drivers/pci/hotplug/cpcihp_generic.c

File Facts

System

Linux kernel

Corpus path

drivers/pci/hotplug/cpcihp_generic.c

Extension

.c

Size

5332 bytes

Lines

208

Domain

Representative Device Path

Bucket

PCIe NVMe Storage Path

Inferred role

Representative Device Path: exported/initcall integration point

Status

integration implementation candidate

Why This File Exists

Part of the selected hardware vertical slice: PCI discovery, driver binding, NVMe queues, block requests, DMA, interrupts, and completion.

• Part of the selected hardware vertical slice: PCI discovery, driver binding, NVMe queues, block requests, DMA, interrupts, and completion.
• 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/module.h
• linux/init.h
• linux/errno.h
• linux/pci.h
• linux/string.h
• cpci_hotplug.h

Detected Declarations

• function validate_parameters
• function query_enum
• function cpcihp_generic_init
• function cpcihp_generic_exit
• module init cpcihp_generic_init

Annotated Snippet

module_init(cpcihp_generic_init);
module_exit(cpcihp_generic_exit);

MODULE_AUTHOR(DRIVER_AUTHOR);
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE("GPL");
module_param(debug, bool, S_IRUGO | S_IWUSR);
MODULE_PARM_DESC(debug, "Debugging mode enabled or not");
module_param(bridge, charp, 0);
MODULE_PARM_DESC(bridge, "Hotswap bus bridge device, <bus>:<slot> (bus and slot are in hexadecimal)");
module_param(first_slot, byte, 0);
MODULE_PARM_DESC(first_slot, "Hotswap bus first slot number");
module_param(last_slot, byte, 0);
MODULE_PARM_DESC(last_slot, "Hotswap bus last slot number");
module_param_hw(port, ushort, ioport, 0);
MODULE_PARM_DESC(port, "#ENUM signal I/O port");
module_param(enum_bit, uint, 0);
MODULE_PARM_DESC(enum_bit, "#ENUM signal bit (0-7)");

Annotation

• Immediate include surface: `linux/module.h`, `linux/init.h`, `linux/errno.h`, `linux/pci.h`, `linux/string.h`, `cpci_hotplug.h`.
• Detected declarations: `function validate_parameters`, `function query_enum`, `function cpcihp_generic_init`, `function cpcihp_generic_exit`, `module init cpcihp_generic_init`.
• Atlas domain: Representative Device Path / PCIe NVMe Storage Path.
• 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.