drivers/gpu/drm/nouveau/nvkm/subdev/mmu/gm20b.c

File Facts

System

Linux kernel

Corpus path

drivers/gpu/drm/nouveau/nvkm/subdev/mmu/gm20b.c

Extension

.c

Size

2049 bytes

Lines

57

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

• mem.h
• vmm.h
• subdev/fb.h
• nvif/class.h

Detected Declarations

• function gm20b_mmu_new

Annotated Snippet

#include "mem.h"
#include "vmm.h"

#include <subdev/fb.h>

#include <nvif/class.h>

static const struct nvkm_mmu_func
gm20b_mmu = {
	.dma_bits = 40,
	.mmu = {{ -1, -1, NVIF_CLASS_MMU_GF100}},
	.mem = {{ -1, -1, NVIF_CLASS_MEM_GF100}, .umap = gf100_mem_map },
	.vmm = {{ -1,  0, NVIF_CLASS_VMM_GM200}, gm20b_vmm_new },
	.kind = gm200_mmu_kind,
	.kind_sys = true,
};

static const struct nvkm_mmu_func
gm20b_mmu_fixed = {
	.dma_bits = 40,
	.mmu = {{ -1, -1, NVIF_CLASS_MMU_GF100}},
	.mem = {{ -1, -1, NVIF_CLASS_MEM_GF100}, .umap = gf100_mem_map },
	.vmm = {{ -1, -1, NVIF_CLASS_VMM_GM200}, gm20b_vmm_new_fixed },
	.kind = gm200_mmu_kind,
	.kind_sys = true,
};

int
gm20b_mmu_new(struct nvkm_device *device, enum nvkm_subdev_type type, int inst,
	      struct nvkm_mmu **pmmu)
{
	if (device->fb->page)
		return nvkm_mmu_new_(&gm20b_mmu_fixed, device, type, inst, pmmu);
	return nvkm_mmu_new_(&gm20b_mmu, device, type, inst, pmmu);
}

Annotation

• Immediate include surface: `mem.h`, `vmm.h`, `subdev/fb.h`, `nvif/class.h`.
• Detected declarations: `function gm20b_mmu_new`.
• 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.