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gerrit.openbmc.org / openbmc / openpower-vpd-parser / 390fccb10f015956f4e4b91252a328d472a6bbfb
commit390fccb10f015956f4e4b91252a328d472a6bbfb[log] [tgz]
authorgirik <giridharikrishnan@gmail.com>Tue May 02 07:42:47 2023 -0500
committergirik <giridharikrishnan@gmail.com>Tue May 16 03:38:46 2023 -0500
treeef7619bf25f13d7b9ffb021d12e96ebd82772d9f
parentc78d887ccac761a70f2682fe3d5b948383cf56bd [diff]
vpd-tool: Fixing of display of KW values having 0x00s

Keywords with values "0x00..." are being displayed now in Hex.
~# /tmp/vpd_tool -r -H -O "/sys/bus/i2c/drivers/at24/8-0050/eeprom" -R VINI -K B4
{
    "/sys/bus/i2c/drivers/at24/8-0050/eeprom": {
        "B4": "0x00"
    }
}
~# /tmp/vpd_tool -r -H -O "/sys/bus/i2c/drivers/at24/8-0050/eeprom" -R VINI -K B3
{
    "/sys/bus/i2c/drivers/at24/8-0050/eeprom": {
        "B3": "0x000000000000"
    }
}
~# /tmp/vpd_tool -r -H -O "/sys/bus/i2c/drivers/at24/8-0050/eeprom" -R VINI -K B7
{
    "/sys/bus/i2c/drivers/at24/8-0050/eeprom": {
        "B7": "0x000000000000000000000000"
    }
}
HexDump results for comparison:
00000170 80 01 42 33 06 00 00 00 00 00 00 42 34 01 00 42 |..B3.......B4..B|
00000180 37 0c 00 00 00 00 00 00 00 00 00 00 00 00 50 46 |7.............PF|

Signed-off-by: Giridhari Krishna <giridharikrishnan@gmail.com>
Change-Id: I242caab54cb3c28d74819e614b99df79f881ba5a
1 file changed
tree: ef7619bf25f13d7b9ffb021d12e96ebd82772d9f
  1. examples/
  2. ibm_vpd/
  3. subprojects/
  4. test/
  5. vpd-manager/
  6. vpd-parser/
  7. vpdecc/
  8. .clang-format
  9. .gitignore
  10. app.cpp
  11. args.cpp
  12. args.hpp
  13. common_utility.cpp
  14. common_utility.hpp
  15. const.hpp
  16. defines.hpp
  17. extra-properties-example.yaml
  18. extra-properties.mako.hpp
  19. extra-properties.py
  20. ibm_vpd_app.cpp
  21. ibm_vpd_utils.cpp
  22. ibm_vpd_utils.hpp
  23. impl.cpp
  24. impl.hpp
  25. LICENSE
  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.