162306a36Sopenharmony_ci// SPDX-License-Identifier: GPL-2.0 262306a36Sopenharmony_ci#include <linux/pci.h> 362306a36Sopenharmony_ci#include <linux/init.h> 462306a36Sopenharmony_ci#include <asm/pci_x86.h> 562306a36Sopenharmony_ci#include <asm/x86_init.h> 662306a36Sopenharmony_ci#include <asm/irqdomain.h> 762306a36Sopenharmony_ci 862306a36Sopenharmony_ci/* arch_initcall has too random ordering, so call the initializers 962306a36Sopenharmony_ci in the right sequence from here. */ 1062306a36Sopenharmony_cistatic __init int pci_arch_init(void) 1162306a36Sopenharmony_ci{ 1262306a36Sopenharmony_ci int type, pcbios = 1; 1362306a36Sopenharmony_ci 1462306a36Sopenharmony_ci type = pci_direct_probe(); 1562306a36Sopenharmony_ci 1662306a36Sopenharmony_ci if (!(pci_probe & PCI_PROBE_NOEARLY)) 1762306a36Sopenharmony_ci pci_mmcfg_early_init(); 1862306a36Sopenharmony_ci 1962306a36Sopenharmony_ci if (x86_init.pci.arch_init) 2062306a36Sopenharmony_ci pcbios = x86_init.pci.arch_init(); 2162306a36Sopenharmony_ci 2262306a36Sopenharmony_ci /* 2362306a36Sopenharmony_ci * Must happen after x86_init.pci.arch_init(). Xen sets up the 2462306a36Sopenharmony_ci * x86_init.irqs.create_pci_msi_domain there. 2562306a36Sopenharmony_ci */ 2662306a36Sopenharmony_ci x86_create_pci_msi_domain(); 2762306a36Sopenharmony_ci 2862306a36Sopenharmony_ci if (!pcbios) 2962306a36Sopenharmony_ci return 0; 3062306a36Sopenharmony_ci 3162306a36Sopenharmony_ci pci_pcbios_init(); 3262306a36Sopenharmony_ci 3362306a36Sopenharmony_ci /* 3462306a36Sopenharmony_ci * don't check for raw_pci_ops here because we want pcbios as last 3562306a36Sopenharmony_ci * fallback, yet it's needed to run first to set pcibios_last_bus 3662306a36Sopenharmony_ci * in case legacy PCI probing is used. otherwise detecting peer busses 3762306a36Sopenharmony_ci * fails. 3862306a36Sopenharmony_ci */ 3962306a36Sopenharmony_ci pci_direct_init(type); 4062306a36Sopenharmony_ci 4162306a36Sopenharmony_ci if (!raw_pci_ops && !raw_pci_ext_ops) 4262306a36Sopenharmony_ci printk(KERN_ERR 4362306a36Sopenharmony_ci "PCI: Fatal: No config space access function found\n"); 4462306a36Sopenharmony_ci 4562306a36Sopenharmony_ci dmi_check_pciprobe(); 4662306a36Sopenharmony_ci 4762306a36Sopenharmony_ci dmi_check_skip_isa_align(); 4862306a36Sopenharmony_ci 4962306a36Sopenharmony_ci return 0; 5062306a36Sopenharmony_ci} 5162306a36Sopenharmony_ciarch_initcall(pci_arch_init); 52