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

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source code of linux/arch/x86/include/asm/pci.h