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/pat.h>
  11 #include <asm/x86_init.h>
  12
  13 #ifdef __KERNEL__
  14
  15 struct 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
  32 extern int pci_routeirq;
  33 extern int noioapicquirk;
  34 extern int noioapicreroute;
  35
  36 #ifdef CONFIG_PCI
  37
  38 #ifdef CONFIG_PCI_DOMAINS
  39 static inline int pci_domain_nr(struct pci_bus *bus)
  40 {
  41         struct pci_sysdata *sd = bus->sysdata;
  42
  43         return sd->domain;
  44 }
  45
  46 static 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
  53 static 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
  63 static 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
  78 extern unsigned int pcibios_assign_all_busses(void);
  79 extern int pci_legacy_init(void);
  80 #else
  81 static inline int pcibios_assign_all_busses(void) { return 0; }
  82 #endif
  83
  84 extern 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
  90 extern int pcibios_enabled;
  91 void pcibios_config_init(void);
  92 void pcibios_scan_root(int bus);
  93
  94 void pcibios_set_master(struct pci_dev *dev);
  95 struct irq_routing_table *pcibios_get_irq_routing_table(void);
  96 int 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
 104 extern void early_quirks(void);
 105 #else
 106 static inline void early_quirks(void) { }
 107 #endif
 108
 109 extern void pci_iommu_alloc(void);
 110
 111 #ifdef CONFIG_PCI_MSI
 112 /* implemented in arch/x86/kernel/apic/io_apic. */
 113 struct msi_desc;
 114 int native_setup_msi_irqs(struct pci_dev *dev, int nvec, int type);
 115 void native_teardown_msi_irq(unsigned int irq);
 116 void 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
 122 #define PCI_DMA_BUS_IS_PHYS (dma_ops->is_phys)
 123
 124 #endif  /* __KERNEL__ */
 125
 126 #ifdef CONFIG_X86_64
 127 #include <asm/pci_64.h>
 128 #endif
 129
 130 /* generic pci stuff */
 131 #include <asm-generic/pci.h>
 132
 133 #ifdef CONFIG_NUMA
 134 /* Returns the node based on pci bus */
 135 static inline int __pcibus_to_node(const struct pci_bus *bus)
 136 {
 137         const struct pci_sysdata *sd = bus->sysdata;
 138
 139         return sd->node;
 140 }
 141
 142 static inline const struct cpumask *
 143 cpumask_of_pcibus(const struct pci_bus *bus)
 144 {
 145         int node;
 146
 147         node = __pcibus_to_node(bus);
 148         return (node == -1) ? cpu_online_mask :
 149                               cpumask_of_node(node);
 150 }
 151 #endif
 152
 153 struct pci_setup_rom {
 154         struct setup_data data;
 155         uint16_t vendor;
 156         uint16_t devid;
 157         uint64_t pcilen;
 158         unsigned long segment;
 159         unsigned long bus;
 160         unsigned long device;
 161         unsigned long function;
 162         uint8_t romdata[0];
 163 };
 164
 165 #endif /* _ASM_X86_PCI_H */