> Aha. I looked at the code a bit.
> Basically is seems that some architectures use the dma handle
> and some the virtual address to flush the cache, that's
> where the requirement that same parameters are used for
> sync single as for map single comes from.
>
> So it seems that this requirement does not apply to s/g, and that we can just
> build a scatterlist structure and do dma_sync_sg?
The statement
synchronise a single contiguous or scatter/gather mapping. All the
parameters must be the same as those passed into the single mapping
API.
in DMA-API.txt also is clearly attached to dma_sync_sg(). So I don't
think it's a good idea to rely on being able to sync a different
scatterlist than the one that was originally mapped.
It actually doesn't look too bad to replace our use of pci_map_sg()
with dma_map_single(), at least at first glance. I'll try to write a
patch later.
- R.
_______________________________________________
general mailing list
[email protected]
http://lists.openfabrics.org/cgi-bin/mailman/listinfo/general
To unsubscribe, please visit http://openib.org/mailman/listinfo/openib-general
