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gerrit.openbmc.org / openbmc / phosphor-power / 3cd2b407131b5f0111c3a1c50383f34f84f6f27f
commit3cd2b407131b5f0111c3a1c50383f34f84f6f27f[log] [tgz]
authorShawn McCarney <shawnmm@us.ibm.com>Sat Jan 30 15:35:58 2021 -0600
committerShawn McCarney <shawnmm@us.ibm.com>Sat Jan 30 17:05:10 2021 -0600
treef84751a82f36f37bd51326d2539c98f1f6bc4be7
parent48033bf62871ac8c2572cebdfb4d5aab31e41f71 [diff]
regulators: Handle expected D-Bus exceptions

When hardware is not present, it can appear multiple ways on D-Bus:
* Object path does not exist
* Object path exists, but Inventory.Item interface not implemented
* Inventory.Item interface implemented with Present value of false

The first two cases result in a D-Bus exception being thrown when trying
to obtain the value of the Present property.

Enhance the DBusPresenceService class to catch these exceptions and
treat them as a false Presence value.

Tested:
* Tested where hardware present
* Tested where hardware not present
  * Object path and interface/property exist
  * Object path exists
  * Object path does not exist
* For full test plan, see
  https://gist.github.com/smccarney/d3d7384700abcc5abf436e2b859d98e5

Signed-off-by: Shawn McCarney <shawnmm@us.ibm.com>
Change-Id: I543a4c16984dea3657b8024dedd1060dda4319e2
2 files changed
tree: f84751a82f36f37bd51326d2539c98f1f6bc4be7
  1. cold-redundancy/
  2. example/
  3. org/
  4. phosphor-power-supply/
  5. phosphor-regulators/
  6. power-sequencer/
  7. power-supply/
  8. services/
  9. test/
  10. tools/
  11. .clang-format
  12. .gitignore
  13. argument.hpp
  14. device.hpp
  15. device_monitor.hpp
  16. elog-errors.hpp
  17. file_descriptor.hpp
  18. gpio.cpp
  19. gpio.hpp
  20. LICENSE
  21. MAINTAINERS
  22. meson.build
  23. meson_options.txt
  24. names_values.hpp
  25. pmbus.cpp
  26. pmbus.hpp
  27. README.md
  28. types.hpp
  29. utility.cpp
  30. utility.hpp
README.md

Overview

This repository contains applications for configuring and monitoring devices that deliver power to the system.

  • cold-redundancy: Application that makes power supplies work in Cold Redundancy mode and rotates them at intervals.
  • phosphor-power-supply: Next generation power supply monitoring application.
  • phosphor-regulators: JSON-driven application that configures and monitors voltage regulators.
  • power-sequencer: A power sequencer monitoring application.
  • power-supply: Original power supply monitoring application.
  • tools/power-utils: Power supply utilities.

Build

To build all applications in this repository:

  meson build
  ninja -C build

To clean the repository and remove all build output:

  rm -rf build

You can specify meson options to customize the build process. For example, you can specify:

  • Which applications to build and install.
  • Application-specific configuration data, such as power sequencer type.
  • Whether to build tests.

Power Supply Monitor and Util JSON config

Several applications in this repository require a PSU JSON config to run. The JSON config file provides information for:

  • Where to access the pmbus attributes
  • Which attribute file in pmbus maps to which property and interface in D-Bus
  • Which kernel device directory is used on which PSU

There is an example psu.json to describe the necessary configurations.

  • inventoryPMBusAccessType defines the pmbus access type, which tells the service which sysfs type to use to read the attributes. The possible values are:
    • Base: The base dir, e.g. /sys/bus/i2c/devices/3-0069/
    • Hwmon: The hwmon dir, e.g. /sys/bus/i2c/devices/3-0069/hwmon/hwmonX/
    • Debug: The pmbus debug dir, e.g. /sys/kernel/debug/pmbus/hwmonX/
    • DeviceDebug: The device debug dir, e.g. '/sys/kernel/debug/./`
    • HwmonDeviceDebug: The hwmon device debug dir, e.g. /sys/kernel/debug/pmbus/hwmonX/cffps1/
  • fruConfigs defines the mapping between the attribute file and the FRU inventory interface and property. The configuration example below indicates that the service will read part_number attribute file from a directory specified by the above pmbus access type, and assign to PartNumber property in xyz.openbmc_project.Inventory.Decorator.Asset interface.
      "fruConfigs": [
    {
      "propertyName": "PartNumber",
      "fileName": "part_number",
      "interface": "xyz.openbmc_project.Inventory.Decorator.Asset"
    }
  ]
  • psuDevices defines the kernel device dir for each PSU in inventory. The configuration example below indicates that powersupply0's device is located in /sys/bus/i2c/devices/3-0069.
      "psuDevices": {
    "/xyz/openbmc_project/inventory/system/chassis/motherboard/powersupply0" : "/sys/bus/i2c/devices/3-0069",
  }