[PATCH v1] net/ice: fix incorrect reading of PHY timestamp

[PATCH v1] net/ice: fix incorrect reading of PHY timestamp

[Soumyadeep Hore]

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>
---
 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..efc6db4346 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 start_time, curr_time;
 	const uint64_t mask = 0xFFFFFFFF;
 	int ret;
 
+	start_time = rte_get_timer_cycles() / (rte_get_timer_hz() / 1000);
+
+	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;
+		}
+		curr_time = rte_get_timer_cycles() / (rte_get_timer_hz() / 1000);
+		if (curr_time - start_time > 1000) {
+			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");
-- 
2.43.0

Re: [PATCH v1] net/ice: fix incorrect reading of PHY timestamp

[Singh, Aman Deep]

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On 25-10-2024 15:56, 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>

Acked-by: Aman Singh<aman.deep.singh@intel.com>

> ---
>   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..efc6db4346 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 start_time, curr_time;
>   	const uint64_t mask = 0xFFFFFFFF;
>   	int ret;
>   
> +	start_time = rte_get_timer_cycles() / (rte_get_timer_hz() / 1000);
> +
> +	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;
> +		}
> +		curr_time = rte_get_timer_cycles() / (rte_get_timer_hz() / 1000);
> +		if (curr_time - start_time > 1000) {
> +			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");

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Re: [PATCH v1] net/ice: fix incorrect reading of PHY timestamp

[Bruce Richardson]

On Tue, Oct 29, 2024 at 04:07:45PM +0530, Singh, Aman Deep wrote:
>    On 25-10-2024 15:56, 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: [1]stable@dpdk.org
> 
> Signed-off-by: Soumyadeep Hore [2]<soumyadeep.hore@intel.com>
> 
> Acked-by: Aman Singh [3]<aman.deep.singh@intel.com>
> 
Is this a v5 of this patch, or a resubmission of v1? There are 3 different
v1's of this patch, plus a v2, v3 and v4 listed in patchwork, see [1].
I had feedback on v3 of this patch, which I believe is still relevant to
this version.

Please keep all revisions of a patch in the one thread and with increasing
version number, saves us reviewers getting confused! :-) 
Also, with each new version, please include a summary below the cutline of
what has changed from previous, so we know what to look out for when
reviewing.

/Bruce

[1] https://patches.dpdk.org/project/dpdk/list/?series=&submitter=&state=*&q=fix+incorrect+reading+of+PHY&archive=&delegate=

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

[Soumyadeep Hore]

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();
+
+	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");
-- 
2.43.0

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

[Soumyadeep Hore]

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>
---
 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 7b1bd163a2..e0db47cf28 100644
--- a/drivers/net/ice/ice_ethdev.c
+++ b/drivers/net/ice/ice_ethdev.c
@@ -6517,12 +6517,28 @@ ice_timesync_read_tx_timestamp(struct rte_eth_dev *dev,
 	struct ice_adapter *ad =
 			ICE_DEV_PRIVATE_TO_ADAPTER(dev->data->dev_private);
 	uint8_t lport;
-	uint64_t ts_ns, ns, tstamp;
+	uint64_t ts_ns, ns, tstamp, tstamp_ready = 0;
+	uint64_t start_time, curr_time;
 	const uint64_t mask = 0xFFFFFFFF;
 	int ret;
 
 	lport = hw->port_info->lport;
 
+	start_time = rte_get_timer_cycles() / (rte_get_timer_hz() / 1000);
+
+	while (!(tstamp_ready & BIT_ULL(0))) {
+		ret = ice_get_phy_tx_tstamp_ready(hw, lport, &tstamp_ready);
+		if (ret) {
+			PMD_DRV_LOG(ERR, "Failed to get phy ready for timestamp");
+			return -1;
+		}
+		curr_time = rte_get_timer_cycles() / (rte_get_timer_hz() / 1000);
+		if (curr_time - start_time > 1000) {
+			PMD_DRV_LOG(ERR, "Timeout to get phy ready for timestamp");
+			return -1;
+		}
+	}
+
 	ret = ice_read_phy_tstamp(hw, lport, 0, &tstamp);
 	if (ret) {
 		PMD_DRV_LOG(ERR, "Failed to read phy timestamp");
-- 
2.43.0