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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 */
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 <asm/io.h>
11#include <asm/pat.h>
12#include <asm/x86_init.h>
13
14#ifdef __KERNEL__
15
16struct pci_sysdata {
17 int domain; /* PCI domain */
18 int node; /* NUMA node */
19#ifdef CONFIG_ACPI
20 struct acpi_device *companion; /* ACPI companion device */
21#endif
22#ifdef CONFIG_X86_64
23 void *iommu; /* IOMMU private data */
24#endif
25#ifdef CONFIG_PCI_MSI_IRQ_DOMAIN
26 void *fwnode; /* IRQ domain for MSI assignment */
27#endif
28#if IS_ENABLED(CONFIG_VMD)
29 bool vmd_domain; /* True if in Intel VMD domain */
30#endif
31};
32
33extern int pci_routeirq;
34extern int noioapicquirk;
35extern int noioapicreroute;
36
37#ifdef CONFIG_PCI
38
39#ifdef CONFIG_PCI_DOMAINS
40static inline int pci_domain_nr(struct pci_bus *bus)
41{
42 struct pci_sysdata *sd = bus->sysdata;
43
44 return sd->domain;
45}
46
47static inline int pci_proc_domain(struct pci_bus *bus)
48{
49 return pci_domain_nr(bus);
50}
51#endif
52
53#ifdef CONFIG_PCI_MSI_IRQ_DOMAIN
54static inline void *_pci_root_bus_fwnode(struct pci_bus *bus)
55{
56 struct pci_sysdata *sd = bus->sysdata;
57
58 return sd->fwnode;
59}
60
61#define pci_root_bus_fwnode _pci_root_bus_fwnode
62#endif
63
64static inline bool is_vmd(struct pci_bus *bus)
65{
66#if IS_ENABLED(CONFIG_VMD)
67 struct pci_sysdata *sd = bus->sysdata;
68
69 return sd->vmd_domain;
70#else
71 return false;
72#endif
73}
74
75/* Can be used to override the logic in pci_scan_bus for skipping
76 already-configured bus numbers - to be used for buggy BIOSes
77 or architectures with incomplete PCI setup by the loader */
78
79extern unsigned int pcibios_assign_all_busses(void);
80extern int pci_legacy_init(void);
81#else
82static inline int pcibios_assign_all_busses(void) { return 0; }
83#endif
84
85extern unsigned long pci_mem_start;
86#define PCIBIOS_MIN_IO 0x1000
87#define PCIBIOS_MIN_MEM (pci_mem_start)
88
89#define PCIBIOS_MIN_CARDBUS_IO 0x4000
90
91extern int pcibios_enabled;
92void pcibios_scan_root(int bus);
93
94struct irq_routing_table *pcibios_get_irq_routing_table(void);
95int pcibios_set_irq_routing(struct pci_dev *dev, int pin, int irq);
96
97
98#define HAVE_PCI_MMAP
99#define arch_can_pci_mmap_wc() pat_enabled()
100#define ARCH_GENERIC_PCI_MMAP_RESOURCE
101
102#ifdef CONFIG_PCI
103extern void early_quirks(void);
104#else
105static inline void early_quirks(void) { }
106#endif
107
108extern void pci_iommu_alloc(void);
109
110#ifdef CONFIG_PCI_MSI
111/* implemented in arch/x86/kernel/apic/io_apic. */
112struct msi_desc;
113int native_setup_msi_irqs(struct pci_dev *dev, int nvec, int type);
114void native_teardown_msi_irq(unsigned int irq);
115void native_restore_msi_irqs(struct pci_dev *dev);
116#else
117#define native_setup_msi_irqs NULL
118#define native_teardown_msi_irq NULL
119#endif
120
121#define PCI_DMA_BUS_IS_PHYS (dma_ops->is_phys)
122
123#endif /* __KERNEL__ */
124
125#ifdef CONFIG_X86_64
126#include <asm/pci_64.h>
127#endif
128
129/* generic pci stuff */
130#include <asm-generic/pci.h>
131
132#ifdef CONFIG_NUMA
133/* Returns the node based on pci bus */
134static inline int __pcibus_to_node(const struct pci_bus *bus)
135{
136 const struct pci_sysdata *sd = bus->sysdata;
137
138 return sd->node;
139}
140
141static inline const struct cpumask *
142cpumask_of_pcibus(const struct pci_bus *bus)
143{
144 int node;
145
146 node = __pcibus_to_node(bus);
147 return (node == -1) ? cpu_online_mask :
148 cpumask_of_node(node);
149}
150#endif
151
152struct pci_setup_rom {
153 struct setup_data data;
154 uint16_t vendor;
155 uint16_t devid;
156 uint64_t pcilen;
157 unsigned long segment;
158 unsigned long bus;
159 unsigned long device;
160 unsigned long function;
161 uint8_t romdata[0];
162};
163
164#endif /* _ASM_X86_PCI_H */