Re: [PATCH 0/5][RFC] Physical PCI slot objects

Kenji Kaneshige
2007-11-14T10:00:33Z

Matthew Wilcox ????????:
> On Tue, Nov 13, 2007 at 03:33:14PM -0800, Kristen Carlson Accardi wrote:
>> As far as being able to retrieve the slot number (which it seemed from
>> the HP manageablity application perspective is the goal here), that
>> information is available from userspace as well for at least standard PCI
>> and pcie based systems for occupied slots. For standard pci, you have
>> to make something up anyway - for shpchp we just use an incremental
>> number and combine it with the bus number to represent the slot. For
>> pcie, you can get this info from the slot capabilities register.
>
> Ummm ... that's not what the /spec/ says. I've never worked on any shpc
> machines, but the shpc driver reads the slot values from the SLOT_CONFIG
> register, just like the spec says to.
>

The slot number for shpc slot is like 'YYYY_XXXX'.

YYYY is the bus number, though I don't know the specific reason
why it was added.

XXXX is slot number decided according to the shpc specification,
as you said.

Thanks,
Kenji Kaneshige