doc: announce ethdev TM API back to experimental status

Based on the discussion in mail thread, it is concluded that
all traffic manager API's (rte_tm.h) need to be marked experimental
till few more releases to support further improvements to spec.

https://mails.dpdk.org/archives/dev/2020-April/164970.html

Adding deprecation notice for the same in advance.

Signed-off-by: Nithin Dabilpuram <ndabilpuram@marvell.com>
Acked-by: Ray Kinsella <mdr@ashroe.eu>
Acked-by: Cristian Dumitrescu <cristian.dumitrescu@intel.com>
Acked-by: Jerin Jacob <jerinj@marvell.com>

diff --git a/doc/guides/rel_notes/deprecation.rst b/doc/guides/rel_notes/deprecation.rst
index 6208307..2e2ed92 100644 (file)
--- a/doc/guides/rel_notes/deprecation.rst
+++ b/doc/guides/rel_notes/deprecation.rst
@@ -87,6 +87,13 @@ Deprecation Notices
   Existing ``rte_eth_rx_descriptor_status`` and ``rte_eth_tx_descriptor_status``
   APIs can be used as replacement.
 
+* traffic manager: All traffic manager API's in ``rte_tm.h`` were mistakenly made
+  ABI stable in the v19.11 release. The TM maintainer and other contributors have
+  agreed to keep the TM APIs as experimental in expectation of additional spec
+  improvements. Therefore, all APIs in ``rte_tm.h`` will be marked back as
+  experimental in v20.11 DPDK release. For more details, please see `the thread
+  <https://mails.dpdk.org/archives/dev/2020-April/164970.html>`_.
+
 * cryptodev: support for using IV with all sizes is added, J0 still can
   be used but only when IV length in following structs ``rte_crypto_auth_xform``,
   ``rte_crypto_aead_xform`` is set to zero. When IV length is greater or equal