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Commit 5d2083d2 authored by Alexandre Courbot's avatar Alexandre Courbot Committed by Ben Skeggs
Browse files

drm/nouveau/core: add gpuobj memcpy helper functions 



Add memcpy functions to copy a buffer to a gpuobj and vice-versa. This
will be used by the secure boot code.

Signed-off-by: default avatarAlexandre Courbot <acourbot@nvidia.com>
Signed-off-by: default avatarBen Skeggs <bskeggs@redhat.com>
parent 96fc422c

drivers/gpu/drm/nouveau/include/nvkm/core/gpuobj.h

+4 −0
Original line number Diff line number Diff line
@@ -37,4 +37,8 @@ int nvkm_gpuobj_wrap(struct nvkm_memory *, struct nvkm_gpuobj **); 
int nvkm_gpuobj_map(struct nvkm_gpuobj *, struct nvkm_vm *, u32 access,

		    struct nvkm_vma *);

void nvkm_gpuobj_unmap(struct nvkm_vma *);

void nvkm_gpuobj_memcpy_to(struct nvkm_gpuobj *dst, u32 dstoffset, void *src,

			   u32 length);

void nvkm_gpuobj_memcpy_from(void *dst, struct nvkm_gpuobj *src, u32 srcoffset,

			     u32 length);

#endif

drivers/gpu/drm/nouveau/nvkm/core/gpuobj.c

+20 −0
Original line number Diff line number Diff line
@@ -253,3 +253,23 @@ nvkm_gpuobj_wrap(struct nvkm_memory *memory, struct nvkm_gpuobj **pgpuobj) 
	(*pgpuobj)->size = nvkm_memory_size(memory);

	return 0;

}



void

nvkm_gpuobj_memcpy_to(struct nvkm_gpuobj *dst, u32 dstoffset, void *src,

		      u32 length)

{

	int i;



	for (i = 0; i < length; i += 4)

		nvkm_wo32(dst, dstoffset + i, *(u32 *)(src + i));

}



void

nvkm_gpuobj_memcpy_from(void *dst, struct nvkm_gpuobj *src, u32 srcoffset,

			u32 length)

{

	int i;



	for (i = 0; i < length; i += 4)

		((u32 *)src)[i / 4] = nvkm_ro32(src, srcoffset + i);

}