[openib-general] Re: [PATCH 5 of 13] ipath - use proper address translation routine

[Alan Cox]

On Maw, 2006-05-02 at 07:24 -0700, Roland Dreier wrote:
> But see my earlier mail to Arjan about RDMA -- what address can a
> protocol (eg SRP initiator) put in a message that the other side will
> use to initiate a remote DMA operation?  It seems to me it has to be a
> bus address, and that means that the protocol has to do the DMA mapping.

For most drivers properly, but you are making assumptions again. Why
can't a driver which is doing its own mapping not also do its own rdma
cookie handling ? You opt out of mapping being done for you, then you
get opted out of defaults for other stuff too.

Alan