tree 018d61211dcb6bdbfb37e92d986fc79083a50f06
parent 44549e8f5eea4e0a41b487b63e616cb089922b99
author Robin Murphy <robin.murphy@arm.com> 1460374351 +0100
committer Joerg Roedel <jroedel@suse.de> 1462789069 +0200

iommu/dma: Implement scatterlist segment merging

Stop wasting IOVA space by over-aligning scatterlist segments for a
theoretical worst-case segment boundary mask, and instead take the real
limits into account to merge consecutive segments wherever appropriate,
so our callers can benefit from getting back nicely simplified lists.

This also represents the last piece of functionality wanted by users of
the current arch/arm implementation, thus brings us a small step closer
to converting that over to the common code.

Signed-off-by: Robin Murphy <robin.murphy@arm.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>