drivers/misc/rp1/rp1_pci.c

File Facts

System

Linux kernel

Corpus path

drivers/misc/rp1/rp1_pci.c

Extension

.c

Size

7299 bytes

Lines

309

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.
• 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/err.h
• linux/interrupt.h
• linux/irq.h
• linux/irqchip/chained_irq.h
• linux/irqdomain.h
• linux/module.h
• linux/msi.h
• linux/of_platform.h
• linux/pci.h
• linux/platform_device.h

Detected Declarations

• struct rp1_dev
• function msix_cfg_set
• function msix_cfg_clr
• function rp1_mask_irq
• function rp1_unmask_irq
• function rp1_irq_set_type
• function rp1_chained_handle_irq
• function rp1_irq_xlate
• function rp1_irq_activate
• function rp1_irq_deactivate
• function rp1_unregister_interrupts
• function rp1_probe
• function rp1_remove

Annotated Snippet

static struct pci_driver rp1_driver = {
	.name		= KBUILD_MODNAME,
	.id_table	= dev_id_table,
	.probe		= rp1_probe,
	.remove		= rp1_remove,
};

module_pci_driver(rp1_driver);

MODULE_AUTHOR("Phil Elwell <phil@raspberrypi.com>");
MODULE_AUTHOR("Andrea della Porta <andrea.porta@suse.com>");
MODULE_DESCRIPTION("RaspberryPi RP1 misc device");
MODULE_LICENSE("GPL");

Annotation

• Immediate include surface: `linux/err.h`, `linux/interrupt.h`, `linux/irq.h`, `linux/irqchip/chained_irq.h`, `linux/irqdomain.h`, `linux/module.h`, `linux/msi.h`, `linux/of_platform.h`.
• Detected declarations: `struct rp1_dev`, `function msix_cfg_set`, `function msix_cfg_clr`, `function rp1_mask_irq`, `function rp1_unmask_irq`, `function rp1_irq_set_type`, `function rp1_chained_handle_irq`, `function rp1_irq_xlate`, `function rp1_irq_activate`, `function rp1_irq_deactivate`.
• Atlas domain: Driver Families / drivers/misc.
• Implementation status: pattern implementation candidate.
• 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.