drivers/char/agp/sis-agp.c

File Facts

System

Linux kernel

Corpus path

drivers/char/agp/sis-agp.c

Extension

.c

Size

11168 bytes

Lines

438

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/delay.h
• agp.h

Detected Declarations

• function sis_fetch_size
• function sis_tlbflush
• function sis_configure
• function sis_cleanup
• function sis_delayed_enable
• function for_each_pci_dev
• function sis_get_driver
• function agp_sis_probe
• function agp_sis_remove
• function agp_sis_resume
• function agp_sis_init
• function agp_sis_cleanup
• module init agp_sis_init

Annotated Snippet

static struct pci_driver agp_sis_pci_driver = {
	.name		= "agpgart-sis",
	.id_table	= agp_sis_pci_table,
	.probe		= agp_sis_probe,
	.remove		= agp_sis_remove,
	.driver.pm      = &agp_sis_pm_ops,
};

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

static void __exit agp_sis_cleanup(void)
{
	pci_unregister_driver(&agp_sis_pci_driver);
}

module_init(agp_sis_init);
module_exit(agp_sis_cleanup);

module_param(agp_sis_force_delay, bool, 0);
MODULE_PARM_DESC(agp_sis_force_delay,"forces sis delay hack");
module_param(agp_sis_agp_spec, int, 0);
MODULE_PARM_DESC(agp_sis_agp_spec,"0=force sis init, 1=force generic agp3 init, default: autodetect");
MODULE_DESCRIPTION("SiS AGPGART routines");
MODULE_LICENSE("GPL and additional rights");

Annotation

• Immediate include surface: `linux/module.h`, `linux/pci.h`, `linux/init.h`, `linux/agp_backend.h`, `linux/delay.h`, `agp.h`.
• Detected declarations: `function sis_fetch_size`, `function sis_tlbflush`, `function sis_configure`, `function sis_cleanup`, `function sis_delayed_enable`, `function for_each_pci_dev`, `function sis_get_driver`, `function agp_sis_probe`, `function agp_sis_remove`, `function agp_sis_resume`.
• 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.