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 <asm/io.h> 11 #include <asm/pat.h> 12 #include <asm/x86_init.h> 13 14 #ifdef __KERNEL__ 15 16 struct pci_sysdata { 17 int domain; /* PCI domain */ 18 int node; /* NUMA node */ 19 #ifdef CONFIG_ACPI 20 struct acpi_device *companion; /* ACPI companion device */ 21 #endif 22 #ifdef CONFIG_X86_64 23 void *iommu; /* IOMMU private data */ 24 #endif 25 #ifdef CONFIG_PCI_MSI_IRQ_DOMAIN 26 void *fwnode; /* IRQ domain for MSI assignment */ 27 #endif 28 #if IS_ENABLED(CONFIG_VMD) 29 bool vmd_domain; /* True if in Intel VMD domain */ 30 #endif 31 }; 32 33 extern int pci_routeirq; 34 extern int noioapicquirk; 35 extern int noioapicreroute; 36 37 #ifdef CONFIG_PCI 38 39 #ifdef CONFIG_PCI_DOMAINS 40 static inline int pci_domain_nr(struct pci_bus *bus) 41 { 42 struct pci_sysdata *sd = bus->sysdata; 43 44 return sd->domain; 45 } 46 47 static inline int pci_proc_domain(struct pci_bus *bus) 48 { 49 return pci_domain_nr(bus); 50 } 51 #endif 52 53 #ifdef CONFIG_PCI_MSI_IRQ_DOMAIN 54 static inline void *_pci_root_bus_fwnode(struct pci_bus *bus) 55 { 56 struct pci_sysdata *sd = bus->sysdata; 57 58 return sd->fwnode; 59 } 60 61 #define pci_root_bus_fwnode _pci_root_bus_fwnode 62 #endif 63 64 static inline bool is_vmd(struct pci_bus *bus) 65 { 66 #if IS_ENABLED(CONFIG_VMD) 67 struct pci_sysdata *sd = bus->sysdata; 68 69 return sd->vmd_domain; 70 #else 71 return false; 72 #endif 73 } 74 75 /* Can be used to override the logic in pci_scan_bus for skipping 76 already-configured bus numbers - to be used for buggy BIOSes 77 or architectures with incomplete PCI setup by the loader */ 78 79 extern unsigned int pcibios_assign_all_busses(void); 80 extern int pci_legacy_init(void); 81 #else 82 static inline int pcibios_assign_all_busses(void) { return 0; } 83 #endif 84 85 extern unsigned long pci_mem_start; 86 #define PCIBIOS_MIN_IO 0x1000 87 #define PCIBIOS_MIN_MEM (pci_mem_start) 88 89 #define PCIBIOS_MIN_CARDBUS_IO 0x4000 90 91 extern int pcibios_enabled; 92 void pcibios_config_init(void); 93 void pcibios_scan_root(int bus); 94 95 void pcibios_set_master(struct pci_dev *dev); 96 struct irq_routing_table *pcibios_get_irq_routing_table(void); 97 int pcibios_set_irq_routing(struct pci_dev *dev, int pin, int irq); 98 99 100 #define HAVE_PCI_MMAP 101 #define arch_can_pci_mmap_wc() pat_enabled() 102 #define ARCH_GENERIC_PCI_MMAP_RESOURCE 103 104 #ifdef CONFIG_PCI 105 extern void early_quirks(void); 106 #else 107 static inline void early_quirks(void) { } 108 #endif 109 110 extern void pci_iommu_alloc(void); 111 112 #ifdef CONFIG_PCI_MSI 113 /* implemented in arch/x86/kernel/apic/io_apic. */ 114 struct msi_desc; 115 int native_setup_msi_irqs(struct pci_dev *dev, int nvec, int type); 116 void native_teardown_msi_irq(unsigned int irq); 117 void native_restore_msi_irqs(struct pci_dev *dev); 118 #else 119 #define native_setup_msi_irqs NULL 120 #define native_teardown_msi_irq NULL 121 #endif 122 123 #define PCI_DMA_BUS_IS_PHYS (dma_ops->is_phys) 124 125 #endif /* __KERNEL__ */ 126 127 #ifdef CONFIG_X86_64 128 #include <asm/pci_64.h> 129 #endif 130 131 /* generic pci stuff */ 132 #include <asm-generic/pci.h> 133 134 #ifdef CONFIG_NUMA 135 /* Returns the node based on pci bus */ 136 static inline int __pcibus_to_node(const struct pci_bus *bus) 137 { 138 const struct pci_sysdata *sd = bus->sysdata; 139 140 return sd->node; 141 } 142 143 static inline const struct cpumask * 144 cpumask_of_pcibus(const struct pci_bus *bus) 145 { 146 int node; 147 148 node = __pcibus_to_node(bus); 149 return (node == -1) ? cpu_online_mask : 150 cpumask_of_node(node); 151 } 152 #endif 153 154 struct pci_setup_rom { 155 struct setup_data data; 156 uint16_t vendor; 157 uint16_t devid; 158 uint64_t pcilen; 159 unsigned long segment; 160 unsigned long bus; 161 unsigned long device; 162 unsigned long function; 163 uint8_t romdata[0]; 164 }; 165 166 #endif /* _ASM_X86_PCI_H */ 167