Fix interrupts delivery on ThunderX for VF IDs beyond 8

[zbb]

Summary

SR-IOV devices usually use Alternative Routing ID (ARI).
In that case slot/device is always assumed to be 0 and
function/identifier is extended to 8 bits.

Fix interrupts delivery to VF IDs beyond 8 by using a correct
DevID not limited by PCI_FUNCMAX.

Reviewed by:
Obtained from: Semihalf
Sponsored by: Cavium
Differential Revision:

[jhb]

sys/arm64/arm64/gic_v3_its.c

1599 ↗

(On Diff #14921)

This should use PCI_ARI_RID()?

However, I think you can replace all of this with just:

bsf = pci_get_rid(pci_dev);

That already handles ARI for you. Just use that instead of PCI_RID() in your original patch.

[zbb]

sys/arm64/arm64/gic_v3_its.c

1599 ↗

(On Diff #14921)

Thank you. Your solution is much better on so many levels that I have no additional comments :-)

[jhb]

sys/arm64/arm64/gic_v3_its.c

64 ↗

(On Diff #14944)

I think you don't need this anymore?

1599 ↗

(On Diff #14921)

The real credit goes to rstone@ and kib@ as Ryan added this stuff and kib@ used in the DMAR code (which is where I looked). :)