drivers/gpu/drm/nouveau/nvkm/subdev/fb/gb100.c

File Facts

System

Linux kernel

Corpus path

drivers/gpu/drm/nouveau/nvkm/subdev/fb/gb100.c

Extension

.c

Size

1217 bytes

Lines

38

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

• priv.h
• nvhw/drf.h
• nvhw/ref/gb100/dev_hshub_base.h

Detected Declarations

• function Copyright
• function gb100_fb_new

Annotated Snippet

#include "priv.h"

#include <nvhw/drf.h>
#include <nvhw/ref/gb100/dev_hshub_base.h>

static void
gb100_fb_sysmem_flush_page_init(struct nvkm_fb *fb)
{
	const u32 addr_hi = upper_32_bits(fb->sysmem.flush_page_addr);
	const u32 addr_lo = lower_32_bits(fb->sysmem.flush_page_addr);
	const u32 hshub = DRF_LO(NV_PFB_HSHUB0);
	struct nvkm_device *device = fb->subdev.device;

	// Ensure that the address is within hardware limits
	WARN_ON(fb->sysmem.flush_page_addr > DMA_BIT_MASK(52));

	nvkm_wr32(device, hshub + NV_PFB_HSHUB_PCIE_FLUSH_SYSMEM_ADDR_HI, addr_hi);
	nvkm_wr32(device, hshub + NV_PFB_HSHUB_PCIE_FLUSH_SYSMEM_ADDR_LO, addr_lo);
	nvkm_wr32(device, hshub + NV_PFB_HSHUB_EG_PCIE_FLUSH_SYSMEM_ADDR_HI, addr_hi);
	nvkm_wr32(device, hshub + NV_PFB_HSHUB_EG_PCIE_FLUSH_SYSMEM_ADDR_LO, addr_lo);
}

static const struct nvkm_fb_func
gb100_fb = {
	.sysmem.flush_page_init = gb100_fb_sysmem_flush_page_init,
	.vidmem.size = ga102_fb_vidmem_size,
};

int
gb100_fb_new(struct nvkm_device *device, enum nvkm_subdev_type type, int inst, struct nvkm_fb **pfb)
{
	return r535_fb_new(&gb100_fb, device, type, inst, pfb);
}

Annotation

• Immediate include surface: `priv.h`, `nvhw/drf.h`, `nvhw/ref/gb100/dev_hshub_base.h`.
• Detected declarations: `function Copyright`, `function gb100_fb_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.