What: /sys/devices/platform/mlxplat/mlxreg-io/hwmon/hwmon*/asic_health Date: June 2018 KernelVersion: 4.19 Contact: Vadim Pasternak Description: This file shows ASIC health status. The possible values are: 0 - health failed, 2 - health OK, 3 - ASIC in booting state. The files are read only. What: /sys/devices/platform/mlxplat/mlxreg-io/hwmon/hwmon*/cpld1_version What: /sys/devices/platform/mlxplat/mlxreg-io/hwmon/hwmon*/cpld2_version Date: June 2018 KernelVersion: 4.19 Contact: Vadim Pasternak Description: These files show with which CPLD versions have been burned on carrier and switch boards. The files are read only. What: /sys/devices/platform/mlxplat/mlxreg-io/hwmon/hwmon*/fan_dir Date: December 2018 KernelVersion: 5.0 Contact: Vadim Pasternak Description: This file shows the system fans direction: forward direction - relevant bit is set 0; reversed direction - relevant bit is set 1. The files are read only. What: /sys/devices/platform/mlxplat/mlxreg-io/hwmon/hwmon*/cpld3_version Date: November 2018 KernelVersion: 5.0 Contact: Vadim Pasternak Description: These files show with which CPLD versions have been burned on LED or Gearbox board. The files are read only. What: /sys/devices/platform/mlxplat/mlxreg-io/hwmon/hwmon*/jtag_enable Date: November 2018 KernelVersion: 5.0 Contact: Vadim Pasternak Description: These files enable and disable the access to the JTAG domain. By default access to the JTAG domain is disabled. The file is read/write. What: /sys/devices/platform/mlxplat/mlxreg-io/hwmon/hwmon*/select_iio Date: June 2018 KernelVersion: 4.19 Contact: Vadim Pasternak Description: This file allows iio devices selection. Attribute select_iio can be written with 0 or with 1. It selects which one of iio devices can be accessed. The file is read/write. What: /sys/devices/platform/mlxplat/mlxreg-io/hwmon/hwmon*/psu1_on /sys/devices/platform/mlxplat/mlxreg-io/hwmon/hwmon*/psu2_on /sys/devices/platform/mlxplat/mlxreg-io/hwmon/hwmon*/pwr_cycle /sys/devices/platform/mlxplat/mlxreg-io/hwmon/hwmon*/pwr_down Date: June 2018 KernelVersion: 4.19 Contact: Vadim Pasternak Description: These files allow asserting system power cycling, switching power supply units on and off and system's main power domain shutdown. Expected behavior: When pwr_cycle is written 1: auxiliary power domain will go down and after short period (about 1 second) up. When psu1_on or psu2_on is written 1, related unit will be disconnected from the power source, when written 0 - connected. If both are written 1 - power supplies main power domain will go down. When pwr_down is written 1, system's main power domain will go down. The files are write only. What: /sys/devices/platform/mlxplat/mlxreg-io/hwmon/hwmon*/reset_aux_pwr_or_ref What: /sys/devices/platform/mlxplat/mlxreg-io/hwmon/hwmon*/reset_asic_thermal What: /sys/devices/platform/mlxplat/mlxreg-io/hwmon/hwmon*/reset_hotswap_or_halt What: /sys/devices/platform/mlxplat/mlxreg-io/hwmon/hwmon*/reset_hotswap_or_wd What: /sys/devices/platform/mlxplat/mlxreg-io/hwmon/hwmon*/reset_fw_reset What: /sys/devices/platform/mlxplat/mlxreg-io/hwmon/hwmon*/reset_long_pb What: /sys/devices/platform/mlxplat/mlxreg-io/hwmon/hwmon*/reset_main_pwr_fail What: /sys/devices/platform/mlxplat/mlxreg-io/hwmon/hwmon*/reset_short_pb What: /sys/devices/platform/mlxplat/mlxreg-io/hwmon/hwmon*/reset_sw_reset Date: June 2018 KernelVersion: 4.19 Contact: Vadim Pasternak Description: These files show the system reset cause, as following: power auxiliary outage or power refresh, ASIC thermal shutdown, halt, hotswap, watchdog, firmware reset, long press power button, short press power button, software reset. Value 