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 #include <asm/x86_init.h> 14 15 struct pci_sysdata { 16 int domain; /* PCI domain */ 17 int node; /* NUMA node */ 18 #ifdef CONFIG_ACPI 19 struct acpi_device *companion; /* ACPI companion device */ 20 #endif 21 #ifdef CONFIG_X86_64 22 void *iommu; /* IOMMU private data */ 23 #endif 24 #ifdef CONFIG_PCI_MSI_IRQ_DOMAIN 25 void *fwnode; /* IRQ domain for MSI assignment */ 26 #endif 27 #if IS_ENABLED(CONFIG_VMD) 28 struct pci_dev *vmd_dev; /* VMD Device if in Intel VMD domain */ 29 #endif 30 }; 31 32 extern int pci_routeirq; 33 extern int noioapicquirk; 34 extern int noioapicreroute; 35 36 static inline struct pci_sysdata *to_pci_sysdata(const struct pci_bus *bus) 37 { 38 return bus->sysdata; 39 } 40 41 #ifdef CONFIG_PCI 42 43 #ifdef CONFIG_PCI_DOMAINS 44 static inline int pci_domain_nr(struct pci_bus *bus) 45 { 46 return to_pci_sysdata(bus)->domain; 47 } 48 49 static inline int pci_proc_domain(struct pci_bus *bus) 50 { 51 return pci_domain_nr(bus); 52 } 53 #endif 54 55 #ifdef CONFIG_PCI_MSI_IRQ_DOMAIN 56 static inline void *_pci_root_bus_fwnode(struct pci_bus *bus) 57 { 58 return to_pci_sysdata(bus)->fwnode; 59 } 60 61 #define pci_root_bus_fwnode _pci_root_bus_fwnode 62 #endif 63 64 #if IS_ENABLED(CONFIG_VMD) 65 static inline bool is_vmd(struct pci_bus *bus) 66 { 67 return to_pci_sysdata(bus)->vmd_dev != NULL; 68 } 69 #else 70 #define is_vmd(bus) false 71 #endif /* CONFIG_VMD */ 72 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 */ 76 77 extern unsigned int pcibios_assign_all_busses(void); 78 extern int pci_legacy_init(void); 79 #else 80 static inline int pcibios_assign_all_busses(void) { return 0; } 81 #endif 82 83 extern unsigned long pci_mem_start; 84 #define PCIBIOS_MIN_IO 0x1000 85 #define PCIBIOS_MIN_MEM (pci_mem_start) 86 87 #define PCIBIOS_MIN_CARDBUS_IO 0x4000 88 89 extern int pcibios_enabled; 90 void pcibios_scan_root(int bus); 91 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); 94 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 /* generic pci stuff */ 109 #include <asm-generic/pci.h> 110 111 #ifdef CONFIG_NUMA 112 /* Returns the node based on pci bus */ 113 static inline int __pcibus_to_node(const struct pci_bus *bus) 114 { 115 return to_pci_sysdata(bus)->node; 116 } 117 118 static inline const struct cpumask * 119 cpumask_of_pcibus(const struct pci_bus *bus) 120 { 121 int node; 122 123 node = __pcibus_to_node(bus); 124 return (node == NUMA_NO_NODE) ? cpu_online_mask : 125 cpumask_of_node(node); 126 } 127 #endif 128 129 struct pci_setup_rom { 130 struct setup_data data; 131 uint16_t vendor; 132 uint16_t devid; 133 uint64_t pcilen; 134 unsigned long segment; 135 unsigned long bus; 136 unsigned long device; 137 unsigned long function; 138 uint8_t romdata[0]; 139 }; 140 141 #endif /* _ASM_X86_PCI_H */ 142