荔枝派Zero(全志V3S) tftp下载 kernel 和 nfs 挂载文件系统

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前言

传输文件每次都插拔 SD 卡太麻烦了,还是使用网线传输文件比较快,借此机会讲述一下 通过 tftp下载 kernel 和 nfs 挂载文件系统


一、U-Boot 适配 Ethernet

我使用的 uboot 是 2017.01 版本的,U-Boot 2017 已经支持了 sun8i-emac 的驱动,只需要在编译时选上并且修改 dts 就行。

1、配置 U-Boot

①、进入u-boot源码目录,执行

 make menuconfig

②、Device Drivers -> Network device support 按照下图进行配置
荔枝派Zero(全志V3S) tftp下载 kernel 和 nfs 挂载文件系统

2、修改 dts 文件

①、修改 sun8i-v3s-licheepi-zero.dts

find ./ -name sun8i-v3s-licheepi-zero.dts
vi ./arch/arm/dts/sun8i-v3s-licheepi-zero.dts

荔枝派Zero(全志V3S) tftp下载 kernel 和 nfs 挂载文件系统
这里说明一下:下面的是 git 的对比功能,+ 就是表示比原来增加的部分,也就是我们需要编写的部分。(可以根据 + 前面和后面的部分准确的定位)

sun8i-v3s-licheepi-zero.dts:

diff --git a/arch/arm/dts/sun8i-v3s-licheepi-zero.dts b/arch/arm/dts/sun8i-v3s-licheepi-zero.dts
index 3d9168c..b8b9fc3 100644
--- a/arch/arm/dts/sun8i-v3s-licheepi-zero.dts
+++ b/arch/arm/dts/sun8i-v3s-licheepi-zero.dts
@@ -49,6 +49,7 @@
        compatible = "licheepi,licheepi-zero", "allwinner,sun8i-v3s";
 
        aliases {
+               ethernet0 = &emac;
                serial0 = &uart0;
        };
 
@@ -81,3 +82,14 @@
        usb0_id_det-gpio = <&pio 5 6 GPIO_ACTIVE_HIGH>;
        status = "okay";
 };
+
+&emac {
+       phy = <&phy0>;
+       phy-mode = "mii";
+       allwinner,use-internal-phy;
+       allwinner,leds-active-low;
+       status = "okay";
+       phy0: ethernet-phy@0 {
+               reg = <1>;
+       };
+};

②、修改 sun8i-v3s.dtsi

find ./ -name sun8i-v3s.dtsi
vi ./arch/arm/dts/sun8i-v3s.dtsi

荔枝派Zero(全志V3S) tftp下载 kernel 和 nfs 挂载文件系统
sun8i-v3s.dtsi:

diff --git a/arch/arm/dts/sun8i-v3s.dtsi b/arch/arm/dts/sun8i-v3s.dtsi
index ebefc0f..cb81dd5 100644
--- a/arch/arm/dts/sun8i-v3s.dtsi
+++ b/arch/arm/dts/sun8i-v3s.dtsi
@@ -96,6 +96,11 @@
                #size-cells = <1>;
                ranges;
 
+               syscon: syscon@01c00000 {
+                       compatible = "allwinner,sun8i-h3-syscon","syscon";
+                       reg = <0x01c00000 0x34>;
+               };
+
                mmc0: mmc@01c0f000 {
                        compatible = "allwinner,sun7i-a20-mmc";
                        reg = <0x01c0f000 0x1000>;
@@ -208,6 +213,17 @@
                        interrupt-controller;
                        #interrupt-cells = <3>;
 
+                       emac_rgmii_pins: emac0@0 {
+                               allwinner,pins = "PD0", "PD1", "PD2", "PD3",
+                                               "PD4", "PD5", "PD7",
+                                               "PD8", "PD9", "PD10",
+                                               "PD12", "PD13", "PD15",
+                                               "PD16", "PD17";
+                               allwinner,function = "emac";
+                               allwinner,drive = <SUN4I_PINCTRL_40_MA>;
+                               allwinner,pull = <SUN4I_PINCTRL_NO_PULL>;
+                       };
+
                        uart0_pins_a: uart0@0 {
                                pins = "PB8", "PB9";
                                function = "uart0";
@@ -270,6 +286,20 @@
                        status = "disabled";
                };
 
