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Message-ID: <DM6PR11MB4657FFF312FA212538EDBA429B4C2@DM6PR11MB4657.namprd11.prod.outlook.com>
Date: Tue, 22 Oct 2024 13:24:27 +0000
From: "Kubalewski, Arkadiusz" <arkadiusz.kubalewski@...el.com>
To: Paul Menzel <pmenzel@...gen.mpg.de>
CC: "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
"intel-wired-lan@...ts.osuosl.org" <intel-wired-lan@...ts.osuosl.org>,
"Nguyen, Anthony L" <anthony.l.nguyen@...el.com>, "Kitszel, Przemyslaw"
<przemyslaw.kitszel@...el.com>, "davem@...emloft.net" <davem@...emloft.net>,
"edumazet@...gle.com" <edumazet@...gle.com>, "kuba@...nel.org"
<kuba@...nel.org>, "pabeni@...hat.com" <pabeni@...hat.com>,
"richardcochran@...il.com" <richardcochran@...il.com>, "Loktionov, Aleksandr"
<aleksandr.loktionov@...el.com>
Subject: RE: [Intel-wired-lan] [PATCH net-next 2/2] ice: ptp: add control over
HW timestamp latch point
>From: Paul Menzel <pmenzel@...gen.mpg.de>
>Sent: Monday, October 21, 2024 5:34 PM
>
>Dear Arkadiusz,
>
>
>Thank you for the patch.
Thank you for the review!
>
>Am 21.10.24 um 16:19 schrieb Arkadiusz Kubalewski:
>> Allow user to control the latch point of ptp HW timestamps in E825
>> devices.
>
>Please give an example how to configure it.
Sure will do.
>
>> 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
>> + */
>> +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
>> @@ -2529,6 +2573,8 @@ static void ice_ptp_set_funcs_e82x(struct ice_pf
>> *pf)
>> if (ice_is_e825c(&pf->hw)) {
>> pf->ptp.ice_pin_desc = ice_pin_desc_e825c;
>> pf->ptp.info.n_pins = ICE_PIN_DESC_ARR_LEN(ice_pin_desc_e825c);
>> + pf->ptp.info.set_ts_point = ice_set_ts_point;
>> + pf->ptp.info.get_ts_point = ice_get_ts_point;
>> } else {
>> pf->ptp.ice_pin_desc = ice_pin_desc_e82x;
>> pf->ptp.info.n_pins = ICE_PIN_DESC_ARR_LEN(ice_pin_desc_e82x);
>> diff --git a/drivers/net/ethernet/intel/ice/ice_ptp_hw.c
>> b/drivers/net/ethernet/intel/ice/ice_ptp_hw.c
>> index da88c6ccfaeb..d81525bc8a16 100644
>> --- a/drivers/net/ethernet/intel/ice/ice_ptp_hw.c
>> +++ b/drivers/net/ethernet/intel/ice/ice_ptp_hw.c
>> @@ -6303,3 +6303,60 @@ int ice_cgu_get_output_pin_state_caps(struct
>> ice_hw *hw, u8 pin_id,
>>
>> return 0;
>> }
>> +
>> +/**
>> + * ice_ptp_hw_ts_point_get - check if tx timestamping is latched on/post
>> SFD
>> + * @hw: pointer to the HW struct
>> + * @sfd_ena: on success true if tx timestamping latched at beginning of
>> SFD,
>> + * false if post sfd
>> + *
>> + * Verify if HW timestamping point is configured to measure at the
>> beginning or
>> + * post of SFD (Start of Frame Delimiter)
>> + *
>> + * Return: 0 on success, negative on error
>> + */
>> +int ice_ptp_hw_ts_point_get(struct ice_hw *hw, bool *sfd_ena)
>> +{
>> + u8 port = hw->port_info->lport;
>> + u32 val;
>> + int err;
>> +
>> + err = ice_read_mac_reg_eth56g(hw, port, PHY_MAC_XIF_MODE, &val);
>> + if (err)
>> + return err;
>> + if (val | PHY_MAC_XIF_TS_SFD_ENA_M)
>> + *sfd_ena = true;
>> + else
>> + *sfd_ena = false;
>
>Use ternary operator?
>
Ok, will do.
>> +
>> + return err;
>
>As the function returns `int`, use integers (macros) instead of boolean?
>
Sure, will fix in next version.
>> +}
>> +
>> +/**
>> + * ice_ptp_hw_ts_point_set - configure timestamping on/post SFD
>> + * @hw: pointer to the HW struct
>> + * @sfd_ena: true to enable timestamping at beginning of SFD, false post
>> sfd
>> + *
>> + * Configure timestamping to measure at the beginning/post SFD (Start of
>> Frame
>> + * Delimiter)
>> + *
>> + * Return: 0 on success, negative on error
>> + */
>> +int ice_ptp_hw_ts_point_set(struct ice_hw *hw, bool sfd_ena)
>> +{
>> + u8 port = hw->port_info->lport;
>> + int err, val;
>> +
>> + err = ice_read_mac_reg_eth56g(hw, port, PHY_MAC_XIF_MODE, &val);
>> + if (err)
>> + return err;
>> + if ((val | PHY_MAC_XIF_TS_SFD_ENA_M && sfd_ena) ||
>> + (!(val | PHY_MAC_XIF_TS_SFD_ENA_M) && !sfd_ena))
>> + return -EINVAL;
>> + if (sfd_ena)
>> + val |= PHY_MAC_XIF_TS_SFD_ENA_M;
>> + else
>> + val &= ~PHY_MAC_XIF_TS_SFD_ENA_M;
>> +
>> + return ice_write_mac_reg_eth56g(hw, port, PHY_MAC_XIF_MODE, val);
>> +}
>> diff --git a/drivers/net/ethernet/intel/ice/ice_ptp_hw.h
>> b/drivers/net/ethernet/intel/ice/ice_ptp_hw.h
>> index 656daff3447e..cefedd01479a 100644
>> --- a/drivers/net/ethernet/intel/ice/ice_ptp_hw.h
>> +++ b/drivers/net/ethernet/intel/ice/ice_ptp_hw.h
>> @@ -348,6 +348,8 @@ void ice_ptp_init_hw(struct ice_hw *hw);
>> int ice_get_phy_tx_tstamp_ready(struct ice_hw *hw, u8 block, u64
>> *tstamp_ready);
>> int ice_ptp_one_port_cmd(struct ice_hw *hw, u8 configured_port,
>> enum ice_ptp_tmr_cmd configured_cmd);
>> +int ice_ptp_hw_ts_point_get(struct ice_hw *hw, bool *sfd_ena);
>> +int ice_ptp_hw_ts_point_set(struct ice_hw *hw, bool sfd_ena);
>>
>> /* E822 family functions */
>> int ice_read_quad_reg_e82x(struct ice_hw *hw, u8 quad, u16 offset, u32
>> *val);
>
>
>Kind regards,
>
>Paul
Thank you!
Arkadiusz
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