[dpdk-dev] [PATCH v2 26/44] doc: add Marvell OCTEON TX2 event device documentation

[<pbhagavatula@marvell.com>]

From: Pavan Nikhilesh <pbhagavatula@marvell.com>

Add Marvell OCTEON TX2 event device documentation.

This patch also updates the MAINTAINERS file and
updates shared library versions in release_19_08.rst.

Cc: John McNamara <john.mcnamara@intel.com>
Cc: Thomas Monjalon <thomas@monjalon.net>

Signed-off-by: Pavan Nikhilesh <pbhagavatula@marvell.com>
---
 doc/guides/eventdevs/index.rst     |   1 +
 doc/guides/eventdevs/octeontx2.rst | 104 +++++++++++++++++++++++++++++
 doc/guides/platform/octeontx2.rst  |   3 +
 3 files changed, 108 insertions(+)
 create mode 100644 doc/guides/eventdevs/octeontx2.rst

diff --git a/doc/guides/eventdevs/index.rst b/doc/guides/eventdevs/index.rst
index f7382dc8a..570905b81 100644
--- a/doc/guides/eventdevs/index.rst
+++ b/doc/guides/eventdevs/index.rst
@@ -16,4 +16,5 @@ application trough the eventdev API.
     dsw
     sw
     octeontx
+    octeontx2
     opdl
diff --git a/doc/guides/eventdevs/octeontx2.rst b/doc/guides/eventdevs/octeontx2.rst
new file mode 100644
index 000000000..928251aa6
--- /dev/null
+++ b/doc/guides/eventdevs/octeontx2.rst
@@ -0,0 +1,104 @@
+..  SPDX-License-Identifier: BSD-3-Clause
+    Copyright(c) 2019 Marvell International Ltd.
+
+OCTEON TX2 SSO Eventdev Driver
+===============================
+
+The OCTEON TX2 SSO PMD (**librte_pmd_octeontx2_event**) provides poll mode
+eventdev driver support for the inbuilt event device found in the **Marvell OCTEON TX2**
+SoC family.
+
+More information about OCTEON TX2 SoC can be found at `Marvell Official Website
+<https://www.marvell.com/embedded-processors/infrastructure-processors/>`_.
+
+Features
+--------
+
+Features of the OCTEON TX2 SSO PMD are:
+
+- 256 Event queues
+- 26 (dual) and 52 (single) Event ports
+- HW event scheduler
+- Supports 1M flows per event queue
+- Flow based event pipelining
+- Flow pinning support in flow based event pipelining
+- Queue based event pipelining
+- Supports ATOMIC, ORDERED, PARALLEL schedule types per flow
+- Event scheduling QoS based on event queue priority
+- Open system with configurable amount of outstanding events limited only by
+  DRAM
+- HW accelerated dequeue timeout support to enable power management
+
+Prerequisites and Compilation procedure
+---------------------------------------
+
+   See :doc:`../platform/octeontx2` for setup information.
+
+Pre-Installation Configuration
+------------------------------
+
+Compile time Config Options
+~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+The following option can be modified in the ``config`` file.
+
+- ``CONFIG_RTE_LIBRTE_PMD_OCTEONTX2_EVENTDEV`` (default ``y``)
+
+  Toggle compilation of the ``librte_pmd_octeontx2_event`` driver.
+
+Runtime Config Options
+~~~~~~~~~~~~~~~~~~~~~~
+
+- ``Maximum number of in-flight events`` (default ``8192``)
+
+  In **Marvell OCTEON TX2** the max number of in-flight events are only limited
+  by DRAM size, the ``xae_cnt`` devargs parameter is introduced to provide
+  upper limit for in-flight events.
+  For example::
+
+    --dev "0002:0e:00.0,xae_cnt=16384"
+
+- ``Force legacy mode``
+
+  The ``single_ws`` devargs parameter is introduced to force legacy mode i.e
+  single workslot mode in SSO and disable the default dual workslot mode.
+  For example::
+
+    --dev "0002:0e:00.0,single_ws=1"
+
+- ``Event Group QoS support``
+
+  SSO GGRPs i.e. queue uses DRAM & SRAM buffers to hold in-flight
+  events. By default the buffers are assigned to the SSO GGRPs to
+  satisfy minimum HW requirements. SSO is free to assign the remaining
+  buffers to GGRPs based on a preconfigured threshold.
+  We can control the QoS of SSO GGRP by modifying the above mentioned
+  thresholds. GGRPs that have higher importance can be assigned higher
+  thresholds than the rest. The dictionary format is as follows
+  [Qx-XAQ-TAQ-IAQ][Qz-XAQ-TAQ-IAQ] expressed in percentages, 0 represents
+  default.
+  For example::
+
+    --dev "0002:0e:00.0,qos=[1-50-50-50]"
+
+- ``Selftest``
+
+  The functionality of OCTEON TX2 eventdev can be verified using this option,
+  various unit and functional tests are run to verify the sanity.
+  The tests are run once the vdev creation is successfully complete.
+  For example::
+
+    --dev "0002:0e:00.0,selftest=1"
+
+Debugging Options
+~~~~~~~~~~~~~~~~~
+
+.. _table_octeontx2_event_debug_options:
+
+.. table:: OCTEON TX2 event device debug options
+
+   +---+------------+-------------------------------------------------------+
+   | # | Component  | EAL log command                                       |
+   +===+============+=======================================================+
+   | 1 | SSO        | --log-level='pmd\.event\.octeontx2,8'                |
+   +---+------------+-------------------------------------------------------+
diff --git a/doc/guides/platform/octeontx2.rst b/doc/guides/platform/octeontx2.rst
index c9ea45647..fbf1193e7 100644
--- a/doc/guides/platform/octeontx2.rst
+++ b/doc/guides/platform/octeontx2.rst
@@ -101,6 +101,9 @@ This section lists dataplane H/W block(s) available in OCTEON TX2 SoC.
 #. **Mempool Driver**
    See :doc:`../mempool/octeontx2` for NPA mempool driver information.
 
+#. **Event Device Driver**
+   See :doc:`../eventdevs/octeontx2` for SSO event device driver information.
+
 Procedure to Setup Platform
 ---------------------------
 
-- 
2.22.0