net/mlx5: zero LRO mbuf headroom

[dpdk.git] / doc / guides / nics / mlx5.rst

diff --git a/doc/guides/nics/mlx5.rst b/doc/guides/nics/mlx5.rst
index 7e87344..92f1b97 100644 (file)
--- a/doc/guides/nics/mlx5.rst
+++ b/doc/guides/nics/mlx5.rst
@@ -82,6 +82,7 @@ Features
   increment/decrement, count, drop, mark. For details please see :ref:`Supported hardware offloads using rte_flow API`.
 - Flow insertion rate of more then million flows per second, when using Direct Rules.
 - Support for multiple rte_flow groups.
+- Hardware LRO.
 
 Limitations
 -----------
@@ -162,6 +163,11 @@ Limitations
 
 - ICMP/ICMP6 code/type matching cannot be supported togeter with IP-in-IP tunnel.
 
+- LRO:
+
+  - No mbuf headroom space is created for RX packets when LRO is configured.
+  - ``scatter_fcs`` is disabled when LRO is configured.
+
 Statistics
 ----------
 
@@ -556,6 +562,14 @@ Run-time configuration
 
   set to 128 by default.
 
+- ``lro_timeout_usec`` parameter [int]
+
+  The maximum allowed duration of an LRO session, in micro-seconds.
+  PMD will set the nearest value supported by HW, which is not bigger than
+  the input ``lro_timeout_usec`` value.
+  If this parameter is not specified, by default PMD will set
+  the smallest value supported by HW.
+
 Firmware configuration
 ~~~~~~~~~~~~~~~~~~~~~~