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 15struct 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 32extern int pci_routeirq; 33extern int noioapicquirk; 34extern int noioapicreroute; 35 36#ifdef CONFIG_PCI 37 38#ifdef CONFIG_PCI_DOMAINS 39static inline int pci_domain_nr(struct pci_bus *bus) 40{ 41 struct pci_sysdata *sd = bus->sysdata; 42 43 return sd->domain; 44} 45 46static 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 53static 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 63static 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 78extern unsigned int pcibios_assign_all_busses(void); 79extern int pci_legacy_init(void); 80#else 81static inline int pcibios_assign_all_busses(void) { return 0; } 82#endif 83 84extern 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 90extern int pcibios_enabled; 91void pcibios_scan_root(int bus); 92 93struct irq_routing_table *pcibios_get_irq_routing_table(void); 94int 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 102extern void early_quirks(void); 103#else 104static inline void early_quirks(void) { } 105#endif 106 107extern void pci_iommu_alloc(void); 108 109#ifdef CONFIG_PCI_MSI 110/* implemented in arch/x86/kernel/apic/io_apic. */ 111struct msi_desc; 112int native_setup_msi_irqs(struct pci_dev *dev, int nvec, int type); 113void native_teardown_msi_irq(unsigned int irq); 114void 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 */ 125static 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 132static inline const struct cpumask * 133cpumask_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 143struct 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