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1What: /sys/class/mei/2Date: May 20143KernelVersion: 3.174Contact: Tomas Winkler <tomas.winkler@intel.com>5Description:6 The mei/ class sub-directory belongs to mei device class7 8 9What: /sys/class/mei/mei<N>/10Date: May 201411KernelVersion: 3.1712Contact: Tomas Winkler <tomas.winkler@intel.com>13Description:14 The /sys/class/mei/meiN directory is created for15 each probed mei device16 17What: /sys/class/mei/mei<N>/fw_status18Date: Nov 201419KernelVersion: 3.1920Contact: Tomas Winkler <tomas.winkler@intel.com>21Description: Display fw status registers content22 23 The ME FW writes its status information into fw status24 registers for BIOS and OS to monitor fw health.25 26 The register contains running state, power management27 state, error codes, and others. The way the registers28 are decoded depends on PCH or SoC generation.29 Also number of registers varies between 1 and 630 depending on generation.31 32What: /sys/class/mei/mei<N>/hbm_ver33Date: Aug 201634KernelVersion: 4.935Contact: Tomas Winkler <tomas.winkler@intel.com>36Description: Display the negotiated HBM protocol version.37 38 The HBM protocol version negotiated39 between the driver and the device.40 41What: /sys/class/mei/mei<N>/hbm_ver_drv42Date: Aug 201643KernelVersion: 4.944Contact: Tomas Winkler <tomas.winkler@intel.com>45Description: Display the driver HBM protocol version.46 47 The HBM protocol version supported by the driver.48 49What: /sys/class/mei/mei<N>/tx_queue_limit50Date: Jan 201851KernelVersion: 4.1652Contact: Tomas Winkler <tomas.winkler@intel.com>53Description: Configure tx queue limit54 55 Set maximal number of pending writes56 per opened session.57 58What: /sys/class/mei/mei<N>/fw_ver59Date: May 201860KernelVersion: 4.1861Contact: Tomas Winkler <tomas.winkler@intel.com>62Description: Display the ME firmware version.63 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 different67 FW components.68 69What: /sys/class/mei/mei<N>/dev_state70Date: Mar 201971KernelVersion: 5.172Contact: Tomas Winkler <tomas.winkler@intel.com>73Description: Display the ME device state.74 75 The device state can have following values:76 INITIALIZING77 INIT_CLIENTS78 ENABLED79 RESETTING80 DISABLED81 POWER_DOWN82 POWER_UP83 84What: /sys/class/mei/mei<N>/trc85Date: Nov 201986KernelVersion: 5.587Contact: Tomas Winkler <tomas.winkler@intel.com>88Description: Display trc status register content89 90 The ME FW writes Glitch Detection HW (TRC)91 status information into trc status register92 for BIOS and OS to monitor fw health.93 94What: /sys/class/mei/mei<N>/kind95Date: Jul 202096KernelVersion: 5.897Contact: Tomas Winkler <tomas.winkler@intel.com>98Description: Display kind of the device99 100 Generic devices are marked as "mei"101 while special purpose have their own102 names.103 Available options:104 - mei: generic mei device.105 - itouch: itouch (ipts) mei device.106