarchy, why not
> make one tree which is "system", right? Use /proc/bus/${controllernum}
> ala:
> 
> /proc/bus/0/type        --> "sbus", "pci", "zorro", etc.
> /proc/bus/0/*           --> for type == "pci" ${bus}/${dev}.${fn}
>                             for type == "sbus" ${slot}
>                             ...
> 
> How about this?

ok with me.  would bus #0 be the system or root bus?  that would be my
preference, in a tiered system like this.

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