drivers/firmware/dmi-sysfs.c

File Facts

System

Linux kernel

Corpus path

drivers/firmware/dmi-sysfs.c

Extension

.c

Size

17282 bytes

Lines

698

Domain

Driver Families

Bucket

drivers/firmware

Inferred role

Driver Families: exported/initcall integration point

Status

integration implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

• Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.
• Exports symbols or registers init work; inspect boot/module ordering and who consumes the exported contract.
• Uses kernel synchronization; read lock ordering, sleepability, and interrupt context assumptions before translating.
• Allocates kernel memory; connect allocation flags and lifetime to context constraints.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• linux/kernel.h
• linux/init.h
• linux/module.h
• linux/types.h
• linux/kobject.h
• linux/dmi.h
• linux/capability.h
• linux/slab.h
• linux/list.h
• linux/io.h
• asm/dmi.h

Detected Declarations

• struct dmi_sysfs_entry
• struct dmi_sysfs_attribute
• struct dmi_sysfs_mapped_attribute
• struct find_dmi_data
• struct dmi_read_state
• struct dmi_entry_attr_show_data
• struct dmi_system_event_log
• function dmi_entry_free
• function dmi_sysfs_attr_show
• function find_dmi_entry_helper
• function find_dmi_entry
• function dmi_entry_length
• function dmi_entry_attr_show_helper
• function dmi_entry_attr_show
• function read_sel_8bit_indexed_io
• function read_sel_2x8bit_indexed_io
• function read_sel_16bit_indexed_io
• function dmi_sel_raw_read_io
• function dmi_sel_raw_read_phys32
• function dmi_sel_raw_read_helper
• function raw_event_log_read
• function dmi_system_event_log
• function dmi_sysfs_entry_length
• function dmi_sysfs_entry_handle
• function dmi_sysfs_entry_type
• function dmi_sysfs_entry_instance
• function dmi_sysfs_entry_position
• function dmi_entry_raw_read_helper
• function raw_read
• function dmi_sysfs_entry_release
• function dmi_sysfs_register_handle
• function cleanup_entry_list
• function dmi_sysfs_init
• function dmi_sysfs_exit
• module init dmi_sysfs_init

Annotated Snippet

module_init(dmi_sysfs_init);
module_exit(dmi_sysfs_exit);

MODULE_AUTHOR("Mike Waychison <mikew@google.com>");
MODULE_DESCRIPTION("DMI sysfs support");
MODULE_LICENSE("GPL");

Annotation

• Immediate include surface: `linux/kernel.h`, `linux/init.h`, `linux/module.h`, `linux/types.h`, `linux/kobject.h`, `linux/dmi.h`, `linux/capability.h`, `linux/slab.h`.
• Detected declarations: `struct dmi_sysfs_entry`, `struct dmi_sysfs_attribute`, `struct dmi_sysfs_mapped_attribute`, `struct find_dmi_data`, `struct dmi_read_state`, `struct dmi_entry_attr_show_data`, `struct dmi_system_event_log`, `function dmi_entry_free`, `function dmi_sysfs_attr_show`, `function find_dmi_entry_helper`.
• Atlas domain: Driver Families / drivers/firmware.
• Implementation status: integration implementation candidate.
• Synchronization appears in or near this file; preserve lock ordering, sleepability, and interrupt-context constraints.

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.