ice devlink support

This document describes the devlink features implemented by the ice device driver.

Info versions

The ice driver reports the following versions

devlink info versions implemented

Name	Type	Example	Description
board.id	fixed	K65390-000	The Product Board Assembly (PBA) identifier of the board.
fw.mgmt	running	2.1.7	3-digit version number of the management firmware running on the Embedded Management Processor of the device. It controls the PHY, link, access to device resources, etc. Intel documentation refers to this as the EMP firmware.
fw.mgmt.api	running	1.5.1	3-digit version number (major.minor.patch) of the API exported over the AdminQ by the management firmware. Used by the driver to identify what commands are supported. Historical versions of the kernel only displayed a 2-digit version number (major.minor).
fw.mgmt.build	running	0x305d955f	Unique identifier of the source for the management firmware.
fw.undi	running	1.2581.0	Version of the Option ROM containing the UEFI driver. The version is reported in major.minor.patch format. The major version is incremented whenever a major breaking change occurs, or when the minor version would overflow. The minor version is incremented for non-breaking changes and reset to 1 when the major version is incremented. The patch version is normally 0 but is incremented when a fix is delivered as a patch against an older base Option ROM.
fw.psid.api	running	0.80	Version defining the format of the flash contents.
fw.bundle_id	running	0x80002ec0	Unique identifier of the firmware image file that was loaded onto the device. Also referred to as the EETRACK identifier of the NVM.
fw.app.name	running	ICE OS Default Package	The name of the DDP package that is active in the device. The DDP package is loaded by the driver during initialization. Each variation of the DDP package has a unique name.
fw.app	running	1.3.1.0	The version of the DDP package that is active in the device. Note that both the name (as reported by fw.app.name) and version are required to uniquely identify the package.
fw.app.bundle_id	running	0xc0000001	Unique identifier for the DDP package loaded in the device. Also referred to as the DDP Track ID. Can be used to uniquely identify the specific DDP package.
fw.netlist	running	1.1.2000-6.7.0	The version of the netlist module. This module defines the device’s Ethernet capabilities and default settings, and is used by the management firmware as part of managing link and device connectivity.
fw.netlist.build	running	0xee16ced7	The first 4 bytes of the hash of the netlist module contents.

Flash Update

The ice driver implements support for flash update using the devlink-flash interface. It supports updating the device flash using a combined flash image that contains the fw.mgmt, fw.undi, and fw.netlist components.

List of supported overwrite modes

Bits	Behavior
DEVLINK_FLASH_OVERWRITE_SETTINGS	Do not preserve settings stored in the flash components being updated. This includes overwriting the port configuration that determines the number of physical functions the device will initialize with.
DEVLINK_FLASH_OVERWRITE_SETTINGS and DEVLINK_FLASH_OVERWRITE_IDENTIFIERS	Do not preserve either settings or identifiers. Overwrite everything in the flash with the contents from the provided image, without performing any preservation. This includes overwriting device identifying fields such as the MAC address, VPD area, and device serial number. It is expected that this combination be used with an image customized for the specific device.

The ice hardware does not support overwriting only identifiers while preserving settings, and thus DEVLINK_FLASH_OVERWRITE_IDENTIFIERS on its own will be rejected. If no overwrite mask is provided, the firmware will be instructed to preserve all settings and identifying fields when updating.

Reload

The ice driver supports activating new firmware after a flash update using DEVLINK_CMD_RELOAD with the DEVLINK_RELOAD_ACTION_FW_ACTIVATE action.

$ devlink dev reload pci/0000:01:00.0 reload action fw_activate

The new firmware is activated by issuing a device specific Embedded Management Processor reset which requests the device to reset and reload the EMP firmware image.

The driver does not currently support reloading the driver via DEVLINK_RELOAD_ACTION_DRIVER_REINIT.

Port split

The ice driver supports port splitting only for port 0, as the FW has a predefined set of available port split options for the whole device.

A system reboot is required for port split to be applied.

