drm/amdgpu: Added ASIC specific checks in gfxhub V1.1 get XGMI info

Added max hive/node info checks per supported ASIC
Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: John Clements <john.clements@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/gfxhub_v1_1.c

@@ -33,16 +33,31 @@ int gfxhub_v1_1_get_xgmi_info(struct amdgpu_device *adev)
 	u32 xgmi_lfb_cntl = RREG32_SOC15(GC, 0, mmMC_VM_XGMI_LFB_CNTL);
 	u32 max_region =
 		REG_GET_FIELD(xgmi_lfb_cntl, MC_VM_XGMI_LFB_CNTL, PF_MAX_REGION);
+	u32 max_num_physical_nodes   = 0;
+	u32 max_physical_node_id     = 0;
+
+	switch (adev->asic_type) {
+	case CHIP_VEGA20:
+		max_num_physical_nodes   = 4;
+		max_physical_node_id     = 3;
+		break;
+	case CHIP_ARCTURUS:
+		max_num_physical_nodes   = 8;
+		max_physical_node_id     = 7;
+		break;
+	default:
+		return -EINVAL;
+	}
 
 	/* PF_MAX_REGION=0 means xgmi is disabled */
 	if (max_region) {
 		adev->gmc.xgmi.num_physical_nodes = max_region + 1;
-		if (adev->gmc.xgmi.num_physical_nodes > 4)
+		if (adev->gmc.xgmi.num_physical_nodes > max_num_physical_nodes)
 			return -EINVAL;
 
 		adev->gmc.xgmi.physical_node_id =
 			REG_GET_FIELD(xgmi_lfb_cntl, MC_VM_XGMI_LFB_CNTL, PF_LFB_REGION);
-		if (adev->gmc.xgmi.physical_node_id > 3)
+		if (adev->gmc.xgmi.physical_node_id > max_physical_node_id)
 			return -EINVAL;
 		adev->gmc.xgmi.node_segment_size = REG_GET_FIELD(
 			RREG32_SOC15(GC, 0, mmMC_VM_XGMI_LFB_SIZE),