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 DMA_DIRECT_OPS
  27         bool
  28         depends on HAS_DMA
  29
  30 config DMA_NONCOHERENT_OPS
  31         bool
  32         depends on HAS_DMA
  33         select DMA_DIRECT_OPS
  34
  35 config DMA_NONCOHERENT_MMAP
  36         bool
  37         depends on DMA_NONCOHERENT_OPS
  38
  39 config DMA_NONCOHERENT_CACHE_SYNC
  40         bool
  41         depends on DMA_NONCOHERENT_OPS
  42
  43 config DMA_VIRT_OPS
  44         bool
  45         depends on HAS_DMA
  46
  47 config SWIOTLB
  48         bool
  49         select DMA_DIRECT_OPS
  50         select NEED_DMA_MAP_STATE