drivers/gpu/drm/nouveau/include/nvkm/subdev/vga.h

File Facts

System

Linux kernel

Corpus path

drivers/gpu/drm/nouveau/include/nvkm/subdev/vga.h

Extension

.h

Size

1075 bytes

Lines

30

Domain

Driver Families

Bucket

drivers/gpu

Inferred role

Driver Families: implementation source

Status

source 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 or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• core/subdev.h

Detected Declarations

• No top-level syscall, struct, function, initcall, or export declaration detected by the generator.

Annotated Snippet

#ifndef __NOUVEAU_VGA_H__
#define __NOUVEAU_VGA_H__
#include <core/subdev.h>

/* access to various legacy io ports */
u8   nvkm_rdport(struct nvkm_device *, int head, u16 port);
void nvkm_wrport(struct nvkm_device *, int head, u16 port, u8 value);

/* VGA Sequencer */
u8   nvkm_rdvgas(struct nvkm_device *, int head, u8 index);
void nvkm_wrvgas(struct nvkm_device *, int head, u8 index, u8 value);

/* VGA Graphics */
u8   nvkm_rdvgag(struct nvkm_device *, int head, u8 index);
void nvkm_wrvgag(struct nvkm_device *, int head, u8 index, u8 value);

/* VGA CRTC */
u8   nvkm_rdvgac(struct nvkm_device *, int head, u8 index);
void nvkm_wrvgac(struct nvkm_device *, int head, u8 index, u8 value);

/* VGA indexed port access dispatcher */
u8   nvkm_rdvgai(struct nvkm_device *, int head, u16 port, u8 index);
void nvkm_wrvgai(struct nvkm_device *, int head, u16 port, u8 index, u8 value);

bool nvkm_lockvgac(struct nvkm_device *, bool lock);
u8   nvkm_rdvgaowner(struct nvkm_device *);
void nvkm_wrvgaowner(struct nvkm_device *, u8);
#endif

Annotation

• Immediate include surface: `core/subdev.h`.
• Atlas domain: Driver Families / drivers/gpu.
• Implementation status: source 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.