1 files changed, 93 insertions, 0 deletions

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 ca6f47496869..0ef295a94060 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
+++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
@@ -4178,6 +4178,98 @@ int intel_guc_submission_setup(struct intel_engine_cs *engine)
 	return 0;
 }
 
+struct scheduling_policy {
+	/* internal data */
+	u32 max_words, num_words;
+	u32 count;
+	/* API data */
+	struct guc_update_scheduling_policy h2g;
+};
+
+static u32 __guc_scheduling_policy_action_size(struct scheduling_policy *policy)
+{
+	u32 *start = (void *)&policy->h2g;
+	u32 *end = policy->h2g.data + policy->num_words;
+	size_t delta = end - start;
+
+	return delta;
+}
+
+static struct scheduling_policy *__guc_scheduling_policy_start_klv(struct scheduling_policy *policy)
+{
+	policy->h2g.header.action = INTEL_GUC_ACTION_UPDATE_SCHEDULING_POLICIES_KLV;
+	policy->max_words = ARRAY_SIZE(policy->h2g.data);
+	policy->num_words = 0;
+	policy->count = 0;
+
+	return policy;
+}
+
+static void __guc_scheduling_policy_add_klv(struct scheduling_policy *policy,
+					    u32 action, u32 *data, u32 len)
+{
+	u32 *klv_ptr = policy->h2g.data + policy->num_words;
+
+	GEM_BUG_ON((policy->num_words + 1 + len) > policy->max_words);
+	*(klv_ptr++) = FIELD_PREP(GUC_KLV_0_KEY, action) |
+		       FIELD_PREP(GUC_KLV_0_LEN, len);
+	memcpy(klv_ptr, data, sizeof(u32) * len);
+	policy->num_words += 1 + len;
+	policy->count++;
+}
+
+static int __guc_action_set_scheduling_policies(struct intel_guc *guc,
+						struct scheduling_policy *policy)
+{
+	int ret;
+
+	ret = intel_guc_send(guc, (u32 *)&policy->h2g,
+			     __guc_scheduling_policy_action_size(policy));
+	if (ret < 0)
+		return ret;
+
+	if (ret != policy->count) {
+		drm_warn(&guc_to_gt(guc)->i915->drm, "GuC global scheduler policy processed %d of %d KLVs!",
+			 ret, policy->count);
+		if (ret > policy->count)
+			return -EPROTO;
+	}
+
+	return 0;
+}
+
+static int guc_init_global_schedule_policy(struct intel_guc *guc)
+{
+	struct scheduling_policy policy;
+	struct intel_gt *gt = guc_to_gt(guc);
+	intel_wakeref_t wakeref;
+	int ret = 0;
+
+	if (GET_UC_VER(guc) < MAKE_UC_VER(70, 3, 0))
+		return 0;
+
+	__guc_scheduling_policy_start_klv(&policy);
+
+	with_intel_runtime_pm(&gt->i915->runtime_pm, wakeref) {
+		u32 yield[] = {
+			GLOBAL_SCHEDULE_POLICY_RC_YIELD_DURATION,
+			GLOBAL_SCHEDULE_POLICY_RC_YIELD_RATIO,
+		};
+
+		__guc_scheduling_policy_add_klv(&policy,
+						GUC_SCHEDULING_POLICIES_KLV_ID_RENDER_COMPUTE_YIELD,
+						yield, ARRAY_SIZE(yield));
+
+		ret = __guc_action_set_scheduling_policies(guc, &policy);
+		if (ret)
+			i915_probe_error(gt->i915,
+					 "Failed to configure global scheduling policies: %pe!\n",
+					 ERR_PTR(ret));
+	}
+
+	return ret;
+}
+
 void intel_guc_submission_enable(struct intel_guc *guc)
 {
 	struct intel_gt *gt = guc_to_gt(guc);
@@ -4190,6 +4282,7 @@ void intel_guc_submission_enable(struct intel_guc *guc)
 
 	guc_init_lrc_mapping(guc);
 	guc_init_engine_stats(guc);
+	guc_init_global_schedule_policy(guc);
 }
 
 void intel_guc_submission_disable(struct intel_guc *guc)