ioatdma: fix race between updating ioat->head and IOAT_COMPLETION_PENDING

[mirror_ubuntu-bionic-kernel.git] / drivers / dma / Kconfig

#
# DMA engine configuration
#

menuconfig DMADEVICES
	bool "DMA Engine support"
	depends on HAS_DMA
	help
	  DMA engines can do asynchronous data transfers without
	  involving the host CPU.  Currently, this framework can be
	  used to offload memory copies in the network stack and
	  RAID operations in the MD driver.  This menu only presents
	  DMA Device drivers supported by the configured arch, it may
	  be empty in some cases.

config DMADEVICES_DEBUG
        bool "DMA Engine debugging"
        depends on DMADEVICES != n
        help
          This is an option for use by developers; most people should
          say N here.  This enables DMA engine core and driver debugging.

config DMADEVICES_VDEBUG
        bool "DMA Engine verbose debugging"
        depends on DMADEVICES_DEBUG != n
        help
          This is an option for use by developers; most people should
          say N here.  This enables deeper (more verbose) debugging of
          the DMA engine core and drivers.


if DMADEVICES

comment "DMA Devices"

config INTEL_MID_DMAC
	tristate "Intel MID DMA support for Peripheral DMA controllers"
	depends on PCI && X86
	select DMA_ENGINE
	default n
	help
	  Enable support for the Intel(R) MID DMA engine present
	  in Intel MID chipsets.

	  Say Y here if you have such a chipset.

	  If unsure, say N.

config ASYNC_TX_ENABLE_CHANNEL_SWITCH
	bool

config AMBA_PL08X
	bool "ARM PrimeCell PL080 or PL081 support"
	depends on ARM_AMBA
	select DMA_ENGINE
	select DMA_VIRTUAL_CHANNELS
	help
	  Platform has a PL08x DMAC device
	  which can provide DMA engine support

config INTEL_IOATDMA
	tristate "Intel I/OAT DMA support"
	depends on PCI && X86
	select DMA_ENGINE
	select DCA
	select ASYNC_TX_DISABLE_PQ_VAL_DMA
	select ASYNC_TX_DISABLE_XOR_VAL_DMA
	help
	  Enable support for the Intel(R) I/OAT DMA engine present
	  in recent Intel Xeon chipsets.

	  Say Y here if you have such a chipset.

	  If unsure, say N.

config INTEL_IOP_ADMA
	tristate "Intel IOP ADMA support"
	depends on ARCH_IOP32X || ARCH_IOP33X || ARCH_IOP13XX
	select DMA_ENGINE
	select ASYNC_TX_ENABLE_CHANNEL_SWITCH
	help
	  Enable support for the Intel(R) IOP Series RAID engines.

config DW_DMAC
	tristate "Synopsys DesignWare AHB DMA support"
	select DMA_ENGINE
	default y if CPU_AT32AP7000
	help
	  Support the Synopsys DesignWare AHB DMA controller.  This
	  can be integrated in chips such as the Atmel AT32ap7000.

config DW_DMAC_BIG_ENDIAN_IO
	bool "Use big endian I/O register access"
	default y if AVR32
	depends on DW_DMAC
	help
	  Say yes here to use big endian I/O access when reading and writing
	  to the DMA controller registers. This is needed on some platforms,
	  like the Atmel AVR32 architecture.

	  If unsure, use the default setting.

config AT_HDMAC
	tristate "Atmel AHB DMA support"
	depends on ARCH_AT91
	select DMA_ENGINE
	help
	  Support the Atmel AHB DMA controller.

config FSL_DMA
	tristate "Freescale Elo and Elo Plus DMA support"
	depends on FSL_SOC
	select DMA_ENGINE
	select ASYNC_TX_ENABLE_CHANNEL_SWITCH
	---help---
	  Enable support for the Freescale Elo and Elo Plus DMA controllers.
	  The Elo is the DMA controller on some 82xx and 83xx parts, and the
	  Elo Plus is the DMA controller on 85xx and 86xx parts.

