phosphor-psu-code-mgmt

phosphor-psu-code-mgmt is a service to provide management for PSU code, including:

PSU code version
PSU code update

Building

meson build/ && ninja -C build

Unit test

Run it in OpenBMC CI, refer to local-ci-build.md

Run it in OE SDK, run below commands in a x86-64 SDK env:

meson -Doe-sdk=enabled -Dtests=enabled build/
ninja -C build/ test  # Meson skips running the case due to it thinks it's cross compiling
# Manually run the tests
for t in `find build/test/ -maxdepth 1 -name "test_*"`; do ./$t || break ; done

Vendor-specific tools

This repo contains generic code to handle the PSU versions and updates. It depends on vendor-specific tools to provide the below functions on the real PSU hardware:

Get PSU firmware version
Get PSU model
Compare the firmware version
Update the PSU firmware

It provides configure options for vendor-specific tools for the above functions:

PSU_VERSION_UTIL: It shall be defined as a command-line tool that accepts the PSU inventory path as input, and outputs the PSU version string to stdout.
PSU_MODEL_UTIL: It shall be defined as a command-line tool that accepts the PSU inventory path as input, and outputs the PSU model string to stdout.
PSU_VERSION_COMPARE_UTIL: It shall be defined as a command-line tool that accepts one or more PSU version strings, and outputs the latest version string to stdout.
PSU_UPDATE_SERVICE: It shall be defined as a systemd service that accepts two arguments:
- The PSU inventory DBus object;
- The path of the PSU image(s).

For example:

meson -Dtests=disabled \
    '-DPSU_VERSION_UTIL=/usr/bin/psutils --raw --get-version' \
    '-DPSU_MODEL_UTIL=/usr/bin/psutils --raw --get-model' \
    '-DPSU_VERSION_COMPARE_UTIL=/usr/bin/psutils --raw --compare' \
    '-DPSU_UPDATE_SERVICE=psu-update@.service' \
    build

The above configures the vendor-specific tools to use psutils from phosphor-power to get the PSU version and model, compare PSU versions, and use psu-update@.service to perform the PSU firmware update, where internally it invokes psutils as well.

Usage

PSU version

When the service starts, it queries the inventory to get all the PSU inventory paths, invokes the vendor-specific tool to get the versions, and creates version objects under /xyz/openbmc_project/software that are associated with the PSU inventory path. If multiple PSUs are using the same version, multiple PSU inventory paths are associated.

E.g.

Example of system with two PSUs that have different versions:

 "/xyz/openbmc_project/software/02572429": {
   "Activation": "xyz.openbmc_project.Software.Activation.Activations.Active",
   "Associations": [
     [
       "inventory",
       "activation",
       "/xyz/openbmc_project/inventory/system/chassis/motherboard/powersupply1"
     ]
   ],
   "ExtendedVersion": "",
   "Path": "",
   "Purpose": "xyz.openbmc_project.Software.Version.VersionPurpose.PSU",
   "RequestedActivation": "xyz.openbmc_project.Software.Activation.RequestedActivations.None",
   "Version": "01120114"
 },
 "/xyz/openbmc_project/software/7094f612": {
   "Activation": "xyz.openbmc_project.Software.Activation.Activations.Active",
   "Associations": [
     [
       "inventory",
       "activation",
       "/xyz/openbmc_project/inventory/system/chassis/motherboard/powersupply0"
     ]
   ],
   "ExtendedVersion": "",
   "Path": "",
   "Purpose": "xyz.openbmc_project.Software.Version.VersionPurpose.PSU",
   "RequestedActivation": "xyz.openbmc_project.Software.Activation.RequestedActivations.None",
   "Version": "00000110"
 },

Example of system with two PSUs that have the same version:

 "/xyz/openbmc_project/software/9463c2ad": {
   "Activation": "xyz.openbmc_project.Software.Activation.Activations.Active",
   "Associations": [
     [
       "inventory",
       "activation",
       "/xyz/openbmc_project/inventory/system/chassis/motherboard/powersupply0"
     ],
     [
       "inventory",
       "activation",
       "/xyz/openbmc_project/inventory/system/chassis/motherboard/powersupply1"
     ]
   ],
   "ExtendedVersion": "",
   "Path": "",
   "Purpose": "xyz.openbmc_project.Software.Version.VersionPurpose.PSU",
   "RequestedActivation": "xyz.openbmc_project.Software.Activation.RequestedActivations.None",
   "Version": "01100110"
 },

PSU update

Generate a tarball of PSU firmware image by generate-psu-tar tool.

./generate-psu-tar --image <psu-image> --version <version> --model <model> --manufacturer \
<manufacturer> --machineName <machineName> --outfile <psu.tar> --sign

To update the PSU firmware, follow the same steps as described in code-update.md:
- Upload a PSU image tarball and get the version ID;
- Set the RequestedActivation state of the uploaded image's version ID.
- Check the state and wait for the activation to be completed.
After a successful update, the PSU image and the manifest is stored in BMC's persistent storage defined by IMG_DIR_PERSIST. When a PSU is replaced, the PSU's firmware version will be checked and updated if it's older than the one stored in BMC.
It is possible to put a PSU image and MANIFEST in the built-in OpenBMC image in BMC's read-only filesystem defined by IMG_DIR_BUILTIN. When the service starts, it will compare the versions of the built-in image and the existing PSUs. If there is any PSU that has older firmware, it will be updated to the new firmware.