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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 | perma-
nent }
devlink dev param show [ DEV name PARAMETER ]
devlink dev reload DEV [ netns { PID | NAME | ID } ] [ action { driver_reinit | fw_acti-
vate } ] [ limit no_reset ]
devlink dev info [ DEV ]
devlink dev flash DEV file PATH [ target 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 requires restart driver by devlink reload command to apply the
new value.
permanent - New value is written to device's non-volatile memory. This configura-
tion 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.
action { driver_reinit | fw_activate } - Specifies the reload action required. If this
argument is omitted driver_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 reinitialization 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-re-
source 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 unspecificed and the reload 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 ver-
sions 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 reboot.
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
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
devlink(8), devlink-port(8), devlink-sb(8), devlink-monitor(8),
AUTHOR
Jiri Pirko <jiri AT mellanox.com>
iproute2 14 Mar 2016 DEVLINK-DEV(8)
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