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 <asm/io.h>
  11 #include <asm/pat.h>
  12 #include <asm/x86_init.h>
  13
  14 #ifdef __KERNEL__
  15
  16 struct pci_sysdata {
  17         int             domain;         /* PCI domain */
  18         int             node;           /* NUMA node */
  19 #ifdef CONFIG_ACPI
  20         struct acpi_device *companion;  /* ACPI companion device */
  21 #endif
  22 #ifdef CONFIG_X86_64
  23         void            *iommu;         /* IOMMU private data */
  24 #endif
  25 #ifdef CONFIG_PCI_MSI_IRQ_DOMAIN
  26         void            *fwnode;        /* IRQ domain for MSI assignment */
  27 #endif
  28 #if IS_ENABLED(CONFIG_VMD)
  29         bool vmd_domain;                /* True if in Intel VMD domain */
  30 #endif
  31 };
  32
  33 extern int pci_routeirq;
  34 extern int noioapicquirk;
  35 extern int noioapicreroute;
  36
  37 #ifdef CONFIG_PCI
  38
  39 #ifdef CONFIG_PCI_DOMAINS
  40 static inline int pci_domain_nr(struct pci_bus *bus)
  41 {
  42         struct pci_sysdata *sd = bus->sysdata;
  43
  44         return sd->domain;
  45 }
  46
  47 static inline int pci_proc_domain(struct pci_bus *bus)
  48 {
  49         return pci_domain_nr(bus);
  50 }
  51 #endif
  52
  53 #ifdef CONFIG_PCI_MSI_IRQ_DOMAIN
  54 static inline void *_pci_root_bus_fwnode(struct pci_bus *bus)
  55 {
  56         struct pci_sysdata *sd = bus->sysdata;
  57
  58         return sd->fwnode;
  59 }
  60
  61 #define pci_root_bus_fwnode     _pci_root_bus_fwnode
  62 #endif
  63
  64 static inline bool is_vmd(struct pci_bus *bus)
  65 {
  66 #if IS_ENABLED(CONFIG_VMD)
  67         struct pci_sysdata *sd = bus->sysdata;
  68
  69         return sd->vmd_domain;
  70 #else
  71         return false;
  72 #endif
  73 }
  74
  75 /* Can be used to override the logic in pci_scan_bus for skipping
  76    already-configured bus numbers - to be used for buggy BIOSes
  77    or architectures with incomplete PCI setup by the loader */
  78
  79 extern unsigned int pcibios_assign_all_busses(void);
  80 extern int pci_legacy_init(void);
  81 #else
  82 static inline int pcibios_assign_all_busses(void) { return 0; }
  83 #endif
  84
  85 extern unsigned long pci_mem_start;
  86 #define PCIBIOS_MIN_IO          0x1000
  87 #define PCIBIOS_MIN_MEM         (pci_mem_start)
  88
  89 #define PCIBIOS_MIN_CARDBUS_IO  0x4000
  90
  91 extern int pcibios_enabled;
  92 void pcibios_scan_root(int bus);
  93
  94 struct irq_routing_table *pcibios_get_irq_routing_table(void);
  95 int pcibios_set_irq_routing(struct pci_dev *dev, int pin, int irq);
  96
  97
  98 #define HAVE_PCI_MMAP
  99 #define arch_can_pci_mmap_wc()  pat_enabled()
 100 #define ARCH_GENERIC_PCI_MMAP_RESOURCE
 101
 102 #ifdef CONFIG_PCI
 103 extern void early_quirks(void);
 104 #else
 105 static inline void early_quirks(void) { }
 106 #endif
 107
 108 extern void pci_iommu_alloc(void);
 109
 110 #ifdef CONFIG_PCI_MSI
 111 /* implemented in arch/x86/kernel/apic/io_apic. */
 112 struct msi_desc;
 113 int native_setup_msi_irqs(struct pci_dev *dev, int nvec, int type);
 114 void native_teardown_msi_irq(unsigned int irq);
 115 void native_restore_msi_irqs(struct pci_dev *dev);
 116 #else
 117 #define native_setup_msi_irqs           NULL
 118 #define native_teardown_msi_irq         NULL
 119 #endif
 120
 121 #define PCI_DMA_BUS_IS_PHYS (dma_ops->is_phys)
 122
 123 #endif  /* __KERNEL__ */
 124
 125 #ifdef CONFIG_X86_64
 126 #include <asm/pci_64.h>
 127 #endif
 128
 129 /* generic pci stuff */
 130 #include <asm-generic/pci.h>
 131
 132 #ifdef CONFIG_NUMA
 133 /* Returns the node based on pci bus */
 134 static inline int __pcibus_to_node(const struct pci_bus *bus)
 135 {
 136         const struct pci_sysdata *sd = bus->sysdata;
 137
 138         return sd->node;
 139 }
 140
 141 static inline const struct cpumask *
 142 cpumask_of_pcibus(const struct pci_bus *bus)
 143 {
 144         int node;
 145
 146         node = __pcibus_to_node(bus);
 147         return (node == -1) ? cpu_online_mask :
 148                               cpumask_of_node(node);
 149 }
 150 #endif
 151
 152 struct pci_setup_rom {
 153         struct setup_data data;
 154         uint16_t vendor;
 155         uint16_t devid;
 156         uint64_t pcilen;
 157         unsigned long segment;
 158         unsigned long bus;
 159         unsigned long device;
 160         unsigned long function;
 161         uint8_t romdata[0];
 162 };
 163
 164 #endif /* _ASM_X86_PCI_H */