include/asm-x86/pci_64.h

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