Commit bd4a2697 authored by Bert Kenward's avatar Bert Kenward Committed by Jakub Kicinski
Browse files

sfc: use hardware tx timestamps for more than PTP 



The 8000 series and newer NICs all get hardware timestamps from the MAC
 and can provide timestamps on a normal TX queue, rather than via a slow
 path through the MC. As such we can use this path for any packet where a
 hardware timestamp is requested.
This also enables support for PTP over transports other than IPv4+UDP.

Signed-off-by: default avatarBert Kenward <bkenward@solarflare.com>
Signed-off-by: default avatarEdward Cree <ecree@xilinx.com>
Link: https://lore.kernel.org/r/510652dc-54b4-0e11-657e-e37ee3ca26a9@gmail.com


Signed-off-by: default avatarJakub Kicinski <kuba@kernel.org>
parent 58389c00

drivers/net/ethernet/sfc/tx.c

+2 −1
Original line number Diff line number Diff line
@@ -527,7 +527,8 @@ netdev_tx_t efx_hard_start_xmit(struct sk_buff *skb, 


	/* PTP "event" packet */

	if (unlikely(efx_xmit_with_hwtstamp(skb)) &&

	    unlikely(efx_ptp_is_ptp_tx(efx, skb))) {

	    ((efx_ptp_use_mac_tx_timestamps(efx) && efx->ptp_data) ||

	    unlikely(efx_ptp_is_ptp_tx(efx, skb)))) {

		/* There may be existing transmits on the channel that are

		 * waiting for this packet to trigger the doorbell write.

		 * We need to send the packets at this point.