drivers/gpu/drm/etnaviv/etnaviv_cmdbuf.h

File Facts

System

Linux kernel

Corpus path

drivers/gpu/drm/etnaviv/etnaviv_cmdbuf.h

Extension

.h

Size

1346 bytes

Lines

47

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 device
• struct etnaviv_iommu_context
• struct etnaviv_vram_mapping
• struct etnaviv_cmdbuf_suballoc
• struct etnaviv_perfmon_request
• struct etnaviv_cmdbuf

Annotated Snippet

struct etnaviv_cmdbuf {
	/* suballocator this cmdbuf is allocated from */
	struct etnaviv_cmdbuf_suballoc *suballoc;
	/* cmdbuf properties */
	int suballoc_offset;
	void *vaddr;
	u32 size;
	u32 user_size;
};

struct etnaviv_cmdbuf_suballoc *
etnaviv_cmdbuf_suballoc_new(struct device *dev);
void etnaviv_cmdbuf_suballoc_destroy(struct etnaviv_cmdbuf_suballoc *suballoc);
int etnaviv_cmdbuf_suballoc_map(struct etnaviv_cmdbuf_suballoc *suballoc,
				struct etnaviv_iommu_context *context,
				struct etnaviv_vram_mapping *mapping,
				u32 memory_base);
void etnaviv_cmdbuf_suballoc_unmap(struct etnaviv_iommu_context *context,
				   struct etnaviv_vram_mapping *mapping);


int etnaviv_cmdbuf_init(struct etnaviv_cmdbuf_suballoc *suballoc,
		struct etnaviv_cmdbuf *cmdbuf, u32 size);
void etnaviv_cmdbuf_free(struct etnaviv_cmdbuf *cmdbuf);

u32 etnaviv_cmdbuf_get_va(struct etnaviv_cmdbuf *buf,
			  struct etnaviv_vram_mapping *mapping);
dma_addr_t etnaviv_cmdbuf_get_pa(struct etnaviv_cmdbuf *buf);

#endif /* __ETNAVIV_CMDBUF_H__ */

Annotation

• Immediate include surface: `linux/types.h`.
• Detected declarations: `struct device`, `struct etnaviv_iommu_context`, `struct etnaviv_vram_mapping`, `struct etnaviv_cmdbuf_suballoc`, `struct etnaviv_perfmon_request`, `struct etnaviv_cmdbuf`.
• 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.