net: dsa: forward timestamping callbacks to switch drivers
authorBrandon Streiff <brandon.streiff@ni.com>
Wed, 14 Feb 2018 00:07:49 +0000 (01:07 +0100)
committerDavid S. Miller <davem@davemloft.net>
Wed, 14 Feb 2018 19:33:37 +0000 (14:33 -0500)
commit90af1059c52c0031f3bfd8279c9ede153ca83275
tree66b3f0407a9189ef36649951fc8da47305028a8c
parent0336369d3a4d65c9332476b618ff3bb9b41045e1
net: dsa: forward timestamping callbacks to switch drivers

Forward the rx/tx timestamp machinery from the dsa infrastructure to the
switch driver.

On the rx side, defer delivery of skbs until we have an rx timestamp.
This mimicks the behavior of skb_defer_rx_timestamp.

On the tx side, identify PTP packets, clone them, and pass them to the
underlying switch driver before we transmit. This mimicks the behavior
of skb_tx_timestamp.

Adjusted txstamp API to keep the allocation and freeing of the clone
in the same central function by Richard Cochran

Signed-off-by: Brandon Streiff <brandon.streiff@ni.com>
Signed-off-by: Richard Cochran <richardcochran@gmail.com>
Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
include/net/dsa.h
net/dsa/dsa.c
net/dsa/slave.c