iommu/vt-d: change intel-iommu to use IOVA frame numbers

Make intel-iommu map/unmap/invalidate work with IOVA pfns instead of
pointers to "struct iova". This avoids using the iova struct from the IOVA
red-black tree and the resulting explicit find_iova() on unmap.

This patch will allow us to cache IOVAs in the next patch, in order to
avoid rbtree operations for the majority of map/unmap operations.

Note: In eliminating the find_iova() operation, we have also eliminated
the sanity check previously done in the unmap flow. Arguably, this was
overhead that is better avoided in production code, but it could be
brought back as a debug option for driver development.

Signed-off-by: Omer Peleg <[email protected]>
[[email protected]: rebased, fixed to not break iova api, and reworded
 the commit message]
Signed-off-by: Adam Morrison <[email protected]>
Reviewed-by: Shaohua Li <[email protected]>
Reviewed-by: Ben Serebrin <[email protected]>
Signed-off-by: David Woodhouse <[email protected]>

0 files changed, 0 insertions, 0 deletions