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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: Alexandre Courbot <acourbot@nvidia.com>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
This commit is contained in:
Alexandre Courbot 2016-02-24 14:42:14 +09:00 committed by Ben Skeggs
parent 96fc422c27
commit 5d2083d2f9
2 changed files with 24 additions and 0 deletions
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4
drivers/gpu/drm/nouveau/include/nvkm/core/gpuobj.h
View File

@ -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

20
drivers/gpu/drm/nouveau/nvkm/core/gpuobj.c
View File

@ -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);
}