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/pat.h>
  13 #include <asm/x86_init.h>
  14
  15 #ifdef __KERNEL__
  16
  17 struct pci_sysdata {
  18         int             domain;         /* PCI domain */
  19         int             node;           /* NUMA node */
  20 #ifdef CONFIG_ACPI
  21         struct acpi_device *companion;  /* ACPI companion device */
  22 #endif
  23 #ifdef CONFIG_X86_64
  24         void            *iommu;         /* IOMMU private data */
  25 #endif
  26 #ifdef CONFIG_PCI_MSI_IRQ_DOMAIN
  27         void            *fwnode;        /* IRQ domain for MSI assignment */
  28 #endif
  29 #if IS_ENABLED(CONFIG_VMD)
  30         bool vmd_domain;                /* True if in Intel VMD domain */
  31 #endif
  32 };
  33
  34 extern int pci_routeirq;
  35 extern int noioapicquirk;
  36 extern int noioapicreroute;
  37
  38 #ifdef CONFIG_PCI
  39
  40 #ifdef CONFIG_PCI_DOMAINS
  41 static inline int pci_domain_nr(struct pci_bus *bus)
  42 {
  43         struct pci_sysdata *sd = bus->sysdata;
  44
  45         return sd->domain;
  46 }
  47
  48 static inline int pci_proc_domain(struct pci_bus *bus)
  49 {
  50         return pci_domain_nr(bus);
  51 }
  52 #endif
  53
  54 #ifdef CONFIG_PCI_MSI_IRQ_DOMAIN
  55 static inline void *_pci_root_bus_fwnode(struct pci_bus *bus)
  56 {
  57         struct pci_sysdata *sd = bus->sysdata;
  58
  59         return sd->fwnode;
  60 }
  61
  62 #define pci_root_bus_fwnode     _pci_root_bus_fwnode
  63 #endif
  64
  65 static inline bool is_vmd(struct pci_bus *bus)
  66 {
  67 #if IS_ENABLED(CONFIG_VMD)
  68         struct pci_sysdata *sd = bus->sysdata;
  69
  70         return sd->vmd_domain;
  71 #else
  72         return false;
  73 #endif
  74 }
  75
  76 /* Can be used to override the logic in pci_scan_bus for skipping
  77    already-configured bus numbers - to be used for buggy BIOSes
  78    or architectures with incomplete PCI setup by the loader */
  79
  80 extern unsigned int pcibios_assign_all_busses(void);
  81 extern int pci_legacy_init(void);
  82 #else
  83 static inline int pcibios_assign_all_busses(void) { return 0; }
  84 #endif
  85
  86 extern unsigned long pci_mem_start;
  87 #define PCIBIOS_MIN_IO          0x1000
  88 #define PCIBIOS_MIN_MEM         (pci_mem_start)
  89
  90 #define PCIBIOS_MIN_CARDBUS_IO  0x4000
  91
  92 extern int pcibios_enabled;
  93 void pcibios_scan_root(int bus);
  94
  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 #endif  /* __KERNEL__ */
 122
 123 #ifdef CONFIG_X86_64
 124 #include <asm/pci_64.h>
 125 #endif
 126
 127 /* generic pci stuff */
 128 #include <asm-generic/pci.h>
 129
 130 #ifdef CONFIG_NUMA
 131 /* Returns the node based on pci bus */
 132 static inline int __pcibus_to_node(const struct pci_bus *bus)
 133 {
 134         const struct pci_sysdata *sd = bus->sysdata;
 135
 136         return sd->node;
 137 }
 138
 139 static inline const struct cpumask *
 140 cpumask_of_pcibus(const struct pci_bus *bus)
 141 {
 142         int node;
 143
 144         node = __pcibus_to_node(bus);
 145         return (node == NUMA_NO_NODE) ? cpu_online_mask :
 146                               cpumask_of_node(node);
 147 }
 148 #endif
 149
 150 struct pci_setup_rom {
 151         struct setup_data data;
 152         uint16_t vendor;
 153         uint16_t devid;
 154         uint64_t pcilen;
 155         unsigned long segment;
 156         unsigned long bus;
 157         unsigned long device;
 158         unsigned long function;
 159         uint8_t romdata[0];
 160 };
 161
 162 #endif /* _ASM_X86_PCI_H */