linux-kernel - Re: [PATCH net-next 10/19] net: hns: bugfix about pfc pause frame statistics

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Date:	Tue, 21 Jun 2016 13:32:58 +0300
From:	Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:	Yisen Zhuang <Yisen.Zhuang@...wei.com>, davem@...emloft.net,
	salil.mehta@...wei.com, yankejian@...wei.com
Cc:	liguozhu@...wei.com, huangdaode@...ilicon.com, arnd@...db.de,
	andrew@...n.ch, geliangtang@....com, ivecera@...hat.com,
	fengguang.wu@...el.com, charles.chenxin@...wei.com,
	netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, linuxarm@...wei.com
Subject: Re: [PATCH net-next 10/19] net: hns: bugfix about pfc pause frame
 statistics

On Tue, 2016-06-21 at 11:56 +0800, Yisen Zhuang wrote:
> From: Daode Huang <huangdaode@...ilicon.com>
> 
> For SoC hip06, PFC pause handled in dsaf, while hip05 in XGMAC,
> so change the statistics of pfc pause in dsaf and remove the old
> pfc pause frame statistics.
> 


> +static char *hns_dsaf_get_node_stats_strings(char *data, int node,
> +					     struct dsaf_device
> *dsaf_dev)
>  {
>  	char *buff = data;
> +	int i;
> +	bool is_ver1 = AE_IS_VER1(dsaf_dev->dsaf_ver);
>  
>  	snprintf(buff, ETH_GSTRING_LEN, "innod%d_pad_drop_pkts",
> node);
>  	buff = buff + ETH_GSTRING_LEN;
> @@ -2502,6 +2530,18 @@ static char
> *hns_dsaf_get_node_stats_strings(char *data, int node)
>  	buff = buff + ETH_GSTRING_LEN;
>  	snprintf(buff, ETH_GSTRING_LEN, "innod%d_stp_drop_pkts",
> node);
>  	buff = buff + ETH_GSTRING_LEN;
> +	if ((node < DSAF_SERVICE_NW_NUM) && (!is_ver1)) {

Redundant parens.

> +		for (i = 0; i < DSAF_PRIO_NR; i++) {
> +			snprintf(buff, ETH_GSTRING_LEN,
> +				 "inod%d_pfc_prio%d_pkts", node, i);
> +			buff = buff + ETH_GSTRING_LEN;

buff += ...

> +		}
> +		for (i = 0; i < DSAF_PRIO_NR; i++) {
> +			snprintf(buff, ETH_GSTRING_LEN,
> +				 "onod%d_pfc_prio%d_pkts", node, i);
> +			buff = buff + ETH_GSTRING_LEN;

Ditto.

>  {
>  	u64 *p = data;
> +	int i;
>  	struct dsaf_hw_stats *hw_stats = &ddev->hw_stats[node_num];
> +	bool is_ver1 = AE_IS_VER1(ddev->dsaf_ver);
>  
>  	p[0] = hw_stats->pad_drop;
>  	p[1] = hw_stats->man_pkts;
> @@ -2527,8 +2569,16 @@ static u64 *hns_dsaf_get_node_stats(struct
> dsaf_device *ddev, u64 *data,
>  	p[10] = hw_stats->local_addr_false;
>  	p[11] = hw_stats->vlan_drop;
>  	p[12] = hw_stats->stp_drop;
> -	p[13] = hw_stats->tx_pkts;
> +	if ((node_num < DSAF_SERVICE_NW_NUM) && (!is_ver1)) {
> +		for (i = 0; i < DSAF_PRIO_NR; i++) {
> +			p[13 + i] = hw_stats->rx_pfc[i];
> +			p[13 + i + DSAF_PRIO_NR] = hw_stats-
> >tx_pfc[i];
> +		}

Two different approaches how to assign data. Above uses 2 for-loops,
here you put everything to one.

> +		p[29] = hw_stats->tx_pkts;
> +		return &p[30];
> +	}
>  
> +	p[13] = hw_stats->tx_pkts;
>  	return &p[14];
>  }

-- 

Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Intel Finland Oy