[dpdk-stable] [PATCH] net/mlx5: fix LRO dependency to include DV flow

[Slava Ovsiienko]

> -----Original Message-----
> From: Dekel Peled <dekelp at mellanox.com>
> Sent: Thursday, October 24, 2019 15:47
> To: Matan Azrad <matan at mellanox.com>; Slava Ovsiienko
> <viacheslavo at mellanox.com>; Shahaf Shuler <shahafs at mellanox.com>
> Cc: Ori Kam <orika at mellanox.com>; dev at dpdk.org; stable at dpdk.org
> Subject: [PATCH] net/mlx5: fix LRO dependency to include DV flow
> 
> Rx queue for LRO is created using DevX. Flows created on this queue must
> use the DV flow engine.
> 
> This patch adds check of dv_flow_en=1 when configuring LRO support on
> device spawn.
> Documentation is updated accordingly.
> 
> Fixes: 175f1c21d033 ("net/mlx5: check conditions to enable LRO")
> Cc: stable at dpdk.org
> 
> Signed-off-by: Dekel Peled <dekelp at mellanox.com>
Acked-by: Viacheslav Ovsiienko <viacheslavo at mellanox.com>

> ---
>  doc/guides/nics/mlx5.rst | 2 +-
>  drivers/net/mlx5/mlx5.c  | 3 ++-
>  2 files changed, 3 insertions(+), 2 deletions(-)
> 
> diff --git a/doc/guides/nics/mlx5.rst b/doc/guides/nics/mlx5.rst index
> 600cea7..45fa968 100644
> --- a/doc/guides/nics/mlx5.rst
> +++ b/doc/guides/nics/mlx5.rst
> @@ -203,7 +203,7 @@ Limitations
> 
>  - LRO:
> 
> -  - Requires DevX to be enabled.
> +  - Requires DevX and DV flow to be enabled.
>    - KEEP_CRC offload cannot be supported with LRO.
>    - The first mbuf length, without head-room,  must be big enough to include
> the
>      TCP header (122B).
> diff --git a/drivers/net/mlx5/mlx5.c b/drivers/net/mlx5/mlx5.c index
> b99c5a9..5977d06 100644
> --- a/drivers/net/mlx5/mlx5.c
> +++ b/drivers/net/mlx5/mlx5.c
> @@ -2033,7 +2033,8 @@ struct mlx5_dev_spawn_data {
>  		if (priv->counter_fallback)
>  			DRV_LOG(INFO, "Use fall-back DV counter
> management\n");
>  		/* Check for LRO support. */
> -		if (config.dest_tir && config.hca_attr.lro_cap) {
> +		if (config.dest_tir && config.hca_attr.lro_cap &&
> +		    config.dv_flow_en) {
>  			/* TBD check tunnel lro caps. */
>  			config.lro.supported = config.hca_attr.lro_cap;
>  			DRV_LOG(DEBUG, "Device supports LRO");
> --
> 1.8.3.1