drivers/gpu/drm/xe/xe_guc_relay.h

File Facts

System

Linux kernel

Corpus path

drivers/gpu/drm/xe/xe_guc_relay.h

Extension

.h

Size

992 bytes

Lines

38

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
• linux/errno.h

Detected Declarations

• struct xe_guc_relay
• function xe_guc_relay_send_to_vf
• function xe_guc_relay_process_guc2pf

Annotated Snippet

#ifndef _XE_GUC_RELAY_H_
#define _XE_GUC_RELAY_H_

#include <linux/types.h>
#include <linux/errno.h>

struct xe_guc_relay;

int xe_guc_relay_init(struct xe_guc_relay *relay);

int xe_guc_relay_send_to_pf(struct xe_guc_relay *relay,
			    const u32 *msg, u32 len, u32 *buf, u32 buf_size);

int xe_guc_relay_process_guc2vf(struct xe_guc_relay *relay, const u32 *msg, u32 len);

#ifdef CONFIG_PCI_IOV
int xe_guc_relay_send_to_vf(struct xe_guc_relay *relay, u32 target,
			    const u32 *msg, u32 len, u32 *buf, u32 buf_size);
int xe_guc_relay_process_guc2pf(struct xe_guc_relay *relay, const u32 *msg, u32 len);
#else
static inline int xe_guc_relay_send_to_vf(struct xe_guc_relay *relay, u32 target,
					  const u32 *msg, u32 len, u32 *buf, u32 buf_size)
{
	return -ENODEV;
}
static inline int xe_guc_relay_process_guc2pf(struct xe_guc_relay *relay, const u32 *msg, u32 len)
{
	return -ENODEV;
}
#endif

#endif

Annotation

• Immediate include surface: `linux/types.h`, `linux/errno.h`.
• Detected declarations: `struct xe_guc_relay`, `function xe_guc_relay_send_to_vf`, `function xe_guc_relay_process_guc2pf`.
• 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.