+               emac: ethernet@1c30000 {
+                       compatible = "allwinner,sun8i-h3-emac";
+                       reg = <0x01c30000 0x104>, <0x01c00030 0x4>;
+                       reg-names = "emac", "syscon";
+                       interrupts = <GIC_SPI 82 IRQ_TYPE_LEVEL_HIGH>;
+                       resets = <&ccu RST_BUS_EMAC>, <&ccu RST_BUS_EPHY>;
+                       reset-names = "ahb", "ephy";
+                       clocks = <&ccu CLK_BUS_EMAC>, <&ccu CLK_BUS_EPHY>;
+                       clock-names = "ahb", "ephy";
+                       #address-cells = <1>;
+                       #size-cells = <0>;
+                       status = "disabled";
+               };
+
                gic: interrupt-controller@01c81000 {
                        compatible = "arm,cortex-a7-gic", "arm,cortex-a15-gic";
                        reg = <0x01c81000 0x1000>,

3、编译

time make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- 2>&1 | tee build.log
ls

荔枝派Zero(全志V3S) tftp下载 kernel 和 nfs 挂载文件系统

4、烧写到 SD 卡

sudo dd if=u-boot-sunxi-with-spl.bin of=/dev/sdb bs=1024 seek=8

荔枝派Zero(全志V3S) tftp下载 kernel 和 nfs 挂载文件系统

5、测试

<1>、查看启动打印信息

有下面红框的部分说明配置成功。
荔枝派Zero(全志V3S) tftp下载 kernel 和 nfs 挂载文件系统

<2>、ping 测试

在ping网络之前我们需要先设置 ip
①、设置主机端(ubuntu)网络信息

可以参考之前写的一个文章在 ubuntu 配置两个网卡,一个用来上外网,一个用来连接板子 i.mx287学习笔记-ubuntu虚拟机网络配置同时连接WIFI上外网和连接以太网与i.mx287开发板通信

荔枝派Zero(全志V3S) tftp下载 kernel 和 nfs 挂载文件系统
②、设置开发板端网络信息

setenv ipaddr 192.168.25.20
setenv gatewayip 192.168.25.1
setenv netmask 255.255.255.0
setenv serverip 192.168.25.25
saveenv

③、在单板端 ping 主机

ping 192.168.25.25

荔枝派Zero(全志V3S) tftp下载 kernel 和 nfs 挂载文件系统
失败了,看到当前电脑防火墙都处于开启状态,应该是这个原因,关闭电脑端防火墙再次测试
荔枝派Zero(全志V3S) tftp下载 kernel 和 nfs 挂载文件系统
荔枝派Zero(全志V3S) tftp下载 kernel 和 nfs 挂载文件系统
成功了

二、Kernel 适配 Ethernet

我使用的 kernel 是 5.2.0 版本

1、配置 kernel

<1>、配置以太网网络
在 linux 根目录下

make menuconfig

Device Drivers -> Network device support -> Ethernet driver support
按照如下配置:
荔枝派Zero(全志V3S) tftp下载 kernel 和 nfs 挂载文件系统
荔枝派Zero(全志V3S) tftp下载 kernel 和 nfs 挂载文件系统
因为我们后面还需要通过nfs挂载文件系统,所以我们还需要继续配置

<2>、配置NFS文件系统相关网络
Networking support -> Networking options
按照如下配置:
荔枝派Zero(全志V3S) tftp下载 kernel 和 nfs 挂载文件系统
<3>、配置 NFS 文件系统
File systems -> Network File Systems
按照如下配置:
荔枝派Zero(全志V3S) tftp下载 kernel 和 nfs 挂载文件系统

