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From: "Li, Xiaoyun" <xiaoyun.li@intel.com>
To: Gregory Etelson <getelson@nvidia.com>, "dev@dpdk.org" <dev@dpdk.org>
Cc: Ajit Khaparde <ajit.khaparde@broadcom.com>,
	Olivier Matz <olivier.matz@6wind.com>,
	Andrew Rybchenko <andrew.rybchenko@oktetlabs.ru>,
	"Yigit, Ferruh" <ferruh.yigit@intel.com>,
	Thomas Monjalon <thomas@monjalon.net>,
	"stable@dpdk.org" <stable@dpdk.org>
Subject: Re: [dpdk-dev] [PATCH v2] app/testpmd: fix TX checksum calculation for tunnel
Date: Wed, 28 Jul 2021 05:07:54 +0000	[thread overview]
Message-ID: <DM4PR11MB55345A9663ED72CE35B6949599EA9@DM4PR11MB5534.namprd11.prod.outlook.com> (raw)
In-Reply-To: <20210727130757.30724-1-getelson@nvidia.com>

> -----Original Message-----
> From: Gregory Etelson <getelson@nvidia.com>
> Sent: Tuesday, July 27, 2021 21:08
> To: dev@dpdk.org
> Cc: getelson@nvidia.com; Ajit Khaparde <ajit.khaparde@broadcom.com>;
> Olivier Matz <olivier.matz@6wind.com>; Andrew Rybchenko
> <andrew.rybchenko@oktetlabs.ru>; Yigit, Ferruh <ferruh.yigit@intel.com>;
> Thomas Monjalon <thomas@monjalon.net>; stable@dpdk.org; Li, Xiaoyun
> <xiaoyun.li@intel.com>
> Subject: [PATCH v2] app/testpmd: fix TX checksum calculation for tunnel
> 
> TX checksum of a tunnelled packet can be calculated for outer headers only or
> for both outer and inner parts. The calculation method is determined by
> application.
> If TX checksum calculation can be offloaded, hardware ignores existing
> checksum value and replaces it with an updated result.
> If TX checksum is calculated by a software, existing value must be zeroed first.
> The testpmd checksum forwarding engine always zeroed inner checksums.
> If inner checksum calculation was offloaded, that header was left with 0
> checksum value.
> Following outer software checksum calculation produced wrong value.
> The patch zeroes inner IPv4 checksum only before software calculation.
> 
> Fixes: 51f694dd40f5 ("app/testpmd: rework checksum forward engine")
> Cc: stable@dpdk.org
> 
> Signed-off-by: Gregory Etelson <getelson@nvidia.com>
> ---
> v2:
>  remove blank line between Fixes and Cc
>  explicitly compare with 0 value in `if ()`
> ---
>  app/test-pmd/csumonly.c | 23 ++++++++++++-----------
>  1 file changed, 12 insertions(+), 11 deletions(-)
> 
Acked-by: Xiaoyun Li <xiaoyun.li@intel.com>

  parent reply	other threads:[~2021-07-28  5:08 UTC|newest]

Thread overview: 21+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-07-19  8:33 [dpdk-dev] [PATCH] " Gregory Etelson
2021-07-21  6:42 ` Ori Kam
2021-07-24 11:37 ` Thomas Monjalon
2021-07-24 12:43   ` Gregory Etelson
2021-07-27 13:07 ` [dpdk-dev] [PATCH v2] " Gregory Etelson
2021-07-28  1:31   ` Li, Xiaoyun
2021-07-28  3:45     ` Gregory Etelson
2021-07-28  4:09   ` Ajit Khaparde
2021-07-28  5:07   ` Li, Xiaoyun [this message]
2021-07-28 14:12   ` Olivier Matz
2021-07-28 16:07     ` Gregory Etelson
2021-07-29  8:25       ` Olivier Matz
2021-07-29 10:31         ` Gregory Etelson
2021-07-29 16:02           ` Olivier Matz
2021-07-29  9:39 ` [dpdk-dev] [PATCH v3] " Gregory Etelson
2021-07-29 16:05   ` Olivier Matz
2021-07-29 17:05     ` Gregory Etelson
2021-07-29 17:01 ` [dpdk-dev] [PATCH v4] " Gregory Etelson
2021-07-30  8:39   ` Olivier Matz
2021-07-30 12:04     ` Thomas Monjalon
2021-08-02 11:21       ` Jiang, YuX

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