Jetson AGX Xavier PCIe debug

1. AGX Xavier PCIe 接口定义

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2. AGX Xavier PCIex1 扩展 Ethernet

Xavier 自定义载板硬件接口定义图

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1. AGX Xavier 内核版本Kernel-4.9 配置，已默认添加了RTL8111 driver，系统会自动识别并加载RTL8111 driver
2. RTL8111 写入MAC Address，采样Realtek工具linuxpg-2.57.08.tar.bz2
   $tar -zxf linuxpg-2.57.08.tar.bz2
   $cd linuxpg-2.57.08
   $make

nvidia@jetson-0424418058628:~/work/r8111_mac$ make
make -C /usr/src/linux-headers-4.9.108-tegra/kernel-4.9  M=/home/nvidia/work/r8111_mac modules
make[1]: Entering directory '/usr/src/linux-headers-4.9.108-tegra/kernel-4.9'
  CC [M]  /home/nvidia/work/r8111_mac/pgdrv.o
  Building modules, stage 2.
  MODPOST 1 modules
  CC      /home/nvidia/work/r8111_mac/pgdrv.mod.o
  LD [M]  /home/nvidia/work/r8111_mac/pgdrv.ko
make[1]: Leaving directory '/usr/src/linux-headers-4.9.108-tegra/kernel-4.9'
nvidia@jetson-0424418058628:~/work/r8111_mac$ file pgdrv.ko 
pgdrv.ko: ELF 64-bit LSB relocatable, ARM aarch64, version 1 (SYSV), BuildID[sha1]=235d6ef28723d6ccdfeb67de4018bf1d21247cec, with debug_info, not stripped

错误1. scripts/basic/fixdep: 1: scripts/basic/fixdep: Syntax error: "(" unexpected.
解决：
$cd /usr/src/linux-headers-4.9.108-tegra/kernel-4.9
执行： sudo make modules_prepare
再返回linuxpg-2.57.08目录，运行 make 验证是否解决

3. AGX Xavier PCIe 转 USB (多路)