This patch updates the programmer guide and testpmd user guide for
UDP/IPv4 GSO.
Signed-off-by: Jiayu Hu <jiayu...@intel.com>
---
doc/guides/prog_guide/generic_segmentation_offload_lib.rst | 6 ++++++
doc/guides/testpmd_app_ug/testpmd_funcs.rst | 6 ++++++
2 files changed, 12 insertions(+)
diff --git a/doc/guides/prog_guide/generic_segmentation_offload_lib.rst
b/doc/guides/prog_guide/generic_segmentation_offload_lib.rst
index 9959f0d..cf700c5 100644
--- a/doc/guides/prog_guide/generic_segmentation_offload_lib.rst
+++ b/doc/guides/prog_guide/generic_segmentation_offload_lib.rst
@@ -43,6 +43,7 @@ Limitations
#. Currently, the GSO library supports the following IPv4 packet types:
- TCP
+ - UDP
- VxLAN
- GRE
@@ -146,6 +147,11 @@ TCP/IPv4 GSO
TCP/IPv4 GSO supports segmentation of suitably large TCP/IPv4 packets, which
may also contain an optional VLAN tag.
+UDP/IPv4 GSO
+~~~~~~~~~~~~
+UDP/IPv4 GSO supports segmentation of suitably large UDP/IPv4 packets, which
+may also contain an optional VLAN tag.
+
VxLAN GSO
~~~~~~~~~
VxLAN packets GSO supports segmentation of suitably large VxLAN packets,
diff --git a/doc/guides/testpmd_app_ug/testpmd_funcs.rst
b/doc/guides/testpmd_app_ug/testpmd_funcs.rst
index 0d6fd50..1a9dcd8 100644
--- a/doc/guides/testpmd_app_ug/testpmd_funcs.rst
+++ b/doc/guides/testpmd_app_ug/testpmd_funcs.rst
@@ -1059,6 +1059,12 @@ By default, GSO is disabled for all ports.
testpmd> csum set tcp hw <port_id>
+ UDP GSO is the same as IP fragmentation, which treats the UDP header
+ as the payload and does not modify it during segmentation. That is,
+ after UDP GSO, only the first output fragment has the original UDP
+ header. Therefore, users just need to enable HW IPv4 checksum
+ calculation for GSO-enabled ports, when input packets are UDP/IPv4.
+
set gso segsz
~~~~~~~~~~~~~
--
2.7.4