2、修改 dts 文件

5.2 版本的 dock 版本的设备树中已经添加了。

3、编译

make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- -j4

得到 zImage 和 sun8i-v3s-licheepi-zero-dock.dtb
荔枝派Zero(全志V3S) tftp下载 kernel 和 nfs 挂载文件系统

4、拷贝到 SD 卡

sudo cp ./arch/arm/boot/zImage ./arch/arm/boot/dts/sun8i-v3s-licheepi-zero-dock.dtb /media/Gnep/KERNEL/

荔枝派Zero(全志V3S) tftp下载 kernel 和 nfs 挂载文件系统

5、测试

<1>、启动网络接口,并查看网络信息

ifconfig eth0 up
ifconfig

荔枝派Zero(全志V3S) tftp下载 kernel 和 nfs 挂载文件系统

<2>、ping 测试

①、在单板端 ping 主机

ifconfig eth0 192.168.25.20
ping 192.168.25.25

荔枝派Zero(全志V3S) tftp下载 kernel 和 nfs 挂载文件系统
②、在主机端 ping 单板

ping 192.168.25.20

荔枝派Zero(全志V3S) tftp下载 kernel 和 nfs 挂载文件系统
可以看到,互 ping 成功

三、通过 tftp下载 zImage 和 dts,通过 nfs 挂载文件系统

搭建 NFS 服务器以及 TFTP 服务器的方法可以参考这个:SSH 服务器、NFS 服务器、TFTP 服务器详解及测试
首先确保 sun8i-v3s-licheepi-zero-dock.dtb 和 zImage拷贝到了 /tftpboot 目录下,/nfsroot 下为 rootfs.tar 解压缩后的文件
荔枝派Zero(全志V3S) tftp下载 kernel 和 nfs 挂载文件系统

1、设置 bootcmd

setenv  bootcmd 'setenv bootm_boot_mode sec;setenv ipaddr 192.168.25.20;setenv serverip 192.168.25.25;tftp 41000000 zImage;tftp 41800000 sun8i-v3s-licheepi-zero-dock.dtb;bootz 0x41000000 - 0x41800000'

2、设置 bootargs

setenv bootargs root=/dev/nfs nfsroot=192.168.25.25:/nfsroot,nfsvers=4 rw ip=192.168.25.20:192.168.25.25:192.168.25.1:255.255.255.0::eth0:off init=/linuxrc console=ttyS0,115200

3、保存

saveenv

四、挂载效果

1、从 tftp 下载 kernel 及通过 nfs 挂载 rootfs

一个启动的完整打印信息

U-Boot SPL 2017.01-rc2-00057-g32ab1804cd-dirty (Apr 29 2023 - 10:11:46)
DRAM: 64 MiB
Trying to boot from MMC1

U-Boot 2017.01-rc2-00057-g32ab1804cd-dirty (Apr 29 2023 - 10:11:46 +0800) Allwinner Technology

CPU:   Allwinner V3s (SUN8I 1681)
Model: Lichee Pi Zero
DRAM:  64 MiB
MMC:   SUNXI SD/MMC: 0
Setting up a 800x480 lcd console (overscan 0x0)
dotclock: 33000kHz = 33000kHz: (1 * 3MHz * 66) / 6
In:    serial@01c28000
Out:   serial@01c28000
Err:   serial@01c28000


U-Boot 2017.01-rc2-00057-g32ab1804cd-dirty (Apr 29 2023 - 10:11:46 +0800) Allwinner Technology

