4 Contact: Tomas Winkler <tomas.winkler@intel.com>
6 The mei/ class sub-directory belongs to mei device class
9 What: /sys/class/mei/meiN/
12 Contact: Tomas Winkler <tomas.winkler@intel.com>
14 The /sys/class/mei/meiN directory is created for
15 each probed mei device
17 What: /sys/class/mei/meiN/fw_status
20 Contact: Tomas Winkler <tomas.winkler@intel.com>
21 Description: Display fw status registers content
23 The ME FW writes its status information into fw status
24 registers for BIOS and OS to monitor fw health.
26 The register contains running state, power management
27 state, error codes, and others. The way the registers
28 are decoded depends on PCH or SoC generation.
29 Also number of registers varies between 1 and 6
30 depending on generation.
32 What: /sys/class/mei/meiN/hbm_ver
35 Contact: Tomas Winkler <tomas.winkler@intel.com>
36 Description: Display the negotiated HBM protocol version.
38 The HBM protocol version negotiated
39 between the driver and the device.
41 What: /sys/class/mei/meiN/hbm_ver_drv
44 Contact: Tomas Winkler <tomas.winkler@intel.com>
45 Description: Display the driver HBM protocol version.
47 The HBM protocol version supported by the driver.
49 What: /sys/class/mei/meiN/tx_queue_limit
52 Contact: Tomas Winkler <tomas.winkler@intel.com>
53 Description: Configure tx queue limit
55 Set maximal number of pending writes
58 What: /sys/class/mei/meiN/fw_ver
61 Contact: Tomas Winkler <tomas.winkler@intel.com>
62 Description: Display the ME firmware version.
64 The version of the platform ME firmware is in format:
65 <platform>:<major>.<minor>.<milestone>.<build_no>.
66 There can be up to three such blocks for different
69 What: /sys/class/mei/meiN/dev_state
72 Contact: Tomas Winkler <tomas.winkler@intel.com>
73 Description: Display the ME device state.
75 The device state can have following values:
84 What: /sys/class/mei/meiN/trc
87 Contact: Tomas Winkler <tomas.winkler@intel.com>
88 Description: Display trc status register content
90 The ME FW writes Glitch Detection HW (TRC)
91 status information into trc status register
92 for BIOS and OS to monitor fw health.
94 What: /sys/class/mei/meiN/kind
97 Contact: Tomas Winkler <tomas.winkler@intel.com>
98 Description: Display kind of the device
100 Generic devices are marked as "mei"
101 while special purpose have their own
104 - mei: generic mei device.
105 - itouch: itouch (ipts) mei device.