The following command will select the port split option with 4 ports:

$ devlink port split pci/0000:16:00.0/0 count 4

The list of all available port options will be printed to dynamic debug after each split and unsplit command. The first option is the default.

ice 0000:16:00.0: Available port split options and max port speeds (Gbps):
ice 0000:16:00.0: Status  Split      Quad 0          Quad 1
ice 0000:16:00.0:         count  L0  L1  L2  L3  L4  L5  L6  L7
ice 0000:16:00.0: Active  2     100   -   -   - 100   -   -   -
ice 0000:16:00.0:         2      50   -  50   -   -   -   -   -
ice 0000:16:00.0: Pending 4      25  25  25  25   -   -   -   -
ice 0000:16:00.0:         4      25  25   -   -  25  25   -   -
ice 0000:16:00.0:         8      10  10  10  10  10  10  10  10
ice 0000:16:00.0:         1     100   -   -   -   -   -   -   -

There could be multiple FW port options with the same port split count. When the same port split count request is issued again, the next FW port option with the same port split count will be selected.

devlink port unsplit will select the option with a split count of 1. If there is no FW option available with split count 1, you will receive an error.

Regions

The ice driver implements the following regions for accessing internal device data.

regions implemented

Name	Description
nvm-flash	The contents of the entire flash chip, sometimes referred to as the device’s Non Volatile Memory.
device-caps	The contents of the device firmware’s capabilities buffer. Useful to determine the current state and configuration of the device.

Users can request an immediate capture of a snapshot via the DEVLINK_CMD_REGION_NEW

$ devlink region show
pci/0000:01:00.0/nvm-flash: size 10485760 snapshot [] max 1
pci/0000:01:00.0/device-caps: size 4096 snapshot [] max 10

$ devlink region new pci/0000:01:00.0/nvm-flash snapshot 1
$ devlink region dump pci/0000:01:00.0/nvm-flash snapshot 1

$ devlink region dump pci/0000:01:00.0/nvm-flash snapshot 1
0000000000000000 0014 95dc 0014 9514 0035 1670 0034 db30
0000000000000010 0000 0000 ffff ff04 0029 8c00 0028 8cc8
0000000000000020 0016 0bb8 0016 1720 0000 0000 c00f 3ffc
0000000000000030 bada cce5 bada cce5 bada cce5 bada cce5

$ devlink region read pci/0000:01:00.0/nvm-flash snapshot 1 address 0 length 16
0000000000000000 0014 95dc 0014 9514 0035 1670 0034 db30

$ devlink region delete pci/0000:01:00.0/nvm-flash snapshot 1

$ devlink region new pci/0000:01:00.0/device-caps snapshot 1
$ devlink region dump pci/0000:01:00.0/device-caps snapshot 1
0000000000000000 01 00 01 00 00 00 00 00 01 00 00 00 00 00 00 00
0000000000000010 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0000000000000020 02 00 02 01 32 03 00 00 0a 00 00 00 25 00 00 00
0000000000000030 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0000000000000040 04 00 01 00 01 00 00 00 00 00 00 00 00 00 00 00
0000000000000050 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0000000000000060 05 00 01 00 03 00 00 00 00 00 00 00 00 00 00 00
0000000000000070 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0000000000000080 06 00 01 00 01 00 00 00 00 00 00 00 00 00 00 00
0000000000000090 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00000000000000a0 08 00 01 00 00 00 00 00 00 00 00 00 00 00 00 00
00000000000000b0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00000000000000c0 12 00 01 00 01 00 00 00 01 00 01 00 00 00 00 00
00000000000000d0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00000000000000e0 13 00 01 00 00 01 00 00 00 00 00 00 00 00 00 00
00000000000000f0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0000000000000100 14 00 01 00 01 00 00 00 00 00 00 00 00 00 00 00
0000000000000110 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0000000000000120 15 00 01 00 01 00 00 00 00 00 00 00 00 00 00 00
0000000000000130 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0000000000000140 16 00 01 00 01 00 00 00 00 00 00 00 00 00 00 00
0000000000000150 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0000000000000160 17 00 01 00 06 00 00 00 00 00 00 00 00 00 00 00
0000000000000170 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0000000000000180 18 00 01 00 01 00 00 00 01 00 00 00 08 00 00 00
0000000000000190 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00000000000001a0 22 00 01 00 01 00 00 00 00 00 00 00 00 00 00 00
00000000000001b0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00000000000001c0 40 00 01 00 00 08 00 00 08 00 00 00 00 00 00 00
00000000000001d0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00000000000001e0 41 00 01 00 00 08 00 00 00 00 00 00 00 00 00 00
00000000000001f0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0000000000000200 42 00 01 00 00 08 00 00 00 00 00 00 00 00 00 00
0000000000000210 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00

$ devlink region delete pci/0000:01:00.0/device-caps snapshot 1