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 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_scan_root(int bus); 92 93 struct irq_routing_table *pcibios_get_irq_routing_table(void); 94 int pcibios_set_irq_routing(struct pci_dev *dev, int pin, int irq); 95 96 97 #define HAVE_PCI_MMAP 98 #define arch_can_pci_mmap_wc() pat_enabled() 99 #define ARCH_GENERIC_PCI_MMAP_RESOURCE 100 101 #ifdef CONFIG_PCI 102 extern void early_quirks(void); 103 #else 104 static inline void early_quirks(void) { } 105 #endif 106 107 extern void pci_iommu_alloc(void); 108 109 #ifdef CONFIG_PCI_MSI 110 /* implemented in arch/x86/kernel/apic/io_apic. */ 111 struct msi_desc; 112 int native_setup_msi_irqs(struct pci_dev *dev, int nvec, int type); 113 void native_teardown_msi_irq(unsigned int irq); 114 void native_restore_msi_irqs(struct pci_dev *dev); 115 #else 116 #define native_setup_msi_irqs NULL 117 #define native_teardown_msi_irq NULL 118 #endif 119 120 /* generic pci stuff */ 121 #include <asm-generic/pci.h> 122 123 #ifdef CONFIG_NUMA 124 /* Returns the node based on pci bus */ 125 static inline int __pcibus_to_node(const struct pci_bus *bus) 126 { 127 const struct pci_sysdata *sd = bus->sysdata; 128 129 return sd->node; 130 } 131 132 static inline const struct cpumask * 133 cpumask_of_pcibus(const struct pci_bus *bus) 134 { 135 int node; 136 137 node = __pcibus_to_node(bus); 138 return (node == NUMA_NO_NODE) ? cpu_online_mask : 139 cpumask_of_node(node); 140 } 141 #endif 142 143 struct pci_setup_rom { 144 struct setup_data data; 145 uint16_t vendor; 146 uint16_t devid; 147 uint64_t pcilen; 148 unsigned long segment; 149 unsigned long bus; 150 unsigned long device; 151 unsigned long function; 152 uint8_t romdata[0]; 153 }; 154 155 #endif /* _ASM_X86_PCI_H */ 156