doc: update mlx5 flow MARK action description
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Commit Message
There some limitations added for the MARK action value range.
Fixes: 2d241515ebaf ("net/mlx5: add devarg for extensive metadata support")
Cc: stable@dpdk.org
Signed-off-by: Viacheslav Ovsiienko <viacheslavo@nvidia.com>
---
doc/guides/nics/mlx5.rst | 11 ++++++++++-
1 file changed, 10 insertions(+), 1 deletion(-)
Comments
Hi,
> -----Original Message-----
> From: Viacheslav Ovsiienko <viacheslavo@nvidia.com>
> Sent: Friday, December 11, 2020 2:06 PM
> To: dev@dpdk.org
> Cc: Raslan Darawsheh <rasland@nvidia.com>; Matan Azrad
> <matan@nvidia.com>; stable@dpdk.org
> Subject: [PATCH] doc: update mlx5 flow MARK action description
>
> There some limitations added for the MARK action value range.
>
> Fixes: 2d241515ebaf ("net/mlx5: add devarg for extensive metadata
> support")
> Cc: stable@dpdk.org
>
> Signed-off-by: Viacheslav Ovsiienko <viacheslavo@nvidia.com>
> ---
Patch applied to next-net-mlx,
Kindest regards,
Raslan Darawsheh
@@ -825,7 +825,7 @@ Driver options
+------+-----------+-----------+-------------+-------------+
| 1 | 24 bits | vary 0-32 | 32 bits | yes |
+------+-----------+-----------+-------------+-------------+
- | 2 | vary 0-32 | 32 bits | 32 bits | yes |
+ | 2 | vary 0-24 | 32 bits | 32 bits | yes |
+------+-----------+-----------+-------------+-------------+
If there is no E-Switch configuration the ``dv_xmeta_en`` parameter is
@@ -837,6 +837,15 @@ Driver options
of the extensive metadata features. The legacy Verbs supports FLAG and
MARK metadata actions over NIC Rx steering domain only.
+ The setting MARK or META value to zero means there is no item provided and
+ receiving datapath will not report in mbufs these items are present.
+
+ For the MARK action the last 16 values in the full range are reserved for
+ internal PMD purposes (to emulate FLAG action). The valid range for the
+ MARK action values is 0-0xFFEF for the 16-bit mode and 0-xFFFFEF
+ for the 24-bit mode, the flows with the MARK action value outside
+ the specified range will be rejected.
+
- ``dv_flow_en`` parameter [int]
A nonzero value enables the DV flow steering assuming it is supported