CPU:   Allwinner V3s (SUN8I 1681)
Model: Lichee Pi Zero
DRAM:  64 MiB
MMC:   SUNXI SD/MMC: 0
Setting up a 800x480 lcd console (overscan 0x0)
dotclock: 33000kHz = 33000kHz: (1 * 3MHz * 66) / 6
In:    serial@01c28000
Out:   serial@01c28000 Err: serial@01c28000 Net: phy interface0 eth0: ethernet@1c30000 starting USB... No controllers found Hit any key to stop autoboot: 0 Using ethernet@1c30000 device TFTP from server 192.168.25.25; our IP address is 192.168.25.20
Filename 'zImage'.
Load address: 0x41000000
Loading: #################################################################
         #################################################################
         #################################################################
         #################################################################
         #####################################################
         654.3 KiB/s
done
Bytes transferred = 4580840 (45e5e8 hex)
Using ethernet@1c30000 device
TFTP from server 192.168.25.25; our IP address is 192.168.25.20
Filename 'sun8i-v3s-licheepi-zero-dock.dtb'.
Load address: 0x41800000
Loading: #
         1.4 MiB/s
done
Bytes transferred = 12100 (2f44 hex)
## Flattened Device Tree blob at 41800000
   Booting using the fdt blob at 0x41800000
   Loading Device Tree to 42dfa000, end 42dfff43 ... OK

Starting kernel ...

