| /* SPDX-License-Identifier: GPL-2.0-only */ |
| |
| #include <amdblocks/data_fabric.h> |
| #include <amdblocks/root_complex.h> |
| #include <console/console.h> |
| #include <device/device.h> |
| #include <types.h> |
| |
| enum cb_err data_fabric_get_pci_bus_numbers(struct device *domain, uint8_t *segment_group, |
| uint8_t *first_bus, uint8_t *last_bus) |
| { |
| const signed int iohc_dest_fabric_id = get_iohc_fabric_id(domain); |
| union df_pci_cfg_base pci_bus_base; |
| union df_pci_cfg_limit pci_bus_limit; |
| |
| for (unsigned int i = 0; i < DF_PCI_CFG_MAP_COUNT; i++) { |
| pci_bus_base.raw = data_fabric_broadcast_read32(DF_PCI_CFG_BASE(i)); |
| pci_bus_limit.raw = data_fabric_broadcast_read32(DF_PCI_CFG_LIMIT(i)); |
| |
| if (pci_bus_limit.dst_fabric_id != iohc_dest_fabric_id) |
| continue; |
| |
| if (pci_bus_base.we && pci_bus_base.re) { |
| *segment_group = pci_bus_base.segment_num; |
| *first_bus = pci_bus_base.bus_num_base; |
| *last_bus = pci_bus_limit.bus_num_limit; |
| return CB_SUCCESS; |
| } |
| } |
| |
| printk(BIOS_ERR, "No valid DF PCI CFG register pair found for domain %x.\n", |
| domain->path.domain.domain); |
| return CB_ERR; |
| } |