Yes, I did. Though I think I found the issue with the GPU part:
Gonna try and see if I can find a ROM for this one, but no luck in TechPowerup.
Any suggestions for the Thunderbolt ICM firmware?
Edit: found firmware for W7000, which is a 4GB variant of D300, and 270X VBIOS, which is explicitly mentioned in lscpi. Getting this with 270X:
And this with W7000:
Display isn’t working yet, though.
FYI, I’m not using an eGPU. I’m just trying to use the FirePro D300 GPU in the Mac Pro
EDIT: about MSIX PBA outside of specified BAR, I found this on Proxmox forum. Just not sure how to apply that on the Mac Pro.