From: Vadim Pasternak Date: Sun, 4 May 2025 16:55:07 +0000 (+0300) Subject: Documentation/ABI: Add new attribute for mlxreg-io sysfs interfaces X-Git-Tag: v6.16-rc1~125^2~41 X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=4e29dd3821dfc6531979c4a87ca450a236d78e46;p=thirdparty%2Flinux.git Documentation/ABI: Add new attribute for mlxreg-io sysfs interfaces 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". Reviewed-by: Michael Shych Signed-off-by: Vadim Pasternak Link: https://lore.kernel.org/r/20250504165507.9003-3-vadimp@nvidia.com Reviewed-by: Ilpo Järvinen Signed-off-by: Ilpo Järvinen --- diff --git a/Documentation/ABI/stable/sysfs-driver-mlxreg-io b/Documentation/ABI/stable/sysfs-driver-mlxreg-io index 2cdfd09123da0..f59461111221c 100644 --- a/Documentation/ABI/stable/sysfs-driver-mlxreg-io +++ b/Documentation/ABI/stable/sysfs-driver-mlxreg-io @@ -715,3 +715,101 @@ 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: May 2025 +KernelVersion: 6.16 +Contact: Vadim Pasternak +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: May 2025 +KernelVersion: 6.16 +Contact: Vadim Pasternak +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: May 2025 +KernelVersion: 6.16 +Contact: Vadim Pasternak +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: May 2025 +KernelVersion: 6.16 +Contact: Vadim Pasternak +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: May 2025 +KernelVersion: 6.16 +Contact: Vadim Pasternak +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: May 2025 +KernelVersion: 6.16 +Contact: Vadim Pasternak +Description: These files expose the cause of the most recent reset of the Data + Processing Unit (DPU) board. The possible causes are: + - Power auxiliary outage or power reload. + - Thermal shutdown. + - Reset request from the 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: May 2025 +KernelVersion: 6.16 +Contact: Vadim Pasternak +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: May 2025 +KernelVersion: 6.16 +Contact: Vadim Pasternak +Description: These files show status of Unified Fabric Manager upgrade. + state. 0 - means upgrade is done, 1 - otherwise. + + The file is read only.