drivers/platform/x86/p2sb.c

File Facts

System

Linux kernel

Corpus path

drivers/platform/x86/p2sb.c

Extension

.c

Size

6647 bytes

Lines

264

Domain

Driver Families

Bucket

drivers/platform

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.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• linux/bits.h
• linux/export.h
• linux/pci.h
• linux/platform_data/x86/p2sb.h
• asm/cpu_device_id.h
• asm/intel-family.h

Detected Declarations

• struct p2sb_res_cache
• function p2sb_get_devfn
• function p2sb_valid_resource
• function p2sb_read_bar0
• function p2sb_scan_and_cache_devfn
• function p2sb_scan_and_cache
• function p2sb_cache_resources
• function p2sb_read_from_cache
• function p2sb_read_from_dev
• function p2sb_bar
• function p2sb_fs_init
• export p2sb_bar

Annotated Snippet

* subsys_initcall (pci_subsys_init)
 * fs_initcall     (pcibios_assign_resources)
 */
fs_initcall_sync(p2sb_fs_init);

Annotation

• Immediate include surface: `linux/bits.h`, `linux/export.h`, `linux/pci.h`, `linux/platform_data/x86/p2sb.h`, `asm/cpu_device_id.h`, `asm/intel-family.h`.
• Detected declarations: `struct p2sb_res_cache`, `function p2sb_get_devfn`, `function p2sb_valid_resource`, `function p2sb_read_bar0`, `function p2sb_scan_and_cache_devfn`, `function p2sb_scan_and_cache`, `function p2sb_cache_resources`, `function p2sb_read_from_cache`, `function p2sb_read_from_dev`, `function p2sb_bar`.
• Atlas domain: Driver Families / drivers/platform.
• Implementation status: integration implementation candidate.

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.