From patchwork Wed Nov 6 01:07:56 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Arkadiusz Kubalewski X-Patchwork-Id: 13863810 X-Patchwork-Delegate: kuba@kernel.org Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.16]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 2741F188737; Wed, 6 Nov 2024 01:12:46 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=192.198.163.16 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1730855568; cv=none; b=V03p4Ag2GvXJRD8uWerBC5FKkMKhrGD/ukLHCpI+lQtsszAmfbJ1D6whSaezogUfi1J6UcAGZ8Qc0XlKwaZuXeWecTEh4RIjKC0BqcY0l8/KqVycwUJ1DRYmF39xe+hcYgFxrhAiUhc/ke8oIBmazqX5qNse0sOLUtdJDvh0eig= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1730855568; c=relaxed/simple; bh=4HF3rwA/AvxO3Knhf+XcS3MMF6XDQAoU3kzYc67y7fw=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=MElsk5tUoZNxRM4C9HwZaTeSxw7fdfjFlx8mDn0OdXIlnMYVcQMJk01etTPzaiXy2KJRUJ8MNa+/nlRlzZoQgZHUhOwTyJWxUKP1WoMkuXphE+AxjNxojw9k3qWEpzPUHyYHyK1nUn93oCYyjLm+C9py1jpo69fYDg5iVhRMkXs= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com; spf=pass smtp.mailfrom=intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=gOovRyxm; arc=none smtp.client-ip=192.198.163.16 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="gOovRyxm" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1730855567; x=1762391567; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=4HF3rwA/AvxO3Knhf+XcS3MMF6XDQAoU3kzYc67y7fw=; b=gOovRyxmE0qQBXomfWWopldou2NQeFXPjdKtENpjyNxC3cyOlu+t7lDD F4ElqBm2+jrbcSW3ZFQPtcFmtcYKwEffoxWegl6HXuIdgw587LU2cJqA1 kAzZ1HxL2yEX7jpGMZgnw68cWDHSgK6oLD0E8J50wr4V2nfTUfI4b+q+N i6JqS7bMlaXp6V8SwrlPMPT9TVY0C0R3i3+OIOltmRobU8etM8iah50qm aPmukA35bHWdeTs/KYNmfQvQmue/slf0rsrbPEHUBszoY6GZTw451kfV7 eVIULZfGA76WOcLjUcDq3McBLGwGqTy4uI06m+VMN6MMBHS9WvJAi6HCU g==; X-CSE-ConnectionGUID: UCYtPL2nShyI+Sk5Ia2a1w== X-CSE-MsgGUID: xZ1H1HrfSYGNI8y/jAPaHg== X-IronPort-AV: E=McAfee;i="6700,10204,11247"; a="18254765" X-IronPort-AV: E=Sophos;i="6.11,261,1725346800"; d="scan'208";a="18254765" Received: from fmviesa008.fm.intel.com ([10.60.135.148]) by fmvoesa110.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 05 Nov 2024 17:12:46 -0800 X-CSE-ConnectionGUID: xEOV3UogSKqou3OpRiUuqg== X-CSE-MsgGUID: 93TWSWv/Rb6U/eR9zWtyRA== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.11,261,1725346800"; d="scan'208";a="84362797" Received: from amlin-018-114.igk.intel.com ([10.102.18.114]) by fmviesa008.fm.intel.com with ESMTP; 05 Nov 2024 17:12:43 -0800 From: Arkadiusz Kubalewski To: netdev@vger.kernel.org, linux-kernel@vger.kernel.org, intel-wired-lan@lists.osuosl.org Cc: anthony.l.nguyen@intel.com, przemyslaw.kitszel@intel.com, davem@davemloft.net, edumazet@google.com, kuba@kernel.org, pabeni@redhat.com, richardcochran@gmail.com, Arkadiusz Kubalewski , Aleksandr Loktionov Subject: [PATCH net-next v3 2/2] ice: ptp: add control over HW timestamp latch point Date: Wed, 6 Nov 2024 02:07:56 +0100 Message-Id: <20241106010756.1588973-3-arkadiusz.kubalewski@intel.com> X-Mailer: git-send-email 2.38.1 In-Reply-To: <20241106010756.1588973-1-arkadiusz.kubalewski@intel.com> References: <20241106010756.1588973-1-arkadiusz.kubalewski@intel.