drivers/scsi/qla2xxx/qla_dsd.h

File Facts

System

Linux kernel

Corpus path

drivers/scsi/qla2xxx/qla_dsd.h

Extension

.h

Size

704 bytes

Lines

33

Domain

Driver Families

Bucket

drivers/scsi

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

• linux/unaligned.h

Detected Declarations

• struct dsd32
• struct dsd64
• function append_dsd32
• function append_dsd64

Annotated Snippet

struct dsd32 {
	__le32 address;
	__le32 length;
};

static inline void append_dsd32(struct dsd32 **dsd, struct scatterlist *sg)
{
	put_unaligned_le32(sg_dma_address(sg), &(*dsd)->address);
	put_unaligned_le32(sg_dma_len(sg),     &(*dsd)->length);
	(*dsd)++;
}

/* 64-bit data segment descriptor (12 bytes) */
struct dsd64 {
	__le64 address;
	__le32 length;
} __packed;

static inline void append_dsd64(struct dsd64 **dsd, struct scatterlist *sg)
{
	put_unaligned_le64(sg_dma_address(sg), &(*dsd)->address);
	put_unaligned_le32(sg_dma_len(sg),     &(*dsd)->length);
	(*dsd)++;
}

#endif

Annotation

• Immediate include surface: `linux/unaligned.h`.
• Detected declarations: `struct dsd32`, `struct dsd64`, `function append_dsd32`, `function append_dsd64`.
• Atlas domain: Driver Families / drivers/scsi.
• 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.