On Thu, Jan 31, 2008 at 02:30:13PM +0800, Zhang Wei wrote:

quoted

-----Original Message-----
From: Kumar Gala [mailto:galak@kernel.crashing.org] 
when we have multiple ports are the device IDs on the ports intended  
to be unique only to a port or unique across all ports?

I consider each RIO controller will has its own network, the device IDs
should be
unique only in its port network.

This is a bad assumption IMHO. It pushes policy on to the system
designer of a RapidIO network.

It is very possible to use multiple controllers as entry points
in a single RapidIO network fabric space. The reason one would do this
is to provide optimized paths to some endpoints in the system.

If possible, there should never be a policy assumption like this in
kernel space. It's much better to assume that one may or may not
have a unique id space.

-Matt