From: Tony Nguyen <anthony.l.nguyen@intel.com>
To: davem@davemloft.net, kuba@kernel.org, pabeni@redhat.com,
edumazet@kernel.org, andrew+netdev@lunn.ch,
netdev@vger.kernel.org
Cc: Maciek Machnikowski <maciej.machnikowski@intel.com>,
anthony.l.nguyen@intel.com, jacob.e.keller@intel.com,
przemyslaw.korba@intel.com, grzegorz.nitka@intel.com,
sergey.temerkhanov@intel.com, arkadiusz.kubalewski@intel.com,
poros@redhat.com, richardcochran@gmail.com, horms@kernel.org,
Paul Menzel <pmenzel@molgen.mpg.de>,
Aleksandr Loktionov <aleksandr.loktionov@intel.com>,
Alexander Nowlin <alexander.nowlin@intel.com>
Subject: [PATCH net v2 15/15] ice: Recalibrate PHY after settime64 on E825-C
Date: Thu, 8 Oct 2026 14:56:12 -0700 [thread overview]
Message-ID: <20261008215614.1987250-16-anthony.l.nguyen@intel.com> (raw)
In-Reply-To: <20261008215614.1987250-1-anthony.l.nguyen@intel.com>
From: Maciek Machnikowski <maciej.machnikowski@intel.com>
The PHY on E825-C requires recalibration after large jumps of the
system time. This step is required and is done for E822 devices
previously, but was accidentally skipped due to oversight when
E825-C support was added.
Lack of recalibration will fail to converge quickly as the effective
adjustment requested is not applied properly to the PHY timestamps,
so the readings from the timestamp are incorrect.
Without the fix:
> ptp4l[12591.505]: port 1 (eno8303np0): SLAVE to UNCALIBRATED on SYNCHRONIZATION_FAULT
> ptp4l[12591.951]: port 1 (eno8303np0): UNCALIBRATED to SLAVE on MASTER_CLOCK_SELECTED
> ptp4l[12592.027]: rms 752851973 max 1102277559 freq -84408798 +/- 53560133 delay 6009 +/- 92308
> ptp4l[12593.038]: rms 91302045 max 136894784 freq +100000000 +/- 0 delay 93700 +/- 24153
> ptp4l[12594.050]: rms 16036314 max 35711594 freq +47433070 +/- 46746070 delay 44899 +/- 45255
> ptp4l[12595.061]: rms 5558880 max 12292103 freq -13092285 +/- 6627317 delay -13499 +/- 6560
> ptp4l[12596.073]: rms 759533 max 1081638 freq +837063 +/- 802691 delay 711 +/- 979
> ptp4l[12597.085]: rms 60485 max 106800 freq +146706 +/- 263535 delay 145 +/- 263
> ptp4l[12598.096]: rms 16428 max 41896 freq -46707 +/- 34325 delay -40 +/- 34
> ptp4l[12599.108]: rms 3049 max 5356 freq +5337 +/- 1730 delay 7 +/- 2
> ptp4l[12600.120]: rms 284 max 381 freq +104 +/- 759 delay 2 +/- 1
> ptp4l[12601.131]: rms 42 max 119 freq -124 +/- 143 delay 2 +/- 0
> ptp4l[12602.144]: rms 11 max 25 freq +39 +/- 12 delay 3 +/- 0
> ptp4l[12603.156]: rms 2 max 4 freq +14 +/- 5 delay 3 +/- 0
> ptp4l[12604.167]: rms 1 max 3 freq +15 +/- 5 delay 2 +/- 0
> ptp4l[12605.179]: rms 1 max 4 freq +16 +/- 5 delay 2 +/- 1
> ptp4l[12606.191]: rms 1 max 3 freq +15 +/- 5 delay 3 +/- 0
With the fix:
> ptp4l[12834.266]: rms 27178238388098 max 30079328952737 freq +479164 +/- 1040869 delay 5 +/- 1
> ptp4l[12834.522]: port 1 (eno8703np0): minimum delay request interval 2^-8
> ptp4l[12835.315]: rms 86919 max 139746 freq +111289 +/- 539214 delay -35 +/- 28
> ptp4l[12836.376]: rms 5415 max 8884 freq +579 +/- 22798 delay 4 +/- 5
> ptp4l[12837.429]: rms 335 max 559 freq -305 +/- 842 delay 4 +/- 1
> ptp4l[12838.471]: rms 20 max 45 freq +79 +/- 33 delay 4 +/- 0
> ptp4l[12839.512]: rms 2 max 5 freq +44 +/- 8 delay 4 +/- 0
