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 <asm/scatterlist.h>
   9 #include <asm/io.h>
  10
  11 #ifdef __KERNEL__
  12
  13 struct pci_sysdata {
  14         int             domain;         /* PCI domain */
  15         int             node;           /* NUMA node */
  16 #ifdef CONFIG_X86_64
  17         void            *iommu;         /* IOMMU private data */
  18 #endif
  19 };
  20
  21 extern int pci_routeirq;
  22 extern int noioapicquirk;
  23 extern int noioapicreroute;
  24
  25 /* scan a bus after allocating a pci_sysdata for it */
  26 extern struct pci_bus *pci_scan_bus_on_node(int busno, struct pci_ops *ops,
  27                                             int node);
  28 extern struct pci_bus *pci_scan_bus_with_sysdata(int busno);
  29
  30 static inline int pci_domain_nr(struct pci_bus *bus)
  31 {
  32         struct pci_sysdata *sd = bus->sysdata;
  33         return sd->domain;
  34 }
  35
  36 static inline int pci_proc_domain(struct pci_bus *bus)
  37 {
  38         return pci_domain_nr(bus);
  39 }
  40
  41
  42 /* Can be used to override the logic in pci_scan_bus for skipping
  43    already-configured bus numbers - to be used for buggy BIOSes
  44    or architectures with incomplete PCI setup by the loader */
  45
  46 #ifdef CONFIG_PCI
  47 extern unsigned int pcibios_assign_all_busses(void);
  48 #else
  49 #define pcibios_assign_all_busses()     0
  50 #endif
  51
  52 extern unsigned long pci_mem_start;
  53 #define PCIBIOS_MIN_IO          0x1000
  54 #define PCIBIOS_MIN_MEM         (pci_mem_start)
  55
  56 #define PCIBIOS_MIN_CARDBUS_IO  0x4000
  57
  58 void pcibios_config_init(void);
  59 struct pci_bus *pcibios_scan_root(int bus);
  60
  61 void pcibios_set_master(struct pci_dev *dev);
  62 void pcibios_penalize_isa_irq(int irq, int active);
  63 struct irq_routing_table *pcibios_get_irq_routing_table(void);
  64 int pcibios_set_irq_routing(struct pci_dev *dev, int pin, int irq);
  65
  66
  67 #define HAVE_PCI_MMAP
  68 extern int pci_mmap_page_range(struct pci_dev *dev, struct vm_area_struct *vma,
  69                                enum pci_mmap_state mmap_state,
  70                                int write_combine);
  71
  72
  73 #ifdef CONFIG_PCI
  74 extern void early_quirks(void);
  75 static inline void pci_dma_burst_advice(struct pci_dev *pdev,
  76                                         enum pci_dma_burst_strategy *strat,
  77                                         unsigned long *strategy_parameter)
  78 {
  79         *strat = PCI_DMA_BURST_INFINITY;
  80         *strategy_parameter = ~0UL;
  81 }
  82 #else
  83 static inline void early_quirks(void) { }
  84 #endif
  85
  86 extern void pci_iommu_alloc(void);
  87
  88 /* MSI arch hook */
  89 #define arch_setup_msi_irqs arch_setup_msi_irqs
  90
  91 #define PCI_DMA_BUS_IS_PHYS (dma_ops->is_phys)
  92
  93 #if defined(CONFIG_X86_64) || defined(CONFIG_DMAR) || defined(CONFIG_DMA_API_DEBUG)
  94
  95 #define DECLARE_PCI_UNMAP_ADDR(ADDR_NAME)       \
  96                 dma_addr_t ADDR_NAME;
  97 #define DECLARE_PCI_UNMAP_LEN(LEN_NAME)         \
  98                 __u32 LEN_NAME;
  99 #define pci_unmap_addr(PTR, ADDR_NAME)                  \
 100                 ((PTR)->ADDR_NAME)
 101 #define pci_unmap_addr_set(PTR, ADDR_NAME, VAL)         \
 102                 (((PTR)->ADDR_NAME) = (VAL))
 103 #define pci_unmap_len(PTR, LEN_NAME)                    \
 104                 ((PTR)->LEN_NAME)
 105 #define pci_unmap_len_set(PTR, LEN_NAME, VAL)           \
 106                 (((PTR)->LEN_NAME) = (VAL))
 107
 108 #else
 109
 110 #define DECLARE_PCI_UNMAP_ADDR(ADDR_NAME)       dma_addr_t ADDR_NAME[0];
 111 #define DECLARE_PCI_UNMAP_LEN(LEN_NAME) unsigned LEN_NAME[0];
 112 #define pci_unmap_addr(PTR, ADDR_NAME)  sizeof((PTR)->ADDR_NAME)
 113 #define pci_unmap_addr_set(PTR, ADDR_NAME, VAL) \
 114                 do { break; } while (pci_unmap_addr(PTR, ADDR_NAME))
 115 #define pci_unmap_len(PTR, LEN_NAME)            sizeof((PTR)->LEN_NAME)
 116 #define pci_unmap_len_set(PTR, LEN_NAME, VAL) \
 117                 do { break; } while (pci_unmap_len(PTR, LEN_NAME))
 118
 119 #endif
 120
 121 #endif  /* __KERNEL__ */
 122
 123 #ifdef CONFIG_X86_64
 124 #include "pci_64.h"
 125 #endif
 126
 127 /* implement the pci_ DMA API in terms of the generic device dma_ one */
 128 #include <asm-generic/pci-dma-compat.h>
 129
 130 /* generic pci stuff */
 131 #include <asm-generic/pci.h>
 132 #define PCIBIOS_MAX_MEM_32 0xffffffff
 133
 134 #ifdef CONFIG_NUMA
 135 /* Returns the node based on pci bus */
 136 static inline int __pcibus_to_node(const struct pci_bus *bus)
 137 {
 138         const struct pci_sysdata *sd = bus->sysdata;
 139
 140         return sd->node;
 141 }
 142
 143 static inline const struct cpumask *
 144 cpumask_of_pcibus(const struct pci_bus *bus)
 145 {
 146         int node;
 147
 148         node = __pcibus_to_node(bus);
 149         return (node == -1) ? cpu_online_mask :
 150                               cpumask_of_node(node);
 151 }
 152 #endif
 153
 154 #endif /* _ASM_X86_PCI_H */