drivers/gpu/drm/i915/gt/gen2_engine_cs.h

File Facts

System

Linux kernel

Corpus path

drivers/gpu/drm/i915/gt/gen2_engine_cs.h

Extension

.h

Size

1121 bytes

Lines

37

Domain

Driver Families

Bucket

drivers/gpu

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/types.h

Detected Declarations

• struct i915_request
• struct intel_engine_cs

Annotated Snippet

#ifndef __GEN2_ENGINE_CS_H__
#define __GEN2_ENGINE_CS_H__

#include <linux/types.h>

struct i915_request;
struct intel_engine_cs;

int gen2_emit_flush(struct i915_request *rq, u32 mode);
int gen4_emit_flush_rcs(struct i915_request *rq, u32 mode);
int gen4_emit_flush_vcs(struct i915_request *rq, u32 mode);

u32 *gen2_emit_breadcrumb(struct i915_request *rq, u32 *cs);
u32 *gen5_emit_breadcrumb(struct i915_request *rq, u32 *cs);

int i830_emit_bb_start(struct i915_request *rq,
		       u64 offset, u32 len,
		       unsigned int dispatch_flags);
int gen2_emit_bb_start(struct i915_request *rq,
		       u64 offset, u32 len,
		       unsigned int dispatch_flags);
int gen4_emit_bb_start(struct i915_request *rq,
		       u64 offset, u32 length,
		       unsigned int dispatch_flags);

void gen2_irq_enable(struct intel_engine_cs *engine);
void gen2_irq_disable(struct intel_engine_cs *engine);
void gen5_irq_enable(struct intel_engine_cs *engine);
void gen5_irq_disable(struct intel_engine_cs *engine);

#endif /* __GEN2_ENGINE_CS_H__ */

Annotation

• Immediate include surface: `linux/types.h`.
• Detected declarations: `struct i915_request`, `struct intel_engine_cs`.
• Atlas domain: Driver Families / drivers/gpu.
• 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.