drivers/scsi/aic7xxx/scsi_message.h

File Facts

System

Linux kernel

Corpus path

drivers/scsi/aic7xxx/scsi_message.h

Extension

.h

Size

1308 bytes

Lines

41

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.

Dependency Surface

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

Detected Declarations

• No top-level syscall, struct, function, initcall, or export declaration detected by the generator.

Annotated Snippet

#define MSG_SAVEDATAPOINTER	0x02 /* O/O */
#define MSG_RESTOREPOINTERS	0x03 /* O/O */
#define MSG_DISCONNECT		0x04 /* O/O */
#define MSG_MESSAGE_REJECT	0x07 /* M/M */
#define MSG_NOOP		0x08 /* M/M */

/* Messages (2 byte) */
#define MSG_SIMPLE_Q_TAG	0x20 /* O/O */
#define MSG_IGN_WIDE_RESIDUE	0x23 /* O/O */

/* Identify message */		     /* M/M */	
#define MSG_IDENTIFYFLAG	0x80 
#define MSG_IDENTIFY_DISCFLAG	0x40 
#define MSG_IDENTIFY(lun, disc)	(((disc) ? 0xc0 : MSG_IDENTIFYFLAG) | (lun))
#define MSG_ISIDENTIFY(m)	((m) & MSG_IDENTIFYFLAG)
#define MSG_IDENTIFY_LUNMASK	0x3F 

/* Extended messages (opcode and length) */
#define MSG_EXT_SDTR_LEN	0x03

#define MSG_EXT_WDTR_LEN	0x02
#define MSG_EXT_WDTR_BUS_8_BIT	0x00
#define MSG_EXT_WDTR_BUS_16_BIT	0x01
#define MSG_EXT_WDTR_BUS_32_BIT	0x02 /* Deprecated in SPI3 */

#define MSG_EXT_PPR_LEN		0x06
#define	MSG_EXT_PPR_PCOMP_EN	0x80
#define	MSG_EXT_PPR_RTI		0x40
#define	MSG_EXT_PPR_RD_STRM	0x20
#define	MSG_EXT_PPR_WR_FLOW	0x10
#define	MSG_EXT_PPR_HOLD_MCS	0x08
#define	MSG_EXT_PPR_QAS_REQ	0x04
#define	MSG_EXT_PPR_DT_REQ	0x02
#define MSG_EXT_PPR_IU_REQ	0x01

Annotation

• 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.