drivers/media/pci/intel/ipu6/ipu6-dma.h

File Facts

System

Linux kernel

Corpus path

drivers/media/pci/intel/ipu6/ipu6-dma.h

Extension

.h

Size

1633 bytes

Lines

44

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.
• Touches IRQ or DMA behavior; this matters for the representative real-device path.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• linux/iova.h
• linux/scatterlist.h
• linux/types.h
• ipu6-bus.h

Detected Declarations

• struct ipu6_mmu_info
• struct ipu6_dma_mapping

Annotated Snippet

struct ipu6_dma_mapping {
	struct ipu6_mmu_info *mmu_info;
	struct iova_domain iovad;
};

void ipu6_dma_sync_single(struct ipu6_bus_device *sys, dma_addr_t dma_handle,
			  size_t size);
void ipu6_dma_sync_sg(struct ipu6_bus_device *sys, struct scatterlist *sglist,
		      int nents);
void ipu6_dma_sync_sgtable(struct ipu6_bus_device *sys, struct sg_table *sgt);
void *ipu6_dma_alloc(struct ipu6_bus_device *sys, size_t size,
		     dma_addr_t *dma_handle, gfp_t gfp,
		     unsigned long attrs);
void ipu6_dma_free(struct ipu6_bus_device *sys, size_t size, void *vaddr,
		   dma_addr_t dma_handle, unsigned long attrs);
int ipu6_dma_mmap(struct ipu6_bus_device *sys, struct vm_area_struct *vma,
		  void *addr, dma_addr_t iova, size_t size,
		  unsigned long attrs);
int ipu6_dma_map_sg(struct ipu6_bus_device *sys, struct scatterlist *sglist,
		    int nents, enum dma_data_direction dir,
		    unsigned long attrs);
void ipu6_dma_unmap_sg(struct ipu6_bus_device *sys, struct scatterlist *sglist,
		       int nents, enum dma_data_direction dir,
		       unsigned long attrs);
int ipu6_dma_map_sgtable(struct ipu6_bus_device *sys, struct sg_table *sgt,
			 enum dma_data_direction dir, unsigned long attrs);
void ipu6_dma_unmap_sgtable(struct ipu6_bus_device *sys, struct sg_table *sgt,
			    enum dma_data_direction dir, unsigned long attrs);
#endif /* IPU6_DMA_H */

Annotation

• Immediate include surface: `linux/iova.h`, `linux/scatterlist.h`, `linux/types.h`, `ipu6-bus.h`.
• Detected declarations: `struct ipu6_mmu_info`, `struct ipu6_dma_mapping`.
• Atlas domain: Driver Families / drivers/media.
• Implementation status: source implementation candidate.
• IRQ or DMA behavior appears here, which is relevant to the selected PCIe/NVMe device path.

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.