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net/mlx5: fix packet size inline settings

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This patch fixes the default settings for packet size to inline
with Enhanced Multi-Packet Write feature, allowing 256B packets
to be inlined with Out-Of-the-Box settings.

Fixes: 50724e1bba ("net/mlx5: update Tx definitions")

Signed-off-by: Viacheslav Ovsiienko <viacheslavo@mellanox.com>
Acked-by: Matan Azrad <matan@mellanox.com>
This commit is contained in:
Viacheslav Ovsiienko 2019-08-05 13:03:53 +00:00 committed by Raslan Darawsheh
parent c6f0485646
commit 3502b05925
2 changed files with 3 additions and 4 deletions
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2
doc/guides/nics/mlx5.rst
View File

@ -449,7 +449,7 @@ Run-time configuration
and CPU resources are scarce), data inline is not performed by the driver.
Assigning ``txqs_min_inline`` with zero always enables the data inline.
The default ``txq_inline_mpw`` value is 188. The specified value may be adjusted
The default ``txq_inline_mpw`` value is 268. The specified value may be adjusted
by the driver in order not to exceed the limit (930 bytes) and to provide better
WQE space filling without gaps, the adjustment is reflected in the debug log.
Due to multiple packets may be included to the same WQE with Enhanced Multi

5
drivers/net/mlx5/mlx5_prm.h
View File

@ -72,9 +72,8 @@
* boundary with accounting the title Control and Ethernet
* segments.
*/
#define MLX5_EMPW_DEF_INLINE_LEN (3u * MLX5_WQE_SIZE + \
MLX5_DSEG_MIN_INLINE_SIZE - \
MLX5_WQE_DSEG_SIZE)
#define MLX5_EMPW_DEF_INLINE_LEN (4u * MLX5_WQE_SIZE + \
MLX5_DSEG_MIN_INLINE_SIZE)
/*
* Maximal inline data length sent with enhanced MPW.
* Is based on maximal WQE size.