drivers/misc/pch_phub.c

File Facts

System

Linux kernel

Corpus path

drivers/misc/pch_phub.c

Extension

.c

Size

27674 bytes

Lines

880

Domain

Driver Families

Bucket

drivers/misc

Inferred role

Driver Families: operation-table or driver-model contract

Status

pattern 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.
• Defines an operation table; this is where Linux turns generic core objects into subsystem-specific behavior.
• 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/module.h
• linux/kernel.h
• linux/types.h
• linux/fs.h
• linux/hex.h
• linux/uaccess.h
• linux/string.h
• linux/pci.h
• linux/io.h
• linux/delay.h
• linux/mutex.h
• linux/if_ether.h
• linux/ctype.h
• linux/dmi.h
• linux/of.h

Detected Declarations

• struct pch_phub_reg
• function pch_phub_read_modify_write_reg
• function pch_phub_save_reg_conf
• function pch_phub_restore_reg_conf
• function pch_phub_read_serial_rom
• function pch_phub_write_serial_rom
• function pch_phub_read_serial_rom_val
• function pch_phub_write_serial_rom_val
• function pch_phub_gbe_serial_rom_conf
• function pch_phub_gbe_serial_rom_conf_mp
• function pch_phub_read_gbe_mac_addr
• function pch_phub_write_gbe_mac_addr
• function pch_phub_bin_read
• function pch_phub_bin_write
• function show_pch_mac
• function store_pch_mac
• function pch_phub_probe
• function pch_phub_remove
• function pch_phub_suspend
• function pch_phub_resume

Annotated Snippet

static struct pci_driver pch_phub_driver = {
	.name = "pch_phub",
	.id_table = pch_phub_pcidev_id,
	.probe = pch_phub_probe,
	.remove = pch_phub_remove,
	.driver.pm = &pch_phub_pm_ops,
};

module_pci_driver(pch_phub_driver);

MODULE_DESCRIPTION("Intel EG20T PCH/LAPIS Semiconductor IOH(ML7213/ML7223) PHUB");
MODULE_LICENSE("GPL");

Annotation

• Immediate include surface: `linux/module.h`, `linux/kernel.h`, `linux/types.h`, `linux/fs.h`, `linux/hex.h`, `linux/uaccess.h`, `linux/string.h`, `linux/pci.h`.
• Detected declarations: `struct pch_phub_reg`, `function pch_phub_read_modify_write_reg`, `function pch_phub_save_reg_conf`, `function pch_phub_restore_reg_conf`, `function pch_phub_read_serial_rom`, `function pch_phub_write_serial_rom`, `function pch_phub_read_serial_rom_val`, `function pch_phub_write_serial_rom_val`, `function pch_phub_gbe_serial_rom_conf`, `function pch_phub_gbe_serial_rom_conf_mp`.
• Atlas domain: Driver Families / drivers/misc.
• Implementation status: pattern 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.