netdev - Re: [net-next, v4, 05/11] ethtool: add a new command for getting PHC virtual clocks

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Date:   Sun, 29 Aug 2021 19:04:15 +0200
From:   Michal Kubecek <mkubecek@...e.cz>
To:     Yangbo Lu <yangbo.lu@....com>
Cc:     netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-kselftest@...r.kernel.org, mptcp@...ts.linux.dev,
        Richard Cochran <richardcochran@...il.com>,
        "David S . Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Mat Martineau <mathew.j.martineau@...ux.intel.com>,
        Matthieu Baerts <matthieu.baerts@...sares.net>,
        Shuah Khan <shuah@...nel.org>,
        Florian Fainelli <f.fainelli@...il.com>,
        Andrew Lunn <andrew@...n.ch>, Rui Sousa <rui.sousa@....com>,
        Sebastien Laveze <sebastien.laveze@....com>
Subject: Re: [net-next, v4, 05/11] ethtool: add a new command for getting PHC
 virtual clocks

On Fri, Jun 25, 2021 at 05:35:07PM +0800, Yangbo Lu wrote:
> Add an interface for getting PHC (PTP Hardware Clock)
> virtual clocks, which are based on PHC physical clock
> providing hardware timestamp to network packets.
> 
> Signed-off-by: Yangbo Lu <yangbo.lu@....com>

Hello,

do you plan to submit also an ethtool (userspace utility) patch using
this interface?

Michal

> ---
> Changes for v3:
> 	- Added this patch.
> Changes for v4:
> 	- Updated doc.
> 	- Removed ioctl command.
> 	- Replied only the number of vclock index.
> ---
>  Documentation/networking/ethtool-netlink.rst | 22 +++++
>  include/linux/ethtool.h                      | 10 +++
>  include/uapi/linux/ethtool_netlink.h         | 15 ++++
>  net/ethtool/Makefile                         |  2 +-
>  net/ethtool/common.c                         | 13 +++
>  net/ethtool/netlink.c                        | 10 +++
>  net/ethtool/netlink.h                        |  2 +
>  net/ethtool/phc_vclocks.c                    | 94 ++++++++++++++++++++
>  8 files changed, 167 insertions(+), 1 deletion(-)
>  create mode 100644 net/ethtool/phc_vclocks.c
> 
> diff --git a/Documentation/networking/ethtool-netlink.rst b/Documentation/networking/ethtool-netlink.rst
> index 6ea91e41593f..c86628e6a235 100644
> --- a/Documentation/networking/ethtool-netlink.rst
> +++ b/Documentation/networking/ethtool-netlink.rst
> @@ -212,6 +212,7 @@ Userspace to kernel:
>    ``ETHTOOL_MSG_FEC_SET``               set FEC settings
>    ``ETHTOOL_MSG_MODULE_EEPROM_GET``     read SFP module EEPROM
>    ``ETHTOOL_MSG_STATS_GET``             get standard statistics
> +  ``ETHTOOL_MSG_PHC_VCLOCKS_GET``       get PHC virtual clocks info
>    ===================================== ================================
>  
>  Kernel to userspace:
> @@ -250,6 +251,7 @@ Kernel to userspace:
>    ``ETHTOOL_MSG_FEC_NTF``                  FEC settings
>    ``ETHTOOL_MSG_MODULE_EEPROM_GET_REPLY``  read SFP module EEPROM
>    ``ETHTOOL_MSG_STATS_GET_REPLY``          standard statistics
> +  ``ETHTOOL_MSG_PHC_VCLOCKS_GET_REPLY``    PHC virtual clocks info
>    ======================================== =================================
>  
>  ``GET`` requests are sent by userspace applications to retrieve device
> @@ -1477,6 +1479,25 @@ Low and high bounds are inclusive, for example:
>   etherStatsPkts512to1023Octets 512  1023
>   ============================= ==== ====
>  
> +PHC_VCLOCKS_GET
> +===============
> +
> +Query device PHC virtual clocks information.
> +
> +Request contents:
> +
> +  ====================================  ======  ==========================
> +  ``ETHTOOL_A_PHC_VCLOCKS_HEADER``      nested  request header
> +  ====================================  ======  ==========================
> +
> +Kernel response contents:
> +
> +  ====================================  ======  ==========================
> +  ``ETHTOOL_A_PHC_VCLOCKS_HEADER``      nested  reply header
> +  ``ETHTOOL_A_PHC_VCLOCKS_NUM``         u32     PHC virtual clocks number
> +  ``ETHTOOL_A_PHC_VCLOCKS_INDEX``       s32     PHC index array
> +  ====================================  ======  ==========================
[...]

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