drivers/char/agp/ati-agp.c

File Facts

System

Linux kernel

Corpus path

drivers/char/agp/ati-agp.c

Extension

.c

Size

14715 bytes

Lines

577

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/string.h
• linux/slab.h
• linux/agp_backend.h
• asm/agp.h
• asm/set_memory.h
• agp.h

Detected Declarations

• struct ati_page_map
• function ati_create_page_map
• function ati_free_page_map
• function ati_free_gatt_pages
• function ati_create_gatt_pages
• function is_r200
• function ati_fetch_size
• function ati_tlbflush
• function ati_cleanup
• function ati_configure
• function agp_ati_resume
• function ati_insert_memory
• function ati_remove_memory
• function ati_create_gatt_table
• function ati_free_gatt_table
• function agp_ati_probe
• function agp_ati_remove
• function agp_ati_init
• function agp_ati_cleanup
• module init agp_ati_init

Annotated Snippet

static struct pci_driver agp_ati_pci_driver = {
	.name		= "agpgart-ati",
	.id_table	= agp_ati_pci_table,
	.probe		= agp_ati_probe,
	.remove		= agp_ati_remove,
	.driver.pm	= &agp_ati_pm_ops,
};

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

static void __exit agp_ati_cleanup(void)
{
	pci_unregister_driver(&agp_ati_pci_driver);
}

module_init(agp_ati_init);
module_exit(agp_ati_cleanup);

MODULE_AUTHOR("Dave Jones");
MODULE_DESCRIPTION("ATi AGPGART routines");
MODULE_LICENSE("GPL and additional rights");

Annotation

• Immediate include surface: `linux/types.h`, `linux/module.h`, `linux/pci.h`, `linux/init.h`, `linux/string.h`, `linux/slab.h`, `linux/agp_backend.h`, `asm/agp.h`.
• Detected declarations: `struct ati_page_map`, `function ati_create_page_map`, `function ati_free_page_map`, `function ati_free_gatt_pages`, `function ati_create_gatt_pages`, `function is_r200`, `function ati_fetch_size`, `function ati_tlbflush`, `function ati_cleanup`, `function ati_configure`.
• 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.