Re: No network for SolidRun LX2160A Clearfog CX with kernel 6.12.113

[Oliver Smith <osmith@sysmocom.de>]

Hi Fabio,
Hi Vincent,

thank you for the replies!

On 10/30/26 15:37, Vincent Jardin wrote:
> Le 30/10/26 11:32, Fabio Estevam a écrit :
>> Run git bisect between 6.12.101 and 6.12.113 to find the exact commit
>> that caused the regression.

Sorry, but this is not a development machine and I don't have physical
access to it, only a serial console. I can run some checks, but building
multiple kernels for bisect and booting them sounds too risky and time
intense unfortunately.

On 10/30/26 15:37, Vincent Jardin wrote:
> then, on the board, check, analyze and provide the outputs if needed of:
> 
> uname -r; cat /proc/device-tree/model; echo
> ip -br link
> dmesg | grep -i -e fsl-mc -e dpaa2 -e dpmac -e dprc
> cat /sys/kernel/debug/devices_deferred
> ls /sys/bus/fsl-mc/devices/
> busybox devmem 0x08340008 32 # or equivalent for your Debian

Old kernel:
> root@lx2-1:~# uname -r; cat /proc/device-tree/model; echo
> 6.12.101+deb13-arm64
> SolidRun LX2160A Clearfog CX
> root@lx2-1:~# ip -br link
> lo               UNKNOWN        00:00:00:00:00:00 <LOOPBACK,UP,LOWER_UP>
> eth0             UP             d0:63:b4:03:b4:f7 <BROADCAST,MULTICAST,UP,LOWER_UP>
> br0              UP             52:a0:18:ae:7c:34 <BROADCAST,MULTICAST,UP,LOWER_UP>
> lxcbr0           DOWN           10:66:6a:00:00:00 <NO-CARRIER,BROADCAST,MULTICAST,UP>
> vethhEvvMx@if2   UP             fe:19:6b:c5:90:0e <BROADCAST,MULTICAST,UP,LOWER_UP>
> veth5HPqsX@if2   UP             fe:de:f1:c5:ae:3a <BROADCAST,MULTICAST,UP,LOWER_UP>
> vethFfnWAR@if2   UP             fe:ec:61:dc:5a:aa <BROADCAST,MULTICAST,UP,LOWER_UP>
> root@lx2-1:~# dmesg | grep -i -e fsl-mc -e dpaa2 -e dpmac -e dprc
> root@lx2-1:~# cat /sys/kernel/debug/devices_deferred
> root@lx2-1:~# ls /sys/bus/fsl-mc/devices/
> dpbp.0	  dpcon.12  dpcon.18  dpcon.23	dpcon.29  dpcon.6  dpio.10  dpio.2  dpio.8    dpmac.5  dpmcp.10  dpmcp.16  dpmcp.21  dpmcp.27  dpmcp.32  dpmcp.6  dprtc.0
> dpbp.1	  dpcon.13  dpcon.19  dpcon.24	dpcon.3   dpcon.7  dpio.11  dpio.3  dpio.9    dpmac.6  dpmcp.11  dpmcp.17  dpmcp.22  dpmcp.28  dpmcp.33  dpmcp.7  dpseci.0
> dpcon.0   dpcon.14  dpcon.2   dpcon.25	dpcon.30  dpcon.8  dpio.12  dpio.4  dpmac.10  dpmac.7  dpmcp.12  dpmcp.18  dpmcp.23  dpmcp.29  dpmcp.34  dpmcp.8
> dpcon.1   dpcon.15  dpcon.20  dpcon.26	dpcon.31  dpcon.9  dpio.13  dpio.5  dpmac.17  dpmac.8  dpmcp.13  dpmcp.19  dpmcp.24  dpmcp.3   dpmcp.35  dpmcp.9
> dpcon.10  dpcon.16  dpcon.21  dpcon.27	dpcon.4   dpio.0   dpio.14  dpio.6  dpmac.3   dpmac.9  dpmcp.14  dpmcp.2   dpmcp.25  dpmcp.30  dpmcp.4	 dpni.0
> dpcon.11  dpcon.17  dpcon.22  dpcon.28	dpcon.5   dpio.1   dpio.15  dpio.7  dpmac.4   dpmcp.1  dpmcp.15  dpmcp.20  dpmcp.26  dpmcp.31  dpmcp.5	 dprc.1
> root@lx2-1:~# busybox devmem 0x08340008 32
> 0x0000003F

New kernel:
> root@lx2-1:~# uname -r; cat /proc/device-tree/model; echo
> 6.12.113+deb13-arm64
> SolidRun LX2160A Clearfog CX
> root@lx2-1:~# ip -br link
> lo               UNKNOWN        00:00:00:00:00:00 <LOOPBACK,UP,LOWER_UP>
> br0              UP             52:a0:18:ae:7c:34 <BROADCAST,MULTICAST,UP,LOWER_UP>
> lxcbr0           DOWN           10:66:6a:00:00:00 <NO-CARRIER,BROADCAST,MULTICAST,UP>
> vethXFQUqu@if2   UP             fe:0a:7b:88:52:cd <BROADCAST,MULTICAST,UP,LOWER_UP>
> vethUG8N9y@if2   UP             fe:ff:eb:09:16:a5 <BROADCAST,MULTICAST,UP,LOWER_UP>
> vethoesNCY@if2   UP             fe:8e:29:91:43:6b <BROADCAST,MULTICAST,UP,LOWER_UP>
> root@lx2-1:~# dmesg | grep -i -e fsl-mc -e dpaa2 -e dpmac -e dprc
> [    0.008101] fsl-mc MSI: msi-controller@6020000 domain created
> [    0.107175] fsl_mc_bus 80c000000.fsl-mc: fsl-mc: MC boot completed with error 0x3f
> [    0.114747] fsl_mc_bus 80c000000.fsl-mc: probe with driver fsl_mc_bus failed with error -22
> root@lx2-1:~# cat /sys/kernel/debug/devices_deferred
> 8000000.crypto
> root@lx2-1:~# ls /sys/bus/fsl-mc/devices/
> root@lx2-1:~# busybox devmem 0x08340008 32
> 0x0000003F

On 10/30/26 15:37, Vincent Jardin wrote:
> 
>  From U-Boot, before it boots Linux:
> 
> md.l 0x08340008 1
> printenv mcinitcmd bootcmd
> 
> 0x08340008 is the General Status Register (GSR) of the MC

uboot:
> => md.l 0x08340008 1
> 08340008: 00000001                               ....
> => printenv mcinitcmd bootcmd
> mcinitcmd=mmc dev 1; mmc read 0x80a00000 0x5000 0x1200;mmc read 0x80e00000 0x7000 0x800;env exists secureboot && mmc read 0x80640000 0x3200 0x20 && mmc read 0x80680000 0x3400 0x20 && esbc_validate 0x80640000 && esbc_validate 0x80680000 ;fsl_mc start mc 0x80a00000 0x80e00000
> bootcmd=mmc dev 1; env exists mcinitcmd && mmcinfo; mmc read 0x80d00000 0x6800 0x800; env exists mcinitcmd && env exists secureboot  && mmc read 0x806C0000 0x3600 0x20 && esbc_validate 0x806C0000;env exists mcinitcmd && fsl_mc lazyapply dpl 0x80d00000;run distro_bootcmd;run sd2_bootcmd;env exists secureboot && esbc_halt;
> =>

Best regards,
Oliver

-- 
- Oliver Smith <osmith@sysmocom.de>            https://www.sysmocom.de/
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