drivers/char/agp/efficeon-agp.c

File Facts

System

Linux kernel

Corpus path

drivers/char/agp/efficeon-agp.c

Extension

.c

Size

12499 bytes

Lines

471

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/module.h
• linux/pci.h
• linux/init.h
• linux/agp_backend.h
• linux/gfp.h
• linux/page-flags.h
• linux/mm.h
• asm/cpuid/api.h
• agp.h
• intel-agp.h

Detected Declarations

• function efficeon_mask_memory
• function efficeon_fetch_size
• function efficeon_tlbflush
• function efficeon_cleanup
• function efficeon_configure
• function efficeon_free_gatt_table
• function efficeon_create_gatt_table
• function efficeon_insert_memory
• function efficeon_remove_memory
• function agp_efficeon_probe
• function agp_efficeon_remove
• function agp_efficeon_resume
• function agp_efficeon_init
• function agp_efficeon_cleanup
• module init agp_efficeon_init

Annotated Snippet

static struct pci_driver agp_efficeon_pci_driver = {
	.name		= "agpgart-efficeon",
	.id_table	= agp_efficeon_pci_table,
	.probe		= agp_efficeon_probe,
	.remove		= agp_efficeon_remove,
	.driver.pm	= &agp_efficeon_pm_ops,
};

static int __init agp_efficeon_init(void)
{
	static int agp_initialised=0;

	if (agp_off)
		return -EINVAL;

	if (agp_initialised == 1)
		return 0;
	agp_initialised=1;

	return pci_register_driver(&agp_efficeon_pci_driver);
}

static void __exit agp_efficeon_cleanup(void)
{
	pci_unregister_driver(&agp_efficeon_pci_driver);
}

module_init(agp_efficeon_init);
module_exit(agp_efficeon_cleanup);

MODULE_AUTHOR("Carlos Puchol <cpglinux@puchol.com>");
MODULE_DESCRIPTION("Transmeta's Efficeon AGPGART driver");
MODULE_LICENSE("GPL and additional rights");

Annotation

• Immediate include surface: `linux/module.h`, `linux/pci.h`, `linux/init.h`, `linux/agp_backend.h`, `linux/gfp.h`, `linux/page-flags.h`, `linux/mm.h`, `asm/cpuid/api.h`.
• Detected declarations: `function efficeon_mask_memory`, `function efficeon_fetch_size`, `function efficeon_tlbflush`, `function efficeon_cleanup`, `function efficeon_configure`, `function efficeon_free_gatt_table`, `function efficeon_create_gatt_table`, `function efficeon_insert_memory`, `function efficeon_remove_memory`, `function agp_efficeon_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.