[Intel-gfx] [PATCH 1/5] drm/i915/icl/guc: Do not allow GuC submission on Icelake for now

[Oscar Mateo]

Sanitize the enable_guc option so that we can enable HuC authentication,
but nothing else. The firmware interface has changed quite dramatically
in Gen11, so it will take a while before we can submit workloads to the
GuC with guarantees.

Signed-off-by: Oscar Mateo <oscar.mateo at intel.com>
Cc: Joonas Lahtinen <joonas.lahtinen at linux.intel.com>
Cc: Michal Wajdeczko <michal.wajdeczko at intel.com>
Cc: John Spotswood <john.a.spotswood at intel.com>
Cc: Tony Ye <tony.ye at intel.com>
---
 drivers/gpu/drm/i915/intel_uc.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/drivers/gpu/drm/i915/intel_uc.c b/drivers/gpu/drm/i915/intel_uc.c
index 1cffaf7..d2a935c 100644
--- a/drivers/gpu/drm/i915/intel_uc.c
+++ b/drivers/gpu/drm/i915/intel_uc.c
@@ -63,6 +63,8 @@ static int __get_platform_enable_guc(struct drm_i915_private *dev_priv)
 		enable_guc |= ENABLE_GUC_LOAD_HUC;
 
 	/* Any platform specific fine-tuning can be done here */
+	if (INTEL_GEN(dev_priv) >= 11)
+		enable_guc &= ~ENABLE_GUC_SUBMISSION;
 
 	return enable_guc;
 }
@@ -115,6 +117,14 @@ static void sanitize_options_early(struct drm_i915_private *dev_priv)
 			 yesno(intel_uc_is_using_guc_submission()),
 			 yesno(intel_uc_is_using_huc()));
 
+	/* Verify GuC submission support */
+	if (intel_uc_is_using_guc_submission() && INTEL_GEN(dev_priv) >= 11) {
+		DRM_WARN("Incompatible option detected: %s=%d, %s!\n",
+			 "enable_guc", i915_modparams.enable_guc,
+			 "submission not supported");
+		i915_modparams.enable_guc &= ~ENABLE_GUC_SUBMISSION;
+	}
+
 	/* Verify GuC firmware availability */
 	if (intel_uc_is_using_guc() && !intel_uc_fw_is_selected(guc_fw)) {
 		DRM_WARN("Incompatible option detected: %s=%d, %s!\n",
-- 
1.9.1