pci <-> device node mapping

Dave Engebretsen engebret at vnet.ibm.com
Thu Jun 19 23:08:10 EST 2003

Benjamin Herrenschmidt wrote:
> On Wed, 2003-06-18 at 21:36, Todd Inglett wrote:
> > The device_node contains a ptr to the tce table.  I suppose sysdata
> > could point directly to it, or you could invent some other external
> > means to find it.
> Do you rely on this direct pointer in performance critical locations ?

It is used for each call where TCE mappings are created, so it is on a
pretty high use path.


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