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git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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kernel
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linux
1.. SPDX-License-Identifier: GPL-2.0
2
3===================
4ice devlink support
5===================
6
7This document describes the devlink features implemented by the ``ice``
8device driver.
9
10Info versions
11=============
12
13The ``ice`` driver reports the following versions
14
15.. list-table:: devlink info versions implemented
16 :widths: 5 5 5 90
17
18 * - Name
19 - Type
20 - Example
21 - Description
22 * - ``board.id``
23 - fixed
24 - K65390-000
25 - The Product Board Assembly (PBA) identifier of the board.
26 * - ``fw.mgmt``
27 - running
28 - 2.1.7
29 - 3-digit version number of the management firmware running on the
30 Embedded Management Processor of the device. It controls the PHY,
31 link, access to device resources, etc. Intel documentation refers to
32 this as the EMP firmware.
33 * - ``fw.mgmt.api``
34 - running
35 - 1.5.1
36 - 3-digit version number (major.minor.patch) of the API exported over
37 the AdminQ by the management firmware. Used by the driver to
38 identify what commands are supported. Historical versions of the
39 kernel only displayed a 2-digit version number (major.minor).
40 * - ``fw.mgmt.build``
41 - running
42 - 0x305d955f
43 - Unique identifier of the source for the management firmware.
44 * - ``fw.undi``
45 - running
46 - 1.2581.0
47 - Version of the Option ROM containing the UEFI driver. The version is
48 reported in ``major.minor.patch`` format. The major version is
49 incremented whenever a major breaking change occurs, or when the
50 minor version would overflow. The minor version is incremented for
51 non-breaking changes and reset to 1 when the major version is
52 incremented. The patch version is normally 0 but is incremented when
53 a fix is delivered as a patch against an older base Option ROM.
54 * - ``fw.psid.api``
55 - running
56 - 0.80
57 - Version defining the format of the flash contents.
58 * - ``fw.bundle_id``
59 - running
60 - 0x80002ec0
61 - Unique identifier of the firmware image file that was loaded onto
62 the device. Also referred to as the EETRACK identifier of the NVM.
63 * - ``fw.app.name``
64 - running
65 - ICE OS Default Package
66 - The name of the DDP package that is active in the device. The DDP
67 package is loaded by the driver during initialization. Each
68 variation of the DDP package has a unique name.
69 * - ``fw.app``
70 - running
71 - 1.3.1.0
72 - The version of the DDP package that is active in the device. Note
73 that both the name (as reported by ``fw.app.name``) and version are
74 required to uniquely identify the package.
75 * - ``fw.app.bundle_id``
76 - running
77 - 0xc0000001
78 - Unique identifier for the DDP package loaded in the device. Also
79 referred to as the DDP Track ID. Can be used to uniquely identify
80 the specific DDP package.
81 * - ``fw.netlist``
82 - running
83 - 1.1.2000-6.7.0
84 - The version of the netlist module. This module defines the device's
85 Ethernet capabilities and default settings, and is used by the
86 management firmware as part of managing link and device
87 connectivity.
88 * - ``fw.netlist.build``
89 - running
90 - 0xee16ced7
91 - The first 4 bytes of the hash of the netlist module contents.
92
93Flash Update
94============
95
96The ``ice`` driver implements support for flash update using the
97``devlink-flash`` interface. It supports updating the device flash using a
98combined flash image that contains the ``fw.mgmt``, ``fw.undi``, and
99``fw.netlist`` components.
100
101.. list-table:: List of supported overwrite modes
102 :widths: 5 95
103
104 * - Bits
105 - Behavior
106 * - ``DEVLINK_FLASH_OVERWRITE_SETTINGS``
107 - Do not preserve settings stored in the flash components being
108 updated. This includes overwriting the port configuration that
109 determines the number of physical functions the device will
110 initialize with.
111 * - ``DEVLINK_FLASH_OVERWRITE_SETTINGS`` and ``DEVLINK_FLASH_OVERWRITE_IDENTIFIERS``
112 - Do not preserve either settings or identifiers. Overwrite everything
113 in the flash with the contents from the provided image, without
114 performing any preservation. This includes overwriting device
115 identifying fields such as the MAC address, VPD area, and device
116 serial number. It is expected that this combination be used with an
117 image customized for the specific device.
118
119The ice hardware does not support overwriting only identifiers while
120preserving settings, and thus ``DEVLINK_FLASH_OVERWRITE_IDENTIFIERS`` on its
121own will be rejected. If no overwrite mask is provided, the firmware will be
122instructed to preserve all settings and identifying fields when updating.
123
124Reload
125======
126
127The ``ice`` driver supports activating new firmware after a flash update
128using ``DEVLINK_CMD_RELOAD`` with the ``DEVLINK_RELOAD_ACTION_FW_ACTIVATE``
129action.
