DEVLINK-DEV(8)                      Linux                     DEVLINK-DEV(8)

NAME         top

       devlink-dev - devlink device configuration

SYNOPSIS         top

       devlink [ OPTIONS ] dev  { COMMAND | help }

       OPTIONS := { -V[ersion] | -n[no-nice-names] }

       devlink dev show [ DEV ]

       devlink dev help

       devlink dev eswitch set DEV [ mode { legacy | switchdev } ] [ inline-
               mode { none | link | network | transport } ] [ encap-mode {
               none | basic } ]

       devlink dev eswitch show DEV

       devlink dev param set DEV name PARAMETER value VALUE cmode { runtime
               | driverinit | permanent }

       devlink dev param show [ DEV name PARAMETER ]

       devlink dev reload DEV [ netns { PID | NAME | ID } ]

       devlink dev info [ DEV ]

       devlink dev flash DEV file PATH [ target ID ]

DESCRIPTION         top

   devlink dev show - display devlink device attributes
       DEV - specifies the devlink device to show.  If this argument is
       omitted all devices are listed.

           Format is:

   devlink dev eswitch show - display devlink device eswitch attributes
   devlink dev eswitch set - sets devlink device eswitch attributes
       mode { legacy | switchdev }
              Set eswitch mode

              legacy - Legacy SRIOV

              switchdev - SRIOV switchdev offloads

       inline-mode { none | link | network | transport }
              Some HWs need the VF driver to put part of the packet headers
              on the TX descriptor so the e-switch can do proper matching
              and steering.

              none - None

              link - L2 mode

              network - L3 mode

              transport - L4 mode

       encap-mode { none | basic }
              Set eswitch encapsulation support

              none - Disable encapsulation support

              basic - Enable encapsulation support

   devlink dev param set - set new value to devlink device configuration
       name PARAMETER
              Specify parameter name to set.

       value VALUE
              New value to set.

       cmode { runtime | driverinit | permanent }
              Configuration mode in which the new value is set.

              runtime - Set new value while driver is running. This
              configuration mode doesn't require any reset to apply the new

              driverinit - Set new value which will be applied during driver
              initialization. This configuration mode requires restart
              driver by devlink reload command to apply the new value.

              permanent - New value is written to device's non-volatile
              memory. This configuration mode requires hard reset to apply
              the new value.

   devlink dev param show - display devlink device supported configuration
       parameters attributes
       name PARAMETER Specify parameter name to show.  If this argument is
       omitted all parameters supported by devlink devices are listed.

   devlink dev reload - perform hot reload of the driver.
       DEV - Specifies the devlink device to reload.

       netns { PID | NAME | ID } - Specifies the network namespace to reload
       into, either by pid, name or id.

   devlink dev info - display device information.
       Display device information provided by the driver. This command can
       be used to query versions of the hardware components or device
       components which can't be updated ( fixed ) as well as device
       firmware which can be updated. For firmware components running
       displays the versions of firmware currently loaded into the device,
       while stored reports the versions in device's flash.  Running and
       stored versions may differ after flash has been updated, but before

       DEV - specifies the devlink device to show.  If this argument is
       omitted all devices are listed.

   devlink dev flash - write device's non-volatile memory.
       DEV - specifies the devlink device to write to.

       file PATH - Path to the file which will be written into device's
       flash. The path needs to be relative to one of the directories
       searched by the kernel firmware loaded, such as /lib/firmware.

       component NAME - If device stores multiple firmware images in non-
       volatile memory, this parameter may be used to indicate which
       firmware image should be written.  The value of NAME should match the
       component names from devlink dev info and may be driver-dependent.

EXAMPLES         top

       devlink dev show
           Shows the state of all devlink devices on the system.

       devlink dev show pci/0000:01:00.0
           Shows the state of specified devlink device.

       devlink dev eswitch show pci/0000:01:00.0
           Shows the eswitch mode of specified devlink device.

       devlink dev eswitch set pci/0000:01:00.0 mode switchdev
           Sets the eswitch mode of specified devlink device to switchdev.

       devlink dev param show pci/0000:01:00.0 name max_macs
           Shows the parameter max_macs attributes.

       devlink dev param set pci/0000:01:00.0 name internal_error_reset
       value true cmode runtime
           Sets the parameter internal_error_reset of specified devlink
           device to true.

       devlink dev reload pci/0000:01:00.0
           Performs hot reload of specified devlink device.

       devlink dev flash pci/0000:01:00.0 file firmware.bin
           Flashes the specified devlink device with provided firmware file
           name. If the driver supports it, user gets updates about the
           flash status. For example:
           Preparing to flash
           Flashing 100%
           Flashing done

SEE ALSO         top

       devlink(8), devlink-port(8), devlink-sb(8), devlink-monitor(8),

AUTHOR         top

       Jiri Pirko <>

COLOPHON         top

       This page is part of the iproute2 (utilities for controlling TCP/IP
       networking and traffic) project.  Information about the project can
       be found at 
       If you have a bug report for this manual page, send it to,  This page was obtained
       from the project's upstream Git repository
       ⟨⟩ on
       2020-05-27.  (At that time, the date of the most recent commit that
       was found in the repository was 2020-05-19.)  If you discover any
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       (which is not part of the original manual page), send a mail to

iproute2                         14 Mar 2016                  DEVLINK-DEV(8)

Pages that refer to this page: devlink(8)devlink-dpipe(8)devlink-health(8)devlink-monitor(8)devlink-port(8)devlink-region(8)devlink-sb(8)devlink-trap(8)