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/x86_init.h> 11 12 #ifdef __KERNEL__ 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_IRQ_DOMAIN 24 void *fwnode; /* IRQ domain for MSI assignment */ 25 #endif 26 #if IS_ENABLED(CONFIG_VMD) 27 bool vmd_domain; /* True if in Intel VMD domain */ 28 #endif 29 }; 30 31 extern int pci_routeirq; 32 extern int noioapicquirk; 33 extern int noioapicreroute; 34 35 #ifdef CONFIG_PCI 36 37 #ifdef CONFIG_PCI_DOMAINS 38 static inline int pci_domain_nr(struct pci_bus *bus) 39 { 40 struct pci_sysdata *sd = bus->sysdata; 41 42 return sd->domain; 43 } 44 45 static inline int pci_proc_domain(struct pci_bus *bus) 46 { 47 return pci_domain_nr(bus); 48 } 49 #endif 50 51 #ifdef CONFIG_PCI_MSI_IRQ_DOMAIN 52 static inline void *_pci_root_bus_fwnode(struct pci_bus *bus) 53 { 54 struct pci_sysdata *sd = bus->sysdata; 55 56 return sd->fwnode; 57 } 58 59 #define pci_root_bus_fwnode _pci_root_bus_fwnode 60 #endif 61 62 static inline bool is_vmd(struct pci_bus *bus) 63 { 64 #if IS_ENABLED(CONFIG_VMD) 65 struct pci_sysdata *sd = bus->sysdata; 66 67 return sd->vmd_domain; 68 #else 69 return false; 70 #endif 71 } 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 # ifdef CONFIG_ACPI 80 # define x86_default_pci_init pci_acpi_init 81 # else 82 # define x86_default_pci_init pci_legacy_init 83 # endif 84 #else 85 # define pcibios_assign_all_busses() 0 86 # define x86_default_pci_init NULL 87 #endif 88 89 extern unsigned long pci_mem_start; 90 #define PCIBIOS_MIN_IO 0x1000 91 #define PCIBIOS_MIN_MEM (pci_mem_start) 92 93 #define PCIBIOS_MIN_CARDBUS_IO 0x4000 94 95 extern int pcibios_enabled; 96 void pcibios_config_init(void); 97 void pcibios_scan_root(int bus); 98 99 void pcibios_set_master(struct pci_dev *dev); 100 struct irq_routing_table *pcibios_get_irq_routing_table(void); 101 int pcibios_set_irq_routing(struct pci_dev *dev, int pin, int irq); 102 103 104 #define HAVE_PCI_MMAP 105 extern int pci_mmap_page_range(struct pci_dev *dev, struct vm_area_struct *vma, 106 enum pci_mmap_state mmap_state, 107 int write_combine); 108 109 110 #ifdef CONFIG_PCI 111 extern void early_quirks(void); 112 #else 113 static inline void early_quirks(void) { } 114 #endif 115 116 extern void pci_iommu_alloc(void); 117 118 #ifdef CONFIG_PCI_MSI 119 /* implemented in arch/x86/kernel/apic/io_apic. */ 120 struct msi_desc; 121 int native_setup_msi_irqs(struct pci_dev *dev, int nvec, int type); 122 void native_teardown_msi_irq(unsigned int irq); 123 void native_restore_msi_irqs(struct pci_dev *dev); 124 #else 125 #define native_setup_msi_irqs NULL 126 #define native_teardown_msi_irq NULL 127 #endif 128 129 #define PCI_DMA_BUS_IS_PHYS (dma_ops->is_phys) 130 131 #endif /* __KERNEL__ */ 132 133 #ifdef CONFIG_X86_64 134 #include <asm/pci_64.h> 135 #endif 136 137 /* generic pci stuff */ 138 #include <asm-generic/pci.h> 139 140 #ifdef CONFIG_NUMA 141 /* Returns the node based on pci bus */ 142 static inline int __pcibus_to_node(const struct pci_bus *bus) 143 { 144 const struct pci_sysdata *sd = bus->sysdata; 145 146 return sd->node; 147 } 148 149 static inline const struct cpumask * 150 cpumask_of_pcibus(const struct pci_bus *bus) 151 { 152 int node; 153 154 node = __pcibus_to_node(bus); 155 return (node == -1) ? cpu_online_mask : 156 cpumask_of_node(node); 157 } 158 #endif 159 160 struct pci_setup_rom { 161 struct setup_data data; 162 uint16_t vendor; 163 uint16_t devid; 164 uint64_t pcilen; 165 unsigned long segment; 166 unsigned long bus; 167 unsigned long device; 168 unsigned long function; 169 uint8_t romdata[0]; 170 }; 171 172 #endif /* _ASM_X86_PCI_H */ 173