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net: support time stamping in phy devices.

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This patch adds a new networking option to allow hardware time stamps
from PHY devices. When enabled, likely candidates among incoming and
outgoing network packets are offered to the PHY driver for possible
time stamping. When accepted by the PHY driver, incoming packets are
deferred for later delivery by the driver.

The patch also adds phylib driver methods for the SIOCSHWTSTAMP ioctl
and callbacks for transmit and receive time stamping. Drivers may
optionally implement these functions.

Signed-off-by: Richard Cochran <richard.cochran@omicron.at>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Richard Cochran 2010-07-17 08:49:36 +00:00 • committed by David S. Miller
parent 15f0127d1d
commit c1f19b51d1
10 changed files with 208 additions and 1 deletions
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10
net/Kconfig
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@ -86,6 +86,16 @@ config NETWORK_SECMARK
to nfmark, but designated for security purposes.
If you are unsure how to answer this question, answer N.
config NETWORK_PHY_TIMESTAMPING
bool "Timestamping in PHY devices"
depends on EXPERIMENTAL
help
This allows timestamping of network packets by PHYs with
hardware timestamping capabilities. This option adds some
overhead in the transmit and receive paths.
If you are unsure how to answer this question, answer N.
menuconfig NETFILTER
bool "Network packet filtering framework (Netfilter)"
---help---