1/* SPDX-License-Identifier: GPL-2.0 */ 2#ifndef _ASM_X86_PCI_H 3#define _ASM_X86_PCI_H 4 5#include <linux/mm.h> /* for struct page */ 6#include <linux/types.h> 7#include <linux/slab.h> 8#include <linux/string.h> 9#include <linux/scatterlist.h> 10#include <linux/numa.h> 11#include <asm/io.h> 12#include <asm/memtype.h> 13 14struct pci_sysdata { 15 int domain; /* PCI domain */ 16 int node; /* NUMA node */ 17#ifdef CONFIG_ACPI 18 struct acpi_device *companion; /* ACPI companion device */ 19#endif 20#ifdef CONFIG_X86_64 21 void *iommu; /* IOMMU private data */ 22#endif 23#ifdef CONFIG_PCI_MSI 24 void *fwnode; /* IRQ domain for MSI assignment */ 25#endif 26#if IS_ENABLED(CONFIG_VMD) 27 struct pci_dev *vmd_dev; /* VMD Device if in Intel VMD domain */ 28#endif 29}; 30 31extern int pci_routeirq; 32extern int noioapicquirk; 33extern int noioapicreroute; 34 35static inline struct pci_sysdata *to_pci_sysdata(const struct pci_bus *bus) 36{ 37 return bus->sysdata; 38} 39 40#ifdef CONFIG_PCI 41 42#ifdef CONFIG_PCI_DOMAINS 43static inline int pci_domain_nr(struct pci_bus *bus) 44{ 45 return to_pci_sysdata(bus)->domain; 46} 47 48static inline int pci_proc_domain(struct pci_bus *bus) 49{ 50 return pci_domain_nr(bus); 51} 52#endif 53 54#ifdef CONFIG_PCI_MSI 55static inline void *_pci_root_bus_fwnode(struct pci_bus *bus) 56{ 57 return to_pci_sysdata(bus)->fwnode; 58} 59 60#define pci_root_bus_fwnode _pci_root_bus_fwnode 61#endif 62 63#if IS_ENABLED(CONFIG_VMD) 64static inline bool is_vmd(struct pci_bus *bus) 65{ 66 return to_pci_sysdata(bus)->vmd_dev != NULL; 67} 68#else 69#define is_vmd(bus) false 70#endif /* CONFIG_VMD */ 71 72/* Can be used to override the logic in pci_scan_bus for skipping 73 already-configured bus numbers - to be used for buggy BIOSes 74 or architectures with incomplete PCI setup by the loader */ 75 76extern unsigned int pcibios_assign_all_busses(void); 77extern int pci_legacy_init(void); 78#else 79static inline int pcibios_assign_all_busses(void) { return 0; } 80#endif 81 82extern unsigned long pci_mem_start; 83#define PCIBIOS_MIN_IO 0x1000 84#define PCIBIOS_MIN_MEM (pci_mem_start) 85 86#define PCIBIOS_MIN_CARDBUS_IO 0x4000 87 88extern int pcibios_enabled; 89void pcibios_scan_root(int bus); 90 91struct irq_routing_table *pcibios_get_irq_routing_table(void); 92int pcibios_set_irq_routing(struct pci_dev *dev, int pin, int irq); 93 94bool pci_dev_has_default_msi_parent_domain(struct pci_dev *dev); 95 96#define HAVE_PCI_MMAP 97#define arch_can_pci_mmap_wc() pat_enabled() 98#define ARCH_GENERIC_PCI_MMAP_RESOURCE 99 100#ifdef CONFIG_PCI 101extern void early_quirks(void); 102#else 103static inline void early_quirks(void) { } 104#endif 105 106extern void pci_iommu_alloc(void); 107 108#ifdef CONFIG_NUMA 109/* Returns the node based on pci bus */ 110static inline int __pcibus_to_node(const struct pci_bus *bus) 111{ 112 return to_pci_sysdata(bus)->node; 113} 114 115static inline const struct cpumask * 116cpumask_of_pcibus(const struct pci_bus *bus) 117{ 118 int node; 119 120 node = __pcibus_to_node(bus); 121 return (node == NUMA_NO_NODE) ? cpu_online_mask : 122 cpumask_of_node(node); 123} 124#endif 125 126#endif /* _ASM_X86_PCI_H */ 127