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Linux/arch/x86/include/asm/pci.h

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  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 */
165 

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