Commit 8559dc33 authored by Jacob Keller's avatar Jacob Keller Committed by David S. Miller
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devlink: convert devlink-params.txt to reStructuredText 



Convert the generic parameters descriptions into the reStructuredText
format.

Signed-off-by: default avatarJacob Keller <jacob.e.keller@intel.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 2dfaaae5

Documentation/networking/devlink/devlink-params.rst

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.. SPDX-License-Identifier: GPL-2.0



==============

Devlink Params

==============



``devlink`` provides capability for a driver to expose device parameters for low

level device functionality. Since devlink can operate at the device-wide

level, it can be used to provide configuration that may affect multiple

ports on a single device.



This document describes a number of generic parameters that are supported

across multiple drivers. Each driver is also free to add their own

parameters. Each driver must document the specific parameters they support,

whether generic or not.



Configuration modes

===================



Parameters may be set in different configuration modes.



.. list-table:: Possible configuration modes

   :widths: 5 90



   * - Name

     - Description

   * - ``runtime``

     - set while the driver is running, and takes effect immediately. No

       reset is required.

   * - ``driverinit``

     - applied while the driver initializes. Requires the user to restart

       the driver using the ``devlink`` reload command.

   * - ``permanent``

     - written to the device's non-volatile memory. A hard reset is required

       for it to take effect.



Generic configuration parameters

================================

The following is a list of generic configuration parameters that drivers may

add. Use of generic parameters is preferred over each driver creating their

own name.



.. list-table:: List of generic parameters

   :widths: 5 5 90



   * - Name

     - Type

     - Description

   * - ``enable_sriov``

     - Boolean

     - Enable Single Root I/O Virtualization (SRIOV) in the device.

   * - ``ignore_ari``

     - Boolean

     - Ignore Alternative Routing-ID Interpretation (ARI) capability. If

       enabled, the adapter will ignore ARI capability even when the

       platform has support enabled. The device will create the same number

       of partitions as when the platform does not support ARI.

   * - ``msix_vec_per_pf_max``

     - u32

     - Provides the maximum number of MSI-X interrupts that a device can

       create. Value is the same across all physical functions (PFs) in the

       device.

   * - ``msix_vec_per_pf_min``

     - u32

     - Provides the minimum number of MSI-X interrupts required for the

       device to initialize. Value is the same across all physical functions

       (PFs) in the device.

   * - ``fw_load_policy``

     - u8

     - Control the device's firmware loading policy.

        - ``DEVLINK_PARAM_FW_LOAD_POLICY_VALUE_DRIVER`` (0)

          Load firmware version preferred by the driver.

        - ``DEVLINK_PARAM_FW_LOAD_POLICY_VALUE_FLASH`` (1)

          Load firmware currently stored in flash.

        - ``DEVLINK_PARAM_FW_LOAD_POLICY_VALUE_DISK`` (2)

          Load firmware currently available on host's disk.

   * - ``reset_dev_on_drv_probe``

     - u8

     - Controls the device's reset policy on driver probe.

        - ``DEVLINK_PARAM_RESET_DEV_ON_DRV_PROBE_VALUE_UNKNOWN`` (0)

          Unknown or invalid value.

        - ``DEVLINK_PARAM_RESET_DEV_ON_DRV_PROBE_VALUE_ALWAYS`` (1)

          Always reset device on driver probe.

        - ``DEVLINK_PARAM_RESET_DEV_ON_DRV_PROBE_VALUE_NEVER`` (2)

          Never reset device on driver probe.

        - ``DEVLINK_PARAM_RESET_DEV_ON_DRV_PROBE_VALUE_DISK`` (3)

          Reset the device only if firmware can be found in the filesystem.

   * - ``enable_roce``

     - Boolean

     - Enable handling of RoCE traffic in the device.

Documentation/networking/devlink/devlink-params.txt

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Devlink configuration parameters

================================

Following is the list of configuration parameters via devlink interface.

Each parameter can be generic or driver specific and are device level

parameters.



Note that the driver-specific files should contain the generic params

they support to, with supported config modes.



Each parameter can be set in different configuration modes:

	runtime		- set while driver is running, no reset required.

	driverinit	- applied while driver initializes, requires restart

			driver by devlink reload command.

	permanent	- written to device's non-volatile memory, hard reset

			required.



Following is the list of parameters:

====================================

enable_sriov		[DEVICE, GENERIC]

			Enable Single Root I/O Virtualisation (SRIOV) in

			the device.

			Type: Boolean



ignore_ari		[DEVICE, GENERIC]

			Ignore Alternative Routing-ID Interpretation (ARI)

			capability. If enabled, adapter will ignore ARI

			capability even when platforms has the support

			enabled and creates same number of partitions when

			platform does not support ARI.

			Type: Boolean



msix_vec_per_pf_max	[DEVICE, GENERIC]

			Provides the maximum number of MSIX interrupts that

			a device can create. Value is same across all

			physical functions (PFs) in the device.

			Type: u32



msix_vec_per_pf_min	[DEVICE, GENERIC]

			Provides the minimum number of MSIX interrupts required

			for the device initialization. Value is same across all

			physical functions (PFs) in the device.

			Type: u32



fw_load_policy		[DEVICE, GENERIC]

			Controls the device's firmware loading policy.

			Valid values:

			* DEVLINK_PARAM_FW_LOAD_POLICY_VALUE_DRIVER (0)

			  Load firmware version preferred by the driver.

			* DEVLINK_PARAM_FW_LOAD_POLICY_VALUE_FLASH (1)

			  Load firmware currently stored in flash.

			* DEVLINK_PARAM_FW_LOAD_POLICY_VALUE_DISK (2)

			  Load firmware currently available on host's disk.

			Type: u8



reset_dev_on_drv_probe	[DEVICE, GENERIC]

			Controls the device's reset policy on driver probe.

			Valid values:

			* DEVLINK_PARAM_RESET_DEV_ON_DRV_PROBE_VALUE_UNKNOWN (0)

			  Unknown or invalid value.

			* DEVLINK_PARAM_RESET_DEV_ON_DRV_PROBE_VALUE_ALWAYS (1)

			  Always reset device on driver probe.

			* DEVLINK_PARAM_RESET_DEV_ON_DRV_PROBE_VALUE_NEVER (2)

			  Never reset device on driver probe.

			* DEVLINK_PARAM_RESET_DEV_ON_DRV_PROBE_VALUE_DISK (3)

			  Reset only if device firmware can be found in the

			  filesystem.

			Type: u8



enable_roce		[DEVICE, GENERIC]

			Enable handling of RoCE traffic in the device.

			Type: Boolean

Documentation/networking/devlink/index.rst

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@@ -11,5 +11,6 @@ Contents: 


   devlink-health

   devlink-info

   devlink-params

   devlink-trap

   devlink-trap-netdevsim

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