[ewg] RDS problematic on RC2

[Ralph Campbell]

Attached is the patch I sent to Olaf.
It basically exchanges calls like dma_map_sg() to ib_dma_map_sg()
so that the InfiniPath driver can intercept the DMA mapping
calls and use kernel virtual addresses instead of physical addresses.
The InfiniPath driver uses the host CPU to copy data in most cases
instead of DMA.  I doubt this will fix or change the other issues
Olaf is working on for RDS.

On Thu, 2008-01-17 at 14:06 +0200, Or Gerlitz wrote:
> Johann George wrote:
> >> Oh, and if you're using RDMA - does this happen to be with
> >> qlogic HCAs?  If so, I just received a patch from Ralph
> >> Campbell with some fixes to the way we set up out DMA
> >> mapping.
> > 
> > RDS in OFED 1.3 does not currently work on the QLogic HCAs
> > due to the way you are setting up DMA mapping.  We already
> > discovered that and the patch that Ralph sent will hopefully
> > fix the problem.
> 
> Olaf, Johan, may we (rds-devel) see the patch from Ralph?
> 
> Or.
> 
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