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 14 struct 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 31 extern int pci_routeirq; 32 extern int noioapicquirk; 33 extern int noioapicreroute; 34 35 static 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 43 static inline int pci_domain_nr(struct pci_bus *bus) 44 { 45 return to_pci_sysdata(bus)->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 55 static 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) 64 static 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 76 extern unsigned int pcibios_assign_all_busses(void); 77 extern int pci_legacy_init(void); 78 #else 79 static inline int pcibios_assign_all_busses(void) { return 0; } 80 #endif 81 82 extern 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 88 extern int pcibios_enabled; 89 void pcibios_scan_root(int bus); 90 91 struct irq_routing_table *pcibios_get_irq_routing_table(void); 92 int pcibios_set_irq_routing(struct pci_dev *dev, int pin, int irq); 93 94 bool 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 101 extern void early_quirks(void); 102 #else 103 static inline void early_quirks(void) { } 104 #endif 105 106 extern void pci_iommu_alloc(void); 107 108 #ifdef CONFIG_NUMA 109 /* Returns the node based on pci bus */ 110 static inline int __pcibus_to_node(const struct pci_bus *bus) 111 { 112 return to_pci_sysdata(bus)->node; 113 } 114 115 static inline const struct cpumask * 116 cpumask_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 */ 127