1 #ifndef _ASM_X86_PCI_H 2 #define _ASM_X86_PCI_H 3 4 #include <linux/mm.h> /* for struct page */ 5 #include <linux/types.h> 6 #include <linux/slab.h> 7 #include <linux/string.h> 8 #include <linux/scatterlist.h> 9 #include <asm/io.h> 10 #include <asm/pat.h> 11 #include <asm/x86_init.h> 12 13 #ifdef __KERNEL__ 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 bool vmd_domain; /* True if in Intel VMD domain */ 29 #endif 30 }; 31 32 extern int pci_routeirq; 33 extern int noioapicquirk; 34 extern int noioapicreroute; 35 36 #ifdef CONFIG_PCI 37 38 #ifdef CONFIG_PCI_DOMAINS 39 static inline int pci_domain_nr(struct pci_bus *bus) 40 { 41 struct pci_sysdata *sd = bus->sysdata; 42 43 return sd->domain; 44 } 45 46 static inline int pci_proc_domain(struct pci_bus *bus) 47 { 48 return pci_domain_nr(bus); 49 } 50 #endif 51 52 #ifdef CONFIG_PCI_MSI_IRQ_DOMAIN 53 static inline void *_pci_root_bus_fwnode(struct pci_bus *bus) 54 { 55 struct pci_sysdata *sd = bus->sysdata; 56 57 return sd->fwnode; 58 } 59 60 #define pci_root_bus_fwnode _pci_root_bus_fwnode 61 #endif 62 63 static inline bool is_vmd(struct pci_bus *bus) 64 { 65 #if IS_ENABLED(CONFIG_VMD) 66 struct pci_sysdata *sd = bus->sysdata; 67 68 return sd->vmd_domain; 69 #else 70 return false; 71 #endif 72 } 73 74 /* Can be used to override the logic in pci_scan_bus for skipping 75 already-configured bus numbers - to be used for buggy BIOSes 76 or architectures with incomplete PCI setup by the loader */ 77 78 extern unsigned int pcibios_assign_all_busses(void); 79 extern int pci_legacy_init(void); 80 #else 81 static inline int pcibios_assign_all_busses(void) { return 0; } 82 #endif 83 84 extern unsigned long pci_mem_start; 85 #define PCIBIOS_MIN_IO 0x1000 86 #define PCIBIOS_MIN_MEM (pci_mem_start) 87 88 #define PCIBIOS_MIN_CARDBUS_IO 0x4000 89 90 extern int pcibios_enabled; 91 void pcibios_config_init(void); 92 void pcibios_scan_root(int bus); 93 94 void pcibios_set_master(struct pci_dev *dev); 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 121 122 #define PCI_DMA_BUS_IS_PHYS (dma_ops->is_phys) 123 124 #endif /* __KERNEL__ */ 125 126 #ifdef CONFIG_X86_64 127 #include <asm/pci_64.h> 128 #endif 129 130 /* generic pci stuff */ 131 #include <asm-generic/pci.h> 132 133 #ifdef CONFIG_NUMA 134 /* Returns the node based on pci bus */ 135 static inline int __pcibus_to_node(const struct pci_bus *bus) 136 { 137 const struct pci_sysdata *sd = bus->sysdata; 138 139 return sd->node; 140 } 141 142 static inline const struct cpumask * 143 cpumask_of_pcibus(const struct pci_bus *bus) 144 { 145 int node; 146 147 node = __pcibus_to_node(bus); 148 return (node == -1) ? cpu_online_mask : 149 cpumask_of_node(node); 150 } 151 #endif 152 153 struct pci_setup_rom { 154 struct setup_data data; 155 uint16_t vendor; 156 uint16_t devid; 157 uint64_t pcilen; 158 unsigned long segment; 159 unsigned long bus; 160 unsigned long device; 161 unsigned long function; 162 uint8_t romdata[0]; 163 }; 164 165 #endif /* _ASM_X86_PCI_H */ 166