samples/vfio-mdev/mdpy-fb.c

File Facts

System

Linux kernel

Corpus path

samples/vfio-mdev/mdpy-fb.c

Extension

.c

Size

5567 bytes

Lines

234

Domain

Support Tooling And Documentation

Bucket

samples

Inferred role

Support Tooling And Documentation: operation-table or driver-model contract

Status

pattern implementation candidate

Why This File Exists

Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.

• Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.
• Defines an operation table; this is where Linux turns generic core objects into subsystem-specific behavior.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• linux/errno.h
• linux/fb.h
• linux/io.h
• linux/pci.h
• linux/module.h
• drm/drm_fourcc.h
• mdpy-defs.h

Detected Declarations

• struct mdpy_fb_par
• function mdpy_fb_setcolreg
• function mdpy_fb_destroy
• function mdpy_fb_probe
• function mdpy_fb_remove
• function mdpy_fb_init
• module init mdpy_fb_init

Annotated Snippet

static struct pci_driver mdpy_fb_pci_driver = {
	.name		= "mdpy-fb",
	.id_table	= mdpy_fb_pci_table,
	.probe		= mdpy_fb_probe,
	.remove		= mdpy_fb_remove,
};

static int __init mdpy_fb_init(void)
{
	int ret;

	ret = pci_register_driver(&mdpy_fb_pci_driver);
	if (ret)
		return ret;

	return 0;
}

module_init(mdpy_fb_init);

MODULE_DEVICE_TABLE(pci, mdpy_fb_pci_table);
MODULE_DESCRIPTION("Framebuffer driver for mdpy (mediated virtual pci display device)");
MODULE_LICENSE("GPL v2");

Annotation

• Immediate include surface: `linux/errno.h`, `linux/fb.h`, `linux/io.h`, `linux/pci.h`, `linux/module.h`, `drm/drm_fourcc.h`, `mdpy-defs.h`.
• Detected declarations: `struct mdpy_fb_par`, `function mdpy_fb_setcolreg`, `function mdpy_fb_destroy`, `function mdpy_fb_probe`, `function mdpy_fb_remove`, `function mdpy_fb_init`, `module init mdpy_fb_init`.
• Atlas domain: Support Tooling And Documentation / samples.
• 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.