drm/amd/powerplay: support SMU metrics table on Vega12

That should provide some necessary sensor information.
Signed-off-by: Evan Quan <evan.quan@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/powerplay/hwmgr/vega12_hwmgr.c

@@ -1237,6 +1237,27 @@ static uint32_t vega12_dpm_get_mclk(struct pp_hwmgr *hwmgr, bool low)
 	return (mem_clk * 100);
 }
 
+static int vega12_get_metrics_table(struct pp_hwmgr *hwmgr, SmuMetrics_t *metrics_table)
+{
+	struct vega12_hwmgr *data =
+			(struct vega12_hwmgr *)(hwmgr->backend);
+	int ret = 0;
+
+	if (!data->metrics_time || time_after(jiffies, data->metrics_time + HZ / 2)) {
+		ret = smum_smc_table_manager(hwmgr, (uint8_t *)metrics_table,
+				TABLE_SMU_METRICS, true);
+		if (ret) {
+			pr_info("Failed to export SMU metrics table!\n");
+			return ret;
+		}
+		memcpy(&data->metrics_table, metrics_table, sizeof(SmuMetrics_t));
+		data->metrics_time = jiffies;
+	} else
+		memcpy(metrics_table, &data->metrics_table, sizeof(SmuMetrics_t));
+
+	return ret;
+}
+
 static int vega12_get_gpu_power(struct pp_hwmgr *hwmgr, uint32_t *query)
 {
 #if 0

drivers/gpu/drm/amd/powerplay/hwmgr/vega12_hwmgr.h

@@ -396,6 +396,9 @@ struct vega12_hwmgr {
 
 	/* ---- Gfxoff ---- */
 	bool                           gfxoff_controlled_by_driver;
+
+	unsigned long                  metrics_time;
+	SmuMetrics_t                   metrics_table;
 };
 
 #define VEGA12_DPM2_NEAR_TDP_DEC                      10

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

@@ -287,8 +287,26 @@ static int vega12_smu_init(struct pp_hwmgr *hwmgr)
 	priv->smu_tables.entry[TABLE_OVERDRIVE].version = 0x01;
 	priv->smu_tables.entry[TABLE_OVERDRIVE].size = sizeof(OverDriveTable_t);
 
+	/* allocate space for SMU_METRICS table */
+	ret = amdgpu_bo_create_kernel((struct amdgpu_device *)hwmgr->adev,
+				      sizeof(SmuMetrics_t),
+				      PAGE_SIZE,
+				      AMDGPU_GEM_DOMAIN_VRAM,
+				      &priv->smu_tables.entry[TABLE_SMU_METRICS].handle,
+				      &priv->smu_tables.entry[TABLE_SMU_METRICS].mc_addr,
+				      &priv->smu_tables.entry[TABLE_SMU_METRICS].table);
+	if (ret)
+		goto err4;
+
+	priv->smu_tables.entry[TABLE_SMU_METRICS].version = 0x01;
+	priv->smu_tables.entry[TABLE_SMU_METRICS].size = sizeof(SmuMetrics_t);
+
 	return 0;
 
+err4:
+	amdgpu_bo_free_kernel(&priv->smu_tables.entry[TABLE_OVERDRIVE].handle,
+				&priv->smu_tables.entry[TABLE_OVERDRIVE].mc_addr,
+				&priv->smu_tables.entry[TABLE_OVERDRIVE].table);
 err3:
 	amdgpu_bo_free_kernel(&priv->smu_tables.entry[TABLE_AVFS_FUSE_OVERRIDE].handle,
 				&priv->smu_tables.entry[TABLE_AVFS_FUSE_OVERRIDE].mc_addr,
@@ -334,6 +352,9 @@ static int vega12_smu_fini(struct pp_hwmgr *hwmgr)
 		amdgpu_bo_free_kernel(&priv->smu_tables.entry[TABLE_OVERDRIVE].handle,
 				      &priv->smu_tables.entry[TABLE_OVERDRIVE].mc_addr,
 				      &priv->smu_tables.entry[TABLE_OVERDRIVE].table);
+		amdgpu_bo_free_kernel(&priv->smu_tables.entry[TABLE_SMU_METRICS].handle,
+				      &priv->smu_tables.entry[TABLE_SMU_METRICS].mc_addr,
+				      &priv->smu_tables.entry[TABLE_SMU_METRICS].table);
 		kfree(hwmgr->smu_backend);
 		hwmgr->smu_backend = NULL;
 	}