[ofw] RE: Possible IPoIB DMA problems

[Alex Estrin]

> -----Original Message-----
> From: Fab Tillier [mailto:ftillier at windows.microsoft.com] 
> Sent: Thursday, August 21, 2008 12:44 PM
> To: Alex Estrin; Anh Duong; ofw at lists.openfabrics.org
> Cc: Stan C. Smith; John Russo; Tzachi Dar; Usha Srinivasan
> Subject: RE: Possible IPoIB DMA problems
> 
> 
> 
> >From: Alex Estrin [mailto:alex.estrin at qlogic.com]
> >Sent: Thursday, August 21, 2008 9:28 AM
> >
> >From your examples ... these are the places where 
> appropriate physical
> >address is taken from virtual.
> >preparing send WR.
> 
> The physical address returned is CPU-relative, not bus 
> relative.  These can be different, but generally have not 
> been on x86/x64 platforms.

It should be fine as long as CPU and bus mapped to the same address
space.

> -Fab
>