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>
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@ -37,4 +37,8 @@ int nvkm_gpuobj_wrap(struct nvkm_memory *, struct nvkm_gpuobj **);
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int nvkm_gpuobj_map(struct nvkm_gpuobj *, struct nvkm_vm *, u32 access,
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struct nvkm_vma *);
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void nvkm_gpuobj_unmap(struct nvkm_vma *);
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void nvkm_gpuobj_memcpy_to(struct nvkm_gpuobj *dst, u32 dstoffset, void *src,
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u32 length);
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void nvkm_gpuobj_memcpy_from(void *dst, struct nvkm_gpuobj *src, u32 srcoffset,
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u32 length);
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#endif
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@ -253,3 +253,23 @@ nvkm_gpuobj_wrap(struct nvkm_memory *memory, struct nvkm_gpuobj **pgpuobj)
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(*pgpuobj)->size = nvkm_memory_size(memory);
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return 0;
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}
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void
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nvkm_gpuobj_memcpy_to(struct nvkm_gpuobj *dst, u32 dstoffset, void *src,
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u32 length)
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{
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int i;
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for (i = 0; i < length; i += 4)
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nvkm_wo32(dst, dstoffset + i, *(u32 *)(src + i));
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}
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void
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nvkm_gpuobj_memcpy_from(void *dst, struct nvkm_gpuobj *src, u32 srcoffset,
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u32 length)
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{
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int i;
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for (i = 0; i < length; i += 4)
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((u32 *)src)[i / 4] = nvkm_ro32(src, srcoffset + i);
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}
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