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
  14 struct 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 };
  27
  28 extern int pci_routeirq;
  29 extern int noioapicquirk;
  30 extern int noioapicreroute;
  31
  32 #ifdef CONFIG_PCI
  33
  34 #ifdef CONFIG_PCI_DOMAINS
  35 static inline int pci_domain_nr(struct pci_bus *bus)
  36 {
  37         struct pci_sysdata *sd = bus->sysdata;
  38
  39         return sd->domain;
  40 }
  41
  42 static inline int pci_proc_domain(struct pci_bus *bus)
  43 {
  44         return pci_domain_nr(bus);
  45 }
  46 #endif
  47
  48 #ifdef CONFIG_PCI_MSI_IRQ_DOMAIN
  49 static inline void *_pci_root_bus_fwnode(struct pci_bus *bus)
  50 {
  51         struct pci_sysdata *sd = bus->sysdata;
  52
  53         return sd->fwnode;
  54 }
  55
  56 #define pci_root_bus_fwnode     _pci_root_bus_fwnode
  57 #endif
  58
  59 /* Can be used to override the logic in pci_scan_bus for skipping
  60    already-configured bus numbers - to be used for buggy BIOSes
  61    or architectures with incomplete PCI setup by the loader */
  62
  63 extern unsigned int pcibios_assign_all_busses(void);
  64 extern int pci_legacy_init(void);
  65 # ifdef CONFIG_ACPI
  66 #  define x86_default_pci_init pci_acpi_init
  67 # else
  68 #  define x86_default_pci_init pci_legacy_init
  69 # endif
  70 #else
  71 # define pcibios_assign_all_busses()    0
  72 # define x86_default_pci_init           NULL
  73 #endif
  74
  75 extern unsigned long pci_mem_start;
  76 #define PCIBIOS_MIN_IO          0x1000
  77 #define PCIBIOS_MIN_MEM         (pci_mem_start)
  78
  79 #define PCIBIOS_MIN_CARDBUS_IO  0x4000
  80
  81 extern int pcibios_enabled;
  82 void pcibios_config_init(void);
  83 void pcibios_scan_root(int bus);
  84
  85 void pcibios_set_master(struct pci_dev *dev);
  86 struct irq_routing_table *pcibios_get_irq_routing_table(void);
  87 int pcibios_set_irq_routing(struct pci_dev *dev, int pin, int irq);
  88
  89
  90 #define HAVE_PCI_MMAP
  91 extern int pci_mmap_page_range(struct pci_dev *dev, struct vm_area_struct *vma,
  92                                enum pci_mmap_state mmap_state,
  93                                int write_combine);
  94
  95
  96 #ifdef CONFIG_PCI
  97 extern void early_quirks(void);
  98 #else
  99 static inline void early_quirks(void) { }
 100 #endif
 101
 102 extern void pci_iommu_alloc(void);
 103
 104 #ifdef CONFIG_PCI_MSI
 105 /* implemented in arch/x86/kernel/apic/io_apic. */
 106 struct msi_desc;
 107 int native_setup_msi_irqs(struct pci_dev *dev, int nvec, int type);
 108 void native_teardown_msi_irq(unsigned int irq);
 109 void native_restore_msi_irqs(struct pci_dev *dev);
 110 #else
 111 #define native_setup_msi_irqs           NULL
 112 #define native_teardown_msi_irq         NULL
 113 #endif
 114
 115 #define PCI_DMA_BUS_IS_PHYS (dma_ops->is_phys)
 116
 117 #endif  /* __KERNEL__ */
 118
 119 #ifdef CONFIG_X86_64
 120 #include <asm/pci_64.h>
 121 #endif
 122
 123 /* generic pci stuff */
 124 #include <asm-generic/pci.h>
 125
 126 #ifdef CONFIG_NUMA
 127 /* Returns the node based on pci bus */
 128 static inline int __pcibus_to_node(const struct pci_bus *bus)
 129 {
 130         const struct pci_sysdata *sd = bus->sysdata;
 131
 132         return sd->node;
 133 }
 134
 135 static inline const struct cpumask *
 136 cpumask_of_pcibus(const struct pci_bus *bus)
 137 {
 138         int node;
 139
 140         node = __pcibus_to_node(bus);
 141         return (node == -1) ? cpu_online_mask :
 142                               cpumask_of_node(node);
 143 }
 144 #endif
 145
 146 struct pci_setup_rom {
 147         struct setup_data data;
 148         uint16_t vendor;
 149         uint16_t devid;
 150         uint64_t pcilen;
 151         unsigned long segment;
 152         unsigned long bus;
 153         unsigned long device;
 154         unsigned long function;
 155         uint8_t romdata[0];
 156 };
 157
 158 #endif /* _ASM_X86_PCI_H */