From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pg1-f174.google.com (mail-pg1-f174.google.com [209.85.215.174]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id AE65049620; Wed, 23 Oct 2024 02:12:55 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.215.174 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1729649577; cv=none; b=m7Pbe7ezkjW8O+Eq7jLbNEaX3CxgcZ39g3t+kqs4mg9kIoG92SddHsJoCD+VvCfjIzzSvGN9RQ0nsqHVB2Hpud80jPXLcUd1MwksxO5WIfscUN3fOXvIwUibEwm7EKLBkqjn2GzZ//zjvVmTg2fE4fO0lhSJETrpfHMC64J5HXY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1729649577; c=relaxed/simple; bh=5B9SJRSxpgH+a2QQDn/7m98ugDjbIUWnL6gLprauvRk=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=dce+5z5W0JIPJcyJiAse6+x2XQFn49jYIGgo6FwRPn8RDcZVPd9XYT5d5kSclltWT8E1CNCgsEmpnEHMwPfupDDuj8k+ZqAiQeEBO3KAJxTkjAS/VrRJHGATXSnXTJGZpDCFUZ0Fl13WjIregZDHD/5qs+GJDayZSDm/QcHsuN0= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=Y+kepexT; arc=none smtp.client-ip=209.85.215.174 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="Y+kepexT" Received: by mail-pg1-f174.google.com with SMTP id 41be03b00d2f7-7e6ed072cdaso4484592a12.0; Tue, 22 Oct 2024 19:12:55 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1729649575; x=1730254375; darn=vger.kernel.org; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:from:to:cc:subject:date:message-id:reply-to; bh=5B9SJRSxpgH+a2QQDn/7m98ugDjbIUWnL6gLprauvRk=; b=Y+kepexTL6QJx5ACMu98zYJXd5xH4Epw02GTaIGCTM8NI0Z7eLhhx8izqVziODeZkk tQAeoCUHP7c4D3aL/vvwiQtO1B8ouBIj8tb41ds91I4dFUM+yZ46fayRXGpdmlA8/z4X sF8DT3b2oQ0/jLt7AlkhhK8XLf69QGtsBPlyKQFUrVB8qcGVXeqRleU2JgZWHNTmUn8+ UX1S49M6Y/1hJbvxSvlQ636m9dTXboUUsSERN+Kdc7E/c9EAy3EpEMDT4RNliNNCt+sq HAEJdha2Tt64d6qbyhP0joljKJ/rwXZ5ro6/vNq9iy8BIwyqk4GXQrcQoLSc4giM+4EA o72w== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1729649575; x=1730254375; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:x-gm-message-state:from:to:cc:subject:date :message-id:reply-to; bh=5B9SJRSxpgH+a2QQDn/7m98ugDjbIUWnL6gLprauvRk=; b=jQPqFqJ0EEozQV0u0ME0zIyavJzPkObvgOLsJi5GMAubZpMysy+En6zAKlMMlrAgrc 0m3J0eNzP2UjhYP2JMDa8wfFTXhgcfi1UOspIKHrKoug1ct/YReWFurXV/lPdbVxd97o AOjFrtx7BHQx5Ocj10NurxRj9lOvG+trXqTfzLN3hnTRdLOCQHhQusj1c721qqoQhp/s jHD11TQznYkNlqsCI02IHVM84UwZVaU12qI/uI7dgvy+pFnVad1035kXYY7OyKDTLVCm kRnJs6sQXBowCn/Hq0f6baZLJKdBEJCmbAfnTC7nyXBVS7uTokZMG6W5urmksBr8upAf tq7A== X-Forwarded-Encrypted: i=1; AJvYcCVIVudMNoa0RG+ylUd/SIl5LZvs+tP13myULsI0lUdcH89ftyC5zY4eUl8W6keha06e7pdQSNKGTVXejjo=@vger.kernel.org X-Gm-Message-State: AOJu0YxL/rQn6CZ2/9agKZ8VrtiyedUzP+YDzOWiWz+AFnd7ypv/kjdN tUOBynxd3gW+Samed+xbMit4+hPkckR7YkjUZaWDyX0QVqLbnVhS X-Google-Smtp-Source: AGHT+IFGngh30tPnUsIitqRKW/TXZNiqX2UdKWf1av7Jf6M3yMXoiDLU5ZvkR2C/4+jJbiFyVtgfBw== X-Received: by 2002:a05:6a20:e68c:b0:1d5:1729:35ec with SMTP id adf61e73a8af0-1d978aeac65mr1157129637.7.1729649574879; Tue, 22 Oct 2024 19:12:54 -0700 (PDT) Received: from hoboy.vegasvil.org ([2600:1700:2430:6f6f:e2d5:5eff:fea5:802f]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-2e76dfedbbfsm154240a91.56.2024.10.22.19.12.53 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 22 Oct 2024 19:12:54 -0700 (PDT) Date: Tue, 22 Oct 2024 19:12:46 -0700 From: Richard Cochran To: Arkadiusz Kubalewski Cc: netdev@vger.kernel.org, linux-kernel@vger.kernel.org, intel-wired-lan@lists.osuosl.org, anthony.l.nguyen@intel.com, przemyslaw.kitszel@intel.com, davem@davemloft.net, edumazet@google.com, kuba@kernel.org, pabeni@redhat.com, Aleksandr Loktionov Subject: Re: [PATCH net-next 1/2] ptp: add control over HW timestamp latch point Message-ID: References: <20241021141955.1466979-1-arkadiusz.kubalewski@intel.com> <20241021141955.1466979-2-arkadiusz.kubalewski@intel.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20241021141955.1466979-2-arkadiusz.kubalewski@intel.com> On Mon, Oct 21, 2024 at 04:19:54PM +0200, Arkadiusz Kubalewski wrote: > Currently HW support of PTP/timesync solutions in network PHY chips can be > implemented with two different approaches, the timestamp maybe latched > either at the beginning or after the Start of Frame Delimiter (SFD) [1]. Why did 802.3-2012 change the definition of the time stamp position? Thanks, Richard