Change Details

- Add support for queueing and executing NVMe admin and NVM commands via ctl_run and ctl_queue. This requires fixing several places to use wrapper routines for access to shared fields between SCSI and NVMe I/O requests. It also entailed fixing a few places that were SCSI-specific to add NVME logic. In places that remain SCSI-specific assertions were added (if not already present) to catch NVMe requests. - NVMe has much simpler command ordering requirements than SCSI. In particular, the HBA is not required to enforce any specific ordering for requests with overlapping LBAs. The host is required to manage that ordering. However, fused commands (currently only COMPARE and WRITE NVM commands can be fused) are required to be executed atomically. To support fused commands, make the second half of a fused command block on the first half, and have commands submitted after a fused command pair block on the second half. - Add handlers and command tables for admin and NVM commands that operate on individual namespaces and will be passed down from an NVMe over Fabrics controller to a CTL LUN. Sponsored by: Chelsio Communications

- Add support for queueing and executing NVMe admin and NVM commands via ctl_run and ctl_queue. This requires fixing a few places that were SCSI-specific to add NVME logic. - NVMe has much simpler command ordering requirements than SCSI. In particular, the HBA is not required to enforce any specific ordering for requests with overlapping LBAs. The host is required to manage that ordering. However, fused commands (currently only COMPARE and WRITE NVM commands can be fused) are required to be executed atomically. To support fused commands, make the second half of a fused command block on the first half, and have commands submitted after a fused command pair block on the second half. - Add handlers and command tables for admin and NVM commands that operate on individual namespaces and will be passed down from an NVMe over Fabrics controller to a CTL LUN. Sponsored by: Chelsio Communications

- Add support for queueing and executing NVMe admin and NVM commands via ctl_run and ctl_queue. This requires fixing severala few places tothat were use wrapper routines for access to shared fields between SCSI and NVMe I/O requests. It also entailed fixing a few places that were SCSI-specific to add NVME logic. In places that remain SCSI-specific assertions were added (if not already present) to catch NVMe requests. - NVMe has much simpler command ordering requirements than SCSI. In particular, the HBA is not required to enforce any specific ordering for requests with overlapping LBAs. The host is required to manage that ordering. However, fused commands (currently only COMPARE and WRITE NVM commands can be fused) are required to be executed atomically. To support fused commands, make the second half of a fused command block on the first half, and have commands submitted after a fused command pair block on the second half. - Add handlers and command tables for admin and NVM commands that operate on individual namespaces and will be passed down from an NVMe over Fabrics controller to a CTL LUN. Sponsored by: Chelsio Communications