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| author | Kory Maincent <kory.maincent@bootlin.com> | 2023-11-14 12:28:36 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2023-11-18 14:52:57 +0000 |
| commit | 11d55be06df0aedf19b05ab61c2d26b31a3c7e64 (patch) | |
| tree | 8d23cbb5b4a7bef39d108dbd1d839a6d9d96cb96 /Documentation/networking | |
| parent | acec05fb78abb74fdab2195bfca9a6d38a732643 (diff) | |
| download | linux-11d55be06df0aedf19b05ab61c2d26b31a3c7e64.tar.gz | |
net: ethtool: Add a command to expose current time stamping layer
Time stamping on network packets may happen either in the MAC or in
the PHY, but not both. In preparation for making the choice
selectable, expose both the current layers via ethtool.
In accordance with the kernel implementation as it stands, the current
layer will always read as "phy" when a PHY time stamping device is
present. Future patches will allow changing the current layer
administratively.
Signed-off-by: Kory Maincent <kory.maincent@bootlin.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'Documentation/networking')
| -rw-r--r-- | Documentation/networking/ethtool-netlink.rst | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/Documentation/networking/ethtool-netlink.rst b/Documentation/networking/ethtool-netlink.rst index 2540c70952ff21..644b3b764044e3 100644 --- a/Documentation/networking/ethtool-netlink.rst +++ b/Documentation/networking/ethtool-netlink.rst @@ -225,6 +225,7 @@ Userspace to kernel: ``ETHTOOL_MSG_RSS_GET`` get RSS settings ``ETHTOOL_MSG_MM_GET`` get MAC merge layer state ``ETHTOOL_MSG_MM_SET`` set MAC merge layer parameters + ``ETHTOOL_MSG_TS_GET`` get current timestamping ===================================== ================================= Kernel to userspace: @@ -268,6 +269,7 @@ Kernel to userspace: ``ETHTOOL_MSG_PSE_GET_REPLY`` PSE parameters ``ETHTOOL_MSG_RSS_GET_REPLY`` RSS settings ``ETHTOOL_MSG_MM_GET_REPLY`` MAC merge layer status + ``ETHTOOL_MSG_TS_GET_REPLY`` current timestamping ======================================== ================================= ``GET`` requests are sent by userspace applications to retrieve device @@ -1994,6 +1996,26 @@ The attributes are propagated to the driver through the following structure: .. kernel-doc:: include/linux/ethtool.h :identifiers: ethtool_mm_cfg +TS_GET +====== + +Gets current timestamping. + +Request contents: + + ================================= ====== ==================== + ``ETHTOOL_A_TS_HEADER`` nested request header + ================================= ====== ==================== + +Kernel response contents: + + ======================= ====== ============================== + ``ETHTOOL_A_TS_HEADER`` nested reply header + ``ETHTOOL_A_TS_LAYER`` u32 current timestamping + ======================= ====== ============================== + +This command get the current timestamp layer. + Request translation =================== @@ -2100,4 +2122,5 @@ are netlink only. n/a ``ETHTOOL_MSG_PLCA_GET_STATUS`` n/a ``ETHTOOL_MSG_MM_GET`` n/a ``ETHTOOL_MSG_MM_SET`` + n/a ``ETHTOOL_MSG_TS_GET`` =================================== ===================================== |