drivers/char/agp/via-agp.c

File Facts

System

Linux kernel

Corpus path

drivers/char/agp/via-agp.c

Extension

.c

Size

14000 bytes

Lines

581

Domain

Driver Families

Bucket

drivers/char

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.
• 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/types.h
• linux/module.h
• linux/pci.h
• linux/init.h
• linux/agp_backend.h
• agp.h

Detected Declarations

• function via_fetch_size
• function via_configure
• function via_cleanup
• function via_tlbflush
• function via_fetch_size_agp3
• function via_configure_agp3
• function via_cleanup_agp3
• function via_tlbflush_agp3
• function check_via_agp3
• function agp_via_probe
• function agp_via_remove
• function agp_via_resume
• function agp_via_init
• function agp_via_cleanup
• module init agp_via_init

Annotated Snippet

static struct pci_driver agp_via_pci_driver = {
	.name		= "agpgart-via",
	.id_table	= agp_via_pci_table,
	.probe		= agp_via_probe,
	.remove		= agp_via_remove,
	.driver.pm      = &agp_via_pm_ops,
};


static int __init agp_via_init(void)
{
	if (agp_off)
		return -EINVAL;
	return pci_register_driver(&agp_via_pci_driver);
}

static void __exit agp_via_cleanup(void)
{
	pci_unregister_driver(&agp_via_pci_driver);
}

module_init(agp_via_init);
module_exit(agp_via_cleanup);

MODULE_DESCRIPTION("VIA AGPGART routines");
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Dave Jones");

Annotation

• Immediate include surface: `linux/types.h`, `linux/module.h`, `linux/pci.h`, `linux/init.h`, `linux/agp_backend.h`, `agp.h`.
• Detected declarations: `function via_fetch_size`, `function via_configure`, `function via_cleanup`, `function via_tlbflush`, `function via_fetch_size_agp3`, `function via_configure_agp3`, `function via_cleanup_agp3`, `function via_tlbflush_agp3`, `function check_via_agp3`, `function agp_via_probe`.
• Atlas domain: Driver Families / drivers/char.
• 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.