[dpdk-dev] [PATCH] e1000: fix ieee1588 timestamp issue

[Wenzhuo Lu <wenzhuo.lu@intel.com>]

Ieee1588 reads system time to set its timestamp. On 1G NICs, for example,
i350, system time is disabled by default. It means the ieee1588 timestamp
will always be 0.
This patch enables system time when ieee1588 is enabled.

Signed-off-by: Wenzhuo Lu <wenzhuo.lu@intel.com>
---
 drivers/net/e1000/igb_ethdev.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/net/e1000/igb_ethdev.c b/drivers/net/e1000/igb_ethdev.c
index 56734a3..8fb67ac 100644
--- a/drivers/net/e1000/igb_ethdev.c
+++ b/drivers/net/e1000/igb_ethdev.c
@@ -3898,11 +3898,19 @@ eth_igb_set_mc_addr_list(struct rte_eth_dev *dev,
 	return 0;
 }
 
+#define E1000_TSAUXC_DISABLE_SYSTIME 0x80000000
+
 static int
 igb_timesync_enable(struct rte_eth_dev *dev)
 {
 	struct e1000_hw *hw = E1000_DEV_PRIVATE_TO_HW(dev->data->dev_private);
 	uint32_t tsync_ctl;
+	uint32_t tsauxc;
+
+	/* Enable system time for it isn't on by default. */
+	tsauxc = E1000_READ_REG(hw, E1000_TSAUXC);
+	tsauxc &= ~E1000_TSAUXC_DISABLE_SYSTIME;
+	E1000_WRITE_REG(hw, E1000_TSAUXC, tsauxc);
 
 	/* Start incrementing the register used to timestamp PTP packets. */
 	E1000_WRITE_REG(hw, E1000_TIMINCA, E1000_TIMINCA_INIT);
-- 
1.9.3