[PATCH] net/ice: fix incorrect Rx timestamp in Windows PTP

[Simei Su]

Rx PHY timer init value is not same as primary timer init value when
power up which will lead Rx timestamp always have big gap compared
with PTP timestamp. This patch adds PHC init time in initializing PTP
hardware clock.

Fixes: 646dcbe6c701 ("net/ice: support IEEE 1588 PTP")
Cc: stable at dpdk.org

Signed-off-by: Simei Su <simei.su at intel.com>
---
 drivers/net/ice/ice_ethdev.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/drivers/net/ice/ice_ethdev.c b/drivers/net/ice/ice_ethdev.c
index 13a7a97..d57355d 100644
--- a/drivers/net/ice/ice_ethdev.c
+++ b/drivers/net/ice/ice_ethdev.c
@@ -5501,6 +5501,8 @@ ice_timesync_enable(struct rte_eth_dev *dev)
 	struct ice_hw *hw = ICE_DEV_PRIVATE_TO_HW(dev->data->dev_private);
 	struct ice_adapter *ad =
 			ICE_DEV_PRIVATE_TO_ADAPTER(dev->data->dev_private);
+	uint64_t start_time;
+	struct timespec system_time;
 	int ret;
 
 	if (dev->data->dev_started && !(dev->data->dev_conf.rxmode.offloads &
@@ -5522,6 +5524,15 @@ ice_timesync_enable(struct rte_eth_dev *dev)
 				"Failed to write PHC increment time value");
 			return -1;
 		}
+
+		clock_gettime(CLOCK_MONOTONIC, &system_time);
+		start_time = system_time.tv_sec * NSEC_PER_SEC +
+			     system_time.tv_nsec;
+		ret = ice_ptp_init_time(hw, start_time);
+		if (ret) {
+			PMD_DRV_LOG(ERR, "Failed to write PHC initial time");
+			return -1;
+		}
 	}
 
 	/* Initialize cycle counters for system time/RX/TX timestamp */
-- 
2.9.5