Documentation/driver-api/pldmfw/file-format.rst

Source file repositories/reference/linux-study-clean/Documentation/driver-api/pldmfw/file-format.rst

File Facts

System: Linux kernel
Corpus path: Documentation/driver-api/pldmfw/file-format.rst
Extension: .rst
Size: 6441 bytes
Lines: 204
Domain: Support Tooling And Documentation
Bucket: Documentation
Inferred role: Support Tooling And Documentation: documentation
Status: atlas-only

Why This File Exists

Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.

Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.

Dependency Surface

No C-style include directives detected by the generator.

Detected Declarations

No top-level syscall, struct, function, initcall, or export declaration detected by the generator.

Annotated Snippet

.. SPDX-License-Identifier: GPL-2.0-only

==================================
PLDM Firmware file format overview
==================================

A PLDM firmware package is a binary file which contains a header that
describes the contents of the firmware package. This includes an initial
package header, one or more firmware records, and one or more components
describing the actual flash contents to program.

This diagram provides an overview of the file format::

        overall file layout
      +----------------------+
      |                      |
      |  Package Header      |
      |                      |
      +----------------------+
      |                      |
      |  Device Records      |
      |                      |
      +----------------------+
      |                      |
      |  Component Info      |
      |                      |
      +----------------------+
      |                      |
      |  Package Header CRC  |
      |                      |
      +----------------------+
      |                      |
      |  Component Image 1   |
      |                      |
      +----------------------+
      |                      |
      |  Component Image 2   |
      |                      |
      +----------------------+
      |                      |
      |         ...          |
      |                      |
      +----------------------+
      |                      |
      |  Component Image N   |
      |                      |
      +----------------------+

Package Header
==============

The package header begins with the UUID of the PLDM file format, and
contains information about the version of the format that the file uses. It
also includes the total header size, a release date, the size of the
component bitmap, and an overall package version.

The following diagram provides an overview of the package header::

             header layout
      +-------------------------+
      | PLDM UUID               |
      +-------------------------+
      | Format Revision         |
      +-------------------------+
      | Header Size             |
      +-------------------------+
      | Release Date            |
      +-------------------------+
      | Component Bitmap Length |
      +-------------------------+

Annotation

Atlas domain: Support Tooling And Documentation / Documentation.
Implementation status: atlas-only.

Implementation Notes

This generated page is the file-by-file coverage layer; curated subsystem chapters should link here when they synthesize a multi-file control flow.
Core OS pages should be promoted from atlas-only to deep-reviewed when they explain data structures, invariants, locking, lifecycle, and C implementation snippets.
Driver-family pages are intentionally pattern-oriented unless they are part of the selected PCIe/NVMe representative device path.