drivers/s390/cio/orb.h

Source file repositories/reference/linux-study-clean/drivers/s390/cio/orb.h

File Facts

System
Linux kernel
Corpus path
drivers/s390/cio/orb.h
Extension
.h
Size
1924 bytes
Lines
96
Domain
Driver Families
Bucket
drivers/s390
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.

Dependency Surface

Detected Declarations

Annotated Snippet

struct cmd_orb {
	u32 intparm;	/* interruption parameter */
	u32 key:4;	/* flags, like key, suspend control, etc. */
	u32 spnd:1;	/* suspend control */
	u32 res1:1;	/* reserved */
	u32 mod:1;	/* modification control */
	u32 sync:1;	/* synchronize control */
	u32 fmt:1;	/* format control */
	u32 pfch:1;	/* prefetch control */
	u32 isic:1;	/* initial-status-interruption control */
	u32 alcc:1;	/* address-limit-checking control */
	u32 ssic:1;	/* suppress-suspended-interr. control */
	u32 res2:1;	/* reserved */
	u32 c64:1;	/* IDAW/QDIO 64 bit control  */
	u32 i2k:1;	/* IDAW 2/4kB block size control */
	u32 lpm:8;	/* logical path mask */
	u32 ils:1;	/* incorrect length */
	u32 zero:6;	/* reserved zeros */
	u32 orbx:1;	/* ORB extension control */
	dma32_t cpa;	/* channel program address */
}  __packed __aligned(4);

/*
 * Transport-mode operation request block
 */
struct tm_orb {
	u32 intparm;
	u32 key:4;
	u32:9;
	u32 b:1;
	u32:2;
	u32 lpm:8;
	u32:7;
	u32 x:1;
	dma32_t tcw;
	u32 prio:8;
	u32:8;
	u32 rsvpgm:8;
	u32:8;
	u32:32;
	u32:32;
	u32:32;
	u32:32;
}  __packed __aligned(4);

/*
 * eadm operation request block
 */
struct eadm_orb {
	u32 intparm;
	u32 key:4;
	u32:4;
	u32 compat1:1;
	u32 compat2:1;
	u32:21;
	u32 x:1;
	dma32_t aob;
	u32 css_prio:8;
	u32:8;
	u32 scm_prio:8;
	u32:8;
	u32:29;
	u32 fmt:3;
	u32:32;
	u32:32;
	u32:32;
}  __packed __aligned(4);

union orb {
	struct cmd_orb cmd;
	struct tm_orb tm;
	struct eadm_orb eadm;
}  __packed __aligned(4);

#endif /* S390_ORB_H */

Annotation

Implementation Notes