1 /* SPDX-License-Identifier: GPL-2.0 */
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>
12 #include <asm/memtype.h>
13 #include <asm/x86_init.h>
16 int domain; /* PCI domain */
17 int node; /* NUMA node */
19 struct acpi_device *companion; /* ACPI companion device */
22 void *iommu; /* IOMMU private data */
25 void *fwnode; /* IRQ domain for MSI assignment */
27 #if IS_ENABLED(CONFIG_VMD)
28 struct pci_dev *vmd_dev; /* VMD Device if in Intel VMD domain */
32 extern int pci_routeirq;
33 extern int noioapicquirk;
34 extern int noioapicreroute;
36 static inline struct pci_sysdata *to_pci_sysdata(const struct pci_bus *bus)
43 #ifdef CONFIG_PCI_DOMAINS
44 static inline int pci_domain_nr(struct pci_bus *bus)
46 return to_pci_sysdata(bus)->domain;
49 static inline int pci_proc_domain(struct pci_bus *bus)
51 return pci_domain_nr(bus);
56 static inline void *_pci_root_bus_fwnode(struct pci_bus *bus)
58 return to_pci_sysdata(bus)->fwnode;
61 #define pci_root_bus_fwnode _pci_root_bus_fwnode
64 #if IS_ENABLED(CONFIG_VMD)
65 static inline bool is_vmd(struct pci_bus *bus)
67 return to_pci_sysdata(bus)->vmd_dev != NULL;
70 #define is_vmd(bus) false
71 #endif /* CONFIG_VMD */
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 */
77 extern unsigned int pcibios_assign_all_busses(void);
78 extern int pci_legacy_init(void);
80 static inline int pcibios_assign_all_busses(void) { return 0; }
83 extern unsigned long pci_mem_start;
84 #define PCIBIOS_MIN_IO 0x1000
85 #define PCIBIOS_MIN_MEM (pci_mem_start)
87 #define PCIBIOS_MIN_CARDBUS_IO 0x4000
89 extern int pcibios_enabled;
90 void pcibios_scan_root(int bus);
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);
95 bool pci_dev_has_default_msi_parent_domain(struct pci_dev *dev);
98 #define arch_can_pci_mmap_wc() pat_enabled()
99 #define ARCH_GENERIC_PCI_MMAP_RESOURCE
102 extern void early_quirks(void);
104 static inline void early_quirks(void) { }
107 extern void pci_iommu_alloc(void);
110 /* Returns the node based on pci bus */
111 static inline int __pcibus_to_node(const struct pci_bus *bus)
113 return to_pci_sysdata(bus)->node;
116 static inline const struct cpumask *
117 cpumask_of_pcibus(const struct pci_bus *bus)
121 node = __pcibus_to_node(bus);
122 return (node == NUMA_NO_NODE) ? cpu_online_mask :
123 cpumask_of_node(node);
127 struct pci_setup_rom {
128 struct setup_data data;
132 unsigned long segment;
134 unsigned long device;
135 unsigned long function;
139 #endif /* _ASM_X86_PCI_H */