drivers/staging/media/ipu3/ipu3-dmamap.h

File Facts

System

Linux kernel

Corpus path

drivers/staging/media/ipu3/ipu3-dmamap.h

Extension

.h

Size

680 bytes

Lines

23

Domain

Driver Families

Bucket

drivers/staging

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

• No C-style include directives detected by the generator.

Detected Declarations

• struct imgu_device
• struct scatterlist

Annotated Snippet

#ifndef __IPU3_DMAMAP_H
#define __IPU3_DMAMAP_H

struct imgu_device;
struct scatterlist;

void *imgu_dmamap_alloc(struct imgu_device *imgu, struct imgu_css_map *map,
			size_t len);
void imgu_dmamap_free(struct imgu_device *imgu, struct imgu_css_map *map);

int imgu_dmamap_map_sg(struct imgu_device *imgu, struct scatterlist *sglist,
		       int nents, struct imgu_css_map *map);
void imgu_dmamap_unmap(struct imgu_device *imgu, struct imgu_css_map *map);

int imgu_dmamap_init(struct imgu_device *imgu);
void imgu_dmamap_exit(struct imgu_device *imgu);

#endif

Annotation

• Detected declarations: `struct imgu_device`, `struct scatterlist`.
• Atlas domain: Driver Families / drivers/staging.
• 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.