NVMe Driver IOCTL

The FreeBSD NVMe Driver IOCTL provides a rich interface for submitting commands similar to that of the Linux NVMe Driver IOCTL. However, for completion-errors, the FreeBSD NVMe Driver IOCTL provides the entire NVMe Completion result, where the Linux IOCTL maps the completion-result to an errno value and returns that instead.

In this case, the backend will transform such errors into the NVMe equivalent. See the documentation on xnvme_cmd_ctx.