[Intel-gfx] [RFC 4/4] drm/i915: Expose RPCS (SSEU) configuration to userspace

[Lionel Landwerlin]

On 02/05/17 12:49, Chris Wilson wrote:
> diff --git a/include/uapi/drm/i915_drm.h b/include/uapi/drm/i915_drm.h
> index 34ee011f08ac..106d9140d65e 100644
> --- a/include/uapi/drm/i915_drm.h
> +++ b/include/uapi/drm/i915_drm.h
> @@ -1327,6 +1327,17 @@ struct drm_i915_gem_context_param {
>   #define   I915_CONTEXT_MAX_USER_PRIORITY	1023 /* inclusive */
>   #define   I915_CONTEXT_DEFAULT_PRIORITY		0
>   #define   I915_CONTEXT_MIN_USER_PRIORITY	-1023 /* inclusive */
> +#define I915_CONTEXT_PARAM_SSEU		0x7
> +	__u64 value;
> +};
> +
> +union drm_i915_gem_context_param_sseu {
> +	struct {
> +		u8 slice_mask;
> +		u8 subslice_mask;
> +		u8 min_eu_per_subslice;
> +		u8 max_eu_per_subslice;
> +	} packed;
>   	__u64 value;
>   };
>   
Would it make sense to expose this as a query through 
DRM_IOCTL_I915_GETPARAM as well?
So the userspace could get the max values rather than just the last setup.

Cheers,

-
Lionel