drivers/scsi/fnic/rq_enet_desc.h

File Facts

System

Linux kernel

Corpus path

drivers/scsi/fnic/rq_enet_desc.h

Extension

.h

Size

1273 bytes

Lines

47

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

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

Detected Declarations

• struct rq_enet_desc
• enum rq_enet_type_types
• function rq_enet_desc_enc
• function rq_enet_desc_dec

Annotated Snippet

struct rq_enet_desc {
	__le64 address;
	__le16 length_type;
	u8 reserved[6];
};

enum rq_enet_type_types {
	RQ_ENET_TYPE_ONLY_SOP = 0,
	RQ_ENET_TYPE_NOT_SOP = 1,
	RQ_ENET_TYPE_RESV2 = 2,
	RQ_ENET_TYPE_RESV3 = 3,
};

#define RQ_ENET_ADDR_BITS		64
#define RQ_ENET_LEN_BITS		14
#define RQ_ENET_LEN_MASK		((1 << RQ_ENET_LEN_BITS) - 1)
#define RQ_ENET_TYPE_BITS		2
#define RQ_ENET_TYPE_MASK		((1 << RQ_ENET_TYPE_BITS) - 1)

static inline void rq_enet_desc_enc(struct rq_enet_desc *desc,
	u64 address, u8 type, u16 length)
{
	desc->address = cpu_to_le64(address);
	desc->length_type = cpu_to_le16((length & RQ_ENET_LEN_MASK) |
		((type & RQ_ENET_TYPE_MASK) << RQ_ENET_LEN_BITS));
}

static inline void rq_enet_desc_dec(struct rq_enet_desc *desc,
	u64 *address, u8 *type, u16 *length)
{
	*address = le64_to_cpu(desc->address);
	*length = le16_to_cpu(desc->length_type) & RQ_ENET_LEN_MASK;
	*type = (u8)((le16_to_cpu(desc->length_type) >> RQ_ENET_LEN_BITS) &
		RQ_ENET_TYPE_MASK);
}

#endif /* _RQ_ENET_DESC_H_ */

Annotation

• Detected declarations: `struct rq_enet_desc`, `enum rq_enet_type_types`, `function rq_enet_desc_enc`, `function rq_enet_desc_dec`.
• 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.