[EHL] Integrated TSN controller (stmmac) driver support

[[e-mail]]

1. Feature Overview: Enable Integrated TSN controller (stmac) driver in Ubuntu

2. Hardware: Elkhart Lake

3. Upstream acceptance: Commit IDs see below

4. External Links:
IoTG EHL RDC#:606615

5. Ubuntu target: Ubuntu 21.10 (and Ubuntu 20.04 IoTG)

Commit ID List (Kernel merged)
ab1c637cc6d8 stmmac: intel: Fix kernel crash due to wrong error path (5.7)
29e0c2f39f98 stmmac: intel: Place object in the Makefile according to the order (5.8)
ccacb703b0f8 stmmac: intel: Fix indentation to put on one line affected code (5.8)
d5383b037664 stmmac: intel: Eliminate useless conditions and variables (5.8)
52c1f7948454 stmmac: intel: Convert to use pci_alloc_irq_vectors() API (5.8)
e578f043ffcf stmmac: intel: Remove unnecessary loop for PCI BARs (5.8)
09f012e64e4b stmmac: intel: Fix clock handling on error and remove paths (5.8)
801eb0501824 stmmac: intel: Fix kernel crash due to wrong error path (5.8)
VLAN support: c89f44ff10fd net: stmmac: Add support for VLAN promiscuous mode (5.8)
b9663b7ca6ff net: stmmac: Enable SERDES power up/down sequence (5.7)
d63439f575dc net: stmmac: add EHL 2.5Gbps PCI info and PCI ID (5.7)
67c08ac4140a net: stmmac: add EHL PSE0 & PSE1 1Gbps PCI info and PCI ID (5.7)
58da0cfa6cf1 net: stmmac: create dwmac-intel.c to contain all Intel platform (5.7)
VLAN support: ed64639bc1e0 net: stmmac: Add support for VLAN Rx filtering (5.7)
3e07df430c2b net: stmmac: Get rid of custom STMMAC_DEVICE() macro (5.7)
909c1dde67c4 net: stmmac: update pci platform data to use phy_interface (5.6)
2f633d5820e4 net: stmmac: xgmac: fix missing IFF_MULTICAST checki in dwxgmac2_set_filter (5.6)
2ba31cd93784 net: stmmac: fix missing IFF_MULTICAST check in dwmac4_set_filter (5.6)
VLAN support: 907a076881f1 net: stmmac: xgmac: fix incorrect XGMAC_VLAN_TAG register writing (5.6)
VLAN support: 9eeeb3c9de4e net: stmmac: fix incorrect GMAC_VLAN_TAG register writting in GMAC4+ (5.6)
c593642c8be0 treewide: Use sizeof_field() macro (5.5)
8e5debed3901 net: stmmac: Use rtnl_lock/unlock on netif_set_real_num_rx_queues() call (5.10)
785ff20bce2d stmmac: intel: Fix kernel panic on pci probe (5.10)
388e201d41fa net: stmmac: Modify configuration method of EEE timers (5.9)
b4c5f83ae3f3 stmmac: intel: Adding ref clock 1us tic for LPI cntr (5.10)
ac322f86b56c net: stmmac: Fix clock handling on remove path (5.9_
VLAN support: e0f9956a3862 net: stmmac: Add option for VLAN filter fail queue enable (5.10)
d0ea5cbdc286 drivers/net/ethernet: clean up mis-targeted comments (5.10)
7241c5a69747 net: stmmac: removed enabling eee in EEE set callback (5.9)
aa042f60e496 net: stmmac: Add support to Ethtool get/set ring parameters (5.10)
9f19306d1666 net: stmmac: use netif_tx_start|stop_all_queues() function (5.10)
686cff3d7022 net: stmmac: Fix incorrect location to set real_num_rx|tx_queues (5.10)
0366f7e06a6b net: stmmac: add ethtool support for get/set channels (5.10)
9efc9b2b04c7 net: stmmac: Add dwmac-intel-plat for GBE driver (5.10)
TSN support: 5a5586112b92 net: stmmac: support FPE link partner hand-shaking procedure (5.13)
TSN support: 341f67e424e5 net: stmmac: Add hardware supported cross-timestamp (5.13)
TSN support: 76da35dc99af stmmac: intel: Add PSE and PCH PTP clock source selection (5.13)
TSN support: 9f298959191b net: stmmac: Add EST errors into ethtool statistic (5.13)
TSN support: e49aa315cb01 net: stmmac: EST interrupts handling and error reporting (5.13)
VLAN support: 0e039f5cf86c net: stmmac: add RX frame steering based on VLAN priority in tc flower (5.13)
VLAN support: bd0f670e7931 net: stmmac: restructure tc implementation for RX VLAN Priority steering (5.13)
db2f2842e6f5 net: stmmac: add per-queue TX & RX coalesce ethtool support (5.13)
TSN support: 3600be5f58c1 net: stmmac: add timestamp correction to rid CDC sync error (5.13)
SGMII support: 7310fe538ea5 stmmac: intel: add pcs-xpcs for Intel mGbE controller (5.13)
SGMII support: c62808e8105f net: stmmac: ensure phydev is attached to phylink for C37 AN (5.13)
SGMII support: e5e5b771f684 net: stmmac: make in-band AN mode parsing is supported for non-DT (5.13)
