NTB_BAR_3
ntb->bar_info[NTB_BAR_3].pci_resource_id = PCIR_BAR(4);
rc = map_bar(ntb, &ntb->bar_info[NTB_BAR_3]);
ntb->bar_info[NTB_BAR_3].xlat_off = AMD_BAR45XLAT_OFFSET;
ntb->bar_info[NTB_BAR_3].limit_off = AMD_BAR45LMT_OFFSET;