drm/amd/powerplay: guard consistency between CPU copy and local VRAM

This can prevent CPU to use the out-dated copy.
Signed-off-by: Evan Quan <evan.quan@amd.com>
Reviewed-by: Kenneth Feng <kenneth.feng@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/powerplay/amdgpu_smu.c

@@ -451,6 +451,7 @@ int smu_update_table(struct smu_context *smu, enum smu_table_id table_index, int
 		     void *table_data, bool drv2smu)
 {
 	struct smu_table_context *smu_table = &smu->smu_table;
+	struct amdgpu_device *adev = smu->adev;
 	struct smu_table *table = NULL;
 	int ret = 0;
 	int table_id = smu_table_get_index(smu, table_index);
@@ -478,6 +479,9 @@ int smu_update_table(struct smu_context *smu, enum smu_table_id table_index, int
 	if (ret)
 		return ret;
 
+	/* flush hdp cache */
+	adev->nbio_funcs->hdp_flush(adev, NULL);
+
 	if (!drv2smu)
 		memcpy(table_data, table->cpu_addr, table->size);
 

drivers/gpu/drm/amd/powerplay/smumgr/smu10_smumgr.c

@@ -118,6 +118,7 @@ static int smu10_copy_table_from_smc(struct pp_hwmgr *hwmgr,
 {
 	struct smu10_smumgr *priv =
 			(struct smu10_smumgr *)(hwmgr->smu_backend);
+	struct amdgpu_device *adev = hwmgr->adev;
 
 	PP_ASSERT_WITH_CODE(table_id < MAX_SMU_TABLE,
 			"Invalid SMU Table ID!", return -EINVAL;);
@@ -135,6 +136,9 @@ static int smu10_copy_table_from_smc(struct pp_hwmgr *hwmgr,
 			PPSMC_MSG_TransferTableSmu2Dram,
 			priv->smu_tables.entry[table_id].table_id);
 
+	/* flush hdp cache */
+	adev->nbio_funcs->hdp_flush(adev, NULL);
+
 	memcpy(table, (uint8_t *)priv->smu_tables.entry[table_id].table,
 			priv->smu_tables.entry[table_id].size);
 

drivers/gpu/drm/amd/powerplay/smumgr/vega10_smumgr.c

@@ -39,6 +39,7 @@ static int vega10_copy_table_from_smc(struct pp_hwmgr *hwmgr,
 		uint8_t *table, int16_t table_id)
 {
 	struct vega10_smumgr *priv = hwmgr->smu_backend;
+	struct amdgpu_device *adev = hwmgr->adev;
 
 	PP_ASSERT_WITH_CODE(table_id < MAX_SMU_TABLE,
 			"Invalid SMU Table ID!", return -EINVAL);
@@ -56,6 +57,9 @@ static int vega10_copy_table_from_smc(struct pp_hwmgr *hwmgr,
 			PPSMC_MSG_TransferTableSmu2Dram,
 			priv->smu_tables.entry[table_id].table_id);
 
+	/* flush hdp cache */
+	adev->nbio_funcs->hdp_flush(adev, NULL);
+
 	memcpy(table, priv->smu_tables.entry[table_id].table,
 			priv->smu_tables.entry[table_id].size);
 

drivers/gpu/drm/amd/powerplay/smumgr/vega12_smumgr.c

@@ -42,6 +42,7 @@ static int vega12_copy_table_from_smc(struct pp_hwmgr *hwmgr,
 {
 	struct vega12_smumgr *priv =
 			(struct vega12_smumgr *)(hwmgr->smu_backend);
+	struct amdgpu_device *adev = hwmgr->adev;
 
 	PP_ASSERT_WITH_CODE(table_id < TABLE_COUNT,
 			"Invalid SMU Table ID!", return -EINVAL);
@@ -64,6 +65,9 @@ static int vega12_copy_table_from_smc(struct pp_hwmgr *hwmgr,
 			"[CopyTableFromSMC] Attempt to Transfer Table From SMU Failed!",
 			return -EINVAL);
 
+	/* flush hdp cache */
+	adev->nbio_funcs->hdp_flush(adev, NULL);
+
 	memcpy(table, priv->smu_tables.entry[table_id].table,
 			priv->smu_tables.entry[table_id].size);
 

drivers/gpu/drm/amd/powerplay/smumgr/vega20_smumgr.c

@@ -163,6 +163,7 @@ static int vega20_copy_table_from_smc(struct pp_hwmgr *hwmgr,
 {
 	struct vega20_smumgr *priv =
 			(struct vega20_smumgr *)(hwmgr->smu_backend);
+	struct amdgpu_device *adev = hwmgr->adev;
 	int ret = 0;
 
 	PP_ASSERT_WITH_CODE(table_id < TABLE_COUNT,
@@ -187,6 +188,9 @@ static int vega20_copy_table_from_smc(struct pp_hwmgr *hwmgr,
 			"[CopyTableFromSMC] Attempt to Transfer Table From SMU Failed!",
 			return ret);
 
+	/* flush hdp cache */
+	adev->nbio_funcs->hdp_flush(adev, NULL);
+
 	memcpy(table, priv->smu_tables.entry[table_id].table,
 			priv->smu_tables.entry[table_id].size);
 
@@ -266,6 +270,7 @@ int vega20_get_activity_monitor_coeff(struct pp_hwmgr *hwmgr,
 {
 	struct vega20_smumgr *priv =
 			(struct vega20_smumgr *)(hwmgr->smu_backend);
+	struct amdgpu_device *adev = hwmgr->adev;
 	int ret = 0;
 
 	PP_ASSERT_WITH_CODE((ret = vega20_send_msg_to_smc_with_parameter(hwmgr,
@@ -284,6 +289,9 @@ int vega20_get_activity_monitor_coeff(struct pp_hwmgr *hwmgr,
 			"[GetActivityMonitor] Attempt to Transfer Table From SMU Failed!",
 			return ret);
 
+	/* flush hdp cache */
+	adev->nbio_funcs->hdp_flush(adev, NULL);
+
 	memcpy(table, priv->smu_tables.entry[TABLE_ACTIVITY_MONITOR_COEFF].table,
 			priv->smu_tables.entry[TABLE_ACTIVITY_MONITOR_COEFF].size);