netdev - Re: [PATCH net-next] testptp: add option to enable external timestamping edges

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Message-ID: <96e8d73f-644d-4c16-a67b-8cb81b60819d@linux.dev>
Date: Thu, 19 Jun 2025 15:17:51 +0100
From: Vadim Fedorenko <vadim.fedorenko@...ux.dev>
To: Miroslav Lichvar <mlichvar@...hat.com>, netdev@...r.kernel.org
Cc: Richard Cochran <richardcochran@...il.com>,
 Jacob Keller <jacob.e.keller@...el.com>
Subject: Re: [PATCH net-next] testptp: add option to enable external
 timestamping edges

On 19/06/2025 14:53, Miroslav Lichvar wrote:
> Some drivers (e.g. ice) don't enable any edges by default when external
> timestamping is requested by the PTP_EXTTS_REQUEST ioctl, which makes
> testptp -e unusable for testing hardware supported by these drivers.
> 
> Add -E option to specify if the rising, falling, or both edges should
> be enabled by the ioctl.
> 
> Signed-off-by: Miroslav Lichvar <mlichvar@...hat.com>
> Cc: Richard Cochran <richardcochran@...il.com>
> Cc: Jacob Keller <jacob.e.keller@...el.com>
> ---
>   tools/testing/selftests/ptp/testptp.c | 11 +++++++++--
>   1 file changed, 9 insertions(+), 2 deletions(-)
> 
> diff --git a/tools/testing/selftests/ptp/testptp.c b/tools/testing/selftests/ptp/testptp.c
> index edc08a4433fd..ed1e2886ba3c 100644
> --- a/tools/testing/selftests/ptp/testptp.c
> +++ b/tools/testing/selftests/ptp/testptp.c
> @@ -120,6 +120,7 @@ static void usage(char *progname)
>   		" -c         query the ptp clock's capabilities\n"
>   		" -d name    device to open\n"
>   		" -e val     read 'val' external time stamp events\n"
> +		" -E val     enable rising (1), falling (2), or both (3) edges\n"
>   		" -f val     adjust the ptp clock frequency by 'val' ppb\n"
>   		" -F chan    Enable single channel mask and keep device open for debugfs verification.\n"
>   		" -g         get the ptp clock time\n"
> @@ -178,6 +179,7 @@ int main(int argc, char *argv[])
>   	int adjphase = 0;
>   	int capabilities = 0;
>   	int extts = 0;
> +	int edge = 0;
>   	int flagtest = 0;
>   	int gettime = 0;
>   	int index = 0;
> @@ -202,7 +204,7 @@ int main(int argc, char *argv[])
>   
>   	progname = strrchr(argv[0], '/');
>   	progname = progname ? 1+progname : argv[0];
> -	while (EOF != (c = getopt(argc, argv, "cd:e:f:F:ghH:i:k:lL:n:o:p:P:rsSt:T:w:x:Xy:z"))) {
> +	while (EOF != (c = getopt(argc, argv, "cd:e:E:f:F:ghH:i:k:lL:n:o:p:P:rsSt:T:w:x:Xy:z"))) {
>   		switch (c) {
>   		case 'c':
>   			capabilities = 1;
> @@ -213,6 +215,11 @@ int main(int argc, char *argv[])
>   		case 'e':
>   			extts = atoi(optarg);
>   			break;
> +		case 'E':
> +			edge = atoi(optarg);
> +			edge = (edge & 1 ? PTP_RISING_EDGE : 0) |
> +				(edge & 2 ? PTP_FALLING_EDGE : 0);
> +			break;
>   		case 'f':
>   			adjfreq = atoi(optarg);
>   			break;
> @@ -444,7 +451,7 @@ int main(int argc, char *argv[])
>   		if (!readonly) {
>   			memset(&extts_request, 0, sizeof(extts_request));
>   			extts_request.index = index;
> -			extts_request.flags = PTP_ENABLE_FEATURE;
> +			extts_request.flags = PTP_ENABLE_FEATURE | edge;
>   			if (ioctl(fd, PTP_EXTTS_REQUEST, &extts_request)) {
>   				perror("PTP_EXTTS_REQUEST");
>   				extts = 0;

Reviewed-by: Vadim Fedorenko <vadim.fedorenko@...ux.dev>