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| author | Christian Eggers <ceggers@arri.de> | 2023-01-10 09:49:24 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2023-01-13 09:40:41 +0100 |
| commit | 90188fff655d8efad79acdf60c3012ffcbbef716 (patch) | |
| tree | ba4f788ba0e8de376ca8f9614880c9db4b161435 /mm | |
| parent | net: ptp: add helper for one-step P2P clocks (diff) | |
| download | linux-90188fff655d8efad79acdf60c3012ffcbbef716.tar.xz linux-90188fff655d8efad79acdf60c3012ffcbbef716.zip | |
net: dsa: microchip: ptp: add packet reception timestamping
Rx Timestamping is done through 4 additional bytes in tail tag.
Whenever the ptp packet is received, the 4 byte hardware time stamped
value is added before 1 byte tail tag. Also, bit 7 in tail tag indicates
it as PTP frame. This 4 byte value is extracted from the tail tag and
reconstructed to absolute time and assigned to skb hwtstamp.
If the packet received in PDelay_Resp, then partial ingress timestamp
is subtracted from the correction field. Since user space tools expects
to be done in hardware.
Signed-off-by: Christian Eggers <ceggers@arri.de>
Co-developed-by: Arun Ramadoss <arun.ramadoss@microchip.com>
Signed-off-by: Arun Ramadoss <arun.ramadoss@microchip.com>
Reviewed-by: Vladimir Oltean <olteanv@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'mm')
0 files changed, 0 insertions, 0 deletions