include/uapi/linux/idxd.h

File Facts

System

Linux kernel

Corpus path

include/uapi/linux/idxd.h

Extension

.h

Size

8891 bytes

Lines

396

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/types.h

Detected Declarations

• struct dsa_hw_desc
• struct iax_hw_desc
• struct dsa_raw_desc
• struct dsa_completion_record
• struct dsa_raw_completion_record
• struct iax_completion_record
• struct iax_raw_completion_record
• enum idxd_scmd_stat
• enum dsa_opcode
• enum iax_opcode
• enum dsa_completion_status
• enum iax_completion_status

Annotated Snippet

struct dsa_hw_desc {
	__u32	pasid:20;
	__u32	rsvd:11;
	__u32	priv:1;
	__u32	flags:24;
	__u32	opcode:8;
	__u64	completion_addr;
	union {
		__u64	src_addr;
		__u64	rdback_addr;
		__u64	pattern;
		__u64	desc_list_addr;
		__u64	pattern_lower;
		__u64	transl_fetch_addr;
	};
	union {
		__u64	dst_addr;
		__u64	rdback_addr2;
		__u64	src2_addr;
		__u64	comp_pattern;
	};
	union {
		__u32	xfer_size;
		__u32	desc_count;
		__u32	region_size;
	};
	__u16	int_handle;
	__u16	rsvd1;
	union {
		__u8		expected_res;
		/* create delta record */
		struct {
			__u64	delta_addr;
			__u32	max_delta_size;
			__u32	delt_rsvd;
			__u8	expected_res_mask;
		};
		__u32	delta_rec_size;
		__u64	dest2;
		/* CRC */
		struct {
			__u32	crc_seed;
			__u32	crc_rsvd;
			__u64	seed_addr;
		};
		/* DIF check or strip */
		struct {
			__u8	src_dif_flags;
			__u8	dif_chk_res;
			__u8	dif_chk_flags;
			__u8	dif_chk_res2[5];
			__u32	chk_ref_tag_seed;
			__u16	chk_app_tag_mask;
			__u16	chk_app_tag_seed;
		};
		/* DIF insert */
		struct {
			__u8	dif_ins_res;
			__u8	dest_dif_flag;
			__u8	dif_ins_flags;
			__u8	dif_ins_res2[13];
			__u32	ins_ref_tag_seed;
			__u16	ins_app_tag_mask;
			__u16	ins_app_tag_seed;
		};
		/* DIF update */
		struct {
			__u8	src_upd_flags;
			__u8	upd_dest_flags;
			__u8	dif_upd_flags;
			__u8	dif_upd_res[5];
			__u32	src_ref_tag_seed;
			__u16	src_app_tag_mask;
			__u16	src_app_tag_seed;
			__u32	dest_ref_tag_seed;
			__u16	dest_app_tag_mask;
			__u16	dest_app_tag_seed;
		};

		/* Fill */
		__u64	pattern_upper;

		/* Translation fetch */
		struct {
			__u64	transl_fetch_res;
			__u32	region_stride;
		};

		/* DIX generate */
		struct {

Annotation

• Immediate include surface: `linux/types.h`.
• Detected declarations: `struct dsa_hw_desc`, `struct iax_hw_desc`, `struct dsa_raw_desc`, `struct dsa_completion_record`, `struct dsa_raw_completion_record`, `struct iax_completion_record`, `struct iax_raw_completion_record`, `enum idxd_scmd_stat`, `enum dsa_opcode`, `enum iax_opcode`.
• 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.