config MPC512X_DMA
	tristate "Freescale MPC512x built-in DMA engine support"
	depends on PPC_MPC512x || PPC_MPC831x
	select DMA_ENGINE
	---help---
	  Enable support for the Freescale MPC512x built-in DMA engine.

config MV_XOR
	bool "Marvell XOR engine support"
	depends on PLAT_ORION
	select DMA_ENGINE
	select ASYNC_TX_ENABLE_CHANNEL_SWITCH
	---help---
	  Enable support for the Marvell XOR engine.

config MX3_IPU
	bool "MX3x Image Processing Unit support"
	depends on ARCH_MXC
	select DMA_ENGINE
	default y
	help
	  If you plan to use the Image Processing unit in the i.MX3x, say
	  Y here. If unsure, select Y.

config MX3_IPU_IRQS
	int "Number of dynamically mapped interrupts for IPU"
	depends on MX3_IPU
	range 2 137
	default 4
	help
	  Out of 137 interrupt sources on i.MX31 IPU only very few are used.
	  To avoid bloating the irq_desc[] array we allocate a sufficient
	  number of IRQ slots and map them dynamically to specific sources.

config TXX9_DMAC
	tristate "Toshiba TXx9 SoC DMA support"
	depends on MACH_TX49XX || MACH_TX39XX
	select DMA_ENGINE
	help
	  Support the TXx9 SoC internal DMA controller.  This can be
	  integrated in chips such as the Toshiba TX4927/38/39.

config TEGRA20_APB_DMA
	bool "NVIDIA Tegra20 APB DMA support"
	depends on ARCH_TEGRA
	select DMA_ENGINE
	help
	  Support for the NVIDIA Tegra20 APB DMA controller driver. The
	  DMA controller is having multiple DMA channel which can be
	  configured for different peripherals like audio, UART, SPI,
	  I2C etc which is in APB bus.
	  This DMA controller transfers data from memory to peripheral fifo
	  or vice versa. It does not support memory to memory data transfer.



config SH_DMAE
	tristate "Renesas SuperH DMAC support"
	depends on (SUPERH && SH_DMA) || (ARM && ARCH_SHMOBILE)
	depends on !SH_DMA_API
	select DMA_ENGINE
	help
	  Enable support for the Renesas SuperH DMA controllers.

config COH901318
	bool "ST-Ericsson COH901318 DMA support"
	select DMA_ENGINE
	depends on ARCH_U300
	help
	  Enable support for ST-Ericsson COH 901 318 DMA.

config STE_DMA40
	bool "ST-Ericsson DMA40 support"
	depends on ARCH_U8500
	select DMA_ENGINE
	help
	  Support for ST-Ericsson DMA40 controller

config AMCC_PPC440SPE_ADMA
	tristate "AMCC PPC440SPe ADMA support"
	depends on 440SPe || 440SP
	select DMA_ENGINE
	select ARCH_HAS_ASYNC_TX_FIND_CHANNEL
	select ASYNC_TX_ENABLE_CHANNEL_SWITCH
	help
	  Enable support for the AMCC PPC440SPe RAID engines.

config TIMB_DMA
	tristate "Timberdale FPGA DMA support"
	depends on MFD_TIMBERDALE || HAS_IOMEM
	select DMA_ENGINE
	help
	  Enable support for the Timberdale FPGA DMA engine.

config SIRF_DMA
	tristate "CSR SiRFprimaII/SiRFmarco DMA support"
	depends on ARCH_SIRF
	select DMA_ENGINE
	help
	  Enable support for the CSR SiRFprimaII DMA engine.

config TI_EDMA
	tristate "TI EDMA support"
	depends on ARCH_DAVINCI
	select DMA_ENGINE
	select DMA_VIRTUAL_CHANNELS
	default n
	help
	  Enable support for the TI EDMA controller. This DMA
	  engine is found on TI DaVinci and AM33xx parts.

config ARCH_HAS_ASYNC_TX_FIND_CHANNEL
	bool

config PL330_DMA
	tristate "DMA API Driver for PL330"
	select DMA_ENGINE
	depends on ARM_AMBA
	help
	  Select if your platform has one or more PL330 DMACs.
	  You need to provide platform specific settings via
	  platform_data for a dma-pl330 device.

config PCH_DMA
	tristate "Intel EG20T PCH / LAPIS Semicon IOH(ML7213/ML7223/ML7831) DMA"
	depends on PCI && X86
	select DMA_ENGINE
	help
	  Enable support for Intel EG20T PCH DMA engine.

