1 /* SPDX-License-Identifier: GPL-2.0-only */ 2 3 #include <amdblocks/data_fabric.h> 4 #include <amdblocks/root_complex.h> 5 #include <console/console.h> 6 #include <device/device.h> 7 #include <types.h> 8 data_fabric_get_pci_bus_numbers(struct device * domain,uint8_t * segment_group,uint8_t * first_bus,uint8_t * last_bus)9enum cb_err data_fabric_get_pci_bus_numbers(struct device *domain, uint8_t *segment_group, 10 uint8_t *first_bus, uint8_t *last_bus) 11 { 12 const signed int iohc_dest_fabric_id = get_iohc_fabric_id(domain); 13 union df_pci_cfg_map pci_bus_map; 14 15 for (unsigned int i = 0; i < DF_PCI_CFG_MAP_COUNT; i++) { 16 pci_bus_map.raw = data_fabric_broadcast_read32(DF_PCI_CFG_MAP(i)); 17 18 if (pci_bus_map.dst_fabric_id != iohc_dest_fabric_id) 19 continue; 20 21 if (pci_bus_map.we && pci_bus_map.re) { 22 *segment_group = 0; 23 *first_bus = pci_bus_map.bus_num_base; 24 *last_bus = pci_bus_map.bus_num_limit; 25 return CB_SUCCESS; 26 } 27 } 28 29 printk(BIOS_ERR, "No valid DF PCI CFG register found for domain %x.\n", 30 domain->path.domain.domain); 31 return CB_ERR; 32 } 33