Gitiles
Code Review Sign In
gerrit.openbmc.org / openbmc / openpower-vpd-parser / 0e34d3574cc2512b8ac465913eb988a95c1cf808
commit0e34d3574cc2512b8ac465913eb988a95c1cf808[log] [tgz]
authorAlpana Kumari <alpankum@in.ibm.com>Sun Mar 21 11:38:03 2021 -0500
committerSantosh Puranik <santosh.puranik@in.ibm.com>Thu Mar 31 05:41:32 2022 +0000
tree4bc43c661eac9fec2f3cffcca35024935be574c3
parentd40e42d1252c4e30cd1ad7a22b8a0bf5cebf284c [diff]
Handle ECC update

By default openpower-vpd-parser contains dummy code of ecc_create
which writes 0s to the vpd-ecc. And this corrupts the ECC.

This commit will not allow the user to update any record-kwd-data
with dummy ecc_create code as it returns -1. If want to update any vpd
data then build your image with vpdecc functions implementation.

Test-
when tried to update the keyword-
busctl call com.ibm.VPD.Manager /com/ibm/VPD/Manager com.ibm.VPD.Manager WriteKeyword ossay  "/system/chassis/motherboard" "VINI" "PN" 1 65
ERROR: ECC update failed

And another terminal output-
root@rainier:/tmp# ./vpd-manager
Error: Couldn't update the ECC

Signed-off-by: Alpana Kumari <alpankum@in.ibm.com>
Change-Id: I7333a79ff06ac1acd21f9e10f99b4a78cb5705db
2 files changed
tree: 4bc43c661eac9fec2f3cffcca35024935be574c3
  1. examples/
  2. subprojects/
  3. test/
  4. vpd-manager/
  5. vpd-parser/
  6. vpdecc/
  7. .clang-format
  8. .gitignore
  9. app.cpp
  10. args.cpp
  11. args.hpp
  12. common_utility.cpp
  13. common_utility.hpp
  14. const.hpp
  15. defines.hpp
  16. extra-properties-example.yaml
  17. extra-properties.mako.hpp
  18. extra-properties.py
  19. ibm_vpd_app.cpp
  20. ibm_vpd_utils.cpp
  21. ibm_vpd_utils.hpp
  22. impl.cpp
  23. impl.hpp
  24. LICENSE
  25. MAINTAINERS
  26. meson.build
  27. meson_options.txt
  28. OWNERS
  29. README.md
  30. store.hpp
  31. types.hpp
  32. utilInterface.hpp
  33. vpd_exceptions.hpp
  34. vpd_tool.cpp
  35. vpd_tool_impl.cpp
  36. vpd_tool_impl.hpp
  37. write.cpp
  38. write.hpp
  39. writefru.mako.hpp
  40. writefru.py
  41. writefru.yaml
README.md

Overview

This repository hosts code for OpenPower and IBM IPZ format VPD parsers. Both OpenPower VPD and IPZ VPD formats are structured binaries that consist of records and keywords. A record is a collection of multiple keywords. More information about the format can be found here.

The repository consists of two distinct applications, which are:

OpenPower VPD Parser

This is a build-time YAML driven application that parses the OpenPower VPD format and uses the YAML configuration (see extra-properties-example.yaml and writefru.yaml) to determine:

  • The supported records and keywords.
  • How VPD data is translated into D-Bus interfaces and properties.

The application instance must be passed in the file path to the VPD (this can, for example, be a sysfs path exposed by the EEPROM device driver) and also the D-Bus object path(s) that EEPROM data needs to be published under.

IBM VPD Parser

This parser is can be built by passing in the --enable-ibm-parser configure option. This parser differs from the OpenPower VPD parser in the following ways:

  • It parses all the records and keywords from the VPD, including large keywords (Keywords that begin with a # and are > 255 bytes in length).
  • It relies on a runtime JSON configuration (see examples/inventory.json) to determine the D-Bus object path(s) that hold interfaces and properties representing the VPD for a given VPD file path.

Making the application runtime JSON driven allows us to support multiple systems (with different FRU configurations) to be supported in a single code image as well as making the application more flexible for future improvements.

TODOs and Future Improvements

  1. The long-term goal is to completely do away with the build time YAML driven configurations and instead reconcile the OpenPower VPD parser and the IBM VPD parser applications into a single runtime JSON driven application.
  2. Add details to the README on how to configure and build the application.
  3. More JSON documentation.
  4. Support for more IBM VPD formats.
  5. VPD Write and tool documentation.