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bhyve: base pci_nvme_ioreq size on advertised MDTS
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Authored by chuck on May 18 2020, 4:00 PM.

Details

Summary

NVMe controllers advertise their Max Data Transfer Size (MDTS) to limit
the number of page descriptors in an I/O request. Take advantage of this
and size the struct pci_nvme_ioreq accordingly.

Ensuring these values match both future-proofs the code and allows
removing some complexity which only exists to handle this possibility.

Diff Detail

Repository
rS FreeBSD src repository
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Automatic diff as part of commit; lint not applicable.
Unit
Automatic diff as part of commit; unit tests not applicable.

Event Timeline

chuck requested review of this revision.May 18 2020, 4:00 PM
This revision was not accepted when it landed; it landed in state Needs Review.Jun 29 2020, 12:32 AM
This revision was automatically updated to reflect the committed changes.