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 
15 struct 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 
32 extern int pci_routeirq;
33 extern int noioapicquirk;
34 extern int noioapicreroute;
35 
to_pci_sysdata(const struct pci_bus * bus)36 static 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
pci_domain_nr(struct pci_bus * bus)44 static inline int pci_domain_nr(struct pci_bus *bus)
45 {
46 	return to_pci_sysdata(bus)->domain;
47 }
48 
pci_proc_domain(struct pci_bus * bus)49 static 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
_pci_root_bus_fwnode(struct pci_bus * bus)56 static 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)
is_vmd(struct pci_bus * bus)65 static 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 
77 extern unsigned int pcibios_assign_all_busses(void);
78 extern int pci_legacy_init(void);
79 #else
pcibios_assign_all_busses(void)80 static inline int pcibios_assign_all_busses(void) { return 0; }
81 #endif
82 
83 extern 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 
89 extern int pcibios_enabled;
90 void pcibios_scan_root(int bus);
91 
92 struct irq_routing_table *pcibios_get_irq_routing_table(void);
93 int pcibios_set_irq_routing(struct pci_dev *dev, int pin, int irq);
94 
95 bool 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
102 extern void early_quirks(void);
103 #else
early_quirks(void)104 static inline void early_quirks(void) { }
105 #endif
106 
107 extern void pci_iommu_alloc(void);
108 
109 #ifdef CONFIG_NUMA
110 /* Returns the node based on pci bus */
__pcibus_to_node(const struct pci_bus * bus)111 static inline int __pcibus_to_node(const struct pci_bus *bus)
112 {
113 	return to_pci_sysdata(bus)->node;
114 }
115 
116 static inline const struct cpumask *
cpumask_of_pcibus(const struct pci_bus * bus)117 cpumask_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 
127 struct 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