-----Original Message-----
From: Tan, Jianfeng
Sent: Monday, September 26, 2016 2:49 PM
To: dev@dpdk.org
Cc: Ananyev, Konstantin <redacted>; Wu, Jingjing <redacted>; Tan, Jianfeng
[off-list ref]; Zhe Tao [off-list ref]
Subject: [PATCH v5 3/3] app/testpmd: support tunneled TSO in csum fwd engine

Add a new command "tunnel_tso set <tso_segsz> <port>" to enable
segmentation offload and set MSS to tso_segsz. Another command,
"tunnel_tso show <port>" is added to show tunneled packet MSS.
Result 0 means tunnel_tso is disabled.

The original commands, "tso set <tso_segsz> <port>" and "tso show
<port>" are only reponsible for non-tunneled packets. And the new
commands are for tunneled packets.

Below conditions are needed to make it work:
  a. tunnel TSO is supported by the NIC;
  b. "csum parse_tunnel" must be set so that tunneled pkts are
     recognized;
  c. for tunneled pkts with outer L3 is IPv4, "csum set outer-ip"
     must be set to hw, because after tso, total_len of outer IP
     header is changed, and the checksum of outer IP header calculated
     by sw should be wrong; that is not necessary for IPv6 tunneled
     pkts because there's no checksum field to be filled anymore.

Suggested-by: Konstantin Ananyev <redacted>
Signed-off-by: Zhe Tao <redacted>
Signed-off-by: Jianfeng Tan <redacted>
---
v5:
 -- Instead of reuse original tso command, add a new command for
    tunneled tso;
 -- Fix a implicit conversion from long -> int bug, as the parameter
    of process_outer_cksums() in previous version.
 app/test-pmd/cmdline.c  | 132 +++++++++++++++++++++++++++++++++++++++++++++---
 app/test-pmd/csumonly.c |  69 ++++++++++++++++++-------
 app/test-pmd/testpmd.h  |   3 +-
 3 files changed, 179 insertions(+), 25 deletions(-)

Acked-by: Konstantin Ananyev <redacted>