# nvme-rpmb(1) Manual Page

## NAME

nvme-rpmb - Send RPMB commands to an NVMe device

## SYNOPSIS

    nvme rpmb <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> ]

## DESCRIPTION

For the NVMe device given, send an nvme rpmb command and provide the results.

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’t support RPMB targets, a message indicating the same shall be printed along with controller register values related RPMB.

## OPTIONS

-c <command>
--cmd=<command>

  RPMB command to be sent to the device. It can be one of the following

      info          - print information regarding supported RPMB targets and
                      access and total sizes. No further arguments are required

      program-key   - program 'key' 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't be undone.

      read-couter   - Read 'write counter' of specified RPMB target. The
                      counter value read is printed onto STDOUT

      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.

      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.

      write-data    - Supports authenticated data writting 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.

      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,

-t <target>
--target=<target>

  RPMB target id. This should be one of the supported RPMB targets as reported by info command. If nothing is given, default of 0 is used as RPMB target.

-k <key>
--key=<key>
-g <key-file>
--keyfile=<key-file>

  Authentication key to be used for read/write commands. This should have been already programmed by program-key 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.

-f <data-file>
--msgfile=<data-file>

  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.

-d <data>
--msg=<data>

  These options provide the data on the command line itself.

-o <offset>
--address=<offset>

  The address (in 512 byte sector offset from 0) to be used for data trasnfer commands (read or write) for a specified RPMB target.

-b
--blocks=<sectors>

  The size in 512 byte sectors to be used for data trasnfer commands (read or write) for a specified RPMB target.

## EXAMPLES

- Print RPMB support information of an NVMe device

      # nvme rpmb /dev/nvme0 --cmd=info

- Program SecreteKey as authentication key for target 1

      # nvme rpmb /dev/nvme0 --cmd=program-key -key='SecretKey' --target=1

- Read current write counter of RPMB target 0

      # nvme rpmb /dev/nvme0 --cmd=read-counter --target=0

- Read configuration data block of target 2 into config.bin file

      # nvme rpmb /dev/nvme0 --cmd=read-config --target=2 -f config.bin

- Write 200 blocks of (512 bytes) from input.bin onto target 0

      # nvme rpmb /dev/nvme0 -c write-data -t 0 -f input.bin -b 200 -k 'SecreteKey'

- Read 200 blocks of (512 bytes) from target 2, at offset 0x100 and save the

- data onto output.bin

      # nvme rpmb /dev/nvme0 -c read-data -t 2 -f out.bin -b 200 -o 0x100

## NVME

Part of the nvme-user suite