linux-kernel - Re: [RFC net-next v2 4/5] net: phy: nxp-c45-tja11xx: add MACsec statistics

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Message-ID: <ZOivfv6H60faLvCi@hog>
Date:   Fri, 25 Aug 2023 15:41:18 +0200
From:   Sabrina Dubroca <sd@...asysnail.net>
To:     "Radu Pirea (NXP OSS)" <radu-nicolae.pirea@....nxp.com>
Cc:     andrew@...n.ch, hkallweit1@...il.com, linux@...linux.org.uk,
        davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org,
        pabeni@...hat.com, richardcochran@...il.com,
        sebastian.tobuschat@....com, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [RFC net-next v2 4/5] net: phy: nxp-c45-tja11xx: add MACsec
 statistics

2023-08-24, 12:16:14 +0300, Radu Pirea (NXP OSS) wrote:
> @@ -1323,8 +1469,10 @@ static int nxp_c45_mdo_del_txsa(struct macsec_context *ctx)
>  
>  	nxp_c45_select_secy(phydev, phy_secy->secy_id);
>  
> -	if (tx_sa->is_enabled)
> +	if (tx_sa->is_enabled) {
>  		nxp_c45_update_key_status(phydev, tx_sa);
> +		nxp_c45_tx_sa_stats_clear(phydev, tx_sa);

If the TXSA was already disabled (via mdo_upd_txsa), don't you need to
clear the stats as well?

[...]
> +static int nxp_c45_mdo_get_tx_sc_stats(struct macsec_context *ctx)
> +{
[...]
> +	nxp_c45_macsec_read(phydev, MACSEC_OOE1HS, &reg);
> +	stat = (u64)reg << 32;
> +	nxp_c45_macsec_read(phydev, MACSEC_OOE2HS, &reg);
> +	stat |= reg;
> +	if (ctx->secy->tx_sc.encrypt)
> +		tx_sc_stats->OutOctetsEncrypted = stat;
> +	else
> +		tx_sc_stats->OutOctetsEncrypted = 0;
> +
> +	if (ctx->secy->protect_frames)
> +		tx_sc_stats->OutOctetsProtected = stat;
> +	else
> +		tx_sc_stats->OutOctetsProtected = 0;

This doesn't look consistent with macsec_count_tx
(drivers/net/macsec.c).

-- 
Sabrina