[dpdk-dev] [PATCH] net/mlx5: txq_inline_min not set for ConnectX-5 adapters

Slava Ovsiienko viacheslavo at mellanox.com
Thu Aug 1 06:32:09 CEST 2019


Hi, David

Yes, thank you for the patch, acked.

The "txq_inline_min" value was not set for ConnectX-5 to 0 as default.
At the TX queue setup time the "txq_inline_min" is checked against MLX5_ARG_UNSET 
and default value 0 is set:

txq_set_params()
...
inlen_mode = (config->txq_inline_min == MLX5_ARG_UNSET) ?
                     0 : (unsigned int)config->txq_inline_min;

So, there should be no negative backwards. Did you observe any?

WBR, Slava

> -----Original Message-----
> From: David Christensen <drc at linux.vnet.ibm.com>
> Sent: Thursday, August 1, 2019 1:41
> To: Slava Ovsiienko <viacheslavo at mellanox.com>
> Cc: dev at dpdk.org; David Christensen <drc at linux.vnet.ibm.com>
> Subject: [PATCH] net/mlx5: txq_inline_min not set for ConnectX-5 adapters
> 
> The function mlx5_set_min_inline() includes a switch() that checks various
> PCI device IDs in order to set the txq_inline_min value.  No value is set when
> the PCI device ID matches the ConnectX-5 adapters, resulting in an assert()
> failure later in the function mlx5_set_txlimit_params().
> 
> This error was encountered on an IBM Power 9 system running RHEL 7.6 w/o
> Mellanox OFED installed.
> 
> Fixes: 38b4b397a57d ("net/mlx5: add Tx configuration and setup")
> Cc: viacheslavo at mellanox.com
> 
> Signed-off-by: David Christensen <drc at linux.vnet.ibm.com>

Acked-by: Viacheslav Ovsiienko <viacheslavo at mellanox.com>


> ---
>  drivers/net/mlx5/mlx5.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/net/mlx5/mlx5.c b/drivers/net/mlx5/mlx5.c index
> 3a345c7..0f61dd5 100644
> --- a/drivers/net/mlx5/mlx5.c
> +++ b/drivers/net/mlx5/mlx5.c
> @@ -1341,6 +1341,7 @@ struct mlx5_dev_spawn_data {
>  		 * and PFC control may be broken, so disable feature.
>  		 */
>  		config->hw_vlan_insert = 0;
> +		config->txq_inline_min = MLX5_INLINE_HSIZE_NONE;
>  		break;
>  	default:
>  		config->txq_inline_min = MLX5_INLINE_HSIZE_NONE;
> --
> 1.8.3.1



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