drivers/pci/hotplug/cpqphp_core.c

File Facts

System

Linux kernel

Corpus path

drivers/pci/hotplug/cpqphp_core.c

Extension

.c

Size

34538 bytes

Lines

1408

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.
• Uses kernel synchronization; read lock ordering, sleepability, and interrupt context assumptions before translating.
• Touches IRQ or DMA behavior; this matters for the representative real-device path.
• 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/moduleparam.h
• linux/kernel.h
• linux/types.h
• linux/proc_fs.h
• linux/slab.h
• linux/workqueue.h
• linux/pci.h
• linux/pci_hotplug.h
• linux/init.h
• linux/interrupt.h
• linux/uaccess.h
• cpqphp.h
• cpqphp_nvram.h

Detected Declarations

• function is_slot64bit
• function is_slot66mhz
• function tables
• function init_SERR
• function init_cpqhp_routing_table
• function pci_print_IRQ_route
• function ctrl_slot_cleanup
• function get_slot_mapping
• function cpqhp_set_attention_status
• function set_attention_status
• function process_SI
• function process_SS
• function hardware_test
• function get_power_status
• function get_attention_status
• function get_latch_status
• function get_adapter_status
• function ctrl_slot_setup
• function one_time_init
• function cpqhpc_probe
• function unload_cpqphpd
• function cpqhpc_init
• function cpqhpc_cleanup
• module init cpqhpc_init

Annotated Snippet

static struct pci_driver cpqhpc_driver = {
	.name =		"compaq_pci_hotplug",
	.id_table =	hpcd_pci_tbl,
	.probe =	cpqhpc_probe,
	/* remove:	cpqhpc_remove_one, */
};

static int __init cpqhpc_init(void)
{
	int result;

	cpqhp_debug = debug;

	info(DRIVER_DESC " version: " DRIVER_VERSION "\n");
	cpqhp_initialize_debugfs();
	result = pci_register_driver(&cpqhpc_driver);
	dbg("pci_register_driver = %d\n", result);
	return result;
}

static void __exit cpqhpc_cleanup(void)
{
	dbg("unload_cpqphpd()\n");
	unload_cpqphpd();

	dbg("pci_unregister_driver\n");
	pci_unregister_driver(&cpqhpc_driver);
	cpqhp_shutdown_debugfs();
}

module_init(cpqhpc_init);
module_exit(cpqhpc_cleanup);

Annotation

• Immediate include surface: `linux/module.h`, `linux/moduleparam.h`, `linux/kernel.h`, `linux/types.h`, `linux/proc_fs.h`, `linux/slab.h`, `linux/workqueue.h`, `linux/pci.h`.
• Detected declarations: `function is_slot64bit`, `function is_slot66mhz`, `function tables`, `function init_SERR`, `function init_cpqhp_routing_table`, `function pci_print_IRQ_route`, `function ctrl_slot_cleanup`, `function get_slot_mapping`, `function cpqhp_set_attention_status`, `function set_attention_status`.
• Atlas domain: Representative Device Path / PCIe NVMe Storage Path.
• Implementation status: pattern implementation candidate.
• Synchronization appears in or near this file; preserve lock ordering, sleepability, and interrupt-context constraints.
• IRQ or DMA behavior appears here, which is relevant to the selected PCIe/NVMe device path.

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.