[Intel-gfx] [RFC PATCH 97/97] drm/i915/guc: Unblock GuC submission on Gen11+

[Matthew Brost]

From: Daniele Ceraolo Spurio <daniele.ceraolospurio at intel.com>

Unblock GuC submission on Gen11+ platforms.

Signed-off-by: Michal Wajdeczko <michal.wajdeczko at intel.com>
Signed-off-by: Daniele Ceraolo Spurio <daniele.ceraolospurio at intel.com>
Signed-off-by: Matthew Brost <matthew.brost at intel.com>
---
 drivers/gpu/drm/i915/gt/uc/intel_guc.h            |  1 +
 drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c |  8 ++++++++
 drivers/gpu/drm/i915/gt/uc/intel_guc_submission.h |  3 +--
 drivers/gpu/drm/i915/gt/uc/intel_uc.c             | 14 +++++++++-----
 4 files changed, 19 insertions(+), 7 deletions(-)

diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc.h b/drivers/gpu/drm/i915/gt/uc/intel_guc.h
index 169daaf8a189..ac7ece2f4c8c 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_guc.h
+++ b/drivers/gpu/drm/i915/gt/uc/intel_guc.h
@@ -66,6 +66,7 @@ struct intel_guc {
 	struct list_head destroyed_contexts;
 	struct intel_gt_pm_delayed_work destroy_worker;
 
+	bool submission_supported;
 	bool submission_selected;
 
 	struct i915_vma *ads_vma;
diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c b/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
index 594a99ea4f5c..b9c86e0f02b2 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
+++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
@@ -3477,6 +3477,13 @@ void intel_guc_submission_disable(struct intel_guc *guc)
 	/* Note: By the time we're here, GuC may have already been reset */
 }
 
+static bool __guc_submission_supported(struct intel_guc *guc)
+{
+	/* GuC submission is unavailable for pre-Gen11 */
+	return intel_guc_is_supported(guc) &&
+	       INTEL_GEN(guc_to_gt(guc)->i915) >= 11;
+}
+
 static bool __guc_submission_selected(struct intel_guc *guc)
 {
 	struct drm_i915_private *i915 = guc_to_gt(guc)->i915;
@@ -3491,6 +3498,7 @@ void intel_guc_submission_init_early(struct intel_guc *guc)
 {
 	guc->max_guc_ids = GUC_MAX_LRC_DESCRIPTORS;
 	guc->num_guc_ids = GUC_MAX_LRC_DESCRIPTORS;
+	guc->submission_supported = __guc_submission_supported(guc);
 	guc->submission_selected = __guc_submission_selected(guc);
 }
 
diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.h b/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.h
index 60c8b9aaad6e..9431ec52a6c4 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.h
+++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.h
@@ -37,8 +37,7 @@ int intel_guc_wait_for_pending_msg(struct intel_guc *guc,
 
 static inline bool intel_guc_submission_is_supported(struct intel_guc *guc)
 {
-	/* XXX: GuC submission is unavailable for now */
-	return false;
+	return guc->submission_supported;
 }
 
 static inline bool intel_guc_submission_is_wanted(struct intel_guc *guc)
diff --git a/drivers/gpu/drm/i915/gt/uc/intel_uc.c b/drivers/gpu/drm/i915/gt/uc/intel_uc.c
index 4a79db4a739f..8cfb226da62e 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_uc.c
+++ b/drivers/gpu/drm/i915/gt/uc/intel_uc.c
@@ -34,8 +34,15 @@ static void uc_expand_default_options(struct intel_uc *uc)
 		return;
 	}
 
-	/* Default: enable HuC authentication only */
-	i915->params.enable_guc = ENABLE_GUC_LOAD_HUC;
+	/* Intermediate platforms are HuC authentication only */
+	if (IS_DG1(i915) || IS_ALDERLAKE_S(i915)) {
+		drm_dbg(&i915->drm, "Disabling GuC only due to old platform\n");
+		i915->params.enable_guc = ENABLE_GUC_LOAD_HUC;
+		return;
+	}
+
+	/* Default: enable HuC authentication and GuC submission */
+	i915->params.enable_guc = ENABLE_GUC_LOAD_HUC | ENABLE_GUC_SUBMISSION;
 }
 
 /* Reset GuC providing us with fresh state for both GuC and HuC.
@@ -313,9 +320,6 @@ static int __uc_init(struct intel_uc *uc)
 	if (i915_inject_probe_failure(uc_to_gt(uc)->i915))
 		return -ENOMEM;
 
-	/* XXX: GuC submission is unavailable for now */
-	GEM_BUG_ON(intel_uc_uses_guc_submission(uc));
-
 	ret = intel_guc_init(guc);
 	if (ret)
 		return ret;
-- 
2.28.0