[ofw] Expose a vendor defined device in ibbus?

[Fab Tillier]

> Two comments:
>
> The format written in the registry should be extensible.  That is,
> each vendor ULP will be able to add more fields if it needs them. I
> guess that the format that Fab has suggested is already such.

How would the bus driver act on these extra fields?  How would the FDO driver retrieve these extra parameters form the bus driver?

> Another thing is that ipoib should also work in this method. This
> means that the coinstaller that installs the bus filter should also
> create the needed registry entries for ipoib.

Since the bus driver is an upper filter for the HCA now, it's possible for the INF file of the HCA to append the appropriate values to the bus driver's child device registry entry when the HCA is installed without a coinstaller at all.

-Fab