drivers/video/fbdev/vfb.c

File Facts

System

Linux kernel

Corpus path

drivers/video/fbdev/vfb.c

Extension

.c

Size

13470 bytes

Lines

552

Domain

Driver Families

Bucket

drivers/video

Inferred role

Driver Families: exported/initcall integration point

Status

integration 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.
• Exports symbols or registers init work; inspect boot/module ordering and who consumes the exported contract.
• Touches IRQ or DMA behavior; this matters for the representative real-device path.
• 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/kernel.h
• linux/errno.h
• linux/string.h
• linux/mm.h
• linux/vmalloc.h
• linux/delay.h
• linux/interrupt.h
• linux/platform_device.h
• linux/fb.h
• linux/init.h

Detected Declarations

• function get_line_length
• function vfb_check_var
• function vfb_set_par
• function vfb_setcolreg
• function to
• function vfb_pan_display
• function vfb_mmap
• function vfb_setup
• function vfb_probe
• function vfb_remove
• function vfb_init
• function vfb_exit
• module init vfb_init

Annotated Snippet

module_init(vfb_init);

#ifdef MODULE
static void __exit vfb_exit(void)
{
	platform_device_unregister(vfb_device);
	platform_driver_unregister(&vfb_driver);
}

module_exit(vfb_exit);

MODULE_DESCRIPTION("Virtual Frame Buffer driver");
MODULE_LICENSE("GPL");
#endif				/* MODULE */

Annotation

• Immediate include surface: `linux/module.h`, `linux/kernel.h`, `linux/errno.h`, `linux/string.h`, `linux/mm.h`, `linux/vmalloc.h`, `linux/delay.h`, `linux/interrupt.h`.
• Detected declarations: `function get_line_length`, `function vfb_check_var`, `function vfb_set_par`, `function vfb_setcolreg`, `function to`, `function vfb_pan_display`, `function vfb_mmap`, `function vfb_setup`, `function vfb_probe`, `function vfb_remove`.
• Atlas domain: Driver Families / drivers/video.
• Implementation status: integration implementation candidate.
• IRQ or DMA behavior appears here, which is relevant to the selected PCIe/NVMe device path.

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.