drivers/gpu/drm/imagination/pvr_gem.c

File Facts

System

Linux kernel

Corpus path

drivers/gpu/drm/imagination/pvr_gem.c

Extension

.c

Size

12139 bytes

Lines

430

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.
• Allocates kernel memory; connect allocation flags and lifetime to context constraints.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• pvr_device.h
• pvr_gem.h
• pvr_vm.h
• drm/drm_gem.h
• drm/drm_prime.h
• linux/compiler.h
• linux/compiler_attributes.h
• linux/dma-buf.h
• linux/dma-direction.h
• linux/dma-mapping.h
• linux/err.h
• linux/gfp.h
• linux/iosys-map.h
• linux/log2.h
• linux/mutex.h
• linux/pagemap.h
• linux/property.h
• linux/refcount.h
• linux/scatterlist.h

Detected Declarations

• function pvr_gem_object_free
• function pvr_gem_mmap
• function pvr_gem_object_flags_validate
• function pvr_gem_object_into_handle
• function pvr_gem_object_from_handle
• function pvr_gem_object_vmap
• function pvr_gem_object_vunmap
• function pvr_gem_object_zero
• function pvr_gem_create_object
• function pvr_gem_object_create
• function pvr_gem_get_dma_addr

Annotated Snippet

if (offset >= accumulated_offset && offset < new_offset) {
			*dma_addr_out = sg_dma_address(sgl) +
					(offset - accumulated_offset);
			return 0;
		}

		accumulated_offset = new_offset;
	}

	return -EINVAL;
}

Annotation

• Immediate include surface: `pvr_device.h`, `pvr_gem.h`, `pvr_vm.h`, `drm/drm_gem.h`, `drm/drm_prime.h`, `linux/compiler.h`, `linux/compiler_attributes.h`, `linux/dma-buf.h`.
• Detected declarations: `function pvr_gem_object_free`, `function pvr_gem_mmap`, `function pvr_gem_object_flags_validate`, `function pvr_gem_object_into_handle`, `function pvr_gem_object_from_handle`, `function pvr_gem_object_vmap`, `function pvr_gem_object_vunmap`, `function pvr_gem_object_zero`, `function pvr_gem_create_object`, `function pvr_gem_object_create`.
• 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.