drm/amd/pm: Add ih for SMU v13.0.6 thermal throttling

Add interrupt handler for thermal throttler events from
PMFW on SMUv13.0.6

Signed-off-by: Asad kamal <asad.kamal@amd.com>
Acked-by: Evan Quan <evan.quan@amd.com>
Reviewed-by: Lijo Lazar <lijo.lazar@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/pm/swsmu/smu13/smu_v13_0_6_ppt.c

@@ -1297,6 +1297,109 @@ static int smu_v13_0_6_set_power_limit(struct smu_context *smu,
 	return smu_v13_0_set_power_limit(smu, limit_type, limit);
 }
 
+static int smu_v13_0_6_irq_process(struct amdgpu_device *adev,
+				   struct amdgpu_irq_src *source,
+				   struct amdgpu_iv_entry *entry)
+{
+	struct smu_context *smu = adev->powerplay.pp_handle;
+	uint32_t client_id = entry->client_id;
+	uint32_t src_id = entry->src_id;
+	/*
+	 * ctxid is used to distinguish different
+	 * events for SMCToHost interrupt
+	 */
+	uint32_t ctxid = entry->src_data[0];
+	uint32_t data;
+
+	if (client_id == SOC15_IH_CLIENTID_MP1) {
+		if (src_id == IH_INTERRUPT_ID_TO_DRIVER) {
+			/* ACK SMUToHost interrupt */
+			data = RREG32_SOC15(MP1, 0, regMP1_SMN_IH_SW_INT_CTRL);
+			data = REG_SET_FIELD(data, MP1_SMN_IH_SW_INT_CTRL, INT_ACK, 1);
+			WREG32_SOC15(MP1, 0, regMP1_SMN_IH_SW_INT_CTRL, data);
+
+			switch (ctxid) {
+			case IH_INTERRUPT_CONTEXT_ID_THERMAL_THROTTLING:
+				/*
+				 * Increment the throttle interrupt counter
+				 */
+				atomic64_inc(&smu->throttle_int_counter);
+
+				if (!atomic_read(&adev->throttling_logging_enabled))
+					return 0;
+
+				if (__ratelimit(&adev->throttling_logging_rs))
+					schedule_work(&smu->throttling_logging_work);
+
+				break;
+			}
+		}
+	}
+
+	return 0;
+}
+
+int smu_v13_0_6_set_irq_state(struct amdgpu_device *adev,
+			      struct amdgpu_irq_src *source,
+			      unsigned tyep,
+			      enum amdgpu_interrupt_state state)
+{
+	uint32_t val = 0;
+
+	switch (state) {
+	case AMDGPU_IRQ_STATE_DISABLE:
+		/* For MP1 SW irqs */
+		val = RREG32_SOC15(MP1, 0, regMP1_SMN_IH_SW_INT_CTRL);
+		val = REG_SET_FIELD(val, MP1_SMN_IH_SW_INT_CTRL, INT_MASK, 1);
+		WREG32_SOC15(MP1, 0, regMP1_SMN_IH_SW_INT_CTRL, val);
+
+		break;
+	case AMDGPU_IRQ_STATE_ENABLE:
+		/* For MP1 SW irqs */
+		val = RREG32_SOC15(MP1, 0, regMP1_SMN_IH_SW_INT);
+		val = REG_SET_FIELD(val, MP1_SMN_IH_SW_INT, ID, 0xFE);
+		val = REG_SET_FIELD(val, MP1_SMN_IH_SW_INT, VALID, 0);
+		WREG32_SOC15(MP1, 0, regMP1_SMN_IH_SW_INT, val);
+
+		val = RREG32_SOC15(MP1, 0, regMP1_SMN_IH_SW_INT_CTRL);
+		val = REG_SET_FIELD(val, MP1_SMN_IH_SW_INT_CTRL, INT_MASK, 0);
+		WREG32_SOC15(MP1, 0, regMP1_SMN_IH_SW_INT_CTRL, val);
+
+		break;
+	default:
+		break;
+	}
+
+	return 0;
+}
+
+static const struct amdgpu_irq_src_funcs smu_v13_0_6_irq_funcs =
+{
+	.set = smu_v13_0_6_set_irq_state,
+	.process = smu_v13_0_6_irq_process,
+};
+
+int smu_v13_0_6_register_irq_handler(struct smu_context *smu)
+{
+	struct amdgpu_device *adev = smu->adev;
+	struct amdgpu_irq_src *irq_src = &smu->irq_source;
+	int ret = 0;
+
+	if (amdgpu_sriov_vf(adev))
+		return 0;
+
+	irq_src->num_types = 1;
+	irq_src->funcs = &smu_v13_0_6_irq_funcs;
+
+	ret = amdgpu_irq_add_id(adev, SOC15_IH_CLIENTID_MP1,
+				IH_INTERRUPT_ID_TO_DRIVER,
+				irq_src);
+	if (ret)
+		return ret;
+
+	return ret;
+}
+
 static int smu_v13_0_6_system_features_control(struct smu_context *smu,
 					       bool enable)
 {
@@ -2042,11 +2145,9 @@ static const struct pptable_funcs smu_v13_0_6_ppt_funcs = {
 	.feature_is_enabled = smu_cmn_feature_is_enabled,
 	.set_power_limit = smu_v13_0_6_set_power_limit,
 	.set_xgmi_pstate = smu_v13_0_set_xgmi_pstate,
-	/* TODO: Thermal limits unknown, skip these for now
+	.register_irq_handler = smu_v13_0_6_register_irq_handler,
-	.register_irq_handler = smu_v13_0_register_irq_handler,
 	.enable_thermal_alert = smu_v13_0_enable_thermal_alert,
 	.disable_thermal_alert = smu_v13_0_disable_thermal_alert,
-	*/
 	.setup_pptable = smu_v13_0_6_setup_pptable,
 	.baco_is_support = smu_v13_0_6_is_baco_supported,
 	.get_dpm_ultimate_freq = smu_v13_0_6_get_dpm_ultimate_freq,