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br
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2019-06-04T15:28:32.992268Z
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MFC r346896:

o Rewrite softdma_process_tx() of Altera SoftDMA engine driver
  so it does not require a bounce buffer. The only need for this was
  to align the buffer address. Implement unaligned access and we don't
  need to copy data twice.
o Remove contigmalloc-based bounce buffer from xDMA code since it is
  not suitable for arbitrary memory provided by platform, which is
  sometimes a dedicated piece of memory that is not managed by OS at all.

Sponsored by:	DARPA, AFRL

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