linux-kernel - Re: [PATCH 7/7] net: dsa: b53: Expose PTP timestamping ioctls to userspace

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Message-ID: <ba543ae4-3a71-13fe-fa82-600ac37eaf5a@linutronix.de>
Date:   Fri, 5 Nov 2021 14:38:01 +0100
From:   Martin Kaistra <martin.kaistra@...utronix.de>
To:     Richard Cochran <richardcochran@...il.com>
Cc:     Florian Fainelli <f.fainelli@...il.com>,
        Andrew Lunn <andrew@...n.ch>,
        Vivien Didelot <vivien.didelot@...il.com>,
        Kurt Kanzenbach <kurt@...utronix.de>,
        Vladimir Oltean <olteanv@...il.com>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        John Stultz <john.stultz@...aro.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Stephen Boyd <sboyd@...nel.org>,
        Russell King <linux@...linux.org.uk>,
        Marc Kleine-Budde <mkl@...gutronix.de>,
        linux-kernel@...r.kernel.org, netdev@...r.kernel.org
Subject: Re: [PATCH 7/7] net: dsa: b53: Expose PTP timestamping ioctls to
 userspace

Am 04.11.21 um 18:42 schrieb Richard Cochran:
> On Thu, Nov 04, 2021 at 02:32:01PM +0100, Martin Kaistra wrote:
>> +static int b53_set_hwtstamp_config(struct b53_device *dev, int port,
>> +				   struct hwtstamp_config *config)
>> +{
>> +	struct b53_port_hwtstamp *ps = &dev->ports[port].port_hwtstamp;
>> +	bool tstamp_enable = false;
>> +
>> +	clear_bit_unlock(B53_HWTSTAMP_ENABLED, &ps->state);
>> +
>> +	/* Reserved for future extensions */
>> +	if (config->flags)
>> +		return -EINVAL;
>> +
>> +	switch (config->tx_type) {
>> +	case HWTSTAMP_TX_ON:
>> +		tstamp_enable = true;
>> +		break;
>> +	case HWTSTAMP_TX_OFF:
>> +		tstamp_enable = false;
>> +		break;
>> +	default:
>> +		return -ERANGE;
>> +	}
>> +
>> +	switch (config->rx_filter) {
>> +	case HWTSTAMP_FILTER_NONE:
>> +		tstamp_enable = false;
>> +		break;
>> +	case HWTSTAMP_FILTER_PTP_V2_L2_EVENT:
>> +	case HWTSTAMP_FILTER_PTP_V2_L2_SYNC:
>> +	case HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ:
>> +	case HWTSTAMP_FILTER_PTP_V2_EVENT:
>> +	case HWTSTAMP_FILTER_PTP_V2_SYNC:
>> +	case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ:
> 
> This is incorrect.  HWTSTAMP_FILTER_PTP_V2_EVENT includes support for
> UDP/IPv4 and UDP/IPv6.  Driver should return error here.

Ok, then I will remove HWTSTAMP_FILTER_PTP_V2_(EVENT|SYNC|DELAY_REQ) 
from this list, what about HWTSTAMP_FILTER_ALL?

> 
>> +	case HWTSTAMP_FILTER_ALL:
>> +		config->rx_filter = HWTSTAMP_FILTER_PTP_V2_L2_EVENT;
>> +		break;
>> +	default:
>> +		return -ERANGE;
>> +	}
> 
> Thanks,
> Richard
>