How to nfs boot imx8 qm static Mode

[hhami_2040]

Hello
I have Got A Ixzora Cariier board and Apalis Imx.8qm Module.
I’m trying to boot a system using NFS/TFTP Server(Static Mode).
My OS host system is Ubuntu 20.04.
I could load kernel (zimage) and dtb using Static configuration and boot kernel but nfs root-file-system mount is failing:
There is the result of log

スポイラ

## Executing script at 83100000
Using ethernet@5b040000 device
TFTP from server 10.42.0.1; our IP address is 10.42.0.80
Filename 'hdmitxfw.bin'.
Load address: 0x9c000000
Loading: #####################  0 Bytes
	 3.3 MiB/s
done
Bytes transferred = 106496 (1a000 hex)
Loading hdp firmware from 0x000000009c000000 offset 0x0000000000002000
Loading hdp firmware Complete
Loading DeviceTree: imx8qm-apalis-ixora-v1.2.dtb
Using ethernet@5b040000 device
TFTP from server 10.42.0.1; our IP address is 10.42.0.80
Filename 'imx8qm-apalis-ixora-v1.2.dtb'.
Load address: 0x83000000
Loading: ##################################  0 Bytes
	 9 MiB/s
done
Bytes transferred = 170028 (2982c hex)
Using ethernet@5b040000 device
TFTP from server 10.42.0.1; our IP address is 10.42.0.80
Filename 'overlays.txt'.
Load address: 0x87000000
Loading: #  0 Bytes
	 7.8 KiB/s
done
Bytes transferred = 43 (2b hex)
Applying Overlay: apalis-imx8_hdmi_overlay.dtbo
Using ethernet@5b040000 device
TFTP from server 10.42.0.1; our IP address is 10.42.0.80
Filename 'overlays/apalis-imx8_hdmi_overlay.dtbo'.
Load address: 0x87000000
Loading: #  0 Bytes
	 1 MiB/s
done
Bytes transferred = 2177 (881 hex)
Using ethernet@5b040000 device
TFTP from server 10.42.0.1; our IP address is 10.42.0.80
Filename 'Image.gz'.
Load address: 0x87000000
Loading: #################################################################
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	 ################################################################  0 Bytes
	 13 MiB/s
done
Bytes transferred = 10642316 (a2638c hex)
Uncompressed size: 25700864 = 0x1882A00
Bootargs: pci=nomsi root=/dev/nfs nfsroot=10.42.0.1:/srv/fs
## Flattened Device Tree blob at 83000000
   Booting using the fdt blob at 0x83000000
   Loading Device Tree to 00000000fd601000, end 00000000fd64dfff ... OK

Starting kernel ...

[    0.000000] Booting Linux on physical CPU 0x0000000000 [0x410fd034]
[    0.000000] Linux version 5.4.193-5.7.0-devel+git.f78299297185 (oe-user@oe-host) (gcc version 9.3.0 (GCC)) #1 SMP PREEMPT Mon Jul 11 14:42:03 UTC 2022
[    0.000000] Machine model: Toradex Apalis iMX8QM V1.1 on Apalis Ixora V1.2 Carrier Board
[    0.000000] efi: Getting EFI parameters from FDT:
.
.
.
[    4.068640] pci 0000:00:00.0: reg 0x10: [mem 0x00000000-0x00ffffff]
[    4.074947] pci 0000:00:00.0: reg 0x38: [mem 0x00000000-0x00ffffff pref]
[    4.081730] pci 0000:00:00.0: supports D1 D2
[    4.086029] pci 0000:00:00.0: PME# supported from D0 D1 D2 D3hot
[    4.098747] pci 0000:01:00.0: [1b4b:2b42] type 00 class 0x020000
[    4.104866] pci 0000:01:00.0: reg 0x10: [mem 0x00000000-0x000fffff 64bit pref]
[    4.112156] pci 0000:01:00.0: reg 0x18: [mem 0x00000000-0x000fffff 64bit pref]
[    4.119724] pci 0000:01:00.0: supports D1 D2
[    4.124032] pci 0000:01:00.0: PME# supported from D0 D1 D3hot D3cold
[    4.124138] hub 3-1:1.0: USB hub found
[    4.130529] pci 0000:01:00.0: 2.000 Gb/s available PCIe bandwidth, limited by 2.5 GT/s x1 link at 0000:00:00.0 (capable of 4.000 Gb/s with 5 GT/s x1 link)
[    4.148049] hub 3-1:1.0: 3 ports detected
[    4.168338] pci 0000:00:00.0: BAR 0: assigned [mem 0x70000000-0x70ffffff]
[    4.175415] pci 0000:00:00.0: BAR 6: assigned [mem 0x71000000-0x71ffffff pref]
[    4.182667] pci 0000:00:00.0: BAR 15: assigned [mem 0x72000000-0x721fffff 64bit pref]
[    4.190533] pci 0000:01:00.0: BAR 0: assigned [mem 0x72000000-0x720fffff 64bit pref]
[    4.198325] pci 0000:01:00.0: BAR 2: assigned [mem 0x72100000-0x721fffff 64bit pref]
[    4.206128] pci 0000:00:00.0: PCI bridge to [bus 01-ff]
[    4.211373] pci 0000:00:00.0:   bridge window [mem 0x72000000-0x721fffff 64bit pref]
[    4.219497] pcieport 0000:00:00.0: PME: Signaling with IRQ 567
[    4.440242] usb 3-1.3: new low-speed USB device number 3 using ci_hdrc
[    4.462298] imx6q-pcie 5f000000.pcie: Phy link never came up
[    4.468037] imx6q-pcie 5f000000.pcie: failed to initialize host
[    4.474015] imx6q-pcie 5f000000.pcie: unable to add pcie port.
[    4.560308] input: PixArt USB Optical Mouse as /devices/platform/bus@5b000000/5b0e0000.usb/ci_hdrc.1/usb3/3-1/3-1.3/3-1.3:1.0/0003:093A:2510.0001/input/input1
[    4.575030] hid-generic 0003:093A:2510.0001: input,hidraw0: USB HID v1.11 Mouse [PixArt USB Optical Mouse] on usb-ci_hdrc.1-1.3/input0
[   33.764258] VDD_EXT_RGMII (LDO1): disabling
[   33.768481] pcie_switch: disabling
[   33.771897] 3v3_vmmc: disabling
[   33.775059] can1_supply: disabling
[   33.778480] can2_supply: disabling

