tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
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linux
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#endif /* __KERNEL__ */
121
122#ifdef CONFIG_X86_64
123#include <asm/pci_64.h>
124#endif
125
126/* generic pci stuff */
127#include <asm-generic/pci.h>
128
129#ifdef CONFIG_NUMA
130/* Returns the node based on pci bus */
131static inline int __pcibus_to_node(const struct pci_bus *bus)
132{
133 const struct pci_sysdata *sd = bus->sysdata;
134
135 return sd->node;
136}
137
138static inline const struct cpumask *
139cpumask_of_pcibus(const struct pci_bus *bus)
140{
141 int node;
142
143 node = __pcibus_to_node(bus);
144 return (node == -1) ? cpu_online_mask :
145 cpumask_of_node(node);
146}
147#endif
148
149struct pci_setup_rom {
150 struct setup_data data;
151 uint16_t vendor;
152 uint16_t devid;
153 uint64_t pcilen;
154 unsigned long segment;
155 unsigned long bus;
156 unsigned long device;
157 unsigned long function;
158 uint8_t romdata[0];
159};
160
161#endif /* _ASM_X86_PCI_H */