1 in file means this is reset cause, 0 - otherwise. Only one of the above causes could be 1 at the same time, representing only last reset cause. The files are read only. What: /sys/devices/platform/mlxplat/mlxreg-io/hwmon/hwmon*/reset_comex_pwr_fail What: /sys/devices/platform/mlxplat/mlxreg-io/hwmon/hwmon*/reset_from_comex What: /sys/devices/platform/mlxplat/mlxreg-io/hwmon/hwmon*/reset_system What: /sys/devices/platform/mlxplat/mlxreg-io/hwmon/hwmon*/reset_voltmon_upgrade_fail Date: November 2018 KernelVersion: 5.0 Contact: Vadim Pasternak Description: These files show the system reset cause, as following: ComEx power fail, reset from ComEx, system platform reset, reset due to voltage monitor devices upgrade failure, Value 1 in file means this is reset cause, 0 - otherwise. Only one bit could be 1 at the same time, representing only the last reset cause. The files are read only. What: /sys/devices/platform/mlxplat/mlxreg-io/hwmon/hwmon*/cpld4_version Date: November 2018 KernelVersion: 5.0 Contact: Vadim Pasternak Description: These files show with which CPLD versions have been burned on LED board. The files are read only. What: /sys/devices/platform/mlxplat/mlxreg-io/hwmon/hwmon*/reset_comex_thermal What: /sys/devices/platform/mlxplat/mlxreg-io/hwmon/hwmon*/reset_comex_wd What: /sys/devices/platform/mlxplat/mlxreg-io/hwmon/hwmon*/reset_from_asic What: /sys/devices/platform/mlxplat/mlxreg-io/hwmon/hwmon*/reset_reload_bios What: /sys/devices/platform/mlxplat/mlxreg-io/hwmon/hwmon*/reset_sff_wd What: /sys/devices/platform/mlxplat/mlxreg-io/hwmon/hwmon*/reset_swb_wd Date: June 2019 KernelVersion: 5.3 Contact: Vadim Pasternak Description: These files show the system reset cause, as following: COMEX thermal shutdown; wathchdog power off or reset was derived by one of the next components: COMEX, switch board or by Small Form Factor mezzanine, reset requested from ASIC, reset caused by BIOS reload. Value 1 in file means this is reset cause, 0 - otherwise. Only one of the above causes could be 1 at the same time, representing only last reset cause. The files are read only. What: /sys/devices/platform/mlxplat/mlxreg-io/hwmon/hwmon*/config1 What: /sys/devices/platform/mlxplat/mlxreg-io/hwmon/hwmon*/config2 Date: January 2020 KernelVersion: 5.6 Contact: Vadim Pasternak Description: These files show system static topology identification like system's static I2C topology, number and type of FPGA devices within the system and so on. The files are read only. What: /sys/devices/platform/mlxplat/mlxreg-io/hwmon/hwmon*/reset_ac_pwr_fail What: /sys/devices/platform/mlxplat/mlxreg-io/hwmon/hwmon*/reset_platform What: /sys/devices/platform/mlxplat/mlxreg-io/hwmon/hwmon*/reset_soc What: /sys/devices/platform/mlxplat/mlxreg-io/hwmon/hwmon*/reset_sw_pwr_off Date: January 2020 KernelVersion: 5.6 Contact: Vadim Pasternak Description: These files show the system reset causes, as following: reset due to AC power failure, reset invoked from software by assertion reset signal through CPLD. reset caused by signal asserted by SOC through ACPI register, reset invoked from software by assertion power off signal through CPLD. The files are read only. What: /sys/devices/platform/mlxplat/mlxreg-io/hwmon/hwmon*/pcie_asic_reset_dis Date: January 2020 KernelVersion: 5.6 Contact: Vadim Pasternak Description: This file allows to retain ASIC up during PCIe root complex reset, when attribute is set 1. The file is read/write. What: /sys/devices/platform/mlxplat/mlxreg-io/hwmon/hwmon*/vpd_wp Date: January 2020 KernelVersion: 5.6 Contact: Vadim Pasternak Description: This file allows to overwrite system VPD hardware write protection