Manual: devlink-dev
DEVLINK-DEV(8) Linux DEVLINK-DEV(8)
NAME
devlink-dev - devlink device configuration
SYNOPSIS
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 } ] [ action { driver_reinit | fw_activate } ] [ limit no_reset ]
devlink dev info [ DEV ]
devlink dev flash DEV file PATH [ target ID ]
devlink dev selftests show [ DEV ]
devlink dev selftests run DEV [ id ID... ]
DESCRIPTION
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:
BUS_NAME/BUS_ADDRESS
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 parameter
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 value.
driverinit - Set new value which will be applied during driver initialization. This configuration mode re‐
quires 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 de‐
vices 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.
action { driver_reinit | fw_activate } - Specifies the reload action required. If this argument is omitted dri‐
ver_reinit action will be used. Note that even though user asks for a specific action, the driver implementation
might require to perform another action alongside with it. For example, some driver do not support driver reinitial‐
ization being performed without fw activation. Therefore, the devlink reload command returns the list of actions
which were actrually performed.
driver_reinit - Driver entities re-initialization, applying devlink-param and devlink-resource values.
fw_activate - Activates new firmware if such image is stored and pending activation. If no limitation specified this
action may involve firmware reset. If no new image pending this action will reload current firmware image.
limit no_reset - Specifies limitation on reload action. If this argument is omitted limit is unspecified and the re‐
load action is not limited. In such case driver implementation may include reset or downtime as needed to perform the
actions.
no_reset - No reset allowed, no down time allowed, no link flap and no configuration is lost.
devlink dev info - display device information.
Display device information provided by the driver. This command can be used to query versions of the hardware compo‐
nents 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 re‐
boot.
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 loader, such as /lib/firmware.
component NAME - If device stores multiple firmware images in non-volatile memory, this parameter may be used to in‐
dicate which firmware image should be written. The value of NAME should match the component names from devlink dev
info and may be driver-dependent.
devlink dev selftests show - shows supported selftests on devlink device.
DEV - specifies the devlink device. If this argument is omitted all selftests for devlink devices are listed.
devlink dev selftests run - runs selftests on devlink device.
DEV - specifies the devlink device to execute selftests.
id ID... - The value of ID(s) should match the selftests shown in devlink dev selftests show to execute selftests on
the devlink device. If this argument is omitted all selftests supported by devlink devices are executed.
EXAMPLES
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 up‐
dates about the flash status. For example:
Preparing to flash
Flashing 100%
Flashing done
devlink dev selftests show pci/0000:01:00.0
Shows the supported selftests by the devlink device.
devlink dev selftests run pci/0000:01:00.0 id flash
Perform a flash test on the devlink device.
SEE ALSO
devlink(8), devlink-port(8), devlink-sb(8), devlink-monitor(8),
AUTHOR
Jiri Pirko
iproute2 14 Mar 2016 DEVLINK-DEV(8)