[    0.000000] Booting Linux on physical CPU 0x0
[    0.000000] Linux version 5.2.0-licheepi-zero+ (Gnep@lpvm) (gcc version 6.3.1 20170404 (Linaro GCC 6.3-2017.05)) #2 SMP Fri Apr 28 18:59:07 CST 2023
[    0.000000] CPU: ARMv7 Processor [410fc075] revision 5 (ARMv7), cr=10c5387d
[    0.000000] CPU: div instructions available: patching division code
[    0.000000] CPU: PIPT / VIPT nonaliasing data cache, VIPT aliasing instruction cache
[    0.000000] OF: fdt: Machine model: Lichee Pi Zero with Dock
[    0.000000] Memory policy: Data cache writealloc
[    0.000000] percpu: Embedded 16 pages/cpu s34508 r8192 d22836 u65536
[    0.000000] Built 1 zonelists, mobility grouping on.  Total pages: 15883
[    0.000000] Kernel command line: root=/dev/nfs rw nfsroot=192.168.25.25:/nfsroot ip=192.168.25.20:192.168.25.25:192.168.0.1:255.255.255.0::eth0:off init=/linuxrc console=ttyS0,115200
[    0.000000] Dentry cache hash table entries: 8192 (order: 3, 32768 bytes, linear)
[    0.000000] Inode-cache hash table entries: 4096 (order: 2, 16384 bytes, linear)
[    0.000000] mem auto-init: stack:off, heap alloc:off, heap free:off
[    0.000000] Memory: 52500K/64036K available (7168K kernel code, 308K rwdata, 1824K rodata, 1024K init, 265K bss, 11536K reserved, 0K cma-reserved, 0K highmem)
[    0.000000] SLUB: HWalign=64, Order=0-3, MinObjects=0, CPUs=1, Nodes=1
[    0.000000] rcu: Hierarchical RCU implementation.
[    0.000000] rcu:     RCU event tracing is enabled.
[    0.000000] rcu:     RCU restricting CPUs from NR_CPUS=8 to nr_cpu_ids=1.
[    0.000000] rcu: RCU calculated value of scheduler-enlistment delay is 10 jiffies.
[    0.000000] rcu: Adjusting geometry for rcu_fanout_leaf=16, nr_cpu_ids=1
[    0.000000] NR_IRQS: 16, nr_irqs: 16, preallocated irqs: 16
[    0.000000] random: get_random_bytes called from start_kernel+0x300/0x48c with crng_init=0
[    0.000000] arch_timer: cp15 timer(s) running at 24.00MHz (virt).
[    0.000000] clocksource: arch_sys_counter: mask: 0xffffffffffffff max_cycles: 0x588fe9dc0, max_idle_ns: 440795202592 ns
[    0.000009] sched_clock: 56 bits at 24MHz, resolution 41ns, wraps every 4398046511097ns
[    0.000022] Switching to timer-based delay loop, resolution 41ns
[    0.000212] clocksource: timer: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 79635851949 ns
[    0.000461] Console: colour dummy device 80x30
[    0.000520] Calibrating delay loop (skipped), value calculated using timer frequency.. 48.00 BogoMIPS (lpj=240000)
[    0.000537] pid_max: default: 32768 minimum: 301
[    0.000702] Mount-cache hash table entries: 1024 (order: 0, 4096 bytes, linear)
[    0.000720] Mountpoint-cache hash table entries: 1024 (order: 0, 4096 bytes, linear)
[    0.001557] CPU: Testing write buffer coherency: ok
[    0.002103] /cpus/cpu@0 missing clock-frequency property
[    0.002130] CPU0: thread -1, cpu 0, socket 0, mpidr 80000000
[    0.002909] Setting up static identity map for 0x40100000 - 0x40100060
[    0.003123] rcu: Hierarchical SRCU implementation.
[    0.003661] smp: Bringing up secondary CPUs ...
[    0.003680] smp: Brought up 1 node, 1 CPU
[    0.003691] SMP: Total of 1 processors activated (48.00 BogoMIPS).
[    0.003699] CPU: All CPU(s) started in SVC mode.
[    0.004769] devtmpfs: initialized
[    0.008308] VFP support v0.3: implementor 41 architecture 2 part 30 variant 7 rev 5
[    0.008649] clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 19112604462750000 ns
[    0.008682] futex hash table entries: 256 (order: 2, 16384 bytes, linear)
[    0.008938] pinctrl core: initialized pinctrl subsystem
[    0.010084] NET: Registered protocol family 16
[    0.010633] DMA: preallocated 256 KiB pool for atomic coherent allocations
[    0.011923] hw-breakpoint: found 5 (+1 reserved) breakpoint and 4 watchpoint registers.
[    0.011942] hw-breakpoint: maximum watchpoint size is 8 bytes.
[    0.037193] SCSI subsystem initialized
[    0.037489] usbcore: registered new interface driver usbfs
[    0.037548] usbcore: registered new interface driver hub
[    0.037653] usbcore: registered new device driver usb
[    0.037892] mc: Linux media interface: v0.10
[    0.037937] videodev: Linux video capture interface: v2.00
[    0.038161] Advanced Linux Sound Architecture Driver Initialized.
[    0.039524] clocksource: Switched to clocksource arch_sys_counter
[    0.052538] NET: Registered protocol family 2
[    0.053376] tcp_listen_portaddr_hash hash table entries: 512 (order: 0, 6144 bytes, linear)
[    0.053419] TCP established hash table entries: 1024 (order: 0, 4096 bytes, linear)
