Add documentation for the new attributes: - Request and response for access to protetced flashes: "global_wp_request", "global_wp_response". Only for systems equipped with BMC - grant can be provided only by BMC in case its security policy allows to grant access. - Request to unlock ASICs, which has been shutdown due-to ASIC thermal event: "shutdown_unlock". - Data processor Units (DPU) boot progress: "boot_progress". - DPU reset causes: "reset_aux_pwr_or_reload", "reset_dpu_thermal", "reset_from_main_board". - Reset control for DPU components: "perst_rst", "phy_rst", "tpm_rst", "usbphy_rst". - DPU Unified Fabric Manager upgrade - "ufm_upgrade". - Hardware Id of Data Process Unit board - "dpu_id". Signed-off-by: Vadim Pasternak <vadimp@xxxxxxxxxx> Reviewed-by: Michael Shych <michaelsh@xxxxxxxxxx> --- .../ABI/stable/sysfs-driver-mlxreg-io | 96 +++++++++++++++++++ 1 file changed, 96 insertions(+) diff --git a/Documentation/ABI/stable/sysfs-driver-mlxreg-io b/Documentation/ABI/stable/sysfs-driver-mlxreg-io index 2cdfd09123da..ef6526a6de55 100644 --- a/Documentation/ABI/stable/sysfs-driver-mlxreg-io +++ b/Documentation/ABI/stable/sysfs-driver-mlxreg-io @@ -715,3 +715,99 @@ Description: This file shows 1 in case the system reset happened due to the switch board. The file is read only. + +What: /sys/devices/platform/mlxplat/mlxreg-io/hwmon/hwmon*/global_wp_request +Date: January 2025 +KernelVersion: 6.14 +Contact: Vadim Pasternak <vadimp@xxxxxxxxxx> +Description: This file when written 1 activates request to allow access to + the write protected flashes. Such request can be performed only + for system equipped with BMC (Board Management Controller), + which can grant access to protected flashes. In case BMC allows + access - it will respond with "global_wp_response". BMC decides + regarding time window of granted access. After granted window is + expired, BMC will change value back to 0. + Default value is 0. + + The file is read/write. + +What: /sys/devices/platform/mlxplat/mlxreg-io/hwmon/hwmon*/global_wp_response +Date: January 2025 +KernelVersion: 6.14 +Contact: Vadim Pasternak <vadimp@xxxxxxxxxx> +Description: This file, when set 1, indicates that access to protected + flashes have been granted to host CPU by BMC. + Default value is 0. + + The file is read only. + +What: /sys/devices/platform/mlxplat/mlxreg-io/hwmon/hwmon*/shutdown_unlock +Date: January 2025 +KernelVersion: 6.14 +Contact: Vadim Pasternak vadimp@xxxxxxxxxx +Description: When ASICs are getting overheated, system protection + hardware mechanism enforces system reboot. After system + reboot ASICs come up in locked state. To unlock ASICs, + this file should be written 1 + Default value is 0. + + The file is read/write. + +What: /sys/devices/platform/mlxplat/i2c_mlxcpld.*/i2c-*/i2c-*/*-00**/mlxreg-io.*/hwmon/hwmon*/boot_progress +Date: January 2025 +KernelVersion: 6.14 +Contact: Vadim Pasternak <vadimp@xxxxxxxxxx> +Description: These files show the Data Process Unit board boot progress + state. Valid states are: + - 4 : OS starting. + - 5 : OS running. + - 6 : Low-Power Standby. + + The file is read only. + +What: /sys/devices/platform/mlxplat/i2c_mlxcpld.*/i2c-*/i2c-*/*-00**/mlxreg-io.*/hwmon/hwmon*/dpu_id +Date: January 2025 +KernelVersion: 6.14 +Contact: Vadim Pasternak <vadimp@xxxxxxxxxx> +Description: This file shows hardware Id of Data Process Unit board. + + The file is read only. + +What: /sys/devices/platform/mlxplat/i2c_mlxcpld.*/i2c-*/i2c-*/*-00**/mlxreg-io.*/hwmon/hwmon*/reset_aux_pwr_or_reload +What: /sys/devices/platform/mlxplat/i2c_mlxcpld.*/i2c-*/i2c-*/*-00**/mlxreg-io.*/hwmon/hwmon*/reset_dpu_thermal +What: /sys/devices/platform/mlxplat/i2c_mlxcpld.*/i2c-*/i2c-*/*-00**/mlxreg-io.*/hwmon/hwmon*/reset_from_main_board +Date: January 2025 +KernelVersion: 6.14 +Contact: Vadim Pasternak <vadimp@xxxxxxxxxx> +Description: These files show the Data Process Unit board reset cause, as + following: reset due to power auxiliary outage or power reload, reset + due to thermal shutdown, reset due to request from main board. + 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/i2c_mlxcpld.*/i2c-*/i2c-*/*-00**/mlxreg-io.*/hwmon/hwmon*/perst_rst +What: /sys/devices/platform/mlxplat/i2c_mlxcpld.*/i2c-*/i2c-*/*-00**/mlxreg-io.*/hwmon/hwmon*/phy_rst +What: /sys/devices/platform/mlxplat/i2c_mlxcpld.*/i2c-*/i2c-*/*-00**/mlxreg-io.*/hwmon/hwmon*/tpm_rst +What: /sys/devices/platform/mlxplat/i2c_mlxcpld.*/i2c-*/i2c-*/*-00**/mlxreg-io.*/hwmon/hwmon*/usbphy_rst +Date: January 2025 +KernelVersion: 6.14 +Contact: Vadim Pasternak <vadimp@xxxxxxxxxx> +Description: These files allow to reset hardware components of Data Process + Unit board. Respectively PCI, Ethernet PHY, TPM and USB PHY + resets. + Default values for all the attributes is 1. Writing 0 will + cause reset of the related component. + + The files are read/write. + +What: /sys/devices/platform/mlxplat/i2c_mlxcpld.*/i2c-*/i2c-*/*-00**/mlxreg-io.*/hwmon/hwmon*/ufm_upgrade +Date: January 2025 +KernelVersion: 6.14 +Contact: Vadim Pasternak <vadimp@xxxxxxxxxx> +Description: These files show status of Unified Fabric Manager upgrade. + state. 0 - means upgrade is done, 1 - otherwise. + + The file is read only. -- 2.44.0
