Hi, On 2/3/21 6:36 PM, Vadim Pasternak wrote: > Add documentation for the new attributes for line cards: > - CPLDs versioning. > - Write protection control for 'nvram' devices. > - Line card reset reasons. > - Enabling burning of FPGA and CPLDs. > - Enabling burning of FPGA and gearbox SPI flashes, > - Enabling power of whole line card. > - Enabling power of QSFP ports equipped on line card. > - The maximum powered required for line card feeding. > - Line card configuration Id. > > Signed-off-by: Vadim Pasternak <vadimp@xxxxxxxxxx> > --- > Documentation/ABI/stable/sysfs-driver-mlxreg-io | 92 +++++++++++++++++++++++++ > 1 file changed, 92 insertions(+) > > diff --git a/Documentation/ABI/stable/sysfs-driver-mlxreg-io b/Documentation/ABI/stable/sysfs-driver-mlxreg-io > index 1d1a8ee59534..a22e9d6c0904 100644 > --- a/Documentation/ABI/stable/sysfs-driver-mlxreg-io > +++ b/Documentation/ABI/stable/sysfs-driver-mlxreg-io > @@ -326,3 +326,95 @@ Description: This file unlocks system after hardware or firmware thermal > locking. > > The file is read/write. > + > +What: /sys/devices/platform/mlxplat/i2c_mlxcpld.*/i2c-*/i2c-*/i2c-*/*-0032/mlxreg-io.*/hwmon/hwmon*/cpld1_pn > +What: /sys/devices/platform/mlxplat/i2c_mlxcpld.*/i2c-*/i2c-*/i2c-*/*-0032/mlxreg-io.*/hwmon/hwmon*/cpld1_version > +What: /sys/devices/platform/mlxplat/i2c_mlxcpld.*/i2c-*/i2c-*/i2c-*/*-0032/mlxreg-io.*/hwmon/hwmon*/cpld1_version_min > +Date: March 2021 > +KernelVersion: 5.12 > +Contact: Vadim Pasternak <vadimp@xxxxxxxxxx> > +Description: These files show with which CPLD major and minor versions > + and part number has been burned CPLD device on line card. > + > + The files are read only. > + > +What: /sys/devices/platform/mlxplat/i2c_mlxcpld.*/i2c-*/i2c-*/i2c-*/*-0032/mlxreg-io.*/hwmon/hwmon*/fpga1_pn > +What: /sys/devices/platform/mlxplat/i2c_mlxcpld.*/i2c-*/i2c-*/i2c-*/*-0032/mlxreg-io.*/hwmon/hwmon*/fpga1_version > +What: /sys/devices/platform/mlxplat/i2c_mlxcpld.*/i2c-*/i2c-*/i2c-*/*-0032/mlxreg-io.*/hwmon/hwmon*/fpga1_version_min > +Date: March 2021 > +KernelVersion: 5.12 > +Contact: Vadim Pasternak <vadimp@xxxxxxxxxx> > +Description: These files show with which FPGA major and minor versions > + and part number has been burned FPGA device on line card. > + > + The files are read only. > + > +What: /sys/devices/platform/mlxplat/i2c_mlxcpld.*/i2c-*/i2c-*/i2c-*/*-0032/mlxreg-io.*/hwmon/hwmon*/ini_wp > +What: /sys/devices/platform/mlxplat/i2c_mlxcpld.*/i2c-*/i2c-*/i2c-*/*-0032/mlxreg-io.*/hwmon/hwmon*/vpd_wp > +Date: March 2021 > +KernelVersion: 5.12 > +Contact: Vadim Pasternak <vadimp@xxxxxxxxxx> > +Description: These files allow to overwrite line card VPD and firmware blob > + hardware write protection mode. When attribute is set 1 - write > + protection is disabled, when 0 - enabled. By default both are > + write protected. > + > + The files are read/write. This seems to have some serious security implications. IMHO this should be tie into the kernel's new(ish) lockdown system, so that if the system is in locked-down mode writing these will not be allowed. > + > +What: /sys/devices/platform/mlxplat/i2c_mlxcpld.