Re: [PATCH v2 19/22] drm/i915: don't allocate the ring in stolen if we lack aperture

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Quoting Matthew Auld (2019-10-03 20:24:41)
> Since we have no way access it from the CPU. For such cases just
> fallback to internal objects.
> 
> Signed-off-by: Matthew Auld <matthew.auld@xxxxxxxxx>
> ---
>  drivers/gpu/drm/i915/gt/intel_ringbuffer.c | 4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/i915/gt/intel_ringbuffer.c b/drivers/gpu/drm/i915/gt/intel_ringbuffer.c
> index e220c09c6f32..c48f1d20af5f 100644
> --- a/drivers/gpu/drm/i915/gt/intel_ringbuffer.c
> +++ b/drivers/gpu/drm/i915/gt/intel_ringbuffer.c
> @@ -1273,7 +1273,9 @@ static struct i915_vma *create_ring_vma(struct i915_ggtt *ggtt, int size)
                                                                ^
There's a ggtt right there --------------------------------------

>         struct drm_i915_gem_object *obj;
>         struct i915_vma *vma;
>  
> -       obj = i915_gem_object_create_stolen(i915, size);
> +       obj = ERR_PTR(-ENODEV);
> +       if (HAS_MAPPABLE_APERTURE(i915))
> +               obj = i915_gem_object_create_stolen(i915, size);
>         if (IS_ERR(obj))
>                 obj = i915_gem_object_create_internal(i915, size);
>         if (IS_ERR(obj))
> -- 
> 2.20.1
> 
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