On Thu, Aug 14, 2014 at 06:07:29AM +0000, Sriharsha Basavapatna wrote:
> May be I didn't explain it clearly earlier.
>
> I understand one-step mode is where HW support is needed and our hardware does
> insert the timestamp. But because the protocol stack sets the SKBTX_HW_TSTAMP
> bit in the skb, the driver (which is supposed to return the tx timestamp back
> up the stack based on this flag) can't distinguish this as a special case for
Yes, it can.
/*
* Enables time stamping for outgoing packets just as
* HWTSTAMP_TX_ON does, but also enables time stamp insertion
* directly into Sync packets. In this case, transmitted Sync
* packets will not received a time stamp via the socket error
* queue.
*/
HWTSTAMP_TX_ONESTEP_SYNC,
Thanks,
Richard
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