mlxbf-ptm: add ddr thermal throttle debugfs nodes

[Jitendra Lanka]

SRU Justification:

[Impact]

mlxbf-ptm is a kernel driver that provides debufgs interface for system
software to monitor Bluefield devices' power and thermal management
parameters.

[Fix]

This change:
* This change adds additional debugfs nodes that provides event counter
   and throttling states of ddr thermal management state machine.

[Test Case]

* After installing the kernel module, debugfs entry at
  /sys/kernel/debug/mlxbf-ptm will be created
* monitors/status folder contains read-only parameters reported from the
  Bluefield device

[Regression Potential]

* Minimal - as these are read-only parameters that report Bluefield device
  information.

[Other]

* This code is likely to change depending on feedback we received from
  maintainers.

[Bartlomiej Zolnierkiewicz (bzolnier)]

This bug is awaiting verification that the linux-bluefield/5.15.0-1022.24 kernel in -proposed solves the problem. Please test the kernel and update this bug with the results. If the problem is solved, change the tag 'verification-needed-jammy' to 'verification-done-jammy'. If the problem still exists, change the tag 'verification-needed-jammy' to 'verification-failed-jammy'.

If verification is not done by 5 working days from today, this fix will be dropped from the source code, and this bug will be closed.

See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to enable and use -proposed. Thank you!

[Feysel Mohammed (feyselm)]

root@bu-lab60v1-oob:~# uname -r
5.15.0-1022-bluefield
root@bu-lab60v1-oob:~# modprobe mlxbf-ptm
root@bu-lab60v1-oob:~# cd /sys/kernel/debug/mlxbf-ptm/monitors/status/
root@bu-lab60v1-oob:/sys/kernel/debug/mlxbf-ptm/monitors/status# ll
total 0
drwxr-xr-x 2 root root 0 Aug 24 20:41 ./
drwxr-xr-x 3 root root 0 Aug 24 20:41 ../
-r--r--r-- 1 root root 0 Aug 24 20:41 active_power_profile
-r--r--r-- 1 root root 0 Aug 24 20:41 atx_power_available
-r--r--r-- 1 root root 0 Aug 24 20:41 core_temp
-r--r--r-- 1 root root 0 Aug 24 20:41 ddr_temp
-r--r--r-- 1 root root 0 Aug 24 20:41 ddr_thermal_throttling_event_count
-r--r--r-- 1 root root 0 Aug 24 20:41 ddr_thermal_throttling_state
-r--r--r-- 1 root root 0 Aug 24 20:41 error_state
-r--r--r-- 1 root root 0 Aug 24 20:41 power_envelope
-r--r--r-- 1 root root 0 Aug 24 20:41 power_throttling_event_count
-r--r--r-- 1 root root 0 Aug 24 20:41 power_throttling_state
-r--r--r-- 1 root root 0 Aug 24 20:41 thermal_throttling_event_count
-r--r--r-- 1 root root 0 Aug 24 20:41 thermal_throttling_state
-r--r--r-- 1 root root 0 Aug 24 20:41 throttling_state
-r--r--r-- 1 root root 0 Aug 24 20:41 total_power
-r--r--r-- 1 root root 0 Aug 24 20:41 vr0_power
-r--r--r-- 1 root root 0 Aug 24 20:41 vr1_power