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