Tegraflash nvme support

Robotics & Edge Computing Jetson & Embedded Systems Jetson Xavier NX
1

Looking through the public t194 cboot source and tegraflash scripts, it seems there is some level of ability to flash directly to nvme drives and boot directly to them. I know this isn’t what is described in the current documentation, but I figured I’d try anyways. I took a xavier nx devkit with the dev module and attached a Samsung 970 evo. Linux is able to read the drive. I then went into the r32.5.0 driver flash package and modified flash_l4t_t194_spi_sd_p3668.xml, changing

<device type="sdcard" instance="0" sector_size="512" num_sectors="33554432">

to

<device type="nvme" instance="0" sector_size="512" num_sectors="33554432">

then I ran

./flash.sh jetson-xavier-nx-devkit nvme0p1

Eventually, the final flash stage failed in tegrabct_v2 with:

[   4.0875 ] Updating mb1-bct with storage information
[   4.0885 ] tegrabct_v2 --chip 0x19 --mb1bct mb1_cold_boot_bct_MB1.bct --updatestorageinfo flash.xml.bin
[   4.0894 ] MB1-BCT version: 0x1
[   4.0897 ] There is no MB1-BCT device type corresponding to pt type: 9
[   4.0897 ] 
Error: Return value 2
Command tegrabct_v2 --chip 0x19 --mb1bct mb1_cold_boot_bct_MB1.bct --updatestorageinfo flash.xml.bin

My question is: Am I missing a bct config to support nvme or do the tegra*_v2 tools not entirely support nvme yet? I would like to flash everything to qspi and nvme directly with no sd card and no intermediary steps on the nx dev module.

3

Hi,

The nvme in cboot for T194 series SoC is not yet ready.

That is why it is not listed in below document.

https://docs.nvidia.com/jetson/l4t/index.html#page/Tegra%20Linux%20Driver%20Package%20Development%20Guide/flashing.html#wwpID0E06K0HA

4

Alright, thanks for the reply. Looking forward to when the support is done. It will be useful.