[Intel-gfx] [PATCH v6 07/11] drm/i915: add syncobj timeline support

[Chris Wilson]

Quoting Lionel Landwerlin (2019-07-01 12:34:33)
>  struct i915_execbuffer {
>         struct drm_i915_private *i915; /** i915 backpointer */
>         struct drm_file *file; /** per-file lookup tables and limits */
> @@ -275,6 +282,7 @@ struct i915_execbuffer {
>  
>         struct {
>                 u64 flags; /** Available extensions parameters */
> +               struct drm_i915_gem_execbuffer_ext_timeline_fences timeline_fences;
>         } extensions;
>  };
> +static int parse_timeline_fences(struct i915_user_extension __user *ext, void *data)
> +{
> +       struct i915_execbuffer *eb = data;
> +
> +       /* Timeline fences are incompatible with the fence array flag. */
> +       if (eb->args->flags & I915_EXEC_FENCE_ARRAY)
> +               return -EINVAL;
> +
> +       if (eb->extensions.flags & BIT(DRM_I915_GEM_EXECBUFFER_EXT_TIMELINE_FENCES))
> +               return -EINVAL;

flags is 64b, so wiser if we use BIT_ULL() from the start. You don't
want to copy my bugs ;)
-Chris