[PATCH v1 1/3] net/ixgbe: initialize PTP to system time

[Anatoly Burakov <anatoly.burakov@intel.com>]

Currently, ixgbe driver initializes PTP timestamp to 0. This is different
from what kernel driver does (which initializes it to system time).

Align the DPDK driver to kernel driver by setting PTP timestamp to system
time when enabling PTP.

Note that ixgbe driver always uses zero-based timestamps for PTP, so we
would only ever update the internal timecounter and not the actual NIC
registers.

Signed-off-by: Anatoly Burakov <anatoly.burakov@intel.com>
---
 drivers/net/ixgbe/ixgbe_ethdev.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/drivers/net/ixgbe/ixgbe_ethdev.c b/drivers/net/ixgbe/ixgbe_ethdev.c
index d02d1e43a3..8bc706f97b 100644
--- a/drivers/net/ixgbe/ixgbe_ethdev.c
+++ b/drivers/net/ixgbe/ixgbe_ethdev.c
@@ -6924,6 +6924,12 @@ ixgbe_timesync_enable(struct rte_eth_dev *dev)
 	struct ixgbe_hw *hw = IXGBE_DEV_PRIVATE_TO_HW(dev->data->dev_private);
 	uint32_t tsync_ctl;
 	uint32_t tsauxc;
+	struct timespec ts;
+
+	memset(&ts, 0, sizeof(struct timespec));
+
+	/* get current system time */
+	clock_gettime(CLOCK_REALTIME, &ts);
 
 	/* Stop the timesync system time. */
 	IXGBE_WRITE_REG(hw, IXGBE_TIMINCA, 0x0);
@@ -6956,6 +6962,9 @@ ixgbe_timesync_enable(struct rte_eth_dev *dev)
 
 	IXGBE_WRITE_FLUSH(hw);
 
+	/* ixgbe uses zero-based timestamping so only adjust timecounter */
+	ixgbe_timesync_write_time(dev, &ts);
+
 	return 0;
 }
 
-- 
2.43.5