path: root/Documentation/nvme-rpmb.1

'\" t
.\"     Title: nvme-rpmb
.\"    Author: [FIXME: author] [see http://www.docbook.org/tdg5/en/html/author]
.\" Generator: DocBook XSL Stylesheets vsnapshot <http://docbook.sf.net/>
.\"      Date: 08/01/2022
.\"    Manual: NVMe Manual
.\"    Source: NVMe
.\"  Language: English
.\"
.TH "NVME\-RPMB" "1" "08/01/2022" "NVMe" "NVMe Manual"
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.nh
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.SH "NAME"
nvme-rpmb \- Send RPMB commands to an NVMe device
.SH "SYNOPSIS"
.sp
.nf
\fInvme rpmb\fR <device> [\-\-cmd=<command> | \-c <command>]
                    [\-\-msgfile=<data\-file> | \-f <data\-file>]
                    [\-\-keyfile=<key\-file> | \-g <key\-file>]
                    [\-\-key=<key> | \-k <key>]
                    [\-\-msg=<data> | \-d <data>]
                    [\-\-address=<offset> | \-o <offset>]
                    [\-\-blocks=<512 byte sectors> | \-b <sectors> ]
                    [\-\-target=<target\-id> | \-t <id> ]
.fi
.SH "DESCRIPTION"
.sp
For the NVMe device given, send an nvme rpmb command and provide the results\&.
.sp
The <device> parameter is mandatory and NVMe character device (ex: /dev/nvme0) must be specified\&. If the given device supports RPMB targets, command given with \-\-cmd or \-c option shall be sent to the controller\&. If given NVMe device doesn\(cqt support RPMB targets, a message indicating the same shall be printed along with controller register values related RPMB\&.
.SH "OPTIONS"
.PP
\-c <command>, \-\-cmd=<command>
.RS 4
RPMB command to be sent to the device\&. It can be one of the following
.sp
.if n \{\
.RS 4
.\}
.nf
info          \- print information regarding supported RPMB targets and
                access and total sizes\&. No further arguments are required
.fi
.if n \{\
.RE
.\}
.sp
.if n \{\
.RS 4
.\}
.nf
program\-key   \- program \*(Aqkey\*(Aq specified with \-k option or key read from
                file specified with \-\-keyfile option to the specified
                RPMB target given with \-\-target or \-t options\&. As per
                spec, this is one time action which can\*(Aqt be undone\&.
.fi
.if n \{\
.RE
.\}
.sp
.if n \{\
.RS 4
.\}
.nf
read\-counter  \- Read \*(Aqwrite counter\*(Aq of specified RPMB target\&. The
                counter value read is printed onto STDOUT
.fi
.if n \{\
.RE
.\}
.sp
.if n \{\
.RS 4
.\}
.nf
read\-config   \- Read 512 bytes of device configuration block data of
                specified RPMB target of the NVMe device\&. The data read
                is written to input file specified with \-\-msgfile or \-f
                option\&.
write\-config  \- Write 512 byes of device configuration block data
                from file specified by \-\-msgfile or \-f options to the
                RPMB target specified with \-\-target or \-t options\&.
.fi
.if n \{\
.RE
.\}
.sp
.if n \{\
.RS 4
.\}
.nf
read\-data     \- Supports authenticated data reading from specified
                RPMB target (\-\-target or \-t option) at given offset
                specified with \-\-address or \-o option, using key
                specified using \-\-keyfile or \-k options\&. \-\-blocks or
                \-o option should be given to read the amount of data
                to be read in 512 byte blocks\&.
.fi
.if n \{\
.RE
.\}
.sp
.if n \{\
.RS 4
.\}
.nf
write\-data    \- Supports authenticated data writing to specified RPMB
                target (\-\-target or \-t option) at given offset
                specified with \-\-address or \-o option, using key
                specified using \-\-keyfile or \-k options\&. \-\-blocks or
                \-o option should be given to indicate amount of data
                to be written in 512 byte blocks\&.
.fi
.if n \{\
.RE
.\}
.sp
.if n \{\
.RS 4
.\}
.nf
For data transfer (read/write) commands, if the specified size is not
within the total size supported by a target, the request is failed
nvme\-rpmb without sending it to device\&. RPMB target 0 is used as the
default target if \-\-target or \-t is not specified\&. 0x0 is used as the
default address if no \-address or \-o option is specified,
.fi
.if n \{\
.RE
.\}
.RE
.PP
\-t <target>, \-\-target=<target>
.RS 4
RPMB target id\&. This should be one of the supported RPMB targets as reported by
\fIinfo\fR
command\&. If nothing is given, default of 0 is used as RPMB target\&.
.RE
.PP
\-k <key>, \-\-key=<key>, \-g <key\-file>, \-\-keyfile=<key\-file>
.RS 4
Authentication key to be used for read/write commands\&. This should have been already programmed by
\fIprogram\-key\fR
command for given target\&. Key can be specified on command line using \-\-key or \-k options\&. Key can also be specified using file argument specified with \-\-keyfile or \-g options\&.
.RE
.PP
\-f <data\-file>, \-\-msgfile=<data\-file>
.RS 4
Name of the file to be used for data transfer commands (read or write)\&. For read command, if an existing file is specified, it will be appended\&.
.RE
.PP
\-d <data>, \-\-msg=<data>
.RS 4
These options provide the data on the command line itself\&.
.RE
.PP
\-o <offset>, \-\-address=<offset>
.RS 4
The address (in 512 byte sector offset from 0) to be used for data transfer commands (read or write) for a specified RPMB target\&.
.RE
.PP
\-b, \-\-blocks=<sectors>
.RS 4
The size in 512 byte sectors to be used for data transfer commands (read or write) for a specified RPMB target\&.
.RE
.SH "EXAMPLES"
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
Print RPMB support information of an NVMe device
.sp
.if n \{\
.RS 4
.\}
.nf
# nvme rpmb /dev/nvme0 \-\-cmd=info
.fi
.if n \{\
.RE
.\}
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
Program
\fISecretKey\fR
as authentication key for target 1
.sp
.if n \{\
.RS 4
.\}
.nf
# nvme rpmb /dev/nvme0 \-\-cmd=program\-key \-key=\*(AqSecretKey\*(Aq \-\-target=1
.fi
.if n \{\
.RE
.\}
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
Read current write counter of RPMB target 0
.sp
.if n \{\
.RS 4
.\}
.nf
# nvme rpmb /dev/nvme0 \-\-cmd=read\-counter \-\-target=0
.fi
.if n \{\
.RE
.\}
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
Read configuration data block of target 2 into config\&.bin file
.sp
.if n \{\
.RS 4
.\}
.nf
# nvme rpmb /dev/nvme0 \-\-cmd=read\-config \-\-target=2 \-f config\&.bin
.fi
.if n \{\
.RE
.\}
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
Write 200 blocks of (512 bytes) from input\&.bin onto target 0
.sp
.if n \{\
.RS 4
.\}
.nf
# nvme rpmb /dev/nvme0 \-c write\-data \-t 0 \-f input\&.bin \-b 200 \-k \*(AqSecretKey\*(Aq
.fi
.if n \{\
.RE
.\}
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
Read 200 blocks of (512 bytes) from target 2, at offset 0x100 and save the
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
data onto output\&.bin
.sp
.if n \{\
.RS 4
.\}
.nf
# nvme rpmb /dev/nvme0 \-c read\-data \-t 2 \-f out\&.bin \-b 200 \-o 0x100
.fi
.if n \{\
.RE
.\}
.RE
.SH "NVME"
.sp
Part of the nvme\-user suite