> ptp4l[12840.545]: rms 1 max 4 freq +46 +/- 8 delay 4 +/- 0
> ptp4l[12841.586]: rms 1 max 3 freq +46 +/- 7 delay 4 +/- 0
> ptp4l[12842.637]: rms 1 max 3 freq +46 +/- 7 delay 4 +/- 0
Fixes: 7cab44f1c35f ("ice: Introduce ETH56G PHY model for E825C products")
Signed-off-by: Maciek Machnikowski <maciej.machnikowski@intel.com>
Reviewed-by: Paul Menzel <pmenzel@molgen.mpg.de>
Reviewed-by: Aleksandr Loktionov <aleksandr.loktionov@intel.com>
Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Tested-by: Alexander Nowlin <alexander.nowlin@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
---
drivers/net/ethernet/intel/ice/ice_ptp.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/drivers/net/ethernet/intel/ice/ice_ptp.c b/drivers/net/ethernet/intel/ice/ice_ptp.c
index 8d302b500a39..a5fe05d70461 100644
--- a/drivers/net/ethernet/intel/ice/ice_ptp.c
+++ b/drivers/net/ethernet/intel/ice/ice_ptp.c
@@ -2086,8 +2086,9 @@ ice_ptp_settime64(struct ptp_clock_info *info, const struct timespec64 *ts)
/* Reenable periodic outputs */
ice_ptp_enable_all_perout(pf);
- /* Recalibrate and re-enable timestamp blocks for E822/E823 */
- if (hw->mac_type == ICE_MAC_GENERIC)
+ /* Recalibrate and re-enable timestamp blocks for E822/E823/E825-C */
+ if (hw->mac_type == ICE_MAC_GENERIC ||
+ hw->mac_type == ICE_MAC_GENERIC_3K_E825)
ice_ptp_restart_all_phy(pf);
exit:
if (err) {
--
2.47.1
prev parent reply other threads:[~2026-10-08 21:57 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-10-08 21:55 [PATCH net v2 00/15][pull request] ice: E82x: timestamp processing logic fixes Tony Nguyen
2026-10-08 21:55 ` [PATCH net v2 01/15] ice: fix removal of PTP timestamp tracker during reset Tony Nguyen
2026-10-08 21:55 ` [PATCH net v2 02/15] ice: use reference counting and SRCU for PTP port access Tony Nguyen
2026-10-08 21:56 ` [PATCH net v2 03/15] ice: fix PHY port restart serialization Tony Nguyen
2026-10-08 21:56 ` [PATCH net v2 04/15] ice: set in_use only after preparing Tx timestamp index Tony Nguyen
2026-10-08 21:56 ` [PATCH net v2 05/15] ice: call PTP link change only from link events Tony Nguyen
2026-10-08 21:56 ` [PATCH net v2 06/15] ice: E822: keep Tx timestamps disabled during offset calibration Tony Nguyen
2026-10-08 21:56 ` [PATCH net v2 07/15] ice: E822: cancel offset verification work during reset preparation Tony Nguyen
2026-10-08 21:56 ` [PATCH net v2 08/15] ice: E825: stop clearing PHY_REG_TX_OFFSET_READY Tony Nguyen
2026-10-08 21:56 ` [PATCH net v2 09/15] ice: E825: clear PHY_REG_TX_MEMORY_STATUS prior to soft reset Tony Nguyen
2026-10-08 21:56 ` [PATCH net v2 10/15] ice: E825: perform a soft reset when starting the PHY timer Tony Nguyen
2026-10-08 21:56 ` [PATCH net v2 11/15] ice: wait for in-flight Tx timestamps before flushing the tracker Tony Nguyen
2026-10-08 21:56 ` [PATCH net v2 12/15] ice: keep Tx timestamp slots tracked until completion or timeout Tony Nguyen
2026-10-08 21:56 ` [PATCH net v2 13/15] ice: skip reading Tx ready bitmap on ports with no timestamps Tony Nguyen
2026-10-08 21:56 ` [PATCH net v2 14/15] ice: don't clear in_use until HW clears ready bitmap Tony Nguyen
2026-10-08 21:56 ` Tony Nguyen [this message]
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