** Also affects: oem-priority
Importance: Undecided
Status: New
** Changed in: oem-priority
Importance: Undecided => Critical
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https://bugs.launchpad.net/bugs/1942160
Title:
PCIE LnkCtl ASPM not enabled under VMD mode for Alder Lake platforms
Status in HWE Next:
New
Status in OEM Priority Project:
New
Status in linux package in Ubuntu:
In Progress
Status in linux-oem-5.10 package in Ubuntu:
Invalid
Status in linux-oem-5.13 package in Ubuntu:
Invalid
Status in linux source package in Focal:
Invalid
Status in linux-oem-5.10 source package in Focal:
In Progress
Status in linux-oem-5.13 source package in Focal:
In Progress
Status in linux source package in Hirsute:
In Progress
Status in linux-oem-5.10 source package in Hirsute:
Invalid
Status in linux-oem-5.13 source package in Hirsute:
Invalid
Status in linux source package in Impish:
In Progress
Status in linux-oem-5.10 source package in Impish:
Invalid
Status in linux-oem-5.13 source package in Impish:
Invalid
Bug description:
[SRU Justification]
[Impact]
VMD PCI-E bridges on ADL-M/P/S use new device IDs and therefore not
covered by previous LTR reset fix in bug 1896598.
[Fix]
Additional entires to vmd_bridge_tbl in drivers/pci/quirks.c is
requierd:
* ADL-M: [8086:464d]
* ADL-P: [8086:51b0]
* ADL-S: [8086:7ab4]
[Test Case]
$ sudo lspci -vvn | grep -E '^(1|\s+LnkCtl:)'
...
10000:e0:1d.4 0604: 8086:7ab4 (rev 10) (prog-if 00 [Normal decode])
LnkCtl: ASPM L1 Enabled; RCB 64 bytes Disabled- CommClk+
10000:e1:00.0 0108: 8086:0975 (rev 03) (prog-if 02 [NVM Express])
LnkCtl: ASPM L1 Enabled; RCB 64 bytes Disabled- CommClk+
[Where problems could occur]
This will reset zeroed PCI_LTR_MAX_SNOOP_LAT and PCI_LTR_MAX_NOSNOOP_LAT
values to a fixed 3145728ns that is used on Windows. Devices might want
to set itself to a smaller value, but while this is not yet correctly
supported by VMD controller driver, so the device power consumption
might be little worse than ideal.
[Other Info]
VMD ASPM was first supported for Tiger Lake cpus, so all kernel versions
newer than 5.6 should have already the supporting function. This patch
targets Alder Lake cpus that are supported since 5.10-oem and on.
========== original bug report ==========
* ADL-M:
$ sudo lspci -vvn | grep -E '^(1|\s+LnkCtl:)'
10000:e0:06.0 PCI bridge [0604]: Intel Corporation Device [8086:464d] (rev 05)
Kernel driver in use: pcieport
10000:e1:00.0 Non-Volatile memory controller [0108]: Intel Corporation Device
[8086:f1aa] (rev 03)
Subsystem: Intel Corporation Device [8086:390f]
Kernel driver in use: nvme
Kernel modules: nvme
* ADL-P:
$ sudo lspci -vvn | grep -E '^(1|\s+LnkCtl:)'
10000:e0:1d.0 0604: 8086:51b0 (prog-if 00 [Normal decode])
LnkCtl: ASPM Disabled; RCB 64 bytes Disabled- CommClk+
10000:e1:00.0 0108: 8086:f1a8 (rev 03) (prog-if 02 [NVM Express])
LnkCtl: ASPM Disabled; RCB 64 bytes Disabled- CommClk+
* ADL-S:
$ sudo lspci -vvn | grep -E '^(1|\s+LnkCtl:)'
10000:e0:1d.4 0604: 8086:7ab4 (rev 10) (prog-if 00 [Normal decode])
LnkCtl: ASPM Disabled; RCB 64 bytes Disabled- CommClk+
10000:e1:00.0 0108: 8086:0975 (rev 03) (prog-if 02 [NVM Express])
LnkCtl: ASPM Disabled; RCB 64 bytes Disabled- CommClk+
See https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1889384,
https://bugs.launchpad.net/bugs/1896598.
---
ProblemType: Bug
ApportVersion: 2.20.11-0ubuntu27.18
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: gdm 1100 F.... pulseaudio
CasperMD5CheckResult: skip
Dependencies:
DistroRelease: Ubuntu 20.04
InstallationDate: Installed on 2021-04-06 (146 days ago)
InstallationMedia: Ubuntu 20.04.2 LTS "Focal Fossa" - Release amd64 (20210204)
Lsusb:
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 003: ID 8087:0032 Intel Corp.
Bus 001 Device 002: ID 062a:4c01 MosArt Semiconductor Corp. 2.4G INPUT DEVICE
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
MachineType: Intel Corporation Alder Lake Client Platform
Package: linux-firmware 1.187.16+staging.11 [origin: unknown]
PackageArchitecture: all
ProcFB: 0 i915drmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.13.0-9010-oem
root=UUID=e38f9e97-de55-4524-ba5b-a0ae4d5ea8a7 ro i915.force_probe=4680 quiet
splash vt.handoff=7
ProcVersionSignature: Ubuntu 5.13.0-9010.11+staging.9-oem 5.13.1
PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No
PulseAudio daemon running, or not running as session daemon.
RelatedPackageVersions:
linux-restricted-modules-5.13.0-9010-oem N/A
linux-backports-modules-5.13.0-9010-oem N/A
linux-firmware 1.187.16+staging.11
Tags: focal third-party-packages
Uname: Linux 5.13.0-9010-oem x86_64
UnreportableReason: This is not an official Ubuntu package. Please remove any
third party package and try again.
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: N/A
_MarkForUpload: True
dmi.bios.date: 04/26/2021
dmi.bios.vendor: Intel Corporation
dmi.bios.version: ADLSFWI1.R00.2181.A00.2104261003
dmi.board.asset.tag: Base Board Asset Tag
dmi.board.name: AlderLake-S ADP-S DDR5 UDIMM CRB
dmi.board.vendor: Intel Corporation
dmi.board.version: 2
dmi.chassis.asset.tag: Chassis Asset Tag
dmi.chassis.type: 3
dmi.chassis.vendor: Intel Corporation
dmi.chassis.version: 0.1
dmi.ec.firmware.release: 1.36
dmi.modalias:
dmi:bvnIntelCorporation:bvrADLSFWI1.R00.2181.A00.2104261003:bd04/26/2021:efr1.36:svnIntelCorporation:pnAlderLakeClientPlatform:pvr0.1:sku00001004002B0100:rvnIntelCorporation:rnAlderLake-SADP-SDDR5UDIMMCRB:rvr2:cvnIntelCorporation:ct3:cvr0.1:
dmi.product.family: Alder Lake Client System
dmi.product.name: Alder Lake Client Platform
dmi.product.sku: 00001004002B0100
dmi.product.version: 0.1
dmi.sys.vendor: Intel Corporation
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