TSN support: 8eb37ab7cc04 stmmac: intel: Fixes clock registration error seen for multiple interfaces (5.12)
VLAN support: 9a7b3950c7e1 net: stmmac: Fix VLAN filter delete timeout issue in Intel mGBE SGMII (5.12)
879c348c35bb net: stmmac: fix incorrect DMA channel intr enable setting of EQoS v4.10 (5.12)
fa706dce2f2d stmmac: intel: Fix mdio bus registration issue for TGL-H/ADL-S (5.12)
TSN support: 24877687b375 net: stmmac: fix CBS idleslope and sendslope calculation (5.12)
20e07e2c3cf3 net: stmmac: Add PCI bus info to ethtool driver query output (5.12)
f317e2ea8c88 net: stmmac: set TxQ mode back to DCB after disabling CBS (5.11)
7cfc4486e7ea stmmac: intel: Configure EHL PSE0 GbE and PSE1 GbE to 32 bits DMA addressing (5.11)
88af9bd4efbd stmmac: intel: Add ADL-S 1Gbps PCI IDs (5.12)
8450e23f142f stmmac: intel: Add PCI IDs for TGL-H platform (5.11)
523437d7b5ba net: stmmac: allow stmmac to probe for C45 PHY devices (5.11)
bff6f1db91e3 stmmac: intel: change all EHL/TGL to auto detect phy addr (5.11)
be1c7eae8c7d net: stmmac: Enable EEE HW LPI timer with auto SW/HW switching (5.11)
d7f576dc9836 net: stmmac: fix memory leak during driver probe (5.13)
TSN support: f4da56529da6 net: stmmac: Add support for external trigger timestamping (5.13)
XDP support: 132c32ee5bc0 net: stmmac: Add TX via XDP zero-copy socket (5.13)
XDP support: bba2556efad6 net: stmmac: Enable RX via AF_XDP zero-copy (5.13)
XDP support: bba71cac680f net: stmmac: Refactor __stmmac_xdp_run_prog for XDP ZC (5.13)
XDP support: de0b90e52a11 net: stmmac: rearrange RX and TX desc init into per-queue basis (5.13)
XDP support: da5ec7f22a0f net: stmmac: refactor stmmac_init_rx_buffers for stmmac_reinit_rx_buffers (5.13)
XDP support: 80f573c995fc net: stmmac: introduce dma_recycle_rx_skbufs for stmmac_reinit_rx_buffers (5.13)
XDP support: 4298255f26fa net: stmmac: rearrange RX buffer allocation and free functions (5.13)
017d6250ad71 stmmac: intel: Enable SERDES PHY rx clk for PSE (5.13)
3036ec035c4d stmmac: intel: Drop duplicate ID in the list of PCI device IDs (5.13)
XDP support: 8b278a5b69a2 net: stmmac: Add support for XDP_REDIRECT action (5.13)
XDP support: be8b38a722e6 net: stmmac: Add support for XDP_TX action (5.13)
XDP support: 5fabb01207a2 net: stmmac: Add initial XDP support (5.13)
XDP support: d96febedfde2 net: stmmac: arrange Tx tail pointer update to stmmac_flush_tx_descriptors (5.13)
XDP support: d08d32d10193 net: stmmac: make SPH enable/disable to be configurable (5.13)
XDP support: 8deec94c6040 net: stmmac: set IRQ affinity hint for multi MSI vectors (5.13)
2237778d8c21 net: stmmac: remove unnecessary pci_enable_msi() call (5.13)
8accc467758e stmmac: intel: use managed PCI function on probe and resume (5.13)
b494ba5a3cf8 net: stmmac: enable MTL ECC Error Address Status Over-ride by default (5.13)
TSN support: 1c137d4777b5 stmmac: intel: add cross time-stamping freq difference adjustment (5.13)
TSN support: 63c173ff7aa3 net: stmmac: Fix kernel panic due to NULL pointer dereference of fpe_cfg (5.13)
6ccf12ae111e net: stmmac: use interrupt mode INTM=1 for multi-MSI (5.13)
b42446b9b37b stmmac: intel: add support for multi-vector msi and msi-x (5.13)
8532f613bc78 net: stmmac: introduce MSI Interrupt routines for mac, safety, RX & TX (5.13)
29e6573c61aa net: stmmac: make stmmac_interrupt() function more friendly to MSI (5.13)
7e1c520c0d20 net: stmmac: introduce DMA interrupt status masking per traffic direction (5.13)
d137c70d0e7a net: phy: marvell10g: Add PHY loopback support (5.13)
0ef25ed104ac net: phy: add genphy_c45_loopback (5.13)
d82c6c1aaccd net: phylink: Fix phylink_err() function name error in phylink_major_config (5.12)
SGMII support: ab39385021d1 net: phylink: make phylink_parse_mode() support non-DT platform (5.13)
SGMII support: b97b5331b8ab net: pcs: add C37 SGMII AN support for intel mGbE controller (5.13)
SGMII support: 07a4bc51fc73 net: pcs: rearrange C73 functions to prepare for C37 support later (5.13)
b618c3270249 net: phy: mscc: fix excluded_middle.cocci warnings (5.11)
043d2be2a782 net: phy: leds: Deduplicate link LED trigger registration (5.11)

