1 What: /sys/class/mei/ 1 What: /sys/class/mei/
2 Date: May 2014 2 Date: May 2014
3 KernelVersion: 3.17 3 KernelVersion: 3.17
4 Contact: Tomas Winkler <tomas.winkler@in 4 Contact: Tomas Winkler <tomas.winkler@intel.com>
5 Description: 5 Description:
6 The mei/ class sub-directory b 6 The mei/ class sub-directory belongs to mei device class
7 7
8 8
9 What: /sys/class/mei/mei<N>/ !! 9 What: /sys/class/mei/meiN/
10 Date: May 2014 10 Date: May 2014
11 KernelVersion: 3.17 11 KernelVersion: 3.17
12 Contact: Tomas Winkler <tomas.winkler@in 12 Contact: Tomas Winkler <tomas.winkler@intel.com>
13 Description: 13 Description:
14 The /sys/class/mei/meiN direct 14 The /sys/class/mei/meiN directory is created for
15 each probed mei device 15 each probed mei device
16 16
17 What: /sys/class/mei/mei<N>/fw_statu !! 17 What: /sys/class/mei/meiN/fw_status
18 Date: Nov 2014 18 Date: Nov 2014
19 KernelVersion: 3.19 19 KernelVersion: 3.19
20 Contact: Tomas Winkler <tomas.winkler@in 20 Contact: Tomas Winkler <tomas.winkler@intel.com>
21 Description: Display fw status registers co 21 Description: Display fw status registers content
22 22
23 The ME FW writes its status in 23 The ME FW writes its status information into fw status
24 registers for BIOS and OS to m 24 registers for BIOS and OS to monitor fw health.
25 25
26 The register contains running 26 The register contains running state, power management
27 state, error codes, and others 27 state, error codes, and others. The way the registers
28 are decoded depends on PCH or 28 are decoded depends on PCH or SoC generation.
29 Also number of registers varie 29 Also number of registers varies between 1 and 6
30 depending on generation. 30 depending on generation.
31 31
32 What: /sys/class/mei/mei<N>/hbm_ver <<
33 Date: Aug 2016 <<
34 KernelVersion: 4.9 <<
35 Contact: Tomas Winkler <tomas.winkler@in <<
36 Description: Display the negotiated HBM pro <<
37 <<
38 The HBM protocol version negot <<
39 between the driver and the dev <<
40 <<
41 What: /sys/class/mei/mei<N>/hbm_ver_ <<
42 Date: Aug 2016 <<
43 KernelVersion: 4.9 <<
44 Contact: Tomas Winkler <tomas.winkler@in <<
45 Description: Display the driver HBM protoco <<
46 <<
47 The HBM protocol version suppo <<
48 <<
49 What: /sys/class/mei/mei<N>/tx_queue <<
50 Date: Jan 2018 <<
51 KernelVersion: 4.16 <<
52 Contact: Tomas Winkler <tomas.winkler@in <<
53 Description: Configure tx queue limit <<
54 <<
55 Set maximal number of pending <<
56 per opened session. <<
57 <<
58 What: /sys/class/mei/mei<N>/fw_ver <<
59 Date: May 2018 <<
60 KernelVersion: 4.18 <<
61 Contact: Tomas Winkler <tomas.winkler@in <<
62 Description: Display the ME firmware versio <<
63 <<
64 The version of the platform ME <<
65 <platform>:<major>.<minor>.<mi <<
66 There can be up to three such <<
67 FW components. <<
68 <<
69 What: /sys/class/mei/mei<N>/dev_stat <<
70 Date: Mar 2019 <<
71 KernelVersion: 5.1 <<
72 Contact: Tomas Winkler <tomas.winkler@in <<
73 Description: Display the ME device state. <<
74 <<
75 The device state can have foll <<
76 INITIALIZING <<
77 INIT_CLIENTS <<
78 ENABLED <<
79 RESETTING <<
80 DISABLED <<
81 POWER_DOWN <<
82 POWER_UP <<
83 <<
84 What: /sys/class/mei/mei<N>/trc <<
85 Date: Nov 2019 <<
86 KernelVersion: 5.5 <<
87 Contact: Tomas Winkler <tomas.winkler@in <<
88 Description: Display trc status register co <<
89 <<
90 The ME FW writes Glitch Detect <<
91 status information into trc st <<
92 for BIOS and OS to monitor fw <<
93 <<
94 What: /sys/class/mei/mei<N>/kind <<
95 Date: Jul 2020 <<
96 KernelVersion: 5.8 <<
97 Contact: Tomas Winkler <tomas.winkler@in <<
98 Description: Display kind of the device <<
99 <<
100 Generic devices are marked as <<
101 while special purpose have the <<
102 names. <<
103 Available options: <<
104 - mei: generic mei device. <<
105 - itouch: itouch (ipts) mei d <<
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