[Intel-gfx] [PATCH] i915/perf: Disable OA sseu config param for non-gen11 platforms

[Lionel Landwerlin]

On 07/07/2022 00:52, Nerlige Ramappa, Umesh wrote:
> The global sseu config is applicable only to gen11 platforms where
> concurrent media, render and OA use cases may cause some subslices to be
> turned off and hence lose NOA configuration. Return ENODEV for non-gen11
> platforms.
>
> Signed-off-by: Umesh Nerlige Ramappa <umesh.nerlige.ramappa at intel.com>


The problem is that we have gfx12 platforms shipped using this.

So I guess have to disable it on gfx12.5+ where it was never accepted.


-Lionel


> ---
>   drivers/gpu/drm/i915/i915_perf.c | 6 ++++++
>   1 file changed, 6 insertions(+)
>
> diff --git a/drivers/gpu/drm/i915/i915_perf.c b/drivers/gpu/drm/i915/i915_perf.c
> index 1577ab6754db..512c163fdbeb 100644
> --- a/drivers/gpu/drm/i915/i915_perf.c
> +++ b/drivers/gpu/drm/i915/i915_perf.c
> @@ -3706,6 +3706,12 @@ static int read_properties_unlocked(struct i915_perf *perf,
>   		case DRM_I915_PERF_PROP_GLOBAL_SSEU: {
>   			struct drm_i915_gem_context_param_sseu user_sseu;
>   
> +			if (GRAPHICS_VER(perf->i915) != 11) {
> +				DRM_DEBUG("Global SSEU config not supported on gen%d\n",
> +					  GRAPHICS_VER(perf->i915));
> +				return -ENODEV;
> +			}
> +
>   			if (copy_from_user(&user_sseu,
>   					   u64_to_user_ptr(value),
>   					   sizeof(user_sseu))) {