drivers/pci/hotplug/cpcihp_zt5550.c

File Facts

System

Linux kernel

Corpus path

drivers/pci/hotplug/cpcihp_zt5550.c

Extension

.c

Size

7467 bytes

Lines

310

Domain

Representative Device Path

Bucket

PCIe NVMe Storage Path

Inferred role

Representative Device Path: operation-table or driver-model contract

Status

pattern 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.
• Defines an operation table; this is where Linux turns generic core objects into subsystem-specific behavior.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• linux/module.h
• linux/moduleparam.h
• linux/init.h
• linux/errno.h
• linux/pci.h
• linux/interrupt.h
• linux/signal.h
• cpci_hotplug.h
• cpcihp_zt5550.h

Detected Declarations

• function zt5550_hc_config
• function zt5550_hc_cleanup
• function zt5550_hc_query_enum
• function zt5550_hc_check_irq
• function zt5550_hc_enable_irq
• function zt5550_hc_disable_irq
• function zt5550_hc_init_one
• function zt5550_hc_remove_one
• function zt5550_init
• function zt5550_exit
• module init zt5550_init

Annotated Snippet

static struct pci_driver zt5550_hc_driver = {
	.name		= "zt5550_hc",
	.id_table	= zt5550_hc_pci_tbl,
	.probe		= zt5550_hc_init_one,
	.remove		= zt5550_hc_remove_one,
};

static int __init zt5550_init(void)
{
	struct resource *r;
	int rc;

	info(DRIVER_DESC " version: " DRIVER_VERSION);
	r = request_region(ENUM_PORT, 1, "#ENUM hotswap signal register");
	if (!r)
		return -EBUSY;

	rc = pci_register_driver(&zt5550_hc_driver);
	if (rc < 0)
		release_region(ENUM_PORT, 1);
	return rc;
}

static void __exit
zt5550_exit(void)
{
	pci_unregister_driver(&zt5550_hc_driver);
	release_region(ENUM_PORT, 1);
}

module_init(zt5550_init);
module_exit(zt5550_exit);

MODULE_AUTHOR(DRIVER_AUTHOR);
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE("GPL");
module_param(debug, bool, 0644);
MODULE_PARM_DESC(debug, "Debugging mode enabled or not");
module_param(poll, bool, 0644);
MODULE_PARM_DESC(poll, "#ENUM polling mode enabled or not");

Annotation

• Immediate include surface: `linux/module.h`, `linux/moduleparam.h`, `linux/init.h`, `linux/errno.h`, `linux/pci.h`, `linux/interrupt.h`, `linux/signal.h`, `cpci_hotplug.h`.
• Detected declarations: `function zt5550_hc_config`, `function zt5550_hc_cleanup`, `function zt5550_hc_query_enum`, `function zt5550_hc_check_irq`, `function zt5550_hc_enable_irq`, `function zt5550_hc_disable_irq`, `function zt5550_hc_init_one`, `function zt5550_hc_remove_one`, `function zt5550_init`, `function zt5550_exit`.
• Atlas domain: Representative Device Path / PCIe NVMe Storage Path.
• Implementation status: pattern 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.