Introduce a new argument '--enable-lro' to ask testpmd to enable the LRO
feature on enabled ports, like it's done for '--enable-rx-cksum' for
instance.

Signed-off-by: Olivier Matz <olivier.matz at 6wind.com>
Acked-by: Pablo de Lara <pablo.de.lara.guarch at intel.com>
---
 app/test-pmd/parameters.c             | 4 ++++
 doc/guides/testpmd_app_ug/run_app.rst | 4 ++++
 2 files changed, 8 insertions(+)

diff --git a/app/test-pmd/parameters.c b/app/test-pmd/parameters.c
index 6a6a07e..c45f78a 100644
--- a/app/test-pmd/parameters.c
+++ b/app/test-pmd/parameters.c
@@ -149,6 +149,7 @@ usage(char* progname)
               "If the drop-queue doesn't exist, the packet is dropped. "
               "By default drop-queue=127.\n");
        printf("  --crc-strip: enable CRC stripping by hardware.\n");
+       printf("  --enable-lro: enable large receive offload.\n");
        printf("  --enable-rx-cksum: enable rx hardware checksum offload.\n");
        printf("  --disable-hw-vlan: disable hardware vlan.\n");
        printf("  --disable-hw-vlan-filter: disable hardware vlan filter.\n");
@@ -524,6 +525,7 @@ launch_args_parse(int argc, char** argv)
                { "pkt-filter-size",            1, 0, 0 },
                { "pkt-filter-drop-queue",      1, 0, 0 },
                { "crc-strip",                  0, 0, 0 },
+               { "enable-lro",                 0, 0, 0 },
                { "enable-rx-cksum",            0, 0, 0 },
                { "enable-scatter",             0, 0, 0 },
                { "disable-hw-vlan",            0, 0, 0 },
@@ -764,6 +766,8 @@ launch_args_parse(int argc, char** argv)
                        }
                        if (!strcmp(lgopts[opt_idx].name, "crc-strip"))
                                rx_mode.hw_strip_crc = 1;
+                       if (!strcmp(lgopts[opt_idx].name, "enable-lro"))
+                               rx_mode.enable_lro = 1;
                        if (!strcmp(lgopts[opt_idx].name, "enable-scatter"))
                                rx_mode.enable_scatter = 1;
                        if (!strcmp(lgopts[opt_idx].name, "enable-rx-cksum"))
diff --git a/doc/guides/testpmd_app_ug/run_app.rst 
b/doc/guides/testpmd_app_ug/run_app.rst
index 7712bd2..55c7ac0 100644
--- a/doc/guides/testpmd_app_ug/run_app.rst
+++ b/doc/guides/testpmd_app_ug/run_app.rst
@@ -285,6 +285,10 @@ The commandline options are:

     Enable hardware CRC stripping.

+*   ``--enable-lro``
+
+    Enable large receive offload.
+
 *   ``--enable-rx-cksum``

     Enable hardware RX checksum offload.
-- 
2.8.1

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