> >> + if (is_cxl_root(parent_port)) {
> >> + ctx->port = parent_port;
> >> + cxl_coordinates_combine(ctx->coord, ctx->coord,
> >> + dport->coord);
> >
> > I'm a bit lost in all the levels of iteration so may have missed it.
> >
> > Do we assume that GP BW (which is the root bridge) is shared across multiple root
> > ports on that host bridge if they are both part of the interleave set?
>
> Do we need to count the number of RPs under a HB and do min(aggregated_RPs_BW, (GP_BW / no of RPs) * affiliated_RPs_in_region)?
I'm not 100% sure I understand the question.
Taking this again and expanding it another level.
Host CPU
______________________________________
| |
| |
| 3 from GP/HMAT | 3 from GP/HMAT
_____|_____ _______|______
RP RP RP RP
2| |2 2| |2
__|__ ___|__ __|___ __|____
|1 |1 1| |1 |1 |1 |1 |1
EP EP EP EP EP EP EP EP
Then your maths
aggregated RPs BW is 8
(GP_BW/no of RPS) * affliated RPS in region.
= (3/2 * 4)
= 6
Which is correct. So yes, I think that works if we assume everything is balanced.
I'm fine with that assumption as that should be the common case.
Jonathan
