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 dma32_reserve_bootmem(void);
  26 extern void pci_iommu_alloc(void);
  27
  28 /* The PCI address space does equal the physical memory
  29  * address space.  The networking and block device layers use
  30  * this boolean for bounce buffer decisions
  31  *
  32  * On AMD64 it mostly equals, but we set it to zero if a hardware
  33  * IOMMU (gart) of sotware IOMMU (swiotlb) is available.
  34  */
  35 #define PCI_DMA_BUS_IS_PHYS (dma_ops->is_phys)
  36
  37 #if defined(CONFIG_GART_IOMMU) || defined(CONFIG_CALGARY_IOMMU)
  38
  39 #define DECLARE_PCI_UNMAP_ADDR(ADDR_NAME)       \
  40         dma_addr_t ADDR_NAME;
  41 #define DECLARE_PCI_UNMAP_LEN(LEN_NAME)         \
  42         __u32 LEN_NAME;
  43 #define pci_unmap_addr(PTR, ADDR_NAME)                  \
  44         ((PTR)->ADDR_NAME)
  45 #define pci_unmap_addr_set(PTR, ADDR_NAME, VAL)         \
  46         (((PTR)->ADDR_NAME) = (VAL))
  47 #define pci_unmap_len(PTR, LEN_NAME)                    \
  48         ((PTR)->LEN_NAME)
  49 #define pci_unmap_len_set(PTR, LEN_NAME, VAL)           \
  50         (((PTR)->LEN_NAME) = (VAL))
  51
  52 #else
  53 /* No IOMMU */
  54
  55 #define DECLARE_PCI_UNMAP_ADDR(ADDR_NAME)
  56 #define DECLARE_PCI_UNMAP_LEN(LEN_NAME)
  57 #define pci_unmap_addr(PTR, ADDR_NAME)          (0)
  58 #define pci_unmap_addr_set(PTR, ADDR_NAME, VAL) do { } while (0)
  59 #define pci_unmap_len(PTR, LEN_NAME)            (0)
  60 #define pci_unmap_len_set(PTR, LEN_NAME, VAL)   do { } while (0)
  61
  62 #endif
  63
  64 #endif /* __KERNEL__ */
  65
  66 #endif /* __x8664_PCI_H */