*/i2c-*/i2c-*/i2c-*/*-0032/mlxreg-io.*/hwmon/hwmon*/reset_aux_pwr_or_ref > +What: /sys/devices/platform/mlxplat/i2c_mlxcpld.*/i2c-*/i2c-*/i2c-*/*-0032/mlxreg-io.*/hwmon/hwmon*/reset_dc_dc_pwr_fail > +What: /sys/devices/platform/mlxplat/i2c_mlxcpld.*/i2c-*/i2c-*/i2c-*/*-0032/mlxreg-io.*/hwmon/hwmon*/reset_fpga_not_done > +What: /sys/devices/platform/mlxplat/i2c_mlxcpld.*/i2c-*/i2c-*/i2c-*/*-0032/mlxreg-io.*/hwmon/hwmon*/reset_from_chassis > +What: /sys/devices/platform/mlxplat/i2c_mlxcpld.*/i2c-*/i2c-*/i2c-*/*-0032/mlxreg-io.*/hwmon/hwmon*/reset_line_card > +What: /sys/devices/platform/mlxplat/i2c_mlxcpld.*/i2c-*/i2c-*/i2c-*/*-0032/mlxreg-io.*/hwmon/hwmon*/reset_pwr_off_from_chassis > +Date: March 2021 > +KernelVersion: 5.12 > +Contact: Vadim Pasternak <vadimp@xxxxxxxxxx> > +Description: These files show the line reset cause, as following: power > + auxiliary outage or power refresh, DC-to-DC power failure, FPGA reset > + failed, line card reset failed, power off from chassis. > + 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-*/i2c-*/*-0032/mlxreg-io.*/hwmon/hwmon*/cpld_upgrade_en > +What: /sys/devices/platform/mlxplat/i2c_mlxcpld.*/i2c-*/i2c-*/i2c-*/*-0032/mlxreg-io.*/hwmon/hwmon*/fpga_upgrade_en > +Date: March 2021 > +KernelVersion: 5.12 > +Contact: Vadim Pasternak <vadimp@xxxxxxxxxx> > +Description: These files allow CPLD and FPGA burning. Value 1 in file means burning > + is enabled, 0 - otherwise. > + > + The files are read/write. Same remark as above. > + > +What: /sys/devices/platform/mlxplat/i2c_mlxcpld.*/i2c-*/i2c-*/i2c-*/*-0032/mlxreg-io.*/hwmon/hwmon*/qsfp_pwr_en > +What: /sys/devices/platform/mlxplat/i2c_mlxcpld.*/i2c-*/i2c-*/i2c-*/*-0032/mlxreg-io.*/hwmon/hwmon*/pwr_en > +Date: March 2021 > +KernelVersion: 5.12 > +Contact: Vadim Pasternak <vadimp@xxxxxxxxxx> > +Description: These files allow to power on/off all QSFP ports and whole line card. > + The attributes are set 1 for power on, 0 - for power off. > + > + The files are read/write. > + > +What: /sys/devices/platform/mlxplat/i2c_mlxcpld.*/i2c-*/i2c-*/i2c-*/*-0032/mlxreg-io.*/hwmon/hwmon*/agb_spi_burn_en > +What: /sys/devices/platform/mlxplat/i2c_mlxcpld.*/i2c-*/i2c-*/i2c-*/*-0032/mlxreg-io.*/hwmon/hwmon*/fpga_spi_burn_en > +Date: March 2021 > +KernelVersion: 5.12 > +Contact: Vadim Pasternak <vadimp@xxxxxxxxxx> > +Description: These files allow gearboxes and FPGA SPI flash burning. > + The attributes are set 1 to enable burning, 0 - to disable. > + > + The file is read/write. Same remark as above. > + > +What: /sys/devices/platform/mlxplat/i2c_mlxcpld.*/i2c-*/i2c-*/i2c-*/*-0032/mlxreg-io.*/hwmon/hwmon*/max_power > +What: /sys/devices/platform/mlxplat/i2c_mlxcpld.*/i2c-*/i2c-*/i2c-*/*-0032/mlxreg-io.*/hwmon/hwmon*/config > +Date: March 2021 > +KernelVersion: 5.12 > +Contact: Vadim Pasternak <vadimp@xxxxxxxxxx> > +Description: These files provide the maximum powered required for line card > + feeding and line card configuration Id. > + > + The files are read only. > Regards, Hans