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Patchwork-Delegate: kuba@kernel.org Allow user to control the latch point of ptp HW timestamps in E825 devices. Usage, examples: ** Obtain current state: $ cat /sys/class/net/eth/device/ptp/ts_point Command returns enum/integer: * 1 - timestamp latched by PHY at the beginning of SFD, * 2 - timestamp latched by PHY after the SFD, * None - callback returns error to the user. ** Configure timestamp latch point at the beginning of SFD: $ echo 1 > /sys/class/net/eth/device/ptp/ts_point ** Configure timestamp latch point after the SFD: $ echo 2 > /sys/class/net/eth/device/ptp/ts_point Reviewed-by: Aleksandr Loktionov Signed-off-by: Arkadiusz Kubalewski --- v3: - improve readability, for "nothing to do" logic - /s/PTP/ptp - remove 'tx' from docs description --- drivers/net/ethernet/intel/ice/ice_ptp.c | 44 +++++++++++++++ drivers/net/ethernet/intel/ice/ice_ptp_hw.c | 60 +++++++++++++++++++++ drivers/net/ethernet/intel/ice/ice_ptp_hw.h | 2 + 3 files changed, 106 insertions(+) diff --git a/drivers/net/ethernet/intel/ice/ice_ptp.c b/drivers/net/ethernet/intel/ice/ice_ptp.c index a999fface272..c351c9707394 100644 --- a/drivers/net/ethernet/intel/ice/ice_ptp.c +++ b/drivers/net/ethernet/intel/ice/ice_ptp.c @@ -2509,6 +2509,48 @@ static int ice_ptp_parse_sdp_entries(struct ice_pf *pf, __le16 *entries, return 0; } +/** + * ice_get_ts_point - get the timestamp latch point + * @info: the driver's ptp info structure + * @point: returns the configured 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; + int ret; + + ice_ptp_lock(hw); + ret = ice_ptp_hw_ts_point_get(hw, point); + ice_ptp_unlock(hw); + + return ret; +} + +/** + * ice_set_ts_point - set the timestamp latch point + * @info: the driver's ptp info structure + * @point: requested timestamp latch point + * + * Return: 0 on success, negative on failure. + */ +static int ice_set_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; + int ret; + + ice_ptp_lock(hw); + ret = ice_ptp_hw_ts_point_set(hw, point); + ice_ptp_unlock(hw); + + return ret; +} + /** * ice_ptp_set_funcs_e82x - Set specialized functions for E82X support * @pf: Board private structure @@ -2529,6 +2571,8 @@ 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 dfd49732bd5b..06c32f180932 100644 --- a/drivers/net/ethernet/intel/ice/ice_ptp_hw.c +++ b/drivers/net/ethernet/intel/ice/ice_ptp_hw.c @@ -6320,3 +6320,63 @@ 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 timestamps are latched on/post SFD + * @hw: pointer to the HW struct + * @point: return the configured timestamp latch point + * + * Verify if HW timestamping point is configured to latch 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, enum ptp_ts_point *point) +{ + 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) + *point = PTP_TS_POINT_SFD; + else + *point = PTP_TS_POINT_POST_SFD; + + return err; +} + +/** + * ice_ptp_hw_ts_point_set - configure timestamping on/post SFD + * @hw: pointer to the HW struct + * @point: requested timestamp latch point + * + * 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, enum ptp_ts_point point) +{ + 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) && point == PTP_TS_POINT_SFD) + return -EINVAL; + if (!(val & PHY_MAC_XIF_TS_SFD_ENA_M) && + point == PTP_TS_POINT_POST_SFD) + return -EINVAL; + if (point == PTP_TS_POINT_SFD) + val |= PHY_MAC_XIF_TS_SFD_ENA_M; + else if (point == PTP_TS_POINT_POST_SFD) + val &= ~PHY_MAC_XIF_TS_SFD_ENA_M; + else + return -EINVAL; + + 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 47af7c5c79b8..5e4edaee063e 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, enum ptp_ts_point *point); +int ice_ptp_hw_ts_point_set(struct ice_hw *hw, enum ptp_ts_point point); /* E822 family functions */ int ice_read_quad_reg_e82x(struct ice_hw *hw, u8 quad, u16 offset, u32 *val);