[    0.053443] TCP bind hash table entries: 1024 (order: 1, 8192 bytes, linear)
[    0.053466] TCP: Hash tables configured (established 1024 bind 1024)
[    0.053627] UDP hash table entries: 256 (order: 1, 8192 bytes, linear)
[    0.053680] UDP-Lite hash table entries: 256 (order: 1, 8192 bytes, linear)
[    0.053982] NET: Registered protocol family 1
[    0.054958] RPC: Registered named UNIX socket transport module.
[    0.054982] RPC: Registered udp transport module.
[    0.054989] RPC: Registered tcp transport module.
[    0.054994] RPC: Registered tcp NFSv4.1 backchannel transport module.
[    0.056788] Initialise system trusted keyrings
[    0.057239] workingset: timestamp_bits=30 max_order=14 bucket_order=0
[    0.065782] NFS: Registering the id_resolver key type
[    0.065846] Key type id_resolver registered
[    0.065854] Key type id_legacy registered
[    0.065875] nfs4filelayout_init: NFSv4 File Layout Driver Registering...
[    0.095649] Key type asymmetric registered
[    0.095670] Asymmetric key parser 'x509' registered
[    0.095778] Block layer SCSI generic (bsg) driver version 0.4 loaded (major 250)
[    0.095791] io scheduler mq-deadline registered
[    0.095798] io scheduler kyber registered
[    0.096744] sun4i-usb-phy 1c19400.phy: Couldn't request ID GPIO
[    0.100714] sun8i-v3s-pinctrl 1c20800.pinctrl: initialized sunXi PIO driver
[    0.173113] Serial: 8250/16550 driver, 8 ports, IRQ sharing disabled
[    0.175639] sun8i-v3s-pinctrl 1c20800.pinctrl: 1c20800.pinctrl supply vcc-pb not found, using dummy regulator
[    0.176811] printk: console [ttyS0] disabled
[    0.197122] 1c28000.serial: ttyS0 at MMIO 0x1c28000 (irq = 36, base_baud = 1500000) is a U6_16550A
[    0.752469] printk: console [ttyS0] enabled
[    0.781975] libphy: Fixed MDIO Bus: probed
[    0.786651] dwmac-sun8i 1c30000.ethernet: PTP uses main clock
[    0.792553] dwmac-sun8i 1c30000.ethernet: No regulator found
[    0.798765] dwmac-sun8i 1c30000.ethernet: Current syscon value is not the default 148000 (expect 58000)
[    0.808256] dwmac-sun8i 1c30000.ethernet: No HW DMA feature register supported
[    0.815498] dwmac-sun8i 1c30000.ethernet: RX Checksum Offload Engine supported
[    0.822727] dwmac-sun8i 1c30000.ethernet: COE Type 2
[    0.827686] dwmac-sun8i 1c30000.ethernet: TX Checksum insertion supported
[    0.834477] dwmac-sun8i 1c30000.ethernet: Normal descriptors
[    0.840139] dwmac-sun8i 1c30000.ethernet: Chain mode enabled
[    0.846038] libphy: stmmac: probed
[    0.850227] dwmac-sun8i 1c30000.ethernet: Found internal PHY node
[    0.856507] libphy: mdio_mux: probed
[    0.860194] dwmac-sun8i 1c30000.ethernet: Switch mux to internal PHY
[    0.866551] dwmac-sun8i 1c30000.ethernet: Powering internal PHY
[    0.873692] libphy: mdio_mux: probed
[    0.877618] ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
[    0.884264] ehci-platform: EHCI generic platform driver
[    0.889864] ehci-platform 1c1a000.usb: EHCI Host Controller
[    0.895482] ehci-platform 1c1a000.usb: new USB bus registered, assigned bus number 1
[    0.903473] ehci-platform 1c1a000.usb: irq 26, io mem 0x01c1a000
[    0.939522] ehci-platform 1c1a000.usb: USB 2.0 started, EHCI 1.00
[    0.946731] hub 1-0:1.0: USB hub found
[    0.950688] hub 1-0:1.0: 1 port detected
[    0.955319] ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver
[    0.961673] ohci-platform: OHCI generic platform driver
[    0.967232] ohci-platform 1c1a400.usb: Generic Platform OHCI controller
[    0.973983] ohci-platform 1c1a400.usb: new USB bus registered, assigned bus number 2
[    0.981968] ohci-platform 1c1a400.usb: irq 27, io mem 0x01c1a400
[    1.054635] hub 2-0:1.0: USB hub found
[    1.058476] hub 2-0:1.0: 1 port detected
[    1.065805] usbcore: registered new interface driver usb-storage
[    1.073126] input: 1c22800.lradc as /devices/platform/soc/1c22800.lradc/input/input0
[    1.082466] sun6i-rtc 1c20400.rtc: registered as rtc0
[    1.087531] sun6i-rtc 1c20400.rtc: RTC enabled
[    1.092257] i2c /dev entries driver
[    1.097240] input: ns2009_ts as /devices/platform/soc/1c2ac00.i2c/i2c-0/0-0048/input/input1
[    1.107098] sunxi-wdt 1c20ca0.watchdog: Watchdog enabled (timeout=16 sec, nowayout=0)
[    1.115841] sun8i-v3s-pinctrl 1c20800.pinctrl: 1c20800.pinctrl supply vcc-pf not found, using dummy regulator
[    1.152381] sunxi-mmc 1c0f000.mmc: initialized, max. request size: 16384 KB
[    1.159694] sun8i-v3s-pinctrl 1c20800.pinctrl: 1c20800.pinctrl supply vcc-pg not found, using dummy regulator
[    1.194701] sunxi-mmc 1c10000.mmc: initialized, max. request size: 16384 KB
[    1.202863] usbcore: registered new interface driver usbhid
