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/memtype.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 struct pci_dev *vmd_dev; /* VMD Device if in Intel VMD domain */ 29#endif 30}; 31 32extern int pci_routeirq; 33extern int noioapicquirk; 34extern int noioapicreroute; 35 36static inline struct pci_sysdata *to_pci_sysdata(const struct pci_bus *bus) 37{ 38 return bus->sysdata; 39} 40 41#ifdef CONFIG_PCI 42 43#ifdef CONFIG_PCI_DOMAINS 44static inline int pci_domain_nr(struct pci_bus *bus) 45{ 46 return to_pci_sysdata(bus)->domain; 47} 48 49static inline int pci_proc_domain(struct pci_bus *bus) 50{ 51 return pci_domain_nr(bus); 52} 53#endif 54 55#ifdef CONFIG_PCI_MSI_IRQ_DOMAIN 56static inline void *_pci_root_bus_fwnode(struct pci_bus *bus) 57{ 58 return to_pci_sysdata(bus)->fwnode; 59} 60 61#define pci_root_bus_fwnode _pci_root_bus_fwnode 62#endif 63 64#if IS_ENABLED(CONFIG_VMD) 65static inline bool is_vmd(struct pci_bus *bus) 66{ 67 return to_pci_sysdata(bus)->vmd_dev != NULL; 68} 69#else 70#define is_vmd(bus) false 71#endif /* CONFIG_VMD */ 72 73/* Can be used to override the logic in pci_scan_bus for skipping 74 already-configured bus numbers - to be used for buggy BIOSes 75 or architectures with incomplete PCI setup by the loader */ 76 77extern unsigned int pcibios_assign_all_busses(void); 78extern int pci_legacy_init(void); 79#else 80static inline int pcibios_assign_all_busses(void) { return 0; } 81#endif 82 83extern unsigned long pci_mem_start; 84#define PCIBIOS_MIN_IO 0x1000 85#define PCIBIOS_MIN_MEM (pci_mem_start) 86 87#define PCIBIOS_MIN_CARDBUS_IO 0x4000 88 89extern int pcibios_enabled; 90void pcibios_scan_root(int bus); 91 92struct irq_routing_table *pcibios_get_irq_routing_table(void); 93int pcibios_set_irq_routing(struct pci_dev *dev, int pin, int irq); 94 95 96#define HAVE_PCI_MMAP 97#define arch_can_pci_mmap_wc() pat_enabled() 98#define ARCH_GENERIC_PCI_MMAP_RESOURCE 99 100#ifdef CONFIG_PCI 101extern void early_quirks(void); 102#else 103static inline void early_quirks(void) { } 104#endif 105 106extern void pci_iommu_alloc(void); 107 108/* generic pci stuff */ 109#include <asm-generic/pci.h> 110 111#ifdef CONFIG_NUMA 112/* Returns the node based on pci bus */ 113static inline int __pcibus_to_node(const struct pci_bus *bus) 114{ 115 return to_pci_sysdata(bus)->node; 116} 117 118static inline const struct cpumask * 119cpumask_of_pcibus(const struct pci_bus *bus) 120{ 121 int node; 122 123 node = __pcibus_to_node(bus); 124 return (node == NUMA_NO_NODE) ? cpu_online_mask : 125 cpumask_of_node(node); 126} 127#endif 128 129struct pci_setup_rom { 130 struct setup_data data; 131 uint16_t vendor; 132 uint16_t devid; 133 uint64_t pcilen; 134 unsigned long segment; 135 unsigned long bus; 136 unsigned long device; 137 unsigned long function; 138 uint8_t romdata[0]; 139}; 140 141#endif /* _ASM_X86_PCI_H */ 142