*** This bug is a duplicate of bug 1951861 ***
https://bugs.launchpad.net/bugs/1951861
https://lists.ubuntu.com/archives/kernel-team/2021-November/125883.html
BugLink: https://bugs.launchpad.net/bugs/1951861
[Impact]
e1000e devices stop working after s2idle resume.
[Fix]
Revert the offending patch series, which is to bring some minor power
saving.
[Test]
Vendor did extensive tests and didn't find any regression, and the power
consumption remains the same.
[Where problems could occur]
Maybe on some system the series can save some energy, so reverting will
cause some power consumption increase.
Kai-Heng Feng (3):
Revert "e1000e: Additional PHY power saving in S0ix"
Revert "e1000e: Add polling mechanism to indicate CSME DPG exit"
Revert "e1000e: Add handshake with the CSME to support S0ix"
drivers/net/ethernet/intel/e1000e/ich8lan.h | 3 -
drivers/net/ethernet/intel/e1000e/netdev.c | 358 +++++++++-----------
drivers/net/ethernet/intel/e1000e/regs.h | 1 -
3 files changed, 154 insertions(+), 208 deletions(-)
** This bug has been marked a duplicate of bug 1951861
Fix non-working e1000e device after resume
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https://bugs.launchpad.net/bugs/1949353
Title:
[SRU] Revert 'e1000e: add handshake with the Intel CSME to support
S0ix'
Status in OEM Priority Project:
New
Status in linux package in Ubuntu:
Incomplete
Bug description:
[SRU Justification]
https://patchwork.ozlabs.org/project/ubuntu-kernel/list/?series=258514
From the 5.13.0-1012-oem kernel we found NO Ethernet connecting after resume
from suspend, on 5.13.0-1010-oem we don't met this issue, so this is a
regression on I219 in lots of platforms.
And this blocked our OEM projects, could we revert the patches in short term?
When the firmware or the related patches are ready, we merge it again.
Oct 25 22:45:44 p15s-ThinkPad-P15s-Gen-2i kernel: e1000e 0000:00:1f.6
enp0s31f6: Detected Hardware Unit Hang:
TDH <3>
TDT <7>
next_to_use <7>
next_to_clean <3>
buffer_info[next_to_clean]:
time_stamp <ffff5cf8>
next_to_watch <3>
jiffies <ffff6090>
next_to_watch.status <0>
MAC Status <40080283>
PHY Status <796d>
PHY 1000BASE-T Status <3800>
PHY Extended Status <3000>
PCI Status <10>
[Impact]
These doesn't improve power consumption on some e1000e platforms.
[Fix]
I tried to revert these 3 patches on 5.13.0-1019.23, it works fine.
commit f65d71bdcb52e8d82dd0a3e71ae4359c0972fe3b
Author: Sasha Neftin <sasha.nef...@intel.com>
Date: Wed Aug 18 15:10:49 2021 +0800
e1000e: Additional PHY power saving in S0ix
BugLink: https://bugs.launchpad.net/bugs/1937252
After transferring the MAC-PHY interface to the SMBus set the PHY
to S0ix low power idle mode
commit c97933898708a37678ba1fc6f1f5704fbe92774c
Author: Sasha Neftin <sasha.nef...@intel.com>
Date: Wed Aug 18 15:10:48 2021 +0800
e1000e: Add polling mechanism to indicate CSME DPG exit
BugLink: https://bugs.launchpad.net/bugs/1937252
Per guidance from the CSME architecture team, it may take
up to 1 second for unconfiguring dynamic power gating mode.
Practically it can take more time. Wait up to 2.5 seconds to indicate
dynamic power gating exit from the S0ix configuration. Detect
scenarios that take more than 1 second but less than 2.5 seconds
will emit warning message.
commit 66069cb4ebaf0eccfdec934ebfd92d3fdb136adc
Author: Sasha Neftin <sasha.nef...@intel.com>
Date: Wed Aug 18 15:10:47 2021 +0800
e1000e: Add handshake with the CSME to support S0ix
BugLink: https://bugs.launchpad.net/bugs/1937252
On the corporate system, the driver will ask from the CSME
(manageability engine) to perform device settings are required
to allow S0ix residency.
This patch provides initial support.
[Test Case]
Do suspend and resume 10 times, it works fine.
for i in {1..10}; do
echo $i
rtcwake -m no -s 20 && echo mem > /sys/power/state
if dmesg | grep -q "Detected Hardware Unit Hang"; then
exit
fi
sleep 15
done
[Where problems could occur]
00:1f.6 Ethernet controller [0200]: Intel Corporation Ethernet Connection
(13) I219-LM [8086:15fb] (rev 20)
CPU: 11th Gen Intel(R) Core(TM) i7-1185G7 @ 3.00GHz
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