when attribute is set 1. The file is read/write. What: /sys/devices/platform/mlxplat/mlxreg-io/hwmon/hwmon*/voltreg_update_status Date: January 2020 KernelVersion: 5.6 Contact: Vadim Pasternak Description: This file exposes the configuration update status of burnable voltage regulator devices. The status values are as following: 0 - OK; 1 - CRC failure; 2 = I2C failure; 3 - in progress. The file is read only. What: /sys/devices/platform/mlxplat/mlxreg-io/hwmon/hwmon*/ufm_version Date: January 2020 KernelVersion: 5.6 Contact: Vadim Pasternak Description: This file exposes the firmware version of burnable voltage regulator devices. The file is read only. What: /sys/devices/platform/mlxplat/mlxreg-io/hwmon/hwmon*/cpld1_pn What: /sys/devices/platform/mlxplat/mlxreg-io/hwmon/hwmon*/cpld2_pn What: /sys/devices/platform/mlxplat/mlxreg-io/hwmon/hwmon*/cpld3_pn What: /sys/devices/platform/mlxplat/mlxreg-io/hwmon/hwmon*/cpld4_pn What: /sys/devices/platform/mlxplat/mlxreg-io/hwmon/hwmon*/cpld1_version_min What: /sys/devices/platform/mlxplat/mlxreg-io/hwmon/hwmon*/cpld2_version_min What: /sys/devices/platform/mlxplat/mlxreg-io/hwmon/hwmon*/cpld3_version_min What: /sys/devices/platform/mlxplat/mlxreg-io/hwmon/hwmon*/cpld4_version_min Date: July 2020 KernelVersion: 5.9 Contact: Vadim Pasternak Description: These files show with which CPLD part numbers and minor versions have been burned CPLD devices equipped on a system. The files are read only. What: /sys/devices/platform/mlxplat/mlxreg-io/hwmon/hwmon*/bios_active_image What: /sys/devices/platform/mlxplat/mlxreg-io/hwmon/hwmon*/bios_auth_fail What: /sys/devices/platform/mlxplat/mlxreg-io/hwmon/hwmon*/bios_upgrade_fail Date: October 2021 KernelVersion: 5.16 Contact: Vadim Pasternak Description: The files represent BIOS statuses: - bios_active_image: location of current active BIOS image: 0: Top, 1: Bottom. The reported value should correspond to value expected by OS in case of BIOS safe mode is 0. This bit is related to Intel top-swap feature of DualBios on the same flash. - bios_auth_fail: BIOS upgrade is failed because provided BIOS image is not signed correctly. - bios_upgrade_fail: BIOS upgrade is failed by some other reason not because authentication. For example due to physical SPI flash problem. The files are read only. What: /sys/devices/platform/mlxplat/mlxreg-io/hwmon/hwmon*/lc1_enable What: /sys/devices/platform/mlxplat/mlxreg-io/hwmon/hwmon*/lc2_enable What: /sys/devices/platform/mlxplat/mlxreg-io/hwmon/hwmon*/lc3_enable What: /sys/devices/platform/mlxplat/mlxreg-io/hwmon/hwmon*/lc4_enable What: /sys/devices/platform/mlxplat/mlxreg-io/hwmon/hwmon*/lc5_enable What: /sys/devices/platform/mlxplat/mlxreg-io/hwmon/hwmon*/lc6_enable What: /sys/devices/platform/mlxplat/mlxreg-io/hwmon/hwmon*/lc7_enable What: /sys/devices/platform/mlxplat/mlxreg-io/hwmon/hwmon*/lc8_enable Date: October 2021 KernelVersion: 5.16 Contact: Vadim Pasternak Description: These files allow line cards enable state control. Expected behavior: When lc{n}_enable is written 1, related line card is released from the reset state, when 0 - is hold in reset state. The files are read/write. What: /sys/devices/platform/mlxplat/mlxreg-io/hwmon/hwmon*/lc1_pwr What: /sys/devices/platform/mlxplat/mlxreg-io/hwmon/hwmon*/lc2_pwr What: /sys/devices/platform/mlxplat/mlxreg-io/hwmon/hwmon*/lc3_pwr What: /sys/devices/platform/mlxplat/mlxreg-io/hwmon/hwmon*/lc4_pwr What: /sys/devices/platform/mlxplat/mlxreg-io/hwmon/hwmon*/lc5_pwr What: /sys/devices/platform/mlxplat/mlxreg-io/hwmon/hwmon*/lc6_pwr What: /sys/devices/platform/mlxplat/mlxreg-io/hwmon/hwmon*/lc7_pwr What: /sys/devices/platform/mlxplat/mlxreg-io/hwmon/hwmon*/lc8_pwr Date: October 2021 KernelVersion: 5.16 Contact: Vadim Pasternak Description: These files switching line cards power on and off. Expected behavior: When lc{n}_pwr is written 1, related line card is powered on, when written 0 - powered off. The files are read/write. What: /sys/devices/platform/mlxplat/mlxreg-io/hwmon/hwmon*/lc1_rst_mask What: /sys/devices/platform/mlxplat/mlxreg-io/hwmon/hwmon*/lc2_rst_mask What: /sys/devices/platform/mlxplat/mlxreg-io/hwmon/hwmon*/lc3_rst_mask What: /sys/devices/platform/mlxplat/mlxreg-io/hwmon/hwmon*/lc4_rst_mask What: /sys/devices/platform/mlxplat/mlxreg-io/hwmon/hwmon*/lc5_rst_mask What: /sys/devices/platform/mlxplat/mlxreg-io/hwmon/hwmon*/lc6_rst_mask What: /sys/devices/platform/mlxplat/mlxreg-io/hwmon/hwmon*/lc7_rst_mask What: /sys/devices/platform/mlxplat/mlxreg-io/hwmon/hwmon*/lc8_rst_mask Date: October 2021 KernelVersion: 5.16 Contact: Vadim Pasternak Description: These files clear line card reset bit enforced by ASIC, when it sets it due to some abnormal ASIC behavior. Expected behavior: When lc{n}_rst_mask is written 1, related line card reset bit is cleared, when written 0 - no effect. The files are write only. What: /sys/devices/platform/mlxplat/mlxreg-io/hwmon/hwmon*/os_started Date: October 2021 KernelVersion: 5.16 Contact: Vadim Pasternak Description: This file, when written 1, indicates to programmable devices that OS is taking control over it. The file is read/write. What: /sys/devices/platform/mlxplat/mlxreg-io/hwmon/hwmon*/pm_mgmt_en Date: October 2021 KernelVersion: 5.16 Contact: Vadim Pasternak Description: This file assigns power management control ownership. When power management control is provided by hardware, hardware will automatically power off one or more line previously powered line cards in case system power budget is getting insufficient. It could be in case when some of power units lost power good state. When pm_mgmt_en is written 1, power management control by software is enabled, 0 - power management control by hardware. Note that for any setting of pm_mgmt_en attribute hardware will not allow to power on any new line card in case system power budget is insufficient. Same in case software will try to power on several line cards at once - hardware will power line cards while system has enough power budget. Default is 0. The file is read/write. What: /sys/devices/platform/mlxplat/mlxreg-io/hwmon/hwmon*/psu3_on What: /sys/devices/platform/mlxplat/mlxreg-io/hwmon/hwmon*/psu4_on Date: October 2021 KernelVersion: 5.16 Contact: Vadim Pasternak Description: These files switching power supply units on and off. Expected behavior: When psu3_on or psu4_on is written 1, related unit will be disconnected from the power source, when written 0 - connected. The files are write only. What: /sys/devices/platform/mlxplat/mlxreg-io/hwmon/hwmon*/shutdown_unlock Date: October 2021 KernelVersion: 5.16 Contact: Vadim Pasternak Description: This file allows to unlock ASIC after thermal shutdown event. When system thermal shutdown is enforced by ASIC, ASIC is getting locked and after system boot it will not be available. Software can decide to unlock it by setting this attribute to 1 and then perform system power cycle by setting pwr_cycle attribute to 1 (power cycle of main power domain). Before setting shutdown_unlock to 1 it is recommended to validate that system reboot cause is reset_asic_thermal or reset_thermal_spc_or_pciesw. In case shutdown_unlock is not set 1, the only way to release ASIC from locking - is full system power cycle through the external power distribution unit. Default is 1. The file is read/write.