X-HWE-Bug: Bug #1939511

-----------------------------------------------------

EHL TSN reference (RDC #616446): https://drive.google.com/file/d/1VaElyNp-fXDLWe8WF9Dx1-hiPRmTEokN/view

[apoorv (sangal)]

Update Patch list to be backported:
(5.11)
676b7ec67d79 stmmac: intel: Enable HW descriptor prefetch by default
96874c619c20 net: stmmac: Add HW descriptor prefetch setting for DWMAC Core 5.20 onwards
5e6038b88a57 net: stmmac: fix TSO and TBS feature enabling during driver open
17cb00704c21 stmmac: intel: set TSO/TBS TX Queues default settings
622d13694b5f xdp: fix xdp_return_frame() kernel BUG throw for page_pool memory model

Patches still under discussion:
[net,V2,1/1] net: phy: fix invalid phy id when probe using C22
[net-next,v2,1/2] net: stmmac: enable 2.5Gbps link speed
[net-next,v2,2/2] net: pcs: configure xpcs 2.5G speed mode

Features yet to be enabled:
Wake-on-LAN support - Advanced Power Management (APM)
Magic Packet support: Expected timeline

Packet HW timestamping support via AF_XDP socket - TSN specific
Packet Transmit Time support via AF_XDP socket - TSN specific

[Hsuan-Yu Lin (shanelin)]

The following patches have been landed in Ubuntu-intel-5.11.0-1009.9 but with different SHA.
We can skip them.

mainline ubuntu
8eb37ab7cc04 0ed5ee99d2b7 stmmac: intel: Fixes clock registration error seen for multiple interfaces
9a7b3950c7e1 3caea6cc6b79 net: stmmac: Fix VLAN filter delete timeout issue in Intel mGBE SGMII
879c348c35bb c61e714ff1c8 net: stmmac: fix incorrect DMA channel intr enable setting of EQoS v4.10
24877687b375 725d7f7a4e39 net: stmmac: fix CBS idleslope and sendslope calculation
d82c6c1aaccd 4f3320e619b4 net: phylink: Fix phylink_err() function name error in phylink_major_config
5e6038b88a57 e5f16595557e net: stmmac: fix TSO and TBS feature enabling during driver open
622d13694b5f 286fb6686ca7 xdp: fix xdp_return_frame() kernel BUG throw for page_pool memory model

[Hsuan-Yu Lin (shanelin)]

Continue #2, and the following patches have been landed in Ubuntu-intel-5.11.0-1009.9 with the same SHA.

