net/bnxt: fix Tx timestamp init

Fix to read the sequence ID register to get Tx timestamp.
Reading the sequence ID register is necessary for the HW FIFO to
advance and thereby get the correct value of the timestamp on Tx side.
This patch fixes that.

Fixes: b11cceb83a34 ("net/bnxt: support timesync")
Cc: stable@dpdk.org
Reviewed-by: Kalesh AP <kalesh-anakkur.purayil@broadcom.com>
Reviewed-by: Lance Richardson <lance.richardson@broadcom.com>
Reviewed-by: Ajit Khaparde <ajit.khaparde@broadcom.com>
Signed-off-by: Somnath Kotur <somnath.kotur@broadcom.com>

diff --git a/drivers/net/bnxt/bnxt_ethdev.c b/drivers/net/bnxt/bnxt_ethdev.c
index f1dd40591fb4ac5c07af4d1feac88152f4906506..57a409c0b7d46f9c02464df3206b7e73422cdc8a 100644 (file)
--- a/drivers/net/bnxt/bnxt_ethdev.c
+++ b/drivers/net/bnxt/bnxt_ethdev.c
@@ -3377,6 +3377,7 @@ static int bnxt_get_tx_ts(struct bnxt *bp, uint64_t *ts)
                                ptp->tx_mapped_regs[BNXT_PTP_TX_TS_L]));
        *ts |= (uint64_t)rte_le_to_cpu_32(rte_read32((uint8_t *)bp->bar0 +
                                ptp->tx_mapped_regs[BNXT_PTP_TX_TS_H])) << 32;
+       rte_read32((uint8_t *)bp->bar0 + ptp->tx_mapped_regs[BNXT_PTP_TX_SEQ]);
 
        return 0;
 }