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 17struct 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 34extern int pci_routeirq; 35extern int noioapicquirk; 36extern int noioapicreroute; 37 38#ifdef CONFIG_PCI 39 40#ifdef CONFIG_PCI_DOMAINS 41static inline int pci_domain_nr(struct pci_bus *bus) 42{ 43 struct pci_sysdata *sd = bus->sysdata; 44 45 return sd->domain; 46} 47 48static 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 55static 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 65static 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 80extern unsigned int pcibios_assign_all_busses(void); 81extern int pci_legacy_init(void); 82#else 83static inline int pcibios_assign_all_busses(void) { return 0; } 84#endif 85 86extern 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 92extern int pcibios_enabled; 93void pcibios_scan_root(int bus); 94 95struct irq_routing_table *pcibios_get_irq_routing_table(void); 96int 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 104extern void early_quirks(void); 105#else 106static inline void early_quirks(void) { } 107#endif 108 109extern void pci_iommu_alloc(void); 110 111#ifdef CONFIG_PCI_MSI 112/* implemented in arch/x86/kernel/apic/io_apic. */ 113struct msi_desc; 114int native_setup_msi_irqs(struct pci_dev *dev, int nvec, int type); 115void native_teardown_msi_irq(unsigned int irq); 116void 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 */ 132static 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 139static inline const struct cpumask * 140cpumask_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 150struct 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