X-Git-Url: http://git.droids-corp.org/?a=blobdiff_plain;f=doc%2Fguides%2Feventdevs%2Focteontx2.rst;h=fad84cf42d54169bbd1da137c94cbc564ea13ee7;hb=ca52fccbb3b9c3409c39650d826ae883a60270d1;hp=c864f39f921daa8873ecf06406e3fc2f33368510;hpb=09d5c0f356d59e61099591539e4e7a68c07fa1e7;p=dpdk.git

diff --git a/doc/guides/eventdevs/octeontx2.rst b/doc/guides/eventdevs/octeontx2.rst
index c864f39f92..fad84cf42d 100644
--- a/doc/guides/eventdevs/octeontx2.rst
+++ b/doc/guides/eventdevs/octeontx2.rst
@@ -28,6 +28,16 @@ Features of the OCTEON TX2 SSO PMD are:
 - Open system with configurable amount of outstanding events limited only by
   DRAM
 - HW accelerated dequeue timeout support to enable power management
+- HW managed event timers support through TIM, with high precision and
+  time granularity of 2.5us.
+- Up to 256 TIM rings aka event timer adapters.
+- Up to 8 rings traversed in parallel.
+- HW managed packets enqueued from ethdev to eventdev exposed through event eth
+  RX adapter.
+- N:1 ethernet device Rx queue to Event queue mapping.
+- Lockfree Tx from event eth Tx adapter using ``DEV_TX_OFFLOAD_MT_LOCKFREE``
+  capability while maintaining receive packet order.
+- Full Rx/Tx offload support defined through ethdev queue config.
 
 Prerequisites and Compilation procedure
 ---------------------------------------
@@ -66,6 +76,78 @@ Runtime Config Options
 
     --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"
+
+- ``TIM disable NPA``
+
+  By default chunks are allocated from NPA then TIM can automatically free
+  them when traversing the list of chunks. The ``tim_disable_npa`` devargs
+  parameter disables NPA and uses software mempool to manage chunks
+  For example::
+
+    --dev "0002:0e:00.0,tim_disable_npa=1"
+
+- ``TIM modify chunk slots``
+
+  The ``tim_chnk_slots`` devargs can be used to modify number of chunk slots.
+  Chunks are used to store event timers, a chunk can be visualised as an array
+  where the last element points to the next chunk and rest of them are used to
+  store events. TIM traverses the list of chunks and enqueues the event timers
+  to SSO. The default value is 255 and the max value is 4095.
+  For example::
+
+    --dev "0002:0e:00.0,tim_chnk_slots=1023"
+
+- ``TIM enable arm/cancel statistics``
+
+  The ``tim_stats_ena`` devargs can be used to enable arm and cancel stats of
+  event timer adapter.
+  For example::
+
+    --dev "0002:0e:00.0,tim_stats_ena=1"
+
+- ``TIM limit max rings reserved``
+
+  The ``tim_rings_lmt`` devargs can be used to limit the max number of TIM
+  rings i.e. event timer adapter reserved on probe. Since, TIM rings are HW
+  resources we can avoid starving other applications by not grabbing all the
+  rings.
+  For example::
+
+    --dev "0002:0e:00.0,tim_rings_lmt=5"
+
+- ``TIM ring control internal parameters``
+
+  When using multiple TIM rings the ``tim_ring_ctl`` devargs can be used to
+  control each TIM rings internal parameters uniquely. The following dict
+  format is expected [ring-chnk_slots-disable_npa-stats_ena]. 0 represents
+  default values.
+  For Example::
+
+    --dev "0002:0e:00.0,tim_ring_ctl=[2-1023-1-0]"
+
 Debugging Options
 ~~~~~~~~~~~~~~~~~
 
@@ -78,3 +160,5 @@ Debugging Options
    +===+============+=======================================================+
    | 1 | SSO        | --log-level='pmd\.event\.octeontx2,8'                 |
    +---+------------+-------------------------------------------------------+
+   | 2 | TIM        | --log-level='pmd\.event\.octeontx2\.timer,8'          |
+   +---+------------+-------------------------------------------------------+