	  This driver also can be used for LAPIS Semiconductor IOH(Input/
	  Output Hub), ML7213, ML7223 and ML7831.
	  ML7213 IOH is for IVI(In-Vehicle Infotainment) use, ML7223 IOH is
	  for MP(Media Phone) use and ML7831 IOH is for general purpose use.
	  ML7213/ML7223/ML7831 is companion chip for Intel Atom E6xx series.
	  ML7213/ML7223/ML7831 is completely compatible for Intel EG20T PCH.

config IMX_SDMA
	tristate "i.MX SDMA support"
	depends on ARCH_MXC
	select DMA_ENGINE
	help
	  Support the i.MX SDMA engine. This engine is integrated into
	  Freescale i.MX25/31/35/51/53 chips.

config IMX_DMA
	tristate "i.MX DMA support"
	depends on ARCH_MXC
	select DMA_ENGINE
	help
	  Support the i.MX DMA engine. This engine is integrated into
	  Freescale i.MX1/21/27 chips.

config MXS_DMA
	bool "MXS DMA support"
	depends on SOC_IMX23 || SOC_IMX28 || SOC_IMX6Q
	select STMP_DEVICE
	select DMA_ENGINE
	help
	  Support the MXS DMA engine. This engine including APBH-DMA
	  and APBX-DMA is integrated into Freescale i.MX23/28 chips.

config EP93XX_DMA
	bool "Cirrus Logic EP93xx DMA support"
	depends on ARCH_EP93XX
	select DMA_ENGINE
	help
	  Enable support for the Cirrus Logic EP93xx M2P/M2M DMA controller.

config DMA_SA11X0
	tristate "SA-11x0 DMA support"
	depends on ARCH_SA1100
	select DMA_ENGINE
	select DMA_VIRTUAL_CHANNELS
	help
	  Support the DMA engine found on Intel StrongARM SA-1100 and
	  SA-1110 SoCs.  This DMA engine can only be used with on-chip
	  devices.

config MMP_TDMA
	bool "MMP Two-Channel DMA support"
	depends on ARCH_MMP
	select DMA_ENGINE
	help
	  Support the MMP Two-Channel DMA engine.
	  This engine used for MMP Audio DMA and pxa910 SQU.

	  Say Y here if you enabled MMP ADMA, otherwise say N.

config DMA_OMAP
	tristate "OMAP DMA support"
	depends on ARCH_OMAP
	select DMA_ENGINE
	select DMA_VIRTUAL_CHANNELS

config MMP_PDMA
	bool "MMP PDMA support"
	depends on (ARCH_MMP || ARCH_PXA)
	select DMA_ENGINE
	help
	  Support the MMP PDMA engine for PXA and MMP platfrom.

config DMA_ENGINE
	bool

config DMA_VIRTUAL_CHANNELS
	tristate

comment "DMA Clients"
	depends on DMA_ENGINE

config NET_DMA
	bool "Network: TCP receive copy offload"
	depends on DMA_ENGINE && NET
	default (INTEL_IOATDMA || FSL_DMA)
	help
	  This enables the use of DMA engines in the network stack to
	  offload receive copy-to-user operations, freeing CPU cycles.

	  Say Y here if you enabled INTEL_IOATDMA or FSL_DMA, otherwise
	  say N.

config ASYNC_TX_DMA
	bool "Async_tx: Offload support for the async_tx api"
	depends on DMA_ENGINE
	help
	  This allows the async_tx api to take advantage of offload engines for
	  memcpy, memset, xor, and raid6 p+q operations.  If your platform has
	  a dma engine that can perform raid operations and you have enabled
	  MD_RAID456 say Y.

	  If unsure, say N.

config DMATEST
	tristate "DMA Test client"
	depends on DMA_ENGINE
	help
	  Simple DMA test client. Say N unless you're debugging a
	  DMA Device driver.

endif