include/asm-x86_64/pci.h

   1 #ifndef __x8664_PCI_H
   2 #define __x8664_PCI_H
   3
   4 #include <linux/config.h>
   5 #include <asm/io.h>
   6
   7 #ifdef __KERNEL__
   8
   9 #include <linux/mm.h> /* for struct page */
  10
  11 /* Can be used to override the logic in pci_scan_bus for skipping
  12    already-configured bus numbers - to be used for buggy BIOSes
  13    or architectures with incomplete PCI setup by the loader */
  14
  15 #ifdef CONFIG_PCI
  16 extern unsigned int pcibios_assign_all_busses(void);
  17 #else
  18 #define pcibios_assign_all_busses()     0
  19 #endif
  20 #define pcibios_scan_all_fns(a, b)      0
  21
  22 extern int no_iommu, force_iommu;
  23
  24 extern unsigned long pci_mem_start;
  25 #define PCIBIOS_MIN_IO          0x1000
  26 #define PCIBIOS_MIN_MEM         (pci_mem_start)
  27
  28 #define PCIBIOS_MIN_CARDBUS_IO  0x4000
  29
  30 void pcibios_config_init(void);
  31 struct pci_bus * pcibios_scan_root(int bus);
  32 extern int (*pci_config_read)(int seg, int bus, int dev, int fn, int reg, int len, u32 *value);
  33 extern int (*pci_config_write)(int seg, int bus, int dev, int fn, int reg, int len, u32 value);
  34
  35 void pcibios_set_master(struct pci_dev *dev);
  36 void pcibios_penalize_isa_irq(int irq, int active);
  37 struct irq_routing_table *pcibios_get_irq_routing_table(void);
  38 int pcibios_set_irq_routing(struct pci_dev *dev, int pin, int irq);
  39
  40 #include <linux/types.h>
  41 #include <linux/slab.h>
  42 #include <asm/scatterlist.h>
  43 #include <linux/string.h>
  44 #include <asm/page.h>
  45 #include <linux/dma-mapping.h> /* for have_iommu */
  46
  47 extern int iommu_setup(char *opt);
  48
  49 /* The PCI address space does equal the physical memory
  50  * address space.  The networking and block device layers use
  51  * this boolean for bounce buffer decisions
  52  *
  53  * On AMD64 it mostly equals, but we set it to zero if a hardware
  54  * IOMMU (gart) of sotware IOMMU (swiotlb) is available.
  55  */
  56 #define PCI_DMA_BUS_IS_PHYS (dma_ops->is_phys)
  57
  58 #ifdef CONFIG_GART_IOMMU
  59
  60 /*
  61  * x86-64 always supports DAC, but sometimes it is useful to force
  62  * devices through the IOMMU to get automatic sg list merging.
  63  * Optional right now.
  64  */
  65 extern int iommu_sac_force;
  66 #define pci_dac_dma_supported(pci_dev, mask)    (!iommu_sac_force)
  67
  68 #define DECLARE_PCI_UNMAP_ADDR(ADDR_NAME)       \
  69         dma_addr_t ADDR_NAME;
  70 #define DECLARE_PCI_UNMAP_LEN(LEN_NAME)         \
  71         __u32 LEN_NAME;
  72 #define pci_unmap_addr(PTR, ADDR_NAME)                  \
  73         ((PTR)->ADDR_NAME)
  74 #define pci_unmap_addr_set(PTR, ADDR_NAME, VAL)         \
  75         (((PTR)->ADDR_NAME) = (VAL))
  76 #define pci_unmap_len(PTR, LEN_NAME)                    \
  77         ((PTR)->LEN_NAME)
  78 #define pci_unmap_len_set(PTR, LEN_NAME, VAL)           \
  79         (((PTR)->LEN_NAME) = (VAL))
  80
  81 #else
  82 /* No IOMMU */
  83
  84 #define pci_dac_dma_supported(pci_dev, mask)    1
  85
  86 #define DECLARE_PCI_UNMAP_ADDR(ADDR_NAME)
  87 #define DECLARE_PCI_UNMAP_LEN(LEN_NAME)
  88 #define pci_unmap_addr(PTR, ADDR_NAME)          (0)
  89 #define pci_unmap_addr_set(PTR, ADDR_NAME, VAL) do { } while (0)
  90 #define pci_unmap_len(PTR, LEN_NAME)            (0)
  91 #define pci_unmap_len_set(PTR, LEN_NAME, VAL)   do { } while (0)
  92
  93 #endif
  94
  95 #include <asm-generic/pci-dma-compat.h>
  96
  97 static inline dma64_addr_t
  98 pci_dac_page_to_dma(struct pci_dev *pdev, struct page *page, unsigned long offset, int direction)
  99 {
 100         return ((dma64_addr_t) page_to_phys(page) +
 101                 (dma64_addr_t) offset);
 102 }
 103
 104 static inline struct page *
 105 pci_dac_dma_to_page(struct pci_dev *pdev, dma64_addr_t dma_addr)
 106 {
 107         return virt_to_page(__va(dma_addr));
 108 }
 109
 110 static inline unsigned long
 111 pci_dac_dma_to_offset(struct pci_dev *pdev, dma64_addr_t dma_addr)
 112 {
 113         return (dma_addr & ~PAGE_MASK);
 114 }
 115
 116 static inline void
 117 pci_dac_dma_sync_single_for_cpu(struct pci_dev *pdev, dma64_addr_t dma_addr, size_t len, int direction)
 118 {
 119 }
 120
 121 static inline void
 122 pci_dac_dma_sync_single_for_device(struct pci_dev *pdev, dma64_addr_t dma_addr, size_t len, int direction)
 123 {
 124         flush_write_buffers();
 125 }
 126
 127 #ifdef CONFIG_PCI
 128 static inline void pci_dma_burst_advice(struct pci_dev *pdev,
 129                                         enum pci_dma_burst_strategy *strat,
 130                                         unsigned long *strategy_parameter)
 131 {
 132         *strat = PCI_DMA_BURST_INFINITY;
 133         *strategy_parameter = ~0UL;
 134 }
 135 #endif
 136
 137 #define HAVE_PCI_MMAP
 138 extern int pci_mmap_page_range(struct pci_dev *dev, struct vm_area_struct *vma,
 139                                enum pci_mmap_state mmap_state, int write_combine);
 140
 141 static inline void pcibios_add_platform_entries(struct pci_dev *dev)
 142 {
 143 }
 144
 145 #endif /* __KERNEL__ */
 146
 147 /* generic pci stuff */
 148 #ifdef CONFIG_PCI
 149 #include <asm-generic/pci.h>
 150 #endif
 151
 152 #endif /* __x8664_PCI_H */