drivers/char/agp/nvidia-agp.c

File Facts

System

Linux kernel

Corpus path

drivers/char/agp/nvidia-agp.c

Extension

.c

Size

12755 bytes

Lines

470

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/page-flags.h
• linux/mm.h
• linux/jiffies.h
• asm/msr.h
• agp.h

Detected Declarations

• function nvidia_fetch_size
• function nvidia_init_iorr
• function nvidia_configure
• function nvidia_cleanup
• function nvidia_insert_memory
• function nvidia_remove_memory
• function nvidia_tlbflush
• function agp_nvidia_probe
• function agp_nvidia_remove
• function agp_nvidia_resume
• function agp_nvidia_init
• function agp_nvidia_cleanup
• module init agp_nvidia_init

Annotated Snippet

static struct pci_driver agp_nvidia_pci_driver = {
	.name		= "agpgart-nvidia",
	.id_table	= agp_nvidia_pci_table,
	.probe		= agp_nvidia_probe,
	.remove		= agp_nvidia_remove,
	.driver.pm	= &agp_nvidia_pm_ops,
};

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

static void __exit agp_nvidia_cleanup(void)
{
	pci_unregister_driver(&agp_nvidia_pci_driver);
	pci_dev_put(nvidia_private.dev_1);
	pci_dev_put(nvidia_private.dev_2);
	pci_dev_put(nvidia_private.dev_3);
}

module_init(agp_nvidia_init);
module_exit(agp_nvidia_cleanup);

MODULE_DESCRIPTION("Nvidia AGPGART routines");
MODULE_LICENSE("GPL and additional rights");
MODULE_AUTHOR("NVIDIA Corporation");

Annotation

• Immediate include surface: `linux/module.h`, `linux/pci.h`, `linux/init.h`, `linux/agp_backend.h`, `linux/page-flags.h`, `linux/mm.h`, `linux/jiffies.h`, `asm/msr.h`.
• Detected declarations: `function nvidia_fetch_size`, `function nvidia_init_iorr`, `function nvidia_configure`, `function nvidia_cleanup`, `function nvidia_insert_memory`, `function nvidia_remove_memory`, `function nvidia_tlbflush`, `function agp_nvidia_probe`, `function agp_nvidia_remove`, `function agp_nvidia_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.