doc: add recommended versions for i40e

[dpdk.git] / doc / guides / nics / thunderx.rst

diff --git a/doc/guides/nics/thunderx.rst b/doc/guides/nics/thunderx.rst
index 5270ef2..e84eaaf 100644 (file)
--- a/doc/guides/nics/thunderx.rst
+++ b/doc/guides/nics/thunderx.rst
@@ -30,6 +30,7 @@ Features of the ThunderX PMD are:
 - SR-IOV VF
 - NUMA support
 - Multi queue set support (up to 96 queues (12 queue sets)) per port
 - SR-IOV VF
 - NUMA support
 - Multi queue set support (up to 96 queues (12 queue sets)) per port

+- Skip data bytes

 
 Supported ThunderX SoCs
 -----------------------
 
 Supported ThunderX SoCs
 -----------------------


@@ -312,6 +313,21 @@ We will choose four secondary queue sets from the ending of the list (0002:01:01
 
 The nicvf thunderx driver will make use of attached secondary VFs automatically during the interface configuration stage.
 
 
 The nicvf thunderx driver will make use of attached secondary VFs automatically during the interface configuration stage.
 

+
+Module params
+--------------
+
+skip_data_bytes
+~~~~~~~~~~~~~~~
+This feature is used to create a hole between HEADROOM and actual data. Size of hole is specified
+in bytes as module param("skip_data_bytes") to pmd.
+This scheme is useful when application would like to insert vlan header without disturbing HEADROOM.
+
+Example:
+   .. code-block:: console
+
+      -w 0002:01:00.2,skip_data_bytes=8
+

 Limitations
 -----------
 
 Limitations
 -----------
 


@@ -319,8 +335,7 @@ CRC striping
 ~~~~~~~~~~~~
 
 The ThunderX SoC family NICs strip the CRC for every packets coming into the
 ~~~~~~~~~~~~
 
 The ThunderX SoC family NICs strip the CRC for every packets coming into the

-host interface. So, CRC will be stripped even when the
-``rxmode.hw_strip_crc`` member is set to 0 in ``struct rte_eth_conf``.
+host interface irrespective of the offload configuration.

 
 Maximum packet length
 ~~~~~~~~~~~~~~~~~~~~~
 
 Maximum packet length
 ~~~~~~~~~~~~~~~~~~~~~


@@ -336,3 +351,8 @@ Maximum packet segments
 The ThunderX SoC family NICs support up to 12 segments per packet when working
 in scatter/gather mode. So, setting MTU will result with ``EINVAL`` when the
 frame size does not fit in the maximum number of segments.
 The ThunderX SoC family NICs support up to 12 segments per packet when working
 in scatter/gather mode. So, setting MTU will result with ``EINVAL`` when the
 frame size does not fit in the maximum number of segments.

+
+skip_data_bytes
+~~~~~~~~~~~~~~~
+
+Maximum limit of skip_data_bytes is 128 bytes and number of bytes should be multiple of 8.