include/linux/dma/dw.h

File Facts

System

Linux kernel

Corpus path

include/linux/dma/dw.h

Extension

.h

Size

1521 bytes

Lines

55

Domain

Core OS

Bucket

Core Kernel Interface

Inferred role

Core OS: implementation source

Status

source implementation candidate

Why This File Exists

Core operating-system implementation surface: boot, tasks, memory, VFS, syscall-facing interfaces, synchronization, credentials, and isolation.

• Core operating-system implementation surface: boot, tasks, memory, VFS, syscall-facing interfaces, synchronization, credentials, and isolation.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• linux/clk.h
• linux/device.h
• linux/dmaengine.h
• linux/platform_data/dma-dw.h

Detected Declarations

• struct dw_dma
• struct dw_dma_chip
• function dw_dma_probe
• function dw_dma_remove
• function idma32_dma_probe
• function idma32_dma_remove

Annotated Snippet

struct dw_dma_chip {
	struct device	*dev;
	int		id;
	int		irq;
	void __iomem	*regs;
	struct clk	*clk;
	struct dw_dma	*dw;

	const struct dw_dma_platform_data	*pdata;
};

/* Export to the platform drivers */
#if IS_ENABLED(CONFIG_DW_DMAC_CORE)
int dw_dma_probe(struct dw_dma_chip *chip);
int dw_dma_remove(struct dw_dma_chip *chip);
int idma32_dma_probe(struct dw_dma_chip *chip);
int idma32_dma_remove(struct dw_dma_chip *chip);
#else
static inline int dw_dma_probe(struct dw_dma_chip *chip) { return -ENODEV; }
static inline int dw_dma_remove(struct dw_dma_chip *chip) { return 0; }
static inline int idma32_dma_probe(struct dw_dma_chip *chip) { return -ENODEV; }
static inline int idma32_dma_remove(struct dw_dma_chip *chip) { return 0; }
#endif /* CONFIG_DW_DMAC_CORE */

#endif /* _DMA_DW_H */

Annotation

• Immediate include surface: `linux/clk.h`, `linux/device.h`, `linux/dmaengine.h`, `linux/platform_data/dma-dw.h`.
• Detected declarations: `struct dw_dma`, `struct dw_dma_chip`, `function dw_dma_probe`, `function dw_dma_remove`, `function idma32_dma_probe`, `function idma32_dma_remove`.
• Atlas domain: Core OS / Core Kernel Interface.
• 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.