include/uapi/linux/dma-heap.h

File Facts

System

Linux kernel

Corpus path

include/uapi/linux/dma-heap.h

Extension

.h

Size

1412 bytes

Lines

54

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/ioctl.h
• linux/types.h

Detected Declarations

• struct dma_heap_allocation_data

Annotated Snippet

struct dma_heap_allocation_data {
	__u64 len;
	__u32 fd;
	__u32 fd_flags;
	__u64 heap_flags;
};

#define DMA_HEAP_IOC_MAGIC		'H'

/**
 * DOC: DMA_HEAP_IOCTL_ALLOC - allocate memory from pool
 *
 * Takes a dma_heap_allocation_data struct and returns it with the fd field
 * populated with the dmabuf handle of the allocation.
 */
#define DMA_HEAP_IOCTL_ALLOC	_IOWR(DMA_HEAP_IOC_MAGIC, 0x0,\
				      struct dma_heap_allocation_data)

#endif /* _UAPI_LINUX_DMABUF_POOL_H */

Annotation

• Immediate include surface: `linux/ioctl.h`, `linux/types.h`.
• Detected declarations: `struct dma_heap_allocation_data`.
• 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.