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gerrit.openbmc.org / openbmc / openpower-occ-control / d6ced7cba1e883131f2dd3fc73616930e1082639
commitd6ced7cba1e883131f2dd3fc73616930e1082639[log] [tgz]
authorChris Cain <cjcain@us.ibm.com>Mon Oct 17 17:11:07 2022 -0500
committerChris Cain <cjcain@us.ibm.com>Thu Nov 14 10:19:12 2024 -0600
tree0546480bdc353fe86f8c925db48a208c079a56ac
parent37abe9be91df2bb173c9642a2740a425904d7921 [diff]
Add CapLimits dbus interface to occ-control app

The power cap limits were previously hosted by Settings, but those are
system settings and the limits are not really settings (users can not
adjust these). This will allow occ-control to update these limits as
required but makes them readonly on dbus.
occ-control will now be persisting these limits.

Tested on Rainier:

'''
=> busctl -l introspect org.open_power.OCC.Control /xyz/openbmc_project/control/host0/power_cap_limits
...
xyz.openbmc_project.Control.Power.CapLimits interface -         -            -
.MaxPowerCapValue                           property  u         2777         emits-change
.MinPowerCapValue                           property  u         1286         emits-change
.MinSoftPowerCapValue                       property  u         556          emits-change

=> hexdump /var/lib//openpower-occ-control/powerCapData
0000000 0001 0000 0001 0000 022c 0000 0506 0000
0000010 0ad9 0000
0000014
'''

Change-Id: I75fd98be18c884961f417cc53213b9cb06a82947
Signed-off-by: Chris Cain <cjcain@us.ibm.com>
3 files changed
tree: 0546480bdc353fe86f8c925db48a208c079a56ac
  1. example/
  2. service_files/
  3. subprojects/
  4. test/
  5. .clang-format
  6. .gitignore
  7. app.cpp
  8. file.hpp
  9. i2c_occ.cpp
  10. i2c_occ.hpp
  11. LICENSE
  12. meson.build
  13. meson.options
  14. occ-active.sh
  15. occ_command.cpp
  16. occ_command.hpp
  17. occ_dbus.cpp
  18. occ_dbus.hpp
  19. occ_device.cpp
  20. occ_device.hpp
  21. occ_errors.cpp
  22. occ_errors.hpp
  23. occ_events.hpp
  24. occ_ffdc.cpp
  25. occ_ffdc.hpp
  26. occ_manager.cpp
  27. occ_manager.hpp
  28. occ_pass_through.cpp
  29. occ_pass_through.hpp
  30. occ_presence.cpp
  31. occ_presence.hpp
  32. occ_sensor.mako.hpp
  33. occ_status.cpp
  34. occ_status.hpp
  35. OWNERS
  36. pldm.cpp
  37. pldm.hpp
  38. powercap.cpp
  39. powercap.hpp
  40. powermode.cpp
  41. powermode.hpp
  42. README.md
  43. sensor_gen.py
  44. utils.cpp
  45. utils.hpp
README.md

OpenPOWER OCC Control Service

This service will handle communications to the On-Chip Controller (OCC) on Power processors. The OCC provides processor and memory temperatures, power readings, power cap support, system power mode support, and idle power saver support. OCC Control will be interfacing with the OCC to collect the temperatures and power readings, updating the system power mode, setting power caps, and idle power save parameters.

The service is started automatically when the BMC is started.

Build Project

This project can be built with meson. The typical meson workflow is: meson builddir && ninja -C builddir.

Server

The server will start automatically after BMC is powered on.

Server status: systemctl status org.open_power.OCC.Control.service

To restart the service: systemctl restart org.open_power.OCC.Control.service

Configuration

Service files are located in service_files subdirectory.

References

Power10

IBM EnergyScale for Power10 Processor-Based Systems whitepaper: https://www.ibm.com/downloads/cas/E7RL9N4E

OCC Firmware Interface Spec for Power10: https://github.com/open-power/docs/blob/P10/occ/OCC_P10_FW_Interfaces_v1_17.pdf

OCC Firmware: https://github.com/open-power/occ/tree/master-p10

Power9

IBM EnergyScale for POWER9 Processor-Based Systems: https://www-01.ibm.com/common/ssi/cgi-bin/ssialias?htmlfid=49019149USEN&

OCC Firmware Interface Spec for POWER9: https://github.com/open-power/docs/blob/P9/occ/OCC_P9_FW_Interfaces.pdf