Hi,
There is some interest in using the PCIe 3.0 AtomicOp capability with a
subset of devices supported by drm/amdgpu.
Adding this line to drm/amdgpu produced correct results in our tests:
pcie_capability_set_word(adev->pdev, PCI_EXP_DEVCTL2, 0x40);
I have found only a handful of examples of capability use throughout
drivers/. I see that the ARI capability is enabled if supported in
drivers/pci/pci.c.
Should the AtomicOp capabilities be similarly enabled if available? Or
might there be a reason for doing this on a per-driver basis?
--
Jay Cornwall
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