It seems that there is no support for RTE_ETH_TX_OFFLOAD_SEND_ON_TIMESTAMP on Intel's 700/800 series chips in any DPDK release (although, there is support for the 225/226 chips). I have done as thorough of a search on this as I can, but wanted to reach out to actual devs before giving up.
I guess I am hoping to simply confirm, from anyone with knowledge of the subject, that there is in fact no such support in any forthcoming patches / DPDK releases / driver revisions / etc. It would also be interesting to know whether the hardware is even capable of this feature - if so, maybe it would not be too complicated to implement it? Especially since there is an example in net/igc to work from.. Thanks! Trey