NVMe detection issue - handshake established only for GEN1 in failure case

[sevm89]

Dear NVidia Team

We already opened two topics about having sometimes issues with the detection of a NVMe under JetPack 4.6:

M.2 NVMe Detection issues

Dear Nvidia Team We face some problems with NVMe SSDs on our custom carrier boards. The M.2 Key M Interface is identical to the reference design. Now with some systems, we get the following two errors: [ 1.983689] nvme nvme0: pci function 0000:01:00.0 [ 1.983890] nvme 0000:01:00.0: enabling device (0000 → 0002) [ 62.167901] nvme nvme0: I/O 15 QID 0 timeout, disable controller [ 62.816003] nvme nvme0: Identify Controller failed (-4) [ 62.816037] nvme nvme0: Removing after probe…

M.2 nvme SSD detection issue

Hi, We use a M.2 M key nvme SSD(Kingston OM8PDP3256B-AB1) on our carrier board. However, Xavier NX SOM can’t detect it. (can’t find it by lspci) Here’s what we did: Issue happens when using Xavier Devkit. Issue doesn’t happen when using Nano or TX2 NX. Issue happens when SSD disk system is NTFS. Issue doesn’t happen when SSD disk system is ext4. Is there any suggestion for us to solve this problem? Thanks. Wayne

Now the SSD provider looked further into the issue and was able to see that for the successful case, the platform handshake is established twice (First Gen1 and then Gen3):

For the situation, where the SSD is not recognized successful, the platform only established one handshake (Gen1):

Do you have such experience under JetPack 4.6 and therefore had to integrate bootloader patches for JP4.6.1?
The NVME Provider suspects that the host did not try to create PCIe GEN3 link for the failure situation.

Thank you for your help.

Kind regards

[kayccc]

Sorry for the late response, have you managed to get issue resolved or still need the support? Thanks

[sevm89]

Hi Kayccc

We would still like to know if your patches addressed the issue we see in order to understand better, why the NVMe sometimes does not get detected with JetPack 4.6.
Thank you.

[kayccc]

Suggest to move on JetPack 5.1 GA SW to try to see if can be reproduced. Thanks