[  103.396617] VFS: Unable to mount root fs via NFS, trying floppy.
[  103.403076] VFS: Cannot open root device "nfs" or unknown-block(2,0 error -6
[  103.410367] Please append a correct "root=" boot option; here are the available partitions:
[  103.418999] 0100           65536 ram0 
[  103.419000]  (driver?)
[  103.425142] 0101           65536 ram1 
[  103.425142]  (driver?)
[  103.431257] 0102           65536 ram2 
[  103.431258]  (driver?)
[  103.437376] 0103           65536 ram3 
[  103.437376]  (driver?)
[  103.443497] 0104           65536 ram4 
[  103.443497]  (driver?)
[  103.449610] 0105           65536 ram5 
[  103.449611]  (driver?)
[  103.455716] 0106           65536 ram6 
[  103.455716]  (driver?)
[  103.461833] 0107           65536 ram7 
[  103.461834]  (driver?)
[  103.467950] 0108           65536 ram8 
[  103.467951]  (driver?)
[  103.474070] 0109           65536 ram9 
[  103.474071]  (driver?)
[  103.480196] 010a           65536 ram10 
[  103.480196]  (driver?)
[  103.486397] 010b           65536 ram11 
[  103.486398]  (driver?)
[  103.492604] 010c           65536 ram12 
[  103.492605]  (driver?)
[  103.498806] 010d           65536 ram13 
[  103.498807]  (driver?)
[  103.505018] 010e           65536 ram14 
[  103.505019]  (driver?)
[  103.511220] 010f           65536 ram15 
[  103.511221]  (driver?)
[  103.517439] b300        15392768 mmcblk0 
[  103.517440]  driver: mmcblk
[  103.524257]   b301           49152 mmcblk0p1 594a73e7-01
[  103.524258] 
[  103.531067]   b302        15339520 mmcblk0p2 594a73e7-02
[  103.531068] 
[  103.537876] Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(2,0)
[  103.546148] CPU: 5 PID: 1 Comm: swapper/0 Not tainted 5.4.193-5.7.0-devel+git.f78299297185 #1
[  103.554675] Hardware name: Toradex Apalis iMX8QM V1.1 on Apalis Ixora V1.2 Carrier Board (DT)
[  103.563206] Call trace:
[  103.565662]  dump_backtrace+0x0/0x168
[  103.569322]  show_stack+0x14/0x20
[  103.572643]  dump_stack+0xb4/0x110
[  103.576045]  panic+0x158/0x324
[  103.579105]  mount_block_root+0x1d0/0x284
[  103.583114]  mount_root+0x124/0x158
[  103.586598]  prepare_namespace+0x15c/0x1c0
[  103.590689]  kernel_init_freeable+0x21c/0x248
[  103.595043]  kernel_init+0x10/0x100
[  103.598540]  ret_from_fork+0x10/0x1c
[  103.602120] SMP: stopping secondary CPUs
[  103.606053] Kernel Offset: disabled
[  103.609546] CPU features: 0x10002,2100600c
[  103.613643] Memory Limit: none
[  103.616700] ---[ end Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(2,0) ]---

i wrote a script bootloader to boot kernel zImage and DTB as bellow:

スポイラ

setenv my_bootcmd_dhcp 'echo Boot NFS static. . .;  
	setenv devtype tftp; 
	printenv devtype;
	 if test "${devtype}" = "tftp";
	 	setenv ipaddr "10.42.0.80";
	 	setenv serverip "10.42.0.1";
	 	setenv rootpath "srv/fs";
	 	printenv rootpath;
		setenv fdt_file imx8qm-apalis-ixora-v1.2.dtb
		source ${scriptaddr};
	  then
	  	 echo "finish . . .***";
	  fi'


run my_bootcmd_dhcp

My exports file,

スポイラ

/srv/fs *(no_root_squash,no_subtree_check,rw)

after that
sudo /etc/init.d/nfs-kernel-server restart
sudo mount core-image-minimal-apalis-imx8.ext4 /srv/fs

sudo exportfs -r 
 sudo exportfs -u

and ftp config

$ sudo gedit /etc/xinetd.d/tftp
service tftp
{
	protocol = udp
	port = 69
	socket_type = dgram
	wait = yes
	user = nobody
	server = /usr/sbin/in.tftpd
	server_args = /tftpboot
	disable = no
}

and run:

$ sudo mkdir /tftp
$ sudo chmod -R 777 /srv/tftp
$ sudo /etc/init.d/xinetd restart

 Any idea, how we can boot NFS static the I.mx8 apalis device rootfs?
Best regards,

[Zhiming_Liu]

Hi @hhami_2040 

Please refer below guide:

https://developer.technexion.com/docs/using-an-nfs-root-filesystem

https://variwiki.com/index.php?title=Yocto_Setup_TFTP/NFS&release=RELEASE_HARDKNOTT_V1.0_DART-MX8M-M...