drivers/firmware/arm_ffa/common.h

File Facts

System

Linux kernel

Corpus path

drivers/firmware/arm_ffa/common.h

Extension

.h

Size

637 bytes

Lines

30

Domain

Driver Families

Bucket

drivers/firmware

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/arm_ffa.h
• linux/arm-smccc.h
• linux/err.h

Detected Declarations

• function ffa_transport_init

Annotated Snippet

#ifndef _FFA_COMMON_H
#define _FFA_COMMON_H

#include <linux/arm_ffa.h>
#include <linux/arm-smccc.h>
#include <linux/err.h>

typedef struct arm_smccc_1_2_regs ffa_value_t;

typedef void (ffa_fn)(ffa_value_t, ffa_value_t *);

bool ffa_device_is_valid(struct ffa_device *ffa_dev);
void ffa_device_match_uuid(struct ffa_device *ffa_dev, const uuid_t *uuid);

#ifdef CONFIG_ARM_FFA_SMCCC
int ffa_transport_init(ffa_fn **invoke_ffa_fn);
#else
static inline int ffa_transport_init(ffa_fn **invoke_ffa_fn)
{
	return -EOPNOTSUPP;
}
#endif

#endif /* _FFA_COMMON_H */

Annotation

• Immediate include surface: `linux/arm_ffa.h`, `linux/arm-smccc.h`, `linux/err.h`.
• Detected declarations: `function ffa_transport_init`.
• Atlas domain: Driver Families / drivers/firmware.
• 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.