| 1 | // SPDX-License-Identifier: GPL-2.0 |
|---|---|
| 2 | #include <linux/pci.h> |
| 3 | #include <linux/init.h> |
| 4 | #include <asm/pci_x86.h> |
| 5 | #include <asm/x86_init.h> |
| 6 | #include <asm/irqdomain.h> |
| 7 | |
| 8 | /* arch_initcall has too random ordering, so call the initializers |
| 9 | in the right sequence from here. */ |
| 10 | static __init int pci_arch_init(void) |
| 11 | { |
| 12 | int type, pcbios = 1; |
| 13 | |
| 14 | type = pci_direct_probe(); |
| 15 | |
| 16 | if (!(pci_probe & PCI_PROBE_NOEARLY)) |
| 17 | pci_mmcfg_early_init(); |
| 18 | |
| 19 | if (x86_init.pci.arch_init) |
| 20 | pcbios = x86_init.pci.arch_init(); |
| 21 | |
| 22 | /* |
| 23 | * Must happen after x86_init.pci.arch_init(). Xen sets up the |
| 24 | * x86_init.irqs.create_pci_msi_domain there. |
| 25 | */ |
| 26 | x86_create_pci_msi_domain(); |
| 27 | |
| 28 | if (!pcbios) |
| 29 | return 0; |
| 30 | |
| 31 | pci_pcbios_init(); |
| 32 | |
| 33 | /* |
| 34 | * don't check for raw_pci_ops here because we want pcbios as last |
| 35 | * fallback, yet it's needed to run first to set pcibios_last_bus |
| 36 | * in case legacy PCI probing is used. otherwise detecting peer busses |
| 37 | * fails. |
| 38 | */ |
| 39 | pci_direct_init(type); |
| 40 | |
| 41 | if (!raw_pci_ops && !raw_pci_ext_ops) |
| 42 | printk(KERN_ERR |
| 43 | "PCI: Fatal: No config space access function found\n"); |
| 44 | |
| 45 | dmi_check_pciprobe(); |
| 46 | |
| 47 | dmi_check_skip_isa_align(); |
| 48 | |
| 49 | return 0; |
| 50 | } |
| 51 | arch_initcall(pci_arch_init); |
| 52 |