From: David S. Miller Date: Mon, 12 Apr 2021 20:34:21 +0000 (-0700) Subject: Merge branch 'enetc-ptp' X-Git-Url: http://git.osdn.net/view?a=commitdiff_plain;h=d27139c54499de361c0be6ddf22b4bbaf416cabd;p=uclinux-h8%2Flinux.git Merge branch 'enetc-ptp' Yangbo Lu says: ==================== enetc: support PTP Sync packet one-step timestamping This patch-set is to add support for PTP Sync packet one-step timestamping. Since ENETC single-step register has to be configured dynamically per packet for correctionField offeset and UDP checksum update, current one-step timestamping packet has to be sent only when the last one completes transmitting on hardware. So, on the TX, this patch handles one-step timestamping packet as below: - Trasmit packet immediately if no other one in transfer, or queue to skb queue if there is already one in transfer. The test_and_set_bit_lock() is used here to lock and check state. - Start a work when complete transfer on hardware, to release the bit lock and to send one skb in skb queue if has. Changes for v2: - Rebased. - Fixed issues from patchwork checks. - netif_tx_lock for one-step timestamping packet sending. Changes for v3: - Used system workqueue. - Set bit lock when transmitted one-step packet, and scheduled work when completed. The worker cleared the bit lock, and transmitted one skb in skb queue if has, instead of a loop. ==================== Signed-off-by: David S. Miller --- d27139c54499de361c0be6ddf22b4bbaf416cabd