drivers/gpu/drm/i915/gvt/mmio.h

File Facts

System

Linux kernel

Corpus path

drivers/gpu/drm/i915/gvt/mmio.h

Extension

.h

Size

3766 bytes

Lines

109

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 intel_gvt
• struct intel_vgpu
• struct intel_gvt_mmio_info

Annotated Snippet

struct intel_gvt_mmio_info {
	u32 offset;
	u64 ro_mask;
	gvt_mmio_func read;
	gvt_mmio_func write;
	struct hlist_node node;
};

const struct intel_engine_cs *
intel_gvt_render_mmio_to_engine(struct intel_gvt *gvt, unsigned int reg);
unsigned long intel_gvt_get_device_type(struct intel_gvt *gvt);

int intel_gvt_setup_mmio_info(struct intel_gvt *gvt);
void intel_gvt_clean_mmio_info(struct intel_gvt *gvt);
int intel_gvt_for_each_tracked_mmio(struct intel_gvt *gvt,
	int (*handler)(struct intel_gvt *gvt, u32 offset, void *data),
	void *data);

struct intel_gvt_mmio_info *intel_gvt_find_mmio_info(struct intel_gvt *gvt,
						  unsigned int offset);

int intel_vgpu_init_mmio(struct intel_vgpu *vgpu);
void intel_vgpu_reset_mmio(struct intel_vgpu *vgpu, bool dmlr);
void intel_vgpu_clean_mmio(struct intel_vgpu *vgpu);

int intel_vgpu_gpa_to_mmio_offset(struct intel_vgpu *vgpu, u64 gpa);

int intel_vgpu_emulate_mmio_read(struct intel_vgpu *vgpu, u64 pa,
				void *p_data, unsigned int bytes);
int intel_vgpu_emulate_mmio_write(struct intel_vgpu *vgpu, u64 pa,
				void *p_data, unsigned int bytes);

int intel_vgpu_default_mmio_read(struct intel_vgpu *vgpu, unsigned int offset,
				 void *p_data, unsigned int bytes);
int intel_vgpu_default_mmio_write(struct intel_vgpu *vgpu, unsigned int offset,
				  void *p_data, unsigned int bytes);

int intel_vgpu_mmio_reg_rw(struct intel_vgpu *vgpu, unsigned int offset,
			   void *pdata, unsigned int bytes, bool is_read);

int intel_vgpu_mask_mmio_write(struct intel_vgpu *vgpu, unsigned int offset,
				  void *p_data, unsigned int bytes);

void intel_gvt_restore_fence(struct intel_gvt *gvt);
void intel_gvt_restore_mmio(struct intel_gvt *gvt);

#endif

Annotation

• Immediate include surface: `linux/types.h`.
• Detected declarations: `struct intel_gvt`, `struct intel_vgpu`, `struct intel_gvt_mmio_info`.
• 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.