1602214dbSTomas WinklerWhat: /sys/class/mei/ 2602214dbSTomas WinklerDate: May 2014 3602214dbSTomas WinklerKernelVersion: 3.17 4602214dbSTomas WinklerContact: Tomas Winkler <tomas.winkler@intel.com> 5602214dbSTomas WinklerDescription: 6602214dbSTomas Winkler The mei/ class sub-directory belongs to mei device class 7602214dbSTomas Winkler 8602214dbSTomas Winkler 9602214dbSTomas WinklerWhat: /sys/class/mei/meiN/ 10602214dbSTomas WinklerDate: May 2014 11602214dbSTomas WinklerKernelVersion: 3.17 12602214dbSTomas WinklerContact: Tomas Winkler <tomas.winkler@intel.com> 13602214dbSTomas WinklerDescription: 14602214dbSTomas Winkler The /sys/class/mei/meiN directory is created for 15602214dbSTomas Winkler each probed mei device 16602214dbSTomas Winkler 177e4a90cbSTomas WinklerWhat: /sys/class/mei/meiN/fw_status 187e4a90cbSTomas WinklerDate: Nov 2014 197e4a90cbSTomas WinklerKernelVersion: 3.19 207e4a90cbSTomas WinklerContact: Tomas Winkler <tomas.winkler@intel.com> 217e4a90cbSTomas WinklerDescription: Display fw status registers content 227e4a90cbSTomas Winkler 237e4a90cbSTomas Winkler The ME FW writes its status information into fw status 247e4a90cbSTomas Winkler registers for BIOS and OS to monitor fw health. 257e4a90cbSTomas Winkler 267e4a90cbSTomas Winkler The register contains running state, power management 277e4a90cbSTomas Winkler state, error codes, and others. The way the registers 287e4a90cbSTomas Winkler are decoded depends on PCH or SoC generation. 297e4a90cbSTomas Winkler Also number of registers varies between 1 and 6 307e4a90cbSTomas Winkler depending on generation. 317e4a90cbSTomas Winkler 3288d1beceSAlexander UsyskinWhat: /sys/class/mei/meiN/hbm_ver 3388d1beceSAlexander UsyskinDate: Aug 2016 3488d1beceSAlexander UsyskinKernelVersion: 4.9 3588d1beceSAlexander UsyskinContact: Tomas Winkler <tomas.winkler@intel.com> 3688d1beceSAlexander UsyskinDescription: Display the negotiated HBM protocol version. 3788d1beceSAlexander Usyskin 3888d1beceSAlexander Usyskin The HBM protocol version negotiated 3988d1beceSAlexander Usyskin between the driver and the device. 4088d1beceSAlexander Usyskin 4188d1beceSAlexander UsyskinWhat: /sys/class/mei/meiN/hbm_ver_drv 4288d1beceSAlexander UsyskinDate: Aug 2016 4388d1beceSAlexander UsyskinKernelVersion: 4.9 4488d1beceSAlexander UsyskinContact: Tomas Winkler <tomas.winkler@intel.com> 4588d1beceSAlexander UsyskinDescription: Display the driver HBM protocol version. 4688d1beceSAlexander Usyskin 4788d1beceSAlexander Usyskin The HBM protocol version supported by the driver. 48af336cabSAlexander Usyskin 49af336cabSAlexander UsyskinWhat: /sys/class/mei/meiN/tx_queue_limit 50af336cabSAlexander UsyskinDate: Jan 2018 51af336cabSAlexander UsyskinKernelVersion: 4.16 52af336cabSAlexander UsyskinContact: Tomas Winkler <tomas.winkler@intel.com> 53af336cabSAlexander UsyskinDescription: Configure tx queue limit 54af336cabSAlexander Usyskin 55af336cabSAlexander Usyskin Set maximal number of pending writes 56af336cabSAlexander Usyskin per opened session. 57*3cfaeb33SAlexander Usyskin 58*3cfaeb33SAlexander UsyskinWhat: /sys/class/mei/meiN/fw_ver 59*3cfaeb33SAlexander UsyskinDate: May 2018 60*3cfaeb33SAlexander UsyskinKernelVersion: 4.18 61*3cfaeb33SAlexander UsyskinContact: Tomas Winkler <tomas.winkler@intel.com> 62*3cfaeb33SAlexander UsyskinDescription: Display the ME firmware version. 63*3cfaeb33SAlexander Usyskin 64*3cfaeb33SAlexander Usyskin The version of the platform ME firmware is in format: 65*3cfaeb33SAlexander Usyskin <platform>:<major>.<minor>.<milestone>.<build_no>. 66*3cfaeb33SAlexander Usyskin There can be up to three such blocks for different 67*3cfaeb33SAlexander Usyskin FW components. 68