netdev - Re: [RFC PATCH net-next v3 2/2] macb: Enable 1588 support in SAMA5Dx platforms.

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Message-ID: <20161207194332.GB13062@netboy>
Date:   Wed, 7 Dec 2016 20:43:32 +0100
From:   Richard Cochran <richardcochran@...il.com>
To:     Andrei Pistirica <andrei.pistirica@...rochip.com>
Cc:     netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, davem@...emloft.net,
        nicolas.ferre@...el.com, harinikatakamlinux@...il.com,
        harini.katakam@...inx.com, punnaia@...inx.com, michals@...inx.com,
        anirudh@...inx.com, boris.brezillon@...e-electrons.com,
        alexandre.belloni@...e-electrons.com, tbultel@...elsurmer.com,
        rafalo@...ence.com
Subject: Re: [RFC PATCH net-next v3 2/2] macb: Enable 1588 support in SAMA5Dx
 platforms.

On Wed, Dec 07, 2016 at 08:21:52PM +0200, Andrei Pistirica wrote:
> +static int gem_hwtst_set(struct net_device *netdev,
> +			 struct ifreq *ifr, int cmd)
> +{

...

> +	switch (config.rx_filter) {
> +	case HWTSTAMP_FILTER_NONE:
> +		if (priv->hwts_rx_en)
> +			priv->hwts_rx_en = 0;
> +		break;
> +	case HWTSTAMP_FILTER_PTP_V1_L4_EVENT:
> +	case HWTSTAMP_FILTER_PTP_V2_L4_EVENT:
> +	case HWTSTAMP_FILTER_PTP_V2_L2_EVENT:
> +	case HWTSTAMP_FILTER_ALL:
> +	case HWTSTAMP_FILTER_PTP_V1_L4_SYNC:
> +	case HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ:
> +	case HWTSTAMP_FILTER_PTP_V2_L2_SYNC:
> +	case HWTSTAMP_FILTER_PTP_V2_L4_SYNC:
> +	case HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ:
> +	case HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ:
> +	case HWTSTAMP_FILTER_PTP_V2_EVENT:
> +	case HWTSTAMP_FILTER_PTP_V2_SYNC:
> +	case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ:
> +		config.rx_filter = HWTSTAMP_FILTER_ALL;

Does the device really time stamp all packets?

Or did you mean "all PTP packets?  For that, use
HWTSTAMP_FILTER_PTP_V2_EVENT.

Thanks,
Richard