diff mbox series

[v2] net/ice: fix incorrect reading of PHY timestamp

Message ID 20241030021611.871536-1-soumyadeep.hore@intel.com (mailing list archive)
State Superseded, archived
Delegated to: Bruce Richardson
Headers
Series [v2] net/ice: fix incorrect reading of PHY timestamp |

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Commit Message

Soumyadeep Hore Oct. 30, 2024, 2:16 a.m. UTC 
In ICE PMD, previously the ready bitmap checking before reading
PHY timestamp was not present. This caused incorrect Tx
timestamping.

The ready bitmap checking is enabled and PHY timestamp is read once
the ready bitmap gives positive value.

Fixes: 881169950d80 ("net/ice/base: implement initial PTP support for E830")
Cc: stable@dpdk.org

Signed-off-by: Soumyadeep Hore <soumyadeep.hore@intel.com>
---
v2:
- Addressed Bruce's comments
---
 drivers/net/ice/ice_ethdev.c | 18 +++++++++++++++++-
 1 file changed, 17 insertions(+), 1 deletion(-)

Comments

Bruce Richardson Oct. 30, 2024, 3:31 p.m. UTC | #1 
On Wed, Oct 30, 2024 at 02:16:11AM +0000, Soumyadeep Hore wrote:
> In ICE PMD, previously the ready bitmap checking before reading
> PHY timestamp was not present. This caused incorrect Tx
> timestamping.
> 
> The ready bitmap checking is enabled and PHY timestamp is read once
> the ready bitmap gives positive value.
> 
> Fixes: 881169950d80 ("net/ice/base: implement initial PTP support for E830")
> Cc: stable@dpdk.org
> 
> Signed-off-by: Soumyadeep Hore <soumyadeep.hore@intel.com>
> ---
> v2:
> - Addressed Bruce's comments
> ---
>  drivers/net/ice/ice_ethdev.c | 18 +++++++++++++++++-
>  1 file changed, 17 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/net/ice/ice_ethdev.c b/drivers/net/ice/ice_ethdev.c
> index 70298ac330..6d0d37b3a0 100644
> --- a/drivers/net/ice/ice_ethdev.c
> +++ b/drivers/net/ice/ice_ethdev.c
> @@ -6597,10 +6597,26 @@ ice_timesync_read_tx_timestamp(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 ts_ns, tstamp;
> +	uint64_t ts_ns, tstamp, tstamp_ready = 0;
> +	uint64_t end_time;
>  	const uint64_t mask = 0xFFFFFFFF;
>  	int ret;
>  
> +	end_time = rte_get_timer_cycles() + rte_get_timer_hz();
> +

Patch code itself looks fine, but don't you think that 1sec is an
excessively long time to wait? Maybe do a V3 with a lower timeout
threshold.

/Bruce
diff mbox series

Patch

diff --git a/drivers/net/ice/ice_ethdev.c b/drivers/net/ice/ice_ethdev.c
index 70298ac330..6d0d37b3a0 100644
--- a/drivers/net/ice/ice_ethdev.c
+++ b/drivers/net/ice/ice_ethdev.c
@@ -6597,10 +6597,26 @@  ice_timesync_read_tx_timestamp(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 ts_ns, tstamp;
+	uint64_t ts_ns, tstamp, tstamp_ready = 0;
+	uint64_t end_time;
 	const uint64_t mask = 0xFFFFFFFF;
 	int ret;
 
+	end_time = rte_get_timer_cycles() + rte_get_timer_hz();
+
+	while (!(tstamp_ready & BIT_ULL(0))) {
+		ret = ice_get_phy_tx_tstamp_ready(hw, ad->ptp_tx_block, &tstamp_ready);
+		if (ret) {
+			PMD_DRV_LOG(ERR, "Failed to get phy ready for timestamp");
+			return -1;
+		}
+
+		if (rte_get_timer_cycles() > end_time) {
+			PMD_DRV_LOG(ERR, "Timeout to get phy ready for timestamp");
+			return -1;
+		}
+	}
+
 	ret = ice_read_phy_tstamp(hw, ad->ptp_tx_block, ad->ptp_tx_index, &tstamp);
 	if (ret || tstamp == 0) {
 		PMD_DRV_LOG(ERR, "Failed to read phy timestamp");