[dpdk-dev] [PATCH] doc: update release notes for I/O device memory access API
jerin.jacob at caviumnetworks.com
Thu Jan 19 06:43:21 CET 2017
Signed-off-by: Jerin Jacob <jerin.jacob at caviumnetworks.com>
doc/guides/rel_notes/release_17_02.rst | 13 +++++++++++++
1 file changed, 13 insertions(+)
diff --git a/doc/guides/rel_notes/release_17_02.rst b/doc/guides/rel_notes/release_17_02.rst
index 0ecd720..eb0e3c0 100644
@@ -193,6 +193,19 @@ New Features
See the :ref:`Elastic Flow Distributor Library <Efd_Library>` documentation in
the Programmers Guide document, for more information.
+* **Added generic EAL API for I/O device memory read/write operations.**
+ This API introduces 8-bit, 16-bit, 32bit, 64bit I/O device
+ memory read/write operations along with the relaxed versions.
+ The weakly-ordered machine like ARM needs additional I/O barrier for
+ device memory read/write access over PCI bus.
+ By introducing the EAL abstraction for I/O device memory read/write access,
+ The drivers can access I/O device memory in architecture-agnostic manner.
+ The relaxed version does not have additional I/O memory barrier, useful in
+ accessing the device registers of integrated controllers which
+ implicitly strongly ordered with respect to memory access.
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