linux-kernel - Re: [PATCH net-next 2/2] ice: ptp: add control over HW timestamp latch point

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20241022134020.GU402847@kernel.org>
Date: Tue, 22 Oct 2024 14:40:20 +0100
From: Simon Horman <horms@...nel.org>
To: Arkadiusz Kubalewski <arkadiusz.kubalewski@...el.com>
Cc: netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
	intel-wired-lan@...ts.osuosl.org, anthony.l.nguyen@...el.com,
	przemyslaw.kitszel@...el.com, davem@...emloft.net,
	edumazet@...gle.com, kuba@...nel.org, pabeni@...hat.com,
	richardcochran@...il.com,
	Aleksandr Loktionov <aleksandr.loktionov@...el.com>
Subject: Re: [PATCH net-next 2/2] ice: ptp: add control over HW timestamp
 latch point

On Mon, Oct 21, 2024 at 04:19:55PM +0200, Arkadiusz Kubalewski wrote:
> Allow user to control the latch point of ptp HW timestamps in E825
> devices.
> 
> Reviewed-by: Aleksandr Loktionov <aleksandr.loktionov@...el.com>
> Signed-off-by: Arkadiusz Kubalewski <arkadiusz.kubalewski@...el.com>
> ---
>  drivers/net/ethernet/intel/ice/ice_ptp.c    | 46 +++++++++++++++++
>  drivers/net/ethernet/intel/ice/ice_ptp_hw.c | 57 +++++++++++++++++++++
>  drivers/net/ethernet/intel/ice/ice_ptp_hw.h |  2 +
>  3 files changed, 105 insertions(+)
> 
> diff --git a/drivers/net/ethernet/intel/ice/ice_ptp.c b/drivers/net/ethernet/intel/ice/ice_ptp.c
> index a999fface272..47444412ed9a 100644
> --- a/drivers/net/ethernet/intel/ice/ice_ptp.c
> +++ b/drivers/net/ethernet/intel/ice/ice_ptp.c
> @@ -2509,6 +2509,50 @@ static int ice_ptp_parse_sdp_entries(struct ice_pf *pf, __le16 *entries,
>  	return 0;
>  }
>  
> +/**
> + * ice_get_ts_point - get the tx timestamp latch point
> + * @info: the driver's PTP info structure
> + * @point: return the configured tx timestamp latch point
> + *
> + * Return: 0 on success, negative on failure.
> + */
> +static int
> +ice_get_ts_point(struct ptp_clock_info *info, enum ptp_ts_point *point)
> +{
> +	struct ice_pf *pf = ptp_info_to_pf(info);
> +	struct ice_hw *hw = &pf->hw;
> +	bool sfd_ena;
> +	int ret;
> +
> +	ice_ptp_lock(hw);
> +	ret = ice_ptp_hw_ts_point_get(hw, &sfd_ena);
> +	ice_ptp_unlock(hw);
> +	if (!ret)
> +		*point = sfd_ena ? PTP_TS_POINT_SFD : PTP_TS_POINT_POST_SFD;
> +
> +	return ret;
> +}
> +
> +/**
> + * ice_set_ts_point - set the tx timestamp latch point
> + * @info: the driver's PTP info structure
> + * @point: requested tx timestamp latch point

nit: Please include documentation of the return value,
     as was done for ice_get_ts_point.

     Flagged by ./scripts/kernel-doc -none -Warn

> + */
> +static int
> +ice_set_ts_point(struct ptp_clock_info *info, enum ptp_ts_point point)
> +{
> +	bool sfd_ena = point == PTP_TS_POINT_SFD ? true : false;
> +	struct ice_pf *pf = ptp_info_to_pf(info);
> +	struct ice_hw *hw = &pf->hw;
> +	int ret;
> +
> +	ice_ptp_lock(hw);
> +	ret = ice_ptp_hw_ts_point_set(hw, sfd_ena);
> +	ice_ptp_unlock(hw);
> +
> +	return ret;
> +}
> +
>  /**
>   * ice_ptp_set_funcs_e82x - Set specialized functions for E82X support
>   * @pf: Board private structure

...