include/asm-x86/pci_64.h

   1 #ifndef __x8664_PCI_H
   2 #define __x8664_PCI_H
   3
   4
   5 #ifdef __KERNEL__
   6
   7
   8 #ifdef CONFIG_CALGARY_IOMMU
   9 static inline void* pci_iommu(struct pci_bus *bus)
  10 {
  11         struct pci_sysdata *sd = bus->sysdata;
  12         return sd->iommu;
  13 }
  14
  15 static inline void set_pci_iommu(struct pci_bus *bus, void *val)
  16 {
  17         struct pci_sysdata *sd = bus->sysdata;
  18         sd->iommu = val;
  19 }
  20 #endif /* CONFIG_CALGARY_IOMMU */
  21
  22
  23 extern int (*pci_config_read)(int seg, int bus, int dev, int fn, int reg, int len, u32 *value);
  24 extern int (*pci_config_write)(int seg, int bus, int dev, int fn, int reg, int len, u32 value);
  25
  26
  27
  28 extern void pci_iommu_alloc(void);
  29 extern int iommu_setup(char *opt);
  30
  31 /* The PCI address space does equal the physical memory
  32  * address space.  The networking and block device layers use
  33  * this boolean for bounce buffer decisions
  34  *
  35  * On AMD64 it mostly equals, but we set it to zero if a hardware
  36  * IOMMU (gart) of sotware IOMMU (swiotlb) is available.
  37  */
  38 #define PCI_DMA_BUS_IS_PHYS (dma_ops->is_phys)
  39
  40 #if defined(CONFIG_GART_IOMMU) || defined(CONFIG_CALGARY_IOMMU)
  41
  42 #define DECLARE_PCI_UNMAP_ADDR(ADDR_NAME)       \
  43         dma_addr_t ADDR_NAME;
  44 #define DECLARE_PCI_UNMAP_LEN(LEN_NAME)         \
  45         __u32 LEN_NAME;
  46 #define pci_unmap_addr(PTR, ADDR_NAME)                  \
  47         ((PTR)->ADDR_NAME)
  48 #define pci_unmap_addr_set(PTR, ADDR_NAME, VAL)         \
  49         (((PTR)->ADDR_NAME) = (VAL))
  50 #define pci_unmap_len(PTR, LEN_NAME)                    \
  51         ((PTR)->LEN_NAME)
  52 #define pci_unmap_len_set(PTR, LEN_NAME, VAL)           \
  53         (((PTR)->LEN_NAME) = (VAL))
  54
  55 #else
  56 /* No IOMMU */
  57
  58 #define DECLARE_PCI_UNMAP_ADDR(ADDR_NAME)
  59 #define DECLARE_PCI_UNMAP_LEN(LEN_NAME)
  60 #define pci_unmap_addr(PTR, ADDR_NAME)          (0)
  61 #define pci_unmap_addr_set(PTR, ADDR_NAME, VAL) do { } while (0)
  62 #define pci_unmap_len(PTR, LEN_NAME)            (0)
  63 #define pci_unmap_len_set(PTR, LEN_NAME, VAL)   do { } while (0)
  64
  65 #endif
  66
  67 #endif /* __KERNEL__ */
  68
  69
  70 #endif /* __x8664_PCI_H */