Malformed TLP in pcie transaction

Robotics & Edge Computing Jetson & Embedded Systems Jetson TX2
1

I am getting the following error while communicating with a pcie device for which we are developing the driver. It is a read request from the device. Could not figure out the error in TLP.

[ +0.002792] pcieport 0000:00:01.0: AER: Uncorrected (Fatal) error received: id=0020
[ +0.007830] pcieport 0000:00:01.0: PCIe Bus Error: severity=Uncorrected (Fatal), type=Transaction Layer, id=0008(Receiver ID)
[ +0.011387] pcieport 0000:00:01.0: device [10de:10e5] error status/mask=00040000/00000000
[ +0.008415] pcieport 0000:00:01.0: [18] Malformed TLP (First)
[ +0.006851] pcieport 0000:00:01.0: TLP Header: 20000080 010001ff 00000000 80004430

2

Can you please share the output of ‘sudo lspci -vv’ command? (before you initiate read from the device)
Also, please try with length 0x1 (currently it is 0x80) and update your observations?

3

Not sure this is the proper solution for your case, but as workaround you may try to add pci=noaer in kernel boot args (link).

4

This will suppress the prints for sure, but the actual issue will still exist. (It just disables AER-Advanced Error Reporting mechanism)

5

Hi vidya
We were able to get some progress with the pcie card inserted on a pc motherboard. Will add the lspci prints when we restart work on jetson