drivers/gpu/drm/nouveau/nvif/mmu.c

Source file repositories/reference/linux-study-clean/drivers/gpu/drm/nouveau/nvif/mmu.c

File Facts

System
Linux kernel
Corpus path
drivers/gpu/drm/nouveau/nvif/mmu.c
Extension
.c
Size
3822 bytes
Lines
134
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.

Dependency Surface

Detected Declarations

Annotated Snippet

#include <nvif/mmu.h>

#include <nvif/class.h>
#include <nvif/if0008.h>

void
nvif_mmu_dtor(struct nvif_mmu *mmu)
{
	if (!nvif_object_constructed(&mmu->object))
		return;

	kfree(mmu->kind);
	kfree(mmu->type);
	kfree(mmu->heap);
	nvif_object_dtor(&mmu->object);
}

int
nvif_mmu_ctor(struct nvif_object *parent, const char *name, s32 oclass,
	      struct nvif_mmu *mmu)
{
	static const struct nvif_mclass mems[] = {
		{ NVIF_CLASS_MEM_GF100, -1 },
		{ NVIF_CLASS_MEM_NV50 , -1 },
		{ NVIF_CLASS_MEM_NV04 , -1 },
		{}
	};
	struct nvif_mmu_v0 args;
	int ret, i;

	args.version = 0;
	mmu->heap = NULL;
	mmu->type = NULL;
	mmu->kind = NULL;

	ret = nvif_object_ctor(parent, name ? name : "nvifMmu", 0, oclass,
			       &args, sizeof(args), &mmu->object);
	if (ret)
		goto done;

	mmu->dmabits = args.dmabits;
	mmu->heap_nr = args.heap_nr;
	mmu->type_nr = args.type_nr;
	mmu->kind_nr = args.kind_nr;

	ret = nvif_mclass(&mmu->object, mems);
	if (ret < 0)
		goto done;
	mmu->mem = mems[ret].oclass;

	mmu->heap = kmalloc_objs(*mmu->heap, mmu->heap_nr);
	mmu->type = kmalloc_objs(*mmu->type, mmu->type_nr);
	if (ret = -ENOMEM, !mmu->heap || !mmu->type)
		goto done;

	mmu->kind = kmalloc_objs(*mmu->kind, mmu->kind_nr);
	if (!mmu->kind && mmu->kind_nr)
		goto done;

	for (i = 0; i < mmu->heap_nr; i++) {
		struct nvif_mmu_heap_v0 args = { .index = i };

		ret = nvif_object_mthd(&mmu->object, NVIF_MMU_V0_HEAP,
				       &args, sizeof(args));
		if (ret)
			goto done;

		mmu->heap[i].size = args.size;
	}

	for (i = 0; i < mmu->type_nr; i++) {
		struct nvif_mmu_type_v0 args = { .index = i };

		ret = nvif_object_mthd(&mmu->object, NVIF_MMU_V0_TYPE,
				       &args, sizeof(args));
		if (ret)
			goto done;

		mmu->type[i].type = 0;
		if (args.vram) mmu->type[i].type |= NVIF_MEM_VRAM;
		if (args.host) mmu->type[i].type |= NVIF_MEM_HOST;
		if (args.comp) mmu->type[i].type |= NVIF_MEM_COMP;
		if (args.disp) mmu->type[i].type |= NVIF_MEM_DISP;
		if (args.kind    ) mmu->type[i].type |= NVIF_MEM_KIND;
		if (args.mappable) mmu->type[i].type |= NVIF_MEM_MAPPABLE;
		if (args.coherent) mmu->type[i].type |= NVIF_MEM_COHERENT;
		if (args.uncached) mmu->type[i].type |= NVIF_MEM_UNCACHED;
		mmu->type[i].heap = args.heap;
	}

Annotation

Implementation Notes