netdev - Re: [patch net-next RFC 5/7] mlxsw: Register KVD resources with devlink

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Date:   Wed, 25 Oct 2017 10:40:03 -0600
From:   David Ahern <dsa@...ulusnetworks.com>
To:     Jiri Pirko <jiri@...nulli.us>, netdev@...r.kernel.org
Cc:     davem@...emloft.net, mlxsw@...lanox.com, andrew@...n.ch,
        vivien.didelot@...oirfairelinux.com, f.fainelli@...il.com,
        michael.chan@...adcom.com, ganeshgr@...lsio.com,
        saeedm@...lanox.com, matanb@...lanox.com, leonro@...lanox.com,
        idosch@...lanox.com, jakub.kicinski@...ronome.com, ast@...nel.org,
        daniel@...earbox.net, simon.horman@...ronome.com,
        pieter.jansenvanvuuren@...ronome.com, john.hurley@...ronome.com,
        alexander.h.duyck@...el.com, linville@...driver.com,
        gospo@...adcom.com, steven.lin1@...adcom.com, yuvalm@...lanox.com,
        ogerlitz@...lanox.com
Subject: Re: [patch net-next RFC 5/7] mlxsw: Register KVD resources with
 devlink

On 10/24/17 3:22 AM, Jiri Pirko wrote:
> diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum.c b/drivers/net/ethernet/mellanox/mlxsw/spectrum.c
> index 12b6ac4..565f94e 100644
> --- a/drivers/net/ethernet/mellanox/mlxsw/spectrum.c
> +++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum.c
> @@ -3864,7 +3864,6 @@ static void mlxsw_sp_fini(struct mlxsw_core *mlxsw_core)
>  	mlxsw_sp_fids_fini(mlxsw_sp);
>  	mlxsw_sp_kvdl_fini(mlxsw_sp);
>  }
> -
>  static const struct mlxsw_config_profile mlxsw_sp_config_profile = {
>  	.used_max_vepa_channels		= 1,
>  	.max_vepa_channels		= 0,

Why remove the spacer line?

> @@ -3897,6 +3896,95 @@ static const struct mlxsw_config_profile mlxsw_sp_config_profile = {
>  	.resource_query_enable		= 1,
>  };
>  
> +int mlxsw_sp_resource_kvd_size_validate(void *priv, u64 size)
> +{
> +	/* KVD total size cannot be set*/
> +	return -EINVAL;

-EOPNOTSUPP? There is nothing wrong with the value; it's the action that
is not supported.

> +}
> +
> +int mlxsw_sp_resource_kvd_sub_size_validate(void *priv, u64 size)
> +{
> +	const struct mlxsw_config_profile *profile;
> +
> +	profile = &mlxsw_sp_config_profile;
> +	if (size % profile->kvd_hash_granularity)
> +		return -EINVAL;

devlink needs extack capability to return messages to the user.