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net: Introduce peer to peer one step PTP time stamping.

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The 1588 standard defines one step operation for both Sync and
PDelay_Resp messages.  Up until now, hardware with P2P one step has
been rare, and kernel support was lacking.  This patch adds support of
the mode in anticipation of new hardware developments.

Signed-off-by: Richard Cochran <richardcochran@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Richard Cochran 2019-12-25 18:16:19 -08:00 • committed by David S. Miller
parent 1dca22b184
commit b6fd7b9636
6 changed files with 15 additions and 0 deletions
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1
net/core/dev_ioctl.c
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@ -187,6 +187,7 @@ static int net_hwtstamp_validate(struct ifreq *ifr)
case HWTSTAMP_TX_OFF:
case HWTSTAMP_TX_ON:
case HWTSTAMP_TX_ONESTEP_SYNC:
case HWTSTAMP_TX_ONESTEP_P2P:
tx_type_valid = 1;
break;
}