include/asm-x86_64/pci.h

   1 #ifndef __x8664_PCI_H
   2 #define __x8664_PCI_H
   3
   4 #include <asm/io.h>
   5
   6 #ifdef __KERNEL__
   7
   8 #include <linux/mm.h> /* for struct page */
   9
  10 /* Can be used to override the logic in pci_scan_bus for skipping
  11    already-configured bus numbers - to be used for buggy BIOSes
  12    or architectures with incomplete PCI setup by the loader */
  13
  14 #ifdef CONFIG_PCI
  15 extern unsigned int pcibios_assign_all_busses(void);
  16 #else
  17 #define pcibios_assign_all_busses()     0
  18 #endif
  19 #define pcibios_scan_all_fns(a, b)      0
  20
  21 extern unsigned long pci_mem_start;
  22 #define PCIBIOS_MIN_IO          0x1000
  23 #define PCIBIOS_MIN_MEM         (pci_mem_start)
  24
  25 #define PCIBIOS_MIN_CARDBUS_IO  0x4000
  26
  27 void pcibios_config_init(void);
  28 struct pci_bus * pcibios_scan_root(int bus);
  29 extern int (*pci_config_read)(int seg, int bus, int dev, int fn, int reg, int len, u32 *value);
  30 extern int (*pci_config_write)(int seg, int bus, int dev, int fn, int reg, int len, u32 value);
  31
  32 void pcibios_set_master(struct pci_dev *dev);
  33 void pcibios_penalize_isa_irq(int irq, int active);
  34 struct irq_routing_table *pcibios_get_irq_routing_table(void);
  35 int pcibios_set_irq_routing(struct pci_dev *dev, int pin, int irq);
  36
  37 #include <linux/types.h>
  38 #include <linux/slab.h>
  39 #include <asm/scatterlist.h>
  40 #include <linux/string.h>
  41 #include <asm/page.h>
  42
  43 extern void pci_iommu_alloc(void);
  44 extern int iommu_setup(char *opt);
  45
  46 /* The PCI address space does equal the physical memory
  47  * address space.  The networking and block device layers use
  48  * this boolean for bounce buffer decisions
  49  *
  50  * On AMD64 it mostly equals, but we set it to zero if a hardware
  51  * IOMMU (gart) of sotware IOMMU (swiotlb) is available.
  52  */
  53 #define PCI_DMA_BUS_IS_PHYS (dma_ops->is_phys)
  54
  55 #if defined(CONFIG_IOMMU) || defined(CONFIG_CALGARY_IOMMU)
  56
  57 /*
  58  * x86-64 always supports DAC, but sometimes it is useful to force
  59  * devices through the IOMMU to get automatic sg list merging.
  60  * Optional right now.
  61  */
  62 extern int iommu_sac_force;
  63 #define pci_dac_dma_supported(pci_dev, mask)    (!iommu_sac_force)
  64
  65 #define DECLARE_PCI_UNMAP_ADDR(ADDR_NAME)       \
  66         dma_addr_t ADDR_NAME;
  67 #define DECLARE_PCI_UNMAP_LEN(LEN_NAME)         \
  68         __u32 LEN_NAME;
  69 #define pci_unmap_addr(PTR, ADDR_NAME)                  \
  70         ((PTR)->ADDR_NAME)
  71 #define pci_unmap_addr_set(PTR, ADDR_NAME, VAL)         \
  72         (((PTR)->ADDR_NAME) = (VAL))
  73 #define pci_unmap_len(PTR, LEN_NAME)                    \
  74         ((PTR)->LEN_NAME)
  75 #define pci_unmap_len_set(PTR, LEN_NAME, VAL)           \
  76         (((PTR)->LEN_NAME) = (VAL))
  77
  78 #else
  79 /* No IOMMU */
  80
  81 #define pci_dac_dma_supported(pci_dev, mask)    1
  82
  83 #define DECLARE_PCI_UNMAP_ADDR(ADDR_NAME)
  84 #define DECLARE_PCI_UNMAP_LEN(LEN_NAME)
  85 #define pci_unmap_addr(PTR, ADDR_NAME)          (0)
  86 #define pci_unmap_addr_set(PTR, ADDR_NAME, VAL) do { } while (0)
  87 #define pci_unmap_len(PTR, LEN_NAME)            (0)
  88 #define pci_unmap_len_set(PTR, LEN_NAME, VAL)   do { } while (0)
  89
  90 #endif
  91
  92 #include <asm-generic/pci-dma-compat.h>
  93
  94 static inline dma64_addr_t
  95 pci_dac_page_to_dma(struct pci_dev *pdev, struct page *page, unsigned long offset, int direction)
  96 {
  97         return ((dma64_addr_t) page_to_phys(page) +
  98                 (dma64_addr_t) offset);
  99 }
 100
 101 static inline struct page *
 102 pci_dac_dma_to_page(struct pci_dev *pdev, dma64_addr_t dma_addr)
 103 {
 104         return virt_to_page(__va(dma_addr));
 105 }
 106
 107 static inline unsigned long
 108 pci_dac_dma_to_offset(struct pci_dev *pdev, dma64_addr_t dma_addr)
 109 {
 110         return (dma_addr & ~PAGE_MASK);
 111 }
 112
 113 static inline void
 114 pci_dac_dma_sync_single_for_cpu(struct pci_dev *pdev, dma64_addr_t dma_addr, size_t len, int direction)
 115 {
 116 }
 117
 118 static inline void
 119 pci_dac_dma_sync_single_for_device(struct pci_dev *pdev, dma64_addr_t dma_addr, size_t len, int direction)
 120 {
 121         flush_write_buffers();
 122 }
 123
 124 #ifdef CONFIG_PCI
 125 static inline void pci_dma_burst_advice(struct pci_dev *pdev,
 126                                         enum pci_dma_burst_strategy *strat,
 127                                         unsigned long *strategy_parameter)
 128 {
 129         *strat = PCI_DMA_BURST_INFINITY;
 130         *strategy_parameter = ~0UL;
 131 }
 132 #endif
 133
 134 #define HAVE_PCI_MMAP
 135 extern int pci_mmap_page_range(struct pci_dev *dev, struct vm_area_struct *vma,
 136                                enum pci_mmap_state mmap_state, int write_combine);
 137
 138 static inline void pcibios_add_platform_entries(struct pci_dev *dev)
 139 {
 140 }
 141
 142 #endif /* __KERNEL__ */
 143
 144 /* generic pci stuff */
 145 #ifdef CONFIG_PCI
 146 #include <asm-generic/pci.h>
 147 #endif
 148
 149 #endif /* __x8664_PCI_H */