include/linux/dma/hsu.h

File Facts

System

Linux kernel

Corpus path

include/linux/dma/hsu.h

Extension

.h

Size

1674 bytes

Lines

64

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/errno.h
• linux/kconfig.h
• linux/types.h
• linux/platform_data/dma-hsu.h

Detected Declarations

• struct device
• struct hsu_dma
• struct hsu_dma_chip
• function hsu_dma_get_status
• function hsu_dma_do_irq
• function hsu_dma_probe
• function hsu_dma_remove

Annotated Snippet

struct hsu_dma_chip {
	struct device			*dev;
	int				irq;
	void __iomem			*regs;
	unsigned int			length;
	unsigned int			offset;
	struct hsu_dma			*hsu;
};

#if IS_ENABLED(CONFIG_HSU_DMA)
/* Export to the internal users */
int hsu_dma_get_status(struct hsu_dma_chip *chip, unsigned short nr,
		       u32 *status);
int hsu_dma_do_irq(struct hsu_dma_chip *chip, unsigned short nr, u32 status);

/* Export to the platform drivers */
int hsu_dma_probe(struct hsu_dma_chip *chip);
int hsu_dma_remove(struct hsu_dma_chip *chip);
#else
static inline int hsu_dma_get_status(struct hsu_dma_chip *chip,
				     unsigned short nr, u32 *status)
{
	return 0;
}
static inline int hsu_dma_do_irq(struct hsu_dma_chip *chip, unsigned short nr,
				 u32 status)
{
	return 0;
}
static inline int hsu_dma_probe(struct hsu_dma_chip *chip) { return -ENODEV; }
static inline int hsu_dma_remove(struct hsu_dma_chip *chip) { return 0; }
#endif /* CONFIG_HSU_DMA */

#endif /* _DMA_HSU_H */

Annotation

• Immediate include surface: `linux/errno.h`, `linux/kconfig.h`, `linux/types.h`, `linux/platform_data/dma-hsu.h`.
• Detected declarations: `struct device`, `struct hsu_dma`, `struct hsu_dma_chip`, `function hsu_dma_get_status`, `function hsu_dma_do_irq`, `function hsu_dma_probe`, `function hsu_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.