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
14 struct 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
31 extern int pci_routeirq;
32 extern int noioapicquirk;
33 extern int noioapicreroute;
34
35 static 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
43 static inline int pci_domain_nr(struct pci_bus *bus)
44 {
45 return to_pci_sysdata(bus)->domain;
46 }
47
48 static 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
55 static 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)
64 static 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
76 extern unsigned int pcibios_assign_all_busses(void);
77 extern int pci_legacy_init(void);
78 #else
79 static inline int pcibios_assign_all_busses(void) { return 0; }
80 #endif
81
82 extern 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
88 extern int pcibios_enabled;
89 void pcibios_scan_root(int bus);
90
91 struct irq_routing_table *pcibios_get_irq_routing_table(void);
92 int pcibios_set_irq_routing(struct pci_dev *dev, int pin, int irq);
93
94 bool 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
101 extern void early_quirks(void);
102 #else
103 static inline void early_quirks(void) { }
104 #endif
105
106 extern void pci_iommu_alloc(void);
107
108 #ifdef CONFIG_NUMA
109 /* Returns the node based on pci bus */
110 static inline int __pcibus_to_node(const struct pci_bus *bus)
111 {
112 return to_pci_sysdata(bus)->node;
113 }
114
115 static inline const struct cpumask *
116 cpumask_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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