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| tnt | So, I'm having some trouble with PCIe. | 15:46 |
|---|---|---|
| tnt | I can only see the device if I load the bitstream while the machine is already booted and I trigger a rescan ( echo 1 > /sys/bus/pci/rescan ). If I reboot it, I don't see it on the bus anymore. | 15:47 |
| tnt | Also, even if detected, I get [ 1359.006710] litepcie 0000:01:00.0: Version \xff\xff\xff\xff\xff\xff... so something is obviously not working. | 15:48 |
| tnt | This is also a bit worrying: [ 1293.572675] pci 0000:01:00.0: 16.000 Gb/s available PCIe bandwidth, limited by 2.5 GT/s PCIe x8 link at 0000:00:01.0 (capable of 63.008 Gb/s with 8.0 GT/s PCIe x8 link) | 15:48 |
| _florent_ | tnt: I'm assuming you are using the analog devices board that you've been able to test succesfully a few months ago? | 15:51 |
| _florent_ | tnt: is there a difference in the setup/vivado version? of the only difference is LiteX/LitePCIe? | 15:52 |
| tnt | yeah. But I've got one locally now, trying to run it on a different platform. | 15:52 |
| _florent_ | tnt: if the latter maybe try to use LitePCIe 2021.12: https://github.com/enjoy-digital/litepcie/releases/tag/2021.12 | 15:53 |
| _florent_ | so the motherboard is different from the one you were previously using? | 15:54 |
| tnt | yes. | 15:55 |
| tnt | Rebuilding now with 2021.12 tag + local changes to use the other Quad. | 15:57 |
| tnt | I'll try to recheck on the old setup tomorrow, but not sure it's going to be possible, I think the board was out-of-stock and they sent me the only one they had. | 15:58 |
| _florent_ | tnt: I currently have a ZCU106 in my office with PCIe that should be close I think to the configuration of your board, so I could also do a test. | 16:03 |
| tnt | looks pretty close indeed. | 16:04 |
| tnt | BTW theses things are mechanical nightmares ... | 16:04 |
| _florent_ | For now I only tested LitePCIe on the ZCU106 through a PCIe Riser (Gen3 X1). Doing more would requires a proper Gen3 X4 extender or indeed some weird mechanical setup... | 16:10 |
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| tnt | 16x might be easier to find. | 16:12 |
| tnt | Oh no, nm, 4x is common. | 16:12 |
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| tnt | Just rechecked both 4x and 8x modes with 2021.12 tag and identical results. | 16:29 |
| tnt | Gotta go now, but I'll check tonight if I can find anything. | 16:30 |
| _florent_ | ok | 16:31 |
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| tnt | mmm, no luck. Tried a bunch of bios options but always same behavior. | 20:30 |
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