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
  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         struct pci_dev  *vmd_dev;       /* VMD Device if in Intel VMD domain */
  29 #endif
  30 };
  31
  32 extern int pci_routeirq;
  33 extern int noioapicquirk;
  34 extern int noioapicreroute;
  35
  36 static 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
  44 static inline int pci_domain_nr(struct pci_bus *bus)
  45 {
  46         return to_pci_sysdata(bus)->domain;
  47 }
  48
  49 static 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
  56 static 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)
  65 static 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
  77 extern unsigned int pcibios_assign_all_busses(void);
  78 extern int pci_legacy_init(void);
  79 #else
  80 static inline int pcibios_assign_all_busses(void) { return 0; }
  81 #endif
  82
  83 extern 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
  89 extern int pcibios_enabled;
  90 void pcibios_scan_root(int bus);
  91
  92 struct irq_routing_table *pcibios_get_irq_routing_table(void);
  93 int 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
 101 extern void early_quirks(void);
 102 #else
 103 static inline void early_quirks(void) { }
 104 #endif
 105
 106 extern void pci_iommu_alloc(void);
 107
 108 #ifdef CONFIG_PCI_MSI
 109 /* implemented in arch/x86/kernel/apic/io_apic. */
 110 struct msi_desc;
 111 int native_setup_msi_irqs(struct pci_dev *dev, int nvec, int type);
 112 void native_teardown_msi_irq(unsigned int irq);
 113 void native_restore_msi_irqs(struct pci_dev *dev);
 114 #else
 115 #define native_setup_msi_irqs           NULL
 116 #define native_teardown_msi_irq         NULL
 117 #endif
 118
 119 /* generic pci stuff */
 120 #include <asm-generic/pci.h>
 121
 122 #ifdef CONFIG_NUMA
 123 /* Returns the node based on pci bus */
 124 static inline int __pcibus_to_node(const struct pci_bus *bus)
 125 {
 126         return to_pci_sysdata(bus)->node;
 127 }
 128
 129 static inline const struct cpumask *
 130 cpumask_of_pcibus(const struct pci_bus *bus)
 131 {
 132         int node;
 133
 134         node = __pcibus_to_node(bus);
 135         return (node == NUMA_NO_NODE) ? cpu_online_mask :
 136                               cpumask_of_node(node);
 137 }
 138 #endif
 139
 140 struct pci_setup_rom {
 141         struct setup_data data;
 142         uint16_t vendor;
 143         uint16_t devid;
 144         uint64_t pcilen;
 145         unsigned long segment;
 146         unsigned long bus;
 147         unsigned long device;
 148         unsigned long function;
 149         uint8_t romdata[0];
 150 };
 151
 152 #endif /* _ASM_X86_PCI_H */