drivers/dma/Kconfig

   1 #
   2 # DMA engine configuration
   3 #
   4
   5 menuconfig DMADEVICES
   6         bool "DMA Engine support"
   7         depends on !HIGHMEM64G && HAS_DMA
   8         help
   9           DMA engines can do asynchronous data transfers without
  10           involving the host CPU.  Currently, this framework can be
  11           used to offload memory copies in the network stack and
  12           RAID operations in the MD driver.  This menu only presents
  13           DMA Device drivers supported by the configured arch, it may
  14           be empty in some cases.
  15
  16 if DMADEVICES
  17
  18 comment "DMA Devices"
  19
  20 config INTEL_IOATDMA
  21         tristate "Intel I/OAT DMA support"
  22         depends on PCI && X86
  23         select DMA_ENGINE
  24         select DCA
  25         help
  26           Enable support for the Intel(R) I/OAT DMA engine present
  27           in recent Intel Xeon chipsets.
  28
  29           Say Y here if you have such a chipset.
  30
  31           If unsure, say N.
  32
  33 config INTEL_IOP_ADMA
  34         tristate "Intel IOP ADMA support"
  35         depends on ARCH_IOP32X || ARCH_IOP33X || ARCH_IOP13XX
  36         select DMA_ENGINE
  37         help
  38           Enable support for the Intel(R) IOP Series RAID engines.
  39
  40 config DW_DMAC
  41         tristate "Synopsys DesignWare AHB DMA support"
  42         depends on AVR32
  43         select DMA_ENGINE
  44         default y if CPU_AT32AP7000
  45         help
  46           Support the Synopsys DesignWare AHB DMA controller.  This
  47           can be integrated in chips such as the Atmel AT32ap7000.
  48
  49 config FSL_DMA
  50         tristate "Freescale Elo and Elo Plus DMA support"
  51         depends on FSL_SOC
  52         select DMA_ENGINE
  53         ---help---
  54           Enable support for the Freescale Elo and Elo Plus DMA controllers.
  55           The Elo is the DMA controller on some 82xx and 83xx parts, and the
  56           Elo Plus is the DMA controller on 85xx and 86xx parts.
  57
  58 config MV_XOR
  59         bool "Marvell XOR engine support"
  60         depends on PLAT_ORION
  61         select DMA_ENGINE
  62         ---help---
  63           Enable support for the Marvell XOR engine.
  64
  65 config MX3_IPU
  66         bool "MX3x Image Processing Unit support"
  67         depends on ARCH_MX3
  68         select DMA_ENGINE
  69         default y
  70         help
  71           If you plan to use the Image Processing unit in the i.MX3x, say
  72           Y here. If unsure, select Y.
  73
  74 config MX3_IPU_IRQS
  75         int "Number of dynamically mapped interrupts for IPU"
  76         depends on MX3_IPU
  77         range 2 137
  78         default 4
  79         help
  80           Out of 137 interrupt sources on i.MX31 IPU only very few are used.
  81           To avoid bloating the irq_desc[] array we allocate a sufficient
  82           number of IRQ slots and map them dynamically to specific sources.
  83
  84 config DMA_ENGINE
  85         bool
  86
  87 comment "DMA Clients"
  88         depends on DMA_ENGINE
  89
  90 config NET_DMA
  91         bool "Network: TCP receive copy offload"
  92         depends on DMA_ENGINE && NET
  93         default (INTEL_IOATDMA || FSL_DMA)
  94         help
  95           This enables the use of DMA engines in the network stack to
  96           offload receive copy-to-user operations, freeing CPU cycles.
  97
  98           Say Y here if you enabled INTEL_IOATDMA or FSL_DMA, otherwise
  99           say N.
 100
 101 config ASYNC_TX_DMA
 102         bool "Async_tx: Offload support for the async_tx api"
 103         depends on DMA_ENGINE
 104         help
 105           This allows the async_tx api to take advantage of offload engines for
 106           memcpy, memset, xor, and raid6 p+q operations.  If your platform has
 107           a dma engine that can perform raid operations and you have enabled
 108           MD_RAID456 say Y.
 109
 110           If unsure, say N.
 111
 112 config DMATEST
 113         tristate "DMA Test client"
 114         depends on DMA_ENGINE
 115         help
 116           Simple DMA test client. Say N unless you're debugging a
 117           DMA Device driver.
 118
 119 endif