kernel/dma/Kconfig

   1
   2 config HAS_DMA
   3         bool
   4         depends on !NO_DMA
   5         default y
   6
   7 config NEED_SG_DMA_LENGTH
   8         bool
   9
  10 config NEED_DMA_MAP_STATE
  11         bool
  12
  13 config ARCH_DMA_ADDR_T_64BIT
  14         def_bool 64BIT || PHYS_ADDR_T_64BIT
  15
  16 config HAVE_GENERIC_DMA_COHERENT
  17         bool
  18
  19 config ARCH_HAS_SYNC_DMA_FOR_DEVICE
  20         bool
  21
  22 config ARCH_HAS_SYNC_DMA_FOR_CPU
  23         bool
  24         select NEED_DMA_MAP_STATE
  25
  26 config ARCH_HAS_SYNC_DMA_FOR_CPU_ALL
  27         bool
  28
  29 config DMA_DIRECT_OPS
  30         bool
  31         depends on HAS_DMA
  32
  33 config DMA_NONCOHERENT_OPS
  34         bool
  35         depends on HAS_DMA
  36         select DMA_DIRECT_OPS
  37
  38 config DMA_NONCOHERENT_MMAP
  39         bool
  40         depends on DMA_NONCOHERENT_OPS
  41
  42 config DMA_NONCOHERENT_CACHE_SYNC
  43         bool
  44         depends on DMA_NONCOHERENT_OPS
  45
  46 config DMA_VIRT_OPS
  47         bool
  48         depends on HAS_DMA
  49
  50 config SWIOTLB
  51         bool
  52         select DMA_DIRECT_OPS
  53         select NEED_DMA_MAP_STATE