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+'\" t
+.\"     Title: nvme-io-passthru
+.\"    Author: [FIXME: author] [see http://www.docbook.org/tdg5/en/html/author]
+.\" Generator: DocBook XSL Stylesheets vsnapshot <http://docbook.sf.net/>
+.\"      Date: 04/24/2020
+.\"    Manual: NVMe Manual
+.\"    Source: NVMe
+.\"  Language: English
+.\"
+.TH "NVME\-IO\-PASSTHRU" "1" "04/24/2020" "NVMe" "NVMe Manual"
+.\" -----------------------------------------------------------------
+.\" * Define some portability stuff
+.\" -----------------------------------------------------------------
+.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+.\" http://bugs.debian.org/507673
+.\" http://lists.gnu.org/archive/html/groff/2009-02/msg00013.html
+.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+.ie \n(.g .ds Aq \(aq
+.el       .ds Aq '
+.\" -----------------------------------------------------------------
+.\" * set default formatting
+.\" -----------------------------------------------------------------
+.\" disable hyphenation
+.nh
+.\" disable justification (adjust text to left margin only)
+.ad l
+.\" -----------------------------------------------------------------
+.\" * MAIN CONTENT STARTS HERE *
+.\" -----------------------------------------------------------------
+.SH "NAME"
+nvme-io-passthru \- Submit an arbitrary io command, return results
+.SH "SYNOPSIS"
+.sp
+.nf
+\fInvme\-io\-passthru\fR <device> [\-\-opcode=<opcode> | \-o <opcode>]
+                [\-\-flags=<flags> | \-f <flags>] [\-rsvd=<rsvd> | \-R <rsvd>]
+                [\-\-namespace\-id=<nsid> | \-nsid <nsid>]
+                [\-\-cdw2=<cdw2>] [\-\-cdw3=<cdw3>] [\-\-cdw10=<cdw10>]
+                [\-\-cdw11=<cdw11>] [\-\-cdw12=<cdw12>] [\-\-cdw13=<cdw13>]
+                [\-\-cdw14=<cdw14>] [\-\-cdw15=<cdw15>]
+                [\-\-data\-len=<data\-len> | \-l <data\-len>]
+                [\-\-metadata\-len=<len> | \-m <len>]
+                [\-\-read | \-r ] [\-\-write | \-w]
+                [\-\-input\-file=<file> | \-i <file>]
+                [\-\-timeout=<to> | \-t <to>]
+                [\-\-show\-command | \-s]
+                [\-\-dry\-run | \-d]
+                [\-\-raw\-binary | \-b]
+                [\-\-prefill=<prefill> | \-p <prefill>]
+.fi
+.SH "DESCRIPTION"
+.sp
+Submits an arbitrary NVMe IO command and returns the applicable results\&. This may be the simply the command\(cqs result and status, or may also include a buffer if the command returns one\&. This command does no interpretation of the opcodes or options\&.
+.sp
+The <device> parameter is mandatory and may be either the NVMe character device (ex: /dev/nvme0), or a namespace block device (ex: /dev/nvme0n1)\&.
+.sp
+On success, the returned structure (if applicable) may be returned in one of several ways depending on the option flags; the structure may printed by the program as a hex dump, or may be returned as a raw buffer printed to stdout for another program to parse\&.
+.SH "OPTIONS"
+.PP
+\-o <opcode>, \-\-opcode=<opcode>
+.RS 4
+The NVMe opcode to send to the device in the command
+.RE
+.PP
+\-f <flags>, \-\-flags=<flags>
+.RS 4
+The NVMe command flags to send to the device in the command
+.RE
+.PP
+\-R <rsvd>, \-\-rsvd=<rsvd>
+.RS 4
+The value for the reserved field in the command\&.
+.RE
+.PP
+\-n <nsid>, \-\-namespace\-id=<nsid>
+.RS 4
+The value for the ns\-id in the command\&. Defaults to
+\fI0\fR\&.
+.RE
+.PP
+\-\-cdw[2\-3,10\-15]=<cdw>
+.RS 4
+Specifies the command dword value for that specified entry in the command
+.RE
+.PP
+\-r, \-\-read, \-w, \-\-write
+.RS 4
+Used for the data\-direction for the command and required for commands sending/receiving data\&. Don\(cqt use both read and write at the same time\&.
+.RE
+.PP
+\-i <file>, \-\-input\-file=<file>
+.RS 4
+If the command is a data\-out (write) command, use this file to fill the buffer sent to the device\&. If no file is given, assumed to use STDIN\&.
+.RE
+.PP
+\-l <data\-len>, \-\-data\-len=<data\-len>
+.RS 4
+The data length for the buffer used for this command\&.
+.RE
+.PP
+\-m <data\-len>, \-\-metadata\-len=<data\-len>
+.RS 4
+The metadata length for the buffer used for this command\&.
+.RE
+.PP
+\-s, \-\-show\-cmd
+.RS 4
+Print out the command to be sent\&.
+.RE
+.PP
+\-d, \-\-dry\-run
+.RS 4
+Do not actually send the command\&. If want to use \-\-dry\-run option, \-\-show\-cmd option
+\fImust\fR
+be set\&. Otherwise \-\-dry\-run option will be
+\fIignored\fR\&.
+.RE
+.PP
+\-b, \-\-raw\-binary
+.RS 4
+Print the raw returned buffer to stdout if the command returns data or a structure\&.
+.RE
+.PP
+\-p <prefill>, \-\-prefill <prefill>
+.RS 4
+Prefill the buffer with a predetermined byte value\&. Defaults to 0\&. This may be useful if the data you are writing is shorter than the required buffer, and you need to pad it with a known value\&. It may also be useful if you need to confirm if a device is overwriting a buffer on a data\-in command\&.
+.RE
+.SH "EXAMPLES"
+.sp
+nvme io\-passthru /dev/nvme0n1 \-\-opcode=2 \-\-namespace\-id=1 \-\-data\-len=4096 \-\-read \-\-cdw10=0 \-\-cdw11=0 \-\-cdw12=0x70000 \-\-raw\-binary
+.SH "NVME"
+.sp
+Part of the nvme\-user suite