netdev - Re: [net-next 14/14] net/mlx5e: Add kTLS TX HW offload support

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Date:   Thu, 4 Jul 2019 16:30:21 -0400
From:   Saeed Mahameed <saeedm@....mellanox.co.il>
To:     Jakub Kicinski <jakub.kicinski@...ronome.com>
Cc:     Saeed Mahameed <saeedm@...lanox.com>,
        "David S. Miller" <davem@...emloft.net>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        Tariq Toukan <tariqt@...lanox.com>,
        Eran Ben Elisha <eranbe@...lanox.com>,
        Boris Pismenny <borisp@...lanox.com>
Subject: Re: [net-next 14/14] net/mlx5e: Add kTLS TX HW offload support

On Thu, Jul 4, 2019 at 4:12 PM Jakub Kicinski
<jakub.kicinski@...ronome.com> wrote:
>
> On Thu, 4 Jul 2019 18:16:15 +0000, Saeed Mahameed wrote:
> > diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_stats.c b/drivers/net/ethernet/mellanox/mlx5/core/en_stats.c
> > index 483d321d2151..6854f132d505 100644
> > --- a/drivers/net/ethernet/mellanox/mlx5/core/en_stats.c
> > +++ b/drivers/net/ethernet/mellanox/mlx5/core/en_stats.c
> > @@ -50,6 +50,15 @@ static const struct counter_desc sw_stats_desc[] = {
> >  #ifdef CONFIG_MLX5_EN_TLS
> >       { MLX5E_DECLARE_STAT(struct mlx5e_sw_stats, tx_tls_ooo) },
> >       { MLX5E_DECLARE_STAT(struct mlx5e_sw_stats, tx_tls_resync_bytes) },
> > +
> > +     { MLX5E_DECLARE_STAT(struct mlx5e_sw_stats, tx_ktls_ooo) },
>
> Why do you call this stat tx_ktls_ooo, and not tx_tls_ooo (extra 'k')?
>
> For nfp I used the stats' names from mlx5 FPGA to make sure we are all
> consistent.  I've added them to the tls-offload.rst doc and Boris has
> reviewed it.
>
>  * ``rx_tls_decrypted`` - number of successfully decrypted TLS segments
>  * ``tx_tls_encrypted`` - number of in-order TLS segments passed to device
>    for encryption
>  * ``tx_tls_ooo`` - number of TX packets which were part of a TLS stream
>    but did not arrive in the expected order
>  * ``tx_tls_drop_no_sync_data`` - number of TX packets dropped because
>    they arrived out of order and associated record could not be found
>
> Why can't you use the same names for the stats as you used for your mlx5
> FPGA?
>

Actually i agree here, I asked tariq to have FPGA TLS and new mlx5
embedded TLS  mutually exclusive.
so there shouldn't be any reason to have new counter names for non FPGA tls.

> > +     { MLX5E_DECLARE_STAT(struct mlx5e_sw_stats, tx_ktls_ooo_drop_no_sync_data) },
> > +     { MLX5E_DECLARE_STAT(struct mlx5e_sw_stats, tx_ktls_ooo_drop_bypass_req) },
> > +     { MLX5E_DECLARE_STAT(struct mlx5e_sw_stats, tx_ktls_ooo_dump_bytes) },
> > +     { MLX5E_DECLARE_STAT(struct mlx5e_sw_stats, tx_ktls_ooo_dump_packets) },
> > +     { MLX5E_DECLARE_STAT(struct mlx5e_sw_stats, tx_ktls_enc_packets) },
> > +     { MLX5E_DECLARE_STAT(struct mlx5e_sw_stats, tx_ktls_enc_bytes) },
> > +     { MLX5E_DECLARE_STAT(struct mlx5e_sw_stats, tx_ktls_ctx) },
> >  #endif
> >
> >       { MLX5E_DECLARE_STAT(struct mlx5e_sw_stats, rx_lro_packets) },
>
> Dave, please don't apply this, I will review in depth once I get
> through the earlier 200 emails ;)

Jakub can you please expedite ?
Dave if it is ok with you i will re-spin and push a  new pull request
with  mlx5-next dependencies + 2 Devlink fw version patches,
and independently, i will post the TLS series for Jakub to review ?