drivers/pci/hotplug/rpaphp_slot.c

File Facts

System

Linux kernel

Corpus path

drivers/pci/hotplug/rpaphp_slot.c

Extension

.c

Size

2687 bytes

Lines

118

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.
• 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/kernel.h
• linux/module.h
• linux/sysfs.h
• linux/of.h
• linux/pci.h
• linux/string.h
• linux/slab.h
• asm/rtas.h
• rpaphp.h

Detected Declarations

• function Copyright
• function is_registered
• function list_for_each_entry
• function rpaphp_deregister_slot
• function rpaphp_register_slot
• function for_each_child_of_node_scoped
• export rpaphp_deregister_slot

Annotated Snippet

if (my_index == slot->index) {
			slotno = PCI_SLOT(PCI_DN(child)->devfn);
			break;
		}
	}

	retval = pci_hp_register(php_slot, slot->bus, slotno, slot->name);
	if (retval) {
		err("pci_hp_register failed with error %d\n", retval);
		return retval;
	}

	/* add slot to our internal list */
	list_add(&slot->rpaphp_slot_list, &rpaphp_slot_head);
	info("Slot [%s] registered\n", slot->name);
	return 0;
}

Annotation

• Immediate include surface: `linux/kernel.h`, `linux/module.h`, `linux/sysfs.h`, `linux/of.h`, `linux/pci.h`, `linux/string.h`, `linux/slab.h`, `asm/rtas.h`.
• Detected declarations: `function Copyright`, `function is_registered`, `function list_for_each_entry`, `function rpaphp_deregister_slot`, `function rpaphp_register_slot`, `function for_each_child_of_node_scoped`, `export rpaphp_deregister_slot`.
• 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.