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

   1#ifndef _ASM_X86_PCI_H
   2#define _ASM_X86_PCI_H
   3
   4#include <linux/mm.h> /* for struct page */
   5#include <linux/types.h>
   6#include <linux/slab.h>
   7#include <linux/string.h>
   8#include <linux/scatterlist.h>
   9#include <asm/io.h>
  10#include <asm/x86_init.h>
  11
  12#ifdef __KERNEL__
  13
  14struct pci_sysdata {
  15        int             domain;         /* PCI domain */
  16        int             node;           /* NUMA node */
  17#ifdef CONFIG_ACPI
  18        struct acpi_device *companion;  /* ACPI companion device */
  19#endif
  20#ifdef CONFIG_X86_64
  21        void            *iommu;         /* IOMMU private data */
  22#endif
  23#ifdef CONFIG_PCI_MSI_IRQ_DOMAIN
  24        void            *fwnode;        /* IRQ domain for MSI assignment */
  25#endif
  26#if IS_ENABLED(CONFIG_VMD)
  27        bool vmd_domain;                /* True if in Intel VMD domain */
  28#endif
  29};
  30
  31extern int pci_routeirq;
  32extern int noioapicquirk;
  33extern int noioapicreroute;
  34
  35#ifdef CONFIG_PCI
  36
  37#ifdef CONFIG_PCI_DOMAINS
  38static inline int pci_domain_nr(struct pci_bus *bus)
  39{
  40        struct pci_sysdata *sd = bus->sysdata;
  41
  42        return sd->domain;
  43}
  44
  45static inline int pci_proc_domain(struct pci_bus *bus)
  46{
  47        return pci_domain_nr(bus);
  48}
  49#endif
  50
  51#ifdef CONFIG_PCI_MSI_IRQ_DOMAIN
  52static inline void *_pci_root_bus_fwnode(struct pci_bus *bus)
  53{
  54        struct pci_sysdata *sd = bus->sysdata;
  55
  56        return sd->fwnode;
  57}
  58
  59#define pci_root_bus_fwnode     _pci_root_bus_fwnode
  60#endif
  61
  62static inline bool is_vmd(struct pci_bus *bus)
  63{
  64#if IS_ENABLED(CONFIG_VMD)
  65        struct pci_sysdata *sd = bus->sysdata;
  66
  67        return sd->vmd_domain;
  68#else
  69        return false;
  70#endif
  71}
  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# ifdef CONFIG_ACPI
  80#  define x86_default_pci_init pci_acpi_init
  81# else
  82#  define x86_default_pci_init pci_legacy_init
  83# endif
  84#else
  85# define pcibios_assign_all_busses()    0
  86# define x86_default_pci_init           NULL
  87#endif
  88
  89extern unsigned long pci_mem_start;
  90#define PCIBIOS_MIN_IO          0x1000
  91#define PCIBIOS_MIN_MEM         (pci_mem_start)
  92
  93#define PCIBIOS_MIN_CARDBUS_IO  0x4000
  94
  95extern int pcibios_enabled;
  96void pcibios_config_init(void);
  97void pcibios_scan_root(int bus);
  98
  99void pcibios_set_master(struct pci_dev *dev);
 100struct irq_routing_table *pcibios_get_irq_routing_table(void);
 101int pcibios_set_irq_routing(struct pci_dev *dev, int pin, int irq);
 102
 103
 104#define HAVE_PCI_MMAP
 105extern int pci_mmap_page_range(struct pci_dev *dev, struct vm_area_struct *vma,
 106                               enum pci_mmap_state mmap_state,
 107                               int write_combine);
 108
 109
 110#ifdef CONFIG_PCI
 111extern void early_quirks(void);
 112#else
 113static inline void early_quirks(void) { }
 114#endif
 115
 116extern void pci_iommu_alloc(void);
 117
 118#ifdef CONFIG_PCI_MSI
 119/* implemented in arch/x86/kernel/apic/io_apic. */
 120struct msi_desc;
 121int native_setup_msi_irqs(struct pci_dev *dev, int nvec, int type);
 122void native_teardown_msi_irq(unsigned int irq);
 123void native_restore_msi_irqs(struct pci_dev *dev);
 124#else
 125#define native_setup_msi_irqs           NULL
 126#define native_teardown_msi_irq         NULL
 127#endif
 128
 129#define PCI_DMA_BUS_IS_PHYS (dma_ops->is_phys)
 130
 131#endif  /* __KERNEL__ */
 132
 133#ifdef CONFIG_X86_64
 134#include <asm/pci_64.h>
 135#endif
 136
 137/* generic pci stuff */
 138#include <asm-generic/pci.h>
 139
 140#ifdef CONFIG_NUMA
 141/* Returns the node based on pci bus */
 142static inline int __pcibus_to_node(const struct pci_bus *bus)
 143{
 144        const struct pci_sysdata *sd = bus->sysdata;
 145
 146        return sd->node;
 147}
 148
 149static inline const struct cpumask *
 150cpumask_of_pcibus(const struct pci_bus *bus)
 151{
 152        int node;
 153
 154        node = __pcibus_to_node(bus);
 155        return (node == -1) ? cpu_online_mask :
 156                              cpumask_of_node(node);
 157}
 158#endif
 159
 160struct pci_setup_rom {
 161        struct setup_data data;
 162        uint16_t vendor;
 163        uint16_t devid;
 164        uint64_t pcilen;
 165        unsigned long segment;
 166        unsigned long bus;
 167        unsigned long device;
 168        unsigned long function;
 169        uint8_t romdata[0];
 170};
 171
 172#endif /* _ASM_X86_PCI_H */
 173