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/pat.h> 13 #include <asm/x86_init.h> 14 15 #ifdef __KERNEL__ 16 17 struct pci_sysdata { 18 int domain; /* PCI domain */ 19 int node; /* NUMA node */ 20 #ifdef CONFIG_ACPI 21 struct acpi_device *companion; /* ACPI companion device */ 22 #endif 23 #ifdef CONFIG_X86_64 24 void *iommu; /* IOMMU private data */ 25 #endif 26 #ifdef CONFIG_PCI_MSI_IRQ_DOMAIN 27 void *fwnode; /* IRQ domain for MSI assignment */ 28 #endif 29 #if IS_ENABLED(CONFIG_VMD) 30 bool vmd_domain; /* True if in Intel VMD domain */ 31 #endif 32 }; 33 34 extern int pci_routeirq; 35 extern int noioapicquirk; 36 extern int noioapicreroute; 37 38 #ifdef CONFIG_PCI 39 40 #ifdef CONFIG_PCI_DOMAINS 41 static inline int pci_domain_nr(struct pci_bus *bus) 42 { 43 struct pci_sysdata *sd = bus->sysdata; 44 45 return sd->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_IRQ_DOMAIN 55 static inline void *_pci_root_bus_fwnode(struct pci_bus *bus) 56 { 57 struct pci_sysdata *sd = bus->sysdata; 58 59 return sd->fwnode; 60 } 61 62 #define pci_root_bus_fwnode _pci_root_bus_fwnode 63 #endif 64 65 static inline bool is_vmd(struct pci_bus *bus) 66 { 67 #if IS_ENABLED(CONFIG_VMD) 68 struct pci_sysdata *sd = bus->sysdata; 69 70 return sd->vmd_domain; 71 #else 72 return false; 73 #endif 74 } 75 76 /* Can be used to override the logic in pci_scan_bus for skipping 77 already-configured bus numbers - to be used for buggy BIOSes 78 or architectures with incomplete PCI setup by the loader */ 79 80 extern unsigned int pcibios_assign_all_busses(void); 81 extern int pci_legacy_init(void); 82 #else 83 static inline int pcibios_assign_all_busses(void) { return 0; } 84 #endif 85 86 extern unsigned long pci_mem_start; 87 #define PCIBIOS_MIN_IO 0x1000 88 #define PCIBIOS_MIN_MEM (pci_mem_start) 89 90 #define PCIBIOS_MIN_CARDBUS_IO 0x4000 91 92 extern int pcibios_enabled; 93 void pcibios_scan_root(int bus); 94 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 #endif /* __KERNEL__ */ 122 123 #ifdef CONFIG_X86_64 124 #include <asm/pci_64.h> 125 #endif 126 127 /* generic pci stuff */ 128 #include <asm-generic/pci.h> 129 130 #ifdef CONFIG_NUMA 131 /* Returns the node based on pci bus */ 132 static inline int __pcibus_to_node(const struct pci_bus *bus) 133 { 134 const struct pci_sysdata *sd = bus->sysdata; 135 136 return sd->node; 137 } 138 139 static inline const struct cpumask * 140 cpumask_of_pcibus(const struct pci_bus *bus) 141 { 142 int node; 143 144 node = __pcibus_to_node(bus); 145 return (node == NUMA_NO_NODE) ? cpu_online_mask : 146 cpumask_of_node(node); 147 } 148 #endif 149 150 struct pci_setup_rom { 151 struct setup_data data; 152 uint16_t vendor; 153 uint16_t devid; 154 uint64_t pcilen; 155 unsigned long segment; 156 unsigned long bus; 157 unsigned long device; 158 unsigned long function; 159 uint8_t romdata[0]; 160 }; 161 162 #endif /* _ASM_X86_PCI_H */ 163