blob: 3e02d961486437cb6e808964a158a751a98a0e6b [file] [log] [blame]
Felix Heldea831392023-08-08 02:55:09 +02001/* SPDX-License-Identifier: GPL-2.0-only */
2
3#include <amdblocks/data_fabric.h>
Felix Held9cbdc8f2023-08-11 22:30:06 +02004#include <amdblocks/root_complex.h>
Felix Held55822d92023-08-08 21:38:07 +02005#include <console/console.h>
Felix Heldea831392023-08-08 02:55:09 +02006#include <device/device.h>
7#include <types.h>
8
Felix Held6c00a6a2023-12-06 23:40:42 +01009enum cb_err data_fabric_get_pci_bus_numbers(struct device *domain, uint8_t *segment_group,
10 uint8_t *first_bus, uint8_t *last_bus)
Felix Heldea831392023-08-08 02:55:09 +020011{
Felix Held9cbdc8f2023-08-11 22:30:06 +020012 const signed int iohc_dest_fabric_id = get_iohc_fabric_id(domain);
Felix Heldea831392023-08-08 02:55:09 +020013 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
Felix Held9cbdc8f2023-08-11 22:30:06 +020018 if (pci_bus_map.dst_fabric_id != iohc_dest_fabric_id)
Felix Held55822d92023-08-08 21:38:07 +020019 continue;
20
Felix Heldea831392023-08-08 02:55:09 +020021 if (pci_bus_map.we && pci_bus_map.re) {
Felix Held6c00a6a2023-12-06 23:40:42 +010022 *segment_group = 0;
Felix Heldea831392023-08-08 02:55:09 +020023 *first_bus = pci_bus_map.bus_num_base;
24 *last_bus = pci_bus_map.bus_num_limit;
25 return CB_SUCCESS;
26 }
27 }
28
Felix Held55822d92023-08-08 21:38:07 +020029 printk(BIOS_ERR, "No valid DF PCI CFG register found for domain %x.\n",
30 domain->path.domain.domain);
Felix Heldea831392023-08-08 02:55:09 +020031 return CB_ERR;
32}