drivers/media/pci/cobalt/cobalt-omnitek.h

File Facts

System

Linux kernel

Corpus path

drivers/media/pci/cobalt/cobalt-omnitek.h

Extension

.h

Size

1372 bytes

Lines

51

Domain

Driver Families

Bucket

drivers/media

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/scatterlist.h
• cobalt-driver.h

Detected Declarations

• struct sg_dma_descriptor

Annotated Snippet

struct sg_dma_descriptor {
	u32 pci_l;
	u32 pci_h;

	u32 local;
	u32 reserved0;

	u32 next_l;
	u32 next_h;

	u32 bytes;
	u32 reserved1;
};

int omni_sg_dma_init(struct cobalt *cobalt);
void omni_sg_dma_abort_channel(struct cobalt_stream *s);
void omni_sg_dma_start(struct cobalt_stream *s, struct sg_dma_desc_info *desc);
bool is_dma_done(struct cobalt_stream *s);

int descriptor_list_create(struct cobalt *cobalt,
	struct scatterlist *scatter_list, bool to_pci, unsigned sglen,
	unsigned size, unsigned width, unsigned stride,
	struct sg_dma_desc_info *desc);

void descriptor_list_chain(struct sg_dma_desc_info *this,
			   struct sg_dma_desc_info *next);
void descriptor_list_loopback(struct sg_dma_desc_info *desc);
void descriptor_list_end_of_chain(struct sg_dma_desc_info *desc);

void *descriptor_list_allocate(struct sg_dma_desc_info *desc, size_t bytes);
void descriptor_list_free(struct sg_dma_desc_info *desc);

void descriptor_list_interrupt_enable(struct sg_dma_desc_info *desc);
void descriptor_list_interrupt_disable(struct sg_dma_desc_info *desc);

#endif

Annotation

• Immediate include surface: `linux/scatterlist.h`, `cobalt-driver.h`.
• Detected declarations: `struct sg_dma_descriptor`.
• Atlas domain: Driver Families / drivers/media.
• 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.