ab1c637cc6d8 stmmac: intel: Fix kernel crash due to wrong error path
29e0c2f39f98 stmmac: intel: Place object in the Makefile according to the order
ccacb703b0f8 stmmac: intel: Fix indentation to put on one line affected code
d5383b037664 stmmac: intel: Eliminate useless conditions and variables
52c1f7948454 stmmac: intel: Convert to use pci_alloc_irq_vectors() API
e578f043ffcf stmmac: intel: Remove unnecessary loop for PCI BARs
09f012e64e4b stmmac: intel: Fix clock handling on error and remove paths
801eb0501824 stmmac: intel: Fix kernel crash due to wrong error path
c89f44ff10fd net: stmmac: Add support for VLAN promiscuous mode
b9663b7ca6ff net: stmmac: Enable SERDES power up/down sequence
d63439f575dc net: stmmac: add EHL 2.5Gbps PCI info and PCI ID
67c08ac4140a net: stmmac: add EHL PSE0 & PSE1 1Gbps PCI info and PCI ID
58da0cfa6cf1 net: stmmac: create dwmac-intel.c to contain all Intel platform
ed64639bc1e0 net: stmmac: Add support for VLAN Rx filtering
3e07df430c2b net: stmmac: Get rid of custom STMMAC_DEVICE() macro
909c1dde67c4 net: stmmac: update pci platform data to use phy_interface
2f633d5820e4 net: stmmac: xgmac: fix missing IFF_MULTICAST checki in dwxgmac2_set_filter
2ba31cd93784 net: stmmac: fix missing IFF_MULTICAST check in dwmac4_set_filter
907a076881f1 net: stmmac: xgmac: fix incorrect XGMAC_VLAN_TAG register writting
9eeeb3c9de4e net: stmmac: fix incorrect GMAC_VLAN_TAG register writting in GMAC4+
c593642c8be0 treewide: Use sizeof_field() macro
8e5debed3901 net: stmmac: Use rtnl_lock/unlock on netif_set_real_num_rx_queues() call
785ff20bce2d stmmac: intel: Fix kernel panic on pci probe
388e201d41fa net: stmmac: Modify configuration method of EEE timers
b4c5f83ae3f3 stmmac: intel: Adding ref clock 1us tic for LPI cntr
ac322f86b56c net: stmmac: Fix clock handling on remove path
e0f9956a3862 net: stmmac: Add option for VLAN filter fail queue enable
d0ea5cbdc286 drivers/net/ethernet: clean up mis-targeted comments
7241c5a69747 net: stmmac: removed enabling eee in EEE set callback
aa042f60e496 net: stmmac: Add support to Ethtool get/set ring parameters
9f19306d1666 net: stmmac: use netif_tx_start|stop_all_queues() function
686cff3d7022 net: stmmac: Fix incorrect location to set real_num_rx|tx_queues
0366f7e06a6b net: stmmac: add ethtool support for get/set channels
9efc9b2b04c7 net: stmmac: Add dwmac-intel-plat for GBE driver
f317e2ea8c88 net: stmmac: set TxQ mode back to DCB after disabling CBS
7cfc4486e7ea stmmac: intel: Configure EHL PSE0 GbE and PSE1 GbE to 32 bits DMA addressing
8450e23f142f stmmac: intel: Add PCI IDs for TGL-H platform
523437d7b5ba net: stmmac: allow stmmac to probe for C45 PHY devices
bff6f1db91e3 stmmac: intel: change all EHL/TGL to auto detect phy addr
be1c7eae8c7d net: stmmac: Enable EEE HW LPI timer with auto SW/HW switching
b618c3270249 net: phy: mscc: fix excluded_middle.cocci warnings
043d2be2a782 net: phy: leds: Deduplicate link LED trigger registration

[Hsuan-Yu Lin (shanelin)]

Hi @pragyan and @apoorv,

I have checked that the 99 patches[1] are all landed in the mainline kernel (ff1176468d36 Linux 5.14-rc3).

Can I expect to use the mainline kernel to make the TSN controller work (5.14-rc3 or above)?
So that I can use it as a reference kernel.

Thanks!

---
[1] After comparing all the patches mentioned in the bug description and comment #1, except the still under discussion patches.

[Sachin Mokashi (sachinmokashi)]

Hi @shanelin,

Yes, you can use 5.14-rc3 has reference kernel.