130
131.. code:: shell
132
133 $ devlink dev reload pci/0000:01:00.0 reload action fw_activate
134
135The new firmware is activated by issuing a device specific Embedded
136Management Processor reset which requests the device to reset and reload the
137EMP firmware image.
138
139The driver does not currently support reloading the driver via
140``DEVLINK_RELOAD_ACTION_DRIVER_REINIT``.
141
142Regions
143=======
144
145The ``ice`` driver implements the following regions for accessing internal
146device data.
147
148.. list-table:: regions implemented
149 :widths: 15 85
150
151 * - Name
152 - Description
153 * - ``nvm-flash``
154 - The contents of the entire flash chip, sometimes referred to as
155 the device's Non Volatile Memory.
156 * - ``device-caps``
157 - The contents of the device firmware's capabilities buffer. Useful to
158 determine the current state and configuration of the device.
159
160Users can request an immediate capture of a snapshot via the
161``DEVLINK_CMD_REGION_NEW``
162
163.. code:: shell
164
165 $ devlink region show
166 pci/0000:01:00.0/nvm-flash: size 10485760 snapshot [] max 1
167 pci/0000:01:00.0/device-caps: size 4096 snapshot [] max 10
168
169 $ devlink region new pci/0000:01:00.0/nvm-flash snapshot 1
170 $ devlink region dump pci/0000:01:00.0/nvm-flash snapshot 1
171
172 $ devlink region dump pci/0000:01:00.0/nvm-flash snapshot 1
173 0000000000000000 0014 95dc 0014 9514 0035 1670 0034 db30
174 0000000000000010 0000 0000 ffff ff04 0029 8c00 0028 8cc8
175 0000000000000020 0016 0bb8 0016 1720 0000 0000 c00f 3ffc
176 0000000000000030 bada cce5 bada cce5 bada cce5 bada cce5
177
178 $ devlink region read pci/0000:01:00.0/nvm-flash snapshot 1 address 0 length 16
179 0000000000000000 0014 95dc 0014 9514 0035 1670 0034 db30
180
181 $ devlink region delete pci/0000:01:00.0/nvm-flash snapshot 1
182
183 $ devlink region new pci/0000:01:00.0/device-caps snapshot 1
184 $ devlink region dump pci/0000:01:00.0/device-caps snapshot 1
185 0000000000000000 01 00 01 00 00 00 00 00 01 00 00 00 00 00 00 00
186 0000000000000010 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
187 0000000000000020 02 00 02 01 32 03 00 00 0a 00 00 00 25 00 00 00
188 0000000000000030 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
189 0000000000000040 04 00 01 00 01 00 00 00 00 00 00 00 00 00 00 00
190 0000000000000050 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
191 0000000000000060 05 00 01 00 03 00 00 00 00 00 00 00 00 00 00 00
192 0000000000000070 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
193 0000000000000080 06 00 01 00 01 00 00 00 00 00 00 00 00 00 00 00
194 0000000000000090 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
195 00000000000000a0 08 00 01 00 00 00 00 00 00 00 00 00 00 00 00 00
196 00000000000000b0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
197 00000000000000c0 12 00 01 00 01 00 00 00 01 00 01 00 00 00 00 00
198 00000000000000d0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
199 00000000000000e0 13 00 01 00 00 01 00 00 00 00 00 00 00 00 00 00
200 00000000000000f0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
201 0000000000000100 14 00 01 00 01 00 00 00 00 00 00 00 00 00 00 00
202 0000000000000110 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
203 0000000000000120 15 00 01 00 01 00 00 00 00 00 00 00 00 00 00 00
204 0000000000000130 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
205 0000000000000140 16 00 01 00 01 00 00 00 00 00 00 00 00 00 00 00
206 0000000000000150 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
207 0000000000000160 17 00 01 00 06 00 00 00 00 00 00 00 00 00 00 00
208 0000000000000170 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
209 0000000000000180 18 00 01 00 01 00 00 00 01 00 00 00 08 00 00 00
210 0000000000000190 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
211 00000000000001a0 22 00 01 00 01 00 00 00 00 00 00 00 00 00 00 00
212 00000000000001b0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
213 00000000000001c0 40 00 01 00 00 08 00 00 08 00 00 00 00 00 00 00
214 00000000000001d0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
215 00000000000001e0 41 00 01 00 00 08 00 00 00 00 00 00 00 00 00 00
216 00000000000001f0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
217 0000000000000200 42 00 01 00 00 08 00 00 00 00 00 00 00 00 00 00
218 0000000000000210 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
219
220 $ devlink region delete pci/0000:01:00.0/device-caps snapshot 1