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vvarela15
Visitor
Visitor
166 Views
Registered: ‎04-14-2021

Frozen State Error when loading kernel module

Hello,

I am tasked with writing a kernel module for our artix 7 on a RHEL 7 machine. I am using the example XDMA driver provided from the xilinx github here: https://github.com/Xilinx/dma_ip_drivers/tree/master/XDMA/linux-kernel.

When the kernel module is loaded I get a "xdma_error_detected: dev 0xffff9913b43d9000,0xffff9913b3d76000, frozen state error, reset controller" message. the kernel then proceeds to stop engines and set the devices offline, do a slot reset, then set the device online again. When I try to use the reg_rw tool, I always return 0xffffffff.

This error only happens when I have my PCIe card in a X1 slot. When it is in a X16 slot, everything works as expected.

How do I fix the "frozen state error"?

1 Reply
bhall0107
Adventurer
Adventurer
108 Views
Registered: ‎11-13-2018

This behavior is strange. I'm also wondering what the issue is.

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