Regarding the patches under discussion:
[net,V2,1/1] net: phy: fix invalid phy id when probe using C22
[net-next,v2,1/2] net: stmmac: enable 2.5Gbps link speed
[net-next,v2,2/2] net: pcs: configure xpcs 2.5G speed mode

These 3 have been accepted in mainline kernel. Please proceed to backport them as well

[Sachin Mokashi (sachinmokashi)]

Regarding features that were yet to be enabled as mentioned in #1:
Wake-on-LAN support - Advanced Power Management (APM)
Magic Packet support: Expected timeline

The following patches have already landed upstream, please proceed to backport them:

622d13694b5f xdp: fix xdp_return_frame() kernel BUG throw for page_pool memory model
08041a9af98c net: phy: marvell10g: enable WoL for 88X3310 and 88E2110
6b28a86d6c0b net: stmmac: Terminate FPE workqueue in suspend
1dd53a61488d stmmac: intel: set PCI_D3hot in suspend
945beb755633 stmmac: intel: Enable PHY WOL option in EHL
5a9b876e9d76 net: stmmac: option to enable PHY WOL with PMT enabled
3c3ea630e87c stmmac: intel: fix wrong kernel-doc
fb9349c4163e stmmac: intel: move definitions to dwmac-intel header file
52e597d3e2e6 net: stmmac: Fix potential integer overflow
3e6dc7b65025 net: stmmac: Fix unused values warnings
1f7096f0fdb2 net: stmmac: Fix mixed enum type warning
46682cb86a37 net: stmmac: enable Intel mGbE 2.5Gbps link speed
597a68ce3216 net: stmmac: split xPCS setup from mdio register
ab00f3e051e8 net: stmmac: fix issue where clk is being unprepared twice
5ac712dcdfef net: stmmac: enable platform specific safety features
e80fe71b3ffe net: stmmac: Add callbacks for DWC xpcs Energy Efficient Ethernet
4c7a94286ef7 net: stmmac: Clear receive all(RA) bit when promiscuous mode is off
db7c691d7f4d net: stmmac: cleared __FPE_REMOVING bit in stmmac_fpe_start_wq()

#MaxLinear GPY PHY driver
7d901a1e878a net: phy: add Maxlinear GPY115/21x/24x driver
8b72b301b442 net: phy: add API to read 802.3-c45 IDs

[Hsuan-Yu Lin (shanelin)]

Hi @sachinmokashi,

Could you share the TSN verification steps to know if the backport I did is correct?

[Sachin Mokashi (sachinmokashi)]

Hi @shanelin,

Intel has shared the Testcases document "Intel_IOTG_Testcases_v1.pdf" with Canonical folks (<email address hidden>, <email address hidden>) which have TSN tests.

Can you please contact them for the testcases. Thanks.

[Hsuan-Yu Lin (shanelin)]

Hi @sachinmokashi,

I got the document "Intel_IOTG_Testcases_v1.pdf", thanks!

Regarding comment #5 you mentioned:
[net,V2,1/1] net: phy: fix invalid phy id when probe using C22
[net-next,v2,1/2] net: stmmac: enable 2.5Gbps link speed
[net-next,v2,2/2] net: pcs: configure xpcs 2.5G speed mode

I can not found these patches in the mainline kernel, neither net, and net-next.

Could you please provide the commit ID?

Thanks!

[Hsuan-Yu Lin (shanelin)]

I have backported the following patches, but not submit yet. (Please refer to the attachment)

ab1c637cc6d8 stmmac: intel: Fix kernel crash due to wrong error path (5.7)
...
...
622d13694b5f xdp: fix xdp_return_frame() kernel BUG throw for page_pool memory model

[Hsuan-Yu Lin (shanelin)]

Hi @sachinmokashi,

After backporting the patches (the WoL has not been backported yet), I can see the stmmac related initialization dmesg. But it seems probed fail.

[ 3.175073] intel-eth-pci: probe of 0000:00:1e.4 failed with error -110

I have also tried the mainline kernel v5.14-rc3 [1] as I mentioned in comment #4, and got the same error message.

Could you please help to take a look at the dmesg and give the advice if I need to adjust the jumper or BIOS settings or any other additional steps?

Thank you!

