jimharris f54beeaff1 nvme: create separate DMA tag for non-payload DMA buffers
Submission and completion queue memory need to use a
separate DMA tag for mappings than payload buffers,
to ensure mappings remain contiguous even with DMAR
enabled.

Submitted by:	kib
MFC after:	1 week
Sponsored by:	Intel
2015-04-08 21:49:45 +00:00
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