[PATCH v2 3/3] doc: update TxPP documentation

[Soumyadeep Hore]

TxPP feature works only when DPDK library is compiled with
PTP feature enabled and application is run on PF.

Fixes: 0b6ff09a1f19 ("net/intel: support Tx packet pacing for E830")
Cc: stable at dpdk.org

Signed-off-by: Soumyadeep Hore <soumyadeep.hore at intel.com>
---
 doc/guides/nics/ice.rst | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/doc/guides/nics/ice.rst b/doc/guides/nics/ice.rst
index 7e9ba23102..a15304fb34 100644
--- a/doc/guides/nics/ice.rst
+++ b/doc/guides/nics/ice.rst
@@ -457,6 +457,10 @@ This feature is currently supported only in E830 adapters.
 The flag ``RTE_ETH_TX_OFFLOAD_SEND_ON_TIMESTAMP`` is used to enable the feature.
 In order to deliver timestamps internally ``set txtimes`` is used,
 where inter burst and intra burst time interval in nsecs is provided.
+
+Note that dpdk library should be compiled using PTP support enabled and testpmd
+application should run on PF.
+
 For example:
 
 .. code-block:: console
-- 
2.47.1