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Nicolas Denoyelle authored Mar 12, 2019 and Swann Perarnau committed Mar 13, 2019

- create one directory per building block in src and include
- keep one directory for tests, \
  otherwise automake make them "test suites"
- move to AC_OPENMP, which is from autoconf 2.62 (2008)

Fix a few typos in the dma_linux_seq code, that for some reason didn't
raise any flags so far. Also add a small validation to the unit test.

This patch adds the basics for a dma interface, including
type-dependent requests structures, and an API based on explicit
copy/move calls.

The APIs is flexible enough to deal with sync/async calls. The internal
design is inspired by aml_area, with the goal that create/init stay type
specific, but the core interactions are generic.