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Diffstat (limited to 'Documentation/ABI/testing/sysfs-class-mei')
| -rw-r--r-- | Documentation/ABI/testing/sysfs-class-mei | 105 |
1 files changed, 105 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/sysfs-class-mei b/Documentation/ABI/testing/sysfs-class-mei new file mode 100644 index 0000000000..1db36ddf8e --- /dev/null +++ b/Documentation/ABI/testing/sysfs-class-mei @@ -0,0 +1,105 @@ +What: /sys/class/mei/ +Date: May 2014 +KernelVersion: 3.17 +Contact: Tomas Winkler <tomas.winkler@intel.com> +Description: + The mei/ class sub-directory belongs to mei device class + + +What: /sys/class/mei/mei<N>/ +Date: May 2014 +KernelVersion: 3.17 +Contact: Tomas Winkler <tomas.winkler@intel.com> +Description: + The /sys/class/mei/meiN directory is created for + each probed mei device + +What: /sys/class/mei/mei<N>/fw_status +Date: Nov 2014 +KernelVersion: 3.19 +Contact: Tomas Winkler <tomas.winkler@intel.com> +Description: Display fw status registers content + + The ME FW writes its status information into fw status + registers for BIOS and OS to monitor fw health. + + The register contains running state, power management + state, error codes, and others. The way the registers + are decoded depends on PCH or SoC generation. + Also number of registers varies between 1 and 6 + depending on generation. + +What: /sys/class/mei/mei<N>/hbm_ver +Date: Aug 2016 +KernelVersion: 4.9 +Contact: Tomas Winkler <tomas.winkler@intel.com> +Description: Display the negotiated HBM protocol version. + + The HBM protocol version negotiated + between the driver and the device. + +What: /sys/class/mei/mei<N>/hbm_ver_drv +Date: Aug 2016 +KernelVersion: 4.9 +Contact: Tomas Winkler <tomas.winkler@intel.com> +Description: Display the driver HBM protocol version. + + The HBM protocol version supported by the driver. + +What: /sys/class/mei/mei<N>/tx_queue_limit +Date: Jan 2018 +KernelVersion: 4.16 +Contact: Tomas Winkler <tomas.winkler@intel.com> +Description: Configure tx queue limit + + Set maximal number of pending writes + per opened session. + +What: /sys/class/mei/mei<N>/fw_ver +Date: May 2018 +KernelVersion: 4.18 +Contact: Tomas Winkler <tomas.winkler@intel.com> +Description: Display the ME firmware version. + + The version of the platform ME firmware is in format: + <platform>:<major>.<minor>.<milestone>.<build_no>. + There can be up to three such blocks for different + FW components. + +What: /sys/class/mei/mei<N>/dev_state +Date: Mar 2019 +KernelVersion: 5.1 +Contact: Tomas Winkler <tomas.winkler@intel.com> +Description: Display the ME device state. + + The device state can have following values: + INITIALIZING + INIT_CLIENTS + ENABLED + RESETTING + DISABLED + POWER_DOWN + POWER_UP + +What: /sys/class/mei/mei<N>/trc +Date: Nov 2019 +KernelVersion: 5.5 +Contact: Tomas Winkler <tomas.winkler@intel.com> +Description: Display trc status register content + + The ME FW writes Glitch Detection HW (TRC) + status information into trc status register + for BIOS and OS to monitor fw health. + +What: /sys/class/mei/mei<N>/kind +Date: Jul 2020 +KernelVersion: 5.8 +Contact: Tomas Winkler <tomas.winkler@intel.com> +Description: Display kind of the device + + Generic devices are marked as "mei" + while special purpose have their own + names. + Available options: + - mei: generic mei device. + - itouch: itouch (ipts) mei device. |