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How to enable lane reversal in Arria 10 PCIe interface

MDavi51
Beginner
1,068 Views

Hi all,

according to appendix B of the Arria 10 PCIe User Guide

https://www.intel.com/content/dam/www/programmable/us/en/pdfs/literature/ug/archives/ug-01145_avmm-1_0.pdf

it is possible to reverse the order of the PCIe lanes. This would be very useful for the routing, but I can't find how to enable it.

 

Have I missed the buttor, does it work automatically or does this feature not exist?

 

I am in the layout now and would not want to have to do the layout twice if this feature does not work properly...

Yours,

Marc.

 

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1 Solution
BoonT_Intel
Moderator
843 Views

Hi Sir,

Lane reversal is supported and is done automatically during link training.

 

Just to share more on PCIe. Even a device does not support lane reversal. The upstream device (eg. RP) will do the lane reversal when it detect the end point unable to make lane reversal.

 

 

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1 Reply
BoonT_Intel
Moderator
844 Views

Hi Sir,

Lane reversal is supported and is done automatically during link training.

 

Just to share more on PCIe. Even a device does not support lane reversal. The upstream device (eg. RP) will do the lane reversal when it detect the end point unable to make lane reversal.

 

 

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