linux-kernel - Re: [net-next PATCH v2] octeontx2-pf: Reset MAC stats during probe

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Message-ID: <20240307204725.4dddcc9d@kernel.org>
Date: Thu, 7 Mar 2024 20:47:25 -0800
From: Jakub Kicinski <kuba@...nel.org>
To: Sai Krishna <saikrishnag@...vell.com>
Cc: <davem@...emloft.net>, <edumazet@...gle.com>, <pabeni@...hat.com>,
 <netdev@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
 <sgoutham@...vell.com>, <gakula@...vell.com>, <hkelam@...vell.com>,
 <sbhatta@...vell.com>
Subject: Re: [net-next PATCH v2] octeontx2-pf: Reset MAC stats during probe

On Tue, 5 Mar 2024 13:57:07 +0530 Sai Krishna wrote:
> +int otx2_reset_mac_stats(struct otx2_nic *pfvf);
>  
>  /* RVU block related APIs */
>  int otx2_attach_npa_nix(struct otx2_nic *pfvf);
> diff --git a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_pf.c b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_pf.c
> index e5fe67e73865..a91f5b7e84c6 100644
> --- a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_pf.c
> +++ b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_pf.c
> @@ -1124,6 +1124,24 @@ static int otx2_cgx_config_linkevents(struct otx2_nic *pf, bool enable)
>  	return err;
>  }
>  
> +int otx2_reset_mac_stats(struct otx2_nic *pfvf)
> +{
> +	struct msg_req *req;
> +	int err;
> +
> +	mutex_lock(&pfvf->mbox.lock);
> +	req = otx2_mbox_alloc_msg_cgx_stats_rst(&pfvf->mbox);
> +	if (!req) {
> +		mutex_unlock(&pfvf->mbox.lock);
> +		return -ENOMEM;
> +	}
> +
> +	err = otx2_sync_mbox_msg(&pfvf->mbox);
> +	mutex_unlock(&pfvf->mbox.lock);
> +	return err;
> +}
> +EXPORT_SYMBOL(otx2_reset_mac_stats);

Why the export? I see only one call to this function and it's right
below..

>  static int otx2_cgx_config_loopback(struct otx2_nic *pf, bool enable)
>  {
>  	struct msg_req *msg;
> @@ -3048,6 +3066,9 @@ static int otx2_probe(struct pci_dev *pdev, const struct pci_device_id *id)
>  
>  	otx2_qos_init(pf, qos_txqs);
>  
> +	/* reset CGX/RPM MAC stats */
> +	otx2_reset_mac_stats(pf);
> +