Re: [PATCH v7 15/19] PCI/P2PDMA: Document TLP-class routing

[Leon Romanovsky]

On Mon, Sep 21, 2026 at 04:16:56PM -0600, Logan Gunthorpe wrote:
> 
> 
> On 2026-09-20 05:41, Leon Romanovsky wrote:
> > +A path is bus addressable only where both directions route directly, so with
> > +nothing enabled every class is.
> 
> I don't understand the sentence.

I tried to say that we need both Requests and Completions route
directly.

Claude suggested something like that:
---------------------------------------------------------------------------
Combining the two tables gives the mapping type: a class is bus addressable
when its Request and its Completions both route directly, a blocked Request
is not supported because Translation Blocking rejects the Address Type
wherever the Request is addressed, and anything else goes through the host
bridge. With no ACS control set anywhere, every class routes directly.
---------------------------------------------------------------------------

Thanks

> 
> 
> Logan