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#include <asm/x86_init.h>
14
15struct pci_sysdata {
16 int domain; /* PCI domain */
17 int node; /* NUMA node */
18#ifdef CONFIG_ACPI
19 struct acpi_device *companion; /* ACPI companion device */
20#endif
21#ifdef CONFIG_X86_64
22 void *iommu; /* IOMMU private data */
23#endif
24#ifdef CONFIG_PCI_MSI
25 void *fwnode; /* IRQ domain for MSI assignment */
26#endif
27#if IS_ENABLED(CONFIG_VMD)
28 struct pci_dev *vmd_dev; /* VMD Device if in Intel VMD domain */
29#endif
30};
31
32extern int pci_routeirq;
33extern int noioapicquirk;
34extern int noioapicreroute;
35
36static inline struct pci_sysdata *to_pci_sysdata(const struct pci_bus *bus)
37{
38 return bus->sysdata;
39}
40
41#ifdef CONFIG_PCI
42
43#ifdef CONFIG_PCI_DOMAINS
44static inline int pci_domain_nr(struct pci_bus *bus)
45{
46 return to_pci_sysdata(bus)->domain;
47}
48
49static inline int pci_proc_domain(struct pci_bus *bus)
50{
51 return pci_domain_nr(bus);
52}
53#endif
54
55#ifdef CONFIG_PCI_MSI
56static inline void *_pci_root_bus_fwnode(struct pci_bus *bus)
57{
58 return to_pci_sysdata(bus)->fwnode;
59}
60
61#define pci_root_bus_fwnode _pci_root_bus_fwnode
62#endif
63
64#if IS_ENABLED(CONFIG_VMD)
65static inline bool is_vmd(struct pci_bus *bus)
66{
67 return to_pci_sysdata(bus)->vmd_dev != NULL;
68}
69#else
70#define is_vmd(bus) false
71#endif /* CONFIG_VMD */
72
73/* Can be used to override the logic in pci_scan_bus for skipping
74 already-configured bus numbers - to be used for buggy BIOSes
75 or architectures with incomplete PCI setup by the loader */
76
77extern unsigned int pcibios_assign_all_busses(void);
78extern int pci_legacy_init(void);
79#else
80static inline int pcibios_assign_all_busses(void) { return 0; }
81#endif
82
83extern unsigned long pci_mem_start;
84#define PCIBIOS_MIN_IO 0x1000
85#define PCIBIOS_MIN_MEM (pci_mem_start)
86
87#define PCIBIOS_MIN_CARDBUS_IO 0x4000
88
89extern int pcibios_enabled;
90void pcibios_scan_root(int bus);
91
92struct irq_routing_table *pcibios_get_irq_routing_table(void);
93int pcibios_set_irq_routing(struct pci_dev *dev, int pin, int irq);
94
95bool pci_dev_has_default_msi_parent_domain(struct pci_dev *dev);
96
97#define HAVE_PCI_MMAP
98#define arch_can_pci_mmap_wc() pat_enabled()
99#define ARCH_GENERIC_PCI_MMAP_RESOURCE
100
101#ifdef CONFIG_PCI
102extern void early_quirks(void);
103#else
104static inline void early_quirks(void) { }
105#endif
106
107extern void pci_iommu_alloc(void);
108
109#ifdef CONFIG_NUMA
110/* Returns the node based on pci bus */
111static inline int __pcibus_to_node(const struct pci_bus *bus)
112{
113 return to_pci_sysdata(bus)->node;
114}
115
116static inline const struct cpumask *
117cpumask_of_pcibus(const struct pci_bus *bus)
118{
119 int node;
120
121 node = __pcibus_to_node(bus);
122 return (node == NUMA_NO_NODE) ? cpu_online_mask :
123 cpumask_of_node(node);
124}
125#endif
126
127struct pci_setup_rom {
128 struct setup_data data;
129 uint16_t vendor;
130 uint16_t devid;
131 uint64_t pcilen;
132 unsigned long segment;
133 unsigned long bus;
134 unsigned long device;
135 unsigned long function;
136 uint8_t romdata[];
137};
138
139#endif /* _ASM_X86_PCI_H */
140

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