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 #if IS_ENABLED(CONFIG_VMD)
  27         bool vmd_domain;                /* True if in Intel VMD domain */
  28 #endif
  29 };
  30
  31 extern int pci_routeirq;
  32 extern int noioapicquirk;
  33 extern int noioapicreroute;
  34
  35 #ifdef CONFIG_PCI
  36
  37 #ifdef CONFIG_PCI_DOMAINS
  38 static inline int pci_domain_nr(struct pci_bus *bus)
  39 {
  40         struct pci_sysdata *sd = bus->sysdata;
  41
  42         return sd->domain;
  43 }
  44
  45 static 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
  52 static 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
  62 static 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
  77 extern unsigned int pcibios_assign_all_busses(void);
  78 extern 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
  89 extern 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
  95 extern int pcibios_enabled;
  96 void pcibios_config_init(void);
  97 void pcibios_scan_root(int bus);
  98
  99 void pcibios_set_master(struct pci_dev *dev);
 100 struct irq_routing_table *pcibios_get_irq_routing_table(void);
 101 int pcibios_set_irq_routing(struct pci_dev *dev, int pin, int irq);
 102
 103
 104 #define HAVE_PCI_MMAP
 105 extern 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
 111 extern void early_quirks(void);
 112 #else
 113 static inline void early_quirks(void) { }
 114 #endif
 115
 116 extern void pci_iommu_alloc(void);
 117
 118 #ifdef CONFIG_PCI_MSI
 119 /* implemented in arch/x86/kernel/apic/io_apic. */
 120 struct msi_desc;
 121 int native_setup_msi_irqs(struct pci_dev *dev, int nvec, int type);
 122 void native_teardown_msi_irq(unsigned int irq);
 123 void 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 */
 142 static 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
 149 static inline const struct cpumask *
 150 cpumask_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
 160 struct 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 */