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sfc: use hardware tx timestamps for more than PTP

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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: Bert Kenward <bkenward@solarflare.com>
Signed-off-by: Edward Cree <ecree@xilinx.com>
Link: https://lore.kernel.org/r/510652dc-54b4-0e11-657e-e37ee3ca26a9@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Bert Kenward 2022-04-07 16:24:02 +01:00 committed by Jakub Kicinski
parent 58389c00d4
commit bd4a2697e5
1 changed files with 2 additions and 1 deletions
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3
drivers/net/ethernet/sfc/tx.c
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@ -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.