[    1.208440] usbhid: USB HID core driver
[    1.214579] sun4i-codec 1c22c00.codec: ASoC: codec-analog@01c23000 not registered
[    1.222222] sun4i-codec 1c22c00.codec: Failed to register our card
[    1.229758] Initializing XFRM netlink socket
[    1.234073] NET: Registered protocol family 17
[    1.239133] Key type dns_resolver registered
[    1.243720] Registering SWP/SWPB emulation handler
[    1.249908] Loading compiled-in X.509 certificates
[    1.260419] simple-framebuffer 43e89000.framebuffer: framebuffer at 0x43e89000, 0x177000 bytes, mapped to 0x(ptrval)
[    1.271064] simple-framebuffer 43e89000.framebuffer: format=x8r8g8b8, mode=800x480x32, linelength=3200
[    1.287363] Console: switching to colour frame buffer device 100x30
[    1.299918] simple-framebuffer 43e89000.framebuffer: fb0: simplefb registered!
[    1.308771] usb_phy_generic usb_phy_generic.0.auto: usb_phy_generic.0.auto supply vcc not found, using dummy regulator
[    1.320289] musb-hdrc musb-hdrc.1.auto: MUSB HDRC host driver
[    1.326056] musb-hdrc musb-hdrc.1.auto: new USB bus registered, assigned bus number 3
[    1.335557] hub 3-0:1.0: USB hub found
[    1.339632] hub 3-0:1.0: 1 port detected
[    1.343629] mmc0: host does not support reading read-only switch, assuming write-enable
[    1.354261] debugfs: Directory '1c22c00.codec' with parent 'V3s Audio Codec' already present!
[    1.362947] sun4i-codec 1c22c00.codec: ASoC: Failed to create component debugfs directory: -17
[    1.373146] sun4i-codec 1c22c00.codec: Codec <-> 1c22c00.codec mapping ok
[    1.380873] mmc0: new high speed SDHC card at address 1234
[    1.388193] sun6i-rtc 1c20400.rtc: setting system clock to 1970-01-01T06:46:28 UTC (24388)
[    1.398686] mmcblk0: mmc0:1234 SA08G 7.21 GiB 
[    1.404611] dwmac-sun8i 1c30000.ethernet eth0: PHY [0.1:01] driver [Generic PHY]
[    1.413624] dwmac-sun8i 1c30000.ethernet eth0: No Safety Features support found
[    1.421018] dwmac-sun8i 1c30000.ethernet eth0: No MAC Management Counters available
[    1.428671] dwmac-sun8i 1c30000.ethernet eth0: PTP not supported by HW
[    1.435250] dwmac-sun8i 1c30000.ethernet eth0: configuring for phy/mii link mode
[    1.444023]  mmcblk0: p1 p2
[    5.609819] dwmac-sun8i 1c30000.ethernet eth0: Link is Up - 100Mbps/Full - flow control rx/tx
[    5.669538] IP-Config: Complete:
[    5.672778]      device=eth0, hwaddr=02:00:f4:0d:32:47, ipaddr=192.168.25.20, mask=255.255.255.0, gw=192.168.0.1
[    5.682972]      host=192.168.25.20, domain=, nis-domain=(none)
[    5.688886]      bootserver=192.168.25.25, rootserver=192.168.25.25, rootpath=
[    5.696337] IP-Config: Gateway not on directly connected network
[    5.702515] vcc5v0: disabling
[    5.705487] ALSA device list:
[    5.708453]   #0: V3s Audio Codec
[    9.166191] random: fast init done
[  103.536444] VFS: Unable to mount root fs via NFS, trying floppy.
[  103.543316] VFS: Cannot open root device "nfs" or unknown-block(2,0): error -6
[  103.550663] Please append a correct "root=" boot option; here are the available partitions:
[  103.559021] b300         7563264 mmcblk0 
[  103.559025]  driver: mmcblk
[  103.565852]   b301           32768 mmcblk0p1 49bfda8b-01
[  103.565854] 
[  103.572664]   b302         7529472 mmcblk0p2 49bfda8b-02
[  103.572665] 
[  103.579470] Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(2,0)
[  103.587729] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 5.2.0-licheepi-zero+ #2
[  103.594852] Hardware name: Allwinner sun8i Family
[  103.599588] [<c010ed14>] (unwind_backtrace) from [<c010b72c>] (show_stack+0x10/0x14)
[  103.607329] [<c010b72c>] (show_stack) from [<c07374f0>] (dump_stack+0x84/0x98)
[  103.614550] [<c07374f0>] (dump_stack) from [<c011dddc>] (panic+0x110/0x2fc)
[  103.621512] [<c011dddc>] (panic) from [<c0a0136c>] (mount_block_root+0x1a0/0x288)
[  103.628991] [<c0a0136c>] (mount_block_root) from [<c0a01598>] (mount_root+0x144/0x160)
[  103.636902] [<c0a01598>] (mount_root) from [<c0a01704>] (prepare_namespace+0x150/0x194)
[  103.644903] [<c0a01704>] (prepare_namespace) from [<c074f944>] (kernel_init+0x8/0x10c)
[  103.652815] [<c074f944>] (kernel_init) from [<c01010e8>] (ret_from_fork+0x14/0x2c)
[  103.660373] Exception stack(0xc3833fb0 to 0xc3833ff8)
[  103.665420] 3fa0:                                     00000000 00000000 00000000 00000000
[  103.673588] 3fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[  103.681754] 3fe0: 00000000 00000000 00000000 00000000 00000013 00000000
[  103.688376] ---[ end Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(2,0) ]---

