bsdimp / dpc

Downstream Port Containment

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Downstream Port Containment (DPC)

The relevant changes are presently in

sys/dev/pci/pci-pci.c
sys/dev/pci/pcireg.h
sys/dev/pci/pcib_private.h

The sysctl dev.pcib.N.software_trigger_dpc can be used to synthesize a DPC event, if the switch/bridge allows it.

TODO

Taskqueue thread needs to be created and interrupt work moved to it.
Teardown code is needed
It's unclear yet if DPC, HP, and AEN can share an MSI/MSIX vector.

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Downstream Port Containment

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