> -----Original Message-----
> From: amd-gfx [mailto:amd-gfx-boun...@lists.freedesktop.org] On Behalf
> Of Christian König
> Sent: Friday, September 16, 2016 5:48 AM
> To: amd-gfx@lists.freedesktop.org
> Subject: [PATCH] drm/amdgpu: allocate GTT space for shadow VM page
> tables
> 
> From: Christian König <christian.koe...@amd.com>
> 
> We need to access those with the system domain.
> 
> Fixes fallout from only allocating GTT space on demand.
> 
> Signed-off-by: Christian König <christian.koe...@amd.com>

Reviewed-by: Alex Deucher <alexander.deuc...@amd.com>

> ---
>  drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c | 17 +++++++++++++++++
>  1 file changed, 17 insertions(+)
> 
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
> b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
> index a6a48ed..8928a2a 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
> @@ -552,6 +552,10 @@ static int amdgpu_vm_clear_bo(struct
> amdgpu_device *adev,
>       if (r)
>               goto error;
> 
> +     r = amdgpu_ttm_bind(&bo->tbo, &bo->tbo.mem);
> +     if (r)
> +             goto error;
> +
>       addr = amdgpu_bo_gpu_offset(bo);
>       entries = amdgpu_bo_size(bo) / 8;
> 
> @@ -625,6 +629,11 @@ static int
> amdgpu_vm_update_pd_or_shadow(struct amdgpu_device *adev,
> 
>       if (!pd)
>               return 0;
> +
> +     r = amdgpu_ttm_bind(&pd->tbo, &pd->tbo.mem);
> +     if (r)
> +             return r;
> +
>       pd_addr = amdgpu_bo_gpu_offset(pd);
>       ring = container_of(vm->entity.sched, struct amdgpu_ring, sched);
> 
> @@ -650,6 +659,14 @@ static int
> amdgpu_vm_update_pd_or_shadow(struct amdgpu_device *adev,
>               if (bo == NULL)
>                       continue;
> 
> +             if (bo->shadow) {
> +                     struct amdgpu_bo *shadow = bo->shadow;
> +
> +                     r = amdgpu_ttm_bind(&shadow->tbo, &shadow-
> >tbo.mem);
> +                     if (r)
> +                             return r;
> +             }
> +
>               pt = amdgpu_bo_gpu_offset(bo);
>               if (!shadow) {
>                       if (vm->page_tables[pt_idx].addr == pt)
> --
> 2.5.0
> 
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