可以看到 tftp 下载没有问题,但是在 nfs 挂载的时候却可以出现了报错

[ 103.536444] VFS: Unable to mount root fs via NFS, trying floppy.
[ 103.543316] VFS: Cannot open root device “nfs” or unknown-block(2,0):

于是上网找了很多方法尝试,发现这个问题遇到的人还真不少,但是我尝试了很多种方法都没有解决,我所使用的 ubuntu 版本是 22.04,这里罗列一下我所参考的几篇文章
https://blog.csdn.net/hannibaychty/article/details/126984843
https://blog.csdn.net/seeyouwlx/article/details/128428709
https://blog.csdn.net/register_k/article/details/120113228
https://blog.csdn.net/lengyuefeng212/article/details/121217025

这个问题耗费了我一天的精力,等有时间再继续排查吧。

2、直接从 SD 卡加载 kernel 和 rootfs

启动到系统下,执行下列命令

ifconfig eth0 up
ifconfig eth0 192.168.25.20
ping 192.168.25.25
mount -t nfs 192.168.25.25:/nfsroot /mnt -o nolock

荔枝派Zero(全志V3S) tftp下载 kernel 和 nfs 挂载文件系统
上述挂载成功,和下述 nfs 服务器中的文件一致
荔枝派Zero(全志V3S) tftp下载 kernel 和 nfs 挂载文件系统
从这里可以说明 kernel 中有关 nfs 的配置没问题,因此 “VFS: Unable to mount root fs via NFS, trying floppy.” 这个报错并不是 nfs 配置导致的问题,具体问题后面有时间再继续排查。


我的qq:2442391036,欢迎交流!文章来源地址https://www.toymoban.com/news/detail-481656.html

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