Dear All:
On 82574L Chipset, e1000e work well when I need RX hwtimestamp, but
it doesn’t work when I need TX hwtimestamp
Legacy Transmit Descriptor Format is used, and I set the TS bit of
ExtCMD to indicates to the 82574 to put a time stamp on the packet
designated by the descriptor, of course, I also set the bit4 of TSYNCTXCTL
to enable TX timestamp.
But, it doesn’t work, when I read bit0 of TSYNCTXCTL(TX timestamp
valid bit) in the TX interrupt service routine(packet has been transmitted),
I got zero, and TXSTMPL/H are also filled zero.
Any advise to solve this problem is welcome
[email protected] li.ang
Thanks a lot
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