---
[1] https://kernel.ubuntu.com/~kernel-ppa/mainline/v5.14-rc3/

[Sachin Mokashi (sachinmokashi)]

Hi @shanelin,

Regarding your comment #9, please ignore these patches as they were just interim

[net,V2,1/1] net: phy: fix invalid phy id when probe using C22
[net-next,v2,1/2] net: stmmac: enable 2.5Gbps link speed
[net-next,v2,2/2] net: pcs: configure xpcs 2.5G speed mode

[Sachin Mokashi (sachinmokashi)]

Hi @shanelin,

For the comment #11, Please go through the attached Document released by Intel for its customers. You can go through the BIOS and TSN tabs of the sheet to make the necessary BIOS settings/ TSN configuration.

For the TSN tests, you can refer to the RDC document mentioned in this sheet:
TSN Ref SW Get Started Guide (ID# 616446)

[Anthony Wong (anthonywong)]

We do not have access to ID#616446 yet, have reached out to Pragyan for help.

[Anthony Wong (anthonywong)]

Got the #616446 document and have shared with Shane.

[Hsuan-Yu Lin (shanelin)]

I have filed a new public bug for TSN enablement. (bug 1939511)

For the other WoL/magic packet/MaxLinear GPY PHY driver patches (comment #6), I will file another public bug later.

[Anthony Wong (anthonywong)]

Test kernel for TSN (without WoL, etc): https://people.canonical.com/~jesse/linux-intel/tsn01/

[Hsuan-Yu Lin (shanelin)]

Hi @sachinmokashi,

I got a new EHL hardware (rev 201).

One of the ethernet ports can work. (On the Top-Left port)
I tried to check the other two ports by "ifconfig -a", dmesg, and lspci [1], but they were still unavailable.

Is this behavior expected? (Only one ethernet port works)

---
lspci:

00:1d.1 Ethernet controller [0200]: Intel Corporation Device [8086:4ba0] (rev 11) (prog-if 18)
        Subsystem: Intel Corporation Device [8086:7270]
        Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx+
        Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
        Latency: 0
        Interrupt: pin A routed to IRQ 128
        Region 0: Memory at 6001300000 (64-bit, non-prefetchable) [size=256K]
        Capabilities: [80] Power Management version 3
                Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA PME(D0+,D1-,D2-,D3hot+,D3cold-)
                Status: D0 NoSoftRst+ PME-Enable- DSel=0 DScale=0 PME-
        Capabilities: [90] Vendor Specific Information: Len=14 <?>
        Capabilities: [d0] MSI: Enable+ Count=32/32 Maskable+ 64bit+
                Address: 00000000fee00418 Data: 0000
                Masking: c3ff0000 Pending: 00000000
        Kernel driver in use: intel-eth-pci
        Kernel modules: dwmac_intel

[Sachin Mokashi (sachinmokashi)]

Hi @shanelin,

Are all the patches as mentioned in comment #16 already backported? There would be dependencies on MaxLinear GPY PHY driver patches.

Also, for the port that works, are you able to get the IP and connect to network? This would help Doug to run Checkbox test suite

[Hsuan-Yu Lin (shanelin)]

Hi @sachinmokashi,

Yes, the port that works can get the IP and connect to the network.

Is there any difference between rev 200 and 201 for the ethernet/PHY circuit?
Because the rev 200 hardware can not probe any ethernet interfaces, even I use the same kernel.

Thanks!

[apoorv (sangal)]

Hi @Shanelin,
There is no difference w.r.t ethernet/PHY circuit.
You can access the schematics from document id#607610

[Hsuan-Yu Lin (shanelin)]

Successfully backported all the patches mentioned in the description, comments #1, #2, and #6

Please refer to the source code and changelog for more details.

Source code: https://git.launchpad.net/~shanelin/ubuntu/+source/linux-intel/+git/focal/log/?h=tsn02

Changelog: https://git.launchpad.net/~shanelin/ubuntu/+source/linux-intel/+git/focal/tree/debian.intel/changelog?h=tsn02

[Hsuan-Yu Lin (shanelin)]

Test kernel for comment #22 (include all patches)

https://people.canonical.com/~shane/linux-intel/tsn02/

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Anthony Wong (anthonywong)]

From our testing on the rev201 board, the kernel in #23 does not work better:
1. The two non-functional ethernet ports are still non-functional
2. The ethernet port that used to work now can't get any IP

Our earlier question on reference kernel still remains. We tried 5.14-rc3 as suggested but we still only get one port working (can get IP).

[Anthony Wong (anthonywong)]

From Chao Qin:
After confirm with TSN feature owner, it needs to rework the board to enable the third network interface.