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);
  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/io.h>
  45 #include <asm/page.h>
  46
  47 extern int iommu_setup(char *opt);
  48
  49 #ifdef CONFIG_GART_IOMMU
  50 /* The PCI address space does equal the physical memory
  51  * address space.  The networking and block device layers use
  52  * this boolean for bounce buffer decisions
  53  *
  54  * On AMD64 it mostly equals, but we set it to zero to tell some subsystems
  55  * that an IOMMU is available.
  56  */
  57 #define PCI_DMA_BUS_IS_PHYS     (no_iommu ? 1 : 0)
  58
  59 /*
  60  * x86-64 always supports DAC, but sometimes it is useful to force
  61  * devices through the IOMMU to get automatic sg list merging.
  62  * Optional right now.
  63  */
  64 extern int iommu_sac_force;
  65 #define pci_dac_dma_supported(pci_dev, mask)    (!iommu_sac_force)
  66
  67 #define DECLARE_PCI_UNMAP_ADDR(ADDR_NAME)       \
  68         dma_addr_t ADDR_NAME;
  69 #define DECLARE_PCI_UNMAP_LEN(LEN_NAME)         \
  70         __u32 LEN_NAME;
  71 #define pci_unmap_addr(PTR, ADDR_NAME)                  \
  72         ((PTR)->ADDR_NAME)
  73 #define pci_unmap_addr_set(PTR, ADDR_NAME, VAL)         \
  74         (((PTR)->ADDR_NAME) = (VAL))
  75 #define pci_unmap_len(PTR, LEN_NAME)                    \
  76         ((PTR)->LEN_NAME)
  77 #define pci_unmap_len_set(PTR, LEN_NAME, VAL)           \
  78         (((PTR)->LEN_NAME) = (VAL))
  79
  80 #else
  81 /* No IOMMU */
  82
  83 #define PCI_DMA_BUS_IS_PHYS     1
  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 #define HAVE_PCI_MMAP
 128 extern int pci_mmap_page_range(struct pci_dev *dev, struct vm_area_struct *vma,
 129                                enum pci_mmap_state mmap_state, int write_combine);
 130
 131 static inline void pcibios_add_platform_entries(struct pci_dev *dev)
 132 {
 133 }
 134
 135 #endif /* __KERNEL__ */
 136
 137 /* generic pci stuff */
 138 #ifdef CONFIG_PCI
 139 #include <asm-generic/pci.h>
 140 #endif
 141
 142 #endif /* __x8664_PCI_H */