LXR linux/arch/x86/include/asm/pci.h

   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